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/*
* (C) Copyright 2008
* Texas Instruments, <www.ti.com>
*
* Author :
* Manikandan Pillai <mani.pillai@ti.com>
*
* Initial Code from:
* Richard Woodruff <r-woodruff2@ti.com>
* Syed Mohammed Khasim <khasim@ti.com>
*
* 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
*/
#include <common.h>
#include <asm/io.h>
#include <asm/arch/mem.h>
#include <asm/arch/sys_proto.h>
#include <command.h>
struct gpmc *gpmc_cfg;
#if defined(CONFIG_CMD_NAND)
static const u32 gpmc_m_nand[GPMC_MAX_REG] = {
M_NAND_GPMC_CONFIG1,
M_NAND_GPMC_CONFIG2,
M_NAND_GPMC_CONFIG3,
M_NAND_GPMC_CONFIG4,
M_NAND_GPMC_CONFIG5,
M_NAND_GPMC_CONFIG6, 0
};
#endif /* CONFIG_CMD_NAND */
#if defined(CONFIG_CMD_ONENAND)
static const u32 gpmc_onenand[GPMC_MAX_REG] = {
ONENAND_GPMC_CONFIG1,
ONENAND_GPMC_CONFIG2,
ONENAND_GPMC_CONFIG3,
ONENAND_GPMC_CONFIG4,
ONENAND_GPMC_CONFIG5,
ONENAND_GPMC_CONFIG6, 0
};
#endif /* CONFIG_CMD_ONENAND */
/********************************************************
* mem_ok() - test used to see if timings are correct
* for a part. Helps in guessing which part
* we are currently using.
*******************************************************/
u32 mem_ok(u32 cs)
{
u32 val1, val2, addr;
u32 pattern = 0x12345678;
addr = OMAP34XX_SDRC_CS0 + get_sdr_cs_offset(cs);
writel(0x0, addr + 0x400); /* clear pos A */
writel(pattern, addr); /* pattern to pos B */
writel(0x0, addr + 4); /* remove pattern off the bus */
val1 = readl(addr + 0x400); /* get pos A value */
val2 = readl(addr); /* get val2 */
writel(0x0, addr + 0x400); /* clear pos A */
if ((val1 != 0) || (val2 != pattern)) /* see if pos A val changed */
return 0;
else
return 1;
}
void enable_gpmc_cs_config(const u32 *gpmc_config, struct gpmc_cs *cs, u32 base,
u32 size)
{
writel(0, &cs->config7);
sdelay(1000);
/* Delay for settling */
writel(gpmc_config[0], &cs->config1);
writel(gpmc_config[1], &cs->config2);
writel(gpmc_config[2], &cs->config3);
writel(gpmc_config[3], &cs->config4);
writel(gpmc_config[4], &cs->config5);
writel(gpmc_config[5], &cs->config6);
/*
* Enable the config. size is the CS size and goes in
* bits 11:8. We set bit 6 to enable this CS and the base
* address goes into bits 5:0.
*/
writel((size << 8) | (GPMC_CS_ENABLE << 6) |
((base >> 24) & GPMC_BASEADDR_MASK),
&cs->config7);
sdelay(2000);
}
/*****************************************************
* gpmc_init(): init gpmc bus
* Init GPMC for x16, MuxMode (SDRAM in x32).
* This code can only be executed from SRAM or SDRAM.
*****************************************************/
void gpmc_init(void)
{
/* putting a blanket check on GPMC based on ZeBu for now */
gpmc_cfg = (struct gpmc *)GPMC_BASE;
#if defined(CONFIG_CMD_NAND) || defined(CONFIG_CMD_ONENAND)
const u32 *gpmc_config = NULL;
u32 base = 0;
u32 size = 0;
#endif
u32 config = 0;
/* global settings */
writel(0, &gpmc_cfg->irqenable); /* isr's sources masked */
writel(0, &gpmc_cfg->timeout_control);/* timeout disable */
config = readl(&gpmc_cfg->config);
config &= (~0xf00);
writel(config, &gpmc_cfg->config);
/*
* Disable the GPMC0 config set by ROM code
* It conflicts with our MPDB (both at 0x08000000)
*/
writel(0, &gpmc_cfg->cs[0].config7);
sdelay(1000);
#if defined(CONFIG_CMD_NAND) /* CS 0 */
gpmc_config = gpmc_m_nand;
base = PISMO1_NAND_BASE;
size = PISMO1_NAND_SIZE;
enable_gpmc_cs_config(gpmc_config, &gpmc_cfg->cs[0], base, size);
#endif
#if defined(CONFIG_CMD_ONENAND)
gpmc_config = gpmc_onenand;
base = PISMO1_ONEN_BASE;
size = PISMO1_ONEN_SIZE;
enable_gpmc_cs_config(gpmc_config, &gpmc_cfg->cs[0], base, size);
#endif
}
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