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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 <asm/system.h>
56#include <linux/interrupt.h>
57#include <linux/ioport.h>
58#include <linux/firmware.h>
59#include <linux/platform_device.h>
60
61#include <linux/netdevice.h>
62#include <linux/if_arp.h>
63#include <linux/etherdevice.h>
64#include <linux/skbuff.h>
65#include <net/ax25.h>
66
67#include <linux/kernel.h>
68#include <linux/proc_fs.h>
69#include <linux/seq_file.h>
70#include <net/net_namespace.h>
71
72#include <asm/uaccess.h>
73#include <linux/init.h>
74
75#include <linux/yam.h>
76
77
78
79static const char yam_drvname[] = "yam";
80static const char yam_drvinfo[] __initdata = KERN_INFO \
81 "YAM driver version 0.8 by F1OAT/F6FBB\n";
82
83
84
85#define FIRMWARE_9600 "yam/9600.bin"
86#define FIRMWARE_1200 "yam/1200.bin"
87
88#define YAM_9600 1
89#define YAM_1200 2
90
91#define NR_PORTS 4
92#define YAM_MAGIC 0xF10A7654
93
94
95
96#define TX_OFF 0
97#define TX_HEAD 1
98#define TX_DATA 2
99#define TX_CRC1 3
100#define TX_CRC2 4
101#define TX_TAIL 5
102
103#define YAM_MAX_FRAME 1024
104
105#define DEFAULT_BITRATE 9600
106#define DEFAULT_HOLDD 10
107#define DEFAULT_TXD 300
108#define DEFAULT_TXTAIL 10
109#define DEFAULT_SLOT 100
110#define DEFAULT_PERS 64
111
112struct yam_port {
113 int magic;
114 int bitrate;
115 int baudrate;
116 int iobase;
117 int irq;
118 int dupmode;
119
120 struct net_device *dev;
121
122 int nb_rxint;
123 int nb_mdint;
124
125
126
127 int txd;
128 int holdd;
129 int txtail;
130 int slot;
131 int pers;
132
133
134
135 int tx_state;
136 int tx_count;
137 int slotcnt;
138 unsigned char tx_buf[YAM_MAX_FRAME];
139 int tx_len;
140 int tx_crcl, tx_crch;
141 struct sk_buff_head send_queue;
142
143
144
145 int dcd;
146 unsigned char rx_buf[YAM_MAX_FRAME];
147 int rx_len;
148 int rx_crcl, rx_crch;
149};
150
151struct yam_mcs {
152 unsigned char bits[YAM_FPGA_SIZE];
153 int bitrate;
154 struct yam_mcs *next;
155};
156
157static struct net_device *yam_devs[NR_PORTS];
158
159static struct yam_mcs *yam_data;
160
161static DEFINE_TIMER(yam_timer, NULL, 0, 0);
162
163
164
165#define RBR(iobase) (iobase+0)
166#define THR(iobase) (iobase+0)
167#define IER(iobase) (iobase+1)
168#define IIR(iobase) (iobase+2)
169#define FCR(iobase) (iobase+2)
170#define LCR(iobase) (iobase+3)
171#define MCR(iobase) (iobase+4)
172#define LSR(iobase) (iobase+5)
173#define MSR(iobase) (iobase+6)
174#define SCR(iobase) (iobase+7)
175#define DLL(iobase) (iobase+0)
176#define DLM(iobase) (iobase+1)
177
178#define YAM_EXTENT 8
179
180
181#define IIR_NOPEND 1
182#define IIR_MSR 0
183#define IIR_TX 2
184#define IIR_RX 4
185#define IIR_LSR 6
186#define IIR_TIMEOUT 12
187
188#define IIR_MASK 0x0F
189
190
191#define IER_RX 1
192#define IER_TX 2
193#define IER_LSR 4
194#define IER_MSR 8
195
196
197#define MCR_DTR 0x01
198#define MCR_RTS 0x02
199#define MCR_OUT1 0x04
200#define MCR_OUT2 0x08
201#define MCR_LOOP 0x10
202
203
204#define MSR_DCTS 0x01
205#define MSR_DDSR 0x02
206#define MSR_DRIN 0x04
207#define MSR_DDCD 0x08
208#define MSR_CTS 0x10
209#define MSR_DSR 0x20
210#define MSR_RING 0x40
211#define MSR_DCD 0x80
212
213
214#define LSR_RXC 0x01
215#define LSR_OE 0x02
216#define LSR_PE 0x04
217#define LSR_FE 0x08
218#define LSR_BREAK 0x10
219#define LSR_THRE 0x20
220#define LSR_TSRE 0x40
221
222
223#define LCR_DLAB 0x80
224#define LCR_BREAK 0x40
225#define LCR_PZERO 0x28
226#define LCR_PEVEN 0x18
227#define LCR_PODD 0x08
228#define LCR_STOP1 0x00
229#define LCR_STOP2 0x04
230#define LCR_BIT5 0x00
231#define LCR_BIT6 0x02
232#define LCR_BIT7 0x01
233#define LCR_BIT8 0x03
234
235
236
237#define TX_RDY MSR_DCTS
238#define RX_DCD MSR_DCD
239#define RX_FLAG MSR_RING
240#define FPGA_DONE MSR_DSR
241#define PTT_ON (MCR_RTS|MCR_OUT2)
242#define PTT_OFF (MCR_DTR|MCR_OUT2)
243
244#define ENABLE_RXINT IER_RX
245#define ENABLE_TXINT IER_MSR
246#define ENABLE_RTXINT (IER_RX|IER_MSR)
247
248
249
250
251
252
253static const unsigned char chktabl[256] =
254{0x00, 0x89, 0x12, 0x9b, 0x24, 0xad, 0x36, 0xbf, 0x48, 0xc1, 0x5a, 0xd3, 0x6c, 0xe5, 0x7e,
255 0xf7, 0x81, 0x08, 0x93, 0x1a, 0xa5, 0x2c, 0xb7, 0x3e, 0xc9, 0x40, 0xdb, 0x52, 0xed, 0x64,
256 0xff, 0x76, 0x02, 0x8b, 0x10, 0x99, 0x26, 0xaf, 0x34, 0xbd, 0x4a, 0xc3, 0x58, 0xd1, 0x6e,
257 0xe7, 0x7c, 0xf5, 0x83, 0x0a, 0x91, 0x18, 0xa7, 0x2e, 0xb5, 0x3c, 0xcb, 0x42, 0xd9, 0x50,
258 0xef, 0x66, 0xfd, 0x74, 0x04, 0x8d, 0x16, 0x9f, 0x20, 0xa9, 0x32, 0xbb, 0x4c, 0xc5, 0x5e,
259 0xd7, 0x68, 0xe1, 0x7a, 0xf3, 0x85, 0x0c, 0x97, 0x1e, 0xa1, 0x28, 0xb3, 0x3a, 0xcd, 0x44,
260 0xdf, 0x56, 0xe9, 0x60, 0xfb, 0x72, 0x06, 0x8f, 0x14, 0x9d, 0x22, 0xab, 0x30, 0xb9, 0x4e,
261 0xc7, 0x5c, 0xd5, 0x6a, 0xe3, 0x78, 0xf1, 0x87, 0x0e, 0x95, 0x1c, 0xa3, 0x2a, 0xb1, 0x38,
262 0xcf, 0x46, 0xdd, 0x54, 0xeb, 0x62, 0xf9, 0x70, 0x08, 0x81, 0x1a, 0x93, 0x2c, 0xa5, 0x3e,
263 0xb7, 0x40, 0xc9, 0x52, 0xdb, 0x64, 0xed, 0x76, 0xff, 0x89, 0x00, 0x9b, 0x12, 0xad, 0x24,
264 0xbf, 0x36, 0xc1, 0x48, 0xd3, 0x5a, 0xe5, 0x6c, 0xf7, 0x7e, 0x0a, 0x83, 0x18, 0x91, 0x2e,
265 0xa7, 0x3c, 0xb5, 0x42, 0xcb, 0x50, 0xd9, 0x66, 0xef, 0x74, 0xfd, 0x8b, 0x02, 0x99, 0x10,
266 0xaf, 0x26, 0xbd, 0x34, 0xc3, 0x4a, 0xd1, 0x58, 0xe7, 0x6e, 0xf5, 0x7c, 0x0c, 0x85, 0x1e,
267 0x97, 0x28, 0xa1, 0x3a, 0xb3, 0x44, 0xcd, 0x56, 0xdf, 0x60, 0xe9, 0x72, 0xfb, 0x8d, 0x04,
268 0x9f, 0x16, 0xa9, 0x20, 0xbb, 0x32, 0xc5, 0x4c, 0xd7, 0x5e, 0xe1, 0x68, 0xf3, 0x7a, 0x0e,
269 0x87, 0x1c, 0x95, 0x2a, 0xa3, 0x38, 0xb1, 0x46, 0xcf, 0x54, 0xdd, 0x62, 0xeb, 0x70, 0xf9,
270 0x8f, 0x06, 0x9d, 0x14, 0xab, 0x22, 0xb9, 0x30, 0xc7, 0x4e, 0xd5, 0x5c, 0xe3, 0x6a, 0xf1,
271 0x78};
272static const unsigned char chktabh[256] =
273{0x00, 0x11, 0x23, 0x32, 0x46, 0x57, 0x65, 0x74, 0x8c, 0x9d, 0xaf, 0xbe, 0xca, 0xdb, 0xe9,
274 0xf8, 0x10, 0x01, 0x33, 0x22, 0x56, 0x47, 0x75, 0x64, 0x9c, 0x8d, 0xbf, 0xae, 0xda, 0xcb,
275 0xf9, 0xe8, 0x21, 0x30, 0x02, 0x13, 0x67, 0x76, 0x44, 0x55, 0xad, 0xbc, 0x8e, 0x9f, 0xeb,
276 0xfa, 0xc8, 0xd9, 0x31, 0x20, 0x12, 0x03, 0x77, 0x66, 0x54, 0x45, 0xbd, 0xac, 0x9e, 0x8f,
277 0xfb, 0xea, 0xd8, 0xc9, 0x42, 0x53, 0x61, 0x70, 0x04, 0x15, 0x27, 0x36, 0xce, 0xdf, 0xed,
278 0xfc, 0x88, 0x99, 0xab, 0xba, 0x52, 0x43, 0x71, 0x60, 0x14, 0x05, 0x37, 0x26, 0xde, 0xcf,
279 0xfd, 0xec, 0x98, 0x89, 0xbb, 0xaa, 0x63, 0x72, 0x40, 0x51, 0x25, 0x34, 0x06, 0x17, 0xef,
280 0xfe, 0xcc, 0xdd, 0xa9, 0xb8, 0x8a, 0x9b, 0x73, 0x62, 0x50, 0x41, 0x35, 0x24, 0x16, 0x07,
281 0xff, 0xee, 0xdc, 0xcd, 0xb9, 0xa8, 0x9a, 0x8b, 0x84, 0x95, 0xa7, 0xb6, 0xc2, 0xd3, 0xe1,
282 0xf0, 0x08, 0x19, 0x2b, 0x3a, 0x4e, 0x5f, 0x6d, 0x7c, 0x94, 0x85, 0xb7, 0xa6, 0xd2, 0xc3,
283 0xf1, 0xe0, 0x18, 0x09, 0x3b, 0x2a, 0x5e, 0x4f, 0x7d, 0x6c, 0xa5, 0xb4, 0x86, 0x97, 0xe3,
284 0xf2, 0xc0, 0xd1, 0x29, 0x38, 0x0a, 0x1b, 0x6f, 0x7e, 0x4c, 0x5d, 0xb5, 0xa4, 0x96, 0x87,
285 0xf3, 0xe2, 0xd0, 0xc1, 0x39, 0x28, 0x1a, 0x0b, 0x7f, 0x6e, 0x5c, 0x4d, 0xc6, 0xd7, 0xe5,
286 0xf4, 0x80, 0x91, 0xa3, 0xb2, 0x4a, 0x5b, 0x69, 0x78, 0x0c, 0x1d, 0x2f, 0x3e, 0xd6, 0xc7,
287 0xf5, 0xe4, 0x90, 0x81, 0xb3, 0xa2, 0x5a, 0x4b, 0x79, 0x68, 0x1c, 0x0d, 0x3f, 0x2e, 0xe7,
288 0xf6, 0xc4, 0xd5, 0xa1, 0xb0, 0x82, 0x93, 0x6b, 0x7a, 0x48, 0x59, 0x2d, 0x3c, 0x0e, 0x1f,
289 0xf7, 0xe6, 0xd4, 0xc5, 0xb1, 0xa0, 0x92, 0x83, 0x7b, 0x6a, 0x58, 0x49, 0x3d, 0x2c, 0x1e,
290 0x0f};
291
292
293
294
295
296static void delay(int ms)
297{
298 unsigned long timeout = jiffies + ((ms * HZ) / 1000);
299 while (time_before(jiffies, timeout))
300 cpu_relax();
301}
302
303
304
305
306
307static void fpga_reset(int iobase)
308{
309 outb(0, IER(iobase));
310 outb(LCR_DLAB | LCR_BIT5, LCR(iobase));
311 outb(1, DLL(iobase));
312 outb(0, DLM(iobase));
313
314 outb(LCR_BIT5, LCR(iobase));
315 inb(LSR(iobase));
316 inb(MSR(iobase));
317
318 outb(MCR_OUT1 | MCR_OUT2, MCR(iobase));
319 delay(100);
320
321 outb(MCR_DTR | MCR_RTS | MCR_OUT1 | MCR_OUT2, MCR(iobase));
322 delay(100);
323}
324
325
326
327
328
329static int fpga_write(int iobase, unsigned char wrd)
330{
331 unsigned char bit;
332 int k;
333 unsigned long timeout = jiffies + HZ / 10;
334
335 for (k = 0; k < 8; k++) {
336 bit = (wrd & 0x80) ? (MCR_RTS | MCR_DTR) : MCR_DTR;
337 outb(bit | MCR_OUT1 | MCR_OUT2, MCR(iobase));
338 wrd <<= 1;
339 outb(0xfc, THR(iobase));
340 while ((inb(LSR(iobase)) & LSR_TSRE) == 0)
341 if (time_after(jiffies, timeout))
342 return -1;
343 }
344
345 return 0;
346}
347
348
349
350
351
352
353static unsigned char *add_mcs(unsigned char *bits, int bitrate,
354 unsigned int predef)
355{
356 const char *fw_name[2] = {FIRMWARE_9600, FIRMWARE_1200};
357 const struct firmware *fw;
358 struct platform_device *pdev;
359 struct yam_mcs *p;
360 int err;
361
362 switch (predef) {
363 case 0:
364 fw = NULL;
365 break;
366 case YAM_1200:
367 case YAM_9600:
368 predef--;
369 pdev = platform_device_register_simple("yam", 0, NULL, 0);
370 if (IS_ERR(pdev)) {
371 printk(KERN_ERR "yam: Failed to register firmware\n");
372 return NULL;
373 }
374 err = request_firmware(&fw, fw_name[predef], &pdev->dev);
375 platform_device_unregister(pdev);
376 if (err) {
377 printk(KERN_ERR "Failed to load firmware \"%s\"\n",
378 fw_name[predef]);
379 return NULL;
380 }
381 if (fw->size != YAM_FPGA_SIZE) {
382 printk(KERN_ERR "Bogus length %zu in firmware \"%s\"\n",
383 fw->size, fw_name[predef]);
384 release_firmware(fw);
385 return NULL;
386 }
387 bits = (unsigned char *)fw->data;
388 break;
389 default:
390 printk(KERN_ERR "yam: Invalid predef number %u\n", predef);
391 return NULL;
392 }
393
394
395 p = yam_data;
396 while (p) {
397 if (p->bitrate == bitrate) {
398 memcpy(p->bits, bits, YAM_FPGA_SIZE);
399 goto out;
400 }
401 p = p->next;
402 }
403
404
405 if ((p = kmalloc(sizeof(struct yam_mcs), GFP_KERNEL)) == NULL) {
406 printk(KERN_WARNING "YAM: no memory to allocate mcs\n");
407 release_firmware(fw);
408 return NULL;
409 }
410 memcpy(p->bits, bits, YAM_FPGA_SIZE);
411 p->bitrate = bitrate;
412 p->next = yam_data;
413 yam_data = p;
414 out:
415 release_firmware(fw);
416 return p->bits;
417}
418
419static unsigned char *get_mcs(int bitrate)
420{
421 struct yam_mcs *p;
422
423 p = yam_data;
424 while (p) {
425 if (p->bitrate == bitrate)
426 return p->bits;
427 p = p->next;
428 }
429
430
431 switch (bitrate) {
432 case 1200:
433
434 return add_mcs(NULL, bitrate, YAM_1200);
435 default:
436
437 return add_mcs(NULL, bitrate, YAM_9600);
438 }
439}
440
441
442
443
444
445
446static int fpga_download(int iobase, int bitrate)
447{
448 int i, rc;
449 unsigned char *pbits;
450
451 pbits = get_mcs(bitrate);
452 if (pbits == NULL)
453 return -1;
454
455 fpga_reset(iobase);
456 for (i = 0; i < YAM_FPGA_SIZE; i++) {
457 if (fpga_write(iobase, pbits[i])) {
458 printk(KERN_ERR "yam: error in write cycle\n");
459 return -1;
460 }
461 }
462
463 fpga_write(iobase, 0xFF);
464 rc = inb(MSR(iobase));
465
466
467 delay(50);
468
469 return (rc & MSR_DSR) ? 0 : -1;
470}
471
472
473
474
475
476
477static void yam_set_uart(struct net_device *dev)
478{
479 struct yam_port *yp = netdev_priv(dev);
480 int divisor = 115200 / yp->baudrate;
481
482 outb(0, IER(dev->base_addr));
483 outb(LCR_DLAB | LCR_BIT8, LCR(dev->base_addr));
484 outb(divisor, DLL(dev->base_addr));
485 outb(0, DLM(dev->base_addr));
486 outb(LCR_BIT8, LCR(dev->base_addr));
487 outb(PTT_OFF, MCR(dev->base_addr));
488 outb(0x00, FCR(dev->base_addr));
489
490
491
492 inb(RBR(dev->base_addr));
493 inb(MSR(dev->base_addr));
494
495
496
497 outb(ENABLE_RTXINT, IER(dev->base_addr));
498}
499
500
501
502
503enum uart {
504 c_uart_unknown, c_uart_8250,
505 c_uart_16450, c_uart_16550, c_uart_16550A
506};
507
508static const char *uart_str[] =
509{"unknown", "8250", "16450", "16550", "16550A"};
510
511static enum uart yam_check_uart(unsigned int iobase)
512{
513 unsigned char b1, b2, b3;
514 enum uart u;
515 enum uart uart_tab[] =
516 {c_uart_16450, c_uart_unknown, c_uart_16550, c_uart_16550A};
517
518 b1 = inb(MCR(iobase));
519 outb(b1 | 0x10, MCR(iobase));
520 b2 = inb(MSR(iobase));
521 outb(0x1a, MCR(iobase));
522 b3 = inb(MSR(iobase)) & 0xf0;
523 outb(b1, MCR(iobase));
524 outb(b2, MSR(iobase));
525 if (b3 != 0x90)
526 return c_uart_unknown;
527 inb(RBR(iobase));
528 inb(RBR(iobase));
529 outb(0x01, FCR(iobase));
530 u = uart_tab[(inb(IIR(iobase)) >> 6) & 3];
531 if (u == c_uart_16450) {
532 outb(0x5a, SCR(iobase));
533 b1 = inb(SCR(iobase));
534 outb(0xa5, SCR(iobase));
535 b2 = inb(SCR(iobase));
536 if ((b1 != 0x5a) || (b2 != 0xa5))
537 u = c_uart_8250;
538 }
539 return u;
540}
541
542
543
544
545static inline void yam_rx_flag(struct net_device *dev, struct yam_port *yp)
546{
547 if (yp->dcd && yp->rx_len >= 3 && yp->rx_len < YAM_MAX_FRAME) {
548 int pkt_len = yp->rx_len - 2 + 1;
549 struct sk_buff *skb;
550
551 if ((yp->rx_crch & yp->rx_crcl) != 0xFF) {
552
553 } else {
554 if (!(skb = dev_alloc_skb(pkt_len))) {
555 printk(KERN_WARNING "%s: memory squeeze, dropping packet\n", dev->name);
556 ++dev->stats.rx_dropped;
557 } else {
558 unsigned char *cp;
559 cp = skb_put(skb, pkt_len);
560 *cp++ = 0;
561 memcpy(cp, yp->rx_buf, pkt_len - 1);
562 skb->protocol = ax25_type_trans(skb, dev);
563 netif_rx(skb);
564 ++dev->stats.rx_packets;
565 }
566 }
567 }
568 yp->rx_len = 0;
569 yp->rx_crcl = 0x21;
570 yp->rx_crch = 0xf3;
571}
572
573static inline void yam_rx_byte(struct net_device *dev, struct yam_port *yp, unsigned char rxb)
574{
575 if (yp->rx_len < YAM_MAX_FRAME) {
576 unsigned char c = yp->rx_crcl;
577 yp->rx_crcl = (chktabl[c] ^ yp->rx_crch);
578 yp->rx_crch = (chktabh[c] ^ rxb);
579 yp->rx_buf[yp->rx_len++] = rxb;
580 }
581}
582
583
584
585
586
587static void ptt_on(struct net_device *dev)
588{
589 outb(PTT_ON, MCR(dev->base_addr));
590}
591
592static void ptt_off(struct net_device *dev)
593{
594 outb(PTT_OFF, MCR(dev->base_addr));
595}
596
597static netdev_tx_t yam_send_packet(struct sk_buff *skb,
598 struct net_device *dev)
599{
600 struct yam_port *yp = netdev_priv(dev);
601
602 skb_queue_tail(&yp->send_queue, skb);
603 dev->trans_start = jiffies;
604 return NETDEV_TX_OK;
605}
606
607static void yam_start_tx(struct net_device *dev, struct yam_port *yp)
608{
609 if ((yp->tx_state == TX_TAIL) || (yp->txd == 0))
610 yp->tx_count = 1;
611 else
612 yp->tx_count = (yp->bitrate * yp->txd) / 8000;
613 yp->tx_state = TX_HEAD;
614 ptt_on(dev);
615}
616
617static void yam_arbitrate(struct net_device *dev)
618{
619 struct yam_port *yp = netdev_priv(dev);
620
621 if (yp->magic != YAM_MAGIC || yp->tx_state != TX_OFF ||
622 skb_queue_empty(&yp->send_queue))
623 return;
624
625
626 if (yp->dupmode) {
627
628 yam_start_tx(dev, yp);
629 return;
630 }
631 if (yp->dcd) {
632
633 yp->slotcnt = yp->slot / 10;
634 return;
635 }
636
637 if ((--yp->slotcnt) > 0)
638 return;
639
640 yp->slotcnt = yp->slot / 10;
641
642
643 if ((random32() % 256) > yp->pers)
644 return;
645
646 yam_start_tx(dev, yp);
647}
648
649static void yam_dotimer(unsigned long dummy)
650{
651 int i;
652
653 for (i = 0; i < NR_PORTS; i++) {
654 struct net_device *dev = yam_devs[i];
655 if (dev && netif_running(dev))
656 yam_arbitrate(dev);
657 }
658 yam_timer.expires = jiffies + HZ / 100;
659 add_timer(&yam_timer);
660}
661
662static void yam_tx_byte(struct net_device *dev, struct yam_port *yp)
663{
664 struct sk_buff *skb;
665 unsigned char b, temp;
666
667 switch (yp->tx_state) {
668 case TX_OFF:
669 break;
670 case TX_HEAD:
671 if (--yp->tx_count <= 0) {
672 if (!(skb = skb_dequeue(&yp->send_queue))) {
673 ptt_off(dev);
674 yp->tx_state = TX_OFF;
675 break;
676 }
677 yp->tx_state = TX_DATA;
678 if (skb->data[0] != 0) {
679
680 dev_kfree_skb_any(skb);
681 break;
682 }
683 yp->tx_len = skb->len - 1;
684 if (yp->tx_len >= YAM_MAX_FRAME || yp->tx_len < 2) {
685 dev_kfree_skb_any(skb);
686 break;
687 }
688 skb_copy_from_linear_data_offset(skb, 1,
689 yp->tx_buf,
690 yp->tx_len);
691 dev_kfree_skb_any(skb);
692 yp->tx_count = 0;
693 yp->tx_crcl = 0x21;
694 yp->tx_crch = 0xf3;
695 yp->tx_state = TX_DATA;
696 }
697 break;
698 case TX_DATA:
699 b = yp->tx_buf[yp->tx_count++];
700 outb(b, THR(dev->base_addr));
701 temp = yp->tx_crcl;
702 yp->tx_crcl = chktabl[temp] ^ yp->tx_crch;
703 yp->tx_crch = chktabh[temp] ^ b;
704 if (yp->tx_count >= yp->tx_len) {
705 yp->tx_state = TX_CRC1;
706 }
707 break;
708 case TX_CRC1:
709 yp->tx_crch = chktabl[yp->tx_crcl] ^ yp->tx_crch;
710 yp->tx_crcl = chktabh[yp->tx_crcl] ^ chktabl[yp->tx_crch] ^ 0xff;
711 outb(yp->tx_crcl, THR(dev->base_addr));
712 yp->tx_state = TX_CRC2;
713 break;
714 case TX_CRC2:
715 outb(chktabh[yp->tx_crch] ^ 0xFF, THR(dev->base_addr));
716 if (skb_queue_empty(&yp->send_queue)) {
717 yp->tx_count = (yp->bitrate * yp->txtail) / 8000;
718 if (yp->dupmode == 2)
719 yp->tx_count += (yp->bitrate * yp->holdd) / 8;
720 if (yp->tx_count == 0)
721 yp->tx_count = 1;
722 yp->tx_state = TX_TAIL;
723 } else {
724 yp->tx_count = 1;
725 yp->tx_state = TX_HEAD;
726 }
727 ++dev->stats.tx_packets;
728 break;
729 case TX_TAIL:
730 if (--yp->tx_count <= 0) {
731 yp->tx_state = TX_OFF;
732 ptt_off(dev);
733 }
734 break;
735 }
736}
737
738
739
740
741
742static irqreturn_t yam_interrupt(int irq, void *dev_id)
743{
744 struct net_device *dev;
745 struct yam_port *yp;
746 unsigned char iir;
747 int counter = 100;
748 int i;
749 int handled = 0;
750
751 for (i = 0; i < NR_PORTS; i++) {
752 dev = yam_devs[i];
753 yp = netdev_priv(dev);
754
755 if (!netif_running(dev))
756 continue;
757
758 while ((iir = IIR_MASK & inb(IIR(dev->base_addr))) != IIR_NOPEND) {
759 unsigned char msr = inb(MSR(dev->base_addr));
760 unsigned char lsr = inb(LSR(dev->base_addr));
761 unsigned char rxb;
762
763 handled = 1;
764
765 if (lsr & LSR_OE)
766 ++dev->stats.rx_fifo_errors;
767
768 yp->dcd = (msr & RX_DCD) ? 1 : 0;
769
770 if (--counter <= 0) {
771 printk(KERN_ERR "%s: too many irq iir=%d\n",
772 dev->name, iir);
773 goto out;
774 }
775 if (msr & TX_RDY) {
776 ++yp->nb_mdint;
777 yam_tx_byte(dev, yp);
778 }
779 if (lsr & LSR_RXC) {
780 ++yp->nb_rxint;
781 rxb = inb(RBR(dev->base_addr));
782 if (msr & RX_FLAG)
783 yam_rx_flag(dev, yp);
784 else
785 yam_rx_byte(dev, yp, rxb);
786 }
787 }
788 }
789out:
790 return IRQ_RETVAL(handled);
791}
792
793#ifdef CONFIG_PROC_FS
794
795static void *yam_seq_start(struct seq_file *seq, loff_t *pos)
796{
797 return (*pos < NR_PORTS) ? yam_devs[*pos] : NULL;
798}
799
800static void *yam_seq_next(struct seq_file *seq, void *v, loff_t *pos)
801{
802 ++*pos;
803 return (*pos < NR_PORTS) ? yam_devs[*pos] : NULL;
804}
805
806static void yam_seq_stop(struct seq_file *seq, void *v)
807{
808}
809
810static int yam_seq_show(struct seq_file *seq, void *v)
811{
812 struct net_device *dev = v;
813 const struct yam_port *yp = netdev_priv(dev);
814
815 seq_printf(seq, "Device %s\n", dev->name);
816 seq_printf(seq, " Up %d\n", netif_running(dev));
817 seq_printf(seq, " Speed %u\n", yp->bitrate);
818 seq_printf(seq, " IoBase 0x%x\n", yp->iobase);
819 seq_printf(seq, " BaudRate %u\n", yp->baudrate);
820 seq_printf(seq, " IRQ %u\n", yp->irq);
821 seq_printf(seq, " TxState %u\n", yp->tx_state);
822 seq_printf(seq, " Duplex %u\n", yp->dupmode);
823 seq_printf(seq, " HoldDly %u\n", yp->holdd);
824 seq_printf(seq, " TxDelay %u\n", yp->txd);
825 seq_printf(seq, " TxTail %u\n", yp->txtail);
826 seq_printf(seq, " SlotTime %u\n", yp->slot);
827 seq_printf(seq, " Persist %u\n", yp->pers);
828 seq_printf(seq, " TxFrames %lu\n", dev->stats.tx_packets);
829 seq_printf(seq, " RxFrames %lu\n", dev->stats.rx_packets);
830 seq_printf(seq, " TxInt %u\n", yp->nb_mdint);
831 seq_printf(seq, " RxInt %u\n", yp->nb_rxint);
832 seq_printf(seq, " RxOver %lu\n", dev->stats.rx_fifo_errors);
833 seq_printf(seq, "\n");
834 return 0;
835}
836
837static const struct seq_operations yam_seqops = {
838 .start = yam_seq_start,
839 .next = yam_seq_next,
840 .stop = yam_seq_stop,
841 .show = yam_seq_show,
842};
843
844static int yam_info_open(struct inode *inode, struct file *file)
845{
846 return seq_open(file, &yam_seqops);
847}
848
849static const struct file_operations yam_info_fops = {
850 .owner = THIS_MODULE,
851 .open = yam_info_open,
852 .read = seq_read,
853 .llseek = seq_lseek,
854 .release = seq_release,
855};
856
857#endif
858
859
860
861
862static int yam_open(struct net_device *dev)
863{
864 struct yam_port *yp = netdev_priv(dev);
865 enum uart u;
866 int i;
867 int ret=0;
868
869 printk(KERN_INFO "Trying %s at iobase 0x%lx irq %u\n", dev->name, dev->base_addr, dev->irq);
870
871 if (!dev || !yp->bitrate)
872 return -ENXIO;
873 if (!dev->base_addr || dev->base_addr > 0x1000 - YAM_EXTENT ||
874 dev->irq < 2 || dev->irq > 15) {
875 return -ENXIO;
876 }
877 if (!request_region(dev->base_addr, YAM_EXTENT, dev->name))
878 {
879 printk(KERN_ERR "%s: cannot 0x%lx busy\n", dev->name, dev->base_addr);
880 return -EACCES;
881 }
882 if ((u = yam_check_uart(dev->base_addr)) == c_uart_unknown) {
883 printk(KERN_ERR "%s: cannot find uart type\n", dev->name);
884 ret = -EIO;
885 goto out_release_base;
886 }
887 if (fpga_download(dev->base_addr, yp->bitrate)) {
888 printk(KERN_ERR "%s: cannot init FPGA\n", dev->name);
889 ret = -EIO;
890 goto out_release_base;
891 }
892 outb(0, IER(dev->base_addr));
893 if (request_irq(dev->irq, yam_interrupt, IRQF_DISABLED | IRQF_SHARED, dev->name, dev)) {
894 printk(KERN_ERR "%s: irq %d busy\n", dev->name, dev->irq);
895 ret = -EBUSY;
896 goto out_release_base;
897 }
898
899 yam_set_uart(dev);
900
901 netif_start_queue(dev);
902
903 yp->slotcnt = yp->slot / 10;
904
905
906 for (i = 0; i < NR_PORTS; i++) {
907 struct net_device *yam_dev = yam_devs[i];
908
909 inb(LSR(yam_dev->base_addr));
910 yam_dev->stats.rx_fifo_errors = 0;
911 }
912
913 printk(KERN_INFO "%s at iobase 0x%lx irq %u uart %s\n", dev->name, dev->base_addr, dev->irq,
914 uart_str[u]);
915 return 0;
916
917out_release_base:
918 release_region(dev->base_addr, YAM_EXTENT);
919 return ret;
920}
921
922
923
924static int yam_close(struct net_device *dev)
925{
926 struct sk_buff *skb;
927 struct yam_port *yp = netdev_priv(dev);
928
929 if (!dev)
930 return -EINVAL;
931
932
933
934
935 outb(0, IER(dev->base_addr));
936 outb(1, MCR(dev->base_addr));
937
938 free_irq(dev->irq,dev);
939 release_region(dev->base_addr, YAM_EXTENT);
940 netif_stop_queue(dev);
941 while ((skb = skb_dequeue(&yp->send_queue)))
942 dev_kfree_skb(skb);
943
944 printk(KERN_INFO "%s: close yam at iobase 0x%lx irq %u\n",
945 yam_drvname, dev->base_addr, dev->irq);
946 return 0;
947}
948
949
950
951static int yam_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
952{
953 struct yam_port *yp = netdev_priv(dev);
954 struct yamdrv_ioctl_cfg yi;
955 struct yamdrv_ioctl_mcs *ym;
956 int ioctl_cmd;
957
958 if (copy_from_user(&ioctl_cmd, ifr->ifr_data, sizeof(int)))
959 return -EFAULT;
960
961 if (yp->magic != YAM_MAGIC)
962 return -EINVAL;
963
964 if (!capable(CAP_NET_ADMIN))
965 return -EPERM;
966
967 if (cmd != SIOCDEVPRIVATE)
968 return -EINVAL;
969
970 switch (ioctl_cmd) {
971
972 case SIOCYAMRESERVED:
973 return -EINVAL;
974
975 case SIOCYAMSMCS:
976 if (netif_running(dev))
977 return -EINVAL;
978 if ((ym = kmalloc(sizeof(struct yamdrv_ioctl_mcs), GFP_KERNEL)) == NULL)
979 return -ENOBUFS;
980 ym->bitrate = 9600;
981 if (copy_from_user(ym, ifr->ifr_data, sizeof(struct yamdrv_ioctl_mcs))) {
982 kfree(ym);
983 return -EFAULT;
984 }
985 if (ym->bitrate > YAM_MAXBITRATE) {
986 kfree(ym);
987 return -EINVAL;
988 }
989
990 add_mcs(ym->bits, ym->bitrate, 0);
991 kfree(ym);
992 break;
993
994 case SIOCYAMSCFG:
995 if (!capable(CAP_SYS_RAWIO))
996 return -EPERM;
997 if (copy_from_user(&yi, ifr->ifr_data, sizeof(struct yamdrv_ioctl_cfg)))
998 return -EFAULT;
999
1000 if ((yi.cfg.mask & YAM_IOBASE) && netif_running(dev))
1001 return -EINVAL;
1002 if ((yi.cfg.mask & YAM_IRQ) && netif_running(dev))
1003 return -EINVAL;
1004 if ((yi.cfg.mask & YAM_BITRATE) && netif_running(dev))
1005 return -EINVAL;
1006 if ((yi.cfg.mask & YAM_BAUDRATE) && netif_running(dev))
1007 return -EINVAL;
1008
1009 if (yi.cfg.mask & YAM_IOBASE) {
1010 yp->iobase = yi.cfg.iobase;
1011 dev->base_addr = yi.cfg.iobase;
1012 }
1013 if (yi.cfg.mask & YAM_IRQ) {
1014 if (yi.cfg.irq > 15)
1015 return -EINVAL;
1016 yp->irq = yi.cfg.irq;
1017 dev->irq = yi.cfg.irq;
1018 }
1019 if (yi.cfg.mask & YAM_BITRATE) {
1020 if (yi.cfg.bitrate > YAM_MAXBITRATE)
1021 return -EINVAL;
1022 yp->bitrate = yi.cfg.bitrate;
1023 }
1024 if (yi.cfg.mask & YAM_BAUDRATE) {
1025 if (yi.cfg.baudrate > YAM_MAXBAUDRATE)
1026 return -EINVAL;
1027 yp->baudrate = yi.cfg.baudrate;
1028 }
1029 if (yi.cfg.mask & YAM_MODE) {
1030 if (yi.cfg.mode > YAM_MAXMODE)
1031 return -EINVAL;
1032 yp->dupmode = yi.cfg.mode;
1033 }
1034 if (yi.cfg.mask & YAM_HOLDDLY) {
1035 if (yi.cfg.holddly > YAM_MAXHOLDDLY)
1036 return -EINVAL;
1037 yp->holdd = yi.cfg.holddly;
1038 }
1039 if (yi.cfg.mask & YAM_TXDELAY) {
1040 if (yi.cfg.txdelay > YAM_MAXTXDELAY)
1041 return -EINVAL;
1042 yp->txd = yi.cfg.txdelay;
1043 }
1044 if (yi.cfg.mask & YAM_TXTAIL) {
1045 if (yi.cfg.txtail > YAM_MAXTXTAIL)
1046 return -EINVAL;
1047 yp->txtail = yi.cfg.txtail;
1048 }
1049 if (yi.cfg.mask & YAM_PERSIST) {
1050 if (yi.cfg.persist > YAM_MAXPERSIST)
1051 return -EINVAL;
1052 yp->pers = yi.cfg.persist;
1053 }
1054 if (yi.cfg.mask & YAM_SLOTTIME) {
1055 if (yi.cfg.slottime > YAM_MAXSLOTTIME)
1056 return -EINVAL;
1057 yp->slot = yi.cfg.slottime;
1058 yp->slotcnt = yp->slot / 10;
1059 }
1060 break;
1061
1062 case SIOCYAMGCFG:
1063 yi.cfg.mask = 0xffffffff;
1064 yi.cfg.iobase = yp->iobase;
1065 yi.cfg.irq = yp->irq;
1066 yi.cfg.bitrate = yp->bitrate;
1067 yi.cfg.baudrate = yp->baudrate;
1068 yi.cfg.mode = yp->dupmode;
1069 yi.cfg.txdelay = yp->txd;
1070 yi.cfg.holddly = yp->holdd;
1071 yi.cfg.txtail = yp->txtail;
1072 yi.cfg.persist = yp->pers;
1073 yi.cfg.slottime = yp->slot;
1074 if (copy_to_user(ifr->ifr_data, &yi, sizeof(struct yamdrv_ioctl_cfg)))
1075 return -EFAULT;
1076 break;
1077
1078 default:
1079 return -EINVAL;
1080
1081 }
1082
1083 return 0;
1084}
1085
1086
1087
1088static int yam_set_mac_address(struct net_device *dev, void *addr)
1089{
1090 struct sockaddr *sa = (struct sockaddr *) addr;
1091
1092
1093 memcpy(dev->dev_addr, sa->sa_data, dev->addr_len);
1094 return 0;
1095}
1096
1097
1098
1099static const struct net_device_ops yam_netdev_ops = {
1100 .ndo_open = yam_open,
1101 .ndo_stop = yam_close,
1102 .ndo_start_xmit = yam_send_packet,
1103 .ndo_do_ioctl = yam_ioctl,
1104 .ndo_set_mac_address = yam_set_mac_address,
1105};
1106
1107static void yam_setup(struct net_device *dev)
1108{
1109 struct yam_port *yp = netdev_priv(dev);
1110
1111 yp->magic = YAM_MAGIC;
1112 yp->bitrate = DEFAULT_BITRATE;
1113 yp->baudrate = DEFAULT_BITRATE * 2;
1114 yp->iobase = 0;
1115 yp->irq = 0;
1116 yp->dupmode = 0;
1117 yp->holdd = DEFAULT_HOLDD;
1118 yp->txd = DEFAULT_TXD;
1119 yp->txtail = DEFAULT_TXTAIL;
1120 yp->slot = DEFAULT_SLOT;
1121 yp->pers = DEFAULT_PERS;
1122 yp->dev = dev;
1123
1124 dev->base_addr = yp->iobase;
1125 dev->irq = yp->irq;
1126
1127 skb_queue_head_init(&yp->send_queue);
1128
1129 dev->netdev_ops = &yam_netdev_ops;
1130 dev->header_ops = &ax25_header_ops;
1131
1132 dev->type = ARPHRD_AX25;
1133 dev->hard_header_len = AX25_MAX_HEADER_LEN;
1134 dev->mtu = AX25_MTU;
1135 dev->addr_len = AX25_ADDR_LEN;
1136 memcpy(dev->broadcast, &ax25_bcast, AX25_ADDR_LEN);
1137 memcpy(dev->dev_addr, &ax25_defaddr, AX25_ADDR_LEN);
1138}
1139
1140static int __init yam_init_driver(void)
1141{
1142 struct net_device *dev;
1143 int i, err;
1144 char name[IFNAMSIZ];
1145
1146 printk(yam_drvinfo);
1147
1148 for (i = 0; i < NR_PORTS; i++) {
1149 sprintf(name, "yam%d", i);
1150
1151 dev = alloc_netdev(sizeof(struct yam_port), name,
1152 yam_setup);
1153 if (!dev) {
1154 pr_err("yam: cannot allocate net device\n");
1155 err = -ENOMEM;
1156 goto error;
1157 }
1158
1159 err = register_netdev(dev);
1160 if (err) {
1161 printk(KERN_WARNING "yam: cannot register net device %s\n", dev->name);
1162 goto error;
1163 }
1164 yam_devs[i] = dev;
1165
1166 }
1167
1168 yam_timer.function = yam_dotimer;
1169 yam_timer.expires = jiffies + HZ / 100;
1170 add_timer(&yam_timer);
1171
1172 proc_net_fops_create(&init_net, "yam", S_IRUGO, &yam_info_fops);
1173 return 0;
1174 error:
1175 while (--i >= 0) {
1176 unregister_netdev(yam_devs[i]);
1177 free_netdev(yam_devs[i]);
1178 }
1179 return err;
1180}
1181
1182
1183
1184static void __exit yam_cleanup_driver(void)
1185{
1186 struct yam_mcs *p;
1187 int i;
1188
1189 del_timer(&yam_timer);
1190 for (i = 0; i < NR_PORTS; i++) {
1191 struct net_device *dev = yam_devs[i];
1192 if (dev) {
1193 unregister_netdev(dev);
1194 free_netdev(dev);
1195 }
1196 }
1197
1198 while (yam_data) {
1199 p = yam_data;
1200 yam_data = yam_data->next;
1201 kfree(p);
1202 }
1203
1204 proc_net_remove(&init_net, "yam");
1205}
1206
1207
1208
1209MODULE_AUTHOR("Frederic Rible F1OAT frible@teaser.fr");
1210MODULE_DESCRIPTION("Yam amateur radio modem driver");
1211MODULE_LICENSE("GPL");
1212MODULE_FIRMWARE(FIRMWARE_1200);
1213MODULE_FIRMWARE(FIRMWARE_9600);
1214
1215module_init(yam_init_driver);
1216module_exit(yam_cleanup_driver);
1217
1218
1219
1220
