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perf tools: Don't clone maps from parent when synthesizing forks
[linux/fpc-iii.git] / drivers / media / platform / atmel / atmel-isc.c
blobd89e14524d427faa94a04f2ae9402d621788270f
1 /*
2 * Atmel Image Sensor Controller (ISC) driver
3 *
4 * Copyright (C) 2016 Atmel
5 *
6 * Author: Songjun Wu <songjun.wu@microchip.com>
7 *
8 * This program is free software; you may redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; version 2 of the License.
11 *
12 * Sensor-->PFE-->WB-->CFA-->CC-->GAM-->CSC-->CBC-->SUB-->RLP-->DMA
13 *
14 * ISC video pipeline integrates the following submodules:
15 * PFE: Parallel Front End to sample the camera sensor input stream
16 * WB: Programmable white balance in the Bayer domain
17 * CFA: Color filter array interpolation module
18 * CC: Programmable color correction
19 * GAM: Gamma correction
20 * CSC: Programmable color space conversion
21 * CBC: Contrast and Brightness control
22 * SUB: This module performs YCbCr444 to YCbCr420 chrominance subsampling
23 * RLP: This module performs rounding, range limiting
24 * and packing of the incoming data
25 */
26
27 #include <linux/clk.h>
28 #include <linux/clkdev.h>
29 #include <linux/clk-provider.h>
30 #include <linux/delay.h>
31 #include <linux/interrupt.h>
32 #include <linux/math64.h>
33 #include <linux/module.h>
34 #include <linux/of.h>
35 #include <linux/of_graph.h>
36 #include <linux/platform_device.h>
37 #include <linux/pm_runtime.h>
38 #include <linux/regmap.h>
39 #include <linux/videodev2.h>
40
41 #include <media/v4l2-ctrls.h>
42 #include <media/v4l2-device.h>
43 #include <media/v4l2-event.h>
44 #include <media/v4l2-image-sizes.h>
45 #include <media/v4l2-ioctl.h>
46 #include <media/v4l2-fwnode.h>
47 #include <media/v4l2-subdev.h>
48 #include <media/videobuf2-dma-contig.h>
49
50 #include "atmel-isc-regs.h"
51
52 #define ATMEL_ISC_NAME "atmel_isc"
53
54 #define ISC_MAX_SUPPORT_WIDTH 2592
55 #define ISC_MAX_SUPPORT_HEIGHT 1944
56
57 #define ISC_CLK_MAX_DIV 255
58
59 enum isc_clk_id {
60 ISC_ISPCK = 0,
61 ISC_MCK = 1,
62 };
63
64 struct isc_clk {
65 struct clk_hw hw;
66 struct clk *clk;
67 struct regmap *regmap;
68 spinlock_t lock;
69 u8 id;
70 u8 parent_id;
71 u32 div;
72 struct device *dev;
73 };
74
75 #define to_isc_clk(hw) container_of(hw, struct isc_clk, hw)
76
77 struct isc_buffer {
78 struct vb2_v4l2_buffer vb;
79 struct list_head list;
80 };
81
82 struct isc_subdev_entity {
83 struct v4l2_subdev *sd;
84 struct v4l2_async_subdev *asd;
85 struct v4l2_async_notifier notifier;
86
87 u32 pfe_cfg0;
88
89 struct list_head list;
90 };
91
92 /* Indicate the format is generated by the sensor */
93 #define FMT_FLAG_FROM_SENSOR BIT(0)
94 /* Indicate the format is produced by ISC itself */
95 #define FMT_FLAG_FROM_CONTROLLER BIT(1)
96 /* Indicate a Raw Bayer format */
97 #define FMT_FLAG_RAW_FORMAT BIT(2)
98
99 #define FMT_FLAG_RAW_FROM_SENSOR (FMT_FLAG_FROM_SENSOR | \
100 FMT_FLAG_RAW_FORMAT)
101
102 /*
103 * struct isc_format - ISC media bus format information
104 * @fourcc: Fourcc code for this format
105 * @mbus_code: V4L2 media bus format code.
106 * flags: Indicate format from sensor or converted by controller
107 * @bpp: Bits per pixel (when stored in memory)
108 * (when transferred over a bus)
109 * @sd_support: Subdev supports this format
110 * @isc_support: ISC can convert raw format to this format
111 */
112
113 struct isc_format {
114 u32 fourcc;
115 u32 mbus_code;
116 u32 flags;
117 u8 bpp;
118
119 bool sd_support;
120 bool isc_support;
121 };
122
123 /* Pipeline bitmap */
124 #define WB_ENABLE BIT(0)
125 #define CFA_ENABLE BIT(1)
126 #define CC_ENABLE BIT(2)
127 #define GAM_ENABLE BIT(3)
128 #define GAM_BENABLE BIT(4)
129 #define GAM_GENABLE BIT(5)
130 #define GAM_RENABLE BIT(6)
131 #define CSC_ENABLE BIT(7)
132 #define CBC_ENABLE BIT(8)
133 #define SUB422_ENABLE BIT(9)
134 #define SUB420_ENABLE BIT(10)
135
136 #define GAM_ENABLES (GAM_RENABLE | GAM_GENABLE | GAM_BENABLE | GAM_ENABLE)
137
138 struct fmt_config {
139 u32 fourcc;
140
141 u32 pfe_cfg0_bps;
142 u32 cfa_baycfg;
143 u32 rlp_cfg_mode;
144 u32 dcfg_imode;
145 u32 dctrl_dview;
146
147 u32 bits_pipeline;
148 };
149
150 #define HIST_ENTRIES 512
151 #define HIST_BAYER (ISC_HIS_CFG_MODE_B + 1)
152
153 enum{
154 HIST_INIT = 0,
155 HIST_ENABLED,
156 HIST_DISABLED,
157 };
158
159 struct isc_ctrls {
160 struct v4l2_ctrl_handler handler;
161
162 u32 brightness;
163 u32 contrast;
164 u8 gamma_index;
165 u8 awb;
166
167 u32 r_gain;
168 u32 b_gain;
169
170 u32 hist_entry[HIST_ENTRIES];
171 u32 hist_count[HIST_BAYER];
172 u8 hist_id;
173 u8 hist_stat;
174 };
175
176 #define ISC_PIPE_LINE_NODE_NUM 11
177
178 struct isc_device {
179 struct regmap *regmap;
180 struct clk *hclock;
181 struct clk *ispck;
182 struct isc_clk isc_clks[2];
183
184 struct device *dev;
185 struct v4l2_device v4l2_dev;
186 struct video_device video_dev;
187
188 struct vb2_queue vb2_vidq;
189 spinlock_t dma_queue_lock;
190 struct list_head dma_queue;
191 struct isc_buffer *cur_frm;
192 unsigned int sequence;
193 bool stop;
194 struct completion comp;
195
196 struct v4l2_format fmt;
197 struct isc_format **user_formats;
198 unsigned int num_user_formats;
199 const struct isc_format *current_fmt;
200 const struct isc_format *raw_fmt;
201
202 struct isc_ctrls ctrls;
203 struct work_struct awb_work;
204
205 struct mutex lock;
206
207 struct regmap_field *pipeline[ISC_PIPE_LINE_NODE_NUM];
208
209 struct isc_subdev_entity *current_subdev;
210 struct list_head subdev_entities;
211 };
212
213 static struct isc_format formats_list[] = {
214 {
215 .fourcc = V4L2_PIX_FMT_SBGGR8,
216 .mbus_code = MEDIA_BUS_FMT_SBGGR8_1X8,
217 .flags = FMT_FLAG_RAW_FROM_SENSOR,
218 .bpp = 8,
219 },
220 {
221 .fourcc = V4L2_PIX_FMT_SGBRG8,
222 .mbus_code = MEDIA_BUS_FMT_SGBRG8_1X8,
223 .flags = FMT_FLAG_RAW_FROM_SENSOR,
224 .bpp = 8,
225 },
226 {
227 .fourcc = V4L2_PIX_FMT_SGRBG8,
228 .mbus_code = MEDIA_BUS_FMT_SGRBG8_1X8,
229 .flags = FMT_FLAG_RAW_FROM_SENSOR,
230 .bpp = 8,
231 },
232 {
233 .fourcc = V4L2_PIX_FMT_SRGGB8,
234 .mbus_code = MEDIA_BUS_FMT_SRGGB8_1X8,
235 .flags = FMT_FLAG_RAW_FROM_SENSOR,
236 .bpp = 8,
237 },
238 {
239 .fourcc = V4L2_PIX_FMT_SBGGR10,
240 .mbus_code = MEDIA_BUS_FMT_SBGGR10_1X10,
241 .flags = FMT_FLAG_RAW_FROM_SENSOR,
242 .bpp = 16,
243 },
244 {
245 .fourcc = V4L2_PIX_FMT_SGBRG10,
246 .mbus_code = MEDIA_BUS_FMT_SGBRG10_1X10,
247 .flags = FMT_FLAG_RAW_FROM_SENSOR,
248 .bpp = 16,
249 },
250 {
251 .fourcc = V4L2_PIX_FMT_SGRBG10,
252 .mbus_code = MEDIA_BUS_FMT_SGRBG10_1X10,
253 .flags = FMT_FLAG_RAW_FROM_SENSOR,
254 .bpp = 16,
255 },
256 {
257 .fourcc = V4L2_PIX_FMT_SRGGB10,
258 .mbus_code = MEDIA_BUS_FMT_SRGGB10_1X10,
259 .flags = FMT_FLAG_RAW_FROM_SENSOR,
260 .bpp = 16,
261 },
262 {
263 .fourcc = V4L2_PIX_FMT_SBGGR12,
264 .mbus_code = MEDIA_BUS_FMT_SBGGR12_1X12,
265 .flags = FMT_FLAG_RAW_FROM_SENSOR,
266 .bpp = 16,
267 },
268 {
269 .fourcc = V4L2_PIX_FMT_SGBRG12,
270 .mbus_code = MEDIA_BUS_FMT_SGBRG12_1X12,
271 .flags = FMT_FLAG_RAW_FROM_SENSOR,
272 .bpp = 16,
273 },
274 {
275 .fourcc = V4L2_PIX_FMT_SGRBG12,
276 .mbus_code = MEDIA_BUS_FMT_SGRBG12_1X12,
277 .flags = FMT_FLAG_RAW_FROM_SENSOR,
278 .bpp = 16,
279 },
280 {
281 .fourcc = V4L2_PIX_FMT_SRGGB12,
282 .mbus_code = MEDIA_BUS_FMT_SRGGB12_1X12,
283 .flags = FMT_FLAG_RAW_FROM_SENSOR,
284 .bpp = 16,
285 },
286 {
287 .fourcc = V4L2_PIX_FMT_YUV420,
288 .mbus_code = 0x0,
289 .flags = FMT_FLAG_FROM_CONTROLLER,
290 .bpp = 12,
291 },
292 {
293 .fourcc = V4L2_PIX_FMT_YUV422P,
294 .mbus_code = 0x0,
295 .flags = FMT_FLAG_FROM_CONTROLLER,
296 .bpp = 16,
297 },
298 {
299 .fourcc = V4L2_PIX_FMT_GREY,
300 .mbus_code = MEDIA_BUS_FMT_Y8_1X8,
301 .flags = FMT_FLAG_FROM_CONTROLLER |
302 FMT_FLAG_FROM_SENSOR,
303 .bpp = 8,
304 },
305 {
306 .fourcc = V4L2_PIX_FMT_ARGB444,
307 .mbus_code = MEDIA_BUS_FMT_RGB444_2X8_PADHI_LE,
308 .flags = FMT_FLAG_FROM_CONTROLLER,
309 .bpp = 16,
310 },
311 {
312 .fourcc = V4L2_PIX_FMT_ARGB555,
313 .mbus_code = MEDIA_BUS_FMT_RGB555_2X8_PADHI_LE,
314 .flags = FMT_FLAG_FROM_CONTROLLER,
315 .bpp = 16,
316 },
317 {
318 .fourcc = V4L2_PIX_FMT_RGB565,
319 .mbus_code = MEDIA_BUS_FMT_RGB565_2X8_LE,
320 .flags = FMT_FLAG_FROM_CONTROLLER,
321 .bpp = 16,
322 },
323 {
324 .fourcc = V4L2_PIX_FMT_ARGB32,
325 .mbus_code = MEDIA_BUS_FMT_ARGB8888_1X32,
326 .flags = FMT_FLAG_FROM_CONTROLLER,
327 .bpp = 32,
328 },
329 {
330 .fourcc = V4L2_PIX_FMT_YUYV,
331 .mbus_code = MEDIA_BUS_FMT_YUYV8_2X8,
332 .flags = FMT_FLAG_FROM_CONTROLLER |
333 FMT_FLAG_FROM_SENSOR,
334 .bpp = 16,
335 },
336 };
337
338 static struct fmt_config fmt_configs_list[] = {
339 {
340 .fourcc = V4L2_PIX_FMT_SBGGR8,
341 .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT,
342 .cfa_baycfg = ISC_BAY_CFG_BGBG,
343 .rlp_cfg_mode = ISC_RLP_CFG_MODE_DAT8,
344 .dcfg_imode = ISC_DCFG_IMODE_PACKED8,
345 .dctrl_dview = ISC_DCTRL_DVIEW_PACKED,
346 .bits_pipeline = 0x0,
347 },
348 {
349 .fourcc = V4L2_PIX_FMT_SGBRG8,
350 .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT,
351 .cfa_baycfg = ISC_BAY_CFG_GBGB,
352 .rlp_cfg_mode = ISC_RLP_CFG_MODE_DAT8,
353 .dcfg_imode = ISC_DCFG_IMODE_PACKED8,
354 .dctrl_dview = ISC_DCTRL_DVIEW_PACKED,
355 .bits_pipeline = 0x0,
356 },
357 {
358 .fourcc = V4L2_PIX_FMT_SGRBG8,
359 .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT,
360 .cfa_baycfg = ISC_BAY_CFG_GRGR,
361 .rlp_cfg_mode = ISC_RLP_CFG_MODE_DAT8,
362 .dcfg_imode = ISC_DCFG_IMODE_PACKED8,
363 .dctrl_dview = ISC_DCTRL_DVIEW_PACKED,
364 .bits_pipeline = 0x0,
365 },
366 {
367 .fourcc = V4L2_PIX_FMT_SRGGB8,
368 .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT,
369 .cfa_baycfg = ISC_BAY_CFG_RGRG,
370 .rlp_cfg_mode = ISC_RLP_CFG_MODE_DAT8,
371 .dcfg_imode = ISC_DCFG_IMODE_PACKED8,
372 .dctrl_dview = ISC_DCTRL_DVIEW_PACKED,
373 .bits_pipeline = 0x0,
374 },
375 {
376 .fourcc = V4L2_PIX_FMT_SBGGR10,
377 .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TEN,
378 .cfa_baycfg = ISC_BAY_CFG_BGBG,
379 .rlp_cfg_mode = ISC_RLP_CFG_MODE_DAT10,
380 .dcfg_imode = ISC_DCFG_IMODE_PACKED16,
381 .dctrl_dview = ISC_DCTRL_DVIEW_PACKED,
382 .bits_pipeline = 0x0,
383 },
384 {
385 .fourcc = V4L2_PIX_FMT_SGBRG10,
386 .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TEN,
387 .cfa_baycfg = ISC_BAY_CFG_GBGB,
388 .rlp_cfg_mode = ISC_RLP_CFG_MODE_DAT10,
389 .dcfg_imode = ISC_DCFG_IMODE_PACKED16,
390 .dctrl_dview = ISC_DCTRL_DVIEW_PACKED,
391 .bits_pipeline = 0x0,
392 },
393 {
394 .fourcc = V4L2_PIX_FMT_SGRBG10,
395 .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TEN,
396 .cfa_baycfg = ISC_BAY_CFG_GRGR,
397 .rlp_cfg_mode = ISC_RLP_CFG_MODE_DAT10,
398 .dcfg_imode = ISC_DCFG_IMODE_PACKED16,
399 .dctrl_dview = ISC_DCTRL_DVIEW_PACKED,
400 .bits_pipeline = 0x0,
401 },
402 {
403 .fourcc = V4L2_PIX_FMT_SRGGB10,
404 .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TEN,
405 .cfa_baycfg = ISC_BAY_CFG_RGRG,
406 .rlp_cfg_mode = ISC_RLP_CFG_MODE_DAT10,
407 .dcfg_imode = ISC_DCFG_IMODE_PACKED16,
408 .dctrl_dview = ISC_DCTRL_DVIEW_PACKED,
409 .bits_pipeline = 0x0,
410 },
411 {
412 .fourcc = V4L2_PIX_FMT_SBGGR12,
413 .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TWELVE,
414 .cfa_baycfg = ISC_BAY_CFG_BGBG,
415 .rlp_cfg_mode = ISC_RLP_CFG_MODE_DAT12,
416 .dcfg_imode = ISC_DCFG_IMODE_PACKED16,
417 .dctrl_dview = ISC_DCTRL_DVIEW_PACKED,
418 .bits_pipeline = 0x0,
419 },
420 {
421 .fourcc = V4L2_PIX_FMT_SGBRG12,
422 .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TWELVE,
423 .cfa_baycfg = ISC_BAY_CFG_GBGB,
424 .rlp_cfg_mode = ISC_RLP_CFG_MODE_DAT12,
425 .dcfg_imode = ISC_DCFG_IMODE_PACKED16,
426 .dctrl_dview = ISC_DCTRL_DVIEW_PACKED,
427 .bits_pipeline = 0x0
428 },
429 {
430 .fourcc = V4L2_PIX_FMT_SGRBG12,
431 .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TWELVE,
432 .cfa_baycfg = ISC_BAY_CFG_GRGR,
433 .rlp_cfg_mode = ISC_RLP_CFG_MODE_DAT12,
434 .dcfg_imode = ISC_DCFG_IMODE_PACKED16,
435 .dctrl_dview = ISC_DCTRL_DVIEW_PACKED,
436 .bits_pipeline = 0x0,
437 },
438 {
439 .fourcc = V4L2_PIX_FMT_SRGGB12,
440 .pfe_cfg0_bps = ISC_PFG_CFG0_BPS_TWELVE,
441 .cfa_baycfg = ISC_BAY_CFG_RGRG,
442 .rlp_cfg_mode = ISC_RLP_CFG_MODE_DAT12,
443 .dcfg_imode = ISC_DCFG_IMODE_PACKED16,
444 .dctrl_dview = ISC_DCTRL_DVIEW_PACKED,
445 .bits_pipeline = 0x0,
446 },
447 {
448 .fourcc = V4L2_PIX_FMT_YUV420,
449 .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT,
450 .cfa_baycfg = ISC_BAY_CFG_BGBG,
451 .rlp_cfg_mode = ISC_RLP_CFG_MODE_YYCC,
452 .dcfg_imode = ISC_DCFG_IMODE_YC420P,
453 .dctrl_dview = ISC_DCTRL_DVIEW_PLANAR,
454 .bits_pipeline = SUB420_ENABLE | SUB422_ENABLE |
455 CBC_ENABLE | CSC_ENABLE |
456 GAM_ENABLES |
457 CFA_ENABLE | WB_ENABLE,
458 },
459 {
460 .fourcc = V4L2_PIX_FMT_YUV422P,
461 .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT,
462 .cfa_baycfg = ISC_BAY_CFG_BGBG,
463 .rlp_cfg_mode = ISC_RLP_CFG_MODE_YYCC,
464 .dcfg_imode = ISC_DCFG_IMODE_YC422P,
465 .dctrl_dview = ISC_DCTRL_DVIEW_PLANAR,
466 .bits_pipeline = SUB422_ENABLE |
467 CBC_ENABLE | CSC_ENABLE |
468 GAM_ENABLES |
469 CFA_ENABLE | WB_ENABLE,
470 },
471 {
472 .fourcc = V4L2_PIX_FMT_GREY,
473 .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT,
474 .cfa_baycfg = ISC_BAY_CFG_BGBG,
475 .rlp_cfg_mode = ISC_RLP_CFG_MODE_DATY8,
476 .dcfg_imode = ISC_DCFG_IMODE_PACKED8,
477 .dctrl_dview = ISC_DCTRL_DVIEW_PACKED,
478 .bits_pipeline = CBC_ENABLE | CSC_ENABLE |
479 GAM_ENABLES |
480 CFA_ENABLE | WB_ENABLE,
481 },
482 {
483 .fourcc = V4L2_PIX_FMT_ARGB444,
484 .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT,
485 .cfa_baycfg = ISC_BAY_CFG_BGBG,
486 .rlp_cfg_mode = ISC_RLP_CFG_MODE_ARGB444,
487 .dcfg_imode = ISC_DCFG_IMODE_PACKED16,
488 .dctrl_dview = ISC_DCTRL_DVIEW_PACKED,
489 .bits_pipeline = GAM_ENABLES | CFA_ENABLE | WB_ENABLE,
490 },
491 {
492 .fourcc = V4L2_PIX_FMT_ARGB555,
493 .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT,
494 .cfa_baycfg = ISC_BAY_CFG_BGBG,
495 .rlp_cfg_mode = ISC_RLP_CFG_MODE_ARGB555,
496 .dcfg_imode = ISC_DCFG_IMODE_PACKED16,
497 .dctrl_dview = ISC_DCTRL_DVIEW_PACKED,
498 .bits_pipeline = GAM_ENABLES | CFA_ENABLE | WB_ENABLE,
499 },
500 {
501 .fourcc = V4L2_PIX_FMT_RGB565,
502 .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT,
503 .cfa_baycfg = ISC_BAY_CFG_BGBG,
504 .rlp_cfg_mode = ISC_RLP_CFG_MODE_RGB565,
505 .dcfg_imode = ISC_DCFG_IMODE_PACKED16,
506 .dctrl_dview = ISC_DCTRL_DVIEW_PACKED,
507 .bits_pipeline = GAM_ENABLES | CFA_ENABLE | WB_ENABLE,
508 },
509 {
510 .fourcc = V4L2_PIX_FMT_ARGB32,
511 .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT,
512 .cfa_baycfg = ISC_BAY_CFG_BGBG,
513 .rlp_cfg_mode = ISC_RLP_CFG_MODE_ARGB32,
514 .dcfg_imode = ISC_DCFG_IMODE_PACKED32,
515 .dctrl_dview = ISC_DCTRL_DVIEW_PACKED,
516 .bits_pipeline = GAM_ENABLES | CFA_ENABLE | WB_ENABLE,
517 },
518 {
519 .fourcc = V4L2_PIX_FMT_YUYV,
520 .pfe_cfg0_bps = ISC_PFE_CFG0_BPS_EIGHT,
521 .cfa_baycfg = ISC_BAY_CFG_BGBG,
522 .rlp_cfg_mode = ISC_RLP_CFG_MODE_DAT8,
523 .dcfg_imode = ISC_DCFG_IMODE_PACKED8,
524 .dctrl_dview = ISC_DCTRL_DVIEW_PACKED,
525 .bits_pipeline = 0x0
526 },
527 };
528
529 #define GAMMA_MAX 2
530 #define GAMMA_ENTRIES 64
531
532 /* Gamma table with gamma 1/2.2 */
533 static const u32 isc_gamma_table[GAMMA_MAX + 1][GAMMA_ENTRIES] = {
534 /* 0 --> gamma 1/1.8 */
535 { 0x65, 0x66002F, 0x950025, 0xBB0020, 0xDB001D, 0xF8001A,
536 0x1130018, 0x12B0017, 0x1420016, 0x1580014, 0x16D0013, 0x1810012,
537 0x1940012, 0x1A60012, 0x1B80011, 0x1C90010, 0x1DA0010, 0x1EA000F,
538 0x1FA000F, 0x209000F, 0x218000F, 0x227000E, 0x235000E, 0x243000E,
539 0x251000E, 0x25F000D, 0x26C000D, 0x279000D, 0x286000D, 0x293000C,
540 0x2A0000C, 0x2AC000C, 0x2B8000C, 0x2C4000C, 0x2D0000B, 0x2DC000B,
541 0x2E7000B, 0x2F3000B, 0x2FE000B, 0x309000B, 0x314000B, 0x31F000A,
542 0x32A000A, 0x334000B, 0x33F000A, 0x349000A, 0x354000A, 0x35E000A,
543 0x368000A, 0x372000A, 0x37C000A, 0x386000A, 0x3900009, 0x399000A,
544 0x3A30009, 0x3AD0009, 0x3B60009, 0x3BF000A, 0x3C90009, 0x3D20009,
545 0x3DB0009, 0x3E40009, 0x3ED0009, 0x3F60009 },
546
547 /* 1 --> gamma 1/2 */
548 { 0x7F, 0x800034, 0xB50028, 0xDE0021, 0x100001E, 0x11E001B,
549 0x1390019, 0x1520017, 0x16A0015, 0x1800014, 0x1940014, 0x1A80013,
550 0x1BB0012, 0x1CD0011, 0x1DF0010, 0x1EF0010, 0x200000F, 0x20F000F,
551 0x21F000E, 0x22D000F, 0x23C000E, 0x24A000E, 0x258000D, 0x265000D,
552 0x273000C, 0x27F000D, 0x28C000C, 0x299000C, 0x2A5000C, 0x2B1000B,
553 0x2BC000C, 0x2C8000B, 0x2D3000C, 0x2DF000B, 0x2EA000A, 0x2F5000A,
554 0x2FF000B, 0x30A000A, 0x314000B, 0x31F000A, 0x329000A, 0x333000A,
555 0x33D0009, 0x3470009, 0x350000A, 0x35A0009, 0x363000A, 0x36D0009,
556 0x3760009, 0x37F0009, 0x3880009, 0x3910009, 0x39A0009, 0x3A30009,
557 0x3AC0008, 0x3B40009, 0x3BD0008, 0x3C60008, 0x3CE0008, 0x3D60009,
558 0x3DF0008, 0x3E70008, 0x3EF0008, 0x3F70008 },
559
560 /* 2 --> gamma 1/2.2 */
561 { 0x99, 0x9B0038, 0xD4002A, 0xFF0023, 0x122001F, 0x141001B,
562 0x15D0019, 0x1760017, 0x18E0015, 0x1A30015, 0x1B80013, 0x1CC0012,
563 0x1DE0011, 0x1F00010, 0x2010010, 0x2110010, 0x221000F, 0x230000F,
564 0x23F000E, 0x24D000E, 0x25B000D, 0x269000C, 0x276000C, 0x283000C,
565 0x28F000C, 0x29B000C, 0x2A7000C, 0x2B3000B, 0x2BF000B, 0x2CA000B,
566 0x2D5000B, 0x2E0000A, 0x2EB000A, 0x2F5000A, 0x2FF000A, 0x30A000A,
567 0x3140009, 0x31E0009, 0x327000A, 0x3310009, 0x33A0009, 0x3440009,
568 0x34D0009, 0x3560009, 0x35F0009, 0x3680008, 0x3710008, 0x3790009,
569 0x3820008, 0x38A0008, 0x3930008, 0x39B0008, 0x3A30008, 0x3AB0008,
570 0x3B30008, 0x3BB0008, 0x3C30008, 0x3CB0007, 0x3D20008, 0x3DA0007,
571 0x3E20007, 0x3E90007, 0x3F00008, 0x3F80007 },
572 };
573
574 static unsigned int sensor_preferred = 1;
575 module_param(sensor_preferred, uint, 0644);
576 MODULE_PARM_DESC(sensor_preferred,
577 "Sensor is preferred to output the specified format (1-on 0-off), default 1");
578
579 static int isc_wait_clk_stable(struct clk_hw *hw)
580 {
581 struct isc_clk *isc_clk = to_isc_clk(hw);
582 struct regmap *regmap = isc_clk->regmap;
583 unsigned long timeout = jiffies + usecs_to_jiffies(1000);
584 unsigned int status;
585
586 while (time_before(jiffies, timeout)) {
587 regmap_read(regmap, ISC_CLKSR, &status);
588 if (!(status & ISC_CLKSR_SIP))
589 return 0;
590
591 usleep_range(10, 250);
592 }
593
594 return -ETIMEDOUT;
595 }
596
597 static int isc_clk_prepare(struct clk_hw *hw)
598 {
599 struct isc_clk *isc_clk = to_isc_clk(hw);
600
601 if (isc_clk->id == ISC_ISPCK)
602 pm_runtime_get_sync(isc_clk->dev);
603
604 return isc_wait_clk_stable(hw);
605 }
606
607 static void isc_clk_unprepare(struct clk_hw *hw)
608 {
609 struct isc_clk *isc_clk = to_isc_clk(hw);
610
611 isc_wait_clk_stable(hw);
612
613 if (isc_clk->id == ISC_ISPCK)
614 pm_runtime_put_sync(isc_clk->dev);
615 }
616
617 static int isc_clk_enable(struct clk_hw *hw)
618 {
619 struct isc_clk *isc_clk = to_isc_clk(hw);
620 u32 id = isc_clk->id;
621 struct regmap *regmap = isc_clk->regmap;
622 unsigned long flags;
623 unsigned int status;
624
625 dev_dbg(isc_clk->dev, "ISC CLK: %s, div = %d, parent id = %d\n",
626 __func__, isc_clk->div, isc_clk->parent_id);
627
628 spin_lock_irqsave(&isc_clk->lock, flags);
629 regmap_update_bits(regmap, ISC_CLKCFG,
630 ISC_CLKCFG_DIV_MASK(id) | ISC_CLKCFG_SEL_MASK(id),
631 (isc_clk->div << ISC_CLKCFG_DIV_SHIFT(id)) |
632 (isc_clk->parent_id << ISC_CLKCFG_SEL_SHIFT(id)));
633
634 regmap_write(regmap, ISC_CLKEN, ISC_CLK(id));
635 spin_unlock_irqrestore(&isc_clk->lock, flags);
636
637 regmap_read(regmap, ISC_CLKSR, &status);
638 if (status & ISC_CLK(id))
639 return 0;
640 else
641 return -EINVAL;
642 }
643
644 static void isc_clk_disable(struct clk_hw *hw)
645 {
646 struct isc_clk *isc_clk = to_isc_clk(hw);
647 u32 id = isc_clk->id;
648 unsigned long flags;
649
650 spin_lock_irqsave(&isc_clk->lock, flags);
651 regmap_write(isc_clk->regmap, ISC_CLKDIS, ISC_CLK(id));
652 spin_unlock_irqrestore(&isc_clk->lock, flags);
653 }
654
655 static int isc_clk_is_enabled(struct clk_hw *hw)
656 {
657 struct isc_clk *isc_clk = to_isc_clk(hw);
658 u32 status;
659
660 if (isc_clk->id == ISC_ISPCK)
661 pm_runtime_get_sync(isc_clk->dev);
662
663 regmap_read(isc_clk->regmap, ISC_CLKSR, &status);
664
665 if (isc_clk->id == ISC_ISPCK)
666 pm_runtime_put_sync(isc_clk->dev);
667
668 return status & ISC_CLK(isc_clk->id) ? 1 : 0;
669 }
670
671 static unsigned long
672 isc_clk_recalc_rate(struct clk_hw *hw, unsigned long parent_rate)
673 {
674 struct isc_clk *isc_clk = to_isc_clk(hw);
675
676 return DIV_ROUND_CLOSEST(parent_rate, isc_clk->div + 1);
677 }
678
679 static int isc_clk_determine_rate(struct clk_hw *hw,
680 struct clk_rate_request *req)
681 {
682 struct isc_clk *isc_clk = to_isc_clk(hw);
683 long best_rate = -EINVAL;
684 int best_diff = -1;
685 unsigned int i, div;
686
687 for (i = 0; i < clk_hw_get_num_parents(hw); i++) {
688 struct clk_hw *parent;
689 unsigned long parent_rate;
690
691 parent = clk_hw_get_parent_by_index(hw, i);
692 if (!parent)
693 continue;
694
695 parent_rate = clk_hw_get_rate(parent);
696 if (!parent_rate)
697 continue;
698
699 for (div = 1; div < ISC_CLK_MAX_DIV + 2; div++) {
700 unsigned long rate;
701 int diff;
702
703 rate = DIV_ROUND_CLOSEST(parent_rate, div);
704 diff = abs(req->rate - rate);
705
706 if (best_diff < 0 || best_diff > diff) {
707 best_rate = rate;
708 best_diff = diff;
709 req->best_parent_rate = parent_rate;
710 req->best_parent_hw = parent;
711 }
712
713 if (!best_diff || rate < req->rate)
714 break;
715 }
716
717 if (!best_diff)
718 break;
719 }
720
721 dev_dbg(isc_clk->dev,
722 "ISC CLK: %s, best_rate = %ld, parent clk: %s @ %ld\n",
723 __func__, best_rate,
724 __clk_get_name((req->best_parent_hw)->clk),
725 req->best_parent_rate);
726
727 if (best_rate < 0)
728 return best_rate;
729
730 req->rate = best_rate;
731
732 return 0;
733 }
734
735 static int isc_clk_set_parent(struct clk_hw *hw, u8 index)
736 {
737 struct isc_clk *isc_clk = to_isc_clk(hw);
738
739 if (index >= clk_hw_get_num_parents(hw))
740 return -EINVAL;
741
742 isc_clk->parent_id = index;
743
744 return 0;
745 }
746
747 static u8 isc_clk_get_parent(struct clk_hw *hw)
748 {
749 struct isc_clk *isc_clk = to_isc_clk(hw);
750
751 return isc_clk->parent_id;
752 }
753
754 static int isc_clk_set_rate(struct clk_hw *hw,
755 unsigned long rate,
756 unsigned long parent_rate)
757 {
758 struct isc_clk *isc_clk = to_isc_clk(hw);
759 u32 div;
760
761 if (!rate)
762 return -EINVAL;
763
764 div = DIV_ROUND_CLOSEST(parent_rate, rate);
765 if (div > (ISC_CLK_MAX_DIV + 1) || !div)
766 return -EINVAL;
767
768 isc_clk->div = div - 1;
769
770 return 0;
771 }
772
773 static const struct clk_ops isc_clk_ops = {
774 .prepare = isc_clk_prepare,
775 .unprepare = isc_clk_unprepare,
776 .enable = isc_clk_enable,
777 .disable = isc_clk_disable,
778 .is_enabled = isc_clk_is_enabled,
779 .recalc_rate = isc_clk_recalc_rate,
780 .determine_rate = isc_clk_determine_rate,
781 .set_parent = isc_clk_set_parent,
782 .get_parent = isc_clk_get_parent,
783 .set_rate = isc_clk_set_rate,
784 };
785
786 static int isc_clk_register(struct isc_device *isc, unsigned int id)
787 {
788 struct regmap *regmap = isc->regmap;
789 struct device_node *np = isc->dev->of_node;
790 struct isc_clk *isc_clk;
791 struct clk_init_data init;
792 const char *clk_name = np->name;
793 const char *parent_names[3];
794 int num_parents;
795
796 num_parents = of_clk_get_parent_count(np);
797 if (num_parents < 1 || num_parents > 3)
798 return -EINVAL;
799
800 if (num_parents > 2 && id == ISC_ISPCK)
801 num_parents = 2;
802
803 of_clk_parent_fill(np, parent_names, num_parents);
804
805 if (id == ISC_MCK)
806 of_property_read_string(np, "clock-output-names", &clk_name);
807 else
808 clk_name = "isc-ispck";
809
810 init.parent_names = parent_names;
811 init.num_parents = num_parents;
812 init.name = clk_name;
813 init.ops = &isc_clk_ops;
814 init.flags = CLK_SET_RATE_GATE | CLK_SET_PARENT_GATE;
815
816 isc_clk = &isc->isc_clks[id];
817 isc_clk->hw.init = &init;
818 isc_clk->regmap = regmap;
819 isc_clk->id = id;
820 isc_clk->dev = isc->dev;
821 spin_lock_init(&isc_clk->lock);
822
823 isc_clk->clk = clk_register(isc->dev, &isc_clk->hw);
824 if (IS_ERR(isc_clk->clk)) {
825 dev_err(isc->dev, "%s: clock register fail\n", clk_name);
826 return PTR_ERR(isc_clk->clk);
827 } else if (id == ISC_MCK)
828 of_clk_add_provider(np, of_clk_src_simple_get, isc_clk->clk);
829
830 return 0;
831 }
832
833 static int isc_clk_init(struct isc_device *isc)
834 {
835 unsigned int i;
836 int ret;
837
838 for (i = 0; i < ARRAY_SIZE(isc->isc_clks); i++)
839 isc->isc_clks[i].clk = ERR_PTR(-EINVAL);
840
841 for (i = 0; i < ARRAY_SIZE(isc->isc_clks); i++) {
842 ret = isc_clk_register(isc, i);
843 if (ret)
844 return ret;
845 }
846
847 return 0;
848 }
849
850 static void isc_clk_cleanup(struct isc_device *isc)
851 {
852 unsigned int i;
853
854 of_clk_del_provider(isc->dev->of_node);
855
856 for (i = 0; i < ARRAY_SIZE(isc->isc_clks); i++) {
857 struct isc_clk *isc_clk = &isc->isc_clks[i];
858
859 if (!IS_ERR(isc_clk->clk))
860 clk_unregister(isc_clk->clk);
861 }
862 }
863
864 static int isc_queue_setup(struct vb2_queue *vq,
865 unsigned int *nbuffers, unsigned int *nplanes,
866 unsigned int sizes[], struct device *alloc_devs[])
867 {
868 struct isc_device *isc = vb2_get_drv_priv(vq);
869 unsigned int size = isc->fmt.fmt.pix.sizeimage;
870
871 if (*nplanes)
872 return sizes[0] < size ? -EINVAL : 0;
873
874 *nplanes = 1;
875 sizes[0] = size;
876
877 return 0;
878 }
879
880 static int isc_buffer_prepare(struct vb2_buffer *vb)
881 {
882 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
883 struct isc_device *isc = vb2_get_drv_priv(vb->vb2_queue);
884 unsigned long size = isc->fmt.fmt.pix.sizeimage;
885
886 if (vb2_plane_size(vb, 0) < size) {
887 v4l2_err(&isc->v4l2_dev, "buffer too small (%lu < %lu)\n",
888 vb2_plane_size(vb, 0), size);
889 return -EINVAL;
890 }
891
892 vb2_set_plane_payload(vb, 0, size);
893
894 vbuf->field = isc->fmt.fmt.pix.field;
895
896 return 0;
897 }
898
899 static inline bool sensor_is_preferred(const struct isc_format *isc_fmt)
900 {
901 return (sensor_preferred && isc_fmt->sd_support) ||
902 !isc_fmt->isc_support;
903 }
904
905 static struct fmt_config *get_fmt_config(u32 fourcc)
906 {
907 struct fmt_config *config;
908 int i;
909
910 config = &fmt_configs_list[0];
911 for (i = 0; i < ARRAY_SIZE(fmt_configs_list); i++) {
912 if (config->fourcc == fourcc)
913 return config;
914
915 config++;
916 }
917 return NULL;
918 }
919
920 static void isc_start_dma(struct isc_device *isc)
921 {
922 struct regmap *regmap = isc->regmap;
923 struct v4l2_pix_format *pixfmt = &isc->fmt.fmt.pix;
924 u32 sizeimage = pixfmt->sizeimage;
925 struct fmt_config *config = get_fmt_config(isc->current_fmt->fourcc);
926 u32 dctrl_dview;
927 dma_addr_t addr0;
928
929 addr0 = vb2_dma_contig_plane_dma_addr(&isc->cur_frm->vb.vb2_buf, 0);
930 regmap_write(regmap, ISC_DAD0, addr0);
931
932 switch (pixfmt->pixelformat) {
933 case V4L2_PIX_FMT_YUV420:
934 regmap_write(regmap, ISC_DAD1, addr0 + (sizeimage * 2) / 3);
935 regmap_write(regmap, ISC_DAD2, addr0 + (sizeimage * 5) / 6);
936 break;
937 case V4L2_PIX_FMT_YUV422P:
938 regmap_write(regmap, ISC_DAD1, addr0 + sizeimage / 2);
939 regmap_write(regmap, ISC_DAD2, addr0 + (sizeimage * 3) / 4);
940 break;
941 default:
942 break;
943 }
944
945 if (sensor_is_preferred(isc->current_fmt))
946 dctrl_dview = ISC_DCTRL_DVIEW_PACKED;
947 else
948 dctrl_dview = config->dctrl_dview;
949
950 regmap_write(regmap, ISC_DCTRL, dctrl_dview | ISC_DCTRL_IE_IS);
951 regmap_write(regmap, ISC_CTRLEN, ISC_CTRL_CAPTURE);
952 }
953
954 static void isc_set_pipeline(struct isc_device *isc, u32 pipeline)
955 {
956 struct regmap *regmap = isc->regmap;
957 struct isc_ctrls *ctrls = &isc->ctrls;
958 struct fmt_config *config = get_fmt_config(isc->raw_fmt->fourcc);
959 u32 val, bay_cfg;
960 const u32 *gamma;
961 unsigned int i;
962
963 /* WB-->CFA-->CC-->GAM-->CSC-->CBC-->SUB422-->SUB420 */
964 for (i = 0; i < ISC_PIPE_LINE_NODE_NUM; i++) {
965 val = pipeline & BIT(i) ? 1 : 0;
966 regmap_field_write(isc->pipeline[i], val);
967 }
968
969 if (!pipeline)
970 return;
971
972 bay_cfg = config->cfa_baycfg;
973
974 regmap_write(regmap, ISC_WB_CFG, bay_cfg);
975 regmap_write(regmap, ISC_WB_O_RGR, 0x0);
976 regmap_write(regmap, ISC_WB_O_BGR, 0x0);
977 regmap_write(regmap, ISC_WB_G_RGR, ctrls->r_gain | (0x1 << 25));
978 regmap_write(regmap, ISC_WB_G_BGR, ctrls->b_gain | (0x1 << 25));
979
980 regmap_write(regmap, ISC_CFA_CFG, bay_cfg | ISC_CFA_CFG_EITPOL);
981
982 gamma = &isc_gamma_table[ctrls->gamma_index][0];
983 regmap_bulk_write(regmap, ISC_GAM_BENTRY, gamma, GAMMA_ENTRIES);
984 regmap_bulk_write(regmap, ISC_GAM_GENTRY, gamma, GAMMA_ENTRIES);
985 regmap_bulk_write(regmap, ISC_GAM_RENTRY, gamma, GAMMA_ENTRIES);
986
987 /* Convert RGB to YUV */
988 regmap_write(regmap, ISC_CSC_YR_YG, 0x42 | (0x81 << 16));
989 regmap_write(regmap, ISC_CSC_YB_OY, 0x19 | (0x10 << 16));
990 regmap_write(regmap, ISC_CSC_CBR_CBG, 0xFDA | (0xFB6 << 16));
991 regmap_write(regmap, ISC_CSC_CBB_OCB, 0x70 | (0x80 << 16));
992 regmap_write(regmap, ISC_CSC_CRR_CRG, 0x70 | (0xFA2 << 16));
993 regmap_write(regmap, ISC_CSC_CRB_OCR, 0xFEE | (0x80 << 16));
994
995 regmap_write(regmap, ISC_CBC_BRIGHT, ctrls->brightness);
996 regmap_write(regmap, ISC_CBC_CONTRAST, ctrls->contrast);
997 }
998
999 static int isc_update_profile(struct isc_device *isc)
1000 {
1001 struct regmap *regmap = isc->regmap;
1002 u32 sr;
1003 int counter = 100;
1004
1005 regmap_write(regmap, ISC_CTRLEN, ISC_CTRL_UPPRO);
1006
1007 regmap_read(regmap, ISC_CTRLSR, &sr);
1008 while ((sr & ISC_CTRL_UPPRO) && counter--) {
1009 usleep_range(1000, 2000);
1010 regmap_read(regmap, ISC_CTRLSR, &sr);
1011 }
1012
1013 if (counter < 0) {
1014 v4l2_warn(&isc->v4l2_dev, "Time out to update profie\n");
1015 return -ETIMEDOUT;
1016 }
1017
1018 return 0;
1019 }
1020
1021 static void isc_set_histogram(struct isc_device *isc)
1022 {
1023 struct regmap *regmap = isc->regmap;
1024 struct isc_ctrls *ctrls = &isc->ctrls;
1025 struct fmt_config *config = get_fmt_config(isc->raw_fmt->fourcc);
1026
1027 if (ctrls->awb && (ctrls->hist_stat != HIST_ENABLED)) {
1028 regmap_write(regmap, ISC_HIS_CFG,
1029 ISC_HIS_CFG_MODE_R |
1030 (config->cfa_baycfg << ISC_HIS_CFG_BAYSEL_SHIFT) |
1031 ISC_HIS_CFG_RAR);
1032 regmap_write(regmap, ISC_HIS_CTRL, ISC_HIS_CTRL_EN);
1033 regmap_write(regmap, ISC_INTEN, ISC_INT_HISDONE);
1034 ctrls->hist_id = ISC_HIS_CFG_MODE_R;
1035 isc_update_profile(isc);
1036 regmap_write(regmap, ISC_CTRLEN, ISC_CTRL_HISREQ);
1037
1038 ctrls->hist_stat = HIST_ENABLED;
1039 } else if (!ctrls->awb && (ctrls->hist_stat != HIST_DISABLED)) {
1040 regmap_write(regmap, ISC_INTDIS, ISC_INT_HISDONE);
1041 regmap_write(regmap, ISC_HIS_CTRL, ISC_HIS_CTRL_DIS);
1042
1043 ctrls->hist_stat = HIST_DISABLED;
1044 }
1045 }
1046
1047 static inline void isc_get_param(const struct isc_format *fmt,
1048 u32 *rlp_mode, u32 *dcfg)
1049 {
1050 struct fmt_config *config = get_fmt_config(fmt->fourcc);
1051
1052 *dcfg = ISC_DCFG_YMBSIZE_BEATS8;
1053
1054 switch (fmt->fourcc) {
1055 case V4L2_PIX_FMT_SBGGR10:
1056 case V4L2_PIX_FMT_SGBRG10:
1057 case V4L2_PIX_FMT_SGRBG10:
1058 case V4L2_PIX_FMT_SRGGB10:
1059 case V4L2_PIX_FMT_SBGGR12:
1060 case V4L2_PIX_FMT_SGBRG12:
1061 case V4L2_PIX_FMT_SGRBG12:
1062 case V4L2_PIX_FMT_SRGGB12:
1063 *rlp_mode = config->rlp_cfg_mode;
1064 *dcfg |= config->dcfg_imode;
1065 break;
1066 default:
1067 *rlp_mode = ISC_RLP_CFG_MODE_DAT8;
1068 *dcfg |= ISC_DCFG_IMODE_PACKED8;
1069 break;
1070 }
1071 }
1072
1073 static int isc_configure(struct isc_device *isc)
1074 {
1075 struct regmap *regmap = isc->regmap;
1076 const struct isc_format *current_fmt = isc->current_fmt;
1077 struct fmt_config *curfmt_config = get_fmt_config(current_fmt->fourcc);
1078 struct fmt_config *rawfmt_config = get_fmt_config(isc->raw_fmt->fourcc);
1079 struct isc_subdev_entity *subdev = isc->current_subdev;
1080 u32 pfe_cfg0, rlp_mode, dcfg, mask, pipeline;
1081
1082 if (sensor_is_preferred(current_fmt)) {
1083 pfe_cfg0 = curfmt_config->pfe_cfg0_bps;
1084 pipeline = 0x0;
1085 isc_get_param(current_fmt, &rlp_mode, &dcfg);
1086 isc->ctrls.hist_stat = HIST_INIT;
1087 } else {
1088 pfe_cfg0 = rawfmt_config->pfe_cfg0_bps;
1089 pipeline = curfmt_config->bits_pipeline;
1090 rlp_mode = curfmt_config->rlp_cfg_mode;
1091 dcfg = curfmt_config->dcfg_imode |
1092 ISC_DCFG_YMBSIZE_BEATS8 | ISC_DCFG_CMBSIZE_BEATS8;
1093 }
1094
1095 pfe_cfg0 |= subdev->pfe_cfg0 | ISC_PFE_CFG0_MODE_PROGRESSIVE;
1096 mask = ISC_PFE_CFG0_BPS_MASK | ISC_PFE_CFG0_HPOL_LOW |
1097 ISC_PFE_CFG0_VPOL_LOW | ISC_PFE_CFG0_PPOL_LOW |
1098 ISC_PFE_CFG0_MODE_MASK;
1099
1100 regmap_update_bits(regmap, ISC_PFE_CFG0, mask, pfe_cfg0);
1101
1102 regmap_update_bits(regmap, ISC_RLP_CFG, ISC_RLP_CFG_MODE_MASK,
1103 rlp_mode);
1104
1105 regmap_write(regmap, ISC_DCFG, dcfg);
1106
1107 /* Set the pipeline */
1108 isc_set_pipeline(isc, pipeline);
1109
1110 if (pipeline)
1111 isc_set_histogram(isc);
1112
1113 /* Update profile */
1114 return isc_update_profile(isc);
1115 }
1116
1117 static int isc_start_streaming(struct vb2_queue *vq, unsigned int count)
1118 {
1119 struct isc_device *isc = vb2_get_drv_priv(vq);
1120 struct regmap *regmap = isc->regmap;
1121 struct isc_buffer *buf;
1122 unsigned long flags;
1123 int ret;
1124
1125 /* Enable stream on the sub device */
1126 ret = v4l2_subdev_call(isc->current_subdev->sd, video, s_stream, 1);
1127 if (ret && ret != -ENOIOCTLCMD) {
1128 v4l2_err(&isc->v4l2_dev, "stream on failed in subdev\n");
1129 goto err_start_stream;
1130 }
1131
1132 pm_runtime_get_sync(isc->dev);
1133
1134 ret = isc_configure(isc);
1135 if (unlikely(ret))
1136 goto err_configure;
1137
1138 /* Enable DMA interrupt */
1139 regmap_write(regmap, ISC_INTEN, ISC_INT_DDONE);
1140
1141 spin_lock_irqsave(&isc->dma_queue_lock, flags);
1142
1143 isc->sequence = 0;
1144 isc->stop = false;
1145 reinit_completion(&isc->comp);
1146
1147 isc->cur_frm = list_first_entry(&isc->dma_queue,
1148 struct isc_buffer, list);
1149 list_del(&isc->cur_frm->list);
1150
1151 isc_start_dma(isc);
1152
1153 spin_unlock_irqrestore(&isc->dma_queue_lock, flags);
1154
1155 return 0;
1156
1157 err_configure:
1158 pm_runtime_put_sync(isc->dev);
1159
1160 v4l2_subdev_call(isc->current_subdev->sd, video, s_stream, 0);
1161
1162 err_start_stream:
1163 spin_lock_irqsave(&isc->dma_queue_lock, flags);
1164 list_for_each_entry(buf, &isc->dma_queue, list)
1165 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_QUEUED);
1166 INIT_LIST_HEAD(&isc->dma_queue);
1167 spin_unlock_irqrestore(&isc->dma_queue_lock, flags);
1168
1169 return ret;
1170 }
1171
1172 static void isc_stop_streaming(struct vb2_queue *vq)
1173 {
1174 struct isc_device *isc = vb2_get_drv_priv(vq);
1175 unsigned long flags;
1176 struct isc_buffer *buf;
1177 int ret;
1178
1179 isc->stop = true;
1180
1181 /* Wait until the end of the current frame */
1182 if (isc->cur_frm && !wait_for_completion_timeout(&isc->comp, 5 * HZ))
1183 v4l2_err(&isc->v4l2_dev,
1184 "Timeout waiting for end of the capture\n");
1185
1186 /* Disable DMA interrupt */
1187 regmap_write(isc->regmap, ISC_INTDIS, ISC_INT_DDONE);
1188
1189 pm_runtime_put_sync(isc->dev);
1190
1191 /* Disable stream on the sub device */
1192 ret = v4l2_subdev_call(isc->current_subdev->sd, video, s_stream, 0);
1193 if (ret && ret != -ENOIOCTLCMD)
1194 v4l2_err(&isc->v4l2_dev, "stream off failed in subdev\n");
1195
1196 /* Release all active buffers */
1197 spin_lock_irqsave(&isc->dma_queue_lock, flags);
1198 if (unlikely(isc->cur_frm)) {
1199 vb2_buffer_done(&isc->cur_frm->vb.vb2_buf,
1200 VB2_BUF_STATE_ERROR);
1201 isc->cur_frm = NULL;
1202 }
1203 list_for_each_entry(buf, &isc->dma_queue, list)
1204 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
1205 INIT_LIST_HEAD(&isc->dma_queue);
1206 spin_unlock_irqrestore(&isc->dma_queue_lock, flags);
1207 }
1208
1209 static void isc_buffer_queue(struct vb2_buffer *vb)
1210 {
1211 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
1212 struct isc_buffer *buf = container_of(vbuf, struct isc_buffer, vb);
1213 struct isc_device *isc = vb2_get_drv_priv(vb->vb2_queue);
1214 unsigned long flags;
1215
1216 spin_lock_irqsave(&isc->dma_queue_lock, flags);
1217 if (!isc->cur_frm && list_empty(&isc->dma_queue) &&
1218 vb2_is_streaming(vb->vb2_queue)) {
1219 isc->cur_frm = buf;
1220 isc_start_dma(isc);
1221 } else
1222 list_add_tail(&buf->list, &isc->dma_queue);
1223 spin_unlock_irqrestore(&isc->dma_queue_lock, flags);
1224 }
1225
1226 static const struct vb2_ops isc_vb2_ops = {
1227 .queue_setup = isc_queue_setup,
1228 .wait_prepare = vb2_ops_wait_prepare,
1229 .wait_finish = vb2_ops_wait_finish,
1230 .buf_prepare = isc_buffer_prepare,
1231 .start_streaming = isc_start_streaming,
1232 .stop_streaming = isc_stop_streaming,
1233 .buf_queue = isc_buffer_queue,
1234 };
1235
1236 static int isc_querycap(struct file *file, void *priv,
1237 struct v4l2_capability *cap)
1238 {
1239 struct isc_device *isc = video_drvdata(file);
1240
1241 strcpy(cap->driver, ATMEL_ISC_NAME);
1242 strcpy(cap->card, "Atmel Image Sensor Controller");
1243 snprintf(cap->bus_info, sizeof(cap->bus_info),
1244 "platform:%s", isc->v4l2_dev.name);
1245
1246 return 0;
1247 }
1248
1249 static int isc_enum_fmt_vid_cap(struct file *file, void *priv,
1250 struct v4l2_fmtdesc *f)
1251 {
1252 struct isc_device *isc = video_drvdata(file);
1253 u32 index = f->index;
1254
1255 if (index >= isc->num_user_formats)
1256 return -EINVAL;
1257
1258 f->pixelformat = isc->user_formats[index]->fourcc;
1259
1260 return 0;
1261 }
1262
1263 static int isc_g_fmt_vid_cap(struct file *file, void *priv,
1264 struct v4l2_format *fmt)
1265 {
1266 struct isc_device *isc = video_drvdata(file);
1267
1268 *fmt = isc->fmt;
1269
1270 return 0;
1271 }
1272
1273 static struct isc_format *find_format_by_fourcc(struct isc_device *isc,
1274 unsigned int fourcc)
1275 {
1276 unsigned int num_formats = isc->num_user_formats;
1277 struct isc_format *fmt;
1278 unsigned int i;
1279
1280 for (i = 0; i < num_formats; i++) {
1281 fmt = isc->user_formats[i];
1282 if (fmt->fourcc == fourcc)
1283 return fmt;
1284 }
1285
1286 return NULL;
1287 }
1288
1289 static int isc_try_fmt(struct isc_device *isc, struct v4l2_format *f,
1290 struct isc_format **current_fmt, u32 *code)
1291 {
1292 struct isc_format *isc_fmt;
1293 struct v4l2_pix_format *pixfmt = &f->fmt.pix;
1294 struct v4l2_subdev_pad_config pad_cfg;
1295 struct v4l2_subdev_format format = {
1296 .which = V4L2_SUBDEV_FORMAT_TRY,
1297 };
1298 u32 mbus_code;
1299 int ret;
1300
1301 if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1302 return -EINVAL;
1303
1304 isc_fmt = find_format_by_fourcc(isc, pixfmt->pixelformat);
1305 if (!isc_fmt) {
1306 v4l2_warn(&isc->v4l2_dev, "Format 0x%x not found\n",
1307 pixfmt->pixelformat);
1308 isc_fmt = isc->user_formats[isc->num_user_formats - 1];
1309 pixfmt->pixelformat = isc_fmt->fourcc;
1310 }
1311
1312 /* Limit to Atmel ISC hardware capabilities */
1313 if (pixfmt->width > ISC_MAX_SUPPORT_WIDTH)
1314 pixfmt->width = ISC_MAX_SUPPORT_WIDTH;
1315 if (pixfmt->height > ISC_MAX_SUPPORT_HEIGHT)
1316 pixfmt->height = ISC_MAX_SUPPORT_HEIGHT;
1317
1318 if (sensor_is_preferred(isc_fmt))
1319 mbus_code = isc_fmt->mbus_code;
1320 else
1321 mbus_code = isc->raw_fmt->mbus_code;
1322
1323 v4l2_fill_mbus_format(&format.format, pixfmt, mbus_code);
1324 ret = v4l2_subdev_call(isc->current_subdev->sd, pad, set_fmt,
1325 &pad_cfg, &format);
1326 if (ret < 0)
1327 return ret;
1328
1329 v4l2_fill_pix_format(pixfmt, &format.format);
1330
1331 pixfmt->field = V4L2_FIELD_NONE;
1332 pixfmt->bytesperline = (pixfmt->width * isc_fmt->bpp) >> 3;
1333 pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
1334
1335 if (current_fmt)
1336 *current_fmt = isc_fmt;
1337
1338 if (code)
1339 *code = mbus_code;
1340
1341 return 0;
1342 }
1343
1344 static int isc_set_fmt(struct isc_device *isc, struct v4l2_format *f)
1345 {
1346 struct v4l2_subdev_format format = {
1347 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
1348 };
1349 struct isc_format *current_fmt;
1350 u32 mbus_code;
1351 int ret;
1352
1353 ret = isc_try_fmt(isc, f, &current_fmt, &mbus_code);
1354 if (ret)
1355 return ret;
1356
1357 v4l2_fill_mbus_format(&format.format, &f->fmt.pix, mbus_code);
1358 ret = v4l2_subdev_call(isc->current_subdev->sd, pad,
1359 set_fmt, NULL, &format);
1360 if (ret < 0)
1361 return ret;
1362
1363 isc->fmt = *f;
1364 isc->current_fmt = current_fmt;
1365
1366 return 0;
1367 }
1368
1369 static int isc_s_fmt_vid_cap(struct file *file, void *priv,
1370 struct v4l2_format *f)
1371 {
1372 struct isc_device *isc = video_drvdata(file);
1373
1374 if (vb2_is_streaming(&isc->vb2_vidq))
1375 return -EBUSY;
1376
1377 return isc_set_fmt(isc, f);
1378 }
1379
1380 static int isc_try_fmt_vid_cap(struct file *file, void *priv,
1381 struct v4l2_format *f)
1382 {
1383 struct isc_device *isc = video_drvdata(file);
1384
1385 return isc_try_fmt(isc, f, NULL, NULL);
1386 }
1387
1388 static int isc_enum_input(struct file *file, void *priv,
1389 struct v4l2_input *inp)
1390 {
1391 if (inp->index != 0)
1392 return -EINVAL;
1393
1394 inp->type = V4L2_INPUT_TYPE_CAMERA;
1395 inp->std = 0;
1396 strcpy(inp->name, "Camera");
1397
1398 return 0;
1399 }
1400
1401 static int isc_g_input(struct file *file, void *priv, unsigned int *i)
1402 {
1403 *i = 0;
1404
1405 return 0;
1406 }
1407
1408 static int isc_s_input(struct file *file, void *priv, unsigned int i)
1409 {
1410 if (i > 0)
1411 return -EINVAL;
1412
1413 return 0;
1414 }
1415
1416 static int isc_g_parm(struct file *file, void *fh, struct v4l2_streamparm *a)
1417 {
1418 struct isc_device *isc = video_drvdata(file);
1419
1420 return v4l2_g_parm_cap(video_devdata(file), isc->current_subdev->sd, a);
1421 }
1422
1423 static int isc_s_parm(struct file *file, void *fh, struct v4l2_streamparm *a)
1424 {
1425 struct isc_device *isc = video_drvdata(file);
1426
1427 return v4l2_s_parm_cap(video_devdata(file), isc->current_subdev->sd, a);
1428 }
1429
1430 static int isc_enum_framesizes(struct file *file, void *fh,
1431 struct v4l2_frmsizeenum *fsize)
1432 {
1433 struct isc_device *isc = video_drvdata(file);
1434 const struct isc_format *isc_fmt;
1435 struct v4l2_subdev_frame_size_enum fse = {
1436 .index = fsize->index,
1437 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
1438 };
1439 int ret;
1440
1441 isc_fmt = find_format_by_fourcc(isc, fsize->pixel_format);
1442 if (!isc_fmt)
1443 return -EINVAL;
1444
1445 if (sensor_is_preferred(isc_fmt))
1446 fse.code = isc_fmt->mbus_code;
1447 else
1448 fse.code = isc->raw_fmt->mbus_code;
1449
1450 ret = v4l2_subdev_call(isc->current_subdev->sd, pad, enum_frame_size,
1451 NULL, &fse);
1452 if (ret)
1453 return ret;
1454
1455 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1456 fsize->discrete.width = fse.max_width;
1457 fsize->discrete.height = fse.max_height;
1458
1459 return 0;
1460 }
1461
1462 static int isc_enum_frameintervals(struct file *file, void *fh,
1463 struct v4l2_frmivalenum *fival)
1464 {
1465 struct isc_device *isc = video_drvdata(file);
1466 const struct isc_format *isc_fmt;
1467 struct v4l2_subdev_frame_interval_enum fie = {
1468 .index = fival->index,
1469 .width = fival->width,
1470 .height = fival->height,
1471 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
1472 };
1473 int ret;
1474
1475 isc_fmt = find_format_by_fourcc(isc, fival->pixel_format);
1476 if (!isc_fmt)
1477 return -EINVAL;
1478
1479 if (sensor_is_preferred(isc_fmt))
1480 fie.code = isc_fmt->mbus_code;
1481 else
1482 fie.code = isc->raw_fmt->mbus_code;
1483
1484 ret = v4l2_subdev_call(isc->current_subdev->sd, pad,
1485 enum_frame_interval, NULL, &fie);
1486 if (ret)
1487 return ret;
1488
1489 fival->type = V4L2_FRMIVAL_TYPE_DISCRETE;
1490 fival->discrete = fie.interval;
1491
1492 return 0;
1493 }
1494
1495 static const struct v4l2_ioctl_ops isc_ioctl_ops = {
1496 .vidioc_querycap = isc_querycap,
1497 .vidioc_enum_fmt_vid_cap = isc_enum_fmt_vid_cap,
1498 .vidioc_g_fmt_vid_cap = isc_g_fmt_vid_cap,
1499 .vidioc_s_fmt_vid_cap = isc_s_fmt_vid_cap,
1500 .vidioc_try_fmt_vid_cap = isc_try_fmt_vid_cap,
1501
1502 .vidioc_enum_input = isc_enum_input,
1503 .vidioc_g_input = isc_g_input,
1504 .vidioc_s_input = isc_s_input,
1505
1506 .vidioc_reqbufs = vb2_ioctl_reqbufs,
1507 .vidioc_querybuf = vb2_ioctl_querybuf,
1508 .vidioc_qbuf = vb2_ioctl_qbuf,
1509 .vidioc_expbuf = vb2_ioctl_expbuf,
1510 .vidioc_dqbuf = vb2_ioctl_dqbuf,
1511 .vidioc_create_bufs = vb2_ioctl_create_bufs,
1512 .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
1513 .vidioc_streamon = vb2_ioctl_streamon,
1514 .vidioc_streamoff = vb2_ioctl_streamoff,
1515
1516 .vidioc_g_parm = isc_g_parm,
1517 .vidioc_s_parm = isc_s_parm,
1518 .vidioc_enum_framesizes = isc_enum_framesizes,
1519 .vidioc_enum_frameintervals = isc_enum_frameintervals,
1520
1521 .vidioc_log_status = v4l2_ctrl_log_status,
1522 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1523 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1524 };
1525
1526 static int isc_open(struct file *file)
1527 {
1528 struct isc_device *isc = video_drvdata(file);
1529 struct v4l2_subdev *sd = isc->current_subdev->sd;
1530 int ret;
1531
1532 if (mutex_lock_interruptible(&isc->lock))
1533 return -ERESTARTSYS;
1534
1535 ret = v4l2_fh_open(file);
1536 if (ret < 0)
1537 goto unlock;
1538
1539 if (!v4l2_fh_is_singular_file(file))
1540 goto unlock;
1541
1542 ret = v4l2_subdev_call(sd, core, s_power, 1);
1543 if (ret < 0 && ret != -ENOIOCTLCMD) {
1544 v4l2_fh_release(file);
1545 goto unlock;
1546 }
1547
1548 ret = isc_set_fmt(isc, &isc->fmt);
1549 if (ret) {
1550 v4l2_subdev_call(sd, core, s_power, 0);
1551 v4l2_fh_release(file);
1552 }
1553
1554 unlock:
1555 mutex_unlock(&isc->lock);
1556 return ret;
1557 }
1558
1559 static int isc_release(struct file *file)
1560 {
1561 struct isc_device *isc = video_drvdata(file);
1562 struct v4l2_subdev *sd = isc->current_subdev->sd;
1563 bool fh_singular;
1564 int ret;
1565
1566 mutex_lock(&isc->lock);
1567
1568 fh_singular = v4l2_fh_is_singular_file(file);
1569
1570 ret = _vb2_fop_release(file, NULL);
1571
1572 if (fh_singular)
1573 v4l2_subdev_call(sd, core, s_power, 0);
1574
1575 mutex_unlock(&isc->lock);
1576
1577 return ret;
1578 }
1579
1580 static const struct v4l2_file_operations isc_fops = {
1581 .owner = THIS_MODULE,
1582 .open = isc_open,
1583 .release = isc_release,
1584 .unlocked_ioctl = video_ioctl2,
1585 .read = vb2_fop_read,
1586 .mmap = vb2_fop_mmap,
1587 .poll = vb2_fop_poll,
1588 };
1589
1590 static irqreturn_t isc_interrupt(int irq, void *dev_id)
1591 {
1592 struct isc_device *isc = (struct isc_device *)dev_id;
1593 struct regmap *regmap = isc->regmap;
1594 u32 isc_intsr, isc_intmask, pending;
1595 irqreturn_t ret = IRQ_NONE;
1596
1597 regmap_read(regmap, ISC_INTSR, &isc_intsr);
1598 regmap_read(regmap, ISC_INTMASK, &isc_intmask);
1599
1600 pending = isc_intsr & isc_intmask;
1601
1602 if (likely(pending & ISC_INT_DDONE)) {
1603 spin_lock(&isc->dma_queue_lock);
1604 if (isc->cur_frm) {
1605 struct vb2_v4l2_buffer *vbuf = &isc->cur_frm->vb;
1606 struct vb2_buffer *vb = &vbuf->vb2_buf;
1607
1608 vb->timestamp = ktime_get_ns();
1609 vbuf->sequence = isc->sequence++;
1610 vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
1611 isc->cur_frm = NULL;
1612 }
1613
1614 if (!list_empty(&isc->dma_queue) && !isc->stop) {
1615 isc->cur_frm = list_first_entry(&isc->dma_queue,
1616 struct isc_buffer, list);
1617 list_del(&isc->cur_frm->list);
1618
1619 isc_start_dma(isc);
1620 }
1621
1622 if (isc->stop)
1623 complete(&isc->comp);
1624
1625 ret = IRQ_HANDLED;
1626 spin_unlock(&isc->dma_queue_lock);
1627 }
1628
1629 if (pending & ISC_INT_HISDONE) {
1630 schedule_work(&isc->awb_work);
1631 ret = IRQ_HANDLED;
1632 }
1633
1634 return ret;
1635 }
1636
1637 static void isc_hist_count(struct isc_device *isc)
1638 {
1639 struct regmap *regmap = isc->regmap;
1640 struct isc_ctrls *ctrls = &isc->ctrls;
1641 u32 *hist_count = &ctrls->hist_count[ctrls->hist_id];
1642 u32 *hist_entry = &ctrls->hist_entry[0];
1643 u32 i;
1644
1645 regmap_bulk_read(regmap, ISC_HIS_ENTRY, hist_entry, HIST_ENTRIES);
1646
1647 *hist_count = 0;
1648 for (i = 0; i < HIST_ENTRIES; i++)
1649 *hist_count += i * (*hist_entry++);
1650 }
1651
1652 static void isc_wb_update(struct isc_ctrls *ctrls)
1653 {
1654 u32 *hist_count = &ctrls->hist_count[0];
1655 u64 g_count = (u64)hist_count[ISC_HIS_CFG_MODE_GB] << 9;
1656 u32 hist_r = hist_count[ISC_HIS_CFG_MODE_R];
1657 u32 hist_b = hist_count[ISC_HIS_CFG_MODE_B];
1658
1659 if (hist_r)
1660 ctrls->r_gain = div_u64(g_count, hist_r);
1661
1662 if (hist_b)
1663 ctrls->b_gain = div_u64(g_count, hist_b);
1664 }
1665
1666 static void isc_awb_work(struct work_struct *w)
1667 {
1668 struct isc_device *isc =
1669 container_of(w, struct isc_device, awb_work);
1670 struct regmap *regmap = isc->regmap;
1671 struct fmt_config *config = get_fmt_config(isc->raw_fmt->fourcc);
1672 struct isc_ctrls *ctrls = &isc->ctrls;
1673 u32 hist_id = ctrls->hist_id;
1674 u32 baysel;
1675
1676 if (ctrls->hist_stat != HIST_ENABLED)
1677 return;
1678
1679 isc_hist_count(isc);
1680
1681 if (hist_id != ISC_HIS_CFG_MODE_B) {
1682 hist_id++;
1683 } else {
1684 isc_wb_update(ctrls);
1685 hist_id = ISC_HIS_CFG_MODE_R;
1686 }
1687
1688 ctrls->hist_id = hist_id;
1689 baysel = config->cfa_baycfg << ISC_HIS_CFG_BAYSEL_SHIFT;
1690
1691 pm_runtime_get_sync(isc->dev);
1692
1693 regmap_write(regmap, ISC_HIS_CFG, hist_id | baysel | ISC_HIS_CFG_RAR);
1694 isc_update_profile(isc);
1695 regmap_write(regmap, ISC_CTRLEN, ISC_CTRL_HISREQ);
1696
1697 pm_runtime_put_sync(isc->dev);
1698 }
1699
1700 static int isc_s_ctrl(struct v4l2_ctrl *ctrl)
1701 {
1702 struct isc_device *isc = container_of(ctrl->handler,
1703 struct isc_device, ctrls.handler);
1704 struct isc_ctrls *ctrls = &isc->ctrls;
1705
1706 switch (ctrl->id) {
1707 case V4L2_CID_BRIGHTNESS:
1708 ctrls->brightness = ctrl->val & ISC_CBC_BRIGHT_MASK;
1709 break;
1710 case V4L2_CID_CONTRAST:
1711 ctrls->contrast = ctrl->val & ISC_CBC_CONTRAST_MASK;
1712 break;
1713 case V4L2_CID_GAMMA:
1714 ctrls->gamma_index = ctrl->val;
1715 break;
1716 case V4L2_CID_AUTO_WHITE_BALANCE:
1717 ctrls->awb = ctrl->val;
1718 if (ctrls->hist_stat != HIST_ENABLED) {
1719 ctrls->r_gain = 0x1 << 9;
1720 ctrls->b_gain = 0x1 << 9;
1721 }
1722 break;
1723 default:
1724 return -EINVAL;
1725 }
1726
1727 return 0;
1728 }
1729
1730 static const struct v4l2_ctrl_ops isc_ctrl_ops = {
1731 .s_ctrl = isc_s_ctrl,
1732 };
1733
1734 static int isc_ctrl_init(struct isc_device *isc)
1735 {
1736 const struct v4l2_ctrl_ops *ops = &isc_ctrl_ops;
1737 struct isc_ctrls *ctrls = &isc->ctrls;
1738 struct v4l2_ctrl_handler *hdl = &ctrls->handler;
1739 int ret;
1740
1741 ctrls->hist_stat = HIST_INIT;
1742
1743 ret = v4l2_ctrl_handler_init(hdl, 4);
1744 if (ret < 0)
1745 return ret;
1746
1747 v4l2_ctrl_new_std(hdl, ops, V4L2_CID_BRIGHTNESS, -1024, 1023, 1, 0);
1748 v4l2_ctrl_new_std(hdl, ops, V4L2_CID_CONTRAST, -2048, 2047, 1, 256);
1749 v4l2_ctrl_new_std(hdl, ops, V4L2_CID_GAMMA, 0, GAMMA_MAX, 1, 2);
1750 v4l2_ctrl_new_std(hdl, ops, V4L2_CID_AUTO_WHITE_BALANCE, 0, 1, 1, 1);
1751
1752 v4l2_ctrl_handler_setup(hdl);
1753
1754 return 0;
1755 }
1756
1757
1758 static int isc_async_bound(struct v4l2_async_notifier *notifier,
1759 struct v4l2_subdev *subdev,
1760 struct v4l2_async_subdev *asd)
1761 {
1762 struct isc_device *isc = container_of(notifier->v4l2_dev,
1763 struct isc_device, v4l2_dev);
1764 struct isc_subdev_entity *subdev_entity =
1765 container_of(notifier, struct isc_subdev_entity, notifier);
1766
1767 if (video_is_registered(&isc->video_dev)) {
1768 v4l2_err(&isc->v4l2_dev, "only supports one sub-device.\n");
1769 return -EBUSY;
1770 }
1771
1772 subdev_entity->sd = subdev;
1773
1774 return 0;
1775 }
1776
1777 static void isc_async_unbind(struct v4l2_async_notifier *notifier,
1778 struct v4l2_subdev *subdev,
1779 struct v4l2_async_subdev *asd)
1780 {
1781 struct isc_device *isc = container_of(notifier->v4l2_dev,
1782 struct isc_device, v4l2_dev);
1783 cancel_work_sync(&isc->awb_work);
1784 video_unregister_device(&isc->video_dev);
1785 v4l2_ctrl_handler_free(&isc->ctrls.handler);
1786 }
1787
1788 static struct isc_format *find_format_by_code(unsigned int code, int *index)
1789 {
1790 struct isc_format *fmt = &formats_list[0];
1791 unsigned int i;
1792
1793 for (i = 0; i < ARRAY_SIZE(formats_list); i++) {
1794 if (fmt->mbus_code == code) {
1795 *index = i;
1796 return fmt;
1797 }
1798
1799 fmt++;
1800 }
1801
1802 return NULL;
1803 }
1804
1805 static int isc_formats_init(struct isc_device *isc)
1806 {
1807 struct isc_format *fmt;
1808 struct v4l2_subdev *subdev = isc->current_subdev->sd;
1809 unsigned int num_fmts, i, j;
1810 u32 list_size = ARRAY_SIZE(formats_list);
1811 struct v4l2_subdev_mbus_code_enum mbus_code = {
1812 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
1813 };
1814
1815 while (!v4l2_subdev_call(subdev, pad, enum_mbus_code,
1816 NULL, &mbus_code)) {
1817 mbus_code.index++;
1818
1819 fmt = find_format_by_code(mbus_code.code, &i);
1820 if ((!fmt) || (!(fmt->flags & FMT_FLAG_FROM_SENSOR)))
1821 continue;
1822
1823 fmt->sd_support = true;
1824
1825 if (fmt->flags & FMT_FLAG_RAW_FORMAT)
1826 isc->raw_fmt = fmt;
1827 }
1828
1829 fmt = &formats_list[0];
1830 for (i = 0; i < list_size; i++) {
1831 if (fmt->flags & FMT_FLAG_FROM_CONTROLLER)
1832 fmt->isc_support = true;
1833
1834 fmt++;
1835 }
1836
1837 fmt = &formats_list[0];
1838 num_fmts = 0;
1839 for (i = 0; i < list_size; i++) {
1840 if (fmt->isc_support || fmt->sd_support)
1841 num_fmts++;
1842
1843 fmt++;
1844 }
1845
1846 if (!num_fmts)
1847 return -ENXIO;
1848
1849 isc->num_user_formats = num_fmts;
1850 isc->user_formats = devm_kcalloc(isc->dev,
1851 num_fmts, sizeof(*isc->user_formats),
1852 GFP_KERNEL);
1853 if (!isc->user_formats)
1854 return -ENOMEM;
1855
1856 fmt = &formats_list[0];
1857 for (i = 0, j = 0; i < list_size; i++) {
1858 if (fmt->isc_support || fmt->sd_support)
1859 isc->user_formats[j++] = fmt;
1860
1861 fmt++;
1862 }
1863
1864 return 0;
1865 }
1866
1867 static int isc_set_default_fmt(struct isc_device *isc)
1868 {
1869 struct v4l2_format f = {
1870 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
1871 .fmt.pix = {
1872 .width = VGA_WIDTH,
1873 .height = VGA_HEIGHT,
1874 .field = V4L2_FIELD_NONE,
1875 .pixelformat = isc->user_formats[0]->fourcc,
1876 },
1877 };
1878 int ret;
1879
1880 ret = isc_try_fmt(isc, &f, NULL, NULL);
1881 if (ret)
1882 return ret;
1883
1884 isc->current_fmt = isc->user_formats[0];
1885 isc->fmt = f;
1886
1887 return 0;
1888 }
1889
1890 static int isc_async_complete(struct v4l2_async_notifier *notifier)
1891 {
1892 struct isc_device *isc = container_of(notifier->v4l2_dev,
1893 struct isc_device, v4l2_dev);
1894 struct video_device *vdev = &isc->video_dev;
1895 struct vb2_queue *q = &isc->vb2_vidq;
1896 int ret;
1897
1898 ret = v4l2_device_register_subdev_nodes(&isc->v4l2_dev);
1899 if (ret < 0) {
1900 v4l2_err(&isc->v4l2_dev, "Failed to register subdev nodes\n");
1901 return ret;
1902 }
1903
1904 isc->current_subdev = container_of(notifier,
1905 struct isc_subdev_entity, notifier);
1906 mutex_init(&isc->lock);
1907 init_completion(&isc->comp);
1908
1909 /* Initialize videobuf2 queue */
1910 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1911 q->io_modes = VB2_MMAP | VB2_DMABUF | VB2_READ;
1912 q->drv_priv = isc;
1913 q->buf_struct_size = sizeof(struct isc_buffer);
1914 q->ops = &isc_vb2_ops;
1915 q->mem_ops = &vb2_dma_contig_memops;
1916 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1917 q->lock = &isc->lock;
1918 q->min_buffers_needed = 1;
1919 q->dev = isc->dev;
1920
1921 ret = vb2_queue_init(q);
1922 if (ret < 0) {
1923 v4l2_err(&isc->v4l2_dev,
1924 "vb2_queue_init() failed: %d\n", ret);
1925 return ret;
1926 }
1927
1928 /* Init video dma queues */
1929 INIT_LIST_HEAD(&isc->dma_queue);
1930 spin_lock_init(&isc->dma_queue_lock);
1931
1932 ret = isc_formats_init(isc);
1933 if (ret < 0) {
1934 v4l2_err(&isc->v4l2_dev,
1935 "Init format failed: %d\n", ret);
1936 return ret;
1937 }
1938
1939 ret = isc_set_default_fmt(isc);
1940 if (ret) {
1941 v4l2_err(&isc->v4l2_dev, "Could not set default format\n");
1942 return ret;
1943 }
1944
1945 ret = isc_ctrl_init(isc);
1946 if (ret) {
1947 v4l2_err(&isc->v4l2_dev, "Init isc ctrols failed: %d\n", ret);
1948 return ret;
1949 }
1950
1951 INIT_WORK(&isc->awb_work, isc_awb_work);
1952
1953 /* Register video device */
1954 strlcpy(vdev->name, ATMEL_ISC_NAME, sizeof(vdev->name));
1955 vdev->release = video_device_release_empty;
1956 vdev->fops = &isc_fops;
1957 vdev->ioctl_ops = &isc_ioctl_ops;
1958 vdev->v4l2_dev = &isc->v4l2_dev;
1959 vdev->vfl_dir = VFL_DIR_RX;
1960 vdev->queue = q;
1961 vdev->lock = &isc->lock;
1962 vdev->ctrl_handler = &isc->ctrls.handler;
1963 vdev->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_CAPTURE;
1964 video_set_drvdata(vdev, isc);
1965
1966 ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
1967 if (ret < 0) {
1968 v4l2_err(&isc->v4l2_dev,
1969 "video_register_device failed: %d\n", ret);
1970 return ret;
1971 }
1972
1973 return 0;
1974 }
1975
1976 static const struct v4l2_async_notifier_operations isc_async_ops = {
1977 .bound = isc_async_bound,
1978 .unbind = isc_async_unbind,
1979 .complete = isc_async_complete,
1980 };
1981
1982 static void isc_subdev_cleanup(struct isc_device *isc)
1983 {
1984 struct isc_subdev_entity *subdev_entity;
1985
1986 list_for_each_entry(subdev_entity, &isc->subdev_entities, list)
1987 v4l2_async_notifier_unregister(&subdev_entity->notifier);
1988
1989 INIT_LIST_HEAD(&isc->subdev_entities);
1990 }
1991
1992 static int isc_pipeline_init(struct isc_device *isc)
1993 {
1994 struct device *dev = isc->dev;
1995 struct regmap *regmap = isc->regmap;
1996 struct regmap_field *regs;
1997 unsigned int i;
1998
1999 /* WB-->CFA-->CC-->GAM-->CSC-->CBC-->SUB422-->SUB420 */
2000 const struct reg_field regfields[ISC_PIPE_LINE_NODE_NUM] = {
2001 REG_FIELD(ISC_WB_CTRL, 0, 0),
2002 REG_FIELD(ISC_CFA_CTRL, 0, 0),
2003 REG_FIELD(ISC_CC_CTRL, 0, 0),
2004 REG_FIELD(ISC_GAM_CTRL, 0, 0),
2005 REG_FIELD(ISC_GAM_CTRL, 1, 1),
2006 REG_FIELD(ISC_GAM_CTRL, 2, 2),
2007 REG_FIELD(ISC_GAM_CTRL, 3, 3),
2008 REG_FIELD(ISC_CSC_CTRL, 0, 0),
2009 REG_FIELD(ISC_CBC_CTRL, 0, 0),
2010 REG_FIELD(ISC_SUB422_CTRL, 0, 0),
2011 REG_FIELD(ISC_SUB420_CTRL, 0, 0),
2012 };
2013
2014 for (i = 0; i < ISC_PIPE_LINE_NODE_NUM; i++) {
2015 regs = devm_regmap_field_alloc(dev, regmap, regfields[i]);
2016 if (IS_ERR(regs))
2017 return PTR_ERR(regs);
2018
2019 isc->pipeline[i] = regs;
2020 }
2021
2022 return 0;
2023 }
2024
2025 static int isc_parse_dt(struct device *dev, struct isc_device *isc)
2026 {
2027 struct device_node *np = dev->of_node;
2028 struct device_node *epn = NULL, *rem;
2029 struct v4l2_fwnode_endpoint v4l2_epn;
2030 struct isc_subdev_entity *subdev_entity;
2031 unsigned int flags;
2032 int ret;
2033
2034 INIT_LIST_HEAD(&isc->subdev_entities);
2035
2036 while (1) {
2037 epn = of_graph_get_next_endpoint(np, epn);
2038 if (!epn)
2039 return 0;
2040
2041 rem = of_graph_get_remote_port_parent(epn);
2042 if (!rem) {
2043 dev_notice(dev, "Remote device at %pOF not found\n",
2044 epn);
2045 continue;
2046 }
2047
2048 ret = v4l2_fwnode_endpoint_parse(of_fwnode_handle(epn),
2049 &v4l2_epn);
2050 if (ret) {
2051 of_node_put(rem);
2052 ret = -EINVAL;
2053 dev_err(dev, "Could not parse the endpoint\n");
2054 break;
2055 }
2056
2057 subdev_entity = devm_kzalloc(dev,
2058 sizeof(*subdev_entity), GFP_KERNEL);
2059 if (!subdev_entity) {
2060 of_node_put(rem);
2061 ret = -ENOMEM;
2062 break;
2063 }
2064
2065 subdev_entity->asd = devm_kzalloc(dev,
2066 sizeof(*subdev_entity->asd), GFP_KERNEL);
2067 if (!subdev_entity->asd) {
2068 of_node_put(rem);
2069 ret = -ENOMEM;
2070 break;
2071 }
2072
2073 flags = v4l2_epn.bus.parallel.flags;
2074
2075 if (flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)
2076 subdev_entity->pfe_cfg0 = ISC_PFE_CFG0_HPOL_LOW;
2077
2078 if (flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)
2079 subdev_entity->pfe_cfg0 |= ISC_PFE_CFG0_VPOL_LOW;
2080
2081 if (flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)
2082 subdev_entity->pfe_cfg0 |= ISC_PFE_CFG0_PPOL_LOW;
2083
2084 subdev_entity->asd->match_type = V4L2_ASYNC_MATCH_FWNODE;
2085 subdev_entity->asd->match.fwnode =
2086 of_fwnode_handle(rem);
2087 list_add_tail(&subdev_entity->list, &isc->subdev_entities);
2088 }
2089
2090 of_node_put(epn);
2091 return ret;
2092 }
2093
2094 /* regmap configuration */
2095 #define ATMEL_ISC_REG_MAX 0xbfc
2096 static const struct regmap_config isc_regmap_config = {
2097 .reg_bits = 32,
2098 .reg_stride = 4,
2099 .val_bits = 32,
2100 .max_register = ATMEL_ISC_REG_MAX,
2101 };
2102
2103 static int atmel_isc_probe(struct platform_device *pdev)
2104 {
2105 struct device *dev = &pdev->dev;
2106 struct isc_device *isc;
2107 struct resource *res;
2108 void __iomem *io_base;
2109 struct isc_subdev_entity *subdev_entity;
2110 int irq;
2111 int ret;
2112
2113 isc = devm_kzalloc(dev, sizeof(*isc), GFP_KERNEL);
2114 if (!isc)
2115 return -ENOMEM;
2116
2117 platform_set_drvdata(pdev, isc);
2118 isc->dev = dev;
2119
2120 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2121 io_base = devm_ioremap_resource(dev, res);
2122 if (IS_ERR(io_base))
2123 return PTR_ERR(io_base);
2124
2125 isc->regmap = devm_regmap_init_mmio(dev, io_base, &isc_regmap_config);
2126 if (IS_ERR(isc->regmap)) {
2127 ret = PTR_ERR(isc->regmap);
2128 dev_err(dev, "failed to init register map: %d\n", ret);
2129 return ret;
2130 }
2131
2132 irq = platform_get_irq(pdev, 0);
2133 if (irq < 0) {
2134 ret = irq;
2135 dev_err(dev, "failed to get irq: %d\n", ret);
2136 return ret;
2137 }
2138
2139 ret = devm_request_irq(dev, irq, isc_interrupt, 0,
2140 ATMEL_ISC_NAME, isc);
2141 if (ret < 0) {
2142 dev_err(dev, "can't register ISR for IRQ %u (ret=%i)\n",
2143 irq, ret);
2144 return ret;
2145 }
2146
2147 ret = isc_pipeline_init(isc);
2148 if (ret)
2149 return ret;
2150
2151 isc->hclock = devm_clk_get(dev, "hclock");
2152 if (IS_ERR(isc->hclock)) {
2153 ret = PTR_ERR(isc->hclock);
2154 dev_err(dev, "failed to get hclock: %d\n", ret);
2155 return ret;
2156 }
2157
2158 ret = clk_prepare_enable(isc->hclock);
2159 if (ret) {
2160 dev_err(dev, "failed to enable hclock: %d\n", ret);
2161 return ret;
2162 }
2163
2164 ret = isc_clk_init(isc);
2165 if (ret) {
2166 dev_err(dev, "failed to init isc clock: %d\n", ret);
2167 goto unprepare_hclk;
2168 }
2169
2170 isc->ispck = isc->isc_clks[ISC_ISPCK].clk;
2171
2172 ret = clk_prepare_enable(isc->ispck);
2173 if (ret) {
2174 dev_err(dev, "failed to enable ispck: %d\n", ret);
2175 goto unprepare_hclk;
2176 }
2177
2178 /* ispck should be greater or equal to hclock */
2179 ret = clk_set_rate(isc->ispck, clk_get_rate(isc->hclock));
2180 if (ret) {
2181 dev_err(dev, "failed to set ispck rate: %d\n", ret);
2182 goto unprepare_clk;
2183 }
2184
2185 ret = v4l2_device_register(dev, &isc->v4l2_dev);
2186 if (ret) {
2187 dev_err(dev, "unable to register v4l2 device.\n");
2188 goto unprepare_clk;
2189 }
2190
2191 ret = isc_parse_dt(dev, isc);
2192 if (ret) {
2193 dev_err(dev, "fail to parse device tree\n");
2194 goto unregister_v4l2_device;
2195 }
2196
2197 if (list_empty(&isc->subdev_entities)) {
2198 dev_err(dev, "no subdev found\n");
2199 ret = -ENODEV;
2200 goto unregister_v4l2_device;
2201 }
2202
2203 list_for_each_entry(subdev_entity, &isc->subdev_entities, list) {
2204 subdev_entity->notifier.subdevs = &subdev_entity->asd;
2205 subdev_entity->notifier.num_subdevs = 1;
2206 subdev_entity->notifier.ops = &isc_async_ops;
2207
2208 ret = v4l2_async_notifier_register(&isc->v4l2_dev,
2209 &subdev_entity->notifier);
2210 if (ret) {
2211 dev_err(dev, "fail to register async notifier\n");
2212 goto cleanup_subdev;
2213 }
2214
2215 if (video_is_registered(&isc->video_dev))
2216 break;
2217 }
2218
2219 pm_runtime_set_active(dev);
2220 pm_runtime_enable(dev);
2221 pm_request_idle(dev);
2222
2223 return 0;
2224
2225 cleanup_subdev:
2226 isc_subdev_cleanup(isc);
2227
2228 unregister_v4l2_device:
2229 v4l2_device_unregister(&isc->v4l2_dev);
2230
2231 unprepare_clk:
2232 clk_disable_unprepare(isc->ispck);
2233 unprepare_hclk:
2234 clk_disable_unprepare(isc->hclock);
2235
2236 isc_clk_cleanup(isc);
2237
2238 return ret;
2239 }
2240
2241 static int atmel_isc_remove(struct platform_device *pdev)
2242 {
2243 struct isc_device *isc = platform_get_drvdata(pdev);
2244
2245 pm_runtime_disable(&pdev->dev);
2246 clk_disable_unprepare(isc->ispck);
2247 clk_disable_unprepare(isc->hclock);
2248
2249 isc_subdev_cleanup(isc);
2250
2251 v4l2_device_unregister(&isc->v4l2_dev);
2252
2253 isc_clk_cleanup(isc);
2254
2255 return 0;
2256 }
2257
2258 static int __maybe_unused isc_runtime_suspend(struct device *dev)
2259 {
2260 struct isc_device *isc = dev_get_drvdata(dev);
2261
2262 clk_disable_unprepare(isc->ispck);
2263 clk_disable_unprepare(isc->hclock);
2264
2265 return 0;
2266 }
2267
2268 static int __maybe_unused isc_runtime_resume(struct device *dev)
2269 {
2270 struct isc_device *isc = dev_get_drvdata(dev);
2271 int ret;
2272
2273 ret = clk_prepare_enable(isc->hclock);
2274 if (ret)
2275 return ret;
2276
2277 return clk_prepare_enable(isc->ispck);
2278 }
2279
2280 static const struct dev_pm_ops atmel_isc_dev_pm_ops = {
2281 SET_RUNTIME_PM_OPS(isc_runtime_suspend, isc_runtime_resume, NULL)
2282 };
2283
2284 static const struct of_device_id atmel_isc_of_match[] = {
2285 { .compatible = "atmel,sama5d2-isc" },
2286 { }
2287 };
2288 MODULE_DEVICE_TABLE(of, atmel_isc_of_match);
2289
2290 static struct platform_driver atmel_isc_driver = {
2291 .probe = atmel_isc_probe,
2292 .remove = atmel_isc_remove,
2293 .driver = {
2294 .name = ATMEL_ISC_NAME,
2295 .pm = &atmel_isc_dev_pm_ops,
2296 .of_match_table = of_match_ptr(atmel_isc_of_match),
2297 },
2298 };
2299
2300 module_platform_driver(atmel_isc_driver);
2301
2302 MODULE_AUTHOR("Songjun Wu <songjun.wu@microchip.com>");
2303 MODULE_DESCRIPTION("The V4L2 driver for Atmel-ISC");
2304 MODULE_LICENSE("GPL v2");
2305 MODULE_SUPPORTED_DEVICE("video");
Linux with added FPC-III support