blob: a33fb49de9e866f03dad15b97072001a76467573 (
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
73
|
/*
* (C) Copyright 2012
* Atmel Semiconductor <www.atmel.com>
* Written-by: Bo Shen <voice.shen@atmel.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <watchdog.h>
#include <usb.h>
#include <asm/io.h>
#include <asm/arch/hardware.h>
#include <asm/arch/at91_pmc.h>
#include <asm/arch/clk.h>
#include "ehci.h"
/* Enable UTMI PLL time out 500us
* 10 times as datasheet specified
*/
#define EN_UPLL_TIMEOUT 500UL
int ehci_hcd_init(int index, enum usb_init_type init,
struct ehci_hccr **hccr, struct ehci_hcor **hcor)
{
at91_pmc_t *pmc = (at91_pmc_t *)ATMEL_BASE_PMC;
ulong start_time, tmp_time;
start_time = get_timer(0);
/* Enable UTMI PLL */
writel(AT91_PMC_UPLLEN | AT91_PMC_BIASEN, &pmc->uckr);
while ((readl(&pmc->sr) & AT91_PMC_LOCKU) != AT91_PMC_LOCKU) {
WATCHDOG_RESET();
tmp_time = get_timer(0);
if ((tmp_time - start_time) > EN_UPLL_TIMEOUT) {
printf("ERROR: failed to enable UPLL\n");
return -1;
}
}
/* Enable USB Host clock */
at91_periph_clk_enable(ATMEL_ID_UHPHS);
*hccr = (struct ehci_hccr *)ATMEL_BASE_EHCI;
*hcor = (struct ehci_hcor *)((uint32_t)*hccr +
HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase)));
return 0;
}
int ehci_hcd_stop(int index)
{
at91_pmc_t *pmc = (at91_pmc_t *)ATMEL_BASE_PMC;
ulong start_time, tmp_time;
/* Disable USB Host Clock */
at91_periph_clk_disable(ATMEL_ID_UHPHS);
start_time = get_timer(0);
/* Disable UTMI PLL */
writel(readl(&pmc->uckr) & ~AT91_PMC_UPLLEN, &pmc->uckr);
while ((readl(&pmc->sr) & AT91_PMC_LOCKU) == AT91_PMC_LOCKU) {
WATCHDOG_RESET();
tmp_time = get_timer(0);
if ((tmp_time - start_time) > EN_UPLL_TIMEOUT) {
printf("ERROR: failed to stop UPLL\n");
return -1;
}
}
return 0;
}
|
