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) 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 writel(1 << ATMEL_ID_UHP, &pmc->pcer); 58 #if defined(CONFIG_AT91SAM9261) || defined(CONFIG_AT91SAM9G10) 59 writel(ATMEL_PMC_UHP | AT91_PMC_HCK0, &pmc->scer); 60 #else 61 writel(ATMEL_PMC_UHP, &pmc->scer); 62 #endif 63 64 return 0; 65 } 66 67 int usb_cpu_stop(void) 68 { 69 at91_pmc_t *pmc = (at91_pmc_t *)ATMEL_BASE_PMC; 70 71 /* Disable USB host clock. */ 72 writel(1 << ATMEL_ID_UHP, &pmc->pcdr); 73 #if defined(CONFIG_AT91SAM9261) || defined(CONFIG_AT91SAM9G10) 74 writel(ATMEL_PMC_UHP | AT91_PMC_HCK0, &pmc->scdr); 75 #else 76 writel(ATMEL_PMC_UHP, &pmc->scdr); 77 #endif 78 79 #if defined(CONFIG_AT91CAP9) || defined(CONFIG_AT91SAM9260) || \ 80 defined(CONFIG_AT91SAM9263) || defined(CONFIG_AT91SAM9G20) 81 /* Disable PLLB */ 82 writel(0, &pmc->pllbr); 83 while ((readl(&pmc->sr) & AT91_PMC_LOCKB) != 0) 84 ; 85 #elif defined(CONFIG_AT91SAM9G45) || defined(CONFIG_AT91SAM9M10G45) || \ 86 defined(CONFIG_AT91SAM9X5) 87 /* Disable UPLL */ 88 writel(readl(&pmc->uckr) & (~AT91_PMC_UPLLEN), &pmc->uckr); 89 while ((readl(&pmc->sr) & AT91_PMC_LOCKU) == AT91_PMC_LOCKU) 90 ; 91 #endif 92 93 return 0; 94 } 95 96 int usb_cpu_init_fail(void) 97 { 98 return usb_cpu_stop(); 99 } 100 101 #endif /* defined(CONFIG_USB_OHCI) && defined(CONFIG_SYS_USB_OHCI_CPU_INIT) */ 102