mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-05 18:56:15 +09:00
83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
124 lines
2.6 KiB
C
124 lines
2.6 KiB
C
// 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 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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