From: Simon Glass <sjg@chromium.org>
Date: Sun, 1 May 2016 17:35:57 +0000 (-0600)
Subject: dm: scsi: Remove the forward declarations
X-Git-Url: http://git.dujemihanovic.xyz/?a=commitdiff_plain;h=73a9cfde783421aa7355143bc5b535ae81126d2c;p=u-boot.git

dm: scsi: Remove the forward declarations

Reorder the code to avoid needing forward declarations.

Signed-off-by: Simon Glass <sjg@chromium.org>
---

diff --git a/cmd/scsi.c b/cmd/scsi.c
index 8991125c66..9ba070f8b9 100644
--- a/cmd/scsi.c
+++ b/cmd/scsi.c
@@ -50,130 +50,230 @@ static int scsi_curr_dev; /* current device */
 
 static struct blk_desc scsi_dev_desc[CONFIG_SYS_SCSI_MAX_DEVICE];
 
-/********************************************************************************
- *  forward declerations of some Setup Routines
+/****************************************************************************************
+ * scsi_read
  */
-void scsi_setup_test_unit_ready(ccb * pccb);
-void scsi_setup_read6(ccb * pccb, lbaint_t start, unsigned short blocks);
-void scsi_setup_read_ext(ccb * pccb, lbaint_t start, unsigned short blocks);
-void scsi_setup_read16(ccb * pccb, lbaint_t start, unsigned long blocks);
 
-static void scsi_setup_write_ext(ccb *pccb, lbaint_t start,
-				unsigned short blocks);
-void scsi_setup_inquiry(ccb * pccb);
-void scsi_ident_cpy (unsigned char *dest, unsigned char *src, unsigned int len);
+/* almost the maximum amount of the scsi_ext command.. */
+#define SCSI_MAX_READ_BLK 0xFFFF
+#define SCSI_LBA48_READ	0xFFFFFFF
 
+#ifdef CONFIG_SYS_64BIT_LBA
+void scsi_setup_read16(ccb * pccb, lbaint_t start, unsigned long blocks)
+{
+	pccb->cmd[0] = SCSI_READ16;
+	pccb->cmd[1] = pccb->lun<<5;
+	pccb->cmd[2] = ((unsigned char) (start >> 56)) & 0xff;
+	pccb->cmd[3] = ((unsigned char) (start >> 48)) & 0xff;
+	pccb->cmd[4] = ((unsigned char) (start >> 40)) & 0xff;
+	pccb->cmd[5] = ((unsigned char) (start >> 32)) & 0xff;
+	pccb->cmd[6] = ((unsigned char) (start >> 24)) & 0xff;
+	pccb->cmd[7] = ((unsigned char) (start >> 16)) & 0xff;
+	pccb->cmd[8] = ((unsigned char) (start >> 8)) & 0xff;
+	pccb->cmd[9] = ((unsigned char) (start)) & 0xff;
+	pccb->cmd[10] = 0;
+	pccb->cmd[11] = ((unsigned char) (blocks >> 24)) & 0xff;
+	pccb->cmd[12] = ((unsigned char) (blocks >> 16)) & 0xff;
+	pccb->cmd[13] = ((unsigned char) (blocks >> 8)) & 0xff;
+	pccb->cmd[14] = (unsigned char) blocks & 0xff;
+	pccb->cmd[15] = 0;
+	pccb->cmdlen = 16;
+	pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
+	debug ("scsi_setup_read16: cmd: %02X %02X "
+	       "startblk %02X%02X%02X%02X%02X%02X%02X%02X "
+	       "blccnt %02X%02X%02X%02X\n",
+		pccb->cmd[0], pccb->cmd[1],
+		pccb->cmd[2], pccb->cmd[3], pccb->cmd[4], pccb->cmd[5],
+		pccb->cmd[6], pccb->cmd[7], pccb->cmd[8], pccb->cmd[9],
+		pccb->cmd[11], pccb->cmd[12], pccb->cmd[13], pccb->cmd[14]);
+}
+#endif
 
-static int scsi_read_capacity(ccb *pccb, lbaint_t *capacity,
-			      unsigned long *blksz);
-static ulong scsi_read(struct blk_desc *block_dev, lbaint_t blknr,
-		       lbaint_t blkcnt, void *buffer);
-static ulong scsi_write(struct blk_desc *block_dev, lbaint_t blknr,
-			lbaint_t blkcnt, const void *buffer);
+void scsi_setup_read_ext(ccb * pccb, lbaint_t 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, lbaint_t 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]);
+}
 
-/*********************************************************************************
- * (re)-scan the scsi bus and reports scsi device info
- * to the user if mode = 1
- */
-void scsi_scan(int mode)
+void scsi_setup_read6(ccb * pccb, lbaint_t start, unsigned short blocks)
 {
-	unsigned char i,perq,modi,lun;
-	lbaint_t capacity;
-	unsigned long blksz;
-	ccb* pccb=(ccb *)&tempccb;
+	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]);
+}
 
-	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].devnum = 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;
-			part_init(&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;
+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
-		scsi_curr_dev = -1;
+		pccb->cmd[4]=(unsigned char)pccb->datalen;
+	pccb->cmd[5]=0;
+	pccb->cmdlen=6;
+	pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */
+}
 
-	printf("Found %d device(s).\n", scsi_max_devs);
-#ifndef CONFIG_SPL_BUILD
-	setenv_ulong("scsidevs", scsi_max_devs);
+static ulong scsi_read(struct blk_desc *block_dev, lbaint_t blknr,
+		       lbaint_t blkcnt, void *buffer)
+{
+	int device = block_dev->devnum;
+	lbaint_t start, blks;
+	uintptr_t buf_addr;
+	unsigned short smallblks = 0;
+	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;
+#ifdef CONFIG_SYS_64BIT_LBA
+		if (start > SCSI_LBA48_READ) {
+			unsigned long blocks;
+			blocks = min_t(lbaint_t, blks, SCSI_MAX_READ_BLK);
+			pccb->datalen = scsi_dev_desc[device].blksz * blocks;
+			scsi_setup_read16(pccb, start, blocks);
+			start += blocks;
+			blks -= blocks;
+		} else
 #endif
+		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 %" PRIXPTR "\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 %" PRIXPTR "\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(struct blk_desc *block_dev, lbaint_t blknr,
+			lbaint_t blkcnt, const void *buffer)
+{
+	int device = block_dev->devnum;
+	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 %" PRIXPTR "\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 %" PRIXPTR "\n",
+	      __func__, start, smallblks, buf_addr);
+	return blkcnt;
 }
 
 int scsi_get_disk_count(void)
@@ -327,192 +427,69 @@ int do_scsi (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 				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) {
-					part_print(&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_dev_desc[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_dev_desc[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;
-}
-
-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"
-);
-#endif
-
-/****************************************************************************************
- * scsi_read
- */
-
-/* almost the maximum amount of the scsi_ext command.. */
-#define SCSI_MAX_READ_BLK 0xFFFF
-#define SCSI_LBA48_READ	0xFFFFFFF
-
-static ulong scsi_read(struct blk_desc *block_dev, lbaint_t blknr,
-		       lbaint_t blkcnt, void *buffer)
-{
-	int device = block_dev->devnum;
-	lbaint_t start, blks;
-	uintptr_t buf_addr;
-	unsigned short smallblks = 0;
-	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;
-#ifdef CONFIG_SYS_64BIT_LBA
-		if (start > SCSI_LBA48_READ) {
-			unsigned long blocks;
-			blocks = min_t(lbaint_t, blks, SCSI_MAX_READ_BLK);
-			pccb->datalen = scsi_dev_desc[device].blksz * blocks;
-			scsi_setup_read16(pccb, start, blocks);
-			start += blocks;
-			blks -= blocks;
-		} else
-#endif
-		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 %" PRIXPTR "\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 %" PRIXPTR "\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(struct blk_desc *block_dev, lbaint_t blknr,
-			lbaint_t blkcnt, const void *buffer)
-{
-	int device = block_dev->devnum;
-	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 %" PRIXPTR "\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 %" PRIXPTR "\n",
-	      __func__, start, smallblks, buf_addr);
-	return blkcnt;
+			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) {
+					part_print(&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_dev_desc[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_dev_desc[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;
 }
 
+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"
+);
+#endif
+
 /* copy src to dest, skipping leading and trailing blanks
  * and null terminate the string
  */
@@ -630,105 +607,106 @@ void scsi_setup_test_unit_ready(ccb * pccb)
 	pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */
 }
 
-#ifdef CONFIG_SYS_64BIT_LBA
-void scsi_setup_read16(ccb * pccb, lbaint_t start, unsigned long blocks)
-{
-	pccb->cmd[0] = SCSI_READ16;
-	pccb->cmd[1] = pccb->lun<<5;
-	pccb->cmd[2] = ((unsigned char) (start >> 56)) & 0xff;
-	pccb->cmd[3] = ((unsigned char) (start >> 48)) & 0xff;
-	pccb->cmd[4] = ((unsigned char) (start >> 40)) & 0xff;
-	pccb->cmd[5] = ((unsigned char) (start >> 32)) & 0xff;
-	pccb->cmd[6] = ((unsigned char) (start >> 24)) & 0xff;
-	pccb->cmd[7] = ((unsigned char) (start >> 16)) & 0xff;
-	pccb->cmd[8] = ((unsigned char) (start >> 8)) & 0xff;
-	pccb->cmd[9] = ((unsigned char) (start)) & 0xff;
-	pccb->cmd[10] = 0;
-	pccb->cmd[11] = ((unsigned char) (blocks >> 24)) & 0xff;
-	pccb->cmd[12] = ((unsigned char) (blocks >> 16)) & 0xff;
-	pccb->cmd[13] = ((unsigned char) (blocks >> 8)) & 0xff;
-	pccb->cmd[14] = (unsigned char) blocks & 0xff;
-	pccb->cmd[15] = 0;
-	pccb->cmdlen = 16;
-	pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
-	debug ("scsi_setup_read16: cmd: %02X %02X "
-	       "startblk %02X%02X%02X%02X%02X%02X%02X%02X "
-	       "blccnt %02X%02X%02X%02X\n",
-		pccb->cmd[0], pccb->cmd[1],
-		pccb->cmd[2], pccb->cmd[3], pccb->cmd[4], pccb->cmd[5],
-		pccb->cmd[6], pccb->cmd[7], pccb->cmd[8], pccb->cmd[9],
-		pccb->cmd[11], pccb->cmd[12], pccb->cmd[13], pccb->cmd[14]);
-}
-#endif
-
-void scsi_setup_read_ext(ccb * pccb, lbaint_t 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, lbaint_t 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, lbaint_t start, unsigned short blocks)
+/*********************************************************************************
+ * (re)-scan the scsi bus and reports scsi device info
+ * to the user if mode = 1
+ */
+void scsi_scan(int mode)
 {
-	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]);
-}
+	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].devnum = 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;
 
-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;
+			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;
+			part_init(&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
-		pccb->cmd[4]=(unsigned char)pccb->datalen;
-	pccb->cmd[5]=0;
-	pccb->cmdlen=6;
-	pccb->msgout[0]=SCSI_IDENTIFY; /* NOT USED */
+		scsi_curr_dev = -1;
+
+	printf("Found %d device(s).\n", scsi_max_devs);
+#ifndef CONFIG_SPL_BUILD
+	setenv_ulong("scsidevs", scsi_max_devs);
+#endif
 }