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08bd1686 HV |
1 | /* |
2 | * ASoC driver for Lyrtech SFFSDR board. | |
3 | * | |
4 | * Author: Hugo Villeneuve | |
5 | * Copyright (C) 2008 Lyrtech inc | |
6 | * | |
7 | * Based on ASoC driver for TI DAVINCI EVM platform, original copyright follow: | |
8 | * Copyright: (C) 2007 MontaVista Software, Inc., <source@mvista.com> | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License version 2 as | |
12 | * published by the Free Software Foundation. | |
13 | */ | |
14 | ||
15 | #include <linux/module.h> | |
16 | #include <linux/moduleparam.h> | |
17 | #include <linux/timer.h> | |
18 | #include <linux/interrupt.h> | |
19 | #include <linux/platform_device.h> | |
20 | #include <linux/gpio.h> | |
21 | #include <sound/core.h> | |
22 | #include <sound/pcm.h> | |
23 | #include <sound/soc.h> | |
08bd1686 HV |
24 | |
25 | #include <asm/dma.h> | |
5cf1c00b | 26 | #include <asm/mach-types.h> |
ac37373b | 27 | #ifdef CONFIG_SFFSDR_FPGA |
08bd1686 | 28 | #include <asm/plat-sffsdr/sffsdr-fpga.h> |
ac37373b | 29 | #endif |
08bd1686 | 30 | |
08bd1686 HV |
31 | #include <mach/edma.h> |
32 | ||
33 | #include "../codecs/pcm3008.h" | |
34 | #include "davinci-pcm.h" | |
35 | #include "davinci-i2s.h" | |
36 | ||
14cbba89 HV |
37 | /* |
38 | * CLKX and CLKR are the inputs for the Sample Rate Generator. | |
39 | * FSX and FSR are outputs, driven by the sample Rate Generator. | |
40 | */ | |
41 | #define AUDIO_FORMAT (SND_SOC_DAIFMT_DSP_B | \ | |
42 | SND_SOC_DAIFMT_CBM_CFS | \ | |
43 | SND_SOC_DAIFMT_IB_NF) | |
44 | ||
08bd1686 | 45 | static int sffsdr_hw_params(struct snd_pcm_substream *substream, |
090cec81 | 46 | struct snd_pcm_hw_params *params) |
08bd1686 HV |
47 | { |
48 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
f0fba2ad | 49 | struct snd_soc_dai *cpu_dai = rtd->cpu_dai; |
08bd1686 HV |
50 | int fs; |
51 | int ret = 0; | |
52 | ||
ac37373b HV |
53 | /* Fsref can be 32000, 44100 or 48000. */ |
54 | fs = params_rate(params); | |
55 | ||
56 | #ifndef CONFIG_SFFSDR_FPGA | |
57 | /* Without the FPGA module, the Fs is fixed at 44100 Hz */ | |
58 | if (fs != 44100) { | |
59 | pr_debug("warning: only 44.1 kHz is supported without SFFSDR FPGA module\n"); | |
60 | return -EINVAL; | |
61 | } | |
62 | #endif | |
63 | ||
14cbba89 HV |
64 | /* set cpu DAI configuration */ |
65 | ret = snd_soc_dai_set_fmt(cpu_dai, AUDIO_FORMAT); | |
08bd1686 HV |
66 | if (ret < 0) |
67 | return ret; | |
68 | ||
08bd1686 HV |
69 | pr_debug("sffsdr_hw_params: rate = %d Hz\n", fs); |
70 | ||
ac37373b HV |
71 | #ifndef CONFIG_SFFSDR_FPGA |
72 | return 0; | |
73 | #else | |
08bd1686 | 74 | return sffsdr_fpga_set_codec_fs(fs); |
ac37373b | 75 | #endif |
08bd1686 HV |
76 | } |
77 | ||
78 | static struct snd_soc_ops sffsdr_ops = { | |
79 | .hw_params = sffsdr_hw_params, | |
80 | }; | |
81 | ||
82 | /* davinci-sffsdr digital audio interface glue - connects codec <--> CPU */ | |
83 | static struct snd_soc_dai_link sffsdr_dai = { | |
84 | .name = "PCM3008", /* Codec name */ | |
85 | .stream_name = "PCM3008 HiFi", | |
bedad0ca | 86 | .cpu_dai_name = "davinci-mcbsp", |
f0fba2ad LG |
87 | .codec_dai_name = "pcm3008-hifi", |
88 | .codec_name = "pcm3008-codec", | |
89 | .platform_name = "davinci-pcm-audio", | |
08bd1686 HV |
90 | .ops = &sffsdr_ops, |
91 | }; | |
92 | ||
93 | /* davinci-sffsdr audio machine driver */ | |
87506549 | 94 | static struct snd_soc_card snd_soc_sffsdr = { |
08bd1686 | 95 | .name = "DaVinci SFFSDR", |
36a16d1a | 96 | .owner = THIS_MODULE, |
08bd1686 HV |
97 | .dai_link = &sffsdr_dai, |
98 | .num_links = 1, | |
99 | }; | |
100 | ||
101 | /* sffsdr audio private data */ | |
102 | static struct pcm3008_setup_data sffsdr_pcm3008_setup = { | |
103 | .dem0_pin = GPIO(45), | |
104 | .dem1_pin = GPIO(46), | |
105 | .pdad_pin = GPIO(47), | |
106 | .pdda_pin = GPIO(38), | |
107 | }; | |
108 | ||
f0fba2ad LG |
109 | struct platform_device pcm3008_codec = { |
110 | .name = "pcm3008-codec", | |
111 | .id = 0, | |
112 | .dev = { | |
113 | .platform_data = &sffsdr_pcm3008_setup, | |
114 | }, | |
08bd1686 HV |
115 | }; |
116 | ||
117 | static struct resource sffsdr_snd_resources[] = { | |
118 | { | |
119 | .start = DAVINCI_MCBSP_BASE, | |
120 | .end = DAVINCI_MCBSP_BASE + SZ_8K - 1, | |
121 | .flags = IORESOURCE_MEM, | |
122 | }, | |
123 | }; | |
124 | ||
125 | static struct evm_snd_platform_data sffsdr_snd_data = { | |
126 | .tx_dma_ch = DAVINCI_DMA_MCBSP_TX, | |
127 | .rx_dma_ch = DAVINCI_DMA_MCBSP_RX, | |
128 | }; | |
129 | ||
130 | static struct platform_device *sffsdr_snd_device; | |
131 | ||
132 | static int __init sffsdr_init(void) | |
133 | { | |
134 | int ret; | |
135 | ||
5cf1c00b DB |
136 | if (!machine_is_sffsdr()) |
137 | return -EINVAL; | |
138 | ||
f0fba2ad LG |
139 | platform_device_register(&pcm3008_codec); |
140 | ||
08bd1686 HV |
141 | sffsdr_snd_device = platform_device_alloc("soc-audio", 0); |
142 | if (!sffsdr_snd_device) { | |
143 | printk(KERN_ERR "platform device allocation failed\n"); | |
144 | return -ENOMEM; | |
145 | } | |
146 | ||
f0fba2ad | 147 | platform_set_drvdata(sffsdr_snd_device, &snd_soc_sffsdr); |
bf3dbe5c KH |
148 | platform_device_add_data(sffsdr_snd_device, &sffsdr_snd_data, |
149 | sizeof(sffsdr_snd_data)); | |
08bd1686 HV |
150 | |
151 | ret = platform_device_add_resources(sffsdr_snd_device, | |
152 | sffsdr_snd_resources, | |
153 | ARRAY_SIZE(sffsdr_snd_resources)); | |
154 | if (ret) { | |
fa2eb005 | 155 | printk(KERN_ERR "platform device add resources failed\n"); |
08bd1686 HV |
156 | goto error; |
157 | } | |
158 | ||
159 | ret = platform_device_add(sffsdr_snd_device); | |
160 | if (ret) | |
161 | goto error; | |
162 | ||
163 | return ret; | |
164 | ||
165 | error: | |
166 | platform_device_put(sffsdr_snd_device); | |
167 | return ret; | |
168 | } | |
169 | ||
170 | static void __exit sffsdr_exit(void) | |
171 | { | |
172 | platform_device_unregister(sffsdr_snd_device); | |
f0fba2ad | 173 | platform_device_unregister(&pcm3008_codec); |
08bd1686 HV |
174 | } |
175 | ||
176 | module_init(sffsdr_init); | |
177 | module_exit(sffsdr_exit); | |
178 | ||
179 | MODULE_AUTHOR("Hugo Villeneuve"); | |
180 | MODULE_DESCRIPTION("Lyrtech SFFSDR ASoC driver"); | |
181 | MODULE_LICENSE("GPL"); |