]> git.kernelconcepts.de Git - karo-tx-uboot.git/blob - drivers/usb/host/ohci-at91.c
Merge branch 'master' of git://git.denx.de/u-boot-nand-flash
[karo-tx-uboot.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/io.h>
29 #include <asm/arch/hardware.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 *)ATMEL_BASE_PMC;
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         defined(CONFIG_AT91SAM9X5) || defined(CONFIG_SAMA5D3)
46         /* Enable UPLL */
47         writel(readl(&pmc->uckr) | AT91_PMC_UPLLEN | AT91_PMC_BIASEN,
48                 &pmc->uckr);
49         while ((readl(&pmc->sr) & AT91_PMC_LOCKU) != AT91_PMC_LOCKU)
50                 ;
51
52         /* Select PLLA as input clock of OHCI */
53         writel(AT91_PMC_USBS_USB_UPLL | AT91_PMC_USBDIV_10, &pmc->usb);
54 #endif
55
56         /* Enable USB host clock. */
57 #ifdef CONFIG_SAMA5D3
58         writel(1 << (ATMEL_ID_UHP - 32), &pmc->pcer1);
59 #else
60         writel(1 << ATMEL_ID_UHP, &pmc->pcer);
61 #endif
62
63 #if defined(CONFIG_AT91SAM9261) || defined(CONFIG_AT91SAM9G10)
64         writel(ATMEL_PMC_UHP | AT91_PMC_HCK0, &pmc->scer);
65 #else
66         writel(ATMEL_PMC_UHP, &pmc->scer);
67 #endif
68
69         return 0;
70 }
71
72 int usb_cpu_stop(void)
73 {
74         at91_pmc_t *pmc = (at91_pmc_t *)ATMEL_BASE_PMC;
75
76         /* Disable USB host clock. */
77 #ifdef CONFIG_SAMA5D3
78         writel(1 << (ATMEL_ID_UHP - 32), &pmc->pcdr1);
79 #else
80         writel(1 << ATMEL_ID_UHP, &pmc->pcdr);
81 #endif
82
83 #if defined(CONFIG_AT91SAM9261) || defined(CONFIG_AT91SAM9G10)
84         writel(ATMEL_PMC_UHP | AT91_PMC_HCK0, &pmc->scdr);
85 #else
86         writel(ATMEL_PMC_UHP, &pmc->scdr);
87 #endif
88
89 #if defined(CONFIG_AT91CAP9) || defined(CONFIG_AT91SAM9260) || \
90     defined(CONFIG_AT91SAM9263) || defined(CONFIG_AT91SAM9G20)
91         /* Disable PLLB */
92         writel(0, &pmc->pllbr);
93         while ((readl(&pmc->sr) & AT91_PMC_LOCKB) != 0)
94                 ;
95 #elif defined(CONFIG_AT91SAM9G45) || defined(CONFIG_AT91SAM9M10G45) || \
96         defined(CONFIG_AT91SAM9X5) || defined(CONFIG_SAMA5D3)
97         /* Disable UPLL */
98         writel(readl(&pmc->uckr) & (~AT91_PMC_UPLLEN), &pmc->uckr);
99         while ((readl(&pmc->sr) & AT91_PMC_LOCKU) == AT91_PMC_LOCKU)
100                 ;
101 #endif
102
103         return 0;
104 }
105
106 int usb_cpu_init_fail(void)
107 {
108         return usb_cpu_stop();
109 }
110
111 #endif /* defined(CONFIG_USB_OHCI) && defined(CONFIG_SYS_USB_OHCI_CPU_INIT) */