1 /*****************************************************************************/ 2 3 /* 4 * yam.c -- YAM radio modem driver. 5 * 6 * Copyright (C) 1998 Frederic Rible F1OAT (frible@teaser.fr) 7 * Adapted from baycom.c driver written by Thomas Sailer (sailer@ife.ee.ethz.ch) 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2 of the License, or 12 * (at your option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program; if not, write to the Free Software 21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 22 * 23 * Please note that the GPL allows you to use the driver, NOT the radio. 24 * In order to use the radio, you need a license from the communications 25 * authority of your country. 26 * 27 * 28 * History: 29 * 0.0 F1OAT 06.06.98 Begin of work with baycom.c source code V 0.3 30 * 0.1 F1OAT 07.06.98 Add timer polling routine for channel arbitration 31 * 0.2 F6FBB 08.06.98 Added delay after FPGA programming 32 * 0.3 F6FBB 29.07.98 Delayed PTT implementation for dupmode=2 33 * 0.4 F6FBB 30.07.98 Added TxTail, Slottime and Persistence 34 * 0.5 F6FBB 01.08.98 Shared IRQs, /proc/net and network statistics 35 * 0.6 F6FBB 25.08.98 Added 1200Bds format 36 * 0.7 F6FBB 12.09.98 Added to the kernel configuration 37 * 0.8 F6FBB 14.10.98 Fixed slottime/persistence timing bug 38 * OK1ZIA 2.09.01 Fixed "kfree_skb on hard IRQ" 39 * using dev_kfree_skb_any(). (important in 2.4 kernel) 40 * 41 */ 42 43 /*****************************************************************************/ 44 45 #include <linux/module.h> 46 #include <linux/types.h> 47 #include <linux/net.h> 48 #include <linux/in.h> 49 #include <linux/if.h> 50 #include <linux/slab.h> 51 #include <linux/errno.h> 52 #include <linux/bitops.h> 53 #include <linux/random.h> 54 #include <asm/io.h> 55 #include <linux/interrupt.h> 56 #include <linux/ioport.h> 57 #include <linux/firmware.h> 58 #include <linux/platform_device.h> 59 60 #include <linux/netdevice.h> 61 #include <linux/if_arp.h> 62 #include <linux/etherdevice.h> 63 #include <linux/skbuff.h> 64 #include <net/ax25.h> 65 66 #include <linux/kernel.h> 67 #include <linux/proc_fs.h> 68 #include <linux/seq_file.h> 69 #include <net/net_namespace.h> 70 71 #include <linux/uaccess.h> 72 #include <linux/init.h> 73 74 #include <linux/yam.h> 75 76 /* --------------------------------------------------------------------- */ 77 78 static const char yam_drvname[] = "yam"; 79 static const char yam_drvinfo[] __initconst = KERN_INFO \ 80 "YAM driver version 0.8 by F1OAT/F6FBB\n"; 81 82 /* --------------------------------------------------------------------- */ 83 84 #define FIRMWARE_9600 "yam/9600.bin" 85 #define FIRMWARE_1200 "yam/1200.bin" 86 87 #define YAM_9600 1 88 #define YAM_1200 2 89 90 #define NR_PORTS 4 91 #define YAM_MAGIC 0xF10A7654 92 93 /* Transmitter states */ 94 95 #define TX_OFF 0 96 #define TX_HEAD 1 97 #define TX_DATA 2 98 #define TX_CRC1 3 99 #define TX_CRC2 4 100 #define TX_TAIL 5 101 102 #define YAM_MAX_FRAME 1024 103 104 #define DEFAULT_BITRATE 9600 /* bps */ 105 #define DEFAULT_HOLDD 10 /* sec */ 106 #define DEFAULT_TXD 300 /* ms */ 107 #define DEFAULT_TXTAIL 10 /* ms */ 108 #define DEFAULT_SLOT 100 /* ms */ 109 #define DEFAULT_PERS 64 /* 0->255 */ 110 111 struct yam_port { 112 int magic; 113 int bitrate; 114 int baudrate; 115 int iobase; 116 int irq; 117 int dupmode; 118 119 struct net_device *dev; 120 121 int nb_rxint; 122 int nb_mdint; 123 124 /* Parameters section */ 125 126 int txd; /* tx delay */ 127 int holdd; /* duplex ptt delay */ 128 int txtail; /* txtail delay */ 129 int slot; /* slottime */ 130 int pers; /* persistence */ 131 132 /* Tx section */ 133 134 int tx_state; 135 int tx_count; 136 int slotcnt; 137 unsigned char tx_buf[YAM_MAX_FRAME]; 138 int tx_len; 139 int tx_crcl, tx_crch; 140 struct sk_buff_head send_queue; /* Packets awaiting transmission */ 141 142 /* Rx section */ 143 144 int dcd; 145 unsigned char rx_buf[YAM_MAX_FRAME]; 146 int rx_len; 147 int rx_crcl, rx_crch; 148 }; 149 150 struct yam_mcs { 151 unsigned char bits[YAM_FPGA_SIZE]; 152 int bitrate; 153 struct yam_mcs *next; 154 }; 155 156 static struct net_device *yam_devs[NR_PORTS]; 157 158 static struct yam_mcs *yam_data; 159 160 static DEFINE_TIMER(yam_timer, NULL); 161 162 /* --------------------------------------------------------------------- */ 163 164 #define RBR(iobase) (iobase+0) 165 #define THR(iobase) (iobase+0) 166 #define IER(iobase) (iobase+1) 167 #define IIR(iobase) (iobase+2) 168 #define FCR(iobase) (iobase+2) 169 #define LCR(iobase) (iobase+3) 170 #define MCR(iobase) (iobase+4) 171 #define LSR(iobase) (iobase+5) 172 #define MSR(iobase) (iobase+6) 173 #define SCR(iobase) (iobase+7) 174 #define DLL(iobase) (iobase+0) 175 #define DLM(iobase) (iobase+1) 176 177 #define YAM_EXTENT 8 178 179 /* Interrupt Identification Register Bit Masks */ 180 #define IIR_NOPEND 1 181 #define IIR_MSR 0 182 #define IIR_TX 2 183 #define IIR_RX 4 184 #define IIR_LSR 6 185 #define IIR_TIMEOUT 12 /* Fifo mode only */ 186 187 #define IIR_MASK 0x0F 188 189 /* Interrupt Enable Register Bit Masks */ 190 #define IER_RX 1 /* enable rx interrupt */ 191 #define IER_TX 2 /* enable tx interrupt */ 192 #define IER_LSR 4 /* enable line status interrupts */ 193 #define IER_MSR 8 /* enable modem status interrupts */ 194 195 /* Modem Control Register Bit Masks */ 196 #define MCR_DTR 0x01 /* DTR output */ 197 #define MCR_RTS 0x02 /* RTS output */ 198 #define MCR_OUT1 0x04 /* OUT1 output (not accessible in RS232) */ 199 #define MCR_OUT2 0x08 /* Master Interrupt enable (must be set on PCs) */ 200 #define MCR_LOOP 0x10 /* Loopback enable */ 201 202 /* Modem Status Register Bit Masks */ 203 #define MSR_DCTS 0x01 /* Delta CTS input */ 204 #define MSR_DDSR 0x02 /* Delta DSR */ 205 #define MSR_DRIN 0x04 /* Delta RI */ 206 #define MSR_DDCD 0x08 /* Delta DCD */ 207 #define MSR_CTS 0x10 /* CTS input */ 208 #define MSR_DSR 0x20 /* DSR input */ 209 #define MSR_RING 0x40 /* RI input */ 210 #define MSR_DCD 0x80 /* DCD input */ 211 212 /* line status register bit mask */ 213 #define LSR_RXC 0x01 214 #define LSR_OE 0x02 215 #define LSR_PE 0x04 216 #define LSR_FE 0x08 217 #define LSR_BREAK 0x10 218 #define LSR_THRE 0x20 219 #define LSR_TSRE 0x40 220 221 /* Line Control Register Bit Masks */ 222 #define LCR_DLAB 0x80 223 #define LCR_BREAK 0x40 224 #define LCR_PZERO 0x28 225 #define LCR_PEVEN 0x18 226 #define LCR_PODD 0x08 227 #define LCR_STOP1 0x00 228 #define LCR_STOP2 0x04 229 #define LCR_BIT5 0x00 230 #define LCR_BIT6 0x02 231 #define LCR_BIT7 0x01 232 #define LCR_BIT8 0x03 233 234 /* YAM Modem <-> UART Port mapping */ 235 236 #define TX_RDY MSR_DCTS /* transmitter ready to send */ 237 #define RX_DCD MSR_DCD /* carrier detect */ 238 #define RX_FLAG MSR_RING /* hdlc flag received */ 239 #define FPGA_DONE MSR_DSR /* FPGA is configured */ 240 #define PTT_ON (MCR_RTS|MCR_OUT2) /* activate PTT */ 241 #define PTT_OFF (MCR_DTR|MCR_OUT2) /* release PTT */ 242 243 #define ENABLE_RXINT IER_RX /* enable uart rx interrupt during rx */ 244 #define ENABLE_TXINT IER_MSR /* enable uart ms interrupt during tx */ 245 #define ENABLE_RTXINT (IER_RX|IER_MSR) /* full duplex operations */ 246 247 248 /************************************************************************* 249 * CRC Tables 250 ************************************************************************/ 251 252 static const unsigned char chktabl[256] = 253 {0x00, 0x89, 0x12, 0x9b, 0x24, 0xad, 0x36, 0xbf, 0x48, 0xc1, 0x5a, 0xd3, 0x6c, 0xe5, 0x7e, 254 0xf7, 0x81, 0x08, 0x93, 0x1a, 0xa5, 0x2c, 0xb7, 0x3e, 0xc9, 0x40, 0xdb, 0x52, 0xed, 0x64, 255 0xff, 0x76, 0x02, 0x8b, 0x10, 0x99, 0x26, 0xaf, 0x34, 0xbd, 0x4a, 0xc3, 0x58, 0xd1, 0x6e, 256 0xe7, 0x7c, 0xf5, 0x83, 0x0a, 0x91, 0x18, 0xa7, 0x2e, 0xb5, 0x3c, 0xcb, 0x42, 0xd9, 0x50, 257 0xef, 0x66, 0xfd, 0x74, 0x04, 0x8d, 0x16, 0x9f, 0x20, 0xa9, 0x32, 0xbb, 0x4c, 0xc5, 0x5e, 258 0xd7, 0x68, 0xe1, 0x7a, 0xf3, 0x85, 0x0c, 0x97, 0x1e, 0xa1, 0x28, 0xb3, 0x3a, 0xcd, 0x44, 259 0xdf, 0x56, 0xe9, 0x60, 0xfb, 0x72, 0x06, 0x8f, 0x14, 0x9d, 0x22, 0xab, 0x30, 0xb9, 0x4e, 260 0xc7, 0x5c, 0xd5, 0x6a, 0xe3, 0x78, 0xf1, 0x87, 0x0e, 0x95, 0x1c, 0xa3, 0x2a, 0xb1, 0x38, 261 0xcf, 0x46, 0xdd, 0x54, 0xeb, 0x62, 0xf9, 0x70, 0x08, 0x81, 0x1a, 0x93, 0x2c, 0xa5, 0x3e, 262 0xb7, 0x40, 0xc9, 0x52, 0xdb, 0x64, 0xed, 0x76, 0xff, 0x89, 0x00, 0x9b, 0x12, 0xad, 0x24, 263 0xbf, 0x36, 0xc1, 0x48, 0xd3, 0x5a, 0xe5, 0x6c, 0xf7, 0x7e, 0x0a, 0x83, 0x18, 0x91, 0x2e, 264 0xa7, 0x3c, 0xb5, 0x42, 0xcb, 0x50, 0xd9, 0x66, 0xef, 0x74, 0xfd, 0x8b, 0x02, 0x99, 0x10, 265 0xaf, 0x26, 0xbd, 0x34, 0xc3, 0x4a, 0xd1, 0x58, 0xe7, 0x6e, 0xf5, 0x7c, 0x0c, 0x85, 0x1e, 266 0x97, 0x28, 0xa1, 0x3a, 0xb3, 0x44, 0xcd, 0x56, 0xdf, 0x60, 0xe9, 0x72, 0xfb, 0x8d, 0x04, 267 0x9f, 0x16, 0xa9, 0x20, 0xbb, 0x32, 0xc5, 0x4c, 0xd7, 0x5e, 0xe1, 0x68, 0xf3, 0x7a, 0x0e, 268 0x87, 0x1c, 0x95, 0x2a, 0xa3, 0x38, 0xb1, 0x46, 0xcf, 0x54, 0xdd, 0x62, 0xeb, 0x70, 0xf9, 269 0x8f, 0x06, 0x9d, 0x14, 0xab, 0x22, 0xb9, 0x30, 0xc7, 0x4e, 0xd5, 0x5c, 0xe3, 0x6a, 0xf1, 270 0x78}; 271 static const unsigned char chktabh[256] = 272 {0x00, 0x11, 0x23, 0x32, 0x46, 0x57, 0x65, 0x74, 0x8c, 0x9d, 0xaf, 0xbe, 0xca, 0xdb, 0xe9, 273 0xf8, 0x10, 0x01, 0x33, 0x22, 0x56, 0x47, 0x75, 0x64, 0x9c, 0x8d, 0xbf, 0xae, 0xda, 0xcb, 274 0xf9, 0xe8, 0x21, 0x30, 0x02, 0x13, 0x67, 0x76, 0x44, 0x55, 0xad, 0xbc, 0x8e, 0x9f, 0xeb, 275 0xfa, 0xc8, 0xd9, 0x31, 0x20, 0x12, 0x03, 0x77, 0x66, 0x54, 0x45, 0xbd, 0xac, 0x9e, 0x8f, 276 0xfb, 0xea, 0xd8, 0xc9, 0x42, 0x53, 0x61, 0x70, 0x04, 0x15, 0x27, 0x36, 0xce, 0xdf, 0xed, 277 0xfc, 0x88, 0x99, 0xab, 0xba, 0x52, 0x43, 0x71, 0x60, 0x14, 0x05, 0x37, 0x26, 0xde, 0xcf, 278 0xfd, 0xec, 0x98, 0x89, 0xbb, 0xaa, 0x63, 0x72, 0x40, 0x51, 0x25, 0x34, 0x06, 0x17, 0xef, 279 0xfe, 0xcc, 0xdd, 0xa9, 0xb8, 0x8a, 0x9b, 0x73, 0x62, 0x50, 0x41, 0x35, 0x24, 0x16, 0x07, 280 0xff, 0xee, 0xdc, 0xcd, 0xb9, 0xa8, 0x9a, 0x8b, 0x84, 0x95, 0xa7, 0xb6, 0xc2, 0xd3, 0xe1, 281 0xf0, 0x08, 0x19, 0x2b, 0x3a, 0x4e, 0x5f, 0x6d, 0x7c, 0x94, 0x85, 0xb7, 0xa6, 0xd2, 0xc3, 282 0xf1, 0xe0, 0x18, 0x09, 0x3b, 0x2a, 0x5e, 0x4f, 0x7d, 0x6c, 0xa5, 0xb4, 0x86, 0x97, 0xe3, 283 0xf2, 0xc0, 0xd1, 0x29, 0x38, 0x0a, 0x1b, 0x6f, 0x7e, 0x4c, 0x5d, 0xb5, 0xa4, 0x96, 0x87, 284 0xf3, 0xe2, 0xd0, 0xc1, 0x39, 0x28, 0x1a, 0x0b, 0x7f, 0x6e, 0x5c, 0x4d, 0xc6, 0xd7, 0xe5, 285 0xf4, 0x80, 0x91, 0xa3, 0xb2, 0x4a, 0x5b, 0x69, 0x78, 0x0c, 0x1d, 0x2f, 0x3e, 0xd6, 0xc7, 286 0xf5, 0xe4, 0x90, 0x81, 0xb3, 0xa2, 0x5a, 0x4b, 0x79, 0x68, 0x1c, 0x0d, 0x3f, 0x2e, 0xe7, 287 0xf6, 0xc4, 0xd5, 0xa1, 0xb0, 0x82, 0x93, 0x6b, 0x7a, 0x48, 0x59, 0x2d, 0x3c, 0x0e, 0x1f, 288 0xf7, 0xe6, 0xd4, 0xc5, 0xb1, 0xa0, 0x92, 0x83, 0x7b, 0x6a, 0x58, 0x49, 0x3d, 0x2c, 0x1e, 289 0x0f}; 290 291 /************************************************************************* 292 * FPGA functions 293 ************************************************************************/ 294 295 static void delay(int ms) 296 { 297 unsigned long timeout = jiffies + ((ms * HZ) / 1000); 298 while (time_before(jiffies, timeout)) 299 cpu_relax(); 300 } 301 302 /* 303 * reset FPGA 304 */ 305 306 static void fpga_reset(int iobase) 307 { 308 outb(0, IER(iobase)); 309 outb(LCR_DLAB | LCR_BIT5, LCR(iobase)); 310 outb(1, DLL(iobase)); 311 outb(0, DLM(iobase)); 312 313 outb(LCR_BIT5, LCR(iobase)); 314 inb(LSR(iobase)); 315 inb(MSR(iobase)); 316 /* turn off FPGA supply voltage */ 317 outb(MCR_OUT1 | MCR_OUT2, MCR(iobase)); 318 delay(100); 319 /* turn on FPGA supply voltage again */ 320 outb(MCR_DTR | MCR_RTS | MCR_OUT1 | MCR_OUT2, MCR(iobase)); 321 delay(100); 322 } 323 324 /* 325 * send one byte to FPGA 326 */ 327 328 static int fpga_write(int iobase, unsigned char wrd) 329 { 330 unsigned char bit; 331 int k; 332 unsigned long timeout = jiffies + HZ / 10; 333 334 for (k = 0; k < 8; k++) { 335 bit = (wrd & 0x80) ? (MCR_RTS | MCR_DTR) : MCR_DTR; 336 outb(bit | MCR_OUT1 | MCR_OUT2, MCR(iobase)); 337 wrd <<= 1; 338 outb(0xfc, THR(iobase)); 339 while ((inb(LSR(iobase)) & LSR_TSRE) == 0) 340 if (time_after(jiffies, timeout)) 341 return -1; 342 } 343 344 return 0; 345 } 346 347 /* 348 * predef should be 0 for loading user defined mcs 349 * predef should be YAM_1200 for loading predef 1200 mcs 350 * predef should be YAM_9600 for loading predef 9600 mcs 351 */ 352 static unsigned char *add_mcs(unsigned char *bits, int bitrate, 353 unsigned int predef) 354 { 355 const char *fw_name[2] = {FIRMWARE_9600, FIRMWARE_1200}; 356 const struct firmware *fw; 357 struct platform_device *pdev; 358 struct yam_mcs *p; 359 int err; 360 361 switch (predef) { 362 case 0: 363 fw = NULL; 364 break; 365 case YAM_1200: 366 case YAM_9600: 367 predef--; 368 pdev = platform_device_register_simple("yam", 0, NULL, 0); 369 if (IS_ERR(pdev)) { 370 printk(KERN_ERR "yam: Failed to register firmware\n"); 371 return NULL; 372 } 373 err = request_firmware(&fw, fw_name[predef], &pdev->dev); 374 platform_device_unregister(pdev); 375 if (err) { 376 printk(KERN_ERR "Failed to load firmware \"%s\"\n", 377 fw_name[predef]); 378 return NULL; 379 } 380 if (fw->size != YAM_FPGA_SIZE) { 381 printk(KERN_ERR "Bogus length %zu in firmware \"%s\"\n", 382 fw->size, fw_name[predef]); 383 release_firmware(fw); 384 return NULL; 385 } 386 bits = (unsigned char *)fw->data; 387 break; 388 default: 389 printk(KERN_ERR "yam: Invalid predef number %u\n", predef); 390 return NULL; 391 } 392 393 /* If it already exists, replace the bit data */ 394 p = yam_data; 395 while (p) { 396 if (p->bitrate == bitrate) { 397 memcpy(p->bits, bits, YAM_FPGA_SIZE); 398 goto out; 399 } 400 p = p->next; 401 } 402 403 /* Allocate a new mcs */ 404 if ((p = kmalloc(sizeof(struct yam_mcs), GFP_KERNEL)) == NULL) { 405 release_firmware(fw); 406 return NULL; 407 } 408 memcpy(p->bits, bits, YAM_FPGA_SIZE); 409 p->bitrate = bitrate; 410 p->next = yam_data; 411 yam_data = p; 412 out: 413 release_firmware(fw); 414 return p->bits; 415 } 416 417 static unsigned char *get_mcs(int bitrate) 418 { 419 struct yam_mcs *p; 420 421 p = yam_data; 422 while (p) { 423 if (p->bitrate == bitrate) 424 return p->bits; 425 p = p->next; 426 } 427 428 /* Load predefined mcs data */ 429 switch (bitrate) { 430 case 1200: 431 /* setting predef as YAM_1200 for loading predef 1200 mcs */ 432 return add_mcs(NULL, bitrate, YAM_1200); 433 default: 434 /* setting predef as YAM_9600 for loading predef 9600 mcs */ 435 return add_mcs(NULL, bitrate, YAM_9600); 436 } 437 } 438 439 /* 440 * download bitstream to FPGA 441 * data is contained in bits[] array in yam1200.h resp. yam9600.h 442 */ 443 444 static int fpga_download(int iobase, int bitrate) 445 { 446 int i, rc; 447 unsigned char *pbits; 448 449 pbits = get_mcs(bitrate); 450 if (pbits == NULL) 451 return -1; 452 453 fpga_reset(iobase); 454 for (i = 0; i < YAM_FPGA_SIZE; i++) { 455 if (fpga_write(iobase, pbits[i])) { 456 printk(KERN_ERR "yam: error in write cycle\n"); 457 return -1; /* write... */ 458 } 459 } 460 461 fpga_write(iobase, 0xFF); 462 rc = inb(MSR(iobase)); /* check DONE signal */ 463 464 /* Needed for some hardwares */ 465 delay(50); 466 467 return (rc & MSR_DSR) ? 0 : -1; 468 } 469 470 471 /************************************************************************ 472 * Serial port init 473 ************************************************************************/ 474 475 static void yam_set_uart(struct net_device *dev) 476 { 477 struct yam_port *yp = netdev_priv(dev); 478 int divisor = 115200 / yp->baudrate; 479 480 outb(0, IER(dev->base_addr)); 481 outb(LCR_DLAB | LCR_BIT8, LCR(dev->base_addr)); 482 outb(divisor, DLL(dev->base_addr)); 483 outb(0, DLM(dev->base_addr)); 484 outb(LCR_BIT8, LCR(dev->base_addr)); 485 outb(PTT_OFF, MCR(dev->base_addr)); 486 outb(0x00, FCR(dev->base_addr)); 487 488 /* Flush pending irq */ 489 490 inb(RBR(dev->base_addr)); 491 inb(MSR(dev->base_addr)); 492 493 /* Enable rx irq */ 494 495 outb(ENABLE_RTXINT, IER(dev->base_addr)); 496 } 497 498 499 /* --------------------------------------------------------------------- */ 500 501 enum uart { 502 c_uart_unknown, c_uart_8250, 503 c_uart_16450, c_uart_16550, c_uart_16550A 504 }; 505 506 static const char *uart_str[] = 507 {"unknown", "8250", "16450", "16550", "16550A"}; 508 509 static enum uart yam_check_uart(unsigned int iobase) 510 { 511 unsigned char b1, b2, b3; 512 enum uart u; 513 enum uart uart_tab[] = 514 {c_uart_16450, c_uart_unknown, c_uart_16550, c_uart_16550A}; 515 516 b1 = inb(MCR(iobase)); 517 outb(b1 | 0x10, MCR(iobase)); /* loopback mode */ 518 b2 = inb(MSR(iobase)); 519 outb(0x1a, MCR(iobase)); 520 b3 = inb(MSR(iobase)) & 0xf0; 521 outb(b1, MCR(iobase)); /* restore old values */ 522 outb(b2, MSR(iobase)); 523 if (b3 != 0x90) 524 return c_uart_unknown; 525 inb(RBR(iobase)); 526 inb(RBR(iobase)); 527 outb(0x01, FCR(iobase)); /* enable FIFOs */ 528 u = uart_tab[(inb(IIR(iobase)) >> 6) & 3]; 529 if (u == c_uart_16450) { 530 outb(0x5a, SCR(iobase)); 531 b1 = inb(SCR(iobase)); 532 outb(0xa5, SCR(iobase)); 533 b2 = inb(SCR(iobase)); 534 if ((b1 != 0x5a) || (b2 != 0xa5)) 535 u = c_uart_8250; 536 } 537 return u; 538 } 539 540 /****************************************************************************** 541 * Rx Section 542 ******************************************************************************/ 543 static inline void yam_rx_flag(struct net_device *dev, struct yam_port *yp) 544 { 545 if (yp->dcd && yp->rx_len >= 3 && yp->rx_len < YAM_MAX_FRAME) { 546 int pkt_len = yp->rx_len - 2 + 1; /* -CRC + kiss */ 547 struct sk_buff *skb; 548 549 if ((yp->rx_crch & yp->rx_crcl) != 0xFF) { 550 /* Bad crc */ 551 } else { 552 if (!(skb = dev_alloc_skb(pkt_len))) { 553 printk(KERN_WARNING "%s: memory squeeze, dropping packet\n", dev->name); 554 ++dev->stats.rx_dropped; 555 } else { 556 unsigned char *cp; 557 cp = skb_put(skb, pkt_len); 558 *cp++ = 0; /* KISS kludge */ 559 memcpy(cp, yp->rx_buf, pkt_len - 1); 560 skb->protocol = ax25_type_trans(skb, dev); 561 netif_rx(skb); 562 ++dev->stats.rx_packets; 563 } 564 } 565 } 566 yp->rx_len = 0; 567 yp->rx_crcl = 0x21; 568 yp->rx_crch = 0xf3; 569 } 570 571 static inline void yam_rx_byte(struct net_device *dev, struct yam_port *yp, unsigned char rxb) 572 { 573 if (yp->rx_len < YAM_MAX_FRAME) { 574 unsigned char c = yp->rx_crcl; 575 yp->rx_crcl = (chktabl[c] ^ yp->rx_crch); 576 yp->rx_crch = (chktabh[c] ^ rxb); 577 yp->rx_buf[yp->rx_len++] = rxb; 578 } 579 } 580 581 /******************************************************************************** 582 * TX Section 583 ********************************************************************************/ 584 585 static void ptt_on(struct net_device *dev) 586 { 587 outb(PTT_ON, MCR(dev->base_addr)); 588 } 589 590 static void ptt_off(struct net_device *dev) 591 { 592 outb(PTT_OFF, MCR(dev->base_addr)); 593 } 594 595 static netdev_tx_t yam_send_packet(struct sk_buff *skb, 596 struct net_device *dev) 597 { 598 struct yam_port *yp = netdev_priv(dev); 599 600 if (skb->protocol == htons(ETH_P_IP)) 601 return ax25_ip_xmit(skb); 602 603 skb_queue_tail(&yp->send_queue, skb); 604 netif_trans_update(dev); 605 return NETDEV_TX_OK; 606 } 607 608 static void yam_start_tx(struct net_device *dev, struct yam_port *yp) 609 { 610 if ((yp->tx_state == TX_TAIL) || (yp->txd == 0)) 611 yp->tx_count = 1; 612 else 613 yp->tx_count = (yp->bitrate * yp->txd) / 8000; 614 yp->tx_state = TX_HEAD; 615 ptt_on(dev); 616 } 617 618 static void yam_arbitrate(struct net_device *dev) 619 { 620 struct yam_port *yp = netdev_priv(dev); 621 622 if (yp->magic != YAM_MAGIC || yp->tx_state != TX_OFF || 623 skb_queue_empty(&yp->send_queue)) 624 return; 625 /* tx_state is TX_OFF and there is data to send */ 626 627 if (yp->dupmode) { 628 /* Full duplex mode, don't wait */ 629 yam_start_tx(dev, yp); 630 return; 631 } 632 if (yp->dcd) { 633 /* DCD on, wait slotime ... */ 634 yp->slotcnt = yp->slot / 10; 635 return; 636 } 637 /* Is slottime passed ? */ 638 if ((--yp->slotcnt) > 0) 639 return; 640 641 yp->slotcnt = yp->slot / 10; 642 643 /* is random > persist ? */ 644 if ((prandom_u32() % 256) > yp->pers) 645 return; 646 647 yam_start_tx(dev, yp); 648 } 649 650 static void yam_dotimer(struct timer_list *unused) 651 { 652 int i; 653 654 for (i = 0; i < NR_PORTS; i++) { 655 struct net_device *dev = yam_devs[i]; 656 if (dev && netif_running(dev)) 657 yam_arbitrate(dev); 658 } 659 yam_timer.expires = jiffies + HZ / 100; 660 add_timer(&yam_timer); 661 } 662 663 static void yam_tx_byte(struct net_device *dev, struct yam_port *yp) 664 { 665 struct sk_buff *skb; 666 unsigned char b, temp; 667 668 switch (yp->tx_state) { 669 case TX_OFF: 670 break; 671 case TX_HEAD: 672 if (--yp->tx_count <= 0) { 673 if (!(skb = skb_dequeue(&yp->send_queue))) { 674 ptt_off(dev); 675 yp->tx_state = TX_OFF; 676 break; 677 } 678 yp->tx_state = TX_DATA; 679 if (skb->data[0] != 0) { 680 /* do_kiss_params(s, skb->data, skb->len); */ 681 dev_kfree_skb_any(skb); 682 break; 683 } 684 yp->tx_len = skb->len - 1; /* strip KISS byte */ 685 if (yp->tx_len >= YAM_MAX_FRAME || yp->tx_len < 2) { 686 dev_kfree_skb_any(skb); 687 break; 688 } 689 skb_copy_from_linear_data_offset(skb, 1, 690 yp->tx_buf, 691 yp->tx_len); 692 dev_kfree_skb_any(skb); 693 yp->tx_count = 0; 694 yp->tx_crcl = 0x21; 695 yp->tx_crch = 0xf3; 696 yp->tx_state = TX_DATA; 697 } 698 break; 699 case TX_DATA: 700 b = yp->tx_buf[yp->tx_count++]; 701 outb(b, THR(dev->base_addr)); 702 temp = yp->tx_crcl; 703 yp->tx_crcl = chktabl[temp] ^ yp->tx_crch; 704 yp->tx_crch = chktabh[temp] ^ b; 705 if (yp->tx_count >= yp->tx_len) { 706 yp->tx_state = TX_CRC1; 707 } 708 break; 709 case TX_CRC1: 710 yp->tx_crch = chktabl[yp->tx_crcl] ^ yp->tx_crch; 711 yp->tx_crcl = chktabh[yp->tx_crcl] ^ chktabl[yp->tx_crch] ^ 0xff; 712 outb(yp->tx_crcl, THR(dev->base_addr)); 713 yp->tx_state = TX_CRC2; 714 break; 715 case TX_CRC2: 716 outb(chktabh[yp->tx_crch] ^ 0xFF, THR(dev->base_addr)); 717 if (skb_queue_empty(&yp->send_queue)) { 718 yp->tx_count = (yp->bitrate * yp->txtail) / 8000; 719 if (yp->dupmode == 2) 720 yp->tx_count += (yp->bitrate * yp->holdd) / 8; 721 if (yp->tx_count == 0) 722 yp->tx_count = 1; 723 yp->tx_state = TX_TAIL; 724 } else { 725 yp->tx_count = 1; 726 yp->tx_state = TX_HEAD; 727 } 728 ++dev->stats.tx_packets; 729 break; 730 case TX_TAIL: 731 if (--yp->tx_count <= 0) { 732 yp->tx_state = TX_OFF; 733 ptt_off(dev); 734 } 735 break; 736 } 737 } 738 739 /*********************************************************************************** 740 * ISR routine 741 ************************************************************************************/ 742 743 static irqreturn_t yam_interrupt(int irq, void *dev_id) 744 { 745 struct net_device *dev; 746 struct yam_port *yp; 747 unsigned char iir; 748 int counter = 100; 749 int i; 750 int handled = 0; 751 752 for (i = 0; i < NR_PORTS; i++) { 753 dev = yam_devs[i]; 754 yp = netdev_priv(dev); 755 756 if (!netif_running(dev)) 757 continue; 758 759 while ((iir = IIR_MASK & inb(IIR(dev->base_addr))) != IIR_NOPEND) { 760 unsigned char msr = inb(MSR(dev->base_addr)); 761 unsigned char lsr = inb(LSR(dev->base_addr)); 762 unsigned char rxb; 763 764 handled = 1; 765 766 if (lsr & LSR_OE) 767 ++dev->stats.rx_fifo_errors; 768 769 yp->dcd = (msr & RX_DCD) ? 1 : 0; 770 771 if (--counter <= 0) { 772 printk(KERN_ERR "%s: too many irq iir=%d\n", 773 dev->name, iir); 774 goto out; 775 } 776 if (msr & TX_RDY) { 777 ++yp->nb_mdint; 778 yam_tx_byte(dev, yp); 779 } 780 if (lsr & LSR_RXC) { 781 ++yp->nb_rxint; 782 rxb = inb(RBR(dev->base_addr)); 783 if (msr & RX_FLAG) 784 yam_rx_flag(dev, yp); 785 else 786 yam_rx_byte(dev, yp, rxb); 787 } 788 } 789 } 790 out: 791 return IRQ_RETVAL(handled); 792 } 793 794 #ifdef CONFIG_PROC_FS 795 796 static void *yam_seq_start(struct seq_file *seq, loff_t *pos) 797 { 798 return (*pos < NR_PORTS) ? yam_devs[*pos] : NULL; 799 } 800 801 static void *yam_seq_next(struct seq_file *seq, void *v, loff_t *pos) 802 { 803 ++*pos; 804 return (*pos < NR_PORTS) ? yam_devs[*pos] : NULL; 805 } 806 807 static void yam_seq_stop(struct seq_file *seq, void *v) 808 { 809 } 810 811 static int yam_seq_show(struct seq_file *seq, void *v) 812 { 813 struct net_device *dev = v; 814 const struct yam_port *yp = netdev_priv(dev); 815 816 seq_printf(seq, "Device %s\n", dev->name); 817 seq_printf(seq, " Up %d\n", netif_running(dev)); 818 seq_printf(seq, " Speed %u\n", yp->bitrate); 819 seq_printf(seq, " IoBase 0x%x\n", yp->iobase); 820 seq_printf(seq, " BaudRate %u\n", yp->baudrate); 821 seq_printf(seq, " IRQ %u\n", yp->irq); 822 seq_printf(seq, " TxState %u\n", yp->tx_state); 823 seq_printf(seq, " Duplex %u\n", yp->dupmode); 824 seq_printf(seq, " HoldDly %u\n", yp->holdd); 825 seq_printf(seq, " TxDelay %u\n", yp->txd); 826 seq_printf(seq, " TxTail %u\n", yp->txtail); 827 seq_printf(seq, " SlotTime %u\n", yp->slot); 828 seq_printf(seq, " Persist %u\n", yp->pers); 829 seq_printf(seq, " TxFrames %lu\n", dev->stats.tx_packets); 830 seq_printf(seq, " RxFrames %lu\n", dev->stats.rx_packets); 831 seq_printf(seq, " TxInt %u\n", yp->nb_mdint); 832 seq_printf(seq, " RxInt %u\n", yp->nb_rxint); 833 seq_printf(seq, " RxOver %lu\n", dev->stats.rx_fifo_errors); 834 seq_printf(seq, "\n"); 835 return 0; 836 } 837 838 static const struct seq_operations yam_seqops = { 839 .start = yam_seq_start, 840 .next = yam_seq_next, 841 .stop = yam_seq_stop, 842 .show = yam_seq_show, 843 }; 844 845 static int yam_info_open(struct inode *inode, struct file *file) 846 { 847 return seq_open(file, &yam_seqops); 848 } 849 850 static const struct file_operations yam_info_fops = { 851 .owner = THIS_MODULE, 852 .open = yam_info_open, 853 .read = seq_read, 854 .llseek = seq_lseek, 855 .release = seq_release, 856 }; 857 858 #endif 859 860 861 /* --------------------------------------------------------------------- */ 862 863 static int yam_open(struct net_device *dev) 864 { 865 struct yam_port *yp = netdev_priv(dev); 866 enum uart u; 867 int i; 868 int ret=0; 869 870 printk(KERN_INFO "Trying %s at iobase 0x%lx irq %u\n", dev->name, dev->base_addr, dev->irq); 871 872 if (!yp->bitrate) 873 return -ENXIO; 874 if (!dev->base_addr || dev->base_addr > 0x1000 - YAM_EXTENT || 875 dev->irq < 2 || dev->irq > 15) { 876 return -ENXIO; 877 } 878 if (!request_region(dev->base_addr, YAM_EXTENT, dev->name)) 879 { 880 printk(KERN_ERR "%s: cannot 0x%lx busy\n", dev->name, dev->base_addr); 881 return -EACCES; 882 } 883 if ((u = yam_check_uart(dev->base_addr)) == c_uart_unknown) { 884 printk(KERN_ERR "%s: cannot find uart type\n", dev->name); 885 ret = -EIO; 886 goto out_release_base; 887 } 888 if (fpga_download(dev->base_addr, yp->bitrate)) { 889 printk(KERN_ERR "%s: cannot init FPGA\n", dev->name); 890 ret = -EIO; 891 goto out_release_base; 892 } 893 outb(0, IER(dev->base_addr)); 894 if (request_irq(dev->irq, yam_interrupt, IRQF_SHARED, dev->name, dev)) { 895 printk(KERN_ERR "%s: irq %d busy\n", dev->name, dev->irq); 896 ret = -EBUSY; 897 goto out_release_base; 898 } 899 900 yam_set_uart(dev); 901 902 netif_start_queue(dev); 903 904 yp->slotcnt = yp->slot / 10; 905 906 /* Reset overruns for all ports - FPGA programming makes overruns */ 907 for (i = 0; i < NR_PORTS; i++) { 908 struct net_device *yam_dev = yam_devs[i]; 909 910 inb(LSR(yam_dev->base_addr)); 911 yam_dev->stats.rx_fifo_errors = 0; 912 } 913 914 printk(KERN_INFO "%s at iobase 0x%lx irq %u uart %s\n", dev->name, dev->base_addr, dev->irq, 915 uart_str[u]); 916 return 0; 917 918 out_release_base: 919 release_region(dev->base_addr, YAM_EXTENT); 920 return ret; 921 } 922 923 /* --------------------------------------------------------------------- */ 924 925 static int yam_close(struct net_device *dev) 926 { 927 struct sk_buff *skb; 928 struct yam_port *yp = netdev_priv(dev); 929 930 if (!dev) 931 return -EINVAL; 932 933 /* 934 * disable interrupts 935 */ 936 outb(0, IER(dev->base_addr)); 937 outb(1, MCR(dev->base_addr)); 938 /* Remove IRQ handler if last */ 939 free_irq(dev->irq,dev); 940 release_region(dev->base_addr, YAM_EXTENT); 941 netif_stop_queue(dev); 942 while ((skb = skb_dequeue(&yp->send_queue))) 943 dev_kfree_skb(skb); 944 945 printk(KERN_INFO "%s: close yam at iobase 0x%lx irq %u\n", 946 yam_drvname, dev->base_addr, dev->irq); 947 return 0; 948 } 949 950 /* --------------------------------------------------------------------- */ 951 952 static int yam_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 953 { 954 struct yam_port *yp = netdev_priv(dev); 955 struct yamdrv_ioctl_cfg yi; 956 struct yamdrv_ioctl_mcs *ym; 957 int ioctl_cmd; 958 959 if (copy_from_user(&ioctl_cmd, ifr->ifr_data, sizeof(int))) 960 return -EFAULT; 961 962 if (yp->magic != YAM_MAGIC) 963 return -EINVAL; 964 965 if (!capable(CAP_NET_ADMIN)) 966 return -EPERM; 967 968 if (cmd != SIOCDEVPRIVATE) 969 return -EINVAL; 970 971 switch (ioctl_cmd) { 972 973 case SIOCYAMRESERVED: 974 return -EINVAL; /* unused */ 975 976 case SIOCYAMSMCS: 977 if (netif_running(dev)) 978 return -EINVAL; /* Cannot change this parameter when up */ 979 ym = memdup_user(ifr->ifr_data, 980 sizeof(struct yamdrv_ioctl_mcs)); 981 if (IS_ERR(ym)) 982 return PTR_ERR(ym); 983 if (ym->bitrate > YAM_MAXBITRATE) { 984 kfree(ym); 985 return -EINVAL; 986 } 987 /* setting predef as 0 for loading userdefined mcs data */ 988 add_mcs(ym->bits, ym->bitrate, 0); 989 kfree(ym); 990 break; 991 992 case SIOCYAMSCFG: 993 if (!capable(CAP_SYS_RAWIO)) 994 return -EPERM; 995 if (copy_from_user(&yi, ifr->ifr_data, sizeof(struct yamdrv_ioctl_cfg))) 996 return -EFAULT; 997 998 if ((yi.cfg.mask & YAM_IOBASE) && netif_running(dev)) 999 return -EINVAL; /* Cannot change this parameter when up */ 1000 if ((yi.cfg.mask & YAM_IRQ) && netif_running(dev)) 1001 return -EINVAL; /* Cannot change this parameter when up */ 1002 if ((yi.cfg.mask & YAM_BITRATE) && netif_running(dev)) 1003 return -EINVAL; /* Cannot change this parameter when up */ 1004 if ((yi.cfg.mask & YAM_BAUDRATE) && netif_running(dev)) 1005 return -EINVAL; /* Cannot change this parameter when up */ 1006 1007 if (yi.cfg.mask & YAM_IOBASE) { 1008 yp->iobase = yi.cfg.iobase; 1009 dev->base_addr = yi.cfg.iobase; 1010 } 1011 if (yi.cfg.mask & YAM_IRQ) { 1012 if (yi.cfg.irq > 15) 1013 return -EINVAL; 1014 yp->irq = yi.cfg.irq; 1015 dev->irq = yi.cfg.irq; 1016 } 1017 if (yi.cfg.mask & YAM_BITRATE) { 1018 if (yi.cfg.bitrate > YAM_MAXBITRATE) 1019 return -EINVAL; 1020 yp->bitrate = yi.cfg.bitrate; 1021 } 1022 if (yi.cfg.mask & YAM_BAUDRATE) { 1023 if (yi.cfg.baudrate > YAM_MAXBAUDRATE) 1024 return -EINVAL; 1025 yp->baudrate = yi.cfg.baudrate; 1026 } 1027 if (yi.cfg.mask & YAM_MODE) { 1028 if (yi.cfg.mode > YAM_MAXMODE) 1029 return -EINVAL; 1030 yp->dupmode = yi.cfg.mode; 1031 } 1032 if (yi.cfg.mask & YAM_HOLDDLY) { 1033 if (yi.cfg.holddly > YAM_MAXHOLDDLY) 1034 return -EINVAL; 1035 yp->holdd = yi.cfg.holddly; 1036 } 1037 if (yi.cfg.mask & YAM_TXDELAY) { 1038 if (yi.cfg.txdelay > YAM_MAXTXDELAY) 1039 return -EINVAL; 1040 yp->txd = yi.cfg.txdelay; 1041 } 1042 if (yi.cfg.mask & YAM_TXTAIL) { 1043 if (yi.cfg.txtail > YAM_MAXTXTAIL) 1044 return -EINVAL; 1045 yp->txtail = yi.cfg.txtail; 1046 } 1047 if (yi.cfg.mask & YAM_PERSIST) { 1048 if (yi.cfg.persist > YAM_MAXPERSIST) 1049 return -EINVAL; 1050 yp->pers = yi.cfg.persist; 1051 } 1052 if (yi.cfg.mask & YAM_SLOTTIME) { 1053 if (yi.cfg.slottime > YAM_MAXSLOTTIME) 1054 return -EINVAL; 1055 yp->slot = yi.cfg.slottime; 1056 yp->slotcnt = yp->slot / 10; 1057 } 1058 break; 1059 1060 case SIOCYAMGCFG: 1061 memset(&yi, 0, sizeof(yi)); 1062 yi.cfg.mask = 0xffffffff; 1063 yi.cfg.iobase = yp->iobase; 1064 yi.cfg.irq = yp->irq; 1065 yi.cfg.bitrate = yp->bitrate; 1066 yi.cfg.baudrate = yp->baudrate; 1067 yi.cfg.mode = yp->dupmode; 1068 yi.cfg.txdelay = yp->txd; 1069 yi.cfg.holddly = yp->holdd; 1070 yi.cfg.txtail = yp->txtail; 1071 yi.cfg.persist = yp->pers; 1072 yi.cfg.slottime = yp->slot; 1073 if (copy_to_user(ifr->ifr_data, &yi, sizeof(struct yamdrv_ioctl_cfg))) 1074 return -EFAULT; 1075 break; 1076 1077 default: 1078 return -EINVAL; 1079 1080 } 1081 1082 return 0; 1083 } 1084 1085 /* --------------------------------------------------------------------- */ 1086 1087 static int yam_set_mac_address(struct net_device *dev, void *addr) 1088 { 1089 struct sockaddr *sa = (struct sockaddr *) addr; 1090 1091 /* addr is an AX.25 shifted ASCII mac address */ 1092 memcpy(dev->dev_addr, sa->sa_data, dev->addr_len); 1093 return 0; 1094 } 1095 1096 /* --------------------------------------------------------------------- */ 1097 1098 static const struct net_device_ops yam_netdev_ops = { 1099 .ndo_open = yam_open, 1100 .ndo_stop = yam_close, 1101 .ndo_start_xmit = yam_send_packet, 1102 .ndo_do_ioctl = yam_ioctl, 1103 .ndo_set_mac_address = yam_set_mac_address, 1104 }; 1105 1106 static void yam_setup(struct net_device *dev) 1107 { 1108 struct yam_port *yp = netdev_priv(dev); 1109 1110 yp->magic = YAM_MAGIC; 1111 yp->bitrate = DEFAULT_BITRATE; 1112 yp->baudrate = DEFAULT_BITRATE * 2; 1113 yp->iobase = 0; 1114 yp->irq = 0; 1115 yp->dupmode = 0; 1116 yp->holdd = DEFAULT_HOLDD; 1117 yp->txd = DEFAULT_TXD; 1118 yp->txtail = DEFAULT_TXTAIL; 1119 yp->slot = DEFAULT_SLOT; 1120 yp->pers = DEFAULT_PERS; 1121 yp->dev = dev; 1122 1123 dev->base_addr = yp->iobase; 1124 dev->irq = yp->irq; 1125 1126 skb_queue_head_init(&yp->send_queue); 1127 1128 dev->netdev_ops = &yam_netdev_ops; 1129 dev->header_ops = &ax25_header_ops; 1130 1131 dev->type = ARPHRD_AX25; 1132 dev->hard_header_len = AX25_MAX_HEADER_LEN; 1133 dev->mtu = AX25_MTU; 1134 dev->addr_len = AX25_ADDR_LEN; 1135 memcpy(dev->broadcast, &ax25_bcast, AX25_ADDR_LEN); 1136 memcpy(dev->dev_addr, &ax25_defaddr, AX25_ADDR_LEN); 1137 } 1138 1139 static int __init yam_init_driver(void) 1140 { 1141 struct net_device *dev; 1142 int i, err; 1143 char name[IFNAMSIZ]; 1144 1145 printk(yam_drvinfo); 1146 1147 for (i = 0; i < NR_PORTS; i++) { 1148 sprintf(name, "yam%d", i); 1149 1150 dev = alloc_netdev(sizeof(struct yam_port), name, 1151 NET_NAME_UNKNOWN, yam_setup); 1152 if (!dev) { 1153 pr_err("yam: cannot allocate net device\n"); 1154 err = -ENOMEM; 1155 goto error; 1156 } 1157 1158 err = register_netdev(dev); 1159 if (err) { 1160 printk(KERN_WARNING "yam: cannot register net device %s\n", dev->name); 1161 goto error; 1162 } 1163 yam_devs[i] = dev; 1164 1165 } 1166 1167 timer_setup(&yam_timer, yam_dotimer, 0); 1168 yam_timer.expires = jiffies + HZ / 100; 1169 add_timer(&yam_timer); 1170 1171 proc_create("yam", S_IRUGO, init_net.proc_net, &yam_info_fops); 1172 return 0; 1173 error: 1174 while (--i >= 0) { 1175 unregister_netdev(yam_devs[i]); 1176 free_netdev(yam_devs[i]); 1177 } 1178 return err; 1179 } 1180 1181 /* --------------------------------------------------------------------- */ 1182 1183 static void __exit yam_cleanup_driver(void) 1184 { 1185 struct yam_mcs *p; 1186 int i; 1187 1188 del_timer_sync(&yam_timer); 1189 for (i = 0; i < NR_PORTS; i++) { 1190 struct net_device *dev = yam_devs[i]; 1191 if (dev) { 1192 unregister_netdev(dev); 1193 free_netdev(dev); 1194 } 1195 } 1196 1197 while (yam_data) { 1198 p = yam_data; 1199 yam_data = yam_data->next; 1200 kfree(p); 1201 } 1202 1203 remove_proc_entry("yam", init_net.proc_net); 1204 } 1205 1206 /* --------------------------------------------------------------------- */ 1207 1208 MODULE_AUTHOR("Frederic Rible F1OAT frible@teaser.fr"); 1209 MODULE_DESCRIPTION("Yam amateur radio modem driver"); 1210 MODULE_LICENSE("GPL"); 1211 MODULE_FIRMWARE(FIRMWARE_1200); 1212 MODULE_FIRMWARE(FIRMWARE_9600); 1213 1214 module_init(yam_init_driver); 1215 module_exit(yam_cleanup_driver); 1216 1217 /* --------------------------------------------------------------------- */ 1218 1219