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Commit ab3f5c1f authored by Ido Yariv's avatar Ido Yariv Committed by Sekhar Nori
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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: default avatarIdo Yariv <ido@wizery.com>
Signed-off-by: default avatarSekhar Nori <nsekhar@ti.com>
parent 4a9de8ad

arch/arm/mach-davinci/Kconfig

+10 −0
Original line number Diff line number Diff line
@@ -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

arch/arm/mach-davinci/board-da850-evm.c

+114 −0
Original line number Diff line number Diff line
@@ -31,6 +31,8 @@ 
#include <linux/input/tps6507x-ts.h>

#include <linux/spi/spi.h>

#include <linux/spi/flash.h>

#include <linux/delay.h>

#include <linux/wl12xx.h>



#include <asm/mach-types.h>

#include <asm/mach/arch.h>
@@ -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);