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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>
71 lines
1.4 KiB
C
71 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* OMAP ulpi viewport support
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* Based on drivers/usb/ulpi/ulpi-viewport.c
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*
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* Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com
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* Author: Govindraj R <govindraj.raja@ti.com>
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*/
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#include <common.h>
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#include <asm/io.h>
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#include <usb/ulpi.h>
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#define OMAP_ULPI_WR_OPSEL (2 << 22)
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#define OMAP_ULPI_RD_OPSEL (3 << 22)
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#define OMAP_ULPI_START (1 << 31)
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/*
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* Wait for having ulpi in done state
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*/
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static int ulpi_wait(struct ulpi_viewport *ulpi_vp, u32 mask)
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{
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int timeout = CONFIG_USB_ULPI_TIMEOUT;
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while (--timeout) {
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if (!(readl(ulpi_vp->viewport_addr) & mask))
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return 0;
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udelay(1);
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}
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return ULPI_ERROR;
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}
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/*
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* Issue a ULPI read/write request
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*/
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static int ulpi_request(struct ulpi_viewport *ulpi_vp, u32 value)
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{
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int err;
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writel(value, ulpi_vp->viewport_addr);
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err = ulpi_wait(ulpi_vp, OMAP_ULPI_START);
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if (err)
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debug("ULPI request timed out\n");
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return err;
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}
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int ulpi_write(struct ulpi_viewport *ulpi_vp, u8 *reg, u32 value)
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{
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u32 val = OMAP_ULPI_START | (((ulpi_vp->port_num + 1) & 0xf) << 24) |
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OMAP_ULPI_WR_OPSEL | ((u32)reg << 16) | (value & 0xff);
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return ulpi_request(ulpi_vp, val);
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}
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u32 ulpi_read(struct ulpi_viewport *ulpi_vp, u8 *reg)
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{
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int err;
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u32 val = OMAP_ULPI_START | (((ulpi_vp->port_num + 1) & 0xf) << 24) |
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OMAP_ULPI_RD_OPSEL | ((u32)reg << 16);
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err = ulpi_request(ulpi_vp, val);
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if (err)
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return err;
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return readl(ulpi_vp->viewport_addr) & 0xff;
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}
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