1 /* $Id: act2000_isa.c,v 1.11.6.3 2001/09/23 22:24:32 kai Exp $
2  *
3  * ISDN lowlevel-module for the IBM ISDN-S0 Active 2000 (ISA-Version).
4  *
5  * Author       Fritz Elfert
6  * Copyright    by Fritz Elfert      <fritz@isdn4linux.de>
7  *
8  * This software may be used and distributed according to the terms
9  * of the GNU General Public License, incorporated herein by reference.
10  *
11  * Thanks to Friedemann Baitinger and IBM Germany
12  *
13  */
14 
15 #include "act2000.h"
16 #include "act2000_isa.h"
17 #include "capi.h"
18 
19 /*
20  * Reset Controller, then try to read the Card's signature.
21  + Return:
22  *   1 = Signature found.
23  *   0 = Signature not found.
24  */
25 static int
act2000_isa_reset(unsigned short portbase)26 act2000_isa_reset(unsigned short portbase)
27 {
28         unsigned char reg;
29         int i;
30         int found;
31         int serial = 0;
32 
33         found = 0;
34         if ((reg = inb(portbase + ISA_COR)) != 0xff) {
35                 outb(reg | ISA_COR_RESET, portbase + ISA_COR);
36                 mdelay(10);
37                 outb(reg, portbase + ISA_COR);
38                 mdelay(10);
39 
40                 for (i = 0; i < 16; i++) {
41                         if (inb(portbase + ISA_ISR) & ISA_ISR_SERIAL)
42                                 serial |= 0x10000;
43                         serial >>= 1;
44                 }
45                 if (serial == ISA_SER_ID)
46                         found++;
47         }
48         return found;
49 }
50 
51 int
act2000_isa_detect(unsigned short portbase)52 act2000_isa_detect(unsigned short portbase)
53 {
54         int ret = 0;
55 
56 	if (request_region(portbase, ACT2000_PORTLEN, "act2000isa")) {
57                 ret = act2000_isa_reset(portbase);
58 		release_region(portbase, ISA_REGION);
59 	}
60         return ret;
61 }
62 
63 static irqreturn_t
act2000_isa_interrupt(int dummy,void * dev_id)64 act2000_isa_interrupt(int dummy, void *dev_id)
65 {
66         act2000_card *card = dev_id;
67         u_char istatus;
68 
69         istatus = (inb(ISA_PORT_ISR) & 0x07);
70         if (istatus & ISA_ISR_OUT) {
71                 /* RX fifo has data */
72 		istatus &= ISA_ISR_OUT_MASK;
73 		outb(0, ISA_PORT_SIS);
74 		act2000_isa_receive(card);
75 		outb(ISA_SIS_INT, ISA_PORT_SIS);
76         }
77         if (istatus & ISA_ISR_ERR) {
78                 /* Error Interrupt */
79 		istatus &= ISA_ISR_ERR_MASK;
80                 printk(KERN_WARNING "act2000: errIRQ\n");
81         }
82 	if (istatus)
83 		printk(KERN_DEBUG "act2000: ?IRQ %d %02x\n", card->irq, istatus);
84 	return IRQ_HANDLED;
85 }
86 
87 static void
act2000_isa_select_irq(act2000_card * card)88 act2000_isa_select_irq(act2000_card * card)
89 {
90 	unsigned char reg;
91 
92 	reg = (inb(ISA_PORT_COR) & ~ISA_COR_IRQOFF) | ISA_COR_PERR;
93 	switch (card->irq) {
94 		case 3:
95 			reg = ISA_COR_IRQ03;
96 			break;
97 		case 5:
98 			reg = ISA_COR_IRQ05;
99 			break;
100 		case 7:
101 			reg = ISA_COR_IRQ07;
102 			break;
103 		case 10:
104 			reg = ISA_COR_IRQ10;
105 			break;
106 		case 11:
107 			reg = ISA_COR_IRQ11;
108 			break;
109 		case 12:
110 			reg = ISA_COR_IRQ12;
111 			break;
112 		case 15:
113 			reg = ISA_COR_IRQ15;
114 			break;
115 	}
116 	outb(reg, ISA_PORT_COR);
117 }
118 
119 static void
act2000_isa_enable_irq(act2000_card * card)120 act2000_isa_enable_irq(act2000_card * card)
121 {
122 	act2000_isa_select_irq(card);
123 	/* Enable READ irq */
124 	outb(ISA_SIS_INT, ISA_PORT_SIS);
125 }
126 
127 /*
128  * Install interrupt handler, enable irq on card.
129  * If irq is -1, choose next free irq, else irq is given explicitly.
130  */
131 int
act2000_isa_config_irq(act2000_card * card,short irq)132 act2000_isa_config_irq(act2000_card * card, short irq)
133 {
134 	int old_irq;
135 
136         if (card->flags & ACT2000_FLAGS_IVALID) {
137                 free_irq(card->irq, card);
138         }
139         card->flags &= ~ACT2000_FLAGS_IVALID;
140         outb(ISA_COR_IRQOFF, ISA_PORT_COR);
141         if (!irq)
142                 return 0;
143 
144 	old_irq = card->irq;
145 	card->irq = irq;
146 	if (request_irq(irq, &act2000_isa_interrupt, 0, card->regname, card)) {
147 		card->irq = old_irq;
148 		card->flags |= ACT2000_FLAGS_IVALID;
149                 printk(KERN_WARNING
150                        "act2000: Could not request irq %d\n",irq);
151                 return -EBUSY;
152         } else {
153 		act2000_isa_select_irq(card);
154                 /* Disable READ and WRITE irq */
155                 outb(0, ISA_PORT_SIS);
156                 outb(0, ISA_PORT_SOS);
157         }
158         return 0;
159 }
160 
161 int
act2000_isa_config_port(act2000_card * card,unsigned short portbase)162 act2000_isa_config_port(act2000_card * card, unsigned short portbase)
163 {
164         if (card->flags & ACT2000_FLAGS_PVALID) {
165                 release_region(card->port, ISA_REGION);
166                 card->flags &= ~ACT2000_FLAGS_PVALID;
167         }
168 	if (request_region(portbase, ACT2000_PORTLEN, card->regname) == NULL)
169 		return -EBUSY;
170 	else {
171                 card->port = portbase;
172                 card->flags |= ACT2000_FLAGS_PVALID;
173                 return 0;
174         }
175 }
176 
177 /*
178  * Release ressources, used by an adaptor.
179  */
180 void
act2000_isa_release(act2000_card * card)181 act2000_isa_release(act2000_card * card)
182 {
183         unsigned long flags;
184 
185         spin_lock_irqsave(&card->lock, flags);
186         if (card->flags & ACT2000_FLAGS_IVALID)
187                 free_irq(card->irq, card);
188 
189         card->flags &= ~ACT2000_FLAGS_IVALID;
190         if (card->flags & ACT2000_FLAGS_PVALID)
191                 release_region(card->port, ISA_REGION);
192         card->flags &= ~ACT2000_FLAGS_PVALID;
193         spin_unlock_irqrestore(&card->lock, flags);
194 }
195 
196 static int
act2000_isa_writeb(act2000_card * card,u_char data)197 act2000_isa_writeb(act2000_card * card, u_char data)
198 {
199         u_char timeout = 40;
200 
201         while (timeout) {
202                 if (inb(ISA_PORT_SOS) & ISA_SOS_READY) {
203                         outb(data, ISA_PORT_SDO);
204                         return 0;
205                 } else {
206                         timeout--;
207                         udelay(10);
208                 }
209         }
210         return 1;
211 }
212 
213 static int
act2000_isa_readb(act2000_card * card,u_char * data)214 act2000_isa_readb(act2000_card * card, u_char * data)
215 {
216         u_char timeout = 40;
217 
218         while (timeout) {
219                 if (inb(ISA_PORT_SIS) & ISA_SIS_READY) {
220                         *data = inb(ISA_PORT_SDI);
221                         return 0;
222                 } else {
223                         timeout--;
224                         udelay(10);
225                 }
226         }
227         return 1;
228 }
229 
230 void
act2000_isa_receive(act2000_card * card)231 act2000_isa_receive(act2000_card *card)
232 {
233 	u_char c;
234 
235         if (test_and_set_bit(ACT2000_LOCK_RX, (void *) &card->ilock) != 0)
236 		return;
237 	while (!act2000_isa_readb(card, &c)) {
238 		if (card->idat.isa.rcvidx < 8) {
239                         card->idat.isa.rcvhdr[card->idat.isa.rcvidx++] = c;
240 			if (card->idat.isa.rcvidx == 8) {
241 				int valid = actcapi_chkhdr(card, (actcapi_msghdr *)&card->idat.isa.rcvhdr);
242 
243 				if (valid) {
244 					card->idat.isa.rcvlen = ((actcapi_msghdr *)&card->idat.isa.rcvhdr)->len;
245 					card->idat.isa.rcvskb = dev_alloc_skb(card->idat.isa.rcvlen);
246 					if (card->idat.isa.rcvskb == NULL) {
247 						card->idat.isa.rcvignore = 1;
248 						printk(KERN_WARNING
249 						       "act2000_isa_receive: no memory\n");
250 						test_and_clear_bit(ACT2000_LOCK_RX, (void *) &card->ilock);
251 						return;
252 					}
253 					memcpy(skb_put(card->idat.isa.rcvskb, 8), card->idat.isa.rcvhdr, 8);
254 					card->idat.isa.rcvptr = skb_put(card->idat.isa.rcvskb, card->idat.isa.rcvlen - 8);
255 				} else {
256 					card->idat.isa.rcvidx = 0;
257 					printk(KERN_WARNING
258 					       "act2000_isa_receive: Invalid CAPI msg\n");
259 					{
260 						int i; __u8 *p; __u8 *t; __u8 tmp[30];
261 						for (i = 0, p = (__u8 *)&card->idat.isa.rcvhdr, t = tmp; i < 8; i++)
262 							t += sprintf(t, "%02x ", *(p++));
263 						printk(KERN_WARNING "act2000_isa_receive: %s\n", tmp);
264 					}
265 				}
266 			}
267 		} else {
268 			if (!card->idat.isa.rcvignore)
269 				*card->idat.isa.rcvptr++ = c;
270 			if (++card->idat.isa.rcvidx >= card->idat.isa.rcvlen) {
271 				if (!card->idat.isa.rcvignore) {
272 					skb_queue_tail(&card->rcvq, card->idat.isa.rcvskb);
273 					act2000_schedule_rx(card);
274 				}
275 				card->idat.isa.rcvidx = 0;
276 				card->idat.isa.rcvlen = 8;
277 				card->idat.isa.rcvignore = 0;
278 				card->idat.isa.rcvskb = NULL;
279 				card->idat.isa.rcvptr = card->idat.isa.rcvhdr;
280 			}
281 		}
282 	}
283 	if (!(card->flags & ACT2000_FLAGS_IVALID)) {
284 		/* In polling mode, schedule myself */
285 		if ((card->idat.isa.rcvidx) &&
286 		    (card->idat.isa.rcvignore ||
287 		     (card->idat.isa.rcvidx < card->idat.isa.rcvlen)))
288 			act2000_schedule_poll(card);
289 	}
290 	test_and_clear_bit(ACT2000_LOCK_RX, (void *) &card->ilock);
291 }
292 
293 void
act2000_isa_send(act2000_card * card)294 act2000_isa_send(act2000_card * card)
295 {
296 	unsigned long flags;
297 	struct sk_buff *skb;
298 	actcapi_msg *msg;
299 	int l;
300 
301         if (test_and_set_bit(ACT2000_LOCK_TX, (void *) &card->ilock) != 0)
302 		return;
303 	while (1) {
304 		spin_lock_irqsave(&card->lock, flags);
305 		if (!(card->sbuf)) {
306 			if ((card->sbuf = skb_dequeue(&card->sndq))) {
307 				card->ack_msg = card->sbuf->data;
308 				msg = (actcapi_msg *)card->sbuf->data;
309 				if ((msg->hdr.cmd.cmd == 0x86) &&
310 				    (msg->hdr.cmd.subcmd == 0)   ) {
311 					/* Save flags in message */
312 					card->need_b3ack = msg->msg.data_b3_req.flags;
313 					msg->msg.data_b3_req.flags = 0;
314 				}
315 			}
316 		}
317 		spin_unlock_irqrestore(&card->lock, flags);
318 		if (!(card->sbuf)) {
319 			/* No more data to send */
320 			test_and_clear_bit(ACT2000_LOCK_TX, (void *) &card->ilock);
321 			return;
322 		}
323 		skb = card->sbuf;
324 		l = 0;
325 		while (skb->len) {
326 			if (act2000_isa_writeb(card, *(skb->data))) {
327 				/* Fifo is full, but more data to send */
328 				test_and_clear_bit(ACT2000_LOCK_TX, (void *) &card->ilock);
329 				/* Schedule myself */
330 				act2000_schedule_tx(card);
331 				return;
332 			}
333 			skb_pull(skb, 1);
334 			l++;
335 		}
336 		msg = (actcapi_msg *)card->ack_msg;
337 		if ((msg->hdr.cmd.cmd == 0x86) &&
338 		    (msg->hdr.cmd.subcmd == 0)   ) {
339 			/*
340 			 * If it's user data, reset data-ptr
341 			 * and put skb into ackq.
342 			 */
343 			skb->data = card->ack_msg;
344 			/* Restore flags in message */
345 			msg->msg.data_b3_req.flags = card->need_b3ack;
346 			skb_queue_tail(&card->ackq, skb);
347 		} else
348 			dev_kfree_skb(skb);
349 		card->sbuf = NULL;
350 	}
351 }
352 
353 /*
354  * Get firmware ID, check for 'ISDN' signature.
355  */
356 static int
act2000_isa_getid(act2000_card * card)357 act2000_isa_getid(act2000_card * card)
358 {
359 
360         act2000_fwid fid;
361         u_char *p = (u_char *) & fid;
362         int count = 0;
363 
364         while (1) {
365                 if (count > 510)
366                         return -EPROTO;
367                 if (act2000_isa_readb(card, p++))
368                         break;
369                 count++;
370         }
371         if (count <= 20) {
372                 printk(KERN_WARNING "act2000: No Firmware-ID!\n");
373                 return -ETIME;
374         }
375         *p = '\0';
376         fid.revlen[0] = '\0';
377         if (strcmp(fid.isdn, "ISDN")) {
378                 printk(KERN_WARNING "act2000: Wrong Firmware-ID!\n");
379                 return -EPROTO;
380         }
381 	if ((p = strchr(fid.revision, '\n')))
382 		*p = '\0';
383         printk(KERN_INFO "act2000: Firmware-ID: %s\n", fid.revision);
384 	if (card->flags & ACT2000_FLAGS_IVALID) {
385 		printk(KERN_DEBUG "Enabling Interrupts ...\n");
386 		act2000_isa_enable_irq(card);
387 	}
388         return 0;
389 }
390 
391 /*
392  * Download microcode into card, check Firmware signature.
393  */
394 int
act2000_isa_download(act2000_card * card,act2000_ddef __user * cb)395 act2000_isa_download(act2000_card * card, act2000_ddef __user * cb)
396 {
397         unsigned int length;
398         int l;
399         int c;
400         long timeout;
401         u_char *b;
402         u_char __user *p;
403         u_char *buf;
404         act2000_ddef cblock;
405 
406         if (!act2000_isa_reset(card->port))
407                 return -ENXIO;
408         msleep_interruptible(500);
409         if (copy_from_user(&cblock, cb, sizeof(cblock)))
410         	return -EFAULT;
411         length = cblock.length;
412         p = cblock.buffer;
413         if (!access_ok(VERIFY_READ, p, length))
414                 return -EFAULT;
415         buf = kmalloc(1024, GFP_KERNEL);
416         if (!buf)
417                 return -ENOMEM;
418         timeout = 0;
419         while (length) {
420                 l = (length > 1024) ? 1024 : length;
421                 c = 0;
422                 b = buf;
423                 if (copy_from_user(buf, p, l)) {
424                         kfree(buf);
425                         return -EFAULT;
426                 }
427                 while (c < l) {
428                         if (act2000_isa_writeb(card, *b++)) {
429                                 printk(KERN_WARNING
430                                        "act2000: loader timed out"
431                                        " len=%d c=%d\n", length, c);
432                                 kfree(buf);
433                                 return -ETIME;
434                         }
435                         c++;
436                 }
437                 length -= l;
438                 p += l;
439         }
440         kfree(buf);
441         msleep_interruptible(500);
442         return (act2000_isa_getid(card));
443 }
444