| // SPDX-License-Identifier: GPL-2.0-or-later |
| /*****************************************************************************/ |
| |
| /* |
| * baycom_epp.c -- baycom epp radio modem driver. |
| * |
| * Copyright (C) 1998-2000 |
| * Thomas Sailer (sailer@ife.ee.ethz.ch) |
| * |
| * 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: |
| * 0.1 xx.xx.1998 Initial version by Matthias Welwarsky (dg2fef) |
| * 0.2 21.04.1998 Massive rework by Thomas Sailer |
| * Integrated FPGA EPP modem configuration routines |
| * 0.3 11.05.1998 Took FPGA config out and moved it into a separate program |
| * 0.4 26.07.1999 Adapted to new lowlevel parport driver interface |
| * 0.5 03.08.1999 adapt to Linus' new __setup/__initcall |
| * removed some pre-2.2 kernel compatibility cruft |
| * 0.6 10.08.1999 Check if parport can do SPP and is safe to access during interrupt contexts |
| * 0.7 12.02.2000 adapted to softnet driver interface |
| */ |
| |
| /*****************************************************************************/ |
| |
| #include <linux/crc-ccitt.h> |
| #include <linux/module.h> |
| #include <linux/kernel.h> |
| #include <linux/init.h> |
| #include <linux/sched.h> |
| #include <linux/string.h> |
| #include <linux/workqueue.h> |
| #include <linux/fs.h> |
| #include <linux/parport.h> |
| #include <linux/if_arp.h> |
| #include <linux/hdlcdrv.h> |
| #include <linux/baycom.h> |
| #include <linux/jiffies.h> |
| #include <linux/random.h> |
| #include <net/ax25.h> |
| #include <linux/uaccess.h> |
| |
| /* --------------------------------------------------------------------- */ |
| |
| #define BAYCOM_DEBUG |
| #define BAYCOM_MAGIC 19730510 |
| |
| /* --------------------------------------------------------------------- */ |
| |
| static const char paranoia_str[] = KERN_ERR |
| "baycom_epp: bad magic number for hdlcdrv_state struct in routine %s\n"; |
| |
| static const char bc_drvname[] = "baycom_epp"; |
| static const char bc_drvinfo[] = KERN_INFO "baycom_epp: (C) 1998-2000 Thomas Sailer, HB9JNX/AE4WA\n" |
| "baycom_epp: version 0.7\n"; |
| |
| /* --------------------------------------------------------------------- */ |
| |
| #define NR_PORTS 4 |
| |
| static struct net_device *baycom_device[NR_PORTS]; |
| |
| /* --------------------------------------------------------------------- */ |
| |
| /* EPP status register */ |
| #define EPP_DCDBIT 0x80 |
| #define EPP_PTTBIT 0x08 |
| #define EPP_NREF 0x01 |
| #define EPP_NRAEF 0x02 |
| #define EPP_NRHF 0x04 |
| #define EPP_NTHF 0x20 |
| #define EPP_NTAEF 0x10 |
| #define EPP_NTEF EPP_PTTBIT |
| |
| /* EPP control register */ |
| #define EPP_TX_FIFO_ENABLE 0x10 |
| #define EPP_RX_FIFO_ENABLE 0x08 |
| #define EPP_MODEM_ENABLE 0x20 |
| #define EPP_LEDS 0xC0 |
| #define EPP_IRQ_ENABLE 0x10 |
| |
| /* LPT registers */ |
| #define LPTREG_ECONTROL 0x402 |
| #define LPTREG_CONFIGB 0x401 |
| #define LPTREG_CONFIGA 0x400 |
| #define LPTREG_EPPDATA 0x004 |
| #define LPTREG_EPPADDR 0x003 |
| #define LPTREG_CONTROL 0x002 |
| #define LPTREG_STATUS 0x001 |
| #define LPTREG_DATA 0x000 |
| |
| /* LPT control register */ |
| #define LPTCTRL_PROGRAM 0x04 /* 0 to reprogram */ |
| #define LPTCTRL_WRITE 0x01 |
| #define LPTCTRL_ADDRSTB 0x08 |
| #define LPTCTRL_DATASTB 0x02 |
| #define LPTCTRL_INTEN 0x10 |
| |
| /* LPT status register */ |
| #define LPTSTAT_SHIFT_NINTR 6 |
| #define LPTSTAT_WAIT 0x80 |
| #define LPTSTAT_NINTR (1<<LPTSTAT_SHIFT_NINTR) |
| #define LPTSTAT_PE 0x20 |
| #define LPTSTAT_DONE 0x10 |
| #define LPTSTAT_NERROR 0x08 |
| #define LPTSTAT_EPPTIMEOUT 0x01 |
| |
| /* LPT data register */ |
| #define LPTDATA_SHIFT_TDI 0 |
| #define LPTDATA_SHIFT_TMS 2 |
| #define LPTDATA_TDI (1<<LPTDATA_SHIFT_TDI) |
| #define LPTDATA_TCK 0x02 |
| #define LPTDATA_TMS (1<<LPTDATA_SHIFT_TMS) |
| #define LPTDATA_INITBIAS 0x80 |
| |
| |
| /* EPP modem config/status bits */ |
| #define EPP_DCDBIT 0x80 |
| #define EPP_PTTBIT 0x08 |
| #define EPP_RXEBIT 0x01 |
| #define EPP_RXAEBIT 0x02 |
| #define EPP_RXHFULL 0x04 |
| |
| #define EPP_NTHF 0x20 |
| #define EPP_NTAEF 0x10 |
| #define EPP_NTEF EPP_PTTBIT |
| |
| #define EPP_TX_FIFO_ENABLE 0x10 |
| #define EPP_RX_FIFO_ENABLE 0x08 |
| #define EPP_MODEM_ENABLE 0x20 |
| #define EPP_LEDS 0xC0 |
| #define EPP_IRQ_ENABLE 0x10 |
| |
| /* Xilinx 4k JTAG instructions */ |
| #define XC4K_IRLENGTH 3 |
| #define XC4K_EXTEST 0 |
| #define XC4K_PRELOAD 1 |
| #define XC4K_CONFIGURE 5 |
| #define XC4K_BYPASS 7 |
| |
| #define EPP_CONVENTIONAL 0 |
| #define EPP_FPGA 1 |
| #define EPP_FPGAEXTSTATUS 2 |
| |
| #define TXBUFFER_SIZE ((HDLCDRV_MAXFLEN*6/5)+8) |
| |
| /* ---------------------------------------------------------------------- */ |
| /* |
| * Information that need to be kept for each board. |
| */ |
| |
| struct baycom_state { |
| int magic; |
| |
| struct pardevice *pdev; |
| struct net_device *dev; |
| unsigned int work_running; |
| struct delayed_work run_work; |
| unsigned int modem; |
| unsigned int bitrate; |
| unsigned char stat; |
| |
| struct { |
| unsigned int intclk; |
| unsigned int fclk; |
| unsigned int bps; |
| unsigned int extmodem; |
| unsigned int loopback; |
| } cfg; |
| |
| struct hdlcdrv_channel_params ch_params; |
| |
| struct { |
| unsigned int bitbuf, bitstream, numbits, state; |
| unsigned char *bufptr; |
| int bufcnt; |
| unsigned char buf[TXBUFFER_SIZE]; |
| } hdlcrx; |
| |
| struct { |
| int calibrate; |
| int slotcnt; |
| int flags; |
| enum { tx_idle = 0, tx_keyup, tx_data, tx_tail } state; |
| unsigned char *bufptr; |
| int bufcnt; |
| unsigned char buf[TXBUFFER_SIZE]; |
| } hdlctx; |
| |
| unsigned int ptt_keyed; |
| struct sk_buff *skb; /* next transmit packet */ |
| |
| #ifdef BAYCOM_DEBUG |
| struct debug_vals { |
| unsigned long last_jiffies; |
| unsigned cur_intcnt; |
| unsigned last_intcnt; |
| int cur_pllcorr; |
| int last_pllcorr; |
| unsigned int mod_cycles; |
| unsigned int demod_cycles; |
| } debug_vals; |
| #endif /* BAYCOM_DEBUG */ |
| }; |
| |
| /* --------------------------------------------------------------------- */ |
| |
| #define KISS_VERBOSE |
| |
| /* --------------------------------------------------------------------- */ |
| |
| #define PARAM_TXDELAY 1 |
| #define PARAM_PERSIST 2 |
| #define PARAM_SLOTTIME 3 |
| #define PARAM_TXTAIL 4 |
| #define PARAM_FULLDUP 5 |
| #define PARAM_HARDWARE 6 |
| #define PARAM_RETURN 255 |
| |
| /* --------------------------------------------------------------------- */ |
| /* |
| * the CRC routines are stolen from WAMPES |
| * by Dieter Deyke |
| */ |
| |
| |
| /*---------------------------------------------------------------------------*/ |
| |
| #if 0 |
| static inline void append_crc_ccitt(unsigned char *buffer, int len) |
| { |
| unsigned int crc = 0xffff; |
| |
| for (;len>0;len--) |
| crc = (crc >> 8) ^ crc_ccitt_table[(crc ^ *buffer++) & 0xff]; |
| crc ^= 0xffff; |
| *buffer++ = crc; |
| *buffer++ = crc >> 8; |
| } |
| #endif |
| |
| /*---------------------------------------------------------------------------*/ |
| |
| static inline int check_crc_ccitt(const unsigned char *buf, int cnt) |
| { |
| return (crc_ccitt(0xffff, buf, cnt) & 0xffff) == 0xf0b8; |
| } |
| |
| /*---------------------------------------------------------------------------*/ |
| |
| static inline int calc_crc_ccitt(const unsigned char *buf, int cnt) |
| { |
| return (crc_ccitt(0xffff, buf, cnt) ^ 0xffff) & 0xffff; |
| } |
| |
| /* ---------------------------------------------------------------------- */ |
| |
| #define tenms_to_flags(bc,tenms) ((tenms * bc->bitrate) / 800) |
| |
| /* --------------------------------------------------------------------- */ |
| |
| static inline void baycom_int_freq(struct baycom_state *bc) |
| { |
| #ifdef BAYCOM_DEBUG |
| unsigned long cur_jiffies = jiffies; |
| /* |
| * measure the interrupt frequency |
| */ |
| bc->debug_vals.cur_intcnt++; |
| if (time_after_eq(cur_jiffies, bc->debug_vals.last_jiffies + HZ)) { |
| bc->debug_vals.last_jiffies = cur_jiffies; |
| bc->debug_vals.last_intcnt = bc->debug_vals.cur_intcnt; |
| bc->debug_vals.cur_intcnt = 0; |
| bc->debug_vals.last_pllcorr = bc->debug_vals.cur_pllcorr; |
| bc->debug_vals.cur_pllcorr = 0; |
| } |
| #endif /* BAYCOM_DEBUG */ |
| } |
| |
| /* ---------------------------------------------------------------------- */ |
| /* |
| * eppconfig_path should be setable via /proc/sys. |
| */ |
| |
| static char const eppconfig_path[] = "/usr/sbin/eppfpga"; |
| |
| static char *envp[] = { "HOME=/", "TERM=linux", "PATH=/usr/bin:/bin", NULL }; |
| |
| /* eppconfig: called during ifconfig up to configure the modem */ |
| static int eppconfig(struct baycom_state *bc) |
| { |
| char modearg[256]; |
| char portarg[16]; |
| char *argv[] = { |
| (char *)eppconfig_path, |
| "-s", |
| "-p", portarg, |
| "-m", modearg, |
| NULL }; |
| |
| /* set up arguments */ |
| sprintf(modearg, "%sclk,%smodem,fclk=%d,bps=%d,divider=%d%s,extstat", |
| bc->cfg.intclk ? "int" : "ext", |
| bc->cfg.extmodem ? "ext" : "int", bc->cfg.fclk, bc->cfg.bps, |
| (bc->cfg.fclk + 8 * bc->cfg.bps) / (16 * bc->cfg.bps), |
| bc->cfg.loopback ? ",loopback" : ""); |
| sprintf(portarg, "%ld", bc->pdev->port->base); |
| printk(KERN_DEBUG "%s: %s -s -p %s -m %s\n", bc_drvname, eppconfig_path, portarg, modearg); |
| |
| return call_usermodehelper(eppconfig_path, argv, envp, UMH_WAIT_PROC); |
| } |
| |
| /* ---------------------------------------------------------------------- */ |
| |
| static inline void do_kiss_params(struct baycom_state *bc, |
| unsigned char *data, unsigned long len) |
| { |
| |
| #ifdef KISS_VERBOSE |
| #define PKP(a,b) printk(KERN_INFO "baycomm_epp: channel params: " a "\n", b) |
| #else /* KISS_VERBOSE */ |
| #define PKP(a,b) |
| #endif /* KISS_VERBOSE */ |
| |
| if (len < 2) |
| return; |
| switch(data[0]) { |
| case PARAM_TXDELAY: |
| bc->ch_params.tx_delay = data[1]; |
| PKP("TX delay = %ums", 10 * bc->ch_params.tx_delay); |
| break; |
| case PARAM_PERSIST: |
| bc->ch_params.ppersist = data[1]; |
| PKP("p persistence = %u", bc->ch_params.ppersist); |
| break; |
| case PARAM_SLOTTIME: |
| bc->ch_params.slottime = data[1]; |
| PKP("slot time = %ums", bc->ch_params.slottime); |
| break; |
| case PARAM_TXTAIL: |
| bc->ch_params.tx_tail = data[1]; |
| PKP("TX tail = %ums", bc->ch_params.tx_tail); |
| break; |
| case PARAM_FULLDUP: |
| bc->ch_params.fulldup = !!data[1]; |
| PKP("%s duplex", bc->ch_params.fulldup ? "full" : "half"); |
| break; |
| default: |
| break; |
| } |
| #undef PKP |
| } |
| |
| /* --------------------------------------------------------------------- */ |
| |
| static void encode_hdlc(struct baycom_state *bc) |
| { |
| struct sk_buff *skb; |
| unsigned char *wp, *bp; |
| int pkt_len; |
| unsigned bitstream, notbitstream, bitbuf, numbit, crc; |
| unsigned char crcarr[2]; |
| int j; |
| |
| if (bc->hdlctx.bufcnt > 0) |
| return; |
| skb = bc->skb; |
| if (!skb) |
| return; |
| bc->skb = NULL; |
| pkt_len = skb->len-1; /* strip KISS byte */ |
| wp = bc->hdlctx.buf; |
| bp = skb->data+1; |
| crc = calc_crc_ccitt(bp, pkt_len); |
| crcarr[0] = crc; |
| crcarr[1] = crc >> 8; |
| *wp++ = 0x7e; |
| bitstream = bitbuf = numbit = 0; |
| while (pkt_len > -2) { |
| bitstream >>= 8; |
| bitstream |= ((unsigned int)*bp) << 8; |
| bitbuf |= ((unsigned int)*bp) << numbit; |
| notbitstream = ~bitstream; |
| bp++; |
| pkt_len--; |
| if (!pkt_len) |
| bp = crcarr; |
| for (j = 0; j < 8; j++) |
| if (unlikely(!(notbitstream & (0x1f0 << j)))) { |
| bitstream &= ~(0x100 << j); |
| bitbuf = (bitbuf & (((2 << j) << numbit) - 1)) | |
| ((bitbuf & ~(((2 << j) << numbit) - 1)) << 1); |
| numbit++; |
| notbitstream = ~bitstream; |
| } |
| numbit += 8; |
| while (numbit >= 8) { |
| *wp++ = bitbuf; |
| bitbuf >>= 8; |
| numbit -= 8; |
| } |
| } |
| bitbuf |= 0x7e7e << numbit; |
| numbit += 16; |
| while (numbit >= 8) { |
| *wp++ = bitbuf; |
| bitbuf >>= 8; |
| numbit -= 8; |
| } |
| bc->hdlctx.bufptr = bc->hdlctx.buf; |
| bc->hdlctx.bufcnt = wp - bc->hdlctx.buf; |
| dev_kfree_skb(skb); |
| bc->dev->stats.tx_packets++; |
| } |
| |
| /* ---------------------------------------------------------------------- */ |
| |
| static int transmit(struct baycom_state *bc, int cnt, unsigned char stat) |
| { |
| struct parport *pp = bc->pdev->port; |
| unsigned char tmp[128]; |
| int i, j; |
| |
| if (bc->hdlctx.state == tx_tail && !(stat & EPP_PTTBIT)) |
| bc->hdlctx.state = tx_idle; |
| if (bc->hdlctx.state == tx_idle && bc->hdlctx.calibrate <= 0) { |
| if (bc->hdlctx.bufcnt <= 0) |
| encode_hdlc(bc); |
| if (bc->hdlctx.bufcnt <= 0) |
| return 0; |
| if (!bc->ch_params.fulldup) { |
| if (!(stat & EPP_DCDBIT)) { |
| bc->hdlctx.slotcnt = bc->ch_params.slottime; |
| return 0; |
| } |
| if ((--bc->hdlctx.slotcnt) > 0) |
| return 0; |
| bc->hdlctx.slotcnt = bc->ch_params.slottime; |
| if (get_random_u8() > bc->ch_params.ppersist) |
| return 0; |
| } |
| } |
| if (bc->hdlctx.state == tx_idle && bc->hdlctx.bufcnt > 0) { |
| bc->hdlctx.state = tx_keyup; |
| bc->hdlctx.flags = tenms_to_flags(bc, bc->ch_params.tx_delay); |
| bc->ptt_keyed++; |
| } |
| while (cnt > 0) { |
| switch (bc->hdlctx.state) { |
| case tx_keyup: |
| i = min_t(int, cnt, bc->hdlctx.flags); |
| cnt -= i; |
| bc->hdlctx.flags -= i; |
| if (bc->hdlctx.flags <= 0) |
| bc->hdlctx.state = tx_data; |
| 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; |
| |
| case tx_data: |
| if (bc->hdlctx.bufcnt <= 0) { |
| encode_hdlc(bc); |
| if (bc->hdlctx.bufcnt <= 0) { |
| bc->hdlctx.state = tx_tail; |
| bc->hdlctx.flags = tenms_to_flags(bc, bc->ch_params.tx_tail); |
| break; |
| } |
| } |
| i = min_t(int, cnt, bc->hdlctx.bufcnt); |
| bc->hdlctx.bufcnt -= i; |
| cnt -= i; |
| if (i != pp->ops->epp_write_data(pp, bc->hdlctx.bufptr, i, 0)) |
| return -1; |
| bc->hdlctx.bufptr += i; |
| break; |
| |
| case tx_tail: |
| encode_hdlc(bc); |
| if (bc->hdlctx.bufcnt > 0) { |
| bc->hdlctx.state = tx_data; |
| break; |
| } |
| i = min_t(int, cnt, bc->hdlctx.flags); |
| if (i) { |
| cnt -= i; |
| 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; |
| } |
| fallthrough; |
| |
| default: |
| 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; |
| |
| /* 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; |
| } |
| |
| /* --------------------------------------------------------------------- */ |
| |
| #if defined(__i386__) && !defined(CONFIG_UML) |
| #include <asm/msr.h> |
| #define GETTICK(x) \ |
| ({ \ |
| if (boot_cpu_has(X86_FEATURE_TSC)) \ |
| x = (unsigned int)rdtsc(); \ |
| }) |
| #else /* __i386__ && !CONFIG_UML */ |
| #define GETTICK(x) |
| #endif /* __i386__ && !CONFIG_UML */ |
| |
| 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->protocol == htons(ETH_P_IP)) |
| return ax25_ip_xmit(skb); |
| |
| if (skb->data[0] != 0) { |
| do_kiss_params(bc, skb->data, skb->len); |
| dev_kfree_skb(skb); |
| return NETDEV_TX_OK; |
| } |
| if (bc->skb) { |
| dev_kfree_skb(skb); |
| return NETDEV_TX_OK; |
| } |
| /* 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 */ |
| dev_addr_set(dev, sa->sa_data); |
| 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; |
| struct pardev_cb par_cb; |
| |
| 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)); |
| memset(&par_cb, 0, sizeof(par_cb)); |
| par_cb.wakeup = epp_wakeup; |
| par_cb.private = (void *)dev; |
| par_cb.flags = PARPORT_DEV_EXCL; |
| for (i = 0; i < NR_PORTS; i++) |
| if (baycom_device[i] == dev) |
| break; |
| |
| if (i == NR_PORTS) { |
| pr_err("%s: no device found\n", bc_drvname); |
| parport_put_port(pp); |
| return -ENODEV; |
| } |
| |
| bc->pdev = parport_register_dev_model(pp, dev->name, &par_cb, i); |
| 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); |
| 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,"loopback")) |
| bc->cfg.loopback = 1; |
| if (strstr(modestr, "noloopback")) |
| bc->cfg.loopback = 0; |
| 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_siocdevprivate(struct net_device *dev, struct ifreq *ifr, |
| void __user *data, int cmd) |
| { |
| struct baycom_state *bc = netdev_priv(dev); |
| struct hdlcdrv_ioctl hi; |
| |
| if (cmd != SIOCDEVPRIVATE) |
| return -ENOIOCTLCMD; |
| |
| if (copy_from_user(&hi, 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(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_siocdevprivate = baycom_siocdevprivate, |
| .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); |
| dev_addr_set(dev, (u8 *)&null_ax25_address); |
| dev->tx_queue_len = 16; |
| |
| /* New style flags */ |
| dev->flags = 0; |
| } |
| |
| /* --------------------------------------------------------------------- */ |
| |
| /* |
| * command line settable parameters |
| */ |
| static 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_hw_array(iobase, int, ioport, 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 int baycom_epp_par_probe(struct pardevice *par_dev) |
| { |
| struct device_driver *drv = par_dev->dev.driver; |
| int len = strlen(drv->name); |
| |
| if (strncmp(par_dev->name, drv->name, len)) |
| return -ENODEV; |
| |
| return 0; |
| } |
| |
| static struct parport_driver baycom_epp_par_driver = { |
| .name = "bce", |
| .probe = baycom_epp_par_probe, |
| .devmodel = true, |
| }; |
| |
| 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, ret; |
| char set_hw = 1; |
| |
| printk(bc_drvinfo); |
| |
| ret = parport_register_driver(&baycom_epp_par_driver); |
| if (ret) |
| return ret; |
| |
| /* |
| * register net devices |
| */ |
| for (i = 0; i < NR_PORTS; i++) { |
| struct net_device *dev; |
| |
| dev = alloc_netdev(sizeof(struct baycom_state), "bce%d", |
| NET_NAME_UNKNOWN, 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++; |
| } |
| |
| if (found == 0) { |
| parport_unregister_driver(&baycom_epp_par_driver); |
| return -ENXIO; |
| } |
| |
| return 0; |
| } |
| |
| 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"); |
| } |
| } |
| parport_unregister_driver(&baycom_epp_par_driver); |
| } |
| |
| 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 */ |
| /* --------------------------------------------------------------------- */ |