Commit | Line | Data |
---|---|---|
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 */ | |
39aee69a SA |
34 | #include <linux/platform_device.h> |
35 | #include <linux/clk.h> | |
36 | #include <linux/io.h> | |
5a0e3ad6 | 37 | #include <linux/slab.h> |
d1303567 | 38 | #include <linux/sched.h> |
7a707b89 | 39 | #include <linux/module.h> |
39aee69a SA |
40 | |
41 | #include <media/v4l2-common.h> | |
42 | #include <media/v4l2-ioctl.h> | |
43 | ||
44 | #include "omap24xxcam.h" | |
45 | ||
64dc3c1a | 46 | #define OMAP24XXCAM_VERSION "0.0.1" |
39aee69a SA |
47 | |
48 | #define RESET_TIMEOUT_NS 10000 | |
49 | ||
50 | static void omap24xxcam_reset(struct omap24xxcam_device *cam); | |
51 | static int omap24xxcam_sensor_if_enable(struct omap24xxcam_device *cam); | |
52 | static void omap24xxcam_device_unregister(struct v4l2_int_device *s); | |
53 | static int omap24xxcam_remove(struct platform_device *pdev); | |
54 | ||
55 | /* module parameters */ | |
56 | static int video_nr = -1; /* video device minor (-1 ==> auto assign) */ | |
57 | /* | |
58 | * Maximum amount of memory to use for capture buffers. | |
59 | * Default is 4800KB, enough to double-buffer SXGA. | |
60 | */ | |
61 | static int capture_mem = 1280 * 960 * 2 * 2; | |
62 | ||
63 | static struct v4l2_int_device omap24xxcam; | |
64 | ||
65 | /* | |
66 | * | |
67 | * Clocks. | |
68 | * | |
69 | */ | |
70 | ||
71 | static void omap24xxcam_clock_put(struct omap24xxcam_device *cam) | |
72 | { | |
73 | if (cam->ick != NULL && !IS_ERR(cam->ick)) | |
74 | clk_put(cam->ick); | |
75 | if (cam->fck != NULL && !IS_ERR(cam->fck)) | |
76 | clk_put(cam->fck); | |
77 | ||
78 | cam->ick = cam->fck = NULL; | |
79 | } | |
80 | ||
81 | static int omap24xxcam_clock_get(struct omap24xxcam_device *cam) | |
82 | { | |
83 | int rval = 0; | |
84 | ||
6c5dbb40 | 85 | cam->fck = clk_get(cam->dev, "fck"); |
39aee69a | 86 | if (IS_ERR(cam->fck)) { |
6c5dbb40 | 87 | dev_err(cam->dev, "can't get camera fck"); |
39aee69a SA |
88 | rval = PTR_ERR(cam->fck); |
89 | omap24xxcam_clock_put(cam); | |
90 | return rval; | |
91 | } | |
92 | ||
6c5dbb40 | 93 | cam->ick = clk_get(cam->dev, "ick"); |
39aee69a | 94 | if (IS_ERR(cam->ick)) { |
6c5dbb40 | 95 | dev_err(cam->dev, "can't get camera ick"); |
39aee69a SA |
96 | rval = PTR_ERR(cam->ick); |
97 | omap24xxcam_clock_put(cam); | |
98 | } | |
99 | ||
100 | return rval; | |
101 | } | |
102 | ||
103 | static void omap24xxcam_clock_on(struct omap24xxcam_device *cam) | |
104 | { | |
105 | clk_enable(cam->fck); | |
106 | clk_enable(cam->ick); | |
107 | } | |
108 | ||
109 | static void omap24xxcam_clock_off(struct omap24xxcam_device *cam) | |
110 | { | |
111 | clk_disable(cam->fck); | |
112 | clk_disable(cam->ick); | |
113 | } | |
114 | ||
115 | /* | |
116 | * | |
117 | * Camera core | |
118 | * | |
119 | */ | |
120 | ||
121 | /* | |
122 | * Set xclk. | |
123 | * | |
124 | * To disable xclk, use value zero. | |
125 | */ | |
126 | static void omap24xxcam_core_xclk_set(const struct omap24xxcam_device *cam, | |
127 | u32 xclk) | |
128 | { | |
129 | if (xclk) { | |
130 | u32 divisor = CAM_MCLK / xclk; | |
131 | ||
132 | if (divisor == 1) | |
133 | omap24xxcam_reg_out(cam->mmio_base + CC_REG_OFFSET, | |
134 | CC_CTRL_XCLK, | |
135 | CC_CTRL_XCLK_DIV_BYPASS); | |
136 | else | |
137 | omap24xxcam_reg_out(cam->mmio_base + CC_REG_OFFSET, | |
138 | CC_CTRL_XCLK, divisor); | |
139 | } else | |
140 | omap24xxcam_reg_out(cam->mmio_base + CC_REG_OFFSET, | |
141 | CC_CTRL_XCLK, CC_CTRL_XCLK_DIV_STABLE_LOW); | |
142 | } | |
143 | ||
144 | static void omap24xxcam_core_hwinit(const struct omap24xxcam_device *cam) | |
145 | { | |
146 | /* | |
147 | * Setting the camera core AUTOIDLE bit causes problems with frame | |
148 | * synchronization, so we will clear the AUTOIDLE bit instead. | |
149 | */ | |
150 | omap24xxcam_reg_out(cam->mmio_base + CC_REG_OFFSET, CC_SYSCONFIG, | |
151 | CC_SYSCONFIG_AUTOIDLE); | |
152 | ||
153 | /* program the camera interface DMA packet size */ | |
154 | omap24xxcam_reg_out(cam->mmio_base + CC_REG_OFFSET, CC_CTRL_DMA, | |
155 | CC_CTRL_DMA_EN | (DMA_THRESHOLD / 4 - 1)); | |
156 | ||
157 | /* enable camera core error interrupts */ | |
158 | omap24xxcam_reg_out(cam->mmio_base + CC_REG_OFFSET, CC_IRQENABLE, | |
159 | CC_IRQENABLE_FW_ERR_IRQ | |
160 | | CC_IRQENABLE_FSC_ERR_IRQ | |
161 | | CC_IRQENABLE_SSC_ERR_IRQ | |
162 | | CC_IRQENABLE_FIFO_OF_IRQ); | |
163 | } | |
164 | ||
165 | /* | |
166 | * Enable the camera core. | |
167 | * | |
168 | * Data transfer to the camera DMA starts from next starting frame. | |
169 | */ | |
170 | static void omap24xxcam_core_enable(const struct omap24xxcam_device *cam) | |
171 | { | |
172 | ||
173 | omap24xxcam_reg_out(cam->mmio_base + CC_REG_OFFSET, CC_CTRL, | |
174 | cam->cc_ctrl); | |
175 | } | |
176 | ||
177 | /* | |
178 | * Disable camera core. | |
179 | * | |
180 | * The data transfer will be stopped immediately (CC_CTRL_CC_RST). The | |
181 | * core internal state machines will be reset. Use | |
182 | * CC_CTRL_CC_FRAME_TRIG instead if you want to transfer the current | |
183 | * frame completely. | |
184 | */ | |
185 | static void omap24xxcam_core_disable(const struct omap24xxcam_device *cam) | |
186 | { | |
187 | omap24xxcam_reg_out(cam->mmio_base + CC_REG_OFFSET, CC_CTRL, | |
188 | CC_CTRL_CC_RST); | |
189 | } | |
190 | ||
191 | /* Interrupt service routine for camera core interrupts. */ | |
192 | static void omap24xxcam_core_isr(struct omap24xxcam_device *cam) | |
193 | { | |
194 | u32 cc_irqstatus; | |
195 | const u32 cc_irqstatus_err = | |
196 | CC_IRQSTATUS_FW_ERR_IRQ | |
197 | | CC_IRQSTATUS_FSC_ERR_IRQ | |
198 | | CC_IRQSTATUS_SSC_ERR_IRQ | |
199 | | CC_IRQSTATUS_FIFO_UF_IRQ | |
200 | | CC_IRQSTATUS_FIFO_OF_IRQ; | |
201 | ||
202 | cc_irqstatus = omap24xxcam_reg_in(cam->mmio_base + CC_REG_OFFSET, | |
203 | CC_IRQSTATUS); | |
204 | omap24xxcam_reg_out(cam->mmio_base + CC_REG_OFFSET, CC_IRQSTATUS, | |
205 | cc_irqstatus); | |
206 | ||
207 | if (cc_irqstatus & cc_irqstatus_err | |
208 | && !atomic_read(&cam->in_reset)) { | |
209 | dev_dbg(cam->dev, "resetting camera, cc_irqstatus 0x%x\n", | |
210 | cc_irqstatus); | |
211 | omap24xxcam_reset(cam); | |
212 | } | |
213 | } | |
214 | ||
215 | /* | |
216 | * | |
217 | * videobuf_buffer handling. | |
218 | * | |
219 | * Memory for mmapped videobuf_buffers is not allocated | |
220 | * conventionally, but by several kmalloc allocations and then | |
221 | * creating the scatterlist on our own. User-space buffers are handled | |
222 | * normally. | |
223 | * | |
224 | */ | |
225 | ||
226 | /* | |
227 | * Free the memory-mapped buffer memory allocated for a | |
228 | * videobuf_buffer and the associated scatterlist. | |
229 | */ | |
230 | static void omap24xxcam_vbq_free_mmap_buffer(struct videobuf_buffer *vb) | |
231 | { | |
232 | struct videobuf_dmabuf *dma = videobuf_to_dma(vb); | |
233 | size_t alloc_size; | |
234 | struct page *page; | |
235 | int i; | |
236 | ||
237 | if (dma->sglist == NULL) | |
238 | return; | |
239 | ||
240 | i = dma->sglen; | |
241 | while (i) { | |
242 | i--; | |
243 | alloc_size = sg_dma_len(&dma->sglist[i]); | |
244 | page = sg_page(&dma->sglist[i]); | |
245 | do { | |
246 | ClearPageReserved(page++); | |
247 | } while (alloc_size -= PAGE_SIZE); | |
248 | __free_pages(sg_page(&dma->sglist[i]), | |
249 | get_order(sg_dma_len(&dma->sglist[i]))); | |
250 | } | |
251 | ||
252 | kfree(dma->sglist); | |
253 | dma->sglist = NULL; | |
254 | } | |
255 | ||
256 | /* Release all memory related to the videobuf_queue. */ | |
257 | static void omap24xxcam_vbq_free_mmap_buffers(struct videobuf_queue *vbq) | |
258 | { | |
259 | int i; | |
260 | ||
261 | mutex_lock(&vbq->vb_lock); | |
262 | ||
263 | for (i = 0; i < VIDEO_MAX_FRAME; i++) { | |
264 | if (NULL == vbq->bufs[i]) | |
265 | continue; | |
266 | if (V4L2_MEMORY_MMAP != vbq->bufs[i]->memory) | |
267 | continue; | |
268 | vbq->ops->buf_release(vbq, vbq->bufs[i]); | |
269 | omap24xxcam_vbq_free_mmap_buffer(vbq->bufs[i]); | |
270 | kfree(vbq->bufs[i]); | |
271 | vbq->bufs[i] = NULL; | |
272 | } | |
273 | ||
274 | mutex_unlock(&vbq->vb_lock); | |
275 | ||
276 | videobuf_mmap_free(vbq); | |
277 | } | |
278 | ||
279 | /* | |
280 | * Allocate physically as contiguous as possible buffer for video | |
281 | * frame and allocate and build DMA scatter-gather list for it. | |
282 | */ | |
283 | static int omap24xxcam_vbq_alloc_mmap_buffer(struct videobuf_buffer *vb) | |
284 | { | |
285 | unsigned int order; | |
286 | size_t alloc_size, size = vb->bsize; /* vb->bsize is page aligned */ | |
287 | struct page *page; | |
288 | int max_pages, err = 0, i = 0; | |
289 | struct videobuf_dmabuf *dma = videobuf_to_dma(vb); | |
290 | ||
291 | /* | |
292 | * allocate maximum size scatter-gather list. Note this is | |
293 | * overhead. We may not use as many entries as we allocate | |
294 | */ | |
295 | max_pages = vb->bsize >> PAGE_SHIFT; | |
296 | dma->sglist = kcalloc(max_pages, sizeof(*dma->sglist), GFP_KERNEL); | |
297 | if (dma->sglist == NULL) { | |
298 | err = -ENOMEM; | |
299 | goto out; | |
300 | } | |
301 | ||
302 | while (size) { | |
303 | order = get_order(size); | |
304 | /* | |
305 | * do not over-allocate even if we would get larger | |
306 | * contiguous chunk that way | |
307 | */ | |
308 | if ((PAGE_SIZE << order) > size) | |
309 | order--; | |
310 | ||
311 | /* try to allocate as many contiguous pages as possible */ | |
e213e438 | 312 | page = alloc_pages(GFP_KERNEL, order); |
39aee69a SA |
313 | /* if allocation fails, try to allocate smaller amount */ |
314 | while (page == NULL) { | |
315 | order--; | |
e213e438 | 316 | page = alloc_pages(GFP_KERNEL, order); |
39aee69a SA |
317 | if (page == NULL && !order) { |
318 | err = -ENOMEM; | |
319 | goto out; | |
320 | } | |
321 | } | |
322 | size -= (PAGE_SIZE << order); | |
323 | ||
324 | /* append allocated chunk of pages into scatter-gather list */ | |
325 | sg_set_page(&dma->sglist[i], page, PAGE_SIZE << order, 0); | |
326 | dma->sglen++; | |
327 | i++; | |
328 | ||
329 | alloc_size = (PAGE_SIZE << order); | |
330 | ||
331 | /* clear pages before giving them to user space */ | |
332 | memset(page_address(page), 0, alloc_size); | |
333 | ||
334 | /* mark allocated pages reserved */ | |
335 | do { | |
336 | SetPageReserved(page++); | |
337 | } while (alloc_size -= PAGE_SIZE); | |
338 | } | |
339 | /* | |
340 | * REVISIT: not fully correct to assign nr_pages == sglen but | |
341 | * video-buf is passing nr_pages for e.g. unmap_sg calls | |
342 | */ | |
343 | dma->nr_pages = dma->sglen; | |
344 | dma->direction = PCI_DMA_FROMDEVICE; | |
345 | ||
346 | return 0; | |
347 | ||
348 | out: | |
349 | omap24xxcam_vbq_free_mmap_buffer(vb); | |
350 | return err; | |
351 | } | |
352 | ||
353 | static int omap24xxcam_vbq_alloc_mmap_buffers(struct videobuf_queue *vbq, | |
354 | unsigned int count) | |
355 | { | |
356 | int i, err = 0; | |
357 | struct omap24xxcam_fh *fh = | |
358 | container_of(vbq, struct omap24xxcam_fh, vbq); | |
359 | ||
360 | mutex_lock(&vbq->vb_lock); | |
361 | ||
362 | for (i = 0; i < count; i++) { | |
363 | err = omap24xxcam_vbq_alloc_mmap_buffer(vbq->bufs[i]); | |
364 | if (err) | |
365 | goto out; | |
366 | dev_dbg(fh->cam->dev, "sglen is %d for buffer %d\n", | |
367 | videobuf_to_dma(vbq->bufs[i])->sglen, i); | |
368 | } | |
369 | ||
370 | mutex_unlock(&vbq->vb_lock); | |
371 | ||
372 | return 0; | |
373 | out: | |
374 | while (i) { | |
375 | i--; | |
376 | omap24xxcam_vbq_free_mmap_buffer(vbq->bufs[i]); | |
377 | } | |
378 | ||
379 | mutex_unlock(&vbq->vb_lock); | |
380 | ||
381 | return err; | |
382 | } | |
383 | ||
384 | /* | |
385 | * This routine is called from interrupt context when a scatter-gather DMA | |
386 | * transfer of a videobuf_buffer completes. | |
387 | */ | |
388 | static void omap24xxcam_vbq_complete(struct omap24xxcam_sgdma *sgdma, | |
389 | u32 csr, void *arg) | |
390 | { | |
391 | struct omap24xxcam_device *cam = | |
392 | container_of(sgdma, struct omap24xxcam_device, sgdma); | |
393 | struct omap24xxcam_fh *fh = cam->streaming->private_data; | |
394 | struct videobuf_buffer *vb = (struct videobuf_buffer *)arg; | |
395 | const u32 csr_error = CAMDMA_CSR_MISALIGNED_ERR | |
396 | | CAMDMA_CSR_SUPERVISOR_ERR | CAMDMA_CSR_SECURE_ERR | |
397 | | CAMDMA_CSR_TRANS_ERR | CAMDMA_CSR_DROP; | |
398 | unsigned long flags; | |
399 | ||
400 | spin_lock_irqsave(&cam->core_enable_disable_lock, flags); | |
401 | if (--cam->sgdma_in_queue == 0) | |
402 | omap24xxcam_core_disable(cam); | |
403 | spin_unlock_irqrestore(&cam->core_enable_disable_lock, flags); | |
404 | ||
405 | do_gettimeofday(&vb->ts); | |
406 | vb->field_count = atomic_add_return(2, &fh->field_count); | |
407 | if (csr & csr_error) { | |
408 | vb->state = VIDEOBUF_ERROR; | |
409 | if (!atomic_read(&fh->cam->in_reset)) { | |
410 | dev_dbg(cam->dev, "resetting camera, csr 0x%x\n", csr); | |
411 | omap24xxcam_reset(cam); | |
412 | } | |
413 | } else | |
414 | vb->state = VIDEOBUF_DONE; | |
415 | wake_up(&vb->done); | |
416 | } | |
417 | ||
418 | static void omap24xxcam_vbq_release(struct videobuf_queue *vbq, | |
419 | struct videobuf_buffer *vb) | |
420 | { | |
421 | struct videobuf_dmabuf *dma = videobuf_to_dma(vb); | |
422 | ||
423 | /* wait for buffer, especially to get out of the sgdma queue */ | |
0e0809a5 | 424 | videobuf_waiton(vbq, vb, 0, 0); |
39aee69a SA |
425 | if (vb->memory == V4L2_MEMORY_MMAP) { |
426 | dma_unmap_sg(vbq->dev, dma->sglist, dma->sglen, | |
427 | dma->direction); | |
428 | dma->direction = DMA_NONE; | |
429 | } else { | |
95268403 | 430 | videobuf_dma_unmap(vbq->dev, videobuf_to_dma(vb)); |
39aee69a SA |
431 | videobuf_dma_free(videobuf_to_dma(vb)); |
432 | } | |
433 | ||
434 | vb->state = VIDEOBUF_NEEDS_INIT; | |
435 | } | |
436 | ||
437 | /* | |
438 | * Limit the number of available kernel image capture buffers based on the | |
439 | * number requested, the currently selected image size, and the maximum | |
440 | * amount of memory permitted for kernel capture buffers. | |
441 | */ | |
442 | static int omap24xxcam_vbq_setup(struct videobuf_queue *vbq, unsigned int *cnt, | |
443 | unsigned int *size) | |
444 | { | |
445 | struct omap24xxcam_fh *fh = vbq->priv_data; | |
446 | ||
447 | if (*cnt <= 0) | |
448 | *cnt = VIDEO_MAX_FRAME; /* supply a default number of buffers */ | |
449 | ||
450 | if (*cnt > VIDEO_MAX_FRAME) | |
451 | *cnt = VIDEO_MAX_FRAME; | |
452 | ||
453 | *size = fh->pix.sizeimage; | |
454 | ||
455 | /* accessing fh->cam->capture_mem is ok, it's constant */ | |
dab7e310 AB |
456 | if (*size * *cnt > fh->cam->capture_mem) |
457 | *cnt = fh->cam->capture_mem / *size; | |
39aee69a SA |
458 | |
459 | return 0; | |
460 | } | |
461 | ||
462 | static int omap24xxcam_dma_iolock(struct videobuf_queue *vbq, | |
463 | struct videobuf_dmabuf *dma) | |
464 | { | |
465 | int err = 0; | |
466 | ||
467 | dma->direction = PCI_DMA_FROMDEVICE; | |
468 | if (!dma_map_sg(vbq->dev, dma->sglist, dma->sglen, dma->direction)) { | |
469 | kfree(dma->sglist); | |
470 | dma->sglist = NULL; | |
471 | dma->sglen = 0; | |
472 | err = -EIO; | |
473 | } | |
474 | ||
475 | return err; | |
476 | } | |
477 | ||
478 | static int omap24xxcam_vbq_prepare(struct videobuf_queue *vbq, | |
479 | struct videobuf_buffer *vb, | |
480 | enum v4l2_field field) | |
481 | { | |
482 | struct omap24xxcam_fh *fh = vbq->priv_data; | |
483 | int err = 0; | |
484 | ||
485 | /* | |
486 | * Accessing pix here is okay since it's constant while | |
487 | * streaming is on (and we only get called then). | |
488 | */ | |
489 | if (vb->baddr) { | |
490 | /* This is a userspace buffer. */ | |
491 | if (fh->pix.sizeimage > vb->bsize) { | |
492 | /* The buffer isn't big enough. */ | |
493 | err = -EINVAL; | |
494 | } else | |
495 | vb->size = fh->pix.sizeimage; | |
496 | } else { | |
497 | if (vb->state != VIDEOBUF_NEEDS_INIT) { | |
498 | /* | |
499 | * We have a kernel bounce buffer that has | |
500 | * already been allocated. | |
501 | */ | |
502 | if (fh->pix.sizeimage > vb->size) { | |
503 | /* | |
504 | * The image size has been changed to | |
505 | * a larger size since this buffer was | |
506 | * allocated, so we need to free and | |
507 | * reallocate it. | |
508 | */ | |
509 | omap24xxcam_vbq_release(vbq, vb); | |
510 | vb->size = fh->pix.sizeimage; | |
511 | } | |
512 | } else { | |
513 | /* We need to allocate a new kernel bounce buffer. */ | |
514 | vb->size = fh->pix.sizeimage; | |
515 | } | |
516 | } | |
517 | ||
518 | if (err) | |
519 | return err; | |
520 | ||
521 | vb->width = fh->pix.width; | |
522 | vb->height = fh->pix.height; | |
523 | vb->field = field; | |
524 | ||
525 | if (vb->state == VIDEOBUF_NEEDS_INIT) { | |
526 | if (vb->memory == V4L2_MEMORY_MMAP) | |
527 | /* | |
528 | * we have built the scatter-gather list by ourself so | |
529 | * do the scatter-gather mapping as well | |
530 | */ | |
531 | err = omap24xxcam_dma_iolock(vbq, videobuf_to_dma(vb)); | |
532 | else | |
533 | err = videobuf_iolock(vbq, vb, NULL); | |
534 | } | |
535 | ||
536 | if (!err) | |
537 | vb->state = VIDEOBUF_PREPARED; | |
538 | else | |
539 | omap24xxcam_vbq_release(vbq, vb); | |
540 | ||
541 | return err; | |
542 | } | |
543 | ||
544 | static void omap24xxcam_vbq_queue(struct videobuf_queue *vbq, | |
545 | struct videobuf_buffer *vb) | |
546 | { | |
547 | struct omap24xxcam_fh *fh = vbq->priv_data; | |
548 | struct omap24xxcam_device *cam = fh->cam; | |
549 | enum videobuf_state state = vb->state; | |
550 | unsigned long flags; | |
551 | int err; | |
552 | ||
553 | /* | |
554 | * FIXME: We're marking the buffer active since we have no | |
555 | * pretty way of marking it active exactly when the | |
556 | * scatter-gather transfer starts. | |
557 | */ | |
558 | vb->state = VIDEOBUF_ACTIVE; | |
559 | ||
560 | err = omap24xxcam_sgdma_queue(&fh->cam->sgdma, | |
561 | videobuf_to_dma(vb)->sglist, | |
562 | videobuf_to_dma(vb)->sglen, vb->size, | |
563 | omap24xxcam_vbq_complete, vb); | |
564 | ||
565 | if (!err) { | |
566 | spin_lock_irqsave(&cam->core_enable_disable_lock, flags); | |
567 | if (++cam->sgdma_in_queue == 1 | |
568 | && !atomic_read(&cam->in_reset)) | |
569 | omap24xxcam_core_enable(cam); | |
570 | spin_unlock_irqrestore(&cam->core_enable_disable_lock, flags); | |
571 | } else { | |
572 | /* | |
573 | * Oops. We're not supposed to get any errors here. | |
574 | * The only way we could get an error is if we ran out | |
575 | * of scatter-gather DMA slots, but we are supposed to | |
576 | * have at least as many scatter-gather DMA slots as | |
577 | * video buffers so that can't happen. | |
578 | */ | |
579 | dev_err(cam->dev, "failed to queue a video buffer for dma!\n"); | |
580 | dev_err(cam->dev, "likely a bug in the driver!\n"); | |
581 | vb->state = state; | |
582 | } | |
583 | } | |
584 | ||
585 | static struct videobuf_queue_ops omap24xxcam_vbq_ops = { | |
586 | .buf_setup = omap24xxcam_vbq_setup, | |
587 | .buf_prepare = omap24xxcam_vbq_prepare, | |
588 | .buf_queue = omap24xxcam_vbq_queue, | |
589 | .buf_release = omap24xxcam_vbq_release, | |
590 | }; | |
591 | ||
592 | /* | |
593 | * | |
594 | * OMAP main camera system | |
595 | * | |
596 | */ | |
597 | ||
598 | /* | |
599 | * Reset camera block to power-on state. | |
600 | */ | |
601 | static void omap24xxcam_poweron_reset(struct omap24xxcam_device *cam) | |
602 | { | |
603 | int max_loop = RESET_TIMEOUT_NS; | |
604 | ||
605 | /* Reset whole camera subsystem */ | |
606 | omap24xxcam_reg_out(cam->mmio_base, | |
607 | CAM_SYSCONFIG, | |
608 | CAM_SYSCONFIG_SOFTRESET); | |
609 | ||
610 | /* Wait till it's finished */ | |
611 | while (!(omap24xxcam_reg_in(cam->mmio_base, CAM_SYSSTATUS) | |
612 | & CAM_SYSSTATUS_RESETDONE) | |
613 | && --max_loop) { | |
614 | ndelay(1); | |
615 | } | |
616 | ||
617 | if (!(omap24xxcam_reg_in(cam->mmio_base, CAM_SYSSTATUS) | |
618 | & CAM_SYSSTATUS_RESETDONE)) | |
619 | dev_err(cam->dev, "camera soft reset timeout\n"); | |
620 | } | |
621 | ||
622 | /* | |
623 | * (Re)initialise the camera block. | |
624 | */ | |
625 | static void omap24xxcam_hwinit(struct omap24xxcam_device *cam) | |
626 | { | |
627 | omap24xxcam_poweron_reset(cam); | |
628 | ||
629 | /* set the camera subsystem autoidle bit */ | |
630 | omap24xxcam_reg_out(cam->mmio_base, CAM_SYSCONFIG, | |
631 | CAM_SYSCONFIG_AUTOIDLE); | |
632 | ||
633 | /* set the camera MMU autoidle bit */ | |
634 | omap24xxcam_reg_out(cam->mmio_base, | |
635 | CAMMMU_REG_OFFSET + CAMMMU_SYSCONFIG, | |
636 | CAMMMU_SYSCONFIG_AUTOIDLE); | |
637 | ||
638 | omap24xxcam_core_hwinit(cam); | |
639 | ||
640 | omap24xxcam_dma_hwinit(&cam->sgdma.dma); | |
641 | } | |
642 | ||
643 | /* | |
644 | * Callback for dma transfer stalling. | |
645 | */ | |
646 | static void omap24xxcam_stalled_dma_reset(unsigned long data) | |
647 | { | |
648 | struct omap24xxcam_device *cam = (struct omap24xxcam_device *)data; | |
649 | ||
650 | if (!atomic_read(&cam->in_reset)) { | |
651 | dev_dbg(cam->dev, "dma stalled, resetting camera\n"); | |
652 | omap24xxcam_reset(cam); | |
653 | } | |
654 | } | |
655 | ||
656 | /* | |
657 | * Stop capture. Mark we're doing a reset, stop DMA transfers and | |
658 | * core. (No new scatter-gather transfers will be queued whilst | |
659 | * in_reset is non-zero.) | |
660 | * | |
661 | * If omap24xxcam_capture_stop is called from several places at | |
662 | * once, only the first call will have an effect. Similarly, the last | |
663 | * call omap24xxcam_streaming_cont will have effect. | |
664 | * | |
665 | * Serialisation is ensured by using cam->core_enable_disable_lock. | |
666 | */ | |
667 | static void omap24xxcam_capture_stop(struct omap24xxcam_device *cam) | |
668 | { | |
669 | unsigned long flags; | |
670 | ||
671 | spin_lock_irqsave(&cam->core_enable_disable_lock, flags); | |
672 | ||
673 | if (atomic_inc_return(&cam->in_reset) != 1) { | |
674 | spin_unlock_irqrestore(&cam->core_enable_disable_lock, flags); | |
675 | return; | |
676 | } | |
677 | ||
678 | omap24xxcam_core_disable(cam); | |
679 | ||
680 | spin_unlock_irqrestore(&cam->core_enable_disable_lock, flags); | |
681 | ||
682 | omap24xxcam_sgdma_sync(&cam->sgdma); | |
683 | } | |
684 | ||
685 | /* | |
686 | * Reset and continue streaming. | |
687 | * | |
688 | * Note: Resetting the camera FIFO via the CC_RST bit in the CC_CTRL | |
689 | * register is supposed to be sufficient to recover from a camera | |
690 | * interface error, but it doesn't seem to be enough. If we only do | |
691 | * that then subsequent image captures are out of sync by either one | |
692 | * or two times DMA_THRESHOLD bytes. Resetting and re-initializing the | |
693 | * entire camera subsystem prevents the problem with frame | |
694 | * synchronization. | |
695 | */ | |
696 | static void omap24xxcam_capture_cont(struct omap24xxcam_device *cam) | |
697 | { | |
698 | unsigned long flags; | |
699 | ||
700 | spin_lock_irqsave(&cam->core_enable_disable_lock, flags); | |
701 | ||
702 | if (atomic_read(&cam->in_reset) != 1) | |
703 | goto out; | |
704 | ||
705 | omap24xxcam_hwinit(cam); | |
706 | ||
707 | omap24xxcam_sensor_if_enable(cam); | |
708 | ||
709 | omap24xxcam_sgdma_process(&cam->sgdma); | |
710 | ||
711 | if (cam->sgdma_in_queue) | |
712 | omap24xxcam_core_enable(cam); | |
713 | ||
714 | out: | |
715 | atomic_dec(&cam->in_reset); | |
716 | spin_unlock_irqrestore(&cam->core_enable_disable_lock, flags); | |
717 | } | |
718 | ||
719 | static ssize_t | |
720 | omap24xxcam_streaming_show(struct device *dev, struct device_attribute *attr, | |
721 | char *buf) | |
722 | { | |
723 | struct omap24xxcam_device *cam = dev_get_drvdata(dev); | |
724 | ||
725 | return sprintf(buf, "%s\n", cam->streaming ? "active" : "inactive"); | |
726 | } | |
727 | static DEVICE_ATTR(streaming, S_IRUGO, omap24xxcam_streaming_show, NULL); | |
728 | ||
729 | /* | |
730 | * Stop capture and restart it. I.e. reset the camera during use. | |
731 | */ | |
732 | static void omap24xxcam_reset(struct omap24xxcam_device *cam) | |
733 | { | |
734 | omap24xxcam_capture_stop(cam); | |
735 | omap24xxcam_capture_cont(cam); | |
736 | } | |
737 | ||
738 | /* | |
739 | * The main interrupt handler. | |
740 | */ | |
741 | static irqreturn_t omap24xxcam_isr(int irq, void *arg) | |
742 | { | |
743 | struct omap24xxcam_device *cam = (struct omap24xxcam_device *)arg; | |
744 | u32 irqstatus; | |
745 | unsigned int irqhandled = 0; | |
746 | ||
747 | irqstatus = omap24xxcam_reg_in(cam->mmio_base, CAM_IRQSTATUS); | |
748 | ||
749 | if (irqstatus & | |
750 | (CAM_IRQSTATUS_DMA_IRQ2 | CAM_IRQSTATUS_DMA_IRQ1 | |
751 | | CAM_IRQSTATUS_DMA_IRQ0)) { | |
752 | omap24xxcam_dma_isr(&cam->sgdma.dma); | |
753 | irqhandled = 1; | |
754 | } | |
755 | if (irqstatus & CAM_IRQSTATUS_CC_IRQ) { | |
756 | omap24xxcam_core_isr(cam); | |
757 | irqhandled = 1; | |
758 | } | |
759 | if (irqstatus & CAM_IRQSTATUS_MMU_IRQ) | |
760 | dev_err(cam->dev, "unhandled camera MMU interrupt!\n"); | |
761 | ||
762 | return IRQ_RETVAL(irqhandled); | |
763 | } | |
764 | ||
765 | /* | |
766 | * | |
767 | * Sensor handling. | |
768 | * | |
769 | */ | |
770 | ||
771 | /* | |
772 | * Enable the external sensor interface. Try to negotiate interface | |
773 | * parameters with the sensor and start using the new ones. The calls | |
774 | * to sensor_if_enable and sensor_if_disable need not to be balanced. | |
775 | */ | |
776 | static int omap24xxcam_sensor_if_enable(struct omap24xxcam_device *cam) | |
777 | { | |
778 | int rval; | |
779 | struct v4l2_ifparm p; | |
780 | ||
781 | rval = vidioc_int_g_ifparm(cam->sdev, &p); | |
782 | if (rval) { | |
783 | dev_err(cam->dev, "vidioc_int_g_ifparm failed with %d\n", rval); | |
784 | return rval; | |
785 | } | |
786 | ||
787 | cam->if_type = p.if_type; | |
788 | ||
789 | cam->cc_ctrl = CC_CTRL_CC_EN; | |
790 | ||
791 | switch (p.if_type) { | |
792 | case V4L2_IF_TYPE_BT656: | |
793 | if (p.u.bt656.frame_start_on_rising_vs) | |
794 | cam->cc_ctrl |= CC_CTRL_NOBT_SYNCHRO; | |
795 | if (p.u.bt656.bt_sync_correct) | |
796 | cam->cc_ctrl |= CC_CTRL_BT_CORRECT; | |
797 | if (p.u.bt656.swap) | |
798 | cam->cc_ctrl |= CC_CTRL_PAR_ORDERCAM; | |
799 | if (p.u.bt656.latch_clk_inv) | |
800 | cam->cc_ctrl |= CC_CTRL_PAR_CLK_POL; | |
801 | if (p.u.bt656.nobt_hs_inv) | |
802 | cam->cc_ctrl |= CC_CTRL_NOBT_HS_POL; | |
803 | if (p.u.bt656.nobt_vs_inv) | |
804 | cam->cc_ctrl |= CC_CTRL_NOBT_VS_POL; | |
805 | ||
806 | switch (p.u.bt656.mode) { | |
807 | case V4L2_IF_TYPE_BT656_MODE_NOBT_8BIT: | |
808 | cam->cc_ctrl |= CC_CTRL_PAR_MODE_NOBT8; | |
809 | break; | |
810 | case V4L2_IF_TYPE_BT656_MODE_NOBT_10BIT: | |
811 | cam->cc_ctrl |= CC_CTRL_PAR_MODE_NOBT10; | |
812 | break; | |
813 | case V4L2_IF_TYPE_BT656_MODE_NOBT_12BIT: | |
814 | cam->cc_ctrl |= CC_CTRL_PAR_MODE_NOBT12; | |
815 | break; | |
816 | case V4L2_IF_TYPE_BT656_MODE_BT_8BIT: | |
817 | cam->cc_ctrl |= CC_CTRL_PAR_MODE_BT8; | |
818 | break; | |
819 | case V4L2_IF_TYPE_BT656_MODE_BT_10BIT: | |
820 | cam->cc_ctrl |= CC_CTRL_PAR_MODE_BT10; | |
821 | break; | |
822 | default: | |
823 | dev_err(cam->dev, | |
824 | "bt656 interface mode %d not supported\n", | |
825 | p.u.bt656.mode); | |
826 | return -EINVAL; | |
827 | } | |
828 | /* | |
829 | * The clock rate that the sensor wants has changed. | |
830 | * We have to adjust the xclk from OMAP 2 side to | |
831 | * match the sensor's wish as closely as possible. | |
832 | */ | |
833 | if (p.u.bt656.clock_curr != cam->if_u.bt656.xclk) { | |
834 | u32 xclk = p.u.bt656.clock_curr; | |
835 | u32 divisor; | |
836 | ||
837 | if (xclk == 0) | |
838 | return -EINVAL; | |
839 | ||
840 | if (xclk > CAM_MCLK) | |
841 | xclk = CAM_MCLK; | |
842 | ||
843 | divisor = CAM_MCLK / xclk; | |
844 | if (divisor * xclk < CAM_MCLK) | |
845 | divisor++; | |
846 | if (CAM_MCLK / divisor < p.u.bt656.clock_min | |
847 | && divisor > 1) | |
848 | divisor--; | |
849 | if (divisor > 30) | |
850 | divisor = 30; | |
851 | ||
852 | xclk = CAM_MCLK / divisor; | |
853 | ||
854 | if (xclk < p.u.bt656.clock_min | |
855 | || xclk > p.u.bt656.clock_max) | |
856 | return -EINVAL; | |
857 | ||
858 | cam->if_u.bt656.xclk = xclk; | |
859 | } | |
860 | omap24xxcam_core_xclk_set(cam, cam->if_u.bt656.xclk); | |
861 | break; | |
862 | default: | |
863 | /* FIXME: how about other interfaces? */ | |
864 | dev_err(cam->dev, "interface type %d not supported\n", | |
865 | p.if_type); | |
866 | return -EINVAL; | |
867 | } | |
868 | ||
869 | return 0; | |
870 | } | |
871 | ||
872 | static void omap24xxcam_sensor_if_disable(const struct omap24xxcam_device *cam) | |
873 | { | |
874 | switch (cam->if_type) { | |
875 | case V4L2_IF_TYPE_BT656: | |
876 | omap24xxcam_core_xclk_set(cam, 0); | |
877 | break; | |
878 | } | |
879 | } | |
880 | ||
881 | /* | |
882 | * Initialise the sensor hardware. | |
883 | */ | |
884 | static int omap24xxcam_sensor_init(struct omap24xxcam_device *cam) | |
885 | { | |
886 | int err = 0; | |
887 | struct v4l2_int_device *sdev = cam->sdev; | |
888 | ||
889 | omap24xxcam_clock_on(cam); | |
890 | err = omap24xxcam_sensor_if_enable(cam); | |
891 | if (err) { | |
892 | dev_err(cam->dev, "sensor interface could not be enabled at " | |
893 | "initialisation, %d\n", err); | |
894 | cam->sdev = NULL; | |
895 | goto out; | |
896 | } | |
897 | ||
898 | /* power up sensor during sensor initialization */ | |
899 | vidioc_int_s_power(sdev, 1); | |
900 | ||
901 | err = vidioc_int_dev_init(sdev); | |
902 | if (err) { | |
903 | dev_err(cam->dev, "cannot initialize sensor, error %d\n", err); | |
904 | /* Sensor init failed --- it's nonexistent to us! */ | |
905 | cam->sdev = NULL; | |
906 | goto out; | |
907 | } | |
908 | ||
909 | dev_info(cam->dev, "sensor is %s\n", sdev->name); | |
910 | ||
911 | out: | |
912 | omap24xxcam_sensor_if_disable(cam); | |
913 | omap24xxcam_clock_off(cam); | |
914 | ||
915 | vidioc_int_s_power(sdev, 0); | |
916 | ||
917 | return err; | |
918 | } | |
919 | ||
920 | static void omap24xxcam_sensor_exit(struct omap24xxcam_device *cam) | |
921 | { | |
922 | if (cam->sdev) | |
923 | vidioc_int_dev_exit(cam->sdev); | |
924 | } | |
925 | ||
926 | static void omap24xxcam_sensor_disable(struct omap24xxcam_device *cam) | |
927 | { | |
928 | omap24xxcam_sensor_if_disable(cam); | |
929 | omap24xxcam_clock_off(cam); | |
930 | vidioc_int_s_power(cam->sdev, 0); | |
931 | } | |
932 | ||
933 | /* | |
934 | * Power-up and configure camera sensor. It's ready for capturing now. | |
935 | */ | |
936 | static int omap24xxcam_sensor_enable(struct omap24xxcam_device *cam) | |
937 | { | |
938 | int rval; | |
939 | ||
940 | omap24xxcam_clock_on(cam); | |
941 | ||
942 | omap24xxcam_sensor_if_enable(cam); | |
943 | ||
944 | rval = vidioc_int_s_power(cam->sdev, 1); | |
945 | if (rval) | |
946 | goto out; | |
947 | ||
948 | rval = vidioc_int_init(cam->sdev); | |
949 | if (rval) | |
950 | goto out; | |
951 | ||
952 | return 0; | |
953 | ||
954 | out: | |
955 | omap24xxcam_sensor_disable(cam); | |
956 | ||
957 | return rval; | |
958 | } | |
959 | ||
960 | static void omap24xxcam_sensor_reset_work(struct work_struct *work) | |
961 | { | |
962 | struct omap24xxcam_device *cam = | |
963 | container_of(work, struct omap24xxcam_device, | |
964 | sensor_reset_work); | |
965 | ||
966 | if (atomic_read(&cam->reset_disable)) | |
967 | return; | |
968 | ||
969 | omap24xxcam_capture_stop(cam); | |
970 | ||
971 | if (vidioc_int_reset(cam->sdev) == 0) { | |
972 | vidioc_int_init(cam->sdev); | |
973 | } else { | |
974 | /* Can't reset it by vidioc_int_reset. */ | |
975 | omap24xxcam_sensor_disable(cam); | |
976 | omap24xxcam_sensor_enable(cam); | |
977 | } | |
978 | ||
979 | omap24xxcam_capture_cont(cam); | |
980 | } | |
981 | ||
982 | /* | |
983 | * | |
984 | * IOCTL interface. | |
985 | * | |
986 | */ | |
987 | ||
988 | static int vidioc_querycap(struct file *file, void *fh, | |
989 | struct v4l2_capability *cap) | |
990 | { | |
991 | struct omap24xxcam_fh *ofh = fh; | |
992 | struct omap24xxcam_device *cam = ofh->cam; | |
993 | ||
994 | strlcpy(cap->driver, CAM_NAME, sizeof(cap->driver)); | |
995 | strlcpy(cap->card, cam->vfd->name, sizeof(cap->card)); | |
39aee69a SA |
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 | ||
8c71778c | 1201 | flush_work_sync(&cam->sensor_reset_work); |
39aee69a SA |
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; | |
2132deff | 1408 | for (i = first; i <= last && i < VIDEO_MAX_FRAME; i++) { |
39aee69a SA |
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, | |
e3cfd447 | 1494 | sizeof(struct videobuf_buffer), fh, NULL); |
39aee69a SA |
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 | ||
8c71778c | 1515 | flush_work_sync(&cam->sensor_reset_work); |
39aee69a SA |
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 | */ | |
8c71778c | 1539 | flush_work_sync(&cam->sensor_reset_work); |
39aee69a SA |
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 | } | |
28f65c11 | 1770 | if (!request_mem_region(mem->start, resource_size(mem), pdev->name)) { |
39aee69a SA |
1771 | dev_err(cam->dev, |
1772 | "cannot reserve camera register I/O region\n"); | |
1773 | goto err; | |
1774 | } | |
1775 | cam->mmio_base_phys = mem->start; | |
28f65c11 | 1776 | cam->mmio_size = resource_size(mem); |
39aee69a SA |
1777 | |
1778 | /* map the region */ | |
d0f8dfc6 | 1779 | cam->mmio_base = ioremap_nocache(cam->mmio_base_phys, cam->mmio_size); |
39aee69a SA |
1780 | if (!cam->mmio_base) { |
1781 | dev_err(cam->dev, "cannot map camera register I/O region\n"); | |
1782 | goto err; | |
1783 | } | |
1784 | ||
1785 | irq = platform_get_irq(pdev, 0); | |
1786 | if (irq <= 0) { | |
1787 | dev_err(cam->dev, "no irq for camera?\n"); | |
1788 | goto err; | |
1789 | } | |
1790 | ||
1791 | /* install the interrupt service routine */ | |
1792 | if (request_irq(irq, omap24xxcam_isr, 0, CAM_NAME, cam)) { | |
1793 | dev_err(cam->dev, | |
1794 | "could not install interrupt service routine\n"); | |
1795 | goto err; | |
1796 | } | |
1797 | cam->irq = irq; | |
1798 | ||
1799 | if (omap24xxcam_clock_get(cam)) | |
1800 | goto err; | |
1801 | ||
1802 | INIT_WORK(&cam->sensor_reset_work, omap24xxcam_sensor_reset_work); | |
1803 | ||
1804 | mutex_init(&cam->mutex); | |
1805 | spin_lock_init(&cam->core_enable_disable_lock); | |
1806 | ||
1807 | omap24xxcam_sgdma_init(&cam->sgdma, | |
1808 | cam->mmio_base + CAMDMA_REG_OFFSET, | |
1809 | omap24xxcam_stalled_dma_reset, | |
1810 | (unsigned long)cam); | |
1811 | ||
1812 | omap24xxcam.priv = cam; | |
1813 | ||
1814 | if (v4l2_int_device_register(&omap24xxcam)) | |
1815 | goto err; | |
1816 | ||
1817 | return 0; | |
1818 | ||
1819 | err: | |
1820 | omap24xxcam_remove(pdev); | |
1821 | return -ENODEV; | |
1822 | } | |
1823 | ||
1824 | static int omap24xxcam_remove(struct platform_device *pdev) | |
1825 | { | |
1826 | struct omap24xxcam_device *cam = platform_get_drvdata(pdev); | |
1827 | ||
1828 | if (!cam) | |
1829 | return 0; | |
1830 | ||
1831 | if (omap24xxcam.priv != NULL) | |
1832 | v4l2_int_device_unregister(&omap24xxcam); | |
1833 | omap24xxcam.priv = NULL; | |
1834 | ||
1835 | omap24xxcam_clock_put(cam); | |
1836 | ||
1837 | if (cam->irq) { | |
1838 | free_irq(cam->irq, cam); | |
1839 | cam->irq = 0; | |
1840 | } | |
1841 | ||
1842 | if (cam->mmio_base) { | |
1843 | iounmap((void *)cam->mmio_base); | |
1844 | cam->mmio_base = 0; | |
1845 | } | |
1846 | ||
1847 | if (cam->mmio_base_phys) { | |
1848 | release_mem_region(cam->mmio_base_phys, cam->mmio_size); | |
1849 | cam->mmio_base_phys = 0; | |
1850 | } | |
1851 | ||
1852 | kfree(cam); | |
1853 | ||
1854 | return 0; | |
1855 | } | |
1856 | ||
1857 | static struct platform_driver omap24xxcam_driver = { | |
1858 | .probe = omap24xxcam_probe, | |
1859 | .remove = omap24xxcam_remove, | |
1860 | #ifdef CONFIG_PM | |
1861 | .suspend = omap24xxcam_suspend, | |
1862 | .resume = omap24xxcam_resume, | |
1863 | #endif | |
1864 | .driver = { | |
1865 | .name = CAM_NAME, | |
1866 | .owner = THIS_MODULE, | |
1867 | }, | |
1868 | }; | |
1869 | ||
1d6629b1 | 1870 | module_platform_driver(omap24xxcam_driver); |
39aee69a SA |
1871 | |
1872 | MODULE_AUTHOR("Sakari Ailus <sakari.ailus@nokia.com>"); | |
1873 | MODULE_DESCRIPTION("OMAP24xx Video for Linux camera driver"); | |
1874 | MODULE_LICENSE("GPL"); | |
64dc3c1a | 1875 | MODULE_VERSION(OMAP24XXCAM_VERSION); |
39aee69a SA |
1876 | module_param(video_nr, int, 0); |
1877 | MODULE_PARM_DESC(video_nr, | |
1878 | "Minor number for video device (-1 ==> auto assign)"); | |
1879 | module_param(capture_mem, int, 0); | |
1880 | MODULE_PARM_DESC(capture_mem, "Maximum amount of memory for capture " | |
1881 | "buffers (default 4800kiB)"); |