From: Hung-Te Lin hungte@chromium.org
Implement write functionality in the scsi layer. A ''scsi write' command is also added to console for testing.
Signed-off-by: Hung-Te Lin hungte@chromium.org Signed-off-by: Simon Glass sjg@chromium.org ---
common/cmd_scsi.c | 115 +++++++++++++++++++++++++++++++++++++++++++++++++--- 1 files changed, 108 insertions(+), 7 deletions(-)
diff --git a/common/cmd_scsi.c b/common/cmd_scsi.c index 50eb239..31ea788 100644 --- a/common/cmd_scsi.c +++ b/common/cmd_scsi.c @@ -75,11 +75,15 @@ 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 ulong scsi_read(int device, ulong blknr, lbaint_t blkcnt, void *buffer); +static ulong scsi_write(int device, ulong blknr, + lbaint_t blkcnt, const void *buffer);
/********************************************************************************* @@ -109,6 +113,7 @@ void scsi_scan(int mode) 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++) { @@ -335,6 +340,19 @@ 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_RET_USAGE; @@ -346,9 +364,10 @@ 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, ulong 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; @@ -359,7 +378,9 @@ 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) { @@ -376,7 +397,9 @@ 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); + 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; @@ -384,10 +407,65 @@ ulong scsi_read(int device, ulong blknr, ulong blkcnt, void *buffer) } 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 %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, ulong 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 */ @@ -481,6 +559,27 @@ 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; @@ -522,7 +621,9 @@ 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(