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_subdev *subdev; |
74 | }; |
75 | |
76 | /* |
77 | * struct isi_format - ISI media bus format information |
78 | * @fourcc: Fourcc code for this format |
79 | * @mbus_code: V4L2 media bus format code. |
80 | * @bpp: Bytes per pixel (when stored in memory) |
81 | * @swap: Byte swap configuration value |
82 | * @support: Indicates format supported by subdev |
83 | * @skip: Skip duplicate format supported by subdev |
84 | */ |
85 | struct isi_format { |
86 | u32 fourcc; |
87 | u32 mbus_code; |
88 | u8 bpp; |
89 | u32 swap; |
90 | }; |
91 | |
92 | |
93 | struct atmel_isi { |
94 | /* Protects the access of variables shared with the ISR */ |
95 | spinlock_t irqlock; |
96 | struct device *dev; |
97 | void __iomem *regs; |
98 | |
99 | int sequence; |
100 | |
101 | /* Allocate descriptors for dma buffer use */ |
102 | struct fbd *p_fb_descriptors; |
103 | dma_addr_t fb_descriptors_phys; |
104 | struct list_head dma_desc_head; |
105 | struct isi_dma_desc dma_desc[VIDEO_MAX_FRAME]; |
106 | bool enable_preview_path; |
107 | |
108 | struct completion complete; |
109 | /* ISI peripheral clock */ |
110 | struct clk *pclk; |
111 | unsigned int irq; |
112 | |
113 | struct isi_platform_data pdata; |
114 | u16 width_flags; /* max 12 bits */ |
115 | |
116 | struct list_head video_buffer_list; |
117 | struct frame_buffer *active; |
118 | |
119 | struct v4l2_device v4l2_dev; |
120 | struct video_device *vdev; |
121 | struct v4l2_async_notifier notifier; |
122 | struct isi_graph_entity entity; |
123 | struct v4l2_format fmt; |
124 | |
125 | const struct isi_format **user_formats; |
126 | unsigned int num_user_formats; |
127 | const struct isi_format *current_fmt; |
128 | |
129 | struct mutex lock; |
130 | struct vb2_queue queue; |
131 | }; |
132 | |
133 | #define notifier_to_isi(n) container_of(n, struct atmel_isi, notifier) |
134 | |
135 | static void isi_writel(struct atmel_isi *isi, u32 reg, u32 val) |
136 | { |
137 | writel(val, addr: isi->regs + reg); |
138 | } |
139 | static u32 isi_readl(struct atmel_isi *isi, u32 reg) |
140 | { |
141 | return readl(addr: isi->regs + reg); |
142 | } |
143 | |
144 | static void configure_geometry(struct atmel_isi *isi) |
145 | { |
146 | u32 cfg2, psize; |
147 | u32 fourcc = isi->current_fmt->fourcc; |
148 | |
149 | isi->enable_preview_path = fourcc == V4L2_PIX_FMT_RGB565 || |
150 | fourcc == V4L2_PIX_FMT_RGB32 || |
151 | fourcc == V4L2_PIX_FMT_Y16; |
152 | |
153 | /* According to sensor's output format to set cfg2 */ |
154 | cfg2 = isi->current_fmt->swap; |
155 | |
156 | isi_writel(isi, ISI_CTRL, ISI_CTRL_DIS); |
157 | /* Set width */ |
158 | cfg2 |= ((isi->fmt.fmt.pix.width - 1) << ISI_CFG2_IM_HSIZE_OFFSET) & |
159 | ISI_CFG2_IM_HSIZE_MASK; |
160 | /* Set height */ |
161 | cfg2 |= ((isi->fmt.fmt.pix.height - 1) << ISI_CFG2_IM_VSIZE_OFFSET) |
162 | & ISI_CFG2_IM_VSIZE_MASK; |
163 | isi_writel(isi, ISI_CFG2, val: cfg2); |
164 | |
165 | /* No down sampling, preview size equal to sensor output size */ |
166 | psize = ((isi->fmt.fmt.pix.width - 1) << ISI_PSIZE_PREV_HSIZE_OFFSET) & |
167 | ISI_PSIZE_PREV_HSIZE_MASK; |
168 | psize |= ((isi->fmt.fmt.pix.height - 1) << ISI_PSIZE_PREV_VSIZE_OFFSET) & |
169 | ISI_PSIZE_PREV_VSIZE_MASK; |
170 | isi_writel(isi, ISI_PSIZE, val: psize); |
171 | isi_writel(isi, ISI_PDECF, ISI_PDECF_NO_SAMPLING); |
172 | } |
173 | |
174 | static irqreturn_t atmel_isi_handle_streaming(struct atmel_isi *isi) |
175 | { |
176 | if (isi->active) { |
177 | struct vb2_v4l2_buffer *vbuf = &isi->active->vb; |
178 | struct frame_buffer *buf = isi->active; |
179 | |
180 | list_del_init(entry: &buf->list); |
181 | vbuf->vb2_buf.timestamp = ktime_get_ns(); |
182 | vbuf->sequence = isi->sequence++; |
183 | vbuf->field = V4L2_FIELD_NONE; |
184 | vb2_buffer_done(vb: &vbuf->vb2_buf, state: VB2_BUF_STATE_DONE); |
185 | } |
186 | |
187 | if (list_empty(head: &isi->video_buffer_list)) { |
188 | isi->active = NULL; |
189 | } else { |
190 | /* start next dma frame. */ |
191 | isi->active = list_entry(isi->video_buffer_list.next, |
192 | struct frame_buffer, list); |
193 | if (!isi->enable_preview_path) { |
194 | isi_writel(isi, ISI_DMA_C_DSCR, |
195 | val: (u32)isi->active->p_dma_desc->fbd_phys); |
196 | isi_writel(isi, ISI_DMA_C_CTRL, |
197 | ISI_DMA_CTRL_FETCH | ISI_DMA_CTRL_DONE); |
198 | isi_writel(isi, ISI_DMA_CHER, ISI_DMA_CHSR_C_CH); |
199 | } else { |
200 | isi_writel(isi, ISI_DMA_P_DSCR, |
201 | val: (u32)isi->active->p_dma_desc->fbd_phys); |
202 | isi_writel(isi, ISI_DMA_P_CTRL, |
203 | ISI_DMA_CTRL_FETCH | ISI_DMA_CTRL_DONE); |
204 | isi_writel(isi, ISI_DMA_CHER, ISI_DMA_CHSR_P_CH); |
205 | } |
206 | } |
207 | return IRQ_HANDLED; |
208 | } |
209 | |
210 | /* ISI interrupt service routine */ |
211 | static irqreturn_t isi_interrupt(int irq, void *dev_id) |
212 | { |
213 | struct atmel_isi *isi = dev_id; |
214 | u32 status, mask, pending; |
215 | irqreturn_t ret = IRQ_NONE; |
216 | |
217 | spin_lock(lock: &isi->irqlock); |
218 | |
219 | status = isi_readl(isi, ISI_STATUS); |
220 | mask = isi_readl(isi, ISI_INTMASK); |
221 | pending = status & mask; |
222 | |
223 | if (pending & ISI_CTRL_SRST) { |
224 | complete(&isi->complete); |
225 | isi_writel(isi, ISI_INTDIS, ISI_CTRL_SRST); |
226 | ret = IRQ_HANDLED; |
227 | } else if (pending & ISI_CTRL_DIS) { |
228 | complete(&isi->complete); |
229 | isi_writel(isi, ISI_INTDIS, ISI_CTRL_DIS); |
230 | ret = IRQ_HANDLED; |
231 | } else { |
232 | if (likely(pending & ISI_SR_CXFR_DONE) || |
233 | likely(pending & ISI_SR_PXFR_DONE)) |
234 | ret = atmel_isi_handle_streaming(isi); |
235 | } |
236 | |
237 | spin_unlock(lock: &isi->irqlock); |
238 | return ret; |
239 | } |
240 | |
241 | #define WAIT_ISI_RESET 1 |
242 | #define WAIT_ISI_DISABLE 0 |
243 | static int atmel_isi_wait_status(struct atmel_isi *isi, int wait_reset) |
244 | { |
245 | unsigned long timeout; |
246 | /* |
247 | * The reset or disable will only succeed if we have a |
248 | * pixel clock from the camera. |
249 | */ |
250 | init_completion(x: &isi->complete); |
251 | |
252 | if (wait_reset) { |
253 | isi_writel(isi, ISI_INTEN, ISI_CTRL_SRST); |
254 | isi_writel(isi, ISI_CTRL, ISI_CTRL_SRST); |
255 | } else { |
256 | isi_writel(isi, ISI_INTEN, ISI_CTRL_DIS); |
257 | isi_writel(isi, ISI_CTRL, ISI_CTRL_DIS); |
258 | } |
259 | |
260 | timeout = wait_for_completion_timeout(x: &isi->complete, |
261 | timeout: msecs_to_jiffies(m: 500)); |
262 | if (timeout == 0) |
263 | return -ETIMEDOUT; |
264 | |
265 | return 0; |
266 | } |
267 | |
268 | /* ------------------------------------------------------------------ |
269 | Videobuf operations |
270 | ------------------------------------------------------------------*/ |
271 | static int queue_setup(struct vb2_queue *vq, |
272 | unsigned int *nbuffers, unsigned int *nplanes, |
273 | unsigned int sizes[], struct device *alloc_devs[]) |
274 | { |
275 | struct atmel_isi *isi = vb2_get_drv_priv(q: vq); |
276 | unsigned long size; |
277 | |
278 | size = isi->fmt.fmt.pix.sizeimage; |
279 | |
280 | /* Make sure the image size is large enough. */ |
281 | if (*nplanes) |
282 | return sizes[0] < size ? -EINVAL : 0; |
283 | |
284 | *nplanes = 1; |
285 | sizes[0] = size; |
286 | |
287 | isi->active = NULL; |
288 | |
289 | dev_dbg(isi->dev, "%s, count=%d, size=%ld\n" , __func__, |
290 | *nbuffers, size); |
291 | |
292 | return 0; |
293 | } |
294 | |
295 | static int buffer_init(struct vb2_buffer *vb) |
296 | { |
297 | struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); |
298 | struct frame_buffer *buf = container_of(vbuf, struct frame_buffer, vb); |
299 | |
300 | buf->p_dma_desc = NULL; |
301 | INIT_LIST_HEAD(list: &buf->list); |
302 | |
303 | return 0; |
304 | } |
305 | |
306 | static int buffer_prepare(struct vb2_buffer *vb) |
307 | { |
308 | struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); |
309 | struct frame_buffer *buf = container_of(vbuf, struct frame_buffer, vb); |
310 | struct atmel_isi *isi = vb2_get_drv_priv(q: vb->vb2_queue); |
311 | unsigned long size; |
312 | struct isi_dma_desc *desc; |
313 | |
314 | size = isi->fmt.fmt.pix.sizeimage; |
315 | |
316 | if (vb2_plane_size(vb, plane_no: 0) < size) { |
317 | dev_err(isi->dev, "%s data will not fit into plane (%lu < %lu)\n" , |
318 | __func__, vb2_plane_size(vb, 0), size); |
319 | return -EINVAL; |
320 | } |
321 | |
322 | vb2_set_plane_payload(vb, plane_no: 0, size); |
323 | |
324 | if (!buf->p_dma_desc) { |
325 | if (list_empty(head: &isi->dma_desc_head)) { |
326 | dev_err(isi->dev, "Not enough dma descriptors.\n" ); |
327 | return -EINVAL; |
328 | } else { |
329 | /* Get an available descriptor */ |
330 | desc = list_entry(isi->dma_desc_head.next, |
331 | struct isi_dma_desc, list); |
332 | /* Delete the descriptor since now it is used */ |
333 | list_del_init(entry: &desc->list); |
334 | |
335 | /* Initialize the dma descriptor */ |
336 | desc->p_fbd->fb_address = |
337 | vb2_dma_contig_plane_dma_addr(vb, plane_no: 0); |
338 | desc->p_fbd->next_fbd_address = 0; |
339 | set_dma_ctrl(fb_desc: desc->p_fbd, ISI_DMA_CTRL_WB); |
340 | |
341 | buf->p_dma_desc = desc; |
342 | } |
343 | } |
344 | return 0; |
345 | } |
346 | |
347 | static void buffer_cleanup(struct vb2_buffer *vb) |
348 | { |
349 | struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); |
350 | struct atmel_isi *isi = vb2_get_drv_priv(q: vb->vb2_queue); |
351 | struct frame_buffer *buf = container_of(vbuf, struct frame_buffer, vb); |
352 | |
353 | /* This descriptor is available now and we add to head list */ |
354 | if (buf->p_dma_desc) |
355 | list_add(new: &buf->p_dma_desc->list, head: &isi->dma_desc_head); |
356 | } |
357 | |
358 | static void start_dma(struct atmel_isi *isi, struct frame_buffer *buffer) |
359 | { |
360 | u32 ctrl, cfg1; |
361 | |
362 | cfg1 = isi_readl(isi, ISI_CFG1); |
363 | /* Enable irq: cxfr for the codec path, pxfr for the preview path */ |
364 | isi_writel(isi, ISI_INTEN, |
365 | ISI_SR_CXFR_DONE | ISI_SR_PXFR_DONE); |
366 | |
367 | /* Check if already in a frame */ |
368 | if (!isi->enable_preview_path) { |
369 | if (isi_readl(isi, ISI_STATUS) & ISI_CTRL_CDC) { |
370 | dev_err(isi->dev, "Already in frame handling.\n" ); |
371 | return; |
372 | } |
373 | |
374 | isi_writel(isi, ISI_DMA_C_DSCR, |
375 | val: (u32)buffer->p_dma_desc->fbd_phys); |
376 | isi_writel(isi, ISI_DMA_C_CTRL, |
377 | ISI_DMA_CTRL_FETCH | ISI_DMA_CTRL_DONE); |
378 | isi_writel(isi, ISI_DMA_CHER, ISI_DMA_CHSR_C_CH); |
379 | } else { |
380 | isi_writel(isi, ISI_DMA_P_DSCR, |
381 | val: (u32)buffer->p_dma_desc->fbd_phys); |
382 | isi_writel(isi, ISI_DMA_P_CTRL, |
383 | ISI_DMA_CTRL_FETCH | ISI_DMA_CTRL_DONE); |
384 | isi_writel(isi, ISI_DMA_CHER, ISI_DMA_CHSR_P_CH); |
385 | } |
386 | |
387 | cfg1 &= ~ISI_CFG1_FRATE_DIV_MASK; |
388 | /* Enable linked list */ |
389 | cfg1 |= isi->pdata.frate | ISI_CFG1_DISCR; |
390 | |
391 | /* Enable ISI */ |
392 | ctrl = ISI_CTRL_EN; |
393 | |
394 | if (!isi->enable_preview_path) |
395 | ctrl |= ISI_CTRL_CDC; |
396 | |
397 | isi_writel(isi, ISI_CTRL, val: ctrl); |
398 | isi_writel(isi, ISI_CFG1, val: cfg1); |
399 | } |
400 | |
401 | static void buffer_queue(struct vb2_buffer *vb) |
402 | { |
403 | struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); |
404 | struct atmel_isi *isi = vb2_get_drv_priv(q: vb->vb2_queue); |
405 | struct frame_buffer *buf = container_of(vbuf, struct frame_buffer, vb); |
406 | unsigned long flags = 0; |
407 | |
408 | spin_lock_irqsave(&isi->irqlock, flags); |
409 | list_add_tail(new: &buf->list, head: &isi->video_buffer_list); |
410 | |
411 | if (!isi->active) { |
412 | isi->active = buf; |
413 | if (vb2_is_streaming(q: vb->vb2_queue)) |
414 | start_dma(isi, buffer: buf); |
415 | } |
416 | spin_unlock_irqrestore(lock: &isi->irqlock, flags); |
417 | } |
418 | |
419 | static int start_streaming(struct vb2_queue *vq, unsigned int count) |
420 | { |
421 | struct atmel_isi *isi = vb2_get_drv_priv(q: vq); |
422 | struct frame_buffer *buf, *node; |
423 | int ret; |
424 | |
425 | ret = pm_runtime_resume_and_get(dev: isi->dev); |
426 | if (ret < 0) |
427 | return ret; |
428 | |
429 | /* Enable stream on the sub device */ |
430 | ret = v4l2_subdev_call(isi->entity.subdev, video, s_stream, 1); |
431 | if (ret && ret != -ENOIOCTLCMD) { |
432 | dev_err(isi->dev, "stream on failed in subdev\n" ); |
433 | goto err_start_stream; |
434 | } |
435 | |
436 | /* Reset ISI */ |
437 | ret = atmel_isi_wait_status(isi, WAIT_ISI_RESET); |
438 | if (ret < 0) { |
439 | dev_err(isi->dev, "Reset ISI timed out\n" ); |
440 | goto err_reset; |
441 | } |
442 | /* Disable all interrupts */ |
443 | isi_writel(isi, ISI_INTDIS, val: (u32)~0UL); |
444 | |
445 | isi->sequence = 0; |
446 | configure_geometry(isi); |
447 | |
448 | spin_lock_irq(lock: &isi->irqlock); |
449 | /* Clear any pending interrupt */ |
450 | isi_readl(isi, ISI_STATUS); |
451 | |
452 | start_dma(isi, buffer: isi->active); |
453 | spin_unlock_irq(lock: &isi->irqlock); |
454 | |
455 | return 0; |
456 | |
457 | err_reset: |
458 | v4l2_subdev_call(isi->entity.subdev, video, s_stream, 0); |
459 | |
460 | err_start_stream: |
461 | pm_runtime_put(dev: isi->dev); |
462 | |
463 | spin_lock_irq(lock: &isi->irqlock); |
464 | isi->active = NULL; |
465 | /* Release all active buffers */ |
466 | list_for_each_entry_safe(buf, node, &isi->video_buffer_list, list) { |
467 | list_del_init(entry: &buf->list); |
468 | vb2_buffer_done(vb: &buf->vb.vb2_buf, state: VB2_BUF_STATE_QUEUED); |
469 | } |
470 | spin_unlock_irq(lock: &isi->irqlock); |
471 | |
472 | return ret; |
473 | } |
474 | |
475 | /* abort streaming and wait for last buffer */ |
476 | static void stop_streaming(struct vb2_queue *vq) |
477 | { |
478 | struct atmel_isi *isi = vb2_get_drv_priv(q: vq); |
479 | struct frame_buffer *buf, *node; |
480 | int ret = 0; |
481 | unsigned long timeout; |
482 | |
483 | /* Disable stream on the sub device */ |
484 | ret = v4l2_subdev_call(isi->entity.subdev, video, s_stream, 0); |
485 | if (ret && ret != -ENOIOCTLCMD) |
486 | dev_err(isi->dev, "stream off failed in subdev\n" ); |
487 | |
488 | spin_lock_irq(lock: &isi->irqlock); |
489 | isi->active = NULL; |
490 | /* Release all active buffers */ |
491 | list_for_each_entry_safe(buf, node, &isi->video_buffer_list, list) { |
492 | list_del_init(entry: &buf->list); |
493 | vb2_buffer_done(vb: &buf->vb.vb2_buf, state: VB2_BUF_STATE_ERROR); |
494 | } |
495 | spin_unlock_irq(lock: &isi->irqlock); |
496 | |
497 | if (!isi->enable_preview_path) { |
498 | timeout = jiffies + (FRAME_INTERVAL_MILLI_SEC * HZ) / 1000; |
499 | /* Wait until the end of the current frame. */ |
500 | while ((isi_readl(isi, ISI_STATUS) & ISI_CTRL_CDC) && |
501 | time_before(jiffies, timeout)) |
502 | msleep(msecs: 1); |
503 | |
504 | if (time_after(jiffies, timeout)) |
505 | dev_err(isi->dev, |
506 | "Timeout waiting for finishing codec request\n" ); |
507 | } |
508 | |
509 | /* Disable interrupts */ |
510 | isi_writel(isi, ISI_INTDIS, |
511 | ISI_SR_CXFR_DONE | ISI_SR_PXFR_DONE); |
512 | |
513 | /* Disable ISI and wait for it is done */ |
514 | ret = atmel_isi_wait_status(isi, WAIT_ISI_DISABLE); |
515 | if (ret < 0) |
516 | dev_err(isi->dev, "Disable ISI timed out\n" ); |
517 | |
518 | pm_runtime_put(dev: isi->dev); |
519 | } |
520 | |
521 | static const struct vb2_ops isi_video_qops = { |
522 | .queue_setup = queue_setup, |
523 | .buf_init = buffer_init, |
524 | .buf_prepare = buffer_prepare, |
525 | .buf_cleanup = buffer_cleanup, |
526 | .buf_queue = buffer_queue, |
527 | .start_streaming = start_streaming, |
528 | .stop_streaming = stop_streaming, |
529 | .wait_prepare = vb2_ops_wait_prepare, |
530 | .wait_finish = vb2_ops_wait_finish, |
531 | }; |
532 | |
533 | static int isi_g_fmt_vid_cap(struct file *file, void *priv, |
534 | struct v4l2_format *fmt) |
535 | { |
536 | struct atmel_isi *isi = video_drvdata(file); |
537 | |
538 | *fmt = isi->fmt; |
539 | |
540 | return 0; |
541 | } |
542 | |
543 | static const struct isi_format *find_format_by_fourcc(struct atmel_isi *isi, |
544 | unsigned int fourcc) |
545 | { |
546 | unsigned int num_formats = isi->num_user_formats; |
547 | const struct isi_format *fmt; |
548 | unsigned int i; |
549 | |
550 | for (i = 0; i < num_formats; i++) { |
551 | fmt = isi->user_formats[i]; |
552 | if (fmt->fourcc == fourcc) |
553 | return fmt; |
554 | } |
555 | |
556 | return NULL; |
557 | } |
558 | |
559 | static void isi_try_fse(struct atmel_isi *isi, const struct isi_format *isi_fmt, |
560 | struct v4l2_subdev_state *sd_state) |
561 | { |
562 | struct v4l2_rect *try_crop = |
563 | v4l2_subdev_state_get_crop(sd_state, 0); |
564 | struct v4l2_subdev_frame_size_enum fse = { |
565 | .code = isi_fmt->mbus_code, |
566 | .which = V4L2_SUBDEV_FORMAT_TRY, |
567 | }; |
568 | int ret; |
569 | |
570 | ret = v4l2_subdev_call(isi->entity.subdev, pad, enum_frame_size, |
571 | sd_state, &fse); |
572 | /* |
573 | * Attempt to obtain format size from subdev. If not available, |
574 | * just use the maximum ISI can receive. |
575 | */ |
576 | if (ret) { |
577 | try_crop->width = MAX_SUPPORT_WIDTH; |
578 | try_crop->height = MAX_SUPPORT_HEIGHT; |
579 | } else { |
580 | try_crop->width = fse.max_width; |
581 | try_crop->height = fse.max_height; |
582 | } |
583 | } |
584 | |
585 | static int isi_try_fmt(struct atmel_isi *isi, struct v4l2_format *f, |
586 | const struct isi_format **current_fmt) |
587 | { |
588 | const struct isi_format *isi_fmt; |
589 | struct v4l2_pix_format *pixfmt = &f->fmt.pix; |
590 | struct v4l2_subdev_pad_config pad_cfg = {}; |
591 | struct v4l2_subdev_state pad_state = { |
592 | .sd = isi->entity.subdev, |
593 | .pads = &pad_cfg, |
594 | }; |
595 | struct v4l2_subdev_format format = { |
596 | .which = V4L2_SUBDEV_FORMAT_TRY, |
597 | }; |
598 | int ret; |
599 | |
600 | isi_fmt = find_format_by_fourcc(isi, fourcc: pixfmt->pixelformat); |
601 | if (!isi_fmt) { |
602 | isi_fmt = isi->user_formats[isi->num_user_formats - 1]; |
603 | pixfmt->pixelformat = isi_fmt->fourcc; |
604 | } |
605 | |
606 | /* Limit to Atmel ISI hardware capabilities */ |
607 | pixfmt->width = clamp(pixfmt->width, 0U, MAX_SUPPORT_WIDTH); |
608 | pixfmt->height = clamp(pixfmt->height, 0U, MAX_SUPPORT_HEIGHT); |
609 | |
610 | v4l2_fill_mbus_format(mbus_fmt: &format.format, pix_fmt: pixfmt, code: isi_fmt->mbus_code); |
611 | |
612 | isi_try_fse(isi, isi_fmt, sd_state: &pad_state); |
613 | |
614 | ret = v4l2_subdev_call(isi->entity.subdev, pad, set_fmt, |
615 | &pad_state, &format); |
616 | if (ret < 0) |
617 | return ret; |
618 | |
619 | v4l2_fill_pix_format(pix_fmt: pixfmt, mbus_fmt: &format.format); |
620 | |
621 | pixfmt->field = V4L2_FIELD_NONE; |
622 | pixfmt->bytesperline = pixfmt->width * isi_fmt->bpp; |
623 | pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height; |
624 | |
625 | if (current_fmt) |
626 | *current_fmt = isi_fmt; |
627 | |
628 | return 0; |
629 | } |
630 | |
631 | static int isi_set_fmt(struct atmel_isi *isi, struct v4l2_format *f) |
632 | { |
633 | struct v4l2_subdev_format format = { |
634 | .which = V4L2_SUBDEV_FORMAT_ACTIVE, |
635 | }; |
636 | const struct isi_format *current_fmt; |
637 | int ret; |
638 | |
639 | ret = isi_try_fmt(isi, f, current_fmt: ¤t_fmt); |
640 | if (ret) |
641 | return ret; |
642 | |
643 | v4l2_fill_mbus_format(mbus_fmt: &format.format, pix_fmt: &f->fmt.pix, |
644 | code: current_fmt->mbus_code); |
645 | ret = v4l2_subdev_call(isi->entity.subdev, pad, |
646 | set_fmt, NULL, &format); |
647 | if (ret < 0) |
648 | return ret; |
649 | |
650 | isi->fmt = *f; |
651 | isi->current_fmt = current_fmt; |
652 | |
653 | return 0; |
654 | } |
655 | |
656 | static int isi_s_fmt_vid_cap(struct file *file, void *priv, |
657 | struct v4l2_format *f) |
658 | { |
659 | struct atmel_isi *isi = video_drvdata(file); |
660 | |
661 | if (vb2_is_streaming(q: &isi->queue)) |
662 | return -EBUSY; |
663 | |
664 | return isi_set_fmt(isi, f); |
665 | } |
666 | |
667 | static int isi_try_fmt_vid_cap(struct file *file, void *priv, |
668 | struct v4l2_format *f) |
669 | { |
670 | struct atmel_isi *isi = video_drvdata(file); |
671 | |
672 | return isi_try_fmt(isi, f, NULL); |
673 | } |
674 | |
675 | static int isi_enum_fmt_vid_cap(struct file *file, void *priv, |
676 | struct v4l2_fmtdesc *f) |
677 | { |
678 | struct atmel_isi *isi = video_drvdata(file); |
679 | |
680 | if (f->index >= isi->num_user_formats) |
681 | return -EINVAL; |
682 | |
683 | f->pixelformat = isi->user_formats[f->index]->fourcc; |
684 | return 0; |
685 | } |
686 | |
687 | static int isi_querycap(struct file *file, void *priv, |
688 | struct v4l2_capability *cap) |
689 | { |
690 | strscpy(cap->driver, "atmel-isi" , sizeof(cap->driver)); |
691 | strscpy(cap->card, "Atmel Image Sensor Interface" , sizeof(cap->card)); |
692 | strscpy(cap->bus_info, "platform:isi" , sizeof(cap->bus_info)); |
693 | return 0; |
694 | } |
695 | |
696 | static int isi_enum_input(struct file *file, void *priv, |
697 | struct v4l2_input *i) |
698 | { |
699 | if (i->index != 0) |
700 | return -EINVAL; |
701 | |
702 | i->type = V4L2_INPUT_TYPE_CAMERA; |
703 | strscpy(i->name, "Camera" , sizeof(i->name)); |
704 | return 0; |
705 | } |
706 | |
707 | static int isi_g_input(struct file *file, void *priv, unsigned int *i) |
708 | { |
709 | *i = 0; |
710 | return 0; |
711 | } |
712 | |
713 | static int isi_s_input(struct file *file, void *priv, unsigned int i) |
714 | { |
715 | if (i > 0) |
716 | return -EINVAL; |
717 | return 0; |
718 | } |
719 | |
720 | static int isi_g_parm(struct file *file, void *fh, struct v4l2_streamparm *a) |
721 | { |
722 | struct atmel_isi *isi = video_drvdata(file); |
723 | |
724 | return v4l2_g_parm_cap(vdev: video_devdata(file), sd: isi->entity.subdev, a); |
725 | } |
726 | |
727 | static int isi_s_parm(struct file *file, void *fh, struct v4l2_streamparm *a) |
728 | { |
729 | struct atmel_isi *isi = video_drvdata(file); |
730 | |
731 | return v4l2_s_parm_cap(vdev: video_devdata(file), sd: isi->entity.subdev, a); |
732 | } |
733 | |
734 | static int isi_enum_framesizes(struct file *file, void *fh, |
735 | struct v4l2_frmsizeenum *fsize) |
736 | { |
737 | struct atmel_isi *isi = video_drvdata(file); |
738 | const struct isi_format *isi_fmt; |
739 | struct v4l2_subdev_frame_size_enum fse = { |
740 | .index = fsize->index, |
741 | .which = V4L2_SUBDEV_FORMAT_ACTIVE, |
742 | }; |
743 | int ret; |
744 | |
745 | isi_fmt = find_format_by_fourcc(isi, fourcc: fsize->pixel_format); |
746 | if (!isi_fmt) |
747 | return -EINVAL; |
748 | |
749 | fse.code = isi_fmt->mbus_code; |
750 | |
751 | ret = v4l2_subdev_call(isi->entity.subdev, pad, enum_frame_size, |
752 | NULL, &fse); |
753 | if (ret) |
754 | return ret; |
755 | |
756 | fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; |
757 | fsize->discrete.width = fse.max_width; |
758 | fsize->discrete.height = fse.max_height; |
759 | |
760 | return 0; |
761 | } |
762 | |
763 | static int isi_enum_frameintervals(struct file *file, void *fh, |
764 | struct v4l2_frmivalenum *fival) |
765 | { |
766 | struct atmel_isi *isi = video_drvdata(file); |
767 | const struct isi_format *isi_fmt; |
768 | struct v4l2_subdev_frame_interval_enum fie = { |
769 | .index = fival->index, |
770 | .width = fival->width, |
771 | .height = fival->height, |
772 | .which = V4L2_SUBDEV_FORMAT_ACTIVE, |
773 | }; |
774 | int ret; |
775 | |
776 | isi_fmt = find_format_by_fourcc(isi, fourcc: fival->pixel_format); |
777 | if (!isi_fmt) |
778 | return -EINVAL; |
779 | |
780 | fie.code = isi_fmt->mbus_code; |
781 | |
782 | ret = v4l2_subdev_call(isi->entity.subdev, pad, |
783 | enum_frame_interval, NULL, &fie); |
784 | if (ret) |
785 | return ret; |
786 | |
787 | fival->type = V4L2_FRMIVAL_TYPE_DISCRETE; |
788 | fival->discrete = fie.interval; |
789 | |
790 | return 0; |
791 | } |
792 | |
793 | static int isi_camera_set_bus_param(struct atmel_isi *isi) |
794 | { |
795 | u32 cfg1 = 0; |
796 | int ret; |
797 | |
798 | /* set bus param for ISI */ |
799 | if (isi->pdata.hsync_act_low) |
800 | cfg1 |= ISI_CFG1_HSYNC_POL_ACTIVE_LOW; |
801 | if (isi->pdata.vsync_act_low) |
802 | cfg1 |= ISI_CFG1_VSYNC_POL_ACTIVE_LOW; |
803 | if (isi->pdata.pclk_act_falling) |
804 | cfg1 |= ISI_CFG1_PIXCLK_POL_ACTIVE_FALLING; |
805 | if (isi->pdata.has_emb_sync) |
806 | cfg1 |= ISI_CFG1_EMB_SYNC; |
807 | if (isi->pdata.full_mode) |
808 | cfg1 |= ISI_CFG1_FULL_MODE; |
809 | |
810 | cfg1 |= ISI_CFG1_THMASK_BEATS_16; |
811 | |
812 | /* Enable PM and peripheral clock before operate isi registers */ |
813 | ret = pm_runtime_resume_and_get(dev: isi->dev); |
814 | if (ret < 0) |
815 | return ret; |
816 | |
817 | isi_writel(isi, ISI_CTRL, ISI_CTRL_DIS); |
818 | isi_writel(isi, ISI_CFG1, val: cfg1); |
819 | |
820 | pm_runtime_put(dev: isi->dev); |
821 | |
822 | return 0; |
823 | } |
824 | |
825 | /* -----------------------------------------------------------------------*/ |
826 | static int atmel_isi_parse_dt(struct atmel_isi *isi, |
827 | struct platform_device *pdev) |
828 | { |
829 | struct device_node *np = pdev->dev.of_node; |
830 | struct v4l2_fwnode_endpoint ep = { .bus_type = 0 }; |
831 | int err; |
832 | |
833 | /* Default settings for ISI */ |
834 | isi->pdata.full_mode = 1; |
835 | isi->pdata.frate = ISI_CFG1_FRATE_CAPTURE_ALL; |
836 | |
837 | np = of_graph_get_endpoint_by_regs(parent: np, port_reg: 0, reg: -1); |
838 | if (!np) { |
839 | dev_err(&pdev->dev, "Could not find the endpoint\n" ); |
840 | return -EINVAL; |
841 | } |
842 | |
843 | err = v4l2_fwnode_endpoint_parse(of_fwnode_handle(np), vep: &ep); |
844 | of_node_put(node: np); |
845 | if (err) { |
846 | dev_err(&pdev->dev, "Could not parse the endpoint\n" ); |
847 | return err; |
848 | } |
849 | |
850 | switch (ep.bus.parallel.bus_width) { |
851 | case 8: |
852 | isi->pdata.data_width_flags = ISI_DATAWIDTH_8; |
853 | break; |
854 | case 10: |
855 | isi->pdata.data_width_flags = |
856 | ISI_DATAWIDTH_8 | ISI_DATAWIDTH_10; |
857 | break; |
858 | default: |
859 | dev_err(&pdev->dev, "Unsupported bus width: %d\n" , |
860 | ep.bus.parallel.bus_width); |
861 | return -EINVAL; |
862 | } |
863 | |
864 | if (ep.bus.parallel.flags & V4L2_MBUS_HSYNC_ACTIVE_LOW) |
865 | isi->pdata.hsync_act_low = true; |
866 | if (ep.bus.parallel.flags & V4L2_MBUS_VSYNC_ACTIVE_LOW) |
867 | isi->pdata.vsync_act_low = true; |
868 | if (ep.bus.parallel.flags & V4L2_MBUS_PCLK_SAMPLE_FALLING) |
869 | isi->pdata.pclk_act_falling = true; |
870 | |
871 | if (ep.bus_type == V4L2_MBUS_BT656) |
872 | isi->pdata.has_emb_sync = true; |
873 | |
874 | return 0; |
875 | } |
876 | |
877 | static int isi_open(struct file *file) |
878 | { |
879 | struct atmel_isi *isi = video_drvdata(file); |
880 | struct v4l2_subdev *sd = isi->entity.subdev; |
881 | int ret; |
882 | |
883 | if (mutex_lock_interruptible(&isi->lock)) |
884 | return -ERESTARTSYS; |
885 | |
886 | ret = v4l2_fh_open(filp: file); |
887 | if (ret < 0) |
888 | goto unlock; |
889 | |
890 | if (!v4l2_fh_is_singular_file(filp: file)) |
891 | goto fh_rel; |
892 | |
893 | ret = v4l2_subdev_call(sd, core, s_power, 1); |
894 | if (ret < 0 && ret != -ENOIOCTLCMD) |
895 | goto fh_rel; |
896 | |
897 | ret = isi_set_fmt(isi, f: &isi->fmt); |
898 | if (ret) |
899 | v4l2_subdev_call(sd, core, s_power, 0); |
900 | fh_rel: |
901 | if (ret) |
902 | v4l2_fh_release(filp: file); |
903 | unlock: |
904 | mutex_unlock(lock: &isi->lock); |
905 | return ret; |
906 | } |
907 | |
908 | static int isi_release(struct file *file) |
909 | { |
910 | struct atmel_isi *isi = video_drvdata(file); |
911 | struct v4l2_subdev *sd = isi->entity.subdev; |
912 | bool fh_singular; |
913 | int ret; |
914 | |
915 | mutex_lock(&isi->lock); |
916 | |
917 | fh_singular = v4l2_fh_is_singular_file(filp: file); |
918 | |
919 | ret = _vb2_fop_release(file, NULL); |
920 | |
921 | if (fh_singular) |
922 | v4l2_subdev_call(sd, core, s_power, 0); |
923 | |
924 | mutex_unlock(lock: &isi->lock); |
925 | |
926 | return ret; |
927 | } |
928 | |
929 | static const struct v4l2_ioctl_ops isi_ioctl_ops = { |
930 | .vidioc_querycap = isi_querycap, |
931 | |
932 | .vidioc_try_fmt_vid_cap = isi_try_fmt_vid_cap, |
933 | .vidioc_g_fmt_vid_cap = isi_g_fmt_vid_cap, |
934 | .vidioc_s_fmt_vid_cap = isi_s_fmt_vid_cap, |
935 | .vidioc_enum_fmt_vid_cap = isi_enum_fmt_vid_cap, |
936 | |
937 | .vidioc_enum_input = isi_enum_input, |
938 | .vidioc_g_input = isi_g_input, |
939 | .vidioc_s_input = isi_s_input, |
940 | |
941 | .vidioc_g_parm = isi_g_parm, |
942 | .vidioc_s_parm = isi_s_parm, |
943 | .vidioc_enum_framesizes = isi_enum_framesizes, |
944 | .vidioc_enum_frameintervals = isi_enum_frameintervals, |
945 | |
946 | .vidioc_reqbufs = vb2_ioctl_reqbufs, |
947 | .vidioc_create_bufs = vb2_ioctl_create_bufs, |
948 | .vidioc_querybuf = vb2_ioctl_querybuf, |
949 | .vidioc_qbuf = vb2_ioctl_qbuf, |
950 | .vidioc_dqbuf = vb2_ioctl_dqbuf, |
951 | .vidioc_expbuf = vb2_ioctl_expbuf, |
952 | .vidioc_prepare_buf = vb2_ioctl_prepare_buf, |
953 | .vidioc_streamon = vb2_ioctl_streamon, |
954 | .vidioc_streamoff = vb2_ioctl_streamoff, |
955 | |
956 | .vidioc_log_status = v4l2_ctrl_log_status, |
957 | .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, |
958 | .vidioc_unsubscribe_event = v4l2_event_unsubscribe, |
959 | }; |
960 | |
961 | static const struct v4l2_file_operations isi_fops = { |
962 | .owner = THIS_MODULE, |
963 | .unlocked_ioctl = video_ioctl2, |
964 | .open = isi_open, |
965 | .release = isi_release, |
966 | .poll = vb2_fop_poll, |
967 | .mmap = vb2_fop_mmap, |
968 | .read = vb2_fop_read, |
969 | }; |
970 | |
971 | static int isi_set_default_fmt(struct atmel_isi *isi) |
972 | { |
973 | struct v4l2_format f = { |
974 | .type = V4L2_BUF_TYPE_VIDEO_CAPTURE, |
975 | .fmt.pix = { |
976 | .width = VGA_WIDTH, |
977 | .height = VGA_HEIGHT, |
978 | .field = V4L2_FIELD_NONE, |
979 | .pixelformat = isi->user_formats[0]->fourcc, |
980 | }, |
981 | }; |
982 | int ret; |
983 | |
984 | ret = isi_try_fmt(isi, f: &f, NULL); |
985 | if (ret) |
986 | return ret; |
987 | isi->current_fmt = isi->user_formats[0]; |
988 | isi->fmt = f; |
989 | return 0; |
990 | } |
991 | |
992 | static const struct isi_format isi_formats[] = { |
993 | { |
994 | .fourcc = V4L2_PIX_FMT_YUYV, |
995 | .mbus_code = MEDIA_BUS_FMT_YUYV8_2X8, |
996 | .bpp = 2, |
997 | .swap = ISI_CFG2_YCC_SWAP_DEFAULT, |
998 | }, { |
999 | .fourcc = V4L2_PIX_FMT_YUYV, |
1000 | .mbus_code = MEDIA_BUS_FMT_YVYU8_2X8, |
1001 | .bpp = 2, |
1002 | .swap = ISI_CFG2_YCC_SWAP_MODE_1, |
1003 | }, { |
1004 | .fourcc = V4L2_PIX_FMT_YUYV, |
1005 | .mbus_code = MEDIA_BUS_FMT_UYVY8_2X8, |
1006 | .bpp = 2, |
1007 | .swap = ISI_CFG2_YCC_SWAP_MODE_2, |
1008 | }, { |
1009 | .fourcc = V4L2_PIX_FMT_YUYV, |
1010 | .mbus_code = MEDIA_BUS_FMT_VYUY8_2X8, |
1011 | .bpp = 2, |
1012 | .swap = ISI_CFG2_YCC_SWAP_MODE_3, |
1013 | }, { |
1014 | .fourcc = V4L2_PIX_FMT_RGB565, |
1015 | .mbus_code = MEDIA_BUS_FMT_YUYV8_2X8, |
1016 | .bpp = 2, |
1017 | .swap = ISI_CFG2_YCC_SWAP_MODE_2, |
1018 | }, { |
1019 | .fourcc = V4L2_PIX_FMT_RGB565, |
1020 | .mbus_code = MEDIA_BUS_FMT_YVYU8_2X8, |
1021 | .bpp = 2, |
1022 | .swap = ISI_CFG2_YCC_SWAP_MODE_3, |
1023 | }, { |
1024 | .fourcc = V4L2_PIX_FMT_RGB565, |
1025 | .mbus_code = MEDIA_BUS_FMT_UYVY8_2X8, |
1026 | .bpp = 2, |
1027 | .swap = ISI_CFG2_YCC_SWAP_DEFAULT, |
1028 | }, { |
1029 | .fourcc = V4L2_PIX_FMT_RGB565, |
1030 | .mbus_code = MEDIA_BUS_FMT_VYUY8_2X8, |
1031 | .bpp = 2, |
1032 | .swap = ISI_CFG2_YCC_SWAP_MODE_1, |
1033 | }, { |
1034 | .fourcc = V4L2_PIX_FMT_GREY, |
1035 | .mbus_code = MEDIA_BUS_FMT_Y10_1X10, |
1036 | .bpp = 1, |
1037 | .swap = ISI_CFG2_GS_MODE_2_PIXEL | ISI_CFG2_GRAYSCALE, |
1038 | }, { |
1039 | .fourcc = V4L2_PIX_FMT_Y16, |
1040 | .mbus_code = MEDIA_BUS_FMT_Y10_1X10, |
1041 | .bpp = 2, |
1042 | .swap = ISI_CFG2_GS_MODE_2_PIXEL | ISI_CFG2_GRAYSCALE, |
1043 | }, |
1044 | }; |
1045 | |
1046 | static int isi_formats_init(struct atmel_isi *isi) |
1047 | { |
1048 | const struct isi_format *isi_fmts[ARRAY_SIZE(isi_formats)]; |
1049 | unsigned int num_fmts = 0, i, j; |
1050 | struct v4l2_subdev *subdev = isi->entity.subdev; |
1051 | struct v4l2_subdev_mbus_code_enum mbus_code = { |
1052 | .which = V4L2_SUBDEV_FORMAT_ACTIVE, |
1053 | }; |
1054 | |
1055 | while (!v4l2_subdev_call(subdev, pad, enum_mbus_code, |
1056 | NULL, &mbus_code)) { |
1057 | for (i = 0; i < ARRAY_SIZE(isi_formats); i++) { |
1058 | if (isi_formats[i].mbus_code != mbus_code.code) |
1059 | continue; |
1060 | |
1061 | /* Code supported, have we got this fourcc yet? */ |
1062 | for (j = 0; j < num_fmts; j++) |
1063 | if (isi_fmts[j]->fourcc == isi_formats[i].fourcc) |
1064 | /* Already available */ |
1065 | break; |
1066 | if (j == num_fmts) |
1067 | /* new */ |
1068 | isi_fmts[num_fmts++] = isi_formats + i; |
1069 | } |
1070 | mbus_code.index++; |
1071 | } |
1072 | |
1073 | if (!num_fmts) |
1074 | return -ENXIO; |
1075 | |
1076 | isi->num_user_formats = num_fmts; |
1077 | isi->user_formats = devm_kcalloc(dev: isi->dev, |
1078 | n: num_fmts, size: sizeof(struct isi_format *), |
1079 | GFP_KERNEL); |
1080 | if (!isi->user_formats) |
1081 | return -ENOMEM; |
1082 | |
1083 | memcpy(isi->user_formats, isi_fmts, |
1084 | num_fmts * sizeof(struct isi_format *)); |
1085 | isi->current_fmt = isi->user_formats[0]; |
1086 | |
1087 | return 0; |
1088 | } |
1089 | |
1090 | static int isi_graph_notify_complete(struct v4l2_async_notifier *notifier) |
1091 | { |
1092 | struct atmel_isi *isi = notifier_to_isi(notifier); |
1093 | int ret; |
1094 | |
1095 | isi->vdev->ctrl_handler = isi->entity.subdev->ctrl_handler; |
1096 | ret = isi_formats_init(isi); |
1097 | if (ret) { |
1098 | dev_err(isi->dev, "No supported mediabus format found\n" ); |
1099 | return ret; |
1100 | } |
1101 | ret = isi_camera_set_bus_param(isi); |
1102 | if (ret) { |
1103 | dev_err(isi->dev, "Can't wake up device\n" ); |
1104 | return ret; |
1105 | } |
1106 | |
1107 | ret = isi_set_default_fmt(isi); |
1108 | if (ret) { |
1109 | dev_err(isi->dev, "Could not set default format\n" ); |
1110 | return ret; |
1111 | } |
1112 | |
1113 | ret = video_register_device(vdev: isi->vdev, type: VFL_TYPE_VIDEO, nr: -1); |
1114 | if (ret) { |
1115 | dev_err(isi->dev, "Failed to register video device\n" ); |
1116 | return ret; |
1117 | } |
1118 | |
1119 | dev_dbg(isi->dev, "Device registered as %s\n" , |
1120 | video_device_node_name(isi->vdev)); |
1121 | return 0; |
1122 | } |
1123 | |
1124 | static void isi_graph_notify_unbind(struct v4l2_async_notifier *notifier, |
1125 | struct v4l2_subdev *sd, |
1126 | struct v4l2_async_connection *asd) |
1127 | { |
1128 | struct atmel_isi *isi = notifier_to_isi(notifier); |
1129 | |
1130 | dev_dbg(isi->dev, "Removing %s\n" , video_device_node_name(isi->vdev)); |
1131 | |
1132 | /* Checks internally if vdev have been init or not */ |
1133 | video_unregister_device(vdev: isi->vdev); |
1134 | } |
1135 | |
1136 | static int isi_graph_notify_bound(struct v4l2_async_notifier *notifier, |
1137 | struct v4l2_subdev *subdev, |
1138 | struct v4l2_async_connection *asd) |
1139 | { |
1140 | struct atmel_isi *isi = notifier_to_isi(notifier); |
1141 | |
1142 | dev_dbg(isi->dev, "subdev %s bound\n" , subdev->name); |
1143 | |
1144 | isi->entity.subdev = subdev; |
1145 | |
1146 | return 0; |
1147 | } |
1148 | |
1149 | static const struct v4l2_async_notifier_operations isi_graph_notify_ops = { |
1150 | .bound = isi_graph_notify_bound, |
1151 | .unbind = isi_graph_notify_unbind, |
1152 | .complete = isi_graph_notify_complete, |
1153 | }; |
1154 | |
1155 | static int isi_graph_init(struct atmel_isi *isi) |
1156 | { |
1157 | struct v4l2_async_connection *asd; |
1158 | struct device_node *ep; |
1159 | int ret; |
1160 | |
1161 | ep = of_graph_get_endpoint_by_regs(parent: isi->dev->of_node, port_reg: 0, reg: -1); |
1162 | if (!ep) |
1163 | return -EINVAL; |
1164 | |
1165 | v4l2_async_nf_init(notifier: &isi->notifier, v4l2_dev: &isi->v4l2_dev); |
1166 | |
1167 | asd = v4l2_async_nf_add_fwnode_remote(&isi->notifier, |
1168 | of_fwnode_handle(ep), |
1169 | struct v4l2_async_connection); |
1170 | of_node_put(node: ep); |
1171 | |
1172 | if (IS_ERR(ptr: asd)) |
1173 | return PTR_ERR(ptr: asd); |
1174 | |
1175 | isi->notifier.ops = &isi_graph_notify_ops; |
1176 | |
1177 | ret = v4l2_async_nf_register(notifier: &isi->notifier); |
1178 | if (ret < 0) { |
1179 | dev_err(isi->dev, "Notifier registration failed\n" ); |
1180 | v4l2_async_nf_cleanup(notifier: &isi->notifier); |
1181 | return ret; |
1182 | } |
1183 | |
1184 | return 0; |
1185 | } |
1186 | |
1187 | |
1188 | static int atmel_isi_probe(struct platform_device *pdev) |
1189 | { |
1190 | int irq; |
1191 | struct atmel_isi *isi; |
1192 | struct vb2_queue *q; |
1193 | int ret, i; |
1194 | |
1195 | isi = devm_kzalloc(dev: &pdev->dev, size: sizeof(struct atmel_isi), GFP_KERNEL); |
1196 | if (!isi) |
1197 | return -ENOMEM; |
1198 | |
1199 | isi->pclk = devm_clk_get(dev: &pdev->dev, id: "isi_clk" ); |
1200 | if (IS_ERR(ptr: isi->pclk)) |
1201 | return PTR_ERR(ptr: isi->pclk); |
1202 | |
1203 | ret = atmel_isi_parse_dt(isi, pdev); |
1204 | if (ret) |
1205 | return ret; |
1206 | |
1207 | isi->active = NULL; |
1208 | isi->dev = &pdev->dev; |
1209 | mutex_init(&isi->lock); |
1210 | spin_lock_init(&isi->irqlock); |
1211 | INIT_LIST_HEAD(list: &isi->video_buffer_list); |
1212 | INIT_LIST_HEAD(list: &isi->dma_desc_head); |
1213 | |
1214 | q = &isi->queue; |
1215 | |
1216 | /* Initialize the top-level structure */ |
1217 | ret = v4l2_device_register(dev: &pdev->dev, v4l2_dev: &isi->v4l2_dev); |
1218 | if (ret) |
1219 | return ret; |
1220 | |
1221 | isi->vdev = video_device_alloc(); |
1222 | if (!isi->vdev) { |
1223 | ret = -ENOMEM; |
1224 | goto err_vdev_alloc; |
1225 | } |
1226 | |
1227 | /* video node */ |
1228 | isi->vdev->fops = &isi_fops; |
1229 | isi->vdev->v4l2_dev = &isi->v4l2_dev; |
1230 | isi->vdev->queue = &isi->queue; |
1231 | strscpy(isi->vdev->name, KBUILD_MODNAME, sizeof(isi->vdev->name)); |
1232 | isi->vdev->release = video_device_release; |
1233 | isi->vdev->ioctl_ops = &isi_ioctl_ops; |
1234 | isi->vdev->lock = &isi->lock; |
1235 | isi->vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING | |
1236 | V4L2_CAP_READWRITE; |
1237 | video_set_drvdata(vdev: isi->vdev, data: isi); |
1238 | |
1239 | /* buffer queue */ |
1240 | q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
1241 | q->io_modes = VB2_MMAP | VB2_READ | VB2_DMABUF; |
1242 | q->lock = &isi->lock; |
1243 | q->drv_priv = isi; |
1244 | q->buf_struct_size = sizeof(struct frame_buffer); |
1245 | q->ops = &isi_video_qops; |
1246 | q->mem_ops = &vb2_dma_contig_memops; |
1247 | q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; |
1248 | q->min_queued_buffers = 2; |
1249 | q->dev = &pdev->dev; |
1250 | |
1251 | ret = vb2_queue_init(q); |
1252 | if (ret < 0) { |
1253 | dev_err(&pdev->dev, "failed to initialize VB2 queue\n" ); |
1254 | goto err_vb2_queue; |
1255 | } |
1256 | isi->p_fb_descriptors = dma_alloc_coherent(dev: &pdev->dev, |
1257 | size: sizeof(struct fbd) * VIDEO_MAX_FRAME, |
1258 | dma_handle: &isi->fb_descriptors_phys, |
1259 | GFP_KERNEL); |
1260 | if (!isi->p_fb_descriptors) { |
1261 | dev_err(&pdev->dev, "Can't allocate descriptors!\n" ); |
1262 | ret = -ENOMEM; |
1263 | goto err_dma_alloc; |
1264 | } |
1265 | |
1266 | for (i = 0; i < VIDEO_MAX_FRAME; i++) { |
1267 | isi->dma_desc[i].p_fbd = isi->p_fb_descriptors + i; |
1268 | isi->dma_desc[i].fbd_phys = isi->fb_descriptors_phys + |
1269 | i * sizeof(struct fbd); |
1270 | list_add(new: &isi->dma_desc[i].list, head: &isi->dma_desc_head); |
1271 | } |
1272 | |
1273 | isi->regs = devm_platform_ioremap_resource(pdev, index: 0); |
1274 | if (IS_ERR(ptr: isi->regs)) { |
1275 | ret = PTR_ERR(ptr: isi->regs); |
1276 | goto err_ioremap; |
1277 | } |
1278 | |
1279 | if (isi->pdata.data_width_flags & ISI_DATAWIDTH_8) |
1280 | isi->width_flags = 1 << 7; |
1281 | if (isi->pdata.data_width_flags & ISI_DATAWIDTH_10) |
1282 | isi->width_flags |= 1 << 9; |
1283 | |
1284 | irq = platform_get_irq(pdev, 0); |
1285 | if (irq < 0) { |
1286 | ret = irq; |
1287 | goto err_req_irq; |
1288 | } |
1289 | |
1290 | ret = devm_request_irq(dev: &pdev->dev, irq, handler: isi_interrupt, irqflags: 0, devname: "isi" , dev_id: isi); |
1291 | if (ret) { |
1292 | dev_err(&pdev->dev, "Unable to request irq %d\n" , irq); |
1293 | goto err_req_irq; |
1294 | } |
1295 | isi->irq = irq; |
1296 | |
1297 | ret = isi_graph_init(isi); |
1298 | if (ret < 0) |
1299 | goto err_req_irq; |
1300 | |
1301 | pm_suspend_ignore_children(dev: &pdev->dev, enable: true); |
1302 | pm_runtime_enable(dev: &pdev->dev); |
1303 | platform_set_drvdata(pdev, data: isi); |
1304 | return 0; |
1305 | |
1306 | err_req_irq: |
1307 | err_ioremap: |
1308 | dma_free_coherent(dev: &pdev->dev, |
1309 | size: sizeof(struct fbd) * VIDEO_MAX_FRAME, |
1310 | cpu_addr: isi->p_fb_descriptors, |
1311 | dma_handle: isi->fb_descriptors_phys); |
1312 | err_dma_alloc: |
1313 | err_vb2_queue: |
1314 | video_device_release(vdev: isi->vdev); |
1315 | err_vdev_alloc: |
1316 | v4l2_device_unregister(v4l2_dev: &isi->v4l2_dev); |
1317 | |
1318 | return ret; |
1319 | } |
1320 | |
1321 | static void atmel_isi_remove(struct platform_device *pdev) |
1322 | { |
1323 | struct atmel_isi *isi = platform_get_drvdata(pdev); |
1324 | |
1325 | dma_free_coherent(dev: &pdev->dev, |
1326 | size: sizeof(struct fbd) * VIDEO_MAX_FRAME, |
1327 | cpu_addr: isi->p_fb_descriptors, |
1328 | dma_handle: isi->fb_descriptors_phys); |
1329 | pm_runtime_disable(dev: &pdev->dev); |
1330 | v4l2_async_nf_unregister(notifier: &isi->notifier); |
1331 | v4l2_async_nf_cleanup(notifier: &isi->notifier); |
1332 | v4l2_device_unregister(v4l2_dev: &isi->v4l2_dev); |
1333 | } |
1334 | |
1335 | #ifdef CONFIG_PM |
1336 | static int atmel_isi_runtime_suspend(struct device *dev) |
1337 | { |
1338 | struct atmel_isi *isi = dev_get_drvdata(dev); |
1339 | |
1340 | clk_disable_unprepare(clk: isi->pclk); |
1341 | |
1342 | return 0; |
1343 | } |
1344 | static int atmel_isi_runtime_resume(struct device *dev) |
1345 | { |
1346 | struct atmel_isi *isi = dev_get_drvdata(dev); |
1347 | |
1348 | return clk_prepare_enable(clk: isi->pclk); |
1349 | } |
1350 | #endif /* CONFIG_PM */ |
1351 | |
1352 | static const struct dev_pm_ops atmel_isi_dev_pm_ops = { |
1353 | SET_RUNTIME_PM_OPS(atmel_isi_runtime_suspend, |
1354 | atmel_isi_runtime_resume, NULL) |
1355 | }; |
1356 | |
1357 | static const struct of_device_id atmel_isi_of_match[] = { |
1358 | { .compatible = "atmel,at91sam9g45-isi" }, |
1359 | { } |
1360 | }; |
1361 | MODULE_DEVICE_TABLE(of, atmel_isi_of_match); |
1362 | |
1363 | static struct platform_driver atmel_isi_driver = { |
1364 | .driver = { |
1365 | .name = "atmel_isi" , |
1366 | .of_match_table = of_match_ptr(atmel_isi_of_match), |
1367 | .pm = &atmel_isi_dev_pm_ops, |
1368 | }, |
1369 | .probe = atmel_isi_probe, |
1370 | .remove_new = atmel_isi_remove, |
1371 | }; |
1372 | |
1373 | module_platform_driver(atmel_isi_driver); |
1374 | |
1375 | MODULE_AUTHOR("Josh Wu <josh.wu@atmel.com>" ); |
1376 | MODULE_DESCRIPTION("The V4L2 driver for Atmel Linux" ); |
1377 | MODULE_LICENSE("GPL" ); |
1378 | |