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usb: ehci-mx6: implement ofdata_to_platdata 

Implement ofdata_to_platdata to set the type to host or device.
 - Check "dr-mode" property.
 - If there is no "dr-mode", check phy_ctrl for i.MX6
   and phy_status for i.MX7

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Cc: Marek Vasut <marex@denx.de>
Cc: Simon Glass <sjg@chromium.org>
Cc: Stefano Babic <sbabic@denx.de>
This commit is contained in:
Peng Fan 2016-12-22 17:06:42 +08:00 committed by Marek Vasut
parent 63d747477b
commit cccbddc38c
1 changed files with 75 additions and 0 deletions
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75
drivers/usb/host/ehci-mx6.c
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@ -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,