diff options
author | Tom Rini <trini@konsulko.com> | 2016-11-07 21:34:54 -0500 |
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committer | Tom Rini <trini@konsulko.com> | 2016-11-21 14:07:29 -0500 |
commit | 983e37007da506e8145f9b3a9e1dce5c11116fb0 (patch) | |
tree | c1d5449e1c56e17f22bb4f75b6f11336abca41a4 /arch/arm/mach-omap2/mem-common.c | |
parent | 272686eb7576c02df4616bcf893fde993e7ba57e (diff) |
arm: Introduce arch/arm/mach-omap2 for OMAP2 derivative platforms
This moves what was in arch/arm/cpu/armv7/omap-common in to
arch/arm/mach-omap2 and moves
arch/arm/cpu/armv7/{am33xx,omap3,omap4,omap5} in to arch/arm/mach-omap2
as subdirectories. All refernces to the former locations are updated to
the current locations. For the logic to decide what our outputs are,
consolidate the tests into a single config.mk rather than including 4.
Signed-off-by: Tom Rini <trini@konsulko.com>
Diffstat (limited to 'arch/arm/mach-omap2/mem-common.c')
-rw-r--r-- | arch/arm/mach-omap2/mem-common.c | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/mem-common.c b/arch/arm/mach-omap2/mem-common.c new file mode 100644 index 00000000000..d72e82e0283 --- /dev/null +++ b/arch/arm/mach-omap2/mem-common.c @@ -0,0 +1,174 @@ +/* + * (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); +} |