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authorSascha Hauer <s.hauer@pengutronix.de>2010-02-09 11:04:36 +0100
committerSascha Hauer <s.hauer@pengutronix.de>2010-02-10 11:05:23 +0100
commitd2831d1f543489ef97a20e6e65f625e195b521bf (patch)
tree707886f8f8b764d5fbed12f00a216d25a8831aad /arch/arm/mach-mx3
parentc8a6885f2153087668b64d4ee25f78a7dda1dadb (diff)
i.MX pcm043: Add AC97 sound support
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch/arm/mach-mx3')
-rw-r--r--arch/arm/mach-mx3/mach-pcm043.c101
1 files changed, 101 insertions, 0 deletions
diff --git a/arch/arm/mach-mx3/mach-pcm043.c b/arch/arm/mach-mx3/mach-pcm043.c
index a9741c2b379f..1bf1ec2eef5e 100644
--- a/arch/arm/mach-mx3/mach-pcm043.c
+++ b/arch/arm/mach-mx3/mach-pcm043.c
@@ -26,6 +26,7 @@
#include <linux/gpio.h>
#include <linux/smc911x.h>
#include <linux/interrupt.h>
+#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/i2c/at24.h>
#include <linux/usb/otg.h>
@@ -49,6 +50,8 @@
#include <mach/mxc_nand.h>
#include <mach/mxc_ehci.h>
#include <mach/ulpi.h>
+#include <mach/audmux.h>
+#include <mach/ssi.h>
#include "devices.h"
@@ -213,6 +216,91 @@ static struct pad_desc pcm043_pads[] = {
/* USB host */
MX35_PAD_I2C2_CLK__USB_TOP_USBH2_PWR,
MX35_PAD_I2C2_DAT__USB_TOP_USBH2_OC,
+ /* SSI */
+ MX35_PAD_STXFS4__AUDMUX_AUD4_TXFS,
+ MX35_PAD_STXD4__AUDMUX_AUD4_TXD,
+ MX35_PAD_SRXD4__AUDMUX_AUD4_RXD,
+ MX35_PAD_SCK4__AUDMUX_AUD4_TXC,
+};
+
+#define AC97_GPIO_TXFS (1 * 32 + 31)
+#define AC97_GPIO_TXD (1 * 32 + 28)
+#define AC97_GPIO_RESET (1 * 32 + 0)
+
+static void pcm043_ac97_warm_reset(struct snd_ac97 *ac97)
+{
+ struct pad_desc txfs_gpio = MX35_PAD_STXFS4__GPIO2_31;
+ struct pad_desc txfs = MX35_PAD_STXFS4__AUDMUX_AUD4_TXFS;
+ int ret;
+
+ ret = gpio_request(AC97_GPIO_TXFS, "SSI");
+ if (ret) {
+ printk("failed to get GPIO_TXFS: %d\n", ret);
+ return;
+ }
+
+ mxc_iomux_v3_setup_pad(&txfs_gpio);
+
+ /* warm reset */
+ gpio_direction_output(AC97_GPIO_TXFS, 1);
+ udelay(2);
+ gpio_set_value(AC97_GPIO_TXFS, 0);
+
+ gpio_free(AC97_GPIO_TXFS);
+ mxc_iomux_v3_setup_pad(&txfs);
+}
+
+static void pcm043_ac97_cold_reset(struct snd_ac97 *ac97)
+{
+ struct pad_desc txfs_gpio = MX35_PAD_STXFS4__GPIO2_31;
+ struct pad_desc txfs = MX35_PAD_STXFS4__AUDMUX_AUD4_TXFS;
+ struct pad_desc txd_gpio = MX35_PAD_STXD4__GPIO2_28;
+ struct pad_desc txd = MX35_PAD_STXD4__AUDMUX_AUD4_TXD;
+ struct pad_desc reset_gpio = MX35_PAD_SD2_CMD__GPIO2_0;
+ int ret;
+
+ ret = gpio_request(AC97_GPIO_TXFS, "SSI");
+ if (ret)
+ goto err1;
+
+ ret = gpio_request(AC97_GPIO_TXD, "SSI");
+ if (ret)
+ goto err2;
+
+ ret = gpio_request(AC97_GPIO_RESET, "SSI");
+ if (ret)
+ goto err3;
+
+ mxc_iomux_v3_setup_pad(&txfs_gpio);
+ mxc_iomux_v3_setup_pad(&txd_gpio);
+ mxc_iomux_v3_setup_pad(&reset_gpio);
+
+ gpio_direction_output(AC97_GPIO_TXFS, 0);
+ gpio_direction_output(AC97_GPIO_TXD, 0);
+
+ /* cold reset */
+ gpio_direction_output(AC97_GPIO_RESET, 0);
+ udelay(10);
+ gpio_direction_output(AC97_GPIO_RESET, 1);
+
+ mxc_iomux_v3_setup_pad(&txd);
+ mxc_iomux_v3_setup_pad(&txfs);
+
+ gpio_free(AC97_GPIO_RESET);
+err3:
+ gpio_free(AC97_GPIO_TXD);
+err2:
+ gpio_free(AC97_GPIO_TXFS);
+err1:
+ if (ret)
+ printk("%s failed with %d\n", __func__, ret);
+ mdelay(1);
+}
+
+static struct imx_ssi_platform_data pcm043_ssi_pdata = {
+ .ac97_reset = pcm043_ac97_cold_reset,
+ .ac97_warm_reset = pcm043_ac97_warm_reset,
+ .flags = IMX_SSI_USE_AC97,
};
static struct mxc_nand_platform_data pcm037_nand_board_info = {
@@ -258,10 +346,23 @@ static void __init mxc_board_init(void)
{
mxc_iomux_v3_setup_multiple_pads(pcm043_pads, ARRAY_SIZE(pcm043_pads));
+ mxc_audmux_v2_configure_port(3,
+ MXC_AUDMUX_V2_PTCR_SYN | /* 4wire mode */
+ MXC_AUDMUX_V2_PTCR_TFSEL(0) |
+ MXC_AUDMUX_V2_PTCR_TFSDIR,
+ MXC_AUDMUX_V2_PDCR_RXDSEL(0));
+
+ mxc_audmux_v2_configure_port(0,
+ MXC_AUDMUX_V2_PTCR_SYN | /* 4wire mode */
+ MXC_AUDMUX_V2_PTCR_TCSEL(3) |
+ MXC_AUDMUX_V2_PTCR_TCLKDIR, /* clock is output */
+ MXC_AUDMUX_V2_PDCR_RXDSEL(3));
+
platform_add_devices(devices, ARRAY_SIZE(devices));
mxc_register_device(&mxc_uart_device0, &uart_pdata);
mxc_register_device(&mxc_nand_device, &pcm037_nand_board_info);
+ mxc_register_device(&imx_ssi_device0, &pcm043_ssi_pdata);
mxc_register_device(&mxc_uart_device1, &uart_pdata);