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 /* 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 << ATMEL_ID_UHP, &pmc->pcer); 57 #ifdef CONFIG_AT91SAM9261 58 writel(ATMEL_PMC_UHP | AT91_PMC_HCK0, &pmc->scer); 59 #else 60 writel(ATMEL_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 *)ATMEL_BASE_PMC; 69 70 /* Disable USB host clock. */ 71 writel(1 << ATMEL_ID_UHP, &pmc->pcdr); 72 #ifdef CONFIG_AT91SAM9261 73 writel(ATMEL_PMC_UHP | AT91_PMC_HCK0, &pmc->scdr); 74 #else 75 writel(ATMEL_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) */ 100