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Merge branches 'x86-cleanups-for-linus' and 'x86-cpufeature-for-linus' of git://git...
[deliverable/linux.git] / drivers / media / video / mx2_camera.c
1 /*
2 * V4L2 Driver for i.MX27/i.MX25 camera host
3 *
4 * Copyright (C) 2008, Sascha Hauer, Pengutronix
5 * Copyright (C) 2010, Baruch Siach, Orex Computed Radiography
6 * Copyright (C) 2012, Javier Martin, Vista Silicon S.L.
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 */
13
14 #include <linux/init.h>
15 #include <linux/module.h>
16 #include <linux/io.h>
17 #include <linux/delay.h>
18 #include <linux/slab.h>
19 #include <linux/dma-mapping.h>
20 #include <linux/errno.h>
21 #include <linux/fs.h>
22 #include <linux/gcd.h>
23 #include <linux/interrupt.h>
24 #include <linux/kernel.h>
25 #include <linux/math64.h>
26 #include <linux/mm.h>
27 #include <linux/moduleparam.h>
28 #include <linux/time.h>
29 #include <linux/device.h>
30 #include <linux/platform_device.h>
31 #include <linux/mutex.h>
32 #include <linux/clk.h>
33
34 #include <media/v4l2-common.h>
35 #include <media/v4l2-dev.h>
36 #include <media/videobuf2-core.h>
37 #include <media/videobuf2-dma-contig.h>
38 #include <media/soc_camera.h>
39 #include <media/soc_mediabus.h>
40
41 #include <linux/videodev2.h>
42
43 #include <mach/mx2_cam.h>
44 #include <mach/hardware.h>
45
46 #include <asm/dma.h>
47
48 #define MX2_CAM_DRV_NAME "mx2-camera"
49 #define MX2_CAM_VERSION "0.0.6"
50 #define MX2_CAM_DRIVER_DESCRIPTION "i.MX2x_Camera"
51
52 /* reset values */
53 #define CSICR1_RESET_VAL 0x40000800
54 #define CSICR2_RESET_VAL 0x0
55 #define CSICR3_RESET_VAL 0x0
56
57 /* csi control reg 1 */
58 #define CSICR1_SWAP16_EN (1 << 31)
59 #define CSICR1_EXT_VSYNC (1 << 30)
60 #define CSICR1_EOF_INTEN (1 << 29)
61 #define CSICR1_PRP_IF_EN (1 << 28)
62 #define CSICR1_CCIR_MODE (1 << 27)
63 #define CSICR1_COF_INTEN (1 << 26)
64 #define CSICR1_SF_OR_INTEN (1 << 25)
65 #define CSICR1_RF_OR_INTEN (1 << 24)
66 #define CSICR1_STATFF_LEVEL (3 << 22)
67 #define CSICR1_STATFF_INTEN (1 << 21)
68 #define CSICR1_RXFF_LEVEL(l) (((l) & 3) << 19) /* MX27 */
69 #define CSICR1_FB2_DMA_INTEN (1 << 20) /* MX25 */
70 #define CSICR1_FB1_DMA_INTEN (1 << 19) /* MX25 */
71 #define CSICR1_RXFF_INTEN (1 << 18)
72 #define CSICR1_SOF_POL (1 << 17)
73 #define CSICR1_SOF_INTEN (1 << 16)
74 #define CSICR1_MCLKDIV(d) (((d) & 0xF) << 12)
75 #define CSICR1_HSYNC_POL (1 << 11)
76 #define CSICR1_CCIR_EN (1 << 10)
77 #define CSICR1_MCLKEN (1 << 9)
78 #define CSICR1_FCC (1 << 8)
79 #define CSICR1_PACK_DIR (1 << 7)
80 #define CSICR1_CLR_STATFIFO (1 << 6)
81 #define CSICR1_CLR_RXFIFO (1 << 5)
82 #define CSICR1_GCLK_MODE (1 << 4)
83 #define CSICR1_INV_DATA (1 << 3)
84 #define CSICR1_INV_PCLK (1 << 2)
85 #define CSICR1_REDGE (1 << 1)
86 #define CSICR1_FMT_MASK (CSICR1_PACK_DIR | CSICR1_SWAP16_EN)
87
88 #define SHIFT_STATFF_LEVEL 22
89 #define SHIFT_RXFF_LEVEL 19
90 #define SHIFT_MCLKDIV 12
91
92 /* control reg 3 */
93 #define CSICR3_FRMCNT (0xFFFF << 16)
94 #define CSICR3_FRMCNT_RST (1 << 15)
95 #define CSICR3_DMA_REFLASH_RFF (1 << 14)
96 #define CSICR3_DMA_REFLASH_SFF (1 << 13)
97 #define CSICR3_DMA_REQ_EN_RFF (1 << 12)
98 #define CSICR3_DMA_REQ_EN_SFF (1 << 11)
99 #define CSICR3_RXFF_LEVEL(l) (((l) & 7) << 4) /* MX25 */
100 #define CSICR3_CSI_SUP (1 << 3)
101 #define CSICR3_ZERO_PACK_EN (1 << 2)
102 #define CSICR3_ECC_INT_EN (1 << 1)
103 #define CSICR3_ECC_AUTO_EN (1 << 0)
104
105 #define SHIFT_FRMCNT 16
106
107 /* csi status reg */
108 #define CSISR_SFF_OR_INT (1 << 25)
109 #define CSISR_RFF_OR_INT (1 << 24)
110 #define CSISR_STATFF_INT (1 << 21)
111 #define CSISR_DMA_TSF_FB2_INT (1 << 20) /* MX25 */
112 #define CSISR_DMA_TSF_FB1_INT (1 << 19) /* MX25 */
113 #define CSISR_RXFF_INT (1 << 18)
114 #define CSISR_EOF_INT (1 << 17)
115 #define CSISR_SOF_INT (1 << 16)
116 #define CSISR_F2_INT (1 << 15)
117 #define CSISR_F1_INT (1 << 14)
118 #define CSISR_COF_INT (1 << 13)
119 #define CSISR_ECC_INT (1 << 1)
120 #define CSISR_DRDY (1 << 0)
121
122 #define CSICR1 0x00
123 #define CSICR2 0x04
124 #define CSISR (cpu_is_mx27() ? 0x08 : 0x18)
125 #define CSISTATFIFO 0x0c
126 #define CSIRFIFO 0x10
127 #define CSIRXCNT 0x14
128 #define CSICR3 (cpu_is_mx27() ? 0x1C : 0x08)
129 #define CSIDMASA_STATFIFO 0x20
130 #define CSIDMATA_STATFIFO 0x24
131 #define CSIDMASA_FB1 0x28
132 #define CSIDMASA_FB2 0x2c
133 #define CSIFBUF_PARA 0x30
134 #define CSIIMAG_PARA 0x34
135
136 /* EMMA PrP */
137 #define PRP_CNTL 0x00
138 #define PRP_INTR_CNTL 0x04
139 #define PRP_INTRSTATUS 0x08
140 #define PRP_SOURCE_Y_PTR 0x0c
141 #define PRP_SOURCE_CB_PTR 0x10
142 #define PRP_SOURCE_CR_PTR 0x14
143 #define PRP_DEST_RGB1_PTR 0x18
144 #define PRP_DEST_RGB2_PTR 0x1c
145 #define PRP_DEST_Y_PTR 0x20
146 #define PRP_DEST_CB_PTR 0x24
147 #define PRP_DEST_CR_PTR 0x28
148 #define PRP_SRC_FRAME_SIZE 0x2c
149 #define PRP_DEST_CH1_LINE_STRIDE 0x30
150 #define PRP_SRC_PIXEL_FORMAT_CNTL 0x34
151 #define PRP_CH1_PIXEL_FORMAT_CNTL 0x38
152 #define PRP_CH1_OUT_IMAGE_SIZE 0x3c
153 #define PRP_CH2_OUT_IMAGE_SIZE 0x40
154 #define PRP_SRC_LINE_STRIDE 0x44
155 #define PRP_CSC_COEF_012 0x48
156 #define PRP_CSC_COEF_345 0x4c
157 #define PRP_CSC_COEF_678 0x50
158 #define PRP_CH1_RZ_HORI_COEF1 0x54
159 #define PRP_CH1_RZ_HORI_COEF2 0x58
160 #define PRP_CH1_RZ_HORI_VALID 0x5c
161 #define PRP_CH1_RZ_VERT_COEF1 0x60
162 #define PRP_CH1_RZ_VERT_COEF2 0x64
163 #define PRP_CH1_RZ_VERT_VALID 0x68
164 #define PRP_CH2_RZ_HORI_COEF1 0x6c
165 #define PRP_CH2_RZ_HORI_COEF2 0x70
166 #define PRP_CH2_RZ_HORI_VALID 0x74
167 #define PRP_CH2_RZ_VERT_COEF1 0x78
168 #define PRP_CH2_RZ_VERT_COEF2 0x7c
169 #define PRP_CH2_RZ_VERT_VALID 0x80
170
171 #define PRP_CNTL_CH1EN (1 << 0)
172 #define PRP_CNTL_CH2EN (1 << 1)
173 #define PRP_CNTL_CSIEN (1 << 2)
174 #define PRP_CNTL_DATA_IN_YUV420 (0 << 3)
175 #define PRP_CNTL_DATA_IN_YUV422 (1 << 3)
176 #define PRP_CNTL_DATA_IN_RGB16 (2 << 3)
177 #define PRP_CNTL_DATA_IN_RGB32 (3 << 3)
178 #define PRP_CNTL_CH1_OUT_RGB8 (0 << 5)
179 #define PRP_CNTL_CH1_OUT_RGB16 (1 << 5)
180 #define PRP_CNTL_CH1_OUT_RGB32 (2 << 5)
181 #define PRP_CNTL_CH1_OUT_YUV422 (3 << 5)
182 #define PRP_CNTL_CH2_OUT_YUV420 (0 << 7)
183 #define PRP_CNTL_CH2_OUT_YUV422 (1 << 7)
184 #define PRP_CNTL_CH2_OUT_YUV444 (2 << 7)
185 #define PRP_CNTL_CH1_LEN (1 << 9)
186 #define PRP_CNTL_CH2_LEN (1 << 10)
187 #define PRP_CNTL_SKIP_FRAME (1 << 11)
188 #define PRP_CNTL_SWRST (1 << 12)
189 #define PRP_CNTL_CLKEN (1 << 13)
190 #define PRP_CNTL_WEN (1 << 14)
191 #define PRP_CNTL_CH1BYP (1 << 15)
192 #define PRP_CNTL_IN_TSKIP(x) ((x) << 16)
193 #define PRP_CNTL_CH1_TSKIP(x) ((x) << 19)
194 #define PRP_CNTL_CH2_TSKIP(x) ((x) << 22)
195 #define PRP_CNTL_INPUT_FIFO_LEVEL(x) ((x) << 25)
196 #define PRP_CNTL_RZ_FIFO_LEVEL(x) ((x) << 27)
197 #define PRP_CNTL_CH2B1EN (1 << 29)
198 #define PRP_CNTL_CH2B2EN (1 << 30)
199 #define PRP_CNTL_CH2FEN (1 << 31)
200
201 /* IRQ Enable and status register */
202 #define PRP_INTR_RDERR (1 << 0)
203 #define PRP_INTR_CH1WERR (1 << 1)
204 #define PRP_INTR_CH2WERR (1 << 2)
205 #define PRP_INTR_CH1FC (1 << 3)
206 #define PRP_INTR_CH2FC (1 << 5)
207 #define PRP_INTR_LBOVF (1 << 7)
208 #define PRP_INTR_CH2OVF (1 << 8)
209
210 /* Resizing registers */
211 #define PRP_RZ_VALID_TBL_LEN(x) ((x) << 24)
212 #define PRP_RZ_VALID_BILINEAR (1 << 31)
213
214 #define MAX_VIDEO_MEM 16
215
216 #define RESIZE_NUM_MIN 1
217 #define RESIZE_NUM_MAX 20
218 #define BC_COEF 3
219 #define SZ_COEF (1 << BC_COEF)
220
221 #define RESIZE_DIR_H 0
222 #define RESIZE_DIR_V 1
223
224 #define RESIZE_ALGO_BILINEAR 0
225 #define RESIZE_ALGO_AVERAGING 1
226
227 struct mx2_prp_cfg {
228 int channel;
229 u32 in_fmt;
230 u32 out_fmt;
231 u32 src_pixel;
232 u32 ch1_pixel;
233 u32 irq_flags;
234 u32 csicr1;
235 };
236
237 /* prp resizing parameters */
238 struct emma_prp_resize {
239 int algo; /* type of algorithm used */
240 int len; /* number of coefficients */
241 unsigned char s[RESIZE_NUM_MAX]; /* table of coefficients */
242 };
243
244 /* prp configuration for a client-host fmt pair */
245 struct mx2_fmt_cfg {
246 enum v4l2_mbus_pixelcode in_fmt;
247 u32 out_fmt;
248 struct mx2_prp_cfg cfg;
249 };
250
251 enum mx2_buffer_state {
252 MX2_STATE_QUEUED,
253 MX2_STATE_ACTIVE,
254 MX2_STATE_DONE,
255 };
256
257 struct mx2_buf_internal {
258 struct list_head queue;
259 int bufnum;
260 bool discard;
261 };
262
263 /* buffer for one video frame */
264 struct mx2_buffer {
265 /* common v4l buffer stuff -- must be first */
266 struct vb2_buffer vb;
267 enum mx2_buffer_state state;
268 struct mx2_buf_internal internal;
269 };
270
271 struct mx2_camera_dev {
272 struct device *dev;
273 struct soc_camera_host soc_host;
274 struct soc_camera_device *icd;
275 struct clk *clk_csi, *clk_emma;
276
277 unsigned int irq_csi, irq_emma;
278 void __iomem *base_csi, *base_emma;
279 unsigned long base_dma;
280
281 struct mx2_camera_platform_data *pdata;
282 struct resource *res_csi, *res_emma;
283 unsigned long platform_flags;
284
285 struct list_head capture;
286 struct list_head active_bufs;
287 struct list_head discard;
288
289 spinlock_t lock;
290
291 int dma;
292 struct mx2_buffer *active;
293 struct mx2_buffer *fb1_active;
294 struct mx2_buffer *fb2_active;
295
296 u32 csicr1;
297
298 struct mx2_buf_internal buf_discard[2];
299 void *discard_buffer;
300 dma_addr_t discard_buffer_dma;
301 size_t discard_size;
302 struct mx2_fmt_cfg *emma_prp;
303 struct emma_prp_resize resizing[2];
304 unsigned int s_width, s_height;
305 u32 frame_count;
306 struct vb2_alloc_ctx *alloc_ctx;
307 };
308
309 static struct mx2_buffer *mx2_ibuf_to_buf(struct mx2_buf_internal *int_buf)
310 {
311 return container_of(int_buf, struct mx2_buffer, internal);
312 }
313
314 static struct mx2_fmt_cfg mx27_emma_prp_table[] = {
315 /*
316 * This is a generic configuration which is valid for most
317 * prp input-output format combinations.
318 * We set the incomming and outgoing pixelformat to a
319 * 16 Bit wide format and adjust the bytesperline
320 * accordingly. With this configuration the inputdata
321 * will not be changed by the emma and could be any type
322 * of 16 Bit Pixelformat.
323 */
324 {
325 .in_fmt = 0,
326 .out_fmt = 0,
327 .cfg = {
328 .channel = 1,
329 .in_fmt = PRP_CNTL_DATA_IN_RGB16,
330 .out_fmt = PRP_CNTL_CH1_OUT_RGB16,
331 .src_pixel = 0x2ca00565, /* RGB565 */
332 .ch1_pixel = 0x2ca00565, /* RGB565 */
333 .irq_flags = PRP_INTR_RDERR | PRP_INTR_CH1WERR |
334 PRP_INTR_CH1FC | PRP_INTR_LBOVF,
335 .csicr1 = 0,
336 }
337 },
338 {
339 .in_fmt = V4L2_MBUS_FMT_YUYV8_2X8,
340 .out_fmt = V4L2_PIX_FMT_YUV420,
341 .cfg = {
342 .channel = 2,
343 .in_fmt = PRP_CNTL_DATA_IN_YUV422,
344 .out_fmt = PRP_CNTL_CH2_OUT_YUV420,
345 .src_pixel = 0x22000888, /* YUV422 (YUYV) */
346 .irq_flags = PRP_INTR_RDERR | PRP_INTR_CH2WERR |
347 PRP_INTR_CH2FC | PRP_INTR_LBOVF |
348 PRP_INTR_CH2OVF,
349 .csicr1 = CSICR1_PACK_DIR,
350 }
351 },
352 {
353 .in_fmt = V4L2_MBUS_FMT_UYVY8_2X8,
354 .out_fmt = V4L2_PIX_FMT_YUV420,
355 .cfg = {
356 .channel = 2,
357 .in_fmt = PRP_CNTL_DATA_IN_YUV422,
358 .out_fmt = PRP_CNTL_CH2_OUT_YUV420,
359 .src_pixel = 0x22000888, /* YUV422 (YUYV) */
360 .irq_flags = PRP_INTR_RDERR | PRP_INTR_CH2WERR |
361 PRP_INTR_CH2FC | PRP_INTR_LBOVF |
362 PRP_INTR_CH2OVF,
363 .csicr1 = CSICR1_SWAP16_EN,
364 }
365 },
366 };
367
368 static struct mx2_fmt_cfg *mx27_emma_prp_get_format(
369 enum v4l2_mbus_pixelcode in_fmt,
370 u32 out_fmt)
371 {
372 int i;
373
374 for (i = 1; i < ARRAY_SIZE(mx27_emma_prp_table); i++)
375 if ((mx27_emma_prp_table[i].in_fmt == in_fmt) &&
376 (mx27_emma_prp_table[i].out_fmt == out_fmt)) {
377 return &mx27_emma_prp_table[i];
378 }
379 /* If no match return the most generic configuration */
380 return &mx27_emma_prp_table[0];
381 };
382
383 static void mx27_update_emma_buf(struct mx2_camera_dev *pcdev,
384 unsigned long phys, int bufnum)
385 {
386 struct mx2_fmt_cfg *prp = pcdev->emma_prp;
387
388 if (prp->cfg.channel == 1) {
389 writel(phys, pcdev->base_emma +
390 PRP_DEST_RGB1_PTR + 4 * bufnum);
391 } else {
392 writel(phys, pcdev->base_emma +
393 PRP_DEST_Y_PTR - 0x14 * bufnum);
394 if (prp->out_fmt == V4L2_PIX_FMT_YUV420) {
395 u32 imgsize = pcdev->icd->user_height *
396 pcdev->icd->user_width;
397
398 writel(phys + imgsize, pcdev->base_emma +
399 PRP_DEST_CB_PTR - 0x14 * bufnum);
400 writel(phys + ((5 * imgsize) / 4), pcdev->base_emma +
401 PRP_DEST_CR_PTR - 0x14 * bufnum);
402 }
403 }
404 }
405
406 static void mx2_camera_deactivate(struct mx2_camera_dev *pcdev)
407 {
408 unsigned long flags;
409
410 clk_disable(pcdev->clk_csi);
411 writel(0, pcdev->base_csi + CSICR1);
412 if (cpu_is_mx27()) {
413 writel(0, pcdev->base_emma + PRP_CNTL);
414 } else if (cpu_is_mx25()) {
415 spin_lock_irqsave(&pcdev->lock, flags);
416 pcdev->fb1_active = NULL;
417 pcdev->fb2_active = NULL;
418 writel(0, pcdev->base_csi + CSIDMASA_FB1);
419 writel(0, pcdev->base_csi + CSIDMASA_FB2);
420 spin_unlock_irqrestore(&pcdev->lock, flags);
421 }
422 }
423
424 /*
425 * The following two functions absolutely depend on the fact, that
426 * there can be only one camera on mx2 camera sensor interface
427 */
428 static int mx2_camera_add_device(struct soc_camera_device *icd)
429 {
430 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
431 struct mx2_camera_dev *pcdev = ici->priv;
432 int ret;
433 u32 csicr1;
434
435 if (pcdev->icd)
436 return -EBUSY;
437
438 ret = clk_enable(pcdev->clk_csi);
439 if (ret < 0)
440 return ret;
441
442 csicr1 = CSICR1_MCLKEN;
443
444 if (cpu_is_mx27()) {
445 csicr1 |= CSICR1_PRP_IF_EN | CSICR1_FCC |
446 CSICR1_RXFF_LEVEL(0);
447 } else if (cpu_is_mx27())
448 csicr1 |= CSICR1_SOF_INTEN | CSICR1_RXFF_LEVEL(2);
449
450 pcdev->csicr1 = csicr1;
451 writel(pcdev->csicr1, pcdev->base_csi + CSICR1);
452
453 pcdev->icd = icd;
454 pcdev->frame_count = 0;
455
456 dev_info(icd->parent, "Camera driver attached to camera %d\n",
457 icd->devnum);
458
459 return 0;
460 }
461
462 static void mx2_camera_remove_device(struct soc_camera_device *icd)
463 {
464 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
465 struct mx2_camera_dev *pcdev = ici->priv;
466
467 BUG_ON(icd != pcdev->icd);
468
469 dev_info(icd->parent, "Camera driver detached from camera %d\n",
470 icd->devnum);
471
472 mx2_camera_deactivate(pcdev);
473
474 pcdev->icd = NULL;
475 }
476
477 static void mx25_camera_frame_done(struct mx2_camera_dev *pcdev, int fb,
478 int state)
479 {
480 struct vb2_buffer *vb;
481 struct mx2_buffer *buf;
482 struct mx2_buffer **fb_active = fb == 1 ? &pcdev->fb1_active :
483 &pcdev->fb2_active;
484 u32 fb_reg = fb == 1 ? CSIDMASA_FB1 : CSIDMASA_FB2;
485 unsigned long flags;
486
487 spin_lock_irqsave(&pcdev->lock, flags);
488
489 if (*fb_active == NULL)
490 goto out;
491
492 vb = &(*fb_active)->vb;
493 dev_dbg(pcdev->dev, "%s (vb=0x%p) 0x%p %lu\n", __func__,
494 vb, vb2_plane_vaddr(vb, 0), vb2_get_plane_payload(vb, 0));
495
496 do_gettimeofday(&vb->v4l2_buf.timestamp);
497 vb->v4l2_buf.sequence++;
498 vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
499
500 if (list_empty(&pcdev->capture)) {
501 buf = NULL;
502 writel(0, pcdev->base_csi + fb_reg);
503 } else {
504 buf = list_first_entry(&pcdev->capture, struct mx2_buffer,
505 internal.queue);
506 vb = &buf->vb;
507 list_del(&buf->internal.queue);
508 buf->state = MX2_STATE_ACTIVE;
509 writel(vb2_dma_contig_plane_dma_addr(vb, 0),
510 pcdev->base_csi + fb_reg);
511 }
512
513 *fb_active = buf;
514
515 out:
516 spin_unlock_irqrestore(&pcdev->lock, flags);
517 }
518
519 static irqreturn_t mx25_camera_irq(int irq_csi, void *data)
520 {
521 struct mx2_camera_dev *pcdev = data;
522 u32 status = readl(pcdev->base_csi + CSISR);
523
524 if (status & CSISR_DMA_TSF_FB1_INT)
525 mx25_camera_frame_done(pcdev, 1, MX2_STATE_DONE);
526 else if (status & CSISR_DMA_TSF_FB2_INT)
527 mx25_camera_frame_done(pcdev, 2, MX2_STATE_DONE);
528
529 /* FIXME: handle CSISR_RFF_OR_INT */
530
531 writel(status, pcdev->base_csi + CSISR);
532
533 return IRQ_HANDLED;
534 }
535
536 /*
537 * Videobuf operations
538 */
539 static int mx2_videobuf_setup(struct vb2_queue *vq,
540 const struct v4l2_format *fmt,
541 unsigned int *count, unsigned int *num_planes,
542 unsigned int sizes[], void *alloc_ctxs[])
543 {
544 struct soc_camera_device *icd = soc_camera_from_vb2q(vq);
545 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
546 struct mx2_camera_dev *pcdev = ici->priv;
547
548 dev_dbg(icd->parent, "count=%d, size=%d\n", *count, sizes[0]);
549
550 /* TODO: support for VIDIOC_CREATE_BUFS not ready */
551 if (fmt != NULL)
552 return -ENOTTY;
553
554 alloc_ctxs[0] = pcdev->alloc_ctx;
555
556 sizes[0] = icd->sizeimage;
557
558 if (0 == *count)
559 *count = 32;
560 if (!*num_planes &&
561 sizes[0] * *count > MAX_VIDEO_MEM * 1024 * 1024)
562 *count = (MAX_VIDEO_MEM * 1024 * 1024) / sizes[0];
563
564 *num_planes = 1;
565
566 return 0;
567 }
568
569 static int mx2_videobuf_prepare(struct vb2_buffer *vb)
570 {
571 struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
572 int ret = 0;
573
574 dev_dbg(icd->parent, "%s (vb=0x%p) 0x%p %lu\n", __func__,
575 vb, vb2_plane_vaddr(vb, 0), vb2_get_plane_payload(vb, 0));
576
577 #ifdef DEBUG
578 /*
579 * This can be useful if you want to see if we actually fill
580 * the buffer with something
581 */
582 memset((void *)vb2_plane_vaddr(vb, 0),
583 0xaa, vb2_get_plane_payload(vb, 0));
584 #endif
585
586 vb2_set_plane_payload(vb, 0, icd->sizeimage);
587 if (vb2_plane_vaddr(vb, 0) &&
588 vb2_get_plane_payload(vb, 0) > vb2_plane_size(vb, 0)) {
589 ret = -EINVAL;
590 goto out;
591 }
592
593 return 0;
594
595 out:
596 return ret;
597 }
598
599 static void mx2_videobuf_queue(struct vb2_buffer *vb)
600 {
601 struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
602 struct soc_camera_host *ici =
603 to_soc_camera_host(icd->parent);
604 struct mx2_camera_dev *pcdev = ici->priv;
605 struct mx2_buffer *buf = container_of(vb, struct mx2_buffer, vb);
606 unsigned long flags;
607
608 dev_dbg(icd->parent, "%s (vb=0x%p) 0x%p %lu\n", __func__,
609 vb, vb2_plane_vaddr(vb, 0), vb2_get_plane_payload(vb, 0));
610
611 spin_lock_irqsave(&pcdev->lock, flags);
612
613 buf->state = MX2_STATE_QUEUED;
614 list_add_tail(&buf->internal.queue, &pcdev->capture);
615
616 if (cpu_is_mx25()) {
617 u32 csicr3, dma_inten = 0;
618
619 if (pcdev->fb1_active == NULL) {
620 writel(vb2_dma_contig_plane_dma_addr(vb, 0),
621 pcdev->base_csi + CSIDMASA_FB1);
622 pcdev->fb1_active = buf;
623 dma_inten = CSICR1_FB1_DMA_INTEN;
624 } else if (pcdev->fb2_active == NULL) {
625 writel(vb2_dma_contig_plane_dma_addr(vb, 0),
626 pcdev->base_csi + CSIDMASA_FB2);
627 pcdev->fb2_active = buf;
628 dma_inten = CSICR1_FB2_DMA_INTEN;
629 }
630
631 if (dma_inten) {
632 list_del(&buf->internal.queue);
633 buf->state = MX2_STATE_ACTIVE;
634
635 csicr3 = readl(pcdev->base_csi + CSICR3);
636
637 /* Reflash DMA */
638 writel(csicr3 | CSICR3_DMA_REFLASH_RFF,
639 pcdev->base_csi + CSICR3);
640
641 /* clear & enable interrupts */
642 writel(dma_inten, pcdev->base_csi + CSISR);
643 pcdev->csicr1 |= dma_inten;
644 writel(pcdev->csicr1, pcdev->base_csi + CSICR1);
645
646 /* enable DMA */
647 csicr3 |= CSICR3_DMA_REQ_EN_RFF | CSICR3_RXFF_LEVEL(1);
648 writel(csicr3, pcdev->base_csi + CSICR3);
649 }
650 }
651
652 spin_unlock_irqrestore(&pcdev->lock, flags);
653 }
654
655 static void mx2_videobuf_release(struct vb2_buffer *vb)
656 {
657 struct soc_camera_device *icd = soc_camera_from_vb2q(vb->vb2_queue);
658 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
659 struct mx2_camera_dev *pcdev = ici->priv;
660 struct mx2_buffer *buf = container_of(vb, struct mx2_buffer, vb);
661 unsigned long flags;
662
663 #ifdef DEBUG
664 dev_dbg(icd->parent, "%s (vb=0x%p) 0x%p %lu\n", __func__,
665 vb, vb2_plane_vaddr(vb, 0), vb2_get_plane_payload(vb, 0));
666
667 switch (buf->state) {
668 case MX2_STATE_ACTIVE:
669 dev_info(icd->parent, "%s (active)\n", __func__);
670 break;
671 case MX2_STATE_QUEUED:
672 dev_info(icd->parent, "%s (queued)\n", __func__);
673 break;
674 default:
675 dev_info(icd->parent, "%s (unknown) %d\n", __func__,
676 buf->state);
677 break;
678 }
679 #endif
680
681 /*
682 * Terminate only queued but inactive buffers. Active buffers are
683 * released when they become inactive after videobuf_waiton().
684 *
685 * FIXME: implement forced termination of active buffers for mx27 and
686 * mx27 eMMA, so that the user won't get stuck in an uninterruptible
687 * state. This requires a specific handling for each of the these DMA
688 * types.
689 */
690
691 spin_lock_irqsave(&pcdev->lock, flags);
692 if (cpu_is_mx25() && buf->state == MX2_STATE_ACTIVE) {
693 if (pcdev->fb1_active == buf) {
694 pcdev->csicr1 &= ~CSICR1_FB1_DMA_INTEN;
695 writel(0, pcdev->base_csi + CSIDMASA_FB1);
696 pcdev->fb1_active = NULL;
697 } else if (pcdev->fb2_active == buf) {
698 pcdev->csicr1 &= ~CSICR1_FB2_DMA_INTEN;
699 writel(0, pcdev->base_csi + CSIDMASA_FB2);
700 pcdev->fb2_active = NULL;
701 }
702 writel(pcdev->csicr1, pcdev->base_csi + CSICR1);
703 }
704 spin_unlock_irqrestore(&pcdev->lock, flags);
705 }
706
707 static void mx27_camera_emma_buf_init(struct soc_camera_device *icd,
708 int bytesperline)
709 {
710 struct soc_camera_host *ici =
711 to_soc_camera_host(icd->parent);
712 struct mx2_camera_dev *pcdev = ici->priv;
713 struct mx2_fmt_cfg *prp = pcdev->emma_prp;
714
715 writel((pcdev->s_width << 16) | pcdev->s_height,
716 pcdev->base_emma + PRP_SRC_FRAME_SIZE);
717 writel(prp->cfg.src_pixel,
718 pcdev->base_emma + PRP_SRC_PIXEL_FORMAT_CNTL);
719 if (prp->cfg.channel == 1) {
720 writel((icd->user_width << 16) | icd->user_height,
721 pcdev->base_emma + PRP_CH1_OUT_IMAGE_SIZE);
722 writel(bytesperline,
723 pcdev->base_emma + PRP_DEST_CH1_LINE_STRIDE);
724 writel(prp->cfg.ch1_pixel,
725 pcdev->base_emma + PRP_CH1_PIXEL_FORMAT_CNTL);
726 } else { /* channel 2 */
727 writel((icd->user_width << 16) | icd->user_height,
728 pcdev->base_emma + PRP_CH2_OUT_IMAGE_SIZE);
729 }
730
731 /* Enable interrupts */
732 writel(prp->cfg.irq_flags, pcdev->base_emma + PRP_INTR_CNTL);
733 }
734
735 static void mx2_prp_resize_commit(struct mx2_camera_dev *pcdev)
736 {
737 int dir;
738
739 for (dir = RESIZE_DIR_H; dir <= RESIZE_DIR_V; dir++) {
740 unsigned char *s = pcdev->resizing[dir].s;
741 int len = pcdev->resizing[dir].len;
742 unsigned int coeff[2] = {0, 0};
743 unsigned int valid = 0;
744 int i;
745
746 if (len == 0)
747 continue;
748
749 for (i = RESIZE_NUM_MAX - 1; i >= 0; i--) {
750 int j;
751
752 j = i > 9 ? 1 : 0;
753 coeff[j] = (coeff[j] << BC_COEF) |
754 (s[i] & (SZ_COEF - 1));
755
756 if (i == 5 || i == 15)
757 coeff[j] <<= 1;
758
759 valid = (valid << 1) | (s[i] >> BC_COEF);
760 }
761
762 valid |= PRP_RZ_VALID_TBL_LEN(len);
763
764 if (pcdev->resizing[dir].algo == RESIZE_ALGO_BILINEAR)
765 valid |= PRP_RZ_VALID_BILINEAR;
766
767 if (pcdev->emma_prp->cfg.channel == 1) {
768 if (dir == RESIZE_DIR_H) {
769 writel(coeff[0], pcdev->base_emma +
770 PRP_CH1_RZ_HORI_COEF1);
771 writel(coeff[1], pcdev->base_emma +
772 PRP_CH1_RZ_HORI_COEF2);
773 writel(valid, pcdev->base_emma +
774 PRP_CH1_RZ_HORI_VALID);
775 } else {
776 writel(coeff[0], pcdev->base_emma +
777 PRP_CH1_RZ_VERT_COEF1);
778 writel(coeff[1], pcdev->base_emma +
779 PRP_CH1_RZ_VERT_COEF2);
780 writel(valid, pcdev->base_emma +
781 PRP_CH1_RZ_VERT_VALID);
782 }
783 } else {
784 if (dir == RESIZE_DIR_H) {
785 writel(coeff[0], pcdev->base_emma +
786 PRP_CH2_RZ_HORI_COEF1);
787 writel(coeff[1], pcdev->base_emma +
788 PRP_CH2_RZ_HORI_COEF2);
789 writel(valid, pcdev->base_emma +
790 PRP_CH2_RZ_HORI_VALID);
791 } else {
792 writel(coeff[0], pcdev->base_emma +
793 PRP_CH2_RZ_VERT_COEF1);
794 writel(coeff[1], pcdev->base_emma +
795 PRP_CH2_RZ_VERT_COEF2);
796 writel(valid, pcdev->base_emma +
797 PRP_CH2_RZ_VERT_VALID);
798 }
799 }
800 }
801 }
802
803 static int mx2_start_streaming(struct vb2_queue *q, unsigned int count)
804 {
805 struct soc_camera_device *icd = soc_camera_from_vb2q(q);
806 struct soc_camera_host *ici =
807 to_soc_camera_host(icd->parent);
808 struct mx2_camera_dev *pcdev = ici->priv;
809 struct mx2_fmt_cfg *prp = pcdev->emma_prp;
810 struct vb2_buffer *vb;
811 struct mx2_buffer *buf;
812 unsigned long phys;
813 int bytesperline;
814
815 if (cpu_is_mx27()) {
816 unsigned long flags;
817 if (count < 2)
818 return -EINVAL;
819
820 spin_lock_irqsave(&pcdev->lock, flags);
821
822 buf = list_first_entry(&pcdev->capture, struct mx2_buffer,
823 internal.queue);
824 buf->internal.bufnum = 0;
825 vb = &buf->vb;
826 buf->state = MX2_STATE_ACTIVE;
827
828 phys = vb2_dma_contig_plane_dma_addr(vb, 0);
829 mx27_update_emma_buf(pcdev, phys, buf->internal.bufnum);
830 list_move_tail(pcdev->capture.next, &pcdev->active_bufs);
831
832 buf = list_first_entry(&pcdev->capture, struct mx2_buffer,
833 internal.queue);
834 buf->internal.bufnum = 1;
835 vb = &buf->vb;
836 buf->state = MX2_STATE_ACTIVE;
837
838 phys = vb2_dma_contig_plane_dma_addr(vb, 0);
839 mx27_update_emma_buf(pcdev, phys, buf->internal.bufnum);
840 list_move_tail(pcdev->capture.next, &pcdev->active_bufs);
841
842 bytesperline = soc_mbus_bytes_per_line(icd->user_width,
843 icd->current_fmt->host_fmt);
844 if (bytesperline < 0)
845 return bytesperline;
846
847 /*
848 * I didn't manage to properly enable/disable the prp
849 * on a per frame basis during running transfers,
850 * thus we allocate a buffer here and use it to
851 * discard frames when no buffer is available.
852 * Feel free to work on this ;)
853 */
854 pcdev->discard_size = icd->user_height * bytesperline;
855 pcdev->discard_buffer = dma_alloc_coherent(ici->v4l2_dev.dev,
856 pcdev->discard_size, &pcdev->discard_buffer_dma,
857 GFP_KERNEL);
858 if (!pcdev->discard_buffer)
859 return -ENOMEM;
860
861 pcdev->buf_discard[0].discard = true;
862 list_add_tail(&pcdev->buf_discard[0].queue,
863 &pcdev->discard);
864
865 pcdev->buf_discard[1].discard = true;
866 list_add_tail(&pcdev->buf_discard[1].queue,
867 &pcdev->discard);
868
869 mx2_prp_resize_commit(pcdev);
870
871 mx27_camera_emma_buf_init(icd, bytesperline);
872
873 if (prp->cfg.channel == 1) {
874 writel(PRP_CNTL_CH1EN |
875 PRP_CNTL_CSIEN |
876 prp->cfg.in_fmt |
877 prp->cfg.out_fmt |
878 PRP_CNTL_CH1_LEN |
879 PRP_CNTL_CH1BYP |
880 PRP_CNTL_CH1_TSKIP(0) |
881 PRP_CNTL_IN_TSKIP(0),
882 pcdev->base_emma + PRP_CNTL);
883 } else {
884 writel(PRP_CNTL_CH2EN |
885 PRP_CNTL_CSIEN |
886 prp->cfg.in_fmt |
887 prp->cfg.out_fmt |
888 PRP_CNTL_CH2_LEN |
889 PRP_CNTL_CH2_TSKIP(0) |
890 PRP_CNTL_IN_TSKIP(0),
891 pcdev->base_emma + PRP_CNTL);
892 }
893 spin_unlock_irqrestore(&pcdev->lock, flags);
894 }
895
896 return 0;
897 }
898
899 static int mx2_stop_streaming(struct vb2_queue *q)
900 {
901 struct soc_camera_device *icd = soc_camera_from_vb2q(q);
902 struct soc_camera_host *ici =
903 to_soc_camera_host(icd->parent);
904 struct mx2_camera_dev *pcdev = ici->priv;
905 struct mx2_fmt_cfg *prp = pcdev->emma_prp;
906 unsigned long flags;
907 void *b;
908 u32 cntl;
909
910 if (cpu_is_mx27()) {
911 spin_lock_irqsave(&pcdev->lock, flags);
912
913 cntl = readl(pcdev->base_emma + PRP_CNTL);
914 if (prp->cfg.channel == 1) {
915 writel(cntl & ~PRP_CNTL_CH1EN,
916 pcdev->base_emma + PRP_CNTL);
917 } else {
918 writel(cntl & ~PRP_CNTL_CH2EN,
919 pcdev->base_emma + PRP_CNTL);
920 }
921 INIT_LIST_HEAD(&pcdev->capture);
922 INIT_LIST_HEAD(&pcdev->active_bufs);
923 INIT_LIST_HEAD(&pcdev->discard);
924
925 b = pcdev->discard_buffer;
926 pcdev->discard_buffer = NULL;
927
928 spin_unlock_irqrestore(&pcdev->lock, flags);
929
930 dma_free_coherent(ici->v4l2_dev.dev,
931 pcdev->discard_size, b, pcdev->discard_buffer_dma);
932 }
933
934 return 0;
935 }
936
937 static struct vb2_ops mx2_videobuf_ops = {
938 .queue_setup = mx2_videobuf_setup,
939 .buf_prepare = mx2_videobuf_prepare,
940 .buf_queue = mx2_videobuf_queue,
941 .buf_cleanup = mx2_videobuf_release,
942 .start_streaming = mx2_start_streaming,
943 .stop_streaming = mx2_stop_streaming,
944 };
945
946 static int mx2_camera_init_videobuf(struct vb2_queue *q,
947 struct soc_camera_device *icd)
948 {
949 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
950 q->io_modes = VB2_MMAP | VB2_USERPTR;
951 q->drv_priv = icd;
952 q->ops = &mx2_videobuf_ops;
953 q->mem_ops = &vb2_dma_contig_memops;
954 q->buf_struct_size = sizeof(struct mx2_buffer);
955
956 return vb2_queue_init(q);
957 }
958
959 #define MX2_BUS_FLAGS (V4L2_MBUS_MASTER | \
960 V4L2_MBUS_VSYNC_ACTIVE_HIGH | \
961 V4L2_MBUS_VSYNC_ACTIVE_LOW | \
962 V4L2_MBUS_HSYNC_ACTIVE_HIGH | \
963 V4L2_MBUS_HSYNC_ACTIVE_LOW | \
964 V4L2_MBUS_PCLK_SAMPLE_RISING | \
965 V4L2_MBUS_PCLK_SAMPLE_FALLING | \
966 V4L2_MBUS_DATA_ACTIVE_HIGH | \
967 V4L2_MBUS_DATA_ACTIVE_LOW)
968
969 static int mx27_camera_emma_prp_reset(struct mx2_camera_dev *pcdev)
970 {
971 u32 cntl;
972 int count = 0;
973
974 cntl = readl(pcdev->base_emma + PRP_CNTL);
975 writel(PRP_CNTL_SWRST, pcdev->base_emma + PRP_CNTL);
976 while (count++ < 100) {
977 if (!(readl(pcdev->base_emma + PRP_CNTL) & PRP_CNTL_SWRST))
978 return 0;
979 barrier();
980 udelay(1);
981 }
982
983 return -ETIMEDOUT;
984 }
985
986 static int mx2_camera_set_bus_param(struct soc_camera_device *icd)
987 {
988 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
989 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
990 struct mx2_camera_dev *pcdev = ici->priv;
991 struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,};
992 unsigned long common_flags;
993 int ret;
994 int bytesperline;
995 u32 csicr1 = pcdev->csicr1;
996
997 ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg);
998 if (!ret) {
999 common_flags = soc_mbus_config_compatible(&cfg, MX2_BUS_FLAGS);
1000 if (!common_flags) {
1001 dev_warn(icd->parent,
1002 "Flags incompatible: camera 0x%x, host 0x%x\n",
1003 cfg.flags, MX2_BUS_FLAGS);
1004 return -EINVAL;
1005 }
1006 } else if (ret != -ENOIOCTLCMD) {
1007 return ret;
1008 } else {
1009 common_flags = MX2_BUS_FLAGS;
1010 }
1011
1012 if ((common_flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH) &&
1013 (common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)) {
1014 if (pcdev->platform_flags & MX2_CAMERA_HSYNC_HIGH)
1015 common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_LOW;
1016 else
1017 common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_HIGH;
1018 }
1019
1020 if ((common_flags & V4L2_MBUS_PCLK_SAMPLE_RISING) &&
1021 (common_flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)) {
1022 if (pcdev->platform_flags & MX2_CAMERA_PCLK_SAMPLE_RISING)
1023 common_flags &= ~V4L2_MBUS_PCLK_SAMPLE_FALLING;
1024 else
1025 common_flags &= ~V4L2_MBUS_PCLK_SAMPLE_RISING;
1026 }
1027
1028 cfg.flags = common_flags;
1029 ret = v4l2_subdev_call(sd, video, s_mbus_config, &cfg);
1030 if (ret < 0 && ret != -ENOIOCTLCMD) {
1031 dev_dbg(icd->parent, "camera s_mbus_config(0x%lx) returned %d\n",
1032 common_flags, ret);
1033 return ret;
1034 }
1035
1036 csicr1 = (csicr1 & ~CSICR1_FMT_MASK) | pcdev->emma_prp->cfg.csicr1;
1037
1038 if (common_flags & V4L2_MBUS_PCLK_SAMPLE_RISING)
1039 csicr1 |= CSICR1_REDGE;
1040 if (common_flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH)
1041 csicr1 |= CSICR1_SOF_POL;
1042 if (common_flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH)
1043 csicr1 |= CSICR1_HSYNC_POL;
1044 if (pcdev->platform_flags & MX2_CAMERA_EXT_VSYNC)
1045 csicr1 |= CSICR1_EXT_VSYNC;
1046 if (pcdev->platform_flags & MX2_CAMERA_CCIR)
1047 csicr1 |= CSICR1_CCIR_EN;
1048 if (pcdev->platform_flags & MX2_CAMERA_CCIR_INTERLACE)
1049 csicr1 |= CSICR1_CCIR_MODE;
1050 if (pcdev->platform_flags & MX2_CAMERA_GATED_CLOCK)
1051 csicr1 |= CSICR1_GCLK_MODE;
1052 if (pcdev->platform_flags & MX2_CAMERA_INV_DATA)
1053 csicr1 |= CSICR1_INV_DATA;
1054
1055 pcdev->csicr1 = csicr1;
1056
1057 bytesperline = soc_mbus_bytes_per_line(icd->user_width,
1058 icd->current_fmt->host_fmt);
1059 if (bytesperline < 0)
1060 return bytesperline;
1061
1062 if (cpu_is_mx27()) {
1063 ret = mx27_camera_emma_prp_reset(pcdev);
1064 if (ret)
1065 return ret;
1066 } else if (cpu_is_mx25()) {
1067 writel((bytesperline * icd->user_height) >> 2,
1068 pcdev->base_csi + CSIRXCNT);
1069 writel((bytesperline << 16) | icd->user_height,
1070 pcdev->base_csi + CSIIMAG_PARA);
1071 }
1072
1073 writel(pcdev->csicr1, pcdev->base_csi + CSICR1);
1074
1075 return 0;
1076 }
1077
1078 static int mx2_camera_set_crop(struct soc_camera_device *icd,
1079 struct v4l2_crop *a)
1080 {
1081 struct v4l2_rect *rect = &a->c;
1082 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1083 struct v4l2_mbus_framefmt mf;
1084 int ret;
1085
1086 soc_camera_limit_side(&rect->left, &rect->width, 0, 2, 4096);
1087 soc_camera_limit_side(&rect->top, &rect->height, 0, 2, 4096);
1088
1089 ret = v4l2_subdev_call(sd, video, s_crop, a);
1090 if (ret < 0)
1091 return ret;
1092
1093 /* The capture device might have changed its output */
1094 ret = v4l2_subdev_call(sd, video, g_mbus_fmt, &mf);
1095 if (ret < 0)
1096 return ret;
1097
1098 dev_dbg(icd->parent, "Sensor cropped %dx%d\n",
1099 mf.width, mf.height);
1100
1101 icd->user_width = mf.width;
1102 icd->user_height = mf.height;
1103
1104 return ret;
1105 }
1106
1107 static int mx2_camera_get_formats(struct soc_camera_device *icd,
1108 unsigned int idx,
1109 struct soc_camera_format_xlate *xlate)
1110 {
1111 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1112 const struct soc_mbus_pixelfmt *fmt;
1113 struct device *dev = icd->parent;
1114 enum v4l2_mbus_pixelcode code;
1115 int ret, formats = 0;
1116
1117 ret = v4l2_subdev_call(sd, video, enum_mbus_fmt, idx, &code);
1118 if (ret < 0)
1119 /* no more formats */
1120 return 0;
1121
1122 fmt = soc_mbus_get_fmtdesc(code);
1123 if (!fmt) {
1124 dev_err(dev, "Invalid format code #%u: %d\n", idx, code);
1125 return 0;
1126 }
1127
1128 if (code == V4L2_MBUS_FMT_YUYV8_2X8 ||
1129 code == V4L2_MBUS_FMT_UYVY8_2X8) {
1130 formats++;
1131 if (xlate) {
1132 /*
1133 * CH2 can output YUV420 which is a standard format in
1134 * soc_mediabus.c
1135 */
1136 xlate->host_fmt =
1137 soc_mbus_get_fmtdesc(V4L2_MBUS_FMT_YUYV8_1_5X8);
1138 xlate->code = code;
1139 dev_dbg(dev, "Providing host format %s for sensor code %d\n",
1140 xlate->host_fmt->name, code);
1141 xlate++;
1142 }
1143 }
1144
1145 /* Generic pass-trough */
1146 formats++;
1147 if (xlate) {
1148 xlate->host_fmt = fmt;
1149 xlate->code = code;
1150 xlate++;
1151 }
1152 return formats;
1153 }
1154
1155 static int mx2_emmaprp_resize(struct mx2_camera_dev *pcdev,
1156 struct v4l2_mbus_framefmt *mf_in,
1157 struct v4l2_pix_format *pix_out, bool apply)
1158 {
1159 int num, den;
1160 unsigned long m;
1161 int i, dir;
1162
1163 for (dir = RESIZE_DIR_H; dir <= RESIZE_DIR_V; dir++) {
1164 struct emma_prp_resize tmprsz;
1165 unsigned char *s = tmprsz.s;
1166 int len = 0;
1167 int in, out;
1168
1169 if (dir == RESIZE_DIR_H) {
1170 in = mf_in->width;
1171 out = pix_out->width;
1172 } else {
1173 in = mf_in->height;
1174 out = pix_out->height;
1175 }
1176
1177 if (in < out)
1178 return -EINVAL;
1179 else if (in == out)
1180 continue;
1181
1182 /* Calculate ratio */
1183 m = gcd(in, out);
1184 num = in / m;
1185 den = out / m;
1186 if (num > RESIZE_NUM_MAX)
1187 return -EINVAL;
1188
1189 if ((num >= 2 * den) && (den == 1) &&
1190 (num < 9) && (!(num & 0x01))) {
1191 int sum = 0;
1192 int j;
1193
1194 /* Average scaling for >= 2:1 ratios */
1195 /* Support can be added for num >=9 and odd values */
1196
1197 tmprsz.algo = RESIZE_ALGO_AVERAGING;
1198 len = num;
1199
1200 for (i = 0; i < (len / 2); i++)
1201 s[i] = 8;
1202
1203 do {
1204 for (i = 0; i < (len / 2); i++) {
1205 s[i] = s[i] >> 1;
1206 sum = 0;
1207 for (j = 0; j < (len / 2); j++)
1208 sum += s[j];
1209 if (sum == 4)
1210 break;
1211 }
1212 } while (sum != 4);
1213
1214 for (i = (len / 2); i < len; i++)
1215 s[i] = s[len - i - 1];
1216
1217 s[len - 1] |= SZ_COEF;
1218 } else {
1219 /* bilinear scaling for < 2:1 ratios */
1220 int v; /* overflow counter */
1221 int coeff, nxt; /* table output */
1222 int in_pos_inc = 2 * den;
1223 int out_pos = num;
1224 int out_pos_inc = 2 * num;
1225 int init_carry = num - den;
1226 int carry = init_carry;
1227
1228 tmprsz.algo = RESIZE_ALGO_BILINEAR;
1229 v = den + in_pos_inc;
1230 do {
1231 coeff = v - out_pos;
1232 out_pos += out_pos_inc;
1233 carry += out_pos_inc;
1234 for (nxt = 0; v < out_pos; nxt++) {
1235 v += in_pos_inc;
1236 carry -= in_pos_inc;
1237 }
1238
1239 if (len > RESIZE_NUM_MAX)
1240 return -EINVAL;
1241
1242 coeff = ((coeff << BC_COEF) +
1243 (in_pos_inc >> 1)) / in_pos_inc;
1244
1245 if (coeff >= (SZ_COEF - 1))
1246 coeff--;
1247
1248 coeff |= SZ_COEF;
1249 s[len] = (unsigned char)coeff;
1250 len++;
1251
1252 for (i = 1; i < nxt; i++) {
1253 if (len >= RESIZE_NUM_MAX)
1254 return -EINVAL;
1255 s[len] = 0;
1256 len++;
1257 }
1258 } while (carry != init_carry);
1259 }
1260 tmprsz.len = len;
1261 if (dir == RESIZE_DIR_H)
1262 mf_in->width = pix_out->width;
1263 else
1264 mf_in->height = pix_out->height;
1265
1266 if (apply)
1267 memcpy(&pcdev->resizing[dir], &tmprsz, sizeof(tmprsz));
1268 }
1269 return 0;
1270 }
1271
1272 static int mx2_camera_set_fmt(struct soc_camera_device *icd,
1273 struct v4l2_format *f)
1274 {
1275 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
1276 struct mx2_camera_dev *pcdev = ici->priv;
1277 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1278 const struct soc_camera_format_xlate *xlate;
1279 struct v4l2_pix_format *pix = &f->fmt.pix;
1280 struct v4l2_mbus_framefmt mf;
1281 int ret;
1282
1283 dev_dbg(icd->parent, "%s: requested params: width = %d, height = %d\n",
1284 __func__, pix->width, pix->height);
1285
1286 xlate = soc_camera_xlate_by_fourcc(icd, pix->pixelformat);
1287 if (!xlate) {
1288 dev_warn(icd->parent, "Format %x not found\n",
1289 pix->pixelformat);
1290 return -EINVAL;
1291 }
1292
1293 mf.width = pix->width;
1294 mf.height = pix->height;
1295 mf.field = pix->field;
1296 mf.colorspace = pix->colorspace;
1297 mf.code = xlate->code;
1298
1299 ret = v4l2_subdev_call(sd, video, s_mbus_fmt, &mf);
1300 if (ret < 0 && ret != -ENOIOCTLCMD)
1301 return ret;
1302
1303 /* Store width and height returned by the sensor for resizing */
1304 pcdev->s_width = mf.width;
1305 pcdev->s_height = mf.height;
1306 dev_dbg(icd->parent, "%s: sensor params: width = %d, height = %d\n",
1307 __func__, pcdev->s_width, pcdev->s_height);
1308
1309 pcdev->emma_prp = mx27_emma_prp_get_format(xlate->code,
1310 xlate->host_fmt->fourcc);
1311
1312 memset(pcdev->resizing, 0, sizeof(pcdev->resizing));
1313 if ((mf.width != pix->width || mf.height != pix->height) &&
1314 pcdev->emma_prp->cfg.in_fmt == PRP_CNTL_DATA_IN_YUV422) {
1315 if (mx2_emmaprp_resize(pcdev, &mf, pix, true) < 0)
1316 dev_dbg(icd->parent, "%s: can't resize\n", __func__);
1317 }
1318
1319 if (mf.code != xlate->code)
1320 return -EINVAL;
1321
1322 pix->width = mf.width;
1323 pix->height = mf.height;
1324 pix->field = mf.field;
1325 pix->colorspace = mf.colorspace;
1326 icd->current_fmt = xlate;
1327
1328 dev_dbg(icd->parent, "%s: returned params: width = %d, height = %d\n",
1329 __func__, pix->width, pix->height);
1330
1331 return 0;
1332 }
1333
1334 static int mx2_camera_try_fmt(struct soc_camera_device *icd,
1335 struct v4l2_format *f)
1336 {
1337 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1338 const struct soc_camera_format_xlate *xlate;
1339 struct v4l2_pix_format *pix = &f->fmt.pix;
1340 struct v4l2_mbus_framefmt mf;
1341 __u32 pixfmt = pix->pixelformat;
1342 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
1343 struct mx2_camera_dev *pcdev = ici->priv;
1344 unsigned int width_limit;
1345 int ret;
1346
1347 dev_dbg(icd->parent, "%s: requested params: width = %d, height = %d\n",
1348 __func__, pix->width, pix->height);
1349
1350 xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
1351 if (pixfmt && !xlate) {
1352 dev_warn(icd->parent, "Format %x not found\n", pixfmt);
1353 return -EINVAL;
1354 }
1355
1356 /* FIXME: implement MX27 limits */
1357
1358 /* limit to MX25 hardware capabilities */
1359 if (cpu_is_mx25()) {
1360 if (xlate->host_fmt->bits_per_sample <= 8)
1361 width_limit = 0xffff * 4;
1362 else
1363 width_limit = 0xffff * 2;
1364 /* CSIIMAG_PARA limit */
1365 if (pix->width > width_limit)
1366 pix->width = width_limit;
1367 if (pix->height > 0xffff)
1368 pix->height = 0xffff;
1369
1370 pix->bytesperline = soc_mbus_bytes_per_line(pix->width,
1371 xlate->host_fmt);
1372 if (pix->bytesperline < 0)
1373 return pix->bytesperline;
1374 pix->sizeimage = soc_mbus_image_size(xlate->host_fmt,
1375 pix->bytesperline, pix->height);
1376 /* Check against the CSIRXCNT limit */
1377 if (pix->sizeimage > 4 * 0x3ffff) {
1378 /* Adjust geometry, preserve aspect ratio */
1379 unsigned int new_height = int_sqrt(div_u64(0x3ffffULL *
1380 4 * pix->height, pix->bytesperline));
1381 pix->width = new_height * pix->width / pix->height;
1382 pix->height = new_height;
1383 pix->bytesperline = soc_mbus_bytes_per_line(pix->width,
1384 xlate->host_fmt);
1385 BUG_ON(pix->bytesperline < 0);
1386 pix->sizeimage = soc_mbus_image_size(xlate->host_fmt,
1387 pix->bytesperline, pix->height);
1388 }
1389 }
1390
1391 /* limit to sensor capabilities */
1392 mf.width = pix->width;
1393 mf.height = pix->height;
1394 mf.field = pix->field;
1395 mf.colorspace = pix->colorspace;
1396 mf.code = xlate->code;
1397
1398 ret = v4l2_subdev_call(sd, video, try_mbus_fmt, &mf);
1399 if (ret < 0)
1400 return ret;
1401
1402 dev_dbg(icd->parent, "%s: sensor params: width = %d, height = %d\n",
1403 __func__, pcdev->s_width, pcdev->s_height);
1404
1405 /* If the sensor does not support image size try PrP resizing */
1406 pcdev->emma_prp = mx27_emma_prp_get_format(xlate->code,
1407 xlate->host_fmt->fourcc);
1408
1409 memset(pcdev->resizing, 0, sizeof(pcdev->resizing));
1410 if ((mf.width != pix->width || mf.height != pix->height) &&
1411 pcdev->emma_prp->cfg.in_fmt == PRP_CNTL_DATA_IN_YUV422) {
1412 if (mx2_emmaprp_resize(pcdev, &mf, pix, false) < 0)
1413 dev_dbg(icd->parent, "%s: can't resize\n", __func__);
1414 }
1415
1416 if (mf.field == V4L2_FIELD_ANY)
1417 mf.field = V4L2_FIELD_NONE;
1418 /*
1419 * Driver supports interlaced images provided they have
1420 * both fields so that they can be processed as if they
1421 * were progressive.
1422 */
1423 if (mf.field != V4L2_FIELD_NONE && !V4L2_FIELD_HAS_BOTH(mf.field)) {
1424 dev_err(icd->parent, "Field type %d unsupported.\n",
1425 mf.field);
1426 return -EINVAL;
1427 }
1428
1429 pix->width = mf.width;
1430 pix->height = mf.height;
1431 pix->field = mf.field;
1432 pix->colorspace = mf.colorspace;
1433
1434 dev_dbg(icd->parent, "%s: returned params: width = %d, height = %d\n",
1435 __func__, pix->width, pix->height);
1436
1437 return 0;
1438 }
1439
1440 static int mx2_camera_querycap(struct soc_camera_host *ici,
1441 struct v4l2_capability *cap)
1442 {
1443 /* cap->name is set by the friendly caller:-> */
1444 strlcpy(cap->card, MX2_CAM_DRIVER_DESCRIPTION, sizeof(cap->card));
1445 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
1446
1447 return 0;
1448 }
1449
1450 static unsigned int mx2_camera_poll(struct file *file, poll_table *pt)
1451 {
1452 struct soc_camera_device *icd = file->private_data;
1453
1454 return vb2_poll(&icd->vb2_vidq, file, pt);
1455 }
1456
1457 static struct soc_camera_host_ops mx2_soc_camera_host_ops = {
1458 .owner = THIS_MODULE,
1459 .add = mx2_camera_add_device,
1460 .remove = mx2_camera_remove_device,
1461 .set_fmt = mx2_camera_set_fmt,
1462 .set_crop = mx2_camera_set_crop,
1463 .get_formats = mx2_camera_get_formats,
1464 .try_fmt = mx2_camera_try_fmt,
1465 .init_videobuf2 = mx2_camera_init_videobuf,
1466 .poll = mx2_camera_poll,
1467 .querycap = mx2_camera_querycap,
1468 .set_bus_param = mx2_camera_set_bus_param,
1469 };
1470
1471 static void mx27_camera_frame_done_emma(struct mx2_camera_dev *pcdev,
1472 int bufnum, bool err)
1473 {
1474 #ifdef DEBUG
1475 struct mx2_fmt_cfg *prp = pcdev->emma_prp;
1476 #endif
1477 struct mx2_buf_internal *ibuf;
1478 struct mx2_buffer *buf;
1479 struct vb2_buffer *vb;
1480 unsigned long phys;
1481
1482 ibuf = list_first_entry(&pcdev->active_bufs, struct mx2_buf_internal,
1483 queue);
1484
1485 BUG_ON(ibuf->bufnum != bufnum);
1486
1487 if (ibuf->discard) {
1488 /*
1489 * Discard buffer must not be returned to user space.
1490 * Just return it to the discard queue.
1491 */
1492 list_move_tail(pcdev->active_bufs.next, &pcdev->discard);
1493 } else {
1494 buf = mx2_ibuf_to_buf(ibuf);
1495
1496 vb = &buf->vb;
1497 #ifdef DEBUG
1498 phys = vb2_dma_contig_plane_dma_addr(vb, 0);
1499 if (prp->cfg.channel == 1) {
1500 if (readl(pcdev->base_emma + PRP_DEST_RGB1_PTR +
1501 4 * bufnum) != phys) {
1502 dev_err(pcdev->dev, "%lx != %x\n", phys,
1503 readl(pcdev->base_emma +
1504 PRP_DEST_RGB1_PTR + 4 * bufnum));
1505 }
1506 } else {
1507 if (readl(pcdev->base_emma + PRP_DEST_Y_PTR -
1508 0x14 * bufnum) != phys) {
1509 dev_err(pcdev->dev, "%lx != %x\n", phys,
1510 readl(pcdev->base_emma +
1511 PRP_DEST_Y_PTR - 0x14 * bufnum));
1512 }
1513 }
1514 #endif
1515 dev_dbg(pcdev->dev, "%s (vb=0x%p) 0x%p %lu\n", __func__, vb,
1516 vb2_plane_vaddr(vb, 0),
1517 vb2_get_plane_payload(vb, 0));
1518
1519 list_del_init(&buf->internal.queue);
1520 do_gettimeofday(&vb->v4l2_buf.timestamp);
1521 vb->v4l2_buf.sequence = pcdev->frame_count;
1522 if (err)
1523 vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
1524 else
1525 vb2_buffer_done(vb, VB2_BUF_STATE_DONE);
1526 }
1527
1528 pcdev->frame_count++;
1529
1530 if (list_empty(&pcdev->capture)) {
1531 if (list_empty(&pcdev->discard)) {
1532 dev_warn(pcdev->dev, "%s: trying to access empty discard list\n",
1533 __func__);
1534 return;
1535 }
1536
1537 ibuf = list_first_entry(&pcdev->discard,
1538 struct mx2_buf_internal, queue);
1539 ibuf->bufnum = bufnum;
1540
1541 list_move_tail(pcdev->discard.next, &pcdev->active_bufs);
1542 mx27_update_emma_buf(pcdev, pcdev->discard_buffer_dma, bufnum);
1543 return;
1544 }
1545
1546 buf = list_first_entry(&pcdev->capture, struct mx2_buffer,
1547 internal.queue);
1548
1549 buf->internal.bufnum = bufnum;
1550
1551 list_move_tail(pcdev->capture.next, &pcdev->active_bufs);
1552
1553 vb = &buf->vb;
1554 buf->state = MX2_STATE_ACTIVE;
1555
1556 phys = vb2_dma_contig_plane_dma_addr(vb, 0);
1557 mx27_update_emma_buf(pcdev, phys, bufnum);
1558 }
1559
1560 static irqreturn_t mx27_camera_emma_irq(int irq_emma, void *data)
1561 {
1562 struct mx2_camera_dev *pcdev = data;
1563 unsigned int status = readl(pcdev->base_emma + PRP_INTRSTATUS);
1564 struct mx2_buf_internal *ibuf;
1565
1566 spin_lock(&pcdev->lock);
1567
1568 if (list_empty(&pcdev->active_bufs)) {
1569 dev_warn(pcdev->dev, "%s: called while active list is empty\n",
1570 __func__);
1571
1572 if (!status) {
1573 spin_unlock(&pcdev->lock);
1574 return IRQ_NONE;
1575 }
1576 }
1577
1578 if (status & (1 << 7)) { /* overflow */
1579 u32 cntl = readl(pcdev->base_emma + PRP_CNTL);
1580 writel(cntl & ~(PRP_CNTL_CH1EN | PRP_CNTL_CH2EN),
1581 pcdev->base_emma + PRP_CNTL);
1582 writel(cntl, pcdev->base_emma + PRP_CNTL);
1583
1584 ibuf = list_first_entry(&pcdev->active_bufs,
1585 struct mx2_buf_internal, queue);
1586 mx27_camera_frame_done_emma(pcdev,
1587 ibuf->bufnum, true);
1588
1589 status &= ~(1 << 7);
1590 } else if (((status & (3 << 5)) == (3 << 5)) ||
1591 ((status & (3 << 3)) == (3 << 3))) {
1592 /*
1593 * Both buffers have triggered, process the one we're expecting
1594 * to first
1595 */
1596 ibuf = list_first_entry(&pcdev->active_bufs,
1597 struct mx2_buf_internal, queue);
1598 mx27_camera_frame_done_emma(pcdev, ibuf->bufnum, false);
1599 status &= ~(1 << (6 - ibuf->bufnum)); /* mark processed */
1600 } else if ((status & (1 << 6)) || (status & (1 << 4))) {
1601 mx27_camera_frame_done_emma(pcdev, 0, false);
1602 } else if ((status & (1 << 5)) || (status & (1 << 3))) {
1603 mx27_camera_frame_done_emma(pcdev, 1, false);
1604 }
1605
1606 spin_unlock(&pcdev->lock);
1607 writel(status, pcdev->base_emma + PRP_INTRSTATUS);
1608
1609 return IRQ_HANDLED;
1610 }
1611
1612 static int __devinit mx27_camera_emma_init(struct mx2_camera_dev *pcdev)
1613 {
1614 struct resource *res_emma = pcdev->res_emma;
1615 int err = 0;
1616
1617 if (!request_mem_region(res_emma->start, resource_size(res_emma),
1618 MX2_CAM_DRV_NAME)) {
1619 err = -EBUSY;
1620 goto out;
1621 }
1622
1623 pcdev->base_emma = ioremap(res_emma->start, resource_size(res_emma));
1624 if (!pcdev->base_emma) {
1625 err = -ENOMEM;
1626 goto exit_release;
1627 }
1628
1629 err = request_irq(pcdev->irq_emma, mx27_camera_emma_irq, 0,
1630 MX2_CAM_DRV_NAME, pcdev);
1631 if (err) {
1632 dev_err(pcdev->dev, "Camera EMMA interrupt register failed \n");
1633 goto exit_iounmap;
1634 }
1635
1636 pcdev->clk_emma = clk_get(NULL, "emma");
1637 if (IS_ERR(pcdev->clk_emma)) {
1638 err = PTR_ERR(pcdev->clk_emma);
1639 goto exit_free_irq;
1640 }
1641
1642 clk_enable(pcdev->clk_emma);
1643
1644 err = mx27_camera_emma_prp_reset(pcdev);
1645 if (err)
1646 goto exit_clk_emma_put;
1647
1648 return err;
1649
1650 exit_clk_emma_put:
1651 clk_disable(pcdev->clk_emma);
1652 clk_put(pcdev->clk_emma);
1653 exit_free_irq:
1654 free_irq(pcdev->irq_emma, pcdev);
1655 exit_iounmap:
1656 iounmap(pcdev->base_emma);
1657 exit_release:
1658 release_mem_region(res_emma->start, resource_size(res_emma));
1659 out:
1660 return err;
1661 }
1662
1663 static int __devinit mx2_camera_probe(struct platform_device *pdev)
1664 {
1665 struct mx2_camera_dev *pcdev;
1666 struct resource *res_csi, *res_emma;
1667 void __iomem *base_csi;
1668 int irq_csi, irq_emma;
1669 int err = 0;
1670
1671 dev_dbg(&pdev->dev, "initialising\n");
1672
1673 res_csi = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1674 irq_csi = platform_get_irq(pdev, 0);
1675 if (res_csi == NULL || irq_csi < 0) {
1676 dev_err(&pdev->dev, "Missing platform resources data\n");
1677 err = -ENODEV;
1678 goto exit;
1679 }
1680
1681 pcdev = kzalloc(sizeof(*pcdev), GFP_KERNEL);
1682 if (!pcdev) {
1683 dev_err(&pdev->dev, "Could not allocate pcdev\n");
1684 err = -ENOMEM;
1685 goto exit;
1686 }
1687
1688 pcdev->clk_csi = clk_get(&pdev->dev, NULL);
1689 if (IS_ERR(pcdev->clk_csi)) {
1690 dev_err(&pdev->dev, "Could not get csi clock\n");
1691 err = PTR_ERR(pcdev->clk_csi);
1692 goto exit_kfree;
1693 }
1694
1695 pcdev->res_csi = res_csi;
1696 pcdev->pdata = pdev->dev.platform_data;
1697 if (pcdev->pdata) {
1698 long rate;
1699
1700 pcdev->platform_flags = pcdev->pdata->flags;
1701
1702 rate = clk_round_rate(pcdev->clk_csi, pcdev->pdata->clk * 2);
1703 if (rate <= 0) {
1704 err = -ENODEV;
1705 goto exit_dma_free;
1706 }
1707 err = clk_set_rate(pcdev->clk_csi, rate);
1708 if (err < 0)
1709 goto exit_dma_free;
1710 }
1711
1712 INIT_LIST_HEAD(&pcdev->capture);
1713 INIT_LIST_HEAD(&pcdev->active_bufs);
1714 INIT_LIST_HEAD(&pcdev->discard);
1715 spin_lock_init(&pcdev->lock);
1716
1717 /*
1718 * Request the regions.
1719 */
1720 if (!request_mem_region(res_csi->start, resource_size(res_csi),
1721 MX2_CAM_DRV_NAME)) {
1722 err = -EBUSY;
1723 goto exit_dma_free;
1724 }
1725
1726 base_csi = ioremap(res_csi->start, resource_size(res_csi));
1727 if (!base_csi) {
1728 err = -ENOMEM;
1729 goto exit_release;
1730 }
1731 pcdev->irq_csi = irq_csi;
1732 pcdev->base_csi = base_csi;
1733 pcdev->base_dma = res_csi->start;
1734 pcdev->dev = &pdev->dev;
1735
1736 if (cpu_is_mx25()) {
1737 err = request_irq(pcdev->irq_csi, mx25_camera_irq, 0,
1738 MX2_CAM_DRV_NAME, pcdev);
1739 if (err) {
1740 dev_err(pcdev->dev, "Camera interrupt register failed \n");
1741 goto exit_iounmap;
1742 }
1743 }
1744
1745 if (cpu_is_mx27()) {
1746 /* EMMA support */
1747 res_emma = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1748 irq_emma = platform_get_irq(pdev, 1);
1749
1750 if (!res_emma || !irq_emma) {
1751 dev_err(&pdev->dev, "no EMMA resources\n");
1752 goto exit_free_irq;
1753 }
1754
1755 pcdev->res_emma = res_emma;
1756 pcdev->irq_emma = irq_emma;
1757 if (mx27_camera_emma_init(pcdev))
1758 goto exit_free_irq;
1759 }
1760
1761 pcdev->soc_host.drv_name = MX2_CAM_DRV_NAME,
1762 pcdev->soc_host.ops = &mx2_soc_camera_host_ops,
1763 pcdev->soc_host.priv = pcdev;
1764 pcdev->soc_host.v4l2_dev.dev = &pdev->dev;
1765 pcdev->soc_host.nr = pdev->id;
1766 if (cpu_is_mx25())
1767 pcdev->soc_host.capabilities = SOCAM_HOST_CAP_STRIDE;
1768
1769 pcdev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
1770 if (IS_ERR(pcdev->alloc_ctx)) {
1771 err = PTR_ERR(pcdev->alloc_ctx);
1772 goto eallocctx;
1773 }
1774 err = soc_camera_host_register(&pcdev->soc_host);
1775 if (err)
1776 goto exit_free_emma;
1777
1778 dev_info(&pdev->dev, "MX2 Camera (CSI) driver probed, clock frequency: %ld\n",
1779 clk_get_rate(pcdev->clk_csi));
1780
1781 return 0;
1782
1783 exit_free_emma:
1784 vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
1785 eallocctx:
1786 if (cpu_is_mx27()) {
1787 free_irq(pcdev->irq_emma, pcdev);
1788 clk_disable(pcdev->clk_emma);
1789 clk_put(pcdev->clk_emma);
1790 iounmap(pcdev->base_emma);
1791 release_mem_region(pcdev->res_emma->start, resource_size(pcdev->res_emma));
1792 }
1793 exit_free_irq:
1794 if (cpu_is_mx25())
1795 free_irq(pcdev->irq_csi, pcdev);
1796 exit_iounmap:
1797 iounmap(base_csi);
1798 exit_release:
1799 release_mem_region(res_csi->start, resource_size(res_csi));
1800 exit_dma_free:
1801 clk_put(pcdev->clk_csi);
1802 exit_kfree:
1803 kfree(pcdev);
1804 exit:
1805 return err;
1806 }
1807
1808 static int __devexit mx2_camera_remove(struct platform_device *pdev)
1809 {
1810 struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev);
1811 struct mx2_camera_dev *pcdev = container_of(soc_host,
1812 struct mx2_camera_dev, soc_host);
1813 struct resource *res;
1814
1815 clk_put(pcdev->clk_csi);
1816 if (cpu_is_mx25())
1817 free_irq(pcdev->irq_csi, pcdev);
1818 if (cpu_is_mx27())
1819 free_irq(pcdev->irq_emma, pcdev);
1820
1821 soc_camera_host_unregister(&pcdev->soc_host);
1822
1823 vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
1824
1825 iounmap(pcdev->base_csi);
1826
1827 if (cpu_is_mx27()) {
1828 clk_disable(pcdev->clk_emma);
1829 clk_put(pcdev->clk_emma);
1830 iounmap(pcdev->base_emma);
1831 res = pcdev->res_emma;
1832 release_mem_region(res->start, resource_size(res));
1833 }
1834
1835 res = pcdev->res_csi;
1836 release_mem_region(res->start, resource_size(res));
1837
1838 kfree(pcdev);
1839
1840 dev_info(&pdev->dev, "MX2 Camera driver unloaded\n");
1841
1842 return 0;
1843 }
1844
1845 static struct platform_driver mx2_camera_driver = {
1846 .driver = {
1847 .name = MX2_CAM_DRV_NAME,
1848 },
1849 .remove = __devexit_p(mx2_camera_remove),
1850 };
1851
1852
1853 static int __init mx2_camera_init(void)
1854 {
1855 return platform_driver_probe(&mx2_camera_driver, &mx2_camera_probe);
1856 }
1857
1858 static void __exit mx2_camera_exit(void)
1859 {
1860 return platform_driver_unregister(&mx2_camera_driver);
1861 }
1862
1863 module_init(mx2_camera_init);
1864 module_exit(mx2_camera_exit);
1865
1866 MODULE_DESCRIPTION("i.MX27/i.MX25 SoC Camera Host driver");
1867 MODULE_AUTHOR("Sascha Hauer <sha@pengutronix.de>");
1868 MODULE_LICENSE("GPL");
1869 MODULE_VERSION(MX2_CAM_VERSION);
Linux kernel - Deliverables
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