upstream u-boot with additional patches for our devices/boards:
https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ;
Gbit ethernet patch for some LIME2 revisions ;
with SPI flash support
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
118 lines
2.5 KiB
118 lines
2.5 KiB
/*
|
|
* Copyright (C) 2011 Jana Rapava <fermata7@gmail.com>
|
|
* Copyright (C) 2011 CompuLab, Ltd. <www.compulab.co.il>
|
|
*
|
|
* Authors: Jana Rapava <fermata7@gmail.com>
|
|
* Igor Grinberg <grinberg@compulab.co.il>
|
|
*
|
|
* Based on:
|
|
* linux/drivers/usb/otg/ulpi_viewport.c
|
|
*
|
|
* Original Copyright follow:
|
|
* Copyright (C) 2011 Google, Inc.
|
|
*
|
|
* This software is licensed under the terms of the GNU General Public
|
|
* License version 2, as published by the Free Software Foundation, and
|
|
* may be copied, distributed, and modified under those terms.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <asm/io.h>
|
|
#include <usb/ulpi.h>
|
|
|
|
/* ULPI viewport control bits */
|
|
#define ULPI_SS (1 << 27)
|
|
#define ULPI_RWCTRL (1 << 29)
|
|
#define ULPI_RWRUN (1 << 30)
|
|
#define ULPI_WU (1 << 31)
|
|
|
|
/*
|
|
* Wait for the ULPI request to complete
|
|
*
|
|
* @ulpi_viewport - the address of the viewport
|
|
* @mask - expected value to wait for
|
|
*
|
|
* returns 0 on mask match, ULPI_ERROR on time out.
|
|
*/
|
|
static int ulpi_wait(u32 ulpi_viewport, u32 mask)
|
|
{
|
|
int timeout = CONFIG_USB_ULPI_TIMEOUT;
|
|
|
|
/* Wait for the bits in mask to become zero. */
|
|
while (--timeout) {
|
|
if ((readl(ulpi_viewport) & mask) == 0)
|
|
return 0;
|
|
|
|
udelay(1);
|
|
}
|
|
|
|
return ULPI_ERROR;
|
|
}
|
|
|
|
/*
|
|
* Wake the ULPI PHY up for communication
|
|
*
|
|
* returns 0 on success.
|
|
*/
|
|
static int ulpi_wakeup(u32 ulpi_viewport)
|
|
{
|
|
int err;
|
|
|
|
if (readl(ulpi_viewport) & ULPI_SS)
|
|
return 0; /* already awake */
|
|
|
|
writel(ULPI_WU, ulpi_viewport);
|
|
|
|
err = ulpi_wait(ulpi_viewport, ULPI_WU);
|
|
if (err)
|
|
printf("ULPI wakeup timed out\n");
|
|
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* Issue a ULPI read/write request
|
|
*
|
|
* @value - the ULPI request
|
|
*/
|
|
static int ulpi_request(u32 ulpi_viewport, u32 value)
|
|
{
|
|
int err;
|
|
|
|
err = ulpi_wakeup(ulpi_viewport);
|
|
if (err)
|
|
return err;
|
|
|
|
writel(value, ulpi_viewport);
|
|
|
|
err = ulpi_wait(ulpi_viewport, ULPI_RWRUN);
|
|
if (err)
|
|
printf("ULPI request timed out\n");
|
|
|
|
return err;
|
|
}
|
|
|
|
int ulpi_write(u32 ulpi_viewport, u8 *reg, u32 value)
|
|
{
|
|
u32 val = ULPI_RWRUN | ULPI_RWCTRL | ((u32)reg << 16) | (value & 0xff);
|
|
|
|
return ulpi_request(ulpi_viewport, val);
|
|
}
|
|
|
|
u32 ulpi_read(u32 ulpi_viewport, u8 *reg)
|
|
{
|
|
int err;
|
|
u32 val = ULPI_RWRUN | ((u32)reg << 16);
|
|
|
|
err = ulpi_request(ulpi_viewport, val);
|
|
if (err)
|
|
return err;
|
|
|
|
return (readl(ulpi_viewport) >> 8) & 0xff;
|
|
}
|
|
|