From d2831d1f543489ef97a20e6e65f625e195b521bf Mon Sep 17 00:00:00 2001 From: Sascha Hauer Date: Tue, 9 Feb 2010 11:04:36 +0100 Subject: [PATCH] i.MX pcm043: Add AC97 sound support Signed-off-by: Sascha Hauer --- arch/arm/mach-mx3/mach-pcm043.c | 101 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 101 insertions(+) diff --git a/arch/arm/mach-mx3/mach-pcm043.c b/arch/arm/mach-mx3/mach-pcm043.c index a9741c2..1bf1ec2 100644 --- a/arch/arm/mach-mx3/mach-pcm043.c +++ b/arch/arm/mach-mx3/mach-pcm043.c @@ -26,6 +26,7 @@ #include #include #include +#include #include #include #include @@ -49,6 +50,8 @@ #include #include #include +#include +#include #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); -- 2.7.4