am335x mmc setup

static struct omap2_hsmmc_info am335x_mmc[] __initdata = {
{
.mmc = 1,
.caps = MMC_CAP_4_BIT_DATA,
.gpio_cd = GPIO_TO_PIN(0, 20),
.gpio_wp = -EINVAL,
.ocr_mask = MMC_VDD_32_33 | MMC_VDD_33_34, /* 3V3 */
},
{
.mmc = 2,
.caps = MMC_CAP_8_BIT_DATA,
.nonremovable = true,
.gpio_cd = -EINVAL,
.gpio_wp = -EINVAL,
.ocr_mask = MMC_VDD_32_33 | MMC_VDD_33_34, /* 3V3 */
},
{
.mmc = 3,
.name = "wl1271",
.caps = MMC_CAP_4_BIT_DATA | MMC_CAP_POWER_OFF_CARD,
.nonremovable = true,
.gpio_cd = -EINVAL,
.gpio_wp = -EINVAL,
.ocr_mask = MMC_VDD_32_33 | MMC_VDD_33_34, /* 3V3 */
},
{} /* Terminator */
};

#define AM335XEVM_WLAN_IRQ_GPIO GPIO_TO_PIN(1, 25)

struct wl12xx_platform_data am335xevm_wlan_data = {
.irq = OMAP_GPIO_IRQ(AM335XEVM_WLAN_IRQ_GPIO),
.board_ref_clock = WL12XX_REFCLOCK_38_XTAL, /* 38.4Mhz */
.bt_enable_gpio = GPIO_TO_PIN(1, 24),
.wlan_enable_gpio = GPIO_TO_PIN(1, 23),
};

/* Module pin mux for wlan */

static struct pinmux_config mmc2_wl12xx_pin_mux[] = {
{"gpmc_a1.mmc2_dat0", OMAP_MUX_MODE3 | AM33XX_PIN_INPUT_PULLUP},
{"gpmc_a2.mmc2_dat1", OMAP_MUX_MODE3 | AM33XX_PIN_INPUT_PULLUP},
{"gpmc_a3.mmc2_dat2", OMAP_MUX_MODE3 | AM33XX_PIN_INPUT_PULLUP},
{"gpmc_ben1.mmc2_dat3", OMAP_MUX_MODE3 | AM33XX_PIN_INPUT_PULLUP},
{"gpmc_csn3.mmc2_cmd", OMAP_MUX_MODE3 | AM33XX_PIN_INPUT_PULLUP},
{"gpmc_clk.mmc2_clk", OMAP_MUX_MODE3 | AM33XX_PIN_INPUT_PULLUP},
{NULL, 0},
};

static struct pinmux_config wl12xx_pin_mux[] = {
{"gpmc_a7.gpio1_23", OMAP_MUX_MODE7 | AM33XX_PIN_OUTPUT_PULLUP}, // wlan enable... note:added pullup
{"gpmc_a9.gpio1_25", OMAP_MUX_MODE7 | AM33XX_PIN_INPUT}, // wlan irq
{"gpmc_a8.gpio1_24", OMAP_MUX_MODE7 | AM33XX_PIN_OUTPUT}, // BT enable
// note: got rid of pull up on BT
{NULL, 0},
};

static void wl12xx_bluetooth_enable(void)
{
int status = gpio_request(am335xevm_wlan_data.bt_enable_gpio, "bt_en");
if (status < 0)
pr_err("Failed to request gpio for bt_enable");

pr_info("Configure Bluetooth Enable pin...\n");
gpio_direction_output(am335xevm_wlan_data.bt_enable_gpio, 0);
}

static int wl12xx_set_power(struct device *dev, int slot, int on, int vdd)
{
if (on) {
gpio_direction_output(am335xevm_wlan_data.wlan_enable_gpio, 1);

mdelay(70);
} else {
gpio_direction_output(am335xevm_wlan_data.wlan_enable_gpio, 0);
}

return 0;
}

static void wl12xx_init(void)
{
struct device *dev;
struct omap_mmc_platform_data *pdata;
int ret;

setup_pin_mux(wl12xx_pin_mux);
am335xevm_wlan_data.platform_quirks = WL12XX_PLATFORM_QUIRK_EDGE_IRQ;
wl12xx_bluetooth_enable();

if (wl12xx_set_platform_data(&am335xevm_wlan_data))
pr_err("error setting wl12xx data\n");

dev = am335x_mmc[2].dev;
if (!dev) {
pr_err("wl12xx mmc device initialization failed\n");
goto out;
}

pdata = dev->platform_data;
if (!pdata) {
pr_err("Platfrom data of wl12xx device not set\n");
goto out;
}

ret = gpio_request_one(am335xevm_wlan_data.wlan_enable_gpio,GPIOF_OUT_INIT_HIGH, "wlan_en");
if (ret) {
pr_err("Error requesting wlan enable gpio: %d\n", ret);
goto out;
}

pdata->slots[0].set_power = wl12xx_set_power;
out:
return;
}

static void mmc_init(void)
{
setup_pin_mux(mmc0_pin_mux);
setup_pin_mux(mmc1_pin_mux);
setup_pin_mux(mmc2_wl12xx_pin_mux);

omap2_hsmmc_init(am335x_mmc);
return;
}

/* Called as part of board initialization, defined in MACHINE_START */
static void __init am335x_evm_init(void)
{
...

pr_info("mmc_init()\n");
mmc_init();

pr_info("wl12xx_init()\n");
wl12xx_init();

....

Have you checked this post: http://e2e.ti.com/support/arm/sitara_arm/f/791/p/245394/1207567.aspx#1207567

Biser,

Thank you.. Yes I have checked out that post.  I have implimented the changes to the hsmmc.c and ompa_hwmod_3xx_data.c and have had no better results.

question:  I have hooked up the scope to clock, cmd, and dat0.  I see what looks like SPI traffice on clock and cmd and nothing at all on dat0.  Am I right to assume that the SDIO/MMC interface does not recognize the WL12XX module since it never tries to talk over dat0?

When I type: ifup wlan0
Successfully initialized wpa_supplicant
Could not set interface wlan0 flags: Cannot assign requested address
WEXT: Could not set interface 'wlan0' UP
wlan0: Failed to initialize driver interface
ifconfig: SIOCSIFFLAGS: Cannot assign requested address

Is this more evidence that I am not getting very far in the init process?

Thanks,

Chuck

Hi Chuck,

I'm afraid I cannot help much more on this. It seems that your communication with the WLAN module is failing. Maybe you should ask for support on the WiFi forum: http://e2e.ti.com/support/wireless_connectivity/f/307.aspx

Biser,

Let me limit my question to the MMC only then, ignoring, for the time being, the Wl12XX module. 

How do I verify correct behavior of the MMC on the AM335x?

Steps taken so far:

1) verified pin mux settings.

2) verified mmc driver set up a la: http://e2e.ti.com/support/arm/sitara_arm/f/791/p/245394/1207567.aspx#1207567

and: http://e2e.ti.com/support/wireless_connectivity/f/307/p/164162/729299.aspx#729299

What else can I check?  What are the sw tools that I can use to tickle the MMC and verify its correct behavior?

Thank you,

Chuck

From what you posted before it seems to me that the MMC driver is working, since it's trying to establish communication. I suggested the other forum to you, because I don't know how SDIO is supported over the MMC. It seems to me that the WLAN responds over the interface with something that the basic SD/MMC driver does not understand.