]> git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blob - drivers/media/video/pxa_camera.c
projects / mirror_ubuntu-bionic-kernel.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge branch 'linus' into test
[mirror_ubuntu-bionic-kernel.git] / drivers / media / video / pxa_camera.c
1 /*
2 * V4L2 Driver for PXA camera host
3 *
4 * Copyright (C) 2006, Sascha Hauer, Pengutronix
5 * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 */
12
13 #include <linux/init.h>
14 #include <linux/module.h>
15 #include <linux/io.h>
16 #include <linux/delay.h>
17 #include <linux/dma-mapping.h>
18 #include <linux/errno.h>
19 #include <linux/fs.h>
20 #include <linux/interrupt.h>
21 #include <linux/kernel.h>
22 #include <linux/mm.h>
23 #include <linux/moduleparam.h>
24 #include <linux/time.h>
25 #include <linux/version.h>
26 #include <linux/device.h>
27 #include <linux/platform_device.h>
28 #include <linux/mutex.h>
29 #include <linux/clk.h>
30
31 #include <media/v4l2-common.h>
32 #include <media/v4l2-dev.h>
33 #include <media/videobuf-dma-sg.h>
34 #include <media/soc_camera.h>
35
36 #include <linux/videodev2.h>
37
38 #include <asm/dma.h>
39 #include <mach/pxa-regs.h>
40 #include <mach/camera.h>
41
42 #define PXA_CAM_VERSION_CODE KERNEL_VERSION(0, 0, 5)
43 #define PXA_CAM_DRV_NAME "pxa27x-camera"
44
45 #define CICR0_SIM_MP (0 << 24)
46 #define CICR0_SIM_SP (1 << 24)
47 #define CICR0_SIM_MS (2 << 24)
48 #define CICR0_SIM_EP (3 << 24)
49 #define CICR0_SIM_ES (4 << 24)
50
51 #define CICR1_DW_VAL(x) ((x) & CICR1_DW) /* Data bus width */
52 #define CICR1_PPL_VAL(x) (((x) << 15) & CICR1_PPL) /* Pixels per line */
53 #define CICR1_COLOR_SP_VAL(x) (((x) << 3) & CICR1_COLOR_SP) /* color space */
54 #define CICR1_RGB_BPP_VAL(x) (((x) << 7) & CICR1_RGB_BPP) /* bpp for rgb */
55 #define CICR1_RGBT_CONV_VAL(x) (((x) << 29) & CICR1_RGBT_CONV) /* rgbt conv */
56
57 #define CICR2_BLW_VAL(x) (((x) << 24) & CICR2_BLW) /* Beginning-of-line pixel clock wait count */
58 #define CICR2_ELW_VAL(x) (((x) << 16) & CICR2_ELW) /* End-of-line pixel clock wait count */
59 #define CICR2_HSW_VAL(x) (((x) << 10) & CICR2_HSW) /* Horizontal sync pulse width */
60 #define CICR2_BFPW_VAL(x) (((x) << 3) & CICR2_BFPW) /* Beginning-of-frame pixel clock wait count */
61 #define CICR2_FSW_VAL(x) (((x) << 0) & CICR2_FSW) /* Frame stabilization wait count */
62
63 #define CICR3_BFW_VAL(x) (((x) << 24) & CICR3_BFW) /* Beginning-of-frame line clock wait count */
64 #define CICR3_EFW_VAL(x) (((x) << 16) & CICR3_EFW) /* End-of-frame line clock wait count */
65 #define CICR3_VSW_VAL(x) (((x) << 11) & CICR3_VSW) /* Vertical sync pulse width */
66 #define CICR3_LPF_VAL(x) (((x) << 0) & CICR3_LPF) /* Lines per frame */
67
68 #define CICR0_IRQ_MASK (CICR0_TOM | CICR0_RDAVM | CICR0_FEM | CICR0_EOLM | \
69 CICR0_PERRM | CICR0_QDM | CICR0_CDM | CICR0_SOFM | \
70 CICR0_EOFM | CICR0_FOM)
71
72 static DEFINE_MUTEX(camera_lock);
73
74 /*
75 * Structures
76 */
77 enum pxa_camera_active_dma {
78 DMA_Y = 0x1,
79 DMA_U = 0x2,
80 DMA_V = 0x4,
81 };
82
83 /* descriptor needed for the PXA DMA engine */
84 struct pxa_cam_dma {
85 dma_addr_t sg_dma;
86 struct pxa_dma_desc *sg_cpu;
87 size_t sg_size;
88 int sglen;
89 };
90
91 /* buffer for one video frame */
92 struct pxa_buffer {
93 /* common v4l buffer stuff -- must be first */
94 struct videobuf_buffer vb;
95
96 const struct soc_camera_data_format *fmt;
97
98 /* our descriptor lists for Y, U and V channels */
99 struct pxa_cam_dma dmas[3];
100
101 int inwork;
102
103 enum pxa_camera_active_dma active_dma;
104 };
105
106 struct pxa_camera_dev {
107 struct device *dev;
108 /* PXA27x is only supposed to handle one camera on its Quick Capture
109 * interface. If anyone ever builds hardware to enable more than
110 * one camera, they will have to modify this driver too */
111 struct soc_camera_device *icd;
112 struct clk *clk;
113
114 unsigned int irq;
115 void __iomem *base;
116
117 int channels;
118 unsigned int dma_chans[3];
119
120 struct pxacamera_platform_data *pdata;
121 struct resource *res;
122 unsigned long platform_flags;
123 unsigned long platform_mclk_10khz;
124
125 struct list_head capture;
126
127 spinlock_t lock;
128
129 struct pxa_buffer *active;
130 struct pxa_dma_desc *sg_tail[3];
131
132 u32 save_cicr[5];
133 };
134
135 static const char *pxa_cam_driver_description = "PXA_Camera";
136
137 static unsigned int vid_limit = 16; /* Video memory limit, in Mb */
138
139 /*
140 * Videobuf operations
141 */
142 static int pxa_videobuf_setup(struct videobuf_queue *vq, unsigned int *count,
143 unsigned int *size)
144 {
145 struct soc_camera_device *icd = vq->priv_data;
146 struct soc_camera_host *ici =
147 to_soc_camera_host(icd->dev.parent);
148 struct pxa_camera_dev *pcdev = ici->priv;
149
150 dev_dbg(&icd->dev, "count=%d, size=%d\n", *count, *size);
151
152 /* planar capture requires Y, U and V buffers to be page aligned */
153 if (pcdev->channels == 3) {
154 *size = PAGE_ALIGN(icd->width * icd->height); /* Y pages */
155 *size += PAGE_ALIGN(icd->width * icd->height / 2); /* U pages */
156 *size += PAGE_ALIGN(icd->width * icd->height / 2); /* V pages */
157 } else {
158 *size = icd->width * icd->height *
159 ((icd->current_fmt->depth + 7) >> 3);
160 }
161
162 if (0 == *count)
163 *count = 32;
164 while (*size * *count > vid_limit * 1024 * 1024)
165 (*count)--;
166
167 return 0;
168 }
169
170 static void free_buffer(struct videobuf_queue *vq, struct pxa_buffer *buf)
171 {
172 struct soc_camera_device *icd = vq->priv_data;
173 struct soc_camera_host *ici =
174 to_soc_camera_host(icd->dev.parent);
175 struct pxa_camera_dev *pcdev = ici->priv;
176 struct videobuf_dmabuf *dma = videobuf_to_dma(&buf->vb);
177 int i;
178
179 BUG_ON(in_interrupt());
180
181 dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__,
182 &buf->vb, buf->vb.baddr, buf->vb.bsize);
183
184 /* This waits until this buffer is out of danger, i.e., until it is no
185 * longer in STATE_QUEUED or STATE_ACTIVE */
186 videobuf_waiton(&buf->vb, 0, 0);
187 videobuf_dma_unmap(vq, dma);
188 videobuf_dma_free(dma);
189
190 for (i = 0; i < ARRAY_SIZE(buf->dmas); i++) {
191 if (buf->dmas[i].sg_cpu)
192 dma_free_coherent(pcdev->dev, buf->dmas[i].sg_size,
193 buf->dmas[i].sg_cpu,
194 buf->dmas[i].sg_dma);
195 buf->dmas[i].sg_cpu = NULL;
196 }
197
198 buf->vb.state = VIDEOBUF_NEEDS_INIT;
199 }
200
201 static int pxa_init_dma_channel(struct pxa_camera_dev *pcdev,
202 struct pxa_buffer *buf,
203 struct videobuf_dmabuf *dma, int channel,
204 int sglen, int sg_start, int cibr,
205 unsigned int size)
206 {
207 struct pxa_cam_dma *pxa_dma = &buf->dmas[channel];
208 int i;
209
210 if (pxa_dma->sg_cpu)
211 dma_free_coherent(pcdev->dev, pxa_dma->sg_size,
212 pxa_dma->sg_cpu, pxa_dma->sg_dma);
213
214 pxa_dma->sg_size = (sglen + 1) * sizeof(struct pxa_dma_desc);
215 pxa_dma->sg_cpu = dma_alloc_coherent(pcdev->dev, pxa_dma->sg_size,
216 &pxa_dma->sg_dma, GFP_KERNEL);
217 if (!pxa_dma->sg_cpu)
218 return -ENOMEM;
219
220 pxa_dma->sglen = sglen;
221
222 for (i = 0; i < sglen; i++) {
223 int sg_i = sg_start + i;
224 struct scatterlist *sg = dma->sglist;
225 unsigned int dma_len = sg_dma_len(&sg[sg_i]), xfer_len;
226
227 pxa_dma->sg_cpu[i].dsadr = pcdev->res->start + cibr;
228 pxa_dma->sg_cpu[i].dtadr = sg_dma_address(&sg[sg_i]);
229
230 /* PXA27x Developer's Manual 27.4.4.1: round up to 8 bytes */
231 xfer_len = (min(dma_len, size) + 7) & ~7;
232
233 pxa_dma->sg_cpu[i].dcmd =
234 DCMD_FLOWSRC | DCMD_BURST8 | DCMD_INCTRGADDR | xfer_len;
235 size -= dma_len;
236 pxa_dma->sg_cpu[i].ddadr =
237 pxa_dma->sg_dma + (i + 1) * sizeof(struct pxa_dma_desc);
238 }
239
240 pxa_dma->sg_cpu[sglen - 1].ddadr = DDADR_STOP;
241 pxa_dma->sg_cpu[sglen - 1].dcmd |= DCMD_ENDIRQEN;
242
243 return 0;
244 }
245
246 static int pxa_videobuf_prepare(struct videobuf_queue *vq,
247 struct videobuf_buffer *vb, enum v4l2_field field)
248 {
249 struct soc_camera_device *icd = vq->priv_data;
250 struct soc_camera_host *ici =
251 to_soc_camera_host(icd->dev.parent);
252 struct pxa_camera_dev *pcdev = ici->priv;
253 struct pxa_buffer *buf = container_of(vb, struct pxa_buffer, vb);
254 int ret;
255 int sglen_y, sglen_yu = 0, sglen_u = 0, sglen_v = 0;
256 int size_y, size_u = 0, size_v = 0;
257
258 dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__,
259 vb, vb->baddr, vb->bsize);
260
261 /* Added list head initialization on alloc */
262 WARN_ON(!list_empty(&vb->queue));
263
264 #ifdef DEBUG
265 /* This can be useful if you want to see if we actually fill
266 * the buffer with something */
267 memset((void *)vb->baddr, 0xaa, vb->bsize);
268 #endif
269
270 BUG_ON(NULL == icd->current_fmt);
271
272 /* I think, in buf_prepare you only have to protect global data,
273 * the actual buffer is yours */
274 buf->inwork = 1;
275
276 if (buf->fmt != icd->current_fmt ||
277 vb->width != icd->width ||
278 vb->height != icd->height ||
279 vb->field != field) {
280 buf->fmt = icd->current_fmt;
281 vb->width = icd->width;
282 vb->height = icd->height;
283 vb->field = field;
284 vb->state = VIDEOBUF_NEEDS_INIT;
285 }
286
287 vb->size = vb->width * vb->height * ((buf->fmt->depth + 7) >> 3);
288 if (0 != vb->baddr && vb->bsize < vb->size) {
289 ret = -EINVAL;
290 goto out;
291 }
292
293 if (vb->state == VIDEOBUF_NEEDS_INIT) {
294 unsigned int size = vb->size;
295 struct videobuf_dmabuf *dma = videobuf_to_dma(vb);
296
297 ret = videobuf_iolock(vq, vb, NULL);
298 if (ret)
299 goto fail;
300
301 if (pcdev->channels == 3) {
302 /* FIXME the calculations should be more precise */
303 sglen_y = dma->sglen / 2;
304 sglen_u = sglen_v = dma->sglen / 4 + 1;
305 sglen_yu = sglen_y + sglen_u;
306 size_y = size / 2;
307 size_u = size_v = size / 4;
308 } else {
309 sglen_y = dma->sglen;
310 size_y = size;
311 }
312
313 /* init DMA for Y channel */
314 ret = pxa_init_dma_channel(pcdev, buf, dma, 0, sglen_y,
315 0, 0x28, size_y);
316
317 if (ret) {
318 dev_err(pcdev->dev,
319 "DMA initialization for Y/RGB failed\n");
320 goto fail;
321 }
322
323 if (pcdev->channels == 3) {
324 /* init DMA for U channel */
325 ret = pxa_init_dma_channel(pcdev, buf, dma, 1, sglen_u,
326 sglen_y, 0x30, size_u);
327 if (ret) {
328 dev_err(pcdev->dev,
329 "DMA initialization for U failed\n");
330 goto fail_u;
331 }
332
333 /* init DMA for V channel */
334 ret = pxa_init_dma_channel(pcdev, buf, dma, 2, sglen_v,
335 sglen_yu, 0x38, size_v);
336 if (ret) {
337 dev_err(pcdev->dev,
338 "DMA initialization for V failed\n");
339 goto fail_v;
340 }
341 }
342
343 vb->state = VIDEOBUF_PREPARED;
344 }
345
346 buf->inwork = 0;
347 buf->active_dma = DMA_Y;
348 if (pcdev->channels == 3)
349 buf->active_dma |= DMA_U | DMA_V;
350
351 return 0;
352
353 fail_v:
354 dma_free_coherent(pcdev->dev, buf->dmas[1].sg_size,
355 buf->dmas[1].sg_cpu, buf->dmas[1].sg_dma);
356 fail_u:
357 dma_free_coherent(pcdev->dev, buf->dmas[0].sg_size,
358 buf->dmas[0].sg_cpu, buf->dmas[0].sg_dma);
359 fail:
360 free_buffer(vq, buf);
361 out:
362 buf->inwork = 0;
363 return ret;
364 }
365
366 static void pxa_videobuf_queue(struct videobuf_queue *vq,
367 struct videobuf_buffer *vb)
368 {
369 struct soc_camera_device *icd = vq->priv_data;
370 struct soc_camera_host *ici =
371 to_soc_camera_host(icd->dev.parent);
372 struct pxa_camera_dev *pcdev = ici->priv;
373 struct pxa_buffer *buf = container_of(vb, struct pxa_buffer, vb);
374 struct pxa_buffer *active;
375 unsigned long flags;
376 int i;
377
378 dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__,
379 vb, vb->baddr, vb->bsize);
380 spin_lock_irqsave(&pcdev->lock, flags);
381
382 list_add_tail(&vb->queue, &pcdev->capture);
383
384 vb->state = VIDEOBUF_ACTIVE;
385 active = pcdev->active;
386
387 if (!active) {
388 CIFR |= CIFR_RESET_F;
389
390 for (i = 0; i < pcdev->channels; i++) {
391 DDADR(pcdev->dma_chans[i]) = buf->dmas[i].sg_dma;
392 DCSR(pcdev->dma_chans[i]) = DCSR_RUN;
393 pcdev->sg_tail[i] = buf->dmas[i].sg_cpu + buf->dmas[i].sglen - 1;
394 }
395
396 pcdev->active = buf;
397 CICR0 |= CICR0_ENB;
398 } else {
399 struct pxa_cam_dma *buf_dma;
400 struct pxa_cam_dma *act_dma;
401 int nents;
402
403 for (i = 0; i < pcdev->channels; i++) {
404 buf_dma = &buf->dmas[i];
405 act_dma = &active->dmas[i];
406 nents = buf_dma->sglen;
407
408 /* Stop DMA engine */
409 DCSR(pcdev->dma_chans[i]) = 0;
410
411 /* Add the descriptors we just initialized to
412 the currently running chain */
413 pcdev->sg_tail[i]->ddadr = buf_dma->sg_dma;
414 pcdev->sg_tail[i] = buf_dma->sg_cpu + buf_dma->sglen - 1;
415
416 /* Setup a dummy descriptor with the DMA engines current
417 * state
418 */
419 buf_dma->sg_cpu[nents].dsadr =
420 pcdev->res->start + 0x28 + i*8; /* CIBRx */
421 buf_dma->sg_cpu[nents].dtadr =
422 DTADR(pcdev->dma_chans[i]);
423 buf_dma->sg_cpu[nents].dcmd =
424 DCMD(pcdev->dma_chans[i]);
425
426 if (DDADR(pcdev->dma_chans[i]) == DDADR_STOP) {
427 /* The DMA engine is on the last
428 descriptor, set the next descriptors
429 address to the descriptors we just
430 initialized */
431 buf_dma->sg_cpu[nents].ddadr = buf_dma->sg_dma;
432 } else {
433 buf_dma->sg_cpu[nents].ddadr =
434 DDADR(pcdev->dma_chans[i]);
435 }
436
437 /* The next descriptor is the dummy descriptor */
438 DDADR(pcdev->dma_chans[i]) = buf_dma->sg_dma + nents *
439 sizeof(struct pxa_dma_desc);
440
441 DCSR(pcdev->dma_chans[i]) = DCSR_RUN;
442 }
443 }
444
445 spin_unlock_irqrestore(&pcdev->lock, flags);
446 }
447
448 static void pxa_videobuf_release(struct videobuf_queue *vq,
449 struct videobuf_buffer *vb)
450 {
451 struct pxa_buffer *buf = container_of(vb, struct pxa_buffer, vb);
452 #ifdef DEBUG
453 struct soc_camera_device *icd = vq->priv_data;
454
455 dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__,
456 vb, vb->baddr, vb->bsize);
457
458 switch (vb->state) {
459 case VIDEOBUF_ACTIVE:
460 dev_dbg(&icd->dev, "%s (active)\n", __func__);
461 break;
462 case VIDEOBUF_QUEUED:
463 dev_dbg(&icd->dev, "%s (queued)\n", __func__);
464 break;
465 case VIDEOBUF_PREPARED:
466 dev_dbg(&icd->dev, "%s (prepared)\n", __func__);
467 break;
468 default:
469 dev_dbg(&icd->dev, "%s (unknown)\n", __func__);
470 break;
471 }
472 #endif
473
474 free_buffer(vq, buf);
475 }
476
477 static void pxa_camera_wakeup(struct pxa_camera_dev *pcdev,
478 struct videobuf_buffer *vb,
479 struct pxa_buffer *buf)
480 {
481 /* _init is used to debug races, see comment in pxa_camera_reqbufs() */
482 list_del_init(&vb->queue);
483 vb->state = VIDEOBUF_DONE;
484 do_gettimeofday(&vb->ts);
485 vb->field_count++;
486 wake_up(&vb->done);
487
488 if (list_empty(&pcdev->capture)) {
489 pcdev->active = NULL;
490 DCSR(pcdev->dma_chans[0]) = 0;
491 DCSR(pcdev->dma_chans[1]) = 0;
492 DCSR(pcdev->dma_chans[2]) = 0;
493 CICR0 &= ~CICR0_ENB;
494 return;
495 }
496
497 pcdev->active = list_entry(pcdev->capture.next,
498 struct pxa_buffer, vb.queue);
499 }
500
501 static void pxa_camera_dma_irq(int channel, struct pxa_camera_dev *pcdev,
502 enum pxa_camera_active_dma act_dma)
503 {
504 struct pxa_buffer *buf;
505 unsigned long flags;
506 u32 status, camera_status, overrun;
507 struct videobuf_buffer *vb;
508
509 spin_lock_irqsave(&pcdev->lock, flags);
510
511 status = DCSR(channel);
512 DCSR(channel) = status | DCSR_ENDINTR;
513
514 if (status & DCSR_BUSERR) {
515 dev_err(pcdev->dev, "DMA Bus Error IRQ!\n");
516 goto out;
517 }
518
519 if (!(status & DCSR_ENDINTR)) {
520 dev_err(pcdev->dev, "Unknown DMA IRQ source, "
521 "status: 0x%08x\n", status);
522 goto out;
523 }
524
525 if (!pcdev->active) {
526 dev_err(pcdev->dev, "DMA End IRQ with no active buffer!\n");
527 goto out;
528 }
529
530 camera_status = CISR;
531 overrun = CISR_IFO_0;
532 if (pcdev->channels == 3)
533 overrun |= CISR_IFO_1 | CISR_IFO_2;
534 if (camera_status & overrun) {
535 dev_dbg(pcdev->dev, "FIFO overrun! CISR: %x\n", camera_status);
536 /* Stop the Capture Interface */
537 CICR0 &= ~CICR0_ENB;
538 /* Stop DMA */
539 DCSR(channel) = 0;
540 /* Reset the FIFOs */
541 CIFR |= CIFR_RESET_F;
542 /* Enable End-Of-Frame Interrupt */
543 CICR0 &= ~CICR0_EOFM;
544 /* Restart the Capture Interface */
545 CICR0 |= CICR0_ENB;
546 goto out;
547 }
548
549 vb = &pcdev->active->vb;
550 buf = container_of(vb, struct pxa_buffer, vb);
551 WARN_ON(buf->inwork || list_empty(&vb->queue));
552 dev_dbg(pcdev->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__,
553 vb, vb->baddr, vb->bsize);
554
555 buf->active_dma &= ~act_dma;
556 if (!buf->active_dma)
557 pxa_camera_wakeup(pcdev, vb, buf);
558
559 out:
560 spin_unlock_irqrestore(&pcdev->lock, flags);
561 }
562
563 static void pxa_camera_dma_irq_y(int channel, void *data)
564 {
565 struct pxa_camera_dev *pcdev = data;
566 pxa_camera_dma_irq(channel, pcdev, DMA_Y);
567 }
568
569 static void pxa_camera_dma_irq_u(int channel, void *data)
570 {
571 struct pxa_camera_dev *pcdev = data;
572 pxa_camera_dma_irq(channel, pcdev, DMA_U);
573 }
574
575 static void pxa_camera_dma_irq_v(int channel, void *data)
576 {
577 struct pxa_camera_dev *pcdev = data;
578 pxa_camera_dma_irq(channel, pcdev, DMA_V);
579 }
580
581 static struct videobuf_queue_ops pxa_videobuf_ops = {
582 .buf_setup = pxa_videobuf_setup,
583 .buf_prepare = pxa_videobuf_prepare,
584 .buf_queue = pxa_videobuf_queue,
585 .buf_release = pxa_videobuf_release,
586 };
587
588 static void pxa_camera_init_videobuf(struct videobuf_queue *q,
589 struct soc_camera_device *icd)
590 {
591 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
592 struct pxa_camera_dev *pcdev = ici->priv;
593
594 /* We must pass NULL as dev pointer, then all pci_* dma operations
595 * transform to normal dma_* ones. */
596 videobuf_queue_sg_init(q, &pxa_videobuf_ops, NULL, &pcdev->lock,
597 V4L2_BUF_TYPE_VIDEO_CAPTURE, V4L2_FIELD_NONE,
598 sizeof(struct pxa_buffer), icd);
599 }
600
601 static int mclk_get_divisor(struct pxa_camera_dev *pcdev)
602 {
603 unsigned int mclk_10khz = pcdev->platform_mclk_10khz;
604 unsigned long div;
605 unsigned long lcdclk;
606
607 lcdclk = clk_get_rate(pcdev->clk) / 10000;
608
609 /* We verify platform_mclk_10khz != 0, so if anyone breaks it, here
610 * they get a nice Oops */
611 div = (lcdclk + 2 * mclk_10khz - 1) / (2 * mclk_10khz) - 1;
612
613 dev_dbg(pcdev->dev, "LCD clock %lukHz, target freq %dkHz, "
614 "divisor %lu\n", lcdclk * 10, mclk_10khz * 10, div);
615
616 return div;
617 }
618
619 static void pxa_camera_activate(struct pxa_camera_dev *pcdev)
620 {
621 struct pxacamera_platform_data *pdata = pcdev->pdata;
622 u32 cicr4 = 0;
623
624 dev_dbg(pcdev->dev, "Registered platform device at %p data %p\n",
625 pcdev, pdata);
626
627 if (pdata && pdata->init) {
628 dev_dbg(pcdev->dev, "%s: Init gpios\n", __func__);
629 pdata->init(pcdev->dev);
630 }
631
632 CICR0 = 0x3FF; /* disable all interrupts */
633
634 if (pcdev->platform_flags & PXA_CAMERA_PCLK_EN)
635 cicr4 |= CICR4_PCLK_EN;
636 if (pcdev->platform_flags & PXA_CAMERA_MCLK_EN)
637 cicr4 |= CICR4_MCLK_EN;
638 if (pcdev->platform_flags & PXA_CAMERA_PCP)
639 cicr4 |= CICR4_PCP;
640 if (pcdev->platform_flags & PXA_CAMERA_HSP)
641 cicr4 |= CICR4_HSP;
642 if (pcdev->platform_flags & PXA_CAMERA_VSP)
643 cicr4 |= CICR4_VSP;
644
645 CICR4 = mclk_get_divisor(pcdev) | cicr4;
646
647 clk_enable(pcdev->clk);
648 }
649
650 static void pxa_camera_deactivate(struct pxa_camera_dev *pcdev)
651 {
652 clk_disable(pcdev->clk);
653 }
654
655 static irqreturn_t pxa_camera_irq(int irq, void *data)
656 {
657 struct pxa_camera_dev *pcdev = data;
658 unsigned int status = CISR;
659
660 dev_dbg(pcdev->dev, "Camera interrupt status 0x%x\n", status);
661
662 if (!status)
663 return IRQ_NONE;
664
665 CISR = status;
666
667 if (status & CISR_EOF) {
668 int i;
669 for (i = 0; i < pcdev->channels; i++) {
670 DDADR(pcdev->dma_chans[i]) =
671 pcdev->active->dmas[i].sg_dma;
672 DCSR(pcdev->dma_chans[i]) = DCSR_RUN;
673 }
674 CICR0 |= CICR0_EOFM;
675 }
676
677 return IRQ_HANDLED;
678 }
679
680 /* The following two functions absolutely depend on the fact, that
681 * there can be only one camera on PXA quick capture interface */
682 static int pxa_camera_add_device(struct soc_camera_device *icd)
683 {
684 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
685 struct pxa_camera_dev *pcdev = ici->priv;
686 int ret;
687
688 mutex_lock(&camera_lock);
689
690 if (pcdev->icd) {
691 ret = -EBUSY;
692 goto ebusy;
693 }
694
695 dev_info(&icd->dev, "PXA Camera driver attached to camera %d\n",
696 icd->devnum);
697
698 pxa_camera_activate(pcdev);
699 ret = icd->ops->init(icd);
700
701 if (!ret)
702 pcdev->icd = icd;
703
704 ebusy:
705 mutex_unlock(&camera_lock);
706
707 return ret;
708 }
709
710 static void pxa_camera_remove_device(struct soc_camera_device *icd)
711 {
712 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
713 struct pxa_camera_dev *pcdev = ici->priv;
714
715 BUG_ON(icd != pcdev->icd);
716
717 dev_info(&icd->dev, "PXA Camera driver detached from camera %d\n",
718 icd->devnum);
719
720 /* disable capture, disable interrupts */
721 CICR0 = 0x3ff;
722
723 /* Stop DMA engine */
724 DCSR(pcdev->dma_chans[0]) = 0;
725 DCSR(pcdev->dma_chans[1]) = 0;
726 DCSR(pcdev->dma_chans[2]) = 0;
727
728 icd->ops->release(icd);
729
730 pxa_camera_deactivate(pcdev);
731
732 pcdev->icd = NULL;
733 }
734
735 static int test_platform_param(struct pxa_camera_dev *pcdev,
736 unsigned char buswidth, unsigned long *flags)
737 {
738 /*
739 * Platform specified synchronization and pixel clock polarities are
740 * only a recommendation and are only used during probing. The PXA270
741 * quick capture interface supports both.
742 */
743 *flags = (pcdev->platform_flags & PXA_CAMERA_MASTER ?
744 SOCAM_MASTER : SOCAM_SLAVE) |
745 SOCAM_HSYNC_ACTIVE_HIGH |
746 SOCAM_HSYNC_ACTIVE_LOW |
747 SOCAM_VSYNC_ACTIVE_HIGH |
748 SOCAM_VSYNC_ACTIVE_LOW |
749 SOCAM_PCLK_SAMPLE_RISING |
750 SOCAM_PCLK_SAMPLE_FALLING;
751
752 /* If requested data width is supported by the platform, use it */
753 switch (buswidth) {
754 case 10:
755 if (!(pcdev->platform_flags & PXA_CAMERA_DATAWIDTH_10))
756 return -EINVAL;
757 *flags |= SOCAM_DATAWIDTH_10;
758 break;
759 case 9:
760 if (!(pcdev->platform_flags & PXA_CAMERA_DATAWIDTH_9))
761 return -EINVAL;
762 *flags |= SOCAM_DATAWIDTH_9;
763 break;
764 case 8:
765 if (!(pcdev->platform_flags & PXA_CAMERA_DATAWIDTH_8))
766 return -EINVAL;
767 *flags |= SOCAM_DATAWIDTH_8;
768 }
769
770 return 0;
771 }
772
773 static int pxa_camera_set_bus_param(struct soc_camera_device *icd, __u32 pixfmt)
774 {
775 struct soc_camera_host *ici =
776 to_soc_camera_host(icd->dev.parent);
777 struct pxa_camera_dev *pcdev = ici->priv;
778 unsigned long dw, bpp, bus_flags, camera_flags, common_flags;
779 u32 cicr0, cicr1, cicr4 = 0;
780 int ret = test_platform_param(pcdev, icd->buswidth, &bus_flags);
781
782 if (ret < 0)
783 return ret;
784
785 camera_flags = icd->ops->query_bus_param(icd);
786
787 common_flags = soc_camera_bus_param_compatible(camera_flags, bus_flags);
788 if (!common_flags)
789 return -EINVAL;
790
791 pcdev->channels = 1;
792
793 /* Make choises, based on platform preferences */
794 if ((common_flags & SOCAM_HSYNC_ACTIVE_HIGH) &&
795 (common_flags & SOCAM_HSYNC_ACTIVE_LOW)) {
796 if (pcdev->platform_flags & PXA_CAMERA_HSP)
797 common_flags &= ~SOCAM_HSYNC_ACTIVE_HIGH;
798 else
799 common_flags &= ~SOCAM_HSYNC_ACTIVE_LOW;
800 }
801
802 if ((common_flags & SOCAM_VSYNC_ACTIVE_HIGH) &&
803 (common_flags & SOCAM_VSYNC_ACTIVE_LOW)) {
804 if (pcdev->platform_flags & PXA_CAMERA_VSP)
805 common_flags &= ~SOCAM_VSYNC_ACTIVE_HIGH;
806 else
807 common_flags &= ~SOCAM_VSYNC_ACTIVE_LOW;
808 }
809
810 if ((common_flags & SOCAM_PCLK_SAMPLE_RISING) &&
811 (common_flags & SOCAM_PCLK_SAMPLE_FALLING)) {
812 if (pcdev->platform_flags & PXA_CAMERA_PCP)
813 common_flags &= ~SOCAM_PCLK_SAMPLE_RISING;
814 else
815 common_flags &= ~SOCAM_PCLK_SAMPLE_FALLING;
816 }
817
818 ret = icd->ops->set_bus_param(icd, common_flags);
819 if (ret < 0)
820 return ret;
821
822 /* Datawidth is now guaranteed to be equal to one of the three values.
823 * We fix bit-per-pixel equal to data-width... */
824 switch (common_flags & SOCAM_DATAWIDTH_MASK) {
825 case SOCAM_DATAWIDTH_10:
826 icd->buswidth = 10;
827 dw = 4;
828 bpp = 0x40;
829 break;
830 case SOCAM_DATAWIDTH_9:
831 icd->buswidth = 9;
832 dw = 3;
833 bpp = 0x20;
834 break;
835 default:
836 /* Actually it can only be 8 now,
837 * default is just to silence compiler warnings */
838 case SOCAM_DATAWIDTH_8:
839 icd->buswidth = 8;
840 dw = 2;
841 bpp = 0;
842 }
843
844 if (pcdev->platform_flags & PXA_CAMERA_PCLK_EN)
845 cicr4 |= CICR4_PCLK_EN;
846 if (pcdev->platform_flags & PXA_CAMERA_MCLK_EN)
847 cicr4 |= CICR4_MCLK_EN;
848 if (common_flags & SOCAM_PCLK_SAMPLE_FALLING)
849 cicr4 |= CICR4_PCP;
850 if (common_flags & SOCAM_HSYNC_ACTIVE_LOW)
851 cicr4 |= CICR4_HSP;
852 if (common_flags & SOCAM_VSYNC_ACTIVE_LOW)
853 cicr4 |= CICR4_VSP;
854
855 cicr0 = CICR0;
856 if (cicr0 & CICR0_ENB)
857 CICR0 = cicr0 & ~CICR0_ENB;
858
859 cicr1 = CICR1_PPL_VAL(icd->width - 1) | bpp | dw;
860
861 switch (pixfmt) {
862 case V4L2_PIX_FMT_YUV422P:
863 pcdev->channels = 3;
864 cicr1 |= CICR1_YCBCR_F;
865 case V4L2_PIX_FMT_YUYV:
866 cicr1 |= CICR1_COLOR_SP_VAL(2);
867 break;
868 case V4L2_PIX_FMT_RGB555:
869 cicr1 |= CICR1_RGB_BPP_VAL(1) | CICR1_RGBT_CONV_VAL(2) |
870 CICR1_TBIT | CICR1_COLOR_SP_VAL(1);
871 break;
872 case V4L2_PIX_FMT_RGB565:
873 cicr1 |= CICR1_COLOR_SP_VAL(1) | CICR1_RGB_BPP_VAL(2);
874 break;
875 }
876
877 CICR1 = cicr1;
878 CICR2 = 0;
879 CICR3 = CICR3_LPF_VAL(icd->height - 1) |
880 CICR3_BFW_VAL(min((unsigned short)255, icd->y_skip_top));
881 CICR4 = mclk_get_divisor(pcdev) | cicr4;
882
883 /* CIF interrupts are not used, only DMA */
884 CICR0 = (pcdev->platform_flags & PXA_CAMERA_MASTER ?
885 CICR0_SIM_MP : (CICR0_SL_CAP_EN | CICR0_SIM_SP)) |
886 CICR0_DMAEN | CICR0_IRQ_MASK | (cicr0 & CICR0_ENB);
887
888 return 0;
889 }
890
891 static int pxa_camera_try_bus_param(struct soc_camera_device *icd, __u32 pixfmt)
892 {
893 struct soc_camera_host *ici =
894 to_soc_camera_host(icd->dev.parent);
895 struct pxa_camera_dev *pcdev = ici->priv;
896 unsigned long bus_flags, camera_flags;
897 int ret = test_platform_param(pcdev, icd->buswidth, &bus_flags);
898
899 if (ret < 0)
900 return ret;
901
902 camera_flags = icd->ops->query_bus_param(icd);
903
904 return soc_camera_bus_param_compatible(camera_flags, bus_flags) ? 0 : -EINVAL;
905 }
906
907 static int pxa_camera_set_fmt_cap(struct soc_camera_device *icd,
908 __u32 pixfmt, struct v4l2_rect *rect)
909 {
910 return icd->ops->set_fmt_cap(icd, pixfmt, rect);
911 }
912
913 static int pxa_camera_try_fmt_cap(struct soc_camera_device *icd,
914 struct v4l2_format *f)
915 {
916 /* limit to pxa hardware capabilities */
917 if (f->fmt.pix.height < 32)
918 f->fmt.pix.height = 32;
919 if (f->fmt.pix.height > 2048)
920 f->fmt.pix.height = 2048;
921 if (f->fmt.pix.width < 48)
922 f->fmt.pix.width = 48;
923 if (f->fmt.pix.width > 2048)
924 f->fmt.pix.width = 2048;
925 f->fmt.pix.width &= ~0x01;
926
927 /* limit to sensor capabilities */
928 return icd->ops->try_fmt_cap(icd, f);
929 }
930
931 static int pxa_camera_reqbufs(struct soc_camera_file *icf,
932 struct v4l2_requestbuffers *p)
933 {
934 int i;
935
936 /* This is for locking debugging only. I removed spinlocks and now I
937 * check whether .prepare is ever called on a linked buffer, or whether
938 * a dma IRQ can occur for an in-work or unlinked buffer. Until now
939 * it hadn't triggered */
940 for (i = 0; i < p->count; i++) {
941 struct pxa_buffer *buf = container_of(icf->vb_vidq.bufs[i],
942 struct pxa_buffer, vb);
943 buf->inwork = 0;
944 INIT_LIST_HEAD(&buf->vb.queue);
945 }
946
947 return 0;
948 }
949
950 static unsigned int pxa_camera_poll(struct file *file, poll_table *pt)
951 {
952 struct soc_camera_file *icf = file->private_data;
953 struct pxa_buffer *buf;
954
955 buf = list_entry(icf->vb_vidq.stream.next, struct pxa_buffer,
956 vb.stream);
957
958 poll_wait(file, &buf->vb.done, pt);
959
960 if (buf->vb.state == VIDEOBUF_DONE ||
961 buf->vb.state == VIDEOBUF_ERROR)
962 return POLLIN|POLLRDNORM;
963
964 return 0;
965 }
966
967 static int pxa_camera_querycap(struct soc_camera_host *ici,
968 struct v4l2_capability *cap)
969 {
970 /* cap->name is set by the firendly caller:-> */
971 strlcpy(cap->card, pxa_cam_driver_description, sizeof(cap->card));
972 cap->version = PXA_CAM_VERSION_CODE;
973 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
974
975 return 0;
976 }
977
978 static int pxa_camera_suspend(struct soc_camera_device *icd, pm_message_t state)
979 {
980 struct soc_camera_host *ici =
981 to_soc_camera_host(icd->dev.parent);
982 struct pxa_camera_dev *pcdev = ici->priv;
983 int i = 0, ret = 0;
984
985 pcdev->save_cicr[i++] = CICR0;
986 pcdev->save_cicr[i++] = CICR1;
987 pcdev->save_cicr[i++] = CICR2;
988 pcdev->save_cicr[i++] = CICR3;
989 pcdev->save_cicr[i++] = CICR4;
990
991 if ((pcdev->icd) && (pcdev->icd->ops->suspend))
992 ret = pcdev->icd->ops->suspend(pcdev->icd, state);
993
994 return ret;
995 }
996
997 static int pxa_camera_resume(struct soc_camera_device *icd)
998 {
999 struct soc_camera_host *ici =
1000 to_soc_camera_host(icd->dev.parent);
1001 struct pxa_camera_dev *pcdev = ici->priv;
1002 int i = 0, ret = 0;
1003
1004 DRCMR(68) = pcdev->dma_chans[0] | DRCMR_MAPVLD;
1005 DRCMR(69) = pcdev->dma_chans[1] | DRCMR_MAPVLD;
1006 DRCMR(70) = pcdev->dma_chans[2] | DRCMR_MAPVLD;
1007
1008 CICR0 = pcdev->save_cicr[i++] & ~CICR0_ENB;
1009 CICR1 = pcdev->save_cicr[i++];
1010 CICR2 = pcdev->save_cicr[i++];
1011 CICR3 = pcdev->save_cicr[i++];
1012 CICR4 = pcdev->save_cicr[i++];
1013
1014 if ((pcdev->icd) && (pcdev->icd->ops->resume))
1015 ret = pcdev->icd->ops->resume(pcdev->icd);
1016
1017 /* Restart frame capture if active buffer exists */
1018 if (!ret && pcdev->active) {
1019 /* Reset the FIFOs */
1020 CIFR |= CIFR_RESET_F;
1021 /* Enable End-Of-Frame Interrupt */
1022 CICR0 &= ~CICR0_EOFM;
1023 /* Restart the Capture Interface */
1024 CICR0 |= CICR0_ENB;
1025 }
1026
1027 return ret;
1028 }
1029
1030 static struct soc_camera_host_ops pxa_soc_camera_host_ops = {
1031 .owner = THIS_MODULE,
1032 .add = pxa_camera_add_device,
1033 .remove = pxa_camera_remove_device,
1034 .suspend = pxa_camera_suspend,
1035 .resume = pxa_camera_resume,
1036 .set_fmt_cap = pxa_camera_set_fmt_cap,
1037 .try_fmt_cap = pxa_camera_try_fmt_cap,
1038 .init_videobuf = pxa_camera_init_videobuf,
1039 .reqbufs = pxa_camera_reqbufs,
1040 .poll = pxa_camera_poll,
1041 .querycap = pxa_camera_querycap,
1042 .try_bus_param = pxa_camera_try_bus_param,
1043 .set_bus_param = pxa_camera_set_bus_param,
1044 };
1045
1046 /* Should be allocated dynamically too, but we have only one. */
1047 static struct soc_camera_host pxa_soc_camera_host = {
1048 .drv_name = PXA_CAM_DRV_NAME,
1049 .ops = &pxa_soc_camera_host_ops,
1050 };
1051
1052 static int pxa_camera_probe(struct platform_device *pdev)
1053 {
1054 struct pxa_camera_dev *pcdev;
1055 struct resource *res;
1056 void __iomem *base;
1057 int irq;
1058 int err = 0;
1059
1060 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1061 irq = platform_get_irq(pdev, 0);
1062 if (!res || irq < 0) {
1063 err = -ENODEV;
1064 goto exit;
1065 }
1066
1067 pcdev = kzalloc(sizeof(*pcdev), GFP_KERNEL);
1068 if (!pcdev) {
1069 dev_err(&pdev->dev, "Could not allocate pcdev\n");
1070 err = -ENOMEM;
1071 goto exit;
1072 }
1073
1074 pcdev->clk = clk_get(&pdev->dev, "CAMCLK");
1075 if (IS_ERR(pcdev->clk)) {
1076 err = PTR_ERR(pcdev->clk);
1077 goto exit_kfree;
1078 }
1079
1080 dev_set_drvdata(&pdev->dev, pcdev);
1081 pcdev->res = res;
1082
1083 pcdev->pdata = pdev->dev.platform_data;
1084 pcdev->platform_flags = pcdev->pdata->flags;
1085 if (!(pcdev->platform_flags & (PXA_CAMERA_DATAWIDTH_8 |
1086 PXA_CAMERA_DATAWIDTH_9 | PXA_CAMERA_DATAWIDTH_10))) {
1087 /* Platform hasn't set available data widths. This is bad.
1088 * Warn and use a default. */
1089 dev_warn(&pdev->dev, "WARNING! Platform hasn't set available "
1090 "data widths, using default 10 bit\n");
1091 pcdev->platform_flags |= PXA_CAMERA_DATAWIDTH_10;
1092 }
1093 pcdev->platform_mclk_10khz = pcdev->pdata->mclk_10khz;
1094 if (!pcdev->platform_mclk_10khz) {
1095 dev_warn(&pdev->dev,
1096 "mclk_10khz == 0! Please, fix your platform data. "
1097 "Using default 20MHz\n");
1098 pcdev->platform_mclk_10khz = 2000;
1099 }
1100
1101 INIT_LIST_HEAD(&pcdev->capture);
1102 spin_lock_init(&pcdev->lock);
1103
1104 /*
1105 * Request the regions.
1106 */
1107 if (!request_mem_region(res->start, res->end - res->start + 1,
1108 PXA_CAM_DRV_NAME)) {
1109 err = -EBUSY;
1110 goto exit_clk;
1111 }
1112
1113 base = ioremap(res->start, res->end - res->start + 1);
1114 if (!base) {
1115 err = -ENOMEM;
1116 goto exit_release;
1117 }
1118 pcdev->irq = irq;
1119 pcdev->base = base;
1120 pcdev->dev = &pdev->dev;
1121
1122 /* request dma */
1123 err = pxa_request_dma("CI_Y", DMA_PRIO_HIGH,
1124 pxa_camera_dma_irq_y, pcdev);
1125 if (err < 0) {
1126 dev_err(pcdev->dev, "Can't request DMA for Y\n");
1127 goto exit_iounmap;
1128 }
1129 pcdev->dma_chans[0] = err;
1130 dev_dbg(pcdev->dev, "got DMA channel %d\n", pcdev->dma_chans[0]);
1131
1132 err = pxa_request_dma("CI_U", DMA_PRIO_HIGH,
1133 pxa_camera_dma_irq_u, pcdev);
1134 if (err < 0) {
1135 dev_err(pcdev->dev, "Can't request DMA for U\n");
1136 goto exit_free_dma_y;
1137 }
1138 pcdev->dma_chans[1] = err;
1139 dev_dbg(pcdev->dev, "got DMA channel (U) %d\n", pcdev->dma_chans[1]);
1140
1141 err = pxa_request_dma("CI_V", DMA_PRIO_HIGH,
1142 pxa_camera_dma_irq_v, pcdev);
1143 if (err < 0) {
1144 dev_err(pcdev->dev, "Can't request DMA for V\n");
1145 goto exit_free_dma_u;
1146 }
1147 pcdev->dma_chans[2] = err;
1148 dev_dbg(pcdev->dev, "got DMA channel (V) %d\n", pcdev->dma_chans[2]);
1149
1150 DRCMR(68) = pcdev->dma_chans[0] | DRCMR_MAPVLD;
1151 DRCMR(69) = pcdev->dma_chans[1] | DRCMR_MAPVLD;
1152 DRCMR(70) = pcdev->dma_chans[2] | DRCMR_MAPVLD;
1153
1154 /* request irq */
1155 err = request_irq(pcdev->irq, pxa_camera_irq, 0, PXA_CAM_DRV_NAME,
1156 pcdev);
1157 if (err) {
1158 dev_err(pcdev->dev, "Camera interrupt register failed \n");
1159 goto exit_free_dma;
1160 }
1161
1162 pxa_soc_camera_host.priv = pcdev;
1163 pxa_soc_camera_host.dev.parent = &pdev->dev;
1164 pxa_soc_camera_host.nr = pdev->id;
1165 err = soc_camera_host_register(&pxa_soc_camera_host);
1166 if (err)
1167 goto exit_free_irq;
1168
1169 return 0;
1170
1171 exit_free_irq:
1172 free_irq(pcdev->irq, pcdev);
1173 exit_free_dma:
1174 pxa_free_dma(pcdev->dma_chans[2]);
1175 exit_free_dma_u:
1176 pxa_free_dma(pcdev->dma_chans[1]);
1177 exit_free_dma_y:
1178 pxa_free_dma(pcdev->dma_chans[0]);
1179 exit_iounmap:
1180 iounmap(base);
1181 exit_release:
1182 release_mem_region(res->start, res->end - res->start + 1);
1183 exit_clk:
1184 clk_put(pcdev->clk);
1185 exit_kfree:
1186 kfree(pcdev);
1187 exit:
1188 return err;
1189 }
1190
1191 static int __devexit pxa_camera_remove(struct platform_device *pdev)
1192 {
1193 struct pxa_camera_dev *pcdev = platform_get_drvdata(pdev);
1194 struct resource *res;
1195
1196 clk_put(pcdev->clk);
1197
1198 pxa_free_dma(pcdev->dma_chans[0]);
1199 pxa_free_dma(pcdev->dma_chans[1]);
1200 pxa_free_dma(pcdev->dma_chans[2]);
1201 free_irq(pcdev->irq, pcdev);
1202
1203 soc_camera_host_unregister(&pxa_soc_camera_host);
1204
1205 iounmap(pcdev->base);
1206
1207 res = pcdev->res;
1208 release_mem_region(res->start, res->end - res->start + 1);
1209
1210 kfree(pcdev);
1211
1212 dev_info(&pdev->dev, "PXA Camera driver unloaded\n");
1213
1214 return 0;
1215 }
1216
1217 static struct platform_driver pxa_camera_driver = {
1218 .driver = {
1219 .name = PXA_CAM_DRV_NAME,
1220 },
1221 .probe = pxa_camera_probe,
1222 .remove = __exit_p(pxa_camera_remove),
1223 };
1224
1225
1226 static int __devinit pxa_camera_init(void)
1227 {
1228 return platform_driver_register(&pxa_camera_driver);
1229 }
1230
1231 static void __exit pxa_camera_exit(void)
1232 {
1233 platform_driver_unregister(&pxa_camera_driver);
1234 }
1235
1236 module_init(pxa_camera_init);
1237 module_exit(pxa_camera_exit);
1238
1239 MODULE_DESCRIPTION("PXA27x SoC Camera Host driver");
1240 MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>");
1241 MODULE_LICENSE("GPL");
ubuntu-bionic-kernel mirror