diff options
author | pekon gupta <pekon@ti.com> | 2014-05-08 21:43:47 +0530 |
---|---|---|
committer | Tom Rini <trini@ti.com> | 2014-05-23 19:39:36 -0400 |
commit | a0a37183bd75e74608bc78c8d0e2a34454f95a91 (patch) | |
tree | b9505eae7d21e6c518e94011fd115ec14e30bcea /arch/arm/cpu/armv7/omap-common/mem-common.c | |
parent | cd324a6dd252856fa55bd17d539a9466ae86411a (diff) | |
download | u-boot-a0a37183bd75e74608bc78c8d0e2a34454f95a91.tar.gz u-boot-a0a37183bd75e74608bc78c8d0e2a34454f95a91.tar.xz u-boot-a0a37183bd75e74608bc78c8d0e2a34454f95a91.zip |
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>
Diffstat (limited to 'arch/arm/cpu/armv7/omap-common/mem-common.c')
-rw-r--r-- | arch/arm/cpu/armv7/omap-common/mem-common.c | 117 |
1 files changed, 111 insertions, 6 deletions
diff --git a/arch/arm/cpu/armv7/omap-common/mem-common.c b/arch/arm/cpu/armv7/omap-common/mem-common.c index afc1bc185e..944ef840a1 100644 --- a/arch/arm/cpu/armv7/omap-common/mem-common.c +++ b/arch/arm/cpu/armv7/omap-common/mem-common.c @@ -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); } |