diff options
Diffstat (limited to 'drivers/usb/host/ehci-mx6.c')
| -rw-r--r-- | drivers/usb/host/ehci-mx6.c | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/drivers/usb/host/ehci-mx6.c b/drivers/usb/host/ehci-mx6.c index 48889c19562..18b7fc3c952 100644 --- a/drivers/usb/host/ehci-mx6.c +++ b/drivers/usb/host/ehci-mx6.c @@ -15,10 +15,13 @@ #include <asm/arch/imx-regs.h> #include <asm/arch/clock.h> #include <asm/imx-common/iomux-v3.h> +#include <asm/imx-common/sys_proto.h> #include <dm.h> #include "ehci.h" +DECLARE_GLOBAL_DATA_PTR; + #define USB_OTGREGS_OFFSET 0x000 #define USB_H1REGS_OFFSET 0x200 #define USB_H2REGS_OFFSET 0x400 @@ -48,6 +51,7 @@ #define ANADIG_USB2_PLL_480_CTRL_EN_USB_CLKS 0x00000040 #define USBNC_OFFSET 0x200 +#define USBNC_PHY_STATUS_OFFSET 0x23C #define USBNC_PHYSTATUS_ID_DIG (1 << 4) /* otg_id status */ #define USBNC_PHYCFG2_ACAENB (1 << 4) /* otg_id detection enable */ #define UCTRL_PWR_POL (1 << 9) /* OTG Polarity of Power Pin */ @@ -417,6 +421,76 @@ static const struct ehci_ops mx6_ehci_ops = { .init_after_reset = mx6_init_after_reset }; +static int ehci_usb_phy_mode(struct udevice *dev) +{ + struct usb_platdata *plat = dev_get_platdata(dev); + void *__iomem addr = (void *__iomem)dev_get_addr(dev); + void *__iomem phy_ctrl, *__iomem phy_status; + const void *blob = gd->fdt_blob; + int offset = dev->of_offset, phy_off; + u32 val; + + /* + * About fsl,usbphy, Refer to + * Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt. + */ + if (is_mx6()) { + phy_off = fdtdec_lookup_phandle(blob, + offset, + "fsl,usbphy"); + if (phy_off < 0) + return -EINVAL; + + addr = (void __iomem *)fdtdec_get_addr(blob, phy_off, + "reg"); + if ((fdt_addr_t)addr == FDT_ADDR_T_NONE) + return -EINVAL; + + phy_ctrl = (void __iomem *)(addr + USBPHY_CTRL); + val = readl(phy_ctrl); + + if (val & USBPHY_CTRL_OTG_ID) + plat->init_type = USB_INIT_DEVICE; + else + plat->init_type = USB_INIT_HOST; + } else if (is_mx7()) { + phy_status = (void __iomem *)(addr + + USBNC_PHY_STATUS_OFFSET); + val = readl(phy_status); + + if (val & USBNC_PHYSTATUS_ID_DIG) + plat->init_type = USB_INIT_DEVICE; + else + plat->init_type = USB_INIT_HOST; + } else { + return -EINVAL; + } + + return 0; +} + +static int ehci_usb_ofdata_to_platdata(struct udevice *dev) +{ + struct usb_platdata *plat = dev_get_platdata(dev); + const char *mode; + + mode = fdt_getprop(gd->fdt_blob, dev->of_offset, "dr_mode", NULL); + if (mode) { + if (strcmp(mode, "peripheral") == 0) + plat->init_type = USB_INIT_DEVICE; + else if (strcmp(mode, "host") == 0) + plat->init_type = USB_INIT_HOST; + else if (strcmp(mode, "otg") == 0) + return ehci_usb_phy_mode(dev); + else + return -EINVAL; + + return 0; + } + + return ehci_usb_phy_mode(dev); +} + static int ehci_usb_probe(struct udevice *dev) { struct usb_platdata *plat = dev_get_platdata(dev); @@ -460,6 +534,7 @@ U_BOOT_DRIVER(usb_mx6) = { .name = "ehci_mx6", .id = UCLASS_USB, .of_match = mx6_usb_ids, + .ofdata_to_platdata = ehci_usb_ofdata_to_platdata, .probe = ehci_usb_probe, .remove = ehci_deregister, .ops = &ehci_usb_ops, |