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8#include <linux/clk.h>
9#include <linux/delay.h>
10#include <linux/dma-mapping.h>
11#include <linux/err.h>
12#include <linux/fs.h>
13#include <linux/interrupt.h>
14#include <linux/io.h>
15#include <linux/ioctl.h>
16#include <linux/module.h>
17#include <linux/of.h>
18#include <linux/of_device.h>
19#include <linux/platform_device.h>
20#include <linux/pm_runtime.h>
21#include <linux/regmap.h>
22#include <linux/reset.h>
23#include <linux/sched.h>
24#include <linux/sizes.h>
25#include <linux/slab.h>
26
27#include "sun6i_csi.h"
28#include "sun6i_csi_reg.h"
29
30#define MODULE_NAME "sun6i-csi"
31
32struct sun6i_csi_dev {
33 struct sun6i_csi csi;
34 struct device *dev;
35
36 struct regmap *regmap;
37 struct clk *clk_mod;
38 struct clk *clk_ram;
39 struct reset_control *rstc_bus;
40
41 int planar_offset[3];
42};
43
44static inline struct sun6i_csi_dev *sun6i_csi_to_dev(struct sun6i_csi *csi)
45{
46 return container_of(csi, struct sun6i_csi_dev, csi);
47}
48
49
50bool sun6i_csi_is_format_supported(struct sun6i_csi *csi,
51 u32 pixformat, u32 mbus_code)
52{
53 struct sun6i_csi_dev *sdev = sun6i_csi_to_dev(csi);
54
55
56
57
58
59
60 if ((sdev->csi.v4l2_ep.bus_type == V4L2_MBUS_PARALLEL
61 || sdev->csi.v4l2_ep.bus_type == V4L2_MBUS_BT656)
62 && sdev->csi.v4l2_ep.bus.parallel.bus_width == 16) {
63 switch (pixformat) {
64 case V4L2_PIX_FMT_HM12:
65 case V4L2_PIX_FMT_NV12:
66 case V4L2_PIX_FMT_NV21:
67 case V4L2_PIX_FMT_NV16:
68 case V4L2_PIX_FMT_NV61:
69 case V4L2_PIX_FMT_YUV420:
70 case V4L2_PIX_FMT_YVU420:
71 case V4L2_PIX_FMT_YUV422P:
72 switch (mbus_code) {
73 case MEDIA_BUS_FMT_UYVY8_1X16:
74 case MEDIA_BUS_FMT_VYUY8_1X16:
75 case MEDIA_BUS_FMT_YUYV8_1X16:
76 case MEDIA_BUS_FMT_YVYU8_1X16:
77 return true;
78 default:
79 dev_dbg(sdev->dev, "Unsupported mbus code: 0x%x\n",
80 mbus_code);
81 break;
82 }
83 break;
84 default:
85 dev_dbg(sdev->dev, "Unsupported pixformat: 0x%x\n",
86 pixformat);
87 break;
88 }
89 return false;
90 }
91
92 switch (pixformat) {
93 case V4L2_PIX_FMT_SBGGR8:
94 return (mbus_code == MEDIA_BUS_FMT_SBGGR8_1X8);
95 case V4L2_PIX_FMT_SGBRG8:
96 return (mbus_code == MEDIA_BUS_FMT_SGBRG8_1X8);
97 case V4L2_PIX_FMT_SGRBG8:
98 return (mbus_code == MEDIA_BUS_FMT_SGRBG8_1X8);
99 case V4L2_PIX_FMT_SRGGB8:
100 return (mbus_code == MEDIA_BUS_FMT_SRGGB8_1X8);
101 case V4L2_PIX_FMT_SBGGR10:
102 return (mbus_code == MEDIA_BUS_FMT_SBGGR10_1X10);
103 case V4L2_PIX_FMT_SGBRG10:
104 return (mbus_code == MEDIA_BUS_FMT_SGBRG10_1X10);
105 case V4L2_PIX_FMT_SGRBG10:
106 return (mbus_code == MEDIA_BUS_FMT_SGRBG10_1X10);
107 case V4L2_PIX_FMT_SRGGB10:
108 return (mbus_code == MEDIA_BUS_FMT_SRGGB10_1X10);
109 case V4L2_PIX_FMT_SBGGR12:
110 return (mbus_code == MEDIA_BUS_FMT_SBGGR12_1X12);
111 case V4L2_PIX_FMT_SGBRG12:
112 return (mbus_code == MEDIA_BUS_FMT_SGBRG12_1X12);
113 case V4L2_PIX_FMT_SGRBG12:
114 return (mbus_code == MEDIA_BUS_FMT_SGRBG12_1X12);
115 case V4L2_PIX_FMT_SRGGB12:
116 return (mbus_code == MEDIA_BUS_FMT_SRGGB12_1X12);
117
118 case V4L2_PIX_FMT_YUYV:
119 return (mbus_code == MEDIA_BUS_FMT_YUYV8_2X8);
120 case V4L2_PIX_FMT_YVYU:
121 return (mbus_code == MEDIA_BUS_FMT_YVYU8_2X8);
122 case V4L2_PIX_FMT_UYVY:
123 return (mbus_code == MEDIA_BUS_FMT_UYVY8_2X8);
124 case V4L2_PIX_FMT_VYUY:
125 return (mbus_code == MEDIA_BUS_FMT_VYUY8_2X8);
126
127 case V4L2_PIX_FMT_HM12:
128 case V4L2_PIX_FMT_NV12:
129 case V4L2_PIX_FMT_NV21:
130 case V4L2_PIX_FMT_NV16:
131 case V4L2_PIX_FMT_NV61:
132 case V4L2_PIX_FMT_YUV420:
133 case V4L2_PIX_FMT_YVU420:
134 case V4L2_PIX_FMT_YUV422P:
135 switch (mbus_code) {
136 case MEDIA_BUS_FMT_UYVY8_2X8:
137 case MEDIA_BUS_FMT_VYUY8_2X8:
138 case MEDIA_BUS_FMT_YUYV8_2X8:
139 case MEDIA_BUS_FMT_YVYU8_2X8:
140 return true;
141 default:
142 dev_dbg(sdev->dev, "Unsupported mbus code: 0x%x\n",
143 mbus_code);
144 break;
145 }
146 break;
147
148 case V4L2_PIX_FMT_RGB565:
149 return (mbus_code == MEDIA_BUS_FMT_RGB565_2X8_LE);
150 case V4L2_PIX_FMT_RGB565X:
151 return (mbus_code == MEDIA_BUS_FMT_RGB565_2X8_BE);
152
153 case V4L2_PIX_FMT_JPEG:
154 return (mbus_code == MEDIA_BUS_FMT_JPEG_1X8);
155
156 default:
157 dev_dbg(sdev->dev, "Unsupported pixformat: 0x%x\n", pixformat);
158 break;
159 }
160
161 return false;
162}
163
164int sun6i_csi_set_power(struct sun6i_csi *csi, bool enable)
165{
166 struct sun6i_csi_dev *sdev = sun6i_csi_to_dev(csi);
167 struct device *dev = sdev->dev;
168 struct regmap *regmap = sdev->regmap;
169 int ret;
170
171 if (!enable) {
172 regmap_update_bits(regmap, CSI_EN_REG, CSI_EN_CSI_EN, 0);
173
174 clk_disable_unprepare(sdev->clk_ram);
175 if (of_device_is_compatible(dev->of_node,
176 "allwinner,sun50i-a64-csi"))
177 clk_rate_exclusive_put(sdev->clk_mod);
178 clk_disable_unprepare(sdev->clk_mod);
179 reset_control_assert(sdev->rstc_bus);
180 return 0;
181 }
182
183 ret = clk_prepare_enable(sdev->clk_mod);
184 if (ret) {
185 dev_err(sdev->dev, "Enable csi clk err %d\n", ret);
186 return ret;
187 }
188
189 if (of_device_is_compatible(dev->of_node, "allwinner,sun50i-a64-csi"))
190 clk_set_rate_exclusive(sdev->clk_mod, 300000000);
191
192 ret = clk_prepare_enable(sdev->clk_ram);
193 if (ret) {
194 dev_err(sdev->dev, "Enable clk_dram_csi clk err %d\n", ret);
195 goto clk_mod_disable;
196 }
197
198 ret = reset_control_deassert(sdev->rstc_bus);
199 if (ret) {
200 dev_err(sdev->dev, "reset err %d\n", ret);
201 goto clk_ram_disable;
202 }
203
204 regmap_update_bits(regmap, CSI_EN_REG, CSI_EN_CSI_EN, CSI_EN_CSI_EN);
205
206 return 0;
207
208clk_ram_disable:
209 clk_disable_unprepare(sdev->clk_ram);
210clk_mod_disable:
211 if (of_device_is_compatible(dev->of_node, "allwinner,sun50i-a64-csi"))
212 clk_rate_exclusive_put(sdev->clk_mod);
213 clk_disable_unprepare(sdev->clk_mod);
214 return ret;
215}
216
217static enum csi_input_fmt get_csi_input_format(struct sun6i_csi_dev *sdev,
218 u32 mbus_code, u32 pixformat)
219{
220
221 if ((mbus_code & 0xF000) != 0x2000)
222 return CSI_INPUT_FORMAT_RAW;
223
224 switch (pixformat) {
225 case V4L2_PIX_FMT_YUYV:
226 case V4L2_PIX_FMT_YVYU:
227 case V4L2_PIX_FMT_UYVY:
228 case V4L2_PIX_FMT_VYUY:
229 return CSI_INPUT_FORMAT_RAW;
230 default:
231 break;
232 }
233
234
235 dev_dbg(sdev->dev, "Select YUV422 as default input format of CSI.\n");
236 return CSI_INPUT_FORMAT_YUV422;
237}
238
239static enum csi_output_fmt get_csi_output_format(struct sun6i_csi_dev *sdev,
240 u32 pixformat, u32 field)
241{
242 bool buf_interlaced = false;
243
244 if (field == V4L2_FIELD_INTERLACED
245 || field == V4L2_FIELD_INTERLACED_TB
246 || field == V4L2_FIELD_INTERLACED_BT)
247 buf_interlaced = true;
248
249 switch (pixformat) {
250 case V4L2_PIX_FMT_SBGGR8:
251 case V4L2_PIX_FMT_SGBRG8:
252 case V4L2_PIX_FMT_SGRBG8:
253 case V4L2_PIX_FMT_SRGGB8:
254 return buf_interlaced ? CSI_FRAME_RAW_8 : CSI_FIELD_RAW_8;
255 case V4L2_PIX_FMT_SBGGR10:
256 case V4L2_PIX_FMT_SGBRG10:
257 case V4L2_PIX_FMT_SGRBG10:
258 case V4L2_PIX_FMT_SRGGB10:
259 return buf_interlaced ? CSI_FRAME_RAW_10 : CSI_FIELD_RAW_10;
260 case V4L2_PIX_FMT_SBGGR12:
261 case V4L2_PIX_FMT_SGBRG12:
262 case V4L2_PIX_FMT_SGRBG12:
263 case V4L2_PIX_FMT_SRGGB12:
264 return buf_interlaced ? CSI_FRAME_RAW_12 : CSI_FIELD_RAW_12;
265
266 case V4L2_PIX_FMT_YUYV:
267 case V4L2_PIX_FMT_YVYU:
268 case V4L2_PIX_FMT_UYVY:
269 case V4L2_PIX_FMT_VYUY:
270 return buf_interlaced ? CSI_FRAME_RAW_8 : CSI_FIELD_RAW_8;
271
272 case V4L2_PIX_FMT_HM12:
273 return buf_interlaced ? CSI_FRAME_MB_YUV420 :
274 CSI_FIELD_MB_YUV420;
275 case V4L2_PIX_FMT_NV12:
276 case V4L2_PIX_FMT_NV21:
277 return buf_interlaced ? CSI_FRAME_UV_CB_YUV420 :
278 CSI_FIELD_UV_CB_YUV420;
279 case V4L2_PIX_FMT_YUV420:
280 case V4L2_PIX_FMT_YVU420:
281 return buf_interlaced ? CSI_FRAME_PLANAR_YUV420 :
282 CSI_FIELD_PLANAR_YUV420;
283 case V4L2_PIX_FMT_NV16:
284 case V4L2_PIX_FMT_NV61:
285 return buf_interlaced ? CSI_FRAME_UV_CB_YUV422 :
286 CSI_FIELD_UV_CB_YUV422;
287 case V4L2_PIX_FMT_YUV422P:
288 return buf_interlaced ? CSI_FRAME_PLANAR_YUV422 :
289 CSI_FIELD_PLANAR_YUV422;
290
291 case V4L2_PIX_FMT_RGB565:
292 case V4L2_PIX_FMT_RGB565X:
293 return buf_interlaced ? CSI_FRAME_RGB565 : CSI_FIELD_RGB565;
294
295 case V4L2_PIX_FMT_JPEG:
296 return buf_interlaced ? CSI_FRAME_RAW_8 : CSI_FIELD_RAW_8;
297
298 default:
299 dev_warn(sdev->dev, "Unsupported pixformat: 0x%x\n", pixformat);
300 break;
301 }
302
303 return CSI_FIELD_RAW_8;
304}
305
306static enum csi_input_seq get_csi_input_seq(struct sun6i_csi_dev *sdev,
307 u32 mbus_code, u32 pixformat)
308{
309
310 if ((mbus_code & 0xF000) != 0x2000)
311 return 0;
312
313 switch (pixformat) {
314 case V4L2_PIX_FMT_HM12:
315 case V4L2_PIX_FMT_NV12:
316 case V4L2_PIX_FMT_NV16:
317 case V4L2_PIX_FMT_YUV420:
318 case V4L2_PIX_FMT_YUV422P:
319 switch (mbus_code) {
320 case MEDIA_BUS_FMT_UYVY8_2X8:
321 case MEDIA_BUS_FMT_UYVY8_1X16:
322 return CSI_INPUT_SEQ_UYVY;
323 case MEDIA_BUS_FMT_VYUY8_2X8:
324 case MEDIA_BUS_FMT_VYUY8_1X16:
325 return CSI_INPUT_SEQ_VYUY;
326 case MEDIA_BUS_FMT_YUYV8_2X8:
327 case MEDIA_BUS_FMT_YUYV8_1X16:
328 return CSI_INPUT_SEQ_YUYV;
329 case MEDIA_BUS_FMT_YVYU8_1X16:
330 case MEDIA_BUS_FMT_YVYU8_2X8:
331 return CSI_INPUT_SEQ_YVYU;
332 default:
333 dev_warn(sdev->dev, "Unsupported mbus code: 0x%x\n",
334 mbus_code);
335 break;
336 }
337 break;
338 case V4L2_PIX_FMT_NV21:
339 case V4L2_PIX_FMT_NV61:
340 case V4L2_PIX_FMT_YVU420:
341 switch (mbus_code) {
342 case MEDIA_BUS_FMT_UYVY8_2X8:
343 case MEDIA_BUS_FMT_UYVY8_1X16:
344 return CSI_INPUT_SEQ_VYUY;
345 case MEDIA_BUS_FMT_VYUY8_2X8:
346 case MEDIA_BUS_FMT_VYUY8_1X16:
347 return CSI_INPUT_SEQ_UYVY;
348 case MEDIA_BUS_FMT_YUYV8_2X8:
349 case MEDIA_BUS_FMT_YUYV8_1X16:
350 return CSI_INPUT_SEQ_YVYU;
351 case MEDIA_BUS_FMT_YVYU8_1X16:
352 case MEDIA_BUS_FMT_YVYU8_2X8:
353 return CSI_INPUT_SEQ_YUYV;
354 default:
355 dev_warn(sdev->dev, "Unsupported mbus code: 0x%x\n",
356 mbus_code);
357 break;
358 }
359 break;
360
361 case V4L2_PIX_FMT_YUYV:
362 return CSI_INPUT_SEQ_YUYV;
363
364 default:
365 dev_warn(sdev->dev, "Unsupported pixformat: 0x%x, defaulting to YUYV\n",
366 pixformat);
367 break;
368 }
369
370 return CSI_INPUT_SEQ_YUYV;
371}
372
373static void sun6i_csi_setup_bus(struct sun6i_csi_dev *sdev)
374{
375 struct v4l2_fwnode_endpoint *endpoint = &sdev->csi.v4l2_ep;
376 struct sun6i_csi *csi = &sdev->csi;
377 unsigned char bus_width;
378 u32 flags;
379 u32 cfg;
380 bool input_interlaced = false;
381
382 if (csi->config.field == V4L2_FIELD_INTERLACED
383 || csi->config.field == V4L2_FIELD_INTERLACED_TB
384 || csi->config.field == V4L2_FIELD_INTERLACED_BT)
385 input_interlaced = true;
386
387 bus_width = endpoint->bus.parallel.bus_width;
388
389 regmap_read(sdev->regmap, CSI_IF_CFG_REG, &cfg);
390
391 cfg &= ~(CSI_IF_CFG_CSI_IF_MASK | CSI_IF_CFG_MIPI_IF_MASK |
392 CSI_IF_CFG_IF_DATA_WIDTH_MASK |
393 CSI_IF_CFG_CLK_POL_MASK | CSI_IF_CFG_VREF_POL_MASK |
394 CSI_IF_CFG_HREF_POL_MASK | CSI_IF_CFG_FIELD_MASK |
395 CSI_IF_CFG_SRC_TYPE_MASK);
396
397 if (input_interlaced)
398 cfg |= CSI_IF_CFG_SRC_TYPE_INTERLACED;
399 else
400 cfg |= CSI_IF_CFG_SRC_TYPE_PROGRESSED;
401
402 switch (endpoint->bus_type) {
403 case V4L2_MBUS_PARALLEL:
404 cfg |= CSI_IF_CFG_MIPI_IF_CSI;
405
406 flags = endpoint->bus.parallel.flags;
407
408 cfg |= (bus_width == 16) ? CSI_IF_CFG_CSI_IF_YUV422_16BIT :
409 CSI_IF_CFG_CSI_IF_YUV422_INTLV;
410
411 if (flags & V4L2_MBUS_FIELD_EVEN_LOW)
412 cfg |= CSI_IF_CFG_FIELD_POSITIVE;
413
414 if (flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)
415 cfg |= CSI_IF_CFG_VREF_POL_POSITIVE;
416 if (flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)
417 cfg |= CSI_IF_CFG_HREF_POL_POSITIVE;
418
419 if (flags & V4L2_MBUS_PCLK_SAMPLE_RISING)
420 cfg |= CSI_IF_CFG_CLK_POL_FALLING_EDGE;
421 break;
422 case V4L2_MBUS_BT656:
423 cfg |= CSI_IF_CFG_MIPI_IF_CSI;
424
425 flags = endpoint->bus.parallel.flags;
426
427 cfg |= (bus_width == 16) ? CSI_IF_CFG_CSI_IF_BT1120 :
428 CSI_IF_CFG_CSI_IF_BT656;
429
430 if (flags & V4L2_MBUS_FIELD_EVEN_LOW)
431 cfg |= CSI_IF_CFG_FIELD_POSITIVE;
432
433 if (flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)
434 cfg |= CSI_IF_CFG_CLK_POL_FALLING_EDGE;
435 break;
436 default:
437 dev_warn(sdev->dev, "Unsupported bus type: %d\n",
438 endpoint->bus_type);
439 break;
440 }
441
442 switch (bus_width) {
443 case 8:
444 cfg |= CSI_IF_CFG_IF_DATA_WIDTH_8BIT;
445 break;
446 case 10:
447 cfg |= CSI_IF_CFG_IF_DATA_WIDTH_10BIT;
448 break;
449 case 12:
450 cfg |= CSI_IF_CFG_IF_DATA_WIDTH_12BIT;
451 break;
452 case 16:
453 break;
454 default:
455 dev_warn(sdev->dev, "Unsupported bus width: %u\n", bus_width);
456 break;
457 }
458
459 regmap_write(sdev->regmap, CSI_IF_CFG_REG, cfg);
460}
461
462static void sun6i_csi_set_format(struct sun6i_csi_dev *sdev)
463{
464 struct sun6i_csi *csi = &sdev->csi;
465 u32 cfg;
466 u32 val;
467
468 regmap_read(sdev->regmap, CSI_CH_CFG_REG, &cfg);
469
470 cfg &= ~(CSI_CH_CFG_INPUT_FMT_MASK |
471 CSI_CH_CFG_OUTPUT_FMT_MASK | CSI_CH_CFG_VFLIP_EN |
472 CSI_CH_CFG_HFLIP_EN | CSI_CH_CFG_FIELD_SEL_MASK |
473 CSI_CH_CFG_INPUT_SEQ_MASK);
474
475 val = get_csi_input_format(sdev, csi->config.code,
476 csi->config.pixelformat);
477 cfg |= CSI_CH_CFG_INPUT_FMT(val);
478
479 val = get_csi_output_format(sdev, csi->config.pixelformat,
480 csi->config.field);
481 cfg |= CSI_CH_CFG_OUTPUT_FMT(val);
482
483 val = get_csi_input_seq(sdev, csi->config.code,
484 csi->config.pixelformat);
485 cfg |= CSI_CH_CFG_INPUT_SEQ(val);
486
487 if (csi->config.field == V4L2_FIELD_TOP)
488 cfg |= CSI_CH_CFG_FIELD_SEL_FIELD0;
489 else if (csi->config.field == V4L2_FIELD_BOTTOM)
490 cfg |= CSI_CH_CFG_FIELD_SEL_FIELD1;
491 else
492 cfg |= CSI_CH_CFG_FIELD_SEL_BOTH;
493
494 regmap_write(sdev->regmap, CSI_CH_CFG_REG, cfg);
495}
496
497static void sun6i_csi_set_window(struct sun6i_csi_dev *sdev)
498{
499 struct sun6i_csi_config *config = &sdev->csi.config;
500 u32 bytesperline_y;
501 u32 bytesperline_c;
502 int *planar_offset = sdev->planar_offset;
503 u32 width = config->width;
504 u32 height = config->height;
505 u32 hor_len = width;
506
507 switch (config->pixelformat) {
508 case V4L2_PIX_FMT_YUYV:
509 case V4L2_PIX_FMT_YVYU:
510 case V4L2_PIX_FMT_UYVY:
511 case V4L2_PIX_FMT_VYUY:
512 dev_dbg(sdev->dev,
513 "Horizontal length should be 2 times of width for packed YUV formats!\n");
514 hor_len = width * 2;
515 break;
516 default:
517 break;
518 }
519
520 regmap_write(sdev->regmap, CSI_CH_HSIZE_REG,
521 CSI_CH_HSIZE_HOR_LEN(hor_len) |
522 CSI_CH_HSIZE_HOR_START(0));
523 regmap_write(sdev->regmap, CSI_CH_VSIZE_REG,
524 CSI_CH_VSIZE_VER_LEN(height) |
525 CSI_CH_VSIZE_VER_START(0));
526
527 planar_offset[0] = 0;
528 switch (config->pixelformat) {
529 case V4L2_PIX_FMT_HM12:
530 case V4L2_PIX_FMT_NV12:
531 case V4L2_PIX_FMT_NV21:
532 case V4L2_PIX_FMT_NV16:
533 case V4L2_PIX_FMT_NV61:
534 bytesperline_y = width;
535 bytesperline_c = width;
536 planar_offset[1] = bytesperline_y * height;
537 planar_offset[2] = -1;
538 break;
539 case V4L2_PIX_FMT_YUV420:
540 case V4L2_PIX_FMT_YVU420:
541 bytesperline_y = width;
542 bytesperline_c = width / 2;
543 planar_offset[1] = bytesperline_y * height;
544 planar_offset[2] = planar_offset[1] +
545 bytesperline_c * height / 2;
546 break;
547 case V4L2_PIX_FMT_YUV422P:
548 bytesperline_y = width;
549 bytesperline_c = width / 2;
550 planar_offset[1] = bytesperline_y * height;
551 planar_offset[2] = planar_offset[1] +
552 bytesperline_c * height;
553 break;
554 default:
555 dev_dbg(sdev->dev,
556 "Calculating pixelformat(0x%x)'s bytesperline as a packed format\n",
557 config->pixelformat);
558 bytesperline_y = (sun6i_csi_get_bpp(config->pixelformat) *
559 config->width) / 8;
560 bytesperline_c = 0;
561 planar_offset[1] = -1;
562 planar_offset[2] = -1;
563 break;
564 }
565
566 regmap_write(sdev->regmap, CSI_CH_BUF_LEN_REG,
567 CSI_CH_BUF_LEN_BUF_LEN_C(bytesperline_c) |
568 CSI_CH_BUF_LEN_BUF_LEN_Y(bytesperline_y));
569}
570
571int sun6i_csi_update_config(struct sun6i_csi *csi,
572 struct sun6i_csi_config *config)
573{
574 struct sun6i_csi_dev *sdev = sun6i_csi_to_dev(csi);
575
576 if (!config)
577 return -EINVAL;
578
579 memcpy(&csi->config, config, sizeof(csi->config));
580
581 sun6i_csi_setup_bus(sdev);
582 sun6i_csi_set_format(sdev);
583 sun6i_csi_set_window(sdev);
584
585 return 0;
586}
587
588void sun6i_csi_update_buf_addr(struct sun6i_csi *csi, dma_addr_t addr)
589{
590 struct sun6i_csi_dev *sdev = sun6i_csi_to_dev(csi);
591
592 regmap_write(sdev->regmap, CSI_CH_F0_BUFA_REG,
593 (addr + sdev->planar_offset[0]) >> 2);
594 if (sdev->planar_offset[1] != -1)
595 regmap_write(sdev->regmap, CSI_CH_F1_BUFA_REG,
596 (addr + sdev->planar_offset[1]) >> 2);
597 if (sdev->planar_offset[2] != -1)
598 regmap_write(sdev->regmap, CSI_CH_F2_BUFA_REG,
599 (addr + sdev->planar_offset[2]) >> 2);
600}
601
602void sun6i_csi_set_stream(struct sun6i_csi *csi, bool enable)
603{
604 struct sun6i_csi_dev *sdev = sun6i_csi_to_dev(csi);
605 struct regmap *regmap = sdev->regmap;
606
607 if (!enable) {
608 regmap_update_bits(regmap, CSI_CAP_REG, CSI_CAP_CH0_VCAP_ON, 0);
609 regmap_write(regmap, CSI_CH_INT_EN_REG, 0);
610 return;
611 }
612
613 regmap_write(regmap, CSI_CH_INT_STA_REG, 0xFF);
614 regmap_write(regmap, CSI_CH_INT_EN_REG,
615 CSI_CH_INT_EN_HB_OF_INT_EN |
616 CSI_CH_INT_EN_FIFO2_OF_INT_EN |
617 CSI_CH_INT_EN_FIFO1_OF_INT_EN |
618 CSI_CH_INT_EN_FIFO0_OF_INT_EN |
619 CSI_CH_INT_EN_FD_INT_EN |
620 CSI_CH_INT_EN_CD_INT_EN);
621
622 regmap_update_bits(regmap, CSI_CAP_REG, CSI_CAP_CH0_VCAP_ON,
623 CSI_CAP_CH0_VCAP_ON);
624}
625
626
627
628
629static int sun6i_csi_link_entity(struct sun6i_csi *csi,
630 struct media_entity *entity,
631 struct fwnode_handle *fwnode)
632{
633 struct media_entity *sink;
634 struct media_pad *sink_pad;
635 int src_pad_index;
636 int ret;
637
638 ret = media_entity_get_fwnode_pad(entity, fwnode, MEDIA_PAD_FL_SOURCE);
639 if (ret < 0) {
640 dev_err(csi->dev, "%s: no source pad in external entity %s\n",
641 __func__, entity->name);
642 return -EINVAL;
643 }
644
645 src_pad_index = ret;
646
647 sink = &csi->video.vdev.entity;
648 sink_pad = &csi->video.pad;
649
650 dev_dbg(csi->dev, "creating %s:%u -> %s:%u link\n",
651 entity->name, src_pad_index, sink->name, sink_pad->index);
652 ret = media_create_pad_link(entity, src_pad_index, sink,
653 sink_pad->index,
654 MEDIA_LNK_FL_ENABLED |
655 MEDIA_LNK_FL_IMMUTABLE);
656 if (ret < 0) {
657 dev_err(csi->dev, "failed to create %s:%u -> %s:%u link\n",
658 entity->name, src_pad_index,
659 sink->name, sink_pad->index);
660 return ret;
661 }
662
663 return 0;
664}
665
666static int sun6i_subdev_notify_complete(struct v4l2_async_notifier *notifier)
667{
668 struct sun6i_csi *csi = container_of(notifier, struct sun6i_csi,
669 notifier);
670 struct v4l2_device *v4l2_dev = &csi->v4l2_dev;
671 struct v4l2_subdev *sd;
672 int ret;
673
674 dev_dbg(csi->dev, "notify complete, all subdevs registered\n");
675
676 sd = list_first_entry(&v4l2_dev->subdevs, struct v4l2_subdev, list);
677 if (!sd)
678 return -EINVAL;
679
680 ret = sun6i_csi_link_entity(csi, &sd->entity, sd->fwnode);
681 if (ret < 0)
682 return ret;
683
684 ret = v4l2_device_register_subdev_nodes(&csi->v4l2_dev);
685 if (ret < 0)
686 return ret;
687
688 return media_device_register(&csi->media_dev);
689}
690
691static const struct v4l2_async_notifier_operations sun6i_csi_async_ops = {
692 .complete = sun6i_subdev_notify_complete,
693};
694
695static int sun6i_csi_fwnode_parse(struct device *dev,
696 struct v4l2_fwnode_endpoint *vep,
697 struct v4l2_async_subdev *asd)
698{
699 struct sun6i_csi *csi = dev_get_drvdata(dev);
700
701 if (vep->base.port || vep->base.id) {
702 dev_warn(dev, "Only support a single port with one endpoint\n");
703 return -ENOTCONN;
704 }
705
706 switch (vep->bus_type) {
707 case V4L2_MBUS_PARALLEL:
708 case V4L2_MBUS_BT656:
709 csi->v4l2_ep = *vep;
710 return 0;
711 default:
712 dev_err(dev, "Unsupported media bus type\n");
713 return -ENOTCONN;
714 }
715}
716
717static void sun6i_csi_v4l2_cleanup(struct sun6i_csi *csi)
718{
719 media_device_unregister(&csi->media_dev);
720 v4l2_async_notifier_unregister(&csi->notifier);
721 v4l2_async_notifier_cleanup(&csi->notifier);
722 sun6i_video_cleanup(&csi->video);
723 v4l2_device_unregister(&csi->v4l2_dev);
724 v4l2_ctrl_handler_free(&csi->ctrl_handler);
725 media_device_cleanup(&csi->media_dev);
726}
727
728static int sun6i_csi_v4l2_init(struct sun6i_csi *csi)
729{
730 int ret;
731
732 csi->media_dev.dev = csi->dev;
733 strscpy(csi->media_dev.model, "Allwinner Video Capture Device",
734 sizeof(csi->media_dev.model));
735 csi->media_dev.hw_revision = 0;
736 snprintf(csi->media_dev.bus_info, sizeof(csi->media_dev.bus_info),
737 "platform:%s", dev_name(csi->dev));
738
739 media_device_init(&csi->media_dev);
740 v4l2_async_notifier_init(&csi->notifier);
741
742 ret = v4l2_ctrl_handler_init(&csi->ctrl_handler, 0);
743 if (ret) {
744 dev_err(csi->dev, "V4L2 controls handler init failed (%d)\n",
745 ret);
746 goto clean_media;
747 }
748
749 csi->v4l2_dev.mdev = &csi->media_dev;
750 csi->v4l2_dev.ctrl_handler = &csi->ctrl_handler;
751 ret = v4l2_device_register(csi->dev, &csi->v4l2_dev);
752 if (ret) {
753 dev_err(csi->dev, "V4L2 device registration failed (%d)\n",
754 ret);
755 goto free_ctrl;
756 }
757
758 ret = sun6i_video_init(&csi->video, csi, "sun6i-csi");
759 if (ret)
760 goto unreg_v4l2;
761
762 ret = v4l2_async_notifier_parse_fwnode_endpoints(csi->dev,
763 &csi->notifier,
764 sizeof(struct v4l2_async_subdev),
765 sun6i_csi_fwnode_parse);
766 if (ret)
767 goto clean_video;
768
769 csi->notifier.ops = &sun6i_csi_async_ops;
770
771 ret = v4l2_async_notifier_register(&csi->v4l2_dev, &csi->notifier);
772 if (ret) {
773 dev_err(csi->dev, "notifier registration failed\n");
774 goto clean_video;
775 }
776
777 return 0;
778
779clean_video:
780 sun6i_video_cleanup(&csi->video);
781unreg_v4l2:
782 v4l2_device_unregister(&csi->v4l2_dev);
783free_ctrl:
784 v4l2_ctrl_handler_free(&csi->ctrl_handler);
785clean_media:
786 v4l2_async_notifier_cleanup(&csi->notifier);
787 media_device_cleanup(&csi->media_dev);
788
789 return ret;
790}
791
792
793
794
795static irqreturn_t sun6i_csi_isr(int irq, void *dev_id)
796{
797 struct sun6i_csi_dev *sdev = (struct sun6i_csi_dev *)dev_id;
798 struct regmap *regmap = sdev->regmap;
799 u32 status;
800
801 regmap_read(regmap, CSI_CH_INT_STA_REG, &status);
802
803 if (!(status & 0xFF))
804 return IRQ_NONE;
805
806 if ((status & CSI_CH_INT_STA_FIFO0_OF_PD) ||
807 (status & CSI_CH_INT_STA_FIFO1_OF_PD) ||
808 (status & CSI_CH_INT_STA_FIFO2_OF_PD) ||
809 (status & CSI_CH_INT_STA_HB_OF_PD)) {
810 regmap_write(regmap, CSI_CH_INT_STA_REG, status);
811 regmap_update_bits(regmap, CSI_EN_REG, CSI_EN_CSI_EN, 0);
812 regmap_update_bits(regmap, CSI_EN_REG, CSI_EN_CSI_EN,
813 CSI_EN_CSI_EN);
814 return IRQ_HANDLED;
815 }
816
817 if (status & CSI_CH_INT_STA_FD_PD)
818 sun6i_video_frame_done(&sdev->csi.video);
819
820 regmap_write(regmap, CSI_CH_INT_STA_REG, status);
821
822 return IRQ_HANDLED;
823}
824
825static const struct regmap_config sun6i_csi_regmap_config = {
826 .reg_bits = 32,
827 .reg_stride = 4,
828 .val_bits = 32,
829 .max_register = 0x9c,
830};
831
832static int sun6i_csi_resource_request(struct sun6i_csi_dev *sdev,
833 struct platform_device *pdev)
834{
835 struct resource *res;
836 void __iomem *io_base;
837 int ret;
838 int irq;
839
840 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
841 io_base = devm_ioremap_resource(&pdev->dev, res);
842 if (IS_ERR(io_base))
843 return PTR_ERR(io_base);
844
845 sdev->regmap = devm_regmap_init_mmio_clk(&pdev->dev, "bus", io_base,
846 &sun6i_csi_regmap_config);
847 if (IS_ERR(sdev->regmap)) {
848 dev_err(&pdev->dev, "Failed to init register map\n");
849 return PTR_ERR(sdev->regmap);
850 }
851
852 sdev->clk_mod = devm_clk_get(&pdev->dev, "mod");
853 if (IS_ERR(sdev->clk_mod)) {
854 dev_err(&pdev->dev, "Unable to acquire csi clock\n");
855 return PTR_ERR(sdev->clk_mod);
856 }
857
858 sdev->clk_ram = devm_clk_get(&pdev->dev, "ram");
859 if (IS_ERR(sdev->clk_ram)) {
860 dev_err(&pdev->dev, "Unable to acquire dram-csi clock\n");
861 return PTR_ERR(sdev->clk_ram);
862 }
863
864 sdev->rstc_bus = devm_reset_control_get_shared(&pdev->dev, NULL);
865 if (IS_ERR(sdev->rstc_bus)) {
866 dev_err(&pdev->dev, "Cannot get reset controller\n");
867 return PTR_ERR(sdev->rstc_bus);
868 }
869
870 irq = platform_get_irq(pdev, 0);
871 if (irq < 0)
872 return -ENXIO;
873
874 ret = devm_request_irq(&pdev->dev, irq, sun6i_csi_isr, 0, MODULE_NAME,
875 sdev);
876 if (ret) {
877 dev_err(&pdev->dev, "Cannot request csi IRQ\n");
878 return ret;
879 }
880
881 return 0;
882}
883
884static int sun6i_csi_probe(struct platform_device *pdev)
885{
886 struct sun6i_csi_dev *sdev;
887 int ret;
888
889 sdev = devm_kzalloc(&pdev->dev, sizeof(*sdev), GFP_KERNEL);
890 if (!sdev)
891 return -ENOMEM;
892
893 sdev->dev = &pdev->dev;
894
895 ret = sun6i_csi_resource_request(sdev, pdev);
896 if (ret)
897 return ret;
898
899 platform_set_drvdata(pdev, sdev);
900
901 sdev->csi.dev = &pdev->dev;
902 return sun6i_csi_v4l2_init(&sdev->csi);
903}
904
905static int sun6i_csi_remove(struct platform_device *pdev)
906{
907 struct sun6i_csi_dev *sdev = platform_get_drvdata(pdev);
908
909 sun6i_csi_v4l2_cleanup(&sdev->csi);
910
911 return 0;
912}
913
914static const struct of_device_id sun6i_csi_of_match[] = {
915 { .compatible = "allwinner,sun6i-a31-csi", },
916 { .compatible = "allwinner,sun8i-a83t-csi", },
917 { .compatible = "allwinner,sun8i-h3-csi", },
918 { .compatible = "allwinner,sun8i-v3s-csi", },
919 { .compatible = "allwinner,sun50i-a64-csi", },
920 {},
921};
922MODULE_DEVICE_TABLE(of, sun6i_csi_of_match);
923
924static struct platform_driver sun6i_csi_platform_driver = {
925 .probe = sun6i_csi_probe,
926 .remove = sun6i_csi_remove,
927 .driver = {
928 .name = MODULE_NAME,
929 .of_match_table = of_match_ptr(sun6i_csi_of_match),
930 },
931};
932module_platform_driver(sun6i_csi_platform_driver);
933
934MODULE_DESCRIPTION("Allwinner V3s Camera Sensor Interface driver");
935MODULE_AUTHOR("Yong Deng <yong.deng@magewell.com>");
936MODULE_LICENSE("GPL");
937
