1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * V4L2 Driver for PXA camera host
5 * Copyright (C) 2006, Sascha Hauer, Pengutronix
6 * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
7 * Copyright (C) 2016, Robert Jarzmik <robert.jarzmik@free.fr>
10 #include <linux/init.h>
11 #include <linux/module.h>
13 #include <linux/delay.h>
14 #include <linux/device.h>
15 #include <linux/dma-mapping.h>
16 #include <linux/err.h>
17 #include <linux/errno.h>
19 #include <linux/interrupt.h>
20 #include <linux/kernel.h>
22 #include <linux/moduleparam.h>
24 #include <linux/of_graph.h>
25 #include <linux/time.h>
26 #include <linux/platform_device.h>
27 #include <linux/clk.h>
28 #include <linux/sched.h>
29 #include <linux/slab.h>
30 #include <linux/dmaengine.h>
31 #include <linux/dma/pxa-dma.h>
33 #include <media/v4l2-async.h>
34 #include <media/v4l2-common.h>
35 #include <media/v4l2-ctrls.h>
36 #include <media/v4l2-device.h>
37 #include <media/v4l2-event.h>
38 #include <media/v4l2-ioctl.h>
39 #include <media/v4l2-fwnode.h>
41 #include <media/videobuf2-dma-sg.h>
43 #include <linux/videodev2.h>
45 #include <linux/platform_data/media/camera-pxa.h>
47 #define PXA_CAM_VERSION "0.0.6"
48 #define PXA_CAM_DRV_NAME "pxa27x-camera"
50 #define DEFAULT_WIDTH 640
51 #define DEFAULT_HEIGHT 480
53 /* Camera Interface */
66 #define CICR0_DMAEN (1UL << 31) /* DMA request enable */
67 #define CICR0_PAR_EN (1 << 30) /* Parity enable */
68 #define CICR0_SL_CAP_EN (1 << 29) /* Capture enable for slave mode */
69 #define CICR0_ENB (1 << 28) /* Camera interface enable */
70 #define CICR0_DIS (1 << 27) /* Camera interface disable */
71 #define CICR0_SIM (0x7 << 24) /* Sensor interface mode mask */
72 #define CICR0_TOM (1 << 9) /* Time-out mask */
73 #define CICR0_RDAVM (1 << 8) /* Receive-data-available mask */
74 #define CICR0_FEM (1 << 7) /* FIFO-empty mask */
75 #define CICR0_EOLM (1 << 6) /* End-of-line mask */
76 #define CICR0_PERRM (1 << 5) /* Parity-error mask */
77 #define CICR0_QDM (1 << 4) /* Quick-disable mask */
78 #define CICR0_CDM (1 << 3) /* Disable-done mask */
79 #define CICR0_SOFM (1 << 2) /* Start-of-frame mask */
80 #define CICR0_EOFM (1 << 1) /* End-of-frame mask */
81 #define CICR0_FOM (1 << 0) /* FIFO-overrun mask */
83 #define CICR1_TBIT (1UL << 31) /* Transparency bit */
84 #define CICR1_RGBT_CONV (0x3 << 29) /* RGBT conversion mask */
85 #define CICR1_PPL (0x7ff << 15) /* Pixels per line mask */
86 #define CICR1_RGB_CONV (0x7 << 12) /* RGB conversion mask */
87 #define CICR1_RGB_F (1 << 11) /* RGB format */
88 #define CICR1_YCBCR_F (1 << 10) /* YCbCr format */
89 #define CICR1_RGB_BPP (0x7 << 7) /* RGB bis per pixel mask */
90 #define CICR1_RAW_BPP (0x3 << 5) /* Raw bis per pixel mask */
91 #define CICR1_COLOR_SP (0x3 << 3) /* Color space mask */
92 #define CICR1_DW (0x7 << 0) /* Data width mask */
94 #define CICR2_BLW (0xff << 24) /* Beginning-of-line pixel clock
96 #define CICR2_ELW (0xff << 16) /* End-of-line pixel clock
98 #define CICR2_HSW (0x3f << 10) /* Horizontal sync pulse width mask */
99 #define CICR2_BFPW (0x3f << 3) /* Beginning-of-frame pixel clock
101 #define CICR2_FSW (0x7 << 0) /* Frame stabilization
104 #define CICR3_BFW (0xff << 24) /* Beginning-of-frame line clock
106 #define CICR3_EFW (0xff << 16) /* End-of-frame line clock
108 #define CICR3_VSW (0x3f << 10) /* Vertical sync pulse width mask */
109 #define CICR3_BFPW (0x3f << 3) /* Beginning-of-frame pixel clock
111 #define CICR3_LPF (0x7ff << 0) /* Lines per frame mask */
113 #define CICR4_MCLK_DLY (0x3 << 24) /* MCLK Data Capture Delay mask */
114 #define CICR4_PCLK_EN (1 << 23) /* Pixel clock enable */
115 #define CICR4_PCP (1 << 22) /* Pixel clock polarity */
116 #define CICR4_HSP (1 << 21) /* Horizontal sync polarity */
117 #define CICR4_VSP (1 << 20) /* Vertical sync polarity */
118 #define CICR4_MCLK_EN (1 << 19) /* MCLK enable */
119 #define CICR4_FR_RATE (0x7 << 8) /* Frame rate mask */
120 #define CICR4_DIV (0xff << 0) /* Clock divisor mask */
122 #define CISR_FTO (1 << 15) /* FIFO time-out */
123 #define CISR_RDAV_2 (1 << 14) /* Channel 2 receive data available */
124 #define CISR_RDAV_1 (1 << 13) /* Channel 1 receive data available */
125 #define CISR_RDAV_0 (1 << 12) /* Channel 0 receive data available */
126 #define CISR_FEMPTY_2 (1 << 11) /* Channel 2 FIFO empty */
127 #define CISR_FEMPTY_1 (1 << 10) /* Channel 1 FIFO empty */
128 #define CISR_FEMPTY_0 (1 << 9) /* Channel 0 FIFO empty */
129 #define CISR_EOL (1 << 8) /* End of line */
130 #define CISR_PAR_ERR (1 << 7) /* Parity error */
131 #define CISR_CQD (1 << 6) /* Camera interface quick disable */
132 #define CISR_CDD (1 << 5) /* Camera interface disable done */
133 #define CISR_SOF (1 << 4) /* Start of frame */
134 #define CISR_EOF (1 << 3) /* End of frame */
135 #define CISR_IFO_2 (1 << 2) /* FIFO overrun for Channel 2 */
136 #define CISR_IFO_1 (1 << 1) /* FIFO overrun for Channel 1 */
137 #define CISR_IFO_0 (1 << 0) /* FIFO overrun for Channel 0 */
139 #define CIFR_FLVL2 (0x7f << 23) /* FIFO 2 level mask */
140 #define CIFR_FLVL1 (0x7f << 16) /* FIFO 1 level mask */
141 #define CIFR_FLVL0 (0xff << 8) /* FIFO 0 level mask */
142 #define CIFR_THL_0 (0x3 << 4) /* Threshold Level for Channel 0 FIFO */
143 #define CIFR_RESET_F (1 << 3) /* Reset input FIFOs */
144 #define CIFR_FEN2 (1 << 2) /* FIFO enable for channel 2 */
145 #define CIFR_FEN1 (1 << 1) /* FIFO enable for channel 1 */
146 #define CIFR_FEN0 (1 << 0) /* FIFO enable for channel 0 */
148 #define CICR0_SIM_MP (0 << 24)
149 #define CICR0_SIM_SP (1 << 24)
150 #define CICR0_SIM_MS (2 << 24)
151 #define CICR0_SIM_EP (3 << 24)
152 #define CICR0_SIM_ES (4 << 24)
154 #define CICR1_DW_VAL(x) ((x) & CICR1_DW) /* Data bus width */
155 #define CICR1_PPL_VAL(x) (((x) << 15) & CICR1_PPL) /* Pixels per line */
156 #define CICR1_COLOR_SP_VAL(x) (((x) << 3) & CICR1_COLOR_SP) /* color space */
157 #define CICR1_RGB_BPP_VAL(x) (((x) << 7) & CICR1_RGB_BPP) /* bpp for rgb */
158 #define CICR1_RGBT_CONV_VAL(x) (((x) << 29) & CICR1_RGBT_CONV) /* rgbt conv */
160 #define CICR2_BLW_VAL(x) (((x) << 24) & CICR2_BLW) /* Beginning-of-line pixel clock wait count */
161 #define CICR2_ELW_VAL(x) (((x) << 16) & CICR2_ELW) /* End-of-line pixel clock wait count */
162 #define CICR2_HSW_VAL(x) (((x) << 10) & CICR2_HSW) /* Horizontal sync pulse width */
163 #define CICR2_BFPW_VAL(x) (((x) << 3) & CICR2_BFPW) /* Beginning-of-frame pixel clock wait count */
164 #define CICR2_FSW_VAL(x) (((x) << 0) & CICR2_FSW) /* Frame stabilization wait count */
166 #define CICR3_BFW_VAL(x) (((x) << 24) & CICR3_BFW) /* Beginning-of-frame line clock wait count */
167 #define CICR3_EFW_VAL(x) (((x) << 16) & CICR3_EFW) /* End-of-frame line clock wait count */
168 #define CICR3_VSW_VAL(x) (((x) << 11) & CICR3_VSW) /* Vertical sync pulse width */
169 #define CICR3_LPF_VAL(x) (((x) << 0) & CICR3_LPF) /* Lines per frame */
171 #define CICR0_IRQ_MASK (CICR0_TOM | CICR0_RDAVM | CICR0_FEM | CICR0_EOLM | \
172 CICR0_PERRM | CICR0_QDM | CICR0_CDM | CICR0_SOFM | \
173 CICR0_EOFM | CICR0_FOM)
175 #define sensor_call(cam, o, f, args...) \
176 v4l2_subdev_call(cam->sensor, o, f, ##args)
183 * enum pxa_mbus_packing - data packing types on the media-bus
184 * @PXA_MBUS_PACKING_NONE: no packing, bit-for-bit transfer to RAM, one
185 * sample represents one pixel
186 * @PXA_MBUS_PACKING_2X8_PADHI: 16 bits transferred in 2 8-bit samples, in the
187 * possibly incomplete byte high bits are padding
188 * @PXA_MBUS_PACKING_EXTEND16: sample width (e.g., 10 bits) has to be extended
191 enum pxa_mbus_packing
{
192 PXA_MBUS_PACKING_NONE
,
193 PXA_MBUS_PACKING_2X8_PADHI
,
194 PXA_MBUS_PACKING_EXTEND16
,
198 * enum pxa_mbus_order - sample order on the media bus
199 * @PXA_MBUS_ORDER_LE: least significant sample first
200 * @PXA_MBUS_ORDER_BE: most significant sample first
202 enum pxa_mbus_order
{
208 * enum pxa_mbus_layout - planes layout in memory
209 * @PXA_MBUS_LAYOUT_PACKED: color components packed
210 * @PXA_MBUS_LAYOUT_PLANAR_2Y_U_V: YUV components stored in 3 planes (4:2:2)
211 * @PXA_MBUS_LAYOUT_PLANAR_2Y_C: YUV components stored in a luma and a
212 * chroma plane (C plane is half the size
214 * @PXA_MBUS_LAYOUT_PLANAR_Y_C: YUV components stored in a luma and a
215 * chroma plane (C plane is the same size
218 enum pxa_mbus_layout
{
219 PXA_MBUS_LAYOUT_PACKED
= 0,
220 PXA_MBUS_LAYOUT_PLANAR_2Y_U_V
,
221 PXA_MBUS_LAYOUT_PLANAR_2Y_C
,
222 PXA_MBUS_LAYOUT_PLANAR_Y_C
,
226 * struct pxa_mbus_pixelfmt - Data format on the media bus
227 * @name: Name of the format
228 * @fourcc: Fourcc code, that will be obtained if the data is
229 * stored in memory in the following way:
230 * @packing: Type of sample-packing, that has to be used
231 * @order: Sample order when storing in memory
232 * @layout: Planes layout in memory
233 * @bits_per_sample: How many bits the bridge has to sample
235 struct pxa_mbus_pixelfmt
{
238 enum pxa_mbus_packing packing
;
239 enum pxa_mbus_order order
;
240 enum pxa_mbus_layout layout
;
245 * struct pxa_mbus_lookup - Lookup FOURCC IDs by mediabus codes for pass-through
246 * @code: mediabus pixel-code
247 * @fmt: pixel format description
249 struct pxa_mbus_lookup
{
251 struct pxa_mbus_pixelfmt fmt
;
254 static const struct pxa_mbus_lookup mbus_fmt
[] = {
256 .code
= MEDIA_BUS_FMT_YUYV8_2X8
,
258 .fourcc
= V4L2_PIX_FMT_YUYV
,
260 .bits_per_sample
= 8,
261 .packing
= PXA_MBUS_PACKING_2X8_PADHI
,
262 .order
= PXA_MBUS_ORDER_LE
,
263 .layout
= PXA_MBUS_LAYOUT_PACKED
,
266 .code
= MEDIA_BUS_FMT_YVYU8_2X8
,
268 .fourcc
= V4L2_PIX_FMT_YVYU
,
270 .bits_per_sample
= 8,
271 .packing
= PXA_MBUS_PACKING_2X8_PADHI
,
272 .order
= PXA_MBUS_ORDER_LE
,
273 .layout
= PXA_MBUS_LAYOUT_PACKED
,
276 .code
= MEDIA_BUS_FMT_UYVY8_2X8
,
278 .fourcc
= V4L2_PIX_FMT_UYVY
,
280 .bits_per_sample
= 8,
281 .packing
= PXA_MBUS_PACKING_2X8_PADHI
,
282 .order
= PXA_MBUS_ORDER_LE
,
283 .layout
= PXA_MBUS_LAYOUT_PACKED
,
286 .code
= MEDIA_BUS_FMT_VYUY8_2X8
,
288 .fourcc
= V4L2_PIX_FMT_VYUY
,
290 .bits_per_sample
= 8,
291 .packing
= PXA_MBUS_PACKING_2X8_PADHI
,
292 .order
= PXA_MBUS_ORDER_LE
,
293 .layout
= PXA_MBUS_LAYOUT_PACKED
,
296 .code
= MEDIA_BUS_FMT_RGB555_2X8_PADHI_LE
,
298 .fourcc
= V4L2_PIX_FMT_RGB555
,
300 .bits_per_sample
= 8,
301 .packing
= PXA_MBUS_PACKING_2X8_PADHI
,
302 .order
= PXA_MBUS_ORDER_LE
,
303 .layout
= PXA_MBUS_LAYOUT_PACKED
,
306 .code
= MEDIA_BUS_FMT_RGB555_2X8_PADHI_BE
,
308 .fourcc
= V4L2_PIX_FMT_RGB555X
,
310 .bits_per_sample
= 8,
311 .packing
= PXA_MBUS_PACKING_2X8_PADHI
,
312 .order
= PXA_MBUS_ORDER_BE
,
313 .layout
= PXA_MBUS_LAYOUT_PACKED
,
316 .code
= MEDIA_BUS_FMT_RGB565_2X8_LE
,
318 .fourcc
= V4L2_PIX_FMT_RGB565
,
320 .bits_per_sample
= 8,
321 .packing
= PXA_MBUS_PACKING_2X8_PADHI
,
322 .order
= PXA_MBUS_ORDER_LE
,
323 .layout
= PXA_MBUS_LAYOUT_PACKED
,
326 .code
= MEDIA_BUS_FMT_RGB565_2X8_BE
,
328 .fourcc
= V4L2_PIX_FMT_RGB565X
,
330 .bits_per_sample
= 8,
331 .packing
= PXA_MBUS_PACKING_2X8_PADHI
,
332 .order
= PXA_MBUS_ORDER_BE
,
333 .layout
= PXA_MBUS_LAYOUT_PACKED
,
336 .code
= MEDIA_BUS_FMT_SBGGR8_1X8
,
338 .fourcc
= V4L2_PIX_FMT_SBGGR8
,
339 .name
= "Bayer 8 BGGR",
340 .bits_per_sample
= 8,
341 .packing
= PXA_MBUS_PACKING_NONE
,
342 .order
= PXA_MBUS_ORDER_LE
,
343 .layout
= PXA_MBUS_LAYOUT_PACKED
,
346 .code
= MEDIA_BUS_FMT_SGBRG8_1X8
,
348 .fourcc
= V4L2_PIX_FMT_SGBRG8
,
349 .name
= "Bayer 8 GBRG",
350 .bits_per_sample
= 8,
351 .packing
= PXA_MBUS_PACKING_NONE
,
352 .order
= PXA_MBUS_ORDER_LE
,
353 .layout
= PXA_MBUS_LAYOUT_PACKED
,
356 .code
= MEDIA_BUS_FMT_SGRBG8_1X8
,
358 .fourcc
= V4L2_PIX_FMT_SGRBG8
,
359 .name
= "Bayer 8 GRBG",
360 .bits_per_sample
= 8,
361 .packing
= PXA_MBUS_PACKING_NONE
,
362 .order
= PXA_MBUS_ORDER_LE
,
363 .layout
= PXA_MBUS_LAYOUT_PACKED
,
366 .code
= MEDIA_BUS_FMT_SRGGB8_1X8
,
368 .fourcc
= V4L2_PIX_FMT_SRGGB8
,
369 .name
= "Bayer 8 RGGB",
370 .bits_per_sample
= 8,
371 .packing
= PXA_MBUS_PACKING_NONE
,
372 .order
= PXA_MBUS_ORDER_LE
,
373 .layout
= PXA_MBUS_LAYOUT_PACKED
,
376 .code
= MEDIA_BUS_FMT_SBGGR10_1X10
,
378 .fourcc
= V4L2_PIX_FMT_SBGGR10
,
379 .name
= "Bayer 10 BGGR",
380 .bits_per_sample
= 10,
381 .packing
= PXA_MBUS_PACKING_EXTEND16
,
382 .order
= PXA_MBUS_ORDER_LE
,
383 .layout
= PXA_MBUS_LAYOUT_PACKED
,
386 .code
= MEDIA_BUS_FMT_Y8_1X8
,
388 .fourcc
= V4L2_PIX_FMT_GREY
,
390 .bits_per_sample
= 8,
391 .packing
= PXA_MBUS_PACKING_NONE
,
392 .order
= PXA_MBUS_ORDER_LE
,
393 .layout
= PXA_MBUS_LAYOUT_PACKED
,
396 .code
= MEDIA_BUS_FMT_Y10_1X10
,
398 .fourcc
= V4L2_PIX_FMT_Y10
,
399 .name
= "Grey 10bit",
400 .bits_per_sample
= 10,
401 .packing
= PXA_MBUS_PACKING_EXTEND16
,
402 .order
= PXA_MBUS_ORDER_LE
,
403 .layout
= PXA_MBUS_LAYOUT_PACKED
,
406 .code
= MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_LE
,
408 .fourcc
= V4L2_PIX_FMT_SBGGR10
,
409 .name
= "Bayer 10 BGGR",
410 .bits_per_sample
= 8,
411 .packing
= PXA_MBUS_PACKING_2X8_PADHI
,
412 .order
= PXA_MBUS_ORDER_LE
,
413 .layout
= PXA_MBUS_LAYOUT_PACKED
,
416 .code
= MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_BE
,
418 .fourcc
= V4L2_PIX_FMT_SBGGR10
,
419 .name
= "Bayer 10 BGGR",
420 .bits_per_sample
= 8,
421 .packing
= PXA_MBUS_PACKING_2X8_PADHI
,
422 .order
= PXA_MBUS_ORDER_BE
,
423 .layout
= PXA_MBUS_LAYOUT_PACKED
,
426 .code
= MEDIA_BUS_FMT_RGB444_2X8_PADHI_BE
,
428 .fourcc
= V4L2_PIX_FMT_RGB444
,
430 .bits_per_sample
= 8,
431 .packing
= PXA_MBUS_PACKING_2X8_PADHI
,
432 .order
= PXA_MBUS_ORDER_BE
,
433 .layout
= PXA_MBUS_LAYOUT_PACKED
,
436 .code
= MEDIA_BUS_FMT_UYVY8_1X16
,
438 .fourcc
= V4L2_PIX_FMT_UYVY
,
439 .name
= "UYVY 16bit",
440 .bits_per_sample
= 16,
441 .packing
= PXA_MBUS_PACKING_EXTEND16
,
442 .order
= PXA_MBUS_ORDER_LE
,
443 .layout
= PXA_MBUS_LAYOUT_PACKED
,
446 .code
= MEDIA_BUS_FMT_VYUY8_1X16
,
448 .fourcc
= V4L2_PIX_FMT_VYUY
,
449 .name
= "VYUY 16bit",
450 .bits_per_sample
= 16,
451 .packing
= PXA_MBUS_PACKING_EXTEND16
,
452 .order
= PXA_MBUS_ORDER_LE
,
453 .layout
= PXA_MBUS_LAYOUT_PACKED
,
456 .code
= MEDIA_BUS_FMT_YUYV8_1X16
,
458 .fourcc
= V4L2_PIX_FMT_YUYV
,
459 .name
= "YUYV 16bit",
460 .bits_per_sample
= 16,
461 .packing
= PXA_MBUS_PACKING_EXTEND16
,
462 .order
= PXA_MBUS_ORDER_LE
,
463 .layout
= PXA_MBUS_LAYOUT_PACKED
,
466 .code
= MEDIA_BUS_FMT_YVYU8_1X16
,
468 .fourcc
= V4L2_PIX_FMT_YVYU
,
469 .name
= "YVYU 16bit",
470 .bits_per_sample
= 16,
471 .packing
= PXA_MBUS_PACKING_EXTEND16
,
472 .order
= PXA_MBUS_ORDER_LE
,
473 .layout
= PXA_MBUS_LAYOUT_PACKED
,
476 .code
= MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8
,
478 .fourcc
= V4L2_PIX_FMT_SGRBG10DPCM8
,
479 .name
= "Bayer 10 BGGR DPCM 8",
480 .bits_per_sample
= 8,
481 .packing
= PXA_MBUS_PACKING_NONE
,
482 .order
= PXA_MBUS_ORDER_LE
,
483 .layout
= PXA_MBUS_LAYOUT_PACKED
,
486 .code
= MEDIA_BUS_FMT_SGBRG10_1X10
,
488 .fourcc
= V4L2_PIX_FMT_SGBRG10
,
489 .name
= "Bayer 10 GBRG",
490 .bits_per_sample
= 10,
491 .packing
= PXA_MBUS_PACKING_EXTEND16
,
492 .order
= PXA_MBUS_ORDER_LE
,
493 .layout
= PXA_MBUS_LAYOUT_PACKED
,
496 .code
= MEDIA_BUS_FMT_SGRBG10_1X10
,
498 .fourcc
= V4L2_PIX_FMT_SGRBG10
,
499 .name
= "Bayer 10 GRBG",
500 .bits_per_sample
= 10,
501 .packing
= PXA_MBUS_PACKING_EXTEND16
,
502 .order
= PXA_MBUS_ORDER_LE
,
503 .layout
= PXA_MBUS_LAYOUT_PACKED
,
506 .code
= MEDIA_BUS_FMT_SRGGB10_1X10
,
508 .fourcc
= V4L2_PIX_FMT_SRGGB10
,
509 .name
= "Bayer 10 RGGB",
510 .bits_per_sample
= 10,
511 .packing
= PXA_MBUS_PACKING_EXTEND16
,
512 .order
= PXA_MBUS_ORDER_LE
,
513 .layout
= PXA_MBUS_LAYOUT_PACKED
,
516 .code
= MEDIA_BUS_FMT_SBGGR12_1X12
,
518 .fourcc
= V4L2_PIX_FMT_SBGGR12
,
519 .name
= "Bayer 12 BGGR",
520 .bits_per_sample
= 12,
521 .packing
= PXA_MBUS_PACKING_EXTEND16
,
522 .order
= PXA_MBUS_ORDER_LE
,
523 .layout
= PXA_MBUS_LAYOUT_PACKED
,
526 .code
= MEDIA_BUS_FMT_SGBRG12_1X12
,
528 .fourcc
= V4L2_PIX_FMT_SGBRG12
,
529 .name
= "Bayer 12 GBRG",
530 .bits_per_sample
= 12,
531 .packing
= PXA_MBUS_PACKING_EXTEND16
,
532 .order
= PXA_MBUS_ORDER_LE
,
533 .layout
= PXA_MBUS_LAYOUT_PACKED
,
536 .code
= MEDIA_BUS_FMT_SGRBG12_1X12
,
538 .fourcc
= V4L2_PIX_FMT_SGRBG12
,
539 .name
= "Bayer 12 GRBG",
540 .bits_per_sample
= 12,
541 .packing
= PXA_MBUS_PACKING_EXTEND16
,
542 .order
= PXA_MBUS_ORDER_LE
,
543 .layout
= PXA_MBUS_LAYOUT_PACKED
,
546 .code
= MEDIA_BUS_FMT_SRGGB12_1X12
,
548 .fourcc
= V4L2_PIX_FMT_SRGGB12
,
549 .name
= "Bayer 12 RGGB",
550 .bits_per_sample
= 12,
551 .packing
= PXA_MBUS_PACKING_EXTEND16
,
552 .order
= PXA_MBUS_ORDER_LE
,
553 .layout
= PXA_MBUS_LAYOUT_PACKED
,
558 static s32
pxa_mbus_bytes_per_line(u32 width
, const struct pxa_mbus_pixelfmt
*mf
)
560 if (mf
->layout
!= PXA_MBUS_LAYOUT_PACKED
)
561 return width
* mf
->bits_per_sample
/ 8;
563 switch (mf
->packing
) {
564 case PXA_MBUS_PACKING_NONE
:
565 return width
* mf
->bits_per_sample
/ 8;
566 case PXA_MBUS_PACKING_2X8_PADHI
:
567 case PXA_MBUS_PACKING_EXTEND16
:
573 static s32
pxa_mbus_image_size(const struct pxa_mbus_pixelfmt
*mf
,
574 u32 bytes_per_line
, u32 height
)
576 if (mf
->layout
== PXA_MBUS_LAYOUT_PACKED
)
577 return bytes_per_line
* height
;
579 switch (mf
->packing
) {
580 case PXA_MBUS_PACKING_2X8_PADHI
:
581 return bytes_per_line
* height
* 2;
587 static const struct pxa_mbus_pixelfmt
*pxa_mbus_find_fmtdesc(
589 const struct pxa_mbus_lookup
*lookup
,
594 for (i
= 0; i
< n
; i
++)
595 if (lookup
[i
].code
== code
)
596 return &lookup
[i
].fmt
;
601 static const struct pxa_mbus_pixelfmt
*pxa_mbus_get_fmtdesc(
604 return pxa_mbus_find_fmtdesc(code
, mbus_fmt
, ARRAY_SIZE(mbus_fmt
));
608 * struct pxa_camera_format_xlate - match between host and sensor formats
609 * @code: code of a sensor provided format
610 * @host_fmt: host format after host translation from code
612 * Host and sensor translation structure. Used in table of host and sensor
613 * formats matchings in pxa_camera_device. A host can override the generic list
614 * generation by implementing get_formats(), and use it for format checks and
617 struct pxa_camera_format_xlate
{
619 const struct pxa_mbus_pixelfmt
*host_fmt
;
625 enum pxa_camera_active_dma
{
631 /* buffer for one video frame */
633 /* common v4l buffer stuff -- must be first */
634 struct vb2_v4l2_buffer vbuf
;
635 struct list_head queue
;
638 /* our descriptor lists for Y, U and V channels */
639 struct dma_async_tx_descriptor
*descs
[3];
640 dma_cookie_t cookie
[3];
641 struct scatterlist
*sg
[3];
643 size_t plane_sizes
[3];
645 enum pxa_camera_active_dma active_dma
;
648 struct pxa_camera_dev
{
649 struct v4l2_device v4l2_dev
;
650 struct video_device vdev
;
651 struct v4l2_async_notifier notifier
;
652 struct vb2_queue vb2_vq
;
653 struct v4l2_subdev
*sensor
;
654 struct pxa_camera_format_xlate
*user_formats
;
655 const struct pxa_camera_format_xlate
*current_fmt
;
656 struct v4l2_pix_format current_pix
;
659 * PXA27x is only supposed to handle one camera on its Quick Capture
660 * interface. If anyone ever builds hardware to enable more than
661 * one camera, they will have to modify this driver too
669 struct dma_chan
*dma_chans
[3];
671 struct pxacamera_platform_data
*pdata
;
672 struct resource
*res
;
673 unsigned long platform_flags
;
677 u16 width_flags
; /* max 10 bits */
679 struct list_head capture
;
683 unsigned int buf_sequence
;
685 struct pxa_buffer
*active
;
686 struct tasklet_struct task_eof
;
695 static const char *pxa_cam_driver_description
= "PXA_Camera";
698 * Format translation functions
700 static const struct pxa_camera_format_xlate
701 *pxa_mbus_xlate_by_fourcc(struct pxa_camera_format_xlate
*user_formats
,
706 for (i
= 0; user_formats
[i
].code
; i
++)
707 if (user_formats
[i
].host_fmt
->fourcc
== fourcc
)
708 return user_formats
+ i
;
712 static struct pxa_camera_format_xlate
*pxa_mbus_build_fmts_xlate(
713 struct v4l2_device
*v4l2_dev
, struct v4l2_subdev
*subdev
,
714 int (*get_formats
)(struct v4l2_device
*, unsigned int,
715 struct pxa_camera_format_xlate
*xlate
))
717 unsigned int i
, fmts
= 0, raw_fmts
= 0;
719 struct v4l2_subdev_mbus_code_enum code
= {
720 .which
= V4L2_SUBDEV_FORMAT_ACTIVE
,
722 struct pxa_camera_format_xlate
*user_formats
;
724 while (!v4l2_subdev_call(subdev
, pad
, enum_mbus_code
, NULL
, &code
)) {
730 * First pass - only count formats this host-sensor
731 * configuration can provide
733 for (i
= 0; i
< raw_fmts
; i
++) {
734 ret
= get_formats(v4l2_dev
, i
, NULL
);
741 return ERR_PTR(-ENXIO
);
743 user_formats
= kcalloc(fmts
+ 1, sizeof(*user_formats
), GFP_KERNEL
);
745 return ERR_PTR(-ENOMEM
);
747 /* Second pass - actually fill data formats */
749 for (i
= 0; i
< raw_fmts
; i
++) {
750 ret
= get_formats(v4l2_dev
, i
, user_formats
+ fmts
);
755 user_formats
[fmts
].code
= 0;
764 * Videobuf operations
766 static struct pxa_buffer
*vb2_to_pxa_buffer(struct vb2_buffer
*vb
)
768 struct vb2_v4l2_buffer
*vbuf
= to_vb2_v4l2_buffer(vb
);
770 return container_of(vbuf
, struct pxa_buffer
, vbuf
);
773 static struct device
*pcdev_to_dev(struct pxa_camera_dev
*pcdev
)
775 return pcdev
->v4l2_dev
.dev
;
778 static struct pxa_camera_dev
*v4l2_dev_to_pcdev(struct v4l2_device
*v4l2_dev
)
780 return container_of(v4l2_dev
, struct pxa_camera_dev
, v4l2_dev
);
783 static void pxa_camera_dma_irq(struct pxa_camera_dev
*pcdev
,
784 enum pxa_camera_active_dma act_dma
);
786 static void pxa_camera_dma_irq_y(void *data
)
788 struct pxa_camera_dev
*pcdev
= data
;
790 pxa_camera_dma_irq(pcdev
, DMA_Y
);
793 static void pxa_camera_dma_irq_u(void *data
)
795 struct pxa_camera_dev
*pcdev
= data
;
797 pxa_camera_dma_irq(pcdev
, DMA_U
);
800 static void pxa_camera_dma_irq_v(void *data
)
802 struct pxa_camera_dev
*pcdev
= data
;
804 pxa_camera_dma_irq(pcdev
, DMA_V
);
808 * pxa_init_dma_channel - init dma descriptors
809 * @pcdev: pxa camera device
810 * @buf: pxa camera buffer
811 * @channel: dma channel (0 => 'Y', 1 => 'U', 2 => 'V')
812 * @sg: dma scatter list
813 * @sglen: dma scatter list length
815 * Prepares the pxa dma descriptors to transfer one camera channel.
817 * Returns 0 if success or -ENOMEM if no memory is available
819 static int pxa_init_dma_channel(struct pxa_camera_dev
*pcdev
,
820 struct pxa_buffer
*buf
, int channel
,
821 struct scatterlist
*sg
, int sglen
)
823 struct dma_chan
*dma_chan
= pcdev
->dma_chans
[channel
];
824 struct dma_async_tx_descriptor
*tx
;
826 tx
= dmaengine_prep_slave_sg(dma_chan
, sg
, sglen
, DMA_DEV_TO_MEM
,
827 DMA_PREP_INTERRUPT
| DMA_CTRL_REUSE
);
829 dev_err(pcdev_to_dev(pcdev
),
830 "dmaengine_prep_slave_sg failed\n");
834 tx
->callback_param
= pcdev
;
837 tx
->callback
= pxa_camera_dma_irq_y
;
840 tx
->callback
= pxa_camera_dma_irq_u
;
843 tx
->callback
= pxa_camera_dma_irq_v
;
847 buf
->descs
[channel
] = tx
;
850 dev_dbg(pcdev_to_dev(pcdev
),
851 "%s (vb=%p) dma_tx=%p\n",
857 static void pxa_video_buf_set_actdma(struct pxa_camera_dev
*pcdev
,
858 struct pxa_buffer
*buf
)
860 buf
->active_dma
= DMA_Y
;
861 if (buf
->nb_planes
== 3)
862 buf
->active_dma
|= DMA_U
| DMA_V
;
866 * pxa_dma_start_channels - start DMA channel for active buffer
867 * @pcdev: pxa camera device
869 * Initialize DMA channels to the beginning of the active video buffer, and
870 * start these channels.
872 static void pxa_dma_start_channels(struct pxa_camera_dev
*pcdev
)
876 for (i
= 0; i
< pcdev
->channels
; i
++) {
877 dev_dbg(pcdev_to_dev(pcdev
),
878 "%s (channel=%d)\n", __func__
, i
);
879 dma_async_issue_pending(pcdev
->dma_chans
[i
]);
883 static void pxa_dma_stop_channels(struct pxa_camera_dev
*pcdev
)
887 for (i
= 0; i
< pcdev
->channels
; i
++) {
888 dev_dbg(pcdev_to_dev(pcdev
),
889 "%s (channel=%d)\n", __func__
, i
);
890 dmaengine_terminate_all(pcdev
->dma_chans
[i
]);
894 static void pxa_dma_add_tail_buf(struct pxa_camera_dev
*pcdev
,
895 struct pxa_buffer
*buf
)
899 for (i
= 0; i
< pcdev
->channels
; i
++) {
900 buf
->cookie
[i
] = dmaengine_submit(buf
->descs
[i
]);
901 dev_dbg(pcdev_to_dev(pcdev
),
902 "%s (channel=%d) : submit vb=%p cookie=%d\n",
903 __func__
, i
, buf
, buf
->descs
[i
]->cookie
);
908 * pxa_camera_start_capture - start video capturing
909 * @pcdev: camera device
911 * Launch capturing. DMA channels should not be active yet. They should get
912 * activated at the end of frame interrupt, to capture only whole frames, and
913 * never begin the capture of a partial frame.
915 static void pxa_camera_start_capture(struct pxa_camera_dev
*pcdev
)
919 dev_dbg(pcdev_to_dev(pcdev
), "%s\n", __func__
);
920 __raw_writel(__raw_readl(pcdev
->base
+ CISR
), pcdev
->base
+ CISR
);
921 /* Enable End-Of-Frame Interrupt */
922 cicr0
= __raw_readl(pcdev
->base
+ CICR0
) | CICR0_ENB
;
923 cicr0
&= ~CICR0_EOFM
;
924 __raw_writel(cicr0
, pcdev
->base
+ CICR0
);
927 static void pxa_camera_stop_capture(struct pxa_camera_dev
*pcdev
)
931 pxa_dma_stop_channels(pcdev
);
933 cicr0
= __raw_readl(pcdev
->base
+ CICR0
) & ~CICR0_ENB
;
934 __raw_writel(cicr0
, pcdev
->base
+ CICR0
);
936 pcdev
->active
= NULL
;
937 dev_dbg(pcdev_to_dev(pcdev
), "%s\n", __func__
);
940 static void pxa_camera_wakeup(struct pxa_camera_dev
*pcdev
,
941 struct pxa_buffer
*buf
,
942 enum vb2_buffer_state state
)
944 struct vb2_buffer
*vb
= &buf
->vbuf
.vb2_buf
;
945 struct vb2_v4l2_buffer
*vbuf
= to_vb2_v4l2_buffer(vb
);
947 /* _init is used to debug races, see comment in pxa_camera_reqbufs() */
948 list_del_init(&buf
->queue
);
949 vb
->timestamp
= ktime_get_ns();
950 vbuf
->sequence
= pcdev
->buf_sequence
++;
951 vbuf
->field
= V4L2_FIELD_NONE
;
952 vb2_buffer_done(vb
, VB2_BUF_STATE_DONE
);
953 dev_dbg(pcdev_to_dev(pcdev
), "%s dequeued buffer (buf=0x%p)\n",
956 if (list_empty(&pcdev
->capture
)) {
957 pxa_camera_stop_capture(pcdev
);
961 pcdev
->active
= list_entry(pcdev
->capture
.next
,
962 struct pxa_buffer
, queue
);
966 * pxa_camera_check_link_miss - check missed DMA linking
967 * @pcdev: camera device
968 * @last_submitted: an opaque DMA cookie for last submitted
969 * @last_issued: an opaque DMA cookie for last issued
971 * The DMA chaining is done with DMA running. This means a tiny temporal window
972 * remains, where a buffer is queued on the chain, while the chain is already
973 * stopped. This means the tailed buffer would never be transferred by DMA.
974 * This function restarts the capture for this corner case, where :
975 * - DADR() == DADDR_STOP
976 * - a video buffer is queued on the pcdev->capture list
978 * Please check the "DMA hot chaining timeslice issue" in
979 * Documentation/driver-api/media/drivers/pxa_camera.rst
981 * Context: should only be called within the dma irq handler
983 static void pxa_camera_check_link_miss(struct pxa_camera_dev
*pcdev
,
984 dma_cookie_t last_submitted
,
985 dma_cookie_t last_issued
)
987 bool is_dma_stopped
= last_submitted
!= last_issued
;
989 dev_dbg(pcdev_to_dev(pcdev
),
990 "%s : top queued buffer=%p, is_dma_stopped=%d\n",
991 __func__
, pcdev
->active
, is_dma_stopped
);
993 if (pcdev
->active
&& is_dma_stopped
)
994 pxa_camera_start_capture(pcdev
);
997 static void pxa_camera_dma_irq(struct pxa_camera_dev
*pcdev
,
998 enum pxa_camera_active_dma act_dma
)
1000 struct pxa_buffer
*buf
, *last_buf
;
1001 unsigned long flags
;
1002 u32 camera_status
, overrun
;
1004 enum dma_status last_status
;
1005 dma_cookie_t last_issued
;
1007 spin_lock_irqsave(&pcdev
->lock
, flags
);
1009 camera_status
= __raw_readl(pcdev
->base
+ CISR
);
1010 dev_dbg(pcdev_to_dev(pcdev
), "camera dma irq, cisr=0x%x dma=%d\n",
1011 camera_status
, act_dma
);
1012 overrun
= CISR_IFO_0
;
1013 if (pcdev
->channels
== 3)
1014 overrun
|= CISR_IFO_1
| CISR_IFO_2
;
1017 * pcdev->active should not be NULL in DMA irq handler.
1019 * But there is one corner case : if capture was stopped due to an
1020 * overrun of channel 1, and at that same channel 2 was completed.
1022 * When handling the overrun in DMA irq for channel 1, we'll stop the
1023 * capture and restart it (and thus set pcdev->active to NULL). But the
1024 * DMA irq handler will already be pending for channel 2. So on entering
1025 * the DMA irq handler for channel 2 there will be no active buffer, yet
1031 buf
= pcdev
->active
;
1032 WARN_ON(buf
->inwork
|| list_empty(&buf
->queue
));
1035 * It's normal if the last frame creates an overrun, as there
1036 * are no more DMA descriptors to fetch from QCI fifos
1049 last_buf
= list_entry(pcdev
->capture
.prev
,
1050 struct pxa_buffer
, queue
);
1051 last_status
= dma_async_is_tx_complete(pcdev
->dma_chans
[chan
],
1052 last_buf
->cookie
[chan
],
1053 NULL
, &last_issued
);
1054 if (camera_status
& overrun
&&
1055 last_status
!= DMA_COMPLETE
) {
1056 dev_dbg(pcdev_to_dev(pcdev
), "FIFO overrun! CISR: %x\n",
1058 pxa_camera_stop_capture(pcdev
);
1059 list_for_each_entry(buf
, &pcdev
->capture
, queue
)
1060 pxa_dma_add_tail_buf(pcdev
, buf
);
1061 pxa_camera_start_capture(pcdev
);
1064 buf
->active_dma
&= ~act_dma
;
1065 if (!buf
->active_dma
) {
1066 pxa_camera_wakeup(pcdev
, buf
, VB2_BUF_STATE_DONE
);
1067 pxa_camera_check_link_miss(pcdev
, last_buf
->cookie
[chan
],
1072 spin_unlock_irqrestore(&pcdev
->lock
, flags
);
1075 static u32
mclk_get_divisor(struct platform_device
*pdev
,
1076 struct pxa_camera_dev
*pcdev
)
1078 unsigned long mclk
= pcdev
->mclk
;
1080 unsigned long lcdclk
;
1082 lcdclk
= clk_get_rate(pcdev
->clk
);
1083 pcdev
->ciclk
= lcdclk
;
1085 /* mclk <= ciclk / 4 (27.4.2) */
1086 if (mclk
> lcdclk
/ 4) {
1088 dev_warn(&pdev
->dev
,
1089 "Limiting master clock to %lu\n", mclk
);
1092 /* We verify mclk != 0, so if anyone breaks it, here comes their Oops */
1093 div
= (lcdclk
+ 2 * mclk
- 1) / (2 * mclk
) - 1;
1095 /* If we're not supplying MCLK, leave it at 0 */
1096 if (pcdev
->platform_flags
& PXA_CAMERA_MCLK_EN
)
1097 pcdev
->mclk
= lcdclk
/ (2 * (div
+ 1));
1099 dev_dbg(&pdev
->dev
, "LCD clock %luHz, target freq %luHz, divisor %u\n",
1105 static void recalculate_fifo_timeout(struct pxa_camera_dev
*pcdev
,
1108 /* We want a timeout > 1 pixel time, not ">=" */
1109 u32 ciclk_per_pixel
= pcdev
->ciclk
/ pclk
+ 1;
1111 __raw_writel(ciclk_per_pixel
, pcdev
->base
+ CITOR
);
1114 static void pxa_camera_activate(struct pxa_camera_dev
*pcdev
)
1118 /* disable all interrupts */
1119 __raw_writel(0x3ff, pcdev
->base
+ CICR0
);
1121 if (pcdev
->platform_flags
& PXA_CAMERA_PCLK_EN
)
1122 cicr4
|= CICR4_PCLK_EN
;
1123 if (pcdev
->platform_flags
& PXA_CAMERA_MCLK_EN
)
1124 cicr4
|= CICR4_MCLK_EN
;
1125 if (pcdev
->platform_flags
& PXA_CAMERA_PCP
)
1127 if (pcdev
->platform_flags
& PXA_CAMERA_HSP
)
1129 if (pcdev
->platform_flags
& PXA_CAMERA_VSP
)
1132 __raw_writel(pcdev
->mclk_divisor
| cicr4
, pcdev
->base
+ CICR4
);
1134 if (pcdev
->platform_flags
& PXA_CAMERA_MCLK_EN
)
1135 /* Initialise the timeout under the assumption pclk = mclk */
1136 recalculate_fifo_timeout(pcdev
, pcdev
->mclk
);
1138 /* "Safe default" - 13MHz */
1139 recalculate_fifo_timeout(pcdev
, 13000000);
1141 clk_prepare_enable(pcdev
->clk
);
1144 static void pxa_camera_deactivate(struct pxa_camera_dev
*pcdev
)
1146 clk_disable_unprepare(pcdev
->clk
);
1149 static void pxa_camera_eof(struct tasklet_struct
*t
)
1151 struct pxa_camera_dev
*pcdev
= from_tasklet(pcdev
, t
, task_eof
);
1153 struct pxa_buffer
*buf
;
1155 dev_dbg(pcdev_to_dev(pcdev
),
1156 "Camera interrupt status 0x%x\n",
1157 __raw_readl(pcdev
->base
+ CISR
));
1159 /* Reset the FIFOs */
1160 cifr
= __raw_readl(pcdev
->base
+ CIFR
) | CIFR_RESET_F
;
1161 __raw_writel(cifr
, pcdev
->base
+ CIFR
);
1163 pcdev
->active
= list_first_entry(&pcdev
->capture
,
1164 struct pxa_buffer
, queue
);
1165 buf
= pcdev
->active
;
1166 pxa_video_buf_set_actdma(pcdev
, buf
);
1168 pxa_dma_start_channels(pcdev
);
1171 static irqreturn_t
pxa_camera_irq(int irq
, void *data
)
1173 struct pxa_camera_dev
*pcdev
= data
;
1174 unsigned long status
, cicr0
;
1176 status
= __raw_readl(pcdev
->base
+ CISR
);
1177 dev_dbg(pcdev_to_dev(pcdev
),
1178 "Camera interrupt status 0x%lx\n", status
);
1183 __raw_writel(status
, pcdev
->base
+ CISR
);
1185 if (status
& CISR_EOF
) {
1186 cicr0
= __raw_readl(pcdev
->base
+ CICR0
) | CICR0_EOFM
;
1187 __raw_writel(cicr0
, pcdev
->base
+ CICR0
);
1188 tasklet_schedule(&pcdev
->task_eof
);
1194 static void pxa_camera_setup_cicr(struct pxa_camera_dev
*pcdev
,
1195 unsigned long flags
, __u32 pixfmt
)
1197 unsigned long dw
, bpp
;
1198 u32 cicr0
, cicr1
, cicr2
, cicr3
, cicr4
= 0, y_skip_top
;
1199 int ret
= sensor_call(pcdev
, sensor
, g_skip_top_lines
, &y_skip_top
);
1205 * Datawidth is now guaranteed to be equal to one of the three values.
1206 * We fix bit-per-pixel equal to data-width...
1208 switch (pcdev
->current_fmt
->host_fmt
->bits_per_sample
) {
1219 * Actually it can only be 8 now,
1220 * default is just to silence compiler warnings
1227 if (pcdev
->platform_flags
& PXA_CAMERA_PCLK_EN
)
1228 cicr4
|= CICR4_PCLK_EN
;
1229 if (pcdev
->platform_flags
& PXA_CAMERA_MCLK_EN
)
1230 cicr4
|= CICR4_MCLK_EN
;
1231 if (flags
& V4L2_MBUS_PCLK_SAMPLE_FALLING
)
1233 if (flags
& V4L2_MBUS_HSYNC_ACTIVE_LOW
)
1235 if (flags
& V4L2_MBUS_VSYNC_ACTIVE_LOW
)
1238 cicr0
= __raw_readl(pcdev
->base
+ CICR0
);
1239 if (cicr0
& CICR0_ENB
)
1240 __raw_writel(cicr0
& ~CICR0_ENB
, pcdev
->base
+ CICR0
);
1242 cicr1
= CICR1_PPL_VAL(pcdev
->current_pix
.width
- 1) | bpp
| dw
;
1245 case V4L2_PIX_FMT_YUV422P
:
1246 pcdev
->channels
= 3;
1247 cicr1
|= CICR1_YCBCR_F
;
1249 * Normally, pxa bus wants as input UYVY format. We allow all
1250 * reorderings of the YUV422 format, as no processing is done,
1251 * and the YUV stream is just passed through without any
1252 * transformation. Note that UYVY is the only format that
1253 * should be used if pxa framebuffer Overlay2 is used.
1256 case V4L2_PIX_FMT_UYVY
:
1257 case V4L2_PIX_FMT_VYUY
:
1258 case V4L2_PIX_FMT_YUYV
:
1259 case V4L2_PIX_FMT_YVYU
:
1260 cicr1
|= CICR1_COLOR_SP_VAL(2);
1262 case V4L2_PIX_FMT_RGB555
:
1263 cicr1
|= CICR1_RGB_BPP_VAL(1) | CICR1_RGBT_CONV_VAL(2) |
1264 CICR1_TBIT
| CICR1_COLOR_SP_VAL(1);
1266 case V4L2_PIX_FMT_RGB565
:
1267 cicr1
|= CICR1_COLOR_SP_VAL(1) | CICR1_RGB_BPP_VAL(2);
1272 cicr3
= CICR3_LPF_VAL(pcdev
->current_pix
.height
- 1) |
1273 CICR3_BFW_VAL(min((u32
)255, y_skip_top
));
1274 cicr4
|= pcdev
->mclk_divisor
;
1276 __raw_writel(cicr1
, pcdev
->base
+ CICR1
);
1277 __raw_writel(cicr2
, pcdev
->base
+ CICR2
);
1278 __raw_writel(cicr3
, pcdev
->base
+ CICR3
);
1279 __raw_writel(cicr4
, pcdev
->base
+ CICR4
);
1281 /* CIF interrupts are not used, only DMA */
1282 cicr0
= (cicr0
& CICR0_ENB
) | (pcdev
->platform_flags
& PXA_CAMERA_MASTER
?
1283 CICR0_SIM_MP
: (CICR0_SL_CAP_EN
| CICR0_SIM_SP
));
1284 cicr0
|= CICR0_DMAEN
| CICR0_IRQ_MASK
;
1285 __raw_writel(cicr0
, pcdev
->base
+ CICR0
);
1291 static void pxa_buffer_cleanup(struct pxa_buffer
*buf
)
1295 for (i
= 0; i
< 3 && buf
->descs
[i
]; i
++) {
1296 dmaengine_desc_free(buf
->descs
[i
]);
1298 buf
->descs
[i
] = NULL
;
1301 buf
->plane_sizes
[i
] = 0;
1306 static int pxa_buffer_init(struct pxa_camera_dev
*pcdev
,
1307 struct pxa_buffer
*buf
)
1309 struct vb2_buffer
*vb
= &buf
->vbuf
.vb2_buf
;
1310 struct sg_table
*sgt
= vb2_dma_sg_plane_desc(vb
, 0);
1311 int nb_channels
= pcdev
->channels
;
1313 unsigned long size
= vb2_plane_size(vb
, 0);
1315 switch (nb_channels
) {
1317 buf
->plane_sizes
[0] = size
;
1320 buf
->plane_sizes
[0] = size
/ 2;
1321 buf
->plane_sizes
[1] = size
/ 4;
1322 buf
->plane_sizes
[2] = size
/ 4;
1327 buf
->nb_planes
= nb_channels
;
1329 ret
= sg_split(sgt
->sgl
, sgt
->nents
, 0, nb_channels
,
1330 buf
->plane_sizes
, buf
->sg
, buf
->sg_len
, GFP_KERNEL
);
1332 dev_err(pcdev_to_dev(pcdev
),
1333 "sg_split failed: %d\n", ret
);
1336 for (i
= 0; i
< nb_channels
; i
++) {
1337 ret
= pxa_init_dma_channel(pcdev
, buf
, i
,
1338 buf
->sg
[i
], buf
->sg_len
[i
]);
1340 pxa_buffer_cleanup(buf
);
1344 INIT_LIST_HEAD(&buf
->queue
);
1349 static void pxac_vb2_cleanup(struct vb2_buffer
*vb
)
1351 struct pxa_buffer
*buf
= vb2_to_pxa_buffer(vb
);
1352 struct pxa_camera_dev
*pcdev
= vb2_get_drv_priv(vb
->vb2_queue
);
1354 dev_dbg(pcdev_to_dev(pcdev
),
1355 "%s(vb=%p)\n", __func__
, vb
);
1356 pxa_buffer_cleanup(buf
);
1359 static void pxac_vb2_queue(struct vb2_buffer
*vb
)
1361 struct pxa_buffer
*buf
= vb2_to_pxa_buffer(vb
);
1362 struct pxa_camera_dev
*pcdev
= vb2_get_drv_priv(vb
->vb2_queue
);
1364 dev_dbg(pcdev_to_dev(pcdev
),
1365 "%s(vb=%p) nb_channels=%d size=%lu active=%p\n",
1366 __func__
, vb
, pcdev
->channels
, vb2_get_plane_payload(vb
, 0),
1369 list_add_tail(&buf
->queue
, &pcdev
->capture
);
1371 pxa_dma_add_tail_buf(pcdev
, buf
);
1375 * Please check the DMA prepared buffer structure in :
1376 * Documentation/driver-api/media/drivers/pxa_camera.rst
1377 * Please check also in pxa_camera_check_link_miss() to understand why DMA chain
1378 * modification while DMA chain is running will work anyway.
1380 static int pxac_vb2_prepare(struct vb2_buffer
*vb
)
1382 struct pxa_camera_dev
*pcdev
= vb2_get_drv_priv(vb
->vb2_queue
);
1383 struct pxa_buffer
*buf
= vb2_to_pxa_buffer(vb
);
1389 switch (pcdev
->channels
) {
1392 vb2_set_plane_payload(vb
, 0, pcdev
->current_pix
.sizeimage
);
1398 dev_dbg(pcdev_to_dev(pcdev
),
1399 "%s (vb=%p) nb_channels=%d size=%lu\n",
1400 __func__
, vb
, pcdev
->channels
, vb2_get_plane_payload(vb
, 0));
1402 WARN_ON(!pcdev
->current_fmt
);
1406 * This can be useful if you want to see if we actually fill
1407 * the buffer with something
1409 for (i
= 0; i
< vb
->num_planes
; i
++)
1410 memset((void *)vb2_plane_vaddr(vb
, i
),
1411 0xaa, vb2_get_plane_payload(vb
, i
));
1415 * I think, in buf_prepare you only have to protect global data,
1416 * the actual buffer is yours
1419 pxa_video_buf_set_actdma(pcdev
, buf
);
1424 static int pxac_vb2_init(struct vb2_buffer
*vb
)
1426 struct pxa_camera_dev
*pcdev
= vb2_get_drv_priv(vb
->vb2_queue
);
1427 struct pxa_buffer
*buf
= vb2_to_pxa_buffer(vb
);
1429 dev_dbg(pcdev_to_dev(pcdev
),
1430 "%s(nb_channels=%d)\n",
1431 __func__
, pcdev
->channels
);
1433 return pxa_buffer_init(pcdev
, buf
);
1436 static int pxac_vb2_queue_setup(struct vb2_queue
*vq
,
1437 unsigned int *nbufs
,
1438 unsigned int *num_planes
, unsigned int sizes
[],
1439 struct device
*alloc_devs
[])
1441 struct pxa_camera_dev
*pcdev
= vb2_get_drv_priv(vq
);
1442 int size
= pcdev
->current_pix
.sizeimage
;
1444 dev_dbg(pcdev_to_dev(pcdev
),
1445 "%s(vq=%p nbufs=%d num_planes=%d size=%d)\n",
1446 __func__
, vq
, *nbufs
, *num_planes
, size
);
1448 * Called from VIDIOC_REQBUFS or in compatibility mode For YUV422P
1449 * format, even if there are 3 planes Y, U and V, we reply there is only
1450 * one plane, containing Y, U and V data, one after the other.
1453 return sizes
[0] < size
? -EINVAL
: 0;
1456 switch (pcdev
->channels
) {
1471 static int pxac_vb2_start_streaming(struct vb2_queue
*vq
, unsigned int count
)
1473 struct pxa_camera_dev
*pcdev
= vb2_get_drv_priv(vq
);
1475 dev_dbg(pcdev_to_dev(pcdev
), "%s(count=%d) active=%p\n",
1476 __func__
, count
, pcdev
->active
);
1478 pcdev
->buf_sequence
= 0;
1480 pxa_camera_start_capture(pcdev
);
1485 static void pxac_vb2_stop_streaming(struct vb2_queue
*vq
)
1487 struct pxa_camera_dev
*pcdev
= vb2_get_drv_priv(vq
);
1488 struct pxa_buffer
*buf
, *tmp
;
1490 dev_dbg(pcdev_to_dev(pcdev
), "%s active=%p\n",
1491 __func__
, pcdev
->active
);
1492 pxa_camera_stop_capture(pcdev
);
1494 list_for_each_entry_safe(buf
, tmp
, &pcdev
->capture
, queue
)
1495 pxa_camera_wakeup(pcdev
, buf
, VB2_BUF_STATE_ERROR
);
1498 static const struct vb2_ops pxac_vb2_ops
= {
1499 .queue_setup
= pxac_vb2_queue_setup
,
1500 .buf_init
= pxac_vb2_init
,
1501 .buf_prepare
= pxac_vb2_prepare
,
1502 .buf_queue
= pxac_vb2_queue
,
1503 .buf_cleanup
= pxac_vb2_cleanup
,
1504 .start_streaming
= pxac_vb2_start_streaming
,
1505 .stop_streaming
= pxac_vb2_stop_streaming
,
1506 .wait_prepare
= vb2_ops_wait_prepare
,
1507 .wait_finish
= vb2_ops_wait_finish
,
1510 static int pxa_camera_init_videobuf2(struct pxa_camera_dev
*pcdev
)
1513 struct vb2_queue
*vq
= &pcdev
->vb2_vq
;
1515 memset(vq
, 0, sizeof(*vq
));
1516 vq
->type
= V4L2_BUF_TYPE_VIDEO_CAPTURE
;
1517 vq
->io_modes
= VB2_MMAP
| VB2_USERPTR
| VB2_DMABUF
;
1518 vq
->drv_priv
= pcdev
;
1519 vq
->timestamp_flags
= V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC
;
1520 vq
->buf_struct_size
= sizeof(struct pxa_buffer
);
1521 vq
->dev
= pcdev
->v4l2_dev
.dev
;
1523 vq
->ops
= &pxac_vb2_ops
;
1524 vq
->mem_ops
= &vb2_dma_sg_memops
;
1525 vq
->lock
= &pcdev
->mlock
;
1527 ret
= vb2_queue_init(vq
);
1528 dev_dbg(pcdev_to_dev(pcdev
),
1529 "vb2_queue_init(vq=%p): %d\n", vq
, ret
);
1535 * Video ioctls section
1537 static int pxa_camera_set_bus_param(struct pxa_camera_dev
*pcdev
)
1539 unsigned int bus_width
= pcdev
->current_fmt
->host_fmt
->bits_per_sample
;
1540 struct v4l2_mbus_config cfg
= {.type
= V4L2_MBUS_PARALLEL
,};
1541 u32 pixfmt
= pcdev
->current_fmt
->host_fmt
->fourcc
;
1545 if (!((1 << (bus_width
- 1)) & pcdev
->width_flags
)) {
1546 dev_err(pcdev_to_dev(pcdev
), "Unsupported bus width %u",
1551 pcdev
->channels
= 1;
1553 /* Make choices, based on platform preferences */
1555 if (pcdev
->platform_flags
& PXA_CAMERA_MASTER
)
1556 mbus_config
|= V4L2_MBUS_MASTER
;
1558 mbus_config
|= V4L2_MBUS_SLAVE
;
1560 if (pcdev
->platform_flags
& PXA_CAMERA_HSP
)
1561 mbus_config
|= V4L2_MBUS_HSYNC_ACTIVE_HIGH
;
1563 mbus_config
|= V4L2_MBUS_HSYNC_ACTIVE_LOW
;
1565 if (pcdev
->platform_flags
& PXA_CAMERA_VSP
)
1566 mbus_config
|= V4L2_MBUS_VSYNC_ACTIVE_HIGH
;
1568 mbus_config
|= V4L2_MBUS_VSYNC_ACTIVE_LOW
;
1570 if (pcdev
->platform_flags
& PXA_CAMERA_PCP
)
1571 mbus_config
|= V4L2_MBUS_PCLK_SAMPLE_RISING
;
1573 mbus_config
|= V4L2_MBUS_PCLK_SAMPLE_FALLING
;
1574 mbus_config
|= V4L2_MBUS_DATA_ACTIVE_HIGH
;
1576 ret
= sensor_call(pcdev
, pad
, get_mbus_config
, 0, &cfg
);
1577 if (ret
< 0 && ret
!= -ENOIOCTLCMD
) {
1578 dev_err(pcdev_to_dev(pcdev
),
1579 "Failed to call get_mbus_config: %d\n", ret
);
1584 * If the media bus configuration of the sensor differs, make sure it
1585 * is supported by the platform.
1587 * PXA does not support V4L2_MBUS_DATA_ACTIVE_LOW and the bus mastering
1588 * roles should match.
1590 if (cfg
.bus
.parallel
.flags
!= mbus_config
) {
1591 unsigned int pxa_mbus_role
= mbus_config
& (V4L2_MBUS_MASTER
|
1593 unsigned int flags
= cfg
.bus
.parallel
.flags
;
1595 if (pxa_mbus_role
!= (flags
& (V4L2_MBUS_MASTER
|
1596 V4L2_MBUS_SLAVE
))) {
1597 dev_err(pcdev_to_dev(pcdev
),
1598 "Unsupported mbus configuration: bus mastering\n");
1602 if (flags
& V4L2_MBUS_DATA_ACTIVE_LOW
) {
1603 dev_err(pcdev_to_dev(pcdev
),
1604 "Unsupported mbus configuration: DATA_ACTIVE_LOW\n");
1609 pxa_camera_setup_cicr(pcdev
, cfg
.bus
.parallel
.flags
, pixfmt
);
1614 static const struct pxa_mbus_pixelfmt pxa_camera_formats
[] = {
1616 .fourcc
= V4L2_PIX_FMT_YUV422P
,
1617 .name
= "Planar YUV422 16 bit",
1618 .bits_per_sample
= 8,
1619 .packing
= PXA_MBUS_PACKING_2X8_PADHI
,
1620 .order
= PXA_MBUS_ORDER_LE
,
1621 .layout
= PXA_MBUS_LAYOUT_PLANAR_2Y_U_V
,
1625 /* This will be corrected as we get more formats */
1626 static bool pxa_camera_packing_supported(const struct pxa_mbus_pixelfmt
*fmt
)
1628 return fmt
->packing
== PXA_MBUS_PACKING_NONE
||
1629 (fmt
->bits_per_sample
== 8 &&
1630 fmt
->packing
== PXA_MBUS_PACKING_2X8_PADHI
) ||
1631 (fmt
->bits_per_sample
> 8 &&
1632 fmt
->packing
== PXA_MBUS_PACKING_EXTEND16
);
1635 static int pxa_camera_get_formats(struct v4l2_device
*v4l2_dev
,
1637 struct pxa_camera_format_xlate
*xlate
)
1639 struct pxa_camera_dev
*pcdev
= v4l2_dev_to_pcdev(v4l2_dev
);
1640 int formats
= 0, ret
;
1641 struct v4l2_subdev_mbus_code_enum code
= {
1642 .which
= V4L2_SUBDEV_FORMAT_ACTIVE
,
1645 const struct pxa_mbus_pixelfmt
*fmt
;
1647 ret
= sensor_call(pcdev
, pad
, enum_mbus_code
, NULL
, &code
);
1649 /* No more formats */
1652 fmt
= pxa_mbus_get_fmtdesc(code
.code
);
1654 dev_err(pcdev_to_dev(pcdev
),
1655 "Invalid format code #%u: %d\n", idx
, code
.code
);
1659 switch (code
.code
) {
1660 case MEDIA_BUS_FMT_UYVY8_2X8
:
1663 xlate
->host_fmt
= &pxa_camera_formats
[0];
1664 xlate
->code
= code
.code
;
1666 dev_dbg(pcdev_to_dev(pcdev
),
1667 "Providing format %s using code %d\n",
1668 pxa_camera_formats
[0].name
, code
.code
);
1671 case MEDIA_BUS_FMT_VYUY8_2X8
:
1672 case MEDIA_BUS_FMT_YUYV8_2X8
:
1673 case MEDIA_BUS_FMT_YVYU8_2X8
:
1674 case MEDIA_BUS_FMT_RGB565_2X8_LE
:
1675 case MEDIA_BUS_FMT_RGB555_2X8_PADHI_LE
:
1677 dev_dbg(pcdev_to_dev(pcdev
),
1678 "Providing format %s packed\n",
1682 if (!pxa_camera_packing_supported(fmt
))
1685 dev_dbg(pcdev_to_dev(pcdev
),
1686 "Providing format %s in pass-through mode\n",
1691 /* Generic pass-through */
1694 xlate
->host_fmt
= fmt
;
1695 xlate
->code
= code
.code
;
1702 static int pxa_camera_build_formats(struct pxa_camera_dev
*pcdev
)
1704 struct pxa_camera_format_xlate
*xlate
;
1706 xlate
= pxa_mbus_build_fmts_xlate(&pcdev
->v4l2_dev
, pcdev
->sensor
,
1707 pxa_camera_get_formats
);
1709 return PTR_ERR(xlate
);
1711 pcdev
->user_formats
= xlate
;
1715 static void pxa_camera_destroy_formats(struct pxa_camera_dev
*pcdev
)
1717 kfree(pcdev
->user_formats
);
1720 static int pxa_camera_check_frame(u32 width
, u32 height
)
1722 /* limit to pxa hardware capabilities */
1723 return height
< 32 || height
> 2048 || width
< 48 || width
> 2048 ||
1727 #ifdef CONFIG_VIDEO_ADV_DEBUG
1728 static int pxac_vidioc_g_register(struct file
*file
, void *priv
,
1729 struct v4l2_dbg_register
*reg
)
1731 struct pxa_camera_dev
*pcdev
= video_drvdata(file
);
1733 if (reg
->reg
> CIBR2
)
1736 reg
->val
= __raw_readl(pcdev
->base
+ reg
->reg
);
1737 reg
->size
= sizeof(__u32
);
1741 static int pxac_vidioc_s_register(struct file
*file
, void *priv
,
1742 const struct v4l2_dbg_register
*reg
)
1744 struct pxa_camera_dev
*pcdev
= video_drvdata(file
);
1746 if (reg
->reg
> CIBR2
)
1748 if (reg
->size
!= sizeof(__u32
))
1750 __raw_writel(reg
->val
, pcdev
->base
+ reg
->reg
);
1755 static int pxac_vidioc_enum_fmt_vid_cap(struct file
*filp
, void *priv
,
1756 struct v4l2_fmtdesc
*f
)
1758 struct pxa_camera_dev
*pcdev
= video_drvdata(filp
);
1759 const struct pxa_mbus_pixelfmt
*format
;
1762 for (idx
= 0; pcdev
->user_formats
[idx
].code
; idx
++);
1763 if (f
->index
>= idx
)
1766 format
= pcdev
->user_formats
[f
->index
].host_fmt
;
1767 f
->pixelformat
= format
->fourcc
;
1771 static int pxac_vidioc_g_fmt_vid_cap(struct file
*filp
, void *priv
,
1772 struct v4l2_format
*f
)
1774 struct pxa_camera_dev
*pcdev
= video_drvdata(filp
);
1775 struct v4l2_pix_format
*pix
= &f
->fmt
.pix
;
1777 pix
->width
= pcdev
->current_pix
.width
;
1778 pix
->height
= pcdev
->current_pix
.height
;
1779 pix
->bytesperline
= pcdev
->current_pix
.bytesperline
;
1780 pix
->sizeimage
= pcdev
->current_pix
.sizeimage
;
1781 pix
->field
= pcdev
->current_pix
.field
;
1782 pix
->pixelformat
= pcdev
->current_fmt
->host_fmt
->fourcc
;
1783 pix
->colorspace
= pcdev
->current_pix
.colorspace
;
1784 dev_dbg(pcdev_to_dev(pcdev
), "current_fmt->fourcc: 0x%08x\n",
1785 pcdev
->current_fmt
->host_fmt
->fourcc
);
1789 static int pxac_vidioc_try_fmt_vid_cap(struct file
*filp
, void *priv
,
1790 struct v4l2_format
*f
)
1792 struct pxa_camera_dev
*pcdev
= video_drvdata(filp
);
1793 const struct pxa_camera_format_xlate
*xlate
;
1794 struct v4l2_pix_format
*pix
= &f
->fmt
.pix
;
1795 struct v4l2_subdev_pad_config pad_cfg
;
1796 struct v4l2_subdev_state pad_state
= {
1799 struct v4l2_subdev_format format
= {
1800 .which
= V4L2_SUBDEV_FORMAT_TRY
,
1802 struct v4l2_mbus_framefmt
*mf
= &format
.format
;
1803 __u32 pixfmt
= pix
->pixelformat
;
1806 xlate
= pxa_mbus_xlate_by_fourcc(pcdev
->user_formats
, pixfmt
);
1808 dev_warn(pcdev_to_dev(pcdev
), "Format %x not found\n", pixfmt
);
1813 * Limit to pxa hardware capabilities. YUV422P planar format requires
1814 * images size to be a multiple of 16 bytes. If not, zeros will be
1815 * inserted between Y and U planes, and U and V planes, which violates
1816 * the YUV422P standard.
1818 v4l_bound_align_image(&pix
->width
, 48, 2048, 1,
1819 &pix
->height
, 32, 2048, 0,
1820 pixfmt
== V4L2_PIX_FMT_YUV422P
? 4 : 0);
1822 v4l2_fill_mbus_format(mf
, pix
, xlate
->code
);
1823 ret
= sensor_call(pcdev
, pad
, set_fmt
, &pad_state
, &format
);
1827 v4l2_fill_pix_format(pix
, mf
);
1829 /* Only progressive video supported so far */
1830 switch (mf
->field
) {
1831 case V4L2_FIELD_ANY
:
1832 case V4L2_FIELD_NONE
:
1833 pix
->field
= V4L2_FIELD_NONE
;
1836 /* TODO: support interlaced at least in pass-through mode */
1837 dev_err(pcdev_to_dev(pcdev
), "Field type %d unsupported.\n",
1842 ret
= pxa_mbus_bytes_per_line(pix
->width
, xlate
->host_fmt
);
1846 pix
->bytesperline
= ret
;
1847 ret
= pxa_mbus_image_size(xlate
->host_fmt
, pix
->bytesperline
,
1852 pix
->sizeimage
= ret
;
1856 static int pxac_vidioc_s_fmt_vid_cap(struct file
*filp
, void *priv
,
1857 struct v4l2_format
*f
)
1859 struct pxa_camera_dev
*pcdev
= video_drvdata(filp
);
1860 const struct pxa_camera_format_xlate
*xlate
;
1861 struct v4l2_pix_format
*pix
= &f
->fmt
.pix
;
1862 struct v4l2_subdev_format format
= {
1863 .which
= V4L2_SUBDEV_FORMAT_ACTIVE
,
1865 unsigned long flags
;
1868 dev_dbg(pcdev_to_dev(pcdev
),
1869 "s_fmt_vid_cap(pix=%dx%d:%x)\n",
1870 pix
->width
, pix
->height
, pix
->pixelformat
);
1872 spin_lock_irqsave(&pcdev
->lock
, flags
);
1873 is_busy
= pcdev
->active
|| vb2_is_busy(&pcdev
->vb2_vq
);
1874 spin_unlock_irqrestore(&pcdev
->lock
, flags
);
1879 ret
= pxac_vidioc_try_fmt_vid_cap(filp
, priv
, f
);
1883 xlate
= pxa_mbus_xlate_by_fourcc(pcdev
->user_formats
,
1885 v4l2_fill_mbus_format(&format
.format
, pix
, xlate
->code
);
1886 ret
= sensor_call(pcdev
, pad
, set_fmt
, NULL
, &format
);
1888 dev_warn(pcdev_to_dev(pcdev
),
1889 "Failed to configure for format %x\n",
1891 } else if (pxa_camera_check_frame(pix
->width
, pix
->height
)) {
1892 dev_warn(pcdev_to_dev(pcdev
),
1893 "Camera driver produced an unsupported frame %dx%d\n",
1894 pix
->width
, pix
->height
);
1898 pcdev
->current_fmt
= xlate
;
1899 pcdev
->current_pix
= *pix
;
1901 ret
= pxa_camera_set_bus_param(pcdev
);
1905 static int pxac_vidioc_querycap(struct file
*file
, void *priv
,
1906 struct v4l2_capability
*cap
)
1908 strscpy(cap
->bus_info
, "platform:pxa-camera", sizeof(cap
->bus_info
));
1909 strscpy(cap
->driver
, PXA_CAM_DRV_NAME
, sizeof(cap
->driver
));
1910 strscpy(cap
->card
, pxa_cam_driver_description
, sizeof(cap
->card
));
1914 static int pxac_vidioc_enum_input(struct file
*file
, void *priv
,
1915 struct v4l2_input
*i
)
1920 i
->type
= V4L2_INPUT_TYPE_CAMERA
;
1921 strscpy(i
->name
, "Camera", sizeof(i
->name
));
1926 static int pxac_vidioc_g_input(struct file
*file
, void *priv
, unsigned int *i
)
1933 static int pxac_vidioc_s_input(struct file
*file
, void *priv
, unsigned int i
)
1941 static int pxac_sensor_set_power(struct pxa_camera_dev
*pcdev
, int on
)
1945 ret
= sensor_call(pcdev
, core
, s_power
, on
);
1946 if (ret
== -ENOIOCTLCMD
)
1949 dev_warn(pcdev_to_dev(pcdev
),
1950 "Failed to put subdevice in %s mode: %d\n",
1951 on
? "normal operation" : "power saving", ret
);
1957 static int pxac_fops_camera_open(struct file
*filp
)
1959 struct pxa_camera_dev
*pcdev
= video_drvdata(filp
);
1962 mutex_lock(&pcdev
->mlock
);
1963 ret
= v4l2_fh_open(filp
);
1967 if (!v4l2_fh_is_singular_file(filp
))
1970 ret
= pxac_sensor_set_power(pcdev
, 1);
1972 v4l2_fh_release(filp
);
1974 mutex_unlock(&pcdev
->mlock
);
1978 static int pxac_fops_camera_release(struct file
*filp
)
1980 struct pxa_camera_dev
*pcdev
= video_drvdata(filp
);
1984 mutex_lock(&pcdev
->mlock
);
1986 fh_singular
= v4l2_fh_is_singular_file(filp
);
1988 ret
= _vb2_fop_release(filp
, NULL
);
1991 ret
= pxac_sensor_set_power(pcdev
, 0);
1993 mutex_unlock(&pcdev
->mlock
);
1998 static const struct v4l2_file_operations pxa_camera_fops
= {
1999 .owner
= THIS_MODULE
,
2000 .open
= pxac_fops_camera_open
,
2001 .release
= pxac_fops_camera_release
,
2002 .read
= vb2_fop_read
,
2003 .poll
= vb2_fop_poll
,
2004 .mmap
= vb2_fop_mmap
,
2005 .unlocked_ioctl
= video_ioctl2
,
2008 static const struct v4l2_ioctl_ops pxa_camera_ioctl_ops
= {
2009 .vidioc_querycap
= pxac_vidioc_querycap
,
2011 .vidioc_enum_input
= pxac_vidioc_enum_input
,
2012 .vidioc_g_input
= pxac_vidioc_g_input
,
2013 .vidioc_s_input
= pxac_vidioc_s_input
,
2015 .vidioc_enum_fmt_vid_cap
= pxac_vidioc_enum_fmt_vid_cap
,
2016 .vidioc_g_fmt_vid_cap
= pxac_vidioc_g_fmt_vid_cap
,
2017 .vidioc_s_fmt_vid_cap
= pxac_vidioc_s_fmt_vid_cap
,
2018 .vidioc_try_fmt_vid_cap
= pxac_vidioc_try_fmt_vid_cap
,
2020 .vidioc_reqbufs
= vb2_ioctl_reqbufs
,
2021 .vidioc_create_bufs
= vb2_ioctl_create_bufs
,
2022 .vidioc_querybuf
= vb2_ioctl_querybuf
,
2023 .vidioc_qbuf
= vb2_ioctl_qbuf
,
2024 .vidioc_dqbuf
= vb2_ioctl_dqbuf
,
2025 .vidioc_expbuf
= vb2_ioctl_expbuf
,
2026 .vidioc_streamon
= vb2_ioctl_streamon
,
2027 .vidioc_streamoff
= vb2_ioctl_streamoff
,
2028 #ifdef CONFIG_VIDEO_ADV_DEBUG
2029 .vidioc_g_register
= pxac_vidioc_g_register
,
2030 .vidioc_s_register
= pxac_vidioc_s_register
,
2032 .vidioc_subscribe_event
= v4l2_ctrl_subscribe_event
,
2033 .vidioc_unsubscribe_event
= v4l2_event_unsubscribe
,
2036 static const struct video_device pxa_camera_videodev_template
= {
2037 .name
= "pxa-camera",
2039 .fops
= &pxa_camera_fops
,
2040 .ioctl_ops
= &pxa_camera_ioctl_ops
,
2041 .release
= video_device_release_empty
,
2042 .device_caps
= V4L2_CAP_VIDEO_CAPTURE
| V4L2_CAP_STREAMING
,
2045 static int pxa_camera_sensor_bound(struct v4l2_async_notifier
*notifier
,
2046 struct v4l2_subdev
*subdev
,
2047 struct v4l2_async_connection
*asd
)
2050 struct v4l2_device
*v4l2_dev
= notifier
->v4l2_dev
;
2051 struct pxa_camera_dev
*pcdev
= v4l2_dev_to_pcdev(v4l2_dev
);
2052 struct video_device
*vdev
= &pcdev
->vdev
;
2053 struct v4l2_pix_format
*pix
= &pcdev
->current_pix
;
2054 struct v4l2_subdev_format format
= {
2055 .which
= V4L2_SUBDEV_FORMAT_ACTIVE
,
2057 struct v4l2_mbus_framefmt
*mf
= &format
.format
;
2059 dev_info(pcdev_to_dev(pcdev
), "%s(): trying to bind a device\n",
2061 mutex_lock(&pcdev
->mlock
);
2062 *vdev
= pxa_camera_videodev_template
;
2063 vdev
->v4l2_dev
= v4l2_dev
;
2064 vdev
->lock
= &pcdev
->mlock
;
2065 pcdev
->sensor
= subdev
;
2066 pcdev
->vdev
.queue
= &pcdev
->vb2_vq
;
2067 pcdev
->vdev
.v4l2_dev
= &pcdev
->v4l2_dev
;
2068 pcdev
->vdev
.ctrl_handler
= subdev
->ctrl_handler
;
2069 video_set_drvdata(&pcdev
->vdev
, pcdev
);
2071 err
= pxa_camera_build_formats(pcdev
);
2073 dev_err(pcdev_to_dev(pcdev
), "building formats failed: %d\n",
2078 pcdev
->current_fmt
= pcdev
->user_formats
;
2079 pix
->field
= V4L2_FIELD_NONE
;
2080 pix
->width
= DEFAULT_WIDTH
;
2081 pix
->height
= DEFAULT_HEIGHT
;
2083 pxa_mbus_bytes_per_line(pix
->width
,
2084 pcdev
->current_fmt
->host_fmt
);
2086 pxa_mbus_image_size(pcdev
->current_fmt
->host_fmt
,
2087 pix
->bytesperline
, pix
->height
);
2088 pix
->pixelformat
= pcdev
->current_fmt
->host_fmt
->fourcc
;
2089 v4l2_fill_mbus_format(mf
, pix
, pcdev
->current_fmt
->code
);
2091 err
= pxac_sensor_set_power(pcdev
, 1);
2095 err
= sensor_call(pcdev
, pad
, set_fmt
, NULL
, &format
);
2097 goto out_sensor_poweroff
;
2099 v4l2_fill_pix_format(pix
, mf
);
2100 pr_info("%s(): colorspace=0x%x pixfmt=0x%x\n",
2101 __func__
, pix
->colorspace
, pix
->pixelformat
);
2103 err
= pxa_camera_init_videobuf2(pcdev
);
2105 goto out_sensor_poweroff
;
2107 err
= video_register_device(&pcdev
->vdev
, VFL_TYPE_VIDEO
, -1);
2109 v4l2_err(v4l2_dev
, "register video device failed: %d\n", err
);
2110 pcdev
->sensor
= NULL
;
2112 dev_info(pcdev_to_dev(pcdev
),
2113 "PXA Camera driver attached to camera %s\n",
2117 out_sensor_poweroff
:
2118 err
= pxac_sensor_set_power(pcdev
, 0);
2120 mutex_unlock(&pcdev
->mlock
);
2124 static void pxa_camera_sensor_unbind(struct v4l2_async_notifier
*notifier
,
2125 struct v4l2_subdev
*subdev
,
2126 struct v4l2_async_connection
*asd
)
2128 struct pxa_camera_dev
*pcdev
= v4l2_dev_to_pcdev(notifier
->v4l2_dev
);
2130 mutex_lock(&pcdev
->mlock
);
2131 dev_info(pcdev_to_dev(pcdev
),
2132 "PXA Camera driver detached from camera %s\n",
2135 /* disable capture, disable interrupts */
2136 __raw_writel(0x3ff, pcdev
->base
+ CICR0
);
2138 /* Stop DMA engine */
2139 pxa_dma_stop_channels(pcdev
);
2141 pxa_camera_destroy_formats(pcdev
);
2143 video_unregister_device(&pcdev
->vdev
);
2144 pcdev
->sensor
= NULL
;
2146 mutex_unlock(&pcdev
->mlock
);
2149 static const struct v4l2_async_notifier_operations pxa_camera_sensor_ops
= {
2150 .bound
= pxa_camera_sensor_bound
,
2151 .unbind
= pxa_camera_sensor_unbind
,
2155 * Driver probe, remove, suspend and resume operations
2157 static int pxa_camera_suspend(struct device
*dev
)
2159 struct pxa_camera_dev
*pcdev
= dev_get_drvdata(dev
);
2162 pcdev
->save_cicr
[i
++] = __raw_readl(pcdev
->base
+ CICR0
);
2163 pcdev
->save_cicr
[i
++] = __raw_readl(pcdev
->base
+ CICR1
);
2164 pcdev
->save_cicr
[i
++] = __raw_readl(pcdev
->base
+ CICR2
);
2165 pcdev
->save_cicr
[i
++] = __raw_readl(pcdev
->base
+ CICR3
);
2166 pcdev
->save_cicr
[i
++] = __raw_readl(pcdev
->base
+ CICR4
);
2169 ret
= pxac_sensor_set_power(pcdev
, 0);
2174 static int pxa_camera_resume(struct device
*dev
)
2176 struct pxa_camera_dev
*pcdev
= dev_get_drvdata(dev
);
2179 __raw_writel(pcdev
->save_cicr
[i
++] & ~CICR0_ENB
, pcdev
->base
+ CICR0
);
2180 __raw_writel(pcdev
->save_cicr
[i
++], pcdev
->base
+ CICR1
);
2181 __raw_writel(pcdev
->save_cicr
[i
++], pcdev
->base
+ CICR2
);
2182 __raw_writel(pcdev
->save_cicr
[i
++], pcdev
->base
+ CICR3
);
2183 __raw_writel(pcdev
->save_cicr
[i
++], pcdev
->base
+ CICR4
);
2185 if (pcdev
->sensor
) {
2186 ret
= pxac_sensor_set_power(pcdev
, 1);
2189 /* Restart frame capture if active buffer exists */
2190 if (!ret
&& pcdev
->active
)
2191 pxa_camera_start_capture(pcdev
);
2196 static int pxa_camera_pdata_from_dt(struct device
*dev
,
2197 struct pxa_camera_dev
*pcdev
)
2200 struct v4l2_async_connection
*asd
;
2201 struct device_node
*np
= dev
->of_node
;
2202 struct v4l2_fwnode_endpoint ep
= { .bus_type
= 0 };
2203 int err
= of_property_read_u32(np
, "clock-frequency",
2206 pcdev
->platform_flags
|= PXA_CAMERA_MCLK_EN
;
2207 pcdev
->mclk
= mclk_rate
;
2210 np
= of_graph_get_next_endpoint(np
, NULL
);
2212 dev_err(dev
, "could not find endpoint\n");
2216 err
= v4l2_fwnode_endpoint_parse(of_fwnode_handle(np
), &ep
);
2218 dev_err(dev
, "could not parse endpoint\n");
2222 switch (ep
.bus
.parallel
.bus_width
) {
2224 pcdev
->platform_flags
|= PXA_CAMERA_DATAWIDTH_4
;
2227 pcdev
->platform_flags
|= PXA_CAMERA_DATAWIDTH_5
;
2230 pcdev
->platform_flags
|= PXA_CAMERA_DATAWIDTH_8
;
2233 pcdev
->platform_flags
|= PXA_CAMERA_DATAWIDTH_9
;
2236 pcdev
->platform_flags
|= PXA_CAMERA_DATAWIDTH_10
;
2242 if (ep
.bus
.parallel
.flags
& V4L2_MBUS_MASTER
)
2243 pcdev
->platform_flags
|= PXA_CAMERA_MASTER
;
2244 if (ep
.bus
.parallel
.flags
& V4L2_MBUS_HSYNC_ACTIVE_HIGH
)
2245 pcdev
->platform_flags
|= PXA_CAMERA_HSP
;
2246 if (ep
.bus
.parallel
.flags
& V4L2_MBUS_VSYNC_ACTIVE_HIGH
)
2247 pcdev
->platform_flags
|= PXA_CAMERA_VSP
;
2248 if (ep
.bus
.parallel
.flags
& V4L2_MBUS_PCLK_SAMPLE_RISING
)
2249 pcdev
->platform_flags
|= PXA_CAMERA_PCLK_EN
| PXA_CAMERA_PCP
;
2250 if (ep
.bus
.parallel
.flags
& V4L2_MBUS_PCLK_SAMPLE_FALLING
)
2251 pcdev
->platform_flags
|= PXA_CAMERA_PCLK_EN
;
2253 asd
= v4l2_async_nf_add_fwnode_remote(&pcdev
->notifier
,
2254 of_fwnode_handle(np
),
2255 struct v4l2_async_connection
);
2264 static int pxa_camera_probe(struct platform_device
*pdev
)
2266 struct pxa_camera_dev
*pcdev
;
2267 struct resource
*res
;
2269 struct dma_slave_config config
= {
2270 .src_addr_width
= 0,
2272 .direction
= DMA_DEV_TO_MEM
,
2277 irq
= platform_get_irq(pdev
, 0);
2281 pcdev
= devm_kzalloc(&pdev
->dev
, sizeof(*pcdev
), GFP_KERNEL
);
2283 dev_err(&pdev
->dev
, "Could not allocate pcdev\n");
2287 pcdev
->clk
= devm_clk_get(&pdev
->dev
, NULL
);
2288 if (IS_ERR(pcdev
->clk
))
2289 return PTR_ERR(pcdev
->clk
);
2292 * Request the regions.
2294 base
= devm_platform_get_and_ioremap_resource(pdev
, 0, &res
);
2296 return PTR_ERR(base
);
2301 err
= v4l2_device_register(&pdev
->dev
, &pcdev
->v4l2_dev
);
2305 v4l2_async_nf_init(&pcdev
->notifier
, &pcdev
->v4l2_dev
);
2307 pcdev
->pdata
= pdev
->dev
.platform_data
;
2309 struct v4l2_async_connection
*asd
;
2311 pcdev
->platform_flags
= pcdev
->pdata
->flags
;
2312 pcdev
->mclk
= pcdev
->pdata
->mclk_10khz
* 10000;
2313 asd
= v4l2_async_nf_add_i2c(&pcdev
->notifier
,
2314 pcdev
->pdata
->sensor_i2c_adapter_id
,
2315 pcdev
->pdata
->sensor_i2c_address
,
2316 struct v4l2_async_connection
);
2319 } else if (pdev
->dev
.of_node
) {
2320 err
= pxa_camera_pdata_from_dt(&pdev
->dev
, pcdev
);
2325 goto exit_v4l2_device_unregister
;
2327 if (!(pcdev
->platform_flags
& (PXA_CAMERA_DATAWIDTH_8
|
2328 PXA_CAMERA_DATAWIDTH_9
| PXA_CAMERA_DATAWIDTH_10
))) {
2330 * Platform hasn't set available data widths. This is bad.
2331 * Warn and use a default.
2333 dev_warn(&pdev
->dev
, "WARNING! Platform hasn't set available data widths, using default 10 bit\n");
2334 pcdev
->platform_flags
|= PXA_CAMERA_DATAWIDTH_10
;
2336 if (pcdev
->platform_flags
& PXA_CAMERA_DATAWIDTH_8
)
2337 pcdev
->width_flags
= 1 << 7;
2338 if (pcdev
->platform_flags
& PXA_CAMERA_DATAWIDTH_9
)
2339 pcdev
->width_flags
|= 1 << 8;
2340 if (pcdev
->platform_flags
& PXA_CAMERA_DATAWIDTH_10
)
2341 pcdev
->width_flags
|= 1 << 9;
2343 dev_warn(&pdev
->dev
,
2344 "mclk == 0! Please, fix your platform data. Using default 20MHz\n");
2345 pcdev
->mclk
= 20000000;
2348 pcdev
->mclk_divisor
= mclk_get_divisor(pdev
, pcdev
);
2350 INIT_LIST_HEAD(&pcdev
->capture
);
2351 spin_lock_init(&pcdev
->lock
);
2352 mutex_init(&pcdev
->mlock
);
2355 pcdev
->dma_chans
[0] = dma_request_chan(&pdev
->dev
, "CI_Y");
2356 if (IS_ERR(pcdev
->dma_chans
[0])) {
2357 dev_err(&pdev
->dev
, "Can't request DMA for Y\n");
2358 err
= PTR_ERR(pcdev
->dma_chans
[0]);
2359 goto exit_notifier_cleanup
;
2362 pcdev
->dma_chans
[1] = dma_request_chan(&pdev
->dev
, "CI_U");
2363 if (IS_ERR(pcdev
->dma_chans
[1])) {
2364 dev_err(&pdev
->dev
, "Can't request DMA for U\n");
2365 err
= PTR_ERR(pcdev
->dma_chans
[1]);
2366 goto exit_free_dma_y
;
2369 pcdev
->dma_chans
[2] = dma_request_chan(&pdev
->dev
, "CI_V");
2370 if (IS_ERR(pcdev
->dma_chans
[2])) {
2371 dev_err(&pdev
->dev
, "Can't request DMA for V\n");
2372 err
= PTR_ERR(pcdev
->dma_chans
[2]);
2373 goto exit_free_dma_u
;
2376 for (i
= 0; i
< 3; i
++) {
2377 config
.src_addr
= pcdev
->res
->start
+ CIBR0
+ i
* 8;
2378 err
= dmaengine_slave_config(pcdev
->dma_chans
[i
], &config
);
2380 dev_err(&pdev
->dev
, "dma slave config failed: %d\n",
2386 tasklet_setup(&pcdev
->task_eof
, pxa_camera_eof
);
2388 pxa_camera_activate(pcdev
);
2390 platform_set_drvdata(pdev
, pcdev
);
2392 err
= pxa_camera_init_videobuf2(pcdev
);
2394 goto exit_deactivate
;
2397 err
= devm_request_irq(&pdev
->dev
, pcdev
->irq
, pxa_camera_irq
, 0,
2398 PXA_CAM_DRV_NAME
, pcdev
);
2400 dev_err(&pdev
->dev
, "Camera interrupt register failed\n");
2401 goto exit_deactivate
;
2404 pcdev
->notifier
.ops
= &pxa_camera_sensor_ops
;
2405 err
= v4l2_async_nf_register(&pcdev
->notifier
);
2407 goto exit_deactivate
;
2411 pxa_camera_deactivate(pcdev
);
2412 tasklet_kill(&pcdev
->task_eof
);
2414 dma_release_channel(pcdev
->dma_chans
[2]);
2416 dma_release_channel(pcdev
->dma_chans
[1]);
2418 dma_release_channel(pcdev
->dma_chans
[0]);
2419 exit_notifier_cleanup
:
2420 v4l2_async_nf_cleanup(&pcdev
->notifier
);
2421 exit_v4l2_device_unregister
:
2422 v4l2_device_unregister(&pcdev
->v4l2_dev
);
2426 static void pxa_camera_remove(struct platform_device
*pdev
)
2428 struct pxa_camera_dev
*pcdev
= platform_get_drvdata(pdev
);
2430 pxa_camera_deactivate(pcdev
);
2431 tasklet_kill(&pcdev
->task_eof
);
2432 dma_release_channel(pcdev
->dma_chans
[0]);
2433 dma_release_channel(pcdev
->dma_chans
[1]);
2434 dma_release_channel(pcdev
->dma_chans
[2]);
2436 v4l2_async_nf_unregister(&pcdev
->notifier
);
2437 v4l2_async_nf_cleanup(&pcdev
->notifier
);
2439 v4l2_device_unregister(&pcdev
->v4l2_dev
);
2441 dev_info(&pdev
->dev
, "PXA Camera driver unloaded\n");
2444 static const struct dev_pm_ops pxa_camera_pm
= {
2445 .suspend
= pxa_camera_suspend
,
2446 .resume
= pxa_camera_resume
,
2449 static const struct of_device_id pxa_camera_of_match
[] = {
2450 { .compatible
= "marvell,pxa270-qci", },
2453 MODULE_DEVICE_TABLE(of
, pxa_camera_of_match
);
2455 static struct platform_driver pxa_camera_driver
= {
2457 .name
= PXA_CAM_DRV_NAME
,
2458 .pm
= &pxa_camera_pm
,
2459 .of_match_table
= pxa_camera_of_match
,
2461 .probe
= pxa_camera_probe
,
2462 .remove_new
= pxa_camera_remove
,
2465 module_platform_driver(pxa_camera_driver
);
2467 MODULE_DESCRIPTION("PXA27x Camera Driver");
2468 MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>");
2469 MODULE_LICENSE("GPL");
2470 MODULE_VERSION(PXA_CAM_VERSION
);
2471 MODULE_ALIAS("platform:" PXA_CAM_DRV_NAME
);