cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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eukrea-tlv320.c (6314B)

      1// SPDX-License-Identifier: GPL-2.0+
      2//
      3// eukrea-tlv320.c  --  SoC audio for eukrea_cpuimxXX in I2S mode
      4//
      5// Copyright 2010 Eric Bénard, Eukréa Electromatique <eric@eukrea.com>
      6//
      7// based on sound/soc/s3c24xx/s3c24xx_simtec_tlv320aic23.c
      8// which is Copyright 2009 Simtec Electronics
      9// and on sound/soc/imx/phycore-ac97.c which is
     10// Copyright 2009 Sascha Hauer, Pengutronix <s.hauer@pengutronix.de>
     11
     12#include <linux/errno.h>
     13#include <linux/module.h>
     14#include <linux/moduleparam.h>
     15#include <linux/of.h>
     16#include <linux/of_platform.h>
     17#include <linux/device.h>
     18#include <linux/i2c.h>
     19#include <sound/core.h>
     20#include <sound/pcm.h>
     21#include <sound/soc.h>
     22#include <asm/mach-types.h>
     23
     24#include "../codecs/tlv320aic23.h"
     25#include "imx-ssi.h"
     26#include "imx-audmux.h"
     27
     28#define CODEC_CLOCK 12000000
     29
     30static int eukrea_tlv320_hw_params(struct snd_pcm_substream *substream,
     31			    struct snd_pcm_hw_params *params)
     32{
     33	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
     34	struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
     35	struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
     36	int ret;
     37
     38	ret = snd_soc_dai_set_sysclk(codec_dai, 0,
     39				     CODEC_CLOCK, SND_SOC_CLOCK_OUT);
     40	if (ret) {
     41		dev_err(cpu_dai->dev,
     42			"Failed to set the codec sysclk.\n");
     43		return ret;
     44	}
     45
     46	snd_soc_dai_set_tdm_slot(cpu_dai, 0x3, 0x3, 2, 0);
     47
     48	ret = snd_soc_dai_set_sysclk(cpu_dai, IMX_SSP_SYS_CLK, 0,
     49				SND_SOC_CLOCK_IN);
     50	/* fsl_ssi lacks the set_sysclk ops */
     51	if (ret && ret != -EINVAL) {
     52		dev_err(cpu_dai->dev,
     53			"Can't set the IMX_SSP_SYS_CLK CPU system clock.\n");
     54		return ret;
     55	}
     56
     57	return 0;
     58}
     59
     60static const struct snd_soc_ops eukrea_tlv320_snd_ops = {
     61	.hw_params	= eukrea_tlv320_hw_params,
     62};
     63
     64SND_SOC_DAILINK_DEFS(hifi,
     65	DAILINK_COMP_ARRAY(COMP_EMPTY()),
     66	DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "tlv320aic23-hifi")),
     67	DAILINK_COMP_ARRAY(COMP_EMPTY()));
     68
     69static struct snd_soc_dai_link eukrea_tlv320_dai = {
     70	.name		= "tlv320aic23",
     71	.stream_name	= "TLV320AIC23",
     72	.dai_fmt	= SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
     73			  SND_SOC_DAIFMT_CBP_CFP,
     74	.ops		= &eukrea_tlv320_snd_ops,
     75	SND_SOC_DAILINK_REG(hifi),
     76};
     77
     78static struct snd_soc_card eukrea_tlv320 = {
     79	.owner		= THIS_MODULE,
     80	.dai_link	= &eukrea_tlv320_dai,
     81	.num_links	= 1,
     82};
     83
     84static int eukrea_tlv320_probe(struct platform_device *pdev)
     85{
     86	int ret;
     87	int int_port = 0, ext_port;
     88	struct device_node *np = pdev->dev.of_node;
     89	struct device_node *ssi_np = NULL, *codec_np = NULL;
     90
     91	eukrea_tlv320.dev = &pdev->dev;
     92	if (np) {
     93		ret = snd_soc_of_parse_card_name(&eukrea_tlv320,
     94						 "eukrea,model");
     95		if (ret) {
     96			dev_err(&pdev->dev,
     97				"eukrea,model node missing or invalid.\n");
     98			goto err;
     99		}
    100
    101		ssi_np = of_parse_phandle(pdev->dev.of_node,
    102					  "ssi-controller", 0);
    103		if (!ssi_np) {
    104			dev_err(&pdev->dev,
    105				"ssi-controller missing or invalid.\n");
    106			ret = -ENODEV;
    107			goto err;
    108		}
    109
    110		codec_np = of_parse_phandle(ssi_np, "codec-handle", 0);
    111		if (codec_np)
    112			eukrea_tlv320_dai.codecs->of_node = codec_np;
    113		else
    114			dev_err(&pdev->dev, "codec-handle node missing or invalid.\n");
    115
    116		ret = of_property_read_u32(np, "fsl,mux-int-port", &int_port);
    117		if (ret) {
    118			dev_err(&pdev->dev,
    119				"fsl,mux-int-port node missing or invalid.\n");
    120			goto err;
    121		}
    122		ret = of_property_read_u32(np, "fsl,mux-ext-port", &ext_port);
    123		if (ret) {
    124			dev_err(&pdev->dev,
    125				"fsl,mux-ext-port node missing or invalid.\n");
    126			goto err;
    127		}
    128
    129		/*
    130		 * The port numbering in the hardware manual starts at 1, while
    131		 * the audmux API expects it starts at 0.
    132		 */
    133		int_port--;
    134		ext_port--;
    135
    136		eukrea_tlv320_dai.cpus->of_node = ssi_np;
    137		eukrea_tlv320_dai.platforms->of_node = ssi_np;
    138	} else {
    139		eukrea_tlv320_dai.cpus->dai_name = "imx-ssi.0";
    140		eukrea_tlv320_dai.platforms->name = "imx-ssi.0";
    141		eukrea_tlv320_dai.codecs->name = "tlv320aic23-codec.0-001a";
    142		eukrea_tlv320.name = "cpuimx-audio";
    143	}
    144
    145	if (machine_is_eukrea_cpuimx27() ||
    146	    of_find_compatible_node(NULL, NULL, "fsl,imx21-audmux")) {
    147		imx_audmux_v1_configure_port(MX27_AUDMUX_HPCR1_SSI0,
    148			IMX_AUDMUX_V1_PCR_SYN |
    149			IMX_AUDMUX_V1_PCR_TFSDIR |
    150			IMX_AUDMUX_V1_PCR_TCLKDIR |
    151			IMX_AUDMUX_V1_PCR_RFSDIR |
    152			IMX_AUDMUX_V1_PCR_RCLKDIR |
    153			IMX_AUDMUX_V1_PCR_TFCSEL(MX27_AUDMUX_HPCR3_SSI_PINS_4) |
    154			IMX_AUDMUX_V1_PCR_RFCSEL(MX27_AUDMUX_HPCR3_SSI_PINS_4) |
    155			IMX_AUDMUX_V1_PCR_RXDSEL(MX27_AUDMUX_HPCR3_SSI_PINS_4)
    156		);
    157		imx_audmux_v1_configure_port(MX27_AUDMUX_HPCR3_SSI_PINS_4,
    158			IMX_AUDMUX_V1_PCR_SYN |
    159			IMX_AUDMUX_V1_PCR_RXDSEL(MX27_AUDMUX_HPCR1_SSI0)
    160		);
    161	} else if (machine_is_eukrea_cpuimx25sd() ||
    162		   machine_is_eukrea_cpuimx35sd() ||
    163		   machine_is_eukrea_cpuimx51sd() ||
    164		   of_find_compatible_node(NULL, NULL, "fsl,imx31-audmux")) {
    165		if (!np)
    166			ext_port = machine_is_eukrea_cpuimx25sd() ?
    167				4 : 3;
    168
    169		imx_audmux_v2_configure_port(int_port,
    170			IMX_AUDMUX_V2_PTCR_SYN |
    171			IMX_AUDMUX_V2_PTCR_TFSDIR |
    172			IMX_AUDMUX_V2_PTCR_TFSEL(ext_port) |
    173			IMX_AUDMUX_V2_PTCR_TCLKDIR |
    174			IMX_AUDMUX_V2_PTCR_TCSEL(ext_port),
    175			IMX_AUDMUX_V2_PDCR_RXDSEL(ext_port)
    176		);
    177		imx_audmux_v2_configure_port(ext_port,
    178			IMX_AUDMUX_V2_PTCR_SYN,
    179			IMX_AUDMUX_V2_PDCR_RXDSEL(int_port)
    180		);
    181	} else {
    182		if (np) {
    183			/* The eukrea,asoc-tlv320 driver was explicitly
    184			 * requested (through the device tree).
    185			 */
    186			dev_err(&pdev->dev,
    187				"Missing or invalid audmux DT node.\n");
    188			return -ENODEV;
    189		} else {
    190			/* Return happy.
    191			 * We might run on a totally different machine.
    192			 */
    193			return 0;
    194		}
    195	}
    196
    197	ret = snd_soc_register_card(&eukrea_tlv320);
    198err:
    199	if (ret)
    200		dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
    201	of_node_put(ssi_np);
    202
    203	return ret;
    204}
    205
    206static int eukrea_tlv320_remove(struct platform_device *pdev)
    207{
    208	snd_soc_unregister_card(&eukrea_tlv320);
    209
    210	return 0;
    211}
    212
    213static const struct of_device_id imx_tlv320_dt_ids[] = {
    214	{ .compatible = "eukrea,asoc-tlv320"},
    215	{ /* sentinel */ }
    216};
    217MODULE_DEVICE_TABLE(of, imx_tlv320_dt_ids);
    218
    219static struct platform_driver eukrea_tlv320_driver = {
    220	.driver = {
    221		.name = "eukrea_tlv320",
    222		.of_match_table = imx_tlv320_dt_ids,
    223	},
    224	.probe = eukrea_tlv320_probe,
    225	.remove = eukrea_tlv320_remove,
    226};
    227
    228module_platform_driver(eukrea_tlv320_driver);
    229
    230MODULE_AUTHOR("Eric Bénard <eric@eukrea.com>");
    231MODULE_DESCRIPTION("CPUIMX ALSA SoC driver");
    232MODULE_LICENSE("GPL");
    233MODULE_ALIAS("platform:eukrea_tlv320");