/* * Driver for RJ54N1CB0C CMOS Image Sensor from Sharp * * 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/rj54n1cb0c.h> #include <media/soc_camera.h> #include <media/soc_mediabus.h> #include <media/v4l2-subdev.h> #include <media/v4l2-chip-ident.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_STILL_CONTROL 0x0417 #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_WB_SEL_WEIGHT_I 0x054e #define RJ54N1_BIT8_WB 0x0569 #define RJ54N1_HCAPS_WB 0x056a #define RJ54N1_VCAPS_WB 0x056b #define RJ54N1_HCAPE_WB 0x056c #define RJ54N1_VCAPE_WB 0x056d #define RJ54N1_EXPOSURE_CONTROL 0x058c #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_PEAK_H 0x05b7 #define RJ54N1_PEAK_50 0x05b8 #define RJ54N1_PEAK_60 0x05b9 #define RJ54N1_PEAK_DIFF 0x05ba #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 RJ54N1_FWFLG 0x07fe #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) /* * When cropping, the camera automatically centers the cropped region, there * doesn't seem to be a way to specify an explicit location of the rectangle. */ #define RJ54N1_COLUMN_SKIP 0 #define RJ54N1_ROW_SKIP 0 #define RJ54N1_MAX_WIDTH 1600 #define RJ54N1_MAX_HEIGHT 1200 #define PLL_L 2 #define PLL_N 0x31 /* I2C addresses: 0x50, 0x51, 0x60, 0x61 */ /* RJ54N1CB0C has only one fixed colorspace per pixelcode */ struct rj54n1_datafmt { enum v4l2_mbus_pixelcode code; enum v4l2_colorspace colorspace; }; /* Find a data format by a pixel code in an array */ static const struct rj54n1_datafmt *rj54n1_find_datafmt( enum v4l2_mbus_pixelcode code, const struct rj54n1_datafmt *fmt, int n) { int i; for (i = 0; i < n; i++) if (fmt[i].code == code) return fmt + i; return NULL; } static const struct rj54n1_datafmt rj54n1_colour_fmts[] = { {V4L2_MBUS_FMT_YUYV8_2X8, V4L2_COLORSPACE_JPEG}, {V4L2_MBUS_FMT_YVYU8_2X8, V4L2_COLORSPACE_JPEG}, {V4L2_MBUS_FMT_RGB565_2X8_LE, V4L2_COLORSPACE_SRGB}, {V4L2_MBUS_FMT_RGB565_2X8_BE, V4L2_COLORSPACE_SRGB}, {V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_LE, V4L2_COLORSPACE_SRGB}, {V4L2_MBUS_FMT_SBGGR10_2X8_PADLO_LE, V4L2_COLORSPACE_SRGB}, {V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_BE, V4L2_COLORSPACE_SRGB}, {V4L2_MBUS_FMT_SBGGR10_2X8_PADLO_BE, V4L2_COLORSPACE_SRGB}, {V4L2_MBUS_FMT_SBGGR10_1X10, V4L2_COLORSPACE_SRGB}, }; struct rj54n1_clock_div { u8 ratio_tg; /* can be 0 or an odd number */ u8 ratio_t; u8 ratio_r; u8 ratio_op; u8 ratio_o; }; struct rj54n1 { struct v4l2_subdev subdev; struct rj54n1_clock_div clk_div; const struct rj54n1_datafmt *fmt; struct v4l2_rect rect; /* Sensor window */ unsigned int tgclk_mhz; bool auto_wb; unsigned short width; /* Output window */ unsigned short height; unsigned short resize; /* Sensor * 1024 / resize = Output */ unsigned short scale; u8 bank; }; struct rj54n1_reg_val { u16 reg; u8 val; }; static const 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}, }; static const 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}, }; static const struct rj54n1_reg_val bank_7[] = { {0x70a, 0}, {0x714, 0xff}, {0x715, 0xff}, {0x716, 0x1f}, {0x7FE, 2}, }; static const 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, 2}, }; static const struct rj54n1_reg_val bank_10[] = { {0x10bf, 0x69} }; /* Clock dividers - these are default register values, divider = register + 1 */ static const 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_enum_fmt(struct v4l2_subdev *sd, unsigned int index, enum v4l2_mbus_pixelcode *code) { if (index >= ARRAY_SIZE(rj54n1_colour_fmts)) return -EINVAL; *code = rj54n1_colour_fmts[index].code; return 0; } static int rj54n1_s_stream(struct v4l2_subdev *sd, int enable) { struct i2c_client *client = v4l2_get_subdevdata(sd); /* Switch between preview and still shot modes */ return reg_set(client, RJ54N1_STILL_CONTROL, (!enable) << 7, 0x80); } 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 = v4l2_get_subdevdata(sd); /* 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_sensor_scale(struct v4l2_subdev *sd, s32 *in_w, s32 *in_h, s32 *out_w, s32 *out_h); static int rj54n1_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a) { struct i2c_client *client = v4l2_get_subdevdata(sd); struct rj54n1 *rj54n1 = to_rj54n1(client); struct v4l2_rect *rect = &a->c; int dummy = 0, output_w, output_h, input_w = rect->width, input_h = rect->height; int ret; /* arbitrary minimum width and height, edges unimportant */ soc_camera_limit_side(&dummy, &input_w, RJ54N1_COLUMN_SKIP, 8, RJ54N1_MAX_WIDTH); soc_camera_limit_side(&dummy, &input_h, RJ54N1_ROW_SKIP, 8, RJ54N1_MAX_HEIGHT); output_w = (input_w * 1024 + rj54n1->resize / 2) / rj54n1->resize; output_h = (input_h * 1024 + rj54n1->resize / 2) / rj54n1->resize; dev_dbg(&client->dev, "Scaling for %dx%d : %u = %dx%d\n", input_w, input_h, rj54n1->resize, output_w, output_h); ret = rj54n1_sensor_scale(sd, &input_w, &input_h, &output_w, &output_h); if (ret < 0) return ret; rj54n1->width = output_w; rj54n1->height = output_h; rj54n1->resize = ret; rj54n1->rect.width = input_w; rj54n1->rect.height = input_h; return 0; } static int rj54n1_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a) { struct i2c_client *client = v4l2_get_subdevdata(sd); 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_mbus_framefmt *mf) { struct i2c_client *client = v4l2_get_subdevdata(sd); struct rj54n1 *rj54n1 = to_rj54n1(client); mf->code = rj54n1->fmt->code; mf->colorspace = rj54n1->fmt->colorspace; mf->field = V4L2_FIELD_NONE; mf->width = rj54n1->width; mf->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, s32 *in_w, s32 *in_h, s32 *out_w, s32 *out_h) { struct i2c_client *client = v4l2_get_subdevdata(sd); struct rj54n1 *rj54n1 = to_rj54n1(client); unsigned int skip, resize, input_w = *in_w, input_h = *in_h, output_w = *out_w, output_h = *out_h; u16 inc_sel, wb_bit8, wb_left, wb_right, wb_top, wb_bottom; unsigned int peak, peak_50, peak_60; int ret; /* * We have a problem with crops, where the window is larger than 512x384 * and output window is larger than a half of the input one. In this * case we have to either reduce the input window to equal or below * 512x384 or the output window to equal or below 1/2 of the input. */ if (output_w > max(512U, input_w / 2)) { if (2 * output_w > RJ54N1_MAX_WIDTH) { input_w = RJ54N1_MAX_WIDTH; output_w = RJ54N1_MAX_WIDTH / 2; } else { input_w = output_w * 2; } dev_dbg(&client->dev, "Adjusted output width: in %u, out %u\n", input_w, output_w); } if (output_h > max(384U, input_h / 2)) { if (2 * output_h > RJ54N1_MAX_HEIGHT) { input_h = RJ54N1_MAX_HEIGHT; output_h = RJ54N1_MAX_HEIGHT / 2; } else { input_h = output_h * 2; } dev_dbg(&client->dev, "Adjusted output height: in %u, out %u\n", input_h, output_h); } /* Idea: use the read mode for snapshots, handle separate geometries */ 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 / 2) / output_w; resize_y = (input_h * 1024 + output_h / 2) / output_h; /* We want max(resize_x, resize_y), check if it still fits */ if (resize_x > resize_y && (output_h * resize_x + 512) / 1024 > RJ54N1_MAX_HEIGHT) resize = (RJ54N1_MAX_HEIGHT * 1024 + output_h / 2) / output_h; else if (resize_y > resize_x && (output_w * resize_y + 512) / 1024 > RJ54N1_MAX_WIDTH) resize = (RJ54N1_MAX_WIDTH * 1024 + output_w / 2) / output_w; else resize = max(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 ... 16384: resize = 16319; } } /* 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. This is very unclear in the datasheet * too. I was told, in this register one enables all skipping values, * that are required for a specific resize, and the camera selects * automatically, which ones to use. But it is unclear how to identify, * which cropping values are needed. Secondly, why don't we just set all * bits and let the camera choose? Would it increase processing time and * reduce the framerate? Using 0xfffc for INC_USE_SEL doesn't seem to * improve the image quality or stability for larger frames (see comment * above), but I didn't check the framerate. */ skip = min(resize / 1024, 15U); 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); if (!rj54n1->auto_wb) { /* Auto white balance window */ wb_left = output_w / 16; wb_right = (3 * output_w / 4 - 3) / 4; wb_top = output_h / 16; wb_bottom = (3 * output_h / 4 - 3) / 4; wb_bit8 = ((wb_left >> 2) & 0x40) | ((wb_top >> 4) & 0x10) | ((wb_right >> 6) & 4) | ((wb_bottom >> 8) & 1); if (!ret) ret = reg_write(client, RJ54N1_BIT8_WB, wb_bit8); if (!ret) ret = reg_write(client, RJ54N1_HCAPS_WB, wb_left); if (!ret) ret = reg_write(client, RJ54N1_VCAPS_WB, wb_top); if (!ret) ret = reg_write(client, RJ54N1_HCAPE_WB, wb_right); if (!ret) ret = reg_write(client, RJ54N1_VCAPE_WB, wb_bottom); } /* Antiflicker */ peak = 12 * RJ54N1_MAX_WIDTH * (1 << 14) * resize / rj54n1->tgclk_mhz / 10000; peak_50 = peak / 6; peak_60 = peak / 5; if (!ret) ret = reg_write(client, RJ54N1_PEAK_H, ((peak_50 >> 4) & 0xf0) | (peak_60 >> 8)); if (!ret) ret = reg_write(client, RJ54N1_PEAK_50, peak_50); if (!ret) ret = reg_write(client, RJ54N1_PEAK_60, peak_60); if (!ret) ret = reg_write(client, RJ54N1_PEAK_DIFF, peak / 150); /* Start resizing */ if (!ret) ret = reg_write(client, RJ54N1_RESIZE_CONTROL, RESIZE_HOLD_SEL | RESIZE_GO | 1); if (ret < 0) return ret; /* 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 = (output_w * resize + 512) / 1024; *in_h = (output_h * resize + 512) / 1024; *out_w = output_w; *out_h = output_h; dev_dbg(&client->dev, "Scaled for %dx%d : %u = %ux%u, skip %u\n", *in_w, *in_h, resize, output_w, output_h, skip); 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. Note: use this when implementing suspend / resume */ if (!ret) ret = reg_write(client, RJ54N1_RESET_STANDBY, E_EXCLK); if (!ret) ret = reg_write(client, RJ54N1_PLL_L, PLL_L); if (!ret) ret = reg_write(client, RJ54N1_PLL_N, PLL_N); /* 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) { struct rj54n1 *rj54n1 = to_rj54n1(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... * Set manual preview / still shot switching */ if (!ret) ret = reg_write(client, RJ54N1_MIRROR_STILL_MODE, 0x27); if (!ret) ret = reg_write_multiple(client, bank_4, ARRAY_SIZE(bank_4)); /* Auto exposure area */ if (!ret) ret = reg_write(client, RJ54N1_EXPOSURE_CONTROL, 0x80); /* Check current auto WB config */ if (!ret) ret = reg_read(client, RJ54N1_WB_SEL_WEIGHT_I); if (ret >= 0) { rj54n1->auto_wb = ret & 0x80; 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); /* Start register update? Same register as 0x?FE in many bank_* sets */ if (!ret) ret = reg_write(client, RJ54N1_FWFLG, 2); /* Constant taken from manufacturer's example */ msleep(700); return ret; } static int rj54n1_try_fmt(struct v4l2_subdev *sd, struct v4l2_mbus_framefmt *mf) { struct i2c_client *client = v4l2_get_subdevdata(sd); struct rj54n1 *rj54n1 = to_rj54n1(client); const struct rj54n1_datafmt *fmt; int align = mf->code == V4L2_MBUS_FMT_SBGGR10_1X10 || mf->code == V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_BE || mf->code == V4L2_MBUS_FMT_SBGGR10_2X8_PADLO_BE || mf->code == V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_LE || mf->code == V4L2_MBUS_FMT_SBGGR10_2X8_PADLO_LE; dev_dbg(&client->dev, "%s: code = %d, width = %u, height = %u\n", __func__, mf->code, mf->width, mf->height); fmt = rj54n1_find_datafmt(mf->code, rj54n1_colour_fmts, ARRAY_SIZE(rj54n1_colour_fmts)); if (!fmt) { fmt = rj54n1->fmt; mf->code = fmt->code; } mf->field = V4L2_FIELD_NONE; mf->colorspace = fmt->colorspace; v4l_bound_align_image(&mf->width, 112, RJ54N1_MAX_WIDTH, align, &mf->height, 84, RJ54N1_MAX_HEIGHT, align, 0); return 0; } static int rj54n1_s_fmt(struct v4l2_subdev *sd, struct v4l2_mbus_framefmt *mf) { struct i2c_client *client = v4l2_get_subdevdata(sd); struct rj54n1 *rj54n1 = to_rj54n1(client); const struct rj54n1_datafmt *fmt; int output_w, output_h, max_w, max_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 */ rj54n1_try_fmt(sd, mf); /* * Verify if the sensor has just been powered on. TODO: replace this * with proper PM, when a suitable API is available. */ 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; } dev_dbg(&client->dev, "%s: code = %d, width = %u, height = %u\n", __func__, mf->code, mf->width, mf->height); /* RA_SEL_UL is only relevant for raw modes, ignored otherwise. */ switch (mf->code) { case V4L2_MBUS_FMT_YUYV8_2X8: ret = reg_write(client, RJ54N1_OUT_SEL, 0); if (!ret) ret = reg_set(client, RJ54N1_BYTE_SWAP, 8, 8); break; case V4L2_MBUS_FMT_YVYU8_2X8: ret = reg_write(client, RJ54N1_OUT_SEL, 0); if (!ret) ret = reg_set(client, RJ54N1_BYTE_SWAP, 0, 8); break; case V4L2_MBUS_FMT_RGB565_2X8_LE: ret = reg_write(client, RJ54N1_OUT_SEL, 0x11); if (!ret) ret = reg_set(client, RJ54N1_BYTE_SWAP, 8, 8); break; case V4L2_MBUS_FMT_RGB565_2X8_BE: ret = reg_write(client, RJ54N1_OUT_SEL, 0x11); if (!ret) ret = reg_set(client, RJ54N1_BYTE_SWAP, 0, 8); break; case V4L2_MBUS_FMT_SBGGR10_2X8_PADLO_LE: ret = reg_write(client, RJ54N1_OUT_SEL, 4); if (!ret) ret = reg_set(client, RJ54N1_BYTE_SWAP, 8, 8); if (!ret) ret = reg_write(client, RJ54N1_RA_SEL_UL, 0); break; case V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_LE: ret = reg_write(client, RJ54N1_OUT_SEL, 4); if (!ret) ret = reg_set(client, RJ54N1_BYTE_SWAP, 8, 8); if (!ret) ret = reg_write(client, RJ54N1_RA_SEL_UL, 8); break; case V4L2_MBUS_FMT_SBGGR10_2X8_PADLO_BE: ret = reg_write(client, RJ54N1_OUT_SEL, 4); if (!ret) ret = reg_set(client, RJ54N1_BYTE_SWAP, 0, 8); if (!ret) ret = reg_write(client, RJ54N1_RA_SEL_UL, 0); break; case V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_BE: ret = reg_write(client, RJ54N1_OUT_SEL, 4); if (!ret) ret = reg_set(client, RJ54N1_BYTE_SWAP, 0, 8); if (!ret) ret = reg_write(client, RJ54N1_RA_SEL_UL, 8); break; case V4L2_MBUS_FMT_SBGGR10_1X10: ret = reg_write(client, RJ54N1_OUT_SEL, 5); break; default: ret = -EINVAL; } /* Special case: a raw mode with 10 bits of data per clock tick */ if (!ret) ret = reg_set(client, RJ54N1_OCLK_SEL_EN, (mf->code == V4L2_MBUS_FMT_SBGGR10_1X10) << 1, 2); if (ret < 0) return ret; /* Supported scales 1:1 >= scale > 1:16 */ max_w = mf->width * (16 * 1024 - 1) / 1024; if (input_w > max_w) input_w = max_w; max_h = mf->height * (16 * 1024 - 1) / 1024; if (input_h > max_h) input_h = max_h; output_w = mf->width; output_h = mf->height; ret = rj54n1_sensor_scale(sd, &input_w, &input_h, &output_w, &output_h); if (ret < 0) return ret; fmt = rj54n1_find_datafmt(mf->code, rj54n1_colour_fmts, ARRAY_SIZE(rj54n1_colour_fmts)); rj54n1->fmt = fmt; rj54n1->resize = ret; rj54n1->rect.width = input_w; rj54n1->rect.height = input_h; rj54n1->width = output_w; rj54n1->height = output_h; mf->width = output_w; mf->height = output_h; mf->field = V4L2_FIELD_NONE; mf->colorspace = fmt->colorspace; return 0; } static int rj54n1_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *id) { struct i2c_client *client = v4l2_get_subdevdata(sd); 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 = v4l2_get_subdevdata(sd); 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 = v4l2_get_subdevdata(sd); 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, }, { .id = V4L2_CID_AUTO_WHITE_BALANCE, .type = V4L2_CTRL_TYPE_BOOLEAN, .name = "Auto white balance", .minimum = 0, .maximum = 1, .step = 1, .default_value = 1, }, }; 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 = v4l2_get_subdevdata(sd); struct rj54n1 *rj54n1 = to_rj54n1(client); 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; case V4L2_CID_AUTO_WHITE_BALANCE: ctrl->value = rj54n1->auto_wb; break; } return 0; } static int rj54n1_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) { int data; struct i2c_client *client = v4l2_get_subdevdata(sd); struct rj54n1 *rj54n1 = to_rj54n1(client); 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; case V4L2_CID_AUTO_WHITE_BALANCE: /* Auto WB area - whole image */ if (reg_set(client, RJ54N1_WB_SEL_WEIGHT_I, ctrl->value << 7, 0x80) < 0) return -EIO; rj54n1->auto_wb = ctrl->value; 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_mbus_fmt = rj54n1_s_fmt, .g_mbus_fmt = rj54n1_g_fmt, .try_mbus_fmt = rj54n1_try_fmt, .enum_mbus_fmt = rj54n1_enum_fmt, .g_crop = rj54n1_g_crop, .s_crop = rj54n1_s_crop, .cropcap = rj54n1_cropcap, }; static struct v4l2_subdev_ops rj54n1_subdev_ops = { .core = &rj54n1_subdev_core_ops, .video = &rj54n1_subdev_video_ops, }; /* * 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, struct rj54n1_pdata *priv) { 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; } /* Configure IOCTL polarity from the platform data: 0 or 1 << 7. */ ret = reg_write(client, RJ54N1_IOC, priv->ioctl_high << 7); 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; struct rj54n1_pdata *rj54n1_priv; int ret; if (!icd) { dev_err(&client->dev, "RJ54N1CB0C: missing soc-camera data!\n"); return -EINVAL; } icl = to_soc_camera_link(icd); if (!icl || !icl->priv) { dev_err(&client->dev, "RJ54N1CB0C: missing platform data!\n"); return -EINVAL; } rj54n1_priv = icl->priv; 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->fmt = &rj54n1_colour_fmts[0]; rj54n1->resize = 1024; rj54n1->tgclk_mhz = (rj54n1_priv->mclk_freq / PLL_L * PLL_N) / (clk_div.ratio_tg + 1) / (clk_div.ratio_t + 1); ret = rj54n1_video_probe(icd, client, rj54n1_priv); if (ret < 0) { icd->ops = NULL; kfree(rj54n1); return ret; } 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); 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");