1287 строки
34 KiB
C
1287 строки
34 KiB
C
/*****************************************************************************/
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/*
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* baycom_epp.c -- baycom epp radio modem driver.
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*
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* Copyright (C) 1998-2000
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* Thomas Sailer (sailer@ife.ee.ethz.ch)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* Please note that the GPL allows you to use the driver, NOT the radio.
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* In order to use the radio, you need a license from the communications
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* authority of your country.
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*
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*
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* History:
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* 0.1 xx.xx.1998 Initial version by Matthias Welwarsky (dg2fef)
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* 0.2 21.04.1998 Massive rework by Thomas Sailer
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* Integrated FPGA EPP modem configuration routines
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* 0.3 11.05.1998 Took FPGA config out and moved it into a separate program
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* 0.4 26.07.1999 Adapted to new lowlevel parport driver interface
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* 0.5 03.08.1999 adapt to Linus' new __setup/__initcall
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* removed some pre-2.2 kernel compatibility cruft
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* 0.6 10.08.1999 Check if parport can do SPP and is safe to access during interrupt contexts
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* 0.7 12.02.2000 adapted to softnet driver interface
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*
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*/
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/*****************************************************************************/
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#include <linux/crc-ccitt.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/string.h>
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#include <linux/workqueue.h>
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#include <linux/fs.h>
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#include <linux/parport.h>
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#include <linux/if_arp.h>
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#include <linux/hdlcdrv.h>
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#include <linux/baycom.h>
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#include <linux/jiffies.h>
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#include <linux/random.h>
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#include <net/ax25.h>
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#include <asm/uaccess.h>
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/* --------------------------------------------------------------------- */
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#define BAYCOM_DEBUG
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#define BAYCOM_MAGIC 19730510
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/* --------------------------------------------------------------------- */
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static const char paranoia_str[] = KERN_ERR
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"baycom_epp: bad magic number for hdlcdrv_state struct in routine %s\n";
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static const char bc_drvname[] = "baycom_epp";
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static const char bc_drvinfo[] = KERN_INFO "baycom_epp: (C) 1998-2000 Thomas Sailer, HB9JNX/AE4WA\n"
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"baycom_epp: version 0.7 compiled " __TIME__ " " __DATE__ "\n";
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/* --------------------------------------------------------------------- */
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#define NR_PORTS 4
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static struct net_device *baycom_device[NR_PORTS];
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/* --------------------------------------------------------------------- */
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/* EPP status register */
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#define EPP_DCDBIT 0x80
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#define EPP_PTTBIT 0x08
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#define EPP_NREF 0x01
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#define EPP_NRAEF 0x02
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#define EPP_NRHF 0x04
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#define EPP_NTHF 0x20
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#define EPP_NTAEF 0x10
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#define EPP_NTEF EPP_PTTBIT
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/* EPP control register */
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#define EPP_TX_FIFO_ENABLE 0x10
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#define EPP_RX_FIFO_ENABLE 0x08
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#define EPP_MODEM_ENABLE 0x20
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#define EPP_LEDS 0xC0
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#define EPP_IRQ_ENABLE 0x10
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/* LPT registers */
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#define LPTREG_ECONTROL 0x402
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#define LPTREG_CONFIGB 0x401
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#define LPTREG_CONFIGA 0x400
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#define LPTREG_EPPDATA 0x004
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#define LPTREG_EPPADDR 0x003
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#define LPTREG_CONTROL 0x002
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#define LPTREG_STATUS 0x001
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#define LPTREG_DATA 0x000
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/* LPT control register */
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#define LPTCTRL_PROGRAM 0x04 /* 0 to reprogram */
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#define LPTCTRL_WRITE 0x01
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#define LPTCTRL_ADDRSTB 0x08
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#define LPTCTRL_DATASTB 0x02
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#define LPTCTRL_INTEN 0x10
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/* LPT status register */
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#define LPTSTAT_SHIFT_NINTR 6
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#define LPTSTAT_WAIT 0x80
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#define LPTSTAT_NINTR (1<<LPTSTAT_SHIFT_NINTR)
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#define LPTSTAT_PE 0x20
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#define LPTSTAT_DONE 0x10
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#define LPTSTAT_NERROR 0x08
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#define LPTSTAT_EPPTIMEOUT 0x01
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/* LPT data register */
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#define LPTDATA_SHIFT_TDI 0
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#define LPTDATA_SHIFT_TMS 2
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#define LPTDATA_TDI (1<<LPTDATA_SHIFT_TDI)
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#define LPTDATA_TCK 0x02
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#define LPTDATA_TMS (1<<LPTDATA_SHIFT_TMS)
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#define LPTDATA_INITBIAS 0x80
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/* EPP modem config/status bits */
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#define EPP_DCDBIT 0x80
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#define EPP_PTTBIT 0x08
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#define EPP_RXEBIT 0x01
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#define EPP_RXAEBIT 0x02
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#define EPP_RXHFULL 0x04
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#define EPP_NTHF 0x20
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#define EPP_NTAEF 0x10
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#define EPP_NTEF EPP_PTTBIT
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#define EPP_TX_FIFO_ENABLE 0x10
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#define EPP_RX_FIFO_ENABLE 0x08
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#define EPP_MODEM_ENABLE 0x20
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#define EPP_LEDS 0xC0
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#define EPP_IRQ_ENABLE 0x10
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/* Xilinx 4k JTAG instructions */
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#define XC4K_IRLENGTH 3
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#define XC4K_EXTEST 0
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#define XC4K_PRELOAD 1
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#define XC4K_CONFIGURE 5
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#define XC4K_BYPASS 7
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#define EPP_CONVENTIONAL 0
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#define EPP_FPGA 1
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#define EPP_FPGAEXTSTATUS 2
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#define TXBUFFER_SIZE ((HDLCDRV_MAXFLEN*6/5)+8)
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/* ---------------------------------------------------------------------- */
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/*
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* Information that need to be kept for each board.
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*/
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struct baycom_state {
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int magic;
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struct pardevice *pdev;
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struct net_device *dev;
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unsigned int work_running;
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struct delayed_work run_work;
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unsigned int modem;
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unsigned int bitrate;
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unsigned char stat;
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struct {
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unsigned int intclk;
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unsigned int fclk;
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unsigned int bps;
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unsigned int extmodem;
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unsigned int loopback;
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} cfg;
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struct hdlcdrv_channel_params ch_params;
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struct {
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unsigned int bitbuf, bitstream, numbits, state;
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unsigned char *bufptr;
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int bufcnt;
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unsigned char buf[TXBUFFER_SIZE];
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} hdlcrx;
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struct {
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int calibrate;
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int slotcnt;
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int flags;
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enum { tx_idle = 0, tx_keyup, tx_data, tx_tail } state;
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unsigned char *bufptr;
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int bufcnt;
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unsigned char buf[TXBUFFER_SIZE];
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} hdlctx;
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unsigned int ptt_keyed;
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struct sk_buff *skb; /* next transmit packet */
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#ifdef BAYCOM_DEBUG
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struct debug_vals {
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unsigned long last_jiffies;
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unsigned cur_intcnt;
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unsigned last_intcnt;
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int cur_pllcorr;
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int last_pllcorr;
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unsigned int mod_cycles;
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unsigned int demod_cycles;
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} debug_vals;
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#endif /* BAYCOM_DEBUG */
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};
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/* --------------------------------------------------------------------- */
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#define KISS_VERBOSE
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/* --------------------------------------------------------------------- */
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#define PARAM_TXDELAY 1
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#define PARAM_PERSIST 2
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#define PARAM_SLOTTIME 3
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#define PARAM_TXTAIL 4
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#define PARAM_FULLDUP 5
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#define PARAM_HARDWARE 6
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#define PARAM_RETURN 255
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/* --------------------------------------------------------------------- */
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/*
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* the CRC routines are stolen from WAMPES
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* by Dieter Deyke
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*/
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/*---------------------------------------------------------------------------*/
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#if 0
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static inline void append_crc_ccitt(unsigned char *buffer, int len)
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{
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unsigned int crc = 0xffff;
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for (;len>0;len--)
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crc = (crc >> 8) ^ crc_ccitt_table[(crc ^ *buffer++) & 0xff];
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crc ^= 0xffff;
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*buffer++ = crc;
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*buffer++ = crc >> 8;
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}
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#endif
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/*---------------------------------------------------------------------------*/
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static inline int check_crc_ccitt(const unsigned char *buf, int cnt)
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{
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return (crc_ccitt(0xffff, buf, cnt) & 0xffff) == 0xf0b8;
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}
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/*---------------------------------------------------------------------------*/
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static inline int calc_crc_ccitt(const unsigned char *buf, int cnt)
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{
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return (crc_ccitt(0xffff, buf, cnt) ^ 0xffff) & 0xffff;
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}
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/* ---------------------------------------------------------------------- */
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#define tenms_to_flags(bc,tenms) ((tenms * bc->bitrate) / 800)
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/* --------------------------------------------------------------------- */
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static inline void baycom_int_freq(struct baycom_state *bc)
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{
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#ifdef BAYCOM_DEBUG
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unsigned long cur_jiffies = jiffies;
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/*
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* measure the interrupt frequency
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*/
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bc->debug_vals.cur_intcnt++;
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if (time_after_eq(cur_jiffies, bc->debug_vals.last_jiffies + HZ)) {
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bc->debug_vals.last_jiffies = cur_jiffies;
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bc->debug_vals.last_intcnt = bc->debug_vals.cur_intcnt;
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bc->debug_vals.cur_intcnt = 0;
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bc->debug_vals.last_pllcorr = bc->debug_vals.cur_pllcorr;
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bc->debug_vals.cur_pllcorr = 0;
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}
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#endif /* BAYCOM_DEBUG */
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}
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/* ---------------------------------------------------------------------- */
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/*
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* eppconfig_path should be setable via /proc/sys.
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*/
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static char eppconfig_path[256] = "/usr/sbin/eppfpga";
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static char *envp[] = { "HOME=/", "TERM=linux", "PATH=/usr/bin:/bin", NULL };
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/* eppconfig: called during ifconfig up to configure the modem */
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static int eppconfig(struct baycom_state *bc)
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{
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char modearg[256];
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char portarg[16];
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char *argv[] = { eppconfig_path, "-s", "-p", portarg, "-m", modearg,
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NULL };
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/* set up arguments */
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sprintf(modearg, "%sclk,%smodem,fclk=%d,bps=%d,divider=%d%s,extstat",
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bc->cfg.intclk ? "int" : "ext",
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bc->cfg.extmodem ? "ext" : "int", bc->cfg.fclk, bc->cfg.bps,
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(bc->cfg.fclk + 8 * bc->cfg.bps) / (16 * bc->cfg.bps),
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bc->cfg.loopback ? ",loopback" : "");
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sprintf(portarg, "%ld", bc->pdev->port->base);
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printk(KERN_DEBUG "%s: %s -s -p %s -m %s\n", bc_drvname, eppconfig_path, portarg, modearg);
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return call_usermodehelper(eppconfig_path, argv, envp, UMH_WAIT_PROC);
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}
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/* ---------------------------------------------------------------------- */
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static inline void do_kiss_params(struct baycom_state *bc,
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unsigned char *data, unsigned long len)
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{
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#ifdef KISS_VERBOSE
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#define PKP(a,b) printk(KERN_INFO "baycomm_epp: channel params: " a "\n", b)
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#else /* KISS_VERBOSE */
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#define PKP(a,b)
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#endif /* KISS_VERBOSE */
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if (len < 2)
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return;
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switch(data[0]) {
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case PARAM_TXDELAY:
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bc->ch_params.tx_delay = data[1];
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PKP("TX delay = %ums", 10 * bc->ch_params.tx_delay);
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break;
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case PARAM_PERSIST:
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bc->ch_params.ppersist = data[1];
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PKP("p persistence = %u", bc->ch_params.ppersist);
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break;
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case PARAM_SLOTTIME:
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bc->ch_params.slottime = data[1];
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PKP("slot time = %ums", bc->ch_params.slottime);
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break;
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case PARAM_TXTAIL:
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bc->ch_params.tx_tail = data[1];
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PKP("TX tail = %ums", bc->ch_params.tx_tail);
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break;
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case PARAM_FULLDUP:
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bc->ch_params.fulldup = !!data[1];
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PKP("%s duplex", bc->ch_params.fulldup ? "full" : "half");
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break;
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default:
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break;
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}
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#undef PKP
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}
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/* --------------------------------------------------------------------- */
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static void encode_hdlc(struct baycom_state *bc)
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{
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struct sk_buff *skb;
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unsigned char *wp, *bp;
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int pkt_len;
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unsigned bitstream, notbitstream, bitbuf, numbit, crc;
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unsigned char crcarr[2];
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int j;
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if (bc->hdlctx.bufcnt > 0)
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return;
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skb = bc->skb;
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if (!skb)
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return;
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bc->skb = NULL;
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pkt_len = skb->len-1; /* strip KISS byte */
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wp = bc->hdlctx.buf;
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bp = skb->data+1;
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crc = calc_crc_ccitt(bp, pkt_len);
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crcarr[0] = crc;
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crcarr[1] = crc >> 8;
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*wp++ = 0x7e;
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bitstream = bitbuf = numbit = 0;
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while (pkt_len > -2) {
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bitstream >>= 8;
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bitstream |= ((unsigned int)*bp) << 8;
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bitbuf |= ((unsigned int)*bp) << numbit;
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notbitstream = ~bitstream;
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bp++;
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pkt_len--;
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if (!pkt_len)
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bp = crcarr;
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for (j = 0; j < 8; j++)
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if (unlikely(!(notbitstream & (0x1f0 << j)))) {
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bitstream &= ~(0x100 << j);
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bitbuf = (bitbuf & (((2 << j) << numbit) - 1)) |
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((bitbuf & ~(((2 << j) << numbit) - 1)) << 1);
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numbit++;
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notbitstream = ~bitstream;
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}
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numbit += 8;
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while (numbit >= 8) {
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*wp++ = bitbuf;
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bitbuf >>= 8;
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numbit -= 8;
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}
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}
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bitbuf |= 0x7e7e << numbit;
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numbit += 16;
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while (numbit >= 8) {
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*wp++ = bitbuf;
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bitbuf >>= 8;
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numbit -= 8;
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}
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bc->hdlctx.bufptr = bc->hdlctx.buf;
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bc->hdlctx.bufcnt = wp - bc->hdlctx.buf;
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dev_kfree_skb(skb);
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bc->dev->stats.tx_packets++;
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}
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/* ---------------------------------------------------------------------- */
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static int transmit(struct baycom_state *bc, int cnt, unsigned char stat)
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{
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struct parport *pp = bc->pdev->port;
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unsigned char tmp[128];
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int i, j;
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if (bc->hdlctx.state == tx_tail && !(stat & EPP_PTTBIT))
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bc->hdlctx.state = tx_idle;
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if (bc->hdlctx.state == tx_idle && bc->hdlctx.calibrate <= 0) {
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if (bc->hdlctx.bufcnt <= 0)
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encode_hdlc(bc);
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if (bc->hdlctx.bufcnt <= 0)
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return 0;
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if (!bc->ch_params.fulldup) {
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if (!(stat & EPP_DCDBIT)) {
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bc->hdlctx.slotcnt = bc->ch_params.slottime;
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return 0;
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}
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if ((--bc->hdlctx.slotcnt) > 0)
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return 0;
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bc->hdlctx.slotcnt = bc->ch_params.slottime;
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if ((random32() % 256) > bc->ch_params.ppersist)
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return 0;
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}
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}
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if (bc->hdlctx.state == tx_idle && bc->hdlctx.bufcnt > 0) {
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bc->hdlctx.state = tx_keyup;
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bc->hdlctx.flags = tenms_to_flags(bc, bc->ch_params.tx_delay);
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bc->ptt_keyed++;
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}
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while (cnt > 0) {
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switch (bc->hdlctx.state) {
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case tx_keyup:
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i = min_t(int, cnt, bc->hdlctx.flags);
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cnt -= i;
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bc->hdlctx.flags -= i;
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if (bc->hdlctx.flags <= 0)
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bc->hdlctx.state = tx_data;
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memset(tmp, 0x7e, sizeof(tmp));
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while (i > 0) {
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j = (i > sizeof(tmp)) ? sizeof(tmp) : i;
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if (j != pp->ops->epp_write_data(pp, tmp, j, 0))
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return -1;
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i -= j;
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}
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break;
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case tx_data:
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if (bc->hdlctx.bufcnt <= 0) {
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encode_hdlc(bc);
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if (bc->hdlctx.bufcnt <= 0) {
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bc->hdlctx.state = tx_tail;
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bc->hdlctx.flags = tenms_to_flags(bc, bc->ch_params.tx_tail);
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break;
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}
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}
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i = min_t(int, cnt, bc->hdlctx.bufcnt);
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bc->hdlctx.bufcnt -= i;
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cnt -= i;
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if (i != pp->ops->epp_write_data(pp, bc->hdlctx.bufptr, i, 0))
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return -1;
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bc->hdlctx.bufptr += i;
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break;
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case tx_tail:
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encode_hdlc(bc);
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if (bc->hdlctx.bufcnt > 0) {
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bc->hdlctx.state = tx_data;
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break;
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}
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i = min_t(int, cnt, bc->hdlctx.flags);
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if (i) {
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cnt -= i;
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|
bc->hdlctx.flags -= i;
|
|
memset(tmp, 0x7e, sizeof(tmp));
|
|
while (i > 0) {
|
|
j = (i > sizeof(tmp)) ? sizeof(tmp) : i;
|
|
if (j != pp->ops->epp_write_data(pp, tmp, j, 0))
|
|
return -1;
|
|
i -= j;
|
|
}
|
|
break;
|
|
}
|
|
|
|
default: /* fall through */
|
|
if (bc->hdlctx.calibrate <= 0)
|
|
return 0;
|
|
i = min_t(int, cnt, bc->hdlctx.calibrate);
|
|
cnt -= i;
|
|
bc->hdlctx.calibrate -= i;
|
|
memset(tmp, 0, sizeof(tmp));
|
|
while (i > 0) {
|
|
j = (i > sizeof(tmp)) ? sizeof(tmp) : i;
|
|
if (j != pp->ops->epp_write_data(pp, tmp, j, 0))
|
|
return -1;
|
|
i -= j;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* ---------------------------------------------------------------------- */
|
|
|
|
static void do_rxpacket(struct net_device *dev)
|
|
{
|
|
struct baycom_state *bc = netdev_priv(dev);
|
|
struct sk_buff *skb;
|
|
unsigned char *cp;
|
|
unsigned pktlen;
|
|
|
|
if (bc->hdlcrx.bufcnt < 4)
|
|
return;
|
|
if (!check_crc_ccitt(bc->hdlcrx.buf, bc->hdlcrx.bufcnt))
|
|
return;
|
|
pktlen = bc->hdlcrx.bufcnt-2+1; /* KISS kludge */
|
|
if (!(skb = dev_alloc_skb(pktlen))) {
|
|
printk("%s: memory squeeze, dropping packet\n", dev->name);
|
|
dev->stats.rx_dropped++;
|
|
return;
|
|
}
|
|
cp = skb_put(skb, pktlen);
|
|
*cp++ = 0; /* KISS kludge */
|
|
memcpy(cp, bc->hdlcrx.buf, pktlen - 1);
|
|
skb->protocol = ax25_type_trans(skb, dev);
|
|
netif_rx(skb);
|
|
dev->stats.rx_packets++;
|
|
}
|
|
|
|
static int receive(struct net_device *dev, int cnt)
|
|
{
|
|
struct baycom_state *bc = netdev_priv(dev);
|
|
struct parport *pp = bc->pdev->port;
|
|
unsigned int bitbuf, notbitstream, bitstream, numbits, state;
|
|
unsigned char tmp[128];
|
|
unsigned char *cp;
|
|
int cnt2, ret = 0;
|
|
int j;
|
|
|
|
numbits = bc->hdlcrx.numbits;
|
|
state = bc->hdlcrx.state;
|
|
bitstream = bc->hdlcrx.bitstream;
|
|
bitbuf = bc->hdlcrx.bitbuf;
|
|
while (cnt > 0) {
|
|
cnt2 = (cnt > sizeof(tmp)) ? sizeof(tmp) : cnt;
|
|
cnt -= cnt2;
|
|
if (cnt2 != pp->ops->epp_read_data(pp, tmp, cnt2, 0)) {
|
|
ret = -1;
|
|
break;
|
|
}
|
|
cp = tmp;
|
|
for (; cnt2 > 0; cnt2--, cp++) {
|
|
bitstream >>= 8;
|
|
bitstream |= (*cp) << 8;
|
|
bitbuf >>= 8;
|
|
bitbuf |= (*cp) << 8;
|
|
numbits += 8;
|
|
notbitstream = ~bitstream;
|
|
for (j = 0; j < 8; j++) {
|
|
|
|
/* flag or abort */
|
|
if (unlikely(!(notbitstream & (0x0fc << j)))) {
|
|
|
|
/* abort received */
|
|
if (!(notbitstream & (0x1fc << j)))
|
|
state = 0;
|
|
|
|
/* not flag received */
|
|
else if (!(bitstream & (0x1fe << j)) != (0x0fc << j)) {
|
|
if (state)
|
|
do_rxpacket(dev);
|
|
bc->hdlcrx.bufcnt = 0;
|
|
bc->hdlcrx.bufptr = bc->hdlcrx.buf;
|
|
state = 1;
|
|
numbits = 7-j;
|
|
}
|
|
}
|
|
|
|
/* stuffed bit */
|
|
else if (unlikely((bitstream & (0x1f8 << j)) == (0xf8 << j))) {
|
|
numbits--;
|
|
bitbuf = (bitbuf & ((~0xff) << j)) | ((bitbuf & ~((~0xff) << j)) << 1);
|
|
}
|
|
}
|
|
while (state && numbits >= 8) {
|
|
if (bc->hdlcrx.bufcnt >= TXBUFFER_SIZE) {
|
|
state = 0;
|
|
} else {
|
|
*(bc->hdlcrx.bufptr)++ = bitbuf >> (16-numbits);
|
|
bc->hdlcrx.bufcnt++;
|
|
numbits -= 8;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
bc->hdlcrx.numbits = numbits;
|
|
bc->hdlcrx.state = state;
|
|
bc->hdlcrx.bitstream = bitstream;
|
|
bc->hdlcrx.bitbuf = bitbuf;
|
|
return ret;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------- */
|
|
|
|
#ifdef __i386__
|
|
#include <asm/msr.h>
|
|
#define GETTICK(x) \
|
|
({ \
|
|
if (cpu_has_tsc) \
|
|
rdtscl(x); \
|
|
})
|
|
#else /* __i386__ */
|
|
#define GETTICK(x)
|
|
#endif /* __i386__ */
|
|
|
|
static void epp_bh(struct work_struct *work)
|
|
{
|
|
struct net_device *dev;
|
|
struct baycom_state *bc;
|
|
struct parport *pp;
|
|
unsigned char stat;
|
|
unsigned char tmp[2];
|
|
unsigned int time1 = 0, time2 = 0, time3 = 0;
|
|
int cnt, cnt2;
|
|
|
|
bc = container_of(work, struct baycom_state, run_work.work);
|
|
dev = bc->dev;
|
|
if (!bc->work_running)
|
|
return;
|
|
baycom_int_freq(bc);
|
|
pp = bc->pdev->port;
|
|
/* update status */
|
|
if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1)
|
|
goto epptimeout;
|
|
bc->stat = stat;
|
|
bc->debug_vals.last_pllcorr = stat;
|
|
GETTICK(time1);
|
|
if (bc->modem == EPP_FPGAEXTSTATUS) {
|
|
/* get input count */
|
|
tmp[0] = EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE|1;
|
|
if (pp->ops->epp_write_addr(pp, tmp, 1, 0) != 1)
|
|
goto epptimeout;
|
|
if (pp->ops->epp_read_addr(pp, tmp, 2, 0) != 2)
|
|
goto epptimeout;
|
|
cnt = tmp[0] | (tmp[1] << 8);
|
|
cnt &= 0x7fff;
|
|
/* get output count */
|
|
tmp[0] = EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE|2;
|
|
if (pp->ops->epp_write_addr(pp, tmp, 1, 0) != 1)
|
|
goto epptimeout;
|
|
if (pp->ops->epp_read_addr(pp, tmp, 2, 0) != 2)
|
|
goto epptimeout;
|
|
cnt2 = tmp[0] | (tmp[1] << 8);
|
|
cnt2 = 16384 - (cnt2 & 0x7fff);
|
|
/* return to normal */
|
|
tmp[0] = EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE;
|
|
if (pp->ops->epp_write_addr(pp, tmp, 1, 0) != 1)
|
|
goto epptimeout;
|
|
if (transmit(bc, cnt2, stat))
|
|
goto epptimeout;
|
|
GETTICK(time2);
|
|
if (receive(dev, cnt))
|
|
goto epptimeout;
|
|
if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1)
|
|
goto epptimeout;
|
|
bc->stat = stat;
|
|
} else {
|
|
/* try to tx */
|
|
switch (stat & (EPP_NTAEF|EPP_NTHF)) {
|
|
case EPP_NTHF:
|
|
cnt = 2048 - 256;
|
|
break;
|
|
|
|
case EPP_NTAEF:
|
|
cnt = 2048 - 1793;
|
|
break;
|
|
|
|
case 0:
|
|
cnt = 0;
|
|
break;
|
|
|
|
default:
|
|
cnt = 2048 - 1025;
|
|
break;
|
|
}
|
|
if (transmit(bc, cnt, stat))
|
|
goto epptimeout;
|
|
GETTICK(time2);
|
|
/* do receiver */
|
|
while ((stat & (EPP_NRAEF|EPP_NRHF)) != EPP_NRHF) {
|
|
switch (stat & (EPP_NRAEF|EPP_NRHF)) {
|
|
case EPP_NRAEF:
|
|
cnt = 1025;
|
|
break;
|
|
|
|
case 0:
|
|
cnt = 1793;
|
|
break;
|
|
|
|
default:
|
|
cnt = 256;
|
|
break;
|
|
}
|
|
if (receive(dev, cnt))
|
|
goto epptimeout;
|
|
if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1)
|
|
goto epptimeout;
|
|
}
|
|
cnt = 0;
|
|
if (bc->bitrate < 50000)
|
|
cnt = 256;
|
|
else if (bc->bitrate < 100000)
|
|
cnt = 128;
|
|
while (cnt > 0 && stat & EPP_NREF) {
|
|
if (receive(dev, 1))
|
|
goto epptimeout;
|
|
cnt--;
|
|
if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1)
|
|
goto epptimeout;
|
|
}
|
|
}
|
|
GETTICK(time3);
|
|
#ifdef BAYCOM_DEBUG
|
|
bc->debug_vals.mod_cycles = time2 - time1;
|
|
bc->debug_vals.demod_cycles = time3 - time2;
|
|
#endif /* BAYCOM_DEBUG */
|
|
schedule_delayed_work(&bc->run_work, 1);
|
|
if (!bc->skb)
|
|
netif_wake_queue(dev);
|
|
return;
|
|
epptimeout:
|
|
printk(KERN_ERR "%s: EPP timeout!\n", bc_drvname);
|
|
}
|
|
|
|
/* ---------------------------------------------------------------------- */
|
|
/*
|
|
* ===================== network driver interface =========================
|
|
*/
|
|
|
|
static int baycom_send_packet(struct sk_buff *skb, struct net_device *dev)
|
|
{
|
|
struct baycom_state *bc = netdev_priv(dev);
|
|
|
|
if (skb->data[0] != 0) {
|
|
do_kiss_params(bc, skb->data, skb->len);
|
|
dev_kfree_skb(skb);
|
|
return NETDEV_TX_OK;
|
|
}
|
|
if (bc->skb)
|
|
return NETDEV_TX_LOCKED;
|
|
/* strip KISS byte */
|
|
if (skb->len >= HDLCDRV_MAXFLEN+1 || skb->len < 3) {
|
|
dev_kfree_skb(skb);
|
|
return NETDEV_TX_OK;
|
|
}
|
|
netif_stop_queue(dev);
|
|
bc->skb = skb;
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------- */
|
|
|
|
static int baycom_set_mac_address(struct net_device *dev, void *addr)
|
|
{
|
|
struct sockaddr *sa = (struct sockaddr *)addr;
|
|
|
|
/* addr is an AX.25 shifted ASCII mac address */
|
|
memcpy(dev->dev_addr, sa->sa_data, dev->addr_len);
|
|
return 0;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------- */
|
|
|
|
static void epp_wakeup(void *handle)
|
|
{
|
|
struct net_device *dev = (struct net_device *)handle;
|
|
struct baycom_state *bc = netdev_priv(dev);
|
|
|
|
printk(KERN_DEBUG "baycom_epp: %s: why am I being woken up?\n", dev->name);
|
|
if (!parport_claim(bc->pdev))
|
|
printk(KERN_DEBUG "baycom_epp: %s: I'm broken.\n", dev->name);
|
|
}
|
|
|
|
/* --------------------------------------------------------------------- */
|
|
|
|
/*
|
|
* Open/initialize the board. This is called (in the current kernel)
|
|
* sometime after booting when the 'ifconfig' program is run.
|
|
*
|
|
* This routine should set everything up anew at each open, even
|
|
* registers that "should" only need to be set once at boot, so that
|
|
* there is non-reboot way to recover if something goes wrong.
|
|
*/
|
|
|
|
static int epp_open(struct net_device *dev)
|
|
{
|
|
struct baycom_state *bc = netdev_priv(dev);
|
|
struct parport *pp = parport_find_base(dev->base_addr);
|
|
unsigned int i, j;
|
|
unsigned char tmp[128];
|
|
unsigned char stat;
|
|
unsigned long tstart;
|
|
|
|
if (!pp) {
|
|
printk(KERN_ERR "%s: parport at 0x%lx unknown\n", bc_drvname, dev->base_addr);
|
|
return -ENXIO;
|
|
}
|
|
#if 0
|
|
if (pp->irq < 0) {
|
|
printk(KERN_ERR "%s: parport at 0x%lx has no irq\n", bc_drvname, pp->base);
|
|
parport_put_port(pp);
|
|
return -ENXIO;
|
|
}
|
|
#endif
|
|
if ((~pp->modes) & (PARPORT_MODE_TRISTATE | PARPORT_MODE_PCSPP | PARPORT_MODE_SAFEININT)) {
|
|
printk(KERN_ERR "%s: parport at 0x%lx cannot be used\n",
|
|
bc_drvname, pp->base);
|
|
parport_put_port(pp);
|
|
return -EIO;
|
|
}
|
|
memset(&bc->modem, 0, sizeof(bc->modem));
|
|
bc->pdev = parport_register_device(pp, dev->name, NULL, epp_wakeup,
|
|
NULL, PARPORT_DEV_EXCL, dev);
|
|
parport_put_port(pp);
|
|
if (!bc->pdev) {
|
|
printk(KERN_ERR "%s: cannot register parport at 0x%lx\n", bc_drvname, pp->base);
|
|
return -ENXIO;
|
|
}
|
|
if (parport_claim(bc->pdev)) {
|
|
printk(KERN_ERR "%s: parport at 0x%lx busy\n", bc_drvname, pp->base);
|
|
parport_unregister_device(bc->pdev);
|
|
return -EBUSY;
|
|
}
|
|
dev->irq = /*pp->irq*/ 0;
|
|
INIT_DELAYED_WORK(&bc->run_work, epp_bh);
|
|
bc->work_running = 1;
|
|
bc->modem = EPP_CONVENTIONAL;
|
|
if (eppconfig(bc))
|
|
printk(KERN_INFO "%s: no FPGA detected, assuming conventional EPP modem\n", bc_drvname);
|
|
else
|
|
bc->modem = /*EPP_FPGA*/ EPP_FPGAEXTSTATUS;
|
|
parport_write_control(pp, LPTCTRL_PROGRAM); /* prepare EPP mode; we aren't using interrupts */
|
|
/* reset the modem */
|
|
tmp[0] = 0;
|
|
tmp[1] = EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE;
|
|
if (pp->ops->epp_write_addr(pp, tmp, 2, 0) != 2)
|
|
goto epptimeout;
|
|
/* autoprobe baud rate */
|
|
tstart = jiffies;
|
|
i = 0;
|
|
while (time_before(jiffies, tstart + HZ/3)) {
|
|
if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1)
|
|
goto epptimeout;
|
|
if ((stat & (EPP_NRAEF|EPP_NRHF)) == EPP_NRHF) {
|
|
schedule();
|
|
continue;
|
|
}
|
|
if (pp->ops->epp_read_data(pp, tmp, 128, 0) != 128)
|
|
goto epptimeout;
|
|
if (pp->ops->epp_read_data(pp, tmp, 128, 0) != 128)
|
|
goto epptimeout;
|
|
i += 256;
|
|
}
|
|
for (j = 0; j < 256; j++) {
|
|
if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1)
|
|
goto epptimeout;
|
|
if (!(stat & EPP_NREF))
|
|
break;
|
|
if (pp->ops->epp_read_data(pp, tmp, 1, 0) != 1)
|
|
goto epptimeout;
|
|
i++;
|
|
}
|
|
tstart = jiffies - tstart;
|
|
bc->bitrate = i * (8 * HZ) / tstart;
|
|
j = 1;
|
|
i = bc->bitrate >> 3;
|
|
while (j < 7 && i > 150) {
|
|
j++;
|
|
i >>= 1;
|
|
}
|
|
printk(KERN_INFO "%s: autoprobed bitrate: %d int divider: %d int rate: %d\n",
|
|
bc_drvname, bc->bitrate, j, bc->bitrate >> (j+2));
|
|
tmp[0] = EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE/*|j*/;
|
|
if (pp->ops->epp_write_addr(pp, tmp, 1, 0) != 1)
|
|
goto epptimeout;
|
|
/*
|
|
* initialise hdlc variables
|
|
*/
|
|
bc->hdlcrx.state = 0;
|
|
bc->hdlcrx.numbits = 0;
|
|
bc->hdlctx.state = tx_idle;
|
|
bc->hdlctx.bufcnt = 0;
|
|
bc->hdlctx.slotcnt = bc->ch_params.slottime;
|
|
bc->hdlctx.calibrate = 0;
|
|
/* start the bottom half stuff */
|
|
schedule_delayed_work(&bc->run_work, 1);
|
|
netif_start_queue(dev);
|
|
return 0;
|
|
|
|
epptimeout:
|
|
printk(KERN_ERR "%s: epp timeout during bitrate probe\n", bc_drvname);
|
|
parport_write_control(pp, 0); /* reset the adapter */
|
|
parport_release(bc->pdev);
|
|
parport_unregister_device(bc->pdev);
|
|
return -EIO;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------- */
|
|
|
|
static int epp_close(struct net_device *dev)
|
|
{
|
|
struct baycom_state *bc = netdev_priv(dev);
|
|
struct parport *pp = bc->pdev->port;
|
|
unsigned char tmp[1];
|
|
|
|
bc->work_running = 0;
|
|
cancel_delayed_work_sync(&bc->run_work);
|
|
bc->stat = EPP_DCDBIT;
|
|
tmp[0] = 0;
|
|
pp->ops->epp_write_addr(pp, tmp, 1, 0);
|
|
parport_write_control(pp, 0); /* reset the adapter */
|
|
parport_release(bc->pdev);
|
|
parport_unregister_device(bc->pdev);
|
|
if (bc->skb)
|
|
dev_kfree_skb(bc->skb);
|
|
bc->skb = NULL;
|
|
printk(KERN_INFO "%s: close epp at iobase 0x%lx irq %u\n",
|
|
bc_drvname, dev->base_addr, dev->irq);
|
|
return 0;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------- */
|
|
|
|
static int baycom_setmode(struct baycom_state *bc, const char *modestr)
|
|
{
|
|
const char *cp;
|
|
|
|
if (strstr(modestr,"intclk"))
|
|
bc->cfg.intclk = 1;
|
|
if (strstr(modestr,"extclk"))
|
|
bc->cfg.intclk = 0;
|
|
if (strstr(modestr,"intmodem"))
|
|
bc->cfg.extmodem = 0;
|
|
if (strstr(modestr,"extmodem"))
|
|
bc->cfg.extmodem = 1;
|
|
if (strstr(modestr,"noloopback"))
|
|
bc->cfg.loopback = 0;
|
|
if (strstr(modestr,"loopback"))
|
|
bc->cfg.loopback = 1;
|
|
if ((cp = strstr(modestr,"fclk="))) {
|
|
bc->cfg.fclk = simple_strtoul(cp+5, NULL, 0);
|
|
if (bc->cfg.fclk < 1000000)
|
|
bc->cfg.fclk = 1000000;
|
|
if (bc->cfg.fclk > 25000000)
|
|
bc->cfg.fclk = 25000000;
|
|
}
|
|
if ((cp = strstr(modestr,"bps="))) {
|
|
bc->cfg.bps = simple_strtoul(cp+4, NULL, 0);
|
|
if (bc->cfg.bps < 1000)
|
|
bc->cfg.bps = 1000;
|
|
if (bc->cfg.bps > 1500000)
|
|
bc->cfg.bps = 1500000;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------- */
|
|
|
|
static int baycom_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
|
|
{
|
|
struct baycom_state *bc = netdev_priv(dev);
|
|
struct hdlcdrv_ioctl hi;
|
|
|
|
if (cmd != SIOCDEVPRIVATE)
|
|
return -ENOIOCTLCMD;
|
|
|
|
if (copy_from_user(&hi, ifr->ifr_data, sizeof(hi)))
|
|
return -EFAULT;
|
|
switch (hi.cmd) {
|
|
default:
|
|
return -ENOIOCTLCMD;
|
|
|
|
case HDLCDRVCTL_GETCHANNELPAR:
|
|
hi.data.cp.tx_delay = bc->ch_params.tx_delay;
|
|
hi.data.cp.tx_tail = bc->ch_params.tx_tail;
|
|
hi.data.cp.slottime = bc->ch_params.slottime;
|
|
hi.data.cp.ppersist = bc->ch_params.ppersist;
|
|
hi.data.cp.fulldup = bc->ch_params.fulldup;
|
|
break;
|
|
|
|
case HDLCDRVCTL_SETCHANNELPAR:
|
|
if (!capable(CAP_NET_ADMIN))
|
|
return -EACCES;
|
|
bc->ch_params.tx_delay = hi.data.cp.tx_delay;
|
|
bc->ch_params.tx_tail = hi.data.cp.tx_tail;
|
|
bc->ch_params.slottime = hi.data.cp.slottime;
|
|
bc->ch_params.ppersist = hi.data.cp.ppersist;
|
|
bc->ch_params.fulldup = hi.data.cp.fulldup;
|
|
bc->hdlctx.slotcnt = 1;
|
|
return 0;
|
|
|
|
case HDLCDRVCTL_GETMODEMPAR:
|
|
hi.data.mp.iobase = dev->base_addr;
|
|
hi.data.mp.irq = dev->irq;
|
|
hi.data.mp.dma = dev->dma;
|
|
hi.data.mp.dma2 = 0;
|
|
hi.data.mp.seriobase = 0;
|
|
hi.data.mp.pariobase = 0;
|
|
hi.data.mp.midiiobase = 0;
|
|
break;
|
|
|
|
case HDLCDRVCTL_SETMODEMPAR:
|
|
if ((!capable(CAP_SYS_RAWIO)) || netif_running(dev))
|
|
return -EACCES;
|
|
dev->base_addr = hi.data.mp.iobase;
|
|
dev->irq = /*hi.data.mp.irq*/0;
|
|
dev->dma = /*hi.data.mp.dma*/0;
|
|
return 0;
|
|
|
|
case HDLCDRVCTL_GETSTAT:
|
|
hi.data.cs.ptt = !!(bc->stat & EPP_PTTBIT);
|
|
hi.data.cs.dcd = !(bc->stat & EPP_DCDBIT);
|
|
hi.data.cs.ptt_keyed = bc->ptt_keyed;
|
|
hi.data.cs.tx_packets = dev->stats.tx_packets;
|
|
hi.data.cs.tx_errors = dev->stats.tx_errors;
|
|
hi.data.cs.rx_packets = dev->stats.rx_packets;
|
|
hi.data.cs.rx_errors = dev->stats.rx_errors;
|
|
break;
|
|
|
|
case HDLCDRVCTL_OLDGETSTAT:
|
|
hi.data.ocs.ptt = !!(bc->stat & EPP_PTTBIT);
|
|
hi.data.ocs.dcd = !(bc->stat & EPP_DCDBIT);
|
|
hi.data.ocs.ptt_keyed = bc->ptt_keyed;
|
|
break;
|
|
|
|
case HDLCDRVCTL_CALIBRATE:
|
|
if (!capable(CAP_SYS_RAWIO))
|
|
return -EACCES;
|
|
bc->hdlctx.calibrate = hi.data.calibrate * bc->bitrate / 8;
|
|
return 0;
|
|
|
|
case HDLCDRVCTL_DRIVERNAME:
|
|
strncpy(hi.data.drivername, "baycom_epp", sizeof(hi.data.drivername));
|
|
break;
|
|
|
|
case HDLCDRVCTL_GETMODE:
|
|
sprintf(hi.data.modename, "%sclk,%smodem,fclk=%d,bps=%d%s",
|
|
bc->cfg.intclk ? "int" : "ext",
|
|
bc->cfg.extmodem ? "ext" : "int", bc->cfg.fclk, bc->cfg.bps,
|
|
bc->cfg.loopback ? ",loopback" : "");
|
|
break;
|
|
|
|
case HDLCDRVCTL_SETMODE:
|
|
if (!capable(CAP_NET_ADMIN) || netif_running(dev))
|
|
return -EACCES;
|
|
hi.data.modename[sizeof(hi.data.modename)-1] = '\0';
|
|
return baycom_setmode(bc, hi.data.modename);
|
|
|
|
case HDLCDRVCTL_MODELIST:
|
|
strncpy(hi.data.modename, "intclk,extclk,intmodem,extmodem,divider=x",
|
|
sizeof(hi.data.modename));
|
|
break;
|
|
|
|
case HDLCDRVCTL_MODEMPARMASK:
|
|
return HDLCDRV_PARMASK_IOBASE;
|
|
|
|
}
|
|
if (copy_to_user(ifr->ifr_data, &hi, sizeof(hi)))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------- */
|
|
|
|
static const struct net_device_ops baycom_netdev_ops = {
|
|
.ndo_open = epp_open,
|
|
.ndo_stop = epp_close,
|
|
.ndo_do_ioctl = baycom_ioctl,
|
|
.ndo_start_xmit = baycom_send_packet,
|
|
.ndo_set_mac_address = baycom_set_mac_address,
|
|
};
|
|
|
|
/*
|
|
* Check for a network adaptor of this type, and return '0' if one exists.
|
|
* If dev->base_addr == 0, probe all likely locations.
|
|
* If dev->base_addr == 1, always return failure.
|
|
* If dev->base_addr == 2, allocate space for the device and return success
|
|
* (detachable devices only).
|
|
*/
|
|
static void baycom_probe(struct net_device *dev)
|
|
{
|
|
const struct hdlcdrv_channel_params dflt_ch_params = {
|
|
20, 2, 10, 40, 0
|
|
};
|
|
struct baycom_state *bc;
|
|
|
|
/*
|
|
* not a real probe! only initialize data structures
|
|
*/
|
|
bc = netdev_priv(dev);
|
|
/*
|
|
* initialize the baycom_state struct
|
|
*/
|
|
bc->ch_params = dflt_ch_params;
|
|
bc->ptt_keyed = 0;
|
|
|
|
/*
|
|
* initialize the device struct
|
|
*/
|
|
|
|
/* Fill in the fields of the device structure */
|
|
bc->skb = NULL;
|
|
|
|
dev->netdev_ops = &baycom_netdev_ops;
|
|
dev->header_ops = &ax25_header_ops;
|
|
|
|
dev->type = ARPHRD_AX25; /* AF_AX25 device */
|
|
dev->hard_header_len = AX25_MAX_HEADER_LEN + AX25_BPQ_HEADER_LEN;
|
|
dev->mtu = AX25_DEF_PACLEN; /* eth_mtu is the default */
|
|
dev->addr_len = AX25_ADDR_LEN; /* sizeof an ax.25 address */
|
|
memcpy(dev->broadcast, &ax25_bcast, AX25_ADDR_LEN);
|
|
memcpy(dev->dev_addr, &null_ax25_address, AX25_ADDR_LEN);
|
|
dev->tx_queue_len = 16;
|
|
|
|
/* New style flags */
|
|
dev->flags = 0;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------- */
|
|
|
|
/*
|
|
* command line settable parameters
|
|
*/
|
|
static const char *mode[NR_PORTS] = { "", };
|
|
static int iobase[NR_PORTS] = { 0x378, };
|
|
|
|
module_param_array(mode, charp, NULL, 0);
|
|
MODULE_PARM_DESC(mode, "baycom operating mode");
|
|
module_param_array(iobase, int, NULL, 0);
|
|
MODULE_PARM_DESC(iobase, "baycom io base address");
|
|
|
|
MODULE_AUTHOR("Thomas M. Sailer, sailer@ife.ee.ethz.ch, hb9jnx@hb9w.che.eu");
|
|
MODULE_DESCRIPTION("Baycom epp amateur radio modem driver");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
/* --------------------------------------------------------------------- */
|
|
|
|
static void __init baycom_epp_dev_setup(struct net_device *dev)
|
|
{
|
|
struct baycom_state *bc = netdev_priv(dev);
|
|
|
|
/*
|
|
* initialize part of the baycom_state struct
|
|
*/
|
|
bc->dev = dev;
|
|
bc->magic = BAYCOM_MAGIC;
|
|
bc->cfg.fclk = 19666600;
|
|
bc->cfg.bps = 9600;
|
|
/*
|
|
* initialize part of the device struct
|
|
*/
|
|
baycom_probe(dev);
|
|
}
|
|
|
|
static int __init init_baycomepp(void)
|
|
{
|
|
int i, found = 0;
|
|
char set_hw = 1;
|
|
|
|
printk(bc_drvinfo);
|
|
/*
|
|
* register net devices
|
|
*/
|
|
for (i = 0; i < NR_PORTS; i++) {
|
|
struct net_device *dev;
|
|
|
|
dev = alloc_netdev(sizeof(struct baycom_state), "bce%d",
|
|
baycom_epp_dev_setup);
|
|
|
|
if (!dev) {
|
|
printk(KERN_WARNING "bce%d : out of memory\n", i);
|
|
return found ? 0 : -ENOMEM;
|
|
}
|
|
|
|
sprintf(dev->name, "bce%d", i);
|
|
dev->base_addr = iobase[i];
|
|
|
|
if (!mode[i])
|
|
set_hw = 0;
|
|
if (!set_hw)
|
|
iobase[i] = 0;
|
|
|
|
if (register_netdev(dev)) {
|
|
printk(KERN_WARNING "%s: cannot register net device %s\n", bc_drvname, dev->name);
|
|
free_netdev(dev);
|
|
break;
|
|
}
|
|
if (set_hw && baycom_setmode(netdev_priv(dev), mode[i]))
|
|
set_hw = 0;
|
|
baycom_device[i] = dev;
|
|
found++;
|
|
}
|
|
|
|
return found ? 0 : -ENXIO;
|
|
}
|
|
|
|
static void __exit cleanup_baycomepp(void)
|
|
{
|
|
int i;
|
|
|
|
for(i = 0; i < NR_PORTS; i++) {
|
|
struct net_device *dev = baycom_device[i];
|
|
|
|
if (dev) {
|
|
struct baycom_state *bc = netdev_priv(dev);
|
|
if (bc->magic == BAYCOM_MAGIC) {
|
|
unregister_netdev(dev);
|
|
free_netdev(dev);
|
|
} else
|
|
printk(paranoia_str, "cleanup_module");
|
|
}
|
|
}
|
|
}
|
|
|
|
module_init(init_baycomepp);
|
|
module_exit(cleanup_baycomepp);
|
|
|
|
/* --------------------------------------------------------------------- */
|
|
|
|
#ifndef MODULE
|
|
|
|
/*
|
|
* format: baycom_epp=io,mode
|
|
* mode: fpga config options
|
|
*/
|
|
|
|
static int __init baycom_epp_setup(char *str)
|
|
{
|
|
static unsigned __initdata nr_dev = 0;
|
|
int ints[2];
|
|
|
|
if (nr_dev >= NR_PORTS)
|
|
return 0;
|
|
str = get_options(str, 2, ints);
|
|
if (ints[0] < 1)
|
|
return 0;
|
|
mode[nr_dev] = str;
|
|
iobase[nr_dev] = ints[1];
|
|
nr_dev++;
|
|
return 1;
|
|
}
|
|
|
|
__setup("baycom_epp=", baycom_epp_setup);
|
|
|
|
#endif /* MODULE */
|
|
/* --------------------------------------------------------------------- */
|