From ab3f5c1fc21e07896aca4f3a1552197565b72003 Mon Sep 17 00:00:00 2001 From: Ido Yariv Date: Thu, 4 Aug 2011 10:51:23 +0300 Subject: ARM: davinci: AM18x: Add wl1271/wlan support The wl1271 daughter card for AM18x EVMs is a combo wireless connectivity add-on card, based on the LS Research TiWi module with Texas Instruments' wl1271 solution. It is a 4-wire, 1.8V, embedded SDIO WLAN device with an external IRQ line and is power-controlled by a GPIO-based fixed regulator. Add support for the WLAN capabilities of this expansion board. Signed-off-by: Ido Yariv Signed-off-by: Sekhar Nori --- arch/arm/mach-davinci/Kconfig | 10 +++ arch/arm/mach-davinci/board-da850-evm.c | 114 ++++++++++++++++++++++++++++++++ 2 files changed, 124 insertions(+) (limited to 'arch/arm/mach-davinci') diff --git a/arch/arm/mach-davinci/Kconfig b/arch/arm/mach-davinci/Kconfig index c0deaca..32d837d 100644 --- a/arch/arm/mach-davinci/Kconfig +++ b/arch/arm/mach-davinci/Kconfig @@ -192,6 +192,16 @@ config DA850_UI_RMII endchoice +config DA850_WL12XX + bool "AM18x wl1271 daughter board" + depends on MACH_DAVINCI_DA850_EVM + help + The wl1271 daughter card for AM18x EVMs is a combo wireless + connectivity add-on card, based on the LS Research TiWi module with + Texas Instruments' wl1271 solution. + Say Y if you want to use a wl1271 expansion card connected to the + AM18x EVM. + config GPIO_PCA953X default MACH_DAVINCI_DA850_EVM diff --git a/arch/arm/mach-davinci/board-da850-evm.c b/arch/arm/mach-davinci/board-da850-evm.c index 008d514..cb7a1f0 100644 --- a/arch/arm/mach-davinci/board-da850-evm.c +++ b/arch/arm/mach-davinci/board-da850-evm.c @@ -31,6 +31,8 @@ #include #include #include +#include +#include #include #include @@ -49,6 +51,9 @@ #define DA850_MMCSD_CD_PIN GPIO_TO_PIN(4, 0) #define DA850_MMCSD_WP_PIN GPIO_TO_PIN(4, 1) +#define DA850_WLAN_EN GPIO_TO_PIN(6, 9) +#define DA850_WLAN_IRQ GPIO_TO_PIN(6, 10) + #define DA850_MII_MDIO_CLKEN_PIN GPIO_TO_PIN(2, 6) static struct mtd_partition da850evm_spiflash_part[] = { @@ -1143,6 +1148,110 @@ static __init int da850_evm_init_cpufreq(void) static __init int da850_evm_init_cpufreq(void) { return 0; } #endif +#ifdef CONFIG_DA850_WL12XX + +static void wl12xx_set_power(int index, bool power_on) +{ + static bool power_state; + + pr_debug("Powering %s wl12xx", power_on ? "on" : "off"); + + if (power_on == power_state) + return; + power_state = power_on; + + if (power_on) { + /* Power up sequence required for wl127x devices */ + gpio_set_value(DA850_WLAN_EN, 1); + usleep_range(15000, 15000); + gpio_set_value(DA850_WLAN_EN, 0); + usleep_range(1000, 1000); + gpio_set_value(DA850_WLAN_EN, 1); + msleep(70); + } else { + gpio_set_value(DA850_WLAN_EN, 0); + } +} + +static struct davinci_mmc_config da850_wl12xx_mmc_config = { + .set_power = wl12xx_set_power, + .wires = 4, + .max_freq = 25000000, + .caps = MMC_CAP_4_BIT_DATA | MMC_CAP_NONREMOVABLE | + MMC_CAP_POWER_OFF_CARD, + .version = MMC_CTLR_VERSION_2, +}; + +static const short da850_wl12xx_pins[] __initconst = { + DA850_MMCSD1_DAT_0, DA850_MMCSD1_DAT_1, DA850_MMCSD1_DAT_2, + DA850_MMCSD1_DAT_3, DA850_MMCSD1_CLK, DA850_MMCSD1_CMD, + DA850_GPIO6_9, DA850_GPIO6_10, + -1 +}; + +static struct wl12xx_platform_data da850_wl12xx_wlan_data __initdata = { + .irq = -1, + .board_ref_clock = WL12XX_REFCLOCK_38, + .platform_quirks = WL12XX_PLATFORM_QUIRK_EDGE_IRQ, +}; + +static __init int da850_wl12xx_init(void) +{ + int ret; + + ret = davinci_cfg_reg_list(da850_wl12xx_pins); + if (ret) { + pr_err("wl12xx/mmc mux setup failed: %d\n", ret); + goto exit; + } + + ret = da850_register_mmcsd1(&da850_wl12xx_mmc_config); + if (ret) { + pr_err("wl12xx/mmc registration failed: %d\n", ret); + goto exit; + } + + ret = gpio_request_one(DA850_WLAN_EN, GPIOF_OUT_INIT_LOW, "wl12xx_en"); + if (ret) { + pr_err("Could not request wl12xx enable gpio: %d\n", ret); + goto exit; + } + + ret = gpio_request_one(DA850_WLAN_IRQ, GPIOF_IN, "wl12xx_irq"); + if (ret) { + pr_err("Could not request wl12xx irq gpio: %d\n", ret); + goto free_wlan_en; + } + + da850_wl12xx_wlan_data.irq = gpio_to_irq(DA850_WLAN_IRQ); + + ret = wl12xx_set_platform_data(&da850_wl12xx_wlan_data); + if (ret) { + pr_err("Could not set wl12xx data: %d\n", ret); + goto free_wlan_irq; + } + + return 0; + +free_wlan_irq: + gpio_free(DA850_WLAN_IRQ); + +free_wlan_en: + gpio_free(DA850_WLAN_EN); + +exit: + return ret; +} + +#else /* CONFIG_DA850_WL12XX */ + +static __init int da850_wl12xx_init(void) +{ + return 0; +} + +#endif /* CONFIG_DA850_WL12XX */ + #define DA850EVM_SATA_REFCLKPN_RATE (100 * 1000 * 1000) static __init void da850_evm_init(void) @@ -1197,6 +1306,11 @@ static __init void da850_evm_init(void) if (ret) pr_warning("da850_evm_init: mmcsd0 registration failed:" " %d\n", ret); + + ret = da850_wl12xx_init(); + if (ret) + pr_warning("da850_evm_init: wl12xx initialization" + " failed: %d\n", ret); } davinci_serial_init(&da850_evm_uart_config); -- cgit v1.1