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![Greg Kroah-Hartman](/assets/img/avatar_default.png)
Now that the SPDX tag is in all USB files, that identifies the license in a specific and legally-defined manner. So the extra GPL text wording can be removed as it is no longer needed at all. This is done on a quest to remove the 700+ different ways that files in the kernel describe the GPL license text. And there's unneeded stuff like the address (sometimes incorrect) for the FSF which is never needed. No copyright headers or other non-license-description text was removed. Cc: Oliver Neukum <oneukum@suse.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
160 lines
3.8 KiB
C
160 lines
3.8 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Driver for Option High Speed Mobile Devices.
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*
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* (c) 2008 Dan Williams <dcbw@redhat.com>
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*
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* Inspiration taken from sierra_ms.c by Kevin Lloyd <klloyd@sierrawireless.com>
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*/
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#include <linux/usb.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include "usb.h"
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#include "transport.h"
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#include "option_ms.h"
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#include "debug.h"
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#define ZCD_FORCE_MODEM 0x01
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#define ZCD_ALLOW_MS 0x02
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static unsigned int option_zero_cd = ZCD_FORCE_MODEM;
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module_param(option_zero_cd, uint, S_IRUGO | S_IWUSR);
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MODULE_PARM_DESC(option_zero_cd, "ZeroCD mode (1=Force Modem (default),"
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" 2=Allow CD-Rom");
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#define RESPONSE_LEN 1024
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static int option_rezero(struct us_data *us)
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{
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static const unsigned char rezero_msg[] = {
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0x55, 0x53, 0x42, 0x43, 0x78, 0x56, 0x34, 0x12,
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0x01, 0x00, 0x00, 0x00, 0x80, 0x00, 0x06, 0x01,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
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};
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char *buffer;
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int result;
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usb_stor_dbg(us, "Option MS: %s\n", "DEVICE MODE SWITCH");
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buffer = kzalloc(RESPONSE_LEN, GFP_KERNEL);
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if (buffer == NULL)
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return USB_STOR_TRANSPORT_ERROR;
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memcpy(buffer, rezero_msg, sizeof(rezero_msg));
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result = usb_stor_bulk_transfer_buf(us,
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us->send_bulk_pipe,
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buffer, sizeof(rezero_msg), NULL);
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if (result != USB_STOR_XFER_GOOD) {
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result = USB_STOR_XFER_ERROR;
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goto out;
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}
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/*
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* Some of the devices need to be asked for a response, but we don't
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* care what that response is.
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*/
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usb_stor_bulk_transfer_buf(us,
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us->recv_bulk_pipe,
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buffer, RESPONSE_LEN, NULL);
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/* Read the CSW */
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usb_stor_bulk_transfer_buf(us,
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us->recv_bulk_pipe,
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buffer, 13, NULL);
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result = USB_STOR_XFER_GOOD;
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out:
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kfree(buffer);
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return result;
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}
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static int option_inquiry(struct us_data *us)
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{
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static const unsigned char inquiry_msg[] = {
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0x55, 0x53, 0x42, 0x43, 0x12, 0x34, 0x56, 0x78,
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0x24, 0x00, 0x00, 0x00, 0x80, 0x00, 0x06, 0x12,
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0x00, 0x00, 0x00, 0x24, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
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};
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char *buffer;
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int result;
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usb_stor_dbg(us, "Option MS: %s\n", "device inquiry for vendor name");
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buffer = kzalloc(0x24, GFP_KERNEL);
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if (buffer == NULL)
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return USB_STOR_TRANSPORT_ERROR;
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memcpy(buffer, inquiry_msg, sizeof(inquiry_msg));
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result = usb_stor_bulk_transfer_buf(us,
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us->send_bulk_pipe,
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buffer, sizeof(inquiry_msg), NULL);
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if (result != USB_STOR_XFER_GOOD) {
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result = USB_STOR_XFER_ERROR;
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goto out;
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}
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result = usb_stor_bulk_transfer_buf(us,
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us->recv_bulk_pipe,
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buffer, 0x24, NULL);
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if (result != USB_STOR_XFER_GOOD) {
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result = USB_STOR_XFER_ERROR;
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goto out;
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}
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result = memcmp(buffer+8, "Option", 6);
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if (result != 0)
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result = memcmp(buffer+8, "ZCOPTION", 8);
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/* Read the CSW */
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usb_stor_bulk_transfer_buf(us,
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us->recv_bulk_pipe,
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buffer, 13, NULL);
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out:
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kfree(buffer);
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return result;
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}
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int option_ms_init(struct us_data *us)
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{
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int result;
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usb_stor_dbg(us, "Option MS: %s\n", "option_ms_init called");
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/*
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* Additional test for vendor information via INQUIRY,
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* because some vendor/product IDs are ambiguous
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*/
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result = option_inquiry(us);
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if (result != 0) {
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usb_stor_dbg(us, "Option MS: %s\n",
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"vendor is not Option or not determinable, no action taken");
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return 0;
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} else
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usb_stor_dbg(us, "Option MS: %s\n",
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"this is a genuine Option device, proceeding");
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/* Force Modem mode */
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if (option_zero_cd == ZCD_FORCE_MODEM) {
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usb_stor_dbg(us, "Option MS: %s\n", "Forcing Modem Mode");
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result = option_rezero(us);
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if (result != USB_STOR_XFER_GOOD)
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usb_stor_dbg(us, "Option MS: %s\n",
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"Failed to switch to modem mode");
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return -EIO;
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} else if (option_zero_cd == ZCD_ALLOW_MS) {
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/* Allow Mass Storage mode (keep CD-Rom) */
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usb_stor_dbg(us, "Option MS: %s\n",
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"Allowing Mass Storage Mode if device requests it");
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}
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return 0;
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}
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