2 * Driver for RJ54N1CB0C CMOS Image Sensor from Sharp
4 * Copyright (C) 2009, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
11 #include <linux/delay.h>
12 #include <linux/i2c.h>
13 #include <linux/slab.h>
14 #include <linux/v4l2-mediabus.h>
15 #include <linux/videodev2.h>
16 #include <linux/module.h>
18 #include <media/rj54n1cb0c.h>
19 #include <media/soc_camera.h>
20 #include <media/v4l2-clk.h>
21 #include <media/v4l2-subdev.h>
22 #include <media/v4l2-ctrls.h>
24 #define RJ54N1_DEV_CODE 0x0400
25 #define RJ54N1_DEV_CODE2 0x0401
26 #define RJ54N1_OUT_SEL 0x0403
27 #define RJ54N1_XY_OUTPUT_SIZE_S_H 0x0404
28 #define RJ54N1_X_OUTPUT_SIZE_S_L 0x0405
29 #define RJ54N1_Y_OUTPUT_SIZE_S_L 0x0406
30 #define RJ54N1_XY_OUTPUT_SIZE_P_H 0x0407
31 #define RJ54N1_X_OUTPUT_SIZE_P_L 0x0408
32 #define RJ54N1_Y_OUTPUT_SIZE_P_L 0x0409
33 #define RJ54N1_LINE_LENGTH_PCK_S_H 0x040a
34 #define RJ54N1_LINE_LENGTH_PCK_S_L 0x040b
35 #define RJ54N1_LINE_LENGTH_PCK_P_H 0x040c
36 #define RJ54N1_LINE_LENGTH_PCK_P_L 0x040d
37 #define RJ54N1_RESIZE_N 0x040e
38 #define RJ54N1_RESIZE_N_STEP 0x040f
39 #define RJ54N1_RESIZE_STEP 0x0410
40 #define RJ54N1_RESIZE_HOLD_H 0x0411
41 #define RJ54N1_RESIZE_HOLD_L 0x0412
42 #define RJ54N1_H_OBEN_OFS 0x0413
43 #define RJ54N1_V_OBEN_OFS 0x0414
44 #define RJ54N1_RESIZE_CONTROL 0x0415
45 #define RJ54N1_STILL_CONTROL 0x0417
46 #define RJ54N1_INC_USE_SEL_H 0x0425
47 #define RJ54N1_INC_USE_SEL_L 0x0426
48 #define RJ54N1_MIRROR_STILL_MODE 0x0427
49 #define RJ54N1_INIT_START 0x0428
50 #define RJ54N1_SCALE_1_2_LEV 0x0429
51 #define RJ54N1_SCALE_4_LEV 0x042a
52 #define RJ54N1_Y_GAIN 0x04d8
53 #define RJ54N1_APT_GAIN_UP 0x04fa
54 #define RJ54N1_RA_SEL_UL 0x0530
55 #define RJ54N1_BYTE_SWAP 0x0531
56 #define RJ54N1_OUT_SIGPO 0x053b
57 #define RJ54N1_WB_SEL_WEIGHT_I 0x054e
58 #define RJ54N1_BIT8_WB 0x0569
59 #define RJ54N1_HCAPS_WB 0x056a
60 #define RJ54N1_VCAPS_WB 0x056b
61 #define RJ54N1_HCAPE_WB 0x056c
62 #define RJ54N1_VCAPE_WB 0x056d
63 #define RJ54N1_EXPOSURE_CONTROL 0x058c
64 #define RJ54N1_FRAME_LENGTH_S_H 0x0595
65 #define RJ54N1_FRAME_LENGTH_S_L 0x0596
66 #define RJ54N1_FRAME_LENGTH_P_H 0x0597
67 #define RJ54N1_FRAME_LENGTH_P_L 0x0598
68 #define RJ54N1_PEAK_H 0x05b7
69 #define RJ54N1_PEAK_50 0x05b8
70 #define RJ54N1_PEAK_60 0x05b9
71 #define RJ54N1_PEAK_DIFF 0x05ba
72 #define RJ54N1_IOC 0x05ef
73 #define RJ54N1_TG_BYPASS 0x0700
74 #define RJ54N1_PLL_L 0x0701
75 #define RJ54N1_PLL_N 0x0702
76 #define RJ54N1_PLL_EN 0x0704
77 #define RJ54N1_RATIO_TG 0x0706
78 #define RJ54N1_RATIO_T 0x0707
79 #define RJ54N1_RATIO_R 0x0708
80 #define RJ54N1_RAMP_TGCLK_EN 0x0709
81 #define RJ54N1_OCLK_DSP 0x0710
82 #define RJ54N1_RATIO_OP 0x0711
83 #define RJ54N1_RATIO_O 0x0712
84 #define RJ54N1_OCLK_SEL_EN 0x0713
85 #define RJ54N1_CLK_RST 0x0717
86 #define RJ54N1_RESET_STANDBY 0x0718
87 #define RJ54N1_FWFLG 0x07fe
89 #define E_EXCLK (1 << 7)
90 #define SOFT_STDBY (1 << 4)
91 #define SEN_RSTX (1 << 2)
92 #define TG_RSTX (1 << 1)
93 #define DSP_RSTX (1 << 0)
95 #define RESIZE_HOLD_SEL (1 << 2)
96 #define RESIZE_GO (1 << 1)
99 * When cropping, the camera automatically centers the cropped region, there
100 * doesn't seem to be a way to specify an explicit location of the rectangle.
102 #define RJ54N1_COLUMN_SKIP 0
103 #define RJ54N1_ROW_SKIP 0
104 #define RJ54N1_MAX_WIDTH 1600
105 #define RJ54N1_MAX_HEIGHT 1200
110 /* I2C addresses: 0x50, 0x51, 0x60, 0x61 */
112 /* RJ54N1CB0C has only one fixed colorspace per pixelcode */
113 struct rj54n1_datafmt {
115 enum v4l2_colorspace colorspace;
118 /* Find a data format by a pixel code in an array */
119 static const struct rj54n1_datafmt *rj54n1_find_datafmt(
120 u32 code, const struct rj54n1_datafmt *fmt,
124 for (i = 0; i < n; i++)
125 if (fmt[i].code == code)
131 static const struct rj54n1_datafmt rj54n1_colour_fmts[] = {
132 {MEDIA_BUS_FMT_YUYV8_2X8, V4L2_COLORSPACE_JPEG},
133 {MEDIA_BUS_FMT_YVYU8_2X8, V4L2_COLORSPACE_JPEG},
134 {MEDIA_BUS_FMT_RGB565_2X8_LE, V4L2_COLORSPACE_SRGB},
135 {MEDIA_BUS_FMT_RGB565_2X8_BE, V4L2_COLORSPACE_SRGB},
136 {MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_LE, V4L2_COLORSPACE_SRGB},
137 {MEDIA_BUS_FMT_SBGGR10_2X8_PADLO_LE, V4L2_COLORSPACE_SRGB},
138 {MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_BE, V4L2_COLORSPACE_SRGB},
139 {MEDIA_BUS_FMT_SBGGR10_2X8_PADLO_BE, V4L2_COLORSPACE_SRGB},
140 {MEDIA_BUS_FMT_SBGGR10_1X10, V4L2_COLORSPACE_SRGB},
143 struct rj54n1_clock_div {
144 u8 ratio_tg; /* can be 0 or an odd number */
152 struct v4l2_subdev subdev;
153 struct v4l2_ctrl_handler hdl;
154 struct v4l2_clk *clk;
155 struct rj54n1_clock_div clk_div;
156 const struct rj54n1_datafmt *fmt;
157 struct v4l2_rect rect; /* Sensor window */
158 unsigned int tgclk_mhz;
160 unsigned short width; /* Output window */
161 unsigned short height;
162 unsigned short resize; /* Sensor * 1024 / resize = Output */
163 unsigned short scale;
167 struct rj54n1_reg_val {
172 static const struct rj54n1_reg_val bank_4[] = {
193 static const struct rj54n1_reg_val bank_5[] = {
214 static const struct rj54n1_reg_val bank_7[] = {
222 static const struct rj54n1_reg_val bank_8[] = {
410 static const struct rj54n1_reg_val bank_10[] = {
414 /* Clock dividers - these are default register values, divider = register + 1 */
415 static const struct rj54n1_clock_div clk_div = {
416 .ratio_tg = 3 /* default: 5 */,
417 .ratio_t = 4 /* default: 1 */,
418 .ratio_r = 4 /* default: 0 */,
419 .ratio_op = 1 /* default: 5 */,
420 .ratio_o = 9 /* default: 0 */,
423 static struct rj54n1 *to_rj54n1(const struct i2c_client *client)
425 return container_of(i2c_get_clientdata(client), struct rj54n1, subdev);
428 static int reg_read(struct i2c_client *client, const u16 reg)
430 struct rj54n1 *rj54n1 = to_rj54n1(client);
434 if (rj54n1->bank != reg >> 8) {
435 dev_dbg(&client->dev, "[0x%x] = 0x%x\n", 0xff, reg >> 8);
436 ret = i2c_smbus_write_byte_data(client, 0xff, reg >> 8);
439 rj54n1->bank = reg >> 8;
441 return i2c_smbus_read_byte_data(client, reg & 0xff);
444 static int reg_write(struct i2c_client *client, const u16 reg,
447 struct rj54n1 *rj54n1 = to_rj54n1(client);
451 if (rj54n1->bank != reg >> 8) {
452 dev_dbg(&client->dev, "[0x%x] = 0x%x\n", 0xff, reg >> 8);
453 ret = i2c_smbus_write_byte_data(client, 0xff, reg >> 8);
456 rj54n1->bank = reg >> 8;
458 dev_dbg(&client->dev, "[0x%x] = 0x%x\n", reg & 0xff, data);
459 return i2c_smbus_write_byte_data(client, reg & 0xff, data);
462 static int reg_set(struct i2c_client *client, const u16 reg,
463 const u8 data, const u8 mask)
467 ret = reg_read(client, reg);
470 return reg_write(client, reg, (ret & ~mask) | (data & mask));
473 static int reg_write_multiple(struct i2c_client *client,
474 const struct rj54n1_reg_val *rv, const int n)
478 for (i = 0; i < n; i++) {
479 ret = reg_write(client, rv->reg, rv->val);
488 static int rj54n1_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
491 if (index >= ARRAY_SIZE(rj54n1_colour_fmts))
494 *code = rj54n1_colour_fmts[index].code;
498 static int rj54n1_s_stream(struct v4l2_subdev *sd, int enable)
500 struct i2c_client *client = v4l2_get_subdevdata(sd);
502 /* Switch between preview and still shot modes */
503 return reg_set(client, RJ54N1_STILL_CONTROL, (!enable) << 7, 0x80);
506 static int rj54n1_set_rect(struct i2c_client *client,
507 u16 reg_x, u16 reg_y, u16 reg_xy,
508 u32 width, u32 height)
512 ret = reg_write(client, reg_xy,
513 ((width >> 4) & 0x70) |
514 ((height >> 8) & 7));
517 ret = reg_write(client, reg_x, width & 0xff);
519 ret = reg_write(client, reg_y, height & 0xff);
525 * Some commands, specifically certain initialisation sequences, require
526 * a commit operation.
528 static int rj54n1_commit(struct i2c_client *client)
530 int ret = reg_write(client, RJ54N1_INIT_START, 1);
533 ret = reg_write(client, RJ54N1_INIT_START, 0);
537 static int rj54n1_sensor_scale(struct v4l2_subdev *sd, s32 *in_w, s32 *in_h,
538 s32 *out_w, s32 *out_h);
540 static int rj54n1_s_crop(struct v4l2_subdev *sd, const struct v4l2_crop *a)
542 struct i2c_client *client = v4l2_get_subdevdata(sd);
543 struct rj54n1 *rj54n1 = to_rj54n1(client);
544 const struct v4l2_rect *rect = &a->c;
545 int dummy = 0, output_w, output_h,
546 input_w = rect->width, input_h = rect->height;
549 /* arbitrary minimum width and height, edges unimportant */
550 soc_camera_limit_side(&dummy, &input_w,
551 RJ54N1_COLUMN_SKIP, 8, RJ54N1_MAX_WIDTH);
553 soc_camera_limit_side(&dummy, &input_h,
554 RJ54N1_ROW_SKIP, 8, RJ54N1_MAX_HEIGHT);
556 output_w = (input_w * 1024 + rj54n1->resize / 2) / rj54n1->resize;
557 output_h = (input_h * 1024 + rj54n1->resize / 2) / rj54n1->resize;
559 dev_dbg(&client->dev, "Scaling for %dx%d : %u = %dx%d\n",
560 input_w, input_h, rj54n1->resize, output_w, output_h);
562 ret = rj54n1_sensor_scale(sd, &input_w, &input_h, &output_w, &output_h);
566 rj54n1->width = output_w;
567 rj54n1->height = output_h;
568 rj54n1->resize = ret;
569 rj54n1->rect.width = input_w;
570 rj54n1->rect.height = input_h;
575 static int rj54n1_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
577 struct i2c_client *client = v4l2_get_subdevdata(sd);
578 struct rj54n1 *rj54n1 = to_rj54n1(client);
581 a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
586 static int rj54n1_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
588 a->bounds.left = RJ54N1_COLUMN_SKIP;
589 a->bounds.top = RJ54N1_ROW_SKIP;
590 a->bounds.width = RJ54N1_MAX_WIDTH;
591 a->bounds.height = RJ54N1_MAX_HEIGHT;
592 a->defrect = a->bounds;
593 a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
594 a->pixelaspect.numerator = 1;
595 a->pixelaspect.denominator = 1;
600 static int rj54n1_g_fmt(struct v4l2_subdev *sd,
601 struct v4l2_mbus_framefmt *mf)
603 struct i2c_client *client = v4l2_get_subdevdata(sd);
604 struct rj54n1 *rj54n1 = to_rj54n1(client);
606 mf->code = rj54n1->fmt->code;
607 mf->colorspace = rj54n1->fmt->colorspace;
608 mf->field = V4L2_FIELD_NONE;
609 mf->width = rj54n1->width;
610 mf->height = rj54n1->height;
616 * The actual geometry configuration routine. It scales the input window into
617 * the output one, updates the window sizes and returns an error or the resize
618 * coefficient on success. Note: we only use the "Fixed Scaling" on this camera.
620 static int rj54n1_sensor_scale(struct v4l2_subdev *sd, s32 *in_w, s32 *in_h,
621 s32 *out_w, s32 *out_h)
623 struct i2c_client *client = v4l2_get_subdevdata(sd);
624 struct rj54n1 *rj54n1 = to_rj54n1(client);
625 unsigned int skip, resize, input_w = *in_w, input_h = *in_h,
626 output_w = *out_w, output_h = *out_h;
627 u16 inc_sel, wb_bit8, wb_left, wb_right, wb_top, wb_bottom;
628 unsigned int peak, peak_50, peak_60;
632 * We have a problem with crops, where the window is larger than 512x384
633 * and output window is larger than a half of the input one. In this
634 * case we have to either reduce the input window to equal or below
635 * 512x384 or the output window to equal or below 1/2 of the input.
637 if (output_w > max(512U, input_w / 2)) {
638 if (2 * output_w > RJ54N1_MAX_WIDTH) {
639 input_w = RJ54N1_MAX_WIDTH;
640 output_w = RJ54N1_MAX_WIDTH / 2;
642 input_w = output_w * 2;
645 dev_dbg(&client->dev, "Adjusted output width: in %u, out %u\n",
649 if (output_h > max(384U, input_h / 2)) {
650 if (2 * output_h > RJ54N1_MAX_HEIGHT) {
651 input_h = RJ54N1_MAX_HEIGHT;
652 output_h = RJ54N1_MAX_HEIGHT / 2;
654 input_h = output_h * 2;
657 dev_dbg(&client->dev, "Adjusted output height: in %u, out %u\n",
661 /* Idea: use the read mode for snapshots, handle separate geometries */
662 ret = rj54n1_set_rect(client, RJ54N1_X_OUTPUT_SIZE_S_L,
663 RJ54N1_Y_OUTPUT_SIZE_S_L,
664 RJ54N1_XY_OUTPUT_SIZE_S_H, output_w, output_h);
666 ret = rj54n1_set_rect(client, RJ54N1_X_OUTPUT_SIZE_P_L,
667 RJ54N1_Y_OUTPUT_SIZE_P_L,
668 RJ54N1_XY_OUTPUT_SIZE_P_H, output_w, output_h);
673 if (output_w > input_w && output_h > input_h) {
679 unsigned int resize_x, resize_y;
680 resize_x = (input_w * 1024 + output_w / 2) / output_w;
681 resize_y = (input_h * 1024 + output_h / 2) / output_h;
683 /* We want max(resize_x, resize_y), check if it still fits */
684 if (resize_x > resize_y &&
685 (output_h * resize_x + 512) / 1024 > RJ54N1_MAX_HEIGHT)
686 resize = (RJ54N1_MAX_HEIGHT * 1024 + output_h / 2) /
688 else if (resize_y > resize_x &&
689 (output_w * resize_y + 512) / 1024 > RJ54N1_MAX_WIDTH)
690 resize = (RJ54N1_MAX_WIDTH * 1024 + output_w / 2) /
693 resize = max(resize_x, resize_y);
695 /* Prohibited value ranges */
706 case 16320 ... 16384:
712 ret = reg_write(client, RJ54N1_RESIZE_HOLD_L, resize & 0xff);
714 ret = reg_write(client, RJ54N1_RESIZE_HOLD_H, resize >> 8);
720 * Configure a skipping bitmask. The sensor will select a skipping value
721 * among set bits automatically. This is very unclear in the datasheet
722 * too. I was told, in this register one enables all skipping values,
723 * that are required for a specific resize, and the camera selects
724 * automatically, which ones to use. But it is unclear how to identify,
725 * which cropping values are needed. Secondly, why don't we just set all
726 * bits and let the camera choose? Would it increase processing time and
727 * reduce the framerate? Using 0xfffc for INC_USE_SEL doesn't seem to
728 * improve the image quality or stability for larger frames (see comment
729 * above), but I didn't check the framerate.
731 skip = min(resize / 1024, 15U);
737 else if (resize & 1023 && skip < 15)
738 inc_sel |= 1 << (skip + 1);
740 ret = reg_write(client, RJ54N1_INC_USE_SEL_L, inc_sel & 0xfc);
742 ret = reg_write(client, RJ54N1_INC_USE_SEL_H, inc_sel >> 8);
744 if (!rj54n1->auto_wb) {
745 /* Auto white balance window */
746 wb_left = output_w / 16;
747 wb_right = (3 * output_w / 4 - 3) / 4;
748 wb_top = output_h / 16;
749 wb_bottom = (3 * output_h / 4 - 3) / 4;
750 wb_bit8 = ((wb_left >> 2) & 0x40) | ((wb_top >> 4) & 0x10) |
751 ((wb_right >> 6) & 4) | ((wb_bottom >> 8) & 1);
754 ret = reg_write(client, RJ54N1_BIT8_WB, wb_bit8);
756 ret = reg_write(client, RJ54N1_HCAPS_WB, wb_left);
758 ret = reg_write(client, RJ54N1_VCAPS_WB, wb_top);
760 ret = reg_write(client, RJ54N1_HCAPE_WB, wb_right);
762 ret = reg_write(client, RJ54N1_VCAPE_WB, wb_bottom);
766 peak = 12 * RJ54N1_MAX_WIDTH * (1 << 14) * resize / rj54n1->tgclk_mhz /
772 ret = reg_write(client, RJ54N1_PEAK_H,
773 ((peak_50 >> 4) & 0xf0) | (peak_60 >> 8));
775 ret = reg_write(client, RJ54N1_PEAK_50, peak_50);
777 ret = reg_write(client, RJ54N1_PEAK_60, peak_60);
779 ret = reg_write(client, RJ54N1_PEAK_DIFF, peak / 150);
783 ret = reg_write(client, RJ54N1_RESIZE_CONTROL,
784 RESIZE_HOLD_SEL | RESIZE_GO | 1);
789 /* Constant taken from manufacturer's example */
792 ret = reg_write(client, RJ54N1_RESIZE_CONTROL, RESIZE_HOLD_SEL | 1);
796 *in_w = (output_w * resize + 512) / 1024;
797 *in_h = (output_h * resize + 512) / 1024;
801 dev_dbg(&client->dev, "Scaled for %dx%d : %u = %ux%u, skip %u\n",
802 *in_w, *in_h, resize, output_w, output_h, skip);
807 static int rj54n1_set_clock(struct i2c_client *client)
809 struct rj54n1 *rj54n1 = to_rj54n1(client);
812 /* Enable external clock */
813 ret = reg_write(client, RJ54N1_RESET_STANDBY, E_EXCLK | SOFT_STDBY);
814 /* Leave stand-by. Note: use this when implementing suspend / resume */
816 ret = reg_write(client, RJ54N1_RESET_STANDBY, E_EXCLK);
819 ret = reg_write(client, RJ54N1_PLL_L, PLL_L);
821 ret = reg_write(client, RJ54N1_PLL_N, PLL_N);
825 ret = reg_write(client, RJ54N1_RATIO_TG,
826 rj54n1->clk_div.ratio_tg);
828 ret = reg_write(client, RJ54N1_RATIO_T,
829 rj54n1->clk_div.ratio_t);
831 ret = reg_write(client, RJ54N1_RATIO_R,
832 rj54n1->clk_div.ratio_r);
834 /* Enable TGCLK & RAMP */
836 ret = reg_write(client, RJ54N1_RAMP_TGCLK_EN, 3);
838 /* Disable clock output */
840 ret = reg_write(client, RJ54N1_OCLK_DSP, 0);
844 ret = reg_write(client, RJ54N1_RATIO_OP,
845 rj54n1->clk_div.ratio_op);
847 ret = reg_write(client, RJ54N1_RATIO_O,
848 rj54n1->clk_div.ratio_o);
852 ret = reg_write(client, RJ54N1_OCLK_SEL_EN, 1);
854 /* Use PLL for Timing Generator, write 2 to reserved bits */
856 ret = reg_write(client, RJ54N1_TG_BYPASS, 2);
858 /* Take sensor out of reset */
860 ret = reg_write(client, RJ54N1_RESET_STANDBY,
864 ret = reg_write(client, RJ54N1_PLL_EN, 1);
866 /* Wait for PLL to stabilise */
869 /* Enable clock to frequency divider */
871 ret = reg_write(client, RJ54N1_CLK_RST, 1);
874 ret = reg_read(client, RJ54N1_CLK_RST);
876 dev_err(&client->dev,
877 "Resetting RJ54N1CB0C clock failed: %d!\n", ret);
882 ret = reg_set(client, RJ54N1_OCLK_DSP, 1, 1);
886 ret = reg_write(client, RJ54N1_OCLK_SEL_EN, 1);
891 static int rj54n1_reg_init(struct i2c_client *client)
893 struct rj54n1 *rj54n1 = to_rj54n1(client);
894 int ret = rj54n1_set_clock(client);
897 ret = reg_write_multiple(client, bank_7, ARRAY_SIZE(bank_7));
899 ret = reg_write_multiple(client, bank_10, ARRAY_SIZE(bank_10));
901 /* Set binning divisors */
903 ret = reg_write(client, RJ54N1_SCALE_1_2_LEV, 3 | (7 << 4));
905 ret = reg_write(client, RJ54N1_SCALE_4_LEV, 0xf);
907 /* Switch to fixed resize mode */
909 ret = reg_write(client, RJ54N1_RESIZE_CONTROL,
910 RESIZE_HOLD_SEL | 1);
914 ret = reg_write(client, RJ54N1_Y_GAIN, 0x84);
917 * Mirror the image back: default is upside down and left-to-right...
918 * Set manual preview / still shot switching
921 ret = reg_write(client, RJ54N1_MIRROR_STILL_MODE, 0x27);
924 ret = reg_write_multiple(client, bank_4, ARRAY_SIZE(bank_4));
926 /* Auto exposure area */
928 ret = reg_write(client, RJ54N1_EXPOSURE_CONTROL, 0x80);
929 /* Check current auto WB config */
931 ret = reg_read(client, RJ54N1_WB_SEL_WEIGHT_I);
933 rj54n1->auto_wb = ret & 0x80;
934 ret = reg_write_multiple(client, bank_5, ARRAY_SIZE(bank_5));
937 ret = reg_write_multiple(client, bank_8, ARRAY_SIZE(bank_8));
940 ret = reg_write(client, RJ54N1_RESET_STANDBY,
941 E_EXCLK | DSP_RSTX | SEN_RSTX);
945 ret = rj54n1_commit(client);
947 /* Take DSP, TG, sensor out of reset */
949 ret = reg_write(client, RJ54N1_RESET_STANDBY,
950 E_EXCLK | DSP_RSTX | TG_RSTX | SEN_RSTX);
952 /* Start register update? Same register as 0x?FE in many bank_* sets */
954 ret = reg_write(client, RJ54N1_FWFLG, 2);
956 /* Constant taken from manufacturer's example */
962 static int rj54n1_try_fmt(struct v4l2_subdev *sd,
963 struct v4l2_mbus_framefmt *mf)
965 struct i2c_client *client = v4l2_get_subdevdata(sd);
966 struct rj54n1 *rj54n1 = to_rj54n1(client);
967 const struct rj54n1_datafmt *fmt;
968 int align = mf->code == MEDIA_BUS_FMT_SBGGR10_1X10 ||
969 mf->code == MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_BE ||
970 mf->code == MEDIA_BUS_FMT_SBGGR10_2X8_PADLO_BE ||
971 mf->code == MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_LE ||
972 mf->code == MEDIA_BUS_FMT_SBGGR10_2X8_PADLO_LE;
974 dev_dbg(&client->dev, "%s: code = %d, width = %u, height = %u\n",
975 __func__, mf->code, mf->width, mf->height);
977 fmt = rj54n1_find_datafmt(mf->code, rj54n1_colour_fmts,
978 ARRAY_SIZE(rj54n1_colour_fmts));
981 mf->code = fmt->code;
984 mf->field = V4L2_FIELD_NONE;
985 mf->colorspace = fmt->colorspace;
987 v4l_bound_align_image(&mf->width, 112, RJ54N1_MAX_WIDTH, align,
988 &mf->height, 84, RJ54N1_MAX_HEIGHT, align, 0);
993 static int rj54n1_s_fmt(struct v4l2_subdev *sd,
994 struct v4l2_mbus_framefmt *mf)
996 struct i2c_client *client = v4l2_get_subdevdata(sd);
997 struct rj54n1 *rj54n1 = to_rj54n1(client);
998 const struct rj54n1_datafmt *fmt;
999 int output_w, output_h, max_w, max_h,
1000 input_w = rj54n1->rect.width, input_h = rj54n1->rect.height;
1004 * The host driver can call us without .try_fmt(), so, we have to take
1007 rj54n1_try_fmt(sd, mf);
1010 * Verify if the sensor has just been powered on. TODO: replace this
1011 * with proper PM, when a suitable API is available.
1013 ret = reg_read(client, RJ54N1_RESET_STANDBY);
1017 if (!(ret & E_EXCLK)) {
1018 ret = rj54n1_reg_init(client);
1023 dev_dbg(&client->dev, "%s: code = %d, width = %u, height = %u\n",
1024 __func__, mf->code, mf->width, mf->height);
1026 /* RA_SEL_UL is only relevant for raw modes, ignored otherwise. */
1028 case MEDIA_BUS_FMT_YUYV8_2X8:
1029 ret = reg_write(client, RJ54N1_OUT_SEL, 0);
1031 ret = reg_set(client, RJ54N1_BYTE_SWAP, 8, 8);
1033 case MEDIA_BUS_FMT_YVYU8_2X8:
1034 ret = reg_write(client, RJ54N1_OUT_SEL, 0);
1036 ret = reg_set(client, RJ54N1_BYTE_SWAP, 0, 8);
1038 case MEDIA_BUS_FMT_RGB565_2X8_LE:
1039 ret = reg_write(client, RJ54N1_OUT_SEL, 0x11);
1041 ret = reg_set(client, RJ54N1_BYTE_SWAP, 8, 8);
1043 case MEDIA_BUS_FMT_RGB565_2X8_BE:
1044 ret = reg_write(client, RJ54N1_OUT_SEL, 0x11);
1046 ret = reg_set(client, RJ54N1_BYTE_SWAP, 0, 8);
1048 case MEDIA_BUS_FMT_SBGGR10_2X8_PADLO_LE:
1049 ret = reg_write(client, RJ54N1_OUT_SEL, 4);
1051 ret = reg_set(client, RJ54N1_BYTE_SWAP, 8, 8);
1053 ret = reg_write(client, RJ54N1_RA_SEL_UL, 0);
1055 case MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_LE:
1056 ret = reg_write(client, RJ54N1_OUT_SEL, 4);
1058 ret = reg_set(client, RJ54N1_BYTE_SWAP, 8, 8);
1060 ret = reg_write(client, RJ54N1_RA_SEL_UL, 8);
1062 case MEDIA_BUS_FMT_SBGGR10_2X8_PADLO_BE:
1063 ret = reg_write(client, RJ54N1_OUT_SEL, 4);
1065 ret = reg_set(client, RJ54N1_BYTE_SWAP, 0, 8);
1067 ret = reg_write(client, RJ54N1_RA_SEL_UL, 0);
1069 case MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_BE:
1070 ret = reg_write(client, RJ54N1_OUT_SEL, 4);
1072 ret = reg_set(client, RJ54N1_BYTE_SWAP, 0, 8);
1074 ret = reg_write(client, RJ54N1_RA_SEL_UL, 8);
1076 case MEDIA_BUS_FMT_SBGGR10_1X10:
1077 ret = reg_write(client, RJ54N1_OUT_SEL, 5);
1083 /* Special case: a raw mode with 10 bits of data per clock tick */
1085 ret = reg_set(client, RJ54N1_OCLK_SEL_EN,
1086 (mf->code == MEDIA_BUS_FMT_SBGGR10_1X10) << 1, 2);
1091 /* Supported scales 1:1 >= scale > 1:16 */
1092 max_w = mf->width * (16 * 1024 - 1) / 1024;
1093 if (input_w > max_w)
1095 max_h = mf->height * (16 * 1024 - 1) / 1024;
1096 if (input_h > max_h)
1099 output_w = mf->width;
1100 output_h = mf->height;
1102 ret = rj54n1_sensor_scale(sd, &input_w, &input_h, &output_w, &output_h);
1106 fmt = rj54n1_find_datafmt(mf->code, rj54n1_colour_fmts,
1107 ARRAY_SIZE(rj54n1_colour_fmts));
1110 rj54n1->resize = ret;
1111 rj54n1->rect.width = input_w;
1112 rj54n1->rect.height = input_h;
1113 rj54n1->width = output_w;
1114 rj54n1->height = output_h;
1116 mf->width = output_w;
1117 mf->height = output_h;
1118 mf->field = V4L2_FIELD_NONE;
1119 mf->colorspace = fmt->colorspace;
1124 #ifdef CONFIG_VIDEO_ADV_DEBUG
1125 static int rj54n1_g_register(struct v4l2_subdev *sd,
1126 struct v4l2_dbg_register *reg)
1128 struct i2c_client *client = v4l2_get_subdevdata(sd);
1130 if (reg->reg < 0x400 || reg->reg > 0x1fff)
1131 /* Registers > 0x0800 are only available from Sharp support */
1135 reg->val = reg_read(client, reg->reg);
1137 if (reg->val > 0xff)
1143 static int rj54n1_s_register(struct v4l2_subdev *sd,
1144 const struct v4l2_dbg_register *reg)
1146 struct i2c_client *client = v4l2_get_subdevdata(sd);
1148 if (reg->reg < 0x400 || reg->reg > 0x1fff)
1149 /* Registers >= 0x0800 are only available from Sharp support */
1152 if (reg_write(client, reg->reg, reg->val) < 0)
1159 static int rj54n1_s_power(struct v4l2_subdev *sd, int on)
1161 struct i2c_client *client = v4l2_get_subdevdata(sd);
1162 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
1163 struct rj54n1 *rj54n1 = to_rj54n1(client);
1165 return soc_camera_set_power(&client->dev, ssdd, rj54n1->clk, on);
1168 static int rj54n1_s_ctrl(struct v4l2_ctrl *ctrl)
1170 struct rj54n1 *rj54n1 = container_of(ctrl->handler, struct rj54n1, hdl);
1171 struct v4l2_subdev *sd = &rj54n1->subdev;
1172 struct i2c_client *client = v4l2_get_subdevdata(sd);
1176 case V4L2_CID_VFLIP:
1178 data = reg_set(client, RJ54N1_MIRROR_STILL_MODE, 0, 1);
1180 data = reg_set(client, RJ54N1_MIRROR_STILL_MODE, 1, 1);
1184 case V4L2_CID_HFLIP:
1186 data = reg_set(client, RJ54N1_MIRROR_STILL_MODE, 0, 2);
1188 data = reg_set(client, RJ54N1_MIRROR_STILL_MODE, 2, 2);
1193 if (reg_write(client, RJ54N1_Y_GAIN, ctrl->val * 2) < 0)
1196 case V4L2_CID_AUTO_WHITE_BALANCE:
1197 /* Auto WB area - whole image */
1198 if (reg_set(client, RJ54N1_WB_SEL_WEIGHT_I, ctrl->val << 7,
1201 rj54n1->auto_wb = ctrl->val;
1208 static const struct v4l2_ctrl_ops rj54n1_ctrl_ops = {
1209 .s_ctrl = rj54n1_s_ctrl,
1212 static struct v4l2_subdev_core_ops rj54n1_subdev_core_ops = {
1213 #ifdef CONFIG_VIDEO_ADV_DEBUG
1214 .g_register = rj54n1_g_register,
1215 .s_register = rj54n1_s_register,
1217 .s_power = rj54n1_s_power,
1220 static int rj54n1_g_mbus_config(struct v4l2_subdev *sd,
1221 struct v4l2_mbus_config *cfg)
1223 struct i2c_client *client = v4l2_get_subdevdata(sd);
1224 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
1227 V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_PCLK_SAMPLE_FALLING |
1228 V4L2_MBUS_MASTER | V4L2_MBUS_DATA_ACTIVE_HIGH |
1229 V4L2_MBUS_HSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_HIGH;
1230 cfg->type = V4L2_MBUS_PARALLEL;
1231 cfg->flags = soc_camera_apply_board_flags(ssdd, cfg);
1236 static int rj54n1_s_mbus_config(struct v4l2_subdev *sd,
1237 const struct v4l2_mbus_config *cfg)
1239 struct i2c_client *client = v4l2_get_subdevdata(sd);
1240 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
1242 /* Figures 2.5-1 to 2.5-3 - default falling pixclk edge */
1243 if (soc_camera_apply_board_flags(ssdd, cfg) &
1244 V4L2_MBUS_PCLK_SAMPLE_RISING)
1245 return reg_write(client, RJ54N1_OUT_SIGPO, 1 << 4);
1247 return reg_write(client, RJ54N1_OUT_SIGPO, 0);
1250 static struct v4l2_subdev_video_ops rj54n1_subdev_video_ops = {
1251 .s_stream = rj54n1_s_stream,
1252 .s_mbus_fmt = rj54n1_s_fmt,
1253 .g_mbus_fmt = rj54n1_g_fmt,
1254 .try_mbus_fmt = rj54n1_try_fmt,
1255 .enum_mbus_fmt = rj54n1_enum_fmt,
1256 .g_crop = rj54n1_g_crop,
1257 .s_crop = rj54n1_s_crop,
1258 .cropcap = rj54n1_cropcap,
1259 .g_mbus_config = rj54n1_g_mbus_config,
1260 .s_mbus_config = rj54n1_s_mbus_config,
1263 static struct v4l2_subdev_ops rj54n1_subdev_ops = {
1264 .core = &rj54n1_subdev_core_ops,
1265 .video = &rj54n1_subdev_video_ops,
1269 * Interface active, can use i2c. If it fails, it can indeed mean, that
1270 * this wasn't our capture interface, so, we wait for the right one
1272 static int rj54n1_video_probe(struct i2c_client *client,
1273 struct rj54n1_pdata *priv)
1275 struct rj54n1 *rj54n1 = to_rj54n1(client);
1279 ret = rj54n1_s_power(&rj54n1->subdev, 1);
1283 /* Read out the chip version register */
1284 data1 = reg_read(client, RJ54N1_DEV_CODE);
1285 data2 = reg_read(client, RJ54N1_DEV_CODE2);
1287 if (data1 != 0x51 || data2 != 0x10) {
1289 dev_info(&client->dev, "No RJ54N1CB0C found, read 0x%x:0x%x\n",
1294 /* Configure IOCTL polarity from the platform data: 0 or 1 << 7. */
1295 ret = reg_write(client, RJ54N1_IOC, priv->ioctl_high << 7);
1299 dev_info(&client->dev, "Detected a RJ54N1CB0C chip ID 0x%x:0x%x\n",
1302 ret = v4l2_ctrl_handler_setup(&rj54n1->hdl);
1305 rj54n1_s_power(&rj54n1->subdev, 0);
1309 static int rj54n1_probe(struct i2c_client *client,
1310 const struct i2c_device_id *did)
1312 struct rj54n1 *rj54n1;
1313 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
1314 struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
1315 struct rj54n1_pdata *rj54n1_priv;
1318 if (!ssdd || !ssdd->drv_priv) {
1319 dev_err(&client->dev, "RJ54N1CB0C: missing platform data!\n");
1323 rj54n1_priv = ssdd->drv_priv;
1325 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
1326 dev_warn(&adapter->dev,
1327 "I2C-Adapter doesn't support I2C_FUNC_SMBUS_BYTE\n");
1331 rj54n1 = devm_kzalloc(&client->dev, sizeof(struct rj54n1), GFP_KERNEL);
1335 v4l2_i2c_subdev_init(&rj54n1->subdev, client, &rj54n1_subdev_ops);
1336 v4l2_ctrl_handler_init(&rj54n1->hdl, 4);
1337 v4l2_ctrl_new_std(&rj54n1->hdl, &rj54n1_ctrl_ops,
1338 V4L2_CID_VFLIP, 0, 1, 1, 0);
1339 v4l2_ctrl_new_std(&rj54n1->hdl, &rj54n1_ctrl_ops,
1340 V4L2_CID_HFLIP, 0, 1, 1, 0);
1341 v4l2_ctrl_new_std(&rj54n1->hdl, &rj54n1_ctrl_ops,
1342 V4L2_CID_GAIN, 0, 127, 1, 66);
1343 v4l2_ctrl_new_std(&rj54n1->hdl, &rj54n1_ctrl_ops,
1344 V4L2_CID_AUTO_WHITE_BALANCE, 0, 1, 1, 1);
1345 rj54n1->subdev.ctrl_handler = &rj54n1->hdl;
1346 if (rj54n1->hdl.error)
1347 return rj54n1->hdl.error;
1349 rj54n1->clk_div = clk_div;
1350 rj54n1->rect.left = RJ54N1_COLUMN_SKIP;
1351 rj54n1->rect.top = RJ54N1_ROW_SKIP;
1352 rj54n1->rect.width = RJ54N1_MAX_WIDTH;
1353 rj54n1->rect.height = RJ54N1_MAX_HEIGHT;
1354 rj54n1->width = RJ54N1_MAX_WIDTH;
1355 rj54n1->height = RJ54N1_MAX_HEIGHT;
1356 rj54n1->fmt = &rj54n1_colour_fmts[0];
1357 rj54n1->resize = 1024;
1358 rj54n1->tgclk_mhz = (rj54n1_priv->mclk_freq / PLL_L * PLL_N) /
1359 (clk_div.ratio_tg + 1) / (clk_div.ratio_t + 1);
1361 rj54n1->clk = v4l2_clk_get(&client->dev, "mclk");
1362 if (IS_ERR(rj54n1->clk)) {
1363 ret = PTR_ERR(rj54n1->clk);
1367 ret = rj54n1_video_probe(client, rj54n1_priv);
1369 v4l2_clk_put(rj54n1->clk);
1371 v4l2_ctrl_handler_free(&rj54n1->hdl);
1377 static int rj54n1_remove(struct i2c_client *client)
1379 struct rj54n1 *rj54n1 = to_rj54n1(client);
1380 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
1382 v4l2_clk_put(rj54n1->clk);
1383 v4l2_device_unregister_subdev(&rj54n1->subdev);
1385 ssdd->free_bus(ssdd);
1386 v4l2_ctrl_handler_free(&rj54n1->hdl);
1391 static const struct i2c_device_id rj54n1_id[] = {
1392 { "rj54n1cb0c", 0 },
1395 MODULE_DEVICE_TABLE(i2c, rj54n1_id);
1397 static struct i2c_driver rj54n1_i2c_driver = {
1399 .name = "rj54n1cb0c",
1401 .probe = rj54n1_probe,
1402 .remove = rj54n1_remove,
1403 .id_table = rj54n1_id,
1406 module_i2c_driver(rj54n1_i2c_driver);
1408 MODULE_DESCRIPTION("Sharp RJ54N1CB0C Camera driver");
1409 MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
1410 MODULE_LICENSE("GPL v2");