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authorDan Williams <dcbw@redhat.com>2008-12-14 12:39:22 -0500
committerGreg Kroah-Hartman <gregkh@suse.de>2009-01-07 10:00:09 -0800
commit281b064f237205053ef1874ffc77b9211265af4c (patch)
tree0a5c9efd36c71fef29eb75cc22dc0ecf43f6e60a
parent49367d8f1d9f26482cf7089489e90f0afd0a942c (diff)
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USB: unusual dev for Option N.V. ZeroCD modems
Many newer Option mobile broadband devices initially provide a usb-storage "driver CD" device that's pretty useless on Linux since any software on it most likely wouldn't be compatible with your kernel or distro anyway. Thus, by default just kill the driver CD device by sending the SCSI 'rezero' command, but allow override of the default behavior via usb-storage module parameter so users can keep the ZeroCD device if they really want to. Inspired by the Sierra TruInstall patch. Signed-off-by: Dan Williams <dcbw@redhat.com> Acked-by: Marcel Holtmann <marcel@holtmann.org> Cc: Peter Henn <p.henn@option.com Cc: Denis Joseph Barrow <D.Barow@option.com> Cc: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
-rw-r--r--drivers/usb/storage/Makefile2
-rw-r--r--drivers/usb/storage/option_ms.c147
-rw-r--r--drivers/usb/storage/option_ms.h4
-rw-r--r--drivers/usb/storage/unusual_devs.h24
-rw-r--r--drivers/usb/storage/usb.c1
5 files changed, 177 insertions, 1 deletions
diff --git a/drivers/usb/storage/Makefile b/drivers/usb/storage/Makefile
index facf610f168..b3206931339 100644
--- a/drivers/usb/storage/Makefile
+++ b/drivers/usb/storage/Makefile
@@ -23,7 +23,7 @@ usb-storage-obj-$(CONFIG_USB_STORAGE_KARMA) += karma.o
usb-storage-obj-$(CONFIG_USB_STORAGE_CYPRESS_ATACB) += cypress_atacb.o
usb-storage-objs := scsiglue.o protocol.o transport.o usb.o \
- initializers.o sierra_ms.o $(usb-storage-obj-y)
+ initializers.o sierra_ms.o option_ms.o $(usb-storage-obj-y)
ifneq ($(CONFIG_USB_LIBUSUAL),)
obj-$(CONFIG_USB) += libusual.o
diff --git a/drivers/usb/storage/option_ms.c b/drivers/usb/storage/option_ms.c
new file mode 100644
index 00000000000..353f922939a
--- /dev/null
+++ b/drivers/usb/storage/option_ms.c
@@ -0,0 +1,147 @@
+/*
+ * Driver for Option High Speed Mobile Devices.
+ *
+ * (c) 2008 Dan Williams <dcbw@redhat.com>
+ *
+ * Inspiration taken from sierra_ms.c by Kevin Lloyd <klloyd@sierrawireless.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/usb.h>
+
+#include "usb.h"
+#include "transport.h"
+#include "option_ms.h"
+#include "debug.h"
+
+#define ZCD_FORCE_MODEM 0x01
+#define ZCD_ALLOW_MS 0x02
+
+static unsigned int option_zero_cd = ZCD_FORCE_MODEM;
+module_param(option_zero_cd, uint, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(option_zero_cd, "ZeroCD mode (1=Force Modem (default),"
+ " 2=Allow CD-Rom");
+
+#define RESPONSE_LEN 1024
+
+static int option_rezero(struct us_data *us, int ep_in, int ep_out)
+{
+ const unsigned char rezero_msg[] = {
+ 0x55, 0x53, 0x42, 0x43, 0x78, 0x56, 0x34, 0x12,
+ 0x01, 0x00, 0x00, 0x00, 0x80, 0x00, 0x06, 0x01,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+ };
+ char *buffer;
+ int result;
+
+ US_DEBUGP("Option MS: %s", "DEVICE MODE SWITCH\n");
+
+ buffer = kzalloc(RESPONSE_LEN, GFP_KERNEL);
+ if (buffer == NULL)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ 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);
+ if (result != USB_STOR_XFER_GOOD) {
+ result = USB_STOR_XFER_ERROR;
+ goto 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),
+ buffer, RESPONSE_LEN, NULL);
+ result = USB_STOR_XFER_GOOD;
+
+out:
+ kfree(buffer);
+ return result;
+}
+
+int option_ms_init(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;
+
+ US_DEBUGP("Option MS: option_ms_init called\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;
+ }
+
+ /* 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);
+ }
+ }
+
+ /* 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;
+ }
+
+ /* 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);
+ if (result != USB_STOR_XFER_GOOD)
+ US_DEBUGP("Option MS: Failed to switch to modem mode.\n");
+ return -EIO;
+ } else if (option_zero_cd == ZCD_ALLOW_MS) {
+ /* Allow Mass Storage mode (keep CD-Rom) */
+ US_DEBUGP("Option MS: %s", "Allowing Mass Storage Mode if device"
+ " requests it\n");
+ }
+
+ return USB_STOR_TRANSPORT_GOOD;
+}
+
diff --git a/drivers/usb/storage/option_ms.h b/drivers/usb/storage/option_ms.h
new file mode 100644
index 00000000000..b6e448cab03
--- /dev/null
+++ b/drivers/usb/storage/option_ms.h
@@ -0,0 +1,4 @@
+#ifndef _OPTION_MS_H_
+#define _OPTION_MS_H_
+extern int option_ms_init(struct us_data *us);
+#endif
diff --git a/drivers/usb/storage/unusual_devs.h b/drivers/usb/storage/unusual_devs.h
index 0fd42a0c794..0330ed53ec1 100644
--- a/drivers/usb/storage/unusual_devs.h
+++ b/drivers/usb/storage/unusual_devs.h
@@ -985,6 +985,18 @@ UNUSUAL_DEV( 0x05ac, 0x120a, 0x0000, 0x9999,
US_SC_DEVICE, US_PR_DEVICE, NULL,
US_FL_FIX_CAPACITY ),
+/* Reported by Dan Williams <dcbw@redhat.com>
+ * Option N.V. mobile broadband modems
+ * Ignore driver CD mode and force into modem mode by default.
+ */
+
+/* Globetrotter HSDPA; mass storage shows up as Qualcomm for vendor */
+UNUSUAL_DEV( 0x05c6, 0x1000, 0x0000, 0x9999,
+ "Option N.V.",
+ "Mass Storage",
+ US_SC_DEVICE, US_PR_DEVICE, option_ms_init,
+ 0),
+
#ifdef CONFIG_USB_STORAGE_JUMPSHOT
UNUSUAL_DEV( 0x05dc, 0x0001, 0x0000, 0x0001,
"Lexar",
@@ -1474,6 +1486,18 @@ UNUSUAL_DEV( 0x0ace, 0x20ff, 0x0101, 0x0101,
US_SC_DEVICE, US_PR_DEVICE, NULL,
US_FL_IGNORE_DEVICE ),
+/* Reported by Dan Williams <dcbw@redhat.com>
+ * Option N.V. mobile broadband modems
+ * Ignore driver CD mode and force into modem mode by default.
+ */
+
+/* iCON 225 */
+UNUSUAL_DEV( 0x0af0, 0x6971, 0x0000, 0x9999,
+ "Option N.V.",
+ "Mass Storage",
+ US_SC_DEVICE, US_PR_DEVICE, option_ms_init,
+ 0),
+
/* Reported by F. Aben <f.aben@option.com>
* This device (wrongly) has a vendor-specific device descriptor.
* The entry is needed so usb-storage can bind to it's mass-storage
diff --git a/drivers/usb/storage/usb.c b/drivers/usb/storage/usb.c
index b25c448d5eb..ce0b580db5e 100644
--- a/drivers/usb/storage/usb.c
+++ b/drivers/usb/storage/usb.c
@@ -100,6 +100,7 @@
#include "cypress_atacb.h"
#endif
#include "sierra_ms.h"
+#include "option_ms.h"
/* Some informational data */
MODULE_AUTHOR("Matthew Dharm <mdharm-usb@one-eyed-alien.net>");