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usb: am437x: Add support for am437x xhci USB host

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Add the support for the am437x xhci usb host.

The xHCI host on AM437 is connected to a usb2 phy so need to
add support to enable those clocks.

Signed-off-by: Dan Murphy <dmurphy@ti.com>
This commit is contained in:
Dan Murphy 2013-10-11 12:28:18 -05:00 committed by Marek Vasut
parent 834e91af43
commit 3d799c7f5e
4 changed files with 48 additions and 0 deletions
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10
arch/arm/include/asm/arch-am33xx/hardware_am43xx.h
View file

@ -51,4 +51,14 @@
/* RTC base address */
#define RTC_BASE 0x44E3E000
/* USB Clock Control */
#define PRM_PER_USB_OTG_SS0_CLKCTRL (CM_PER + 0x260)
#define PRM_PER_USB_OTG_SS1_CLKCTRL (CM_PER + 0x268)
#define USBOTGSSX_CLKCTRL_MODULE_EN (1 << 2)
#define USBOTGSSX_CLKCTRL_OPTFCLKEN_REFCLK960 (1 << 8)
#define PRM_PER_USBPHYOCP2SCP0_CLKCTRL (CM_PER + 0x5b8)
#define PRM_PER_USBPHYOCP2SCP1_CLKCTRL (CM_PER + 0x5c0)
#define USBPHYOCPSCP_MODULE_EN (1 << 2)
#endif /* __AM43XX_HARDWARE_AM43XX_H */

23
drivers/usb/phy/omap_usb_phy.c
View file

@ -207,6 +207,25 @@ void usb_phy_power(int on)
}
#endif /* CONFIG_OMAP_USB2PHY2_HOST */
#ifdef CONFIG_AM437X_USB2PHY2_HOST
static void am437x_enable_usb2_phy2(struct omap_xhci *omap)
{
const u32 usb_otg_ss_clk_val = (USBOTGSSX_CLKCTRL_MODULE_EN |
USBOTGSSX_CLKCTRL_OPTFCLKEN_REFCLK960);
writel(usb_otg_ss_clk_val, PRM_PER_USB_OTG_SS0_CLKCTRL);
writel(usb_otg_ss_clk_val, PRM_PER_USB_OTG_SS1_CLKCTRL);
writel(USBPHYOCPSCP_MODULE_EN, PRM_PER_USBPHYOCP2SCP0_CLKCTRL);
writel(USBPHYOCPSCP_MODULE_EN, PRM_PER_USBPHYOCP2SCP1_CLKCTRL);
}
void usb_phy_power(int on)
{
return;
}
#endif /* CONFIG_AM437X_USB2PHY2_HOST */
void omap_reset_usb_phy(struct dwc3 *dwc3_reg)
{
/* Assert USB3 PHY reset */
@ -231,6 +250,10 @@ void omap_enable_phy(struct omap_xhci *omap)
omap_enable_usb2_phy2(omap);
#endif
#ifdef CONFIG_AM437X_USB2PHY2_HOST
am437x_enable_usb2_phy2(omap);
#endif
#ifdef CONFIG_OMAP_USB3PHY1_HOST
omap_enable_usb3_phy(omap);
omap_usb3_phy_init(omap->usb3_phy);

11
include/configs/am43xx_evm.h
View file

@ -24,6 +24,7 @@
#define CONFIG_SYS_HUSH_PARSER /* use "hush" command parser */
#define CONFIG_SYS_PROMPT "U-Boot# "
#define CONFIG_SYS_NO_FLASH
#define CONFIG_SYS_CACHELINE_SIZE 32
#define CONFIG_OF_LIBFDT
#define CONFIG_CMD_BOOTZ
@ -132,4 +133,14 @@
/* Unsupported features */
#undef CONFIG_USE_IRQ
#define CONFIG_CMD_USB
#define CONFIG_USB_HOST
#define CONFIG_USB_XHCI
#define CONFIG_USB_XHCI_OMAP
#define CONFIG_USB_STORAGE
#define CONFIG_SYS_USB_XHCI_MAX_ROOT_PORTS 2
#define CONFIG_OMAP_USB_PHY
#define CONFIG_AM437X_USB2PHY2_HOST
#endif /* __CONFIG_AM43XX_EVM_H */

4
include/linux/usb/xhci-omap.h
View file

@ -14,6 +14,10 @@
#define OMAP_XHCI_BASE 0x488d0000
#define OMAP_OCP1_SCP_BASE 0x4A081000
#define OMAP_OTG_WRAPPER_BASE 0x488c0000
#elif defined CONFIG_AM43XX
#define OMAP_XHCI_BASE 0x483d0000
#define OMAP_OCP1_SCP_BASE 0x483E8000
#define OMAP_OTG_WRAPPER_BASE 0x483dc100
#else
/* Default to the OMAP5 XHCI defines */
#define OMAP_XHCI_BASE 0x4a030000