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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
78static const char yam_drvname[] = "yam";
79static 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
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
105#define DEFAULT_HOLDD 10
106#define DEFAULT_TXD 300
107#define DEFAULT_TXTAIL 10
108#define DEFAULT_SLOT 100
109#define DEFAULT_PERS 64
110
111struct 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
125
126 int txd;
127 int holdd;
128 int txtail;
129 int slot;
130 int pers;
131
132
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;
141
142
143
144 int dcd;
145 unsigned char rx_buf[YAM_MAX_FRAME];
146 int rx_len;
147 int rx_crcl, rx_crch;
148};
149
150struct yam_mcs {
151 unsigned char bits[YAM_FPGA_SIZE];
152 int bitrate;
153 struct yam_mcs *next;
154};
155
156static struct net_device *yam_devs[NR_PORTS];
157
158static struct yam_mcs *yam_data;
159
160static 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
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
186
187#define IIR_MASK 0x0F
188
189
190#define IER_RX 1
191#define IER_TX 2
192#define IER_LSR 4
193#define IER_MSR 8
194
195
196#define MCR_DTR 0x01
197#define MCR_RTS 0x02
198#define MCR_OUT1 0x04
199#define MCR_OUT2 0x08
200#define MCR_LOOP 0x10
201
202
203#define MSR_DCTS 0x01
204#define MSR_DDSR 0x02
205#define MSR_DRIN 0x04
206#define MSR_DDCD 0x08
207#define MSR_CTS 0x10
208#define MSR_DSR 0x20
209#define MSR_RING 0x40
210#define MSR_DCD 0x80
211
212
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
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
235
236#define TX_RDY MSR_DCTS
237#define RX_DCD MSR_DCD
238#define RX_FLAG MSR_RING
239#define FPGA_DONE MSR_DSR
240#define PTT_ON (MCR_RTS|MCR_OUT2)
241#define PTT_OFF (MCR_DTR|MCR_OUT2)
242
243#define ENABLE_RXINT IER_RX
244#define ENABLE_TXINT IER_MSR
245#define ENABLE_RTXINT (IER_RX|IER_MSR)
246
247
248
249
250
251
252static 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};
271static 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
293
294
295static 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
304
305
306static 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
317 outb(MCR_OUT1 | MCR_OUT2, MCR(iobase));
318 delay(100);
319
320 outb(MCR_DTR | MCR_RTS | MCR_OUT1 | MCR_OUT2, MCR(iobase));
321 delay(100);
322}
323
324
325
326
327
328static 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
349
350
351
352static 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
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
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
417static 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
429 switch (bitrate) {
430 case 1200:
431
432 return add_mcs(NULL, bitrate, YAM_1200);
433 default:
434
435 return add_mcs(NULL, bitrate, YAM_9600);
436 }
437}
438
439
440
441
442
443
444static 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;
458 }
459 }
460
461 fpga_write(iobase, 0xFF);
462 rc = inb(MSR(iobase));
463
464
465 delay(50);
466
467 return (rc & MSR_DSR) ? 0 : -1;
468}
469
470
471
472
473
474
475static 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
489
490 inb(RBR(dev->base_addr));
491 inb(MSR(dev->base_addr));
492
493
494
495 outb(ENABLE_RTXINT, IER(dev->base_addr));
496}
497
498
499
500
501enum uart {
502 c_uart_unknown, c_uart_8250,
503 c_uart_16450, c_uart_16550, c_uart_16550A
504};
505
506static const char *uart_str[] =
507{"unknown", "8250", "16450", "16550", "16550A"};
508
509static 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));
518 b2 = inb(MSR(iobase));
519 outb(0x1a, MCR(iobase));
520 b3 = inb(MSR(iobase)) & 0xf0;
521 outb(b1, MCR(iobase));
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));
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
542
543static 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;
547 struct sk_buff *skb;
548
549 if ((yp->rx_crch & yp->rx_crcl) != 0xFF) {
550
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;
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
571static 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
583
584
585static void ptt_on(struct net_device *dev)
586{
587 outb(PTT_ON, MCR(dev->base_addr));
588}
589
590static void ptt_off(struct net_device *dev)
591{
592 outb(PTT_OFF, MCR(dev->base_addr));
593}
594
595static 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 netif_trans_update(dev);
602 return NETDEV_TX_OK;
603}
604
605static 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
615static 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
623
624 if (yp->dupmode) {
625
626 yam_start_tx(dev, yp);
627 return;
628 }
629 if (yp->dcd) {
630
631 yp->slotcnt = yp->slot / 10;
632 return;
633 }
634
635 if ((--yp->slotcnt) > 0)
636 return;
637
638 yp->slotcnt = yp->slot / 10;
639
640
641 if ((prandom_u32() % 256) > yp->pers)
642 return;
643
644 yam_start_tx(dev, yp);
645}
646
647static 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
660static 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
678 dev_kfree_skb_any(skb);
679 break;
680 }
681 yp->tx_len = skb->len - 1;
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
738
739
740static 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 }
787out:
788 return IRQ_RETVAL(handled);
789}
790
791#ifdef CONFIG_PROC_FS
792
793static void *yam_seq_start(struct seq_file *seq, loff_t *pos)
794{
795 return (*pos < NR_PORTS) ? yam_devs[*pos] : NULL;
796}
797
798static 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
804static void yam_seq_stop(struct seq_file *seq, void *v)
805{
806}
807
808static 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
835static 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
842static int yam_info_open(struct inode *inode, struct file *file)
843{
844 return seq_open(file, &yam_seqops);
845}
846
847static 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
860static 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 (!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
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
915out_release_base:
916 release_region(dev->base_addr, YAM_EXTENT);
917 return ret;
918}
919
920
921
922static 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
932
933 outb(0, IER(dev->base_addr));
934 outb(1, MCR(dev->base_addr));
935
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
949static 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;
972
973 case SIOCYAMSMCS:
974 if (netif_running(dev))
975 return -EINVAL;
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
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;
1000 if ((yi.cfg.mask & YAM_IRQ) && netif_running(dev))
1001 return -EINVAL;
1002 if ((yi.cfg.mask & YAM_BITRATE) && netif_running(dev))
1003 return -EINVAL;
1004 if ((yi.cfg.mask & YAM_BAUDRATE) && netif_running(dev))
1005 return -EINVAL;
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 yi.cfg.mask = 0xffffffff;
1062 yi.cfg.iobase = yp->iobase;
1063 yi.cfg.irq = yp->irq;
1064 yi.cfg.bitrate = yp->bitrate;
1065 yi.cfg.baudrate = yp->baudrate;
1066 yi.cfg.mode = yp->dupmode;
1067 yi.cfg.txdelay = yp->txd;
1068 yi.cfg.holddly = yp->holdd;
1069 yi.cfg.txtail = yp->txtail;
1070 yi.cfg.persist = yp->pers;
1071 yi.cfg.slottime = yp->slot;
1072 if (copy_to_user(ifr->ifr_data, &yi, sizeof(struct yamdrv_ioctl_cfg)))
1073 return -EFAULT;
1074 break;
1075
1076 default:
1077 return -EINVAL;
1078
1079 }
1080
1081 return 0;
1082}
1083
1084
1085
1086static int yam_set_mac_address(struct net_device *dev, void *addr)
1087{
1088 struct sockaddr *sa = (struct sockaddr *) addr;
1089
1090
1091 memcpy(dev->dev_addr, sa->sa_data, dev->addr_len);
1092 return 0;
1093}
1094
1095
1096
1097static const struct net_device_ops yam_netdev_ops = {
1098 .ndo_open = yam_open,
1099 .ndo_stop = yam_close,
1100 .ndo_start_xmit = yam_send_packet,
1101 .ndo_do_ioctl = yam_ioctl,
1102 .ndo_set_mac_address = yam_set_mac_address,
1103};
1104
1105static void yam_setup(struct net_device *dev)
1106{
1107 struct yam_port *yp = netdev_priv(dev);
1108
1109 yp->magic = YAM_MAGIC;
1110 yp->bitrate = DEFAULT_BITRATE;
1111 yp->baudrate = DEFAULT_BITRATE * 2;
1112 yp->iobase = 0;
1113 yp->irq = 0;
1114 yp->dupmode = 0;
1115 yp->holdd = DEFAULT_HOLDD;
1116 yp->txd = DEFAULT_TXD;
1117 yp->txtail = DEFAULT_TXTAIL;
1118 yp->slot = DEFAULT_SLOT;
1119 yp->pers = DEFAULT_PERS;
1120 yp->dev = dev;
1121
1122 dev->base_addr = yp->iobase;
1123 dev->irq = yp->irq;
1124
1125 skb_queue_head_init(&yp->send_queue);
1126
1127 dev->netdev_ops = &yam_netdev_ops;
1128 dev->header_ops = &ax25_header_ops;
1129
1130 dev->type = ARPHRD_AX25;
1131 dev->hard_header_len = AX25_MAX_HEADER_LEN;
1132 dev->mtu = AX25_MTU;
1133 dev->addr_len = AX25_ADDR_LEN;
1134 memcpy(dev->broadcast, &ax25_bcast, AX25_ADDR_LEN);
1135 memcpy(dev->dev_addr, &ax25_defaddr, AX25_ADDR_LEN);
1136}
1137
1138static int __init yam_init_driver(void)
1139{
1140 struct net_device *dev;
1141 int i, err;
1142 char name[IFNAMSIZ];
1143
1144 printk(yam_drvinfo);
1145
1146 for (i = 0; i < NR_PORTS; i++) {
1147 sprintf(name, "yam%d", i);
1148
1149 dev = alloc_netdev(sizeof(struct yam_port), name,
1150 yam_setup);
1151 if (!dev) {
1152 pr_err("yam: cannot allocate net device\n");
1153 err = -ENOMEM;
1154 goto error;
1155 }
1156
1157 err = register_netdev(dev);
1158 if (err) {
1159 printk(KERN_WARNING "yam: cannot register net device %s\n", dev->name);
1160 goto error;
1161 }
1162 yam_devs[i] = dev;
1163
1164 }
1165
1166 yam_timer.function = yam_dotimer;
1167 yam_timer.expires = jiffies + HZ / 100;
1168 add_timer(&yam_timer);
1169
1170 proc_create("yam", S_IRUGO, init_net.proc_net, &yam_info_fops);
1171 return 0;
1172 error:
1173 while (--i >= 0) {
1174 unregister_netdev(yam_devs[i]);
1175 free_netdev(yam_devs[i]);
1176 }
1177 return err;
1178}
1179
1180
1181
1182static void __exit yam_cleanup_driver(void)
1183{
1184 struct yam_mcs *p;
1185 int i;
1186
1187 del_timer(&yam_timer);
1188 for (i = 0; i < NR_PORTS; i++) {
1189 struct net_device *dev = yam_devs[i];
1190 if (dev) {
1191 unregister_netdev(dev);
1192 free_netdev(dev);
1193 }
1194 }
1195
1196 while (yam_data) {
1197 p = yam_data;
1198 yam_data = yam_data->next;
1199 kfree(p);
1200 }
1201
1202 remove_proc_entry("yam", init_net.proc_net);
1203}
1204
1205
1206
1207MODULE_AUTHOR("Frederic Rible F1OAT frible@teaser.fr");
1208MODULE_DESCRIPTION("Yam amateur radio modem driver");
1209MODULE_LICENSE("GPL");
1210MODULE_FIRMWARE(FIRMWARE_1200);
1211MODULE_FIRMWARE(FIRMWARE_9600);
1212
1213module_init(yam_init_driver);
1214module_exit(yam_cleanup_driver);
1215
1216
1217
1218
