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linux-next/include/linux/yam.h
Dan Carpenter 9e5f172190 yam: integer underflow in yam_ioctl()
We cap bitrate at YAM_MAXBITRATE in yam_ioctl(), but it could also be
negative.  I don't know the impact of using a negative bitrate but let's
prevent it.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-10-17 15:53:09 -04:00

83 lines
2.8 KiB
C

/*****************************************************************************/
/*
* yam.h -- YAM radio modem driver.
*
* Copyright (C) 1998 Frederic Rible F1OAT (frible@teaser.fr)
* Adapted from baycom.c driver written by Thomas Sailer (sailer@ife.ee.ethz.ch)
*
* 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 2 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* Please note that the GPL allows you to use the driver, NOT the radio.
* In order to use the radio, you need a license from the communications
* authority of your country.
*
*
*/
/*****************************************************************************/
#define SIOCYAMRESERVED (0)
#define SIOCYAMSCFG (1) /* Set configuration */
#define SIOCYAMGCFG (2) /* Get configuration */
#define SIOCYAMSMCS (3) /* Set mcs data */
#define YAM_IOBASE (1 << 0)
#define YAM_IRQ (1 << 1)
#define YAM_BITRATE (1 << 2) /* Bit rate of radio port ->57600 */
#define YAM_MODE (1 << 3) /* 0=simplex 1=duplex 2=duplex+tempo */
#define YAM_HOLDDLY (1 << 4) /* duplex tempo (sec) */
#define YAM_TXDELAY (1 << 5) /* Tx Delay (ms) */
#define YAM_TXTAIL (1 << 6) /* Tx Tail (ms) */
#define YAM_PERSIST (1 << 7) /* Persist (ms) */
#define YAM_SLOTTIME (1 << 8) /* Slottime (ms) */
#define YAM_BAUDRATE (1 << 9) /* Baud rate of rs232 port ->115200 */
#define YAM_MAXBITRATE 57600
#define YAM_MAXBAUDRATE 115200
#define YAM_MAXMODE 2
#define YAM_MAXHOLDDLY 99
#define YAM_MAXTXDELAY 999
#define YAM_MAXTXTAIL 999
#define YAM_MAXPERSIST 255
#define YAM_MAXSLOTTIME 999
#define YAM_FPGA_SIZE 5302
struct yamcfg {
unsigned int mask; /* Mask of commands */
unsigned int iobase; /* IO Base of COM port */
unsigned int irq; /* IRQ of COM port */
unsigned int bitrate; /* Bit rate of radio port */
unsigned int baudrate; /* Baud rate of the RS232 port */
unsigned int txdelay; /* TxDelay */
unsigned int txtail; /* TxTail */
unsigned int persist; /* Persistence */
unsigned int slottime; /* Slottime */
unsigned int mode; /* mode 0 (simp), 1(Dupl), 2(Dupl+delay) */
unsigned int holddly; /* PTT delay in FullDuplex 2 mode */
};
struct yamdrv_ioctl_cfg {
int cmd;
struct yamcfg cfg;
};
struct yamdrv_ioctl_mcs {
int cmd;
unsigned int bitrate;
unsigned char bits[YAM_FPGA_SIZE];
};