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Merge drm-fixes into drm-next.
[deliverable/linux.git] / drivers / media / i2c / s5k5baf.c
1 /*
2 * Driver for Samsung S5K5BAF UXGA 1/5" 2M CMOS Image Sensor
3 * with embedded SoC ISP.
4 *
5 * Copyright (C) 2013, Samsung Electronics Co., Ltd.
6 * Andrzej Hajda <a.hajda@samsung.com>
7 *
8 * Based on S5K6AA driver authored by Sylwester Nawrocki
9 * Copyright (C) 2013, Samsung Electronics Co., Ltd.
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
14 */
15
16 #include <linux/clk.h>
17 #include <linux/delay.h>
18 #include <linux/firmware.h>
19 #include <linux/gpio.h>
20 #include <linux/i2c.h>
21 #include <linux/media.h>
22 #include <linux/module.h>
23 #include <linux/of_gpio.h>
24 #include <linux/of_graph.h>
25 #include <linux/regulator/consumer.h>
26 #include <linux/slab.h>
27
28 #include <media/media-entity.h>
29 #include <media/v4l2-ctrls.h>
30 #include <media/v4l2-device.h>
31 #include <media/v4l2-subdev.h>
32 #include <media/v4l2-mediabus.h>
33 #include <media/v4l2-of.h>
34
35 static int debug;
36 module_param(debug, int, 0644);
37
38 #define S5K5BAF_DRIVER_NAME "s5k5baf"
39 #define S5K5BAF_DEFAULT_MCLK_FREQ 24000000U
40 #define S5K5BAF_CLK_NAME "mclk"
41
42 #define S5K5BAF_FW_FILENAME "s5k5baf-cfg.bin"
43 #define S5K5BAF_FW_TAG "SF00"
44 #define S5K5BAG_FW_TAG_LEN 2
45 #define S5K5BAG_FW_MAX_COUNT 16
46
47 #define S5K5BAF_CIS_WIDTH 1600
48 #define S5K5BAF_CIS_HEIGHT 1200
49 #define S5K5BAF_WIN_WIDTH_MIN 8
50 #define S5K5BAF_WIN_HEIGHT_MIN 8
51 #define S5K5BAF_GAIN_RED_DEF 127
52 #define S5K5BAF_GAIN_GREEN_DEF 95
53 #define S5K5BAF_GAIN_BLUE_DEF 180
54 /* Default number of MIPI CSI-2 data lanes used */
55 #define S5K5BAF_DEF_NUM_LANES 1
56
57 #define AHB_MSB_ADDR_PTR 0xfcfc
58
59 /*
60 * Register interface pages (the most significant word of the address)
61 */
62 #define PAGE_IF_HW 0xd000
63 #define PAGE_IF_SW 0x7000
64
65 /*
66 * H/W register Interface (PAGE_IF_HW)
67 */
68 #define REG_SW_LOAD_COMPLETE 0x0014
69 #define REG_CMDWR_PAGE 0x0028
70 #define REG_CMDWR_ADDR 0x002a
71 #define REG_CMDRD_PAGE 0x002c
72 #define REG_CMDRD_ADDR 0x002e
73 #define REG_CMD_BUF 0x0f12
74 #define REG_SET_HOST_INT 0x1000
75 #define REG_CLEAR_HOST_INT 0x1030
76 #define REG_PATTERN_SET 0x3100
77 #define REG_PATTERN_WIDTH 0x3118
78 #define REG_PATTERN_HEIGHT 0x311a
79 #define REG_PATTERN_PARAM 0x311c
80
81 /*
82 * S/W register interface (PAGE_IF_SW)
83 */
84
85 /* Firmware revision information */
86 #define REG_FW_APIVER 0x012e
87 #define S5K5BAF_FW_APIVER 0x0001
88 #define REG_FW_REVISION 0x0130
89 #define REG_FW_SENSOR_ID 0x0152
90
91 /* Initialization parameters */
92 /* Master clock frequency in KHz */
93 #define REG_I_INCLK_FREQ_L 0x01b8
94 #define REG_I_INCLK_FREQ_H 0x01ba
95 #define MIN_MCLK_FREQ_KHZ 6000U
96 #define MAX_MCLK_FREQ_KHZ 48000U
97 #define REG_I_USE_NPVI_CLOCKS 0x01c6
98 #define NPVI_CLOCKS 1
99 #define REG_I_USE_NMIPI_CLOCKS 0x01c8
100 #define NMIPI_CLOCKS 1
101 #define REG_I_BLOCK_INTERNAL_PLL_CALC 0x01ca
102
103 /* Clock configurations, n = 0..2. REG_I_* frequency unit is 4 kHz. */
104 #define REG_I_OPCLK_4KHZ(n) ((n) * 6 + 0x01cc)
105 #define REG_I_MIN_OUTRATE_4KHZ(n) ((n) * 6 + 0x01ce)
106 #define REG_I_MAX_OUTRATE_4KHZ(n) ((n) * 6 + 0x01d0)
107 #define SCLK_PVI_FREQ 24000
108 #define SCLK_MIPI_FREQ 48000
109 #define PCLK_MIN_FREQ 6000
110 #define PCLK_MAX_FREQ 48000
111 #define REG_I_USE_REGS_API 0x01de
112 #define REG_I_INIT_PARAMS_UPDATED 0x01e0
113 #define REG_I_ERROR_INFO 0x01e2
114
115 /* General purpose parameters */
116 #define REG_USER_BRIGHTNESS 0x01e4
117 #define REG_USER_CONTRAST 0x01e6
118 #define REG_USER_SATURATION 0x01e8
119 #define REG_USER_SHARPBLUR 0x01ea
120
121 #define REG_G_SPEC_EFFECTS 0x01ee
122 #define REG_G_ENABLE_PREV 0x01f0
123 #define REG_G_ENABLE_PREV_CHG 0x01f2
124 #define REG_G_NEW_CFG_SYNC 0x01f8
125 #define REG_G_PREVREQ_IN_WIDTH 0x01fa
126 #define REG_G_PREVREQ_IN_HEIGHT 0x01fc
127 #define REG_G_PREVREQ_IN_XOFFS 0x01fe
128 #define REG_G_PREVREQ_IN_YOFFS 0x0200
129 #define REG_G_PREVZOOM_IN_WIDTH 0x020a
130 #define REG_G_PREVZOOM_IN_HEIGHT 0x020c
131 #define REG_G_PREVZOOM_IN_XOFFS 0x020e
132 #define REG_G_PREVZOOM_IN_YOFFS 0x0210
133 #define REG_G_INPUTS_CHANGE_REQ 0x021a
134 #define REG_G_ACTIVE_PREV_CFG 0x021c
135 #define REG_G_PREV_CFG_CHG 0x021e
136 #define REG_G_PREV_OPEN_AFTER_CH 0x0220
137 #define REG_G_PREV_CFG_ERROR 0x0222
138 #define CFG_ERROR_RANGE 0x0b
139 #define REG_G_PREV_CFG_BYPASS_CHANGED 0x022a
140 #define REG_G_ACTUAL_P_FR_TIME 0x023a
141 #define REG_G_ACTUAL_P_OUT_RATE 0x023c
142 #define REG_G_ACTUAL_C_FR_TIME 0x023e
143 #define REG_G_ACTUAL_C_OUT_RATE 0x0240
144
145 /* Preview control section. n = 0...4. */
146 #define PREG(n, x) ((n) * 0x26 + x)
147 #define REG_P_OUT_WIDTH(n) PREG(n, 0x0242)
148 #define REG_P_OUT_HEIGHT(n) PREG(n, 0x0244)
149 #define REG_P_FMT(n) PREG(n, 0x0246)
150 #define REG_P_MAX_OUT_RATE(n) PREG(n, 0x0248)
151 #define REG_P_MIN_OUT_RATE(n) PREG(n, 0x024a)
152 #define REG_P_PVI_MASK(n) PREG(n, 0x024c)
153 #define PVI_MASK_MIPI 0x52
154 #define REG_P_CLK_INDEX(n) PREG(n, 0x024e)
155 #define CLK_PVI_INDEX 0
156 #define CLK_MIPI_INDEX NPVI_CLOCKS
157 #define REG_P_FR_RATE_TYPE(n) PREG(n, 0x0250)
158 #define FR_RATE_DYNAMIC 0
159 #define FR_RATE_FIXED 1
160 #define FR_RATE_FIXED_ACCURATE 2
161 #define REG_P_FR_RATE_Q_TYPE(n) PREG(n, 0x0252)
162 #define FR_RATE_Q_DYNAMIC 0
163 #define FR_RATE_Q_BEST_FRRATE 1 /* Binning enabled */
164 #define FR_RATE_Q_BEST_QUALITY 2 /* Binning disabled */
165 /* Frame period in 0.1 ms units */
166 #define REG_P_MAX_FR_TIME(n) PREG(n, 0x0254)
167 #define REG_P_MIN_FR_TIME(n) PREG(n, 0x0256)
168 #define S5K5BAF_MIN_FR_TIME 333 /* x100 us */
169 #define S5K5BAF_MAX_FR_TIME 6500 /* x100 us */
170 /* The below 5 registers are for "device correction" values */
171 #define REG_P_SATURATION(n) PREG(n, 0x0258)
172 #define REG_P_SHARP_BLUR(n) PREG(n, 0x025a)
173 #define REG_P_GLAMOUR(n) PREG(n, 0x025c)
174 #define REG_P_COLORTEMP(n) PREG(n, 0x025e)
175 #define REG_P_GAMMA_INDEX(n) PREG(n, 0x0260)
176 #define REG_P_PREV_MIRROR(n) PREG(n, 0x0262)
177 #define REG_P_CAP_MIRROR(n) PREG(n, 0x0264)
178 #define REG_P_CAP_ROTATION(n) PREG(n, 0x0266)
179
180 /* Extended image property controls */
181 /* Exposure time in 10 us units */
182 #define REG_SF_USR_EXPOSURE_L 0x03bc
183 #define REG_SF_USR_EXPOSURE_H 0x03be
184 #define REG_SF_USR_EXPOSURE_CHG 0x03c0
185 #define REG_SF_USR_TOT_GAIN 0x03c2
186 #define REG_SF_USR_TOT_GAIN_CHG 0x03c4
187 #define REG_SF_RGAIN 0x03c6
188 #define REG_SF_RGAIN_CHG 0x03c8
189 #define REG_SF_GGAIN 0x03ca
190 #define REG_SF_GGAIN_CHG 0x03cc
191 #define REG_SF_BGAIN 0x03ce
192 #define REG_SF_BGAIN_CHG 0x03d0
193 #define REG_SF_WBGAIN_CHG 0x03d2
194 #define REG_SF_FLICKER_QUANT 0x03d4
195 #define REG_SF_FLICKER_QUANT_CHG 0x03d6
196
197 /* Output interface (parallel/MIPI) setup */
198 #define REG_OIF_EN_MIPI_LANES 0x03f2
199 #define REG_OIF_EN_PACKETS 0x03f4
200 #define EN_PACKETS_CSI2 0xc3
201 #define REG_OIF_CFG_CHG 0x03f6
202
203 /* Auto-algorithms enable mask */
204 #define REG_DBG_AUTOALG_EN 0x03f8
205 #define AALG_ALL_EN BIT(0)
206 #define AALG_AE_EN BIT(1)
207 #define AALG_DIVLEI_EN BIT(2)
208 #define AALG_WB_EN BIT(3)
209 #define AALG_USE_WB_FOR_ISP BIT(4)
210 #define AALG_FLICKER_EN BIT(5)
211 #define AALG_FIT_EN BIT(6)
212 #define AALG_WRHW_EN BIT(7)
213
214 /* Pointers to color correction matrices */
215 #define REG_PTR_CCM_HORIZON 0x06d0
216 #define REG_PTR_CCM_INCANDESCENT 0x06d4
217 #define REG_PTR_CCM_WARM_WHITE 0x06d8
218 #define REG_PTR_CCM_COOL_WHITE 0x06dc
219 #define REG_PTR_CCM_DL50 0x06e0
220 #define REG_PTR_CCM_DL65 0x06e4
221 #define REG_PTR_CCM_OUTDOOR 0x06ec
222
223 #define REG_ARR_CCM(n) (0x2800 + 36 * (n))
224
225 static const char * const s5k5baf_supply_names[] = {
226 "vdda", /* Analog power supply 2.8V (2.6V to 3.0V) */
227 "vddreg", /* Regulator input power supply 1.8V (1.7V to 1.9V)
228 or 2.8V (2.6V to 3.0) */
229 "vddio", /* I/O power supply 1.8V (1.65V to 1.95V)
230 or 2.8V (2.5V to 3.1V) */
231 };
232 #define S5K5BAF_NUM_SUPPLIES ARRAY_SIZE(s5k5baf_supply_names)
233
234 struct s5k5baf_gpio {
235 int gpio;
236 int level;
237 };
238
239 enum s5k5baf_gpio_id {
240 STBY,
241 RST,
242 NUM_GPIOS,
243 };
244
245 #define PAD_CIS 0
246 #define PAD_OUT 1
247 #define NUM_CIS_PADS 1
248 #define NUM_ISP_PADS 2
249
250 struct s5k5baf_pixfmt {
251 u32 code;
252 u32 colorspace;
253 /* REG_P_FMT(x) register value */
254 u16 reg_p_fmt;
255 };
256
257 struct s5k5baf_ctrls {
258 struct v4l2_ctrl_handler handler;
259 struct { /* Auto / manual white balance cluster */
260 struct v4l2_ctrl *awb;
261 struct v4l2_ctrl *gain_red;
262 struct v4l2_ctrl *gain_blue;
263 };
264 struct { /* Mirror cluster */
265 struct v4l2_ctrl *hflip;
266 struct v4l2_ctrl *vflip;
267 };
268 struct { /* Auto exposure / manual exposure and gain cluster */
269 struct v4l2_ctrl *auto_exp;
270 struct v4l2_ctrl *exposure;
271 struct v4l2_ctrl *gain;
272 };
273 };
274
275 enum {
276 S5K5BAF_FW_ID_PATCH,
277 S5K5BAF_FW_ID_CCM,
278 S5K5BAF_FW_ID_CIS,
279 };
280
281 struct s5k5baf_fw {
282 u16 count;
283 struct {
284 u16 id;
285 u16 offset;
286 } seq[0];
287 u16 data[0];
288 };
289
290 struct s5k5baf {
291 struct s5k5baf_gpio gpios[NUM_GPIOS];
292 enum v4l2_mbus_type bus_type;
293 u8 nlanes;
294 struct regulator_bulk_data supplies[S5K5BAF_NUM_SUPPLIES];
295
296 struct clk *clock;
297 u32 mclk_frequency;
298
299 struct s5k5baf_fw *fw;
300
301 struct v4l2_subdev cis_sd;
302 struct media_pad cis_pad;
303
304 struct v4l2_subdev sd;
305 struct media_pad pads[NUM_ISP_PADS];
306
307 /* protects the struct members below */
308 struct mutex lock;
309
310 int error;
311
312 struct v4l2_rect crop_sink;
313 struct v4l2_rect compose;
314 struct v4l2_rect crop_source;
315 /* index to s5k5baf_formats array */
316 int pixfmt;
317 /* actual frame interval in 100us */
318 u16 fiv;
319 /* requested frame interval in 100us */
320 u16 req_fiv;
321 /* cache for REG_DBG_AUTOALG_EN register */
322 u16 auto_alg;
323
324 struct s5k5baf_ctrls ctrls;
325
326 unsigned int streaming:1;
327 unsigned int apply_cfg:1;
328 unsigned int apply_crop:1;
329 unsigned int valid_auto_alg:1;
330 unsigned int power;
331 };
332
333 static const struct s5k5baf_pixfmt s5k5baf_formats[] = {
334 { MEDIA_BUS_FMT_VYUY8_2X8, V4L2_COLORSPACE_JPEG, 5 },
335 /* range 16-240 */
336 { MEDIA_BUS_FMT_VYUY8_2X8, V4L2_COLORSPACE_REC709, 6 },
337 { MEDIA_BUS_FMT_RGB565_2X8_BE, V4L2_COLORSPACE_JPEG, 0 },
338 };
339
340 static struct v4l2_rect s5k5baf_cis_rect = {
341 0, 0, S5K5BAF_CIS_WIDTH, S5K5BAF_CIS_HEIGHT
342 };
343
344 /* Setfile contains set of I2C command sequences. Each sequence has its ID.
345 * setfile format:
346 * u8 magic[4];
347 * u16 count; number of sequences
348 * struct {
349 * u16 id; sequence id
350 * u16 offset; sequence offset in data array
351 * } seq[count];
352 * u16 data[*]; array containing sequences
353 *
354 */
355 static int s5k5baf_fw_parse(struct device *dev, struct s5k5baf_fw **fw,
356 size_t count, const __le16 *data)
357 {
358 struct s5k5baf_fw *f;
359 u16 *d, i, *end;
360 int ret;
361
362 if (count < S5K5BAG_FW_TAG_LEN + 1) {
363 dev_err(dev, "firmware file too short (%zu)\n", count);
364 return -EINVAL;
365 }
366
367 ret = memcmp(data, S5K5BAF_FW_TAG, S5K5BAG_FW_TAG_LEN * sizeof(u16));
368 if (ret != 0) {
369 dev_err(dev, "invalid firmware magic number\n");
370 return -EINVAL;
371 }
372
373 data += S5K5BAG_FW_TAG_LEN;
374 count -= S5K5BAG_FW_TAG_LEN;
375
376 d = devm_kzalloc(dev, count * sizeof(u16), GFP_KERNEL);
377 if (!d)
378 return -ENOMEM;
379
380 for (i = 0; i < count; ++i)
381 d[i] = le16_to_cpu(data[i]);
382
383 f = (struct s5k5baf_fw *)d;
384 if (count < 1 + 2 * f->count) {
385 dev_err(dev, "invalid firmware header (count=%d size=%zu)\n",
386 f->count, 2 * (count + S5K5BAG_FW_TAG_LEN));
387 return -EINVAL;
388 }
389 end = d + count;
390 d += 1 + 2 * f->count;
391
392 for (i = 0; i < f->count; ++i) {
393 if (f->seq[i].offset + d <= end)
394 continue;
395 dev_err(dev, "invalid firmware header (seq=%d)\n", i);
396 return -EINVAL;
397 }
398
399 *fw = f;
400
401 return 0;
402 }
403
404 static inline struct v4l2_subdev *ctrl_to_sd(struct v4l2_ctrl *ctrl)
405 {
406 return &container_of(ctrl->handler, struct s5k5baf, ctrls.handler)->sd;
407 }
408
409 static inline bool s5k5baf_is_cis_subdev(struct v4l2_subdev *sd)
410 {
411 return sd->entity.function == MEDIA_ENT_F_CAM_SENSOR;
412 }
413
414 static inline struct s5k5baf *to_s5k5baf(struct v4l2_subdev *sd)
415 {
416 if (s5k5baf_is_cis_subdev(sd))
417 return container_of(sd, struct s5k5baf, cis_sd);
418 else
419 return container_of(sd, struct s5k5baf, sd);
420 }
421
422 static u16 s5k5baf_i2c_read(struct s5k5baf *state, u16 addr)
423 {
424 struct i2c_client *c = v4l2_get_subdevdata(&state->sd);
425 __be16 w, r;
426 u16 res;
427 struct i2c_msg msg[] = {
428 { .addr = c->addr, .flags = 0,
429 .len = 2, .buf = (u8 *)&w },
430 { .addr = c->addr, .flags = I2C_M_RD,
431 .len = 2, .buf = (u8 *)&r },
432 };
433 int ret;
434
435 if (state->error)
436 return 0;
437
438 w = cpu_to_be16(addr);
439 ret = i2c_transfer(c->adapter, msg, 2);
440 res = be16_to_cpu(r);
441
442 v4l2_dbg(3, debug, c, "i2c_read: 0x%04x : 0x%04x\n", addr, res);
443
444 if (ret != 2) {
445 v4l2_err(c, "i2c_read: error during transfer (%d)\n", ret);
446 state->error = ret;
447 }
448 return res;
449 }
450
451 static void s5k5baf_i2c_write(struct s5k5baf *state, u16 addr, u16 val)
452 {
453 u8 buf[4] = { addr >> 8, addr & 0xFF, val >> 8, val & 0xFF };
454 struct i2c_client *c = v4l2_get_subdevdata(&state->sd);
455 int ret;
456
457 if (state->error)
458 return;
459
460 ret = i2c_master_send(c, buf, 4);
461 v4l2_dbg(3, debug, c, "i2c_write: 0x%04x : 0x%04x\n", addr, val);
462
463 if (ret != 4) {
464 v4l2_err(c, "i2c_write: error during transfer (%d)\n", ret);
465 state->error = ret;
466 }
467 }
468
469 static u16 s5k5baf_read(struct s5k5baf *state, u16 addr)
470 {
471 s5k5baf_i2c_write(state, REG_CMDRD_ADDR, addr);
472 return s5k5baf_i2c_read(state, REG_CMD_BUF);
473 }
474
475 static void s5k5baf_write(struct s5k5baf *state, u16 addr, u16 val)
476 {
477 s5k5baf_i2c_write(state, REG_CMDWR_ADDR, addr);
478 s5k5baf_i2c_write(state, REG_CMD_BUF, val);
479 }
480
481 static void s5k5baf_write_arr_seq(struct s5k5baf *state, u16 addr,
482 u16 count, const u16 *seq)
483 {
484 struct i2c_client *c = v4l2_get_subdevdata(&state->sd);
485 __be16 buf[65];
486
487 s5k5baf_i2c_write(state, REG_CMDWR_ADDR, addr);
488 if (state->error)
489 return;
490
491 v4l2_dbg(3, debug, c, "i2c_write_seq(count=%d): %*ph\n", count,
492 min(2 * count, 64), seq);
493
494 buf[0] = cpu_to_be16(REG_CMD_BUF);
495
496 while (count > 0) {
497 int n = min_t(int, count, ARRAY_SIZE(buf) - 1);
498 int ret, i;
499
500 for (i = 1; i <= n; ++i)
501 buf[i] = cpu_to_be16(*seq++);
502
503 i *= 2;
504 ret = i2c_master_send(c, (char *)buf, i);
505 if (ret != i) {
506 v4l2_err(c, "i2c_write_seq: error during transfer (%d)\n", ret);
507 state->error = ret;
508 break;
509 }
510
511 count -= n;
512 }
513 }
514
515 #define s5k5baf_write_seq(state, addr, seq...) \
516 s5k5baf_write_arr_seq(state, addr, sizeof((char[]){ seq }), \
517 (const u16 []){ seq });
518
519 /* add items count at the beginning of the list */
520 #define NSEQ(seq...) sizeof((char[]){ seq }), seq
521
522 /*
523 * s5k5baf_write_nseq() - Writes sequences of values to sensor memory via i2c
524 * @nseq: sequence of u16 words in format:
525 * (N, address, value[1]...value[N-1])*,0
526 * Ex.:
527 * u16 seq[] = { NSEQ(0x4000, 1, 1), NSEQ(0x4010, 640, 480), 0 };
528 * ret = s5k5baf_write_nseq(c, seq);
529 */
530 static void s5k5baf_write_nseq(struct s5k5baf *state, const u16 *nseq)
531 {
532 int count;
533
534 while ((count = *nseq++)) {
535 u16 addr = *nseq++;
536 --count;
537
538 s5k5baf_write_arr_seq(state, addr, count, nseq);
539 nseq += count;
540 }
541 }
542
543 static void s5k5baf_synchronize(struct s5k5baf *state, int timeout, u16 addr)
544 {
545 unsigned long end = jiffies + msecs_to_jiffies(timeout);
546 u16 reg;
547
548 s5k5baf_write(state, addr, 1);
549 do {
550 reg = s5k5baf_read(state, addr);
551 if (state->error || !reg)
552 return;
553 usleep_range(5000, 10000);
554 } while (time_is_after_jiffies(end));
555
556 v4l2_err(&state->sd, "timeout on register synchronize (%#x)\n", addr);
557 state->error = -ETIMEDOUT;
558 }
559
560 static u16 *s5k5baf_fw_get_seq(struct s5k5baf *state, u16 seq_id)
561 {
562 struct s5k5baf_fw *fw = state->fw;
563 u16 *data;
564 int i;
565
566 if (fw == NULL)
567 return NULL;
568
569 data = fw->data + 2 * fw->count;
570
571 for (i = 0; i < fw->count; ++i) {
572 if (fw->seq[i].id == seq_id)
573 return data + fw->seq[i].offset;
574 }
575
576 return NULL;
577 }
578
579 static void s5k5baf_hw_patch(struct s5k5baf *state)
580 {
581 u16 *seq = s5k5baf_fw_get_seq(state, S5K5BAF_FW_ID_PATCH);
582
583 if (seq)
584 s5k5baf_write_nseq(state, seq);
585 }
586
587 static void s5k5baf_hw_set_clocks(struct s5k5baf *state)
588 {
589 unsigned long mclk = state->mclk_frequency / 1000;
590 u16 status;
591 static const u16 nseq_clk_cfg[] = {
592 NSEQ(REG_I_USE_NPVI_CLOCKS,
593 NPVI_CLOCKS, NMIPI_CLOCKS, 0,
594 SCLK_PVI_FREQ / 4, PCLK_MIN_FREQ / 4, PCLK_MAX_FREQ / 4,
595 SCLK_MIPI_FREQ / 4, PCLK_MIN_FREQ / 4, PCLK_MAX_FREQ / 4),
596 NSEQ(REG_I_USE_REGS_API, 1),
597 0
598 };
599
600 s5k5baf_write_seq(state, REG_I_INCLK_FREQ_L, mclk & 0xffff, mclk >> 16);
601 s5k5baf_write_nseq(state, nseq_clk_cfg);
602
603 s5k5baf_synchronize(state, 250, REG_I_INIT_PARAMS_UPDATED);
604 status = s5k5baf_read(state, REG_I_ERROR_INFO);
605 if (!state->error && status) {
606 v4l2_err(&state->sd, "error configuring PLL (%d)\n", status);
607 state->error = -EINVAL;
608 }
609 }
610
611 /* set custom color correction matrices for various illuminations */
612 static void s5k5baf_hw_set_ccm(struct s5k5baf *state)
613 {
614 u16 *seq = s5k5baf_fw_get_seq(state, S5K5BAF_FW_ID_CCM);
615
616 if (seq)
617 s5k5baf_write_nseq(state, seq);
618 }
619
620 /* CIS sensor tuning, based on undocumented android driver code */
621 static void s5k5baf_hw_set_cis(struct s5k5baf *state)
622 {
623 u16 *seq = s5k5baf_fw_get_seq(state, S5K5BAF_FW_ID_CIS);
624
625 if (!seq)
626 return;
627
628 s5k5baf_i2c_write(state, REG_CMDWR_PAGE, PAGE_IF_HW);
629 s5k5baf_write_nseq(state, seq);
630 s5k5baf_i2c_write(state, REG_CMDWR_PAGE, PAGE_IF_SW);
631 }
632
633 static void s5k5baf_hw_sync_cfg(struct s5k5baf *state)
634 {
635 s5k5baf_write(state, REG_G_PREV_CFG_CHG, 1);
636 if (state->apply_crop) {
637 s5k5baf_write(state, REG_G_INPUTS_CHANGE_REQ, 1);
638 s5k5baf_write(state, REG_G_PREV_CFG_BYPASS_CHANGED, 1);
639 }
640 s5k5baf_synchronize(state, 500, REG_G_NEW_CFG_SYNC);
641 }
642 /* Set horizontal and vertical image flipping */
643 static void s5k5baf_hw_set_mirror(struct s5k5baf *state)
644 {
645 u16 flip = state->ctrls.vflip->val | (state->ctrls.vflip->val << 1);
646
647 s5k5baf_write(state, REG_P_PREV_MIRROR(0), flip);
648 if (state->streaming)
649 s5k5baf_hw_sync_cfg(state);
650 }
651
652 static void s5k5baf_hw_set_alg(struct s5k5baf *state, u16 alg, bool enable)
653 {
654 u16 cur_alg, new_alg;
655
656 if (!state->valid_auto_alg)
657 cur_alg = s5k5baf_read(state, REG_DBG_AUTOALG_EN);
658 else
659 cur_alg = state->auto_alg;
660
661 new_alg = enable ? (cur_alg | alg) : (cur_alg & ~alg);
662
663 if (new_alg != cur_alg)
664 s5k5baf_write(state, REG_DBG_AUTOALG_EN, new_alg);
665
666 if (state->error)
667 return;
668
669 state->valid_auto_alg = 1;
670 state->auto_alg = new_alg;
671 }
672
673 /* Configure auto/manual white balance and R/G/B gains */
674 static void s5k5baf_hw_set_awb(struct s5k5baf *state, int awb)
675 {
676 struct s5k5baf_ctrls *ctrls = &state->ctrls;
677
678 if (!awb)
679 s5k5baf_write_seq(state, REG_SF_RGAIN,
680 ctrls->gain_red->val, 1,
681 S5K5BAF_GAIN_GREEN_DEF, 1,
682 ctrls->gain_blue->val, 1,
683 1);
684
685 s5k5baf_hw_set_alg(state, AALG_WB_EN, awb);
686 }
687
688 /* Program FW with exposure time, 'exposure' in us units */
689 static void s5k5baf_hw_set_user_exposure(struct s5k5baf *state, int exposure)
690 {
691 unsigned int time = exposure / 10;
692
693 s5k5baf_write_seq(state, REG_SF_USR_EXPOSURE_L,
694 time & 0xffff, time >> 16, 1);
695 }
696
697 static void s5k5baf_hw_set_user_gain(struct s5k5baf *state, int gain)
698 {
699 s5k5baf_write_seq(state, REG_SF_USR_TOT_GAIN, gain, 1);
700 }
701
702 /* Set auto/manual exposure and total gain */
703 static void s5k5baf_hw_set_auto_exposure(struct s5k5baf *state, int value)
704 {
705 if (value == V4L2_EXPOSURE_AUTO) {
706 s5k5baf_hw_set_alg(state, AALG_AE_EN | AALG_DIVLEI_EN, true);
707 } else {
708 unsigned int exp_time = state->ctrls.exposure->val;
709
710 s5k5baf_hw_set_user_exposure(state, exp_time);
711 s5k5baf_hw_set_user_gain(state, state->ctrls.gain->val);
712 s5k5baf_hw_set_alg(state, AALG_AE_EN | AALG_DIVLEI_EN, false);
713 }
714 }
715
716 static void s5k5baf_hw_set_anti_flicker(struct s5k5baf *state, int v)
717 {
718 if (v == V4L2_CID_POWER_LINE_FREQUENCY_AUTO) {
719 s5k5baf_hw_set_alg(state, AALG_FLICKER_EN, true);
720 } else {
721 /* The V4L2_CID_LINE_FREQUENCY control values match
722 * the register values */
723 s5k5baf_write_seq(state, REG_SF_FLICKER_QUANT, v, 1);
724 s5k5baf_hw_set_alg(state, AALG_FLICKER_EN, false);
725 }
726 }
727
728 static void s5k5baf_hw_set_colorfx(struct s5k5baf *state, int val)
729 {
730 static const u16 colorfx[] = {
731 [V4L2_COLORFX_NONE] = 0,
732 [V4L2_COLORFX_BW] = 1,
733 [V4L2_COLORFX_NEGATIVE] = 2,
734 [V4L2_COLORFX_SEPIA] = 3,
735 [V4L2_COLORFX_SKY_BLUE] = 4,
736 [V4L2_COLORFX_SKETCH] = 5,
737 };
738
739 s5k5baf_write(state, REG_G_SPEC_EFFECTS, colorfx[val]);
740 }
741
742 static int s5k5baf_find_pixfmt(struct v4l2_mbus_framefmt *mf)
743 {
744 int i, c = -1;
745
746 for (i = 0; i < ARRAY_SIZE(s5k5baf_formats); i++) {
747 if (mf->colorspace != s5k5baf_formats[i].colorspace)
748 continue;
749 if (mf->code == s5k5baf_formats[i].code)
750 return i;
751 if (c < 0)
752 c = i;
753 }
754 return (c < 0) ? 0 : c;
755 }
756
757 static int s5k5baf_clear_error(struct s5k5baf *state)
758 {
759 int ret = state->error;
760
761 state->error = 0;
762 return ret;
763 }
764
765 static int s5k5baf_hw_set_video_bus(struct s5k5baf *state)
766 {
767 u16 en_pkts;
768
769 if (state->bus_type == V4L2_MBUS_CSI2)
770 en_pkts = EN_PACKETS_CSI2;
771 else
772 en_pkts = 0;
773
774 s5k5baf_write_seq(state, REG_OIF_EN_MIPI_LANES,
775 state->nlanes, en_pkts, 1);
776
777 return s5k5baf_clear_error(state);
778 }
779
780 static u16 s5k5baf_get_cfg_error(struct s5k5baf *state)
781 {
782 u16 err = s5k5baf_read(state, REG_G_PREV_CFG_ERROR);
783 if (err)
784 s5k5baf_write(state, REG_G_PREV_CFG_ERROR, 0);
785 return err;
786 }
787
788 static void s5k5baf_hw_set_fiv(struct s5k5baf *state, u16 fiv)
789 {
790 s5k5baf_write(state, REG_P_MAX_FR_TIME(0), fiv);
791 s5k5baf_hw_sync_cfg(state);
792 }
793
794 static void s5k5baf_hw_find_min_fiv(struct s5k5baf *state)
795 {
796 u16 err, fiv;
797 int n;
798
799 fiv = s5k5baf_read(state, REG_G_ACTUAL_P_FR_TIME);
800 if (state->error)
801 return;
802
803 for (n = 5; n > 0; --n) {
804 s5k5baf_hw_set_fiv(state, fiv);
805 err = s5k5baf_get_cfg_error(state);
806 if (state->error)
807 return;
808 switch (err) {
809 case CFG_ERROR_RANGE:
810 ++fiv;
811 break;
812 case 0:
813 state->fiv = fiv;
814 v4l2_info(&state->sd,
815 "found valid frame interval: %d00us\n", fiv);
816 return;
817 default:
818 v4l2_err(&state->sd,
819 "error setting frame interval: %d\n", err);
820 state->error = -EINVAL;
821 }
822 }
823 v4l2_err(&state->sd, "cannot find correct frame interval\n");
824 state->error = -ERANGE;
825 }
826
827 static void s5k5baf_hw_validate_cfg(struct s5k5baf *state)
828 {
829 u16 err;
830
831 err = s5k5baf_get_cfg_error(state);
832 if (state->error)
833 return;
834
835 switch (err) {
836 case 0:
837 state->apply_cfg = 1;
838 return;
839 case CFG_ERROR_RANGE:
840 s5k5baf_hw_find_min_fiv(state);
841 if (!state->error)
842 state->apply_cfg = 1;
843 return;
844 default:
845 v4l2_err(&state->sd,
846 "error setting format: %d\n", err);
847 state->error = -EINVAL;
848 }
849 }
850
851 static void s5k5baf_rescale(struct v4l2_rect *r, const struct v4l2_rect *v,
852 const struct v4l2_rect *n,
853 const struct v4l2_rect *d)
854 {
855 r->left = v->left * n->width / d->width;
856 r->top = v->top * n->height / d->height;
857 r->width = v->width * n->width / d->width;
858 r->height = v->height * n->height / d->height;
859 }
860
861 static int s5k5baf_hw_set_crop_rects(struct s5k5baf *state)
862 {
863 struct v4l2_rect *p, r;
864 u16 err;
865 int ret;
866
867 p = &state->crop_sink;
868 s5k5baf_write_seq(state, REG_G_PREVREQ_IN_WIDTH, p->width, p->height,
869 p->left, p->top);
870
871 s5k5baf_rescale(&r, &state->crop_source, &state->crop_sink,
872 &state->compose);
873 s5k5baf_write_seq(state, REG_G_PREVZOOM_IN_WIDTH, r.width, r.height,
874 r.left, r.top);
875
876 s5k5baf_synchronize(state, 500, REG_G_INPUTS_CHANGE_REQ);
877 s5k5baf_synchronize(state, 500, REG_G_PREV_CFG_BYPASS_CHANGED);
878 err = s5k5baf_get_cfg_error(state);
879 ret = s5k5baf_clear_error(state);
880 if (ret < 0)
881 return ret;
882
883 switch (err) {
884 case 0:
885 break;
886 case CFG_ERROR_RANGE:
887 /* retry crop with frame interval set to max */
888 s5k5baf_hw_set_fiv(state, S5K5BAF_MAX_FR_TIME);
889 err = s5k5baf_get_cfg_error(state);
890 ret = s5k5baf_clear_error(state);
891 if (ret < 0)
892 return ret;
893 if (err) {
894 v4l2_err(&state->sd,
895 "crop error on max frame interval: %d\n", err);
896 state->error = -EINVAL;
897 }
898 s5k5baf_hw_set_fiv(state, state->req_fiv);
899 s5k5baf_hw_validate_cfg(state);
900 break;
901 default:
902 v4l2_err(&state->sd, "crop error: %d\n", err);
903 return -EINVAL;
904 }
905
906 if (!state->apply_cfg)
907 return 0;
908
909 p = &state->crop_source;
910 s5k5baf_write_seq(state, REG_P_OUT_WIDTH(0), p->width, p->height);
911 s5k5baf_hw_set_fiv(state, state->req_fiv);
912 s5k5baf_hw_validate_cfg(state);
913
914 return s5k5baf_clear_error(state);
915 }
916
917 static void s5k5baf_hw_set_config(struct s5k5baf *state)
918 {
919 u16 reg_fmt = s5k5baf_formats[state->pixfmt].reg_p_fmt;
920 struct v4l2_rect *r = &state->crop_source;
921
922 s5k5baf_write_seq(state, REG_P_OUT_WIDTH(0),
923 r->width, r->height, reg_fmt,
924 PCLK_MAX_FREQ >> 2, PCLK_MIN_FREQ >> 2,
925 PVI_MASK_MIPI, CLK_MIPI_INDEX,
926 FR_RATE_FIXED, FR_RATE_Q_DYNAMIC,
927 state->req_fiv, S5K5BAF_MIN_FR_TIME);
928 s5k5baf_hw_sync_cfg(state);
929 s5k5baf_hw_validate_cfg(state);
930 }
931
932
933 static void s5k5baf_hw_set_test_pattern(struct s5k5baf *state, int id)
934 {
935 s5k5baf_i2c_write(state, REG_PATTERN_WIDTH, 800);
936 s5k5baf_i2c_write(state, REG_PATTERN_HEIGHT, 511);
937 s5k5baf_i2c_write(state, REG_PATTERN_PARAM, 0);
938 s5k5baf_i2c_write(state, REG_PATTERN_SET, id);
939 }
940
941 static void s5k5baf_gpio_assert(struct s5k5baf *state, int id)
942 {
943 struct s5k5baf_gpio *gpio = &state->gpios[id];
944
945 gpio_set_value(gpio->gpio, gpio->level);
946 }
947
948 static void s5k5baf_gpio_deassert(struct s5k5baf *state, int id)
949 {
950 struct s5k5baf_gpio *gpio = &state->gpios[id];
951
952 gpio_set_value(gpio->gpio, !gpio->level);
953 }
954
955 static int s5k5baf_power_on(struct s5k5baf *state)
956 {
957 int ret;
958
959 ret = regulator_bulk_enable(S5K5BAF_NUM_SUPPLIES, state->supplies);
960 if (ret < 0)
961 goto err;
962
963 ret = clk_set_rate(state->clock, state->mclk_frequency);
964 if (ret < 0)
965 goto err_reg_dis;
966
967 ret = clk_prepare_enable(state->clock);
968 if (ret < 0)
969 goto err_reg_dis;
970
971 v4l2_dbg(1, debug, &state->sd, "clock frequency: %ld\n",
972 clk_get_rate(state->clock));
973
974 s5k5baf_gpio_deassert(state, STBY);
975 usleep_range(50, 100);
976 s5k5baf_gpio_deassert(state, RST);
977 return 0;
978
979 err_reg_dis:
980 regulator_bulk_disable(S5K5BAF_NUM_SUPPLIES, state->supplies);
981 err:
982 v4l2_err(&state->sd, "%s() failed (%d)\n", __func__, ret);
983 return ret;
984 }
985
986 static int s5k5baf_power_off(struct s5k5baf *state)
987 {
988 int ret;
989
990 state->streaming = 0;
991 state->apply_cfg = 0;
992 state->apply_crop = 0;
993
994 s5k5baf_gpio_assert(state, RST);
995 s5k5baf_gpio_assert(state, STBY);
996
997 if (!IS_ERR(state->clock))
998 clk_disable_unprepare(state->clock);
999
1000 ret = regulator_bulk_disable(S5K5BAF_NUM_SUPPLIES,
1001 state->supplies);
1002 if (ret < 0)
1003 v4l2_err(&state->sd, "failed to disable regulators\n");
1004
1005 return 0;
1006 }
1007
1008 static void s5k5baf_hw_init(struct s5k5baf *state)
1009 {
1010 s5k5baf_i2c_write(state, AHB_MSB_ADDR_PTR, PAGE_IF_HW);
1011 s5k5baf_i2c_write(state, REG_CLEAR_HOST_INT, 0);
1012 s5k5baf_i2c_write(state, REG_SW_LOAD_COMPLETE, 1);
1013 s5k5baf_i2c_write(state, REG_CMDRD_PAGE, PAGE_IF_SW);
1014 s5k5baf_i2c_write(state, REG_CMDWR_PAGE, PAGE_IF_SW);
1015 }
1016
1017 /*
1018 * V4L2 subdev core and video operations
1019 */
1020
1021 static void s5k5baf_initialize_data(struct s5k5baf *state)
1022 {
1023 state->pixfmt = 0;
1024 state->req_fiv = 10000 / 15;
1025 state->fiv = state->req_fiv;
1026 state->valid_auto_alg = 0;
1027 }
1028
1029 static int s5k5baf_load_setfile(struct s5k5baf *state)
1030 {
1031 struct i2c_client *c = v4l2_get_subdevdata(&state->sd);
1032 const struct firmware *fw;
1033 int ret;
1034
1035 ret = request_firmware(&fw, S5K5BAF_FW_FILENAME, &c->dev);
1036 if (ret < 0) {
1037 dev_warn(&c->dev, "firmware file (%s) not loaded\n",
1038 S5K5BAF_FW_FILENAME);
1039 return ret;
1040 }
1041
1042 ret = s5k5baf_fw_parse(&c->dev, &state->fw, fw->size / 2,
1043 (__le16 *)fw->data);
1044
1045 release_firmware(fw);
1046
1047 return ret;
1048 }
1049
1050 static int s5k5baf_set_power(struct v4l2_subdev *sd, int on)
1051 {
1052 struct s5k5baf *state = to_s5k5baf(sd);
1053 int ret = 0;
1054
1055 mutex_lock(&state->lock);
1056
1057 if (state->power != !on)
1058 goto out;
1059
1060 if (on) {
1061 if (state->fw == NULL)
1062 s5k5baf_load_setfile(state);
1063
1064 s5k5baf_initialize_data(state);
1065 ret = s5k5baf_power_on(state);
1066 if (ret < 0)
1067 goto out;
1068
1069 s5k5baf_hw_init(state);
1070 s5k5baf_hw_patch(state);
1071 s5k5baf_i2c_write(state, REG_SET_HOST_INT, 1);
1072 s5k5baf_hw_set_clocks(state);
1073
1074 ret = s5k5baf_hw_set_video_bus(state);
1075 if (ret < 0)
1076 goto out;
1077
1078 s5k5baf_hw_set_cis(state);
1079 s5k5baf_hw_set_ccm(state);
1080
1081 ret = s5k5baf_clear_error(state);
1082 if (!ret)
1083 state->power++;
1084 } else {
1085 s5k5baf_power_off(state);
1086 state->power--;
1087 }
1088
1089 out:
1090 mutex_unlock(&state->lock);
1091
1092 if (!ret && on)
1093 ret = v4l2_ctrl_handler_setup(&state->ctrls.handler);
1094
1095 return ret;
1096 }
1097
1098 static void s5k5baf_hw_set_stream(struct s5k5baf *state, int enable)
1099 {
1100 s5k5baf_write_seq(state, REG_G_ENABLE_PREV, enable, 1);
1101 }
1102
1103 static int s5k5baf_s_stream(struct v4l2_subdev *sd, int on)
1104 {
1105 struct s5k5baf *state = to_s5k5baf(sd);
1106 int ret;
1107
1108 mutex_lock(&state->lock);
1109
1110 if (state->streaming == !!on) {
1111 ret = 0;
1112 goto out;
1113 }
1114
1115 if (on) {
1116 s5k5baf_hw_set_config(state);
1117 ret = s5k5baf_hw_set_crop_rects(state);
1118 if (ret < 0)
1119 goto out;
1120 s5k5baf_hw_set_stream(state, 1);
1121 s5k5baf_i2c_write(state, 0xb0cc, 0x000b);
1122 } else {
1123 s5k5baf_hw_set_stream(state, 0);
1124 }
1125 ret = s5k5baf_clear_error(state);
1126 if (!ret)
1127 state->streaming = !state->streaming;
1128
1129 out:
1130 mutex_unlock(&state->lock);
1131
1132 return ret;
1133 }
1134
1135 static int s5k5baf_g_frame_interval(struct v4l2_subdev *sd,
1136 struct v4l2_subdev_frame_interval *fi)
1137 {
1138 struct s5k5baf *state = to_s5k5baf(sd);
1139
1140 mutex_lock(&state->lock);
1141 fi->interval.numerator = state->fiv;
1142 fi->interval.denominator = 10000;
1143 mutex_unlock(&state->lock);
1144
1145 return 0;
1146 }
1147
1148 static void s5k5baf_set_frame_interval(struct s5k5baf *state,
1149 struct v4l2_subdev_frame_interval *fi)
1150 {
1151 struct v4l2_fract *i = &fi->interval;
1152
1153 if (fi->interval.denominator == 0)
1154 state->req_fiv = S5K5BAF_MAX_FR_TIME;
1155 else
1156 state->req_fiv = clamp_t(u32,
1157 i->numerator * 10000 / i->denominator,
1158 S5K5BAF_MIN_FR_TIME,
1159 S5K5BAF_MAX_FR_TIME);
1160
1161 state->fiv = state->req_fiv;
1162 if (state->apply_cfg) {
1163 s5k5baf_hw_set_fiv(state, state->req_fiv);
1164 s5k5baf_hw_validate_cfg(state);
1165 }
1166 *i = (struct v4l2_fract){ state->fiv, 10000 };
1167 if (state->fiv == state->req_fiv)
1168 v4l2_info(&state->sd, "frame interval changed to %d00us\n",
1169 state->fiv);
1170 }
1171
1172 static int s5k5baf_s_frame_interval(struct v4l2_subdev *sd,
1173 struct v4l2_subdev_frame_interval *fi)
1174 {
1175 struct s5k5baf *state = to_s5k5baf(sd);
1176
1177 mutex_lock(&state->lock);
1178 s5k5baf_set_frame_interval(state, fi);
1179 mutex_unlock(&state->lock);
1180 return 0;
1181 }
1182
1183 /*
1184 * V4L2 subdev pad level and video operations
1185 */
1186 static int s5k5baf_enum_frame_interval(struct v4l2_subdev *sd,
1187 struct v4l2_subdev_pad_config *cfg,
1188 struct v4l2_subdev_frame_interval_enum *fie)
1189 {
1190 if (fie->index > S5K5BAF_MAX_FR_TIME - S5K5BAF_MIN_FR_TIME ||
1191 fie->pad != PAD_CIS)
1192 return -EINVAL;
1193
1194 v4l_bound_align_image(&fie->width, S5K5BAF_WIN_WIDTH_MIN,
1195 S5K5BAF_CIS_WIDTH, 1,
1196 &fie->height, S5K5BAF_WIN_HEIGHT_MIN,
1197 S5K5BAF_CIS_HEIGHT, 1, 0);
1198
1199 fie->interval.numerator = S5K5BAF_MIN_FR_TIME + fie->index;
1200 fie->interval.denominator = 10000;
1201
1202 return 0;
1203 }
1204
1205 static int s5k5baf_enum_mbus_code(struct v4l2_subdev *sd,
1206 struct v4l2_subdev_pad_config *cfg,
1207 struct v4l2_subdev_mbus_code_enum *code)
1208 {
1209 if (code->pad == PAD_CIS) {
1210 if (code->index > 0)
1211 return -EINVAL;
1212 code->code = MEDIA_BUS_FMT_FIXED;
1213 return 0;
1214 }
1215
1216 if (code->index >= ARRAY_SIZE(s5k5baf_formats))
1217 return -EINVAL;
1218
1219 code->code = s5k5baf_formats[code->index].code;
1220 return 0;
1221 }
1222
1223 static int s5k5baf_enum_frame_size(struct v4l2_subdev *sd,
1224 struct v4l2_subdev_pad_config *cfg,
1225 struct v4l2_subdev_frame_size_enum *fse)
1226 {
1227 int i;
1228
1229 if (fse->index > 0)
1230 return -EINVAL;
1231
1232 if (fse->pad == PAD_CIS) {
1233 fse->code = MEDIA_BUS_FMT_FIXED;
1234 fse->min_width = S5K5BAF_CIS_WIDTH;
1235 fse->max_width = S5K5BAF_CIS_WIDTH;
1236 fse->min_height = S5K5BAF_CIS_HEIGHT;
1237 fse->max_height = S5K5BAF_CIS_HEIGHT;
1238 return 0;
1239 }
1240
1241 i = ARRAY_SIZE(s5k5baf_formats);
1242 while (--i)
1243 if (fse->code == s5k5baf_formats[i].code)
1244 break;
1245 fse->code = s5k5baf_formats[i].code;
1246 fse->min_width = S5K5BAF_WIN_WIDTH_MIN;
1247 fse->max_width = S5K5BAF_CIS_WIDTH;
1248 fse->max_height = S5K5BAF_WIN_HEIGHT_MIN;
1249 fse->min_height = S5K5BAF_CIS_HEIGHT;
1250
1251 return 0;
1252 }
1253
1254 static void s5k5baf_try_cis_format(struct v4l2_mbus_framefmt *mf)
1255 {
1256 mf->width = S5K5BAF_CIS_WIDTH;
1257 mf->height = S5K5BAF_CIS_HEIGHT;
1258 mf->code = MEDIA_BUS_FMT_FIXED;
1259 mf->colorspace = V4L2_COLORSPACE_JPEG;
1260 mf->field = V4L2_FIELD_NONE;
1261 }
1262
1263 static int s5k5baf_try_isp_format(struct v4l2_mbus_framefmt *mf)
1264 {
1265 int pixfmt;
1266
1267 v4l_bound_align_image(&mf->width, S5K5BAF_WIN_WIDTH_MIN,
1268 S5K5BAF_CIS_WIDTH, 1,
1269 &mf->height, S5K5BAF_WIN_HEIGHT_MIN,
1270 S5K5BAF_CIS_HEIGHT, 1, 0);
1271
1272 pixfmt = s5k5baf_find_pixfmt(mf);
1273
1274 mf->colorspace = s5k5baf_formats[pixfmt].colorspace;
1275 mf->code = s5k5baf_formats[pixfmt].code;
1276 mf->field = V4L2_FIELD_NONE;
1277
1278 return pixfmt;
1279 }
1280
1281 static int s5k5baf_get_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg,
1282 struct v4l2_subdev_format *fmt)
1283 {
1284 struct s5k5baf *state = to_s5k5baf(sd);
1285 const struct s5k5baf_pixfmt *pixfmt;
1286 struct v4l2_mbus_framefmt *mf;
1287
1288 if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
1289 mf = v4l2_subdev_get_try_format(sd, cfg, fmt->pad);
1290 fmt->format = *mf;
1291 return 0;
1292 }
1293
1294 mf = &fmt->format;
1295 if (fmt->pad == PAD_CIS) {
1296 s5k5baf_try_cis_format(mf);
1297 return 0;
1298 }
1299 mf->field = V4L2_FIELD_NONE;
1300 mutex_lock(&state->lock);
1301 pixfmt = &s5k5baf_formats[state->pixfmt];
1302 mf->width = state->crop_source.width;
1303 mf->height = state->crop_source.height;
1304 mf->code = pixfmt->code;
1305 mf->colorspace = pixfmt->colorspace;
1306 mutex_unlock(&state->lock);
1307
1308 return 0;
1309 }
1310
1311 static int s5k5baf_set_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg,
1312 struct v4l2_subdev_format *fmt)
1313 {
1314 struct v4l2_mbus_framefmt *mf = &fmt->format;
1315 struct s5k5baf *state = to_s5k5baf(sd);
1316 const struct s5k5baf_pixfmt *pixfmt;
1317 int ret = 0;
1318
1319 mf->field = V4L2_FIELD_NONE;
1320
1321 if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
1322 *v4l2_subdev_get_try_format(sd, cfg, fmt->pad) = *mf;
1323 return 0;
1324 }
1325
1326 if (fmt->pad == PAD_CIS) {
1327 s5k5baf_try_cis_format(mf);
1328 return 0;
1329 }
1330
1331 mutex_lock(&state->lock);
1332
1333 if (state->streaming) {
1334 mutex_unlock(&state->lock);
1335 return -EBUSY;
1336 }
1337
1338 state->pixfmt = s5k5baf_try_isp_format(mf);
1339 pixfmt = &s5k5baf_formats[state->pixfmt];
1340 mf->code = pixfmt->code;
1341 mf->colorspace = pixfmt->colorspace;
1342 mf->width = state->crop_source.width;
1343 mf->height = state->crop_source.height;
1344
1345 mutex_unlock(&state->lock);
1346 return ret;
1347 }
1348
1349 enum selection_rect { R_CIS, R_CROP_SINK, R_COMPOSE, R_CROP_SOURCE, R_INVALID };
1350
1351 static enum selection_rect s5k5baf_get_sel_rect(u32 pad, u32 target)
1352 {
1353 switch (target) {
1354 case V4L2_SEL_TGT_CROP_BOUNDS:
1355 return pad ? R_COMPOSE : R_CIS;
1356 case V4L2_SEL_TGT_CROP:
1357 return pad ? R_CROP_SOURCE : R_CROP_SINK;
1358 case V4L2_SEL_TGT_COMPOSE_BOUNDS:
1359 return pad ? R_INVALID : R_CROP_SINK;
1360 case V4L2_SEL_TGT_COMPOSE:
1361 return pad ? R_INVALID : R_COMPOSE;
1362 default:
1363 return R_INVALID;
1364 }
1365 }
1366
1367 static int s5k5baf_is_bound_target(u32 target)
1368 {
1369 return target == V4L2_SEL_TGT_CROP_BOUNDS ||
1370 target == V4L2_SEL_TGT_COMPOSE_BOUNDS;
1371 }
1372
1373 static int s5k5baf_get_selection(struct v4l2_subdev *sd,
1374 struct v4l2_subdev_pad_config *cfg,
1375 struct v4l2_subdev_selection *sel)
1376 {
1377 static enum selection_rect rtype;
1378 struct s5k5baf *state = to_s5k5baf(sd);
1379
1380 rtype = s5k5baf_get_sel_rect(sel->pad, sel->target);
1381
1382 switch (rtype) {
1383 case R_INVALID:
1384 return -EINVAL;
1385 case R_CIS:
1386 sel->r = s5k5baf_cis_rect;
1387 return 0;
1388 default:
1389 break;
1390 }
1391
1392 if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
1393 if (rtype == R_COMPOSE)
1394 sel->r = *v4l2_subdev_get_try_compose(sd, cfg, sel->pad);
1395 else
1396 sel->r = *v4l2_subdev_get_try_crop(sd, cfg, sel->pad);
1397 return 0;
1398 }
1399
1400 mutex_lock(&state->lock);
1401 switch (rtype) {
1402 case R_CROP_SINK:
1403 sel->r = state->crop_sink;
1404 break;
1405 case R_COMPOSE:
1406 sel->r = state->compose;
1407 break;
1408 case R_CROP_SOURCE:
1409 sel->r = state->crop_source;
1410 break;
1411 default:
1412 break;
1413 }
1414 if (s5k5baf_is_bound_target(sel->target)) {
1415 sel->r.left = 0;
1416 sel->r.top = 0;
1417 }
1418 mutex_unlock(&state->lock);
1419
1420 return 0;
1421 }
1422
1423 /* bounds range [start, start+len) to [0, max) and aligns to 2 */
1424 static void s5k5baf_bound_range(u32 *start, u32 *len, u32 max)
1425 {
1426 if (*len > max)
1427 *len = max;
1428 if (*start + *len > max)
1429 *start = max - *len;
1430 *start &= ~1;
1431 *len &= ~1;
1432 if (*len < S5K5BAF_WIN_WIDTH_MIN)
1433 *len = S5K5BAF_WIN_WIDTH_MIN;
1434 }
1435
1436 static void s5k5baf_bound_rect(struct v4l2_rect *r, u32 width, u32 height)
1437 {
1438 s5k5baf_bound_range(&r->left, &r->width, width);
1439 s5k5baf_bound_range(&r->top, &r->height, height);
1440 }
1441
1442 static void s5k5baf_set_rect_and_adjust(struct v4l2_rect **rects,
1443 enum selection_rect first,
1444 struct v4l2_rect *v)
1445 {
1446 struct v4l2_rect *r, *br;
1447 enum selection_rect i = first;
1448
1449 *rects[first] = *v;
1450 do {
1451 r = rects[i];
1452 br = rects[i - 1];
1453 s5k5baf_bound_rect(r, br->width, br->height);
1454 } while (++i != R_INVALID);
1455 *v = *rects[first];
1456 }
1457
1458 static bool s5k5baf_cmp_rect(const struct v4l2_rect *r1,
1459 const struct v4l2_rect *r2)
1460 {
1461 return !memcmp(r1, r2, sizeof(*r1));
1462 }
1463
1464 static int s5k5baf_set_selection(struct v4l2_subdev *sd,
1465 struct v4l2_subdev_pad_config *cfg,
1466 struct v4l2_subdev_selection *sel)
1467 {
1468 static enum selection_rect rtype;
1469 struct s5k5baf *state = to_s5k5baf(sd);
1470 struct v4l2_rect **rects;
1471 int ret = 0;
1472
1473 rtype = s5k5baf_get_sel_rect(sel->pad, sel->target);
1474 if (rtype == R_INVALID || s5k5baf_is_bound_target(sel->target))
1475 return -EINVAL;
1476
1477 /* allow only scaling on compose */
1478 if (rtype == R_COMPOSE) {
1479 sel->r.left = 0;
1480 sel->r.top = 0;
1481 }
1482
1483 if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
1484 rects = (struct v4l2_rect * []) {
1485 &s5k5baf_cis_rect,
1486 v4l2_subdev_get_try_crop(sd, cfg, PAD_CIS),
1487 v4l2_subdev_get_try_compose(sd, cfg, PAD_CIS),
1488 v4l2_subdev_get_try_crop(sd, cfg, PAD_OUT)
1489 };
1490 s5k5baf_set_rect_and_adjust(rects, rtype, &sel->r);
1491 return 0;
1492 }
1493
1494 rects = (struct v4l2_rect * []) {
1495 &s5k5baf_cis_rect,
1496 &state->crop_sink,
1497 &state->compose,
1498 &state->crop_source
1499 };
1500 mutex_lock(&state->lock);
1501 if (state->streaming) {
1502 /* adjust sel->r to avoid output resolution change */
1503 if (rtype < R_CROP_SOURCE) {
1504 if (sel->r.width < state->crop_source.width)
1505 sel->r.width = state->crop_source.width;
1506 if (sel->r.height < state->crop_source.height)
1507 sel->r.height = state->crop_source.height;
1508 } else {
1509 sel->r.width = state->crop_source.width;
1510 sel->r.height = state->crop_source.height;
1511 }
1512 }
1513 s5k5baf_set_rect_and_adjust(rects, rtype, &sel->r);
1514 if (!s5k5baf_cmp_rect(&state->crop_sink, &s5k5baf_cis_rect) ||
1515 !s5k5baf_cmp_rect(&state->compose, &s5k5baf_cis_rect))
1516 state->apply_crop = 1;
1517 if (state->streaming)
1518 ret = s5k5baf_hw_set_crop_rects(state);
1519 mutex_unlock(&state->lock);
1520
1521 return ret;
1522 }
1523
1524 static const struct v4l2_subdev_pad_ops s5k5baf_cis_pad_ops = {
1525 .enum_mbus_code = s5k5baf_enum_mbus_code,
1526 .enum_frame_size = s5k5baf_enum_frame_size,
1527 .get_fmt = s5k5baf_get_fmt,
1528 .set_fmt = s5k5baf_set_fmt,
1529 };
1530
1531 static const struct v4l2_subdev_pad_ops s5k5baf_pad_ops = {
1532 .enum_mbus_code = s5k5baf_enum_mbus_code,
1533 .enum_frame_size = s5k5baf_enum_frame_size,
1534 .enum_frame_interval = s5k5baf_enum_frame_interval,
1535 .get_fmt = s5k5baf_get_fmt,
1536 .set_fmt = s5k5baf_set_fmt,
1537 .get_selection = s5k5baf_get_selection,
1538 .set_selection = s5k5baf_set_selection,
1539 };
1540
1541 static const struct v4l2_subdev_video_ops s5k5baf_video_ops = {
1542 .g_frame_interval = s5k5baf_g_frame_interval,
1543 .s_frame_interval = s5k5baf_s_frame_interval,
1544 .s_stream = s5k5baf_s_stream,
1545 };
1546
1547 /*
1548 * V4L2 subdev controls
1549 */
1550
1551 static int s5k5baf_s_ctrl(struct v4l2_ctrl *ctrl)
1552 {
1553 struct v4l2_subdev *sd = ctrl_to_sd(ctrl);
1554 struct s5k5baf *state = to_s5k5baf(sd);
1555 int ret;
1556
1557 v4l2_dbg(1, debug, sd, "ctrl: %s, value: %d\n", ctrl->name, ctrl->val);
1558
1559 mutex_lock(&state->lock);
1560
1561 if (state->power == 0)
1562 goto unlock;
1563
1564 switch (ctrl->id) {
1565 case V4L2_CID_AUTO_WHITE_BALANCE:
1566 s5k5baf_hw_set_awb(state, ctrl->val);
1567 break;
1568
1569 case V4L2_CID_BRIGHTNESS:
1570 s5k5baf_write(state, REG_USER_BRIGHTNESS, ctrl->val);
1571 break;
1572
1573 case V4L2_CID_COLORFX:
1574 s5k5baf_hw_set_colorfx(state, ctrl->val);
1575 break;
1576
1577 case V4L2_CID_CONTRAST:
1578 s5k5baf_write(state, REG_USER_CONTRAST, ctrl->val);
1579 break;
1580
1581 case V4L2_CID_EXPOSURE_AUTO:
1582 s5k5baf_hw_set_auto_exposure(state, ctrl->val);
1583 break;
1584
1585 case V4L2_CID_HFLIP:
1586 s5k5baf_hw_set_mirror(state);
1587 break;
1588
1589 case V4L2_CID_POWER_LINE_FREQUENCY:
1590 s5k5baf_hw_set_anti_flicker(state, ctrl->val);
1591 break;
1592
1593 case V4L2_CID_SATURATION:
1594 s5k5baf_write(state, REG_USER_SATURATION, ctrl->val);
1595 break;
1596
1597 case V4L2_CID_SHARPNESS:
1598 s5k5baf_write(state, REG_USER_SHARPBLUR, ctrl->val);
1599 break;
1600
1601 case V4L2_CID_WHITE_BALANCE_TEMPERATURE:
1602 s5k5baf_write(state, REG_P_COLORTEMP(0), ctrl->val);
1603 if (state->apply_cfg)
1604 s5k5baf_hw_sync_cfg(state);
1605 break;
1606
1607 case V4L2_CID_TEST_PATTERN:
1608 s5k5baf_hw_set_test_pattern(state, ctrl->val);
1609 break;
1610 }
1611 unlock:
1612 ret = s5k5baf_clear_error(state);
1613 mutex_unlock(&state->lock);
1614 return ret;
1615 }
1616
1617 static const struct v4l2_ctrl_ops s5k5baf_ctrl_ops = {
1618 .s_ctrl = s5k5baf_s_ctrl,
1619 };
1620
1621 static const char * const s5k5baf_test_pattern_menu[] = {
1622 "Disabled",
1623 "Blank",
1624 "Bars",
1625 "Gradients",
1626 "Textile",
1627 "Textile2",
1628 "Squares"
1629 };
1630
1631 static int s5k5baf_initialize_ctrls(struct s5k5baf *state)
1632 {
1633 const struct v4l2_ctrl_ops *ops = &s5k5baf_ctrl_ops;
1634 struct s5k5baf_ctrls *ctrls = &state->ctrls;
1635 struct v4l2_ctrl_handler *hdl = &ctrls->handler;
1636 int ret;
1637
1638 ret = v4l2_ctrl_handler_init(hdl, 16);
1639 if (ret < 0) {
1640 v4l2_err(&state->sd, "cannot init ctrl handler (%d)\n", ret);
1641 return ret;
1642 }
1643
1644 /* Auto white balance cluster */
1645 ctrls->awb = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_AUTO_WHITE_BALANCE,
1646 0, 1, 1, 1);
1647 ctrls->gain_red = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_RED_BALANCE,
1648 0, 255, 1, S5K5BAF_GAIN_RED_DEF);
1649 ctrls->gain_blue = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_BLUE_BALANCE,
1650 0, 255, 1, S5K5BAF_GAIN_BLUE_DEF);
1651 v4l2_ctrl_auto_cluster(3, &ctrls->awb, 0, false);
1652
1653 ctrls->hflip = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_HFLIP, 0, 1, 1, 0);
1654 ctrls->vflip = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_VFLIP, 0, 1, 1, 0);
1655 v4l2_ctrl_cluster(2, &ctrls->hflip);
1656
1657 ctrls->auto_exp = v4l2_ctrl_new_std_menu(hdl, ops,
1658 V4L2_CID_EXPOSURE_AUTO,
1659 V4L2_EXPOSURE_MANUAL, 0, V4L2_EXPOSURE_AUTO);
1660 /* Exposure time: x 1 us */
1661 ctrls->exposure = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_EXPOSURE,
1662 0, 6000000U, 1, 100000U);
1663 /* Total gain: 256 <=> 1x */
1664 ctrls->gain = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_GAIN,
1665 0, 256, 1, 256);
1666 v4l2_ctrl_auto_cluster(3, &ctrls->auto_exp, 0, false);
1667
1668 v4l2_ctrl_new_std_menu(hdl, ops, V4L2_CID_POWER_LINE_FREQUENCY,
1669 V4L2_CID_POWER_LINE_FREQUENCY_AUTO, 0,
1670 V4L2_CID_POWER_LINE_FREQUENCY_AUTO);
1671
1672 v4l2_ctrl_new_std_menu(hdl, ops, V4L2_CID_COLORFX,
1673 V4L2_COLORFX_SKY_BLUE, ~0x6f, V4L2_COLORFX_NONE);
1674
1675 v4l2_ctrl_new_std(hdl, ops, V4L2_CID_WHITE_BALANCE_TEMPERATURE,
1676 0, 256, 1, 0);
1677
1678 v4l2_ctrl_new_std(hdl, ops, V4L2_CID_SATURATION, -127, 127, 1, 0);
1679 v4l2_ctrl_new_std(hdl, ops, V4L2_CID_BRIGHTNESS, -127, 127, 1, 0);
1680 v4l2_ctrl_new_std(hdl, ops, V4L2_CID_CONTRAST, -127, 127, 1, 0);
1681 v4l2_ctrl_new_std(hdl, ops, V4L2_CID_SHARPNESS, -127, 127, 1, 0);
1682
1683 v4l2_ctrl_new_std_menu_items(hdl, ops, V4L2_CID_TEST_PATTERN,
1684 ARRAY_SIZE(s5k5baf_test_pattern_menu) - 1,
1685 0, 0, s5k5baf_test_pattern_menu);
1686
1687 if (hdl->error) {
1688 v4l2_err(&state->sd, "error creating controls (%d)\n",
1689 hdl->error);
1690 ret = hdl->error;
1691 v4l2_ctrl_handler_free(hdl);
1692 return ret;
1693 }
1694
1695 state->sd.ctrl_handler = hdl;
1696 return 0;
1697 }
1698
1699 /*
1700 * V4L2 subdev internal operations
1701 */
1702 static int s5k5baf_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
1703 {
1704 struct v4l2_mbus_framefmt *mf;
1705
1706 mf = v4l2_subdev_get_try_format(sd, fh->pad, PAD_CIS);
1707 s5k5baf_try_cis_format(mf);
1708
1709 if (s5k5baf_is_cis_subdev(sd))
1710 return 0;
1711
1712 mf = v4l2_subdev_get_try_format(sd, fh->pad, PAD_OUT);
1713 mf->colorspace = s5k5baf_formats[0].colorspace;
1714 mf->code = s5k5baf_formats[0].code;
1715 mf->width = s5k5baf_cis_rect.width;
1716 mf->height = s5k5baf_cis_rect.height;
1717 mf->field = V4L2_FIELD_NONE;
1718
1719 *v4l2_subdev_get_try_crop(sd, fh->pad, PAD_CIS) = s5k5baf_cis_rect;
1720 *v4l2_subdev_get_try_compose(sd, fh->pad, PAD_CIS) = s5k5baf_cis_rect;
1721 *v4l2_subdev_get_try_crop(sd, fh->pad, PAD_OUT) = s5k5baf_cis_rect;
1722
1723 return 0;
1724 }
1725
1726 static int s5k5baf_check_fw_revision(struct s5k5baf *state)
1727 {
1728 u16 api_ver = 0, fw_rev = 0, s_id = 0;
1729 int ret;
1730
1731 api_ver = s5k5baf_read(state, REG_FW_APIVER);
1732 fw_rev = s5k5baf_read(state, REG_FW_REVISION) & 0xff;
1733 s_id = s5k5baf_read(state, REG_FW_SENSOR_ID);
1734 ret = s5k5baf_clear_error(state);
1735 if (ret < 0)
1736 return ret;
1737
1738 v4l2_info(&state->sd, "FW API=%#x, revision=%#x sensor_id=%#x\n",
1739 api_ver, fw_rev, s_id);
1740
1741 if (api_ver != S5K5BAF_FW_APIVER) {
1742 v4l2_err(&state->sd, "FW API version not supported\n");
1743 return -ENODEV;
1744 }
1745
1746 return 0;
1747 }
1748
1749 static int s5k5baf_registered(struct v4l2_subdev *sd)
1750 {
1751 struct s5k5baf *state = to_s5k5baf(sd);
1752 int ret;
1753
1754 ret = v4l2_device_register_subdev(sd->v4l2_dev, &state->cis_sd);
1755 if (ret < 0)
1756 v4l2_err(sd, "failed to register subdev %s\n",
1757 state->cis_sd.name);
1758 else
1759 ret = media_create_pad_link(&state->cis_sd.entity, PAD_CIS,
1760 &state->sd.entity, PAD_CIS,
1761 MEDIA_LNK_FL_IMMUTABLE |
1762 MEDIA_LNK_FL_ENABLED);
1763 return ret;
1764 }
1765
1766 static void s5k5baf_unregistered(struct v4l2_subdev *sd)
1767 {
1768 struct s5k5baf *state = to_s5k5baf(sd);
1769 v4l2_device_unregister_subdev(&state->cis_sd);
1770 }
1771
1772 static const struct v4l2_subdev_ops s5k5baf_cis_subdev_ops = {
1773 .pad = &s5k5baf_cis_pad_ops,
1774 };
1775
1776 static const struct v4l2_subdev_internal_ops s5k5baf_cis_subdev_internal_ops = {
1777 .open = s5k5baf_open,
1778 };
1779
1780 static const struct v4l2_subdev_internal_ops s5k5baf_subdev_internal_ops = {
1781 .registered = s5k5baf_registered,
1782 .unregistered = s5k5baf_unregistered,
1783 .open = s5k5baf_open,
1784 };
1785
1786 static const struct v4l2_subdev_core_ops s5k5baf_core_ops = {
1787 .s_power = s5k5baf_set_power,
1788 .log_status = v4l2_ctrl_subdev_log_status,
1789 };
1790
1791 static const struct v4l2_subdev_ops s5k5baf_subdev_ops = {
1792 .core = &s5k5baf_core_ops,
1793 .pad = &s5k5baf_pad_ops,
1794 .video = &s5k5baf_video_ops,
1795 };
1796
1797 static int s5k5baf_configure_gpios(struct s5k5baf *state)
1798 {
1799 static const char * const name[] = { "S5K5BAF_STBY", "S5K5BAF_RST" };
1800 struct i2c_client *c = v4l2_get_subdevdata(&state->sd);
1801 struct s5k5baf_gpio *g = state->gpios;
1802 int ret, i;
1803
1804 for (i = 0; i < NUM_GPIOS; ++i) {
1805 int flags = GPIOF_DIR_OUT;
1806 if (g[i].level)
1807 flags |= GPIOF_INIT_HIGH;
1808 ret = devm_gpio_request_one(&c->dev, g[i].gpio, flags, name[i]);
1809 if (ret < 0) {
1810 v4l2_err(c, "failed to request gpio %s\n", name[i]);
1811 return ret;
1812 }
1813 }
1814 return 0;
1815 }
1816
1817 static int s5k5baf_parse_gpios(struct s5k5baf_gpio *gpios, struct device *dev)
1818 {
1819 static const char * const names[] = {
1820 "stbyn-gpios",
1821 "rstn-gpios",
1822 };
1823 struct device_node *node = dev->of_node;
1824 enum of_gpio_flags flags;
1825 int ret, i;
1826
1827 for (i = 0; i < NUM_GPIOS; ++i) {
1828 ret = of_get_named_gpio_flags(node, names[i], 0, &flags);
1829 if (ret < 0) {
1830 dev_err(dev, "no %s GPIO pin provided\n", names[i]);
1831 return ret;
1832 }
1833 gpios[i].gpio = ret;
1834 gpios[i].level = !(flags & OF_GPIO_ACTIVE_LOW);
1835 }
1836
1837 return 0;
1838 }
1839
1840 static int s5k5baf_parse_device_node(struct s5k5baf *state, struct device *dev)
1841 {
1842 struct device_node *node = dev->of_node;
1843 struct device_node *node_ep;
1844 struct v4l2_of_endpoint ep;
1845 int ret;
1846
1847 if (!node) {
1848 dev_err(dev, "no device-tree node provided\n");
1849 return -EINVAL;
1850 }
1851
1852 ret = of_property_read_u32(node, "clock-frequency",
1853 &state->mclk_frequency);
1854 if (ret < 0) {
1855 state->mclk_frequency = S5K5BAF_DEFAULT_MCLK_FREQ;
1856 dev_info(dev, "using default %u Hz clock frequency\n",
1857 state->mclk_frequency);
1858 }
1859
1860 ret = s5k5baf_parse_gpios(state->gpios, dev);
1861 if (ret < 0)
1862 return ret;
1863
1864 node_ep = of_graph_get_next_endpoint(node, NULL);
1865 if (!node_ep) {
1866 dev_err(dev, "no endpoint defined at node %s\n",
1867 node->full_name);
1868 return -EINVAL;
1869 }
1870
1871 ret = v4l2_of_parse_endpoint(node_ep, &ep);
1872 of_node_put(node_ep);
1873 if (ret)
1874 return ret;
1875
1876 state->bus_type = ep.bus_type;
1877
1878 switch (state->bus_type) {
1879 case V4L2_MBUS_CSI2:
1880 state->nlanes = ep.bus.mipi_csi2.num_data_lanes;
1881 break;
1882 case V4L2_MBUS_PARALLEL:
1883 break;
1884 default:
1885 dev_err(dev, "unsupported bus in endpoint defined at node %s\n",
1886 node->full_name);
1887 return -EINVAL;
1888 }
1889
1890 return 0;
1891 }
1892
1893 static int s5k5baf_configure_subdevs(struct s5k5baf *state,
1894 struct i2c_client *c)
1895 {
1896 struct v4l2_subdev *sd;
1897 int ret;
1898
1899 sd = &state->cis_sd;
1900 v4l2_subdev_init(sd, &s5k5baf_cis_subdev_ops);
1901 sd->owner = THIS_MODULE;
1902 v4l2_set_subdevdata(sd, state);
1903 snprintf(sd->name, sizeof(sd->name), "S5K5BAF-CIS %d-%04x",
1904 i2c_adapter_id(c->adapter), c->addr);
1905
1906 sd->internal_ops = &s5k5baf_cis_subdev_internal_ops;
1907 sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1908
1909 state->cis_pad.flags = MEDIA_PAD_FL_SOURCE;
1910 sd->entity.function = MEDIA_ENT_F_CAM_SENSOR;
1911 ret = media_entity_pads_init(&sd->entity, NUM_CIS_PADS, &state->cis_pad);
1912 if (ret < 0)
1913 goto err;
1914
1915 sd = &state->sd;
1916 v4l2_i2c_subdev_init(sd, c, &s5k5baf_subdev_ops);
1917 snprintf(sd->name, sizeof(sd->name), "S5K5BAF-ISP %d-%04x",
1918 i2c_adapter_id(c->adapter), c->addr);
1919
1920 sd->internal_ops = &s5k5baf_subdev_internal_ops;
1921 sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1922
1923 state->pads[PAD_CIS].flags = MEDIA_PAD_FL_SINK;
1924 state->pads[PAD_OUT].flags = MEDIA_PAD_FL_SOURCE;
1925 sd->entity.function = MEDIA_ENT_F_V4L2_SUBDEV_UNKNOWN;
1926 ret = media_entity_pads_init(&sd->entity, NUM_ISP_PADS, state->pads);
1927
1928 if (!ret)
1929 return 0;
1930
1931 media_entity_cleanup(&state->cis_sd.entity);
1932 err:
1933 dev_err(&c->dev, "cannot init media entity %s\n", sd->name);
1934 return ret;
1935 }
1936
1937 static int s5k5baf_configure_regulators(struct s5k5baf *state)
1938 {
1939 struct i2c_client *c = v4l2_get_subdevdata(&state->sd);
1940 int ret;
1941 int i;
1942
1943 for (i = 0; i < S5K5BAF_NUM_SUPPLIES; i++)
1944 state->supplies[i].supply = s5k5baf_supply_names[i];
1945
1946 ret = devm_regulator_bulk_get(&c->dev, S5K5BAF_NUM_SUPPLIES,
1947 state->supplies);
1948 if (ret < 0)
1949 v4l2_err(c, "failed to get regulators\n");
1950 return ret;
1951 }
1952
1953 static int s5k5baf_probe(struct i2c_client *c,
1954 const struct i2c_device_id *id)
1955 {
1956 struct s5k5baf *state;
1957 int ret;
1958
1959 state = devm_kzalloc(&c->dev, sizeof(*state), GFP_KERNEL);
1960 if (!state)
1961 return -ENOMEM;
1962
1963 mutex_init(&state->lock);
1964 state->crop_sink = s5k5baf_cis_rect;
1965 state->compose = s5k5baf_cis_rect;
1966 state->crop_source = s5k5baf_cis_rect;
1967
1968 ret = s5k5baf_parse_device_node(state, &c->dev);
1969 if (ret < 0)
1970 return ret;
1971
1972 ret = s5k5baf_configure_subdevs(state, c);
1973 if (ret < 0)
1974 return ret;
1975
1976 ret = s5k5baf_configure_gpios(state);
1977 if (ret < 0)
1978 goto err_me;
1979
1980 ret = s5k5baf_configure_regulators(state);
1981 if (ret < 0)
1982 goto err_me;
1983
1984 state->clock = devm_clk_get(state->sd.dev, S5K5BAF_CLK_NAME);
1985 if (IS_ERR(state->clock)) {
1986 ret = -EPROBE_DEFER;
1987 goto err_me;
1988 }
1989
1990 ret = s5k5baf_power_on(state);
1991 if (ret < 0) {
1992 ret = -EPROBE_DEFER;
1993 goto err_me;
1994 }
1995 s5k5baf_hw_init(state);
1996 ret = s5k5baf_check_fw_revision(state);
1997
1998 s5k5baf_power_off(state);
1999 if (ret < 0)
2000 goto err_me;
2001
2002 ret = s5k5baf_initialize_ctrls(state);
2003 if (ret < 0)
2004 goto err_me;
2005
2006 ret = v4l2_async_register_subdev(&state->sd);
2007 if (ret < 0)
2008 goto err_ctrl;
2009
2010 return 0;
2011
2012 err_ctrl:
2013 v4l2_ctrl_handler_free(state->sd.ctrl_handler);
2014 err_me:
2015 media_entity_cleanup(&state->sd.entity);
2016 media_entity_cleanup(&state->cis_sd.entity);
2017 return ret;
2018 }
2019
2020 static int s5k5baf_remove(struct i2c_client *c)
2021 {
2022 struct v4l2_subdev *sd = i2c_get_clientdata(c);
2023 struct s5k5baf *state = to_s5k5baf(sd);
2024
2025 v4l2_async_unregister_subdev(sd);
2026 v4l2_ctrl_handler_free(sd->ctrl_handler);
2027 media_entity_cleanup(&sd->entity);
2028
2029 sd = &state->cis_sd;
2030 v4l2_device_unregister_subdev(sd);
2031 media_entity_cleanup(&sd->entity);
2032
2033 return 0;
2034 }
2035
2036 static const struct i2c_device_id s5k5baf_id[] = {
2037 { S5K5BAF_DRIVER_NAME, 0 },
2038 { },
2039 };
2040 MODULE_DEVICE_TABLE(i2c, s5k5baf_id);
2041
2042 static const struct of_device_id s5k5baf_of_match[] = {
2043 { .compatible = "samsung,s5k5baf" },
2044 { }
2045 };
2046 MODULE_DEVICE_TABLE(of, s5k5baf_of_match);
2047
2048 static struct i2c_driver s5k5baf_i2c_driver = {
2049 .driver = {
2050 .of_match_table = s5k5baf_of_match,
2051 .name = S5K5BAF_DRIVER_NAME
2052 },
2053 .probe = s5k5baf_probe,
2054 .remove = s5k5baf_remove,
2055 .id_table = s5k5baf_id,
2056 };
2057
2058 module_i2c_driver(s5k5baf_i2c_driver);
2059
2060 MODULE_DESCRIPTION("Samsung S5K5BAF(X) UXGA camera driver");
2061 MODULE_AUTHOR("Andrzej Hajda <a.hajda@samsung.com>");
2062 MODULE_LICENSE("GPL v2");
Linux kernel - Deliverables
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