cdc-acm: Add support of ATOL FPrint fiscal printers

commit 15bf722e6f6c0b884521a0363204532e849deb7f upstream.

ATOL FPrint fiscal printers require usb_clear_halt to be executed
to work properly. Add quirk to fix the issue.

Signed-off-by: Alexey Sokolov <sokolov@7pikes.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index 220c0fd059bbe89107435abbe37b6b45e6199e8f..50faef4f056f0e515f3353397cd6fddfb616bd9e 100644 (file)
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -1468,6 +1468,11 @@ skip_countries:
                goto alloc_fail8;
        }
 
+       if (quirks & CLEAR_HALT_CONDITIONS) {
+               usb_clear_halt(usb_dev, usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress));
+               usb_clear_halt(usb_dev, usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress));
+       }
+
        return 0;
 alloc_fail8:
        if (acm->country_codes) {
@@ -1747,6 +1752,10 @@ static const struct usb_device_id acm_ids[] = {
        .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
        },
 
+       { USB_DEVICE(0x2912, 0x0001), /* ATOL FPrint */
+       .driver_info = CLEAR_HALT_CONDITIONS,
+       },
+
        /* Nokia S60 phones expose two ACM channels. The first is
         * a modem and is picked up by the standard AT-command
         * information below. The second is 'vendor-specific' but

diff --git a/drivers/usb/class/cdc-acm.h b/drivers/usb/class/cdc-acm.h
index ffeb3c83941f5a79fe480d85dc140b11d47178ad..b3b6c9db6fe5bd30711faa8a834f2233f859c708 100644 (file)
--- a/drivers/usb/class/cdc-acm.h
+++ b/drivers/usb/class/cdc-acm.h
@@ -133,3 +133,4 @@ struct acm {
 #define NO_DATA_INTERFACE              BIT(4)
 #define IGNORE_DEVICE                  BIT(5)
 #define QUIRK_CONTROL_LINE_STATE       BIT(6)
+#define CLEAR_HALT_CONDITIONS          BIT(7)