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armv7: armv7: introduce set_gpmc_cs0

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Allow boards to runtime detect flash type.

Signed-off-by: Ladislav Michl <ladis@linux-mips.org>
This commit is contained in:
Ladislav Michl 2016-07-12 20:28:17 +02:00 • committed by Tom Rini
parent 0568dd0663
commit 22d6ac490e
3 changed files with 92 additions and 58 deletions
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114
arch/arm/cpu/armv7/omap-common/mem-common.c
View file

@ -20,9 +20,20 @@
#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
@ -68,16 +79,13 @@ void enable_gpmc_cs_config(const u32 *gpmc_config, const struct gpmc_cs *cs,
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)
void set_gpmc_cs0(int flash_type)
{
const u32 *gpmc_regs;
u32 base, size;
#if defined(CONFIG_NOR)
/* configure GPMC for NOR */
const u32 gpmc_regs[GPMC_MAX_REG] = { STNOR_GPMC_CONFIG1,
const u32 gpmc_regs_nor[GPMC_MAX_REG] = {
STNOR_GPMC_CONFIG1,
STNOR_GPMC_CONFIG2,
STNOR_GPMC_CONFIG3,
STNOR_GPMC_CONFIG4,
@ -85,15 +93,10 @@ void gpmc_init(void)
STNOR_GPMC_CONFIG6,
STNOR_GPMC_CONFIG7
};
u32 base = CONFIG_SYS_FLASH_BASE;
u32 size = (CONFIG_SYS_FLASH_SIZE > 0x08000000) ? GPMC_SIZE_256M :
/* > 64MB */ ((CONFIG_SYS_FLASH_SIZE > 0x04000000) ? GPMC_SIZE_128M :
/* > 32MB */ ((CONFIG_SYS_FLASH_SIZE > 0x02000000) ? GPMC_SIZE_64M :
/* > 16MB */ ((CONFIG_SYS_FLASH_SIZE > 0x01000000) ? GPMC_SIZE_32M :
/* min 16MB */ GPMC_SIZE_16M)));
#elif defined(CONFIG_NAND) || defined(CONFIG_CMD_NAND)
/* configure GPMC for NAND */
const u32 gpmc_regs[GPMC_MAX_REG] = { M_NAND_GPMC_CONFIG1,
#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,
@ -101,11 +104,10 @@ void gpmc_init(void)
M_NAND_GPMC_CONFIG6,
0
};
u32 base = CONFIG_SYS_NAND_BASE;
u32 size = GPMC_SIZE_16M;
#elif defined(CONFIG_CMD_ONENAND)
const u32 gpmc_regs[GPMC_MAX_REG] = { ONENAND_GPMC_CONFIG1,
#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,
@ -113,30 +115,60 @@ void gpmc_init(void)
ONENAND_GPMC_CONFIG6,
0
};
u32 size = GPMC_SIZE_128M;
u32 base = CONFIG_SYS_ONENAND_BASE;
#else
const u32 gpmc_regs[GPMC_MAX_REG] = { 0, 0, 0, 0, 0, 0, 0 };
u32 size = 0;
u32 base = 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);
#ifdef CONFIG_NOR
writel(0x00000200, &gpmc_cfg->config);
#else
writel(0x00000012, &gpmc_cfg->config);
#endif
/*
* Disable the GPMC0 config set by ROM code
*/
writel(0, &gpmc_cfg->cs[0].config7);
sdelay(1000);
/* enable chip-select specific configurations */
if (base != 0)
enable_gpmc_cs_config(gpmc_regs, &gpmc_cfg->cs[0], base, size);
writel(gpmc_cs0_flash == MTD_DEV_TYPE_NOR ?
0x00000200 : 0x00000012, &gpmc_cfg->config);
set_gpmc_cs0(gpmc_cs0_flash);
}

1
arch/arm/include/asm/arch-omap3/sys_proto.h
View file

@ -45,6 +45,7 @@ void emif4_init(void);
void gpmc_init(void);
void enable_gpmc_cs_config(const u32 *gpmc_config, const struct gpmc_cs *cs,
u32 base, u32 size);
void set_gpmc_cs0(int flash_type);
void watchdog_init(void);
void set_muxconf_regs(void);

1
include/linux/mtd/omap_gpmc.h
View file

@ -93,5 +93,6 @@ struct gpmc {
/* Used for board specific gpmc initialization */
extern const struct gpmc *gpmc_cfg;
extern char gpmc_cs0_flash;
#endif /* __ASM_OMAP_GPMC_H */