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[PATCH] USB: Fix HP8200 detection in shuttle_usbat

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Adding flash-device support to the shuttle_usbat driver in 2.6.11
introduced the need to detect which type of device we are dealing with:
CDRW drive, or flash media reader.

The detection routine used turned out to not work for HP8200 CDRW users,
who saw their devices being detected as a flash disk.

This patch (which has been tested on both flash and cdrom) removes some
unnecessary code, moves device detection to much later during
initialization, and introduces a new detection routine which appears to
work.

Signed-off-by: Daniel Drake <dsd@gentoo.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Daniel Drake 2005-08-10 18:30:04 +01:00 committed by Greg Kroah-Hartman
parent 242cf670c0
commit 68a6457edb
1 changed files with 32 additions and 65 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

97
drivers/usb/storage/shuttle_usbat.c
View File

@ -839,34 +839,31 @@ static int usbat_identify_device(struct us_data *us,
rc = usbat_device_reset(us);
if (rc != USB_STOR_TRANSPORT_GOOD)
return rc;
msleep(25);
/*
* By examining the device signature after a reset, we can identify
* whether the device supports the ATAPI packet interface.
* The flash-devices do not support this, whereas the HP CDRW's obviously
* do.
*
* This method is not ideal, but works because no other devices have been
* produced based on the USBAT/USBAT02.
*
* Section 9.1 of the ATAPI-4 spec states (amongst other things) that
* after a device reset, a Cylinder low of 0x14 indicates that the device
* does support packet commands.
* In attempt to distinguish between HP CDRW's and Flash readers, we now
* execute the IDENTIFY PACKET DEVICE command. On ATA devices (i.e. flash
* readers), this command should fail with error. On ATAPI devices (i.e.
* CDROM drives), it should succeed.
*/
rc = usbat_read(us, USBAT_ATA, USBAT_ATA_LBA_ME, &status);
if (rc != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
rc = usbat_write(us, USBAT_ATA, USBAT_ATA_CMD, 0xA1);
if (rc != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
US_DEBUGP("usbat_identify_device: Cylinder low is %02X\n", status);
rc = usbat_get_status(us, &status);
if (rc != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
if (status == 0x14) {
// Check for error bit
if (status & 0x01) {
// Device is a CompactFlash reader/writer
US_DEBUGP("usbat_identify_device: Detected Flash reader/writer\n");
info->devicetype = USBAT_DEV_FLASH;
} else {
// 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
US_DEBUGP("usbat_identify_device: Detected Flash reader/writer\n");
info->devicetype = USBAT_DEV_FLASH;
}
return USB_STOR_TRANSPORT_GOOD;
@ -1239,16 +1236,10 @@ static int usbat_select_and_test_registers(struct us_data *us)
{
int selector;
unsigned char *status = us->iobuf;
unsigned char max_selector = 0xB0;
if (usbat_get_device_type(us) == USBAT_DEV_FLASH)
max_selector = 0xA0;
// try device = master, then device = slave.
for (selector = 0xA0; selector <= max_selector; selector += 0x10) {
if (usbat_get_device_type(us) == USBAT_DEV_HP8200 &&
usbat_write(us, USBAT_ATA, USBAT_ATA_DEVICE, selector) !=
for (selector = 0xA0; selector <= 0xB0; selector += 0x10) {
if (usbat_write(us, USBAT_ATA, USBAT_ATA_DEVICE, selector) !=
USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
@ -1334,60 +1325,30 @@ int init_usbat(struct us_data *us)
US_DEBUGP("INIT 3\n");
// At this point, we need to detect which device we are using
if (usbat_set_transport(us, info))
return USB_STOR_TRANSPORT_ERROR;
US_DEBUGP("INIT 4\n");
if (usbat_get_device_type(us) == USBAT_DEV_HP8200) {
msleep(250);
// Write 0x80 to ISA port 0x3F
rc = usbat_write(us, USBAT_ISA, 0x3F, 0x80);
if (rc != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
US_DEBUGP("INIT 5\n");
// Read ISA port 0x27
rc = usbat_read(us, USBAT_ISA, 0x27, status);
if (rc != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
US_DEBUGP("INIT 6\n");
rc = usbat_read_user_io(us, status);
if (rc != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
US_DEBUGP("INIT 7\n");
}
rc = usbat_select_and_test_registers(us);
if (rc != USB_STOR_TRANSPORT_GOOD)
return rc;
US_DEBUGP("INIT 8\n");
US_DEBUGP("INIT 4\n");
rc = usbat_read_user_io(us, status);
if (rc != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
US_DEBUGP("INIT 9\n");
US_DEBUGP("INIT 5\n");
// Enable peripheral control signals and card detect
rc = usbat_device_enable_cdt(us);
if (rc != USB_STOR_TRANSPORT_GOOD)
return rc;
US_DEBUGP("INIT 10\n");
US_DEBUGP("INIT 6\n");
rc = usbat_read_user_io(us, status);
if (rc != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
US_DEBUGP("INIT 11\n");
US_DEBUGP("INIT 7\n");
msleep(1400);
@ -1395,13 +1356,19 @@ int init_usbat(struct us_data *us)
if (rc != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
US_DEBUGP("INIT 12\n");
US_DEBUGP("INIT 8\n");
rc = usbat_select_and_test_registers(us);
if (rc != USB_STOR_TRANSPORT_GOOD)
return rc;
US_DEBUGP("INIT 13\n");
US_DEBUGP("INIT 9\n");
// At this point, we need to detect which device we are using
if (usbat_set_transport(us, info))
return USB_STOR_TRANSPORT_ERROR;
US_DEBUGP("INIT 10\n");
if (usbat_get_device_type(us) == USBAT_DEV_FLASH) {
subcountH = 0x02;
@ -1412,7 +1379,7 @@ int init_usbat(struct us_data *us)
if (rc != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
US_DEBUGP("INIT 14\n");
US_DEBUGP("INIT 11\n");
return USB_STOR_TRANSPORT_GOOD;
}