diff options
Diffstat (limited to 'drivers/media/i2c/rj54n1cb0c.c')
| -rw-r--r-- | drivers/media/i2c/rj54n1cb0c.c | 1436 |
1 files changed, 1436 insertions, 0 deletions
diff --git a/drivers/media/i2c/rj54n1cb0c.c b/drivers/media/i2c/rj54n1cb0c.c new file mode 100644 index 000000000..4cc51e001 --- /dev/null +++ b/drivers/media/i2c/rj54n1cb0c.c @@ -0,0 +1,1436 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Driver for RJ54N1CB0C CMOS Image Sensor from Sharp + * + * Copyright (C) 2018, Jacopo Mondi <jacopo@jmondi.org> + * + * Copyright (C) 2009, Guennadi Liakhovetski <g.liakhovetski@gmx.de> + */ + +#include <linux/clk.h> +#include <linux/delay.h> +#include <linux/gpio/consumer.h> +#include <linux/i2c.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/v4l2-mediabus.h> +#include <linux/videodev2.h> + +#include <media/i2c/rj54n1cb0c.h> +#include <media/v4l2-device.h> +#include <media/v4l2-ctrls.h> +#include <media/v4l2-subdev.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 { + u32 code; + enum v4l2_colorspace colorspace; +}; + +/* Find a data format by a pixel code in an array */ +static const struct rj54n1_datafmt *rj54n1_find_datafmt( + u32 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[] = { + {MEDIA_BUS_FMT_YUYV8_2X8, V4L2_COLORSPACE_JPEG}, + {MEDIA_BUS_FMT_YVYU8_2X8, V4L2_COLORSPACE_JPEG}, + {MEDIA_BUS_FMT_RGB565_2X8_LE, V4L2_COLORSPACE_SRGB}, + {MEDIA_BUS_FMT_RGB565_2X8_BE, V4L2_COLORSPACE_SRGB}, + {MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_LE, V4L2_COLORSPACE_SRGB}, + {MEDIA_BUS_FMT_SBGGR10_2X8_PADLO_LE, V4L2_COLORSPACE_SRGB}, + {MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_BE, V4L2_COLORSPACE_SRGB}, + {MEDIA_BUS_FMT_SBGGR10_2X8_PADLO_BE, V4L2_COLORSPACE_SRGB}, + {MEDIA_BUS_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 v4l2_ctrl_handler hdl; + struct clk *clk; + struct gpio_desc *pwup_gpio; + struct gpio_desc *enable_gpio; + 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_mbus_code(struct v4l2_subdev *sd, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_mbus_code_enum *code) +{ + if (code->pad || code->index >= ARRAY_SIZE(rj54n1_colour_fmts)) + return -EINVAL; + + code->code = rj54n1_colour_fmts[code->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_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_set_selection(struct v4l2_subdev *sd, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_selection *sel) +{ + struct i2c_client *client = v4l2_get_subdevdata(sd); + struct rj54n1 *rj54n1 = to_rj54n1(client); + const struct v4l2_rect *rect = &sel->r; + int output_w, output_h, input_w = rect->width, input_h = rect->height; + int ret; + + if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE || + sel->target != V4L2_SEL_TGT_CROP) + return -EINVAL; + + /* arbitrary minimum width and height, edges unimportant */ + v4l_bound_align_image(&input_w, 8, RJ54N1_MAX_WIDTH, 0, + &input_h, 8, RJ54N1_MAX_HEIGHT, 0, 0); + + 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_get_selection(struct v4l2_subdev *sd, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_selection *sel) +{ + struct i2c_client *client = v4l2_get_subdevdata(sd); + struct rj54n1 *rj54n1 = to_rj54n1(client); + + if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE) + return -EINVAL; + + switch (sel->target) { + case V4L2_SEL_TGT_CROP_BOUNDS: + sel->r.left = RJ54N1_COLUMN_SKIP; + sel->r.top = RJ54N1_ROW_SKIP; + sel->r.width = RJ54N1_MAX_WIDTH; + sel->r.height = RJ54N1_MAX_HEIGHT; + return 0; + case V4L2_SEL_TGT_CROP: + sel->r = rj54n1->rect; + return 0; + default: + return -EINVAL; + } +} + +static int rj54n1_get_fmt(struct v4l2_subdev *sd, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_format *format) +{ + struct v4l2_mbus_framefmt *mf = &format->format; + struct i2c_client *client = v4l2_get_subdevdata(sd); + struct rj54n1 *rj54n1 = to_rj54n1(client); + + if (format->pad) + return -EINVAL; + + mf->code = rj54n1->fmt->code; + mf->colorspace = rj54n1->fmt->colorspace; + mf->ycbcr_enc = V4L2_YCBCR_ENC_601; + mf->xfer_func = V4L2_XFER_FUNC_SRGB; + mf->quantization = V4L2_QUANTIZATION_DEFAULT; + 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_set_fmt(struct v4l2_subdev *sd, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_format *format) +{ + struct v4l2_mbus_framefmt *mf = &format->format; + 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 align = mf->code == MEDIA_BUS_FMT_SBGGR10_1X10 || + mf->code == MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_BE || + mf->code == MEDIA_BUS_FMT_SBGGR10_2X8_PADLO_BE || + mf->code == MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_LE || + mf->code == MEDIA_BUS_FMT_SBGGR10_2X8_PADLO_LE; + int ret; + + if (format->pad) + return -EINVAL; + + 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); + + if (format->which == V4L2_SUBDEV_FORMAT_TRY) { + cfg->try_fmt = *mf; + return 0; + } + + /* + * 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; + } + + /* RA_SEL_UL is only relevant for raw modes, ignored otherwise. */ + switch (mf->code) { + case MEDIA_BUS_FMT_YUYV8_2X8: + ret = reg_write(client, RJ54N1_OUT_SEL, 0); + if (!ret) + ret = reg_set(client, RJ54N1_BYTE_SWAP, 8, 8); + break; + case MEDIA_BUS_FMT_YVYU8_2X8: + ret = reg_write(client, RJ54N1_OUT_SEL, 0); + if (!ret) + ret = reg_set(client, RJ54N1_BYTE_SWAP, 0, 8); + break; + case MEDIA_BUS_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 MEDIA_BUS_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 MEDIA_BUS_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 MEDIA_BUS_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 MEDIA_BUS_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 MEDIA_BUS_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 MEDIA_BUS_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 == MEDIA_BUS_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; +} + +#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->reg < 0x400 || reg->reg > 0x1fff) + /* Registers > 0x0800 are only available from Sharp support */ + return -EINVAL; + + 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, + const struct v4l2_dbg_register *reg) +{ + struct i2c_client *client = v4l2_get_subdevdata(sd); + + if (reg->reg < 0x400 || reg->reg > 0x1fff) + /* Registers >= 0x0800 are only available from Sharp support */ + return -EINVAL; + + if (reg_write(client, reg->reg, reg->val) < 0) + return -EIO; + + return 0; +} +#endif + +static int rj54n1_s_power(struct v4l2_subdev *sd, int on) +{ + struct i2c_client *client = v4l2_get_subdevdata(sd); + struct rj54n1 *rj54n1 = to_rj54n1(client); + + if (on) { + if (rj54n1->pwup_gpio) + gpiod_set_value(rj54n1->pwup_gpio, 1); + if (rj54n1->enable_gpio) + gpiod_set_value(rj54n1->enable_gpio, 1); + + msleep(1); + + return clk_prepare_enable(rj54n1->clk); + } + + clk_disable_unprepare(rj54n1->clk); + + if (rj54n1->enable_gpio) + gpiod_set_value(rj54n1->enable_gpio, 0); + if (rj54n1->pwup_gpio) + gpiod_set_value(rj54n1->pwup_gpio, 0); + + return 0; +} + +static int rj54n1_s_ctrl(struct v4l2_ctrl *ctrl) +{ + struct rj54n1 *rj54n1 = container_of(ctrl->handler, struct rj54n1, hdl); + struct v4l2_subdev *sd = &rj54n1->subdev; + struct i2c_client *client = v4l2_get_subdevdata(sd); + int data; + + switch (ctrl->id) { + case V4L2_CID_VFLIP: + if (ctrl->val) + 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; + return 0; + case V4L2_CID_HFLIP: + if (ctrl->val) + 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; + return 0; + case V4L2_CID_GAIN: + if (reg_write(client, RJ54N1_Y_GAIN, ctrl->val * 2) < 0) + return -EIO; + return 0; + case V4L2_CID_AUTO_WHITE_BALANCE: + /* Auto WB area - whole image */ + if (reg_set(client, RJ54N1_WB_SEL_WEIGHT_I, ctrl->val << 7, + 0x80) < 0) + return -EIO; + rj54n1->auto_wb = ctrl->val; + return 0; + } + + return -EINVAL; +} + +static const struct v4l2_ctrl_ops rj54n1_ctrl_ops = { + .s_ctrl = rj54n1_s_ctrl, +}; + +static const struct v4l2_subdev_core_ops rj54n1_subdev_core_ops = { +#ifdef CONFIG_VIDEO_ADV_DEBUG + .g_register = rj54n1_g_register, + .s_register = rj54n1_s_register, +#endif + .s_power = rj54n1_s_power, +}; + +static const struct v4l2_subdev_video_ops rj54n1_subdev_video_ops = { + .s_stream = rj54n1_s_stream, +}; + +static const struct v4l2_subdev_pad_ops rj54n1_subdev_pad_ops = { + .enum_mbus_code = rj54n1_enum_mbus_code, + .get_selection = rj54n1_get_selection, + .set_selection = rj54n1_set_selection, + .get_fmt = rj54n1_get_fmt, + .set_fmt = rj54n1_set_fmt, +}; + +static const struct v4l2_subdev_ops rj54n1_subdev_ops = { + .core = &rj54n1_subdev_core_ops, + .video = &rj54n1_subdev_video_ops, + .pad = &rj54n1_subdev_pad_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 i2c_client *client, + struct rj54n1_pdata *priv) +{ + struct rj54n1 *rj54n1 = to_rj54n1(client); + int data1, data2; + int ret; + + ret = rj54n1_s_power(&rj54n1->subdev, 1); + if (ret < 0) + return ret; + + /* 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 done; + } + + /* 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 done; + + dev_info(&client->dev, "Detected a RJ54N1CB0C chip ID 0x%x:0x%x\n", + data1, data2); + + ret = v4l2_ctrl_handler_setup(&rj54n1->hdl); + +done: + rj54n1_s_power(&rj54n1->subdev, 0); + return ret; +} + +static int rj54n1_probe(struct i2c_client *client, + const struct i2c_device_id *did) +{ + struct rj54n1 *rj54n1; + struct i2c_adapter *adapter = client->adapter; + struct rj54n1_pdata *rj54n1_priv; + int ret; + + if (!client->dev.platform_data) { + dev_err(&client->dev, "RJ54N1CB0C: missing platform data!\n"); + return -EINVAL; + } + + rj54n1_priv = client->dev.platform_data; + + 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 = devm_kzalloc(&client->dev, sizeof(struct rj54n1), GFP_KERNEL); + if (!rj54n1) + return -ENOMEM; + + v4l2_i2c_subdev_init(&rj54n1->subdev, client, &rj54n1_subdev_ops); + v4l2_ctrl_handler_init(&rj54n1->hdl, 4); + v4l2_ctrl_new_std(&rj54n1->hdl, &rj54n1_ctrl_ops, + V4L2_CID_VFLIP, 0, 1, 1, 0); + v4l2_ctrl_new_std(&rj54n1->hdl, &rj54n1_ctrl_ops, + V4L2_CID_HFLIP, 0, 1, 1, 0); + v4l2_ctrl_new_std(&rj54n1->hdl, &rj54n1_ctrl_ops, + V4L2_CID_GAIN, 0, 127, 1, 66); + v4l2_ctrl_new_std(&rj54n1->hdl, &rj54n1_ctrl_ops, + V4L2_CID_AUTO_WHITE_BALANCE, 0, 1, 1, 1); + rj54n1->subdev.ctrl_handler = &rj54n1->hdl; + if (rj54n1->hdl.error) + return rj54n1->hdl.error; + + 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); + + rj54n1->clk = clk_get(&client->dev, NULL); + if (IS_ERR(rj54n1->clk)) { + ret = PTR_ERR(rj54n1->clk); + goto err_free_ctrl; + } + + rj54n1->pwup_gpio = gpiod_get_optional(&client->dev, "powerup", + GPIOD_OUT_LOW); + if (IS_ERR(rj54n1->pwup_gpio)) { + dev_info(&client->dev, "Unable to get GPIO \"powerup\": %ld\n", + PTR_ERR(rj54n1->pwup_gpio)); + ret = PTR_ERR(rj54n1->pwup_gpio); + goto err_clk_put; + } + + rj54n1->enable_gpio = gpiod_get_optional(&client->dev, "enable", + GPIOD_OUT_LOW); + if (IS_ERR(rj54n1->enable_gpio)) { + dev_info(&client->dev, "Unable to get GPIO \"enable\": %ld\n", + PTR_ERR(rj54n1->enable_gpio)); + ret = PTR_ERR(rj54n1->enable_gpio); + goto err_gpio_put; + } + + ret = rj54n1_video_probe(client, rj54n1_priv); + if (ret < 0) + goto err_gpio_put; + + ret = v4l2_async_register_subdev(&rj54n1->subdev); + if (ret) + goto err_gpio_put; + + return 0; + +err_gpio_put: + if (rj54n1->enable_gpio) + gpiod_put(rj54n1->enable_gpio); + + if (rj54n1->pwup_gpio) + gpiod_put(rj54n1->pwup_gpio); + +err_clk_put: + clk_put(rj54n1->clk); + +err_free_ctrl: + v4l2_ctrl_handler_free(&rj54n1->hdl); + + return ret; +} + +static int rj54n1_remove(struct i2c_client *client) +{ + struct rj54n1 *rj54n1 = to_rj54n1(client); + + if (rj54n1->enable_gpio) + gpiod_put(rj54n1->enable_gpio); + if (rj54n1->pwup_gpio) + gpiod_put(rj54n1->pwup_gpio); + + clk_put(rj54n1->clk); + v4l2_ctrl_handler_free(&rj54n1->hdl); + v4l2_async_unregister_subdev(&rj54n1->subdev); + + 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, +}; + +module_i2c_driver(rj54n1_i2c_driver); + +MODULE_DESCRIPTION("Sharp RJ54N1CB0C Camera driver"); +MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>"); +MODULE_LICENSE("GPL v2"); |