#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/hdreg.h>
-#include <linux/ide.h>
+#include <linux/scatterlist.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
#define REG_STATUS 0x80
#define REG_COMMAND 0x80
+/* ATA registers offset definitions */
+#define ATA_REG_ERROR_OFFSET 1
+#define ATA_REG_LCYL_OFFSET 4
+#define ATA_REG_HCYL_OFFSET 5
+#define ATA_REG_STATUS_OFFSET 7
+
/* ATA error definitions not in <linux/hdreg.h> */
#define ATA_ERROR_MEDIA_CHANGE 0x20
/* maximum number of LUNs supported */
unsigned char MaxLUNs;
struct scsi_cmnd srb;
+ struct scatterlist sg;
};
{
struct isd200_info *info = (struct isd200_info *)us->extra;
struct sense_data *buf = (struct sense_data *) &srb->sense_buffer[0];
- unsigned char error = info->ATARegs[IDE_ERROR_OFFSET];
+ unsigned char error = info->ATARegs[ATA_REG_ERROR_OFFSET];
if(error & ATA_ERROR_MEDIA_CHANGE) {
buf->ErrorCode = 0x70 | SENSE_ERRCODE_VALID;
* Transport routines
***********************************************************************/
+/**************************************************************************
+ * isd200_set_srb(), isd200_srb_set_bufflen()
+ *
+ * Two helpers to facilitate in initialization of scsi_cmnd structure
+ * Will need to change when struct scsi_cmnd changes
+ */
+static void isd200_set_srb(struct isd200_info *info,
+ enum dma_data_direction dir, void* buff, unsigned bufflen)
+{
+ struct scsi_cmnd *srb = &info->srb;
+
+ if (buff)
+ sg_init_one(&info->sg, buff, bufflen);
+
+ srb->sc_data_direction = dir;
+ srb->sdb.table.sgl = buff ? &info->sg : NULL;
+ srb->sdb.length = bufflen;
+ srb->sdb.table.nents = buff ? 1 : 0;
+}
+
+static void isd200_srb_set_bufflen(struct scsi_cmnd *srb, unsigned bufflen)
+{
+ srb->sdb.length = bufflen;
+}
+
/**************************************************************************
* isd200_action
ata.generic.RegisterSelect =
REG_CYLINDER_LOW | REG_CYLINDER_HIGH |
REG_STATUS | REG_ERROR;
- srb->sc_data_direction = DMA_FROM_DEVICE;
- srb->request_buffer = pointer;
- srb->request_bufflen = value;
+ isd200_set_srb(info, DMA_FROM_DEVICE, pointer, value);
break;
case ACTION_ENUM:
ACTION_SELECT_5;
ata.generic.RegisterSelect = REG_DEVICE_HEAD;
ata.write.DeviceHeadByte = value;
- srb->sc_data_direction = DMA_NONE;
+ isd200_set_srb(info, DMA_NONE, NULL, 0);
break;
case ACTION_RESET:
ACTION_SELECT_3|ACTION_SELECT_4;
ata.generic.RegisterSelect = REG_DEVICE_CONTROL;
ata.write.DeviceControlByte = ATA_DC_RESET_CONTROLLER;
- srb->sc_data_direction = DMA_NONE;
+ isd200_set_srb(info, DMA_NONE, NULL, 0);
break;
case ACTION_REENABLE:
ACTION_SELECT_3|ACTION_SELECT_4;
ata.generic.RegisterSelect = REG_DEVICE_CONTROL;
ata.write.DeviceControlByte = ATA_DC_REENABLE_CONTROLLER;
- srb->sc_data_direction = DMA_NONE;
+ isd200_set_srb(info, DMA_NONE, NULL, 0);
break;
case ACTION_SOFT_RESET:
ata.generic.RegisterSelect = REG_DEVICE_HEAD | REG_COMMAND;
ata.write.DeviceHeadByte = info->DeviceHead;
ata.write.CommandByte = WIN_SRST;
- srb->sc_data_direction = DMA_NONE;
+ isd200_set_srb(info, DMA_NONE, NULL, 0);
break;
case ACTION_IDENTIFY:
US_DEBUGP(" isd200_action(IDENTIFY)\n");
ata.generic.RegisterSelect = REG_COMMAND;
ata.write.CommandByte = WIN_IDENTIFY;
- srb->sc_data_direction = DMA_FROM_DEVICE;
- srb->request_buffer = (void *) info->id;
- srb->request_bufflen = sizeof(struct hd_driveid);
+ isd200_set_srb(info, DMA_FROM_DEVICE, info->id,
+ sizeof(struct hd_driveid));
break;
default:
US_DEBUGP("Error: Undefined action %d\n",action);
- break;
+ return ISD200_ERROR;
}
memcpy(srb->cmnd, &ata, sizeof(ata.generic));
retStatus = ISD200_ERROR;
} else {
memcpy(info->ATARegs, info->RegsBuf, sizeof(info->ATARegs));
- US_DEBUGP(" Got ATA Register[IDE_ERROR_OFFSET] = 0x%x\n",
- info->ATARegs[IDE_ERROR_OFFSET]);
+ US_DEBUGP(" Got ATA Register[ATA_REG_ERROR_OFFSET] = 0x%x\n",
+ info->ATARegs[ATA_REG_ERROR_OFFSET]);
}
return retStatus;
return;
}
- if ((srb->resid > 0) &&
+ if ((scsi_get_resid(srb) > 0) &&
!((srb->cmnd[0] == REQUEST_SENSE) ||
(srb->cmnd[0] == INQUIRY) ||
(srb->cmnd[0] == MODE_SENSE) ||
break;
if (!detect) {
- if (regs[IDE_STATUS_OFFSET] & BUSY_STAT ) {
+ if (regs[ATA_REG_STATUS_OFFSET] & BUSY_STAT) {
US_DEBUGP(" %s status is still BSY, try again...\n",mstr);
} else {
US_DEBUGP(" %s status !BSY, continue with next operation\n",mstr);
/* check for BUSY_STAT and */
/* WRERR_STAT (workaround ATA Zip drive) and */
/* ERR_STAT (workaround for Archos CD-ROM) */
- else if (regs[IDE_STATUS_OFFSET] &
+ else if (regs[ATA_REG_STATUS_OFFSET] &
(BUSY_STAT | WRERR_STAT | ERR_STAT )) {
US_DEBUGP(" Status indicates it is not ready, try again...\n");
}
/* check for DRDY, ATA devices set DRDY after SRST */
- else if (regs[IDE_STATUS_OFFSET] & READY_STAT) {
+ else if (regs[ATA_REG_STATUS_OFFSET] & READY_STAT) {
US_DEBUGP(" Identified ATA device\n");
info->DeviceFlags |= DF_ATA_DEVICE;
info->DeviceHead = master_slave;
/* check Cylinder High/Low to
determine if it is an ATAPI device
*/
- else if ((regs[IDE_HCYL_OFFSET] == 0xEB) &&
- (regs[IDE_LCYL_OFFSET] == 0x14)) {
+ else if (regs[ATA_REG_HCYL_OFFSET] == 0xEB &&
+ regs[ATA_REG_LCYL_OFFSET] == 0x14) {
/* It seems that the RICOH
MP6200A CD/RW drive will
report itself okay as a
return(retStatus);
}
-/*
- * We are the last non IDE user of the legacy IDE ident structures
- * and we thus want to keep a private copy of this function so the
- * driver can be used without the obsolete drivers/ide layer
- */
-
static void isd200_fix_driveid (struct hd_driveid *id)
{
#ifndef __LITTLE_ENDIAN
return(retStatus);
}
-
/**************************************************************************
* isd200_scsi_to_ata
*
ataCdb->generic.TransferBlockSize = 1;
ataCdb->generic.RegisterSelect = REG_COMMAND;
ataCdb->write.CommandByte = ATA_COMMAND_GET_MEDIA_STATUS;
- srb->request_bufflen = 0;
+ isd200_srb_set_bufflen(srb, 0);
} else {
US_DEBUGP(" Media Status not supported, just report okay\n");
srb->result = SAM_STAT_GOOD;
ataCdb->generic.TransferBlockSize = 1;
ataCdb->generic.RegisterSelect = REG_COMMAND;
ataCdb->write.CommandByte = ATA_COMMAND_GET_MEDIA_STATUS;
- srb->request_bufflen = 0;
+ isd200_srb_set_bufflen(srb, 0);
} else {
US_DEBUGP(" Media Status not supported, just report okay\n");
srb->result = SAM_STAT_GOOD;
ataCdb->generic.RegisterSelect = REG_COMMAND;
ataCdb->write.CommandByte = (srb->cmnd[4] & 0x1) ?
WIN_DOORLOCK : WIN_DOORUNLOCK;
- srb->request_bufflen = 0;
+ isd200_srb_set_bufflen(srb, 0);
} else {
US_DEBUGP(" Not removeable media, just report okay\n");
srb->result = SAM_STAT_GOOD;
ataCdb->generic.TransferBlockSize = 1;
ataCdb->generic.RegisterSelect = REG_COMMAND;
ataCdb->write.CommandByte = ATA_COMMAND_GET_MEDIA_STATUS;
- srb->request_bufflen = 0;
+ isd200_srb_set_bufflen(srb, 0);
} else {
US_DEBUGP(" Nothing to do, just report okay\n");
srb->result = SAM_STAT_GOOD;
void isd200_ata_command(struct scsi_cmnd *srb, struct us_data *us)
{
- int sendToTransport = 1;
+ int sendToTransport = 1, orig_bufflen;
union ata_cdb ataCdb;
/* Make sure driver was initialized */
if (us->extra == NULL)
US_DEBUGP("ERROR Driver not initialized\n");
- /* Convert command */
- srb->resid = 0;
+ scsi_set_resid(srb, 0);
+ /* scsi_bufflen might change in protocol translation to ata */
+ orig_bufflen = scsi_bufflen(srb);
sendToTransport = isd200_scsi_to_ata(srb, us, &ataCdb);
/* send the command to the transport layer */
if (sendToTransport)
isd200_invoke_transport(us, srb, &ataCdb);
+
+ isd200_srb_set_bufflen(srb, orig_bufflen);
}
projects / linux-flexiantxendom0-3.2.10.git / blobdiff