X-Git-Url: https://git.kernelconcepts.de/?p=karo-tx-uboot.git;a=blobdiff_plain;f=common%2Fcmd_scsi.c;h=cbc107ea5014fd8f36b5f6b42885ec44ba6dfb36;hp=8019adabfc45010f840a3299c7dc2cbb0de35e63;hb=a9cce7ec02702895ada388ec53ef4b30a40f4bb8;hpb=67d668bf926ae50a1196a8561ae5075fd69a8eb2 diff --git a/common/cmd_scsi.c b/common/cmd_scsi.c index 8019adabfc..cbc107ea50 100644 --- a/common/cmd_scsi.c +++ b/common/cmd_scsi.c @@ -2,26 +2,7 @@ * (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 - * - * - * + * SPDX-License-Identifier: GPL-2.0+ */ /* @@ -29,11 +10,15 @@ */ #include #include +#include #include #include #include #include +#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 @@ -46,11 +31,15 @@ #define SCSI_VEND_ID 0x10b9 #define SCSI_DEV_ID 0x5288 -#else +#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 */ @@ -65,14 +54,20 @@ 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_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); +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); -ulong scsi_read(int device, ulong blknr, ulong blkcnt, void *buffer); +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); /********************************************************************************* @@ -82,7 +77,8 @@ ulong scsi_read(int device, ulong blknr, ulong blkcnt, void *buffer); void scsi_scan(int mode) { unsigned char i,perq,modi,lun; - unsigned long capacity,blksz; + lbaint_t capacity; + unsigned long blksz; ccb* pccb=(ccb *)&tempccb; if(mode==1) { @@ -93,15 +89,18 @@ void scsi_scan(int mode) 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].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;ipdata=(unsigned char *)&tempbuff; pccb->datalen=512; scsi_setup_inquiry(pccb); - if(scsi_exec(pccb)!=TRUE) { + 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 */ @@ -125,7 +124,7 @@ void scsi_scan(int mode) continue; /* skip unknown devices */ } if((modi&0x80)==0x80) /* drive is removable */ - scsi_dev_desc[scsi_max_devs].removable=TRUE; + 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); @@ -138,26 +137,22 @@ void scsi_scan(int mode) pccb->datalen=0; scsi_setup_test_unit_ready(pccb); - if(scsi_exec(pccb)!=TRUE) { - if(scsi_dev_desc[scsi_max_devs].removable==TRUE) { + 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) { + if (scsi_read_capacity(pccb, &capacity, &blksz)) { 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].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: @@ -172,160 +167,74 @@ removable: 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; + } - 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); + 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_VEND_ID,SCSI_DEV_ID,(busdevfunc>>16)&0xFF,(busdevfunc>>11)&0x1F,(busdevfunc>>8)&0x7); + 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[]) { - char *boot_device = NULL; - char *ep; - int dev, part = 0; - ulong addr, cnt; - disk_partition_t info; - image_header_t *hdr; -#if defined(CONFIG_FIT) - const void *fit_hdr = NULL; -#endif - - switch (argc) { - case 1: - addr = CONFIG_SYS_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: - return cmd_usage(cmdtp); - } - - 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((char *)(info.type), BOOT_PART_TYPE, sizeof(info.type)) != 0) && - (strncmp((char *)(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); - - debug ("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; - } - - switch (genimg_get_format ((void *)addr)) { - case IMAGE_FORMAT_LEGACY: - hdr = (image_header_t *)addr; - - if (!image_check_hcrc (hdr)) { - puts ("\n** Bad Header Checksum **\n"); - return 1; - } - - image_print_contents (hdr); - cnt = image_get_image_size (hdr); - break; -#if defined(CONFIG_FIT) - case IMAGE_FORMAT_FIT: - fit_hdr = (const void *)addr; - puts ("Fit image detected...\n"); - - cnt = fit_get_size (fit_hdr); - break; -#endif - default: - puts ("** Unknown image type\n"); - return 1; - } - - cnt += info.blksz - 1; - cnt /= info.blksz; - cnt -= 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; - } - -#if defined(CONFIG_FIT) - /* This cannot be done earlier, we need complete FIT image in RAM first */ - if (genimg_get_format ((void *)addr) == IMAGE_FORMAT_FIT) { - if (!fit_check_format (fit_hdr)) { - puts ("** Bad FIT image format\n"); - return 1; - } - fit_print_contents (fit_hdr); - } -#endif - - /* Loading ok, update default load address */ - load_addr = addr; - - flush_cache (addr, (cnt+1)*info.blksz); - - return bootm_maybe_autostart(cmdtp, argv[0]); + return common_diskboot(cmdtp, "scsi", argc, argv); } /********************************************************************************* @@ -334,10 +243,11 @@ int do_scsiboot (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) int do_scsi (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) { switch (argc) { - case 0: - case 1: return cmd_usage(cmdtp); + case 0: + case 1: + return CMD_RET_USAGE; - case 2: + case 2: if (strncmp(argv[1],"res",3) == 0) { printf("\nReset SCSI\n"); scsi_bus_reset(); @@ -382,7 +292,7 @@ int do_scsi (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) printf("\nno SCSI devices available\n"); return 1; } - return cmd_usage(cmdtp); + return CMD_RET_USAGE; case 3: if (strncmp(argv[1],"dev",3) == 0) { int dev = (int)simple_strtoul(argv[2], NULL, 10); @@ -410,7 +320,7 @@ int do_scsi (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) } return 1; } - return cmd_usage(cmdtp); + return CMD_RET_USAGE; default: /* at least 4 args */ if (strcmp(argv[1],"read") == 0) { @@ -423,9 +333,22 @@ int do_scsi (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) 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_usage(cmdtp); + return CMD_RET_USAGE; } /**************************************************************************************** @@ -434,9 +357,11 @@ int do_scsi (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) #define SCSI_MAX_READ_BLK 0xFFFF /* almost the maximum amount of the scsi_ext command.. */ -ulong scsi_read(int device, ulong blknr, ulong blkcnt, void *buffer) +static ulong scsi_read(int device, lbaint_t blknr, lbaint_t blkcnt, + void *buffer) { - ulong start,blks, buf_addr; + lbaint_t start, blks; + uintptr_t buf_addr; unsigned short smallblks; ccb* pccb=(ccb *)&tempccb; device&=0xff; @@ -447,7 +372,9 @@ ulong scsi_read(int device, ulong blknr, ulong blkcnt, void *buffer) buf_addr=(unsigned long)buffer; start=blknr; blks=blkcnt; - debug ("\nscsi_read: dev %d startblk %lx, blccnt %lx buffer %lx\n",device,start,blks,(unsigned long)buffer); + 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) { @@ -464,18 +391,75 @@ ulong scsi_read(int device, ulong blknr, ulong blkcnt, void *buffer) start+=blks; blks=0; } - debug ("scsi_read_ext: startblk %lx, blccnt %x buffer %lx\n",start,smallblks,buf_addr); - if(scsi_exec(pccb)!=TRUE) { + 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 %lx, blccnt %x buffer %lx\n",start,smallblks,buf_addr); + 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(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 %" 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; +} + /* copy src to dest, skipping leading and trailing blanks * and null terminate the string */ @@ -516,6 +500,67 @@ void scsi_trim_trail (unsigned char *str, unsigned int len) } } +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 @@ -532,23 +577,6 @@ void scsi_setup_test_unit_ready(ccb * pccb) 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; @@ -569,6 +597,27 @@ void scsi_setup_read_ext(ccb * pccb, unsigned long start, unsigned short blocks) 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; @@ -610,7 +659,9 @@ U_BOOT_CMD( "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'" + " 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(