203 lines
6.2 KiB
C
203 lines
6.2 KiB
C
/*
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* (C) Copyright 2004
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* Texas Instruments, <www.ti.com>
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* Richard Woodruff <r-woodruff2@ti.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR /PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <asm/arch/omap2420.h>
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#include <asm/io.h>
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#include <asm/arch/bits.h>
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#include <asm/arch/mem.h> /* get mem tables */
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#include <asm/arch/sys_proto.h>
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#include <asm/arch/sys_info.h>
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#include <i2c.h>
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/**************************************************************************
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* get_cpu_type() - low level get cpu type
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* - no C globals yet.
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* - just looking to say if this is a 2422 or 2420 or ...
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* - to start with we will look at switch settings..
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* - 2422 id's same as 2420 for ES1 will rely on H4 board characteristics
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* (mux for 2420, non-mux for 2422).
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***************************************************************************/
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u32 get_cpu_type(void)
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{
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u32 v;
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v = __raw_readl(TAP_IDCODE_REG);
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v &= CPU_24XX_ID_MASK;
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if (v == CPU_2420_CHIPID) { /* currently 2420 and 2422 have same id */
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if (is_gpmc_muxed() == GPMC_MUXED) /* if mux'ed */
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return(CPU_2420);
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else
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return(CPU_2422);
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} else
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return(CPU_2420); /* don't know, say 2420 */
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}
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/******************************************
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* get_cpu_rev(void) - extract version info
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******************************************/
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u32 get_cpu_rev(void)
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{
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u32 v;
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v = __raw_readl(TAP_IDCODE_REG);
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v = v >> 28;
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return(v+1); /* currently 2422 and 2420 match up */
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}
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/***********************************************************
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* get_mem_type() - identify type of mDDR part used.
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* 2422 uses stacked DDR, 2 parts CS0/CS1.
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* 2420 may have 1 or 2, no good way to know...only init 1...
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* when eeprom data is up we can select 1 more.
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*************************************************************/
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u32 get_mem_type(void)
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{
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if (get_cpu_type() == CPU_2422)
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return(DDR_STACKED);
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if (get_board_type() == BOARD_H4_MENELAUS)
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return(DDR_COMBO);
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else
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return(DDR_DISCRETE);
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}
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/***********************************************************************
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* get_board_type() - get board type based on current production stats.
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* --- NOTE: 2 I2C EEPROMs will someday be populated with proper info.
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* when they are available we can get info from there. This should
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* be correct of all known boards up until today.
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************************************************************************/
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u32 get_board_type(void)
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{
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if (i2c_probe(I2C_MENELAUS) == 0)
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return(BOARD_H4_MENELAUS);
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else
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return(BOARD_H4_SDP);
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}
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/******************************************************************
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* get_sysboot_value() - get init word settings (dip switch on h4)
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******************************************************************/
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u32 get_sysboot_value(void)
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{
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return(0x00000FFF & __raw_readl(CONTROL_STATUS));
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}
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/***************************************************************************
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* get_gpmc0_base() - Return current address hardware will be
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* fetching from. The below effectively gives what is correct, its a bit
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* mis-leading compared to the TRM. For the most general case the mask
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* needs to be also taken into account this does work in practice.
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* - for u-boot we currently map:
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* -- 0 to nothing,
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* -- 4 to flash
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* -- 8 to enent
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* -- c to wifi
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****************************************************************************/
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u32 get_gpmc0_base(void)
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{
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u32 b;
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b = __raw_readl(GPMC_CONFIG7_0);
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b &= 0x1F; /* keep base [5:0] */
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b = b << 24; /* ret 0x0b000000 */
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return(b);
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}
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/*****************************************************************
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* is_gpmc_muxed() - tells if address/data lines are multiplexed
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*****************************************************************/
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u32 is_gpmc_muxed(void)
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{
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u32 mux;
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mux = get_sysboot_value();
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if (mux & BIT1) /* if mux'ed */
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return(GPMC_MUXED);
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else
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return(GPMC_NONMUXED);
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}
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/************************************************************************
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* get_gpmc0_type() - read sysboot lines to see type of memory attached
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************************************************************************/
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u32 get_gpmc0_type(void)
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{
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u32 type;
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type = get_sysboot_value();
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if ((type & (BIT3|BIT2)) == (BIT3|BIT2))
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return(TYPE_NAND);
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else
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return(TYPE_NOR);
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}
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/*******************************************************************
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* get_gpmc0_width() - See if bus is in x8 or x16 (mainly for nand)
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*******************************************************************/
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u32 get_gpmc0_width(void)
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{
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u32 width;
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width = get_sysboot_value();
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if ((width & 0xF) == (BIT3|BIT2))
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return(WIDTH_8BIT);
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else
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return(WIDTH_16BIT);
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}
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/*********************************************************************
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* wait_on_value() - common routine to allow waiting for changes in
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* volatile regs.
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*********************************************************************/
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u32 wait_on_value(u32 read_bit_mask, u32 match_value, u32 read_addr, u32 bound)
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{
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u32 i = 0, val;
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do {
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++i;
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val = __raw_readl(read_addr) & read_bit_mask;
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if (val == match_value)
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return(1);
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if (i==bound)
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return(0);
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} while (1);
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}
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/*********************************************************************
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* display_board_info() - print banner with board info.
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*********************************************************************/
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void display_board_info(u32 btype)
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{
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char cpu_2420[] = "2420";
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char cpu_2422[] = "2422";
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char db_men[] = "Menelaus";
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char db_ip[]= "IP";
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char *cpu_s, *db_s;
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u32 cpu = get_cpu_type();
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if(cpu == CPU_2420)
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cpu_s = cpu_2420;
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else
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cpu_s = cpu_2422;
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if(btype == BOARD_H4_MENELAUS)
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db_s = db_men;
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else
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db_s = db_ip;
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printf("TI H4 SDP Base Board with OMAP%s %s Daughter Board\n",cpu_s, db_s);
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}
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