2 * Copyright (C) 2008-2013 Freescale Semiconductor, Inc. All Rights Reserved.
6 * The code contained herein is licensed under the GNU General Public
7 * License. You may obtain a copy of the GNU General Public License
8 * Version 2 or later at the following locations:
10 * http://www.opensource.org/licenses/gpl-license.html
11 * http://www.gnu.org/copyleft/gpl.html
14 #include <linux/module.h>
15 #include <linux/of_platform.h>
16 #include <sound/soc.h>
18 #include "imx-audmux.h"
20 static int imx_audmux_config(int slave, int master)
22 unsigned int ptcr, pdcr;
26 ptcr = IMX_AUDMUX_V2_PTCR_SYN |
27 IMX_AUDMUX_V2_PTCR_TFSDIR |
28 IMX_AUDMUX_V2_PTCR_TFSEL(slave) |
29 IMX_AUDMUX_V2_PTCR_TCLKDIR |
30 IMX_AUDMUX_V2_PTCR_TCSEL(slave);
31 pdcr = IMX_AUDMUX_V2_PDCR_RXDSEL(slave);
32 imx_audmux_v2_configure_port(master, ptcr, pdcr);
34 ptcr = IMX_AUDMUX_V2_PTCR_SYN;
35 pdcr = IMX_AUDMUX_V2_PDCR_RXDSEL(master);
36 imx_audmux_v2_configure_port(slave, ptcr, pdcr);
41 static int imx_si476x_hw_params(struct snd_pcm_substream *substream,
42 struct snd_pcm_hw_params *params)
44 struct snd_soc_pcm_runtime *rtd = substream->private_data;
45 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
46 u32 channels = params_channels(params);
47 u32 rate = params_rate(params);
48 u32 bclk = rate * channels * 32;
51 /* set cpu DAI configuration */
52 ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S
53 | SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
55 dev_err(cpu_dai->dev, "failed to set dai fmt\n");
59 ret = snd_soc_dai_set_tdm_slot(cpu_dai,
60 channels == 1 ? 0xfffffffe : 0xfffffffc,
61 channels == 1 ? 0xfffffffe : 0xfffffffc,
64 dev_err(cpu_dai->dev, "failed to set dai tdm slot\n");
68 ret = snd_soc_dai_set_sysclk(cpu_dai, 0, bclk, SND_SOC_CLOCK_OUT);
70 dev_err(cpu_dai->dev, "failed to set sysclk\n");
75 static struct snd_soc_ops imx_si476x_ops = {
76 .hw_params = imx_si476x_hw_params,
79 static struct snd_soc_dai_link imx_dai = {
81 .stream_name = "imx-si476x",
82 .codec_dai_name = "si476x-codec",
83 .codec_name = "si476x-codec.99",
84 .ops = &imx_si476x_ops,
87 static struct snd_soc_card snd_soc_card_imx_3stack = {
88 .name = "imx-audio-si476x",
93 static int imx_si476x_probe(struct platform_device *pdev)
95 struct snd_soc_card *card = &snd_soc_card_imx_3stack;
96 struct device_node *ssi_np, *np = pdev->dev.of_node;
97 struct platform_device *ssi_pdev;
98 int int_port, ext_port, ret;
100 ret = of_property_read_u32(np, "mux-int-port", &int_port);
102 dev_err(&pdev->dev, "mux-int-port missing or invalid\n");
106 ret = of_property_read_u32(np, "mux-ext-port", &ext_port);
108 dev_err(&pdev->dev, "mux-ext-port missing or invalid\n");
112 imx_audmux_config(int_port, ext_port);
114 ssi_np = of_parse_phandle(pdev->dev.of_node, "ssi-controller", 0);
116 dev_err(&pdev->dev, "phandle missing or invalid\n");
120 ssi_pdev = of_find_device_by_node(ssi_np);
122 dev_err(&pdev->dev, "failed to find SSI platform device\n");
127 card->dev = &pdev->dev;
128 card->dai_link->cpu_dai_name = dev_name(&ssi_pdev->dev);
129 card->dai_link->platform_of_node = ssi_np;
131 ret = snd_soc_register_card(card);
133 dev_err(&pdev->dev, "Failed to register card: %d\n", ret);
142 static int imx_si476x_remove(struct platform_device *pdev)
144 struct snd_soc_card *card = &snd_soc_card_imx_3stack;
146 snd_soc_unregister_card(card);
151 static const struct of_device_id imx_si476x_dt_ids[] = {
152 { .compatible = "fsl,imx-audio-si476x", },
155 MODULE_DEVICE_TABLE(of, imx_si476x_dt_ids);
157 static struct platform_driver imx_si476x_driver = {
159 .name = "imx-tuner-si476x",
160 .owner = THIS_MODULE,
161 .of_match_table = imx_si476x_dt_ids,
163 .probe = imx_si476x_probe,
164 .remove = imx_si476x_remove,
167 module_platform_driver(imx_si476x_driver);
169 /* Module information */
170 MODULE_AUTHOR("Freescale Semiconductor, Inc.");
171 MODULE_DESCRIPTION("ALSA SoC i.MX si476x");
172 MODULE_LICENSE("GPL");
173 MODULE_ALIAS("platform:imx-tuner-si476x");