bcm91125f_devs.c

一个很好的嵌入式linux平台下的bootloader

/*  *********************************************************************
    *  Broadcom Common Firmware Environment (CFE)
    *  
    *  Board device initialization		File: bcm91125f_devs.c
    *  
    *  This is the "C" part of the board support package.  The
    *  routines to create and initialize the console, wire up 
    *  device drivers, and do other customization live here.
    *  
    *  Author:  Mitch Lichtenberg
    *  
    *********************************************************************  
    *
    *  Copyright 2000,2001,2002,2003
    *  Broadcom Corporation. All rights reserved.
    *  
    *  This software is furnished under license and may be used and 
    *  copied only in accordance with the following terms and 
    *  conditions.  Subject to these conditions, you may download, 
    *  copy, install, use, modify and distribute modified or unmodified 
    *  copies of this software in source and/or binary form.  No title 
    *  or ownership is transferred hereby.
    *  
    *  1) Any source code used, modified or distributed must reproduce 
    *     and retain this copyright notice and list of conditions 
    *     as they appear in the source file.
    *  
    *  2) No right is granted to use any trade name, trademark, or 
    *     logo of Broadcom Corporation.  The "Broadcom Corporation" 
    *     name may not be used to endorse or promote products derived 
    *     from this software without the prior written permission of 
    *     Broadcom Corporation.
    *  
    *  3) THIS SOFTWARE IS PROVIDED "AS-IS" AND ANY EXPRESS OR
    *     IMPLIED WARRANTIES, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED
    *     WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR 
    *     PURPOSE, OR NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT 
    *     SHALL BROADCOM BE LIABLE FOR ANY DAMAGES WHATSOEVER, AND IN 
    *     PARTICULAR, BROADCOM SHALL NOT BE LIABLE FOR DIRECT, INDIRECT,
    *     INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 
    *     (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
    *     GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
    *     BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 
    *     OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR 
    *     TORT (INCLUDING NEGLIGENCE OR OTHERWISE), EVEN IF ADVISED OF 
    *     THE POSSIBILITY OF SUCH DAMAGE.
    ********************************************************************* */


#include "cfe.h"
#include "sbmips.h"
#include "env_subr.h"
#include "cfe_smbus.h"

#include "sb1250_defs.h"
#include "sb1250_regs.h"
#include "sb1250_scd.h"
#include "sb1250_smbus.h"
#include "sb1250_mac.h"

#include "bcm91125f.h"

#include "dev_newflash.h"

#include "cfe_loader.h"
#include "cfe_autoboot.h"

#include "jedec.h"

/*  *********************************************************************
    *  Devices we're importing
    ********************************************************************* */

extern cfe_driver_t sb1250_uart;		/* SB1250 serial ports */
extern cfe_driver_t sb1250_ether;		/* SB1250 MACs */

extern cfe_driver_t newflashdrv;		/* AMD-style flash */

extern cfe_smbus_t sb1250_smbus;
extern cfe_driver_t smbus_24lc128;		/* Microchip EEPROM */
extern cfe_driver_t smbus_m41t81clock;		/* M41T81 SMBus RTC */
extern cfe_driver_t smbus_at24c02;		/* Atmel SPD EEPROM */

extern cfe_driver_t sb1250_pcihost;             /* driver for host downloads */

/*  *********************************************************************
    *  Commands we're importing
    ********************************************************************* */

extern int ui_init_bcm91125fcmds(void);
extern int ui_init_bcm91125f_testcmds(void);
extern int ui_init_corecmds(void);
extern int ui_init_soccmds(void);
extern int ui_init_testcmds(void);
extern int ui_init_resetcmds(void);
extern int ui_init_phycmds(void);
extern int ui_init_tempsensorcmds(void);
extern int ui_init_toyclockcmds(void);
extern int ui_init_memtestcmds(void);
extern int ui_init_ethertestcmds(void);
extern int ui_init_flashtestcmds(void);
extern int ui_init_disktestcmds(void);
extern int ui_init_spdcmds(void);

/*  *********************************************************************
    *  Some other stuff we use
    ********************************************************************* */

extern void sb1250_show_cpu_type(void);
extern int cfe_device_download(int boot, char *options);


/*  *********************************************************************
    *  SysConfig switch settings and related parameters
    ********************************************************************* */

int board_rev;
int config_switch;

#define CONFIG_STARTUP_ENV	       	0x01	/* switch 1 */
#define CONFIG_PCI_INIT			0x02	/* switch 2 */

static int64_t blinky_timer;			/* for blinky */

/*  *********************************************************************
    *  board_console_init()
    *  
    *  Add the console device and set it to be the primary
    *  console.
    *  
    *  Input parameters: 
    *  	   nothing
    *  	   
    *  Return value:
    *  	   nothing
    ********************************************************************* */
void board_console_init(void)
{
    uint64_t syscfg = SBREADCSR(A_SCD_SYSTEM_CFG);

    /* Console */
    cfe_add_device(&sb1250_uart,A_DUART,0,0);

    board_rev = SBREADCSR(A_GPIO_READ) & GPIO_BOARD_VER_MASK;
    config_switch = G_SYS_CONFIG(syscfg) & 0x3F;

    cfe_startflags = 0;
    if (config_switch & CONFIG_PCI_INIT)
	cfe_startflags = CFE_INIT_PCI;

    cfe_set_console("uart0");

    /*
     * SMBus buses - need to be initialized before we attach
     * devices that use them.
     */

    cfe_add_smbus(&sb1250_smbus,A_SMB_BASE(0),0);
    cfe_add_smbus(&sb1250_smbus,A_SMB_BASE(1),0);
     
    /* 
     * NVRAM (environment variables)
     */

    cfe_add_device(&smbus_24lc128,BIGEEPROM0_SMBUS_CHAN,BIGEEPROM0_SMBUS_DEV,0);
    cfe_set_envdevice("eeprom0");	/* Connect NVRAM to 2nd 24lc128 */

}

/*  *********************************************************************
    *  board_device_init()
    *  
    *  Initialize and add other devices.  Add everything you need
    *  for bootstrap here, like disk drives, flash memory, UARTs,
    *  network controllers, etc.
    *  
    *  Input parameters: 
    *  	   nothing
    *  	   
    *  Return value:
    *  	   nothing
    ********************************************************************* */
void board_device_init(void)
{
    
    newflash_probe_t fprobe;

    /*
     * Print out the board version number.
     */
    printf("%s board revision %d\n", CFG_BOARDNAME,board_rev);

    /* 
     * Boot ROM (16MB), using "new" flash driver.  Partition the flash.
     *
     * Partitions are as follows:
     *
     *	2MB   - "boot"	CFE
     *  13MB  - "os"  	Linux boot area
     *  1MB   - "other"	Other
     */

    memset(&fprobe,0,sizeof(fprobe));
    fprobe.flash_phys = BOOTROM_PHYS;
    fprobe.flash_size = BOOTROM_SIZE*K64;
    fprobe.flash_flags =  FLASH_FLG_BUS8 | FLASH_FLG_DEV16;
    fprobe.flash_nparts = 3;
    fprobe.flash_parts[0].fp_size = 2*1024*1024;
    fprobe.flash_parts[0].fp_name = "boot";
    fprobe.flash_parts[1].fp_size = 13*1024*1024;
    fprobe.flash_parts[1].fp_name = "os";
    fprobe.flash_parts[2].fp_size = 0;
    fprobe.flash_parts[2].fp_name = "other";

    cfe_add_device(&newflashdrv,0,0,&fprobe);

    /*
     * SPD EEPROM. This is used to store the type of memory soldered 
     * onto the board. [eeprom1]
     */

    cfe_add_device(&smbus_at24c02,SPDEEPROM_SMBUS_CHAN,SPDEEPROM_SMBUS_DEV,0);

    /* 
     * MACs - must init after environment, since the hw address is stored there.
     *
     */
    cfe_add_device(&sb1250_ether,A_MAC_BASE_0,0,env_getenv("ETH0_HWADDR"));
    cfe_add_device(&sb1250_ether,A_MAC_BASE_1,1,env_getenv("ETH1_HWADDR"));

    /*
     * Real-time clock 
     */
    cfe_add_device(&smbus_m41t81clock,M41T81_SMBUS_CHAN,M41T81_SMBUS_DEV,0);

    /*
     * Host download interface.
     */
    cfe_add_device(&sb1250_pcihost,0,0,NULL);

    /*
     * Set variable that contains CPU speed, spit out config register
     */

    printf("Config switch: %d\n", config_switch);

    sb1250_show_cpu_type();

}



/*  *********************************************************************
    *  board_device_reset()
    *  
    *  Reset devices.  This call is done when the firmware is restarted,
    *  as might happen when an operating system exits, just before the
    *  "reset" command is applied to the installed devices.   You can
    *  do whatever board-specific things are here to keep the system
    *  stable, like stopping DMA sources, interrupts, etc.
    *  
    *  Input parameters: 
    *  	   nothing
    *  	   
    *  Return value:
    *  	   nothing
    ********************************************************************* */

void board_device_reset(void)
{
    /*Nothing to do. */
}


/*  *********************************************************************
    *  board_blinkylight(arg)
    *  
    *  Blink the LED once per second
    *  
    *  Input parameters: 
    *  	   arg - not used
    *  	   
    *  Return value:
    *  	   nothing
    ********************************************************************* */

static void board_blinkylight(void *arg)
{
    static int light = 0;
    intptr_t reg;

    if (TIMER_EXPIRED(blinky_timer)) {
	light = !light;
	reg = light ? A_GPIO_PIN_SET : A_GPIO_PIN_CLR;
	SBWRITECSR(reg,M_GPIO_DEBUG_LED);
	TIMER_SET(blinky_timer,CFE_HZ);
	}
}

/*  *********************************************************************
    *  program_spd_eeprom()
    *  
    *  Program the Atmel eeprom with SPD definitions
    *  
    *  Input parameters: 
    *      none
    *      
    *  Return value:
    *  	   0 - success
    *	  else - failure
    ********************************************************************* */
#if 0 
static int program_spd_eeprom(void);
static int program_spd_eeprom(void)
{
    unsigned char spd[JEDEC_SPD_SIZE];
    int fh;
    int res;

    memset(spd,0,JEDEC_SPD_SIZE);

    /* 
     * 128MB on MC 1 (JEDEC SDRAM) 
     * Samsung K4H561638B - 16Mx16 chips  
     *
     * Minimum tMEMCLK: 8.0ns (125Mhz max freq) 
     *
     * CS0 Geometry: 13 rows, 9 columns, 2 bankbits
     *
     * 64khz refresh, CAS Latency 2.5
     * Timing (ns):   tCK=7.50 tRAS=45 tRP=20.00 tRRD=15.0 tRCD=20.0 tRFC=auto tRC=auto
     *
     * Clock Config: Default
     */

    spd[JEDEC_SPD_MEMTYPE] = JEDEC_MEMTYPE_DDRSDRAM2;
    spd[JEDEC_SPD_ROWS] = 0x0D;
    spd[JEDEC_SPD_COLS] = 0x09;
    spd[JEDEC_SPD_BANKS] = 0x04;
    spd[JEDEC_SPD_SIDES] = 0x01;
    spd[JEDEC_SPD_WIDTH] = 0x48;

    spd[JEDEC_SPD_tCK25] = 0x75;
    spd[JEDEC_SPD_tCK20] = 0x00;
    spd[JEDEC_SPD_tCK10] = 0x00;
    spd[JEDEC_SPD_RFSH] = 0x82;
    spd[JEDEC_SPD_CASLATENCIES] = 0x08;
    spd[JEDEC_SPD_ATTRIBUTES] = 0x00;
    spd[JEDEC_SPD_tRAS] = 0x2D;
    spd[JEDEC_SPD_tRP] = 0x50;
    spd[JEDEC_SPD_tRRD] = 0x3C;
    spd[JEDEC_SPD_tRCD] = 0x50;
    spd[JEDEC_SPD_tRFC] = 0x00;
    spd[JEDEC_SPD_tRC] = 0x00;

    fh = cfe_open("eeprom1");
    if (fh <= 0) {
	xprintf("Could not open device: %s\n",cfe_errortext(fh));
	xprintf("SPD EEPROM IS NOT PROGRAMMED\n");
	return fh;
	}

    res = cfe_writeblk(fh,0,spd,JEDEC_SPD_SIZE);
    if (res != JEDEC_SPD_SIZE) {
	xprintf("Could not write to device: %s\n",cfe_errortext(fh));
	xprintf("SPD EEPROM IS NOT PROGRAMMED\n");
	return fh;
	}

    xprintf("SPD EEPROM programmed at SMBus chan: %d addr: 0x%x\n\n",SPDEEPROM_SMBUS_CHAN,
	    SPDEEPROM_SMBUS_DEV);

    cfe_close(fh);

    return 0;
}	
#endif

/*  *********************************************************************
    *  board_setup_autoboot()
    *  
    *  Set up autoboot methods.  This routine sets up the list of 
    *  places to find a boot program.
    *  
    *  Input parameters: 
    *  	   nothing
    *  
    *  Return value:
    *  	   nothing
    ********************************************************************* */
static void board_setup_autoboot(void)
{

    /*
     * If you had partitioned your flash, you could boot from it like this:
     */

    cfe_add_autoboot(CFE_AUTOBOOT_RAW,0,"flash0.os","elf","raw",NULL);

    /*
     * Now try running a script (file containing CFE commands) from
     * the TFTP server.   Your DHCP server must set option 130
     * to contain the name of the script.  Option 130 gets stored
     * in "BOOT_SCRIPT" when a DHCP reply is received.
     */

    cfe_add_autoboot(CFE_AUTOBOOT_NETWORK,LOADFLG_BATCH,
		     "eth0","raw","tftp","$BOOT_SERVER:$BOOT_SCRIPT");

    /*
     * Finally, try loading whatever the DHCP server says is the boot
     * program.  Do this as an ELF file, and failing that, try a
     * raw binary.
     */

    cfe_add_autoboot(CFE_AUTOBOOT_NETWORK,0,"eth0","elf","tftp",NULL);
    cfe_add_autoboot(CFE_AUTOBOOT_NETWORK,0,"eth0","raw","tftp",NULL);

}

/*  *********************************************************************
    *  board_final_init()
    *  
    *  Do any final initialization, such as adding commands to the
    *  user interface.
    *
    *  If you don't want a user interface, put the startup code here.  
    *  This routine is called just before CFE starts its user interface.
    *  
    *  Input parameters: 
    *  	   nothing
    *  	   
    *  Return value:
    *  	   nothing
    ********************************************************************* */

void board_final_init(void)
{

    int flag;

    ui_init_bcm91125fcmds();
    ui_init_bcm91125f_testcmds();
    ui_init_corecmds();
    ui_init_soccmds();
    ui_init_resetcmds();
    ui_init_tempsensorcmds();
    ui_init_toyclockcmds();
    ui_init_memtestcmds();
    ui_init_phycmds();
    ui_init_ethertestcmds();	 
    ui_init_flashtestcmds();
    ui_init_disktestcmds();
    ui_init_spdcmds();

    cfe_bg_add(board_blinkylight,NULL);
    TIMER_SET(blinky_timer,CFE_HZ);
    
    board_setup_autoboot();

    if (config_switch & CONFIG_STARTUP_ENV) {
	/* Change STARTUP's flags so it can run or error message if not set */
	if (env_getenv("STARTUP") == NULL) {
	    printf("*** STARTUP environment variable not set.\n\n");
	}
	else {
	    flag = env_envtype("STARTUP");
	    flag &= ~ENV_FLG_STARTUP_NORUN;
	    env_setflags("STARTUP",flag);
	    }
	}
    else {
	if (env_getenv("STARTUP") != NULL) {
	    /* Don't run the commands in STARTUP */
	    flag = env_envtype("STARTUP");
	    flag |= ENV_FLG_STARTUP_NORUN;
	    env_setflags("STARTUP",flag);
	    }
	}
}