--- /dev/null
+/*
+ * 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;
+}
+
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",
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
projects / GitHub / LineageOS / android_kernel_motorola_exynos9610.git / commitdiff