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 
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 
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 
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) */
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 
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 
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 
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
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 
190 static inline void vpfe_pcr_enable(struct vpfe_ccdc *ccdc, int flag)
191 {
192 	vpfe_reg_write(ccdc, !!flag, VPFE_PCR);
193 }
194 
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 
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 
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
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
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  */
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 
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 
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  */
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, &params->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
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
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  */
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, &params->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
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 
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 
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 
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
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
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 
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
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
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 
733 static inline int vpfe_ccdc_getfid(struct vpfe_ccdc *ccdc)
734 {
735 	return (vpfe_reg_read(ccdc, VPFE_SYNMODE) >> 15) & 1;
736 }
737 
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 
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 
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 
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  */
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 
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  */
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 
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  */
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  */
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  */
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 
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  */
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 
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  */
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 
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 
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 
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 */
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 */
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 
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 
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 
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 
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 
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 
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
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  */
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 
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 
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 */
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 
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 
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 
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 
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  */
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  */
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  */
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  */
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 
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  */
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  */
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 
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
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
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 
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
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 
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 
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 *
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  */
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  */
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 
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 
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 
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 
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