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d678a59d2d
When bringing in the series 'arm: dts: am62-beagleplay: Fix Beagleplay Ethernet"' I failed to notice that b4 noticed it was based on next and so took that as the base commit and merged that part of next to master. This reverts commitc8ffd1356d, reversing changes made to2ee6f3a5f7. Reported-by: Jonas Karlman <jonas@kwiboo.se> Signed-off-by: Tom Rini <trini@konsulko.com>
73 lines
1.5 KiB
C
73 lines
1.5 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 - https://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 <log.h>
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#include <asm/io.h>
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#include <linux/delay.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 = CFG_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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