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Diffstat (limited to 'board/omap2420h4/sys_info.c')
| -rw-r--r-- | board/omap2420h4/sys_info.c | 202 |
1 files changed, 202 insertions, 0 deletions
diff --git a/board/omap2420h4/sys_info.c b/board/omap2420h4/sys_info.c new file mode 100644 index 0000000..b5fe9e3 --- /dev/null +++ b/board/omap2420h4/sys_info.c @@ -0,0 +1,202 @@ +/* + * (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/mem.h> /* get mem tables */ +#include <asm/arch/sys_proto.h> +#include <asm/arch/sys_info.h> +#include <i2c.h> + +/************************************************************************** + * get_cpu_type() - low level get cpu type + * - no C globals yet. + * - just looking to say if this is a 2422 or 2420 or ... + * - to start with we will look at switch settings.. + * - 2422 id's same as 2420 for ES1 will rely on H4 board characteristics + * (mux for 2420, non-mux for 2422). + ***************************************************************************/ +u32 get_cpu_type(void) +{ + u32 v; + + v = __raw_readl(TAP_IDCODE_REG); + v &= CPU_24XX_ID_MASK; + if (v == CPU_2420_CHIPID) { /* currently 2420 and 2422 have same id */ + if (is_gpmc_muxed() == GPMC_MUXED) /* if mux'ed */ + return(CPU_2420); + else + return(CPU_2422); + } else + return(CPU_2420); /* don't know, say 2420 */ +} + +/****************************************** + * get_cpu_rev(void) - extract version info + ******************************************/ +u32 get_cpu_rev(void) +{ + u32 v; + v = __raw_readl(TAP_IDCODE_REG); + v = v >> 28; + return(v+1); /* currently 2422 and 2420 match up */ +} + +/*********************************************************** + * get_mem_type() - identify type of mDDR part used. + * 2422 uses stacked DDR, 2 parts CS0/CS1. + * 2420 may have 1 or 2, no good way to know...only init 1... + * when eeprom data is up we can select 1 more. + *************************************************************/ +u32 get_mem_type(void) +{ + if (get_cpu_type() == CPU_2422) + return(DDR_STACKED); + + if (get_board_type() == BOARD_H4_MENELAUS) + return(DDR_COMBO); + else + return(DDR_DISCRETE); +} + +/*********************************************************************** + * get_board_type() - get board type based on current production stats. + * --- NOTE: 2 I2C EEPROMs will someday be populated with proper info. + * when they are available we can get info from there. This should + * be correct of all known boards up until today. + ************************************************************************/ +u32 get_board_type(void) +{ + if (i2c_probe(I2C_MENELAUS) == 0) + return(BOARD_H4_MENELAUS); + else + return(BOARD_H4_SDP); +} + +/****************************************************************** + * get_sysboot_value() - get init word settings (dip switch on h4) + ******************************************************************/ +u32 get_sysboot_value(void) +{ + return(0x00000FFF & __raw_readl(CONTROL_STATUS)); +} + +/*************************************************************************** + * get_gpmc0_base() - Return current address hardware will be + * fetching from. The below effectively gives what is correct, its a bit + * mis-leading compared to the TRM. For the most general case the mask + * needs to be also taken into account this does work in practice. + * - for u-boot we currently map: + * -- 0 to nothing, + * -- 4 to flash + * -- 8 to enent + * -- c to wifi + ****************************************************************************/ +u32 get_gpmc0_base(void) +{ + u32 b; + + b = __raw_readl(GPMC_CONFIG7_0); + b &= 0x1F; /* keep base [5:0] */ + b = b << 24; /* ret 0x0b000000 */ + return(b); +} + +/***************************************************************** + * is_gpmc_muxed() - tells if address/data lines are multiplexed + *****************************************************************/ +u32 is_gpmc_muxed(void) +{ + u32 mux; + mux = get_sysboot_value(); + if (mux & BIT1) /* if mux'ed */ + return(GPMC_MUXED); + else + return(GPMC_NONMUXED); +} + +/************************************************************************ + * get_gpmc0_type() - read sysboot lines to see type of memory attached + ************************************************************************/ +u32 get_gpmc0_type(void) +{ + u32 type; + type = get_sysboot_value(); + if ((type & (BIT3|BIT2)) == (BIT3|BIT2)) + return(TYPE_NAND); + else + return(TYPE_NOR); +} + +/******************************************************************* + * get_gpmc0_width() - See if bus is in x8 or x16 (mainly for nand) + *******************************************************************/ +u32 get_gpmc0_width(void) +{ + u32 width; + width = get_sysboot_value(); + if ((width & 0xF) == (BIT3|BIT2)) + return(WIDTH_8BIT); + else + return(WIDTH_16BIT); +} + +/********************************************************************* + * wait_on_value() - common routine to allow waiting for changes in + * volatile regs. + *********************************************************************/ +u32 wait_on_value(u32 read_bit_mask, u32 match_value, u32 read_addr, u32 bound) +{ + u32 i = 0, val; + do { + ++i; + val = __raw_readl(read_addr) & read_bit_mask; + if (val == match_value) + return(1); + if (i==bound) + return(0); + } while (1); +} + +/********************************************************************* + * display_board_info() - print banner with board info. + *********************************************************************/ +void display_board_info(u32 btype) +{ + char cpu_2420[] = "2420"; + char cpu_2422[] = "2422"; + char db_men[] = "Menelaus"; + char db_ip[]= "IP"; + char *cpu_s, *db_s; + u32 cpu = get_cpu_type(); + + if(cpu == CPU_2420) + cpu_s = cpu_2420; + else + cpu_s = cpu_2422; + if(btype == BOARD_H4_MENELAUS) + db_s = db_men; + else + db_s = db_ip; + printf("TI H4 SDP Base Board with OMAP%s %s Daughter Board\n",cpu_s, db_s); +} |