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) */ 112