selphy_print/backend_common.c

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/*
* CUPS Backend common code
*
* (c) 2013 Solomon Peachy <pizza@shaftnet.org>
*
* The latest version of this program can be found at:
*
* http://git.shaftnet.org/git/gitweb.cgi?p=selphy_print.git
*
* 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 3 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* [http://www.gnu.org/licenses/gpl-3.0.html]
*
*/
#include <libusb-1.0/libusb.h>
#define STR_LEN_MAX 64
#define DEBUG( ... ) fprintf(stderr, "DEBUG: " __VA_ARGS__ )
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#define DEBUG2( ... ) fprintf(stderr, __VA_ARGS__ )
#define INFO( ... ) fprintf(stderr, "INFO: " __VA_ARGS__ )
#define ERROR( ... ) do { fprintf(stderr, "ERROR: " __VA_ARGS__ ); sleep(1); } while (0)
#if (__BYTE_ORDER == __LITTLE_ENDIAN)
#define le32_to_cpu(__x) __x
#define le16_to_cpu(__x) __x
#define be16_to_cpu(__x) ntohs(__x)
#define be32_to_cpu(__x) ntohl(__x)
#else
#define le32_to_cpu(x) \
({ \
uint32_t __x = (x); \
((uint32_t)( \
(((uint32_t)(__x) & (uint32_t)0x000000ffUL) << 24) | \
(((uint32_t)(__x) & (uint32_t)0x0000ff00UL) << 8) | \
(((uint32_t)(__x) & (uint32_t)0x00ff0000UL) >> 8) | \
(((uint32_t)(__x) & (uint32_t)0xff000000UL) >> 24) )); \
})
#define le16_to_cpu(x) \
({ \
uint16_t __x = (x); \
((uint16_t)( \
(((uint16_t)(__x) & (uint16_t)0x00ff) << 8) | \
(((uint16_t)(__x) & (uint16_t)0xff00) >> 8) | \
})
#define be32_to_cpu(__x) __x
#define be16_to_cpu(__x) __x
#endif
#define ID_BUF_SIZE 2048
static char *get_device_id(struct libusb_device_handle *dev)
{
int length;
int claimed = 0;
int iface = 0;
char *buf = malloc(ID_BUF_SIZE + 1);
claimed = libusb_kernel_driver_active(dev, iface);
if (claimed)
libusb_detach_kernel_driver(dev, iface);
libusb_claim_interface(dev, iface);
if (libusb_control_transfer(dev,
LIBUSB_REQUEST_TYPE_CLASS | LIBUSB_ENDPOINT_IN |
LIBUSB_RECIPIENT_INTERFACE,
0, 0,
(iface << 8),
(unsigned char *)buf, ID_BUF_SIZE, 5000) < 0)
{
*buf = '\0';
goto done;
}
/* length is the first two bytes, MSB first */
length = (((unsigned)buf[0] & 255) << 8) |
((unsigned)buf[1] & 255);
/* Sanity checks */
if (length > ID_BUF_SIZE || length < 14)
length = (((unsigned)buf[1] & 255) << 8) |
((unsigned)buf[0] & 255);
if (length > ID_BUF_SIZE)
length = ID_BUF_SIZE;
if (length < 14) {
*buf = '\0';
goto done;
}
/* Move, and terminate */
memmove(buf, buf + 2, length);
buf[length] = '\0';
done:
libusb_release_interface(dev, iface);
if (claimed)
libusb_attach_kernel_driver(dev, iface);
return buf;
}
static int send_data(struct libusb_device_handle *dev, uint8_t endp,
uint8_t *buf, uint16_t len)
{
int num;
int ret = libusb_bulk_transfer(dev, endp,
buf, len,
&num, 10000);
if (ret < 0) {
ERROR("Failure to send data to printer (libusb error %d: (%d/%d to 0x%02x))\n", ret, num, len, endp);
return ret;
}
return 0;
}
static int terminate = 0;
void sigterm_handler(int signum) {
terminate = 1;
INFO("Job Cancelled");
}