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123 lines
2.6 KiB
123 lines
2.6 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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/* |
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* TI's Davinci platform specific USB wrapper functions. |
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* |
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* Copyright (c) 2008 Texas Instruments |
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* |
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* Author: Thomas Abraham [email protected], Texas Instruments |
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*/ |
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#include <common.h> |
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#include <asm/io.h> |
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#include "davinci.h" |
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#include <asm/arch/hardware.h> |
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#if !defined(CONFIG_DV_USBPHY_CTL) |
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#define CONFIG_DV_USBPHY_CTL (USBPHY_SESNDEN | USBPHY_VBDTCTEN) |
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#endif |
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/* MUSB platform configuration */ |
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struct musb_config musb_cfg = { |
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.regs = (struct musb_regs *)MENTOR_USB0_BASE, |
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.timeout = DAVINCI_USB_TIMEOUT, |
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.musb_speed = 0, |
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}; |
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/* MUSB module register overlay */ |
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struct davinci_usb_regs *dregs; |
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/* |
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* Enable the USB phy |
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*/ |
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static u8 phy_on(void) |
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{ |
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u32 timeout; |
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#ifdef DAVINCI_DM365EVM |
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u32 val; |
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#endif |
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/* Wait until the USB phy is turned on */ |
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#ifdef DAVINCI_DM365EVM |
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writel(USBPHY_PHY24MHZ | USBPHY_SESNDEN | |
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USBPHY_VBDTCTEN, USBPHY_CTL_PADDR); |
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#else |
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writel(CONFIG_DV_USBPHY_CTL, USBPHY_CTL_PADDR); |
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#endif |
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timeout = musb_cfg.timeout; |
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#ifdef DAVINCI_DM365EVM |
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/* Set the ownership of GIO33 to USB */ |
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val = readl(PINMUX4); |
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val &= ~(PINMUX4_USBDRVBUS_BITCLEAR); |
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val |= PINMUX4_USBDRVBUS_BITSET; |
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writel(val, PINMUX4); |
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#endif |
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while (timeout--) |
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if (readl(USBPHY_CTL_PADDR) & USBPHY_PHYCLKGD) |
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return 1; |
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/* USB phy was not turned on */ |
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return 0; |
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} |
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/* |
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* Disable the USB phy |
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*/ |
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static void phy_off(void) |
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{ |
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/* powerdown the on-chip PHY and its oscillator */ |
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writel(USBPHY_OSCPDWN | USBPHY_PHYPDWN, USBPHY_CTL_PADDR); |
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} |
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void __enable_vbus(void) |
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{ |
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/* |
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* nothing to do, vbus is handled through the cpu. |
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* Define this function in board code, if it is |
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* different on your board. |
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*/ |
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} |
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void enable_vbus(void) |
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__attribute__((weak, alias("__enable_vbus"))); |
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/* |
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* This function performs Davinci platform specific initialization for usb0. |
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*/ |
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int musb_platform_init(void) |
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{ |
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u32 revision; |
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/* enable USB VBUS */ |
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enable_vbus(); |
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/* start the on-chip USB phy and its pll */ |
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if (!phy_on()) |
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return -1; |
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/* reset the controller */ |
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dregs = (struct davinci_usb_regs *)DAVINCI_USB0_BASE; |
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writel(1, &dregs->ctrlr); |
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udelay(5000); |
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/* Returns zero if e.g. not clocked */ |
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revision = readl(&dregs->version); |
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if (!revision) |
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return -1; |
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/* Disable all interrupts */ |
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writel(DAVINCI_USB_USBINT_MASK | DAVINCI_USB_RXINT_MASK | |
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DAVINCI_USB_TXINT_MASK , &dregs->intmsksetr); |
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return 0; |
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} |
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/* |
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* This function performs Davinci platform specific deinitialization for usb0. |
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*/ |
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void musb_platform_deinit(void) |
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{ |
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/* Turn of the phy */ |
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phy_off(); |
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/* flush any interrupts */ |
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writel(DAVINCI_USB_USBINT_MASK | DAVINCI_USB_TXINT_MASK | |
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DAVINCI_USB_RXINT_MASK , &dregs->intclrr); |
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}
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