mirror of
https://github.com/AsahiLinux/u-boot
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95 lines
2.3 KiB
C
95 lines
2.3 KiB
C
/*
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* Copyright 2004 Freescale Semiconductor.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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/*
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* CADMUS Board System Registers
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*/
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#ifndef CONFIG_SYS_CADMUS_BASE_REG
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#define CONFIG_SYS_CADMUS_BASE_REG (CADMUS_BASE_ADDR + 0x4000)
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#endif
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typedef struct cadmus_reg {
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u_char cm_ver; /* Board version */
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u_char cm_csr; /* General control/status */
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u_char cm_rst; /* Reset control */
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u_char cm_hsclk; /* High speed clock */
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u_char cm_hsxclk; /* High speed clock extended */
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u_char cm_led; /* LED data */
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u_char cm_pci; /* PCI control/status */
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u_char cm_dma; /* DMA control */
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u_char cm_reserved[248]; /* Total 256 bytes */
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} cadmus_reg_t;
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unsigned int
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get_board_version(void)
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{
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volatile cadmus_reg_t *cadmus = (cadmus_reg_t *)CONFIG_SYS_CADMUS_BASE_REG;
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return cadmus->cm_ver;
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}
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unsigned long
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get_clock_freq(void)
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{
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volatile cadmus_reg_t *cadmus = (cadmus_reg_t *)CONFIG_SYS_CADMUS_BASE_REG;
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uint pci1_speed = (cadmus->cm_pci >> 2) & 0x3; /* PSPEED in [4:5] */
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if (pci1_speed == 0) {
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return 33000000;
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} else if (pci1_speed == 1) {
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return 66000000;
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} else {
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/* Really, unknown. Be safe? */
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return 33000000;
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}
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}
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unsigned int
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get_pci_slot(void)
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{
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volatile cadmus_reg_t *cadmus = (cadmus_reg_t *)CONFIG_SYS_CADMUS_BASE_REG;
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/*
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* PCI slot in USER bits CSR[6:7] by convention.
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*/
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return ((cadmus->cm_csr >> 6) & 0x3) + 1;
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}
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unsigned int
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get_pci_dual(void)
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{
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volatile cadmus_reg_t *cadmus = (cadmus_reg_t *)CONFIG_SYS_CADMUS_BASE_REG;
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/*
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* PCI DUAL in CM_PCI[3]
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*/
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return cadmus->cm_pci & 0x10;
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}
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