tizen 2.4 release
[kernel/u-boot-tm1.git] / drivers / usb / host / ohci-at91.c
1 /*
2  * (C) Copyright 2006
3  * DENX Software Engineering <mk@denx.de>
4  *
5  * See file CREDITS for list of people who contributed to this
6  * project.
7  *
8  * This program is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU General Public License as
10  * published by the Free Software Foundation; either version 2 of
11  * the License, or (at your option) any later version.
12  *
13  * This program is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16  * GNU General Public License for more details.
17  *
18  * You should have received a copy of the GNU General Public License
19  * along with this program; if not, write to the Free Software
20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
21  * MA 02111-1307 USA
22  */
23
24 #include <common.h>
25
26 #if defined(CONFIG_USB_OHCI_NEW) && defined(CONFIG_SYS_USB_OHCI_CPU_INIT)
27
28 #include <asm/arch/hardware.h>
29 #include <asm/arch/io.h>
30 #include <asm/arch/at91_pmc.h>
31 #include <asm/arch/clk.h>
32
33 int usb_cpu_init(void)
34 {
35         at91_pmc_t *pmc = (at91_pmc_t *)AT91_PMC_BASE;
36
37 #if defined(CONFIG_AT91CAP9) || defined(CONFIG_AT91SAM9260) || \
38     defined(CONFIG_AT91SAM9263) || defined(CONFIG_AT91SAM9G20) || \
39     defined(CONFIG_AT91SAM9261)
40         /* Enable PLLB */
41         writel(get_pllb_init(), &pmc->pllbr);
42         while ((readl(&pmc->sr) & AT91_PMC_LOCKB) != AT91_PMC_LOCKB)
43                 ;
44 #elif defined(CONFIG_AT91SAM9G45) || defined(CONFIG_AT91SAM9M10G45)
45         /* Enable UPLL */
46         writel(readl(&pmc->uckr) | AT91_PMC_UPLLEN | AT91_PMC_BIASEN,
47                 &pmc->uckr);
48         while ((readl(&pmc->sr) & AT91_PMC_LOCKU) != AT91_PMC_LOCKU)
49                 ;
50
51         /* Select PLLA as input clock of OHCI */
52         writel(AT91_PMC_USBS_USB_UPLL | AT91_PMC_USBDIV_10, &pmc->usb);
53 #endif
54
55         /* Enable USB host clock. */
56         writel(1 << AT91_ID_UHP, &pmc->pcer);
57 #ifdef CONFIG_AT91SAM9261
58         writel(AT91_PMC_UHP | AT91_PMC_HCK0, &pmc->scer);
59 #else
60         writel(AT91_PMC_UHP, &pmc->scer);
61 #endif
62
63         return 0;
64 }
65
66 int usb_cpu_stop(void)
67 {
68         at91_pmc_t *pmc = (at91_pmc_t *)AT91_PMC_BASE;
69
70         /* Disable USB host clock. */
71         writel(1 << AT91_ID_UHP, &pmc->pcdr);
72 #ifdef CONFIG_AT91SAM9261
73         writel(AT91_PMC_UHP | AT91_PMC_HCK0, &pmc->scdr);
74 #else
75         writel(AT91_PMC_UHP, &pmc->scdr);
76 #endif
77
78 #if defined(CONFIG_AT91CAP9) || defined(CONFIG_AT91SAM9260) || \
79     defined(CONFIG_AT91SAM9263) || defined(CONFIG_AT91SAM9G20)
80         /* Disable PLLB */
81         writel(0, &pmc->pllbr);
82         while ((readl(&pmc->sr) & AT91_PMC_LOCKB) != 0)
83                 ;
84 #elif defined(CONFIG_AT91SAM9G45) || defined(CONFIG_AT91SAM9M10G45)
85         /* Disable UPLL */
86         writel(readl(&pmc->uckr) & (~AT91_PMC_UPLLEN), &pmc->uckr);
87         while ((readl(&pmc->sr) & AT91_PMC_LOCKU) == AT91_PMC_LOCKU)
88                 ;
89 #endif
90
91         return 0;
92 }
93
94 int usb_cpu_init_fail(void)
95 {
96         return usb_cpu_stop();
97 }
98
99 #endif /* defined(CONFIG_USB_OHCI) && defined(CONFIG_SYS_USB_OHCI_CPU_INIT) */