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3bc43840 GL |
1 | /* |
2 | * V4L2 Driver for PXA camera host | |
3 | * | |
4 | * Copyright (C) 2006, Sascha Hauer, Pengutronix | |
5 | * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | */ | |
12 | ||
3bc43840 GL |
13 | #include <linux/init.h> |
14 | #include <linux/module.h> | |
7102b773 | 15 | #include <linux/io.h> |
3bc43840 GL |
16 | #include <linux/delay.h> |
17 | #include <linux/dma-mapping.h> | |
18 | #include <linux/errno.h> | |
19 | #include <linux/fs.h> | |
20 | #include <linux/interrupt.h> | |
21 | #include <linux/kernel.h> | |
22 | #include <linux/mm.h> | |
23 | #include <linux/moduleparam.h> | |
24 | #include <linux/time.h> | |
25 | #include <linux/version.h> | |
26 | #include <linux/device.h> | |
27 | #include <linux/platform_device.h> | |
28 | #include <linux/mutex.h> | |
29 | #include <linux/clk.h> | |
30 | ||
31 | #include <media/v4l2-common.h> | |
32 | #include <media/v4l2-dev.h> | |
092d3921 | 33 | #include <media/videobuf-dma-sg.h> |
3bc43840 GL |
34 | #include <media/soc_camera.h> |
35 | ||
36 | #include <linux/videodev2.h> | |
37 | ||
38 | #include <asm/dma.h> | |
39 | #include <asm/arch/pxa-regs.h> | |
40 | #include <asm/arch/camera.h> | |
41 | ||
42 | #define PXA_CAM_VERSION_CODE KERNEL_VERSION(0, 0, 5) | |
43 | #define PXA_CAM_DRV_NAME "pxa27x-camera" | |
44 | ||
7102b773 GL |
45 | #define CICR0_SIM_MP (0 << 24) |
46 | #define CICR0_SIM_SP (1 << 24) | |
47 | #define CICR0_SIM_MS (2 << 24) | |
48 | #define CICR0_SIM_EP (3 << 24) | |
49 | #define CICR0_SIM_ES (4 << 24) | |
50 | ||
51 | #define CICR1_DW_VAL(x) ((x) & CICR1_DW) /* Data bus width */ | |
52 | #define CICR1_PPL_VAL(x) (((x) << 15) & CICR1_PPL) /* Pixels per line */ | |
a5462e5b MR |
53 | #define CICR1_COLOR_SP_VAL(x) (((x) << 3) & CICR1_COLOR_SP) /* color space */ |
54 | #define CICR1_RGB_BPP_VAL(x) (((x) << 7) & CICR1_RGB_BPP) /* bpp for rgb */ | |
55 | #define CICR1_RGBT_CONV_VAL(x) (((x) << 29) & CICR1_RGBT_CONV) /* rgbt conv */ | |
7102b773 GL |
56 | |
57 | #define CICR2_BLW_VAL(x) (((x) << 24) & CICR2_BLW) /* Beginning-of-line pixel clock wait count */ | |
58 | #define CICR2_ELW_VAL(x) (((x) << 16) & CICR2_ELW) /* End-of-line pixel clock wait count */ | |
59 | #define CICR2_HSW_VAL(x) (((x) << 10) & CICR2_HSW) /* Horizontal sync pulse width */ | |
60 | #define CICR2_BFPW_VAL(x) (((x) << 3) & CICR2_BFPW) /* Beginning-of-frame pixel clock wait count */ | |
61 | #define CICR2_FSW_VAL(x) (((x) << 0) & CICR2_FSW) /* Frame stabilization wait count */ | |
62 | ||
63 | #define CICR3_BFW_VAL(x) (((x) << 24) & CICR3_BFW) /* Beginning-of-frame line clock wait count */ | |
64 | #define CICR3_EFW_VAL(x) (((x) << 16) & CICR3_EFW) /* End-of-frame line clock wait count */ | |
65 | #define CICR3_VSW_VAL(x) (((x) << 11) & CICR3_VSW) /* Vertical sync pulse width */ | |
66 | #define CICR3_LPF_VAL(x) (((x) << 0) & CICR3_LPF) /* Lines per frame */ | |
67 | ||
3bc43840 GL |
68 | #define CICR0_IRQ_MASK (CICR0_TOM | CICR0_RDAVM | CICR0_FEM | CICR0_EOLM | \ |
69 | CICR0_PERRM | CICR0_QDM | CICR0_CDM | CICR0_SOFM | \ | |
70 | CICR0_EOFM | CICR0_FOM) | |
71 | ||
72 | static DEFINE_MUTEX(camera_lock); | |
73 | ||
74 | /* | |
75 | * Structures | |
76 | */ | |
a5462e5b MR |
77 | enum pxa_camera_active_dma { |
78 | DMA_Y = 0x1, | |
79 | DMA_U = 0x2, | |
80 | DMA_V = 0x4, | |
81 | }; | |
82 | ||
83 | /* descriptor needed for the PXA DMA engine */ | |
84 | struct pxa_cam_dma { | |
85 | dma_addr_t sg_dma; | |
86 | struct pxa_dma_desc *sg_cpu; | |
87 | size_t sg_size; | |
88 | int sglen; | |
89 | }; | |
3bc43840 GL |
90 | |
91 | /* buffer for one video frame */ | |
92 | struct pxa_buffer { | |
93 | /* common v4l buffer stuff -- must be first */ | |
94 | struct videobuf_buffer vb; | |
95 | ||
96 | const struct soc_camera_data_format *fmt; | |
97 | ||
a5462e5b MR |
98 | /* our descriptor lists for Y, U and V channels */ |
99 | struct pxa_cam_dma dmas[3]; | |
100 | ||
3bc43840 | 101 | int inwork; |
a5462e5b MR |
102 | |
103 | enum pxa_camera_active_dma active_dma; | |
3bc43840 GL |
104 | }; |
105 | ||
3bc43840 GL |
106 | struct pxa_camera_dev { |
107 | struct device *dev; | |
108 | /* PXA27x is only supposed to handle one camera on its Quick Capture | |
109 | * interface. If anyone ever builds hardware to enable more than | |
110 | * one camera, they will have to modify this driver too */ | |
111 | struct soc_camera_device *icd; | |
112 | struct clk *clk; | |
113 | ||
114 | unsigned int irq; | |
115 | void __iomem *base; | |
a5462e5b | 116 | |
e7c50688 | 117 | int channels; |
a5462e5b | 118 | unsigned int dma_chans[3]; |
3bc43840 | 119 | |
3bc43840 GL |
120 | struct pxacamera_platform_data *pdata; |
121 | struct resource *res; | |
122 | unsigned long platform_flags; | |
123 | unsigned long platform_mclk_10khz; | |
124 | ||
125 | struct list_head capture; | |
126 | ||
127 | spinlock_t lock; | |
128 | ||
3bc43840 | 129 | struct pxa_buffer *active; |
5aa2110f | 130 | struct pxa_dma_desc *sg_tail[3]; |
3bc43840 GL |
131 | }; |
132 | ||
133 | static const char *pxa_cam_driver_description = "PXA_Camera"; | |
134 | ||
135 | static unsigned int vid_limit = 16; /* Video memory limit, in Mb */ | |
136 | ||
137 | /* | |
138 | * Videobuf operations | |
139 | */ | |
7102b773 GL |
140 | static int pxa_videobuf_setup(struct videobuf_queue *vq, unsigned int *count, |
141 | unsigned int *size) | |
3bc43840 GL |
142 | { |
143 | struct soc_camera_device *icd = vq->priv_data; | |
5aa2110f GL |
144 | struct soc_camera_host *ici = |
145 | to_soc_camera_host(icd->dev.parent); | |
146 | struct pxa_camera_dev *pcdev = ici->priv; | |
3bc43840 GL |
147 | |
148 | dev_dbg(&icd->dev, "count=%d, size=%d\n", *count, *size); | |
149 | ||
a5462e5b | 150 | /* planar capture requires Y, U and V buffers to be page aligned */ |
5aa2110f | 151 | if (pcdev->channels == 3) { |
a5462e5b MR |
152 | *size = PAGE_ALIGN(icd->width * icd->height); /* Y pages */ |
153 | *size += PAGE_ALIGN(icd->width * icd->height / 2); /* U pages */ | |
154 | *size += PAGE_ALIGN(icd->width * icd->height / 2); /* V pages */ | |
155 | } else { | |
156 | *size = icd->width * icd->height * | |
157 | ((icd->current_fmt->depth + 7) >> 3); | |
158 | } | |
3bc43840 GL |
159 | |
160 | if (0 == *count) | |
161 | *count = 32; | |
162 | while (*size * *count > vid_limit * 1024 * 1024) | |
163 | (*count)--; | |
164 | ||
165 | return 0; | |
166 | } | |
167 | ||
168 | static void free_buffer(struct videobuf_queue *vq, struct pxa_buffer *buf) | |
169 | { | |
170 | struct soc_camera_device *icd = vq->priv_data; | |
171 | struct soc_camera_host *ici = | |
172 | to_soc_camera_host(icd->dev.parent); | |
173 | struct pxa_camera_dev *pcdev = ici->priv; | |
174 | struct videobuf_dmabuf *dma = videobuf_to_dma(&buf->vb); | |
a5462e5b | 175 | int i; |
3bc43840 GL |
176 | |
177 | BUG_ON(in_interrupt()); | |
178 | ||
7e28adb2 | 179 | dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__, |
3bc43840 GL |
180 | &buf->vb, buf->vb.baddr, buf->vb.bsize); |
181 | ||
182 | /* This waits until this buffer is out of danger, i.e., until it is no | |
183 | * longer in STATE_QUEUED or STATE_ACTIVE */ | |
184 | videobuf_waiton(&buf->vb, 0, 0); | |
185 | videobuf_dma_unmap(vq, dma); | |
186 | videobuf_dma_free(dma); | |
187 | ||
a5462e5b MR |
188 | for (i = 0; i < ARRAY_SIZE(buf->dmas); i++) { |
189 | if (buf->dmas[i].sg_cpu) | |
190 | dma_free_coherent(pcdev->dev, buf->dmas[i].sg_size, | |
191 | buf->dmas[i].sg_cpu, | |
192 | buf->dmas[i].sg_dma); | |
193 | buf->dmas[i].sg_cpu = NULL; | |
194 | } | |
3bc43840 GL |
195 | |
196 | buf->vb.state = VIDEOBUF_NEEDS_INIT; | |
197 | } | |
198 | ||
a5462e5b MR |
199 | static int pxa_init_dma_channel(struct pxa_camera_dev *pcdev, |
200 | struct pxa_buffer *buf, | |
201 | struct videobuf_dmabuf *dma, int channel, | |
202 | int sglen, int sg_start, int cibr, | |
203 | unsigned int size) | |
204 | { | |
205 | struct pxa_cam_dma *pxa_dma = &buf->dmas[channel]; | |
206 | int i; | |
207 | ||
208 | if (pxa_dma->sg_cpu) | |
209 | dma_free_coherent(pcdev->dev, pxa_dma->sg_size, | |
210 | pxa_dma->sg_cpu, pxa_dma->sg_dma); | |
211 | ||
212 | pxa_dma->sg_size = (sglen + 1) * sizeof(struct pxa_dma_desc); | |
213 | pxa_dma->sg_cpu = dma_alloc_coherent(pcdev->dev, pxa_dma->sg_size, | |
214 | &pxa_dma->sg_dma, GFP_KERNEL); | |
215 | if (!pxa_dma->sg_cpu) | |
216 | return -ENOMEM; | |
217 | ||
218 | pxa_dma->sglen = sglen; | |
219 | ||
220 | for (i = 0; i < sglen; i++) { | |
221 | int sg_i = sg_start + i; | |
222 | struct scatterlist *sg = dma->sglist; | |
223 | unsigned int dma_len = sg_dma_len(&sg[sg_i]), xfer_len; | |
224 | ||
225 | pxa_dma->sg_cpu[i].dsadr = pcdev->res->start + cibr; | |
226 | pxa_dma->sg_cpu[i].dtadr = sg_dma_address(&sg[sg_i]); | |
227 | ||
228 | /* PXA27x Developer's Manual 27.4.4.1: round up to 8 bytes */ | |
229 | xfer_len = (min(dma_len, size) + 7) & ~7; | |
230 | ||
231 | pxa_dma->sg_cpu[i].dcmd = | |
232 | DCMD_FLOWSRC | DCMD_BURST8 | DCMD_INCTRGADDR | xfer_len; | |
233 | size -= dma_len; | |
234 | pxa_dma->sg_cpu[i].ddadr = | |
235 | pxa_dma->sg_dma + (i + 1) * sizeof(struct pxa_dma_desc); | |
236 | } | |
237 | ||
238 | pxa_dma->sg_cpu[sglen - 1].ddadr = DDADR_STOP; | |
239 | pxa_dma->sg_cpu[sglen - 1].dcmd |= DCMD_ENDIRQEN; | |
240 | ||
241 | return 0; | |
242 | } | |
243 | ||
7102b773 GL |
244 | static int pxa_videobuf_prepare(struct videobuf_queue *vq, |
245 | struct videobuf_buffer *vb, enum v4l2_field field) | |
3bc43840 GL |
246 | { |
247 | struct soc_camera_device *icd = vq->priv_data; | |
248 | struct soc_camera_host *ici = | |
249 | to_soc_camera_host(icd->dev.parent); | |
250 | struct pxa_camera_dev *pcdev = ici->priv; | |
251 | struct pxa_buffer *buf = container_of(vb, struct pxa_buffer, vb); | |
a5462e5b MR |
252 | int ret; |
253 | int sglen_y, sglen_yu = 0, sglen_u = 0, sglen_v = 0; | |
254 | int size_y, size_u = 0, size_v = 0; | |
3bc43840 | 255 | |
7e28adb2 | 256 | dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__, |
3bc43840 GL |
257 | vb, vb->baddr, vb->bsize); |
258 | ||
259 | /* Added list head initialization on alloc */ | |
260 | WARN_ON(!list_empty(&vb->queue)); | |
261 | ||
262 | #ifdef DEBUG | |
263 | /* This can be useful if you want to see if we actually fill | |
264 | * the buffer with something */ | |
265 | memset((void *)vb->baddr, 0xaa, vb->bsize); | |
266 | #endif | |
267 | ||
268 | BUG_ON(NULL == icd->current_fmt); | |
269 | ||
270 | /* I think, in buf_prepare you only have to protect global data, | |
271 | * the actual buffer is yours */ | |
272 | buf->inwork = 1; | |
273 | ||
274 | if (buf->fmt != icd->current_fmt || | |
275 | vb->width != icd->width || | |
276 | vb->height != icd->height || | |
277 | vb->field != field) { | |
278 | buf->fmt = icd->current_fmt; | |
279 | vb->width = icd->width; | |
280 | vb->height = icd->height; | |
281 | vb->field = field; | |
282 | vb->state = VIDEOBUF_NEEDS_INIT; | |
283 | } | |
284 | ||
285 | vb->size = vb->width * vb->height * ((buf->fmt->depth + 7) >> 3); | |
286 | if (0 != vb->baddr && vb->bsize < vb->size) { | |
287 | ret = -EINVAL; | |
288 | goto out; | |
289 | } | |
290 | ||
291 | if (vb->state == VIDEOBUF_NEEDS_INIT) { | |
292 | unsigned int size = vb->size; | |
293 | struct videobuf_dmabuf *dma = videobuf_to_dma(vb); | |
294 | ||
295 | ret = videobuf_iolock(vq, vb, NULL); | |
296 | if (ret) | |
297 | goto fail; | |
298 | ||
5aa2110f | 299 | if (pcdev->channels == 3) { |
a5462e5b MR |
300 | /* FIXME the calculations should be more precise */ |
301 | sglen_y = dma->sglen / 2; | |
302 | sglen_u = sglen_v = dma->sglen / 4 + 1; | |
303 | sglen_yu = sglen_y + sglen_u; | |
304 | size_y = size / 2; | |
305 | size_u = size_v = size / 4; | |
306 | } else { | |
307 | sglen_y = dma->sglen; | |
308 | size_y = size; | |
309 | } | |
310 | ||
311 | /* init DMA for Y channel */ | |
312 | ret = pxa_init_dma_channel(pcdev, buf, dma, 0, sglen_y, | |
313 | 0, 0x28, size_y); | |
3bc43840 | 314 | |
a5462e5b MR |
315 | if (ret) { |
316 | dev_err(pcdev->dev, | |
317 | "DMA initialization for Y/RGB failed\n"); | |
3bc43840 GL |
318 | goto fail; |
319 | } | |
320 | ||
5aa2110f | 321 | if (pcdev->channels == 3) { |
a5462e5b MR |
322 | /* init DMA for U channel */ |
323 | ret = pxa_init_dma_channel(pcdev, buf, dma, 1, sglen_u, | |
324 | sglen_y, 0x30, size_u); | |
325 | if (ret) { | |
326 | dev_err(pcdev->dev, | |
327 | "DMA initialization for U failed\n"); | |
328 | goto fail_u; | |
329 | } | |
330 | ||
331 | /* init DMA for V channel */ | |
332 | ret = pxa_init_dma_channel(pcdev, buf, dma, 2, sglen_v, | |
333 | sglen_yu, 0x38, size_v); | |
334 | if (ret) { | |
335 | dev_err(pcdev->dev, | |
336 | "DMA initialization for V failed\n"); | |
337 | goto fail_v; | |
338 | } | |
3bc43840 | 339 | } |
3bc43840 GL |
340 | |
341 | vb->state = VIDEOBUF_PREPARED; | |
342 | } | |
343 | ||
344 | buf->inwork = 0; | |
a5462e5b | 345 | buf->active_dma = DMA_Y; |
5aa2110f | 346 | if (pcdev->channels == 3) |
a5462e5b | 347 | buf->active_dma |= DMA_U | DMA_V; |
3bc43840 GL |
348 | |
349 | return 0; | |
350 | ||
a5462e5b MR |
351 | fail_v: |
352 | dma_free_coherent(pcdev->dev, buf->dmas[1].sg_size, | |
353 | buf->dmas[1].sg_cpu, buf->dmas[1].sg_dma); | |
354 | fail_u: | |
355 | dma_free_coherent(pcdev->dev, buf->dmas[0].sg_size, | |
356 | buf->dmas[0].sg_cpu, buf->dmas[0].sg_dma); | |
3bc43840 GL |
357 | fail: |
358 | free_buffer(vq, buf); | |
359 | out: | |
360 | buf->inwork = 0; | |
361 | return ret; | |
362 | } | |
363 | ||
7102b773 GL |
364 | static void pxa_videobuf_queue(struct videobuf_queue *vq, |
365 | struct videobuf_buffer *vb) | |
3bc43840 GL |
366 | { |
367 | struct soc_camera_device *icd = vq->priv_data; | |
368 | struct soc_camera_host *ici = | |
369 | to_soc_camera_host(icd->dev.parent); | |
370 | struct pxa_camera_dev *pcdev = ici->priv; | |
371 | struct pxa_buffer *buf = container_of(vb, struct pxa_buffer, vb); | |
7102b773 | 372 | struct pxa_buffer *active; |
3bc43840 | 373 | unsigned long flags; |
5aa2110f | 374 | int i; |
3bc43840 | 375 | |
7e28adb2 | 376 | dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__, |
3bc43840 GL |
377 | vb, vb->baddr, vb->bsize); |
378 | spin_lock_irqsave(&pcdev->lock, flags); | |
379 | ||
380 | list_add_tail(&vb->queue, &pcdev->capture); | |
381 | ||
382 | vb->state = VIDEOBUF_ACTIVE; | |
7102b773 | 383 | active = pcdev->active; |
3bc43840 | 384 | |
7102b773 | 385 | if (!active) { |
3bc43840 | 386 | CIFR |= CIFR_RESET_F; |
a5462e5b | 387 | |
5aa2110f GL |
388 | for (i = 0; i < pcdev->channels; i++) { |
389 | DDADR(pcdev->dma_chans[i]) = buf->dmas[i].sg_dma; | |
390 | DCSR(pcdev->dma_chans[i]) = DCSR_RUN; | |
391 | pcdev->sg_tail[i] = buf->dmas[i].sg_cpu + buf->dmas[i].sglen - 1; | |
a5462e5b MR |
392 | } |
393 | ||
3bc43840 GL |
394 | pcdev->active = buf; |
395 | CICR0 |= CICR0_ENB; | |
396 | } else { | |
a5462e5b MR |
397 | struct pxa_cam_dma *buf_dma; |
398 | struct pxa_cam_dma *act_dma; | |
a5462e5b | 399 | int nents; |
a5462e5b | 400 | |
e7c50688 | 401 | for (i = 0; i < pcdev->channels; i++) { |
a5462e5b MR |
402 | buf_dma = &buf->dmas[i]; |
403 | act_dma = &active->dmas[i]; | |
404 | nents = buf_dma->sglen; | |
405 | ||
406 | /* Stop DMA engine */ | |
407 | DCSR(pcdev->dma_chans[i]) = 0; | |
408 | ||
409 | /* Add the descriptors we just initialized to | |
410 | the currently running chain */ | |
5aa2110f GL |
411 | pcdev->sg_tail[i]->ddadr = buf_dma->sg_dma; |
412 | pcdev->sg_tail[i] = buf_dma->sg_cpu + buf_dma->sglen - 1; | |
a5462e5b MR |
413 | |
414 | /* Setup a dummy descriptor with the DMA engines current | |
415 | * state | |
3bc43840 | 416 | */ |
a5462e5b MR |
417 | buf_dma->sg_cpu[nents].dsadr = |
418 | pcdev->res->start + 0x28 + i*8; /* CIBRx */ | |
419 | buf_dma->sg_cpu[nents].dtadr = | |
420 | DTADR(pcdev->dma_chans[i]); | |
421 | buf_dma->sg_cpu[nents].dcmd = | |
422 | DCMD(pcdev->dma_chans[i]); | |
423 | ||
424 | if (DDADR(pcdev->dma_chans[i]) == DDADR_STOP) { | |
425 | /* The DMA engine is on the last | |
426 | descriptor, set the next descriptors | |
427 | address to the descriptors we just | |
428 | initialized */ | |
429 | buf_dma->sg_cpu[nents].ddadr = buf_dma->sg_dma; | |
430 | } else { | |
431 | buf_dma->sg_cpu[nents].ddadr = | |
432 | DDADR(pcdev->dma_chans[i]); | |
433 | } | |
434 | ||
435 | /* The next descriptor is the dummy descriptor */ | |
436 | DDADR(pcdev->dma_chans[i]) = buf_dma->sg_dma + nents * | |
437 | sizeof(struct pxa_dma_desc); | |
438 | ||
439 | DCSR(pcdev->dma_chans[i]) = DCSR_RUN; | |
3bc43840 | 440 | } |
3bc43840 GL |
441 | } |
442 | ||
443 | spin_unlock_irqrestore(&pcdev->lock, flags); | |
3bc43840 GL |
444 | } |
445 | ||
446 | static void pxa_videobuf_release(struct videobuf_queue *vq, | |
447 | struct videobuf_buffer *vb) | |
448 | { | |
449 | struct pxa_buffer *buf = container_of(vb, struct pxa_buffer, vb); | |
450 | #ifdef DEBUG | |
451 | struct soc_camera_device *icd = vq->priv_data; | |
452 | ||
7e28adb2 | 453 | dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__, |
3bc43840 GL |
454 | vb, vb->baddr, vb->bsize); |
455 | ||
456 | switch (vb->state) { | |
457 | case VIDEOBUF_ACTIVE: | |
7e28adb2 | 458 | dev_dbg(&icd->dev, "%s (active)\n", __func__); |
3bc43840 GL |
459 | break; |
460 | case VIDEOBUF_QUEUED: | |
7e28adb2 | 461 | dev_dbg(&icd->dev, "%s (queued)\n", __func__); |
3bc43840 GL |
462 | break; |
463 | case VIDEOBUF_PREPARED: | |
7e28adb2 | 464 | dev_dbg(&icd->dev, "%s (prepared)\n", __func__); |
3bc43840 GL |
465 | break; |
466 | default: | |
7e28adb2 | 467 | dev_dbg(&icd->dev, "%s (unknown)\n", __func__); |
3bc43840 GL |
468 | break; |
469 | } | |
470 | #endif | |
471 | ||
472 | free_buffer(vq, buf); | |
473 | } | |
474 | ||
a5462e5b MR |
475 | static void pxa_camera_wakeup(struct pxa_camera_dev *pcdev, |
476 | struct videobuf_buffer *vb, | |
477 | struct pxa_buffer *buf) | |
478 | { | |
479 | /* _init is used to debug races, see comment in pxa_camera_reqbufs() */ | |
480 | list_del_init(&vb->queue); | |
481 | vb->state = VIDEOBUF_DONE; | |
482 | do_gettimeofday(&vb->ts); | |
483 | vb->field_count++; | |
484 | wake_up(&vb->done); | |
485 | ||
486 | if (list_empty(&pcdev->capture)) { | |
487 | pcdev->active = NULL; | |
488 | DCSR(pcdev->dma_chans[0]) = 0; | |
489 | DCSR(pcdev->dma_chans[1]) = 0; | |
490 | DCSR(pcdev->dma_chans[2]) = 0; | |
491 | CICR0 &= ~CICR0_ENB; | |
492 | return; | |
493 | } | |
494 | ||
495 | pcdev->active = list_entry(pcdev->capture.next, | |
496 | struct pxa_buffer, vb.queue); | |
497 | } | |
498 | ||
499 | static void pxa_camera_dma_irq(int channel, struct pxa_camera_dev *pcdev, | |
500 | enum pxa_camera_active_dma act_dma) | |
3bc43840 | 501 | { |
3bc43840 GL |
502 | struct pxa_buffer *buf; |
503 | unsigned long flags; | |
e7c50688 | 504 | u32 status, camera_status, overrun; |
3bc43840 GL |
505 | struct videobuf_buffer *vb; |
506 | ||
507 | spin_lock_irqsave(&pcdev->lock, flags); | |
508 | ||
a5462e5b MR |
509 | status = DCSR(channel); |
510 | DCSR(channel) = status | DCSR_ENDINTR; | |
7102b773 | 511 | |
3bc43840 | 512 | if (status & DCSR_BUSERR) { |
7102b773 | 513 | dev_err(pcdev->dev, "DMA Bus Error IRQ!\n"); |
3bc43840 GL |
514 | goto out; |
515 | } | |
516 | ||
517 | if (!(status & DCSR_ENDINTR)) { | |
7102b773 GL |
518 | dev_err(pcdev->dev, "Unknown DMA IRQ source, " |
519 | "status: 0x%08x\n", status); | |
3bc43840 GL |
520 | goto out; |
521 | } | |
522 | ||
3bc43840 | 523 | if (!pcdev->active) { |
7102b773 | 524 | dev_err(pcdev->dev, "DMA End IRQ with no active buffer!\n"); |
3bc43840 GL |
525 | goto out; |
526 | } | |
527 | ||
e7c50688 GL |
528 | camera_status = CISR; |
529 | overrun = CISR_IFO_0; | |
530 | if (pcdev->channels == 3) | |
531 | overrun |= CISR_IFO_1 | CISR_IFO_2; | |
532 | if (camera_status & overrun) { | |
533 | dev_dbg(pcdev->dev, "FIFO overrun! CISR: %x\n", camera_status); | |
534 | /* Stop the Capture Interface */ | |
535 | CICR0 &= ~CICR0_ENB; | |
536 | /* Stop DMA */ | |
537 | DCSR(channel) = 0; | |
538 | /* Reset the FIFOs */ | |
539 | CIFR |= CIFR_RESET_F; | |
540 | /* Enable End-Of-Frame Interrupt */ | |
541 | CICR0 &= ~CICR0_EOFM; | |
542 | /* Restart the Capture Interface */ | |
543 | CICR0 |= CICR0_ENB; | |
544 | goto out; | |
545 | } | |
546 | ||
3bc43840 GL |
547 | vb = &pcdev->active->vb; |
548 | buf = container_of(vb, struct pxa_buffer, vb); | |
549 | WARN_ON(buf->inwork || list_empty(&vb->queue)); | |
7e28adb2 | 550 | dev_dbg(pcdev->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__, |
3bc43840 GL |
551 | vb, vb->baddr, vb->bsize); |
552 | ||
a5462e5b MR |
553 | buf->active_dma &= ~act_dma; |
554 | if (!buf->active_dma) | |
555 | pxa_camera_wakeup(pcdev, vb, buf); | |
3bc43840 GL |
556 | |
557 | out: | |
558 | spin_unlock_irqrestore(&pcdev->lock, flags); | |
559 | } | |
560 | ||
a5462e5b MR |
561 | static void pxa_camera_dma_irq_y(int channel, void *data) |
562 | { | |
563 | struct pxa_camera_dev *pcdev = data; | |
564 | pxa_camera_dma_irq(channel, pcdev, DMA_Y); | |
565 | } | |
566 | ||
567 | static void pxa_camera_dma_irq_u(int channel, void *data) | |
568 | { | |
569 | struct pxa_camera_dev *pcdev = data; | |
570 | pxa_camera_dma_irq(channel, pcdev, DMA_U); | |
571 | } | |
572 | ||
573 | static void pxa_camera_dma_irq_v(int channel, void *data) | |
574 | { | |
575 | struct pxa_camera_dev *pcdev = data; | |
576 | pxa_camera_dma_irq(channel, pcdev, DMA_V); | |
577 | } | |
578 | ||
7102b773 | 579 | static struct videobuf_queue_ops pxa_videobuf_ops = { |
3bc43840 GL |
580 | .buf_setup = pxa_videobuf_setup, |
581 | .buf_prepare = pxa_videobuf_prepare, | |
582 | .buf_queue = pxa_videobuf_queue, | |
583 | .buf_release = pxa_videobuf_release, | |
584 | }; | |
585 | ||
a034d1b7 | 586 | static void pxa_camera_init_videobuf(struct videobuf_queue *q, |
092d3921 PZ |
587 | struct soc_camera_device *icd) |
588 | { | |
a034d1b7 MD |
589 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
590 | struct pxa_camera_dev *pcdev = ici->priv; | |
591 | ||
092d3921 PZ |
592 | /* We must pass NULL as dev pointer, then all pci_* dma operations |
593 | * transform to normal dma_* ones. */ | |
a034d1b7 | 594 | videobuf_queue_sg_init(q, &pxa_videobuf_ops, NULL, &pcdev->lock, |
092d3921 PZ |
595 | V4L2_BUF_TYPE_VIDEO_CAPTURE, V4L2_FIELD_NONE, |
596 | sizeof(struct pxa_buffer), icd); | |
597 | } | |
598 | ||
3bc43840 GL |
599 | static int mclk_get_divisor(struct pxa_camera_dev *pcdev) |
600 | { | |
601 | unsigned int mclk_10khz = pcdev->platform_mclk_10khz; | |
602 | unsigned long div; | |
603 | unsigned long lcdclk; | |
604 | ||
605 | lcdclk = clk_get_rate(pcdev->clk) / 10000; | |
606 | ||
607 | /* We verify platform_mclk_10khz != 0, so if anyone breaks it, here | |
608 | * they get a nice Oops */ | |
609 | div = (lcdclk + 2 * mclk_10khz - 1) / (2 * mclk_10khz) - 1; | |
610 | ||
611 | dev_dbg(pcdev->dev, "LCD clock %lukHz, target freq %dkHz, " | |
612 | "divisor %lu\n", lcdclk * 10, mclk_10khz * 10, div); | |
613 | ||
614 | return div; | |
615 | } | |
616 | ||
7102b773 | 617 | static void pxa_camera_activate(struct pxa_camera_dev *pcdev) |
3bc43840 GL |
618 | { |
619 | struct pxacamera_platform_data *pdata = pcdev->pdata; | |
620 | u32 cicr4 = 0; | |
621 | ||
622 | dev_dbg(pcdev->dev, "Registered platform device at %p data %p\n", | |
623 | pcdev, pdata); | |
624 | ||
625 | if (pdata && pdata->init) { | |
7e28adb2 | 626 | dev_dbg(pcdev->dev, "%s: Init gpios\n", __func__); |
3bc43840 GL |
627 | pdata->init(pcdev->dev); |
628 | } | |
629 | ||
630 | if (pdata && pdata->power) { | |
7e28adb2 | 631 | dev_dbg(pcdev->dev, "%s: Power on camera\n", __func__); |
3bc43840 GL |
632 | pdata->power(pcdev->dev, 1); |
633 | } | |
634 | ||
635 | if (pdata && pdata->reset) { | |
636 | dev_dbg(pcdev->dev, "%s: Releasing camera reset\n", | |
7e28adb2 | 637 | __func__); |
3bc43840 GL |
638 | pdata->reset(pcdev->dev, 1); |
639 | } | |
640 | ||
641 | CICR0 = 0x3FF; /* disable all interrupts */ | |
642 | ||
643 | if (pcdev->platform_flags & PXA_CAMERA_PCLK_EN) | |
644 | cicr4 |= CICR4_PCLK_EN; | |
645 | if (pcdev->platform_flags & PXA_CAMERA_MCLK_EN) | |
646 | cicr4 |= CICR4_MCLK_EN; | |
647 | if (pcdev->platform_flags & PXA_CAMERA_PCP) | |
648 | cicr4 |= CICR4_PCP; | |
649 | if (pcdev->platform_flags & PXA_CAMERA_HSP) | |
650 | cicr4 |= CICR4_HSP; | |
651 | if (pcdev->platform_flags & PXA_CAMERA_VSP) | |
652 | cicr4 |= CICR4_VSP; | |
653 | ||
654 | CICR4 = mclk_get_divisor(pcdev) | cicr4; | |
655 | ||
656 | clk_enable(pcdev->clk); | |
657 | } | |
658 | ||
7102b773 | 659 | static void pxa_camera_deactivate(struct pxa_camera_dev *pcdev) |
3bc43840 GL |
660 | { |
661 | struct pxacamera_platform_data *board = pcdev->pdata; | |
662 | ||
663 | clk_disable(pcdev->clk); | |
664 | ||
665 | if (board && board->reset) { | |
666 | dev_dbg(pcdev->dev, "%s: Asserting camera reset\n", | |
7e28adb2 | 667 | __func__); |
3bc43840 GL |
668 | board->reset(pcdev->dev, 0); |
669 | } | |
670 | ||
671 | if (board && board->power) { | |
7e28adb2 | 672 | dev_dbg(pcdev->dev, "%s: Power off camera\n", __func__); |
3bc43840 GL |
673 | board->power(pcdev->dev, 0); |
674 | } | |
675 | } | |
676 | ||
677 | static irqreturn_t pxa_camera_irq(int irq, void *data) | |
678 | { | |
679 | struct pxa_camera_dev *pcdev = data; | |
680 | unsigned int status = CISR; | |
681 | ||
682 | dev_dbg(pcdev->dev, "Camera interrupt status 0x%x\n", status); | |
683 | ||
e7c50688 GL |
684 | if (!status) |
685 | return IRQ_NONE; | |
686 | ||
3bc43840 | 687 | CISR = status; |
e7c50688 GL |
688 | |
689 | if (status & CISR_EOF) { | |
690 | int i; | |
691 | for (i = 0; i < pcdev->channels; i++) { | |
692 | DDADR(pcdev->dma_chans[i]) = | |
693 | pcdev->active->dmas[i].sg_dma; | |
694 | DCSR(pcdev->dma_chans[i]) = DCSR_RUN; | |
695 | } | |
696 | CICR0 |= CICR0_EOFM; | |
697 | } | |
698 | ||
3bc43840 GL |
699 | return IRQ_HANDLED; |
700 | } | |
701 | ||
702 | /* The following two functions absolutely depend on the fact, that | |
703 | * there can be only one camera on PXA quick capture interface */ | |
7102b773 | 704 | static int pxa_camera_add_device(struct soc_camera_device *icd) |
3bc43840 GL |
705 | { |
706 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
707 | struct pxa_camera_dev *pcdev = ici->priv; | |
708 | int ret; | |
709 | ||
710 | mutex_lock(&camera_lock); | |
711 | ||
712 | if (pcdev->icd) { | |
713 | ret = -EBUSY; | |
714 | goto ebusy; | |
715 | } | |
716 | ||
717 | dev_info(&icd->dev, "PXA Camera driver attached to camera %d\n", | |
718 | icd->devnum); | |
719 | ||
7102b773 | 720 | pxa_camera_activate(pcdev); |
3bc43840 GL |
721 | ret = icd->ops->init(icd); |
722 | ||
723 | if (!ret) | |
724 | pcdev->icd = icd; | |
725 | ||
726 | ebusy: | |
727 | mutex_unlock(&camera_lock); | |
728 | ||
729 | return ret; | |
730 | } | |
731 | ||
7102b773 | 732 | static void pxa_camera_remove_device(struct soc_camera_device *icd) |
3bc43840 GL |
733 | { |
734 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
735 | struct pxa_camera_dev *pcdev = ici->priv; | |
736 | ||
737 | BUG_ON(icd != pcdev->icd); | |
738 | ||
739 | dev_info(&icd->dev, "PXA Camera driver detached from camera %d\n", | |
740 | icd->devnum); | |
741 | ||
742 | /* disable capture, disable interrupts */ | |
743 | CICR0 = 0x3ff; | |
a5462e5b | 744 | |
3bc43840 | 745 | /* Stop DMA engine */ |
a5462e5b MR |
746 | DCSR(pcdev->dma_chans[0]) = 0; |
747 | DCSR(pcdev->dma_chans[1]) = 0; | |
748 | DCSR(pcdev->dma_chans[2]) = 0; | |
3bc43840 GL |
749 | |
750 | icd->ops->release(icd); | |
751 | ||
7102b773 | 752 | pxa_camera_deactivate(pcdev); |
3bc43840 GL |
753 | |
754 | pcdev->icd = NULL; | |
755 | } | |
756 | ||
ad5f2e85 GL |
757 | static int test_platform_param(struct pxa_camera_dev *pcdev, |
758 | unsigned char buswidth, unsigned long *flags) | |
3bc43840 | 759 | { |
ad5f2e85 GL |
760 | /* |
761 | * Platform specified synchronization and pixel clock polarities are | |
762 | * only a recommendation and are only used during probing. The PXA270 | |
763 | * quick capture interface supports both. | |
764 | */ | |
765 | *flags = (pcdev->platform_flags & PXA_CAMERA_MASTER ? | |
766 | SOCAM_MASTER : SOCAM_SLAVE) | | |
767 | SOCAM_HSYNC_ACTIVE_HIGH | | |
768 | SOCAM_HSYNC_ACTIVE_LOW | | |
769 | SOCAM_VSYNC_ACTIVE_HIGH | | |
770 | SOCAM_VSYNC_ACTIVE_LOW | | |
771 | SOCAM_PCLK_SAMPLE_RISING | | |
772 | SOCAM_PCLK_SAMPLE_FALLING; | |
3bc43840 GL |
773 | |
774 | /* If requested data width is supported by the platform, use it */ | |
ad5f2e85 | 775 | switch (buswidth) { |
3bc43840 | 776 | case 10: |
ad5f2e85 GL |
777 | if (!(pcdev->platform_flags & PXA_CAMERA_DATAWIDTH_10)) |
778 | return -EINVAL; | |
779 | *flags |= SOCAM_DATAWIDTH_10; | |
3bc43840 GL |
780 | break; |
781 | case 9: | |
ad5f2e85 GL |
782 | if (!(pcdev->platform_flags & PXA_CAMERA_DATAWIDTH_9)) |
783 | return -EINVAL; | |
784 | *flags |= SOCAM_DATAWIDTH_9; | |
3bc43840 GL |
785 | break; |
786 | case 8: | |
ad5f2e85 GL |
787 | if (!(pcdev->platform_flags & PXA_CAMERA_DATAWIDTH_8)) |
788 | return -EINVAL; | |
789 | *flags |= SOCAM_DATAWIDTH_8; | |
3bc43840 | 790 | } |
ad5f2e85 GL |
791 | |
792 | return 0; | |
793 | } | |
794 | ||
795 | static int pxa_camera_set_bus_param(struct soc_camera_device *icd, __u32 pixfmt) | |
796 | { | |
797 | struct soc_camera_host *ici = | |
798 | to_soc_camera_host(icd->dev.parent); | |
799 | struct pxa_camera_dev *pcdev = ici->priv; | |
800 | unsigned long dw, bpp, bus_flags, camera_flags, common_flags; | |
a5462e5b | 801 | u32 cicr0, cicr1, cicr4 = 0; |
ad5f2e85 GL |
802 | int ret = test_platform_param(pcdev, icd->buswidth, &bus_flags); |
803 | ||
804 | if (ret < 0) | |
805 | return ret; | |
806 | ||
807 | camera_flags = icd->ops->query_bus_param(icd); | |
808 | ||
809 | common_flags = soc_camera_bus_param_compatible(camera_flags, bus_flags); | |
810 | if (!common_flags) | |
3bc43840 GL |
811 | return -EINVAL; |
812 | ||
e7c50688 GL |
813 | pcdev->channels = 1; |
814 | ||
ad5f2e85 GL |
815 | /* Make choises, based on platform preferences */ |
816 | if ((common_flags & SOCAM_HSYNC_ACTIVE_HIGH) && | |
817 | (common_flags & SOCAM_HSYNC_ACTIVE_LOW)) { | |
818 | if (pcdev->platform_flags & PXA_CAMERA_HSP) | |
819 | common_flags &= ~SOCAM_HSYNC_ACTIVE_HIGH; | |
820 | else | |
821 | common_flags &= ~SOCAM_HSYNC_ACTIVE_LOW; | |
822 | } | |
823 | ||
824 | if ((common_flags & SOCAM_VSYNC_ACTIVE_HIGH) && | |
825 | (common_flags & SOCAM_VSYNC_ACTIVE_LOW)) { | |
826 | if (pcdev->platform_flags & PXA_CAMERA_VSP) | |
827 | common_flags &= ~SOCAM_VSYNC_ACTIVE_HIGH; | |
828 | else | |
829 | common_flags &= ~SOCAM_VSYNC_ACTIVE_LOW; | |
830 | } | |
831 | ||
832 | if ((common_flags & SOCAM_PCLK_SAMPLE_RISING) && | |
833 | (common_flags & SOCAM_PCLK_SAMPLE_FALLING)) { | |
834 | if (pcdev->platform_flags & PXA_CAMERA_PCP) | |
835 | common_flags &= ~SOCAM_PCLK_SAMPLE_RISING; | |
836 | else | |
837 | common_flags &= ~SOCAM_PCLK_SAMPLE_FALLING; | |
838 | } | |
839 | ||
840 | ret = icd->ops->set_bus_param(icd, common_flags); | |
3bc43840 GL |
841 | if (ret < 0) |
842 | return ret; | |
843 | ||
844 | /* Datawidth is now guaranteed to be equal to one of the three values. | |
845 | * We fix bit-per-pixel equal to data-width... */ | |
ad5f2e85 GL |
846 | switch (common_flags & SOCAM_DATAWIDTH_MASK) { |
847 | case SOCAM_DATAWIDTH_10: | |
848 | icd->buswidth = 10; | |
3bc43840 GL |
849 | dw = 4; |
850 | bpp = 0x40; | |
851 | break; | |
ad5f2e85 GL |
852 | case SOCAM_DATAWIDTH_9: |
853 | icd->buswidth = 9; | |
3bc43840 GL |
854 | dw = 3; |
855 | bpp = 0x20; | |
856 | break; | |
857 | default: | |
858 | /* Actually it can only be 8 now, | |
859 | * default is just to silence compiler warnings */ | |
ad5f2e85 GL |
860 | case SOCAM_DATAWIDTH_8: |
861 | icd->buswidth = 8; | |
3bc43840 GL |
862 | dw = 2; |
863 | bpp = 0; | |
864 | } | |
865 | ||
866 | if (pcdev->platform_flags & PXA_CAMERA_PCLK_EN) | |
867 | cicr4 |= CICR4_PCLK_EN; | |
868 | if (pcdev->platform_flags & PXA_CAMERA_MCLK_EN) | |
869 | cicr4 |= CICR4_MCLK_EN; | |
ad5f2e85 | 870 | if (common_flags & SOCAM_PCLK_SAMPLE_FALLING) |
3bc43840 | 871 | cicr4 |= CICR4_PCP; |
ad5f2e85 | 872 | if (common_flags & SOCAM_HSYNC_ACTIVE_LOW) |
3bc43840 | 873 | cicr4 |= CICR4_HSP; |
ad5f2e85 | 874 | if (common_flags & SOCAM_VSYNC_ACTIVE_LOW) |
3bc43840 GL |
875 | cicr4 |= CICR4_VSP; |
876 | ||
877 | cicr0 = CICR0; | |
878 | if (cicr0 & CICR0_ENB) | |
879 | CICR0 = cicr0 & ~CICR0_ENB; | |
a5462e5b MR |
880 | |
881 | cicr1 = CICR1_PPL_VAL(icd->width - 1) | bpp | dw; | |
882 | ||
883 | switch (pixfmt) { | |
884 | case V4L2_PIX_FMT_YUV422P: | |
e7c50688 | 885 | pcdev->channels = 3; |
a5462e5b MR |
886 | cicr1 |= CICR1_YCBCR_F; |
887 | case V4L2_PIX_FMT_YUYV: | |
888 | cicr1 |= CICR1_COLOR_SP_VAL(2); | |
889 | break; | |
890 | case V4L2_PIX_FMT_RGB555: | |
891 | cicr1 |= CICR1_RGB_BPP_VAL(1) | CICR1_RGBT_CONV_VAL(2) | | |
892 | CICR1_TBIT | CICR1_COLOR_SP_VAL(1); | |
893 | break; | |
894 | case V4L2_PIX_FMT_RGB565: | |
895 | cicr1 |= CICR1_COLOR_SP_VAL(1) | CICR1_RGB_BPP_VAL(2); | |
896 | break; | |
897 | } | |
898 | ||
899 | CICR1 = cicr1; | |
3bc43840 | 900 | CICR2 = 0; |
ad5f2e85 | 901 | CICR3 = CICR3_LPF_VAL(icd->height - 1) | |
3bc43840 GL |
902 | CICR3_BFW_VAL(min((unsigned short)255, icd->y_skip_top)); |
903 | CICR4 = mclk_get_divisor(pcdev) | cicr4; | |
904 | ||
905 | /* CIF interrupts are not used, only DMA */ | |
906 | CICR0 = (pcdev->platform_flags & PXA_CAMERA_MASTER ? | |
7102b773 | 907 | CICR0_SIM_MP : (CICR0_SL_CAP_EN | CICR0_SIM_SP)) | |
3bc43840 GL |
908 | CICR0_DMAEN | CICR0_IRQ_MASK | (cicr0 & CICR0_ENB); |
909 | ||
910 | return 0; | |
911 | } | |
912 | ||
ad5f2e85 GL |
913 | static int pxa_camera_try_bus_param(struct soc_camera_device *icd, __u32 pixfmt) |
914 | { | |
915 | struct soc_camera_host *ici = | |
916 | to_soc_camera_host(icd->dev.parent); | |
917 | struct pxa_camera_dev *pcdev = ici->priv; | |
918 | unsigned long bus_flags, camera_flags; | |
919 | int ret = test_platform_param(pcdev, icd->buswidth, &bus_flags); | |
920 | ||
921 | if (ret < 0) | |
922 | return ret; | |
923 | ||
924 | camera_flags = icd->ops->query_bus_param(icd); | |
925 | ||
926 | return soc_camera_bus_param_compatible(camera_flags, bus_flags) ? 0 : -EINVAL; | |
927 | } | |
928 | ||
929 | static int pxa_camera_set_fmt_cap(struct soc_camera_device *icd, | |
930 | __u32 pixfmt, struct v4l2_rect *rect) | |
931 | { | |
932 | return icd->ops->set_fmt_cap(icd, pixfmt, rect); | |
933 | } | |
934 | ||
935 | static int pxa_camera_try_fmt_cap(struct soc_camera_device *icd, | |
7102b773 | 936 | struct v4l2_format *f) |
3bc43840 GL |
937 | { |
938 | /* limit to pxa hardware capabilities */ | |
939 | if (f->fmt.pix.height < 32) | |
940 | f->fmt.pix.height = 32; | |
941 | if (f->fmt.pix.height > 2048) | |
942 | f->fmt.pix.height = 2048; | |
943 | if (f->fmt.pix.width < 48) | |
944 | f->fmt.pix.width = 48; | |
945 | if (f->fmt.pix.width > 2048) | |
946 | f->fmt.pix.width = 2048; | |
947 | f->fmt.pix.width &= ~0x01; | |
948 | ||
ad5f2e85 GL |
949 | /* limit to sensor capabilities */ |
950 | return icd->ops->try_fmt_cap(icd, f); | |
3bc43840 GL |
951 | } |
952 | ||
7102b773 GL |
953 | static int pxa_camera_reqbufs(struct soc_camera_file *icf, |
954 | struct v4l2_requestbuffers *p) | |
3bc43840 GL |
955 | { |
956 | int i; | |
957 | ||
958 | /* This is for locking debugging only. I removed spinlocks and now I | |
959 | * check whether .prepare is ever called on a linked buffer, or whether | |
960 | * a dma IRQ can occur for an in-work or unlinked buffer. Until now | |
961 | * it hadn't triggered */ | |
962 | for (i = 0; i < p->count; i++) { | |
963 | struct pxa_buffer *buf = container_of(icf->vb_vidq.bufs[i], | |
964 | struct pxa_buffer, vb); | |
965 | buf->inwork = 0; | |
966 | INIT_LIST_HEAD(&buf->vb.queue); | |
967 | } | |
968 | ||
969 | return 0; | |
970 | } | |
971 | ||
7102b773 | 972 | static unsigned int pxa_camera_poll(struct file *file, poll_table *pt) |
3bc43840 GL |
973 | { |
974 | struct soc_camera_file *icf = file->private_data; | |
975 | struct pxa_buffer *buf; | |
976 | ||
977 | buf = list_entry(icf->vb_vidq.stream.next, struct pxa_buffer, | |
978 | vb.stream); | |
979 | ||
980 | poll_wait(file, &buf->vb.done, pt); | |
981 | ||
982 | if (buf->vb.state == VIDEOBUF_DONE || | |
983 | buf->vb.state == VIDEOBUF_ERROR) | |
984 | return POLLIN|POLLRDNORM; | |
985 | ||
986 | return 0; | |
987 | } | |
988 | ||
7102b773 GL |
989 | static int pxa_camera_querycap(struct soc_camera_host *ici, |
990 | struct v4l2_capability *cap) | |
3bc43840 GL |
991 | { |
992 | /* cap->name is set by the firendly caller:-> */ | |
993 | strlcpy(cap->card, pxa_cam_driver_description, sizeof(cap->card)); | |
994 | cap->version = PXA_CAM_VERSION_CODE; | |
995 | cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; | |
996 | ||
997 | return 0; | |
998 | } | |
999 | ||
b8d9904c GL |
1000 | static struct soc_camera_host_ops pxa_soc_camera_host_ops = { |
1001 | .owner = THIS_MODULE, | |
1002 | .add = pxa_camera_add_device, | |
1003 | .remove = pxa_camera_remove_device, | |
1004 | .set_fmt_cap = pxa_camera_set_fmt_cap, | |
1005 | .try_fmt_cap = pxa_camera_try_fmt_cap, | |
092d3921 | 1006 | .init_videobuf = pxa_camera_init_videobuf, |
b8d9904c GL |
1007 | .reqbufs = pxa_camera_reqbufs, |
1008 | .poll = pxa_camera_poll, | |
1009 | .querycap = pxa_camera_querycap, | |
1010 | .try_bus_param = pxa_camera_try_bus_param, | |
1011 | .set_bus_param = pxa_camera_set_bus_param, | |
1012 | }; | |
1013 | ||
1014 | /* Should be allocated dynamically too, but we have only one. */ | |
3bc43840 GL |
1015 | static struct soc_camera_host pxa_soc_camera_host = { |
1016 | .drv_name = PXA_CAM_DRV_NAME, | |
b8d9904c | 1017 | .ops = &pxa_soc_camera_host_ops, |
3bc43840 GL |
1018 | }; |
1019 | ||
1020 | static int pxa_camera_probe(struct platform_device *pdev) | |
1021 | { | |
1022 | struct pxa_camera_dev *pcdev; | |
1023 | struct resource *res; | |
1024 | void __iomem *base; | |
02da4659 | 1025 | int irq; |
3bc43840 GL |
1026 | int err = 0; |
1027 | ||
1028 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1029 | irq = platform_get_irq(pdev, 0); | |
02da4659 | 1030 | if (!res || irq < 0) { |
3bc43840 GL |
1031 | err = -ENODEV; |
1032 | goto exit; | |
1033 | } | |
1034 | ||
1035 | pcdev = kzalloc(sizeof(*pcdev), GFP_KERNEL); | |
1036 | if (!pcdev) { | |
7102b773 | 1037 | dev_err(&pdev->dev, "Could not allocate pcdev\n"); |
3bc43840 GL |
1038 | err = -ENOMEM; |
1039 | goto exit; | |
1040 | } | |
1041 | ||
1042 | pcdev->clk = clk_get(&pdev->dev, "CAMCLK"); | |
1043 | if (IS_ERR(pcdev->clk)) { | |
1044 | err = PTR_ERR(pcdev->clk); | |
1045 | goto exit_kfree; | |
1046 | } | |
1047 | ||
1048 | dev_set_drvdata(&pdev->dev, pcdev); | |
1049 | pcdev->res = res; | |
1050 | ||
1051 | pcdev->pdata = pdev->dev.platform_data; | |
1052 | pcdev->platform_flags = pcdev->pdata->flags; | |
ad5f2e85 GL |
1053 | if (!(pcdev->platform_flags & (PXA_CAMERA_DATAWIDTH_8 | |
1054 | PXA_CAMERA_DATAWIDTH_9 | PXA_CAMERA_DATAWIDTH_10))) { | |
3bc43840 GL |
1055 | /* Platform hasn't set available data widths. This is bad. |
1056 | * Warn and use a default. */ | |
1057 | dev_warn(&pdev->dev, "WARNING! Platform hasn't set available " | |
1058 | "data widths, using default 10 bit\n"); | |
1059 | pcdev->platform_flags |= PXA_CAMERA_DATAWIDTH_10; | |
1060 | } | |
1061 | pcdev->platform_mclk_10khz = pcdev->pdata->mclk_10khz; | |
1062 | if (!pcdev->platform_mclk_10khz) { | |
1063 | dev_warn(&pdev->dev, | |
1064 | "mclk_10khz == 0! Please, fix your platform data. " | |
1065 | "Using default 20MHz\n"); | |
1066 | pcdev->platform_mclk_10khz = 2000; | |
1067 | } | |
1068 | ||
1069 | INIT_LIST_HEAD(&pcdev->capture); | |
1070 | spin_lock_init(&pcdev->lock); | |
1071 | ||
1072 | /* | |
1073 | * Request the regions. | |
1074 | */ | |
1075 | if (!request_mem_region(res->start, res->end - res->start + 1, | |
1076 | PXA_CAM_DRV_NAME)) { | |
1077 | err = -EBUSY; | |
1078 | goto exit_clk; | |
1079 | } | |
1080 | ||
1081 | base = ioremap(res->start, res->end - res->start + 1); | |
1082 | if (!base) { | |
1083 | err = -ENOMEM; | |
1084 | goto exit_release; | |
1085 | } | |
1086 | pcdev->irq = irq; | |
1087 | pcdev->base = base; | |
1088 | pcdev->dev = &pdev->dev; | |
1089 | ||
1090 | /* request dma */ | |
a5462e5b MR |
1091 | pcdev->dma_chans[0] = pxa_request_dma("CI_Y", DMA_PRIO_HIGH, |
1092 | pxa_camera_dma_irq_y, pcdev); | |
1093 | if (pcdev->dma_chans[0] < 0) { | |
3bc43840 GL |
1094 | dev_err(pcdev->dev, "Can't request DMA for Y\n"); |
1095 | err = -ENOMEM; | |
1096 | goto exit_iounmap; | |
1097 | } | |
a5462e5b MR |
1098 | dev_dbg(pcdev->dev, "got DMA channel %d\n", pcdev->dma_chans[0]); |
1099 | ||
1100 | pcdev->dma_chans[1] = pxa_request_dma("CI_U", DMA_PRIO_HIGH, | |
1101 | pxa_camera_dma_irq_u, pcdev); | |
1102 | if (pcdev->dma_chans[1] < 0) { | |
1103 | dev_err(pcdev->dev, "Can't request DMA for U\n"); | |
1104 | err = -ENOMEM; | |
1105 | goto exit_free_dma_y; | |
1106 | } | |
1107 | dev_dbg(pcdev->dev, "got DMA channel (U) %d\n", pcdev->dma_chans[1]); | |
1108 | ||
1109 | pcdev->dma_chans[2] = pxa_request_dma("CI_V", DMA_PRIO_HIGH, | |
1110 | pxa_camera_dma_irq_v, pcdev); | |
1111 | if (pcdev->dma_chans[0] < 0) { | |
1112 | dev_err(pcdev->dev, "Can't request DMA for V\n"); | |
1113 | err = -ENOMEM; | |
1114 | goto exit_free_dma_u; | |
1115 | } | |
1116 | dev_dbg(pcdev->dev, "got DMA channel (V) %d\n", pcdev->dma_chans[2]); | |
3bc43840 | 1117 | |
a5462e5b MR |
1118 | DRCMR68 = pcdev->dma_chans[0] | DRCMR_MAPVLD; |
1119 | DRCMR69 = pcdev->dma_chans[1] | DRCMR_MAPVLD; | |
1120 | DRCMR70 = pcdev->dma_chans[2] | DRCMR_MAPVLD; | |
3bc43840 GL |
1121 | |
1122 | /* request irq */ | |
1123 | err = request_irq(pcdev->irq, pxa_camera_irq, 0, PXA_CAM_DRV_NAME, | |
1124 | pcdev); | |
1125 | if (err) { | |
1126 | dev_err(pcdev->dev, "Camera interrupt register failed \n"); | |
1127 | goto exit_free_dma; | |
1128 | } | |
1129 | ||
1130 | pxa_soc_camera_host.priv = pcdev; | |
1131 | pxa_soc_camera_host.dev.parent = &pdev->dev; | |
1132 | pxa_soc_camera_host.nr = pdev->id; | |
b8d9904c | 1133 | err = soc_camera_host_register(&pxa_soc_camera_host); |
3bc43840 GL |
1134 | if (err) |
1135 | goto exit_free_irq; | |
1136 | ||
1137 | return 0; | |
1138 | ||
1139 | exit_free_irq: | |
1140 | free_irq(pcdev->irq, pcdev); | |
1141 | exit_free_dma: | |
a5462e5b MR |
1142 | pxa_free_dma(pcdev->dma_chans[2]); |
1143 | exit_free_dma_u: | |
1144 | pxa_free_dma(pcdev->dma_chans[1]); | |
1145 | exit_free_dma_y: | |
1146 | pxa_free_dma(pcdev->dma_chans[0]); | |
3bc43840 GL |
1147 | exit_iounmap: |
1148 | iounmap(base); | |
1149 | exit_release: | |
1150 | release_mem_region(res->start, res->end - res->start + 1); | |
1151 | exit_clk: | |
1152 | clk_put(pcdev->clk); | |
1153 | exit_kfree: | |
1154 | kfree(pcdev); | |
1155 | exit: | |
1156 | return err; | |
1157 | } | |
1158 | ||
1159 | static int __devexit pxa_camera_remove(struct platform_device *pdev) | |
1160 | { | |
1161 | struct pxa_camera_dev *pcdev = platform_get_drvdata(pdev); | |
1162 | struct resource *res; | |
1163 | ||
1164 | clk_put(pcdev->clk); | |
1165 | ||
a5462e5b MR |
1166 | pxa_free_dma(pcdev->dma_chans[0]); |
1167 | pxa_free_dma(pcdev->dma_chans[1]); | |
1168 | pxa_free_dma(pcdev->dma_chans[2]); | |
3bc43840 GL |
1169 | free_irq(pcdev->irq, pcdev); |
1170 | ||
1171 | soc_camera_host_unregister(&pxa_soc_camera_host); | |
1172 | ||
1173 | iounmap(pcdev->base); | |
1174 | ||
1175 | res = pcdev->res; | |
1176 | release_mem_region(res->start, res->end - res->start + 1); | |
1177 | ||
1178 | kfree(pcdev); | |
1179 | ||
7102b773 | 1180 | dev_info(&pdev->dev, "PXA Camera driver unloaded\n"); |
3bc43840 | 1181 | |
3bc43840 GL |
1182 | return 0; |
1183 | } | |
1184 | ||
3bc43840 GL |
1185 | static struct platform_driver pxa_camera_driver = { |
1186 | .driver = { | |
1187 | .name = PXA_CAM_DRV_NAME, | |
1188 | }, | |
1189 | .probe = pxa_camera_probe, | |
1190 | .remove = __exit_p(pxa_camera_remove), | |
3bc43840 GL |
1191 | }; |
1192 | ||
1193 | ||
1194 | static int __devinit pxa_camera_init(void) | |
1195 | { | |
1196 | return platform_driver_register(&pxa_camera_driver); | |
1197 | } | |
1198 | ||
1199 | static void __exit pxa_camera_exit(void) | |
1200 | { | |
01c1e4ca | 1201 | platform_driver_unregister(&pxa_camera_driver); |
3bc43840 GL |
1202 | } |
1203 | ||
1204 | module_init(pxa_camera_init); | |
1205 | module_exit(pxa_camera_exit); | |
1206 | ||
1207 | MODULE_DESCRIPTION("PXA27x SoC Camera Host driver"); | |
1208 | MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>"); | |
1209 | MODULE_LICENSE("GPL"); |