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/*
* (C) Copyright 2000-2011
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* 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
*
*/
/* Code taken from cmd_ide.c */
#include <common.h>
#include <ata.h>
#include "ide.h"
#ifdef CONFIG_IDE_8xx_DIRECT
#include <mpc8xx.h>
#include <pcmcia.h>
DECLARE_GLOBAL_DATA_PTR;
/* Timings for IDE Interface
*
* SETUP / LENGTH / HOLD - cycles valid for 50 MHz clk
* 70 165 30 PIO-Mode 0, [ns]
* 4 9 2 [Cycles]
* 50 125 20 PIO-Mode 1, [ns]
* 3 7 2 [Cycles]
* 30 100 15 PIO-Mode 2, [ns]
* 2 6 1 [Cycles]
* 30 80 10 PIO-Mode 3, [ns]
* 2 5 1 [Cycles]
* 25 70 10 PIO-Mode 4, [ns]
* 2 4 1 [Cycles]
*/
static const pio_config_t pio_config_ns[IDE_MAX_PIO_MODE+1] = {
/* Setup Length Hold */
{ 70, 165, 30 }, /* PIO-Mode 0, [ns] */
{ 50, 125, 20 }, /* PIO-Mode 1, [ns] */
{ 30, 101, 15 }, /* PIO-Mode 2, [ns] */
{ 30, 80, 10 }, /* PIO-Mode 3, [ns] */
{ 25, 70, 10 }, /* PIO-Mode 4, [ns] */
};
static pio_config_t pio_config_clk[IDE_MAX_PIO_MODE+1];
#ifndef CONFIG_SYS_PIO_MODE
#define CONFIG_SYS_PIO_MODE 0 /* use a relaxed default */
#endif
static int pio_mode = CONFIG_SYS_PIO_MODE;
/* Make clock cycles and always round up */
#define PCMCIA_MK_CLKS(t, T) (((t) * (T) + 999U) / 1000U)
static void set_pcmcia_timing(int pmode)
{
volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
volatile pcmconf8xx_t *pcmp = &(immr->im_pcmcia);
ulong timings;
debug("Set timing for PIO Mode %d\n", pmode);
timings = PCMCIA_SHT(pio_config_clk[pmode].t_hold)
| PCMCIA_SST(pio_config_clk[pmode].t_setup)
| PCMCIA_SL(pio_config_clk[pmode].t_length);
/*
* IDE 0
*/
pcmp->pcmc_pbr0 = CONFIG_SYS_PCMCIA_PBR0;
#if (CONFIG_SYS_PCMCIA_POR0 != 0)
pcmp->pcmc_por0 = CONFIG_SYS_PCMCIA_POR0 | timings;
#else
pcmp->pcmc_por0 = CONFIG_SYS_PCMCIA_POR0;
#endif
debug("PBR0: %08x POR0: %08x\n", pcmp->pcmc_pbr0, pcmp->pcmc_por0);
pcmp->pcmc_pbr1 = CONFIG_SYS_PCMCIA_PBR1;
#if (CONFIG_SYS_PCMCIA_POR1 != 0)
pcmp->pcmc_por1 = CONFIG_SYS_PCMCIA_POR1 | timings;
#else
pcmp->pcmc_por1 = CONFIG_SYS_PCMCIA_POR1;
#endif
debug("PBR1: %08x POR1: %08x\n", pcmp->pcmc_pbr1, pcmp->pcmc_por1);
pcmp->pcmc_pbr2 = CONFIG_SYS_PCMCIA_PBR2;
#if (CONFIG_SYS_PCMCIA_POR2 != 0)
pcmp->pcmc_por2 = CONFIG_SYS_PCMCIA_POR2 | timings;
#else
pcmp->pcmc_por2 = CONFIG_SYS_PCMCIA_POR2;
#endif
debug("PBR2: %08x POR2: %08x\n", pcmp->pcmc_pbr2, pcmp->pcmc_por2);
pcmp->pcmc_pbr3 = CONFIG_SYS_PCMCIA_PBR3;
#if (CONFIG_SYS_PCMCIA_POR3 != 0)
pcmp->pcmc_por3 = CONFIG_SYS_PCMCIA_POR3 | timings;
#else
pcmp->pcmc_por3 = CONFIG_SYS_PCMCIA_POR3;
#endif
debug("PBR3: %08x POR3: %08x\n", pcmp->pcmc_pbr3, pcmp->pcmc_por3);
/*
* IDE 1
*/
pcmp->pcmc_pbr4 = CONFIG_SYS_PCMCIA_PBR4;
#if (CONFIG_SYS_PCMCIA_POR4 != 0)
pcmp->pcmc_por4 = CONFIG_SYS_PCMCIA_POR4 | timings;
#else
pcmp->pcmc_por4 = CONFIG_SYS_PCMCIA_POR4;
#endif
debug("PBR4: %08x POR4: %08x\n", pcmp->pcmc_pbr4, pcmp->pcmc_por4);
pcmp->pcmc_pbr5 = CONFIG_SYS_PCMCIA_PBR5;
#if (CONFIG_SYS_PCMCIA_POR5 != 0)
pcmp->pcmc_por5 = CONFIG_SYS_PCMCIA_POR5 | timings;
#else
pcmp->pcmc_por5 = CONFIG_SYS_PCMCIA_POR5;
#endif
debug("PBR5: %08x POR5: %08x\n", pcmp->pcmc_pbr5, pcmp->pcmc_por5);
pcmp->pcmc_pbr6 = CONFIG_SYS_PCMCIA_PBR6;
#if (CONFIG_SYS_PCMCIA_POR6 != 0)
pcmp->pcmc_por6 = CONFIG_SYS_PCMCIA_POR6 | timings;
#else
pcmp->pcmc_por6 = CONFIG_SYS_PCMCIA_POR6;
#endif
debug("PBR6: %08x POR6: %08x\n", pcmp->pcmc_pbr6, pcmp->pcmc_por6);
pcmp->pcmc_pbr7 = CONFIG_SYS_PCMCIA_PBR7;
#if (CONFIG_SYS_PCMCIA_POR7 != 0)
pcmp->pcmc_por7 = CONFIG_SYS_PCMCIA_POR7 | timings;
#else
pcmp->pcmc_por7 = CONFIG_SYS_PCMCIA_POR7;
#endif
debug("PBR7: %08x POR7: %08x\n", pcmp->pcmc_pbr7, pcmp->pcmc_por7);
}
int ide_preinit(void)
{
int i;
/* Initialize PIO timing tables */
for (i = 0; i <= IDE_MAX_PIO_MODE; ++i) {
pio_config_clk[i].t_setup =
PCMCIA_MK_CLKS(pio_config_ns[i].t_setup, gd->bus_clk);
pio_config_clk[i].t_length =
PCMCIA_MK_CLKS(pio_config_ns[i].t_length, gd->bus_clk);
pio_config_clk[i].t_hold =
PCMCIA_MK_CLKS(pio_config_ns[i].t_hold, gd->bus_clk);
debug("PIO Mode %d: setup=%2d ns/%d clk" " len=%3d ns/%d clk"
" hold=%2d ns/%d clk\n", i, pio_config_ns[i].t_setup,
pio_config_clk[i].t_setup, pio_config_ns[i].t_length,
pio_config_clk[i].t_length, pio_config_ns[i].t_hold,
pio_config_clk[i].t_hold);
}
return 0;
}
int ide_init_postreset(void)
{
volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
volatile pcmconf8xx_t *pcmp = &(immr->im_pcmcia);
/* PCMCIA / IDE initialization for common mem space */
pcmp->pcmc_pgcrb = 0;
/* start in PIO mode 0 - most relaxed timings */
pio_mode = 0;
set_pcmcia_timing(pio_mode);
return 0;
}
#endif /* CONFIG_IDE_8xx_DIRECT */
#ifdef CONFIG_IDE_8xx_PCCARD
int ide_preinit(void)
{
ide_devices_found = 0;
/* initialize the PCMCIA IDE adapter card */
pcmcia_on();
if (!ide_devices_found)
return 1;
udelay(1000000);/* 1 s */
return 0;
}
#endif
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