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authorGuennadi Liakhovetski <g.liakhovetski@pengutronix.de>2008-04-06 20:24:56 -0400
committerMauro Carvalho Chehab <mchehab@infradead.org>2008-04-24 13:07:42 -0400
commit3bc43840c3fbffaf8216883a37b336a41050d7f7 (patch)
tree55012f05a4e073c81b7e352cc1ddaf33137e5270 /drivers
parente55222ef27a2390d8abce27a3ce2d4c719ad5f1b (diff)
V4L/DVB (7578a): V4L: V4L2 soc_camera driver for PXA270
This patch adds a driver for the Quick Capture Interface on the PXA270. It is based on the original driver from Intel, but has been re-worked multiple times since then, now it also supports the V4L2 API. This patch depends on a complementary patch, submitted to the ARM tree, providing PXA270 camera platform bindings. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@pengutronix.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/media/video/Kconfig7
-rw-r--r--drivers/media/video/Makefile1
-rw-r--r--drivers/media/video/pxa_camera.c937
3 files changed, 945 insertions, 0 deletions
diff --git a/drivers/media/video/Kconfig b/drivers/media/video/Kconfig
index 5d3fbd969b6b..fb4bf089c68f 100644
--- a/drivers/media/video/Kconfig
+++ b/drivers/media/video/Kconfig
@@ -845,4 +845,11 @@ config SOC_CAMERA
845 over a bus like PCI or USB. For example some i2c camera connected 845 over a bus like PCI or USB. For example some i2c camera connected
846 directly to the data bus of an SoC. 846 directly to the data bus of an SoC.
847 847
848config VIDEO_PXA27x
849 tristate "PXA27x Quick Capture Interface driver"
850 depends on VIDEO_DEV && PXA27x
851 select SOC_CAMERA
852 ---help---
853 This is a v4l2 driver for the PXA27x Quick Capture Interface
854
848endif # VIDEO_CAPTURE_DRIVERS 855endif # VIDEO_CAPTURE_DRIVERS
diff --git a/drivers/media/video/Makefile b/drivers/media/video/Makefile
index cf5e990a47bf..874ed967f416 100644
--- a/drivers/media/video/Makefile
+++ b/drivers/media/video/Makefile
@@ -136,6 +136,7 @@ obj-$(CONFIG_VIDEO_IVTV) += ivtv/
136obj-$(CONFIG_VIDEO_VIVI) += vivi.o 136obj-$(CONFIG_VIDEO_VIVI) += vivi.o
137obj-$(CONFIG_VIDEO_CX23885) += cx23885/ 137obj-$(CONFIG_VIDEO_CX23885) += cx23885/
138 138
139obj-$(CONFIG_VIDEO_PXA27x) += pxa_camera.o
139obj-$(CONFIG_SOC_CAMERA) += soc_camera.o 140obj-$(CONFIG_SOC_CAMERA) += soc_camera.o
140 141
141EXTRA_CFLAGS += -Idrivers/media/dvb/dvb-core 142EXTRA_CFLAGS += -Idrivers/media/dvb/dvb-core
diff --git a/drivers/media/video/pxa_camera.c b/drivers/media/video/pxa_camera.c
new file mode 100644
index 000000000000..11aecad769cc
--- /dev/null
+++ b/drivers/media/video/pxa_camera.c
@@ -0,0 +1,937 @@
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 <asm/io.h>
14
15#include <linux/init.h>
16#include <linux/module.h>
17#include <linux/delay.h>
18#include <linux/dma-mapping.h>
19#include <linux/errno.h>
20#include <linux/fs.h>
21#include <linux/interrupt.h>
22#include <linux/kernel.h>
23#include <linux/mm.h>
24#include <linux/moduleparam.h>
25#include <linux/time.h>
26#include <linux/version.h>
27#include <linux/device.h>
28#include <linux/platform_device.h>
29#include <linux/mutex.h>
30#include <linux/clk.h>
31
32#include <media/v4l2-common.h>
33#include <media/v4l2-dev.h>
34#include <media/soc_camera.h>
35
36#include <linux/videodev2.h>
37
38#include <asm/dma.h>
39#include <asm/arch/pxa-regs.h>
40#include <asm/arch/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_IRQ_MASK (CICR0_TOM | CICR0_RDAVM | CICR0_FEM | CICR0_EOLM | \
46 CICR0_PERRM | CICR0_QDM | CICR0_CDM | CICR0_SOFM | \
47 CICR0_EOFM | CICR0_FOM)
48
49static DEFINE_MUTEX(camera_lock);
50
51/*
52 * Structures
53 */
54
55/* buffer for one video frame */
56struct pxa_buffer {
57 /* common v4l buffer stuff -- must be first */
58 struct videobuf_buffer vb;
59
60 const struct soc_camera_data_format *fmt;
61
62 /* our descriptor list needed for the PXA DMA engine */
63 dma_addr_t sg_dma;
64 struct pxa_dma_desc *sg_cpu;
65 size_t sg_size;
66 int inwork;
67};
68
69struct pxa_framebuffer_queue {
70 dma_addr_t sg_last_dma;
71 struct pxa_dma_desc *sg_last_cpu;
72};
73
74struct pxa_camera_dev {
75 struct device *dev;
76 /* PXA27x is only supposed to handle one camera on its Quick Capture
77 * interface. If anyone ever builds hardware to enable more than
78 * one camera, they will have to modify this driver too */
79 struct soc_camera_device *icd;
80 struct clk *clk;
81
82 unsigned int irq;
83 void __iomem *base;
84 unsigned int dma_chan_y;
85
86 enum v4l2_buf_type type;
87
88 struct pxacamera_platform_data *pdata;
89 struct resource *res;
90 unsigned long platform_flags;
91 unsigned long platform_mclk_10khz;
92
93 struct list_head capture;
94
95 spinlock_t lock;
96
97 int dma_running;
98
99 struct pxa_buffer *active;
100};
101
102static const char *pxa_cam_driver_description = "PXA_Camera";
103
104static unsigned int vid_limit = 16; /* Video memory limit, in Mb */
105
106/*
107 * Videobuf operations
108 */
109static int
110pxa_videobuf_setup(struct videobuf_queue *vq, unsigned int *count,
111 unsigned int *size)
112{
113 struct soc_camera_device *icd = vq->priv_data;
114
115 dev_dbg(&icd->dev, "count=%d, size=%d\n", *count, *size);
116
117 *size = icd->width * icd->height * ((icd->current_fmt->depth + 7) >> 3);
118
119 if (0 == *count)
120 *count = 32;
121 while (*size * *count > vid_limit * 1024 * 1024)
122 (*count)--;
123
124 return 0;
125}
126
127static void free_buffer(struct videobuf_queue *vq, struct pxa_buffer *buf)
128{
129 struct soc_camera_device *icd = vq->priv_data;
130 struct soc_camera_host *ici =
131 to_soc_camera_host(icd->dev.parent);
132 struct pxa_camera_dev *pcdev = ici->priv;
133 struct videobuf_dmabuf *dma = videobuf_to_dma(&buf->vb);
134
135 BUG_ON(in_interrupt());
136
137 dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d\n", __FUNCTION__,
138 &buf->vb, buf->vb.baddr, buf->vb.bsize);
139
140 /* This waits until this buffer is out of danger, i.e., until it is no
141 * longer in STATE_QUEUED or STATE_ACTIVE */
142 videobuf_waiton(&buf->vb, 0, 0);
143 videobuf_dma_unmap(vq, dma);
144 videobuf_dma_free(dma);
145
146 if (buf->sg_cpu)
147 dma_free_coherent(pcdev->dev, buf->sg_size, buf->sg_cpu,
148 buf->sg_dma);
149 buf->sg_cpu = NULL;
150
151 buf->vb.state = VIDEOBUF_NEEDS_INIT;
152}
153
154static int
155pxa_videobuf_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
156 enum v4l2_field field)
157{
158 struct soc_camera_device *icd = vq->priv_data;
159 struct soc_camera_host *ici =
160 to_soc_camera_host(icd->dev.parent);
161 struct pxa_camera_dev *pcdev = ici->priv;
162 struct pxa_buffer *buf = container_of(vb, struct pxa_buffer, vb);
163 int i, ret;
164
165 dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d\n", __FUNCTION__,
166 vb, vb->baddr, vb->bsize);
167
168 /* Added list head initialization on alloc */
169 WARN_ON(!list_empty(&vb->queue));
170
171#ifdef DEBUG
172 /* This can be useful if you want to see if we actually fill
173 * the buffer with something */
174 memset((void *)vb->baddr, 0xaa, vb->bsize);
175#endif
176
177 BUG_ON(NULL == icd->current_fmt);
178
179 /* I think, in buf_prepare you only have to protect global data,
180 * the actual buffer is yours */
181 buf->inwork = 1;
182
183 if (buf->fmt != icd->current_fmt ||
184 vb->width != icd->width ||
185 vb->height != icd->height ||
186 vb->field != field) {
187 buf->fmt = icd->current_fmt;
188 vb->width = icd->width;
189 vb->height = icd->height;
190 vb->field = field;
191 vb->state = VIDEOBUF_NEEDS_INIT;
192 }
193
194 vb->size = vb->width * vb->height * ((buf->fmt->depth + 7) >> 3);
195 if (0 != vb->baddr && vb->bsize < vb->size) {
196 ret = -EINVAL;
197 goto out;
198 }
199
200 if (vb->state == VIDEOBUF_NEEDS_INIT) {
201 unsigned int size = vb->size;
202 struct videobuf_dmabuf *dma = videobuf_to_dma(vb);
203
204 ret = videobuf_iolock(vq, vb, NULL);
205 if (ret)
206 goto fail;
207
208 if (buf->sg_cpu)
209 dma_free_coherent(pcdev->dev, buf->sg_size, buf->sg_cpu,
210 buf->sg_dma);
211
212 buf->sg_size = (dma->sglen + 1) * sizeof(struct pxa_dma_desc);
213 buf->sg_cpu = dma_alloc_coherent(pcdev->dev, buf->sg_size,
214 &buf->sg_dma, GFP_KERNEL);
215 if (!buf->sg_cpu) {
216 ret = -ENOMEM;
217 goto fail;
218 }
219
220 dev_dbg(&icd->dev, "nents=%d size: %d sg=0x%p\n",
221 dma->sglen, size, dma->sglist);
222 for (i = 0; i < dma->sglen; i++) {
223 struct scatterlist *sg = dma->sglist;
224 unsigned int dma_len = sg_dma_len(&sg[i]), xfer_len;
225
226 /* CIBR0 */
227 buf->sg_cpu[i].dsadr = pcdev->res->start + 0x28;
228 buf->sg_cpu[i].dtadr = sg_dma_address(&sg[i]);
229 /* PXA270 Developer's Manual 27.4.4.1:
230 * round up to 8 bytes */
231 xfer_len = (min(dma_len, size) + 7) & ~7;
232 if (xfer_len & 7)
233 dev_err(&icd->dev, "Unaligned buffer: "
234 "dma_len %u, size %u\n", dma_len, size);
235 buf->sg_cpu[i].dcmd = DCMD_FLOWSRC | DCMD_BURST8 |
236 DCMD_INCTRGADDR | xfer_len;
237 size -= dma_len;
238 buf->sg_cpu[i].ddadr = buf->sg_dma + (i + 1) *
239 sizeof(struct pxa_dma_desc);
240 }
241 buf->sg_cpu[dma->sglen - 1].ddadr = DDADR_STOP;
242 buf->sg_cpu[dma->sglen - 1].dcmd |= DCMD_ENDIRQEN;
243
244 vb->state = VIDEOBUF_PREPARED;
245 }
246
247 buf->inwork = 0;
248
249 return 0;
250
251fail:
252 free_buffer(vq, buf);
253out:
254 buf->inwork = 0;
255 return ret;
256}
257
258static void
259pxa_videobuf_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
260{
261 struct soc_camera_device *icd = vq->priv_data;
262 struct soc_camera_host *ici =
263 to_soc_camera_host(icd->dev.parent);
264 struct pxa_camera_dev *pcdev = ici->priv;
265 struct pxa_buffer *buf = container_of(vb, struct pxa_buffer, vb);
266 struct pxa_buffer *active = pcdev->active;
267 struct videobuf_dmabuf *dma = videobuf_to_dma(vb);
268 int nents = dma->sglen;
269 unsigned long flags;
270
271 dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d\n", __FUNCTION__,
272 vb, vb->baddr, vb->bsize);
273 spin_lock_irqsave(&pcdev->lock, flags);
274
275 list_add_tail(&vb->queue, &pcdev->capture);
276
277 vb->state = VIDEOBUF_ACTIVE;
278
279 if (!pcdev->active) {
280 CIFR |= CIFR_RESET_F;
281 DDADR(pcdev->dma_chan_y) = buf->sg_dma;
282 DCSR(pcdev->dma_chan_y) = DCSR_RUN;
283 pcdev->active = buf;
284 CICR0 |= CICR0_ENB;
285 } else {
286 struct videobuf_dmabuf *active_dma =
287 videobuf_to_dma(&active->vb);
288 /* Stop DMA engine */
289 DCSR(pcdev->dma_chan_y) = 0;
290
291 /* Add the descriptors we just initialized to the currently
292 * running chain
293 */
294 active->sg_cpu[active_dma->sglen - 1].ddadr = buf->sg_dma;
295
296 /* Setup a dummy descriptor with the DMA engines current
297 * state
298 */
299 /* CIBR0 */
300 buf->sg_cpu[nents].dsadr = pcdev->res->start + 0x28;
301 buf->sg_cpu[nents].dtadr = DTADR(pcdev->dma_chan_y);
302 buf->sg_cpu[nents].dcmd = DCMD(pcdev->dma_chan_y);
303
304 if (DDADR(pcdev->dma_chan_y) == DDADR_STOP) {
305 /* The DMA engine is on the last descriptor, set the
306 * next descriptors address to the descriptors
307 * we just initialized
308 */
309 buf->sg_cpu[nents].ddadr = buf->sg_dma;
310 } else {
311 buf->sg_cpu[nents].ddadr = DDADR(pcdev->dma_chan_y);
312 }
313
314 /* The next descriptor is the dummy descriptor */
315 DDADR(pcdev->dma_chan_y) = buf->sg_dma + nents *
316 sizeof(struct pxa_dma_desc);
317
318#ifdef DEBUG
319 if (CISR & CISR_IFO_0) {
320 dev_warn(pcdev->dev, "FIFO overrun\n");
321 DDADR(pcdev->dma_chan_y) = pcdev->active->sg_dma;
322
323 CICR0 &= ~CICR0_ENB;
324 CIFR |= CIFR_RESET_F;
325 DCSR(pcdev->dma_chan_y) = DCSR_RUN;
326 CICR0 |= CICR0_ENB;
327 } else
328#endif
329 DCSR(pcdev->dma_chan_y) = DCSR_RUN;
330 }
331
332 spin_unlock_irqrestore(&pcdev->lock, flags);
333
334}
335
336static void pxa_videobuf_release(struct videobuf_queue *vq,
337 struct videobuf_buffer *vb)
338{
339 struct pxa_buffer *buf = container_of(vb, struct pxa_buffer, vb);
340#ifdef DEBUG
341 struct soc_camera_device *icd = vq->priv_data;
342
343 dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d\n", __FUNCTION__,
344 vb, vb->baddr, vb->bsize);
345
346 switch (vb->state) {
347 case VIDEOBUF_ACTIVE:
348 dev_dbg(&icd->dev, "%s (active)\n", __FUNCTION__);
349 break;
350 case VIDEOBUF_QUEUED:
351 dev_dbg(&icd->dev, "%s (queued)\n", __FUNCTION__);
352 break;
353 case VIDEOBUF_PREPARED:
354 dev_dbg(&icd->dev, "%s (prepared)\n", __FUNCTION__);
355 break;
356 default:
357 dev_dbg(&icd->dev, "%s (unknown)\n", __FUNCTION__);
358 break;
359 }
360#endif
361
362 free_buffer(vq, buf);
363}
364
365static void pxa_camera_dma_irq_y(int channel, void *data)
366{
367 struct pxa_camera_dev *pcdev = data;
368 struct pxa_buffer *buf;
369 unsigned long flags;
370 unsigned int status;
371 struct videobuf_buffer *vb;
372
373 spin_lock_irqsave(&pcdev->lock, flags);
374
375 status = DCSR(pcdev->dma_chan_y);
376 if (status & DCSR_BUSERR) {
377 dev_err(pcdev->dev, "%s: Bus Error\n", __FUNCTION__);
378 DCSR(pcdev->dma_chan_y) |= DCSR_BUSERR;
379 goto out;
380 }
381
382 if (!(status & DCSR_ENDINTR)) {
383 dev_err(pcdev->dev, "%s: unknown dma interrupt source. "
384 "status: 0x%08x\n", __FUNCTION__, status);
385 goto out;
386 }
387
388 DCSR(pcdev->dma_chan_y) |= DCSR_ENDINTR;
389
390 if (!pcdev->active) {
391 dev_err(pcdev->dev, "%s: no active buf\n", __FUNCTION__);
392 goto out;
393 }
394
395 vb = &pcdev->active->vb;
396 buf = container_of(vb, struct pxa_buffer, vb);
397 WARN_ON(buf->inwork || list_empty(&vb->queue));
398 dev_dbg(pcdev->dev, "%s (vb=0x%p) 0x%08lx %d\n", __FUNCTION__,
399 vb, vb->baddr, vb->bsize);
400
401 /* _init is used to debug races, see comment in pxa_is_reqbufs() */
402 list_del_init(&vb->queue);
403 vb->state = VIDEOBUF_DONE;
404 do_gettimeofday(&vb->ts);
405 vb->field_count++;
406 wake_up(&vb->done);
407
408 if (list_empty(&pcdev->capture)) {
409 pcdev->active = NULL;
410 DCSR(pcdev->dma_chan_y) = 0;
411 CICR0 &= ~CICR0_ENB;
412 goto out;
413 }
414
415 pcdev->active = list_entry(pcdev->capture.next, struct pxa_buffer,
416 vb.queue);
417
418out:
419 spin_unlock_irqrestore(&pcdev->lock, flags);
420}
421
422static struct videobuf_queue_ops pxa_video_ops = {
423 .buf_setup = pxa_videobuf_setup,
424 .buf_prepare = pxa_videobuf_prepare,
425 .buf_queue = pxa_videobuf_queue,
426 .buf_release = pxa_videobuf_release,
427};
428
429static int mclk_get_divisor(struct pxa_camera_dev *pcdev)
430{
431 unsigned int mclk_10khz = pcdev->platform_mclk_10khz;
432 unsigned long div;
433 unsigned long lcdclk;
434
435 lcdclk = clk_get_rate(pcdev->clk) / 10000;
436
437 /* We verify platform_mclk_10khz != 0, so if anyone breaks it, here
438 * they get a nice Oops */
439 div = (lcdclk + 2 * mclk_10khz - 1) / (2 * mclk_10khz) - 1;
440
441 dev_dbg(pcdev->dev, "LCD clock %lukHz, target freq %dkHz, "
442 "divisor %lu\n", lcdclk * 10, mclk_10khz * 10, div);
443
444 return div;
445}
446
447static void pxa_is_activate(struct pxa_camera_dev *pcdev)
448{
449 struct pxacamera_platform_data *pdata = pcdev->pdata;
450 u32 cicr4 = 0;
451
452 dev_dbg(pcdev->dev, "Registered platform device at %p data %p\n",
453 pcdev, pdata);
454
455 if (pdata && pdata->init) {
456 dev_dbg(pcdev->dev, "%s: Init gpios\n", __FUNCTION__);
457 pdata->init(pcdev->dev);
458 }
459
460 if (pdata && pdata->power) {
461 dev_dbg(pcdev->dev, "%s: Power on camera\n", __FUNCTION__);
462 pdata->power(pcdev->dev, 1);
463 }
464
465 if (pdata && pdata->reset) {
466 dev_dbg(pcdev->dev, "%s: Releasing camera reset\n",
467 __FUNCTION__);
468 pdata->reset(pcdev->dev, 1);
469 }
470
471 CICR0 = 0x3FF; /* disable all interrupts */
472
473 if (pcdev->platform_flags & PXA_CAMERA_PCLK_EN)
474 cicr4 |= CICR4_PCLK_EN;
475 if (pcdev->platform_flags & PXA_CAMERA_MCLK_EN)
476 cicr4 |= CICR4_MCLK_EN;
477 if (pcdev->platform_flags & PXA_CAMERA_PCP)
478 cicr4 |= CICR4_PCP;
479 if (pcdev->platform_flags & PXA_CAMERA_HSP)
480 cicr4 |= CICR4_HSP;
481 if (pcdev->platform_flags & PXA_CAMERA_VSP)
482 cicr4 |= CICR4_VSP;
483
484 CICR4 = mclk_get_divisor(pcdev) | cicr4;
485
486 clk_enable(pcdev->clk);
487}
488
489static void pxa_is_deactivate(struct pxa_camera_dev *pcdev)
490{
491 struct pxacamera_platform_data *board = pcdev->pdata;
492
493 clk_disable(pcdev->clk);
494
495 if (board && board->reset) {
496 dev_dbg(pcdev->dev, "%s: Asserting camera reset\n",
497 __FUNCTION__);
498 board->reset(pcdev->dev, 0);
499 }
500
501 if (board && board->power) {
502 dev_dbg(pcdev->dev, "%s: Power off camera\n", __FUNCTION__);
503 board->power(pcdev->dev, 0);
504 }
505}
506
507static irqreturn_t pxa_camera_irq(int irq, void *data)
508{
509 struct pxa_camera_dev *pcdev = data;
510 unsigned int status = CISR;
511
512 dev_dbg(pcdev->dev, "Camera interrupt status 0x%x\n", status);
513
514 CISR = status;
515
516 return IRQ_HANDLED;
517}
518
519/* The following two functions absolutely depend on the fact, that
520 * there can be only one camera on PXA quick capture interface */
521static int pxa_is_add_device(struct soc_camera_device *icd)
522{
523 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
524 struct pxa_camera_dev *pcdev = ici->priv;
525 int ret;
526
527 mutex_lock(&camera_lock);
528
529 if (pcdev->icd) {
530 ret = -EBUSY;
531 goto ebusy;
532 }
533
534 dev_info(&icd->dev, "PXA Camera driver attached to camera %d\n",
535 icd->devnum);
536
537 pxa_is_activate(pcdev);
538 ret = icd->ops->init(icd);
539
540 if (!ret)
541 pcdev->icd = icd;
542
543ebusy:
544 mutex_unlock(&camera_lock);
545
546 return ret;
547}
548
549static void pxa_is_remove_device(struct soc_camera_device *icd)
550{
551 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
552 struct pxa_camera_dev *pcdev = ici->priv;
553
554 BUG_ON(icd != pcdev->icd);
555
556 dev_info(&icd->dev, "PXA Camera driver detached from camera %d\n",
557 icd->devnum);
558
559 /* disable capture, disable interrupts */
560 CICR0 = 0x3ff;
561 /* Stop DMA engine */
562 DCSR(pcdev->dma_chan_y) = 0;
563
564 icd->ops->release(icd);
565
566 pxa_is_deactivate(pcdev);
567
568 pcdev->icd = NULL;
569}
570
571static int pxa_is_set_capture_format(struct soc_camera_device *icd,
572 __u32 pixfmt, struct v4l2_rect *rect)
573{
574 struct soc_camera_host *ici =
575 to_soc_camera_host(icd->dev.parent);
576 struct pxa_camera_dev *pcdev = ici->priv;
577 unsigned int datawidth = 0, dw, bpp;
578 u32 cicr0, cicr4 = 0;
579 int ret;
580
581 /* If requested data width is supported by the platform, use it */
582 switch (icd->cached_datawidth) {
583 case 10:
584 if (pcdev->platform_flags & PXA_CAMERA_DATAWIDTH_10)
585 datawidth = IS_DATAWIDTH_10;
586 break;
587 case 9:
588 if (pcdev->platform_flags & PXA_CAMERA_DATAWIDTH_9)
589 datawidth = IS_DATAWIDTH_9;
590 break;
591 case 8:
592 if (pcdev->platform_flags & PXA_CAMERA_DATAWIDTH_8)
593 datawidth = IS_DATAWIDTH_8;
594 }
595 if (!datawidth)
596 return -EINVAL;
597
598 ret = icd->ops->set_capture_format(icd, pixfmt, rect,
599 datawidth |
600 (pcdev->platform_flags & PXA_CAMERA_MASTER ?
601 IS_MASTER : 0) |
602 (pcdev->platform_flags & PXA_CAMERA_HSP ?
603 0 : IS_HSYNC_ACTIVE_HIGH) |
604 (pcdev->platform_flags & PXA_CAMERA_VSP ?
605 0 : IS_VSYNC_ACTIVE_HIGH) |
606 (pcdev->platform_flags & PXA_CAMERA_PCP ?
607 0 : IS_PCLK_SAMPLE_RISING));
608 if (ret < 0)
609 return ret;
610
611 /* Datawidth is now guaranteed to be equal to one of the three values.
612 * We fix bit-per-pixel equal to data-width... */
613 switch (datawidth) {
614 case IS_DATAWIDTH_10:
615 icd->cached_datawidth = 10;
616 dw = 4;
617 bpp = 0x40;
618 break;
619 case IS_DATAWIDTH_9:
620 icd->cached_datawidth = 9;
621 dw = 3;
622 bpp = 0x20;
623 break;
624 default:
625 /* Actually it can only be 8 now,
626 * default is just to silence compiler warnings */
627 case IS_DATAWIDTH_8:
628 icd->cached_datawidth = 8;
629 dw = 2;
630 bpp = 0;
631 }
632
633 if (pcdev->platform_flags & PXA_CAMERA_PCLK_EN)
634 cicr4 |= CICR4_PCLK_EN;
635 if (pcdev->platform_flags & PXA_CAMERA_MCLK_EN)
636 cicr4 |= CICR4_MCLK_EN;
637 if (pcdev->platform_flags & PXA_CAMERA_PCP)
638 cicr4 |= CICR4_PCP;
639 if (pcdev->platform_flags & PXA_CAMERA_HSP)
640 cicr4 |= CICR4_HSP;
641 if (pcdev->platform_flags & PXA_CAMERA_VSP)
642 cicr4 |= CICR4_VSP;
643
644 cicr0 = CICR0;
645 if (cicr0 & CICR0_ENB)
646 CICR0 = cicr0 & ~CICR0_ENB;
647 CICR1 = CICR1_PPL_VAL(rect->width - 1) | bpp | dw;
648 CICR2 = 0;
649 CICR3 = CICR3_LPF_VAL(rect->height - 1) |
650 CICR3_BFW_VAL(min((unsigned short)255, icd->y_skip_top));
651 CICR4 = mclk_get_divisor(pcdev) | cicr4;
652
653 /* CIF interrupts are not used, only DMA */
654 CICR0 = (pcdev->platform_flags & PXA_CAMERA_MASTER ?
655 0 : (CICR0_SL_CAP_EN | CICR0_SIM_SP)) |
656 CICR0_DMAEN | CICR0_IRQ_MASK | (cicr0 & CICR0_ENB);
657
658 return 0;
659}
660
661static int pxa_is_try_fmt_cap(struct soc_camera_host *ici,
662 struct v4l2_format *f)
663{
664 /* limit to pxa hardware capabilities */
665 if (f->fmt.pix.height < 32)
666 f->fmt.pix.height = 32;
667 if (f->fmt.pix.height > 2048)
668 f->fmt.pix.height = 2048;
669 if (f->fmt.pix.width < 48)
670 f->fmt.pix.width = 48;
671 if (f->fmt.pix.width > 2048)
672 f->fmt.pix.width = 2048;
673 f->fmt.pix.width &= ~0x01;
674
675 return 0;
676}
677
678static int pxa_is_reqbufs(struct soc_camera_file *icf,
679 struct v4l2_requestbuffers *p)
680{
681 int i;
682
683 /* This is for locking debugging only. I removed spinlocks and now I
684 * check whether .prepare is ever called on a linked buffer, or whether
685 * a dma IRQ can occur for an in-work or unlinked buffer. Until now
686 * it hadn't triggered */
687 for (i = 0; i < p->count; i++) {
688 struct pxa_buffer *buf = container_of(icf->vb_vidq.bufs[i],
689 struct pxa_buffer, vb);
690 buf->inwork = 0;
691 INIT_LIST_HEAD(&buf->vb.queue);
692 }
693
694 return 0;
695}
696
697static unsigned int pxa_is_poll(struct file *file, poll_table *pt)
698{
699 struct soc_camera_file *icf = file->private_data;
700 struct pxa_buffer *buf;
701
702 buf = list_entry(icf->vb_vidq.stream.next, struct pxa_buffer,
703 vb.stream);
704
705 poll_wait(file, &buf->vb.done, pt);
706
707 if (buf->vb.state == VIDEOBUF_DONE ||
708 buf->vb.state == VIDEOBUF_ERROR)
709 return POLLIN|POLLRDNORM;
710
711 return 0;
712}
713
714static int pxa_is_querycap(struct soc_camera_host *ici,
715 struct v4l2_capability *cap)
716{
717 /* cap->name is set by the firendly caller:-> */
718 strlcpy(cap->card, pxa_cam_driver_description, sizeof(cap->card));
719 cap->version = PXA_CAM_VERSION_CODE;
720 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
721
722 return 0;
723}
724
725/* Should beallocated dynamically too, but we have only one. */
726static struct soc_camera_host pxa_soc_camera_host = {
727 .drv_name = PXA_CAM_DRV_NAME,
728 .vbq_ops = &pxa_video_ops,
729 .add = pxa_is_add_device,
730 .remove = pxa_is_remove_device,
731 .msize = sizeof(struct pxa_buffer),
732 .set_capture_format = pxa_is_set_capture_format,
733 .try_fmt_cap = pxa_is_try_fmt_cap,
734 .reqbufs = pxa_is_reqbufs,
735 .poll = pxa_is_poll,
736 .querycap = pxa_is_querycap,
737};
738
739static int pxa_camera_probe(struct platform_device *pdev)
740{
741 struct pxa_camera_dev *pcdev;
742 struct resource *res;
743 void __iomem *base;
744 unsigned int irq;
745 int err = 0;
746
747 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
748 irq = platform_get_irq(pdev, 0);
749 if (!res || !irq) {
750 err = -ENODEV;
751 goto exit;
752 }
753
754 pcdev = kzalloc(sizeof(*pcdev), GFP_KERNEL);
755 if (!pcdev) {
756 dev_err(&pdev->dev, "%s: Could not allocate pcdev\n",
757 __FUNCTION__);
758 err = -ENOMEM;
759 goto exit;
760 }
761
762 pcdev->clk = clk_get(&pdev->dev, "CAMCLK");
763 if (IS_ERR(pcdev->clk)) {
764 err = PTR_ERR(pcdev->clk);
765 goto exit_kfree;
766 }
767
768 dev_set_drvdata(&pdev->dev, pcdev);
769 pcdev->res = res;
770
771 pcdev->pdata = pdev->dev.platform_data;
772 pcdev->platform_flags = pcdev->pdata->flags;
773 if (!pcdev->platform_flags & (PXA_CAMERA_DATAWIDTH_8 |
774 PXA_CAMERA_DATAWIDTH_9 | PXA_CAMERA_DATAWIDTH_10)) {
775 /* Platform hasn't set available data widths. This is bad.
776 * Warn and use a default. */
777 dev_warn(&pdev->dev, "WARNING! Platform hasn't set available "
778 "data widths, using default 10 bit\n");
779 pcdev->platform_flags |= PXA_CAMERA_DATAWIDTH_10;
780 }
781 pcdev->platform_mclk_10khz = pcdev->pdata->mclk_10khz;
782 if (!pcdev->platform_mclk_10khz) {
783 dev_warn(&pdev->dev,
784 "mclk_10khz == 0! Please, fix your platform data. "
785 "Using default 20MHz\n");
786 pcdev->platform_mclk_10khz = 2000;
787 }
788
789 INIT_LIST_HEAD(&pcdev->capture);
790 spin_lock_init(&pcdev->lock);
791
792 /*
793 * Request the regions.
794 */
795 if (!request_mem_region(res->start, res->end - res->start + 1,
796 PXA_CAM_DRV_NAME)) {
797 err = -EBUSY;
798 goto exit_clk;
799 }
800
801 base = ioremap(res->start, res->end - res->start + 1);
802 if (!base) {
803 err = -ENOMEM;
804 goto exit_release;
805 }
806 pcdev->irq = irq;
807 pcdev->base = base;
808 pcdev->dev = &pdev->dev;
809
810 /* request dma */
811 pcdev->dma_chan_y = pxa_request_dma("CI_Y", DMA_PRIO_HIGH,
812 pxa_camera_dma_irq_y, pcdev);
813 if (pcdev->dma_chan_y < 0) {
814 dev_err(pcdev->dev, "Can't request DMA for Y\n");
815 err = -ENOMEM;
816 goto exit_iounmap;
817 }
818 dev_dbg(pcdev->dev, "got DMA channel %d\n", pcdev->dma_chan_y);
819
820 DRCMR68 = pcdev->dma_chan_y | DRCMR_MAPVLD;
821
822 /* request irq */
823 err = request_irq(pcdev->irq, pxa_camera_irq, 0, PXA_CAM_DRV_NAME,
824 pcdev);
825 if (err) {
826 dev_err(pcdev->dev, "Camera interrupt register failed \n");
827 goto exit_free_dma;
828 }
829
830 pxa_soc_camera_host.priv = pcdev;
831 pxa_soc_camera_host.dev.parent = &pdev->dev;
832 pxa_soc_camera_host.nr = pdev->id;
833 err = soc_camera_host_register(&pxa_soc_camera_host, THIS_MODULE);
834 if (err)
835 goto exit_free_irq;
836
837 return 0;
838
839exit_free_irq:
840 free_irq(pcdev->irq, pcdev);
841exit_free_dma:
842 pxa_free_dma(pcdev->dma_chan_y);
843exit_iounmap:
844 iounmap(base);
845exit_release:
846 release_mem_region(res->start, res->end - res->start + 1);
847exit_clk:
848 clk_put(pcdev->clk);
849exit_kfree:
850 kfree(pcdev);
851exit:
852 return err;
853}
854
855static int __devexit pxa_camera_remove(struct platform_device *pdev)
856{
857 struct pxa_camera_dev *pcdev = platform_get_drvdata(pdev);
858 struct resource *res;
859
860 clk_put(pcdev->clk);
861
862 pxa_free_dma(pcdev->dma_chan_y);
863 free_irq(pcdev->irq, pcdev);
864
865 soc_camera_host_unregister(&pxa_soc_camera_host);
866
867 iounmap(pcdev->base);
868
869 res = pcdev->res;
870 release_mem_region(res->start, res->end - res->start + 1);
871
872 kfree(pcdev);
873
874 dev_info(&pdev->dev, "%s: PXA Camera driver unloaded\n", __FUNCTION__);
875
876 return 0;
877}
878
879/*
880 * Suspend the Camera Module.
881 */
882static int pxa_camera_suspend(struct platform_device *pdev, pm_message_t level)
883{
884 struct pxa_camera_dev *pcdev = platform_get_drvdata(pdev);
885
886 dev_info(&pdev->dev, "camera suspend\n");
887 disable_irq(pcdev->irq);
888 return 0;
889}
890
891/*
892 * Resume the Camera Module.
893 */
894static int pxa_camera_resume(struct platform_device *pdev)
895{
896 struct pxa_camera_dev *pcdev = platform_get_drvdata(pdev);
897
898 dev_info(&pdev->dev, "camera resume\n");
899 enable_irq(pcdev->irq);
900
901/* if (pcdev) { */ /* FIXME: dev in use? */
902/* DRCMR68 = pcdev->dma_chan_y | DRCMR_MAPVLD; */
903/* DRCMR69 = pcdev->dma_chan_cb | DRCMR_MAPVLD; */
904/* DRCMR70 = pcdev->dma_chan_cr | DRCMR_MAPVLD; */
905/* } */
906
907 return 0;
908}
909
910
911static struct platform_driver pxa_camera_driver = {
912 .driver = {
913 .name = PXA_CAM_DRV_NAME,
914 },
915 .probe = pxa_camera_probe,
916 .remove = __exit_p(pxa_camera_remove),
917 .suspend = pxa_camera_suspend,
918 .resume = pxa_camera_resume,
919};
920
921
922static int __devinit pxa_camera_init(void)
923{
924 return platform_driver_register(&pxa_camera_driver);
925}
926
927static void __exit pxa_camera_exit(void)
928{
929 return platform_driver_unregister(&pxa_camera_driver);
930}
931
932module_init(pxa_camera_init);
933module_exit(pxa_camera_exit);
934
935MODULE_DESCRIPTION("PXA27x SoC Camera Host driver");
936MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>");
937MODULE_LICENSE("GPL");
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-05 14:34:58 -0500