1192 lines
31 KiB
C
1192 lines
31 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*****************************************************************************/
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/*
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* yam.c -- YAM radio modem driver.
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*
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* Copyright (C) 1998 Frederic Rible F1OAT (frible@teaser.fr)
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* Adapted from baycom.c driver written by Thomas Sailer (sailer@ife.ee.ethz.ch)
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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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* History:
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* 0.0 F1OAT 06.06.98 Begin of work with baycom.c source code V 0.3
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* 0.1 F1OAT 07.06.98 Add timer polling routine for channel arbitration
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* 0.2 F6FBB 08.06.98 Added delay after FPGA programming
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* 0.3 F6FBB 29.07.98 Delayed PTT implementation for dupmode=2
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* 0.4 F6FBB 30.07.98 Added TxTail, Slottime and Persistence
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* 0.5 F6FBB 01.08.98 Shared IRQs, /proc/net and network statistics
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* 0.6 F6FBB 25.08.98 Added 1200Bds format
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* 0.7 F6FBB 12.09.98 Added to the kernel configuration
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* 0.8 F6FBB 14.10.98 Fixed slottime/persistence timing bug
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* OK1ZIA 2.09.01 Fixed "kfree_skb on hard IRQ"
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* using dev_kfree_skb_any(). (important in 2.4 kernel)
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*/
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/*****************************************************************************/
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/net.h>
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#include <linux/in.h>
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#include <linux/if.h>
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#include <linux/slab.h>
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#include <linux/errno.h>
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#include <linux/bitops.h>
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#include <linux/random.h>
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#include <asm/io.h>
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#include <linux/interrupt.h>
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#include <linux/ioport.h>
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#include <linux/firmware.h>
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#include <linux/platform_device.h>
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#include <linux/netdevice.h>
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#include <linux/if_arp.h>
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#include <linux/etherdevice.h>
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#include <linux/skbuff.h>
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#include <net/ax25.h>
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#include <linux/kernel.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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#include <net/net_namespace.h>
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#include <linux/uaccess.h>
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#include <linux/init.h>
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#include <linux/yam.h>
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/* --------------------------------------------------------------------- */
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static const char yam_drvname[] = "yam";
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static const char yam_drvinfo[] __initconst = KERN_INFO \
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"YAM driver version 0.8 by F1OAT/F6FBB\n";
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/* --------------------------------------------------------------------- */
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#define FIRMWARE_9600 "yam/9600.bin"
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#define FIRMWARE_1200 "yam/1200.bin"
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#define YAM_9600 1
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#define YAM_1200 2
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#define NR_PORTS 4
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#define YAM_MAGIC 0xF10A7654
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/* Transmitter states */
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#define TX_OFF 0
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#define TX_HEAD 1
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#define TX_DATA 2
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#define TX_CRC1 3
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#define TX_CRC2 4
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#define TX_TAIL 5
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#define YAM_MAX_FRAME 1024
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#define DEFAULT_BITRATE 9600 /* bps */
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#define DEFAULT_HOLDD 10 /* sec */
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#define DEFAULT_TXD 300 /* ms */
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#define DEFAULT_TXTAIL 10 /* ms */
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#define DEFAULT_SLOT 100 /* ms */
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#define DEFAULT_PERS 64 /* 0->255 */
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struct yam_port {
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int magic;
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int bitrate;
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int baudrate;
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int iobase;
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int irq;
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int dupmode;
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struct net_device *dev;
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int nb_rxint;
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int nb_mdint;
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/* Parameters section */
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int txd; /* tx delay */
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int holdd; /* duplex ptt delay */
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int txtail; /* txtail delay */
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int slot; /* slottime */
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int pers; /* persistence */
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/* Tx section */
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int tx_state;
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int tx_count;
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int slotcnt;
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unsigned char tx_buf[YAM_MAX_FRAME];
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int tx_len;
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int tx_crcl, tx_crch;
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struct sk_buff_head send_queue; /* Packets awaiting transmission */
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/* Rx section */
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int dcd;
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unsigned char rx_buf[YAM_MAX_FRAME];
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int rx_len;
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int rx_crcl, rx_crch;
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};
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struct yam_mcs {
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unsigned char bits[YAM_FPGA_SIZE];
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int bitrate;
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struct yam_mcs *next;
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};
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static struct net_device *yam_devs[NR_PORTS];
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static struct yam_mcs *yam_data;
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static DEFINE_TIMER(yam_timer, NULL);
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/* --------------------------------------------------------------------- */
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#define RBR(iobase) (iobase+0)
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#define THR(iobase) (iobase+0)
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#define IER(iobase) (iobase+1)
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#define IIR(iobase) (iobase+2)
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#define FCR(iobase) (iobase+2)
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#define LCR(iobase) (iobase+3)
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#define MCR(iobase) (iobase+4)
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#define LSR(iobase) (iobase+5)
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#define MSR(iobase) (iobase+6)
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#define SCR(iobase) (iobase+7)
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#define DLL(iobase) (iobase+0)
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#define DLM(iobase) (iobase+1)
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#define YAM_EXTENT 8
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/* Interrupt Identification Register Bit Masks */
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#define IIR_NOPEND 1
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#define IIR_MSR 0
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#define IIR_TX 2
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#define IIR_RX 4
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#define IIR_LSR 6
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#define IIR_TIMEOUT 12 /* Fifo mode only */
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#define IIR_MASK 0x0F
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/* Interrupt Enable Register Bit Masks */
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#define IER_RX 1 /* enable rx interrupt */
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#define IER_TX 2 /* enable tx interrupt */
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#define IER_LSR 4 /* enable line status interrupts */
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#define IER_MSR 8 /* enable modem status interrupts */
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/* Modem Control Register Bit Masks */
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#define MCR_DTR 0x01 /* DTR output */
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#define MCR_RTS 0x02 /* RTS output */
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#define MCR_OUT1 0x04 /* OUT1 output (not accessible in RS232) */
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#define MCR_OUT2 0x08 /* Master Interrupt enable (must be set on PCs) */
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#define MCR_LOOP 0x10 /* Loopback enable */
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/* Modem Status Register Bit Masks */
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#define MSR_DCTS 0x01 /* Delta CTS input */
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#define MSR_DDSR 0x02 /* Delta DSR */
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#define MSR_DRIN 0x04 /* Delta RI */
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#define MSR_DDCD 0x08 /* Delta DCD */
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#define MSR_CTS 0x10 /* CTS input */
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#define MSR_DSR 0x20 /* DSR input */
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#define MSR_RING 0x40 /* RI input */
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#define MSR_DCD 0x80 /* DCD input */
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/* line status register bit mask */
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#define LSR_RXC 0x01
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#define LSR_OE 0x02
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#define LSR_PE 0x04
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#define LSR_FE 0x08
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#define LSR_BREAK 0x10
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#define LSR_THRE 0x20
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#define LSR_TSRE 0x40
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/* Line Control Register Bit Masks */
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#define LCR_DLAB 0x80
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#define LCR_BREAK 0x40
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#define LCR_PZERO 0x28
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#define LCR_PEVEN 0x18
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#define LCR_PODD 0x08
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#define LCR_STOP1 0x00
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#define LCR_STOP2 0x04
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#define LCR_BIT5 0x00
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#define LCR_BIT6 0x02
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#define LCR_BIT7 0x01
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#define LCR_BIT8 0x03
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/* YAM Modem <-> UART Port mapping */
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#define TX_RDY MSR_DCTS /* transmitter ready to send */
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#define RX_DCD MSR_DCD /* carrier detect */
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#define RX_FLAG MSR_RING /* hdlc flag received */
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#define FPGA_DONE MSR_DSR /* FPGA is configured */
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#define PTT_ON (MCR_RTS|MCR_OUT2) /* activate PTT */
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#define PTT_OFF (MCR_DTR|MCR_OUT2) /* release PTT */
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#define ENABLE_RXINT IER_RX /* enable uart rx interrupt during rx */
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#define ENABLE_TXINT IER_MSR /* enable uart ms interrupt during tx */
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#define ENABLE_RTXINT (IER_RX|IER_MSR) /* full duplex operations */
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/*************************************************************************
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* CRC Tables
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************************************************************************/
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static const unsigned char chktabl[256] =
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{0x00, 0x89, 0x12, 0x9b, 0x24, 0xad, 0x36, 0xbf, 0x48, 0xc1, 0x5a, 0xd3, 0x6c, 0xe5, 0x7e,
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0xf7, 0x81, 0x08, 0x93, 0x1a, 0xa5, 0x2c, 0xb7, 0x3e, 0xc9, 0x40, 0xdb, 0x52, 0xed, 0x64,
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0xff, 0x76, 0x02, 0x8b, 0x10, 0x99, 0x26, 0xaf, 0x34, 0xbd, 0x4a, 0xc3, 0x58, 0xd1, 0x6e,
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0xe7, 0x7c, 0xf5, 0x83, 0x0a, 0x91, 0x18, 0xa7, 0x2e, 0xb5, 0x3c, 0xcb, 0x42, 0xd9, 0x50,
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0xef, 0x66, 0xfd, 0x74, 0x04, 0x8d, 0x16, 0x9f, 0x20, 0xa9, 0x32, 0xbb, 0x4c, 0xc5, 0x5e,
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0xd7, 0x68, 0xe1, 0x7a, 0xf3, 0x85, 0x0c, 0x97, 0x1e, 0xa1, 0x28, 0xb3, 0x3a, 0xcd, 0x44,
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0xdf, 0x56, 0xe9, 0x60, 0xfb, 0x72, 0x06, 0x8f, 0x14, 0x9d, 0x22, 0xab, 0x30, 0xb9, 0x4e,
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0xc7, 0x5c, 0xd5, 0x6a, 0xe3, 0x78, 0xf1, 0x87, 0x0e, 0x95, 0x1c, 0xa3, 0x2a, 0xb1, 0x38,
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0xcf, 0x46, 0xdd, 0x54, 0xeb, 0x62, 0xf9, 0x70, 0x08, 0x81, 0x1a, 0x93, 0x2c, 0xa5, 0x3e,
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0xb7, 0x40, 0xc9, 0x52, 0xdb, 0x64, 0xed, 0x76, 0xff, 0x89, 0x00, 0x9b, 0x12, 0xad, 0x24,
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0xbf, 0x36, 0xc1, 0x48, 0xd3, 0x5a, 0xe5, 0x6c, 0xf7, 0x7e, 0x0a, 0x83, 0x18, 0x91, 0x2e,
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0xa7, 0x3c, 0xb5, 0x42, 0xcb, 0x50, 0xd9, 0x66, 0xef, 0x74, 0xfd, 0x8b, 0x02, 0x99, 0x10,
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0xaf, 0x26, 0xbd, 0x34, 0xc3, 0x4a, 0xd1, 0x58, 0xe7, 0x6e, 0xf5, 0x7c, 0x0c, 0x85, 0x1e,
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0x97, 0x28, 0xa1, 0x3a, 0xb3, 0x44, 0xcd, 0x56, 0xdf, 0x60, 0xe9, 0x72, 0xfb, 0x8d, 0x04,
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0x9f, 0x16, 0xa9, 0x20, 0xbb, 0x32, 0xc5, 0x4c, 0xd7, 0x5e, 0xe1, 0x68, 0xf3, 0x7a, 0x0e,
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0x87, 0x1c, 0x95, 0x2a, 0xa3, 0x38, 0xb1, 0x46, 0xcf, 0x54, 0xdd, 0x62, 0xeb, 0x70, 0xf9,
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0x8f, 0x06, 0x9d, 0x14, 0xab, 0x22, 0xb9, 0x30, 0xc7, 0x4e, 0xd5, 0x5c, 0xe3, 0x6a, 0xf1,
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0x78};
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static const unsigned char chktabh[256] =
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{0x00, 0x11, 0x23, 0x32, 0x46, 0x57, 0x65, 0x74, 0x8c, 0x9d, 0xaf, 0xbe, 0xca, 0xdb, 0xe9,
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0xf8, 0x10, 0x01, 0x33, 0x22, 0x56, 0x47, 0x75, 0x64, 0x9c, 0x8d, 0xbf, 0xae, 0xda, 0xcb,
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0xf9, 0xe8, 0x21, 0x30, 0x02, 0x13, 0x67, 0x76, 0x44, 0x55, 0xad, 0xbc, 0x8e, 0x9f, 0xeb,
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0xfa, 0xc8, 0xd9, 0x31, 0x20, 0x12, 0x03, 0x77, 0x66, 0x54, 0x45, 0xbd, 0xac, 0x9e, 0x8f,
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0xfb, 0xea, 0xd8, 0xc9, 0x42, 0x53, 0x61, 0x70, 0x04, 0x15, 0x27, 0x36, 0xce, 0xdf, 0xed,
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0xfc, 0x88, 0x99, 0xab, 0xba, 0x52, 0x43, 0x71, 0x60, 0x14, 0x05, 0x37, 0x26, 0xde, 0xcf,
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0xfd, 0xec, 0x98, 0x89, 0xbb, 0xaa, 0x63, 0x72, 0x40, 0x51, 0x25, 0x34, 0x06, 0x17, 0xef,
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0xfe, 0xcc, 0xdd, 0xa9, 0xb8, 0x8a, 0x9b, 0x73, 0x62, 0x50, 0x41, 0x35, 0x24, 0x16, 0x07,
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0xff, 0xee, 0xdc, 0xcd, 0xb9, 0xa8, 0x9a, 0x8b, 0x84, 0x95, 0xa7, 0xb6, 0xc2, 0xd3, 0xe1,
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0xf0, 0x08, 0x19, 0x2b, 0x3a, 0x4e, 0x5f, 0x6d, 0x7c, 0x94, 0x85, 0xb7, 0xa6, 0xd2, 0xc3,
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0xf1, 0xe0, 0x18, 0x09, 0x3b, 0x2a, 0x5e, 0x4f, 0x7d, 0x6c, 0xa5, 0xb4, 0x86, 0x97, 0xe3,
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0xf2, 0xc0, 0xd1, 0x29, 0x38, 0x0a, 0x1b, 0x6f, 0x7e, 0x4c, 0x5d, 0xb5, 0xa4, 0x96, 0x87,
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0xf3, 0xe2, 0xd0, 0xc1, 0x39, 0x28, 0x1a, 0x0b, 0x7f, 0x6e, 0x5c, 0x4d, 0xc6, 0xd7, 0xe5,
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0xf4, 0x80, 0x91, 0xa3, 0xb2, 0x4a, 0x5b, 0x69, 0x78, 0x0c, 0x1d, 0x2f, 0x3e, 0xd6, 0xc7,
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0xf5, 0xe4, 0x90, 0x81, 0xb3, 0xa2, 0x5a, 0x4b, 0x79, 0x68, 0x1c, 0x0d, 0x3f, 0x2e, 0xe7,
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0xf6, 0xc4, 0xd5, 0xa1, 0xb0, 0x82, 0x93, 0x6b, 0x7a, 0x48, 0x59, 0x2d, 0x3c, 0x0e, 0x1f,
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0xf7, 0xe6, 0xd4, 0xc5, 0xb1, 0xa0, 0x92, 0x83, 0x7b, 0x6a, 0x58, 0x49, 0x3d, 0x2c, 0x1e,
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0x0f};
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/*************************************************************************
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* FPGA functions
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************************************************************************/
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static void delay(int ms)
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{
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unsigned long timeout = jiffies + ((ms * HZ) / 1000);
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while (time_before(jiffies, timeout))
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cpu_relax();
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}
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/*
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* reset FPGA
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*/
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static void fpga_reset(int iobase)
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{
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outb(0, IER(iobase));
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outb(LCR_DLAB | LCR_BIT5, LCR(iobase));
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outb(1, DLL(iobase));
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outb(0, DLM(iobase));
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outb(LCR_BIT5, LCR(iobase));
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inb(LSR(iobase));
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inb(MSR(iobase));
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/* turn off FPGA supply voltage */
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outb(MCR_OUT1 | MCR_OUT2, MCR(iobase));
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delay(100);
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/* turn on FPGA supply voltage again */
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outb(MCR_DTR | MCR_RTS | MCR_OUT1 | MCR_OUT2, MCR(iobase));
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delay(100);
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}
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/*
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* send one byte to FPGA
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*/
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static int fpga_write(int iobase, unsigned char wrd)
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{
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unsigned char bit;
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int k;
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unsigned long timeout = jiffies + HZ / 10;
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for (k = 0; k < 8; k++) {
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bit = (wrd & 0x80) ? (MCR_RTS | MCR_DTR) : MCR_DTR;
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outb(bit | MCR_OUT1 | MCR_OUT2, MCR(iobase));
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wrd <<= 1;
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outb(0xfc, THR(iobase));
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while ((inb(LSR(iobase)) & LSR_TSRE) == 0)
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if (time_after(jiffies, timeout))
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return -1;
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}
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return 0;
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}
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/*
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* predef should be 0 for loading user defined mcs
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* predef should be YAM_1200 for loading predef 1200 mcs
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* predef should be YAM_9600 for loading predef 9600 mcs
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*/
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static unsigned char *add_mcs(unsigned char *bits, int bitrate,
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unsigned int predef)
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{
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const char *fw_name[2] = {FIRMWARE_9600, FIRMWARE_1200};
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const struct firmware *fw;
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struct platform_device *pdev;
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struct yam_mcs *p;
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int err;
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switch (predef) {
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case 0:
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fw = NULL;
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break;
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case YAM_1200:
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case YAM_9600:
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predef--;
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pdev = platform_device_register_simple("yam", 0, NULL, 0);
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if (IS_ERR(pdev)) {
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printk(KERN_ERR "yam: Failed to register firmware\n");
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return NULL;
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}
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err = request_firmware(&fw, fw_name[predef], &pdev->dev);
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platform_device_unregister(pdev);
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if (err) {
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printk(KERN_ERR "Failed to load firmware \"%s\"\n",
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fw_name[predef]);
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return NULL;
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}
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if (fw->size != YAM_FPGA_SIZE) {
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printk(KERN_ERR "Bogus length %zu in firmware \"%s\"\n",
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fw->size, fw_name[predef]);
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release_firmware(fw);
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return NULL;
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}
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bits = (unsigned char *)fw->data;
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break;
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default:
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printk(KERN_ERR "yam: Invalid predef number %u\n", predef);
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return NULL;
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}
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/* If it already exists, replace the bit data */
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p = yam_data;
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while (p) {
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if (p->bitrate == bitrate) {
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memcpy(p->bits, bits, YAM_FPGA_SIZE);
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goto out;
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}
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p = p->next;
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}
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/* Allocate a new mcs */
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|
if ((p = kmalloc(sizeof(struct yam_mcs), GFP_KERNEL)) == NULL) {
|
|
release_firmware(fw);
|
|
return NULL;
|
|
}
|
|
memcpy(p->bits, bits, YAM_FPGA_SIZE);
|
|
p->bitrate = bitrate;
|
|
p->next = yam_data;
|
|
yam_data = p;
|
|
out:
|
|
release_firmware(fw);
|
|
return p->bits;
|
|
}
|
|
|
|
static unsigned char *get_mcs(int bitrate)
|
|
{
|
|
struct yam_mcs *p;
|
|
|
|
p = yam_data;
|
|
while (p) {
|
|
if (p->bitrate == bitrate)
|
|
return p->bits;
|
|
p = p->next;
|
|
}
|
|
|
|
/* Load predefined mcs data */
|
|
switch (bitrate) {
|
|
case 1200:
|
|
/* setting predef as YAM_1200 for loading predef 1200 mcs */
|
|
return add_mcs(NULL, bitrate, YAM_1200);
|
|
default:
|
|
/* setting predef as YAM_9600 for loading predef 9600 mcs */
|
|
return add_mcs(NULL, bitrate, YAM_9600);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* download bitstream to FPGA
|
|
* data is contained in bits[] array in yam1200.h resp. yam9600.h
|
|
*/
|
|
|
|
static int fpga_download(int iobase, int bitrate)
|
|
{
|
|
int i, rc;
|
|
unsigned char *pbits;
|
|
|
|
pbits = get_mcs(bitrate);
|
|
if (pbits == NULL)
|
|
return -1;
|
|
|
|
fpga_reset(iobase);
|
|
for (i = 0; i < YAM_FPGA_SIZE; i++) {
|
|
if (fpga_write(iobase, pbits[i])) {
|
|
printk(KERN_ERR "yam: error in write cycle\n");
|
|
return -1; /* write... */
|
|
}
|
|
}
|
|
|
|
fpga_write(iobase, 0xFF);
|
|
rc = inb(MSR(iobase)); /* check DONE signal */
|
|
|
|
/* Needed for some hardwares */
|
|
delay(50);
|
|
|
|
return (rc & MSR_DSR) ? 0 : -1;
|
|
}
|
|
|
|
|
|
/************************************************************************
|
|
* Serial port init
|
|
************************************************************************/
|
|
|
|
static void yam_set_uart(struct net_device *dev)
|
|
{
|
|
struct yam_port *yp = netdev_priv(dev);
|
|
int divisor = 115200 / yp->baudrate;
|
|
|
|
outb(0, IER(dev->base_addr));
|
|
outb(LCR_DLAB | LCR_BIT8, LCR(dev->base_addr));
|
|
outb(divisor, DLL(dev->base_addr));
|
|
outb(0, DLM(dev->base_addr));
|
|
outb(LCR_BIT8, LCR(dev->base_addr));
|
|
outb(PTT_OFF, MCR(dev->base_addr));
|
|
outb(0x00, FCR(dev->base_addr));
|
|
|
|
/* Flush pending irq */
|
|
|
|
inb(RBR(dev->base_addr));
|
|
inb(MSR(dev->base_addr));
|
|
|
|
/* Enable rx irq */
|
|
|
|
outb(ENABLE_RTXINT, IER(dev->base_addr));
|
|
}
|
|
|
|
|
|
/* --------------------------------------------------------------------- */
|
|
|
|
enum uart {
|
|
c_uart_unknown, c_uart_8250,
|
|
c_uart_16450, c_uart_16550, c_uart_16550A
|
|
};
|
|
|
|
static const char *uart_str[] =
|
|
{"unknown", "8250", "16450", "16550", "16550A"};
|
|
|
|
static enum uart yam_check_uart(unsigned int iobase)
|
|
{
|
|
unsigned char b1, b2, b3;
|
|
enum uart u;
|
|
enum uart uart_tab[] =
|
|
{c_uart_16450, c_uart_unknown, c_uart_16550, c_uart_16550A};
|
|
|
|
b1 = inb(MCR(iobase));
|
|
outb(b1 | 0x10, MCR(iobase)); /* loopback mode */
|
|
b2 = inb(MSR(iobase));
|
|
outb(0x1a, MCR(iobase));
|
|
b3 = inb(MSR(iobase)) & 0xf0;
|
|
outb(b1, MCR(iobase)); /* restore old values */
|
|
outb(b2, MSR(iobase));
|
|
if (b3 != 0x90)
|
|
return c_uart_unknown;
|
|
inb(RBR(iobase));
|
|
inb(RBR(iobase));
|
|
outb(0x01, FCR(iobase)); /* enable FIFOs */
|
|
u = uart_tab[(inb(IIR(iobase)) >> 6) & 3];
|
|
if (u == c_uart_16450) {
|
|
outb(0x5a, SCR(iobase));
|
|
b1 = inb(SCR(iobase));
|
|
outb(0xa5, SCR(iobase));
|
|
b2 = inb(SCR(iobase));
|
|
if ((b1 != 0x5a) || (b2 != 0xa5))
|
|
u = c_uart_8250;
|
|
}
|
|
return u;
|
|
}
|
|
|
|
/******************************************************************************
|
|
* Rx Section
|
|
******************************************************************************/
|
|
static inline void yam_rx_flag(struct net_device *dev, struct yam_port *yp)
|
|
{
|
|
if (yp->dcd && yp->rx_len >= 3 && yp->rx_len < YAM_MAX_FRAME) {
|
|
int pkt_len = yp->rx_len - 2 + 1; /* -CRC + kiss */
|
|
struct sk_buff *skb;
|
|
|
|
if ((yp->rx_crch & yp->rx_crcl) != 0xFF) {
|
|
/* Bad crc */
|
|
} else {
|
|
if (!(skb = dev_alloc_skb(pkt_len))) {
|
|
printk(KERN_WARNING "%s: memory squeeze, dropping packet\n", dev->name);
|
|
++dev->stats.rx_dropped;
|
|
} else {
|
|
unsigned char *cp;
|
|
cp = skb_put(skb, pkt_len);
|
|
*cp++ = 0; /* KISS kludge */
|
|
memcpy(cp, yp->rx_buf, pkt_len - 1);
|
|
skb->protocol = ax25_type_trans(skb, dev);
|
|
netif_rx(skb);
|
|
++dev->stats.rx_packets;
|
|
}
|
|
}
|
|
}
|
|
yp->rx_len = 0;
|
|
yp->rx_crcl = 0x21;
|
|
yp->rx_crch = 0xf3;
|
|
}
|
|
|
|
static inline void yam_rx_byte(struct net_device *dev, struct yam_port *yp, unsigned char rxb)
|
|
{
|
|
if (yp->rx_len < YAM_MAX_FRAME) {
|
|
unsigned char c = yp->rx_crcl;
|
|
yp->rx_crcl = (chktabl[c] ^ yp->rx_crch);
|
|
yp->rx_crch = (chktabh[c] ^ rxb);
|
|
yp->rx_buf[yp->rx_len++] = rxb;
|
|
}
|
|
}
|
|
|
|
/********************************************************************************
|
|
* TX Section
|
|
********************************************************************************/
|
|
|
|
static void ptt_on(struct net_device *dev)
|
|
{
|
|
outb(PTT_ON, MCR(dev->base_addr));
|
|
}
|
|
|
|
static void ptt_off(struct net_device *dev)
|
|
{
|
|
outb(PTT_OFF, MCR(dev->base_addr));
|
|
}
|
|
|
|
static netdev_tx_t yam_send_packet(struct sk_buff *skb,
|
|
struct net_device *dev)
|
|
{
|
|
struct yam_port *yp = netdev_priv(dev);
|
|
|
|
if (skb->protocol == htons(ETH_P_IP))
|
|
return ax25_ip_xmit(skb);
|
|
|
|
skb_queue_tail(&yp->send_queue, skb);
|
|
netif_trans_update(dev);
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
static void yam_start_tx(struct net_device *dev, struct yam_port *yp)
|
|
{
|
|
if ((yp->tx_state == TX_TAIL) || (yp->txd == 0))
|
|
yp->tx_count = 1;
|
|
else
|
|
yp->tx_count = (yp->bitrate * yp->txd) / 8000;
|
|
yp->tx_state = TX_HEAD;
|
|
ptt_on(dev);
|
|
}
|
|
|
|
static void yam_arbitrate(struct net_device *dev)
|
|
{
|
|
struct yam_port *yp = netdev_priv(dev);
|
|
|
|
if (yp->magic != YAM_MAGIC || yp->tx_state != TX_OFF ||
|
|
skb_queue_empty(&yp->send_queue))
|
|
return;
|
|
/* tx_state is TX_OFF and there is data to send */
|
|
|
|
if (yp->dupmode) {
|
|
/* Full duplex mode, don't wait */
|
|
yam_start_tx(dev, yp);
|
|
return;
|
|
}
|
|
if (yp->dcd) {
|
|
/* DCD on, wait slotime ... */
|
|
yp->slotcnt = yp->slot / 10;
|
|
return;
|
|
}
|
|
/* Is slottime passed ? */
|
|
if ((--yp->slotcnt) > 0)
|
|
return;
|
|
|
|
yp->slotcnt = yp->slot / 10;
|
|
|
|
/* is random > persist ? */
|
|
if (get_random_u8() > yp->pers)
|
|
return;
|
|
|
|
yam_start_tx(dev, yp);
|
|
}
|
|
|
|
static void yam_dotimer(struct timer_list *unused)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < NR_PORTS; i++) {
|
|
struct net_device *dev = yam_devs[i];
|
|
if (dev && netif_running(dev))
|
|
yam_arbitrate(dev);
|
|
}
|
|
yam_timer.expires = jiffies + HZ / 100;
|
|
add_timer(&yam_timer);
|
|
}
|
|
|
|
static void yam_tx_byte(struct net_device *dev, struct yam_port *yp)
|
|
{
|
|
struct sk_buff *skb;
|
|
unsigned char b, temp;
|
|
|
|
switch (yp->tx_state) {
|
|
case TX_OFF:
|
|
break;
|
|
case TX_HEAD:
|
|
if (--yp->tx_count <= 0) {
|
|
if (!(skb = skb_dequeue(&yp->send_queue))) {
|
|
ptt_off(dev);
|
|
yp->tx_state = TX_OFF;
|
|
break;
|
|
}
|
|
yp->tx_state = TX_DATA;
|
|
if (skb->data[0] != 0) {
|
|
/* do_kiss_params(s, skb->data, skb->len); */
|
|
dev_kfree_skb_any(skb);
|
|
break;
|
|
}
|
|
yp->tx_len = skb->len - 1; /* strip KISS byte */
|
|
if (yp->tx_len >= YAM_MAX_FRAME || yp->tx_len < 2) {
|
|
dev_kfree_skb_any(skb);
|
|
break;
|
|
}
|
|
skb_copy_from_linear_data_offset(skb, 1,
|
|
yp->tx_buf,
|
|
yp->tx_len);
|
|
dev_kfree_skb_any(skb);
|
|
yp->tx_count = 0;
|
|
yp->tx_crcl = 0x21;
|
|
yp->tx_crch = 0xf3;
|
|
yp->tx_state = TX_DATA;
|
|
}
|
|
break;
|
|
case TX_DATA:
|
|
b = yp->tx_buf[yp->tx_count++];
|
|
outb(b, THR(dev->base_addr));
|
|
temp = yp->tx_crcl;
|
|
yp->tx_crcl = chktabl[temp] ^ yp->tx_crch;
|
|
yp->tx_crch = chktabh[temp] ^ b;
|
|
if (yp->tx_count >= yp->tx_len) {
|
|
yp->tx_state = TX_CRC1;
|
|
}
|
|
break;
|
|
case TX_CRC1:
|
|
yp->tx_crch = chktabl[yp->tx_crcl] ^ yp->tx_crch;
|
|
yp->tx_crcl = chktabh[yp->tx_crcl] ^ chktabl[yp->tx_crch] ^ 0xff;
|
|
outb(yp->tx_crcl, THR(dev->base_addr));
|
|
yp->tx_state = TX_CRC2;
|
|
break;
|
|
case TX_CRC2:
|
|
outb(chktabh[yp->tx_crch] ^ 0xFF, THR(dev->base_addr));
|
|
if (skb_queue_empty(&yp->send_queue)) {
|
|
yp->tx_count = (yp->bitrate * yp->txtail) / 8000;
|
|
if (yp->dupmode == 2)
|
|
yp->tx_count += (yp->bitrate * yp->holdd) / 8;
|
|
if (yp->tx_count == 0)
|
|
yp->tx_count = 1;
|
|
yp->tx_state = TX_TAIL;
|
|
} else {
|
|
yp->tx_count = 1;
|
|
yp->tx_state = TX_HEAD;
|
|
}
|
|
++dev->stats.tx_packets;
|
|
break;
|
|
case TX_TAIL:
|
|
if (--yp->tx_count <= 0) {
|
|
yp->tx_state = TX_OFF;
|
|
ptt_off(dev);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
/***********************************************************************************
|
|
* ISR routine
|
|
************************************************************************************/
|
|
|
|
static irqreturn_t yam_interrupt(int irq, void *dev_id)
|
|
{
|
|
struct net_device *dev;
|
|
struct yam_port *yp;
|
|
unsigned char iir;
|
|
int counter = 100;
|
|
int i;
|
|
int handled = 0;
|
|
|
|
for (i = 0; i < NR_PORTS; i++) {
|
|
dev = yam_devs[i];
|
|
yp = netdev_priv(dev);
|
|
|
|
if (!netif_running(dev))
|
|
continue;
|
|
|
|
while ((iir = IIR_MASK & inb(IIR(dev->base_addr))) != IIR_NOPEND) {
|
|
unsigned char msr = inb(MSR(dev->base_addr));
|
|
unsigned char lsr = inb(LSR(dev->base_addr));
|
|
unsigned char rxb;
|
|
|
|
handled = 1;
|
|
|
|
if (lsr & LSR_OE)
|
|
++dev->stats.rx_fifo_errors;
|
|
|
|
yp->dcd = (msr & RX_DCD) ? 1 : 0;
|
|
|
|
if (--counter <= 0) {
|
|
printk(KERN_ERR "%s: too many irq iir=%d\n",
|
|
dev->name, iir);
|
|
goto out;
|
|
}
|
|
if (msr & TX_RDY) {
|
|
++yp->nb_mdint;
|
|
yam_tx_byte(dev, yp);
|
|
}
|
|
if (lsr & LSR_RXC) {
|
|
++yp->nb_rxint;
|
|
rxb = inb(RBR(dev->base_addr));
|
|
if (msr & RX_FLAG)
|
|
yam_rx_flag(dev, yp);
|
|
else
|
|
yam_rx_byte(dev, yp, rxb);
|
|
}
|
|
}
|
|
}
|
|
out:
|
|
return IRQ_RETVAL(handled);
|
|
}
|
|
|
|
#ifdef CONFIG_PROC_FS
|
|
|
|
static void *yam_seq_start(struct seq_file *seq, loff_t *pos)
|
|
{
|
|
return (*pos < NR_PORTS) ? yam_devs[*pos] : NULL;
|
|
}
|
|
|
|
static void *yam_seq_next(struct seq_file *seq, void *v, loff_t *pos)
|
|
{
|
|
++*pos;
|
|
return (*pos < NR_PORTS) ? yam_devs[*pos] : NULL;
|
|
}
|
|
|
|
static void yam_seq_stop(struct seq_file *seq, void *v)
|
|
{
|
|
}
|
|
|
|
static int yam_seq_show(struct seq_file *seq, void *v)
|
|
{
|
|
struct net_device *dev = v;
|
|
const struct yam_port *yp = netdev_priv(dev);
|
|
|
|
seq_printf(seq, "Device %s\n", dev->name);
|
|
seq_printf(seq, " Up %d\n", netif_running(dev));
|
|
seq_printf(seq, " Speed %u\n", yp->bitrate);
|
|
seq_printf(seq, " IoBase 0x%x\n", yp->iobase);
|
|
seq_printf(seq, " BaudRate %u\n", yp->baudrate);
|
|
seq_printf(seq, " IRQ %u\n", yp->irq);
|
|
seq_printf(seq, " TxState %u\n", yp->tx_state);
|
|
seq_printf(seq, " Duplex %u\n", yp->dupmode);
|
|
seq_printf(seq, " HoldDly %u\n", yp->holdd);
|
|
seq_printf(seq, " TxDelay %u\n", yp->txd);
|
|
seq_printf(seq, " TxTail %u\n", yp->txtail);
|
|
seq_printf(seq, " SlotTime %u\n", yp->slot);
|
|
seq_printf(seq, " Persist %u\n", yp->pers);
|
|
seq_printf(seq, " TxFrames %lu\n", dev->stats.tx_packets);
|
|
seq_printf(seq, " RxFrames %lu\n", dev->stats.rx_packets);
|
|
seq_printf(seq, " TxInt %u\n", yp->nb_mdint);
|
|
seq_printf(seq, " RxInt %u\n", yp->nb_rxint);
|
|
seq_printf(seq, " RxOver %lu\n", dev->stats.rx_fifo_errors);
|
|
seq_printf(seq, "\n");
|
|
return 0;
|
|
}
|
|
|
|
static const struct seq_operations yam_seqops = {
|
|
.start = yam_seq_start,
|
|
.next = yam_seq_next,
|
|
.stop = yam_seq_stop,
|
|
.show = yam_seq_show,
|
|
};
|
|
#endif
|
|
|
|
|
|
/* --------------------------------------------------------------------- */
|
|
|
|
static int yam_open(struct net_device *dev)
|
|
{
|
|
struct yam_port *yp = netdev_priv(dev);
|
|
enum uart u;
|
|
int i;
|
|
int ret=0;
|
|
|
|
printk(KERN_INFO "Trying %s at iobase 0x%lx irq %u\n", dev->name, dev->base_addr, dev->irq);
|
|
|
|
if (!yp->bitrate)
|
|
return -ENXIO;
|
|
if (!dev->base_addr || dev->base_addr > 0x1000 - YAM_EXTENT ||
|
|
dev->irq < 2 || dev->irq > 15) {
|
|
return -ENXIO;
|
|
}
|
|
if (!request_region(dev->base_addr, YAM_EXTENT, dev->name))
|
|
{
|
|
printk(KERN_ERR "%s: cannot 0x%lx busy\n", dev->name, dev->base_addr);
|
|
return -EACCES;
|
|
}
|
|
if ((u = yam_check_uart(dev->base_addr)) == c_uart_unknown) {
|
|
printk(KERN_ERR "%s: cannot find uart type\n", dev->name);
|
|
ret = -EIO;
|
|
goto out_release_base;
|
|
}
|
|
if (fpga_download(dev->base_addr, yp->bitrate)) {
|
|
printk(KERN_ERR "%s: cannot init FPGA\n", dev->name);
|
|
ret = -EIO;
|
|
goto out_release_base;
|
|
}
|
|
outb(0, IER(dev->base_addr));
|
|
if (request_irq(dev->irq, yam_interrupt, IRQF_SHARED, dev->name, dev)) {
|
|
printk(KERN_ERR "%s: irq %d busy\n", dev->name, dev->irq);
|
|
ret = -EBUSY;
|
|
goto out_release_base;
|
|
}
|
|
|
|
yam_set_uart(dev);
|
|
|
|
netif_start_queue(dev);
|
|
|
|
yp->slotcnt = yp->slot / 10;
|
|
|
|
/* Reset overruns for all ports - FPGA programming makes overruns */
|
|
for (i = 0; i < NR_PORTS; i++) {
|
|
struct net_device *yam_dev = yam_devs[i];
|
|
|
|
inb(LSR(yam_dev->base_addr));
|
|
yam_dev->stats.rx_fifo_errors = 0;
|
|
}
|
|
|
|
printk(KERN_INFO "%s at iobase 0x%lx irq %u uart %s\n", dev->name, dev->base_addr, dev->irq,
|
|
uart_str[u]);
|
|
return 0;
|
|
|
|
out_release_base:
|
|
release_region(dev->base_addr, YAM_EXTENT);
|
|
return ret;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------- */
|
|
|
|
static int yam_close(struct net_device *dev)
|
|
{
|
|
struct sk_buff *skb;
|
|
struct yam_port *yp = netdev_priv(dev);
|
|
|
|
if (!dev)
|
|
return -EINVAL;
|
|
|
|
/*
|
|
* disable interrupts
|
|
*/
|
|
outb(0, IER(dev->base_addr));
|
|
outb(1, MCR(dev->base_addr));
|
|
/* Remove IRQ handler if last */
|
|
free_irq(dev->irq,dev);
|
|
release_region(dev->base_addr, YAM_EXTENT);
|
|
netif_stop_queue(dev);
|
|
while ((skb = skb_dequeue(&yp->send_queue)))
|
|
dev_kfree_skb(skb);
|
|
|
|
printk(KERN_INFO "%s: close yam at iobase 0x%lx irq %u\n",
|
|
yam_drvname, dev->base_addr, dev->irq);
|
|
return 0;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------- */
|
|
|
|
static int yam_siocdevprivate(struct net_device *dev, struct ifreq *ifr, void __user *data, int cmd)
|
|
{
|
|
struct yam_port *yp = netdev_priv(dev);
|
|
struct yamdrv_ioctl_cfg yi;
|
|
struct yamdrv_ioctl_mcs *ym;
|
|
int ioctl_cmd;
|
|
|
|
if (copy_from_user(&ioctl_cmd, data, sizeof(int)))
|
|
return -EFAULT;
|
|
|
|
if (yp->magic != YAM_MAGIC)
|
|
return -EINVAL;
|
|
|
|
if (!capable(CAP_NET_ADMIN))
|
|
return -EPERM;
|
|
|
|
if (cmd != SIOCDEVPRIVATE)
|
|
return -EINVAL;
|
|
|
|
switch (ioctl_cmd) {
|
|
|
|
case SIOCYAMRESERVED:
|
|
return -EINVAL; /* unused */
|
|
|
|
case SIOCYAMSMCS:
|
|
if (netif_running(dev))
|
|
return -EINVAL; /* Cannot change this parameter when up */
|
|
ym = memdup_user(data, sizeof(struct yamdrv_ioctl_mcs));
|
|
if (IS_ERR(ym))
|
|
return PTR_ERR(ym);
|
|
if (ym->cmd != SIOCYAMSMCS || ym->bitrate > YAM_MAXBITRATE) {
|
|
kfree(ym);
|
|
return -EINVAL;
|
|
}
|
|
/* setting predef as 0 for loading userdefined mcs data */
|
|
add_mcs(ym->bits, ym->bitrate, 0);
|
|
kfree(ym);
|
|
break;
|
|
|
|
case SIOCYAMSCFG:
|
|
if (!capable(CAP_SYS_RAWIO))
|
|
return -EPERM;
|
|
if (copy_from_user(&yi, data, sizeof(struct yamdrv_ioctl_cfg)))
|
|
return -EFAULT;
|
|
|
|
if (yi.cmd != SIOCYAMSCFG)
|
|
return -EINVAL;
|
|
if ((yi.cfg.mask & YAM_IOBASE) && netif_running(dev))
|
|
return -EINVAL; /* Cannot change this parameter when up */
|
|
if ((yi.cfg.mask & YAM_IRQ) && netif_running(dev))
|
|
return -EINVAL; /* Cannot change this parameter when up */
|
|
if ((yi.cfg.mask & YAM_BITRATE) && netif_running(dev))
|
|
return -EINVAL; /* Cannot change this parameter when up */
|
|
if ((yi.cfg.mask & YAM_BAUDRATE) && netif_running(dev))
|
|
return -EINVAL; /* Cannot change this parameter when up */
|
|
|
|
if (yi.cfg.mask & YAM_IOBASE) {
|
|
yp->iobase = yi.cfg.iobase;
|
|
dev->base_addr = yi.cfg.iobase;
|
|
}
|
|
if (yi.cfg.mask & YAM_IRQ) {
|
|
if (yi.cfg.irq > 15)
|
|
return -EINVAL;
|
|
yp->irq = yi.cfg.irq;
|
|
dev->irq = yi.cfg.irq;
|
|
}
|
|
if (yi.cfg.mask & YAM_BITRATE) {
|
|
if (yi.cfg.bitrate > YAM_MAXBITRATE)
|
|
return -EINVAL;
|
|
yp->bitrate = yi.cfg.bitrate;
|
|
}
|
|
if (yi.cfg.mask & YAM_BAUDRATE) {
|
|
if (yi.cfg.baudrate > YAM_MAXBAUDRATE)
|
|
return -EINVAL;
|
|
yp->baudrate = yi.cfg.baudrate;
|
|
}
|
|
if (yi.cfg.mask & YAM_MODE) {
|
|
if (yi.cfg.mode > YAM_MAXMODE)
|
|
return -EINVAL;
|
|
yp->dupmode = yi.cfg.mode;
|
|
}
|
|
if (yi.cfg.mask & YAM_HOLDDLY) {
|
|
if (yi.cfg.holddly > YAM_MAXHOLDDLY)
|
|
return -EINVAL;
|
|
yp->holdd = yi.cfg.holddly;
|
|
}
|
|
if (yi.cfg.mask & YAM_TXDELAY) {
|
|
if (yi.cfg.txdelay > YAM_MAXTXDELAY)
|
|
return -EINVAL;
|
|
yp->txd = yi.cfg.txdelay;
|
|
}
|
|
if (yi.cfg.mask & YAM_TXTAIL) {
|
|
if (yi.cfg.txtail > YAM_MAXTXTAIL)
|
|
return -EINVAL;
|
|
yp->txtail = yi.cfg.txtail;
|
|
}
|
|
if (yi.cfg.mask & YAM_PERSIST) {
|
|
if (yi.cfg.persist > YAM_MAXPERSIST)
|
|
return -EINVAL;
|
|
yp->pers = yi.cfg.persist;
|
|
}
|
|
if (yi.cfg.mask & YAM_SLOTTIME) {
|
|
if (yi.cfg.slottime > YAM_MAXSLOTTIME)
|
|
return -EINVAL;
|
|
yp->slot = yi.cfg.slottime;
|
|
yp->slotcnt = yp->slot / 10;
|
|
}
|
|
break;
|
|
|
|
case SIOCYAMGCFG:
|
|
memset(&yi, 0, sizeof(yi));
|
|
yi.cfg.mask = 0xffffffff;
|
|
yi.cfg.iobase = yp->iobase;
|
|
yi.cfg.irq = yp->irq;
|
|
yi.cfg.bitrate = yp->bitrate;
|
|
yi.cfg.baudrate = yp->baudrate;
|
|
yi.cfg.mode = yp->dupmode;
|
|
yi.cfg.txdelay = yp->txd;
|
|
yi.cfg.holddly = yp->holdd;
|
|
yi.cfg.txtail = yp->txtail;
|
|
yi.cfg.persist = yp->pers;
|
|
yi.cfg.slottime = yp->slot;
|
|
if (copy_to_user(data, &yi, sizeof(struct yamdrv_ioctl_cfg)))
|
|
return -EFAULT;
|
|
break;
|
|
|
|
default:
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------- */
|
|
|
|
static int yam_set_mac_address(struct net_device *dev, void *addr)
|
|
{
|
|
struct sockaddr *sa = (struct sockaddr *) addr;
|
|
|
|
/* addr is an AX.25 shifted ASCII mac address */
|
|
dev_addr_set(dev, sa->sa_data);
|
|
return 0;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------- */
|
|
|
|
static const struct net_device_ops yam_netdev_ops = {
|
|
.ndo_open = yam_open,
|
|
.ndo_stop = yam_close,
|
|
.ndo_start_xmit = yam_send_packet,
|
|
.ndo_siocdevprivate = yam_siocdevprivate,
|
|
.ndo_set_mac_address = yam_set_mac_address,
|
|
};
|
|
|
|
static void yam_setup(struct net_device *dev)
|
|
{
|
|
struct yam_port *yp = netdev_priv(dev);
|
|
|
|
yp->magic = YAM_MAGIC;
|
|
yp->bitrate = DEFAULT_BITRATE;
|
|
yp->baudrate = DEFAULT_BITRATE * 2;
|
|
yp->iobase = 0;
|
|
yp->irq = 0;
|
|
yp->dupmode = 0;
|
|
yp->holdd = DEFAULT_HOLDD;
|
|
yp->txd = DEFAULT_TXD;
|
|
yp->txtail = DEFAULT_TXTAIL;
|
|
yp->slot = DEFAULT_SLOT;
|
|
yp->pers = DEFAULT_PERS;
|
|
yp->dev = dev;
|
|
|
|
dev->base_addr = yp->iobase;
|
|
dev->irq = yp->irq;
|
|
|
|
skb_queue_head_init(&yp->send_queue);
|
|
|
|
dev->netdev_ops = &yam_netdev_ops;
|
|
dev->header_ops = &ax25_header_ops;
|
|
|
|
dev->type = ARPHRD_AX25;
|
|
dev->hard_header_len = AX25_MAX_HEADER_LEN;
|
|
dev->mtu = AX25_MTU;
|
|
dev->addr_len = AX25_ADDR_LEN;
|
|
memcpy(dev->broadcast, &ax25_bcast, AX25_ADDR_LEN);
|
|
dev_addr_set(dev, (u8 *)&ax25_defaddr);
|
|
}
|
|
|
|
static int __init yam_init_driver(void)
|
|
{
|
|
struct net_device *dev;
|
|
int i, err;
|
|
char name[IFNAMSIZ];
|
|
|
|
printk(yam_drvinfo);
|
|
|
|
for (i = 0; i < NR_PORTS; i++) {
|
|
sprintf(name, "yam%d", i);
|
|
|
|
dev = alloc_netdev(sizeof(struct yam_port), name,
|
|
NET_NAME_UNKNOWN, yam_setup);
|
|
if (!dev) {
|
|
pr_err("yam: cannot allocate net device\n");
|
|
err = -ENOMEM;
|
|
goto error;
|
|
}
|
|
|
|
err = register_netdev(dev);
|
|
if (err) {
|
|
printk(KERN_WARNING "yam: cannot register net device %s\n", dev->name);
|
|
free_netdev(dev);
|
|
goto error;
|
|
}
|
|
yam_devs[i] = dev;
|
|
|
|
}
|
|
|
|
timer_setup(&yam_timer, yam_dotimer, 0);
|
|
yam_timer.expires = jiffies + HZ / 100;
|
|
add_timer(&yam_timer);
|
|
|
|
proc_create_seq("yam", 0444, init_net.proc_net, &yam_seqops);
|
|
return 0;
|
|
error:
|
|
while (--i >= 0) {
|
|
unregister_netdev(yam_devs[i]);
|
|
free_netdev(yam_devs[i]);
|
|
}
|
|
return err;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------- */
|
|
|
|
static void __exit yam_cleanup_driver(void)
|
|
{
|
|
struct yam_mcs *p;
|
|
int i;
|
|
|
|
del_timer_sync(&yam_timer);
|
|
for (i = 0; i < NR_PORTS; i++) {
|
|
struct net_device *dev = yam_devs[i];
|
|
if (dev) {
|
|
unregister_netdev(dev);
|
|
free_netdev(dev);
|
|
}
|
|
}
|
|
|
|
while (yam_data) {
|
|
p = yam_data;
|
|
yam_data = yam_data->next;
|
|
kfree(p);
|
|
}
|
|
|
|
remove_proc_entry("yam", init_net.proc_net);
|
|
}
|
|
|
|
/* --------------------------------------------------------------------- */
|
|
|
|
MODULE_AUTHOR("Frederic Rible F1OAT frible@teaser.fr");
|
|
MODULE_DESCRIPTION("Yam amateur radio modem driver");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_FIRMWARE(FIRMWARE_1200);
|
|
MODULE_FIRMWARE(FIRMWARE_9600);
|
|
|
|
module_init(yam_init_driver);
|
|
module_exit(yam_cleanup_driver);
|
|
|
|
/* --------------------------------------------------------------------- */
|
|
|