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Full support for Ginger Console
[linux-ginger.git] / drivers / media / video / mx3_camera.c
blob7db82bdf6f31bc9421308b21872fb2da39813da0
1 /*
2 * V4L2 Driver for i.MX3x camera host
3 *
4 * Copyright (C) 2008
5 * Guennadi Liakhovetski, DENX Software Engineering, <lg@denx.de>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11
12 #include <linux/init.h>
13 #include <linux/module.h>
14 #include <linux/version.h>
15 #include <linux/videodev2.h>
16 #include <linux/platform_device.h>
17 #include <linux/clk.h>
18 #include <linux/vmalloc.h>
19 #include <linux/interrupt.h>
20 #include <linux/sched.h>
21
22 #include <media/v4l2-common.h>
23 #include <media/v4l2-dev.h>
24 #include <media/videobuf-dma-contig.h>
25 #include <media/soc_camera.h>
26
27 #include <mach/ipu.h>
28 #include <mach/mx3_camera.h>
29
30 #define MX3_CAM_DRV_NAME "mx3-camera"
31
32 /* CMOS Sensor Interface Registers */
33 #define CSI_REG_START 0x60
34
35 #define CSI_SENS_CONF (0x60 - CSI_REG_START)
36 #define CSI_SENS_FRM_SIZE (0x64 - CSI_REG_START)
37 #define CSI_ACT_FRM_SIZE (0x68 - CSI_REG_START)
38 #define CSI_OUT_FRM_CTRL (0x6C - CSI_REG_START)
39 #define CSI_TST_CTRL (0x70 - CSI_REG_START)
40 #define CSI_CCIR_CODE_1 (0x74 - CSI_REG_START)
41 #define CSI_CCIR_CODE_2 (0x78 - CSI_REG_START)
42 #define CSI_CCIR_CODE_3 (0x7C - CSI_REG_START)
43 #define CSI_FLASH_STROBE_1 (0x80 - CSI_REG_START)
44 #define CSI_FLASH_STROBE_2 (0x84 - CSI_REG_START)
45
46 #define CSI_SENS_CONF_VSYNC_POL_SHIFT 0
47 #define CSI_SENS_CONF_HSYNC_POL_SHIFT 1
48 #define CSI_SENS_CONF_DATA_POL_SHIFT 2
49 #define CSI_SENS_CONF_PIX_CLK_POL_SHIFT 3
50 #define CSI_SENS_CONF_SENS_PRTCL_SHIFT 4
51 #define CSI_SENS_CONF_SENS_CLKSRC_SHIFT 7
52 #define CSI_SENS_CONF_DATA_FMT_SHIFT 8
53 #define CSI_SENS_CONF_DATA_WIDTH_SHIFT 10
54 #define CSI_SENS_CONF_EXT_VSYNC_SHIFT 15
55 #define CSI_SENS_CONF_DIVRATIO_SHIFT 16
56
57 #define CSI_SENS_CONF_DATA_FMT_RGB_YUV444 (0UL << CSI_SENS_CONF_DATA_FMT_SHIFT)
58 #define CSI_SENS_CONF_DATA_FMT_YUV422 (2UL << CSI_SENS_CONF_DATA_FMT_SHIFT)
59 #define CSI_SENS_CONF_DATA_FMT_BAYER (3UL << CSI_SENS_CONF_DATA_FMT_SHIFT)
60
61 #define MAX_VIDEO_MEM 16
62
63 struct mx3_camera_buffer {
64 /* common v4l buffer stuff -- must be first */
65 struct videobuf_buffer vb;
66 const struct soc_camera_data_format *fmt;
67
68 /* One descriptot per scatterlist (per frame) */
69 struct dma_async_tx_descriptor *txd;
70
71 /* We have to "build" a scatterlist ourselves - one element per frame */
72 struct scatterlist sg;
73 };
74
75 /**
76 * struct mx3_camera_dev - i.MX3x camera (CSI) object
77 * @dev: camera device, to which the coherent buffer is attached
78 * @icd: currently attached camera sensor
79 * @clk: pointer to clock
80 * @base: remapped register base address
81 * @pdata: platform data
82 * @platform_flags: platform flags
83 * @mclk: master clock frequency in Hz
84 * @capture: list of capture videobuffers
85 * @lock: protects video buffer lists
86 * @active: active video buffer
87 * @idmac_channel: array of pointers to IPU DMAC DMA channels
88 * @soc_host: embedded soc_host object
89 */
90 struct mx3_camera_dev {
91 /*
92 * i.MX3x is only supposed to handle one camera on its Camera Sensor
93 * Interface. If anyone ever builds hardware to enable more than one
94 * camera _simultaneously_, they will have to modify this driver too
95 */
96 struct soc_camera_device *icd;
97 struct clk *clk;
98
99 void __iomem *base;
100
101 struct mx3_camera_pdata *pdata;
102
103 unsigned long platform_flags;
104 unsigned long mclk;
105
106 struct list_head capture;
107 spinlock_t lock; /* Protects video buffer lists */
108 struct mx3_camera_buffer *active;
109
110 /* IDMAC / dmaengine interface */
111 struct idmac_channel *idmac_channel[1]; /* We need one channel */
112
113 struct soc_camera_host soc_host;
114 };
115
116 struct dma_chan_request {
117 struct mx3_camera_dev *mx3_cam;
118 enum ipu_channel id;
119 };
120
121 static int mx3_camera_set_bus_param(struct soc_camera_device *icd, __u32 pixfmt);
122
123 static u32 csi_reg_read(struct mx3_camera_dev *mx3, off_t reg)
124 {
125 return __raw_readl(mx3->base + reg);
126 }
127
128 static void csi_reg_write(struct mx3_camera_dev *mx3, u32 value, off_t reg)
129 {
130 __raw_writel(value, mx3->base + reg);
131 }
132
133 /* Called from the IPU IDMAC ISR */
134 static void mx3_cam_dma_done(void *arg)
135 {
136 struct idmac_tx_desc *desc = to_tx_desc(arg);
137 struct dma_chan *chan = desc->txd.chan;
138 struct idmac_channel *ichannel = to_idmac_chan(chan);
139 struct mx3_camera_dev *mx3_cam = ichannel->client;
140 struct videobuf_buffer *vb;
141
142 dev_dbg(chan->device->dev, "callback cookie %d, active DMA 0x%08x\n",
143 desc->txd.cookie, mx3_cam->active ? sg_dma_address(&mx3_cam->active->sg) : 0);
144
145 spin_lock(&mx3_cam->lock);
146 if (mx3_cam->active) {
147 vb = &mx3_cam->active->vb;
148
149 list_del_init(&vb->queue);
150 vb->state = VIDEOBUF_DONE;
151 do_gettimeofday(&vb->ts);
152 vb->field_count++;
153 wake_up(&vb->done);
154 }
155
156 if (list_empty(&mx3_cam->capture)) {
157 mx3_cam->active = NULL;
158 spin_unlock(&mx3_cam->lock);
159
160 /*
161 * stop capture - without further buffers IPU_CHA_BUF0_RDY will
162 * not get updated
163 */
164 return;
165 }
166
167 mx3_cam->active = list_entry(mx3_cam->capture.next,
168 struct mx3_camera_buffer, vb.queue);
169 mx3_cam->active->vb.state = VIDEOBUF_ACTIVE;
170 spin_unlock(&mx3_cam->lock);
171 }
172
173 static void free_buffer(struct videobuf_queue *vq, struct mx3_camera_buffer *buf)
174 {
175 struct soc_camera_device *icd = vq->priv_data;
176 struct videobuf_buffer *vb = &buf->vb;
177 struct dma_async_tx_descriptor *txd = buf->txd;
178 struct idmac_channel *ichan;
179
180 BUG_ON(in_interrupt());
181
182 dev_dbg(icd->dev.parent, "%s (vb=0x%p) 0x%08lx %d\n", __func__,
183 vb, vb->baddr, vb->bsize);
184
185 /*
186 * This waits until this buffer is out of danger, i.e., until it is no
187 * longer in STATE_QUEUED or STATE_ACTIVE
188 */
189 videobuf_waiton(vb, 0, 0);
190 if (txd) {
191 ichan = to_idmac_chan(txd->chan);
192 async_tx_ack(txd);
193 }
194 videobuf_dma_contig_free(vq, vb);
195 buf->txd = NULL;
196
197 vb->state = VIDEOBUF_NEEDS_INIT;
198 }
199
200 /*
201 * Videobuf operations
202 */
203
204 /*
205 * Calculate the __buffer__ (not data) size and number of buffers.
206 * Called with .vb_lock held
207 */
208 static int mx3_videobuf_setup(struct videobuf_queue *vq, unsigned int *count,
209 unsigned int *size)
210 {
211 struct soc_camera_device *icd = vq->priv_data;
212 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
213 struct mx3_camera_dev *mx3_cam = ici->priv;
214 /*
215 * bits-per-pixel (depth) as specified in camera's pixel format does
216 * not necessarily match what the camera interface writes to RAM, but
217 * it should be good enough for now.
218 */
219 unsigned int bpp = DIV_ROUND_UP(icd->current_fmt->depth, 8);
220
221 if (!mx3_cam->idmac_channel[0])
222 return -EINVAL;
223
224 *size = icd->user_width * icd->user_height * bpp;
225
226 if (!*count)
227 *count = 32;
228
229 if (*size * *count > MAX_VIDEO_MEM * 1024 * 1024)
230 *count = MAX_VIDEO_MEM * 1024 * 1024 / *size;
231
232 return 0;
233 }
234
235 /* Called with .vb_lock held */
236 static int mx3_videobuf_prepare(struct videobuf_queue *vq,
237 struct videobuf_buffer *vb, enum v4l2_field field)
238 {
239 struct soc_camera_device *icd = vq->priv_data;
240 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
241 struct mx3_camera_dev *mx3_cam = ici->priv;
242 struct mx3_camera_buffer *buf =
243 container_of(vb, struct mx3_camera_buffer, vb);
244 /* current_fmt _must_ always be set */
245 size_t new_size = icd->user_width * icd->user_height *
246 ((icd->current_fmt->depth + 7) >> 3);
247 int ret;
248
249 /*
250 * I think, in buf_prepare you only have to protect global data,
251 * the actual buffer is yours
252 */
253
254 if (buf->fmt != icd->current_fmt ||
255 vb->width != icd->user_width ||
256 vb->height != icd->user_height ||
257 vb->field != field) {
258 buf->fmt = icd->current_fmt;
259 vb->width = icd->user_width;
260 vb->height = icd->user_height;
261 vb->field = field;
262 if (vb->state != VIDEOBUF_NEEDS_INIT)
263 free_buffer(vq, buf);
264 }
265
266 if (vb->baddr && vb->bsize < new_size) {
267 /* User provided buffer, but it is too small */
268 ret = -ENOMEM;
269 goto out;
270 }
271
272 if (vb->state == VIDEOBUF_NEEDS_INIT) {
273 struct idmac_channel *ichan = mx3_cam->idmac_channel[0];
274 struct scatterlist *sg = &buf->sg;
275
276 /*
277 * The total size of video-buffers that will be allocated / mapped.
278 * *size that we calculated in videobuf_setup gets assigned to
279 * vb->bsize, and now we use the same calculation to get vb->size.
280 */
281 vb->size = new_size;
282
283 /* This actually (allocates and) maps buffers */
284 ret = videobuf_iolock(vq, vb, NULL);
285 if (ret)
286 goto fail;
287
288 /*
289 * We will have to configure the IDMAC channel. It has two slots
290 * for DMA buffers, we shall enter the first two buffers there,
291 * and then submit new buffers in DMA-ready interrupts
292 */
293 sg_init_table(sg, 1);
294 sg_dma_address(sg) = videobuf_to_dma_contig(vb);
295 sg_dma_len(sg) = vb->size;
296
297 buf->txd = ichan->dma_chan.device->device_prep_slave_sg(
298 &ichan->dma_chan, sg, 1, DMA_FROM_DEVICE,
299 DMA_PREP_INTERRUPT);
300 if (!buf->txd) {
301 ret = -EIO;
302 goto fail;
303 }
304
305 buf->txd->callback_param = buf->txd;
306 buf->txd->callback = mx3_cam_dma_done;
307
308 vb->state = VIDEOBUF_PREPARED;
309 }
310
311 return 0;
312
313 fail:
314 free_buffer(vq, buf);
315 out:
316 return ret;
317 }
318
319 static enum pixel_fmt fourcc_to_ipu_pix(__u32 fourcc)
320 {
321 /* Add more formats as need arises and test possibilities appear... */
322 switch (fourcc) {
323 case V4L2_PIX_FMT_RGB565:
324 return IPU_PIX_FMT_RGB565;
325 case V4L2_PIX_FMT_RGB24:
326 return IPU_PIX_FMT_RGB24;
327 case V4L2_PIX_FMT_RGB332:
328 return IPU_PIX_FMT_RGB332;
329 case V4L2_PIX_FMT_YUV422P:
330 return IPU_PIX_FMT_YVU422P;
331 default:
332 return IPU_PIX_FMT_GENERIC;
333 }
334 }
335
336 /*
337 * Called with .vb_lock mutex held and
338 * under spinlock_irqsave(&mx3_cam->lock, ...)
339 */
340 static void mx3_videobuf_queue(struct videobuf_queue *vq,
341 struct videobuf_buffer *vb)
342 {
343 struct soc_camera_device *icd = vq->priv_data;
344 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
345 struct mx3_camera_dev *mx3_cam = ici->priv;
346 struct mx3_camera_buffer *buf =
347 container_of(vb, struct mx3_camera_buffer, vb);
348 struct dma_async_tx_descriptor *txd = buf->txd;
349 struct idmac_channel *ichan = to_idmac_chan(txd->chan);
350 struct idmac_video_param *video = &ichan->params.video;
351 const struct soc_camera_data_format *data_fmt = icd->current_fmt;
352 dma_cookie_t cookie;
353
354 BUG_ON(!irqs_disabled());
355
356 /* This is the configuration of one sg-element */
357 video->out_pixel_fmt = fourcc_to_ipu_pix(data_fmt->fourcc);
358 video->out_width = icd->user_width;
359 video->out_height = icd->user_height;
360 video->out_stride = icd->user_width;
361
362 #ifdef DEBUG
363 /* helps to see what DMA actually has written */
364 memset((void *)vb->baddr, 0xaa, vb->bsize);
365 #endif
366
367 list_add_tail(&vb->queue, &mx3_cam->capture);
368
369 if (!mx3_cam->active) {
370 mx3_cam->active = buf;
371 vb->state = VIDEOBUF_ACTIVE;
372 } else {
373 vb->state = VIDEOBUF_QUEUED;
374 }
375
376 spin_unlock_irq(&mx3_cam->lock);
377
378 cookie = txd->tx_submit(txd);
379 dev_dbg(icd->dev.parent, "Submitted cookie %d DMA 0x%08x\n",
380 cookie, sg_dma_address(&buf->sg));
381
382 spin_lock_irq(&mx3_cam->lock);
383
384 if (cookie >= 0)
385 return;
386
387 /* Submit error */
388 vb->state = VIDEOBUF_PREPARED;
389
390 list_del_init(&vb->queue);
391
392 if (mx3_cam->active == buf)
393 mx3_cam->active = NULL;
394 }
395
396 /* Called with .vb_lock held */
397 static void mx3_videobuf_release(struct videobuf_queue *vq,
398 struct videobuf_buffer *vb)
399 {
400 struct soc_camera_device *icd = vq->priv_data;
401 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
402 struct mx3_camera_dev *mx3_cam = ici->priv;
403 struct mx3_camera_buffer *buf =
404 container_of(vb, struct mx3_camera_buffer, vb);
405 unsigned long flags;
406
407 dev_dbg(icd->dev.parent,
408 "Release%s DMA 0x%08x (state %d), queue %sempty\n",
409 mx3_cam->active == buf ? " active" : "", sg_dma_address(&buf->sg),
410 vb->state, list_empty(&vb->queue) ? "" : "not ");
411 spin_lock_irqsave(&mx3_cam->lock, flags);
412 if ((vb->state == VIDEOBUF_ACTIVE || vb->state == VIDEOBUF_QUEUED) &&
413 !list_empty(&vb->queue)) {
414 vb->state = VIDEOBUF_ERROR;
415
416 list_del_init(&vb->queue);
417 if (mx3_cam->active == buf)
418 mx3_cam->active = NULL;
419 }
420 spin_unlock_irqrestore(&mx3_cam->lock, flags);
421 free_buffer(vq, buf);
422 }
423
424 static struct videobuf_queue_ops mx3_videobuf_ops = {
425 .buf_setup = mx3_videobuf_setup,
426 .buf_prepare = mx3_videobuf_prepare,
427 .buf_queue = mx3_videobuf_queue,
428 .buf_release = mx3_videobuf_release,
429 };
430
431 static void mx3_camera_init_videobuf(struct videobuf_queue *q,
432 struct soc_camera_device *icd)
433 {
434 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
435 struct mx3_camera_dev *mx3_cam = ici->priv;
436
437 videobuf_queue_dma_contig_init(q, &mx3_videobuf_ops, icd->dev.parent,
438 &mx3_cam->lock,
439 V4L2_BUF_TYPE_VIDEO_CAPTURE,
440 V4L2_FIELD_NONE,
441 sizeof(struct mx3_camera_buffer), icd);
442 }
443
444 /* First part of ipu_csi_init_interface() */
445 static void mx3_camera_activate(struct mx3_camera_dev *mx3_cam,
446 struct soc_camera_device *icd)
447 {
448 u32 conf;
449 long rate;
450
451 /* Set default size: ipu_csi_set_window_size() */
452 csi_reg_write(mx3_cam, (640 - 1) | ((480 - 1) << 16), CSI_ACT_FRM_SIZE);
453 /* ...and position to 0:0: ipu_csi_set_window_pos() */
454 conf = csi_reg_read(mx3_cam, CSI_OUT_FRM_CTRL) & 0xffff0000;
455 csi_reg_write(mx3_cam, conf, CSI_OUT_FRM_CTRL);
456
457 /* We use only gated clock synchronisation mode so far */
458 conf = 0 << CSI_SENS_CONF_SENS_PRTCL_SHIFT;
459
460 /* Set generic data, platform-biggest bus-width */
461 conf |= CSI_SENS_CONF_DATA_FMT_BAYER;
462
463 if (mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_15)
464 conf |= 3 << CSI_SENS_CONF_DATA_WIDTH_SHIFT;
465 else if (mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_10)
466 conf |= 2 << CSI_SENS_CONF_DATA_WIDTH_SHIFT;
467 else if (mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_8)
468 conf |= 1 << CSI_SENS_CONF_DATA_WIDTH_SHIFT;
469 else/* if (mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_4)*/
470 conf |= 0 << CSI_SENS_CONF_DATA_WIDTH_SHIFT;
471
472 if (mx3_cam->platform_flags & MX3_CAMERA_CLK_SRC)
473 conf |= 1 << CSI_SENS_CONF_SENS_CLKSRC_SHIFT;
474 if (mx3_cam->platform_flags & MX3_CAMERA_EXT_VSYNC)
475 conf |= 1 << CSI_SENS_CONF_EXT_VSYNC_SHIFT;
476 if (mx3_cam->platform_flags & MX3_CAMERA_DP)
477 conf |= 1 << CSI_SENS_CONF_DATA_POL_SHIFT;
478 if (mx3_cam->platform_flags & MX3_CAMERA_PCP)
479 conf |= 1 << CSI_SENS_CONF_PIX_CLK_POL_SHIFT;
480 if (mx3_cam->platform_flags & MX3_CAMERA_HSP)
481 conf |= 1 << CSI_SENS_CONF_HSYNC_POL_SHIFT;
482 if (mx3_cam->platform_flags & MX3_CAMERA_VSP)
483 conf |= 1 << CSI_SENS_CONF_VSYNC_POL_SHIFT;
484
485 /* ipu_csi_init_interface() */
486 csi_reg_write(mx3_cam, conf, CSI_SENS_CONF);
487
488 clk_enable(mx3_cam->clk);
489 rate = clk_round_rate(mx3_cam->clk, mx3_cam->mclk);
490 dev_dbg(icd->dev.parent, "Set SENS_CONF to %x, rate %ld\n", conf, rate);
491 if (rate)
492 clk_set_rate(mx3_cam->clk, rate);
493 }
494
495 /* Called with .video_lock held */
496 static int mx3_camera_add_device(struct soc_camera_device *icd)
497 {
498 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
499 struct mx3_camera_dev *mx3_cam = ici->priv;
500
501 if (mx3_cam->icd)
502 return -EBUSY;
503
504 mx3_camera_activate(mx3_cam, icd);
505
506 mx3_cam->icd = icd;
507
508 dev_info(icd->dev.parent, "MX3 Camera driver attached to camera %d\n",
509 icd->devnum);
510
511 return 0;
512 }
513
514 /* Called with .video_lock held */
515 static void mx3_camera_remove_device(struct soc_camera_device *icd)
516 {
517 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
518 struct mx3_camera_dev *mx3_cam = ici->priv;
519 struct idmac_channel **ichan = &mx3_cam->idmac_channel[0];
520
521 BUG_ON(icd != mx3_cam->icd);
522
523 if (*ichan) {
524 dma_release_channel(&(*ichan)->dma_chan);
525 *ichan = NULL;
526 }
527
528 clk_disable(mx3_cam->clk);
529
530 mx3_cam->icd = NULL;
531
532 dev_info(icd->dev.parent, "MX3 Camera driver detached from camera %d\n",
533 icd->devnum);
534 }
535
536 static bool channel_change_requested(struct soc_camera_device *icd,
537 struct v4l2_rect *rect)
538 {
539 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
540 struct mx3_camera_dev *mx3_cam = ici->priv;
541 struct idmac_channel *ichan = mx3_cam->idmac_channel[0];
542
543 /* Do buffers have to be re-allocated or channel re-configured? */
544 return ichan && rect->width * rect->height >
545 icd->user_width * icd->user_height;
546 }
547
548 static int test_platform_param(struct mx3_camera_dev *mx3_cam,
549 unsigned char buswidth, unsigned long *flags)
550 {
551 /*
552 * Platform specified synchronization and pixel clock polarities are
553 * only a recommendation and are only used during probing. MX3x
554 * camera interface only works in master mode, i.e., uses HSYNC and
555 * VSYNC signals from the sensor
556 */
557 *flags = SOCAM_MASTER |
558 SOCAM_HSYNC_ACTIVE_HIGH |
559 SOCAM_HSYNC_ACTIVE_LOW |
560 SOCAM_VSYNC_ACTIVE_HIGH |
561 SOCAM_VSYNC_ACTIVE_LOW |
562 SOCAM_PCLK_SAMPLE_RISING |
563 SOCAM_PCLK_SAMPLE_FALLING |
564 SOCAM_DATA_ACTIVE_HIGH |
565 SOCAM_DATA_ACTIVE_LOW;
566
567 /* If requested data width is supported by the platform, use it or any
568 * possible lower value - i.MX31 is smart enough to schift bits */
569 switch (buswidth) {
570 case 15:
571 if (!(mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_15))
572 return -EINVAL;
573 *flags |= SOCAM_DATAWIDTH_15 | SOCAM_DATAWIDTH_10 |
574 SOCAM_DATAWIDTH_8 | SOCAM_DATAWIDTH_4;
575 break;
576 case 10:
577 if (!(mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_10))
578 return -EINVAL;
579 *flags |= SOCAM_DATAWIDTH_10 | SOCAM_DATAWIDTH_8 |
580 SOCAM_DATAWIDTH_4;
581 break;
582 case 8:
583 if (!(mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_8))
584 return -EINVAL;
585 *flags |= SOCAM_DATAWIDTH_8 | SOCAM_DATAWIDTH_4;
586 break;
587 case 4:
588 if (!(mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_4))
589 return -EINVAL;
590 *flags |= SOCAM_DATAWIDTH_4;
591 break;
592 default:
593 dev_warn(mx3_cam->soc_host.v4l2_dev.dev,
594 "Unsupported bus width %d\n", buswidth);
595 return -EINVAL;
596 }
597
598 return 0;
599 }
600
601 static int mx3_camera_try_bus_param(struct soc_camera_device *icd,
602 const unsigned int depth)
603 {
604 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
605 struct mx3_camera_dev *mx3_cam = ici->priv;
606 unsigned long bus_flags, camera_flags;
607 int ret = test_platform_param(mx3_cam, depth, &bus_flags);
608
609 dev_dbg(icd->dev.parent, "request bus width %d bit: %d\n", depth, ret);
610
611 if (ret < 0)
612 return ret;
613
614 camera_flags = icd->ops->query_bus_param(icd);
615
616 ret = soc_camera_bus_param_compatible(camera_flags, bus_flags);
617 if (ret < 0)
618 dev_warn(icd->dev.parent,
619 "Flags incompatible: camera %lx, host %lx\n",
620 camera_flags, bus_flags);
621
622 return ret;
623 }
624
625 static bool chan_filter(struct dma_chan *chan, void *arg)
626 {
627 struct dma_chan_request *rq = arg;
628 struct mx3_camera_pdata *pdata;
629
630 if (!rq)
631 return false;
632
633 pdata = rq->mx3_cam->soc_host.v4l2_dev.dev->platform_data;
634
635 return rq->id == chan->chan_id &&
636 pdata->dma_dev == chan->device->dev;
637 }
638
639 static const struct soc_camera_data_format mx3_camera_formats[] = {
640 {
641 .name = "Bayer (sRGB) 8 bit",
642 .depth = 8,
643 .fourcc = V4L2_PIX_FMT_SBGGR8,
644 .colorspace = V4L2_COLORSPACE_SRGB,
645 }, {
646 .name = "Monochrome 8 bit",
647 .depth = 8,
648 .fourcc = V4L2_PIX_FMT_GREY,
649 .colorspace = V4L2_COLORSPACE_JPEG,
650 },
651 };
652
653 static bool buswidth_supported(struct soc_camera_host *ici, int depth)
654 {
655 struct mx3_camera_dev *mx3_cam = ici->priv;
656
657 switch (depth) {
658 case 4:
659 return !!(mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_4);
660 case 8:
661 return !!(mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_8);
662 case 10:
663 return !!(mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_10);
664 case 15:
665 return !!(mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_15);
666 }
667 return false;
668 }
669
670 static int mx3_camera_get_formats(struct soc_camera_device *icd, int idx,
671 struct soc_camera_format_xlate *xlate)
672 {
673 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
674 int formats = 0, buswidth, ret;
675
676 buswidth = icd->formats[idx].depth;
677
678 if (!buswidth_supported(ici, buswidth))
679 return 0;
680
681 ret = mx3_camera_try_bus_param(icd, buswidth);
682 if (ret < 0)
683 return 0;
684
685 switch (icd->formats[idx].fourcc) {
686 case V4L2_PIX_FMT_SGRBG10:
687 formats++;
688 if (xlate) {
689 xlate->host_fmt = &mx3_camera_formats[0];
690 xlate->cam_fmt = icd->formats + idx;
691 xlate->buswidth = buswidth;
692 xlate++;
693 dev_dbg(icd->dev.parent,
694 "Providing format %s using %s\n",
695 mx3_camera_formats[0].name,
696 icd->formats[idx].name);
697 }
698 goto passthrough;
699 case V4L2_PIX_FMT_Y16:
700 formats++;
701 if (xlate) {
702 xlate->host_fmt = &mx3_camera_formats[1];
703 xlate->cam_fmt = icd->formats + idx;
704 xlate->buswidth = buswidth;
705 xlate++;
706 dev_dbg(icd->dev.parent,
707 "Providing format %s using %s\n",
708 mx3_camera_formats[0].name,
709 icd->formats[idx].name);
710 }
711 default:
712 passthrough:
713 /* Generic pass-through */
714 formats++;
715 if (xlate) {
716 xlate->host_fmt = icd->formats + idx;
717 xlate->cam_fmt = icd->formats + idx;
718 xlate->buswidth = buswidth;
719 xlate++;
720 dev_dbg(icd->dev.parent,
721 "Providing format %s in pass-through mode\n",
722 icd->formats[idx].name);
723 }
724 }
725
726 return formats;
727 }
728
729 static void configure_geometry(struct mx3_camera_dev *mx3_cam,
730 unsigned int width, unsigned int height)
731 {
732 u32 ctrl, width_field, height_field;
733
734 /* Setup frame size - this cannot be changed on-the-fly... */
735 width_field = width - 1;
736 height_field = height - 1;
737 csi_reg_write(mx3_cam, width_field | (height_field << 16), CSI_SENS_FRM_SIZE);
738
739 csi_reg_write(mx3_cam, width_field << 16, CSI_FLASH_STROBE_1);
740 csi_reg_write(mx3_cam, (height_field << 16) | 0x22, CSI_FLASH_STROBE_2);
741
742 csi_reg_write(mx3_cam, width_field | (height_field << 16), CSI_ACT_FRM_SIZE);
743
744 /* ...and position */
745 ctrl = csi_reg_read(mx3_cam, CSI_OUT_FRM_CTRL) & 0xffff0000;
746 /* Sensor does the cropping */
747 csi_reg_write(mx3_cam, ctrl | 0 | (0 << 8), CSI_OUT_FRM_CTRL);
748 }
749
750 static int acquire_dma_channel(struct mx3_camera_dev *mx3_cam)
751 {
752 dma_cap_mask_t mask;
753 struct dma_chan *chan;
754 struct idmac_channel **ichan = &mx3_cam->idmac_channel[0];
755 /* We have to use IDMAC_IC_7 for Bayer / generic data */
756 struct dma_chan_request rq = {.mx3_cam = mx3_cam,
757 .id = IDMAC_IC_7};
758
759 if (*ichan) {
760 struct videobuf_buffer *vb, *_vb;
761 dma_release_channel(&(*ichan)->dma_chan);
762 *ichan = NULL;
763 mx3_cam->active = NULL;
764 list_for_each_entry_safe(vb, _vb, &mx3_cam->capture, queue) {
765 list_del_init(&vb->queue);
766 vb->state = VIDEOBUF_ERROR;
767 wake_up(&vb->done);
768 }
769 }
770
771 dma_cap_zero(mask);
772 dma_cap_set(DMA_SLAVE, mask);
773 dma_cap_set(DMA_PRIVATE, mask);
774 chan = dma_request_channel(mask, chan_filter, &rq);
775 if (!chan)
776 return -EBUSY;
777
778 *ichan = to_idmac_chan(chan);
779 (*ichan)->client = mx3_cam;
780
781 return 0;
782 }
783
784 /*
785 * FIXME: learn to use stride != width, then we can keep stride properly aligned
786 * and support arbitrary (even) widths.
787 */
788 static inline void stride_align(__s32 *width)
789 {
790 if (((*width + 7) & ~7) < 4096)
791 *width = (*width + 7) & ~7;
792 else
793 *width = *width & ~7;
794 }
795
796 /*
797 * As long as we don't implement host-side cropping and scaling, we can use
798 * default g_crop and cropcap from soc_camera.c
799 */
800 static int mx3_camera_set_crop(struct soc_camera_device *icd,
801 struct v4l2_crop *a)
802 {
803 struct v4l2_rect *rect = &a->c;
804 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
805 struct mx3_camera_dev *mx3_cam = ici->priv;
806 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
807 struct v4l2_format f = {.type = V4L2_BUF_TYPE_VIDEO_CAPTURE};
808 struct v4l2_pix_format *pix = &f.fmt.pix;
809 int ret;
810
811 soc_camera_limit_side(&rect->left, &rect->width, 0, 2, 4096);
812 soc_camera_limit_side(&rect->top, &rect->height, 0, 2, 4096);
813
814 ret = v4l2_subdev_call(sd, video, s_crop, a);
815 if (ret < 0)
816 return ret;
817
818 /* The capture device might have changed its output */
819 ret = v4l2_subdev_call(sd, video, g_fmt, &f);
820 if (ret < 0)
821 return ret;
822
823 if (pix->width & 7) {
824 /* Ouch! We can only handle 8-byte aligned width... */
825 stride_align(&pix->width);
826 ret = v4l2_subdev_call(sd, video, s_fmt, &f);
827 if (ret < 0)
828 return ret;
829 }
830
831 if (pix->width != icd->user_width || pix->height != icd->user_height) {
832 /*
833 * We now know pixel formats and can decide upon DMA-channel(s)
834 * So far only direct camera-to-memory is supported
835 */
836 if (channel_change_requested(icd, rect)) {
837 int ret = acquire_dma_channel(mx3_cam);
838 if (ret < 0)
839 return ret;
840 }
841
842 configure_geometry(mx3_cam, pix->width, pix->height);
843 }
844
845 dev_dbg(icd->dev.parent, "Sensor cropped %dx%d\n",
846 pix->width, pix->height);
847
848 icd->user_width = pix->width;
849 icd->user_height = pix->height;
850
851 return ret;
852 }
853
854 static int mx3_camera_set_fmt(struct soc_camera_device *icd,
855 struct v4l2_format *f)
856 {
857 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
858 struct mx3_camera_dev *mx3_cam = ici->priv;
859 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
860 const struct soc_camera_format_xlate *xlate;
861 struct v4l2_pix_format *pix = &f->fmt.pix;
862 int ret;
863
864 xlate = soc_camera_xlate_by_fourcc(icd, pix->pixelformat);
865 if (!xlate) {
866 dev_warn(icd->dev.parent, "Format %x not found\n",
867 pix->pixelformat);
868 return -EINVAL;
869 }
870
871 stride_align(&pix->width);
872 dev_dbg(icd->dev.parent, "Set format %dx%d\n", pix->width, pix->height);
873
874 ret = acquire_dma_channel(mx3_cam);
875 if (ret < 0)
876 return ret;
877
878 /*
879 * Might have to perform a complete interface initialisation like in
880 * ipu_csi_init_interface() in mxc_v4l2_s_param(). Also consider
881 * mxc_v4l2_s_fmt()
882 */
883
884 configure_geometry(mx3_cam, pix->width, pix->height);
885
886 ret = v4l2_subdev_call(sd, video, s_fmt, f);
887 if (!ret) {
888 icd->buswidth = xlate->buswidth;
889 icd->current_fmt = xlate->host_fmt;
890 }
891
892 dev_dbg(icd->dev.parent, "Sensor set %dx%d\n", pix->width, pix->height);
893
894 return ret;
895 }
896
897 static int mx3_camera_try_fmt(struct soc_camera_device *icd,
898 struct v4l2_format *f)
899 {
900 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
901 const struct soc_camera_format_xlate *xlate;
902 struct v4l2_pix_format *pix = &f->fmt.pix;
903 __u32 pixfmt = pix->pixelformat;
904 enum v4l2_field field;
905 int ret;
906
907 xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
908 if (pixfmt && !xlate) {
909 dev_warn(icd->dev.parent, "Format %x not found\n", pixfmt);
910 return -EINVAL;
911 }
912
913 /* limit to MX3 hardware capabilities */
914 if (pix->height > 4096)
915 pix->height = 4096;
916 if (pix->width > 4096)
917 pix->width = 4096;
918
919 pix->bytesperline = pix->width *
920 DIV_ROUND_UP(xlate->host_fmt->depth, 8);
921 pix->sizeimage = pix->height * pix->bytesperline;
922
923 /* camera has to see its format, but the user the original one */
924 pix->pixelformat = xlate->cam_fmt->fourcc;
925 /* limit to sensor capabilities */
926 ret = v4l2_subdev_call(sd, video, try_fmt, f);
927 pix->pixelformat = xlate->host_fmt->fourcc;
928
929 field = pix->field;
930
931 if (field == V4L2_FIELD_ANY) {
932 pix->field = V4L2_FIELD_NONE;
933 } else if (field != V4L2_FIELD_NONE) {
934 dev_err(icd->dev.parent, "Field type %d unsupported.\n", field);
935 return -EINVAL;
936 }
937
938 return ret;
939 }
940
941 static int mx3_camera_reqbufs(struct soc_camera_file *icf,
942 struct v4l2_requestbuffers *p)
943 {
944 return 0;
945 }
946
947 static unsigned int mx3_camera_poll(struct file *file, poll_table *pt)
948 {
949 struct soc_camera_file *icf = file->private_data;
950
951 return videobuf_poll_stream(file, &icf->vb_vidq, pt);
952 }
953
954 static int mx3_camera_querycap(struct soc_camera_host *ici,
955 struct v4l2_capability *cap)
956 {
957 /* cap->name is set by the firendly caller:-> */
958 strlcpy(cap->card, "i.MX3x Camera", sizeof(cap->card));
959 cap->version = KERNEL_VERSION(0, 2, 2);
960 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
961
962 return 0;
963 }
964
965 static int mx3_camera_set_bus_param(struct soc_camera_device *icd, __u32 pixfmt)
966 {
967 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
968 struct mx3_camera_dev *mx3_cam = ici->priv;
969 unsigned long bus_flags, camera_flags, common_flags;
970 u32 dw, sens_conf;
971 int ret = test_platform_param(mx3_cam, icd->buswidth, &bus_flags);
972 const struct soc_camera_format_xlate *xlate;
973 struct device *dev = icd->dev.parent;
974
975 xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
976 if (!xlate) {
977 dev_warn(dev, "Format %x not found\n", pixfmt);
978 return -EINVAL;
979 }
980
981 dev_dbg(dev, "requested bus width %d bit: %d\n",
982 icd->buswidth, ret);
983
984 if (ret < 0)
985 return ret;
986
987 camera_flags = icd->ops->query_bus_param(icd);
988
989 common_flags = soc_camera_bus_param_compatible(camera_flags, bus_flags);
990 dev_dbg(dev, "Flags cam: 0x%lx host: 0x%lx common: 0x%lx\n",
991 camera_flags, bus_flags, common_flags);
992 if (!common_flags) {
993 dev_dbg(dev, "no common flags");
994 return -EINVAL;
995 }
996
997 /* Make choices, based on platform preferences */
998 if ((common_flags & SOCAM_HSYNC_ACTIVE_HIGH) &&
999 (common_flags & SOCAM_HSYNC_ACTIVE_LOW)) {
1000 if (mx3_cam->platform_flags & MX3_CAMERA_HSP)
1001 common_flags &= ~SOCAM_HSYNC_ACTIVE_HIGH;
1002 else
1003 common_flags &= ~SOCAM_HSYNC_ACTIVE_LOW;
1004 }
1005
1006 if ((common_flags & SOCAM_VSYNC_ACTIVE_HIGH) &&
1007 (common_flags & SOCAM_VSYNC_ACTIVE_LOW)) {
1008 if (mx3_cam->platform_flags & MX3_CAMERA_VSP)
1009 common_flags &= ~SOCAM_VSYNC_ACTIVE_HIGH;
1010 else
1011 common_flags &= ~SOCAM_VSYNC_ACTIVE_LOW;
1012 }
1013
1014 if ((common_flags & SOCAM_DATA_ACTIVE_HIGH) &&
1015 (common_flags & SOCAM_DATA_ACTIVE_LOW)) {
1016 if (mx3_cam->platform_flags & MX3_CAMERA_DP)
1017 common_flags &= ~SOCAM_DATA_ACTIVE_HIGH;
1018 else
1019 common_flags &= ~SOCAM_DATA_ACTIVE_LOW;
1020 }
1021
1022 if ((common_flags & SOCAM_PCLK_SAMPLE_RISING) &&
1023 (common_flags & SOCAM_PCLK_SAMPLE_FALLING)) {
1024 if (mx3_cam->platform_flags & MX3_CAMERA_PCP)
1025 common_flags &= ~SOCAM_PCLK_SAMPLE_RISING;
1026 else
1027 common_flags &= ~SOCAM_PCLK_SAMPLE_FALLING;
1028 }
1029
1030 /* Make the camera work in widest common mode, we'll take care of
1031 * the rest */
1032 if (common_flags & SOCAM_DATAWIDTH_15)
1033 common_flags = (common_flags & ~SOCAM_DATAWIDTH_MASK) |
1034 SOCAM_DATAWIDTH_15;
1035 else if (common_flags & SOCAM_DATAWIDTH_10)
1036 common_flags = (common_flags & ~SOCAM_DATAWIDTH_MASK) |
1037 SOCAM_DATAWIDTH_10;
1038 else if (common_flags & SOCAM_DATAWIDTH_8)
1039 common_flags = (common_flags & ~SOCAM_DATAWIDTH_MASK) |
1040 SOCAM_DATAWIDTH_8;
1041 else
1042 common_flags = (common_flags & ~SOCAM_DATAWIDTH_MASK) |
1043 SOCAM_DATAWIDTH_4;
1044
1045 ret = icd->ops->set_bus_param(icd, common_flags);
1046 if (ret < 0) {
1047 dev_dbg(dev, "camera set_bus_param(%lx) returned %d\n",
1048 common_flags, ret);
1049 return ret;
1050 }
1051
1052 /*
1053 * So far only gated clock mode is supported. Add a line
1054 * (3 << CSI_SENS_CONF_SENS_PRTCL_SHIFT) |
1055 * below and select the required mode when supporting other
1056 * synchronisation protocols.
1057 */
1058 sens_conf = csi_reg_read(mx3_cam, CSI_SENS_CONF) &
1059 ~((1 << CSI_SENS_CONF_VSYNC_POL_SHIFT) |
1060 (1 << CSI_SENS_CONF_HSYNC_POL_SHIFT) |
1061 (1 << CSI_SENS_CONF_DATA_POL_SHIFT) |
1062 (1 << CSI_SENS_CONF_PIX_CLK_POL_SHIFT) |
1063 (3 << CSI_SENS_CONF_DATA_FMT_SHIFT) |
1064 (3 << CSI_SENS_CONF_DATA_WIDTH_SHIFT));
1065
1066 /* TODO: Support RGB and YUV formats */
1067
1068 /* This has been set in mx3_camera_activate(), but we clear it above */
1069 sens_conf |= CSI_SENS_CONF_DATA_FMT_BAYER;
1070
1071 if (common_flags & SOCAM_PCLK_SAMPLE_FALLING)
1072 sens_conf |= 1 << CSI_SENS_CONF_PIX_CLK_POL_SHIFT;
1073 if (common_flags & SOCAM_HSYNC_ACTIVE_LOW)
1074 sens_conf |= 1 << CSI_SENS_CONF_HSYNC_POL_SHIFT;
1075 if (common_flags & SOCAM_VSYNC_ACTIVE_LOW)
1076 sens_conf |= 1 << CSI_SENS_CONF_VSYNC_POL_SHIFT;
1077 if (common_flags & SOCAM_DATA_ACTIVE_LOW)
1078 sens_conf |= 1 << CSI_SENS_CONF_DATA_POL_SHIFT;
1079
1080 /* Just do what we're asked to do */
1081 switch (xlate->host_fmt->depth) {
1082 case 4:
1083 dw = 0 << CSI_SENS_CONF_DATA_WIDTH_SHIFT;
1084 break;
1085 case 8:
1086 dw = 1 << CSI_SENS_CONF_DATA_WIDTH_SHIFT;
1087 break;
1088 case 10:
1089 dw = 2 << CSI_SENS_CONF_DATA_WIDTH_SHIFT;
1090 break;
1091 default:
1092 /*
1093 * Actually it can only be 15 now, default is just to silence
1094 * compiler warnings
1095 */
1096 case 15:
1097 dw = 3 << CSI_SENS_CONF_DATA_WIDTH_SHIFT;
1098 }
1099
1100 csi_reg_write(mx3_cam, sens_conf | dw, CSI_SENS_CONF);
1101
1102 dev_dbg(dev, "Set SENS_CONF to %x\n", sens_conf | dw);
1103
1104 return 0;
1105 }
1106
1107 static struct soc_camera_host_ops mx3_soc_camera_host_ops = {
1108 .owner = THIS_MODULE,
1109 .add = mx3_camera_add_device,
1110 .remove = mx3_camera_remove_device,
1111 .set_crop = mx3_camera_set_crop,
1112 .set_fmt = mx3_camera_set_fmt,
1113 .try_fmt = mx3_camera_try_fmt,
1114 .get_formats = mx3_camera_get_formats,
1115 .init_videobuf = mx3_camera_init_videobuf,
1116 .reqbufs = mx3_camera_reqbufs,
1117 .poll = mx3_camera_poll,
1118 .querycap = mx3_camera_querycap,
1119 .set_bus_param = mx3_camera_set_bus_param,
1120 };
1121
1122 static int __devinit mx3_camera_probe(struct platform_device *pdev)
1123 {
1124 struct mx3_camera_dev *mx3_cam;
1125 struct resource *res;
1126 void __iomem *base;
1127 int err = 0;
1128 struct soc_camera_host *soc_host;
1129
1130 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1131 if (!res) {
1132 err = -ENODEV;
1133 goto egetres;
1134 }
1135
1136 mx3_cam = vmalloc(sizeof(*mx3_cam));
1137 if (!mx3_cam) {
1138 dev_err(&pdev->dev, "Could not allocate mx3 camera object\n");
1139 err = -ENOMEM;
1140 goto ealloc;
1141 }
1142 memset(mx3_cam, 0, sizeof(*mx3_cam));
1143
1144 mx3_cam->clk = clk_get(&pdev->dev, NULL);
1145 if (IS_ERR(mx3_cam->clk)) {
1146 err = PTR_ERR(mx3_cam->clk);
1147 goto eclkget;
1148 }
1149
1150 mx3_cam->pdata = pdev->dev.platform_data;
1151 mx3_cam->platform_flags = mx3_cam->pdata->flags;
1152 if (!(mx3_cam->platform_flags & (MX3_CAMERA_DATAWIDTH_4 |
1153 MX3_CAMERA_DATAWIDTH_8 | MX3_CAMERA_DATAWIDTH_10 |
1154 MX3_CAMERA_DATAWIDTH_15))) {
1155 /* Platform hasn't set available data widths. This is bad.
1156 * Warn and use a default. */
1157 dev_warn(&pdev->dev, "WARNING! Platform hasn't set available "
1158 "data widths, using default 8 bit\n");
1159 mx3_cam->platform_flags |= MX3_CAMERA_DATAWIDTH_8;
1160 }
1161
1162 mx3_cam->mclk = mx3_cam->pdata->mclk_10khz * 10000;
1163 if (!mx3_cam->mclk) {
1164 dev_warn(&pdev->dev,
1165 "mclk_10khz == 0! Please, fix your platform data. "
1166 "Using default 20MHz\n");
1167 mx3_cam->mclk = 20000000;
1168 }
1169
1170 /* list of video-buffers */
1171 INIT_LIST_HEAD(&mx3_cam->capture);
1172 spin_lock_init(&mx3_cam->lock);
1173
1174 base = ioremap(res->start, resource_size(res));
1175 if (!base) {
1176 pr_err("Couldn't map %x@%x\n", resource_size(res), res->start);
1177 err = -ENOMEM;
1178 goto eioremap;
1179 }
1180
1181 mx3_cam->base = base;
1182
1183 soc_host = &mx3_cam->soc_host;
1184 soc_host->drv_name = MX3_CAM_DRV_NAME;
1185 soc_host->ops = &mx3_soc_camera_host_ops;
1186 soc_host->priv = mx3_cam;
1187 soc_host->v4l2_dev.dev = &pdev->dev;
1188 soc_host->nr = pdev->id;
1189
1190 err = soc_camera_host_register(soc_host);
1191 if (err)
1192 goto ecamhostreg;
1193
1194 /* IDMAC interface */
1195 dmaengine_get();
1196
1197 return 0;
1198
1199 ecamhostreg:
1200 iounmap(base);
1201 eioremap:
1202 clk_put(mx3_cam->clk);
1203 eclkget:
1204 vfree(mx3_cam);
1205 ealloc:
1206 egetres:
1207 return err;
1208 }
1209
1210 static int __devexit mx3_camera_remove(struct platform_device *pdev)
1211 {
1212 struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev);
1213 struct mx3_camera_dev *mx3_cam = container_of(soc_host,
1214 struct mx3_camera_dev, soc_host);
1215
1216 clk_put(mx3_cam->clk);
1217
1218 soc_camera_host_unregister(soc_host);
1219
1220 iounmap(mx3_cam->base);
1221
1222 /*
1223 * The channel has either not been allocated,
1224 * or should have been released
1225 */
1226 if (WARN_ON(mx3_cam->idmac_channel[0]))
1227 dma_release_channel(&mx3_cam->idmac_channel[0]->dma_chan);
1228
1229 vfree(mx3_cam);
1230
1231 dmaengine_put();
1232
1233 dev_info(&pdev->dev, "i.MX3x Camera driver unloaded\n");
1234
1235 return 0;
1236 }
1237
1238 static struct platform_driver mx3_camera_driver = {
1239 .driver = {
1240 .name = MX3_CAM_DRV_NAME,
1241 },
1242 .probe = mx3_camera_probe,
1243 .remove = __devexit_p(mx3_camera_remove),
1244 };
1245
1246
1247 static int __init mx3_camera_init(void)
1248 {
1249 return platform_driver_register(&mx3_camera_driver);
1250 }
1251
1252 static void __exit mx3_camera_exit(void)
1253 {
1254 platform_driver_unregister(&mx3_camera_driver);
1255 }
1256
1257 module_init(mx3_camera_init);
1258 module_exit(mx3_camera_exit);
1259
1260 MODULE_DESCRIPTION("i.MX3x SoC Camera Host driver");
1261 MODULE_AUTHOR("Guennadi Liakhovetski <lg@denx.de>");
1262 MODULE_LICENSE("GPL v2");
1263 MODULE_ALIAS("platform:" MX3_CAM_DRV_NAME);
Linux for Ginger Game Console