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39aee69a SA |
1 | /* |
2 | * drivers/media/video/omap24xxcam.c | |
3 | * | |
4 | * OMAP 2 camera block driver. | |
5 | * | |
6 | * Copyright (C) 2004 MontaVista Software, Inc. | |
7 | * Copyright (C) 2004 Texas Instruments. | |
8 | * Copyright (C) 2007-2008 Nokia Corporation. | |
9 | * | |
10 | * Contact: Sakari Ailus <sakari.ailus@nokia.com> | |
11 | * | |
12 | * Based on code from Andy Lowe <source@mvista.com> | |
13 | * | |
14 | * This program is free software; you can redistribute it and/or | |
15 | * modify it under the terms of the GNU General Public License | |
16 | * version 2 as published by the Free Software Foundation. | |
17 | * | |
18 | * This program is distributed in the hope that it will be useful, but | |
19 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
21 | * General Public License for more details. | |
22 | * | |
23 | * You should have received a copy of the GNU General Public License | |
24 | * along with this program; if not, write to the Free Software | |
25 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA | |
26 | * 02110-1301 USA | |
27 | */ | |
28 | ||
29 | #include <linux/delay.h> | |
30 | #include <linux/kernel.h> | |
31 | #include <linux/interrupt.h> | |
32 | #include <linux/videodev2.h> | |
33 | #include <linux/pci.h> /* needed for videobufs */ | |
34 | #include <linux/version.h> | |
35 | #include <linux/platform_device.h> | |
36 | #include <linux/clk.h> | |
37 | #include <linux/io.h> | |
38 | ||
39 | #include <media/v4l2-common.h> | |
40 | #include <media/v4l2-ioctl.h> | |
41 | ||
42 | #include "omap24xxcam.h" | |
43 | ||
44 | #define OMAP24XXCAM_VERSION KERNEL_VERSION(0, 0, 0) | |
45 | ||
46 | #define RESET_TIMEOUT_NS 10000 | |
47 | ||
48 | static void omap24xxcam_reset(struct omap24xxcam_device *cam); | |
49 | static int omap24xxcam_sensor_if_enable(struct omap24xxcam_device *cam); | |
50 | static void omap24xxcam_device_unregister(struct v4l2_int_device *s); | |
51 | static int omap24xxcam_remove(struct platform_device *pdev); | |
52 | ||
53 | /* module parameters */ | |
54 | static int video_nr = -1; /* video device minor (-1 ==> auto assign) */ | |
55 | /* | |
56 | * Maximum amount of memory to use for capture buffers. | |
57 | * Default is 4800KB, enough to double-buffer SXGA. | |
58 | */ | |
59 | static int capture_mem = 1280 * 960 * 2 * 2; | |
60 | ||
61 | static struct v4l2_int_device omap24xxcam; | |
62 | ||
63 | /* | |
64 | * | |
65 | * Clocks. | |
66 | * | |
67 | */ | |
68 | ||
69 | static void omap24xxcam_clock_put(struct omap24xxcam_device *cam) | |
70 | { | |
71 | if (cam->ick != NULL && !IS_ERR(cam->ick)) | |
72 | clk_put(cam->ick); | |
73 | if (cam->fck != NULL && !IS_ERR(cam->fck)) | |
74 | clk_put(cam->fck); | |
75 | ||
76 | cam->ick = cam->fck = NULL; | |
77 | } | |
78 | ||
79 | static int omap24xxcam_clock_get(struct omap24xxcam_device *cam) | |
80 | { | |
81 | int rval = 0; | |
82 | ||
83 | cam->fck = clk_get(cam->dev, "cam_fck"); | |
84 | if (IS_ERR(cam->fck)) { | |
85 | dev_err(cam->dev, "can't get cam_fck"); | |
86 | rval = PTR_ERR(cam->fck); | |
87 | omap24xxcam_clock_put(cam); | |
88 | return rval; | |
89 | } | |
90 | ||
91 | cam->ick = clk_get(cam->dev, "cam_ick"); | |
92 | if (IS_ERR(cam->ick)) { | |
93 | dev_err(cam->dev, "can't get cam_ick"); | |
94 | rval = PTR_ERR(cam->ick); | |
95 | omap24xxcam_clock_put(cam); | |
96 | } | |
97 | ||
98 | return rval; | |
99 | } | |
100 | ||
101 | static void omap24xxcam_clock_on(struct omap24xxcam_device *cam) | |
102 | { | |
103 | clk_enable(cam->fck); | |
104 | clk_enable(cam->ick); | |
105 | } | |
106 | ||
107 | static void omap24xxcam_clock_off(struct omap24xxcam_device *cam) | |
108 | { | |
109 | clk_disable(cam->fck); | |
110 | clk_disable(cam->ick); | |
111 | } | |
112 | ||
113 | /* | |
114 | * | |
115 | * Camera core | |
116 | * | |
117 | */ | |
118 | ||
119 | /* | |
120 | * Set xclk. | |
121 | * | |
122 | * To disable xclk, use value zero. | |
123 | */ | |
124 | static void omap24xxcam_core_xclk_set(const struct omap24xxcam_device *cam, | |
125 | u32 xclk) | |
126 | { | |
127 | if (xclk) { | |
128 | u32 divisor = CAM_MCLK / xclk; | |
129 | ||
130 | if (divisor == 1) | |
131 | omap24xxcam_reg_out(cam->mmio_base + CC_REG_OFFSET, | |
132 | CC_CTRL_XCLK, | |
133 | CC_CTRL_XCLK_DIV_BYPASS); | |
134 | else | |
135 | omap24xxcam_reg_out(cam->mmio_base + CC_REG_OFFSET, | |
136 | CC_CTRL_XCLK, divisor); | |
137 | } else | |
138 | omap24xxcam_reg_out(cam->mmio_base + CC_REG_OFFSET, | |
139 | CC_CTRL_XCLK, CC_CTRL_XCLK_DIV_STABLE_LOW); | |
140 | } | |
141 | ||
142 | static void omap24xxcam_core_hwinit(const struct omap24xxcam_device *cam) | |
143 | { | |
144 | /* | |
145 | * Setting the camera core AUTOIDLE bit causes problems with frame | |
146 | * synchronization, so we will clear the AUTOIDLE bit instead. | |
147 | */ | |
148 | omap24xxcam_reg_out(cam->mmio_base + CC_REG_OFFSET, CC_SYSCONFIG, | |
149 | CC_SYSCONFIG_AUTOIDLE); | |
150 | ||
151 | /* program the camera interface DMA packet size */ | |
152 | omap24xxcam_reg_out(cam->mmio_base + CC_REG_OFFSET, CC_CTRL_DMA, | |
153 | CC_CTRL_DMA_EN | (DMA_THRESHOLD / 4 - 1)); | |
154 | ||
155 | /* enable camera core error interrupts */ | |
156 | omap24xxcam_reg_out(cam->mmio_base + CC_REG_OFFSET, CC_IRQENABLE, | |
157 | CC_IRQENABLE_FW_ERR_IRQ | |
158 | | CC_IRQENABLE_FSC_ERR_IRQ | |
159 | | CC_IRQENABLE_SSC_ERR_IRQ | |
160 | | CC_IRQENABLE_FIFO_OF_IRQ); | |
161 | } | |
162 | ||
163 | /* | |
164 | * Enable the camera core. | |
165 | * | |
166 | * Data transfer to the camera DMA starts from next starting frame. | |
167 | */ | |
168 | static void omap24xxcam_core_enable(const struct omap24xxcam_device *cam) | |
169 | { | |
170 | ||
171 | omap24xxcam_reg_out(cam->mmio_base + CC_REG_OFFSET, CC_CTRL, | |
172 | cam->cc_ctrl); | |
173 | } | |
174 | ||
175 | /* | |
176 | * Disable camera core. | |
177 | * | |
178 | * The data transfer will be stopped immediately (CC_CTRL_CC_RST). The | |
179 | * core internal state machines will be reset. Use | |
180 | * CC_CTRL_CC_FRAME_TRIG instead if you want to transfer the current | |
181 | * frame completely. | |
182 | */ | |
183 | static void omap24xxcam_core_disable(const struct omap24xxcam_device *cam) | |
184 | { | |
185 | omap24xxcam_reg_out(cam->mmio_base + CC_REG_OFFSET, CC_CTRL, | |
186 | CC_CTRL_CC_RST); | |
187 | } | |
188 | ||
189 | /* Interrupt service routine for camera core interrupts. */ | |
190 | static void omap24xxcam_core_isr(struct omap24xxcam_device *cam) | |
191 | { | |
192 | u32 cc_irqstatus; | |
193 | const u32 cc_irqstatus_err = | |
194 | CC_IRQSTATUS_FW_ERR_IRQ | |
195 | | CC_IRQSTATUS_FSC_ERR_IRQ | |
196 | | CC_IRQSTATUS_SSC_ERR_IRQ | |
197 | | CC_IRQSTATUS_FIFO_UF_IRQ | |
198 | | CC_IRQSTATUS_FIFO_OF_IRQ; | |
199 | ||
200 | cc_irqstatus = omap24xxcam_reg_in(cam->mmio_base + CC_REG_OFFSET, | |
201 | CC_IRQSTATUS); | |
202 | omap24xxcam_reg_out(cam->mmio_base + CC_REG_OFFSET, CC_IRQSTATUS, | |
203 | cc_irqstatus); | |
204 | ||
205 | if (cc_irqstatus & cc_irqstatus_err | |
206 | && !atomic_read(&cam->in_reset)) { | |
207 | dev_dbg(cam->dev, "resetting camera, cc_irqstatus 0x%x\n", | |
208 | cc_irqstatus); | |
209 | omap24xxcam_reset(cam); | |
210 | } | |
211 | } | |
212 | ||
213 | /* | |
214 | * | |
215 | * videobuf_buffer handling. | |
216 | * | |
217 | * Memory for mmapped videobuf_buffers is not allocated | |
218 | * conventionally, but by several kmalloc allocations and then | |
219 | * creating the scatterlist on our own. User-space buffers are handled | |
220 | * normally. | |
221 | * | |
222 | */ | |
223 | ||
224 | /* | |
225 | * Free the memory-mapped buffer memory allocated for a | |
226 | * videobuf_buffer and the associated scatterlist. | |
227 | */ | |
228 | static void omap24xxcam_vbq_free_mmap_buffer(struct videobuf_buffer *vb) | |
229 | { | |
230 | struct videobuf_dmabuf *dma = videobuf_to_dma(vb); | |
231 | size_t alloc_size; | |
232 | struct page *page; | |
233 | int i; | |
234 | ||
235 | if (dma->sglist == NULL) | |
236 | return; | |
237 | ||
238 | i = dma->sglen; | |
239 | while (i) { | |
240 | i--; | |
241 | alloc_size = sg_dma_len(&dma->sglist[i]); | |
242 | page = sg_page(&dma->sglist[i]); | |
243 | do { | |
244 | ClearPageReserved(page++); | |
245 | } while (alloc_size -= PAGE_SIZE); | |
246 | __free_pages(sg_page(&dma->sglist[i]), | |
247 | get_order(sg_dma_len(&dma->sglist[i]))); | |
248 | } | |
249 | ||
250 | kfree(dma->sglist); | |
251 | dma->sglist = NULL; | |
252 | } | |
253 | ||
254 | /* Release all memory related to the videobuf_queue. */ | |
255 | static void omap24xxcam_vbq_free_mmap_buffers(struct videobuf_queue *vbq) | |
256 | { | |
257 | int i; | |
258 | ||
259 | mutex_lock(&vbq->vb_lock); | |
260 | ||
261 | for (i = 0; i < VIDEO_MAX_FRAME; i++) { | |
262 | if (NULL == vbq->bufs[i]) | |
263 | continue; | |
264 | if (V4L2_MEMORY_MMAP != vbq->bufs[i]->memory) | |
265 | continue; | |
266 | vbq->ops->buf_release(vbq, vbq->bufs[i]); | |
267 | omap24xxcam_vbq_free_mmap_buffer(vbq->bufs[i]); | |
268 | kfree(vbq->bufs[i]); | |
269 | vbq->bufs[i] = NULL; | |
270 | } | |
271 | ||
272 | mutex_unlock(&vbq->vb_lock); | |
273 | ||
274 | videobuf_mmap_free(vbq); | |
275 | } | |
276 | ||
277 | /* | |
278 | * Allocate physically as contiguous as possible buffer for video | |
279 | * frame and allocate and build DMA scatter-gather list for it. | |
280 | */ | |
281 | static int omap24xxcam_vbq_alloc_mmap_buffer(struct videobuf_buffer *vb) | |
282 | { | |
283 | unsigned int order; | |
284 | size_t alloc_size, size = vb->bsize; /* vb->bsize is page aligned */ | |
285 | struct page *page; | |
286 | int max_pages, err = 0, i = 0; | |
287 | struct videobuf_dmabuf *dma = videobuf_to_dma(vb); | |
288 | ||
289 | /* | |
290 | * allocate maximum size scatter-gather list. Note this is | |
291 | * overhead. We may not use as many entries as we allocate | |
292 | */ | |
293 | max_pages = vb->bsize >> PAGE_SHIFT; | |
294 | dma->sglist = kcalloc(max_pages, sizeof(*dma->sglist), GFP_KERNEL); | |
295 | if (dma->sglist == NULL) { | |
296 | err = -ENOMEM; | |
297 | goto out; | |
298 | } | |
299 | ||
300 | while (size) { | |
301 | order = get_order(size); | |
302 | /* | |
303 | * do not over-allocate even if we would get larger | |
304 | * contiguous chunk that way | |
305 | */ | |
306 | if ((PAGE_SIZE << order) > size) | |
307 | order--; | |
308 | ||
309 | /* try to allocate as many contiguous pages as possible */ | |
310 | page = alloc_pages(GFP_KERNEL | GFP_DMA, order); | |
311 | /* if allocation fails, try to allocate smaller amount */ | |
312 | while (page == NULL) { | |
313 | order--; | |
314 | page = alloc_pages(GFP_KERNEL | GFP_DMA, order); | |
315 | if (page == NULL && !order) { | |
316 | err = -ENOMEM; | |
317 | goto out; | |
318 | } | |
319 | } | |
320 | size -= (PAGE_SIZE << order); | |
321 | ||
322 | /* append allocated chunk of pages into scatter-gather list */ | |
323 | sg_set_page(&dma->sglist[i], page, PAGE_SIZE << order, 0); | |
324 | dma->sglen++; | |
325 | i++; | |
326 | ||
327 | alloc_size = (PAGE_SIZE << order); | |
328 | ||
329 | /* clear pages before giving them to user space */ | |
330 | memset(page_address(page), 0, alloc_size); | |
331 | ||
332 | /* mark allocated pages reserved */ | |
333 | do { | |
334 | SetPageReserved(page++); | |
335 | } while (alloc_size -= PAGE_SIZE); | |
336 | } | |
337 | /* | |
338 | * REVISIT: not fully correct to assign nr_pages == sglen but | |
339 | * video-buf is passing nr_pages for e.g. unmap_sg calls | |
340 | */ | |
341 | dma->nr_pages = dma->sglen; | |
342 | dma->direction = PCI_DMA_FROMDEVICE; | |
343 | ||
344 | return 0; | |
345 | ||
346 | out: | |
347 | omap24xxcam_vbq_free_mmap_buffer(vb); | |
348 | return err; | |
349 | } | |
350 | ||
351 | static int omap24xxcam_vbq_alloc_mmap_buffers(struct videobuf_queue *vbq, | |
352 | unsigned int count) | |
353 | { | |
354 | int i, err = 0; | |
355 | struct omap24xxcam_fh *fh = | |
356 | container_of(vbq, struct omap24xxcam_fh, vbq); | |
357 | ||
358 | mutex_lock(&vbq->vb_lock); | |
359 | ||
360 | for (i = 0; i < count; i++) { | |
361 | err = omap24xxcam_vbq_alloc_mmap_buffer(vbq->bufs[i]); | |
362 | if (err) | |
363 | goto out; | |
364 | dev_dbg(fh->cam->dev, "sglen is %d for buffer %d\n", | |
365 | videobuf_to_dma(vbq->bufs[i])->sglen, i); | |
366 | } | |
367 | ||
368 | mutex_unlock(&vbq->vb_lock); | |
369 | ||
370 | return 0; | |
371 | out: | |
372 | while (i) { | |
373 | i--; | |
374 | omap24xxcam_vbq_free_mmap_buffer(vbq->bufs[i]); | |
375 | } | |
376 | ||
377 | mutex_unlock(&vbq->vb_lock); | |
378 | ||
379 | return err; | |
380 | } | |
381 | ||
382 | /* | |
383 | * This routine is called from interrupt context when a scatter-gather DMA | |
384 | * transfer of a videobuf_buffer completes. | |
385 | */ | |
386 | static void omap24xxcam_vbq_complete(struct omap24xxcam_sgdma *sgdma, | |
387 | u32 csr, void *arg) | |
388 | { | |
389 | struct omap24xxcam_device *cam = | |
390 | container_of(sgdma, struct omap24xxcam_device, sgdma); | |
391 | struct omap24xxcam_fh *fh = cam->streaming->private_data; | |
392 | struct videobuf_buffer *vb = (struct videobuf_buffer *)arg; | |
393 | const u32 csr_error = CAMDMA_CSR_MISALIGNED_ERR | |
394 | | CAMDMA_CSR_SUPERVISOR_ERR | CAMDMA_CSR_SECURE_ERR | |
395 | | CAMDMA_CSR_TRANS_ERR | CAMDMA_CSR_DROP; | |
396 | unsigned long flags; | |
397 | ||
398 | spin_lock_irqsave(&cam->core_enable_disable_lock, flags); | |
399 | if (--cam->sgdma_in_queue == 0) | |
400 | omap24xxcam_core_disable(cam); | |
401 | spin_unlock_irqrestore(&cam->core_enable_disable_lock, flags); | |
402 | ||
403 | do_gettimeofday(&vb->ts); | |
404 | vb->field_count = atomic_add_return(2, &fh->field_count); | |
405 | if (csr & csr_error) { | |
406 | vb->state = VIDEOBUF_ERROR; | |
407 | if (!atomic_read(&fh->cam->in_reset)) { | |
408 | dev_dbg(cam->dev, "resetting camera, csr 0x%x\n", csr); | |
409 | omap24xxcam_reset(cam); | |
410 | } | |
411 | } else | |
412 | vb->state = VIDEOBUF_DONE; | |
413 | wake_up(&vb->done); | |
414 | } | |
415 | ||
416 | static void omap24xxcam_vbq_release(struct videobuf_queue *vbq, | |
417 | struct videobuf_buffer *vb) | |
418 | { | |
419 | struct videobuf_dmabuf *dma = videobuf_to_dma(vb); | |
420 | ||
421 | /* wait for buffer, especially to get out of the sgdma queue */ | |
422 | videobuf_waiton(vb, 0, 0); | |
423 | if (vb->memory == V4L2_MEMORY_MMAP) { | |
424 | dma_unmap_sg(vbq->dev, dma->sglist, dma->sglen, | |
425 | dma->direction); | |
426 | dma->direction = DMA_NONE; | |
427 | } else { | |
428 | videobuf_dma_unmap(vbq, videobuf_to_dma(vb)); | |
429 | videobuf_dma_free(videobuf_to_dma(vb)); | |
430 | } | |
431 | ||
432 | vb->state = VIDEOBUF_NEEDS_INIT; | |
433 | } | |
434 | ||
435 | /* | |
436 | * Limit the number of available kernel image capture buffers based on the | |
437 | * number requested, the currently selected image size, and the maximum | |
438 | * amount of memory permitted for kernel capture buffers. | |
439 | */ | |
440 | static int omap24xxcam_vbq_setup(struct videobuf_queue *vbq, unsigned int *cnt, | |
441 | unsigned int *size) | |
442 | { | |
443 | struct omap24xxcam_fh *fh = vbq->priv_data; | |
444 | ||
445 | if (*cnt <= 0) | |
446 | *cnt = VIDEO_MAX_FRAME; /* supply a default number of buffers */ | |
447 | ||
448 | if (*cnt > VIDEO_MAX_FRAME) | |
449 | *cnt = VIDEO_MAX_FRAME; | |
450 | ||
451 | *size = fh->pix.sizeimage; | |
452 | ||
453 | /* accessing fh->cam->capture_mem is ok, it's constant */ | |
454 | while (*size * *cnt > fh->cam->capture_mem) | |
455 | (*cnt)--; | |
456 | ||
457 | return 0; | |
458 | } | |
459 | ||
460 | static int omap24xxcam_dma_iolock(struct videobuf_queue *vbq, | |
461 | struct videobuf_dmabuf *dma) | |
462 | { | |
463 | int err = 0; | |
464 | ||
465 | dma->direction = PCI_DMA_FROMDEVICE; | |
466 | if (!dma_map_sg(vbq->dev, dma->sglist, dma->sglen, dma->direction)) { | |
467 | kfree(dma->sglist); | |
468 | dma->sglist = NULL; | |
469 | dma->sglen = 0; | |
470 | err = -EIO; | |
471 | } | |
472 | ||
473 | return err; | |
474 | } | |
475 | ||
476 | static int omap24xxcam_vbq_prepare(struct videobuf_queue *vbq, | |
477 | struct videobuf_buffer *vb, | |
478 | enum v4l2_field field) | |
479 | { | |
480 | struct omap24xxcam_fh *fh = vbq->priv_data; | |
481 | int err = 0; | |
482 | ||
483 | /* | |
484 | * Accessing pix here is okay since it's constant while | |
485 | * streaming is on (and we only get called then). | |
486 | */ | |
487 | if (vb->baddr) { | |
488 | /* This is a userspace buffer. */ | |
489 | if (fh->pix.sizeimage > vb->bsize) { | |
490 | /* The buffer isn't big enough. */ | |
491 | err = -EINVAL; | |
492 | } else | |
493 | vb->size = fh->pix.sizeimage; | |
494 | } else { | |
495 | if (vb->state != VIDEOBUF_NEEDS_INIT) { | |
496 | /* | |
497 | * We have a kernel bounce buffer that has | |
498 | * already been allocated. | |
499 | */ | |
500 | if (fh->pix.sizeimage > vb->size) { | |
501 | /* | |
502 | * The image size has been changed to | |
503 | * a larger size since this buffer was | |
504 | * allocated, so we need to free and | |
505 | * reallocate it. | |
506 | */ | |
507 | omap24xxcam_vbq_release(vbq, vb); | |
508 | vb->size = fh->pix.sizeimage; | |
509 | } | |
510 | } else { | |
511 | /* We need to allocate a new kernel bounce buffer. */ | |
512 | vb->size = fh->pix.sizeimage; | |
513 | } | |
514 | } | |
515 | ||
516 | if (err) | |
517 | return err; | |
518 | ||
519 | vb->width = fh->pix.width; | |
520 | vb->height = fh->pix.height; | |
521 | vb->field = field; | |
522 | ||
523 | if (vb->state == VIDEOBUF_NEEDS_INIT) { | |
524 | if (vb->memory == V4L2_MEMORY_MMAP) | |
525 | /* | |
526 | * we have built the scatter-gather list by ourself so | |
527 | * do the scatter-gather mapping as well | |
528 | */ | |
529 | err = omap24xxcam_dma_iolock(vbq, videobuf_to_dma(vb)); | |
530 | else | |
531 | err = videobuf_iolock(vbq, vb, NULL); | |
532 | } | |
533 | ||
534 | if (!err) | |
535 | vb->state = VIDEOBUF_PREPARED; | |
536 | else | |
537 | omap24xxcam_vbq_release(vbq, vb); | |
538 | ||
539 | return err; | |
540 | } | |
541 | ||
542 | static void omap24xxcam_vbq_queue(struct videobuf_queue *vbq, | |
543 | struct videobuf_buffer *vb) | |
544 | { | |
545 | struct omap24xxcam_fh *fh = vbq->priv_data; | |
546 | struct omap24xxcam_device *cam = fh->cam; | |
547 | enum videobuf_state state = vb->state; | |
548 | unsigned long flags; | |
549 | int err; | |
550 | ||
551 | /* | |
552 | * FIXME: We're marking the buffer active since we have no | |
553 | * pretty way of marking it active exactly when the | |
554 | * scatter-gather transfer starts. | |
555 | */ | |
556 | vb->state = VIDEOBUF_ACTIVE; | |
557 | ||
558 | err = omap24xxcam_sgdma_queue(&fh->cam->sgdma, | |
559 | videobuf_to_dma(vb)->sglist, | |
560 | videobuf_to_dma(vb)->sglen, vb->size, | |
561 | omap24xxcam_vbq_complete, vb); | |
562 | ||
563 | if (!err) { | |
564 | spin_lock_irqsave(&cam->core_enable_disable_lock, flags); | |
565 | if (++cam->sgdma_in_queue == 1 | |
566 | && !atomic_read(&cam->in_reset)) | |
567 | omap24xxcam_core_enable(cam); | |
568 | spin_unlock_irqrestore(&cam->core_enable_disable_lock, flags); | |
569 | } else { | |
570 | /* | |
571 | * Oops. We're not supposed to get any errors here. | |
572 | * The only way we could get an error is if we ran out | |
573 | * of scatter-gather DMA slots, but we are supposed to | |
574 | * have at least as many scatter-gather DMA slots as | |
575 | * video buffers so that can't happen. | |
576 | */ | |
577 | dev_err(cam->dev, "failed to queue a video buffer for dma!\n"); | |
578 | dev_err(cam->dev, "likely a bug in the driver!\n"); | |
579 | vb->state = state; | |
580 | } | |
581 | } | |
582 | ||
583 | static struct videobuf_queue_ops omap24xxcam_vbq_ops = { | |
584 | .buf_setup = omap24xxcam_vbq_setup, | |
585 | .buf_prepare = omap24xxcam_vbq_prepare, | |
586 | .buf_queue = omap24xxcam_vbq_queue, | |
587 | .buf_release = omap24xxcam_vbq_release, | |
588 | }; | |
589 | ||
590 | /* | |
591 | * | |
592 | * OMAP main camera system | |
593 | * | |
594 | */ | |
595 | ||
596 | /* | |
597 | * Reset camera block to power-on state. | |
598 | */ | |
599 | static void omap24xxcam_poweron_reset(struct omap24xxcam_device *cam) | |
600 | { | |
601 | int max_loop = RESET_TIMEOUT_NS; | |
602 | ||
603 | /* Reset whole camera subsystem */ | |
604 | omap24xxcam_reg_out(cam->mmio_base, | |
605 | CAM_SYSCONFIG, | |
606 | CAM_SYSCONFIG_SOFTRESET); | |
607 | ||
608 | /* Wait till it's finished */ | |
609 | while (!(omap24xxcam_reg_in(cam->mmio_base, CAM_SYSSTATUS) | |
610 | & CAM_SYSSTATUS_RESETDONE) | |
611 | && --max_loop) { | |
612 | ndelay(1); | |
613 | } | |
614 | ||
615 | if (!(omap24xxcam_reg_in(cam->mmio_base, CAM_SYSSTATUS) | |
616 | & CAM_SYSSTATUS_RESETDONE)) | |
617 | dev_err(cam->dev, "camera soft reset timeout\n"); | |
618 | } | |
619 | ||
620 | /* | |
621 | * (Re)initialise the camera block. | |
622 | */ | |
623 | static void omap24xxcam_hwinit(struct omap24xxcam_device *cam) | |
624 | { | |
625 | omap24xxcam_poweron_reset(cam); | |
626 | ||
627 | /* set the camera subsystem autoidle bit */ | |
628 | omap24xxcam_reg_out(cam->mmio_base, CAM_SYSCONFIG, | |
629 | CAM_SYSCONFIG_AUTOIDLE); | |
630 | ||
631 | /* set the camera MMU autoidle bit */ | |
632 | omap24xxcam_reg_out(cam->mmio_base, | |
633 | CAMMMU_REG_OFFSET + CAMMMU_SYSCONFIG, | |
634 | CAMMMU_SYSCONFIG_AUTOIDLE); | |
635 | ||
636 | omap24xxcam_core_hwinit(cam); | |
637 | ||
638 | omap24xxcam_dma_hwinit(&cam->sgdma.dma); | |
639 | } | |
640 | ||
641 | /* | |
642 | * Callback for dma transfer stalling. | |
643 | */ | |
644 | static void omap24xxcam_stalled_dma_reset(unsigned long data) | |
645 | { | |
646 | struct omap24xxcam_device *cam = (struct omap24xxcam_device *)data; | |
647 | ||
648 | if (!atomic_read(&cam->in_reset)) { | |
649 | dev_dbg(cam->dev, "dma stalled, resetting camera\n"); | |
650 | omap24xxcam_reset(cam); | |
651 | } | |
652 | } | |
653 | ||
654 | /* | |
655 | * Stop capture. Mark we're doing a reset, stop DMA transfers and | |
656 | * core. (No new scatter-gather transfers will be queued whilst | |
657 | * in_reset is non-zero.) | |
658 | * | |
659 | * If omap24xxcam_capture_stop is called from several places at | |
660 | * once, only the first call will have an effect. Similarly, the last | |
661 | * call omap24xxcam_streaming_cont will have effect. | |
662 | * | |
663 | * Serialisation is ensured by using cam->core_enable_disable_lock. | |
664 | */ | |
665 | static void omap24xxcam_capture_stop(struct omap24xxcam_device *cam) | |
666 | { | |
667 | unsigned long flags; | |
668 | ||
669 | spin_lock_irqsave(&cam->core_enable_disable_lock, flags); | |
670 | ||
671 | if (atomic_inc_return(&cam->in_reset) != 1) { | |
672 | spin_unlock_irqrestore(&cam->core_enable_disable_lock, flags); | |
673 | return; | |
674 | } | |
675 | ||
676 | omap24xxcam_core_disable(cam); | |
677 | ||
678 | spin_unlock_irqrestore(&cam->core_enable_disable_lock, flags); | |
679 | ||
680 | omap24xxcam_sgdma_sync(&cam->sgdma); | |
681 | } | |
682 | ||
683 | /* | |
684 | * Reset and continue streaming. | |
685 | * | |
686 | * Note: Resetting the camera FIFO via the CC_RST bit in the CC_CTRL | |
687 | * register is supposed to be sufficient to recover from a camera | |
688 | * interface error, but it doesn't seem to be enough. If we only do | |
689 | * that then subsequent image captures are out of sync by either one | |
690 | * or two times DMA_THRESHOLD bytes. Resetting and re-initializing the | |
691 | * entire camera subsystem prevents the problem with frame | |
692 | * synchronization. | |
693 | */ | |
694 | static void omap24xxcam_capture_cont(struct omap24xxcam_device *cam) | |
695 | { | |
696 | unsigned long flags; | |
697 | ||
698 | spin_lock_irqsave(&cam->core_enable_disable_lock, flags); | |
699 | ||
700 | if (atomic_read(&cam->in_reset) != 1) | |
701 | goto out; | |
702 | ||
703 | omap24xxcam_hwinit(cam); | |
704 | ||
705 | omap24xxcam_sensor_if_enable(cam); | |
706 | ||
707 | omap24xxcam_sgdma_process(&cam->sgdma); | |
708 | ||
709 | if (cam->sgdma_in_queue) | |
710 | omap24xxcam_core_enable(cam); | |
711 | ||
712 | out: | |
713 | atomic_dec(&cam->in_reset); | |
714 | spin_unlock_irqrestore(&cam->core_enable_disable_lock, flags); | |
715 | } | |
716 | ||
717 | static ssize_t | |
718 | omap24xxcam_streaming_show(struct device *dev, struct device_attribute *attr, | |
719 | char *buf) | |
720 | { | |
721 | struct omap24xxcam_device *cam = dev_get_drvdata(dev); | |
722 | ||
723 | return sprintf(buf, "%s\n", cam->streaming ? "active" : "inactive"); | |
724 | } | |
725 | static DEVICE_ATTR(streaming, S_IRUGO, omap24xxcam_streaming_show, NULL); | |
726 | ||
727 | /* | |
728 | * Stop capture and restart it. I.e. reset the camera during use. | |
729 | */ | |
730 | static void omap24xxcam_reset(struct omap24xxcam_device *cam) | |
731 | { | |
732 | omap24xxcam_capture_stop(cam); | |
733 | omap24xxcam_capture_cont(cam); | |
734 | } | |
735 | ||
736 | /* | |
737 | * The main interrupt handler. | |
738 | */ | |
739 | static irqreturn_t omap24xxcam_isr(int irq, void *arg) | |
740 | { | |
741 | struct omap24xxcam_device *cam = (struct omap24xxcam_device *)arg; | |
742 | u32 irqstatus; | |
743 | unsigned int irqhandled = 0; | |
744 | ||
745 | irqstatus = omap24xxcam_reg_in(cam->mmio_base, CAM_IRQSTATUS); | |
746 | ||
747 | if (irqstatus & | |
748 | (CAM_IRQSTATUS_DMA_IRQ2 | CAM_IRQSTATUS_DMA_IRQ1 | |
749 | | CAM_IRQSTATUS_DMA_IRQ0)) { | |
750 | omap24xxcam_dma_isr(&cam->sgdma.dma); | |
751 | irqhandled = 1; | |
752 | } | |
753 | if (irqstatus & CAM_IRQSTATUS_CC_IRQ) { | |
754 | omap24xxcam_core_isr(cam); | |
755 | irqhandled = 1; | |
756 | } | |
757 | if (irqstatus & CAM_IRQSTATUS_MMU_IRQ) | |
758 | dev_err(cam->dev, "unhandled camera MMU interrupt!\n"); | |
759 | ||
760 | return IRQ_RETVAL(irqhandled); | |
761 | } | |
762 | ||
763 | /* | |
764 | * | |
765 | * Sensor handling. | |
766 | * | |
767 | */ | |
768 | ||
769 | /* | |
770 | * Enable the external sensor interface. Try to negotiate interface | |
771 | * parameters with the sensor and start using the new ones. The calls | |
772 | * to sensor_if_enable and sensor_if_disable need not to be balanced. | |
773 | */ | |
774 | static int omap24xxcam_sensor_if_enable(struct omap24xxcam_device *cam) | |
775 | { | |
776 | int rval; | |
777 | struct v4l2_ifparm p; | |
778 | ||
779 | rval = vidioc_int_g_ifparm(cam->sdev, &p); | |
780 | if (rval) { | |
781 | dev_err(cam->dev, "vidioc_int_g_ifparm failed with %d\n", rval); | |
782 | return rval; | |
783 | } | |
784 | ||
785 | cam->if_type = p.if_type; | |
786 | ||
787 | cam->cc_ctrl = CC_CTRL_CC_EN; | |
788 | ||
789 | switch (p.if_type) { | |
790 | case V4L2_IF_TYPE_BT656: | |
791 | if (p.u.bt656.frame_start_on_rising_vs) | |
792 | cam->cc_ctrl |= CC_CTRL_NOBT_SYNCHRO; | |
793 | if (p.u.bt656.bt_sync_correct) | |
794 | cam->cc_ctrl |= CC_CTRL_BT_CORRECT; | |
795 | if (p.u.bt656.swap) | |
796 | cam->cc_ctrl |= CC_CTRL_PAR_ORDERCAM; | |
797 | if (p.u.bt656.latch_clk_inv) | |
798 | cam->cc_ctrl |= CC_CTRL_PAR_CLK_POL; | |
799 | if (p.u.bt656.nobt_hs_inv) | |
800 | cam->cc_ctrl |= CC_CTRL_NOBT_HS_POL; | |
801 | if (p.u.bt656.nobt_vs_inv) | |
802 | cam->cc_ctrl |= CC_CTRL_NOBT_VS_POL; | |
803 | ||
804 | switch (p.u.bt656.mode) { | |
805 | case V4L2_IF_TYPE_BT656_MODE_NOBT_8BIT: | |
806 | cam->cc_ctrl |= CC_CTRL_PAR_MODE_NOBT8; | |
807 | break; | |
808 | case V4L2_IF_TYPE_BT656_MODE_NOBT_10BIT: | |
809 | cam->cc_ctrl |= CC_CTRL_PAR_MODE_NOBT10; | |
810 | break; | |
811 | case V4L2_IF_TYPE_BT656_MODE_NOBT_12BIT: | |
812 | cam->cc_ctrl |= CC_CTRL_PAR_MODE_NOBT12; | |
813 | break; | |
814 | case V4L2_IF_TYPE_BT656_MODE_BT_8BIT: | |
815 | cam->cc_ctrl |= CC_CTRL_PAR_MODE_BT8; | |
816 | break; | |
817 | case V4L2_IF_TYPE_BT656_MODE_BT_10BIT: | |
818 | cam->cc_ctrl |= CC_CTRL_PAR_MODE_BT10; | |
819 | break; | |
820 | default: | |
821 | dev_err(cam->dev, | |
822 | "bt656 interface mode %d not supported\n", | |
823 | p.u.bt656.mode); | |
824 | return -EINVAL; | |
825 | } | |
826 | /* | |
827 | * The clock rate that the sensor wants has changed. | |
828 | * We have to adjust the xclk from OMAP 2 side to | |
829 | * match the sensor's wish as closely as possible. | |
830 | */ | |
831 | if (p.u.bt656.clock_curr != cam->if_u.bt656.xclk) { | |
832 | u32 xclk = p.u.bt656.clock_curr; | |
833 | u32 divisor; | |
834 | ||
835 | if (xclk == 0) | |
836 | return -EINVAL; | |
837 | ||
838 | if (xclk > CAM_MCLK) | |
839 | xclk = CAM_MCLK; | |
840 | ||
841 | divisor = CAM_MCLK / xclk; | |
842 | if (divisor * xclk < CAM_MCLK) | |
843 | divisor++; | |
844 | if (CAM_MCLK / divisor < p.u.bt656.clock_min | |
845 | && divisor > 1) | |
846 | divisor--; | |
847 | if (divisor > 30) | |
848 | divisor = 30; | |
849 | ||
850 | xclk = CAM_MCLK / divisor; | |
851 | ||
852 | if (xclk < p.u.bt656.clock_min | |
853 | || xclk > p.u.bt656.clock_max) | |
854 | return -EINVAL; | |
855 | ||
856 | cam->if_u.bt656.xclk = xclk; | |
857 | } | |
858 | omap24xxcam_core_xclk_set(cam, cam->if_u.bt656.xclk); | |
859 | break; | |
860 | default: | |
861 | /* FIXME: how about other interfaces? */ | |
862 | dev_err(cam->dev, "interface type %d not supported\n", | |
863 | p.if_type); | |
864 | return -EINVAL; | |
865 | } | |
866 | ||
867 | return 0; | |
868 | } | |
869 | ||
870 | static void omap24xxcam_sensor_if_disable(const struct omap24xxcam_device *cam) | |
871 | { | |
872 | switch (cam->if_type) { | |
873 | case V4L2_IF_TYPE_BT656: | |
874 | omap24xxcam_core_xclk_set(cam, 0); | |
875 | break; | |
876 | } | |
877 | } | |
878 | ||
879 | /* | |
880 | * Initialise the sensor hardware. | |
881 | */ | |
882 | static int omap24xxcam_sensor_init(struct omap24xxcam_device *cam) | |
883 | { | |
884 | int err = 0; | |
885 | struct v4l2_int_device *sdev = cam->sdev; | |
886 | ||
887 | omap24xxcam_clock_on(cam); | |
888 | err = omap24xxcam_sensor_if_enable(cam); | |
889 | if (err) { | |
890 | dev_err(cam->dev, "sensor interface could not be enabled at " | |
891 | "initialisation, %d\n", err); | |
892 | cam->sdev = NULL; | |
893 | goto out; | |
894 | } | |
895 | ||
896 | /* power up sensor during sensor initialization */ | |
897 | vidioc_int_s_power(sdev, 1); | |
898 | ||
899 | err = vidioc_int_dev_init(sdev); | |
900 | if (err) { | |
901 | dev_err(cam->dev, "cannot initialize sensor, error %d\n", err); | |
902 | /* Sensor init failed --- it's nonexistent to us! */ | |
903 | cam->sdev = NULL; | |
904 | goto out; | |
905 | } | |
906 | ||
907 | dev_info(cam->dev, "sensor is %s\n", sdev->name); | |
908 | ||
909 | out: | |
910 | omap24xxcam_sensor_if_disable(cam); | |
911 | omap24xxcam_clock_off(cam); | |
912 | ||
913 | vidioc_int_s_power(sdev, 0); | |
914 | ||
915 | return err; | |
916 | } | |
917 | ||
918 | static void omap24xxcam_sensor_exit(struct omap24xxcam_device *cam) | |
919 | { | |
920 | if (cam->sdev) | |
921 | vidioc_int_dev_exit(cam->sdev); | |
922 | } | |
923 | ||
924 | static void omap24xxcam_sensor_disable(struct omap24xxcam_device *cam) | |
925 | { | |
926 | omap24xxcam_sensor_if_disable(cam); | |
927 | omap24xxcam_clock_off(cam); | |
928 | vidioc_int_s_power(cam->sdev, 0); | |
929 | } | |
930 | ||
931 | /* | |
932 | * Power-up and configure camera sensor. It's ready for capturing now. | |
933 | */ | |
934 | static int omap24xxcam_sensor_enable(struct omap24xxcam_device *cam) | |
935 | { | |
936 | int rval; | |
937 | ||
938 | omap24xxcam_clock_on(cam); | |
939 | ||
940 | omap24xxcam_sensor_if_enable(cam); | |
941 | ||
942 | rval = vidioc_int_s_power(cam->sdev, 1); | |
943 | if (rval) | |
944 | goto out; | |
945 | ||
946 | rval = vidioc_int_init(cam->sdev); | |
947 | if (rval) | |
948 | goto out; | |
949 | ||
950 | return 0; | |
951 | ||
952 | out: | |
953 | omap24xxcam_sensor_disable(cam); | |
954 | ||
955 | return rval; | |
956 | } | |
957 | ||
958 | static void omap24xxcam_sensor_reset_work(struct work_struct *work) | |
959 | { | |
960 | struct omap24xxcam_device *cam = | |
961 | container_of(work, struct omap24xxcam_device, | |
962 | sensor_reset_work); | |
963 | ||
964 | if (atomic_read(&cam->reset_disable)) | |
965 | return; | |
966 | ||
967 | omap24xxcam_capture_stop(cam); | |
968 | ||
969 | if (vidioc_int_reset(cam->sdev) == 0) { | |
970 | vidioc_int_init(cam->sdev); | |
971 | } else { | |
972 | /* Can't reset it by vidioc_int_reset. */ | |
973 | omap24xxcam_sensor_disable(cam); | |
974 | omap24xxcam_sensor_enable(cam); | |
975 | } | |
976 | ||
977 | omap24xxcam_capture_cont(cam); | |
978 | } | |
979 | ||
980 | /* | |
981 | * | |
982 | * IOCTL interface. | |
983 | * | |
984 | */ | |
985 | ||
986 | static int vidioc_querycap(struct file *file, void *fh, | |
987 | struct v4l2_capability *cap) | |
988 | { | |
989 | struct omap24xxcam_fh *ofh = fh; | |
990 | struct omap24xxcam_device *cam = ofh->cam; | |
991 | ||
992 | strlcpy(cap->driver, CAM_NAME, sizeof(cap->driver)); | |
993 | strlcpy(cap->card, cam->vfd->name, sizeof(cap->card)); | |
994 | cap->version = OMAP24XXCAM_VERSION; | |
995 | cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; | |
996 | ||
997 | return 0; | |
998 | } | |
999 | ||
1000 | static int vidioc_enum_fmt_vid_cap(struct file *file, void *fh, | |
1001 | struct v4l2_fmtdesc *f) | |
1002 | { | |
1003 | struct omap24xxcam_fh *ofh = fh; | |
1004 | struct omap24xxcam_device *cam = ofh->cam; | |
1005 | int rval; | |
1006 | ||
1007 | rval = vidioc_int_enum_fmt_cap(cam->sdev, f); | |
1008 | ||
1009 | return rval; | |
1010 | } | |
1011 | ||
1012 | static int vidioc_g_fmt_vid_cap(struct file *file, void *fh, | |
1013 | struct v4l2_format *f) | |
1014 | { | |
1015 | struct omap24xxcam_fh *ofh = fh; | |
1016 | struct omap24xxcam_device *cam = ofh->cam; | |
1017 | int rval; | |
1018 | ||
1019 | mutex_lock(&cam->mutex); | |
1020 | rval = vidioc_int_g_fmt_cap(cam->sdev, f); | |
1021 | mutex_unlock(&cam->mutex); | |
1022 | ||
1023 | return rval; | |
1024 | } | |
1025 | ||
1026 | static int vidioc_s_fmt_vid_cap(struct file *file, void *fh, | |
1027 | struct v4l2_format *f) | |
1028 | { | |
1029 | struct omap24xxcam_fh *ofh = fh; | |
1030 | struct omap24xxcam_device *cam = ofh->cam; | |
1031 | int rval; | |
1032 | ||
1033 | mutex_lock(&cam->mutex); | |
1034 | if (cam->streaming) { | |
1035 | rval = -EBUSY; | |
1036 | goto out; | |
1037 | } | |
1038 | ||
1039 | rval = vidioc_int_s_fmt_cap(cam->sdev, f); | |
1040 | ||
1041 | out: | |
1042 | mutex_unlock(&cam->mutex); | |
1043 | ||
1044 | if (!rval) { | |
1045 | mutex_lock(&ofh->vbq.vb_lock); | |
1046 | ofh->pix = f->fmt.pix; | |
1047 | mutex_unlock(&ofh->vbq.vb_lock); | |
1048 | } | |
1049 | ||
1050 | memset(f, 0, sizeof(*f)); | |
1051 | vidioc_g_fmt_vid_cap(file, fh, f); | |
1052 | ||
1053 | return rval; | |
1054 | } | |
1055 | ||
1056 | static int vidioc_try_fmt_vid_cap(struct file *file, void *fh, | |
1057 | struct v4l2_format *f) | |
1058 | { | |
1059 | struct omap24xxcam_fh *ofh = fh; | |
1060 | struct omap24xxcam_device *cam = ofh->cam; | |
1061 | int rval; | |
1062 | ||
1063 | mutex_lock(&cam->mutex); | |
1064 | rval = vidioc_int_try_fmt_cap(cam->sdev, f); | |
1065 | mutex_unlock(&cam->mutex); | |
1066 | ||
1067 | return rval; | |
1068 | } | |
1069 | ||
1070 | static int vidioc_reqbufs(struct file *file, void *fh, | |
1071 | struct v4l2_requestbuffers *b) | |
1072 | { | |
1073 | struct omap24xxcam_fh *ofh = fh; | |
1074 | struct omap24xxcam_device *cam = ofh->cam; | |
1075 | int rval; | |
1076 | ||
1077 | mutex_lock(&cam->mutex); | |
1078 | if (cam->streaming) { | |
1079 | mutex_unlock(&cam->mutex); | |
1080 | return -EBUSY; | |
1081 | } | |
1082 | ||
1083 | omap24xxcam_vbq_free_mmap_buffers(&ofh->vbq); | |
1084 | mutex_unlock(&cam->mutex); | |
1085 | ||
1086 | rval = videobuf_reqbufs(&ofh->vbq, b); | |
1087 | ||
1088 | /* | |
1089 | * Either videobuf_reqbufs failed or the buffers are not | |
1090 | * memory-mapped (which would need special attention). | |
1091 | */ | |
1092 | if (rval < 0 || b->memory != V4L2_MEMORY_MMAP) | |
1093 | goto out; | |
1094 | ||
1095 | rval = omap24xxcam_vbq_alloc_mmap_buffers(&ofh->vbq, rval); | |
1096 | if (rval) | |
1097 | omap24xxcam_vbq_free_mmap_buffers(&ofh->vbq); | |
1098 | ||
1099 | out: | |
1100 | return rval; | |
1101 | } | |
1102 | ||
1103 | static int vidioc_querybuf(struct file *file, void *fh, | |
1104 | struct v4l2_buffer *b) | |
1105 | { | |
1106 | struct omap24xxcam_fh *ofh = fh; | |
1107 | ||
1108 | return videobuf_querybuf(&ofh->vbq, b); | |
1109 | } | |
1110 | ||
1111 | static int vidioc_qbuf(struct file *file, void *fh, struct v4l2_buffer *b) | |
1112 | { | |
1113 | struct omap24xxcam_fh *ofh = fh; | |
1114 | ||
1115 | return videobuf_qbuf(&ofh->vbq, b); | |
1116 | } | |
1117 | ||
1118 | static int vidioc_dqbuf(struct file *file, void *fh, struct v4l2_buffer *b) | |
1119 | { | |
1120 | struct omap24xxcam_fh *ofh = fh; | |
1121 | struct omap24xxcam_device *cam = ofh->cam; | |
1122 | struct videobuf_buffer *vb; | |
1123 | int rval; | |
1124 | ||
1125 | videobuf_dqbuf_again: | |
1126 | rval = videobuf_dqbuf(&ofh->vbq, b, file->f_flags & O_NONBLOCK); | |
1127 | if (rval) | |
1128 | goto out; | |
1129 | ||
1130 | vb = ofh->vbq.bufs[b->index]; | |
1131 | ||
1132 | mutex_lock(&cam->mutex); | |
1133 | /* _needs_reset returns -EIO if reset is required. */ | |
1134 | rval = vidioc_int_g_needs_reset(cam->sdev, (void *)vb->baddr); | |
1135 | mutex_unlock(&cam->mutex); | |
1136 | if (rval == -EIO) | |
1137 | schedule_work(&cam->sensor_reset_work); | |
1138 | else | |
1139 | rval = 0; | |
1140 | ||
1141 | out: | |
1142 | /* | |
1143 | * This is a hack. We don't want to show -EIO to the user | |
1144 | * space. Requeue the buffer and try again if we're not doing | |
1145 | * this in non-blocking mode. | |
1146 | */ | |
1147 | if (rval == -EIO) { | |
1148 | videobuf_qbuf(&ofh->vbq, b); | |
1149 | if (!(file->f_flags & O_NONBLOCK)) | |
1150 | goto videobuf_dqbuf_again; | |
1151 | /* | |
1152 | * We don't have a videobuf_buffer now --- maybe next | |
1153 | * time... | |
1154 | */ | |
1155 | rval = -EAGAIN; | |
1156 | } | |
1157 | ||
1158 | return rval; | |
1159 | } | |
1160 | ||
1161 | static int vidioc_streamon(struct file *file, void *fh, enum v4l2_buf_type i) | |
1162 | { | |
1163 | struct omap24xxcam_fh *ofh = fh; | |
1164 | struct omap24xxcam_device *cam = ofh->cam; | |
1165 | int rval; | |
1166 | ||
1167 | mutex_lock(&cam->mutex); | |
1168 | if (cam->streaming) { | |
1169 | rval = -EBUSY; | |
1170 | goto out; | |
1171 | } | |
1172 | ||
1173 | rval = omap24xxcam_sensor_if_enable(cam); | |
1174 | if (rval) { | |
1175 | dev_dbg(cam->dev, "vidioc_int_g_ifparm failed\n"); | |
1176 | goto out; | |
1177 | } | |
1178 | ||
1179 | rval = videobuf_streamon(&ofh->vbq); | |
1180 | if (!rval) { | |
1181 | cam->streaming = file; | |
1182 | sysfs_notify(&cam->dev->kobj, NULL, "streaming"); | |
1183 | } | |
1184 | ||
1185 | out: | |
1186 | mutex_unlock(&cam->mutex); | |
1187 | ||
1188 | return rval; | |
1189 | } | |
1190 | ||
1191 | static int vidioc_streamoff(struct file *file, void *fh, enum v4l2_buf_type i) | |
1192 | { | |
1193 | struct omap24xxcam_fh *ofh = fh; | |
1194 | struct omap24xxcam_device *cam = ofh->cam; | |
1195 | struct videobuf_queue *q = &ofh->vbq; | |
1196 | int rval; | |
1197 | ||
1198 | atomic_inc(&cam->reset_disable); | |
1199 | ||
1200 | flush_scheduled_work(); | |
1201 | ||
1202 | rval = videobuf_streamoff(q); | |
1203 | if (!rval) { | |
1204 | mutex_lock(&cam->mutex); | |
1205 | cam->streaming = NULL; | |
1206 | mutex_unlock(&cam->mutex); | |
1207 | sysfs_notify(&cam->dev->kobj, NULL, "streaming"); | |
1208 | } | |
1209 | ||
1210 | atomic_dec(&cam->reset_disable); | |
1211 | ||
1212 | return rval; | |
1213 | } | |
1214 | ||
1215 | static int vidioc_enum_input(struct file *file, void *fh, | |
1216 | struct v4l2_input *inp) | |
1217 | { | |
1218 | if (inp->index > 0) | |
1219 | return -EINVAL; | |
1220 | ||
1221 | strlcpy(inp->name, "camera", sizeof(inp->name)); | |
1222 | inp->type = V4L2_INPUT_TYPE_CAMERA; | |
1223 | ||
1224 | return 0; | |
1225 | } | |
1226 | ||
1227 | static int vidioc_g_input(struct file *file, void *fh, unsigned int *i) | |
1228 | { | |
1229 | *i = 0; | |
1230 | ||
1231 | return 0; | |
1232 | } | |
1233 | ||
1234 | static int vidioc_s_input(struct file *file, void *fh, unsigned int i) | |
1235 | { | |
1236 | if (i > 0) | |
1237 | return -EINVAL; | |
1238 | ||
1239 | return 0; | |
1240 | } | |
1241 | ||
1242 | static int vidioc_queryctrl(struct file *file, void *fh, | |
1243 | struct v4l2_queryctrl *a) | |
1244 | { | |
1245 | struct omap24xxcam_fh *ofh = fh; | |
1246 | struct omap24xxcam_device *cam = ofh->cam; | |
1247 | int rval; | |
1248 | ||
1249 | rval = vidioc_int_queryctrl(cam->sdev, a); | |
1250 | ||
1251 | return rval; | |
1252 | } | |
1253 | ||
1254 | static int vidioc_g_ctrl(struct file *file, void *fh, | |
1255 | struct v4l2_control *a) | |
1256 | { | |
1257 | struct omap24xxcam_fh *ofh = fh; | |
1258 | struct omap24xxcam_device *cam = ofh->cam; | |
1259 | int rval; | |
1260 | ||
1261 | mutex_lock(&cam->mutex); | |
1262 | rval = vidioc_int_g_ctrl(cam->sdev, a); | |
1263 | mutex_unlock(&cam->mutex); | |
1264 | ||
1265 | return rval; | |
1266 | } | |
1267 | ||
1268 | static int vidioc_s_ctrl(struct file *file, void *fh, | |
1269 | struct v4l2_control *a) | |
1270 | { | |
1271 | struct omap24xxcam_fh *ofh = fh; | |
1272 | struct omap24xxcam_device *cam = ofh->cam; | |
1273 | int rval; | |
1274 | ||
1275 | mutex_lock(&cam->mutex); | |
1276 | rval = vidioc_int_s_ctrl(cam->sdev, a); | |
1277 | mutex_unlock(&cam->mutex); | |
1278 | ||
1279 | return rval; | |
1280 | } | |
1281 | ||
1282 | static int vidioc_g_parm(struct file *file, void *fh, | |
1283 | struct v4l2_streamparm *a) { | |
1284 | struct omap24xxcam_fh *ofh = fh; | |
1285 | struct omap24xxcam_device *cam = ofh->cam; | |
1286 | int rval; | |
1287 | ||
1288 | if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
1289 | return -EINVAL; | |
1290 | ||
1291 | mutex_lock(&cam->mutex); | |
1292 | rval = vidioc_int_g_parm(cam->sdev, a); | |
1293 | mutex_unlock(&cam->mutex); | |
1294 | ||
1295 | return rval; | |
1296 | } | |
1297 | ||
1298 | static int vidioc_s_parm(struct file *file, void *fh, | |
1299 | struct v4l2_streamparm *a) | |
1300 | { | |
1301 | struct omap24xxcam_fh *ofh = fh; | |
1302 | struct omap24xxcam_device *cam = ofh->cam; | |
1303 | struct v4l2_streamparm old_streamparm; | |
1304 | int rval; | |
1305 | ||
1306 | if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
1307 | return -EINVAL; | |
1308 | ||
1309 | mutex_lock(&cam->mutex); | |
1310 | if (cam->streaming) { | |
1311 | rval = -EBUSY; | |
1312 | goto out; | |
1313 | } | |
1314 | ||
1315 | old_streamparm.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
1316 | rval = vidioc_int_g_parm(cam->sdev, &old_streamparm); | |
1317 | if (rval) | |
1318 | goto out; | |
1319 | ||
1320 | rval = vidioc_int_s_parm(cam->sdev, a); | |
1321 | if (rval) | |
1322 | goto out; | |
1323 | ||
1324 | rval = omap24xxcam_sensor_if_enable(cam); | |
1325 | /* | |
1326 | * Revert to old streaming parameters if enabling sensor | |
1327 | * interface with the new ones failed. | |
1328 | */ | |
1329 | if (rval) | |
1330 | vidioc_int_s_parm(cam->sdev, &old_streamparm); | |
1331 | ||
1332 | out: | |
1333 | mutex_unlock(&cam->mutex); | |
1334 | ||
1335 | return rval; | |
1336 | } | |
1337 | ||
1338 | /* | |
1339 | * | |
1340 | * File operations. | |
1341 | * | |
1342 | */ | |
1343 | ||
1344 | static unsigned int omap24xxcam_poll(struct file *file, | |
1345 | struct poll_table_struct *wait) | |
1346 | { | |
1347 | struct omap24xxcam_fh *fh = file->private_data; | |
1348 | struct omap24xxcam_device *cam = fh->cam; | |
1349 | struct videobuf_buffer *vb; | |
1350 | ||
1351 | mutex_lock(&cam->mutex); | |
1352 | if (cam->streaming != file) { | |
1353 | mutex_unlock(&cam->mutex); | |
1354 | return POLLERR; | |
1355 | } | |
1356 | mutex_unlock(&cam->mutex); | |
1357 | ||
1358 | mutex_lock(&fh->vbq.vb_lock); | |
1359 | if (list_empty(&fh->vbq.stream)) { | |
1360 | mutex_unlock(&fh->vbq.vb_lock); | |
1361 | return POLLERR; | |
1362 | } | |
1363 | vb = list_entry(fh->vbq.stream.next, struct videobuf_buffer, stream); | |
1364 | mutex_unlock(&fh->vbq.vb_lock); | |
1365 | ||
1366 | poll_wait(file, &vb->done, wait); | |
1367 | ||
1368 | if (vb->state == VIDEOBUF_DONE || vb->state == VIDEOBUF_ERROR) | |
1369 | return POLLIN | POLLRDNORM; | |
1370 | ||
1371 | return 0; | |
1372 | } | |
1373 | ||
1374 | static int omap24xxcam_mmap_buffers(struct file *file, | |
1375 | struct vm_area_struct *vma) | |
1376 | { | |
1377 | struct omap24xxcam_fh *fh = file->private_data; | |
1378 | struct omap24xxcam_device *cam = fh->cam; | |
1379 | struct videobuf_queue *vbq = &fh->vbq; | |
1380 | unsigned int first, last, size, i, j; | |
1381 | int err = 0; | |
1382 | ||
1383 | mutex_lock(&cam->mutex); | |
1384 | if (cam->streaming) { | |
1385 | mutex_unlock(&cam->mutex); | |
1386 | return -EBUSY; | |
1387 | } | |
1388 | mutex_unlock(&cam->mutex); | |
1389 | mutex_lock(&vbq->vb_lock); | |
1390 | ||
1391 | /* look for first buffer to map */ | |
1392 | for (first = 0; first < VIDEO_MAX_FRAME; first++) { | |
1393 | if (NULL == vbq->bufs[first]) | |
1394 | continue; | |
1395 | if (V4L2_MEMORY_MMAP != vbq->bufs[first]->memory) | |
1396 | continue; | |
1397 | if (vbq->bufs[first]->boff == (vma->vm_pgoff << PAGE_SHIFT)) | |
1398 | break; | |
1399 | } | |
1400 | ||
1401 | /* look for last buffer to map */ | |
1402 | for (size = 0, last = first; last < VIDEO_MAX_FRAME; last++) { | |
1403 | if (NULL == vbq->bufs[last]) | |
1404 | continue; | |
1405 | if (V4L2_MEMORY_MMAP != vbq->bufs[last]->memory) | |
1406 | continue; | |
1407 | size += vbq->bufs[last]->bsize; | |
1408 | if (size == (vma->vm_end - vma->vm_start)) | |
1409 | break; | |
1410 | } | |
1411 | ||
1412 | size = 0; | |
1413 | for (i = first; i <= last; i++) { | |
1414 | struct videobuf_dmabuf *dma = videobuf_to_dma(vbq->bufs[i]); | |
1415 | ||
1416 | for (j = 0; j < dma->sglen; j++) { | |
1417 | err = remap_pfn_range( | |
1418 | vma, vma->vm_start + size, | |
1419 | page_to_pfn(sg_page(&dma->sglist[j])), | |
1420 | sg_dma_len(&dma->sglist[j]), vma->vm_page_prot); | |
1421 | if (err) | |
1422 | goto out; | |
1423 | size += sg_dma_len(&dma->sglist[j]); | |
1424 | } | |
1425 | } | |
1426 | ||
1427 | out: | |
1428 | mutex_unlock(&vbq->vb_lock); | |
1429 | ||
1430 | return err; | |
1431 | } | |
1432 | ||
1433 | static int omap24xxcam_mmap(struct file *file, struct vm_area_struct *vma) | |
1434 | { | |
1435 | struct omap24xxcam_fh *fh = file->private_data; | |
1436 | int rval; | |
1437 | ||
1438 | /* let the video-buf mapper check arguments and set-up structures */ | |
1439 | rval = videobuf_mmap_mapper(&fh->vbq, vma); | |
1440 | if (rval) | |
1441 | return rval; | |
1442 | ||
1443 | vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); | |
1444 | ||
1445 | /* do mapping to our allocated buffers */ | |
1446 | rval = omap24xxcam_mmap_buffers(file, vma); | |
1447 | /* | |
1448 | * In case of error, free vma->vm_private_data allocated by | |
1449 | * videobuf_mmap_mapper. | |
1450 | */ | |
1451 | if (rval) | |
1452 | kfree(vma->vm_private_data); | |
1453 | ||
1454 | return rval; | |
1455 | } | |
1456 | ||
bec43661 | 1457 | static int omap24xxcam_open(struct file *file) |
39aee69a | 1458 | { |
bec43661 | 1459 | int minor = video_devdata(file)->minor; |
39aee69a SA |
1460 | struct omap24xxcam_device *cam = omap24xxcam.priv; |
1461 | struct omap24xxcam_fh *fh; | |
1462 | struct v4l2_format format; | |
1463 | ||
1464 | if (!cam || !cam->vfd || (cam->vfd->minor != minor)) | |
1465 | return -ENODEV; | |
1466 | ||
1467 | fh = kzalloc(sizeof(*fh), GFP_KERNEL); | |
1468 | if (fh == NULL) | |
1469 | return -ENOMEM; | |
1470 | ||
1471 | mutex_lock(&cam->mutex); | |
1472 | if (cam->sdev == NULL || !try_module_get(cam->sdev->module)) { | |
1473 | mutex_unlock(&cam->mutex); | |
1474 | goto out_try_module_get; | |
1475 | } | |
1476 | ||
1477 | if (atomic_inc_return(&cam->users) == 1) { | |
1478 | omap24xxcam_hwinit(cam); | |
1479 | if (omap24xxcam_sensor_enable(cam)) { | |
1480 | mutex_unlock(&cam->mutex); | |
1481 | goto out_omap24xxcam_sensor_enable; | |
1482 | } | |
1483 | } | |
1484 | mutex_unlock(&cam->mutex); | |
1485 | ||
1486 | fh->cam = cam; | |
1487 | mutex_lock(&cam->mutex); | |
1488 | vidioc_int_g_fmt_cap(cam->sdev, &format); | |
1489 | mutex_unlock(&cam->mutex); | |
1490 | /* FIXME: how about fh->pix when there are more users? */ | |
1491 | fh->pix = format.fmt.pix; | |
1492 | ||
1493 | file->private_data = fh; | |
1494 | ||
1495 | spin_lock_init(&fh->vbq_lock); | |
1496 | ||
1497 | videobuf_queue_sg_init(&fh->vbq, &omap24xxcam_vbq_ops, NULL, | |
1498 | &fh->vbq_lock, V4L2_BUF_TYPE_VIDEO_CAPTURE, | |
1499 | V4L2_FIELD_NONE, | |
1500 | sizeof(struct videobuf_buffer), fh); | |
1501 | ||
1502 | return 0; | |
1503 | ||
1504 | out_omap24xxcam_sensor_enable: | |
1505 | omap24xxcam_poweron_reset(cam); | |
1506 | module_put(cam->sdev->module); | |
1507 | ||
1508 | out_try_module_get: | |
1509 | kfree(fh); | |
1510 | ||
1511 | return -ENODEV; | |
1512 | } | |
1513 | ||
bec43661 | 1514 | static int omap24xxcam_release(struct file *file) |
39aee69a SA |
1515 | { |
1516 | struct omap24xxcam_fh *fh = file->private_data; | |
1517 | struct omap24xxcam_device *cam = fh->cam; | |
1518 | ||
1519 | atomic_inc(&cam->reset_disable); | |
1520 | ||
1521 | flush_scheduled_work(); | |
1522 | ||
1523 | /* stop streaming capture */ | |
1524 | videobuf_streamoff(&fh->vbq); | |
1525 | ||
1526 | mutex_lock(&cam->mutex); | |
1527 | if (cam->streaming == file) { | |
1528 | cam->streaming = NULL; | |
1529 | mutex_unlock(&cam->mutex); | |
1530 | sysfs_notify(&cam->dev->kobj, NULL, "streaming"); | |
1531 | } else { | |
1532 | mutex_unlock(&cam->mutex); | |
1533 | } | |
1534 | ||
1535 | atomic_dec(&cam->reset_disable); | |
1536 | ||
1537 | omap24xxcam_vbq_free_mmap_buffers(&fh->vbq); | |
1538 | ||
1539 | /* | |
1540 | * Make sure the reset work we might have scheduled is not | |
1541 | * pending! It may be run *only* if we have users. (And it may | |
1542 | * not be scheduled anymore since streaming is already | |
1543 | * disabled.) | |
1544 | */ | |
1545 | flush_scheduled_work(); | |
1546 | ||
1547 | mutex_lock(&cam->mutex); | |
1548 | if (atomic_dec_return(&cam->users) == 0) { | |
1549 | omap24xxcam_sensor_disable(cam); | |
1550 | omap24xxcam_poweron_reset(cam); | |
1551 | } | |
1552 | mutex_unlock(&cam->mutex); | |
1553 | ||
1554 | file->private_data = NULL; | |
1555 | ||
1556 | module_put(cam->sdev->module); | |
1557 | kfree(fh); | |
1558 | ||
1559 | return 0; | |
1560 | } | |
1561 | ||
bec43661 | 1562 | static struct v4l2_file_operations omap24xxcam_fops = { |
39aee69a SA |
1563 | .ioctl = video_ioctl2, |
1564 | .poll = omap24xxcam_poll, | |
1565 | .mmap = omap24xxcam_mmap, | |
1566 | .open = omap24xxcam_open, | |
1567 | .release = omap24xxcam_release, | |
1568 | }; | |
1569 | ||
1570 | /* | |
1571 | * | |
1572 | * Power management. | |
1573 | * | |
1574 | */ | |
1575 | ||
1576 | #ifdef CONFIG_PM | |
1577 | static int omap24xxcam_suspend(struct platform_device *pdev, pm_message_t state) | |
1578 | { | |
1579 | struct omap24xxcam_device *cam = platform_get_drvdata(pdev); | |
1580 | ||
1581 | if (atomic_read(&cam->users) == 0) | |
1582 | return 0; | |
1583 | ||
1584 | if (!atomic_read(&cam->reset_disable)) | |
1585 | omap24xxcam_capture_stop(cam); | |
1586 | ||
1587 | omap24xxcam_sensor_disable(cam); | |
1588 | omap24xxcam_poweron_reset(cam); | |
1589 | ||
1590 | return 0; | |
1591 | } | |
1592 | ||
1593 | static int omap24xxcam_resume(struct platform_device *pdev) | |
1594 | { | |
1595 | struct omap24xxcam_device *cam = platform_get_drvdata(pdev); | |
1596 | ||
1597 | if (atomic_read(&cam->users) == 0) | |
1598 | return 0; | |
1599 | ||
1600 | omap24xxcam_hwinit(cam); | |
1601 | omap24xxcam_sensor_enable(cam); | |
1602 | ||
1603 | if (!atomic_read(&cam->reset_disable)) | |
1604 | omap24xxcam_capture_cont(cam); | |
1605 | ||
1606 | return 0; | |
1607 | } | |
1608 | #endif /* CONFIG_PM */ | |
1609 | ||
1610 | static const struct v4l2_ioctl_ops omap24xxcam_ioctl_fops = { | |
1611 | .vidioc_querycap = vidioc_querycap, | |
1612 | .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, | |
1613 | .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, | |
1614 | .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, | |
1615 | .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, | |
1616 | .vidioc_reqbufs = vidioc_reqbufs, | |
1617 | .vidioc_querybuf = vidioc_querybuf, | |
1618 | .vidioc_qbuf = vidioc_qbuf, | |
1619 | .vidioc_dqbuf = vidioc_dqbuf, | |
1620 | .vidioc_streamon = vidioc_streamon, | |
1621 | .vidioc_streamoff = vidioc_streamoff, | |
1622 | .vidioc_enum_input = vidioc_enum_input, | |
1623 | .vidioc_g_input = vidioc_g_input, | |
1624 | .vidioc_s_input = vidioc_s_input, | |
1625 | .vidioc_queryctrl = vidioc_queryctrl, | |
1626 | .vidioc_g_ctrl = vidioc_g_ctrl, | |
1627 | .vidioc_s_ctrl = vidioc_s_ctrl, | |
1628 | .vidioc_g_parm = vidioc_g_parm, | |
1629 | .vidioc_s_parm = vidioc_s_parm, | |
1630 | }; | |
1631 | ||
1632 | /* | |
1633 | * | |
1634 | * Camera device (i.e. /dev/video). | |
1635 | * | |
1636 | */ | |
1637 | ||
1638 | static int omap24xxcam_device_register(struct v4l2_int_device *s) | |
1639 | { | |
1640 | struct omap24xxcam_device *cam = s->u.slave->master->priv; | |
1641 | struct video_device *vfd; | |
1642 | int rval; | |
1643 | ||
1644 | /* We already have a slave. */ | |
1645 | if (cam->sdev) | |
1646 | return -EBUSY; | |
1647 | ||
1648 | cam->sdev = s; | |
1649 | ||
1650 | if (device_create_file(cam->dev, &dev_attr_streaming) != 0) { | |
1651 | dev_err(cam->dev, "could not register sysfs entry\n"); | |
1652 | rval = -EBUSY; | |
1653 | goto err; | |
1654 | } | |
1655 | ||
1656 | /* initialize the video_device struct */ | |
1657 | vfd = cam->vfd = video_device_alloc(); | |
1658 | if (!vfd) { | |
1659 | dev_err(cam->dev, "could not allocate video device struct\n"); | |
1660 | rval = -ENOMEM; | |
1661 | goto err; | |
1662 | } | |
1663 | vfd->release = video_device_release; | |
1664 | ||
1665 | vfd->parent = cam->dev; | |
1666 | ||
1667 | strlcpy(vfd->name, CAM_NAME, sizeof(vfd->name)); | |
1668 | vfd->vfl_type = VID_TYPE_CAPTURE | VID_TYPE_CHROMAKEY; | |
1669 | vfd->fops = &omap24xxcam_fops; | |
1670 | vfd->minor = -1; | |
1671 | vfd->ioctl_ops = &omap24xxcam_ioctl_fops; | |
1672 | ||
1673 | omap24xxcam_hwinit(cam); | |
1674 | ||
1675 | rval = omap24xxcam_sensor_init(cam); | |
1676 | if (rval) | |
1677 | goto err; | |
1678 | ||
1679 | if (video_register_device(vfd, VFL_TYPE_GRABBER, video_nr) < 0) { | |
1680 | dev_err(cam->dev, "could not register V4L device\n"); | |
1681 | vfd->minor = -1; | |
1682 | rval = -EBUSY; | |
1683 | goto err; | |
1684 | } | |
1685 | ||
1686 | omap24xxcam_poweron_reset(cam); | |
1687 | ||
1688 | dev_info(cam->dev, "registered device video%d\n", vfd->minor); | |
1689 | ||
1690 | return 0; | |
1691 | ||
1692 | err: | |
1693 | omap24xxcam_device_unregister(s); | |
1694 | ||
1695 | return rval; | |
1696 | } | |
1697 | ||
1698 | static void omap24xxcam_device_unregister(struct v4l2_int_device *s) | |
1699 | { | |
1700 | struct omap24xxcam_device *cam = s->u.slave->master->priv; | |
1701 | ||
1702 | omap24xxcam_sensor_exit(cam); | |
1703 | ||
1704 | if (cam->vfd) { | |
1705 | if (cam->vfd->minor == -1) { | |
1706 | /* | |
1707 | * The device was never registered, so release the | |
1708 | * video_device struct directly. | |
1709 | */ | |
1710 | video_device_release(cam->vfd); | |
1711 | } else { | |
1712 | /* | |
1713 | * The unregister function will release the | |
1714 | * video_device struct as well as | |
1715 | * unregistering it. | |
1716 | */ | |
1717 | video_unregister_device(cam->vfd); | |
1718 | } | |
1719 | cam->vfd = NULL; | |
1720 | } | |
1721 | ||
1722 | device_remove_file(cam->dev, &dev_attr_streaming); | |
1723 | ||
1724 | cam->sdev = NULL; | |
1725 | } | |
1726 | ||
1727 | static struct v4l2_int_master omap24xxcam_master = { | |
1728 | .attach = omap24xxcam_device_register, | |
1729 | .detach = omap24xxcam_device_unregister, | |
1730 | }; | |
1731 | ||
1732 | static struct v4l2_int_device omap24xxcam = { | |
1733 | .module = THIS_MODULE, | |
1734 | .name = CAM_NAME, | |
1735 | .type = v4l2_int_type_master, | |
1736 | .u = { | |
1737 | .master = &omap24xxcam_master | |
1738 | }, | |
1739 | }; | |
1740 | ||
1741 | /* | |
1742 | * | |
1743 | * Driver initialisation and deinitialisation. | |
1744 | * | |
1745 | */ | |
1746 | ||
1747 | static int __init omap24xxcam_probe(struct platform_device *pdev) | |
1748 | { | |
1749 | struct omap24xxcam_device *cam; | |
1750 | struct resource *mem; | |
1751 | int irq; | |
1752 | ||
1753 | cam = kzalloc(sizeof(*cam), GFP_KERNEL); | |
1754 | if (!cam) { | |
1755 | dev_err(&pdev->dev, "could not allocate memory\n"); | |
1756 | goto err; | |
1757 | } | |
1758 | ||
1759 | platform_set_drvdata(pdev, cam); | |
1760 | ||
1761 | cam->dev = &pdev->dev; | |
1762 | ||
1763 | /* | |
1764 | * Impose a lower limit on the amount of memory allocated for | |
1765 | * capture. We require at least enough memory to double-buffer | |
1766 | * QVGA (300KB). | |
1767 | */ | |
1768 | if (capture_mem < 320 * 240 * 2 * 2) | |
1769 | capture_mem = 320 * 240 * 2 * 2; | |
1770 | cam->capture_mem = capture_mem; | |
1771 | ||
1772 | /* request the mem region for the camera registers */ | |
1773 | mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1774 | if (!mem) { | |
1775 | dev_err(cam->dev, "no mem resource?\n"); | |
1776 | goto err; | |
1777 | } | |
1778 | if (!request_mem_region(mem->start, (mem->end - mem->start) + 1, | |
1779 | pdev->name)) { | |
1780 | dev_err(cam->dev, | |
1781 | "cannot reserve camera register I/O region\n"); | |
1782 | goto err; | |
1783 | } | |
1784 | cam->mmio_base_phys = mem->start; | |
1785 | cam->mmio_size = (mem->end - mem->start) + 1; | |
1786 | ||
1787 | /* map the region */ | |
1788 | cam->mmio_base = (unsigned long) | |
1789 | ioremap_nocache(cam->mmio_base_phys, cam->mmio_size); | |
1790 | if (!cam->mmio_base) { | |
1791 | dev_err(cam->dev, "cannot map camera register I/O region\n"); | |
1792 | goto err; | |
1793 | } | |
1794 | ||
1795 | irq = platform_get_irq(pdev, 0); | |
1796 | if (irq <= 0) { | |
1797 | dev_err(cam->dev, "no irq for camera?\n"); | |
1798 | goto err; | |
1799 | } | |
1800 | ||
1801 | /* install the interrupt service routine */ | |
1802 | if (request_irq(irq, omap24xxcam_isr, 0, CAM_NAME, cam)) { | |
1803 | dev_err(cam->dev, | |
1804 | "could not install interrupt service routine\n"); | |
1805 | goto err; | |
1806 | } | |
1807 | cam->irq = irq; | |
1808 | ||
1809 | if (omap24xxcam_clock_get(cam)) | |
1810 | goto err; | |
1811 | ||
1812 | INIT_WORK(&cam->sensor_reset_work, omap24xxcam_sensor_reset_work); | |
1813 | ||
1814 | mutex_init(&cam->mutex); | |
1815 | spin_lock_init(&cam->core_enable_disable_lock); | |
1816 | ||
1817 | omap24xxcam_sgdma_init(&cam->sgdma, | |
1818 | cam->mmio_base + CAMDMA_REG_OFFSET, | |
1819 | omap24xxcam_stalled_dma_reset, | |
1820 | (unsigned long)cam); | |
1821 | ||
1822 | omap24xxcam.priv = cam; | |
1823 | ||
1824 | if (v4l2_int_device_register(&omap24xxcam)) | |
1825 | goto err; | |
1826 | ||
1827 | return 0; | |
1828 | ||
1829 | err: | |
1830 | omap24xxcam_remove(pdev); | |
1831 | return -ENODEV; | |
1832 | } | |
1833 | ||
1834 | static int omap24xxcam_remove(struct platform_device *pdev) | |
1835 | { | |
1836 | struct omap24xxcam_device *cam = platform_get_drvdata(pdev); | |
1837 | ||
1838 | if (!cam) | |
1839 | return 0; | |
1840 | ||
1841 | if (omap24xxcam.priv != NULL) | |
1842 | v4l2_int_device_unregister(&omap24xxcam); | |
1843 | omap24xxcam.priv = NULL; | |
1844 | ||
1845 | omap24xxcam_clock_put(cam); | |
1846 | ||
1847 | if (cam->irq) { | |
1848 | free_irq(cam->irq, cam); | |
1849 | cam->irq = 0; | |
1850 | } | |
1851 | ||
1852 | if (cam->mmio_base) { | |
1853 | iounmap((void *)cam->mmio_base); | |
1854 | cam->mmio_base = 0; | |
1855 | } | |
1856 | ||
1857 | if (cam->mmio_base_phys) { | |
1858 | release_mem_region(cam->mmio_base_phys, cam->mmio_size); | |
1859 | cam->mmio_base_phys = 0; | |
1860 | } | |
1861 | ||
1862 | kfree(cam); | |
1863 | ||
1864 | return 0; | |
1865 | } | |
1866 | ||
1867 | static struct platform_driver omap24xxcam_driver = { | |
1868 | .probe = omap24xxcam_probe, | |
1869 | .remove = omap24xxcam_remove, | |
1870 | #ifdef CONFIG_PM | |
1871 | .suspend = omap24xxcam_suspend, | |
1872 | .resume = omap24xxcam_resume, | |
1873 | #endif | |
1874 | .driver = { | |
1875 | .name = CAM_NAME, | |
1876 | .owner = THIS_MODULE, | |
1877 | }, | |
1878 | }; | |
1879 | ||
1880 | /* | |
1881 | * | |
1882 | * Module initialisation and deinitialisation | |
1883 | * | |
1884 | */ | |
1885 | ||
1886 | static int __init omap24xxcam_init(void) | |
1887 | { | |
1888 | return platform_driver_register(&omap24xxcam_driver); | |
1889 | } | |
1890 | ||
1891 | static void __exit omap24xxcam_cleanup(void) | |
1892 | { | |
1893 | platform_driver_unregister(&omap24xxcam_driver); | |
1894 | } | |
1895 | ||
1896 | MODULE_AUTHOR("Sakari Ailus <sakari.ailus@nokia.com>"); | |
1897 | MODULE_DESCRIPTION("OMAP24xx Video for Linux camera driver"); | |
1898 | MODULE_LICENSE("GPL"); | |
1899 | module_param(video_nr, int, 0); | |
1900 | MODULE_PARM_DESC(video_nr, | |
1901 | "Minor number for video device (-1 ==> auto assign)"); | |
1902 | module_param(capture_mem, int, 0); | |
1903 | MODULE_PARM_DESC(capture_mem, "Maximum amount of memory for capture " | |
1904 | "buffers (default 4800kiB)"); | |
1905 | ||
1906 | module_init(omap24xxcam_init); | |
1907 | module_exit(omap24xxcam_cleanup); |