// SPDX-License-Identifier: GPL-2.0-or-later /*****************************************************************************/ /* * yam.c -- YAM radio modem driver. * * Copyright (C) 1998 Frederic Rible F1OAT ([email protected]) * Adapted from baycom.c driver written by Thomas Sailer ([email protected]) * * Please note that the GPL allows you to use the driver, NOT the radio. * In order to use the radio, you need a license from the communications * authority of your country. * * History: * 0.0 F1OAT 06.06.98 Begin of work with baycom.c source code V 0.3 * 0.1 F1OAT 07.06.98 Add timer polling routine for channel arbitration * 0.2 F6FBB 08.06.98 Added delay after FPGA programming * 0.3 F6FBB 29.07.98 Delayed PTT implementation for dupmode=2 * 0.4 F6FBB 30.07.98 Added TxTail, Slottime and Persistence * 0.5 F6FBB 01.08.98 Shared IRQs, /proc/net and network statistics * 0.6 F6FBB 25.08.98 Added 1200Bds format * 0.7 F6FBB 12.09.98 Added to the kernel configuration * 0.8 F6FBB 14.10.98 Fixed slottime/persistence timing bug * OK1ZIA 2.09.01 Fixed "kfree_skb on hard IRQ" * using dev_kfree_skb_any(). (important in 2.4 kernel) */ /*****************************************************************************/ #include <linux/module.h> #include <linux/types.h> #include <linux/net.h> #include <linux/in.h> #include <linux/if.h> #include <linux/slab.h> #include <linux/errno.h> #include <linux/bitops.h> #include <linux/random.h> #include <asm/io.h> #include <linux/interrupt.h> #include <linux/ioport.h> #include <linux/firmware.h> #include <linux/platform_device.h> #include <linux/netdevice.h> #include <linux/if_arp.h> #include <linux/etherdevice.h> #include <linux/skbuff.h> #include <net/ax25.h> #include <linux/kernel.h> #include <linux/proc_fs.h> #include <linux/seq_file.h> #include <net/net_namespace.h> #include <linux/uaccess.h> #include <linux/init.h> #include <linux/yam.h> /* --------------------------------------------------------------------- */ static const char yam_drvname[] = …; static const char yam_drvinfo[] __initconst = …; /* --------------------------------------------------------------------- */ #define FIRMWARE_9600 … #define FIRMWARE_1200 … #define YAM_9600 … #define YAM_1200 … #define NR_PORTS … #define YAM_MAGIC … /* Transmitter states */ #define TX_OFF … #define TX_HEAD … #define TX_DATA … #define TX_CRC1 … #define TX_CRC2 … #define TX_TAIL … #define YAM_MAX_FRAME … #define DEFAULT_BITRATE … #define DEFAULT_HOLDD … #define DEFAULT_TXD … #define DEFAULT_TXTAIL … #define DEFAULT_SLOT … #define DEFAULT_PERS … struct yam_port { … }; struct yam_mcs { … }; static struct net_device *yam_devs[NR_PORTS]; static struct yam_mcs *yam_data; static DEFINE_TIMER(yam_timer, NULL); /* --------------------------------------------------------------------- */ #define RBR(iobase) … #define THR(iobase) … #define IER(iobase) … #define IIR(iobase) … #define FCR(iobase) … #define LCR(iobase) … #define MCR(iobase) … #define LSR(iobase) … #define MSR(iobase) … #define SCR(iobase) … #define DLL(iobase) … #define DLM(iobase) … #define YAM_EXTENT … /* Interrupt Identification Register Bit Masks */ #define IIR_NOPEND … #define IIR_MSR … #define IIR_TX … #define IIR_RX … #define IIR_LSR … #define IIR_TIMEOUT … #define IIR_MASK … /* Interrupt Enable Register Bit Masks */ #define IER_RX … #define IER_TX … #define IER_LSR … #define IER_MSR … /* Modem Control Register Bit Masks */ #define MCR_DTR … #define MCR_RTS … #define MCR_OUT1 … #define MCR_OUT2 … #define MCR_LOOP … /* Modem Status Register Bit Masks */ #define MSR_DCTS … #define MSR_DDSR … #define MSR_DRIN … #define MSR_DDCD … #define MSR_CTS … #define MSR_DSR … #define MSR_RING … #define MSR_DCD … /* line status register bit mask */ #define LSR_RXC … #define LSR_OE … #define LSR_PE … #define LSR_FE … #define LSR_BREAK … #define LSR_THRE … #define LSR_TSRE … /* Line Control Register Bit Masks */ #define LCR_DLAB … #define LCR_BREAK … #define LCR_PZERO … #define LCR_PEVEN … #define LCR_PODD … #define LCR_STOP1 … #define LCR_STOP2 … #define LCR_BIT5 … #define LCR_BIT6 … #define LCR_BIT7 … #define LCR_BIT8 … /* YAM Modem <-> UART Port mapping */ #define TX_RDY … #define RX_DCD … #define RX_FLAG … #define FPGA_DONE … #define PTT_ON … #define PTT_OFF … #define ENABLE_RXINT … #define ENABLE_TXINT … #define ENABLE_RTXINT … /************************************************************************* * CRC Tables ************************************************************************/ static const unsigned char chktabl[256] = …; static const unsigned char chktabh[256] = …; /************************************************************************* * FPGA functions ************************************************************************/ static void delay(int ms) { … } /* * reset FPGA */ static void fpga_reset(int iobase) { … } /* * send one byte to FPGA */ static int fpga_write(int iobase, unsigned char wrd) { … } /* * predef should be 0 for loading user defined mcs * predef should be YAM_1200 for loading predef 1200 mcs * predef should be YAM_9600 for loading predef 9600 mcs */ static unsigned char *add_mcs(unsigned char *bits, int bitrate, unsigned int predef) { … } static unsigned char *get_mcs(int bitrate) { … } /* * download bitstream to FPGA * data is contained in bits[] array in yam1200.h resp. yam9600.h */ static int fpga_download(int iobase, int bitrate) { … } /************************************************************************ * Serial port init ************************************************************************/ static void yam_set_uart(struct net_device *dev) { … } /* --------------------------------------------------------------------- */ enum uart { … }; static const char *uart_str[] = …; static enum uart yam_check_uart(unsigned int iobase) { … } /****************************************************************************** * Rx Section ******************************************************************************/ static inline void yam_rx_flag(struct net_device *dev, struct yam_port *yp) { … } static inline void yam_rx_byte(struct net_device *dev, struct yam_port *yp, unsigned char rxb) { … } /******************************************************************************** * TX Section ********************************************************************************/ static void ptt_on(struct net_device *dev) { … } static void ptt_off(struct net_device *dev) { … } static netdev_tx_t yam_send_packet(struct sk_buff *skb, struct net_device *dev) { … } static void yam_start_tx(struct net_device *dev, struct yam_port *yp) { … } static void yam_arbitrate(struct net_device *dev) { … } static void yam_dotimer(struct timer_list *unused) { … } static void yam_tx_byte(struct net_device *dev, struct yam_port *yp) { … } /*********************************************************************************** * ISR routine ************************************************************************************/ static irqreturn_t yam_interrupt(int irq, void *dev_id) { … } #ifdef CONFIG_PROC_FS static void *yam_seq_start(struct seq_file *seq, loff_t *pos) { … } static void *yam_seq_next(struct seq_file *seq, void *v, loff_t *pos) { … } static void yam_seq_stop(struct seq_file *seq, void *v) { … } static int yam_seq_show(struct seq_file *seq, void *v) { … } static const struct seq_operations yam_seqops = …; #endif /* --------------------------------------------------------------------- */ static int yam_open(struct net_device *dev) { … } /* --------------------------------------------------------------------- */ static int yam_close(struct net_device *dev) { … } /* --------------------------------------------------------------------- */ static int yam_siocdevprivate(struct net_device *dev, struct ifreq *ifr, void __user *data, int cmd) { … } /* --------------------------------------------------------------------- */ static int yam_set_mac_address(struct net_device *dev, void *addr) { … } /* --------------------------------------------------------------------- */ static const struct net_device_ops yam_netdev_ops = …; static void yam_setup(struct net_device *dev) { … } static int __init yam_init_driver(void) { … } /* --------------------------------------------------------------------- */ static void __exit yam_cleanup_driver(void) { … } /* --------------------------------------------------------------------- */ MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; MODULE_FIRMWARE(…); MODULE_FIRMWARE(…); module_init(…) …; module_exit(yam_cleanup_driver); /* --------------------------------------------------------------------- */
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