Commit | Line | Data |
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0d3244d6 MD |
1 | /* |
2 | * V4L2 Driver for SuperH Mobile CEU interface | |
3 | * | |
4 | * Copyright (C) 2008 Magnus Damm | |
5 | * | |
6 | * Based on V4L2 Driver for PXA camera host - "pxa_camera.c", | |
7 | * | |
8 | * Copyright (C) 2006, Sascha Hauer, Pengutronix | |
9 | * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de> | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License as published by | |
13 | * the Free Software Foundation; either version 2 of the License, or | |
14 | * (at your option) any later version. | |
15 | */ | |
16 | ||
17 | #include <linux/init.h> | |
18 | #include <linux/module.h> | |
19 | #include <linux/io.h> | |
20 | #include <linux/delay.h> | |
21 | #include <linux/dma-mapping.h> | |
22 | #include <linux/errno.h> | |
23 | #include <linux/fs.h> | |
24 | #include <linux/interrupt.h> | |
25 | #include <linux/kernel.h> | |
26 | #include <linux/mm.h> | |
27 | #include <linux/moduleparam.h> | |
28 | #include <linux/time.h> | |
29 | #include <linux/version.h> | |
30 | #include <linux/device.h> | |
31 | #include <linux/platform_device.h> | |
0d3244d6 | 32 | #include <linux/videodev2.h> |
a42b6dd6 | 33 | #include <linux/clk.h> |
0d3244d6 MD |
34 | |
35 | #include <media/v4l2-common.h> | |
36 | #include <media/v4l2-dev.h> | |
37 | #include <media/soc_camera.h> | |
38 | #include <media/sh_mobile_ceu.h> | |
39 | #include <media/videobuf-dma-contig.h> | |
40 | ||
41 | /* register offsets for sh7722 / sh7723 */ | |
42 | ||
dd54203b MD |
43 | #define CAPSR 0x00 /* Capture start register */ |
44 | #define CAPCR 0x04 /* Capture control register */ | |
45 | #define CAMCR 0x08 /* Capture interface control register */ | |
46 | #define CMCYR 0x0c /* Capture interface cycle register */ | |
47 | #define CAMOR 0x10 /* Capture interface offset register */ | |
48 | #define CAPWR 0x14 /* Capture interface width register */ | |
49 | #define CAIFR 0x18 /* Capture interface input format register */ | |
50 | #define CSTCR 0x20 /* Camera strobe control register (<= sh7722) */ | |
51 | #define CSECR 0x24 /* Camera strobe emission count register (<= sh7722) */ | |
52 | #define CRCNTR 0x28 /* CEU register control register */ | |
53 | #define CRCMPR 0x2c /* CEU register forcible control register */ | |
54 | #define CFLCR 0x30 /* Capture filter control register */ | |
55 | #define CFSZR 0x34 /* Capture filter size clip register */ | |
56 | #define CDWDR 0x38 /* Capture destination width register */ | |
57 | #define CDAYR 0x3c /* Capture data address Y register */ | |
58 | #define CDACR 0x40 /* Capture data address C register */ | |
59 | #define CDBYR 0x44 /* Capture data bottom-field address Y register */ | |
60 | #define CDBCR 0x48 /* Capture data bottom-field address C register */ | |
61 | #define CBDSR 0x4c /* Capture bundle destination size register */ | |
62 | #define CFWCR 0x5c /* Firewall operation control register */ | |
63 | #define CLFCR 0x60 /* Capture low-pass filter control register */ | |
64 | #define CDOCR 0x64 /* Capture data output control register */ | |
65 | #define CDDCR 0x68 /* Capture data complexity level register */ | |
66 | #define CDDAR 0x6c /* Capture data complexity level address register */ | |
67 | #define CEIER 0x70 /* Capture event interrupt enable register */ | |
68 | #define CETCR 0x74 /* Capture event flag clear register */ | |
69 | #define CSTSR 0x7c /* Capture status register */ | |
70 | #define CSRTR 0x80 /* Capture software reset register */ | |
71 | #define CDSSR 0x84 /* Capture data size register */ | |
72 | #define CDAYR2 0x90 /* Capture data address Y register 2 */ | |
73 | #define CDACR2 0x94 /* Capture data address C register 2 */ | |
74 | #define CDBYR2 0x98 /* Capture data bottom-field address Y register 2 */ | |
75 | #define CDBCR2 0x9c /* Capture data bottom-field address C register 2 */ | |
0d3244d6 | 76 | |
0d3244d6 MD |
77 | /* per video frame buffer */ |
78 | struct sh_mobile_ceu_buffer { | |
79 | struct videobuf_buffer vb; /* v4l buffer must be first */ | |
80 | const struct soc_camera_data_format *fmt; | |
81 | }; | |
82 | ||
83 | struct sh_mobile_ceu_dev { | |
84 | struct device *dev; | |
85 | struct soc_camera_host ici; | |
86 | struct soc_camera_device *icd; | |
87 | ||
88 | unsigned int irq; | |
89 | void __iomem *base; | |
a42b6dd6 | 90 | struct clk *clk; |
0d3244d6 MD |
91 | unsigned long video_limit; |
92 | ||
c60f2b5c | 93 | /* lock used to protect videobuf */ |
0d3244d6 MD |
94 | spinlock_t lock; |
95 | struct list_head capture; | |
96 | struct videobuf_buffer *active; | |
97 | ||
98 | struct sh_mobile_ceu_info *pdata; | |
99 | }; | |
100 | ||
101 | static void ceu_write(struct sh_mobile_ceu_dev *priv, | |
102 | unsigned long reg_offs, unsigned long data) | |
103 | { | |
104 | iowrite32(data, priv->base + reg_offs); | |
105 | } | |
106 | ||
107 | static unsigned long ceu_read(struct sh_mobile_ceu_dev *priv, | |
108 | unsigned long reg_offs) | |
109 | { | |
110 | return ioread32(priv->base + reg_offs); | |
111 | } | |
112 | ||
113 | /* | |
114 | * Videobuf operations | |
115 | */ | |
116 | static int sh_mobile_ceu_videobuf_setup(struct videobuf_queue *vq, | |
117 | unsigned int *count, | |
118 | unsigned int *size) | |
119 | { | |
120 | struct soc_camera_device *icd = vq->priv_data; | |
121 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
122 | struct sh_mobile_ceu_dev *pcdev = ici->priv; | |
123 | int bytes_per_pixel = (icd->current_fmt->depth + 7) >> 3; | |
124 | ||
125 | *size = PAGE_ALIGN(icd->width * icd->height * bytes_per_pixel); | |
126 | ||
127 | if (0 == *count) | |
128 | *count = 2; | |
129 | ||
130 | if (pcdev->video_limit) { | |
131 | while (*size * *count > pcdev->video_limit) | |
132 | (*count)--; | |
133 | } | |
134 | ||
135 | dev_dbg(&icd->dev, "count=%d, size=%d\n", *count, *size); | |
136 | ||
137 | return 0; | |
138 | } | |
139 | ||
140 | static void free_buffer(struct videobuf_queue *vq, | |
141 | struct sh_mobile_ceu_buffer *buf) | |
142 | { | |
143 | struct soc_camera_device *icd = vq->priv_data; | |
144 | ||
86751b01 | 145 | dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__, |
0d3244d6 MD |
146 | &buf->vb, buf->vb.baddr, buf->vb.bsize); |
147 | ||
148 | if (in_interrupt()) | |
149 | BUG(); | |
150 | ||
151 | videobuf_dma_contig_free(vq, &buf->vb); | |
152 | dev_dbg(&icd->dev, "%s freed\n", __func__); | |
153 | buf->vb.state = VIDEOBUF_NEEDS_INIT; | |
154 | } | |
155 | ||
156 | static void sh_mobile_ceu_capture(struct sh_mobile_ceu_dev *pcdev) | |
157 | { | |
158 | ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) & ~1); | |
159 | ceu_write(pcdev, CETCR, ~ceu_read(pcdev, CETCR) & 0x0317f313); | |
160 | ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) | 1); | |
161 | ||
162 | ceu_write(pcdev, CAPCR, ceu_read(pcdev, CAPCR) & ~0x10000); | |
163 | ||
164 | ceu_write(pcdev, CETCR, 0x0317f313 ^ 0x10); | |
165 | ||
166 | if (pcdev->active) { | |
51354cc3 | 167 | pcdev->active->state = VIDEOBUF_ACTIVE; |
0d3244d6 MD |
168 | ceu_write(pcdev, CDAYR, videobuf_to_dma_contig(pcdev->active)); |
169 | ceu_write(pcdev, CAPSR, 0x1); /* start capture */ | |
170 | } | |
171 | } | |
172 | ||
173 | static int sh_mobile_ceu_videobuf_prepare(struct videobuf_queue *vq, | |
174 | struct videobuf_buffer *vb, | |
175 | enum v4l2_field field) | |
176 | { | |
177 | struct soc_camera_device *icd = vq->priv_data; | |
178 | struct sh_mobile_ceu_buffer *buf; | |
179 | int ret; | |
180 | ||
181 | buf = container_of(vb, struct sh_mobile_ceu_buffer, vb); | |
182 | ||
86751b01 | 183 | dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__, |
0d3244d6 MD |
184 | vb, vb->baddr, vb->bsize); |
185 | ||
186 | /* Added list head initialization on alloc */ | |
187 | WARN_ON(!list_empty(&vb->queue)); | |
188 | ||
189 | #ifdef DEBUG | |
190 | /* This can be useful if you want to see if we actually fill | |
191 | * the buffer with something */ | |
192 | memset((void *)vb->baddr, 0xaa, vb->bsize); | |
193 | #endif | |
194 | ||
195 | BUG_ON(NULL == icd->current_fmt); | |
196 | ||
197 | if (buf->fmt != icd->current_fmt || | |
198 | vb->width != icd->width || | |
199 | vb->height != icd->height || | |
200 | vb->field != field) { | |
201 | buf->fmt = icd->current_fmt; | |
202 | vb->width = icd->width; | |
203 | vb->height = icd->height; | |
204 | vb->field = field; | |
205 | vb->state = VIDEOBUF_NEEDS_INIT; | |
206 | } | |
207 | ||
208 | vb->size = vb->width * vb->height * ((buf->fmt->depth + 7) >> 3); | |
209 | if (0 != vb->baddr && vb->bsize < vb->size) { | |
210 | ret = -EINVAL; | |
211 | goto out; | |
212 | } | |
213 | ||
214 | if (vb->state == VIDEOBUF_NEEDS_INIT) { | |
215 | ret = videobuf_iolock(vq, vb, NULL); | |
216 | if (ret) | |
217 | goto fail; | |
218 | vb->state = VIDEOBUF_PREPARED; | |
219 | } | |
220 | ||
221 | return 0; | |
222 | fail: | |
223 | free_buffer(vq, buf); | |
224 | out: | |
225 | return ret; | |
226 | } | |
227 | ||
228 | static void sh_mobile_ceu_videobuf_queue(struct videobuf_queue *vq, | |
229 | struct videobuf_buffer *vb) | |
230 | { | |
231 | struct soc_camera_device *icd = vq->priv_data; | |
232 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
233 | struct sh_mobile_ceu_dev *pcdev = ici->priv; | |
234 | unsigned long flags; | |
235 | ||
86751b01 | 236 | dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__, |
0d3244d6 MD |
237 | vb, vb->baddr, vb->bsize); |
238 | ||
51354cc3 | 239 | vb->state = VIDEOBUF_QUEUED; |
0d3244d6 MD |
240 | spin_lock_irqsave(&pcdev->lock, flags); |
241 | list_add_tail(&vb->queue, &pcdev->capture); | |
242 | ||
243 | if (!pcdev->active) { | |
244 | pcdev->active = vb; | |
245 | sh_mobile_ceu_capture(pcdev); | |
246 | } | |
247 | ||
248 | spin_unlock_irqrestore(&pcdev->lock, flags); | |
249 | } | |
250 | ||
251 | static void sh_mobile_ceu_videobuf_release(struct videobuf_queue *vq, | |
252 | struct videobuf_buffer *vb) | |
253 | { | |
254 | free_buffer(vq, container_of(vb, struct sh_mobile_ceu_buffer, vb)); | |
255 | } | |
256 | ||
257 | static struct videobuf_queue_ops sh_mobile_ceu_videobuf_ops = { | |
258 | .buf_setup = sh_mobile_ceu_videobuf_setup, | |
259 | .buf_prepare = sh_mobile_ceu_videobuf_prepare, | |
260 | .buf_queue = sh_mobile_ceu_videobuf_queue, | |
261 | .buf_release = sh_mobile_ceu_videobuf_release, | |
262 | }; | |
263 | ||
264 | static irqreturn_t sh_mobile_ceu_irq(int irq, void *data) | |
265 | { | |
266 | struct sh_mobile_ceu_dev *pcdev = data; | |
267 | struct videobuf_buffer *vb; | |
268 | unsigned long flags; | |
269 | ||
270 | spin_lock_irqsave(&pcdev->lock, flags); | |
271 | ||
272 | vb = pcdev->active; | |
273 | list_del_init(&vb->queue); | |
274 | ||
275 | if (!list_empty(&pcdev->capture)) | |
276 | pcdev->active = list_entry(pcdev->capture.next, | |
277 | struct videobuf_buffer, queue); | |
278 | else | |
279 | pcdev->active = NULL; | |
280 | ||
281 | sh_mobile_ceu_capture(pcdev); | |
282 | ||
283 | vb->state = VIDEOBUF_DONE; | |
284 | do_gettimeofday(&vb->ts); | |
285 | vb->field_count++; | |
286 | wake_up(&vb->done); | |
287 | spin_unlock_irqrestore(&pcdev->lock, flags); | |
288 | ||
289 | return IRQ_HANDLED; | |
290 | } | |
291 | ||
1c3bb743 | 292 | /* Called with .video_lock held */ |
0d3244d6 MD |
293 | static int sh_mobile_ceu_add_device(struct soc_camera_device *icd) |
294 | { | |
295 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
296 | struct sh_mobile_ceu_dev *pcdev = ici->priv; | |
297 | int ret = -EBUSY; | |
298 | ||
0d3244d6 MD |
299 | if (pcdev->icd) |
300 | goto err; | |
301 | ||
302 | dev_info(&icd->dev, | |
303 | "SuperH Mobile CEU driver attached to camera %d\n", | |
304 | icd->devnum); | |
305 | ||
0d3244d6 MD |
306 | ret = icd->ops->init(icd); |
307 | if (ret) | |
308 | goto err; | |
309 | ||
a42b6dd6 MD |
310 | clk_enable(pcdev->clk); |
311 | ||
0d3244d6 MD |
312 | ceu_write(pcdev, CAPSR, 1 << 16); /* reset */ |
313 | while (ceu_read(pcdev, CSTSR) & 1) | |
314 | msleep(1); | |
315 | ||
316 | pcdev->icd = icd; | |
317 | err: | |
0d3244d6 MD |
318 | return ret; |
319 | } | |
320 | ||
1c3bb743 | 321 | /* Called with .video_lock held */ |
0d3244d6 MD |
322 | static void sh_mobile_ceu_remove_device(struct soc_camera_device *icd) |
323 | { | |
324 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
325 | struct sh_mobile_ceu_dev *pcdev = ici->priv; | |
51354cc3 | 326 | unsigned long flags; |
0d3244d6 MD |
327 | |
328 | BUG_ON(icd != pcdev->icd); | |
329 | ||
330 | /* disable capture, disable interrupts */ | |
331 | ceu_write(pcdev, CEIER, 0); | |
332 | ceu_write(pcdev, CAPSR, 1 << 16); /* reset */ | |
51354cc3 MD |
333 | |
334 | /* make sure active buffer is canceled */ | |
335 | spin_lock_irqsave(&pcdev->lock, flags); | |
336 | if (pcdev->active) { | |
337 | list_del(&pcdev->active->queue); | |
338 | pcdev->active->state = VIDEOBUF_ERROR; | |
339 | wake_up_all(&pcdev->active->done); | |
340 | pcdev->active = NULL; | |
341 | } | |
342 | spin_unlock_irqrestore(&pcdev->lock, flags); | |
343 | ||
a42b6dd6 MD |
344 | clk_disable(pcdev->clk); |
345 | ||
0d3244d6 | 346 | icd->ops->release(icd); |
0d3244d6 MD |
347 | |
348 | dev_info(&icd->dev, | |
349 | "SuperH Mobile CEU driver detached from camera %d\n", | |
350 | icd->devnum); | |
351 | ||
352 | pcdev->icd = NULL; | |
353 | } | |
354 | ||
355 | static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd, | |
356 | __u32 pixfmt) | |
357 | { | |
358 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
359 | struct sh_mobile_ceu_dev *pcdev = ici->priv; | |
360 | int ret, buswidth, width, cfszr_width, cdwdr_width; | |
361 | unsigned long camera_flags, common_flags, value; | |
362 | ||
363 | camera_flags = icd->ops->query_bus_param(icd); | |
364 | common_flags = soc_camera_bus_param_compatible(camera_flags, | |
365 | pcdev->pdata->flags); | |
366 | if (!common_flags) | |
367 | return -EINVAL; | |
368 | ||
369 | ret = icd->ops->set_bus_param(icd, common_flags); | |
370 | if (ret < 0) | |
371 | return ret; | |
372 | ||
373 | switch (common_flags & SOCAM_DATAWIDTH_MASK) { | |
374 | case SOCAM_DATAWIDTH_8: | |
375 | buswidth = 8; | |
376 | break; | |
377 | case SOCAM_DATAWIDTH_16: | |
378 | buswidth = 16; | |
379 | break; | |
380 | default: | |
381 | return -EINVAL; | |
382 | } | |
383 | ||
384 | ceu_write(pcdev, CRCNTR, 0); | |
385 | ceu_write(pcdev, CRCMPR, 0); | |
386 | ||
387 | value = 0x00000010; | |
388 | value |= (common_flags & SOCAM_VSYNC_ACTIVE_LOW) ? (1 << 1) : 0; | |
389 | value |= (common_flags & SOCAM_HSYNC_ACTIVE_LOW) ? (1 << 0) : 0; | |
390 | value |= (buswidth == 16) ? (1 << 12) : 0; | |
391 | ceu_write(pcdev, CAMCR, value); | |
392 | ||
393 | ceu_write(pcdev, CAPCR, 0x00300000); | |
394 | ceu_write(pcdev, CAIFR, 0); | |
395 | ||
396 | mdelay(1); | |
397 | ||
398 | width = icd->width * (icd->current_fmt->depth / 8); | |
399 | width = (buswidth == 16) ? width / 2 : width; | |
400 | cfszr_width = (buswidth == 8) ? width / 2 : width; | |
401 | cdwdr_width = (buswidth == 16) ? width * 2 : width; | |
402 | ||
403 | ceu_write(pcdev, CAMOR, 0); | |
404 | ceu_write(pcdev, CAPWR, (icd->height << 16) | width); | |
405 | ceu_write(pcdev, CFLCR, 0); /* data fetch mode - no scaling */ | |
406 | ceu_write(pcdev, CFSZR, (icd->height << 16) | cfszr_width); | |
407 | ceu_write(pcdev, CLFCR, 0); /* data fetch mode - no lowpass filter */ | |
dd54203b MD |
408 | |
409 | /* A few words about byte order (observed in Big Endian mode) | |
410 | * | |
411 | * In data fetch mode bytes are received in chunks of 8 bytes. | |
412 | * D0, D1, D2, D3, D4, D5, D6, D7 (D0 received first) | |
413 | * | |
414 | * The data is however by default written to memory in reverse order: | |
415 | * D7, D6, D5, D4, D3, D2, D1, D0 (D7 written to lowest byte) | |
416 | * | |
417 | * The lowest three bits of CDOCR allows us to do swapping, | |
2c0a072e MD |
418 | * using 7 we swap the data bytes to match the incoming order: |
419 | * D0, D1, D2, D3, D4, D5, D6, D7 | |
dd54203b | 420 | */ |
2c0a072e | 421 | ceu_write(pcdev, CDOCR, 0x00000017); |
0d3244d6 MD |
422 | |
423 | ceu_write(pcdev, CDWDR, cdwdr_width); | |
424 | ceu_write(pcdev, CFWCR, 0); /* keep "datafetch firewall" disabled */ | |
425 | ||
426 | /* not in bundle mode: skip CBDSR, CDAYR2, CDACR2, CDBYR2, CDBCR2 */ | |
427 | /* in data fetch mode: no need for CDACR, CDBYR, CDBCR */ | |
428 | ||
429 | return 0; | |
430 | } | |
431 | ||
9414de39 | 432 | static int sh_mobile_ceu_try_bus_param(struct soc_camera_device *icd) |
0d3244d6 MD |
433 | { |
434 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
435 | struct sh_mobile_ceu_dev *pcdev = ici->priv; | |
436 | unsigned long camera_flags, common_flags; | |
437 | ||
438 | camera_flags = icd->ops->query_bus_param(icd); | |
439 | common_flags = soc_camera_bus_param_compatible(camera_flags, | |
440 | pcdev->pdata->flags); | |
441 | if (!common_flags) | |
442 | return -EINVAL; | |
443 | ||
444 | return 0; | |
445 | } | |
446 | ||
9414de39 MD |
447 | static int sh_mobile_ceu_get_formats(struct soc_camera_device *icd, int idx, |
448 | struct soc_camera_format_xlate *xlate) | |
449 | { | |
450 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
451 | int ret; | |
452 | int formats = 0; | |
453 | ||
454 | ret = sh_mobile_ceu_try_bus_param(icd); | |
455 | if (ret < 0) | |
456 | return 0; | |
457 | ||
458 | switch (icd->formats[idx].fourcc) { | |
459 | default: | |
460 | /* Generic pass-through */ | |
461 | formats++; | |
462 | if (xlate) { | |
463 | xlate->host_fmt = icd->formats + idx; | |
464 | xlate->cam_fmt = icd->formats + idx; | |
465 | xlate->buswidth = icd->formats[idx].depth; | |
466 | xlate++; | |
467 | dev_dbg(&ici->dev, | |
468 | "Providing format %s in pass-through mode\n", | |
469 | icd->formats[idx].name); | |
470 | } | |
471 | } | |
472 | ||
473 | return formats; | |
474 | } | |
475 | ||
d8fac217 GL |
476 | static int sh_mobile_ceu_set_fmt(struct soc_camera_device *icd, |
477 | __u32 pixfmt, struct v4l2_rect *rect) | |
0d3244d6 | 478 | { |
9414de39 MD |
479 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
480 | const struct soc_camera_format_xlate *xlate; | |
25c4d74e GL |
481 | int ret; |
482 | ||
9414de39 MD |
483 | xlate = soc_camera_xlate_by_fourcc(icd, pixfmt); |
484 | if (!xlate) { | |
485 | dev_warn(&ici->dev, "Format %x not found\n", pixfmt); | |
486 | return -EINVAL; | |
25c4d74e GL |
487 | } |
488 | ||
9414de39 MD |
489 | switch (pixfmt) { |
490 | case 0: /* Only geometry change */ | |
491 | ret = icd->ops->set_fmt(icd, pixfmt, rect); | |
492 | break; | |
493 | default: | |
494 | ret = icd->ops->set_fmt(icd, xlate->cam_fmt->fourcc, rect); | |
495 | } | |
496 | ||
497 | if (pixfmt && !ret) { | |
498 | icd->buswidth = xlate->buswidth; | |
499 | icd->current_fmt = xlate->host_fmt; | |
500 | } | |
25c4d74e GL |
501 | |
502 | return ret; | |
0d3244d6 MD |
503 | } |
504 | ||
d8fac217 GL |
505 | static int sh_mobile_ceu_try_fmt(struct soc_camera_device *icd, |
506 | struct v4l2_format *f) | |
0d3244d6 | 507 | { |
9414de39 MD |
508 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
509 | const struct soc_camera_format_xlate *xlate; | |
510 | __u32 pixfmt = f->fmt.pix.pixelformat; | |
a2c8c68c | 511 | |
9414de39 MD |
512 | xlate = soc_camera_xlate_by_fourcc(icd, pixfmt); |
513 | if (!xlate) { | |
514 | dev_warn(&ici->dev, "Format %x not found\n", pixfmt); | |
25c4d74e | 515 | return -EINVAL; |
9414de39 | 516 | } |
25c4d74e | 517 | |
0d3244d6 MD |
518 | /* FIXME: calculate using depth and bus width */ |
519 | ||
520 | if (f->fmt.pix.height < 4) | |
521 | f->fmt.pix.height = 4; | |
522 | if (f->fmt.pix.height > 1920) | |
523 | f->fmt.pix.height = 1920; | |
524 | if (f->fmt.pix.width < 2) | |
525 | f->fmt.pix.width = 2; | |
526 | if (f->fmt.pix.width > 2560) | |
527 | f->fmt.pix.width = 2560; | |
528 | f->fmt.pix.width &= ~0x01; | |
529 | f->fmt.pix.height &= ~0x03; | |
530 | ||
25c4d74e | 531 | f->fmt.pix.bytesperline = f->fmt.pix.width * |
9414de39 | 532 | DIV_ROUND_UP(xlate->host_fmt->depth, 8); |
25c4d74e GL |
533 | f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline; |
534 | ||
0d3244d6 | 535 | /* limit to sensor capabilities */ |
d8fac217 | 536 | return icd->ops->try_fmt(icd, f); |
0d3244d6 MD |
537 | } |
538 | ||
539 | static int sh_mobile_ceu_reqbufs(struct soc_camera_file *icf, | |
540 | struct v4l2_requestbuffers *p) | |
541 | { | |
542 | int i; | |
543 | ||
544 | /* This is for locking debugging only. I removed spinlocks and now I | |
545 | * check whether .prepare is ever called on a linked buffer, or whether | |
546 | * a dma IRQ can occur for an in-work or unlinked buffer. Until now | |
547 | * it hadn't triggered */ | |
548 | for (i = 0; i < p->count; i++) { | |
549 | struct sh_mobile_ceu_buffer *buf; | |
550 | ||
551 | buf = container_of(icf->vb_vidq.bufs[i], | |
552 | struct sh_mobile_ceu_buffer, vb); | |
553 | INIT_LIST_HEAD(&buf->vb.queue); | |
554 | } | |
555 | ||
556 | return 0; | |
557 | } | |
558 | ||
559 | static unsigned int sh_mobile_ceu_poll(struct file *file, poll_table *pt) | |
560 | { | |
561 | struct soc_camera_file *icf = file->private_data; | |
562 | struct sh_mobile_ceu_buffer *buf; | |
563 | ||
564 | buf = list_entry(icf->vb_vidq.stream.next, | |
565 | struct sh_mobile_ceu_buffer, vb.stream); | |
566 | ||
567 | poll_wait(file, &buf->vb.done, pt); | |
568 | ||
569 | if (buf->vb.state == VIDEOBUF_DONE || | |
570 | buf->vb.state == VIDEOBUF_ERROR) | |
571 | return POLLIN|POLLRDNORM; | |
572 | ||
573 | return 0; | |
574 | } | |
575 | ||
576 | static int sh_mobile_ceu_querycap(struct soc_camera_host *ici, | |
577 | struct v4l2_capability *cap) | |
578 | { | |
579 | strlcpy(cap->card, "SuperH_Mobile_CEU", sizeof(cap->card)); | |
580 | cap->version = KERNEL_VERSION(0, 0, 5); | |
581 | cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; | |
582 | return 0; | |
583 | } | |
584 | ||
585 | static void sh_mobile_ceu_init_videobuf(struct videobuf_queue *q, | |
586 | struct soc_camera_device *icd) | |
587 | { | |
588 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
589 | struct sh_mobile_ceu_dev *pcdev = ici->priv; | |
590 | ||
591 | videobuf_queue_dma_contig_init(q, | |
592 | &sh_mobile_ceu_videobuf_ops, | |
593 | &ici->dev, &pcdev->lock, | |
594 | V4L2_BUF_TYPE_VIDEO_CAPTURE, | |
595 | V4L2_FIELD_NONE, | |
596 | sizeof(struct sh_mobile_ceu_buffer), | |
597 | icd); | |
598 | } | |
599 | ||
600 | static struct soc_camera_host_ops sh_mobile_ceu_host_ops = { | |
601 | .owner = THIS_MODULE, | |
602 | .add = sh_mobile_ceu_add_device, | |
603 | .remove = sh_mobile_ceu_remove_device, | |
9414de39 | 604 | .get_formats = sh_mobile_ceu_get_formats, |
d8fac217 GL |
605 | .set_fmt = sh_mobile_ceu_set_fmt, |
606 | .try_fmt = sh_mobile_ceu_try_fmt, | |
0d3244d6 MD |
607 | .reqbufs = sh_mobile_ceu_reqbufs, |
608 | .poll = sh_mobile_ceu_poll, | |
609 | .querycap = sh_mobile_ceu_querycap, | |
0d3244d6 MD |
610 | .set_bus_param = sh_mobile_ceu_set_bus_param, |
611 | .init_videobuf = sh_mobile_ceu_init_videobuf, | |
612 | }; | |
613 | ||
614 | static int sh_mobile_ceu_probe(struct platform_device *pdev) | |
615 | { | |
616 | struct sh_mobile_ceu_dev *pcdev; | |
617 | struct resource *res; | |
618 | void __iomem *base; | |
a42b6dd6 | 619 | char clk_name[8]; |
0d3244d6 MD |
620 | unsigned int irq; |
621 | int err = 0; | |
622 | ||
623 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
624 | irq = platform_get_irq(pdev, 0); | |
625 | if (!res || !irq) { | |
626 | dev_err(&pdev->dev, "Not enough CEU platform resources.\n"); | |
627 | err = -ENODEV; | |
628 | goto exit; | |
629 | } | |
630 | ||
631 | pcdev = kzalloc(sizeof(*pcdev), GFP_KERNEL); | |
632 | if (!pcdev) { | |
633 | dev_err(&pdev->dev, "Could not allocate pcdev\n"); | |
634 | err = -ENOMEM; | |
635 | goto exit; | |
636 | } | |
637 | ||
638 | platform_set_drvdata(pdev, pcdev); | |
639 | INIT_LIST_HEAD(&pcdev->capture); | |
640 | spin_lock_init(&pcdev->lock); | |
641 | ||
642 | pcdev->pdata = pdev->dev.platform_data; | |
643 | if (!pcdev->pdata) { | |
644 | err = -EINVAL; | |
645 | dev_err(&pdev->dev, "CEU platform data not set.\n"); | |
646 | goto exit_kfree; | |
647 | } | |
648 | ||
649 | base = ioremap_nocache(res->start, res->end - res->start + 1); | |
650 | if (!base) { | |
651 | err = -ENXIO; | |
652 | dev_err(&pdev->dev, "Unable to ioremap CEU registers.\n"); | |
653 | goto exit_kfree; | |
654 | } | |
655 | ||
656 | pcdev->irq = irq; | |
657 | pcdev->base = base; | |
658 | pcdev->video_limit = 0; /* only enabled if second resource exists */ | |
659 | pcdev->dev = &pdev->dev; | |
660 | ||
661 | res = platform_get_resource(pdev, IORESOURCE_MEM, 1); | |
662 | if (res) { | |
663 | err = dma_declare_coherent_memory(&pdev->dev, res->start, | |
664 | res->start, | |
665 | (res->end - res->start) + 1, | |
666 | DMA_MEMORY_MAP | | |
667 | DMA_MEMORY_EXCLUSIVE); | |
668 | if (!err) { | |
669 | dev_err(&pdev->dev, "Unable to declare CEU memory.\n"); | |
670 | err = -ENXIO; | |
671 | goto exit_iounmap; | |
672 | } | |
673 | ||
674 | pcdev->video_limit = (res->end - res->start) + 1; | |
675 | } | |
676 | ||
677 | /* request irq */ | |
678 | err = request_irq(pcdev->irq, sh_mobile_ceu_irq, IRQF_DISABLED, | |
af128a10 | 679 | dev_name(&pdev->dev), pcdev); |
0d3244d6 MD |
680 | if (err) { |
681 | dev_err(&pdev->dev, "Unable to register CEU interrupt.\n"); | |
682 | goto exit_release_mem; | |
683 | } | |
684 | ||
a42b6dd6 MD |
685 | snprintf(clk_name, sizeof(clk_name), "ceu%d", pdev->id); |
686 | pcdev->clk = clk_get(&pdev->dev, clk_name); | |
687 | if (IS_ERR(pcdev->clk)) { | |
688 | dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name); | |
689 | err = PTR_ERR(pcdev->clk); | |
690 | goto exit_free_irq; | |
691 | } | |
692 | ||
0d3244d6 MD |
693 | pcdev->ici.priv = pcdev; |
694 | pcdev->ici.dev.parent = &pdev->dev; | |
695 | pcdev->ici.nr = pdev->id; | |
af128a10 KS |
696 | pcdev->ici.drv_name = dev_name(&pdev->dev); |
697 | pcdev->ici.ops = &sh_mobile_ceu_host_ops; | |
0d3244d6 MD |
698 | |
699 | err = soc_camera_host_register(&pcdev->ici); | |
700 | if (err) | |
a42b6dd6 | 701 | goto exit_free_clk; |
0d3244d6 MD |
702 | |
703 | return 0; | |
704 | ||
a42b6dd6 MD |
705 | exit_free_clk: |
706 | clk_put(pcdev->clk); | |
0d3244d6 MD |
707 | exit_free_irq: |
708 | free_irq(pcdev->irq, pcdev); | |
709 | exit_release_mem: | |
710 | if (platform_get_resource(pdev, IORESOURCE_MEM, 1)) | |
711 | dma_release_declared_memory(&pdev->dev); | |
712 | exit_iounmap: | |
713 | iounmap(base); | |
714 | exit_kfree: | |
715 | kfree(pcdev); | |
716 | exit: | |
717 | return err; | |
718 | } | |
719 | ||
720 | static int sh_mobile_ceu_remove(struct platform_device *pdev) | |
721 | { | |
722 | struct sh_mobile_ceu_dev *pcdev = platform_get_drvdata(pdev); | |
723 | ||
724 | soc_camera_host_unregister(&pcdev->ici); | |
a42b6dd6 | 725 | clk_put(pcdev->clk); |
0d3244d6 MD |
726 | free_irq(pcdev->irq, pcdev); |
727 | if (platform_get_resource(pdev, IORESOURCE_MEM, 1)) | |
728 | dma_release_declared_memory(&pdev->dev); | |
729 | iounmap(pcdev->base); | |
730 | kfree(pcdev); | |
731 | return 0; | |
732 | } | |
733 | ||
734 | static struct platform_driver sh_mobile_ceu_driver = { | |
735 | .driver = { | |
736 | .name = "sh_mobile_ceu", | |
737 | }, | |
738 | .probe = sh_mobile_ceu_probe, | |
739 | .remove = sh_mobile_ceu_remove, | |
740 | }; | |
741 | ||
742 | static int __init sh_mobile_ceu_init(void) | |
743 | { | |
744 | return platform_driver_register(&sh_mobile_ceu_driver); | |
745 | } | |
746 | ||
747 | static void __exit sh_mobile_ceu_exit(void) | |
748 | { | |
01c1e4ca | 749 | platform_driver_unregister(&sh_mobile_ceu_driver); |
0d3244d6 MD |
750 | } |
751 | ||
752 | module_init(sh_mobile_ceu_init); | |
753 | module_exit(sh_mobile_ceu_exit); | |
754 | ||
755 | MODULE_DESCRIPTION("SuperH Mobile CEU driver"); | |
756 | MODULE_AUTHOR("Magnus Damm"); | |
757 | MODULE_LICENSE("GPL"); |