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ARM: omap: merge GPMC initialization code for all platform 

GPMC controller on TI's OMAP SoC is general purpose controller to interface
with different types of external devices like;
 - parallel NOR flash
 - parallel NAND flash
 - OneNand flash
 - SDR RAM
 - Ethernet Devices like LAN9220

Though GPMC configurations may be different for each platform depending on
clock-frequency and external device interfacing with controller. But
initialization sequence remains common across all platfoms.

Thus this patch merges gpmc_init() scattered in different arch-xx/mem.c
files into single omap-common/mem-common.c

However, actual platforms specific register config values are still sourced
from corresponding platform specific headers like;
 AM33xx: arch/arm/include/asm/arch-am33xx/mem.h
 OMAP3:  arch/arm/include/asm/arch-omap3/mem.h
 OMAP4:  arch/arm/include/asm/arch-omap4/mem.h
 OMAP4:  arch/arm/include/asm/arch-omap5/mem.h

Also, CONFIG_xx passed by board-profile decide config for which set of macros
need to be used for initialization
 CONFIG_NAND:    initialize GPMC for NAND device
 CONFIG_NOR:     initialize GPMC for NOR device
 CONFIG_ONENAND: initialize GPMC for ONENAND device

Signed-off-by: Pekon Gupta <pekon@ti.com>
[trini: define GPMC_SIZE_256M for omap3]
Signed-off-by: Tom Rini <trini@ti.com>
This commit is contained in:
pekon gupta 2014-05-08 21:43:47 +05:30 committed by Tom Rini
parent cd324a6dd2
commit a0a37183bd
6 changed files with 112 additions and 110 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
arch/arm/cpu/armv7/am33xx/Makefile
View File

@ -14,7 +14,6 @@ endif
obj-$(CONFIG_TI816X) += clock_ti816x.o
obj-y += sys_info.o
obj-y += mem.o
obj-y += ddr.o
obj-y += emif4.o
obj-y += board.o

98
arch/arm/cpu/armv7/am33xx/mem.c
View File

@ -1,98 +0,0 @@
/*
* (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>
struct gpmc *gpmc_cfg;
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 */
writel((((size & 0xF) << 8) | ((base >> 24) & 0x3F) |
(1 << 6)), &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_NOR)
/* configure GPMC for NOR */
const u32 gpmc_regs[GPMC_MAX_REG] = { STNOR_GPMC_CONFIG1,
STNOR_GPMC_CONFIG2,
STNOR_GPMC_CONFIG3,
STNOR_GPMC_CONFIG4,
STNOR_GPMC_CONFIG5,
STNOR_GPMC_CONFIG6,
STNOR_GPMC_CONFIG7
};
u32 size = GPMC_SIZE_16M;
u32 base = CONFIG_SYS_FLASH_BASE;
#elif defined(CONFIG_NAND)
/* configure GPMC for NAND */
const u32 gpmc_regs[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
};
u32 size = GPMC_SIZE_256M;
u32 base = CONFIG_SYS_NAND_BASE;
#else
const u32 gpmc_regs[GPMC_MAX_REG] = { 0, 0, 0, 0, 0, 0, 0 };
u32 size = 0;
u32 base = 0;
#endif
/* global settings */
writel(0x00000008, &gpmc_cfg->sysconfig);
writel(0x00000000, &gpmc_cfg->irqstatus);
writel(0x00000000, &gpmc_cfg->irqenable);
#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 */
enable_gpmc_cs_config(gpmc_regs, &gpmc_cfg->cs[0], base, size);
}

4
arch/arm/cpu/armv7/omap-common/Makefile
View File

@ -27,8 +27,4 @@ obj-y += boot-common.o
obj-y += lowlevel_init.o
endif
ifndef CONFIG_SPL_BUILD
ifneq ($(CONFIG_OMAP44XX)$(CONFIG_OMAP54XX),)
obj-y += mem-common.o
endif
endif

117
arch/arm/cpu/armv7/omap-common/mem-common.c
View File

@ -2,31 +2,136 @@
* (C) Copyright 2010
* Texas Instruments, <www.ti.com>
*
* Steve Sakoman <steve@sakoman.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>
struct gpmc *gpmc_cfg;
#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, 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);
}
/*****************************************************
* 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_NOR)
/* configure GPMC for NOR */
const u32 gpmc_regs[GPMC_MAX_REG] = { STNOR_GPMC_CONFIG1,
STNOR_GPMC_CONFIG2,
STNOR_GPMC_CONFIG3,
STNOR_GPMC_CONFIG4,
STNOR_GPMC_CONFIG5,
STNOR_GPMC_CONFIG6,
STNOR_GPMC_CONFIG7
};
u32 size = GPMC_SIZE_16M;
u32 base = CONFIG_SYS_FLASH_BASE;
#elif defined(CONFIG_NAND)
/* configure GPMC for NAND */
const u32 gpmc_regs[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
};
u32 size = GPMC_SIZE_256M;
u32 base = CONFIG_SYS_NAND_BASE;
#elif defined(CONFIG_CMD_ONENAND)
const u32 gpmc_regs[GPMC_MAX_REG] = { ONENAND_GPMC_CONFIG1,
ONENAND_GPMC_CONFIG2,
ONENAND_GPMC_CONFIG3,
ONENAND_GPMC_CONFIG4,
ONENAND_GPMC_CONFIG5,
ONENAND_GPMC_CONFIG6,
0
};
u32 base = PISMO1_ONEN_BASE;
u32 size = PISMO1_ONEN_SIZE;
#else
const u32 gpmc_regs[GPMC_MAX_REG] = { 0, 0, 0, 0, 0, 0, 0 };
u32 size = 0;
u32 base = 0;
#endif
/* global settings */
writel(0, &gpmc_cfg->irqenable); /* isr's sources masked */
writel(0, &gpmc_cfg->timeout_control);/* timeout disable */
writel(0x00000008, &gpmc_cfg->sysconfig);
writel(0x00000000, &gpmc_cfg->irqstatus);
writel(0x00000000, &gpmc_cfg->irqenable);
writel(0x00000000, &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
* It conflicts with our MPDB (both at 0x08000000)
*/
writel(0, &gpmc_cfg->cs[0].config7);
sdelay(1000);
/* enable chip-select specific configurations */
enable_gpmc_cs_config(gpmc_regs, &gpmc_cfg->cs[0], base, size);
}

1
arch/arm/cpu/armv7/omap3/Makefile
View File

@ -9,7 +9,6 @@ obj-y := lowlevel_init.o
obj-y += board.o
obj-y += clock.o
obj-y += mem.o
obj-y += sys_info.o
ifdef CONFIG_SPL_BUILD
obj-$(CONFIG_SPL_OMAP3_ID_NAND) += spl_id_nand.o

1
arch/arm/include/asm/arch-omap3/mem.h
View File

@ -344,6 +344,7 @@ enum {
* MAP - Map this CS to which address(GPMC address space)- Absolute address
* >>24 before being used.
*/
#define GPMC_SIZE_256M 0x0
#define GPMC_SIZE_128M 0x8
#define GPMC_SIZE_64M 0xC
#define GPMC_SIZE_32M 0xE