Add qemu 2.4.0

Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5
Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>

1 files changed, 670 insertions, 0 deletions

diff --git a/qemu/roms/u-boot/common/cmd_scsi.c b/qemu/roms/u-boot/common/cmd_scsi.c
new file mode 100644
index 000000000..b3f7687ae
--- /dev/null
+++ b/qemu/roms/u-boot/common/cmd_scsi.c
@@ -0,0 +1,670 @@
+/*
+ * (C) Copyright 2001
+ * Denis Peter, MPL AG Switzerland
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+/*
+ * SCSI support.
+ */
+#include <common.h>
+#include <command.h>
+#include <asm/processor.h>
+#include <scsi.h>
+#include <image.h>
+#include <pci.h>
+
+#ifdef CONFIG_SCSI_DEV_LIST
+#define SCSI_DEV_LIST CONFIG_SCSI_DEV_LIST
+#else
+#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
+#elif defined CONFIG_SATA_ULI5288
+
+#define SCSI_VEND_ID 0x10b9
+#define SCSI_DEV_ID  0x5288
+
+#elif !defined(CONFIG_SCSI_AHCI_PLAT)
+#error no scsi device defined
+#endif
+#define SCSI_DEV_LIST {SCSI_VEND_ID, SCSI_DEV_ID}
+#endif
+
+#ifdef CONFIG_PCI
+const struct pci_device_id scsi_device_list[] = { SCSI_DEV_LIST };
+#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[CONFIG_SYS_SCSI_MAX_DEVICE];
+
+/********************************************************************************
+ *  forward declerations of some Setup Routines
+ */
+void scsi_setup_test_unit_ready(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);
+static void scsi_setup_write_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);
+
+
+static int scsi_read_capacity(ccb *pccb, lbaint_t *capacity,
+			      unsigned long *blksz);
+static ulong scsi_read(int device, lbaint_t blknr, lbaint_t blkcnt,
+		       void *buffer);
+static ulong scsi_write(int device, lbaint_t blknr,
+			lbaint_t blkcnt, const void *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;
+	lbaint_t capacity;
+	unsigned long blksz;
+	ccb* pccb=(ccb *)&tempccb;
+
+	if(mode==1) {
+		printf("scanning bus for devices...\n");
+	}
+	for(i=0;i<CONFIG_SYS_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].log2blksz =
+			LOG2_INVALID(typeof(scsi_dev_desc[i].log2blksz));
+		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_dev_desc[i].block_write = scsi_write;
+	}
+	scsi_max_devs=0;
+	for(i=0;i<CONFIG_SYS_SCSI_MAX_SCSI_ID;i++) {
+		pccb->target=i;
+		for(lun=0;lun<CONFIG_SYS_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) {
+					debug ("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((unsigned char *)&scsi_dev_desc[scsi_max_devs].vendor[0],
+				       &tempbuff[8], 8);
+			scsi_ident_cpy((unsigned char *)&scsi_dev_desc[scsi_max_devs].product[0],
+				       &tempbuff[16], 16);
+			scsi_ident_cpy((unsigned char *)&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;
+			}
+			if (scsi_read_capacity(pccb, &capacity, &blksz)) {
+				scsi_print_error(pccb);
+				continue;
+			}
+			scsi_dev_desc[scsi_max_devs].lba=capacity;
+			scsi_dev_desc[scsi_max_devs].blksz=blksz;
+			scsi_dev_desc[scsi_max_devs].log2blksz =
+				LOG2(scsi_dev_desc[scsi_max_devs].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;
+
+	printf("Found %d device(s).\n", scsi_max_devs);
+#ifndef CONFIG_SPL_BUILD
+	setenv_ulong("scsidevs", scsi_max_devs);
+#endif
+}
+
+int scsi_get_disk_count(void)
+{
+	return scsi_max_devs;
+}
+
+#ifdef CONFIG_PCI
+void scsi_init(void)
+{
+	int busdevfunc;
+	int i;
+	/*
+	 * Find a device from the list, this driver will support a single
+	 * controller.
+	 */
+	for (i = 0; i < ARRAY_SIZE(scsi_device_list); i++) {
+		/* get PCI Device ID */
+		busdevfunc = pci_find_device(scsi_device_list[i].vendor,
+					     scsi_device_list[i].device,
+					     0);
+		if (busdevfunc != -1)
+			break;
+	}
+
+	if (busdevfunc == -1) {
+		printf("Error: SCSI Controller(s) ");
+		for (i = 0; i < ARRAY_SIZE(scsi_device_list); i++) {
+			printf("%04X:%04X ",
+			       scsi_device_list[i].vendor,
+			       scsi_device_list[i].device);
+		}
+		printf("not found\n");
+		return;
+	}
+#ifdef DEBUG
+	else {
+		printf("SCSI Controller (%04X,%04X) found (%d:%d:%d)\n",
+		       scsi_device_list[i].vendor,
+		       scsi_device_list[i].device,
+		       (busdevfunc >> 16) & 0xFF,
+		       (busdevfunc >> 11) & 0x1F,
+		       (busdevfunc >> 8) & 0x7);
+	}
+#endif
+	scsi_low_level_init(busdevfunc);
+	scsi_scan(1);
+}
+#endif
+
+#ifdef CONFIG_PARTITIONS
+block_dev_desc_t * scsi_get_dev(int dev)
+{
+	return (dev < CONFIG_SYS_SCSI_MAX_DEVICE) ? &scsi_dev_desc[dev] : NULL;
+}
+#endif
+
+/******************************************************************************
+ * scsi boot command intepreter. Derived from diskboot
+ */
+int do_scsiboot (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+	return common_diskboot(cmdtp, "scsi", argc, argv);
+}
+
+/*********************************************************************************
+ * scsi command intepreter
+ */
+int do_scsi (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+	switch (argc) {
+	case 0:
+	case 1:
+		return CMD_RET_USAGE;
+
+	case 2:
+			if (strncmp(argv[1],"res",3) == 0) {
+				printf("\nReset SCSI\n");
+				scsi_bus_reset();
+				scsi_scan(1);
+				return 0;
+			}
+			if (strncmp(argv[1],"inf",3) == 0) {
+				int i;
+				for (i=0; i<CONFIG_SYS_SCSI_MAX_DEVICE; ++i) {
+					if(scsi_dev_desc[i].type==DEV_TYPE_UNKNOWN)
+						continue; /* list only known devices */
+					printf ("SCSI dev. %d:  ", i);
+					dev_print(&scsi_dev_desc[i]);
+				}
+				return 0;
+			}
+			if (strncmp(argv[1],"dev",3) == 0) {
+				if ((scsi_curr_dev < 0) || (scsi_curr_dev >= CONFIG_SYS_SCSI_MAX_DEVICE)) {
+					printf("\nno SCSI devices available\n");
+					return 1;
+				}
+				printf ("\n    Device %d: ", scsi_curr_dev);
+				dev_print(&scsi_dev_desc[scsi_curr_dev]);
+				return 0;
+			}
+			if (strncmp(argv[1],"scan",4) == 0) {
+				scsi_scan(1);
+				return 0;
+			}
+			if (strncmp(argv[1],"part",4) == 0) {
+				int dev, ok;
+				for (ok=0, dev=0; dev<CONFIG_SYS_SCSI_MAX_DEVICE; ++dev) {
+					if (scsi_dev_desc[dev].type!=DEV_TYPE_UNKNOWN) {
+						ok++;
+						if (dev)
+							printf("\n");
+						debug ("print_part of %x\n",dev);
+							print_part(&scsi_dev_desc[dev]);
+					}
+				}
+				if (!ok)
+					printf("\nno SCSI devices available\n");
+				return 1;
+			}
+			return CMD_RET_USAGE;
+	case 3:
+			if (strncmp(argv[1],"dev",3) == 0) {
+				int dev = (int)simple_strtoul(argv[2], NULL, 10);
+				printf ("\nSCSI device %d: ", dev);
+				if (dev >= CONFIG_SYS_SCSI_MAX_DEVICE) {
+					printf("unknown device\n");
+					return 1;
+				}
+				printf ("\n    Device %d: ", dev);
+				dev_print(&scsi_dev_desc[dev]);
+				if(scsi_dev_desc[dev].type == DEV_TYPE_UNKNOWN) {
+					return 1;
+				}
+				scsi_curr_dev = dev;
+				printf("... is now current device\n");
+				return 0;
+			}
+			if (strncmp(argv[1],"part",4) == 0) {
+				int dev = (int)simple_strtoul(argv[2], NULL, 10);
+				if(scsi_dev_desc[dev].type != DEV_TYPE_UNKNOWN) {
+					print_part(&scsi_dev_desc[dev]);
+				}
+				else {
+					printf ("\nSCSI device %d not available\n", dev);
+				}
+				return 1;
+			}
+			return CMD_RET_USAGE;
+    default:
+			/* at least 4 args */
+			if (strcmp(argv[1],"read") == 0) {
+				ulong addr = simple_strtoul(argv[2], NULL, 16);
+				ulong blk  = simple_strtoul(argv[3], NULL, 16);
+				ulong cnt  = simple_strtoul(argv[4], NULL, 16);
+				ulong n;
+				printf ("\nSCSI read: device %d block # %ld, count %ld ... ",
+						scsi_curr_dev, blk, cnt);
+				n = scsi_read(scsi_curr_dev, blk, cnt, (ulong *)addr);
+				printf ("%ld blocks read: %s\n",n,(n==cnt) ? "OK" : "ERROR");
+				return 0;
+			} else if (strcmp(argv[1], "write") == 0) {
+				ulong addr = simple_strtoul(argv[2], NULL, 16);
+				ulong blk = simple_strtoul(argv[3], NULL, 16);
+				ulong cnt = simple_strtoul(argv[4], NULL, 16);
+				ulong n;
+				printf("\nSCSI write: device %d block # %ld, "
+				       "count %ld ... ",
+				       scsi_curr_dev, blk, cnt);
+				n = scsi_write(scsi_curr_dev, blk, cnt,
+					       (ulong *)addr);
+				printf("%ld blocks written: %s\n", n,
+				       (n == cnt) ? "OK" : "ERROR");
+				return 0;
+			}
+	} /* switch */
+	return CMD_RET_USAGE;
+}
+
+/****************************************************************************************
+ * scsi_read
+ */
+
+#define SCSI_MAX_READ_BLK 0xFFFF /* almost the maximum amount of the scsi_ext command.. */
+
+static ulong scsi_read(int device, lbaint_t blknr, lbaint_t blkcnt,
+		       void *buffer)
+{
+	lbaint_t start, blks;
+	uintptr_t buf_addr;
+	unsigned short smallblks;
+	ccb* pccb=(ccb *)&tempccb;
+	device&=0xff;
+	/* Setup  device
+	 */
+	pccb->target=scsi_dev_desc[device].target;
+	pccb->lun=scsi_dev_desc[device].lun;
+	buf_addr=(unsigned long)buffer;
+	start=blknr;
+	blks=blkcnt;
+	debug("\nscsi_read: dev %d startblk " LBAF
+	      ", blccnt " LBAF " buffer %lx\n",
+	      device, start, blks, (unsigned long)buffer);
+	do {
+		pccb->pdata=(unsigned char *)buf_addr;
+		if(blks>SCSI_MAX_READ_BLK) {
+			pccb->datalen=scsi_dev_desc[device].blksz * SCSI_MAX_READ_BLK;
+			smallblks=SCSI_MAX_READ_BLK;
+			scsi_setup_read_ext(pccb,start,smallblks);
+			start+=SCSI_MAX_READ_BLK;
+			blks-=SCSI_MAX_READ_BLK;
+		}
+		else {
+			pccb->datalen=scsi_dev_desc[device].blksz * blks;
+			smallblks=(unsigned short) blks;
+			scsi_setup_read_ext(pccb,start,smallblks);
+			start+=blks;
+			blks=0;
+		}
+		debug("scsi_read_ext: startblk " LBAF
+		      ", blccnt %x buffer %lx\n",
+		      start, smallblks, buf_addr);
+		if (scsi_exec(pccb) != true) {
+			scsi_print_error(pccb);
+			blkcnt-=blks;
+			break;
+		}
+		buf_addr+=pccb->datalen;
+	} while(blks!=0);
+	debug("scsi_read_ext: end startblk " LBAF
+	      ", blccnt %x buffer %lx\n", start, smallblks, buf_addr);
+	return(blkcnt);
+}
+
+/*******************************************************************************
+ * scsi_write
+ */
+
+/* Almost the maximum amount of the scsi_ext command.. */
+#define SCSI_MAX_WRITE_BLK 0xFFFF
+
+static ulong scsi_write(int device, lbaint_t blknr,
+			lbaint_t blkcnt, const void *buffer)
+{
+	lbaint_t start, blks;
+	uintptr_t buf_addr;
+	unsigned short smallblks;
+	ccb* pccb = (ccb *)&tempccb;
+	device &= 0xff;
+	/* Setup  device
+	 */
+	pccb->target = scsi_dev_desc[device].target;
+	pccb->lun = scsi_dev_desc[device].lun;
+	buf_addr = (unsigned long)buffer;
+	start = blknr;
+	blks = blkcnt;
+	debug("\n%s: dev %d startblk " LBAF ", blccnt " LBAF " buffer %lx\n",
+	      __func__, device, start, blks, (unsigned long)buffer);
+	do {
+		pccb->pdata = (unsigned char *)buf_addr;
+		if (blks > SCSI_MAX_WRITE_BLK) {
+			pccb->datalen = (scsi_dev_desc[device].blksz *
+					 SCSI_MAX_WRITE_BLK);
+			smallblks = SCSI_MAX_WRITE_BLK;
+			scsi_setup_write_ext(pccb, start, smallblks);
+			start += SCSI_MAX_WRITE_BLK;
+			blks -= SCSI_MAX_WRITE_BLK;
+		} else {
+			pccb->datalen = scsi_dev_desc[device].blksz * blks;
+			smallblks = (unsigned short)blks;
+			scsi_setup_write_ext(pccb, start, smallblks);
+			start += blks;
+			blks = 0;
+		}
+		debug("%s: startblk " LBAF ", blccnt %x buffer %lx\n",
+		      __func__, start, smallblks, buf_addr);
+		if (scsi_exec(pccb) != true) {
+			scsi_print_error(pccb);
+			blkcnt -= blks;
+			break;
+		}
+		buf_addr += pccb->datalen;
+	} while (blks != 0);
+	debug("%s: end startblk " LBAF ", blccnt %x buffer %lx\n",
+	      __func__, start, smallblks, buf_addr);
+	return blkcnt;
+}
+
+/* copy src to dest, skipping leading and trailing blanks
+ * and null terminate the string
+ */
+void scsi_ident_cpy (unsigned char *dest, unsigned char *src, unsigned int len)
+{
+	int start,end;
+
+	start=0;
+	while(start<len) {
+		if(src[start]!=' ')
+			break;
+		start++;
+	}
+	end=len-1;
+	while(end>start) {
+		if(src[end]!=' ')
+			break;
+		end--;
+	}
+	for( ; start<=end; start++) {
+		*dest++=src[start];
+	}
+	*dest='\0';
+}
+
+
+/* Trim trailing blanks, and NUL-terminate string
+ */
+void scsi_trim_trail (unsigned char *str, unsigned int len)
+{
+	unsigned char *p = str + len - 1;
+
+	while (len-- > 0) {
+		*p-- = '\0';
+		if (*p != ' ') {
+			return;
+		}
+	}
+}
+
+int scsi_read_capacity(ccb *pccb, lbaint_t *capacity, unsigned long *blksz)
+{
+	*capacity = 0;
+
+	memset(pccb->cmd, 0, sizeof(pccb->cmd));
+	pccb->cmd[0] = SCSI_RD_CAPAC10;
+	pccb->cmd[1] = pccb->lun << 5;
+	pccb->cmdlen = 10;
+	pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
+
+	pccb->datalen = 8;
+	if (scsi_exec(pccb) != true)
+		return 1;
+
+	*capacity = ((lbaint_t)pccb->pdata[0] << 24) |
+		    ((lbaint_t)pccb->pdata[1] << 16) |
+		    ((lbaint_t)pccb->pdata[2] << 8)  |
+		    ((lbaint_t)pccb->pdata[3]);
+
+	if (*capacity != 0xffffffff) {
+		/* Read capacity (10) was sufficient for this drive. */
+		*blksz = ((unsigned long)pccb->pdata[4] << 24) |
+			 ((unsigned long)pccb->pdata[5] << 16) |
+			 ((unsigned long)pccb->pdata[6] << 8)  |
+			 ((unsigned long)pccb->pdata[7]);
+		return 0;
+	}
+
+	/* Read capacity (10) was insufficient. Use read capacity (16). */
+
+	memset(pccb->cmd, 0, sizeof(pccb->cmd));
+	pccb->cmd[0] = SCSI_RD_CAPAC16;
+	pccb->cmd[1] = 0x10;
+	pccb->cmdlen = 16;
+	pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
+
+	pccb->datalen = 16;
+	if (scsi_exec(pccb) != true)
+		return 1;
+
+	*capacity = ((uint64_t)pccb->pdata[0] << 56) |
+		    ((uint64_t)pccb->pdata[1] << 48) |
+		    ((uint64_t)pccb->pdata[2] << 40) |
+		    ((uint64_t)pccb->pdata[3] << 32) |
+		    ((uint64_t)pccb->pdata[4] << 24) |
+		    ((uint64_t)pccb->pdata[5] << 16) |
+		    ((uint64_t)pccb->pdata[6] << 8)  |
+		    ((uint64_t)pccb->pdata[7]);
+
+	*blksz = ((uint64_t)pccb->pdata[8]  << 56) |
+		 ((uint64_t)pccb->pdata[9]  << 48) |
+		 ((uint64_t)pccb->pdata[10] << 40) |
+		 ((uint64_t)pccb->pdata[11] << 32) |
+		 ((uint64_t)pccb->pdata[12] << 24) |
+		 ((uint64_t)pccb->pdata[13] << 16) |
+		 ((uint64_t)pccb->pdata[14] << 8)  |
+		 ((uint64_t)pccb->pdata[15]);
+
+	return 0;
+}
+
+
+/************************************************************************************
+ * Some setup (fill-in) routines
+ */
+void scsi_setup_test_unit_ready(ccb * pccb)
+{
+	pccb->cmd[0]=SCSI_TST_U_RDY;
+	pccb->cmd[1]=pccb->lun<<5;
+	pccb->cmd[2]=0;
+	pccb->cmd[3]=0;
+	pccb->cmd[4]=0;
+	pccb->cmd[5]=0;
+	pccb->cmdlen=6;
+	pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */
+}
+
+void scsi_setup_read_ext(ccb * pccb, unsigned long start, unsigned short blocks)
+{
+	pccb->cmd[0]=SCSI_READ10;
+	pccb->cmd[1]=pccb->lun<<5;
+	pccb->cmd[2]=((unsigned char) (start>>24))&0xff;
+	pccb->cmd[3]=((unsigned char) (start>>16))&0xff;
+	pccb->cmd[4]=((unsigned char) (start>>8))&0xff;
+	pccb->cmd[5]=((unsigned char) (start))&0xff;
+	pccb->cmd[6]=0;
+	pccb->cmd[7]=((unsigned char) (blocks>>8))&0xff;
+	pccb->cmd[8]=(unsigned char) blocks & 0xff;
+	pccb->cmd[6]=0;
+	pccb->cmdlen=10;
+	pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */
+	debug ("scsi_setup_read_ext: cmd: %02X %02X startblk %02X%02X%02X%02X blccnt %02X%02X\n",
+		pccb->cmd[0],pccb->cmd[1],
+		pccb->cmd[2],pccb->cmd[3],pccb->cmd[4],pccb->cmd[5],
+		pccb->cmd[7],pccb->cmd[8]);
+}
+
+void scsi_setup_write_ext(ccb *pccb, unsigned long start, unsigned short blocks)
+{
+	pccb->cmd[0] = SCSI_WRITE10;
+	pccb->cmd[1] = pccb->lun << 5;
+	pccb->cmd[2] = ((unsigned char) (start>>24)) & 0xff;
+	pccb->cmd[3] = ((unsigned char) (start>>16)) & 0xff;
+	pccb->cmd[4] = ((unsigned char) (start>>8)) & 0xff;
+	pccb->cmd[5] = ((unsigned char) (start)) & 0xff;
+	pccb->cmd[6] = 0;
+	pccb->cmd[7] = ((unsigned char) (blocks>>8)) & 0xff;
+	pccb->cmd[8] = (unsigned char)blocks & 0xff;
+	pccb->cmd[9] = 0;
+	pccb->cmdlen = 10;
+	pccb->msgout[0] = SCSI_IDENTIFY;  /* NOT USED */
+	debug("%s: cmd: %02X %02X startblk %02X%02X%02X%02X blccnt %02X%02X\n",
+	      __func__,
+	      pccb->cmd[0], pccb->cmd[1],
+	      pccb->cmd[2], pccb->cmd[3], pccb->cmd[4], pccb->cmd[5],
+	      pccb->cmd[7], pccb->cmd[8]);
+}
+
+void scsi_setup_read6(ccb * pccb, unsigned long start, unsigned short blocks)
+{
+	pccb->cmd[0]=SCSI_READ6;
+	pccb->cmd[1]=pccb->lun<<5 | (((unsigned char)(start>>16))&0x1f);
+	pccb->cmd[2]=((unsigned char) (start>>8))&0xff;
+	pccb->cmd[3]=((unsigned char) (start))&0xff;
+	pccb->cmd[4]=(unsigned char) blocks & 0xff;
+	pccb->cmd[5]=0;
+	pccb->cmdlen=6;
+	pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */
+	debug ("scsi_setup_read6: cmd: %02X %02X startblk %02X%02X blccnt %02X\n",
+		pccb->cmd[0],pccb->cmd[1],
+		pccb->cmd[2],pccb->cmd[3],pccb->cmd[4]);
+}
+
+
+void scsi_setup_inquiry(ccb * pccb)
+{
+	pccb->cmd[0]=SCSI_INQUIRY;
+	pccb->cmd[1]=pccb->lun<<5;
+	pccb->cmd[2]=0;
+	pccb->cmd[3]=0;
+	if(pccb->datalen>255)
+		pccb->cmd[4]=255;
+	else
+		pccb->cmd[4]=(unsigned char)pccb->datalen;
+	pccb->cmd[5]=0;
+	pccb->cmdlen=6;
+	pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */
+}
+
+
+U_BOOT_CMD(
+	scsi, 5, 1, do_scsi,
+	"SCSI sub-system",
+	"reset - reset SCSI controller\n"
+	"scsi info  - show available SCSI devices\n"
+	"scsi scan  - (re-)scan SCSI bus\n"
+	"scsi device [dev] - show or set current device\n"
+	"scsi part [dev] - print partition table of one or all SCSI devices\n"
+	"scsi read addr blk# cnt - read `cnt' blocks starting at block `blk#'\n"
+	"     to memory address `addr'\n"
+	"scsi write addr blk# cnt - write `cnt' blocks starting at block\n"
+	"     `blk#' from memory address `addr'"
+);
+
+U_BOOT_CMD(
+	scsiboot, 3, 1, do_scsiboot,
+	"boot from SCSI device",
+	"loadAddr dev:part"
+);