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Commit | Line | Data |
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6acc81c3 PZ |
1 | /* |
2 | * V4L2 Driver for i.MXL/i.MXL camera (CSI) host | |
3 | * | |
4 | * Copyright (C) 2008, Paulius Zaleckas <paulius.zaleckas@teltonika.lt> | |
5 | * Copyright (C) 2009, Darius Augulis <augulis.darius@gmail.com> | |
6 | * | |
7 | * Based on PXA SoC camera driver | |
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 version 2 as | |
13 | * published by the Free Software Foundation. | |
14 | */ | |
15 | ||
16 | #include <linux/clk.h> | |
17 | #include <linux/delay.h> | |
18 | #include <linux/device.h> | |
19 | #include <linux/dma-mapping.h> | |
20 | #include <linux/errno.h> | |
21 | #include <linux/fs.h> | |
22 | #include <linux/init.h> | |
23 | #include <linux/interrupt.h> | |
24 | #include <linux/io.h> | |
25 | #include <linux/kernel.h> | |
26 | #include <linux/mm.h> | |
27 | #include <linux/module.h> | |
28 | #include <linux/moduleparam.h> | |
29 | #include <linux/mutex.h> | |
30 | #include <linux/platform_device.h> | |
f39c1ab3 | 31 | #include <linux/sched.h> |
5a0e3ad6 | 32 | #include <linux/slab.h> |
6acc81c3 PZ |
33 | #include <linux/time.h> |
34 | #include <linux/version.h> | |
35 | #include <linux/videodev2.h> | |
36 | ||
37 | #include <media/soc_camera.h> | |
38 | #include <media/v4l2-common.h> | |
39 | #include <media/v4l2-dev.h> | |
40 | #include <media/videobuf-dma-contig.h> | |
760697be | 41 | #include <media/soc_mediabus.h> |
6acc81c3 PZ |
42 | |
43 | #include <asm/dma.h> | |
44 | #include <asm/fiq.h> | |
45 | #include <mach/dma-mx1-mx2.h> | |
46 | #include <mach/hardware.h> | |
47 | #include <mach/mx1_camera.h> | |
48 | ||
49 | /* | |
50 | * CSI registers | |
51 | */ | |
6acc81c3 PZ |
52 | #define CSICR1 0x00 /* CSI Control Register 1 */ |
53 | #define CSISR 0x08 /* CSI Status Register */ | |
54 | #define CSIRXR 0x10 /* CSI RxFIFO Register */ | |
55 | ||
56 | #define CSICR1_RXFF_LEVEL(x) (((x) & 0x3) << 19) | |
57 | #define CSICR1_SOF_POL (1 << 17) | |
58 | #define CSICR1_SOF_INTEN (1 << 16) | |
59 | #define CSICR1_MCLKDIV(x) (((x) & 0xf) << 12) | |
60 | #define CSICR1_MCLKEN (1 << 9) | |
61 | #define CSICR1_FCC (1 << 8) | |
62 | #define CSICR1_BIG_ENDIAN (1 << 7) | |
63 | #define CSICR1_CLR_RXFIFO (1 << 5) | |
64 | #define CSICR1_GCLK_MODE (1 << 4) | |
65 | #define CSICR1_DATA_POL (1 << 2) | |
66 | #define CSICR1_REDGE (1 << 1) | |
67 | #define CSICR1_EN (1 << 0) | |
68 | ||
69 | #define CSISR_SFF_OR_INT (1 << 25) | |
70 | #define CSISR_RFF_OR_INT (1 << 24) | |
71 | #define CSISR_STATFF_INT (1 << 21) | |
72 | #define CSISR_RXFF_INT (1 << 18) | |
73 | #define CSISR_SOF_INT (1 << 16) | |
74 | #define CSISR_DRDY (1 << 0) | |
75 | ||
76 | #define VERSION_CODE KERNEL_VERSION(0, 0, 1) | |
77 | #define DRIVER_NAME "mx1-camera" | |
78 | ||
79 | #define CSI_IRQ_MASK (CSISR_SFF_OR_INT | CSISR_RFF_OR_INT | \ | |
80 | CSISR_STATFF_INT | CSISR_RXFF_INT | CSISR_SOF_INT) | |
81 | ||
82 | #define CSI_BUS_FLAGS (SOCAM_MASTER | SOCAM_HSYNC_ACTIVE_HIGH | \ | |
83 | SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_LOW | \ | |
84 | SOCAM_PCLK_SAMPLE_RISING | SOCAM_PCLK_SAMPLE_FALLING | \ | |
85 | SOCAM_DATA_ACTIVE_HIGH | SOCAM_DATA_ACTIVE_LOW | \ | |
86 | SOCAM_DATAWIDTH_8) | |
87 | ||
88 | #define MAX_VIDEO_MEM 16 /* Video memory limit in megabytes */ | |
89 | ||
90 | /* | |
91 | * Structures | |
92 | */ | |
93 | ||
94 | /* buffer for one video frame */ | |
95 | struct mx1_buffer { | |
96 | /* common v4l buffer stuff -- must be first */ | |
760697be GL |
97 | struct videobuf_buffer vb; |
98 | enum v4l2_mbus_pixelcode code; | |
99 | int inwork; | |
6acc81c3 PZ |
100 | }; |
101 | ||
5d28d525 GL |
102 | /* |
103 | * i.MX1/i.MXL is only supposed to handle one camera on its Camera Sensor | |
6acc81c3 | 104 | * Interface. If anyone ever builds hardware to enable more than |
5d28d525 GL |
105 | * one camera, they will have to modify this driver too |
106 | */ | |
6acc81c3 | 107 | struct mx1_camera_dev { |
eb6c8558 | 108 | struct soc_camera_host soc_host; |
6acc81c3 PZ |
109 | struct soc_camera_device *icd; |
110 | struct mx1_camera_pdata *pdata; | |
111 | struct mx1_buffer *active; | |
6acc81c3 PZ |
112 | struct resource *res; |
113 | struct clk *clk; | |
114 | struct list_head capture; | |
115 | ||
116 | void __iomem *base; | |
117 | int dma_chan; | |
118 | unsigned int irq; | |
119 | unsigned long mclk; | |
120 | ||
121 | spinlock_t lock; | |
122 | }; | |
123 | ||
124 | /* | |
125 | * Videobuf operations | |
126 | */ | |
127 | static int mx1_videobuf_setup(struct videobuf_queue *vq, unsigned int *count, | |
128 | unsigned int *size) | |
129 | { | |
130 | struct soc_camera_device *icd = vq->priv_data; | |
760697be GL |
131 | int bytes_per_line = soc_mbus_bytes_per_line(icd->user_width, |
132 | icd->current_fmt->host_fmt); | |
6acc81c3 | 133 | |
760697be GL |
134 | if (bytes_per_line < 0) |
135 | return bytes_per_line; | |
136 | ||
137 | *size = bytes_per_line * icd->user_height; | |
6acc81c3 PZ |
138 | |
139 | if (!*count) | |
140 | *count = 32; | |
141 | ||
dab7e310 AB |
142 | if (*size * *count > MAX_VIDEO_MEM * 1024 * 1024) |
143 | *count = (MAX_VIDEO_MEM * 1024 * 1024) / *size; | |
6acc81c3 | 144 | |
0166b743 | 145 | dev_dbg(icd->dev.parent, "count=%d, size=%d\n", *count, *size); |
6acc81c3 PZ |
146 | |
147 | return 0; | |
148 | } | |
149 | ||
150 | static void free_buffer(struct videobuf_queue *vq, struct mx1_buffer *buf) | |
151 | { | |
152 | struct soc_camera_device *icd = vq->priv_data; | |
153 | struct videobuf_buffer *vb = &buf->vb; | |
154 | ||
155 | BUG_ON(in_interrupt()); | |
156 | ||
0166b743 | 157 | dev_dbg(icd->dev.parent, "%s (vb=0x%p) 0x%08lx %d\n", __func__, |
6acc81c3 PZ |
158 | vb, vb->baddr, vb->bsize); |
159 | ||
5d28d525 GL |
160 | /* |
161 | * This waits until this buffer is out of danger, i.e., until it is no | |
162 | * longer in STATE_QUEUED or STATE_ACTIVE | |
163 | */ | |
0e0809a5 | 164 | videobuf_waiton(vq, vb, 0, 0); |
6acc81c3 PZ |
165 | videobuf_dma_contig_free(vq, vb); |
166 | ||
167 | vb->state = VIDEOBUF_NEEDS_INIT; | |
168 | } | |
169 | ||
170 | static int mx1_videobuf_prepare(struct videobuf_queue *vq, | |
171 | struct videobuf_buffer *vb, enum v4l2_field field) | |
172 | { | |
173 | struct soc_camera_device *icd = vq->priv_data; | |
174 | struct mx1_buffer *buf = container_of(vb, struct mx1_buffer, vb); | |
175 | int ret; | |
760697be GL |
176 | int bytes_per_line = soc_mbus_bytes_per_line(icd->user_width, |
177 | icd->current_fmt->host_fmt); | |
178 | ||
179 | if (bytes_per_line < 0) | |
180 | return bytes_per_line; | |
6acc81c3 | 181 | |
0166b743 | 182 | dev_dbg(icd->dev.parent, "%s (vb=0x%p) 0x%08lx %d\n", __func__, |
6acc81c3 PZ |
183 | vb, vb->baddr, vb->bsize); |
184 | ||
185 | /* Added list head initialization on alloc */ | |
186 | WARN_ON(!list_empty(&vb->queue)); | |
187 | ||
188 | BUG_ON(NULL == icd->current_fmt); | |
189 | ||
5d28d525 GL |
190 | /* |
191 | * I think, in buf_prepare you only have to protect global data, | |
192 | * the actual buffer is yours | |
193 | */ | |
6acc81c3 PZ |
194 | buf->inwork = 1; |
195 | ||
760697be | 196 | if (buf->code != icd->current_fmt->code || |
6a6c8786 GL |
197 | vb->width != icd->user_width || |
198 | vb->height != icd->user_height || | |
6acc81c3 | 199 | vb->field != field) { |
760697be | 200 | buf->code = icd->current_fmt->code; |
6a6c8786 GL |
201 | vb->width = icd->user_width; |
202 | vb->height = icd->user_height; | |
6acc81c3 PZ |
203 | vb->field = field; |
204 | vb->state = VIDEOBUF_NEEDS_INIT; | |
205 | } | |
206 | ||
760697be | 207 | vb->size = bytes_per_line * vb->height; |
6acc81c3 PZ |
208 | if (0 != vb->baddr && vb->bsize < vb->size) { |
209 | ret = -EINVAL; | |
210 | goto out; | |
211 | } | |
212 | ||
213 | if (vb->state == VIDEOBUF_NEEDS_INIT) { | |
214 | ret = videobuf_iolock(vq, vb, NULL); | |
215 | if (ret) | |
216 | goto fail; | |
217 | ||
218 | vb->state = VIDEOBUF_PREPARED; | |
219 | } | |
220 | ||
221 | buf->inwork = 0; | |
222 | ||
223 | return 0; | |
224 | ||
225 | fail: | |
226 | free_buffer(vq, buf); | |
227 | out: | |
228 | buf->inwork = 0; | |
229 | return ret; | |
230 | } | |
231 | ||
232 | static int mx1_camera_setup_dma(struct mx1_camera_dev *pcdev) | |
233 | { | |
234 | struct videobuf_buffer *vbuf = &pcdev->active->vb; | |
0166b743 | 235 | struct device *dev = pcdev->icd->dev.parent; |
6acc81c3 PZ |
236 | int ret; |
237 | ||
238 | if (unlikely(!pcdev->active)) { | |
0166b743 | 239 | dev_err(dev, "DMA End IRQ with no active buffer\n"); |
6acc81c3 PZ |
240 | return -EFAULT; |
241 | } | |
242 | ||
243 | /* setup sg list for future DMA */ | |
244 | ret = imx_dma_setup_single(pcdev->dma_chan, | |
245 | videobuf_to_dma_contig(vbuf), | |
246 | vbuf->size, pcdev->res->start + | |
247 | CSIRXR, DMA_MODE_READ); | |
248 | if (unlikely(ret)) | |
0166b743 | 249 | dev_err(dev, "Failed to setup DMA sg list\n"); |
6acc81c3 PZ |
250 | |
251 | return ret; | |
252 | } | |
253 | ||
2dd54a54 | 254 | /* Called under spinlock_irqsave(&pcdev->lock, ...) */ |
6acc81c3 PZ |
255 | static void mx1_videobuf_queue(struct videobuf_queue *vq, |
256 | struct videobuf_buffer *vb) | |
257 | { | |
258 | struct soc_camera_device *icd = vq->priv_data; | |
259 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
260 | struct mx1_camera_dev *pcdev = ici->priv; | |
261 | struct mx1_buffer *buf = container_of(vb, struct mx1_buffer, vb); | |
6acc81c3 | 262 | |
0166b743 | 263 | dev_dbg(icd->dev.parent, "%s (vb=0x%p) 0x%08lx %d\n", __func__, |
6acc81c3 PZ |
264 | vb, vb->baddr, vb->bsize); |
265 | ||
6acc81c3 PZ |
266 | list_add_tail(&vb->queue, &pcdev->capture); |
267 | ||
268 | vb->state = VIDEOBUF_ACTIVE; | |
269 | ||
270 | if (!pcdev->active) { | |
271 | pcdev->active = buf; | |
272 | ||
273 | /* setup sg list for future DMA */ | |
274 | if (!mx1_camera_setup_dma(pcdev)) { | |
275 | unsigned int temp; | |
276 | /* enable SOF irq */ | |
277 | temp = __raw_readl(pcdev->base + CSICR1) | | |
278 | CSICR1_SOF_INTEN; | |
279 | __raw_writel(temp, pcdev->base + CSICR1); | |
280 | } | |
281 | } | |
6acc81c3 PZ |
282 | } |
283 | ||
284 | static void mx1_videobuf_release(struct videobuf_queue *vq, | |
285 | struct videobuf_buffer *vb) | |
286 | { | |
287 | struct mx1_buffer *buf = container_of(vb, struct mx1_buffer, vb); | |
288 | #ifdef DEBUG | |
289 | struct soc_camera_device *icd = vq->priv_data; | |
0166b743 | 290 | struct device *dev = icd->dev.parent; |
6acc81c3 | 291 | |
0166b743 | 292 | dev_dbg(dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__, |
6acc81c3 PZ |
293 | vb, vb->baddr, vb->bsize); |
294 | ||
295 | switch (vb->state) { | |
296 | case VIDEOBUF_ACTIVE: | |
0166b743 | 297 | dev_dbg(dev, "%s (active)\n", __func__); |
6acc81c3 PZ |
298 | break; |
299 | case VIDEOBUF_QUEUED: | |
0166b743 | 300 | dev_dbg(dev, "%s (queued)\n", __func__); |
6acc81c3 PZ |
301 | break; |
302 | case VIDEOBUF_PREPARED: | |
0166b743 | 303 | dev_dbg(dev, "%s (prepared)\n", __func__); |
6acc81c3 PZ |
304 | break; |
305 | default: | |
0166b743 | 306 | dev_dbg(dev, "%s (unknown)\n", __func__); |
6acc81c3 PZ |
307 | break; |
308 | } | |
309 | #endif | |
310 | ||
311 | free_buffer(vq, buf); | |
312 | } | |
313 | ||
314 | static void mx1_camera_wakeup(struct mx1_camera_dev *pcdev, | |
315 | struct videobuf_buffer *vb, | |
316 | struct mx1_buffer *buf) | |
317 | { | |
318 | /* _init is used to debug races, see comment in mx1_camera_reqbufs() */ | |
319 | list_del_init(&vb->queue); | |
320 | vb->state = VIDEOBUF_DONE; | |
321 | do_gettimeofday(&vb->ts); | |
322 | vb->field_count++; | |
323 | wake_up(&vb->done); | |
324 | ||
325 | if (list_empty(&pcdev->capture)) { | |
326 | pcdev->active = NULL; | |
327 | return; | |
328 | } | |
329 | ||
330 | pcdev->active = list_entry(pcdev->capture.next, | |
331 | struct mx1_buffer, vb.queue); | |
332 | ||
333 | /* setup sg list for future DMA */ | |
334 | if (likely(!mx1_camera_setup_dma(pcdev))) { | |
335 | unsigned int temp; | |
336 | ||
337 | /* enable SOF irq */ | |
338 | temp = __raw_readl(pcdev->base + CSICR1) | CSICR1_SOF_INTEN; | |
339 | __raw_writel(temp, pcdev->base + CSICR1); | |
340 | } | |
341 | } | |
342 | ||
343 | static void mx1_camera_dma_irq(int channel, void *data) | |
344 | { | |
345 | struct mx1_camera_dev *pcdev = data; | |
0166b743 | 346 | struct device *dev = pcdev->icd->dev.parent; |
6acc81c3 PZ |
347 | struct mx1_buffer *buf; |
348 | struct videobuf_buffer *vb; | |
349 | unsigned long flags; | |
350 | ||
351 | spin_lock_irqsave(&pcdev->lock, flags); | |
352 | ||
353 | imx_dma_disable(channel); | |
354 | ||
355 | if (unlikely(!pcdev->active)) { | |
0166b743 | 356 | dev_err(dev, "DMA End IRQ with no active buffer\n"); |
6acc81c3 PZ |
357 | goto out; |
358 | } | |
359 | ||
360 | vb = &pcdev->active->vb; | |
361 | buf = container_of(vb, struct mx1_buffer, vb); | |
362 | WARN_ON(buf->inwork || list_empty(&vb->queue)); | |
0166b743 | 363 | dev_dbg(dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__, |
6acc81c3 PZ |
364 | vb, vb->baddr, vb->bsize); |
365 | ||
366 | mx1_camera_wakeup(pcdev, vb, buf); | |
367 | out: | |
368 | spin_unlock_irqrestore(&pcdev->lock, flags); | |
369 | } | |
370 | ||
371 | static struct videobuf_queue_ops mx1_videobuf_ops = { | |
372 | .buf_setup = mx1_videobuf_setup, | |
373 | .buf_prepare = mx1_videobuf_prepare, | |
374 | .buf_queue = mx1_videobuf_queue, | |
375 | .buf_release = mx1_videobuf_release, | |
376 | }; | |
377 | ||
378 | static void mx1_camera_init_videobuf(struct videobuf_queue *q, | |
379 | struct soc_camera_device *icd) | |
380 | { | |
381 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
382 | struct mx1_camera_dev *pcdev = ici->priv; | |
383 | ||
979ea1dd | 384 | videobuf_queue_dma_contig_init(q, &mx1_videobuf_ops, icd->dev.parent, |
6acc81c3 PZ |
385 | &pcdev->lock, |
386 | V4L2_BUF_TYPE_VIDEO_CAPTURE, | |
387 | V4L2_FIELD_NONE, | |
e3cfd447 | 388 | sizeof(struct mx1_buffer), icd, NULL); |
6acc81c3 PZ |
389 | } |
390 | ||
391 | static int mclk_get_divisor(struct mx1_camera_dev *pcdev) | |
392 | { | |
393 | unsigned int mclk = pcdev->mclk; | |
394 | unsigned long div; | |
395 | unsigned long lcdclk; | |
396 | ||
397 | lcdclk = clk_get_rate(pcdev->clk); | |
398 | ||
5d28d525 GL |
399 | /* |
400 | * We verify platform_mclk_10khz != 0, so if anyone breaks it, here | |
401 | * they get a nice Oops | |
402 | */ | |
6acc81c3 PZ |
403 | div = (lcdclk + 2 * mclk - 1) / (2 * mclk) - 1; |
404 | ||
0166b743 GL |
405 | dev_dbg(pcdev->icd->dev.parent, |
406 | "System clock %lukHz, target freq %dkHz, divisor %lu\n", | |
407 | lcdclk / 1000, mclk / 1000, div); | |
6acc81c3 PZ |
408 | |
409 | return div; | |
410 | } | |
411 | ||
412 | static void mx1_camera_activate(struct mx1_camera_dev *pcdev) | |
413 | { | |
414 | unsigned int csicr1 = CSICR1_EN; | |
415 | ||
979ea1dd | 416 | dev_dbg(pcdev->icd->dev.parent, "Activate device\n"); |
6acc81c3 PZ |
417 | |
418 | clk_enable(pcdev->clk); | |
419 | ||
420 | /* enable CSI before doing anything else */ | |
421 | __raw_writel(csicr1, pcdev->base + CSICR1); | |
422 | ||
423 | csicr1 |= CSICR1_MCLKEN | CSICR1_FCC | CSICR1_GCLK_MODE; | |
424 | csicr1 |= CSICR1_MCLKDIV(mclk_get_divisor(pcdev)); | |
425 | csicr1 |= CSICR1_RXFF_LEVEL(2); /* 16 words */ | |
426 | ||
427 | __raw_writel(csicr1, pcdev->base + CSICR1); | |
428 | } | |
429 | ||
430 | static void mx1_camera_deactivate(struct mx1_camera_dev *pcdev) | |
431 | { | |
979ea1dd | 432 | dev_dbg(pcdev->icd->dev.parent, "Deactivate device\n"); |
6acc81c3 PZ |
433 | |
434 | /* Disable all CSI interface */ | |
435 | __raw_writel(0x00, pcdev->base + CSICR1); | |
436 | ||
437 | clk_disable(pcdev->clk); | |
438 | } | |
439 | ||
5d28d525 GL |
440 | /* |
441 | * The following two functions absolutely depend on the fact, that | |
442 | * there can be only one camera on i.MX1/i.MXL camera sensor interface | |
443 | */ | |
6acc81c3 PZ |
444 | static int mx1_camera_add_device(struct soc_camera_device *icd) |
445 | { | |
446 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
447 | struct mx1_camera_dev *pcdev = ici->priv; | |
448 | int ret; | |
449 | ||
450 | if (pcdev->icd) { | |
451 | ret = -EBUSY; | |
452 | goto ebusy; | |
453 | } | |
454 | ||
0166b743 | 455 | dev_info(icd->dev.parent, "MX1 Camera driver attached to camera %d\n", |
6acc81c3 PZ |
456 | icd->devnum); |
457 | ||
458 | mx1_camera_activate(pcdev); | |
6acc81c3 | 459 | |
979ea1dd | 460 | pcdev->icd = icd; |
6acc81c3 PZ |
461 | |
462 | ebusy: | |
463 | return ret; | |
464 | } | |
465 | ||
466 | static void mx1_camera_remove_device(struct soc_camera_device *icd) | |
467 | { | |
468 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
469 | struct mx1_camera_dev *pcdev = ici->priv; | |
470 | unsigned int csicr1; | |
471 | ||
472 | BUG_ON(icd != pcdev->icd); | |
473 | ||
474 | /* disable interrupts */ | |
475 | csicr1 = __raw_readl(pcdev->base + CSICR1) & ~CSI_IRQ_MASK; | |
476 | __raw_writel(csicr1, pcdev->base + CSICR1); | |
477 | ||
478 | /* Stop DMA engine */ | |
479 | imx_dma_disable(pcdev->dma_chan); | |
480 | ||
0166b743 | 481 | dev_info(icd->dev.parent, "MX1 Camera driver detached from camera %d\n", |
6acc81c3 PZ |
482 | icd->devnum); |
483 | ||
6acc81c3 PZ |
484 | mx1_camera_deactivate(pcdev); |
485 | ||
486 | pcdev->icd = NULL; | |
487 | } | |
488 | ||
489 | static int mx1_camera_set_crop(struct soc_camera_device *icd, | |
08590b96 | 490 | struct v4l2_crop *a) |
6acc81c3 | 491 | { |
c9c1f1c0 | 492 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
08590b96 GL |
493 | |
494 | return v4l2_subdev_call(sd, video, s_crop, a); | |
6acc81c3 PZ |
495 | } |
496 | ||
497 | static int mx1_camera_set_bus_param(struct soc_camera_device *icd, __u32 pixfmt) | |
498 | { | |
499 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
500 | struct mx1_camera_dev *pcdev = ici->priv; | |
501 | unsigned long camera_flags, common_flags; | |
502 | unsigned int csicr1; | |
503 | int ret; | |
504 | ||
505 | camera_flags = icd->ops->query_bus_param(icd); | |
506 | ||
507 | /* MX1 supports only 8bit buswidth */ | |
508 | common_flags = soc_camera_bus_param_compatible(camera_flags, | |
760697be | 509 | CSI_BUS_FLAGS); |
6acc81c3 PZ |
510 | if (!common_flags) |
511 | return -EINVAL; | |
512 | ||
6acc81c3 PZ |
513 | /* Make choises, based on platform choice */ |
514 | if ((common_flags & SOCAM_VSYNC_ACTIVE_HIGH) && | |
515 | (common_flags & SOCAM_VSYNC_ACTIVE_LOW)) { | |
516 | if (!pcdev->pdata || | |
517 | pcdev->pdata->flags & MX1_CAMERA_VSYNC_HIGH) | |
518 | common_flags &= ~SOCAM_VSYNC_ACTIVE_LOW; | |
519 | else | |
520 | common_flags &= ~SOCAM_VSYNC_ACTIVE_HIGH; | |
521 | } | |
522 | ||
523 | if ((common_flags & SOCAM_PCLK_SAMPLE_RISING) && | |
524 | (common_flags & SOCAM_PCLK_SAMPLE_FALLING)) { | |
525 | if (!pcdev->pdata || | |
526 | pcdev->pdata->flags & MX1_CAMERA_PCLK_RISING) | |
527 | common_flags &= ~SOCAM_PCLK_SAMPLE_FALLING; | |
528 | else | |
529 | common_flags &= ~SOCAM_PCLK_SAMPLE_RISING; | |
530 | } | |
531 | ||
532 | if ((common_flags & SOCAM_DATA_ACTIVE_HIGH) && | |
533 | (common_flags & SOCAM_DATA_ACTIVE_LOW)) { | |
534 | if (!pcdev->pdata || | |
535 | pcdev->pdata->flags & MX1_CAMERA_DATA_HIGH) | |
536 | common_flags &= ~SOCAM_DATA_ACTIVE_LOW; | |
537 | else | |
538 | common_flags &= ~SOCAM_DATA_ACTIVE_HIGH; | |
539 | } | |
540 | ||
541 | ret = icd->ops->set_bus_param(icd, common_flags); | |
542 | if (ret < 0) | |
543 | return ret; | |
544 | ||
545 | csicr1 = __raw_readl(pcdev->base + CSICR1); | |
546 | ||
547 | if (common_flags & SOCAM_PCLK_SAMPLE_RISING) | |
548 | csicr1 |= CSICR1_REDGE; | |
549 | if (common_flags & SOCAM_VSYNC_ACTIVE_HIGH) | |
550 | csicr1 |= CSICR1_SOF_POL; | |
551 | if (common_flags & SOCAM_DATA_ACTIVE_LOW) | |
552 | csicr1 |= CSICR1_DATA_POL; | |
553 | ||
554 | __raw_writel(csicr1, pcdev->base + CSICR1); | |
555 | ||
556 | return 0; | |
557 | } | |
558 | ||
559 | static int mx1_camera_set_fmt(struct soc_camera_device *icd, | |
560 | struct v4l2_format *f) | |
561 | { | |
c9c1f1c0 | 562 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
6acc81c3 PZ |
563 | const struct soc_camera_format_xlate *xlate; |
564 | struct v4l2_pix_format *pix = &f->fmt.pix; | |
760697be GL |
565 | struct v4l2_mbus_framefmt mf; |
566 | int ret, buswidth; | |
6acc81c3 PZ |
567 | |
568 | xlate = soc_camera_xlate_by_fourcc(icd, pix->pixelformat); | |
569 | if (!xlate) { | |
96c75399 GL |
570 | dev_warn(icd->dev.parent, "Format %x not found\n", |
571 | pix->pixelformat); | |
6acc81c3 PZ |
572 | return -EINVAL; |
573 | } | |
574 | ||
760697be GL |
575 | buswidth = xlate->host_fmt->bits_per_sample; |
576 | if (buswidth > 8) { | |
577 | dev_warn(icd->dev.parent, | |
578 | "bits-per-sample %d for format %x unsupported\n", | |
579 | buswidth, pix->pixelformat); | |
580 | return -EINVAL; | |
6acc81c3 PZ |
581 | } |
582 | ||
760697be GL |
583 | mf.width = pix->width; |
584 | mf.height = pix->height; | |
585 | mf.field = pix->field; | |
586 | mf.colorspace = pix->colorspace; | |
587 | mf.code = xlate->code; | |
588 | ||
589 | ret = v4l2_subdev_call(sd, video, s_mbus_fmt, &mf); | |
590 | if (ret < 0) | |
591 | return ret; | |
592 | ||
593 | if (mf.code != xlate->code) | |
594 | return -EINVAL; | |
595 | ||
596 | pix->width = mf.width; | |
597 | pix->height = mf.height; | |
598 | pix->field = mf.field; | |
599 | pix->colorspace = mf.colorspace; | |
600 | icd->current_fmt = xlate; | |
601 | ||
6acc81c3 PZ |
602 | return ret; |
603 | } | |
604 | ||
605 | static int mx1_camera_try_fmt(struct soc_camera_device *icd, | |
606 | struct v4l2_format *f) | |
607 | { | |
c9c1f1c0 | 608 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
760697be GL |
609 | const struct soc_camera_format_xlate *xlate; |
610 | struct v4l2_pix_format *pix = &f->fmt.pix; | |
611 | struct v4l2_mbus_framefmt mf; | |
612 | int ret; | |
6acc81c3 PZ |
613 | /* TODO: limit to mx1 hardware capabilities */ |
614 | ||
760697be GL |
615 | xlate = soc_camera_xlate_by_fourcc(icd, pix->pixelformat); |
616 | if (!xlate) { | |
617 | dev_warn(icd->dev.parent, "Format %x not found\n", | |
618 | pix->pixelformat); | |
619 | return -EINVAL; | |
620 | } | |
621 | ||
622 | mf.width = pix->width; | |
623 | mf.height = pix->height; | |
624 | mf.field = pix->field; | |
625 | mf.colorspace = pix->colorspace; | |
626 | mf.code = xlate->code; | |
627 | ||
6acc81c3 | 628 | /* limit to sensor capabilities */ |
760697be GL |
629 | ret = v4l2_subdev_call(sd, video, try_mbus_fmt, &mf); |
630 | if (ret < 0) | |
631 | return ret; | |
632 | ||
633 | pix->width = mf.width; | |
634 | pix->height = mf.height; | |
635 | pix->field = mf.field; | |
636 | pix->colorspace = mf.colorspace; | |
637 | ||
638 | return 0; | |
6acc81c3 PZ |
639 | } |
640 | ||
57bee29d | 641 | static int mx1_camera_reqbufs(struct soc_camera_device *icd, |
6acc81c3 PZ |
642 | struct v4l2_requestbuffers *p) |
643 | { | |
644 | int i; | |
645 | ||
5d28d525 GL |
646 | /* |
647 | * This is for locking debugging only. I removed spinlocks and now I | |
6acc81c3 PZ |
648 | * check whether .prepare is ever called on a linked buffer, or whether |
649 | * a dma IRQ can occur for an in-work or unlinked buffer. Until now | |
5d28d525 GL |
650 | * it hadn't triggered |
651 | */ | |
6acc81c3 | 652 | for (i = 0; i < p->count; i++) { |
57bee29d | 653 | struct mx1_buffer *buf = container_of(icd->vb_vidq.bufs[i], |
6acc81c3 PZ |
654 | struct mx1_buffer, vb); |
655 | buf->inwork = 0; | |
656 | INIT_LIST_HEAD(&buf->vb.queue); | |
657 | } | |
658 | ||
659 | return 0; | |
660 | } | |
661 | ||
662 | static unsigned int mx1_camera_poll(struct file *file, poll_table *pt) | |
663 | { | |
57bee29d | 664 | struct soc_camera_device *icd = file->private_data; |
6acc81c3 PZ |
665 | struct mx1_buffer *buf; |
666 | ||
57bee29d | 667 | buf = list_entry(icd->vb_vidq.stream.next, struct mx1_buffer, |
6acc81c3 PZ |
668 | vb.stream); |
669 | ||
670 | poll_wait(file, &buf->vb.done, pt); | |
671 | ||
672 | if (buf->vb.state == VIDEOBUF_DONE || | |
673 | buf->vb.state == VIDEOBUF_ERROR) | |
674 | return POLLIN | POLLRDNORM; | |
675 | ||
676 | return 0; | |
677 | } | |
678 | ||
679 | static int mx1_camera_querycap(struct soc_camera_host *ici, | |
680 | struct v4l2_capability *cap) | |
681 | { | |
682 | /* cap->name is set by the friendly caller:-> */ | |
683 | strlcpy(cap->card, "i.MX1/i.MXL Camera", sizeof(cap->card)); | |
684 | cap->version = VERSION_CODE; | |
685 | cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; | |
686 | ||
687 | return 0; | |
688 | } | |
689 | ||
690 | static struct soc_camera_host_ops mx1_soc_camera_host_ops = { | |
691 | .owner = THIS_MODULE, | |
692 | .add = mx1_camera_add_device, | |
693 | .remove = mx1_camera_remove_device, | |
694 | .set_bus_param = mx1_camera_set_bus_param, | |
695 | .set_crop = mx1_camera_set_crop, | |
696 | .set_fmt = mx1_camera_set_fmt, | |
697 | .try_fmt = mx1_camera_try_fmt, | |
698 | .init_videobuf = mx1_camera_init_videobuf, | |
699 | .reqbufs = mx1_camera_reqbufs, | |
700 | .poll = mx1_camera_poll, | |
701 | .querycap = mx1_camera_querycap, | |
702 | }; | |
703 | ||
6acc81c3 PZ |
704 | static struct fiq_handler fh = { |
705 | .name = "csi_sof" | |
706 | }; | |
707 | ||
708 | static int __init mx1_camera_probe(struct platform_device *pdev) | |
709 | { | |
710 | struct mx1_camera_dev *pcdev; | |
711 | struct resource *res; | |
712 | struct pt_regs regs; | |
713 | struct clk *clk; | |
714 | void __iomem *base; | |
715 | unsigned int irq; | |
716 | int err = 0; | |
717 | ||
718 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
719 | irq = platform_get_irq(pdev, 0); | |
30883ea8 | 720 | if (!res || (int)irq <= 0) { |
6acc81c3 PZ |
721 | err = -ENODEV; |
722 | goto exit; | |
723 | } | |
724 | ||
725 | clk = clk_get(&pdev->dev, "csi_clk"); | |
726 | if (IS_ERR(clk)) { | |
727 | err = PTR_ERR(clk); | |
728 | goto exit; | |
729 | } | |
730 | ||
731 | pcdev = kzalloc(sizeof(*pcdev), GFP_KERNEL); | |
732 | if (!pcdev) { | |
733 | dev_err(&pdev->dev, "Could not allocate pcdev\n"); | |
734 | err = -ENOMEM; | |
735 | goto exit_put_clk; | |
736 | } | |
737 | ||
6acc81c3 PZ |
738 | pcdev->res = res; |
739 | pcdev->clk = clk; | |
740 | ||
741 | pcdev->pdata = pdev->dev.platform_data; | |
742 | ||
743 | if (pcdev->pdata) | |
744 | pcdev->mclk = pcdev->pdata->mclk_10khz * 10000; | |
745 | ||
746 | if (!pcdev->mclk) { | |
747 | dev_warn(&pdev->dev, | |
748 | "mclk_10khz == 0! Please, fix your platform data. " | |
749 | "Using default 20MHz\n"); | |
750 | pcdev->mclk = 20000000; | |
751 | } | |
752 | ||
753 | INIT_LIST_HEAD(&pcdev->capture); | |
754 | spin_lock_init(&pcdev->lock); | |
755 | ||
756 | /* | |
757 | * Request the regions. | |
758 | */ | |
759 | if (!request_mem_region(res->start, resource_size(res), DRIVER_NAME)) { | |
760 | err = -EBUSY; | |
761 | goto exit_kfree; | |
762 | } | |
763 | ||
764 | base = ioremap(res->start, resource_size(res)); | |
765 | if (!base) { | |
766 | err = -ENOMEM; | |
767 | goto exit_release; | |
768 | } | |
769 | pcdev->irq = irq; | |
770 | pcdev->base = base; | |
6acc81c3 PZ |
771 | |
772 | /* request dma */ | |
773 | pcdev->dma_chan = imx_dma_request_by_prio(DRIVER_NAME, DMA_PRIO_HIGH); | |
774 | if (pcdev->dma_chan < 0) { | |
eff505fa | 775 | dev_err(&pdev->dev, "Can't request DMA for MX1 CSI\n"); |
6acc81c3 PZ |
776 | err = -EBUSY; |
777 | goto exit_iounmap; | |
778 | } | |
eff505fa | 779 | dev_dbg(&pdev->dev, "got DMA channel %d\n", pcdev->dma_chan); |
6acc81c3 PZ |
780 | |
781 | imx_dma_setup_handlers(pcdev->dma_chan, mx1_camera_dma_irq, NULL, | |
782 | pcdev); | |
783 | ||
784 | imx_dma_config_channel(pcdev->dma_chan, IMX_DMA_TYPE_FIFO, | |
b7d41d6d | 785 | IMX_DMA_MEMSIZE_32, MX1_DMA_REQ_CSI_R, 0); |
6acc81c3 PZ |
786 | /* burst length : 16 words = 64 bytes */ |
787 | imx_dma_config_burstlen(pcdev->dma_chan, 0); | |
788 | ||
789 | /* request irq */ | |
790 | err = claim_fiq(&fh); | |
791 | if (err) { | |
eff505fa | 792 | dev_err(&pdev->dev, "Camera interrupt register failed \n"); |
6acc81c3 PZ |
793 | goto exit_free_dma; |
794 | } | |
795 | ||
796 | set_fiq_handler(&mx1_camera_sof_fiq_start, &mx1_camera_sof_fiq_end - | |
797 | &mx1_camera_sof_fiq_start); | |
798 | ||
b7d41d6d UKK |
799 | regs.ARM_r8 = (long)MX1_DMA_DIMR; |
800 | regs.ARM_r9 = (long)MX1_DMA_CCR(pcdev->dma_chan); | |
6acc81c3 PZ |
801 | regs.ARM_r10 = (long)pcdev->base + CSICR1; |
802 | regs.ARM_fp = (long)pcdev->base + CSISR; | |
803 | regs.ARM_sp = 1 << pcdev->dma_chan; | |
804 | set_fiq_regs(®s); | |
805 | ||
806 | mxc_set_irq_fiq(irq, 1); | |
807 | enable_fiq(irq); | |
808 | ||
eb6c8558 GL |
809 | pcdev->soc_host.drv_name = DRIVER_NAME; |
810 | pcdev->soc_host.ops = &mx1_soc_camera_host_ops; | |
811 | pcdev->soc_host.priv = pcdev; | |
979ea1dd | 812 | pcdev->soc_host.v4l2_dev.dev = &pdev->dev; |
eb6c8558 GL |
813 | pcdev->soc_host.nr = pdev->id; |
814 | err = soc_camera_host_register(&pcdev->soc_host); | |
6acc81c3 PZ |
815 | if (err) |
816 | goto exit_free_irq; | |
817 | ||
818 | dev_info(&pdev->dev, "MX1 Camera driver loaded\n"); | |
819 | ||
820 | return 0; | |
821 | ||
822 | exit_free_irq: | |
823 | disable_fiq(irq); | |
824 | mxc_set_irq_fiq(irq, 0); | |
825 | release_fiq(&fh); | |
826 | exit_free_dma: | |
827 | imx_dma_free(pcdev->dma_chan); | |
828 | exit_iounmap: | |
829 | iounmap(base); | |
830 | exit_release: | |
831 | release_mem_region(res->start, resource_size(res)); | |
832 | exit_kfree: | |
833 | kfree(pcdev); | |
834 | exit_put_clk: | |
835 | clk_put(clk); | |
836 | exit: | |
837 | return err; | |
838 | } | |
839 | ||
840 | static int __exit mx1_camera_remove(struct platform_device *pdev) | |
841 | { | |
eff505fa GL |
842 | struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev); |
843 | struct mx1_camera_dev *pcdev = container_of(soc_host, | |
844 | struct mx1_camera_dev, soc_host); | |
6acc81c3 PZ |
845 | struct resource *res; |
846 | ||
847 | imx_dma_free(pcdev->dma_chan); | |
848 | disable_fiq(pcdev->irq); | |
849 | mxc_set_irq_fiq(pcdev->irq, 0); | |
850 | release_fiq(&fh); | |
851 | ||
852 | clk_put(pcdev->clk); | |
853 | ||
eff505fa | 854 | soc_camera_host_unregister(soc_host); |
6acc81c3 PZ |
855 | |
856 | iounmap(pcdev->base); | |
857 | ||
858 | res = pcdev->res; | |
859 | release_mem_region(res->start, resource_size(res)); | |
860 | ||
861 | kfree(pcdev); | |
862 | ||
863 | dev_info(&pdev->dev, "MX1 Camera driver unloaded\n"); | |
864 | ||
865 | return 0; | |
866 | } | |
867 | ||
868 | static struct platform_driver mx1_camera_driver = { | |
869 | .driver = { | |
870 | .name = DRIVER_NAME, | |
871 | }, | |
872 | .remove = __exit_p(mx1_camera_remove), | |
873 | }; | |
874 | ||
875 | static int __init mx1_camera_init(void) | |
876 | { | |
877 | return platform_driver_probe(&mx1_camera_driver, mx1_camera_probe); | |
878 | } | |
879 | ||
880 | static void __exit mx1_camera_exit(void) | |
881 | { | |
882 | return platform_driver_unregister(&mx1_camera_driver); | |
883 | } | |
884 | ||
885 | module_init(mx1_camera_init); | |
886 | module_exit(mx1_camera_exit); | |
887 | ||
888 | MODULE_DESCRIPTION("i.MX1/i.MXL SoC Camera Host driver"); | |
889 | MODULE_AUTHOR("Paulius Zaleckas <paulius.zaleckas@teltonika.lt>"); | |
890 | MODULE_LICENSE("GPL v2"); | |
891 | MODULE_ALIAS("platform:" DRIVER_NAME); |