aboutsummaryrefslogtreecommitdiff
path: root/drivers/isdn/act2000/act2000_isa.c
blob: 3014495b7ff7318234d919ef105d32d237842b32 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
/* $Id: act2000_isa.c,v 1.11.6.3 2001/09/23 22:24:32 kai Exp $
 *
 * ISDN lowlevel-module for the IBM ISDN-S0 Active 2000 (ISA-Version).
 *
 * Author       Fritz Elfert
 * Copyright    by Fritz Elfert      <fritz@isdn4linux.de>
 * 
 * This software may be used and distributed according to the terms
 * of the GNU General Public License, incorporated herein by reference.
 *
 * Thanks to Friedemann Baitinger and IBM Germany
 *
 */

#include "act2000.h"
#include "act2000_isa.h"
#include "capi.h"

static act2000_card *irq2card_map[16];

/*
 * Reset Controller, then try to read the Card's signature.
 + Return:
 *   1 = Signature found.
 *   0 = Signature not found.
 */
static int
act2000_isa_reset(unsigned short portbase)
{
        unsigned char reg;
        int i;
        int found;
        int serial = 0;

        found = 0;
        if ((reg = inb(portbase + ISA_COR)) != 0xff) {
                outb(reg | ISA_COR_RESET, portbase + ISA_COR);
                mdelay(10);
                outb(reg, portbase + ISA_COR);
                mdelay(10);

                for (i = 0; i < 16; i++) {
                        if (inb(portbase + ISA_ISR) & ISA_ISR_SERIAL)
                                serial |= 0x10000;
                        serial >>= 1;
                }
                if (serial == ISA_SER_ID)
                        found++;
        }
        return found;
}

int
act2000_isa_detect(unsigned short portbase)
{
        int ret = 0;

	if (request_region(portbase, ACT2000_PORTLEN, "act2000isa")) {
                ret = act2000_isa_reset(portbase);
		release_region(portbase, ISA_REGION);
	}
        return ret;
}

static irqreturn_t
act2000_isa_interrupt(int irq, void *dev_id)
{
        act2000_card *card = irq2card_map[irq];
        u_char istatus;

        if (!card) {
                printk(KERN_WARNING
                       "act2000: Spurious interrupt!\n");
                return IRQ_NONE;
        }
        istatus = (inb(ISA_PORT_ISR) & 0x07);
        if (istatus & ISA_ISR_OUT) {
                /* RX fifo has data */
		istatus &= ISA_ISR_OUT_MASK;
		outb(0, ISA_PORT_SIS);
		act2000_isa_receive(card);
		outb(ISA_SIS_INT, ISA_PORT_SIS);
        }
        if (istatus & ISA_ISR_ERR) {
                /* Error Interrupt */
		istatus &= ISA_ISR_ERR_MASK;
                printk(KERN_WARNING "act2000: errIRQ\n");
        }
	if (istatus)
		printk(KERN_DEBUG "act2000: ?IRQ %d %02x\n", irq, istatus);
	return IRQ_HANDLED;
}

static void
act2000_isa_select_irq(act2000_card * card)
{
	unsigned char reg;

	reg = (inb(ISA_PORT_COR) & ~ISA_COR_IRQOFF) | ISA_COR_PERR;
	switch (card->irq) {
		case 3:
			reg = ISA_COR_IRQ03;
			break;
		case 5:
			reg = ISA_COR_IRQ05;
			break;
		case 7:
			reg = ISA_COR_IRQ07;
			break;
		case 10:
			reg = ISA_COR_IRQ10;
			break;
		case 11:
			reg = ISA_COR_IRQ11;
			break;
		case 12:
			reg = ISA_COR_IRQ12;
			break;
		case 15:
			reg = ISA_COR_IRQ15;
			break;
	}
	outb(reg, ISA_PORT_COR);
}

static void
act2000_isa_enable_irq(act2000_card * card)
{
	act2000_isa_select_irq(card);
	/* Enable READ irq */
	outb(ISA_SIS_INT, ISA_PORT_SIS);
}

/*
 * Install interrupt handler, enable irq on card.
 * If irq is -1, choose next free irq, else irq is given explicitely.
 */
int
act2000_isa_config_irq(act2000_card * card, short irq)
{
        if (card->flags & ACT2000_FLAGS_IVALID) {
                free_irq(card->irq, NULL);
                irq2card_map[card->irq] = NULL;
        }
        card->flags &= ~ACT2000_FLAGS_IVALID;
        outb(ISA_COR_IRQOFF, ISA_PORT_COR);
        if (!irq)
                return 0;

	if (!request_irq(irq, &act2000_isa_interrupt, 0, card->regname, NULL)) {
		card->irq = irq;
		irq2card_map[card->irq] = card;
		card->flags |= ACT2000_FLAGS_IVALID;
                printk(KERN_WARNING
                       "act2000: Could not request irq %d\n",irq);
                return -EBUSY;
        } else {
		act2000_isa_select_irq(card);
                /* Disable READ and WRITE irq */
                outb(0, ISA_PORT_SIS);
                outb(0, ISA_PORT_SOS);
        }
        return 0;
}

int
act2000_isa_config_port(act2000_card * card, unsigned short portbase)
{
        if (card->flags & ACT2000_FLAGS_PVALID) {
                release_region(card->port, ISA_REGION);
                card->flags &= ~ACT2000_FLAGS_PVALID;
        }
	if (request_region(portbase, ACT2000_PORTLEN, card->regname) == NULL)
		return -EBUSY;
	else {
                card->port = portbase;
                card->flags |= ACT2000_FLAGS_PVALID;
                return 0;
        }
}

/*
 * Release ressources, used by an adaptor.
 */
void
act2000_isa_release(act2000_card * card)
{
        unsigned long flags;

        spin_lock_irqsave(&card->lock, flags);
        if (card->flags & ACT2000_FLAGS_IVALID) {
                free_irq(card->irq, NULL);
                irq2card_map[card->irq] = NULL;
        }
        card->flags &= ~ACT2000_FLAGS_IVALID;
        if (card->flags & ACT2000_FLAGS_PVALID)
                release_region(card->port, ISA_REGION);
        card->flags &= ~ACT2000_FLAGS_PVALID;
        spin_unlock_irqrestore(&card->lock, flags);
}

static int
act2000_isa_writeb(act2000_card * card, u_char data)
{
        u_char timeout = 40;

        while (timeout) {
                if (inb(ISA_PORT_SOS) & ISA_SOS_READY) {
                        outb(data, ISA_PORT_SDO);
                        return 0;
                } else {
                        timeout--;
                        udelay(10);
                }
        }
        return 1;
}

static int
act2000_isa_readb(act2000_card * card, u_char * data)
{
        u_char timeout = 40;

        while (timeout) {
                if (inb(ISA_PORT_SIS) & ISA_SIS_READY) {
                        *data = inb(ISA_PORT_SDI);
                        return 0;
                } else {
                        timeout--;
                        udelay(10);
                }
        }
        return 1;
}

void
act2000_isa_receive(act2000_card *card)
{
	u_char c;

        if (test_and_set_bit(ACT2000_LOCK_RX, (void *) &card->ilock) != 0)
		return;
	while (!act2000_isa_readb(card, &c)) {
		if (card->idat.isa.rcvidx < 8) {
                        card->idat.isa.rcvhdr[card->idat.isa.rcvidx++] = c;
			if (card->idat.isa.rcvidx == 8) {
				int valid = actcapi_chkhdr(card, (actcapi_msghdr *)&card->idat.isa.rcvhdr);

				if (valid) {
					card->idat.isa.rcvlen = ((actcapi_msghdr *)&card->idat.isa.rcvhdr)->len;
					card->idat.isa.rcvskb = dev_alloc_skb(card->idat.isa.rcvlen);
					if (card->idat.isa.rcvskb == NULL) {
						card->idat.isa.rcvignore = 1;
						printk(KERN_WARNING
						       "act2000_isa_receive: no memory\n");
						test_and_clear_bit(ACT2000_LOCK_RX, (void *) &card->ilock);
						return;
					}
					memcpy(skb_put(card->idat.isa.rcvskb, 8), card->idat.isa.rcvhdr, 8);
					card->idat.isa.rcvptr = skb_put(card->idat.isa.rcvskb, card->idat.isa.rcvlen - 8);
				} else {
					card->idat.isa.rcvidx = 0;
					printk(KERN_WARNING
					       "act2000_isa_receive: Invalid CAPI msg\n");
					{
						int i; __u8 *p; __u8 *c; __u8 tmp[30];
						for (i = 0, p = (__u8 *)&card->idat.isa.rcvhdr, c = tmp; i < 8; i++)
							c += sprintf(c, "%02x ", *(p++));
						printk(KERN_WARNING "act2000_isa_receive: %s\n", tmp);
					}
				}
			}
		} else {
			if (!card->idat.isa.rcvignore)
				*card->idat.isa.rcvptr++ = c;
			if (++card->idat.isa.rcvidx >= card->idat.isa.rcvlen) {
				if (!card->idat.isa.rcvignore) {
					skb_queue_tail(&card->rcvq, card->idat.isa.rcvskb);
					act2000_schedule_rx(card);
				}
				card->idat.isa.rcvidx = 0;
				card->idat.isa.rcvlen = 8;
				card->idat.isa.rcvignore = 0;
				card->idat.isa.rcvskb = NULL;
				card->idat.isa.rcvptr = card->idat.isa.rcvhdr;
			}
		}
	}
	if (!(card->flags & ACT2000_FLAGS_IVALID)) {
		/* In polling mode, schedule myself */
		if ((card->idat.isa.rcvidx) &&
		    (card->idat.isa.rcvignore ||
		     (card->idat.isa.rcvidx < card->idat.isa.rcvlen)))
			act2000_schedule_poll(card);
	}
	test_and_clear_bit(ACT2000_LOCK_RX, (void *) &card->ilock);
}

void
act2000_isa_send(act2000_card * card)
{
	unsigned long flags;
	struct sk_buff *skb;
	actcapi_msg *msg;
	int l;

        if (test_and_set_bit(ACT2000_LOCK_TX, (void *) &card->ilock) != 0)
		return;
	while (1) {
		spin_lock_irqsave(&card->lock, flags);
		if (!(card->sbuf)) {
			if ((card->sbuf = skb_dequeue(&card->sndq))) {
				card->ack_msg = card->sbuf->data;
				msg = (actcapi_msg *)card->sbuf->data;
				if ((msg->hdr.cmd.cmd == 0x86) &&
				    (msg->hdr.cmd.subcmd == 0)   ) {
					/* Save flags in message */
					card->need_b3ack = msg->msg.data_b3_req.flags;
					msg->msg.data_b3_req.flags = 0;
				}
			}
		}
		spin_unlock_irqrestore(&card->lock, flags);
		if (!(card->sbuf)) {
			/* No more data to send */
			test_and_clear_bit(ACT2000_LOCK_TX, (void *) &card->ilock);
			return;
		}
		skb = card->sbuf;
		l = 0;
		while (skb->len) {
			if (act2000_isa_writeb(card, *(skb->data))) {
				/* Fifo is full, but more data to send */
				test_and_clear_bit(ACT2000_LOCK_TX, (void *) &card->ilock);
				/* Schedule myself */
				act2000_schedule_tx(card);
				return;
			}
			skb_pull(skb, 1);
			l++;
		}
		msg = (actcapi_msg *)card->ack_msg;
		if ((msg->hdr.cmd.cmd == 0x86) &&
		    (msg->hdr.cmd.subcmd == 0)   ) {
			/*
			 * If it's user data, reset data-ptr
			 * and put skb into ackq.
			 */
			skb->data = card->ack_msg;
			/* Restore flags in message */
			msg->msg.data_b3_req.flags = card->need_b3ack;
			skb_queue_tail(&card->ackq, skb);
		} else
			dev_kfree_skb(skb);
		card->sbuf = NULL;
	}
}

/*
 * Get firmware ID, check for 'ISDN' signature.
 */
static int
act2000_isa_getid(act2000_card * card)
{

        act2000_fwid fid;
        u_char *p = (u_char *) & fid;
        int count = 0;

        while (1) {
                if (count > 510)
                        return -EPROTO;
                if (act2000_isa_readb(card, p++))
                        break;
                count++;
        }
        if (count <= 20) {
                printk(KERN_WARNING "act2000: No Firmware-ID!\n");
                return -ETIME;
        }
        *p = '\0';
        fid.revlen[0] = '\0';
        if (strcmp(fid.isdn, "ISDN")) {
                printk(KERN_WARNING "act2000: Wrong Firmware-ID!\n");
                return -EPROTO;
        }
	if ((p = strchr(fid.revision, '\n')))
		*p = '\0';
        printk(KERN_INFO "act2000: Firmware-ID: %s\n", fid.revision);
	if (card->flags & ACT2000_FLAGS_IVALID) {
		printk(KERN_DEBUG "Enabling Interrupts ...\n");
		act2000_isa_enable_irq(card);
	}
        return 0;
}

/*
 * Download microcode into card, check Firmware signature.
 */
int
act2000_isa_download(act2000_card * card, act2000_ddef __user * cb)
{
        unsigned int length;
        int l;
        int c;
        long timeout;
        u_char *b;
        u_char __user *p;
        u_char *buf;
        act2000_ddef cblock;

        if (!act2000_isa_reset(card->port))
                return -ENXIO;
        msleep_interruptible(500);
        if (copy_from_user(&cblock, cb, sizeof(cblock)))
        	return -EFAULT;
        length = cblock.length;
        p = cblock.buffer;
        if (!access_ok(VERIFY_READ, p, length))
                return -EFAULT;
        buf = (u_char *) kmalloc(1024, GFP_KERNEL);
        if (!buf)
                return -ENOMEM;
        timeout = 0;
        while (length) {
                l = (length > 1024) ? 1024 : length;
                c = 0;
                b = buf;
                if (copy_from_user(buf, p, l)) {
                        kfree(buf);
                        return -EFAULT;
                }
                while (c < l) {
                        if (act2000_isa_writeb(card, *b++)) {
                                printk(KERN_WARNING
                                       "act2000: loader timed out"
                                       " len=%d c=%d\n", length, c);
                                kfree(buf);
                                return -ETIME;
                        }
                        c++;
                }
                length -= l;
                p += l;
        }
        kfree(buf);
        msleep_interruptible(500);
        return (act2000_isa_getid(card));
}