]>
Commit | Line | Data |
---|---|---|
39503622 DH |
1 | /* |
2 | * Pistachio internal dac driver | |
3 | * | |
4 | * Copyright (C) 2015 Imagination Technologies Ltd. | |
5 | * | |
6 | * Author: Damien Horsley <Damien.Horsley@imgtec.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify it | |
9 | * under the terms and conditions of the GNU General Public License, | |
10 | * version 2, as published by the Free Software Foundation. | |
11 | */ | |
12 | ||
13 | #include <linux/clk.h> | |
14 | #include <linux/delay.h> | |
15 | #include <linux/mfd/syscon.h> | |
16 | #include <linux/module.h> | |
17 | #include <linux/pm_runtime.h> | |
18 | #include <linux/regmap.h> | |
19 | #include <linux/regulator/consumer.h> | |
20 | ||
21 | #include <sound/pcm_params.h> | |
22 | #include <sound/soc.h> | |
23 | ||
24 | #define PISTACHIO_INTERNAL_DAC_CTRL 0x40 | |
25 | #define PISTACHIO_INTERNAL_DAC_CTRL_PWR_SEL_MASK 0x2 | |
26 | #define PISTACHIO_INTERNAL_DAC_CTRL_PWRDN_MASK 0x1 | |
27 | ||
28 | #define PISTACHIO_INTERNAL_DAC_SRST 0x44 | |
29 | #define PISTACHIO_INTERNAL_DAC_SRST_MASK 0x1 | |
30 | ||
31 | #define PISTACHIO_INTERNAL_DAC_GTI_CTRL 0x48 | |
32 | #define PISTACHIO_INTERNAL_DAC_GTI_CTRL_ADDR_SHIFT 0 | |
33 | #define PISTACHIO_INTERNAL_DAC_GTI_CTRL_ADDR_MASK 0xFFF | |
34 | #define PISTACHIO_INTERNAL_DAC_GTI_CTRL_WE_MASK 0x1000 | |
35 | #define PISTACHIO_INTERNAL_DAC_GTI_CTRL_WDATA_SHIFT 13 | |
36 | #define PISTACHIO_INTERNAL_DAC_GTI_CTRL_WDATA_MASK 0x1FE000 | |
37 | ||
38 | #define PISTACHIO_INTERNAL_DAC_PWR 0x1 | |
39 | #define PISTACHIO_INTERNAL_DAC_PWR_MASK 0x1 | |
40 | ||
41 | #define PISTACHIO_INTERNAL_DAC_FORMATS (SNDRV_PCM_FMTBIT_S24_LE | \ | |
42 | SNDRV_PCM_FMTBIT_S32_LE) | |
43 | ||
44 | /* codec private data */ | |
45 | struct pistachio_internal_dac { | |
46 | struct regmap *regmap; | |
47 | struct regulator *supply; | |
48 | bool mute; | |
49 | }; | |
50 | ||
51 | static const struct snd_kcontrol_new pistachio_internal_dac_snd_controls[] = { | |
52 | SOC_SINGLE("Playback Switch", PISTACHIO_INTERNAL_DAC_CTRL, 2, 1, 1) | |
53 | }; | |
54 | ||
55 | static const struct snd_soc_dapm_widget pistachio_internal_dac_widgets[] = { | |
56 | SND_SOC_DAPM_DAC("DAC", "Playback", SND_SOC_NOPM, 0, 0), | |
57 | SND_SOC_DAPM_OUTPUT("AOUTL"), | |
58 | SND_SOC_DAPM_OUTPUT("AOUTR"), | |
59 | }; | |
60 | ||
61 | static const struct snd_soc_dapm_route pistachio_internal_dac_routes[] = { | |
62 | { "AOUTL", NULL, "DAC" }, | |
63 | { "AOUTR", NULL, "DAC" }, | |
64 | }; | |
65 | ||
66 | static void pistachio_internal_dac_reg_writel(struct regmap *top_regs, | |
67 | u32 val, u32 reg) | |
68 | { | |
69 | regmap_update_bits(top_regs, PISTACHIO_INTERNAL_DAC_GTI_CTRL, | |
70 | PISTACHIO_INTERNAL_DAC_GTI_CTRL_ADDR_MASK, | |
71 | reg << PISTACHIO_INTERNAL_DAC_GTI_CTRL_ADDR_SHIFT); | |
72 | ||
73 | regmap_update_bits(top_regs, PISTACHIO_INTERNAL_DAC_GTI_CTRL, | |
74 | PISTACHIO_INTERNAL_DAC_GTI_CTRL_WDATA_MASK, | |
75 | val << PISTACHIO_INTERNAL_DAC_GTI_CTRL_WDATA_SHIFT); | |
76 | ||
77 | regmap_update_bits(top_regs, PISTACHIO_INTERNAL_DAC_GTI_CTRL, | |
78 | PISTACHIO_INTERNAL_DAC_GTI_CTRL_WE_MASK, | |
79 | PISTACHIO_INTERNAL_DAC_GTI_CTRL_WE_MASK); | |
80 | ||
81 | regmap_update_bits(top_regs, PISTACHIO_INTERNAL_DAC_GTI_CTRL, | |
82 | PISTACHIO_INTERNAL_DAC_GTI_CTRL_WE_MASK, 0); | |
83 | } | |
84 | ||
85 | static void pistachio_internal_dac_pwr_off(struct pistachio_internal_dac *dac) | |
86 | { | |
87 | regmap_update_bits(dac->regmap, PISTACHIO_INTERNAL_DAC_CTRL, | |
88 | PISTACHIO_INTERNAL_DAC_CTRL_PWRDN_MASK, | |
89 | PISTACHIO_INTERNAL_DAC_CTRL_PWRDN_MASK); | |
90 | ||
91 | pistachio_internal_dac_reg_writel(dac->regmap, 0, | |
92 | PISTACHIO_INTERNAL_DAC_PWR); | |
93 | } | |
94 | ||
95 | static void pistachio_internal_dac_pwr_on(struct pistachio_internal_dac *dac) | |
96 | { | |
97 | regmap_update_bits(dac->regmap, PISTACHIO_INTERNAL_DAC_SRST, | |
98 | PISTACHIO_INTERNAL_DAC_SRST_MASK, | |
99 | PISTACHIO_INTERNAL_DAC_SRST_MASK); | |
100 | ||
101 | regmap_update_bits(dac->regmap, PISTACHIO_INTERNAL_DAC_SRST, | |
102 | PISTACHIO_INTERNAL_DAC_SRST_MASK, 0); | |
103 | ||
104 | pistachio_internal_dac_reg_writel(dac->regmap, | |
105 | PISTACHIO_INTERNAL_DAC_PWR_MASK, | |
106 | PISTACHIO_INTERNAL_DAC_PWR); | |
107 | ||
108 | regmap_update_bits(dac->regmap, PISTACHIO_INTERNAL_DAC_CTRL, | |
109 | PISTACHIO_INTERNAL_DAC_CTRL_PWRDN_MASK, 0); | |
110 | } | |
111 | ||
112 | static struct snd_soc_dai_driver pistachio_internal_dac_dais[] = { | |
113 | { | |
114 | .name = "pistachio_internal_dac", | |
115 | .playback = { | |
116 | .stream_name = "Playback", | |
117 | .channels_min = 2, | |
118 | .channels_max = 2, | |
119 | .rates = SNDRV_PCM_RATE_8000_48000, | |
120 | .formats = PISTACHIO_INTERNAL_DAC_FORMATS, | |
121 | } | |
122 | }, | |
123 | }; | |
124 | ||
125 | static int pistachio_internal_dac_codec_probe(struct snd_soc_codec *codec) | |
126 | { | |
127 | struct pistachio_internal_dac *dac = snd_soc_codec_get_drvdata(codec); | |
128 | ||
129 | snd_soc_codec_init_regmap(codec, dac->regmap); | |
130 | ||
131 | return 0; | |
132 | } | |
133 | ||
134 | static const struct snd_soc_codec_driver pistachio_internal_dac_driver = { | |
135 | .probe = pistachio_internal_dac_codec_probe, | |
136 | .idle_bias_off = true, | |
90eb10fc KM |
137 | .component_driver = { |
138 | .controls = pistachio_internal_dac_snd_controls, | |
139 | .num_controls = ARRAY_SIZE(pistachio_internal_dac_snd_controls), | |
140 | .dapm_widgets = pistachio_internal_dac_widgets, | |
141 | .num_dapm_widgets = ARRAY_SIZE(pistachio_internal_dac_widgets), | |
142 | .dapm_routes = pistachio_internal_dac_routes, | |
143 | .num_dapm_routes = ARRAY_SIZE(pistachio_internal_dac_routes), | |
144 | }, | |
39503622 DH |
145 | }; |
146 | ||
147 | static int pistachio_internal_dac_probe(struct platform_device *pdev) | |
148 | { | |
149 | struct pistachio_internal_dac *dac; | |
150 | int ret, voltage; | |
151 | struct device *dev = &pdev->dev; | |
152 | u32 reg; | |
153 | ||
154 | dac = devm_kzalloc(dev, sizeof(*dac), GFP_KERNEL); | |
155 | ||
156 | if (!dac) | |
157 | return -ENOMEM; | |
158 | ||
159 | platform_set_drvdata(pdev, dac); | |
160 | ||
161 | dac->regmap = syscon_regmap_lookup_by_phandle(pdev->dev.of_node, | |
162 | "img,cr-top"); | |
163 | if (IS_ERR(dac->regmap)) | |
164 | return PTR_ERR(dac->regmap); | |
165 | ||
166 | dac->supply = devm_regulator_get(dev, "VDD"); | |
167 | if (IS_ERR(dac->supply)) { | |
168 | ret = PTR_ERR(dac->supply); | |
169 | if (ret != -EPROBE_DEFER) | |
170 | dev_err(dev, "failed to acquire supply 'VDD-supply': %d\n", ret); | |
171 | return ret; | |
172 | } | |
173 | ||
174 | ret = regulator_enable(dac->supply); | |
175 | if (ret) { | |
176 | dev_err(dev, "failed to enable supply: %d\n", ret); | |
177 | return ret; | |
178 | } | |
179 | ||
180 | voltage = regulator_get_voltage(dac->supply); | |
181 | ||
182 | switch (voltage) { | |
183 | case 1800000: | |
184 | reg = 0; | |
185 | break; | |
186 | case 3300000: | |
187 | reg = PISTACHIO_INTERNAL_DAC_CTRL_PWR_SEL_MASK; | |
188 | break; | |
189 | default: | |
190 | dev_err(dev, "invalid voltage: %d\n", voltage); | |
191 | ret = -EINVAL; | |
192 | goto err_regulator; | |
193 | } | |
194 | ||
195 | regmap_update_bits(dac->regmap, PISTACHIO_INTERNAL_DAC_CTRL, | |
196 | PISTACHIO_INTERNAL_DAC_CTRL_PWR_SEL_MASK, reg); | |
197 | ||
198 | pistachio_internal_dac_pwr_off(dac); | |
199 | pistachio_internal_dac_pwr_on(dac); | |
200 | ||
201 | pm_runtime_set_active(dev); | |
202 | pm_runtime_enable(dev); | |
203 | pm_runtime_idle(dev); | |
204 | ||
205 | ret = snd_soc_register_codec(dev, &pistachio_internal_dac_driver, | |
206 | pistachio_internal_dac_dais, | |
207 | ARRAY_SIZE(pistachio_internal_dac_dais)); | |
208 | if (ret) { | |
209 | dev_err(dev, "failed to register codec: %d\n", ret); | |
210 | goto err_pwr; | |
211 | } | |
212 | ||
213 | return 0; | |
214 | ||
215 | err_pwr: | |
216 | pm_runtime_disable(&pdev->dev); | |
217 | pistachio_internal_dac_pwr_off(dac); | |
218 | err_regulator: | |
219 | regulator_disable(dac->supply); | |
220 | ||
221 | return ret; | |
222 | } | |
223 | ||
224 | static int pistachio_internal_dac_remove(struct platform_device *pdev) | |
225 | { | |
226 | struct pistachio_internal_dac *dac = dev_get_drvdata(&pdev->dev); | |
227 | ||
228 | snd_soc_unregister_codec(&pdev->dev); | |
229 | pm_runtime_disable(&pdev->dev); | |
230 | pistachio_internal_dac_pwr_off(dac); | |
231 | regulator_disable(dac->supply); | |
232 | ||
233 | return 0; | |
234 | } | |
235 | ||
236 | #ifdef CONFIG_PM | |
237 | static int pistachio_internal_dac_rt_resume(struct device *dev) | |
238 | { | |
239 | struct pistachio_internal_dac *dac = dev_get_drvdata(dev); | |
240 | int ret; | |
241 | ||
242 | ret = regulator_enable(dac->supply); | |
243 | if (ret) { | |
244 | dev_err(dev, "failed to enable supply: %d\n", ret); | |
245 | return ret; | |
246 | } | |
247 | ||
248 | pistachio_internal_dac_pwr_on(dac); | |
249 | ||
250 | return 0; | |
251 | } | |
252 | ||
253 | static int pistachio_internal_dac_rt_suspend(struct device *dev) | |
254 | { | |
255 | struct pistachio_internal_dac *dac = dev_get_drvdata(dev); | |
256 | ||
257 | pistachio_internal_dac_pwr_off(dac); | |
258 | ||
259 | regulator_disable(dac->supply); | |
260 | ||
261 | return 0; | |
262 | } | |
263 | #endif | |
264 | ||
265 | static const struct dev_pm_ops pistachio_internal_dac_pm_ops = { | |
266 | SET_RUNTIME_PM_OPS(pistachio_internal_dac_rt_suspend, | |
267 | pistachio_internal_dac_rt_resume, NULL) | |
268 | }; | |
269 | ||
270 | static const struct of_device_id pistachio_internal_dac_of_match[] = { | |
271 | { .compatible = "img,pistachio-internal-dac" }, | |
272 | {} | |
273 | }; | |
274 | MODULE_DEVICE_TABLE(of, pistachio_internal_dac_of_match); | |
275 | ||
276 | static struct platform_driver pistachio_internal_dac_plat_driver = { | |
277 | .driver = { | |
278 | .name = "img-pistachio-internal-dac", | |
279 | .of_match_table = pistachio_internal_dac_of_match, | |
280 | .pm = &pistachio_internal_dac_pm_ops | |
281 | }, | |
282 | .probe = pistachio_internal_dac_probe, | |
283 | .remove = pistachio_internal_dac_remove | |
284 | }; | |
285 | module_platform_driver(pistachio_internal_dac_plat_driver); | |
286 | ||
287 | MODULE_DESCRIPTION("Pistachio Internal DAC driver"); | |
288 | MODULE_AUTHOR("Damien Horsley <Damien.Horsley@imgtec.com>"); | |
289 | MODULE_LICENSE("GPL v2"); |