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usb: class: Use USB_CLASS_PRINTER instead of number 7

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Kernel provides very nice defines for USB device class
so it's a good idea to use them in suitable places.
It is much easier to grep for such define instead of 7.

Signed-off-by: Krzysztof Opasiak <k.opasiak@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Krzysztof Opasiak 2015-06-22 15:50:22 +02:00 committed by Greg Kroah-Hartman
parent 79a02744bc
commit 298b992fdb
1 changed files with 42 additions and 24 deletions
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66
drivers/usb/class/usblp.c
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@ -57,6 +57,7 @@
#include <linux/mutex.h>
#undef DEBUG
#include <linux/usb.h>
#include <linux/usb/ch9.h>
#include <linux/ratelimit.h>
/*
@ -79,12 +80,20 @@
#define IOCNR_SOFT_RESET 7
/* Get device_id string: */
#define LPIOC_GET_DEVICE_ID(len) _IOC(_IOC_READ, 'P', IOCNR_GET_DEVICE_ID, len)
/* The following ioctls were added for http://hpoj.sourceforge.net: */
/* Get two-int array:
* [0]=current protocol (1=7/1/1, 2=7/1/2, 3=7/1/3),
* [1]=supported protocol mask (mask&(1<<n)!=0 means 7/1/n supported): */
/* The following ioctls were added for http://hpoj.sourceforge.net:
* Get two-int array:
* [0]=current protocol
* (1=USB_CLASS_PRINTER/1/1, 2=USB_CLASS_PRINTER/1/2,
* 3=USB_CLASS_PRINTER/1/3),
* [1]=supported protocol mask (mask&(1<<n)!=0 means
* USB_CLASS_PRINTER/1/n supported):
*/
#define LPIOC_GET_PROTOCOLS(len) _IOC(_IOC_READ, 'P', IOCNR_GET_PROTOCOLS, len)
/* Set protocol (arg: 1=7/1/1, 2=7/1/2, 3=7/1/3): */
/*
* Set protocol
* (arg: 1=USB_CLASS_PRINTER/1/1, 2=USB_CLASS_PRINTER/1/2,
* 3=USB_CLASS_PRINTER/1/3):
*/
#define LPIOC_SET_PROTOCOL _IOC(_IOC_WRITE, 'P', IOCNR_SET_PROTOCOL, 0)
/* Set channel number (HP Vendor-specific command): */
#define LPIOC_HP_SET_CHANNEL _IOC(_IOC_WRITE, 'P', IOCNR_HP_SET_CHANNEL, 0)
@ -146,8 +155,10 @@ struct usblp {
int readcount; /* Counter for reads */
int ifnum; /* Interface number */
struct usb_interface *intf; /* The interface */
/* Alternate-setting numbers and endpoints for each protocol
* (7/1/{index=1,2,3}) that the device supports: */
/*
* Alternate-setting numbers and endpoints for each protocol
* (USB_CLASS_PRINTER/1/{index=1,2,3}) that the device supports:
*/
struct {
int alt_setting;
struct usb_endpoint_descriptor *epwrite;
@ -1206,19 +1217,23 @@ static int usblp_probe(struct usb_interface *intf,
* but our requirements are too intricate for simple match to handle.
*
* The "proto_bias" option may be used to specify the preferred protocol
* for all USB printers (1=7/1/1, 2=7/1/2, 3=7/1/3). If the device
* supports the preferred protocol, then we bind to it.
* for all USB printers (1=USB_CLASS_PRINTER/1/1, 2=USB_CLASS_PRINTER/1/2,
* 3=USB_CLASS_PRINTER/1/3). If the device supports the preferred protocol,
* then we bind to it.
*
* The best interface for us is 7/1/2, because it is compatible
* with a stream of characters. If we find it, we bind to it.
* The best interface for us is USB_CLASS_PRINTER/1/2, because it
* is compatible with a stream of characters. If we find it, we bind to it.
*
* Note that the people from hpoj.sourceforge.net need to be able to
* bind to 7/1/3 (MLC/1284.4), so we provide them ioctls for this purpose.
* bind to USB_CLASS_PRINTER/1/3 (MLC/1284.4), so we provide them ioctls
* for this purpose.
*
* Failing 7/1/2, we look for 7/1/3, even though it's probably not
* stream-compatible, because this matches the behaviour of the old code.
* Failing USB_CLASS_PRINTER/1/2, we look for USB_CLASS_PRINTER/1/3,
* even though it's probably not stream-compatible, because this matches
* the behaviour of the old code.
*
* If nothing else, we bind to 7/1/1 - the unidirectional interface.
* If nothing else, we bind to USB_CLASS_PRINTER/1/1
* - the unidirectional interface.
*/
static int usblp_select_alts(struct usblp *usblp)
{
@ -1236,7 +1251,8 @@ static int usblp_select_alts(struct usblp *usblp)
for (i = 0; i < if_alt->num_altsetting; i++) {
ifd = &if_alt->altsetting[i];
if (ifd->desc.bInterfaceClass != 7 || ifd->desc.bInterfaceSubClass != 1)
if (ifd->desc.bInterfaceClass != USB_CLASS_PRINTER ||
ifd->desc.bInterfaceSubClass != 1)
if (!(usblp->quirks & USBLP_QUIRK_BAD_CLASS))
continue;
@ -1262,8 +1278,10 @@ static int usblp_select_alts(struct usblp *usblp)
if (!epwrite || (ifd->desc.bInterfaceProtocol > 1 && !epread))
continue;
/* Turn off reads for 7/1/1 (unidirectional) interfaces
* and buggy bidirectional printers. */
/*
* Turn off reads for USB_CLASS_PRINTER/1/1 (unidirectional)
* interfaces and buggy bidirectional printers.
*/
if (ifd->desc.bInterfaceProtocol == 1) {
epread = NULL;
} else if (usblp->quirks & USBLP_QUIRK_BIDIR) {
@ -1406,12 +1424,12 @@ static int usblp_resume(struct usb_interface *intf)
}
static const struct usb_device_id usblp_ids[] = {
{ USB_DEVICE_INFO(7, 1, 1) },
{ USB_DEVICE_INFO(7, 1, 2) },
{ USB_DEVICE_INFO(7, 1, 3) },
{ USB_INTERFACE_INFO(7, 1, 1) },
{ USB_INTERFACE_INFO(7, 1, 2) },
{ USB_INTERFACE_INFO(7, 1, 3) },
{ USB_DEVICE_INFO(USB_CLASS_PRINTER, 1, 1) },
{ USB_DEVICE_INFO(USB_CLASS_PRINTER, 1, 2) },
{ USB_DEVICE_INFO(USB_CLASS_PRINTER, 1, 3) },
{ USB_INTERFACE_INFO(USB_CLASS_PRINTER, 1, 1) },
{ USB_INTERFACE_INFO(USB_CLASS_PRINTER, 1, 2) },
{ USB_INTERFACE_INFO(USB_CLASS_PRINTER, 1, 3) },
{ USB_DEVICE(0x04b8, 0x0202) }, /* Seiko Epson Receipt Printer M129C */
{ } /* Terminating entry */
};