1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * TI VPFE capture Driver
4 *
5 * Copyright (C) 2013 - 2014 Texas Instruments, Inc.
6 *
7 * Benoit Parrot <bparrot@ti.com>
8 * Lad, Prabhakar <prabhakar.csengg@gmail.com>
9 */
10
11 #include <linux/delay.h>
12 #include <linux/err.h>
13 #include <linux/init.h>
14 #include <linux/interrupt.h>
15 #include <linux/io.h>
16 #include <linux/module.h>
17 #include <linux/of_graph.h>
18 #include <linux/pinctrl/consumer.h>
19 #include <linux/platform_device.h>
20 #include <linux/pm_runtime.h>
21 #include <linux/slab.h>
22 #include <linux/uaccess.h>
23 #include <linux/videodev2.h>
24
25 #include <media/v4l2-common.h>
26 #include <media/v4l2-ctrls.h>
27 #include <media/v4l2-event.h>
28 #include <media/v4l2-fwnode.h>
29 #include <media/v4l2-rect.h>
30
31 #include "am437x-vpfe.h"
32
33 #define VPFE_MODULE_NAME "vpfe"
34 #define VPFE_VERSION "0.1.0"
35
36 static int debug;
37 module_param(debug, int, 0644);
38 MODULE_PARM_DESC(debug, "Debug level 0-8");
39
40 #define vpfe_dbg(level, dev, fmt, arg...) \
41 v4l2_dbg(level, debug, &dev->v4l2_dev, fmt, ##arg)
42 #define vpfe_info(dev, fmt, arg...) \
43 v4l2_info(&dev->v4l2_dev, fmt, ##arg)
44 #define vpfe_err(dev, fmt, arg...) \
45 v4l2_err(&dev->v4l2_dev, fmt, ##arg)
46
47 /* standard information */
48 struct vpfe_standard {
49 v4l2_std_id std_id;
50 unsigned int width;
51 unsigned int height;
52 struct v4l2_fract pixelaspect;
53 int frame_format;
54 };
55
56 static const struct vpfe_standard vpfe_standards[] = {
57 {V4L2_STD_525_60, 720, 480, {11, 10}, 1},
58 {V4L2_STD_625_50, 720, 576, {54, 59}, 1},
59 };
60
61 static struct vpfe_fmt formats[VPFE_NUM_FORMATS] = {
62 {
63 .fourcc = V4L2_PIX_FMT_YUYV,
64 .code = MEDIA_BUS_FMT_YUYV8_2X8,
65 .bitsperpixel = 16,
66 }, {
67 .fourcc = V4L2_PIX_FMT_UYVY,
68 .code = MEDIA_BUS_FMT_UYVY8_2X8,
69 .bitsperpixel = 16,
70 }, {
71 .fourcc = V4L2_PIX_FMT_YVYU,
72 .code = MEDIA_BUS_FMT_YVYU8_2X8,
73 .bitsperpixel = 16,
74 }, {
75 .fourcc = V4L2_PIX_FMT_VYUY,
76 .code = MEDIA_BUS_FMT_VYUY8_2X8,
77 .bitsperpixel = 16,
78 }, {
79 .fourcc = V4L2_PIX_FMT_SBGGR8,
80 .code = MEDIA_BUS_FMT_SBGGR8_1X8,
81 .bitsperpixel = 8,
82 }, {
83 .fourcc = V4L2_PIX_FMT_SGBRG8,
84 .code = MEDIA_BUS_FMT_SGBRG8_1X8,
85 .bitsperpixel = 8,
86 }, {
87 .fourcc = V4L2_PIX_FMT_SGRBG8,
88 .code = MEDIA_BUS_FMT_SGRBG8_1X8,
89 .bitsperpixel = 8,
90 }, {
91 .fourcc = V4L2_PIX_FMT_SRGGB8,
92 .code = MEDIA_BUS_FMT_SRGGB8_1X8,
93 .bitsperpixel = 8,
94 }, {
95 .fourcc = V4L2_PIX_FMT_RGB565,
96 .code = MEDIA_BUS_FMT_RGB565_2X8_LE,
97 .bitsperpixel = 16,
98 }, {
99 .fourcc = V4L2_PIX_FMT_RGB565X,
100 .code = MEDIA_BUS_FMT_RGB565_2X8_BE,
101 .bitsperpixel = 16,
102 },
103 };
104
105 static int __subdev_get_format(struct vpfe_device *vpfe,
106 struct v4l2_mbus_framefmt *fmt);
107 static int vpfe_calc_format_size(struct vpfe_device *vpfe,
108 const struct vpfe_fmt *fmt,
109 struct v4l2_format *f);
110
find_format_by_code(struct vpfe_device * vpfe,unsigned int code)111 static struct vpfe_fmt *find_format_by_code(struct vpfe_device *vpfe,
112 unsigned int code)
113 {
114 struct vpfe_fmt *fmt;
115 unsigned int k;
116
117 for (k = 0; k < vpfe->num_active_fmt; k++) {
118 fmt = vpfe->active_fmt[k];
119 if (fmt->code == code)
120 return fmt;
121 }
122
123 return NULL;
124 }
125
find_format_by_pix(struct vpfe_device * vpfe,unsigned int pixelformat)126 static struct vpfe_fmt *find_format_by_pix(struct vpfe_device *vpfe,
127 unsigned int pixelformat)
128 {
129 struct vpfe_fmt *fmt;
130 unsigned int k;
131
132 for (k = 0; k < vpfe->num_active_fmt; k++) {
133 fmt = vpfe->active_fmt[k];
134 if (fmt->fourcc == pixelformat)
135 return fmt;
136 }
137
138 return NULL;
139 }
140
__get_bytesperpixel(struct vpfe_device * vpfe,const struct vpfe_fmt * fmt)141 static unsigned int __get_bytesperpixel(struct vpfe_device *vpfe,
142 const struct vpfe_fmt *fmt)
143 {
144 struct vpfe_subdev_info *sdinfo = vpfe->current_subdev;
145 unsigned int bus_width = sdinfo->vpfe_param.bus_width;
146 u32 bpp, bus_width_bytes, clocksperpixel;
147
148 bus_width_bytes = ALIGN(bus_width, 8) >> 3;
149 clocksperpixel = DIV_ROUND_UP(fmt->bitsperpixel, bus_width);
150 bpp = clocksperpixel * bus_width_bytes;
151
152 return bpp;
153 }
154
155 /* Print Four-character-code (FOURCC) */
print_fourcc(u32 fmt)156 static char *print_fourcc(u32 fmt)
157 {
158 static char code[5];
159
160 code[0] = (unsigned char)(fmt & 0xff);
161 code[1] = (unsigned char)((fmt >> 8) & 0xff);
162 code[2] = (unsigned char)((fmt >> 16) & 0xff);
163 code[3] = (unsigned char)((fmt >> 24) & 0xff);
164 code[4] = '\0';
165
166 return code;
167 }
168
vpfe_reg_read(struct vpfe_ccdc * ccdc,u32 offset)169 static inline u32 vpfe_reg_read(struct vpfe_ccdc *ccdc, u32 offset)
170 {
171 return ioread32(ccdc->ccdc_cfg.base_addr + offset);
172 }
173
vpfe_reg_write(struct vpfe_ccdc * ccdc,u32 val,u32 offset)174 static inline void vpfe_reg_write(struct vpfe_ccdc *ccdc, u32 val, u32 offset)
175 {
176 iowrite32(val, ccdc->ccdc_cfg.base_addr + offset);
177 }
178
to_vpfe(struct vpfe_ccdc * ccdc)179 static inline struct vpfe_device *to_vpfe(struct vpfe_ccdc *ccdc)
180 {
181 return container_of(ccdc, struct vpfe_device, ccdc);
182 }
183
184 static inline
to_vpfe_buffer(struct vb2_v4l2_buffer * vb)185 struct vpfe_cap_buffer *to_vpfe_buffer(struct vb2_v4l2_buffer *vb)
186 {
187 return container_of(vb, struct vpfe_cap_buffer, vb);
188 }
189
vpfe_pcr_enable(struct vpfe_ccdc * ccdc,int flag)190 static inline void vpfe_pcr_enable(struct vpfe_ccdc *ccdc, int flag)
191 {
192 vpfe_reg_write(ccdc, !!flag, VPFE_PCR);
193 }
194
vpfe_config_enable(struct vpfe_ccdc * ccdc,int flag)195 static void vpfe_config_enable(struct vpfe_ccdc *ccdc, int flag)
196 {
197 unsigned int cfg;
198
199 if (!flag) {
200 cfg = vpfe_reg_read(ccdc, VPFE_CONFIG);
201 cfg &= ~(VPFE_CONFIG_EN_ENABLE << VPFE_CONFIG_EN_SHIFT);
202 } else {
203 cfg = VPFE_CONFIG_EN_ENABLE << VPFE_CONFIG_EN_SHIFT;
204 }
205
206 vpfe_reg_write(ccdc, cfg, VPFE_CONFIG);
207 }
208
vpfe_ccdc_setwin(struct vpfe_ccdc * ccdc,struct v4l2_rect * image_win,enum ccdc_frmfmt frm_fmt,int bpp)209 static void vpfe_ccdc_setwin(struct vpfe_ccdc *ccdc,
210 struct v4l2_rect *image_win,
211 enum ccdc_frmfmt frm_fmt,
212 int bpp)
213 {
214 int horz_start, horz_nr_pixels;
215 int vert_start, vert_nr_lines;
216 int val, mid_img;
217
218 /*
219 * ppc - per pixel count. indicates how many pixels per cell
220 * output to SDRAM. example, for ycbcr, it is one y and one c, so 2.
221 * raw capture this is 1
222 */
223 horz_start = image_win->left * bpp;
224 horz_nr_pixels = (image_win->width * bpp) - 1;
225 vpfe_reg_write(ccdc, (horz_start << VPFE_HORZ_INFO_SPH_SHIFT) |
226 horz_nr_pixels, VPFE_HORZ_INFO);
227
228 vert_start = image_win->top;
229
230 if (frm_fmt == CCDC_FRMFMT_INTERLACED) {
231 vert_nr_lines = (image_win->height >> 1) - 1;
232 vert_start >>= 1;
233 /* configure VDINT0 */
234 val = (vert_start << VPFE_VDINT_VDINT0_SHIFT);
235 } else {
236 vert_nr_lines = image_win->height - 1;
237 /*
238 * configure VDINT0 and VDINT1. VDINT1 will be at half
239 * of image height
240 */
241 mid_img = vert_start + (image_win->height / 2);
242 val = (vert_start << VPFE_VDINT_VDINT0_SHIFT) |
243 (mid_img & VPFE_VDINT_VDINT1_MASK);
244 }
245
246 vpfe_reg_write(ccdc, val, VPFE_VDINT);
247
248 vpfe_reg_write(ccdc, (vert_start << VPFE_VERT_START_SLV0_SHIFT) |
249 vert_start, VPFE_VERT_START);
250 vpfe_reg_write(ccdc, vert_nr_lines, VPFE_VERT_LINES);
251 }
252
vpfe_reg_dump(struct vpfe_ccdc * ccdc)253 static void vpfe_reg_dump(struct vpfe_ccdc *ccdc)
254 {
255 struct vpfe_device *vpfe = to_vpfe(ccdc);
256
257 vpfe_dbg(3, vpfe, "ALAW: 0x%x\n", vpfe_reg_read(ccdc, VPFE_ALAW));
258 vpfe_dbg(3, vpfe, "CLAMP: 0x%x\n", vpfe_reg_read(ccdc, VPFE_CLAMP));
259 vpfe_dbg(3, vpfe, "DCSUB: 0x%x\n", vpfe_reg_read(ccdc, VPFE_DCSUB));
260 vpfe_dbg(3, vpfe, "BLKCMP: 0x%x\n", vpfe_reg_read(ccdc, VPFE_BLKCMP));
261 vpfe_dbg(3, vpfe, "COLPTN: 0x%x\n", vpfe_reg_read(ccdc, VPFE_COLPTN));
262 vpfe_dbg(3, vpfe, "SDOFST: 0x%x\n", vpfe_reg_read(ccdc, VPFE_SDOFST));
263 vpfe_dbg(3, vpfe, "SYN_MODE: 0x%x\n",
264 vpfe_reg_read(ccdc, VPFE_SYNMODE));
265 vpfe_dbg(3, vpfe, "HSIZE_OFF: 0x%x\n",
266 vpfe_reg_read(ccdc, VPFE_HSIZE_OFF));
267 vpfe_dbg(3, vpfe, "HORZ_INFO: 0x%x\n",
268 vpfe_reg_read(ccdc, VPFE_HORZ_INFO));
269 vpfe_dbg(3, vpfe, "VERT_START: 0x%x\n",
270 vpfe_reg_read(ccdc, VPFE_VERT_START));
271 vpfe_dbg(3, vpfe, "VERT_LINES: 0x%x\n",
272 vpfe_reg_read(ccdc, VPFE_VERT_LINES));
273 }
274
275 static int
vpfe_ccdc_validate_param(struct vpfe_ccdc * ccdc,struct vpfe_ccdc_config_params_raw * ccdcparam)276 vpfe_ccdc_validate_param(struct vpfe_ccdc *ccdc,
277 struct vpfe_ccdc_config_params_raw *ccdcparam)
278 {
279 struct vpfe_device *vpfe = to_vpfe(ccdc);
280 u8 max_gamma, max_data;
281
282 if (!ccdcparam->alaw.enable)
283 return 0;
284
285 max_gamma = ccdc_gamma_width_max_bit(ccdcparam->alaw.gamma_wd);
286 max_data = ccdc_data_size_max_bit(ccdcparam->data_sz);
287
288 if (ccdcparam->alaw.gamma_wd > VPFE_CCDC_GAMMA_BITS_09_0 ||
289 ccdcparam->data_sz > VPFE_CCDC_DATA_8BITS ||
290 max_gamma > max_data) {
291 vpfe_dbg(1, vpfe, "Invalid data line select\n");
292 return -EINVAL;
293 }
294
295 return 0;
296 }
297
298 static void
vpfe_ccdc_update_raw_params(struct vpfe_ccdc * ccdc,struct vpfe_ccdc_config_params_raw * raw_params)299 vpfe_ccdc_update_raw_params(struct vpfe_ccdc *ccdc,
300 struct vpfe_ccdc_config_params_raw *raw_params)
301 {
302 struct vpfe_ccdc_config_params_raw *config_params =
303 &ccdc->ccdc_cfg.bayer.config_params;
304
305 *config_params = *raw_params;
306 }
307
308 /*
309 * vpfe_ccdc_restore_defaults()
310 * This function will write defaults to all CCDC registers
311 */
vpfe_ccdc_restore_defaults(struct vpfe_ccdc * ccdc)312 static void vpfe_ccdc_restore_defaults(struct vpfe_ccdc *ccdc)
313 {
314 int i;
315
316 /* Disable CCDC */
317 vpfe_pcr_enable(ccdc, 0);
318
319 /* set all registers to default value */
320 for (i = 4; i <= 0x94; i += 4)
321 vpfe_reg_write(ccdc, 0, i);
322
323 vpfe_reg_write(ccdc, VPFE_NO_CULLING, VPFE_CULLING);
324 vpfe_reg_write(ccdc, VPFE_CCDC_GAMMA_BITS_11_2, VPFE_ALAW);
325 }
326
vpfe_ccdc_close(struct vpfe_ccdc * ccdc,struct device * dev)327 static int vpfe_ccdc_close(struct vpfe_ccdc *ccdc, struct device *dev)
328 {
329 struct vpfe_device *vpfe = to_vpfe(ccdc);
330 u32 dma_cntl, pcr;
331
332 pcr = vpfe_reg_read(ccdc, VPFE_PCR);
333 if (pcr)
334 vpfe_dbg(1, vpfe, "VPFE_PCR is still set (%x)", pcr);
335
336 dma_cntl = vpfe_reg_read(ccdc, VPFE_DMA_CNTL);
337 if ((dma_cntl & VPFE_DMA_CNTL_OVERFLOW))
338 vpfe_dbg(1, vpfe, "VPFE_DMA_CNTL_OVERFLOW is still set (%x)",
339 dma_cntl);
340
341 /* Disable CCDC by resetting all register to default POR values */
342 vpfe_ccdc_restore_defaults(ccdc);
343
344 /* Disabled the module at the CONFIG level */
345 vpfe_config_enable(ccdc, 0);
346
347 pm_runtime_put_sync(dev);
348 return 0;
349 }
350
vpfe_ccdc_set_params(struct vpfe_ccdc * ccdc,void __user * params)351 static int vpfe_ccdc_set_params(struct vpfe_ccdc *ccdc, void __user *params)
352 {
353 struct vpfe_device *vpfe = to_vpfe(ccdc);
354 struct vpfe_ccdc_config_params_raw raw_params;
355 int x;
356
357 if (ccdc->ccdc_cfg.if_type != VPFE_RAW_BAYER)
358 return -EINVAL;
359
360 x = copy_from_user(&raw_params, params, sizeof(raw_params));
361 if (x) {
362 vpfe_dbg(1, vpfe,
363 "%s: error in copying ccdc params, %d\n",
364 __func__, x);
365 return -EFAULT;
366 }
367
368 if (!vpfe_ccdc_validate_param(ccdc, &raw_params)) {
369 vpfe_ccdc_update_raw_params(ccdc, &raw_params);
370 return 0;
371 }
372
373 return -EINVAL;
374 }
375
376 /*
377 * vpfe_ccdc_config_ycbcr()
378 * This function will configure CCDC for YCbCr video capture
379 */
vpfe_ccdc_config_ycbcr(struct vpfe_ccdc * ccdc)380 static void vpfe_ccdc_config_ycbcr(struct vpfe_ccdc *ccdc)
381 {
382 struct ccdc_params_ycbcr *params = &ccdc->ccdc_cfg.ycbcr;
383 u32 syn_mode;
384
385 /*
386 * first restore the CCDC registers to default values
387 * This is important since we assume default values to be set in
388 * a lot of registers that we didn't touch
389 */
390 vpfe_ccdc_restore_defaults(ccdc);
391
392 /*
393 * configure pixel format, frame format, configure video frame
394 * format, enable output to SDRAM, enable internal timing generator
395 * and 8bit pack mode
396 */
397 syn_mode = (((params->pix_fmt & VPFE_SYN_MODE_INPMOD_MASK) <<
398 VPFE_SYN_MODE_INPMOD_SHIFT) |
399 ((params->frm_fmt & VPFE_SYN_FLDMODE_MASK) <<
400 VPFE_SYN_FLDMODE_SHIFT) | VPFE_VDHDEN_ENABLE |
401 VPFE_WEN_ENABLE | VPFE_DATA_PACK_ENABLE);
402
403 /* setup BT.656 sync mode */
404 if (params->bt656_enable) {
405 vpfe_reg_write(ccdc, VPFE_REC656IF_BT656_EN, VPFE_REC656IF);
406
407 /*
408 * configure the FID, VD, HD pin polarity,
409 * fld,hd pol positive, vd negative, 8-bit data
410 */
411 syn_mode |= VPFE_SYN_MODE_VD_POL_NEGATIVE;
412 if (ccdc->ccdc_cfg.if_type == VPFE_BT656_10BIT)
413 syn_mode |= VPFE_SYN_MODE_10BITS;
414 else
415 syn_mode |= VPFE_SYN_MODE_8BITS;
416 } else {
417 /* y/c external sync mode */
418 syn_mode |= (((params->fid_pol & VPFE_FID_POL_MASK) <<
419 VPFE_FID_POL_SHIFT) |
420 ((params->hd_pol & VPFE_HD_POL_MASK) <<
421 VPFE_HD_POL_SHIFT) |
422 ((params->vd_pol & VPFE_VD_POL_MASK) <<
423 VPFE_VD_POL_SHIFT));
424 }
425 vpfe_reg_write(ccdc, syn_mode, VPFE_SYNMODE);
426
427 /* configure video window */
428 vpfe_ccdc_setwin(ccdc, ¶ms->win,
429 params->frm_fmt, params->bytesperpixel);
430
431 /*
432 * configure the order of y cb cr in SDRAM, and disable latch
433 * internal register on vsync
434 */
435 if (ccdc->ccdc_cfg.if_type == VPFE_BT656_10BIT)
436 vpfe_reg_write(ccdc,
437 (params->pix_order << VPFE_CCDCFG_Y8POS_SHIFT) |
438 VPFE_LATCH_ON_VSYNC_DISABLE |
439 VPFE_CCDCFG_BW656_10BIT, VPFE_CCDCFG);
440 else
441 vpfe_reg_write(ccdc,
442 (params->pix_order << VPFE_CCDCFG_Y8POS_SHIFT) |
443 VPFE_LATCH_ON_VSYNC_DISABLE, VPFE_CCDCFG);
444
445 /*
446 * configure the horizontal line offset. This should be a
447 * on 32 byte boundary. So clear LSB 5 bits
448 */
449 vpfe_reg_write(ccdc, params->bytesperline, VPFE_HSIZE_OFF);
450
451 /* configure the memory line offset */
452 if (params->buf_type == CCDC_BUFTYPE_FLD_INTERLEAVED)
453 /* two fields are interleaved in memory */
454 vpfe_reg_write(ccdc, VPFE_SDOFST_FIELD_INTERLEAVED,
455 VPFE_SDOFST);
456 }
457
458 static void
vpfe_ccdc_config_black_clamp(struct vpfe_ccdc * ccdc,struct vpfe_ccdc_black_clamp * bclamp)459 vpfe_ccdc_config_black_clamp(struct vpfe_ccdc *ccdc,
460 struct vpfe_ccdc_black_clamp *bclamp)
461 {
462 u32 val;
463
464 if (!bclamp->enable) {
465 /* configure DCSub */
466 val = (bclamp->dc_sub) & VPFE_BLK_DC_SUB_MASK;
467 vpfe_reg_write(ccdc, val, VPFE_DCSUB);
468 vpfe_reg_write(ccdc, VPFE_CLAMP_DEFAULT_VAL, VPFE_CLAMP);
469 return;
470 }
471 /*
472 * Configure gain, Start pixel, No of line to be avg,
473 * No of pixel/line to be avg, & Enable the Black clamping
474 */
475 val = ((bclamp->sgain & VPFE_BLK_SGAIN_MASK) |
476 ((bclamp->start_pixel & VPFE_BLK_ST_PXL_MASK) <<
477 VPFE_BLK_ST_PXL_SHIFT) |
478 ((bclamp->sample_ln & VPFE_BLK_SAMPLE_LINE_MASK) <<
479 VPFE_BLK_SAMPLE_LINE_SHIFT) |
480 ((bclamp->sample_pixel & VPFE_BLK_SAMPLE_LN_MASK) <<
481 VPFE_BLK_SAMPLE_LN_SHIFT) | VPFE_BLK_CLAMP_ENABLE);
482 vpfe_reg_write(ccdc, val, VPFE_CLAMP);
483 /* If Black clamping is enable then make dcsub 0 */
484 vpfe_reg_write(ccdc, VPFE_DCSUB_DEFAULT_VAL, VPFE_DCSUB);
485 }
486
487 static void
vpfe_ccdc_config_black_compense(struct vpfe_ccdc * ccdc,struct vpfe_ccdc_black_compensation * bcomp)488 vpfe_ccdc_config_black_compense(struct vpfe_ccdc *ccdc,
489 struct vpfe_ccdc_black_compensation *bcomp)
490 {
491 u32 val;
492
493 val = ((bcomp->b & VPFE_BLK_COMP_MASK) |
494 ((bcomp->gb & VPFE_BLK_COMP_MASK) <<
495 VPFE_BLK_COMP_GB_COMP_SHIFT) |
496 ((bcomp->gr & VPFE_BLK_COMP_MASK) <<
497 VPFE_BLK_COMP_GR_COMP_SHIFT) |
498 ((bcomp->r & VPFE_BLK_COMP_MASK) <<
499 VPFE_BLK_COMP_R_COMP_SHIFT));
500 vpfe_reg_write(ccdc, val, VPFE_BLKCMP);
501 }
502
503 /*
504 * vpfe_ccdc_config_raw()
505 * This function will configure CCDC for Raw capture mode
506 */
vpfe_ccdc_config_raw(struct vpfe_ccdc * ccdc)507 static void vpfe_ccdc_config_raw(struct vpfe_ccdc *ccdc)
508 {
509 struct vpfe_device *vpfe = to_vpfe(ccdc);
510 struct vpfe_ccdc_config_params_raw *config_params =
511 &ccdc->ccdc_cfg.bayer.config_params;
512 struct ccdc_params_raw *params = &ccdc->ccdc_cfg.bayer;
513 unsigned int syn_mode;
514 unsigned int val;
515
516 /* Reset CCDC */
517 vpfe_ccdc_restore_defaults(ccdc);
518
519 /* Disable latching function registers on VSYNC */
520 vpfe_reg_write(ccdc, VPFE_LATCH_ON_VSYNC_DISABLE, VPFE_CCDCFG);
521
522 /*
523 * Configure the vertical sync polarity(SYN_MODE.VDPOL),
524 * horizontal sync polarity (SYN_MODE.HDPOL), frame id polarity
525 * (SYN_MODE.FLDPOL), frame format(progressive or interlace),
526 * data size(SYNMODE.DATSIZ), &pixel format (Input mode), output
527 * SDRAM, enable internal timing generator
528 */
529 syn_mode = (((params->vd_pol & VPFE_VD_POL_MASK) << VPFE_VD_POL_SHIFT) |
530 ((params->hd_pol & VPFE_HD_POL_MASK) << VPFE_HD_POL_SHIFT) |
531 ((params->fid_pol & VPFE_FID_POL_MASK) <<
532 VPFE_FID_POL_SHIFT) | ((params->frm_fmt &
533 VPFE_FRM_FMT_MASK) << VPFE_FRM_FMT_SHIFT) |
534 ((config_params->data_sz & VPFE_DATA_SZ_MASK) <<
535 VPFE_DATA_SZ_SHIFT) | ((params->pix_fmt &
536 VPFE_PIX_FMT_MASK) << VPFE_PIX_FMT_SHIFT) |
537 VPFE_WEN_ENABLE | VPFE_VDHDEN_ENABLE);
538
539 /* Enable and configure aLaw register if needed */
540 if (config_params->alaw.enable) {
541 val = ((config_params->alaw.gamma_wd &
542 VPFE_ALAW_GAMMA_WD_MASK) | VPFE_ALAW_ENABLE);
543 vpfe_reg_write(ccdc, val, VPFE_ALAW);
544 vpfe_dbg(3, vpfe, "\nWriting 0x%x to ALAW...\n", val);
545 }
546
547 /* Configure video window */
548 vpfe_ccdc_setwin(ccdc, ¶ms->win, params->frm_fmt,
549 params->bytesperpixel);
550
551 /* Configure Black Clamp */
552 vpfe_ccdc_config_black_clamp(ccdc, &config_params->blk_clamp);
553
554 /* Configure Black level compensation */
555 vpfe_ccdc_config_black_compense(ccdc, &config_params->blk_comp);
556
557 /* If data size is 8 bit then pack the data */
558 if ((config_params->data_sz == VPFE_CCDC_DATA_8BITS) ||
559 config_params->alaw.enable)
560 syn_mode |= VPFE_DATA_PACK_ENABLE;
561
562 /*
563 * Configure Horizontal offset register. If pack 8 is enabled then
564 * 1 pixel will take 1 byte
565 */
566 vpfe_reg_write(ccdc, params->bytesperline, VPFE_HSIZE_OFF);
567
568 vpfe_dbg(3, vpfe, "Writing %d (%x) to HSIZE_OFF\n",
569 params->bytesperline, params->bytesperline);
570
571 /* Set value for SDOFST */
572 if (params->frm_fmt == CCDC_FRMFMT_INTERLACED) {
573 if (params->image_invert_enable) {
574 /* For interlace inverse mode */
575 vpfe_reg_write(ccdc, VPFE_INTERLACED_IMAGE_INVERT,
576 VPFE_SDOFST);
577 } else {
578 /* For interlace non inverse mode */
579 vpfe_reg_write(ccdc, VPFE_INTERLACED_NO_IMAGE_INVERT,
580 VPFE_SDOFST);
581 }
582 } else if (params->frm_fmt == CCDC_FRMFMT_PROGRESSIVE) {
583 vpfe_reg_write(ccdc, VPFE_PROGRESSIVE_NO_IMAGE_INVERT,
584 VPFE_SDOFST);
585 }
586
587 vpfe_reg_write(ccdc, syn_mode, VPFE_SYNMODE);
588
589 vpfe_reg_dump(ccdc);
590 }
591
592 static inline int
vpfe_ccdc_set_buftype(struct vpfe_ccdc * ccdc,enum ccdc_buftype buf_type)593 vpfe_ccdc_set_buftype(struct vpfe_ccdc *ccdc,
594 enum ccdc_buftype buf_type)
595 {
596 if (ccdc->ccdc_cfg.if_type == VPFE_RAW_BAYER)
597 ccdc->ccdc_cfg.bayer.buf_type = buf_type;
598 else
599 ccdc->ccdc_cfg.ycbcr.buf_type = buf_type;
600
601 return 0;
602 }
603
vpfe_ccdc_get_buftype(struct vpfe_ccdc * ccdc)604 static inline enum ccdc_buftype vpfe_ccdc_get_buftype(struct vpfe_ccdc *ccdc)
605 {
606 if (ccdc->ccdc_cfg.if_type == VPFE_RAW_BAYER)
607 return ccdc->ccdc_cfg.bayer.buf_type;
608
609 return ccdc->ccdc_cfg.ycbcr.buf_type;
610 }
611
vpfe_ccdc_set_pixel_format(struct vpfe_ccdc * ccdc,u32 pixfmt)612 static int vpfe_ccdc_set_pixel_format(struct vpfe_ccdc *ccdc, u32 pixfmt)
613 {
614 struct vpfe_device *vpfe = to_vpfe(ccdc);
615
616 vpfe_dbg(1, vpfe, "%s: if_type: %d, pixfmt:%s\n",
617 __func__, ccdc->ccdc_cfg.if_type, print_fourcc(pixfmt));
618
619 if (ccdc->ccdc_cfg.if_type == VPFE_RAW_BAYER) {
620 ccdc->ccdc_cfg.bayer.pix_fmt = CCDC_PIXFMT_RAW;
621 /*
622 * Need to clear it in case it was left on
623 * after the last capture.
624 */
625 ccdc->ccdc_cfg.bayer.config_params.alaw.enable = 0;
626
627 switch (pixfmt) {
628 case V4L2_PIX_FMT_SBGGR8:
629 ccdc->ccdc_cfg.bayer.config_params.alaw.enable = 1;
630 break;
631
632 case V4L2_PIX_FMT_YUYV:
633 case V4L2_PIX_FMT_UYVY:
634 case V4L2_PIX_FMT_YUV420:
635 case V4L2_PIX_FMT_NV12:
636 case V4L2_PIX_FMT_RGB565X:
637 break;
638
639 case V4L2_PIX_FMT_SBGGR16:
640 default:
641 return -EINVAL;
642 }
643 } else {
644 switch (pixfmt) {
645 case V4L2_PIX_FMT_YUYV:
646 ccdc->ccdc_cfg.ycbcr.pix_order = CCDC_PIXORDER_YCBYCR;
647 break;
648
649 case V4L2_PIX_FMT_UYVY:
650 ccdc->ccdc_cfg.ycbcr.pix_order = CCDC_PIXORDER_CBYCRY;
651 break;
652
653 default:
654 return -EINVAL;
655 }
656 }
657
658 return 0;
659 }
660
vpfe_ccdc_get_pixel_format(struct vpfe_ccdc * ccdc)661 static u32 vpfe_ccdc_get_pixel_format(struct vpfe_ccdc *ccdc)
662 {
663 u32 pixfmt;
664
665 if (ccdc->ccdc_cfg.if_type == VPFE_RAW_BAYER) {
666 pixfmt = V4L2_PIX_FMT_YUYV;
667 } else {
668 if (ccdc->ccdc_cfg.ycbcr.pix_order == CCDC_PIXORDER_YCBYCR)
669 pixfmt = V4L2_PIX_FMT_YUYV;
670 else
671 pixfmt = V4L2_PIX_FMT_UYVY;
672 }
673
674 return pixfmt;
675 }
676
677 static int
vpfe_ccdc_set_image_window(struct vpfe_ccdc * ccdc,struct v4l2_rect * win,unsigned int bpp)678 vpfe_ccdc_set_image_window(struct vpfe_ccdc *ccdc,
679 struct v4l2_rect *win, unsigned int bpp)
680 {
681 if (ccdc->ccdc_cfg.if_type == VPFE_RAW_BAYER) {
682 ccdc->ccdc_cfg.bayer.win = *win;
683 ccdc->ccdc_cfg.bayer.bytesperpixel = bpp;
684 ccdc->ccdc_cfg.bayer.bytesperline = ALIGN(win->width * bpp, 32);
685 } else {
686 ccdc->ccdc_cfg.ycbcr.win = *win;
687 ccdc->ccdc_cfg.ycbcr.bytesperpixel = bpp;
688 ccdc->ccdc_cfg.ycbcr.bytesperline = ALIGN(win->width * bpp, 32);
689 }
690
691 return 0;
692 }
693
694 static inline void
vpfe_ccdc_get_image_window(struct vpfe_ccdc * ccdc,struct v4l2_rect * win)695 vpfe_ccdc_get_image_window(struct vpfe_ccdc *ccdc,
696 struct v4l2_rect *win)
697 {
698 if (ccdc->ccdc_cfg.if_type == VPFE_RAW_BAYER)
699 *win = ccdc->ccdc_cfg.bayer.win;
700 else
701 *win = ccdc->ccdc_cfg.ycbcr.win;
702 }
703
vpfe_ccdc_get_line_length(struct vpfe_ccdc * ccdc)704 static inline unsigned int vpfe_ccdc_get_line_length(struct vpfe_ccdc *ccdc)
705 {
706 if (ccdc->ccdc_cfg.if_type == VPFE_RAW_BAYER)
707 return ccdc->ccdc_cfg.bayer.bytesperline;
708
709 return ccdc->ccdc_cfg.ycbcr.bytesperline;
710 }
711
712 static inline int
vpfe_ccdc_set_frame_format(struct vpfe_ccdc * ccdc,enum ccdc_frmfmt frm_fmt)713 vpfe_ccdc_set_frame_format(struct vpfe_ccdc *ccdc,
714 enum ccdc_frmfmt frm_fmt)
715 {
716 if (ccdc->ccdc_cfg.if_type == VPFE_RAW_BAYER)
717 ccdc->ccdc_cfg.bayer.frm_fmt = frm_fmt;
718 else
719 ccdc->ccdc_cfg.ycbcr.frm_fmt = frm_fmt;
720
721 return 0;
722 }
723
724 static inline enum ccdc_frmfmt
vpfe_ccdc_get_frame_format(struct vpfe_ccdc * ccdc)725 vpfe_ccdc_get_frame_format(struct vpfe_ccdc *ccdc)
726 {
727 if (ccdc->ccdc_cfg.if_type == VPFE_RAW_BAYER)
728 return ccdc->ccdc_cfg.bayer.frm_fmt;
729
730 return ccdc->ccdc_cfg.ycbcr.frm_fmt;
731 }
732
vpfe_ccdc_getfid(struct vpfe_ccdc * ccdc)733 static inline int vpfe_ccdc_getfid(struct vpfe_ccdc *ccdc)
734 {
735 return (vpfe_reg_read(ccdc, VPFE_SYNMODE) >> 15) & 1;
736 }
737
vpfe_set_sdr_addr(struct vpfe_ccdc * ccdc,unsigned long addr)738 static inline void vpfe_set_sdr_addr(struct vpfe_ccdc *ccdc, unsigned long addr)
739 {
740 vpfe_reg_write(ccdc, addr & 0xffffffe0, VPFE_SDR_ADDR);
741 }
742
vpfe_ccdc_set_hw_if_params(struct vpfe_ccdc * ccdc,struct vpfe_hw_if_param * params)743 static int vpfe_ccdc_set_hw_if_params(struct vpfe_ccdc *ccdc,
744 struct vpfe_hw_if_param *params)
745 {
746 struct vpfe_device *vpfe = to_vpfe(ccdc);
747
748 ccdc->ccdc_cfg.if_type = params->if_type;
749
750 switch (params->if_type) {
751 case VPFE_BT656:
752 case VPFE_YCBCR_SYNC_16:
753 case VPFE_YCBCR_SYNC_8:
754 case VPFE_BT656_10BIT:
755 ccdc->ccdc_cfg.ycbcr.vd_pol = params->vdpol;
756 ccdc->ccdc_cfg.ycbcr.hd_pol = params->hdpol;
757 break;
758
759 case VPFE_RAW_BAYER:
760 ccdc->ccdc_cfg.bayer.vd_pol = params->vdpol;
761 ccdc->ccdc_cfg.bayer.hd_pol = params->hdpol;
762 if (params->bus_width == 10)
763 ccdc->ccdc_cfg.bayer.config_params.data_sz =
764 VPFE_CCDC_DATA_10BITS;
765 else
766 ccdc->ccdc_cfg.bayer.config_params.data_sz =
767 VPFE_CCDC_DATA_8BITS;
768 vpfe_dbg(1, vpfe, "params.bus_width: %d\n",
769 params->bus_width);
770 vpfe_dbg(1, vpfe, "config_params.data_sz: %d\n",
771 ccdc->ccdc_cfg.bayer.config_params.data_sz);
772 break;
773
774 default:
775 return -EINVAL;
776 }
777
778 return 0;
779 }
780
vpfe_clear_intr(struct vpfe_ccdc * ccdc,int vdint)781 static void vpfe_clear_intr(struct vpfe_ccdc *ccdc, int vdint)
782 {
783 unsigned int vpfe_int_status;
784
785 vpfe_int_status = vpfe_reg_read(ccdc, VPFE_IRQ_STS);
786
787 switch (vdint) {
788 /* VD0 interrupt */
789 case VPFE_VDINT0:
790 vpfe_int_status &= ~VPFE_VDINT0;
791 vpfe_int_status |= VPFE_VDINT0;
792 break;
793
794 /* VD1 interrupt */
795 case VPFE_VDINT1:
796 vpfe_int_status &= ~VPFE_VDINT1;
797 vpfe_int_status |= VPFE_VDINT1;
798 break;
799
800 /* VD2 interrupt */
801 case VPFE_VDINT2:
802 vpfe_int_status &= ~VPFE_VDINT2;
803 vpfe_int_status |= VPFE_VDINT2;
804 break;
805
806 /* Clear all interrupts */
807 default:
808 vpfe_int_status &= ~(VPFE_VDINT0 |
809 VPFE_VDINT1 |
810 VPFE_VDINT2);
811 vpfe_int_status |= (VPFE_VDINT0 |
812 VPFE_VDINT1 |
813 VPFE_VDINT2);
814 break;
815 }
816 /* Clear specific VDINT from the status register */
817 vpfe_reg_write(ccdc, vpfe_int_status, VPFE_IRQ_STS);
818
819 vpfe_int_status = vpfe_reg_read(ccdc, VPFE_IRQ_STS);
820
821 /* Acknowledge that we are done with all interrupts */
822 vpfe_reg_write(ccdc, 1, VPFE_IRQ_EOI);
823 }
824
vpfe_ccdc_config_defaults(struct vpfe_ccdc * ccdc)825 static void vpfe_ccdc_config_defaults(struct vpfe_ccdc *ccdc)
826 {
827 ccdc->ccdc_cfg.if_type = VPFE_RAW_BAYER;
828
829 ccdc->ccdc_cfg.ycbcr.pix_fmt = CCDC_PIXFMT_YCBCR_8BIT;
830 ccdc->ccdc_cfg.ycbcr.frm_fmt = CCDC_FRMFMT_INTERLACED;
831 ccdc->ccdc_cfg.ycbcr.fid_pol = VPFE_PINPOL_POSITIVE;
832 ccdc->ccdc_cfg.ycbcr.vd_pol = VPFE_PINPOL_POSITIVE;
833 ccdc->ccdc_cfg.ycbcr.hd_pol = VPFE_PINPOL_POSITIVE;
834 ccdc->ccdc_cfg.ycbcr.pix_order = CCDC_PIXORDER_CBYCRY;
835 ccdc->ccdc_cfg.ycbcr.buf_type = CCDC_BUFTYPE_FLD_INTERLEAVED;
836
837 ccdc->ccdc_cfg.ycbcr.win.left = 0;
838 ccdc->ccdc_cfg.ycbcr.win.top = 0;
839 ccdc->ccdc_cfg.ycbcr.win.width = 720;
840 ccdc->ccdc_cfg.ycbcr.win.height = 576;
841 ccdc->ccdc_cfg.ycbcr.bt656_enable = 1;
842
843 ccdc->ccdc_cfg.bayer.pix_fmt = CCDC_PIXFMT_RAW;
844 ccdc->ccdc_cfg.bayer.frm_fmt = CCDC_FRMFMT_PROGRESSIVE;
845 ccdc->ccdc_cfg.bayer.fid_pol = VPFE_PINPOL_POSITIVE;
846 ccdc->ccdc_cfg.bayer.vd_pol = VPFE_PINPOL_POSITIVE;
847 ccdc->ccdc_cfg.bayer.hd_pol = VPFE_PINPOL_POSITIVE;
848
849 ccdc->ccdc_cfg.bayer.win.left = 0;
850 ccdc->ccdc_cfg.bayer.win.top = 0;
851 ccdc->ccdc_cfg.bayer.win.width = 800;
852 ccdc->ccdc_cfg.bayer.win.height = 600;
853 ccdc->ccdc_cfg.bayer.config_params.data_sz = VPFE_CCDC_DATA_8BITS;
854 ccdc->ccdc_cfg.bayer.config_params.alaw.gamma_wd =
855 VPFE_CCDC_GAMMA_BITS_09_0;
856 }
857
858 /*
859 * vpfe_get_ccdc_image_format - Get image parameters based on CCDC settings
860 */
vpfe_get_ccdc_image_format(struct vpfe_device * vpfe,struct v4l2_format * f)861 static int vpfe_get_ccdc_image_format(struct vpfe_device *vpfe,
862 struct v4l2_format *f)
863 {
864 struct v4l2_rect image_win;
865 enum ccdc_buftype buf_type;
866 enum ccdc_frmfmt frm_fmt;
867
868 memset(f, 0, sizeof(*f));
869 f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
870 vpfe_ccdc_get_image_window(&vpfe->ccdc, &image_win);
871 f->fmt.pix.width = image_win.width;
872 f->fmt.pix.height = image_win.height;
873 f->fmt.pix.bytesperline = vpfe_ccdc_get_line_length(&vpfe->ccdc);
874 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline *
875 f->fmt.pix.height;
876 buf_type = vpfe_ccdc_get_buftype(&vpfe->ccdc);
877 f->fmt.pix.pixelformat = vpfe_ccdc_get_pixel_format(&vpfe->ccdc);
878 frm_fmt = vpfe_ccdc_get_frame_format(&vpfe->ccdc);
879
880 if (frm_fmt == CCDC_FRMFMT_PROGRESSIVE) {
881 f->fmt.pix.field = V4L2_FIELD_NONE;
882 } else if (frm_fmt == CCDC_FRMFMT_INTERLACED) {
883 if (buf_type == CCDC_BUFTYPE_FLD_INTERLEAVED) {
884 f->fmt.pix.field = V4L2_FIELD_INTERLACED;
885 } else if (buf_type == CCDC_BUFTYPE_FLD_SEPARATED) {
886 f->fmt.pix.field = V4L2_FIELD_SEQ_TB;
887 } else {
888 vpfe_err(vpfe, "Invalid buf_type\n");
889 return -EINVAL;
890 }
891 } else {
892 vpfe_err(vpfe, "Invalid frm_fmt\n");
893 return -EINVAL;
894 }
895 return 0;
896 }
897
vpfe_config_ccdc_image_format(struct vpfe_device * vpfe)898 static int vpfe_config_ccdc_image_format(struct vpfe_device *vpfe)
899 {
900 enum ccdc_frmfmt frm_fmt = CCDC_FRMFMT_INTERLACED;
901 u32 bpp;
902 int ret = 0;
903
904 vpfe_dbg(1, vpfe, "pixelformat: %s\n",
905 print_fourcc(vpfe->fmt.fmt.pix.pixelformat));
906
907 if (vpfe_ccdc_set_pixel_format(&vpfe->ccdc,
908 vpfe->fmt.fmt.pix.pixelformat) < 0) {
909 vpfe_err(vpfe, "couldn't set pix format in ccdc\n");
910 return -EINVAL;
911 }
912
913 /* configure the image window */
914 bpp = __get_bytesperpixel(vpfe, vpfe->current_vpfe_fmt);
915 vpfe_ccdc_set_image_window(&vpfe->ccdc, &vpfe->crop, bpp);
916
917 switch (vpfe->fmt.fmt.pix.field) {
918 case V4L2_FIELD_INTERLACED:
919 /* do nothing, since it is default */
920 ret = vpfe_ccdc_set_buftype(
921 &vpfe->ccdc,
922 CCDC_BUFTYPE_FLD_INTERLEAVED);
923 break;
924
925 case V4L2_FIELD_NONE:
926 frm_fmt = CCDC_FRMFMT_PROGRESSIVE;
927 /* buffer type only applicable for interlaced scan */
928 break;
929
930 case V4L2_FIELD_SEQ_TB:
931 ret = vpfe_ccdc_set_buftype(
932 &vpfe->ccdc,
933 CCDC_BUFTYPE_FLD_SEPARATED);
934 break;
935
936 default:
937 return -EINVAL;
938 }
939
940 if (ret)
941 return ret;
942
943 return vpfe_ccdc_set_frame_format(&vpfe->ccdc, frm_fmt);
944 }
945
946 /*
947 * vpfe_config_image_format()
948 * For a given standard, this functions sets up the default
949 * pix format & crop values in the vpfe device and ccdc. It first
950 * starts with defaults based values from the standard table.
951 * It then checks if sub device supports get_fmt and then override the
952 * values based on that.Sets crop values to match with scan resolution
953 * starting at 0,0. It calls vpfe_config_ccdc_image_format() set the
954 * values in ccdc
955 */
vpfe_config_image_format(struct vpfe_device * vpfe,v4l2_std_id std_id)956 static int vpfe_config_image_format(struct vpfe_device *vpfe,
957 v4l2_std_id std_id)
958 {
959 struct vpfe_fmt *fmt;
960 struct v4l2_mbus_framefmt mbus_fmt;
961 int i, ret;
962
963 for (i = 0; i < ARRAY_SIZE(vpfe_standards); i++) {
964 if (vpfe_standards[i].std_id & std_id) {
965 vpfe->std_info.active_pixels =
966 vpfe_standards[i].width;
967 vpfe->std_info.active_lines =
968 vpfe_standards[i].height;
969 vpfe->std_info.frame_format =
970 vpfe_standards[i].frame_format;
971 vpfe->std_index = i;
972
973 break;
974 }
975 }
976
977 if (i == ARRAY_SIZE(vpfe_standards)) {
978 vpfe_err(vpfe, "standard not supported\n");
979 return -EINVAL;
980 }
981
982 ret = __subdev_get_format(vpfe, &mbus_fmt);
983 if (ret)
984 return ret;
985
986 fmt = find_format_by_code(vpfe, mbus_fmt.code);
987 if (!fmt) {
988 vpfe_dbg(3, vpfe, "mbus code format (0x%08x) not found.\n",
989 mbus_fmt.code);
990 return -EINVAL;
991 }
992
993 /* Save current subdev format */
994 v4l2_fill_pix_format(&vpfe->fmt.fmt.pix, &mbus_fmt);
995 vpfe->fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
996 vpfe->fmt.fmt.pix.pixelformat = fmt->fourcc;
997 vpfe_calc_format_size(vpfe, fmt, &vpfe->fmt);
998 vpfe->current_vpfe_fmt = fmt;
999
1000 /* Update the crop window based on found values */
1001 vpfe->crop.top = 0;
1002 vpfe->crop.left = 0;
1003 vpfe->crop.width = mbus_fmt.width;
1004 vpfe->crop.height = mbus_fmt.height;
1005
1006 return vpfe_config_ccdc_image_format(vpfe);
1007 }
1008
vpfe_initialize_device(struct vpfe_device * vpfe)1009 static int vpfe_initialize_device(struct vpfe_device *vpfe)
1010 {
1011 struct vpfe_subdev_info *sdinfo;
1012 int ret;
1013
1014 sdinfo = &vpfe->cfg->sub_devs[0];
1015 sdinfo->sd = vpfe->sd[0];
1016 vpfe->current_input = 0;
1017 vpfe->std_index = 0;
1018 /* Configure the default format information */
1019 ret = vpfe_config_image_format(vpfe,
1020 vpfe_standards[vpfe->std_index].std_id);
1021 if (ret)
1022 return ret;
1023
1024 ret = pm_runtime_resume_and_get(vpfe->pdev);
1025 if (ret < 0)
1026 return ret;
1027
1028 vpfe_config_enable(&vpfe->ccdc, 1);
1029
1030 vpfe_ccdc_restore_defaults(&vpfe->ccdc);
1031
1032 /* Clear all VPFE interrupts */
1033 vpfe_clear_intr(&vpfe->ccdc, -1);
1034
1035 return ret;
1036 }
1037
1038 /*
1039 * vpfe_release : This function is based on the vb2_fop_release
1040 * helper function.
1041 * It has been augmented to handle module power management,
1042 * by disabling/enabling h/w module fcntl clock when necessary.
1043 */
vpfe_release(struct file * file)1044 static int vpfe_release(struct file *file)
1045 {
1046 struct vpfe_device *vpfe = video_drvdata(file);
1047 bool fh_singular;
1048 int ret;
1049
1050 mutex_lock(&vpfe->lock);
1051
1052 /* Save the singular status before we call the clean-up helper */
1053 fh_singular = v4l2_fh_is_singular_file(file);
1054
1055 /* the release helper will cleanup any on-going streaming */
1056 ret = _vb2_fop_release(file, NULL);
1057
1058 /*
1059 * If this was the last open file.
1060 * Then de-initialize hw module.
1061 */
1062 if (fh_singular)
1063 vpfe_ccdc_close(&vpfe->ccdc, vpfe->pdev);
1064
1065 mutex_unlock(&vpfe->lock);
1066
1067 return ret;
1068 }
1069
1070 /*
1071 * vpfe_open : This function is based on the v4l2_fh_open helper function.
1072 * It has been augmented to handle module power management,
1073 * by disabling/enabling h/w module fcntl clock when necessary.
1074 */
vpfe_open(struct file * file)1075 static int vpfe_open(struct file *file)
1076 {
1077 struct vpfe_device *vpfe = video_drvdata(file);
1078 int ret;
1079
1080 mutex_lock(&vpfe->lock);
1081
1082 ret = v4l2_fh_open(file);
1083 if (ret) {
1084 vpfe_err(vpfe, "v4l2_fh_open failed\n");
1085 goto unlock;
1086 }
1087
1088 if (!v4l2_fh_is_singular_file(file))
1089 goto unlock;
1090
1091 if (vpfe_initialize_device(vpfe)) {
1092 v4l2_fh_release(file);
1093 ret = -ENODEV;
1094 }
1095
1096 unlock:
1097 mutex_unlock(&vpfe->lock);
1098 return ret;
1099 }
1100
1101 /**
1102 * vpfe_schedule_next_buffer: set next buffer address for capture
1103 * @vpfe : ptr to vpfe device
1104 *
1105 * This function will get next buffer from the dma queue and
1106 * set the buffer address in the vpfe register for capture.
1107 * the buffer is marked active
1108 */
vpfe_schedule_next_buffer(struct vpfe_device * vpfe)1109 static void vpfe_schedule_next_buffer(struct vpfe_device *vpfe)
1110 {
1111 dma_addr_t addr;
1112
1113 spin_lock(&vpfe->dma_queue_lock);
1114 if (list_empty(&vpfe->dma_queue)) {
1115 spin_unlock(&vpfe->dma_queue_lock);
1116 return;
1117 }
1118
1119 vpfe->next_frm = list_entry(vpfe->dma_queue.next,
1120 struct vpfe_cap_buffer, list);
1121 list_del(&vpfe->next_frm->list);
1122 spin_unlock(&vpfe->dma_queue_lock);
1123
1124 addr = vb2_dma_contig_plane_dma_addr(&vpfe->next_frm->vb.vb2_buf, 0);
1125 vpfe_set_sdr_addr(&vpfe->ccdc, addr);
1126 }
1127
vpfe_schedule_bottom_field(struct vpfe_device * vpfe)1128 static inline void vpfe_schedule_bottom_field(struct vpfe_device *vpfe)
1129 {
1130 dma_addr_t addr;
1131
1132 addr = vb2_dma_contig_plane_dma_addr(&vpfe->next_frm->vb.vb2_buf, 0) +
1133 vpfe->field_off;
1134
1135 vpfe_set_sdr_addr(&vpfe->ccdc, addr);
1136 }
1137
1138 /*
1139 * vpfe_process_buffer_complete: process a completed buffer
1140 * @vpfe : ptr to vpfe device
1141 *
1142 * This function time stamp the buffer and mark it as DONE. It also
1143 * wake up any process waiting on the QUEUE and set the next buffer
1144 * as current
1145 */
vpfe_process_buffer_complete(struct vpfe_device * vpfe)1146 static inline void vpfe_process_buffer_complete(struct vpfe_device *vpfe)
1147 {
1148 vpfe->cur_frm->vb.vb2_buf.timestamp = ktime_get_ns();
1149 vpfe->cur_frm->vb.field = vpfe->fmt.fmt.pix.field;
1150 vpfe->cur_frm->vb.sequence = vpfe->sequence++;
1151 vb2_buffer_done(&vpfe->cur_frm->vb.vb2_buf, VB2_BUF_STATE_DONE);
1152 vpfe->cur_frm = vpfe->next_frm;
1153 }
1154
vpfe_handle_interlaced_irq(struct vpfe_device * vpfe,enum v4l2_field field)1155 static void vpfe_handle_interlaced_irq(struct vpfe_device *vpfe,
1156 enum v4l2_field field)
1157 {
1158 int fid;
1159
1160 /* interlaced or TB capture check which field
1161 * we are in hardware
1162 */
1163 fid = vpfe_ccdc_getfid(&vpfe->ccdc);
1164
1165 /* switch the software maintained field id */
1166 vpfe->field ^= 1;
1167 if (fid == vpfe->field) {
1168 /* we are in-sync here,continue */
1169 if (fid == 0) {
1170 /*
1171 * One frame is just being captured. If the
1172 * next frame is available, release the
1173 * current frame and move on
1174 */
1175 if (vpfe->cur_frm != vpfe->next_frm)
1176 vpfe_process_buffer_complete(vpfe);
1177
1178 if (vpfe->stopping)
1179 return;
1180
1181 /*
1182 * based on whether the two fields are stored
1183 * interleave or separately in memory,
1184 * reconfigure the CCDC memory address
1185 */
1186 if (field == V4L2_FIELD_SEQ_TB)
1187 vpfe_schedule_bottom_field(vpfe);
1188 } else {
1189 /*
1190 * if one field is just being captured configure
1191 * the next frame get the next frame from the empty
1192 * queue if no frame is available hold on to the
1193 * current buffer
1194 */
1195 if (vpfe->cur_frm == vpfe->next_frm)
1196 vpfe_schedule_next_buffer(vpfe);
1197 }
1198 } else if (fid == 0) {
1199 /*
1200 * out of sync. Recover from any hardware out-of-sync.
1201 * May loose one frame
1202 */
1203 vpfe->field = fid;
1204 }
1205 }
1206
1207 /*
1208 * vpfe_isr : ISR handler for vpfe capture (VINT0)
1209 * @irq: irq number
1210 * @dev_id: dev_id ptr
1211 *
1212 * It changes status of the captured buffer, takes next buffer from the queue
1213 * and sets its address in VPFE registers
1214 */
vpfe_isr(int irq,void * dev)1215 static irqreturn_t vpfe_isr(int irq, void *dev)
1216 {
1217 struct vpfe_device *vpfe = (struct vpfe_device *)dev;
1218 enum v4l2_field field = vpfe->fmt.fmt.pix.field;
1219 int intr_status, stopping = vpfe->stopping;
1220
1221 intr_status = vpfe_reg_read(&vpfe->ccdc, VPFE_IRQ_STS);
1222
1223 if (intr_status & VPFE_VDINT0) {
1224 if (field == V4L2_FIELD_NONE) {
1225 if (vpfe->cur_frm != vpfe->next_frm)
1226 vpfe_process_buffer_complete(vpfe);
1227 } else {
1228 vpfe_handle_interlaced_irq(vpfe, field);
1229 }
1230 if (stopping) {
1231 vpfe->stopping = false;
1232 complete(&vpfe->capture_stop);
1233 }
1234 }
1235
1236 if (intr_status & VPFE_VDINT1 && !stopping) {
1237 if (field == V4L2_FIELD_NONE &&
1238 vpfe->cur_frm == vpfe->next_frm)
1239 vpfe_schedule_next_buffer(vpfe);
1240 }
1241
1242 vpfe_clear_intr(&vpfe->ccdc, intr_status);
1243
1244 return IRQ_HANDLED;
1245 }
1246
vpfe_detach_irq(struct vpfe_device * vpfe)1247 static inline void vpfe_detach_irq(struct vpfe_device *vpfe)
1248 {
1249 unsigned int intr = VPFE_VDINT0;
1250 enum ccdc_frmfmt frame_format;
1251
1252 frame_format = vpfe_ccdc_get_frame_format(&vpfe->ccdc);
1253 if (frame_format == CCDC_FRMFMT_PROGRESSIVE)
1254 intr |= VPFE_VDINT1;
1255
1256 vpfe_reg_write(&vpfe->ccdc, intr, VPFE_IRQ_EN_CLR);
1257 }
1258
vpfe_attach_irq(struct vpfe_device * vpfe)1259 static inline void vpfe_attach_irq(struct vpfe_device *vpfe)
1260 {
1261 unsigned int intr = VPFE_VDINT0;
1262 enum ccdc_frmfmt frame_format;
1263
1264 frame_format = vpfe_ccdc_get_frame_format(&vpfe->ccdc);
1265 if (frame_format == CCDC_FRMFMT_PROGRESSIVE)
1266 intr |= VPFE_VDINT1;
1267
1268 vpfe_reg_write(&vpfe->ccdc, intr, VPFE_IRQ_EN_SET);
1269 }
1270
vpfe_querycap(struct file * file,void * priv,struct v4l2_capability * cap)1271 static int vpfe_querycap(struct file *file, void *priv,
1272 struct v4l2_capability *cap)
1273 {
1274 struct vpfe_device *vpfe = video_drvdata(file);
1275
1276 strscpy(cap->driver, VPFE_MODULE_NAME, sizeof(cap->driver));
1277 strscpy(cap->card, "TI AM437x VPFE", sizeof(cap->card));
1278 snprintf(cap->bus_info, sizeof(cap->bus_info),
1279 "platform:%s", vpfe->v4l2_dev.name);
1280 return 0;
1281 }
1282
1283 /* get the format set at output pad of the adjacent subdev */
__subdev_get_format(struct vpfe_device * vpfe,struct v4l2_mbus_framefmt * fmt)1284 static int __subdev_get_format(struct vpfe_device *vpfe,
1285 struct v4l2_mbus_framefmt *fmt)
1286 {
1287 struct v4l2_subdev *sd = vpfe->current_subdev->sd;
1288 struct v4l2_subdev_format sd_fmt = {
1289 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
1290 .pad = 0,
1291 };
1292 struct v4l2_mbus_framefmt *mbus_fmt = &sd_fmt.format;
1293 int ret;
1294
1295 ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &sd_fmt);
1296 if (ret)
1297 return ret;
1298
1299 *fmt = *mbus_fmt;
1300
1301 vpfe_dbg(1, vpfe, "%s: %dx%d code:%04X\n", __func__,
1302 fmt->width, fmt->height, fmt->code);
1303
1304 return 0;
1305 }
1306
1307 /* set the format at output pad of the adjacent subdev */
__subdev_set_format(struct vpfe_device * vpfe,struct v4l2_mbus_framefmt * fmt)1308 static int __subdev_set_format(struct vpfe_device *vpfe,
1309 struct v4l2_mbus_framefmt *fmt)
1310 {
1311 struct v4l2_subdev *sd = vpfe->current_subdev->sd;
1312 struct v4l2_subdev_format sd_fmt = {
1313 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
1314 .pad = 0,
1315 };
1316 struct v4l2_mbus_framefmt *mbus_fmt = &sd_fmt.format;
1317 int ret;
1318
1319 *mbus_fmt = *fmt;
1320
1321 ret = v4l2_subdev_call(sd, pad, set_fmt, NULL, &sd_fmt);
1322 if (ret)
1323 return ret;
1324
1325 vpfe_dbg(1, vpfe, "%s %dx%d code:%04X\n", __func__,
1326 fmt->width, fmt->height, fmt->code);
1327
1328 return 0;
1329 }
1330
vpfe_calc_format_size(struct vpfe_device * vpfe,const struct vpfe_fmt * fmt,struct v4l2_format * f)1331 static int vpfe_calc_format_size(struct vpfe_device *vpfe,
1332 const struct vpfe_fmt *fmt,
1333 struct v4l2_format *f)
1334 {
1335 u32 bpp;
1336
1337 if (!fmt) {
1338 vpfe_dbg(3, vpfe, "No vpfe_fmt provided!\n");
1339 return -EINVAL;
1340 }
1341
1342 bpp = __get_bytesperpixel(vpfe, fmt);
1343
1344 /* pitch should be 32 bytes aligned */
1345 f->fmt.pix.bytesperline = ALIGN(f->fmt.pix.width * bpp, 32);
1346 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline *
1347 f->fmt.pix.height;
1348
1349 vpfe_dbg(3, vpfe, "%s: fourcc: %s size: %dx%d bpl:%d img_size:%d\n",
1350 __func__, print_fourcc(f->fmt.pix.pixelformat),
1351 f->fmt.pix.width, f->fmt.pix.height,
1352 f->fmt.pix.bytesperline, f->fmt.pix.sizeimage);
1353
1354 return 0;
1355 }
1356
vpfe_g_fmt(struct file * file,void * priv,struct v4l2_format * fmt)1357 static int vpfe_g_fmt(struct file *file, void *priv,
1358 struct v4l2_format *fmt)
1359 {
1360 struct vpfe_device *vpfe = video_drvdata(file);
1361
1362 *fmt = vpfe->fmt;
1363
1364 return 0;
1365 }
1366
vpfe_enum_fmt(struct file * file,void * priv,struct v4l2_fmtdesc * f)1367 static int vpfe_enum_fmt(struct file *file, void *priv,
1368 struct v4l2_fmtdesc *f)
1369 {
1370 struct vpfe_device *vpfe = video_drvdata(file);
1371 struct vpfe_subdev_info *sdinfo;
1372 struct vpfe_fmt *fmt;
1373
1374 sdinfo = vpfe->current_subdev;
1375 if (!sdinfo->sd)
1376 return -EINVAL;
1377
1378 if (f->index >= vpfe->num_active_fmt)
1379 return -EINVAL;
1380
1381 fmt = vpfe->active_fmt[f->index];
1382
1383 f->pixelformat = fmt->fourcc;
1384
1385 vpfe_dbg(1, vpfe, "%s: mbus index: %d code: %x pixelformat: %s\n",
1386 __func__, f->index, fmt->code, print_fourcc(fmt->fourcc));
1387
1388 return 0;
1389 }
1390
vpfe_try_fmt(struct file * file,void * priv,struct v4l2_format * f)1391 static int vpfe_try_fmt(struct file *file, void *priv,
1392 struct v4l2_format *f)
1393 {
1394 struct vpfe_device *vpfe = video_drvdata(file);
1395 struct v4l2_subdev *sd = vpfe->current_subdev->sd;
1396 const struct vpfe_fmt *fmt;
1397 struct v4l2_subdev_frame_size_enum fse = {
1398 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
1399 };
1400 int ret, found;
1401
1402 fmt = find_format_by_pix(vpfe, f->fmt.pix.pixelformat);
1403 if (!fmt) {
1404 /* default to first entry */
1405 vpfe_dbg(3, vpfe, "Invalid pixel code: %x, default used instead\n",
1406 f->fmt.pix.pixelformat);
1407 fmt = vpfe->active_fmt[0];
1408 f->fmt.pix.pixelformat = fmt->fourcc;
1409 }
1410
1411 f->fmt.pix.field = vpfe->fmt.fmt.pix.field;
1412
1413 /* check for/find a valid width/height */
1414 ret = 0;
1415 found = false;
1416 fse.pad = 0;
1417 fse.code = fmt->code;
1418 for (fse.index = 0; ; fse.index++) {
1419 ret = v4l2_subdev_call(sd, pad, enum_frame_size,
1420 NULL, &fse);
1421 if (ret)
1422 break;
1423
1424 if (f->fmt.pix.width == fse.max_width &&
1425 f->fmt.pix.height == fse.max_height) {
1426 found = true;
1427 break;
1428 } else if (f->fmt.pix.width >= fse.min_width &&
1429 f->fmt.pix.width <= fse.max_width &&
1430 f->fmt.pix.height >= fse.min_height &&
1431 f->fmt.pix.height <= fse.max_height) {
1432 found = true;
1433 break;
1434 }
1435 }
1436
1437 if (!found) {
1438 /* use existing values as default */
1439 f->fmt.pix.width = vpfe->fmt.fmt.pix.width;
1440 f->fmt.pix.height = vpfe->fmt.fmt.pix.height;
1441 }
1442
1443 /*
1444 * Use current colorspace for now, it will get
1445 * updated properly during s_fmt
1446 */
1447 f->fmt.pix.colorspace = vpfe->fmt.fmt.pix.colorspace;
1448 return vpfe_calc_format_size(vpfe, fmt, f);
1449 }
1450
vpfe_s_fmt(struct file * file,void * priv,struct v4l2_format * fmt)1451 static int vpfe_s_fmt(struct file *file, void *priv,
1452 struct v4l2_format *fmt)
1453 {
1454 struct vpfe_device *vpfe = video_drvdata(file);
1455 struct vpfe_fmt *f;
1456 struct v4l2_mbus_framefmt mbus_fmt;
1457 int ret;
1458
1459 /* If streaming is started, return error */
1460 if (vb2_is_busy(&vpfe->buffer_queue)) {
1461 vpfe_err(vpfe, "%s device busy\n", __func__);
1462 return -EBUSY;
1463 }
1464
1465 ret = vpfe_try_fmt(file, priv, fmt);
1466 if (ret < 0)
1467 return ret;
1468
1469 f = find_format_by_pix(vpfe, fmt->fmt.pix.pixelformat);
1470
1471 v4l2_fill_mbus_format(&mbus_fmt, &fmt->fmt.pix, f->code);
1472
1473 ret = __subdev_set_format(vpfe, &mbus_fmt);
1474 if (ret)
1475 return ret;
1476
1477 /* Just double check nothing has gone wrong */
1478 if (mbus_fmt.code != f->code) {
1479 vpfe_dbg(3, vpfe,
1480 "%s subdev changed format on us, this should not happen\n",
1481 __func__);
1482 return -EINVAL;
1483 }
1484
1485 v4l2_fill_pix_format(&vpfe->fmt.fmt.pix, &mbus_fmt);
1486 vpfe->fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1487 vpfe->fmt.fmt.pix.pixelformat = f->fourcc;
1488 vpfe_calc_format_size(vpfe, f, &vpfe->fmt);
1489 *fmt = vpfe->fmt;
1490 vpfe->current_vpfe_fmt = f;
1491
1492 /* Update the crop window based on found values */
1493 vpfe->crop.width = fmt->fmt.pix.width;
1494 vpfe->crop.height = fmt->fmt.pix.height;
1495
1496 /* set image capture parameters in the ccdc */
1497 return vpfe_config_ccdc_image_format(vpfe);
1498 }
1499
vpfe_enum_size(struct file * file,void * priv,struct v4l2_frmsizeenum * fsize)1500 static int vpfe_enum_size(struct file *file, void *priv,
1501 struct v4l2_frmsizeenum *fsize)
1502 {
1503 struct vpfe_device *vpfe = video_drvdata(file);
1504 struct v4l2_subdev_frame_size_enum fse = {
1505 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
1506 };
1507 struct v4l2_subdev *sd = vpfe->current_subdev->sd;
1508 struct vpfe_fmt *fmt;
1509 int ret;
1510
1511 /* check for valid format */
1512 fmt = find_format_by_pix(vpfe, fsize->pixel_format);
1513 if (!fmt) {
1514 vpfe_dbg(3, vpfe, "Invalid pixel code: %x\n",
1515 fsize->pixel_format);
1516 return -EINVAL;
1517 }
1518
1519 memset(fsize->reserved, 0x0, sizeof(fsize->reserved));
1520
1521 fse.index = fsize->index;
1522 fse.pad = 0;
1523 fse.code = fmt->code;
1524 ret = v4l2_subdev_call(sd, pad, enum_frame_size, NULL, &fse);
1525 if (ret)
1526 return ret;
1527
1528 vpfe_dbg(1, vpfe, "%s: index: %d code: %x W:[%d,%d] H:[%d,%d]\n",
1529 __func__, fse.index, fse.code, fse.min_width, fse.max_width,
1530 fse.min_height, fse.max_height);
1531
1532 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1533 fsize->discrete.width = fse.max_width;
1534 fsize->discrete.height = fse.max_height;
1535
1536 vpfe_dbg(1, vpfe, "%s: index: %d pixformat: %s size: %dx%d\n",
1537 __func__, fsize->index, print_fourcc(fsize->pixel_format),
1538 fsize->discrete.width, fsize->discrete.height);
1539
1540 return 0;
1541 }
1542
1543 /*
1544 * vpfe_get_subdev_input_index - Get subdev index and subdev input index for a
1545 * given app input index
1546 */
1547 static int
vpfe_get_subdev_input_index(struct vpfe_device * vpfe,int * subdev_index,int * subdev_input_index,int app_input_index)1548 vpfe_get_subdev_input_index(struct vpfe_device *vpfe,
1549 int *subdev_index,
1550 int *subdev_input_index,
1551 int app_input_index)
1552 {
1553 int i, j = 0;
1554
1555 for (i = 0; i < ARRAY_SIZE(vpfe->cfg->asd); i++) {
1556 if (app_input_index < (j + 1)) {
1557 *subdev_index = i;
1558 *subdev_input_index = app_input_index - j;
1559 return 0;
1560 }
1561 j++;
1562 }
1563 return -EINVAL;
1564 }
1565
1566 /*
1567 * vpfe_get_app_input - Get app input index for a given subdev input index
1568 * driver stores the input index of the current sub device and translate it
1569 * when application request the current input
1570 */
vpfe_get_app_input_index(struct vpfe_device * vpfe,int * app_input_index)1571 static int vpfe_get_app_input_index(struct vpfe_device *vpfe,
1572 int *app_input_index)
1573 {
1574 struct vpfe_config *cfg = vpfe->cfg;
1575 struct vpfe_subdev_info *sdinfo;
1576 struct i2c_client *client;
1577 struct i2c_client *curr_client;
1578 int i, j = 0;
1579
1580 curr_client = v4l2_get_subdevdata(vpfe->current_subdev->sd);
1581 for (i = 0; i < ARRAY_SIZE(vpfe->cfg->asd); i++) {
1582 sdinfo = &cfg->sub_devs[i];
1583 client = v4l2_get_subdevdata(sdinfo->sd);
1584 if (client->addr == curr_client->addr &&
1585 client->adapter->nr == curr_client->adapter->nr) {
1586 if (vpfe->current_input >= 1)
1587 return -1;
1588 *app_input_index = j + vpfe->current_input;
1589 return 0;
1590 }
1591 j++;
1592 }
1593 return -EINVAL;
1594 }
1595
vpfe_enum_input(struct file * file,void * priv,struct v4l2_input * inp)1596 static int vpfe_enum_input(struct file *file, void *priv,
1597 struct v4l2_input *inp)
1598 {
1599 struct vpfe_device *vpfe = video_drvdata(file);
1600 struct vpfe_subdev_info *sdinfo;
1601 int subdev, index;
1602
1603 if (vpfe_get_subdev_input_index(vpfe, &subdev, &index,
1604 inp->index) < 0) {
1605 vpfe_dbg(1, vpfe,
1606 "input information not found for the subdev\n");
1607 return -EINVAL;
1608 }
1609 sdinfo = &vpfe->cfg->sub_devs[subdev];
1610 *inp = sdinfo->inputs[index];
1611
1612 return 0;
1613 }
1614
vpfe_g_input(struct file * file,void * priv,unsigned int * index)1615 static int vpfe_g_input(struct file *file, void *priv, unsigned int *index)
1616 {
1617 struct vpfe_device *vpfe = video_drvdata(file);
1618
1619 return vpfe_get_app_input_index(vpfe, index);
1620 }
1621
1622 /* Assumes caller is holding vpfe_dev->lock */
vpfe_set_input(struct vpfe_device * vpfe,unsigned int index)1623 static int vpfe_set_input(struct vpfe_device *vpfe, unsigned int index)
1624 {
1625 int subdev_index = 0, inp_index = 0;
1626 struct vpfe_subdev_info *sdinfo;
1627 struct vpfe_route *route;
1628 u32 input, output;
1629 int ret;
1630
1631 /* If streaming is started, return error */
1632 if (vb2_is_busy(&vpfe->buffer_queue)) {
1633 vpfe_err(vpfe, "%s device busy\n", __func__);
1634 return -EBUSY;
1635 }
1636 ret = vpfe_get_subdev_input_index(vpfe,
1637 &subdev_index,
1638 &inp_index,
1639 index);
1640 if (ret < 0) {
1641 vpfe_err(vpfe, "invalid input index: %d\n", index);
1642 goto get_out;
1643 }
1644
1645 sdinfo = &vpfe->cfg->sub_devs[subdev_index];
1646 sdinfo->sd = vpfe->sd[subdev_index];
1647 route = &sdinfo->routes[inp_index];
1648 if (route && sdinfo->can_route) {
1649 input = route->input;
1650 output = route->output;
1651 if (sdinfo->sd) {
1652 ret = v4l2_subdev_call(sdinfo->sd, video,
1653 s_routing, input, output, 0);
1654 if (ret) {
1655 vpfe_err(vpfe, "s_routing failed\n");
1656 ret = -EINVAL;
1657 goto get_out;
1658 }
1659 }
1660
1661 }
1662
1663 vpfe->current_subdev = sdinfo;
1664 if (sdinfo->sd)
1665 vpfe->v4l2_dev.ctrl_handler = sdinfo->sd->ctrl_handler;
1666 vpfe->current_input = index;
1667 vpfe->std_index = 0;
1668
1669 /* set the bus/interface parameter for the sub device in ccdc */
1670 ret = vpfe_ccdc_set_hw_if_params(&vpfe->ccdc, &sdinfo->vpfe_param);
1671 if (ret)
1672 return ret;
1673
1674 /* set the default image parameters in the device */
1675 return vpfe_config_image_format(vpfe,
1676 vpfe_standards[vpfe->std_index].std_id);
1677
1678 get_out:
1679 return ret;
1680 }
1681
vpfe_s_input(struct file * file,void * priv,unsigned int index)1682 static int vpfe_s_input(struct file *file, void *priv, unsigned int index)
1683 {
1684 struct vpfe_device *vpfe = video_drvdata(file);
1685
1686 return vpfe_set_input(vpfe, index);
1687 }
1688
vpfe_querystd(struct file * file,void * priv,v4l2_std_id * std_id)1689 static int vpfe_querystd(struct file *file, void *priv, v4l2_std_id *std_id)
1690 {
1691 struct vpfe_device *vpfe = video_drvdata(file);
1692 struct vpfe_subdev_info *sdinfo;
1693
1694 sdinfo = vpfe->current_subdev;
1695 if (!(sdinfo->inputs[0].capabilities & V4L2_IN_CAP_STD))
1696 return -ENODATA;
1697
1698 /* Call querystd function of decoder device */
1699 return v4l2_device_call_until_err(&vpfe->v4l2_dev, sdinfo->grp_id,
1700 video, querystd, std_id);
1701 }
1702
vpfe_s_std(struct file * file,void * priv,v4l2_std_id std_id)1703 static int vpfe_s_std(struct file *file, void *priv, v4l2_std_id std_id)
1704 {
1705 struct vpfe_device *vpfe = video_drvdata(file);
1706 struct vpfe_subdev_info *sdinfo;
1707 int ret;
1708
1709 sdinfo = vpfe->current_subdev;
1710 if (!(sdinfo->inputs[0].capabilities & V4L2_IN_CAP_STD))
1711 return -ENODATA;
1712
1713 /* if trying to set the same std then nothing to do */
1714 if (vpfe_standards[vpfe->std_index].std_id == std_id)
1715 return 0;
1716
1717 /* If streaming is started, return error */
1718 if (vb2_is_busy(&vpfe->buffer_queue)) {
1719 vpfe_err(vpfe, "%s device busy\n", __func__);
1720 ret = -EBUSY;
1721 return ret;
1722 }
1723
1724 ret = v4l2_device_call_until_err(&vpfe->v4l2_dev, sdinfo->grp_id,
1725 video, s_std, std_id);
1726 if (ret < 0) {
1727 vpfe_err(vpfe, "Failed to set standard\n");
1728 return ret;
1729 }
1730 ret = vpfe_config_image_format(vpfe, std_id);
1731
1732 return ret;
1733 }
1734
vpfe_g_std(struct file * file,void * priv,v4l2_std_id * std_id)1735 static int vpfe_g_std(struct file *file, void *priv, v4l2_std_id *std_id)
1736 {
1737 struct vpfe_device *vpfe = video_drvdata(file);
1738 struct vpfe_subdev_info *sdinfo;
1739
1740 sdinfo = vpfe->current_subdev;
1741 if (sdinfo->inputs[0].capabilities != V4L2_IN_CAP_STD)
1742 return -ENODATA;
1743
1744 *std_id = vpfe_standards[vpfe->std_index].std_id;
1745
1746 return 0;
1747 }
1748
1749 /*
1750 * vpfe_calculate_offsets : This function calculates buffers offset
1751 * for top and bottom field
1752 */
vpfe_calculate_offsets(struct vpfe_device * vpfe)1753 static void vpfe_calculate_offsets(struct vpfe_device *vpfe)
1754 {
1755 struct v4l2_rect image_win;
1756
1757 vpfe_ccdc_get_image_window(&vpfe->ccdc, &image_win);
1758 vpfe->field_off = image_win.height * image_win.width;
1759 }
1760
1761 /*
1762 * vpfe_queue_setup - Callback function for buffer setup.
1763 * @vq: vb2_queue ptr
1764 * @nbuffers: ptr to number of buffers requested by application
1765 * @nplanes:: contains number of distinct video planes needed to hold a frame
1766 * @sizes[]: contains the size (in bytes) of each plane.
1767 * @alloc_devs: ptr to allocation context
1768 *
1769 * This callback function is called when reqbuf() is called to adjust
1770 * the buffer count and buffer size
1771 */
vpfe_queue_setup(struct vb2_queue * vq,unsigned int * nbuffers,unsigned int * nplanes,unsigned int sizes[],struct device * alloc_devs[])1772 static int vpfe_queue_setup(struct vb2_queue *vq,
1773 unsigned int *nbuffers, unsigned int *nplanes,
1774 unsigned int sizes[], struct device *alloc_devs[])
1775 {
1776 struct vpfe_device *vpfe = vb2_get_drv_priv(vq);
1777 unsigned size = vpfe->fmt.fmt.pix.sizeimage;
1778
1779 if (vq->num_buffers + *nbuffers < 3)
1780 *nbuffers = 3 - vq->num_buffers;
1781
1782 if (*nplanes) {
1783 if (sizes[0] < size)
1784 return -EINVAL;
1785 size = sizes[0];
1786 }
1787
1788 *nplanes = 1;
1789 sizes[0] = size;
1790
1791 vpfe_dbg(1, vpfe,
1792 "nbuffers=%d, size=%u\n", *nbuffers, sizes[0]);
1793
1794 /* Calculate field offset */
1795 vpfe_calculate_offsets(vpfe);
1796
1797 return 0;
1798 }
1799
1800 /*
1801 * vpfe_buffer_prepare : callback function for buffer prepare
1802 * @vb: ptr to vb2_buffer
1803 *
1804 * This is the callback function for buffer prepare when vb2_qbuf()
1805 * function is called. The buffer is prepared and user space virtual address
1806 * or user address is converted into physical address
1807 */
vpfe_buffer_prepare(struct vb2_buffer * vb)1808 static int vpfe_buffer_prepare(struct vb2_buffer *vb)
1809 {
1810 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
1811 struct vpfe_device *vpfe = vb2_get_drv_priv(vb->vb2_queue);
1812
1813 vb2_set_plane_payload(vb, 0, vpfe->fmt.fmt.pix.sizeimage);
1814
1815 if (vb2_get_plane_payload(vb, 0) > vb2_plane_size(vb, 0))
1816 return -EINVAL;
1817
1818 vbuf->field = vpfe->fmt.fmt.pix.field;
1819
1820 return 0;
1821 }
1822
1823 /*
1824 * vpfe_buffer_queue : Callback function to add buffer to DMA queue
1825 * @vb: ptr to vb2_buffer
1826 */
vpfe_buffer_queue(struct vb2_buffer * vb)1827 static void vpfe_buffer_queue(struct vb2_buffer *vb)
1828 {
1829 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
1830 struct vpfe_device *vpfe = vb2_get_drv_priv(vb->vb2_queue);
1831 struct vpfe_cap_buffer *buf = to_vpfe_buffer(vbuf);
1832 unsigned long flags = 0;
1833
1834 /* add the buffer to the DMA queue */
1835 spin_lock_irqsave(&vpfe->dma_queue_lock, flags);
1836 list_add_tail(&buf->list, &vpfe->dma_queue);
1837 spin_unlock_irqrestore(&vpfe->dma_queue_lock, flags);
1838 }
1839
vpfe_return_all_buffers(struct vpfe_device * vpfe,enum vb2_buffer_state state)1840 static void vpfe_return_all_buffers(struct vpfe_device *vpfe,
1841 enum vb2_buffer_state state)
1842 {
1843 struct vpfe_cap_buffer *buf, *node;
1844 unsigned long flags;
1845
1846 spin_lock_irqsave(&vpfe->dma_queue_lock, flags);
1847 list_for_each_entry_safe(buf, node, &vpfe->dma_queue, list) {
1848 vb2_buffer_done(&buf->vb.vb2_buf, state);
1849 list_del(&buf->list);
1850 }
1851
1852 if (vpfe->cur_frm)
1853 vb2_buffer_done(&vpfe->cur_frm->vb.vb2_buf, state);
1854
1855 if (vpfe->next_frm && vpfe->next_frm != vpfe->cur_frm)
1856 vb2_buffer_done(&vpfe->next_frm->vb.vb2_buf, state);
1857
1858 vpfe->cur_frm = NULL;
1859 vpfe->next_frm = NULL;
1860 spin_unlock_irqrestore(&vpfe->dma_queue_lock, flags);
1861 }
1862
1863 /*
1864 * vpfe_start_streaming : Starts the DMA engine for streaming
1865 * @vb: ptr to vb2_buffer
1866 * @count: number of buffers
1867 */
vpfe_start_streaming(struct vb2_queue * vq,unsigned int count)1868 static int vpfe_start_streaming(struct vb2_queue *vq, unsigned int count)
1869 {
1870 struct vpfe_device *vpfe = vb2_get_drv_priv(vq);
1871 struct vpfe_subdev_info *sdinfo;
1872 unsigned long flags;
1873 unsigned long addr;
1874 int ret;
1875
1876 spin_lock_irqsave(&vpfe->dma_queue_lock, flags);
1877
1878 vpfe->field = 0;
1879 vpfe->sequence = 0;
1880
1881 sdinfo = vpfe->current_subdev;
1882
1883 vpfe_attach_irq(vpfe);
1884
1885 vpfe->stopping = false;
1886 init_completion(&vpfe->capture_stop);
1887
1888 if (vpfe->ccdc.ccdc_cfg.if_type == VPFE_RAW_BAYER)
1889 vpfe_ccdc_config_raw(&vpfe->ccdc);
1890 else
1891 vpfe_ccdc_config_ycbcr(&vpfe->ccdc);
1892
1893 /* Get the next frame from the buffer queue */
1894 vpfe->next_frm = list_entry(vpfe->dma_queue.next,
1895 struct vpfe_cap_buffer, list);
1896 vpfe->cur_frm = vpfe->next_frm;
1897 /* Remove buffer from the buffer queue */
1898 list_del(&vpfe->cur_frm->list);
1899 spin_unlock_irqrestore(&vpfe->dma_queue_lock, flags);
1900
1901 addr = vb2_dma_contig_plane_dma_addr(&vpfe->cur_frm->vb.vb2_buf, 0);
1902
1903 vpfe_set_sdr_addr(&vpfe->ccdc, (unsigned long)(addr));
1904
1905 vpfe_pcr_enable(&vpfe->ccdc, 1);
1906
1907 ret = v4l2_subdev_call(sdinfo->sd, video, s_stream, 1);
1908 if (ret < 0) {
1909 vpfe_err(vpfe, "Error in attaching interrupt handle\n");
1910 goto err;
1911 }
1912
1913 return 0;
1914
1915 err:
1916 vpfe_return_all_buffers(vpfe, VB2_BUF_STATE_QUEUED);
1917 vpfe_pcr_enable(&vpfe->ccdc, 0);
1918 return ret;
1919 }
1920
1921 /*
1922 * vpfe_stop_streaming : Stop the DMA engine
1923 * @vq: ptr to vb2_queue
1924 *
1925 * This callback stops the DMA engine and any remaining buffers
1926 * in the DMA queue are released.
1927 */
vpfe_stop_streaming(struct vb2_queue * vq)1928 static void vpfe_stop_streaming(struct vb2_queue *vq)
1929 {
1930 struct vpfe_device *vpfe = vb2_get_drv_priv(vq);
1931 struct vpfe_subdev_info *sdinfo;
1932 int ret;
1933
1934 vpfe_pcr_enable(&vpfe->ccdc, 0);
1935
1936 /* Wait for the last frame to be captured */
1937 vpfe->stopping = true;
1938 wait_for_completion_timeout(&vpfe->capture_stop,
1939 msecs_to_jiffies(250));
1940
1941 vpfe_detach_irq(vpfe);
1942
1943 sdinfo = vpfe->current_subdev;
1944 ret = v4l2_subdev_call(sdinfo->sd, video, s_stream, 0);
1945 if (ret && ret != -ENOIOCTLCMD && ret != -ENODEV)
1946 vpfe_dbg(1, vpfe, "stream off failed in subdev\n");
1947
1948 /* release all active buffers */
1949 vpfe_return_all_buffers(vpfe, VB2_BUF_STATE_ERROR);
1950 }
1951
vpfe_g_pixelaspect(struct file * file,void * priv,int type,struct v4l2_fract * f)1952 static int vpfe_g_pixelaspect(struct file *file, void *priv,
1953 int type, struct v4l2_fract *f)
1954 {
1955 struct vpfe_device *vpfe = video_drvdata(file);
1956
1957 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1958 vpfe->std_index >= ARRAY_SIZE(vpfe_standards))
1959 return -EINVAL;
1960
1961 *f = vpfe_standards[vpfe->std_index].pixelaspect;
1962
1963 return 0;
1964 }
1965
1966 static int
vpfe_g_selection(struct file * file,void * fh,struct v4l2_selection * s)1967 vpfe_g_selection(struct file *file, void *fh, struct v4l2_selection *s)
1968 {
1969 struct vpfe_device *vpfe = video_drvdata(file);
1970
1971 if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1972 vpfe->std_index >= ARRAY_SIZE(vpfe_standards))
1973 return -EINVAL;
1974
1975 switch (s->target) {
1976 case V4L2_SEL_TGT_CROP_BOUNDS:
1977 case V4L2_SEL_TGT_CROP_DEFAULT:
1978 s->r.left = 0;
1979 s->r.top = 0;
1980 s->r.width = vpfe_standards[vpfe->std_index].width;
1981 s->r.height = vpfe_standards[vpfe->std_index].height;
1982 break;
1983
1984 case V4L2_SEL_TGT_CROP:
1985 s->r = vpfe->crop;
1986 break;
1987
1988 default:
1989 return -EINVAL;
1990 }
1991
1992 return 0;
1993 }
1994
1995 static int
vpfe_s_selection(struct file * file,void * fh,struct v4l2_selection * s)1996 vpfe_s_selection(struct file *file, void *fh, struct v4l2_selection *s)
1997 {
1998 struct vpfe_device *vpfe = video_drvdata(file);
1999 struct v4l2_rect cr = vpfe->crop;
2000 struct v4l2_rect r = s->r;
2001 u32 bpp;
2002
2003 /* If streaming is started, return error */
2004 if (vb2_is_busy(&vpfe->buffer_queue)) {
2005 vpfe_err(vpfe, "%s device busy\n", __func__);
2006 return -EBUSY;
2007 }
2008
2009 if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2010 s->target != V4L2_SEL_TGT_CROP)
2011 return -EINVAL;
2012
2013 v4l_bound_align_image(&r.width, 0, cr.width, 0,
2014 &r.height, 0, cr.height, 0, 0);
2015
2016 r.left = clamp_t(unsigned int, r.left, 0, cr.width - r.width);
2017 r.top = clamp_t(unsigned int, r.top, 0, cr.height - r.height);
2018
2019 if (s->flags & V4L2_SEL_FLAG_LE && !v4l2_rect_enclosed(&r, &s->r))
2020 return -ERANGE;
2021
2022 if (s->flags & V4L2_SEL_FLAG_GE && !v4l2_rect_enclosed(&s->r, &r))
2023 return -ERANGE;
2024
2025 s->r = vpfe->crop = r;
2026
2027 bpp = __get_bytesperpixel(vpfe, vpfe->current_vpfe_fmt);
2028 vpfe_ccdc_set_image_window(&vpfe->ccdc, &r, bpp);
2029 vpfe->fmt.fmt.pix.width = r.width;
2030 vpfe->fmt.fmt.pix.height = r.height;
2031 vpfe->fmt.fmt.pix.bytesperline =
2032 vpfe_ccdc_get_line_length(&vpfe->ccdc);
2033 vpfe->fmt.fmt.pix.sizeimage = vpfe->fmt.fmt.pix.bytesperline *
2034 vpfe->fmt.fmt.pix.height;
2035
2036 vpfe_dbg(1, vpfe, "cropped (%d,%d)/%dx%d of %dx%d\n",
2037 r.left, r.top, r.width, r.height, cr.width, cr.height);
2038
2039 return 0;
2040 }
2041
vpfe_ioctl_default(struct file * file,void * priv,bool valid_prio,unsigned int cmd,void * param)2042 static long vpfe_ioctl_default(struct file *file, void *priv,
2043 bool valid_prio, unsigned int cmd, void *param)
2044 {
2045 struct vpfe_device *vpfe = video_drvdata(file);
2046 int ret;
2047
2048 if (!valid_prio) {
2049 vpfe_err(vpfe, "%s device busy\n", __func__);
2050 return -EBUSY;
2051 }
2052
2053 /* If streaming is started, return error */
2054 if (vb2_is_busy(&vpfe->buffer_queue)) {
2055 vpfe_err(vpfe, "%s device busy\n", __func__);
2056 return -EBUSY;
2057 }
2058
2059 switch (cmd) {
2060 case VIDIOC_AM437X_CCDC_CFG:
2061 ret = vpfe_ccdc_set_params(&vpfe->ccdc, (void __user *)param);
2062 if (ret) {
2063 vpfe_dbg(2, vpfe,
2064 "Error setting parameters in CCDC\n");
2065 return ret;
2066 }
2067 ret = vpfe_get_ccdc_image_format(vpfe,
2068 &vpfe->fmt);
2069 if (ret < 0) {
2070 vpfe_dbg(2, vpfe,
2071 "Invalid image format at CCDC\n");
2072 return ret;
2073 }
2074 break;
2075
2076 default:
2077 ret = -ENOTTY;
2078 break;
2079 }
2080
2081 return ret;
2082 }
2083
2084 static const struct vb2_ops vpfe_video_qops = {
2085 .wait_prepare = vb2_ops_wait_prepare,
2086 .wait_finish = vb2_ops_wait_finish,
2087 .queue_setup = vpfe_queue_setup,
2088 .buf_prepare = vpfe_buffer_prepare,
2089 .buf_queue = vpfe_buffer_queue,
2090 .start_streaming = vpfe_start_streaming,
2091 .stop_streaming = vpfe_stop_streaming,
2092 };
2093
2094 /* vpfe capture driver file operations */
2095 static const struct v4l2_file_operations vpfe_fops = {
2096 .owner = THIS_MODULE,
2097 .open = vpfe_open,
2098 .release = vpfe_release,
2099 .read = vb2_fop_read,
2100 .poll = vb2_fop_poll,
2101 .unlocked_ioctl = video_ioctl2,
2102 .mmap = vb2_fop_mmap,
2103 };
2104
2105 /* vpfe capture ioctl operations */
2106 static const struct v4l2_ioctl_ops vpfe_ioctl_ops = {
2107 .vidioc_querycap = vpfe_querycap,
2108 .vidioc_enum_fmt_vid_cap = vpfe_enum_fmt,
2109 .vidioc_g_fmt_vid_cap = vpfe_g_fmt,
2110 .vidioc_s_fmt_vid_cap = vpfe_s_fmt,
2111 .vidioc_try_fmt_vid_cap = vpfe_try_fmt,
2112
2113 .vidioc_enum_framesizes = vpfe_enum_size,
2114
2115 .vidioc_enum_input = vpfe_enum_input,
2116 .vidioc_g_input = vpfe_g_input,
2117 .vidioc_s_input = vpfe_s_input,
2118
2119 .vidioc_querystd = vpfe_querystd,
2120 .vidioc_s_std = vpfe_s_std,
2121 .vidioc_g_std = vpfe_g_std,
2122
2123 .vidioc_reqbufs = vb2_ioctl_reqbufs,
2124 .vidioc_create_bufs = vb2_ioctl_create_bufs,
2125 .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
2126 .vidioc_querybuf = vb2_ioctl_querybuf,
2127 .vidioc_qbuf = vb2_ioctl_qbuf,
2128 .vidioc_dqbuf = vb2_ioctl_dqbuf,
2129 .vidioc_expbuf = vb2_ioctl_expbuf,
2130 .vidioc_streamon = vb2_ioctl_streamon,
2131 .vidioc_streamoff = vb2_ioctl_streamoff,
2132
2133 .vidioc_log_status = v4l2_ctrl_log_status,
2134 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
2135 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
2136
2137 .vidioc_g_pixelaspect = vpfe_g_pixelaspect,
2138 .vidioc_g_selection = vpfe_g_selection,
2139 .vidioc_s_selection = vpfe_s_selection,
2140
2141 .vidioc_default = vpfe_ioctl_default,
2142 };
2143
2144 static int
vpfe_async_bound(struct v4l2_async_notifier * notifier,struct v4l2_subdev * subdev,struct v4l2_async_connection * asd)2145 vpfe_async_bound(struct v4l2_async_notifier *notifier,
2146 struct v4l2_subdev *subdev,
2147 struct v4l2_async_connection *asd)
2148 {
2149 struct vpfe_device *vpfe = container_of(notifier->v4l2_dev,
2150 struct vpfe_device, v4l2_dev);
2151 struct vpfe_subdev_info *sdinfo;
2152 struct vpfe_fmt *fmt;
2153 int ret = 0;
2154 bool found = false;
2155 int i, j, k;
2156
2157 for (i = 0; i < ARRAY_SIZE(vpfe->cfg->asd); i++) {
2158 if (vpfe->cfg->asd[i]->match.fwnode ==
2159 asd[i].match.fwnode) {
2160 sdinfo = &vpfe->cfg->sub_devs[i];
2161 vpfe->sd[i] = subdev;
2162 vpfe->sd[i]->grp_id = sdinfo->grp_id;
2163 found = true;
2164 break;
2165 }
2166 }
2167
2168 if (!found) {
2169 vpfe_info(vpfe, "sub device (%s) not matched\n", subdev->name);
2170 return -EINVAL;
2171 }
2172
2173 vpfe->video_dev.tvnorms |= sdinfo->inputs[0].std;
2174
2175 vpfe->num_active_fmt = 0;
2176 for (j = 0, i = 0; (ret != -EINVAL); ++j) {
2177 struct v4l2_subdev_mbus_code_enum mbus_code = {
2178 .index = j,
2179 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
2180 };
2181
2182 ret = v4l2_subdev_call(subdev, pad, enum_mbus_code,
2183 NULL, &mbus_code);
2184 if (ret)
2185 continue;
2186
2187 vpfe_dbg(3, vpfe,
2188 "subdev %s: code: %04x idx: %d\n",
2189 subdev->name, mbus_code.code, j);
2190
2191 for (k = 0; k < ARRAY_SIZE(formats); k++) {
2192 fmt = &formats[k];
2193 if (mbus_code.code != fmt->code)
2194 continue;
2195 vpfe->active_fmt[i] = fmt;
2196 vpfe_dbg(3, vpfe,
2197 "matched fourcc: %s code: %04x idx: %d\n",
2198 print_fourcc(fmt->fourcc), mbus_code.code, i);
2199 vpfe->num_active_fmt = ++i;
2200 }
2201 }
2202
2203 if (!i) {
2204 vpfe_err(vpfe, "No suitable format reported by subdev %s\n",
2205 subdev->name);
2206 return -EINVAL;
2207 }
2208 return 0;
2209 }
2210
vpfe_probe_complete(struct vpfe_device * vpfe)2211 static int vpfe_probe_complete(struct vpfe_device *vpfe)
2212 {
2213 struct video_device *vdev;
2214 struct vb2_queue *q;
2215 int err;
2216
2217 spin_lock_init(&vpfe->dma_queue_lock);
2218 mutex_init(&vpfe->lock);
2219
2220 vpfe->fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2221
2222 /* set first sub device as current one */
2223 vpfe->current_subdev = &vpfe->cfg->sub_devs[0];
2224 vpfe->v4l2_dev.ctrl_handler = vpfe->sd[0]->ctrl_handler;
2225
2226 err = vpfe_set_input(vpfe, 0);
2227 if (err)
2228 goto probe_out;
2229
2230 /* Initialize videobuf2 queue as per the buffer type */
2231 q = &vpfe->buffer_queue;
2232 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2233 q->io_modes = VB2_MMAP | VB2_DMABUF | VB2_READ;
2234 q->drv_priv = vpfe;
2235 q->ops = &vpfe_video_qops;
2236 q->mem_ops = &vb2_dma_contig_memops;
2237 q->buf_struct_size = sizeof(struct vpfe_cap_buffer);
2238 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
2239 q->lock = &vpfe->lock;
2240 q->min_buffers_needed = 1;
2241 q->dev = vpfe->pdev;
2242
2243 err = vb2_queue_init(q);
2244 if (err) {
2245 vpfe_err(vpfe, "vb2_queue_init() failed\n");
2246 goto probe_out;
2247 }
2248
2249 INIT_LIST_HEAD(&vpfe->dma_queue);
2250
2251 vdev = &vpfe->video_dev;
2252 strscpy(vdev->name, VPFE_MODULE_NAME, sizeof(vdev->name));
2253 vdev->release = video_device_release_empty;
2254 vdev->fops = &vpfe_fops;
2255 vdev->ioctl_ops = &vpfe_ioctl_ops;
2256 vdev->v4l2_dev = &vpfe->v4l2_dev;
2257 vdev->vfl_dir = VFL_DIR_RX;
2258 vdev->queue = q;
2259 vdev->lock = &vpfe->lock;
2260 vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING |
2261 V4L2_CAP_READWRITE;
2262 video_set_drvdata(vdev, vpfe);
2263 err = video_register_device(&vpfe->video_dev, VFL_TYPE_VIDEO, -1);
2264 if (err) {
2265 vpfe_err(vpfe,
2266 "Unable to register video device.\n");
2267 goto probe_out;
2268 }
2269
2270 return 0;
2271
2272 probe_out:
2273 v4l2_device_unregister(&vpfe->v4l2_dev);
2274 return err;
2275 }
2276
vpfe_async_complete(struct v4l2_async_notifier * notifier)2277 static int vpfe_async_complete(struct v4l2_async_notifier *notifier)
2278 {
2279 struct vpfe_device *vpfe = container_of(notifier->v4l2_dev,
2280 struct vpfe_device, v4l2_dev);
2281
2282 return vpfe_probe_complete(vpfe);
2283 }
2284
2285 static const struct v4l2_async_notifier_operations vpfe_async_ops = {
2286 .bound = vpfe_async_bound,
2287 .complete = vpfe_async_complete,
2288 };
2289
2290 static struct vpfe_config *
vpfe_get_pdata(struct vpfe_device * vpfe)2291 vpfe_get_pdata(struct vpfe_device *vpfe)
2292 {
2293 struct device_node *endpoint = NULL;
2294 struct device *dev = vpfe->pdev;
2295 struct vpfe_subdev_info *sdinfo;
2296 struct vpfe_config *pdata;
2297 unsigned int flags;
2298 unsigned int i;
2299 int err;
2300
2301 dev_dbg(dev, "vpfe_get_pdata\n");
2302
2303 v4l2_async_nf_init(&vpfe->notifier, &vpfe->v4l2_dev);
2304
2305 if (!IS_ENABLED(CONFIG_OF) || !dev->of_node)
2306 return dev->platform_data;
2307
2308 pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
2309 if (!pdata)
2310 return NULL;
2311
2312 for (i = 0; ; i++) {
2313 struct v4l2_fwnode_endpoint bus_cfg = { .bus_type = 0 };
2314 struct device_node *rem;
2315
2316 endpoint = of_graph_get_next_endpoint(dev->of_node, endpoint);
2317 if (!endpoint)
2318 break;
2319
2320 sdinfo = &pdata->sub_devs[i];
2321 sdinfo->grp_id = 0;
2322
2323 /* we only support camera */
2324 sdinfo->inputs[0].index = i;
2325 strscpy(sdinfo->inputs[0].name, "Camera",
2326 sizeof(sdinfo->inputs[0].name));
2327 sdinfo->inputs[0].type = V4L2_INPUT_TYPE_CAMERA;
2328 sdinfo->inputs[0].std = V4L2_STD_ALL;
2329 sdinfo->inputs[0].capabilities = V4L2_IN_CAP_STD;
2330
2331 sdinfo->can_route = 0;
2332 sdinfo->routes = NULL;
2333
2334 of_property_read_u32(endpoint, "ti,am437x-vpfe-interface",
2335 &sdinfo->vpfe_param.if_type);
2336 if (sdinfo->vpfe_param.if_type < 0 ||
2337 sdinfo->vpfe_param.if_type > 4) {
2338 sdinfo->vpfe_param.if_type = VPFE_RAW_BAYER;
2339 }
2340
2341 err = v4l2_fwnode_endpoint_parse(of_fwnode_handle(endpoint),
2342 &bus_cfg);
2343 if (err) {
2344 dev_err(dev, "Could not parse the endpoint\n");
2345 goto cleanup;
2346 }
2347
2348 sdinfo->vpfe_param.bus_width = bus_cfg.bus.parallel.bus_width;
2349
2350 if (sdinfo->vpfe_param.bus_width < 8 ||
2351 sdinfo->vpfe_param.bus_width > 16) {
2352 dev_err(dev, "Invalid bus width.\n");
2353 goto cleanup;
2354 }
2355
2356 flags = bus_cfg.bus.parallel.flags;
2357
2358 if (flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH)
2359 sdinfo->vpfe_param.hdpol = 1;
2360
2361 if (flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH)
2362 sdinfo->vpfe_param.vdpol = 1;
2363
2364 rem = of_graph_get_remote_port_parent(endpoint);
2365 if (!rem) {
2366 dev_err(dev, "Remote device at %pOF not found\n",
2367 endpoint);
2368 goto cleanup;
2369 }
2370
2371 pdata->asd[i] = v4l2_async_nf_add_fwnode(&vpfe->notifier,
2372 of_fwnode_handle(rem),
2373 struct v4l2_async_connection);
2374 of_node_put(rem);
2375 if (IS_ERR(pdata->asd[i]))
2376 goto cleanup;
2377 }
2378
2379 of_node_put(endpoint);
2380 return pdata;
2381
2382 cleanup:
2383 v4l2_async_nf_cleanup(&vpfe->notifier);
2384 of_node_put(endpoint);
2385 return NULL;
2386 }
2387
2388 /*
2389 * vpfe_probe : This function creates device entries by register
2390 * itself to the V4L2 driver and initializes fields of each
2391 * device objects
2392 */
vpfe_probe(struct platform_device * pdev)2393 static int vpfe_probe(struct platform_device *pdev)
2394 {
2395 struct vpfe_config *vpfe_cfg;
2396 struct vpfe_device *vpfe;
2397 struct vpfe_ccdc *ccdc;
2398 int ret;
2399
2400 vpfe = devm_kzalloc(&pdev->dev, sizeof(*vpfe), GFP_KERNEL);
2401 if (!vpfe)
2402 return -ENOMEM;
2403
2404 vpfe->pdev = &pdev->dev;
2405
2406 ret = v4l2_device_register(&pdev->dev, &vpfe->v4l2_dev);
2407 if (ret) {
2408 vpfe_err(vpfe, "Unable to register v4l2 device.\n");
2409 return ret;
2410 }
2411
2412 vpfe_cfg = vpfe_get_pdata(vpfe);
2413 if (!vpfe_cfg) {
2414 dev_err(&pdev->dev, "No platform data\n");
2415 ret = -EINVAL;
2416 goto probe_out_cleanup;
2417 }
2418
2419 vpfe->cfg = vpfe_cfg;
2420 ccdc = &vpfe->ccdc;
2421
2422 ccdc->ccdc_cfg.base_addr = devm_platform_ioremap_resource(pdev, 0);
2423 if (IS_ERR(ccdc->ccdc_cfg.base_addr)) {
2424 ret = PTR_ERR(ccdc->ccdc_cfg.base_addr);
2425 goto probe_out_cleanup;
2426 }
2427
2428 ret = platform_get_irq(pdev, 0);
2429 if (ret < 0)
2430 goto probe_out_cleanup;
2431 vpfe->irq = ret;
2432
2433 ret = devm_request_irq(vpfe->pdev, vpfe->irq, vpfe_isr, 0,
2434 "vpfe_capture0", vpfe);
2435 if (ret) {
2436 dev_err(&pdev->dev, "Unable to request interrupt\n");
2437 ret = -EINVAL;
2438 goto probe_out_cleanup;
2439 }
2440
2441 /* set the driver data in platform device */
2442 platform_set_drvdata(pdev, vpfe);
2443 /* Enabling module functional clock */
2444 pm_runtime_enable(&pdev->dev);
2445
2446 /* for now just enable it here instead of waiting for the open */
2447 ret = pm_runtime_resume_and_get(&pdev->dev);
2448 if (ret < 0) {
2449 vpfe_err(vpfe, "Unable to resume device.\n");
2450 goto probe_out_cleanup;
2451 }
2452
2453 vpfe_ccdc_config_defaults(ccdc);
2454
2455 pm_runtime_put_sync(&pdev->dev);
2456
2457 vpfe->sd = devm_kcalloc(&pdev->dev,
2458 ARRAY_SIZE(vpfe->cfg->asd),
2459 sizeof(struct v4l2_subdev *),
2460 GFP_KERNEL);
2461 if (!vpfe->sd) {
2462 ret = -ENOMEM;
2463 goto probe_out_cleanup;
2464 }
2465
2466 vpfe->notifier.ops = &vpfe_async_ops;
2467 ret = v4l2_async_nf_register(&vpfe->notifier);
2468 if (ret) {
2469 vpfe_err(vpfe, "Error registering async notifier\n");
2470 ret = -EINVAL;
2471 goto probe_out_cleanup;
2472 }
2473
2474 return 0;
2475
2476 probe_out_cleanup:
2477 v4l2_async_nf_cleanup(&vpfe->notifier);
2478 v4l2_device_unregister(&vpfe->v4l2_dev);
2479 return ret;
2480 }
2481
2482 /*
2483 * vpfe_remove : It un-register device from V4L2 driver
2484 */
vpfe_remove(struct platform_device * pdev)2485 static void vpfe_remove(struct platform_device *pdev)
2486 {
2487 struct vpfe_device *vpfe = platform_get_drvdata(pdev);
2488
2489 pm_runtime_disable(&pdev->dev);
2490
2491 v4l2_async_nf_unregister(&vpfe->notifier);
2492 v4l2_async_nf_cleanup(&vpfe->notifier);
2493 video_unregister_device(&vpfe->video_dev);
2494 v4l2_device_unregister(&vpfe->v4l2_dev);
2495 }
2496
2497 #ifdef CONFIG_PM_SLEEP
2498
vpfe_save_context(struct vpfe_ccdc * ccdc)2499 static void vpfe_save_context(struct vpfe_ccdc *ccdc)
2500 {
2501 ccdc->ccdc_ctx[VPFE_PCR >> 2] = vpfe_reg_read(ccdc, VPFE_PCR);
2502 ccdc->ccdc_ctx[VPFE_SYNMODE >> 2] = vpfe_reg_read(ccdc, VPFE_SYNMODE);
2503 ccdc->ccdc_ctx[VPFE_SDOFST >> 2] = vpfe_reg_read(ccdc, VPFE_SDOFST);
2504 ccdc->ccdc_ctx[VPFE_SDR_ADDR >> 2] = vpfe_reg_read(ccdc, VPFE_SDR_ADDR);
2505 ccdc->ccdc_ctx[VPFE_CLAMP >> 2] = vpfe_reg_read(ccdc, VPFE_CLAMP);
2506 ccdc->ccdc_ctx[VPFE_DCSUB >> 2] = vpfe_reg_read(ccdc, VPFE_DCSUB);
2507 ccdc->ccdc_ctx[VPFE_COLPTN >> 2] = vpfe_reg_read(ccdc, VPFE_COLPTN);
2508 ccdc->ccdc_ctx[VPFE_BLKCMP >> 2] = vpfe_reg_read(ccdc, VPFE_BLKCMP);
2509 ccdc->ccdc_ctx[VPFE_VDINT >> 2] = vpfe_reg_read(ccdc, VPFE_VDINT);
2510 ccdc->ccdc_ctx[VPFE_ALAW >> 2] = vpfe_reg_read(ccdc, VPFE_ALAW);
2511 ccdc->ccdc_ctx[VPFE_REC656IF >> 2] = vpfe_reg_read(ccdc, VPFE_REC656IF);
2512 ccdc->ccdc_ctx[VPFE_CCDCFG >> 2] = vpfe_reg_read(ccdc, VPFE_CCDCFG);
2513 ccdc->ccdc_ctx[VPFE_CULLING >> 2] = vpfe_reg_read(ccdc, VPFE_CULLING);
2514 ccdc->ccdc_ctx[VPFE_HD_VD_WID >> 2] = vpfe_reg_read(ccdc,
2515 VPFE_HD_VD_WID);
2516 ccdc->ccdc_ctx[VPFE_PIX_LINES >> 2] = vpfe_reg_read(ccdc,
2517 VPFE_PIX_LINES);
2518 ccdc->ccdc_ctx[VPFE_HORZ_INFO >> 2] = vpfe_reg_read(ccdc,
2519 VPFE_HORZ_INFO);
2520 ccdc->ccdc_ctx[VPFE_VERT_START >> 2] = vpfe_reg_read(ccdc,
2521 VPFE_VERT_START);
2522 ccdc->ccdc_ctx[VPFE_VERT_LINES >> 2] = vpfe_reg_read(ccdc,
2523 VPFE_VERT_LINES);
2524 ccdc->ccdc_ctx[VPFE_HSIZE_OFF >> 2] = vpfe_reg_read(ccdc,
2525 VPFE_HSIZE_OFF);
2526 }
2527
vpfe_suspend(struct device * dev)2528 static int vpfe_suspend(struct device *dev)
2529 {
2530 struct vpfe_device *vpfe = dev_get_drvdata(dev);
2531 struct vpfe_ccdc *ccdc = &vpfe->ccdc;
2532
2533 /* only do full suspend if streaming has started */
2534 if (vb2_start_streaming_called(&vpfe->buffer_queue)) {
2535 /*
2536 * ignore RPM resume errors here, as it is already too late.
2537 * A check like that should happen earlier, either at
2538 * open() or just before start streaming.
2539 */
2540 pm_runtime_get_sync(dev);
2541 vpfe_config_enable(ccdc, 1);
2542
2543 /* Save VPFE context */
2544 vpfe_save_context(ccdc);
2545
2546 /* Disable CCDC */
2547 vpfe_pcr_enable(ccdc, 0);
2548 vpfe_config_enable(ccdc, 0);
2549
2550 /* Disable both master and slave clock */
2551 pm_runtime_put_sync(dev);
2552 }
2553
2554 /* Select sleep pin state */
2555 pinctrl_pm_select_sleep_state(dev);
2556
2557 return 0;
2558 }
2559
vpfe_restore_context(struct vpfe_ccdc * ccdc)2560 static void vpfe_restore_context(struct vpfe_ccdc *ccdc)
2561 {
2562 vpfe_reg_write(ccdc, ccdc->ccdc_ctx[VPFE_SYNMODE >> 2], VPFE_SYNMODE);
2563 vpfe_reg_write(ccdc, ccdc->ccdc_ctx[VPFE_CULLING >> 2], VPFE_CULLING);
2564 vpfe_reg_write(ccdc, ccdc->ccdc_ctx[VPFE_SDOFST >> 2], VPFE_SDOFST);
2565 vpfe_reg_write(ccdc, ccdc->ccdc_ctx[VPFE_SDR_ADDR >> 2], VPFE_SDR_ADDR);
2566 vpfe_reg_write(ccdc, ccdc->ccdc_ctx[VPFE_CLAMP >> 2], VPFE_CLAMP);
2567 vpfe_reg_write(ccdc, ccdc->ccdc_ctx[VPFE_DCSUB >> 2], VPFE_DCSUB);
2568 vpfe_reg_write(ccdc, ccdc->ccdc_ctx[VPFE_COLPTN >> 2], VPFE_COLPTN);
2569 vpfe_reg_write(ccdc, ccdc->ccdc_ctx[VPFE_BLKCMP >> 2], VPFE_BLKCMP);
2570 vpfe_reg_write(ccdc, ccdc->ccdc_ctx[VPFE_VDINT >> 2], VPFE_VDINT);
2571 vpfe_reg_write(ccdc, ccdc->ccdc_ctx[VPFE_ALAW >> 2], VPFE_ALAW);
2572 vpfe_reg_write(ccdc, ccdc->ccdc_ctx[VPFE_REC656IF >> 2], VPFE_REC656IF);
2573 vpfe_reg_write(ccdc, ccdc->ccdc_ctx[VPFE_CCDCFG >> 2], VPFE_CCDCFG);
2574 vpfe_reg_write(ccdc, ccdc->ccdc_ctx[VPFE_PCR >> 2], VPFE_PCR);
2575 vpfe_reg_write(ccdc, ccdc->ccdc_ctx[VPFE_HD_VD_WID >> 2],
2576 VPFE_HD_VD_WID);
2577 vpfe_reg_write(ccdc, ccdc->ccdc_ctx[VPFE_PIX_LINES >> 2],
2578 VPFE_PIX_LINES);
2579 vpfe_reg_write(ccdc, ccdc->ccdc_ctx[VPFE_HORZ_INFO >> 2],
2580 VPFE_HORZ_INFO);
2581 vpfe_reg_write(ccdc, ccdc->ccdc_ctx[VPFE_VERT_START >> 2],
2582 VPFE_VERT_START);
2583 vpfe_reg_write(ccdc, ccdc->ccdc_ctx[VPFE_VERT_LINES >> 2],
2584 VPFE_VERT_LINES);
2585 vpfe_reg_write(ccdc, ccdc->ccdc_ctx[VPFE_HSIZE_OFF >> 2],
2586 VPFE_HSIZE_OFF);
2587 }
2588
vpfe_resume(struct device * dev)2589 static int vpfe_resume(struct device *dev)
2590 {
2591 struct vpfe_device *vpfe = dev_get_drvdata(dev);
2592 struct vpfe_ccdc *ccdc = &vpfe->ccdc;
2593
2594 /* only do full resume if streaming has started */
2595 if (vb2_start_streaming_called(&vpfe->buffer_queue)) {
2596 /* Enable both master and slave clock */
2597 pm_runtime_get_sync(dev);
2598 vpfe_config_enable(ccdc, 1);
2599
2600 /* Restore VPFE context */
2601 vpfe_restore_context(ccdc);
2602
2603 vpfe_config_enable(ccdc, 0);
2604 pm_runtime_put_sync(dev);
2605 }
2606
2607 /* Select default pin state */
2608 pinctrl_pm_select_default_state(dev);
2609
2610 return 0;
2611 }
2612
2613 #endif
2614
2615 static SIMPLE_DEV_PM_OPS(vpfe_pm_ops, vpfe_suspend, vpfe_resume);
2616
2617 static const struct of_device_id vpfe_of_match[] = {
2618 { .compatible = "ti,am437x-vpfe", },
2619 { /* sentinel */ },
2620 };
2621 MODULE_DEVICE_TABLE(of, vpfe_of_match);
2622
2623 static struct platform_driver vpfe_driver = {
2624 .probe = vpfe_probe,
2625 .remove_new = vpfe_remove,
2626 .driver = {
2627 .name = VPFE_MODULE_NAME,
2628 .pm = &vpfe_pm_ops,
2629 .of_match_table = vpfe_of_match,
2630 },
2631 };
2632
2633 module_platform_driver(vpfe_driver);
2634
2635 MODULE_AUTHOR("Texas Instruments");
2636 MODULE_DESCRIPTION("TI AM437x VPFE driver");
2637 MODULE_LICENSE("GPL");
2638 MODULE_VERSION(VPFE_VERSION);
2639