[ALSA] ASoC AT91RM92000 eti_b1 machine support

This patch adds support for the Endrelia ETI_B1 machine using the WM8731
codec and the AT91RM9200 platform.

Signed-off-by: Frank Mandarino <fmandarino@endrelia.com>
Signed-off-by: Liam Girdwood <liam.girdwood@wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

1 files changed, 230 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 000000000000..d955cacf2d0d
--- /dev/null
+++ b/sound/soc/at91/eti_b1_wm8731.c
@@ -0,0 +1,230 @@
+/*
+ * eti_b1_wm8731  --  SoC audio for Endrelia ETI_B1.
+ *
+ * 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.
+ *
+ *  Revision history
+ *    30th Nov 2005   Initial 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/at91rm9200.h>
+#include <asm/arch/gpio.h>
+#include <asm/arch/hardware.h>
+
+#include "../codecs/wm8731.h"
+#include "at91rm9200-pcm.h"
+
+#if 0
+#define DBG(x...)       printk(KERN_INFO "eti_b1_wm8731:" x)
+#else
+#define DBG(x...)
+#endif
+
+static struct clk *pck1_clk;
+static struct clk *pllb_clk;
+
+static int eti_b1_startup(snd_pcm_substream_t *substream)
+{
+        /* Start PCK1 clock. */
+        clk_enable(pck1_clk);
+        DBG("pck1 started\n");
+
+        return 0;
+}
+
+static void eti_b1_shutdown(snd_pcm_substream_t *substream)
+{
+        /* Stop PCK1 clock. */
+        clk_disable(pck1_clk);
+        DBG("pck1 stopped\n");
+}
+
+static struct snd_soc_ops eti_b1_ops = {
+        .startup = eti_b1_startup,
+        .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;
+}
+
+unsigned int eti_b1_config_sysclk(struct snd_soc_pcm_runtime *rtd,
+        struct snd_soc_clock_info *info)
+{
+        if(info->bclk_master & SND_SOC_DAIFMT_CBS_CFS) {
+                return rtd->codec_dai->config_sysclk(rtd->codec_dai, info, 12000000);
+        }
+        return 0;
+}
+
+static struct snd_soc_dai_link eti_b1_dai = {
+        .name = "WM8731",
+        .stream_name = "WM8731",
+        .cpu_dai = &at91rm9200_i2s_dai[1],
+        .codec_dai = &wm8731_dai,
+        .init = eti_b1_wm8731_init,
+        .config_sysclk = eti_b1_config_sysclk,
+};
+
+static struct snd_soc_machine snd_soc_machine_eti_b1 = {
+        .name = "ETI_B1",
+        .dai_link = &eti_b1_dai,
+        .num_links = 1,
+        .ops = &eti_b1_ops,
+};
+
+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 = &at91rm9200_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;
+
+        eti_b1_snd_device = platform_device_alloc("soc-audio", -1);
+        if (!eti_b1_snd_device)
+                return -ENOMEM;
+
+        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) {
+                platform_device_put(eti_b1_snd_device);
+                return ret;
+        }
+
+        ssc_pio_lines = AT91_PB6_TF1 | AT91_PB7_TK1 | AT91_PB8_TD1
+                        | AT91_PB9_RD1 /* | AT91_PB10_RK1 | AT91_PB11_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);
+
+        return ret;
+}
+
+static void __exit eti_b1_exit(void)
+{
+        clk_put(pck1_clk);
+        clk_put(pllb_clk);
+
+        platform_device_unregister(eti_b1_snd_device);
+}
+
+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");