Pull cpuidle into release branch
[linux-2.6] / drivers / isdn / act2000 / act2000_isa.c
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
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
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
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
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
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
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
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
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
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
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
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 *c; __u8 tmp[30];
261                                                 for (i = 0, p = (__u8 *)&card->idat.isa.rcvhdr, c = tmp; i < 8; i++)
262                                                         c += sprintf(c, "%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
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
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
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 }