1 files changed, 167 insertions, 0 deletions

diff --git a/arch/arm/mach-mx5/board-mx51_babbage.c b/arch/arm/mach-mx5/board-mx51_babbage.c
index ee67a71db80d..ed885f9d7b73 100644
--- a/arch/arm/mach-mx5/board-mx51_babbage.c
+++ b/arch/arm/mach-mx5/board-mx51_babbage.c
@@ -12,11 +12,16 @@
 
 #include <linux/init.h>
 #include <linux/platform_device.h>
+#include <linux/gpio.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/fsl_devices.h>
 
 #include <mach/common.h>
 #include <mach/hardware.h>
 #include <mach/imx-uart.h>
 #include <mach/iomux-mx51.h>
+#include <mach/mxc_ehci.h>
 
 #include <asm/irq.h>
 #include <asm/setup.h>
@@ -26,6 +31,18 @@
 
 #include "devices.h"
 
+#define BABBAGE_USB_HUB_RESET   (0*32 + 7)      /* GPIO_1_7 */
+#define BABBAGE_USBH1_STP       (0*32 + 27)     /* GPIO_1_27 */
+#define BABBAGE_PHY_RESET (1*32 +5)     /* GPIO_2_5 */
+
+/* USB_CTRL_1 */
+#define MX51_USB_CTRL_1_OFFSET                  0x10
+#define MX51_USB_CTRL_UH1_EXT_CLK_EN            (1 << 25)
+
+#define MX51_USB_PLLDIV_12_MHZ          0x00
+#define MX51_USB_PLL_DIV_19_2_MHZ       0x01
+#define MX51_USB_PLL_DIV_24_MHZ 0x02
+
 static struct platform_device *devices[] __initdata = {
         &mxc_fec_device,
 };
@@ -46,6 +63,22 @@ static struct pad_desc mx51babbage_pads[] = {
         MX51_PAD_EIM_D26__UART3_TXD,
         MX51_PAD_EIM_D27__UART3_RTS,
         MX51_PAD_EIM_D24__UART3_CTS,
+
+        /* USB HOST1 */
+        MX51_PAD_USBH1_CLK__USBH1_CLK,
+        MX51_PAD_USBH1_DIR__USBH1_DIR,
+        MX51_PAD_USBH1_NXT__USBH1_NXT,
+        MX51_PAD_USBH1_DATA0__USBH1_DATA0,
+        MX51_PAD_USBH1_DATA1__USBH1_DATA1,
+        MX51_PAD_USBH1_DATA2__USBH1_DATA2,
+        MX51_PAD_USBH1_DATA3__USBH1_DATA3,
+        MX51_PAD_USBH1_DATA4__USBH1_DATA4,
+        MX51_PAD_USBH1_DATA5__USBH1_DATA5,
+        MX51_PAD_USBH1_DATA6__USBH1_DATA6,
+        MX51_PAD_USBH1_DATA7__USBH1_DATA7,
+
+        /* USB HUB reset line*/
+        MX51_PAD_GPIO_1_7__GPIO1_7,
 };
 
 /* Serial ports */
@@ -66,15 +99,149 @@ static inline void mxc_init_imx_uart(void)
 }
 #endif /* SERIAL_IMX */
 
+static int gpio_usbh1_active(void)
+{
+        struct pad_desc usbh1stp_gpio = MX51_PAD_USBH1_STP__GPIO_1_27;
+        struct pad_desc phyreset_gpio = MX51_PAD_EIM_D21__GPIO_2_5;
+        int ret;
+
+        /* Set USBH1_STP to GPIO and toggle it */
+        mxc_iomux_v3_setup_pad(&usbh1stp_gpio);
+        ret = gpio_request(BABBAGE_USBH1_STP, "usbh1_stp");
+
+        if (ret) {
+                pr_debug("failed to get MX51_PAD_USBH1_STP__GPIO_1_27: %d\n", ret);
+                return ret;
+        }
+        gpio_direction_output(BABBAGE_USBH1_STP, 0);
+        gpio_set_value(BABBAGE_USBH1_STP, 1);
+        msleep(100);
+        gpio_free(BABBAGE_USBH1_STP);
+
+        /* De-assert USB PHY RESETB */
+        mxc_iomux_v3_setup_pad(&phyreset_gpio);
+        ret = gpio_request(BABBAGE_PHY_RESET, "phy_reset");
+
+        if (ret) {
+                pr_debug("failed to get MX51_PAD_EIM_D21__GPIO_2_5: %d\n", ret);
+                return ret;
+        }
+        gpio_direction_output(BABBAGE_PHY_RESET, 1);
+        return 0;
+}
+
+static inline void babbage_usbhub_reset(void)
+{
+        int ret;
+
+        /* Bring USB hub out of reset */
+        ret = gpio_request(BABBAGE_USB_HUB_RESET, "GPIO1_7");
+        if (ret) {
+                printk(KERN_ERR"failed to get GPIO_USB_HUB_RESET: %d\n", ret);
+                return;
+        }
+        gpio_direction_output(BABBAGE_USB_HUB_RESET, 0);
+
+        /* USB HUB RESET - De-assert USB HUB RESET_N */
+        msleep(1);
+        gpio_set_value(BABBAGE_USB_HUB_RESET, 0);
+        msleep(1);
+        gpio_set_value(BABBAGE_USB_HUB_RESET, 1);
+}
+
+/* This function is board specific as the bit mask for the plldiv will also
+be different for other Freescale SoCs, thus a common bitmask is not
+possible and cannot get place in /plat-mxc/ehci.c.*/
+static int initialize_otg_port(struct platform_device *pdev)
+{
+        u32 v;
+        void __iomem *usb_base;
+        u32 usbother_base;
+
+        usb_base = ioremap(MX51_OTG_BASE_ADDR, SZ_4K);
+        usbother_base = usb_base + MX5_USBOTHER_REGS_OFFSET;
+
+        /* Set the PHY clock to 19.2MHz */
+        v = __raw_readl(usbother_base + MXC_USB_PHY_CTR_FUNC2_OFFSET);
+        v &= ~MX5_USB_UTMI_PHYCTRL1_PLLDIV_MASK;
+        v |= MX51_USB_PLL_DIV_19_2_MHZ;
+        __raw_writel(v, usbother_base + MXC_USB_PHY_CTR_FUNC2_OFFSET);
+        iounmap(usb_base);
+        return 0;
+}
+
+static int initialize_usbh1_port(struct platform_device *pdev)
+{
+        u32 v;
+        void __iomem *usb_base;
+        u32 usbother_base;
+
+        usb_base = ioremap(MX51_OTG_BASE_ADDR, SZ_4K);
+        usbother_base = usb_base + MX5_USBOTHER_REGS_OFFSET;
+
+        /* The clock for the USBH1 ULPI port will come externally from the PHY. */
+        v = __raw_readl(usbother_base + MX51_USB_CTRL_1_OFFSET);
+        __raw_writel(v | MX51_USB_CTRL_UH1_EXT_CLK_EN, usbother_base + MX51_USB_CTRL_1_OFFSET);
+        iounmap(usb_base);
+        return 0;
+}
+
+static struct mxc_usbh_platform_data dr_utmi_config = {
+        .init           = initialize_otg_port,
+        .portsc = MXC_EHCI_UTMI_16BIT,
+        .flags  = MXC_EHCI_INTERNAL_PHY,
+};
+
+static struct fsl_usb2_platform_data usb_pdata = {
+        .operating_mode = FSL_USB2_DR_DEVICE,
+        .phy_mode       = FSL_USB2_PHY_UTMI_WIDE,
+};
+
+static struct mxc_usbh_platform_data usbh1_config = {
+        .init           = initialize_usbh1_port,
+        .portsc = MXC_EHCI_MODE_ULPI,
+        .flags  = (MXC_EHCI_POWER_PINS_ENABLED | MXC_EHCI_ITC_NO_THRESHOLD),
+};
+
+static int otg_mode_host;
+
+static int __init babbage_otg_mode(char *options)
+{
+        if (!strcmp(options, "host"))
+                otg_mode_host = 1;
+        else if (!strcmp(options, "device"))
+                otg_mode_host = 0;
+        else
+                pr_info("otg_mode neither \"host\" nor \"device\". "
+                        "Defaulting to device\n");
+        return 0;
+}
+__setup("otg_mode=", babbage_otg_mode);
+
 /*
  * Board specific initialization.
  */
 static void __init mxc_board_init(void)
 {
+        struct pad_desc usbh1stp = MX51_PAD_USBH1_STP__USBH1_STP;
+
         mxc_iomux_v3_setup_multiple_pads(mx51babbage_pads,
                                         ARRAY_SIZE(mx51babbage_pads));
         mxc_init_imx_uart();
         platform_add_devices(devices, ARRAY_SIZE(devices));
+
+        if (otg_mode_host)
+                mxc_register_device(&mxc_usbdr_host_device, &dr_utmi_config);
+        else {
+                initialize_otg_port(NULL);
+                mxc_register_device(&mxc_usbdr_udc_device, &usb_pdata);
+        }
+
+        gpio_usbh1_active();
+        mxc_register_device(&mxc_usbh1_device, &usbh1_config);
+        /* setback USBH1_STP to be function */
+        mxc_iomux_v3_setup_pad(&usbh1stp);
+        babbage_usbhub_reset();
 }
 
 static void __init mx51_babbage_timer_init(void)