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/*
* (C) Copyright 2004
* Pierre AUBERT, Staubli Faverges, <p.aubert@staubli.com>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
* Init is derived from Linux code.
*/
#include <common.h>
#ifdef CFG_CMD_IDE
#include <mpc5xxx.h>
#define CALC_TIMING(t) (t + period - 1) / period
#ifdef CONFIG_IDE_RESET
extern void init_ide_reset (void);
#endif
int ide_preinit (void)
{
DECLARE_GLOBAL_DATA_PTR;
long period, t0, t1, t2_8, t2_16, t4, ta;
vu_long reg;
struct mpc5xxx_sdma *psdma = (struct mpc5xxx_sdma *) MPC5XXX_SDMA;
reg = *(vu_long *) MPC5XXX_GPS_PORT_CONFIG;
reg = (reg & ~0x03000000ul) | 0x01000000ul;
*(vu_long *) MPC5XXX_GPS_PORT_CONFIG = reg;
/* All sample codes do that... */
*(vu_long *) MPC5XXX_ATA_SHARE_COUNT = 0;
/* Configure and reset host */
*(vu_long *) MPC5XXX_ATA_HOST_CONFIG = MPC5xxx_ATA_HOSTCONF_IORDY |
MPC5xxx_ATA_HOSTCONF_SMR | MPC5xxx_ATA_HOSTCONF_FR;
udelay (10);
*(vu_long *) MPC5XXX_ATA_HOST_CONFIG = MPC5xxx_ATA_HOSTCONF_IORDY;
/* Disable prefetch on Commbus */
psdma->PtdCntrl |= 1;
/* Init timings : we use PIO mode 0 timings */
period = 1000000000 / gd->ipb_clk; /* period in ns */
t0 = CALC_TIMING (600);
t2_8 = CALC_TIMING (290);
t2_16 = CALC_TIMING (165);
reg = (t0 << 24) | (t2_8 << 16) | (t2_16 << 8);
*(vu_long *) MPC5XXX_ATA_PIO1 = reg;
t4 = CALC_TIMING (30);
t1 = CALC_TIMING (70);
ta = CALC_TIMING (35);
reg = (t4 << 24) | (t1 << 16) | (ta << 8);
*(vu_long *) MPC5XXX_ATA_PIO2 = reg;
#ifdef CONFIG_IDE_RESET
init_ide_reset ();
#endif /* CONFIG_IDE_RESET */
return (0);
}
#endif /* CFG_CMD_IDE */
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