cmd_scsi.c

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/*
 * (C) Copyright 2001
 * Denis Peter, MPL AG Switzerland
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * 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
 *
 *
 *
 */

/*
 * SCSI support.
 */

#include <common.h>
#include <command.h>
#include <asm/processor.h>
#include <scsi.h>
#include <image.h>
#include <pci.h>


#undef	SCSI_DEBUG

#ifdef	SCSI_DEBUG
#define	PRINTF(fmt,args...)	printf (fmt ,##args)
#else
#define PRINTF(fmt,args...)
#endif

#if (CONFIG_COMMANDS & CFG_CMD_SCSI)

#ifdef CONFIG_SCSI_SYM53C8XX
#define SCSI_VEND_ID	0x1000
#ifndef CONFIG_SCSI_DEV_ID
#define SCSI_DEV_ID		0x0001
#else
#define SCSI_DEV_ID		CONFIG_SCSI_DEV_ID
#endif
#else
#error CONFIG_SCSI_SYM53C8XX must be defined
#endif


static ccb tempccb;	/* temporary scsi command buffer */

static unsigned char tempbuff[512]; /* temporary data buffer */

static int scsi_max_devs; /* number of highest available scsi device */

static int scsi_curr_dev; /* current device */

static block_dev_desc_t scsi_dev_desc[CFG_SCSI_MAX_DEVICE];

/********************************************************************************
 *  forward declerations of some Setup Routines
 */
void scsi_setup_test_unit_ready(ccb * pccb);
void scsi_setup_read_capacity(ccb * pccb);
void scsi_setup_read6(ccb * pccb, unsigned long start, unsigned short blocks);
void scsi_setup_read_ext(ccb * pccb, unsigned long start, unsigned short blocks);
void scsi_setup_inquiry(ccb * pccb);
void scsi_ident_cpy (unsigned char *dest, unsigned char *src, unsigned int len);


ulong scsi_read(int device, ulong blknr, ulong blkcnt, ulong *buffer);


/*********************************************************************************
 * (re)-scan the scsi bus and reports scsi device info
 * to the user if mode = 1
 */
void scsi_scan(int mode)
{
	unsigned char i,perq,modi,lun;
	unsigned long capacity,blksz;
	ccb* pccb=(ccb *)&tempccb;

	if(mode==1) {
		printf("scanning bus for devices...\n");
	}
	for(i=0;i<CFG_SCSI_MAX_DEVICE;i++) {
		scsi_dev_desc[i].target=0xff;
		scsi_dev_desc[i].lun=0xff;
		scsi_dev_desc[i].lba=0;
		scsi_dev_desc[i].blksz=0;
		scsi_dev_desc[i].type=DEV_TYPE_UNKNOWN;
		scsi_dev_desc[i].vendor[0]=0;
		scsi_dev_desc[i].product[0]=0;
		scsi_dev_desc[i].revision[0]=0;
		scsi_dev_desc[i].removable=FALSE;
		scsi_dev_desc[i].if_type=IF_TYPE_SCSI;
		scsi_dev_desc[i].dev=i;
		scsi_dev_desc[i].part_type=PART_TYPE_UNKNOWN;
		scsi_dev_desc[i].block_read=scsi_read;
	}
	scsi_max_devs=0;
	for(i=0;i<CFG_SCSI_MAX_SCSI_ID;i++) {
		pccb->target=i;
		for(lun=0;lun<CFG_SCSI_MAX_LUN;lun++) {
			pccb->lun=lun;
			pccb->pdata=(unsigned char *)&tempbuff;
			pccb->datalen=512;
			scsi_setup_inquiry(pccb);
			if(scsi_exec(pccb)!=TRUE) {
				if(pccb->contr_stat==SCSI_SEL_TIME_OUT) {
					PRINTF("Selection timeout ID %d\n",pccb->target);
					continue; /* selection timeout => assuming no device present */
				}
				scsi_print_error(pccb);
				continue;
			}
			perq=tempbuff[0];
			modi=tempbuff[1];
			if((perq & 0x1f)==0x1f) {
				continue; /* skip unknown devices */
			}
			if((modi&0x80)==0x80) /* drive is removable */
				scsi_dev_desc[scsi_max_devs].removable=TRUE;
			/* get info for this device */
			scsi_ident_cpy(&scsi_dev_desc[scsi_max_devs].vendor[0],&tempbuff[8],8);
			scsi_ident_cpy(&scsi_dev_desc[scsi_max_devs].product[0],&tempbuff[16],16);
			scsi_ident_cpy(&scsi_dev_desc[scsi_max_devs].revision[0],&tempbuff[32],4);
			scsi_dev_desc[scsi_max_devs].target=pccb->target;
			scsi_dev_desc[scsi_max_devs].lun=pccb->lun;

			pccb->datalen=0;
			scsi_setup_test_unit_ready(pccb);
			if(scsi_exec(pccb)!=TRUE) {
				if(scsi_dev_desc[scsi_max_devs].removable==TRUE) {
					scsi_dev_desc[scsi_max_devs].type=perq;
					goto removable;
				}
				scsi_print_error(pccb);
				continue;
			}
			pccb->datalen=8;
			scsi_setup_read_capacity(pccb);
			if(scsi_exec(pccb)!=TRUE) {
				scsi_print_error(pccb);
				continue;
			}
			capacity=((unsigned long)tempbuff[0]<<24)|((unsigned long)tempbuff[1]<<16)|
					((unsigned long)tempbuff[2]<<8)|((unsigned long)tempbuff[3]);
			blksz=((unsigned long)tempbuff[4]<<24)|((unsigned long)tempbuff[5]<<16)|
				((unsigned long)tempbuff[6]<<8)|((unsigned long)tempbuff[7]);
			scsi_dev_desc[scsi_max_devs].lba=capacity;
			scsi_dev_desc[scsi_max_devs].blksz=blksz;
			scsi_dev_desc[scsi_max_devs].type=perq;
			init_part(&scsi_dev_desc[scsi_max_devs]);
removable:
			if(mode==1) {
				printf ("  Device %d: ", scsi_max_devs);
				dev_print(&scsi_dev_desc[scsi_max_devs]);
			} /* if mode */
			scsi_max_devs++;
		} /* next LUN */
	}
	if(scsi_max_devs>0)
		scsi_curr_dev=0;
	else
		scsi_curr_dev=-1;
}


void scsi_init(void)
{
	int busdevfunc;

	busdevfunc=pci_find_device(SCSI_VEND_ID,SCSI_DEV_ID,0); /* get PCI Device ID */
	if(busdevfunc==-1) {
		printf("Error SCSI Controller (%04X,%04X) not found\n",SCSI_VEND_ID,SCSI_DEV_ID);
		return;
	}
#ifdef DEBUG
	else {
		printf("SCSI Controller (%04X,%04X) found (%d:%d:%d)\n",SCSI_VEND_ID,SCSI_DEV_ID,(busdevfunc>>16)&0xFF,(busdevfunc>>11)&0x1F,(busdevfunc>>8)&0x7);
	}
#endif
	scsi_low_level_init(busdevfunc);
	scsi_scan(1);
}

block_dev_desc_t * scsi_get_dev(int dev)
{
	return((block_dev_desc_t *)&scsi_dev_desc[dev]);
}


/******************************************************************************
 * scsi boot command intepreter. Derived from diskboot
 */
int do_scsiboot (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
	char *boot_device = NULL;
	char *ep;
	int dev, part = 0;
	ulong cnt;
	ulong addr;
	disk_partition_t info;
	image_header_t *hdr;
	int rcode = 0;

	switch (argc) {
	case 1:
		addr = CFG_LOAD_ADDR;
		boot_device = getenv ("bootdevice");
		break;
	case 2:
		addr = simple_strtoul(argv[1], NULL, 16);
		boot_device = getenv ("bootdevice");
		break;
	case 3:
		addr = simple_strtoul(argv[1], NULL, 16);
		boot_device = argv[2];
		break;
	default:
		printf ("Usage:\n%s\n", cmdtp->usage);
		return 1;
	}

	if (!boot_device) {
		puts ("\n** No boot device **\n");
		return 1;
	}

	dev = simple_strtoul(boot_device, &ep, 16);
	printf("booting from dev %d\n",dev);
	if (scsi_dev_desc[dev].type == DEV_TYPE_UNKNOWN) {
		printf ("\n** Device %d not available\n", dev);
		return 1;
	}

	if (*ep) {
		if (*ep != ':') {
			puts ("\n** Invalid boot device, use `dev[:part]' **\n");
			return 1;
		}
		part = simple_strtoul(++ep, NULL, 16);
	}
	if (get_partition_info (&scsi_dev_desc[dev], part, &info)) {
		printf("error reading partinfo\n");
		return 1;
	}
	if ((strncmp(info.type, BOOT_PART_TYPE, sizeof(info.type)) != 0) &&
	    (strncmp(info.type, BOOT_PART_COMP, sizeof(info.type)) != 0)) {
		printf ("\n** Invalid partition type \"%.32s\""
			" (expect \"" BOOT_PART_TYPE "\")\n",
			info.type);
		return 1;
	}

	printf ("\nLoading from SCSI device %d, partition %d: "
		"Name: %.32s  Type: %.32s\n",
		dev, part, info.name, info.type);

	PRINTF ("First Block: %ld,  # of blocks: %ld, Block Size: %ld\n",
		info.start, info.size, info.blksz);

	if (scsi_read (dev, info.start, 1, (ulong *)addr) != 1) {
		printf ("** Read error on %d:%d\n", dev, part);
		return 1;
	}

	hdr = (image_header_t *)addr;

	if (hdr->ih_magic == IH_MAGIC) {

		print_image_hdr (hdr);
		cnt = (hdr->ih_size + sizeof(image_header_t));
		cnt += info.blksz - 1;
		cnt /= info.blksz;
		cnt -= 1;
	} else {
		printf("\n** Bad Magic Number **\n");
		return 1;
	}

	if (scsi_read (dev, info.start+1, cnt,
		      (ulong *)(addr+info.blksz)) != cnt) {