[PATCH v2 2/4] media: i2c: mt9t112: Remove soc_camera dependencies

From: Jacopo Mondi
Date: Mon Mar 12 2018 - 10:04:36 EST

Remove soc_camera framework dependencies from mt9t112 sensor driver.
- Handle clk, gpios and power routines
- Register async subdev
- Remove deprecated g/s_mbus_config operations
- Remove driver flags
- Change driver interface and add kernel doc
- Adjust build system
- Fix code style issues reported by checkpatch in strict mode

This commit does not remove the original soc_camera based driver as long
as other platforms depends on soc_camera framework.

As I don't have access to a working camera module, this change has only
been compile tested.

Signed-off-by: Jacopo Mondi <jacopo+renesas@xxxxxxxxxx>
---
drivers/media/i2c/Kconfig | 11 +
drivers/media/i2c/Makefile | 1 +
drivers/media/i2c/mt9t112.c | 403 ++++++++++++++++-----------------
drivers/media/i2c/soc_camera/mt9t112.c | 2 +-
include/media/i2c/mt9t112.h | 17 +-
5 files changed, 210 insertions(+), 224 deletions(-)

diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
index d7bba0e..541f0d28 100644
--- a/drivers/media/i2c/Kconfig
+++ b/drivers/media/i2c/Kconfig
@@ -788,6 +788,17 @@ config VIDEO_MT9T001
This is a Video4Linux2 sensor-level driver for the Aptina
(Micron) mt0t001 3 Mpixel camera.

+config VIDEO_MT9T112
+ tristate "Aptina MT9T111/MT9T112 support"
+ depends on I2C && VIDEO_V4L2
+ depends on MEDIA_CAMERA_SUPPORT
+ ---help---
+ This is a Video4Linux2 sensor-level driver for the Aptina
+ (Micron) MT9T111 and MT9T112 3 Mpixel camera.
+
+ To compile this driver as a module, choose M here: the
+ module will be called mt9t112.
+
config VIDEO_MT9V011
tristate "Micron mt9v011 sensor support"
depends on I2C && VIDEO_V4L2
diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile
index cc30178..ea34aee 100644
--- a/drivers/media/i2c/Makefile
+++ b/drivers/media/i2c/Makefile
@@ -80,6 +80,7 @@ obj-$(CONFIG_VIDEO_MT9M032) += mt9m032.o
obj-$(CONFIG_VIDEO_MT9M111) += mt9m111.o
obj-$(CONFIG_VIDEO_MT9P031) += mt9p031.o
obj-$(CONFIG_VIDEO_MT9T001) += mt9t001.o
+obj-$(CONFIG_VIDEO_MT9T112) += mt9t112.o
obj-$(CONFIG_VIDEO_MT9V011) += mt9v011.o
obj-$(CONFIG_VIDEO_MT9V032) += mt9v032.o
obj-$(CONFIG_VIDEO_SR030PC30) += sr030pc30.o
diff --git a/drivers/media/i2c/mt9t112.c b/drivers/media/i2c/mt9t112.c
index 297d22e..af8cca9 100644
--- a/drivers/media/i2c/mt9t112.c
+++ b/drivers/media/i2c/mt9t112.c
@@ -1,6 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* mt9t112 Camera Driver
*
+ * Copyright (C) 2018 Jacopo Mondi <jacopo+renesas@xxxxxxxxxx>
+ *
* Copyright (C) 2009 Renesas Solutions Corp.
* Kuninori Morimoto <morimoto.kuninori@xxxxxxxxxxx>
*
@@ -12,12 +15,14 @@
* Copyright (C) 2008 Magnus Damm
* Copyright (C) 2008, Guennadi Liakhovetski <kernel@xxxxxxxxxxxxxx>
*
- * 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.
+ * TODO: This driver lacks support for frame rate control due to missing
+ * register level documentation and suitable hardware for testing.
+ * v4l-utils compliance tools will report errors.
*/

+#include <linux/clk.h>
#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/module.h>
@@ -26,17 +31,16 @@
#include <linux/videodev2.h>

#include <media/i2c/mt9t112.h>
-#include <media/soc_camera.h>
-#include <media/v4l2-clk.h>
#include <media/v4l2-common.h>
#include <media/v4l2-image-sizes.h>
+#include <media/v4l2-subdev.h>

/* you can check PLL/clock info */
/* #define EXT_CLOCK 24000000 */

/************************************************************************
- macro
-************************************************************************/
+ * macro
+ ***********************************************************************/
/*
* frame size
*/
@@ -74,8 +78,8 @@
#define VAR8(id, offset) _VAR(id, offset, 0x8000)

/************************************************************************
- struct
-************************************************************************/
+ * struct
+ ***********************************************************************/
struct mt9t112_format {
u32 code;
enum v4l2_colorspace colorspace;
@@ -85,21 +89,19 @@ struct mt9t112_format {

struct mt9t112_priv {
struct v4l2_subdev subdev;
- struct mt9t112_camera_info *info;
+ struct mt9t112_platform_data *info;
struct i2c_client *client;
struct v4l2_rect frame;
- struct v4l2_clk *clk;
+ struct clk *clk;
+ struct gpio_desc *standby_gpio;
const struct mt9t112_format *format;
int num_formats;
- u32 flags;
-/* for flags */
-#define INIT_DONE (1 << 0)
-#define PCLK_RISING (1 << 1)
+ bool init_done;
};

/************************************************************************
- supported format
-************************************************************************/
+ * supported format
+ ***********************************************************************/

static const struct mt9t112_format mt9t112_cfmts[] = {
{
@@ -136,8 +138,8 @@ static const struct mt9t112_format mt9t112_cfmts[] = {
};

/************************************************************************
- general function
-************************************************************************/
+ * general function
+ ***********************************************************************/
static struct mt9t112_priv *to_mt9t112(const struct i2c_client *client)
{
return container_of(i2c_get_clientdata(client),
@@ -164,15 +166,15 @@ static int __mt9t112_reg_read(const struct i2c_client *client, u16 command)
msg[1].buf = buf;

/*
- * if return value of this function is < 0,
- * it mean error.
- * else, under 16bit is valid data.
+ * If return value of this function is < 0, it means error, else,
+ * below 16bit is valid data.
*/
ret = i2c_transfer(client->adapter, msg, 2);
if (ret < 0)
return ret;

memcpy(&ret, buf, 2);
+
return swab16(ret);
}

@@ -195,22 +197,19 @@ static int __mt9t112_reg_write(const struct i2c_client *client,
msg.buf = buf;

/*
- * i2c_transfer return message length,
- * but this function should return 0 if correct case
+ * i2c_transfer return message length, but this function should
+ * return 0 if correct case.
*/
ret = i2c_transfer(client->adapter, &msg, 1);
- if (ret >= 0)
- ret = 0;

- return ret;
+ return ret >= 0 ? 0 : ret;
}

static int __mt9t112_reg_mask_set(const struct i2c_client *client,
- u16 command,
- u16 mask,
- u16 set)
+ u16 command, u16 mask, u16 set)
{
int val = __mt9t112_reg_read(client, command);
+
if (val < 0)
return val;

@@ -245,11 +244,10 @@ static int __mt9t112_mcu_write(const struct i2c_client *client,
}

static int __mt9t112_mcu_mask_set(const struct i2c_client *client,
- u16 command,
- u16 mask,
- u16 set)
+ u16 command, u16 mask, u16 set)
{
int val = __mt9t112_mcu_read(client, command);
+
if (val < 0)
return val;

@@ -264,7 +262,7 @@ static int mt9t112_reset(const struct i2c_client *client)
int ret;

mt9t112_reg_mask_set(ret, client, 0x001a, 0x0001, 0x0001);
- msleep(1);
+ usleep_range(1000, 5000);
mt9t112_reg_mask_set(ret, client, 0x001a, 0x0001, 0x0000);

return ret;
@@ -303,71 +301,64 @@ static int mt9t112_clock_info(const struct i2c_client *client, u32 ext)
m = n & 0x00ff;
n = (n >> 8) & 0x003f;

- enable = ((6000 > ext) || (54000 < ext)) ? "X" : "";
+ enable = ((ext < 6000) || (ext > 54000)) ? "X" : "";
dev_dbg(&client->dev, "EXTCLK : %10u K %s\n", ext, enable);

- vco = 2 * m * ext / (n+1);
- enable = ((384000 > vco) || (768000 < vco)) ? "X" : "";
+ vco = 2 * m * ext / (n + 1);
+ enable = ((vco < 384000) || (vco > 768000)) ? "X" : "";
dev_dbg(&client->dev, "VCO : %10u K %s\n", vco, enable);

- clk = vco / (p1+1) / (p2+1);
- enable = (96000 < clk) ? "X" : "";
+ clk = vco / (p1 + 1) / (p2 + 1);
+ enable = (clk > 96000) ? "X" : "";
dev_dbg(&client->dev, "PIXCLK : %10u K %s\n", clk, enable);

- clk = vco / (p3+1);
- enable = (768000 < clk) ? "X" : "";
+ clk = vco / (p3 + 1);
+ enable = (clk > 768000) ? "X" : "";
dev_dbg(&client->dev, "MIPICLK : %10u K %s\n", clk, enable);

- clk = vco / (p6+1);
- enable = (96000 < clk) ? "X" : "";
+ clk = vco / (p6 + 1);
+ enable = (clk > 96000) ? "X" : "";
dev_dbg(&client->dev, "MCU CLK : %10u K %s\n", clk, enable);

- clk = vco / (p5+1);
- enable = (54000 < clk) ? "X" : "";
+ clk = vco / (p5 + 1);
+ enable = (clk > 54000) ? "X" : "";
dev_dbg(&client->dev, "SOC CLK : %10u K %s\n", clk, enable);

- clk = vco / (p4+1);
- enable = (70000 < clk) ? "X" : "";
+ clk = vco / (p4 + 1);
+ enable = (clk > 70000) ? "X" : "";
dev_dbg(&client->dev, "Sensor CLK : %10u K %s\n", clk, enable);

- clk = vco / (p7+1);
+ clk = vco / (p7 + 1);
dev_dbg(&client->dev, "External sensor : %10u K\n", clk);

- clk = ext / (n+1);
- enable = ((2000 > clk) || (24000 < clk)) ? "X" : "";
+ clk = ext / (n + 1);
+ enable = ((clk < 2000) || (clk > 24000)) ? "X" : "";
dev_dbg(&client->dev, "PFD : %10u K %s\n", clk, enable);

return 0;
}
#endif

-static void mt9t112_frame_check(u32 *width, u32 *height, u32 *left, u32 *top)
-{
- soc_camera_limit_side(left, width, 0, 0, MAX_WIDTH);
- soc_camera_limit_side(top, height, 0, 0, MAX_HEIGHT);
-}
-
static int mt9t112_set_a_frame_size(const struct i2c_client *client,
- u16 width,
- u16 height)
+ u16 width, u16 height)
{
int ret;
u16 wstart = (MAX_WIDTH - width) / 2;
u16 hstart = (MAX_HEIGHT - height) / 2;

- /* (Context A) Image Width/Height */
+ /* (Context A) Image Width/Height. */
mt9t112_mcu_write(ret, client, VAR(26, 0), width);
mt9t112_mcu_write(ret, client, VAR(26, 2), height);

- /* (Context A) Output Width/Height */
+ /* (Context A) Output Width/Height. */
mt9t112_mcu_write(ret, client, VAR(18, 43), 8 + width);
mt9t112_mcu_write(ret, client, VAR(18, 45), 8 + height);

- /* (Context A) Start Row/Column */
+ /* (Context A) Start Row/Column. */
mt9t112_mcu_write(ret, client, VAR(18, 2), 4 + hstart);
mt9t112_mcu_write(ret, client, VAR(18, 4), 4 + wstart);

- /* (Context A) End Row/Column */
+ /* (Context A) End Row/Column. */
mt9t112_mcu_write(ret, client, VAR(18, 6), 11 + height + hstart);
mt9t112_mcu_write(ret, client, VAR(18, 8), 11 + width + wstart);

@@ -377,35 +368,27 @@ static int mt9t112_set_a_frame_size(const struct i2c_client *client,
}

static int mt9t112_set_pll_dividers(const struct i2c_client *client,
- u8 m, u8 n,
- u8 p1, u8 p2, u8 p3,
- u8 p4, u8 p5, u8 p6,
- u8 p7)
+ u8 m, u8 n, u8 p1, u8 p2, u8 p3, u8 p4,
+ u8 p5, u8 p6, u8 p7)
{
int ret;
u16 val;

/* N/M */
- val = (n << 8) |
- (m << 0);
+ val = (n << 8) | (m << 0);
mt9t112_reg_mask_set(ret, client, 0x0010, 0x3fff, val);

/* P1/P2/P3 */
- val = ((p3 & 0x0F) << 8) |
- ((p2 & 0x0F) << 4) |
- ((p1 & 0x0F) << 0);
+ val = ((p3 & 0x0F) << 8) | ((p2 & 0x0F) << 4) | ((p1 & 0x0F) << 0);
mt9t112_reg_mask_set(ret, client, 0x0012, 0x0fff, val);

/* P4/P5/P6 */
- val = (0x7 << 12) |
- ((p6 & 0x0F) << 8) |
- ((p5 & 0x0F) << 4) |
+ val = (0x7 << 12) | ((p6 & 0x0F) << 8) | ((p5 & 0x0F) << 4) |
((p4 & 0x0F) << 0);
mt9t112_reg_mask_set(ret, client, 0x002A, 0x7fff, val);

/* P7 */
- val = (0x1 << 12) |
- ((p7 & 0x0F) << 0);
+ val = (0x1 << 12) | ((p7 & 0x0F) << 0);
mt9t112_reg_mask_set(ret, client, 0x002C, 0x100f, val);

return ret;
@@ -418,19 +401,15 @@ static int mt9t112_init_pll(const struct i2c_client *client)

mt9t112_reg_mask_set(ret, client, 0x0014, 0x003, 0x0001);

- /* PLL control: BYPASS PLL = 8517 */
+ /* PLL control: BYPASS PLL = 8517. */
mt9t112_reg_write(ret, client, 0x0014, 0x2145);

- /* Replace these registers when new timing parameters are generated */
+ /* Replace these registers when new timing parameters are generated. */
mt9t112_set_pll_dividers(client,
- priv->info->divider.m,
- priv->info->divider.n,
- priv->info->divider.p1,
- priv->info->divider.p2,
- priv->info->divider.p3,
- priv->info->divider.p4,
- priv->info->divider.p5,
- priv->info->divider.p6,
+ priv->info->divider.m, priv->info->divider.n,
+ priv->info->divider.p1, priv->info->divider.p2,
+ priv->info->divider.p3, priv->info->divider.p4,
+ priv->info->divider.p5, priv->info->divider.p6,
priv->info->divider.p7);

/*
@@ -452,20 +431,21 @@ static int mt9t112_init_pll(const struct i2c_client *client)
* I2C Master Clock Divider
*/
mt9t112_reg_write(ret, client, 0x0014, 0x3046);
- mt9t112_reg_write(ret, client, 0x0016, 0x0400); /* JPEG initialization workaround */
+ /* JPEG initialization workaround */
+ mt9t112_reg_write(ret, client, 0x0016, 0x0400);
mt9t112_reg_write(ret, client, 0x0022, 0x0190);
mt9t112_reg_write(ret, client, 0x3B84, 0x0212);

- /* External sensor clock is PLL bypass */
+ /* External sensor clock is PLL bypass. */
mt9t112_reg_write(ret, client, 0x002E, 0x0500);

mt9t112_reg_mask_set(ret, client, 0x0018, 0x0002, 0x0002);
mt9t112_reg_mask_set(ret, client, 0x3B82, 0x0004, 0x0004);

- /* MCU disabled */
+ /* MCU disabled. */
mt9t112_reg_mask_set(ret, client, 0x0018, 0x0004, 0x0004);

- /* out of standby */
+ /* Out of standby. */
mt9t112_reg_mask_set(ret, client, 0x0018, 0x0001, 0);

mdelay(50);
@@ -487,10 +467,10 @@ static int mt9t112_init_pll(const struct i2c_client *client)
mt9t112_reg_write(ret, client, 0x0614, 0x0001);
mdelay(1);

- /* poll to verify out of standby. Must Poll this bit */
+ /* Poll to verify out of standby. Must Poll this bit. */
for (i = 0; i < 100; i++) {
mt9t112_reg_read(data, client, 0x0018);
- if (!(0x4000 & data))
+ if (!(data & 0x4000))
break;

mdelay(10);
@@ -501,7 +481,6 @@ static int mt9t112_init_pll(const struct i2c_client *client)

static int mt9t112_init_setting(const struct i2c_client *client)
{
-
int ret;

/* Adaptive Output Clock (A) */
@@ -562,11 +541,11 @@ static int mt9t112_init_setting(const struct i2c_client *client)
mt9t112_mcu_write(ret, client, VAR(18, 109), 0x0AF0);

/*
- * Flicker Dectection registers
- * This section should be replaced whenever new Timing file is generated
- * All the following registers need to be replaced
+ * Flicker Dectection registers.
+ * This section should be replaced whenever new timing file is
+ * generated. All the following registers need to be replaced.
* Following registers are generated from Register Wizard but user can
- * modify them. For detail see auto flicker detection tuning
+ * modify them. For detail see auto flicker detection tuning.
*/

/* FD_FDPERIOD_SELECT */
@@ -579,47 +558,47 @@ static int mt9t112_init_setting(const struct i2c_client *client)
mt9t112_mcu_write(ret, client, VAR(26, 17), 0x0003);

/*
- * AFD range detection tuning registers
+ * AFD range detection tuning registers.
*/

- /* search_f1_50 */
+ /* Search_f1_50 */
mt9t112_mcu_write(ret, client, VAR8(18, 165), 0x25);

- /* search_f2_50 */
+ /* Search_f2_50 */
mt9t112_mcu_write(ret, client, VAR8(18, 166), 0x28);

- /* search_f1_60 */
+ /* Search_f1_60 */
mt9t112_mcu_write(ret, client, VAR8(18, 167), 0x2C);

- /* search_f2_60 */
+ /* Search_f2_60 */
mt9t112_mcu_write(ret, client, VAR8(18, 168), 0x2F);

- /* period_50Hz (A) */
+ /* Period_50Hz (A) */
mt9t112_mcu_write(ret, client, VAR8(18, 68), 0xBA);

- /* secret register by aptina */
- /* period_50Hz (A MSB) */
+ /* Secret register by Aptina. */
+ /* Period_50Hz (A MSB) */
mt9t112_mcu_write(ret, client, VAR8(18, 303), 0x00);

- /* period_60Hz (A) */
+ /* Period_60Hz (A) */
mt9t112_mcu_write(ret, client, VAR8(18, 69), 0x9B);

- /* secret register by aptina */
- /* period_60Hz (A MSB) */
+ /* Secret register by Aptina. */
+ /* Period_60Hz (A MSB) */
mt9t112_mcu_write(ret, client, VAR8(18, 301), 0x00);

- /* period_50Hz (B) */
+ /* Period_50Hz (B) */
mt9t112_mcu_write(ret, client, VAR8(18, 140), 0x82);

- /* secret register by aptina */
- /* period_50Hz (B) MSB */
+ /* Secret register by Aptina. */
+ /* Period_50Hz (B) MSB */
mt9t112_mcu_write(ret, client, VAR8(18, 304), 0x00);

- /* period_60Hz (B) */
+ /* Period_60Hz (B) */
mt9t112_mcu_write(ret, client, VAR8(18, 141), 0x6D);

- /* secret register by aptina */
- /* period_60Hz (B) MSB */
+ /* Secret register by Aptina. */
+ /* Period_60Hz (B) MSB */
mt9t112_mcu_write(ret, client, VAR8(18, 302), 0x00);

/* FD Mode */
@@ -693,49 +672,50 @@ static int mt9t112_init_camera(const struct i2c_client *client)
int ret;

ECHECKER(ret, mt9t112_reset(client));
-
ECHECKER(ret, mt9t112_init_pll(client));
-
ECHECKER(ret, mt9t112_init_setting(client));
-
ECHECKER(ret, mt9t112_auto_focus_setting(client));

mt9t112_reg_mask_set(ret, client, 0x0018, 0x0004, 0);

- /* Analog setting B */
+ /* Analog setting B.*/
mt9t112_reg_write(ret, client, 0x3084, 0x2409);
mt9t112_reg_write(ret, client, 0x3092, 0x0A49);
mt9t112_reg_write(ret, client, 0x3094, 0x4949);
mt9t112_reg_write(ret, client, 0x3096, 0x4950);

/*
- * Disable adaptive clock
+ * Disable adaptive clock.
* PRI_A_CONFIG_JPEG_OB_TX_CONTROL_VAR
* PRI_B_CONFIG_JPEG_OB_TX_CONTROL_VAR
*/
mt9t112_mcu_write(ret, client, VAR(26, 160), 0x0A2E);
mt9t112_mcu_write(ret, client, VAR(27, 160), 0x0A2E);

- /* Configure STatus in Status_before_length Format and enable header */
- /* PRI_B_CONFIG_JPEG_OB_TX_CONTROL_VAR */
+ /*
+ * Configure Status in Status_before_length Format and enable header.
+ * PRI_B_CONFIG_JPEG_OB_TX_CONTROL_VAR
+ */
mt9t112_mcu_write(ret, client, VAR(27, 144), 0x0CB4);

- /* Enable JPEG in context B */
- /* PRI_B_CONFIG_JPEG_OB_TX_CONTROL_VAR */
+ /*
+ * Enable JPEG in context B.
+ * PRI_B_CONFIG_JPEG_OB_TX_CONTROL_VAR
+ */
mt9t112_mcu_write(ret, client, VAR8(27, 142), 0x01);

- /* Disable Dac_TXLO */
+ /* Disable Dac_TXLO. */
mt9t112_reg_write(ret, client, 0x316C, 0x350F);

- /* Set max slew rates */
+ /* Set max slew rates. */
mt9t112_reg_write(ret, client, 0x1E, 0x777);

return ret;
}

/************************************************************************
- v4l2_subdev_core_ops
-************************************************************************/
+ * v4l2_subdev_core_ops
+ ***********************************************************************/

#ifdef CONFIG_VIDEO_ADV_DEBUG
static int mt9t112_g_register(struct v4l2_subdev *sd,
@@ -764,13 +744,40 @@ static int mt9t112_s_register(struct v4l2_subdev *sd,
}
#endif

+static int mt9t112_power_on(struct mt9t112_priv *priv)
+{
+ int ret;
+
+ ret = clk_prepare_enable(priv->clk);
+ if (ret)
+ return ret;
+
+ if (priv->standby_gpio) {
+ gpiod_set_value(priv->standby_gpio, 0);
+ msleep(100);
+ }
+
+ return 0;
+}
+
+static int mt9t112_power_off(struct mt9t112_priv *priv)
+{
+ clk_disable_unprepare(priv->clk);
+ if (priv->standby_gpio) {
+ gpiod_set_value(priv->standby_gpio, 1);
+ msleep(100);
+ }
+
+ return 0;
+}
+
static int mt9t112_s_power(struct v4l2_subdev *sd, int on)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
- struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
struct mt9t112_priv *priv = to_mt9t112(client);

- return soc_camera_set_power(&client->dev, ssdd, priv->clk, on);
+ return on ? mt9t112_power_on(priv) :
+ mt9t112_power_off(priv);
}

static const struct v4l2_subdev_core_ops mt9t112_subdev_core_ops = {
@@ -781,10 +788,9 @@ static const struct v4l2_subdev_core_ops mt9t112_subdev_core_ops = {
.s_power = mt9t112_s_power,
};

-
/************************************************************************
- v4l2_subdev_video_ops
-************************************************************************/
+ * v4l2_subdev_video_ops
+ **********************************************************************/
static int mt9t112_s_stream(struct v4l2_subdev *sd, int enable)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
@@ -794,8 +800,7 @@ static int mt9t112_s_stream(struct v4l2_subdev *sd, int enable)
if (!enable) {
/* FIXME
*
- * If user selected large output size,
- * and used it long time,
+ * If user selected large output size, and used it long time,
* mt9t112 camera will be very warm.
*
* But current driver can not stop mt9t112 camera.
@@ -805,26 +810,25 @@ static int mt9t112_s_stream(struct v4l2_subdev *sd, int enable)
return ret;
}

- if (!(priv->flags & INIT_DONE)) {
- u16 param = PCLK_RISING & priv->flags ? 0x0001 : 0x0000;
+ if (!priv->init_done) {
+ u16 param = MT9T112_FLAG_PCLK_RISING_EDGE & priv->info->flags ?
+ 0x0001 : 0x0000;

ECHECKER(ret, mt9t112_init_camera(client));

- /* Invert PCLK (Data sampled on falling edge of pixclk) */
+ /* Invert PCLK (Data sampled on falling edge of pixclk). */
mt9t112_reg_write(ret, client, 0x3C20, param);

mdelay(5);

- priv->flags |= INIT_DONE;
+ priv->init_done = true;
}

mt9t112_mcu_write(ret, client, VAR(26, 7), priv->format->fmt);
mt9t112_mcu_write(ret, client, VAR(26, 9), priv->format->order);
mt9t112_mcu_write(ret, client, VAR8(1, 0), 0x06);

- mt9t112_set_a_frame_size(client,
- priv->frame.width,
- priv->frame.height);
+ mt9t112_set_a_frame_size(client, priv->frame.width, priv->frame.height);

ECHECKER(ret, mt9t112_auto_focus_trigger(client));

@@ -854,13 +858,13 @@ static int mt9t112_set_params(struct mt9t112_priv *priv,
if (i == priv->num_formats)
return -EINVAL;

- priv->frame = *rect;
+ priv->frame = *rect;

/*
* frame size check
*/
- mt9t112_frame_check(&priv->frame.width, &priv->frame.height,
- &priv->frame.left, &priv->frame.top);
+ v4l_bound_align_image(&priv->frame.width, 0, MAX_WIDTH, 0,
+ &priv->frame.height, 0, MAX_HEIGHT, 0, 0);

priv->format = mt9t112_cfmts + i;

@@ -868,7 +872,7 @@ static int mt9t112_set_params(struct mt9t112_priv *priv,
}

static int mt9t112_get_selection(struct v4l2_subdev *sd,
- struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_selection *sel)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
@@ -899,8 +903,8 @@ static int mt9t112_get_selection(struct v4l2_subdev *sd,
}

static int mt9t112_set_selection(struct v4l2_subdev *sd,
- struct v4l2_subdev_pad_config *cfg,
- struct v4l2_subdev_selection *sel)
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_selection *sel)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct mt9t112_priv *priv = to_mt9t112(client);
@@ -914,8 +918,8 @@ static int mt9t112_set_selection(struct v4l2_subdev *sd,
}

static int mt9t112_get_fmt(struct v4l2_subdev *sd,
- struct v4l2_subdev_pad_config *cfg,
- struct v4l2_subdev_format *format)
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_format *format)
{
struct v4l2_mbus_framefmt *mf = &format->format;
struct i2c_client *client = v4l2_get_subdevdata(sd);
@@ -955,13 +959,12 @@ static int mt9t112_s_fmt(struct v4l2_subdev *sd,
}

static int mt9t112_set_fmt(struct v4l2_subdev *sd,
- struct v4l2_subdev_pad_config *cfg,
- struct v4l2_subdev_format *format)
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_format *format)
{
- struct v4l2_mbus_framefmt *mf = &format->format;
struct i2c_client *client = v4l2_get_subdevdata(sd);
+ struct v4l2_mbus_framefmt *mf = &format->format;
struct mt9t112_priv *priv = to_mt9t112(client);
- unsigned int top, left;
int i;

if (format->pad)
@@ -975,22 +978,24 @@ static int mt9t112_set_fmt(struct v4l2_subdev *sd,
mf->code = MEDIA_BUS_FMT_UYVY8_2X8;
mf->colorspace = V4L2_COLORSPACE_JPEG;
} else {
- mf->colorspace = mt9t112_cfmts[i].colorspace;
+ mf->colorspace = mt9t112_cfmts[i].colorspace;
}

- mt9t112_frame_check(&mf->width, &mf->height, &left, &top);
+ v4l_bound_align_image(&mf->width, 0, MAX_WIDTH, 0,
+ &mf->height, 0, MAX_HEIGHT, 0, 0);

mf->field = V4L2_FIELD_NONE;

if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE)
return mt9t112_s_fmt(sd, mf);
cfg->try_fmt = *mf;
+
return 0;
}

static int mt9t112_enum_mbus_code(struct v4l2_subdev *sd,
- struct v4l2_subdev_pad_config *cfg,
- struct v4l2_subdev_mbus_code_enum *code)
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_mbus_code_enum *code)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct mt9t112_priv *priv = to_mt9t112(client);
@@ -1003,42 +1008,12 @@ static int mt9t112_enum_mbus_code(struct v4l2_subdev *sd,
return 0;
}

-static int mt9t112_g_mbus_config(struct v4l2_subdev *sd,
- struct v4l2_mbus_config *cfg)
-{
- struct i2c_client *client = v4l2_get_subdevdata(sd);
- struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
-
- cfg->flags = V4L2_MBUS_MASTER | V4L2_MBUS_VSYNC_ACTIVE_HIGH |
- V4L2_MBUS_HSYNC_ACTIVE_HIGH | V4L2_MBUS_DATA_ACTIVE_HIGH |
- V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_PCLK_SAMPLE_FALLING;
- cfg->type = V4L2_MBUS_PARALLEL;
- cfg->flags = soc_camera_apply_board_flags(ssdd, cfg);
-
- return 0;
-}
-
-static int mt9t112_s_mbus_config(struct v4l2_subdev *sd,
- const struct v4l2_mbus_config *cfg)
-{
- struct i2c_client *client = v4l2_get_subdevdata(sd);
- struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
- struct mt9t112_priv *priv = to_mt9t112(client);
-
- if (soc_camera_apply_board_flags(ssdd, cfg) & V4L2_MBUS_PCLK_SAMPLE_RISING)
- priv->flags |= PCLK_RISING;
-
- return 0;
-}
-
static const struct v4l2_subdev_video_ops mt9t112_subdev_video_ops = {
.s_stream = mt9t112_s_stream,
- .g_mbus_config = mt9t112_g_mbus_config,
- .s_mbus_config = mt9t112_s_mbus_config,
};

static const struct v4l2_subdev_pad_ops mt9t112_subdev_pad_ops = {
- .enum_mbus_code = mt9t112_enum_mbus_code,
+ .enum_mbus_code = mt9t112_enum_mbus_code,
.get_selection = mt9t112_get_selection,
.set_selection = mt9t112_set_selection,
.get_fmt = mt9t112_get_fmt,
@@ -1046,8 +1021,8 @@ static const struct v4l2_subdev_pad_ops mt9t112_subdev_pad_ops = {
};

/************************************************************************
- i2c driver
-************************************************************************/
+ * i2c driver
+ ***********************************************************************/
static const struct v4l2_subdev_ops mt9t112_subdev_ops = {
.core = &mt9t112_subdev_core_ops,
.video = &mt9t112_subdev_video_ops,
@@ -1065,9 +1040,7 @@ static int mt9t112_camera_probe(struct i2c_client *client)
if (ret < 0)
return ret;

- /*
- * check and show chip ID
- */
+ /* Check and show chip ID. */
mt9t112_reg_read(chipid, client, 0x0000);

switch (chipid) {
@@ -1089,6 +1062,7 @@ static int mt9t112_camera_probe(struct i2c_client *client)

done:
mt9t112_s_power(&priv->subdev, 0);
+
return ret;
}

@@ -1096,16 +1070,9 @@ static int mt9t112_probe(struct i2c_client *client,
const struct i2c_device_id *did)
{
struct mt9t112_priv *priv;
- struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
- struct v4l2_rect rect = {
- .width = VGA_WIDTH,
- .height = VGA_HEIGHT,
- .left = (MAX_WIDTH - VGA_WIDTH) / 2,
- .top = (MAX_HEIGHT - VGA_HEIGHT) / 2,
- };
int ret;

- if (!ssdd || !ssdd->drv_priv) {
+ if (!client->dev.platform_data) {
dev_err(&client->dev, "mt9t112: missing platform data!\n");
return -EINVAL;
}
@@ -1114,30 +1081,40 @@ static int mt9t112_probe(struct i2c_client *client,
if (!priv)
return -ENOMEM;

- priv->info = ssdd->drv_priv;
+ priv->info = client->dev.platform_data;
+ priv->init_done = false;

v4l2_i2c_subdev_init(&priv->subdev, client, &mt9t112_subdev_ops);

- priv->clk = v4l2_clk_get(&client->dev, "mclk");
- if (IS_ERR(priv->clk))
+ priv->clk = devm_clk_get(&client->dev, "extclk");
+ if (PTR_ERR(priv->clk) == -ENOENT) {
+ priv->clk = NULL;
+ } else if (IS_ERR(priv->clk)) {
+ dev_err(&client->dev, "Unable to get clock \"extclk\"\n");
return PTR_ERR(priv->clk);
+ }

- ret = mt9t112_camera_probe(client);
+ priv->standby_gpio = devm_gpiod_get_optional(&client->dev, "standby",
+ GPIOD_OUT_HIGH);
+ if (IS_ERR(priv->standby_gpio)) {
+ dev_err(&client->dev, "Unable to get gpio \"standby\"\n");
+ return PTR_ERR(priv->standby_gpio);
+ }

- /* Cannot fail: using the default supported pixel code */
- if (!ret)
- mt9t112_set_params(priv, &rect, MEDIA_BUS_FMT_UYVY8_2X8);
- else
- v4l2_clk_put(priv->clk);
+ ret = mt9t112_camera_probe(client);
+ if (ret)
+ return ret;

- return ret;
+ return v4l2_async_register_subdev(&priv->subdev);
}

static int mt9t112_remove(struct i2c_client *client)
{
struct mt9t112_priv *priv = to_mt9t112(client);

- v4l2_clk_put(priv->clk);
+ clk_disable_unprepare(priv->clk);
+ v4l2_async_unregister_subdev(&priv->subdev);
+
return 0;
}

@@ -1158,6 +1135,6 @@ static struct i2c_driver mt9t112_i2c_driver = {

module_i2c_driver(mt9t112_i2c_driver);

-MODULE_DESCRIPTION("SoC Camera driver for mt9t112");
+MODULE_DESCRIPTION("V4L2 driver for MT9T111/MT9T112 camera sensor");
MODULE_AUTHOR("Kuninori Morimoto");
MODULE_LICENSE("GPL v2");
diff --git a/drivers/media/i2c/soc_camera/mt9t112.c b/drivers/media/i2c/soc_camera/mt9t112.c
index 297d22e..b53c36d 100644
--- a/drivers/media/i2c/soc_camera/mt9t112.c
+++ b/drivers/media/i2c/soc_camera/mt9t112.c
@@ -85,7 +85,7 @@ struct mt9t112_format {

struct mt9t112_priv {
struct v4l2_subdev subdev;
- struct mt9t112_camera_info *info;
+ struct mt9t112_platform_data *info;
struct i2c_client *client;
struct v4l2_rect frame;
struct v4l2_clk *clk;
diff --git a/include/media/i2c/mt9t112.h b/include/media/i2c/mt9t112.h
index a43c74a..cc80d5c 100644
--- a/include/media/i2c/mt9t112.h
+++ b/include/media/i2c/mt9t112.h
@@ -1,28 +1,25 @@
+/* SPDX-License-Identifier: GPL-2.0 */
/* mt9t112 Camera
*
* Copyright (C) 2009 Renesas Solutions Corp.
* Kuninori Morimoto <morimoto.kuninori@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.
*/

#ifndef __MT9T112_H__
#define __MT9T112_H__

-#define MT9T112_FLAG_PCLK_RISING_EDGE (1 << 0)
-#define MT9T112_FLAG_DATAWIDTH_8 (1 << 1) /* default width is 10 */
-
struct mt9t112_pll_divider {
u8 m, n;
u8 p1, p2, p3, p4, p5, p6, p7;
};

-/*
- * mt9t112 camera info
+/**
+ * mt9t112_platform_data - mt9t112 driver interface
+ * @flags: Sensor media bus configuration.
+ * @divider: Sensor PLL configuration
*/
-struct mt9t112_camera_info {
+struct mt9t112_platform_data {
+#define MT9T112_FLAG_PCLK_RISING_EDGE BIT(0)
u32 flags;
struct mt9t112_pll_divider divider;
};
--
2.7.4