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linux/drivers/media/i2c/mt9t112.c
Sakari Ailus 72c8cb48a4 media: mt9t112: Don't set format in sub-device state 
For the purpose of setting old non-pad based sub-device try format as a
basis for VIDIOC_TRY_FMT implementation, there is no need to set the
format in the sub-device state. Drop the assignment to the state, which
would result in a NULL pointer dereference.

Fixes: fd17e3a9a7 ("media: i2c: Use accessors for pad config 'try_*' fields")
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
2023-12-08 10:04:12 +01:00

1131 lines
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// SPDX-License-Identifier: GPL-2.0
/*
* mt9t112 Camera Driver
*
* Copyright (C) 2018 Jacopo Mondi <jacopo+renesas@jmondi.org>
*
* Copyright (C) 2009 Renesas Solutions Corp.
* Kuninori Morimoto <morimoto.kuninori@renesas.com>
*
* Based on ov772x driver, mt9m111 driver,
*
* Copyright (C) 2008 Kuninori Morimoto <morimoto.kuninori@renesas.com>
* Copyright (C) 2008, Robert Jarzmik <robert.jarzmik@free.fr>
* Copyright 2006-7 Jonathan Corbet <corbet@lwn.net>
* Copyright (C) 2008 Magnus Damm
* Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
*
* 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>
#include <linux/slab.h>
#include <linux/v4l2-mediabus.h>
#include <linux/videodev2.h>
#include <media/i2c/mt9t112.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
***********************************************************************/
/*
* frame size
*/
#define MAX_WIDTH 2048
#define MAX_HEIGHT 1536
/*
* macro of read/write
*/
#define ECHECKER(ret, x) \
do { \
(ret) = (x); \
if ((ret) < 0) \
return (ret); \
} while (0)
#define mt9t112_reg_write(ret, client, a, b) \
ECHECKER(ret, __mt9t112_reg_write(client, a, b))
#define mt9t112_mcu_write(ret, client, a, b) \
ECHECKER(ret, __mt9t112_mcu_write(client, a, b))
#define mt9t112_reg_mask_set(ret, client, a, b, c) \
ECHECKER(ret, __mt9t112_reg_mask_set(client, a, b, c))
#define mt9t112_mcu_mask_set(ret, client, a, b, c) \
ECHECKER(ret, __mt9t112_mcu_mask_set(client, a, b, c))
#define mt9t112_reg_read(ret, client, a) \
ECHECKER(ret, __mt9t112_reg_read(client, a))
/*
* Logical address
*/
#define _VAR(id, offset, base) (base | (id & 0x1f) << 10 | (offset & 0x3ff))
#define VAR(id, offset) _VAR(id, offset, 0x0000)
#define VAR8(id, offset) _VAR(id, offset, 0x8000)
/************************************************************************
* struct
***********************************************************************/
struct mt9t112_format {
u32 code;
enum v4l2_colorspace colorspace;
u16 fmt;
u16 order;
};
struct mt9t112_priv {
struct v4l2_subdev subdev;
struct mt9t112_platform_data *info;
struct i2c_client *client;
struct v4l2_rect frame;
struct clk *clk;
struct gpio_desc *standby_gpio;
const struct mt9t112_format *format;
int num_formats;
bool init_done;
};
/************************************************************************
* supported format
***********************************************************************/
static const struct mt9t112_format mt9t112_cfmts[] = {
{
.code = MEDIA_BUS_FMT_UYVY8_2X8,
.colorspace = V4L2_COLORSPACE_SRGB,
.fmt = 1,
.order = 0,
}, {
.code = MEDIA_BUS_FMT_VYUY8_2X8,
.colorspace = V4L2_COLORSPACE_SRGB,
.fmt = 1,
.order = 1,
}, {
.code = MEDIA_BUS_FMT_YUYV8_2X8,
.colorspace = V4L2_COLORSPACE_SRGB,
.fmt = 1,
.order = 2,
}, {
.code = MEDIA_BUS_FMT_YVYU8_2X8,
.colorspace = V4L2_COLORSPACE_SRGB,
.fmt = 1,
.order = 3,
}, {
.code = MEDIA_BUS_FMT_RGB555_2X8_PADHI_LE,
.colorspace = V4L2_COLORSPACE_SRGB,
.fmt = 8,
.order = 2,
}, {
.code = MEDIA_BUS_FMT_RGB565_2X8_LE,
.colorspace = V4L2_COLORSPACE_SRGB,
.fmt = 4,
.order = 2,
},
};
/************************************************************************
* general function
***********************************************************************/
static struct mt9t112_priv *to_mt9t112(const struct i2c_client *client)
{
return container_of(i2c_get_clientdata(client),
struct mt9t112_priv,
subdev);
}
static int __mt9t112_reg_read(const struct i2c_client *client, u16 command)
{
struct i2c_msg msg[2];
u8 buf[2];
int ret;
command = swab16(command);
msg[0].addr = client->addr;
msg[0].flags = 0;
msg[0].len = 2;
msg[0].buf = (u8 *)&command;
msg[1].addr = client->addr;
msg[1].flags = I2C_M_RD;
msg[1].len = 2;
msg[1].buf = buf;
/*
* 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);
}
static int __mt9t112_reg_write(const struct i2c_client *client,
u16 command, u16 data)
{
struct i2c_msg msg;
u8 buf[4];
int ret;
command = swab16(command);
data = swab16(data);
memcpy(buf + 0, &command, 2);
memcpy(buf + 2, &data, 2);
msg.addr = client->addr;
msg.flags = 0;
msg.len = 4;
msg.buf = buf;
/*
* i2c_transfer return message length, but this function should
* return 0 if correct case.
*/
ret = i2c_transfer(client->adapter, &msg, 1);
return ret >= 0 ? 0 : ret;
}
static int __mt9t112_reg_mask_set(const struct i2c_client *client,
u16 command, u16 mask, u16 set)
{
int val = __mt9t112_reg_read(client, command);
if (val < 0)
return val;
val &= ~mask;
val |= set & mask;
return __mt9t112_reg_write(client, command, val);
}
/* mcu access */
static int __mt9t112_mcu_read(const struct i2c_client *client, u16 command)
{
int ret;
ret = __mt9t112_reg_write(client, 0x098E, command);
if (ret < 0)
return ret;
return __mt9t112_reg_read(client, 0x0990);
}
static int __mt9t112_mcu_write(const struct i2c_client *client,
u16 command, u16 data)
{
int ret;
ret = __mt9t112_reg_write(client, 0x098E, command);
if (ret < 0)
return ret;
return __mt9t112_reg_write(client, 0x0990, data);
}
static int __mt9t112_mcu_mask_set(const struct i2c_client *client,
u16 command, u16 mask, u16 set)
{
int val = __mt9t112_mcu_read(client, command);
if (val < 0)
return val;
val &= ~mask;
val |= set & mask;
return __mt9t112_mcu_write(client, command, val);
}
static int mt9t112_reset(const struct i2c_client *client)
{
int ret;
mt9t112_reg_mask_set(ret, client, 0x001a, 0x0001, 0x0001);
usleep_range(1000, 5000);
mt9t112_reg_mask_set(ret, client, 0x001a, 0x0001, 0x0000);
return ret;
}
#ifndef EXT_CLOCK
#define CLOCK_INFO(a, b)
#else
#define CLOCK_INFO(a, b) mt9t112_clock_info(a, b)
static int mt9t112_clock_info(const struct i2c_client *client, u32 ext)
{
int m, n, p1, p2, p3, p4, p5, p6, p7;
u32 vco, clk;
char *enable;
ext /= 1000; /* kbyte order */
mt9t112_reg_read(n, client, 0x0012);
p1 = n & 0x000f;
n = n >> 4;
p2 = n & 0x000f;
n = n >> 4;
p3 = n & 0x000f;
mt9t112_reg_read(n, client, 0x002a);
p4 = n & 0x000f;
n = n >> 4;
p5 = n & 0x000f;
n = n >> 4;
p6 = n & 0x000f;
mt9t112_reg_read(n, client, 0x002c);
p7 = n & 0x000f;
mt9t112_reg_read(n, client, 0x0010);
m = n & 0x00ff;
n = (n >> 8) & 0x003f;
enable = ((ext < 6000) || (ext > 54000)) ? "X" : "";
dev_dbg(&client->dev, "EXTCLK : %10u K %s\n", ext, enable);
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 = (clk > 96000) ? "X" : "";
dev_dbg(&client->dev, "PIXCLK : %10u K %s\n", clk, enable);
clk = vco / (p3 + 1);
enable = (clk > 768000) ? "X" : "";
dev_dbg(&client->dev, "MIPICLK : %10u K %s\n", clk, enable);
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 = (clk > 54000) ? "X" : "";
dev_dbg(&client->dev, "SOC CLK : %10u K %s\n", clk, enable);
clk = vco / (p4 + 1);
enable = (clk > 70000) ? "X" : "";
dev_dbg(&client->dev, "Sensor CLK : %10u K %s\n", clk, enable);
clk = vco / (p7 + 1);
dev_dbg(&client->dev, "External sensor : %10u K\n", clk);
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 int mt9t112_set_a_frame_size(const struct i2c_client *client,
u16 width, u16 height)
{
int ret;
u16 wstart = (MAX_WIDTH - width) / 2;
u16 hstart = (MAX_HEIGHT - height) / 2;
/* (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. */
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. */
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. */
mt9t112_mcu_write(ret, client, VAR(18, 6), 11 + height + hstart);
mt9t112_mcu_write(ret, client, VAR(18, 8), 11 + width + wstart);
mt9t112_mcu_write(ret, client, VAR8(1, 0), 0x06);
return ret;
}
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)
{
int ret;
u16 val;
/* N/M */
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);
mt9t112_reg_mask_set(ret, client, 0x0012, 0x0fff, val);
/* P4/P5/P6 */
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);
mt9t112_reg_mask_set(ret, client, 0x002C, 0x100f, val);
return ret;
}
static int mt9t112_init_pll(const struct i2c_client *client)
{
struct mt9t112_priv *priv = to_mt9t112(client);
int data, i, ret;
mt9t112_reg_mask_set(ret, client, 0x0014, 0x003, 0x0001);
/* PLL control: BYPASS PLL = 8517. */
mt9t112_reg_write(ret, client, 0x0014, 0x2145);
/* 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.p7);
/*
* TEST_BYPASS on
* PLL_ENABLE on
* SEL_LOCK_DET on
* TEST_BYPASS off
*/
mt9t112_reg_write(ret, client, 0x0014, 0x2525);
mt9t112_reg_write(ret, client, 0x0014, 0x2527);
mt9t112_reg_write(ret, client, 0x0014, 0x3427);
mt9t112_reg_write(ret, client, 0x0014, 0x3027);
mdelay(10);
/*
* PLL_BYPASS off
* Reference clock count
* I2C Master Clock Divider
*/
mt9t112_reg_write(ret, client, 0x0014, 0x3046);
/* 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. */
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. */
mt9t112_reg_mask_set(ret, client, 0x0018, 0x0004, 0x0004);
/* Out of standby. */
mt9t112_reg_mask_set(ret, client, 0x0018, 0x0001, 0);
mdelay(50);
/*
* Standby Workaround
* Disable Secondary I2C Pads
*/
mt9t112_reg_write(ret, client, 0x0614, 0x0001);
mdelay(1);
mt9t112_reg_write(ret, client, 0x0614, 0x0001);
mdelay(1);
mt9t112_reg_write(ret, client, 0x0614, 0x0001);
mdelay(1);
mt9t112_reg_write(ret, client, 0x0614, 0x0001);
mdelay(1);
mt9t112_reg_write(ret, client, 0x0614, 0x0001);
mdelay(1);
mt9t112_reg_write(ret, client, 0x0614, 0x0001);
mdelay(1);
/* Poll to verify out of standby. Must Poll this bit. */
for (i = 0; i < 100; i++) {
mt9t112_reg_read(data, client, 0x0018);
if (!(data & 0x4000))
break;
mdelay(10);
}
return ret;
}
static int mt9t112_init_setting(const struct i2c_client *client)
{
int ret;
/* Adaptive Output Clock (A) */
mt9t112_mcu_mask_set(ret, client, VAR(26, 160), 0x0040, 0x0000);
/* Read Mode (A) */
mt9t112_mcu_write(ret, client, VAR(18, 12), 0x0024);
/* Fine Correction (A) */
mt9t112_mcu_write(ret, client, VAR(18, 15), 0x00CC);
/* Fine IT Min (A) */
mt9t112_mcu_write(ret, client, VAR(18, 17), 0x01f1);
/* Fine IT Max Margin (A) */
mt9t112_mcu_write(ret, client, VAR(18, 19), 0x00fF);
/* Base Frame Lines (A) */
mt9t112_mcu_write(ret, client, VAR(18, 29), 0x032D);
/* Min Line Length (A) */
mt9t112_mcu_write(ret, client, VAR(18, 31), 0x073a);
/* Line Length (A) */
mt9t112_mcu_write(ret, client, VAR(18, 37), 0x07d0);
/* Adaptive Output Clock (B) */
mt9t112_mcu_mask_set(ret, client, VAR(27, 160), 0x0040, 0x0000);
/* Row Start (B) */
mt9t112_mcu_write(ret, client, VAR(18, 74), 0x004);
/* Column Start (B) */
mt9t112_mcu_write(ret, client, VAR(18, 76), 0x004);
/* Row End (B) */
mt9t112_mcu_write(ret, client, VAR(18, 78), 0x60B);
/* Column End (B) */
mt9t112_mcu_write(ret, client, VAR(18, 80), 0x80B);
/* Fine Correction (B) */
mt9t112_mcu_write(ret, client, VAR(18, 87), 0x008C);
/* Fine IT Min (B) */
mt9t112_mcu_write(ret, client, VAR(18, 89), 0x01F1);
/* Fine IT Max Margin (B) */
mt9t112_mcu_write(ret, client, VAR(18, 91), 0x00FF);
/* Base Frame Lines (B) */
mt9t112_mcu_write(ret, client, VAR(18, 101), 0x0668);
/* Min Line Length (B) */
mt9t112_mcu_write(ret, client, VAR(18, 103), 0x0AF0);
/* Line Length (B) */
mt9t112_mcu_write(ret, client, VAR(18, 109), 0x0AF0);
/*
* Flicker Detection 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.
*/
/* FD_FDPERIOD_SELECT */
mt9t112_mcu_write(ret, client, VAR8(8, 5), 0x01);
/* PRI_B_CONFIG_FD_ALGO_RUN */
mt9t112_mcu_write(ret, client, VAR(27, 17), 0x0003);
/* PRI_A_CONFIG_FD_ALGO_RUN */
mt9t112_mcu_write(ret, client, VAR(26, 17), 0x0003);
/*
* AFD range detection tuning registers.
*/
/* Search_f1_50 */
mt9t112_mcu_write(ret, client, VAR8(18, 165), 0x25);
/* Search_f2_50 */
mt9t112_mcu_write(ret, client, VAR8(18, 166), 0x28);
/* Search_f1_60 */
mt9t112_mcu_write(ret, client, VAR8(18, 167), 0x2C);
/* Search_f2_60 */
mt9t112_mcu_write(ret, client, VAR8(18, 168), 0x2F);
/* Period_50Hz (A) */
mt9t112_mcu_write(ret, client, VAR8(18, 68), 0xBA);
/* Secret register by Aptina. */
/* Period_50Hz (A MSB) */
mt9t112_mcu_write(ret, client, VAR8(18, 303), 0x00);
/* Period_60Hz (A) */
mt9t112_mcu_write(ret, client, VAR8(18, 69), 0x9B);
/* Secret register by Aptina. */
/* Period_60Hz (A MSB) */
mt9t112_mcu_write(ret, client, VAR8(18, 301), 0x00);
/* Period_50Hz (B) */
mt9t112_mcu_write(ret, client, VAR8(18, 140), 0x82);
/* Secret register by Aptina. */
/* Period_50Hz (B) MSB */
mt9t112_mcu_write(ret, client, VAR8(18, 304), 0x00);
/* Period_60Hz (B) */
mt9t112_mcu_write(ret, client, VAR8(18, 141), 0x6D);
/* Secret register by Aptina. */
/* Period_60Hz (B) MSB */
mt9t112_mcu_write(ret, client, VAR8(18, 302), 0x00);
/* FD Mode */
mt9t112_mcu_write(ret, client, VAR8(8, 2), 0x10);
/* Stat_min */
mt9t112_mcu_write(ret, client, VAR8(8, 9), 0x02);
/* Stat_max */
mt9t112_mcu_write(ret, client, VAR8(8, 10), 0x03);
/* Min_amplitude */
mt9t112_mcu_write(ret, client, VAR8(8, 12), 0x0A);
/* RX FIFO Watermark (A) */
mt9t112_mcu_write(ret, client, VAR(18, 70), 0x0014);
/* RX FIFO Watermark (B) */
mt9t112_mcu_write(ret, client, VAR(18, 142), 0x0014);
/* MCLK: 16MHz
* PCLK: 73MHz
* CorePixCLK: 36.5 MHz
*/
mt9t112_mcu_write(ret, client, VAR8(18, 0x0044), 133);
mt9t112_mcu_write(ret, client, VAR8(18, 0x0045), 110);
mt9t112_mcu_write(ret, client, VAR8(18, 0x008c), 130);
mt9t112_mcu_write(ret, client, VAR8(18, 0x008d), 108);
mt9t112_mcu_write(ret, client, VAR8(18, 0x00A5), 27);
mt9t112_mcu_write(ret, client, VAR8(18, 0x00a6), 30);
mt9t112_mcu_write(ret, client, VAR8(18, 0x00a7), 32);
mt9t112_mcu_write(ret, client, VAR8(18, 0x00a8), 35);
return ret;
}
static int mt9t112_auto_focus_setting(const struct i2c_client *client)
{
int ret;
mt9t112_mcu_write(ret, client, VAR(12, 13), 0x000F);
mt9t112_mcu_write(ret, client, VAR(12, 23), 0x0F0F);
mt9t112_mcu_write(ret, client, VAR8(1, 0), 0x06);
mt9t112_reg_write(ret, client, 0x0614, 0x0000);
mt9t112_mcu_write(ret, client, VAR8(1, 0), 0x05);
mt9t112_mcu_write(ret, client, VAR8(12, 2), 0x02);
mt9t112_mcu_write(ret, client, VAR(12, 3), 0x0002);
mt9t112_mcu_write(ret, client, VAR(17, 3), 0x8001);
mt9t112_mcu_write(ret, client, VAR(17, 11), 0x0025);
mt9t112_mcu_write(ret, client, VAR(17, 13), 0x0193);
mt9t112_mcu_write(ret, client, VAR8(17, 33), 0x18);
mt9t112_mcu_write(ret, client, VAR8(1, 0), 0x05);
return ret;
}
static int mt9t112_auto_focus_trigger(const struct i2c_client *client)
{
int ret;
mt9t112_mcu_write(ret, client, VAR8(12, 25), 0x01);
return ret;
}
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.*/
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.
* 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
*/
mt9t112_mcu_write(ret, client, VAR(27, 144), 0x0CB4);
/*
* 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. */
mt9t112_reg_write(ret, client, 0x316C, 0x350F);
/* Set max slew rates. */
mt9t112_reg_write(ret, client, 0x1E, 0x777);
return ret;
}
/************************************************************************
* v4l2_subdev_core_ops
***********************************************************************/
#ifdef CONFIG_VIDEO_ADV_DEBUG
static int mt9t112_g_register(struct v4l2_subdev *sd,
struct v4l2_dbg_register *reg)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
int ret;
reg->size = 2;
mt9t112_reg_read(ret, client, reg->reg);
reg->val = (__u64)ret;
return 0;
}
static int mt9t112_s_register(struct v4l2_subdev *sd,
const struct v4l2_dbg_register *reg)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
int ret;
mt9t112_reg_write(ret, client, reg->reg, reg->val);
return ret;
}
#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 mt9t112_priv *priv = to_mt9t112(client);
return on ? mt9t112_power_on(priv) :
mt9t112_power_off(priv);
}
static const struct v4l2_subdev_core_ops mt9t112_subdev_core_ops = {
#ifdef CONFIG_VIDEO_ADV_DEBUG
.g_register = mt9t112_g_register,
.s_register = mt9t112_s_register,
#endif
.s_power = mt9t112_s_power,
};
/************************************************************************
* v4l2_subdev_video_ops
**********************************************************************/
static int mt9t112_s_stream(struct v4l2_subdev *sd, int enable)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct mt9t112_priv *priv = to_mt9t112(client);
int ret = 0;
if (!enable) {
/* FIXME
*
* 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.
* So, set small size here to solve this problem.
*/
mt9t112_set_a_frame_size(client, VGA_WIDTH, VGA_HEIGHT);
return ret;
}
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). */
mt9t112_reg_write(ret, client, 0x3C20, param);
mdelay(5);
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);
ECHECKER(ret, mt9t112_auto_focus_trigger(client));
dev_dbg(&client->dev, "format : %d\n", priv->format->code);
dev_dbg(&client->dev, "size : %d x %d\n",
priv->frame.width,
priv->frame.height);
CLOCK_INFO(client, EXT_CLOCK);
return ret;
}
static int mt9t112_set_params(struct mt9t112_priv *priv,
const struct v4l2_rect *rect,
u32 code)
{
int i;
/*
* get color format
*/
for (i = 0; i < priv->num_formats; i++)
if (mt9t112_cfmts[i].code == code)
break;
if (i == priv->num_formats)
return -EINVAL;
priv->frame = *rect;
/*
* frame size check
*/
v4l_bound_align_image(&priv->frame.width, 0, MAX_WIDTH, 0,
&priv->frame.height, 0, MAX_HEIGHT, 0, 0);
priv->format = mt9t112_cfmts + i;
return 0;
}
static int mt9t112_get_selection(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_selection *sel)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct mt9t112_priv *priv = to_mt9t112(client);
if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)
return -EINVAL;
switch (sel->target) {
case V4L2_SEL_TGT_CROP_BOUNDS:
sel->r.left = 0;
sel->r.top = 0;
sel->r.width = MAX_WIDTH;
sel->r.height = MAX_HEIGHT;
return 0;
case V4L2_SEL_TGT_CROP:
sel->r = priv->frame;
return 0;
default:
return -EINVAL;
}
}
static int mt9t112_set_selection(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_selection *sel)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct mt9t112_priv *priv = to_mt9t112(client);
const struct v4l2_rect *rect = &sel->r;
if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE ||
sel->target != V4L2_SEL_TGT_CROP)
return -EINVAL;
return mt9t112_set_params(priv, rect, priv->format->code);
}
static int mt9t112_get_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_format *format)
{
struct v4l2_mbus_framefmt *mf = &format->format;
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct mt9t112_priv *priv = to_mt9t112(client);
if (format->pad)
return -EINVAL;
mf->width = priv->frame.width;
mf->height = priv->frame.height;
mf->colorspace = priv->format->colorspace;
mf->code = priv->format->code;
mf->field = V4L2_FIELD_NONE;
return 0;
}
static int mt9t112_s_fmt(struct v4l2_subdev *sd,
struct v4l2_mbus_framefmt *mf)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct mt9t112_priv *priv = to_mt9t112(client);
struct v4l2_rect rect = {
.width = mf->width,
.height = mf->height,
.left = priv->frame.left,
.top = priv->frame.top,
};
int ret;
ret = mt9t112_set_params(priv, &rect, mf->code);
if (!ret)
mf->colorspace = priv->format->colorspace;
return ret;
}
static int mt9t112_set_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_format *format)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct v4l2_mbus_framefmt *mf = &format->format;
struct mt9t112_priv *priv = to_mt9t112(client);
int i;
if (format->pad)
return -EINVAL;
for (i = 0; i < priv->num_formats; i++)
if (mt9t112_cfmts[i].code == mf->code)
break;
if (i == priv->num_formats) {
mf->code = MEDIA_BUS_FMT_UYVY8_2X8;
mf->colorspace = V4L2_COLORSPACE_JPEG;
} else {
mf->colorspace = mt9t112_cfmts[i].colorspace;
}
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);
return 0;
}
static int mt9t112_enum_mbus_code(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_mbus_code_enum *code)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct mt9t112_priv *priv = to_mt9t112(client);
if (code->pad || code->index >= priv->num_formats)
return -EINVAL;
code->code = mt9t112_cfmts[code->index].code;
return 0;
}
static const struct v4l2_subdev_video_ops mt9t112_subdev_video_ops = {
.s_stream = mt9t112_s_stream,
};
static const struct v4l2_subdev_pad_ops mt9t112_subdev_pad_ops = {
.enum_mbus_code = mt9t112_enum_mbus_code,
.get_selection = mt9t112_get_selection,
.set_selection = mt9t112_set_selection,
.get_fmt = mt9t112_get_fmt,
.set_fmt = mt9t112_set_fmt,
};
/************************************************************************
* i2c driver
***********************************************************************/
static const struct v4l2_subdev_ops mt9t112_subdev_ops = {
.core = &mt9t112_subdev_core_ops,
.video = &mt9t112_subdev_video_ops,
.pad = &mt9t112_subdev_pad_ops,
};
static int mt9t112_camera_probe(struct i2c_client *client)
{
struct mt9t112_priv *priv = to_mt9t112(client);
const char *devname;
int chipid;
int ret;
ret = mt9t112_s_power(&priv->subdev, 1);
if (ret < 0)
return ret;
/* Check and show chip ID. */
mt9t112_reg_read(chipid, client, 0x0000);
switch (chipid) {
case 0x2680:
devname = "mt9t111";
priv->num_formats = 1;
break;
case 0x2682:
devname = "mt9t112";
priv->num_formats = ARRAY_SIZE(mt9t112_cfmts);
break;
default:
dev_err(&client->dev, "Product ID error %04x\n", chipid);
ret = -ENODEV;
goto done;
}
dev_info(&client->dev, "%s chip ID %04x\n", devname, chipid);
done:
mt9t112_s_power(&priv->subdev, 0);
return ret;
}
static int mt9t112_probe(struct i2c_client *client)
{
struct mt9t112_priv *priv;
int ret;
if (!client->dev.platform_data) {
dev_err(&client->dev, "mt9t112: missing platform data!\n");
return -EINVAL;
}
priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
priv->info = client->dev.platform_data;
priv->init_done = false;
v4l2_i2c_subdev_init(&priv->subdev, client, &mt9t112_subdev_ops);
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);
}
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);
}
ret = mt9t112_camera_probe(client);
if (ret)
return ret;
return v4l2_async_register_subdev(&priv->subdev);
}
static void mt9t112_remove(struct i2c_client *client)
{
struct mt9t112_priv *priv = to_mt9t112(client);
clk_disable_unprepare(priv->clk);
v4l2_async_unregister_subdev(&priv->subdev);
}
static const struct i2c_device_id mt9t112_id[] = {
{ "mt9t112", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, mt9t112_id);
static struct i2c_driver mt9t112_i2c_driver = {
.driver = {
.name = "mt9t112",
},
.probe = mt9t112_probe,
.remove = mt9t112_remove,
.id_table = mt9t112_id,
};
module_i2c_driver(mt9t112_i2c_driver);
MODULE_DESCRIPTION("V4L2 driver for MT9T111/MT9T112 camera sensor");
MODULE_AUTHOR("Kuninori Morimoto");
MODULE_LICENSE("GPL v2");
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