From: Libin Yang <lbyang@xxxxxxxxxxx>
This patch adds the MIPI support for marvell-ccic.
Board driver should determine whether using MIPI or not.
Signed-off-by: Albert Wang <twang13@xxxxxxxxxxx>
Signed-off-by: Libin Yang <lbyang@xxxxxxxxxxx>
---
drivers/media/platform/marvell-ccic/mcam-core.c | 66 +++++++++++++
drivers/media/platform/marvell-ccic/mcam-core.h | 28 +++++-
drivers/media/platform/marvell-ccic/mmp-driver.c | 113 +++++++++++++++++++++-
include/media/mmp-camera.h | 10 ++
4 files changed, 214 insertions(+), 3 deletions(-)
diff --git a/drivers/media/platform/marvell-ccic/mcam-core.c b/drivers/media/platform/marvell-ccic/mcam-core.c
index 7012913f..7e178d8 100755
--- a/drivers/media/platform/marvell-ccic/mcam-core.c
+++ b/drivers/media/platform/marvell-ccic/mcam-core.c
@@ -19,6 +19,7 @@
#include <linux/delay.h>
#include <linux/vmalloc.h>
#include <linux/io.h>
+#include <linux/clk.h>
#include <linux/videodev2.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
@@ -253,6 +254,39 @@ static void mcam_ctlr_stop(struct mcam_camera *cam)
mcam_reg_clear_bit(cam, REG_CTRL0, C0_ENABLE);
}
+static int mcam_config_mipi(struct mcam_camera *mcam, int enable)
+{
+ if (mcam->bus_type == V4L2_MBUS_CSI2 && enable) {
+ /* Using MIPI mode and enable MIPI */
+ cam_dbg(mcam, "camera: DPHY3=0x%x, DPHY5=0x%x, DPHY6=0x%x\n",
+ mcam->dphy[0], mcam->dphy[1], mcam->dphy[2]);
+ mcam_reg_write(mcam, REG_CSI2_DPHY3, mcam->dphy[0]);
+ mcam_reg_write(mcam, REG_CSI2_DPHY5, mcam->dphy[1]);
+ mcam_reg_write(mcam, REG_CSI2_DPHY6, mcam->dphy[2]);
+
+ if (mcam->mipi_enabled == 0) {
+ BUG_ON(mcam->lane > 4 || mcam->lane <= 0);
+ /*
+ * 0x41 actives 1 lane
+ * 0x43 actives 2 lanes
+ * 0x45 actives 3 lanes (never happen)
+ * 0x47 actives 4 lanes
+ */
+ mcam_reg_write(mcam, REG_CSI2_CTRL0,
+ CSI2_C0_MIPI_EN | CSI2_C0_ACT_LANE(mcam->lane));
+ mcam->mipi_enabled = 1;
+ }
+ } else {
+ /* Using Parallel mode or disable MIPI */
+ mcam_reg_write(mcam, REG_CSI2_CTRL0, 0x0);
+ mcam_reg_write(mcam, REG_CSI2_DPHY3, 0x0);
+ mcam_reg_write(mcam, REG_CSI2_DPHY5, 0x0);
+ mcam_reg_write(mcam, REG_CSI2_DPHY6, 0x0);
+ mcam->mipi_enabled = 0;
+ }
+ return 0;
+}
+
/* ------------------------------------------------------------------- */
#ifdef MCAM_MODE_VMALLOC
@@ -656,6 +690,13 @@ static void mcam_ctlr_image(struct mcam_camera *cam)
*/
mcam_reg_write_mask(cam, REG_CTRL0, C0_SIF_HVSYNC,
C0_SIFM_MASK);
+
+ /*
+ * This field controls the generation of EOF(DVP only)
+ */
+ if (cam->bus_type != V4L2_MBUS_CSI2)
+ mcam_reg_set_bit(cam, REG_CTRL0,
+ C0_EOF_VSYNC | C0_VEDGE_CTRL);
}
@@ -886,6 +927,16 @@ static int mcam_read_setup(struct mcam_camera *cam)
spin_lock_irqsave(&cam->dev_lock, flags);
clear_bit(CF_DMA_ACTIVE, &cam->flags);
mcam_reset_buffers(cam);
+ /*
+ * Update CSI2_DPHY value
+ */
+ if (cam->calc_dphy)
+ cam->calc_dphy(cam);
+ cam_dbg(cam, "camera: DPHY sets: dphy3=0x%x, dphy5=0x%x, dphy6=0x%x\n",
+ cam->dphy[0], cam->dphy[1], cam->dphy[2]);
+ ret = mcam_config_mipi(cam, 1);
+ if (ret < 0)
+ return ret;
mcam_ctlr_irq_enable(cam);
cam->state = S_STREAMING;
if (!test_bit(CF_SG_RESTART, &cam->flags))
@@ -1551,6 +1602,16 @@ static int mcam_v4l_open(struct file *filp)
mcam_set_config_needed(cam, 1);
}
(cam->users)++;
+ if (cam->bus_type == V4L2_MBUS_CSI2) {
+ cam->pll1 = devm_clk_get(cam->dev, "pll1");
+ if (IS_ERR_OR_NULL(cam->pll1) && cam->dphy[2] == 0) {
+ cam_err(cam, "Could not get pll1 clock\n");
+ if (IS_ERR(cam->pll1))
+ ret = PTR_ERR(cam->pll1);
+ else
+ ret = -EINVAL;
+ }
+ }
out:
mutex_unlock(&cam->s_mutex);
return ret;
@@ -1569,10 +1630,15 @@ static int mcam_v4l_release(struct file *filp)
if (cam->users == 0) {
mcam_ctlr_stop_dma(cam);
mcam_cleanup_vb2(cam);
+ mcam_config_mipi(cam, 0);
mcam_ctlr_power_down(cam);
if (cam->buffer_mode == B_vmalloc && alloc_bufs_at_read)
mcam_free_dma_bufs(cam);
}
+ if (cam->bus_type == V4L2_MBUS_CSI2) {
+ devm_clk_put(cam->dev, cam->pll1);
+ cam->pll1 = NULL;
+ }
mutex_unlock(&cam->s_mutex);
return 0;
}
diff --git a/drivers/media/platform/marvell-ccic/mcam-core.h b/drivers/media/platform/marvell-ccic/mcam-core.h
index 5e802c6..f73a801 100755
--- a/drivers/media/platform/marvell-ccic/mcam-core.h
+++ b/drivers/media/platform/marvell-ccic/mcam-core.h
@@ -101,11 +101,21 @@ struct mcam_camera {
short int clock_speed; /* Sensor clock speed, default 30 */
short int use_smbus; /* SMBUS or straight I2c? */
enum mcam_buffer_mode buffer_mode;
+
+ enum v4l2_mbus_type bus_type;
+ /* MIPI support */
+ int *dphy;
+ int mipi_enabled;
+ int lane; /* lane number */
+
+ struct clk *pll1;
+
/*
* Callbacks from the core to the platform code.
*/
void (*plat_power_up) (struct mcam_camera *cam);
void (*plat_power_down) (struct mcam_camera *cam);
+ void (*calc_dphy) (struct mcam_camera *cam);
/*
* Everything below here is private to the mcam core and
@@ -218,6 +228,17 @@ int mccic_resume(struct mcam_camera *cam);
#define REG_Y0BAR 0x00
#define REG_Y1BAR 0x04
#define REG_Y2BAR 0x08
+
+/*
+ * register definitions for MIPI support
+ */
+#define REG_CSI2_CTRL0 0x100
+#define CSI2_C0_MIPI_EN (0x1 << 0)
+#define CSI2_C0_ACT_LANE(n) ((n-1) << 1)
+#define REG_CSI2_DPHY3 0x12c
+#define REG_CSI2_DPHY5 0x134
+#define REG_CSI2_DPHY6 0x138
+
/* ... */
#define REG_IMGPITCH 0x24 /* Image pitch register */
@@ -286,13 +307,16 @@ int mccic_resume(struct mcam_camera *cam);
#define C0_YUVE_XUVY 0x00020000 /* 420: .UVY */
#define C0_YUVE_XVUY 0x00030000 /* 420: .VUY */
/* Bayer bits 18,19 if needed */
+#define C0_EOF_VSYNC 0x00400000 /* Generate EOF by VSYNC */
+#define C0_VEDGE_CTRL 0x00800000 /* Detect falling edge of VSYNC */
#define C0_HPOL_LOW 0x01000000 /* HSYNC polarity active low */
#define C0_VPOL_LOW 0x02000000 /* VSYNC polarity active low */
#define C0_VCLK_LOW 0x04000000 /* VCLK on falling edge */
#define C0_DOWNSCALE 0x08000000 /* Enable downscaler */
-#define C0_SIFM_MASK 0xc0000000 /* SIF mode bits */
+/* SIFMODE */
#define C0_SIF_HVSYNC 0x00000000 /* Use H/VSYNC */
-#define CO_SOF_NOSYNC 0x40000000 /* Use inband active signaling */
+#define C0_SOF_NOSYNC 0x40000000 /* Use inband active signaling */
+#define C0_SIFM_MASK 0xc0000000 /* SIF mode bits */
/* Bits below C1_444ALPHA are not present in Cafe */
#define REG_CTRL1 0x40 /* Control 1 */
diff --git a/drivers/media/platform/marvell-ccic/mmp-driver.c b/drivers/media/platform/marvell-ccic/mmp-driver.c
index c4c17fe..7ab01e9 100755
--- a/drivers/media/platform/marvell-ccic/mmp-driver.c
+++ b/drivers/media/platform/marvell-ccic/mmp-driver.c
@@ -27,6 +27,7 @@
#include <linux/delay.h>
#include <linux/list.h>
#include <linux/pm.h>
+#include <linux/clk.h>
#include "mcam-core.h"
@@ -152,6 +153,103 @@ static void mmpcam_power_down(struct mcam_camera *mcam)
gpio_set_value(pdata->sensor_reset_gpio, 0);
}
+/*
+ * calc the dphy register values
+ * There are three dphy registers being used.
+ * dphy[0] - CSI2_DPHY3
+ * dphy[1] - CSI2_DPHY5
+ * dphy[2] - CSI2_DPHY6
+ * CSI2_DPHY3 and CSI2_DPHY6 can be set with a default value
+ * or be calculated dynamically
+ */
+void mmpcam_calc_dphy(struct mcam_camera *mcam)
+{
+ struct mmp_camera *cam = mcam_to_cam(mcam);
+ struct mmp_camera_platform_data *pdata = cam->pdev->dev.platform_data;
+ struct device *dev = &cam->pdev->dev;
+ unsigned long tx_clk_esc;
+
+ /*
+ * If CSI2_DPHY3 is calculated dynamically,
+ * pdata->lane_clk should be already set
+ * either in the board driver statically
+ * or in the sensor driver dynamically.
+ */
+ /*
+ * dphy[0] - CSI2_DPHY3:
+ * bit 0 ~ bit 7: HS Term Enable.
+ * defines the time that the DPHY
+ * wait before enabling the data
+ * lane termination after detecting
+ * that the sensor has driven the data
+ * lanes to the LP00 bridge state.
+ * The value is calculated by:
+ * (Max T(D_TERM_EN)/Period(DDR)) - 1
+ * bit 8 ~ bit 15: HS_SETTLE
+ * Time interval during which the HS
+ * receiver shall ignore any Data Lane
+ * HS transistions.
+ * The vaule has been calibrated on
+ * different boards. It seems to work well.
+ *
+ * More detail please refer
+ * MIPI Alliance Spectification for D-PHY
+ * document for explanation of HS-SETTLE
+ * and D-TERM-EN.
+ */
+ switch (pdata->dphy3_algo) {
+ case 1:
+ /*
+ * dphy3_algo == 1
+ * Calculate CSI2_DPHY3 algo for PXA910
+ */
+ pdata->dphy[0] = ((1 + pdata->lane_clk * 80 / 1000) & 0xff) << 8
+ | (1 + pdata->lane_clk * 35 / 1000);
+ break;
+ case 2:
+ /*
+ * dphy3_algo == 2
+ * Calculate CSI2_DPHY3 algo for PXA2128
+ */
+ pdata->dphy[0] =
+ ((2 + pdata->lane_clk * 110 / 1000) & 0xff) << 8
+ | (1 + pdata->lane_clk * 35 / 1000);
+ break;
+ default:
+ /*
+ * dphy3_algo == 0
+ * Use default CSI2_DPHY3 value for PXA688/PXA988
+ */
+ dev_dbg(dev, "camera: use the default CSI2_DPHY3 value\n");
+ }
+
+ /*
+ * pll1 will never be changed, it is a fixed value
+ */
+
+ if (IS_ERR_OR_NULL(mcam->pll1))
+ return;
+
+ /* get the escape clk, this is hard coded */
+ tx_clk_esc = (clk_get_rate(mcam->pll1) / 1000000) / 12;
+
+ /*
+ * dphy[2] - CSI2_DPHY6:
+ * bit 0 ~ bit 7: CK Term Enable
+ * Time for the Clock Lane receiver to enable the HS line
+ * termination. The value is calculated similarly with
+ * HS Term Enable
+ * bit 8 ~ bit 15: CK Settle
+ * Time interval during which the HS receiver shall ignore
+ * any Clock Lane HS transitions.
+ * The value is calibrated on the boards.
+ */
+ pdata->dphy[2] = ((534 * tx_clk_esc / 2000 - 1) & 0xff) << 8
+ | ((38 * tx_clk_esc / 1000 - 1) & 0xff);
+
+ dev_dbg(dev, "camera: DPHY sets: dphy3=0x%x, dphy5=0x%x, dphy6=0x%x\n",
+ pdata->dphy[0], pdata->dphy[1], pdata->dphy[2]);
+}
static irqreturn_t mmpcam_irq(int irq, void *data)
{
@@ -174,6 +272,10 @@ static int mmpcam_probe(struct platform_device *pdev)
struct mmp_camera_platform_data *pdata;
int ret;
+ pdata = pdev->dev.platform_data;
+ if (!pdata)
+ return -ENODEV;
+
cam = kzalloc(sizeof(*cam), GFP_KERNEL);
if (cam == NULL)
return -ENOMEM;
@@ -183,8 +285,18 @@ static int mmpcam_probe(struct platform_device *pdev)
mcam = &cam->mcam;
mcam->plat_power_up = mmpcam_power_up;
mcam->plat_power_down = mmpcam_power_down;
+ mcam->calc_dphy = mmpcam_calc_dphy;
mcam->dev = &pdev->dev;
mcam->use_smbus = 0;
+ mcam->bus_type = pdata->bus_type;
+ mcam->dphy = pdata->dphy;
+ /* mosetly it won't happen. dphy is an array in pdata, but in case .. */
+ if (unlikely(mcam->dphy == NULL)) {
+ ret = -EINVAL;
+ goto out_free;
+ }
+ mcam->mipi_enabled = 0;
+ mcam->lane = pdata->lane;
mcam->chip_id = V4L2_IDENT_ARMADA610;
mcam->buffer_mode = B_DMA_sg;
spin_lock_init(&mcam->dev_lock);
@@ -223,7 +335,6 @@ static int mmpcam_probe(struct platform_device *pdev)
* Find the i2c adapter. This assumes, of course, that the
* i2c bus is already up and functioning.
*/
- pdata = pdev->dev.platform_data;
mcam->i2c_adapter = platform_get_drvdata(pdata->i2c_device);
if (mcam->i2c_adapter == NULL) {
ret = -ENODEV;
diff --git a/include/media/mmp-camera.h b/include/media/mmp-camera.h
index 7611963..813efe2 100755
--- a/include/media/mmp-camera.h
+++ b/include/media/mmp-camera.h
@@ -1,3 +1,4 @@
+#include <media/v4l2-mediabus.h>
/*
* Information for the Marvell Armada MMP camera
*/
@@ -6,4 +7,13 @@ struct mmp_camera_platform_data {
struct platform_device *i2c_device;
int sensor_power_gpio;
int sensor_reset_gpio;
+ enum v4l2_mbus_type bus_type;
+ /*
+ * MIPI support
+ */
+ int dphy[3]; /* DPHY: CSI2_DPHY3, CSI2_DPHY5, CSI2_DPHY6 */
+ int dphy3_algo; /* Exist 2 algos for calculate CSI2_DPHY3 */
+ int mipi_enabled; /* MIPI enabled flag */
+ int lane; /* ccic used lane number; 0 means DVP mode */
+ int lane_clk;
};
--
1.7.9.5
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