diff options
Diffstat (limited to 'board/ti/omap2420h4/mem.c')
| -rw-r--r-- | board/ti/omap2420h4/mem.c | 362 |
1 files changed, 0 insertions, 362 deletions
diff --git a/board/ti/omap2420h4/mem.c b/board/ti/omap2420h4/mem.c deleted file mode 100644 index b0832389ee..0000000000 --- a/board/ti/omap2420h4/mem.c +++ /dev/null @@ -1,362 +0,0 @@ -/* - * (C) Copyright 2004 - * Texas Instruments, <www.ti.com> - * Richard Woodruff <r-woodruff2@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/arch/omap2420.h> -#include <asm/io.h> -#include <asm/arch/bits.h> -#include <asm/arch/mux.h> -#include <asm/arch/mem.h> -#include <asm/arch/clock.h> -#include <asm/arch/sys_proto.h> -#include <asm/arch/sys_info.h> - -/************************************************************ - * sdelay() - simple spin loop. Will be constant time as - * its generally used in 12MHz bypass conditions only. This - * is necessary until timers are accessible. - * - * not inline to increase chances its in cache when called - *************************************************************/ -void sdelay (unsigned long loops) -{ - __asm__ volatile ("1:\n" "subs %0, %1, #1\n" - "bne 1b":"=r" (loops):"0" (loops)); -} - -/********************************************************************************* - * prcm_init() - inits clocks for PRCM as defined in clocks.h (config II default). - * -- called from SRAM, or Flash (using temp SRAM stack). - *********************************************************************************/ -void prcm_init(void) -{ - u32 div; - void (*f_lock_pll) (u32, u32, u32, u32); - extern void *_end_vect, *_start; - - f_lock_pll = (void *)((u32)&_end_vect - (u32)&_start + SRAM_VECT_CODE); - - __raw_writel(0, CM_FCLKEN1_CORE); /* stop all clocks to reduce ringing */ - __raw_writel(0, CM_FCLKEN2_CORE); /* may not be necessary */ - __raw_writel(0, CM_ICLKEN1_CORE); - __raw_writel(0, CM_ICLKEN2_CORE); - - __raw_writel(DPLL_OUT, CM_CLKSEL2_PLL); /* set DPLL out */ - __raw_writel(MPU_DIV, CM_CLKSEL_MPU); /* set MPU divider */ - __raw_writel(DSP_DIV, CM_CLKSEL_DSP); /* set dsp and iva dividers */ - __raw_writel(GFX_DIV, CM_CLKSEL_GFX); /* set gfx dividers */ - - div = BUS_DIV; - __raw_writel(div, CM_CLKSEL1_CORE);/* set L3/L4/USB/Display/Vlnc/SSi dividers */ - sdelay(1000); - - if(running_in_sram()){ - /* If running fully from SRAM this is OK. The Flash bus drops out for just a little. - * but then comes back. If running from Flash this sequence kills you, thus you need - * to run it using CONFIG_PARTIAL_SRAM. - */ - __raw_writel(MODE_BYPASS_FAST, CM_CLKEN_PLL); /* go to bypass, fast relock */ - wait_on_value(BIT0|BIT1, BIT0, CM_IDLEST_CKGEN, LDELAY); /* wait till in bypass */ - sdelay(1000); - /* set clock selection and dpll dividers. */ - __raw_writel(DPLL_VAL, CM_CLKSEL1_PLL); /* set pll for target rate */ - __raw_writel(COMMIT_DIVIDERS, PRCM_CLKCFG_CTRL); /* commit dividers */ - sdelay(10000); - __raw_writel(DPLL_LOCK, CM_CLKEN_PLL); /* enable dpll */ - sdelay(10000); - wait_on_value(BIT0|BIT1, BIT1, CM_IDLEST_CKGEN, LDELAY); /*wait for dpll lock */ - }else if(running_in_flash()){ - /* if running from flash, need to jump to small relocated code area in SRAM. - * This is the only safe spot to do configurations from. - */ - (*f_lock_pll)(PRCM_CLKCFG_CTRL, CM_CLKEN_PLL, DPLL_LOCK, CM_IDLEST_CKGEN); - } - - __raw_writel(DPLL_LOCK|APLL_LOCK, CM_CLKEN_PLL); /* enable apll */ - wait_on_value(BIT8, BIT8, CM_IDLEST_CKGEN, LDELAY); /* wait for apll lock */ - sdelay(1000); -} - -/************************************************************************** - * make_cs1_contiguous() - for es2 and above remap cs1 behind cs0 to allow - * command line mem=xyz use all memory with out discontigious 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(SDRC_CS0_OSET); - 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 */ - __raw_writel((a_add_high|a_add_low),SDRC_CS_CFG); - -} - -/******************************************************** - * mem_ok() - test used to see if timings are correct - * for a part. Helps in gussing which part - * we are currently using. - *******************************************************/ -u32 mem_ok(void) -{ - u32 val1, val2; - u32 pattern = 0x12345678; - - __raw_writel(0x0,OMAP2420_SDRC_CS0+0x400); /* clear pos A */ - __raw_writel(pattern, OMAP2420_SDRC_CS0); /* pattern to pos B */ - __raw_writel(0x0,OMAP2420_SDRC_CS0+4); /* remove pattern off the bus */ - val1 = __raw_readl(OMAP2420_SDRC_CS0+0x400); /* get pos A value */ - val2 = __raw_readl(OMAP2420_SDRC_CS0); /* get val2 */ - - if ((val1 != 0) || (val2 != pattern)) /* see if pos A value 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) -{ - #define EARLY_INIT 1 - do_sdrc_init(SDRC_CS0_OSET, EARLY_INIT); /* only init up first bank here */ -} - -/************************************************************************* - * do_sdrc_init(): initialize the SDRAM for use. - * -called from low level code with stack only. - * -code sets up SDRAM timing and muxing for 2422 or 2420. - * -optimal settings can be placed here, or redone after i2c - * inspection of board info - * - * This is a bit ugly, but should handle all memory moduels - * used with the H4. The first time though this code from s_init() - * we configure the first chip select. Later on we come back and - * will configure the 2nd chip select if it exists. - * - **************************************************************************/ -void do_sdrc_init(u32 offset, u32 early) -{ - u32 cpu, dllen=0, rev, common=0, cs0=0, pmask=0, pass_type, mtype; - sdrc_data_t *sdata; /* do not change type */ - u32 a, b, r; - - static const sdrc_data_t sdrc_2422 = - { - H4_2422_SDRC_SHARING, H4_2422_SDRC_MDCFG_0_DDR, 0 , H4_2422_SDRC_ACTIM_CTRLA_0, - H4_2422_SDRC_ACTIM_CTRLB_0, H4_2422_SDRC_RFR_CTRL, H4_2422_SDRC_MR_0_DDR, - 0, H4_2422_SDRC_DLLAB_CTRL - }; - static const sdrc_data_t sdrc_2420 = - { - H4_2420_SDRC_SHARING, H4_2420_SDRC_MDCFG_0_DDR, H4_2420_SDRC_MDCFG_0_SDR, - H4_2420_SDRC_ACTIM_CTRLA_0, H4_2420_SDRC_ACTIM_CTRLB_0, - H4_2420_SDRC_RFR_CTRL, H4_2420_SDRC_MR_0_DDR, H4_2420_SDRC_MR_0_SDR, - H4_2420_SDRC_DLLAB_CTRL - }; - - if (offset == SDRC_CS0_OSET) - cs0 = common = 1; /* int regs shared between both chip select */ - - cpu = get_cpu_type(); - rev = get_cpu_rev(); - - /* warning generated, though code generation is correct. this may bite later, - * but is ok for now. there is only so much C code you can do on stack only - * operation. - */ - if (cpu == CPU_2422){ - sdata = (sdrc_data_t *)&sdrc_2422; - pass_type = STACKED; - } else{ - sdata = (sdrc_data_t *)&sdrc_2420; - pass_type = IP_DDR; - } - - __asm__ __volatile__("": : :"memory"); /* limit compiler scope */ - - if (!early && (((mtype = get_mem_type()) == DDR_COMBO)||(mtype == DDR_STACKED))) { - if(mtype == DDR_COMBO){ - pmask = BIT2;/* combo part has a shared CKE signal, can't use feature */ - pass_type = COMBO_DDR; /* CS1 config */ - __raw_writel((__raw_readl(SDRC_POWER)) & ~pmask, SDRC_POWER); - } - if(rev != CPU_2420_2422_ES1) /* for es2 and above smooth things out */ - make_cs1_contiguous(); - } - -next_mem_type: - if (common) { /* do a SDRC reset between types to clear regs*/ - __raw_writel(SOFTRESET, SDRC_SYSCONFIG); /* reset sdrc */ - wait_on_value(BIT0, BIT0, SDRC_STATUS, 12000000);/* wait till reset done set */ - __raw_writel(0, SDRC_SYSCONFIG); /* clear soft reset */ - __raw_writel(sdata->sdrc_sharing, SDRC_SHARING); -#ifdef POWER_SAVE - __raw_writel(__raw_readl(SMS_SYSCONFIG)|SMART_IDLE, SMS_SYSCONFIG); - __raw_writel(sdata->sdrc_sharing|SMART_IDLE, SDRC_SHARING); - __raw_writel((__raw_readl(SDRC_POWER)|BIT6), SDRC_POWER); -#endif - } - - if ((pass_type == IP_DDR) || (pass_type == STACKED)) /* (IP ddr-CS0),(2422-CS0/CS1) */ - __raw_writel(sdata->sdrc_mdcfg_0_ddr, SDRC_MCFG_0+offset); - else if (pass_type == COMBO_DDR){ /* (combo-CS0/CS1) */ - __raw_writel(H4_2420_COMBO_MDCFG_0_DDR,SDRC_MCFG_0+offset); - } else if (pass_type == IP_SDR){ /* ip sdr-CS0 */ - __raw_writel(sdata->sdrc_mdcfg_0_sdr, SDRC_MCFG_0+offset); - } - - a = sdata->sdrc_actim_ctrla_0; - b = sdata->sdrc_actim_ctrlb_0; - r = sdata->sdrc_dllab_ctrl; - - /* work around ES1 DDR issues */ - if((pass_type != IP_SDR) && (rev == CPU_2420_2422_ES1)){ - a = H4_242x_SDRC_ACTIM_CTRLA_0_ES1; - b = H4_242x_SDRC_ACTIM_CTRLB_0_ES1; - r = H4_242x_SDRC_RFR_CTRL_ES1; - } - - if (cs0) { - __raw_writel(a, SDRC_ACTIM_CTRLA_0); - __raw_writel(b, SDRC_ACTIM_CTRLB_0); - } else { - __raw_writel(a, SDRC_ACTIM_CTRLA_1); - __raw_writel(b, SDRC_ACTIM_CTRLB_1); - } - __raw_writel(r, SDRC_RFR_CTRL+offset); - - /* init sequence for mDDR/mSDR using manual commands (DDR is a bit different) */ - __raw_writel(CMD_NOP, SDRC_MANUAL_0+offset); - sdelay(5000); /* susposed to be 100us per design spec for mddr/msdr */ - __raw_writel(CMD_PRECHARGE, SDRC_MANUAL_0+offset); - __raw_writel(CMD_AUTOREFRESH, SDRC_MANUAL_0+offset); - __raw_writel(CMD_AUTOREFRESH, SDRC_MANUAL_0+offset); - - /* - * CSx SDRC Mode Register - * Burst length = (4 - DDR) (2-SDR) - * Serial mode - * CAS latency = x - */ - if(pass_type == IP_SDR) - __raw_writel(sdata->sdrc_mr_0_sdr, SDRC_MR_0+offset); - else - __raw_writel(sdata->sdrc_mr_0_ddr, SDRC_MR_0+offset); - - /* NOTE: ES1 242x _BUG_ DLL + External Bandwidth fix*/ - if (rev == CPU_2420_2422_ES1){ - dllen = (BIT0|BIT3); /* es1 clear both bit0 and bit3 */ - __raw_writel((__raw_readl(SMS_CLASS_ARB0)|BURSTCOMPLETE_GROUP7) - ,SMS_CLASS_ARB0);/* enable bust complete for lcd */ - } - else - dllen = BIT0|BIT1; /* es2, clear bit0, and 1 (set phase to 72) */ - - /* enable & load up DLL with good value for 75MHz, and set phase to 90 - * ES1 recommends 90 phase, ES2 recommends 72 phase. - */ - if (common && (pass_type != IP_SDR)) { - __raw_writel(sdata->sdrc_dllab_ctrl, SDRC_DLLA_CTRL); - __raw_writel(sdata->sdrc_dllab_ctrl & ~(BIT2|dllen), SDRC_DLLA_CTRL); - __raw_writel(sdata->sdrc_dllab_ctrl, SDRC_DLLB_CTRL); - __raw_writel(sdata->sdrc_dllab_ctrl & ~(BIT2|dllen) , SDRC_DLLB_CTRL); - } - sdelay(90000); - - if(mem_ok()) - return; /* STACKED, other configued type */ - ++pass_type; /* IPDDR->COMBODDR->IPSDR for CS0 */ - goto next_mem_type; -} - -/***************************************************** - * 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) -{ - u32 mux=0, mtype, mwidth, rev, tval; - - rev = get_cpu_rev(); - if (rev == CPU_2420_2422_ES1) - tval = 1; - else - tval = 0; /* disable bit switched meaning */ - - /* global settings */ - __raw_writel(0x10, GPMC_SYSCONFIG); /* smart idle */ - __raw_writel(0x0, GPMC_IRQENABLE); /* isr's sources masked */ - __raw_writel(tval, GPMC_TIMEOUT_CONTROL);/* timeout disable */ -#ifdef CONFIG_SYS_NAND_BOOT - __raw_writel(0x001, GPMC_CONFIG); /* set nWP, disable limited addr */ -#else - __raw_writel(0x111, GPMC_CONFIG); /* set nWP, disable limited addr */ -#endif - - /* discover bus connection from sysboot */ - if (is_gpmc_muxed() == GPMC_MUXED) - mux = BIT9; - mtype = get_gpmc0_type(); - mwidth = get_gpmc0_width(); - - /* setup cs0 */ - __raw_writel(0x0, GPMC_CONFIG7_0); /* disable current map */ - sdelay(1000); - -#ifdef CONFIG_SYS_NAND_BOOT - __raw_writel(H4_24XX_GPMC_CONFIG1_0|mtype|mwidth, GPMC_CONFIG1_0); -#else - __raw_writel(H4_24XX_GPMC_CONFIG1_0|mux|mtype|mwidth, GPMC_CONFIG1_0); -#endif - -#ifdef PRCM_CONFIG_III - __raw_writel(H4_24XX_GPMC_CONFIG2_0, GPMC_CONFIG2_0); -#endif - __raw_writel(H4_24XX_GPMC_CONFIG3_0, GPMC_CONFIG3_0); - __raw_writel(H4_24XX_GPMC_CONFIG4_0, GPMC_CONFIG4_0); -#ifdef PRCM_CONFIG_III - __raw_writel(H4_24XX_GPMC_CONFIG5_0, GPMC_CONFIG5_0); - __raw_writel(H4_24XX_GPMC_CONFIG6_0, GPMC_CONFIG6_0); -#endif - __raw_writel(H4_24XX_GPMC_CONFIG7_0, GPMC_CONFIG7_0);/* enable new mapping */ - sdelay(2000); - - /* setup cs1 */ - __raw_writel(0, GPMC_CONFIG7_1); /* disable any mapping */ - sdelay(1000); - __raw_writel(H4_24XX_GPMC_CONFIG1_1|mux, GPMC_CONFIG1_1); - __raw_writel(H4_24XX_GPMC_CONFIG2_1, GPMC_CONFIG2_1); - __raw_writel(H4_24XX_GPMC_CONFIG3_1, GPMC_CONFIG3_1); - __raw_writel(H4_24XX_GPMC_CONFIG4_1, GPMC_CONFIG4_1); - __raw_writel(H4_24XX_GPMC_CONFIG5_1, GPMC_CONFIG5_1); - __raw_writel(H4_24XX_GPMC_CONFIG6_1, GPMC_CONFIG6_1); - __raw_writel(H4_24XX_GPMC_CONFIG7_1, GPMC_CONFIG7_1); /* enable mapping */ - sdelay(2000); -} |