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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> | |
5a0e3ad6 | 38 | #include <linux/slab.h> |
39aee69a SA |
39 | |
40 | #include <media/v4l2-common.h> | |
41 | #include <media/v4l2-ioctl.h> | |
42 | ||
43 | #include "omap24xxcam.h" | |
44 | ||
45 | #define OMAP24XXCAM_VERSION KERNEL_VERSION(0, 0, 0) | |
46 | ||
47 | #define RESET_TIMEOUT_NS 10000 | |
48 | ||
49 | static void omap24xxcam_reset(struct omap24xxcam_device *cam); | |
50 | static int omap24xxcam_sensor_if_enable(struct omap24xxcam_device *cam); | |
51 | static void omap24xxcam_device_unregister(struct v4l2_int_device *s); | |
52 | static int omap24xxcam_remove(struct platform_device *pdev); | |
53 | ||
54 | /* module parameters */ | |
55 | static int video_nr = -1; /* video device minor (-1 ==> auto assign) */ | |
56 | /* | |
57 | * Maximum amount of memory to use for capture buffers. | |
58 | * Default is 4800KB, enough to double-buffer SXGA. | |
59 | */ | |
60 | static int capture_mem = 1280 * 960 * 2 * 2; | |
61 | ||
62 | static struct v4l2_int_device omap24xxcam; | |
63 | ||
64 | /* | |
65 | * | |
66 | * Clocks. | |
67 | * | |
68 | */ | |
69 | ||
70 | static void omap24xxcam_clock_put(struct omap24xxcam_device *cam) | |
71 | { | |
72 | if (cam->ick != NULL && !IS_ERR(cam->ick)) | |
73 | clk_put(cam->ick); | |
74 | if (cam->fck != NULL && !IS_ERR(cam->fck)) | |
75 | clk_put(cam->fck); | |
76 | ||
77 | cam->ick = cam->fck = NULL; | |
78 | } | |
79 | ||
80 | static int omap24xxcam_clock_get(struct omap24xxcam_device *cam) | |
81 | { | |
82 | int rval = 0; | |
83 | ||
6c5dbb40 | 84 | cam->fck = clk_get(cam->dev, "fck"); |
39aee69a | 85 | if (IS_ERR(cam->fck)) { |
6c5dbb40 | 86 | dev_err(cam->dev, "can't get camera fck"); |
39aee69a SA |
87 | rval = PTR_ERR(cam->fck); |
88 | omap24xxcam_clock_put(cam); | |
89 | return rval; | |
90 | } | |
91 | ||
6c5dbb40 | 92 | cam->ick = clk_get(cam->dev, "ick"); |
39aee69a | 93 | if (IS_ERR(cam->ick)) { |
6c5dbb40 | 94 | dev_err(cam->dev, "can't get camera ick"); |
39aee69a SA |
95 | rval = PTR_ERR(cam->ick); |
96 | omap24xxcam_clock_put(cam); | |
97 | } | |
98 | ||
99 | return rval; | |
100 | } | |
101 | ||
102 | static void omap24xxcam_clock_on(struct omap24xxcam_device *cam) | |
103 | { | |
104 | clk_enable(cam->fck); | |
105 | clk_enable(cam->ick); | |
106 | } | |
107 | ||
108 | static void omap24xxcam_clock_off(struct omap24xxcam_device *cam) | |
109 | { | |
110 | clk_disable(cam->fck); | |
111 | clk_disable(cam->ick); | |
112 | } | |
113 | ||
114 | /* | |
115 | * | |
116 | * Camera core | |
117 | * | |
118 | */ | |
119 | ||
120 | /* | |
121 | * Set xclk. | |
122 | * | |
123 | * To disable xclk, use value zero. | |
124 | */ | |
125 | static void omap24xxcam_core_xclk_set(const struct omap24xxcam_device *cam, | |
126 | u32 xclk) | |
127 | { | |
128 | if (xclk) { | |
129 | u32 divisor = CAM_MCLK / xclk; | |
130 | ||
131 | if (divisor == 1) | |
132 | omap24xxcam_reg_out(cam->mmio_base + CC_REG_OFFSET, | |
133 | CC_CTRL_XCLK, | |
134 | CC_CTRL_XCLK_DIV_BYPASS); | |
135 | else | |
136 | omap24xxcam_reg_out(cam->mmio_base + CC_REG_OFFSET, | |
137 | CC_CTRL_XCLK, divisor); | |
138 | } else | |
139 | omap24xxcam_reg_out(cam->mmio_base + CC_REG_OFFSET, | |
140 | CC_CTRL_XCLK, CC_CTRL_XCLK_DIV_STABLE_LOW); | |
141 | } | |
142 | ||
143 | static void omap24xxcam_core_hwinit(const struct omap24xxcam_device *cam) | |
144 | { | |
145 | /* | |
146 | * Setting the camera core AUTOIDLE bit causes problems with frame | |
147 | * synchronization, so we will clear the AUTOIDLE bit instead. | |
148 | */ | |
149 | omap24xxcam_reg_out(cam->mmio_base + CC_REG_OFFSET, CC_SYSCONFIG, | |
150 | CC_SYSCONFIG_AUTOIDLE); | |
151 | ||
152 | /* program the camera interface DMA packet size */ | |
153 | omap24xxcam_reg_out(cam->mmio_base + CC_REG_OFFSET, CC_CTRL_DMA, | |
154 | CC_CTRL_DMA_EN | (DMA_THRESHOLD / 4 - 1)); | |
155 | ||
156 | /* enable camera core error interrupts */ | |
157 | omap24xxcam_reg_out(cam->mmio_base + CC_REG_OFFSET, CC_IRQENABLE, | |
158 | CC_IRQENABLE_FW_ERR_IRQ | |
159 | | CC_IRQENABLE_FSC_ERR_IRQ | |
160 | | CC_IRQENABLE_SSC_ERR_IRQ | |
161 | | CC_IRQENABLE_FIFO_OF_IRQ); | |
162 | } | |
163 | ||
164 | /* | |
165 | * Enable the camera core. | |
166 | * | |
167 | * Data transfer to the camera DMA starts from next starting frame. | |
168 | */ | |
169 | static void omap24xxcam_core_enable(const struct omap24xxcam_device *cam) | |
170 | { | |
171 | ||
172 | omap24xxcam_reg_out(cam->mmio_base + CC_REG_OFFSET, CC_CTRL, | |
173 | cam->cc_ctrl); | |
174 | } | |
175 | ||
176 | /* | |
177 | * Disable camera core. | |
178 | * | |
179 | * The data transfer will be stopped immediately (CC_CTRL_CC_RST). The | |
180 | * core internal state machines will be reset. Use | |
181 | * CC_CTRL_CC_FRAME_TRIG instead if you want to transfer the current | |
182 | * frame completely. | |
183 | */ | |
184 | static void omap24xxcam_core_disable(const struct omap24xxcam_device *cam) | |
185 | { | |
186 | omap24xxcam_reg_out(cam->mmio_base + CC_REG_OFFSET, CC_CTRL, | |
187 | CC_CTRL_CC_RST); | |
188 | } | |
189 | ||
190 | /* Interrupt service routine for camera core interrupts. */ | |
191 | static void omap24xxcam_core_isr(struct omap24xxcam_device *cam) | |
192 | { | |
193 | u32 cc_irqstatus; | |
194 | const u32 cc_irqstatus_err = | |
195 | CC_IRQSTATUS_FW_ERR_IRQ | |
196 | | CC_IRQSTATUS_FSC_ERR_IRQ | |
197 | | CC_IRQSTATUS_SSC_ERR_IRQ | |
198 | | CC_IRQSTATUS_FIFO_UF_IRQ | |
199 | | CC_IRQSTATUS_FIFO_OF_IRQ; | |
200 | ||
201 | cc_irqstatus = omap24xxcam_reg_in(cam->mmio_base + CC_REG_OFFSET, | |
202 | CC_IRQSTATUS); | |
203 | omap24xxcam_reg_out(cam->mmio_base + CC_REG_OFFSET, CC_IRQSTATUS, | |
204 | cc_irqstatus); | |
205 | ||
206 | if (cc_irqstatus & cc_irqstatus_err | |
207 | && !atomic_read(&cam->in_reset)) { | |
208 | dev_dbg(cam->dev, "resetting camera, cc_irqstatus 0x%x\n", | |
209 | cc_irqstatus); | |
210 | omap24xxcam_reset(cam); | |
211 | } | |
212 | } | |
213 | ||
214 | /* | |
215 | * | |
216 | * videobuf_buffer handling. | |
217 | * | |
218 | * Memory for mmapped videobuf_buffers is not allocated | |
219 | * conventionally, but by several kmalloc allocations and then | |
220 | * creating the scatterlist on our own. User-space buffers are handled | |
221 | * normally. | |
222 | * | |
223 | */ | |
224 | ||
225 | /* | |
226 | * Free the memory-mapped buffer memory allocated for a | |
227 | * videobuf_buffer and the associated scatterlist. | |
228 | */ | |
229 | static void omap24xxcam_vbq_free_mmap_buffer(struct videobuf_buffer *vb) | |
230 | { | |
231 | struct videobuf_dmabuf *dma = videobuf_to_dma(vb); | |
232 | size_t alloc_size; | |
233 | struct page *page; | |
234 | int i; | |
235 | ||
236 | if (dma->sglist == NULL) | |
237 | return; | |
238 | ||
239 | i = dma->sglen; | |
240 | while (i) { | |
241 | i--; | |
242 | alloc_size = sg_dma_len(&dma->sglist[i]); | |
243 | page = sg_page(&dma->sglist[i]); | |
244 | do { | |
245 | ClearPageReserved(page++); | |
246 | } while (alloc_size -= PAGE_SIZE); | |
247 | __free_pages(sg_page(&dma->sglist[i]), | |
248 | get_order(sg_dma_len(&dma->sglist[i]))); | |
249 | } | |
250 | ||
251 | kfree(dma->sglist); | |
252 | dma->sglist = NULL; | |
253 | } | |
254 | ||
255 | /* Release all memory related to the videobuf_queue. */ | |
256 | static void omap24xxcam_vbq_free_mmap_buffers(struct videobuf_queue *vbq) | |
257 | { | |
258 | int i; | |
259 | ||
260 | mutex_lock(&vbq->vb_lock); | |
261 | ||
262 | for (i = 0; i < VIDEO_MAX_FRAME; i++) { | |
263 | if (NULL == vbq->bufs[i]) | |
264 | continue; | |
265 | if (V4L2_MEMORY_MMAP != vbq->bufs[i]->memory) | |
266 | continue; | |
267 | vbq->ops->buf_release(vbq, vbq->bufs[i]); | |
268 | omap24xxcam_vbq_free_mmap_buffer(vbq->bufs[i]); | |
269 | kfree(vbq->bufs[i]); | |
270 | vbq->bufs[i] = NULL; | |
271 | } | |
272 | ||
273 | mutex_unlock(&vbq->vb_lock); | |
274 | ||
275 | videobuf_mmap_free(vbq); | |
276 | } | |
277 | ||
278 | /* | |
279 | * Allocate physically as contiguous as possible buffer for video | |
280 | * frame and allocate and build DMA scatter-gather list for it. | |
281 | */ | |
282 | static int omap24xxcam_vbq_alloc_mmap_buffer(struct videobuf_buffer *vb) | |
283 | { | |
284 | unsigned int order; | |
285 | size_t alloc_size, size = vb->bsize; /* vb->bsize is page aligned */ | |
286 | struct page *page; | |
287 | int max_pages, err = 0, i = 0; | |
288 | struct videobuf_dmabuf *dma = videobuf_to_dma(vb); | |
289 | ||
290 | /* | |
291 | * allocate maximum size scatter-gather list. Note this is | |
292 | * overhead. We may not use as many entries as we allocate | |
293 | */ | |
294 | max_pages = vb->bsize >> PAGE_SHIFT; | |
295 | dma->sglist = kcalloc(max_pages, sizeof(*dma->sglist), GFP_KERNEL); | |
296 | if (dma->sglist == NULL) { | |
297 | err = -ENOMEM; | |
298 | goto out; | |
299 | } | |
300 | ||
301 | while (size) { | |
302 | order = get_order(size); | |
303 | /* | |
304 | * do not over-allocate even if we would get larger | |
305 | * contiguous chunk that way | |
306 | */ | |
307 | if ((PAGE_SIZE << order) > size) | |
308 | order--; | |
309 | ||
310 | /* try to allocate as many contiguous pages as possible */ | |
311 | page = alloc_pages(GFP_KERNEL | GFP_DMA, order); | |
312 | /* if allocation fails, try to allocate smaller amount */ | |
313 | while (page == NULL) { | |
314 | order--; | |
315 | page = alloc_pages(GFP_KERNEL | GFP_DMA, order); | |
316 | if (page == NULL && !order) { | |
317 | err = -ENOMEM; | |
318 | goto out; | |
319 | } | |
320 | } | |
321 | size -= (PAGE_SIZE << order); | |
322 | ||
323 | /* append allocated chunk of pages into scatter-gather list */ | |
324 | sg_set_page(&dma->sglist[i], page, PAGE_SIZE << order, 0); | |
325 | dma->sglen++; | |
326 | i++; | |
327 | ||
328 | alloc_size = (PAGE_SIZE << order); | |
329 | ||
330 | /* clear pages before giving them to user space */ | |
331 | memset(page_address(page), 0, alloc_size); | |
332 | ||
333 | /* mark allocated pages reserved */ | |
334 | do { | |
335 | SetPageReserved(page++); | |
336 | } while (alloc_size -= PAGE_SIZE); | |
337 | } | |
338 | /* | |
339 | * REVISIT: not fully correct to assign nr_pages == sglen but | |
340 | * video-buf is passing nr_pages for e.g. unmap_sg calls | |
341 | */ | |
342 | dma->nr_pages = dma->sglen; | |
343 | dma->direction = PCI_DMA_FROMDEVICE; | |
344 | ||
345 | return 0; | |
346 | ||
347 | out: | |
348 | omap24xxcam_vbq_free_mmap_buffer(vb); | |
349 | return err; | |
350 | } | |
351 | ||
352 | static int omap24xxcam_vbq_alloc_mmap_buffers(struct videobuf_queue *vbq, | |
353 | unsigned int count) | |
354 | { | |
355 | int i, err = 0; | |
356 | struct omap24xxcam_fh *fh = | |
357 | container_of(vbq, struct omap24xxcam_fh, vbq); | |
358 | ||
359 | mutex_lock(&vbq->vb_lock); | |
360 | ||
361 | for (i = 0; i < count; i++) { | |
362 | err = omap24xxcam_vbq_alloc_mmap_buffer(vbq->bufs[i]); | |
363 | if (err) | |
364 | goto out; | |
365 | dev_dbg(fh->cam->dev, "sglen is %d for buffer %d\n", | |
366 | videobuf_to_dma(vbq->bufs[i])->sglen, i); | |
367 | } | |
368 | ||
369 | mutex_unlock(&vbq->vb_lock); | |
370 | ||
371 | return 0; | |
372 | out: | |
373 | while (i) { | |
374 | i--; | |
375 | omap24xxcam_vbq_free_mmap_buffer(vbq->bufs[i]); | |
376 | } | |
377 | ||
378 | mutex_unlock(&vbq->vb_lock); | |
379 | ||
380 | return err; | |
381 | } | |
382 | ||
383 | /* | |
384 | * This routine is called from interrupt context when a scatter-gather DMA | |
385 | * transfer of a videobuf_buffer completes. | |
386 | */ | |
387 | static void omap24xxcam_vbq_complete(struct omap24xxcam_sgdma *sgdma, | |
388 | u32 csr, void *arg) | |
389 | { | |
390 | struct omap24xxcam_device *cam = | |
391 | container_of(sgdma, struct omap24xxcam_device, sgdma); | |
392 | struct omap24xxcam_fh *fh = cam->streaming->private_data; | |
393 | struct videobuf_buffer *vb = (struct videobuf_buffer *)arg; | |
394 | const u32 csr_error = CAMDMA_CSR_MISALIGNED_ERR | |
395 | | CAMDMA_CSR_SUPERVISOR_ERR | CAMDMA_CSR_SECURE_ERR | |
396 | | CAMDMA_CSR_TRANS_ERR | CAMDMA_CSR_DROP; | |
397 | unsigned long flags; | |
398 | ||
399 | spin_lock_irqsave(&cam->core_enable_disable_lock, flags); | |
400 | if (--cam->sgdma_in_queue == 0) | |
401 | omap24xxcam_core_disable(cam); | |
402 | spin_unlock_irqrestore(&cam->core_enable_disable_lock, flags); | |
403 | ||
404 | do_gettimeofday(&vb->ts); | |
405 | vb->field_count = atomic_add_return(2, &fh->field_count); | |
406 | if (csr & csr_error) { | |
407 | vb->state = VIDEOBUF_ERROR; | |
408 | if (!atomic_read(&fh->cam->in_reset)) { | |
409 | dev_dbg(cam->dev, "resetting camera, csr 0x%x\n", csr); | |
410 | omap24xxcam_reset(cam); | |
411 | } | |
412 | } else | |
413 | vb->state = VIDEOBUF_DONE; | |
414 | wake_up(&vb->done); | |
415 | } | |
416 | ||
417 | static void omap24xxcam_vbq_release(struct videobuf_queue *vbq, | |
418 | struct videobuf_buffer *vb) | |
419 | { | |
420 | struct videobuf_dmabuf *dma = videobuf_to_dma(vb); | |
421 | ||
422 | /* wait for buffer, especially to get out of the sgdma queue */ | |
423 | videobuf_waiton(vb, 0, 0); | |
424 | if (vb->memory == V4L2_MEMORY_MMAP) { | |
425 | dma_unmap_sg(vbq->dev, dma->sglist, dma->sglen, | |
426 | dma->direction); | |
427 | dma->direction = DMA_NONE; | |
428 | } else { | |
429 | videobuf_dma_unmap(vbq, videobuf_to_dma(vb)); | |
430 | videobuf_dma_free(videobuf_to_dma(vb)); | |
431 | } | |
432 | ||
433 | vb->state = VIDEOBUF_NEEDS_INIT; | |
434 | } | |
435 | ||
436 | /* | |
437 | * Limit the number of available kernel image capture buffers based on the | |
438 | * number requested, the currently selected image size, and the maximum | |
439 | * amount of memory permitted for kernel capture buffers. | |
440 | */ | |
441 | static int omap24xxcam_vbq_setup(struct videobuf_queue *vbq, unsigned int *cnt, | |
442 | unsigned int *size) | |
443 | { | |
444 | struct omap24xxcam_fh *fh = vbq->priv_data; | |
445 | ||
446 | if (*cnt <= 0) | |
447 | *cnt = VIDEO_MAX_FRAME; /* supply a default number of buffers */ | |
448 | ||
449 | if (*cnt > VIDEO_MAX_FRAME) | |
450 | *cnt = VIDEO_MAX_FRAME; | |
451 | ||
452 | *size = fh->pix.sizeimage; | |
453 | ||
454 | /* accessing fh->cam->capture_mem is ok, it's constant */ | |
455 | while (*size * *cnt > fh->cam->capture_mem) | |
456 | (*cnt)--; | |
457 | ||
458 | return 0; | |
459 | } | |
460 | ||
461 | static int omap24xxcam_dma_iolock(struct videobuf_queue *vbq, | |
462 | struct videobuf_dmabuf *dma) | |
463 | { | |
464 | int err = 0; | |
465 | ||
466 | dma->direction = PCI_DMA_FROMDEVICE; | |
467 | if (!dma_map_sg(vbq->dev, dma->sglist, dma->sglen, dma->direction)) { | |
468 | kfree(dma->sglist); | |
469 | dma->sglist = NULL; | |
470 | dma->sglen = 0; | |
471 | err = -EIO; | |
472 | } | |
473 | ||
474 | return err; | |
475 | } | |
476 | ||
477 | static int omap24xxcam_vbq_prepare(struct videobuf_queue *vbq, | |
478 | struct videobuf_buffer *vb, | |
479 | enum v4l2_field field) | |
480 | { | |
481 | struct omap24xxcam_fh *fh = vbq->priv_data; | |
482 | int err = 0; | |
483 | ||
484 | /* | |
485 | * Accessing pix here is okay since it's constant while | |
486 | * streaming is on (and we only get called then). | |
487 | */ | |
488 | if (vb->baddr) { | |
489 | /* This is a userspace buffer. */ | |
490 | if (fh->pix.sizeimage > vb->bsize) { | |
491 | /* The buffer isn't big enough. */ | |
492 | err = -EINVAL; | |
493 | } else | |
494 | vb->size = fh->pix.sizeimage; | |
495 | } else { | |
496 | if (vb->state != VIDEOBUF_NEEDS_INIT) { | |
497 | /* | |
498 | * We have a kernel bounce buffer that has | |
499 | * already been allocated. | |
500 | */ | |
501 | if (fh->pix.sizeimage > vb->size) { | |
502 | /* | |
503 | * The image size has been changed to | |
504 | * a larger size since this buffer was | |
505 | * allocated, so we need to free and | |
506 | * reallocate it. | |
507 | */ | |
508 | omap24xxcam_vbq_release(vbq, vb); | |
509 | vb->size = fh->pix.sizeimage; | |
510 | } | |
511 | } else { | |
512 | /* We need to allocate a new kernel bounce buffer. */ | |
513 | vb->size = fh->pix.sizeimage; | |
514 | } | |
515 | } | |
516 | ||
517 | if (err) | |
518 | return err; | |
519 | ||
520 | vb->width = fh->pix.width; | |
521 | vb->height = fh->pix.height; | |
522 | vb->field = field; | |
523 | ||
524 | if (vb->state == VIDEOBUF_NEEDS_INIT) { | |
525 | if (vb->memory == V4L2_MEMORY_MMAP) | |
526 | /* | |
527 | * we have built the scatter-gather list by ourself so | |
528 | * do the scatter-gather mapping as well | |
529 | */ | |
530 | err = omap24xxcam_dma_iolock(vbq, videobuf_to_dma(vb)); | |
531 | else | |
532 | err = videobuf_iolock(vbq, vb, NULL); | |
533 | } | |
534 | ||
535 | if (!err) | |
536 | vb->state = VIDEOBUF_PREPARED; | |
537 | else | |
538 | omap24xxcam_vbq_release(vbq, vb); | |
539 | ||
540 | return err; | |
541 | } | |
542 | ||
543 | static void omap24xxcam_vbq_queue(struct videobuf_queue *vbq, | |
544 | struct videobuf_buffer *vb) | |
545 | { | |
546 | struct omap24xxcam_fh *fh = vbq->priv_data; | |
547 | struct omap24xxcam_device *cam = fh->cam; | |
548 | enum videobuf_state state = vb->state; | |
549 | unsigned long flags; | |
550 | int err; | |
551 | ||
552 | /* | |
553 | * FIXME: We're marking the buffer active since we have no | |
554 | * pretty way of marking it active exactly when the | |
555 | * scatter-gather transfer starts. | |
556 | */ | |
557 | vb->state = VIDEOBUF_ACTIVE; | |
558 | ||
559 | err = omap24xxcam_sgdma_queue(&fh->cam->sgdma, | |
560 | videobuf_to_dma(vb)->sglist, | |
561 | videobuf_to_dma(vb)->sglen, vb->size, | |
562 | omap24xxcam_vbq_complete, vb); | |
563 | ||
564 | if (!err) { | |
565 | spin_lock_irqsave(&cam->core_enable_disable_lock, flags); | |
566 | if (++cam->sgdma_in_queue == 1 | |
567 | && !atomic_read(&cam->in_reset)) | |
568 | omap24xxcam_core_enable(cam); | |
569 | spin_unlock_irqrestore(&cam->core_enable_disable_lock, flags); | |
570 | } else { | |
571 | /* | |
572 | * Oops. We're not supposed to get any errors here. | |
573 | * The only way we could get an error is if we ran out | |
574 | * of scatter-gather DMA slots, but we are supposed to | |
575 | * have at least as many scatter-gather DMA slots as | |
576 | * video buffers so that can't happen. | |
577 | */ | |
578 | dev_err(cam->dev, "failed to queue a video buffer for dma!\n"); | |
579 | dev_err(cam->dev, "likely a bug in the driver!\n"); | |
580 | vb->state = state; | |
581 | } | |
582 | } | |
583 | ||
584 | static struct videobuf_queue_ops omap24xxcam_vbq_ops = { | |
585 | .buf_setup = omap24xxcam_vbq_setup, | |
586 | .buf_prepare = omap24xxcam_vbq_prepare, | |
587 | .buf_queue = omap24xxcam_vbq_queue, | |
588 | .buf_release = omap24xxcam_vbq_release, | |
589 | }; | |
590 | ||
591 | /* | |
592 | * | |
593 | * OMAP main camera system | |
594 | * | |
595 | */ | |
596 | ||
597 | /* | |
598 | * Reset camera block to power-on state. | |
599 | */ | |
600 | static void omap24xxcam_poweron_reset(struct omap24xxcam_device *cam) | |
601 | { | |
602 | int max_loop = RESET_TIMEOUT_NS; | |
603 | ||
604 | /* Reset whole camera subsystem */ | |
605 | omap24xxcam_reg_out(cam->mmio_base, | |
606 | CAM_SYSCONFIG, | |
607 | CAM_SYSCONFIG_SOFTRESET); | |
608 | ||
609 | /* Wait till it's finished */ | |
610 | while (!(omap24xxcam_reg_in(cam->mmio_base, CAM_SYSSTATUS) | |
611 | & CAM_SYSSTATUS_RESETDONE) | |
612 | && --max_loop) { | |
613 | ndelay(1); | |
614 | } | |
615 | ||
616 | if (!(omap24xxcam_reg_in(cam->mmio_base, CAM_SYSSTATUS) | |
617 | & CAM_SYSSTATUS_RESETDONE)) | |
618 | dev_err(cam->dev, "camera soft reset timeout\n"); | |
619 | } | |
620 | ||
621 | /* | |
622 | * (Re)initialise the camera block. | |
623 | */ | |
624 | static void omap24xxcam_hwinit(struct omap24xxcam_device *cam) | |
625 | { | |
626 | omap24xxcam_poweron_reset(cam); | |
627 | ||
628 | /* set the camera subsystem autoidle bit */ | |
629 | omap24xxcam_reg_out(cam->mmio_base, CAM_SYSCONFIG, | |
630 | CAM_SYSCONFIG_AUTOIDLE); | |
631 | ||
632 | /* set the camera MMU autoidle bit */ | |
633 | omap24xxcam_reg_out(cam->mmio_base, | |
634 | CAMMMU_REG_OFFSET + CAMMMU_SYSCONFIG, | |
635 | CAMMMU_SYSCONFIG_AUTOIDLE); | |
636 | ||
637 | omap24xxcam_core_hwinit(cam); | |
638 | ||
639 | omap24xxcam_dma_hwinit(&cam->sgdma.dma); | |
640 | } | |
641 | ||
642 | /* | |
643 | * Callback for dma transfer stalling. | |
644 | */ | |
645 | static void omap24xxcam_stalled_dma_reset(unsigned long data) | |
646 | { | |
647 | struct omap24xxcam_device *cam = (struct omap24xxcam_device *)data; | |
648 | ||
649 | if (!atomic_read(&cam->in_reset)) { | |
650 | dev_dbg(cam->dev, "dma stalled, resetting camera\n"); | |
651 | omap24xxcam_reset(cam); | |
652 | } | |
653 | } | |
654 | ||
655 | /* | |
656 | * Stop capture. Mark we're doing a reset, stop DMA transfers and | |
657 | * core. (No new scatter-gather transfers will be queued whilst | |
658 | * in_reset is non-zero.) | |
659 | * | |
660 | * If omap24xxcam_capture_stop is called from several places at | |
661 | * once, only the first call will have an effect. Similarly, the last | |
662 | * call omap24xxcam_streaming_cont will have effect. | |
663 | * | |
664 | * Serialisation is ensured by using cam->core_enable_disable_lock. | |
665 | */ | |
666 | static void omap24xxcam_capture_stop(struct omap24xxcam_device *cam) | |
667 | { | |
668 | unsigned long flags; | |
669 | ||
670 | spin_lock_irqsave(&cam->core_enable_disable_lock, flags); | |
671 | ||
672 | if (atomic_inc_return(&cam->in_reset) != 1) { | |
673 | spin_unlock_irqrestore(&cam->core_enable_disable_lock, flags); | |
674 | return; | |
675 | } | |
676 | ||
677 | omap24xxcam_core_disable(cam); | |
678 | ||
679 | spin_unlock_irqrestore(&cam->core_enable_disable_lock, flags); | |
680 | ||
681 | omap24xxcam_sgdma_sync(&cam->sgdma); | |
682 | } | |
683 | ||
684 | /* | |
685 | * Reset and continue streaming. | |
686 | * | |
687 | * Note: Resetting the camera FIFO via the CC_RST bit in the CC_CTRL | |
688 | * register is supposed to be sufficient to recover from a camera | |
689 | * interface error, but it doesn't seem to be enough. If we only do | |
690 | * that then subsequent image captures are out of sync by either one | |
691 | * or two times DMA_THRESHOLD bytes. Resetting and re-initializing the | |
692 | * entire camera subsystem prevents the problem with frame | |
693 | * synchronization. | |
694 | */ | |
695 | static void omap24xxcam_capture_cont(struct omap24xxcam_device *cam) | |
696 | { | |
697 | unsigned long flags; | |
698 | ||
699 | spin_lock_irqsave(&cam->core_enable_disable_lock, flags); | |
700 | ||
701 | if (atomic_read(&cam->in_reset) != 1) | |
702 | goto out; | |
703 | ||
704 | omap24xxcam_hwinit(cam); | |
705 | ||
706 | omap24xxcam_sensor_if_enable(cam); | |
707 | ||
708 | omap24xxcam_sgdma_process(&cam->sgdma); | |
709 | ||
710 | if (cam->sgdma_in_queue) | |
711 | omap24xxcam_core_enable(cam); | |
712 | ||
713 | out: | |
714 | atomic_dec(&cam->in_reset); | |
715 | spin_unlock_irqrestore(&cam->core_enable_disable_lock, flags); | |
716 | } | |
717 | ||
718 | static ssize_t | |
719 | omap24xxcam_streaming_show(struct device *dev, struct device_attribute *attr, | |
720 | char *buf) | |
721 | { | |
722 | struct omap24xxcam_device *cam = dev_get_drvdata(dev); | |
723 | ||
724 | return sprintf(buf, "%s\n", cam->streaming ? "active" : "inactive"); | |
725 | } | |
726 | static DEVICE_ATTR(streaming, S_IRUGO, omap24xxcam_streaming_show, NULL); | |
727 | ||
728 | /* | |
729 | * Stop capture and restart it. I.e. reset the camera during use. | |
730 | */ | |
731 | static void omap24xxcam_reset(struct omap24xxcam_device *cam) | |
732 | { | |
733 | omap24xxcam_capture_stop(cam); | |
734 | omap24xxcam_capture_cont(cam); | |
735 | } | |
736 | ||
737 | /* | |
738 | * The main interrupt handler. | |
739 | */ | |
740 | static irqreturn_t omap24xxcam_isr(int irq, void *arg) | |
741 | { | |
742 | struct omap24xxcam_device *cam = (struct omap24xxcam_device *)arg; | |
743 | u32 irqstatus; | |
744 | unsigned int irqhandled = 0; | |
745 | ||
746 | irqstatus = omap24xxcam_reg_in(cam->mmio_base, CAM_IRQSTATUS); | |
747 | ||
748 | if (irqstatus & | |
749 | (CAM_IRQSTATUS_DMA_IRQ2 | CAM_IRQSTATUS_DMA_IRQ1 | |
750 | | CAM_IRQSTATUS_DMA_IRQ0)) { | |
751 | omap24xxcam_dma_isr(&cam->sgdma.dma); | |
752 | irqhandled = 1; | |
753 | } | |
754 | if (irqstatus & CAM_IRQSTATUS_CC_IRQ) { | |
755 | omap24xxcam_core_isr(cam); | |
756 | irqhandled = 1; | |
757 | } | |
758 | if (irqstatus & CAM_IRQSTATUS_MMU_IRQ) | |
759 | dev_err(cam->dev, "unhandled camera MMU interrupt!\n"); | |
760 | ||
761 | return IRQ_RETVAL(irqhandled); | |
762 | } | |
763 | ||
764 | /* | |
765 | * | |
766 | * Sensor handling. | |
767 | * | |
768 | */ | |
769 | ||
770 | /* | |
771 | * Enable the external sensor interface. Try to negotiate interface | |
772 | * parameters with the sensor and start using the new ones. The calls | |
773 | * to sensor_if_enable and sensor_if_disable need not to be balanced. | |
774 | */ | |
775 | static int omap24xxcam_sensor_if_enable(struct omap24xxcam_device *cam) | |
776 | { | |
777 | int rval; | |
778 | struct v4l2_ifparm p; | |
779 | ||
780 | rval = vidioc_int_g_ifparm(cam->sdev, &p); | |
781 | if (rval) { | |
782 | dev_err(cam->dev, "vidioc_int_g_ifparm failed with %d\n", rval); | |
783 | return rval; | |
784 | } | |
785 | ||
786 | cam->if_type = p.if_type; | |
787 | ||
788 | cam->cc_ctrl = CC_CTRL_CC_EN; | |
789 | ||
790 | switch (p.if_type) { | |
791 | case V4L2_IF_TYPE_BT656: | |
792 | if (p.u.bt656.frame_start_on_rising_vs) | |
793 | cam->cc_ctrl |= CC_CTRL_NOBT_SYNCHRO; | |
794 | if (p.u.bt656.bt_sync_correct) | |
795 | cam->cc_ctrl |= CC_CTRL_BT_CORRECT; | |
796 | if (p.u.bt656.swap) | |
797 | cam->cc_ctrl |= CC_CTRL_PAR_ORDERCAM; | |
798 | if (p.u.bt656.latch_clk_inv) | |
799 | cam->cc_ctrl |= CC_CTRL_PAR_CLK_POL; | |
800 | if (p.u.bt656.nobt_hs_inv) | |
801 | cam->cc_ctrl |= CC_CTRL_NOBT_HS_POL; | |
802 | if (p.u.bt656.nobt_vs_inv) | |
803 | cam->cc_ctrl |= CC_CTRL_NOBT_VS_POL; | |
804 | ||
805 | switch (p.u.bt656.mode) { | |
806 | case V4L2_IF_TYPE_BT656_MODE_NOBT_8BIT: | |
807 | cam->cc_ctrl |= CC_CTRL_PAR_MODE_NOBT8; | |
808 | break; | |
809 | case V4L2_IF_TYPE_BT656_MODE_NOBT_10BIT: | |
810 | cam->cc_ctrl |= CC_CTRL_PAR_MODE_NOBT10; | |
811 | break; | |
812 | case V4L2_IF_TYPE_BT656_MODE_NOBT_12BIT: | |
813 | cam->cc_ctrl |= CC_CTRL_PAR_MODE_NOBT12; | |
814 | break; | |
815 | case V4L2_IF_TYPE_BT656_MODE_BT_8BIT: | |
816 | cam->cc_ctrl |= CC_CTRL_PAR_MODE_BT8; | |
817 | break; | |
818 | case V4L2_IF_TYPE_BT656_MODE_BT_10BIT: | |
819 | cam->cc_ctrl |= CC_CTRL_PAR_MODE_BT10; | |
820 | break; | |
821 | default: | |
822 | dev_err(cam->dev, | |
823 | "bt656 interface mode %d not supported\n", | |
824 | p.u.bt656.mode); | |
825 | return -EINVAL; | |
826 | } | |
827 | /* | |
828 | * The clock rate that the sensor wants has changed. | |
829 | * We have to adjust the xclk from OMAP 2 side to | |
830 | * match the sensor's wish as closely as possible. | |
831 | */ | |
832 | if (p.u.bt656.clock_curr != cam->if_u.bt656.xclk) { | |
833 | u32 xclk = p.u.bt656.clock_curr; | |
834 | u32 divisor; | |
835 | ||
836 | if (xclk == 0) | |
837 | return -EINVAL; | |
838 | ||
839 | if (xclk > CAM_MCLK) | |
840 | xclk = CAM_MCLK; | |
841 | ||
842 | divisor = CAM_MCLK / xclk; | |
843 | if (divisor * xclk < CAM_MCLK) | |
844 | divisor++; | |
845 | if (CAM_MCLK / divisor < p.u.bt656.clock_min | |
846 | && divisor > 1) | |
847 | divisor--; | |
848 | if (divisor > 30) | |
849 | divisor = 30; | |
850 | ||
851 | xclk = CAM_MCLK / divisor; | |
852 | ||
853 | if (xclk < p.u.bt656.clock_min | |
854 | || xclk > p.u.bt656.clock_max) | |
855 | return -EINVAL; | |
856 | ||
857 | cam->if_u.bt656.xclk = xclk; | |
858 | } | |
859 | omap24xxcam_core_xclk_set(cam, cam->if_u.bt656.xclk); | |
860 | break; | |
861 | default: | |
862 | /* FIXME: how about other interfaces? */ | |
863 | dev_err(cam->dev, "interface type %d not supported\n", | |
864 | p.if_type); | |
865 | return -EINVAL; | |
866 | } | |
867 | ||
868 | return 0; | |
869 | } | |
870 | ||
871 | static void omap24xxcam_sensor_if_disable(const struct omap24xxcam_device *cam) | |
872 | { | |
873 | switch (cam->if_type) { | |
874 | case V4L2_IF_TYPE_BT656: | |
875 | omap24xxcam_core_xclk_set(cam, 0); | |
876 | break; | |
877 | } | |
878 | } | |
879 | ||
880 | /* | |
881 | * Initialise the sensor hardware. | |
882 | */ | |
883 | static int omap24xxcam_sensor_init(struct omap24xxcam_device *cam) | |
884 | { | |
885 | int err = 0; | |
886 | struct v4l2_int_device *sdev = cam->sdev; | |
887 | ||
888 | omap24xxcam_clock_on(cam); | |
889 | err = omap24xxcam_sensor_if_enable(cam); | |
890 | if (err) { | |
891 | dev_err(cam->dev, "sensor interface could not be enabled at " | |
892 | "initialisation, %d\n", err); | |
893 | cam->sdev = NULL; | |
894 | goto out; | |
895 | } | |
896 | ||
897 | /* power up sensor during sensor initialization */ | |
898 | vidioc_int_s_power(sdev, 1); | |
899 | ||
900 | err = vidioc_int_dev_init(sdev); | |
901 | if (err) { | |
902 | dev_err(cam->dev, "cannot initialize sensor, error %d\n", err); | |
903 | /* Sensor init failed --- it's nonexistent to us! */ | |
904 | cam->sdev = NULL; | |
905 | goto out; | |
906 | } | |
907 | ||
908 | dev_info(cam->dev, "sensor is %s\n", sdev->name); | |
909 | ||
910 | out: | |
911 | omap24xxcam_sensor_if_disable(cam); | |
912 | omap24xxcam_clock_off(cam); | |
913 | ||
914 | vidioc_int_s_power(sdev, 0); | |
915 | ||
916 | return err; | |
917 | } | |
918 | ||
919 | static void omap24xxcam_sensor_exit(struct omap24xxcam_device *cam) | |
920 | { | |
921 | if (cam->sdev) | |
922 | vidioc_int_dev_exit(cam->sdev); | |
923 | } | |
924 | ||
925 | static void omap24xxcam_sensor_disable(struct omap24xxcam_device *cam) | |
926 | { | |
927 | omap24xxcam_sensor_if_disable(cam); | |
928 | omap24xxcam_clock_off(cam); | |
929 | vidioc_int_s_power(cam->sdev, 0); | |
930 | } | |
931 | ||
932 | /* | |
933 | * Power-up and configure camera sensor. It's ready for capturing now. | |
934 | */ | |
935 | static int omap24xxcam_sensor_enable(struct omap24xxcam_device *cam) | |
936 | { | |
937 | int rval; | |
938 | ||
939 | omap24xxcam_clock_on(cam); | |
940 | ||
941 | omap24xxcam_sensor_if_enable(cam); | |
942 | ||
943 | rval = vidioc_int_s_power(cam->sdev, 1); | |
944 | if (rval) | |
945 | goto out; | |
946 | ||
947 | rval = vidioc_int_init(cam->sdev); | |
948 | if (rval) | |
949 | goto out; | |
950 | ||
951 | return 0; | |
952 | ||
953 | out: | |
954 | omap24xxcam_sensor_disable(cam); | |
955 | ||
956 | return rval; | |
957 | } | |
958 | ||
959 | static void omap24xxcam_sensor_reset_work(struct work_struct *work) | |
960 | { | |
961 | struct omap24xxcam_device *cam = | |
962 | container_of(work, struct omap24xxcam_device, | |
963 | sensor_reset_work); | |
964 | ||
965 | if (atomic_read(&cam->reset_disable)) | |
966 | return; | |
967 | ||
968 | omap24xxcam_capture_stop(cam); | |
969 | ||
970 | if (vidioc_int_reset(cam->sdev) == 0) { | |
971 | vidioc_int_init(cam->sdev); | |
972 | } else { | |
973 | /* Can't reset it by vidioc_int_reset. */ | |
974 | omap24xxcam_sensor_disable(cam); | |
975 | omap24xxcam_sensor_enable(cam); | |
976 | } | |
977 | ||
978 | omap24xxcam_capture_cont(cam); | |
979 | } | |
980 | ||
981 | /* | |
982 | * | |
983 | * IOCTL interface. | |
984 | * | |
985 | */ | |
986 | ||
987 | static int vidioc_querycap(struct file *file, void *fh, | |
988 | struct v4l2_capability *cap) | |
989 | { | |
990 | struct omap24xxcam_fh *ofh = fh; | |
991 | struct omap24xxcam_device *cam = ofh->cam; | |
992 | ||
993 | strlcpy(cap->driver, CAM_NAME, sizeof(cap->driver)); | |
994 | strlcpy(cap->card, cam->vfd->name, sizeof(cap->card)); | |
995 | cap->version = OMAP24XXCAM_VERSION; | |
996 | cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; | |
997 | ||
998 | return 0; | |
999 | } | |
1000 | ||
1001 | static int vidioc_enum_fmt_vid_cap(struct file *file, void *fh, | |
1002 | struct v4l2_fmtdesc *f) | |
1003 | { | |
1004 | struct omap24xxcam_fh *ofh = fh; | |
1005 | struct omap24xxcam_device *cam = ofh->cam; | |
1006 | int rval; | |
1007 | ||
1008 | rval = vidioc_int_enum_fmt_cap(cam->sdev, f); | |
1009 | ||
1010 | return rval; | |
1011 | } | |
1012 | ||
1013 | static int vidioc_g_fmt_vid_cap(struct file *file, void *fh, | |
1014 | struct v4l2_format *f) | |
1015 | { | |
1016 | struct omap24xxcam_fh *ofh = fh; | |
1017 | struct omap24xxcam_device *cam = ofh->cam; | |
1018 | int rval; | |
1019 | ||
1020 | mutex_lock(&cam->mutex); | |
1021 | rval = vidioc_int_g_fmt_cap(cam->sdev, f); | |
1022 | mutex_unlock(&cam->mutex); | |
1023 | ||
1024 | return rval; | |
1025 | } | |
1026 | ||
1027 | static int vidioc_s_fmt_vid_cap(struct file *file, void *fh, | |
1028 | struct v4l2_format *f) | |
1029 | { | |
1030 | struct omap24xxcam_fh *ofh = fh; | |
1031 | struct omap24xxcam_device *cam = ofh->cam; | |
1032 | int rval; | |
1033 | ||
1034 | mutex_lock(&cam->mutex); | |
1035 | if (cam->streaming) { | |
1036 | rval = -EBUSY; | |
1037 | goto out; | |
1038 | } | |
1039 | ||
1040 | rval = vidioc_int_s_fmt_cap(cam->sdev, f); | |
1041 | ||
1042 | out: | |
1043 | mutex_unlock(&cam->mutex); | |
1044 | ||
1045 | if (!rval) { | |
1046 | mutex_lock(&ofh->vbq.vb_lock); | |
1047 | ofh->pix = f->fmt.pix; | |
1048 | mutex_unlock(&ofh->vbq.vb_lock); | |
1049 | } | |
1050 | ||
1051 | memset(f, 0, sizeof(*f)); | |
1052 | vidioc_g_fmt_vid_cap(file, fh, f); | |
1053 | ||
1054 | return rval; | |
1055 | } | |
1056 | ||
1057 | static int vidioc_try_fmt_vid_cap(struct file *file, void *fh, | |
1058 | struct v4l2_format *f) | |
1059 | { | |
1060 | struct omap24xxcam_fh *ofh = fh; | |
1061 | struct omap24xxcam_device *cam = ofh->cam; | |
1062 | int rval; | |
1063 | ||
1064 | mutex_lock(&cam->mutex); | |
1065 | rval = vidioc_int_try_fmt_cap(cam->sdev, f); | |
1066 | mutex_unlock(&cam->mutex); | |
1067 | ||
1068 | return rval; | |
1069 | } | |
1070 | ||
1071 | static int vidioc_reqbufs(struct file *file, void *fh, | |
1072 | struct v4l2_requestbuffers *b) | |
1073 | { | |
1074 | struct omap24xxcam_fh *ofh = fh; | |
1075 | struct omap24xxcam_device *cam = ofh->cam; | |
1076 | int rval; | |
1077 | ||
1078 | mutex_lock(&cam->mutex); | |
1079 | if (cam->streaming) { | |
1080 | mutex_unlock(&cam->mutex); | |
1081 | return -EBUSY; | |
1082 | } | |
1083 | ||
1084 | omap24xxcam_vbq_free_mmap_buffers(&ofh->vbq); | |
1085 | mutex_unlock(&cam->mutex); | |
1086 | ||
1087 | rval = videobuf_reqbufs(&ofh->vbq, b); | |
1088 | ||
1089 | /* | |
1090 | * Either videobuf_reqbufs failed or the buffers are not | |
1091 | * memory-mapped (which would need special attention). | |
1092 | */ | |
1093 | if (rval < 0 || b->memory != V4L2_MEMORY_MMAP) | |
1094 | goto out; | |
1095 | ||
1096 | rval = omap24xxcam_vbq_alloc_mmap_buffers(&ofh->vbq, rval); | |
1097 | if (rval) | |
1098 | omap24xxcam_vbq_free_mmap_buffers(&ofh->vbq); | |
1099 | ||
1100 | out: | |
1101 | return rval; | |
1102 | } | |
1103 | ||
1104 | static int vidioc_querybuf(struct file *file, void *fh, | |
1105 | struct v4l2_buffer *b) | |
1106 | { | |
1107 | struct omap24xxcam_fh *ofh = fh; | |
1108 | ||
1109 | return videobuf_querybuf(&ofh->vbq, b); | |
1110 | } | |
1111 | ||
1112 | static int vidioc_qbuf(struct file *file, void *fh, struct v4l2_buffer *b) | |
1113 | { | |
1114 | struct omap24xxcam_fh *ofh = fh; | |
1115 | ||
1116 | return videobuf_qbuf(&ofh->vbq, b); | |
1117 | } | |
1118 | ||
1119 | static int vidioc_dqbuf(struct file *file, void *fh, struct v4l2_buffer *b) | |
1120 | { | |
1121 | struct omap24xxcam_fh *ofh = fh; | |
1122 | struct omap24xxcam_device *cam = ofh->cam; | |
1123 | struct videobuf_buffer *vb; | |
1124 | int rval; | |
1125 | ||
1126 | videobuf_dqbuf_again: | |
1127 | rval = videobuf_dqbuf(&ofh->vbq, b, file->f_flags & O_NONBLOCK); | |
1128 | if (rval) | |
1129 | goto out; | |
1130 | ||
1131 | vb = ofh->vbq.bufs[b->index]; | |
1132 | ||
1133 | mutex_lock(&cam->mutex); | |
1134 | /* _needs_reset returns -EIO if reset is required. */ | |
1135 | rval = vidioc_int_g_needs_reset(cam->sdev, (void *)vb->baddr); | |
1136 | mutex_unlock(&cam->mutex); | |
1137 | if (rval == -EIO) | |
1138 | schedule_work(&cam->sensor_reset_work); | |
1139 | else | |
1140 | rval = 0; | |
1141 | ||
1142 | out: | |
1143 | /* | |
1144 | * This is a hack. We don't want to show -EIO to the user | |
1145 | * space. Requeue the buffer and try again if we're not doing | |
1146 | * this in non-blocking mode. | |
1147 | */ | |
1148 | if (rval == -EIO) { | |
1149 | videobuf_qbuf(&ofh->vbq, b); | |
1150 | if (!(file->f_flags & O_NONBLOCK)) | |
1151 | goto videobuf_dqbuf_again; | |
1152 | /* | |
1153 | * We don't have a videobuf_buffer now --- maybe next | |
1154 | * time... | |
1155 | */ | |
1156 | rval = -EAGAIN; | |
1157 | } | |
1158 | ||
1159 | return rval; | |
1160 | } | |
1161 | ||
1162 | static int vidioc_streamon(struct file *file, void *fh, enum v4l2_buf_type i) | |
1163 | { | |
1164 | struct omap24xxcam_fh *ofh = fh; | |
1165 | struct omap24xxcam_device *cam = ofh->cam; | |
1166 | int rval; | |
1167 | ||
1168 | mutex_lock(&cam->mutex); | |
1169 | if (cam->streaming) { | |
1170 | rval = -EBUSY; | |
1171 | goto out; | |
1172 | } | |
1173 | ||
1174 | rval = omap24xxcam_sensor_if_enable(cam); | |
1175 | if (rval) { | |
1176 | dev_dbg(cam->dev, "vidioc_int_g_ifparm failed\n"); | |
1177 | goto out; | |
1178 | } | |
1179 | ||
1180 | rval = videobuf_streamon(&ofh->vbq); | |
1181 | if (!rval) { | |
1182 | cam->streaming = file; | |
1183 | sysfs_notify(&cam->dev->kobj, NULL, "streaming"); | |
1184 | } | |
1185 | ||
1186 | out: | |
1187 | mutex_unlock(&cam->mutex); | |
1188 | ||
1189 | return rval; | |
1190 | } | |
1191 | ||
1192 | static int vidioc_streamoff(struct file *file, void *fh, enum v4l2_buf_type i) | |
1193 | { | |
1194 | struct omap24xxcam_fh *ofh = fh; | |
1195 | struct omap24xxcam_device *cam = ofh->cam; | |
1196 | struct videobuf_queue *q = &ofh->vbq; | |
1197 | int rval; | |
1198 | ||
1199 | atomic_inc(&cam->reset_disable); | |
1200 | ||
1201 | flush_scheduled_work(); | |
1202 | ||
1203 | rval = videobuf_streamoff(q); | |
1204 | if (!rval) { | |
1205 | mutex_lock(&cam->mutex); | |
1206 | cam->streaming = NULL; | |
1207 | mutex_unlock(&cam->mutex); | |
1208 | sysfs_notify(&cam->dev->kobj, NULL, "streaming"); | |
1209 | } | |
1210 | ||
1211 | atomic_dec(&cam->reset_disable); | |
1212 | ||
1213 | return rval; | |
1214 | } | |
1215 | ||
1216 | static int vidioc_enum_input(struct file *file, void *fh, | |
1217 | struct v4l2_input *inp) | |
1218 | { | |
1219 | if (inp->index > 0) | |
1220 | return -EINVAL; | |
1221 | ||
1222 | strlcpy(inp->name, "camera", sizeof(inp->name)); | |
1223 | inp->type = V4L2_INPUT_TYPE_CAMERA; | |
1224 | ||
1225 | return 0; | |
1226 | } | |
1227 | ||
1228 | static int vidioc_g_input(struct file *file, void *fh, unsigned int *i) | |
1229 | { | |
1230 | *i = 0; | |
1231 | ||
1232 | return 0; | |
1233 | } | |
1234 | ||
1235 | static int vidioc_s_input(struct file *file, void *fh, unsigned int i) | |
1236 | { | |
1237 | if (i > 0) | |
1238 | return -EINVAL; | |
1239 | ||
1240 | return 0; | |
1241 | } | |
1242 | ||
1243 | static int vidioc_queryctrl(struct file *file, void *fh, | |
1244 | struct v4l2_queryctrl *a) | |
1245 | { | |
1246 | struct omap24xxcam_fh *ofh = fh; | |
1247 | struct omap24xxcam_device *cam = ofh->cam; | |
1248 | int rval; | |
1249 | ||
1250 | rval = vidioc_int_queryctrl(cam->sdev, a); | |
1251 | ||
1252 | return rval; | |
1253 | } | |
1254 | ||
1255 | static int vidioc_g_ctrl(struct file *file, void *fh, | |
1256 | struct v4l2_control *a) | |
1257 | { | |
1258 | struct omap24xxcam_fh *ofh = fh; | |
1259 | struct omap24xxcam_device *cam = ofh->cam; | |
1260 | int rval; | |
1261 | ||
1262 | mutex_lock(&cam->mutex); | |
1263 | rval = vidioc_int_g_ctrl(cam->sdev, a); | |
1264 | mutex_unlock(&cam->mutex); | |
1265 | ||
1266 | return rval; | |
1267 | } | |
1268 | ||
1269 | static int vidioc_s_ctrl(struct file *file, void *fh, | |
1270 | struct v4l2_control *a) | |
1271 | { | |
1272 | struct omap24xxcam_fh *ofh = fh; | |
1273 | struct omap24xxcam_device *cam = ofh->cam; | |
1274 | int rval; | |
1275 | ||
1276 | mutex_lock(&cam->mutex); | |
1277 | rval = vidioc_int_s_ctrl(cam->sdev, a); | |
1278 | mutex_unlock(&cam->mutex); | |
1279 | ||
1280 | return rval; | |
1281 | } | |
1282 | ||
1283 | static int vidioc_g_parm(struct file *file, void *fh, | |
1284 | struct v4l2_streamparm *a) { | |
1285 | struct omap24xxcam_fh *ofh = fh; | |
1286 | struct omap24xxcam_device *cam = ofh->cam; | |
1287 | int rval; | |
1288 | ||
39aee69a SA |
1289 | mutex_lock(&cam->mutex); |
1290 | rval = vidioc_int_g_parm(cam->sdev, a); | |
1291 | mutex_unlock(&cam->mutex); | |
1292 | ||
1293 | return rval; | |
1294 | } | |
1295 | ||
1296 | static int vidioc_s_parm(struct file *file, void *fh, | |
1297 | struct v4l2_streamparm *a) | |
1298 | { | |
1299 | struct omap24xxcam_fh *ofh = fh; | |
1300 | struct omap24xxcam_device *cam = ofh->cam; | |
1301 | struct v4l2_streamparm old_streamparm; | |
1302 | int rval; | |
1303 | ||
39aee69a SA |
1304 | mutex_lock(&cam->mutex); |
1305 | if (cam->streaming) { | |
1306 | rval = -EBUSY; | |
1307 | goto out; | |
1308 | } | |
1309 | ||
1310 | old_streamparm.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
1311 | rval = vidioc_int_g_parm(cam->sdev, &old_streamparm); | |
1312 | if (rval) | |
1313 | goto out; | |
1314 | ||
1315 | rval = vidioc_int_s_parm(cam->sdev, a); | |
1316 | if (rval) | |
1317 | goto out; | |
1318 | ||
1319 | rval = omap24xxcam_sensor_if_enable(cam); | |
1320 | /* | |
1321 | * Revert to old streaming parameters if enabling sensor | |
1322 | * interface with the new ones failed. | |
1323 | */ | |
1324 | if (rval) | |
1325 | vidioc_int_s_parm(cam->sdev, &old_streamparm); | |
1326 | ||
1327 | out: | |
1328 | mutex_unlock(&cam->mutex); | |
1329 | ||
1330 | return rval; | |
1331 | } | |
1332 | ||
1333 | /* | |
1334 | * | |
1335 | * File operations. | |
1336 | * | |
1337 | */ | |
1338 | ||
1339 | static unsigned int omap24xxcam_poll(struct file *file, | |
1340 | struct poll_table_struct *wait) | |
1341 | { | |
1342 | struct omap24xxcam_fh *fh = file->private_data; | |
1343 | struct omap24xxcam_device *cam = fh->cam; | |
1344 | struct videobuf_buffer *vb; | |
1345 | ||
1346 | mutex_lock(&cam->mutex); | |
1347 | if (cam->streaming != file) { | |
1348 | mutex_unlock(&cam->mutex); | |
1349 | return POLLERR; | |
1350 | } | |
1351 | mutex_unlock(&cam->mutex); | |
1352 | ||
1353 | mutex_lock(&fh->vbq.vb_lock); | |
1354 | if (list_empty(&fh->vbq.stream)) { | |
1355 | mutex_unlock(&fh->vbq.vb_lock); | |
1356 | return POLLERR; | |
1357 | } | |
1358 | vb = list_entry(fh->vbq.stream.next, struct videobuf_buffer, stream); | |
1359 | mutex_unlock(&fh->vbq.vb_lock); | |
1360 | ||
1361 | poll_wait(file, &vb->done, wait); | |
1362 | ||
1363 | if (vb->state == VIDEOBUF_DONE || vb->state == VIDEOBUF_ERROR) | |
1364 | return POLLIN | POLLRDNORM; | |
1365 | ||
1366 | return 0; | |
1367 | } | |
1368 | ||
1369 | static int omap24xxcam_mmap_buffers(struct file *file, | |
1370 | struct vm_area_struct *vma) | |
1371 | { | |
1372 | struct omap24xxcam_fh *fh = file->private_data; | |
1373 | struct omap24xxcam_device *cam = fh->cam; | |
1374 | struct videobuf_queue *vbq = &fh->vbq; | |
1375 | unsigned int first, last, size, i, j; | |
1376 | int err = 0; | |
1377 | ||
1378 | mutex_lock(&cam->mutex); | |
1379 | if (cam->streaming) { | |
1380 | mutex_unlock(&cam->mutex); | |
1381 | return -EBUSY; | |
1382 | } | |
1383 | mutex_unlock(&cam->mutex); | |
1384 | mutex_lock(&vbq->vb_lock); | |
1385 | ||
1386 | /* look for first buffer to map */ | |
1387 | for (first = 0; first < VIDEO_MAX_FRAME; first++) { | |
1388 | if (NULL == vbq->bufs[first]) | |
1389 | continue; | |
1390 | if (V4L2_MEMORY_MMAP != vbq->bufs[first]->memory) | |
1391 | continue; | |
1392 | if (vbq->bufs[first]->boff == (vma->vm_pgoff << PAGE_SHIFT)) | |
1393 | break; | |
1394 | } | |
1395 | ||
1396 | /* look for last buffer to map */ | |
1397 | for (size = 0, last = first; last < VIDEO_MAX_FRAME; last++) { | |
1398 | if (NULL == vbq->bufs[last]) | |
1399 | continue; | |
1400 | if (V4L2_MEMORY_MMAP != vbq->bufs[last]->memory) | |
1401 | continue; | |
1402 | size += vbq->bufs[last]->bsize; | |
1403 | if (size == (vma->vm_end - vma->vm_start)) | |
1404 | break; | |
1405 | } | |
1406 | ||
1407 | size = 0; | |
1408 | for (i = first; i <= last; i++) { | |
1409 | struct videobuf_dmabuf *dma = videobuf_to_dma(vbq->bufs[i]); | |
1410 | ||
1411 | for (j = 0; j < dma->sglen; j++) { | |
1412 | err = remap_pfn_range( | |
1413 | vma, vma->vm_start + size, | |
1414 | page_to_pfn(sg_page(&dma->sglist[j])), | |
1415 | sg_dma_len(&dma->sglist[j]), vma->vm_page_prot); | |
1416 | if (err) | |
1417 | goto out; | |
1418 | size += sg_dma_len(&dma->sglist[j]); | |
1419 | } | |
1420 | } | |
1421 | ||
1422 | out: | |
1423 | mutex_unlock(&vbq->vb_lock); | |
1424 | ||
1425 | return err; | |
1426 | } | |
1427 | ||
1428 | static int omap24xxcam_mmap(struct file *file, struct vm_area_struct *vma) | |
1429 | { | |
1430 | struct omap24xxcam_fh *fh = file->private_data; | |
1431 | int rval; | |
1432 | ||
1433 | /* let the video-buf mapper check arguments and set-up structures */ | |
1434 | rval = videobuf_mmap_mapper(&fh->vbq, vma); | |
1435 | if (rval) | |
1436 | return rval; | |
1437 | ||
1438 | vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); | |
1439 | ||
1440 | /* do mapping to our allocated buffers */ | |
1441 | rval = omap24xxcam_mmap_buffers(file, vma); | |
1442 | /* | |
1443 | * In case of error, free vma->vm_private_data allocated by | |
1444 | * videobuf_mmap_mapper. | |
1445 | */ | |
1446 | if (rval) | |
1447 | kfree(vma->vm_private_data); | |
1448 | ||
1449 | return rval; | |
1450 | } | |
1451 | ||
bec43661 | 1452 | static int omap24xxcam_open(struct file *file) |
39aee69a | 1453 | { |
39aee69a SA |
1454 | struct omap24xxcam_device *cam = omap24xxcam.priv; |
1455 | struct omap24xxcam_fh *fh; | |
1456 | struct v4l2_format format; | |
1457 | ||
327ae597 | 1458 | if (!cam || !cam->vfd) |
39aee69a SA |
1459 | return -ENODEV; |
1460 | ||
1461 | fh = kzalloc(sizeof(*fh), GFP_KERNEL); | |
1462 | if (fh == NULL) | |
1463 | return -ENOMEM; | |
1464 | ||
1465 | mutex_lock(&cam->mutex); | |
1466 | if (cam->sdev == NULL || !try_module_get(cam->sdev->module)) { | |
1467 | mutex_unlock(&cam->mutex); | |
1468 | goto out_try_module_get; | |
1469 | } | |
1470 | ||
1471 | if (atomic_inc_return(&cam->users) == 1) { | |
1472 | omap24xxcam_hwinit(cam); | |
1473 | if (omap24xxcam_sensor_enable(cam)) { | |
1474 | mutex_unlock(&cam->mutex); | |
1475 | goto out_omap24xxcam_sensor_enable; | |
1476 | } | |
1477 | } | |
1478 | mutex_unlock(&cam->mutex); | |
1479 | ||
1480 | fh->cam = cam; | |
1481 | mutex_lock(&cam->mutex); | |
1482 | vidioc_int_g_fmt_cap(cam->sdev, &format); | |
1483 | mutex_unlock(&cam->mutex); | |
1484 | /* FIXME: how about fh->pix when there are more users? */ | |
1485 | fh->pix = format.fmt.pix; | |
1486 | ||
1487 | file->private_data = fh; | |
1488 | ||
1489 | spin_lock_init(&fh->vbq_lock); | |
1490 | ||
1491 | videobuf_queue_sg_init(&fh->vbq, &omap24xxcam_vbq_ops, NULL, | |
1492 | &fh->vbq_lock, V4L2_BUF_TYPE_VIDEO_CAPTURE, | |
1493 | V4L2_FIELD_NONE, | |
1494 | sizeof(struct videobuf_buffer), fh); | |
1495 | ||
1496 | return 0; | |
1497 | ||
1498 | out_omap24xxcam_sensor_enable: | |
1499 | omap24xxcam_poweron_reset(cam); | |
1500 | module_put(cam->sdev->module); | |
1501 | ||
1502 | out_try_module_get: | |
1503 | kfree(fh); | |
1504 | ||
1505 | return -ENODEV; | |
1506 | } | |
1507 | ||
bec43661 | 1508 | static int omap24xxcam_release(struct file *file) |
39aee69a SA |
1509 | { |
1510 | struct omap24xxcam_fh *fh = file->private_data; | |
1511 | struct omap24xxcam_device *cam = fh->cam; | |
1512 | ||
1513 | atomic_inc(&cam->reset_disable); | |
1514 | ||
1515 | flush_scheduled_work(); | |
1516 | ||
1517 | /* stop streaming capture */ | |
1518 | videobuf_streamoff(&fh->vbq); | |
1519 | ||
1520 | mutex_lock(&cam->mutex); | |
1521 | if (cam->streaming == file) { | |
1522 | cam->streaming = NULL; | |
1523 | mutex_unlock(&cam->mutex); | |
1524 | sysfs_notify(&cam->dev->kobj, NULL, "streaming"); | |
1525 | } else { | |
1526 | mutex_unlock(&cam->mutex); | |
1527 | } | |
1528 | ||
1529 | atomic_dec(&cam->reset_disable); | |
1530 | ||
1531 | omap24xxcam_vbq_free_mmap_buffers(&fh->vbq); | |
1532 | ||
1533 | /* | |
1534 | * Make sure the reset work we might have scheduled is not | |
1535 | * pending! It may be run *only* if we have users. (And it may | |
1536 | * not be scheduled anymore since streaming is already | |
1537 | * disabled.) | |
1538 | */ | |
1539 | flush_scheduled_work(); | |
1540 | ||
1541 | mutex_lock(&cam->mutex); | |
1542 | if (atomic_dec_return(&cam->users) == 0) { | |
1543 | omap24xxcam_sensor_disable(cam); | |
1544 | omap24xxcam_poweron_reset(cam); | |
1545 | } | |
1546 | mutex_unlock(&cam->mutex); | |
1547 | ||
1548 | file->private_data = NULL; | |
1549 | ||
1550 | module_put(cam->sdev->module); | |
1551 | kfree(fh); | |
1552 | ||
1553 | return 0; | |
1554 | } | |
1555 | ||
bec43661 | 1556 | static struct v4l2_file_operations omap24xxcam_fops = { |
39aee69a SA |
1557 | .ioctl = video_ioctl2, |
1558 | .poll = omap24xxcam_poll, | |
1559 | .mmap = omap24xxcam_mmap, | |
1560 | .open = omap24xxcam_open, | |
1561 | .release = omap24xxcam_release, | |
1562 | }; | |
1563 | ||
1564 | /* | |
1565 | * | |
1566 | * Power management. | |
1567 | * | |
1568 | */ | |
1569 | ||
1570 | #ifdef CONFIG_PM | |
1571 | static int omap24xxcam_suspend(struct platform_device *pdev, pm_message_t state) | |
1572 | { | |
1573 | struct omap24xxcam_device *cam = platform_get_drvdata(pdev); | |
1574 | ||
1575 | if (atomic_read(&cam->users) == 0) | |
1576 | return 0; | |
1577 | ||
1578 | if (!atomic_read(&cam->reset_disable)) | |
1579 | omap24xxcam_capture_stop(cam); | |
1580 | ||
1581 | omap24xxcam_sensor_disable(cam); | |
1582 | omap24xxcam_poweron_reset(cam); | |
1583 | ||
1584 | return 0; | |
1585 | } | |
1586 | ||
1587 | static int omap24xxcam_resume(struct platform_device *pdev) | |
1588 | { | |
1589 | struct omap24xxcam_device *cam = platform_get_drvdata(pdev); | |
1590 | ||
1591 | if (atomic_read(&cam->users) == 0) | |
1592 | return 0; | |
1593 | ||
1594 | omap24xxcam_hwinit(cam); | |
1595 | omap24xxcam_sensor_enable(cam); | |
1596 | ||
1597 | if (!atomic_read(&cam->reset_disable)) | |
1598 | omap24xxcam_capture_cont(cam); | |
1599 | ||
1600 | return 0; | |
1601 | } | |
1602 | #endif /* CONFIG_PM */ | |
1603 | ||
1604 | static const struct v4l2_ioctl_ops omap24xxcam_ioctl_fops = { | |
1605 | .vidioc_querycap = vidioc_querycap, | |
1606 | .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, | |
1607 | .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, | |
1608 | .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, | |
1609 | .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, | |
1610 | .vidioc_reqbufs = vidioc_reqbufs, | |
1611 | .vidioc_querybuf = vidioc_querybuf, | |
1612 | .vidioc_qbuf = vidioc_qbuf, | |
1613 | .vidioc_dqbuf = vidioc_dqbuf, | |
1614 | .vidioc_streamon = vidioc_streamon, | |
1615 | .vidioc_streamoff = vidioc_streamoff, | |
1616 | .vidioc_enum_input = vidioc_enum_input, | |
1617 | .vidioc_g_input = vidioc_g_input, | |
1618 | .vidioc_s_input = vidioc_s_input, | |
1619 | .vidioc_queryctrl = vidioc_queryctrl, | |
1620 | .vidioc_g_ctrl = vidioc_g_ctrl, | |
1621 | .vidioc_s_ctrl = vidioc_s_ctrl, | |
1622 | .vidioc_g_parm = vidioc_g_parm, | |
1623 | .vidioc_s_parm = vidioc_s_parm, | |
1624 | }; | |
1625 | ||
1626 | /* | |
1627 | * | |
1628 | * Camera device (i.e. /dev/video). | |
1629 | * | |
1630 | */ | |
1631 | ||
1632 | static int omap24xxcam_device_register(struct v4l2_int_device *s) | |
1633 | { | |
1634 | struct omap24xxcam_device *cam = s->u.slave->master->priv; | |
1635 | struct video_device *vfd; | |
1636 | int rval; | |
1637 | ||
1638 | /* We already have a slave. */ | |
1639 | if (cam->sdev) | |
1640 | return -EBUSY; | |
1641 | ||
1642 | cam->sdev = s; | |
1643 | ||
1644 | if (device_create_file(cam->dev, &dev_attr_streaming) != 0) { | |
1645 | dev_err(cam->dev, "could not register sysfs entry\n"); | |
1646 | rval = -EBUSY; | |
1647 | goto err; | |
1648 | } | |
1649 | ||
1650 | /* initialize the video_device struct */ | |
1651 | vfd = cam->vfd = video_device_alloc(); | |
1652 | if (!vfd) { | |
1653 | dev_err(cam->dev, "could not allocate video device struct\n"); | |
1654 | rval = -ENOMEM; | |
1655 | goto err; | |
1656 | } | |
1657 | vfd->release = video_device_release; | |
1658 | ||
1659 | vfd->parent = cam->dev; | |
1660 | ||
1661 | strlcpy(vfd->name, CAM_NAME, sizeof(vfd->name)); | |
39aee69a | 1662 | vfd->fops = &omap24xxcam_fops; |
39aee69a SA |
1663 | vfd->ioctl_ops = &omap24xxcam_ioctl_fops; |
1664 | ||
1665 | omap24xxcam_hwinit(cam); | |
1666 | ||
1667 | rval = omap24xxcam_sensor_init(cam); | |
1668 | if (rval) | |
1669 | goto err; | |
1670 | ||
1671 | if (video_register_device(vfd, VFL_TYPE_GRABBER, video_nr) < 0) { | |
1672 | dev_err(cam->dev, "could not register V4L device\n"); | |
39aee69a SA |
1673 | rval = -EBUSY; |
1674 | goto err; | |
1675 | } | |
1676 | ||
1677 | omap24xxcam_poweron_reset(cam); | |
1678 | ||
38c7c036 LP |
1679 | dev_info(cam->dev, "registered device %s\n", |
1680 | video_device_node_name(vfd)); | |
39aee69a SA |
1681 | |
1682 | return 0; | |
1683 | ||
1684 | err: | |
1685 | omap24xxcam_device_unregister(s); | |
1686 | ||
1687 | return rval; | |
1688 | } | |
1689 | ||
1690 | static void omap24xxcam_device_unregister(struct v4l2_int_device *s) | |
1691 | { | |
1692 | struct omap24xxcam_device *cam = s->u.slave->master->priv; | |
1693 | ||
1694 | omap24xxcam_sensor_exit(cam); | |
1695 | ||
1696 | if (cam->vfd) { | |
f0813b4c | 1697 | if (!video_is_registered(cam->vfd)) { |
39aee69a SA |
1698 | /* |
1699 | * The device was never registered, so release the | |
1700 | * video_device struct directly. | |
1701 | */ | |
1702 | video_device_release(cam->vfd); | |
1703 | } else { | |
1704 | /* | |
1705 | * The unregister function will release the | |
1706 | * video_device struct as well as | |
1707 | * unregistering it. | |
1708 | */ | |
1709 | video_unregister_device(cam->vfd); | |
1710 | } | |
1711 | cam->vfd = NULL; | |
1712 | } | |
1713 | ||
1714 | device_remove_file(cam->dev, &dev_attr_streaming); | |
1715 | ||
1716 | cam->sdev = NULL; | |
1717 | } | |
1718 | ||
1719 | static struct v4l2_int_master omap24xxcam_master = { | |
1720 | .attach = omap24xxcam_device_register, | |
1721 | .detach = omap24xxcam_device_unregister, | |
1722 | }; | |
1723 | ||
1724 | static struct v4l2_int_device omap24xxcam = { | |
1725 | .module = THIS_MODULE, | |
1726 | .name = CAM_NAME, | |
1727 | .type = v4l2_int_type_master, | |
1728 | .u = { | |
1729 | .master = &omap24xxcam_master | |
1730 | }, | |
1731 | }; | |
1732 | ||
1733 | /* | |
1734 | * | |
1735 | * Driver initialisation and deinitialisation. | |
1736 | * | |
1737 | */ | |
1738 | ||
ea180ca4 | 1739 | static int __devinit omap24xxcam_probe(struct platform_device *pdev) |
39aee69a SA |
1740 | { |
1741 | struct omap24xxcam_device *cam; | |
1742 | struct resource *mem; | |
1743 | int irq; | |
1744 | ||
1745 | cam = kzalloc(sizeof(*cam), GFP_KERNEL); | |
1746 | if (!cam) { | |
1747 | dev_err(&pdev->dev, "could not allocate memory\n"); | |
1748 | goto err; | |
1749 | } | |
1750 | ||
1751 | platform_set_drvdata(pdev, cam); | |
1752 | ||
1753 | cam->dev = &pdev->dev; | |
1754 | ||
1755 | /* | |
1756 | * Impose a lower limit on the amount of memory allocated for | |
1757 | * capture. We require at least enough memory to double-buffer | |
1758 | * QVGA (300KB). | |
1759 | */ | |
1760 | if (capture_mem < 320 * 240 * 2 * 2) | |
1761 | capture_mem = 320 * 240 * 2 * 2; | |
1762 | cam->capture_mem = capture_mem; | |
1763 | ||
1764 | /* request the mem region for the camera registers */ | |
1765 | mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1766 | if (!mem) { | |
1767 | dev_err(cam->dev, "no mem resource?\n"); | |
1768 | goto err; | |
1769 | } | |
1770 | if (!request_mem_region(mem->start, (mem->end - mem->start) + 1, | |
1771 | pdev->name)) { | |
1772 | dev_err(cam->dev, | |
1773 | "cannot reserve camera register I/O region\n"); | |
1774 | goto err; | |
1775 | } | |
1776 | cam->mmio_base_phys = mem->start; | |
1777 | cam->mmio_size = (mem->end - mem->start) + 1; | |
1778 | ||
1779 | /* map the region */ | |
1780 | cam->mmio_base = (unsigned long) | |
1781 | ioremap_nocache(cam->mmio_base_phys, cam->mmio_size); | |
1782 | if (!cam->mmio_base) { | |
1783 | dev_err(cam->dev, "cannot map camera register I/O region\n"); | |
1784 | goto err; | |
1785 | } | |
1786 | ||
1787 | irq = platform_get_irq(pdev, 0); | |
1788 | if (irq <= 0) { | |
1789 | dev_err(cam->dev, "no irq for camera?\n"); | |
1790 | goto err; | |
1791 | } | |
1792 | ||
1793 | /* install the interrupt service routine */ | |
1794 | if (request_irq(irq, omap24xxcam_isr, 0, CAM_NAME, cam)) { | |
1795 | dev_err(cam->dev, | |
1796 | "could not install interrupt service routine\n"); | |
1797 | goto err; | |
1798 | } | |
1799 | cam->irq = irq; | |
1800 | ||
1801 | if (omap24xxcam_clock_get(cam)) | |
1802 | goto err; | |
1803 | ||
1804 | INIT_WORK(&cam->sensor_reset_work, omap24xxcam_sensor_reset_work); | |
1805 | ||
1806 | mutex_init(&cam->mutex); | |
1807 | spin_lock_init(&cam->core_enable_disable_lock); | |
1808 | ||
1809 | omap24xxcam_sgdma_init(&cam->sgdma, | |
1810 | cam->mmio_base + CAMDMA_REG_OFFSET, | |
1811 | omap24xxcam_stalled_dma_reset, | |
1812 | (unsigned long)cam); | |
1813 | ||
1814 | omap24xxcam.priv = cam; | |
1815 | ||
1816 | if (v4l2_int_device_register(&omap24xxcam)) | |
1817 | goto err; | |
1818 | ||
1819 | return 0; | |
1820 | ||
1821 | err: | |
1822 | omap24xxcam_remove(pdev); | |
1823 | return -ENODEV; | |
1824 | } | |
1825 | ||
1826 | static int omap24xxcam_remove(struct platform_device *pdev) | |
1827 | { | |
1828 | struct omap24xxcam_device *cam = platform_get_drvdata(pdev); | |
1829 | ||
1830 | if (!cam) | |
1831 | return 0; | |
1832 | ||
1833 | if (omap24xxcam.priv != NULL) | |
1834 | v4l2_int_device_unregister(&omap24xxcam); | |
1835 | omap24xxcam.priv = NULL; | |
1836 | ||
1837 | omap24xxcam_clock_put(cam); | |
1838 | ||
1839 | if (cam->irq) { | |
1840 | free_irq(cam->irq, cam); | |
1841 | cam->irq = 0; | |
1842 | } | |
1843 | ||
1844 | if (cam->mmio_base) { | |
1845 | iounmap((void *)cam->mmio_base); | |
1846 | cam->mmio_base = 0; | |
1847 | } | |
1848 | ||
1849 | if (cam->mmio_base_phys) { | |
1850 | release_mem_region(cam->mmio_base_phys, cam->mmio_size); | |
1851 | cam->mmio_base_phys = 0; | |
1852 | } | |
1853 | ||
1854 | kfree(cam); | |
1855 | ||
1856 | return 0; | |
1857 | } | |
1858 | ||
1859 | static struct platform_driver omap24xxcam_driver = { | |
1860 | .probe = omap24xxcam_probe, | |
1861 | .remove = omap24xxcam_remove, | |
1862 | #ifdef CONFIG_PM | |
1863 | .suspend = omap24xxcam_suspend, | |
1864 | .resume = omap24xxcam_resume, | |
1865 | #endif | |
1866 | .driver = { | |
1867 | .name = CAM_NAME, | |
1868 | .owner = THIS_MODULE, | |
1869 | }, | |
1870 | }; | |
1871 | ||
1872 | /* | |
1873 | * | |
1874 | * Module initialisation and deinitialisation | |
1875 | * | |
1876 | */ | |
1877 | ||
1878 | static int __init omap24xxcam_init(void) | |
1879 | { | |
1880 | return platform_driver_register(&omap24xxcam_driver); | |
1881 | } | |
1882 | ||
1883 | static void __exit omap24xxcam_cleanup(void) | |
1884 | { | |
1885 | platform_driver_unregister(&omap24xxcam_driver); | |
1886 | } | |
1887 | ||
1888 | MODULE_AUTHOR("Sakari Ailus <sakari.ailus@nokia.com>"); | |
1889 | MODULE_DESCRIPTION("OMAP24xx Video for Linux camera driver"); | |
1890 | MODULE_LICENSE("GPL"); | |
1891 | module_param(video_nr, int, 0); | |
1892 | MODULE_PARM_DESC(video_nr, | |
1893 | "Minor number for video device (-1 ==> auto assign)"); | |
1894 | module_param(capture_mem, int, 0); | |
1895 | MODULE_PARM_DESC(capture_mem, "Maximum amount of memory for capture " | |
1896 | "buffers (default 4800kiB)"); | |
1897 | ||
1898 | module_init(omap24xxcam_init); | |
1899 | module_exit(omap24xxcam_cleanup); |