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path: root/drivers/usb/storage/option_ms.c
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Diffstat (limited to 'drivers/usb/storage/option_ms.c')
-rw-r--r--drivers/usb/storage/option_ms.c124
1 files changed, 71 insertions, 53 deletions
diff --git a/drivers/usb/storage/option_ms.c b/drivers/usb/storage/option_ms.c
index 353f922939a..d41cc0a970f 100644
--- a/drivers/usb/storage/option_ms.c
+++ b/drivers/usb/storage/option_ms.c
@@ -37,7 +37,7 @@ MODULE_PARM_DESC(option_zero_cd, "ZeroCD mode (1=Force Modem (default),"
#define RESPONSE_LEN 1024
-static int option_rezero(struct us_data *us, int ep_in, int ep_out)
+static int option_rezero(struct us_data *us)
{
const unsigned char rezero_msg[] = {
0x55, 0x53, 0x42, 0x43, 0x78, 0x56, 0x34, 0x12,
@@ -54,10 +54,10 @@ static int option_rezero(struct us_data *us, int ep_in, int ep_out)
if (buffer == NULL)
return USB_STOR_TRANSPORT_ERROR;
- memcpy(buffer, rezero_msg, sizeof (rezero_msg));
+ memcpy(buffer, rezero_msg, sizeof(rezero_msg));
result = usb_stor_bulk_transfer_buf(us,
- usb_sndbulkpipe(us->pusb_dev, ep_out),
- buffer, sizeof (rezero_msg), NULL);
+ us->send_bulk_pipe,
+ buffer, sizeof(rezero_msg), NULL);
if (result != USB_STOR_XFER_GOOD) {
result = USB_STOR_XFER_ERROR;
goto out;
@@ -66,9 +66,15 @@ static int option_rezero(struct us_data *us, int ep_in, int ep_out)
/* Some of the devices need to be asked for a response, but we don't
* care what that response is.
*/
- result = usb_stor_bulk_transfer_buf(us,
- usb_sndbulkpipe(us->pusb_dev, ep_out),
+ usb_stor_bulk_transfer_buf(us,
+ us->recv_bulk_pipe,
buffer, RESPONSE_LEN, NULL);
+
+ /* Read the CSW */
+ usb_stor_bulk_transfer_buf(us,
+ us->recv_bulk_pipe,
+ buffer, 13, NULL);
+
result = USB_STOR_XFER_GOOD;
out:
@@ -76,63 +82,75 @@ out:
return result;
}
-int option_ms_init(struct us_data *us)
+static int option_inquiry(struct us_data *us)
{
- struct usb_device *udev;
- struct usb_interface *intf;
- struct usb_host_interface *iface_desc;
- struct usb_endpoint_descriptor *endpoint = NULL;
- u8 ep_in = 0, ep_out = 0;
- int ep_in_size = 0, ep_out_size = 0;
- int i, result;
-
- udev = us->pusb_dev;
- intf = us->pusb_intf;
-
- /* Ensure it's really a ZeroCD device; devices that are already
- * in modem mode return 0xFF for class, subclass, and protocol.
- */
- if (udev->descriptor.bDeviceClass != 0 ||
- udev->descriptor.bDeviceSubClass != 0 ||
- udev->descriptor.bDeviceProtocol != 0)
- return USB_STOR_TRANSPORT_GOOD;
+ const unsigned char inquiry_msg[] = {
+ 0x55, 0x53, 0x42, 0x43, 0x12, 0x34, 0x56, 0x78,
+ 0x24, 0x00, 0x00, 0x00, 0x80, 0x00, 0x06, 0x12,
+ 0x00, 0x00, 0x00, 0x24, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+ };
+ char *buffer;
+ int result;
- US_DEBUGP("Option MS: option_ms_init called\n");
+ US_DEBUGP("Option MS: %s", "device inquiry for vendor name\n");
- /* Find the right mass storage interface */
- iface_desc = intf->cur_altsetting;
- if (iface_desc->desc.bInterfaceClass != 0x8 ||
- iface_desc->desc.bInterfaceSubClass != 0x6 ||
- iface_desc->desc.bInterfaceProtocol != 0x50) {
- US_DEBUGP("Option MS: mass storage interface not found, no action "
- "required\n");
- return USB_STOR_TRANSPORT_GOOD;
- }
+ buffer = kzalloc(0x24, GFP_KERNEL);
+ if (buffer == NULL)
+ return USB_STOR_TRANSPORT_ERROR;
- /* Find the mass storage bulk endpoints */
- for (i = 0; i < iface_desc->desc.bNumEndpoints && (!ep_in_size || !ep_out_size); ++i) {
- endpoint = &iface_desc->endpoint[i].desc;
-
- if (usb_endpoint_is_bulk_in(endpoint)) {
- ep_in = usb_endpoint_num(endpoint);
- ep_in_size = le16_to_cpu(endpoint->wMaxPacketSize);
- } else if (usb_endpoint_is_bulk_out(endpoint)) {
- ep_out = usb_endpoint_num(endpoint);
- ep_out_size = le16_to_cpu(endpoint->wMaxPacketSize);
- }
+ memcpy(buffer, inquiry_msg, sizeof(inquiry_msg));
+ result = usb_stor_bulk_transfer_buf(us,
+ us->send_bulk_pipe,
+ buffer, sizeof(inquiry_msg), NULL);
+ if (result != USB_STOR_XFER_GOOD) {
+ result = USB_STOR_XFER_ERROR;
+ goto out;
}
- /* Can't find the mass storage endpoints */
- if (!ep_in_size || !ep_out_size) {
- US_DEBUGP("Option MS: mass storage endpoints not found, no action "
- "required\n");
- return USB_STOR_TRANSPORT_GOOD;
+ result = usb_stor_bulk_transfer_buf(us,
+ us->recv_bulk_pipe,
+ buffer, 0x24, NULL);
+ if (result != USB_STOR_XFER_GOOD) {
+ result = USB_STOR_XFER_ERROR;
+ goto out;
}
+ result = memcmp(buffer+8, "Option", 6);
+
+ /* Read the CSW */
+ usb_stor_bulk_transfer_buf(us,
+ us->recv_bulk_pipe,
+ buffer, 13, NULL);
+
+out:
+ kfree(buffer);
+ return result;
+}
+
+
+int option_ms_init(struct us_data *us)
+{
+ int result;
+
+ US_DEBUGP("Option MS: option_ms_init called\n");
+
+ /* Additional test for vendor information via INQUIRY,
+ * because some vendor/product IDs are ambiguous
+ */
+ result = option_inquiry(us);
+ if (result != 0) {
+ US_DEBUGP("Option MS: vendor is not Option or not determinable,"
+ " no action taken\n");
+ return 0;
+ } else
+ US_DEBUGP("Option MS: this is a genuine Option device,"
+ " proceeding\n");
+
/* Force Modem mode */
if (option_zero_cd == ZCD_FORCE_MODEM) {
US_DEBUGP("Option MS: %s", "Forcing Modem Mode\n");
- result = option_rezero(us, ep_in, ep_out);
+ result = option_rezero(us);
if (result != USB_STOR_XFER_GOOD)
US_DEBUGP("Option MS: Failed to switch to modem mode.\n");
return -EIO;
@@ -142,6 +160,6 @@ int option_ms_init(struct us_data *us)
" requests it\n");
}
- return USB_STOR_TRANSPORT_GOOD;
+ return 0;
}