[PATCH] usb-storage: Some minor shuttle_usbat cleanups

A while ago, Matthew Dharm wrote:
> Looks good.  Tho, I would like to see a future patch to do two things:
> 	1) Change comments from C++ style to C-style
> 	2) Make sure we're naming consistently everywhere SCM, USBAT,
> 	USBAT-02 (most noticably needing fixing is the string used at
> 	transport-selection time, but a sweep of all uses to be consistent
> 	would be in order).

Sorry for the long delay, here is a patch to address this. I also clarified
some ATA/ATAPI wording + function names.

Signed-off-by: Daniel Drake <dsd@gentoo.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

 drivers/usb/storage/shuttle_usbat.c |  306 ++++++++++++++++++++----------------
 drivers/usb/storage/shuttle_usbat.h |   66 +++----
 drivers/usb/storage/transport.h     |    2
 drivers/usb/storage/unusual_devs.h  |   10 -
 drivers/usb/storage/usb.c           |    4
 5 files changed, 213 insertions(+), 175 deletions(-)

1 files changed, 172 insertions, 134 deletions

diff --git a/drivers/usb/storage/shuttle_usbat.c b/drivers/usb/storage/shuttle_usbat.c
index bd448d6c3185..33c55a6261bb 100644
--- a/drivers/usb/storage/shuttle_usbat.c
+++ b/drivers/usb/storage/shuttle_usbat.c
@@ -1,4 +1,4 @@
-/* Driver for SCM Microsystems USB-ATAPI cable
+/* Driver for SCM Microsystems (a.k.a. Shuttle) USB-ATAPI cable
  *
  * $Id: shuttle_usbat.c,v 1.17 2002/04/22 03:39:43 mdharm Exp $
  *
@@ -67,10 +67,10 @@ static int usbat_flash_transport(struct scsi_cmnd * srb, struct us_data *us);
 static int usbat_hp8200e_transport(struct scsi_cmnd *srb, struct us_data *us);
 
 /*
- * Convenience function to produce an ATAPI read/write sectors command
+ * Convenience function to produce an ATA read/write sectors command
  * Use cmd=0x20 for read, cmd=0x30 for write
  */
-static void usbat_pack_atapi_sector_cmd(unsigned char *buf,
+static void usbat_pack_ata_sector_cmd(unsigned char *buf,
                                         unsigned char thistime,
                                         u32 sector, unsigned char cmd)
 {
@@ -196,10 +196,12 @@ static int usbat_check_status(struct us_data *us)
         if (rc != USB_STOR_XFER_GOOD)
                 return USB_STOR_TRANSPORT_FAILED;
 
-        if (*reply & 0x01 && *reply != 0x51) // error/check condition (0x51 is ok)
+        /* error/check condition (0x51 is ok) */
+        if (*reply & 0x01 && *reply != 0x51)
                 return USB_STOR_TRANSPORT_FAILED;
 
-        if (*reply & 0x20) // device fault
+        /* device fault */
+        if (*reply & 0x20)
                 return USB_STOR_TRANSPORT_FAILED;
 
         return USB_STOR_TRANSPORT_GOOD;
@@ -222,29 +224,39 @@ static int usbat_set_shuttle_features(struct us_data *us,
         command[0] = 0x40;
         command[1] = USBAT_CMD_SET_FEAT;
 
-        // The only bit relevant to ATA access is bit 6
-        // which defines 8 bit data access (set) or 16 bit (unset)
+        /*
+         * The only bit relevant to ATA access is bit 6
+         * which defines 8 bit data access (set) or 16 bit (unset)
+         */
         command[2] = epp_control;
 
-        // If FCQ is set in the qualifier (defined in R/W cmd), then bits U0, U1,
-        // ET1 and ET2 define an external event to be checked for on event of a
-        // _read_blocks or _write_blocks operation. The read/write will not take
-        // place unless the defined trigger signal is active.
+        /*
+         * If FCQ is set in the qualifier (defined in R/W cmd), then bits U0, U1,
+         * ET1 and ET2 define an external event to be checked for on event of a
+         * _read_blocks or _write_blocks operation. The read/write will not take
+         * place unless the defined trigger signal is active.
+         */
         command[3] = external_trigger;
 
-        // The resultant byte of the mask operation (see mask_byte) is compared for
-        // equivalence with this test pattern. If equal, the read/write will take
-        // place.
+        /*
+         * The resultant byte of the mask operation (see mask_byte) is compared for
+         * equivalence with this test pattern. If equal, the read/write will take
+         * place.
+         */
         command[4] = test_pattern;
 
-        // This value is logically ANDed with the status register field specified
-        // in the read/write command.
+        /*
+         * This value is logically ANDed with the status register field specified
+         * in the read/write command.
+         */
         command[5] = mask_byte;
 
-        // If ALQ is set in the qualifier, this field contains the address of the
-        // registers where the byte count should be read for transferring the data.
-        // If ALQ is not set, then this field contains the number of bytes to be
-        // transferred.
+        /*
+         * If ALQ is set in the qualifier, this field contains the address of the
+         * registers where the byte count should be read for transferring the data.
+         * If ALQ is not set, then this field contains the number of bytes to be
+         * transferred.
+         */
         command[6] = subcountL;
         command[7] = subcountH;
 
@@ -273,26 +285,26 @@ static int usbat_wait_not_busy(struct us_data *us, int minutes)
 
                 if (result!=USB_STOR_XFER_GOOD)
                         return USB_STOR_TRANSPORT_ERROR;
-                if (*status & 0x01) { // check condition
+                if (*status & 0x01) { /* check condition */
                         result = usbat_read(us, USBAT_ATA, 0x10, status);
                         return USB_STOR_TRANSPORT_FAILED;
                 }
-                if (*status & 0x20) // device fault
+                if (*status & 0x20) /* device fault */
                         return USB_STOR_TRANSPORT_FAILED;
 
-                if ((*status & 0x80)==0x00) { // not busy
+                if ((*status & 0x80)==0x00) { /* not busy */
                         US_DEBUGP("Waited not busy for %d steps\n", i);
                         return USB_STOR_TRANSPORT_GOOD;
                 }
 
                 if (i<500)
-                        msleep(10); // 5 seconds
+                        msleep(10); /* 5 seconds */
                 else if (i<700)
-                        msleep(50); // 10 seconds
+                        msleep(50); /* 10 seconds */
                 else if (i<1200)
-                        msleep(100); // 50 seconds
+                        msleep(100); /* 50 seconds */
                 else
-                        msleep(1000); // X minutes
+                        msleep(1000); /* X minutes */
         }
 
         US_DEBUGP("Waited not busy for %d minutes, timing out.\n",
@@ -412,9 +424,12 @@ static int usbat_hp8200e_rw_block_test(struct us_data *us,
 
                 if (i==0) {
                         cmdlen = 16;
-                        // Write to multiple registers
-                        // Not really sure the 0x07, 0x17, 0xfc, 0xe7 is necessary here,
-                        // but that's what came out of the trace every single time.
+                        /*
+                         * Write to multiple registers
+                         * Not really sure the 0x07, 0x17, 0xfc, 0xe7 is
+                         * necessary here, but that's what came out of the
+                         * trace every single time.
+                         */
                         command[0] = 0x40;
                         command[1] = access | USBAT_CMD_WRITE_REGS;
                         command[2] = 0x07;
@@ -426,7 +441,7 @@ static int usbat_hp8200e_rw_block_test(struct us_data *us,
                 } else
                         cmdlen = 8;
 
-                // Conditionally read or write blocks
+                /* Conditionally read or write blocks */
                 command[cmdlen-8] = (direction==DMA_TO_DEVICE ? 0x40 : 0xC0);
                 command[cmdlen-7] = access |
                                 (direction==DMA_TO_DEVICE ?
@@ -456,11 +471,6 @@ static int usbat_hp8200e_rw_block_test(struct us_data *us,
 
                 }
 
-
-                //US_DEBUGP("Transfer %s %d bytes, sg buffers %d\n",
-                //      direction == DMA_TO_DEVICE ? "out" : "in",
-                //      len, use_sg);
-
                 result = usb_stor_bulk_transfer_sg(us,
                         pipe, content, len, use_sg, NULL);
 
@@ -508,9 +518,9 @@ static int usbat_hp8200e_rw_block_test(struct us_data *us,
 
                         if (result!=USB_STOR_XFER_GOOD)
                                 return USB_STOR_TRANSPORT_ERROR;
-                        if (*status & 0x01) // check condition
+                        if (*status & 0x01) /* check condition */
                                 return USB_STOR_TRANSPORT_FAILED;
-                        if (*status & 0x20) // device fault
+                        if (*status & 0x20) /* device fault */
                                 return USB_STOR_TRANSPORT_FAILED;
 
                         US_DEBUGP("Redoing %s\n",
@@ -547,32 +557,32 @@ static int usbat_multiple_write(struct us_data *us,
 
         BUG_ON(num_registers > US_IOBUF_SIZE/2);
 
-        // Write to multiple registers, ATA access
+        /* Write to multiple registers, ATA access */
         command[0] = 0x40;
         command[1] = USBAT_ATA | USBAT_CMD_WRITE_REGS;
 
-        // No relevance
+        /* No relevance */
         command[2] = 0;
         command[3] = 0;
         command[4] = 0;
         command[5] = 0;
 
-        // Number of bytes to be transferred (incl. addresses and data)
+        /* Number of bytes to be transferred (incl. addresses and data) */
         command[6] = LSB_of(num_registers*2);
         command[7] = MSB_of(num_registers*2);
 
-        // The setup command
+        /* The setup command */
         result = usbat_execute_command(us, command, 8);
         if (result != USB_STOR_XFER_GOOD)
                 return USB_STOR_TRANSPORT_ERROR;
 
-        // Create the reg/data, reg/data sequence
+        /* Create the reg/data, reg/data sequence */
         for (i=0; i<num_registers; i++) {
                 data[i<<1] = registers[i];
                 data[1+(i<<1)] = data_out[i];
         }
 
-        // Send the data
+        /* Send the data */
         result = usbat_bulk_write(us, data, num_registers*2);
         if (result != USB_STOR_XFER_GOOD)
                 return USB_STOR_TRANSPORT_ERROR;
@@ -606,17 +616,17 @@ static int usbat_read_blocks(struct us_data *us,
         command[1] = USBAT_ATA | USBAT_CMD_COND_READ_BLOCK;
         command[2] = USBAT_ATA_DATA;
         command[3] = USBAT_ATA_STATUS;
-        command[4] = 0xFD; // Timeout (ms);
+        command[4] = 0xFD; /* Timeout (ms); */
         command[5] = USBAT_QUAL_FCQ;
         command[6] = LSB_of(len);
         command[7] = MSB_of(len);
 
-        // Multiple block read setup command
+        /* Multiple block read setup command */
         result = usbat_execute_command(us, command, 8);
         if (result != USB_STOR_XFER_GOOD)
                 return USB_STOR_TRANSPORT_FAILED;
         
-        // Read the blocks we just asked for
+        /* Read the blocks we just asked for */
         result = usbat_bulk_read(us, buffer, len);
         if (result != USB_STOR_XFER_GOOD)
                 return USB_STOR_TRANSPORT_FAILED;
@@ -647,17 +657,17 @@ static int usbat_write_blocks(struct us_data *us,
         command[1] = USBAT_ATA | USBAT_CMD_COND_WRITE_BLOCK;
         command[2] = USBAT_ATA_DATA;
         command[3] = USBAT_ATA_STATUS;
-        command[4] = 0xFD; // Timeout (ms)
+        command[4] = 0xFD; /* Timeout (ms) */
         command[5] = USBAT_QUAL_FCQ;
         command[6] = LSB_of(len);
         command[7] = MSB_of(len);
 
-        // Multiple block write setup command
+        /* Multiple block write setup command */
         result = usbat_execute_command(us, command, 8);
         if (result != USB_STOR_XFER_GOOD)
                 return USB_STOR_TRANSPORT_FAILED;
         
-        // Write the data
+        /* Write the data */
         result = usbat_bulk_write(us, buffer, len);
         if (result != USB_STOR_XFER_GOOD)
                 return USB_STOR_TRANSPORT_FAILED;
@@ -711,16 +721,20 @@ static int usbat_device_reset(struct us_data *us)
 {
         int rc;
 
-        // Reset peripheral, enable peripheral control signals
-        // (bring reset signal up)
+        /*
+         * Reset peripheral, enable peripheral control signals
+         * (bring reset signal up)
+         */
         rc = usbat_write_user_io(us,
                                                          USBAT_UIO_DRVRST | USBAT_UIO_OE1 | USBAT_UIO_OE0,
                                                          USBAT_UIO_EPAD | USBAT_UIO_1);
         if (rc != USB_STOR_XFER_GOOD)
                 return USB_STOR_TRANSPORT_ERROR;
                         
-        // Enable peripheral control signals
-        // (bring reset signal down)
+        /*
+         * Enable peripheral control signals
+         * (bring reset signal down)
+         */
         rc = usbat_write_user_io(us,
                                                          USBAT_UIO_OE1  | USBAT_UIO_OE0,
                                                          USBAT_UIO_EPAD | USBAT_UIO_1);
@@ -737,7 +751,7 @@ static int usbat_device_enable_cdt(struct us_data *us)
 {
         int rc;
 
-        // Enable peripheral control signals and card detect
+        /* Enable peripheral control signals and card detect */
         rc = usbat_write_user_io(us,
                                                          USBAT_UIO_ACKD | USBAT_UIO_OE1  | USBAT_UIO_OE0,
                                                          USBAT_UIO_EPAD | USBAT_UIO_1);
@@ -786,7 +800,7 @@ static int usbat_flash_check_media(struct us_data *us,
         if (rc != USB_STOR_XFER_GOOD)
                 return USB_STOR_TRANSPORT_ERROR;
 
-        // Check for media existence
+        /* Check for media existence */
         rc = usbat_flash_check_media_present(uio);
         if (rc == USBAT_FLASH_MEDIA_NONE) {
                 info->sense_key = 0x02;
@@ -795,11 +809,11 @@ static int usbat_flash_check_media(struct us_data *us,
                 return USB_STOR_TRANSPORT_FAILED;
         }
 
-        // Check for media change
+        /* Check for media change */
         rc = usbat_flash_check_media_changed(uio);
         if (rc == USBAT_FLASH_MEDIA_CHANGED) {
 
-                // Reset and re-enable card detect
+                /* Reset and re-enable card detect */
                 rc = usbat_device_reset(us);
                 if (rc != USB_STOR_TRANSPORT_GOOD)
                         return rc;
@@ -855,13 +869,13 @@ static int usbat_identify_device(struct us_data *us,
         if (rc != USB_STOR_XFER_GOOD)
                 return USB_STOR_TRANSPORT_ERROR;
 
-        // Check for error bit, or if the command 'fell through'
+        /* Check for error bit, or if the command 'fell through' */
         if (status == 0xA1 || !(status & 0x01)) {
-                // Device is HP 8200
+                /* Device is HP 8200 */
                 US_DEBUGP("usbat_identify_device: Detected HP8200 CDRW\n");
                 info->devicetype = USBAT_DEV_HP8200;
         } else {
-                // Device is a CompactFlash reader/writer
+                /* Device is a CompactFlash reader/writer */
                 US_DEBUGP("usbat_identify_device: Detected Flash reader/writer\n");
                 info->devicetype = USBAT_DEV_FLASH;
         }
@@ -916,7 +930,7 @@ static int usbat_flash_get_sector_count(struct us_data *us,
         if (!reply)
                 return USB_STOR_TRANSPORT_ERROR;
 
-        // ATAPI command : IDENTIFY DEVICE
+        /* ATA command : IDENTIFY DEVICE */
         rc = usbat_multiple_write(us, registers, command, 3);
         if (rc != USB_STOR_XFER_GOOD) {
                 US_DEBUGP("usbat_flash_get_sector_count: Gah! identify_device failed\n");
@@ -924,7 +938,7 @@ static int usbat_flash_get_sector_count(struct us_data *us,
                 goto leave;
         }
 
-        // Read device status
+        /* Read device status */
         if (usbat_get_status(us, &status) != USB_STOR_XFER_GOOD) {
                 rc = USB_STOR_TRANSPORT_ERROR;
                 goto leave;
@@ -932,7 +946,7 @@ static int usbat_flash_get_sector_count(struct us_data *us,
 
         msleep(100);
 
-        // Read the device identification data
+        /* Read the device identification data */
         rc = usbat_read_block(us, reply, 512);
         if (rc != USB_STOR_TRANSPORT_GOOD)
                 goto leave;
@@ -977,19 +991,23 @@ static int usbat_flash_read_data(struct us_data *us,
         if (result != USB_STOR_TRANSPORT_GOOD)
                 return result;
 
-        // we're working in LBA mode.  according to the ATA spec,
-        // we can support up to 28-bit addressing.  I don't know if Jumpshot
-        // supports beyond 24-bit addressing.  It's kind of hard to test
-        // since it requires > 8GB CF card.
+        /*
+         * we're working in LBA mode.  according to the ATA spec,
+         * we can support up to 28-bit addressing.  I don't know if Jumpshot
+         * supports beyond 24-bit addressing.  It's kind of hard to test
+         * since it requires > 8GB CF card.
+         */
 
         if (sector > 0x0FFFFFFF)
                 return USB_STOR_TRANSPORT_ERROR;
 
         totallen = sectors * info->ssize;
 
-        // Since we don't read more than 64 KB at a time, we have to create
-        // a bounce buffer and move the data a piece at a time between the
-        // bounce buffer and the actual transfer buffer.
+        /*
+         * Since we don't read more than 64 KB at a time, we have to create
+         * a bounce buffer and move the data a piece at a time between the
+         * bounce buffer and the actual transfer buffer.
+         */
 
         alloclen = min(totallen, 65536u);
         buffer = kmalloc(alloclen, GFP_NOIO);
@@ -997,27 +1015,29 @@ static int usbat_flash_read_data(struct us_data *us,
                 return USB_STOR_TRANSPORT_ERROR;
 
         do {
-                // loop, never allocate or transfer more than 64k at once
-                // (min(128k, 255*info->ssize) is the real limit)
+                /*
+                 * loop, never allocate or transfer more than 64k at once
+                 * (min(128k, 255*info->ssize) is the real limit)
+                 */
                 len = min(totallen, alloclen);
                 thistime = (len / info->ssize) & 0xff;
  
-                // ATAPI command 0x20 (READ SECTORS)
-                usbat_pack_atapi_sector_cmd(command, thistime, sector, 0x20);
+                /* ATA command 0x20 (READ SECTORS) */
+                usbat_pack_ata_sector_cmd(command, thistime, sector, 0x20);
 
-                // Write/execute ATAPI read command
+                /* Write/execute ATA read command */
                 result = usbat_multiple_write(us, registers, command, 7);
                 if (result != USB_STOR_TRANSPORT_GOOD)
                         goto leave;
 
-                // Read the data we just requested
+                /* Read the data we just requested */
                 result = usbat_read_blocks(us, buffer, len);
                 if (result != USB_STOR_TRANSPORT_GOOD)
                         goto leave;
          
                 US_DEBUGP("usbat_flash_read_data:  %d bytes\n", len);
         
-                // Store the data in the transfer buffer
+                /* Store the data in the transfer buffer */
                 usb_stor_access_xfer_buf(buffer, len, us->srb,
                                          &sg_idx, &sg_offset, TO_XFER_BUF);
 
@@ -1061,19 +1081,23 @@ static int usbat_flash_write_data(struct us_data *us,
         if (result != USB_STOR_TRANSPORT_GOOD)
                 return result;
 
-        // we're working in LBA mode.  according to the ATA spec,
-        // we can support up to 28-bit addressing.  I don't know if Jumpshot
-        // supports beyond 24-bit addressing.  It's kind of hard to test
-        // since it requires > 8GB CF card.
+        /*
+         * we're working in LBA mode.  according to the ATA spec,
+         * we can support up to 28-bit addressing.  I don't know if the device
+         * supports beyond 24-bit addressing.  It's kind of hard to test
+         * since it requires > 8GB media.
+         */
 
         if (sector > 0x0FFFFFFF)
                 return USB_STOR_TRANSPORT_ERROR;
 
         totallen = sectors * info->ssize;
 
-        // Since we don't write more than 64 KB at a time, we have to create
-        // a bounce buffer and move the data a piece at a time between the
-        // bounce buffer and the actual transfer buffer.
+        /*
+         * Since we don't write more than 64 KB at a time, we have to create
+         * a bounce buffer and move the data a piece at a time between the
+         * bounce buffer and the actual transfer buffer.
+         */
 
         alloclen = min(totallen, 65536u);
         buffer = kmalloc(alloclen, GFP_NOIO);
@@ -1081,24 +1105,26 @@ static int usbat_flash_write_data(struct us_data *us,
                 return USB_STOR_TRANSPORT_ERROR;
 
         do {
-                // loop, never allocate or transfer more than 64k at once
-                // (min(128k, 255*info->ssize) is the real limit)
+                /*
+                 * loop, never allocate or transfer more than 64k at once
+                 * (min(128k, 255*info->ssize) is the real limit)
+                 */
                 len = min(totallen, alloclen);
                 thistime = (len / info->ssize) & 0xff;
 
-                // Get the data from the transfer buffer
+                /* Get the data from the transfer buffer */
                 usb_stor_access_xfer_buf(buffer, len, us->srb,
                                          &sg_idx, &sg_offset, FROM_XFER_BUF);
 
-                // ATAPI command 0x30 (WRITE SECTORS)
-                usbat_pack_atapi_sector_cmd(command, thistime, sector, 0x30);           
+                /* ATA command 0x30 (WRITE SECTORS) */
+                usbat_pack_ata_sector_cmd(command, thistime, sector, 0x30);
 
-                // Write/execute ATAPI write command
+                /* Write/execute ATA write command */
                 result = usbat_multiple_write(us, registers, command, 7);
                 if (result != USB_STOR_TRANSPORT_GOOD)
                         goto leave;
 
-                // Write the data
+                /* Write the data */
                 result = usbat_write_blocks(us, buffer, len);
                 if (result != USB_STOR_TRANSPORT_GOOD)
                         goto leave;
@@ -1169,42 +1195,44 @@ static int usbat_hp8200e_handle_read10(struct us_data *us,
                         srb->transfersize);
         }
 
-        // Since we only read in one block at a time, we have to create
-        // a bounce buffer and move the data a piece at a time between the
-        // bounce buffer and the actual transfer buffer.
+        /*
+         * Since we only read in one block at a time, we have to create
+         * a bounce buffer and move the data a piece at a time between the
+         * bounce buffer and the actual transfer buffer.
+         */
 
         len = (65535/srb->transfersize) * srb->transfersize;
         US_DEBUGP("Max read is %d bytes\n", len);
         len = min(len, srb->request_bufflen);
         buffer = kmalloc(len, GFP_NOIO);
-        if (buffer == NULL) // bloody hell!
+        if (buffer == NULL) /* bloody hell! */
                 return USB_STOR_TRANSPORT_FAILED;
         sector = short_pack(data[7+3], data[7+2]);
         sector <<= 16;
         sector |= short_pack(data[7+5], data[7+4]);
         transferred = 0;
 
-        sg_segment = 0; // for keeping track of where we are in
-        sg_offset = 0;  // the scatter/gather list
+        sg_segment = 0; /* for keeping track of where we are in */
+        sg_offset = 0;  /* the scatter/gather list */
 
         while (transferred != srb->request_bufflen) {
 
                 if (len > srb->request_bufflen - transferred)
                         len = srb->request_bufflen - transferred;
 
-                data[3] = len&0xFF;       // (cylL) = expected length (L)
-                data[4] = (len>>8)&0xFF;  // (cylH) = expected length (H)
+                data[3] = len&0xFF;       /* (cylL) = expected length (L) */
+                data[4] = (len>>8)&0xFF;  /* (cylH) = expected length (H) */
 
-                // Fix up the SCSI command sector and num sectors
+                /* Fix up the SCSI command sector and num sectors */
 
-                data[7+2] = MSB_of(sector>>16); // SCSI command sector
+                data[7+2] = MSB_of(sector>>16); /* SCSI command sector */
                 data[7+3] = LSB_of(sector>>16);
                 data[7+4] = MSB_of(sector&0xFFFF);
                 data[7+5] = LSB_of(sector&0xFFFF);
                 if (data[7+0] == GPCMD_READ_CD)
                         data[7+6] = 0;
-                data[7+7] = MSB_of(len / srb->transfersize); // SCSI command
-                data[7+8] = LSB_of(len / srb->transfersize); // num sectors
+                data[7+7] = MSB_of(len / srb->transfersize); /* SCSI command */
+                data[7+8] = LSB_of(len / srb->transfersize); /* num sectors */
 
                 result = usbat_hp8200e_rw_block_test(us, USBAT_ATA, 
                         registers, data, 19,
@@ -1217,16 +1245,16 @@ static int usbat_hp8200e_handle_read10(struct us_data *us,
                 if (result != USB_STOR_TRANSPORT_GOOD)
                         break;
 
-                // Store the data in the transfer buffer
+                /* Store the data in the transfer buffer */
                 usb_stor_access_xfer_buf(buffer, len, srb,
                                  &sg_segment, &sg_offset, TO_XFER_BUF);
 
-                // Update the amount transferred and the sector number
+                /* Update the amount transferred and the sector number */
 
                 transferred += len;
                 sector += len / srb->transfersize;
 
-        } // while transferred != srb->request_bufflen
+        } /* while transferred != srb->request_bufflen */
 
         kfree(buffer);
         return result;
@@ -1237,7 +1265,7 @@ static int usbat_select_and_test_registers(struct us_data *us)
         int selector;
         unsigned char *status = us->iobuf;
 
-        // try device = master, then device = slave.
+        /* try device = master, then device = slave. */
         for (selector = 0xA0; selector <= 0xB0; selector += 0x10) {
                 if (usbat_write(us, USBAT_ATA, USBAT_ATA_DEVICE, selector) !=
                                 USB_STOR_XFER_GOOD)
@@ -1298,7 +1326,7 @@ int init_usbat(struct us_data *us)
         memset(us->extra, 0, sizeof(struct usbat_info));
         info = (struct usbat_info *) (us->extra);
 
-        // Enable peripheral control signals
+        /* Enable peripheral control signals */
         rc = usbat_write_user_io(us,
                                  USBAT_UIO_OE1 | USBAT_UIO_OE0,
                                  USBAT_UIO_EPAD | USBAT_UIO_1);
@@ -1337,7 +1365,7 @@ int init_usbat(struct us_data *us)
 
         US_DEBUGP("INIT 5\n");
 
-        // Enable peripheral control signals and card detect
+        /* Enable peripheral control signals and card detect */
         rc = usbat_device_enable_cdt(us);
         if (rc != USB_STOR_TRANSPORT_GOOD)
                 return rc;
@@ -1364,7 +1392,7 @@ int init_usbat(struct us_data *us)
 
         US_DEBUGP("INIT 9\n");
 
-        // At this point, we need to detect which device we are using
+        /* At this point, we need to detect which device we are using */
         if (usbat_set_transport(us, info))
                 return USB_STOR_TRANSPORT_ERROR;
 
@@ -1414,10 +1442,10 @@ static int usbat_hp8200e_transport(struct scsi_cmnd *srb, struct us_data *us)
         data[0] = 0x00;
         data[1] = 0x00;
         data[2] = 0x00;
-        data[3] = len&0xFF;             // (cylL) = expected length (L)
-        data[4] = (len>>8)&0xFF;        // (cylH) = expected length (H)
-        data[5] = 0xB0;                 // (device sel) = slave
-        data[6] = 0xA0;                 // (command) = ATA PACKET COMMAND
+        data[3] = len&0xFF;             /* (cylL) = expected length (L) */
+        data[4] = (len>>8)&0xFF;        /* (cylH) = expected length (H) */
+        data[5] = 0xB0;                 /* (device sel) = slave */
+        data[6] = 0xA0;                 /* (command) = ATA PACKET COMMAND */
 
         for (i=7; i<19; i++) {
                 registers[i] = 0x10;
@@ -1466,13 +1494,15 @@ static int usbat_hp8200e_transport(struct scsi_cmnd *srb, struct us_data *us)
                 return result;
         }
 
-        // Write the 12-byte command header.
-
-        // If the command is BLANK then set the timer for 75 minutes.
-        // Otherwise set it for 10 minutes.
-
-        // NOTE: THE 8200 DOCUMENTATION STATES THAT BLANKING A CDRW
-        // AT SPEED 4 IS UNRELIABLE!!!
+        /*
+         * Write the 12-byte command header.
+         *
+         * If the command is BLANK then set the timer for 75 minutes.
+         * Otherwise set it for 10 minutes.
+         *
+         * NOTE: THE 8200 DOCUMENTATION STATES THAT BLANKING A CDRW
+         * AT SPEED 4 IS UNRELIABLE!!!
+         */
 
         if ( (result = usbat_write_block(us, 
                         USBAT_ATA, srb->cmnd, 12,
@@ -1481,19 +1511,18 @@ static int usbat_hp8200e_transport(struct scsi_cmnd *srb, struct us_data *us)
                 return result;
         }
 
-        // If there is response data to be read in 
-        // then do it here.
+        /* If there is response data to be read in then do it here. */
 
         if (len != 0 && (srb->sc_data_direction == DMA_FROM_DEVICE)) {
 
-                // How many bytes to read in? Check cylL register
+                /* How many bytes to read in? Check cylL register */
 
                 if (usbat_read(us, USBAT_ATA, USBAT_ATA_LBA_ME, status) != 
                         USB_STOR_XFER_GOOD) {
                         return USB_STOR_TRANSPORT_ERROR;
                 }
 
-                if (len > 0xFF) { // need to read cylH also
+                if (len > 0xFF) { /* need to read cylH also */
                         len = *status;
                         if (usbat_read(us, USBAT_ATA, USBAT_ATA_LBA_HI, status) !=
                                     USB_STOR_XFER_GOOD) {
@@ -1556,13 +1585,16 @@ static int usbat_flash_transport(struct scsi_cmnd * srb, struct us_data *us)
                 if (rc != USB_STOR_TRANSPORT_GOOD)
                         return rc;
 
-                info->ssize = 0x200;  // hard coded 512 byte sectors as per ATA spec
+                /* hard coded 512 byte sectors as per ATA spec */
+                info->ssize = 0x200;
                 US_DEBUGP("usbat_flash_transport: READ_CAPACITY: %ld sectors, %ld bytes per sector\n",
                           info->sectors, info->ssize);
 
-                // build the reply
-                // note: must return the sector number of the last sector,
-                // *not* the total number of sectors
+                /*
+                 * build the reply
+                 * note: must return the sector number of the last sector,
+                 * *not* the total number of sectors
+                 */
                 ((__be32 *) ptr)[0] = cpu_to_be32(info->sectors - 1);
                 ((__be32 *) ptr)[1] = cpu_to_be32(info->ssize);
                 usb_stor_set_xfer_buf(ptr, 8, srb);
@@ -1586,7 +1618,9 @@ static int usbat_flash_transport(struct scsi_cmnd * srb, struct us_data *us)
         }
 
         if (srb->cmnd[0] == READ_12) {
-                // I don't think we'll ever see a READ_12 but support it anyway...
+                /*
+                 * I don't think we'll ever see a READ_12 but support it anyway
+                 */
                 block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
                         ((u32)(srb->cmnd[4]) <<  8) | ((u32)(srb->cmnd[5]));
 
@@ -1608,7 +1642,9 @@ static int usbat_flash_transport(struct scsi_cmnd * srb, struct us_data *us)
         }
 
         if (srb->cmnd[0] == WRITE_12) {
-                // I don't think we'll ever see a WRITE_12 but support it anyway...
+                /*
+                 * I don't think we'll ever see a WRITE_12 but support it anyway
+                 */
                 block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
                         ((u32)(srb->cmnd[4]) <<  8) | ((u32)(srb->cmnd[5]));
 
@@ -1645,8 +1681,10 @@ static int usbat_flash_transport(struct scsi_cmnd * srb, struct us_data *us)
         }
 
         if (srb->cmnd[0] == ALLOW_MEDIUM_REMOVAL) {
-                // sure.  whatever.  not like we can stop the user from popping
-                // the media out of the device (no locking doors, etc)
+                /*
+                 * sure.  whatever.  not like we can stop the user from popping
+                 * the media out of the device (no locking doors, etc)
+                 */
                 return USB_STOR_TRANSPORT_GOOD;
         }