omap: pandora: add support for wl1251 wifi chip

Define platform data and setup GPIOs so that TI wl1251 wifi chip
and it's driver can function.

Signed-off-by: Grazvydas Ignotas <notasas@gmail.com>

diff --git a/arch/arm/mach-omap2/board-omap3pandora.c b/arch/arm/mach-omap2/board-omap3pandora.c
index db06dc9..3b34f58 100644 (file)
--- a/arch/arm/mach-omap2/board-omap3pandora.c
+++ b/arch/arm/mach-omap2/board-omap3pandora.c
@@ -29,6 +29,7 @@
 #include <linux/input.h>
 #include <linux/input/matrix_keypad.h>
 #include <linux/gpio_keys.h>
 #include <linux/input.h>
 #include <linux/input/matrix_keypad.h>
 #include <linux/gpio_keys.h>

+#include <linux/spi/wl12xx.h>

 
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
 
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>


@@ -46,6 +47,8 @@
 #include "sdram-micron-mt46h32m32lf-6.h"
 #include "hsmmc.h"
 
 #include "sdram-micron-mt46h32m32lf-6.h"
 #include "hsmmc.h"
 

+#define PANDORA_WIFI_IRQ_GPIO          21
+#define PANDORA_WIFI_NRESET_GPIO       23

 #define OMAP3_PANDORA_TS_GPIO          94
 
 /* hardware debounce: (value + 1) * 31us */
 #define OMAP3_PANDORA_TS_GPIO          94
 
 /* hardware debounce: (value + 1) * 31us */


@@ -248,6 +251,7 @@ static struct omap2_hsmmc_info omap3pandora_mmc[] = {
                .wires          = 4,
                .gpio_cd        = -EINVAL,
                .gpio_wp        = -EINVAL,
                .wires          = 4,
                .gpio_cd        = -EINVAL,
                .gpio_wp        = -EINVAL,

+               .ocr_mask       = 0x80, /* MMC_VDD_165_195 */

        },
        {}      /* Terminator */
 };
        },
        {}      /* Terminator */
 };


@@ -255,12 +259,33 @@ static struct omap2_hsmmc_info omap3pandora_mmc[] = {
 static int omap3pandora_twl_gpio_setup(struct device *dev,
                unsigned gpio, unsigned ngpio)
 {
 static int omap3pandora_twl_gpio_setup(struct device *dev,
                unsigned gpio, unsigned ngpio)
 {

+       int ret, gpio_32khz;
+

        /* gpio + {0,1} is "mmc{0,1}_cd" (input/IRQ) */
        omap3pandora_mmc[0].gpio_cd = gpio + 0;
        omap3pandora_mmc[1].gpio_cd = gpio + 1;
        omap2_hsmmc_init(omap3pandora_mmc);
 
        /* gpio + {0,1} is "mmc{0,1}_cd" (input/IRQ) */
        omap3pandora_mmc[0].gpio_cd = gpio + 0;
        omap3pandora_mmc[1].gpio_cd = gpio + 1;
        omap2_hsmmc_init(omap3pandora_mmc);
 

+       /* gpio + 13 drives 32kHz buffer for wifi module */
+       gpio_32khz = gpio + 13;
+       ret = gpio_request(gpio_32khz, "wifi 32kHz");
+       if (ret < 0) {
+               pr_err("Cannot get GPIO line %d, ret=%d\n", gpio_32khz, ret);
+               goto fail;
+       }
+
+       ret = gpio_direction_output(gpio_32khz, 1);
+       if (ret < 0) {
+               pr_err("Cannot set GPIO line %d, ret=%d\n", gpio_32khz, ret);
+               goto fail_direction;
+       }
+

        return 0;
        return 0;

+
+fail_direction:
+       gpio_free(gpio_32khz);
+fail:
+       return -ENODEV;

 }
 
 static struct twl4030_gpio_platform_data omap3pandora_gpio_data = {
 }
 
 static struct twl4030_gpio_platform_data omap3pandora_gpio_data = {


@@ -539,10 +564,67 @@ static void __init omap3pandora_init_irq(void)
        omap_gpio_init();
 }
 
        omap_gpio_init();
 }
 

+static void pandora_wl1251_set_power(bool enable)
+{
+       /*
+        * Keep power always on until wl1251_sdio driver learns to re-init
+        * the chip after powering it down and back up.
+        */
+}
+
+static struct wl12xx_platform_data pandora_wl1251_pdata = {
+       .set_power      = pandora_wl1251_set_power,
+       .use_eeprom     = true,
+};
+
+static struct platform_device pandora_wl1251_data = {
+       .name           = "wl1251_data",
+       .id             = -1,
+       .dev            = {
+               .platform_data  = &pandora_wl1251_pdata,
+       },
+};
+
+static void pandora_wl1251_init(void)
+{
+       int ret;
+
+       ret = gpio_request(PANDORA_WIFI_IRQ_GPIO, "wl1251 irq");
+       if (ret < 0)
+               goto fail;
+
+       ret = gpio_direction_input(PANDORA_WIFI_IRQ_GPIO);
+       if (ret < 0)
+               goto fail_irq;
+
+       pandora_wl1251_pdata.irq = gpio_to_irq(PANDORA_WIFI_IRQ_GPIO);
+       if (pandora_wl1251_pdata.irq < 0)
+               goto fail_irq;
+
+       ret = gpio_request(PANDORA_WIFI_NRESET_GPIO, "wl1251 nreset");
+       if (ret < 0)
+               goto fail_irq;
+
+       /* start powered so that it probes with MMC subsystem */
+       ret = gpio_direction_output(PANDORA_WIFI_NRESET_GPIO, 1);
+       if (ret < 0)
+               goto fail_nreset;
+
+       return;
+
+fail_nreset:
+       gpio_free(PANDORA_WIFI_NRESET_GPIO);
+fail_irq:
+       gpio_free(PANDORA_WIFI_IRQ_GPIO);
+fail:
+       printk(KERN_ERR "wl1251 board initialisation failed\n");
+}
+

 static struct platform_device *omap3pandora_devices[] __initdata = {
        &pandora_leds_gpio,
        &pandora_keys_gpio,
        &pandora_dss_device,
 static struct platform_device *omap3pandora_devices[] __initdata = {
        &pandora_leds_gpio,
        &pandora_keys_gpio,
        &pandora_dss_device,

+       &pandora_wl1251_data,

 };
 
 static const struct ehci_hcd_omap_platform_data ehci_pdata __initconst = {
 };
 
 static const struct ehci_hcd_omap_platform_data ehci_pdata __initconst = {


@@ -575,6 +657,7 @@ static void __init omap3pandora_init(void)
 {
        omap3_mux_init(board_mux, OMAP_PACKAGE_CBB);
        omap3pandora_i2c_init();
 {
        omap3_mux_init(board_mux, OMAP_PACKAGE_CBB);
        omap3pandora_i2c_init();

+       pandora_wl1251_init();

        platform_add_devices(omap3pandora_devices,
                        ARRAY_SIZE(omap3pandora_devices));
        omap_serial_init();
        platform_add_devices(omap3pandora_devices,
                        ARRAY_SIZE(omap3pandora_devices));
        omap_serial_init();