diff options
Diffstat (limited to 'drivers/media/video')
-rw-r--r-- | drivers/media/video/Kconfig | 13 | ||||
-rw-r--r-- | drivers/media/video/Makefile | 1 | ||||
-rw-r--r-- | drivers/media/video/mx1_camera.c | 827 |
3 files changed, 840 insertions, 1 deletions
diff --git a/drivers/media/video/Kconfig b/drivers/media/video/Kconfig index 76bad5819592..159229fc838d 100644 --- a/drivers/media/video/Kconfig +++ b/drivers/media/video/Kconfig | |||
@@ -746,6 +746,18 @@ config SOC_CAMERA_OV772X | |||
746 | help | 746 | help |
747 | This is a ov772x camera driver | 747 | This is a ov772x camera driver |
748 | 748 | ||
749 | config MX1_VIDEO | ||
750 | bool | ||
751 | |||
752 | config VIDEO_MX1 | ||
753 | tristate "i.MX1/i.MXL CMOS Sensor Interface driver" | ||
754 | depends on VIDEO_DEV && ARCH_MX1 && SOC_CAMERA | ||
755 | select FIQ | ||
756 | select VIDEOBUF_DMA_CONTIG | ||
757 | select MX1_VIDEO | ||
758 | ---help--- | ||
759 | This is a v4l2 driver for the i.MX1/i.MXL CMOS Sensor Interface | ||
760 | |||
749 | config VIDEO_MX3 | 761 | config VIDEO_MX3 |
750 | tristate "i.MX3x Camera Sensor Interface driver" | 762 | tristate "i.MX3x Camera Sensor Interface driver" |
751 | depends on VIDEO_DEV && MX3_IPU && SOC_CAMERA | 763 | depends on VIDEO_DEV && MX3_IPU && SOC_CAMERA |
@@ -904,5 +916,4 @@ config USB_S2255 | |||
904 | This driver can be compiled as a module, called s2255drv. | 916 | This driver can be compiled as a module, called s2255drv. |
905 | 917 | ||
906 | endif # V4L_USB_DRIVERS | 918 | endif # V4L_USB_DRIVERS |
907 | |||
908 | endif # VIDEO_CAPTURE_DRIVERS | 919 | endif # VIDEO_CAPTURE_DRIVERS |
diff --git a/drivers/media/video/Makefile b/drivers/media/video/Makefile index b9046744463b..ba02977adf10 100644 --- a/drivers/media/video/Makefile +++ b/drivers/media/video/Makefile | |||
@@ -133,6 +133,7 @@ obj-$(CONFIG_VIDEO_CX18) += cx18/ | |||
133 | obj-$(CONFIG_VIDEO_VIVI) += vivi.o | 133 | obj-$(CONFIG_VIDEO_VIVI) += vivi.o |
134 | obj-$(CONFIG_VIDEO_CX23885) += cx23885/ | 134 | obj-$(CONFIG_VIDEO_CX23885) += cx23885/ |
135 | 135 | ||
136 | obj-$(CONFIG_VIDEO_MX1) += mx1_camera.o | ||
136 | obj-$(CONFIG_VIDEO_MX3) += mx3_camera.o | 137 | obj-$(CONFIG_VIDEO_MX3) += mx3_camera.o |
137 | obj-$(CONFIG_VIDEO_PXA27x) += pxa_camera.o | 138 | obj-$(CONFIG_VIDEO_PXA27x) += pxa_camera.o |
138 | obj-$(CONFIG_VIDEO_SH_MOBILE_CEU) += sh_mobile_ceu_camera.o | 139 | obj-$(CONFIG_VIDEO_SH_MOBILE_CEU) += sh_mobile_ceu_camera.o |
diff --git a/drivers/media/video/mx1_camera.c b/drivers/media/video/mx1_camera.c new file mode 100644 index 000000000000..86fab56c5a20 --- /dev/null +++ b/drivers/media/video/mx1_camera.c | |||
@@ -0,0 +1,827 @@ | |||
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> | ||
31 | #include <linux/time.h> | ||
32 | #include <linux/version.h> | ||
33 | #include <linux/videodev2.h> | ||
34 | |||
35 | #include <media/soc_camera.h> | ||
36 | #include <media/v4l2-common.h> | ||
37 | #include <media/v4l2-dev.h> | ||
38 | #include <media/videobuf-dma-contig.h> | ||
39 | |||
40 | #include <asm/dma.h> | ||
41 | #include <asm/fiq.h> | ||
42 | #include <mach/dma-mx1-mx2.h> | ||
43 | #include <mach/hardware.h> | ||
44 | #include <mach/mx1_camera.h> | ||
45 | |||
46 | /* | ||
47 | * CSI registers | ||
48 | */ | ||
49 | #define DMA_CCR(x) (0x8c + ((x) << 6)) /* Control Registers */ | ||
50 | #define DMA_DIMR 0x08 /* Interrupt mask Register */ | ||
51 | #define CSICR1 0x00 /* CSI Control Register 1 */ | ||
52 | #define CSISR 0x08 /* CSI Status Register */ | ||
53 | #define CSIRXR 0x10 /* CSI RxFIFO Register */ | ||
54 | |||
55 | #define CSICR1_RXFF_LEVEL(x) (((x) & 0x3) << 19) | ||
56 | #define CSICR1_SOF_POL (1 << 17) | ||
57 | #define CSICR1_SOF_INTEN (1 << 16) | ||
58 | #define CSICR1_MCLKDIV(x) (((x) & 0xf) << 12) | ||
59 | #define CSICR1_MCLKEN (1 << 9) | ||
60 | #define CSICR1_FCC (1 << 8) | ||
61 | #define CSICR1_BIG_ENDIAN (1 << 7) | ||
62 | #define CSICR1_CLR_RXFIFO (1 << 5) | ||
63 | #define CSICR1_GCLK_MODE (1 << 4) | ||
64 | #define CSICR1_DATA_POL (1 << 2) | ||
65 | #define CSICR1_REDGE (1 << 1) | ||
66 | #define CSICR1_EN (1 << 0) | ||
67 | |||
68 | #define CSISR_SFF_OR_INT (1 << 25) | ||
69 | #define CSISR_RFF_OR_INT (1 << 24) | ||
70 | #define CSISR_STATFF_INT (1 << 21) | ||
71 | #define CSISR_RXFF_INT (1 << 18) | ||
72 | #define CSISR_SOF_INT (1 << 16) | ||
73 | #define CSISR_DRDY (1 << 0) | ||
74 | |||
75 | #define VERSION_CODE KERNEL_VERSION(0, 0, 1) | ||
76 | #define DRIVER_NAME "mx1-camera" | ||
77 | |||
78 | #define CSI_IRQ_MASK (CSISR_SFF_OR_INT | CSISR_RFF_OR_INT | \ | ||
79 | CSISR_STATFF_INT | CSISR_RXFF_INT | CSISR_SOF_INT) | ||
80 | |||
81 | #define CSI_BUS_FLAGS (SOCAM_MASTER | SOCAM_HSYNC_ACTIVE_HIGH | \ | ||
82 | SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_LOW | \ | ||
83 | SOCAM_PCLK_SAMPLE_RISING | SOCAM_PCLK_SAMPLE_FALLING | \ | ||
84 | SOCAM_DATA_ACTIVE_HIGH | SOCAM_DATA_ACTIVE_LOW | \ | ||
85 | SOCAM_DATAWIDTH_8) | ||
86 | |||
87 | #define MAX_VIDEO_MEM 16 /* Video memory limit in megabytes */ | ||
88 | |||
89 | /* | ||
90 | * Structures | ||
91 | */ | ||
92 | |||
93 | /* buffer for one video frame */ | ||
94 | struct mx1_buffer { | ||
95 | /* common v4l buffer stuff -- must be first */ | ||
96 | struct videobuf_buffer vb; | ||
97 | const struct soc_camera_data_format *fmt; | ||
98 | int inwork; | ||
99 | }; | ||
100 | |||
101 | /* i.MX1/i.MXL is only supposed to handle one camera on its Camera Sensor | ||
102 | * Interface. If anyone ever builds hardware to enable more than | ||
103 | * one camera, they will have to modify this driver too */ | ||
104 | struct mx1_camera_dev { | ||
105 | struct soc_camera_device *icd; | ||
106 | struct mx1_camera_pdata *pdata; | ||
107 | struct mx1_buffer *active; | ||
108 | struct device *dev; | ||
109 | struct resource *res; | ||
110 | struct clk *clk; | ||
111 | struct list_head capture; | ||
112 | |||
113 | void __iomem *base; | ||
114 | int dma_chan; | ||
115 | unsigned int irq; | ||
116 | unsigned long mclk; | ||
117 | |||
118 | spinlock_t lock; | ||
119 | }; | ||
120 | |||
121 | /* | ||
122 | * Videobuf operations | ||
123 | */ | ||
124 | static int mx1_videobuf_setup(struct videobuf_queue *vq, unsigned int *count, | ||
125 | unsigned int *size) | ||
126 | { | ||
127 | struct soc_camera_device *icd = vq->priv_data; | ||
128 | |||
129 | *size = icd->width * icd->height * | ||
130 | ((icd->current_fmt->depth + 7) >> 3); | ||
131 | |||
132 | if (!*count) | ||
133 | *count = 32; | ||
134 | |||
135 | while (*size * *count > MAX_VIDEO_MEM * 1024 * 1024) | ||
136 | (*count)--; | ||
137 | |||
138 | dev_dbg(&icd->dev, "count=%d, size=%d\n", *count, *size); | ||
139 | |||
140 | return 0; | ||
141 | } | ||
142 | |||
143 | static void free_buffer(struct videobuf_queue *vq, struct mx1_buffer *buf) | ||
144 | { | ||
145 | struct soc_camera_device *icd = vq->priv_data; | ||
146 | struct videobuf_buffer *vb = &buf->vb; | ||
147 | |||
148 | BUG_ON(in_interrupt()); | ||
149 | |||
150 | dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__, | ||
151 | vb, vb->baddr, vb->bsize); | ||
152 | |||
153 | /* This waits until this buffer is out of danger, i.e., until it is no | ||
154 | * longer in STATE_QUEUED or STATE_ACTIVE */ | ||
155 | videobuf_waiton(vb, 0, 0); | ||
156 | videobuf_dma_contig_free(vq, vb); | ||
157 | |||
158 | vb->state = VIDEOBUF_NEEDS_INIT; | ||
159 | } | ||
160 | |||
161 | static int mx1_videobuf_prepare(struct videobuf_queue *vq, | ||
162 | struct videobuf_buffer *vb, enum v4l2_field field) | ||
163 | { | ||
164 | struct soc_camera_device *icd = vq->priv_data; | ||
165 | struct mx1_buffer *buf = container_of(vb, struct mx1_buffer, vb); | ||
166 | int ret; | ||
167 | |||
168 | dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__, | ||
169 | vb, vb->baddr, vb->bsize); | ||
170 | |||
171 | /* Added list head initialization on alloc */ | ||
172 | WARN_ON(!list_empty(&vb->queue)); | ||
173 | |||
174 | BUG_ON(NULL == icd->current_fmt); | ||
175 | |||
176 | /* I think, in buf_prepare you only have to protect global data, | ||
177 | * the actual buffer is yours */ | ||
178 | buf->inwork = 1; | ||
179 | |||
180 | if (buf->fmt != icd->current_fmt || | ||
181 | vb->width != icd->width || | ||
182 | vb->height != icd->height || | ||
183 | vb->field != field) { | ||
184 | buf->fmt = icd->current_fmt; | ||
185 | vb->width = icd->width; | ||
186 | vb->height = icd->height; | ||
187 | vb->field = field; | ||
188 | vb->state = VIDEOBUF_NEEDS_INIT; | ||
189 | } | ||
190 | |||
191 | vb->size = vb->width * vb->height * ((buf->fmt->depth + 7) >> 3); | ||
192 | if (0 != vb->baddr && vb->bsize < vb->size) { | ||
193 | ret = -EINVAL; | ||
194 | goto out; | ||
195 | } | ||
196 | |||
197 | if (vb->state == VIDEOBUF_NEEDS_INIT) { | ||
198 | ret = videobuf_iolock(vq, vb, NULL); | ||
199 | if (ret) | ||
200 | goto fail; | ||
201 | |||
202 | vb->state = VIDEOBUF_PREPARED; | ||
203 | } | ||
204 | |||
205 | buf->inwork = 0; | ||
206 | |||
207 | return 0; | ||
208 | |||
209 | fail: | ||
210 | free_buffer(vq, buf); | ||
211 | out: | ||
212 | buf->inwork = 0; | ||
213 | return ret; | ||
214 | } | ||
215 | |||
216 | static int mx1_camera_setup_dma(struct mx1_camera_dev *pcdev) | ||
217 | { | ||
218 | struct videobuf_buffer *vbuf = &pcdev->active->vb; | ||
219 | int ret; | ||
220 | |||
221 | if (unlikely(!pcdev->active)) { | ||
222 | dev_err(pcdev->dev, "DMA End IRQ with no active buffer\n"); | ||
223 | return -EFAULT; | ||
224 | } | ||
225 | |||
226 | /* setup sg list for future DMA */ | ||
227 | ret = imx_dma_setup_single(pcdev->dma_chan, | ||
228 | videobuf_to_dma_contig(vbuf), | ||
229 | vbuf->size, pcdev->res->start + | ||
230 | CSIRXR, DMA_MODE_READ); | ||
231 | if (unlikely(ret)) | ||
232 | dev_err(pcdev->dev, "Failed to setup DMA sg list\n"); | ||
233 | |||
234 | return ret; | ||
235 | } | ||
236 | |||
237 | static void mx1_videobuf_queue(struct videobuf_queue *vq, | ||
238 | struct videobuf_buffer *vb) | ||
239 | { | ||
240 | struct soc_camera_device *icd = vq->priv_data; | ||
241 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | ||
242 | struct mx1_camera_dev *pcdev = ici->priv; | ||
243 | struct mx1_buffer *buf = container_of(vb, struct mx1_buffer, vb); | ||
244 | unsigned long flags; | ||
245 | |||
246 | dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__, | ||
247 | vb, vb->baddr, vb->bsize); | ||
248 | |||
249 | spin_lock_irqsave(&pcdev->lock, flags); | ||
250 | |||
251 | list_add_tail(&vb->queue, &pcdev->capture); | ||
252 | |||
253 | vb->state = VIDEOBUF_ACTIVE; | ||
254 | |||
255 | if (!pcdev->active) { | ||
256 | pcdev->active = buf; | ||
257 | |||
258 | /* setup sg list for future DMA */ | ||
259 | if (!mx1_camera_setup_dma(pcdev)) { | ||
260 | unsigned int temp; | ||
261 | /* enable SOF irq */ | ||
262 | temp = __raw_readl(pcdev->base + CSICR1) | | ||
263 | CSICR1_SOF_INTEN; | ||
264 | __raw_writel(temp, pcdev->base + CSICR1); | ||
265 | } | ||
266 | } | ||
267 | |||
268 | spin_unlock_irqrestore(&pcdev->lock, flags); | ||
269 | } | ||
270 | |||
271 | static void mx1_videobuf_release(struct videobuf_queue *vq, | ||
272 | struct videobuf_buffer *vb) | ||
273 | { | ||
274 | struct mx1_buffer *buf = container_of(vb, struct mx1_buffer, vb); | ||
275 | #ifdef DEBUG | ||
276 | struct soc_camera_device *icd = vq->priv_data; | ||
277 | |||
278 | dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__, | ||
279 | vb, vb->baddr, vb->bsize); | ||
280 | |||
281 | switch (vb->state) { | ||
282 | case VIDEOBUF_ACTIVE: | ||
283 | dev_dbg(&icd->dev, "%s (active)\n", __func__); | ||
284 | break; | ||
285 | case VIDEOBUF_QUEUED: | ||
286 | dev_dbg(&icd->dev, "%s (queued)\n", __func__); | ||
287 | break; | ||
288 | case VIDEOBUF_PREPARED: | ||
289 | dev_dbg(&icd->dev, "%s (prepared)\n", __func__); | ||
290 | break; | ||
291 | default: | ||
292 | dev_dbg(&icd->dev, "%s (unknown)\n", __func__); | ||
293 | break; | ||
294 | } | ||
295 | #endif | ||
296 | |||
297 | free_buffer(vq, buf); | ||
298 | } | ||
299 | |||
300 | static void mx1_camera_wakeup(struct mx1_camera_dev *pcdev, | ||
301 | struct videobuf_buffer *vb, | ||
302 | struct mx1_buffer *buf) | ||
303 | { | ||
304 | /* _init is used to debug races, see comment in mx1_camera_reqbufs() */ | ||
305 | list_del_init(&vb->queue); | ||
306 | vb->state = VIDEOBUF_DONE; | ||
307 | do_gettimeofday(&vb->ts); | ||
308 | vb->field_count++; | ||
309 | wake_up(&vb->done); | ||
310 | |||
311 | if (list_empty(&pcdev->capture)) { | ||
312 | pcdev->active = NULL; | ||
313 | return; | ||
314 | } | ||
315 | |||
316 | pcdev->active = list_entry(pcdev->capture.next, | ||
317 | struct mx1_buffer, vb.queue); | ||
318 | |||
319 | /* setup sg list for future DMA */ | ||
320 | if (likely(!mx1_camera_setup_dma(pcdev))) { | ||
321 | unsigned int temp; | ||
322 | |||
323 | /* enable SOF irq */ | ||
324 | temp = __raw_readl(pcdev->base + CSICR1) | CSICR1_SOF_INTEN; | ||
325 | __raw_writel(temp, pcdev->base + CSICR1); | ||
326 | } | ||
327 | } | ||
328 | |||
329 | static void mx1_camera_dma_irq(int channel, void *data) | ||
330 | { | ||
331 | struct mx1_camera_dev *pcdev = data; | ||
332 | struct mx1_buffer *buf; | ||
333 | struct videobuf_buffer *vb; | ||
334 | unsigned long flags; | ||
335 | |||
336 | spin_lock_irqsave(&pcdev->lock, flags); | ||
337 | |||
338 | imx_dma_disable(channel); | ||
339 | |||
340 | if (unlikely(!pcdev->active)) { | ||
341 | dev_err(pcdev->dev, "DMA End IRQ with no active buffer\n"); | ||
342 | goto out; | ||
343 | } | ||
344 | |||
345 | vb = &pcdev->active->vb; | ||
346 | buf = container_of(vb, struct mx1_buffer, vb); | ||
347 | WARN_ON(buf->inwork || list_empty(&vb->queue)); | ||
348 | dev_dbg(pcdev->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__, | ||
349 | vb, vb->baddr, vb->bsize); | ||
350 | |||
351 | mx1_camera_wakeup(pcdev, vb, buf); | ||
352 | out: | ||
353 | spin_unlock_irqrestore(&pcdev->lock, flags); | ||
354 | } | ||
355 | |||
356 | static struct videobuf_queue_ops mx1_videobuf_ops = { | ||
357 | .buf_setup = mx1_videobuf_setup, | ||
358 | .buf_prepare = mx1_videobuf_prepare, | ||
359 | .buf_queue = mx1_videobuf_queue, | ||
360 | .buf_release = mx1_videobuf_release, | ||
361 | }; | ||
362 | |||
363 | static void mx1_camera_init_videobuf(struct videobuf_queue *q, | ||
364 | struct soc_camera_device *icd) | ||
365 | { | ||
366 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | ||
367 | struct mx1_camera_dev *pcdev = ici->priv; | ||
368 | |||
369 | videobuf_queue_dma_contig_init(q, &mx1_videobuf_ops, pcdev->dev, | ||
370 | &pcdev->lock, | ||
371 | V4L2_BUF_TYPE_VIDEO_CAPTURE, | ||
372 | V4L2_FIELD_NONE, | ||
373 | sizeof(struct mx1_buffer), icd); | ||
374 | } | ||
375 | |||
376 | static int mclk_get_divisor(struct mx1_camera_dev *pcdev) | ||
377 | { | ||
378 | unsigned int mclk = pcdev->mclk; | ||
379 | unsigned long div; | ||
380 | unsigned long lcdclk; | ||
381 | |||
382 | lcdclk = clk_get_rate(pcdev->clk); | ||
383 | |||
384 | /* We verify platform_mclk_10khz != 0, so if anyone breaks it, here | ||
385 | * they get a nice Oops */ | ||
386 | div = (lcdclk + 2 * mclk - 1) / (2 * mclk) - 1; | ||
387 | |||
388 | dev_dbg(pcdev->dev, "System clock %lukHz, target freq %dkHz, " | ||
389 | "divisor %lu\n", lcdclk / 1000, mclk / 1000, div); | ||
390 | |||
391 | return div; | ||
392 | } | ||
393 | |||
394 | static void mx1_camera_activate(struct mx1_camera_dev *pcdev) | ||
395 | { | ||
396 | unsigned int csicr1 = CSICR1_EN; | ||
397 | |||
398 | dev_dbg(pcdev->dev, "Activate device\n"); | ||
399 | |||
400 | clk_enable(pcdev->clk); | ||
401 | |||
402 | /* enable CSI before doing anything else */ | ||
403 | __raw_writel(csicr1, pcdev->base + CSICR1); | ||
404 | |||
405 | csicr1 |= CSICR1_MCLKEN | CSICR1_FCC | CSICR1_GCLK_MODE; | ||
406 | csicr1 |= CSICR1_MCLKDIV(mclk_get_divisor(pcdev)); | ||
407 | csicr1 |= CSICR1_RXFF_LEVEL(2); /* 16 words */ | ||
408 | |||
409 | __raw_writel(csicr1, pcdev->base + CSICR1); | ||
410 | } | ||
411 | |||
412 | static void mx1_camera_deactivate(struct mx1_camera_dev *pcdev) | ||
413 | { | ||
414 | dev_dbg(pcdev->dev, "Deactivate device\n"); | ||
415 | |||
416 | /* Disable all CSI interface */ | ||
417 | __raw_writel(0x00, pcdev->base + CSICR1); | ||
418 | |||
419 | clk_disable(pcdev->clk); | ||
420 | } | ||
421 | |||
422 | /* The following two functions absolutely depend on the fact, that | ||
423 | * there can be only one camera on i.MX1/i.MXL camera sensor interface */ | ||
424 | static int mx1_camera_add_device(struct soc_camera_device *icd) | ||
425 | { | ||
426 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | ||
427 | struct mx1_camera_dev *pcdev = ici->priv; | ||
428 | int ret; | ||
429 | |||
430 | if (pcdev->icd) { | ||
431 | ret = -EBUSY; | ||
432 | goto ebusy; | ||
433 | } | ||
434 | |||
435 | dev_info(&icd->dev, "MX1 Camera driver attached to camera %d\n", | ||
436 | icd->devnum); | ||
437 | |||
438 | mx1_camera_activate(pcdev); | ||
439 | ret = icd->ops->init(icd); | ||
440 | |||
441 | if (!ret) | ||
442 | pcdev->icd = icd; | ||
443 | |||
444 | ebusy: | ||
445 | return ret; | ||
446 | } | ||
447 | |||
448 | static void mx1_camera_remove_device(struct soc_camera_device *icd) | ||
449 | { | ||
450 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | ||
451 | struct mx1_camera_dev *pcdev = ici->priv; | ||
452 | unsigned int csicr1; | ||
453 | |||
454 | BUG_ON(icd != pcdev->icd); | ||
455 | |||
456 | /* disable interrupts */ | ||
457 | csicr1 = __raw_readl(pcdev->base + CSICR1) & ~CSI_IRQ_MASK; | ||
458 | __raw_writel(csicr1, pcdev->base + CSICR1); | ||
459 | |||
460 | /* Stop DMA engine */ | ||
461 | imx_dma_disable(pcdev->dma_chan); | ||
462 | |||
463 | dev_info(&icd->dev, "MX1 Camera driver detached from camera %d\n", | ||
464 | icd->devnum); | ||
465 | |||
466 | icd->ops->release(icd); | ||
467 | |||
468 | mx1_camera_deactivate(pcdev); | ||
469 | |||
470 | pcdev->icd = NULL; | ||
471 | } | ||
472 | |||
473 | static int mx1_camera_set_crop(struct soc_camera_device *icd, | ||
474 | struct v4l2_rect *rect) | ||
475 | { | ||
476 | return icd->ops->set_crop(icd, rect); | ||
477 | } | ||
478 | |||
479 | static int mx1_camera_set_bus_param(struct soc_camera_device *icd, __u32 pixfmt) | ||
480 | { | ||
481 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | ||
482 | struct mx1_camera_dev *pcdev = ici->priv; | ||
483 | unsigned long camera_flags, common_flags; | ||
484 | unsigned int csicr1; | ||
485 | int ret; | ||
486 | |||
487 | camera_flags = icd->ops->query_bus_param(icd); | ||
488 | |||
489 | /* MX1 supports only 8bit buswidth */ | ||
490 | common_flags = soc_camera_bus_param_compatible(camera_flags, | ||
491 | CSI_BUS_FLAGS); | ||
492 | if (!common_flags) | ||
493 | return -EINVAL; | ||
494 | |||
495 | icd->buswidth = 8; | ||
496 | |||
497 | /* Make choises, based on platform choice */ | ||
498 | if ((common_flags & SOCAM_VSYNC_ACTIVE_HIGH) && | ||
499 | (common_flags & SOCAM_VSYNC_ACTIVE_LOW)) { | ||
500 | if (!pcdev->pdata || | ||
501 | pcdev->pdata->flags & MX1_CAMERA_VSYNC_HIGH) | ||
502 | common_flags &= ~SOCAM_VSYNC_ACTIVE_LOW; | ||
503 | else | ||
504 | common_flags &= ~SOCAM_VSYNC_ACTIVE_HIGH; | ||
505 | } | ||
506 | |||
507 | if ((common_flags & SOCAM_PCLK_SAMPLE_RISING) && | ||
508 | (common_flags & SOCAM_PCLK_SAMPLE_FALLING)) { | ||
509 | if (!pcdev->pdata || | ||
510 | pcdev->pdata->flags & MX1_CAMERA_PCLK_RISING) | ||
511 | common_flags &= ~SOCAM_PCLK_SAMPLE_FALLING; | ||
512 | else | ||
513 | common_flags &= ~SOCAM_PCLK_SAMPLE_RISING; | ||
514 | } | ||
515 | |||
516 | if ((common_flags & SOCAM_DATA_ACTIVE_HIGH) && | ||
517 | (common_flags & SOCAM_DATA_ACTIVE_LOW)) { | ||
518 | if (!pcdev->pdata || | ||
519 | pcdev->pdata->flags & MX1_CAMERA_DATA_HIGH) | ||
520 | common_flags &= ~SOCAM_DATA_ACTIVE_LOW; | ||
521 | else | ||
522 | common_flags &= ~SOCAM_DATA_ACTIVE_HIGH; | ||
523 | } | ||
524 | |||
525 | ret = icd->ops->set_bus_param(icd, common_flags); | ||
526 | if (ret < 0) | ||
527 | return ret; | ||
528 | |||
529 | csicr1 = __raw_readl(pcdev->base + CSICR1); | ||
530 | |||
531 | if (common_flags & SOCAM_PCLK_SAMPLE_RISING) | ||
532 | csicr1 |= CSICR1_REDGE; | ||
533 | if (common_flags & SOCAM_VSYNC_ACTIVE_HIGH) | ||
534 | csicr1 |= CSICR1_SOF_POL; | ||
535 | if (common_flags & SOCAM_DATA_ACTIVE_LOW) | ||
536 | csicr1 |= CSICR1_DATA_POL; | ||
537 | |||
538 | __raw_writel(csicr1, pcdev->base + CSICR1); | ||
539 | |||
540 | return 0; | ||
541 | } | ||
542 | |||
543 | static int mx1_camera_set_fmt(struct soc_camera_device *icd, | ||
544 | struct v4l2_format *f) | ||
545 | { | ||
546 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | ||
547 | const struct soc_camera_format_xlate *xlate; | ||
548 | struct v4l2_pix_format *pix = &f->fmt.pix; | ||
549 | int ret; | ||
550 | |||
551 | xlate = soc_camera_xlate_by_fourcc(icd, pix->pixelformat); | ||
552 | if (!xlate) { | ||
553 | dev_warn(&ici->dev, "Format %x not found\n", pix->pixelformat); | ||
554 | return -EINVAL; | ||
555 | } | ||
556 | |||
557 | ret = icd->ops->set_fmt(icd, f); | ||
558 | if (!ret) { | ||
559 | icd->buswidth = xlate->buswidth; | ||
560 | icd->current_fmt = xlate->host_fmt; | ||
561 | } | ||
562 | |||
563 | return ret; | ||
564 | } | ||
565 | |||
566 | static int mx1_camera_try_fmt(struct soc_camera_device *icd, | ||
567 | struct v4l2_format *f) | ||
568 | { | ||
569 | /* TODO: limit to mx1 hardware capabilities */ | ||
570 | |||
571 | /* limit to sensor capabilities */ | ||
572 | return icd->ops->try_fmt(icd, f); | ||
573 | } | ||
574 | |||
575 | static int mx1_camera_reqbufs(struct soc_camera_file *icf, | ||
576 | struct v4l2_requestbuffers *p) | ||
577 | { | ||
578 | int i; | ||
579 | |||
580 | /* This is for locking debugging only. I removed spinlocks and now I | ||
581 | * check whether .prepare is ever called on a linked buffer, or whether | ||
582 | * a dma IRQ can occur for an in-work or unlinked buffer. Until now | ||
583 | * it hadn't triggered */ | ||
584 | for (i = 0; i < p->count; i++) { | ||
585 | struct mx1_buffer *buf = container_of(icf->vb_vidq.bufs[i], | ||
586 | struct mx1_buffer, vb); | ||
587 | buf->inwork = 0; | ||
588 | INIT_LIST_HEAD(&buf->vb.queue); | ||
589 | } | ||
590 | |||
591 | return 0; | ||
592 | } | ||
593 | |||
594 | static unsigned int mx1_camera_poll(struct file *file, poll_table *pt) | ||
595 | { | ||
596 | struct soc_camera_file *icf = file->private_data; | ||
597 | struct mx1_buffer *buf; | ||
598 | |||
599 | buf = list_entry(icf->vb_vidq.stream.next, struct mx1_buffer, | ||
600 | vb.stream); | ||
601 | |||
602 | poll_wait(file, &buf->vb.done, pt); | ||
603 | |||
604 | if (buf->vb.state == VIDEOBUF_DONE || | ||
605 | buf->vb.state == VIDEOBUF_ERROR) | ||
606 | return POLLIN | POLLRDNORM; | ||
607 | |||
608 | return 0; | ||
609 | } | ||
610 | |||
611 | static int mx1_camera_querycap(struct soc_camera_host *ici, | ||
612 | struct v4l2_capability *cap) | ||
613 | { | ||
614 | /* cap->name is set by the friendly caller:-> */ | ||
615 | strlcpy(cap->card, "i.MX1/i.MXL Camera", sizeof(cap->card)); | ||
616 | cap->version = VERSION_CODE; | ||
617 | cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; | ||
618 | |||
619 | return 0; | ||
620 | } | ||
621 | |||
622 | static struct soc_camera_host_ops mx1_soc_camera_host_ops = { | ||
623 | .owner = THIS_MODULE, | ||
624 | .add = mx1_camera_add_device, | ||
625 | .remove = mx1_camera_remove_device, | ||
626 | .set_bus_param = mx1_camera_set_bus_param, | ||
627 | .set_crop = mx1_camera_set_crop, | ||
628 | .set_fmt = mx1_camera_set_fmt, | ||
629 | .try_fmt = mx1_camera_try_fmt, | ||
630 | .init_videobuf = mx1_camera_init_videobuf, | ||
631 | .reqbufs = mx1_camera_reqbufs, | ||
632 | .poll = mx1_camera_poll, | ||
633 | .querycap = mx1_camera_querycap, | ||
634 | }; | ||
635 | |||
636 | /* Should be allocated dynamically too, but we have only one. */ | ||
637 | static struct soc_camera_host mx1_soc_camera_host = { | ||
638 | .drv_name = DRIVER_NAME, | ||
639 | .ops = &mx1_soc_camera_host_ops, | ||
640 | }; | ||
641 | |||
642 | static struct fiq_handler fh = { | ||
643 | .name = "csi_sof" | ||
644 | }; | ||
645 | |||
646 | static int __init mx1_camera_probe(struct platform_device *pdev) | ||
647 | { | ||
648 | struct mx1_camera_dev *pcdev; | ||
649 | struct resource *res; | ||
650 | struct pt_regs regs; | ||
651 | struct clk *clk; | ||
652 | void __iomem *base; | ||
653 | unsigned int irq; | ||
654 | int err = 0; | ||
655 | |||
656 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | ||
657 | irq = platform_get_irq(pdev, 0); | ||
658 | if (!res || !irq) { | ||
659 | err = -ENODEV; | ||
660 | goto exit; | ||
661 | } | ||
662 | |||
663 | clk = clk_get(&pdev->dev, "csi_clk"); | ||
664 | if (IS_ERR(clk)) { | ||
665 | err = PTR_ERR(clk); | ||
666 | goto exit; | ||
667 | } | ||
668 | |||
669 | pcdev = kzalloc(sizeof(*pcdev), GFP_KERNEL); | ||
670 | if (!pcdev) { | ||
671 | dev_err(&pdev->dev, "Could not allocate pcdev\n"); | ||
672 | err = -ENOMEM; | ||
673 | goto exit_put_clk; | ||
674 | } | ||
675 | |||
676 | dev_set_drvdata(&pdev->dev, pcdev); | ||
677 | pcdev->res = res; | ||
678 | pcdev->clk = clk; | ||
679 | |||
680 | pcdev->pdata = pdev->dev.platform_data; | ||
681 | |||
682 | if (pcdev->pdata) | ||
683 | pcdev->mclk = pcdev->pdata->mclk_10khz * 10000; | ||
684 | |||
685 | if (!pcdev->mclk) { | ||
686 | dev_warn(&pdev->dev, | ||
687 | "mclk_10khz == 0! Please, fix your platform data. " | ||
688 | "Using default 20MHz\n"); | ||
689 | pcdev->mclk = 20000000; | ||
690 | } | ||
691 | |||
692 | INIT_LIST_HEAD(&pcdev->capture); | ||
693 | spin_lock_init(&pcdev->lock); | ||
694 | |||
695 | /* | ||
696 | * Request the regions. | ||
697 | */ | ||
698 | if (!request_mem_region(res->start, resource_size(res), DRIVER_NAME)) { | ||
699 | err = -EBUSY; | ||
700 | goto exit_kfree; | ||
701 | } | ||
702 | |||
703 | base = ioremap(res->start, resource_size(res)); | ||
704 | if (!base) { | ||
705 | err = -ENOMEM; | ||
706 | goto exit_release; | ||
707 | } | ||
708 | pcdev->irq = irq; | ||
709 | pcdev->base = base; | ||
710 | pcdev->dev = &pdev->dev; | ||
711 | |||
712 | /* request dma */ | ||
713 | pcdev->dma_chan = imx_dma_request_by_prio(DRIVER_NAME, DMA_PRIO_HIGH); | ||
714 | if (pcdev->dma_chan < 0) { | ||
715 | dev_err(pcdev->dev, "Can't request DMA for MX1 CSI\n"); | ||
716 | err = -EBUSY; | ||
717 | goto exit_iounmap; | ||
718 | } | ||
719 | dev_dbg(pcdev->dev, "got DMA channel %d\n", pcdev->dma_chan); | ||
720 | |||
721 | imx_dma_setup_handlers(pcdev->dma_chan, mx1_camera_dma_irq, NULL, | ||
722 | pcdev); | ||
723 | |||
724 | imx_dma_config_channel(pcdev->dma_chan, IMX_DMA_TYPE_FIFO, | ||
725 | IMX_DMA_MEMSIZE_32, DMA_REQ_CSI_R, 0); | ||
726 | /* burst length : 16 words = 64 bytes */ | ||
727 | imx_dma_config_burstlen(pcdev->dma_chan, 0); | ||
728 | |||
729 | /* request irq */ | ||
730 | err = claim_fiq(&fh); | ||
731 | if (err) { | ||
732 | dev_err(pcdev->dev, "Camera interrupt register failed \n"); | ||
733 | goto exit_free_dma; | ||
734 | } | ||
735 | |||
736 | set_fiq_handler(&mx1_camera_sof_fiq_start, &mx1_camera_sof_fiq_end - | ||
737 | &mx1_camera_sof_fiq_start); | ||
738 | |||
739 | regs.ARM_r8 = DMA_BASE + DMA_DIMR; | ||
740 | regs.ARM_r9 = DMA_BASE + DMA_CCR(pcdev->dma_chan); | ||
741 | regs.ARM_r10 = (long)pcdev->base + CSICR1; | ||
742 | regs.ARM_fp = (long)pcdev->base + CSISR; | ||
743 | regs.ARM_sp = 1 << pcdev->dma_chan; | ||
744 | set_fiq_regs(®s); | ||
745 | |||
746 | mxc_set_irq_fiq(irq, 1); | ||
747 | enable_fiq(irq); | ||
748 | |||
749 | mx1_soc_camera_host.priv = pcdev; | ||
750 | mx1_soc_camera_host.dev.parent = &pdev->dev; | ||
751 | mx1_soc_camera_host.nr = pdev->id; | ||
752 | err = soc_camera_host_register(&mx1_soc_camera_host); | ||
753 | if (err) | ||
754 | goto exit_free_irq; | ||
755 | |||
756 | dev_info(&pdev->dev, "MX1 Camera driver loaded\n"); | ||
757 | |||
758 | return 0; | ||
759 | |||
760 | exit_free_irq: | ||
761 | disable_fiq(irq); | ||
762 | mxc_set_irq_fiq(irq, 0); | ||
763 | release_fiq(&fh); | ||
764 | exit_free_dma: | ||
765 | imx_dma_free(pcdev->dma_chan); | ||
766 | exit_iounmap: | ||
767 | iounmap(base); | ||
768 | exit_release: | ||
769 | release_mem_region(res->start, resource_size(res)); | ||
770 | exit_kfree: | ||
771 | kfree(pcdev); | ||
772 | exit_put_clk: | ||
773 | clk_put(clk); | ||
774 | exit: | ||
775 | return err; | ||
776 | } | ||
777 | |||
778 | static int __exit mx1_camera_remove(struct platform_device *pdev) | ||
779 | { | ||
780 | struct mx1_camera_dev *pcdev = platform_get_drvdata(pdev); | ||
781 | struct resource *res; | ||
782 | |||
783 | imx_dma_free(pcdev->dma_chan); | ||
784 | disable_fiq(pcdev->irq); | ||
785 | mxc_set_irq_fiq(pcdev->irq, 0); | ||
786 | release_fiq(&fh); | ||
787 | |||
788 | clk_put(pcdev->clk); | ||
789 | |||
790 | soc_camera_host_unregister(&mx1_soc_camera_host); | ||
791 | |||
792 | iounmap(pcdev->base); | ||
793 | |||
794 | res = pcdev->res; | ||
795 | release_mem_region(res->start, resource_size(res)); | ||
796 | |||
797 | kfree(pcdev); | ||
798 | |||
799 | dev_info(&pdev->dev, "MX1 Camera driver unloaded\n"); | ||
800 | |||
801 | return 0; | ||
802 | } | ||
803 | |||
804 | static struct platform_driver mx1_camera_driver = { | ||
805 | .driver = { | ||
806 | .name = DRIVER_NAME, | ||
807 | }, | ||
808 | .remove = __exit_p(mx1_camera_remove), | ||
809 | }; | ||
810 | |||
811 | static int __init mx1_camera_init(void) | ||
812 | { | ||
813 | return platform_driver_probe(&mx1_camera_driver, mx1_camera_probe); | ||
814 | } | ||
815 | |||
816 | static void __exit mx1_camera_exit(void) | ||
817 | { | ||
818 | return platform_driver_unregister(&mx1_camera_driver); | ||
819 | } | ||
820 | |||
821 | module_init(mx1_camera_init); | ||
822 | module_exit(mx1_camera_exit); | ||
823 | |||
824 | MODULE_DESCRIPTION("i.MX1/i.MXL SoC Camera Host driver"); | ||
825 | MODULE_AUTHOR("Paulius Zaleckas <paulius.zaleckas@teltonika.lt>"); | ||
826 | MODULE_LICENSE("GPL v2"); | ||
827 | MODULE_ALIAS("platform:" DRIVER_NAME); | ||