summaryrefslogtreecommitdiffstats
path: root/drivers/phy/phy-exynos-mipi-video.c
blob: cc093ebfda9435a28ec627ca1f022b877c42b342 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
/*
 * Samsung S5P/EXYNOS SoC series MIPI CSIS/DSIM DPHY driver
 *
 * Copyright (C) 2013,2016 Samsung Electronics Co., Ltd.
 * Author: Sylwester Nawrocki <s.nawrocki@samsung.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/err.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/mfd/syscon/exynos4-pmu.h>
#include <linux/mfd/syscon/exynos5-pmu.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_device.h>
#include <linux/phy/phy.h>
#include <linux/regmap.h>
#include <linux/spinlock.h>
#include <linux/mfd/syscon.h>

enum exynos_mipi_phy_id {
	EXYNOS_MIPI_PHY_ID_NONE = -1,
	EXYNOS_MIPI_PHY_ID_CSIS0,
	EXYNOS_MIPI_PHY_ID_DSIM0,
	EXYNOS_MIPI_PHY_ID_CSIS1,
	EXYNOS_MIPI_PHY_ID_DSIM1,
	EXYNOS_MIPI_PHY_ID_CSIS2,
	EXYNOS_MIPI_PHYS_NUM
};

enum exynos_mipi_phy_regmap_id {
	EXYNOS_MIPI_REGMAP_PMU,
	EXYNOS_MIPI_REGMAP_DISP,
	EXYNOS_MIPI_REGMAP_CAM0,
	EXYNOS_MIPI_REGMAP_CAM1,
	EXYNOS_MIPI_REGMAPS_NUM
};

struct mipi_phy_device_desc {
	int num_phys;
	int num_regmaps;
	const char *regmap_names[EXYNOS_MIPI_REGMAPS_NUM];
	struct exynos_mipi_phy_desc {
		enum exynos_mipi_phy_id	coupled_phy_id;
		u32 enable_val;
		unsigned int enable_reg;
		enum exynos_mipi_phy_regmap_id enable_map;
		u32 resetn_val;
		unsigned int resetn_reg;
		enum exynos_mipi_phy_regmap_id resetn_map;
	} phys[EXYNOS_MIPI_PHYS_NUM];
};

static const struct mipi_phy_device_desc s5pv210_mipi_phy = {
	.num_regmaps = 1,
	.regmap_names = {"syscon"},
	.num_phys = 4,
	.phys = {
		{
			/* EXYNOS_MIPI_PHY_ID_CSIS0 */
			.coupled_phy_id = EXYNOS_MIPI_PHY_ID_DSIM0,
			.enable_val = EXYNOS4_MIPI_PHY_ENABLE,
			.enable_reg = EXYNOS4_MIPI_PHY_CONTROL(0),
			.enable_map = EXYNOS_MIPI_REGMAP_PMU,
			.resetn_val = EXYNOS4_MIPI_PHY_SRESETN,
			.resetn_reg = EXYNOS4_MIPI_PHY_CONTROL(0),
			.resetn_map = EXYNOS_MIPI_REGMAP_PMU,
		}, {
			/* EXYNOS_MIPI_PHY_ID_DSIM0 */
			.coupled_phy_id = EXYNOS_MIPI_PHY_ID_CSIS0,
			.enable_val = EXYNOS4_MIPI_PHY_ENABLE,
			.enable_reg = EXYNOS4_MIPI_PHY_CONTROL(0),
			.enable_map = EXYNOS_MIPI_REGMAP_PMU,
			.resetn_val = EXYNOS4_MIPI_PHY_MRESETN,
			.resetn_reg = EXYNOS4_MIPI_PHY_CONTROL(0),
			.resetn_map = EXYNOS_MIPI_REGMAP_PMU,
		}, {
			/* EXYNOS_MIPI_PHY_ID_CSIS1 */
			.coupled_phy_id = EXYNOS_MIPI_PHY_ID_DSIM1,
			.enable_val = EXYNOS4_MIPI_PHY_ENABLE,
			.enable_reg = EXYNOS4_MIPI_PHY_CONTROL(1),
			.enable_map = EXYNOS_MIPI_REGMAP_PMU,
			.resetn_val = EXYNOS4_MIPI_PHY_SRESETN,
			.resetn_reg = EXYNOS4_MIPI_PHY_CONTROL(1),
			.resetn_map = EXYNOS_MIPI_REGMAP_PMU,
		}, {
			/* EXYNOS_MIPI_PHY_ID_DSIM1 */
			.coupled_phy_id = EXYNOS_MIPI_PHY_ID_CSIS1,
			.enable_val = EXYNOS4_MIPI_PHY_ENABLE,
			.enable_reg = EXYNOS4_MIPI_PHY_CONTROL(1),
			.enable_map = EXYNOS_MIPI_REGMAP_PMU,
			.resetn_val = EXYNOS4_MIPI_PHY_MRESETN,
			.resetn_reg = EXYNOS4_MIPI_PHY_CONTROL(1),
			.resetn_map = EXYNOS_MIPI_REGMAP_PMU,
		},
	},
};

static const struct mipi_phy_device_desc exynos5420_mipi_phy = {
	.num_regmaps = 1,
	.regmap_names = {"syscon"},
	.num_phys = 5,
	.phys = {
		{
			/* EXYNOS_MIPI_PHY_ID_CSIS0 */
			.coupled_phy_id = EXYNOS_MIPI_PHY_ID_DSIM0,
			.enable_val = EXYNOS5_PHY_ENABLE,
			.enable_reg = EXYNOS5420_MIPI_PHY0_CONTROL,
			.enable_map = EXYNOS_MIPI_REGMAP_PMU,
			.resetn_val = EXYNOS5_MIPI_PHY_S_RESETN,
			.resetn_reg = EXYNOS5420_MIPI_PHY0_CONTROL,
			.resetn_map = EXYNOS_MIPI_REGMAP_PMU,
		}, {
			/* EXYNOS_MIPI_PHY_ID_DSIM0 */
			.coupled_phy_id = EXYNOS_MIPI_PHY_ID_CSIS0,
			.enable_val = EXYNOS5_PHY_ENABLE,
			.enable_reg = EXYNOS5420_MIPI_PHY0_CONTROL,
			.enable_map = EXYNOS_MIPI_REGMAP_PMU,
			.resetn_val = EXYNOS5_MIPI_PHY_M_RESETN,
			.resetn_reg = EXYNOS5420_MIPI_PHY0_CONTROL,
			.resetn_map = EXYNOS_MIPI_REGMAP_PMU,
		}, {
			/* EXYNOS_MIPI_PHY_ID_CSIS1 */
			.coupled_phy_id = EXYNOS_MIPI_PHY_ID_DSIM1,
			.enable_val = EXYNOS5_PHY_ENABLE,
			.enable_reg = EXYNOS5420_MIPI_PHY1_CONTROL,
			.enable_map = EXYNOS_MIPI_REGMAP_PMU,
			.resetn_val = EXYNOS5_MIPI_PHY_S_RESETN,
			.resetn_reg = EXYNOS5420_MIPI_PHY1_CONTROL,
			.resetn_map = EXYNOS_MIPI_REGMAP_PMU,
		}, {
			/* EXYNOS_MIPI_PHY_ID_DSIM1 */
			.coupled_phy_id = EXYNOS_MIPI_PHY_ID_CSIS1,
			.enable_val = EXYNOS5_PHY_ENABLE,
			.enable_reg = EXYNOS5420_MIPI_PHY1_CONTROL,
			.enable_map = EXYNOS_MIPI_REGMAP_PMU,
			.resetn_val = EXYNOS5_MIPI_PHY_M_RESETN,
			.resetn_reg = EXYNOS5420_MIPI_PHY1_CONTROL,
			.resetn_map = EXYNOS_MIPI_REGMAP_PMU,
		}, {
			/* EXYNOS_MIPI_PHY_ID_CSIS2 */
			.coupled_phy_id = EXYNOS_MIPI_PHY_ID_NONE,
			.enable_val = EXYNOS5_PHY_ENABLE,
			.enable_reg = EXYNOS5420_MIPI_PHY2_CONTROL,
			.enable_map = EXYNOS_MIPI_REGMAP_PMU,
			.resetn_val = EXYNOS5_MIPI_PHY_S_RESETN,
			.resetn_reg = EXYNOS5420_MIPI_PHY2_CONTROL,
			.resetn_map = EXYNOS_MIPI_REGMAP_PMU,
		},
	},
};

#define EXYNOS5433_SYSREG_DISP_MIPI_PHY		0x100C
#define EXYNOS5433_SYSREG_CAM0_MIPI_DPHY_CON	0x1014
#define EXYNOS5433_SYSREG_CAM1_MIPI_DPHY_CON	0x1020

static const struct mipi_phy_device_desc exynos5433_mipi_phy = {
	.num_regmaps = 4,
	.regmap_names = {
		"samsung,pmu-syscon",
		"samsung,disp-sysreg",
		"samsung,cam0-sysreg",
		"samsung,cam1-sysreg"
	},
	.num_phys = 5,
	.phys = {
		{
			/* EXYNOS_MIPI_PHY_ID_CSIS0 */
			.coupled_phy_id = EXYNOS_MIPI_PHY_ID_DSIM0,
			.enable_val = EXYNOS5_PHY_ENABLE,
			.enable_reg = EXYNOS5433_MIPI_PHY0_CONTROL,
			.enable_map = EXYNOS_MIPI_REGMAP_PMU,
			.resetn_val = BIT(0),
			.resetn_reg = EXYNOS5433_SYSREG_CAM0_MIPI_DPHY_CON,
			.resetn_map = EXYNOS_MIPI_REGMAP_CAM0,
		}, {
			/* EXYNOS_MIPI_PHY_ID_DSIM0 */
			.coupled_phy_id = EXYNOS_MIPI_PHY_ID_CSIS0,
			.enable_val = EXYNOS5_PHY_ENABLE,
			.enable_reg = EXYNOS5433_MIPI_PHY0_CONTROL,
			.enable_map = EXYNOS_MIPI_REGMAP_PMU,
			.resetn_val = BIT(0),
			.resetn_reg = EXYNOS5433_SYSREG_DISP_MIPI_PHY,
			.resetn_map = EXYNOS_MIPI_REGMAP_DISP,
		}, {
			/* EXYNOS_MIPI_PHY_ID_CSIS1 */
			.coupled_phy_id = EXYNOS_MIPI_PHY_ID_NONE,
			.enable_val = EXYNOS5_PHY_ENABLE,
			.enable_reg = EXYNOS5433_MIPI_PHY1_CONTROL,
			.enable_map = EXYNOS_MIPI_REGMAP_PMU,
			.resetn_val = BIT(1),
			.resetn_reg = EXYNOS5433_SYSREG_CAM0_MIPI_DPHY_CON,
			.resetn_map = EXYNOS_MIPI_REGMAP_CAM0,
		}, {
			/* EXYNOS_MIPI_PHY_ID_DSIM1 */
			.coupled_phy_id = EXYNOS_MIPI_PHY_ID_NONE,
			.enable_val = EXYNOS5_PHY_ENABLE,
			.enable_reg = EXYNOS5433_MIPI_PHY1_CONTROL,
			.enable_map = EXYNOS_MIPI_REGMAP_PMU,
			.resetn_val = BIT(1),
			.resetn_reg = EXYNOS5433_SYSREG_DISP_MIPI_PHY,
			.resetn_map = EXYNOS_MIPI_REGMAP_DISP,
		}, {
			/* EXYNOS_MIPI_PHY_ID_CSIS2 */
			.coupled_phy_id = EXYNOS_MIPI_PHY_ID_NONE,
			.enable_val = EXYNOS5_PHY_ENABLE,
			.enable_reg = EXYNOS5433_MIPI_PHY2_CONTROL,
			.enable_map = EXYNOS_MIPI_REGMAP_PMU,
			.resetn_val = BIT(0),
			.resetn_reg = EXYNOS5433_SYSREG_CAM1_MIPI_DPHY_CON,
			.resetn_map = EXYNOS_MIPI_REGMAP_CAM1,
		},
	},
};

struct exynos_mipi_video_phy {
	struct regmap *regmaps[EXYNOS_MIPI_REGMAPS_NUM];
	int num_phys;
	struct video_phy_desc {
		struct phy *phy;
		unsigned int index;
		const struct exynos_mipi_phy_desc *data;
	} phys[EXYNOS_MIPI_PHYS_NUM];
	spinlock_t slock;
};

static inline int __is_running(const struct exynos_mipi_phy_desc *data,
			struct exynos_mipi_video_phy *state)
{
	u32 val;

	regmap_read(state->regmaps[data->resetn_map], data->resetn_reg, &val);
	return val & data->resetn_val;
}

static int __set_phy_state(const struct exynos_mipi_phy_desc *data,
			   struct exynos_mipi_video_phy *state, unsigned int on)
{
	u32 val;

	spin_lock(&state->slock);

	/* disable in PMU sysreg */
	if (!on && data->coupled_phy_id >= 0 &&
	    !__is_running(state->phys[data->coupled_phy_id].data, state)) {
		regmap_read(state->regmaps[data->enable_map], data->enable_reg,
			    &val);
		val &= ~data->enable_val;
		regmap_write(state->regmaps[data->enable_map], data->enable_reg,
			     val);
	}

	/* PHY reset */
	regmap_read(state->regmaps[data->resetn_map], data->resetn_reg, &val);
	val = on ? (val | data->resetn_val) : (val & ~data->resetn_val);
	regmap_write(state->regmaps[data->resetn_map], data->resetn_reg, val);

	/* enable in PMU sysreg */
	if (on) {
		regmap_read(state->regmaps[data->enable_map], data->enable_reg,
			    &val);
		val |= data->enable_val;
		regmap_write(state->regmaps[data->enable_map], data->enable_reg,
			     val);
	}

	spin_unlock(&state->slock);

	return 0;
}

#define to_mipi_video_phy(desc) \
	container_of((desc), struct exynos_mipi_video_phy, phys[(desc)->index])

static int exynos_mipi_video_phy_power_on(struct phy *phy)
{
	struct video_phy_desc *phy_desc = phy_get_drvdata(phy);
	struct exynos_mipi_video_phy *state = to_mipi_video_phy(phy_desc);

	return __set_phy_state(phy_desc->data, state, 1);
}

static int exynos_mipi_video_phy_power_off(struct phy *phy)
{
	struct video_phy_desc *phy_desc = phy_get_drvdata(phy);
	struct exynos_mipi_video_phy *state = to_mipi_video_phy(phy_desc);

	return __set_phy_state(phy_desc->data, state, 0);
}

static struct phy *exynos_mipi_video_phy_xlate(struct device *dev,
					struct of_phandle_args *args)
{
	struct exynos_mipi_video_phy *state = dev_get_drvdata(dev);

	if (WARN_ON(args->args[0] >= state->num_phys))
		return ERR_PTR(-ENODEV);

	return state->phys[args->args[0]].phy;
}

static const struct phy_ops exynos_mipi_video_phy_ops = {
	.power_on	= exynos_mipi_video_phy_power_on,
	.power_off	= exynos_mipi_video_phy_power_off,
	.owner		= THIS_MODULE,
};

static int exynos_mipi_video_phy_probe(struct platform_device *pdev)
{
	const struct mipi_phy_device_desc *phy_dev;
	struct exynos_mipi_video_phy *state;
	struct device *dev = &pdev->dev;
	struct device_node *np = dev->of_node;
	struct phy_provider *phy_provider;
	unsigned int i;

	phy_dev = of_device_get_match_data(dev);
	if (!phy_dev)
		return -ENODEV;

	state = devm_kzalloc(dev, sizeof(*state), GFP_KERNEL);
	if (!state)
		return -ENOMEM;

	for (i = 0; i < phy_dev->num_regmaps; i++) {
		state->regmaps[i] = syscon_regmap_lookup_by_phandle(np,
						phy_dev->regmap_names[i]);
		if (IS_ERR(state->regmaps[i]))
			return PTR_ERR(state->regmaps[i]);
	}
	state->num_phys = phy_dev->num_phys;
	spin_lock_init(&state->slock);

	dev_set_drvdata(dev, state);

	for (i = 0; i < state->num_phys; i++) {
		struct phy *phy = devm_phy_create(dev, NULL,
						  &exynos_mipi_video_phy_ops);
		if (IS_ERR(phy)) {
			dev_err(dev, "failed to create PHY %d\n", i);
			return PTR_ERR(phy);
		}

		state->phys[i].phy = phy;
		state->phys[i].index = i;
		state->phys[i].data = &phy_dev->phys[i];
		phy_set_drvdata(phy, &state->phys[i]);
	}

	phy_provider = devm_of_phy_provider_register(dev,
					exynos_mipi_video_phy_xlate);

	return PTR_ERR_OR_ZERO(phy_provider);
}

static const struct of_device_id exynos_mipi_video_phy_of_match[] = {
	{
		.compatible = "samsung,s5pv210-mipi-video-phy",
		.data = &s5pv210_mipi_phy,
	}, {
		.compatible = "samsung,exynos5420-mipi-video-phy",
		.data = &exynos5420_mipi_phy,
	}, {
		.compatible = "samsung,exynos5433-mipi-video-phy",
		.data = &exynos5433_mipi_phy,
	},
	{ /* sentinel */ },
};
MODULE_DEVICE_TABLE(of, exynos_mipi_video_phy_of_match);

static struct platform_driver exynos_mipi_video_phy_driver = {
	.probe	= exynos_mipi_video_phy_probe,
	.driver = {
		.of_match_table	= exynos_mipi_video_phy_of_match,
		.name  = "exynos-mipi-video-phy",
	}
};
module_platform_driver(exynos_mipi_video_phy_driver);

MODULE_DESCRIPTION("Samsung S5P/EXYNOS SoC MIPI CSI-2/DSI PHY driver");
MODULE_AUTHOR("Sylwester Nawrocki <s.nawrocki@samsung.com>");
MODULE_LICENSE("GPL v2");