2 * Samsung S5P/EXYNOS4 SoC series MIPI-CSI receiver driver
4 * Copyright (C) 2011 - 2012 Samsung Electronics Co., Ltd.
5 * Sylwester Nawrocki <s.nawrocki@samsung.com>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
12 #include <linux/clk.h>
13 #include <linux/delay.h>
14 #include <linux/device.h>
15 #include <linux/errno.h>
16 #include <linux/interrupt.h>
18 #include <linux/irq.h>
19 #include <linux/kernel.h>
20 #include <linux/memory.h>
21 #include <linux/module.h>
22 #include <linux/platform_device.h>
23 #include <linux/pm_runtime.h>
24 #include <linux/regulator/consumer.h>
25 #include <linux/slab.h>
26 #include <linux/spinlock.h>
27 #include <linux/videodev2.h>
28 #include <media/v4l2-subdev.h>
29 #include <linux/platform_data/mipi-csis.h>
30 #include "mipi-csis.h"
33 module_param(debug
, int, 0644);
34 MODULE_PARM_DESC(debug
, "Debug level (0-2)");
36 /* Register map definition */
38 /* CSIS global control */
39 #define S5PCSIS_CTRL 0x00
40 #define S5PCSIS_CTRL_DPDN_DEFAULT (0 << 31)
41 #define S5PCSIS_CTRL_DPDN_SWAP (1 << 31)
42 #define S5PCSIS_CTRL_ALIGN_32BIT (1 << 20)
43 #define S5PCSIS_CTRL_UPDATE_SHADOW (1 << 16)
44 #define S5PCSIS_CTRL_WCLK_EXTCLK (1 << 8)
45 #define S5PCSIS_CTRL_RESET (1 << 4)
46 #define S5PCSIS_CTRL_ENABLE (1 << 0)
49 #define S5PCSIS_DPHYCTRL 0x04
50 #define S5PCSIS_DPHYCTRL_HSS_MASK (0x1f << 27)
51 #define S5PCSIS_DPHYCTRL_ENABLE (0x1f << 0)
53 #define S5PCSIS_CONFIG 0x08
54 #define S5PCSIS_CFG_FMT_YCBCR422_8BIT (0x1e << 2)
55 #define S5PCSIS_CFG_FMT_RAW8 (0x2a << 2)
56 #define S5PCSIS_CFG_FMT_RAW10 (0x2b << 2)
57 #define S5PCSIS_CFG_FMT_RAW12 (0x2c << 2)
58 /* User defined formats, x = 1...4 */
59 #define S5PCSIS_CFG_FMT_USER(x) ((0x30 + x - 1) << 2)
60 #define S5PCSIS_CFG_FMT_MASK (0x3f << 2)
61 #define S5PCSIS_CFG_NR_LANE_MASK 3
64 #define S5PCSIS_INTMSK 0x10
65 #define S5PCSIS_INTMSK_EN_ALL 0xf000103f
66 #define S5PCSIS_INTMSK_EVEN_BEFORE (1 << 31)
67 #define S5PCSIS_INTMSK_EVEN_AFTER (1 << 30)
68 #define S5PCSIS_INTMSK_ODD_BEFORE (1 << 29)
69 #define S5PCSIS_INTMSK_ODD_AFTER (1 << 28)
70 #define S5PCSIS_INTMSK_ERR_SOT_HS (1 << 12)
71 #define S5PCSIS_INTMSK_ERR_LOST_FS (1 << 5)
72 #define S5PCSIS_INTMSK_ERR_LOST_FE (1 << 4)
73 #define S5PCSIS_INTMSK_ERR_OVER (1 << 3)
74 #define S5PCSIS_INTMSK_ERR_ECC (1 << 2)
75 #define S5PCSIS_INTMSK_ERR_CRC (1 << 1)
76 #define S5PCSIS_INTMSK_ERR_UNKNOWN (1 << 0)
78 /* Interrupt source */
79 #define S5PCSIS_INTSRC 0x14
80 #define S5PCSIS_INTSRC_EVEN_BEFORE (1 << 31)
81 #define S5PCSIS_INTSRC_EVEN_AFTER (1 << 30)
82 #define S5PCSIS_INTSRC_EVEN (0x3 << 30)
83 #define S5PCSIS_INTSRC_ODD_BEFORE (1 << 29)
84 #define S5PCSIS_INTSRC_ODD_AFTER (1 << 28)
85 #define S5PCSIS_INTSRC_ODD (0x3 << 28)
86 #define S5PCSIS_INTSRC_NON_IMAGE_DATA (0xff << 28)
87 #define S5PCSIS_INTSRC_ERR_SOT_HS (0xf << 12)
88 #define S5PCSIS_INTSRC_ERR_LOST_FS (1 << 5)
89 #define S5PCSIS_INTSRC_ERR_LOST_FE (1 << 4)
90 #define S5PCSIS_INTSRC_ERR_OVER (1 << 3)
91 #define S5PCSIS_INTSRC_ERR_ECC (1 << 2)
92 #define S5PCSIS_INTSRC_ERR_CRC (1 << 1)
93 #define S5PCSIS_INTSRC_ERR_UNKNOWN (1 << 0)
94 #define S5PCSIS_INTSRC_ERRORS 0xf03f
96 /* Pixel resolution */
97 #define S5PCSIS_RESOL 0x2c
98 #define CSIS_MAX_PIX_WIDTH 0xffff
99 #define CSIS_MAX_PIX_HEIGHT 0xffff
101 /* Non-image packet data buffers */
102 #define S5PCSIS_PKTDATA_ODD 0x2000
103 #define S5PCSIS_PKTDATA_EVEN 0x3000
104 #define S5PCSIS_PKTDATA_SIZE SZ_4K
111 static char *csi_clock_name
[] = {
112 [CSIS_CLK_MUX
] = "sclk_csis",
113 [CSIS_CLK_GATE
] = "csis",
115 #define NUM_CSIS_CLOCKS ARRAY_SIZE(csi_clock_name)
117 static const char * const csis_supply_name
[] = {
118 "vddcore", /* CSIS Core (1.0V, 1.1V or 1.2V) suppply */
119 "vddio", /* CSIS I/O and PLL (1.8V) supply */
121 #define CSIS_NUM_SUPPLIES ARRAY_SIZE(csis_supply_name)
129 struct s5pcsis_event
{
131 const char * const name
;
132 unsigned int counter
;
135 static const struct s5pcsis_event s5pcsis_events
[] = {
137 { S5PCSIS_INTSRC_ERR_SOT_HS
, "SOT Error" },
138 { S5PCSIS_INTSRC_ERR_LOST_FS
, "Lost Frame Start Error" },
139 { S5PCSIS_INTSRC_ERR_LOST_FE
, "Lost Frame End Error" },
140 { S5PCSIS_INTSRC_ERR_OVER
, "FIFO Overflow Error" },
141 { S5PCSIS_INTSRC_ERR_ECC
, "ECC Error" },
142 { S5PCSIS_INTSRC_ERR_CRC
, "CRC Error" },
143 { S5PCSIS_INTSRC_ERR_UNKNOWN
, "Unknown Error" },
144 /* Non-image data receive events */
145 { S5PCSIS_INTSRC_EVEN_BEFORE
, "Non-image data before even frame" },
146 { S5PCSIS_INTSRC_EVEN_AFTER
, "Non-image data after even frame" },
147 { S5PCSIS_INTSRC_ODD_BEFORE
, "Non-image data before odd frame" },
148 { S5PCSIS_INTSRC_ODD_AFTER
, "Non-image data after odd frame" },
150 #define S5PCSIS_NUM_EVENTS ARRAY_SIZE(s5pcsis_events)
158 * struct csis_state - the driver's internal state data structure
159 * @lock: mutex serializing the subdev and power management operations,
160 * protecting @format and @flags members
161 * @pads: CSIS pads array
162 * @sd: v4l2_subdev associated with CSIS device instance
163 * @index: the hardware instance index
164 * @pdev: CSIS platform device
165 * @regs: mmaped I/O registers memory
166 * @supplies: CSIS regulator supplies
167 * @clock: CSIS clocks
168 * @irq: requested s5p-mipi-csis irq number
169 * @flags: the state variable for power and streaming control
170 * @csis_fmt: current CSIS pixel format
171 * @format: common media bus format for the source and sink pad
172 * @slock: spinlock protecting structure members below
173 * @pkt_buf: the frame embedded (non-image) data buffer
174 * @events: MIPI-CSIS event (error) counters
178 struct media_pad pads
[CSIS_PADS_NUM
];
179 struct v4l2_subdev sd
;
181 struct platform_device
*pdev
;
183 struct regulator_bulk_data supplies
[CSIS_NUM_SUPPLIES
];
184 struct clk
*clock
[NUM_CSIS_CLOCKS
];
187 const struct csis_pix_format
*csis_fmt
;
188 struct v4l2_mbus_framefmt format
;
190 struct spinlock slock
;
191 struct csis_pktbuf pkt_buf
;
192 struct s5pcsis_event events
[S5PCSIS_NUM_EVENTS
];
196 * struct csis_pix_format - CSIS pixel format description
197 * @pix_width_alignment: horizontal pixel alignment, width will be
198 * multiple of 2^pix_width_alignment
199 * @code: corresponding media bus code
200 * @fmt_reg: S5PCSIS_CONFIG register value
201 * @data_alignment: MIPI-CSI data alignment in bits
203 struct csis_pix_format
{
204 unsigned int pix_width_alignment
;
205 enum v4l2_mbus_pixelcode code
;
210 static const struct csis_pix_format s5pcsis_formats
[] = {
212 .code
= V4L2_MBUS_FMT_VYUY8_2X8
,
213 .fmt_reg
= S5PCSIS_CFG_FMT_YCBCR422_8BIT
,
214 .data_alignment
= 32,
216 .code
= V4L2_MBUS_FMT_JPEG_1X8
,
217 .fmt_reg
= S5PCSIS_CFG_FMT_USER(1),
218 .data_alignment
= 32,
220 .code
= V4L2_MBUS_FMT_S5C_UYVY_JPEG_1X8
,
221 .fmt_reg
= S5PCSIS_CFG_FMT_USER(1),
222 .data_alignment
= 32,
226 #define s5pcsis_write(__csis, __r, __v) writel(__v, __csis->regs + __r)
227 #define s5pcsis_read(__csis, __r) readl(__csis->regs + __r)
229 static struct csis_state
*sd_to_csis_state(struct v4l2_subdev
*sdev
)
231 return container_of(sdev
, struct csis_state
, sd
);
234 static const struct csis_pix_format
*find_csis_format(
235 struct v4l2_mbus_framefmt
*mf
)
239 for (i
= 0; i
< ARRAY_SIZE(s5pcsis_formats
); i
++)
240 if (mf
->code
== s5pcsis_formats
[i
].code
)
241 return &s5pcsis_formats
[i
];
245 static void s5pcsis_enable_interrupts(struct csis_state
*state
, bool on
)
247 u32 val
= s5pcsis_read(state
, S5PCSIS_INTMSK
);
249 val
= on
? val
| S5PCSIS_INTMSK_EN_ALL
:
250 val
& ~S5PCSIS_INTMSK_EN_ALL
;
251 s5pcsis_write(state
, S5PCSIS_INTMSK
, val
);
254 static void s5pcsis_reset(struct csis_state
*state
)
256 u32 val
= s5pcsis_read(state
, S5PCSIS_CTRL
);
258 s5pcsis_write(state
, S5PCSIS_CTRL
, val
| S5PCSIS_CTRL_RESET
);
262 static void s5pcsis_system_enable(struct csis_state
*state
, int on
)
266 val
= s5pcsis_read(state
, S5PCSIS_CTRL
);
268 val
|= S5PCSIS_CTRL_ENABLE
;
270 val
&= ~S5PCSIS_CTRL_ENABLE
;
271 s5pcsis_write(state
, S5PCSIS_CTRL
, val
);
273 val
= s5pcsis_read(state
, S5PCSIS_DPHYCTRL
);
275 val
|= S5PCSIS_DPHYCTRL_ENABLE
;
277 val
&= ~S5PCSIS_DPHYCTRL_ENABLE
;
278 s5pcsis_write(state
, S5PCSIS_DPHYCTRL
, val
);
281 /* Called with the state.lock mutex held */
282 static void __s5pcsis_set_format(struct csis_state
*state
)
284 struct v4l2_mbus_framefmt
*mf
= &state
->format
;
287 v4l2_dbg(1, debug
, &state
->sd
, "fmt: %#x, %d x %d\n",
288 mf
->code
, mf
->width
, mf
->height
);
291 val
= s5pcsis_read(state
, S5PCSIS_CONFIG
);
292 val
= (val
& ~S5PCSIS_CFG_FMT_MASK
) | state
->csis_fmt
->fmt_reg
;
293 s5pcsis_write(state
, S5PCSIS_CONFIG
, val
);
295 /* Pixel resolution */
296 val
= (mf
->width
<< 16) | mf
->height
;
297 s5pcsis_write(state
, S5PCSIS_RESOL
, val
);
300 static void s5pcsis_set_hsync_settle(struct csis_state
*state
, int settle
)
302 u32 val
= s5pcsis_read(state
, S5PCSIS_DPHYCTRL
);
304 val
= (val
& ~S5PCSIS_DPHYCTRL_HSS_MASK
) | (settle
<< 27);
305 s5pcsis_write(state
, S5PCSIS_DPHYCTRL
, val
);
308 static void s5pcsis_set_params(struct csis_state
*state
)
310 struct s5p_platform_mipi_csis
*pdata
= state
->pdev
->dev
.platform_data
;
313 val
= s5pcsis_read(state
, S5PCSIS_CONFIG
);
314 val
= (val
& ~S5PCSIS_CFG_NR_LANE_MASK
) | (pdata
->lanes
- 1);
315 s5pcsis_write(state
, S5PCSIS_CONFIG
, val
);
317 __s5pcsis_set_format(state
);
318 s5pcsis_set_hsync_settle(state
, pdata
->hs_settle
);
320 val
= s5pcsis_read(state
, S5PCSIS_CTRL
);
321 if (state
->csis_fmt
->data_alignment
== 32)
322 val
|= S5PCSIS_CTRL_ALIGN_32BIT
;
324 val
&= ~S5PCSIS_CTRL_ALIGN_32BIT
;
326 val
&= ~S5PCSIS_CTRL_WCLK_EXTCLK
;
327 if (pdata
->wclk_source
)
328 val
|= S5PCSIS_CTRL_WCLK_EXTCLK
;
329 s5pcsis_write(state
, S5PCSIS_CTRL
, val
);
331 /* Update the shadow register. */
332 val
= s5pcsis_read(state
, S5PCSIS_CTRL
);
333 s5pcsis_write(state
, S5PCSIS_CTRL
, val
| S5PCSIS_CTRL_UPDATE_SHADOW
);
336 static void s5pcsis_clk_put(struct csis_state
*state
)
340 for (i
= 0; i
< NUM_CSIS_CLOCKS
; i
++) {
341 if (IS_ERR_OR_NULL(state
->clock
[i
]))
343 clk_unprepare(state
->clock
[i
]);
344 clk_put(state
->clock
[i
]);
345 state
->clock
[i
] = NULL
;
349 static int s5pcsis_clk_get(struct csis_state
*state
)
351 struct device
*dev
= &state
->pdev
->dev
;
354 for (i
= 0; i
< NUM_CSIS_CLOCKS
; i
++) {
355 state
->clock
[i
] = clk_get(dev
, csi_clock_name
[i
]);
356 if (IS_ERR(state
->clock
[i
]))
358 ret
= clk_prepare(state
->clock
[i
]);
360 clk_put(state
->clock
[i
]);
361 state
->clock
[i
] = NULL
;
367 s5pcsis_clk_put(state
);
368 dev_err(dev
, "failed to get clock: %s\n", csi_clock_name
[i
]);
372 static void s5pcsis_start_stream(struct csis_state
*state
)
374 s5pcsis_reset(state
);
375 s5pcsis_set_params(state
);
376 s5pcsis_system_enable(state
, true);
377 s5pcsis_enable_interrupts(state
, true);
380 static void s5pcsis_stop_stream(struct csis_state
*state
)
382 s5pcsis_enable_interrupts(state
, false);
383 s5pcsis_system_enable(state
, false);
386 static void s5pcsis_clear_counters(struct csis_state
*state
)
391 spin_lock_irqsave(&state
->slock
, flags
);
392 for (i
= 0; i
< S5PCSIS_NUM_EVENTS
; i
++)
393 state
->events
[i
].counter
= 0;
394 spin_unlock_irqrestore(&state
->slock
, flags
);
397 static void s5pcsis_log_counters(struct csis_state
*state
, bool non_errors
)
399 int i
= non_errors
? S5PCSIS_NUM_EVENTS
: S5PCSIS_NUM_EVENTS
- 4;
402 spin_lock_irqsave(&state
->slock
, flags
);
404 for (i
--; i
>= 0; i
--)
405 if (state
->events
[i
].counter
>= 0)
406 v4l2_info(&state
->sd
, "%s events: %d\n",
407 state
->events
[i
].name
,
408 state
->events
[i
].counter
);
410 spin_unlock_irqrestore(&state
->slock
, flags
);
414 * V4L2 subdev operations
416 static int s5pcsis_s_power(struct v4l2_subdev
*sd
, int on
)
418 struct csis_state
*state
= sd_to_csis_state(sd
);
419 struct device
*dev
= &state
->pdev
->dev
;
422 return pm_runtime_get_sync(dev
);
424 return pm_runtime_put_sync(dev
);
427 static int s5pcsis_s_stream(struct v4l2_subdev
*sd
, int enable
)
429 struct csis_state
*state
= sd_to_csis_state(sd
);
432 v4l2_dbg(1, debug
, sd
, "%s: %d, state: 0x%x\n",
433 __func__
, enable
, state
->flags
);
436 s5pcsis_clear_counters(state
);
437 ret
= pm_runtime_get_sync(&state
->pdev
->dev
);
442 mutex_lock(&state
->lock
);
444 if (state
->flags
& ST_SUSPENDED
) {
448 s5pcsis_start_stream(state
);
449 state
->flags
|= ST_STREAMING
;
451 s5pcsis_stop_stream(state
);
452 state
->flags
&= ~ST_STREAMING
;
454 s5pcsis_log_counters(state
, true);
457 mutex_unlock(&state
->lock
);
459 pm_runtime_put(&state
->pdev
->dev
);
461 return ret
== 1 ? 0 : ret
;
464 static int s5pcsis_enum_mbus_code(struct v4l2_subdev
*sd
,
465 struct v4l2_subdev_fh
*fh
,
466 struct v4l2_subdev_mbus_code_enum
*code
)
468 if (code
->index
>= ARRAY_SIZE(s5pcsis_formats
))
471 code
->code
= s5pcsis_formats
[code
->index
].code
;
475 static struct csis_pix_format
const *s5pcsis_try_format(
476 struct v4l2_mbus_framefmt
*mf
)
478 struct csis_pix_format
const *csis_fmt
;
480 csis_fmt
= find_csis_format(mf
);
481 if (csis_fmt
== NULL
)
482 csis_fmt
= &s5pcsis_formats
[0];
484 mf
->code
= csis_fmt
->code
;
485 v4l_bound_align_image(&mf
->width
, 1, CSIS_MAX_PIX_WIDTH
,
486 csis_fmt
->pix_width_alignment
,
487 &mf
->height
, 1, CSIS_MAX_PIX_HEIGHT
, 1,
492 static struct v4l2_mbus_framefmt
*__s5pcsis_get_format(
493 struct csis_state
*state
, struct v4l2_subdev_fh
*fh
,
494 u32 pad
, enum v4l2_subdev_format_whence which
)
496 if (which
== V4L2_SUBDEV_FORMAT_TRY
)
497 return fh
? v4l2_subdev_get_try_format(fh
, pad
) : NULL
;
499 return &state
->format
;
502 static int s5pcsis_set_fmt(struct v4l2_subdev
*sd
, struct v4l2_subdev_fh
*fh
,
503 struct v4l2_subdev_format
*fmt
)
505 struct csis_state
*state
= sd_to_csis_state(sd
);
506 struct csis_pix_format
const *csis_fmt
;
507 struct v4l2_mbus_framefmt
*mf
;
509 if (fmt
->pad
!= CSIS_PAD_SOURCE
&& fmt
->pad
!= CSIS_PAD_SINK
)
512 mf
= __s5pcsis_get_format(state
, fh
, fmt
->pad
, fmt
->which
);
514 if (fmt
->pad
== CSIS_PAD_SOURCE
) {
516 mutex_lock(&state
->lock
);
518 mutex_unlock(&state
->lock
);
522 csis_fmt
= s5pcsis_try_format(&fmt
->format
);
524 mutex_lock(&state
->lock
);
526 if (fmt
->which
== V4L2_SUBDEV_FORMAT_ACTIVE
)
527 state
->csis_fmt
= csis_fmt
;
528 mutex_unlock(&state
->lock
);
533 static int s5pcsis_get_fmt(struct v4l2_subdev
*sd
, struct v4l2_subdev_fh
*fh
,
534 struct v4l2_subdev_format
*fmt
)
536 struct csis_state
*state
= sd_to_csis_state(sd
);
537 struct v4l2_mbus_framefmt
*mf
;
539 if (fmt
->pad
!= CSIS_PAD_SOURCE
&& fmt
->pad
!= CSIS_PAD_SINK
)
542 mf
= __s5pcsis_get_format(state
, fh
, fmt
->pad
, fmt
->which
);
546 mutex_lock(&state
->lock
);
548 mutex_unlock(&state
->lock
);
552 static int s5pcsis_s_rx_buffer(struct v4l2_subdev
*sd
, void *buf
,
555 struct csis_state
*state
= sd_to_csis_state(sd
);
558 *size
= min_t(unsigned int, *size
, S5PCSIS_PKTDATA_SIZE
);
560 spin_lock_irqsave(&state
->slock
, flags
);
561 state
->pkt_buf
.data
= buf
;
562 state
->pkt_buf
.len
= *size
;
563 spin_unlock_irqrestore(&state
->slock
, flags
);
568 static int s5pcsis_log_status(struct v4l2_subdev
*sd
)
570 struct csis_state
*state
= sd_to_csis_state(sd
);
572 s5pcsis_log_counters(state
, true);
576 static int s5pcsis_open(struct v4l2_subdev
*sd
, struct v4l2_subdev_fh
*fh
)
578 struct v4l2_mbus_framefmt
*format
= v4l2_subdev_get_try_format(fh
, 0);
580 format
->colorspace
= V4L2_COLORSPACE_JPEG
;
581 format
->code
= s5pcsis_formats
[0].code
;
582 format
->width
= S5PCSIS_DEF_PIX_WIDTH
;
583 format
->height
= S5PCSIS_DEF_PIX_HEIGHT
;
584 format
->field
= V4L2_FIELD_NONE
;
589 static const struct v4l2_subdev_internal_ops s5pcsis_sd_internal_ops
= {
590 .open
= s5pcsis_open
,
593 static struct v4l2_subdev_core_ops s5pcsis_core_ops
= {
594 .s_power
= s5pcsis_s_power
,
595 .log_status
= s5pcsis_log_status
,
598 static struct v4l2_subdev_pad_ops s5pcsis_pad_ops
= {
599 .enum_mbus_code
= s5pcsis_enum_mbus_code
,
600 .get_fmt
= s5pcsis_get_fmt
,
601 .set_fmt
= s5pcsis_set_fmt
,
604 static struct v4l2_subdev_video_ops s5pcsis_video_ops
= {
605 .s_rx_buffer
= s5pcsis_s_rx_buffer
,
606 .s_stream
= s5pcsis_s_stream
,
609 static struct v4l2_subdev_ops s5pcsis_subdev_ops
= {
610 .core
= &s5pcsis_core_ops
,
611 .pad
= &s5pcsis_pad_ops
,
612 .video
= &s5pcsis_video_ops
,
615 static irqreturn_t
s5pcsis_irq_handler(int irq
, void *dev_id
)
617 struct csis_state
*state
= dev_id
;
618 struct csis_pktbuf
*pktbuf
= &state
->pkt_buf
;
622 status
= s5pcsis_read(state
, S5PCSIS_INTSRC
);
623 spin_lock_irqsave(&state
->slock
, flags
);
625 if ((status
& S5PCSIS_INTSRC_NON_IMAGE_DATA
) && pktbuf
->data
) {
628 if (status
& S5PCSIS_INTSRC_EVEN
)
629 offset
= S5PCSIS_PKTDATA_EVEN
;
631 offset
= S5PCSIS_PKTDATA_ODD
;
633 memcpy(pktbuf
->data
, state
->regs
+ offset
, pktbuf
->len
);
638 /* Update the event/error counters */
639 if ((status
& S5PCSIS_INTSRC_ERRORS
) || debug
) {
641 for (i
= 0; i
< S5PCSIS_NUM_EVENTS
; i
++) {
642 if (!(status
& state
->events
[i
].mask
))
644 state
->events
[i
].counter
++;
645 v4l2_dbg(2, debug
, &state
->sd
, "%s: %d\n",
646 state
->events
[i
].name
,
647 state
->events
[i
].counter
);
649 v4l2_dbg(2, debug
, &state
->sd
, "status: %08x\n", status
);
651 spin_unlock_irqrestore(&state
->slock
, flags
);
653 s5pcsis_write(state
, S5PCSIS_INTSRC
, status
);
657 static int __devinit
s5pcsis_probe(struct platform_device
*pdev
)
659 struct s5p_platform_mipi_csis
*pdata
;
660 struct resource
*mem_res
;
661 struct csis_state
*state
;
665 state
= devm_kzalloc(&pdev
->dev
, sizeof(*state
), GFP_KERNEL
);
669 mutex_init(&state
->lock
);
670 spin_lock_init(&state
->slock
);
673 state
->index
= max(0, pdev
->id
);
675 pdata
= pdev
->dev
.platform_data
;
677 dev_err(&pdev
->dev
, "Platform data not fully specified\n");
681 if ((state
->index
== 1 && pdata
->lanes
> CSIS1_MAX_LANES
) ||
682 pdata
->lanes
> CSIS0_MAX_LANES
) {
683 dev_err(&pdev
->dev
, "Unsupported number of data lanes: %d\n",
688 mem_res
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
689 state
->regs
= devm_request_and_ioremap(&pdev
->dev
, mem_res
);
690 if (state
->regs
== NULL
) {
691 dev_err(&pdev
->dev
, "Failed to request and remap io memory\n");
695 state
->irq
= platform_get_irq(pdev
, 0);
696 if (state
->irq
< 0) {
697 dev_err(&pdev
->dev
, "Failed to get irq\n");
701 for (i
= 0; i
< CSIS_NUM_SUPPLIES
; i
++)
702 state
->supplies
[i
].supply
= csis_supply_name
[i
];
704 ret
= regulator_bulk_get(&pdev
->dev
, CSIS_NUM_SUPPLIES
,
709 ret
= s5pcsis_clk_get(state
);
713 clk_enable(state
->clock
[CSIS_CLK_MUX
]);
715 clk_set_rate(state
->clock
[CSIS_CLK_MUX
], pdata
->clk_rate
);
717 dev_WARN(&pdev
->dev
, "No clock frequency specified!\n");
719 ret
= devm_request_irq(&pdev
->dev
, state
->irq
, s5pcsis_irq_handler
,
720 0, dev_name(&pdev
->dev
), state
);
722 dev_err(&pdev
->dev
, "Interrupt request failed\n");
726 v4l2_subdev_init(&state
->sd
, &s5pcsis_subdev_ops
);
727 state
->sd
.owner
= THIS_MODULE
;
728 strlcpy(state
->sd
.name
, dev_name(&pdev
->dev
), sizeof(state
->sd
.name
));
729 state
->sd
.flags
|= V4L2_SUBDEV_FL_HAS_DEVNODE
;
730 state
->csis_fmt
= &s5pcsis_formats
[0];
732 state
->format
.code
= s5pcsis_formats
[0].code
;
733 state
->format
.width
= S5PCSIS_DEF_PIX_WIDTH
;
734 state
->format
.height
= S5PCSIS_DEF_PIX_HEIGHT
;
736 state
->pads
[CSIS_PAD_SINK
].flags
= MEDIA_PAD_FL_SINK
;
737 state
->pads
[CSIS_PAD_SOURCE
].flags
= MEDIA_PAD_FL_SOURCE
;
738 ret
= media_entity_init(&state
->sd
.entity
,
739 CSIS_PADS_NUM
, state
->pads
, 0);
743 /* This allows to retrieve the platform device id by the host driver */
744 v4l2_set_subdevdata(&state
->sd
, pdev
);
746 /* .. and a pointer to the subdev. */
747 platform_set_drvdata(pdev
, &state
->sd
);
749 memcpy(state
->events
, s5pcsis_events
, sizeof(state
->events
));
751 pm_runtime_enable(&pdev
->dev
);
755 regulator_bulk_free(CSIS_NUM_SUPPLIES
, state
->supplies
);
757 clk_disable(state
->clock
[CSIS_CLK_MUX
]);
758 s5pcsis_clk_put(state
);
762 static int s5pcsis_pm_suspend(struct device
*dev
, bool runtime
)
764 struct platform_device
*pdev
= to_platform_device(dev
);
765 struct v4l2_subdev
*sd
= platform_get_drvdata(pdev
);
766 struct csis_state
*state
= sd_to_csis_state(sd
);
769 v4l2_dbg(1, debug
, sd
, "%s: flags: 0x%x\n",
770 __func__
, state
->flags
);
772 mutex_lock(&state
->lock
);
773 if (state
->flags
& ST_POWERED
) {
774 s5pcsis_stop_stream(state
);
775 ret
= s5p_csis_phy_enable(state
->index
, false);
778 ret
= regulator_bulk_disable(CSIS_NUM_SUPPLIES
,
782 clk_disable(state
->clock
[CSIS_CLK_GATE
]);
783 state
->flags
&= ~ST_POWERED
;
785 state
->flags
|= ST_SUSPENDED
;
788 mutex_unlock(&state
->lock
);
789 return ret
? -EAGAIN
: 0;
792 static int s5pcsis_pm_resume(struct device
*dev
, bool runtime
)
794 struct platform_device
*pdev
= to_platform_device(dev
);
795 struct v4l2_subdev
*sd
= platform_get_drvdata(pdev
);
796 struct csis_state
*state
= sd_to_csis_state(sd
);
799 v4l2_dbg(1, debug
, sd
, "%s: flags: 0x%x\n",
800 __func__
, state
->flags
);
802 mutex_lock(&state
->lock
);
803 if (!runtime
&& !(state
->flags
& ST_SUSPENDED
))
806 if (!(state
->flags
& ST_POWERED
)) {
807 ret
= regulator_bulk_enable(CSIS_NUM_SUPPLIES
,
811 ret
= s5p_csis_phy_enable(state
->index
, true);
813 state
->flags
|= ST_POWERED
;
815 regulator_bulk_disable(CSIS_NUM_SUPPLIES
,
819 clk_enable(state
->clock
[CSIS_CLK_GATE
]);
821 if (state
->flags
& ST_STREAMING
)
822 s5pcsis_start_stream(state
);
824 state
->flags
&= ~ST_SUSPENDED
;
826 mutex_unlock(&state
->lock
);
827 return ret
? -EAGAIN
: 0;
830 #ifdef CONFIG_PM_SLEEP
831 static int s5pcsis_suspend(struct device
*dev
)
833 return s5pcsis_pm_suspend(dev
, false);
836 static int s5pcsis_resume(struct device
*dev
)
838 return s5pcsis_pm_resume(dev
, false);
842 #ifdef CONFIG_PM_RUNTIME
843 static int s5pcsis_runtime_suspend(struct device
*dev
)
845 return s5pcsis_pm_suspend(dev
, true);
848 static int s5pcsis_runtime_resume(struct device
*dev
)
850 return s5pcsis_pm_resume(dev
, true);
854 static int __devexit
s5pcsis_remove(struct platform_device
*pdev
)
856 struct v4l2_subdev
*sd
= platform_get_drvdata(pdev
);
857 struct csis_state
*state
= sd_to_csis_state(sd
);
859 pm_runtime_disable(&pdev
->dev
);
860 s5pcsis_pm_suspend(&pdev
->dev
, false);
861 clk_disable(state
->clock
[CSIS_CLK_MUX
]);
862 pm_runtime_set_suspended(&pdev
->dev
);
863 s5pcsis_clk_put(state
);
864 regulator_bulk_free(CSIS_NUM_SUPPLIES
, state
->supplies
);
866 media_entity_cleanup(&state
->sd
.entity
);
871 static const struct dev_pm_ops s5pcsis_pm_ops
= {
872 SET_RUNTIME_PM_OPS(s5pcsis_runtime_suspend
, s5pcsis_runtime_resume
,
874 SET_SYSTEM_SLEEP_PM_OPS(s5pcsis_suspend
, s5pcsis_resume
)
877 static struct platform_driver s5pcsis_driver
= {
878 .probe
= s5pcsis_probe
,
879 .remove
= __devexit_p(s5pcsis_remove
),
881 .name
= CSIS_DRIVER_NAME
,
882 .owner
= THIS_MODULE
,
883 .pm
= &s5pcsis_pm_ops
,
887 module_platform_driver(s5pcsis_driver
);
889 MODULE_AUTHOR("Sylwester Nawrocki <s.nawrocki@samsung.com>");
890 MODULE_DESCRIPTION("Samsung S5P/EXYNOS SoC MIPI-CSI2 receiver driver");
891 MODULE_LICENSE("GPL");