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4f67130a GL |
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> | |
f39c1ab3 | 20 | #include <linux/sched.h> |
4f67130a GL |
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> | |
760697be | 26 | #include <media/soc_mediabus.h> |
4f67130a GL |
27 | |
28 | #include <mach/ipu.h> | |
29 | #include <mach/mx3_camera.h> | |
30 | ||
31 | #define MX3_CAM_DRV_NAME "mx3-camera" | |
32 | ||
33 | /* CMOS Sensor Interface Registers */ | |
34 | #define CSI_REG_START 0x60 | |
35 | ||
36 | #define CSI_SENS_CONF (0x60 - CSI_REG_START) | |
37 | #define CSI_SENS_FRM_SIZE (0x64 - CSI_REG_START) | |
38 | #define CSI_ACT_FRM_SIZE (0x68 - CSI_REG_START) | |
39 | #define CSI_OUT_FRM_CTRL (0x6C - CSI_REG_START) | |
40 | #define CSI_TST_CTRL (0x70 - CSI_REG_START) | |
41 | #define CSI_CCIR_CODE_1 (0x74 - CSI_REG_START) | |
42 | #define CSI_CCIR_CODE_2 (0x78 - CSI_REG_START) | |
43 | #define CSI_CCIR_CODE_3 (0x7C - CSI_REG_START) | |
44 | #define CSI_FLASH_STROBE_1 (0x80 - CSI_REG_START) | |
45 | #define CSI_FLASH_STROBE_2 (0x84 - CSI_REG_START) | |
46 | ||
47 | #define CSI_SENS_CONF_VSYNC_POL_SHIFT 0 | |
48 | #define CSI_SENS_CONF_HSYNC_POL_SHIFT 1 | |
49 | #define CSI_SENS_CONF_DATA_POL_SHIFT 2 | |
50 | #define CSI_SENS_CONF_PIX_CLK_POL_SHIFT 3 | |
51 | #define CSI_SENS_CONF_SENS_PRTCL_SHIFT 4 | |
52 | #define CSI_SENS_CONF_SENS_CLKSRC_SHIFT 7 | |
53 | #define CSI_SENS_CONF_DATA_FMT_SHIFT 8 | |
54 | #define CSI_SENS_CONF_DATA_WIDTH_SHIFT 10 | |
55 | #define CSI_SENS_CONF_EXT_VSYNC_SHIFT 15 | |
56 | #define CSI_SENS_CONF_DIVRATIO_SHIFT 16 | |
57 | ||
58 | #define CSI_SENS_CONF_DATA_FMT_RGB_YUV444 (0UL << CSI_SENS_CONF_DATA_FMT_SHIFT) | |
59 | #define CSI_SENS_CONF_DATA_FMT_YUV422 (2UL << CSI_SENS_CONF_DATA_FMT_SHIFT) | |
60 | #define CSI_SENS_CONF_DATA_FMT_BAYER (3UL << CSI_SENS_CONF_DATA_FMT_SHIFT) | |
61 | ||
62 | #define MAX_VIDEO_MEM 16 | |
63 | ||
64 | struct mx3_camera_buffer { | |
65 | /* common v4l buffer stuff -- must be first */ | |
66 | struct videobuf_buffer vb; | |
760697be | 67 | enum v4l2_mbus_pixelcode code; |
4f67130a GL |
68 | |
69 | /* One descriptot per scatterlist (per frame) */ | |
70 | struct dma_async_tx_descriptor *txd; | |
71 | ||
72 | /* We have to "build" a scatterlist ourselves - one element per frame */ | |
73 | struct scatterlist sg; | |
74 | }; | |
75 | ||
76 | /** | |
77 | * struct mx3_camera_dev - i.MX3x camera (CSI) object | |
78 | * @dev: camera device, to which the coherent buffer is attached | |
79 | * @icd: currently attached camera sensor | |
80 | * @clk: pointer to clock | |
81 | * @base: remapped register base address | |
82 | * @pdata: platform data | |
83 | * @platform_flags: platform flags | |
84 | * @mclk: master clock frequency in Hz | |
85 | * @capture: list of capture videobuffers | |
86 | * @lock: protects video buffer lists | |
87 | * @active: active video buffer | |
88 | * @idmac_channel: array of pointers to IPU DMAC DMA channels | |
89 | * @soc_host: embedded soc_host object | |
90 | */ | |
91 | struct mx3_camera_dev { | |
4f67130a GL |
92 | /* |
93 | * i.MX3x is only supposed to handle one camera on its Camera Sensor | |
94 | * Interface. If anyone ever builds hardware to enable more than one | |
95 | * camera _simultaneously_, they will have to modify this driver too | |
96 | */ | |
97 | struct soc_camera_device *icd; | |
98 | struct clk *clk; | |
99 | ||
100 | void __iomem *base; | |
101 | ||
102 | struct mx3_camera_pdata *pdata; | |
103 | ||
104 | unsigned long platform_flags; | |
105 | unsigned long mclk; | |
106 | ||
107 | struct list_head capture; | |
108 | spinlock_t lock; /* Protects video buffer lists */ | |
109 | struct mx3_camera_buffer *active; | |
110 | ||
111 | /* IDMAC / dmaengine interface */ | |
112 | struct idmac_channel *idmac_channel[1]; /* We need one channel */ | |
113 | ||
114 | struct soc_camera_host soc_host; | |
115 | }; | |
116 | ||
117 | struct dma_chan_request { | |
118 | struct mx3_camera_dev *mx3_cam; | |
119 | enum ipu_channel id; | |
120 | }; | |
121 | ||
4f67130a GL |
122 | static u32 csi_reg_read(struct mx3_camera_dev *mx3, off_t reg) |
123 | { | |
124 | return __raw_readl(mx3->base + reg); | |
125 | } | |
126 | ||
127 | static void csi_reg_write(struct mx3_camera_dev *mx3, u32 value, off_t reg) | |
128 | { | |
129 | __raw_writel(value, mx3->base + reg); | |
130 | } | |
131 | ||
132 | /* Called from the IPU IDMAC ISR */ | |
133 | static void mx3_cam_dma_done(void *arg) | |
134 | { | |
135 | struct idmac_tx_desc *desc = to_tx_desc(arg); | |
136 | struct dma_chan *chan = desc->txd.chan; | |
137 | struct idmac_channel *ichannel = to_idmac_chan(chan); | |
138 | struct mx3_camera_dev *mx3_cam = ichannel->client; | |
139 | struct videobuf_buffer *vb; | |
140 | ||
141 | dev_dbg(chan->device->dev, "callback cookie %d, active DMA 0x%08x\n", | |
142 | desc->txd.cookie, mx3_cam->active ? sg_dma_address(&mx3_cam->active->sg) : 0); | |
143 | ||
144 | spin_lock(&mx3_cam->lock); | |
145 | if (mx3_cam->active) { | |
146 | vb = &mx3_cam->active->vb; | |
147 | ||
148 | list_del_init(&vb->queue); | |
149 | vb->state = VIDEOBUF_DONE; | |
150 | do_gettimeofday(&vb->ts); | |
151 | vb->field_count++; | |
152 | wake_up(&vb->done); | |
153 | } | |
154 | ||
155 | if (list_empty(&mx3_cam->capture)) { | |
156 | mx3_cam->active = NULL; | |
157 | spin_unlock(&mx3_cam->lock); | |
158 | ||
159 | /* | |
160 | * stop capture - without further buffers IPU_CHA_BUF0_RDY will | |
161 | * not get updated | |
162 | */ | |
163 | return; | |
164 | } | |
165 | ||
166 | mx3_cam->active = list_entry(mx3_cam->capture.next, | |
167 | struct mx3_camera_buffer, vb.queue); | |
168 | mx3_cam->active->vb.state = VIDEOBUF_ACTIVE; | |
169 | spin_unlock(&mx3_cam->lock); | |
170 | } | |
171 | ||
172 | static void free_buffer(struct videobuf_queue *vq, struct mx3_camera_buffer *buf) | |
173 | { | |
174 | struct soc_camera_device *icd = vq->priv_data; | |
175 | struct videobuf_buffer *vb = &buf->vb; | |
176 | struct dma_async_tx_descriptor *txd = buf->txd; | |
177 | struct idmac_channel *ichan; | |
178 | ||
179 | BUG_ON(in_interrupt()); | |
180 | ||
0166b743 | 181 | dev_dbg(icd->dev.parent, "%s (vb=0x%p) 0x%08lx %d\n", __func__, |
4f67130a GL |
182 | vb, vb->baddr, vb->bsize); |
183 | ||
184 | /* | |
185 | * This waits until this buffer is out of danger, i.e., until it is no | |
186 | * longer in STATE_QUEUED or STATE_ACTIVE | |
187 | */ | |
188 | videobuf_waiton(vb, 0, 0); | |
189 | if (txd) { | |
190 | ichan = to_idmac_chan(txd->chan); | |
191 | async_tx_ack(txd); | |
192 | } | |
193 | videobuf_dma_contig_free(vq, vb); | |
194 | buf->txd = NULL; | |
195 | ||
196 | vb->state = VIDEOBUF_NEEDS_INIT; | |
197 | } | |
198 | ||
199 | /* | |
200 | * Videobuf operations | |
201 | */ | |
202 | ||
203 | /* | |
204 | * Calculate the __buffer__ (not data) size and number of buffers. | |
205 | * Called with .vb_lock held | |
206 | */ | |
207 | static int mx3_videobuf_setup(struct videobuf_queue *vq, unsigned int *count, | |
208 | unsigned int *size) | |
209 | { | |
210 | struct soc_camera_device *icd = vq->priv_data; | |
211 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
212 | struct mx3_camera_dev *mx3_cam = ici->priv; | |
760697be GL |
213 | int bytes_per_line = soc_mbus_bytes_per_line(icd->user_width, |
214 | icd->current_fmt->host_fmt); | |
215 | ||
216 | if (bytes_per_line < 0) | |
217 | return bytes_per_line; | |
4f67130a GL |
218 | |
219 | if (!mx3_cam->idmac_channel[0]) | |
220 | return -EINVAL; | |
221 | ||
760697be | 222 | *size = bytes_per_line * icd->user_height; |
4f67130a GL |
223 | |
224 | if (!*count) | |
225 | *count = 32; | |
226 | ||
227 | if (*size * *count > MAX_VIDEO_MEM * 1024 * 1024) | |
228 | *count = MAX_VIDEO_MEM * 1024 * 1024 / *size; | |
229 | ||
230 | return 0; | |
231 | } | |
232 | ||
233 | /* Called with .vb_lock held */ | |
234 | static int mx3_videobuf_prepare(struct videobuf_queue *vq, | |
235 | struct videobuf_buffer *vb, enum v4l2_field field) | |
236 | { | |
237 | struct soc_camera_device *icd = vq->priv_data; | |
238 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
239 | struct mx3_camera_dev *mx3_cam = ici->priv; | |
240 | struct mx3_camera_buffer *buf = | |
241 | container_of(vb, struct mx3_camera_buffer, vb); | |
760697be | 242 | size_t new_size; |
4f67130a | 243 | int ret; |
760697be GL |
244 | int bytes_per_line = soc_mbus_bytes_per_line(icd->user_width, |
245 | icd->current_fmt->host_fmt); | |
246 | ||
247 | if (bytes_per_line < 0) | |
248 | return bytes_per_line; | |
249 | ||
250 | new_size = bytes_per_line * icd->user_height; | |
4f67130a GL |
251 | |
252 | /* | |
253 | * I think, in buf_prepare you only have to protect global data, | |
254 | * the actual buffer is yours | |
255 | */ | |
256 | ||
760697be | 257 | if (buf->code != icd->current_fmt->code || |
6a6c8786 GL |
258 | vb->width != icd->user_width || |
259 | vb->height != icd->user_height || | |
4f67130a | 260 | vb->field != field) { |
760697be | 261 | buf->code = icd->current_fmt->code; |
6a6c8786 GL |
262 | vb->width = icd->user_width; |
263 | vb->height = icd->user_height; | |
4f67130a GL |
264 | vb->field = field; |
265 | if (vb->state != VIDEOBUF_NEEDS_INIT) | |
266 | free_buffer(vq, buf); | |
267 | } | |
268 | ||
269 | if (vb->baddr && vb->bsize < new_size) { | |
270 | /* User provided buffer, but it is too small */ | |
271 | ret = -ENOMEM; | |
272 | goto out; | |
273 | } | |
274 | ||
275 | if (vb->state == VIDEOBUF_NEEDS_INIT) { | |
276 | struct idmac_channel *ichan = mx3_cam->idmac_channel[0]; | |
277 | struct scatterlist *sg = &buf->sg; | |
278 | ||
279 | /* | |
280 | * The total size of video-buffers that will be allocated / mapped. | |
281 | * *size that we calculated in videobuf_setup gets assigned to | |
282 | * vb->bsize, and now we use the same calculation to get vb->size. | |
283 | */ | |
284 | vb->size = new_size; | |
285 | ||
286 | /* This actually (allocates and) maps buffers */ | |
287 | ret = videobuf_iolock(vq, vb, NULL); | |
288 | if (ret) | |
289 | goto fail; | |
290 | ||
291 | /* | |
292 | * We will have to configure the IDMAC channel. It has two slots | |
293 | * for DMA buffers, we shall enter the first two buffers there, | |
294 | * and then submit new buffers in DMA-ready interrupts | |
295 | */ | |
296 | sg_init_table(sg, 1); | |
297 | sg_dma_address(sg) = videobuf_to_dma_contig(vb); | |
298 | sg_dma_len(sg) = vb->size; | |
299 | ||
300 | buf->txd = ichan->dma_chan.device->device_prep_slave_sg( | |
301 | &ichan->dma_chan, sg, 1, DMA_FROM_DEVICE, | |
302 | DMA_PREP_INTERRUPT); | |
303 | if (!buf->txd) { | |
304 | ret = -EIO; | |
305 | goto fail; | |
306 | } | |
307 | ||
308 | buf->txd->callback_param = buf->txd; | |
309 | buf->txd->callback = mx3_cam_dma_done; | |
310 | ||
311 | vb->state = VIDEOBUF_PREPARED; | |
312 | } | |
313 | ||
314 | return 0; | |
315 | ||
316 | fail: | |
317 | free_buffer(vq, buf); | |
318 | out: | |
319 | return ret; | |
320 | } | |
321 | ||
322 | static enum pixel_fmt fourcc_to_ipu_pix(__u32 fourcc) | |
323 | { | |
324 | /* Add more formats as need arises and test possibilities appear... */ | |
325 | switch (fourcc) { | |
326 | case V4L2_PIX_FMT_RGB565: | |
327 | return IPU_PIX_FMT_RGB565; | |
328 | case V4L2_PIX_FMT_RGB24: | |
329 | return IPU_PIX_FMT_RGB24; | |
330 | case V4L2_PIX_FMT_RGB332: | |
331 | return IPU_PIX_FMT_RGB332; | |
332 | case V4L2_PIX_FMT_YUV422P: | |
333 | return IPU_PIX_FMT_YVU422P; | |
334 | default: | |
335 | return IPU_PIX_FMT_GENERIC; | |
336 | } | |
337 | } | |
338 | ||
2dd54a54 GL |
339 | /* |
340 | * Called with .vb_lock mutex held and | |
341 | * under spinlock_irqsave(&mx3_cam->lock, ...) | |
342 | */ | |
4f67130a GL |
343 | static void mx3_videobuf_queue(struct videobuf_queue *vq, |
344 | struct videobuf_buffer *vb) | |
345 | { | |
346 | struct soc_camera_device *icd = vq->priv_data; | |
347 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
348 | struct mx3_camera_dev *mx3_cam = ici->priv; | |
349 | struct mx3_camera_buffer *buf = | |
350 | container_of(vb, struct mx3_camera_buffer, vb); | |
351 | struct dma_async_tx_descriptor *txd = buf->txd; | |
352 | struct idmac_channel *ichan = to_idmac_chan(txd->chan); | |
353 | struct idmac_video_param *video = &ichan->params.video; | |
4f67130a | 354 | dma_cookie_t cookie; |
760697be | 355 | u32 fourcc = icd->current_fmt->host_fmt->fourcc; |
2dd54a54 GL |
356 | |
357 | BUG_ON(!irqs_disabled()); | |
4f67130a GL |
358 | |
359 | /* This is the configuration of one sg-element */ | |
760697be | 360 | video->out_pixel_fmt = fourcc_to_ipu_pix(fourcc); |
6a6c8786 GL |
361 | video->out_width = icd->user_width; |
362 | video->out_height = icd->user_height; | |
363 | video->out_stride = icd->user_width; | |
4f67130a GL |
364 | |
365 | #ifdef DEBUG | |
366 | /* helps to see what DMA actually has written */ | |
367 | memset((void *)vb->baddr, 0xaa, vb->bsize); | |
368 | #endif | |
369 | ||
4f67130a GL |
370 | list_add_tail(&vb->queue, &mx3_cam->capture); |
371 | ||
372 | if (!mx3_cam->active) { | |
373 | mx3_cam->active = buf; | |
374 | vb->state = VIDEOBUF_ACTIVE; | |
375 | } else { | |
376 | vb->state = VIDEOBUF_QUEUED; | |
377 | } | |
378 | ||
2dd54a54 | 379 | spin_unlock_irq(&mx3_cam->lock); |
4f67130a GL |
380 | |
381 | cookie = txd->tx_submit(txd); | |
0166b743 GL |
382 | dev_dbg(icd->dev.parent, "Submitted cookie %d DMA 0x%08x\n", |
383 | cookie, sg_dma_address(&buf->sg)); | |
2dd54a54 GL |
384 | |
385 | spin_lock_irq(&mx3_cam->lock); | |
386 | ||
4f67130a GL |
387 | if (cookie >= 0) |
388 | return; | |
389 | ||
390 | /* Submit error */ | |
391 | vb->state = VIDEOBUF_PREPARED; | |
392 | ||
4f67130a GL |
393 | list_del_init(&vb->queue); |
394 | ||
395 | if (mx3_cam->active == buf) | |
396 | mx3_cam->active = NULL; | |
4f67130a GL |
397 | } |
398 | ||
399 | /* Called with .vb_lock held */ | |
400 | static void mx3_videobuf_release(struct videobuf_queue *vq, | |
401 | struct videobuf_buffer *vb) | |
402 | { | |
403 | struct soc_camera_device *icd = vq->priv_data; | |
404 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
405 | struct mx3_camera_dev *mx3_cam = ici->priv; | |
406 | struct mx3_camera_buffer *buf = | |
407 | container_of(vb, struct mx3_camera_buffer, vb); | |
408 | unsigned long flags; | |
409 | ||
0166b743 GL |
410 | dev_dbg(icd->dev.parent, |
411 | "Release%s DMA 0x%08x (state %d), queue %sempty\n", | |
4f67130a | 412 | mx3_cam->active == buf ? " active" : "", sg_dma_address(&buf->sg), |
0166b743 | 413 | vb->state, list_empty(&vb->queue) ? "" : "not "); |
4f67130a GL |
414 | spin_lock_irqsave(&mx3_cam->lock, flags); |
415 | if ((vb->state == VIDEOBUF_ACTIVE || vb->state == VIDEOBUF_QUEUED) && | |
416 | !list_empty(&vb->queue)) { | |
417 | vb->state = VIDEOBUF_ERROR; | |
418 | ||
419 | list_del_init(&vb->queue); | |
420 | if (mx3_cam->active == buf) | |
421 | mx3_cam->active = NULL; | |
422 | } | |
423 | spin_unlock_irqrestore(&mx3_cam->lock, flags); | |
424 | free_buffer(vq, buf); | |
425 | } | |
426 | ||
427 | static struct videobuf_queue_ops mx3_videobuf_ops = { | |
428 | .buf_setup = mx3_videobuf_setup, | |
429 | .buf_prepare = mx3_videobuf_prepare, | |
430 | .buf_queue = mx3_videobuf_queue, | |
431 | .buf_release = mx3_videobuf_release, | |
432 | }; | |
433 | ||
434 | static void mx3_camera_init_videobuf(struct videobuf_queue *q, | |
435 | struct soc_camera_device *icd) | |
436 | { | |
437 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
438 | struct mx3_camera_dev *mx3_cam = ici->priv; | |
439 | ||
979ea1dd | 440 | videobuf_queue_dma_contig_init(q, &mx3_videobuf_ops, icd->dev.parent, |
4f67130a GL |
441 | &mx3_cam->lock, |
442 | V4L2_BUF_TYPE_VIDEO_CAPTURE, | |
443 | V4L2_FIELD_NONE, | |
444 | sizeof(struct mx3_camera_buffer), icd); | |
445 | } | |
446 | ||
447 | /* First part of ipu_csi_init_interface() */ | |
448 | static void mx3_camera_activate(struct mx3_camera_dev *mx3_cam, | |
449 | struct soc_camera_device *icd) | |
450 | { | |
451 | u32 conf; | |
452 | long rate; | |
453 | ||
454 | /* Set default size: ipu_csi_set_window_size() */ | |
455 | csi_reg_write(mx3_cam, (640 - 1) | ((480 - 1) << 16), CSI_ACT_FRM_SIZE); | |
456 | /* ...and position to 0:0: ipu_csi_set_window_pos() */ | |
457 | conf = csi_reg_read(mx3_cam, CSI_OUT_FRM_CTRL) & 0xffff0000; | |
458 | csi_reg_write(mx3_cam, conf, CSI_OUT_FRM_CTRL); | |
459 | ||
460 | /* We use only gated clock synchronisation mode so far */ | |
461 | conf = 0 << CSI_SENS_CONF_SENS_PRTCL_SHIFT; | |
462 | ||
463 | /* Set generic data, platform-biggest bus-width */ | |
464 | conf |= CSI_SENS_CONF_DATA_FMT_BAYER; | |
465 | ||
466 | if (mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_15) | |
467 | conf |= 3 << CSI_SENS_CONF_DATA_WIDTH_SHIFT; | |
468 | else if (mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_10) | |
469 | conf |= 2 << CSI_SENS_CONF_DATA_WIDTH_SHIFT; | |
470 | else if (mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_8) | |
471 | conf |= 1 << CSI_SENS_CONF_DATA_WIDTH_SHIFT; | |
472 | else/* if (mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_4)*/ | |
473 | conf |= 0 << CSI_SENS_CONF_DATA_WIDTH_SHIFT; | |
474 | ||
475 | if (mx3_cam->platform_flags & MX3_CAMERA_CLK_SRC) | |
476 | conf |= 1 << CSI_SENS_CONF_SENS_CLKSRC_SHIFT; | |
477 | if (mx3_cam->platform_flags & MX3_CAMERA_EXT_VSYNC) | |
478 | conf |= 1 << CSI_SENS_CONF_EXT_VSYNC_SHIFT; | |
479 | if (mx3_cam->platform_flags & MX3_CAMERA_DP) | |
480 | conf |= 1 << CSI_SENS_CONF_DATA_POL_SHIFT; | |
481 | if (mx3_cam->platform_flags & MX3_CAMERA_PCP) | |
482 | conf |= 1 << CSI_SENS_CONF_PIX_CLK_POL_SHIFT; | |
483 | if (mx3_cam->platform_flags & MX3_CAMERA_HSP) | |
484 | conf |= 1 << CSI_SENS_CONF_HSYNC_POL_SHIFT; | |
485 | if (mx3_cam->platform_flags & MX3_CAMERA_VSP) | |
486 | conf |= 1 << CSI_SENS_CONF_VSYNC_POL_SHIFT; | |
487 | ||
488 | /* ipu_csi_init_interface() */ | |
489 | csi_reg_write(mx3_cam, conf, CSI_SENS_CONF); | |
490 | ||
491 | clk_enable(mx3_cam->clk); | |
492 | rate = clk_round_rate(mx3_cam->clk, mx3_cam->mclk); | |
0166b743 | 493 | dev_dbg(icd->dev.parent, "Set SENS_CONF to %x, rate %ld\n", conf, rate); |
4f67130a GL |
494 | if (rate) |
495 | clk_set_rate(mx3_cam->clk, rate); | |
496 | } | |
497 | ||
498 | /* Called with .video_lock held */ | |
499 | static int mx3_camera_add_device(struct soc_camera_device *icd) | |
500 | { | |
501 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
502 | struct mx3_camera_dev *mx3_cam = ici->priv; | |
4f67130a | 503 | |
979ea1dd GL |
504 | if (mx3_cam->icd) |
505 | return -EBUSY; | |
4f67130a GL |
506 | |
507 | mx3_camera_activate(mx3_cam, icd); | |
4f67130a GL |
508 | |
509 | mx3_cam->icd = icd; | |
510 | ||
0166b743 | 511 | dev_info(icd->dev.parent, "MX3 Camera driver attached to camera %d\n", |
40e2e092 GL |
512 | icd->devnum); |
513 | ||
514 | return 0; | |
4f67130a GL |
515 | } |
516 | ||
517 | /* Called with .video_lock held */ | |
518 | static void mx3_camera_remove_device(struct soc_camera_device *icd) | |
519 | { | |
520 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
521 | struct mx3_camera_dev *mx3_cam = ici->priv; | |
522 | struct idmac_channel **ichan = &mx3_cam->idmac_channel[0]; | |
523 | ||
524 | BUG_ON(icd != mx3_cam->icd); | |
525 | ||
526 | if (*ichan) { | |
527 | dma_release_channel(&(*ichan)->dma_chan); | |
528 | *ichan = NULL; | |
529 | } | |
530 | ||
4f67130a GL |
531 | clk_disable(mx3_cam->clk); |
532 | ||
533 | mx3_cam->icd = NULL; | |
534 | ||
0166b743 | 535 | dev_info(icd->dev.parent, "MX3 Camera driver detached from camera %d\n", |
4f67130a GL |
536 | icd->devnum); |
537 | } | |
538 | ||
539 | static bool channel_change_requested(struct soc_camera_device *icd, | |
09e231b3 | 540 | struct v4l2_rect *rect) |
4f67130a GL |
541 | { |
542 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
543 | struct mx3_camera_dev *mx3_cam = ici->priv; | |
544 | struct idmac_channel *ichan = mx3_cam->idmac_channel[0]; | |
545 | ||
09e231b3 | 546 | /* Do buffers have to be re-allocated or channel re-configured? */ |
a0705b07 | 547 | return ichan && rect->width * rect->height > |
6a6c8786 | 548 | icd->user_width * icd->user_height; |
4f67130a GL |
549 | } |
550 | ||
551 | static int test_platform_param(struct mx3_camera_dev *mx3_cam, | |
552 | unsigned char buswidth, unsigned long *flags) | |
553 | { | |
554 | /* | |
555 | * Platform specified synchronization and pixel clock polarities are | |
556 | * only a recommendation and are only used during probing. MX3x | |
557 | * camera interface only works in master mode, i.e., uses HSYNC and | |
558 | * VSYNC signals from the sensor | |
559 | */ | |
560 | *flags = SOCAM_MASTER | | |
561 | SOCAM_HSYNC_ACTIVE_HIGH | | |
562 | SOCAM_HSYNC_ACTIVE_LOW | | |
563 | SOCAM_VSYNC_ACTIVE_HIGH | | |
564 | SOCAM_VSYNC_ACTIVE_LOW | | |
565 | SOCAM_PCLK_SAMPLE_RISING | | |
566 | SOCAM_PCLK_SAMPLE_FALLING | | |
567 | SOCAM_DATA_ACTIVE_HIGH | | |
568 | SOCAM_DATA_ACTIVE_LOW; | |
569 | ||
5d28d525 GL |
570 | /* |
571 | * If requested data width is supported by the platform, use it or any | |
572 | * possible lower value - i.MX31 is smart enough to schift bits | |
573 | */ | |
760697be GL |
574 | if (mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_15) |
575 | *flags |= SOCAM_DATAWIDTH_15 | SOCAM_DATAWIDTH_10 | | |
576 | SOCAM_DATAWIDTH_8 | SOCAM_DATAWIDTH_4; | |
577 | else if (mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_10) | |
578 | *flags |= SOCAM_DATAWIDTH_10 | SOCAM_DATAWIDTH_8 | | |
579 | SOCAM_DATAWIDTH_4; | |
580 | else if (mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_8) | |
581 | *flags |= SOCAM_DATAWIDTH_8 | SOCAM_DATAWIDTH_4; | |
582 | else if (mx3_cam->platform_flags & MX3_CAMERA_DATAWIDTH_4) | |
583 | *flags |= SOCAM_DATAWIDTH_4; | |
584 | ||
4f67130a GL |
585 | switch (buswidth) { |
586 | case 15: | |
760697be | 587 | if (!(*flags & SOCAM_DATAWIDTH_15)) |
4f67130a | 588 | return -EINVAL; |
4f67130a GL |
589 | break; |
590 | case 10: | |
760697be | 591 | if (!(*flags & SOCAM_DATAWIDTH_10)) |
4f67130a | 592 | return -EINVAL; |
4f67130a GL |
593 | break; |
594 | case 8: | |
760697be | 595 | if (!(*flags & SOCAM_DATAWIDTH_8)) |
4f67130a | 596 | return -EINVAL; |
4f67130a GL |
597 | break; |
598 | case 4: | |
760697be | 599 | if (!(*flags & SOCAM_DATAWIDTH_4)) |
4f67130a | 600 | return -EINVAL; |
4f67130a GL |
601 | break; |
602 | default: | |
6a6c8786 GL |
603 | dev_warn(mx3_cam->soc_host.v4l2_dev.dev, |
604 | "Unsupported bus width %d\n", buswidth); | |
4f67130a GL |
605 | return -EINVAL; |
606 | } | |
607 | ||
608 | return 0; | |
609 | } | |
610 | ||
611 | static int mx3_camera_try_bus_param(struct soc_camera_device *icd, | |
612 | const unsigned int depth) | |
613 | { | |
614 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
615 | struct mx3_camera_dev *mx3_cam = ici->priv; | |
616 | unsigned long bus_flags, camera_flags; | |
617 | int ret = test_platform_param(mx3_cam, depth, &bus_flags); | |
618 | ||
6a6c8786 | 619 | dev_dbg(icd->dev.parent, "request bus width %d bit: %d\n", depth, ret); |
4f67130a GL |
620 | |
621 | if (ret < 0) | |
622 | return ret; | |
623 | ||
624 | camera_flags = icd->ops->query_bus_param(icd); | |
625 | ||
626 | ret = soc_camera_bus_param_compatible(camera_flags, bus_flags); | |
627 | if (ret < 0) | |
0166b743 GL |
628 | dev_warn(icd->dev.parent, |
629 | "Flags incompatible: camera %lx, host %lx\n", | |
4f67130a GL |
630 | camera_flags, bus_flags); |
631 | ||
632 | return ret; | |
633 | } | |
634 | ||
635 | static bool chan_filter(struct dma_chan *chan, void *arg) | |
636 | { | |
637 | struct dma_chan_request *rq = arg; | |
638 | struct mx3_camera_pdata *pdata; | |
639 | ||
640 | if (!rq) | |
641 | return false; | |
642 | ||
979ea1dd | 643 | pdata = rq->mx3_cam->soc_host.v4l2_dev.dev->platform_data; |
4f67130a GL |
644 | |
645 | return rq->id == chan->chan_id && | |
646 | pdata->dma_dev == chan->device->dev; | |
647 | } | |
648 | ||
760697be | 649 | static const struct soc_mbus_pixelfmt mx3_camera_formats[] = { |
4f67130a | 650 | { |
760697be GL |
651 | .fourcc = V4L2_PIX_FMT_SBGGR8, |
652 | .name = "Bayer BGGR (sRGB) 8 bit", | |
653 | .bits_per_sample = 8, | |
654 | .packing = SOC_MBUS_PACKING_NONE, | |
655 | .order = SOC_MBUS_ORDER_LE, | |
4f67130a | 656 | }, { |
760697be GL |
657 | .fourcc = V4L2_PIX_FMT_GREY, |
658 | .name = "Monochrome 8 bit", | |
659 | .bits_per_sample = 8, | |
660 | .packing = SOC_MBUS_PACKING_NONE, | |
661 | .order = SOC_MBUS_ORDER_LE, | |
4f67130a GL |
662 | }, |
663 | }; | |
664 | ||
760697be GL |
665 | /* This will be corrected as we get more formats */ |
666 | static bool mx3_camera_packing_supported(const struct soc_mbus_pixelfmt *fmt) | |
4f67130a | 667 | { |
760697be GL |
668 | return fmt->packing == SOC_MBUS_PACKING_NONE || |
669 | (fmt->bits_per_sample == 8 && | |
670 | fmt->packing == SOC_MBUS_PACKING_2X8_PADHI) || | |
671 | (fmt->bits_per_sample > 8 && | |
672 | fmt->packing == SOC_MBUS_PACKING_EXTEND16); | |
4f67130a GL |
673 | } |
674 | ||
3805f201 | 675 | static int mx3_camera_get_formats(struct soc_camera_device *icd, unsigned int idx, |
4f67130a GL |
676 | struct soc_camera_format_xlate *xlate) |
677 | { | |
760697be GL |
678 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
679 | struct device *dev = icd->dev.parent; | |
680 | int formats = 0, ret; | |
681 | enum v4l2_mbus_pixelcode code; | |
682 | const struct soc_mbus_pixelfmt *fmt; | |
4f67130a | 683 | |
760697be GL |
684 | ret = v4l2_subdev_call(sd, video, enum_mbus_fmt, idx, &code); |
685 | if (ret < 0) | |
686 | /* No more formats */ | |
687 | return 0; | |
4f67130a | 688 | |
760697be GL |
689 | fmt = soc_mbus_get_fmtdesc(code); |
690 | if (!fmt) { | |
691 | dev_err(icd->dev.parent, | |
3805f201 | 692 | "Invalid format code #%u: %d\n", idx, code); |
4f67130a | 693 | return 0; |
760697be | 694 | } |
4f67130a | 695 | |
760697be GL |
696 | /* This also checks support for the requested bits-per-sample */ |
697 | ret = mx3_camera_try_bus_param(icd, fmt->bits_per_sample); | |
4f67130a GL |
698 | if (ret < 0) |
699 | return 0; | |
700 | ||
760697be GL |
701 | switch (code) { |
702 | case V4L2_MBUS_FMT_SBGGR10_1X10: | |
4f67130a GL |
703 | formats++; |
704 | if (xlate) { | |
760697be GL |
705 | xlate->host_fmt = &mx3_camera_formats[0]; |
706 | xlate->code = code; | |
4f67130a | 707 | xlate++; |
760697be GL |
708 | dev_dbg(dev, "Providing format %s using code %d\n", |
709 | mx3_camera_formats[0].name, code); | |
4f67130a | 710 | } |
760697be GL |
711 | break; |
712 | case V4L2_MBUS_FMT_Y10_1X10: | |
4f67130a GL |
713 | formats++; |
714 | if (xlate) { | |
760697be GL |
715 | xlate->host_fmt = &mx3_camera_formats[1]; |
716 | xlate->code = code; | |
4f67130a | 717 | xlate++; |
760697be GL |
718 | dev_dbg(dev, "Providing format %s using code %d\n", |
719 | mx3_camera_formats[1].name, code); | |
4f67130a | 720 | } |
760697be | 721 | break; |
4f67130a | 722 | default: |
760697be GL |
723 | if (!mx3_camera_packing_supported(fmt)) |
724 | return 0; | |
725 | } | |
726 | ||
727 | /* Generic pass-through */ | |
728 | formats++; | |
729 | if (xlate) { | |
730 | xlate->host_fmt = fmt; | |
731 | xlate->code = code; | |
732 | xlate++; | |
733 | dev_dbg(dev, "Providing format %x in pass-through mode\n", | |
734 | xlate->host_fmt->fourcc); | |
4f67130a GL |
735 | } |
736 | ||
737 | return formats; | |
738 | } | |
739 | ||
09e231b3 | 740 | static void configure_geometry(struct mx3_camera_dev *mx3_cam, |
6a6c8786 | 741 | unsigned int width, unsigned int height) |
4f67130a | 742 | { |
4f67130a | 743 | u32 ctrl, width_field, height_field; |
4f67130a GL |
744 | |
745 | /* Setup frame size - this cannot be changed on-the-fly... */ | |
6a6c8786 GL |
746 | width_field = width - 1; |
747 | height_field = height - 1; | |
4f67130a GL |
748 | csi_reg_write(mx3_cam, width_field | (height_field << 16), CSI_SENS_FRM_SIZE); |
749 | ||
750 | csi_reg_write(mx3_cam, width_field << 16, CSI_FLASH_STROBE_1); | |
751 | csi_reg_write(mx3_cam, (height_field << 16) | 0x22, CSI_FLASH_STROBE_2); | |
752 | ||
753 | csi_reg_write(mx3_cam, width_field | (height_field << 16), CSI_ACT_FRM_SIZE); | |
754 | ||
755 | /* ...and position */ | |
756 | ctrl = csi_reg_read(mx3_cam, CSI_OUT_FRM_CTRL) & 0xffff0000; | |
757 | /* Sensor does the cropping */ | |
758 | csi_reg_write(mx3_cam, ctrl | 0 | (0 << 8), CSI_OUT_FRM_CTRL); | |
09e231b3 GL |
759 | } |
760 | ||
761 | static int acquire_dma_channel(struct mx3_camera_dev *mx3_cam) | |
762 | { | |
763 | dma_cap_mask_t mask; | |
764 | struct dma_chan *chan; | |
765 | struct idmac_channel **ichan = &mx3_cam->idmac_channel[0]; | |
766 | /* We have to use IDMAC_IC_7 for Bayer / generic data */ | |
767 | struct dma_chan_request rq = {.mx3_cam = mx3_cam, | |
768 | .id = IDMAC_IC_7}; | |
769 | ||
770 | if (*ichan) { | |
771 | struct videobuf_buffer *vb, *_vb; | |
772 | dma_release_channel(&(*ichan)->dma_chan); | |
773 | *ichan = NULL; | |
774 | mx3_cam->active = NULL; | |
775 | list_for_each_entry_safe(vb, _vb, &mx3_cam->capture, queue) { | |
776 | list_del_init(&vb->queue); | |
777 | vb->state = VIDEOBUF_ERROR; | |
778 | wake_up(&vb->done); | |
779 | } | |
780 | } | |
781 | ||
782 | dma_cap_zero(mask); | |
783 | dma_cap_set(DMA_SLAVE, mask); | |
784 | dma_cap_set(DMA_PRIVATE, mask); | |
785 | chan = dma_request_channel(mask, chan_filter, &rq); | |
786 | if (!chan) | |
787 | return -EBUSY; | |
788 | ||
789 | *ichan = to_idmac_chan(chan); | |
790 | (*ichan)->client = mx3_cam; | |
791 | ||
792 | return 0; | |
793 | } | |
794 | ||
6a6c8786 GL |
795 | /* |
796 | * FIXME: learn to use stride != width, then we can keep stride properly aligned | |
797 | * and support arbitrary (even) widths. | |
798 | */ | |
e26b3144 | 799 | static inline void stride_align(__u32 *width) |
6a6c8786 GL |
800 | { |
801 | if (((*width + 7) & ~7) < 4096) | |
802 | *width = (*width + 7) & ~7; | |
803 | else | |
804 | *width = *width & ~7; | |
805 | } | |
806 | ||
807 | /* | |
808 | * As long as we don't implement host-side cropping and scaling, we can use | |
809 | * default g_crop and cropcap from soc_camera.c | |
810 | */ | |
09e231b3 | 811 | static int mx3_camera_set_crop(struct soc_camera_device *icd, |
08590b96 | 812 | struct v4l2_crop *a) |
09e231b3 | 813 | { |
08590b96 | 814 | struct v4l2_rect *rect = &a->c; |
09e231b3 GL |
815 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
816 | struct mx3_camera_dev *mx3_cam = ici->priv; | |
c9c1f1c0 | 817 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
760697be | 818 | struct v4l2_mbus_framefmt mf; |
6a6c8786 | 819 | int ret; |
09e231b3 | 820 | |
6a6c8786 GL |
821 | soc_camera_limit_side(&rect->left, &rect->width, 0, 2, 4096); |
822 | soc_camera_limit_side(&rect->top, &rect->height, 0, 2, 4096); | |
823 | ||
824 | ret = v4l2_subdev_call(sd, video, s_crop, a); | |
825 | if (ret < 0) | |
826 | return ret; | |
827 | ||
828 | /* The capture device might have changed its output */ | |
760697be | 829 | ret = v4l2_subdev_call(sd, video, g_mbus_fmt, &mf); |
6a6c8786 GL |
830 | if (ret < 0) |
831 | return ret; | |
832 | ||
760697be | 833 | if (mf.width & 7) { |
6a6c8786 | 834 | /* Ouch! We can only handle 8-byte aligned width... */ |
760697be GL |
835 | stride_align(&mf.width); |
836 | ret = v4l2_subdev_call(sd, video, s_mbus_fmt, &mf); | |
09e231b3 GL |
837 | if (ret < 0) |
838 | return ret; | |
839 | } | |
840 | ||
760697be | 841 | if (mf.width != icd->user_width || mf.height != icd->user_height) { |
6a6c8786 GL |
842 | /* |
843 | * We now know pixel formats and can decide upon DMA-channel(s) | |
844 | * So far only direct camera-to-memory is supported | |
845 | */ | |
846 | if (channel_change_requested(icd, rect)) { | |
e26b3144 | 847 | ret = acquire_dma_channel(mx3_cam); |
6a6c8786 GL |
848 | if (ret < 0) |
849 | return ret; | |
850 | } | |
09e231b3 | 851 | |
760697be | 852 | configure_geometry(mx3_cam, mf.width, mf.height); |
6a6c8786 GL |
853 | } |
854 | ||
855 | dev_dbg(icd->dev.parent, "Sensor cropped %dx%d\n", | |
760697be | 856 | mf.width, mf.height); |
6a6c8786 | 857 | |
760697be GL |
858 | icd->user_width = mf.width; |
859 | icd->user_height = mf.height; | |
6a6c8786 GL |
860 | |
861 | return ret; | |
09e231b3 GL |
862 | } |
863 | ||
864 | static int mx3_camera_set_fmt(struct soc_camera_device *icd, | |
865 | struct v4l2_format *f) | |
866 | { | |
867 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
868 | struct mx3_camera_dev *mx3_cam = ici->priv; | |
c9c1f1c0 | 869 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
09e231b3 GL |
870 | const struct soc_camera_format_xlate *xlate; |
871 | struct v4l2_pix_format *pix = &f->fmt.pix; | |
760697be | 872 | struct v4l2_mbus_framefmt mf; |
09e231b3 GL |
873 | int ret; |
874 | ||
875 | xlate = soc_camera_xlate_by_fourcc(icd, pix->pixelformat); | |
876 | if (!xlate) { | |
0166b743 GL |
877 | dev_warn(icd->dev.parent, "Format %x not found\n", |
878 | pix->pixelformat); | |
09e231b3 GL |
879 | return -EINVAL; |
880 | } | |
881 | ||
6a6c8786 GL |
882 | stride_align(&pix->width); |
883 | dev_dbg(icd->dev.parent, "Set format %dx%d\n", pix->width, pix->height); | |
884 | ||
09e231b3 GL |
885 | ret = acquire_dma_channel(mx3_cam); |
886 | if (ret < 0) | |
887 | return ret; | |
888 | ||
889 | /* | |
890 | * Might have to perform a complete interface initialisation like in | |
891 | * ipu_csi_init_interface() in mxc_v4l2_s_param(). Also consider | |
892 | * mxc_v4l2_s_fmt() | |
893 | */ | |
894 | ||
6a6c8786 | 895 | configure_geometry(mx3_cam, pix->width, pix->height); |
4f67130a | 896 | |
760697be GL |
897 | mf.width = pix->width; |
898 | mf.height = pix->height; | |
899 | mf.field = pix->field; | |
900 | mf.colorspace = pix->colorspace; | |
901 | mf.code = xlate->code; | |
902 | ||
903 | ret = v4l2_subdev_call(sd, video, s_mbus_fmt, &mf); | |
904 | if (ret < 0) | |
905 | return ret; | |
906 | ||
907 | if (mf.code != xlate->code) | |
908 | return -EINVAL; | |
909 | ||
910 | pix->width = mf.width; | |
911 | pix->height = mf.height; | |
912 | pix->field = mf.field; | |
913 | pix->colorspace = mf.colorspace; | |
914 | icd->current_fmt = xlate; | |
4f67130a | 915 | |
6a6c8786 GL |
916 | dev_dbg(icd->dev.parent, "Sensor set %dx%d\n", pix->width, pix->height); |
917 | ||
4f67130a GL |
918 | return ret; |
919 | } | |
920 | ||
921 | static int mx3_camera_try_fmt(struct soc_camera_device *icd, | |
922 | struct v4l2_format *f) | |
923 | { | |
c9c1f1c0 | 924 | struct v4l2_subdev *sd = soc_camera_to_subdev(icd); |
4f67130a GL |
925 | const struct soc_camera_format_xlate *xlate; |
926 | struct v4l2_pix_format *pix = &f->fmt.pix; | |
760697be | 927 | struct v4l2_mbus_framefmt mf; |
4f67130a | 928 | __u32 pixfmt = pix->pixelformat; |
4f67130a GL |
929 | int ret; |
930 | ||
931 | xlate = soc_camera_xlate_by_fourcc(icd, pixfmt); | |
932 | if (pixfmt && !xlate) { | |
979ea1dd | 933 | dev_warn(icd->dev.parent, "Format %x not found\n", pixfmt); |
4f67130a GL |
934 | return -EINVAL; |
935 | } | |
936 | ||
937 | /* limit to MX3 hardware capabilities */ | |
938 | if (pix->height > 4096) | |
939 | pix->height = 4096; | |
940 | if (pix->width > 4096) | |
941 | pix->width = 4096; | |
942 | ||
760697be GL |
943 | pix->bytesperline = soc_mbus_bytes_per_line(pix->width, |
944 | xlate->host_fmt); | |
945 | if (pix->bytesperline < 0) | |
946 | return pix->bytesperline; | |
4f67130a GL |
947 | pix->sizeimage = pix->height * pix->bytesperline; |
948 | ||
4f67130a | 949 | /* limit to sensor capabilities */ |
760697be GL |
950 | mf.width = pix->width; |
951 | mf.height = pix->height; | |
952 | mf.field = pix->field; | |
953 | mf.colorspace = pix->colorspace; | |
954 | mf.code = xlate->code; | |
4f67130a | 955 | |
760697be GL |
956 | ret = v4l2_subdev_call(sd, video, try_mbus_fmt, &mf); |
957 | if (ret < 0) | |
958 | return ret; | |
4f67130a | 959 | |
760697be GL |
960 | pix->width = mf.width; |
961 | pix->height = mf.height; | |
962 | pix->colorspace = mf.colorspace; | |
963 | ||
964 | switch (mf.field) { | |
965 | case V4L2_FIELD_ANY: | |
4f67130a | 966 | pix->field = V4L2_FIELD_NONE; |
760697be GL |
967 | break; |
968 | case V4L2_FIELD_NONE: | |
969 | break; | |
970 | default: | |
971 | dev_err(icd->dev.parent, "Field type %d unsupported.\n", | |
972 | mf.field); | |
973 | ret = -EINVAL; | |
4f67130a GL |
974 | } |
975 | ||
976 | return ret; | |
977 | } | |
978 | ||
979 | static int mx3_camera_reqbufs(struct soc_camera_file *icf, | |
980 | struct v4l2_requestbuffers *p) | |
981 | { | |
982 | return 0; | |
983 | } | |
984 | ||
985 | static unsigned int mx3_camera_poll(struct file *file, poll_table *pt) | |
986 | { | |
987 | struct soc_camera_file *icf = file->private_data; | |
988 | ||
989 | return videobuf_poll_stream(file, &icf->vb_vidq, pt); | |
990 | } | |
991 | ||
992 | static int mx3_camera_querycap(struct soc_camera_host *ici, | |
993 | struct v4l2_capability *cap) | |
994 | { | |
995 | /* cap->name is set by the firendly caller:-> */ | |
996 | strlcpy(cap->card, "i.MX3x Camera", sizeof(cap->card)); | |
997 | cap->version = KERNEL_VERSION(0, 2, 2); | |
998 | cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; | |
999 | ||
1000 | return 0; | |
1001 | } | |
1002 | ||
1003 | static int mx3_camera_set_bus_param(struct soc_camera_device *icd, __u32 pixfmt) | |
1004 | { | |
1005 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); | |
1006 | struct mx3_camera_dev *mx3_cam = ici->priv; | |
1007 | unsigned long bus_flags, camera_flags, common_flags; | |
1008 | u32 dw, sens_conf; | |
760697be GL |
1009 | const struct soc_mbus_pixelfmt *fmt; |
1010 | int buswidth; | |
1011 | int ret; | |
4f67130a | 1012 | const struct soc_camera_format_xlate *xlate; |
0166b743 | 1013 | struct device *dev = icd->dev.parent; |
4f67130a | 1014 | |
760697be GL |
1015 | fmt = soc_mbus_get_fmtdesc(icd->current_fmt->code); |
1016 | if (!fmt) | |
1017 | return -EINVAL; | |
1018 | ||
1019 | buswidth = fmt->bits_per_sample; | |
1020 | ret = test_platform_param(mx3_cam, buswidth, &bus_flags); | |
1021 | ||
4f67130a GL |
1022 | xlate = soc_camera_xlate_by_fourcc(icd, pixfmt); |
1023 | if (!xlate) { | |
0166b743 | 1024 | dev_warn(dev, "Format %x not found\n", pixfmt); |
4f67130a GL |
1025 | return -EINVAL; |
1026 | } | |
1027 | ||
760697be | 1028 | dev_dbg(dev, "requested bus width %d bit: %d\n", buswidth, ret); |
4f67130a GL |
1029 | |
1030 | if (ret < 0) | |
1031 | return ret; | |
1032 | ||
1033 | camera_flags = icd->ops->query_bus_param(icd); | |
1034 | ||
1035 | common_flags = soc_camera_bus_param_compatible(camera_flags, bus_flags); | |
0166b743 | 1036 | dev_dbg(dev, "Flags cam: 0x%lx host: 0x%lx common: 0x%lx\n", |
40e2e092 | 1037 | camera_flags, bus_flags, common_flags); |
4f67130a | 1038 | if (!common_flags) { |
0166b743 | 1039 | dev_dbg(dev, "no common flags"); |
4f67130a GL |
1040 | return -EINVAL; |
1041 | } | |
1042 | ||
1043 | /* Make choices, based on platform preferences */ | |
1044 | if ((common_flags & SOCAM_HSYNC_ACTIVE_HIGH) && | |
1045 | (common_flags & SOCAM_HSYNC_ACTIVE_LOW)) { | |
1046 | if (mx3_cam->platform_flags & MX3_CAMERA_HSP) | |
1047 | common_flags &= ~SOCAM_HSYNC_ACTIVE_HIGH; | |
1048 | else | |
1049 | common_flags &= ~SOCAM_HSYNC_ACTIVE_LOW; | |
1050 | } | |
1051 | ||
1052 | if ((common_flags & SOCAM_VSYNC_ACTIVE_HIGH) && | |
1053 | (common_flags & SOCAM_VSYNC_ACTIVE_LOW)) { | |
1054 | if (mx3_cam->platform_flags & MX3_CAMERA_VSP) | |
1055 | common_flags &= ~SOCAM_VSYNC_ACTIVE_HIGH; | |
1056 | else | |
1057 | common_flags &= ~SOCAM_VSYNC_ACTIVE_LOW; | |
1058 | } | |
1059 | ||
1060 | if ((common_flags & SOCAM_DATA_ACTIVE_HIGH) && | |
1061 | (common_flags & SOCAM_DATA_ACTIVE_LOW)) { | |
1062 | if (mx3_cam->platform_flags & MX3_CAMERA_DP) | |
1063 | common_flags &= ~SOCAM_DATA_ACTIVE_HIGH; | |
1064 | else | |
1065 | common_flags &= ~SOCAM_DATA_ACTIVE_LOW; | |
1066 | } | |
1067 | ||
1068 | if ((common_flags & SOCAM_PCLK_SAMPLE_RISING) && | |
1069 | (common_flags & SOCAM_PCLK_SAMPLE_FALLING)) { | |
1070 | if (mx3_cam->platform_flags & MX3_CAMERA_PCP) | |
1071 | common_flags &= ~SOCAM_PCLK_SAMPLE_RISING; | |
1072 | else | |
1073 | common_flags &= ~SOCAM_PCLK_SAMPLE_FALLING; | |
1074 | } | |
1075 | ||
5d28d525 GL |
1076 | /* |
1077 | * Make the camera work in widest common mode, we'll take care of | |
1078 | * the rest | |
1079 | */ | |
4f67130a GL |
1080 | if (common_flags & SOCAM_DATAWIDTH_15) |
1081 | common_flags = (common_flags & ~SOCAM_DATAWIDTH_MASK) | | |
1082 | SOCAM_DATAWIDTH_15; | |
1083 | else if (common_flags & SOCAM_DATAWIDTH_10) | |
1084 | common_flags = (common_flags & ~SOCAM_DATAWIDTH_MASK) | | |
1085 | SOCAM_DATAWIDTH_10; | |
1086 | else if (common_flags & SOCAM_DATAWIDTH_8) | |
1087 | common_flags = (common_flags & ~SOCAM_DATAWIDTH_MASK) | | |
1088 | SOCAM_DATAWIDTH_8; | |
1089 | else | |
1090 | common_flags = (common_flags & ~SOCAM_DATAWIDTH_MASK) | | |
1091 | SOCAM_DATAWIDTH_4; | |
1092 | ||
1093 | ret = icd->ops->set_bus_param(icd, common_flags); | |
40e2e092 | 1094 | if (ret < 0) { |
0166b743 | 1095 | dev_dbg(dev, "camera set_bus_param(%lx) returned %d\n", |
40e2e092 | 1096 | common_flags, ret); |
4f67130a | 1097 | return ret; |
40e2e092 | 1098 | } |
4f67130a GL |
1099 | |
1100 | /* | |
1101 | * So far only gated clock mode is supported. Add a line | |
1102 | * (3 << CSI_SENS_CONF_SENS_PRTCL_SHIFT) | | |
1103 | * below and select the required mode when supporting other | |
1104 | * synchronisation protocols. | |
1105 | */ | |
1106 | sens_conf = csi_reg_read(mx3_cam, CSI_SENS_CONF) & | |
1107 | ~((1 << CSI_SENS_CONF_VSYNC_POL_SHIFT) | | |
1108 | (1 << CSI_SENS_CONF_HSYNC_POL_SHIFT) | | |
1109 | (1 << CSI_SENS_CONF_DATA_POL_SHIFT) | | |
1110 | (1 << CSI_SENS_CONF_PIX_CLK_POL_SHIFT) | | |
1111 | (3 << CSI_SENS_CONF_DATA_FMT_SHIFT) | | |
1112 | (3 << CSI_SENS_CONF_DATA_WIDTH_SHIFT)); | |
1113 | ||
1114 | /* TODO: Support RGB and YUV formats */ | |
1115 | ||
1116 | /* This has been set in mx3_camera_activate(), but we clear it above */ | |
1117 | sens_conf |= CSI_SENS_CONF_DATA_FMT_BAYER; | |
1118 | ||
1119 | if (common_flags & SOCAM_PCLK_SAMPLE_FALLING) | |
1120 | sens_conf |= 1 << CSI_SENS_CONF_PIX_CLK_POL_SHIFT; | |
1121 | if (common_flags & SOCAM_HSYNC_ACTIVE_LOW) | |
1122 | sens_conf |= 1 << CSI_SENS_CONF_HSYNC_POL_SHIFT; | |
1123 | if (common_flags & SOCAM_VSYNC_ACTIVE_LOW) | |
1124 | sens_conf |= 1 << CSI_SENS_CONF_VSYNC_POL_SHIFT; | |
1125 | if (common_flags & SOCAM_DATA_ACTIVE_LOW) | |
1126 | sens_conf |= 1 << CSI_SENS_CONF_DATA_POL_SHIFT; | |
1127 | ||
1128 | /* Just do what we're asked to do */ | |
760697be | 1129 | switch (xlate->host_fmt->bits_per_sample) { |
4f67130a GL |
1130 | case 4: |
1131 | dw = 0 << CSI_SENS_CONF_DATA_WIDTH_SHIFT; | |
1132 | break; | |
1133 | case 8: | |
1134 | dw = 1 << CSI_SENS_CONF_DATA_WIDTH_SHIFT; | |
1135 | break; | |
1136 | case 10: | |
1137 | dw = 2 << CSI_SENS_CONF_DATA_WIDTH_SHIFT; | |
1138 | break; | |
1139 | default: | |
1140 | /* | |
1141 | * Actually it can only be 15 now, default is just to silence | |
1142 | * compiler warnings | |
1143 | */ | |
1144 | case 15: | |
1145 | dw = 3 << CSI_SENS_CONF_DATA_WIDTH_SHIFT; | |
1146 | } | |
1147 | ||
1148 | csi_reg_write(mx3_cam, sens_conf | dw, CSI_SENS_CONF); | |
1149 | ||
0166b743 | 1150 | dev_dbg(dev, "Set SENS_CONF to %x\n", sens_conf | dw); |
4f67130a GL |
1151 | |
1152 | return 0; | |
1153 | } | |
1154 | ||
1155 | static struct soc_camera_host_ops mx3_soc_camera_host_ops = { | |
1156 | .owner = THIS_MODULE, | |
1157 | .add = mx3_camera_add_device, | |
1158 | .remove = mx3_camera_remove_device, | |
09e231b3 | 1159 | .set_crop = mx3_camera_set_crop, |
4f67130a GL |
1160 | .set_fmt = mx3_camera_set_fmt, |
1161 | .try_fmt = mx3_camera_try_fmt, | |
1162 | .get_formats = mx3_camera_get_formats, | |
1163 | .init_videobuf = mx3_camera_init_videobuf, | |
1164 | .reqbufs = mx3_camera_reqbufs, | |
1165 | .poll = mx3_camera_poll, | |
1166 | .querycap = mx3_camera_querycap, | |
1167 | .set_bus_param = mx3_camera_set_bus_param, | |
1168 | }; | |
1169 | ||
e36bc31f | 1170 | static int __devinit mx3_camera_probe(struct platform_device *pdev) |
4f67130a GL |
1171 | { |
1172 | struct mx3_camera_dev *mx3_cam; | |
1173 | struct resource *res; | |
1174 | void __iomem *base; | |
1175 | int err = 0; | |
1176 | struct soc_camera_host *soc_host; | |
1177 | ||
1178 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1179 | if (!res) { | |
1180 | err = -ENODEV; | |
1181 | goto egetres; | |
1182 | } | |
1183 | ||
1184 | mx3_cam = vmalloc(sizeof(*mx3_cam)); | |
1185 | if (!mx3_cam) { | |
1186 | dev_err(&pdev->dev, "Could not allocate mx3 camera object\n"); | |
1187 | err = -ENOMEM; | |
1188 | goto ealloc; | |
1189 | } | |
1190 | memset(mx3_cam, 0, sizeof(*mx3_cam)); | |
1191 | ||
b71df97a | 1192 | mx3_cam->clk = clk_get(&pdev->dev, NULL); |
4f67130a GL |
1193 | if (IS_ERR(mx3_cam->clk)) { |
1194 | err = PTR_ERR(mx3_cam->clk); | |
1195 | goto eclkget; | |
1196 | } | |
1197 | ||
4f67130a GL |
1198 | mx3_cam->pdata = pdev->dev.platform_data; |
1199 | mx3_cam->platform_flags = mx3_cam->pdata->flags; | |
1200 | if (!(mx3_cam->platform_flags & (MX3_CAMERA_DATAWIDTH_4 | | |
1201 | MX3_CAMERA_DATAWIDTH_8 | MX3_CAMERA_DATAWIDTH_10 | | |
1202 | MX3_CAMERA_DATAWIDTH_15))) { | |
5d28d525 GL |
1203 | /* |
1204 | * Platform hasn't set available data widths. This is bad. | |
1205 | * Warn and use a default. | |
1206 | */ | |
4f67130a GL |
1207 | dev_warn(&pdev->dev, "WARNING! Platform hasn't set available " |
1208 | "data widths, using default 8 bit\n"); | |
1209 | mx3_cam->platform_flags |= MX3_CAMERA_DATAWIDTH_8; | |
1210 | } | |
1211 | ||
1212 | mx3_cam->mclk = mx3_cam->pdata->mclk_10khz * 10000; | |
1213 | if (!mx3_cam->mclk) { | |
1214 | dev_warn(&pdev->dev, | |
1215 | "mclk_10khz == 0! Please, fix your platform data. " | |
1216 | "Using default 20MHz\n"); | |
1217 | mx3_cam->mclk = 20000000; | |
1218 | } | |
1219 | ||
1220 | /* list of video-buffers */ | |
1221 | INIT_LIST_HEAD(&mx3_cam->capture); | |
1222 | spin_lock_init(&mx3_cam->lock); | |
1223 | ||
40e2e092 | 1224 | base = ioremap(res->start, resource_size(res)); |
4f67130a | 1225 | if (!base) { |
40e2e092 | 1226 | pr_err("Couldn't map %x@%x\n", resource_size(res), res->start); |
4f67130a GL |
1227 | err = -ENOMEM; |
1228 | goto eioremap; | |
1229 | } | |
1230 | ||
1231 | mx3_cam->base = base; | |
4f67130a GL |
1232 | |
1233 | soc_host = &mx3_cam->soc_host; | |
1234 | soc_host->drv_name = MX3_CAM_DRV_NAME; | |
1235 | soc_host->ops = &mx3_soc_camera_host_ops; | |
1236 | soc_host->priv = mx3_cam; | |
979ea1dd | 1237 | soc_host->v4l2_dev.dev = &pdev->dev; |
4f67130a | 1238 | soc_host->nr = pdev->id; |
eff505fa | 1239 | |
4f67130a GL |
1240 | err = soc_camera_host_register(soc_host); |
1241 | if (err) | |
1242 | goto ecamhostreg; | |
1243 | ||
1244 | /* IDMAC interface */ | |
1245 | dmaengine_get(); | |
1246 | ||
1247 | return 0; | |
1248 | ||
1249 | ecamhostreg: | |
1250 | iounmap(base); | |
1251 | eioremap: | |
1252 | clk_put(mx3_cam->clk); | |
1253 | eclkget: | |
1254 | vfree(mx3_cam); | |
1255 | ealloc: | |
1256 | egetres: | |
1257 | return err; | |
1258 | } | |
1259 | ||
1260 | static int __devexit mx3_camera_remove(struct platform_device *pdev) | |
1261 | { | |
eff505fa GL |
1262 | struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev); |
1263 | struct mx3_camera_dev *mx3_cam = container_of(soc_host, | |
1264 | struct mx3_camera_dev, soc_host); | |
4f67130a GL |
1265 | |
1266 | clk_put(mx3_cam->clk); | |
1267 | ||
eff505fa | 1268 | soc_camera_host_unregister(soc_host); |
4f67130a GL |
1269 | |
1270 | iounmap(mx3_cam->base); | |
1271 | ||
1272 | /* | |
1273 | * The channel has either not been allocated, | |
1274 | * or should have been released | |
1275 | */ | |
1276 | if (WARN_ON(mx3_cam->idmac_channel[0])) | |
1277 | dma_release_channel(&mx3_cam->idmac_channel[0]->dma_chan); | |
1278 | ||
1279 | vfree(mx3_cam); | |
1280 | ||
1281 | dmaengine_put(); | |
1282 | ||
1283 | dev_info(&pdev->dev, "i.MX3x Camera driver unloaded\n"); | |
1284 | ||
1285 | return 0; | |
1286 | } | |
1287 | ||
1288 | static struct platform_driver mx3_camera_driver = { | |
1289 | .driver = { | |
1290 | .name = MX3_CAM_DRV_NAME, | |
1291 | }, | |
1292 | .probe = mx3_camera_probe, | |
e36bc31f | 1293 | .remove = __devexit_p(mx3_camera_remove), |
4f67130a GL |
1294 | }; |
1295 | ||
1296 | ||
e36bc31f | 1297 | static int __init mx3_camera_init(void) |
4f67130a GL |
1298 | { |
1299 | return platform_driver_register(&mx3_camera_driver); | |
1300 | } | |
1301 | ||
1302 | static void __exit mx3_camera_exit(void) | |
1303 | { | |
1304 | platform_driver_unregister(&mx3_camera_driver); | |
1305 | } | |
1306 | ||
1307 | module_init(mx3_camera_init); | |
1308 | module_exit(mx3_camera_exit); | |
1309 | ||
1310 | MODULE_DESCRIPTION("i.MX3x SoC Camera Host driver"); | |
1311 | MODULE_AUTHOR("Guennadi Liakhovetski <lg@denx.de>"); | |
1312 | MODULE_LICENSE("GPL v2"); | |
40e2e092 | 1313 | MODULE_ALIAS("platform:" MX3_CAM_DRV_NAME); |