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 36 #if defined(CONFIG_AT91CAP9) || defined(CONFIG_AT91SAM9260) || \ 37 defined(CONFIG_AT91SAM9263) || defined(CONFIG_AT91SAM9G20) 38 /* Enable PLLB */ 39 at91_sys_write(AT91_CKGR_PLLBR, get_pllb_init()); 40 while ((at91_sys_read(AT91_PMC_SR) & AT91_PMC_LOCKB) != AT91_PMC_LOCKB) 41 ; 42 #endif 43 44 /* Enable USB host clock. */ 45 at91_sys_write(AT91_PMC_PCER, 1 << AT91_ID_UHP); 46 #ifdef CONFIG_AT91SAM9261 47 at91_sys_write(AT91_PMC_SCER, AT91_PMC_UHP | AT91_PMC_HCK0); 48 #else 49 at91_sys_write(AT91_PMC_SCER, AT91_PMC_UHP); 50 #endif 51 52 return 0; 53 } 54 55 int usb_cpu_stop(void) 56 { 57 /* Disable USB host clock. */ 58 at91_sys_write(AT91_PMC_PCDR, 1 << AT91_ID_UHP); 59 #ifdef CONFIG_AT91SAM9261 60 at91_sys_write(AT91_PMC_SCDR, AT91_PMC_UHP | AT91_PMC_HCK0); 61 #else 62 at91_sys_write(AT91_PMC_SCDR, AT91_PMC_UHP); 63 #endif 64 65 #if defined(CONFIG_AT91CAP9) || defined(CONFIG_AT91SAM9260) || \ 66 defined(CONFIG_AT91SAM9263) || defined(CONFIG_AT91SAM9G20) 67 /* Disable PLLB */ 68 at91_sys_write(AT91_CKGR_PLLBR, 0); 69 while ((at91_sys_read(AT91_PMC_SR) & AT91_PMC_LOCKB) != 0) 70 ; 71 #endif 72 73 return 0; 74 } 75 76 int usb_cpu_init_fail(void) 77 { 78 return usb_cpu_stop(); 79 } 80 81 #endif /* defined(CONFIG_USB_OHCI) && defined(CONFIG_SYS_USB_OHCI_CPU_INIT) */ 82