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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> | |
33 | #include <media/soc_camera.h> | |
34 | ||
35 | #include <linux/videodev2.h> | |
36 | ||
37 | #include <asm/dma.h> | |
38 | #include <asm/arch/pxa-regs.h> | |
39 | #include <asm/arch/camera.h> | |
40 | ||
41 | #define PXA_CAM_VERSION_CODE KERNEL_VERSION(0, 0, 5) | |
42 | #define PXA_CAM_DRV_NAME "pxa27x-camera" | |
43 | ||
7102b773 GL |
44 | #define CICR0_SIM_MP (0 << 24) |
45 | #define CICR0_SIM_SP (1 << 24) | |
46 | #define CICR0_SIM_MS (2 << 24) | |
47 | #define CICR0_SIM_EP (3 << 24) | |
48 | #define CICR0_SIM_ES (4 << 24) | |
49 | ||
50 | #define CICR1_DW_VAL(x) ((x) & CICR1_DW) /* Data bus width */ | |
51 | #define CICR1_PPL_VAL(x) (((x) << 15) & CICR1_PPL) /* Pixels per line */ | |
a5462e5b MR |
52 | #define CICR1_COLOR_SP_VAL(x) (((x) << 3) & CICR1_COLOR_SP) /* color space */ |
53 | #define CICR1_RGB_BPP_VAL(x) (((x) << 7) & CICR1_RGB_BPP) /* bpp for rgb */ | |
54 | #define CICR1_RGBT_CONV_VAL(x) (((x) << 29) & CICR1_RGBT_CONV) /* rgbt conv */ | |
7102b773 GL |
55 | |
56 | #define CICR2_BLW_VAL(x) (((x) << 24) & CICR2_BLW) /* Beginning-of-line pixel clock wait count */ | |
57 | #define CICR2_ELW_VAL(x) (((x) << 16) & CICR2_ELW) /* End-of-line pixel clock wait count */ | |
58 | #define CICR2_HSW_VAL(x) (((x) << 10) & CICR2_HSW) /* Horizontal sync pulse width */ | |
59 | #define CICR2_BFPW_VAL(x) (((x) << 3) & CICR2_BFPW) /* Beginning-of-frame pixel clock wait count */ | |
60 | #define CICR2_FSW_VAL(x) (((x) << 0) & CICR2_FSW) /* Frame stabilization wait count */ | |
61 | ||
62 | #define CICR3_BFW_VAL(x) (((x) << 24) & CICR3_BFW) /* Beginning-of-frame line clock wait count */ | |
63 | #define CICR3_EFW_VAL(x) (((x) << 16) & CICR3_EFW) /* End-of-frame line clock wait count */ | |
64 | #define CICR3_VSW_VAL(x) (((x) << 11) & CICR3_VSW) /* Vertical sync pulse width */ | |
65 | #define CICR3_LPF_VAL(x) (((x) << 0) & CICR3_LPF) /* Lines per frame */ | |
66 | ||
3bc43840 GL |
67 | #define CICR0_IRQ_MASK (CICR0_TOM | CICR0_RDAVM | CICR0_FEM | CICR0_EOLM | \ |
68 | CICR0_PERRM | CICR0_QDM | CICR0_CDM | CICR0_SOFM | \ | |
69 | CICR0_EOFM | CICR0_FOM) | |
70 | ||
71 | static DEFINE_MUTEX(camera_lock); | |
72 | ||
73 | /* | |
74 | * Structures | |
75 | */ | |
a5462e5b MR |
76 | enum pxa_camera_active_dma { |
77 | DMA_Y = 0x1, | |
78 | DMA_U = 0x2, | |
79 | DMA_V = 0x4, | |
80 | }; | |
81 | ||
82 | /* descriptor needed for the PXA DMA engine */ | |
83 | struct pxa_cam_dma { | |
84 | dma_addr_t sg_dma; | |
85 | struct pxa_dma_desc *sg_cpu; | |
86 | size_t sg_size; | |
87 | int sglen; | |
88 | }; | |
3bc43840 GL |
89 | |
90 | /* buffer for one video frame */ | |
91 | struct pxa_buffer { | |
92 | /* common v4l buffer stuff -- must be first */ | |
93 | struct videobuf_buffer vb; | |
94 | ||
95 | const struct soc_camera_data_format *fmt; | |
96 | ||
a5462e5b MR |
97 | /* our descriptor lists for Y, U and V channels */ |
98 | struct pxa_cam_dma dmas[3]; | |
99 | ||
3bc43840 | 100 | int inwork; |
a5462e5b MR |
101 | |
102 | enum pxa_camera_active_dma active_dma; | |
3bc43840 GL |
103 | }; |
104 | ||
105 | struct pxa_framebuffer_queue { | |
106 | dma_addr_t sg_last_dma; | |
107 | struct pxa_dma_desc *sg_last_cpu; | |
108 | }; | |
109 | ||
110 | struct pxa_camera_dev { | |
111 | struct device *dev; | |
112 | /* PXA27x is only supposed to handle one camera on its Quick Capture | |
113 | * interface. If anyone ever builds hardware to enable more than | |
114 | * one camera, they will have to modify this driver too */ | |
115 | struct soc_camera_device *icd; | |
116 | struct clk *clk; | |
117 | ||
118 | unsigned int irq; | |
119 | void __iomem *base; | |
a5462e5b MR |
120 | |
121 | unsigned int dma_chans[3]; | |
3bc43840 | 122 | |
3bc43840 GL |
123 | struct pxacamera_platform_data *pdata; |
124 | struct resource *res; | |
125 | unsigned long platform_flags; | |
126 | unsigned long platform_mclk_10khz; | |
127 | ||
128 | struct list_head capture; | |
129 | ||
130 | spinlock_t lock; | |
131 | ||
3bc43840 GL |
132 | struct pxa_buffer *active; |
133 | }; | |
134 | ||
135 | static const char *pxa_cam_driver_description = "PXA_Camera"; | |
136 | ||
137 | static unsigned int vid_limit = 16; /* Video memory limit, in Mb */ | |
138 | ||
139 | /* | |
140 | * Videobuf operations | |
141 | */ | |
7102b773 GL |
142 | static int pxa_videobuf_setup(struct videobuf_queue *vq, unsigned int *count, |
143 | unsigned int *size) | |
3bc43840 GL |
144 | { |
145 | struct soc_camera_device *icd = vq->priv_data; | |
146 | ||
147 | dev_dbg(&icd->dev, "count=%d, size=%d\n", *count, *size); | |
148 | ||
a5462e5b MR |
149 | /* planar capture requires Y, U and V buffers to be page aligned */ |
150 | if (icd->current_fmt->fourcc == V4L2_PIX_FMT_YUV422P) { | |
151 | *size = PAGE_ALIGN(icd->width * icd->height); /* Y pages */ | |
152 | *size += PAGE_ALIGN(icd->width * icd->height / 2); /* U pages */ | |
153 | *size += PAGE_ALIGN(icd->width * icd->height / 2); /* V pages */ | |
154 | } else { | |
155 | *size = icd->width * icd->height * | |
156 | ((icd->current_fmt->depth + 7) >> 3); | |
157 | } | |
3bc43840 GL |
158 | |
159 | if (0 == *count) | |
160 | *count = 32; | |
161 | while (*size * *count > vid_limit * 1024 * 1024) | |
162 | (*count)--; | |
163 | ||
164 | return 0; | |
165 | } | |
166 | ||
167 | static void free_buffer(struct videobuf_queue *vq, struct pxa_buffer *buf) | |
168 | { | |
169 | struct soc_camera_device *icd = vq->priv_data; | |
170 | struct soc_camera_host *ici = | |
171 | to_soc_camera_host(icd->dev.parent); | |
172 | struct pxa_camera_dev *pcdev = ici->priv; | |
173 | struct videobuf_dmabuf *dma = videobuf_to_dma(&buf->vb); | |
a5462e5b | 174 | int i; |
3bc43840 GL |
175 | |
176 | BUG_ON(in_interrupt()); | |
177 | ||
7e28adb2 | 178 | dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__, |
3bc43840 GL |
179 | &buf->vb, buf->vb.baddr, buf->vb.bsize); |
180 | ||
181 | /* This waits until this buffer is out of danger, i.e., until it is no | |
182 | * longer in STATE_QUEUED or STATE_ACTIVE */ | |
183 | videobuf_waiton(&buf->vb, 0, 0); | |
184 | videobuf_dma_unmap(vq, dma); | |
185 | videobuf_dma_free(dma); | |
186 | ||
a5462e5b MR |
187 | for (i = 0; i < ARRAY_SIZE(buf->dmas); i++) { |
188 | if (buf->dmas[i].sg_cpu) | |
189 | dma_free_coherent(pcdev->dev, buf->dmas[i].sg_size, | |
190 | buf->dmas[i].sg_cpu, | |
191 | buf->dmas[i].sg_dma); | |
192 | buf->dmas[i].sg_cpu = NULL; | |
193 | } | |
3bc43840 GL |
194 | |
195 | buf->vb.state = VIDEOBUF_NEEDS_INIT; | |
196 | } | |
197 | ||
a5462e5b MR |
198 | static int pxa_init_dma_channel(struct pxa_camera_dev *pcdev, |
199 | struct pxa_buffer *buf, | |
200 | struct videobuf_dmabuf *dma, int channel, | |
201 | int sglen, int sg_start, int cibr, | |
202 | unsigned int size) | |
203 | { | |
204 | struct pxa_cam_dma *pxa_dma = &buf->dmas[channel]; | |
205 | int i; | |
206 | ||
207 | if (pxa_dma->sg_cpu) | |
208 | dma_free_coherent(pcdev->dev, pxa_dma->sg_size, | |
209 | pxa_dma->sg_cpu, pxa_dma->sg_dma); | |
210 | ||
211 | pxa_dma->sg_size = (sglen + 1) * sizeof(struct pxa_dma_desc); | |
212 | pxa_dma->sg_cpu = dma_alloc_coherent(pcdev->dev, pxa_dma->sg_size, | |
213 | &pxa_dma->sg_dma, GFP_KERNEL); | |
214 | if (!pxa_dma->sg_cpu) | |
215 | return -ENOMEM; | |
216 | ||
217 | pxa_dma->sglen = sglen; | |
218 | ||
219 | for (i = 0; i < sglen; i++) { | |
220 | int sg_i = sg_start + i; | |
221 | struct scatterlist *sg = dma->sglist; | |
222 | unsigned int dma_len = sg_dma_len(&sg[sg_i]), xfer_len; | |
223 | ||
224 | pxa_dma->sg_cpu[i].dsadr = pcdev->res->start + cibr; | |
225 | pxa_dma->sg_cpu[i].dtadr = sg_dma_address(&sg[sg_i]); | |
226 | ||
227 | /* PXA27x Developer's Manual 27.4.4.1: round up to 8 bytes */ | |
228 | xfer_len = (min(dma_len, size) + 7) & ~7; | |
229 | ||
230 | pxa_dma->sg_cpu[i].dcmd = | |
231 | DCMD_FLOWSRC | DCMD_BURST8 | DCMD_INCTRGADDR | xfer_len; | |
232 | size -= dma_len; | |
233 | pxa_dma->sg_cpu[i].ddadr = | |
234 | pxa_dma->sg_dma + (i + 1) * sizeof(struct pxa_dma_desc); | |
235 | } | |
236 | ||
237 | pxa_dma->sg_cpu[sglen - 1].ddadr = DDADR_STOP; | |
238 | pxa_dma->sg_cpu[sglen - 1].dcmd |= DCMD_ENDIRQEN; | |
239 | ||
240 | return 0; | |
241 | } | |
242 | ||
7102b773 GL |
243 | static int pxa_videobuf_prepare(struct videobuf_queue *vq, |
244 | struct videobuf_buffer *vb, enum v4l2_field field) | |
3bc43840 GL |
245 | { |
246 | struct soc_camera_device *icd = vq->priv_data; | |
247 | struct soc_camera_host *ici = | |
248 | to_soc_camera_host(icd->dev.parent); | |
249 | struct pxa_camera_dev *pcdev = ici->priv; | |
250 | struct pxa_buffer *buf = container_of(vb, struct pxa_buffer, vb); | |
a5462e5b MR |
251 | int ret; |
252 | int sglen_y, sglen_yu = 0, sglen_u = 0, sglen_v = 0; | |
253 | int size_y, size_u = 0, size_v = 0; | |
3bc43840 | 254 | |
7e28adb2 | 255 | dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__, |
3bc43840 GL |
256 | vb, vb->baddr, vb->bsize); |
257 | ||
258 | /* Added list head initialization on alloc */ | |
259 | WARN_ON(!list_empty(&vb->queue)); | |
260 | ||
261 | #ifdef DEBUG | |
262 | /* This can be useful if you want to see if we actually fill | |
263 | * the buffer with something */ | |
264 | memset((void *)vb->baddr, 0xaa, vb->bsize); | |
265 | #endif | |
266 | ||
267 | BUG_ON(NULL == icd->current_fmt); | |
268 | ||
269 | /* I think, in buf_prepare you only have to protect global data, | |
270 | * the actual buffer is yours */ | |
271 | buf->inwork = 1; | |
272 | ||
273 | if (buf->fmt != icd->current_fmt || | |
274 | vb->width != icd->width || | |
275 | vb->height != icd->height || | |
276 | vb->field != field) { | |
277 | buf->fmt = icd->current_fmt; | |
278 | vb->width = icd->width; | |
279 | vb->height = icd->height; | |
280 | vb->field = field; | |
281 | vb->state = VIDEOBUF_NEEDS_INIT; | |
282 | } | |
283 | ||
284 | vb->size = vb->width * vb->height * ((buf->fmt->depth + 7) >> 3); | |
285 | if (0 != vb->baddr && vb->bsize < vb->size) { | |
286 | ret = -EINVAL; | |
287 | goto out; | |
288 | } | |
289 | ||
290 | if (vb->state == VIDEOBUF_NEEDS_INIT) { | |
291 | unsigned int size = vb->size; | |
292 | struct videobuf_dmabuf *dma = videobuf_to_dma(vb); | |
293 | ||
294 | ret = videobuf_iolock(vq, vb, NULL); | |
295 | if (ret) | |
296 | goto fail; | |
297 | ||
a5462e5b MR |
298 | if (buf->fmt->fourcc == V4L2_PIX_FMT_YUV422P) { |
299 | /* FIXME the calculations should be more precise */ | |
300 | sglen_y = dma->sglen / 2; | |
301 | sglen_u = sglen_v = dma->sglen / 4 + 1; | |
302 | sglen_yu = sglen_y + sglen_u; | |
303 | size_y = size / 2; | |
304 | size_u = size_v = size / 4; | |
305 | } else { | |
306 | sglen_y = dma->sglen; | |
307 | size_y = size; | |
308 | } | |
309 | ||
310 | /* init DMA for Y channel */ | |
311 | ret = pxa_init_dma_channel(pcdev, buf, dma, 0, sglen_y, | |
312 | 0, 0x28, size_y); | |
3bc43840 | 313 | |
a5462e5b MR |
314 | if (ret) { |
315 | dev_err(pcdev->dev, | |
316 | "DMA initialization for Y/RGB failed\n"); | |
3bc43840 GL |
317 | goto fail; |
318 | } | |
319 | ||
a5462e5b MR |
320 | if (buf->fmt->fourcc == V4L2_PIX_FMT_YUV422P) { |
321 | /* init DMA for U channel */ | |
322 | ret = pxa_init_dma_channel(pcdev, buf, dma, 1, sglen_u, | |
323 | sglen_y, 0x30, size_u); | |
324 | if (ret) { | |
325 | dev_err(pcdev->dev, | |
326 | "DMA initialization for U failed\n"); | |
327 | goto fail_u; | |
328 | } | |
329 | ||
330 | /* init DMA for V channel */ | |
331 | ret = pxa_init_dma_channel(pcdev, buf, dma, 2, sglen_v, | |
332 | sglen_yu, 0x38, size_v); | |
333 | if (ret) { | |
334 | dev_err(pcdev->dev, | |
335 | "DMA initialization for V failed\n"); | |
336 | goto fail_v; | |
337 | } | |
3bc43840 | 338 | } |
3bc43840 GL |
339 | |
340 | vb->state = VIDEOBUF_PREPARED; | |
341 | } | |
342 | ||
343 | buf->inwork = 0; | |
a5462e5b MR |
344 | buf->active_dma = DMA_Y; |
345 | if (buf->fmt->fourcc == V4L2_PIX_FMT_YUV422P) | |
346 | buf->active_dma |= DMA_U | DMA_V; | |
3bc43840 GL |
347 | |
348 | return 0; | |
349 | ||
a5462e5b MR |
350 | fail_v: |
351 | dma_free_coherent(pcdev->dev, buf->dmas[1].sg_size, | |
352 | buf->dmas[1].sg_cpu, buf->dmas[1].sg_dma); | |
353 | fail_u: | |
354 | dma_free_coherent(pcdev->dev, buf->dmas[0].sg_size, | |
355 | buf->dmas[0].sg_cpu, buf->dmas[0].sg_dma); | |
3bc43840 GL |
356 | fail: |
357 | free_buffer(vq, buf); | |
358 | out: | |
359 | buf->inwork = 0; | |
360 | return ret; | |
361 | } | |
362 | ||
7102b773 GL |
363 | static void pxa_videobuf_queue(struct videobuf_queue *vq, |
364 | struct videobuf_buffer *vb) | |
3bc43840 GL |
365 | { |
366 | struct soc_camera_device *icd = vq->priv_data; | |
367 | struct soc_camera_host *ici = | |
368 | to_soc_camera_host(icd->dev.parent); | |
369 | struct pxa_camera_dev *pcdev = ici->priv; | |
370 | struct pxa_buffer *buf = container_of(vb, struct pxa_buffer, vb); | |
7102b773 | 371 | struct pxa_buffer *active; |
3bc43840 GL |
372 | unsigned long flags; |
373 | ||
7e28adb2 | 374 | dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__, |
3bc43840 GL |
375 | vb, vb->baddr, vb->bsize); |
376 | spin_lock_irqsave(&pcdev->lock, flags); | |
377 | ||
378 | list_add_tail(&vb->queue, &pcdev->capture); | |
379 | ||
380 | vb->state = VIDEOBUF_ACTIVE; | |
7102b773 | 381 | active = pcdev->active; |
3bc43840 | 382 | |
7102b773 | 383 | if (!active) { |
3bc43840 | 384 | CIFR |= CIFR_RESET_F; |
a5462e5b MR |
385 | DDADR(pcdev->dma_chans[0]) = buf->dmas[0].sg_dma; |
386 | DCSR(pcdev->dma_chans[0]) = DCSR_RUN; | |
387 | ||
388 | if (buf->fmt->fourcc == V4L2_PIX_FMT_YUV422P) { | |
389 | DDADR(pcdev->dma_chans[1]) = buf->dmas[1].sg_dma; | |
390 | DCSR(pcdev->dma_chans[1]) = DCSR_RUN; | |
391 | ||
392 | DDADR(pcdev->dma_chans[2]) = buf->dmas[2].sg_dma; | |
393 | DCSR(pcdev->dma_chans[2]) = DCSR_RUN; | |
394 | } | |
395 | ||
3bc43840 GL |
396 | pcdev->active = buf; |
397 | CICR0 |= CICR0_ENB; | |
398 | } else { | |
a5462e5b MR |
399 | struct pxa_cam_dma *buf_dma; |
400 | struct pxa_cam_dma *act_dma; | |
401 | int channels = 1; | |
402 | int nents; | |
403 | int i; | |
404 | ||
405 | if (buf->fmt->fourcc == V4L2_PIX_FMT_YUV422P) | |
406 | channels = 3; | |
407 | ||
408 | for (i = 0; i < channels; i++) { | |
409 | buf_dma = &buf->dmas[i]; | |
410 | act_dma = &active->dmas[i]; | |
411 | nents = buf_dma->sglen; | |
412 | ||
413 | /* Stop DMA engine */ | |
414 | DCSR(pcdev->dma_chans[i]) = 0; | |
415 | ||
416 | /* Add the descriptors we just initialized to | |
417 | the currently running chain */ | |
418 | act_dma->sg_cpu[act_dma->sglen - 1].ddadr = | |
419 | buf_dma->sg_dma; | |
420 | ||
421 | /* Setup a dummy descriptor with the DMA engines current | |
422 | * state | |
3bc43840 | 423 | */ |
a5462e5b MR |
424 | buf_dma->sg_cpu[nents].dsadr = |
425 | pcdev->res->start + 0x28 + i*8; /* CIBRx */ | |
426 | buf_dma->sg_cpu[nents].dtadr = | |
427 | DTADR(pcdev->dma_chans[i]); | |
428 | buf_dma->sg_cpu[nents].dcmd = | |
429 | DCMD(pcdev->dma_chans[i]); | |
430 | ||
431 | if (DDADR(pcdev->dma_chans[i]) == DDADR_STOP) { | |
432 | /* The DMA engine is on the last | |
433 | descriptor, set the next descriptors | |
434 | address to the descriptors we just | |
435 | initialized */ | |
436 | buf_dma->sg_cpu[nents].ddadr = buf_dma->sg_dma; | |
437 | } else { | |
438 | buf_dma->sg_cpu[nents].ddadr = | |
439 | DDADR(pcdev->dma_chans[i]); | |
440 | } | |
441 | ||
442 | /* The next descriptor is the dummy descriptor */ | |
443 | DDADR(pcdev->dma_chans[i]) = buf_dma->sg_dma + nents * | |
444 | sizeof(struct pxa_dma_desc); | |
445 | ||
446 | DCSR(pcdev->dma_chans[i]) = DCSR_RUN; | |
3bc43840 | 447 | } |
3bc43840 | 448 | #ifdef DEBUG |
a5462e5b | 449 | if (CISR & (CISR_IFO_0 | CISR_IFO_1 | CISR_IFO_2)) { |
3bc43840 | 450 | dev_warn(pcdev->dev, "FIFO overrun\n"); |
a5462e5b MR |
451 | for (i = 0; i < channels; i++) |
452 | DDADR(pcdev->dma_chans[i]) = | |
453 | pcdev->active->dmas[i].sg_dma; | |
3bc43840 GL |
454 | |
455 | CICR0 &= ~CICR0_ENB; | |
456 | CIFR |= CIFR_RESET_F; | |
a5462e5b MR |
457 | for (i = 0; i < channels; i++) |
458 | DCSR(pcdev->dma_chans[i]) = DCSR_RUN; | |
3bc43840 | 459 | CICR0 |= CICR0_ENB; |
a5462e5b | 460 | } |
3bc43840 | 461 | #endif |
3bc43840 GL |
462 | } |
463 | ||
464 | spin_unlock_irqrestore(&pcdev->lock, flags); | |
3bc43840 GL |
465 | } |
466 | ||
467 | static void pxa_videobuf_release(struct videobuf_queue *vq, | |
468 | struct videobuf_buffer *vb) | |
469 | { | |
470 | struct pxa_buffer *buf = container_of(vb, struct pxa_buffer, vb); | |
471 | #ifdef DEBUG | |
472 | struct soc_camera_device *icd = vq->priv_data; | |
473 | ||
7e28adb2 | 474 | dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__, |
3bc43840 GL |
475 | vb, vb->baddr, vb->bsize); |
476 | ||
477 | switch (vb->state) { | |
478 | case VIDEOBUF_ACTIVE: | |
7e28adb2 | 479 | dev_dbg(&icd->dev, "%s (active)\n", __func__); |
3bc43840 GL |
480 | break; |
481 | case VIDEOBUF_QUEUED: | |
7e28adb2 | 482 | dev_dbg(&icd->dev, "%s (queued)\n", __func__); |
3bc43840 GL |
483 | break; |
484 | case VIDEOBUF_PREPARED: | |
7e28adb2 | 485 | dev_dbg(&icd->dev, "%s (prepared)\n", __func__); |
3bc43840 GL |
486 | break; |
487 | default: | |
7e28adb2 | 488 | dev_dbg(&icd->dev, "%s (unknown)\n", __func__); |
3bc43840 GL |
489 | break; |
490 | } | |
491 | #endif | |
492 | ||
493 | free_buffer(vq, buf); | |
494 | } | |
495 | ||
a5462e5b MR |
496 | static void pxa_camera_wakeup(struct pxa_camera_dev *pcdev, |
497 | struct videobuf_buffer *vb, | |
498 | struct pxa_buffer *buf) | |
499 | { | |
500 | /* _init is used to debug races, see comment in pxa_camera_reqbufs() */ | |
501 | list_del_init(&vb->queue); | |
502 | vb->state = VIDEOBUF_DONE; | |
503 | do_gettimeofday(&vb->ts); | |
504 | vb->field_count++; | |
505 | wake_up(&vb->done); | |
506 | ||
507 | if (list_empty(&pcdev->capture)) { | |
508 | pcdev->active = NULL; | |
509 | DCSR(pcdev->dma_chans[0]) = 0; | |
510 | DCSR(pcdev->dma_chans[1]) = 0; | |
511 | DCSR(pcdev->dma_chans[2]) = 0; | |
512 | CICR0 &= ~CICR0_ENB; | |
513 | return; | |
514 | } | |
515 | ||
516 | pcdev->active = list_entry(pcdev->capture.next, | |
517 | struct pxa_buffer, vb.queue); | |
518 | } | |
519 | ||
520 | static void pxa_camera_dma_irq(int channel, struct pxa_camera_dev *pcdev, | |
521 | enum pxa_camera_active_dma act_dma) | |
3bc43840 | 522 | { |
3bc43840 GL |
523 | struct pxa_buffer *buf; |
524 | unsigned long flags; | |
525 | unsigned int status; | |
526 | struct videobuf_buffer *vb; | |
527 | ||
528 | spin_lock_irqsave(&pcdev->lock, flags); | |
529 | ||
a5462e5b MR |
530 | status = DCSR(channel); |
531 | DCSR(channel) = status | DCSR_ENDINTR; | |
7102b773 | 532 | |
3bc43840 | 533 | if (status & DCSR_BUSERR) { |
7102b773 | 534 | dev_err(pcdev->dev, "DMA Bus Error IRQ!\n"); |
3bc43840 GL |
535 | goto out; |
536 | } | |
537 | ||
538 | if (!(status & DCSR_ENDINTR)) { | |
7102b773 GL |
539 | dev_err(pcdev->dev, "Unknown DMA IRQ source, " |
540 | "status: 0x%08x\n", status); | |
3bc43840 GL |
541 | goto out; |
542 | } | |
543 | ||
3bc43840 | 544 | if (!pcdev->active) { |
7102b773 | 545 | dev_err(pcdev->dev, "DMA End IRQ with no active buffer!\n"); |
3bc43840 GL |
546 | goto out; |
547 | } | |
548 | ||
549 | vb = &pcdev->active->vb; | |
550 | buf = container_of(vb, struct pxa_buffer, vb); | |
551 | WARN_ON(buf->inwork || list_empty(&vb->queue)); | |
7e28adb2 | 552 | dev_dbg(pcdev->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__, |
3bc43840 GL |
553 | vb, vb->baddr, vb->bsize); |
554 | ||
a5462e5b MR |
555 | buf->active_dma &= ~act_dma; |
556 | if (!buf->active_dma) | |
557 | pxa_camera_wakeup(pcdev, vb, buf); | |
3bc43840 GL |
558 | |
559 | out: | |
560 | spin_unlock_irqrestore(&pcdev->lock, flags); | |
561 | } | |
562 | ||
a5462e5b MR |
563 | static void pxa_camera_dma_irq_y(int channel, void *data) |
564 | { | |
565 | struct pxa_camera_dev *pcdev = data; | |
566 | pxa_camera_dma_irq(channel, pcdev, DMA_Y); | |
567 | } | |
568 | ||
569 | static void pxa_camera_dma_irq_u(int channel, void *data) | |
570 | { | |
571 | struct pxa_camera_dev *pcdev = data; | |
572 | pxa_camera_dma_irq(channel, pcdev, DMA_U); | |
573 | } | |
574 | ||
575 | static void pxa_camera_dma_irq_v(int channel, void *data) | |
576 | { | |
577 | struct pxa_camera_dev *pcdev = data; | |
578 | pxa_camera_dma_irq(channel, pcdev, DMA_V); | |
579 | } | |
580 | ||
7102b773 | 581 | static struct videobuf_queue_ops pxa_videobuf_ops = { |
3bc43840 GL |
582 | .buf_setup = pxa_videobuf_setup, |
583 | .buf_prepare = pxa_videobuf_prepare, | |
584 | .buf_queue = pxa_videobuf_queue, | |
585 | .buf_release = pxa_videobuf_release, | |
586 | }; | |
587 | ||
588 | static int mclk_get_divisor(struct pxa_camera_dev *pcdev) | |
589 | { | |
590 | unsigned int mclk_10khz = pcdev->platform_mclk_10khz; | |
591 | unsigned long div; | |
592 | unsigned long lcdclk; | |
593 | ||
594 | lcdclk = clk_get_rate(pcdev->clk) / 10000; | |
595 | ||
596 | /* We verify platform_mclk_10khz != 0, so if anyone breaks it, here | |
597 | * they get a nice Oops */ | |
598 | div = (lcdclk + 2 * mclk_10khz - 1) / (2 * mclk_10khz) - 1; | |
599 | ||
600 | dev_dbg(pcdev->dev, "LCD clock %lukHz, target freq %dkHz, " | |
601 | "divisor %lu\n", lcdclk * 10, mclk_10khz * 10, div); | |
602 | ||
603 | return div; | |
604 | } | |
605 | ||
7102b773 | 606 | static void pxa_camera_activate(struct pxa_camera_dev *pcdev) |
3bc43840 GL |
607 | { |
608 | struct pxacamera_platform_data *pdata = pcdev->pdata; | |
609 | u32 cicr4 = 0; | |
610 | ||
611 | dev_dbg(pcdev->dev, "Registered platform device at %p data %p\n", | |
612 | pcdev, pdata); | |
613 | ||
614 | if (pdata && pdata->init) { | |
7e28adb2 | 615 | dev_dbg(pcdev->dev, "%s: Init gpios\n", __func__); |
3bc43840 GL |
616 | pdata->init(pcdev->dev); |
617 | } | |
618 | ||
619 | if (pdata && pdata->power) { | |
7e28adb2 | 620 | dev_dbg(pcdev->dev, "%s: Power on camera\n", __func__); |
3bc43840 GL |
621 | pdata->power(pcdev->dev, 1); |
622 | } | |
623 | ||
624 | if (pdata && pdata->reset) { | |
625 | dev_dbg(pcdev->dev, "%s: Releasing camera reset\n", | |
7e28adb2 | 626 | __func__); |
3bc43840 GL |
627 | pdata->reset(pcdev->dev, 1); |
628 | } | |
629 | ||
630 | CICR0 = 0x3FF; /* disable all interrupts */ | |
631 | ||
632 | if (pcdev->platform_flags & PXA_CAMERA_PCLK_EN) | |
633 | cicr4 |= CICR4_PCLK_EN; | |
634 | if (pcdev->platform_flags & PXA_CAMERA_MCLK_EN) | |
635 | cicr4 |= CICR4_MCLK_EN; | |
636 | if (pcdev->platform_flags & PXA_CAMERA_PCP) | |
637 | cicr4 |= CICR4_PCP; | |
638 | if (pcdev->platform_flags & PXA_CAMERA_HSP) | |
639 | cicr4 |= CICR4_HSP; | |
640 | if (pcdev->platform_flags & PXA_CAMERA_VSP) | |
641 | cicr4 |= CICR4_VSP; | |
642 | ||
643 | CICR4 = mclk_get_divisor(pcdev) | cicr4; | |
644 | ||
645 | clk_enable(pcdev->clk); | |
646 | } | |
647 | ||
7102b773 | 648 | static void pxa_camera_deactivate(struct pxa_camera_dev *pcdev) |
3bc43840 GL |
649 | { |
650 | struct pxacamera_platform_data *board = pcdev->pdata; | |
651 | ||
652 | clk_disable(pcdev->clk); | |
653 | ||
654 | if (board && board->reset) { | |
655 | dev_dbg(pcdev->dev, "%s: Asserting camera reset\n", | |
7e28adb2 | 656 | __func__); |
3bc43840 GL |
657 | board->reset(pcdev->dev, 0); |
658 | } | |
659 | ||
660 | if (board && board->power) { | |
7e28adb2 | 661 | dev_dbg(pcdev->dev, "%s: Power off camera\n", __func__); |
3bc43840 GL |
662 | board->power(pcdev->dev, 0); |
663 | } | |
664 | } | |
665 | ||
666 | static irqreturn_t pxa_camera_irq(int irq, void *data) | |
667 | { | |
668 | struct pxa_camera_dev *pcdev = data; | |
669 | unsigned int status = CISR; | |
670 | ||
671 | dev_dbg(pcdev->dev, "Camera interrupt status 0x%x\n", status); | |
672 | ||
673 | CISR = status; | |
3bc43840 GL |
674 | return IRQ_HANDLED; |
675 | } | |
676 | ||
677 | /* The following two functions absolutely depend on the fact, that | |
678 | * there can be only one camera on PXA quick capture interface */ | |
7102b773 | 679 | static int pxa_camera_add_device(struct soc_camera_device *icd) |
3bc43840 GL |
680 | { |
681 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
682 | struct pxa_camera_dev *pcdev = ici->priv; | |
683 | int ret; | |
684 | ||
685 | mutex_lock(&camera_lock); | |
686 | ||
687 | if (pcdev->icd) { | |
688 | ret = -EBUSY; | |
689 | goto ebusy; | |
690 | } | |
691 | ||
692 | dev_info(&icd->dev, "PXA Camera driver attached to camera %d\n", | |
693 | icd->devnum); | |
694 | ||
7102b773 | 695 | pxa_camera_activate(pcdev); |
3bc43840 GL |
696 | ret = icd->ops->init(icd); |
697 | ||
698 | if (!ret) | |
699 | pcdev->icd = icd; | |
700 | ||
701 | ebusy: | |
702 | mutex_unlock(&camera_lock); | |
703 | ||
704 | return ret; | |
705 | } | |
706 | ||
7102b773 | 707 | static void pxa_camera_remove_device(struct soc_camera_device *icd) |
3bc43840 GL |
708 | { |
709 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
710 | struct pxa_camera_dev *pcdev = ici->priv; | |
711 | ||
712 | BUG_ON(icd != pcdev->icd); | |
713 | ||
714 | dev_info(&icd->dev, "PXA Camera driver detached from camera %d\n", | |
715 | icd->devnum); | |
716 | ||
717 | /* disable capture, disable interrupts */ | |
718 | CICR0 = 0x3ff; | |
a5462e5b | 719 | |
3bc43840 | 720 | /* Stop DMA engine */ |
a5462e5b MR |
721 | DCSR(pcdev->dma_chans[0]) = 0; |
722 | DCSR(pcdev->dma_chans[1]) = 0; | |
723 | DCSR(pcdev->dma_chans[2]) = 0; | |
3bc43840 GL |
724 | |
725 | icd->ops->release(icd); | |
726 | ||
7102b773 | 727 | pxa_camera_deactivate(pcdev); |
3bc43840 GL |
728 | |
729 | pcdev->icd = NULL; | |
730 | } | |
731 | ||
ad5f2e85 GL |
732 | static int test_platform_param(struct pxa_camera_dev *pcdev, |
733 | unsigned char buswidth, unsigned long *flags) | |
3bc43840 | 734 | { |
ad5f2e85 GL |
735 | /* |
736 | * Platform specified synchronization and pixel clock polarities are | |
737 | * only a recommendation and are only used during probing. The PXA270 | |
738 | * quick capture interface supports both. | |
739 | */ | |
740 | *flags = (pcdev->platform_flags & PXA_CAMERA_MASTER ? | |
741 | SOCAM_MASTER : SOCAM_SLAVE) | | |
742 | SOCAM_HSYNC_ACTIVE_HIGH | | |
743 | SOCAM_HSYNC_ACTIVE_LOW | | |
744 | SOCAM_VSYNC_ACTIVE_HIGH | | |
745 | SOCAM_VSYNC_ACTIVE_LOW | | |
746 | SOCAM_PCLK_SAMPLE_RISING | | |
747 | SOCAM_PCLK_SAMPLE_FALLING; | |
3bc43840 GL |
748 | |
749 | /* If requested data width is supported by the platform, use it */ | |
ad5f2e85 | 750 | switch (buswidth) { |
3bc43840 | 751 | case 10: |
ad5f2e85 GL |
752 | if (!(pcdev->platform_flags & PXA_CAMERA_DATAWIDTH_10)) |
753 | return -EINVAL; | |
754 | *flags |= SOCAM_DATAWIDTH_10; | |
3bc43840 GL |
755 | break; |
756 | case 9: | |
ad5f2e85 GL |
757 | if (!(pcdev->platform_flags & PXA_CAMERA_DATAWIDTH_9)) |
758 | return -EINVAL; | |
759 | *flags |= SOCAM_DATAWIDTH_9; | |
3bc43840 GL |
760 | break; |
761 | case 8: | |
ad5f2e85 GL |
762 | if (!(pcdev->platform_flags & PXA_CAMERA_DATAWIDTH_8)) |
763 | return -EINVAL; | |
764 | *flags |= SOCAM_DATAWIDTH_8; | |
3bc43840 | 765 | } |
ad5f2e85 GL |
766 | |
767 | return 0; | |
768 | } | |
769 | ||
770 | static int pxa_camera_set_bus_param(struct soc_camera_device *icd, __u32 pixfmt) | |
771 | { | |
772 | struct soc_camera_host *ici = | |
773 | to_soc_camera_host(icd->dev.parent); | |
774 | struct pxa_camera_dev *pcdev = ici->priv; | |
775 | unsigned long dw, bpp, bus_flags, camera_flags, common_flags; | |
a5462e5b | 776 | u32 cicr0, cicr1, cicr4 = 0; |
ad5f2e85 GL |
777 | int ret = test_platform_param(pcdev, icd->buswidth, &bus_flags); |
778 | ||
779 | if (ret < 0) | |
780 | return ret; | |
781 | ||
782 | camera_flags = icd->ops->query_bus_param(icd); | |
783 | ||
784 | common_flags = soc_camera_bus_param_compatible(camera_flags, bus_flags); | |
785 | if (!common_flags) | |
3bc43840 GL |
786 | return -EINVAL; |
787 | ||
ad5f2e85 GL |
788 | /* Make choises, based on platform preferences */ |
789 | if ((common_flags & SOCAM_HSYNC_ACTIVE_HIGH) && | |
790 | (common_flags & SOCAM_HSYNC_ACTIVE_LOW)) { | |
791 | if (pcdev->platform_flags & PXA_CAMERA_HSP) | |
792 | common_flags &= ~SOCAM_HSYNC_ACTIVE_HIGH; | |
793 | else | |
794 | common_flags &= ~SOCAM_HSYNC_ACTIVE_LOW; | |
795 | } | |
796 | ||
797 | if ((common_flags & SOCAM_VSYNC_ACTIVE_HIGH) && | |
798 | (common_flags & SOCAM_VSYNC_ACTIVE_LOW)) { | |
799 | if (pcdev->platform_flags & PXA_CAMERA_VSP) | |
800 | common_flags &= ~SOCAM_VSYNC_ACTIVE_HIGH; | |
801 | else | |
802 | common_flags &= ~SOCAM_VSYNC_ACTIVE_LOW; | |
803 | } | |
804 | ||
805 | if ((common_flags & SOCAM_PCLK_SAMPLE_RISING) && | |
806 | (common_flags & SOCAM_PCLK_SAMPLE_FALLING)) { | |
807 | if (pcdev->platform_flags & PXA_CAMERA_PCP) | |
808 | common_flags &= ~SOCAM_PCLK_SAMPLE_RISING; | |
809 | else | |
810 | common_flags &= ~SOCAM_PCLK_SAMPLE_FALLING; | |
811 | } | |
812 | ||
813 | ret = icd->ops->set_bus_param(icd, common_flags); | |
3bc43840 GL |
814 | if (ret < 0) |
815 | return ret; | |
816 | ||
817 | /* Datawidth is now guaranteed to be equal to one of the three values. | |
818 | * We fix bit-per-pixel equal to data-width... */ | |
ad5f2e85 GL |
819 | switch (common_flags & SOCAM_DATAWIDTH_MASK) { |
820 | case SOCAM_DATAWIDTH_10: | |
821 | icd->buswidth = 10; | |
3bc43840 GL |
822 | dw = 4; |
823 | bpp = 0x40; | |
824 | break; | |
ad5f2e85 GL |
825 | case SOCAM_DATAWIDTH_9: |
826 | icd->buswidth = 9; | |
3bc43840 GL |
827 | dw = 3; |
828 | bpp = 0x20; | |
829 | break; | |
830 | default: | |
831 | /* Actually it can only be 8 now, | |
832 | * default is just to silence compiler warnings */ | |
ad5f2e85 GL |
833 | case SOCAM_DATAWIDTH_8: |
834 | icd->buswidth = 8; | |
3bc43840 GL |
835 | dw = 2; |
836 | bpp = 0; | |
837 | } | |
838 | ||
839 | if (pcdev->platform_flags & PXA_CAMERA_PCLK_EN) | |
840 | cicr4 |= CICR4_PCLK_EN; | |
841 | if (pcdev->platform_flags & PXA_CAMERA_MCLK_EN) | |
842 | cicr4 |= CICR4_MCLK_EN; | |
ad5f2e85 | 843 | if (common_flags & SOCAM_PCLK_SAMPLE_FALLING) |
3bc43840 | 844 | cicr4 |= CICR4_PCP; |
ad5f2e85 | 845 | if (common_flags & SOCAM_HSYNC_ACTIVE_LOW) |
3bc43840 | 846 | cicr4 |= CICR4_HSP; |
ad5f2e85 | 847 | if (common_flags & SOCAM_VSYNC_ACTIVE_LOW) |
3bc43840 GL |
848 | cicr4 |= CICR4_VSP; |
849 | ||
850 | cicr0 = CICR0; | |
851 | if (cicr0 & CICR0_ENB) | |
852 | CICR0 = cicr0 & ~CICR0_ENB; | |
a5462e5b MR |
853 | |
854 | cicr1 = CICR1_PPL_VAL(icd->width - 1) | bpp | dw; | |
855 | ||
856 | switch (pixfmt) { | |
857 | case V4L2_PIX_FMT_YUV422P: | |
858 | cicr1 |= CICR1_YCBCR_F; | |
859 | case V4L2_PIX_FMT_YUYV: | |
860 | cicr1 |= CICR1_COLOR_SP_VAL(2); | |
861 | break; | |
862 | case V4L2_PIX_FMT_RGB555: | |
863 | cicr1 |= CICR1_RGB_BPP_VAL(1) | CICR1_RGBT_CONV_VAL(2) | | |
864 | CICR1_TBIT | CICR1_COLOR_SP_VAL(1); | |
865 | break; | |
866 | case V4L2_PIX_FMT_RGB565: | |
867 | cicr1 |= CICR1_COLOR_SP_VAL(1) | CICR1_RGB_BPP_VAL(2); | |
868 | break; | |
869 | } | |
870 | ||
871 | CICR1 = cicr1; | |
3bc43840 | 872 | CICR2 = 0; |
ad5f2e85 | 873 | CICR3 = CICR3_LPF_VAL(icd->height - 1) | |
3bc43840 GL |
874 | CICR3_BFW_VAL(min((unsigned short)255, icd->y_skip_top)); |
875 | CICR4 = mclk_get_divisor(pcdev) | cicr4; | |
876 | ||
877 | /* CIF interrupts are not used, only DMA */ | |
878 | CICR0 = (pcdev->platform_flags & PXA_CAMERA_MASTER ? | |
7102b773 | 879 | CICR0_SIM_MP : (CICR0_SL_CAP_EN | CICR0_SIM_SP)) | |
3bc43840 GL |
880 | CICR0_DMAEN | CICR0_IRQ_MASK | (cicr0 & CICR0_ENB); |
881 | ||
882 | return 0; | |
883 | } | |
884 | ||
ad5f2e85 GL |
885 | static int pxa_camera_try_bus_param(struct soc_camera_device *icd, __u32 pixfmt) |
886 | { | |
887 | struct soc_camera_host *ici = | |
888 | to_soc_camera_host(icd->dev.parent); | |
889 | struct pxa_camera_dev *pcdev = ici->priv; | |
890 | unsigned long bus_flags, camera_flags; | |
891 | int ret = test_platform_param(pcdev, icd->buswidth, &bus_flags); | |
892 | ||
893 | if (ret < 0) | |
894 | return ret; | |
895 | ||
896 | camera_flags = icd->ops->query_bus_param(icd); | |
897 | ||
898 | return soc_camera_bus_param_compatible(camera_flags, bus_flags) ? 0 : -EINVAL; | |
899 | } | |
900 | ||
901 | static int pxa_camera_set_fmt_cap(struct soc_camera_device *icd, | |
902 | __u32 pixfmt, struct v4l2_rect *rect) | |
903 | { | |
904 | return icd->ops->set_fmt_cap(icd, pixfmt, rect); | |
905 | } | |
906 | ||
907 | static int pxa_camera_try_fmt_cap(struct soc_camera_device *icd, | |
7102b773 | 908 | struct v4l2_format *f) |
3bc43840 GL |
909 | { |
910 | /* limit to pxa hardware capabilities */ | |
911 | if (f->fmt.pix.height < 32) | |
912 | f->fmt.pix.height = 32; | |
913 | if (f->fmt.pix.height > 2048) | |
914 | f->fmt.pix.height = 2048; | |
915 | if (f->fmt.pix.width < 48) | |
916 | f->fmt.pix.width = 48; | |
917 | if (f->fmt.pix.width > 2048) | |
918 | f->fmt.pix.width = 2048; | |
919 | f->fmt.pix.width &= ~0x01; | |
920 | ||
ad5f2e85 GL |
921 | /* limit to sensor capabilities */ |
922 | return icd->ops->try_fmt_cap(icd, f); | |
3bc43840 GL |
923 | } |
924 | ||
7102b773 GL |
925 | static int pxa_camera_reqbufs(struct soc_camera_file *icf, |
926 | struct v4l2_requestbuffers *p) | |
3bc43840 GL |
927 | { |
928 | int i; | |
929 | ||
930 | /* This is for locking debugging only. I removed spinlocks and now I | |
931 | * check whether .prepare is ever called on a linked buffer, or whether | |
932 | * a dma IRQ can occur for an in-work or unlinked buffer. Until now | |
933 | * it hadn't triggered */ | |
934 | for (i = 0; i < p->count; i++) { | |
935 | struct pxa_buffer *buf = container_of(icf->vb_vidq.bufs[i], | |
936 | struct pxa_buffer, vb); | |
937 | buf->inwork = 0; | |
938 | INIT_LIST_HEAD(&buf->vb.queue); | |
939 | } | |
940 | ||
941 | return 0; | |
942 | } | |
943 | ||
7102b773 | 944 | static unsigned int pxa_camera_poll(struct file *file, poll_table *pt) |
3bc43840 GL |
945 | { |
946 | struct soc_camera_file *icf = file->private_data; | |
947 | struct pxa_buffer *buf; | |
948 | ||
949 | buf = list_entry(icf->vb_vidq.stream.next, struct pxa_buffer, | |
950 | vb.stream); | |
951 | ||
952 | poll_wait(file, &buf->vb.done, pt); | |
953 | ||
954 | if (buf->vb.state == VIDEOBUF_DONE || | |
955 | buf->vb.state == VIDEOBUF_ERROR) | |
956 | return POLLIN|POLLRDNORM; | |
957 | ||
958 | return 0; | |
959 | } | |
960 | ||
7102b773 GL |
961 | static int pxa_camera_querycap(struct soc_camera_host *ici, |
962 | struct v4l2_capability *cap) | |
3bc43840 GL |
963 | { |
964 | /* cap->name is set by the firendly caller:-> */ | |
965 | strlcpy(cap->card, pxa_cam_driver_description, sizeof(cap->card)); | |
966 | cap->version = PXA_CAM_VERSION_CODE; | |
967 | cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; | |
968 | ||
969 | return 0; | |
970 | } | |
971 | ||
1a0063a9 GL |
972 | static spinlock_t *pxa_camera_spinlock_alloc(struct soc_camera_file *icf) |
973 | { | |
974 | struct soc_camera_host *ici = | |
975 | to_soc_camera_host(icf->icd->dev.parent); | |
976 | struct pxa_camera_dev *pcdev = ici->priv; | |
977 | ||
978 | return &pcdev->lock; | |
979 | } | |
980 | ||
b8d9904c GL |
981 | static struct soc_camera_host_ops pxa_soc_camera_host_ops = { |
982 | .owner = THIS_MODULE, | |
983 | .add = pxa_camera_add_device, | |
984 | .remove = pxa_camera_remove_device, | |
985 | .set_fmt_cap = pxa_camera_set_fmt_cap, | |
986 | .try_fmt_cap = pxa_camera_try_fmt_cap, | |
987 | .reqbufs = pxa_camera_reqbufs, | |
988 | .poll = pxa_camera_poll, | |
989 | .querycap = pxa_camera_querycap, | |
990 | .try_bus_param = pxa_camera_try_bus_param, | |
991 | .set_bus_param = pxa_camera_set_bus_param, | |
1a0063a9 | 992 | .spinlock_alloc = pxa_camera_spinlock_alloc, |
b8d9904c GL |
993 | }; |
994 | ||
995 | /* Should be allocated dynamically too, but we have only one. */ | |
3bc43840 GL |
996 | static struct soc_camera_host pxa_soc_camera_host = { |
997 | .drv_name = PXA_CAM_DRV_NAME, | |
7102b773 | 998 | .vbq_ops = &pxa_videobuf_ops, |
3bc43840 | 999 | .msize = sizeof(struct pxa_buffer), |
b8d9904c | 1000 | .ops = &pxa_soc_camera_host_ops, |
3bc43840 GL |
1001 | }; |
1002 | ||
1003 | static int pxa_camera_probe(struct platform_device *pdev) | |
1004 | { | |
1005 | struct pxa_camera_dev *pcdev; | |
1006 | struct resource *res; | |
1007 | void __iomem *base; | |
1008 | unsigned int irq; | |
1009 | int err = 0; | |
1010 | ||
1011 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1012 | irq = platform_get_irq(pdev, 0); | |
1013 | if (!res || !irq) { | |
1014 | err = -ENODEV; | |
1015 | goto exit; | |
1016 | } | |
1017 | ||
1018 | pcdev = kzalloc(sizeof(*pcdev), GFP_KERNEL); | |
1019 | if (!pcdev) { | |
7102b773 | 1020 | dev_err(&pdev->dev, "Could not allocate pcdev\n"); |
3bc43840 GL |
1021 | err = -ENOMEM; |
1022 | goto exit; | |
1023 | } | |
1024 | ||
1025 | pcdev->clk = clk_get(&pdev->dev, "CAMCLK"); | |
1026 | if (IS_ERR(pcdev->clk)) { | |
1027 | err = PTR_ERR(pcdev->clk); | |
1028 | goto exit_kfree; | |
1029 | } | |
1030 | ||
1031 | dev_set_drvdata(&pdev->dev, pcdev); | |
1032 | pcdev->res = res; | |
1033 | ||
1034 | pcdev->pdata = pdev->dev.platform_data; | |
1035 | pcdev->platform_flags = pcdev->pdata->flags; | |
ad5f2e85 GL |
1036 | if (!(pcdev->platform_flags & (PXA_CAMERA_DATAWIDTH_8 | |
1037 | PXA_CAMERA_DATAWIDTH_9 | PXA_CAMERA_DATAWIDTH_10))) { | |
3bc43840 GL |
1038 | /* Platform hasn't set available data widths. This is bad. |
1039 | * Warn and use a default. */ | |
1040 | dev_warn(&pdev->dev, "WARNING! Platform hasn't set available " | |
1041 | "data widths, using default 10 bit\n"); | |
1042 | pcdev->platform_flags |= PXA_CAMERA_DATAWIDTH_10; | |
1043 | } | |
1044 | pcdev->platform_mclk_10khz = pcdev->pdata->mclk_10khz; | |
1045 | if (!pcdev->platform_mclk_10khz) { | |
1046 | dev_warn(&pdev->dev, | |
1047 | "mclk_10khz == 0! Please, fix your platform data. " | |
1048 | "Using default 20MHz\n"); | |
1049 | pcdev->platform_mclk_10khz = 2000; | |
1050 | } | |
1051 | ||
1052 | INIT_LIST_HEAD(&pcdev->capture); | |
1053 | spin_lock_init(&pcdev->lock); | |
1054 | ||
1055 | /* | |
1056 | * Request the regions. | |
1057 | */ | |
1058 | if (!request_mem_region(res->start, res->end - res->start + 1, | |
1059 | PXA_CAM_DRV_NAME)) { | |
1060 | err = -EBUSY; | |
1061 | goto exit_clk; | |
1062 | } | |
1063 | ||
1064 | base = ioremap(res->start, res->end - res->start + 1); | |
1065 | if (!base) { | |
1066 | err = -ENOMEM; | |
1067 | goto exit_release; | |
1068 | } | |
1069 | pcdev->irq = irq; | |
1070 | pcdev->base = base; | |
1071 | pcdev->dev = &pdev->dev; | |
1072 | ||
1073 | /* request dma */ | |
a5462e5b MR |
1074 | pcdev->dma_chans[0] = pxa_request_dma("CI_Y", DMA_PRIO_HIGH, |
1075 | pxa_camera_dma_irq_y, pcdev); | |
1076 | if (pcdev->dma_chans[0] < 0) { | |
3bc43840 GL |
1077 | dev_err(pcdev->dev, "Can't request DMA for Y\n"); |
1078 | err = -ENOMEM; | |
1079 | goto exit_iounmap; | |
1080 | } | |
a5462e5b MR |
1081 | dev_dbg(pcdev->dev, "got DMA channel %d\n", pcdev->dma_chans[0]); |
1082 | ||
1083 | pcdev->dma_chans[1] = pxa_request_dma("CI_U", DMA_PRIO_HIGH, | |
1084 | pxa_camera_dma_irq_u, pcdev); | |
1085 | if (pcdev->dma_chans[1] < 0) { | |
1086 | dev_err(pcdev->dev, "Can't request DMA for U\n"); | |
1087 | err = -ENOMEM; | |
1088 | goto exit_free_dma_y; | |
1089 | } | |
1090 | dev_dbg(pcdev->dev, "got DMA channel (U) %d\n", pcdev->dma_chans[1]); | |
1091 | ||
1092 | pcdev->dma_chans[2] = pxa_request_dma("CI_V", DMA_PRIO_HIGH, | |
1093 | pxa_camera_dma_irq_v, pcdev); | |
1094 | if (pcdev->dma_chans[0] < 0) { | |
1095 | dev_err(pcdev->dev, "Can't request DMA for V\n"); | |
1096 | err = -ENOMEM; | |
1097 | goto exit_free_dma_u; | |
1098 | } | |
1099 | dev_dbg(pcdev->dev, "got DMA channel (V) %d\n", pcdev->dma_chans[2]); | |
3bc43840 | 1100 | |
a5462e5b MR |
1101 | DRCMR68 = pcdev->dma_chans[0] | DRCMR_MAPVLD; |
1102 | DRCMR69 = pcdev->dma_chans[1] | DRCMR_MAPVLD; | |
1103 | DRCMR70 = pcdev->dma_chans[2] | DRCMR_MAPVLD; | |
3bc43840 GL |
1104 | |
1105 | /* request irq */ | |
1106 | err = request_irq(pcdev->irq, pxa_camera_irq, 0, PXA_CAM_DRV_NAME, | |
1107 | pcdev); | |
1108 | if (err) { | |
1109 | dev_err(pcdev->dev, "Camera interrupt register failed \n"); | |
1110 | goto exit_free_dma; | |
1111 | } | |
1112 | ||
1113 | pxa_soc_camera_host.priv = pcdev; | |
1114 | pxa_soc_camera_host.dev.parent = &pdev->dev; | |
1115 | pxa_soc_camera_host.nr = pdev->id; | |
b8d9904c | 1116 | err = soc_camera_host_register(&pxa_soc_camera_host); |
3bc43840 GL |
1117 | if (err) |
1118 | goto exit_free_irq; | |
1119 | ||
1120 | return 0; | |
1121 | ||
1122 | exit_free_irq: | |
1123 | free_irq(pcdev->irq, pcdev); | |
1124 | exit_free_dma: | |
a5462e5b MR |
1125 | pxa_free_dma(pcdev->dma_chans[2]); |
1126 | exit_free_dma_u: | |
1127 | pxa_free_dma(pcdev->dma_chans[1]); | |
1128 | exit_free_dma_y: | |
1129 | pxa_free_dma(pcdev->dma_chans[0]); | |
3bc43840 GL |
1130 | exit_iounmap: |
1131 | iounmap(base); | |
1132 | exit_release: | |
1133 | release_mem_region(res->start, res->end - res->start + 1); | |
1134 | exit_clk: | |
1135 | clk_put(pcdev->clk); | |
1136 | exit_kfree: | |
1137 | kfree(pcdev); | |
1138 | exit: | |
1139 | return err; | |
1140 | } | |
1141 | ||
1142 | static int __devexit pxa_camera_remove(struct platform_device *pdev) | |
1143 | { | |
1144 | struct pxa_camera_dev *pcdev = platform_get_drvdata(pdev); | |
1145 | struct resource *res; | |
1146 | ||
1147 | clk_put(pcdev->clk); | |
1148 | ||
a5462e5b MR |
1149 | pxa_free_dma(pcdev->dma_chans[0]); |
1150 | pxa_free_dma(pcdev->dma_chans[1]); | |
1151 | pxa_free_dma(pcdev->dma_chans[2]); | |
3bc43840 GL |
1152 | free_irq(pcdev->irq, pcdev); |
1153 | ||
1154 | soc_camera_host_unregister(&pxa_soc_camera_host); | |
1155 | ||
1156 | iounmap(pcdev->base); | |
1157 | ||
1158 | res = pcdev->res; | |
1159 | release_mem_region(res->start, res->end - res->start + 1); | |
1160 | ||
1161 | kfree(pcdev); | |
1162 | ||
7102b773 | 1163 | dev_info(&pdev->dev, "PXA Camera driver unloaded\n"); |
3bc43840 | 1164 | |
3bc43840 GL |
1165 | return 0; |
1166 | } | |
1167 | ||
3bc43840 GL |
1168 | static struct platform_driver pxa_camera_driver = { |
1169 | .driver = { | |
1170 | .name = PXA_CAM_DRV_NAME, | |
1171 | }, | |
1172 | .probe = pxa_camera_probe, | |
1173 | .remove = __exit_p(pxa_camera_remove), | |
3bc43840 GL |
1174 | }; |
1175 | ||
1176 | ||
1177 | static int __devinit pxa_camera_init(void) | |
1178 | { | |
1179 | return platform_driver_register(&pxa_camera_driver); | |
1180 | } | |
1181 | ||
1182 | static void __exit pxa_camera_exit(void) | |
1183 | { | |
1184 | return platform_driver_unregister(&pxa_camera_driver); | |
1185 | } | |
1186 | ||
1187 | module_init(pxa_camera_init); | |
1188 | module_exit(pxa_camera_exit); | |
1189 | ||
1190 | MODULE_DESCRIPTION("PXA27x SoC Camera Host driver"); | |
1191 | MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>"); | |
1192 | MODULE_LICENSE("GPL"); |