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Diffstat (limited to 'sound/soc/s3c24xx/cc9m2443js_wm8753.c')
-rw-r--r--sound/soc/s3c24xx/cc9m2443js_wm8753.c298
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diff --git a/sound/soc/s3c24xx/cc9m2443js_wm8753.c b/sound/soc/s3c24xx/cc9m2443js_wm8753.c
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+++ b/sound/soc/s3c24xx/cc9m2443js_wm8753.c
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+/* -*- linux-c -*-
+ *
+ * cc9m2443js_wm8753.c -- SoC audio for the Digi CC9M2443JS
+ *
+ * Copyright 2007 Wolfson Microelectronics PLC.
+ * Author: Graeme Gregory
+ * graeme.gregory@wolfsonmicro.com or linux@wolfsonmicro.com
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * Based on the driver of the Neo1973
+ *
+ * IMPORTANT: In difference to the Neo1973, we are using the S3C2443 as master
+ * and not as slave. That means, the configuration of the codec is quite different
+ * (Luis Galdos)
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/i2c.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/soc.h>
+#include <sound/soc-dapm.h>
+#include <linux/math64.h>
+#include <linux/clk.h>
+
+#include <asm/mach-types.h>
+#include <asm/hardware/scoop.h>
+#include <mach/regs-clock.h>
+#include <mach/regs-gpio.h>
+#include <mach/hardware.h>
+#include <mach/audio.h>
+#include <linux/io.h>
+#include <mach/spi-gpio.h>
+#include <sound/pcm_params.h>
+
+#include <asm/plat-s3c24xx/regs-iis.h>
+
+#include "../codecs/wm8753.h"
+#include "lm4857.h"
+#include "s3c24xx-pcm.h"
+#include "s3c2412-i2s.h"
+
+/* Additional info and error messages */
+#define printk_err(fmt, args...) printk(KERN_ERR "[ ERROR ] cc9m2443-snd: " fmt, ## args)
+#define printk_info(fmt, args...) printk(KERN_INFO "cc9m2443-snd: " fmt, ## args)
+
+#if 0
+#define CC9M2443JS_SND_DEBUG
+#endif
+
+#ifdef CC9M2443JS_SND_DEBUG
+# define printk_debug(fmt, args...) printk(KERN_DEBUG "cc9m2443-snd: %s() " fmt, __func__ , ## args)
+#else
+# define printk_debug(fmt, args...)
+#endif
+
+static int cc9m2443js_hifi_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
+ struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
+ unsigned int pll_out = 0, bclk = 0;
+ int ret = 0;
+ unsigned long bitfs, is16bit;
+ struct s3c2412_rate_calc info;
+
+ switch (params_rate(params)) {
+ case 8000:
+ case 16000:
+ pll_out = 12288000;
+ break;
+ case 48000:
+ bclk = WM8753_BCLK_DIV_4;
+ pll_out = 12288000;
+ break;
+ case 96000:
+ bclk = WM8753_BCLK_DIV_2;
+ pll_out = 12288000;
+ break;
+ case 11025:
+ bclk = WM8753_BCLK_DIV_16;
+ pll_out = 11289600;
+ break;
+ case 22050:
+ bclk = WM8753_BCLK_DIV_8;
+ pll_out = 11289600;
+ break;
+ case 44100:
+ bclk = WM8753_BCLK_DIV_4;
+ pll_out = 11289600;
+ break;
+ case 88200:
+ bclk = WM8753_BCLK_DIV_2;
+ pll_out = 11289600;
+ break;
+ }
+
+ /* cpu_iis_mclk = iis_clkrate / params_rate(params); */
+ s3c2412_iis_calc_rate(&info, NULL, params_rate(params), s3c2412_get_iisclk());
+
+ printk_debug("Sample rate %i | Master Clk %lu Hz | FS %u | Clk divisor %u\n",
+ params_rate(params), clk_get_rate(s3c2412_get_iisclk()),
+ info.fs_div, info.clk_div);
+
+ /* REQUIRED: Set codec DAI configuration (normal bclk and frm ) and as slave */
+ ret = codec_dai->dai_ops.set_fmt(codec_dai,
+ SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
+ SND_SOC_DAIFMT_CBS_CFS);
+ if (ret < 0)
+ return ret;
+
+ /* REQUIRED: Set cpu DAI configuration (normal bclk and frm) and CPU as master */
+ ret = cpu_dai->dai_ops.set_fmt(cpu_dai,
+ SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
+ SND_SOC_DAIFMT_CBS_CFS);
+ if (ret < 0)
+ return ret;
+
+ /* REQUIRED: Set the codec system clock for DAC and ADC */
+ ret = codec_dai->dai_ops.set_sysclk(codec_dai, WM8753_MCLK, pll_out,
+ SND_SOC_CLOCK_OUT);
+ if (ret < 0) {
+ printk_err("set_sysclk() failed (%i)\n", ret);
+ return ret;
+ }
+
+ /* REQUIRED: Set MCLK division for sample rate (256, 384, 512, 768) */
+ ret = cpu_dai->dai_ops.set_clkdiv(cpu_dai, S3C2412_DIV_RCLK, info.fs_div);
+ if (ret < 0)
+ return ret;
+
+ /*
+ * Set the BCLK configuration for the CPU
+ * The required value depends on the configured root clock (RFS) according
+ * to the table 25-2 of the data sheet of the S3C2443
+ * @XXX: Define the corresponding macros for the Bit FS selection
+ */
+ is16bit = (params_format(params) == SNDRV_PCM_FORMAT_S16_LE) ? 1 : 0;
+ switch (info.fs_div) {
+ case 256:
+ bitfs = (is16bit) ? 0x0 : 0x2;
+ break;
+ case 512:
+ bitfs = (is16bit) ? 0x0 : 0x2;
+ break;
+ case 384:
+ bitfs = (is16bit) ? 0x0 : 0x2;
+ break;
+ case 768:
+ bitfs = (is16bit) ? 0x0 : 0x2;
+ break;
+ default:
+ printk_err("Unsupported root clock FS %i divisor found\n", info.fs_div);
+ ret = -EINVAL;
+ goto exit_all;
+ break;
+ }
+
+ ret = cpu_dai->dai_ops.set_clkdiv(cpu_dai, S3C2412_DIV_BCLK, bitfs);
+ if (ret) {
+ printk_err("Couldn't set the BLCK, %i\n", ret);
+ return ret;
+ }
+
+ /* Set the prescaler divisor for the master clock */
+ ret = cpu_dai->dai_ops.set_clkdiv(cpu_dai, S3C2412_DIV_PRESCALER,
+ info.clk_div);
+ if (ret < 0) {
+ printk_err("Prescaler setting failed, %i\n", ret);
+ return ret;
+ }
+
+ exit_all:
+ return ret;
+}
+
+static int cc9m2443js_hifi_hw_free(struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
+
+ /* disable the PLL */
+ return codec_dai->dai_ops.set_pll(codec_dai, WM8753_PLL1, 0, 0);
+}
+
+static int cc9m2443js_hifi_startup(struct snd_pcm_substream *substream)
+{
+ printk_debug("Going to startup the codec\n");
+
+ return 0;
+}
+
+/* We don't need this function, but we know that they are available */
+static void cc9m2443js_hifi_shutdown(struct snd_pcm_substream *substream)
+{
+ printk_debug("Going to shutdown the codec\n");
+}
+
+/*
+ * WM8753 HiFi DAI operations.
+ */
+static struct snd_soc_ops cc9m2443js_hifi_ops = {
+ .hw_params = cc9m2443js_hifi_hw_params,
+ .hw_free = cc9m2443js_hifi_hw_free,
+ .startup = cc9m2443js_hifi_startup,
+ .shutdown = cc9m2443js_hifi_shutdown,
+};
+
+/*
+ * Structure for the interface with the DAIs of the codec and CPU
+ * The two below elements will be probed by the same I2S-driver
+ */
+static struct snd_soc_dai_link cc9m2443js_dai[] = {
+ {
+ /*
+ * Hifi Playback
+ * Infos under: proc/asound/card0/pcm0p/info
+ */
+ .name = "WM8753",
+ .stream_name = "WM8753 HiFi",
+ .cpu_dai = &s3c2443_i2s_dai,
+ .codec_dai = &wm8753_dai[WM8753_DAI_HIFI],
+ /* .init = cc9m2443js_wm8753_snd_init, */
+ .ops = &cc9m2443js_hifi_ops,
+ },{
+ /*
+ * Voice
+ * Infos under: proc/asound/card0/pcm1c/info
+ */
+ .name = "Inline",
+ .stream_name = "WM8753 Inline",
+ .cpu_dai = &s3c2443_i2s_dai,
+ .codec_dai = &wm8753_dai[WM8753_DAI_HIFI],
+ .ops = &cc9m2443js_hifi_ops,
+ }
+};
+
+/* This is the machine-structure */
+static struct snd_soc_machine cc9m2443js_snd = {
+ .name = "cc9m2443js",
+ .dai_link = cc9m2443js_dai,
+ .num_links = ARRAY_SIZE(cc9m2443js_dai),
+};
+
+static struct wm8753_setup_data cc9m2443js_wm8753_setup = {
+ .i2c_address = 0x1a,
+ .i2c_bus = CONFIG_CC9M2443JS_WM8753_I2C_ADAPTER,
+};
+
+static struct snd_soc_device cc9m2443js_snd_devdata = {
+ .machine = &cc9m2443js_snd,
+ .platform = &s3c24xx_soc_platform,
+ .codec_dev = &soc_codec_dev_wm8753,
+ .codec_data = &cc9m2443js_wm8753_setup,
+};
+
+static struct platform_device *cc9m2443js_snd_device;
+
+static int __init cc9m2443js_wm8753_init(void)
+{
+ int ret;
+
+ cc9m2443js_snd_device = platform_device_alloc("soc-audio", -1);
+ if (!cc9m2443js_snd_device)
+ return -ENOMEM;
+
+ platform_set_drvdata(cc9m2443js_snd_device, &cc9m2443js_snd_devdata);
+ cc9m2443js_snd_devdata.dev = &cc9m2443js_snd_device->dev;
+ ret = platform_device_add(cc9m2443js_snd_device);
+ if (ret)
+ platform_device_put(cc9m2443js_snd_device);
+
+ return ret;
+}
+
+static void __exit cc9m2443js_wm8753_exit(void)
+{
+ platform_device_unregister(cc9m2443js_snd_device);
+}
+
+module_init(cc9m2443js_wm8753_init);
+module_exit(cc9m2443js_wm8753_exit);
+
+/* Module information */
+MODULE_AUTHOR("Graeme Gregory, graeme@openmoko.org, www.openmoko.org");
+MODULE_AUTHOR("Luis Galdos, luis.galdos[at]digi.com");
+MODULE_DESCRIPTION("ALSA SoC WM8753 Digi CC9M2443JS");
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.0.4) at 2024-05-23 19:16:29 +0000