From: Eugen Hristev <eugen.hristev@xxxxxxxxxxxxx>
This splits the Atmel ISC driver into a common base: atmel-isc-base.c
and the driver probe/dt part , atmel-sama5d2-isc.c
This is needed to keep a common ground for the sensor controller which will
be reused.
The atmel-isc will use the common symbols inside the atmel-isc-base
Future driver will also use the same symbols and redefine different aspects,
for a different version of the ISC.
This is done to avoid complete code duplication by creating a totally
different driver for the new variant of the ISC.
Signed-off-by: Eugen Hristev <eugen.hristev@xxxxxxxxxxxxx>
---
Hello Hans,
I created a subsequent patch that fixes the checkpatch issues. (2/2 in this
series now).
Thanks,
Eugen
Changes in v3:
- Fixed up the externs, moved to header file
- moved the module parameters to atmel-isc-base.c
Changes in v2:
- renamed atmel-isc.c to atmel-sama5d2-isc.c as sama5d2 is the SoC that
includes this hardware block. The module will still be named atmel-isc.ko
- removed ifdef around definition of ATMEL_ISC_NAME
- moved external declarations in the specific files, this was breaking
module loading
MAINTAINERS | 4 +-
drivers/media/platform/atmel/Makefile | 4 +-
drivers/media/platform/atmel/atmel-isc-base.c | 2153 ++++++++++++++++++
drivers/media/platform/atmel/atmel-isc.c | 2634 ----------------------
drivers/media/platform/atmel/atmel-isc.h | 208 ++
drivers/media/platform/atmel/atmel-sama5d2-isc.c | 344 +++
6 files changed, 2711 insertions(+), 2636 deletions(-)
create mode 100644 drivers/media/platform/atmel/atmel-isc-base.c
delete mode 100644 drivers/media/platform/atmel/atmel-isc.c
create mode 100644 drivers/media/platform/atmel/atmel-isc.h
create mode 100644 drivers/media/platform/atmel/atmel-sama5d2-isc.c
diff --git a/MAINTAINERS b/MAINTAINERS
index 5cfbea4..3dc8289 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -10270,7 +10270,9 @@ MICROCHIP ISC DRIVER
M: Eugen Hristev <eugen.hristev@xxxxxxxxxxxxx>
L: linux-media@xxxxxxxxxxxxxxx
S: Supported
-F: drivers/media/platform/atmel/atmel-isc.c
+F: drivers/media/platform/atmel/atmel-sama5d2-isc.c
+F: drivers/media/platform/atmel/atmel-isc.h
+F: drivers/media/platform/atmel/atmel-isc-base.c
F: drivers/media/platform/atmel/atmel-isc-regs.h
F: Documentation/devicetree/bindings/media/atmel-isc.txt
diff --git a/drivers/media/platform/atmel/Makefile b/drivers/media/platform/atmel/Makefile
index 27000d0..9462736 100644
--- a/drivers/media/platform/atmel/Makefile
+++ b/drivers/media/platform/atmel/Makefile
@@ -1,2 +1,4 @@
-obj-$(CONFIG_VIDEO_ATMEL_ISC) += atmel-isc.o
+atmel-isc-objs = atmel-sama5d2-isc.o atmel-isc-base.o
+
obj-$(CONFIG_VIDEO_ATMEL_ISI) += atmel-isi.o
+obj-$(CONFIG_VIDEO_ATMEL_ISC) += atmel-isc.o
diff --git a/drivers/media/platform/atmel/atmel-isc-base.c b/drivers/media/platform/atmel/atmel-isc-base.c
new file mode 100644
index 0000000..e27e790
--- /dev/null
+++ b/drivers/media/platform/atmel/atmel-isc-base.c
@@ -0,0 +1,2153 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Microchip Image Sensor Controller (ISC) common driver base
+ *
+ * Copyright (C) 2016-2019 Microchip Technology, Inc.
+ *
+ * Author: Songjun Wu <songjun.wu@xxxxxxxxxxxxx>
+ * Author: Eugen Hristev <eugen.hristev@xxxxxxxxxxxxx>
+ *
+ */
+
+#include <linux/clk.h>
+#include <linux/clkdev.h>
+#include <linux/clk-provider.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/math64.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_graph.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/videodev2.h>
+
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-event.h>
+#include <media/v4l2-image-sizes.h>
+#include <media/v4l2-ioctl.h>
+#include <media/v4l2-fwnode.h>
+#include <media/v4l2-subdev.h>
+#include <media/videobuf2-dma-contig.h>
+
+#include "atmel-isc-regs.h"
+#include "atmel-isc.h"
+
+unsigned int debug;
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "debug level (0-2)");
+
+unsigned int sensor_preferred = 1;
+module_param(sensor_preferred, uint, 0644);
+MODULE_PARM_DESC(sensor_preferred,
+ "Sensor is preferred to output the specified format (1-on 0-off), default 1");
+
+/* This is a list of the formats that the ISC can *output* */
+struct isc_format controller_formats[] = {
+ {
+ .fourcc = V4L2_PIX_FMT_ARGB444,
+ },
+ {
+ .fourcc = V4L2_PIX_FMT_ARGB555,
+ },
+ {
+ .fourcc = V4L2_PIX_FMT_RGB565,
+ },
+ {
+ .fourcc = V4L2_PIX_FMT_ABGR32,
+ },
+ {
+ .fourcc = V4L2_PIX_FMT_XBGR32,
+ },
+ {
+ .fourcc = V4L2_PIX_FMT_YUV420,
+ },
+ {
+ .fourcc = V4L2_PIX_FMT_YUYV,
+ },
+ {
+ .fourcc = V4L2_PIX_FMT_YUV422P,
+ },
+ {
+ .fourcc = V4L2_PIX_FMT_GREY,
+ },
+};
+
+/* This is a list of formats that the ISC can receive as *input* */
+struct isc_format formats_list[] = {
+ {
+ .fourcc = V4L2_PIX_FMT_SBGGR8,
+ .mbus_code = MEDIA_BUS_FMT_SBGGR8_1X8,
+ .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT,
+ .cfa_baycfg = ISC_BAY_CFG_BGBG,
+ },
+ {
+ .fourcc = V4L2_PIX_FMT_SGBRG8,
+ .mbus_code = MEDIA_BUS_FMT_SGBRG8_1X8,
+ .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT,
+ .cfa_baycfg = ISC_BAY_CFG_GBGB,
+ },
+ {
+ .fourcc = V4L2_PIX_FMT_SGRBG8,
+ .mbus_code = MEDIA_BUS_FMT_SGRBG8_1X8,
+ .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT,
+ .cfa_baycfg = ISC_BAY_CFG_GRGR,
+ },
+ {
+ .fourcc = V4L2_PIX_FMT_SRGGB8,
+ .mbus_code = MEDIA_BUS_FMT_SRGGB8_1X8,
+ .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT,
+ .cfa_baycfg = ISC_BAY_CFG_RGRG,
+ },
+ {
+ .fourcc = V4L2_PIX_FMT_SBGGR10,
+ .mbus_code = MEDIA_BUS_FMT_SBGGR10_1X10,
+ .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TEN,
+ .cfa_baycfg = ISC_BAY_CFG_RGRG,
+ },
+ {
+ .fourcc = V4L2_PIX_FMT_SGBRG10,
+ .mbus_code = MEDIA_BUS_FMT_SGBRG10_1X10,
+ .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TEN,
+ .cfa_baycfg = ISC_BAY_CFG_GBGB,
+ },
+ {
+ .fourcc = V4L2_PIX_FMT_SGRBG10,
+ .mbus_code = MEDIA_BUS_FMT_SGRBG10_1X10,
+ .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TEN,
+ .cfa_baycfg = ISC_BAY_CFG_GRGR,
+ },
+ {
+ .fourcc = V4L2_PIX_FMT_SRGGB10,
+ .mbus_code = MEDIA_BUS_FMT_SRGGB10_1X10,
+ .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TEN,
+ .cfa_baycfg = ISC_BAY_CFG_RGRG,
+ },
+ {
+ .fourcc = V4L2_PIX_FMT_SBGGR12,
+ .mbus_code = MEDIA_BUS_FMT_SBGGR12_1X12,
+ .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TWELVE,
+ .cfa_baycfg = ISC_BAY_CFG_BGBG,
+ },
+ {
+ .fourcc = V4L2_PIX_FMT_SGBRG12,
+ .mbus_code = MEDIA_BUS_FMT_SGBRG12_1X12,
+ .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TWELVE,
+ .cfa_baycfg = ISC_BAY_CFG_GBGB,
+ },
+ {
+ .fourcc = V4L2_PIX_FMT_SGRBG12,
+ .mbus_code = MEDIA_BUS_FMT_SGRBG12_1X12,
+ .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TWELVE,
+ .cfa_baycfg = ISC_BAY_CFG_GRGR,
+ },
+ {
+ .fourcc = V4L2_PIX_FMT_SRGGB12,
+ .mbus_code = MEDIA_BUS_FMT_SRGGB12_1X12,
+ .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TWELVE,
+ .cfa_baycfg = ISC_BAY_CFG_RGRG,
+ },
+ {
+ .fourcc = V4L2_PIX_FMT_GREY,
+ .mbus_code = MEDIA_BUS_FMT_Y8_1X8,
+ .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT,
+ },
+ {
+ .fourcc = V4L2_PIX_FMT_YUYV,
+ .mbus_code = MEDIA_BUS_FMT_YUYV8_2X8,
+ .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT,
+ },
+ {
+ .fourcc = V4L2_PIX_FMT_RGB565,
+ .mbus_code = MEDIA_BUS_FMT_RGB565_2X8_LE,
+ .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT,
+ },
+};
+
+/* Gamma table with gamma 1/2.2 */
+const u32 isc_gamma_table[GAMMA_MAX + 1][GAMMA_ENTRIES] = {
+ /* 0 --> gamma 1/1.8 */
+ { 0x65, 0x66002F, 0x950025, 0xBB0020, 0xDB001D, 0xF8001A,
+ 0x1130018, 0x12B0017, 0x1420016, 0x1580014, 0x16D0013, 0x1810012,
+ 0x1940012, 0x1A60012, 0x1B80011, 0x1C90010, 0x1DA0010, 0x1EA000F,
+ 0x1FA000F, 0x209000F, 0x218000F, 0x227000E, 0x235000E, 0x243000E,
+ 0x251000E, 0x25F000D, 0x26C000D, 0x279000D, 0x286000D, 0x293000C,
+ 0x2A0000C, 0x2AC000C, 0x2B8000C, 0x2C4000C, 0x2D0000B, 0x2DC000B,
+ 0x2E7000B, 0x2F3000B, 0x2FE000B, 0x309000B, 0x314000B, 0x31F000A,
+ 0x32A000A, 0x334000B, 0x33F000A, 0x349000A, 0x354000A, 0x35E000A,
+ 0x368000A, 0x372000A, 0x37C000A, 0x386000A, 0x3900009, 0x399000A,
+ 0x3A30009, 0x3AD0009, 0x3B60009, 0x3BF000A, 0x3C90009, 0x3D20009,
+ 0x3DB0009, 0x3E40009, 0x3ED0009, 0x3F60009 },
+
+ /* 1 --> gamma 1/2 */
+ { 0x7F, 0x800034, 0xB50028, 0xDE0021, 0x100001E, 0x11E001B,
+ 0x1390019, 0x1520017, 0x16A0015, 0x1800014, 0x1940014, 0x1A80013,
+ 0x1BB0012, 0x1CD0011, 0x1DF0010, 0x1EF0010, 0x200000F, 0x20F000F,
+ 0x21F000E, 0x22D000F, 0x23C000E, 0x24A000E, 0x258000D, 0x265000D,
+ 0x273000C, 0x27F000D, 0x28C000C, 0x299000C, 0x2A5000C, 0x2B1000B,
+ 0x2BC000C, 0x2C8000B, 0x2D3000C, 0x2DF000B, 0x2EA000A, 0x2F5000A,
+ 0x2FF000B, 0x30A000A, 0x314000B, 0x31F000A, 0x329000A, 0x333000A,
+ 0x33D0009, 0x3470009, 0x350000A, 0x35A0009, 0x363000A, 0x36D0009,
+ 0x3760009, 0x37F0009, 0x3880009, 0x3910009, 0x39A0009, 0x3A30009,
+ 0x3AC0008, 0x3B40009, 0x3BD0008, 0x3C60008, 0x3CE0008, 0x3D60009,
+ 0x3DF0008, 0x3E70008, 0x3EF0008, 0x3F70008 },
+
+ /* 2 --> gamma 1/2.2 */
+ { 0x99, 0x9B0038, 0xD4002A, 0xFF0023, 0x122001F, 0x141001B,
+ 0x15D0019, 0x1760017, 0x18E0015, 0x1A30015, 0x1B80013, 0x1CC0012,
+ 0x1DE0011, 0x1F00010, 0x2010010, 0x2110010, 0x221000F, 0x230000F,
+ 0x23F000E, 0x24D000E, 0x25B000D, 0x269000C, 0x276000C, 0x283000C,
+ 0x28F000C, 0x29B000C, 0x2A7000C, 0x2B3000B, 0x2BF000B, 0x2CA000B,
+ 0x2D5000B, 0x2E0000A, 0x2EB000A, 0x2F5000A, 0x2FF000A, 0x30A000A,
+ 0x3140009, 0x31E0009, 0x327000A, 0x3310009, 0x33A0009, 0x3440009,
+ 0x34D0009, 0x3560009, 0x35F0009, 0x3680008, 0x3710008, 0x3790009,
+ 0x3820008, 0x38A0008, 0x3930008, 0x39B0008, 0x3A30008, 0x3AB0008,
+ 0x3B30008, 0x3BB0008, 0x3C30008, 0x3CB0007, 0x3D20008, 0x3DA0007,
+ 0x3E20007, 0x3E90007, 0x3F00008, 0x3F80007 },
+};
+
+#define ISC_IS_FORMAT_RAW(mbus_code) \
+ (((mbus_code) & 0xf000) == 0x3000)
+
+static inline void isc_update_awb_ctrls(struct isc_device *isc)
+{
+ struct isc_ctrls *ctrls = &isc->ctrls;
+
+ regmap_write(isc->regmap, ISC_WB_O_RGR,
+ (ISC_WB_O_ZERO_VAL - (ctrls->offset[ISC_HIS_CFG_MODE_R])) |
+ ((ISC_WB_O_ZERO_VAL - ctrls->offset[ISC_HIS_CFG_MODE_GR]) << 16));
+ regmap_write(isc->regmap, ISC_WB_O_BGB,
+ (ISC_WB_O_ZERO_VAL - (ctrls->offset[ISC_HIS_CFG_MODE_B])) |
+ ((ISC_WB_O_ZERO_VAL - ctrls->offset[ISC_HIS_CFG_MODE_GB]) << 16));
+ regmap_write(isc->regmap, ISC_WB_G_RGR,
+ ctrls->gain[ISC_HIS_CFG_MODE_R] |
+ (ctrls->gain[ISC_HIS_CFG_MODE_GR] << 16));
+ regmap_write(isc->regmap, ISC_WB_G_BGB,
+ ctrls->gain[ISC_HIS_CFG_MODE_B] |
+ (ctrls->gain[ISC_HIS_CFG_MODE_GB] << 16));
+}
+
+static inline void isc_reset_awb_ctrls(struct isc_device *isc)
+{
+ int c;
+
+ for (c = ISC_HIS_CFG_MODE_GR; c <= ISC_HIS_CFG_MODE_B; c++) {
+ /* gains have a fixed point at 9 decimals */
+ isc->ctrls.gain[c] = 1 << 9;
+ /* offsets are in 2's complements, the value
+ * will be substracted from ISC_WB_O_ZERO_VAL to obtain
+ * 2's complement of a value between 0 and
+ * ISC_WB_O_ZERO_VAL >> 1
+ */
+ isc->ctrls.offset[c] = ISC_WB_O_ZERO_VAL;
+ }
+}
+
+static int isc_wait_clk_stable(struct clk_hw *hw)
+{
+ struct isc_clk *isc_clk = to_isc_clk(hw);
+ struct regmap *regmap = isc_clk->regmap;
+ unsigned long timeout = jiffies + usecs_to_jiffies(1000);
+ unsigned int status;
+
+ while (time_before(jiffies, timeout)) {
+ regmap_read(regmap, ISC_CLKSR, &status);
+ if (!(status & ISC_CLKSR_SIP))
+ return 0;
+
+ usleep_range(10, 250);
+ }
+
+ return -ETIMEDOUT;
+}
+
+static int isc_clk_prepare(struct clk_hw *hw)
+{
+ struct isc_clk *isc_clk = to_isc_clk(hw);
+
+ if (isc_clk->id == ISC_ISPCK)
+ pm_runtime_get_sync(isc_clk->dev);
+
+ return isc_wait_clk_stable(hw);
+}
+
+static void isc_clk_unprepare(struct clk_hw *hw)
+{
+ struct isc_clk *isc_clk = to_isc_clk(hw);
+
+ isc_wait_clk_stable(hw);
+
+ if (isc_clk->id == ISC_ISPCK)
+ pm_runtime_put_sync(isc_clk->dev);
+}
+
+static int isc_clk_enable(struct clk_hw *hw)
+{
+ struct isc_clk *isc_clk = to_isc_clk(hw);
+ u32 id = isc_clk->id;
+ struct regmap *regmap = isc_clk->regmap;
+ unsigned long flags;
+ unsigned int status;
+
+ dev_dbg(isc_clk->dev, "ISC CLK: %s, div = %d, parent id = %d\n",
+ __func__, isc_clk->div, isc_clk->parent_id);
+
+ spin_lock_irqsave(&isc_clk->lock, flags);
+ regmap_update_bits(regmap, ISC_CLKCFG,
+ ISC_CLKCFG_DIV_MASK(id) | ISC_CLKCFG_SEL_MASK(id),
+ (isc_clk->div << ISC_CLKCFG_DIV_SHIFT(id)) |
+ (isc_clk->parent_id << ISC_CLKCFG_SEL_SHIFT(id)));
+
+ regmap_write(regmap, ISC_CLKEN, ISC_CLK(id));
+ spin_unlock_irqrestore(&isc_clk->lock, flags);
+
+ regmap_read(regmap, ISC_CLKSR, &status);
+ if (status & ISC_CLK(id))
+ return 0;
+ else
+ return -EINVAL;
+}
+
+static void isc_clk_disable(struct clk_hw *hw)
+{
+ struct isc_clk *isc_clk = to_isc_clk(hw);
+ u32 id = isc_clk->id;
+ unsigned long flags;
+
+ spin_lock_irqsave(&isc_clk->lock, flags);
+ regmap_write(isc_clk->regmap, ISC_CLKDIS, ISC_CLK(id));
+ spin_unlock_irqrestore(&isc_clk->lock, flags);
+}
+
+static int isc_clk_is_enabled(struct clk_hw *hw)
+{
+ struct isc_clk *isc_clk = to_isc_clk(hw);
+ u32 status;
+
+ if (isc_clk->id == ISC_ISPCK)
+ pm_runtime_get_sync(isc_clk->dev);
+
+ regmap_read(isc_clk->regmap, ISC_CLKSR, &status);
+
+ if (isc_clk->id == ISC_ISPCK)
+ pm_runtime_put_sync(isc_clk->dev);
+
+ return status & ISC_CLK(isc_clk->id) ? 1 : 0;
+}
+
+static unsigned long
+isc_clk_recalc_rate(struct clk_hw *hw, unsigned long parent_rate)
+{
+ struct isc_clk *isc_clk = to_isc_clk(hw);
+
+ return DIV_ROUND_CLOSEST(parent_rate, isc_clk->div + 1);
+}
+
+static int isc_clk_determine_rate(struct clk_hw *hw,
+ struct clk_rate_request *req)
+{
+ struct isc_clk *isc_clk = to_isc_clk(hw);
+ long best_rate = -EINVAL;
+ int best_diff = -1;
+ unsigned int i, div;
+
+ for (i = 0; i < clk_hw_get_num_parents(hw); i++) {
+ struct clk_hw *parent;
+ unsigned long parent_rate;
+
+ parent = clk_hw_get_parent_by_index(hw, i);
+ if (!parent)
+ continue;
+
+ parent_rate = clk_hw_get_rate(parent);
+ if (!parent_rate)
+ continue;
+
+ for (div = 1; div < ISC_CLK_MAX_DIV + 2; div++) {
+ unsigned long rate;
+ int diff;
+
+ rate = DIV_ROUND_CLOSEST(parent_rate, div);
+ diff = abs(req->rate - rate);
+
+ if (best_diff < 0 || best_diff > diff) {
+ best_rate = rate;
+ best_diff = diff;
+ req->best_parent_rate = parent_rate;
+ req->best_parent_hw = parent;
+ }
+
+ if (!best_diff || rate < req->rate)
+ break;
+ }
+
+ if (!best_diff)
+ break;
+ }
+
+ dev_dbg(isc_clk->dev,
+ "ISC CLK: %s, best_rate = %ld, parent clk: %s @ %ld\n",
+ __func__, best_rate,
+ __clk_get_name((req->best_parent_hw)->clk),
+ req->best_parent_rate);
+
+ if (best_rate < 0)
+ return best_rate;
+
+ req->rate = best_rate;
+
+ return 0;
+}
+
+static int isc_clk_set_parent(struct clk_hw *hw, u8 index)
+{
+ struct isc_clk *isc_clk = to_isc_clk(hw);
+
+ if (index >= clk_hw_get_num_parents(hw))
+ return -EINVAL;
+
+ isc_clk->parent_id = index;
+
+ return 0;
+}
+
+static u8 isc_clk_get_parent(struct clk_hw *hw)
+{
+ struct isc_clk *isc_clk = to_isc_clk(hw);
+
+ return isc_clk->parent_id;
+}
+
+static int isc_clk_set_rate(struct clk_hw *hw,
+ unsigned long rate,
+ unsigned long parent_rate)
+{
+ struct isc_clk *isc_clk = to_isc_clk(hw);
+ u32 div;
+
+ if (!rate)
+ return -EINVAL;
+
+ div = DIV_ROUND_CLOSEST(parent_rate, rate);
+ if (div > (ISC_CLK_MAX_DIV + 1) || !div)
+ return -EINVAL;
+
+ isc_clk->div = div - 1;
+
+ return 0;
+}
+
+static const struct clk_ops isc_clk_ops = {
+ .prepare = isc_clk_prepare,
+ .unprepare = isc_clk_unprepare,
+ .enable = isc_clk_enable,
+ .disable = isc_clk_disable,
+ .is_enabled = isc_clk_is_enabled,
+ .recalc_rate = isc_clk_recalc_rate,
+ .determine_rate = isc_clk_determine_rate,
+ .set_parent = isc_clk_set_parent,
+ .get_parent = isc_clk_get_parent,
+ .set_rate = isc_clk_set_rate,
+};
+
+static int isc_clk_register(struct isc_device *isc, unsigned int id)
+{
+ struct regmap *regmap = isc->regmap;
+ struct device_node *np = isc->dev->of_node;
+ struct isc_clk *isc_clk;
+ struct clk_init_data init;
+ const char *clk_name = np->name;
+ const char *parent_names[3];
+ int num_parents;
+
+ num_parents = of_clk_get_parent_count(np);
+ if (num_parents < 1 || num_parents > 3)
+ return -EINVAL;
+
+ if (num_parents > 2 && id == ISC_ISPCK)
+ num_parents = 2;
+
+ of_clk_parent_fill(np, parent_names, num_parents);
+
+ if (id == ISC_MCK)
+ of_property_read_string(np, "clock-output-names", &clk_name);
+ else
+ clk_name = "isc-ispck";
+
+ init.parent_names = parent_names;
+ init.num_parents = num_parents;
+ init.name = clk_name;
+ init.ops = &isc_clk_ops;
+ init.flags = CLK_SET_RATE_GATE | CLK_SET_PARENT_GATE;
+
+ isc_clk = &isc->isc_clks[id];
+ isc_clk->hw.init = &init;
+ isc_clk->regmap = regmap;
+ isc_clk->id = id;
+ isc_clk->dev = isc->dev;
+ spin_lock_init(&isc_clk->lock);
+
+ isc_clk->clk = clk_register(isc->dev, &isc_clk->hw);
+ if (IS_ERR(isc_clk->clk)) {
+ dev_err(isc->dev, "%s: clock register fail\n", clk_name);
+ return PTR_ERR(isc_clk->clk);
+ } else if (id == ISC_MCK)
+ of_clk_add_provider(np, of_clk_src_simple_get, isc_clk->clk);
+
+ return 0;
+}
+
+int isc_clk_init(struct isc_device *isc)
+{
+ unsigned int i;
+ int ret;
+
+ for (i = 0; i < ARRAY_SIZE(isc->isc_clks); i++)
+ isc->isc_clks[i].clk = ERR_PTR(-EINVAL);
+
+ for (i = 0; i < ARRAY_SIZE(isc->isc_clks); i++) {
+ ret = isc_clk_register(isc, i);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+void isc_clk_cleanup(struct isc_device *isc)
+{
+ unsigned int i;
+
+ of_clk_del_provider(isc->dev->of_node);
+
+ for (i = 0; i < ARRAY_SIZE(isc->isc_clks); i++) {
+ struct isc_clk *isc_clk = &isc->isc_clks[i];
+
+ if (!IS_ERR(isc_clk->clk))
+ clk_unregister(isc_clk->clk);
+ }
+}
+
+static int isc_queue_setup(struct vb2_queue *vq,
+ unsigned int *nbuffers, unsigned int *nplanes,
+ unsigned int sizes[], struct device *alloc_devs[])
+{
+ struct isc_device *isc = vb2_get_drv_priv(vq);
+ unsigned int size = isc->fmt.fmt.pix.sizeimage;
+
+ if (*nplanes)
+ return sizes[0] < size ? -EINVAL : 0;
+
+ *nplanes = 1;
+ sizes[0] = size;
+
+ return 0;
+}
+
+static int isc_buffer_prepare(struct vb2_buffer *vb)
+{
+ struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+ struct isc_device *isc = vb2_get_drv_priv(vb->vb2_queue);
+ unsigned long size = isc->fmt.fmt.pix.sizeimage;
+
+ if (vb2_plane_size(vb, 0) < size) {
+ v4l2_err(&isc->v4l2_dev, "buffer too small (%lu < %lu)\n",
+ vb2_plane_size(vb, 0), size);
+ return -EINVAL;
+ }
+
+ vb2_set_plane_payload(vb, 0, size);
+
+ vbuf->field = isc->fmt.fmt.pix.field;
+
+ return 0;
+}
+
+static void isc_start_dma(struct isc_device *isc)
+{
+ struct regmap *regmap = isc->regmap;
+ u32 sizeimage = isc->fmt.fmt.pix.sizeimage;
+ u32 dctrl_dview;
+ dma_addr_t addr0;
+ u32 h, w;
+
+ h = isc->fmt.fmt.pix.height;
+ w = isc->fmt.fmt.pix.width;
+
+ /*
+ * In case the sensor is not RAW, it will output a pixel (12-16 bits)
+ * with two samples on the ISC Data bus (which is 8-12)
+ * ISC will count each sample, so, we need to multiply these values
+ * by two, to get the real number of samples for the required pixels.
+ */
+ if (!ISC_IS_FORMAT_RAW(isc->config.sd_format->mbus_code)) {
+ h <<= 1;
+ w <<= 1;
+ }
+
+ /*
+ * We limit the column/row count that the ISC will output according
+ * to the configured resolution that we want.
+ * This will avoid the situation where the sensor is misconfigured,
+ * sending more data, and the ISC will just take it and DMA to memory,
+ * causing corruption.
+ */
+ regmap_write(regmap, ISC_PFE_CFG1,
+ (ISC_PFE_CFG1_COLMIN(0) & ISC_PFE_CFG1_COLMIN_MASK) |
+ (ISC_PFE_CFG1_COLMAX(w - 1) & ISC_PFE_CFG1_COLMAX_MASK));
+
+ regmap_write(regmap, ISC_PFE_CFG2,
+ (ISC_PFE_CFG2_ROWMIN(0) & ISC_PFE_CFG2_ROWMIN_MASK) |
+ (ISC_PFE_CFG2_ROWMAX(h - 1) & ISC_PFE_CFG2_ROWMAX_MASK));
+
+ regmap_update_bits(regmap, ISC_PFE_CFG0,
+ ISC_PFE_CFG0_COLEN | ISC_PFE_CFG0_ROWEN,
+ ISC_PFE_CFG0_COLEN | ISC_PFE_CFG0_ROWEN);
+
+ addr0 = vb2_dma_contig_plane_dma_addr(&isc->cur_frm->vb.vb2_buf, 0);
+ regmap_write(regmap, ISC_DAD0, addr0);
+
+ switch (isc->config.fourcc) {
+ case V4L2_PIX_FMT_YUV420:
+ regmap_write(regmap, ISC_DAD1, addr0 + (sizeimage * 2) / 3);
+ regmap_write(regmap, ISC_DAD2, addr0 + (sizeimage * 5) / 6);
+ break;
+ case V4L2_PIX_FMT_YUV422P:
+ regmap_write(regmap, ISC_DAD1, addr0 + sizeimage / 2);
+ regmap_write(regmap, ISC_DAD2, addr0 + (sizeimage * 3) / 4);
+ break;
+ default:
+ break;
+ }
+
+ dctrl_dview = isc->config.dctrl_dview;
+
+ regmap_write(regmap, ISC_DCTRL, dctrl_dview | ISC_DCTRL_IE_IS);
+ spin_lock(&isc->awb_lock);
+ regmap_write(regmap, ISC_CTRLEN, ISC_CTRL_CAPTURE);
+ spin_unlock(&isc->awb_lock);
+}
+
+static void isc_set_pipeline(struct isc_device *isc, u32 pipeline)
+{
+ struct regmap *regmap = isc->regmap;
+ struct isc_ctrls *ctrls = &isc->ctrls;
+ u32 val, bay_cfg;
+ const u32 *gamma;
+ unsigned int i;
+
+ /* WB-->CFA-->CC-->GAM-->CSC-->CBC-->SUB422-->SUB420 */
+ for (i = 0; i < ISC_PIPE_LINE_NODE_NUM; i++) {
+ val = pipeline & BIT(i) ? 1 : 0;
+ regmap_field_write(isc->pipeline[i], val);
+ }
+
+ if (!pipeline)
+ return;
+
+ bay_cfg = isc->config.sd_format->cfa_baycfg;
+
+ if (ctrls->awb == ISC_WB_NONE)
+ isc_reset_awb_ctrls(isc);
+
+ regmap_write(regmap, ISC_WB_CFG, bay_cfg);
+ isc_update_awb_ctrls(isc);
+
+ regmap_write(regmap, ISC_CFA_CFG, bay_cfg | ISC_CFA_CFG_EITPOL);
+
+ gamma = &isc_gamma_table[ctrls->gamma_index][0];
+ regmap_bulk_write(regmap, ISC_GAM_BENTRY, gamma, GAMMA_ENTRIES);
+ regmap_bulk_write(regmap, ISC_GAM_GENTRY, gamma, GAMMA_ENTRIES);
+ regmap_bulk_write(regmap, ISC_GAM_RENTRY, gamma, GAMMA_ENTRIES);
+
+ /* Convert RGB to YUV */
+ regmap_write(regmap, ISC_CSC_YR_YG, 0x42 | (0x81 << 16));
+ regmap_write(regmap, ISC_CSC_YB_OY, 0x19 | (0x10 << 16));
+ regmap_write(regmap, ISC_CSC_CBR_CBG, 0xFDA | (0xFB6 << 16));
+ regmap_write(regmap, ISC_CSC_CBB_OCB, 0x70 | (0x80 << 16));
+ regmap_write(regmap, ISC_CSC_CRR_CRG, 0x70 | (0xFA2 << 16));
+ regmap_write(regmap, ISC_CSC_CRB_OCR, 0xFEE | (0x80 << 16));
+
+ regmap_write(regmap, ISC_CBC_BRIGHT, ctrls->brightness);
+ regmap_write(regmap, ISC_CBC_CONTRAST, ctrls->contrast);
+}
+
+static int isc_update_profile(struct isc_device *isc)
+{
+ struct regmap *regmap = isc->regmap;
+ u32 sr;
+ int counter = 100;
+
+ regmap_write(regmap, ISC_CTRLEN, ISC_CTRL_UPPRO);
+
+ regmap_read(regmap, ISC_CTRLSR, &sr);
+ while ((sr & ISC_CTRL_UPPRO) && counter--) {
+ usleep_range(1000, 2000);
+ regmap_read(regmap, ISC_CTRLSR, &sr);
+ }
+
+ if (counter < 0) {
+ v4l2_warn(&isc->v4l2_dev, "Time out to update profile\n");
+ return -ETIMEDOUT;
+ }
+
+ return 0;
+}
+
+static void isc_set_histogram(struct isc_device *isc, bool enable)
+{
+ struct regmap *regmap = isc->regmap;
+ struct isc_ctrls *ctrls = &isc->ctrls;
+
+ if (enable) {
+ regmap_write(regmap, ISC_HIS_CFG,
+ ISC_HIS_CFG_MODE_GR |
+ (isc->config.sd_format->cfa_baycfg
+ << ISC_HIS_CFG_BAYSEL_SHIFT) |
+ ISC_HIS_CFG_RAR);
+ regmap_write(regmap, ISC_HIS_CTRL, ISC_HIS_CTRL_EN);
+ regmap_write(regmap, ISC_INTEN, ISC_INT_HISDONE);
+ ctrls->hist_id = ISC_HIS_CFG_MODE_GR;
+ isc_update_profile(isc);
+ regmap_write(regmap, ISC_CTRLEN, ISC_CTRL_HISREQ);
+
+ ctrls->hist_stat = HIST_ENABLED;
+ } else {
+ regmap_write(regmap, ISC_INTDIS, ISC_INT_HISDONE);
+ regmap_write(regmap, ISC_HIS_CTRL, ISC_HIS_CTRL_DIS);
+
+ ctrls->hist_stat = HIST_DISABLED;
+ }
+}
+
+static int isc_configure(struct isc_device *isc)
+{
+ struct regmap *regmap = isc->regmap;
+ u32 pfe_cfg0, rlp_mode, dcfg, mask, pipeline;
+ struct isc_subdev_entity *subdev = isc->current_subdev;
+
+ pfe_cfg0 = isc->config.sd_format->pfe_cfg0_bps;
+ rlp_mode = isc->config.rlp_cfg_mode;
+ pipeline = isc->config.bits_pipeline;
+
+ dcfg = isc->config.dcfg_imode |
+ ISC_DCFG_YMBSIZE_BEATS8 | ISC_DCFG_CMBSIZE_BEATS8;
+
+ pfe_cfg0 |= subdev->pfe_cfg0 | ISC_PFE_CFG0_MODE_PROGRESSIVE;
+ mask = ISC_PFE_CFG0_BPS_MASK | ISC_PFE_CFG0_HPOL_LOW |
+ ISC_PFE_CFG0_VPOL_LOW | ISC_PFE_CFG0_PPOL_LOW |
+ ISC_PFE_CFG0_MODE_MASK | ISC_PFE_CFG0_CCIR_CRC |
+ ISC_PFE_CFG0_CCIR656;
+
+ regmap_update_bits(regmap, ISC_PFE_CFG0, mask, pfe_cfg0);
+
+ regmap_update_bits(regmap, ISC_RLP_CFG, ISC_RLP_CFG_MODE_MASK,
+ rlp_mode);
+
+ regmap_write(regmap, ISC_DCFG, dcfg);
+
+ /* Set the pipeline */
+ isc_set_pipeline(isc, pipeline);
+
+ /*
+ * The current implemented histogram is available for RAW R, B, GB, GR
+ * channels. We need to check if sensor is outputting RAW BAYER
+ */
+ if (isc->ctrls.awb &&
+ ISC_IS_FORMAT_RAW(isc->config.sd_format->mbus_code))
+ isc_set_histogram(isc, true);
+ else
+ isc_set_histogram(isc, false);
+
+ /* Update profile */
+ return isc_update_profile(isc);
+}
+
+static int isc_start_streaming(struct vb2_queue *vq, unsigned int count)
+{
+ struct isc_device *isc = vb2_get_drv_priv(vq);
+ struct regmap *regmap = isc->regmap;
+ struct isc_buffer *buf;
+ unsigned long flags;
+ int ret;
+
+ /* Enable stream on the sub device */
+ ret = v4l2_subdev_call(isc->current_subdev->sd, video, s_stream, 1);
+ if (ret && ret != -ENOIOCTLCMD) {
+ v4l2_err(&isc->v4l2_dev, "stream on failed in subdev %d\n",
+ ret);
+ goto err_start_stream;
+ }
+
+ pm_runtime_get_sync(isc->dev);
+
+ ret = isc_configure(isc);
+ if (unlikely(ret))
+ goto err_configure;
+
+ /* Enable DMA interrupt */
+ regmap_write(regmap, ISC_INTEN, ISC_INT_DDONE);
+
+ spin_lock_irqsave(&isc->dma_queue_lock, flags);
+
+ isc->sequence = 0;
+ isc->stop = false;
+ reinit_completion(&isc->comp);
+
+ isc->cur_frm = list_first_entry(&isc->dma_queue,
+ struct isc_buffer, list);
+ list_del(&isc->cur_frm->list);
+
+ isc_start_dma(isc);
+
+ spin_unlock_irqrestore(&isc->dma_queue_lock, flags);
+
+ /* if we streaming from RAW, we can do one-shot white balance adj */
+ if (ISC_IS_FORMAT_RAW(isc->config.sd_format->mbus_code))
+ v4l2_ctrl_activate(isc->do_wb_ctrl, true);
+
+ return 0;
+
+err_configure:
+ pm_runtime_put_sync(isc->dev);
+
+ v4l2_subdev_call(isc->current_subdev->sd, video, s_stream, 0);
+
+err_start_stream:
+ spin_lock_irqsave(&isc->dma_queue_lock, flags);
+ list_for_each_entry(buf, &isc->dma_queue, list)
+ vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_QUEUED);
+ INIT_LIST_HEAD(&isc->dma_queue);
+ spin_unlock_irqrestore(&isc->dma_queue_lock, flags);
+
+ return ret;
+}
+
+static void isc_stop_streaming(struct vb2_queue *vq)
+{
+ struct isc_device *isc = vb2_get_drv_priv(vq);
+ unsigned long flags;
+ struct isc_buffer *buf;
+ int ret;
+
+ v4l2_ctrl_activate(isc->do_wb_ctrl, false);
+
+ isc->stop = true;
+
+ /* Wait until the end of the current frame */
+ if (isc->cur_frm && !wait_for_completion_timeout(&isc->comp, 5 * HZ))
+ v4l2_err(&isc->v4l2_dev,
+ "Timeout waiting for end of the capture\n");
+
+ /* Disable DMA interrupt */
+ regmap_write(isc->regmap, ISC_INTDIS, ISC_INT_DDONE);
+
+ pm_runtime_put_sync(isc->dev);
+
+ /* Disable stream on the sub device */
+ ret = v4l2_subdev_call(isc->current_subdev->sd, video, s_stream, 0);
+ if (ret && ret != -ENOIOCTLCMD)
+ v4l2_err(&isc->v4l2_dev, "stream off failed in subdev\n");
+
+ /* Release all active buffers */
+ spin_lock_irqsave(&isc->dma_queue_lock, flags);
+ if (unlikely(isc->cur_frm)) {
+ vb2_buffer_done(&isc->cur_frm->vb.vb2_buf,
+ VB2_BUF_STATE_ERROR);
+ isc->cur_frm = NULL;
+ }
+ list_for_each_entry(buf, &isc->dma_queue, list)
+ vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
+ INIT_LIST_HEAD(&isc->dma_queue);
+ spin_unlock_irqrestore(&isc->dma_queue_lock, flags);
+}
+
+static void isc_buffer_queue(struct vb2_buffer *vb)
+{
+ struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+ struct isc_buffer *buf = container_of(vbuf, struct isc_buffer, vb);
+ struct isc_device *isc = vb2_get_drv_priv(vb->vb2_queue);
+ unsigned long flags;
+
+ spin_lock_irqsave(&isc->dma_queue_lock, flags);
+ if (!isc->cur_frm && list_empty(&isc->dma_queue) &&
+ vb2_is_streaming(vb->vb2_queue)) {
+ isc->cur_frm = buf;
+ isc_start_dma(isc);
+ } else
+ list_add_tail(&buf->list, &isc->dma_queue);
+ spin_unlock_irqrestore(&isc->dma_queue_lock, flags);
+}
+
+static struct isc_format *find_format_by_fourcc(struct isc_device *isc,
+ unsigned int fourcc)
+{
+ unsigned int num_formats = isc->num_user_formats;
+ struct isc_format *fmt;
+ unsigned int i;
+
+ for (i = 0; i < num_formats; i++) {
+ fmt = isc->user_formats[i];
+ if (fmt->fourcc == fourcc)
+ return fmt;
+ }
+
+ return NULL;
+}
+
+static const struct vb2_ops isc_vb2_ops = {
+ .queue_setup = isc_queue_setup,
+ .wait_prepare = vb2_ops_wait_prepare,
+ .wait_finish = vb2_ops_wait_finish,
+ .buf_prepare = isc_buffer_prepare,
+ .start_streaming = isc_start_streaming,
+ .stop_streaming = isc_stop_streaming,
+ .buf_queue = isc_buffer_queue,
+};
+
+static int isc_querycap(struct file *file, void *priv,
+ struct v4l2_capability *cap)
+{
+ struct isc_device *isc = video_drvdata(file);
+
+ strscpy(cap->driver, ATMEL_ISC_NAME, sizeof(cap->driver));
+ strscpy(cap->card, "Atmel Image Sensor Controller", sizeof(cap->card));
+ snprintf(cap->bus_info, sizeof(cap->bus_info),
+ "platform:%s", isc->v4l2_dev.name);
+
+ return 0;
+}
+
+static int isc_enum_fmt_vid_cap(struct file *file, void *priv,
+ struct v4l2_fmtdesc *f)
+{
+ u32 index = f->index;
+ u32 i, supported_index;
+
+ if (index < ARRAY_SIZE(controller_formats)) {
+ f->pixelformat = controller_formats[index].fourcc;
+ return 0;
+ }
+
+ index -= ARRAY_SIZE(controller_formats);
+
+ i = 0;
+ supported_index = 0;
+
+ for (i = 0; i < ARRAY_SIZE(formats_list); i++) {
+ if (!ISC_IS_FORMAT_RAW(formats_list[i].mbus_code) ||
+ !formats_list[i].sd_support)
+ continue;
+ if (supported_index == index) {
+ f->pixelformat = formats_list[i].fourcc;
+ return 0;
+ }
+ supported_index++;
+ }
+
+ return -EINVAL;
+}
+
+static int isc_g_fmt_vid_cap(struct file *file, void *priv,
+ struct v4l2_format *fmt)
+{
+ struct isc_device *isc = video_drvdata(file);
+
+ *fmt = isc->fmt;
+
+ return 0;
+}
+
+/*
+ * Checks the current configured format, if ISC can output it,
+ * considering which type of format the ISC receives from the sensor
+ */
+static int isc_try_validate_formats(struct isc_device *isc)
+{
+ int ret;
+ bool bayer = false, yuv = false, rgb = false, grey = false;
+
+ /* all formats supported by the RLP module are OK */
+ switch (isc->try_config.fourcc) {
+ case V4L2_PIX_FMT_SBGGR8:
+ case V4L2_PIX_FMT_SGBRG8:
+ case V4L2_PIX_FMT_SGRBG8:
+ case V4L2_PIX_FMT_SRGGB8:
+ case V4L2_PIX_FMT_SBGGR10:
+ case V4L2_PIX_FMT_SGBRG10:
+ case V4L2_PIX_FMT_SGRBG10:
+ case V4L2_PIX_FMT_SRGGB10:
+ case V4L2_PIX_FMT_SBGGR12:
+ case V4L2_PIX_FMT_SGBRG12:
+ case V4L2_PIX_FMT_SGRBG12:
+ case V4L2_PIX_FMT_SRGGB12:
+ ret = 0;
+ bayer = true;
+ break;
+
+ case V4L2_PIX_FMT_YUV420:
+ case V4L2_PIX_FMT_YUV422P:
+ case V4L2_PIX_FMT_YUYV:
+ ret = 0;
+ yuv = true;
+ break;
+
+ case V4L2_PIX_FMT_RGB565:
+ case V4L2_PIX_FMT_ABGR32:
+ case V4L2_PIX_FMT_XBGR32:
+ case V4L2_PIX_FMT_ARGB444:
+ case V4L2_PIX_FMT_ARGB555:
+ ret = 0;
+ rgb = true;
+ break;
+ case V4L2_PIX_FMT_GREY:
+ ret = 0;
+ grey = true;
+ break;
+ default:
+ /* any other different formats are not supported */
+ ret = -EINVAL;
+ }
+
+ /* we cannot output RAW/Grey if we do not receive RAW */
+ if ((bayer || grey) &&
+ !ISC_IS_FORMAT_RAW(isc->try_config.sd_format->mbus_code))
+ return -EINVAL;
+
+ v4l2_dbg(1, debug, &isc->v4l2_dev,
+ "Format validation, requested rgb=%u, yuv=%u, grey=%u, bayer=%u\n",
+ rgb, yuv, grey, bayer);
+
+ return ret;
+}
+
+/*
+ * Configures the RLP and DMA modules, depending on the output format
+ * configured for the ISC.
+ * If direct_dump == true, just dump raw data 8 bits.
+ */
+static int isc_try_configure_rlp_dma(struct isc_device *isc, bool direct_dump)
+{
+ if (direct_dump) {
+ isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_DAT8;
+ isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED8;
+ isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED;
+ isc->try_config.bpp = 16;
+ return 0;
+ }
+
+ switch (isc->try_config.fourcc) {
+ case V4L2_PIX_FMT_SBGGR8:
+ case V4L2_PIX_FMT_SGBRG8:
+ case V4L2_PIX_FMT_SGRBG8:
+ case V4L2_PIX_FMT_SRGGB8:
+ isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_DAT8;
+ isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED8;
+ isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED;
+ isc->try_config.bpp = 8;
+ break;
+ case V4L2_PIX_FMT_SBGGR10:
+ case V4L2_PIX_FMT_SGBRG10:
+ case V4L2_PIX_FMT_SGRBG10:
+ case V4L2_PIX_FMT_SRGGB10:
+ isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_DAT10;
+ isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED16;
+ isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED;
+ isc->try_config.bpp = 16;
+ break;
+ case V4L2_PIX_FMT_SBGGR12:
+ case V4L2_PIX_FMT_SGBRG12:
+ case V4L2_PIX_FMT_SGRBG12:
+ case V4L2_PIX_FMT_SRGGB12:
+ isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_DAT12;
+ isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED16;
+ isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED;
+ isc->try_config.bpp = 16;
+ break;
+ case V4L2_PIX_FMT_RGB565:
+ isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_RGB565;
+ isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED16;
+ isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED;
+ isc->try_config.bpp = 16;
+ break;
+ case V4L2_PIX_FMT_ARGB444:
+ isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_ARGB444;
+ isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED16;
+ isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED;
+ isc->try_config.bpp = 16;
+ break;
+ case V4L2_PIX_FMT_ARGB555:
+ isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_ARGB555;
+ isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED16;
+ isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED;
+ isc->try_config.bpp = 16;
+ break;
+ case V4L2_PIX_FMT_ABGR32:
+ case V4L2_PIX_FMT_XBGR32:
+ isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_ARGB32;
+ isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED32;
+ isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED;
+ isc->try_config.bpp = 32;
+ break;
+ case V4L2_PIX_FMT_YUV420:
+ isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_YYCC;
+ isc->try_config.dcfg_imode = ISC_DCFG_IMODE_YC420P;
+ isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PLANAR;
+ isc->try_config.bpp = 12;
+ break;
+ case V4L2_PIX_FMT_YUV422P:
+ isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_YYCC;
+ isc->try_config.dcfg_imode = ISC_DCFG_IMODE_YC422P;
+ isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PLANAR;
+ isc->try_config.bpp = 16;
+ break;
+ case V4L2_PIX_FMT_YUYV:
+ isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_YYCC;
+ isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED32;
+ isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED;
+ isc->try_config.bpp = 16;
+ break;
+ case V4L2_PIX_FMT_GREY:
+ isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_DATY8;
+ isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED8;
+ isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED;
+ isc->try_config.bpp = 8;
+ break;
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+
+/*
+ * Configuring pipeline modules, depending on which format the ISC outputs
+ * and considering which format it has as input from the sensor.
+ */
+static int isc_try_configure_pipeline(struct isc_device *isc)
+{
+ switch (isc->try_config.fourcc) {
+ case V4L2_PIX_FMT_RGB565:
+ case V4L2_PIX_FMT_ARGB555:
+ case V4L2_PIX_FMT_ARGB444:
+ case V4L2_PIX_FMT_ABGR32:
+ case V4L2_PIX_FMT_XBGR32:
+ /* if sensor format is RAW, we convert inside ISC */
+ if (ISC_IS_FORMAT_RAW(isc->try_config.sd_format->mbus_code)) {
+ isc->try_config.bits_pipeline = CFA_ENABLE |
+ WB_ENABLE | GAM_ENABLES;
+ } else {
+ isc->try_config.bits_pipeline = 0x0;
+ }
+ break;
+ case V4L2_PIX_FMT_YUV420:
+ /* if sensor format is RAW, we convert inside ISC */
+ if (ISC_IS_FORMAT_RAW(isc->try_config.sd_format->mbus_code)) {
+ isc->try_config.bits_pipeline = CFA_ENABLE |
+ CSC_ENABLE | WB_ENABLE | GAM_ENABLES |
+ SUB420_ENABLE | SUB422_ENABLE | CBC_ENABLE;
+ } else {
+ isc->try_config.bits_pipeline = 0x0;
+ }
+ break;
+ case V4L2_PIX_FMT_YUV422P:
+ /* if sensor format is RAW, we convert inside ISC */
+ if (ISC_IS_FORMAT_RAW(isc->try_config.sd_format->mbus_code)) {
+ isc->try_config.bits_pipeline = CFA_ENABLE |
+ CSC_ENABLE | WB_ENABLE | GAM_ENABLES |
+ SUB422_ENABLE | CBC_ENABLE;
+ } else {
+ isc->try_config.bits_pipeline = 0x0;
+ }
+ break;
+ case V4L2_PIX_FMT_YUYV:
+ /* if sensor format is RAW, we convert inside ISC */
+ if (ISC_IS_FORMAT_RAW(isc->try_config.sd_format->mbus_code)) {
+ isc->try_config.bits_pipeline = CFA_ENABLE |
+ CSC_ENABLE | WB_ENABLE | GAM_ENABLES |
+ SUB422_ENABLE | CBC_ENABLE;
+ } else {
+ isc->try_config.bits_pipeline = 0x0;
+ }
+ break;
+ case V4L2_PIX_FMT_GREY:
+ if (ISC_IS_FORMAT_RAW(isc->try_config.sd_format->mbus_code)) {
+ /* if sensor format is RAW, we convert inside ISC */
+ isc->try_config.bits_pipeline = CFA_ENABLE |
+ CSC_ENABLE | WB_ENABLE | GAM_ENABLES |
+ CBC_ENABLE;
+ } else {
+ isc->try_config.bits_pipeline = 0x0;
+ }
+ break;
+ default:
+ isc->try_config.bits_pipeline = 0x0;
+ }
+ return 0;
+}
+
+static int isc_try_fmt(struct isc_device *isc, struct v4l2_format *f,
+ u32 *code)
+{
+ int i;
+ struct isc_format *sd_fmt = NULL, *direct_fmt = NULL;
+ struct v4l2_pix_format *pixfmt = &f->fmt.pix;
+ struct v4l2_subdev_pad_config pad_cfg;
+ struct v4l2_subdev_format format = {
+ .which = V4L2_SUBDEV_FORMAT_TRY,
+ };
+ u32 mbus_code;
+ int ret;
+ bool rlp_dma_direct_dump = false;
+
+ if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ return -EINVAL;
+
+ /* Step 1: find a RAW format that is supported */
+ for (i = 0; i < isc->num_user_formats; i++) {
+ if (ISC_IS_FORMAT_RAW(isc->user_formats[i]->mbus_code)) {
+ sd_fmt = isc->user_formats[i];
+ break;
+ }
+ }
+ /* Step 2: We can continue with this RAW format, or we can look
+ * for better: maybe sensor supports directly what we need.
+ */
+ direct_fmt = find_format_by_fourcc(isc, pixfmt->pixelformat);
+
+ /* Step 3: We have both. We decide given the module parameter which
+ * one to use.
+ */
+ if (direct_fmt && sd_fmt && sensor_preferred)
+ sd_fmt = direct_fmt;
+
+ /* Step 4: we do not have RAW but we have a direct format. Use it. */
+ if (direct_fmt && !sd_fmt)
+ sd_fmt = direct_fmt;
+
+ /* Step 5: if we are using a direct format, we need to package
+ * everything as 8 bit data and just dump it
+ */
+ if (sd_fmt == direct_fmt)
+ rlp_dma_direct_dump = true;
+
+ /* Step 6: We have no format. This can happen if the userspace
+ * requests some weird/invalid format.
+ * In this case, default to whatever we have
+ */
+ if (!sd_fmt && !direct_fmt) {
+ sd_fmt = isc->user_formats[isc->num_user_formats - 1];
+ v4l2_dbg(1, debug, &isc->v4l2_dev,
+ "Sensor not supporting %.4s, using %.4s\n",
+ (char *)&pixfmt->pixelformat, (char *)&sd_fmt->fourcc);
+ }
+
+ if (!sd_fmt) {
+ ret = -EINVAL;
+ goto isc_try_fmt_err;
+ }
+
+ /* Step 7: Print out what we decided for debugging */
+ v4l2_dbg(1, debug, &isc->v4l2_dev,
+ "Preferring to have sensor using format %.4s\n",
+ (char *)&sd_fmt->fourcc);
+
+ /* Step 8: at this moment we decided which format the subdev will use */
+ isc->try_config.sd_format = sd_fmt;
+
+ /* Limit to Atmel ISC hardware capabilities */
+ if (pixfmt->width > ISC_MAX_SUPPORT_WIDTH)
+ pixfmt->width = ISC_MAX_SUPPORT_WIDTH;
+ if (pixfmt->height > ISC_MAX_SUPPORT_HEIGHT)
+ pixfmt->height = ISC_MAX_SUPPORT_HEIGHT;
+
+ /*
+ * The mbus format is the one the subdev outputs.
+ * The pixels will be transferred in this format Sensor -> ISC
+ */
+ mbus_code = sd_fmt->mbus_code;
+
+ /*
+ * Validate formats. If the required format is not OK, default to raw.
+ */
+
+ isc->try_config.fourcc = pixfmt->pixelformat;
+
+ if (isc_try_validate_formats(isc)) {
+ pixfmt->pixelformat = isc->try_config.fourcc = sd_fmt->fourcc;
+ /* Re-try to validate the new format */
+ ret = isc_try_validate_formats(isc);
+ if (ret)
+ goto isc_try_fmt_err;
+ }
+
+ ret = isc_try_configure_rlp_dma(isc, rlp_dma_direct_dump);
+ if (ret)
+ goto isc_try_fmt_err;
+
+ ret = isc_try_configure_pipeline(isc);
+ if (ret)
+ goto isc_try_fmt_err;
+
+ v4l2_fill_mbus_format(&format.format, pixfmt, mbus_code);
+ ret = v4l2_subdev_call(isc->current_subdev->sd, pad, set_fmt,
+ &pad_cfg, &format);
+ if (ret < 0)
+ goto isc_try_fmt_subdev_err;
+
+ v4l2_fill_pix_format(pixfmt, &format.format);
+
+ pixfmt->field = V4L2_FIELD_NONE;
+ pixfmt->bytesperline = (pixfmt->width * isc->try_config.bpp) >> 3;
+ pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
+
+ if (code)
+ *code = mbus_code;
+
+ return 0;
+
+isc_try_fmt_err:
+ v4l2_err(&isc->v4l2_dev, "Could not find any possible format for a working pipeline\n");
+isc_try_fmt_subdev_err:
+ memset(&isc->try_config, 0, sizeof(isc->try_config));
+
+ return ret;
+}
+
+static int isc_set_fmt(struct isc_device *isc, struct v4l2_format *f)
+{
+ struct v4l2_subdev_format format = {
+ .which = V4L2_SUBDEV_FORMAT_ACTIVE,
+ };
+ u32 mbus_code = 0;
+ int ret;
+
+ ret = isc_try_fmt(isc, f, &mbus_code);
+ if (ret)
+ return ret;
+
+ v4l2_fill_mbus_format(&format.format, &f->fmt.pix, mbus_code);
+ ret = v4l2_subdev_call(isc->current_subdev->sd, pad,
+ set_fmt, NULL, &format);
+ if (ret < 0)
+ return ret;
+
+ isc->fmt = *f;
+
+ if (isc->try_config.sd_format && isc->config.sd_format &&
+ isc->try_config.sd_format != isc->config.sd_format) {
+ isc->ctrls.hist_stat = HIST_INIT;
+ isc_reset_awb_ctrls(isc);
+ }
+ /* make the try configuration active */
+ isc->config = isc->try_config;
+
+ v4l2_dbg(1, debug, &isc->v4l2_dev, "New ISC configuration in place\n");
+
+ return 0;
+}
+
+static int isc_s_fmt_vid_cap(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct isc_device *isc = video_drvdata(file);
+
+ if (vb2_is_streaming(&isc->vb2_vidq))
+ return -EBUSY;
+
+ return isc_set_fmt(isc, f);
+}
+
+static int isc_try_fmt_vid_cap(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct isc_device *isc = video_drvdata(file);
+
+ return isc_try_fmt(isc, f, NULL);
+}
+
+static int isc_enum_input(struct file *file, void *priv,
+ struct v4l2_input *inp)
+{
+ if (inp->index != 0)
+ return -EINVAL;
+
+ inp->type = V4L2_INPUT_TYPE_CAMERA;
+ inp->std = 0;
+ strscpy(inp->name, "Camera", sizeof(inp->name));
+
+ return 0;
+}
+
+static int isc_g_input(struct file *file, void *priv, unsigned int *i)
+{
+ *i = 0;
+
+ return 0;
+}
+
+static int isc_s_input(struct file *file, void *priv, unsigned int i)
+{
+ if (i > 0)
+ return -EINVAL;
+
+ return 0;
+}
+
+static int isc_g_parm(struct file *file, void *fh, struct v4l2_streamparm *a)
+{
+ struct isc_device *isc = video_drvdata(file);
+
+ return v4l2_g_parm_cap(video_devdata(file), isc->current_subdev->sd, a);
+}
+
+static int isc_s_parm(struct file *file, void *fh, struct v4l2_streamparm *a)
+{
+ struct isc_device *isc = video_drvdata(file);
+
+ return v4l2_s_parm_cap(video_devdata(file), isc->current_subdev->sd, a);
+}
+
+static int isc_enum_framesizes(struct file *file, void *fh,
+ struct v4l2_frmsizeenum *fsize)
+{
+ struct isc_device *isc = video_drvdata(file);
+ struct v4l2_subdev_frame_size_enum fse = {
+ .index = fsize->index,
+ .which = V4L2_SUBDEV_FORMAT_ACTIVE,
+ };
+ int ret = -EINVAL;
+ int i;
+
+ for (i = 0; i < isc->num_user_formats; i++)
+ if (isc->user_formats[i]->fourcc == fsize->pixel_format)
+ ret = 0;
+
+ for (i = 0; i < ARRAY_SIZE(controller_formats); i++)
+ if (controller_formats[i].fourcc == fsize->pixel_format)
+ ret = 0;
+
+ if (ret)
+ return ret;
+
+ ret = v4l2_subdev_call(isc->current_subdev->sd, pad, enum_frame_size,
+ NULL, &fse);
+ if (ret)
+ return ret;
+
+ fse.code = isc->config.sd_format->mbus_code;
+
+ fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
+ fsize->discrete.width = fse.max_width;
+ fsize->discrete.height = fse.max_height;
+
+ return 0;
+}
+
+static int isc_enum_frameintervals(struct file *file, void *fh,
+ struct v4l2_frmivalenum *fival)
+{
+ struct isc_device *isc = video_drvdata(file);
+ struct v4l2_subdev_frame_interval_enum fie = {
+ .index = fival->index,
+ .width = fival->width,
+ .height = fival->height,
+ .which = V4L2_SUBDEV_FORMAT_ACTIVE,
+ };
+ int ret = -EINVAL;
+ int i;
+
+ for (i = 0; i < isc->num_user_formats; i++)
+ if (isc->user_formats[i]->fourcc == fival->pixel_format)
+ ret = 0;
+
+ for (i = 0; i < ARRAY_SIZE(controller_formats); i++)
+ if (controller_formats[i].fourcc == fival->pixel_format)
+ ret = 0;
+
+ if (ret)
+ return ret;
+
+ ret = v4l2_subdev_call(isc->current_subdev->sd, pad,
+ enum_frame_interval, NULL, &fie);
+ if (ret)
+ return ret;
+
+ fie.code = isc->config.sd_format->mbus_code;
+ fival->type = V4L2_FRMIVAL_TYPE_DISCRETE;
+ fival->discrete = fie.interval;
+
+ return 0;
+}
+
+static const struct v4l2_ioctl_ops isc_ioctl_ops = {
+ .vidioc_querycap = isc_querycap,
+ .vidioc_enum_fmt_vid_cap = isc_enum_fmt_vid_cap,
+ .vidioc_g_fmt_vid_cap = isc_g_fmt_vid_cap,
+ .vidioc_s_fmt_vid_cap = isc_s_fmt_vid_cap,
+ .vidioc_try_fmt_vid_cap = isc_try_fmt_vid_cap,
+
+ .vidioc_enum_input = isc_enum_input,
+ .vidioc_g_input = isc_g_input,
+ .vidioc_s_input = isc_s_input,
+
+ .vidioc_reqbufs = vb2_ioctl_reqbufs,
+ .vidioc_querybuf = vb2_ioctl_querybuf,
+ .vidioc_qbuf = vb2_ioctl_qbuf,
+ .vidioc_expbuf = vb2_ioctl_expbuf,
+ .vidioc_dqbuf = vb2_ioctl_dqbuf,
+ .vidioc_create_bufs = vb2_ioctl_create_bufs,
+ .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
+ .vidioc_streamon = vb2_ioctl_streamon,
+ .vidioc_streamoff = vb2_ioctl_streamoff,
+
+ .vidioc_g_parm = isc_g_parm,
+ .vidioc_s_parm = isc_s_parm,
+ .vidioc_enum_framesizes = isc_enum_framesizes,
+ .vidioc_enum_frameintervals = isc_enum_frameintervals,
+
+ .vidioc_log_status = v4l2_ctrl_log_status,
+ .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
+ .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
+};
+
+static int isc_open(struct file *file)
+{
+ struct isc_device *isc = video_drvdata(file);
+ struct v4l2_subdev *sd = isc->current_subdev->sd;
+ int ret;
+
+ if (mutex_lock_interruptible(&isc->lock))
+ return -ERESTARTSYS;
+
+ ret = v4l2_fh_open(file);
+ if (ret < 0)
+ goto unlock;
+
+ if (!v4l2_fh_is_singular_file(file))
+ goto unlock;
+
+ ret = v4l2_subdev_call(sd, core, s_power, 1);
+ if (ret < 0 && ret != -ENOIOCTLCMD) {
+ v4l2_fh_release(file);
+ goto unlock;
+ }
+
+ ret = isc_set_fmt(isc, &isc->fmt);
+ if (ret) {
+ v4l2_subdev_call(sd, core, s_power, 0);
+ v4l2_fh_release(file);
+ }
+
+unlock:
+ mutex_unlock(&isc->lock);
+ return ret;
+}
+
+static int isc_release(struct file *file)
+{
+ struct isc_device *isc = video_drvdata(file);
+ struct v4l2_subdev *sd = isc->current_subdev->sd;
+ bool fh_singular;
+ int ret;
+
+ mutex_lock(&isc->lock);
+
+ fh_singular = v4l2_fh_is_singular_file(file);
+
+ ret = _vb2_fop_release(file, NULL);
+
+ if (fh_singular)
+ v4l2_subdev_call(sd, core, s_power, 0);
+
+ mutex_unlock(&isc->lock);
+
+ return ret;
+}
+
+static const struct v4l2_file_operations isc_fops = {
+ .owner = THIS_MODULE,
+ .open = isc_open,
+ .release = isc_release,
+ .unlocked_ioctl = video_ioctl2,
+ .read = vb2_fop_read,
+ .mmap = vb2_fop_mmap,
+ .poll = vb2_fop_poll,
+};
+
+irqreturn_t isc_interrupt(int irq, void *dev_id)
+{
+ struct isc_device *isc = (struct isc_device *)dev_id;
+ struct regmap *regmap = isc->regmap;
+ u32 isc_intsr, isc_intmask, pending;
+ irqreturn_t ret = IRQ_NONE;
+
+ regmap_read(regmap, ISC_INTSR, &isc_intsr);
+ regmap_read(regmap, ISC_INTMASK, &isc_intmask);
+
+ pending = isc_intsr & isc_intmask;
+
+ if (likely(pending & ISC_INT_DDONE)) {
+ spin_lock(&isc->dma_queue_lock);
+ if (isc->cur_frm) {
+ struct vb2_v4l2_buffer *vbuf = &isc->cur_frm->vb;
+ struct vb2_buffer *vb = &vbuf->vb2_buf;
+
+ vb->timestamp = ktime_get_ns();
+ vbuf->sequence = isc->sequence++;
+ vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
+ isc->cur_frm = NULL;
+ }
+
+ if (!list_empty(&isc->dma_queue) && !isc->stop) {
+ isc->cur_frm = list_first_entry(&isc->dma_queue,
+ struct isc_buffer, list);
+ list_del(&isc->cur_frm->list);
+
+ isc_start_dma(isc);
+ }
+
+ if (isc->stop)
+ complete(&isc->comp);
+
+ ret = IRQ_HANDLED;
+ spin_unlock(&isc->dma_queue_lock);
+ }
+
+ if (pending & ISC_INT_HISDONE) {
+ schedule_work(&isc->awb_work);
+ ret = IRQ_HANDLED;
+ }
+
+ return ret;
+}
+
+static void isc_hist_count(struct isc_device *isc, u32 *min, u32 *max)
+{
+ struct regmap *regmap = isc->regmap;
+ struct isc_ctrls *ctrls = &isc->ctrls;
+ u32 *hist_count = &ctrls->hist_count[ctrls->hist_id];
+ u32 *hist_entry = &ctrls->hist_entry[0];
+ u32 i;
+
+ *min = 0;
+ *max = HIST_ENTRIES;
+
+ regmap_bulk_read(regmap, ISC_HIS_ENTRY, hist_entry, HIST_ENTRIES);
+
+ *hist_count = 0;
+ /*
+ * we deliberately ignore the end of the histogram,
+ * the most white pixels
+ */
+ for (i = 1; i < HIST_ENTRIES; i++) {
+ if (*hist_entry && !*min)
+ *min = i;
+ if (*hist_entry)
+ *max = i;
+ *hist_count += i * (*hist_entry++);
+ }
+
+ if (!*min)
+ *min = 1;
+}
+
+static void isc_wb_update(struct isc_ctrls *ctrls)
+{
+ u32 *hist_count = &ctrls->hist_count[0];
+ u32 c, offset[4];
+ u64 avg = 0;
+ /* We compute two gains, stretch gain and grey world gain */
+ u32 s_gain[4], gw_gain[4];
+
+ /*
+ * According to Grey World, we need to set gains for R/B to normalize
+ * them towards the green channel.
+ * Thus we want to keep Green as fixed and adjust only Red/Blue
+ * Compute the average of the both green channels first
+ */
+ avg = (u64)hist_count[ISC_HIS_CFG_MODE_GR] +
+ (u64)hist_count[ISC_HIS_CFG_MODE_GB];
+ avg >>= 1;
+
+ /* Green histogram is null, nothing to do */
+ if (!avg)
+ return;
+
+ for (c = ISC_HIS_CFG_MODE_GR; c <= ISC_HIS_CFG_MODE_B; c++) {
+ /*
+ * the color offset is the minimum value of the histogram.
+ * we stretch this color to the full range by substracting
+ * this value from the color component.
+ */
+ offset[c] = ctrls->hist_minmax[c][HIST_MIN_INDEX];
+ /*
+ * The offset is always at least 1. If the offset is 1, we do
+ * not need to adjust it, so our result must be zero.
+ * the offset is computed in a histogram on 9 bits (0..512)
+ * but the offset in register is based on
+ * 12 bits pipeline (0..4096).
+ * we need to shift with the 3 bits that the histogram is
+ * ignoring
+ */
+ ctrls->offset[c] = (offset[c] - 1) << 3;
+
+ /* the offset is then taken and converted to 2's complements */
+ if (!ctrls->offset[c])
+ ctrls->offset[c] = ISC_WB_O_ZERO_VAL;
+
+ /*
+ * the stretch gain is the total number of histogram bins
+ * divided by the actual range of color component (Max - Min)
+ * If we compute gain like this, the actual color component
+ * will be stretched to the full histogram.
+ * We need to shift 9 bits for precision, we have 9 bits for
+ * decimals
+ */
+ s_gain[c] = (HIST_ENTRIES << 9) /
+ (ctrls->hist_minmax[c][HIST_MAX_INDEX] -
+ ctrls->hist_minmax[c][HIST_MIN_INDEX] + 1);
+
+ /*
+ * Now we have to compute the gain w.r.t. the average.
+ * Add/lose gain to the component towards the average.
+ * If it happens that the component is zero, use the
+ * fixed point value : 1.0 gain.
+ */
+ if (hist_count[c])
+ gw_gain[c] = div_u64(avg << 9, hist_count[c]);
+ else
+ gw_gain[c] = 1 << 9;
+
+ /* multiply both gains and adjust for decimals */
+ ctrls->gain[c] = s_gain[c] * gw_gain[c];
+ ctrls->gain[c] >>= 9;
+ }
+}
+
+static void isc_awb_work(struct work_struct *w)
+{
+ struct isc_device *isc =
+ container_of(w, struct isc_device, awb_work);
+ struct regmap *regmap = isc->regmap;
+ struct isc_ctrls *ctrls = &isc->ctrls;
+ u32 hist_id = ctrls->hist_id;
+ u32 baysel;
+ unsigned long flags;
+ u32 min, max;
+
+ /* streaming is not active anymore */
+ if (isc->stop)
+ return;
+
+ if (ctrls->hist_stat != HIST_ENABLED)
+ return;
+
+ isc_hist_count(isc, &min, &max);
+ ctrls->hist_minmax[hist_id][HIST_MIN_INDEX] = min;
+ ctrls->hist_minmax[hist_id][HIST_MAX_INDEX] = max;
+
+ if (hist_id != ISC_HIS_CFG_MODE_B) {
+ hist_id++;
+ } else {
+ isc_wb_update(ctrls);
+ hist_id = ISC_HIS_CFG_MODE_GR;
+ }
+
+ ctrls->hist_id = hist_id;
+ baysel = isc->config.sd_format->cfa_baycfg << ISC_HIS_CFG_BAYSEL_SHIFT;
+
+ /* if no more auto white balance, reset controls. */
+ if (ctrls->awb == ISC_WB_NONE)
+ isc_reset_awb_ctrls(isc);
+
+ pm_runtime_get_sync(isc->dev);
+
+ /*
+ * only update if we have all the required histograms and controls
+ * if awb has been disabled, we need to reset registers as well.
+ */
+ if (hist_id == ISC_HIS_CFG_MODE_GR || ctrls->awb == ISC_WB_NONE) {
+ /*
+ * It may happen that DMA Done IRQ will trigger while we are
+ * updating white balance registers here.
+ * In that case, only parts of the controls have been updated.
+ * We can avoid that by locking the section.
+ */
+ spin_lock_irqsave(&isc->awb_lock, flags);
+ isc_update_awb_ctrls(isc);
+ spin_unlock_irqrestore(&isc->awb_lock, flags);
+
+ /*
+ * if we are doing just the one time white balance adjustment,
+ * we are basically done.
+ */
+ if (ctrls->awb == ISC_WB_ONETIME) {
+ v4l2_info(&isc->v4l2_dev,
+ "Completed one time white-balance adjustment.\n");
+ ctrls->awb = ISC_WB_NONE;
+ }
+ }
+ regmap_write(regmap, ISC_HIS_CFG, hist_id | baysel | ISC_HIS_CFG_RAR);
+ isc_update_profile(isc);
+ /* if awb has been disabled, we don't need to start another histogram */
+ if (ctrls->awb)
+ regmap_write(regmap, ISC_CTRLEN, ISC_CTRL_HISREQ);
+
+ pm_runtime_put_sync(isc->dev);
+}
+
+static int isc_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct isc_device *isc = container_of(ctrl->handler,
+ struct isc_device, ctrls.handler);
+ struct isc_ctrls *ctrls = &isc->ctrls;
+
+ if (ctrl->flags & V4L2_CTRL_FLAG_INACTIVE)
+ return 0;
+
+ switch (ctrl->id) {
+ case V4L2_CID_BRIGHTNESS:
+ ctrls->brightness = ctrl->val & ISC_CBC_BRIGHT_MASK;
+ break;
+ case V4L2_CID_CONTRAST:
+ ctrls->contrast = ctrl->val & ISC_CBC_CONTRAST_MASK;
+ break;
+ case V4L2_CID_GAMMA:
+ ctrls->gamma_index = ctrl->val;
+ break;
+ case V4L2_CID_AUTO_WHITE_BALANCE:
+ if (ctrl->val == 1)
+ ctrls->awb = ISC_WB_AUTO;
+ else
+ ctrls->awb = ISC_WB_NONE;
+
+ /* we did not configure ISC yet */
+ if (!isc->config.sd_format)
+ break;
+
+ if (ctrls->hist_stat != HIST_ENABLED)
+ isc_reset_awb_ctrls(isc);
+
+ if (isc->ctrls.awb == ISC_WB_AUTO &&
+ vb2_is_streaming(&isc->vb2_vidq) &&
+ ISC_IS_FORMAT_RAW(isc->config.sd_format->mbus_code))
+ isc_set_histogram(isc, true);
+
+ break;
+ case V4L2_CID_DO_WHITE_BALANCE:
+ /* if AWB is enabled, do nothing */
+ if (ctrls->awb == ISC_WB_AUTO)
+ return 0;
+
+ ctrls->awb = ISC_WB_ONETIME;
+ isc_set_histogram(isc, true);
+ v4l2_dbg(1, debug, &isc->v4l2_dev,
+ "One time white-balance started.\n");
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static const struct v4l2_ctrl_ops isc_ctrl_ops = {
+ .s_ctrl = isc_s_ctrl,
+};
+
+static int isc_ctrl_init(struct isc_device *isc)
+{
+ const struct v4l2_ctrl_ops *ops = &isc_ctrl_ops;
+ struct isc_ctrls *ctrls = &isc->ctrls;
+ struct v4l2_ctrl_handler *hdl = &ctrls->handler;
+ int ret;
+
+ ctrls->hist_stat = HIST_INIT;
+ isc_reset_awb_ctrls(isc);
+
+ ret = v4l2_ctrl_handler_init(hdl, 5);
+ if (ret < 0)
+ return ret;
+
+ ctrls->brightness = 0;
+ ctrls->contrast = 256;
+
+ v4l2_ctrl_new_std(hdl, ops, V4L2_CID_BRIGHTNESS, -1024, 1023, 1, 0);
+ v4l2_ctrl_new_std(hdl, ops, V4L2_CID_CONTRAST, -2048, 2047, 1, 256);
+ v4l2_ctrl_new_std(hdl, ops, V4L2_CID_GAMMA, 0, GAMMA_MAX, 1, 2);
+ v4l2_ctrl_new_std(hdl, ops, V4L2_CID_AUTO_WHITE_BALANCE, 0, 1, 1, 1);
+
+ /* do_white_balance is a button, so min,max,step,default are ignored */
+ isc->do_wb_ctrl = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_DO_WHITE_BALANCE,
+ 0, 0, 0, 0);
+
+ v4l2_ctrl_activate(isc->do_wb_ctrl, false);
+
+ v4l2_ctrl_handler_setup(hdl);
+
+ return 0;
+}
+
+static int isc_async_bound(struct v4l2_async_notifier *notifier,
+ struct v4l2_subdev *subdev,
+ struct v4l2_async_subdev *asd)
+{
+ struct isc_device *isc = container_of(notifier->v4l2_dev,
+ struct isc_device, v4l2_dev);
+ struct isc_subdev_entity *subdev_entity =
+ container_of(notifier, struct isc_subdev_entity, notifier);
+
+ if (video_is_registered(&isc->video_dev)) {
+ v4l2_err(&isc->v4l2_dev, "only supports one sub-device.\n");
+ return -EBUSY;
+ }
+
+ subdev_entity->sd = subdev;
+
+ return 0;
+}
+
+static void isc_async_unbind(struct v4l2_async_notifier *notifier,
+ struct v4l2_subdev *subdev,
+ struct v4l2_async_subdev *asd)
+{
+ struct isc_device *isc = container_of(notifier->v4l2_dev,
+ struct isc_device, v4l2_dev);
+ cancel_work_sync(&isc->awb_work);
+ video_unregister_device(&isc->video_dev);
+ v4l2_ctrl_handler_free(&isc->ctrls.handler);
+}
+
+static struct isc_format *find_format_by_code(unsigned int code, int *index)
+{
+ struct isc_format *fmt = &formats_list[0];
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(formats_list); i++) {
+ if (fmt->mbus_code == code) {
+ *index = i;
+ return fmt;
+ }
+
+ fmt++;
+ }
+
+ return NULL;
+}
+
+static int isc_formats_init(struct isc_device *isc)
+{
+ struct isc_format *fmt;
+ struct v4l2_subdev *subdev = isc->current_subdev->sd;
+ unsigned int num_fmts, i, j;
+ u32 list_size = ARRAY_SIZE(formats_list);
+ struct v4l2_subdev_mbus_code_enum mbus_code = {
+ .which = V4L2_SUBDEV_FORMAT_ACTIVE,
+ };
+
+ num_fmts = 0;
+ while (!v4l2_subdev_call(subdev, pad, enum_mbus_code,
+ NULL, &mbus_code)) {
+ mbus_code.index++;
+
+ fmt = find_format_by_code(mbus_code.code, &i);
+ if (!fmt) {
+ v4l2_warn(&isc->v4l2_dev, "Mbus code %x not supported\n",
+ mbus_code.code);
+ continue;
+ }
+
+ fmt->sd_support = true;
+ num_fmts++;
+ }
+
+ if (!num_fmts)
+ return -ENXIO;
+
+ isc->num_user_formats = num_fmts;
+ isc->user_formats = devm_kcalloc(isc->dev,
+ num_fmts, sizeof(*isc->user_formats),
+ GFP_KERNEL);
+ if (!isc->user_formats)
+ return -ENOMEM;
+
+ fmt = &formats_list[0];
+ for (i = 0, j = 0; i < list_size; i++) {
+ if (fmt->sd_support)
+ isc->user_formats[j++] = fmt;
+ fmt++;
+ }
+
+ return 0;
+}
+
+static int isc_set_default_fmt(struct isc_device *isc)
+{
+ struct v4l2_format f = {
+ .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
+ .fmt.pix = {
+ .width = VGA_WIDTH,
+ .height = VGA_HEIGHT,
+ .field = V4L2_FIELD_NONE,
+ .pixelformat = isc->user_formats[0]->fourcc,
+ },
+ };
+ int ret;
+
+ ret = isc_try_fmt(isc, &f, NULL);
+ if (ret)
+ return ret;
+
+ isc->fmt = f;
+ return 0;
+}
+
+static int isc_async_complete(struct v4l2_async_notifier *notifier)
+{
+ struct isc_device *isc = container_of(notifier->v4l2_dev,
+ struct isc_device, v4l2_dev);
+ struct video_device *vdev = &isc->video_dev;
+ struct vb2_queue *q = &isc->vb2_vidq;
+ int ret;
+
+ INIT_WORK(&isc->awb_work, isc_awb_work);
+
+ ret = v4l2_device_register_subdev_nodes(&isc->v4l2_dev);
+ if (ret < 0) {
+ v4l2_err(&isc->v4l2_dev, "Failed to register subdev nodes\n");
+ return ret;
+ }
+
+ isc->current_subdev = container_of(notifier,
+ struct isc_subdev_entity, notifier);
+ mutex_init(&isc->lock);
+ init_completion(&isc->comp);
+
+ /* Initialize videobuf2 queue */
+ q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ q->io_modes = VB2_MMAP | VB2_DMABUF | VB2_READ;
+ q->drv_priv = isc;
+ q->buf_struct_size = sizeof(struct isc_buffer);
+ q->ops = &isc_vb2_ops;
+ q->mem_ops = &vb2_dma_contig_memops;
+ q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
+ q->lock = &isc->lock;
+ q->min_buffers_needed = 1;
+ q->dev = isc->dev;
+
+ ret = vb2_queue_init(q);
+ if (ret < 0) {
+ v4l2_err(&isc->v4l2_dev,
+ "vb2_queue_init() failed: %d\n", ret);
+ return ret;
+ }
+
+ /* Init video dma queues */
+ INIT_LIST_HEAD(&isc->dma_queue);
+ spin_lock_init(&isc->dma_queue_lock);
+ spin_lock_init(&isc->awb_lock);
+
+ ret = isc_formats_init(isc);
+ if (ret < 0) {
+ v4l2_err(&isc->v4l2_dev,
+ "Init format failed: %d\n", ret);
+ return ret;
+ }
+
+ ret = isc_set_default_fmt(isc);
+ if (ret) {
+ v4l2_err(&isc->v4l2_dev, "Could not set default format\n");
+ return ret;
+ }
+
+ ret = isc_ctrl_init(isc);
+ if (ret) {
+ v4l2_err(&isc->v4l2_dev, "Init isc ctrols failed: %d\n", ret);
+ return ret;
+ }
+
+ /* Register video device */
+ strscpy(vdev->name, ATMEL_ISC_NAME, sizeof(vdev->name));
+ vdev->release = video_device_release_empty;
+ vdev->fops = &isc_fops;
+ vdev->ioctl_ops = &isc_ioctl_ops;
+ vdev->v4l2_dev = &isc->v4l2_dev;
+ vdev->vfl_dir = VFL_DIR_RX;
+ vdev->queue = q;
+ vdev->lock = &isc->lock;
+ vdev->ctrl_handler = &isc->ctrls.handler;
+ vdev->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_CAPTURE;
+ video_set_drvdata(vdev, isc);
+
+ ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
+ if (ret < 0) {
+ v4l2_err(&isc->v4l2_dev,
+ "video_register_device failed: %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+const struct v4l2_async_notifier_operations isc_async_ops = {
+ .bound = isc_async_bound,
+ .unbind = isc_async_unbind,
+ .complete = isc_async_complete,
+};
+
+void isc_subdev_cleanup(struct isc_device *isc)
+{
+ struct isc_subdev_entity *subdev_entity;
+
+ list_for_each_entry(subdev_entity, &isc->subdev_entities, list) {
+ v4l2_async_notifier_unregister(&subdev_entity->notifier);
+ v4l2_async_notifier_cleanup(&subdev_entity->notifier);
+ }
+
+ INIT_LIST_HEAD(&isc->subdev_entities);
+}
+
+int isc_pipeline_init(struct isc_device *isc)
+{
+ struct device *dev = isc->dev;
+ struct regmap *regmap = isc->regmap;
+ struct regmap_field *regs;
+ unsigned int i;
+
+ /* WB-->CFA-->CC-->GAM-->CSC-->CBC-->SUB422-->SUB420 */
+ const struct reg_field regfields[ISC_PIPE_LINE_NODE_NUM] = {
+ REG_FIELD(ISC_WB_CTRL, 0, 0),
+ REG_FIELD(ISC_CFA_CTRL, 0, 0),
+ REG_FIELD(ISC_CC_CTRL, 0, 0),
+ REG_FIELD(ISC_GAM_CTRL, 0, 0),
+ REG_FIELD(ISC_GAM_CTRL, 1, 1),
+ REG_FIELD(ISC_GAM_CTRL, 2, 2),
+ REG_FIELD(ISC_GAM_CTRL, 3, 3),
+ REG_FIELD(ISC_CSC_CTRL, 0, 0),
+ REG_FIELD(ISC_CBC_CTRL, 0, 0),
+ REG_FIELD(ISC_SUB422_CTRL, 0, 0),
+ REG_FIELD(ISC_SUB420_CTRL, 0, 0),
+ };
+
+ for (i = 0; i < ISC_PIPE_LINE_NODE_NUM; i++) {
+ regs = devm_regmap_field_alloc(dev, regmap, regfields[i]);
+ if (IS_ERR(regs))
+ return PTR_ERR(regs);
+
+ isc->pipeline[i] = regs;
+ }
+
+ return 0;
+}
+
+/* regmap configuration */
+#define ATMEL_ISC_REG_MAX 0xbfc
+const struct regmap_config isc_regmap_config = {
+ .reg_bits = 32,
+ .reg_stride = 4,
+ .val_bits = 32,
+ .max_register = ATMEL_ISC_REG_MAX,
+};
+
diff --git a/drivers/media/platform/atmel/atmel-isc.c b/drivers/media/platform/atmel/atmel-isc.c
deleted file mode 100644
index da3b441..0000000
--- a/drivers/media/platform/atmel/atmel-isc.c
+++ /dev/null
@@ -1,2634 +0,0 @@
-/*
- * Atmel Image Sensor Controller (ISC) driver
- *
- * Copyright (C) 2016 Atmel
- *
- * Author: Songjun Wu <songjun.wu@xxxxxxxxxxxxx>
- *
- * This program is free software; you may redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; version 2 of the License.
- *
- * Sensor-->PFE-->WB-->CFA-->CC-->GAM-->CSC-->CBC-->SUB-->RLP-->DMA
- *
- * ISC video pipeline integrates the following submodules:
- * PFE: Parallel Front End to sample the camera sensor input stream
- * WB: Programmable white balance in the Bayer domain
- * CFA: Color filter array interpolation module
- * CC: Programmable color correction
- * GAM: Gamma correction
- * CSC: Programmable color space conversion
- * CBC: Contrast and Brightness control
- * SUB: This module performs YCbCr444 to YCbCr420 chrominance subsampling
- * RLP: This module performs rounding, range limiting
- * and packing of the incoming data
- */
-
-#include <linux/clk.h>
-#include <linux/clkdev.h>
-#include <linux/clk-provider.h>
-#include <linux/delay.h>
-#include <linux/interrupt.h>
-#include <linux/math64.h>
-#include <linux/module.h>
-#include <linux/of.h>
-#include <linux/of_graph.h>
-#include <linux/platform_device.h>
-#include <linux/pm_runtime.h>
-#include <linux/regmap.h>
-#include <linux/videodev2.h>
-
-#include <media/v4l2-ctrls.h>
-#include <media/v4l2-device.h>
-#include <media/v4l2-event.h>
-#include <media/v4l2-image-sizes.h>
-#include <media/v4l2-ioctl.h>
-#include <media/v4l2-fwnode.h>
-#include <media/v4l2-subdev.h>
-#include <media/videobuf2-dma-contig.h>
-
-#include "atmel-isc-regs.h"
-
-#define ATMEL_ISC_NAME "atmel_isc"
-
-#define ISC_MAX_SUPPORT_WIDTH 2592
-#define ISC_MAX_SUPPORT_HEIGHT 1944
-
-#define ISC_CLK_MAX_DIV 255
-
-enum isc_clk_id {
- ISC_ISPCK = 0,
- ISC_MCK = 1,
-};
-
-struct isc_clk {
- struct clk_hw hw;
- struct clk *clk;
- struct regmap *regmap;
- spinlock_t lock;
- u8 id;
- u8 parent_id;
- u32 div;
- struct device *dev;
-};
-
-#define to_isc_clk(hw) container_of(hw, struct isc_clk, hw)
-
-struct isc_buffer {
- struct vb2_v4l2_buffer vb;
- struct list_head list;
-};
-
-struct isc_subdev_entity {
- struct v4l2_subdev *sd;
- struct v4l2_async_subdev *asd;
- struct v4l2_async_notifier notifier;
-
- u32 pfe_cfg0;
-
- struct list_head list;
-};
-
-/*
- * struct isc_format - ISC media bus format information
- This structure represents the interface between the ISC
- and the sensor. It's the input format received by
- the ISC.
- * @fourcc: Fourcc code for this format
- * @mbus_code: V4L2 media bus format code.
- * @cfa_baycfg: If this format is RAW BAYER, indicate the type of bayer.
- this is either BGBG, RGRG, etc.
- * @pfe_cfg0_bps: Number of hardware data lines connected to the ISC
- */
-
-struct isc_format {
- u32 fourcc;
- u32 mbus_code;
- u32 cfa_baycfg;
-
- bool sd_support;
- u32 pfe_cfg0_bps;
-};
-
-/* Pipeline bitmap */
-#define WB_ENABLE BIT(0)
-#define CFA_ENABLE BIT(1)
-#define CC_ENABLE BIT(2)
-#define GAM_ENABLE BIT(3)
-#define GAM_BENABLE BIT(4)
-#define GAM_GENABLE BIT(5)
-#define GAM_RENABLE BIT(6)
-#define CSC_ENABLE BIT(7)
-#define CBC_ENABLE BIT(8)
-#define SUB422_ENABLE BIT(9)
-#define SUB420_ENABLE BIT(10)
-
-#define GAM_ENABLES (GAM_RENABLE | GAM_GENABLE | GAM_BENABLE | GAM_ENABLE)
-
-/*
- * struct fmt_config - ISC format configuration and internal pipeline
- This structure represents the internal configuration
- of the ISC.
- It also holds the format that ISC will present to v4l2.
- * @sd_format: Pointer to an isc_format struct that holds the sensor
- configuration.
- * @fourcc: Fourcc code for this format.
- * @bpp: Bytes per pixel in the current format.
- * @rlp_cfg_mode: Configuration of the RLP (rounding, limiting packaging)
- * @dcfg_imode: Configuration of the input of the DMA module
- * @dctrl_dview: Configuration of the output of the DMA module
- * @bits_pipeline: Configuration of the pipeline, which modules are enabled
- */
-struct fmt_config {
- struct isc_format *sd_format;
-
- u32 fourcc;
- u8 bpp;
-
- u32 rlp_cfg_mode;
- u32 dcfg_imode;
- u32 dctrl_dview;
-
- u32 bits_pipeline;
-};
-
-#define HIST_ENTRIES 512
-#define HIST_BAYER (ISC_HIS_CFG_MODE_B + 1)
-
-enum{
- HIST_INIT = 0,
- HIST_ENABLED,
- HIST_DISABLED,
-};
-
-struct isc_ctrls {
- struct v4l2_ctrl_handler handler;
-
- u32 brightness;
- u32 contrast;
- u8 gamma_index;
-#define ISC_WB_NONE 0
-#define ISC_WB_AUTO 1
-#define ISC_WB_ONETIME 2
- u8 awb;
-
- /* one for each component : GR, R, GB, B */
- u32 gain[HIST_BAYER];
- u32 offset[HIST_BAYER];
-
- u32 hist_entry[HIST_ENTRIES];
- u32 hist_count[HIST_BAYER];
- u8 hist_id;
- u8 hist_stat;
-#define HIST_MIN_INDEX 0
-#define HIST_MAX_INDEX 1
- u32 hist_minmax[HIST_BAYER][2];
-};
-
-#define ISC_PIPE_LINE_NODE_NUM 11
-
-struct isc_device {
- struct regmap *regmap;
- struct clk *hclock;
- struct clk *ispck;
- struct isc_clk isc_clks[2];
-
- struct device *dev;
- struct v4l2_device v4l2_dev;
- struct video_device video_dev;
-
- struct vb2_queue vb2_vidq;
- spinlock_t dma_queue_lock;
- struct list_head dma_queue;
- struct isc_buffer *cur_frm;
- unsigned int sequence;
- bool stop;
- struct completion comp;
-
- struct v4l2_format fmt;
- struct isc_format **user_formats;
- unsigned int num_user_formats;
-
- struct fmt_config config;
- struct fmt_config try_config;
-
- struct isc_ctrls ctrls;
- struct v4l2_ctrl *do_wb_ctrl;
- struct work_struct awb_work;
-
- struct mutex lock;
- spinlock_t awb_lock;
-
- struct regmap_field *pipeline[ISC_PIPE_LINE_NODE_NUM];
-
- struct isc_subdev_entity *current_subdev;
- struct list_head subdev_entities;
-};
-
-/* This is a list of the formats that the ISC can *output* */
-static struct isc_format controller_formats[] = {
- {
- .fourcc = V4L2_PIX_FMT_ARGB444,
- },
- {
- .fourcc = V4L2_PIX_FMT_ARGB555,
- },
- {
- .fourcc = V4L2_PIX_FMT_RGB565,
- },
- {
- .fourcc = V4L2_PIX_FMT_ABGR32,
- },
- {
- .fourcc = V4L2_PIX_FMT_XBGR32,
- },
- {
- .fourcc = V4L2_PIX_FMT_YUV420,
- },
- {
- .fourcc = V4L2_PIX_FMT_YUYV,
- },
- {
- .fourcc = V4L2_PIX_FMT_YUV422P,
- },
- {
- .fourcc = V4L2_PIX_FMT_GREY,
- },
-};
-
-/* This is a list of formats that the ISC can receive as *input* */
-static struct isc_format formats_list[] = {
- {
- .fourcc = V4L2_PIX_FMT_SBGGR8,
- .mbus_code = MEDIA_BUS_FMT_SBGGR8_1X8,
- .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT,
- .cfa_baycfg = ISC_BAY_CFG_BGBG,
- },
- {
- .fourcc = V4L2_PIX_FMT_SGBRG8,
- .mbus_code = MEDIA_BUS_FMT_SGBRG8_1X8,
- .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT,
- .cfa_baycfg = ISC_BAY_CFG_GBGB,
- },
- {
- .fourcc = V4L2_PIX_FMT_SGRBG8,
- .mbus_code = MEDIA_BUS_FMT_SGRBG8_1X8,
- .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT,
- .cfa_baycfg = ISC_BAY_CFG_GRGR,
- },
- {
- .fourcc = V4L2_PIX_FMT_SRGGB8,
- .mbus_code = MEDIA_BUS_FMT_SRGGB8_1X8,
- .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT,
- .cfa_baycfg = ISC_BAY_CFG_RGRG,
- },
- {
- .fourcc = V4L2_PIX_FMT_SBGGR10,
- .mbus_code = MEDIA_BUS_FMT_SBGGR10_1X10,
- .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TEN,
- .cfa_baycfg = ISC_BAY_CFG_RGRG,
- },
- {
- .fourcc = V4L2_PIX_FMT_SGBRG10,
- .mbus_code = MEDIA_BUS_FMT_SGBRG10_1X10,
- .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TEN,
- .cfa_baycfg = ISC_BAY_CFG_GBGB,
- },
- {
- .fourcc = V4L2_PIX_FMT_SGRBG10,
- .mbus_code = MEDIA_BUS_FMT_SGRBG10_1X10,
- .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TEN,
- .cfa_baycfg = ISC_BAY_CFG_GRGR,
- },
- {
- .fourcc = V4L2_PIX_FMT_SRGGB10,
- .mbus_code = MEDIA_BUS_FMT_SRGGB10_1X10,
- .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TEN,
- .cfa_baycfg = ISC_BAY_CFG_RGRG,
- },
- {
- .fourcc = V4L2_PIX_FMT_SBGGR12,
- .mbus_code = MEDIA_BUS_FMT_SBGGR12_1X12,
- .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TWELVE,
- .cfa_baycfg = ISC_BAY_CFG_BGBG,
- },
- {
- .fourcc = V4L2_PIX_FMT_SGBRG12,
- .mbus_code = MEDIA_BUS_FMT_SGBRG12_1X12,
- .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TWELVE,
- .cfa_baycfg = ISC_BAY_CFG_GBGB,
- },
- {
- .fourcc = V4L2_PIX_FMT_SGRBG12,
- .mbus_code = MEDIA_BUS_FMT_SGRBG12_1X12,
- .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TWELVE,
- .cfa_baycfg = ISC_BAY_CFG_GRGR,
- },
- {
- .fourcc = V4L2_PIX_FMT_SRGGB12,
- .mbus_code = MEDIA_BUS_FMT_SRGGB12_1X12,
- .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TWELVE,
- .cfa_baycfg = ISC_BAY_CFG_RGRG,
- },
- {
- .fourcc = V4L2_PIX_FMT_GREY,
- .mbus_code = MEDIA_BUS_FMT_Y8_1X8,
- .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT,
- },
- {
- .fourcc = V4L2_PIX_FMT_YUYV,
- .mbus_code = MEDIA_BUS_FMT_YUYV8_2X8,
- .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT,
- },
- {
- .fourcc = V4L2_PIX_FMT_RGB565,
- .mbus_code = MEDIA_BUS_FMT_RGB565_2X8_LE,
- .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT,
- },
-};
-
-#define GAMMA_MAX 2
-#define GAMMA_ENTRIES 64
-
-/* Gamma table with gamma 1/2.2 */
-static const u32 isc_gamma_table[GAMMA_MAX + 1][GAMMA_ENTRIES] = {
- /* 0 --> gamma 1/1.8 */
- { 0x65, 0x66002F, 0x950025, 0xBB0020, 0xDB001D, 0xF8001A,
- 0x1130018, 0x12B0017, 0x1420016, 0x1580014, 0x16D0013, 0x1810012,
- 0x1940012, 0x1A60012, 0x1B80011, 0x1C90010, 0x1DA0010, 0x1EA000F,
- 0x1FA000F, 0x209000F, 0x218000F, 0x227000E, 0x235000E, 0x243000E,
- 0x251000E, 0x25F000D, 0x26C000D, 0x279000D, 0x286000D, 0x293000C,
- 0x2A0000C, 0x2AC000C, 0x2B8000C, 0x2C4000C, 0x2D0000B, 0x2DC000B,
- 0x2E7000B, 0x2F3000B, 0x2FE000B, 0x309000B, 0x314000B, 0x31F000A,
- 0x32A000A, 0x334000B, 0x33F000A, 0x349000A, 0x354000A, 0x35E000A,
- 0x368000A, 0x372000A, 0x37C000A, 0x386000A, 0x3900009, 0x399000A,
- 0x3A30009, 0x3AD0009, 0x3B60009, 0x3BF000A, 0x3C90009, 0x3D20009,
- 0x3DB0009, 0x3E40009, 0x3ED0009, 0x3F60009 },
-
- /* 1 --> gamma 1/2 */
- { 0x7F, 0x800034, 0xB50028, 0xDE0021, 0x100001E, 0x11E001B,
- 0x1390019, 0x1520017, 0x16A0015, 0x1800014, 0x1940014, 0x1A80013,
- 0x1BB0012, 0x1CD0011, 0x1DF0010, 0x1EF0010, 0x200000F, 0x20F000F,
- 0x21F000E, 0x22D000F, 0x23C000E, 0x24A000E, 0x258000D, 0x265000D,
- 0x273000C, 0x27F000D, 0x28C000C, 0x299000C, 0x2A5000C, 0x2B1000B,
- 0x2BC000C, 0x2C8000B, 0x2D3000C, 0x2DF000B, 0x2EA000A, 0x2F5000A,
- 0x2FF000B, 0x30A000A, 0x314000B, 0x31F000A, 0x329000A, 0x333000A,
- 0x33D0009, 0x3470009, 0x350000A, 0x35A0009, 0x363000A, 0x36D0009,
- 0x3760009, 0x37F0009, 0x3880009, 0x3910009, 0x39A0009, 0x3A30009,
- 0x3AC0008, 0x3B40009, 0x3BD0008, 0x3C60008, 0x3CE0008, 0x3D60009,
- 0x3DF0008, 0x3E70008, 0x3EF0008, 0x3F70008 },
-
- /* 2 --> gamma 1/2.2 */
- { 0x99, 0x9B0038, 0xD4002A, 0xFF0023, 0x122001F, 0x141001B,
- 0x15D0019, 0x1760017, 0x18E0015, 0x1A30015, 0x1B80013, 0x1CC0012,
- 0x1DE0011, 0x1F00010, 0x2010010, 0x2110010, 0x221000F, 0x230000F,
- 0x23F000E, 0x24D000E, 0x25B000D, 0x269000C, 0x276000C, 0x283000C,
- 0x28F000C, 0x29B000C, 0x2A7000C, 0x2B3000B, 0x2BF000B, 0x2CA000B,
- 0x2D5000B, 0x2E0000A, 0x2EB000A, 0x2F5000A, 0x2FF000A, 0x30A000A,
- 0x3140009, 0x31E0009, 0x327000A, 0x3310009, 0x33A0009, 0x3440009,
- 0x34D0009, 0x3560009, 0x35F0009, 0x3680008, 0x3710008, 0x3790009,
- 0x3820008, 0x38A0008, 0x3930008, 0x39B0008, 0x3A30008, 0x3AB0008,
- 0x3B30008, 0x3BB0008, 0x3C30008, 0x3CB0007, 0x3D20008, 0x3DA0007,
- 0x3E20007, 0x3E90007, 0x3F00008, 0x3F80007 },
-};
-
-#define ISC_IS_FORMAT_RAW(mbus_code) \
- (((mbus_code) & 0xf000) == 0x3000)
-
-static unsigned int debug;
-module_param(debug, int, 0644);
-MODULE_PARM_DESC(debug, "debug level (0-2)");
-
-static unsigned int sensor_preferred = 1;
-module_param(sensor_preferred, uint, 0644);
-MODULE_PARM_DESC(sensor_preferred,
- "Sensor is preferred to output the specified format (1-on 0-off), default 1");
-
-static inline void isc_update_awb_ctrls(struct isc_device *isc)
-{
- struct isc_ctrls *ctrls = &isc->ctrls;
-
- regmap_write(isc->regmap, ISC_WB_O_RGR,
- (ISC_WB_O_ZERO_VAL - (ctrls->offset[ISC_HIS_CFG_MODE_R])) |
- ((ISC_WB_O_ZERO_VAL - ctrls->offset[ISC_HIS_CFG_MODE_GR]) << 16));
- regmap_write(isc->regmap, ISC_WB_O_BGB,
- (ISC_WB_O_ZERO_VAL - (ctrls->offset[ISC_HIS_CFG_MODE_B])) |
- ((ISC_WB_O_ZERO_VAL - ctrls->offset[ISC_HIS_CFG_MODE_GB]) << 16));
- regmap_write(isc->regmap, ISC_WB_G_RGR,
- ctrls->gain[ISC_HIS_CFG_MODE_R] |
- (ctrls->gain[ISC_HIS_CFG_MODE_GR] << 16));
- regmap_write(isc->regmap, ISC_WB_G_BGB,
- ctrls->gain[ISC_HIS_CFG_MODE_B] |
- (ctrls->gain[ISC_HIS_CFG_MODE_GB] << 16));
-}
-
-static inline void isc_reset_awb_ctrls(struct isc_device *isc)
-{
- int c;
-
- for (c = ISC_HIS_CFG_MODE_GR; c <= ISC_HIS_CFG_MODE_B; c++) {
- /* gains have a fixed point at 9 decimals */
- isc->ctrls.gain[c] = 1 << 9;
- /* offsets are in 2's complements, the value
- * will be substracted from ISC_WB_O_ZERO_VAL to obtain
- * 2's complement of a value between 0 and
- * ISC_WB_O_ZERO_VAL >> 1
- */
- isc->ctrls.offset[c] = ISC_WB_O_ZERO_VAL;
- }
-}
-
-static int isc_wait_clk_stable(struct clk_hw *hw)
-{
- struct isc_clk *isc_clk = to_isc_clk(hw);
- struct regmap *regmap = isc_clk->regmap;
- unsigned long timeout = jiffies + usecs_to_jiffies(1000);
- unsigned int status;
-
- while (time_before(jiffies, timeout)) {
- regmap_read(regmap, ISC_CLKSR, &status);
- if (!(status & ISC_CLKSR_SIP))
- return 0;
-
- usleep_range(10, 250);
- }
-
- return -ETIMEDOUT;
-}
-
-static int isc_clk_prepare(struct clk_hw *hw)
-{
- struct isc_clk *isc_clk = to_isc_clk(hw);
-
- if (isc_clk->id == ISC_ISPCK)
- pm_runtime_get_sync(isc_clk->dev);
-
- return isc_wait_clk_stable(hw);
-}
-
-static void isc_clk_unprepare(struct clk_hw *hw)
-{
- struct isc_clk *isc_clk = to_isc_clk(hw);
-
- isc_wait_clk_stable(hw);
-
- if (isc_clk->id == ISC_ISPCK)
- pm_runtime_put_sync(isc_clk->dev);
-}
-
-static int isc_clk_enable(struct clk_hw *hw)
-{
- struct isc_clk *isc_clk = to_isc_clk(hw);
- u32 id = isc_clk->id;
- struct regmap *regmap = isc_clk->regmap;
- unsigned long flags;
- unsigned int status;
-
- dev_dbg(isc_clk->dev, "ISC CLK: %s, div = %d, parent id = %d\n",
- __func__, isc_clk->div, isc_clk->parent_id);
-
- spin_lock_irqsave(&isc_clk->lock, flags);
- regmap_update_bits(regmap, ISC_CLKCFG,
- ISC_CLKCFG_DIV_MASK(id) | ISC_CLKCFG_SEL_MASK(id),
- (isc_clk->div << ISC_CLKCFG_DIV_SHIFT(id)) |
- (isc_clk->parent_id << ISC_CLKCFG_SEL_SHIFT(id)));
-
- regmap_write(regmap, ISC_CLKEN, ISC_CLK(id));
- spin_unlock_irqrestore(&isc_clk->lock, flags);
-
- regmap_read(regmap, ISC_CLKSR, &status);
- if (status & ISC_CLK(id))
- return 0;
- else
- return -EINVAL;
-}
-
-static void isc_clk_disable(struct clk_hw *hw)
-{
- struct isc_clk *isc_clk = to_isc_clk(hw);
- u32 id = isc_clk->id;
- unsigned long flags;
-
- spin_lock_irqsave(&isc_clk->lock, flags);
- regmap_write(isc_clk->regmap, ISC_CLKDIS, ISC_CLK(id));
- spin_unlock_irqrestore(&isc_clk->lock, flags);
-}
-
-static int isc_clk_is_enabled(struct clk_hw *hw)
-{
- struct isc_clk *isc_clk = to_isc_clk(hw);
- u32 status;
-
- if (isc_clk->id == ISC_ISPCK)
- pm_runtime_get_sync(isc_clk->dev);
-
- regmap_read(isc_clk->regmap, ISC_CLKSR, &status);
-
- if (isc_clk->id == ISC_ISPCK)
- pm_runtime_put_sync(isc_clk->dev);
-
- return status & ISC_CLK(isc_clk->id) ? 1 : 0;
-}
-
-static unsigned long
-isc_clk_recalc_rate(struct clk_hw *hw, unsigned long parent_rate)
-{
- struct isc_clk *isc_clk = to_isc_clk(hw);
-
- return DIV_ROUND_CLOSEST(parent_rate, isc_clk->div + 1);
-}
-
-static int isc_clk_determine_rate(struct clk_hw *hw,
- struct clk_rate_request *req)
-{
- struct isc_clk *isc_clk = to_isc_clk(hw);
- long best_rate = -EINVAL;
- int best_diff = -1;
- unsigned int i, div;
-
- for (i = 0; i < clk_hw_get_num_parents(hw); i++) {
- struct clk_hw *parent;
- unsigned long parent_rate;
-
- parent = clk_hw_get_parent_by_index(hw, i);
- if (!parent)
- continue;
-
- parent_rate = clk_hw_get_rate(parent);
- if (!parent_rate)
- continue;
-
- for (div = 1; div < ISC_CLK_MAX_DIV + 2; div++) {
- unsigned long rate;
- int diff;
-
- rate = DIV_ROUND_CLOSEST(parent_rate, div);
- diff = abs(req->rate - rate);
-
- if (best_diff < 0 || best_diff > diff) {
- best_rate = rate;
- best_diff = diff;
- req->best_parent_rate = parent_rate;
- req->best_parent_hw = parent;
- }
-
- if (!best_diff || rate < req->rate)
- break;
- }
-
- if (!best_diff)
- break;
- }
-
- dev_dbg(isc_clk->dev,
- "ISC CLK: %s, best_rate = %ld, parent clk: %s @ %ld\n",
- __func__, best_rate,
- __clk_get_name((req->best_parent_hw)->clk),
- req->best_parent_rate);
-
- if (best_rate < 0)
- return best_rate;
-
- req->rate = best_rate;
-
- return 0;
-}
-
-static int isc_clk_set_parent(struct clk_hw *hw, u8 index)
-{
- struct isc_clk *isc_clk = to_isc_clk(hw);
-
- if (index >= clk_hw_get_num_parents(hw))
- return -EINVAL;
-
- isc_clk->parent_id = index;
-
- return 0;
-}
-
-static u8 isc_clk_get_parent(struct clk_hw *hw)
-{
- struct isc_clk *isc_clk = to_isc_clk(hw);
-
- return isc_clk->parent_id;
-}
-
-static int isc_clk_set_rate(struct clk_hw *hw,
- unsigned long rate,
- unsigned long parent_rate)
-{
- struct isc_clk *isc_clk = to_isc_clk(hw);
- u32 div;
-
- if (!rate)
- return -EINVAL;
-
- div = DIV_ROUND_CLOSEST(parent_rate, rate);
- if (div > (ISC_CLK_MAX_DIV + 1) || !div)
- return -EINVAL;
-
- isc_clk->div = div - 1;
-
- return 0;
-}
-
-static const struct clk_ops isc_clk_ops = {
- .prepare = isc_clk_prepare,
- .unprepare = isc_clk_unprepare,
- .enable = isc_clk_enable,
- .disable = isc_clk_disable,
- .is_enabled = isc_clk_is_enabled,
- .recalc_rate = isc_clk_recalc_rate,
- .determine_rate = isc_clk_determine_rate,
- .set_parent = isc_clk_set_parent,
- .get_parent = isc_clk_get_parent,
- .set_rate = isc_clk_set_rate,
-};
-
-static int isc_clk_register(struct isc_device *isc, unsigned int id)
-{
- struct regmap *regmap = isc->regmap;
- struct device_node *np = isc->dev->of_node;
- struct isc_clk *isc_clk;
- struct clk_init_data init;
- const char *clk_name = np->name;
- const char *parent_names[3];
- int num_parents;
-
- num_parents = of_clk_get_parent_count(np);
- if (num_parents < 1 || num_parents > 3)
- return -EINVAL;
-
- if (num_parents > 2 && id == ISC_ISPCK)
- num_parents = 2;
-
- of_clk_parent_fill(np, parent_names, num_parents);
-
- if (id == ISC_MCK)
- of_property_read_string(np, "clock-output-names", &clk_name);
- else
- clk_name = "isc-ispck";
-
- init.parent_names = parent_names;
- init.num_parents = num_parents;
- init.name = clk_name;
- init.ops = &isc_clk_ops;
- init.flags = CLK_SET_RATE_GATE | CLK_SET_PARENT_GATE;
-
- isc_clk = &isc->isc_clks[id];
- isc_clk->hw.init = &init;
- isc_clk->regmap = regmap;
- isc_clk->id = id;
- isc_clk->dev = isc->dev;
- spin_lock_init(&isc_clk->lock);
-
- isc_clk->clk = clk_register(isc->dev, &isc_clk->hw);
- if (IS_ERR(isc_clk->clk)) {
- dev_err(isc->dev, "%s: clock register fail\n", clk_name);
- return PTR_ERR(isc_clk->clk);
- } else if (id == ISC_MCK)
- of_clk_add_provider(np, of_clk_src_simple_get, isc_clk->clk);
-
- return 0;
-}
-
-static int isc_clk_init(struct isc_device *isc)
-{
- unsigned int i;
- int ret;
-
- for (i = 0; i < ARRAY_SIZE(isc->isc_clks); i++)
- isc->isc_clks[i].clk = ERR_PTR(-EINVAL);
-
- for (i = 0; i < ARRAY_SIZE(isc->isc_clks); i++) {
- ret = isc_clk_register(isc, i);
- if (ret)
- return ret;
- }
-
- return 0;
-}
-
-static void isc_clk_cleanup(struct isc_device *isc)
-{
- unsigned int i;
-
- of_clk_del_provider(isc->dev->of_node);
-
- for (i = 0; i < ARRAY_SIZE(isc->isc_clks); i++) {
- struct isc_clk *isc_clk = &isc->isc_clks[i];
-
- if (!IS_ERR(isc_clk->clk))
- clk_unregister(isc_clk->clk);
- }
-}
-
-static int isc_queue_setup(struct vb2_queue *vq,
- unsigned int *nbuffers, unsigned int *nplanes,
- unsigned int sizes[], struct device *alloc_devs[])
-{
- struct isc_device *isc = vb2_get_drv_priv(vq);
- unsigned int size = isc->fmt.fmt.pix.sizeimage;
-
- if (*nplanes)
- return sizes[0] < size ? -EINVAL : 0;
-
- *nplanes = 1;
- sizes[0] = size;
-
- return 0;
-}
-
-static int isc_buffer_prepare(struct vb2_buffer *vb)
-{
- struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
- struct isc_device *isc = vb2_get_drv_priv(vb->vb2_queue);
- unsigned long size = isc->fmt.fmt.pix.sizeimage;
-
- if (vb2_plane_size(vb, 0) < size) {
- v4l2_err(&isc->v4l2_dev, "buffer too small (%lu < %lu)\n",
- vb2_plane_size(vb, 0), size);
- return -EINVAL;
- }
-
- vb2_set_plane_payload(vb, 0, size);
-
- vbuf->field = isc->fmt.fmt.pix.field;
-
- return 0;
-}
-
-static void isc_start_dma(struct isc_device *isc)
-{
- struct regmap *regmap = isc->regmap;
- u32 sizeimage = isc->fmt.fmt.pix.sizeimage;
- u32 dctrl_dview;
- dma_addr_t addr0;
- u32 h, w;
-
- h = isc->fmt.fmt.pix.height;
- w = isc->fmt.fmt.pix.width;
-
- /*
- * In case the sensor is not RAW, it will output a pixel (12-16 bits)
- * with two samples on the ISC Data bus (which is 8-12)
- * ISC will count each sample, so, we need to multiply these values
- * by two, to get the real number of samples for the required pixels.
- */
- if (!ISC_IS_FORMAT_RAW(isc->config.sd_format->mbus_code)) {
- h <<= 1;
- w <<= 1;
- }
-
- /*
- * We limit the column/row count that the ISC will output according
- * to the configured resolution that we want.
- * This will avoid the situation where the sensor is misconfigured,
- * sending more data, and the ISC will just take it and DMA to memory,
- * causing corruption.
- */
- regmap_write(regmap, ISC_PFE_CFG1,
- (ISC_PFE_CFG1_COLMIN(0) & ISC_PFE_CFG1_COLMIN_MASK) |
- (ISC_PFE_CFG1_COLMAX(w - 1) & ISC_PFE_CFG1_COLMAX_MASK));
-
- regmap_write(regmap, ISC_PFE_CFG2,
- (ISC_PFE_CFG2_ROWMIN(0) & ISC_PFE_CFG2_ROWMIN_MASK) |
- (ISC_PFE_CFG2_ROWMAX(h - 1) & ISC_PFE_CFG2_ROWMAX_MASK));
-
- regmap_update_bits(regmap, ISC_PFE_CFG0,
- ISC_PFE_CFG0_COLEN | ISC_PFE_CFG0_ROWEN,
- ISC_PFE_CFG0_COLEN | ISC_PFE_CFG0_ROWEN);
-
- addr0 = vb2_dma_contig_plane_dma_addr(&isc->cur_frm->vb.vb2_buf, 0);
- regmap_write(regmap, ISC_DAD0, addr0);
-
- switch (isc->config.fourcc) {
- case V4L2_PIX_FMT_YUV420:
- regmap_write(regmap, ISC_DAD1, addr0 + (sizeimage * 2) / 3);
- regmap_write(regmap, ISC_DAD2, addr0 + (sizeimage * 5) / 6);
- break;
- case V4L2_PIX_FMT_YUV422P:
- regmap_write(regmap, ISC_DAD1, addr0 + sizeimage / 2);
- regmap_write(regmap, ISC_DAD2, addr0 + (sizeimage * 3) / 4);
- break;
- default:
- break;
- }
-
- dctrl_dview = isc->config.dctrl_dview;
-
- regmap_write(regmap, ISC_DCTRL, dctrl_dview | ISC_DCTRL_IE_IS);
- spin_lock(&isc->awb_lock);
- regmap_write(regmap, ISC_CTRLEN, ISC_CTRL_CAPTURE);
- spin_unlock(&isc->awb_lock);
-}
-
-static void isc_set_pipeline(struct isc_device *isc, u32 pipeline)
-{
- struct regmap *regmap = isc->regmap;
- struct isc_ctrls *ctrls = &isc->ctrls;
- u32 val, bay_cfg;
- const u32 *gamma;
- unsigned int i;
-
- /* WB-->CFA-->CC-->GAM-->CSC-->CBC-->SUB422-->SUB420 */
- for (i = 0; i < ISC_PIPE_LINE_NODE_NUM; i++) {
- val = pipeline & BIT(i) ? 1 : 0;
- regmap_field_write(isc->pipeline[i], val);
- }
-
- if (!pipeline)
- return;
-
- bay_cfg = isc->config.sd_format->cfa_baycfg;
-
- if (ctrls->awb == ISC_WB_NONE)
- isc_reset_awb_ctrls(isc);
-
- regmap_write(regmap, ISC_WB_CFG, bay_cfg);
- isc_update_awb_ctrls(isc);
-
- regmap_write(regmap, ISC_CFA_CFG, bay_cfg | ISC_CFA_CFG_EITPOL);
-
- gamma = &isc_gamma_table[ctrls->gamma_index][0];
- regmap_bulk_write(regmap, ISC_GAM_BENTRY, gamma, GAMMA_ENTRIES);
- regmap_bulk_write(regmap, ISC_GAM_GENTRY, gamma, GAMMA_ENTRIES);
- regmap_bulk_write(regmap, ISC_GAM_RENTRY, gamma, GAMMA_ENTRIES);
-
- /* Convert RGB to YUV */
- regmap_write(regmap, ISC_CSC_YR_YG, 0x42 | (0x81 << 16));
- regmap_write(regmap, ISC_CSC_YB_OY, 0x19 | (0x10 << 16));
- regmap_write(regmap, ISC_CSC_CBR_CBG, 0xFDA | (0xFB6 << 16));
- regmap_write(regmap, ISC_CSC_CBB_OCB, 0x70 | (0x80 << 16));
- regmap_write(regmap, ISC_CSC_CRR_CRG, 0x70 | (0xFA2 << 16));
- regmap_write(regmap, ISC_CSC_CRB_OCR, 0xFEE | (0x80 << 16));
-
- regmap_write(regmap, ISC_CBC_BRIGHT, ctrls->brightness);
- regmap_write(regmap, ISC_CBC_CONTRAST, ctrls->contrast);
-}
-
-static int isc_update_profile(struct isc_device *isc)
-{
- struct regmap *regmap = isc->regmap;
- u32 sr;
- int counter = 100;
-
- regmap_write(regmap, ISC_CTRLEN, ISC_CTRL_UPPRO);
-
- regmap_read(regmap, ISC_CTRLSR, &sr);
- while ((sr & ISC_CTRL_UPPRO) && counter--) {
- usleep_range(1000, 2000);
- regmap_read(regmap, ISC_CTRLSR, &sr);
- }
-
- if (counter < 0) {
- v4l2_warn(&isc->v4l2_dev, "Time out to update profile\n");
- return -ETIMEDOUT;
- }
-
- return 0;
-}
-
-static void isc_set_histogram(struct isc_device *isc, bool enable)
-{
- struct regmap *regmap = isc->regmap;
- struct isc_ctrls *ctrls = &isc->ctrls;
-
- if (enable) {
- regmap_write(regmap, ISC_HIS_CFG,
- ISC_HIS_CFG_MODE_GR |
- (isc->config.sd_format->cfa_baycfg
- << ISC_HIS_CFG_BAYSEL_SHIFT) |
- ISC_HIS_CFG_RAR);
- regmap_write(regmap, ISC_HIS_CTRL, ISC_HIS_CTRL_EN);
- regmap_write(regmap, ISC_INTEN, ISC_INT_HISDONE);
- ctrls->hist_id = ISC_HIS_CFG_MODE_GR;
- isc_update_profile(isc);
- regmap_write(regmap, ISC_CTRLEN, ISC_CTRL_HISREQ);
-
- ctrls->hist_stat = HIST_ENABLED;
- } else {
- regmap_write(regmap, ISC_INTDIS, ISC_INT_HISDONE);
- regmap_write(regmap, ISC_HIS_CTRL, ISC_HIS_CTRL_DIS);
-
- ctrls->hist_stat = HIST_DISABLED;
- }
-}
-
-static int isc_configure(struct isc_device *isc)
-{
- struct regmap *regmap = isc->regmap;
- u32 pfe_cfg0, rlp_mode, dcfg, mask, pipeline;
- struct isc_subdev_entity *subdev = isc->current_subdev;
-
- pfe_cfg0 = isc->config.sd_format->pfe_cfg0_bps;
- rlp_mode = isc->config.rlp_cfg_mode;
- pipeline = isc->config.bits_pipeline;
-
- dcfg = isc->config.dcfg_imode |
- ISC_DCFG_YMBSIZE_BEATS8 | ISC_DCFG_CMBSIZE_BEATS8;
-
- pfe_cfg0 |= subdev->pfe_cfg0 | ISC_PFE_CFG0_MODE_PROGRESSIVE;
- mask = ISC_PFE_CFG0_BPS_MASK | ISC_PFE_CFG0_HPOL_LOW |
- ISC_PFE_CFG0_VPOL_LOW | ISC_PFE_CFG0_PPOL_LOW |
- ISC_PFE_CFG0_MODE_MASK | ISC_PFE_CFG0_CCIR_CRC |
- ISC_PFE_CFG0_CCIR656;
-
- regmap_update_bits(regmap, ISC_PFE_CFG0, mask, pfe_cfg0);
-
- regmap_update_bits(regmap, ISC_RLP_CFG, ISC_RLP_CFG_MODE_MASK,
- rlp_mode);
-
- regmap_write(regmap, ISC_DCFG, dcfg);
-
- /* Set the pipeline */
- isc_set_pipeline(isc, pipeline);
-
- /*
- * The current implemented histogram is available for RAW R, B, GB, GR
- * channels. We need to check if sensor is outputting RAW BAYER
- */
- if (isc->ctrls.awb &&
- ISC_IS_FORMAT_RAW(isc->config.sd_format->mbus_code))
- isc_set_histogram(isc, true);
- else
- isc_set_histogram(isc, false);
-
- /* Update profile */
- return isc_update_profile(isc);
-}
-
-static int isc_start_streaming(struct vb2_queue *vq, unsigned int count)
-{
- struct isc_device *isc = vb2_get_drv_priv(vq);
- struct regmap *regmap = isc->regmap;
- struct isc_buffer *buf;
- unsigned long flags;
- int ret;
-
- /* Enable stream on the sub device */
- ret = v4l2_subdev_call(isc->current_subdev->sd, video, s_stream, 1);
- if (ret && ret != -ENOIOCTLCMD) {
- v4l2_err(&isc->v4l2_dev, "stream on failed in subdev %d\n",
- ret);
- goto err_start_stream;
- }
-
- pm_runtime_get_sync(isc->dev);
-
- ret = isc_configure(isc);
- if (unlikely(ret))
- goto err_configure;
-
- /* Enable DMA interrupt */
- regmap_write(regmap, ISC_INTEN, ISC_INT_DDONE);
-
- spin_lock_irqsave(&isc->dma_queue_lock, flags);
-
- isc->sequence = 0;
- isc->stop = false;
- reinit_completion(&isc->comp);
-
- isc->cur_frm = list_first_entry(&isc->dma_queue,
- struct isc_buffer, list);
- list_del(&isc->cur_frm->list);
-
- isc_start_dma(isc);
-
- spin_unlock_irqrestore(&isc->dma_queue_lock, flags);
-
- /* if we streaming from RAW, we can do one-shot white balance adj */
- if (ISC_IS_FORMAT_RAW(isc->config.sd_format->mbus_code))
- v4l2_ctrl_activate(isc->do_wb_ctrl, true);
-
- return 0;
-
-err_configure:
- pm_runtime_put_sync(isc->dev);
-
- v4l2_subdev_call(isc->current_subdev->sd, video, s_stream, 0);
-
-err_start_stream:
- spin_lock_irqsave(&isc->dma_queue_lock, flags);
- list_for_each_entry(buf, &isc->dma_queue, list)
- vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_QUEUED);
- INIT_LIST_HEAD(&isc->dma_queue);
- spin_unlock_irqrestore(&isc->dma_queue_lock, flags);
-
- return ret;
-}
-
-static void isc_stop_streaming(struct vb2_queue *vq)
-{
- struct isc_device *isc = vb2_get_drv_priv(vq);
- unsigned long flags;
- struct isc_buffer *buf;
- int ret;
-
- v4l2_ctrl_activate(isc->do_wb_ctrl, false);
-
- isc->stop = true;
-
- /* Wait until the end of the current frame */
- if (isc->cur_frm && !wait_for_completion_timeout(&isc->comp, 5 * HZ))
- v4l2_err(&isc->v4l2_dev,
- "Timeout waiting for end of the capture\n");
-
- /* Disable DMA interrupt */
- regmap_write(isc->regmap, ISC_INTDIS, ISC_INT_DDONE);
-
- pm_runtime_put_sync(isc->dev);
-
- /* Disable stream on the sub device */
- ret = v4l2_subdev_call(isc->current_subdev->sd, video, s_stream, 0);
- if (ret && ret != -ENOIOCTLCMD)
- v4l2_err(&isc->v4l2_dev, "stream off failed in subdev\n");
-
- /* Release all active buffers */
- spin_lock_irqsave(&isc->dma_queue_lock, flags);
- if (unlikely(isc->cur_frm)) {
- vb2_buffer_done(&isc->cur_frm->vb.vb2_buf,
- VB2_BUF_STATE_ERROR);
- isc->cur_frm = NULL;
- }
- list_for_each_entry(buf, &isc->dma_queue, list)
- vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
- INIT_LIST_HEAD(&isc->dma_queue);
- spin_unlock_irqrestore(&isc->dma_queue_lock, flags);
-}
-
-static void isc_buffer_queue(struct vb2_buffer *vb)
-{
- struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
- struct isc_buffer *buf = container_of(vbuf, struct isc_buffer, vb);
- struct isc_device *isc = vb2_get_drv_priv(vb->vb2_queue);
- unsigned long flags;
-
- spin_lock_irqsave(&isc->dma_queue_lock, flags);
- if (!isc->cur_frm && list_empty(&isc->dma_queue) &&
- vb2_is_streaming(vb->vb2_queue)) {
- isc->cur_frm = buf;
- isc_start_dma(isc);
- } else
- list_add_tail(&buf->list, &isc->dma_queue);
- spin_unlock_irqrestore(&isc->dma_queue_lock, flags);
-}
-
-static struct isc_format *find_format_by_fourcc(struct isc_device *isc,
- unsigned int fourcc)
-{
- unsigned int num_formats = isc->num_user_formats;
- struct isc_format *fmt;
- unsigned int i;
-
- for (i = 0; i < num_formats; i++) {
- fmt = isc->user_formats[i];
- if (fmt->fourcc == fourcc)
- return fmt;
- }
-
- return NULL;
-}
-
-static const struct vb2_ops isc_vb2_ops = {
- .queue_setup = isc_queue_setup,
- .wait_prepare = vb2_ops_wait_prepare,
- .wait_finish = vb2_ops_wait_finish,
- .buf_prepare = isc_buffer_prepare,
- .start_streaming = isc_start_streaming,
- .stop_streaming = isc_stop_streaming,
- .buf_queue = isc_buffer_queue,
-};
-
-static int isc_querycap(struct file *file, void *priv,
- struct v4l2_capability *cap)
-{
- struct isc_device *isc = video_drvdata(file);
-
- strscpy(cap->driver, ATMEL_ISC_NAME, sizeof(cap->driver));
- strscpy(cap->card, "Atmel Image Sensor Controller", sizeof(cap->card));
- snprintf(cap->bus_info, sizeof(cap->bus_info),
- "platform:%s", isc->v4l2_dev.name);
-
- return 0;
-}
-
-static int isc_enum_fmt_vid_cap(struct file *file, void *priv,
- struct v4l2_fmtdesc *f)
-{
- u32 index = f->index;
- u32 i, supported_index;
-
- if (index < ARRAY_SIZE(controller_formats)) {
- f->pixelformat = controller_formats[index].fourcc;
- return 0;
- }
-
- index -= ARRAY_SIZE(controller_formats);
-
- i = 0;
- supported_index = 0;
-
- for (i = 0; i < ARRAY_SIZE(formats_list); i++) {
- if (!ISC_IS_FORMAT_RAW(formats_list[i].mbus_code) ||
- !formats_list[i].sd_support)
- continue;
- if (supported_index == index) {
- f->pixelformat = formats_list[i].fourcc;
- return 0;
- }
- supported_index++;
- }
-
- return -EINVAL;
-}
-
-static int isc_g_fmt_vid_cap(struct file *file, void *priv,
- struct v4l2_format *fmt)
-{
- struct isc_device *isc = video_drvdata(file);
-
- *fmt = isc->fmt;
-
- return 0;
-}
-
-/*
- * Checks the current configured format, if ISC can output it,
- * considering which type of format the ISC receives from the sensor
- */
-static int isc_try_validate_formats(struct isc_device *isc)
-{
- int ret;
- bool bayer = false, yuv = false, rgb = false, grey = false;
-
- /* all formats supported by the RLP module are OK */
- switch (isc->try_config.fourcc) {
- case V4L2_PIX_FMT_SBGGR8:
- case V4L2_PIX_FMT_SGBRG8:
- case V4L2_PIX_FMT_SGRBG8:
- case V4L2_PIX_FMT_SRGGB8:
- case V4L2_PIX_FMT_SBGGR10:
- case V4L2_PIX_FMT_SGBRG10:
- case V4L2_PIX_FMT_SGRBG10:
- case V4L2_PIX_FMT_SRGGB10:
- case V4L2_PIX_FMT_SBGGR12:
- case V4L2_PIX_FMT_SGBRG12:
- case V4L2_PIX_FMT_SGRBG12:
- case V4L2_PIX_FMT_SRGGB12:
- ret = 0;
- bayer = true;
- break;
-
- case V4L2_PIX_FMT_YUV420:
- case V4L2_PIX_FMT_YUV422P:
- case V4L2_PIX_FMT_YUYV:
- ret = 0;
- yuv = true;
- break;
-
- case V4L2_PIX_FMT_RGB565:
- case V4L2_PIX_FMT_ABGR32:
- case V4L2_PIX_FMT_XBGR32:
- case V4L2_PIX_FMT_ARGB444:
- case V4L2_PIX_FMT_ARGB555:
- ret = 0;
- rgb = true;
- break;
- case V4L2_PIX_FMT_GREY:
- ret = 0;
- grey = true;
- break;
- default:
- /* any other different formats are not supported */
- ret = -EINVAL;
- }
-
- /* we cannot output RAW/Grey if we do not receive RAW */
- if ((bayer || grey) &&
- !ISC_IS_FORMAT_RAW(isc->try_config.sd_format->mbus_code))
- return -EINVAL;
-
- v4l2_dbg(1, debug, &isc->v4l2_dev,
- "Format validation, requested rgb=%u, yuv=%u, grey=%u, bayer=%u\n",
- rgb, yuv, grey, bayer);
-
- return ret;
-}
-
-/*
- * Configures the RLP and DMA modules, depending on the output format
- * configured for the ISC.
- * If direct_dump == true, just dump raw data 8 bits.
- */
-static int isc_try_configure_rlp_dma(struct isc_device *isc, bool direct_dump)
-{
- if (direct_dump) {
- isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_DAT8;
- isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED8;
- isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED;
- isc->try_config.bpp = 16;
- return 0;
- }
-
- switch (isc->try_config.fourcc) {
- case V4L2_PIX_FMT_SBGGR8:
- case V4L2_PIX_FMT_SGBRG8:
- case V4L2_PIX_FMT_SGRBG8:
- case V4L2_PIX_FMT_SRGGB8:
- isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_DAT8;
- isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED8;
- isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED;
- isc->try_config.bpp = 8;
- break;
- case V4L2_PIX_FMT_SBGGR10:
- case V4L2_PIX_FMT_SGBRG10:
- case V4L2_PIX_FMT_SGRBG10:
- case V4L2_PIX_FMT_SRGGB10:
- isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_DAT10;
- isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED16;
- isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED;
- isc->try_config.bpp = 16;
- break;
- case V4L2_PIX_FMT_SBGGR12:
- case V4L2_PIX_FMT_SGBRG12:
- case V4L2_PIX_FMT_SGRBG12:
- case V4L2_PIX_FMT_SRGGB12:
- isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_DAT12;
- isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED16;
- isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED;
- isc->try_config.bpp = 16;
- break;
- case V4L2_PIX_FMT_RGB565:
- isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_RGB565;
- isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED16;
- isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED;
- isc->try_config.bpp = 16;
- break;
- case V4L2_PIX_FMT_ARGB444:
- isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_ARGB444;
- isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED16;
- isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED;
- isc->try_config.bpp = 16;
- break;
- case V4L2_PIX_FMT_ARGB555:
- isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_ARGB555;
- isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED16;
- isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED;
- isc->try_config.bpp = 16;
- break;
- case V4L2_PIX_FMT_ABGR32:
- case V4L2_PIX_FMT_XBGR32:
- isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_ARGB32;
- isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED32;
- isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED;
- isc->try_config.bpp = 32;
- break;
- case V4L2_PIX_FMT_YUV420:
- isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_YYCC;
- isc->try_config.dcfg_imode = ISC_DCFG_IMODE_YC420P;
- isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PLANAR;
- isc->try_config.bpp = 12;
- break;
- case V4L2_PIX_FMT_YUV422P:
- isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_YYCC;
- isc->try_config.dcfg_imode = ISC_DCFG_IMODE_YC422P;
- isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PLANAR;
- isc->try_config.bpp = 16;
- break;
- case V4L2_PIX_FMT_YUYV:
- isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_YYCC;
- isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED32;
- isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED;
- isc->try_config.bpp = 16;
- break;
- case V4L2_PIX_FMT_GREY:
- isc->try_config.rlp_cfg_mode = ISC_RLP_CFG_MODE_DATY8;
- isc->try_config.dcfg_imode = ISC_DCFG_IMODE_PACKED8;
- isc->try_config.dctrl_dview = ISC_DCTRL_DVIEW_PACKED;
- isc->try_config.bpp = 8;
- break;
- default:
- return -EINVAL;
- }
- return 0;
-}
-
-/*
- * Configuring pipeline modules, depending on which format the ISC outputs
- * and considering which format it has as input from the sensor.
- */
-static int isc_try_configure_pipeline(struct isc_device *isc)
-{
- switch (isc->try_config.fourcc) {
- case V4L2_PIX_FMT_RGB565:
- case V4L2_PIX_FMT_ARGB555:
- case V4L2_PIX_FMT_ARGB444:
- case V4L2_PIX_FMT_ABGR32:
- case V4L2_PIX_FMT_XBGR32:
- /* if sensor format is RAW, we convert inside ISC */
- if (ISC_IS_FORMAT_RAW(isc->try_config.sd_format->mbus_code)) {
- isc->try_config.bits_pipeline = CFA_ENABLE |
- WB_ENABLE | GAM_ENABLES;
- } else {
- isc->try_config.bits_pipeline = 0x0;
- }
- break;
- case V4L2_PIX_FMT_YUV420:
- /* if sensor format is RAW, we convert inside ISC */
- if (ISC_IS_FORMAT_RAW(isc->try_config.sd_format->mbus_code)) {
- isc->try_config.bits_pipeline = CFA_ENABLE |
- CSC_ENABLE | WB_ENABLE | GAM_ENABLES |
- SUB420_ENABLE | SUB422_ENABLE | CBC_ENABLE;
- } else {
- isc->try_config.bits_pipeline = 0x0;
- }
- break;
- case V4L2_PIX_FMT_YUV422P:
- /* if sensor format is RAW, we convert inside ISC */
- if (ISC_IS_FORMAT_RAW(isc->try_config.sd_format->mbus_code)) {
- isc->try_config.bits_pipeline = CFA_ENABLE |
- CSC_ENABLE | WB_ENABLE | GAM_ENABLES |
- SUB422_ENABLE | CBC_ENABLE;
- } else {
- isc->try_config.bits_pipeline = 0x0;
- }
- break;
- case V4L2_PIX_FMT_YUYV:
- /* if sensor format is RAW, we convert inside ISC */
- if (ISC_IS_FORMAT_RAW(isc->try_config.sd_format->mbus_code)) {
- isc->try_config.bits_pipeline = CFA_ENABLE |
- CSC_ENABLE | WB_ENABLE | GAM_ENABLES |
- SUB422_ENABLE | CBC_ENABLE;
- } else {
- isc->try_config.bits_pipeline = 0x0;
- }
- break;
- case V4L2_PIX_FMT_GREY:
- if (ISC_IS_FORMAT_RAW(isc->try_config.sd_format->mbus_code)) {
- /* if sensor format is RAW, we convert inside ISC */
- isc->try_config.bits_pipeline = CFA_ENABLE |
- CSC_ENABLE | WB_ENABLE | GAM_ENABLES |
- CBC_ENABLE;
- } else {
- isc->try_config.bits_pipeline = 0x0;
- }
- break;
- default:
- isc->try_config.bits_pipeline = 0x0;
- }
- return 0;
-}
-
-static int isc_try_fmt(struct isc_device *isc, struct v4l2_format *f,
- u32 *code)
-{
- int i;
- struct isc_format *sd_fmt = NULL, *direct_fmt = NULL;
- struct v4l2_pix_format *pixfmt = &f->fmt.pix;
- struct v4l2_subdev_pad_config pad_cfg;
- struct v4l2_subdev_format format = {
- .which = V4L2_SUBDEV_FORMAT_TRY,
- };
- u32 mbus_code;
- int ret;
- bool rlp_dma_direct_dump = false;
-
- if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
- return -EINVAL;
-
- /* Step 1: find a RAW format that is supported */
- for (i = 0; i < isc->num_user_formats; i++) {
- if (ISC_IS_FORMAT_RAW(isc->user_formats[i]->mbus_code)) {
- sd_fmt = isc->user_formats[i];
- break;
- }
- }
- /* Step 2: We can continue with this RAW format, or we can look
- * for better: maybe sensor supports directly what we need.
- */
- direct_fmt = find_format_by_fourcc(isc, pixfmt->pixelformat);
-
- /* Step 3: We have both. We decide given the module parameter which
- * one to use.
- */
- if (direct_fmt && sd_fmt && sensor_preferred)
- sd_fmt = direct_fmt;
-
- /* Step 4: we do not have RAW but we have a direct format. Use it. */
- if (direct_fmt && !sd_fmt)
- sd_fmt = direct_fmt;
-
- /* Step 5: if we are using a direct format, we need to package
- * everything as 8 bit data and just dump it
- */
- if (sd_fmt == direct_fmt)
- rlp_dma_direct_dump = true;
-
- /* Step 6: We have no format. This can happen if the userspace
- * requests some weird/invalid format.
- * In this case, default to whatever we have
- */
- if (!sd_fmt && !direct_fmt) {
- sd_fmt = isc->user_formats[isc->num_user_formats - 1];
- v4l2_dbg(1, debug, &isc->v4l2_dev,
- "Sensor not supporting %.4s, using %.4s\n",
- (char *)&pixfmt->pixelformat, (char *)&sd_fmt->fourcc);
- }
-
- if (!sd_fmt) {
- ret = -EINVAL;
- goto isc_try_fmt_err;
- }
-
- /* Step 7: Print out what we decided for debugging */
- v4l2_dbg(1, debug, &isc->v4l2_dev,
- "Preferring to have sensor using format %.4s\n",
- (char *)&sd_fmt->fourcc);
-
- /* Step 8: at this moment we decided which format the subdev will use */
- isc->try_config.sd_format = sd_fmt;
-
- /* Limit to Atmel ISC hardware capabilities */
- if (pixfmt->width > ISC_MAX_SUPPORT_WIDTH)
- pixfmt->width = ISC_MAX_SUPPORT_WIDTH;
- if (pixfmt->height > ISC_MAX_SUPPORT_HEIGHT)
- pixfmt->height = ISC_MAX_SUPPORT_HEIGHT;
-
- /*
- * The mbus format is the one the subdev outputs.
- * The pixels will be transferred in this format Sensor -> ISC
- */
- mbus_code = sd_fmt->mbus_code;
-
- /*
- * Validate formats. If the required format is not OK, default to raw.
- */
-
- isc->try_config.fourcc = pixfmt->pixelformat;
-
- if (isc_try_validate_formats(isc)) {
- pixfmt->pixelformat = isc->try_config.fourcc = sd_fmt->fourcc;
- /* Re-try to validate the new format */
- ret = isc_try_validate_formats(isc);
- if (ret)
- goto isc_try_fmt_err;
- }
-
- ret = isc_try_configure_rlp_dma(isc, rlp_dma_direct_dump);
- if (ret)
- goto isc_try_fmt_err;
-
- ret = isc_try_configure_pipeline(isc);
- if (ret)
- goto isc_try_fmt_err;
-
- v4l2_fill_mbus_format(&format.format, pixfmt, mbus_code);
- ret = v4l2_subdev_call(isc->current_subdev->sd, pad, set_fmt,
- &pad_cfg, &format);
- if (ret < 0)
- goto isc_try_fmt_subdev_err;
-
- v4l2_fill_pix_format(pixfmt, &format.format);
-
- pixfmt->field = V4L2_FIELD_NONE;
- pixfmt->bytesperline = (pixfmt->width * isc->try_config.bpp) >> 3;
- pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
-
- if (code)
- *code = mbus_code;
-
- return 0;
-
-isc_try_fmt_err:
- v4l2_err(&isc->v4l2_dev, "Could not find any possible format for a working pipeline\n");
-isc_try_fmt_subdev_err:
- memset(&isc->try_config, 0, sizeof(isc->try_config));
-
- return ret;
-}
-
-static int isc_set_fmt(struct isc_device *isc, struct v4l2_format *f)
-{
- struct v4l2_subdev_format format = {
- .which = V4L2_SUBDEV_FORMAT_ACTIVE,
- };
- u32 mbus_code = 0;
- int ret;
-
- ret = isc_try_fmt(isc, f, &mbus_code);
- if (ret)
- return ret;
-
- v4l2_fill_mbus_format(&format.format, &f->fmt.pix, mbus_code);
- ret = v4l2_subdev_call(isc->current_subdev->sd, pad,
- set_fmt, NULL, &format);
- if (ret < 0)
- return ret;
-
- isc->fmt = *f;
-
- if (isc->try_config.sd_format && isc->config.sd_format &&
- isc->try_config.sd_format != isc->config.sd_format) {
- isc->ctrls.hist_stat = HIST_INIT;
- isc_reset_awb_ctrls(isc);
- }
- /* make the try configuration active */
- isc->config = isc->try_config;
-
- v4l2_dbg(1, debug, &isc->v4l2_dev, "New ISC configuration in place\n");
-
- return 0;
-}
-
-static int isc_s_fmt_vid_cap(struct file *file, void *priv,
- struct v4l2_format *f)
-{
- struct isc_device *isc = video_drvdata(file);
-
- if (vb2_is_streaming(&isc->vb2_vidq))
- return -EBUSY;
-
- return isc_set_fmt(isc, f);
-}
-
-static int isc_try_fmt_vid_cap(struct file *file, void *priv,
- struct v4l2_format *f)
-{
- struct isc_device *isc = video_drvdata(file);
-
- return isc_try_fmt(isc, f, NULL);
-}
-
-static int isc_enum_input(struct file *file, void *priv,
- struct v4l2_input *inp)
-{
- if (inp->index != 0)
- return -EINVAL;
-
- inp->type = V4L2_INPUT_TYPE_CAMERA;
- inp->std = 0;
- strscpy(inp->name, "Camera", sizeof(inp->name));
-
- return 0;
-}
-
-static int isc_g_input(struct file *file, void *priv, unsigned int *i)
-{
- *i = 0;
-
- return 0;
-}
-
-static int isc_s_input(struct file *file, void *priv, unsigned int i)
-{
- if (i > 0)
- return -EINVAL;
-
- return 0;
-}
-
-static int isc_g_parm(struct file *file, void *fh, struct v4l2_streamparm *a)
-{
- struct isc_device *isc = video_drvdata(file);
-
- return v4l2_g_parm_cap(video_devdata(file), isc->current_subdev->sd, a);
-}
-
-static int isc_s_parm(struct file *file, void *fh, struct v4l2_streamparm *a)
-{
- struct isc_device *isc = video_drvdata(file);
-
- return v4l2_s_parm_cap(video_devdata(file), isc->current_subdev->sd, a);
-}
-
-static int isc_enum_framesizes(struct file *file, void *fh,
- struct v4l2_frmsizeenum *fsize)
-{
- struct isc_device *isc = video_drvdata(file);
- struct v4l2_subdev_frame_size_enum fse = {
- .index = fsize->index,
- .which = V4L2_SUBDEV_FORMAT_ACTIVE,
- };
- int ret = -EINVAL;
- int i;
-
- for (i = 0; i < isc->num_user_formats; i++)
- if (isc->user_formats[i]->fourcc == fsize->pixel_format)
- ret = 0;
-
- for (i = 0; i < ARRAY_SIZE(controller_formats); i++)
- if (controller_formats[i].fourcc == fsize->pixel_format)
- ret = 0;
-
- if (ret)
- return ret;
-
- ret = v4l2_subdev_call(isc->current_subdev->sd, pad, enum_frame_size,
- NULL, &fse);
- if (ret)
- return ret;
-
- fse.code = isc->config.sd_format->mbus_code;
-
- fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
- fsize->discrete.width = fse.max_width;
- fsize->discrete.height = fse.max_height;
-
- return 0;
-}
-
-static int isc_enum_frameintervals(struct file *file, void *fh,
- struct v4l2_frmivalenum *fival)
-{
- struct isc_device *isc = video_drvdata(file);
- struct v4l2_subdev_frame_interval_enum fie = {
- .index = fival->index,
- .width = fival->width,
- .height = fival->height,
- .which = V4L2_SUBDEV_FORMAT_ACTIVE,
- };
- int ret = -EINVAL;
- int i;
-
- for (i = 0; i < isc->num_user_formats; i++)
- if (isc->user_formats[i]->fourcc == fival->pixel_format)
- ret = 0;
-
- for (i = 0; i < ARRAY_SIZE(controller_formats); i++)
- if (controller_formats[i].fourcc == fival->pixel_format)
- ret = 0;
-
- if (ret)
- return ret;
-
- ret = v4l2_subdev_call(isc->current_subdev->sd, pad,
- enum_frame_interval, NULL, &fie);
- if (ret)
- return ret;
-
- fie.code = isc->config.sd_format->mbus_code;
- fival->type = V4L2_FRMIVAL_TYPE_DISCRETE;
- fival->discrete = fie.interval;
-
- return 0;
-}
-
-static const struct v4l2_ioctl_ops isc_ioctl_ops = {
- .vidioc_querycap = isc_querycap,
- .vidioc_enum_fmt_vid_cap = isc_enum_fmt_vid_cap,
- .vidioc_g_fmt_vid_cap = isc_g_fmt_vid_cap,
- .vidioc_s_fmt_vid_cap = isc_s_fmt_vid_cap,
- .vidioc_try_fmt_vid_cap = isc_try_fmt_vid_cap,
-
- .vidioc_enum_input = isc_enum_input,
- .vidioc_g_input = isc_g_input,
- .vidioc_s_input = isc_s_input,
-
- .vidioc_reqbufs = vb2_ioctl_reqbufs,
- .vidioc_querybuf = vb2_ioctl_querybuf,
- .vidioc_qbuf = vb2_ioctl_qbuf,
- .vidioc_expbuf = vb2_ioctl_expbuf,
- .vidioc_dqbuf = vb2_ioctl_dqbuf,
- .vidioc_create_bufs = vb2_ioctl_create_bufs,
- .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
- .vidioc_streamon = vb2_ioctl_streamon,
- .vidioc_streamoff = vb2_ioctl_streamoff,
-
- .vidioc_g_parm = isc_g_parm,
- .vidioc_s_parm = isc_s_parm,
- .vidioc_enum_framesizes = isc_enum_framesizes,
- .vidioc_enum_frameintervals = isc_enum_frameintervals,
-
- .vidioc_log_status = v4l2_ctrl_log_status,
- .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
- .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
-};
-
-static int isc_open(struct file *file)
-{
- struct isc_device *isc = video_drvdata(file);
- struct v4l2_subdev *sd = isc->current_subdev->sd;
- int ret;
-
- if (mutex_lock_interruptible(&isc->lock))
- return -ERESTARTSYS;
-
- ret = v4l2_fh_open(file);
- if (ret < 0)
- goto unlock;
-
- if (!v4l2_fh_is_singular_file(file))
- goto unlock;
-
- ret = v4l2_subdev_call(sd, core, s_power, 1);
- if (ret < 0 && ret != -ENOIOCTLCMD) {
- v4l2_fh_release(file);
- goto unlock;
- }
-
- ret = isc_set_fmt(isc, &isc->fmt);
- if (ret) {
- v4l2_subdev_call(sd, core, s_power, 0);
- v4l2_fh_release(file);
- }
-
-unlock:
- mutex_unlock(&isc->lock);
- return ret;
-}
-
-static int isc_release(struct file *file)
-{
- struct isc_device *isc = video_drvdata(file);
- struct v4l2_subdev *sd = isc->current_subdev->sd;
- bool fh_singular;
- int ret;
-
- mutex_lock(&isc->lock);
-
- fh_singular = v4l2_fh_is_singular_file(file);
-
- ret = _vb2_fop_release(file, NULL);
-
- if (fh_singular)
- v4l2_subdev_call(sd, core, s_power, 0);
-
- mutex_unlock(&isc->lock);
-
- return ret;
-}
-
-static const struct v4l2_file_operations isc_fops = {
- .owner = THIS_MODULE,
- .open = isc_open,
- .release = isc_release,
- .unlocked_ioctl = video_ioctl2,
- .read = vb2_fop_read,
- .mmap = vb2_fop_mmap,
- .poll = vb2_fop_poll,
-};
-
-static irqreturn_t isc_interrupt(int irq, void *dev_id)
-{
- struct isc_device *isc = (struct isc_device *)dev_id;
- struct regmap *regmap = isc->regmap;
- u32 isc_intsr, isc_intmask, pending;
- irqreturn_t ret = IRQ_NONE;
-
- regmap_read(regmap, ISC_INTSR, &isc_intsr);
- regmap_read(regmap, ISC_INTMASK, &isc_intmask);
-
- pending = isc_intsr & isc_intmask;
-
- if (likely(pending & ISC_INT_DDONE)) {
- spin_lock(&isc->dma_queue_lock);
- if (isc->cur_frm) {
- struct vb2_v4l2_buffer *vbuf = &isc->cur_frm->vb;
- struct vb2_buffer *vb = &vbuf->vb2_buf;
-
- vb->timestamp = ktime_get_ns();
- vbuf->sequence = isc->sequence++;
- vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
- isc->cur_frm = NULL;
- }
-
- if (!list_empty(&isc->dma_queue) && !isc->stop) {
- isc->cur_frm = list_first_entry(&isc->dma_queue,
- struct isc_buffer, list);
- list_del(&isc->cur_frm->list);
-
- isc_start_dma(isc);
- }
-
- if (isc->stop)
- complete(&isc->comp);
-
- ret = IRQ_HANDLED;
- spin_unlock(&isc->dma_queue_lock);
- }
-
- if (pending & ISC_INT_HISDONE) {
- schedule_work(&isc->awb_work);
- ret = IRQ_HANDLED;
- }
-
- return ret;
-}
-
-static void isc_hist_count(struct isc_device *isc, u32 *min, u32 *max)
-{
- struct regmap *regmap = isc->regmap;
- struct isc_ctrls *ctrls = &isc->ctrls;
- u32 *hist_count = &ctrls->hist_count[ctrls->hist_id];
- u32 *hist_entry = &ctrls->hist_entry[0];
- u32 i;
-
- *min = 0;
- *max = HIST_ENTRIES;
-
- regmap_bulk_read(regmap, ISC_HIS_ENTRY, hist_entry, HIST_ENTRIES);
-
- *hist_count = 0;
- /*
- * we deliberately ignore the end of the histogram,
- * the most white pixels
- */
- for (i = 1; i < HIST_ENTRIES; i++) {
- if (*hist_entry && !*min)
- *min = i;
- if (*hist_entry)
- *max = i;
- *hist_count += i * (*hist_entry++);
- }
-
- if (!*min)
- *min = 1;
-}
-
-static void isc_wb_update(struct isc_ctrls *ctrls)
-{
- u32 *hist_count = &ctrls->hist_count[0];
- u32 c, offset[4];
- u64 avg = 0;
- /* We compute two gains, stretch gain and grey world gain */
- u32 s_gain[4], gw_gain[4];
-
- /*
- * According to Grey World, we need to set gains for R/B to normalize
- * them towards the green channel.
- * Thus we want to keep Green as fixed and adjust only Red/Blue
- * Compute the average of the both green channels first
- */
- avg = (u64)hist_count[ISC_HIS_CFG_MODE_GR] +
- (u64)hist_count[ISC_HIS_CFG_MODE_GB];
- avg >>= 1;
-
- /* Green histogram is null, nothing to do */
- if (!avg)
- return;
-
- for (c = ISC_HIS_CFG_MODE_GR; c <= ISC_HIS_CFG_MODE_B; c++) {
- /*
- * the color offset is the minimum value of the histogram.
- * we stretch this color to the full range by substracting
- * this value from the color component.
- */
- offset[c] = ctrls->hist_minmax[c][HIST_MIN_INDEX];
- /*
- * The offset is always at least 1. If the offset is 1, we do
- * not need to adjust it, so our result must be zero.
- * the offset is computed in a histogram on 9 bits (0..512)
- * but the offset in register is based on
- * 12 bits pipeline (0..4096).
- * we need to shift with the 3 bits that the histogram is
- * ignoring
- */
- ctrls->offset[c] = (offset[c] - 1) << 3;
-
- /* the offset is then taken and converted to 2's complements */
- if (!ctrls->offset[c])
- ctrls->offset[c] = ISC_WB_O_ZERO_VAL;
-
- /*
- * the stretch gain is the total number of histogram bins
- * divided by the actual range of color component (Max - Min)
- * If we compute gain like this, the actual color component
- * will be stretched to the full histogram.
- * We need to shift 9 bits for precision, we have 9 bits for
- * decimals
- */
- s_gain[c] = (HIST_ENTRIES << 9) /
- (ctrls->hist_minmax[c][HIST_MAX_INDEX] -
- ctrls->hist_minmax[c][HIST_MIN_INDEX] + 1);
-
- /*
- * Now we have to compute the gain w.r.t. the average.
- * Add/lose gain to the component towards the average.
- * If it happens that the component is zero, use the
- * fixed point value : 1.0 gain.
- */
- if (hist_count[c])
- gw_gain[c] = div_u64(avg << 9, hist_count[c]);
- else
- gw_gain[c] = 1 << 9;
-
- /* multiply both gains and adjust for decimals */
- ctrls->gain[c] = s_gain[c] * gw_gain[c];
- ctrls->gain[c] >>= 9;
- }
-}
-
-static void isc_awb_work(struct work_struct *w)
-{
- struct isc_device *isc =
- container_of(w, struct isc_device, awb_work);
- struct regmap *regmap = isc->regmap;
- struct isc_ctrls *ctrls = &isc->ctrls;
- u32 hist_id = ctrls->hist_id;
- u32 baysel;
- unsigned long flags;
- u32 min, max;
-
- /* streaming is not active anymore */
- if (isc->stop)
- return;
-
- if (ctrls->hist_stat != HIST_ENABLED)
- return;
-
- isc_hist_count(isc, &min, &max);
- ctrls->hist_minmax[hist_id][HIST_MIN_INDEX] = min;
- ctrls->hist_minmax[hist_id][HIST_MAX_INDEX] = max;
-
- if (hist_id != ISC_HIS_CFG_MODE_B) {
- hist_id++;
- } else {
- isc_wb_update(ctrls);
- hist_id = ISC_HIS_CFG_MODE_GR;
- }
-
- ctrls->hist_id = hist_id;
- baysel = isc->config.sd_format->cfa_baycfg << ISC_HIS_CFG_BAYSEL_SHIFT;
-
- /* if no more auto white balance, reset controls. */
- if (ctrls->awb == ISC_WB_NONE)
- isc_reset_awb_ctrls(isc);
-
- pm_runtime_get_sync(isc->dev);
-
- /*
- * only update if we have all the required histograms and controls
- * if awb has been disabled, we need to reset registers as well.
- */
- if (hist_id == ISC_HIS_CFG_MODE_GR || ctrls->awb == ISC_WB_NONE) {
- /*
- * It may happen that DMA Done IRQ will trigger while we are
- * updating white balance registers here.
- * In that case, only parts of the controls have been updated.
- * We can avoid that by locking the section.
- */
- spin_lock_irqsave(&isc->awb_lock, flags);
- isc_update_awb_ctrls(isc);
- spin_unlock_irqrestore(&isc->awb_lock, flags);
-
- /*
- * if we are doing just the one time white balance adjustment,
- * we are basically done.
- */
- if (ctrls->awb == ISC_WB_ONETIME) {
- v4l2_info(&isc->v4l2_dev,
- "Completed one time white-balance adjustment.\n");
- ctrls->awb = ISC_WB_NONE;
- }
- }
- regmap_write(regmap, ISC_HIS_CFG, hist_id | baysel | ISC_HIS_CFG_RAR);
- isc_update_profile(isc);
- /* if awb has been disabled, we don't need to start another histogram */
- if (ctrls->awb)
- regmap_write(regmap, ISC_CTRLEN, ISC_CTRL_HISREQ);
-
- pm_runtime_put_sync(isc->dev);
-}
-
-static int isc_s_ctrl(struct v4l2_ctrl *ctrl)
-{
- struct isc_device *isc = container_of(ctrl->handler,
- struct isc_device, ctrls.handler);
- struct isc_ctrls *ctrls = &isc->ctrls;
-
- if (ctrl->flags & V4L2_CTRL_FLAG_INACTIVE)
- return 0;
-
- switch (ctrl->id) {
- case V4L2_CID_BRIGHTNESS:
- ctrls->brightness = ctrl->val & ISC_CBC_BRIGHT_MASK;
- break;
- case V4L2_CID_CONTRAST:
- ctrls->contrast = ctrl->val & ISC_CBC_CONTRAST_MASK;
- break;
- case V4L2_CID_GAMMA:
- ctrls->gamma_index = ctrl->val;
- break;
- case V4L2_CID_AUTO_WHITE_BALANCE:
- if (ctrl->val == 1)
- ctrls->awb = ISC_WB_AUTO;
- else
- ctrls->awb = ISC_WB_NONE;
-
- /* we did not configure ISC yet */
- if (!isc->config.sd_format)
- break;
-
- if (ctrls->hist_stat != HIST_ENABLED)
- isc_reset_awb_ctrls(isc);
-
- if (isc->ctrls.awb == ISC_WB_AUTO &&
- vb2_is_streaming(&isc->vb2_vidq) &&
- ISC_IS_FORMAT_RAW(isc->config.sd_format->mbus_code))
- isc_set_histogram(isc, true);
-
- break;
- case V4L2_CID_DO_WHITE_BALANCE:
- /* if AWB is enabled, do nothing */
- if (ctrls->awb == ISC_WB_AUTO)
- return 0;
-
- ctrls->awb = ISC_WB_ONETIME;
- isc_set_histogram(isc, true);
- v4l2_dbg(1, debug, &isc->v4l2_dev,
- "One time white-balance started.\n");
- break;
- default:
- return -EINVAL;
- }
-
- return 0;
-}
-
-static const struct v4l2_ctrl_ops isc_ctrl_ops = {
- .s_ctrl = isc_s_ctrl,
-};
-
-static int isc_ctrl_init(struct isc_device *isc)
-{
- const struct v4l2_ctrl_ops *ops = &isc_ctrl_ops;
- struct isc_ctrls *ctrls = &isc->ctrls;
- struct v4l2_ctrl_handler *hdl = &ctrls->handler;
- int ret;
-
- ctrls->hist_stat = HIST_INIT;
- isc_reset_awb_ctrls(isc);
-
- ret = v4l2_ctrl_handler_init(hdl, 5);
- if (ret < 0)
- return ret;
-
- ctrls->brightness = 0;
- ctrls->contrast = 256;
-
- v4l2_ctrl_new_std(hdl, ops, V4L2_CID_BRIGHTNESS, -1024, 1023, 1, 0);
- v4l2_ctrl_new_std(hdl, ops, V4L2_CID_CONTRAST, -2048, 2047, 1, 256);
- v4l2_ctrl_new_std(hdl, ops, V4L2_CID_GAMMA, 0, GAMMA_MAX, 1, 2);
- v4l2_ctrl_new_std(hdl, ops, V4L2_CID_AUTO_WHITE_BALANCE, 0, 1, 1, 1);
-
- /* do_white_balance is a button, so min,max,step,default are ignored */
- isc->do_wb_ctrl = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_DO_WHITE_BALANCE,
- 0, 0, 0, 0);
-
- v4l2_ctrl_activate(isc->do_wb_ctrl, false);
-
- v4l2_ctrl_handler_setup(hdl);
-
- return 0;
-}
-
-static int isc_async_bound(struct v4l2_async_notifier *notifier,
- struct v4l2_subdev *subdev,
- struct v4l2_async_subdev *asd)
-{
- struct isc_device *isc = container_of(notifier->v4l2_dev,
- struct isc_device, v4l2_dev);
- struct isc_subdev_entity *subdev_entity =
- container_of(notifier, struct isc_subdev_entity, notifier);
-
- if (video_is_registered(&isc->video_dev)) {
- v4l2_err(&isc->v4l2_dev, "only supports one sub-device.\n");
- return -EBUSY;
- }
-
- subdev_entity->sd = subdev;
-
- return 0;
-}
-
-static void isc_async_unbind(struct v4l2_async_notifier *notifier,
- struct v4l2_subdev *subdev,
- struct v4l2_async_subdev *asd)
-{
- struct isc_device *isc = container_of(notifier->v4l2_dev,
- struct isc_device, v4l2_dev);
- cancel_work_sync(&isc->awb_work);
- video_unregister_device(&isc->video_dev);
- v4l2_ctrl_handler_free(&isc->ctrls.handler);
-}
-
-static struct isc_format *find_format_by_code(unsigned int code, int *index)
-{
- struct isc_format *fmt = &formats_list[0];
- unsigned int i;
-
- for (i = 0; i < ARRAY_SIZE(formats_list); i++) {
- if (fmt->mbus_code == code) {
- *index = i;
- return fmt;
- }
-
- fmt++;
- }
-
- return NULL;
-}
-
-static int isc_formats_init(struct isc_device *isc)
-{
- struct isc_format *fmt;
- struct v4l2_subdev *subdev = isc->current_subdev->sd;
- unsigned int num_fmts, i, j;
- u32 list_size = ARRAY_SIZE(formats_list);
- struct v4l2_subdev_mbus_code_enum mbus_code = {
- .which = V4L2_SUBDEV_FORMAT_ACTIVE,
- };
-
- num_fmts = 0;
- while (!v4l2_subdev_call(subdev, pad, enum_mbus_code,
- NULL, &mbus_code)) {
- mbus_code.index++;
-
- fmt = find_format_by_code(mbus_code.code, &i);
- if (!fmt) {
- v4l2_warn(&isc->v4l2_dev, "Mbus code %x not supported\n",
- mbus_code.code);
- continue;
- }
-
- fmt->sd_support = true;
- num_fmts++;
- }
-
- if (!num_fmts)
- return -ENXIO;
-
- isc->num_user_formats = num_fmts;
- isc->user_formats = devm_kcalloc(isc->dev,
- num_fmts, sizeof(*isc->user_formats),
- GFP_KERNEL);
- if (!isc->user_formats)
- return -ENOMEM;
-
- fmt = &formats_list[0];
- for (i = 0, j = 0; i < list_size; i++) {
- if (fmt->sd_support)
- isc->user_formats[j++] = fmt;
- fmt++;
- }
-
- return 0;
-}
-
-static int isc_set_default_fmt(struct isc_device *isc)
-{
- struct v4l2_format f = {
- .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
- .fmt.pix = {
- .width = VGA_WIDTH,
- .height = VGA_HEIGHT,
- .field = V4L2_FIELD_NONE,
- .pixelformat = isc->user_formats[0]->fourcc,
- },
- };
- int ret;
-
- ret = isc_try_fmt(isc, &f, NULL);
- if (ret)
- return ret;
-
- isc->fmt = f;
- return 0;
-}
-
-static int isc_async_complete(struct v4l2_async_notifier *notifier)
-{
- struct isc_device *isc = container_of(notifier->v4l2_dev,
- struct isc_device, v4l2_dev);
- struct video_device *vdev = &isc->video_dev;
- struct vb2_queue *q = &isc->vb2_vidq;
- int ret;
-
- INIT_WORK(&isc->awb_work, isc_awb_work);
-
- ret = v4l2_device_register_subdev_nodes(&isc->v4l2_dev);
- if (ret < 0) {
- v4l2_err(&isc->v4l2_dev, "Failed to register subdev nodes\n");
- return ret;
- }
-
- isc->current_subdev = container_of(notifier,
- struct isc_subdev_entity, notifier);
- mutex_init(&isc->lock);
- init_completion(&isc->comp);
-
- /* Initialize videobuf2 queue */
- q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
- q->io_modes = VB2_MMAP | VB2_DMABUF | VB2_READ;
- q->drv_priv = isc;
- q->buf_struct_size = sizeof(struct isc_buffer);
- q->ops = &isc_vb2_ops;
- q->mem_ops = &vb2_dma_contig_memops;
- q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
- q->lock = &isc->lock;
- q->min_buffers_needed = 1;
- q->dev = isc->dev;
-
- ret = vb2_queue_init(q);
- if (ret < 0) {
- v4l2_err(&isc->v4l2_dev,
- "vb2_queue_init() failed: %d\n", ret);
- return ret;
- }
-
- /* Init video dma queues */
- INIT_LIST_HEAD(&isc->dma_queue);
- spin_lock_init(&isc->dma_queue_lock);
- spin_lock_init(&isc->awb_lock);
-
- ret = isc_formats_init(isc);
- if (ret < 0) {
- v4l2_err(&isc->v4l2_dev,
- "Init format failed: %d\n", ret);
- return ret;
- }
-
- ret = isc_set_default_fmt(isc);
- if (ret) {
- v4l2_err(&isc->v4l2_dev, "Could not set default format\n");
- return ret;
- }
-
- ret = isc_ctrl_init(isc);
- if (ret) {
- v4l2_err(&isc->v4l2_dev, "Init isc ctrols failed: %d\n", ret);
- return ret;
- }
-
- /* Register video device */
- strscpy(vdev->name, ATMEL_ISC_NAME, sizeof(vdev->name));
- vdev->release = video_device_release_empty;
- vdev->fops = &isc_fops;
- vdev->ioctl_ops = &isc_ioctl_ops;
- vdev->v4l2_dev = &isc->v4l2_dev;
- vdev->vfl_dir = VFL_DIR_RX;
- vdev->queue = q;
- vdev->lock = &isc->lock;
- vdev->ctrl_handler = &isc->ctrls.handler;
- vdev->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_CAPTURE;
- video_set_drvdata(vdev, isc);
-
- ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
- if (ret < 0) {
- v4l2_err(&isc->v4l2_dev,
- "video_register_device failed: %d\n", ret);
- return ret;
- }
-
- return 0;
-}
-
-static const struct v4l2_async_notifier_operations isc_async_ops = {
- .bound = isc_async_bound,
- .unbind = isc_async_unbind,
- .complete = isc_async_complete,
-};
-
-static void isc_subdev_cleanup(struct isc_device *isc)
-{
- struct isc_subdev_entity *subdev_entity;
-
- list_for_each_entry(subdev_entity, &isc->subdev_entities, list) {
- v4l2_async_notifier_unregister(&subdev_entity->notifier);
- v4l2_async_notifier_cleanup(&subdev_entity->notifier);
- }
-
- INIT_LIST_HEAD(&isc->subdev_entities);
-}
-
-static int isc_pipeline_init(struct isc_device *isc)
-{
- struct device *dev = isc->dev;
- struct regmap *regmap = isc->regmap;
- struct regmap_field *regs;
- unsigned int i;
-
- /* WB-->CFA-->CC-->GAM-->CSC-->CBC-->SUB422-->SUB420 */
- const struct reg_field regfields[ISC_PIPE_LINE_NODE_NUM] = {
- REG_FIELD(ISC_WB_CTRL, 0, 0),
- REG_FIELD(ISC_CFA_CTRL, 0, 0),
- REG_FIELD(ISC_CC_CTRL, 0, 0),
- REG_FIELD(ISC_GAM_CTRL, 0, 0),
- REG_FIELD(ISC_GAM_CTRL, 1, 1),
- REG_FIELD(ISC_GAM_CTRL, 2, 2),
- REG_FIELD(ISC_GAM_CTRL, 3, 3),
- REG_FIELD(ISC_CSC_CTRL, 0, 0),
- REG_FIELD(ISC_CBC_CTRL, 0, 0),
- REG_FIELD(ISC_SUB422_CTRL, 0, 0),
- REG_FIELD(ISC_SUB420_CTRL, 0, 0),
- };
-
- for (i = 0; i < ISC_PIPE_LINE_NODE_NUM; i++) {
- regs = devm_regmap_field_alloc(dev, regmap, regfields[i]);
- if (IS_ERR(regs))
- return PTR_ERR(regs);
-
- isc->pipeline[i] = regs;
- }
-
- return 0;
-}
-
-static int isc_parse_dt(struct device *dev, struct isc_device *isc)
-{
- struct device_node *np = dev->of_node;
- struct device_node *epn = NULL, *rem;
- struct isc_subdev_entity *subdev_entity;
- unsigned int flags;
- int ret;
-
- INIT_LIST_HEAD(&isc->subdev_entities);
-
- while (1) {
- struct v4l2_fwnode_endpoint v4l2_epn = { .bus_type = 0 };
-
- epn = of_graph_get_next_endpoint(np, epn);
- if (!epn)
- return 0;
-
- rem = of_graph_get_remote_port_parent(epn);
- if (!rem) {
- dev_notice(dev, "Remote device at %pOF not found\n",
- epn);
- continue;
- }
-
- ret = v4l2_fwnode_endpoint_parse(of_fwnode_handle(epn),
- &v4l2_epn);
- if (ret) {
- of_node_put(rem);
- ret = -EINVAL;
- dev_err(dev, "Could not parse the endpoint\n");
- break;
- }
-
- subdev_entity = devm_kzalloc(dev,
- sizeof(*subdev_entity), GFP_KERNEL);
- if (!subdev_entity) {
- of_node_put(rem);
- ret = -ENOMEM;
- break;
- }
-
- /* asd will be freed by the subsystem once it's added to the
- * notifier list
- */
- subdev_entity->asd = kzalloc(sizeof(*subdev_entity->asd),
- GFP_KERNEL);
- if (!subdev_entity->asd) {
- of_node_put(rem);
- ret = -ENOMEM;
- break;
- }
-
- flags = v4l2_epn.bus.parallel.flags;
-
- if (flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)
- subdev_entity->pfe_cfg0 = ISC_PFE_CFG0_HPOL_LOW;
-
- if (flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)
- subdev_entity->pfe_cfg0 |= ISC_PFE_CFG0_VPOL_LOW;
-
- if (flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)
- subdev_entity->pfe_cfg0 |= ISC_PFE_CFG0_PPOL_LOW;
-
- if (v4l2_epn.bus_type == V4L2_MBUS_BT656)
- subdev_entity->pfe_cfg0 |= ISC_PFE_CFG0_CCIR_CRC |
- ISC_PFE_CFG0_CCIR656;
-
- subdev_entity->asd->match_type = V4L2_ASYNC_MATCH_FWNODE;
- subdev_entity->asd->match.fwnode =
- of_fwnode_handle(rem);
- list_add_tail(&subdev_entity->list, &isc->subdev_entities);
- }
-
- of_node_put(epn);
- return ret;
-}
-
-/* regmap configuration */
-#define ATMEL_ISC_REG_MAX 0xbfc
-static const struct regmap_config isc_regmap_config = {
- .reg_bits = 32,
- .reg_stride = 4,
- .val_bits = 32,
- .max_register = ATMEL_ISC_REG_MAX,
-};
-
-static int atmel_isc_probe(struct platform_device *pdev)
-{
- struct device *dev = &pdev->dev;
- struct isc_device *isc;
- struct resource *res;
- void __iomem *io_base;
- struct isc_subdev_entity *subdev_entity;
- int irq;
- int ret;
-
- isc = devm_kzalloc(dev, sizeof(*isc), GFP_KERNEL);
- if (!isc)
- return -ENOMEM;
-
- platform_set_drvdata(pdev, isc);
- isc->dev = dev;
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- io_base = devm_ioremap_resource(dev, res);
- if (IS_ERR(io_base))
- return PTR_ERR(io_base);
-
- isc->regmap = devm_regmap_init_mmio(dev, io_base, &isc_regmap_config);
- if (IS_ERR(isc->regmap)) {
- ret = PTR_ERR(isc->regmap);
- dev_err(dev, "failed to init register map: %d\n", ret);
- return ret;
- }
-
- irq = platform_get_irq(pdev, 0);
- if (irq < 0) {
- ret = irq;
- dev_err(dev, "failed to get irq: %d\n", ret);
- return ret;
- }
-
- ret = devm_request_irq(dev, irq, isc_interrupt, 0,
- ATMEL_ISC_NAME, isc);
- if (ret < 0) {
- dev_err(dev, "can't register ISR for IRQ %u (ret=%i)\n",
- irq, ret);
- return ret;
- }
-
- ret = isc_pipeline_init(isc);
- if (ret)
- return ret;
-
- isc->hclock = devm_clk_get(dev, "hclock");
- if (IS_ERR(isc->hclock)) {
- ret = PTR_ERR(isc->hclock);
- dev_err(dev, "failed to get hclock: %d\n", ret);
- return ret;
- }
-
- ret = clk_prepare_enable(isc->hclock);
- if (ret) {
- dev_err(dev, "failed to enable hclock: %d\n", ret);
- return ret;
- }
-
- ret = isc_clk_init(isc);
- if (ret) {
- dev_err(dev, "failed to init isc clock: %d\n", ret);
- goto unprepare_hclk;
- }
-
- isc->ispck = isc->isc_clks[ISC_ISPCK].clk;
-
- ret = clk_prepare_enable(isc->ispck);
- if (ret) {
- dev_err(dev, "failed to enable ispck: %d\n", ret);
- goto unprepare_hclk;
- }
-
- /* ispck should be greater or equal to hclock */
- ret = clk_set_rate(isc->ispck, clk_get_rate(isc->hclock));
- if (ret) {
- dev_err(dev, "failed to set ispck rate: %d\n", ret);
- goto unprepare_clk;
- }
-
- ret = v4l2_device_register(dev, &isc->v4l2_dev);
- if (ret) {
- dev_err(dev, "unable to register v4l2 device.\n");
- goto unprepare_clk;
- }
-
- ret = isc_parse_dt(dev, isc);
- if (ret) {
- dev_err(dev, "fail to parse device tree\n");
- goto unregister_v4l2_device;
- }
-
- if (list_empty(&isc->subdev_entities)) {
- dev_err(dev, "no subdev found\n");
- ret = -ENODEV;
- goto unregister_v4l2_device;
- }
-
- list_for_each_entry(subdev_entity, &isc->subdev_entities, list) {
- v4l2_async_notifier_init(&subdev_entity->notifier);
-
- ret = v4l2_async_notifier_add_subdev(&subdev_entity->notifier,
- subdev_entity->asd);
- if (ret) {
- fwnode_handle_put(subdev_entity->asd->match.fwnode);
- kfree(subdev_entity->asd);
- goto cleanup_subdev;
- }
-
- subdev_entity->notifier.ops = &isc_async_ops;
-
- ret = v4l2_async_notifier_register(&isc->v4l2_dev,
- &subdev_entity->notifier);
- if (ret) {
- dev_err(dev, "fail to register async notifier\n");
- goto cleanup_subdev;
- }
-
- if (video_is_registered(&isc->video_dev))
- break;
- }
-
- pm_runtime_set_active(dev);
- pm_runtime_enable(dev);
- pm_request_idle(dev);
-
- return 0;
-
-cleanup_subdev:
- isc_subdev_cleanup(isc);
-
-unregister_v4l2_device:
- v4l2_device_unregister(&isc->v4l2_dev);
-
-unprepare_clk:
- clk_disable_unprepare(isc->ispck);
-unprepare_hclk:
- clk_disable_unprepare(isc->hclock);
-
- isc_clk_cleanup(isc);
-
- return ret;
-}
-
-static int atmel_isc_remove(struct platform_device *pdev)
-{
- struct isc_device *isc = platform_get_drvdata(pdev);
-
- pm_runtime_disable(&pdev->dev);
- clk_disable_unprepare(isc->ispck);
- clk_disable_unprepare(isc->hclock);
-
- isc_subdev_cleanup(isc);
-
- v4l2_device_unregister(&isc->v4l2_dev);
-
- isc_clk_cleanup(isc);
-
- return 0;
-}
-
-static int __maybe_unused isc_runtime_suspend(struct device *dev)
-{
- struct isc_device *isc = dev_get_drvdata(dev);
-
- clk_disable_unprepare(isc->ispck);
- clk_disable_unprepare(isc->hclock);
-
- return 0;
-}
-
-static int __maybe_unused isc_runtime_resume(struct device *dev)
-{
- struct isc_device *isc = dev_get_drvdata(dev);
- int ret;
-
- ret = clk_prepare_enable(isc->hclock);
- if (ret)
- return ret;
-
- return clk_prepare_enable(isc->ispck);
-}
-
-static const struct dev_pm_ops atmel_isc_dev_pm_ops = {
- SET_RUNTIME_PM_OPS(isc_runtime_suspend, isc_runtime_resume, NULL)
-};
-
-static const struct of_device_id atmel_isc_of_match[] = {
- { .compatible = "atmel,sama5d2-isc" },
- { }
-};
-MODULE_DEVICE_TABLE(of, atmel_isc_of_match);
-
-static struct platform_driver atmel_isc_driver = {
- .probe = atmel_isc_probe,
- .remove = atmel_isc_remove,
- .driver = {
- .name = ATMEL_ISC_NAME,
- .pm = &atmel_isc_dev_pm_ops,
- .of_match_table = of_match_ptr(atmel_isc_of_match),
- },
-};
-
-module_platform_driver(atmel_isc_driver);
-
-MODULE_AUTHOR("Songjun Wu <songjun.wu@xxxxxxxxxxxxx>");
-MODULE_DESCRIPTION("The V4L2 driver for Atmel-ISC");
-MODULE_LICENSE("GPL v2");
-MODULE_SUPPORTED_DEVICE("video");
diff --git a/drivers/media/platform/atmel/atmel-isc.h b/drivers/media/platform/atmel/atmel-isc.h
new file mode 100644
index 0000000..0bd5dff
--- /dev/null
+++ b/drivers/media/platform/atmel/atmel-isc.h
@@ -0,0 +1,208 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Microchip Image Sensor Controller (ISC) driver header file
+ *
+ * Copyright (C) 2016-2019 Microchip Technology, Inc.
+ *
+ * Author: Songjun Wu <songjun.wu@xxxxxxxxxxxxx>
+ * Author: Eugen Hristev <eugen.hristev@xxxxxxxxxxxxx>
+ *
+ */
+#ifndef _ATMEL_ISC_H_
+
+#define ISC_MAX_SUPPORT_WIDTH 2592
+#define ISC_MAX_SUPPORT_HEIGHT 1944
+
+#define ISC_CLK_MAX_DIV 255
+
+enum isc_clk_id {
+ ISC_ISPCK = 0,
+ ISC_MCK = 1,
+};
+
+struct isc_clk {
+ struct clk_hw hw;
+ struct clk *clk;
+ struct regmap *regmap;
+ spinlock_t lock;
+ u8 id;
+ u8 parent_id;
+ u32 div;
+ struct device *dev;
+};
+
+#define to_isc_clk(hw) container_of(hw, struct isc_clk, hw)
+
+struct isc_buffer {
+ struct vb2_v4l2_buffer vb;
+ struct list_head list;
+};
+
+struct isc_subdev_entity {
+ struct v4l2_subdev *sd;
+ struct v4l2_async_subdev *asd;
+ struct v4l2_async_notifier notifier;
+
+ u32 pfe_cfg0;
+
+ struct list_head list;
+};
+
+/*
+ * struct isc_format - ISC media bus format information
+ This structure represents the interface between the ISC
+ and the sensor. It's the input format received by
+ the ISC.
+ * @fourcc: Fourcc code for this format
+ * @mbus_code: V4L2 media bus format code.
+ * @cfa_baycfg: If this format is RAW BAYER, indicate the type of bayer.
+ this is either BGBG, RGRG, etc.
+ * @pfe_cfg0_bps: Number of hardware data lines connected to the ISC
+ */
+
+struct isc_format {
+ u32 fourcc;
+ u32 mbus_code;
+ u32 cfa_baycfg;
+
+ bool sd_support;
+ u32 pfe_cfg0_bps;
+};
+
+/* Pipeline bitmap */
+#define WB_ENABLE BIT(0)
+#define CFA_ENABLE BIT(1)
+#define CC_ENABLE BIT(2)
+#define GAM_ENABLE BIT(3)
+#define GAM_BENABLE BIT(4)
+#define GAM_GENABLE BIT(5)
+#define GAM_RENABLE BIT(6)
+#define CSC_ENABLE BIT(7)
+#define CBC_ENABLE BIT(8)
+#define SUB422_ENABLE BIT(9)
+#define SUB420_ENABLE BIT(10)
+
+#define GAM_ENABLES (GAM_RENABLE | GAM_GENABLE | GAM_BENABLE | GAM_ENABLE)
+
+/*
+ * struct fmt_config - ISC format configuration and internal pipeline
+ This structure represents the internal configuration
+ of the ISC.
+ It also holds the format that ISC will present to v4l2.
+ * @sd_format: Pointer to an isc_format struct that holds the sensor
+ configuration.
+ * @fourcc: Fourcc code for this format.
+ * @bpp: Bytes per pixel in the current format.
+ * @rlp_cfg_mode: Configuration of the RLP (rounding, limiting packaging)
+ * @dcfg_imode: Configuration of the input of the DMA module
+ * @dctrl_dview: Configuration of the output of the DMA module
+ * @bits_pipeline: Configuration of the pipeline, which modules are enabled
+ */
+struct fmt_config {
+ struct isc_format *sd_format;
+
+ u32 fourcc;
+ u8 bpp;
+
+ u32 rlp_cfg_mode;
+ u32 dcfg_imode;
+ u32 dctrl_dview;
+
+ u32 bits_pipeline;
+};
+
+#define HIST_ENTRIES 512
+#define HIST_BAYER (ISC_HIS_CFG_MODE_B + 1)
+
+enum{
+ HIST_INIT = 0,
+ HIST_ENABLED,
+ HIST_DISABLED,
+};
+
+struct isc_ctrls {
+ struct v4l2_ctrl_handler handler;
+
+ u32 brightness;
+ u32 contrast;
+ u8 gamma_index;
+#define ISC_WB_NONE 0
+#define ISC_WB_AUTO 1
+#define ISC_WB_ONETIME 2
+ u8 awb;
+
+ /* one for each component : GR, R, GB, B */
+ u32 gain[HIST_BAYER];
+ u32 offset[HIST_BAYER];
+
+ u32 hist_entry[HIST_ENTRIES];
+ u32 hist_count[HIST_BAYER];
+ u8 hist_id;
+ u8 hist_stat;
+#define HIST_MIN_INDEX 0
+#define HIST_MAX_INDEX 1
+ u32 hist_minmax[HIST_BAYER][2];
+};
+
+#define ISC_PIPE_LINE_NODE_NUM 11
+
+struct isc_device {
+ struct regmap *regmap;
+ struct clk *hclock;
+ struct clk *ispck;
+ struct isc_clk isc_clks[2];
+
+ struct device *dev;
+ struct v4l2_device v4l2_dev;
+ struct video_device video_dev;
+
+ struct vb2_queue vb2_vidq;
+ spinlock_t dma_queue_lock;
+ struct list_head dma_queue;
+ struct isc_buffer *cur_frm;
+ unsigned int sequence;
+ bool stop;
+ struct completion comp;
+
+ struct v4l2_format fmt;
+ struct isc_format **user_formats;
+ unsigned int num_user_formats;
+
+ struct fmt_config config;
+ struct fmt_config try_config;
+
+ struct isc_ctrls ctrls;
+ struct v4l2_ctrl *do_wb_ctrl;
+ struct work_struct awb_work;
+
+ struct mutex lock;
+ spinlock_t awb_lock;
+
+ struct regmap_field *pipeline[ISC_PIPE_LINE_NODE_NUM];
+
+ struct isc_subdev_entity *current_subdev;
+ struct list_head subdev_entities;
+};
+
+#define GAMMA_MAX 2
+#define GAMMA_ENTRIES 64
+
+#define ATMEL_ISC_NAME "atmel-isc"
+
+/* module parameters */
+extern unsigned int debug;
+extern unsigned int sensor_preferred;
+
+extern struct isc_format formats_list[];
+extern struct isc_format controller_formats[];
+extern const u32 isc_gamma_table[GAMMA_MAX + 1][GAMMA_ENTRIES];
+extern const struct regmap_config isc_regmap_config;
+extern const struct v4l2_async_notifier_operations isc_async_ops;
+
+irqreturn_t isc_interrupt(int irq, void *dev_id);
+int isc_pipeline_init(struct isc_device *isc);
+int isc_clk_init(struct isc_device *isc);
+void isc_subdev_cleanup(struct isc_device *isc);
+void isc_clk_cleanup(struct isc_device *isc);
+
+#endif
diff --git a/drivers/media/platform/atmel/atmel-sama5d2-isc.c b/drivers/media/platform/atmel/atmel-sama5d2-isc.c
new file mode 100644
index 0000000..69faaaf
--- /dev/null
+++ b/drivers/media/platform/atmel/atmel-sama5d2-isc.c
@@ -0,0 +1,344 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Microchip Image Sensor Controller (ISC) driver
+ *
+ * Copyright (C) 2016-2019 Microchip Technology, Inc.
+ *
+ * Author: Songjun Wu <songjun.wu@xxxxxxxxxxxxx>
+ * Author: Eugen Hristev <eugen.hristev@xxxxxxxxxxxxx>
+ *
+ *
+ * Sensor-->PFE-->WB-->CFA-->CC-->GAM-->CSC-->CBC-->SUB-->RLP-->DMA
+ *
+ * ISC video pipeline integrates the following submodules:
+ * PFE: Parallel Front End to sample the camera sensor input stream
+ * WB: Programmable white balance in the Bayer domain
+ * CFA: Color filter array interpolation module
+ * CC: Programmable color correction
+ * GAM: Gamma correction
+ * CSC: Programmable color space conversion
+ * CBC: Contrast and Brightness control
+ * SUB: This module performs YCbCr444 to YCbCr420 chrominance subsampling
+ * RLP: This module performs rounding, range limiting
+ * and packing of the incoming data
+ */
+
+#include <linux/clk.h>
+#include <linux/clkdev.h>
+#include <linux/clk-provider.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/math64.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_graph.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/videodev2.h>
+
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-event.h>
+#include <media/v4l2-image-sizes.h>
+#include <media/v4l2-ioctl.h>
+#include <media/v4l2-fwnode.h>
+#include <media/v4l2-subdev.h>
+#include <media/videobuf2-dma-contig.h>
+
+#include "atmel-isc-regs.h"
+#include "atmel-isc.h"
+
+#define ISC_MAX_SUPPORT_WIDTH 2592
+#define ISC_MAX_SUPPORT_HEIGHT 1944
+
+#define ISC_CLK_MAX_DIV 255
+
+static int isc_parse_dt(struct device *dev, struct isc_device *isc)
+{
+ struct device_node *np = dev->of_node;
+ struct device_node *epn = NULL, *rem;
+ struct isc_subdev_entity *subdev_entity;
+ unsigned int flags;
+ int ret;
+
+ INIT_LIST_HEAD(&isc->subdev_entities);
+
+ while (1) {
+ struct v4l2_fwnode_endpoint v4l2_epn = { .bus_type = 0 };
+
+ epn = of_graph_get_next_endpoint(np, epn);
+ if (!epn)
+ return 0;
+
+ rem = of_graph_get_remote_port_parent(epn);
+ if (!rem) {
+ dev_notice(dev, "Remote device at %pOF not found\n",
+ epn);
+ continue;
+ }
+
+ ret = v4l2_fwnode_endpoint_parse(of_fwnode_handle(epn),
+ &v4l2_epn);
+ if (ret) {
+ of_node_put(rem);
+ ret = -EINVAL;
+ dev_err(dev, "Could not parse the endpoint\n");
+ break;
+ }
+
+ subdev_entity = devm_kzalloc(dev,
+ sizeof(*subdev_entity), GFP_KERNEL);
+ if (!subdev_entity) {
+ of_node_put(rem);
+ ret = -ENOMEM;
+ break;
+ }
+
+ /* asd will be freed by the subsystem once it's added to the
+ * notifier list
+ */
+ subdev_entity->asd = kzalloc(sizeof(*subdev_entity->asd),
+ GFP_KERNEL);
+ if (!subdev_entity->asd) {
+ of_node_put(rem);
+ ret = -ENOMEM;
+ break;
+ }
+
+ flags = v4l2_epn.bus.parallel.flags;
+
+ if (flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)
+ subdev_entity->pfe_cfg0 = ISC_PFE_CFG0_HPOL_LOW;
+
+ if (flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)
+ subdev_entity->pfe_cfg0 |= ISC_PFE_CFG0_VPOL_LOW;
+
+ if (flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)
+ subdev_entity->pfe_cfg0 |= ISC_PFE_CFG0_PPOL_LOW;
+
+ if (v4l2_epn.bus_type == V4L2_MBUS_BT656)
+ subdev_entity->pfe_cfg0 |= ISC_PFE_CFG0_CCIR_CRC |
+ ISC_PFE_CFG0_CCIR656;
+
+ subdev_entity->asd->match_type = V4L2_ASYNC_MATCH_FWNODE;
+ subdev_entity->asd->match.fwnode =
+ of_fwnode_handle(rem);
+ list_add_tail(&subdev_entity->list, &isc->subdev_entities);
+ }
+
+ of_node_put(epn);
+ return ret;
+}
+
+static int atmel_isc_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct isc_device *isc;
+ struct resource *res;
+ void __iomem *io_base;
+ struct isc_subdev_entity *subdev_entity;
+ int irq;
+ int ret;
+
+ isc = devm_kzalloc(dev, sizeof(*isc), GFP_KERNEL);
+ if (!isc)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, isc);
+ isc->dev = dev;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ io_base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(io_base))
+ return PTR_ERR(io_base);
+
+ isc->regmap = devm_regmap_init_mmio(dev, io_base, &isc_regmap_config);
+ if (IS_ERR(isc->regmap)) {
+ ret = PTR_ERR(isc->regmap);
+ dev_err(dev, "failed to init register map: %d\n", ret);
+ return ret;
+ }
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
+ ret = irq;
+ dev_err(dev, "failed to get irq: %d\n", ret);
+ return ret;
+ }
+
+ ret = devm_request_irq(dev, irq, isc_interrupt, 0,
+ ATMEL_ISC_NAME, isc);
+ if (ret < 0) {
+ dev_err(dev, "can't register ISR for IRQ %u (ret=%i)\n",
+ irq, ret);
+ return ret;
+ }
+
+ ret = isc_pipeline_init(isc);
+ if (ret)
+ return ret;
+
+ isc->hclock = devm_clk_get(dev, "hclock");
+ if (IS_ERR(isc->hclock)) {
+ ret = PTR_ERR(isc->hclock);
+ dev_err(dev, "failed to get hclock: %d\n", ret);
+ return ret;
+ }
+
+ ret = clk_prepare_enable(isc->hclock);
+ if (ret) {
+ dev_err(dev, "failed to enable hclock: %d\n", ret);
+ return ret;
+ }
+
+ ret = isc_clk_init(isc);
+ if (ret) {
+ dev_err(dev, "failed to init isc clock: %d\n", ret);
+ goto unprepare_hclk;
+ }
+
+ isc->ispck = isc->isc_clks[ISC_ISPCK].clk;
+
+ ret = clk_prepare_enable(isc->ispck);
+ if (ret) {
+ dev_err(dev, "failed to enable ispck: %d\n", ret);
+ goto unprepare_hclk;
+ }
+
+ /* ispck should be greater or equal to hclock */
+ ret = clk_set_rate(isc->ispck, clk_get_rate(isc->hclock));
+ if (ret) {
+ dev_err(dev, "failed to set ispck rate: %d\n", ret);
+ goto unprepare_clk;
+ }
+
+ ret = v4l2_device_register(dev, &isc->v4l2_dev);
+ if (ret) {
+ dev_err(dev, "unable to register v4l2 device.\n");
+ goto unprepare_clk;
+ }
+
+ ret = isc_parse_dt(dev, isc);
+ if (ret) {
+ dev_err(dev, "fail to parse device tree\n");
+ goto unregister_v4l2_device;
+ }
+
+ if (list_empty(&isc->subdev_entities)) {
+ dev_err(dev, "no subdev found\n");
+ ret = -ENODEV;
+ goto unregister_v4l2_device;
+ }
+
+ list_for_each_entry(subdev_entity, &isc->subdev_entities, list) {
+ v4l2_async_notifier_init(&subdev_entity->notifier);
+
+ ret = v4l2_async_notifier_add_subdev(&subdev_entity->notifier,
+ subdev_entity->asd);
+ if (ret) {
+ fwnode_handle_put(subdev_entity->asd->match.fwnode);
+ kfree(subdev_entity->asd);
+ goto cleanup_subdev;
+ }
+
+ subdev_entity->notifier.ops = &isc_async_ops;
+
+ ret = v4l2_async_notifier_register(&isc->v4l2_dev,
+ &subdev_entity->notifier);
+ if (ret) {
+ dev_err(dev, "fail to register async notifier\n");
+ goto cleanup_subdev;
+ }
+
+ if (video_is_registered(&isc->video_dev))
+ break;
+ }
+
+ pm_runtime_set_active(dev);
+ pm_runtime_enable(dev);
+ pm_request_idle(dev);
+
+ return 0;
+
+cleanup_subdev:
+ isc_subdev_cleanup(isc);
+
+unregister_v4l2_device:
+ v4l2_device_unregister(&isc->v4l2_dev);
+
+unprepare_clk:
+ clk_disable_unprepare(isc->ispck);
+unprepare_hclk:
+ clk_disable_unprepare(isc->hclock);
+
+ isc_clk_cleanup(isc);
+
+ return ret;
+}
+
+static int atmel_isc_remove(struct platform_device *pdev)
+{
+ struct isc_device *isc = platform_get_drvdata(pdev);
+
+ pm_runtime_disable(&pdev->dev);
+ clk_disable_unprepare(isc->ispck);
+ clk_disable_unprepare(isc->hclock);
+
+ isc_subdev_cleanup(isc);
+
+ v4l2_device_unregister(&isc->v4l2_dev);
+
+ isc_clk_cleanup(isc);
+
+ return 0;
+}
+
+static int __maybe_unused isc_runtime_suspend(struct device *dev)
+{
+ struct isc_device *isc = dev_get_drvdata(dev);
+
+ clk_disable_unprepare(isc->ispck);
+ clk_disable_unprepare(isc->hclock);
+
+ return 0;
+}
+
+static int __maybe_unused isc_runtime_resume(struct device *dev)
+{
+ struct isc_device *isc = dev_get_drvdata(dev);
+ int ret;
+
+ ret = clk_prepare_enable(isc->hclock);
+ if (ret)
+ return ret;
+
+ return clk_prepare_enable(isc->ispck);
+}
+
+static const struct dev_pm_ops atmel_isc_dev_pm_ops = {
+ SET_RUNTIME_PM_OPS(isc_runtime_suspend, isc_runtime_resume, NULL)
+};
+
+static const struct of_device_id atmel_isc_of_match[] = {
+ { .compatible = "atmel,sama5d2-isc" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, atmel_isc_of_match);
+
+static struct platform_driver atmel_isc_driver = {
+ .probe = atmel_isc_probe,
+ .remove = atmel_isc_remove,
+ .driver = {
+ .name = ATMEL_ISC_NAME,
+ .pm = &atmel_isc_dev_pm_ops,
+ .of_match_table = of_match_ptr(atmel_isc_of_match),
+ },
+};
+
+module_platform_driver(atmel_isc_driver);
+
+MODULE_AUTHOR("Songjun Wu <songjun.wu@xxxxxxxxxxxxx>");
+MODULE_DESCRIPTION("The V4L2 driver for Atmel-ISC");
+MODULE_LICENSE("GPL v2");
+MODULE_SUPPORTED_DEVICE("video");
--
2.7.4
