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49#include <linux/bitops.h>
50#include <linux/clk.h>
51#include <linux/dma-mapping.h>
52#include <linux/dmaengine.h>
53#include <linux/ioctl.h>
54#include <linux/iopoll.h>
55#include <linux/module.h>
56#include <linux/of_graph.h>
57#include <linux/of_device.h>
58#include <linux/platform_device.h>
59#include <linux/sched.h>
60#include <media/v4l2-async.h>
61#include <media/v4l2-ctrls.h>
62#include <media/v4l2-device.h>
63#include <media/v4l2-event.h>
64#include <media/v4l2-fh.h>
65#include <media/v4l2-ioctl.h>
66#include <media/videobuf2-v4l2.h>
67#include <media/videobuf2-vmalloc.h>
68
69
70#define RCAR_DRIF_SITMDR1 0x00
71#define RCAR_DRIF_SITMDR2 0x04
72#define RCAR_DRIF_SITMDR3 0x08
73#define RCAR_DRIF_SIRMDR1 0x10
74#define RCAR_DRIF_SIRMDR2 0x14
75#define RCAR_DRIF_SIRMDR3 0x18
76#define RCAR_DRIF_SICTR 0x28
77#define RCAR_DRIF_SIFCTR 0x30
78#define RCAR_DRIF_SISTR 0x40
79#define RCAR_DRIF_SIIER 0x44
80#define RCAR_DRIF_SIRFDR 0x60
81
82#define RCAR_DRIF_RFOVF BIT(3)
83#define RCAR_DRIF_RFUDF BIT(4)
84#define RCAR_DRIF_RFSERR BIT(5)
85#define RCAR_DRIF_REOF BIT(7)
86#define RCAR_DRIF_RDREQ BIT(12)
87#define RCAR_DRIF_RFFUL BIT(13)
88
89
90#define RCAR_DRIF_SIRMDR1_SYNCMD_FRAME (0 << 28)
91#define RCAR_DRIF_SIRMDR1_SYNCMD_LR (3 << 28)
92
93#define RCAR_DRIF_SIRMDR1_SYNCAC_POL_HIGH (0 << 25)
94#define RCAR_DRIF_SIRMDR1_SYNCAC_POL_LOW (1 << 25)
95
96#define RCAR_DRIF_SIRMDR1_MSB_FIRST (0 << 24)
97#define RCAR_DRIF_SIRMDR1_LSB_FIRST (1 << 24)
98
99#define RCAR_DRIF_SIRMDR1_DTDL_0 (0 << 20)
100#define RCAR_DRIF_SIRMDR1_DTDL_1 (1 << 20)
101#define RCAR_DRIF_SIRMDR1_DTDL_2 (2 << 20)
102#define RCAR_DRIF_SIRMDR1_DTDL_0PT5 (5 << 20)
103#define RCAR_DRIF_SIRMDR1_DTDL_1PT5 (6 << 20)
104
105#define RCAR_DRIF_SIRMDR1_SYNCDL_0 (0 << 20)
106#define RCAR_DRIF_SIRMDR1_SYNCDL_1 (1 << 20)
107#define RCAR_DRIF_SIRMDR1_SYNCDL_2 (2 << 20)
108#define RCAR_DRIF_SIRMDR1_SYNCDL_3 (3 << 20)
109#define RCAR_DRIF_SIRMDR1_SYNCDL_0PT5 (5 << 20)
110#define RCAR_DRIF_SIRMDR1_SYNCDL_1PT5 (6 << 20)
111
112#define RCAR_DRIF_MDR_GRPCNT(n) (((n) - 1) << 30)
113#define RCAR_DRIF_MDR_BITLEN(n) (((n) - 1) << 24)
114#define RCAR_DRIF_MDR_WDCNT(n) (((n) - 1) << 16)
115
116
117#define RCAR_DRIF_SITMDR1_PCON BIT(30)
118
119#define RCAR_DRIF_SICTR_RX_RISING_EDGE BIT(26)
120#define RCAR_DRIF_SICTR_RX_EN BIT(8)
121#define RCAR_DRIF_SICTR_RESET BIT(0)
122
123
124#define RCAR_DRIF_NUM_HWBUFS 32
125#define RCAR_DRIF_MAX_DEVS 4
126#define RCAR_DRIF_DEFAULT_NUM_HWBUFS 16
127#define RCAR_DRIF_DEFAULT_HWBUF_SIZE (4 * PAGE_SIZE)
128#define RCAR_DRIF_MAX_CHANNEL 2
129#define RCAR_SDR_BUFFER_SIZE SZ_64K
130
131
132#define RCAR_DRIF_BUF_DONE BIT(0)
133#define RCAR_DRIF_BUF_OVERFLOW BIT(1)
134
135#define to_rcar_drif_buf_pair(sdr, ch_num, idx) \
136 (&((sdr)->ch[!(ch_num)]->buf[(idx)]))
137
138#define for_each_rcar_drif_channel(ch, ch_mask) \
139 for_each_set_bit(ch, ch_mask, RCAR_DRIF_MAX_CHANNEL)
140
141
142#define rdrif_dbg(sdr, fmt, arg...) \
143 dev_dbg(sdr->v4l2_dev.dev, fmt, ## arg)
144
145#define rdrif_err(sdr, fmt, arg...) \
146 dev_err(sdr->v4l2_dev.dev, fmt, ## arg)
147
148
149struct rcar_drif_format {
150 u32 pixelformat;
151 u32 buffersize;
152 u32 bitlen;
153 u32 wdcnt;
154 u32 num_ch;
155};
156
157
158static const struct rcar_drif_format formats[] = {
159 {
160 .pixelformat = V4L2_SDR_FMT_PCU16BE,
161 .buffersize = RCAR_SDR_BUFFER_SIZE,
162 .bitlen = 16,
163 .wdcnt = 1,
164 .num_ch = 2,
165 },
166 {
167 .pixelformat = V4L2_SDR_FMT_PCU18BE,
168 .buffersize = RCAR_SDR_BUFFER_SIZE,
169 .bitlen = 18,
170 .wdcnt = 1,
171 .num_ch = 2,
172 },
173 {
174 .pixelformat = V4L2_SDR_FMT_PCU20BE,
175 .buffersize = RCAR_SDR_BUFFER_SIZE,
176 .bitlen = 20,
177 .wdcnt = 1,
178 .num_ch = 2,
179 },
180};
181
182
183struct rcar_drif_frame_buf {
184
185 struct vb2_v4l2_buffer vb;
186 struct list_head list;
187};
188
189
190struct rcar_drif_graph_ep {
191 struct v4l2_subdev *subdev;
192 struct v4l2_async_subdev asd;
193};
194
195
196struct rcar_drif_hwbuf {
197 void *addr;
198 unsigned int status;
199};
200
201
202struct rcar_drif {
203 struct rcar_drif_sdr *sdr;
204 struct platform_device *pdev;
205 void __iomem *base;
206 resource_size_t start;
207 struct dma_chan *dmach;
208 struct clk *clk;
209 struct rcar_drif_hwbuf buf[RCAR_DRIF_NUM_HWBUFS];
210 dma_addr_t dma_handle;
211 unsigned int num;
212 bool acting_sdr;
213};
214
215
216struct rcar_drif_sdr {
217 struct device *dev;
218 struct video_device *vdev;
219 struct v4l2_device v4l2_dev;
220
221
222 struct vb2_queue vb_queue;
223 struct list_head queued_bufs;
224 spinlock_t queued_bufs_lock;
225 spinlock_t dma_lock;
226
227 struct mutex v4l2_mutex;
228 struct mutex vb_queue_mutex;
229 struct v4l2_ctrl_handler ctrl_hdl;
230 struct v4l2_async_notifier notifier;
231 struct rcar_drif_graph_ep ep;
232
233
234 const struct rcar_drif_format *fmt;
235
236
237 u32 mdr1;
238
239
240 struct rcar_drif *ch[RCAR_DRIF_MAX_CHANNEL];
241 unsigned long hw_ch_mask;
242 unsigned long cur_ch_mask;
243 u32 num_hw_ch;
244 u32 num_cur_ch;
245 u32 hwbuf_size;
246 u32 produced;
247};
248
249
250static void rcar_drif_write(struct rcar_drif *ch, u32 offset, u32 data)
251{
252 writel(data, ch->base + offset);
253}
254
255static u32 rcar_drif_read(struct rcar_drif *ch, u32 offset)
256{
257 return readl(ch->base + offset);
258}
259
260
261static void rcar_drif_release_dmachannels(struct rcar_drif_sdr *sdr)
262{
263 unsigned int i;
264
265 for_each_rcar_drif_channel(i, &sdr->cur_ch_mask)
266 if (sdr->ch[i]->dmach) {
267 dma_release_channel(sdr->ch[i]->dmach);
268 sdr->ch[i]->dmach = NULL;
269 }
270}
271
272
273static int rcar_drif_alloc_dmachannels(struct rcar_drif_sdr *sdr)
274{
275 struct dma_slave_config dma_cfg;
276 unsigned int i;
277 int ret;
278
279 for_each_rcar_drif_channel(i, &sdr->cur_ch_mask) {
280 struct rcar_drif *ch = sdr->ch[i];
281
282 ch->dmach = dma_request_slave_channel(&ch->pdev->dev, "rx");
283 if (!ch->dmach) {
284 rdrif_err(sdr, "ch%u: dma channel req failed\n", i);
285 ret = -ENODEV;
286 goto dmach_error;
287 }
288
289
290 memset(&dma_cfg, 0, sizeof(dma_cfg));
291 dma_cfg.src_addr = (phys_addr_t)(ch->start + RCAR_DRIF_SIRFDR);
292 dma_cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
293 ret = dmaengine_slave_config(ch->dmach, &dma_cfg);
294 if (ret) {
295 rdrif_err(sdr, "ch%u: dma slave config failed\n", i);
296 goto dmach_error;
297 }
298 }
299 return 0;
300
301dmach_error:
302 rcar_drif_release_dmachannels(sdr);
303 return ret;
304}
305
306
307static void rcar_drif_release_queued_bufs(struct rcar_drif_sdr *sdr,
308 enum vb2_buffer_state state)
309{
310 struct rcar_drif_frame_buf *fbuf, *tmp;
311 unsigned long flags;
312
313 spin_lock_irqsave(&sdr->queued_bufs_lock, flags);
314 list_for_each_entry_safe(fbuf, tmp, &sdr->queued_bufs, list) {
315 list_del(&fbuf->list);
316 vb2_buffer_done(&fbuf->vb.vb2_buf, state);
317 }
318 spin_unlock_irqrestore(&sdr->queued_bufs_lock, flags);
319}
320
321
322static inline void rcar_drif_set_mdr1(struct rcar_drif_sdr *sdr)
323{
324 unsigned int i;
325
326
327 for_each_rcar_drif_channel(i, &sdr->cur_ch_mask) {
328
329 rcar_drif_write(sdr->ch[i], RCAR_DRIF_SITMDR1,
330 RCAR_DRIF_SITMDR1_PCON);
331
332
333 rcar_drif_write(sdr->ch[i], RCAR_DRIF_SIRMDR1, sdr->mdr1);
334
335 rdrif_dbg(sdr, "ch%u: mdr1 = 0x%08x",
336 i, rcar_drif_read(sdr->ch[i], RCAR_DRIF_SIRMDR1));
337 }
338}
339
340
341static int rcar_drif_set_format(struct rcar_drif_sdr *sdr)
342{
343 unsigned int i;
344
345 rdrif_dbg(sdr, "setfmt: bitlen %u wdcnt %u num_ch %u\n",
346 sdr->fmt->bitlen, sdr->fmt->wdcnt, sdr->fmt->num_ch);
347
348
349 if (sdr->fmt->num_ch > sdr->num_cur_ch) {
350 rdrif_err(sdr, "fmt num_ch %u cur_ch %u mismatch\n",
351 sdr->fmt->num_ch, sdr->num_cur_ch);
352 return -EINVAL;
353 }
354
355
356 for_each_rcar_drif_channel(i, &sdr->cur_ch_mask) {
357 u32 mdr;
358
359
360 mdr = RCAR_DRIF_MDR_GRPCNT(2) |
361 RCAR_DRIF_MDR_BITLEN(sdr->fmt->bitlen) |
362 RCAR_DRIF_MDR_WDCNT(sdr->fmt->wdcnt);
363 rcar_drif_write(sdr->ch[i], RCAR_DRIF_SIRMDR2, mdr);
364
365 mdr = RCAR_DRIF_MDR_BITLEN(sdr->fmt->bitlen) |
366 RCAR_DRIF_MDR_WDCNT(sdr->fmt->wdcnt);
367 rcar_drif_write(sdr->ch[i], RCAR_DRIF_SIRMDR3, mdr);
368
369 rdrif_dbg(sdr, "ch%u: new mdr[2,3] = 0x%08x, 0x%08x\n",
370 i, rcar_drif_read(sdr->ch[i], RCAR_DRIF_SIRMDR2),
371 rcar_drif_read(sdr->ch[i], RCAR_DRIF_SIRMDR3));
372 }
373 return 0;
374}
375
376
377static void rcar_drif_release_buf(struct rcar_drif_sdr *sdr)
378{
379 unsigned int i;
380
381 for_each_rcar_drif_channel(i, &sdr->cur_ch_mask) {
382 struct rcar_drif *ch = sdr->ch[i];
383
384
385 if (ch->buf[0].addr) {
386 dma_free_coherent(&ch->pdev->dev,
387 sdr->hwbuf_size * RCAR_DRIF_NUM_HWBUFS,
388 ch->buf[0].addr, ch->dma_handle);
389 ch->buf[0].addr = NULL;
390 }
391 }
392}
393
394
395static int rcar_drif_request_buf(struct rcar_drif_sdr *sdr)
396{
397 int ret = -ENOMEM;
398 unsigned int i, j;
399 void *addr;
400
401 for_each_rcar_drif_channel(i, &sdr->cur_ch_mask) {
402 struct rcar_drif *ch = sdr->ch[i];
403
404
405 addr = dma_alloc_coherent(&ch->pdev->dev,
406 sdr->hwbuf_size * RCAR_DRIF_NUM_HWBUFS,
407 &ch->dma_handle, GFP_KERNEL);
408 if (!addr) {
409 rdrif_err(sdr,
410 "ch%u: dma alloc failed. num hwbufs %u size %u\n",
411 i, RCAR_DRIF_NUM_HWBUFS, sdr->hwbuf_size);
412 goto error;
413 }
414
415
416 for (j = 0; j < RCAR_DRIF_NUM_HWBUFS; j++) {
417 ch->buf[j].addr = addr + (j * sdr->hwbuf_size);
418 ch->buf[j].status = 0;
419 }
420 }
421 return 0;
422error:
423 return ret;
424}
425
426
427static int rcar_drif_queue_setup(struct vb2_queue *vq,
428 unsigned int *num_buffers, unsigned int *num_planes,
429 unsigned int sizes[], struct device *alloc_devs[])
430{
431 struct rcar_drif_sdr *sdr = vb2_get_drv_priv(vq);
432
433
434 if (vq->num_buffers + *num_buffers < 16)
435 *num_buffers = 16 - vq->num_buffers;
436
437 *num_planes = 1;
438 sizes[0] = PAGE_ALIGN(sdr->fmt->buffersize);
439 rdrif_dbg(sdr, "num_bufs %d sizes[0] %d\n", *num_buffers, sizes[0]);
440
441 return 0;
442}
443
444
445static void rcar_drif_buf_queue(struct vb2_buffer *vb)
446{
447 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
448 struct rcar_drif_sdr *sdr = vb2_get_drv_priv(vb->vb2_queue);
449 struct rcar_drif_frame_buf *fbuf =
450 container_of(vbuf, struct rcar_drif_frame_buf, vb);
451 unsigned long flags;
452
453 rdrif_dbg(sdr, "buf_queue idx %u\n", vb->index);
454 spin_lock_irqsave(&sdr->queued_bufs_lock, flags);
455 list_add_tail(&fbuf->list, &sdr->queued_bufs);
456 spin_unlock_irqrestore(&sdr->queued_bufs_lock, flags);
457}
458
459
460static struct rcar_drif_frame_buf *
461rcar_drif_get_fbuf(struct rcar_drif_sdr *sdr)
462{
463 struct rcar_drif_frame_buf *fbuf;
464 unsigned long flags;
465
466 spin_lock_irqsave(&sdr->queued_bufs_lock, flags);
467 fbuf = list_first_entry_or_null(&sdr->queued_bufs, struct
468 rcar_drif_frame_buf, list);
469 if (!fbuf) {
470
471
472
473
474 rdrif_dbg(sdr, "\napp late: prod %u\n", sdr->produced);
475 spin_unlock_irqrestore(&sdr->queued_bufs_lock, flags);
476 return NULL;
477 }
478 list_del(&fbuf->list);
479 spin_unlock_irqrestore(&sdr->queued_bufs_lock, flags);
480
481 return fbuf;
482}
483
484
485static inline bool rcar_drif_bufs_done(struct rcar_drif_hwbuf **buf)
486{
487 return (buf[0]->status & buf[1]->status & RCAR_DRIF_BUF_DONE);
488}
489
490static inline bool rcar_drif_bufs_overflow(struct rcar_drif_hwbuf **buf)
491{
492 return ((buf[0]->status | buf[1]->status) & RCAR_DRIF_BUF_OVERFLOW);
493}
494
495static inline void rcar_drif_bufs_clear(struct rcar_drif_hwbuf **buf,
496 unsigned int bit)
497{
498 unsigned int i;
499
500 for (i = 0; i < RCAR_DRIF_MAX_CHANNEL; i++)
501 buf[i]->status &= ~bit;
502}
503
504
505static void rcar_drif_channel_complete(struct rcar_drif *ch, u32 idx)
506{
507 u32 str;
508
509 ch->buf[idx].status |= RCAR_DRIF_BUF_DONE;
510
511
512 str = rcar_drif_read(ch, RCAR_DRIF_SISTR);
513 if (unlikely(str & RCAR_DRIF_RFOVF)) {
514
515 rcar_drif_write(ch, RCAR_DRIF_SISTR, str);
516
517
518 ch->buf[idx].status |= RCAR_DRIF_BUF_OVERFLOW;
519 }
520}
521
522
523static void rcar_drif_dma_complete(void *dma_async_param)
524{
525 struct rcar_drif *ch = dma_async_param;
526 struct rcar_drif_sdr *sdr = ch->sdr;
527 struct rcar_drif_hwbuf *buf[RCAR_DRIF_MAX_CHANNEL];
528 struct rcar_drif_frame_buf *fbuf;
529 bool overflow = false;
530 u32 idx, produced;
531 unsigned int i;
532
533 spin_lock(&sdr->dma_lock);
534
535
536 if (!vb2_is_streaming(&sdr->vb_queue)) {
537 spin_unlock(&sdr->dma_lock);
538 return;
539 }
540
541 idx = sdr->produced % RCAR_DRIF_NUM_HWBUFS;
542 rcar_drif_channel_complete(ch, idx);
543
544 if (sdr->num_cur_ch == RCAR_DRIF_MAX_CHANNEL) {
545 buf[0] = ch->num ? to_rcar_drif_buf_pair(sdr, ch->num, idx) :
546 &ch->buf[idx];
547 buf[1] = ch->num ? &ch->buf[idx] :
548 to_rcar_drif_buf_pair(sdr, ch->num, idx);
549
550
551 if (!rcar_drif_bufs_done(buf)) {
552 spin_unlock(&sdr->dma_lock);
553 return;
554 }
555
556
557 rcar_drif_bufs_clear(buf, RCAR_DRIF_BUF_DONE);
558
559 if (rcar_drif_bufs_overflow(buf)) {
560 overflow = true;
561
562 rcar_drif_bufs_clear(buf, RCAR_DRIF_BUF_OVERFLOW);
563 }
564 } else {
565 buf[0] = &ch->buf[idx];
566 if (buf[0]->status & RCAR_DRIF_BUF_OVERFLOW) {
567 overflow = true;
568
569 buf[0]->status &= ~RCAR_DRIF_BUF_OVERFLOW;
570 }
571 }
572
573
574 produced = sdr->produced++;
575 spin_unlock(&sdr->dma_lock);
576
577 rdrif_dbg(sdr, "ch%u: prod %u\n", ch->num, produced);
578
579
580 fbuf = rcar_drif_get_fbuf(sdr);
581 if (!fbuf)
582 return;
583
584 for (i = 0; i < RCAR_DRIF_MAX_CHANNEL; i++)
585 memcpy(vb2_plane_vaddr(&fbuf->vb.vb2_buf, 0) +
586 i * sdr->hwbuf_size, buf[i]->addr, sdr->hwbuf_size);
587
588 fbuf->vb.field = V4L2_FIELD_NONE;
589 fbuf->vb.sequence = produced;
590 fbuf->vb.vb2_buf.timestamp = ktime_get_ns();
591 vb2_set_plane_payload(&fbuf->vb.vb2_buf, 0, sdr->fmt->buffersize);
592
593
594 vb2_buffer_done(&fbuf->vb.vb2_buf,
595 overflow ? VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
596}
597
598static int rcar_drif_qbuf(struct rcar_drif *ch)
599{
600 struct rcar_drif_sdr *sdr = ch->sdr;
601 dma_addr_t addr = ch->dma_handle;
602 struct dma_async_tx_descriptor *rxd;
603 dma_cookie_t cookie;
604 int ret = -EIO;
605
606
607 rxd = dmaengine_prep_dma_cyclic(ch->dmach, addr,
608 sdr->hwbuf_size * RCAR_DRIF_NUM_HWBUFS,
609 sdr->hwbuf_size, DMA_DEV_TO_MEM,
610 DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
611 if (!rxd) {
612 rdrif_err(sdr, "ch%u: prep dma cyclic failed\n", ch->num);
613 return ret;
614 }
615
616
617 rxd->callback = rcar_drif_dma_complete;
618 rxd->callback_param = ch;
619 cookie = dmaengine_submit(rxd);
620 if (dma_submit_error(cookie)) {
621 rdrif_err(sdr, "ch%u: dma submit failed\n", ch->num);
622 return ret;
623 }
624
625 dma_async_issue_pending(ch->dmach);
626 return 0;
627}
628
629
630static int rcar_drif_enable_rx(struct rcar_drif_sdr *sdr)
631{
632 unsigned int i;
633 u32 ctr;
634 int ret = -EINVAL;
635
636
637
638
639
640
641
642 for_each_rcar_drif_channel(i, &sdr->cur_ch_mask) {
643 ctr = rcar_drif_read(sdr->ch[i], RCAR_DRIF_SICTR);
644 ctr |= (RCAR_DRIF_SICTR_RX_RISING_EDGE |
645 RCAR_DRIF_SICTR_RX_EN);
646 rcar_drif_write(sdr->ch[i], RCAR_DRIF_SICTR, ctr);
647 }
648
649
650 for_each_rcar_drif_channel(i, &sdr->cur_ch_mask) {
651 ret = readl_poll_timeout(sdr->ch[i]->base + RCAR_DRIF_SICTR,
652 ctr, ctr & RCAR_DRIF_SICTR_RX_EN, 7, 100000);
653 if (ret) {
654 rdrif_err(sdr, "ch%u: rx en failed. ctr 0x%08x\n", i,
655 rcar_drif_read(sdr->ch[i], RCAR_DRIF_SICTR));
656 break;
657 }
658 }
659 return ret;
660}
661
662
663static void rcar_drif_disable_rx(struct rcar_drif_sdr *sdr)
664{
665 unsigned int i;
666 u32 ctr;
667 int ret;
668
669
670 for_each_rcar_drif_channel(i, &sdr->cur_ch_mask) {
671 ctr = rcar_drif_read(sdr->ch[i], RCAR_DRIF_SICTR);
672 ctr &= ~RCAR_DRIF_SICTR_RX_EN;
673 rcar_drif_write(sdr->ch[i], RCAR_DRIF_SICTR, ctr);
674 }
675
676
677 for_each_rcar_drif_channel(i, &sdr->cur_ch_mask) {
678 ret = readl_poll_timeout(sdr->ch[i]->base + RCAR_DRIF_SICTR,
679 ctr, !(ctr & RCAR_DRIF_SICTR_RX_EN), 7, 100000);
680 if (ret)
681 dev_warn(&sdr->vdev->dev,
682 "ch%u: failed to disable rx. ctr 0x%08x\n",
683 i, rcar_drif_read(sdr->ch[i], RCAR_DRIF_SICTR));
684 }
685}
686
687
688static void rcar_drif_stop_channel(struct rcar_drif *ch)
689{
690
691 rcar_drif_write(ch, RCAR_DRIF_SIIER, 0x00000000);
692
693
694 dmaengine_terminate_sync(ch->dmach);
695}
696
697
698static void rcar_drif_stop(struct rcar_drif_sdr *sdr)
699{
700 unsigned int i;
701
702
703 rcar_drif_disable_rx(sdr);
704
705 for_each_rcar_drif_channel(i, &sdr->cur_ch_mask)
706 rcar_drif_stop_channel(sdr->ch[i]);
707}
708
709
710static int rcar_drif_start_channel(struct rcar_drif *ch)
711{
712 struct rcar_drif_sdr *sdr = ch->sdr;
713 u32 ctr, str;
714 int ret;
715
716
717 rcar_drif_write(ch, RCAR_DRIF_SICTR, RCAR_DRIF_SICTR_RESET);
718 ret = readl_poll_timeout(ch->base + RCAR_DRIF_SICTR, ctr,
719 !(ctr & RCAR_DRIF_SICTR_RESET), 7, 100000);
720 if (ret) {
721 rdrif_err(sdr, "ch%u: failed to reset rx. ctr 0x%08x\n",
722 ch->num, rcar_drif_read(ch, RCAR_DRIF_SICTR));
723 return ret;
724 }
725
726
727 ret = rcar_drif_qbuf(ch);
728 if (ret)
729 return ret;
730
731
732 str = RCAR_DRIF_RFFUL | RCAR_DRIF_REOF | RCAR_DRIF_RFSERR |
733 RCAR_DRIF_RFUDF | RCAR_DRIF_RFOVF;
734 rcar_drif_write(ch, RCAR_DRIF_SISTR, str);
735
736
737 rcar_drif_write(ch, RCAR_DRIF_SIIER, 0x00009000);
738
739 return ret;
740}
741
742
743static int rcar_drif_start(struct rcar_drif_sdr *sdr)
744{
745 unsigned long enabled = 0;
746 unsigned int i;
747 int ret;
748
749 for_each_rcar_drif_channel(i, &sdr->cur_ch_mask) {
750 ret = rcar_drif_start_channel(sdr->ch[i]);
751 if (ret)
752 goto start_error;
753 enabled |= BIT(i);
754 }
755
756 ret = rcar_drif_enable_rx(sdr);
757 if (ret)
758 goto enable_error;
759
760 sdr->produced = 0;
761 return ret;
762
763enable_error:
764 rcar_drif_disable_rx(sdr);
765start_error:
766 for_each_rcar_drif_channel(i, &enabled)
767 rcar_drif_stop_channel(sdr->ch[i]);
768
769 return ret;
770}
771
772
773static int rcar_drif_start_streaming(struct vb2_queue *vq, unsigned int count)
774{
775 struct rcar_drif_sdr *sdr = vb2_get_drv_priv(vq);
776 unsigned long enabled = 0;
777 unsigned int i;
778 int ret;
779
780 mutex_lock(&sdr->v4l2_mutex);
781
782 for_each_rcar_drif_channel(i, &sdr->cur_ch_mask) {
783 ret = clk_prepare_enable(sdr->ch[i]->clk);
784 if (ret)
785 goto error;
786 enabled |= BIT(i);
787 }
788
789
790 rcar_drif_set_mdr1(sdr);
791
792
793 ret = rcar_drif_set_format(sdr);
794 if (ret)
795 goto error;
796
797 if (sdr->num_cur_ch == RCAR_DRIF_MAX_CHANNEL)
798 sdr->hwbuf_size = sdr->fmt->buffersize / RCAR_DRIF_MAX_CHANNEL;
799 else
800 sdr->hwbuf_size = sdr->fmt->buffersize;
801
802 rdrif_dbg(sdr, "num hwbufs %u, hwbuf_size %u\n",
803 RCAR_DRIF_NUM_HWBUFS, sdr->hwbuf_size);
804
805
806 ret = rcar_drif_alloc_dmachannels(sdr);
807 if (ret)
808 goto error;
809
810
811 ret = rcar_drif_request_buf(sdr);
812 if (ret)
813 goto error;
814
815
816 ret = rcar_drif_start(sdr);
817 if (ret)
818 goto error;
819
820 mutex_unlock(&sdr->v4l2_mutex);
821
822 return ret;
823
824error:
825 rcar_drif_release_queued_bufs(sdr, VB2_BUF_STATE_QUEUED);
826 rcar_drif_release_buf(sdr);
827 rcar_drif_release_dmachannels(sdr);
828 for_each_rcar_drif_channel(i, &enabled)
829 clk_disable_unprepare(sdr->ch[i]->clk);
830
831 mutex_unlock(&sdr->v4l2_mutex);
832
833 return ret;
834}
835
836
837static void rcar_drif_stop_streaming(struct vb2_queue *vq)
838{
839 struct rcar_drif_sdr *sdr = vb2_get_drv_priv(vq);
840 unsigned int i;
841
842 mutex_lock(&sdr->v4l2_mutex);
843
844
845 rcar_drif_stop(sdr);
846
847
848 rcar_drif_release_queued_bufs(sdr, VB2_BUF_STATE_ERROR);
849
850
851 rcar_drif_release_buf(sdr);
852
853
854 rcar_drif_release_dmachannels(sdr);
855
856 for_each_rcar_drif_channel(i, &sdr->cur_ch_mask)
857 clk_disable_unprepare(sdr->ch[i]->clk);
858
859 mutex_unlock(&sdr->v4l2_mutex);
860}
861
862
863static const struct vb2_ops rcar_drif_vb2_ops = {
864 .queue_setup = rcar_drif_queue_setup,
865 .buf_queue = rcar_drif_buf_queue,
866 .start_streaming = rcar_drif_start_streaming,
867 .stop_streaming = rcar_drif_stop_streaming,
868 .wait_prepare = vb2_ops_wait_prepare,
869 .wait_finish = vb2_ops_wait_finish,
870};
871
872static int rcar_drif_querycap(struct file *file, void *fh,
873 struct v4l2_capability *cap)
874{
875 struct rcar_drif_sdr *sdr = video_drvdata(file);
876
877 strscpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver));
878 strscpy(cap->card, sdr->vdev->name, sizeof(cap->card));
879 snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
880 sdr->vdev->name);
881
882 return 0;
883}
884
885static int rcar_drif_set_default_format(struct rcar_drif_sdr *sdr)
886{
887 unsigned int i;
888
889 for (i = 0; i < ARRAY_SIZE(formats); i++) {
890
891 if (sdr->num_hw_ch == formats[i].num_ch) {
892 sdr->fmt = &formats[i];
893 sdr->cur_ch_mask = sdr->hw_ch_mask;
894 sdr->num_cur_ch = sdr->num_hw_ch;
895 dev_dbg(sdr->dev, "default fmt[%u]: mask %lu num %u\n",
896 i, sdr->cur_ch_mask, sdr->num_cur_ch);
897 return 0;
898 }
899 }
900 return -EINVAL;
901}
902
903static int rcar_drif_enum_fmt_sdr_cap(struct file *file, void *priv,
904 struct v4l2_fmtdesc *f)
905{
906 if (f->index >= ARRAY_SIZE(formats))
907 return -EINVAL;
908
909 f->pixelformat = formats[f->index].pixelformat;
910
911 return 0;
912}
913
914static int rcar_drif_g_fmt_sdr_cap(struct file *file, void *priv,
915 struct v4l2_format *f)
916{
917 struct rcar_drif_sdr *sdr = video_drvdata(file);
918
919 f->fmt.sdr.pixelformat = sdr->fmt->pixelformat;
920 f->fmt.sdr.buffersize = sdr->fmt->buffersize;
921
922 return 0;
923}
924
925static int rcar_drif_s_fmt_sdr_cap(struct file *file, void *priv,
926 struct v4l2_format *f)
927{
928 struct rcar_drif_sdr *sdr = video_drvdata(file);
929 struct vb2_queue *q = &sdr->vb_queue;
930 unsigned int i;
931
932 if (vb2_is_busy(q))
933 return -EBUSY;
934
935 for (i = 0; i < ARRAY_SIZE(formats); i++) {
936 if (formats[i].pixelformat == f->fmt.sdr.pixelformat)
937 break;
938 }
939
940 if (i == ARRAY_SIZE(formats))
941 i = 0;
942
943 sdr->fmt = &formats[i];
944 f->fmt.sdr.pixelformat = sdr->fmt->pixelformat;
945 f->fmt.sdr.buffersize = formats[i].buffersize;
946 memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
947
948
949
950
951
952 if (formats[i].num_ch < sdr->num_hw_ch) {
953 sdr->cur_ch_mask = BIT(0);
954 sdr->num_cur_ch = formats[i].num_ch;
955 } else {
956 sdr->cur_ch_mask = sdr->hw_ch_mask;
957 sdr->num_cur_ch = sdr->num_hw_ch;
958 }
959
960 rdrif_dbg(sdr, "cur: idx %u mask %lu num %u\n",
961 i, sdr->cur_ch_mask, sdr->num_cur_ch);
962
963 return 0;
964}
965
966static int rcar_drif_try_fmt_sdr_cap(struct file *file, void *priv,
967 struct v4l2_format *f)
968{
969 unsigned int i;
970
971 for (i = 0; i < ARRAY_SIZE(formats); i++) {
972 if (formats[i].pixelformat == f->fmt.sdr.pixelformat) {
973 f->fmt.sdr.buffersize = formats[i].buffersize;
974 return 0;
975 }
976 }
977
978 f->fmt.sdr.pixelformat = formats[0].pixelformat;
979 f->fmt.sdr.buffersize = formats[0].buffersize;
980 memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
981
982 return 0;
983}
984
985
986static int rcar_drif_enum_freq_bands(struct file *file, void *priv,
987 struct v4l2_frequency_band *band)
988{
989 struct rcar_drif_sdr *sdr = video_drvdata(file);
990
991 return v4l2_subdev_call(sdr->ep.subdev, tuner, enum_freq_bands, band);
992}
993
994static int rcar_drif_g_frequency(struct file *file, void *priv,
995 struct v4l2_frequency *f)
996{
997 struct rcar_drif_sdr *sdr = video_drvdata(file);
998
999 return v4l2_subdev_call(sdr->ep.subdev, tuner, g_frequency, f);
1000}
1001
1002static int rcar_drif_s_frequency(struct file *file, void *priv,
1003 const struct v4l2_frequency *f)
1004{
1005 struct rcar_drif_sdr *sdr = video_drvdata(file);
1006
1007 return v4l2_subdev_call(sdr->ep.subdev, tuner, s_frequency, f);
1008}
1009
1010static int rcar_drif_g_tuner(struct file *file, void *priv,
1011 struct v4l2_tuner *vt)
1012{
1013 struct rcar_drif_sdr *sdr = video_drvdata(file);
1014
1015 return v4l2_subdev_call(sdr->ep.subdev, tuner, g_tuner, vt);
1016}
1017
1018static int rcar_drif_s_tuner(struct file *file, void *priv,
1019 const struct v4l2_tuner *vt)
1020{
1021 struct rcar_drif_sdr *sdr = video_drvdata(file);
1022
1023 return v4l2_subdev_call(sdr->ep.subdev, tuner, s_tuner, vt);
1024}
1025
1026static const struct v4l2_ioctl_ops rcar_drif_ioctl_ops = {
1027 .vidioc_querycap = rcar_drif_querycap,
1028
1029 .vidioc_enum_fmt_sdr_cap = rcar_drif_enum_fmt_sdr_cap,
1030 .vidioc_g_fmt_sdr_cap = rcar_drif_g_fmt_sdr_cap,
1031 .vidioc_s_fmt_sdr_cap = rcar_drif_s_fmt_sdr_cap,
1032 .vidioc_try_fmt_sdr_cap = rcar_drif_try_fmt_sdr_cap,
1033
1034 .vidioc_reqbufs = vb2_ioctl_reqbufs,
1035 .vidioc_create_bufs = vb2_ioctl_create_bufs,
1036 .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
1037 .vidioc_querybuf = vb2_ioctl_querybuf,
1038 .vidioc_qbuf = vb2_ioctl_qbuf,
1039 .vidioc_dqbuf = vb2_ioctl_dqbuf,
1040
1041 .vidioc_streamon = vb2_ioctl_streamon,
1042 .vidioc_streamoff = vb2_ioctl_streamoff,
1043
1044 .vidioc_s_frequency = rcar_drif_s_frequency,
1045 .vidioc_g_frequency = rcar_drif_g_frequency,
1046 .vidioc_s_tuner = rcar_drif_s_tuner,
1047 .vidioc_g_tuner = rcar_drif_g_tuner,
1048 .vidioc_enum_freq_bands = rcar_drif_enum_freq_bands,
1049 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1050 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1051 .vidioc_log_status = v4l2_ctrl_log_status,
1052};
1053
1054static const struct v4l2_file_operations rcar_drif_fops = {
1055 .owner = THIS_MODULE,
1056 .open = v4l2_fh_open,
1057 .release = vb2_fop_release,
1058 .read = vb2_fop_read,
1059 .poll = vb2_fop_poll,
1060 .mmap = vb2_fop_mmap,
1061 .unlocked_ioctl = video_ioctl2,
1062};
1063
1064static int rcar_drif_sdr_register(struct rcar_drif_sdr *sdr)
1065{
1066 int ret;
1067
1068
1069 sdr->vdev = video_device_alloc();
1070 if (!sdr->vdev)
1071 return -ENOMEM;
1072
1073 snprintf(sdr->vdev->name, sizeof(sdr->vdev->name), "R-Car DRIF");
1074 sdr->vdev->fops = &rcar_drif_fops;
1075 sdr->vdev->ioctl_ops = &rcar_drif_ioctl_ops;
1076 sdr->vdev->release = video_device_release;
1077 sdr->vdev->lock = &sdr->v4l2_mutex;
1078 sdr->vdev->queue = &sdr->vb_queue;
1079 sdr->vdev->queue->lock = &sdr->vb_queue_mutex;
1080 sdr->vdev->ctrl_handler = &sdr->ctrl_hdl;
1081 sdr->vdev->v4l2_dev = &sdr->v4l2_dev;
1082 sdr->vdev->device_caps = V4L2_CAP_SDR_CAPTURE | V4L2_CAP_TUNER |
1083 V4L2_CAP_STREAMING | V4L2_CAP_READWRITE;
1084 video_set_drvdata(sdr->vdev, sdr);
1085
1086
1087 ret = video_register_device(sdr->vdev, VFL_TYPE_SDR, -1);
1088 if (ret) {
1089 video_device_release(sdr->vdev);
1090 sdr->vdev = NULL;
1091 dev_err(sdr->dev, "failed video_register_device (%d)\n", ret);
1092 }
1093
1094 return ret;
1095}
1096
1097static void rcar_drif_sdr_unregister(struct rcar_drif_sdr *sdr)
1098{
1099 video_unregister_device(sdr->vdev);
1100 sdr->vdev = NULL;
1101}
1102
1103
1104static int rcar_drif_notify_bound(struct v4l2_async_notifier *notifier,
1105 struct v4l2_subdev *subdev,
1106 struct v4l2_async_subdev *asd)
1107{
1108 struct rcar_drif_sdr *sdr =
1109 container_of(notifier, struct rcar_drif_sdr, notifier);
1110
1111 if (sdr->ep.asd.match.fwnode !=
1112 of_fwnode_handle(subdev->dev->of_node)) {
1113 rdrif_err(sdr, "subdev %s cannot bind\n", subdev->name);
1114 return -EINVAL;
1115 }
1116
1117 v4l2_set_subdev_hostdata(subdev, sdr);
1118 sdr->ep.subdev = subdev;
1119 rdrif_dbg(sdr, "bound asd %s\n", subdev->name);
1120
1121 return 0;
1122}
1123
1124
1125static void rcar_drif_notify_unbind(struct v4l2_async_notifier *notifier,
1126 struct v4l2_subdev *subdev,
1127 struct v4l2_async_subdev *asd)
1128{
1129 struct rcar_drif_sdr *sdr =
1130 container_of(notifier, struct rcar_drif_sdr, notifier);
1131
1132 if (sdr->ep.subdev != subdev) {
1133 rdrif_err(sdr, "subdev %s is not bound\n", subdev->name);
1134 return;
1135 }
1136
1137
1138 v4l2_ctrl_handler_free(&sdr->ctrl_hdl);
1139 sdr->v4l2_dev.ctrl_handler = NULL;
1140 sdr->ep.subdev = NULL;
1141
1142 rcar_drif_sdr_unregister(sdr);
1143 rdrif_dbg(sdr, "unbind asd %s\n", subdev->name);
1144}
1145
1146
1147static int rcar_drif_notify_complete(struct v4l2_async_notifier *notifier)
1148{
1149 struct rcar_drif_sdr *sdr =
1150 container_of(notifier, struct rcar_drif_sdr, notifier);
1151 int ret;
1152
1153
1154
1155
1156
1157
1158
1159 ret = v4l2_ctrl_handler_init(&sdr->ctrl_hdl, 10);
1160 if (ret)
1161 return -ENOMEM;
1162
1163 sdr->v4l2_dev.ctrl_handler = &sdr->ctrl_hdl;
1164 ret = v4l2_device_register_subdev_nodes(&sdr->v4l2_dev);
1165 if (ret) {
1166 rdrif_err(sdr, "failed: register subdev nodes ret %d\n", ret);
1167 goto error;
1168 }
1169
1170 ret = v4l2_ctrl_add_handler(&sdr->ctrl_hdl,
1171 sdr->ep.subdev->ctrl_handler, NULL, true);
1172 if (ret) {
1173 rdrif_err(sdr, "failed: ctrl add hdlr ret %d\n", ret);
1174 goto error;
1175 }
1176
1177 ret = rcar_drif_sdr_register(sdr);
1178 if (ret)
1179 goto error;
1180
1181 return ret;
1182
1183error:
1184 v4l2_ctrl_handler_free(&sdr->ctrl_hdl);
1185
1186 return ret;
1187}
1188
1189static const struct v4l2_async_notifier_operations rcar_drif_notify_ops = {
1190 .bound = rcar_drif_notify_bound,
1191 .unbind = rcar_drif_notify_unbind,
1192 .complete = rcar_drif_notify_complete,
1193};
1194
1195
1196static void rcar_drif_get_ep_properties(struct rcar_drif_sdr *sdr,
1197 struct fwnode_handle *fwnode)
1198{
1199 u32 val;
1200
1201
1202 sdr->mdr1 = RCAR_DRIF_SIRMDR1_SYNCMD_LR | RCAR_DRIF_SIRMDR1_MSB_FIRST |
1203 RCAR_DRIF_SIRMDR1_DTDL_1 | RCAR_DRIF_SIRMDR1_SYNCDL_0;
1204
1205
1206 if (!fwnode_property_read_u32(fwnode, "sync-active", &val))
1207 sdr->mdr1 |= val ? RCAR_DRIF_SIRMDR1_SYNCAC_POL_HIGH :
1208 RCAR_DRIF_SIRMDR1_SYNCAC_POL_LOW;
1209 else
1210 sdr->mdr1 |= RCAR_DRIF_SIRMDR1_SYNCAC_POL_HIGH;
1211
1212 dev_dbg(sdr->dev, "mdr1 0x%08x\n", sdr->mdr1);
1213}
1214
1215
1216static int rcar_drif_parse_subdevs(struct rcar_drif_sdr *sdr)
1217{
1218 struct v4l2_async_notifier *notifier = &sdr->notifier;
1219 struct fwnode_handle *fwnode, *ep;
1220
1221 notifier->subdevs = devm_kzalloc(sdr->dev, sizeof(*notifier->subdevs),
1222 GFP_KERNEL);
1223 if (!notifier->subdevs)
1224 return -ENOMEM;
1225
1226 ep = fwnode_graph_get_next_endpoint(of_fwnode_handle(sdr->dev->of_node),
1227 NULL);
1228 if (!ep)
1229 return 0;
1230
1231 notifier->subdevs[notifier->num_subdevs] = &sdr->ep.asd;
1232 fwnode = fwnode_graph_get_remote_port_parent(ep);
1233 if (!fwnode) {
1234 dev_warn(sdr->dev, "bad remote port parent\n");
1235 fwnode_handle_put(ep);
1236 return -EINVAL;
1237 }
1238
1239 sdr->ep.asd.match.fwnode = fwnode;
1240 sdr->ep.asd.match_type = V4L2_ASYNC_MATCH_FWNODE;
1241 notifier->num_subdevs++;
1242
1243
1244 rcar_drif_get_ep_properties(sdr, ep);
1245
1246 fwnode_handle_put(fwnode);
1247 fwnode_handle_put(ep);
1248
1249 return 0;
1250}
1251
1252
1253static bool rcar_drif_primary_bond(struct platform_device *pdev)
1254{
1255 return of_property_read_bool(pdev->dev.of_node, "renesas,primary-bond");
1256}
1257
1258
1259static struct device_node *rcar_drif_bond_enabled(struct platform_device *p)
1260{
1261 struct device_node *np;
1262
1263 np = of_parse_phandle(p->dev.of_node, "renesas,bonding", 0);
1264 if (np && of_device_is_available(np))
1265 return np;
1266
1267 return NULL;
1268}
1269
1270
1271static int rcar_drif_bond_available(struct rcar_drif_sdr *sdr,
1272 struct device_node *np)
1273{
1274 struct platform_device *pdev;
1275 struct rcar_drif *ch;
1276 int ret = 0;
1277
1278 pdev = of_find_device_by_node(np);
1279 if (!pdev) {
1280 dev_err(sdr->dev, "failed to get bonded device from node\n");
1281 return -ENODEV;
1282 }
1283
1284 device_lock(&pdev->dev);
1285 ch = platform_get_drvdata(pdev);
1286 if (ch) {
1287
1288 ch->sdr = sdr;
1289
1290
1291 sdr->ch[ch->num] = ch;
1292 sdr->hw_ch_mask |= BIT(ch->num);
1293 } else {
1294
1295 dev_info(sdr->dev, "defer probe\n");
1296 ret = -EPROBE_DEFER;
1297 }
1298 device_unlock(&pdev->dev);
1299
1300 put_device(&pdev->dev);
1301
1302 return ret;
1303}
1304
1305
1306static int rcar_drif_sdr_probe(struct rcar_drif_sdr *sdr)
1307{
1308 int ret;
1309
1310
1311 ret = rcar_drif_set_default_format(sdr);
1312 if (ret) {
1313 dev_err(sdr->dev, "failed to set default format\n");
1314 return ret;
1315 }
1316
1317
1318 sdr->hwbuf_size = RCAR_DRIF_DEFAULT_HWBUF_SIZE;
1319
1320 mutex_init(&sdr->v4l2_mutex);
1321 mutex_init(&sdr->vb_queue_mutex);
1322 spin_lock_init(&sdr->queued_bufs_lock);
1323 spin_lock_init(&sdr->dma_lock);
1324 INIT_LIST_HEAD(&sdr->queued_bufs);
1325
1326
1327 sdr->vb_queue.type = V4L2_BUF_TYPE_SDR_CAPTURE;
1328 sdr->vb_queue.io_modes = VB2_READ | VB2_MMAP | VB2_DMABUF;
1329 sdr->vb_queue.drv_priv = sdr;
1330 sdr->vb_queue.buf_struct_size = sizeof(struct rcar_drif_frame_buf);
1331 sdr->vb_queue.ops = &rcar_drif_vb2_ops;
1332 sdr->vb_queue.mem_ops = &vb2_vmalloc_memops;
1333 sdr->vb_queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1334
1335
1336 ret = vb2_queue_init(&sdr->vb_queue);
1337 if (ret) {
1338 dev_err(sdr->dev, "failed: vb2_queue_init ret %d\n", ret);
1339 return ret;
1340 }
1341
1342
1343 ret = v4l2_device_register(sdr->dev, &sdr->v4l2_dev);
1344 if (ret) {
1345 dev_err(sdr->dev, "failed: v4l2_device_register ret %d\n", ret);
1346 return ret;
1347 }
1348
1349
1350
1351
1352
1353 ret = rcar_drif_parse_subdevs(sdr);
1354 if (ret)
1355 goto error;
1356
1357 sdr->notifier.ops = &rcar_drif_notify_ops;
1358
1359
1360 ret = v4l2_async_notifier_register(&sdr->v4l2_dev, &sdr->notifier);
1361 if (ret < 0) {
1362 dev_err(sdr->dev, "failed: notifier register ret %d\n", ret);
1363 goto error;
1364 }
1365
1366 return ret;
1367
1368error:
1369 v4l2_device_unregister(&sdr->v4l2_dev);
1370
1371 return ret;
1372}
1373
1374
1375static void rcar_drif_sdr_remove(struct rcar_drif_sdr *sdr)
1376{
1377 v4l2_async_notifier_unregister(&sdr->notifier);
1378 v4l2_device_unregister(&sdr->v4l2_dev);
1379}
1380
1381
1382static int rcar_drif_probe(struct platform_device *pdev)
1383{
1384 struct rcar_drif_sdr *sdr;
1385 struct device_node *np;
1386 struct rcar_drif *ch;
1387 struct resource *res;
1388 int ret;
1389
1390
1391 ch = devm_kzalloc(&pdev->dev, sizeof(*ch), GFP_KERNEL);
1392 if (!ch)
1393 return -ENOMEM;
1394
1395 ch->pdev = pdev;
1396
1397
1398 ch->clk = devm_clk_get(&pdev->dev, "fck");
1399 if (IS_ERR(ch->clk)) {
1400 ret = PTR_ERR(ch->clk);
1401 dev_err(&pdev->dev, "clk get failed (%d)\n", ret);
1402 return ret;
1403 }
1404
1405
1406 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1407 ch->base = devm_ioremap_resource(&pdev->dev, res);
1408 if (IS_ERR(ch->base)) {
1409 ret = PTR_ERR(ch->base);
1410 dev_err(&pdev->dev, "ioremap failed (%d)\n", ret);
1411 return ret;
1412 }
1413 ch->start = res->start;
1414 platform_set_drvdata(pdev, ch);
1415
1416
1417 np = rcar_drif_bond_enabled(pdev);
1418 if (np) {
1419
1420 if (!rcar_drif_primary_bond(pdev)) {
1421 ch->num = 1;
1422 of_node_put(np);
1423 return 0;
1424 }
1425 }
1426
1427
1428 sdr = devm_kzalloc(&pdev->dev, sizeof(*sdr), GFP_KERNEL);
1429 if (!sdr) {
1430 of_node_put(np);
1431 return -ENOMEM;
1432 }
1433 ch->sdr = sdr;
1434 sdr->dev = &pdev->dev;
1435
1436
1437 sdr->ch[ch->num] = ch;
1438 sdr->hw_ch_mask = BIT(ch->num);
1439 if (np) {
1440
1441 ret = rcar_drif_bond_available(sdr, np);
1442 of_node_put(np);
1443 if (ret)
1444 return ret;
1445 }
1446 sdr->num_hw_ch = hweight_long(sdr->hw_ch_mask);
1447
1448 return rcar_drif_sdr_probe(sdr);
1449}
1450
1451
1452static int rcar_drif_remove(struct platform_device *pdev)
1453{
1454 struct rcar_drif *ch = platform_get_drvdata(pdev);
1455 struct rcar_drif_sdr *sdr = ch->sdr;
1456
1457
1458 if (ch->num)
1459 return 0;
1460
1461
1462 rcar_drif_sdr_remove(sdr);
1463
1464 return 0;
1465}
1466
1467
1468static int __maybe_unused rcar_drif_suspend(struct device *dev)
1469{
1470 return 0;
1471}
1472
1473static int __maybe_unused rcar_drif_resume(struct device *dev)
1474{
1475 return 0;
1476}
1477
1478static SIMPLE_DEV_PM_OPS(rcar_drif_pm_ops, rcar_drif_suspend,
1479 rcar_drif_resume);
1480
1481static const struct of_device_id rcar_drif_of_table[] = {
1482 { .compatible = "renesas,rcar-gen3-drif" },
1483 { }
1484};
1485MODULE_DEVICE_TABLE(of, rcar_drif_of_table);
1486
1487#define RCAR_DRIF_DRV_NAME "rcar_drif"
1488static struct platform_driver rcar_drif_driver = {
1489 .driver = {
1490 .name = RCAR_DRIF_DRV_NAME,
1491 .of_match_table = of_match_ptr(rcar_drif_of_table),
1492 .pm = &rcar_drif_pm_ops,
1493 },
1494 .probe = rcar_drif_probe,
1495 .remove = rcar_drif_remove,
1496};
1497
1498module_platform_driver(rcar_drif_driver);
1499
1500MODULE_DESCRIPTION("Renesas R-Car Gen3 DRIF driver");
1501MODULE_ALIAS("platform:" RCAR_DRIF_DRV_NAME);
1502MODULE_LICENSE("GPL v2");
1503MODULE_AUTHOR("Ramesh Shanmugasundaram <ramesh.shanmugasundaram@bp.renesas.com>");
1504