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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 | ||
1da177e4 LT |
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 | |
7d12e780 | 64 | act2000_isa_interrupt(int irq, void *dev_id) |
1da177e4 | 65 | { |
d87dbede | 66 | act2000_card *card = dev_id; |
1da177e4 LT |
67 | u_char istatus; |
68 | ||
1da177e4 LT |
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", 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. | |
c03983ac | 129 | * If irq is -1, choose next free irq, else irq is given explicitly. |
1da177e4 LT |
130 | */ |
131 | int | |
132 | act2000_isa_config_irq(act2000_card * card, short irq) | |
133 | { | |
134 | if (card->flags & ACT2000_FLAGS_IVALID) { | |
d87dbede | 135 | free_irq(card->irq, card); |
1da177e4 LT |
136 | } |
137 | card->flags &= ~ACT2000_FLAGS_IVALID; | |
138 | outb(ISA_COR_IRQOFF, ISA_PORT_COR); | |
139 | if (!irq) | |
140 | return 0; | |
141 | ||
d87dbede | 142 | if (!request_irq(irq, &act2000_isa_interrupt, 0, card->regname, card)) { |
1da177e4 | 143 | card->irq = irq; |
1da177e4 LT |
144 | card->flags |= ACT2000_FLAGS_IVALID; |
145 | printk(KERN_WARNING | |
146 | "act2000: Could not request irq %d\n",irq); | |
147 | return -EBUSY; | |
148 | } else { | |
149 | act2000_isa_select_irq(card); | |
150 | /* Disable READ and WRITE irq */ | |
151 | outb(0, ISA_PORT_SIS); | |
152 | outb(0, ISA_PORT_SOS); | |
153 | } | |
154 | return 0; | |
155 | } | |
156 | ||
157 | int | |
158 | act2000_isa_config_port(act2000_card * card, unsigned short portbase) | |
159 | { | |
160 | if (card->flags & ACT2000_FLAGS_PVALID) { | |
161 | release_region(card->port, ISA_REGION); | |
162 | card->flags &= ~ACT2000_FLAGS_PVALID; | |
163 | } | |
164 | if (request_region(portbase, ACT2000_PORTLEN, card->regname) == NULL) | |
165 | return -EBUSY; | |
166 | else { | |
167 | card->port = portbase; | |
168 | card->flags |= ACT2000_FLAGS_PVALID; | |
169 | return 0; | |
170 | } | |
171 | } | |
172 | ||
173 | /* | |
174 | * Release ressources, used by an adaptor. | |
175 | */ | |
176 | void | |
177 | act2000_isa_release(act2000_card * card) | |
178 | { | |
179 | unsigned long flags; | |
180 | ||
181 | spin_lock_irqsave(&card->lock, flags); | |
d87dbede JG |
182 | if (card->flags & ACT2000_FLAGS_IVALID) |
183 | free_irq(card->irq, card); | |
184 | ||
1da177e4 LT |
185 | card->flags &= ~ACT2000_FLAGS_IVALID; |
186 | if (card->flags & ACT2000_FLAGS_PVALID) | |
187 | release_region(card->port, ISA_REGION); | |
188 | card->flags &= ~ACT2000_FLAGS_PVALID; | |
189 | spin_unlock_irqrestore(&card->lock, flags); | |
190 | } | |
191 | ||
192 | static int | |
193 | act2000_isa_writeb(act2000_card * card, u_char data) | |
194 | { | |
195 | u_char timeout = 40; | |
196 | ||
197 | while (timeout) { | |
198 | if (inb(ISA_PORT_SOS) & ISA_SOS_READY) { | |
199 | outb(data, ISA_PORT_SDO); | |
200 | return 0; | |
201 | } else { | |
202 | timeout--; | |
203 | udelay(10); | |
204 | } | |
205 | } | |
206 | return 1; | |
207 | } | |
208 | ||
209 | static int | |
210 | act2000_isa_readb(act2000_card * card, u_char * data) | |
211 | { | |
212 | u_char timeout = 40; | |
213 | ||
214 | while (timeout) { | |
215 | if (inb(ISA_PORT_SIS) & ISA_SIS_READY) { | |
216 | *data = inb(ISA_PORT_SDI); | |
217 | return 0; | |
218 | } else { | |
219 | timeout--; | |
220 | udelay(10); | |
221 | } | |
222 | } | |
223 | return 1; | |
224 | } | |
225 | ||
226 | void | |
227 | act2000_isa_receive(act2000_card *card) | |
228 | { | |
229 | u_char c; | |
230 | ||
231 | if (test_and_set_bit(ACT2000_LOCK_RX, (void *) &card->ilock) != 0) | |
232 | return; | |
233 | while (!act2000_isa_readb(card, &c)) { | |
234 | if (card->idat.isa.rcvidx < 8) { | |
235 | card->idat.isa.rcvhdr[card->idat.isa.rcvidx++] = c; | |
236 | if (card->idat.isa.rcvidx == 8) { | |
237 | int valid = actcapi_chkhdr(card, (actcapi_msghdr *)&card->idat.isa.rcvhdr); | |
238 | ||
239 | if (valid) { | |
240 | card->idat.isa.rcvlen = ((actcapi_msghdr *)&card->idat.isa.rcvhdr)->len; | |
241 | card->idat.isa.rcvskb = dev_alloc_skb(card->idat.isa.rcvlen); | |
242 | if (card->idat.isa.rcvskb == NULL) { | |
243 | card->idat.isa.rcvignore = 1; | |
244 | printk(KERN_WARNING | |
245 | "act2000_isa_receive: no memory\n"); | |
246 | test_and_clear_bit(ACT2000_LOCK_RX, (void *) &card->ilock); | |
247 | return; | |
248 | } | |
249 | memcpy(skb_put(card->idat.isa.rcvskb, 8), card->idat.isa.rcvhdr, 8); | |
250 | card->idat.isa.rcvptr = skb_put(card->idat.isa.rcvskb, card->idat.isa.rcvlen - 8); | |
251 | } else { | |
252 | card->idat.isa.rcvidx = 0; | |
253 | printk(KERN_WARNING | |
254 | "act2000_isa_receive: Invalid CAPI msg\n"); | |
255 | { | |
256 | int i; __u8 *p; __u8 *c; __u8 tmp[30]; | |
257 | for (i = 0, p = (__u8 *)&card->idat.isa.rcvhdr, c = tmp; i < 8; i++) | |
258 | c += sprintf(c, "%02x ", *(p++)); | |
259 | printk(KERN_WARNING "act2000_isa_receive: %s\n", tmp); | |
260 | } | |
261 | } | |
262 | } | |
263 | } else { | |
264 | if (!card->idat.isa.rcvignore) | |
265 | *card->idat.isa.rcvptr++ = c; | |
266 | if (++card->idat.isa.rcvidx >= card->idat.isa.rcvlen) { | |
267 | if (!card->idat.isa.rcvignore) { | |
268 | skb_queue_tail(&card->rcvq, card->idat.isa.rcvskb); | |
269 | act2000_schedule_rx(card); | |
270 | } | |
271 | card->idat.isa.rcvidx = 0; | |
272 | card->idat.isa.rcvlen = 8; | |
273 | card->idat.isa.rcvignore = 0; | |
274 | card->idat.isa.rcvskb = NULL; | |
275 | card->idat.isa.rcvptr = card->idat.isa.rcvhdr; | |
276 | } | |
277 | } | |
278 | } | |
279 | if (!(card->flags & ACT2000_FLAGS_IVALID)) { | |
280 | /* In polling mode, schedule myself */ | |
281 | if ((card->idat.isa.rcvidx) && | |
282 | (card->idat.isa.rcvignore || | |
283 | (card->idat.isa.rcvidx < card->idat.isa.rcvlen))) | |
284 | act2000_schedule_poll(card); | |
285 | } | |
286 | test_and_clear_bit(ACT2000_LOCK_RX, (void *) &card->ilock); | |
287 | } | |
288 | ||
289 | void | |
290 | act2000_isa_send(act2000_card * card) | |
291 | { | |
292 | unsigned long flags; | |
293 | struct sk_buff *skb; | |
294 | actcapi_msg *msg; | |
295 | int l; | |
296 | ||
297 | if (test_and_set_bit(ACT2000_LOCK_TX, (void *) &card->ilock) != 0) | |
298 | return; | |
299 | while (1) { | |
300 | spin_lock_irqsave(&card->lock, flags); | |
301 | if (!(card->sbuf)) { | |
302 | if ((card->sbuf = skb_dequeue(&card->sndq))) { | |
303 | card->ack_msg = card->sbuf->data; | |
304 | msg = (actcapi_msg *)card->sbuf->data; | |
305 | if ((msg->hdr.cmd.cmd == 0x86) && | |
306 | (msg->hdr.cmd.subcmd == 0) ) { | |
307 | /* Save flags in message */ | |
308 | card->need_b3ack = msg->msg.data_b3_req.flags; | |
309 | msg->msg.data_b3_req.flags = 0; | |
310 | } | |
311 | } | |
312 | } | |
313 | spin_unlock_irqrestore(&card->lock, flags); | |
314 | if (!(card->sbuf)) { | |
315 | /* No more data to send */ | |
316 | test_and_clear_bit(ACT2000_LOCK_TX, (void *) &card->ilock); | |
317 | return; | |
318 | } | |
319 | skb = card->sbuf; | |
320 | l = 0; | |
321 | while (skb->len) { | |
322 | if (act2000_isa_writeb(card, *(skb->data))) { | |
323 | /* Fifo is full, but more data to send */ | |
324 | test_and_clear_bit(ACT2000_LOCK_TX, (void *) &card->ilock); | |
325 | /* Schedule myself */ | |
326 | act2000_schedule_tx(card); | |
327 | return; | |
328 | } | |
329 | skb_pull(skb, 1); | |
330 | l++; | |
331 | } | |
332 | msg = (actcapi_msg *)card->ack_msg; | |
333 | if ((msg->hdr.cmd.cmd == 0x86) && | |
334 | (msg->hdr.cmd.subcmd == 0) ) { | |
335 | /* | |
336 | * If it's user data, reset data-ptr | |
337 | * and put skb into ackq. | |
338 | */ | |
339 | skb->data = card->ack_msg; | |
340 | /* Restore flags in message */ | |
341 | msg->msg.data_b3_req.flags = card->need_b3ack; | |
342 | skb_queue_tail(&card->ackq, skb); | |
343 | } else | |
344 | dev_kfree_skb(skb); | |
345 | card->sbuf = NULL; | |
346 | } | |
347 | } | |
348 | ||
349 | /* | |
350 | * Get firmware ID, check for 'ISDN' signature. | |
351 | */ | |
352 | static int | |
353 | act2000_isa_getid(act2000_card * card) | |
354 | { | |
355 | ||
356 | act2000_fwid fid; | |
357 | u_char *p = (u_char *) & fid; | |
358 | int count = 0; | |
359 | ||
360 | while (1) { | |
361 | if (count > 510) | |
362 | return -EPROTO; | |
363 | if (act2000_isa_readb(card, p++)) | |
364 | break; | |
365 | count++; | |
366 | } | |
367 | if (count <= 20) { | |
368 | printk(KERN_WARNING "act2000: No Firmware-ID!\n"); | |
369 | return -ETIME; | |
370 | } | |
371 | *p = '\0'; | |
372 | fid.revlen[0] = '\0'; | |
373 | if (strcmp(fid.isdn, "ISDN")) { | |
374 | printk(KERN_WARNING "act2000: Wrong Firmware-ID!\n"); | |
375 | return -EPROTO; | |
376 | } | |
377 | if ((p = strchr(fid.revision, '\n'))) | |
378 | *p = '\0'; | |
379 | printk(KERN_INFO "act2000: Firmware-ID: %s\n", fid.revision); | |
380 | if (card->flags & ACT2000_FLAGS_IVALID) { | |
381 | printk(KERN_DEBUG "Enabling Interrupts ...\n"); | |
382 | act2000_isa_enable_irq(card); | |
383 | } | |
384 | return 0; | |
385 | } | |
386 | ||
387 | /* | |
388 | * Download microcode into card, check Firmware signature. | |
389 | */ | |
390 | int | |
391 | act2000_isa_download(act2000_card * card, act2000_ddef __user * cb) | |
392 | { | |
393 | unsigned int length; | |
394 | int l; | |
395 | int c; | |
396 | long timeout; | |
397 | u_char *b; | |
398 | u_char __user *p; | |
399 | u_char *buf; | |
400 | act2000_ddef cblock; | |
401 | ||
402 | if (!act2000_isa_reset(card->port)) | |
403 | return -ENXIO; | |
404 | msleep_interruptible(500); | |
405 | if (copy_from_user(&cblock, cb, sizeof(cblock))) | |
406 | return -EFAULT; | |
407 | length = cblock.length; | |
408 | p = cblock.buffer; | |
409 | if (!access_ok(VERIFY_READ, p, length)) | |
410 | return -EFAULT; | |
5cbded58 | 411 | buf = kmalloc(1024, GFP_KERNEL); |
1da177e4 LT |
412 | if (!buf) |
413 | return -ENOMEM; | |
414 | timeout = 0; | |
415 | while (length) { | |
416 | l = (length > 1024) ? 1024 : length; | |
417 | c = 0; | |
418 | b = buf; | |
419 | if (copy_from_user(buf, p, l)) { | |
420 | kfree(buf); | |
421 | return -EFAULT; | |
422 | } | |
423 | while (c < l) { | |
424 | if (act2000_isa_writeb(card, *b++)) { | |
425 | printk(KERN_WARNING | |
426 | "act2000: loader timed out" | |
427 | " len=%d c=%d\n", length, c); | |
428 | kfree(buf); | |
429 | return -ETIME; | |
430 | } | |
431 | c++; | |
432 | } | |
433 | length -= l; | |
434 | p += l; | |
435 | } | |
436 | kfree(buf); | |
437 | msleep_interruptible(500); | |
438 | return (act2000_isa_getid(card)); | |
439 | } |