[PATCH 1/3] mx31moboard: Fix usb PHY reset

[Philippe Rétornaz]

Setup the pad with correct pull-up/down before doing the reset.
Assert the PHY enable signal so the reset is really done.

Signed-off-by: Philippe Rétornaz <philippe.retornaz at epfl.ch>
---
 arch/arm/mach-mx3/mach-mx31moboard.c |   98 +++++++++++++---------------------
 1 files changed, 37 insertions(+), 61 deletions(-)

diff --git a/arch/arm/mach-mx3/mach-mx31moboard.c b/arch/arm/mach-mx3/mach-mx31moboard.c
index fccb920..5c44489 100644
--- a/arch/arm/mach-mx3/mach-mx31moboard.c
+++ b/arch/arm/mach-mx3/mach-mx31moboard.c
@@ -306,37 +306,51 @@ static struct imxmmc_platform_data sdhc1_pdata = {
  * this pin is dedicated for all mx31moboard systems, so we do it here
  */
 #define USB_RESET_B	IOMUX_TO_GPIO(MX31_PIN_GPIO1_0)
-
-static void usb_xcvr_reset(void)
-{
-	gpio_request(USB_RESET_B, "usb-reset");
-	gpio_direction_output(USB_RESET_B, 0);
-	mdelay(1);
-	gpio_set_value(USB_RESET_B, 1);
-}
-
 #define USB_PAD_CFG (PAD_CTL_DRV_MAX | PAD_CTL_SRE_FAST | PAD_CTL_HYS_CMOS | \
-			PAD_CTL_ODE_CMOS | PAD_CTL_100K_PU)
+		      PAD_CTL_ODE_CMOS)
 
 #define OTG_EN_B IOMUX_TO_GPIO(MX31_PIN_USB_OC)
+#define USBH2_EN_B IOMUX_TO_GPIO(MX31_PIN_SCK6)
 
-static void moboard_usbotg_init(void)
+static void usb_xcvr_reset(void)
 {
-	mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA0, USB_PAD_CFG);
-	mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA1, USB_PAD_CFG);
-	mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA2, USB_PAD_CFG);
-	mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA3, USB_PAD_CFG);
-	mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA4, USB_PAD_CFG);
-	mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA5, USB_PAD_CFG);
-	mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA6, USB_PAD_CFG);
-	mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA7, USB_PAD_CFG);
-	mxc_iomux_set_pad(MX31_PIN_USBOTG_CLK, USB_PAD_CFG);
-	mxc_iomux_set_pad(MX31_PIN_USBOTG_DIR, USB_PAD_CFG);
-	mxc_iomux_set_pad(MX31_PIN_USBOTG_NXT, USB_PAD_CFG);
-	mxc_iomux_set_pad(MX31_PIN_USBOTG_STP, USB_PAD_CFG);
+	mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA0, USB_PAD_CFG | PAD_CTL_100K_PD);
+	mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA1, USB_PAD_CFG | PAD_CTL_100K_PD);
+	mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA2, USB_PAD_CFG | PAD_CTL_100K_PD);
+	mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA3, USB_PAD_CFG | PAD_CTL_100K_PD);
+	mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA4, USB_PAD_CFG | PAD_CTL_100K_PD);
+	mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA5, USB_PAD_CFG | PAD_CTL_100K_PD);
+	mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA6, USB_PAD_CFG | PAD_CTL_100K_PD);
+	mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA7, USB_PAD_CFG | PAD_CTL_100K_PD);
+	mxc_iomux_set_pad(MX31_PIN_USBOTG_CLK, USB_PAD_CFG | PAD_CTL_100K_PU);
+	mxc_iomux_set_pad(MX31_PIN_USBOTG_DIR, USB_PAD_CFG | PAD_CTL_100K_PU);
+	mxc_iomux_set_pad(MX31_PIN_USBOTG_NXT, USB_PAD_CFG | PAD_CTL_100K_PU);
+	mxc_iomux_set_pad(MX31_PIN_USBOTG_STP, USB_PAD_CFG | PAD_CTL_100K_PU);
+
+	mxc_iomux_set_gpr(MUX_PGP_UH2, true);
+	mxc_iomux_set_pad(MX31_PIN_USBH2_CLK, USB_PAD_CFG | PAD_CTL_100K_PU);
+	mxc_iomux_set_pad(MX31_PIN_USBH2_DIR, USB_PAD_CFG | PAD_CTL_100K_PU);
+	mxc_iomux_set_pad(MX31_PIN_USBH2_NXT, USB_PAD_CFG | PAD_CTL_100K_PU);
+	mxc_iomux_set_pad(MX31_PIN_USBH2_STP, USB_PAD_CFG | PAD_CTL_100K_PU);
+	mxc_iomux_set_pad(MX31_PIN_USBH2_DATA0, USB_PAD_CFG | PAD_CTL_100K_PD);
+	mxc_iomux_set_pad(MX31_PIN_USBH2_DATA1, USB_PAD_CFG | PAD_CTL_100K_PD);
+	mxc_iomux_set_pad(MX31_PIN_SRXD6, USB_PAD_CFG | PAD_CTL_100K_PD);
+	mxc_iomux_set_pad(MX31_PIN_STXD6, USB_PAD_CFG | PAD_CTL_100K_PD);
+	mxc_iomux_set_pad(MX31_PIN_SFS3, USB_PAD_CFG | PAD_CTL_100K_PD);
+	mxc_iomux_set_pad(MX31_PIN_SCK3, USB_PAD_CFG | PAD_CTL_100K_PD);
+	mxc_iomux_set_pad(MX31_PIN_SRXD3, USB_PAD_CFG | PAD_CTL_100K_PD);
+	mxc_iomux_set_pad(MX31_PIN_STXD3, USB_PAD_CFG | PAD_CTL_100K_PD);
 
 	gpio_request(OTG_EN_B, "usb-udc-en");
 	gpio_direction_output(OTG_EN_B, 0);
+	gpio_request(USBH2_EN_B, "usbh2-en");
+	gpio_direction_output(USBH2_EN_B, 0);
+
+	gpio_request(USB_RESET_B, "usb-reset");
+	gpio_direction_output(USB_RESET_B, 0);
+	mdelay(1);
+	gpio_set_value(USB_RESET_B, 1);
+	mdelay(1);
 }
 
 static struct fsl_usb2_platform_data usb_pdata = {
@@ -346,44 +360,7 @@ static struct fsl_usb2_platform_data usb_pdata = {
 
 #if defined(CONFIG_USB_ULPI)
 
-#define USBH2_EN_B IOMUX_TO_GPIO(MX31_PIN_SCK6)
-
-static int moboard_usbh2_hw_init(struct platform_device *pdev)
-{
-	int ret;
-
-	mxc_iomux_set_gpr(MUX_PGP_UH2, true);
-
-	mxc_iomux_set_pad(MX31_PIN_USBH2_CLK, USB_PAD_CFG);
-	mxc_iomux_set_pad(MX31_PIN_USBH2_DIR, USB_PAD_CFG);
-	mxc_iomux_set_pad(MX31_PIN_USBH2_NXT, USB_PAD_CFG);
-	mxc_iomux_set_pad(MX31_PIN_USBH2_STP, USB_PAD_CFG);
-	mxc_iomux_set_pad(MX31_PIN_USBH2_DATA0, USB_PAD_CFG);
-	mxc_iomux_set_pad(MX31_PIN_USBH2_DATA1, USB_PAD_CFG);
-	mxc_iomux_set_pad(MX31_PIN_SRXD6, USB_PAD_CFG);
-	mxc_iomux_set_pad(MX31_PIN_STXD6, USB_PAD_CFG);
-	mxc_iomux_set_pad(MX31_PIN_SFS3, USB_PAD_CFG);
-	mxc_iomux_set_pad(MX31_PIN_SCK3, USB_PAD_CFG);
-	mxc_iomux_set_pad(MX31_PIN_SRXD3, USB_PAD_CFG);
-	mxc_iomux_set_pad(MX31_PIN_STXD3, USB_PAD_CFG);
-
-	ret = gpio_request(USBH2_EN_B, "usbh2-en");
-	if (ret)
-		return ret;
-	gpio_direction_output(USBH2_EN_B, 0);
-
-	return 0;
-}
-
-static int moboard_usbh2_hw_exit(struct platform_device *pdev)
-{
-	gpio_free(USBH2_EN_B);
-	return 0;
-}
-
 static struct mxc_usbh_platform_data usbh2_pdata = {
-	.init	= moboard_usbh2_hw_init,
-	.exit	= moboard_usbh2_hw_exit,
 	.portsc	= MXC_EHCI_MODE_ULPI | MXC_EHCI_UTMI_8BIT,
 	.flags	= MXC_EHCI_POWER_PINS_ENABLED,
 };
@@ -508,7 +485,6 @@ static void __init mxc_board_init(void)
 
 	usb_xcvr_reset();
 
-	moboard_usbotg_init();
 	mxc_register_device(&mxc_otg_udc_device, &usb_pdata);
 	moboard_usbh2_init();
 
-- 
1.6.3.3