[ALSA] soc - ln2440sbc ac97 support

This patch adds ac97 support for ln2440sbc board from LittleChips.
This board is based on s3c2440 SoC + AC97 Realtek ALC650 codec.
Existing s3c2443 implementation is slightly modified because s3c2440
and s3c2443 have different AC97 interrupts.

Signed-off-by: Ivan Kuten <ivan.kuten@promwad.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

sound/soc/s3c24xx/Kconfig

@@ -34,4 +34,12 @@ config SND_S3C24XX_SOC_SMDK2443_WM9710
 	  Say Y if you want to add support for SoC audio on smdk2443
 	  with the WM9710.
 
+config SND_S3C24XX_SOC_LN2440SBC_ALC650
+	tristate "SoC AC97 Audio support for LN2440SBC - ALC650"
+	depends on SND_S3C24XX_SOC
+	select SND_S3C2443_SOC_AC97
+	select SND_SOC_AC97_CODEC
+	help
+	  Say Y if you want to add support for SoC audio on ln2440sbc
+	  with the ALC650.
 

sound/soc/s3c24xx/Makefile

@@ -10,6 +10,8 @@ obj-$(CONFIG_SND_S3C2443_SOC_AC97) += snd-soc-s3c2443-ac97.o
 # S3C24XX Machine Support
 snd-soc-neo1973-wm8753-objs := neo1973_wm8753.o
 snd-soc-smdk2443-wm9710-objs := smdk2443_wm9710.o
+snd-soc-ln2440sbc-alc650-objs := ln2440sbc_alc650.o
 
 obj-$(CONFIG_SND_S3C24XX_SOC_NEO1973_WM8753) += snd-soc-neo1973-wm8753.o
 obj-$(CONFIG_SND_S3C24XX_SOC_SMDK2443_WM9710) += snd-soc-smdk2443-wm9710.o
+obj-$(CONFIG_SND_S3C24XX_SOC_LN2440SBC_ALC650) += snd-soc-ln2440sbc-alc650.o

sound/soc/s3c24xx/ln2440sbc_alc650.c

@@ -0,0 +1,86 @@
+/*
+ * SoC audio for ln2440sbc
+ * 
+ * Copyright 2007 KonekTel, a.s.
+ * Author: Ivan Kuten
+ *         ivan.kuten@promwad.com
+ * 
+ * Heavily based on smdk2443_wm9710.c
+ * 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 version 2 as
+ *  published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/device.h>
+#include <sound/driver.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/soc.h>
+#include <sound/soc-dapm.h>
+
+#include "../codecs/ac97.h"
+#include "s3c24xx-pcm.h"
+#include "s3c24xx-ac97.h"
+
+static struct snd_soc_machine ln2440sbc;
+
+static struct snd_soc_dai_link ln2440sbc_dai[] = {
+{
+	.name = "AC97",
+	.stream_name = "AC97 HiFi",
+	.cpu_dai = &s3c2443_ac97_dai[0],
+	.codec_dai = &ac97_dai,
+},
+};
+
+static struct snd_soc_machine ln2440sbc = {
+	.name = "LN2440SBC",
+	.dai_link = ln2440sbc_dai,
+	.num_links = ARRAY_SIZE(ln2440sbc_dai),
+};
+
+static struct snd_soc_device ln2440sbc_snd_ac97_devdata = {
+	.machine = &ln2440sbc,
+	.platform = &s3c24xx_soc_platform,
+	.codec_dev = &soc_codec_dev_ac97,
+};
+
+static struct platform_device *ln2440sbc_snd_ac97_device;
+
+static int __init ln2440sbc_init(void)
+{
+	int ret;
+
+	ln2440sbc_snd_ac97_device = platform_device_alloc("soc-audio", -1);
+	if (!ln2440sbc_snd_ac97_device)
+		return -ENOMEM;
+
+	platform_set_drvdata(ln2440sbc_snd_ac97_device,
+				&ln2440sbc_snd_ac97_devdata);
+	ln2440sbc_snd_ac97_devdata.dev = &ln2440sbc_snd_ac97_device->dev;
+	ret = platform_device_add(ln2440sbc_snd_ac97_device);
+
+	if (ret)
+		platform_device_put(ln2440sbc_snd_ac97_device);
+
+	return ret;
+}
+
+static void __exit ln2440sbc_exit(void)
+{
+	platform_device_unregister(ln2440sbc_snd_ac97_device);
+}
+
+module_init(ln2440sbc_init);
+module_exit(ln2440sbc_exit);
+
+/* Module information */
+MODULE_AUTHOR("Ivan Kuten");
+MODULE_DESCRIPTION("ALSA SoC ALC650 LN2440SBC");
+MODULE_LICENSE("GPL");

sound/soc/s3c24xx/s3c2443-ac97.c

@@ -253,7 +253,7 @@ static int s3c2443_ac97_probe(struct platform_device *pdev)
 	ac_glbctrl |= S3C_AC97_GLBCTRL_TRANSFERDATAENABLE;
 	writel(ac_glbctrl, s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
 
-	ret = request_irq(IRQ_S3C2443_AC97, s3c2443_ac97_irq,
+	ret = request_irq(IRQ_S3C244x_AC97, s3c2443_ac97_irq,
 		IRQF_DISABLED, "AC97", NULL);
 	if (ret < 0) {
 		printk(KERN_ERR "s3c24xx-ac97: interrupt request failed.\n");
@@ -266,7 +266,7 @@ static int s3c2443_ac97_probe(struct platform_device *pdev)
 
 static void s3c2443_ac97_remove(struct platform_device *pdev)
 {
-	free_irq(IRQ_S3C2443_AC97, NULL);
+	free_irq(IRQ_S3C244x_AC97, NULL);
 	clk_disable(s3c24xx_ac97.ac97_clk);
 	clk_put(s3c24xx_ac97.ac97_clk);
 	iounmap(s3c24xx_ac97.regs);

sound/soc/s3c24xx/s3c24xx-ac97.h

@@ -20,6 +20,12 @@
 #define AC_CMD_ADDR(x) (x << 16)
 #define AC_CMD_DATA(x) (x & 0xffff)
 
+#ifdef CONFIG_CPU_S3C2440
+#define IRQ_S3C244x_AC97 IRQ_S3C2440_AC97
+#else
+#define IRQ_S3C244x_AC97 IRQ_S3C2443_AC97
+#endif
+
 extern struct snd_soc_cpu_dai s3c2443_ac97_dai[];
 
 #endif /*S3C24XXAC97_H_*/