rj54n1cb0c.c

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * Driver for RJ54N1CB0C CMOS Image Sensor from Sharp
   4 *
   5 * Copyright (C) 2018, Jacopo Mondi <jacopo@jmondi.org>
   6 *
   7 * Copyright (C) 2009, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
   8 */
   9
  10#include <linux/clk.h>
  11#include <linux/delay.h>
  12#include <linux/gpio/consumer.h>
  13#include <linux/i2c.h>
  14#include <linux/module.h>
  15#include <linux/slab.h>
  16#include <linux/v4l2-mediabus.h>
  17#include <linux/videodev2.h>
  18
  19#include <media/i2c/rj54n1cb0c.h>
  20#include <media/v4l2-device.h>
  21#include <media/v4l2-ctrls.h>
  22#include <media/v4l2-subdev.h>
  23
  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
  88
  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)
  94
  95#define RESIZE_HOLD_SEL			(1 << 2)
  96#define RESIZE_GO			(1 << 1)
  97
  98/*
  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.
 101 */
 102#define RJ54N1_COLUMN_SKIP		0
 103#define RJ54N1_ROW_SKIP			0
 104#define RJ54N1_MAX_WIDTH		1600
 105#define RJ54N1_MAX_HEIGHT		1200
 106
 107#define PLL_L				2
 108#define PLL_N				0x31
 109
 110/* I2C addresses: 0x50, 0x51, 0x60, 0x61 */
 111
 112/* RJ54N1CB0C has only one fixed colorspace per pixelcode */
 113struct rj54n1_datafmt {
 114	u32	code;
 115	enum v4l2_colorspace		colorspace;
 116};
 117
 118/* Find a data format by a pixel code in an array */
 119static const struct rj54n1_datafmt *rj54n1_find_datafmt(
 120	u32 code, const struct rj54n1_datafmt *fmt,
 121	int n)
 122{
 123	int i;
 124	for (i = 0; i < n; i++)
 125		if (fmt[i].code == code)
 126			return fmt + i;
 127
 128	return NULL;
 129}
 130
 131static 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},
 141};
 142
 143struct rj54n1_clock_div {
 144	u8 ratio_tg;	/* can be 0 or an odd number */
 145	u8 ratio_t;
 146	u8 ratio_r;
 147	u8 ratio_op;
 148	u8 ratio_o;
 149};
 150
 151struct rj54n1 {
 152	struct v4l2_subdev subdev;
 153	struct v4l2_ctrl_handler hdl;
 154	struct clk *clk;
 155	struct gpio_desc *pwup_gpio;
 156	struct gpio_desc *enable_gpio;
 157	struct rj54n1_clock_div clk_div;
 158	const struct rj54n1_datafmt *fmt;
 159	struct v4l2_rect rect;	/* Sensor window */
 160	unsigned int tgclk_mhz;
 161	bool auto_wb;
 162	unsigned short width;	/* Output window */
 163	unsigned short height;
 164	unsigned short resize;	/* Sensor * 1024 / resize = Output */
 165	unsigned short scale;
 166	u8 bank;
 167};
 168
 169struct rj54n1_reg_val {
 170	u16 reg;
 171	u8 val;
 172};
 173
 174static const struct rj54n1_reg_val bank_4[] = {
 175	{0x417, 0},
 176	{0x42c, 0},
 177	{0x42d, 0xf0},
 178	{0x42e, 0},
 179	{0x42f, 0x50},
 180	{0x430, 0xf5},
 181	{0x431, 0x16},
 182	{0x432, 0x20},
 183	{0x433, 0},
 184	{0x434, 0xc8},
 185	{0x43c, 8},
 186	{0x43e, 0x90},
 187	{0x445, 0x83},
 188	{0x4ba, 0x58},
 189	{0x4bb, 4},
 190	{0x4bc, 0x20},
 191	{0x4db, 4},
 192	{0x4fe, 2},
 193};
 194
 195static const struct rj54n1_reg_val bank_5[] = {
 196	{0x514, 0},
 197	{0x516, 0},
 198	{0x518, 0},
 199	{0x51a, 0},
 200	{0x51d, 0xff},
 201	{0x56f, 0x28},
 202	{0x575, 0x40},
 203	{0x5bc, 0x48},
 204	{0x5c1, 6},
 205	{0x5e5, 0x11},
 206	{0x5e6, 0x43},
 207	{0x5e7, 0x33},
 208	{0x5e8, 0x21},
 209	{0x5e9, 0x30},
 210	{0x5ea, 0x0},
 211	{0x5eb, 0xa5},
 212	{0x5ec, 0xff},
 213	{0x5fe, 2},
 214};
 215
 216static const struct rj54n1_reg_val bank_7[] = {
 217	{0x70a, 0},
 218	{0x714, 0xff},
 219	{0x715, 0xff},
 220	{0x716, 0x1f},
 221	{0x7FE, 2},
 222};
 223
 224static const struct rj54n1_reg_val bank_8[] = {
 225	{0x800, 0x00},
 226	{0x801, 0x01},
 227	{0x802, 0x61},
 228	{0x805, 0x00},
 229	{0x806, 0x00},
 230	{0x807, 0x00},
 231	{0x808, 0x00},
 232	{0x809, 0x01},
 233	{0x80A, 0x61},
 234	{0x80B, 0x00},
 235	{0x80C, 0x01},
 236	{0x80D, 0x00},
 237	{0x80E, 0x00},
 238	{0x80F, 0x00},
 239	{0x810, 0x00},
 240	{0x811, 0x01},
 241	{0x812, 0x61},
 242	{0x813, 0x00},
 243	{0x814, 0x11},
 244	{0x815, 0x00},
 245	{0x816, 0x41},
 246	{0x817, 0x00},
 247	{0x818, 0x51},
 248	{0x819, 0x01},
 249	{0x81A, 0x1F},
 250	{0x81B, 0x00},
 251	{0x81C, 0x01},
 252	{0x81D, 0x00},
 253	{0x81E, 0x11},
 254	{0x81F, 0x00},
 255	{0x820, 0x41},
 256	{0x821, 0x00},
 257	{0x822, 0x51},
 258	{0x823, 0x00},
 259	{0x824, 0x00},
 260	{0x825, 0x00},
 261	{0x826, 0x47},
 262	{0x827, 0x01},
 263	{0x828, 0x4F},
 264	{0x829, 0x00},
 265	{0x82A, 0x00},
 266	{0x82B, 0x00},
 267	{0x82C, 0x30},
 268	{0x82D, 0x00},
 269	{0x82E, 0x40},
 270	{0x82F, 0x00},
 271	{0x830, 0xB3},
 272	{0x831, 0x00},
 273	{0x832, 0xE3},
 274	{0x833, 0x00},
 275	{0x834, 0x00},
 276	{0x835, 0x00},
 277	{0x836, 0x00},
 278	{0x837, 0x00},
 279	{0x838, 0x00},
 280	{0x839, 0x01},
 281	{0x83A, 0x61},
 282	{0x83B, 0x00},
 283	{0x83C, 0x01},
 284	{0x83D, 0x00},
 285	{0x83E, 0x00},
 286	{0x83F, 0x00},
 287	{0x840, 0x00},
 288	{0x841, 0x01},
 289	{0x842, 0x61},
 290	{0x843, 0x00},
 291	{0x844, 0x1D},
 292	{0x845, 0x00},
 293	{0x846, 0x00},
 294	{0x847, 0x00},
 295	{0x848, 0x00},
 296	{0x849, 0x01},
 297	{0x84A, 0x1F},
 298	{0x84B, 0x00},
 299	{0x84C, 0x05},
 300	{0x84D, 0x00},
 301	{0x84E, 0x19},
 302	{0x84F, 0x01},
 303	{0x850, 0x21},
 304	{0x851, 0x01},
 305	{0x852, 0x5D},
 306	{0x853, 0x00},
 307	{0x854, 0x00},
 308	{0x855, 0x00},
 309	{0x856, 0x19},
 310	{0x857, 0x01},
 311	{0x858, 0x21},
 312	{0x859, 0x00},
 313	{0x85A, 0x00},
 314	{0x85B, 0x00},
 315	{0x85C, 0x00},
 316	{0x85D, 0x00},
 317	{0x85E, 0x00},
 318	{0x85F, 0x00},
 319	{0x860, 0xB3},
 320	{0x861, 0x00},
 321	{0x862, 0xE3},
 322	{0x863, 0x00},
 323	{0x864, 0x00},
 324	{0x865, 0x00},
 325	{0x866, 0x00},
 326	{0x867, 0x00},
 327	{0x868, 0x00},
 328	{0x869, 0xE2},
 329	{0x86A, 0x00},
 330	{0x86B, 0x01},
 331	{0x86C, 0x06},
 332	{0x86D, 0x00},
 333	{0x86E, 0x00},
 334	{0x86F, 0x00},
 335	{0x870, 0x60},
 336	{0x871, 0x8C},
 337	{0x872, 0x10},
 338	{0x873, 0x00},
 339	{0x874, 0xE0},
 340	{0x875, 0x00},
 341	{0x876, 0x27},
 342	{0x877, 0x01},
 343	{0x878, 0x00},
 344	{0x879, 0x00},
 345	{0x87A, 0x00},
 346	{0x87B, 0x03},
 347	{0x87C, 0x00},
 348	{0x87D, 0x00},
 349	{0x87E, 0x00},
 350	{0x87F, 0x00},
 351	{0x880, 0x00},
 352	{0x881, 0x00},
 353	{0x882, 0x00},
 354	{0x883, 0x00},
 355	{0x884, 0x00},
 356	{0x885, 0x00},
 357	{0x886, 0xF8},
 358	{0x887, 0x00},
 359	{0x888, 0x03},
 360	{0x889, 0x00},
 361	{0x88A, 0x64},
 362	{0x88B, 0x00},
 363	{0x88C, 0x03},
 364	{0x88D, 0x00},
 365	{0x88E, 0xB1},
 366	{0x88F, 0x00},
 367	{0x890, 0x03},
 368	{0x891, 0x01},
 369	{0x892, 0x1D},
 370	{0x893, 0x00},
 371	{0x894, 0x03},
 372	{0x895, 0x01},
 373	{0x896, 0x4B},
 374	{0x897, 0x00},
 375	{0x898, 0xE5},
 376	{0x899, 0x00},
 377	{0x89A, 0x01},
 378	{0x89B, 0x00},
 379	{0x89C, 0x01},
 380	{0x89D, 0x04},
 381	{0x89E, 0xC8},
 382	{0x89F, 0x00},
 383	{0x8A0, 0x01},
 384	{0x8A1, 0x01},
 385	{0x8A2, 0x61},
 386	{0x8A3, 0x00},
 387	{0x8A4, 0x01},
 388	{0x8A5, 0x00},
 389	{0x8A6, 0x00},
 390	{0x8A7, 0x00},
 391	{0x8A8, 0x00},
 392	{0x8A9, 0x00},
 393	{0x8AA, 0x7F},
 394	{0x8AB, 0x03},
 395	{0x8AC, 0x00},
 396	{0x8AD, 0x00},
 397	{0x8AE, 0x00},
 398	{0x8AF, 0x00},
 399	{0x8B0, 0x00},
 400	{0x8B1, 0x00},
 401	{0x8B6, 0x00},
 402	{0x8B7, 0x01},
 403	{0x8B8, 0x00},
 404	{0x8B9, 0x00},
 405	{0x8BA, 0x02},
 406	{0x8BB, 0x00},
 407	{0x8BC, 0xFF},
 408	{0x8BD, 0x00},
 409	{0x8FE, 2},
 410};
 411
 412static const struct rj54n1_reg_val bank_10[] = {
 413	{0x10bf, 0x69}
 414};
 415
 416/* Clock dividers - these are default register values, divider = register + 1 */
 417static const struct rj54n1_clock_div clk_div = {
 418	.ratio_tg	= 3 /* default: 5 */,
 419	.ratio_t	= 4 /* default: 1 */,
 420	.ratio_r	= 4 /* default: 0 */,
 421	.ratio_op	= 1 /* default: 5 */,
 422	.ratio_o	= 9 /* default: 0 */,
 423};
 424
 425static struct rj54n1 *to_rj54n1(const struct i2c_client *client)
 426{
 427	return container_of(i2c_get_clientdata(client), struct rj54n1, subdev);
 428}
 429
 430static int reg_read(struct i2c_client *client, const u16 reg)
 431{
 432	struct rj54n1 *rj54n1 = to_rj54n1(client);
 433	int ret;
 434
 435	/* set bank */
 436	if (rj54n1->bank != reg >> 8) {
 437		dev_dbg(&client->dev, "[0x%x] = 0x%x\n", 0xff, reg >> 8);
 438		ret = i2c_smbus_write_byte_data(client, 0xff, reg >> 8);
 439		if (ret < 0)
 440			return ret;
 441		rj54n1->bank = reg >> 8;
 442	}
 443	return i2c_smbus_read_byte_data(client, reg & 0xff);
 444}
 445
 446static int reg_write(struct i2c_client *client, const u16 reg,
 447		     const u8 data)
 448{
 449	struct rj54n1 *rj54n1 = to_rj54n1(client);
 450	int ret;
 451
 452	/* set bank */
 453	if (rj54n1->bank != reg >> 8) {
 454		dev_dbg(&client->dev, "[0x%x] = 0x%x\n", 0xff, reg >> 8);
 455		ret = i2c_smbus_write_byte_data(client, 0xff, reg >> 8);
 456		if (ret < 0)
 457			return ret;
 458		rj54n1->bank = reg >> 8;
 459	}
 460	dev_dbg(&client->dev, "[0x%x] = 0x%x\n", reg & 0xff, data);
 461	return i2c_smbus_write_byte_data(client, reg & 0xff, data);
 462}
 463
 464static int reg_set(struct i2c_client *client, const u16 reg,
 465		   const u8 data, const u8 mask)
 466{
 467	int ret;
 468
 469	ret = reg_read(client, reg);
 470	if (ret < 0)
 471		return ret;
 472	return reg_write(client, reg, (ret & ~mask) | (data & mask));
 473}
 474
 475static int reg_write_multiple(struct i2c_client *client,
 476			      const struct rj54n1_reg_val *rv, const int n)
 477{
 478	int i, ret;
 479
 480	for (i = 0; i < n; i++) {
 481		ret = reg_write(client, rv->reg, rv->val);
 482		if (ret < 0)
 483			return ret;
 484		rv++;
 485	}
 486
 487	return 0;
 488}
 489
 490static int rj54n1_enum_mbus_code(struct v4l2_subdev *sd,
 491		struct v4l2_subdev_state *sd_state,
 492		struct v4l2_subdev_mbus_code_enum *code)
 493{
 494	if (code->pad || code->index >= ARRAY_SIZE(rj54n1_colour_fmts))
 495		return -EINVAL;
 496
 497	code->code = rj54n1_colour_fmts[code->index].code;
 498	return 0;
 499}
 500
 501static int rj54n1_s_stream(struct v4l2_subdev *sd, int enable)
 502{
 503	struct i2c_client *client = v4l2_get_subdevdata(sd);
 504
 505	/* Switch between preview and still shot modes */
 506	return reg_set(client, RJ54N1_STILL_CONTROL, (!enable) << 7, 0x80);
 507}
 508
 509static int rj54n1_set_rect(struct i2c_client *client,
 510			   u16 reg_x, u16 reg_y, u16 reg_xy,
 511			   u32 width, u32 height)
 512{
 513	int ret;
 514
 515	ret = reg_write(client, reg_xy,
 516			((width >> 4) & 0x70) |
 517			((height >> 8) & 7));
 518
 519	if (!ret)
 520		ret = reg_write(client, reg_x, width & 0xff);
 521	if (!ret)
 522		ret = reg_write(client, reg_y, height & 0xff);
 523
 524	return ret;
 525}
 526
 527/*
 528 * Some commands, specifically certain initialisation sequences, require
 529 * a commit operation.
 530 */
 531static int rj54n1_commit(struct i2c_client *client)
 532{
 533	int ret = reg_write(client, RJ54N1_INIT_START, 1);
 534	msleep(10);
 535	if (!ret)
 536		ret = reg_write(client, RJ54N1_INIT_START, 0);
 537	return ret;
 538}
 539
 540static int rj54n1_sensor_scale(struct v4l2_subdev *sd, s32 *in_w, s32 *in_h,
 541			       s32 *out_w, s32 *out_h);
 542
 543static int rj54n1_set_selection(struct v4l2_subdev *sd,
 544				struct v4l2_subdev_state *sd_state,
 545				struct v4l2_subdev_selection *sel)
 546{
 547	struct i2c_client *client = v4l2_get_subdevdata(sd);
 548	struct rj54n1 *rj54n1 = to_rj54n1(client);
 549	const struct v4l2_rect *rect = &sel->r;
 550	int output_w, output_h, input_w = rect->width, input_h = rect->height;
 551	int ret;
 552
 553	if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE ||
 554	    sel->target != V4L2_SEL_TGT_CROP)
 555		return -EINVAL;
 556
 557	/* arbitrary minimum width and height, edges unimportant */
 558	v4l_bound_align_image(&input_w, 8, RJ54N1_MAX_WIDTH, 0,
 559			      &input_h, 8, RJ54N1_MAX_HEIGHT, 0, 0);
 560
 561	output_w = (input_w * 1024 + rj54n1->resize / 2) / rj54n1->resize;
 562	output_h = (input_h * 1024 + rj54n1->resize / 2) / rj54n1->resize;
 563
 564	dev_dbg(&client->dev, "Scaling for %dx%d : %u = %dx%d\n",
 565		input_w, input_h, rj54n1->resize, output_w, output_h);
 566
 567	ret = rj54n1_sensor_scale(sd, &input_w, &input_h, &output_w, &output_h);
 568	if (ret < 0)
 569		return ret;
 570
 571	rj54n1->width		= output_w;
 572	rj54n1->height		= output_h;
 573	rj54n1->resize		= ret;
 574	rj54n1->rect.width	= input_w;
 575	rj54n1->rect.height	= input_h;
 576
 577	return 0;
 578}
 579
 580static int rj54n1_get_selection(struct v4l2_subdev *sd,
 581				struct v4l2_subdev_state *sd_state,
 582				struct v4l2_subdev_selection *sel)
 583{
 584	struct i2c_client *client = v4l2_get_subdevdata(sd);
 585	struct rj54n1 *rj54n1 = to_rj54n1(client);
 586
 587	if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)
 588		return -EINVAL;
 589
 590	switch (sel->target) {
 591	case V4L2_SEL_TGT_CROP_BOUNDS:
 592		sel->r.left = RJ54N1_COLUMN_SKIP;
 593		sel->r.top = RJ54N1_ROW_SKIP;
 594		sel->r.width = RJ54N1_MAX_WIDTH;
 595		sel->r.height = RJ54N1_MAX_HEIGHT;
 596		return 0;
 597	case V4L2_SEL_TGT_CROP:
 598		sel->r = rj54n1->rect;
 599		return 0;
 600	default:
 601		return -EINVAL;
 602	}
 603}
 604
 605static int rj54n1_get_fmt(struct v4l2_subdev *sd,
 606		struct v4l2_subdev_state *sd_state,
 607		struct v4l2_subdev_format *format)
 608{
 609	struct v4l2_mbus_framefmt *mf = &format->format;
 610	struct i2c_client *client = v4l2_get_subdevdata(sd);
 611	struct rj54n1 *rj54n1 = to_rj54n1(client);
 612
 613	if (format->pad)
 614		return -EINVAL;
 615
 616	mf->code	= rj54n1->fmt->code;
 617	mf->colorspace	= rj54n1->fmt->colorspace;
 618	mf->ycbcr_enc	= V4L2_YCBCR_ENC_601;
 619	mf->xfer_func	= V4L2_XFER_FUNC_SRGB;
 620	mf->quantization = V4L2_QUANTIZATION_DEFAULT;
 621	mf->field	= V4L2_FIELD_NONE;
 622	mf->width	= rj54n1->width;
 623	mf->height	= rj54n1->height;
 624
 625	return 0;
 626}
 627
 628/*
 629 * The actual geometry configuration routine. It scales the input window into
 630 * the output one, updates the window sizes and returns an error or the resize
 631 * coefficient on success. Note: we only use the "Fixed Scaling" on this camera.
 632 */
 633static int rj54n1_sensor_scale(struct v4l2_subdev *sd, s32 *in_w, s32 *in_h,
 634			       s32 *out_w, s32 *out_h)
 635{
 636	struct i2c_client *client = v4l2_get_subdevdata(sd);
 637	struct rj54n1 *rj54n1 = to_rj54n1(client);
 638	unsigned int skip, resize, input_w = *in_w, input_h = *in_h,
 639		output_w = *out_w, output_h = *out_h;
 640	u16 inc_sel, wb_bit8, wb_left, wb_right, wb_top, wb_bottom;
 641	unsigned int peak, peak_50, peak_60;
 642	int ret;
 643
 644	/*
 645	 * We have a problem with crops, where the window is larger than 512x384
 646	 * and output window is larger than a half of the input one. In this
 647	 * case we have to either reduce the input window to equal or below
 648	 * 512x384 or the output window to equal or below 1/2 of the input.
 649	 */
 650	if (output_w > max(512U, input_w / 2)) {
 651		if (2 * output_w > RJ54N1_MAX_WIDTH) {
 652			input_w = RJ54N1_MAX_WIDTH;
 653			output_w = RJ54N1_MAX_WIDTH / 2;
 654		} else {
 655			input_w = output_w * 2;
 656		}
 657
 658		dev_dbg(&client->dev, "Adjusted output width: in %u, out %u\n",
 659			input_w, output_w);
 660	}
 661
 662	if (output_h > max(384U, input_h / 2)) {
 663		if (2 * output_h > RJ54N1_MAX_HEIGHT) {
 664			input_h = RJ54N1_MAX_HEIGHT;
 665			output_h = RJ54N1_MAX_HEIGHT / 2;
 666		} else {
 667			input_h = output_h * 2;
 668		}
 669
 670		dev_dbg(&client->dev, "Adjusted output height: in %u, out %u\n",
 671			input_h, output_h);
 672	}
 673
 674	/* Idea: use the read mode for snapshots, handle separate geometries */
 675	ret = rj54n1_set_rect(client, RJ54N1_X_OUTPUT_SIZE_S_L,
 676			      RJ54N1_Y_OUTPUT_SIZE_S_L,
 677			      RJ54N1_XY_OUTPUT_SIZE_S_H, output_w, output_h);
 678	if (!ret)
 679		ret = rj54n1_set_rect(client, RJ54N1_X_OUTPUT_SIZE_P_L,
 680			      RJ54N1_Y_OUTPUT_SIZE_P_L,
 681			      RJ54N1_XY_OUTPUT_SIZE_P_H, output_w, output_h);
 682
 683	if (ret < 0)
 684		return ret;
 685
 686	if (output_w > input_w && output_h > input_h) {
 687		input_w = output_w;
 688		input_h = output_h;
 689
 690		resize = 1024;
 691	} else {
 692		unsigned int resize_x, resize_y;
 693		resize_x = (input_w * 1024 + output_w / 2) / output_w;
 694		resize_y = (input_h * 1024 + output_h / 2) / output_h;
 695
 696		/* We want max(resize_x, resize_y), check if it still fits */
 697		if (resize_x > resize_y &&
 698		    (output_h * resize_x + 512) / 1024 > RJ54N1_MAX_HEIGHT)
 699			resize = (RJ54N1_MAX_HEIGHT * 1024 + output_h / 2) /
 700				output_h;
 701		else if (resize_y > resize_x &&
 702			 (output_w * resize_y + 512) / 1024 > RJ54N1_MAX_WIDTH)
 703			resize = (RJ54N1_MAX_WIDTH * 1024 + output_w / 2) /
 704				output_w;
 705		else
 706			resize = max(resize_x, resize_y);
 707
 708		/* Prohibited value ranges */
 709		switch (resize) {
 710		case 2040 ... 2047:
 711			resize = 2039;
 712			break;
 713		case 4080 ... 4095:
 714			resize = 4079;
 715			break;
 716		case 8160 ... 8191:
 717			resize = 8159;
 718			break;
 719		case 16320 ... 16384:
 720			resize = 16319;
 721		}
 722	}
 723
 724	/* Set scaling */
 725	ret = reg_write(client, RJ54N1_RESIZE_HOLD_L, resize & 0xff);
 726	if (!ret)
 727		ret = reg_write(client, RJ54N1_RESIZE_HOLD_H, resize >> 8);
 728
 729	if (ret < 0)
 730		return ret;
 731
 732	/*
 733	 * Configure a skipping bitmask. The sensor will select a skipping value
 734	 * among set bits automatically. This is very unclear in the datasheet
 735	 * too. I was told, in this register one enables all skipping values,
 736	 * that are required for a specific resize, and the camera selects
 737	 * automatically, which ones to use. But it is unclear how to identify,
 738	 * which cropping values are needed. Secondly, why don't we just set all
 739	 * bits and let the camera choose? Would it increase processing time and
 740	 * reduce the framerate? Using 0xfffc for INC_USE_SEL doesn't seem to
 741	 * improve the image quality or stability for larger frames (see comment
 742	 * above), but I didn't check the framerate.
 743	 */
 744	skip = min(resize / 1024, 15U);
 745
 746	inc_sel = 1 << skip;
 747
 748	if (inc_sel <= 2)
 749		inc_sel = 0xc;
 750	else if (resize & 1023 && skip < 15)
 751		inc_sel |= 1 << (skip + 1);
 752
 753	ret = reg_write(client, RJ54N1_INC_USE_SEL_L, inc_sel & 0xfc);
 754	if (!ret)
 755		ret = reg_write(client, RJ54N1_INC_USE_SEL_H, inc_sel >> 8);
 756
 757	if (!rj54n1->auto_wb) {
 758		/* Auto white balance window */
 759		wb_left	  = output_w / 16;
 760		wb_right  = (3 * output_w / 4 - 3) / 4;
 761		wb_top	  = output_h / 16;
 762		wb_bottom = (3 * output_h / 4 - 3) / 4;
 763		wb_bit8	  = ((wb_left >> 2) & 0x40) | ((wb_top >> 4) & 0x10) |
 764			((wb_right >> 6) & 4) | ((wb_bottom >> 8) & 1);
 765
 766		if (!ret)
 767			ret = reg_write(client, RJ54N1_BIT8_WB, wb_bit8);
 768		if (!ret)
 769			ret = reg_write(client, RJ54N1_HCAPS_WB, wb_left);
 770		if (!ret)
 771			ret = reg_write(client, RJ54N1_VCAPS_WB, wb_top);
 772		if (!ret)
 773			ret = reg_write(client, RJ54N1_HCAPE_WB, wb_right);
 774		if (!ret)
 775			ret = reg_write(client, RJ54N1_VCAPE_WB, wb_bottom);
 776	}
 777
 778	/* Antiflicker */
 779	peak = 12 * RJ54N1_MAX_WIDTH * (1 << 14) * resize / rj54n1->tgclk_mhz /
 780		10000;
 781	peak_50 = peak / 6;
 782	peak_60 = peak / 5;
 783
 784	if (!ret)
 785		ret = reg_write(client, RJ54N1_PEAK_H,
 786				((peak_50 >> 4) & 0xf0) | (peak_60 >> 8));
 787	if (!ret)
 788		ret = reg_write(client, RJ54N1_PEAK_50, peak_50);
 789	if (!ret)
 790		ret = reg_write(client, RJ54N1_PEAK_60, peak_60);
 791	if (!ret)
 792		ret = reg_write(client, RJ54N1_PEAK_DIFF, peak / 150);
 793
 794	/* Start resizing */
 795	if (!ret)
 796		ret = reg_write(client, RJ54N1_RESIZE_CONTROL,
 797				RESIZE_HOLD_SEL | RESIZE_GO | 1);
 798
 799	if (ret < 0)
 800		return ret;
 801
 802	/* Constant taken from manufacturer's example */
 803	msleep(230);
 804
 805	ret = reg_write(client, RJ54N1_RESIZE_CONTROL, RESIZE_HOLD_SEL | 1);
 806	if (ret < 0)
 807		return ret;
 808
 809	*in_w = (output_w * resize + 512) / 1024;
 810	*in_h = (output_h * resize + 512) / 1024;
 811	*out_w = output_w;
 812	*out_h = output_h;
 813
 814	dev_dbg(&client->dev, "Scaled for %dx%d : %u = %ux%u, skip %u\n",
 815		*in_w, *in_h, resize, output_w, output_h, skip);
 816
 817	return resize;
 818}
 819
 820static int rj54n1_set_clock(struct i2c_client *client)
 821{
 822	struct rj54n1 *rj54n1 = to_rj54n1(client);
 823	int ret;
 824
 825	/* Enable external clock */
 826	ret = reg_write(client, RJ54N1_RESET_STANDBY, E_EXCLK | SOFT_STDBY);
 827	/* Leave stand-by. Note: use this when implementing suspend / resume */
 828	if (!ret)
 829		ret = reg_write(client, RJ54N1_RESET_STANDBY, E_EXCLK);
 830
 831	if (!ret)
 832		ret = reg_write(client, RJ54N1_PLL_L, PLL_L);
 833	if (!ret)
 834		ret = reg_write(client, RJ54N1_PLL_N, PLL_N);
 835
 836	/* TGCLK dividers */
 837	if (!ret)
 838		ret = reg_write(client, RJ54N1_RATIO_TG,
 839				rj54n1->clk_div.ratio_tg);
 840	if (!ret)
 841		ret = reg_write(client, RJ54N1_RATIO_T,
 842				rj54n1->clk_div.ratio_t);
 843	if (!ret)
 844		ret = reg_write(client, RJ54N1_RATIO_R,
 845				rj54n1->clk_div.ratio_r);
 846
 847	/* Enable TGCLK & RAMP */
 848	if (!ret)
 849		ret = reg_write(client, RJ54N1_RAMP_TGCLK_EN, 3);
 850
 851	/* Disable clock output */
 852	if (!ret)
 853		ret = reg_write(client, RJ54N1_OCLK_DSP, 0);
 854
 855	/* Set divisors */
 856	if (!ret)
 857		ret = reg_write(client, RJ54N1_RATIO_OP,
 858				rj54n1->clk_div.ratio_op);
 859	if (!ret)
 860		ret = reg_write(client, RJ54N1_RATIO_O,
 861				rj54n1->clk_div.ratio_o);
 862
 863	/* Enable OCLK */
 864	if (!ret)
 865		ret = reg_write(client, RJ54N1_OCLK_SEL_EN, 1);
 866
 867	/* Use PLL for Timing Generator, write 2 to reserved bits */
 868	if (!ret)
 869		ret = reg_write(client, RJ54N1_TG_BYPASS, 2);
 870
 871	/* Take sensor out of reset */
 872	if (!ret)
 873		ret = reg_write(client, RJ54N1_RESET_STANDBY,
 874				E_EXCLK | SEN_RSTX);
 875	/* Enable PLL */
 876	if (!ret)
 877		ret = reg_write(client, RJ54N1_PLL_EN, 1);
 878
 879	/* Wait for PLL to stabilise */
 880	msleep(10);
 881
 882	/* Enable clock to frequency divider */
 883	if (!ret)
 884		ret = reg_write(client, RJ54N1_CLK_RST, 1);
 885
 886	if (!ret)
 887		ret = reg_read(client, RJ54N1_CLK_RST);
 888	if (ret != 1) {
 889		dev_err(&client->dev,
 890			"Resetting RJ54N1CB0C clock failed: %d!\n", ret);
 891		return -EIO;
 892	}
 893
 894	/* Start the PLL */
 895	ret = reg_set(client, RJ54N1_OCLK_DSP, 1, 1);
 896
 897	/* Enable OCLK */
 898	if (!ret)
 899		ret = reg_write(client, RJ54N1_OCLK_SEL_EN, 1);
 900
 901	return ret;
 902}
 903
 904static int rj54n1_reg_init(struct i2c_client *client)
 905{
 906	struct rj54n1 *rj54n1 = to_rj54n1(client);
 907	int ret = rj54n1_set_clock(client);
 908
 909	if (!ret)
 910		ret = reg_write_multiple(client, bank_7, ARRAY_SIZE(bank_7));
 911	if (!ret)
 912		ret = reg_write_multiple(client, bank_10, ARRAY_SIZE(bank_10));
 913
 914	/* Set binning divisors */
 915	if (!ret)
 916		ret = reg_write(client, RJ54N1_SCALE_1_2_LEV, 3 | (7 << 4));
 917	if (!ret)
 918		ret = reg_write(client, RJ54N1_SCALE_4_LEV, 0xf);
 919
 920	/* Switch to fixed resize mode */
 921	if (!ret)
 922		ret = reg_write(client, RJ54N1_RESIZE_CONTROL,
 923				RESIZE_HOLD_SEL | 1);
 924
 925	/* Set gain */
 926	if (!ret)
 927		ret = reg_write(client, RJ54N1_Y_GAIN, 0x84);
 928
 929	/*
 930	 * Mirror the image back: default is upside down and left-to-right...
 931	 * Set manual preview / still shot switching
 932	 */
 933	if (!ret)
 934		ret = reg_write(client, RJ54N1_MIRROR_STILL_MODE, 0x27);
 935
 936	if (!ret)
 937		ret = reg_write_multiple(client, bank_4, ARRAY_SIZE(bank_4));
 938
 939	/* Auto exposure area */
 940	if (!ret)
 941		ret = reg_write(client, RJ54N1_EXPOSURE_CONTROL, 0x80);
 942	/* Check current auto WB config */
 943	if (!ret)
 944		ret = reg_read(client, RJ54N1_WB_SEL_WEIGHT_I);
 945	if (ret >= 0) {
 946		rj54n1->auto_wb = ret & 0x80;
 947		ret = reg_write_multiple(client, bank_5, ARRAY_SIZE(bank_5));
 948	}
 949	if (!ret)
 950		ret = reg_write_multiple(client, bank_8, ARRAY_SIZE(bank_8));
 951
 952	if (!ret)
 953		ret = reg_write(client, RJ54N1_RESET_STANDBY,
 954				E_EXCLK | DSP_RSTX | SEN_RSTX);
 955
 956	/* Commit init */
 957	if (!ret)
 958		ret = rj54n1_commit(client);
 959
 960	/* Take DSP, TG, sensor out of reset */
 961	if (!ret)
 962		ret = reg_write(client, RJ54N1_RESET_STANDBY,
 963				E_EXCLK | DSP_RSTX | TG_RSTX | SEN_RSTX);
 964
 965	/* Start register update? Same register as 0x?FE in many bank_* sets */
 966	if (!ret)
 967		ret = reg_write(client, RJ54N1_FWFLG, 2);
 968
 969	/* Constant taken from manufacturer's example */
 970	msleep(700);
 971
 972	return ret;
 973}
 974
 975static int rj54n1_set_fmt(struct v4l2_subdev *sd,
 976		struct v4l2_subdev_state *sd_state,
 977		struct v4l2_subdev_format *format)
 978{
 979	struct v4l2_mbus_framefmt *mf = &format->format;
 980	struct i2c_client *client = v4l2_get_subdevdata(sd);
 981	struct rj54n1 *rj54n1 = to_rj54n1(client);
 982	const struct rj54n1_datafmt *fmt;
 983	int output_w, output_h, max_w, max_h,
 984		input_w = rj54n1->rect.width, input_h = rj54n1->rect.height;
 985	int align = mf->code == MEDIA_BUS_FMT_SBGGR10_1X10 ||
 986		mf->code == MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_BE ||
 987		mf->code == MEDIA_BUS_FMT_SBGGR10_2X8_PADLO_BE ||
 988		mf->code == MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_LE ||
 989		mf->code == MEDIA_BUS_FMT_SBGGR10_2X8_PADLO_LE;
 990	int ret;
 991
 992	if (format->pad)
 993		return -EINVAL;
 994
 995	dev_dbg(&client->dev, "%s: code = %d, width = %u, height = %u\n",
 996		__func__, mf->code, mf->width, mf->height);
 997
 998	fmt = rj54n1_find_datafmt(mf->code, rj54n1_colour_fmts,
 999				  ARRAY_SIZE(rj54n1_colour_fmts));
1000	if (!fmt) {
1001		fmt = rj54n1->fmt;
1002		mf->code = fmt->code;
1003	}
1004
1005	mf->field	= V4L2_FIELD_NONE;
1006	mf->colorspace	= fmt->colorspace;
1007
1008	v4l_bound_align_image(&mf->width, 112, RJ54N1_MAX_WIDTH, align,
1009			      &mf->height, 84, RJ54N1_MAX_HEIGHT, align, 0);
1010
1011	if (format->which == V4L2_SUBDEV_FORMAT_TRY)
1012		return 0;
1013
1014	/*
1015	 * Verify if the sensor has just been powered on. TODO: replace this
1016	 * with proper PM, when a suitable API is available.
1017	 */
1018	ret = reg_read(client, RJ54N1_RESET_STANDBY);
1019	if (ret < 0)
1020		return ret;
1021
1022	if (!(ret & E_EXCLK)) {
1023		ret = rj54n1_reg_init(client);
1024		if (ret < 0)
1025			return ret;
1026	}
1027
1028	/* RA_SEL_UL is only relevant for raw modes, ignored otherwise. */
1029	switch (mf->code) {
1030	case MEDIA_BUS_FMT_YUYV8_2X8:
1031		ret = reg_write(client, RJ54N1_OUT_SEL, 0);
1032		if (!ret)
1033			ret = reg_set(client, RJ54N1_BYTE_SWAP, 8, 8);
1034		break;
1035	case MEDIA_BUS_FMT_YVYU8_2X8:
1036		ret = reg_write(client, RJ54N1_OUT_SEL, 0);
1037		if (!ret)
1038			ret = reg_set(client, RJ54N1_BYTE_SWAP, 0, 8);
1039		break;
1040	case MEDIA_BUS_FMT_RGB565_2X8_LE:
1041		ret = reg_write(client, RJ54N1_OUT_SEL, 0x11);
1042		if (!ret)
1043			ret = reg_set(client, RJ54N1_BYTE_SWAP, 8, 8);
1044		break;
1045	case MEDIA_BUS_FMT_RGB565_2X8_BE:
1046		ret = reg_write(client, RJ54N1_OUT_SEL, 0x11);
1047		if (!ret)
1048			ret = reg_set(client, RJ54N1_BYTE_SWAP, 0, 8);
1049		break;
1050	case MEDIA_BUS_FMT_SBGGR10_2X8_PADLO_LE:
1051		ret = reg_write(client, RJ54N1_OUT_SEL, 4);
1052		if (!ret)
1053			ret = reg_set(client, RJ54N1_BYTE_SWAP, 8, 8);
1054		if (!ret)
1055			ret = reg_write(client, RJ54N1_RA_SEL_UL, 0);
1056		break;
1057	case MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_LE:
1058		ret = reg_write(client, RJ54N1_OUT_SEL, 4);
1059		if (!ret)
1060			ret = reg_set(client, RJ54N1_BYTE_SWAP, 8, 8);
1061		if (!ret)
1062			ret = reg_write(client, RJ54N1_RA_SEL_UL, 8);
1063		break;
1064	case MEDIA_BUS_FMT_SBGGR10_2X8_PADLO_BE:
1065		ret = reg_write(client, RJ54N1_OUT_SEL, 4);
1066		if (!ret)
1067			ret = reg_set(client, RJ54N1_BYTE_SWAP, 0, 8);
1068		if (!ret)
1069			ret = reg_write(client, RJ54N1_RA_SEL_UL, 0);
1070		break;
1071	case MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_BE:
1072		ret = reg_write(client, RJ54N1_OUT_SEL, 4);
1073		if (!ret)
1074			ret = reg_set(client, RJ54N1_BYTE_SWAP, 0, 8);
1075		if (!ret)
1076			ret = reg_write(client, RJ54N1_RA_SEL_UL, 8);
1077		break;
1078	case MEDIA_BUS_FMT_SBGGR10_1X10:
1079		ret = reg_write(client, RJ54N1_OUT_SEL, 5);
1080		break;
1081	default:
1082		ret = -EINVAL;
1083	}
1084
1085	/* Special case: a raw mode with 10 bits of data per clock tick */
1086	if (!ret)
1087		ret = reg_set(client, RJ54N1_OCLK_SEL_EN,
1088			      (mf->code == MEDIA_BUS_FMT_SBGGR10_1X10) << 1, 2);
1089
1090	if (ret < 0)
1091		return ret;
1092
1093	/* Supported scales 1:1 >= scale > 1:16 */
1094	max_w = mf->width * (16 * 1024 - 1) / 1024;
1095	if (input_w > max_w)
1096		input_w = max_w;
1097	max_h = mf->height * (16 * 1024 - 1) / 1024;
1098	if (input_h > max_h)
1099		input_h = max_h;
1100
1101	output_w = mf->width;
1102	output_h = mf->height;
1103
1104	ret = rj54n1_sensor_scale(sd, &input_w, &input_h, &output_w, &output_h);
1105	if (ret < 0)
1106		return ret;
1107
1108	fmt = rj54n1_find_datafmt(mf->code, rj54n1_colour_fmts,
1109				  ARRAY_SIZE(rj54n1_colour_fmts));
1110
1111	rj54n1->fmt		= fmt;
1112	rj54n1->resize		= ret;
1113	rj54n1->rect.width	= input_w;
1114	rj54n1->rect.height	= input_h;
1115	rj54n1->width		= output_w;
1116	rj54n1->height		= output_h;
1117
1118	mf->width		= output_w;
1119	mf->height		= output_h;
1120	mf->field		= V4L2_FIELD_NONE;
1121	mf->colorspace		= fmt->colorspace;
1122
1123	return 0;
1124}
1125
1126#ifdef CONFIG_VIDEO_ADV_DEBUG
1127static int rj54n1_g_register(struct v4l2_subdev *sd,
1128			     struct v4l2_dbg_register *reg)
1129{
1130	struct i2c_client *client = v4l2_get_subdevdata(sd);
1131
1132	if (reg->reg < 0x400 || reg->reg > 0x1fff)
1133		/* Registers > 0x0800 are only available from Sharp support */
1134		return -EINVAL;
1135
1136	reg->size = 1;
1137	reg->val = reg_read(client, reg->reg);
1138
1139	if (reg->val > 0xff)
1140		return -EIO;
1141
1142	return 0;
1143}
1144
1145static int rj54n1_s_register(struct v4l2_subdev *sd,
1146			     const struct v4l2_dbg_register *reg)
1147{
1148	struct i2c_client *client = v4l2_get_subdevdata(sd);
1149
1150	if (reg->reg < 0x400 || reg->reg > 0x1fff)
1151		/* Registers >= 0x0800 are only available from Sharp support */
1152		return -EINVAL;
1153
1154	if (reg_write(client, reg->reg, reg->val) < 0)
1155		return -EIO;
1156
1157	return 0;
1158}
1159#endif
1160
1161static int rj54n1_s_power(struct v4l2_subdev *sd, int on)
1162{
1163	struct i2c_client *client = v4l2_get_subdevdata(sd);
1164	struct rj54n1 *rj54n1 = to_rj54n1(client);
1165
1166	if (on) {
1167		if (rj54n1->pwup_gpio)
1168			gpiod_set_value(rj54n1->pwup_gpio, 1);
1169		if (rj54n1->enable_gpio)
1170			gpiod_set_value(rj54n1->enable_gpio, 1);
1171
1172		msleep(1);
1173
1174		return clk_prepare_enable(rj54n1->clk);
1175	}
1176
1177	clk_disable_unprepare(rj54n1->clk);
1178
1179	if (rj54n1->enable_gpio)
1180		gpiod_set_value(rj54n1->enable_gpio, 0);
1181	if (rj54n1->pwup_gpio)
1182		gpiod_set_value(rj54n1->pwup_gpio, 0);
1183
1184	return 0;
1185}
1186
1187static int rj54n1_s_ctrl(struct v4l2_ctrl *ctrl)
1188{
1189	struct rj54n1 *rj54n1 = container_of(ctrl->handler, struct rj54n1, hdl);
1190	struct v4l2_subdev *sd = &rj54n1->subdev;
1191	struct i2c_client *client = v4l2_get_subdevdata(sd);
1192	int data;
1193
1194	switch (ctrl->id) {
1195	case V4L2_CID_VFLIP:
1196		if (ctrl->val)
1197			data = reg_set(client, RJ54N1_MIRROR_STILL_MODE, 0, 1);
1198		else
1199			data = reg_set(client, RJ54N1_MIRROR_STILL_MODE, 1, 1);
1200		if (data < 0)
1201			return -EIO;
1202		return 0;
1203	case V4L2_CID_HFLIP:
1204		if (ctrl->val)
1205			data = reg_set(client, RJ54N1_MIRROR_STILL_MODE, 0, 2);
1206		else
1207			data = reg_set(client, RJ54N1_MIRROR_STILL_MODE, 2, 2);
1208		if (data < 0)
1209			return -EIO;
1210		return 0;
1211	case V4L2_CID_GAIN:
1212		if (reg_write(client, RJ54N1_Y_GAIN, ctrl->val * 2) < 0)
1213			return -EIO;
1214		return 0;
1215	case V4L2_CID_AUTO_WHITE_BALANCE:
1216		/* Auto WB area - whole image */
1217		if (reg_set(client, RJ54N1_WB_SEL_WEIGHT_I, ctrl->val << 7,
1218			    0x80) < 0)
1219			return -EIO;
1220		rj54n1->auto_wb = ctrl->val;
1221		return 0;
1222	}
1223
1224	return -EINVAL;
1225}
1226
1227static const struct v4l2_ctrl_ops rj54n1_ctrl_ops = {
1228	.s_ctrl = rj54n1_s_ctrl,
1229};
1230
1231static const struct v4l2_subdev_core_ops rj54n1_subdev_core_ops = {
1232#ifdef CONFIG_VIDEO_ADV_DEBUG
1233	.g_register	= rj54n1_g_register,
1234	.s_register	= rj54n1_s_register,
1235#endif
1236	.s_power	= rj54n1_s_power,
1237};
1238
1239static const struct v4l2_subdev_video_ops rj54n1_subdev_video_ops = {
1240	.s_stream	= rj54n1_s_stream,
1241};
1242
1243static const struct v4l2_subdev_pad_ops rj54n1_subdev_pad_ops = {
1244	.enum_mbus_code = rj54n1_enum_mbus_code,
1245	.get_selection	= rj54n1_get_selection,
1246	.set_selection	= rj54n1_set_selection,
1247	.get_fmt	= rj54n1_get_fmt,
1248	.set_fmt	= rj54n1_set_fmt,
1249};
1250
1251static const struct v4l2_subdev_ops rj54n1_subdev_ops = {
1252	.core	= &rj54n1_subdev_core_ops,
1253	.video	= &rj54n1_subdev_video_ops,
1254	.pad	= &rj54n1_subdev_pad_ops,
1255};
1256
1257/*
1258 * Interface active, can use i2c. If it fails, it can indeed mean, that
1259 * this wasn't our capture interface, so, we wait for the right one
1260 */
1261static int rj54n1_video_probe(struct i2c_client *client,
1262			      struct rj54n1_pdata *priv)
1263{
1264	struct rj54n1 *rj54n1 = to_rj54n1(client);
1265	int data1, data2;
1266	int ret;
1267
1268	ret = rj54n1_s_power(&rj54n1->subdev, 1);
1269	if (ret < 0)
1270		return ret;
1271
1272	/* Read out the chip version register */
1273	data1 = reg_read(client, RJ54N1_DEV_CODE);
1274	data2 = reg_read(client, RJ54N1_DEV_CODE2);
1275
1276	if (data1 != 0x51 || data2 != 0x10) {
1277		ret = -ENODEV;
1278		dev_info(&client->dev, "No RJ54N1CB0C found, read 0x%x:0x%x\n",
1279			 data1, data2);
1280		goto done;
1281	}
1282
1283	/* Configure IOCTL polarity from the platform data: 0 or 1 << 7. */
1284	ret = reg_write(client, RJ54N1_IOC, priv->ioctl_high << 7);
1285	if (ret < 0)
1286		goto done;
1287
1288	dev_info(&client->dev, "Detected a RJ54N1CB0C chip ID 0x%x:0x%x\n",
1289		 data1, data2);
1290
1291	ret = v4l2_ctrl_handler_setup(&rj54n1->hdl);
1292
1293done:
1294	rj54n1_s_power(&rj54n1->subdev, 0);
1295	return ret;
1296}
1297
1298static int rj54n1_probe(struct i2c_client *client)
1299{
1300	struct rj54n1 *rj54n1;
1301	struct i2c_adapter *adapter = client->adapter;
1302	struct rj54n1_pdata *rj54n1_priv;
1303	int ret;
1304
1305	if (!client->dev.platform_data) {
1306		dev_err(&client->dev, "RJ54N1CB0C: missing platform data!\n");
1307		return -EINVAL;
1308	}
1309
1310	rj54n1_priv = client->dev.platform_data;
1311
1312	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
1313		dev_warn(&adapter->dev,
1314			 "I2C-Adapter doesn't support I2C_FUNC_SMBUS_BYTE\n");
1315		return -EIO;
1316	}
1317
1318	rj54n1 = devm_kzalloc(&client->dev, sizeof(struct rj54n1), GFP_KERNEL);
1319	if (!rj54n1)
1320		return -ENOMEM;
1321
1322	v4l2_i2c_subdev_init(&rj54n1->subdev, client, &rj54n1_subdev_ops);
1323	v4l2_ctrl_handler_init(&rj54n1->hdl, 4);
1324	v4l2_ctrl_new_std(&rj54n1->hdl, &rj54n1_ctrl_ops,
1325			V4L2_CID_VFLIP, 0, 1, 1, 0);
1326	v4l2_ctrl_new_std(&rj54n1->hdl, &rj54n1_ctrl_ops,
1327			V4L2_CID_HFLIP, 0, 1, 1, 0);
1328	v4l2_ctrl_new_std(&rj54n1->hdl, &rj54n1_ctrl_ops,
1329			V4L2_CID_GAIN, 0, 127, 1, 66);
1330	v4l2_ctrl_new_std(&rj54n1->hdl, &rj54n1_ctrl_ops,
1331			V4L2_CID_AUTO_WHITE_BALANCE, 0, 1, 1, 1);
1332
1333	if (rj54n1->hdl.error) {
1334		ret = rj54n1->hdl.error;
1335		goto err_free_ctrl;
1336	}
1337
1338	rj54n1->subdev.ctrl_handler = &rj54n1->hdl;
1339	rj54n1->clk_div		= clk_div;
1340	rj54n1->rect.left	= RJ54N1_COLUMN_SKIP;
1341	rj54n1->rect.top	= RJ54N1_ROW_SKIP;
1342	rj54n1->rect.width	= RJ54N1_MAX_WIDTH;
1343	rj54n1->rect.height	= RJ54N1_MAX_HEIGHT;
1344	rj54n1->width		= RJ54N1_MAX_WIDTH;
1345	rj54n1->height		= RJ54N1_MAX_HEIGHT;
1346	rj54n1->fmt		= &rj54n1_colour_fmts[0];
1347	rj54n1->resize		= 1024;
1348	rj54n1->tgclk_mhz	= (rj54n1_priv->mclk_freq / PLL_L * PLL_N) /
1349		(clk_div.ratio_tg + 1) / (clk_div.ratio_t + 1);
1350
1351	rj54n1->clk = clk_get(&client->dev, NULL);
1352	if (IS_ERR(rj54n1->clk)) {
1353		ret = PTR_ERR(rj54n1->clk);
1354		goto err_free_ctrl;
1355	}
1356
1357	rj54n1->pwup_gpio = gpiod_get_optional(&client->dev, "powerup",
1358					       GPIOD_OUT_LOW);
1359	if (IS_ERR(rj54n1->pwup_gpio)) {
1360		dev_info(&client->dev, "Unable to get GPIO \"powerup\": %pe\n",
1361			 rj54n1->pwup_gpio);
1362		ret = PTR_ERR(rj54n1->pwup_gpio);
1363		goto err_clk_put;
1364	}
1365
1366	rj54n1->enable_gpio = gpiod_get_optional(&client->dev, "enable",
1367						 GPIOD_OUT_LOW);
1368	if (IS_ERR(rj54n1->enable_gpio)) {
1369		dev_info(&client->dev, "Unable to get GPIO \"enable\": %pe\n",
1370			 rj54n1->enable_gpio);
1371		ret = PTR_ERR(rj54n1->enable_gpio);
1372		goto err_gpio_put;
1373	}
1374
1375	ret = rj54n1_video_probe(client, rj54n1_priv);
1376	if (ret < 0)
1377		goto err_gpio_put;
1378
1379	ret = v4l2_async_register_subdev(&rj54n1->subdev);
1380	if (ret)
1381		goto err_gpio_put;
1382
1383	return 0;
1384
1385err_gpio_put:
1386	if (rj54n1->enable_gpio)
1387		gpiod_put(rj54n1->enable_gpio);
1388
1389	if (rj54n1->pwup_gpio)
1390		gpiod_put(rj54n1->pwup_gpio);
1391
1392err_clk_put:
1393	clk_put(rj54n1->clk);
1394
1395err_free_ctrl:
1396	v4l2_ctrl_handler_free(&rj54n1->hdl);
1397
1398	return ret;
1399}
1400
1401static void rj54n1_remove(struct i2c_client *client)
1402{
1403	struct rj54n1 *rj54n1 = to_rj54n1(client);
1404
1405	if (rj54n1->enable_gpio)
1406		gpiod_put(rj54n1->enable_gpio);
1407	if (rj54n1->pwup_gpio)
1408		gpiod_put(rj54n1->pwup_gpio);
1409
1410	clk_put(rj54n1->clk);
1411	v4l2_ctrl_handler_free(&rj54n1->hdl);
1412	v4l2_async_unregister_subdev(&rj54n1->subdev);
1413}
1414
1415static const struct i2c_device_id rj54n1_id[] = {
1416	{ "rj54n1cb0c" },
1417	{ }
1418};
1419MODULE_DEVICE_TABLE(i2c, rj54n1_id);
1420
1421static struct i2c_driver rj54n1_i2c_driver = {
1422	.driver = {
1423		.name = "rj54n1cb0c",
1424	},
1425	.probe		= rj54n1_probe,
1426	.remove		= rj54n1_remove,
1427	.id_table	= rj54n1_id,
1428};
1429
1430module_i2c_driver(rj54n1_i2c_driver);
1431
1432MODULE_DESCRIPTION("Sharp RJ54N1CB0C Camera driver");
1433MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
1434MODULE_LICENSE("GPL v2");