IRQ: Maintain regs pointer globally rather than passing to IRQ handlers
[linux-2.6.git] / drivers / isdn / hisax / asuscom.c
1 /* $Id: asuscom.c,v 1.14.2.4 2004/01/13 23:48:39 keil Exp $
2  *
3  * low level stuff for ASUSCOM NETWORK INC. ISDNLink cards
4  *
5  * Author       Karsten Keil
6  * Copyright    by Karsten Keil      <keil@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  ASUSCOM NETWORK INC. Taiwan and  Dynalink NL for information
12  *
13  */
14
15 #include <linux/init.h>
16 #include <linux/isapnp.h>
17 #include "hisax.h"
18 #include "isac.h"
19 #include "ipac.h"
20 #include "hscx.h"
21 #include "isdnl1.h"
22
23 extern const char *CardType[];
24
25 static const char *Asuscom_revision = "$Revision: 1.14.2.4 $";
26
27 #define byteout(addr,val) outb(val,addr)
28 #define bytein(addr) inb(addr)
29
30 #define ASUS_ISAC       0
31 #define ASUS_HSCX       1
32 #define ASUS_ADR        2
33 #define ASUS_CTRL_U7    3
34 #define ASUS_CTRL_POTS  5
35
36 #define ASUS_IPAC_ALE   0
37 #define ASUS_IPAC_DATA  1
38
39 #define ASUS_ISACHSCX   1
40 #define ASUS_IPAC       2
41
42 /* CARD_ADR (Write) */
43 #define ASUS_RESET      0x80    /* Bit 7 Reset-Leitung */
44
45 static inline u_char
46 readreg(unsigned int ale, unsigned int adr, u_char off)
47 {
48         register u_char ret;
49
50         byteout(ale, off);
51         ret = bytein(adr);
52         return (ret);
53 }
54
55 static inline void
56 readfifo(unsigned int ale, unsigned int adr, u_char off, u_char * data, int size)
57 {
58         byteout(ale, off);
59         insb(adr, data, size);
60 }
61
62
63 static inline void
64 writereg(unsigned int ale, unsigned int adr, u_char off, u_char data)
65 {
66         byteout(ale, off);
67         byteout(adr, data);
68 }
69
70 static inline void
71 writefifo(unsigned int ale, unsigned int adr, u_char off, u_char * data, int size)
72 {
73         byteout(ale, off);
74         outsb(adr, data, size);
75 }
76
77 /* Interface functions */
78
79 static u_char
80 ReadISAC(struct IsdnCardState *cs, u_char offset)
81 {
82         return (readreg(cs->hw.asus.adr, cs->hw.asus.isac, offset));
83 }
84
85 static void
86 WriteISAC(struct IsdnCardState *cs, u_char offset, u_char value)
87 {
88         writereg(cs->hw.asus.adr, cs->hw.asus.isac, offset, value);
89 }
90
91 static void
92 ReadISACfifo(struct IsdnCardState *cs, u_char * data, int size)
93 {
94         readfifo(cs->hw.asus.adr, cs->hw.asus.isac, 0, data, size);
95 }
96
97 static void
98 WriteISACfifo(struct IsdnCardState *cs, u_char * data, int size)
99 {
100         writefifo(cs->hw.asus.adr, cs->hw.asus.isac, 0, data, size);
101 }
102
103 static u_char
104 ReadISAC_IPAC(struct IsdnCardState *cs, u_char offset)
105 {
106         return (readreg(cs->hw.asus.adr, cs->hw.asus.isac, offset|0x80));
107 }
108
109 static void
110 WriteISAC_IPAC(struct IsdnCardState *cs, u_char offset, u_char value)
111 {
112         writereg(cs->hw.asus.adr, cs->hw.asus.isac, offset|0x80, value);
113 }
114
115 static void
116 ReadISACfifo_IPAC(struct IsdnCardState *cs, u_char * data, int size)
117 {
118         readfifo(cs->hw.asus.adr, cs->hw.asus.isac, 0x80, data, size);
119 }
120
121 static void
122 WriteISACfifo_IPAC(struct IsdnCardState *cs, u_char * data, int size)
123 {
124         writefifo(cs->hw.asus.adr, cs->hw.asus.isac, 0x80, data, size);
125 }
126
127 static u_char
128 ReadHSCX(struct IsdnCardState *cs, int hscx, u_char offset)
129 {
130         return (readreg(cs->hw.asus.adr,
131                         cs->hw.asus.hscx, offset + (hscx ? 0x40 : 0)));
132 }
133
134 static void
135 WriteHSCX(struct IsdnCardState *cs, int hscx, u_char offset, u_char value)
136 {
137         writereg(cs->hw.asus.adr,
138                  cs->hw.asus.hscx, offset + (hscx ? 0x40 : 0), value);
139 }
140
141 /*
142  * fast interrupt HSCX stuff goes here
143  */
144
145 #define READHSCX(cs, nr, reg) readreg(cs->hw.asus.adr, \
146                 cs->hw.asus.hscx, reg + (nr ? 0x40 : 0))
147 #define WRITEHSCX(cs, nr, reg, data) writereg(cs->hw.asus.adr, \
148                 cs->hw.asus.hscx, reg + (nr ? 0x40 : 0), data)
149
150 #define READHSCXFIFO(cs, nr, ptr, cnt) readfifo(cs->hw.asus.adr, \
151                 cs->hw.asus.hscx, (nr ? 0x40 : 0), ptr, cnt)
152
153 #define WRITEHSCXFIFO(cs, nr, ptr, cnt) writefifo(cs->hw.asus.adr, \
154                 cs->hw.asus.hscx, (nr ? 0x40 : 0), ptr, cnt)
155
156 #include "hscx_irq.c"
157
158 static irqreturn_t
159 asuscom_interrupt(int intno, void *dev_id)
160 {
161         struct IsdnCardState *cs = dev_id;
162         u_char val;
163         u_long flags;
164
165         spin_lock_irqsave(&cs->lock, flags);
166         val = readreg(cs->hw.asus.adr, cs->hw.asus.hscx, HSCX_ISTA + 0x40);
167       Start_HSCX:
168         if (val)
169                 hscx_int_main(cs, val);
170         val = readreg(cs->hw.asus.adr, cs->hw.asus.isac, ISAC_ISTA);
171       Start_ISAC:
172         if (val)
173                 isac_interrupt(cs, val);
174         val = readreg(cs->hw.asus.adr, cs->hw.asus.hscx, HSCX_ISTA + 0x40);
175         if (val) {
176                 if (cs->debug & L1_DEB_HSCX)
177                         debugl1(cs, "HSCX IntStat after IntRoutine");
178                 goto Start_HSCX;
179         }
180         val = readreg(cs->hw.asus.adr, cs->hw.asus.isac, ISAC_ISTA);
181         if (val) {
182                 if (cs->debug & L1_DEB_ISAC)
183                         debugl1(cs, "ISAC IntStat after IntRoutine");
184                 goto Start_ISAC;
185         }
186         writereg(cs->hw.asus.adr, cs->hw.asus.hscx, HSCX_MASK, 0xFF);
187         writereg(cs->hw.asus.adr, cs->hw.asus.hscx, HSCX_MASK + 0x40, 0xFF);
188         writereg(cs->hw.asus.adr, cs->hw.asus.isac, ISAC_MASK, 0xFF);
189         writereg(cs->hw.asus.adr, cs->hw.asus.isac, ISAC_MASK, 0x0);
190         writereg(cs->hw.asus.adr, cs->hw.asus.hscx, HSCX_MASK, 0x0);
191         writereg(cs->hw.asus.adr, cs->hw.asus.hscx, HSCX_MASK + 0x40, 0x0);
192         spin_unlock_irqrestore(&cs->lock, flags);
193         return IRQ_HANDLED;
194 }
195
196 static irqreturn_t
197 asuscom_interrupt_ipac(int intno, void *dev_id)
198 {
199         struct IsdnCardState *cs = dev_id;
200         u_char ista, val, icnt = 5;
201         u_long flags;
202
203         spin_lock_irqsave(&cs->lock, flags);
204         ista = readreg(cs->hw.asus.adr, cs->hw.asus.isac, IPAC_ISTA);
205 Start_IPAC:
206         if (cs->debug & L1_DEB_IPAC)
207                 debugl1(cs, "IPAC ISTA %02X", ista);
208         if (ista & 0x0f) {
209                 val = readreg(cs->hw.asus.adr, cs->hw.asus.hscx, HSCX_ISTA + 0x40);
210                 if (ista & 0x01)
211                         val |= 0x01;
212                 if (ista & 0x04)
213                         val |= 0x02;
214                 if (ista & 0x08)
215                         val |= 0x04;
216                 if (val)
217                         hscx_int_main(cs, val);
218         }
219         if (ista & 0x20) {
220                 val = 0xfe & readreg(cs->hw.asus.adr, cs->hw.asus.isac, ISAC_ISTA | 0x80);
221                 if (val) {
222                         isac_interrupt(cs, val);
223                 }
224         }
225         if (ista & 0x10) {
226                 val = 0x01;
227                 isac_interrupt(cs, val);
228         }
229         ista  = readreg(cs->hw.asus.adr, cs->hw.asus.isac, IPAC_ISTA);
230         if ((ista & 0x3f) && icnt) {
231                 icnt--;
232                 goto Start_IPAC;
233         }
234         if (!icnt)
235                 printk(KERN_WARNING "ASUS IRQ LOOP\n");
236         writereg(cs->hw.asus.adr, cs->hw.asus.isac, IPAC_MASK, 0xFF);
237         writereg(cs->hw.asus.adr, cs->hw.asus.isac, IPAC_MASK, 0xC0);
238         spin_unlock_irqrestore(&cs->lock, flags);
239         return IRQ_HANDLED;
240 }
241
242 static void
243 release_io_asuscom(struct IsdnCardState *cs)
244 {
245         int bytecnt = 8;
246
247         if (cs->hw.asus.cfg_reg)
248                 release_region(cs->hw.asus.cfg_reg, bytecnt);
249 }
250
251 static void
252 reset_asuscom(struct IsdnCardState *cs)
253 {
254         if (cs->subtyp == ASUS_IPAC)
255                 writereg(cs->hw.asus.adr, cs->hw.asus.isac, IPAC_POTA2, 0x20);
256         else
257                 byteout(cs->hw.asus.adr, ASUS_RESET);   /* Reset On */
258         mdelay(10);
259         if (cs->subtyp == ASUS_IPAC)
260                 writereg(cs->hw.asus.adr, cs->hw.asus.isac, IPAC_POTA2, 0x0);
261         else
262                 byteout(cs->hw.asus.adr, 0);    /* Reset Off */
263         mdelay(10);
264         if (cs->subtyp == ASUS_IPAC) {
265                 writereg(cs->hw.asus.adr, cs->hw.asus.isac, IPAC_CONF, 0x0);
266                 writereg(cs->hw.asus.adr, cs->hw.asus.isac, IPAC_ACFG, 0xff);
267                 writereg(cs->hw.asus.adr, cs->hw.asus.isac, IPAC_AOE, 0x0);
268                 writereg(cs->hw.asus.adr, cs->hw.asus.isac, IPAC_MASK, 0xc0);
269                 writereg(cs->hw.asus.adr, cs->hw.asus.isac, IPAC_PCFG, 0x12);
270         }
271 }
272
273 static int
274 Asus_card_msg(struct IsdnCardState *cs, int mt, void *arg)
275 {
276         u_long flags;
277
278         switch (mt) {
279                 case CARD_RESET:
280                         spin_lock_irqsave(&cs->lock, flags);
281                         reset_asuscom(cs);
282                         spin_unlock_irqrestore(&cs->lock, flags);
283                         return(0);
284                 case CARD_RELEASE:
285                         release_io_asuscom(cs);
286                         return(0);
287                 case CARD_INIT:
288                         spin_lock_irqsave(&cs->lock, flags);
289                         cs->debug |= L1_DEB_IPAC;
290                         inithscxisac(cs, 3);
291                         spin_unlock_irqrestore(&cs->lock, flags);
292                         return(0);
293                 case CARD_TEST:
294                         return(0);
295         }
296         return(0);
297 }
298
299 #ifdef __ISAPNP__
300 static struct isapnp_device_id asus_ids[] __devinitdata = {
301         { ISAPNP_VENDOR('A', 'S', 'U'), ISAPNP_FUNCTION(0x1688),
302           ISAPNP_VENDOR('A', 'S', 'U'), ISAPNP_FUNCTION(0x1688), 
303           (unsigned long) "Asus1688 PnP" },
304         { ISAPNP_VENDOR('A', 'S', 'U'), ISAPNP_FUNCTION(0x1690),
305           ISAPNP_VENDOR('A', 'S', 'U'), ISAPNP_FUNCTION(0x1690), 
306           (unsigned long) "Asus1690 PnP" },
307         { ISAPNP_VENDOR('S', 'I', 'E'), ISAPNP_FUNCTION(0x0020),
308           ISAPNP_VENDOR('S', 'I', 'E'), ISAPNP_FUNCTION(0x0020), 
309           (unsigned long) "Isurf2 PnP" },
310         { ISAPNP_VENDOR('E', 'L', 'F'), ISAPNP_FUNCTION(0x0000),
311           ISAPNP_VENDOR('E', 'L', 'F'), ISAPNP_FUNCTION(0x0000), 
312           (unsigned long) "Iscas TE320" },
313         { 0, }
314 };
315
316 static struct isapnp_device_id *ipid __devinitdata = &asus_ids[0];
317 static struct pnp_card *pnp_c __devinitdata = NULL;
318 #endif
319
320 int __devinit
321 setup_asuscom(struct IsdnCard *card)
322 {
323         int bytecnt;
324         struct IsdnCardState *cs = card->cs;
325         u_char val;
326         char tmp[64];
327
328         strcpy(tmp, Asuscom_revision);
329         printk(KERN_INFO "HiSax: Asuscom ISDNLink driver Rev. %s\n", HiSax_getrev(tmp));
330         if (cs->typ != ISDN_CTYPE_ASUSCOM)
331                 return (0);
332 #ifdef __ISAPNP__
333         if (!card->para[1] && isapnp_present()) {
334                 struct pnp_dev *pnp_d;
335                 while(ipid->card_vendor) {
336                         if ((pnp_c = pnp_find_card(ipid->card_vendor,
337                                 ipid->card_device, pnp_c))) {
338                                 pnp_d = NULL;
339                                 if ((pnp_d = pnp_find_dev(pnp_c,
340                                         ipid->vendor, ipid->function, pnp_d))) {
341                                         int err;
342
343                                         printk(KERN_INFO "HiSax: %s detected\n",
344                                                 (char *)ipid->driver_data);
345                                         pnp_disable_dev(pnp_d);
346                                         err = pnp_activate_dev(pnp_d);
347                                         if (err<0) {
348                                                 printk(KERN_WARNING "%s: pnp_activate_dev ret(%d)\n",
349                                                         __FUNCTION__, err);
350                                                 return(0);
351                                         }
352                                         card->para[1] = pnp_port_start(pnp_d, 0);
353                                         card->para[0] = pnp_irq(pnp_d, 0);
354                                         if (!card->para[0] || !card->para[1]) {
355                                                 printk(KERN_ERR "AsusPnP:some resources are missing %ld/%lx\n",
356                                                         card->para[0], card->para[1]);
357                                                 pnp_disable_dev(pnp_d);
358                                                 return(0);
359                                         }
360                                         break;
361                                 } else {
362                                         printk(KERN_ERR "AsusPnP: PnP error card found, no device\n");
363                                 }
364                         }
365                         ipid++;
366                         pnp_c = NULL;
367                 } 
368                 if (!ipid->card_vendor) {
369                         printk(KERN_INFO "AsusPnP: no ISAPnP card found\n");
370                         return(0);
371                 }
372         }
373 #endif
374         bytecnt = 8;
375         cs->hw.asus.cfg_reg = card->para[1];
376         cs->irq = card->para[0];
377         if (!request_region(cs->hw.asus.cfg_reg, bytecnt, "asuscom isdn")) {
378                 printk(KERN_WARNING
379                        "HiSax: %s config port %x-%x already in use\n",
380                        CardType[card->typ],
381                        cs->hw.asus.cfg_reg,
382                        cs->hw.asus.cfg_reg + bytecnt);
383                 return (0);
384         }
385         printk(KERN_INFO "ISDNLink: defined at 0x%x IRQ %d\n",
386                 cs->hw.asus.cfg_reg, cs->irq);
387         setup_isac(cs);
388         cs->BC_Read_Reg = &ReadHSCX;
389         cs->BC_Write_Reg = &WriteHSCX;
390         cs->BC_Send_Data = &hscx_fill_fifo;
391         cs->cardmsg = &Asus_card_msg;
392         val = readreg(cs->hw.asus.cfg_reg + ASUS_IPAC_ALE, 
393                 cs->hw.asus.cfg_reg + ASUS_IPAC_DATA, IPAC_ID);
394         if ((val == 1) || (val == 2)) {
395                 cs->subtyp = ASUS_IPAC;
396                 cs->hw.asus.adr  = cs->hw.asus.cfg_reg + ASUS_IPAC_ALE;
397                 cs->hw.asus.isac = cs->hw.asus.cfg_reg + ASUS_IPAC_DATA;
398                 cs->hw.asus.hscx = cs->hw.asus.cfg_reg + ASUS_IPAC_DATA;
399                 test_and_set_bit(HW_IPAC, &cs->HW_Flags);
400                 cs->readisac = &ReadISAC_IPAC;
401                 cs->writeisac = &WriteISAC_IPAC;
402                 cs->readisacfifo = &ReadISACfifo_IPAC;
403                 cs->writeisacfifo = &WriteISACfifo_IPAC;
404                 cs->irq_func = &asuscom_interrupt_ipac;
405                 printk(KERN_INFO "Asus: IPAC version %x\n", val);
406         } else {
407                 cs->subtyp = ASUS_ISACHSCX;
408                 cs->hw.asus.adr = cs->hw.asus.cfg_reg + ASUS_ADR;
409                 cs->hw.asus.isac = cs->hw.asus.cfg_reg + ASUS_ISAC;
410                 cs->hw.asus.hscx = cs->hw.asus.cfg_reg + ASUS_HSCX;
411                 cs->hw.asus.u7 = cs->hw.asus.cfg_reg + ASUS_CTRL_U7;
412                 cs->hw.asus.pots = cs->hw.asus.cfg_reg + ASUS_CTRL_POTS;
413                 cs->readisac = &ReadISAC;
414                 cs->writeisac = &WriteISAC;
415                 cs->readisacfifo = &ReadISACfifo;
416                 cs->writeisacfifo = &WriteISACfifo;
417                 cs->irq_func = &asuscom_interrupt;
418                 ISACVersion(cs, "ISDNLink:");
419                 if (HscxVersion(cs, "ISDNLink:")) {
420                         printk(KERN_WARNING
421                         "ISDNLink: wrong HSCX versions check IO address\n");
422                         release_io_asuscom(cs);
423                         return (0);
424                 }
425         }
426         return (1);
427 }