1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Copyright (c) 2010-2011,2013-2015 The Linux Foundation. All rights reserved.
4  *
5  * lpass-ipq806x.c -- ALSA SoC CPU DAI driver for QTi LPASS
6  * Splited out the IPQ8064 soc specific from lpass-cpu.c
7  */
8 
9 #include <linux/clk.h>
10 #include <linux/device.h>
11 #include <linux/err.h>
12 #include <linux/kernel.h>
13 #include <linux/module.h>
14 #include <linux/of.h>
15 #include <linux/platform_device.h>
16 #include <sound/pcm.h>
17 #include <sound/soc.h>
18 #include <sound/soc-dai.h>
19 
20 #include "lpass-lpaif-reg.h"
21 #include "lpass.h"
22 
23 enum lpaif_i2s_ports {
24 	IPQ806X_LPAIF_I2S_PORT_CODEC_SPK,
25 	IPQ806X_LPAIF_I2S_PORT_CODEC_MIC,
26 	IPQ806X_LPAIF_I2S_PORT_SEC_SPK,
27 	IPQ806X_LPAIF_I2S_PORT_SEC_MIC,
28 	IPQ806X_LPAIF_I2S_PORT_MI2S,
29 };
30 
31 enum lpaif_dma_channels {
32 	IPQ806X_LPAIF_RDMA_CHAN_MI2S,
33 	IPQ806X_LPAIF_RDMA_CHAN_PCM0,
34 	IPQ806X_LPAIF_RDMA_CHAN_PCM1,
35 };
36 
37 static struct snd_soc_dai_driver ipq806x_lpass_cpu_dai_driver = {
38 	.id	= IPQ806X_LPAIF_I2S_PORT_MI2S,
39 	.playback = {
40 		.stream_name	= "lpass-cpu-playback",
41 		.formats	= SNDRV_PCM_FMTBIT_S16 |
42 					SNDRV_PCM_FMTBIT_S24 |
43 					SNDRV_PCM_FMTBIT_S32,
44 		.rates		= SNDRV_PCM_RATE_8000 |
45 					SNDRV_PCM_RATE_16000 |
46 					SNDRV_PCM_RATE_32000 |
47 					SNDRV_PCM_RATE_48000 |
48 					SNDRV_PCM_RATE_96000,
49 		.rate_min	= 8000,
50 		.rate_max	= 96000,
51 		.channels_min	= 1,
52 		.channels_max	= 8,
53 	},
54 	.probe	= &asoc_qcom_lpass_cpu_dai_probe,
55 	.ops    = &asoc_qcom_lpass_cpu_dai_ops,
56 };
57 
ipq806x_lpass_init(struct platform_device * pdev)58 static int ipq806x_lpass_init(struct platform_device *pdev)
59 {
60 	struct lpass_data *drvdata = platform_get_drvdata(pdev);
61 	struct device *dev = &pdev->dev;
62 	int ret;
63 
64 	drvdata->ahbix_clk = devm_clk_get(dev, "ahbix-clk");
65 	if (IS_ERR(drvdata->ahbix_clk)) {
66 		dev_err(dev, "error getting ahbix-clk: %ld\n",
67 				PTR_ERR(drvdata->ahbix_clk));
68 		ret = PTR_ERR(drvdata->ahbix_clk);
69 		goto err_ahbix_clk;
70 	}
71 
72 	ret = clk_set_rate(drvdata->ahbix_clk, LPASS_AHBIX_CLOCK_FREQUENCY);
73 	if (ret) {
74 		dev_err(dev, "error setting rate on ahbix_clk: %d\n", ret);
75 		goto err_ahbix_clk;
76 	}
77 	dev_dbg(dev, "set ahbix_clk rate to %lu\n",
78 			clk_get_rate(drvdata->ahbix_clk));
79 
80 	ret = clk_prepare_enable(drvdata->ahbix_clk);
81 	if (ret) {
82 		dev_err(dev, "error enabling ahbix_clk: %d\n", ret);
83 		goto err_ahbix_clk;
84 	}
85 
86 err_ahbix_clk:
87 	return ret;
88 }
89 
ipq806x_lpass_exit(struct platform_device * pdev)90 static int ipq806x_lpass_exit(struct platform_device *pdev)
91 {
92 	struct lpass_data *drvdata = platform_get_drvdata(pdev);
93 
94 	clk_disable_unprepare(drvdata->ahbix_clk);
95 
96 	return 0;
97 }
98 
ipq806x_lpass_alloc_dma_channel(struct lpass_data * drvdata,int dir,unsigned int dai_id)99 static int ipq806x_lpass_alloc_dma_channel(struct lpass_data *drvdata, int dir, unsigned int dai_id)
100 {
101 	if (dir == SNDRV_PCM_STREAM_PLAYBACK)
102 		return IPQ806X_LPAIF_RDMA_CHAN_MI2S;
103 	else	/* Capture currently not implemented */
104 		return -EINVAL;
105 }
106 
ipq806x_lpass_free_dma_channel(struct lpass_data * drvdata,int chan,unsigned int dai_id)107 static int ipq806x_lpass_free_dma_channel(struct lpass_data *drvdata, int chan, unsigned int dai_id)
108 {
109 	return 0;
110 }
111 
112 static struct lpass_variant ipq806x_data = {
113 	.i2sctrl_reg_base	= 0x0010,
114 	.i2sctrl_reg_stride	= 0x04,
115 	.i2s_ports		= 5,
116 	.irq_reg_base		= 0x3000,
117 	.irq_reg_stride		= 0x1000,
118 	.irq_ports		= 3,
119 	.rdma_reg_base		= 0x6000,
120 	.rdma_reg_stride	= 0x1000,
121 	.rdma_channels		= 4,
122 	.wrdma_reg_base		= 0xB000,
123 	.wrdma_reg_stride	= 0x1000,
124 	.wrdma_channel_start	= 5,
125 	.wrdma_channels		= 4,
126 	.loopback		= REG_FIELD_ID(0x0010, 15, 15, 5, 0x4),
127 	.spken			= REG_FIELD_ID(0x0010, 14, 14, 5, 0x4),
128 	.spkmode		= REG_FIELD_ID(0x0010, 10, 13, 5, 0x4),
129 	.spkmono		= REG_FIELD_ID(0x0010, 9, 9, 5, 0x4),
130 	.micen			= REG_FIELD_ID(0x0010, 8, 8, 5, 0x4),
131 	.micmode		= REG_FIELD_ID(0x0010, 4, 7, 5, 0x4),
132 	.micmono		= REG_FIELD_ID(0x0010, 3, 3, 5, 0x4),
133 	.wssrc			= REG_FIELD_ID(0x0010, 2, 2, 5, 0x4),
134 	.bitwidth		= REG_FIELD_ID(0x0010, 0, 1, 5, 0x4),
135 
136 	.rdma_dyncclk		= REG_FIELD_ID(0x6000, 12, 12, 4, 0x1000),
137 	.rdma_bursten		= REG_FIELD_ID(0x6000, 11, 11, 4, 0x1000),
138 	.rdma_wpscnt		= REG_FIELD_ID(0x6000, 8, 10, 4, 0x1000),
139 	.rdma_intf		= REG_FIELD_ID(0x6000, 4, 7, 4, 0x1000),
140 	.rdma_fifowm		= REG_FIELD_ID(0x6000, 1, 3, 4, 0x1000),
141 	.rdma_enable		= REG_FIELD_ID(0x6000, 0, 0, 4, 0x1000),
142 
143 	.wrdma_dyncclk		= REG_FIELD_ID(0xB000, 12, 12, 4, 0x1000),
144 	.wrdma_bursten		= REG_FIELD_ID(0xB000, 11, 11, 4, 0x1000),
145 	.wrdma_wpscnt		= REG_FIELD_ID(0xB000, 8, 10, 4, 0x1000),
146 	.wrdma_intf		= REG_FIELD_ID(0xB000, 4, 7, 4, 0x1000),
147 	.wrdma_fifowm		= REG_FIELD_ID(0xB000, 1, 3, 4, 0x1000),
148 	.wrdma_enable		= REG_FIELD_ID(0xB000, 0, 0, 4, 0x1000),
149 
150 	.dai_driver		= &ipq806x_lpass_cpu_dai_driver,
151 	.num_dai		= 1,
152 	.dai_osr_clk_names	= (const char *[]) {
153 				"mi2s-osr-clk",
154 				},
155 	.dai_bit_clk_names	= (const char *[]) {
156 				"mi2s-bit-clk",
157 				},
158 	.init			= ipq806x_lpass_init,
159 	.exit			= ipq806x_lpass_exit,
160 	.alloc_dma_channel	= ipq806x_lpass_alloc_dma_channel,
161 	.free_dma_channel	= ipq806x_lpass_free_dma_channel,
162 };
163 
164 static const struct of_device_id ipq806x_lpass_cpu_device_id[] __maybe_unused = {
165 	{ .compatible = "qcom,lpass-cpu", .data = &ipq806x_data },
166 	{}
167 };
168 MODULE_DEVICE_TABLE(of, ipq806x_lpass_cpu_device_id);
169 
170 static struct platform_driver ipq806x_lpass_cpu_platform_driver = {
171 	.driver	= {
172 		.name		= "lpass-cpu",
173 		.of_match_table	= of_match_ptr(ipq806x_lpass_cpu_device_id),
174 	},
175 	.probe	= asoc_qcom_lpass_cpu_platform_probe,
176 	.remove	= asoc_qcom_lpass_cpu_platform_remove,
177 };
178 module_platform_driver(ipq806x_lpass_cpu_platform_driver);
179 
180 MODULE_DESCRIPTION("QTi LPASS CPU Driver");
181 MODULE_LICENSE("GPL v2");
182