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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> |
6acc81c3 PZ |
32 | #include <linux/time.h> |
33 | #include <linux/version.h> | |
34 | #include <linux/videodev2.h> | |
35 | ||
36 | #include <media/soc_camera.h> | |
37 | #include <media/v4l2-common.h> | |
38 | #include <media/v4l2-dev.h> | |
39 | #include <media/videobuf-dma-contig.h> | |
760697be | 40 | #include <media/soc_mediabus.h> |
6acc81c3 PZ |
41 | |
42 | #include <asm/dma.h> | |
43 | #include <asm/fiq.h> | |
44 | #include <mach/dma-mx1-mx2.h> | |
45 | #include <mach/hardware.h> | |
46 | #include <mach/mx1_camera.h> | |
47 | ||
48 | /* | |
49 | * CSI registers | |
50 | */ | |
51 | #define DMA_CCR(x) (0x8c + ((x) << 6)) /* Control Registers */ | |
52 | #define DMA_DIMR 0x08 /* Interrupt mask Register */ | |
53 | #define CSICR1 0x00 /* CSI Control Register 1 */ | |
54 | #define CSISR 0x08 /* CSI Status Register */ | |
55 | #define CSIRXR 0x10 /* CSI RxFIFO Register */ | |
56 | ||
57 | #define CSICR1_RXFF_LEVEL(x) (((x) & 0x3) << 19) | |
58 | #define CSICR1_SOF_POL (1 << 17) | |
59 | #define CSICR1_SOF_INTEN (1 << 16) | |
60 | #define CSICR1_MCLKDIV(x) (((x) & 0xf) << 12) | |
61 | #define CSICR1_MCLKEN (1 << 9) | |
62 | #define CSICR1_FCC (1 << 8) | |
63 | #define CSICR1_BIG_ENDIAN (1 << 7) | |
64 | #define CSICR1_CLR_RXFIFO (1 << 5) | |
65 | #define CSICR1_GCLK_MODE (1 << 4) | |
66 | #define CSICR1_DATA_POL (1 << 2) | |
67 | #define CSICR1_REDGE (1 << 1) | |
68 | #define CSICR1_EN (1 << 0) | |
69 | ||
70 | #define CSISR_SFF_OR_INT (1 << 25) | |
71 | #define CSISR_RFF_OR_INT (1 << 24) | |
72 | #define CSISR_STATFF_INT (1 << 21) | |
73 | #define CSISR_RXFF_INT (1 << 18) | |
74 | #define CSISR_SOF_INT (1 << 16) | |
75 | #define CSISR_DRDY (1 << 0) | |
76 | ||
77 | #define VERSION_CODE KERNEL_VERSION(0, 0, 1) | |
78 | #define DRIVER_NAME "mx1-camera" | |
79 | ||
80 | #define CSI_IRQ_MASK (CSISR_SFF_OR_INT | CSISR_RFF_OR_INT | \ | |
81 | CSISR_STATFF_INT | CSISR_RXFF_INT | CSISR_SOF_INT) | |
82 | ||
83 | #define CSI_BUS_FLAGS (SOCAM_MASTER | SOCAM_HSYNC_ACTIVE_HIGH | \ | |
84 | SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_LOW | \ | |
85 | SOCAM_PCLK_SAMPLE_RISING | SOCAM_PCLK_SAMPLE_FALLING | \ | |
86 | SOCAM_DATA_ACTIVE_HIGH | SOCAM_DATA_ACTIVE_LOW | \ | |
87 | SOCAM_DATAWIDTH_8) | |
88 | ||
89 | #define MAX_VIDEO_MEM 16 /* Video memory limit in megabytes */ | |
90 | ||
91 | /* | |
92 | * Structures | |
93 | */ | |
94 | ||
95 | /* buffer for one video frame */ | |
96 | struct mx1_buffer { | |
97 | /* common v4l buffer stuff -- must be first */ | |
760697be GL |
98 | struct videobuf_buffer vb; |
99 | enum v4l2_mbus_pixelcode code; | |
100 | int inwork; | |
6acc81c3 PZ |
101 | }; |
102 | ||
5d28d525 GL |
103 | /* |
104 | * i.MX1/i.MXL is only supposed to handle one camera on its Camera Sensor | |
6acc81c3 | 105 | * Interface. If anyone ever builds hardware to enable more than |
5d28d525 GL |
106 | * one camera, they will have to modify this driver too |
107 | */ | |
6acc81c3 | 108 | struct mx1_camera_dev { |
eb6c8558 | 109 | struct soc_camera_host soc_host; |
6acc81c3 PZ |
110 | struct soc_camera_device *icd; |
111 | struct mx1_camera_pdata *pdata; | |
112 | struct mx1_buffer *active; | |
6acc81c3 PZ |
113 | struct resource *res; |
114 | struct clk *clk; | |
115 | struct list_head capture; | |
116 | ||
117 | void __iomem *base; | |
118 | int dma_chan; | |
119 | unsigned int irq; | |
120 | unsigned long mclk; | |
121 | ||
122 | spinlock_t lock; | |
123 | }; | |
124 | ||
125 | /* | |
126 | * Videobuf operations | |
127 | */ | |
128 | static int mx1_videobuf_setup(struct videobuf_queue *vq, unsigned int *count, | |
129 | unsigned int *size) | |
130 | { | |
131 | struct soc_camera_device *icd = vq->priv_data; | |
760697be GL |
132 | int bytes_per_line = soc_mbus_bytes_per_line(icd->user_width, |
133 | icd->current_fmt->host_fmt); | |
6acc81c3 | 134 | |
760697be GL |
135 | if (bytes_per_line < 0) |
136 | return bytes_per_line; | |
137 | ||
138 | *size = bytes_per_line * icd->user_height; | |
6acc81c3 PZ |
139 | |
140 | if (!*count) | |
141 | *count = 32; | |
142 | ||
143 | while (*size * *count > MAX_VIDEO_MEM * 1024 * 1024) | |
144 | (*count)--; | |
145 | ||
0166b743 | 146 | dev_dbg(icd->dev.parent, "count=%d, size=%d\n", *count, *size); |
6acc81c3 PZ |
147 | |
148 | return 0; | |
149 | } | |
150 | ||
151 | static void free_buffer(struct videobuf_queue *vq, struct mx1_buffer *buf) | |
152 | { | |
153 | struct soc_camera_device *icd = vq->priv_data; | |
154 | struct videobuf_buffer *vb = &buf->vb; | |
155 | ||
156 | BUG_ON(in_interrupt()); | |
157 | ||
0166b743 | 158 | dev_dbg(icd->dev.parent, "%s (vb=0x%p) 0x%08lx %d\n", __func__, |
6acc81c3 PZ |
159 | vb, vb->baddr, vb->bsize); |
160 | ||
5d28d525 GL |
161 | /* |
162 | * This waits until this buffer is out of danger, i.e., until it is no | |
163 | * longer in STATE_QUEUED or STATE_ACTIVE | |
164 | */ | |
6acc81c3 PZ |
165 | videobuf_waiton(vb, 0, 0); |
166 | videobuf_dma_contig_free(vq, vb); | |
167 | ||
168 | vb->state = VIDEOBUF_NEEDS_INIT; | |
169 | } | |
170 | ||
171 | static int mx1_videobuf_prepare(struct videobuf_queue *vq, | |
172 | struct videobuf_buffer *vb, enum v4l2_field field) | |
173 | { | |
174 | struct soc_camera_device *icd = vq->priv_data; | |
175 | struct mx1_buffer *buf = container_of(vb, struct mx1_buffer, vb); | |
176 | int ret; | |
760697be GL |
177 | int bytes_per_line = soc_mbus_bytes_per_line(icd->user_width, |
178 | icd->current_fmt->host_fmt); | |
179 | ||
180 | if (bytes_per_line < 0) | |
181 | return bytes_per_line; | |
6acc81c3 | 182 | |
0166b743 | 183 | dev_dbg(icd->dev.parent, "%s (vb=0x%p) 0x%08lx %d\n", __func__, |
6acc81c3 PZ |
184 | vb, vb->baddr, vb->bsize); |
185 | ||
186 | /* Added list head initialization on alloc */ | |
187 | WARN_ON(!list_empty(&vb->queue)); | |
188 | ||
189 | BUG_ON(NULL == icd->current_fmt); | |
190 | ||
5d28d525 GL |
191 | /* |
192 | * I think, in buf_prepare you only have to protect global data, | |
193 | * the actual buffer is yours | |
194 | */ | |
6acc81c3 PZ |
195 | buf->inwork = 1; |
196 | ||
760697be | 197 | if (buf->code != icd->current_fmt->code || |
6a6c8786 GL |
198 | vb->width != icd->user_width || |
199 | vb->height != icd->user_height || | |
6acc81c3 | 200 | vb->field != field) { |
760697be | 201 | buf->code = icd->current_fmt->code; |
6a6c8786 GL |
202 | vb->width = icd->user_width; |
203 | vb->height = icd->user_height; | |
6acc81c3 PZ |
204 | vb->field = field; |
205 | vb->state = VIDEOBUF_NEEDS_INIT; | |
206 | } | |
207 | ||
760697be | 208 | vb->size = bytes_per_line * vb->height; |
6acc81c3 PZ |
209 | if (0 != vb->baddr && vb->bsize < vb->size) { |
210 | ret = -EINVAL; | |
211 | goto out; | |
212 | } | |
213 | ||
214 | if (vb->state == VIDEOBUF_NEEDS_INIT) { | |
215 | ret = videobuf_iolock(vq, vb, NULL); | |
216 | if (ret) | |
217 | goto fail; | |
218 | ||
219 | vb->state = VIDEOBUF_PREPARED; | |
220 | } | |
221 | ||
222 | buf->inwork = 0; | |
223 | ||
224 | return 0; | |
225 | ||
226 | fail: | |
227 | free_buffer(vq, buf); | |
228 | out: | |
229 | buf->inwork = 0; | |
230 | return ret; | |
231 | } | |
232 | ||
233 | static int mx1_camera_setup_dma(struct mx1_camera_dev *pcdev) | |
234 | { | |
235 | struct videobuf_buffer *vbuf = &pcdev->active->vb; | |
0166b743 | 236 | struct device *dev = pcdev->icd->dev.parent; |
6acc81c3 PZ |
237 | int ret; |
238 | ||
239 | if (unlikely(!pcdev->active)) { | |
0166b743 | 240 | dev_err(dev, "DMA End IRQ with no active buffer\n"); |
6acc81c3 PZ |
241 | return -EFAULT; |
242 | } | |
243 | ||
244 | /* setup sg list for future DMA */ | |
245 | ret = imx_dma_setup_single(pcdev->dma_chan, | |
246 | videobuf_to_dma_contig(vbuf), | |
247 | vbuf->size, pcdev->res->start + | |
248 | CSIRXR, DMA_MODE_READ); | |
249 | if (unlikely(ret)) | |
0166b743 | 250 | dev_err(dev, "Failed to setup DMA sg list\n"); |
6acc81c3 PZ |
251 | |
252 | return ret; | |
253 | } | |
254 | ||
2dd54a54 | 255 | /* Called under spinlock_irqsave(&pcdev->lock, ...) */ |
6acc81c3 PZ |
256 | static void mx1_videobuf_queue(struct videobuf_queue *vq, |
257 | struct videobuf_buffer *vb) | |
258 | { | |
259 | struct soc_camera_device *icd = vq->priv_data; | |
260 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
261 | struct mx1_camera_dev *pcdev = ici->priv; | |
262 | struct mx1_buffer *buf = container_of(vb, struct mx1_buffer, vb); | |
6acc81c3 | 263 | |
0166b743 | 264 | dev_dbg(icd->dev.parent, "%s (vb=0x%p) 0x%08lx %d\n", __func__, |
6acc81c3 PZ |
265 | vb, vb->baddr, vb->bsize); |
266 | ||
6acc81c3 PZ |
267 | list_add_tail(&vb->queue, &pcdev->capture); |
268 | ||
269 | vb->state = VIDEOBUF_ACTIVE; | |
270 | ||
271 | if (!pcdev->active) { | |
272 | pcdev->active = buf; | |
273 | ||
274 | /* setup sg list for future DMA */ | |
275 | if (!mx1_camera_setup_dma(pcdev)) { | |
276 | unsigned int temp; | |
277 | /* enable SOF irq */ | |
278 | temp = __raw_readl(pcdev->base + CSICR1) | | |
279 | CSICR1_SOF_INTEN; | |
280 | __raw_writel(temp, pcdev->base + CSICR1); | |
281 | } | |
282 | } | |
6acc81c3 PZ |
283 | } |
284 | ||
285 | static void mx1_videobuf_release(struct videobuf_queue *vq, | |
286 | struct videobuf_buffer *vb) | |
287 | { | |
288 | struct mx1_buffer *buf = container_of(vb, struct mx1_buffer, vb); | |
289 | #ifdef DEBUG | |
290 | struct soc_camera_device *icd = vq->priv_data; | |
0166b743 | 291 | struct device *dev = icd->dev.parent; |
6acc81c3 | 292 | |
0166b743 | 293 | dev_dbg(dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__, |
6acc81c3 PZ |
294 | vb, vb->baddr, vb->bsize); |
295 | ||
296 | switch (vb->state) { | |
297 | case VIDEOBUF_ACTIVE: | |
0166b743 | 298 | dev_dbg(dev, "%s (active)\n", __func__); |
6acc81c3 PZ |
299 | break; |
300 | case VIDEOBUF_QUEUED: | |
0166b743 | 301 | dev_dbg(dev, "%s (queued)\n", __func__); |
6acc81c3 PZ |
302 | break; |
303 | case VIDEOBUF_PREPARED: | |
0166b743 | 304 | dev_dbg(dev, "%s (prepared)\n", __func__); |
6acc81c3 PZ |
305 | break; |
306 | default: | |
0166b743 | 307 | dev_dbg(dev, "%s (unknown)\n", __func__); |
6acc81c3 PZ |
308 | break; |
309 | } | |
310 | #endif | |
311 | ||
312 | free_buffer(vq, buf); | |
313 | } | |
314 | ||
315 | static void mx1_camera_wakeup(struct mx1_camera_dev *pcdev, | |
316 | struct videobuf_buffer *vb, | |
317 | struct mx1_buffer *buf) | |
318 | { | |
319 | /* _init is used to debug races, see comment in mx1_camera_reqbufs() */ | |
320 | list_del_init(&vb->queue); | |
321 | vb->state = VIDEOBUF_DONE; | |
322 | do_gettimeofday(&vb->ts); | |
323 | vb->field_count++; | |
324 | wake_up(&vb->done); | |
325 | ||
326 | if (list_empty(&pcdev->capture)) { | |
327 | pcdev->active = NULL; | |
328 | return; | |
329 | } | |
330 | ||
331 | pcdev->active = list_entry(pcdev->capture.next, | |
332 | struct mx1_buffer, vb.queue); | |
333 | ||
334 | /* setup sg list for future DMA */ | |
335 | if (likely(!mx1_camera_setup_dma(pcdev))) { | |
336 | unsigned int temp; | |
337 | ||
338 | /* enable SOF irq */ | |
339 | temp = __raw_readl(pcdev->base + CSICR1) | CSICR1_SOF_INTEN; | |
340 | __raw_writel(temp, pcdev->base + CSICR1); | |
341 | } | |
342 | } | |
343 | ||
344 | static void mx1_camera_dma_irq(int channel, void *data) | |
345 | { | |
346 | struct mx1_camera_dev *pcdev = data; | |
0166b743 | 347 | struct device *dev = pcdev->icd->dev.parent; |
6acc81c3 PZ |
348 | struct mx1_buffer *buf; |
349 | struct videobuf_buffer *vb; | |
350 | unsigned long flags; | |
351 | ||
352 | spin_lock_irqsave(&pcdev->lock, flags); | |
353 | ||
354 | imx_dma_disable(channel); | |
355 | ||
356 | if (unlikely(!pcdev->active)) { | |
0166b743 | 357 | dev_err(dev, "DMA End IRQ with no active buffer\n"); |
6acc81c3 PZ |
358 | goto out; |
359 | } | |
360 | ||
361 | vb = &pcdev->active->vb; | |
362 | buf = container_of(vb, struct mx1_buffer, vb); | |
363 | WARN_ON(buf->inwork || list_empty(&vb->queue)); | |
0166b743 | 364 | dev_dbg(dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__, |
6acc81c3 PZ |
365 | vb, vb->baddr, vb->bsize); |
366 | ||
367 | mx1_camera_wakeup(pcdev, vb, buf); | |
368 | out: | |
369 | spin_unlock_irqrestore(&pcdev->lock, flags); | |
370 | } | |
371 | ||
372 | static struct videobuf_queue_ops mx1_videobuf_ops = { | |
373 | .buf_setup = mx1_videobuf_setup, | |
374 | .buf_prepare = mx1_videobuf_prepare, | |
375 | .buf_queue = mx1_videobuf_queue, | |
376 | .buf_release = mx1_videobuf_release, | |
377 | }; | |
378 | ||
379 | static void mx1_camera_init_videobuf(struct videobuf_queue *q, | |
380 | struct soc_camera_device *icd) | |
381 | { | |
382 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
383 | struct mx1_camera_dev *pcdev = ici->priv; | |
384 | ||
979ea1dd | 385 | videobuf_queue_dma_contig_init(q, &mx1_videobuf_ops, icd->dev.parent, |
6acc81c3 PZ |
386 | &pcdev->lock, |
387 | V4L2_BUF_TYPE_VIDEO_CAPTURE, | |
388 | V4L2_FIELD_NONE, | |
389 | sizeof(struct mx1_buffer), icd); | |
390 | } | |
391 | ||
392 | static int mclk_get_divisor(struct mx1_camera_dev *pcdev) | |
393 | { | |
394 | unsigned int mclk = pcdev->mclk; | |
395 | unsigned long div; | |
396 | unsigned long lcdclk; | |
397 | ||
398 | lcdclk = clk_get_rate(pcdev->clk); | |
399 | ||
5d28d525 GL |
400 | /* |
401 | * We verify platform_mclk_10khz != 0, so if anyone breaks it, here | |
402 | * they get a nice Oops | |
403 | */ | |
6acc81c3 PZ |
404 | div = (lcdclk + 2 * mclk - 1) / (2 * mclk) - 1; |
405 | ||
0166b743 GL |
406 | dev_dbg(pcdev->icd->dev.parent, |
407 | "System clock %lukHz, target freq %dkHz, divisor %lu\n", | |
408 | lcdclk / 1000, mclk / 1000, div); | |
6acc81c3 PZ |
409 | |
410 | return div; | |
411 | } | |
412 | ||
413 | static void mx1_camera_activate(struct mx1_camera_dev *pcdev) | |
414 | { | |
415 | unsigned int csicr1 = CSICR1_EN; | |
416 | ||
979ea1dd | 417 | dev_dbg(pcdev->icd->dev.parent, "Activate device\n"); |
6acc81c3 PZ |
418 | |
419 | clk_enable(pcdev->clk); | |
420 | ||
421 | /* enable CSI before doing anything else */ | |
422 | __raw_writel(csicr1, pcdev->base + CSICR1); | |
423 | ||
424 | csicr1 |= CSICR1_MCLKEN | CSICR1_FCC | CSICR1_GCLK_MODE; | |
425 | csicr1 |= CSICR1_MCLKDIV(mclk_get_divisor(pcdev)); | |
426 | csicr1 |= CSICR1_RXFF_LEVEL(2); /* 16 words */ | |
427 | ||
428 | __raw_writel(csicr1, pcdev->base + CSICR1); | |
429 | } | |
430 | ||
431 | static void mx1_camera_deactivate(struct mx1_camera_dev *pcdev) | |
432 | { | |
979ea1dd | 433 | dev_dbg(pcdev->icd->dev.parent, "Deactivate device\n"); |
6acc81c3 PZ |
434 | |
435 | /* Disable all CSI interface */ | |
436 | __raw_writel(0x00, pcdev->base + CSICR1); | |
437 | ||
438 | clk_disable(pcdev->clk); | |
439 | } | |
440 | ||
5d28d525 GL |
441 | /* |
442 | * The following two functions absolutely depend on the fact, that | |
443 | * there can be only one camera on i.MX1/i.MXL camera sensor interface | |
444 | */ | |
6acc81c3 PZ |
445 | static int mx1_camera_add_device(struct soc_camera_device *icd) |
446 | { | |
447 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
448 | struct mx1_camera_dev *pcdev = ici->priv; | |
449 | int ret; | |
450 | ||
451 | if (pcdev->icd) { | |
452 | ret = -EBUSY; | |
453 | goto ebusy; | |
454 | } | |
455 | ||
0166b743 | 456 | dev_info(icd->dev.parent, "MX1 Camera driver attached to camera %d\n", |
6acc81c3 PZ |
457 | icd->devnum); |
458 | ||
459 | mx1_camera_activate(pcdev); | |
6acc81c3 | 460 | |
979ea1dd | 461 | pcdev->icd = icd; |
6acc81c3 PZ |
462 | |
463 | ebusy: | |
464 | return ret; | |
465 | } | |
466 | ||
467 | static void mx1_camera_remove_device(struct soc_camera_device *icd) | |
468 | { | |
469 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
470 | struct mx1_camera_dev *pcdev = ici->priv; | |
471 | unsigned int csicr1; | |
472 | ||
473 | BUG_ON(icd != pcdev->icd); | |
474 | ||
475 | /* disable interrupts */ | |
476 | csicr1 = __raw_readl(pcdev->base + CSICR1) & ~CSI_IRQ_MASK; | |
477 | __raw_writel(csicr1, pcdev->base + CSICR1); | |
478 | ||
479 | /* Stop DMA engine */ | |
480 | imx_dma_disable(pcdev->dma_chan); | |
481 | ||
0166b743 | 482 | dev_info(icd->dev.parent, "MX1 Camera driver detached from camera %d\n", |
6acc81c3 PZ |
483 | icd->devnum); |
484 | ||
6acc81c3 PZ |
485 | mx1_camera_deactivate(pcdev); |
486 | ||
487 | pcdev->icd = NULL; | |
488 | } | |
489 | ||
490 | static int mx1_camera_set_crop(struct soc_camera_device *icd, | |
08590b96 | 491 | struct v4l2_crop *a) |
6acc81c3 | 492 | { |
c9c1f1c0 | 493 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
08590b96 GL |
494 | |
495 | return v4l2_subdev_call(sd, video, s_crop, a); | |
6acc81c3 PZ |
496 | } |
497 | ||
498 | static int mx1_camera_set_bus_param(struct soc_camera_device *icd, __u32 pixfmt) | |
499 | { | |
500 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
501 | struct mx1_camera_dev *pcdev = ici->priv; | |
502 | unsigned long camera_flags, common_flags; | |
503 | unsigned int csicr1; | |
504 | int ret; | |
505 | ||
506 | camera_flags = icd->ops->query_bus_param(icd); | |
507 | ||
508 | /* MX1 supports only 8bit buswidth */ | |
509 | common_flags = soc_camera_bus_param_compatible(camera_flags, | |
760697be | 510 | CSI_BUS_FLAGS); |
6acc81c3 PZ |
511 | if (!common_flags) |
512 | return -EINVAL; | |
513 | ||
6acc81c3 PZ |
514 | /* Make choises, based on platform choice */ |
515 | if ((common_flags & SOCAM_VSYNC_ACTIVE_HIGH) && | |
516 | (common_flags & SOCAM_VSYNC_ACTIVE_LOW)) { | |
517 | if (!pcdev->pdata || | |
518 | pcdev->pdata->flags & MX1_CAMERA_VSYNC_HIGH) | |
519 | common_flags &= ~SOCAM_VSYNC_ACTIVE_LOW; | |
520 | else | |
521 | common_flags &= ~SOCAM_VSYNC_ACTIVE_HIGH; | |
522 | } | |
523 | ||
524 | if ((common_flags & SOCAM_PCLK_SAMPLE_RISING) && | |
525 | (common_flags & SOCAM_PCLK_SAMPLE_FALLING)) { | |
526 | if (!pcdev->pdata || | |
527 | pcdev->pdata->flags & MX1_CAMERA_PCLK_RISING) | |
528 | common_flags &= ~SOCAM_PCLK_SAMPLE_FALLING; | |
529 | else | |
530 | common_flags &= ~SOCAM_PCLK_SAMPLE_RISING; | |
531 | } | |
532 | ||
533 | if ((common_flags & SOCAM_DATA_ACTIVE_HIGH) && | |
534 | (common_flags & SOCAM_DATA_ACTIVE_LOW)) { | |
535 | if (!pcdev->pdata || | |
536 | pcdev->pdata->flags & MX1_CAMERA_DATA_HIGH) | |
537 | common_flags &= ~SOCAM_DATA_ACTIVE_LOW; | |
538 | else | |
539 | common_flags &= ~SOCAM_DATA_ACTIVE_HIGH; | |
540 | } | |
541 | ||
542 | ret = icd->ops->set_bus_param(icd, common_flags); | |
543 | if (ret < 0) | |
544 | return ret; | |
545 | ||
546 | csicr1 = __raw_readl(pcdev->base + CSICR1); | |
547 | ||
548 | if (common_flags & SOCAM_PCLK_SAMPLE_RISING) | |
549 | csicr1 |= CSICR1_REDGE; | |
550 | if (common_flags & SOCAM_VSYNC_ACTIVE_HIGH) | |
551 | csicr1 |= CSICR1_SOF_POL; | |
552 | if (common_flags & SOCAM_DATA_ACTIVE_LOW) | |
553 | csicr1 |= CSICR1_DATA_POL; | |
554 | ||
555 | __raw_writel(csicr1, pcdev->base + CSICR1); | |
556 | ||
557 | return 0; | |
558 | } | |
559 | ||
560 | static int mx1_camera_set_fmt(struct soc_camera_device *icd, | |
561 | struct v4l2_format *f) | |
562 | { | |
c9c1f1c0 | 563 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
6acc81c3 PZ |
564 | const struct soc_camera_format_xlate *xlate; |
565 | struct v4l2_pix_format *pix = &f->fmt.pix; | |
760697be GL |
566 | struct v4l2_mbus_framefmt mf; |
567 | int ret, buswidth; | |
6acc81c3 PZ |
568 | |
569 | xlate = soc_camera_xlate_by_fourcc(icd, pix->pixelformat); | |
570 | if (!xlate) { | |
96c75399 GL |
571 | dev_warn(icd->dev.parent, "Format %x not found\n", |
572 | pix->pixelformat); | |
6acc81c3 PZ |
573 | return -EINVAL; |
574 | } | |
575 | ||
760697be GL |
576 | buswidth = xlate->host_fmt->bits_per_sample; |
577 | if (buswidth > 8) { | |
578 | dev_warn(icd->dev.parent, | |
579 | "bits-per-sample %d for format %x unsupported\n", | |
580 | buswidth, pix->pixelformat); | |
581 | return -EINVAL; | |
6acc81c3 PZ |
582 | } |
583 | ||
760697be GL |
584 | mf.width = pix->width; |
585 | mf.height = pix->height; | |
586 | mf.field = pix->field; | |
587 | mf.colorspace = pix->colorspace; | |
588 | mf.code = xlate->code; | |
589 | ||
590 | ret = v4l2_subdev_call(sd, video, s_mbus_fmt, &mf); | |
591 | if (ret < 0) | |
592 | return ret; | |
593 | ||
594 | if (mf.code != xlate->code) | |
595 | return -EINVAL; | |
596 | ||
597 | pix->width = mf.width; | |
598 | pix->height = mf.height; | |
599 | pix->field = mf.field; | |
600 | pix->colorspace = mf.colorspace; | |
601 | icd->current_fmt = xlate; | |
602 | ||
6acc81c3 PZ |
603 | return ret; |
604 | } | |
605 | ||
606 | static int mx1_camera_try_fmt(struct soc_camera_device *icd, | |
607 | struct v4l2_format *f) | |
608 | { | |
c9c1f1c0 | 609 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
760697be GL |
610 | const struct soc_camera_format_xlate *xlate; |
611 | struct v4l2_pix_format *pix = &f->fmt.pix; | |
612 | struct v4l2_mbus_framefmt mf; | |
613 | int ret; | |
6acc81c3 PZ |
614 | /* TODO: limit to mx1 hardware capabilities */ |
615 | ||
760697be GL |
616 | xlate = soc_camera_xlate_by_fourcc(icd, pix->pixelformat); |
617 | if (!xlate) { | |
618 | dev_warn(icd->dev.parent, "Format %x not found\n", | |
619 | pix->pixelformat); | |
620 | return -EINVAL; | |
621 | } | |
622 | ||
623 | mf.width = pix->width; | |
624 | mf.height = pix->height; | |
625 | mf.field = pix->field; | |
626 | mf.colorspace = pix->colorspace; | |
627 | mf.code = xlate->code; | |
628 | ||
6acc81c3 | 629 | /* limit to sensor capabilities */ |
760697be GL |
630 | ret = v4l2_subdev_call(sd, video, try_mbus_fmt, &mf); |
631 | if (ret < 0) | |
632 | return ret; | |
633 | ||
634 | pix->width = mf.width; | |
635 | pix->height = mf.height; | |
636 | pix->field = mf.field; | |
637 | pix->colorspace = mf.colorspace; | |
638 | ||
639 | return 0; | |
6acc81c3 PZ |
640 | } |
641 | ||
642 | static int mx1_camera_reqbufs(struct soc_camera_file *icf, | |
643 | struct v4l2_requestbuffers *p) | |
644 | { | |
645 | int i; | |
646 | ||
5d28d525 GL |
647 | /* |
648 | * This is for locking debugging only. I removed spinlocks and now I | |
6acc81c3 PZ |
649 | * check whether .prepare is ever called on a linked buffer, or whether |
650 | * a dma IRQ can occur for an in-work or unlinked buffer. Until now | |
5d28d525 GL |
651 | * it hadn't triggered |
652 | */ | |
6acc81c3 PZ |
653 | for (i = 0; i < p->count; i++) { |
654 | struct mx1_buffer *buf = container_of(icf->vb_vidq.bufs[i], | |
655 | struct mx1_buffer, vb); | |
656 | buf->inwork = 0; | |
657 | INIT_LIST_HEAD(&buf->vb.queue); | |
658 | } | |
659 | ||
660 | return 0; | |
661 | } | |
662 | ||
663 | static unsigned int mx1_camera_poll(struct file *file, poll_table *pt) | |
664 | { | |
665 | struct soc_camera_file *icf = file->private_data; | |
666 | struct mx1_buffer *buf; | |
667 | ||
668 | buf = list_entry(icf->vb_vidq.stream.next, struct mx1_buffer, | |
669 | vb.stream); | |
670 | ||
671 | poll_wait(file, &buf->vb.done, pt); | |
672 | ||
673 | if (buf->vb.state == VIDEOBUF_DONE || | |
674 | buf->vb.state == VIDEOBUF_ERROR) | |
675 | return POLLIN | POLLRDNORM; | |
676 | ||
677 | return 0; | |
678 | } | |
679 | ||
680 | static int mx1_camera_querycap(struct soc_camera_host *ici, | |
681 | struct v4l2_capability *cap) | |
682 | { | |
683 | /* cap->name is set by the friendly caller:-> */ | |
684 | strlcpy(cap->card, "i.MX1/i.MXL Camera", sizeof(cap->card)); | |
685 | cap->version = VERSION_CODE; | |
686 | cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; | |
687 | ||
688 | return 0; | |
689 | } | |
690 | ||
691 | static struct soc_camera_host_ops mx1_soc_camera_host_ops = { | |
692 | .owner = THIS_MODULE, | |
693 | .add = mx1_camera_add_device, | |
694 | .remove = mx1_camera_remove_device, | |
695 | .set_bus_param = mx1_camera_set_bus_param, | |
696 | .set_crop = mx1_camera_set_crop, | |
697 | .set_fmt = mx1_camera_set_fmt, | |
698 | .try_fmt = mx1_camera_try_fmt, | |
699 | .init_videobuf = mx1_camera_init_videobuf, | |
700 | .reqbufs = mx1_camera_reqbufs, | |
701 | .poll = mx1_camera_poll, | |
702 | .querycap = mx1_camera_querycap, | |
703 | }; | |
704 | ||
6acc81c3 PZ |
705 | static struct fiq_handler fh = { |
706 | .name = "csi_sof" | |
707 | }; | |
708 | ||
709 | static int __init mx1_camera_probe(struct platform_device *pdev) | |
710 | { | |
711 | struct mx1_camera_dev *pcdev; | |
712 | struct resource *res; | |
713 | struct pt_regs regs; | |
714 | struct clk *clk; | |
715 | void __iomem *base; | |
716 | unsigned int irq; | |
717 | int err = 0; | |
718 | ||
719 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
720 | irq = platform_get_irq(pdev, 0); | |
721 | if (!res || !irq) { | |
722 | err = -ENODEV; | |
723 | goto exit; | |
724 | } | |
725 | ||
726 | clk = clk_get(&pdev->dev, "csi_clk"); | |
727 | if (IS_ERR(clk)) { | |
728 | err = PTR_ERR(clk); | |
729 | goto exit; | |
730 | } | |
731 | ||
732 | pcdev = kzalloc(sizeof(*pcdev), GFP_KERNEL); | |
733 | if (!pcdev) { | |
734 | dev_err(&pdev->dev, "Could not allocate pcdev\n"); | |
735 | err = -ENOMEM; | |
736 | goto exit_put_clk; | |
737 | } | |
738 | ||
6acc81c3 PZ |
739 | pcdev->res = res; |
740 | pcdev->clk = clk; | |
741 | ||
742 | pcdev->pdata = pdev->dev.platform_data; | |
743 | ||
744 | if (pcdev->pdata) | |
745 | pcdev->mclk = pcdev->pdata->mclk_10khz * 10000; | |
746 | ||
747 | if (!pcdev->mclk) { | |
748 | dev_warn(&pdev->dev, | |
749 | "mclk_10khz == 0! Please, fix your platform data. " | |
750 | "Using default 20MHz\n"); | |
751 | pcdev->mclk = 20000000; | |
752 | } | |
753 | ||
754 | INIT_LIST_HEAD(&pcdev->capture); | |
755 | spin_lock_init(&pcdev->lock); | |
756 | ||
757 | /* | |
758 | * Request the regions. | |
759 | */ | |
760 | if (!request_mem_region(res->start, resource_size(res), DRIVER_NAME)) { | |
761 | err = -EBUSY; | |
762 | goto exit_kfree; | |
763 | } | |
764 | ||
765 | base = ioremap(res->start, resource_size(res)); | |
766 | if (!base) { | |
767 | err = -ENOMEM; | |
768 | goto exit_release; | |
769 | } | |
770 | pcdev->irq = irq; | |
771 | pcdev->base = base; | |
6acc81c3 PZ |
772 | |
773 | /* request dma */ | |
774 | pcdev->dma_chan = imx_dma_request_by_prio(DRIVER_NAME, DMA_PRIO_HIGH); | |
775 | if (pcdev->dma_chan < 0) { | |
eff505fa | 776 | dev_err(&pdev->dev, "Can't request DMA for MX1 CSI\n"); |
6acc81c3 PZ |
777 | err = -EBUSY; |
778 | goto exit_iounmap; | |
779 | } | |
eff505fa | 780 | dev_dbg(&pdev->dev, "got DMA channel %d\n", pcdev->dma_chan); |
6acc81c3 PZ |
781 | |
782 | imx_dma_setup_handlers(pcdev->dma_chan, mx1_camera_dma_irq, NULL, | |
783 | pcdev); | |
784 | ||
785 | imx_dma_config_channel(pcdev->dma_chan, IMX_DMA_TYPE_FIFO, | |
786 | IMX_DMA_MEMSIZE_32, DMA_REQ_CSI_R, 0); | |
787 | /* burst length : 16 words = 64 bytes */ | |
788 | imx_dma_config_burstlen(pcdev->dma_chan, 0); | |
789 | ||
790 | /* request irq */ | |
791 | err = claim_fiq(&fh); | |
792 | if (err) { | |
eff505fa | 793 | dev_err(&pdev->dev, "Camera interrupt register failed \n"); |
6acc81c3 PZ |
794 | goto exit_free_dma; |
795 | } | |
796 | ||
797 | set_fiq_handler(&mx1_camera_sof_fiq_start, &mx1_camera_sof_fiq_end - | |
798 | &mx1_camera_sof_fiq_start); | |
799 | ||
800 | regs.ARM_r8 = DMA_BASE + DMA_DIMR; | |
801 | regs.ARM_r9 = DMA_BASE + DMA_CCR(pcdev->dma_chan); | |
802 | regs.ARM_r10 = (long)pcdev->base + CSICR1; | |
803 | regs.ARM_fp = (long)pcdev->base + CSISR; | |
804 | regs.ARM_sp = 1 << pcdev->dma_chan; | |
805 | set_fiq_regs(®s); | |
806 | ||
807 | mxc_set_irq_fiq(irq, 1); | |
808 | enable_fiq(irq); | |
809 | ||
eb6c8558 GL |
810 | pcdev->soc_host.drv_name = DRIVER_NAME; |
811 | pcdev->soc_host.ops = &mx1_soc_camera_host_ops; | |
812 | pcdev->soc_host.priv = pcdev; | |
979ea1dd | 813 | pcdev->soc_host.v4l2_dev.dev = &pdev->dev; |
eb6c8558 GL |
814 | pcdev->soc_host.nr = pdev->id; |
815 | err = soc_camera_host_register(&pcdev->soc_host); | |
6acc81c3 PZ |
816 | if (err) |
817 | goto exit_free_irq; | |
818 | ||
819 | dev_info(&pdev->dev, "MX1 Camera driver loaded\n"); | |
820 | ||
821 | return 0; | |
822 | ||
823 | exit_free_irq: | |
824 | disable_fiq(irq); | |
825 | mxc_set_irq_fiq(irq, 0); | |
826 | release_fiq(&fh); | |
827 | exit_free_dma: | |
828 | imx_dma_free(pcdev->dma_chan); | |
829 | exit_iounmap: | |
830 | iounmap(base); | |
831 | exit_release: | |
832 | release_mem_region(res->start, resource_size(res)); | |
833 | exit_kfree: | |
834 | kfree(pcdev); | |
835 | exit_put_clk: | |
836 | clk_put(clk); | |
837 | exit: | |
838 | return err; | |
839 | } | |
840 | ||
841 | static int __exit mx1_camera_remove(struct platform_device *pdev) | |
842 | { | |
eff505fa GL |
843 | struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev); |
844 | struct mx1_camera_dev *pcdev = container_of(soc_host, | |
845 | struct mx1_camera_dev, soc_host); | |
6acc81c3 PZ |
846 | struct resource *res; |
847 | ||
848 | imx_dma_free(pcdev->dma_chan); | |
849 | disable_fiq(pcdev->irq); | |
850 | mxc_set_irq_fiq(pcdev->irq, 0); | |
851 | release_fiq(&fh); | |
852 | ||
853 | clk_put(pcdev->clk); | |
854 | ||
eff505fa | 855 | soc_camera_host_unregister(soc_host); |
6acc81c3 PZ |
856 | |
857 | iounmap(pcdev->base); | |
858 | ||
859 | res = pcdev->res; | |
860 | release_mem_region(res->start, resource_size(res)); | |
861 | ||
862 | kfree(pcdev); | |
863 | ||
864 | dev_info(&pdev->dev, "MX1 Camera driver unloaded\n"); | |
865 | ||
866 | return 0; | |
867 | } | |
868 | ||
869 | static struct platform_driver mx1_camera_driver = { | |
870 | .driver = { | |
871 | .name = DRIVER_NAME, | |
872 | }, | |
873 | .remove = __exit_p(mx1_camera_remove), | |
874 | }; | |
875 | ||
876 | static int __init mx1_camera_init(void) | |
877 | { | |
878 | return platform_driver_probe(&mx1_camera_driver, mx1_camera_probe); | |
879 | } | |
880 | ||
881 | static void __exit mx1_camera_exit(void) | |
882 | { | |
883 | return platform_driver_unregister(&mx1_camera_driver); | |
884 | } | |
885 | ||
886 | module_init(mx1_camera_init); | |
887 | module_exit(mx1_camera_exit); | |
888 | ||
889 | MODULE_DESCRIPTION("i.MX1/i.MXL SoC Camera Host driver"); | |
890 | MODULE_AUTHOR("Paulius Zaleckas <paulius.zaleckas@teltonika.lt>"); | |
891 | MODULE_LICENSE("GPL v2"); | |
892 | MODULE_ALIAS("platform:" DRIVER_NAME); |