i.MX pcm043: Add AC97 sound support

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

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);