/* * (C) Copyright 2008 * Texas Instruments, * * Author : * Manikandan Pillai * * Initial Code from: * Richard Woodruff * Syed Mohammed Khasim * * 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 #include #include #include #include /* * 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; struct gpmc *gpmc_cfg; #if defined(CONFIG_CMD_NAND) static const 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 }; #if defined(CONFIG_ENV_IS_IN_NAND) #define GPMC_CS 0 #else #define GPMC_CS 1 #endif #endif #if defined(CONFIG_CMD_ONENAND) static const 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 }; #if defined(CONFIG_ENV_IS_IN_ONENAND) #define GPMC_CS 0 #else #define GPMC_CS 1 #endif #endif static struct sdrc *sdrc_base = (struct sdrc *)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 >>= 25; /* divide by 32 MiB to 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) { struct sdrc_actim *sdrc_actim_base; if(cs) sdrc_actim_base = (struct sdrc_actim *)SDRC_ACTIM_CTRL1_BASE; else sdrc_actim_base = (struct sdrc_actim *)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_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_CMD_NAND) || defined(CONFIG_CMD_ONENAND) const u32 *gpmc_config = NULL; u32 base = 0; u32 size = 0; #if defined(CONFIG_ENV_IS_IN_NAND) || defined(CONFIG_ENV_IS_IN_ONENAND) u32 f_off = CONFIG_SYS_MONITOR_LEN; u32 f_sec = 0; #endif #endif u32 config = 0; /* global settings */ writel(0, &gpmc_cfg->irqenable); /* isr's sources masked */ writel(0, &gpmc_cfg->timeout_control);/* timeout disable */ config = readl(&gpmc_cfg->config); config &= (~0xf00); writel(config, &gpmc_cfg->config); /* * 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); #if defined(CONFIG_CMD_NAND) /* CS 0 */ gpmc_config = gpmc_m_nand; base = PISMO1_NAND_BASE; size = PISMO1_NAND_SIZE; enable_gpmc_cs_config(gpmc_config, &gpmc_cfg->cs[0], base, size); #if defined(CONFIG_ENV_IS_IN_NAND) f_off = SMNAND_ENV_OFFSET; f_sec = (128 << 10); /* 128 KiB */ /* 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; base = PISMO1_ONEN_BASE; size = PISMO1_ONEN_SIZE; enable_gpmc_cs_config(gpmc_config, &gpmc_cfg->cs[0], base, size); #if defined(CONFIG_ENV_IS_IN_ONENAND) f_off = ONENAND_ENV_OFFSET; f_sec = (128 << 10); /* 128 KiB */ /* env setup */ boot_flash_base = base; boot_flash_off = f_off; boot_flash_sec = f_sec; boot_flash_env_addr = f_off; #endif #endif }