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1da177e4 LT |
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 | static act2000_card *irq2card_map[16]; | |
20 | ||
21 | /* | |
22 | * Reset Controller, then try to read the Card's signature. | |
23 | + Return: | |
24 | * 1 = Signature found. | |
25 | * 0 = Signature not found. | |
26 | */ | |
27 | static int | |
28 | act2000_isa_reset(unsigned short portbase) | |
29 | { | |
30 | unsigned char reg; | |
31 | int i; | |
32 | int found; | |
33 | int serial = 0; | |
34 | ||
35 | found = 0; | |
36 | if ((reg = inb(portbase + ISA_COR)) != 0xff) { | |
37 | outb(reg | ISA_COR_RESET, portbase + ISA_COR); | |
38 | mdelay(10); | |
39 | outb(reg, portbase + ISA_COR); | |
40 | mdelay(10); | |
41 | ||
42 | for (i = 0; i < 16; i++) { | |
43 | if (inb(portbase + ISA_ISR) & ISA_ISR_SERIAL) | |
44 | serial |= 0x10000; | |
45 | serial >>= 1; | |
46 | } | |
47 | if (serial == ISA_SER_ID) | |
48 | found++; | |
49 | } | |
50 | return found; | |
51 | } | |
52 | ||
53 | int | |
54 | act2000_isa_detect(unsigned short portbase) | |
55 | { | |
56 | int ret = 0; | |
57 | ||
58 | if (request_region(portbase, ACT2000_PORTLEN, "act2000isa")) { | |
59 | ret = act2000_isa_reset(portbase); | |
60 | release_region(portbase, ISA_REGION); | |
61 | } | |
62 | return ret; | |
63 | } | |
64 | ||
65 | static irqreturn_t | |
7d12e780 | 66 | act2000_isa_interrupt(int irq, void *dev_id) |
1da177e4 LT |
67 | { |
68 | act2000_card *card = irq2card_map[irq]; | |
69 | u_char istatus; | |
70 | ||
71 | if (!card) { | |
72 | printk(KERN_WARNING | |
73 | "act2000: Spurious interrupt!\n"); | |
74 | return IRQ_NONE; | |
75 | } | |
76 | istatus = (inb(ISA_PORT_ISR) & 0x07); | |
77 | if (istatus & ISA_ISR_OUT) { | |
78 | /* RX fifo has data */ | |
79 | istatus &= ISA_ISR_OUT_MASK; | |
80 | outb(0, ISA_PORT_SIS); | |
81 | act2000_isa_receive(card); | |
82 | outb(ISA_SIS_INT, ISA_PORT_SIS); | |
83 | } | |
84 | if (istatus & ISA_ISR_ERR) { | |
85 | /* Error Interrupt */ | |
86 | istatus &= ISA_ISR_ERR_MASK; | |
87 | printk(KERN_WARNING "act2000: errIRQ\n"); | |
88 | } | |
89 | if (istatus) | |
90 | printk(KERN_DEBUG "act2000: ?IRQ %d %02x\n", irq, istatus); | |
91 | return IRQ_HANDLED; | |
92 | } | |
93 | ||
94 | static void | |
95 | act2000_isa_select_irq(act2000_card * card) | |
96 | { | |
97 | unsigned char reg; | |
98 | ||
99 | reg = (inb(ISA_PORT_COR) & ~ISA_COR_IRQOFF) | ISA_COR_PERR; | |
100 | switch (card->irq) { | |
101 | case 3: | |
102 | reg = ISA_COR_IRQ03; | |
103 | break; | |
104 | case 5: | |
105 | reg = ISA_COR_IRQ05; | |
106 | break; | |
107 | case 7: | |
108 | reg = ISA_COR_IRQ07; | |
109 | break; | |
110 | case 10: | |
111 | reg = ISA_COR_IRQ10; | |
112 | break; | |
113 | case 11: | |
114 | reg = ISA_COR_IRQ11; | |
115 | break; | |
116 | case 12: | |
117 | reg = ISA_COR_IRQ12; | |
118 | break; | |
119 | case 15: | |
120 | reg = ISA_COR_IRQ15; | |
121 | break; | |
122 | } | |
123 | outb(reg, ISA_PORT_COR); | |
124 | } | |
125 | ||
126 | static void | |
127 | act2000_isa_enable_irq(act2000_card * card) | |
128 | { | |
129 | act2000_isa_select_irq(card); | |
130 | /* Enable READ irq */ | |
131 | outb(ISA_SIS_INT, ISA_PORT_SIS); | |
132 | } | |
133 | ||
134 | /* | |
135 | * Install interrupt handler, enable irq on card. | |
136 | * If irq is -1, choose next free irq, else irq is given explicitely. | |
137 | */ | |
138 | int | |
139 | act2000_isa_config_irq(act2000_card * card, short irq) | |
140 | { | |
141 | if (card->flags & ACT2000_FLAGS_IVALID) { | |
142 | free_irq(card->irq, NULL); | |
143 | irq2card_map[card->irq] = NULL; | |
144 | } | |
145 | card->flags &= ~ACT2000_FLAGS_IVALID; | |
146 | outb(ISA_COR_IRQOFF, ISA_PORT_COR); | |
147 | if (!irq) | |
148 | return 0; | |
149 | ||
150 | if (!request_irq(irq, &act2000_isa_interrupt, 0, card->regname, NULL)) { | |
151 | card->irq = irq; | |
152 | irq2card_map[card->irq] = card; | |
153 | card->flags |= ACT2000_FLAGS_IVALID; | |
154 | printk(KERN_WARNING | |
155 | "act2000: Could not request irq %d\n",irq); | |
156 | return -EBUSY; | |
157 | } else { | |
158 | act2000_isa_select_irq(card); | |
159 | /* Disable READ and WRITE irq */ | |
160 | outb(0, ISA_PORT_SIS); | |
161 | outb(0, ISA_PORT_SOS); | |
162 | } | |
163 | return 0; | |
164 | } | |
165 | ||
166 | int | |
167 | act2000_isa_config_port(act2000_card * card, unsigned short portbase) | |
168 | { | |
169 | if (card->flags & ACT2000_FLAGS_PVALID) { | |
170 | release_region(card->port, ISA_REGION); | |
171 | card->flags &= ~ACT2000_FLAGS_PVALID; | |
172 | } | |
173 | if (request_region(portbase, ACT2000_PORTLEN, card->regname) == NULL) | |
174 | return -EBUSY; | |
175 | else { | |
176 | card->port = portbase; | |
177 | card->flags |= ACT2000_FLAGS_PVALID; | |
178 | return 0; | |
179 | } | |
180 | } | |
181 | ||
182 | /* | |
183 | * Release ressources, used by an adaptor. | |
184 | */ | |
185 | void | |
186 | act2000_isa_release(act2000_card * card) | |
187 | { | |
188 | unsigned long flags; | |
189 | ||
190 | spin_lock_irqsave(&card->lock, flags); | |
191 | if (card->flags & ACT2000_FLAGS_IVALID) { | |
192 | free_irq(card->irq, NULL); | |
193 | irq2card_map[card->irq] = NULL; | |
194 | } | |
195 | card->flags &= ~ACT2000_FLAGS_IVALID; | |
196 | if (card->flags & ACT2000_FLAGS_PVALID) | |
197 | release_region(card->port, ISA_REGION); | |
198 | card->flags &= ~ACT2000_FLAGS_PVALID; | |
199 | spin_unlock_irqrestore(&card->lock, flags); | |
200 | } | |
201 | ||
202 | static int | |
203 | act2000_isa_writeb(act2000_card * card, u_char data) | |
204 | { | |
205 | u_char timeout = 40; | |
206 | ||
207 | while (timeout) { | |
208 | if (inb(ISA_PORT_SOS) & ISA_SOS_READY) { | |
209 | outb(data, ISA_PORT_SDO); | |
210 | return 0; | |
211 | } else { | |
212 | timeout--; | |
213 | udelay(10); | |
214 | } | |
215 | } | |
216 | return 1; | |
217 | } | |
218 | ||
219 | static int | |
220 | act2000_isa_readb(act2000_card * card, u_char * data) | |
221 | { | |
222 | u_char timeout = 40; | |
223 | ||
224 | while (timeout) { | |
225 | if (inb(ISA_PORT_SIS) & ISA_SIS_READY) { | |
226 | *data = inb(ISA_PORT_SDI); | |
227 | return 0; | |
228 | } else { | |
229 | timeout--; | |
230 | udelay(10); | |
231 | } | |
232 | } | |
233 | return 1; | |
234 | } | |
235 | ||
236 | void | |
237 | act2000_isa_receive(act2000_card *card) | |
238 | { | |
239 | u_char c; | |
240 | ||
241 | if (test_and_set_bit(ACT2000_LOCK_RX, (void *) &card->ilock) != 0) | |
242 | return; | |
243 | while (!act2000_isa_readb(card, &c)) { | |
244 | if (card->idat.isa.rcvidx < 8) { | |
245 | card->idat.isa.rcvhdr[card->idat.isa.rcvidx++] = c; | |
246 | if (card->idat.isa.rcvidx == 8) { | |
247 | int valid = actcapi_chkhdr(card, (actcapi_msghdr *)&card->idat.isa.rcvhdr); | |
248 | ||
249 | if (valid) { | |
250 | card->idat.isa.rcvlen = ((actcapi_msghdr *)&card->idat.isa.rcvhdr)->len; | |
251 | card->idat.isa.rcvskb = dev_alloc_skb(card->idat.isa.rcvlen); | |
252 | if (card->idat.isa.rcvskb == NULL) { | |
253 | card->idat.isa.rcvignore = 1; | |
254 | printk(KERN_WARNING | |
255 | "act2000_isa_receive: no memory\n"); | |
256 | test_and_clear_bit(ACT2000_LOCK_RX, (void *) &card->ilock); | |
257 | return; | |
258 | } | |
259 | memcpy(skb_put(card->idat.isa.rcvskb, 8), card->idat.isa.rcvhdr, 8); | |
260 | card->idat.isa.rcvptr = skb_put(card->idat.isa.rcvskb, card->idat.isa.rcvlen - 8); | |
261 | } else { | |
262 | card->idat.isa.rcvidx = 0; | |
263 | printk(KERN_WARNING | |
264 | "act2000_isa_receive: Invalid CAPI msg\n"); | |
265 | { | |
266 | int i; __u8 *p; __u8 *c; __u8 tmp[30]; | |
267 | for (i = 0, p = (__u8 *)&card->idat.isa.rcvhdr, c = tmp; i < 8; i++) | |
268 | c += sprintf(c, "%02x ", *(p++)); | |
269 | printk(KERN_WARNING "act2000_isa_receive: %s\n", tmp); | |
270 | } | |
271 | } | |
272 | } | |
273 | } else { | |
274 | if (!card->idat.isa.rcvignore) | |
275 | *card->idat.isa.rcvptr++ = c; | |
276 | if (++card->idat.isa.rcvidx >= card->idat.isa.rcvlen) { | |
277 | if (!card->idat.isa.rcvignore) { | |
278 | skb_queue_tail(&card->rcvq, card->idat.isa.rcvskb); | |
279 | act2000_schedule_rx(card); | |
280 | } | |
281 | card->idat.isa.rcvidx = 0; | |
282 | card->idat.isa.rcvlen = 8; | |
283 | card->idat.isa.rcvignore = 0; | |
284 | card->idat.isa.rcvskb = NULL; | |
285 | card->idat.isa.rcvptr = card->idat.isa.rcvhdr; | |
286 | } | |
287 | } | |
288 | } | |
289 | if (!(card->flags & ACT2000_FLAGS_IVALID)) { | |
290 | /* In polling mode, schedule myself */ | |
291 | if ((card->idat.isa.rcvidx) && | |
292 | (card->idat.isa.rcvignore || | |
293 | (card->idat.isa.rcvidx < card->idat.isa.rcvlen))) | |
294 | act2000_schedule_poll(card); | |
295 | } | |
296 | test_and_clear_bit(ACT2000_LOCK_RX, (void *) &card->ilock); | |
297 | } | |
298 | ||
299 | void | |
300 | act2000_isa_send(act2000_card * card) | |
301 | { | |
302 | unsigned long flags; | |
303 | struct sk_buff *skb; | |
304 | actcapi_msg *msg; | |
305 | int l; | |
306 | ||
307 | if (test_and_set_bit(ACT2000_LOCK_TX, (void *) &card->ilock) != 0) | |
308 | return; | |
309 | while (1) { | |
310 | spin_lock_irqsave(&card->lock, flags); | |
311 | if (!(card->sbuf)) { | |
312 | if ((card->sbuf = skb_dequeue(&card->sndq))) { | |
313 | card->ack_msg = card->sbuf->data; | |
314 | msg = (actcapi_msg *)card->sbuf->data; | |
315 | if ((msg->hdr.cmd.cmd == 0x86) && | |
316 | (msg->hdr.cmd.subcmd == 0) ) { | |
317 | /* Save flags in message */ | |
318 | card->need_b3ack = msg->msg.data_b3_req.flags; | |
319 | msg->msg.data_b3_req.flags = 0; | |
320 | } | |
321 | } | |
322 | } | |
323 | spin_unlock_irqrestore(&card->lock, flags); | |
324 | if (!(card->sbuf)) { | |
325 | /* No more data to send */ | |
326 | test_and_clear_bit(ACT2000_LOCK_TX, (void *) &card->ilock); | |
327 | return; | |
328 | } | |
329 | skb = card->sbuf; | |
330 | l = 0; | |
331 | while (skb->len) { | |
332 | if (act2000_isa_writeb(card, *(skb->data))) { | |
333 | /* Fifo is full, but more data to send */ | |
334 | test_and_clear_bit(ACT2000_LOCK_TX, (void *) &card->ilock); | |
335 | /* Schedule myself */ | |
336 | act2000_schedule_tx(card); | |
337 | return; | |
338 | } | |
339 | skb_pull(skb, 1); | |
340 | l++; | |
341 | } | |
342 | msg = (actcapi_msg *)card->ack_msg; | |
343 | if ((msg->hdr.cmd.cmd == 0x86) && | |
344 | (msg->hdr.cmd.subcmd == 0) ) { | |
345 | /* | |
346 | * If it's user data, reset data-ptr | |
347 | * and put skb into ackq. | |
348 | */ | |
349 | skb->data = card->ack_msg; | |
350 | /* Restore flags in message */ | |
351 | msg->msg.data_b3_req.flags = card->need_b3ack; | |
352 | skb_queue_tail(&card->ackq, skb); | |
353 | } else | |
354 | dev_kfree_skb(skb); | |
355 | card->sbuf = NULL; | |
356 | } | |
357 | } | |
358 | ||
359 | /* | |
360 | * Get firmware ID, check for 'ISDN' signature. | |
361 | */ | |
362 | static int | |
363 | act2000_isa_getid(act2000_card * card) | |
364 | { | |
365 | ||
366 | act2000_fwid fid; | |
367 | u_char *p = (u_char *) & fid; | |
368 | int count = 0; | |
369 | ||
370 | while (1) { | |
371 | if (count > 510) | |
372 | return -EPROTO; | |
373 | if (act2000_isa_readb(card, p++)) | |
374 | break; | |
375 | count++; | |
376 | } | |
377 | if (count <= 20) { | |
378 | printk(KERN_WARNING "act2000: No Firmware-ID!\n"); | |
379 | return -ETIME; | |
380 | } | |
381 | *p = '\0'; | |
382 | fid.revlen[0] = '\0'; | |
383 | if (strcmp(fid.isdn, "ISDN")) { | |
384 | printk(KERN_WARNING "act2000: Wrong Firmware-ID!\n"); | |
385 | return -EPROTO; | |
386 | } | |
387 | if ((p = strchr(fid.revision, '\n'))) | |
388 | *p = '\0'; | |
389 | printk(KERN_INFO "act2000: Firmware-ID: %s\n", fid.revision); | |
390 | if (card->flags & ACT2000_FLAGS_IVALID) { | |
391 | printk(KERN_DEBUG "Enabling Interrupts ...\n"); | |
392 | act2000_isa_enable_irq(card); | |
393 | } | |
394 | return 0; | |
395 | } | |
396 | ||
397 | /* | |
398 | * Download microcode into card, check Firmware signature. | |
399 | */ | |
400 | int | |
401 | act2000_isa_download(act2000_card * card, act2000_ddef __user * cb) | |
402 | { | |
403 | unsigned int length; | |
404 | int l; | |
405 | int c; | |
406 | long timeout; | |
407 | u_char *b; | |
408 | u_char __user *p; | |
409 | u_char *buf; | |
410 | act2000_ddef cblock; | |
411 | ||
412 | if (!act2000_isa_reset(card->port)) | |
413 | return -ENXIO; | |
414 | msleep_interruptible(500); | |
415 | if (copy_from_user(&cblock, cb, sizeof(cblock))) | |
416 | return -EFAULT; | |
417 | length = cblock.length; | |
418 | p = cblock.buffer; | |
419 | if (!access_ok(VERIFY_READ, p, length)) | |
420 | return -EFAULT; | |
421 | buf = (u_char *) kmalloc(1024, GFP_KERNEL); | |
422 | if (!buf) | |
423 | return -ENOMEM; | |
424 | timeout = 0; | |
425 | while (length) { | |
426 | l = (length > 1024) ? 1024 : length; | |
427 | c = 0; | |
428 | b = buf; | |
429 | if (copy_from_user(buf, p, l)) { | |
430 | kfree(buf); | |
431 | return -EFAULT; | |
432 | } | |
433 | while (c < l) { | |
434 | if (act2000_isa_writeb(card, *b++)) { | |
435 | printk(KERN_WARNING | |
436 | "act2000: loader timed out" | |
437 | " len=%d c=%d\n", length, c); | |
438 | kfree(buf); | |
439 | return -ETIME; | |
440 | } | |
441 | c++; | |
442 | } | |
443 | length -= l; | |
444 | p += l; | |
445 | } | |
446 | kfree(buf); | |
447 | msleep_interruptible(500); | |
448 | return (act2000_isa_getid(card)); | |
449 | } |