summaryrefslogtreecommitdiffstats
path: root/drivers/mfd/arizona-spi.c
blob: 24a2c75d691a4e3c186ba2c840bdecfc3e1d0dd7 (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
// SPDX-License-Identifier: GPL-2.0-only
/*
 * arizona-spi.c  --  Arizona SPI bus interface
 *
 * Copyright 2012 Wolfson Microelectronics plc
 *
 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
 */

#include <linux/acpi.h>
#include <linux/err.h>
#include <linux/gpio/consumer.h>
#include <linux/gpio/machine.h>
#include <linux/module.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
#include <linux/spi/spi.h>
#include <linux/of.h>
#include <uapi/linux/input-event-codes.h>

#include <linux/mfd/arizona/core.h>

#include "arizona.h"

#ifdef CONFIG_ACPI
const struct acpi_gpio_params reset_gpios = { 1, 0, false };
const struct acpi_gpio_params ldoena_gpios = { 2, 0, false };

static const struct acpi_gpio_mapping arizona_acpi_gpios[] = {
	{ "reset-gpios", &reset_gpios, 1, },
	{ "wlf,ldoena-gpios", &ldoena_gpios, 1 },
	{ }
};

/*
 * The ACPI resources for the device only describe external GPIO-s. They do
 * not provide mappings for the GPIO-s coming from the Arizona codec itself.
 */
static const struct gpiod_lookup arizona_soc_gpios[] = {
	{ "arizona", 2, "wlf,spkvdd-ena", 0, GPIO_ACTIVE_HIGH },
	{ "arizona", 4, "wlf,micd-pol", 0, GPIO_ACTIVE_LOW },
};

/*
 * The AOSP 3.5 mm Headset: Accessory Specification gives the following values:
 * Function A Play/Pause:           0 ohm
 * Function D Voice assistant:    135 ohm
 * Function B Volume Up           240 ohm
 * Function C Volume Down         470 ohm
 * Minimum Mic DC resistance     1000 ohm
 * Minimum Ear speaker impedance   16 ohm
 * Note the first max value below must be less then the min. speaker impedance,
 * to allow CTIA/OMTP detection to work. The other max values are the closest
 * value from extcon-arizona.c:arizona_micd_levels halfway 2 button resistances.
 */
static const struct arizona_micd_range arizona_micd_aosp_ranges[] = {
	{ .max =  11, .key = KEY_PLAYPAUSE },
	{ .max = 186, .key = KEY_VOICECOMMAND },
	{ .max = 348, .key = KEY_VOLUMEUP },
	{ .max = 752, .key = KEY_VOLUMEDOWN },
};

static void arizona_spi_acpi_remove_lookup(void *lookup)
{
	gpiod_remove_lookup_table(lookup);
}

static int arizona_spi_acpi_probe(struct arizona *arizona)
{
	struct gpiod_lookup_table *lookup;
	acpi_status status;
	int ret;

	/* Add mappings for the 2 ACPI declared GPIOs used for reset and ldo-ena */
	devm_acpi_dev_add_driver_gpios(arizona->dev, arizona_acpi_gpios);

	/* Add lookups for the SoCs own GPIOs used for micdet-polarity and spkVDD-enable */
	lookup = devm_kzalloc(arizona->dev,
			      struct_size(lookup, table, ARRAY_SIZE(arizona_soc_gpios) + 1),
			      GFP_KERNEL);
	if (!lookup)
		return -ENOMEM;

	lookup->dev_id = dev_name(arizona->dev);
	memcpy(lookup->table, arizona_soc_gpios, sizeof(arizona_soc_gpios));

	gpiod_add_lookup_table(lookup);
	ret = devm_add_action_or_reset(arizona->dev, arizona_spi_acpi_remove_lookup, lookup);
	if (ret)
		return ret;

	/* Enable 32KHz clock from SoC to codec for jack-detect */
	status = acpi_evaluate_object(ACPI_HANDLE(arizona->dev), "CLKE", NULL, NULL);
	if (ACPI_FAILURE(status))
		dev_warn(arizona->dev, "Failed to enable 32KHz clk ACPI error %d\n", status);

	/*
	 * Some DSDTs wrongly declare the IRQ trigger-type as IRQF_TRIGGER_FALLING
	 * The IRQ line will stay low when a new IRQ event happens between reading
	 * the IRQ status flags and acknowledging them. When the IRQ line stays
	 * low like this the IRQ will never trigger again when its type is set
	 * to IRQF_TRIGGER_FALLING. Correct the IRQ trigger-type to fix this.
	 *
	 * Note theoretically it is possible that some boards are not capable
	 * of handling active low level interrupts. In that case setting the
	 * flag to IRQF_TRIGGER_FALLING would not be a bug (and we would need
	 * to work around this) but so far all known usages of IRQF_TRIGGER_FALLING
	 * are a bug in the board's DSDT.
	 */
	arizona->pdata.irq_flags = IRQF_TRIGGER_LOW;

	/* Wait 200 ms after jack insertion */
	arizona->pdata.micd_detect_debounce = 200;

	/* Use standard AOSP values for headset-button mappings */
	arizona->pdata.micd_ranges = arizona_micd_aosp_ranges;
	arizona->pdata.num_micd_ranges = ARRAY_SIZE(arizona_micd_aosp_ranges);

	return 0;
}

static const struct acpi_device_id arizona_acpi_match[] = {
	{
		.id = "WM510204",
		.driver_data = WM5102,
	},
	{
		.id = "WM510205",
		.driver_data = WM5102,
	},
	{ }
};
MODULE_DEVICE_TABLE(acpi, arizona_acpi_match);
#else
static int arizona_spi_acpi_probe(struct arizona *arizona)
{
	return -ENODEV;
}
#endif

static int arizona_spi_probe(struct spi_device *spi)
{
	const struct spi_device_id *id = spi_get_device_id(spi);
	const void *match_data;
	struct arizona *arizona;
	const struct regmap_config *regmap_config = NULL;
	unsigned long type = 0;
	int ret;

	match_data = device_get_match_data(&spi->dev);
	if (match_data)
		type = (unsigned long)match_data;
	else if (id)
		type = id->driver_data;

	switch (type) {
	case WM5102:
		if (IS_ENABLED(CONFIG_MFD_WM5102))
			regmap_config = &wm5102_spi_regmap;
		break;
	case WM5110:
	case WM8280:
		if (IS_ENABLED(CONFIG_MFD_WM5110))
			regmap_config = &wm5110_spi_regmap;
		break;
	case WM1831:
	case CS47L24:
		if (IS_ENABLED(CONFIG_MFD_CS47L24))
			regmap_config = &cs47l24_spi_regmap;
		break;
	default:
		dev_err(&spi->dev, "Unknown device type %ld\n", type);
		return -EINVAL;
	}

	if (!regmap_config) {
		dev_err(&spi->dev,
			"No kernel support for device type %ld\n", type);
		return -EINVAL;
	}

	arizona = devm_kzalloc(&spi->dev, sizeof(*arizona), GFP_KERNEL);
	if (arizona == NULL)
		return -ENOMEM;

	arizona->regmap = devm_regmap_init_spi(spi, regmap_config);
	if (IS_ERR(arizona->regmap)) {
		ret = PTR_ERR(arizona->regmap);
		dev_err(&spi->dev, "Failed to allocate register map: %d\n",
			ret);
		return ret;
	}

	arizona->type = type;
	arizona->dev = &spi->dev;
	arizona->irq = spi->irq;

	if (has_acpi_companion(&spi->dev)) {
		ret = arizona_spi_acpi_probe(arizona);
		if (ret)
			return ret;
	}

	return arizona_dev_init(arizona);
}

static int arizona_spi_remove(struct spi_device *spi)
{
	struct arizona *arizona = spi_get_drvdata(spi);

	arizona_dev_exit(arizona);

	return 0;
}

static const struct spi_device_id arizona_spi_ids[] = {
	{ "wm5102", WM5102 },
	{ "wm5110", WM5110 },
	{ "wm8280", WM8280 },
	{ "wm1831", WM1831 },
	{ "cs47l24", CS47L24 },
	{ },
};
MODULE_DEVICE_TABLE(spi, arizona_spi_ids);

static struct spi_driver arizona_spi_driver = {
	.driver = {
		.name	= "arizona",
		.pm	= &arizona_pm_ops,
		.of_match_table	= of_match_ptr(arizona_of_match),
		.acpi_match_table = ACPI_PTR(arizona_acpi_match),
	},
	.probe		= arizona_spi_probe,
	.remove		= arizona_spi_remove,
	.id_table	= arizona_spi_ids,
};

module_spi_driver(arizona_spi_driver);

MODULE_SOFTDEP("pre: arizona_ldo1");
MODULE_DESCRIPTION("Arizona SPI bus interface");
MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
MODULE_LICENSE("GPL");