1 /* 2 * Copyright 2004, 2011 Freescale Semiconductor. 3 * 4 * See file CREDITS for list of people who contributed to this 5 * project. 6 * 7 * This program is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU General Public License as 9 * published by the Free Software Foundation; either version 2 of 10 * the License, or (at your option) any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 20 * MA 02111-1307 USA 21 */ 22 23 24 #include <common.h> 25 26 27 /* 28 * CADMUS Board System Registers 29 */ 30 #ifndef CONFIG_SYS_CADMUS_BASE_REG 31 #define CONFIG_SYS_CADMUS_BASE_REG (CADMUS_BASE_ADDR + 0x4000) 32 #endif 33 34 typedef struct cadmus_reg { 35 u_char cm_ver; /* Board version */ 36 u_char cm_csr; /* General control/status */ 37 u_char cm_rst; /* Reset control */ 38 u_char cm_hsclk; /* High speed clock */ 39 u_char cm_hsxclk; /* High speed clock extended */ 40 u_char cm_led; /* LED data */ 41 u_char cm_pci; /* PCI control/status */ 42 u_char cm_dma; /* DMA control */ 43 u_char cm_reserved[248]; /* Total 256 bytes */ 44 } cadmus_reg_t; 45 46 47 unsigned int 48 get_board_version(void) 49 { 50 volatile cadmus_reg_t *cadmus = (cadmus_reg_t *)CONFIG_SYS_CADMUS_BASE_REG; 51 52 return cadmus->cm_ver; 53 } 54 55 56 unsigned long 57 get_clock_freq(void) 58 { 59 volatile cadmus_reg_t *cadmus = (cadmus_reg_t *)CONFIG_SYS_CADMUS_BASE_REG; 60 61 uint pci1_speed = (cadmus->cm_pci >> 2) & 0x3; /* PSPEED in [4:5] */ 62 63 if (pci1_speed == 0) { 64 return 33333333; 65 } else if (pci1_speed == 1) { 66 return 66666666; 67 } else { 68 /* Really, unknown. Be safe? */ 69 return 33333333; 70 } 71 } 72 73 74 unsigned int 75 get_pci_slot(void) 76 { 77 volatile cadmus_reg_t *cadmus = (cadmus_reg_t *)CONFIG_SYS_CADMUS_BASE_REG; 78 79 /* 80 * PCI slot in USER bits CSR[6:7] by convention. 81 */ 82 return ((cadmus->cm_csr >> 6) & 0x3) + 1; 83 } 84 85 86 unsigned int 87 get_pci_dual(void) 88 { 89 volatile cadmus_reg_t *cadmus = (cadmus_reg_t *)CONFIG_SYS_CADMUS_BASE_REG; 90 91 /* 92 * PCI DUAL in CM_PCI[3] 93 */ 94 return cadmus->cm_pci & 0x10; 95 } 96