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linux/drivers/media/video/mt9t112.c
Dan Carpenter e469183541 [media] V4L: mt9t112: use after free in mt9t112_probe() 
priv gets dereferenced in mt9t112_set_params() so we should return
before calling that.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-11-24 10:27:47 -02:00

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/*
* mt9t112 Camera Driver
*
* 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>
*
* 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/delay.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/mt9t112.h>
#include <media/soc_camera.h>
#include <media/v4l2-chip-ident.h>
#include <media/v4l2-common.h>
/* you can check PLL/clock info */
/* #define EXT_CLOCK 24000000 */
/************************************************************************
macro
************************************************************************/
/*
* frame size
*/
#define MAX_WIDTH 2048
#define MAX_HEIGHT 1536
#define VGA_WIDTH 640
#define VGA_HEIGHT 480
/*
* 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 {
enum v4l2_mbus_pixelcode code;
enum v4l2_colorspace colorspace;
u16 fmt;
u16 order;
};
struct mt9t112_priv {
struct v4l2_subdev subdev;
struct mt9t112_camera_info *info;
struct i2c_client *client;
struct v4l2_rect frame;
const struct mt9t112_format *format;
int model;
u32 flags;
/* for flags */
#define INIT_DONE (1 << 0)
#define PCLK_RISING (1 << 1)
};
/************************************************************************
supported format
************************************************************************/
static const struct mt9t112_format mt9t112_cfmts[] = {
{
.code = V4L2_MBUS_FMT_UYVY8_2X8,
.colorspace = V4L2_COLORSPACE_JPEG,
.fmt = 1,
.order = 0,
}, {
.code = V4L2_MBUS_FMT_VYUY8_2X8,
.colorspace = V4L2_COLORSPACE_JPEG,
.fmt = 1,
.order = 1,
}, {
.code = V4L2_MBUS_FMT_YUYV8_2X8,
.colorspace = V4L2_COLORSPACE_JPEG,
.fmt = 1,
.order = 2,
}, {
.code = V4L2_MBUS_FMT_YVYU8_2X8,
.colorspace = V4L2_COLORSPACE_JPEG,
.fmt = 1,
.order = 3,
}, {
.code = V4L2_MBUS_FMT_RGB555_2X8_PADHI_LE,
.colorspace = V4L2_COLORSPACE_SRGB,
.fmt = 8,
.order = 2,
}, {
.code = V4L2_MBUS_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 mean error.
* else, under 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);
if (ret >= 0)
ret = 0;
return 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);
msleep(1);
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 = ((6000 > ext) || (54000 < ext)) ? "X" : "";
dev_dbg(&client->dev, "EXTCLK : %10u K %s\n", ext, enable);
vco = 2 * m * ext / (n+1);
enable = ((384000 > vco) || (768000 < vco)) ? "X" : "";
dev_dbg(&client->dev, "VCO : %10u K %s\n", vco, enable);
clk = vco / (p1+1) / (p2+1);
enable = (96000 < clk) ? "X" : "";
dev_dbg(&client->dev, "PIXCLK : %10u K %s\n", clk, enable);
clk = vco / (p3+1);
enable = (768000 < clk) ? "X" : "";
dev_dbg(&client->dev, "MIPICLK : %10u K %s\n", clk, enable);
clk = vco / (p6+1);
enable = (96000 < clk) ? "X" : "";
dev_dbg(&client->dev, "MCU CLK : %10u K %s\n", clk, enable);
clk = vco / (p5+1);
enable = (54000 < clk) ? "X" : "";
dev_dbg(&client->dev, "SOC CLK : %10u K %s\n", clk, enable);
clk = vco / (p4+1);
enable = (70000 < clk) ? "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 = ((2000 > clk) || (24000 < clk)) ? "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)
{
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);
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 (!(0x4000 & data))
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 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
*/
/* 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
************************************************************************/
static int mt9t112_g_chip_ident(struct v4l2_subdev *sd,
struct v4l2_dbg_chip_ident *id)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct mt9t112_priv *priv = to_mt9t112(client);
id->ident = priv->model;
id->revision = 0;
return 0;
}
#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,
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 struct v4l2_subdev_core_ops mt9t112_subdev_core_ops = {
.g_chip_ident = mt9t112_g_chip_ident,
#ifdef CONFIG_VIDEO_ADV_DEBUG
.g_register = mt9t112_g_register,
.s_register = mt9t112_s_register,
#endif
};
/************************************************************************
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->flags & INIT_DONE)) {
u16 param = PCLK_RISING & priv->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->flags |= INIT_DONE;
}
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,
enum v4l2_mbus_pixelcode code)
{
int i;
/*
* get color format
*/
for (i = 0; i < ARRAY_SIZE(mt9t112_cfmts); i++)
if (mt9t112_cfmts[i].code == code)
break;
if (i == ARRAY_SIZE(mt9t112_cfmts))
return -EINVAL;
priv->frame = *rect;
/*
* frame size check
*/
mt9t112_frame_check(&priv->frame.width, &priv->frame.height,
&priv->frame.left, &priv->frame.top);
priv->format = mt9t112_cfmts + i;
return 0;
}
static int mt9t112_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
{
a->bounds.left = 0;
a->bounds.top = 0;
a->bounds.width = MAX_WIDTH;
a->bounds.height = MAX_HEIGHT;
a->defrect.left = 0;
a->defrect.top = 0;
a->defrect.width = VGA_WIDTH;
a->defrect.height = VGA_HEIGHT;
a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
a->pixelaspect.numerator = 1;
a->pixelaspect.denominator = 1;
return 0;
}
static int mt9t112_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct mt9t112_priv *priv = to_mt9t112(client);
a->c = priv->frame;
a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
return 0;
}
static int mt9t112_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct mt9t112_priv *priv = to_mt9t112(client);
struct v4l2_rect *rect = &a->c;
return mt9t112_set_params(priv, rect, priv->format->code);
}
static int mt9t112_g_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);
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_try_fmt(struct v4l2_subdev *sd,
struct v4l2_mbus_framefmt *mf)
{
unsigned int top, left;
int i;
for (i = 0; i < ARRAY_SIZE(mt9t112_cfmts); i++)
if (mt9t112_cfmts[i].code == mf->code)
break;
if (i == ARRAY_SIZE(mt9t112_cfmts)) {
mf->code = V4L2_MBUS_FMT_UYVY8_2X8;
mf->colorspace = V4L2_COLORSPACE_JPEG;
} else {
mf->colorspace = mt9t112_cfmts[i].colorspace;
}
mt9t112_frame_check(&mf->width, &mf->height, &left, &top);
mf->field = V4L2_FIELD_NONE;
return 0;
}
static int mt9t112_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
enum v4l2_mbus_pixelcode *code)
{
if (index >= ARRAY_SIZE(mt9t112_cfmts))
return -EINVAL;
*code = mt9t112_cfmts[index].code;
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_link *icl = soc_camera_i2c_to_link(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(icl, 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_link *icl = soc_camera_i2c_to_link(client);
struct mt9t112_priv *priv = to_mt9t112(client);
if (soc_camera_apply_board_flags(icl, cfg) & V4L2_MBUS_PCLK_SAMPLE_RISING)
priv->flags |= PCLK_RISING;
return 0;
}
static struct v4l2_subdev_video_ops mt9t112_subdev_video_ops = {
.s_stream = mt9t112_s_stream,
.g_mbus_fmt = mt9t112_g_fmt,
.s_mbus_fmt = mt9t112_s_fmt,
.try_mbus_fmt = mt9t112_try_fmt,
.cropcap = mt9t112_cropcap,
.g_crop = mt9t112_g_crop,
.s_crop = mt9t112_s_crop,
.enum_mbus_fmt = mt9t112_enum_fmt,
.g_mbus_config = mt9t112_g_mbus_config,
.s_mbus_config = mt9t112_s_mbus_config,
};
/************************************************************************
i2c driver
************************************************************************/
static struct v4l2_subdev_ops mt9t112_subdev_ops = {
.core = &mt9t112_subdev_core_ops,
.video = &mt9t112_subdev_video_ops,
};
static int mt9t112_camera_probe(struct i2c_client *client)
{
struct mt9t112_priv *priv = to_mt9t112(client);
const char *devname;
int chipid;
/*
* check and show chip ID
*/
mt9t112_reg_read(chipid, client, 0x0000);
switch (chipid) {
case 0x2680:
devname = "mt9t111";
priv->model = V4L2_IDENT_MT9T111;
break;
case 0x2682:
devname = "mt9t112";
priv->model = V4L2_IDENT_MT9T112;
break;
default:
dev_err(&client->dev, "Product ID error %04x\n", chipid);
return -ENODEV;
}
dev_info(&client->dev, "%s chip ID %04x\n", devname, chipid);
return 0;
}
static int mt9t112_probe(struct i2c_client *client,
const struct i2c_device_id *did)
{
struct mt9t112_priv *priv;
struct soc_camera_link *icl = soc_camera_i2c_to_link(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 (!icl || !icl->priv) {
dev_err(&client->dev, "mt9t112: missing platform data!\n");
return -EINVAL;
}
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
priv->info = icl->priv;
v4l2_i2c_subdev_init(&priv->subdev, client, &mt9t112_subdev_ops);
ret = mt9t112_camera_probe(client);
if (ret) {
kfree(priv);
return ret;
}
/* Cannot fail: using the default supported pixel code */
mt9t112_set_params(priv, &rect, V4L2_MBUS_FMT_UYVY8_2X8);
return ret;
}
static int mt9t112_remove(struct i2c_client *client)
{
struct mt9t112_priv *priv = to_mt9t112(client);
kfree(priv);
return 0;
}
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 function
************************************************************************/
static int __init mt9t112_module_init(void)
{
return i2c_add_driver(&mt9t112_i2c_driver);
}
static void __exit mt9t112_module_exit(void)
{
i2c_del_driver(&mt9t112_i2c_driver);
}
module_init(mt9t112_module_init);
module_exit(mt9t112_module_exit);
MODULE_DESCRIPTION("SoC Camera driver for mt9t112");
MODULE_AUTHOR("Kuninori Morimoto");
MODULE_LICENSE("GPL v2");
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