linux-kernel - [PATCH 3.13.y-ckt 045/132] cdc-acm: Add support of ATOL FPrint fiscal printers

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Message-Id: <1437616850-23266-46-git-send-email-kamal@canonical.com>
Date:	Wed, 22 Jul 2015 18:59:23 -0700
From:	Kamal Mostafa <kamal@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Alexey Sokolov <sokolov@...kes.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Kamal Mostafa <kamal@...onical.com>
Subject: [PATCH 3.13.y-ckt 045/132] cdc-acm: Add support of ATOL FPrint fiscal printers

3.13.11-ckt24 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Alexey Sokolov <sokolov@...kes.com>

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@...kes.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
[ kamal: backport to 3.13-stable: decimal const instead of BIT() ]
Signed-off-by: Kamal Mostafa <kamal@...onical.com>
---
 drivers/usb/class/cdc-acm.c | 9 +++++++++
 drivers/usb/class/cdc-acm.h | 1 +
 2 files changed, 10 insertions(+)

diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index 46321cd..06cdbb4 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -1336,6 +1336,11 @@ 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) {
@@ -1622,6 +1627,10 @@ 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 0f76e4a..9c40036 100644
--- a/drivers/usb/class/cdc-acm.h
+++ b/drivers/usb/class/cdc-acm.h
@@ -129,3 +129,4 @@ struct acm {
 #define NOT_A_MODEM			8
 #define NO_DATA_INTERFACE		16
 #define IGNORE_DEVICE			32
+#define CLEAR_HALT_CONDITIONS		128
-- 
1.9.1

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