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/*
* (C) Copyright 2010
* Texas Instruments, <www.ti.com>
*
* Author :
* Mansoor Ahamed <mansoor.ahamed@ti.com>
*
* Initial Code from:
* Manikandan Pillai <mani.pillai@ti.com>
* Richard Woodruff <r-woodruff2@ti.com>
* Syed Mohammed Khasim <khasim@ti.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/io.h>
#include <asm/arch/cpu.h>
#include <asm/arch/mem.h>
#include <asm/arch/sys_proto.h>
#include <command.h>
#include <linux/mtd/omap_gpmc.h>
#include <jffs2/load_kernel.h>
const struct gpmc *gpmc_cfg = (struct gpmc *)GPMC_BASE;
#if defined(CONFIG_NOR)
char gpmc_cs0_flash = MTD_DEV_TYPE_NOR;
#elif defined(CONFIG_NAND) || defined(CONFIG_CMD_NAND)
char gpmc_cs0_flash = MTD_DEV_TYPE_NAND;
#elif defined(CONFIG_CMD_ONENAND)
char gpmc_cs0_flash = MTD_DEV_TYPE_ONENAND;
#else
char gpmc_cs0_flash = -1;
#endif
#if defined(CONFIG_OMAP34XX)
/********************************************************
* 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;
}
#endif
void enable_gpmc_cs_config(const u32 *gpmc_config, const 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 */
writel((((size & 0xF) << 8) | ((base >> 24) & 0x3F) |
(1 << 6)), &cs->config7);
sdelay(2000);
}
void set_gpmc_cs0(int flash_type)
{
const u32 *gpmc_regs;
u32 base, size;
#if defined(CONFIG_NOR)
const u32 gpmc_regs_nor[GPMC_MAX_REG] = {
STNOR_GPMC_CONFIG1,
STNOR_GPMC_CONFIG2,
STNOR_GPMC_CONFIG3,
STNOR_GPMC_CONFIG4,
STNOR_GPMC_CONFIG5,
STNOR_GPMC_CONFIG6,
STNOR_GPMC_CONFIG7
};
#endif
#if defined(CONFIG_NAND) || defined(CONFIG_CMD_NAND)
const u32 gpmc_regs_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
#if defined(CONFIG_CMD_ONENAND)
const u32 gpmc_regs_onenand[GPMC_MAX_REG] = {
ONENAND_GPMC_CONFIG1,
ONENAND_GPMC_CONFIG2,
ONENAND_GPMC_CONFIG3,
ONENAND_GPMC_CONFIG4,
ONENAND_GPMC_CONFIG5,
ONENAND_GPMC_CONFIG6,
0
};
#endif
switch (flash_type) {
#if defined(CONFIG_NOR)
case MTD_DEV_TYPE_NOR:
gpmc_regs = gpmc_regs_nor;
base = CONFIG_SYS_FLASH_BASE;
size = (CONFIG_SYS_FLASH_SIZE > 0x08000000) ? GPMC_SIZE_256M :
((CONFIG_SYS_FLASH_SIZE > 0x04000000) ? GPMC_SIZE_128M :
((CONFIG_SYS_FLASH_SIZE > 0x02000000) ? GPMC_SIZE_64M :
((CONFIG_SYS_FLASH_SIZE > 0x01000000) ? GPMC_SIZE_32M :
GPMC_SIZE_16M)));
break;
#endif
#if defined(CONFIG_NAND) || defined(CONFIG_CMD_NAND)
case MTD_DEV_TYPE_NAND:
gpmc_regs = gpmc_regs_nand;
base = CONFIG_SYS_NAND_BASE;
size = GPMC_SIZE_16M;
break;
#endif
#if defined(CONFIG_CMD_ONENAND)
case MTD_DEV_TYPE_ONENAND:
gpmc_regs = gpmc_regs_onenand;
base = CONFIG_SYS_ONENAND_BASE;
size = GPMC_SIZE_128M;
break;
#endif
default:
/* disable the GPMC0 config set by ROM code */
writel(0, &gpmc_cfg->cs[0].config7);
sdelay(1000);
return;
}
/* enable chip-select specific configurations */
enable_gpmc_cs_config(gpmc_regs, &gpmc_cfg->cs[0], base, size);
}
/*****************************************************
* 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)
{
/* global settings */
writel(0x00000008, &gpmc_cfg->sysconfig);
writel(0x00000000, &gpmc_cfg->irqstatus);
writel(0x00000000, &gpmc_cfg->irqenable);
/* disable timeout, set a safe reset value */
writel(0x00001ff0, &gpmc_cfg->timeout_control);
writel(gpmc_cs0_flash == MTD_DEV_TYPE_NOR ?
0x00000200 : 0x00000012, &gpmc_cfg->config);
set_gpmc_cs0(gpmc_cs0_flash);
}
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