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; | |
8be65dc5 MD |
99 | |
100 | const struct soc_camera_data_format *camera_fmt; | |
0d3244d6 MD |
101 | }; |
102 | ||
103 | static void ceu_write(struct sh_mobile_ceu_dev *priv, | |
7a1a8164 | 104 | unsigned long reg_offs, u32 data) |
0d3244d6 MD |
105 | { |
106 | iowrite32(data, priv->base + reg_offs); | |
107 | } | |
108 | ||
7a1a8164 | 109 | static u32 ceu_read(struct sh_mobile_ceu_dev *priv, unsigned long reg_offs) |
0d3244d6 MD |
110 | { |
111 | return ioread32(priv->base + reg_offs); | |
112 | } | |
113 | ||
114 | /* | |
115 | * Videobuf operations | |
116 | */ | |
117 | static int sh_mobile_ceu_videobuf_setup(struct videobuf_queue *vq, | |
118 | unsigned int *count, | |
119 | unsigned int *size) | |
120 | { | |
121 | struct soc_camera_device *icd = vq->priv_data; | |
122 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
123 | struct sh_mobile_ceu_dev *pcdev = ici->priv; | |
124 | int bytes_per_pixel = (icd->current_fmt->depth + 7) >> 3; | |
125 | ||
126 | *size = PAGE_ALIGN(icd->width * icd->height * bytes_per_pixel); | |
127 | ||
128 | if (0 == *count) | |
129 | *count = 2; | |
130 | ||
131 | if (pcdev->video_limit) { | |
132 | while (*size * *count > pcdev->video_limit) | |
133 | (*count)--; | |
134 | } | |
135 | ||
136 | dev_dbg(&icd->dev, "count=%d, size=%d\n", *count, *size); | |
137 | ||
138 | return 0; | |
139 | } | |
140 | ||
141 | static void free_buffer(struct videobuf_queue *vq, | |
142 | struct sh_mobile_ceu_buffer *buf) | |
143 | { | |
144 | struct soc_camera_device *icd = vq->priv_data; | |
145 | ||
86751b01 | 146 | dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__, |
0d3244d6 MD |
147 | &buf->vb, buf->vb.baddr, buf->vb.bsize); |
148 | ||
149 | if (in_interrupt()) | |
150 | BUG(); | |
151 | ||
152 | videobuf_dma_contig_free(vq, &buf->vb); | |
153 | dev_dbg(&icd->dev, "%s freed\n", __func__); | |
154 | buf->vb.state = VIDEOBUF_NEEDS_INIT; | |
155 | } | |
156 | ||
7a1a8164 MD |
157 | #define CEU_CETCR_MAGIC 0x0317f313 /* acknowledge magical interrupt sources */ |
158 | #define CEU_CETCR_IGRW (1 << 4) /* prohibited register access interrupt bit */ | |
159 | #define CEU_CEIER_CPEIE (1 << 0) /* one-frame capture end interrupt */ | |
160 | #define CEU_CAPCR_CTNCP (1 << 16) /* continuous capture mode (if set) */ | |
161 | ||
162 | ||
0d3244d6 MD |
163 | static void sh_mobile_ceu_capture(struct sh_mobile_ceu_dev *pcdev) |
164 | { | |
8be65dc5 | 165 | struct soc_camera_device *icd = pcdev->icd; |
7a1a8164 MD |
166 | dma_addr_t phys_addr; |
167 | ||
168 | /* The hardware is _very_ picky about this sequence. Especially | |
169 | * the CEU_CETCR_MAGIC value. It seems like we need to acknowledge | |
170 | * several not-so-well documented interrupt sources in CETCR. | |
171 | */ | |
172 | ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) & ~CEU_CEIER_CPEIE); | |
173 | ceu_write(pcdev, CETCR, ~ceu_read(pcdev, CETCR) & CEU_CETCR_MAGIC); | |
174 | ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) | CEU_CEIER_CPEIE); | |
175 | ceu_write(pcdev, CAPCR, ceu_read(pcdev, CAPCR) & ~CEU_CAPCR_CTNCP); | |
176 | ceu_write(pcdev, CETCR, CEU_CETCR_MAGIC ^ CEU_CETCR_IGRW); | |
0d3244d6 | 177 | |
8be65dc5 MD |
178 | if (!pcdev->active) |
179 | return; | |
180 | ||
181 | phys_addr = videobuf_to_dma_contig(pcdev->active); | |
182 | ceu_write(pcdev, CDAYR, phys_addr); | |
183 | ||
184 | switch (icd->current_fmt->fourcc) { | |
185 | case V4L2_PIX_FMT_NV12: | |
186 | case V4L2_PIX_FMT_NV21: | |
9e4a56d2 MD |
187 | case V4L2_PIX_FMT_NV16: |
188 | case V4L2_PIX_FMT_NV61: | |
7a1a8164 | 189 | phys_addr += icd->width * icd->height; |
8be65dc5 | 190 | ceu_write(pcdev, CDACR, phys_addr); |
0d3244d6 | 191 | } |
8be65dc5 MD |
192 | |
193 | pcdev->active->state = VIDEOBUF_ACTIVE; | |
194 | ceu_write(pcdev, CAPSR, 0x1); /* start capture */ | |
0d3244d6 MD |
195 | } |
196 | ||
197 | static int sh_mobile_ceu_videobuf_prepare(struct videobuf_queue *vq, | |
198 | struct videobuf_buffer *vb, | |
199 | enum v4l2_field field) | |
200 | { | |
201 | struct soc_camera_device *icd = vq->priv_data; | |
202 | struct sh_mobile_ceu_buffer *buf; | |
203 | int ret; | |
204 | ||
205 | buf = container_of(vb, struct sh_mobile_ceu_buffer, vb); | |
206 | ||
86751b01 | 207 | dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__, |
0d3244d6 MD |
208 | vb, vb->baddr, vb->bsize); |
209 | ||
210 | /* Added list head initialization on alloc */ | |
211 | WARN_ON(!list_empty(&vb->queue)); | |
212 | ||
213 | #ifdef DEBUG | |
214 | /* This can be useful if you want to see if we actually fill | |
215 | * the buffer with something */ | |
216 | memset((void *)vb->baddr, 0xaa, vb->bsize); | |
217 | #endif | |
218 | ||
219 | BUG_ON(NULL == icd->current_fmt); | |
220 | ||
221 | if (buf->fmt != icd->current_fmt || | |
222 | vb->width != icd->width || | |
223 | vb->height != icd->height || | |
224 | vb->field != field) { | |
225 | buf->fmt = icd->current_fmt; | |
226 | vb->width = icd->width; | |
227 | vb->height = icd->height; | |
228 | vb->field = field; | |
229 | vb->state = VIDEOBUF_NEEDS_INIT; | |
230 | } | |
231 | ||
232 | vb->size = vb->width * vb->height * ((buf->fmt->depth + 7) >> 3); | |
233 | if (0 != vb->baddr && vb->bsize < vb->size) { | |
234 | ret = -EINVAL; | |
235 | goto out; | |
236 | } | |
237 | ||
238 | if (vb->state == VIDEOBUF_NEEDS_INIT) { | |
239 | ret = videobuf_iolock(vq, vb, NULL); | |
240 | if (ret) | |
241 | goto fail; | |
242 | vb->state = VIDEOBUF_PREPARED; | |
243 | } | |
244 | ||
245 | return 0; | |
246 | fail: | |
247 | free_buffer(vq, buf); | |
248 | out: | |
249 | return ret; | |
250 | } | |
251 | ||
252 | static void sh_mobile_ceu_videobuf_queue(struct videobuf_queue *vq, | |
253 | struct videobuf_buffer *vb) | |
254 | { | |
255 | struct soc_camera_device *icd = vq->priv_data; | |
256 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
257 | struct sh_mobile_ceu_dev *pcdev = ici->priv; | |
258 | unsigned long flags; | |
259 | ||
86751b01 | 260 | dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__, |
0d3244d6 MD |
261 | vb, vb->baddr, vb->bsize); |
262 | ||
51354cc3 | 263 | vb->state = VIDEOBUF_QUEUED; |
0d3244d6 MD |
264 | spin_lock_irqsave(&pcdev->lock, flags); |
265 | list_add_tail(&vb->queue, &pcdev->capture); | |
266 | ||
267 | if (!pcdev->active) { | |
268 | pcdev->active = vb; | |
269 | sh_mobile_ceu_capture(pcdev); | |
270 | } | |
271 | ||
272 | spin_unlock_irqrestore(&pcdev->lock, flags); | |
273 | } | |
274 | ||
275 | static void sh_mobile_ceu_videobuf_release(struct videobuf_queue *vq, | |
276 | struct videobuf_buffer *vb) | |
277 | { | |
278 | free_buffer(vq, container_of(vb, struct sh_mobile_ceu_buffer, vb)); | |
279 | } | |
280 | ||
281 | static struct videobuf_queue_ops sh_mobile_ceu_videobuf_ops = { | |
282 | .buf_setup = sh_mobile_ceu_videobuf_setup, | |
283 | .buf_prepare = sh_mobile_ceu_videobuf_prepare, | |
284 | .buf_queue = sh_mobile_ceu_videobuf_queue, | |
285 | .buf_release = sh_mobile_ceu_videobuf_release, | |
286 | }; | |
287 | ||
288 | static irqreturn_t sh_mobile_ceu_irq(int irq, void *data) | |
289 | { | |
290 | struct sh_mobile_ceu_dev *pcdev = data; | |
291 | struct videobuf_buffer *vb; | |
292 | unsigned long flags; | |
293 | ||
294 | spin_lock_irqsave(&pcdev->lock, flags); | |
295 | ||
296 | vb = pcdev->active; | |
297 | list_del_init(&vb->queue); | |
298 | ||
299 | if (!list_empty(&pcdev->capture)) | |
300 | pcdev->active = list_entry(pcdev->capture.next, | |
301 | struct videobuf_buffer, queue); | |
302 | else | |
303 | pcdev->active = NULL; | |
304 | ||
305 | sh_mobile_ceu_capture(pcdev); | |
306 | ||
307 | vb->state = VIDEOBUF_DONE; | |
308 | do_gettimeofday(&vb->ts); | |
309 | vb->field_count++; | |
310 | wake_up(&vb->done); | |
311 | spin_unlock_irqrestore(&pcdev->lock, flags); | |
312 | ||
313 | return IRQ_HANDLED; | |
314 | } | |
315 | ||
1c3bb743 | 316 | /* Called with .video_lock held */ |
0d3244d6 MD |
317 | static int sh_mobile_ceu_add_device(struct soc_camera_device *icd) |
318 | { | |
319 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
320 | struct sh_mobile_ceu_dev *pcdev = ici->priv; | |
321 | int ret = -EBUSY; | |
322 | ||
0d3244d6 MD |
323 | if (pcdev->icd) |
324 | goto err; | |
325 | ||
326 | dev_info(&icd->dev, | |
327 | "SuperH Mobile CEU driver attached to camera %d\n", | |
328 | icd->devnum); | |
329 | ||
0d3244d6 MD |
330 | ret = icd->ops->init(icd); |
331 | if (ret) | |
332 | goto err; | |
333 | ||
a42b6dd6 MD |
334 | clk_enable(pcdev->clk); |
335 | ||
0d3244d6 MD |
336 | ceu_write(pcdev, CAPSR, 1 << 16); /* reset */ |
337 | while (ceu_read(pcdev, CSTSR) & 1) | |
338 | msleep(1); | |
339 | ||
340 | pcdev->icd = icd; | |
341 | err: | |
0d3244d6 MD |
342 | return ret; |
343 | } | |
344 | ||
1c3bb743 | 345 | /* Called with .video_lock held */ |
0d3244d6 MD |
346 | static void sh_mobile_ceu_remove_device(struct soc_camera_device *icd) |
347 | { | |
348 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
349 | struct sh_mobile_ceu_dev *pcdev = ici->priv; | |
51354cc3 | 350 | unsigned long flags; |
0d3244d6 MD |
351 | |
352 | BUG_ON(icd != pcdev->icd); | |
353 | ||
354 | /* disable capture, disable interrupts */ | |
355 | ceu_write(pcdev, CEIER, 0); | |
356 | ceu_write(pcdev, CAPSR, 1 << 16); /* reset */ | |
51354cc3 MD |
357 | |
358 | /* make sure active buffer is canceled */ | |
359 | spin_lock_irqsave(&pcdev->lock, flags); | |
360 | if (pcdev->active) { | |
361 | list_del(&pcdev->active->queue); | |
362 | pcdev->active->state = VIDEOBUF_ERROR; | |
363 | wake_up_all(&pcdev->active->done); | |
364 | pcdev->active = NULL; | |
365 | } | |
366 | spin_unlock_irqrestore(&pcdev->lock, flags); | |
367 | ||
a42b6dd6 MD |
368 | clk_disable(pcdev->clk); |
369 | ||
0d3244d6 | 370 | icd->ops->release(icd); |
0d3244d6 MD |
371 | |
372 | dev_info(&icd->dev, | |
373 | "SuperH Mobile CEU driver detached from camera %d\n", | |
374 | icd->devnum); | |
375 | ||
376 | pcdev->icd = NULL; | |
377 | } | |
378 | ||
379 | static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd, | |
380 | __u32 pixfmt) | |
381 | { | |
382 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
383 | struct sh_mobile_ceu_dev *pcdev = ici->priv; | |
384 | int ret, buswidth, width, cfszr_width, cdwdr_width; | |
385 | unsigned long camera_flags, common_flags, value; | |
8be65dc5 | 386 | int yuv_mode, yuv_lineskip; |
0d3244d6 MD |
387 | |
388 | camera_flags = icd->ops->query_bus_param(icd); | |
389 | common_flags = soc_camera_bus_param_compatible(camera_flags, | |
390 | pcdev->pdata->flags); | |
391 | if (!common_flags) | |
392 | return -EINVAL; | |
393 | ||
394 | ret = icd->ops->set_bus_param(icd, common_flags); | |
395 | if (ret < 0) | |
396 | return ret; | |
397 | ||
398 | switch (common_flags & SOCAM_DATAWIDTH_MASK) { | |
399 | case SOCAM_DATAWIDTH_8: | |
400 | buswidth = 8; | |
401 | break; | |
402 | case SOCAM_DATAWIDTH_16: | |
403 | buswidth = 16; | |
404 | break; | |
405 | default: | |
406 | return -EINVAL; | |
407 | } | |
408 | ||
409 | ceu_write(pcdev, CRCNTR, 0); | |
410 | ceu_write(pcdev, CRCMPR, 0); | |
411 | ||
8be65dc5 MD |
412 | value = 0x00000010; /* data fetch by default */ |
413 | yuv_mode = yuv_lineskip = 0; | |
414 | ||
415 | switch (icd->current_fmt->fourcc) { | |
416 | case V4L2_PIX_FMT_NV12: | |
417 | case V4L2_PIX_FMT_NV21: | |
418 | yuv_lineskip = 1; /* skip for NV12/21, no skip for NV16/61 */ | |
9e4a56d2 MD |
419 | /* fall-through */ |
420 | case V4L2_PIX_FMT_NV16: | |
421 | case V4L2_PIX_FMT_NV61: | |
8be65dc5 MD |
422 | yuv_mode = 1; |
423 | switch (pcdev->camera_fmt->fourcc) { | |
424 | case V4L2_PIX_FMT_UYVY: | |
425 | value = 0x00000000; /* Cb0, Y0, Cr0, Y1 */ | |
426 | break; | |
427 | case V4L2_PIX_FMT_VYUY: | |
428 | value = 0x00000100; /* Cr0, Y0, Cb0, Y1 */ | |
429 | break; | |
430 | case V4L2_PIX_FMT_YUYV: | |
431 | value = 0x00000200; /* Y0, Cb0, Y1, Cr0 */ | |
432 | break; | |
433 | case V4L2_PIX_FMT_YVYU: | |
434 | value = 0x00000300; /* Y0, Cr0, Y1, Cb0 */ | |
435 | break; | |
436 | default: | |
437 | BUG(); | |
438 | } | |
439 | } | |
440 | ||
7a1a8164 MD |
441 | if (icd->current_fmt->fourcc == V4L2_PIX_FMT_NV21 || |
442 | icd->current_fmt->fourcc == V4L2_PIX_FMT_NV61) | |
9e4a56d2 | 443 | value ^= 0x00000100; /* swap U, V to change from NV1x->NVx1 */ |
8be65dc5 | 444 | |
7a1a8164 MD |
445 | value |= common_flags & SOCAM_VSYNC_ACTIVE_LOW ? 1 << 1 : 0; |
446 | value |= common_flags & SOCAM_HSYNC_ACTIVE_LOW ? 1 << 0 : 0; | |
447 | value |= buswidth == 16 ? 1 << 12 : 0; | |
0d3244d6 MD |
448 | ceu_write(pcdev, CAMCR, value); |
449 | ||
450 | ceu_write(pcdev, CAPCR, 0x00300000); | |
451 | ceu_write(pcdev, CAIFR, 0); | |
452 | ||
453 | mdelay(1); | |
454 | ||
8be65dc5 MD |
455 | if (yuv_mode) { |
456 | width = icd->width * 2; | |
7a1a8164 | 457 | width = buswidth == 16 ? width / 2 : width; |
8be65dc5 MD |
458 | cfszr_width = cdwdr_width = icd->width; |
459 | } else { | |
460 | width = icd->width * ((icd->current_fmt->depth + 7) >> 3); | |
7a1a8164 MD |
461 | width = buswidth == 16 ? width / 2 : width; |
462 | cfszr_width = buswidth == 8 ? width / 2 : width; | |
463 | cdwdr_width = buswidth == 16 ? width * 2 : width; | |
8be65dc5 | 464 | } |
0d3244d6 MD |
465 | |
466 | ceu_write(pcdev, CAMOR, 0); | |
467 | ceu_write(pcdev, CAPWR, (icd->height << 16) | width); | |
8be65dc5 | 468 | ceu_write(pcdev, CFLCR, 0); /* no scaling */ |
0d3244d6 | 469 | ceu_write(pcdev, CFSZR, (icd->height << 16) | cfszr_width); |
8be65dc5 | 470 | ceu_write(pcdev, CLFCR, 0); /* no lowpass filter */ |
dd54203b MD |
471 | |
472 | /* A few words about byte order (observed in Big Endian mode) | |
473 | * | |
474 | * In data fetch mode bytes are received in chunks of 8 bytes. | |
475 | * D0, D1, D2, D3, D4, D5, D6, D7 (D0 received first) | |
476 | * | |
477 | * The data is however by default written to memory in reverse order: | |
478 | * D7, D6, D5, D4, D3, D2, D1, D0 (D7 written to lowest byte) | |
479 | * | |
480 | * The lowest three bits of CDOCR allows us to do swapping, | |
2c0a072e MD |
481 | * using 7 we swap the data bytes to match the incoming order: |
482 | * D0, D1, D2, D3, D4, D5, D6, D7 | |
dd54203b | 483 | */ |
8be65dc5 MD |
484 | value = 0x00000017; |
485 | if (yuv_lineskip) | |
486 | value &= ~0x00000010; /* convert 4:2:2 -> 4:2:0 */ | |
487 | ||
488 | ceu_write(pcdev, CDOCR, value); | |
0d3244d6 MD |
489 | |
490 | ceu_write(pcdev, CDWDR, cdwdr_width); | |
491 | ceu_write(pcdev, CFWCR, 0); /* keep "datafetch firewall" disabled */ | |
492 | ||
493 | /* not in bundle mode: skip CBDSR, CDAYR2, CDACR2, CDBYR2, CDBCR2 */ | |
0d3244d6 MD |
494 | return 0; |
495 | } | |
496 | ||
9414de39 | 497 | static int sh_mobile_ceu_try_bus_param(struct soc_camera_device *icd) |
0d3244d6 MD |
498 | { |
499 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
500 | struct sh_mobile_ceu_dev *pcdev = ici->priv; | |
501 | unsigned long camera_flags, common_flags; | |
502 | ||
503 | camera_flags = icd->ops->query_bus_param(icd); | |
504 | common_flags = soc_camera_bus_param_compatible(camera_flags, | |
505 | pcdev->pdata->flags); | |
506 | if (!common_flags) | |
507 | return -EINVAL; | |
508 | ||
509 | return 0; | |
510 | } | |
511 | ||
8be65dc5 MD |
512 | static const struct soc_camera_data_format sh_mobile_ceu_formats[] = { |
513 | { | |
514 | .name = "NV12", | |
515 | .depth = 12, | |
516 | .fourcc = V4L2_PIX_FMT_NV12, | |
517 | .colorspace = V4L2_COLORSPACE_JPEG, | |
518 | }, | |
519 | { | |
520 | .name = "NV21", | |
521 | .depth = 12, | |
522 | .fourcc = V4L2_PIX_FMT_NV21, | |
523 | .colorspace = V4L2_COLORSPACE_JPEG, | |
524 | }, | |
9e4a56d2 MD |
525 | { |
526 | .name = "NV16", | |
527 | .depth = 16, | |
528 | .fourcc = V4L2_PIX_FMT_NV16, | |
529 | .colorspace = V4L2_COLORSPACE_JPEG, | |
530 | }, | |
531 | { | |
532 | .name = "NV61", | |
533 | .depth = 16, | |
534 | .fourcc = V4L2_PIX_FMT_NV61, | |
535 | .colorspace = V4L2_COLORSPACE_JPEG, | |
536 | }, | |
8be65dc5 MD |
537 | }; |
538 | ||
9414de39 MD |
539 | static int sh_mobile_ceu_get_formats(struct soc_camera_device *icd, int idx, |
540 | struct soc_camera_format_xlate *xlate) | |
541 | { | |
542 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
8be65dc5 | 543 | int ret, k, n; |
9414de39 MD |
544 | int formats = 0; |
545 | ||
546 | ret = sh_mobile_ceu_try_bus_param(icd); | |
547 | if (ret < 0) | |
548 | return 0; | |
549 | ||
550 | switch (icd->formats[idx].fourcc) { | |
8be65dc5 MD |
551 | case V4L2_PIX_FMT_UYVY: |
552 | case V4L2_PIX_FMT_VYUY: | |
553 | case V4L2_PIX_FMT_YUYV: | |
554 | case V4L2_PIX_FMT_YVYU: | |
555 | n = ARRAY_SIZE(sh_mobile_ceu_formats); | |
556 | formats += n; | |
557 | for (k = 0; xlate && k < n; k++) { | |
558 | xlate->host_fmt = &sh_mobile_ceu_formats[k]; | |
559 | xlate->cam_fmt = icd->formats + idx; | |
560 | xlate->buswidth = icd->formats[idx].depth; | |
561 | xlate++; | |
562 | dev_dbg(&ici->dev, "Providing format %s using %s\n", | |
563 | sh_mobile_ceu_formats[k].name, | |
564 | icd->formats[idx].name); | |
565 | } | |
9414de39 MD |
566 | default: |
567 | /* Generic pass-through */ | |
568 | formats++; | |
569 | if (xlate) { | |
570 | xlate->host_fmt = icd->formats + idx; | |
571 | xlate->cam_fmt = icd->formats + idx; | |
572 | xlate->buswidth = icd->formats[idx].depth; | |
573 | xlate++; | |
574 | dev_dbg(&ici->dev, | |
575 | "Providing format %s in pass-through mode\n", | |
576 | icd->formats[idx].name); | |
577 | } | |
578 | } | |
579 | ||
580 | return formats; | |
581 | } | |
582 | ||
d8fac217 GL |
583 | static int sh_mobile_ceu_set_fmt(struct soc_camera_device *icd, |
584 | __u32 pixfmt, struct v4l2_rect *rect) | |
0d3244d6 | 585 | { |
9414de39 | 586 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
8be65dc5 | 587 | struct sh_mobile_ceu_dev *pcdev = ici->priv; |
9414de39 | 588 | const struct soc_camera_format_xlate *xlate; |
25c4d74e GL |
589 | int ret; |
590 | ||
9414de39 MD |
591 | xlate = soc_camera_xlate_by_fourcc(icd, pixfmt); |
592 | if (!xlate) { | |
593 | dev_warn(&ici->dev, "Format %x not found\n", pixfmt); | |
594 | return -EINVAL; | |
25c4d74e GL |
595 | } |
596 | ||
9414de39 MD |
597 | switch (pixfmt) { |
598 | case 0: /* Only geometry change */ | |
599 | ret = icd->ops->set_fmt(icd, pixfmt, rect); | |
600 | break; | |
601 | default: | |
602 | ret = icd->ops->set_fmt(icd, xlate->cam_fmt->fourcc, rect); | |
603 | } | |
604 | ||
605 | if (pixfmt && !ret) { | |
606 | icd->buswidth = xlate->buswidth; | |
607 | icd->current_fmt = xlate->host_fmt; | |
8be65dc5 | 608 | pcdev->camera_fmt = xlate->cam_fmt; |
9414de39 | 609 | } |
25c4d74e GL |
610 | |
611 | return ret; | |
0d3244d6 MD |
612 | } |
613 | ||
d8fac217 GL |
614 | static int sh_mobile_ceu_try_fmt(struct soc_camera_device *icd, |
615 | struct v4l2_format *f) | |
0d3244d6 | 616 | { |
9414de39 MD |
617 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
618 | const struct soc_camera_format_xlate *xlate; | |
619 | __u32 pixfmt = f->fmt.pix.pixelformat; | |
a2c8c68c | 620 | |
9414de39 MD |
621 | xlate = soc_camera_xlate_by_fourcc(icd, pixfmt); |
622 | if (!xlate) { | |
623 | dev_warn(&ici->dev, "Format %x not found\n", pixfmt); | |
25c4d74e | 624 | return -EINVAL; |
9414de39 | 625 | } |
25c4d74e | 626 | |
0d3244d6 MD |
627 | /* FIXME: calculate using depth and bus width */ |
628 | ||
629 | if (f->fmt.pix.height < 4) | |
630 | f->fmt.pix.height = 4; | |
631 | if (f->fmt.pix.height > 1920) | |
632 | f->fmt.pix.height = 1920; | |
633 | if (f->fmt.pix.width < 2) | |
634 | f->fmt.pix.width = 2; | |
635 | if (f->fmt.pix.width > 2560) | |
636 | f->fmt.pix.width = 2560; | |
637 | f->fmt.pix.width &= ~0x01; | |
638 | f->fmt.pix.height &= ~0x03; | |
639 | ||
25c4d74e | 640 | f->fmt.pix.bytesperline = f->fmt.pix.width * |
9414de39 | 641 | DIV_ROUND_UP(xlate->host_fmt->depth, 8); |
25c4d74e GL |
642 | f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline; |
643 | ||
0d3244d6 | 644 | /* limit to sensor capabilities */ |
d8fac217 | 645 | return icd->ops->try_fmt(icd, f); |
0d3244d6 MD |
646 | } |
647 | ||
648 | static int sh_mobile_ceu_reqbufs(struct soc_camera_file *icf, | |
649 | struct v4l2_requestbuffers *p) | |
650 | { | |
651 | int i; | |
652 | ||
653 | /* This is for locking debugging only. I removed spinlocks and now I | |
654 | * check whether .prepare is ever called on a linked buffer, or whether | |
655 | * a dma IRQ can occur for an in-work or unlinked buffer. Until now | |
656 | * it hadn't triggered */ | |
657 | for (i = 0; i < p->count; i++) { | |
658 | struct sh_mobile_ceu_buffer *buf; | |
659 | ||
660 | buf = container_of(icf->vb_vidq.bufs[i], | |
661 | struct sh_mobile_ceu_buffer, vb); | |
662 | INIT_LIST_HEAD(&buf->vb.queue); | |
663 | } | |
664 | ||
665 | return 0; | |
666 | } | |
667 | ||
668 | static unsigned int sh_mobile_ceu_poll(struct file *file, poll_table *pt) | |
669 | { | |
670 | struct soc_camera_file *icf = file->private_data; | |
671 | struct sh_mobile_ceu_buffer *buf; | |
672 | ||
673 | buf = list_entry(icf->vb_vidq.stream.next, | |
674 | struct sh_mobile_ceu_buffer, vb.stream); | |
675 | ||
676 | poll_wait(file, &buf->vb.done, pt); | |
677 | ||
678 | if (buf->vb.state == VIDEOBUF_DONE || | |
679 | buf->vb.state == VIDEOBUF_ERROR) | |
680 | return POLLIN|POLLRDNORM; | |
681 | ||
682 | return 0; | |
683 | } | |
684 | ||
685 | static int sh_mobile_ceu_querycap(struct soc_camera_host *ici, | |
686 | struct v4l2_capability *cap) | |
687 | { | |
688 | strlcpy(cap->card, "SuperH_Mobile_CEU", sizeof(cap->card)); | |
689 | cap->version = KERNEL_VERSION(0, 0, 5); | |
690 | cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; | |
691 | return 0; | |
692 | } | |
693 | ||
694 | static void sh_mobile_ceu_init_videobuf(struct videobuf_queue *q, | |
695 | struct soc_camera_device *icd) | |
696 | { | |
697 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
698 | struct sh_mobile_ceu_dev *pcdev = ici->priv; | |
699 | ||
700 | videobuf_queue_dma_contig_init(q, | |
701 | &sh_mobile_ceu_videobuf_ops, | |
702 | &ici->dev, &pcdev->lock, | |
703 | V4L2_BUF_TYPE_VIDEO_CAPTURE, | |
704 | V4L2_FIELD_NONE, | |
705 | sizeof(struct sh_mobile_ceu_buffer), | |
706 | icd); | |
707 | } | |
708 | ||
709 | static struct soc_camera_host_ops sh_mobile_ceu_host_ops = { | |
710 | .owner = THIS_MODULE, | |
711 | .add = sh_mobile_ceu_add_device, | |
712 | .remove = sh_mobile_ceu_remove_device, | |
9414de39 | 713 | .get_formats = sh_mobile_ceu_get_formats, |
d8fac217 GL |
714 | .set_fmt = sh_mobile_ceu_set_fmt, |
715 | .try_fmt = sh_mobile_ceu_try_fmt, | |
0d3244d6 MD |
716 | .reqbufs = sh_mobile_ceu_reqbufs, |
717 | .poll = sh_mobile_ceu_poll, | |
718 | .querycap = sh_mobile_ceu_querycap, | |
0d3244d6 MD |
719 | .set_bus_param = sh_mobile_ceu_set_bus_param, |
720 | .init_videobuf = sh_mobile_ceu_init_videobuf, | |
721 | }; | |
722 | ||
723 | static int sh_mobile_ceu_probe(struct platform_device *pdev) | |
724 | { | |
725 | struct sh_mobile_ceu_dev *pcdev; | |
726 | struct resource *res; | |
727 | void __iomem *base; | |
a42b6dd6 | 728 | char clk_name[8]; |
0d3244d6 MD |
729 | unsigned int irq; |
730 | int err = 0; | |
731 | ||
732 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
733 | irq = platform_get_irq(pdev, 0); | |
734 | if (!res || !irq) { | |
735 | dev_err(&pdev->dev, "Not enough CEU platform resources.\n"); | |
736 | err = -ENODEV; | |
737 | goto exit; | |
738 | } | |
739 | ||
740 | pcdev = kzalloc(sizeof(*pcdev), GFP_KERNEL); | |
741 | if (!pcdev) { | |
742 | dev_err(&pdev->dev, "Could not allocate pcdev\n"); | |
743 | err = -ENOMEM; | |
744 | goto exit; | |
745 | } | |
746 | ||
747 | platform_set_drvdata(pdev, pcdev); | |
748 | INIT_LIST_HEAD(&pcdev->capture); | |
749 | spin_lock_init(&pcdev->lock); | |
750 | ||
751 | pcdev->pdata = pdev->dev.platform_data; | |
752 | if (!pcdev->pdata) { | |
753 | err = -EINVAL; | |
754 | dev_err(&pdev->dev, "CEU platform data not set.\n"); | |
755 | goto exit_kfree; | |
756 | } | |
757 | ||
758 | base = ioremap_nocache(res->start, res->end - res->start + 1); | |
759 | if (!base) { | |
760 | err = -ENXIO; | |
761 | dev_err(&pdev->dev, "Unable to ioremap CEU registers.\n"); | |
762 | goto exit_kfree; | |
763 | } | |
764 | ||
765 | pcdev->irq = irq; | |
766 | pcdev->base = base; | |
767 | pcdev->video_limit = 0; /* only enabled if second resource exists */ | |
768 | pcdev->dev = &pdev->dev; | |
769 | ||
770 | res = platform_get_resource(pdev, IORESOURCE_MEM, 1); | |
771 | if (res) { | |
772 | err = dma_declare_coherent_memory(&pdev->dev, res->start, | |
773 | res->start, | |
774 | (res->end - res->start) + 1, | |
775 | DMA_MEMORY_MAP | | |
776 | DMA_MEMORY_EXCLUSIVE); | |
777 | if (!err) { | |
778 | dev_err(&pdev->dev, "Unable to declare CEU memory.\n"); | |
779 | err = -ENXIO; | |
780 | goto exit_iounmap; | |
781 | } | |
782 | ||
783 | pcdev->video_limit = (res->end - res->start) + 1; | |
784 | } | |
785 | ||
786 | /* request irq */ | |
787 | err = request_irq(pcdev->irq, sh_mobile_ceu_irq, IRQF_DISABLED, | |
af128a10 | 788 | dev_name(&pdev->dev), pcdev); |
0d3244d6 MD |
789 | if (err) { |
790 | dev_err(&pdev->dev, "Unable to register CEU interrupt.\n"); | |
791 | goto exit_release_mem; | |
792 | } | |
793 | ||
a42b6dd6 MD |
794 | snprintf(clk_name, sizeof(clk_name), "ceu%d", pdev->id); |
795 | pcdev->clk = clk_get(&pdev->dev, clk_name); | |
796 | if (IS_ERR(pcdev->clk)) { | |
797 | dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name); | |
798 | err = PTR_ERR(pcdev->clk); | |
799 | goto exit_free_irq; | |
800 | } | |
801 | ||
0d3244d6 MD |
802 | pcdev->ici.priv = pcdev; |
803 | pcdev->ici.dev.parent = &pdev->dev; | |
804 | pcdev->ici.nr = pdev->id; | |
af128a10 KS |
805 | pcdev->ici.drv_name = dev_name(&pdev->dev); |
806 | pcdev->ici.ops = &sh_mobile_ceu_host_ops; | |
0d3244d6 MD |
807 | |
808 | err = soc_camera_host_register(&pcdev->ici); | |
809 | if (err) | |
a42b6dd6 | 810 | goto exit_free_clk; |
0d3244d6 MD |
811 | |
812 | return 0; | |
813 | ||
a42b6dd6 MD |
814 | exit_free_clk: |
815 | clk_put(pcdev->clk); | |
0d3244d6 MD |
816 | exit_free_irq: |
817 | free_irq(pcdev->irq, pcdev); | |
818 | exit_release_mem: | |
819 | if (platform_get_resource(pdev, IORESOURCE_MEM, 1)) | |
820 | dma_release_declared_memory(&pdev->dev); | |
821 | exit_iounmap: | |
822 | iounmap(base); | |
823 | exit_kfree: | |
824 | kfree(pcdev); | |
825 | exit: | |
826 | return err; | |
827 | } | |
828 | ||
829 | static int sh_mobile_ceu_remove(struct platform_device *pdev) | |
830 | { | |
831 | struct sh_mobile_ceu_dev *pcdev = platform_get_drvdata(pdev); | |
832 | ||
833 | soc_camera_host_unregister(&pcdev->ici); | |
a42b6dd6 | 834 | clk_put(pcdev->clk); |
0d3244d6 MD |
835 | free_irq(pcdev->irq, pcdev); |
836 | if (platform_get_resource(pdev, IORESOURCE_MEM, 1)) | |
837 | dma_release_declared_memory(&pdev->dev); | |
838 | iounmap(pcdev->base); | |
839 | kfree(pcdev); | |
840 | return 0; | |
841 | } | |
842 | ||
843 | static struct platform_driver sh_mobile_ceu_driver = { | |
844 | .driver = { | |
845 | .name = "sh_mobile_ceu", | |
846 | }, | |
847 | .probe = sh_mobile_ceu_probe, | |
848 | .remove = sh_mobile_ceu_remove, | |
849 | }; | |
850 | ||
851 | static int __init sh_mobile_ceu_init(void) | |
852 | { | |
853 | return platform_driver_register(&sh_mobile_ceu_driver); | |
854 | } | |
855 | ||
856 | static void __exit sh_mobile_ceu_exit(void) | |
857 | { | |
01c1e4ca | 858 | platform_driver_unregister(&sh_mobile_ceu_driver); |
0d3244d6 MD |
859 | } |
860 | ||
861 | module_init(sh_mobile_ceu_init); | |
862 | module_exit(sh_mobile_ceu_exit); | |
863 | ||
864 | MODULE_DESCRIPTION("SuperH Mobile CEU driver"); | |
865 | MODULE_AUTHOR("Magnus Damm"); | |
866 | MODULE_LICENSE("GPL"); |