1 /*
2 * Copyright (c) 2010-2011,2013-2015 The Linux Foundation. All rights reserved.
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 and
6 * only version 2 as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 *
13 * lpass-ipq806x.c -- ALSA SoC CPU DAI driver for QTi LPASS
14 * Splited out the IPQ8064 soc specific from lpass-cpu.c
15 */
16
17 #include <linux/clk.h>
18 #include <linux/device.h>
19 #include <linux/err.h>
20 #include <linux/kernel.h>
21 #include <linux/module.h>
22 #include <linux/of.h>
23 #include <linux/platform_device.h>
24 #include <sound/pcm.h>
25 #include <sound/soc.h>
26 #include <sound/soc-dai.h>
27
28 #include "lpass-lpaif-reg.h"
29 #include "lpass.h"
30
31 enum lpaif_i2s_ports {
32 IPQ806X_LPAIF_I2S_PORT_CODEC_SPK,
33 IPQ806X_LPAIF_I2S_PORT_CODEC_MIC,
34 IPQ806X_LPAIF_I2S_PORT_SEC_SPK,
35 IPQ806X_LPAIF_I2S_PORT_SEC_MIC,
36 IPQ806X_LPAIF_I2S_PORT_MI2S,
37 };
38
39 enum lpaif_dma_channels {
40 IPQ806X_LPAIF_RDMA_CHAN_MI2S,
41 IPQ806X_LPAIF_RDMA_CHAN_PCM0,
42 IPQ806X_LPAIF_RDMA_CHAN_PCM1,
43 };
44
45 static struct snd_soc_dai_driver ipq806x_lpass_cpu_dai_driver = {
46 .id = IPQ806X_LPAIF_I2S_PORT_MI2S,
47 .playback = {
48 .stream_name = "lpass-cpu-playback",
49 .formats = SNDRV_PCM_FMTBIT_S16 |
50 SNDRV_PCM_FMTBIT_S24 |
51 SNDRV_PCM_FMTBIT_S32,
52 .rates = SNDRV_PCM_RATE_8000 |
53 SNDRV_PCM_RATE_16000 |
54 SNDRV_PCM_RATE_32000 |
55 SNDRV_PCM_RATE_48000 |
56 SNDRV_PCM_RATE_96000,
57 .rate_min = 8000,
58 .rate_max = 96000,
59 .channels_min = 1,
60 .channels_max = 8,
61 },
62 .probe = &asoc_qcom_lpass_cpu_dai_probe,
63 .ops = &asoc_qcom_lpass_cpu_dai_ops,
64 };
65
ipq806x_lpass_alloc_dma_channel(struct lpass_data * drvdata,int dir)66 static int ipq806x_lpass_alloc_dma_channel(struct lpass_data *drvdata, int dir)
67 {
68 if (dir == SNDRV_PCM_STREAM_PLAYBACK)
69 return IPQ806X_LPAIF_RDMA_CHAN_MI2S;
70 else /* Capture currently not implemented */
71 return -EINVAL;
72 }
73
ipq806x_lpass_free_dma_channel(struct lpass_data * drvdata,int chan)74 static int ipq806x_lpass_free_dma_channel(struct lpass_data *drvdata, int chan)
75 {
76 return 0;
77 }
78
79 static struct lpass_variant ipq806x_data = {
80 .i2sctrl_reg_base = 0x0010,
81 .i2sctrl_reg_stride = 0x04,
82 .i2s_ports = 5,
83 .irq_reg_base = 0x3000,
84 .irq_reg_stride = 0x1000,
85 .irq_ports = 3,
86 .rdma_reg_base = 0x6000,
87 .rdma_reg_stride = 0x1000,
88 .rdma_channels = 4,
89 .wrdma_reg_base = 0xB000,
90 .wrdma_reg_stride = 0x1000,
91 .wrdma_channel_start = 5,
92 .wrdma_channels = 4,
93 .dai_driver = &ipq806x_lpass_cpu_dai_driver,
94 .num_dai = 1,
95 .dai_osr_clk_names = (const char *[]) {
96 "mi2s-osr-clk",
97 },
98 .dai_bit_clk_names = (const char *[]) {
99 "mi2s-bit-clk",
100 },
101 .alloc_dma_channel = ipq806x_lpass_alloc_dma_channel,
102 .free_dma_channel = ipq806x_lpass_free_dma_channel,
103 };
104
105 static const struct of_device_id ipq806x_lpass_cpu_device_id[] = {
106 { .compatible = "qcom,lpass-cpu", .data = &ipq806x_data },
107 {}
108 };
109 MODULE_DEVICE_TABLE(of, ipq806x_lpass_cpu_device_id);
110
111 static struct platform_driver ipq806x_lpass_cpu_platform_driver = {
112 .driver = {
113 .name = "lpass-cpu",
114 .of_match_table = of_match_ptr(ipq806x_lpass_cpu_device_id),
115 },
116 .probe = asoc_qcom_lpass_cpu_platform_probe,
117 .remove = asoc_qcom_lpass_cpu_platform_remove,
118 };
119 module_platform_driver(ipq806x_lpass_cpu_platform_driver);
120
121 MODULE_DESCRIPTION("QTi LPASS CPU Driver");
122 MODULE_LICENSE("GPL v2");
123
