diff options
Diffstat (limited to 'drivers/media/video/rj54n1cb0c.c')
| -rw-r--r-- | drivers/media/video/rj54n1cb0c.c | 1219 |
1 files changed, 1219 insertions, 0 deletions
diff --git a/drivers/media/video/rj54n1cb0c.c b/drivers/media/video/rj54n1cb0c.c new file mode 100644 index 00000000000..373f2a30a67 --- /dev/null +++ b/drivers/media/video/rj54n1cb0c.c @@ -0,0 +1,1219 @@ +/* + * 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"); |