2 * Samsung S5P/EXYNOS SoC series MIPI-CSI receiver driver
4 * Copyright (C) 2011 - 2013 Samsung Electronics Co., Ltd.
5 * Author: 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>
23 #include <linux/of_graph.h>
24 #include <linux/phy/phy.h>
25 #include <linux/platform_data/mipi-csis.h>
26 #include <linux/platform_device.h>
27 #include <linux/pm_runtime.h>
28 #include <linux/regulator/consumer.h>
29 #include <linux/slab.h>
30 #include <linux/spinlock.h>
31 #include <linux/videodev2.h>
32 #include <media/s5p_fimc.h>
33 #include <media/v4l2-of.h>
34 #include <media/v4l2-subdev.h>
36 #include "mipi-csis.h"
39 module_param(debug, int, 0644);
40 MODULE_PARM_DESC(debug, "Debug level (0-2)");
42 /* Register map definition */
44 /* CSIS global control */
45 #define S5PCSIS_CTRL 0x00
46 #define S5PCSIS_CTRL_DPDN_DEFAULT (0 << 31)
47 #define S5PCSIS_CTRL_DPDN_SWAP (1 << 31)
48 #define S5PCSIS_CTRL_ALIGN_32BIT (1 << 20)
49 #define S5PCSIS_CTRL_UPDATE_SHADOW (1 << 16)
50 #define S5PCSIS_CTRL_WCLK_EXTCLK (1 << 8)
51 #define S5PCSIS_CTRL_RESET (1 << 4)
52 #define S5PCSIS_CTRL_ENABLE (1 << 0)
55 #define S5PCSIS_DPHYCTRL 0x04
56 #define S5PCSIS_DPHYCTRL_HSS_MASK (0x1f << 27)
57 #define S5PCSIS_DPHYCTRL_ENABLE (0x1f << 0)
59 #define S5PCSIS_CONFIG 0x08
60 #define S5PCSIS_CFG_FMT_YCBCR422_8BIT (0x1e << 2)
61 #define S5PCSIS_CFG_FMT_RAW8 (0x2a << 2)
62 #define S5PCSIS_CFG_FMT_RAW10 (0x2b << 2)
63 #define S5PCSIS_CFG_FMT_RAW12 (0x2c << 2)
64 /* User defined formats, x = 1...4 */
65 #define S5PCSIS_CFG_FMT_USER(x) ((0x30 + x - 1) << 2)
66 #define S5PCSIS_CFG_FMT_MASK (0x3f << 2)
67 #define S5PCSIS_CFG_NR_LANE_MASK 3
70 #define S5PCSIS_INTMSK 0x10
71 #define S5PCSIS_INTMSK_EVEN_BEFORE (1 << 31)
72 #define S5PCSIS_INTMSK_EVEN_AFTER (1 << 30)
73 #define S5PCSIS_INTMSK_ODD_BEFORE (1 << 29)
74 #define S5PCSIS_INTMSK_ODD_AFTER (1 << 28)
75 #define S5PCSIS_INTMSK_FRAME_START (1 << 27)
76 #define S5PCSIS_INTMSK_FRAME_END (1 << 26)
77 #define S5PCSIS_INTMSK_ERR_SOT_HS (1 << 12)
78 #define S5PCSIS_INTMSK_ERR_LOST_FS (1 << 5)
79 #define S5PCSIS_INTMSK_ERR_LOST_FE (1 << 4)
80 #define S5PCSIS_INTMSK_ERR_OVER (1 << 3)
81 #define S5PCSIS_INTMSK_ERR_ECC (1 << 2)
82 #define S5PCSIS_INTMSK_ERR_CRC (1 << 1)
83 #define S5PCSIS_INTMSK_ERR_UNKNOWN (1 << 0)
84 #define S5PCSIS_INTMSK_EXYNOS4_EN_ALL 0xf000103f
85 #define S5PCSIS_INTMSK_EXYNOS5_EN_ALL 0xfc00103f
87 /* Interrupt source */
88 #define S5PCSIS_INTSRC 0x14
89 #define S5PCSIS_INTSRC_EVEN_BEFORE (1 << 31)
90 #define S5PCSIS_INTSRC_EVEN_AFTER (1 << 30)
91 #define S5PCSIS_INTSRC_EVEN (0x3 << 30)
92 #define S5PCSIS_INTSRC_ODD_BEFORE (1 << 29)
93 #define S5PCSIS_INTSRC_ODD_AFTER (1 << 28)
94 #define S5PCSIS_INTSRC_ODD (0x3 << 28)
95 #define S5PCSIS_INTSRC_NON_IMAGE_DATA (0xf << 28)
96 #define S5PCSIS_INTSRC_FRAME_START (1 << 27)
97 #define S5PCSIS_INTSRC_FRAME_END (1 << 26)
98 #define S5PCSIS_INTSRC_ERR_SOT_HS (0xf << 12)
99 #define S5PCSIS_INTSRC_ERR_LOST_FS (1 << 5)
100 #define S5PCSIS_INTSRC_ERR_LOST_FE (1 << 4)
101 #define S5PCSIS_INTSRC_ERR_OVER (1 << 3)
102 #define S5PCSIS_INTSRC_ERR_ECC (1 << 2)
103 #define S5PCSIS_INTSRC_ERR_CRC (1 << 1)
104 #define S5PCSIS_INTSRC_ERR_UNKNOWN (1 << 0)
105 #define S5PCSIS_INTSRC_ERRORS 0xf03f
107 /* Pixel resolution */
108 #define S5PCSIS_RESOL 0x2c
109 #define CSIS_MAX_PIX_WIDTH 0xffff
110 #define CSIS_MAX_PIX_HEIGHT 0xffff
112 /* Non-image packet data buffers */
113 #define S5PCSIS_PKTDATA_ODD 0x2000
114 #define S5PCSIS_PKTDATA_EVEN 0x3000
115 #define S5PCSIS_PKTDATA_SIZE SZ_4K
122 static char *csi_clock_name[] = {
123 [CSIS_CLK_MUX] = "sclk_csis",
124 [CSIS_CLK_GATE] = "csis",
126 #define NUM_CSIS_CLOCKS ARRAY_SIZE(csi_clock_name)
127 #define DEFAULT_SCLK_CSIS_FREQ 166000000UL
129 static const char * const csis_supply_name[] = {
130 "vddcore", /* CSIS Core (1.0V, 1.1V or 1.2V) suppply */
131 "vddio", /* CSIS I/O and PLL (1.8V) supply */
133 #define CSIS_NUM_SUPPLIES ARRAY_SIZE(csis_supply_name)
141 struct s5pcsis_event {
143 const char * const name;
144 unsigned int counter;
147 static const struct s5pcsis_event s5pcsis_events[] = {
149 { S5PCSIS_INTSRC_ERR_SOT_HS, "SOT Error" },
150 { S5PCSIS_INTSRC_ERR_LOST_FS, "Lost Frame Start Error" },
151 { S5PCSIS_INTSRC_ERR_LOST_FE, "Lost Frame End Error" },
152 { S5PCSIS_INTSRC_ERR_OVER, "FIFO Overflow Error" },
153 { S5PCSIS_INTSRC_ERR_ECC, "ECC Error" },
154 { S5PCSIS_INTSRC_ERR_CRC, "CRC Error" },
155 { S5PCSIS_INTSRC_ERR_UNKNOWN, "Unknown Error" },
156 /* Non-image data receive events */
157 { S5PCSIS_INTSRC_EVEN_BEFORE, "Non-image data before even frame" },
158 { S5PCSIS_INTSRC_EVEN_AFTER, "Non-image data after even frame" },
159 { S5PCSIS_INTSRC_ODD_BEFORE, "Non-image data before odd frame" },
160 { S5PCSIS_INTSRC_ODD_AFTER, "Non-image data after odd frame" },
161 /* Frame start/end */
162 { S5PCSIS_INTSRC_FRAME_START, "Frame Start" },
163 { S5PCSIS_INTSRC_FRAME_END, "Frame End" },
165 #define S5PCSIS_NUM_EVENTS ARRAY_SIZE(s5pcsis_events)
172 struct csis_drvdata {
173 /* Mask of all used interrupts in S5PCSIS_INTMSK register */
178 * struct csis_state - the driver's internal state data structure
179 * @lock: mutex serializing the subdev and power management operations,
180 * protecting @format and @flags members
181 * @pads: CSIS pads array
182 * @sd: v4l2_subdev associated with CSIS device instance
183 * @index: the hardware instance index
184 * @pdev: CSIS platform device
185 * @phy: pointer to the CSIS generic PHY
186 * @regs: mmaped I/O registers memory
187 * @supplies: CSIS regulator supplies
188 * @clock: CSIS clocks
189 * @irq: requested s5p-mipi-csis irq number
190 * @interrupt_mask: interrupt mask of the all used interrupts
191 * @flags: the state variable for power and streaming control
192 * @clock_frequency: device bus clock frequency
193 * @hs_settle: HS-RX settle time
194 * @num_lanes: number of MIPI-CSI data lanes used
195 * @max_num_lanes: maximum number of MIPI-CSI data lanes supported
196 * @wclk_ext: CSI wrapper clock: 0 - bus clock, 1 - external SCLK_CAM
197 * @csis_fmt: current CSIS pixel format
198 * @format: common media bus format for the source and sink pad
199 * @slock: spinlock protecting structure members below
200 * @pkt_buf: the frame embedded (non-image) data buffer
201 * @events: MIPI-CSIS event (error) counters
205 struct media_pad pads[CSIS_PADS_NUM];
206 struct v4l2_subdev sd;
208 struct platform_device *pdev;
211 struct regulator_bulk_data supplies[CSIS_NUM_SUPPLIES];
212 struct clk *clock[NUM_CSIS_CLOCKS];
223 const struct csis_pix_format *csis_fmt;
224 struct v4l2_mbus_framefmt format;
227 struct csis_pktbuf pkt_buf;
228 struct s5pcsis_event events[S5PCSIS_NUM_EVENTS];
232 * struct csis_pix_format - CSIS pixel format description
233 * @pix_width_alignment: horizontal pixel alignment, width will be
234 * multiple of 2^pix_width_alignment
235 * @code: corresponding media bus code
236 * @fmt_reg: S5PCSIS_CONFIG register value
237 * @data_alignment: MIPI-CSI data alignment in bits
239 struct csis_pix_format {
240 unsigned int pix_width_alignment;
241 enum v4l2_mbus_pixelcode code;
246 static const struct csis_pix_format s5pcsis_formats[] = {
248 .code = V4L2_MBUS_FMT_VYUY8_2X8,
249 .fmt_reg = S5PCSIS_CFG_FMT_YCBCR422_8BIT,
250 .data_alignment = 32,
252 .code = V4L2_MBUS_FMT_JPEG_1X8,
253 .fmt_reg = S5PCSIS_CFG_FMT_USER(1),
254 .data_alignment = 32,
256 .code = V4L2_MBUS_FMT_S5C_UYVY_JPEG_1X8,
257 .fmt_reg = S5PCSIS_CFG_FMT_USER(1),
258 .data_alignment = 32,
260 .code = V4L2_MBUS_FMT_SGRBG8_1X8,
261 .fmt_reg = S5PCSIS_CFG_FMT_RAW8,
262 .data_alignment = 24,
264 .code = V4L2_MBUS_FMT_SGRBG10_1X10,
265 .fmt_reg = S5PCSIS_CFG_FMT_RAW10,
266 .data_alignment = 24,
268 .code = V4L2_MBUS_FMT_SGRBG12_1X12,
269 .fmt_reg = S5PCSIS_CFG_FMT_RAW12,
270 .data_alignment = 24,
274 #define s5pcsis_write(__csis, __r, __v) writel(__v, __csis->regs + __r)
275 #define s5pcsis_read(__csis, __r) readl(__csis->regs + __r)
277 static struct csis_state *sd_to_csis_state(struct v4l2_subdev *sdev)
279 return container_of(sdev, struct csis_state, sd);
282 static const struct csis_pix_format *find_csis_format(
283 struct v4l2_mbus_framefmt *mf)
287 for (i = 0; i < ARRAY_SIZE(s5pcsis_formats); i++)
288 if (mf->code == s5pcsis_formats[i].code)
289 return &s5pcsis_formats[i];
293 static void s5pcsis_enable_interrupts(struct csis_state *state, bool on)
295 u32 val = s5pcsis_read(state, S5PCSIS_INTMSK);
297 val |= state->interrupt_mask;
299 val &= ~state->interrupt_mask;
300 s5pcsis_write(state, S5PCSIS_INTMSK, val);
303 static void s5pcsis_reset(struct csis_state *state)
305 u32 val = s5pcsis_read(state, S5PCSIS_CTRL);
307 s5pcsis_write(state, S5PCSIS_CTRL, val | S5PCSIS_CTRL_RESET);
311 static void s5pcsis_system_enable(struct csis_state *state, int on)
315 val = s5pcsis_read(state, S5PCSIS_CTRL);
317 val |= S5PCSIS_CTRL_ENABLE;
319 val &= ~S5PCSIS_CTRL_ENABLE;
320 s5pcsis_write(state, S5PCSIS_CTRL, val);
322 val = s5pcsis_read(state, S5PCSIS_DPHYCTRL);
323 val &= ~S5PCSIS_DPHYCTRL_ENABLE;
325 mask = (1 << (state->num_lanes + 1)) - 1;
326 val |= (mask & S5PCSIS_DPHYCTRL_ENABLE);
328 s5pcsis_write(state, S5PCSIS_DPHYCTRL, val);
331 /* Called with the state.lock mutex held */
332 static void __s5pcsis_set_format(struct csis_state *state)
334 struct v4l2_mbus_framefmt *mf = &state->format;
337 v4l2_dbg(1, debug, &state->sd, "fmt: %#x, %d x %d\n",
338 mf->code, mf->width, mf->height);
341 val = s5pcsis_read(state, S5PCSIS_CONFIG);
342 val = (val & ~S5PCSIS_CFG_FMT_MASK) | state->csis_fmt->fmt_reg;
343 s5pcsis_write(state, S5PCSIS_CONFIG, val);
345 /* Pixel resolution */
346 val = (mf->width << 16) | mf->height;
347 s5pcsis_write(state, S5PCSIS_RESOL, val);
350 static void s5pcsis_set_hsync_settle(struct csis_state *state, int settle)
352 u32 val = s5pcsis_read(state, S5PCSIS_DPHYCTRL);
354 val = (val & ~S5PCSIS_DPHYCTRL_HSS_MASK) | (settle << 27);
355 s5pcsis_write(state, S5PCSIS_DPHYCTRL, val);
358 static void s5pcsis_set_params(struct csis_state *state)
362 val = s5pcsis_read(state, S5PCSIS_CONFIG);
363 val = (val & ~S5PCSIS_CFG_NR_LANE_MASK) | (state->num_lanes - 1);
364 s5pcsis_write(state, S5PCSIS_CONFIG, val);
366 __s5pcsis_set_format(state);
367 s5pcsis_set_hsync_settle(state, state->hs_settle);
369 val = s5pcsis_read(state, S5PCSIS_CTRL);
370 if (state->csis_fmt->data_alignment == 32)
371 val |= S5PCSIS_CTRL_ALIGN_32BIT;
373 val &= ~S5PCSIS_CTRL_ALIGN_32BIT;
375 val &= ~S5PCSIS_CTRL_WCLK_EXTCLK;
377 val |= S5PCSIS_CTRL_WCLK_EXTCLK;
378 s5pcsis_write(state, S5PCSIS_CTRL, val);
380 /* Update the shadow register. */
381 val = s5pcsis_read(state, S5PCSIS_CTRL);
382 s5pcsis_write(state, S5PCSIS_CTRL, val | S5PCSIS_CTRL_UPDATE_SHADOW);
385 static void s5pcsis_clk_put(struct csis_state *state)
389 for (i = 0; i < NUM_CSIS_CLOCKS; i++) {
390 if (IS_ERR(state->clock[i]))
392 clk_unprepare(state->clock[i]);
393 clk_put(state->clock[i]);
394 state->clock[i] = ERR_PTR(-EINVAL);
398 static int s5pcsis_clk_get(struct csis_state *state)
400 struct device *dev = &state->pdev->dev;
403 for (i = 0; i < NUM_CSIS_CLOCKS; i++)
404 state->clock[i] = ERR_PTR(-EINVAL);
406 for (i = 0; i < NUM_CSIS_CLOCKS; i++) {
407 state->clock[i] = clk_get(dev, csi_clock_name[i]);
408 if (IS_ERR(state->clock[i])) {
409 ret = PTR_ERR(state->clock[i]);
412 ret = clk_prepare(state->clock[i]);
414 clk_put(state->clock[i]);
415 state->clock[i] = ERR_PTR(-EINVAL);
421 s5pcsis_clk_put(state);
422 dev_err(dev, "failed to get clock: %s\n", csi_clock_name[i]);
426 static void dump_regs(struct csis_state *state, const char *label)
430 const char * const name;
433 { 0x04, "DPHYCTRL" },
438 { 0x38, "SDW_CONFIG" },
442 v4l2_info(&state->sd, "--- %s ---\n", label);
444 for (i = 0; i < ARRAY_SIZE(registers); i++) {
445 u32 cfg = s5pcsis_read(state, registers[i].offset);
446 v4l2_info(&state->sd, "%10s: 0x%08x\n", registers[i].name, cfg);
450 static void s5pcsis_start_stream(struct csis_state *state)
452 s5pcsis_reset(state);
453 s5pcsis_set_params(state);
454 s5pcsis_system_enable(state, true);
455 s5pcsis_enable_interrupts(state, true);
458 static void s5pcsis_stop_stream(struct csis_state *state)
460 s5pcsis_enable_interrupts(state, false);
461 s5pcsis_system_enable(state, false);
464 static void s5pcsis_clear_counters(struct csis_state *state)
469 spin_lock_irqsave(&state->slock, flags);
470 for (i = 0; i < S5PCSIS_NUM_EVENTS; i++)
471 state->events[i].counter = 0;
472 spin_unlock_irqrestore(&state->slock, flags);
475 static void s5pcsis_log_counters(struct csis_state *state, bool non_errors)
477 int i = non_errors ? S5PCSIS_NUM_EVENTS : S5PCSIS_NUM_EVENTS - 4;
480 spin_lock_irqsave(&state->slock, flags);
482 for (i--; i >= 0; i--) {
483 if (state->events[i].counter > 0 || debug)
484 v4l2_info(&state->sd, "%s events: %d\n",
485 state->events[i].name,
486 state->events[i].counter);
488 spin_unlock_irqrestore(&state->slock, flags);
492 * V4L2 subdev operations
494 static int s5pcsis_s_power(struct v4l2_subdev *sd, int on)
496 struct csis_state *state = sd_to_csis_state(sd);
497 struct device *dev = &state->pdev->dev;
500 return pm_runtime_get_sync(dev);
502 return pm_runtime_put_sync(dev);
505 static int s5pcsis_s_stream(struct v4l2_subdev *sd, int enable)
507 struct csis_state *state = sd_to_csis_state(sd);
510 v4l2_dbg(1, debug, sd, "%s: %d, state: 0x%x\n",
511 __func__, enable, state->flags);
514 s5pcsis_clear_counters(state);
515 ret = pm_runtime_get_sync(&state->pdev->dev);
520 mutex_lock(&state->lock);
522 if (state->flags & ST_SUSPENDED) {
526 s5pcsis_start_stream(state);
527 state->flags |= ST_STREAMING;
529 s5pcsis_stop_stream(state);
530 state->flags &= ~ST_STREAMING;
532 s5pcsis_log_counters(state, true);
535 mutex_unlock(&state->lock);
537 pm_runtime_put(&state->pdev->dev);
539 return ret == 1 ? 0 : ret;
542 static int s5pcsis_enum_mbus_code(struct v4l2_subdev *sd,
543 struct v4l2_subdev_fh *fh,
544 struct v4l2_subdev_mbus_code_enum *code)
546 if (code->index >= ARRAY_SIZE(s5pcsis_formats))
549 code->code = s5pcsis_formats[code->index].code;
553 static struct csis_pix_format const *s5pcsis_try_format(
554 struct v4l2_mbus_framefmt *mf)
556 struct csis_pix_format const *csis_fmt;
558 csis_fmt = find_csis_format(mf);
559 if (csis_fmt == NULL)
560 csis_fmt = &s5pcsis_formats[0];
562 mf->code = csis_fmt->code;
563 v4l_bound_align_image(&mf->width, 1, CSIS_MAX_PIX_WIDTH,
564 csis_fmt->pix_width_alignment,
565 &mf->height, 1, CSIS_MAX_PIX_HEIGHT, 1,
570 static struct v4l2_mbus_framefmt *__s5pcsis_get_format(
571 struct csis_state *state, struct v4l2_subdev_fh *fh,
572 enum v4l2_subdev_format_whence which)
574 if (which == V4L2_SUBDEV_FORMAT_TRY)
575 return fh ? v4l2_subdev_get_try_format(fh, 0) : NULL;
577 return &state->format;
580 static int s5pcsis_set_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
581 struct v4l2_subdev_format *fmt)
583 struct csis_state *state = sd_to_csis_state(sd);
584 struct csis_pix_format const *csis_fmt;
585 struct v4l2_mbus_framefmt *mf;
587 mf = __s5pcsis_get_format(state, fh, fmt->which);
589 if (fmt->pad == CSIS_PAD_SOURCE) {
591 mutex_lock(&state->lock);
593 mutex_unlock(&state->lock);
597 csis_fmt = s5pcsis_try_format(&fmt->format);
599 mutex_lock(&state->lock);
601 if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE)
602 state->csis_fmt = csis_fmt;
603 mutex_unlock(&state->lock);
608 static int s5pcsis_get_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
609 struct v4l2_subdev_format *fmt)
611 struct csis_state *state = sd_to_csis_state(sd);
612 struct v4l2_mbus_framefmt *mf;
614 mf = __s5pcsis_get_format(state, fh, fmt->which);
618 mutex_lock(&state->lock);
620 mutex_unlock(&state->lock);
624 static int s5pcsis_s_rx_buffer(struct v4l2_subdev *sd, void *buf,
627 struct csis_state *state = sd_to_csis_state(sd);
630 *size = min_t(unsigned int, *size, S5PCSIS_PKTDATA_SIZE);
632 spin_lock_irqsave(&state->slock, flags);
633 state->pkt_buf.data = buf;
634 state->pkt_buf.len = *size;
635 spin_unlock_irqrestore(&state->slock, flags);
640 static int s5pcsis_log_status(struct v4l2_subdev *sd)
642 struct csis_state *state = sd_to_csis_state(sd);
644 mutex_lock(&state->lock);
645 s5pcsis_log_counters(state, true);
646 if (debug && (state->flags & ST_POWERED))
647 dump_regs(state, __func__);
648 mutex_unlock(&state->lock);
652 static int s5pcsis_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
654 struct v4l2_mbus_framefmt *format = v4l2_subdev_get_try_format(fh, 0);
656 format->colorspace = V4L2_COLORSPACE_JPEG;
657 format->code = s5pcsis_formats[0].code;
658 format->width = S5PCSIS_DEF_PIX_WIDTH;
659 format->height = S5PCSIS_DEF_PIX_HEIGHT;
660 format->field = V4L2_FIELD_NONE;
665 static const struct v4l2_subdev_internal_ops s5pcsis_sd_internal_ops = {
666 .open = s5pcsis_open,
669 static struct v4l2_subdev_core_ops s5pcsis_core_ops = {
670 .s_power = s5pcsis_s_power,
671 .log_status = s5pcsis_log_status,
674 static struct v4l2_subdev_pad_ops s5pcsis_pad_ops = {
675 .enum_mbus_code = s5pcsis_enum_mbus_code,
676 .get_fmt = s5pcsis_get_fmt,
677 .set_fmt = s5pcsis_set_fmt,
680 static struct v4l2_subdev_video_ops s5pcsis_video_ops = {
681 .s_rx_buffer = s5pcsis_s_rx_buffer,
682 .s_stream = s5pcsis_s_stream,
685 static struct v4l2_subdev_ops s5pcsis_subdev_ops = {
686 .core = &s5pcsis_core_ops,
687 .pad = &s5pcsis_pad_ops,
688 .video = &s5pcsis_video_ops,
691 static irqreturn_t s5pcsis_irq_handler(int irq, void *dev_id)
693 struct csis_state *state = dev_id;
694 struct csis_pktbuf *pktbuf = &state->pkt_buf;
698 status = s5pcsis_read(state, S5PCSIS_INTSRC);
699 spin_lock_irqsave(&state->slock, flags);
701 if ((status & S5PCSIS_INTSRC_NON_IMAGE_DATA) && pktbuf->data) {
704 if (status & S5PCSIS_INTSRC_EVEN)
705 offset = S5PCSIS_PKTDATA_EVEN;
707 offset = S5PCSIS_PKTDATA_ODD;
709 memcpy(pktbuf->data, state->regs + offset, pktbuf->len);
714 /* Update the event/error counters */
715 if ((status & S5PCSIS_INTSRC_ERRORS) || debug) {
717 for (i = 0; i < S5PCSIS_NUM_EVENTS; i++) {
718 if (!(status & state->events[i].mask))
720 state->events[i].counter++;
721 v4l2_dbg(2, debug, &state->sd, "%s: %d\n",
722 state->events[i].name,
723 state->events[i].counter);
725 v4l2_dbg(2, debug, &state->sd, "status: %08x\n", status);
727 spin_unlock_irqrestore(&state->slock, flags);
729 s5pcsis_write(state, S5PCSIS_INTSRC, status);
733 static int s5pcsis_get_platform_data(struct platform_device *pdev,
734 struct csis_state *state)
736 struct s5p_platform_mipi_csis *pdata = pdev->dev.platform_data;
739 dev_err(&pdev->dev, "Platform data not specified\n");
743 state->clk_frequency = pdata->clk_rate;
744 state->num_lanes = pdata->lanes;
745 state->hs_settle = pdata->hs_settle;
746 state->index = max(0, pdev->id);
747 state->max_num_lanes = state->index ? CSIS1_MAX_LANES :
753 static int s5pcsis_parse_dt(struct platform_device *pdev,
754 struct csis_state *state)
756 struct device_node *node = pdev->dev.of_node;
757 struct v4l2_of_endpoint endpoint;
759 if (of_property_read_u32(node, "clock-frequency",
760 &state->clk_frequency))
761 state->clk_frequency = DEFAULT_SCLK_CSIS_FREQ;
762 if (of_property_read_u32(node, "bus-width",
763 &state->max_num_lanes))
766 node = of_graph_get_next_endpoint(node, NULL);
768 dev_err(&pdev->dev, "No port node at %s\n",
769 pdev->dev.of_node->full_name);
772 /* Get port node and validate MIPI-CSI channel id. */
773 v4l2_of_parse_endpoint(node, &endpoint);
775 state->index = endpoint.base.port - FIMC_INPUT_MIPI_CSI2_0;
776 if (state->index < 0 || state->index >= CSIS_MAX_ENTITIES)
779 /* Get MIPI CSI-2 bus configration from the endpoint node. */
780 of_property_read_u32(node, "samsung,csis-hs-settle",
782 state->wclk_ext = of_property_read_bool(node,
783 "samsung,csis-wclk");
785 state->num_lanes = endpoint.bus.mipi_csi2.num_data_lanes;
791 #define s5pcsis_parse_dt(pdev, state) (-ENOSYS)
794 static int s5pcsis_pm_resume(struct device *dev, bool runtime);
795 static const struct of_device_id s5pcsis_of_match[];
797 static int s5pcsis_probe(struct platform_device *pdev)
799 const struct of_device_id *of_id;
800 const struct csis_drvdata *drv_data;
801 struct device *dev = &pdev->dev;
802 struct resource *mem_res;
803 struct csis_state *state;
807 state = devm_kzalloc(dev, sizeof(*state), GFP_KERNEL);
811 mutex_init(&state->lock);
812 spin_lock_init(&state->slock);
816 of_id = of_match_node(s5pcsis_of_match, dev->of_node);
817 if (WARN_ON(of_id == NULL))
820 drv_data = of_id->data;
821 state->interrupt_mask = drv_data->interrupt_mask;
823 ret = s5pcsis_parse_dt(pdev, state);
825 ret = s5pcsis_get_platform_data(pdev, state);
831 if (state->num_lanes == 0 || state->num_lanes > state->max_num_lanes) {
832 dev_err(dev, "Unsupported number of data lanes: %d (max. %d)\n",
833 state->num_lanes, state->max_num_lanes);
837 state->phy = devm_phy_get(dev, "csis");
838 if (IS_ERR(state->phy))
839 return PTR_ERR(state->phy);
841 mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
842 state->regs = devm_ioremap_resource(dev, mem_res);
843 if (IS_ERR(state->regs))
844 return PTR_ERR(state->regs);
846 state->irq = platform_get_irq(pdev, 0);
847 if (state->irq < 0) {
848 dev_err(dev, "Failed to get irq\n");
852 for (i = 0; i < CSIS_NUM_SUPPLIES; i++)
853 state->supplies[i].supply = csis_supply_name[i];
855 ret = devm_regulator_bulk_get(dev, CSIS_NUM_SUPPLIES,
860 ret = s5pcsis_clk_get(state);
864 if (state->clk_frequency)
865 ret = clk_set_rate(state->clock[CSIS_CLK_MUX],
866 state->clk_frequency);
868 dev_WARN(dev, "No clock frequency specified!\n");
872 ret = clk_enable(state->clock[CSIS_CLK_MUX]);
876 ret = devm_request_irq(dev, state->irq, s5pcsis_irq_handler,
877 0, dev_name(dev), state);
879 dev_err(dev, "Interrupt request failed\n");
883 v4l2_subdev_init(&state->sd, &s5pcsis_subdev_ops);
884 state->sd.owner = THIS_MODULE;
885 snprintf(state->sd.name, sizeof(state->sd.name), "%s.%d",
886 CSIS_SUBDEV_NAME, state->index);
887 state->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
888 state->csis_fmt = &s5pcsis_formats[0];
890 state->format.code = s5pcsis_formats[0].code;
891 state->format.width = S5PCSIS_DEF_PIX_WIDTH;
892 state->format.height = S5PCSIS_DEF_PIX_HEIGHT;
894 state->pads[CSIS_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
895 state->pads[CSIS_PAD_SOURCE].flags = MEDIA_PAD_FL_SOURCE;
896 ret = media_entity_init(&state->sd.entity,
897 CSIS_PADS_NUM, state->pads, 0);
901 /* This allows to retrieve the platform device id by the host driver */
902 v4l2_set_subdevdata(&state->sd, pdev);
904 /* .. and a pointer to the subdev. */
905 platform_set_drvdata(pdev, &state->sd);
906 memcpy(state->events, s5pcsis_events, sizeof(state->events));
908 pm_runtime_enable(dev);
909 if (!pm_runtime_enabled(dev)) {
910 ret = s5pcsis_pm_resume(dev, true);
915 dev_info(&pdev->dev, "lanes: %d, hs_settle: %d, wclk: %d, freq: %u\n",
916 state->num_lanes, state->hs_settle, state->wclk_ext,
917 state->clk_frequency);
921 media_entity_cleanup(&state->sd.entity);
923 clk_disable(state->clock[CSIS_CLK_MUX]);
925 s5pcsis_clk_put(state);
929 static int s5pcsis_pm_suspend(struct device *dev, bool runtime)
931 struct platform_device *pdev = to_platform_device(dev);
932 struct v4l2_subdev *sd = platform_get_drvdata(pdev);
933 struct csis_state *state = sd_to_csis_state(sd);
936 v4l2_dbg(1, debug, sd, "%s: flags: 0x%x\n",
937 __func__, state->flags);
939 mutex_lock(&state->lock);
940 if (state->flags & ST_POWERED) {
941 s5pcsis_stop_stream(state);
942 ret = phy_power_off(state->phy);
945 ret = regulator_bulk_disable(CSIS_NUM_SUPPLIES,
949 clk_disable(state->clock[CSIS_CLK_GATE]);
950 state->flags &= ~ST_POWERED;
952 state->flags |= ST_SUSPENDED;
955 mutex_unlock(&state->lock);
956 return ret ? -EAGAIN : 0;
959 static int s5pcsis_pm_resume(struct device *dev, bool runtime)
961 struct platform_device *pdev = to_platform_device(dev);
962 struct v4l2_subdev *sd = platform_get_drvdata(pdev);
963 struct csis_state *state = sd_to_csis_state(sd);
966 v4l2_dbg(1, debug, sd, "%s: flags: 0x%x\n",
967 __func__, state->flags);
969 mutex_lock(&state->lock);
970 if (!runtime && !(state->flags & ST_SUSPENDED))
973 if (!(state->flags & ST_POWERED)) {
974 ret = regulator_bulk_enable(CSIS_NUM_SUPPLIES,
978 ret = phy_power_on(state->phy);
980 state->flags |= ST_POWERED;
982 regulator_bulk_disable(CSIS_NUM_SUPPLIES,
986 clk_enable(state->clock[CSIS_CLK_GATE]);
988 if (state->flags & ST_STREAMING)
989 s5pcsis_start_stream(state);
991 state->flags &= ~ST_SUSPENDED;
993 mutex_unlock(&state->lock);
994 return ret ? -EAGAIN : 0;
997 #ifdef CONFIG_PM_SLEEP
998 static int s5pcsis_suspend(struct device *dev)
1000 return s5pcsis_pm_suspend(dev, false);
1003 static int s5pcsis_resume(struct device *dev)
1005 return s5pcsis_pm_resume(dev, false);
1009 #ifdef CONFIG_PM_RUNTIME
1010 static int s5pcsis_runtime_suspend(struct device *dev)
1012 return s5pcsis_pm_suspend(dev, true);
1015 static int s5pcsis_runtime_resume(struct device *dev)
1017 return s5pcsis_pm_resume(dev, true);
1021 static int s5pcsis_remove(struct platform_device *pdev)
1023 struct v4l2_subdev *sd = platform_get_drvdata(pdev);
1024 struct csis_state *state = sd_to_csis_state(sd);
1026 pm_runtime_disable(&pdev->dev);
1027 s5pcsis_pm_suspend(&pdev->dev, true);
1028 clk_disable(state->clock[CSIS_CLK_MUX]);
1029 pm_runtime_set_suspended(&pdev->dev);
1030 s5pcsis_clk_put(state);
1032 media_entity_cleanup(&state->sd.entity);
1037 static const struct dev_pm_ops s5pcsis_pm_ops = {
1038 SET_RUNTIME_PM_OPS(s5pcsis_runtime_suspend, s5pcsis_runtime_resume,
1040 SET_SYSTEM_SLEEP_PM_OPS(s5pcsis_suspend, s5pcsis_resume)
1043 static const struct csis_drvdata exynos4_csis_drvdata = {
1044 .interrupt_mask = S5PCSIS_INTMSK_EXYNOS4_EN_ALL,
1047 static const struct csis_drvdata exynos5_csis_drvdata = {
1048 .interrupt_mask = S5PCSIS_INTMSK_EXYNOS5_EN_ALL,
1051 static const struct of_device_id s5pcsis_of_match[] = {
1053 .compatible = "samsung,s5pv210-csis",
1054 .data = &exynos4_csis_drvdata,
1056 .compatible = "samsung,exynos4210-csis",
1057 .data = &exynos4_csis_drvdata,
1059 .compatible = "samsung,exynos5250-csis",
1060 .data = &exynos5_csis_drvdata,
1064 MODULE_DEVICE_TABLE(of, s5pcsis_of_match);
1066 static struct platform_driver s5pcsis_driver = {
1067 .probe = s5pcsis_probe,
1068 .remove = s5pcsis_remove,
1070 .of_match_table = s5pcsis_of_match,
1071 .name = CSIS_DRIVER_NAME,
1072 .owner = THIS_MODULE,
1073 .pm = &s5pcsis_pm_ops,
1077 module_platform_driver(s5pcsis_driver);
1079 MODULE_AUTHOR("Sylwester Nawrocki <s.nawrocki@samsung.com>");
1080 MODULE_DESCRIPTION("Samsung S5P/EXYNOS SoC MIPI-CSI2 receiver driver");
1081 MODULE_LICENSE("GPL");