1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * V4L2 Driver for SuperH Mobile CEU interface
4 *
5 * Copyright (C) 2008 Magnus Damm
6 *
7 * Based on V4L2 Driver for PXA camera host - "pxa_camera.c",
8 *
9 * Copyright (C) 2006, Sascha Hauer, Pengutronix
10 * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
11 */
12
13 #include <linux/init.h>
14 #include <linux/module.h>
15 #include <linux/io.h>
16 #include <linux/completion.h>
17 #include <linux/delay.h>
18 #include <linux/dma-mapping.h>
19 #include <linux/err.h>
20 #include <linux/errno.h>
21 #include <linux/fs.h>
22 #include <linux/interrupt.h>
23 #include <linux/kernel.h>
24 #include <linux/mm.h>
25 #include <linux/moduleparam.h>
26 #include <linux/of.h>
27 #include <linux/time.h>
28 #include <linux/slab.h>
29 #include <linux/device.h>
30 #include <linux/platform_device.h>
31 #include <linux/videodev2.h>
32 #include <linux/pm_runtime.h>
33 #include <linux/sched.h>
34
35 #include <media/v4l2-async.h>
36 #include <media/v4l2-common.h>
37 #include <media/v4l2-dev.h>
38 #include <media/soc_camera.h>
39 #include <media/drv-intf/sh_mobile_ceu.h>
40 #include <media/videobuf2-dma-contig.h>
41 #include <media/v4l2-mediabus.h>
42 #include <media/drv-intf/soc_mediabus.h>
43
44 #include "soc_scale_crop.h"
45
46 /* register offsets for sh7722 / sh7723 */
47
48 #define CAPSR 0x00 /* Capture start register */
49 #define CAPCR 0x04 /* Capture control register */
50 #define CAMCR 0x08 /* Capture interface control register */
51 #define CMCYR 0x0c /* Capture interface cycle register */
52 #define CAMOR 0x10 /* Capture interface offset register */
53 #define CAPWR 0x14 /* Capture interface width register */
54 #define CAIFR 0x18 /* Capture interface input format register */
55 #define CSTCR 0x20 /* Camera strobe control register (<= sh7722) */
56 #define CSECR 0x24 /* Camera strobe emission count register (<= sh7722) */
57 #define CRCNTR 0x28 /* CEU register control register */
58 #define CRCMPR 0x2c /* CEU register forcible control register */
59 #define CFLCR 0x30 /* Capture filter control register */
60 #define CFSZR 0x34 /* Capture filter size clip register */
61 #define CDWDR 0x38 /* Capture destination width register */
62 #define CDAYR 0x3c /* Capture data address Y register */
63 #define CDACR 0x40 /* Capture data address C register */
64 #define CDBYR 0x44 /* Capture data bottom-field address Y register */
65 #define CDBCR 0x48 /* Capture data bottom-field address C register */
66 #define CBDSR 0x4c /* Capture bundle destination size register */
67 #define CFWCR 0x5c /* Firewall operation control register */
68 #define CLFCR 0x60 /* Capture low-pass filter control register */
69 #define CDOCR 0x64 /* Capture data output control register */
70 #define CDDCR 0x68 /* Capture data complexity level register */
71 #define CDDAR 0x6c /* Capture data complexity level address register */
72 #define CEIER 0x70 /* Capture event interrupt enable register */
73 #define CETCR 0x74 /* Capture event flag clear register */
74 #define CSTSR 0x7c /* Capture status register */
75 #define CSRTR 0x80 /* Capture software reset register */
76 #define CDSSR 0x84 /* Capture data size register */
77 #define CDAYR2 0x90 /* Capture data address Y register 2 */
78 #define CDACR2 0x94 /* Capture data address C register 2 */
79 #define CDBYR2 0x98 /* Capture data bottom-field address Y register 2 */
80 #define CDBCR2 0x9c /* Capture data bottom-field address C register 2 */
81
82 #undef DEBUG_GEOMETRY
83 #ifdef DEBUG_GEOMETRY
84 #define dev_geo dev_info
85 #else
86 #define dev_geo dev_dbg
87 #endif
88
89 /* per video frame buffer */
90 struct sh_mobile_ceu_buffer {
91 struct vb2_v4l2_buffer vb; /* v4l buffer must be first */
92 struct list_head queue;
93 };
94
95 struct sh_mobile_ceu_dev {
96 struct soc_camera_host ici;
97
98 unsigned int irq;
99 void __iomem *base;
100 size_t video_limit;
101 size_t buf_total;
102
103 spinlock_t lock; /* Protects video buffer lists */
104 struct list_head capture;
105 struct vb2_v4l2_buffer *active;
106
107 struct sh_mobile_ceu_info *pdata;
108 struct completion complete;
109
110 u32 cflcr;
111
112 /* static max sizes either from platform data or default */
113 int max_width;
114 int max_height;
115
116 enum v4l2_field field;
117 int sequence;
118 unsigned long flags;
119
120 unsigned int image_mode:1;
121 unsigned int is_16bit:1;
122 unsigned int frozen:1;
123 };
124
125 struct sh_mobile_ceu_cam {
126 /* CEU offsets within the camera output, before the CEU scaler */
127 unsigned int ceu_left;
128 unsigned int ceu_top;
129 /* Client output, as seen by the CEU */
130 unsigned int width;
131 unsigned int height;
132 /*
133 * User window from S_SELECTION / G_SELECTION, produced by client cropping and
134 * scaling, CEU scaling and CEU cropping, mapped back onto the client
135 * input window
136 */
137 struct v4l2_rect subrect;
138 /* Camera cropping rectangle */
139 struct v4l2_rect rect;
140 const struct soc_mbus_pixelfmt *extra_fmt;
141 u32 code;
142 };
143
to_ceu_vb(struct vb2_v4l2_buffer * vbuf)144 static struct sh_mobile_ceu_buffer *to_ceu_vb(struct vb2_v4l2_buffer *vbuf)
145 {
146 return container_of(vbuf, struct sh_mobile_ceu_buffer, vb);
147 }
148
ceu_write(struct sh_mobile_ceu_dev * priv,unsigned long reg_offs,u32 data)149 static void ceu_write(struct sh_mobile_ceu_dev *priv,
150 unsigned long reg_offs, u32 data)
151 {
152 iowrite32(data, priv->base + reg_offs);
153 }
154
ceu_read(struct sh_mobile_ceu_dev * priv,unsigned long reg_offs)155 static u32 ceu_read(struct sh_mobile_ceu_dev *priv, unsigned long reg_offs)
156 {
157 return ioread32(priv->base + reg_offs);
158 }
159
sh_mobile_ceu_soft_reset(struct sh_mobile_ceu_dev * pcdev)160 static int sh_mobile_ceu_soft_reset(struct sh_mobile_ceu_dev *pcdev)
161 {
162 int i, success = 0;
163
164 ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
165
166 /* wait CSTSR.CPTON bit */
167 for (i = 0; i < 1000; i++) {
168 if (!(ceu_read(pcdev, CSTSR) & 1)) {
169 success++;
170 break;
171 }
172 udelay(1);
173 }
174
175 /* wait CAPSR.CPKIL bit */
176 for (i = 0; i < 1000; i++) {
177 if (!(ceu_read(pcdev, CAPSR) & (1 << 16))) {
178 success++;
179 break;
180 }
181 udelay(1);
182 }
183
184 if (2 != success) {
185 dev_warn(pcdev->ici.v4l2_dev.dev, "soft reset time out\n");
186 return -EIO;
187 }
188
189 return 0;
190 }
191
192 /*
193 * Videobuf operations
194 */
195
196 /*
197 * .queue_setup() is called to check, whether the driver can accept the
198 * requested number of buffers and to fill in plane sizes
199 * for the current frame format if required
200 */
sh_mobile_ceu_videobuf_setup(struct vb2_queue * vq,unsigned int * count,unsigned int * num_planes,unsigned int sizes[],struct device * alloc_devs[])201 static int sh_mobile_ceu_videobuf_setup(struct vb2_queue *vq,
202 unsigned int *count, unsigned int *num_planes,
203 unsigned int sizes[], struct device *alloc_devs[])
204 {
205 struct soc_camera_device *icd = soc_camera_from_vb2q(vq);
206 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
207 struct sh_mobile_ceu_dev *pcdev = ici->priv;
208
209 if (!vq->num_buffers)
210 pcdev->sequence = 0;
211
212 if (!*count)
213 *count = 2;
214
215 /* Called from VIDIOC_REQBUFS or in compatibility mode */
216 if (!*num_planes)
217 sizes[0] = icd->sizeimage;
218 else if (sizes[0] < icd->sizeimage)
219 return -EINVAL;
220
221 /* If *num_planes != 0, we have already verified *count. */
222 if (pcdev->video_limit) {
223 size_t size = PAGE_ALIGN(sizes[0]) * *count;
224
225 if (size + pcdev->buf_total > pcdev->video_limit)
226 *count = (pcdev->video_limit - pcdev->buf_total) /
227 PAGE_ALIGN(sizes[0]);
228 }
229
230 *num_planes = 1;
231
232 dev_dbg(icd->parent, "count=%d, size=%u\n", *count, sizes[0]);
233
234 return 0;
235 }
236
237 #define CEU_CETCR_MAGIC 0x0317f313 /* acknowledge magical interrupt sources */
238 #define CEU_CETCR_IGRW (1 << 4) /* prohibited register access interrupt bit */
239 #define CEU_CEIER_CPEIE (1 << 0) /* one-frame capture end interrupt */
240 #define CEU_CEIER_VBP (1 << 20) /* vbp error */
241 #define CEU_CAPCR_CTNCP (1 << 16) /* continuous capture mode (if set) */
242 #define CEU_CEIER_MASK (CEU_CEIER_CPEIE | CEU_CEIER_VBP)
243
244
245 /*
246 * return value doesn't reflex the success/failure to queue the new buffer,
247 * but rather the status of the previous buffer.
248 */
sh_mobile_ceu_capture(struct sh_mobile_ceu_dev * pcdev)249 static int sh_mobile_ceu_capture(struct sh_mobile_ceu_dev *pcdev)
250 {
251 struct soc_camera_device *icd = pcdev->ici.icd;
252 dma_addr_t phys_addr_top, phys_addr_bottom;
253 unsigned long top1, top2;
254 unsigned long bottom1, bottom2;
255 u32 status;
256 bool planar;
257 int ret = 0;
258
259 /*
260 * The hardware is _very_ picky about this sequence. Especially
261 * the CEU_CETCR_MAGIC value. It seems like we need to acknowledge
262 * several not-so-well documented interrupt sources in CETCR.
263 */
264 ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) & ~CEU_CEIER_MASK);
265 status = ceu_read(pcdev, CETCR);
266 ceu_write(pcdev, CETCR, ~status & CEU_CETCR_MAGIC);
267 if (!pcdev->frozen)
268 ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) | CEU_CEIER_MASK);
269 ceu_write(pcdev, CAPCR, ceu_read(pcdev, CAPCR) & ~CEU_CAPCR_CTNCP);
270 ceu_write(pcdev, CETCR, CEU_CETCR_MAGIC ^ CEU_CETCR_IGRW);
271
272 /*
273 * When a VBP interrupt occurs, a capture end interrupt does not occur
274 * and the image of that frame is not captured correctly. So, soft reset
275 * is needed here.
276 */
277 if (status & CEU_CEIER_VBP) {
278 sh_mobile_ceu_soft_reset(pcdev);
279 ret = -EIO;
280 }
281
282 if (pcdev->frozen) {
283 complete(&pcdev->complete);
284 return ret;
285 }
286
287 if (!pcdev->active)
288 return ret;
289
290 if (V4L2_FIELD_INTERLACED_BT == pcdev->field) {
291 top1 = CDBYR;
292 top2 = CDBCR;
293 bottom1 = CDAYR;
294 bottom2 = CDACR;
295 } else {
296 top1 = CDAYR;
297 top2 = CDACR;
298 bottom1 = CDBYR;
299 bottom2 = CDBCR;
300 }
301
302 phys_addr_top =
303 vb2_dma_contig_plane_dma_addr(&pcdev->active->vb2_buf, 0);
304
305 switch (icd->current_fmt->host_fmt->fourcc) {
306 case V4L2_PIX_FMT_NV12:
307 case V4L2_PIX_FMT_NV21:
308 case V4L2_PIX_FMT_NV16:
309 case V4L2_PIX_FMT_NV61:
310 planar = true;
311 break;
312 default:
313 planar = false;
314 }
315
316 ceu_write(pcdev, top1, phys_addr_top);
317 if (V4L2_FIELD_NONE != pcdev->field) {
318 phys_addr_bottom = phys_addr_top + icd->bytesperline;
319 ceu_write(pcdev, bottom1, phys_addr_bottom);
320 }
321
322 if (planar) {
323 phys_addr_top += icd->bytesperline * icd->user_height;
324 ceu_write(pcdev, top2, phys_addr_top);
325 if (V4L2_FIELD_NONE != pcdev->field) {
326 phys_addr_bottom = phys_addr_top + icd->bytesperline;
327 ceu_write(pcdev, bottom2, phys_addr_bottom);
328 }
329 }
330
331 ceu_write(pcdev, CAPSR, 0x1); /* start capture */
332
333 return ret;
334 }
335
sh_mobile_ceu_videobuf_prepare(struct vb2_buffer * vb)336 static int sh_mobile_ceu_videobuf_prepare(struct vb2_buffer *vb)
337 {
338 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
339 struct sh_mobile_ceu_buffer *buf = to_ceu_vb(vbuf);
340
341 /* Added list head initialization on alloc */
342 WARN(!list_empty(&buf->queue), "Buffer %p on queue!\n", vb);
343
344 return 0;
345 }
346
sh_mobile_ceu_videobuf_queue(struct vb2_buffer * vb)347 static void sh_mobile_ceu_videobuf_queue(struct vb2_buffer *vb)
348 {
349 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
350 struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
351 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
352 struct sh_mobile_ceu_dev *pcdev = ici->priv;
353 struct sh_mobile_ceu_buffer *buf = to_ceu_vb(vbuf);
354 unsigned long size;
355
356 size = icd->sizeimage;
357
358 if (vb2_plane_size(vb, 0) < size) {
359 dev_err(icd->parent, "Buffer #%d too small (%lu < %lu)\n",
360 vb->index, vb2_plane_size(vb, 0), size);
361 goto error;
362 }
363
364 vb2_set_plane_payload(vb, 0, size);
365
366 dev_dbg(icd->parent, "%s (vb=0x%p) 0x%p %lu\n", __func__,
367 vb, vb2_plane_vaddr(vb, 0), vb2_get_plane_payload(vb, 0));
368
369 #ifdef DEBUG
370 /*
371 * This can be useful if you want to see if we actually fill
372 * the buffer with something
373 */
374 if (vb2_plane_vaddr(vb, 0))
375 memset(vb2_plane_vaddr(vb, 0), 0xaa, vb2_get_plane_payload(vb, 0));
376 #endif
377
378 spin_lock_irq(&pcdev->lock);
379 list_add_tail(&buf->queue, &pcdev->capture);
380
381 if (!pcdev->active) {
382 /*
383 * Because there were no active buffer at this moment,
384 * we are not interested in the return value of
385 * sh_mobile_ceu_capture here.
386 */
387 pcdev->active = vbuf;
388 sh_mobile_ceu_capture(pcdev);
389 }
390 spin_unlock_irq(&pcdev->lock);
391
392 return;
393
394 error:
395 vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
396 }
397
sh_mobile_ceu_videobuf_release(struct vb2_buffer * vb)398 static void sh_mobile_ceu_videobuf_release(struct vb2_buffer *vb)
399 {
400 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
401 struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
402 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
403 struct sh_mobile_ceu_buffer *buf = to_ceu_vb(vbuf);
404 struct sh_mobile_ceu_dev *pcdev = ici->priv;
405
406 spin_lock_irq(&pcdev->lock);
407
408 if (pcdev->active == vbuf) {
409 /* disable capture (release DMA buffer), reset */
410 ceu_write(pcdev, CAPSR, 1 << 16);
411 pcdev->active = NULL;
412 }
413
414 /*
415 * Doesn't hurt also if the list is empty, but it hurts, if queuing the
416 * buffer failed, and .buf_init() hasn't been called
417 */
418 if (buf->queue.next)
419 list_del_init(&buf->queue);
420
421 pcdev->buf_total -= PAGE_ALIGN(vb2_plane_size(vb, 0));
422 dev_dbg(icd->parent, "%s() %zu bytes buffers\n", __func__,
423 pcdev->buf_total);
424
425 spin_unlock_irq(&pcdev->lock);
426 }
427
sh_mobile_ceu_videobuf_init(struct vb2_buffer * vb)428 static int sh_mobile_ceu_videobuf_init(struct vb2_buffer *vb)
429 {
430 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
431 struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
432 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
433 struct sh_mobile_ceu_dev *pcdev = ici->priv;
434
435 pcdev->buf_total += PAGE_ALIGN(vb2_plane_size(vb, 0));
436 dev_dbg(icd->parent, "%s() %zu bytes buffers\n", __func__,
437 pcdev->buf_total);
438
439 /* This is for locking debugging only */
440 INIT_LIST_HEAD(&to_ceu_vb(vbuf)->queue);
441 return 0;
442 }
443
sh_mobile_ceu_stop_streaming(struct vb2_queue * q)444 static void sh_mobile_ceu_stop_streaming(struct vb2_queue *q)
445 {
446 struct soc_camera_device *icd = soc_camera_from_vb2q(q);
447 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
448 struct sh_mobile_ceu_dev *pcdev = ici->priv;
449 struct list_head *buf_head, *tmp;
450 struct vb2_v4l2_buffer *vbuf;
451
452 spin_lock_irq(&pcdev->lock);
453
454 pcdev->active = NULL;
455
456 list_for_each_safe(buf_head, tmp, &pcdev->capture) {
457 vbuf = &list_entry(buf_head, struct sh_mobile_ceu_buffer,
458 queue)->vb;
459 vb2_buffer_done(&vbuf->vb2_buf, VB2_BUF_STATE_DONE);
460 list_del_init(buf_head);
461 }
462
463 spin_unlock_irq(&pcdev->lock);
464
465 sh_mobile_ceu_soft_reset(pcdev);
466 }
467
468 static const struct vb2_ops sh_mobile_ceu_videobuf_ops = {
469 .queue_setup = sh_mobile_ceu_videobuf_setup,
470 .buf_prepare = sh_mobile_ceu_videobuf_prepare,
471 .buf_queue = sh_mobile_ceu_videobuf_queue,
472 .buf_cleanup = sh_mobile_ceu_videobuf_release,
473 .buf_init = sh_mobile_ceu_videobuf_init,
474 .wait_prepare = vb2_ops_wait_prepare,
475 .wait_finish = vb2_ops_wait_finish,
476 .stop_streaming = sh_mobile_ceu_stop_streaming,
477 };
478
sh_mobile_ceu_irq(int irq,void * data)479 static irqreturn_t sh_mobile_ceu_irq(int irq, void *data)
480 {
481 struct sh_mobile_ceu_dev *pcdev = data;
482 struct vb2_v4l2_buffer *vbuf;
483 int ret;
484
485 spin_lock(&pcdev->lock);
486
487 vbuf = pcdev->active;
488 if (!vbuf)
489 /* Stale interrupt from a released buffer */
490 goto out;
491
492 list_del_init(&to_ceu_vb(vbuf)->queue);
493
494 if (!list_empty(&pcdev->capture))
495 pcdev->active = &list_entry(pcdev->capture.next,
496 struct sh_mobile_ceu_buffer, queue)->vb;
497 else
498 pcdev->active = NULL;
499
500 ret = sh_mobile_ceu_capture(pcdev);
501 vbuf->vb2_buf.timestamp = ktime_get_ns();
502 if (!ret) {
503 vbuf->field = pcdev->field;
504 vbuf->sequence = pcdev->sequence++;
505 }
506 vb2_buffer_done(&vbuf->vb2_buf,
507 ret < 0 ? VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
508
509 out:
510 spin_unlock(&pcdev->lock);
511
512 return IRQ_HANDLED;
513 }
514
sh_mobile_ceu_add_device(struct soc_camera_device * icd)515 static int sh_mobile_ceu_add_device(struct soc_camera_device *icd)
516 {
517 dev_info(icd->parent,
518 "SuperH Mobile CEU driver attached to camera %d\n",
519 icd->devnum);
520
521 return 0;
522 }
523
sh_mobile_ceu_remove_device(struct soc_camera_device * icd)524 static void sh_mobile_ceu_remove_device(struct soc_camera_device *icd)
525 {
526 dev_info(icd->parent,
527 "SuperH Mobile CEU driver detached from camera %d\n",
528 icd->devnum);
529 }
530
531 /* Called with .host_lock held */
sh_mobile_ceu_clock_start(struct soc_camera_host * ici)532 static int sh_mobile_ceu_clock_start(struct soc_camera_host *ici)
533 {
534 struct sh_mobile_ceu_dev *pcdev = ici->priv;
535
536 pm_runtime_get_sync(ici->v4l2_dev.dev);
537
538 pcdev->buf_total = 0;
539
540 sh_mobile_ceu_soft_reset(pcdev);
541
542 return 0;
543 }
544
545 /* Called with .host_lock held */
sh_mobile_ceu_clock_stop(struct soc_camera_host * ici)546 static void sh_mobile_ceu_clock_stop(struct soc_camera_host *ici)
547 {
548 struct sh_mobile_ceu_dev *pcdev = ici->priv;
549
550 /* disable capture, disable interrupts */
551 ceu_write(pcdev, CEIER, 0);
552 sh_mobile_ceu_soft_reset(pcdev);
553
554 /* make sure active buffer is canceled */
555 spin_lock_irq(&pcdev->lock);
556 if (pcdev->active) {
557 list_del_init(&to_ceu_vb(pcdev->active)->queue);
558 vb2_buffer_done(&pcdev->active->vb2_buf, VB2_BUF_STATE_ERROR);
559 pcdev->active = NULL;
560 }
561 spin_unlock_irq(&pcdev->lock);
562
563 pm_runtime_put(ici->v4l2_dev.dev);
564 }
565
566 /*
567 * See chapter 29.4.12 "Capture Filter Control Register (CFLCR)"
568 * in SH7722 Hardware Manual
569 */
size_dst(unsigned int src,unsigned int scale)570 static unsigned int size_dst(unsigned int src, unsigned int scale)
571 {
572 unsigned int mant_pre = scale >> 12;
573 if (!src || !scale)
574 return src;
575 return ((mant_pre + 2 * (src - 1)) / (2 * mant_pre) - 1) *
576 mant_pre * 4096 / scale + 1;
577 }
578
calc_scale(unsigned int src,unsigned int * dst)579 static u16 calc_scale(unsigned int src, unsigned int *dst)
580 {
581 u16 scale;
582
583 if (src == *dst)
584 return 0;
585
586 scale = (src * 4096 / *dst) & ~7;
587
588 while (scale > 4096 && size_dst(src, scale) < *dst)
589 scale -= 8;
590
591 *dst = size_dst(src, scale);
592
593 return scale;
594 }
595
596 /* rect is guaranteed to not exceed the scaled camera rectangle */
sh_mobile_ceu_set_rect(struct soc_camera_device * icd)597 static void sh_mobile_ceu_set_rect(struct soc_camera_device *icd)
598 {
599 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
600 struct sh_mobile_ceu_cam *cam = icd->host_priv;
601 struct sh_mobile_ceu_dev *pcdev = ici->priv;
602 unsigned int height, width, cdwdr_width, in_width, in_height;
603 unsigned int left_offset, top_offset;
604 u32 camor;
605
606 dev_geo(icd->parent, "Crop %ux%u@%u:%u\n",
607 icd->user_width, icd->user_height, cam->ceu_left, cam->ceu_top);
608
609 left_offset = cam->ceu_left;
610 top_offset = cam->ceu_top;
611
612 WARN_ON(icd->user_width & 3 || icd->user_height & 3);
613
614 width = icd->user_width;
615
616 if (pcdev->image_mode) {
617 in_width = cam->width;
618 if (!pcdev->is_16bit) {
619 in_width *= 2;
620 left_offset *= 2;
621 }
622 } else {
623 unsigned int w_factor;
624
625 switch (icd->current_fmt->host_fmt->packing) {
626 case SOC_MBUS_PACKING_2X8_PADHI:
627 w_factor = 2;
628 break;
629 default:
630 w_factor = 1;
631 }
632
633 in_width = cam->width * w_factor;
634 left_offset *= w_factor;
635 }
636
637 cdwdr_width = icd->bytesperline;
638
639 height = icd->user_height;
640 in_height = cam->height;
641 if (V4L2_FIELD_NONE != pcdev->field) {
642 height = (height / 2) & ~3;
643 in_height /= 2;
644 top_offset /= 2;
645 cdwdr_width *= 2;
646 }
647
648 /* Set CAMOR, CAPWR, CFSZR, take care of CDWDR */
649 camor = left_offset | (top_offset << 16);
650
651 dev_geo(icd->parent,
652 "CAMOR 0x%x, CAPWR 0x%x, CFSZR 0x%x, CDWDR 0x%x\n", camor,
653 (in_height << 16) | in_width, (height << 16) | width,
654 cdwdr_width);
655
656 ceu_write(pcdev, CAMOR, camor);
657 ceu_write(pcdev, CAPWR, (in_height << 16) | in_width);
658 /* CFSZR clipping is applied _after_ the scaling filter (CFLCR) */
659 ceu_write(pcdev, CFSZR, (height << 16) | width);
660 ceu_write(pcdev, CDWDR, cdwdr_width);
661 }
662
capture_save_reset(struct sh_mobile_ceu_dev * pcdev)663 static u32 capture_save_reset(struct sh_mobile_ceu_dev *pcdev)
664 {
665 u32 capsr = ceu_read(pcdev, CAPSR);
666 ceu_write(pcdev, CAPSR, 1 << 16); /* reset, stop capture */
667 return capsr;
668 }
669
capture_restore(struct sh_mobile_ceu_dev * pcdev,u32 capsr)670 static void capture_restore(struct sh_mobile_ceu_dev *pcdev, u32 capsr)
671 {
672 unsigned long timeout = jiffies + 10 * HZ;
673
674 /*
675 * Wait until the end of the current frame. It can take a long time,
676 * but if it has been aborted by a CAPSR reset, it shoule exit sooner.
677 */
678 while ((ceu_read(pcdev, CSTSR) & 1) && time_before(jiffies, timeout))
679 msleep(1);
680
681 if (time_after(jiffies, timeout)) {
682 dev_err(pcdev->ici.v4l2_dev.dev,
683 "Timeout waiting for frame end! Interface problem?\n");
684 return;
685 }
686
687 /* Wait until reset clears, this shall not hang... */
688 while (ceu_read(pcdev, CAPSR) & (1 << 16))
689 udelay(10);
690
691 /* Anything to restore? */
692 if (capsr & ~(1 << 16))
693 ceu_write(pcdev, CAPSR, capsr);
694 }
695
696 #define CEU_BUS_FLAGS (V4L2_MBUS_MASTER | \
697 V4L2_MBUS_PCLK_SAMPLE_RISING | \
698 V4L2_MBUS_HSYNC_ACTIVE_HIGH | \
699 V4L2_MBUS_HSYNC_ACTIVE_LOW | \
700 V4L2_MBUS_VSYNC_ACTIVE_HIGH | \
701 V4L2_MBUS_VSYNC_ACTIVE_LOW | \
702 V4L2_MBUS_DATA_ACTIVE_HIGH)
703
704 /* Capture is not running, no interrupts, no locking needed */
sh_mobile_ceu_set_bus_param(struct soc_camera_device * icd)705 static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd)
706 {
707 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
708 struct sh_mobile_ceu_dev *pcdev = ici->priv;
709 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
710 struct sh_mobile_ceu_cam *cam = icd->host_priv;
711 struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,};
712 unsigned long value, common_flags = CEU_BUS_FLAGS;
713 u32 capsr = capture_save_reset(pcdev);
714 unsigned int yuv_lineskip;
715 int ret;
716
717 /*
718 * If the client doesn't implement g_mbus_config, we just use our
719 * platform data
720 */
721 ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg);
722 if (!ret) {
723 common_flags = soc_mbus_config_compatible(&cfg,
724 common_flags);
725 if (!common_flags)
726 return -EINVAL;
727 } else if (ret != -ENOIOCTLCMD) {
728 return ret;
729 }
730
731 /* Make choises, based on platform preferences */
732 if ((common_flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH) &&
733 (common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)) {
734 if (pcdev->flags & SH_CEU_FLAG_HSYNC_LOW)
735 common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_HIGH;
736 else
737 common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_LOW;
738 }
739
740 if ((common_flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH) &&
741 (common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)) {
742 if (pcdev->flags & SH_CEU_FLAG_VSYNC_LOW)
743 common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_HIGH;
744 else
745 common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_LOW;
746 }
747
748 cfg.flags = common_flags;
749 ret = v4l2_subdev_call(sd, video, s_mbus_config, &cfg);
750 if (ret < 0 && ret != -ENOIOCTLCMD)
751 return ret;
752
753 if (icd->current_fmt->host_fmt->bits_per_sample > 8)
754 pcdev->is_16bit = 1;
755 else
756 pcdev->is_16bit = 0;
757
758 ceu_write(pcdev, CRCNTR, 0);
759 ceu_write(pcdev, CRCMPR, 0);
760
761 value = 0x00000010; /* data fetch by default */
762 yuv_lineskip = 0x10;
763
764 switch (icd->current_fmt->host_fmt->fourcc) {
765 case V4L2_PIX_FMT_NV12:
766 case V4L2_PIX_FMT_NV21:
767 /* convert 4:2:2 -> 4:2:0 */
768 yuv_lineskip = 0; /* skip for NV12/21, no skip for NV16/61 */
769 /* fall-through */
770 case V4L2_PIX_FMT_NV16:
771 case V4L2_PIX_FMT_NV61:
772 switch (cam->code) {
773 case MEDIA_BUS_FMT_UYVY8_2X8:
774 value = 0x00000000; /* Cb0, Y0, Cr0, Y1 */
775 break;
776 case MEDIA_BUS_FMT_VYUY8_2X8:
777 value = 0x00000100; /* Cr0, Y0, Cb0, Y1 */
778 break;
779 case MEDIA_BUS_FMT_YUYV8_2X8:
780 value = 0x00000200; /* Y0, Cb0, Y1, Cr0 */
781 break;
782 case MEDIA_BUS_FMT_YVYU8_2X8:
783 value = 0x00000300; /* Y0, Cr0, Y1, Cb0 */
784 break;
785 default:
786 BUG();
787 }
788 }
789
790 if (icd->current_fmt->host_fmt->fourcc == V4L2_PIX_FMT_NV21 ||
791 icd->current_fmt->host_fmt->fourcc == V4L2_PIX_FMT_NV61)
792 value ^= 0x00000100; /* swap U, V to change from NV1x->NVx1 */
793
794 value |= common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW ? 1 << 1 : 0;
795 value |= common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW ? 1 << 0 : 0;
796
797 if (pcdev->is_16bit)
798 value |= 1 << 12;
799 else if (pcdev->flags & SH_CEU_FLAG_LOWER_8BIT)
800 value |= 2 << 12;
801
802 ceu_write(pcdev, CAMCR, value);
803
804 ceu_write(pcdev, CAPCR, 0x00300000);
805
806 switch (pcdev->field) {
807 case V4L2_FIELD_INTERLACED_TB:
808 value = 0x101;
809 break;
810 case V4L2_FIELD_INTERLACED_BT:
811 value = 0x102;
812 break;
813 default:
814 value = 0;
815 break;
816 }
817 ceu_write(pcdev, CAIFR, value);
818
819 sh_mobile_ceu_set_rect(icd);
820 mdelay(1);
821
822 dev_geo(icd->parent, "CFLCR 0x%x\n", pcdev->cflcr);
823 ceu_write(pcdev, CFLCR, pcdev->cflcr);
824
825 /*
826 * A few words about byte order (observed in Big Endian mode)
827 *
828 * In data fetch mode bytes are received in chunks of 8 bytes.
829 * D0, D1, D2, D3, D4, D5, D6, D7 (D0 received first)
830 *
831 * The data is however by default written to memory in reverse order:
832 * D7, D6, D5, D4, D3, D2, D1, D0 (D7 written to lowest byte)
833 *
834 * The lowest three bits of CDOCR allows us to do swapping,
835 * using 7 we swap the data bytes to match the incoming order:
836 * D0, D1, D2, D3, D4, D5, D6, D7
837 */
838 value = 0x00000007 | yuv_lineskip;
839
840 ceu_write(pcdev, CDOCR, value);
841 ceu_write(pcdev, CFWCR, 0); /* keep "datafetch firewall" disabled */
842
843 capture_restore(pcdev, capsr);
844
845 /* not in bundle mode: skip CBDSR, CDAYR2, CDACR2, CDBYR2, CDBCR2 */
846 return 0;
847 }
848
sh_mobile_ceu_try_bus_param(struct soc_camera_device * icd,unsigned char buswidth)849 static int sh_mobile_ceu_try_bus_param(struct soc_camera_device *icd,
850 unsigned char buswidth)
851 {
852 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
853 unsigned long common_flags = CEU_BUS_FLAGS;
854 struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,};
855 int ret;
856
857 ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg);
858 if (!ret)
859 common_flags = soc_mbus_config_compatible(&cfg,
860 common_flags);
861 else if (ret != -ENOIOCTLCMD)
862 return ret;
863
864 if (!common_flags || buswidth > 16)
865 return -EINVAL;
866
867 return 0;
868 }
869
870 static const struct soc_mbus_pixelfmt sh_mobile_ceu_formats[] = {
871 {
872 .fourcc = V4L2_PIX_FMT_NV12,
873 .name = "NV12",
874 .bits_per_sample = 8,
875 .packing = SOC_MBUS_PACKING_1_5X8,
876 .order = SOC_MBUS_ORDER_LE,
877 .layout = SOC_MBUS_LAYOUT_PLANAR_2Y_C,
878 }, {
879 .fourcc = V4L2_PIX_FMT_NV21,
880 .name = "NV21",
881 .bits_per_sample = 8,
882 .packing = SOC_MBUS_PACKING_1_5X8,
883 .order = SOC_MBUS_ORDER_LE,
884 .layout = SOC_MBUS_LAYOUT_PLANAR_2Y_C,
885 }, {
886 .fourcc = V4L2_PIX_FMT_NV16,
887 .name = "NV16",
888 .bits_per_sample = 8,
889 .packing = SOC_MBUS_PACKING_2X8_PADHI,
890 .order = SOC_MBUS_ORDER_LE,
891 .layout = SOC_MBUS_LAYOUT_PLANAR_Y_C,
892 }, {
893 .fourcc = V4L2_PIX_FMT_NV61,
894 .name = "NV61",
895 .bits_per_sample = 8,
896 .packing = SOC_MBUS_PACKING_2X8_PADHI,
897 .order = SOC_MBUS_ORDER_LE,
898 .layout = SOC_MBUS_LAYOUT_PLANAR_Y_C,
899 },
900 };
901
902 /* This will be corrected as we get more formats */
sh_mobile_ceu_packing_supported(const struct soc_mbus_pixelfmt * fmt)903 static bool sh_mobile_ceu_packing_supported(const struct soc_mbus_pixelfmt *fmt)
904 {
905 return fmt->packing == SOC_MBUS_PACKING_NONE ||
906 (fmt->bits_per_sample == 8 &&
907 fmt->packing == SOC_MBUS_PACKING_1_5X8) ||
908 (fmt->bits_per_sample == 8 &&
909 fmt->packing == SOC_MBUS_PACKING_2X8_PADHI) ||
910 (fmt->bits_per_sample > 8 &&
911 fmt->packing == SOC_MBUS_PACKING_EXTEND16);
912 }
913
ctrl_to_icd(struct v4l2_ctrl * ctrl)914 static struct soc_camera_device *ctrl_to_icd(struct v4l2_ctrl *ctrl)
915 {
916 return container_of(ctrl->handler, struct soc_camera_device,
917 ctrl_handler);
918 }
919
sh_mobile_ceu_s_ctrl(struct v4l2_ctrl * ctrl)920 static int sh_mobile_ceu_s_ctrl(struct v4l2_ctrl *ctrl)
921 {
922 struct soc_camera_device *icd = ctrl_to_icd(ctrl);
923 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
924 struct sh_mobile_ceu_dev *pcdev = ici->priv;
925
926 switch (ctrl->id) {
927 case V4L2_CID_SHARPNESS:
928 switch (icd->current_fmt->host_fmt->fourcc) {
929 case V4L2_PIX_FMT_NV12:
930 case V4L2_PIX_FMT_NV21:
931 case V4L2_PIX_FMT_NV16:
932 case V4L2_PIX_FMT_NV61:
933 ceu_write(pcdev, CLFCR, !ctrl->val);
934 return 0;
935 }
936 break;
937 }
938
939 return -EINVAL;
940 }
941
942 static const struct v4l2_ctrl_ops sh_mobile_ceu_ctrl_ops = {
943 .s_ctrl = sh_mobile_ceu_s_ctrl,
944 };
945
sh_mobile_ceu_get_formats(struct soc_camera_device * icd,unsigned int idx,struct soc_camera_format_xlate * xlate)946 static int sh_mobile_ceu_get_formats(struct soc_camera_device *icd, unsigned int idx,
947 struct soc_camera_format_xlate *xlate)
948 {
949 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
950 struct device *dev = icd->parent;
951 struct soc_camera_host *ici = to_soc_camera_host(dev);
952 struct sh_mobile_ceu_dev *pcdev = ici->priv;
953 int ret, k, n;
954 int formats = 0;
955 struct sh_mobile_ceu_cam *cam;
956 struct v4l2_subdev_mbus_code_enum code = {
957 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
958 .index = idx,
959 };
960 const struct soc_mbus_pixelfmt *fmt;
961
962 ret = v4l2_subdev_call(sd, pad, enum_mbus_code, NULL, &code);
963 if (ret < 0)
964 /* No more formats */
965 return 0;
966
967 fmt = soc_mbus_get_fmtdesc(code.code);
968 if (!fmt) {
969 dev_warn(dev, "unsupported format code #%u: %d\n", idx, code.code);
970 return 0;
971 }
972
973 ret = sh_mobile_ceu_try_bus_param(icd, fmt->bits_per_sample);
974 if (ret < 0)
975 return 0;
976
977 if (!icd->host_priv) {
978 struct v4l2_subdev_format fmt = {
979 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
980 };
981 struct v4l2_mbus_framefmt *mf = &fmt.format;
982 struct v4l2_rect rect;
983 int shift = 0;
984
985 /* Add our control */
986 v4l2_ctrl_new_std(&icd->ctrl_handler, &sh_mobile_ceu_ctrl_ops,
987 V4L2_CID_SHARPNESS, 0, 1, 1, 1);
988 if (icd->ctrl_handler.error)
989 return icd->ctrl_handler.error;
990
991 /* FIXME: subwindow is lost between close / open */
992
993 /* Cache current client geometry */
994 ret = soc_camera_client_g_rect(sd, &rect);
995 if (ret < 0)
996 return ret;
997
998 /* First time */
999 ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &fmt);
1000 if (ret < 0)
1001 return ret;
1002
1003 /*
1004 * All currently existing CEU implementations support 2560x1920
1005 * or larger frames. If the sensor is proposing too big a frame,
1006 * don't bother with possibly supportred by the CEU larger
1007 * sizes, just try VGA multiples. If needed, this can be
1008 * adjusted in the future.
1009 */
1010 while ((mf->width > pcdev->max_width ||
1011 mf->height > pcdev->max_height) && shift < 4) {
1012 /* Try 2560x1920, 1280x960, 640x480, 320x240 */
1013 mf->width = 2560 >> shift;
1014 mf->height = 1920 >> shift;
1015 ret = v4l2_device_call_until_err(sd->v4l2_dev,
1016 soc_camera_grp_id(icd), pad,
1017 set_fmt, NULL, &fmt);
1018 if (ret < 0)
1019 return ret;
1020 shift++;
1021 }
1022
1023 if (shift == 4) {
1024 dev_err(dev, "Failed to configure the client below %ux%x\n",
1025 mf->width, mf->height);
1026 return -EIO;
1027 }
1028
1029 dev_geo(dev, "camera fmt %ux%u\n", mf->width, mf->height);
1030
1031 cam = kzalloc(sizeof(*cam), GFP_KERNEL);
1032 if (!cam)
1033 return -ENOMEM;
1034
1035 /* We are called with current camera crop, initialise subrect with it */
1036 cam->rect = rect;
1037 cam->subrect = rect;
1038
1039 cam->width = mf->width;
1040 cam->height = mf->height;
1041
1042 icd->host_priv = cam;
1043 } else {
1044 cam = icd->host_priv;
1045 }
1046
1047 /* Beginning of a pass */
1048 if (!idx)
1049 cam->extra_fmt = NULL;
1050
1051 switch (code.code) {
1052 case MEDIA_BUS_FMT_UYVY8_2X8:
1053 case MEDIA_BUS_FMT_VYUY8_2X8:
1054 case MEDIA_BUS_FMT_YUYV8_2X8:
1055 case MEDIA_BUS_FMT_YVYU8_2X8:
1056 if (cam->extra_fmt)
1057 break;
1058
1059 /*
1060 * Our case is simple so far: for any of the above four camera
1061 * formats we add all our four synthesized NV* formats, so,
1062 * just marking the device with a single flag suffices. If
1063 * the format generation rules are more complex, you would have
1064 * to actually hang your already added / counted formats onto
1065 * the host_priv pointer and check whether the format you're
1066 * going to add now is already there.
1067 */
1068 cam->extra_fmt = sh_mobile_ceu_formats;
1069
1070 n = ARRAY_SIZE(sh_mobile_ceu_formats);
1071 formats += n;
1072 for (k = 0; xlate && k < n; k++) {
1073 xlate->host_fmt = &sh_mobile_ceu_formats[k];
1074 xlate->code = code.code;
1075 xlate++;
1076 dev_dbg(dev, "Providing format %s using code %d\n",
1077 sh_mobile_ceu_formats[k].name, code.code);
1078 }
1079 break;
1080 default:
1081 if (!sh_mobile_ceu_packing_supported(fmt))
1082 return 0;
1083 }
1084
1085 /* Generic pass-through */
1086 formats++;
1087 if (xlate) {
1088 xlate->host_fmt = fmt;
1089 xlate->code = code.code;
1090 xlate++;
1091 dev_dbg(dev, "Providing format %s in pass-through mode\n",
1092 fmt->name);
1093 }
1094
1095 return formats;
1096 }
1097
sh_mobile_ceu_put_formats(struct soc_camera_device * icd)1098 static void sh_mobile_ceu_put_formats(struct soc_camera_device *icd)
1099 {
1100 kfree(icd->host_priv);
1101 icd->host_priv = NULL;
1102 }
1103
1104 #define scale_down(size, scale) soc_camera_shift_scale(size, 12, scale)
1105 #define calc_generic_scale(in, out) soc_camera_calc_scale(in, 12, out)
1106
1107 /*
1108 * CEU can scale and crop, but we don't want to waste bandwidth and kill the
1109 * framerate by always requesting the maximum image from the client. See
1110 * Documentation/media/v4l-drivers/sh_mobile_ceu_camera.rst for a description of
1111 * scaling and cropping algorithms and for the meaning of referenced here steps.
1112 */
sh_mobile_ceu_set_selection(struct soc_camera_device * icd,struct v4l2_selection * sel)1113 static int sh_mobile_ceu_set_selection(struct soc_camera_device *icd,
1114 struct v4l2_selection *sel)
1115 {
1116 struct v4l2_rect *rect = &sel->r;
1117 struct device *dev = icd->parent;
1118 struct soc_camera_host *ici = to_soc_camera_host(dev);
1119 struct sh_mobile_ceu_dev *pcdev = ici->priv;
1120 struct v4l2_selection cam_sel;
1121 struct sh_mobile_ceu_cam *cam = icd->host_priv;
1122 struct v4l2_rect *cam_rect = &cam_sel.r;
1123 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1124 struct v4l2_subdev_format fmt = {
1125 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
1126 };
1127 struct v4l2_mbus_framefmt *mf = &fmt.format;
1128 unsigned int scale_cam_h, scale_cam_v, scale_ceu_h, scale_ceu_v,
1129 out_width, out_height;
1130 int interm_width, interm_height;
1131 u32 capsr, cflcr;
1132 int ret;
1133
1134 dev_geo(dev, "S_SELECTION(%ux%u@%u:%u)\n", rect->width, rect->height,
1135 rect->left, rect->top);
1136
1137 /* During camera cropping its output window can change too, stop CEU */
1138 capsr = capture_save_reset(pcdev);
1139 dev_dbg(dev, "CAPSR 0x%x, CFLCR 0x%x\n", capsr, pcdev->cflcr);
1140
1141 /*
1142 * 1. - 2. Apply iterative camera S_SELECTION for new input window, read back
1143 * actual camera rectangle.
1144 */
1145 ret = soc_camera_client_s_selection(sd, sel, &cam_sel,
1146 &cam->rect, &cam->subrect);
1147 if (ret < 0)
1148 return ret;
1149
1150 dev_geo(dev, "1-2: camera cropped to %ux%u@%u:%u\n",
1151 cam_rect->width, cam_rect->height,
1152 cam_rect->left, cam_rect->top);
1153
1154 /* On success cam_crop contains current camera crop */
1155
1156 /* 3. Retrieve camera output window */
1157 ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &fmt);
1158 if (ret < 0)
1159 return ret;
1160
1161 if (mf->width > pcdev->max_width || mf->height > pcdev->max_height)
1162 return -EINVAL;
1163
1164 /* 4. Calculate camera scales */
1165 scale_cam_h = calc_generic_scale(cam_rect->width, mf->width);
1166 scale_cam_v = calc_generic_scale(cam_rect->height, mf->height);
1167
1168 /* Calculate intermediate window */
1169 interm_width = scale_down(rect->width, scale_cam_h);
1170 interm_height = scale_down(rect->height, scale_cam_v);
1171
1172 if (interm_width < icd->user_width) {
1173 u32 new_scale_h;
1174
1175 new_scale_h = calc_generic_scale(rect->width, icd->user_width);
1176
1177 mf->width = scale_down(cam_rect->width, new_scale_h);
1178 }
1179
1180 if (interm_height < icd->user_height) {
1181 u32 new_scale_v;
1182
1183 new_scale_v = calc_generic_scale(rect->height, icd->user_height);
1184
1185 mf->height = scale_down(cam_rect->height, new_scale_v);
1186 }
1187
1188 if (interm_width < icd->user_width || interm_height < icd->user_height) {
1189 ret = v4l2_device_call_until_err(sd->v4l2_dev,
1190 soc_camera_grp_id(icd), pad,
1191 set_fmt, NULL, &fmt);
1192 if (ret < 0)
1193 return ret;
1194
1195 dev_geo(dev, "New camera output %ux%u\n", mf->width, mf->height);
1196 scale_cam_h = calc_generic_scale(cam_rect->width, mf->width);
1197 scale_cam_v = calc_generic_scale(cam_rect->height, mf->height);
1198 interm_width = scale_down(rect->width, scale_cam_h);
1199 interm_height = scale_down(rect->height, scale_cam_v);
1200 }
1201
1202 /* Cache camera output window */
1203 cam->width = mf->width;
1204 cam->height = mf->height;
1205
1206 if (pcdev->image_mode) {
1207 out_width = min(interm_width, icd->user_width);
1208 out_height = min(interm_height, icd->user_height);
1209 } else {
1210 out_width = interm_width;
1211 out_height = interm_height;
1212 }
1213
1214 /*
1215 * 5. Calculate CEU scales from camera scales from results of (5) and
1216 * the user window
1217 */
1218 scale_ceu_h = calc_scale(interm_width, &out_width);
1219 scale_ceu_v = calc_scale(interm_height, &out_height);
1220
1221 dev_geo(dev, "5: CEU scales %u:%u\n", scale_ceu_h, scale_ceu_v);
1222
1223 /* Apply CEU scales. */
1224 cflcr = scale_ceu_h | (scale_ceu_v << 16);
1225 if (cflcr != pcdev->cflcr) {
1226 pcdev->cflcr = cflcr;
1227 ceu_write(pcdev, CFLCR, cflcr);
1228 }
1229
1230 icd->user_width = out_width & ~3;
1231 icd->user_height = out_height & ~3;
1232 /* Offsets are applied at the CEU scaling filter input */
1233 cam->ceu_left = scale_down(rect->left - cam_rect->left, scale_cam_h) & ~1;
1234 cam->ceu_top = scale_down(rect->top - cam_rect->top, scale_cam_v) & ~1;
1235
1236 /* 6. Use CEU cropping to crop to the new window. */
1237 sh_mobile_ceu_set_rect(icd);
1238
1239 cam->subrect = *rect;
1240
1241 dev_geo(dev, "6: CEU cropped to %ux%u@%u:%u\n",
1242 icd->user_width, icd->user_height,
1243 cam->ceu_left, cam->ceu_top);
1244
1245 /* Restore capture. The CE bit can be cleared by the hardware */
1246 if (pcdev->active)
1247 capsr |= 1;
1248 capture_restore(pcdev, capsr);
1249
1250 /* Even if only camera cropping succeeded */
1251 return ret;
1252 }
1253
sh_mobile_ceu_get_selection(struct soc_camera_device * icd,struct v4l2_selection * sel)1254 static int sh_mobile_ceu_get_selection(struct soc_camera_device *icd,
1255 struct v4l2_selection *sel)
1256 {
1257 struct sh_mobile_ceu_cam *cam = icd->host_priv;
1258
1259 sel->r = cam->subrect;
1260
1261 return 0;
1262 }
1263
1264 /* Similar to set_crop multistage iterative algorithm */
sh_mobile_ceu_set_fmt(struct soc_camera_device * icd,struct v4l2_format * f)1265 static int sh_mobile_ceu_set_fmt(struct soc_camera_device *icd,
1266 struct v4l2_format *f)
1267 {
1268 struct device *dev = icd->parent;
1269 struct soc_camera_host *ici = to_soc_camera_host(dev);
1270 struct sh_mobile_ceu_dev *pcdev = ici->priv;
1271 struct sh_mobile_ceu_cam *cam = icd->host_priv;
1272 struct v4l2_pix_format *pix = &f->fmt.pix;
1273 struct v4l2_mbus_framefmt mf;
1274 __u32 pixfmt = pix->pixelformat;
1275 const struct soc_camera_format_xlate *xlate;
1276 unsigned int ceu_sub_width = pcdev->max_width,
1277 ceu_sub_height = pcdev->max_height;
1278 u16 scale_v, scale_h;
1279 int ret;
1280 bool image_mode;
1281 enum v4l2_field field;
1282
1283 switch (pix->field) {
1284 default:
1285 pix->field = V4L2_FIELD_NONE;
1286 /* fall-through */
1287 case V4L2_FIELD_INTERLACED_TB:
1288 case V4L2_FIELD_INTERLACED_BT:
1289 case V4L2_FIELD_NONE:
1290 field = pix->field;
1291 break;
1292 case V4L2_FIELD_INTERLACED:
1293 field = V4L2_FIELD_INTERLACED_TB;
1294 break;
1295 }
1296
1297 xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
1298 if (!xlate) {
1299 dev_warn(dev, "Format %x not found\n", pixfmt);
1300 return -EINVAL;
1301 }
1302
1303 /* 1.-4. Calculate desired client output geometry */
1304 soc_camera_calc_client_output(icd, &cam->rect, &cam->subrect, pix, &mf, 12);
1305 mf.field = pix->field;
1306 mf.colorspace = pix->colorspace;
1307 mf.code = xlate->code;
1308
1309 switch (pixfmt) {
1310 case V4L2_PIX_FMT_NV12:
1311 case V4L2_PIX_FMT_NV21:
1312 case V4L2_PIX_FMT_NV16:
1313 case V4L2_PIX_FMT_NV61:
1314 image_mode = true;
1315 break;
1316 default:
1317 image_mode = false;
1318 }
1319
1320 dev_geo(dev, "S_FMT(pix=0x%x, fld 0x%x, code 0x%x, %ux%u)\n", pixfmt, mf.field, mf.code,
1321 pix->width, pix->height);
1322
1323 dev_geo(dev, "4: request camera output %ux%u\n", mf.width, mf.height);
1324
1325 /* 5. - 9. */
1326 ret = soc_camera_client_scale(icd, &cam->rect, &cam->subrect,
1327 &mf, &ceu_sub_width, &ceu_sub_height,
1328 image_mode && V4L2_FIELD_NONE == field, 12);
1329
1330 dev_geo(dev, "5-9: client scale return %d\n", ret);
1331
1332 /* Done with the camera. Now see if we can improve the result */
1333
1334 dev_geo(dev, "fmt %ux%u, requested %ux%u\n",
1335 mf.width, mf.height, pix->width, pix->height);
1336 if (ret < 0)
1337 return ret;
1338
1339 if (mf.code != xlate->code)
1340 return -EINVAL;
1341
1342 /* 9. Prepare CEU crop */
1343 cam->width = mf.width;
1344 cam->height = mf.height;
1345
1346 /* 10. Use CEU scaling to scale to the requested user window. */
1347
1348 /* We cannot scale up */
1349 if (pix->width > ceu_sub_width)
1350 ceu_sub_width = pix->width;
1351
1352 if (pix->height > ceu_sub_height)
1353 ceu_sub_height = pix->height;
1354
1355 pix->colorspace = mf.colorspace;
1356
1357 if (image_mode) {
1358 /* Scale pix->{width x height} down to width x height */
1359 scale_h = calc_scale(ceu_sub_width, &pix->width);
1360 scale_v = calc_scale(ceu_sub_height, &pix->height);
1361 } else {
1362 pix->width = ceu_sub_width;
1363 pix->height = ceu_sub_height;
1364 scale_h = 0;
1365 scale_v = 0;
1366 }
1367
1368 pcdev->cflcr = scale_h | (scale_v << 16);
1369
1370 /*
1371 * We have calculated CFLCR, the actual configuration will be performed
1372 * in sh_mobile_ceu_set_bus_param()
1373 */
1374
1375 dev_geo(dev, "10: W: %u : 0x%x = %u, H: %u : 0x%x = %u\n",
1376 ceu_sub_width, scale_h, pix->width,
1377 ceu_sub_height, scale_v, pix->height);
1378
1379 cam->code = xlate->code;
1380 icd->current_fmt = xlate;
1381
1382 pcdev->field = field;
1383 pcdev->image_mode = image_mode;
1384
1385 /* CFSZR requirement */
1386 pix->width &= ~3;
1387 pix->height &= ~3;
1388
1389 return 0;
1390 }
1391
1392 #define CEU_CHDW_MAX 8188U /* Maximum line stride */
1393
sh_mobile_ceu_try_fmt(struct soc_camera_device * icd,struct v4l2_format * f)1394 static int sh_mobile_ceu_try_fmt(struct soc_camera_device *icd,
1395 struct v4l2_format *f)
1396 {
1397 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
1398 struct sh_mobile_ceu_dev *pcdev = ici->priv;
1399 const struct soc_camera_format_xlate *xlate;
1400 struct v4l2_pix_format *pix = &f->fmt.pix;
1401 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1402 struct v4l2_subdev_pad_config pad_cfg;
1403 struct v4l2_subdev_format format = {
1404 .which = V4L2_SUBDEV_FORMAT_TRY,
1405 };
1406 struct v4l2_mbus_framefmt *mf = &format.format;
1407 __u32 pixfmt = pix->pixelformat;
1408 int width, height;
1409 int ret;
1410
1411 dev_geo(icd->parent, "TRY_FMT(pix=0x%x, %ux%u)\n",
1412 pixfmt, pix->width, pix->height);
1413
1414 xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
1415 if (!xlate) {
1416 xlate = icd->current_fmt;
1417 dev_dbg(icd->parent, "Format %x not found, keeping %x\n",
1418 pixfmt, xlate->host_fmt->fourcc);
1419 pixfmt = xlate->host_fmt->fourcc;
1420 pix->pixelformat = pixfmt;
1421 pix->colorspace = icd->colorspace;
1422 }
1423
1424 /* FIXME: calculate using depth and bus width */
1425
1426 /* CFSZR requires height and width to be 4-pixel aligned */
1427 v4l_bound_align_image(&pix->width, 2, pcdev->max_width, 2,
1428 &pix->height, 4, pcdev->max_height, 2, 0);
1429
1430 width = pix->width;
1431 height = pix->height;
1432
1433 /* limit to sensor capabilities */
1434 mf->width = pix->width;
1435 mf->height = pix->height;
1436 mf->field = pix->field;
1437 mf->code = xlate->code;
1438 mf->colorspace = pix->colorspace;
1439
1440 ret = v4l2_device_call_until_err(sd->v4l2_dev, soc_camera_grp_id(icd),
1441 pad, set_fmt, &pad_cfg, &format);
1442 if (ret < 0)
1443 return ret;
1444
1445 pix->width = mf->width;
1446 pix->height = mf->height;
1447 pix->field = mf->field;
1448 pix->colorspace = mf->colorspace;
1449
1450 switch (pixfmt) {
1451 case V4L2_PIX_FMT_NV12:
1452 case V4L2_PIX_FMT_NV21:
1453 case V4L2_PIX_FMT_NV16:
1454 case V4L2_PIX_FMT_NV61:
1455 /* FIXME: check against rect_max after converting soc-camera */
1456 /* We can scale precisely, need a bigger image from camera */
1457 if (pix->width < width || pix->height < height) {
1458 /*
1459 * We presume, the sensor behaves sanely, i.e., if
1460 * requested a bigger rectangle, it will not return a
1461 * smaller one.
1462 */
1463 mf->width = pcdev->max_width;
1464 mf->height = pcdev->max_height;
1465 ret = v4l2_device_call_until_err(sd->v4l2_dev,
1466 soc_camera_grp_id(icd), pad,
1467 set_fmt, &pad_cfg, &format);
1468 if (ret < 0) {
1469 /* Shouldn't actually happen... */
1470 dev_err(icd->parent,
1471 "FIXME: client try_fmt() = %d\n", ret);
1472 return ret;
1473 }
1474 }
1475 /* We will scale exactly */
1476 if (mf->width > width)
1477 pix->width = width;
1478 if (mf->height > height)
1479 pix->height = height;
1480
1481 pix->bytesperline = max(pix->bytesperline, pix->width);
1482 pix->bytesperline = min(pix->bytesperline, CEU_CHDW_MAX);
1483 pix->bytesperline &= ~3;
1484 break;
1485
1486 default:
1487 /* Configurable stride isn't supported in pass-through mode. */
1488 pix->bytesperline = 0;
1489 }
1490
1491 pix->width &= ~3;
1492 pix->height &= ~3;
1493 pix->sizeimage = 0;
1494
1495 dev_geo(icd->parent, "%s(): return %d, fmt 0x%x, %ux%u\n",
1496 __func__, ret, pix->pixelformat, pix->width, pix->height);
1497
1498 return ret;
1499 }
1500
sh_mobile_ceu_set_liveselection(struct soc_camera_device * icd,struct v4l2_selection * sel)1501 static int sh_mobile_ceu_set_liveselection(struct soc_camera_device *icd,
1502 struct v4l2_selection *sel)
1503 {
1504 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1505 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
1506 struct sh_mobile_ceu_dev *pcdev = ici->priv;
1507 u32 out_width = icd->user_width, out_height = icd->user_height;
1508 int ret;
1509
1510 /* Freeze queue */
1511 pcdev->frozen = 1;
1512 /* Wait for frame */
1513 ret = wait_for_completion_interruptible(&pcdev->complete);
1514 /* Stop the client */
1515 ret = v4l2_subdev_call(sd, video, s_stream, 0);
1516 if (ret < 0)
1517 dev_warn(icd->parent,
1518 "Client failed to stop the stream: %d\n", ret);
1519 else
1520 /* Do the crop, if it fails, there's nothing more we can do */
1521 sh_mobile_ceu_set_selection(icd, sel);
1522
1523 dev_geo(icd->parent, "Output after crop: %ux%u\n", icd->user_width, icd->user_height);
1524
1525 if (icd->user_width != out_width || icd->user_height != out_height) {
1526 struct v4l2_format f = {
1527 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
1528 .fmt.pix = {
1529 .width = out_width,
1530 .height = out_height,
1531 .pixelformat = icd->current_fmt->host_fmt->fourcc,
1532 .field = pcdev->field,
1533 .colorspace = icd->colorspace,
1534 },
1535 };
1536 ret = sh_mobile_ceu_set_fmt(icd, &f);
1537 if (!ret && (out_width != f.fmt.pix.width ||
1538 out_height != f.fmt.pix.height))
1539 ret = -EINVAL;
1540 if (!ret) {
1541 icd->user_width = out_width & ~3;
1542 icd->user_height = out_height & ~3;
1543 ret = sh_mobile_ceu_set_bus_param(icd);
1544 }
1545 }
1546
1547 /* Thaw the queue */
1548 pcdev->frozen = 0;
1549 spin_lock_irq(&pcdev->lock);
1550 sh_mobile_ceu_capture(pcdev);
1551 spin_unlock_irq(&pcdev->lock);
1552 /* Start the client */
1553 ret = v4l2_subdev_call(sd, video, s_stream, 1);
1554 return ret;
1555 }
1556
sh_mobile_ceu_poll(struct file * file,poll_table * pt)1557 static __poll_t sh_mobile_ceu_poll(struct file *file, poll_table *pt)
1558 {
1559 struct soc_camera_device *icd = file->private_data;
1560
1561 return vb2_poll(&icd->vb2_vidq, file, pt);
1562 }
1563
sh_mobile_ceu_querycap(struct soc_camera_host * ici,struct v4l2_capability * cap)1564 static int sh_mobile_ceu_querycap(struct soc_camera_host *ici,
1565 struct v4l2_capability *cap)
1566 {
1567 strlcpy(cap->card, "SuperH_Mobile_CEU", sizeof(cap->card));
1568 strlcpy(cap->driver, "sh_mobile_ceu", sizeof(cap->driver));
1569 strlcpy(cap->bus_info, "platform:sh_mobile_ceu", sizeof(cap->bus_info));
1570 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
1571 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
1572
1573 return 0;
1574 }
1575
sh_mobile_ceu_init_videobuf(struct vb2_queue * q,struct soc_camera_device * icd)1576 static int sh_mobile_ceu_init_videobuf(struct vb2_queue *q,
1577 struct soc_camera_device *icd)
1578 {
1579 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
1580
1581 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1582 q->io_modes = VB2_MMAP | VB2_USERPTR;
1583 q->drv_priv = icd;
1584 q->ops = &sh_mobile_ceu_videobuf_ops;
1585 q->mem_ops = &vb2_dma_contig_memops;
1586 q->buf_struct_size = sizeof(struct sh_mobile_ceu_buffer);
1587 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1588 q->lock = &ici->host_lock;
1589 q->dev = ici->v4l2_dev.dev;
1590
1591 return vb2_queue_init(q);
1592 }
1593
1594 static struct soc_camera_host_ops sh_mobile_ceu_host_ops = {
1595 .owner = THIS_MODULE,
1596 .add = sh_mobile_ceu_add_device,
1597 .remove = sh_mobile_ceu_remove_device,
1598 .clock_start = sh_mobile_ceu_clock_start,
1599 .clock_stop = sh_mobile_ceu_clock_stop,
1600 .get_formats = sh_mobile_ceu_get_formats,
1601 .put_formats = sh_mobile_ceu_put_formats,
1602 .get_selection = sh_mobile_ceu_get_selection,
1603 .set_selection = sh_mobile_ceu_set_selection,
1604 .set_liveselection = sh_mobile_ceu_set_liveselection,
1605 .set_fmt = sh_mobile_ceu_set_fmt,
1606 .try_fmt = sh_mobile_ceu_try_fmt,
1607 .poll = sh_mobile_ceu_poll,
1608 .querycap = sh_mobile_ceu_querycap,
1609 .set_bus_param = sh_mobile_ceu_set_bus_param,
1610 .init_videobuf2 = sh_mobile_ceu_init_videobuf,
1611 };
1612
1613 struct bus_wait {
1614 struct notifier_block notifier;
1615 struct completion completion;
1616 struct device *dev;
1617 };
1618
bus_notify(struct notifier_block * nb,unsigned long action,void * data)1619 static int bus_notify(struct notifier_block *nb,
1620 unsigned long action, void *data)
1621 {
1622 struct device *dev = data;
1623 struct bus_wait *wait = container_of(nb, struct bus_wait, notifier);
1624
1625 if (wait->dev != dev)
1626 return NOTIFY_DONE;
1627
1628 switch (action) {
1629 case BUS_NOTIFY_UNBOUND_DRIVER:
1630 /* Protect from module unloading */
1631 wait_for_completion(&wait->completion);
1632 return NOTIFY_OK;
1633 }
1634 return NOTIFY_DONE;
1635 }
1636
sh_mobile_ceu_probe(struct platform_device * pdev)1637 static int sh_mobile_ceu_probe(struct platform_device *pdev)
1638 {
1639 struct sh_mobile_ceu_dev *pcdev;
1640 struct resource *res;
1641 void __iomem *base;
1642 unsigned int irq;
1643 int err;
1644 struct bus_wait wait = {
1645 .completion = COMPLETION_INITIALIZER_ONSTACK(wait.completion),
1646 .notifier.notifier_call = bus_notify,
1647 };
1648
1649 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1650 irq = platform_get_irq(pdev, 0);
1651 if (!res || (int)irq <= 0) {
1652 dev_err(&pdev->dev, "Not enough CEU platform resources.\n");
1653 return -ENODEV;
1654 }
1655
1656 pcdev = devm_kzalloc(&pdev->dev, sizeof(*pcdev), GFP_KERNEL);
1657 if (!pcdev) {
1658 dev_err(&pdev->dev, "Could not allocate pcdev\n");
1659 return -ENOMEM;
1660 }
1661
1662 INIT_LIST_HEAD(&pcdev->capture);
1663 spin_lock_init(&pcdev->lock);
1664 init_completion(&pcdev->complete);
1665
1666 pcdev->pdata = pdev->dev.platform_data;
1667 if (!pcdev->pdata && !pdev->dev.of_node) {
1668 dev_err(&pdev->dev, "CEU platform data not set.\n");
1669 return -EINVAL;
1670 }
1671
1672 /* TODO: implement per-device bus flags */
1673 if (pcdev->pdata) {
1674 pcdev->max_width = pcdev->pdata->max_width;
1675 pcdev->max_height = pcdev->pdata->max_height;
1676 pcdev->flags = pcdev->pdata->flags;
1677 }
1678 pcdev->field = V4L2_FIELD_NONE;
1679
1680 if (!pcdev->max_width) {
1681 unsigned int v;
1682 err = of_property_read_u32(pdev->dev.of_node, "renesas,max-width", &v);
1683 if (!err)
1684 pcdev->max_width = v;
1685
1686 if (!pcdev->max_width)
1687 pcdev->max_width = 2560;
1688 }
1689 if (!pcdev->max_height) {
1690 unsigned int v;
1691 err = of_property_read_u32(pdev->dev.of_node, "renesas,max-height", &v);
1692 if (!err)
1693 pcdev->max_height = v;
1694
1695 if (!pcdev->max_height)
1696 pcdev->max_height = 1920;
1697 }
1698
1699 base = devm_ioremap_resource(&pdev->dev, res);
1700 if (IS_ERR(base))
1701 return PTR_ERR(base);
1702
1703 pcdev->irq = irq;
1704 pcdev->base = base;
1705 pcdev->video_limit = 0; /* only enabled if second resource exists */
1706
1707 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1708 if (res) {
1709 err = dma_declare_coherent_memory(&pdev->dev, res->start,
1710 res->start,
1711 resource_size(res),
1712 DMA_MEMORY_EXCLUSIVE);
1713 if (err) {
1714 dev_err(&pdev->dev, "Unable to declare CEU memory.\n");
1715 return err;
1716 }
1717
1718 pcdev->video_limit = resource_size(res);
1719 }
1720
1721 /* request irq */
1722 err = devm_request_irq(&pdev->dev, pcdev->irq, sh_mobile_ceu_irq,
1723 0, dev_name(&pdev->dev), pcdev);
1724 if (err) {
1725 dev_err(&pdev->dev, "Unable to register CEU interrupt.\n");
1726 goto exit_release_mem;
1727 }
1728
1729 pm_suspend_ignore_children(&pdev->dev, true);
1730 pm_runtime_enable(&pdev->dev);
1731 pm_runtime_resume(&pdev->dev);
1732
1733 pcdev->ici.priv = pcdev;
1734 pcdev->ici.v4l2_dev.dev = &pdev->dev;
1735 pcdev->ici.nr = pdev->id;
1736 pcdev->ici.drv_name = dev_name(&pdev->dev);
1737 pcdev->ici.ops = &sh_mobile_ceu_host_ops;
1738 pcdev->ici.capabilities = SOCAM_HOST_CAP_STRIDE;
1739
1740 if (pcdev->pdata && pcdev->pdata->asd_sizes) {
1741 pcdev->ici.asd = pcdev->pdata->asd;
1742 pcdev->ici.asd_sizes = pcdev->pdata->asd_sizes;
1743 }
1744
1745 err = soc_camera_host_register(&pcdev->ici);
1746 if (err)
1747 goto exit_free_clk;
1748
1749 return 0;
1750
1751 exit_free_clk:
1752 pm_runtime_disable(&pdev->dev);
1753 exit_release_mem:
1754 if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
1755 dma_release_declared_memory(&pdev->dev);
1756 return err;
1757 }
1758
sh_mobile_ceu_remove(struct platform_device * pdev)1759 static int sh_mobile_ceu_remove(struct platform_device *pdev)
1760 {
1761 struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev);
1762
1763 soc_camera_host_unregister(soc_host);
1764 pm_runtime_disable(&pdev->dev);
1765 if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
1766 dma_release_declared_memory(&pdev->dev);
1767
1768 return 0;
1769 }
1770
sh_mobile_ceu_runtime_nop(struct device * dev)1771 static int sh_mobile_ceu_runtime_nop(struct device *dev)
1772 {
1773 /* Runtime PM callback shared between ->runtime_suspend()
1774 * and ->runtime_resume(). Simply returns success.
1775 *
1776 * This driver re-initializes all registers after
1777 * pm_runtime_get_sync() anyway so there is no need
1778 * to save and restore registers here.
1779 */
1780 return 0;
1781 }
1782
1783 static const struct dev_pm_ops sh_mobile_ceu_dev_pm_ops = {
1784 .runtime_suspend = sh_mobile_ceu_runtime_nop,
1785 .runtime_resume = sh_mobile_ceu_runtime_nop,
1786 };
1787
1788 static const struct of_device_id sh_mobile_ceu_of_match[] = {
1789 { .compatible = "renesas,sh-mobile-ceu" },
1790 { }
1791 };
1792 MODULE_DEVICE_TABLE(of, sh_mobile_ceu_of_match);
1793
1794 static struct platform_driver sh_mobile_ceu_driver = {
1795 .driver = {
1796 .name = "sh_mobile_ceu",
1797 .pm = &sh_mobile_ceu_dev_pm_ops,
1798 .of_match_table = sh_mobile_ceu_of_match,
1799 },
1800 .probe = sh_mobile_ceu_probe,
1801 .remove = sh_mobile_ceu_remove,
1802 };
1803
1804 module_platform_driver(sh_mobile_ceu_driver);
1805
1806 MODULE_DESCRIPTION("SuperH Mobile CEU driver");
1807 MODULE_AUTHOR("Magnus Damm");
1808 MODULE_LICENSE("GPL");
1809 MODULE_VERSION("0.1.0");
1810 MODULE_ALIAS("platform:sh_mobile_ceu");
1811
