From 127e10842b2474ac20e40572a4102dd4d5ed80f1 Mon Sep 17 00:00:00 2001 From: Mahavir Jain Date: Tue, 3 Nov 2009 12:22:10 +0530 Subject: usb: write command for RAW partition. This patch implements write support to usb device with raw partition. It will be useful for filesystem write support to usb device from u-boot in future. Tested with writing kernel image to raw usb disk & booting with usb read command into ram. [Note: run usb part to get info about start sector & number of sectors on a partition for usb write operation.] Signed-off-by: Mahavir Jain --- common/usb_storage.c | 99 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 99 insertions(+) (limited to 'common/usb_storage.c') diff --git a/common/usb_storage.c b/common/usb_storage.c index 391948b189..a8642c9cc5 100644 --- a/common/usb_storage.c +++ b/common/usb_storage.c @@ -168,6 +168,8 @@ int usb_storage_probe(struct usb_device *dev, unsigned int ifnum, struct us_data *ss); unsigned long usb_stor_read(int device, unsigned long blknr, unsigned long blkcnt, void *buffer); +unsigned long usb_stor_write(int device, unsigned long blknr, + unsigned long blkcnt, const void *buffer); struct usb_device * usb_get_dev_index(int index); void uhci_show_temp_int_td(void); @@ -227,6 +229,7 @@ int usb_stor_scan(int mode) usb_dev_desc[i].dev = i; usb_dev_desc[i].part_type = PART_TYPE_UNKNOWN; usb_dev_desc[i].block_read = usb_stor_read; + usb_dev_desc[i].block_write = usb_stor_write; } usb_max_devs = 0; @@ -964,6 +967,22 @@ static int usb_read_10(ccb *srb, struct us_data *ss, unsigned long start, return ss->transport(srb, ss); } +static int usb_write_10(ccb *srb, struct us_data *ss, unsigned long start, + unsigned short blocks) +{ + memset(&srb->cmd[0], 0, 12); + srb->cmd[0] = SCSI_WRITE10; + srb->cmd[2] = ((unsigned char) (start >> 24)) & 0xff; + srb->cmd[3] = ((unsigned char) (start >> 16)) & 0xff; + srb->cmd[4] = ((unsigned char) (start >> 8)) & 0xff; + srb->cmd[5] = ((unsigned char) (start)) & 0xff; + srb->cmd[7] = ((unsigned char) (blocks >> 8)) & 0xff; + srb->cmd[8] = (unsigned char) blocks & 0xff; + srb->cmdlen = 12; + USB_STOR_PRINTF("write10: start %lx blocks %x\n", start, blocks); + return ss->transport(srb, ss); +} + #ifdef CONFIG_USB_BIN_FIXUP /* @@ -1065,6 +1084,86 @@ retry_it: return blkcnt; } +#define USB_MAX_WRITE_BLK 20 + +unsigned long usb_stor_write(int device, unsigned long blknr, + unsigned long blkcnt, const void *buffer) +{ + unsigned long start, blks, buf_addr; + unsigned short smallblks; + struct usb_device *dev; + int retry, i; + ccb *srb = &usb_ccb; + + if (blkcnt == 0) + return 0; + + device &= 0xff; + /* Setup device */ + USB_STOR_PRINTF("\nusb_write: dev %d \n", device); + dev = NULL; + for (i = 0; i < USB_MAX_DEVICE; i++) { + dev = usb_get_dev_index(i); + if (dev == NULL) + return 0; + if (dev->devnum == usb_dev_desc[device].target) + break; + } + + usb_disable_asynch(1); /* asynch transfer not allowed */ + + srb->lun = usb_dev_desc[device].lun; + buf_addr = (unsigned long)buffer; + start = blknr; + blks = blkcnt; + if (usb_test_unit_ready(srb, (struct us_data *)dev->privptr)) { + printf("Device NOT ready\n Request Sense returned %02X %02X" + " %02X\n", srb->sense_buf[2], srb->sense_buf[12], + srb->sense_buf[13]); + return 0; + } + + USB_STOR_PRINTF("\nusb_write: dev %d startblk %lx, blccnt %lx" + " buffer %lx\n", device, start, blks, buf_addr); + + do { + /* If write fails retry for max retry count else + * return with number of blocks written successfully. + */ + retry = 2; + srb->pdata = (unsigned char *)buf_addr; + if (blks > USB_MAX_WRITE_BLK) + smallblks = USB_MAX_WRITE_BLK; + else + smallblks = (unsigned short) blks; +retry_it: + if (smallblks == USB_MAX_WRITE_BLK) + usb_show_progress(); + srb->datalen = usb_dev_desc[device].blksz * smallblks; + srb->pdata = (unsigned char *)buf_addr; + if (usb_write_10(srb, (struct us_data *)dev->privptr, start, + smallblks)) { + USB_STOR_PRINTF("Write ERROR\n"); + usb_request_sense(srb, (struct us_data *)dev->privptr); + if (retry--) + goto retry_it; + blkcnt -= blks; + break; + } + start += smallblks; + blks -= smallblks; + buf_addr += srb->datalen; + } while (blks != 0); + + USB_STOR_PRINTF("usb_write: end startblk %lx, blccnt %x buffer %lx\n", + start, smallblks, buf_addr); + + usb_disable_asynch(0); /* asynch transfer allowed */ + if (blkcnt >= USB_MAX_WRITE_BLK) + printf("\n"); + return blkcnt; + +} /* Probe to see if a new device is actually a Storage device */ int usb_storage_probe(struct usb_device *dev, unsigned int ifnum, -- cgit v1.2.1