u64 end = calc_future_tsc(IDE_TIMEOUT);
for (;;) {
outb(ATA_CB_DH_DEV1, iobase1 + ATA_CB_DH);
- status = await_not_bsy(iobase1);
+ status = ndelay_await_not_bsy(iobase1);
if (status < 0)
goto done;
if (inb(iobase1 + ATA_CB_DH) == ATA_CB_DH_DEV1)
outb(newdh, iobase1 + ATA_CB_DH);
if ((olddh ^ newdh) & (1<<4)) {
// Was a device change - wait for device to become not busy.
- status = await_not_bsy(iobase1);
+ status = ndelay_await_not_bsy(iobase1);
if (status < 0)
return status;
}
}
static int
-init_drive_atapi(int driveid)
+init_drive_atapi(int driveid, u16 *buffer)
{
// Send an IDENTIFY_DEVICE_PACKET command to device
- u16 buffer[256];
- memset(buffer, 0, sizeof(buffer));
+ memset(buffer, 0, IDE_SECTOR_SIZE);
struct disk_op_s dop;
dop.driveid = driveid;
dop.command = ATA_CMD_IDENTIFY_DEVICE_PACKET;
}
static int
-init_drive_ata(int driveid)
+init_drive_ata(int driveid, u16 *buffer)
{
// Send an IDENTIFY_DEVICE command to device
- u16 buffer[256];
- memset(buffer, 0, sizeof(buffer));
+ memset(buffer, 0, IDE_SECTOR_SIZE);
struct disk_op_s dop;
dop.driveid = driveid;
dop.command = ATA_CMD_IDENTIFY_DEVICE;
continue;
u8 newdh = slave ? ATA_CB_DH_DEV1 : ATA_CB_DH_DEV0;
outb(newdh, iobase1+ATA_CB_DH);
+ ndelay(400);
status = powerup_await_non_bsy(iobase1, end);
if (status < 0)
continue;
}
// check for ATAPI
- int ret = init_drive_atapi(driveid);
- if (!ret)
+ u16 buffer[256];
+ int ret = init_drive_atapi(driveid, buffer);
+ if (!ret) {
// Found an ATAPI drive.
- continue;
-
- u8 st = inb(iobase1+ATA_CB_STAT);
- if (!st)
- // Status not set - can't be a valid drive.
- continue;
-
- // Wait for RDY.
- ret = await_rdy(iobase1);
- if (ret < 0)
- continue;
+ } else {
+ u8 st = inb(iobase1+ATA_CB_STAT);
+ if (!st)
+ // Status not set - can't be a valid drive.
+ continue;
+
+ // Wait for RDY.
+ ret = await_rdy(iobase1);
+ if (ret < 0)
+ continue;
+
+ // check for ATA.
+ ret = init_drive_ata(driveid, buffer);
+ if (ret)
+ // No ATA drive found
+ continue;
+ }
- // check for ATA.
- init_drive_ata(driveid);
+ u16 resetresult = buffer[93];
+ dprintf(6, "ata_detect resetresult=%04x\n", resetresult);
+ if (!slave && (resetresult & 0xdf61) == 0x4041)
+ // resetresult looks valid and device 0 is responding to
+ // device 1 requests - device 1 must not be present - skip
+ // detection.
+ driveid++;
}
printf("\n");