mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-14 08:57:58 +00:00
96 lines
2.7 KiB
C
96 lines
2.7 KiB
C
/*
|
|
* (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>
|
|
|
|
#if defined(CONFIG_CMD_IDE)
|
|
#include <mpc5xxx.h>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
#define CALC_TIMING(t) (t + period - 1) / period
|
|
|
|
#ifdef CONFIG_IDE_RESET
|
|
extern void init_ide_reset (void);
|
|
#endif
|
|
|
|
int ide_preinit (void)
|
|
{
|
|
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;
|
|
#if defined(CONFIG_TOTAL5200)
|
|
/* ATA cs0/1 on i2c2 clk/io */
|
|
reg = (reg & ~0x03000000ul) | 0x02000000ul;
|
|
#else
|
|
/* ATA cs0/1 on Local Plus cs4/5 */
|
|
reg = (reg & ~0x03000000ul) | 0x01000000ul;
|
|
#endif /* CONFIG_TOTAL5200 */
|
|
*(vu_long *) MPC5XXX_GPS_PORT_CONFIG = reg;
|
|
|
|
/* All sample codes do that... */
|
|
*(vu_long *) MPC5XXX_ATA_SHARE_COUNT = 0;
|
|
|
|
#if defined(CONFIG_UC101)
|
|
/* Configure and reset host */
|
|
*(vu_long *) MPC5XXX_ATA_HOST_CONFIG =
|
|
MPC5xxx_ATA_HOSTCONF_SMR | MPC5xxx_ATA_HOSTCONF_FR;
|
|
udelay (10);
|
|
*(vu_long *) MPC5XXX_ATA_HOST_CONFIG = 0;
|
|
#else
|
|
/* 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;
|
|
#endif
|
|
|
|
/* 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
|