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Merge tag 'regmap-fix-v5.11-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux/fpc-iii.git] / drivers / media / platform / atmel / atmel-isi.c
blobd74aa73f26bea9be1f281a3a5d5bca6e4fbc0ab2
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (c) 2011 Atmel Corporation
4 * Josh Wu, <josh.wu@atmel.com>
5 *
6 * Based on previous work by Lars Haring, <lars.haring@atmel.com>
7 * and Sedji Gaouaou
8 * Based on the bttv driver for Bt848 with respective copyright holders
9 */
10
11 #include <linux/clk.h>
12 #include <linux/completion.h>
13 #include <linux/delay.h>
14 #include <linux/fs.h>
15 #include <linux/init.h>
16 #include <linux/interrupt.h>
17 #include <linux/kernel.h>
18 #include <linux/module.h>
19 #include <linux/of_graph.h>
20 #include <linux/platform_device.h>
21 #include <linux/pm_runtime.h>
22 #include <linux/slab.h>
23 #include <linux/of.h>
24
25 #include <linux/videodev2.h>
26 #include <media/v4l2-ctrls.h>
27 #include <media/v4l2-device.h>
28 #include <media/v4l2-dev.h>
29 #include <media/v4l2-ioctl.h>
30 #include <media/v4l2-event.h>
31 #include <media/v4l2-fwnode.h>
32 #include <media/videobuf2-dma-contig.h>
33 #include <media/v4l2-image-sizes.h>
34
35 #include "atmel-isi.h"
36
37 #define MAX_SUPPORT_WIDTH 2048U
38 #define MAX_SUPPORT_HEIGHT 2048U
39 #define MIN_FRAME_RATE 15
40 #define FRAME_INTERVAL_MILLI_SEC (1000 / MIN_FRAME_RATE)
41
42 /* Frame buffer descriptor */
43 struct fbd {
44 /* Physical address of the frame buffer */
45 u32 fb_address;
46 /* DMA Control Register(only in HISI2) */
47 u32 dma_ctrl;
48 /* Physical address of the next fbd */
49 u32 next_fbd_address;
50 };
51
52 static void set_dma_ctrl(struct fbd *fb_desc, u32 ctrl)
53 {
54 fb_desc->dma_ctrl = ctrl;
55 }
56
57 struct isi_dma_desc {
58 struct list_head list;
59 struct fbd *p_fbd;
60 dma_addr_t fbd_phys;
61 };
62
63 /* Frame buffer data */
64 struct frame_buffer {
65 struct vb2_v4l2_buffer vb;
66 struct isi_dma_desc *p_dma_desc;
67 struct list_head list;
68 };
69
70 struct isi_graph_entity {
71 struct device_node *node;
72
73 struct v4l2_async_subdev asd;
74 struct v4l2_subdev *subdev;
75 };
76
77 /*
78 * struct isi_format - ISI media bus format information
79 * @fourcc: Fourcc code for this format
80 * @mbus_code: V4L2 media bus format code.
81 * @bpp: Bytes per pixel (when stored in memory)
82 * @swap: Byte swap configuration value
83 * @support: Indicates format supported by subdev
84 * @skip: Skip duplicate format supported by subdev
85 */
86 struct isi_format {
87 u32 fourcc;
88 u32 mbus_code;
89 u8 bpp;
90 u32 swap;
91 };
92
93
94 struct atmel_isi {
95 /* Protects the access of variables shared with the ISR */
96 spinlock_t irqlock;
97 struct device *dev;
98 void __iomem *regs;
99
100 int sequence;
101
102 /* Allocate descriptors for dma buffer use */
103 struct fbd *p_fb_descriptors;
104 dma_addr_t fb_descriptors_phys;
105 struct list_head dma_desc_head;
106 struct isi_dma_desc dma_desc[VIDEO_MAX_FRAME];
107 bool enable_preview_path;
108
109 struct completion complete;
110 /* ISI peripheral clock */
111 struct clk *pclk;
112 unsigned int irq;
113
114 struct isi_platform_data pdata;
115 u16 width_flags; /* max 12 bits */
116
117 struct list_head video_buffer_list;
118 struct frame_buffer *active;
119
120 struct v4l2_device v4l2_dev;
121 struct video_device *vdev;
122 struct v4l2_async_notifier notifier;
123 struct isi_graph_entity entity;
124 struct v4l2_format fmt;
125
126 const struct isi_format **user_formats;
127 unsigned int num_user_formats;
128 const struct isi_format *current_fmt;
129
130 struct mutex lock;
131 struct vb2_queue queue;
132 };
133
134 #define notifier_to_isi(n) container_of(n, struct atmel_isi, notifier)
135
136 static void isi_writel(struct atmel_isi *isi, u32 reg, u32 val)
137 {
138 writel(val, isi->regs + reg);
139 }
140 static u32 isi_readl(struct atmel_isi *isi, u32 reg)
141 {
142 return readl(isi->regs + reg);
143 }
144
145 static void configure_geometry(struct atmel_isi *isi)
146 {
147 u32 cfg2, psize;
148 u32 fourcc = isi->current_fmt->fourcc;
149
150 isi->enable_preview_path = fourcc == V4L2_PIX_FMT_RGB565 ||
151 fourcc == V4L2_PIX_FMT_RGB32 ||
152 fourcc == V4L2_PIX_FMT_Y16;
153
154 /* According to sensor's output format to set cfg2 */
155 cfg2 = isi->current_fmt->swap;
156
157 isi_writel(isi, ISI_CTRL, ISI_CTRL_DIS);
158 /* Set width */
159 cfg2 |= ((isi->fmt.fmt.pix.width - 1) << ISI_CFG2_IM_HSIZE_OFFSET) &
160 ISI_CFG2_IM_HSIZE_MASK;
161 /* Set height */
162 cfg2 |= ((isi->fmt.fmt.pix.height - 1) << ISI_CFG2_IM_VSIZE_OFFSET)
163 & ISI_CFG2_IM_VSIZE_MASK;
164 isi_writel(isi, ISI_CFG2, cfg2);
165
166 /* No down sampling, preview size equal to sensor output size */
167 psize = ((isi->fmt.fmt.pix.width - 1) << ISI_PSIZE_PREV_HSIZE_OFFSET) &
168 ISI_PSIZE_PREV_HSIZE_MASK;
169 psize |= ((isi->fmt.fmt.pix.height - 1) << ISI_PSIZE_PREV_VSIZE_OFFSET) &
170 ISI_PSIZE_PREV_VSIZE_MASK;
171 isi_writel(isi, ISI_PSIZE, psize);
172 isi_writel(isi, ISI_PDECF, ISI_PDECF_NO_SAMPLING);
173 }
174
175 static irqreturn_t atmel_isi_handle_streaming(struct atmel_isi *isi)
176 {
177 if (isi->active) {
178 struct vb2_v4l2_buffer *vbuf = &isi->active->vb;
179 struct frame_buffer *buf = isi->active;
180
181 list_del_init(&buf->list);
182 vbuf->vb2_buf.timestamp = ktime_get_ns();
183 vbuf->sequence = isi->sequence++;
184 vbuf->field = V4L2_FIELD_NONE;
185 vb2_buffer_done(&vbuf->vb2_buf, VB2_BUF_STATE_DONE);
186 }
187
188 if (list_empty(&isi->video_buffer_list)) {
189 isi->active = NULL;
190 } else {
191 /* start next dma frame. */
192 isi->active = list_entry(isi->video_buffer_list.next,
193 struct frame_buffer, list);
194 if (!isi->enable_preview_path) {
195 isi_writel(isi, ISI_DMA_C_DSCR,
196 (u32)isi->active->p_dma_desc->fbd_phys);
197 isi_writel(isi, ISI_DMA_C_CTRL,
198 ISI_DMA_CTRL_FETCH | ISI_DMA_CTRL_DONE);
199 isi_writel(isi, ISI_DMA_CHER, ISI_DMA_CHSR_C_CH);
200 } else {
201 isi_writel(isi, ISI_DMA_P_DSCR,
202 (u32)isi->active->p_dma_desc->fbd_phys);
203 isi_writel(isi, ISI_DMA_P_CTRL,
204 ISI_DMA_CTRL_FETCH | ISI_DMA_CTRL_DONE);
205 isi_writel(isi, ISI_DMA_CHER, ISI_DMA_CHSR_P_CH);
206 }
207 }
208 return IRQ_HANDLED;
209 }
210
211 /* ISI interrupt service routine */
212 static irqreturn_t isi_interrupt(int irq, void *dev_id)
213 {
214 struct atmel_isi *isi = dev_id;
215 u32 status, mask, pending;
216 irqreturn_t ret = IRQ_NONE;
217
218 spin_lock(&isi->irqlock);
219
220 status = isi_readl(isi, ISI_STATUS);
221 mask = isi_readl(isi, ISI_INTMASK);
222 pending = status & mask;
223
224 if (pending & ISI_CTRL_SRST) {
225 complete(&isi->complete);
226 isi_writel(isi, ISI_INTDIS, ISI_CTRL_SRST);
227 ret = IRQ_HANDLED;
228 } else if (pending & ISI_CTRL_DIS) {
229 complete(&isi->complete);
230 isi_writel(isi, ISI_INTDIS, ISI_CTRL_DIS);
231 ret = IRQ_HANDLED;
232 } else {
233 if (likely(pending & ISI_SR_CXFR_DONE) ||
234 likely(pending & ISI_SR_PXFR_DONE))
235 ret = atmel_isi_handle_streaming(isi);
236 }
237
238 spin_unlock(&isi->irqlock);
239 return ret;
240 }
241
242 #define WAIT_ISI_RESET 1
243 #define WAIT_ISI_DISABLE 0
244 static int atmel_isi_wait_status(struct atmel_isi *isi, int wait_reset)
245 {
246 unsigned long timeout;
247 /*
248 * The reset or disable will only succeed if we have a
249 * pixel clock from the camera.
250 */
251 init_completion(&isi->complete);
252
253 if (wait_reset) {
254 isi_writel(isi, ISI_INTEN, ISI_CTRL_SRST);
255 isi_writel(isi, ISI_CTRL, ISI_CTRL_SRST);
256 } else {
257 isi_writel(isi, ISI_INTEN, ISI_CTRL_DIS);
258 isi_writel(isi, ISI_CTRL, ISI_CTRL_DIS);
259 }
260
261 timeout = wait_for_completion_timeout(&isi->complete,
262 msecs_to_jiffies(500));
263 if (timeout == 0)
264 return -ETIMEDOUT;
265
266 return 0;
267 }
268
269 /* ------------------------------------------------------------------
270 Videobuf operations
271 ------------------------------------------------------------------*/
272 static int queue_setup(struct vb2_queue *vq,
273 unsigned int *nbuffers, unsigned int *nplanes,
274 unsigned int sizes[], struct device *alloc_devs[])
275 {
276 struct atmel_isi *isi = vb2_get_drv_priv(vq);
277 unsigned long size;
278
279 size = isi->fmt.fmt.pix.sizeimage;
280
281 /* Make sure the image size is large enough. */
282 if (*nplanes)
283 return sizes[0] < size ? -EINVAL : 0;
284
285 *nplanes = 1;
286 sizes[0] = size;
287
288 isi->active = NULL;
289
290 dev_dbg(isi->dev, "%s, count=%d, size=%ld\n", __func__,
291 *nbuffers, size);
292
293 return 0;
294 }
295
296 static int buffer_init(struct vb2_buffer *vb)
297 {
298 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
299 struct frame_buffer *buf = container_of(vbuf, struct frame_buffer, vb);
300
301 buf->p_dma_desc = NULL;
302 INIT_LIST_HEAD(&buf->list);
303
304 return 0;
305 }
306
307 static int buffer_prepare(struct vb2_buffer *vb)
308 {
309 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
310 struct frame_buffer *buf = container_of(vbuf, struct frame_buffer, vb);
311 struct atmel_isi *isi = vb2_get_drv_priv(vb->vb2_queue);
312 unsigned long size;
313 struct isi_dma_desc *desc;
314
315 size = isi->fmt.fmt.pix.sizeimage;
316
317 if (vb2_plane_size(vb, 0) < size) {
318 dev_err(isi->dev, "%s data will not fit into plane (%lu < %lu)\n",
319 __func__, vb2_plane_size(vb, 0), size);
320 return -EINVAL;
321 }
322
323 vb2_set_plane_payload(vb, 0, size);
324
325 if (!buf->p_dma_desc) {
326 if (list_empty(&isi->dma_desc_head)) {
327 dev_err(isi->dev, "Not enough dma descriptors.\n");
328 return -EINVAL;
329 } else {
330 /* Get an available descriptor */
331 desc = list_entry(isi->dma_desc_head.next,
332 struct isi_dma_desc, list);
333 /* Delete the descriptor since now it is used */
334 list_del_init(&desc->list);
335
336 /* Initialize the dma descriptor */
337 desc->p_fbd->fb_address =
338 vb2_dma_contig_plane_dma_addr(vb, 0);
339 desc->p_fbd->next_fbd_address = 0;
340 set_dma_ctrl(desc->p_fbd, ISI_DMA_CTRL_WB);
341
342 buf->p_dma_desc = desc;
343 }
344 }
345 return 0;
346 }
347
348 static void buffer_cleanup(struct vb2_buffer *vb)
349 {
350 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
351 struct atmel_isi *isi = vb2_get_drv_priv(vb->vb2_queue);
352 struct frame_buffer *buf = container_of(vbuf, struct frame_buffer, vb);
353
354 /* This descriptor is available now and we add to head list */
355 if (buf->p_dma_desc)
356 list_add(&buf->p_dma_desc->list, &isi->dma_desc_head);
357 }
358
359 static void start_dma(struct atmel_isi *isi, struct frame_buffer *buffer)
360 {
361 u32 ctrl, cfg1;
362
363 cfg1 = isi_readl(isi, ISI_CFG1);
364 /* Enable irq: cxfr for the codec path, pxfr for the preview path */
365 isi_writel(isi, ISI_INTEN,
366 ISI_SR_CXFR_DONE | ISI_SR_PXFR_DONE);
367
368 /* Check if already in a frame */
369 if (!isi->enable_preview_path) {
370 if (isi_readl(isi, ISI_STATUS) & ISI_CTRL_CDC) {
371 dev_err(isi->dev, "Already in frame handling.\n");
372 return;
373 }
374
375 isi_writel(isi, ISI_DMA_C_DSCR,
376 (u32)buffer->p_dma_desc->fbd_phys);
377 isi_writel(isi, ISI_DMA_C_CTRL,
378 ISI_DMA_CTRL_FETCH | ISI_DMA_CTRL_DONE);
379 isi_writel(isi, ISI_DMA_CHER, ISI_DMA_CHSR_C_CH);
380 } else {
381 isi_writel(isi, ISI_DMA_P_DSCR,
382 (u32)buffer->p_dma_desc->fbd_phys);
383 isi_writel(isi, ISI_DMA_P_CTRL,
384 ISI_DMA_CTRL_FETCH | ISI_DMA_CTRL_DONE);
385 isi_writel(isi, ISI_DMA_CHER, ISI_DMA_CHSR_P_CH);
386 }
387
388 cfg1 &= ~ISI_CFG1_FRATE_DIV_MASK;
389 /* Enable linked list */
390 cfg1 |= isi->pdata.frate | ISI_CFG1_DISCR;
391
392 /* Enable ISI */
393 ctrl = ISI_CTRL_EN;
394
395 if (!isi->enable_preview_path)
396 ctrl |= ISI_CTRL_CDC;
397
398 isi_writel(isi, ISI_CTRL, ctrl);
399 isi_writel(isi, ISI_CFG1, cfg1);
400 }
401
402 static void buffer_queue(struct vb2_buffer *vb)
403 {
404 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
405 struct atmel_isi *isi = vb2_get_drv_priv(vb->vb2_queue);
406 struct frame_buffer *buf = container_of(vbuf, struct frame_buffer, vb);
407 unsigned long flags = 0;
408
409 spin_lock_irqsave(&isi->irqlock, flags);
410 list_add_tail(&buf->list, &isi->video_buffer_list);
411
412 if (!isi->active) {
413 isi->active = buf;
414 if (vb2_is_streaming(vb->vb2_queue))
415 start_dma(isi, buf);
416 }
417 spin_unlock_irqrestore(&isi->irqlock, flags);
418 }
419
420 static int start_streaming(struct vb2_queue *vq, unsigned int count)
421 {
422 struct atmel_isi *isi = vb2_get_drv_priv(vq);
423 struct frame_buffer *buf, *node;
424 int ret;
425
426 pm_runtime_get_sync(isi->dev);
427
428 /* Enable stream on the sub device */
429 ret = v4l2_subdev_call(isi->entity.subdev, video, s_stream, 1);
430 if (ret && ret != -ENOIOCTLCMD) {
431 dev_err(isi->dev, "stream on failed in subdev\n");
432 goto err_start_stream;
433 }
434
435 /* Reset ISI */
436 ret = atmel_isi_wait_status(isi, WAIT_ISI_RESET);
437 if (ret < 0) {
438 dev_err(isi->dev, "Reset ISI timed out\n");
439 goto err_reset;
440 }
441 /* Disable all interrupts */
442 isi_writel(isi, ISI_INTDIS, (u32)~0UL);
443
444 isi->sequence = 0;
445 configure_geometry(isi);
446
447 spin_lock_irq(&isi->irqlock);
448 /* Clear any pending interrupt */
449 isi_readl(isi, ISI_STATUS);
450
451 start_dma(isi, isi->active);
452 spin_unlock_irq(&isi->irqlock);
453
454 return 0;
455
456 err_reset:
457 v4l2_subdev_call(isi->entity.subdev, video, s_stream, 0);
458
459 err_start_stream:
460 pm_runtime_put(isi->dev);
461
462 spin_lock_irq(&isi->irqlock);
463 isi->active = NULL;
464 /* Release all active buffers */
465 list_for_each_entry_safe(buf, node, &isi->video_buffer_list, list) {
466 list_del_init(&buf->list);
467 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_QUEUED);
468 }
469 spin_unlock_irq(&isi->irqlock);
470
471 return ret;
472 }
473
474 /* abort streaming and wait for last buffer */
475 static void stop_streaming(struct vb2_queue *vq)
476 {
477 struct atmel_isi *isi = vb2_get_drv_priv(vq);
478 struct frame_buffer *buf, *node;
479 int ret = 0;
480 unsigned long timeout;
481
482 /* Disable stream on the sub device */
483 ret = v4l2_subdev_call(isi->entity.subdev, video, s_stream, 0);
484 if (ret && ret != -ENOIOCTLCMD)
485 dev_err(isi->dev, "stream off failed in subdev\n");
486
487 spin_lock_irq(&isi->irqlock);
488 isi->active = NULL;
489 /* Release all active buffers */
490 list_for_each_entry_safe(buf, node, &isi->video_buffer_list, list) {
491 list_del_init(&buf->list);
492 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
493 }
494 spin_unlock_irq(&isi->irqlock);
495
496 if (!isi->enable_preview_path) {
497 timeout = jiffies + (FRAME_INTERVAL_MILLI_SEC * HZ) / 1000;
498 /* Wait until the end of the current frame. */
499 while ((isi_readl(isi, ISI_STATUS) & ISI_CTRL_CDC) &&
500 time_before(jiffies, timeout))
501 msleep(1);
502
503 if (time_after(jiffies, timeout))
504 dev_err(isi->dev,
505 "Timeout waiting for finishing codec request\n");
506 }
507
508 /* Disable interrupts */
509 isi_writel(isi, ISI_INTDIS,
510 ISI_SR_CXFR_DONE | ISI_SR_PXFR_DONE);
511
512 /* Disable ISI and wait for it is done */
513 ret = atmel_isi_wait_status(isi, WAIT_ISI_DISABLE);
514 if (ret < 0)
515 dev_err(isi->dev, "Disable ISI timed out\n");
516
517 pm_runtime_put(isi->dev);
518 }
519
520 static const struct vb2_ops isi_video_qops = {
521 .queue_setup = queue_setup,
522 .buf_init = buffer_init,
523 .buf_prepare = buffer_prepare,
524 .buf_cleanup = buffer_cleanup,
525 .buf_queue = buffer_queue,
526 .start_streaming = start_streaming,
527 .stop_streaming = stop_streaming,
528 .wait_prepare = vb2_ops_wait_prepare,
529 .wait_finish = vb2_ops_wait_finish,
530 };
531
532 static int isi_g_fmt_vid_cap(struct file *file, void *priv,
533 struct v4l2_format *fmt)
534 {
535 struct atmel_isi *isi = video_drvdata(file);
536
537 *fmt = isi->fmt;
538
539 return 0;
540 }
541
542 static const struct isi_format *find_format_by_fourcc(struct atmel_isi *isi,
543 unsigned int fourcc)
544 {
545 unsigned int num_formats = isi->num_user_formats;
546 const struct isi_format *fmt;
547 unsigned int i;
548
549 for (i = 0; i < num_formats; i++) {
550 fmt = isi->user_formats[i];
551 if (fmt->fourcc == fourcc)
552 return fmt;
553 }
554
555 return NULL;
556 }
557
558 static void isi_try_fse(struct atmel_isi *isi, const struct isi_format *isi_fmt,
559 struct v4l2_subdev_pad_config *pad_cfg)
560 {
561 int ret;
562 struct v4l2_subdev_frame_size_enum fse = {
563 .code = isi_fmt->mbus_code,
564 .which = V4L2_SUBDEV_FORMAT_TRY,
565 };
566
567 ret = v4l2_subdev_call(isi->entity.subdev, pad, enum_frame_size,
568 pad_cfg, &fse);
569 /*
570 * Attempt to obtain format size from subdev. If not available,
571 * just use the maximum ISI can receive.
572 */
573 if (ret) {
574 pad_cfg->try_crop.width = MAX_SUPPORT_WIDTH;
575 pad_cfg->try_crop.height = MAX_SUPPORT_HEIGHT;
576 } else {
577 pad_cfg->try_crop.width = fse.max_width;
578 pad_cfg->try_crop.height = fse.max_height;
579 }
580 }
581
582 static int isi_try_fmt(struct atmel_isi *isi, struct v4l2_format *f,
583 const struct isi_format **current_fmt)
584 {
585 const struct isi_format *isi_fmt;
586 struct v4l2_pix_format *pixfmt = &f->fmt.pix;
587 struct v4l2_subdev_pad_config pad_cfg = {};
588 struct v4l2_subdev_format format = {
589 .which = V4L2_SUBDEV_FORMAT_TRY,
590 };
591 int ret;
592
593 isi_fmt = find_format_by_fourcc(isi, pixfmt->pixelformat);
594 if (!isi_fmt) {
595 isi_fmt = isi->user_formats[isi->num_user_formats - 1];
596 pixfmt->pixelformat = isi_fmt->fourcc;
597 }
598
599 /* Limit to Atmel ISI hardware capabilities */
600 pixfmt->width = clamp(pixfmt->width, 0U, MAX_SUPPORT_WIDTH);
601 pixfmt->height = clamp(pixfmt->height, 0U, MAX_SUPPORT_HEIGHT);
602
603 v4l2_fill_mbus_format(&format.format, pixfmt, isi_fmt->mbus_code);
604
605 isi_try_fse(isi, isi_fmt, &pad_cfg);
606
607 ret = v4l2_subdev_call(isi->entity.subdev, pad, set_fmt,
608 &pad_cfg, &format);
609 if (ret < 0)
610 return ret;
611
612 v4l2_fill_pix_format(pixfmt, &format.format);
613
614 pixfmt->field = V4L2_FIELD_NONE;
615 pixfmt->bytesperline = pixfmt->width * isi_fmt->bpp;
616 pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
617
618 if (current_fmt)
619 *current_fmt = isi_fmt;
620
621 return 0;
622 }
623
624 static int isi_set_fmt(struct atmel_isi *isi, struct v4l2_format *f)
625 {
626 struct v4l2_subdev_format format = {
627 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
628 };
629 const struct isi_format *current_fmt;
630 int ret;
631
632 ret = isi_try_fmt(isi, f, &current_fmt);
633 if (ret)
634 return ret;
635
636 v4l2_fill_mbus_format(&format.format, &f->fmt.pix,
637 current_fmt->mbus_code);
638 ret = v4l2_subdev_call(isi->entity.subdev, pad,
639 set_fmt, NULL, &format);
640 if (ret < 0)
641 return ret;
642
643 isi->fmt = *f;
644 isi->current_fmt = current_fmt;
645
646 return 0;
647 }
648
649 static int isi_s_fmt_vid_cap(struct file *file, void *priv,
650 struct v4l2_format *f)
651 {
652 struct atmel_isi *isi = video_drvdata(file);
653
654 if (vb2_is_streaming(&isi->queue))
655 return -EBUSY;
656
657 return isi_set_fmt(isi, f);
658 }
659
660 static int isi_try_fmt_vid_cap(struct file *file, void *priv,
661 struct v4l2_format *f)
662 {
663 struct atmel_isi *isi = video_drvdata(file);
664
665 return isi_try_fmt(isi, f, NULL);
666 }
667
668 static int isi_enum_fmt_vid_cap(struct file *file, void *priv,
669 struct v4l2_fmtdesc *f)
670 {
671 struct atmel_isi *isi = video_drvdata(file);
672
673 if (f->index >= isi->num_user_formats)
674 return -EINVAL;
675
676 f->pixelformat = isi->user_formats[f->index]->fourcc;
677 return 0;
678 }
679
680 static int isi_querycap(struct file *file, void *priv,
681 struct v4l2_capability *cap)
682 {
683 strscpy(cap->driver, "atmel-isi", sizeof(cap->driver));
684 strscpy(cap->card, "Atmel Image Sensor Interface", sizeof(cap->card));
685 strscpy(cap->bus_info, "platform:isi", sizeof(cap->bus_info));
686 return 0;
687 }
688
689 static int isi_enum_input(struct file *file, void *priv,
690 struct v4l2_input *i)
691 {
692 if (i->index != 0)
693 return -EINVAL;
694
695 i->type = V4L2_INPUT_TYPE_CAMERA;
696 strscpy(i->name, "Camera", sizeof(i->name));
697 return 0;
698 }
699
700 static int isi_g_input(struct file *file, void *priv, unsigned int *i)
701 {
702 *i = 0;
703 return 0;
704 }
705
706 static int isi_s_input(struct file *file, void *priv, unsigned int i)
707 {
708 if (i > 0)
709 return -EINVAL;
710 return 0;
711 }
712
713 static int isi_g_parm(struct file *file, void *fh, struct v4l2_streamparm *a)
714 {
715 struct atmel_isi *isi = video_drvdata(file);
716
717 return v4l2_g_parm_cap(video_devdata(file), isi->entity.subdev, a);
718 }
719
720 static int isi_s_parm(struct file *file, void *fh, struct v4l2_streamparm *a)
721 {
722 struct atmel_isi *isi = video_drvdata(file);
723
724 return v4l2_s_parm_cap(video_devdata(file), isi->entity.subdev, a);
725 }
726
727 static int isi_enum_framesizes(struct file *file, void *fh,
728 struct v4l2_frmsizeenum *fsize)
729 {
730 struct atmel_isi *isi = video_drvdata(file);
731 const struct isi_format *isi_fmt;
732 struct v4l2_subdev_frame_size_enum fse = {
733 .index = fsize->index,
734 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
735 };
736 int ret;
737
738 isi_fmt = find_format_by_fourcc(isi, fsize->pixel_format);
739 if (!isi_fmt)
740 return -EINVAL;
741
742 fse.code = isi_fmt->mbus_code;
743
744 ret = v4l2_subdev_call(isi->entity.subdev, pad, enum_frame_size,
745 NULL, &fse);
746 if (ret)
747 return ret;
748
749 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
750 fsize->discrete.width = fse.max_width;
751 fsize->discrete.height = fse.max_height;
752
753 return 0;
754 }
755
756 static int isi_enum_frameintervals(struct file *file, void *fh,
757 struct v4l2_frmivalenum *fival)
758 {
759 struct atmel_isi *isi = video_drvdata(file);
760 const struct isi_format *isi_fmt;
761 struct v4l2_subdev_frame_interval_enum fie = {
762 .index = fival->index,
763 .width = fival->width,
764 .height = fival->height,
765 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
766 };
767 int ret;
768
769 isi_fmt = find_format_by_fourcc(isi, fival->pixel_format);
770 if (!isi_fmt)
771 return -EINVAL;
772
773 fie.code = isi_fmt->mbus_code;
774
775 ret = v4l2_subdev_call(isi->entity.subdev, pad,
776 enum_frame_interval, NULL, &fie);
777 if (ret)
778 return ret;
779
780 fival->type = V4L2_FRMIVAL_TYPE_DISCRETE;
781 fival->discrete = fie.interval;
782
783 return 0;
784 }
785
786 static void isi_camera_set_bus_param(struct atmel_isi *isi)
787 {
788 u32 cfg1 = 0;
789
790 /* set bus param for ISI */
791 if (isi->pdata.hsync_act_low)
792 cfg1 |= ISI_CFG1_HSYNC_POL_ACTIVE_LOW;
793 if (isi->pdata.vsync_act_low)
794 cfg1 |= ISI_CFG1_VSYNC_POL_ACTIVE_LOW;
795 if (isi->pdata.pclk_act_falling)
796 cfg1 |= ISI_CFG1_PIXCLK_POL_ACTIVE_FALLING;
797 if (isi->pdata.has_emb_sync)
798 cfg1 |= ISI_CFG1_EMB_SYNC;
799 if (isi->pdata.full_mode)
800 cfg1 |= ISI_CFG1_FULL_MODE;
801
802 cfg1 |= ISI_CFG1_THMASK_BEATS_16;
803
804 /* Enable PM and peripheral clock before operate isi registers */
805 pm_runtime_get_sync(isi->dev);
806
807 isi_writel(isi, ISI_CTRL, ISI_CTRL_DIS);
808 isi_writel(isi, ISI_CFG1, cfg1);
809
810 pm_runtime_put(isi->dev);
811 }
812
813 /* -----------------------------------------------------------------------*/
814 static int atmel_isi_parse_dt(struct atmel_isi *isi,
815 struct platform_device *pdev)
816 {
817 struct device_node *np = pdev->dev.of_node;
818 struct v4l2_fwnode_endpoint ep = { .bus_type = 0 };
819 int err;
820
821 /* Default settings for ISI */
822 isi->pdata.full_mode = 1;
823 isi->pdata.frate = ISI_CFG1_FRATE_CAPTURE_ALL;
824
825 np = of_graph_get_next_endpoint(np, NULL);
826 if (!np) {
827 dev_err(&pdev->dev, "Could not find the endpoint\n");
828 return -EINVAL;
829 }
830
831 err = v4l2_fwnode_endpoint_parse(of_fwnode_handle(np), &ep);
832 of_node_put(np);
833 if (err) {
834 dev_err(&pdev->dev, "Could not parse the endpoint\n");
835 return err;
836 }
837
838 switch (ep.bus.parallel.bus_width) {
839 case 8:
840 isi->pdata.data_width_flags = ISI_DATAWIDTH_8;
841 break;
842 case 10:
843 isi->pdata.data_width_flags =
844 ISI_DATAWIDTH_8 | ISI_DATAWIDTH_10;
845 break;
846 default:
847 dev_err(&pdev->dev, "Unsupported bus width: %d\n",
848 ep.bus.parallel.bus_width);
849 return -EINVAL;
850 }
851
852 if (ep.bus.parallel.flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)
853 isi->pdata.hsync_act_low = true;
854 if (ep.bus.parallel.flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)
855 isi->pdata.vsync_act_low = true;
856 if (ep.bus.parallel.flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)
857 isi->pdata.pclk_act_falling = true;
858
859 if (ep.bus_type == V4L2_MBUS_BT656)
860 isi->pdata.has_emb_sync = true;
861
862 return 0;
863 }
864
865 static int isi_open(struct file *file)
866 {
867 struct atmel_isi *isi = video_drvdata(file);
868 struct v4l2_subdev *sd = isi->entity.subdev;
869 int ret;
870
871 if (mutex_lock_interruptible(&isi->lock))
872 return -ERESTARTSYS;
873
874 ret = v4l2_fh_open(file);
875 if (ret < 0)
876 goto unlock;
877
878 if (!v4l2_fh_is_singular_file(file))
879 goto fh_rel;
880
881 ret = v4l2_subdev_call(sd, core, s_power, 1);
882 if (ret < 0 && ret != -ENOIOCTLCMD)
883 goto fh_rel;
884
885 ret = isi_set_fmt(isi, &isi->fmt);
886 if (ret)
887 v4l2_subdev_call(sd, core, s_power, 0);
888 fh_rel:
889 if (ret)
890 v4l2_fh_release(file);
891 unlock:
892 mutex_unlock(&isi->lock);
893 return ret;
894 }
895
896 static int isi_release(struct file *file)
897 {
898 struct atmel_isi *isi = video_drvdata(file);
899 struct v4l2_subdev *sd = isi->entity.subdev;
900 bool fh_singular;
901 int ret;
902
903 mutex_lock(&isi->lock);
904
905 fh_singular = v4l2_fh_is_singular_file(file);
906
907 ret = _vb2_fop_release(file, NULL);
908
909 if (fh_singular)
910 v4l2_subdev_call(sd, core, s_power, 0);
911
912 mutex_unlock(&isi->lock);
913
914 return ret;
915 }
916
917 static const struct v4l2_ioctl_ops isi_ioctl_ops = {
918 .vidioc_querycap = isi_querycap,
919
920 .vidioc_try_fmt_vid_cap = isi_try_fmt_vid_cap,
921 .vidioc_g_fmt_vid_cap = isi_g_fmt_vid_cap,
922 .vidioc_s_fmt_vid_cap = isi_s_fmt_vid_cap,
923 .vidioc_enum_fmt_vid_cap = isi_enum_fmt_vid_cap,
924
925 .vidioc_enum_input = isi_enum_input,
926 .vidioc_g_input = isi_g_input,
927 .vidioc_s_input = isi_s_input,
928
929 .vidioc_g_parm = isi_g_parm,
930 .vidioc_s_parm = isi_s_parm,
931 .vidioc_enum_framesizes = isi_enum_framesizes,
932 .vidioc_enum_frameintervals = isi_enum_frameintervals,
933
934 .vidioc_reqbufs = vb2_ioctl_reqbufs,
935 .vidioc_create_bufs = vb2_ioctl_create_bufs,
936 .vidioc_querybuf = vb2_ioctl_querybuf,
937 .vidioc_qbuf = vb2_ioctl_qbuf,
938 .vidioc_dqbuf = vb2_ioctl_dqbuf,
939 .vidioc_expbuf = vb2_ioctl_expbuf,
940 .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
941 .vidioc_streamon = vb2_ioctl_streamon,
942 .vidioc_streamoff = vb2_ioctl_streamoff,
943
944 .vidioc_log_status = v4l2_ctrl_log_status,
945 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
946 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
947 };
948
949 static const struct v4l2_file_operations isi_fops = {
950 .owner = THIS_MODULE,
951 .unlocked_ioctl = video_ioctl2,
952 .open = isi_open,
953 .release = isi_release,
954 .poll = vb2_fop_poll,
955 .mmap = vb2_fop_mmap,
956 .read = vb2_fop_read,
957 };
958
959 static int isi_set_default_fmt(struct atmel_isi *isi)
960 {
961 struct v4l2_format f = {
962 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
963 .fmt.pix = {
964 .width = VGA_WIDTH,
965 .height = VGA_HEIGHT,
966 .field = V4L2_FIELD_NONE,
967 .pixelformat = isi->user_formats[0]->fourcc,
968 },
969 };
970 int ret;
971
972 ret = isi_try_fmt(isi, &f, NULL);
973 if (ret)
974 return ret;
975 isi->current_fmt = isi->user_formats[0];
976 isi->fmt = f;
977 return 0;
978 }
979
980 static const struct isi_format isi_formats[] = {
981 {
982 .fourcc = V4L2_PIX_FMT_YUYV,
983 .mbus_code = MEDIA_BUS_FMT_YUYV8_2X8,
984 .bpp = 2,
985 .swap = ISI_CFG2_YCC_SWAP_DEFAULT,
986 }, {
987 .fourcc = V4L2_PIX_FMT_YUYV,
988 .mbus_code = MEDIA_BUS_FMT_YVYU8_2X8,
989 .bpp = 2,
990 .swap = ISI_CFG2_YCC_SWAP_MODE_1,
991 }, {
992 .fourcc = V4L2_PIX_FMT_YUYV,
993 .mbus_code = MEDIA_BUS_FMT_UYVY8_2X8,
994 .bpp = 2,
995 .swap = ISI_CFG2_YCC_SWAP_MODE_2,
996 }, {
997 .fourcc = V4L2_PIX_FMT_YUYV,
998 .mbus_code = MEDIA_BUS_FMT_VYUY8_2X8,
999 .bpp = 2,
1000 .swap = ISI_CFG2_YCC_SWAP_MODE_3,
1001 }, {
1002 .fourcc = V4L2_PIX_FMT_RGB565,
1003 .mbus_code = MEDIA_BUS_FMT_YUYV8_2X8,
1004 .bpp = 2,
1005 .swap = ISI_CFG2_YCC_SWAP_MODE_2,
1006 }, {
1007 .fourcc = V4L2_PIX_FMT_RGB565,
1008 .mbus_code = MEDIA_BUS_FMT_YVYU8_2X8,
1009 .bpp = 2,
1010 .swap = ISI_CFG2_YCC_SWAP_MODE_3,
1011 }, {
1012 .fourcc = V4L2_PIX_FMT_RGB565,
1013 .mbus_code = MEDIA_BUS_FMT_UYVY8_2X8,
1014 .bpp = 2,
1015 .swap = ISI_CFG2_YCC_SWAP_DEFAULT,
1016 }, {
1017 .fourcc = V4L2_PIX_FMT_RGB565,
1018 .mbus_code = MEDIA_BUS_FMT_VYUY8_2X8,
1019 .bpp = 2,
1020 .swap = ISI_CFG2_YCC_SWAP_MODE_1,
1021 }, {
1022 .fourcc = V4L2_PIX_FMT_GREY,
1023 .mbus_code = MEDIA_BUS_FMT_Y10_1X10,
1024 .bpp = 1,
1025 .swap = ISI_CFG2_GS_MODE_2_PIXEL | ISI_CFG2_GRAYSCALE,
1026 }, {
1027 .fourcc = V4L2_PIX_FMT_Y16,
1028 .mbus_code = MEDIA_BUS_FMT_Y10_1X10,
1029 .bpp = 2,
1030 .swap = ISI_CFG2_GS_MODE_2_PIXEL | ISI_CFG2_GRAYSCALE,
1031 },
1032 };
1033
1034 static int isi_formats_init(struct atmel_isi *isi)
1035 {
1036 const struct isi_format *isi_fmts[ARRAY_SIZE(isi_formats)];
1037 unsigned int num_fmts = 0, i, j;
1038 struct v4l2_subdev *subdev = isi->entity.subdev;
1039 struct v4l2_subdev_mbus_code_enum mbus_code = {
1040 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
1041 };
1042
1043 while (!v4l2_subdev_call(subdev, pad, enum_mbus_code,
1044 NULL, &mbus_code)) {
1045 for (i = 0; i < ARRAY_SIZE(isi_formats); i++) {
1046 if (isi_formats[i].mbus_code != mbus_code.code)
1047 continue;
1048
1049 /* Code supported, have we got this fourcc yet? */
1050 for (j = 0; j < num_fmts; j++)
1051 if (isi_fmts[j]->fourcc == isi_formats[i].fourcc)
1052 /* Already available */
1053 break;
1054 if (j == num_fmts)
1055 /* new */
1056 isi_fmts[num_fmts++] = isi_formats + i;
1057 }
1058 mbus_code.index++;
1059 }
1060
1061 if (!num_fmts)
1062 return -ENXIO;
1063
1064 isi->num_user_formats = num_fmts;
1065 isi->user_formats = devm_kcalloc(isi->dev,
1066 num_fmts, sizeof(struct isi_format *),
1067 GFP_KERNEL);
1068 if (!isi->user_formats)
1069 return -ENOMEM;
1070
1071 memcpy(isi->user_formats, isi_fmts,
1072 num_fmts * sizeof(struct isi_format *));
1073 isi->current_fmt = isi->user_formats[0];
1074
1075 return 0;
1076 }
1077
1078 static int isi_graph_notify_complete(struct v4l2_async_notifier *notifier)
1079 {
1080 struct atmel_isi *isi = notifier_to_isi(notifier);
1081 int ret;
1082
1083 isi->vdev->ctrl_handler = isi->entity.subdev->ctrl_handler;
1084 ret = isi_formats_init(isi);
1085 if (ret) {
1086 dev_err(isi->dev, "No supported mediabus format found\n");
1087 return ret;
1088 }
1089 isi_camera_set_bus_param(isi);
1090
1091 ret = isi_set_default_fmt(isi);
1092 if (ret) {
1093 dev_err(isi->dev, "Could not set default format\n");
1094 return ret;
1095 }
1096
1097 ret = video_register_device(isi->vdev, VFL_TYPE_VIDEO, -1);
1098 if (ret) {
1099 dev_err(isi->dev, "Failed to register video device\n");
1100 return ret;
1101 }
1102
1103 dev_dbg(isi->dev, "Device registered as %s\n",
1104 video_device_node_name(isi->vdev));
1105 return 0;
1106 }
1107
1108 static void isi_graph_notify_unbind(struct v4l2_async_notifier *notifier,
1109 struct v4l2_subdev *sd,
1110 struct v4l2_async_subdev *asd)
1111 {
1112 struct atmel_isi *isi = notifier_to_isi(notifier);
1113
1114 dev_dbg(isi->dev, "Removing %s\n", video_device_node_name(isi->vdev));
1115
1116 /* Checks internally if vdev have been init or not */
1117 video_unregister_device(isi->vdev);
1118 }
1119
1120 static int isi_graph_notify_bound(struct v4l2_async_notifier *notifier,
1121 struct v4l2_subdev *subdev,
1122 struct v4l2_async_subdev *asd)
1123 {
1124 struct atmel_isi *isi = notifier_to_isi(notifier);
1125
1126 dev_dbg(isi->dev, "subdev %s bound\n", subdev->name);
1127
1128 isi->entity.subdev = subdev;
1129
1130 return 0;
1131 }
1132
1133 static const struct v4l2_async_notifier_operations isi_graph_notify_ops = {
1134 .bound = isi_graph_notify_bound,
1135 .unbind = isi_graph_notify_unbind,
1136 .complete = isi_graph_notify_complete,
1137 };
1138
1139 static int isi_graph_parse(struct atmel_isi *isi, struct device_node *node)
1140 {
1141 struct device_node *ep = NULL;
1142 struct device_node *remote;
1143
1144 ep = of_graph_get_next_endpoint(node, ep);
1145 if (!ep)
1146 return -EINVAL;
1147
1148 remote = of_graph_get_remote_port_parent(ep);
1149 of_node_put(ep);
1150 if (!remote)
1151 return -EINVAL;
1152
1153 /* Remote node to connect */
1154 isi->entity.node = remote;
1155 isi->entity.asd.match_type = V4L2_ASYNC_MATCH_FWNODE;
1156 isi->entity.asd.match.fwnode = of_fwnode_handle(remote);
1157 return 0;
1158 }
1159
1160 static int isi_graph_init(struct atmel_isi *isi)
1161 {
1162 int ret;
1163
1164 /* Parse the graph to extract a list of subdevice DT nodes. */
1165 ret = isi_graph_parse(isi, isi->dev->of_node);
1166 if (ret < 0) {
1167 dev_err(isi->dev, "Graph parsing failed\n");
1168 return ret;
1169 }
1170
1171 v4l2_async_notifier_init(&isi->notifier);
1172
1173 ret = v4l2_async_notifier_add_subdev(&isi->notifier, &isi->entity.asd);
1174 if (ret) {
1175 of_node_put(isi->entity.node);
1176 return ret;
1177 }
1178
1179 isi->notifier.ops = &isi_graph_notify_ops;
1180
1181 ret = v4l2_async_notifier_register(&isi->v4l2_dev, &isi->notifier);
1182 if (ret < 0) {
1183 dev_err(isi->dev, "Notifier registration failed\n");
1184 v4l2_async_notifier_cleanup(&isi->notifier);
1185 return ret;
1186 }
1187
1188 return 0;
1189 }
1190
1191
1192 static int atmel_isi_probe(struct platform_device *pdev)
1193 {
1194 int irq;
1195 struct atmel_isi *isi;
1196 struct vb2_queue *q;
1197 struct resource *regs;
1198 int ret, i;
1199
1200 isi = devm_kzalloc(&pdev->dev, sizeof(struct atmel_isi), GFP_KERNEL);
1201 if (!isi)
1202 return -ENOMEM;
1203
1204 isi->pclk = devm_clk_get(&pdev->dev, "isi_clk");
1205 if (IS_ERR(isi->pclk))
1206 return PTR_ERR(isi->pclk);
1207
1208 ret = atmel_isi_parse_dt(isi, pdev);
1209 if (ret)
1210 return ret;
1211
1212 isi->active = NULL;
1213 isi->dev = &pdev->dev;
1214 mutex_init(&isi->lock);
1215 spin_lock_init(&isi->irqlock);
1216 INIT_LIST_HEAD(&isi->video_buffer_list);
1217 INIT_LIST_HEAD(&isi->dma_desc_head);
1218
1219 q = &isi->queue;
1220
1221 /* Initialize the top-level structure */
1222 ret = v4l2_device_register(&pdev->dev, &isi->v4l2_dev);
1223 if (ret)
1224 return ret;
1225
1226 isi->vdev = video_device_alloc();
1227 if (!isi->vdev) {
1228 ret = -ENOMEM;
1229 goto err_vdev_alloc;
1230 }
1231
1232 /* video node */
1233 isi->vdev->fops = &isi_fops;
1234 isi->vdev->v4l2_dev = &isi->v4l2_dev;
1235 isi->vdev->queue = &isi->queue;
1236 strscpy(isi->vdev->name, KBUILD_MODNAME, sizeof(isi->vdev->name));
1237 isi->vdev->release = video_device_release;
1238 isi->vdev->ioctl_ops = &isi_ioctl_ops;
1239 isi->vdev->lock = &isi->lock;
1240 isi->vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING |
1241 V4L2_CAP_READWRITE;
1242 video_set_drvdata(isi->vdev, isi);
1243
1244 /* buffer queue */
1245 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1246 q->io_modes = VB2_MMAP | VB2_READ | VB2_DMABUF;
1247 q->lock = &isi->lock;
1248 q->drv_priv = isi;
1249 q->buf_struct_size = sizeof(struct frame_buffer);
1250 q->ops = &isi_video_qops;
1251 q->mem_ops = &vb2_dma_contig_memops;
1252 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1253 q->min_buffers_needed = 2;
1254 q->dev = &pdev->dev;
1255
1256 ret = vb2_queue_init(q);
1257 if (ret < 0) {
1258 dev_err(&pdev->dev, "failed to initialize VB2 queue\n");
1259 goto err_vb2_queue;
1260 }
1261 isi->p_fb_descriptors = dma_alloc_coherent(&pdev->dev,
1262 sizeof(struct fbd) * VIDEO_MAX_FRAME,
1263 &isi->fb_descriptors_phys,
1264 GFP_KERNEL);
1265 if (!isi->p_fb_descriptors) {
1266 dev_err(&pdev->dev, "Can't allocate descriptors!\n");
1267 ret = -ENOMEM;
1268 goto err_dma_alloc;
1269 }
1270
1271 for (i = 0; i < VIDEO_MAX_FRAME; i++) {
1272 isi->dma_desc[i].p_fbd = isi->p_fb_descriptors + i;
1273 isi->dma_desc[i].fbd_phys = isi->fb_descriptors_phys +
1274 i * sizeof(struct fbd);
1275 list_add(&isi->dma_desc[i].list, &isi->dma_desc_head);
1276 }
1277
1278 regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1279 isi->regs = devm_ioremap_resource(&pdev->dev, regs);
1280 if (IS_ERR(isi->regs)) {
1281 ret = PTR_ERR(isi->regs);
1282 goto err_ioremap;
1283 }
1284
1285 if (isi->pdata.data_width_flags & ISI_DATAWIDTH_8)
1286 isi->width_flags = 1 << 7;
1287 if (isi->pdata.data_width_flags & ISI_DATAWIDTH_10)
1288 isi->width_flags |= 1 << 9;
1289
1290 irq = platform_get_irq(pdev, 0);
1291 if (irq < 0) {
1292 ret = irq;
1293 goto err_req_irq;
1294 }
1295
1296 ret = devm_request_irq(&pdev->dev, irq, isi_interrupt, 0, "isi", isi);
1297 if (ret) {
1298 dev_err(&pdev->dev, "Unable to request irq %d\n", irq);
1299 goto err_req_irq;
1300 }
1301 isi->irq = irq;
1302
1303 ret = isi_graph_init(isi);
1304 if (ret < 0)
1305 goto err_req_irq;
1306
1307 pm_suspend_ignore_children(&pdev->dev, true);
1308 pm_runtime_enable(&pdev->dev);
1309 platform_set_drvdata(pdev, isi);
1310 return 0;
1311
1312 err_req_irq:
1313 err_ioremap:
1314 dma_free_coherent(&pdev->dev,
1315 sizeof(struct fbd) * VIDEO_MAX_FRAME,
1316 isi->p_fb_descriptors,
1317 isi->fb_descriptors_phys);
1318 err_dma_alloc:
1319 err_vb2_queue:
1320 video_device_release(isi->vdev);
1321 err_vdev_alloc:
1322 v4l2_device_unregister(&isi->v4l2_dev);
1323
1324 return ret;
1325 }
1326
1327 static int atmel_isi_remove(struct platform_device *pdev)
1328 {
1329 struct atmel_isi *isi = platform_get_drvdata(pdev);
1330
1331 dma_free_coherent(&pdev->dev,
1332 sizeof(struct fbd) * VIDEO_MAX_FRAME,
1333 isi->p_fb_descriptors,
1334 isi->fb_descriptors_phys);
1335 pm_runtime_disable(&pdev->dev);
1336 v4l2_async_notifier_unregister(&isi->notifier);
1337 v4l2_async_notifier_cleanup(&isi->notifier);
1338 v4l2_device_unregister(&isi->v4l2_dev);
1339
1340 return 0;
1341 }
1342
1343 #ifdef CONFIG_PM
1344 static int atmel_isi_runtime_suspend(struct device *dev)
1345 {
1346 struct atmel_isi *isi = dev_get_drvdata(dev);
1347
1348 clk_disable_unprepare(isi->pclk);
1349
1350 return 0;
1351 }
1352 static int atmel_isi_runtime_resume(struct device *dev)
1353 {
1354 struct atmel_isi *isi = dev_get_drvdata(dev);
1355
1356 return clk_prepare_enable(isi->pclk);
1357 }
1358 #endif /* CONFIG_PM */
1359
1360 static const struct dev_pm_ops atmel_isi_dev_pm_ops = {
1361 SET_RUNTIME_PM_OPS(atmel_isi_runtime_suspend,
1362 atmel_isi_runtime_resume, NULL)
1363 };
1364
1365 static const struct of_device_id atmel_isi_of_match[] = {
1366 { .compatible = "atmel,at91sam9g45-isi" },
1367 { }
1368 };
1369 MODULE_DEVICE_TABLE(of, atmel_isi_of_match);
1370
1371 static struct platform_driver atmel_isi_driver = {
1372 .driver = {
1373 .name = "atmel_isi",
1374 .of_match_table = of_match_ptr(atmel_isi_of_match),
1375 .pm = &atmel_isi_dev_pm_ops,
1376 },
1377 .probe = atmel_isi_probe,
1378 .remove = atmel_isi_remove,
1379 };
1380
1381 module_platform_driver(atmel_isi_driver);
1382
1383 MODULE_AUTHOR("Josh Wu <josh.wu@atmel.com>");
1384 MODULE_DESCRIPTION("The V4L2 driver for Atmel Linux");
1385 MODULE_LICENSE("GPL");
1386 MODULE_SUPPORTED_DEVICE("video");
Linux with added FPC-III support