Add the subdev driver for the MIPI CSIS units available in
S5P and Exynos4 SoC series. This driver supports both CSIS0
and CSIS1 MIPI-CSI2 receivers. The driver requires Runtime PM
to be enabled for proper operation.
Signed-off-by: Sylwester Nawrocki <s.nawrocki@xxxxxxxxxxx>
Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
---
Hello,
this is a third version of the subdev driver for MIPI-CSI2 receivers
available in S5PVx10 and EXYNOS4 SoCs. The MIPI CSIS module is
a MIPI-CSI bus frontend of the FIMC IP.
Changes since v1:
- added runtime PM support
- conversion to the pad ops
Changes since v2:
- added reference counting in s_stream op to allow the mipi-csi subdev
to be shared by multiple FIMC instances
- added support for TRY format in pad get_fmt op
- added pm_runtime* calls in s_stream op to avoid a need for explicit
s_power(1) call
- corrected locking around the pad ops, minor bug fixes
Comments are welcome!
Regards,
Sylwester Nawrocki
Samsung Poland R&D Center
---
drivers/media/video/Kconfig | 6 +
drivers/media/video/s5p-fimc/Makefile | 2 +
drivers/media/video/s5p-fimc/mipi-csis.c | 756 ++++++++++++++++++++++++++++++
drivers/media/video/s5p-fimc/mipi-csis.h | 19 +
4 files changed, 783 insertions(+), 0 deletions(-)
create mode 100644 drivers/media/video/s5p-fimc/mipi-csis.c
create mode 100644 drivers/media/video/s5p-fimc/mipi-csis.h
diff --git a/drivers/media/video/Kconfig b/drivers/media/video/Kconfig
index 55caa73..fd0bd68 100644
--- a/drivers/media/video/Kconfig
+++ b/drivers/media/video/Kconfig
@@ -955,6 +955,12 @@ config VIDEO_SAMSUNG_S5P_FIMC
This is a v4l2 driver for the S5P and EXYNOS4 camera host interface
and video postprocessor.
+config VIDEO_S5P_MIPI_CSIS
+ tristate "S5P and EXYNOS4 MIPI CSI Receiver driver"
+ depends on VIDEO_V4L2 && VIDEO_SAMSUNG_S5P_FIMC && MEDIA_CONTROLLER
+ ---help---
+ This is a v4l2 driver for the S5P/EXYNOS4 MIPI-CSI Receiver.
+
#
# USB Multimedia device configuration
#
diff --git a/drivers/media/video/s5p-fimc/Makefile b/drivers/media/video/s5p-fimc/Makefile
index 7ea1b14..72207de 100644
--- a/drivers/media/video/s5p-fimc/Makefile
+++ b/drivers/media/video/s5p-fimc/Makefile
@@ -1,3 +1,5 @@
obj-$(CONFIG_VIDEO_SAMSUNG_S5P_FIMC) := s5p-fimc.o
s5p-fimc-y := fimc-core.o fimc-reg.o fimc-capture.o
+
+obj-$(CONFIG_VIDEO_S5P_MIPI_CSIS) += mipi-csis.o
diff --git a/drivers/media/video/s5p-fimc/mipi-csis.c b/drivers/media/video/s5p-fimc/mipi-csis.c
new file mode 100644
index 0000000..10e083e
--- /dev/null
+++ b/drivers/media/video/s5p-fimc/mipi-csis.c
@@ -0,0 +1,756 @@
+/*
+ * Samsung S5P SoC series MIPI-CSI receiver driver
+ *
+ * Copyright (C) 2011 Samsung Electronics Co., Ltd.
+ * Contact: Sylwester Nawrocki, <s.nawrocki@xxxxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/errno.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/kernel.h>
+#include <linux/memory.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/videodev2.h>
+#include <media/v4l2-subdev.h>
+#include <plat/mipi_csis.h>
+#include "mipi-csis.h"
+
+static int debug;
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "Debug level (0-1)");
+
+/* Register map definition */
+
+/* CSIS global control */
+#define S5P_CSIS_CTRL 0x00
+#define S5P_CSIS_CTRL_DPDN_DEFAULT (0 << 31)
+#define S5P_CSIS_CTRL_DPDN_SWAP (1 << 31)
+#define S5P_CSIS_CTRL_ALIGN_32BIT (1 << 20)
+#define S5P_CSIS_CTRL_UPDATE_SHADOW (1 << 16)
+#define S5P_CSIS_CTRL_WCLK_EXTCLK (1 << 8)
+#define S5P_CSIS_CTRL_RESET (1 << 4)
+#define S5P_CSIS_CTRL_ENABLE (1 << 0)
+
+/* D-PHY control */
+#define S5P_CSIS_DPHYCTRL 0x04
+#define S5P_CSIS_DPHYCTRL_HSS_MASK (0x1f << 27)
+#define S5P_CSIS_DPHYCTRL_ENABLE (0x1f << 0)
+
+#define S5P_CSIS_CONFIG 0x08
+#define S5P_CSIS_CFG_FMT_YCBCR422_8BIT (0x1e << 2)
+#define S5P_CSIS_CFG_FMT_RAW8 (0x2a << 2)
+#define S5P_CSIS_CFG_FMT_RAW10 (0x2b << 2)
+#define S5P_CSIS_CFG_FMT_RAW12 (0x2c << 2)
+/* User defined formats, x = 1...4 */
+#define S5P_CSIS_CFG_FMT_USER(x) ((0x30 + x - 1) << 2)
+#define S5P_CSIS_CFG_FMT_MASK (0x3f << 2)
+#define S5P_CSIS_CFG_NR_LANE_MASK 3
+
+/* Interrupt mask. */
+#define S5P_CSIS_INTMSK 0x10
+#define S5P_CSIS_INTMSK_EN_ALL 0xf000003f
+#define S5P_CSIS_INTSRC 0x14
+
+/* Pixel resolution */
+#define S5P_CSIS_RESOL 0x2c
+#define CSIS_MAX_PIX_WIDTH 0xffff
+#define CSIS_MAX_PIX_HEIGHT 0xffff
+
+enum {
+ CSIS_CLK_MUX,
+ CSIS_CLK_GATE,
+};
+
+static char *csi_clock_name[] = {
+ [CSIS_CLK_MUX] = "sclk_csis",
+ [CSIS_CLK_GATE] = "csis",
+};
+#define NUM_CSIS_CLOCKS ARRAY_SIZE(csi_clock_name)
+
+enum {
+ ST_POWERED = 1,
+ ST_STREAMING = 2,
+ ST_SUSPENDED = 4,
+};
+
+enum {
+ CSIS_FMT_TRY,
+ CSIS_FMT_ACTIVE,
+ CSIS_NUM_FMTS
+};
+
+struct csis_state {
+ struct mutex lock;
+ struct media_pad pads[CSIS_PADS_NUM];
+ struct v4l2_subdev sd;
+ struct platform_device *pdev;
+ struct resource *regs_res;
+ void __iomem *regs;
+ struct clk *clock[NUM_CSIS_CLOCKS];
+ int irq;
+ struct regulator *supply;
+ u32 flags;
+ int use_count;
+ /* Common format for the source and sink pad. */
+ const struct csis_pix_format *csis_fmt;
+ struct v4l2_mbus_framefmt mf[CSIS_NUM_FMTS];
+};
+
+struct csis_pix_format {
+ enum v4l2_mbus_pixelcode code;
+ u32 fmt_reg;
+ u16 pix_hor_align;
+};
+
+static const struct csis_pix_format s5p_csis_formats[] = {
+ {
+ .code = V4L2_MBUS_FMT_VYUY8_2X8,
+ .fmt_reg = S5P_CSIS_CFG_FMT_YCBCR422_8BIT,
+ .pix_hor_align = 1,
+ },
+ {
+ .code = V4L2_MBUS_FMT_JPEG_1X8,
+ .fmt_reg = S5P_CSIS_CFG_FMT_USER(1),
+ .pix_hor_align = 1,
+ },
+};
+
+#define IS_CSIS_PAD_VALID(pad) (pad == CSIS_PAD_SOURCE || pad == CSIS_PAD_SINK)
+
+static struct csis_state *sd_to_csis_state(struct v4l2_subdev *sdev)
+{
+ return container_of(sdev, struct csis_state, sd);
+}
+
+static const struct csis_pix_format *
+find_csis_format(struct v4l2_mbus_framefmt *mf)
+{
+ int i = ARRAY_SIZE(s5p_csis_formats);
+
+ while (--i > 0) {
+ if (mf->code == s5p_csis_formats[i].code)
+ return &s5p_csis_formats[i];
+ }
+
+ return NULL;
+}
+
+static void s5p_csis_enable_interrupts(struct csis_state *state, bool on)
+{
+ u32 reg = readl(state->regs + S5P_CSIS_CTRL);
+
+ if (on)
+ reg |= S5P_CSIS_INTMSK_EN_ALL;
+ else
+ reg &= ~S5P_CSIS_INTMSK_EN_ALL;
+ writel(reg, state->regs + S5P_CSIS_INTMSK);
+}
+
+static void s5p_csis_reset(struct csis_state *state)
+{
+ u32 reg = readl(state->regs + S5P_CSIS_CTRL);
+
+ writel(reg | S5P_CSIS_CTRL_RESET, state->regs + S5P_CSIS_CTRL);
+ udelay(10);
+}
+
+static void s5p_csis_system_enable(struct csis_state *state, int on)
+{
+ u32 reg;
+
+ reg = readl(state->regs + S5P_CSIS_CTRL);
+ if (on)
+ reg |= S5P_CSIS_CTRL_ENABLE;
+ else
+ reg &= ~S5P_CSIS_CTRL_ENABLE;
+ writel(reg, state->regs + S5P_CSIS_CTRL);
+
+ reg = readl(state->regs + S5P_CSIS_DPHYCTRL);
+ if (on)
+ reg |= S5P_CSIS_DPHYCTRL_ENABLE;
+ else
+ reg &= ~S5P_CSIS_DPHYCTRL_ENABLE;
+ writel(reg, state->regs + S5P_CSIS_DPHYCTRL);
+}
+
+static int __s5p_csis_set_format(struct csis_state *state)
+{
+ struct v4l2_mbus_framefmt *mf = &state->mf[CSIS_FMT_ACTIVE];
+ u32 reg;
+
+ v4l2_dbg(1, debug, &state->sd, "fmt: %d, %d x %d\n",
+ mf->code, mf->width, mf->height);
+
+ if (WARN_ON(state->csis_fmt == NULL))
+ return -EINVAL;
+
+ /* Color format */
+ reg = readl(state->regs + S5P_CSIS_CONFIG);
+ reg = (reg & ~S5P_CSIS_CFG_FMT_MASK) | state->csis_fmt->fmt_reg;
+ writel(reg, state->regs + S5P_CSIS_CONFIG);
+
+ /* Pixel resolution */
+ reg = (mf->width << 16) | mf->height;
+ writel(reg, state->regs + S5P_CSIS_RESOL);
+
+ return 0;
+}
+
+static void s5p_csis_set_hsync_settle(struct csis_state *state,
+ int settle)
+{
+ u32 reg = readl(state->regs + S5P_CSIS_DPHYCTRL);
+
+ reg &= ~S5P_CSIS_DPHYCTRL_HSS_MASK;
+ reg |= (settle << 27);
+ writel(reg, state->regs + S5P_CSIS_DPHYCTRL);
+}
+
+static int s5p_csis_set_params(struct csis_state *state)
+{
+ struct s5p_platform_mipi_csis *pdata = state->pdev->dev.platform_data;
+ u32 reg, tmp;
+ int ret;
+
+ reg = readl(state->regs + S5P_CSIS_CONFIG);
+ reg &= ~S5P_CSIS_CFG_NR_LANE_MASK;
+ tmp = (pdata->lanes - 1) & 0x3;
+ writel(reg | tmp, state->regs + S5P_CSIS_CONFIG);
+
+ ret = __s5p_csis_set_format(state);
+ if (ret)
+ return ret;
+
+ s5p_csis_set_hsync_settle(state, pdata->hs_settle);
+
+ reg = readl(state->regs + S5P_CSIS_CTRL);
+
+ if (pdata->alignment == 32)
+ reg |= S5P_CSIS_CTRL_ALIGN_32BIT;
+ else /* 24-bits */
+ reg &= ~S5P_CSIS_CTRL_ALIGN_32BIT;
+
+ /* Not using external clock. */
+ reg &= ~S5P_CSIS_CTRL_WCLK_EXTCLK;
+
+ writel(reg, state->regs + S5P_CSIS_CTRL);
+
+ /* Update the shadow register. */
+ reg = readl(state->regs + S5P_CSIS_CTRL);
+ writel(reg | S5P_CSIS_CTRL_UPDATE_SHADOW,
+ state->regs + S5P_CSIS_CTRL);
+
+ return 0;
+}
+
+static void s5p_csis_clk_put(struct csis_state *state)
+{
+ int i;
+
+ for (i = 0; i < NUM_CSIS_CLOCKS; i++) {
+ if (!IS_ERR(state->clock[i]))
+ clk_put(state->clock[i]);
+ }
+}
+
+static int s5p_csis_clk_get(struct csis_state *state)
+{
+ struct device *dev = &state->pdev->dev;
+ int i;
+
+ for (i = 0; i < NUM_CSIS_CLOCKS; i++) {
+ state->clock[i] = clk_get(dev, csi_clock_name[i]);
+
+ if (IS_ERR(state->clock[i])) {
+ s5p_csis_clk_put(state);
+ dev_err(dev, "failed to get clock: %s\n",
+ csi_clock_name[i]);
+ return -ENXIO;
+ }
+ }
+ return 0;
+}
+
+/* Called with the state.lock held. */
+static int __csis_set_power(struct csis_state *state, bool on)
+{
+ struct s5p_platform_mipi_csis *pdata = state->pdev->dev.platform_data;
+ int ret = 0;
+
+ if (on) {
+ if (state->supply)
+ ret = regulator_enable(state->supply);
+ if (!ret)
+ ret = pdata->phy_enable(state->pdev, true);
+ if (!ret)
+ state->flags |= ST_POWERED;
+ return ret;
+ }
+
+ ret = pdata->phy_enable(state->pdev, false);
+ if (!ret && state->supply)
+ ret = regulator_disable(state->supply);
+ if (!ret)
+ state->flags &= ~ST_POWERED;
+
+ return ret;
+}
+
+static int s5p_csis_s_power(struct v4l2_subdev *sd, int on)
+{
+ struct csis_state *state = sd_to_csis_state(sd);
+ struct device *dev = &state->pdev->dev;
+
+ v4l2_dbg(1, debug, sd, "%s: on: %d, flags: 0x%x\n",
+ __func__, on, state->flags);
+
+ if (on)
+ return pm_runtime_get_sync(dev);
+
+ return pm_runtime_put_sync(dev);
+}
+
+static int s5p_csis_start_stream(struct csis_state *state)
+{
+ int ret;
+
+ s5p_csis_reset(state);
+ ret = s5p_csis_set_params(state);
+ if (ret)
+ return ret;
+
+ s5p_csis_system_enable(state, true);
+ s5p_csis_enable_interrupts(state, true);
+
+ return 0;
+}
+
+static void s5p_csis_stop_stream(struct csis_state *state)
+{
+ s5p_csis_enable_interrupts(state, false);
+ s5p_csis_system_enable(state, false);
+}
+
+static int s5p_csis_s_stream(struct v4l2_subdev *sd, int enable)
+{
+ struct csis_state *state = sd_to_csis_state(sd);
+ int ret = 0;
+
+ v4l2_dbg(1, debug, sd, "%s: %d, state: 0x%x\n",
+ __func__, enable, state->flags);
+
+ if (enable) {
+ ret = pm_runtime_get_sync(&state->pdev->dev);
+ if (ret && ret != 1)
+ return ret;
+ }
+
+ mutex_lock(&state->lock);
+ if (state->flags & ST_SUSPENDED) {
+ ret = -EBUSY;
+ goto unlock;
+ }
+
+ if (enable && state->use_count++ == 0) {
+ ret = s5p_csis_start_stream(state);
+ if (!ret)
+ state->flags |= ST_STREAMING;
+ } else if (!enable) {
+ if (!(WARN(state->use_count == 0,
+ "usage count is already 0\n"))) {
+ if (--(state->use_count) == 0) {
+ s5p_csis_stop_stream(state);
+ state->flags &= ~ST_STREAMING;
+ }
+ }
+ }
+unlock:
+ mutex_unlock(&state->lock);
+ if (!enable)
+ pm_runtime_put(&state->pdev->dev);
+ return ret;
+}
+
+static int s5p_csis_enum_mbus_code(struct v4l2_subdev *sd,
+ struct v4l2_subdev_fh *fh,
+ struct v4l2_subdev_mbus_code_enum *code)
+{
+ if (code->index >= ARRAY_SIZE(s5p_csis_formats))
+ return -EINVAL;
+
+ code->code = s5p_csis_formats[code->index].code;
+ return 0;
+}
+
+static void s5p_csis_try_format(struct v4l2_mbus_framefmt *mf)
+{
+ struct csis_pix_format const *csis_fmt;
+
+ csis_fmt = find_csis_format(mf);
+ if (csis_fmt == NULL)
+ csis_fmt = &s5p_csis_formats[0];
+
+ mf->code = csis_fmt->code;
+ v4l_bound_align_image(&mf->width, 1, CSIS_MAX_PIX_WIDTH,
+ csis_fmt->pix_hor_align,
+ &mf->height, 1, CSIS_MAX_PIX_HEIGHT, 1,
+ 0);
+}
+
+static int s5p_csis_set_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
+ struct v4l2_subdev_format *fmt)
+{
+ struct csis_state *state = sd_to_csis_state(sd);
+ struct v4l2_mbus_framefmt *mf = &fmt->format;
+ struct csis_pix_format const *csis_fmt = find_csis_format(mf);
+
+ v4l2_dbg(1, debug, sd, "%s: %dx%d, code: %x, csis_fmt: %p\n",
+ __func__, mf->width, mf->height, mf->code, csis_fmt);
+
+ if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
+ s5p_csis_try_format(mf);
+ state->mf[CSIS_FMT_TRY] = *mf;
+ return 0;
+ }
+
+ /* Both source and sink pad have always same format. */
+ if (!IS_CSIS_PAD_VALID(fmt->pad) ||
+ csis_fmt == NULL ||
+ mf->width > CSIS_MAX_PIX_WIDTH ||
+ mf->height > CSIS_MAX_PIX_HEIGHT ||
+ mf->width & (u32)(csis_fmt->pix_hor_align - 1))
+ return -EINVAL;
+
+ mutex_lock(&state->lock);
+ state->mf[CSIS_FMT_ACTIVE] = *mf;
+ state->csis_fmt = csis_fmt;
+ mutex_unlock(&state->lock);
+
+ return 0;
+}
+
+static int s5p_csis_get_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
+ struct v4l2_subdev_format *fmt)
+{
+ struct csis_state *state = sd_to_csis_state(sd);
+ int index = fmt->which == V4L2_SUBDEV_FORMAT_TRY ?
+ CSIS_FMT_TRY : CSIS_FMT_ACTIVE;
+
+ if (!IS_CSIS_PAD_VALID(fmt->pad))
+ return -EINVAL;
+
+ mutex_lock(&state->lock);
+ fmt->format = state->mf[index];
+ mutex_unlock(&state->lock);
+
+ return 0;
+}
+
+static struct v4l2_subdev_core_ops s5p_csis_core_ops = {
+ .s_power = s5p_csis_s_power,
+};
+
+static struct v4l2_subdev_pad_ops s5p_csis_pad_ops = {
+ .enum_mbus_code = s5p_csis_enum_mbus_code,
+ .get_fmt = s5p_csis_get_fmt,
+ .set_fmt = s5p_csis_set_fmt,
+};
+
+static struct v4l2_subdev_video_ops s5p_csis_video_ops = {
+ .s_stream = s5p_csis_s_stream,
+};
+
+static struct v4l2_subdev_ops s5p_csis_subdev_ops = {
+ .core = &s5p_csis_core_ops,
+ .pad = &s5p_csis_pad_ops,
+ .video = &s5p_csis_video_ops,
+};
+
+static irqreturn_t s5p_csis_isr(int irq, void *dev_id)
+{
+ struct csis_state *state = dev_id;
+ u32 reg;
+
+ /* Just clear the interrupt pending bits. */
+ reg = readl(state->regs + S5P_CSIS_INTSRC);
+ writel(reg, state->regs + S5P_CSIS_INTSRC);
+
+ return IRQ_HANDLED;
+}
+
+static int s5p_csis_probe(struct platform_device *pdev)
+{
+ struct s5p_platform_mipi_csis *pdata;
+ struct resource *mem_res;
+ struct resource *regs_res;
+ struct csis_state *state;
+ struct media_entity *entity;
+ int ret = -ENODEV;
+
+ state = kzalloc(sizeof(*state), GFP_KERNEL);
+ if (!state)
+ return -ENOMEM;
+
+ mutex_init(&state->lock);
+ state->pdev = pdev;
+
+ pdata = pdev->dev.platform_data;
+ if (pdata == NULL || pdata->phy_enable == NULL) {
+ dev_err(&pdev->dev, "Platform data not fully specified\n");
+ goto e_free;
+ }
+
+ if ((pdev->id == 1 && pdata->lanes > CSIS1_MAX_LANES) ||
+ pdata->lanes > CSIS0_MAX_LANES) {
+ dev_err(&pdev->dev, "Unsupported number of data lanes: %d\n",
+ pdata->lanes);
+ goto e_free;
+ }
+
+ mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!mem_res) {
+ dev_err(&pdev->dev, "Failed to get io memory region\n");
+ goto e_free;
+ }
+
+ regs_res = request_mem_region(mem_res->start, resource_size(mem_res),
+ pdev->name);
+ if (!regs_res) {
+ dev_err(&pdev->dev, "Failed to request io memory region\n");
+ goto e_free;
+ }
+ state->regs_res = regs_res;
+
+ state->regs = ioremap(mem_res->start, resource_size(mem_res));
+ if (!state->regs) {
+ dev_err(&pdev->dev, "Failed to remap io region\n");
+ goto e_reqmem;
+ }
+
+ if (s5p_csis_clk_get(state))
+ goto e_unmap;
+
+ clk_enable(state->clock[CSIS_CLK_MUX]);
+ if (pdata->clk_rate)
+ clk_set_rate(state->clock[CSIS_CLK_MUX], pdata->clk_rate);
+ else
+ dev_warn(&pdev->dev, "No clock frequency specified!\n");
+
+ state->irq = platform_get_irq(pdev, 0);
+ if (state->irq < 0) {
+ dev_err(&pdev->dev, "Failed to get irq\n");
+ goto e_clkput;
+ }
+
+ if (!pdata->fixed_phy_vdd) {
+ state->supply = regulator_get(&pdev->dev, "vdd");
+ if (IS_ERR(state->supply)) {
+ state->supply = NULL;
+ goto e_clkput;
+ }
+ }
+
+ ret = request_irq(state->irq, s5p_csis_isr, 0, CSIS_MODULE_NAME, state);
+ if (ret) {
+ dev_err(&pdev->dev, "request_irq failed\n");
+ goto e_regput;
+ }
+
+ v4l2_subdev_init(&state->sd, &s5p_csis_subdev_ops);
+ state->sd.owner = THIS_MODULE;
+ strlcpy(state->sd.name, CSIS_MODULE_NAME, sizeof(state->sd.name));
+ state->sd.grp_id = CSIS_GRP_ID;
+
+ entity = &state->sd.entity;
+ state->pads[CSIS_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
+ state->pads[CSIS_PAD_SOURCE].flags = MEDIA_PAD_FL_SOURCE;
+ ret = media_entity_init(&state->sd.entity,
+ CSIS_PADS_NUM, state->pads, 0);
+ if (ret < 0)
+ goto e_irqfree;
+
+ /* This allows to retrieve the platform device id by the host driver */
+ v4l2_set_subdevdata(&state->sd, pdev);
+
+ /* .. and a pointer to the subdev. */
+ platform_set_drvdata(pdev, &state->sd);
+
+ pm_runtime_enable(&pdev->dev);
+
+ return 0;
+
+e_irqfree:
+ free_irq(state->irq, state);
+e_regput:
+ if (state->supply)
+ regulator_put(state->supply);
+e_clkput:
+ clk_disable(state->clock[CSIS_CLK_MUX]);
+ s5p_csis_clk_put(state);
+e_unmap:
+ iounmap(state->regs);
+e_reqmem:
+ release_mem_region(regs_res->start, resource_size(regs_res));
+e_free:
+ kfree(state);
+ return ret;
+}
+
+#ifdef CONFIG_SUSPEND
+static int s5p_csis_suspend(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct v4l2_subdev *sd = platform_get_drvdata(pdev);
+ struct csis_state *state = sd_to_csis_state(sd);
+
+ v4l2_dbg(1, debug, sd, "%s: flags: 0x%x\n",
+ __func__, state->flags);
+
+ mutex_lock(&state->lock);
+ if (state->flags & ST_POWERED) {
+ s5p_csis_stop_stream(state);
+ clk_disable(state->clock[CSIS_CLK_GATE]);
+ __csis_set_power(state, 0);
+ }
+ state->flags |= ST_SUSPENDED;
+ mutex_unlock(&state->lock);
+
+ return 0;
+}
+
+static int s5p_csis_resume(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct v4l2_subdev *sd = platform_get_drvdata(pdev);
+ struct csis_state *state = sd_to_csis_state(sd);
+
+ v4l2_dbg(1, debug, sd, "%s: flags: 0x%x\n",
+ __func__, state->flags);
+
+ mutex_lock(&state->lock);
+ if (!(state->flags & ST_POWERED)) {
+ __csis_set_power(state, 1);
+ clk_enable(state->clock[CSIS_CLK_GATE]);
+ }
+
+ if (state->flags & ST_STREAMING)
+ s5p_csis_start_stream(state);
+
+ state->flags &= ~ST_SUSPENDED;
+ mutex_unlock(&state->lock);
+
+ return 0;
+}
+
+static int s5p_csis_pm_suspend(struct device *dev)
+{
+ return s5p_csis_suspend(dev);
+}
+
+static int s5p_csis_pm_resume(struct device *dev)
+{
+ int ret;
+
+ ret = s5p_csis_resume(dev);
+
+ if (!ret) {
+ pm_runtime_disable(dev);
+ ret = pm_runtime_set_active(dev);
+ pm_runtime_enable(dev);
+ }
+
+ return ret;
+}
+#else
+#define s5p_csis_pm_suspend NULL
+#define s5p_csis_pm_resume NULL
+#endif
+
+#ifdef CONFIG_PM_RUNTIME
+static int s5p_csis_runtime_suspend(struct device *dev)
+{
+ return s5p_csis_suspend(dev);
+}
+
+static int s5p_csis_runtime_resume(struct device *dev)
+{
+ return s5p_csis_resume(dev);
+}
+
+#else
+#define s5p_csis_runtime_suspend NULL
+#define s5p_csis_runtime_resume NULL
+#endif
+
+static int s5p_csis_remove(struct platform_device *pdev)
+{
+ struct v4l2_subdev *sd = platform_get_drvdata(pdev);
+ struct csis_state *state = sd_to_csis_state(sd);
+ struct resource *res = state->regs_res;
+
+ pm_runtime_disable(&pdev->dev);
+ s5p_csis_suspend(&pdev->dev);
+ clk_disable(state->clock[CSIS_CLK_MUX]);
+ pm_runtime_set_suspended(&pdev->dev);
+
+ s5p_csis_clk_put(state);
+ if (state->supply)
+ regulator_put(state->supply);
+
+ media_entity_cleanup(&state->sd.entity);
+ free_irq(state->irq, state);
+ iounmap(state->regs);
+ release_mem_region(res->start, resource_size(res));
+ kfree(state);
+
+ return 0;
+}
+
+static const struct dev_pm_ops s5p_csis_pm_ops = {
+ .runtime_suspend = s5p_csis_runtime_suspend,
+ .runtime_resume = s5p_csis_runtime_resume,
+ .suspend = s5p_csis_pm_suspend,
+ .resume = s5p_csis_pm_resume,
+};
+
+static struct platform_driver s5p_csis_driver = {
+ .probe = s5p_csis_probe,
+ .remove = s5p_csis_remove,
+ .driver = {
+ .name = CSIS_MODULE_NAME,
+ .owner = THIS_MODULE,
+ .pm = &s5p_csis_pm_ops,
+ },
+};
+
+static int __init s5p_csis_init(void)
+{
+ return platform_driver_probe(&s5p_csis_driver, s5p_csis_probe);
+}
+
+static void __exit s5p_csis_exit(void)
+{
+ platform_driver_unregister(&s5p_csis_driver);
+}
+
+module_init(s5p_csis_init);
+module_exit(s5p_csis_exit);
+
+MODULE_AUTHOR("Sylwester Nawrocki <s.nawrocki@xxxxxxxxxxx>");
+MODULE_DESCRIPTION("S5P/EXYNOS4 MIPI CSI receiver driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/media/video/s5p-fimc/mipi-csis.h b/drivers/media/video/s5p-fimc/mipi-csis.h
new file mode 100644
index 0000000..95e9011
--- /dev/null
+++ b/drivers/media/video/s5p-fimc/mipi-csis.h
@@ -0,0 +1,19 @@
+/*
+ * Samsung S5P/EXYNOS4 SoC series MIPI-CSI receiver driver
+ *
+ * Copyright (C) 2011 Samsung Electronics Co., Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#define CSIS_MODULE_NAME "s5p-mipi-csis"
+#define CSIS_MAX_ENTITIES 2
+#define CSIS0_MAX_LANES 4
+#define CSIS1_MAX_LANES 2
+
+#define CSIS_GRP_ID (1 << 8)
+#define CSIS_PAD_SINK 0
+#define CSIS_PAD_SOURCE 1
+#define CSIS_PADS_NUM 2
--
1.7.4.3
--
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