blob: 8b930e3fa919bf1a510952724be8da624c664e83 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
|
// 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;
}
|
