swarm_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: swarm_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 "cfe_smbus.h"
#include "env_subr.h"

#include "sb1250_defs.h"
#include "sb1250_regs.h"
#include "sb1250_scd.h"
#include "sb1250_smbus.h"
#include "sb1250_wid.h"

#include "swarm.h"
#include "dev_ide.h"

#include "dev_newflash.h"

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

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

extern cfe_driver_t promice_uart;		/* promice serial port */
extern cfe_driver_t sb1250_uart;		/* SB1250 serial ports */
extern cfe_driver_t sb1250_ether;		/* SB1250 MACs */
extern cfe_driver_t newflashdrv;		/* flash */
extern cfe_driver_t idedrv;			/* IDE disk */
extern cfe_driver_t pcmciadrv;			/* PCMCIA card */
#if CFG_PCI
extern void pci_add_devices(int init);          /* driver collection du jour */
#endif
#if CFG_TCP
extern cfe_driver_t tcpconsole;			/* TCP/IP console */
#endif
#if CFG_VGACONSOLE
extern cfe_driver_t pcconsole2;			/* VGA Console */
static int vgainit_ok = FALSE;
extern int vga_biosinit(void);
#endif
#if CFG_USB
extern int usb_init(uint32_t addr);
extern cfe_driver_t usb_disk;			/* USB mass-storage */
extern cfe_driver_t usb_uart;			/* USB serial ports */
#endif

extern cfe_smbus_t sb1250_smbus;		/* BCM1250 SMBus controller */

extern cfe_driver_t smbus_24lc128;		/* Microchip 24lc128 eeprom */
extern cfe_driver_t smbus_x1241clock;		/* Xicor clock */
extern cfe_driver_t smbus_m41t81clock;		/* ST Micro clock */
extern cfe_driver_t smbus_x1240eeprom;		/* Xicor EEPROM */

/*  *********************************************************************
    *  UI command initialization
    ********************************************************************* */

extern void ui_init_cpu1cmds(void);
extern void ui_init_swarmcmds(void);
extern int ui_init_corecmds(void);
extern int ui_init_soccmds(void);
extern int ui_init_testcmds(void);
extern int ui_init_tempsensorcmds(void);
extern int ui_init_toyclockcmds(void);
extern int ui_init_memtestcmds(void);
extern int ui_init_resetcmds(void);
extern int ui_init_phycmds(void);
extern int ui_init_spdcmds(void);
extern int ui_init_disktestcmds(void);
extern int ui_init_ethertestcmds(void);
extern int ui_init_flashtestcmds(void);

#if CFG_USB
extern int ui_init_usbcmds(void);
#endif

/*  *********************************************************************
    *  Other externs
    ********************************************************************* */

extern void sb1250_show_cpu_type(void);

/*  *********************************************************************
    *  Some board-specific parameters
    ********************************************************************* */

/*
 * Note!  Configure the PROMICE for burst mode zero (one byte per
 * access).
 */

#define PROMICE_BASE	(0x1FDFFC00)
#define PROMICE_WORDSIZE 1

#define REAL_BOOTROM_SIZE	(2*1024*1024)	/* region is 4MB, but rom is 2MB */

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

int swarm_board_rev;
int swarm_config_switch;

#define SWARM_PROMICE_CONSOLE	0x00000001
#define SWARM_VGA_CONSOLE	0x00000002

const unsigned int swarm_startflags[16] = {
    0,						/* 0 : UART console, no PCI */
    SWARM_PROMICE_CONSOLE,			/* 1 : PromICE console, no PCI */
    CFE_INIT_PCI,				/* 2 : UART console, PCI */
    CFE_INIT_PCI | SWARM_PROMICE_CONSOLE,	/* 3 : PromICE console, PCI */
    0,						/* 4 : unused  */
    0,						/* 5 : unused */
    CFE_INIT_PCI | CFE_LDT_SLAVE,		/* 6 : 2, plus LDT slave mode */
    CFE_INIT_SAFE,				/* 7 : UART console, no pci, safe mode */
    0,						/* 8 : unused */
    0,						/* 9 : unused */
    CFE_INIT_PCI | SWARM_VGA_CONSOLE,		/* 10 : PCI, VGA Console */
    0,						/* 11 : unused */
    0,						/* 12 : unused */
    0,						/* 13 : unused */
    0,						/* 14 : unused */
    0						/* 15 : unused */
};


unsigned int cpu_revision;


/*  *********************************************************************
    *  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);

    cpu_revision = (unsigned int) (SBREADCSR(A_SCD_SYSTEM_REVISION) & 
				   (M_SYS_PART | M_SYS_REVISION));

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

#if CFG_VGACONSOLE
    /* VGA console, for the truly adventurous! */
    cfe_add_device(&pcconsole2,0,0,0);
#endif

    /*
     * Read the config switch and decide how we are going to set up
     * the console.  This is actually board revision dependent.
     *
     * Note that the human-readable board revision is (swarm_board_rev+1).
     */
    swarm_board_rev = G_SYS_CONFIG(syscfg) & 0x3;
    switch (swarm_board_rev) {
    case 0:
	/*
	 * Board revision 0.  The config switch sets bits 3..5 of the
	 * SYS_CONFIG field of the syscfg register.
	 */
        swarm_config_switch = (G_SYS_CONFIG(syscfg) >> 3) & 0x07;
	break;

    default:
	/*
	 * In later board revisions, the config switch sets bits 2..5.
	 */
        swarm_config_switch = (G_SYS_CONFIG(syscfg) >> 2) & 0x0f;
	break;
    }

    cfe_startflags = swarm_startflags[swarm_config_switch];

    /*
     * Choose which console we're going to use.  Our three choices
     * are the PromICE AI2 port, the "VGA" console, and
     * the UART.
     *
     * The UART is the "normal" console, of course.
     */

    if (cfe_startflags & SWARM_PROMICE_CONSOLE) {
	cfe_set_console("promice0");
	}
#if CFG_VGACONSOLE 
    /*
     * If VGA console, "buffer" the console messages until the
     * PCI is ready.
     */
    else if (cfe_startflags & SWARM_VGA_CONSOLE) {
	cfe_set_console(CFE_BUFFER_CONSOLE);
	}
#endif
    else {
	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 - These depend on the SWARM
     * board version since SWARM rev3 (and later) do not have Xicor
     * clock chips.  Instead, a second 24lc128 is on SMBus 1.
     */

    switch (swarm_board_rev) {
	case SWARM_REV_1:
	case SWARM_REV_2:
	    cfe_add_device(&smbus_x1240eeprom,X1240_SMBUS_CHAN,X1240_SMBUS_DEV,0);
	    break;
	default:
	case SWARM_REV_3:
	    cfe_add_device(&smbus_24lc128,BIGEEPROM_SMBUS_CHAN_1,BIGEEPROM_SMBUS_DEV_1,0);
	    
	}

    cfe_set_envdevice("eeprom0");	/* Connect NVRAM subsystem to EEPROM */
}


/*  *********************************************************************
    *  board_smbus_waitready(chan)
    *  
    *  Wait until the SMBus channel is ready.  We simply poll
    *  the busy bit until it clears.
    *  
    *  Input parameters: 
    *  	   chan - channel (0 or 1)
    *
    *  Return value:
    *      nothing
    ********************************************************************* */
static int board_smbus_waitready(int chan)
{
    uintptr_t reg;
    uint64_t status;

    reg = PHYS_TO_K1(A_SMB_REGISTER(chan,R_SMB_STATUS));

    for (;;) {
	status = SBREADCSR(reg);
	if (status & M_SMB_BUSY) continue;
	break;
	}

    if (status & M_SMB_ERROR) {
	
	SBWRITECSR(reg,(status & M_SMB_ERROR));
	return -1;
	}
    return 0;
}

/*  *********************************************************************
    *  board_probe_x1241(chan,dev)
    *  
    *  Probe for a Xicor X1241 at the specified device and channel.
    *  
    *  Actually, we just probe for anything at this address, and
    *  assume it's a Xicor.
    *  
    *  Input parameters: 
    *  	   chan - SMBus channel
    *  	   dev - device ID
    *