diff options
Diffstat (limited to 'cpu/arm_cortexa8/omap3/mem.c')
| -rw-r--r-- | cpu/arm_cortexa8/omap3/mem.c | 284 |
1 files changed, 284 insertions, 0 deletions
diff --git a/cpu/arm_cortexa8/omap3/mem.c b/cpu/arm_cortexa8/omap3/mem.c new file mode 100644 index 0000000..3cc22c4 --- /dev/null +++ b/cpu/arm_cortexa8/omap3/mem.c @@ -0,0 +1,284 @@ +/* + * (C) Copyright 2008 + * Texas Instruments, <www.ti.com> + * + * Author : + * Manikandan Pillai <mani.pillai@ti.com> + * + * Initial Code from: + * Richard Woodruff <r-woodruff2@ti.com> + * Syed Mohammed Khasim <khasim@ti.com> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include <common.h> +#include <asm/io.h> +#include <asm/arch/mem.h> +#include <asm/arch/sys_proto.h> +#include <command.h> + +/* + * Only One NAND allowed on board at a time. + * The GPMC CS Base for the same + */ +unsigned int boot_flash_base; +unsigned int boot_flash_off; +unsigned int boot_flash_sec; +unsigned int boot_flash_type; +volatile unsigned int boot_flash_env_addr; + +#if defined(CONFIG_CMD_NAND) +static u32 gpmc_m_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 +}; + +gpmc_csx_t *nand_cs_base; +gpmc_t *gpmc_cfg_base; + +#if defined(CONFIG_ENV_IS_IN_NAND) +#define GPMC_CS 0 +#else +#define GPMC_CS 1 +#endif + +#endif + +#if defined(CONFIG_CMD_ONENAND) +static u32 gpmc_onenand[GPMC_MAX_REG] = { + ONENAND_GPMC_CONFIG1, + ONENAND_GPMC_CONFIG2, + ONENAND_GPMC_CONFIG3, + ONENAND_GPMC_CONFIG4, + ONENAND_GPMC_CONFIG5, + ONENAND_GPMC_CONFIG6, 0 +}; + +gpmc_csx_t *onenand_cs_base; + +#if defined(CONFIG_ENV_IS_IN_ONENAND) +#define GPMC_CS 0 +#else +#define GPMC_CS 1 +#endif + +#endif + +static sdrc_t *sdrc_base = (sdrc_t *)OMAP34XX_SDRC_BASE; + +/************************************************************************** + * make_cs1_contiguous() - for es2 and above remap cs1 behind cs0 to allow + * command line mem=xyz use all memory with out discontinuous support + * compiled in. Could do it at the ATAG, but there really is two banks... + * Called as part of 2nd phase DDR init. + **************************************************************************/ +void make_cs1_contiguous(void) +{ + u32 size, a_add_low, a_add_high; + + size = get_sdr_cs_size(CS0); + size /= SZ_32M; /* find size to offset CS1 */ + a_add_high = (size & 3) << 8; /* set up low field */ + a_add_low = (size & 0x3C) >> 2; /* set up high field */ + writel((a_add_high | a_add_low), &sdrc_base->cs_cfg); + +} + +/******************************************************** + * 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 */ + + if ((val1 != 0) || (val2 != pattern)) /* see if pos A val changed */ + return 0; + else + return 1; +} + +/******************************************************** + * sdrc_init() - init the sdrc chip selects CS0 and CS1 + * - early init routines, called from flash or + * SRAM. + *******************************************************/ +void sdrc_init(void) +{ + /* only init up first bank here */ + do_sdrc_init(CS0, EARLY_INIT); +} + +/************************************************************************* + * do_sdrc_init(): initialize the SDRAM for use. + * -code sets up SDRAM basic SDRC timings for CS0 + * -optimal settings can be placed here, or redone after i2c + * inspection of board info + * + * - code called once in C-Stack only context for CS0 and a possible 2nd + * time depending on memory configuration from stack+global context + **************************************************************************/ + +void do_sdrc_init(u32 cs, u32 early) +{ + sdrc_actim_t *sdrc_actim_base; + + if(cs) + sdrc_actim_base = (sdrc_actim_t *)SDRC_ACTIM_CTRL1_BASE; + else + sdrc_actim_base = (sdrc_actim_t *)SDRC_ACTIM_CTRL0_BASE; + + if (early) { + /* reset sdrc controller */ + writel(SOFTRESET, &sdrc_base->sysconfig); + wait_on_value(RESETDONE, RESETDONE, &sdrc_base->status, + 12000000); + writel(0, &sdrc_base->sysconfig); + + /* setup sdrc to ball mux */ + writel(SDP_SDRC_SHARING, &sdrc_base->sharing); + + /* Disable Power Down of CKE cuz of 1 CKE on combo part */ + writel(SRFRONRESET | PAGEPOLICY_HIGH, &sdrc_base->power); + + writel(ENADLL | DLLPHASE_90, &sdrc_base->dlla_ctrl); + sdelay(0x20000); + } + + writel(RASWIDTH_13BITS | CASWIDTH_10BITS | ADDRMUXLEGACY | + RAMSIZE_128 | BANKALLOCATION | B32NOT16 | B32NOT16 | + DEEPPD | DDR_SDRAM, &sdrc_base->cs[cs].mcfg); + writel(ARCV | ARE_ARCV_1, &sdrc_base->cs[cs].rfr_ctrl); + writel(V_ACTIMA_165, &sdrc_actim_base->ctrla); + writel(V_ACTIMB_165, &sdrc_actim_base->ctrlb); + + writel(CMD_NOP, &sdrc_base ->cs[cs].manual); + writel(CMD_PRECHARGE, &sdrc_base->cs[cs].manual); + writel(CMD_AUTOREFRESH, &sdrc_base->cs[cs].manual); + writel(CMD_AUTOREFRESH, &sdrc_base->cs[cs].manual); + + /* + * CAS latency 3, Write Burst = Read Burst, Serial Mode, + * Burst length = 4 + */ + writel(CASL3 | BURSTLENGTH4, &sdrc_base->cs[cs].mr); + + if (!mem_ok(cs)) + writel(0, &sdrc_base->cs[cs].mcfg); +} + +void enable_gpmc_config(u32 *gpmc_config, gpmc_csx_t *gpmc_cs_base, u32 base, + u32 size) +{ + writel(0, &gpmc_cs_base->config7); + sdelay(1000); + /* Delay for settling */ + writel(gpmc_config[0], &gpmc_cs_base->config1); + writel(gpmc_config[1], &gpmc_cs_base->config2); + writel(gpmc_config[2], &gpmc_cs_base->config3); + writel(gpmc_config[3], &gpmc_cs_base->config4); + writel(gpmc_config[4], &gpmc_cs_base->config5); + writel(gpmc_config[5], &gpmc_cs_base->config6); + /* Enable the config */ + writel((((size & 0xF) << 8) | ((base >> 24) & 0x3F) | + (1 << 6)), &gpmc_cs_base->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 */ + u32 *gpmc_config = NULL; + gpmc_t *gpmc_base = (gpmc_t *)GPMC_BASE; + gpmc_csx_t *gpmc_cs_base = (gpmc_csx_t *)GPMC_CONFIG_CS0_BASE; + u32 base = 0; + u32 size = 0; + u32 f_off = CONFIG_SYS_MONITOR_LEN; + u32 f_sec = 0; + u32 config = 0; + + /* global settings */ + writel(0, &gpmc_base->irqenable); /* isr's sources masked */ + writel(0, &gpmc_base->timeout_control);/* timeout disable */ + + config = readl(&gpmc_base->config); + config &= (~0xf00); + writel(config, &gpmc_base->config); + + /* + * Disable the GPMC0 config set by ROM code + * It conflicts with our MPDB (both at 0x08000000) + */ + writel(0, &gpmc_cs_base->config7); + sdelay(1000); + +#if defined(CONFIG_CMD_NAND) /* CS 0 */ + gpmc_config = gpmc_m_nand; + gpmc_cfg_base = gpmc_base; + nand_cs_base = (gpmc_csx_t *)(GPMC_CONFIG_CS0_BASE + + (GPMC_CS * GPMC_CONFIG_WIDTH)); + base = PISMO1_NAND_BASE; + size = PISMO1_NAND_SIZE; + enable_gpmc_config(gpmc_config, nand_cs_base, base, size); +#if defined(CONFIG_ENV_IS_IN_NAND) + f_off = SMNAND_ENV_OFFSET; + f_sec = SZ_128K; + /* env setup */ + boot_flash_base = base; + boot_flash_off = f_off; + boot_flash_sec = f_sec; + boot_flash_env_addr = f_off; +#endif +#endif + +#if defined(CONFIG_CMD_ONENAND) + gpmc_config = gpmc_onenand; + onenand_cs_base = (gpmc_csx_t *)(GPMC_CONFIG_CS0_BASE + + (GPMC_CS * GPMC_CONFIG_WIDTH)); + base = PISMO1_ONEN_BASE; + size = PISMO1_ONEN_SIZE; + enable_gpmc_config(gpmc_config, onenand_cs_base, base, size); +#if defined(CONFIG_ENV_IS_IN_ONENAND) + f_off = ONENAND_ENV_OFFSET; + f_sec = SZ_128K; + /* env setup */ + boot_flash_base = base; + boot_flash_off = f_off; + boot_flash_sec = f_sec; + boot_flash_env_addr = f_off; +#endif +#endif +} |