mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-23 11:33:32 +00:00
c05ed00afb
Move this uncommon header out of the common header. Signed-off-by: Simon Glass <sjg@chromium.org>
72 lines
1.5 KiB
C
72 lines
1.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* OMAP ulpi viewport support
|
|
* Based on drivers/usb/ulpi/ulpi-viewport.c
|
|
*
|
|
* Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com
|
|
* Author: Govindraj R <govindraj.raja@ti.com>
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <log.h>
|
|
#include <asm/io.h>
|
|
#include <linux/delay.h>
|
|
#include <usb/ulpi.h>
|
|
|
|
#define OMAP_ULPI_WR_OPSEL (2 << 22)
|
|
#define OMAP_ULPI_RD_OPSEL (3 << 22)
|
|
#define OMAP_ULPI_START (1 << 31)
|
|
|
|
/*
|
|
* Wait for having ulpi in done state
|
|
*/
|
|
static int ulpi_wait(struct ulpi_viewport *ulpi_vp, u32 mask)
|
|
{
|
|
int timeout = CONFIG_USB_ULPI_TIMEOUT;
|
|
|
|
while (--timeout) {
|
|
if (!(readl(ulpi_vp->viewport_addr) & mask))
|
|
return 0;
|
|
|
|
udelay(1);
|
|
}
|
|
|
|
return ULPI_ERROR;
|
|
}
|
|
|
|
/*
|
|
* Issue a ULPI read/write request
|
|
*/
|
|
static int ulpi_request(struct ulpi_viewport *ulpi_vp, u32 value)
|
|
{
|
|
int err;
|
|
|
|
writel(value, ulpi_vp->viewport_addr);
|
|
|
|
err = ulpi_wait(ulpi_vp, OMAP_ULPI_START);
|
|
if (err)
|
|
debug("ULPI request timed out\n");
|
|
|
|
return err;
|
|
}
|
|
|
|
int ulpi_write(struct ulpi_viewport *ulpi_vp, u8 *reg, u32 value)
|
|
{
|
|
u32 val = OMAP_ULPI_START | (((ulpi_vp->port_num + 1) & 0xf) << 24) |
|
|
OMAP_ULPI_WR_OPSEL | ((u32)reg << 16) | (value & 0xff);
|
|
|
|
return ulpi_request(ulpi_vp, val);
|
|
}
|
|
|
|
u32 ulpi_read(struct ulpi_viewport *ulpi_vp, u8 *reg)
|
|
{
|
|
int err;
|
|
u32 val = OMAP_ULPI_START | (((ulpi_vp->port_num + 1) & 0xf) << 24) |
|
|
OMAP_ULPI_RD_OPSEL | ((u32)reg << 16);
|
|
|
|
err = ulpi_request(ulpi_vp, val);
|
|
if (err)
|
|
return err;
|
|
|
|
return readl(ulpi_vp->viewport_addr) & 0xff;
|
|
}
|