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> | |
32 | #include <linux/mutex.h> | |
33 | #include <linux/videodev2.h> | |
a42b6dd6 | 34 | #include <linux/clk.h> |
0d3244d6 MD |
35 | |
36 | #include <media/v4l2-common.h> | |
37 | #include <media/v4l2-dev.h> | |
38 | #include <media/soc_camera.h> | |
39 | #include <media/sh_mobile_ceu.h> | |
40 | #include <media/videobuf-dma-contig.h> | |
41 | ||
42 | /* register offsets for sh7722 / sh7723 */ | |
43 | ||
dd54203b MD |
44 | #define CAPSR 0x00 /* Capture start register */ |
45 | #define CAPCR 0x04 /* Capture control register */ | |
46 | #define CAMCR 0x08 /* Capture interface control register */ | |
47 | #define CMCYR 0x0c /* Capture interface cycle register */ | |
48 | #define CAMOR 0x10 /* Capture interface offset register */ | |
49 | #define CAPWR 0x14 /* Capture interface width register */ | |
50 | #define CAIFR 0x18 /* Capture interface input format register */ | |
51 | #define CSTCR 0x20 /* Camera strobe control register (<= sh7722) */ | |
52 | #define CSECR 0x24 /* Camera strobe emission count register (<= sh7722) */ | |
53 | #define CRCNTR 0x28 /* CEU register control register */ | |
54 | #define CRCMPR 0x2c /* CEU register forcible control register */ | |
55 | #define CFLCR 0x30 /* Capture filter control register */ | |
56 | #define CFSZR 0x34 /* Capture filter size clip register */ | |
57 | #define CDWDR 0x38 /* Capture destination width register */ | |
58 | #define CDAYR 0x3c /* Capture data address Y register */ | |
59 | #define CDACR 0x40 /* Capture data address C register */ | |
60 | #define CDBYR 0x44 /* Capture data bottom-field address Y register */ | |
61 | #define CDBCR 0x48 /* Capture data bottom-field address C register */ | |
62 | #define CBDSR 0x4c /* Capture bundle destination size register */ | |
63 | #define CFWCR 0x5c /* Firewall operation control register */ | |
64 | #define CLFCR 0x60 /* Capture low-pass filter control register */ | |
65 | #define CDOCR 0x64 /* Capture data output control register */ | |
66 | #define CDDCR 0x68 /* Capture data complexity level register */ | |
67 | #define CDDAR 0x6c /* Capture data complexity level address register */ | |
68 | #define CEIER 0x70 /* Capture event interrupt enable register */ | |
69 | #define CETCR 0x74 /* Capture event flag clear register */ | |
70 | #define CSTSR 0x7c /* Capture status register */ | |
71 | #define CSRTR 0x80 /* Capture software reset register */ | |
72 | #define CDSSR 0x84 /* Capture data size register */ | |
73 | #define CDAYR2 0x90 /* Capture data address Y register 2 */ | |
74 | #define CDACR2 0x94 /* Capture data address C register 2 */ | |
75 | #define CDBYR2 0x98 /* Capture data bottom-field address Y register 2 */ | |
76 | #define CDBCR2 0x9c /* Capture data bottom-field address C register 2 */ | |
0d3244d6 MD |
77 | |
78 | static DEFINE_MUTEX(camera_lock); | |
79 | ||
80 | /* per video frame buffer */ | |
81 | struct sh_mobile_ceu_buffer { | |
82 | struct videobuf_buffer vb; /* v4l buffer must be first */ | |
83 | const struct soc_camera_data_format *fmt; | |
84 | }; | |
85 | ||
86 | struct sh_mobile_ceu_dev { | |
87 | struct device *dev; | |
88 | struct soc_camera_host ici; | |
89 | struct soc_camera_device *icd; | |
90 | ||
91 | unsigned int irq; | |
92 | void __iomem *base; | |
a42b6dd6 | 93 | struct clk *clk; |
0d3244d6 MD |
94 | unsigned long video_limit; |
95 | ||
c60f2b5c | 96 | /* lock used to protect videobuf */ |
0d3244d6 MD |
97 | spinlock_t lock; |
98 | struct list_head capture; | |
99 | struct videobuf_buffer *active; | |
100 | ||
101 | struct sh_mobile_ceu_info *pdata; | |
102 | }; | |
103 | ||
104 | static void ceu_write(struct sh_mobile_ceu_dev *priv, | |
105 | unsigned long reg_offs, unsigned long data) | |
106 | { | |
107 | iowrite32(data, priv->base + reg_offs); | |
108 | } | |
109 | ||
110 | static unsigned long ceu_read(struct sh_mobile_ceu_dev *priv, | |
111 | unsigned long reg_offs) | |
112 | { | |
113 | return ioread32(priv->base + reg_offs); | |
114 | } | |
115 | ||
116 | /* | |
117 | * Videobuf operations | |
118 | */ | |
119 | static int sh_mobile_ceu_videobuf_setup(struct videobuf_queue *vq, | |
120 | unsigned int *count, | |
121 | unsigned int *size) | |
122 | { | |
123 | struct soc_camera_device *icd = vq->priv_data; | |
124 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
125 | struct sh_mobile_ceu_dev *pcdev = ici->priv; | |
126 | int bytes_per_pixel = (icd->current_fmt->depth + 7) >> 3; | |
127 | ||
128 | *size = PAGE_ALIGN(icd->width * icd->height * bytes_per_pixel); | |
129 | ||
130 | if (0 == *count) | |
131 | *count = 2; | |
132 | ||
133 | if (pcdev->video_limit) { | |
134 | while (*size * *count > pcdev->video_limit) | |
135 | (*count)--; | |
136 | } | |
137 | ||
138 | dev_dbg(&icd->dev, "count=%d, size=%d\n", *count, *size); | |
139 | ||
140 | return 0; | |
141 | } | |
142 | ||
143 | static void free_buffer(struct videobuf_queue *vq, | |
144 | struct sh_mobile_ceu_buffer *buf) | |
145 | { | |
146 | struct soc_camera_device *icd = vq->priv_data; | |
147 | ||
86751b01 | 148 | dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__, |
0d3244d6 MD |
149 | &buf->vb, buf->vb.baddr, buf->vb.bsize); |
150 | ||
151 | if (in_interrupt()) | |
152 | BUG(); | |
153 | ||
154 | videobuf_dma_contig_free(vq, &buf->vb); | |
155 | dev_dbg(&icd->dev, "%s freed\n", __func__); | |
156 | buf->vb.state = VIDEOBUF_NEEDS_INIT; | |
157 | } | |
158 | ||
159 | static void sh_mobile_ceu_capture(struct sh_mobile_ceu_dev *pcdev) | |
160 | { | |
161 | ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) & ~1); | |
162 | ceu_write(pcdev, CETCR, ~ceu_read(pcdev, CETCR) & 0x0317f313); | |
163 | ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) | 1); | |
164 | ||
165 | ceu_write(pcdev, CAPCR, ceu_read(pcdev, CAPCR) & ~0x10000); | |
166 | ||
167 | ceu_write(pcdev, CETCR, 0x0317f313 ^ 0x10); | |
168 | ||
169 | if (pcdev->active) { | |
51354cc3 | 170 | pcdev->active->state = VIDEOBUF_ACTIVE; |
0d3244d6 MD |
171 | ceu_write(pcdev, CDAYR, videobuf_to_dma_contig(pcdev->active)); |
172 | ceu_write(pcdev, CAPSR, 0x1); /* start capture */ | |
173 | } | |
174 | } | |
175 | ||
176 | static int sh_mobile_ceu_videobuf_prepare(struct videobuf_queue *vq, | |
177 | struct videobuf_buffer *vb, | |
178 | enum v4l2_field field) | |
179 | { | |
180 | struct soc_camera_device *icd = vq->priv_data; | |
181 | struct sh_mobile_ceu_buffer *buf; | |
182 | int ret; | |
183 | ||
184 | buf = container_of(vb, struct sh_mobile_ceu_buffer, vb); | |
185 | ||
86751b01 | 186 | dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__, |
0d3244d6 MD |
187 | vb, vb->baddr, vb->bsize); |
188 | ||
189 | /* Added list head initialization on alloc */ | |
190 | WARN_ON(!list_empty(&vb->queue)); | |
191 | ||
192 | #ifdef DEBUG | |
193 | /* This can be useful if you want to see if we actually fill | |
194 | * the buffer with something */ | |
195 | memset((void *)vb->baddr, 0xaa, vb->bsize); | |
196 | #endif | |
197 | ||
198 | BUG_ON(NULL == icd->current_fmt); | |
199 | ||
200 | if (buf->fmt != icd->current_fmt || | |
201 | vb->width != icd->width || | |
202 | vb->height != icd->height || | |
203 | vb->field != field) { | |
204 | buf->fmt = icd->current_fmt; | |
205 | vb->width = icd->width; | |
206 | vb->height = icd->height; | |
207 | vb->field = field; | |
208 | vb->state = VIDEOBUF_NEEDS_INIT; | |
209 | } | |
210 | ||
211 | vb->size = vb->width * vb->height * ((buf->fmt->depth + 7) >> 3); | |
212 | if (0 != vb->baddr && vb->bsize < vb->size) { | |
213 | ret = -EINVAL; | |
214 | goto out; | |
215 | } | |
216 | ||
217 | if (vb->state == VIDEOBUF_NEEDS_INIT) { | |
218 | ret = videobuf_iolock(vq, vb, NULL); | |
219 | if (ret) | |
220 | goto fail; | |
221 | vb->state = VIDEOBUF_PREPARED; | |
222 | } | |
223 | ||
224 | return 0; | |
225 | fail: | |
226 | free_buffer(vq, buf); | |
227 | out: | |
228 | return ret; | |
229 | } | |
230 | ||
231 | static void sh_mobile_ceu_videobuf_queue(struct videobuf_queue *vq, | |
232 | struct videobuf_buffer *vb) | |
233 | { | |
234 | struct soc_camera_device *icd = vq->priv_data; | |
235 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
236 | struct sh_mobile_ceu_dev *pcdev = ici->priv; | |
237 | unsigned long flags; | |
238 | ||
86751b01 | 239 | dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__, |
0d3244d6 MD |
240 | vb, vb->baddr, vb->bsize); |
241 | ||
51354cc3 | 242 | vb->state = VIDEOBUF_QUEUED; |
0d3244d6 MD |
243 | spin_lock_irqsave(&pcdev->lock, flags); |
244 | list_add_tail(&vb->queue, &pcdev->capture); | |
245 | ||
246 | if (!pcdev->active) { | |
247 | pcdev->active = vb; | |
248 | sh_mobile_ceu_capture(pcdev); | |
249 | } | |
250 | ||
251 | spin_unlock_irqrestore(&pcdev->lock, flags); | |
252 | } | |
253 | ||
254 | static void sh_mobile_ceu_videobuf_release(struct videobuf_queue *vq, | |
255 | struct videobuf_buffer *vb) | |
256 | { | |
257 | free_buffer(vq, container_of(vb, struct sh_mobile_ceu_buffer, vb)); | |
258 | } | |
259 | ||
260 | static struct videobuf_queue_ops sh_mobile_ceu_videobuf_ops = { | |
261 | .buf_setup = sh_mobile_ceu_videobuf_setup, | |
262 | .buf_prepare = sh_mobile_ceu_videobuf_prepare, | |
263 | .buf_queue = sh_mobile_ceu_videobuf_queue, | |
264 | .buf_release = sh_mobile_ceu_videobuf_release, | |
265 | }; | |
266 | ||
267 | static irqreturn_t sh_mobile_ceu_irq(int irq, void *data) | |
268 | { | |
269 | struct sh_mobile_ceu_dev *pcdev = data; | |
270 | struct videobuf_buffer *vb; | |
271 | unsigned long flags; | |
272 | ||
273 | spin_lock_irqsave(&pcdev->lock, flags); | |
274 | ||
275 | vb = pcdev->active; | |
276 | list_del_init(&vb->queue); | |
277 | ||
278 | if (!list_empty(&pcdev->capture)) | |
279 | pcdev->active = list_entry(pcdev->capture.next, | |
280 | struct videobuf_buffer, queue); | |
281 | else | |
282 | pcdev->active = NULL; | |
283 | ||
284 | sh_mobile_ceu_capture(pcdev); | |
285 | ||
286 | vb->state = VIDEOBUF_DONE; | |
287 | do_gettimeofday(&vb->ts); | |
288 | vb->field_count++; | |
289 | wake_up(&vb->done); | |
290 | spin_unlock_irqrestore(&pcdev->lock, flags); | |
291 | ||
292 | return IRQ_HANDLED; | |
293 | } | |
294 | ||
295 | static int sh_mobile_ceu_add_device(struct soc_camera_device *icd) | |
296 | { | |
297 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
298 | struct sh_mobile_ceu_dev *pcdev = ici->priv; | |
299 | int ret = -EBUSY; | |
300 | ||
301 | mutex_lock(&camera_lock); | |
302 | ||
303 | if (pcdev->icd) | |
304 | goto err; | |
305 | ||
306 | dev_info(&icd->dev, | |
307 | "SuperH Mobile CEU driver attached to camera %d\n", | |
308 | icd->devnum); | |
309 | ||
0d3244d6 MD |
310 | ret = icd->ops->init(icd); |
311 | if (ret) | |
312 | goto err; | |
313 | ||
a42b6dd6 MD |
314 | clk_enable(pcdev->clk); |
315 | ||
0d3244d6 MD |
316 | ceu_write(pcdev, CAPSR, 1 << 16); /* reset */ |
317 | while (ceu_read(pcdev, CSTSR) & 1) | |
318 | msleep(1); | |
319 | ||
320 | pcdev->icd = icd; | |
321 | err: | |
322 | mutex_unlock(&camera_lock); | |
323 | ||
324 | return ret; | |
325 | } | |
326 | ||
327 | static void sh_mobile_ceu_remove_device(struct soc_camera_device *icd) | |
328 | { | |
329 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
330 | struct sh_mobile_ceu_dev *pcdev = ici->priv; | |
51354cc3 | 331 | unsigned long flags; |
0d3244d6 MD |
332 | |
333 | BUG_ON(icd != pcdev->icd); | |
334 | ||
335 | /* disable capture, disable interrupts */ | |
336 | ceu_write(pcdev, CEIER, 0); | |
337 | ceu_write(pcdev, CAPSR, 1 << 16); /* reset */ | |
51354cc3 MD |
338 | |
339 | /* make sure active buffer is canceled */ | |
340 | spin_lock_irqsave(&pcdev->lock, flags); | |
341 | if (pcdev->active) { | |
342 | list_del(&pcdev->active->queue); | |
343 | pcdev->active->state = VIDEOBUF_ERROR; | |
344 | wake_up_all(&pcdev->active->done); | |
345 | pcdev->active = NULL; | |
346 | } | |
347 | spin_unlock_irqrestore(&pcdev->lock, flags); | |
348 | ||
a42b6dd6 MD |
349 | clk_disable(pcdev->clk); |
350 | ||
0d3244d6 | 351 | icd->ops->release(icd); |
0d3244d6 MD |
352 | |
353 | dev_info(&icd->dev, | |
354 | "SuperH Mobile CEU driver detached from camera %d\n", | |
355 | icd->devnum); | |
356 | ||
357 | pcdev->icd = NULL; | |
358 | } | |
359 | ||
360 | static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd, | |
361 | __u32 pixfmt) | |
362 | { | |
363 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
364 | struct sh_mobile_ceu_dev *pcdev = ici->priv; | |
365 | int ret, buswidth, width, cfszr_width, cdwdr_width; | |
366 | unsigned long camera_flags, common_flags, value; | |
367 | ||
368 | camera_flags = icd->ops->query_bus_param(icd); | |
369 | common_flags = soc_camera_bus_param_compatible(camera_flags, | |
370 | pcdev->pdata->flags); | |
371 | if (!common_flags) | |
372 | return -EINVAL; | |
373 | ||
374 | ret = icd->ops->set_bus_param(icd, common_flags); | |
375 | if (ret < 0) | |
376 | return ret; | |
377 | ||
378 | switch (common_flags & SOCAM_DATAWIDTH_MASK) { | |
379 | case SOCAM_DATAWIDTH_8: | |
380 | buswidth = 8; | |
381 | break; | |
382 | case SOCAM_DATAWIDTH_16: | |
383 | buswidth = 16; | |
384 | break; | |
385 | default: | |
386 | return -EINVAL; | |
387 | } | |
388 | ||
389 | ceu_write(pcdev, CRCNTR, 0); | |
390 | ceu_write(pcdev, CRCMPR, 0); | |
391 | ||
392 | value = 0x00000010; | |
393 | value |= (common_flags & SOCAM_VSYNC_ACTIVE_LOW) ? (1 << 1) : 0; | |
394 | value |= (common_flags & SOCAM_HSYNC_ACTIVE_LOW) ? (1 << 0) : 0; | |
395 | value |= (buswidth == 16) ? (1 << 12) : 0; | |
396 | ceu_write(pcdev, CAMCR, value); | |
397 | ||
398 | ceu_write(pcdev, CAPCR, 0x00300000); | |
399 | ceu_write(pcdev, CAIFR, 0); | |
400 | ||
401 | mdelay(1); | |
402 | ||
403 | width = icd->width * (icd->current_fmt->depth / 8); | |
404 | width = (buswidth == 16) ? width / 2 : width; | |
405 | cfszr_width = (buswidth == 8) ? width / 2 : width; | |
406 | cdwdr_width = (buswidth == 16) ? width * 2 : width; | |
407 | ||
408 | ceu_write(pcdev, CAMOR, 0); | |
409 | ceu_write(pcdev, CAPWR, (icd->height << 16) | width); | |
410 | ceu_write(pcdev, CFLCR, 0); /* data fetch mode - no scaling */ | |
411 | ceu_write(pcdev, CFSZR, (icd->height << 16) | cfszr_width); | |
412 | ceu_write(pcdev, CLFCR, 0); /* data fetch mode - no lowpass filter */ | |
dd54203b MD |
413 | |
414 | /* A few words about byte order (observed in Big Endian mode) | |
415 | * | |
416 | * In data fetch mode bytes are received in chunks of 8 bytes. | |
417 | * D0, D1, D2, D3, D4, D5, D6, D7 (D0 received first) | |
418 | * | |
419 | * The data is however by default written to memory in reverse order: | |
420 | * D7, D6, D5, D4, D3, D2, D1, D0 (D7 written to lowest byte) | |
421 | * | |
422 | * The lowest three bits of CDOCR allows us to do swapping, | |
2c0a072e MD |
423 | * using 7 we swap the data bytes to match the incoming order: |
424 | * D0, D1, D2, D3, D4, D5, D6, D7 | |
dd54203b | 425 | */ |
2c0a072e | 426 | ceu_write(pcdev, CDOCR, 0x00000017); |
0d3244d6 MD |
427 | |
428 | ceu_write(pcdev, CDWDR, cdwdr_width); | |
429 | ceu_write(pcdev, CFWCR, 0); /* keep "datafetch firewall" disabled */ | |
430 | ||
431 | /* not in bundle mode: skip CBDSR, CDAYR2, CDACR2, CDBYR2, CDBCR2 */ | |
432 | /* in data fetch mode: no need for CDACR, CDBYR, CDBCR */ | |
433 | ||
434 | return 0; | |
435 | } | |
436 | ||
9414de39 | 437 | static int sh_mobile_ceu_try_bus_param(struct soc_camera_device *icd) |
0d3244d6 MD |
438 | { |
439 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
440 | struct sh_mobile_ceu_dev *pcdev = ici->priv; | |
441 | unsigned long camera_flags, common_flags; | |
442 | ||
443 | camera_flags = icd->ops->query_bus_param(icd); | |
444 | common_flags = soc_camera_bus_param_compatible(camera_flags, | |
445 | pcdev->pdata->flags); | |
446 | if (!common_flags) | |
447 | return -EINVAL; | |
448 | ||
449 | return 0; | |
450 | } | |
451 | ||
9414de39 MD |
452 | static int sh_mobile_ceu_get_formats(struct soc_camera_device *icd, int idx, |
453 | struct soc_camera_format_xlate *xlate) | |
454 | { | |
455 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
456 | int ret; | |
457 | int formats = 0; | |
458 | ||
459 | ret = sh_mobile_ceu_try_bus_param(icd); | |
460 | if (ret < 0) | |
461 | return 0; | |
462 | ||
463 | switch (icd->formats[idx].fourcc) { | |
464 | default: | |
465 | /* Generic pass-through */ | |
466 | formats++; | |
467 | if (xlate) { | |
468 | xlate->host_fmt = icd->formats + idx; | |
469 | xlate->cam_fmt = icd->formats + idx; | |
470 | xlate->buswidth = icd->formats[idx].depth; | |
471 | xlate++; | |
472 | dev_dbg(&ici->dev, | |
473 | "Providing format %s in pass-through mode\n", | |
474 | icd->formats[idx].name); | |
475 | } | |
476 | } | |
477 | ||
478 | return formats; | |
479 | } | |
480 | ||
d8fac217 GL |
481 | static int sh_mobile_ceu_set_fmt(struct soc_camera_device *icd, |
482 | __u32 pixfmt, struct v4l2_rect *rect) | |
0d3244d6 | 483 | { |
9414de39 MD |
484 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
485 | const struct soc_camera_format_xlate *xlate; | |
25c4d74e GL |
486 | int ret; |
487 | ||
9414de39 MD |
488 | xlate = soc_camera_xlate_by_fourcc(icd, pixfmt); |
489 | if (!xlate) { | |
490 | dev_warn(&ici->dev, "Format %x not found\n", pixfmt); | |
491 | return -EINVAL; | |
25c4d74e GL |
492 | } |
493 | ||
9414de39 MD |
494 | switch (pixfmt) { |
495 | case 0: /* Only geometry change */ | |
496 | ret = icd->ops->set_fmt(icd, pixfmt, rect); | |
497 | break; | |
498 | default: | |
499 | ret = icd->ops->set_fmt(icd, xlate->cam_fmt->fourcc, rect); | |
500 | } | |
501 | ||
502 | if (pixfmt && !ret) { | |
503 | icd->buswidth = xlate->buswidth; | |
504 | icd->current_fmt = xlate->host_fmt; | |
505 | } | |
25c4d74e GL |
506 | |
507 | return ret; | |
0d3244d6 MD |
508 | } |
509 | ||
d8fac217 GL |
510 | static int sh_mobile_ceu_try_fmt(struct soc_camera_device *icd, |
511 | struct v4l2_format *f) | |
0d3244d6 | 512 | { |
9414de39 MD |
513 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
514 | const struct soc_camera_format_xlate *xlate; | |
515 | __u32 pixfmt = f->fmt.pix.pixelformat; | |
a2c8c68c | 516 | |
9414de39 MD |
517 | xlate = soc_camera_xlate_by_fourcc(icd, pixfmt); |
518 | if (!xlate) { | |
519 | dev_warn(&ici->dev, "Format %x not found\n", pixfmt); | |
25c4d74e | 520 | return -EINVAL; |
9414de39 | 521 | } |
25c4d74e | 522 | |
0d3244d6 MD |
523 | /* FIXME: calculate using depth and bus width */ |
524 | ||
525 | if (f->fmt.pix.height < 4) | |
526 | f->fmt.pix.height = 4; | |
527 | if (f->fmt.pix.height > 1920) | |
528 | f->fmt.pix.height = 1920; | |
529 | if (f->fmt.pix.width < 2) | |
530 | f->fmt.pix.width = 2; | |
531 | if (f->fmt.pix.width > 2560) | |
532 | f->fmt.pix.width = 2560; | |
533 | f->fmt.pix.width &= ~0x01; | |
534 | f->fmt.pix.height &= ~0x03; | |
535 | ||
25c4d74e | 536 | f->fmt.pix.bytesperline = f->fmt.pix.width * |
9414de39 | 537 | DIV_ROUND_UP(xlate->host_fmt->depth, 8); |
25c4d74e GL |
538 | f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline; |
539 | ||
0d3244d6 | 540 | /* limit to sensor capabilities */ |
d8fac217 | 541 | return icd->ops->try_fmt(icd, f); |
0d3244d6 MD |
542 | } |
543 | ||
544 | static int sh_mobile_ceu_reqbufs(struct soc_camera_file *icf, | |
545 | struct v4l2_requestbuffers *p) | |
546 | { | |
547 | int i; | |
548 | ||
549 | /* This is for locking debugging only. I removed spinlocks and now I | |
550 | * check whether .prepare is ever called on a linked buffer, or whether | |
551 | * a dma IRQ can occur for an in-work or unlinked buffer. Until now | |
552 | * it hadn't triggered */ | |
553 | for (i = 0; i < p->count; i++) { | |
554 | struct sh_mobile_ceu_buffer *buf; | |
555 | ||
556 | buf = container_of(icf->vb_vidq.bufs[i], | |
557 | struct sh_mobile_ceu_buffer, vb); | |
558 | INIT_LIST_HEAD(&buf->vb.queue); | |
559 | } | |
560 | ||
561 | return 0; | |
562 | } | |
563 | ||
564 | static unsigned int sh_mobile_ceu_poll(struct file *file, poll_table *pt) | |
565 | { | |
566 | struct soc_camera_file *icf = file->private_data; | |
567 | struct sh_mobile_ceu_buffer *buf; | |
568 | ||
569 | buf = list_entry(icf->vb_vidq.stream.next, | |
570 | struct sh_mobile_ceu_buffer, vb.stream); | |
571 | ||
572 | poll_wait(file, &buf->vb.done, pt); | |
573 | ||
574 | if (buf->vb.state == VIDEOBUF_DONE || | |
575 | buf->vb.state == VIDEOBUF_ERROR) | |
576 | return POLLIN|POLLRDNORM; | |
577 | ||
578 | return 0; | |
579 | } | |
580 | ||
581 | static int sh_mobile_ceu_querycap(struct soc_camera_host *ici, | |
582 | struct v4l2_capability *cap) | |
583 | { | |
584 | strlcpy(cap->card, "SuperH_Mobile_CEU", sizeof(cap->card)); | |
585 | cap->version = KERNEL_VERSION(0, 0, 5); | |
586 | cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; | |
587 | return 0; | |
588 | } | |
589 | ||
590 | static void sh_mobile_ceu_init_videobuf(struct videobuf_queue *q, | |
591 | struct soc_camera_device *icd) | |
592 | { | |
593 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
594 | struct sh_mobile_ceu_dev *pcdev = ici->priv; | |
595 | ||
596 | videobuf_queue_dma_contig_init(q, | |
597 | &sh_mobile_ceu_videobuf_ops, | |
598 | &ici->dev, &pcdev->lock, | |
599 | V4L2_BUF_TYPE_VIDEO_CAPTURE, | |
600 | V4L2_FIELD_NONE, | |
601 | sizeof(struct sh_mobile_ceu_buffer), | |
602 | icd); | |
603 | } | |
604 | ||
605 | static struct soc_camera_host_ops sh_mobile_ceu_host_ops = { | |
606 | .owner = THIS_MODULE, | |
607 | .add = sh_mobile_ceu_add_device, | |
608 | .remove = sh_mobile_ceu_remove_device, | |
9414de39 | 609 | .get_formats = sh_mobile_ceu_get_formats, |
d8fac217 GL |
610 | .set_fmt = sh_mobile_ceu_set_fmt, |
611 | .try_fmt = sh_mobile_ceu_try_fmt, | |
0d3244d6 MD |
612 | .reqbufs = sh_mobile_ceu_reqbufs, |
613 | .poll = sh_mobile_ceu_poll, | |
614 | .querycap = sh_mobile_ceu_querycap, | |
0d3244d6 MD |
615 | .set_bus_param = sh_mobile_ceu_set_bus_param, |
616 | .init_videobuf = sh_mobile_ceu_init_videobuf, | |
617 | }; | |
618 | ||
619 | static int sh_mobile_ceu_probe(struct platform_device *pdev) | |
620 | { | |
621 | struct sh_mobile_ceu_dev *pcdev; | |
622 | struct resource *res; | |
623 | void __iomem *base; | |
a42b6dd6 | 624 | char clk_name[8]; |
0d3244d6 MD |
625 | unsigned int irq; |
626 | int err = 0; | |
627 | ||
628 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
629 | irq = platform_get_irq(pdev, 0); | |
630 | if (!res || !irq) { | |
631 | dev_err(&pdev->dev, "Not enough CEU platform resources.\n"); | |
632 | err = -ENODEV; | |
633 | goto exit; | |
634 | } | |
635 | ||
636 | pcdev = kzalloc(sizeof(*pcdev), GFP_KERNEL); | |
637 | if (!pcdev) { | |
638 | dev_err(&pdev->dev, "Could not allocate pcdev\n"); | |
639 | err = -ENOMEM; | |
640 | goto exit; | |
641 | } | |
642 | ||
643 | platform_set_drvdata(pdev, pcdev); | |
644 | INIT_LIST_HEAD(&pcdev->capture); | |
645 | spin_lock_init(&pcdev->lock); | |
646 | ||
647 | pcdev->pdata = pdev->dev.platform_data; | |
648 | if (!pcdev->pdata) { | |
649 | err = -EINVAL; | |
650 | dev_err(&pdev->dev, "CEU platform data not set.\n"); | |
651 | goto exit_kfree; | |
652 | } | |
653 | ||
654 | base = ioremap_nocache(res->start, res->end - res->start + 1); | |
655 | if (!base) { | |
656 | err = -ENXIO; | |
657 | dev_err(&pdev->dev, "Unable to ioremap CEU registers.\n"); | |
658 | goto exit_kfree; | |
659 | } | |
660 | ||
661 | pcdev->irq = irq; | |
662 | pcdev->base = base; | |
663 | pcdev->video_limit = 0; /* only enabled if second resource exists */ | |
664 | pcdev->dev = &pdev->dev; | |
665 | ||
666 | res = platform_get_resource(pdev, IORESOURCE_MEM, 1); | |
667 | if (res) { | |
668 | err = dma_declare_coherent_memory(&pdev->dev, res->start, | |
669 | res->start, | |
670 | (res->end - res->start) + 1, | |
671 | DMA_MEMORY_MAP | | |
672 | DMA_MEMORY_EXCLUSIVE); | |
673 | if (!err) { | |
674 | dev_err(&pdev->dev, "Unable to declare CEU memory.\n"); | |
675 | err = -ENXIO; | |
676 | goto exit_iounmap; | |
677 | } | |
678 | ||
679 | pcdev->video_limit = (res->end - res->start) + 1; | |
680 | } | |
681 | ||
682 | /* request irq */ | |
683 | err = request_irq(pcdev->irq, sh_mobile_ceu_irq, IRQF_DISABLED, | |
af128a10 | 684 | dev_name(&pdev->dev), pcdev); |
0d3244d6 MD |
685 | if (err) { |
686 | dev_err(&pdev->dev, "Unable to register CEU interrupt.\n"); | |
687 | goto exit_release_mem; | |
688 | } | |
689 | ||
a42b6dd6 MD |
690 | snprintf(clk_name, sizeof(clk_name), "ceu%d", pdev->id); |
691 | pcdev->clk = clk_get(&pdev->dev, clk_name); | |
692 | if (IS_ERR(pcdev->clk)) { | |
693 | dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name); | |
694 | err = PTR_ERR(pcdev->clk); | |
695 | goto exit_free_irq; | |
696 | } | |
697 | ||
0d3244d6 MD |
698 | pcdev->ici.priv = pcdev; |
699 | pcdev->ici.dev.parent = &pdev->dev; | |
700 | pcdev->ici.nr = pdev->id; | |
af128a10 KS |
701 | pcdev->ici.drv_name = dev_name(&pdev->dev); |
702 | pcdev->ici.ops = &sh_mobile_ceu_host_ops; | |
0d3244d6 MD |
703 | |
704 | err = soc_camera_host_register(&pcdev->ici); | |
705 | if (err) | |
a42b6dd6 | 706 | goto exit_free_clk; |
0d3244d6 MD |
707 | |
708 | return 0; | |
709 | ||
a42b6dd6 MD |
710 | exit_free_clk: |
711 | clk_put(pcdev->clk); | |
0d3244d6 MD |
712 | exit_free_irq: |
713 | free_irq(pcdev->irq, pcdev); | |
714 | exit_release_mem: | |
715 | if (platform_get_resource(pdev, IORESOURCE_MEM, 1)) | |
716 | dma_release_declared_memory(&pdev->dev); | |
717 | exit_iounmap: | |
718 | iounmap(base); | |
719 | exit_kfree: | |
720 | kfree(pcdev); | |
721 | exit: | |
722 | return err; | |
723 | } | |
724 | ||
725 | static int sh_mobile_ceu_remove(struct platform_device *pdev) | |
726 | { | |
727 | struct sh_mobile_ceu_dev *pcdev = platform_get_drvdata(pdev); | |
728 | ||
729 | soc_camera_host_unregister(&pcdev->ici); | |
a42b6dd6 | 730 | clk_put(pcdev->clk); |
0d3244d6 MD |
731 | free_irq(pcdev->irq, pcdev); |
732 | if (platform_get_resource(pdev, IORESOURCE_MEM, 1)) | |
733 | dma_release_declared_memory(&pdev->dev); | |
734 | iounmap(pcdev->base); | |
735 | kfree(pcdev); | |
736 | return 0; | |
737 | } | |
738 | ||
739 | static struct platform_driver sh_mobile_ceu_driver = { | |
740 | .driver = { | |
741 | .name = "sh_mobile_ceu", | |
742 | }, | |
743 | .probe = sh_mobile_ceu_probe, | |
744 | .remove = sh_mobile_ceu_remove, | |
745 | }; | |
746 | ||
747 | static int __init sh_mobile_ceu_init(void) | |
748 | { | |
749 | return platform_driver_register(&sh_mobile_ceu_driver); | |
750 | } | |
751 | ||
752 | static void __exit sh_mobile_ceu_exit(void) | |
753 | { | |
01c1e4ca | 754 | platform_driver_unregister(&sh_mobile_ceu_driver); |
0d3244d6 MD |
755 | } |
756 | ||
757 | module_init(sh_mobile_ceu_init); | |
758 | module_exit(sh_mobile_ceu_exit); | |
759 | ||
760 | MODULE_DESCRIPTION("SuperH Mobile CEU driver"); | |
761 | MODULE_AUTHOR("Magnus Damm"); | |
762 | MODULE_LICENSE("GPL"); |