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