Initial revision

1 files changed, 597 insertions, 0 deletions

diff --git a/common/cmd_scsi.c b/common/cmd_scsi.c
new file mode 100644
index 0000000..9b5c69b
--- /dev/null
+++ b/common/cmd_scsi.c
@@ -0,0 +1,597 @@
+/*
+ * (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 <cmd_boot.h>
+#include <asm/processor.h>
+#include <scsi.h>
+#include <image.h>
+#include <cmd_disk.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) {
+		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) {
+		printf ("** Read error on %d:%d\n", dev, part);
+		return 1;
+	}
+	/* Loading ok, update default load address */
+	load_addr = addr;
+
+	flush_cache (addr, (cnt+1)*info.blksz);
+
+	/* Check if we should attempt an auto-start */
+	if (((ep = getenv("autostart")) != NULL) && (strcmp(ep,"yes") == 0)) {
+		char *local_args[2];
+		extern int do_bootm (cmd_tbl_t *, int, int, char *[]);
+		local_args[0] = argv[0];
+		local_args[1] = NULL;
+		printf ("Automatic boot of image at addr 0x%08lX ...\n", addr);
+		rcode = do_bootm (cmdtp, 0, 1, local_args);
+	}
+	 return rcode;
+}
+
+/*********************************************************************************
+ * scsi command intepreter
+ */
+int do_scsi (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+{
+	switch (argc) {
+    case 0:
+    case 1:	printf ("Usage:\n%s\n", cmdtp->usage);	return 1;
+    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<CFG_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 >= CFG_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<CFG_SCSI_MAX_DEVICE; ++dev) {
+					if (scsi_dev_desc[dev].type!=DEV_TYPE_UNKNOWN) {
+						ok++;
+						if (dev)
+							printf("\n");
+						PRINTF("print_part of %x\n",dev);
+							print_part(&scsi_dev_desc[dev]);
+					}
+				}
+				if (!ok)
+					printf("\nno SCSI devices available\n");
+				return 1;
+			}
+			printf ("Usage:\n%s\n", cmdtp->usage);
+			return 1;
+  	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 >= CFG_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;
+			}
+			printf ("Usage:\n%s\n", cmdtp->usage);
+			return 1;
+    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;
+			}
+	} /* switch */
+	printf ("Usage:\n%s\n", cmdtp->usage);
+	return 1;
+}
+
+/****************************************************************************************
+ * scsi_read
+ */
+
+#define SCSI_MAX_READ_BLK 0xFFFF /* almost the maximum amount of the scsi_ext command.. */
+
+ulong scsi_read(int device, ulong blknr, ulong blkcnt, ulong *buffer)
+{
+	ulong start,blks, 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;
+	PRINTF("\nscsi_read: dev %d startblk %lx, blccnt %lx 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;
+		}
+		PRINTF("scsi_read_ext: startblk %lx, 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);
+	PRINTF("scsi_read_ext: end startblk %lx, blccnt %x buffer %lx\n",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;
+		}
+	}
+}
+
+
+/************************************************************************************
+ * 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_capacity(ccb * pccb)
+{
+	pccb->cmd[0]=SCSI_RD_CAPAC;
+	pccb->cmd[1]=pccb->lun<<5;
+	pccb->cmd[2]=0;
+	pccb->cmd[3]=0;
+	pccb->cmd[4]=0;
+	pccb->cmd[5]=0;
+	pccb->cmd[6]=0;
+	pccb->cmd[7]=0;
+	pccb->cmd[8]=0;
+	pccb->cmd[9]=0;
+	pccb->cmdlen=10;
+	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 */
+	PRINTF("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_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 */
+	PRINTF("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 */
+}
+
+#endif /* #if (CONFIG_COMMANDS & CFG_CMD_SCSI) */
+
+