LXR uboot/cpu/mpc5xxx/ide.c

   1/*
   2 * (C) Copyright 2004
   3 * Pierre AUBERT, Staubli Faverges, <p.aubert@staubli.com>
   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 * Init is derived from Linux code.
  24 */
  25#include <common.h>
  26
  27#if defined(CONFIG_CMD_IDE)
  28#include <mpc5xxx.h>
  29
  30DECLARE_GLOBAL_DATA_PTR;
  31
  32#define CALC_TIMING(t) (t + period - 1) / period
  33
  34#ifdef CONFIG_IDE_RESET
  35extern void init_ide_reset (void);
  36#endif
  37
  38int ide_preinit (void)
  39{
  40        long period, t0, t1, t2_8, t2_16, t4, ta;
  41        vu_long reg;
  42        struct mpc5xxx_sdma *psdma = (struct mpc5xxx_sdma *) MPC5XXX_SDMA;
  43
  44        reg = *(vu_long *) MPC5XXX_GPS_PORT_CONFIG;
  45#if defined(CONFIG_SYS_ATA_CS_ON_I2C2)
  46        /* ATA cs0/1 on i2c2 clk/io */
  47        reg = (reg & ~0x03000000ul) | 0x02000000ul;
  48#elif defined(CONFIG_SYS_ATA_CS_ON_TIMER01)
  49        /* ATA cs0/1 on Timer 0/1 */
  50        reg = (reg & ~0x03000000ul) | 0x03000000ul;
  51#else
  52        /* ATA cs0/1 on Local Plus cs4/5 */
  53        reg = (reg & ~0x03000000ul) | 0x01000000ul;
  54#endif  /* CONFIG_TOTAL5200 */
  55        *(vu_long *) MPC5XXX_GPS_PORT_CONFIG = reg;
  56
  57        /* All sample codes do that... */
  58        *(vu_long *) MPC5XXX_ATA_SHARE_COUNT = 0;
  59
  60#if defined(CONFIG_UC101)
  61        /* Configure and reset host */
  62        *(vu_long *) MPC5XXX_ATA_HOST_CONFIG =
  63                MPC5xxx_ATA_HOSTCONF_SMR | MPC5xxx_ATA_HOSTCONF_FR;
  64        udelay (10);
  65        *(vu_long *) MPC5XXX_ATA_HOST_CONFIG = 0;
  66#else
  67        /* Configure and reset host */
  68        *(vu_long *) MPC5XXX_ATA_HOST_CONFIG = MPC5xxx_ATA_HOSTCONF_IORDY |
  69                MPC5xxx_ATA_HOSTCONF_SMR | MPC5xxx_ATA_HOSTCONF_FR;
  70        udelay (10);
  71        *(vu_long *) MPC5XXX_ATA_HOST_CONFIG = MPC5xxx_ATA_HOSTCONF_IORDY;
  72#endif
  73
  74        /* Disable prefetch on Commbus */
  75        psdma->PtdCntrl |= 1;
  76
  77        /* Init timings : we use PIO mode 0 timings */
  78        period = 1000000000 / gd->ipb_clk;      /* period in ns */
  79
  80        t0 = CALC_TIMING (600);
  81        t2_8 = CALC_TIMING (290);
  82        t2_16 = CALC_TIMING (165);
  83        reg = (t0 << 24) | (t2_8 << 16) | (t2_16 << 8);
  84        *(vu_long *) MPC5XXX_ATA_PIO1 = reg;
  85
  86        t4 = CALC_TIMING (30);
  87        t1 = CALC_TIMING (70);
  88        ta = CALC_TIMING (35);
  89        reg = (t4 << 24) | (t1 << 16) | (ta << 8);
  90
  91        *(vu_long *) MPC5XXX_ATA_PIO2 = reg;
  92
  93#ifdef CONFIG_IDE_RESET
  94        init_ide_reset ();
  95#endif /* CONFIG_IDE_RESET */
  96
  97        return (0);
  98}
  99#endif
 100