LXR uboot/board/freescale/common/cadmus.c

   1/*
   2 * Copyright 2004, 2011 Freescale Semiconductor.
   3 *
   4 * SPDX-License-Identifier:     GPL-2.0+
   5 */
   6
   7
   8#include <common.h>
   9
  10
  11/*
  12 * CADMUS Board System Registers
  13 */
  14#ifndef CONFIG_SYS_CADMUS_BASE_REG
  15#define CONFIG_SYS_CADMUS_BASE_REG      (CADMUS_BASE_ADDR + 0x4000)
  16#endif
  17
  18typedef struct cadmus_reg {
  19    u_char cm_ver;              /* Board version */
  20    u_char cm_csr;              /* General control/status */
  21    u_char cm_rst;              /* Reset control */
  22    u_char cm_hsclk;            /* High speed clock */
  23    u_char cm_hsxclk;           /* High speed clock extended */
  24    u_char cm_led;              /* LED data */
  25    u_char cm_pci;              /* PCI control/status */
  26    u_char cm_dma;              /* DMA control */
  27    u_char cm_reserved[248];    /* Total 256 bytes */
  28} cadmus_reg_t;
  29
  30
  31unsigned int
  32get_board_version(void)
  33{
  34        volatile cadmus_reg_t *cadmus = (cadmus_reg_t *)CONFIG_SYS_CADMUS_BASE_REG;
  35
  36        return cadmus->cm_ver;
  37}
  38
  39
  40unsigned long
  41get_clock_freq(void)
  42{
  43        volatile cadmus_reg_t *cadmus = (cadmus_reg_t *)CONFIG_SYS_CADMUS_BASE_REG;
  44
  45        uint pci1_speed = (cadmus->cm_pci >> 2) & 0x3; /* PSPEED in [4:5] */
  46
  47        if (pci1_speed == 0) {
  48                return 33333333;
  49        } else if (pci1_speed == 1) {
  50                return 66666666;
  51        } else {
  52                /* Really, unknown. Be safe? */
  53                return 33333333;
  54        }
  55}
  56
  57
  58unsigned int
  59get_pci_slot(void)
  60{
  61        volatile cadmus_reg_t *cadmus = (cadmus_reg_t *)CONFIG_SYS_CADMUS_BASE_REG;
  62
  63        /*
  64         * PCI slot in USER bits CSR[6:7] by convention.
  65         */
  66        return ((cadmus->cm_csr >> 6) & 0x3) + 1;
  67}
  68
  69
  70unsigned int
  71get_pci_dual(void)
  72{
  73        volatile cadmus_reg_t *cadmus = (cadmus_reg_t *)CONFIG_SYS_CADMUS_BASE_REG;
  74
  75        /*
  76         * PCI DUAL in CM_PCI[3]
  77         */
  78        return cadmus->cm_pci & 0x10;
  79}
  80