/*
* Driver for RJ54N1CB0C CMOS Image Sensor from Micron
*
* Copyright (C) 2009, Guennadi Liakhovetski <g.liakhovetski@gmx.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/slab.h>
#include <linux/videodev2.h>
#include <media/v4l2-subdev.h>
#include <media/v4l2-chip-ident.h>
#include <media/soc_camera.h>
#define RJ54N1_DEV_CODE 0x0400
#define RJ54N1_DEV_CODE2 0x0401
#define RJ54N1_OUT_SEL 0x0403
#define RJ54N1_XY_OUTPUT_SIZE_S_H 0x0404
#define RJ54N1_X_OUTPUT_SIZE_S_L 0x0405
#define RJ54N1_Y_OUTPUT_SIZE_S_L 0x0406
#define RJ54N1_XY_OUTPUT_SIZE_P_H 0x0407
#define RJ54N1_X_OUTPUT_SIZE_P_L 0x0408
#define RJ54N1_Y_OUTPUT_SIZE_P_L 0x0409
#define RJ54N1_LINE_LENGTH_PCK_S_H 0x040a
#define RJ54N1_LINE_LENGTH_PCK_S_L 0x040b
#define RJ54N1_LINE_LENGTH_PCK_P_H 0x040c
#define RJ54N1_LINE_LENGTH_PCK_P_L 0x040d
#define RJ54N1_RESIZE_N 0x040e
#define RJ54N1_RESIZE_N_STEP 0x040f
#define RJ54N1_RESIZE_STEP 0x0410
#define RJ54N1_RESIZE_HOLD_H 0x0411
#define RJ54N1_RESIZE_HOLD_L 0x0412
#define RJ54N1_H_OBEN_OFS 0x0413
#define RJ54N1_V_OBEN_OFS 0x0414
#define RJ54N1_RESIZE_CONTROL 0x0415
#define RJ54N1_INC_USE_SEL_H 0x0425
#define RJ54N1_INC_USE_SEL_L 0x0426
#define RJ54N1_MIRROR_STILL_MODE 0x0427
#define RJ54N1_INIT_START 0x0428
#define RJ54N1_SCALE_1_2_LEV 0x0429
#define RJ54N1_SCALE_4_LEV 0x042a
#define RJ54N1_Y_GAIN 0x04d8
#define RJ54N1_APT_GAIN_UP 0x04fa
#define RJ54N1_RA_SEL_UL 0x0530
#define RJ54N1_BYTE_SWAP 0x0531
#define RJ54N1_OUT_SIGPO 0x053b
#define RJ54N1_FRAME_LENGTH_S_H 0x0595
#define RJ54N1_FRAME_LENGTH_S_L 0x0596
#define RJ54N1_FRAME_LENGTH_P_H 0x0597
#define RJ54N1_FRAME_LENGTH_P_L 0x0598
#define RJ54N1_IOC 0x05ef
#define RJ54N1_TG_BYPASS 0x0700
#define RJ54N1_PLL_L 0x0701
#define RJ54N1_PLL_N 0x0702
#define RJ54N1_PLL_EN 0x0704
#define RJ54N1_RATIO_TG 0x0706
#define RJ54N1_RATIO_T 0x0707
#define RJ54N1_RATIO_R 0x0708
#define RJ54N1_RAMP_TGCLK_EN 0x0709
#define RJ54N1_OCLK_DSP 0x0710
#define RJ54N1_RATIO_OP 0x0711
#define RJ54N1_RATIO_O 0x0712
#define RJ54N1_OCLK_SEL_EN 0x0713
#define RJ54N1_CLK_RST 0x0717
#define RJ54N1_RESET_STANDBY 0x0718
#define E_EXCLK (1 << 7)
#define SOFT_STDBY (1 << 4)
#define SEN_RSTX (1 << 2)
#define TG_RSTX (1 << 1)
#define DSP_RSTX (1 << 0)
#define RESIZE_HOLD_SEL (1 << 2)
#define RESIZE_GO (1 << 1)
#define RJ54N1_COLUMN_SKIP 0
#define RJ54N1_ROW_SKIP 0
#define RJ54N1_MAX_WIDTH 1600
#define RJ54N1_MAX_HEIGHT 1200
/* I2C addresses: 0x50, 0x51, 0x60, 0x61 */
static const struct soc_camera_data_format rj54n1_colour_formats[] = {
{
.name = "YUYV",
.depth = 16,
.fourcc = V4L2_PIX_FMT_YUYV,
.colorspace = V4L2_COLORSPACE_JPEG,
}, {
.name = "RGB565",
.depth = 16,
.fourcc = V4L2_PIX_FMT_RGB565,
.colorspace = V4L2_COLORSPACE_SRGB,
}
};
struct rj54n1_clock_div {
u8 ratio_tg;
u8 ratio_t;
u8 ratio_r;
u8 ratio_op;
u8 ratio_o;
};
struct rj54n1 {
struct v4l2_subdev subdev;
struct v4l2_rect rect; /* Sensor window */
unsigned short width; /* Output window */
unsigned short height;
unsigned short resize; /* Sensor * 1024 / resize = Output */
struct rj54n1_clock_div clk_div;
u32 fourcc;
unsigned short scale;
u8 bank;
};
struct rj54n1_reg_val {
u16 reg;
u8 val;
};
const static struct rj54n1_reg_val bank_4[] = {
{0x417, 0},
{0x42c, 0},
{0x42d, 0xf0},
{0x42e, 0},
{0x42f, 0x50},
{0x430, 0xf5},
{0x431, 0x16},
{0x432, 0x20},
{0x433, 0},
{0x434, 0xc8},
{0x43c, 8},
{0x43e, 0x90},
{0x445, 0x83},
{0x4ba, 0x58},
{0x4bb, 4},
{0x4bc, 0x20},
{0x4db, 4},
{0x4fe, 2},
};
const static struct rj54n1_reg_val bank_5[] = {
{0x514, 0},
{0x516, 0},
{0x518, 0},
{0x51a, 0},
{0x51d, 0xff},
{0x56f, 0x28},
{0x575, 0x40},
{0x5bc, 0x48},
{0x5c1, 6},
{0x5e5, 0x11},
{0x5e6, 0x43},
{0x5e7, 0x33},
{0x5e8, 0x21},
{0x5e9, 0x30},
{0x5ea, 0x0},
{0x5eb, 0xa5},
{0x5ec, 0xff},
{0x5fe, 2},
};
const static struct rj54n1_reg_val bank_7[] = {
{0x70a, 0},
{0x714, 0xff},
{0x715, 0xff},
{0x716, 0x1f},
{0x7FE, 0x02},
};
const static struct rj54n1_reg_val bank_8[] = {
{0x800, 0x00},
{0x801, 0x01},
{0x802, 0x61},
{0x805, 0x00},
{0x806, 0x00},
{0x807, 0x00},
{0x808, 0x00},
{0x809, 0x01},
{0x80A, 0x61},
{0x80B, 0x00},
{0x80C, 0x01},
{0x80D, 0x00},
{0x80E, 0x00},
{0x80F, 0x00},
{0x810, 0x00},
{0x811, 0x01},
{0x812, 0x61},
{0x813, 0x00},
{0x814, 0x11},
{0x815, 0x00},
{0x816, 0x41},
{0x817, 0x00},
{0x818, 0x51},
{0x819, 0x01},
{0x81A, 0x1F},
{0x81B, 0x00},
{0x81C, 0x01},
{0x81D, 0x00},
{0x81E, 0x11},
{0x81F, 0x00},
{0x820, 0x41},
{0x821, 0x00},
{0x822, 0x51},
{0x823, 0x00},
{0x824, 0x00},
{0x825, 0x00},
{0x826, 0x47},
{0x827, 0x01},
{0x828, 0x4F},
{0x829, 0x00},
{0x82A, 0x00},
{0x82B, 0x00},
{0x82C, 0x30},
{0x82D, 0x00},
{0x82E, 0x40},
{0x82F, 0x00},
{0x830, 0xB3},
{0x831, 0x00},
{0x832, 0xE3},
{0x833, 0x00},
{0x834, 0x00},
{0x835, 0x00},
{0x836, 0x00},
{0x837, 0x00},
{0x838, 0x00},
{0x839, 0x01},
{0x83A, 0x61},
{0x83B, 0x00},
{0x83C, 0x01},
{0x83D, 0x00},
{0x83E, 0x00},
{0x83F, 0x00},
{0x840, 0x00},
{0x841, 0x01},
{0x842, 0x61},
{0x843, 0x00},
{0x844, 0x1D},
{0x845, 0x00},
{0x846, 0x00},
{0x847, 0x00},
{0x848, 0x00},
{0x849, 0x01},
{0x84A, 0x1F},
{0x84B, 0x00},
{0x84C, 0x05},
{0x84D, 0x00},
{0x84E, 0x19},
{0x84F, 0x01},
{0x850, 0x21},
{0x851, 0x01},
{0x852, 0x5D},
{0x853, 0x00},
{0x854, 0x00},
{0x855, 0x00},
{0x856, 0x19},
{0x857, 0x01},
{0x858, 0x21},
{0x859, 0x00},
{0x85A, 0x00},
{0x85B, 0x00},
{0x85C, 0x00},
{0x85D, 0x00},
{0x85E, 0x00},
{0x85F, 0x00},
{0x860, 0xB3},
{0x861, 0x00},
{0x862, 0xE3},
{0x863, 0x00},
{0x864, 0x00},
{0x865, 0x00},
{0x866, 0x00},
{0x867, 0x00},
{0x868, 0x00},
{0x869, 0xE2},
{0x86A, 0x00},
{0x86B, 0x01},
{0x86C, 0x06},
{0x86D, 0x00},
{0x86E, 0x00},
{0x86F, 0x00},
{0x870, 0x60},
{0x871, 0x8C},
{0x872, 0x10},
{0x873, 0x00},
{0x874, 0xE0},
{0x875, 0x00},
{0x876, 0x27},
{0x877, 0x01},
{0x878, 0x00},
{0x879, 0x00},
{0x87A, 0x00},
{0x87B, 0x03},
{0x87C, 0x00},
{0x87D, 0x00},
{0x87E, 0x00},
{0x87F, 0x00},
{0x880, 0x00},
{0x881, 0x00},
{0x882, 0x00},
{0x883, 0x00},
{0x884, 0x00},
{0x885, 0x00},
{0x886, 0xF8},
{0x887, 0x00},
{0x888, 0x03},
{0x889, 0x00},
{0x88A, 0x64},
{0x88B, 0x00},
{0x88C, 0x03},
{0x88D, 0x00},
{0x88E, 0xB1},
{0x88F, 0x00},
{0x890, 0x03},
{0x891, 0x01},
{0x892, 0x1D},
{0x893, 0x00},
{0x894, 0x03},
{0x895, 0x01},
{0x896, 0x4B},
{0x897, 0x00},
{0x898, 0xE5},
{0x899, 0x00},
{0x89A, 0x01},
{0x89B, 0x00},
{0x89C, 0x01},
{0x89D, 0x04},
{0x89E, 0xC8},
{0x89F, 0x00},
{0x8A0, 0x01},
{0x8A1, 0x01},
{0x8A2, 0x61},
{0x8A3, 0x00},
{0x8A4, 0x01},
{0x8A5, 0x00},
{0x8A6, 0x00},
{0x8A7, 0x00},
{0x8A8, 0x00},
{0x8A9, 0x00},
{0x8AA, 0x7F},
{0x8AB, 0x03},
{0x8AC, 0x00},
{0x8AD, 0x00},
{0x8AE, 0x00},
{0x8AF, 0x00},
{0x8B0, 0x00},
{0x8B1, 0x00},
{0x8B6, 0x00},
{0x8B7, 0x01},
{0x8B8, 0x00},
{0x8B9, 0x00},
{0x8BA, 0x02},
{0x8BB, 0x00},
{0x8BC, 0xFF},
{0x8BD, 0x00},
{0x8FE, 0x02},
};
const static struct rj54n1_reg_val bank_10[] = {
{0x10bf, 0x69}
};
/* Clock dividers - these are default register values, divider = register + 1 */
const static struct rj54n1_clock_div clk_div = {
.ratio_tg = 3 /* default: 5 */,
.ratio_t = 4 /* default: 1 */,
.ratio_r = 4 /* default: 0 */,
.ratio_op = 1 /* default: 5 */,
.ratio_o = 9 /* default: 0 */,
};
static struct rj54n1 *to_rj54n1(const struct i2c_client *client)
{
return container_of(i2c_get_clientdata(client), struct rj54n1, subdev);
}
static int reg_read(struct i2c_client *client, const u16 reg)
{
struct rj54n1 *rj54n1 = to_rj54n1(client);
int ret;
/* set bank */
if (rj54n1->bank != reg >> 8) {
dev_dbg(&client->dev, "[0x%x] = 0x%x\n", 0xff, reg >> 8);
ret = i2c_smbus_write_byte_data(client, 0xff, reg >> 8);
if (ret < 0)
return ret;
rj54n1->bank = reg >> 8;
}
return i2c_smbus_read_byte_data(client, reg & 0xff);
}
static int reg_write(struct i2c_client *client, const u16 reg,
const u8 data)
{
struct rj54n1 *rj54n1 = to_rj54n1(client);
int ret;
/* set bank */
if (rj54n1->bank != reg >> 8) {
dev_dbg(&client->dev, "[0x%x] = 0x%x\n", 0xff, reg >> 8);
ret = i2c_smbus_write_byte_data(client, 0xff, reg >> 8);
if (ret < 0)
return ret;
rj54n1->bank = reg >> 8;
}
dev_dbg(&client->dev, "[0x%x] = 0x%x\n", reg & 0xff, data);
return i2c_smbus_write_byte_data(client, reg & 0xff, data);
}
static int reg_set(struct i2c_client *client, const u16 reg,
const u8 data, const u8 mask)
{
int ret;
ret = reg_read(client, reg);
if (ret < 0)
return ret;
return reg_write(client, reg, (ret & ~mask) | (data & mask));
}
static int reg_write_multiple(struct i2c_client *client,
const struct rj54n1_reg_val *rv, const int n)
{
int i, ret;
for (i = 0; i < n; i++) {
ret = reg_write(client, rv->reg, rv->val);
if (ret < 0)
return ret;
rv++;
}
return 0;
}
static int rj54n1_s_stream(struct v4l2_subdev *sd, int enable)
{
/* TODO: start / stop streaming */
return 0;
}
static int rj54n1_set_bus_param(struct soc_camera_device *icd,
unsigned long flags)
{
struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
struct i2c_client *client = sd->priv;
/* Figures 2.5-1 to 2.5-3 - default falling pixclk edge */
if (flags & SOCAM_PCLK_SAMPLE_RISING)
return reg_write(client, RJ54N1_OUT_SIGPO, 1 << 4);
else
return reg_write(client, RJ54N1_OUT_SIGPO, 0);
}
static unsigned long rj54n1_query_bus_param(struct soc_camera_device *icd)
{
struct soc_camera_link *icl = to_soc_camera_link(icd);
const unsigned long flags =
SOCAM_PCLK_SAMPLE_RISING | SOCAM_PCLK_SAMPLE_FALLING |
SOCAM_MASTER | SOCAM_DATAWIDTH_8 |
SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_HIGH |
SOCAM_DATA_ACTIVE_HIGH;
return soc_camera_apply_sensor_flags(icl, flags);
}
static int rj54n1_set_rect(struct i2c_client *client,
u16 reg_x, u16 reg_y, u16 reg_xy,
u32 width, u32 height)
{
int ret;
ret = reg_write(client, reg_xy,
((width >> 4) & 0x70) |
((height >> 8) & 7));
if (!ret)
ret = reg_write(client, reg_x, width & 0xff);
if (!ret)
ret = reg_write(client, reg_y, height & 0xff);
return ret;
}
/*
* Some commands, specifically certain initialisation sequences, require
* a commit operation.
*/
static int rj54n1_commit(struct i2c_client *client)
{
int ret = reg_write(client, RJ54N1_INIT_START, 1);
msleep(10);
if (!ret)
ret = reg_write(client, RJ54N1_INIT_START, 0);
return ret;
}
static int rj54n1_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
{
struct i2c_client *client = sd->priv;
struct rj54n1 *rj54n1 = to_rj54n1(client);
a->c = rj54n1->rect;
a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
return 0;
}
static int rj54n1_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
{
a->bounds.left = RJ54N1_COLUMN_SKIP;
a->bounds.top = RJ54N1_ROW_SKIP;
a->bounds.width = RJ54N1_MAX_WIDTH;
a->bounds.height = RJ54N1_MAX_HEIGHT;
a->defrect = a->bounds;
a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
a->pixelaspect.numerator = 1;
a->pixelaspect.denominator = 1;
return 0;
}
static int rj54n1_g_fmt(struct v4l2_subdev *sd, struct v4l2_format *f)
{
struct i2c_client *client = sd->priv;
struct rj54n1 *rj54n1 = to_rj54n1(client);
struct v4l2_pix_format *pix = &f->fmt.pix;
pix->pixelformat = rj54n1->fourcc;
pix->field = V4L2_FIELD_NONE;
pix->width = rj54n1->width;
pix->height = rj54n1->height;
return 0;
}
/*
* The actual geometry configuration routine. It scales the input window into
* the output one, updates the window sizes and returns an error or the resize
* coefficient on success. Note: we only use the "Fixed Scaling" on this camera.
*/
static int rj54n1_sensor_scale(struct v4l2_subdev *sd, u32 *in_w, u32 *in_h,
u32 *out_w, u32 *out_h)
{
struct i2c_client *client = sd->priv;
unsigned int skip, resize, input_w = *in_w, input_h = *in_h,
output_w = *out_w, output_h = *out_h;
u16 inc_sel;
int ret;
ret = rj54n1_set_rect(client, RJ54N1_X_OUTPUT_SIZE_S_L,
RJ54N1_Y_OUTPUT_SIZE_S_L,
RJ54N1_XY_OUTPUT_SIZE_S_H, output_w, output_h);
if (!ret)
ret = rj54n1_set_rect(client, RJ54N1_X_OUTPUT_SIZE_P_L,
RJ54N1_Y_OUTPUT_SIZE_P_L,
RJ54N1_XY_OUTPUT_SIZE_P_H, output_w, output_h);
if (ret < 0)
return ret;
if (output_w > input_w || output_h > input_h) {
input_w = output_w;
input_h = output_h;
resize = 1024;
} else {
unsigned int resize_x, resize_y;
resize_x = input_w * 1024 / output_w;
resize_y = input_h * 1024 / output_h;
resize = min(resize_x, resize_y);
/* Prohibited value ranges */
switch (resize) {
case 2040 ... 2047:
resize = 2039;
break;
case 4080 ... 4095:
resize = 4079;
break;
case 8160 ... 8191:
resize = 8159;
break;
case 16320 ... 16383:
resize = 16319;
}
input_w = output_w * resize / 1024;
input_h = output_h * resize / 1024;
}
/* Set scaling */
ret = reg_write(client, RJ54N1_RESIZE_HOLD_L, resize & 0xff);
if (!ret)
ret = reg_write(client, RJ54N1_RESIZE_HOLD_H, resize >> 8);
if (ret < 0)
return ret;
/*
* Configure a skipping bitmask. The sensor will select a skipping value
* among set bits automatically.
*/
skip = min(resize / 1024, (unsigned)15);
inc_sel = 1 << skip;
if (inc_sel <= 2)
inc_sel = 0xc;
else if (resize & 1023 && skip < 15)
inc_sel |= 1 << (skip + 1);
ret = reg_write(client, RJ54N1_INC_USE_SEL_L, inc_sel & 0xfc);
if (!ret)
ret = reg_write(client, RJ54N1_INC_USE_SEL_H, inc_sel >> 8);
/* Start resizing */
if (!ret)
ret = reg_write(client, RJ54N1_RESIZE_CONTROL,
RESIZE_HOLD_SEL | RESIZE_GO | 1);
if (ret < 0)
return ret;
dev_dbg(&client->dev, "resize %u, skip %u\n", resize, skip);
/* Constant taken from manufacturer's example */
msleep(230);
ret = reg_write(client, RJ54N1_RESIZE_CONTROL, RESIZE_HOLD_SEL | 1);
if (ret < 0)
return ret;
*in_w = input_w;
*in_h = input_h;
*out_w = output_w;
*out_h = output_h;
return resize;
}
static int rj54n1_set_clock(struct i2c_client *client)
{
struct rj54n1 *rj54n1 = to_rj54n1(client);
int ret;
/* Enable external clock */
ret = reg_write(client, RJ54N1_RESET_STANDBY, E_EXCLK | SOFT_STDBY);
/* Leave stand-by */
if (!ret)
ret = reg_write(client, RJ54N1_RESET_STANDBY, E_EXCLK);
if (!ret)
ret = reg_write(client, RJ54N1_PLL_L, 2);
if (!ret)
ret = reg_write(client, RJ54N1_PLL_N, 0x31);
/* TGCLK dividers */
if (!ret)
ret = reg_write(client, RJ54N1_RATIO_TG,
rj54n1->clk_div.ratio_tg);
if (!ret)
ret = reg_write(client, RJ54N1_RATIO_T,
rj54n1->clk_div.ratio_t);
if (!ret)
ret = reg_write(client, RJ54N1_RATIO_R,
rj54n1->clk_div.ratio_r);
/* Enable TGCLK & RAMP */
if (!ret)
ret = reg_write(client, RJ54N1_RAMP_TGCLK_EN, 3);
/* Disable clock output */
if (!ret)
ret = reg_write(client, RJ54N1_OCLK_DSP, 0);
/* Set divisors */
if (!ret)
ret = reg_write(client, RJ54N1_RATIO_OP,
rj54n1->clk_div.ratio_op);
if (!ret)
ret = reg_write(client, RJ54N1_RATIO_O,
rj54n1->clk_div.ratio_o);
/* Enable OCLK */
if (!ret)
ret = reg_write(client, RJ54N1_OCLK_SEL_EN, 1);
/* Use PLL for Timing Generator, write 2 to reserved bits */
if (!ret)
ret = reg_write(client, RJ54N1_TG_BYPASS, 2);
/* Take sensor out of reset */
if (!ret)
ret = reg_write(client, RJ54N1_RESET_STANDBY,
E_EXCLK | SEN_RSTX);
/* Enable PLL */
if (!ret)
ret = reg_write(client, RJ54N1_PLL_EN, 1);
/* Wait for PLL to stabilise */
msleep(10);
/* Enable clock to frequency divider */
if (!ret)
ret = reg_write(client, RJ54N1_CLK_RST, 1);
if (!ret)
ret = reg_read(client, RJ54N1_CLK_RST);
if (ret != 1) {
dev_err(&client->dev,
"Resetting RJ54N1CB0C clock failed: %d!\n", ret);
return -EIO;
}
/* Start the PLL */
ret = reg_set(client, RJ54N1_OCLK_DSP, 1, 1);
/* Enable OCLK */
if (!ret)
ret = reg_write(client, RJ54N1_OCLK_SEL_EN, 1);
return ret;
}
static int rj54n1_reg_init(struct i2c_client *client)
{
int ret = rj54n1_set_clock(client);
if (!ret)
ret = reg_write_multiple(client, bank_7, ARRAY_SIZE(bank_7));
if (!ret)
ret = reg_write_multiple(client, bank_10, ARRAY_SIZE(bank_10));
/* Set binning divisors */
if (!ret)
ret = reg_write(client, RJ54N1_SCALE_1_2_LEV, 3 | (7 << 4));
if (!ret)
ret = reg_write(client, RJ54N1_SCALE_4_LEV, 0xf);
/* Switch to fixed resize mode */
if (!ret)
ret = reg_write(client, RJ54N1_RESIZE_CONTROL,
RESIZE_HOLD_SEL | 1);
/* Set gain */
if (!ret)
ret = reg_write(client, RJ54N1_Y_GAIN, 0x84);
/* Mirror the image back: default is upside down and left-to-right... */
if (!ret)
ret = reg_set(client, RJ54N1_MIRROR_STILL_MODE, 3, 3);
if (!ret)
ret = reg_write_multiple(client, bank_4, ARRAY_SIZE(bank_4));
if (!ret)
ret = reg_write_multiple(client, bank_5, ARRAY_SIZE(bank_5));
if (!ret)
ret = reg_write_multiple(client, bank_8, ARRAY_SIZE(bank_8));
if (!ret)
ret = reg_write(client, RJ54N1_RESET_STANDBY,
E_EXCLK | DSP_RSTX | SEN_RSTX);
/* Commit init */
if (!ret)
ret = rj54n1_commit(client);
/* Take DSP, TG, sensor out of reset */
if (!ret)
ret = reg_write(client, RJ54N1_RESET_STANDBY,
E_EXCLK | DSP_RSTX | TG_RSTX | SEN_RSTX);
if (!ret)
ret = reg_write(client, 0x7fe, 2);
/* Constant taken from manufacturer's example */
msleep(700);
return ret;
}
/* FIXME: streaming output only up to 800x600 is functional */
static int rj54n1_try_fmt(struct v4l2_subdev *sd, struct v4l2_format *f)
{
struct v4l2_pix_format *pix = &f->fmt.pix;
pix->field = V4L2_FIELD_NONE;
if (pix->width > 800)
pix->width = 800;
if (pix->height > 600)
pix->height = 600;
return 0;
}
static int rj54n1_s_fmt(struct v4l2_subdev *sd, struct v4l2_format *f)
{
struct i2c_client *client = sd->priv;
struct rj54n1 *rj54n1 = to_rj54n1(client);
struct v4l2_pix_format *pix = &f->fmt.pix;
unsigned int output_w, output_h,
input_w = rj54n1->rect.width, input_h = rj54n1->rect.height;
int ret;
/*
* The host driver can call us without .try_fmt(), so, we have to take
* care ourseleves
*/
ret = rj54n1_try_fmt(sd, f);
/*
* Verify if the sensor has just been powered on. TODO: replace this
* with proper PM, when a suitable API is available.
*/
if (!ret)
ret = reg_read(client, RJ54N1_RESET_STANDBY);
if (ret < 0)
return ret;
if (!(ret & E_EXCLK)) {
ret = rj54n1_reg_init(client);
if (ret < 0)
return ret;
}
/* RA_SEL_UL is only relevant for raw modes, ignored otherwise. */
switch (pix->pixelformat) {
case V4L2_PIX_FMT_YUYV:
ret = reg_write(client, RJ54N1_OUT_SEL, 0);
if (!ret)
ret = reg_set(client, RJ54N1_BYTE_SWAP, 8, 8);
break;
case V4L2_PIX_FMT_RGB565:
ret = reg_write(client, RJ54N1_OUT_SEL, 0x11);
if (!ret)
ret = reg_set(client, RJ54N1_BYTE_SWAP, 8, 8);
break;
default:
ret = -EINVAL;
}
if (ret < 0)
return ret;
/* Supported scales 1:1 - 1:16 */
if (pix->width < input_w / 16)
pix->width = input_w / 16;
if (pix->height < input_h / 16)
pix->height = input_h / 16;
output_w = pix->width;
output_h = pix->height;
ret = rj54n1_sensor_scale(sd, &input_w, &input_h, &output_w, &output_h);
if (ret < 0)
return ret;
rj54n1->fourcc = pix->pixelformat;
rj54n1->resize = ret;
rj54n1->rect.width = input_w;
rj54n1->rect.height = input_h;
rj54n1->width = output_w;
rj54n1->height = output_h;
pix->width = output_w;
pix->height = output_h;
pix->field = V4L2_FIELD_NONE;
return ret;
}
static int rj54n1_g_chip_ident(struct v4l2_subdev *sd,
struct v4l2_dbg_chip_ident *id)
{
struct i2c_client *client = sd->priv;
if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR)
return -EINVAL;
if (id->match.addr != client->addr)
return -ENODEV;
id->ident = V4L2_IDENT_RJ54N1CB0C;
id->revision = 0;
return 0;
}
#ifdef CONFIG_VIDEO_ADV_DEBUG
static int rj54n1_g_register(struct v4l2_subdev *sd,
struct v4l2_dbg_register *reg)
{
struct i2c_client *client = sd->priv;
if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR ||
reg->reg < 0x400 || reg->reg > 0x1fff)
/* Registers > 0x0800 are only available from Sharp support */
return -EINVAL;
if (reg->match.addr != client->addr)
return -ENODEV;
reg->size = 1;
reg->val = reg_read(client, reg->reg);
if (reg->val > 0xff)
return -EIO;
return 0;
}
static int rj54n1_s_register(struct v4l2_subdev *sd,
struct v4l2_dbg_register *reg)
{
struct i2c_client *client = sd->priv;
if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR ||
reg->reg < 0x400 || reg->reg > 0x1fff)
/* Registers >= 0x0800 are only available from Sharp support */
return -EINVAL;
if (reg->match.addr != client->addr)
return -ENODEV;
if (reg_write(client, reg->reg, reg->val) < 0)
return -EIO;
return 0;
}
#endif
static const struct v4l2_queryctrl rj54n1_controls[] = {
{
.id = V4L2_CID_VFLIP,
.type = V4L2_CTRL_TYPE_BOOLEAN,
.name = "Flip Vertically",
.minimum = 0,
.maximum = 1,
.step = 1,
.default_value = 0,
}, {
.id = V4L2_CID_HFLIP,
.type = V4L2_CTRL_TYPE_BOOLEAN,
.name = "Flip Horizontally",
.minimum = 0,
.maximum = 1,
.step = 1,
.default_value = 0,
}, {
.id = V4L2_CID_GAIN,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "Gain",
.minimum = 0,
.maximum = 127,
.step = 1,
.default_value = 66,
.flags = V4L2_CTRL_FLAG_SLIDER,
},
};
static struct soc_camera_ops rj54n1_ops = {
.set_bus_param = rj54n1_set_bus_param,
.query_bus_param = rj54n1_query_bus_param,
.controls = rj54n1_controls,
.num_controls = ARRAY_SIZE(rj54n1_controls),
};
static int rj54n1_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
{
struct i2c_client *client = sd->priv;
int data;
switch (ctrl->id) {
case V4L2_CID_VFLIP:
data = reg_read(client, RJ54N1_MIRROR_STILL_MODE);
if (data < 0)
return -EIO;
ctrl->value = !(data & 1);
break;
case V4L2_CID_HFLIP:
data = reg_read(client, RJ54N1_MIRROR_STILL_MODE);
if (data < 0)
return -EIO;
ctrl->value = !(data & 2);
break;
case V4L2_CID_GAIN:
data = reg_read(client, RJ54N1_Y_GAIN);
if (data < 0)
return -EIO;
ctrl->value = data / 2;
break;
}
return 0;
}
static int rj54n1_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
{
int data;
struct i2c_client *client = sd->priv;
const struct v4l2_queryctrl *qctrl;
qctrl = soc_camera_find_qctrl(&rj54n1_ops, ctrl->id);
if (!qctrl)
return -EINVAL;
switch (ctrl->id) {
case V4L2_CID_VFLIP:
if (ctrl->value)
data = reg_set(client, RJ54N1_MIRROR_STILL_MODE, 0, 1);
else
data = reg_set(client, RJ54N1_MIRROR_STILL_MODE, 1, 1);
if (data < 0)
return -EIO;
break;
case V4L2_CID_HFLIP:
if (ctrl->value)
data = reg_set(client, RJ54N1_MIRROR_STILL_MODE, 0, 2);
else
data = reg_set(client, RJ54N1_MIRROR_STILL_MODE, 2, 2);
if (data < 0)
return -EIO;
break;
case V4L2_CID_GAIN:
if (ctrl->value > qctrl->maximum ||
ctrl->value < qctrl->minimum)
return -EINVAL;
else if (reg_write(client, RJ54N1_Y_GAIN, ctrl->value * 2) < 0)
return -EIO;
break;
}
return 0;
}
static struct v4l2_subdev_core_ops rj54n1_subdev_core_ops = {
.g_ctrl = rj54n1_g_ctrl,
.s_ctrl = rj54n1_s_ctrl,
.g_chip_ident = rj54n1_g_chip_ident,
#ifdef CONFIG_VIDEO_ADV_DEBUG
.g_register = rj54n1_g_register,
.s_register = rj54n1_s_register,
#endif
};
static struct v4l2_subdev_video_ops rj54n1_subdev_video_ops = {
.s_stream = rj54n1_s_stream,
.s_fmt = rj54n1_s_fmt,
.g_fmt = rj54n1_g_fmt,
.try_fmt = rj54n1_try_fmt,
.g_crop = rj54n1_g_crop,
.cropcap = rj54n1_cropcap,
};
static struct v4l2_subdev_ops rj54n1_subdev_ops = {
.core = &rj54n1_subdev_core_ops,
.video = &rj54n1_subdev_video_ops,
};
static int rj54n1_pin_config(struct i2c_client *client)
{
/*
* Experimentally found out IOCTRL wired to 0. TODO: add to platform
* data: 0 or 1 << 7.
*/
return reg_write(client, RJ54N1_IOC, 0);
}
/*
* Interface active, can use i2c. If it fails, it can indeed mean, that
* this wasn't our capture interface, so, we wait for the right one
*/
static int rj54n1_video_probe(struct soc_camera_device *icd,
struct i2c_client *client)
{
int data1, data2;
int ret;
/* This could be a BUG_ON() or a WARN_ON(), or remove it completely */
if (!icd->dev.parent ||
to_soc_camera_host(icd->dev.parent)->nr != icd->iface)
return -ENODEV;
/* Read out the chip version register */
data1 = reg_read(client, RJ54N1_DEV_CODE);
data2 = reg_read(client, RJ54N1_DEV_CODE2);
if (data1 != 0x51 || data2 != 0x10) {
ret = -ENODEV;
dev_info(&client->dev, "No RJ54N1CB0C found, read 0x%x:0x%x\n",
data1, data2);
goto ei2c;
}
ret = rj54n1_pin_config(client);
if (ret < 0)
goto ei2c;
dev_info(&client->dev, "Detected a RJ54N1CB0C chip ID 0x%x:0x%x\n",
data1, data2);
ei2c:
return ret;
}
static int rj54n1_probe(struct i2c_client *client,
const struct i2c_device_id *did)
{
struct rj54n1 *rj54n1;
struct soc_camera_device *icd = client->dev.platform_data;
struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
struct soc_camera_link *icl;
int ret;
if (!icd) {
dev_err(&client->dev, "RJ54N1CB0C: missing soc-camera data!\n");
return -EINVAL;
}
icl = to_soc_camera_link(icd);
if (!icl) {
dev_err(&client->dev, "RJ54N1CB0C: missing platform data!\n");
return -EINVAL;
}
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
dev_warn(&adapter->dev,
"I2C-Adapter doesn't support I2C_FUNC_SMBUS_BYTE\n");
return -EIO;
}
rj54n1 = kzalloc(sizeof(struct rj54n1), GFP_KERNEL);
if (!rj54n1)
return -ENOMEM;
v4l2_i2c_subdev_init(&rj54n1->subdev, client, &rj54n1_subdev_ops);
icd->ops = &rj54n1_ops;
rj54n1->clk_div = clk_div;
rj54n1->rect.left = RJ54N1_COLUMN_SKIP;
rj54n1->rect.top = RJ54N1_ROW_SKIP;
rj54n1->rect.width = RJ54N1_MAX_WIDTH;
rj54n1->rect.height = RJ54N1_MAX_HEIGHT;
rj54n1->width = RJ54N1_MAX_WIDTH;
rj54n1->height = RJ54N1_MAX_HEIGHT;
rj54n1->fourcc = V4L2_PIX_FMT_YUYV;
rj54n1->resize = 1024;
ret = rj54n1_video_probe(icd, client);
if (ret < 0) {
icd->ops = NULL;
i2c_set_clientdata(client, NULL);
kfree(rj54n1);
return ret;
}
icd->formats = rj54n1_colour_formats;
icd->num_formats = ARRAY_SIZE(rj54n1_colour_formats);
return ret;
}
static int rj54n1_remove(struct i2c_client *client)
{
struct rj54n1 *rj54n1 = to_rj54n1(client);
struct soc_camera_device *icd = client->dev.platform_data;
struct soc_camera_link *icl = to_soc_camera_link(icd);
icd->ops = NULL;
if (icl->free_bus)
icl->free_bus(icl);
i2c_set_clientdata(client, NULL);
client->driver = NULL;
kfree(rj54n1);
return 0;
}
static const struct i2c_device_id rj54n1_id[] = {
{ "rj54n1cb0c", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, rj54n1_id);
static struct i2c_driver rj54n1_i2c_driver = {
.driver = {
.name = "rj54n1cb0c",
},
.probe = rj54n1_probe,
.remove = rj54n1_remove,
.id_table = rj54n1_id,
};
static int __init rj54n1_mod_init(void)
{
return i2c_add_driver(&rj54n1_i2c_driver);
}
static void __exit rj54n1_mod_exit(void)
{
i2c_del_driver(&rj54n1_i2c_driver);
}
module_init(rj54n1_mod_init);
module_exit(rj54n1_mod_exit);
MODULE_DESCRIPTION("Sharp RJ54N1CB0C Camera driver");
MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
MODULE_LICENSE("GPL v2");
