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Linux 3.4.102
[linux/fpc-iii.git] / drivers / net / hamradio / yam.c
blobd8faeb628aa762aed379167921e4364de072a96f
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 <asm/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[] __initdata = 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, 0, 0);
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 skb_queue_tail(&yp->send_queue, skb);
601 dev->trans_start = jiffies;
602 return NETDEV_TX_OK;
603 }
604
605 static void yam_start_tx(struct net_device *dev, struct yam_port *yp)
606 {
607 if ((yp->tx_state == TX_TAIL) || (yp->txd == 0))
608 yp->tx_count = 1;
609 else
610 yp->tx_count = (yp->bitrate * yp->txd) / 8000;
611 yp->tx_state = TX_HEAD;
612 ptt_on(dev);
613 }
614
615 static void yam_arbitrate(struct net_device *dev)
616 {
617 struct yam_port *yp = netdev_priv(dev);
618
619 if (yp->magic != YAM_MAGIC || yp->tx_state != TX_OFF ||
620 skb_queue_empty(&yp->send_queue))
621 return;
622 /* tx_state is TX_OFF and there is data to send */
623
624 if (yp->dupmode) {
625 /* Full duplex mode, don't wait */
626 yam_start_tx(dev, yp);
627 return;
628 }
629 if (yp->dcd) {
630 /* DCD on, wait slotime ... */
631 yp->slotcnt = yp->slot / 10;
632 return;
633 }
634 /* Is slottime passed ? */
635 if ((--yp->slotcnt) > 0)
636 return;
637
638 yp->slotcnt = yp->slot / 10;
639
640 /* is random > persist ? */
641 if ((random32() % 256) > yp->pers)
642 return;
643
644 yam_start_tx(dev, yp);
645 }
646
647 static void yam_dotimer(unsigned long dummy)
648 {
649 int i;
650
651 for (i = 0; i < NR_PORTS; i++) {
652 struct net_device *dev = yam_devs[i];
653 if (dev && netif_running(dev))
654 yam_arbitrate(dev);
655 }
656 yam_timer.expires = jiffies + HZ / 100;
657 add_timer(&yam_timer);
658 }
659
660 static void yam_tx_byte(struct net_device *dev, struct yam_port *yp)
661 {
662 struct sk_buff *skb;
663 unsigned char b, temp;
664
665 switch (yp->tx_state) {
666 case TX_OFF:
667 break;
668 case TX_HEAD:
669 if (--yp->tx_count <= 0) {
670 if (!(skb = skb_dequeue(&yp->send_queue))) {
671 ptt_off(dev);
672 yp->tx_state = TX_OFF;
673 break;
674 }
675 yp->tx_state = TX_DATA;
676 if (skb->data[0] != 0) {
677 /* do_kiss_params(s, skb->data, skb->len); */
678 dev_kfree_skb_any(skb);
679 break;
680 }
681 yp->tx_len = skb->len - 1; /* strip KISS byte */
682 if (yp->tx_len >= YAM_MAX_FRAME || yp->tx_len < 2) {
683 dev_kfree_skb_any(skb);
684 break;
685 }
686 skb_copy_from_linear_data_offset(skb, 1,
687 yp->tx_buf,
688 yp->tx_len);
689 dev_kfree_skb_any(skb);
690 yp->tx_count = 0;
691 yp->tx_crcl = 0x21;
692 yp->tx_crch = 0xf3;
693 yp->tx_state = TX_DATA;
694 }
695 break;
696 case TX_DATA:
697 b = yp->tx_buf[yp->tx_count++];
698 outb(b, THR(dev->base_addr));
699 temp = yp->tx_crcl;
700 yp->tx_crcl = chktabl[temp] ^ yp->tx_crch;
701 yp->tx_crch = chktabh[temp] ^ b;
702 if (yp->tx_count >= yp->tx_len) {
703 yp->tx_state = TX_CRC1;
704 }
705 break;
706 case TX_CRC1:
707 yp->tx_crch = chktabl[yp->tx_crcl] ^ yp->tx_crch;
708 yp->tx_crcl = chktabh[yp->tx_crcl] ^ chktabl[yp->tx_crch] ^ 0xff;
709 outb(yp->tx_crcl, THR(dev->base_addr));
710 yp->tx_state = TX_CRC2;
711 break;
712 case TX_CRC2:
713 outb(chktabh[yp->tx_crch] ^ 0xFF, THR(dev->base_addr));
714 if (skb_queue_empty(&yp->send_queue)) {
715 yp->tx_count = (yp->bitrate * yp->txtail) / 8000;
716 if (yp->dupmode == 2)
717 yp->tx_count += (yp->bitrate * yp->holdd) / 8;
718 if (yp->tx_count == 0)
719 yp->tx_count = 1;
720 yp->tx_state = TX_TAIL;
721 } else {
722 yp->tx_count = 1;
723 yp->tx_state = TX_HEAD;
724 }
725 ++dev->stats.tx_packets;
726 break;
727 case TX_TAIL:
728 if (--yp->tx_count <= 0) {
729 yp->tx_state = TX_OFF;
730 ptt_off(dev);
731 }
732 break;
733 }
734 }
735
736 /***********************************************************************************
737 * ISR routine
738 ************************************************************************************/
739
740 static irqreturn_t yam_interrupt(int irq, void *dev_id)
741 {
742 struct net_device *dev;
743 struct yam_port *yp;
744 unsigned char iir;
745 int counter = 100;
746 int i;
747 int handled = 0;
748
749 for (i = 0; i < NR_PORTS; i++) {
750 dev = yam_devs[i];
751 yp = netdev_priv(dev);
752
753 if (!netif_running(dev))
754 continue;
755
756 while ((iir = IIR_MASK & inb(IIR(dev->base_addr))) != IIR_NOPEND) {
757 unsigned char msr = inb(MSR(dev->base_addr));
758 unsigned char lsr = inb(LSR(dev->base_addr));
759 unsigned char rxb;
760
761 handled = 1;
762
763 if (lsr & LSR_OE)
764 ++dev->stats.rx_fifo_errors;
765
766 yp->dcd = (msr & RX_DCD) ? 1 : 0;
767
768 if (--counter <= 0) {
769 printk(KERN_ERR "%s: too many irq iir=%d\n",
770 dev->name, iir);
771 goto out;
772 }
773 if (msr & TX_RDY) {
774 ++yp->nb_mdint;
775 yam_tx_byte(dev, yp);
776 }
777 if (lsr & LSR_RXC) {
778 ++yp->nb_rxint;
779 rxb = inb(RBR(dev->base_addr));
780 if (msr & RX_FLAG)
781 yam_rx_flag(dev, yp);
782 else
783 yam_rx_byte(dev, yp, rxb);
784 }
785 }
786 }
787 out:
788 return IRQ_RETVAL(handled);
789 }
790
791 #ifdef CONFIG_PROC_FS
792
793 static void *yam_seq_start(struct seq_file *seq, loff_t *pos)
794 {
795 return (*pos < NR_PORTS) ? yam_devs[*pos] : NULL;
796 }
797
798 static void *yam_seq_next(struct seq_file *seq, void *v, loff_t *pos)
799 {
800 ++*pos;
801 return (*pos < NR_PORTS) ? yam_devs[*pos] : NULL;
802 }
803
804 static void yam_seq_stop(struct seq_file *seq, void *v)
805 {
806 }
807
808 static int yam_seq_show(struct seq_file *seq, void *v)
809 {
810 struct net_device *dev = v;
811 const struct yam_port *yp = netdev_priv(dev);
812
813 seq_printf(seq, "Device %s\n", dev->name);
814 seq_printf(seq, " Up %d\n", netif_running(dev));
815 seq_printf(seq, " Speed %u\n", yp->bitrate);
816 seq_printf(seq, " IoBase 0x%x\n", yp->iobase);
817 seq_printf(seq, " BaudRate %u\n", yp->baudrate);
818 seq_printf(seq, " IRQ %u\n", yp->irq);
819 seq_printf(seq, " TxState %u\n", yp->tx_state);
820 seq_printf(seq, " Duplex %u\n", yp->dupmode);
821 seq_printf(seq, " HoldDly %u\n", yp->holdd);
822 seq_printf(seq, " TxDelay %u\n", yp->txd);
823 seq_printf(seq, " TxTail %u\n", yp->txtail);
824 seq_printf(seq, " SlotTime %u\n", yp->slot);
825 seq_printf(seq, " Persist %u\n", yp->pers);
826 seq_printf(seq, " TxFrames %lu\n", dev->stats.tx_packets);
827 seq_printf(seq, " RxFrames %lu\n", dev->stats.rx_packets);
828 seq_printf(seq, " TxInt %u\n", yp->nb_mdint);
829 seq_printf(seq, " RxInt %u\n", yp->nb_rxint);
830 seq_printf(seq, " RxOver %lu\n", dev->stats.rx_fifo_errors);
831 seq_printf(seq, "\n");
832 return 0;
833 }
834
835 static const struct seq_operations yam_seqops = {
836 .start = yam_seq_start,
837 .next = yam_seq_next,
838 .stop = yam_seq_stop,
839 .show = yam_seq_show,
840 };
841
842 static int yam_info_open(struct inode *inode, struct file *file)
843 {
844 return seq_open(file, &yam_seqops);
845 }
846
847 static const struct file_operations yam_info_fops = {
848 .owner = THIS_MODULE,
849 .open = yam_info_open,
850 .read = seq_read,
851 .llseek = seq_lseek,
852 .release = seq_release,
853 };
854
855 #endif
856
857
858 /* --------------------------------------------------------------------- */
859
860 static int yam_open(struct net_device *dev)
861 {
862 struct yam_port *yp = netdev_priv(dev);
863 enum uart u;
864 int i;
865 int ret=0;
866
867 printk(KERN_INFO "Trying %s at iobase 0x%lx irq %u\n", dev->name, dev->base_addr, dev->irq);
868
869 if (!dev || !yp->bitrate)
870 return -ENXIO;
871 if (!dev->base_addr || dev->base_addr > 0x1000 - YAM_EXTENT ||
872 dev->irq < 2 || dev->irq > 15) {
873 return -ENXIO;
874 }
875 if (!request_region(dev->base_addr, YAM_EXTENT, dev->name))
876 {
877 printk(KERN_ERR "%s: cannot 0x%lx busy\n", dev->name, dev->base_addr);
878 return -EACCES;
879 }
880 if ((u = yam_check_uart(dev->base_addr)) == c_uart_unknown) {
881 printk(KERN_ERR "%s: cannot find uart type\n", dev->name);
882 ret = -EIO;
883 goto out_release_base;
884 }
885 if (fpga_download(dev->base_addr, yp->bitrate)) {
886 printk(KERN_ERR "%s: cannot init FPGA\n", dev->name);
887 ret = -EIO;
888 goto out_release_base;
889 }
890 outb(0, IER(dev->base_addr));
891 if (request_irq(dev->irq, yam_interrupt, IRQF_DISABLED | IRQF_SHARED, dev->name, dev)) {
892 printk(KERN_ERR "%s: irq %d busy\n", dev->name, dev->irq);
893 ret = -EBUSY;
894 goto out_release_base;
895 }
896
897 yam_set_uart(dev);
898
899 netif_start_queue(dev);
900
901 yp->slotcnt = yp->slot / 10;
902
903 /* Reset overruns for all ports - FPGA programming makes overruns */
904 for (i = 0; i < NR_PORTS; i++) {
905 struct net_device *yam_dev = yam_devs[i];
906
907 inb(LSR(yam_dev->base_addr));
908 yam_dev->stats.rx_fifo_errors = 0;
909 }
910
911 printk(KERN_INFO "%s at iobase 0x%lx irq %u uart %s\n", dev->name, dev->base_addr, dev->irq,
912 uart_str[u]);
913 return 0;
914
915 out_release_base:
916 release_region(dev->base_addr, YAM_EXTENT);
917 return ret;
918 }
919
920 /* --------------------------------------------------------------------- */
921
922 static int yam_close(struct net_device *dev)
923 {
924 struct sk_buff *skb;
925 struct yam_port *yp = netdev_priv(dev);
926
927 if (!dev)
928 return -EINVAL;
929
930 /*
931 * disable interrupts
932 */
933 outb(0, IER(dev->base_addr));
934 outb(1, MCR(dev->base_addr));
935 /* Remove IRQ handler if last */
936 free_irq(dev->irq,dev);
937 release_region(dev->base_addr, YAM_EXTENT);
938 netif_stop_queue(dev);
939 while ((skb = skb_dequeue(&yp->send_queue)))
940 dev_kfree_skb(skb);
941
942 printk(KERN_INFO "%s: close yam at iobase 0x%lx irq %u\n",
943 yam_drvname, dev->base_addr, dev->irq);
944 return 0;
945 }
946
947 /* --------------------------------------------------------------------- */
948
949 static int yam_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
950 {
951 struct yam_port *yp = netdev_priv(dev);
952 struct yamdrv_ioctl_cfg yi;
953 struct yamdrv_ioctl_mcs *ym;
954 int ioctl_cmd;
955
956 if (copy_from_user(&ioctl_cmd, ifr->ifr_data, sizeof(int)))
957 return -EFAULT;
958
959 if (yp->magic != YAM_MAGIC)
960 return -EINVAL;
961
962 if (!capable(CAP_NET_ADMIN))
963 return -EPERM;
964
965 if (cmd != SIOCDEVPRIVATE)
966 return -EINVAL;
967
968 switch (ioctl_cmd) {
969
970 case SIOCYAMRESERVED:
971 return -EINVAL; /* unused */
972
973 case SIOCYAMSMCS:
974 if (netif_running(dev))
975 return -EINVAL; /* Cannot change this parameter when up */
976 if ((ym = kmalloc(sizeof(struct yamdrv_ioctl_mcs), GFP_KERNEL)) == NULL)
977 return -ENOBUFS;
978 ym->bitrate = 9600;
979 if (copy_from_user(ym, ifr->ifr_data, sizeof(struct yamdrv_ioctl_mcs))) {
980 kfree(ym);
981 return -EFAULT;
982 }
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 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 yam_timer.function = yam_dotimer;
1168 yam_timer.expires = jiffies + HZ / 100;
1169 add_timer(&yam_timer);
1170
1171 proc_net_fops_create(&init_net, "yam", S_IRUGO, &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(&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 proc_net_remove(&init_net, "yam");
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
Linux with added FPC-III support