/*
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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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* SPDX-License-Identifier: GPL-2.0+
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*
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* Author: Thomas Abraham t-abraham@ti.com, 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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