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Diffstat (limited to 'sound/soc/at91/eti_b1_wm8731.c')
-rw-r--r--sound/soc/at91/eti_b1_wm8731.c375
1 files changed, 375 insertions, 0 deletions
diff --git a/sound/soc/at91/eti_b1_wm8731.c b/sound/soc/at91/eti_b1_wm8731.c
new file mode 100644
index 00000000000..8179df3bb2f
--- /dev/null
+++ b/sound/soc/at91/eti_b1_wm8731.c
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+/*
+ * eti_b1_wm8731 -- SoC audio for AT91RM9200-based Endrelia ETI_B1 board.
+ *
+ * Author: Frank Mandarino <fmandarino@endrelia.com>
+ * Endrelia Technologies Inc.
+ * Created: Mar 29, 2006
+ *
+ * Based on corgi.c by:
+ *
+ * Copyright 2005 Wolfson Microelectronics PLC.
+ * Copyright 2005 Openedhand Ltd.
+ *
+ * Authors: Liam Girdwood <liam.girdwood@wolfsonmicro.com>
+ * Richard Purdie <richard@openedhand.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.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/version.h>
+#include <linux/kernel.h>
+#include <linux/clk.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <sound/driver.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/soc.h>
+#include <sound/soc-dapm.h>
+
+#include <asm/arch/hardware.h>
+#include <asm/arch/at91_pio.h>
+#include <asm/arch/gpio.h>
+
+#include "../codecs/wm8731.h"
+#include "at91-pcm.h"
+#include "at91-i2s.h"
+
+#if 0
+#define DBG(x...) printk(KERN_INFO "eti_b1_wm8731: " x)
+#else
+#define DBG(x...)
+#endif
+
+#define AT91_PIO_TF1 (1 << (AT91_PIN_PB6 - PIN_BASE) % 32)
+#define AT91_PIO_TK1 (1 << (AT91_PIN_PB7 - PIN_BASE) % 32)
+#define AT91_PIO_TD1 (1 << (AT91_PIN_PB8 - PIN_BASE) % 32)
+#define AT91_PIO_RD1 (1 << (AT91_PIN_PB9 - PIN_BASE) % 32)
+#define AT91_PIO_RK1 (1 << (AT91_PIN_PB10 - PIN_BASE) % 32)
+#define AT91_PIO_RF1 (1 << (AT91_PIN_PB11 - PIN_BASE) % 32)
+
+static struct clk *pck1_clk;
+static struct clk *pllb_clk;
+
+
+static int eti_b1_startup(struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_codec_dai *codec_dai = rtd->dai->codec_dai;
+ struct snd_soc_cpu_dai *cpu_dai = rtd->dai->cpu_dai;
+ int ret;
+
+ /* cpu clock is the AT91 master clock sent to the SSC */
+ ret = cpu_dai->dai_ops.set_sysclk(cpu_dai, AT91_SYSCLK_MCK,
+ 60000000, SND_SOC_CLOCK_IN);
+ if (ret < 0)
+ return ret;
+
+ /* codec system clock is supplied by PCK1, set to 12MHz */
+ ret = codec_dai->dai_ops.set_sysclk(codec_dai, WM8731_SYSCLK,
+ 12000000, SND_SOC_CLOCK_IN);
+ if (ret < 0)
+ return ret;
+
+ /* Start PCK1 clock. */
+ clk_enable(pck1_clk);
+ DBG("pck1 started\n");
+
+ return 0;
+}
+
+static void eti_b1_shutdown(struct snd_pcm_substream *substream)
+{
+ /* Stop PCK1 clock. */
+ clk_disable(pck1_clk);
+ DBG("pck1 stopped\n");
+}
+
+static int eti_b1_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_codec_dai *codec_dai = rtd->dai->codec_dai;
+ struct snd_soc_cpu_dai *cpu_dai = rtd->dai->cpu_dai;
+ int ret;
+
+#ifdef CONFIG_SND_AT91_SOC_ETI_SLAVE
+ unsigned int rate;
+ int cmr_div, period;
+
+ /* set codec DAI configuration */
+ 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;
+
+ /* set cpu DAI configuration */
+ 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;
+
+ /*
+ * The SSC clock dividers depend on the sample rate. The CMR.DIV
+ * field divides the system master clock MCK to drive the SSC TK
+ * signal which provides the codec BCLK. The TCMR.PERIOD and
+ * RCMR.PERIOD fields further divide the BCLK signal to drive
+ * the SSC TF and RF signals which provide the codec DACLRC and
+ * ADCLRC clocks.
+ *
+ * The dividers were determined through trial and error, where a
+ * CMR.DIV value is chosen such that the resulting BCLK value is
+ * divisible, or almost divisible, by (2 * sample rate), and then
+ * the TCMR.PERIOD or RCMR.PERIOD is BCLK / (2 * sample rate) - 1.
+ */
+ rate = params_rate(params);
+
+ switch (rate) {
+ case 8000:
+ cmr_div = 25; /* BCLK = 60MHz/(2*25) = 1.2MHz */
+ period = 74; /* LRC = BCLK/(2*(74+1)) = 8000Hz */
+ break;
+ case 32000:
+ cmr_div = 7; /* BCLK = 60MHz/(2*7) ~= 4.28571428MHz */
+ period = 66; /* LRC = BCLK/(2*(66+1)) = 31982.942Hz */
+ break;
+ case 48000:
+ cmr_div = 13; /* BCLK = 60MHz/(2*13) ~= 2.3076923MHz */
+ period = 23; /* LRC = BCLK/(2*(23+1)) = 48076.923Hz */
+ break;
+ default:
+ printk(KERN_WARNING "unsupported rate %d on ETI-B1 board\n", rate);
+ return -EINVAL;
+ }
+
+ /* set the MCK divider for BCLK */
+ ret = cpu_dai->dai_ops.set_clkdiv(cpu_dai, AT91SSC_CMR_DIV, cmr_div);
+ if (ret < 0)
+ return ret;
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ /* set the BCLK divider for DACLRC */
+ ret = cpu_dai->dai_ops.set_clkdiv(cpu_dai,
+ AT91SSC_TCMR_PERIOD, period);
+ } else {
+ /* set the BCLK divider for ADCLRC */
+ ret = cpu_dai->dai_ops.set_clkdiv(cpu_dai,
+ AT91SSC_RCMR_PERIOD, period);
+ }
+ if (ret < 0)
+ return ret;
+
+#else /* CONFIG_SND_AT91_SOC_ETI_SLAVE */
+ /*
+ * Codec in Master Mode.
+ */
+
+ /* set codec DAI configuration */
+ ret = codec_dai->dai_ops.set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
+ SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);
+ if (ret < 0)
+ return ret;
+
+ /* set cpu DAI configuration */
+ ret = cpu_dai->dai_ops.set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
+ SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);
+ if (ret < 0)
+ return ret;
+
+#endif /* CONFIG_SND_AT91_SOC_ETI_SLAVE */
+
+ return 0;
+}
+
+static struct snd_soc_ops eti_b1_ops = {
+ .startup = eti_b1_startup,
+ .hw_params = eti_b1_hw_params,
+ .shutdown = eti_b1_shutdown,
+};
+
+
+static const struct snd_soc_dapm_widget eti_b1_dapm_widgets[] = {
+ SND_SOC_DAPM_MIC("Int Mic", NULL),
+ SND_SOC_DAPM_SPK("Ext Spk", NULL),
+};
+
+static const char *intercon[][3] = {
+
+ /* speaker connected to LHPOUT */
+ {"Ext Spk", NULL, "LHPOUT"},
+
+ /* mic is connected to Mic Jack, with WM8731 Mic Bias */
+ {"MICIN", NULL, "Mic Bias"},
+ {"Mic Bias", NULL, "Int Mic"},
+
+ /* terminator */
+ {NULL, NULL, NULL},
+};
+
+/*
+ * Logic for a wm8731 as connected on a Endrelia ETI-B1 board.
+ */
+static int eti_b1_wm8731_init(struct snd_soc_codec *codec)
+{
+ int i;
+
+ DBG("eti_b1_wm8731_init() called\n");
+
+ /* Add specific widgets */
+ for(i = 0; i < ARRAY_SIZE(eti_b1_dapm_widgets); i++) {
+ snd_soc_dapm_new_control(codec, &eti_b1_dapm_widgets[i]);
+ }
+
+ /* Set up specific audio path interconnects */
+ for(i = 0; intercon[i][0] != NULL; i++) {
+ snd_soc_dapm_connect_input(codec, intercon[i][0],
+ intercon[i][1], intercon[i][2]);
+ }
+
+ /* not connected */
+ snd_soc_dapm_set_endpoint(codec, "RLINEIN", 0);
+ snd_soc_dapm_set_endpoint(codec, "LLINEIN", 0);
+
+ /* always connected */
+ snd_soc_dapm_set_endpoint(codec, "Int Mic", 1);
+ snd_soc_dapm_set_endpoint(codec, "Ext Spk", 1);
+
+ snd_soc_dapm_sync_endpoints(codec);
+
+ return 0;
+}
+
+static struct snd_soc_dai_link eti_b1_dai = {
+ .name = "WM8731",
+ .stream_name = "WM8731",
+ .cpu_dai = &at91_i2s_dai[1],
+ .codec_dai = &wm8731_dai,
+ .init = eti_b1_wm8731_init,
+ .ops = &eti_b1_ops,
+};
+
+static struct snd_soc_machine snd_soc_machine_eti_b1 = {
+ .name = "ETI_B1",
+ .dai_link = &eti_b1_dai,
+ .num_links = 1,
+};
+
+static struct wm8731_setup_data eti_b1_wm8731_setup = {
+ .i2c_address = 0x1a,
+};
+
+static struct snd_soc_device eti_b1_snd_devdata = {
+ .machine = &snd_soc_machine_eti_b1,
+ .platform = &at91_soc_platform,
+ .codec_dev = &soc_codec_dev_wm8731,
+ .codec_data = &eti_b1_wm8731_setup,
+};
+
+static struct platform_device *eti_b1_snd_device;
+
+static int __init eti_b1_init(void)
+{
+ int ret;
+ u32 ssc_pio_lines;
+ struct at91_ssc_periph *ssc = eti_b1_dai.cpu_dai->private_data;
+
+ if (!request_mem_region(AT91RM9200_BASE_SSC1, SZ_16K, "soc-audio")) {
+ DBG("SSC1 memory region is busy\n");
+ return -EBUSY;
+ }
+
+ ssc->base = ioremap(AT91RM9200_BASE_SSC1, SZ_16K);
+ if (!ssc->base) {
+ DBG("SSC1 memory ioremap failed\n");
+ ret = -ENOMEM;
+ goto fail_release_mem;
+ }
+
+ ssc->pid = AT91RM9200_ID_SSC1;
+
+ eti_b1_snd_device = platform_device_alloc("soc-audio", -1);
+ if (!eti_b1_snd_device) {
+ DBG("platform device allocation failed\n");
+ ret = -ENOMEM;
+ goto fail_io_unmap;
+ }
+
+ platform_set_drvdata(eti_b1_snd_device, &eti_b1_snd_devdata);
+ eti_b1_snd_devdata.dev = &eti_b1_snd_device->dev;
+
+ ret = platform_device_add(eti_b1_snd_device);
+ if (ret) {
+ DBG("platform device add failed\n");
+ platform_device_put(eti_b1_snd_device);
+ goto fail_io_unmap;
+ }
+
+ ssc_pio_lines = AT91_PIO_TF1 | AT91_PIO_TK1 | AT91_PIO_TD1
+ | AT91_PIO_RD1 /* | AT91_PIO_RK1 */ | AT91_PIO_RF1;
+
+ /* Reset all PIO registers and assign lines to peripheral A */
+ at91_sys_write(AT91_PIOB + PIO_PDR, ssc_pio_lines);
+ at91_sys_write(AT91_PIOB + PIO_ODR, ssc_pio_lines);
+ at91_sys_write(AT91_PIOB + PIO_IFDR, ssc_pio_lines);
+ at91_sys_write(AT91_PIOB + PIO_CODR, ssc_pio_lines);
+ at91_sys_write(AT91_PIOB + PIO_IDR, ssc_pio_lines);
+ at91_sys_write(AT91_PIOB + PIO_MDDR, ssc_pio_lines);
+ at91_sys_write(AT91_PIOB + PIO_PUDR, ssc_pio_lines);
+ at91_sys_write(AT91_PIOB + PIO_ASR, ssc_pio_lines);
+ at91_sys_write(AT91_PIOB + PIO_OWDR, ssc_pio_lines);
+
+ /*
+ * Set PCK1 parent to PLLB and its rate to 12 Mhz.
+ */
+ pllb_clk = clk_get(NULL, "pllb");
+ pck1_clk = clk_get(NULL, "pck1");
+
+ clk_set_parent(pck1_clk, pllb_clk);
+ clk_set_rate(pck1_clk, 12000000);
+
+ DBG("MCLK rate %luHz\n", clk_get_rate(pck1_clk));
+
+ /* assign the GPIO pin to PCK1 */
+ at91_set_B_periph(AT91_PIN_PA24, 0);
+
+#ifdef CONFIG_SND_AT91_SOC_ETI_SLAVE
+ printk(KERN_INFO "eti_b1_wm8731: Codec in Slave Mode\n");
+#else
+ printk(KERN_INFO "eti_b1_wm8731: Codec in Master Mode\n");
+#endif
+ return ret;
+
+fail_io_unmap:
+ iounmap(ssc->base);
+fail_release_mem:
+ release_mem_region(AT91RM9200_BASE_SSC1, SZ_16K);
+ return ret;
+}
+
+static void __exit eti_b1_exit(void)
+{
+ struct at91_ssc_periph *ssc = eti_b1_dai.cpu_dai->private_data;
+
+ clk_put(pck1_clk);
+ clk_put(pllb_clk);
+
+ platform_device_unregister(eti_b1_snd_device);
+
+ iounmap(ssc->base);
+ release_mem_region(AT91RM9200_BASE_SSC1, SZ_16K);
+}
+
+module_init(eti_b1_init);
+module_exit(eti_b1_exit);
+
+/* Module information */
+MODULE_AUTHOR("Frank Mandarino <fmandarino@endrelia.com>");
+MODULE_DESCRIPTION("ALSA SoC ETI-B1-WM8731");
+MODULE_LICENSE("GPL");
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