IRQ: Maintain regs pointer globally rather than passing to IRQ handlers
[linux-2.6.git] / drivers / pcmcia / i82092.c
1 /* 
2  * Driver for Intel I82092AA PCI-PCMCIA bridge.
3  *
4  * (C) 2001 Red Hat, Inc.
5  *
6  * Author: Arjan Van De Ven <arjanv@redhat.com>
7  * Loosly based on i82365.c from the pcmcia-cs package
8  *
9  * $Id: i82092aa.c,v 1.2 2001/10/23 14:43:34 arjanv Exp $
10  */
11
12 #include <linux/kernel.h>
13 #include <linux/module.h>
14 #include <linux/pci.h>
15 #include <linux/init.h>
16 #include <linux/workqueue.h>
17 #include <linux/interrupt.h>
18 #include <linux/device.h>
19
20 #include <pcmcia/cs_types.h>
21 #include <pcmcia/ss.h>
22 #include <pcmcia/cs.h>
23
24 #include <asm/system.h>
25 #include <asm/io.h>
26
27 #include "i82092aa.h"
28 #include "i82365.h"
29
30 MODULE_LICENSE("GPL");
31
32 /* PCI core routines */
33 static struct pci_device_id i82092aa_pci_ids[] = {
34         {
35               .vendor = PCI_VENDOR_ID_INTEL,
36               .device = PCI_DEVICE_ID_INTEL_82092AA_0,
37               .subvendor = PCI_ANY_ID,
38               .subdevice = PCI_ANY_ID,
39          },
40          {} 
41 };
42 MODULE_DEVICE_TABLE(pci, i82092aa_pci_ids);
43
44 static int i82092aa_socket_suspend (struct pci_dev *dev, pm_message_t state)
45 {
46         return pcmcia_socket_dev_suspend(&dev->dev, state);
47 }
48
49 static int i82092aa_socket_resume (struct pci_dev *dev)
50 {
51         return pcmcia_socket_dev_resume(&dev->dev);
52 }
53
54 static struct pci_driver i82092aa_pci_drv = {
55         .name           = "i82092aa",
56         .id_table       = i82092aa_pci_ids,
57         .probe          = i82092aa_pci_probe,
58         .remove         = __devexit_p(i82092aa_pci_remove),
59         .suspend        = i82092aa_socket_suspend,
60         .resume         = i82092aa_socket_resume,
61 };
62
63
64 /* the pccard structure and its functions */
65 static struct pccard_operations i82092aa_operations = {
66         .init                   = i82092aa_init,
67         .get_status             = i82092aa_get_status,
68         .set_socket             = i82092aa_set_socket,
69         .set_io_map             = i82092aa_set_io_map,
70         .set_mem_map            = i82092aa_set_mem_map,
71 };
72
73 /* The card can do upto 4 sockets, allocate a structure for each of them */
74
75 struct socket_info {
76         int     number;
77         int     card_state;     /*  0 = no socket,
78                                     1 = empty socket, 
79                                     2 = card but not initialized,
80                                     3 = operational card */
81         kio_addr_t io_base;     /* base io address of the socket */
82         
83         struct pcmcia_socket socket;
84         struct pci_dev *dev;    /* The PCI device for the socket */
85 };
86
87 #define MAX_SOCKETS 4
88 static struct socket_info sockets[MAX_SOCKETS];
89 static int socket_count;  /* shortcut */                                                                                
90
91
92 static int __devinit i82092aa_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
93 {
94         unsigned char configbyte;
95         int i, ret;
96         
97         enter("i82092aa_pci_probe");
98         
99         if ((ret = pci_enable_device(dev)))
100                 return ret;
101                 
102         pci_read_config_byte(dev, 0x40, &configbyte);  /* PCI Configuration Control */
103         switch(configbyte&6) {
104                 case 0:
105                         socket_count = 2;
106                         break;
107                 case 2:
108                         socket_count = 1;
109                         break;
110                 case 4:
111                 case 6:
112                         socket_count = 4;
113                         break;
114                         
115                 default:
116                         printk(KERN_ERR "i82092aa: Oops, you did something we didn't think of.\n");
117                         ret = -EIO;
118                         goto err_out_disable;
119         }
120         printk(KERN_INFO "i82092aa: configured as a %d socket device.\n", socket_count);
121
122         if (!request_region(pci_resource_start(dev, 0), 2, "i82092aa")) {
123                 ret = -EBUSY;
124                 goto err_out_disable;
125         }
126         
127         for (i = 0;i<socket_count;i++) {
128                 sockets[i].card_state = 1; /* 1 = present but empty */
129                 sockets[i].io_base = pci_resource_start(dev, 0);
130                 sockets[i].socket.features |= SS_CAP_PCCARD;
131                 sockets[i].socket.map_size = 0x1000;
132                 sockets[i].socket.irq_mask = 0;
133                 sockets[i].socket.pci_irq  = dev->irq;
134                 sockets[i].socket.owner = THIS_MODULE;
135
136                 sockets[i].number = i;
137                 
138                 if (card_present(i)) {
139                         sockets[i].card_state = 3;
140                         dprintk(KERN_DEBUG "i82092aa: slot %i is occupied\n",i);
141                 } else {
142                         dprintk(KERN_DEBUG "i82092aa: slot %i is vacant\n",i);
143                 }
144         }
145                 
146         /* Now, specifiy that all interrupts are to be done as PCI interrupts */
147         configbyte = 0xFF; /* bitmask, one bit per event, 1 = PCI interrupt, 0 = ISA interrupt */
148         pci_write_config_byte(dev, 0x50, configbyte); /* PCI Interrupt Routing Register */
149
150         /* Register the interrupt handler */
151         dprintk(KERN_DEBUG "Requesting interrupt %i \n",dev->irq);
152         if ((ret = request_irq(dev->irq, i82092aa_interrupt, IRQF_SHARED, "i82092aa", i82092aa_interrupt))) {
153                 printk(KERN_ERR "i82092aa: Failed to register IRQ %d, aborting\n", dev->irq);
154                 goto err_out_free_res;
155         }
156
157         pci_set_drvdata(dev, &sockets[i].socket);
158
159         for (i = 0; i<socket_count; i++) {
160                 sockets[i].socket.dev.dev = &dev->dev;
161                 sockets[i].socket.ops = &i82092aa_operations;
162                 sockets[i].socket.resource_ops = &pccard_nonstatic_ops;
163                 ret = pcmcia_register_socket(&sockets[i].socket);
164                 if (ret) {
165                         goto err_out_free_sockets;
166                 }
167         }
168
169         leave("i82092aa_pci_probe");
170         return 0;
171
172 err_out_free_sockets:
173         if (i) {
174                 for (i--;i>=0;i--) {
175                         pcmcia_unregister_socket(&sockets[i].socket);
176                 }
177         }
178         free_irq(dev->irq, i82092aa_interrupt);
179 err_out_free_res:
180         release_region(pci_resource_start(dev, 0), 2);
181 err_out_disable:
182         pci_disable_device(dev);
183         return ret;                     
184 }
185
186 static void __devexit i82092aa_pci_remove(struct pci_dev *dev)
187 {
188         struct pcmcia_socket *socket = pci_get_drvdata(dev);
189
190         enter("i82092aa_pci_remove");
191         
192         free_irq(dev->irq, i82092aa_interrupt);
193
194         if (socket)
195                 pcmcia_unregister_socket(socket);
196
197         leave("i82092aa_pci_remove");
198 }
199
200 static DEFINE_SPINLOCK(port_lock);
201
202 /* basic value read/write functions */
203
204 static unsigned char indirect_read(int socket, unsigned short reg)
205 {
206         unsigned short int port;
207         unsigned char val;
208         unsigned long flags;
209         spin_lock_irqsave(&port_lock,flags);
210         reg += socket * 0x40;
211         port = sockets[socket].io_base;
212         outb(reg,port);
213         val = inb(port+1);
214         spin_unlock_irqrestore(&port_lock,flags);
215         return val;
216 }
217
218 #if 0
219 static unsigned short indirect_read16(int socket, unsigned short reg)
220 {
221         unsigned short int port;
222         unsigned short tmp;
223         unsigned long flags;
224         spin_lock_irqsave(&port_lock,flags);
225         reg  = reg + socket * 0x40;
226         port = sockets[socket].io_base;
227         outb(reg,port);
228         tmp = inb(port+1);
229         reg++;
230         outb(reg,port);
231         tmp = tmp | (inb(port+1)<<8);
232         spin_unlock_irqrestore(&port_lock,flags);
233         return tmp;
234 }
235 #endif
236
237 static void indirect_write(int socket, unsigned short reg, unsigned char value)
238 {
239         unsigned short int port;
240         unsigned long flags;
241         spin_lock_irqsave(&port_lock,flags);
242         reg = reg + socket * 0x40;
243         port = sockets[socket].io_base; 
244         outb(reg,port);
245         outb(value,port+1);
246         spin_unlock_irqrestore(&port_lock,flags);
247 }
248
249 static void indirect_setbit(int socket, unsigned short reg, unsigned char mask)
250 {
251         unsigned short int port;
252         unsigned char val;
253         unsigned long flags;
254         spin_lock_irqsave(&port_lock,flags);
255         reg = reg + socket * 0x40;
256         port = sockets[socket].io_base; 
257         outb(reg,port);
258         val = inb(port+1);
259         val |= mask;
260         outb(reg,port);
261         outb(val,port+1);
262         spin_unlock_irqrestore(&port_lock,flags);
263 }
264
265
266 static void indirect_resetbit(int socket, unsigned short reg, unsigned char mask)
267 {
268         unsigned short int port;
269         unsigned char val;
270         unsigned long flags;
271         spin_lock_irqsave(&port_lock,flags);
272         reg = reg + socket * 0x40;
273         port = sockets[socket].io_base; 
274         outb(reg,port);
275         val = inb(port+1);
276         val &= ~mask;
277         outb(reg,port);
278         outb(val,port+1);
279         spin_unlock_irqrestore(&port_lock,flags);
280 }
281
282 static void indirect_write16(int socket, unsigned short reg, unsigned short value)
283 {
284         unsigned short int port;
285         unsigned char val;
286         unsigned long flags;
287         spin_lock_irqsave(&port_lock,flags);
288         reg = reg + socket * 0x40;
289         port = sockets[socket].io_base; 
290         
291         outb(reg,port);
292         val = value & 255;
293         outb(val,port+1);
294         
295         reg++;
296         
297         outb(reg,port);
298         val = value>>8;
299         outb(val,port+1);
300         spin_unlock_irqrestore(&port_lock,flags);
301 }
302
303 /* simple helper functions */
304 /* External clock time, in nanoseconds.  120 ns = 8.33 MHz */
305 static int cycle_time = 120;
306
307 static int to_cycles(int ns)
308 {
309         if (cycle_time!=0)
310                 return ns/cycle_time;
311         else
312                 return 0;
313 }
314     
315
316 /* Interrupt handler functionality */
317
318 static irqreturn_t i82092aa_interrupt(int irq, void *dev)
319 {
320         int i;
321         int loopcount = 0;
322         int handled = 0;
323
324         unsigned int events, active=0;
325         
326 /*      enter("i82092aa_interrupt");*/
327         
328         while (1) {
329                 loopcount++;
330                 if (loopcount>20) {
331                         printk(KERN_ERR "i82092aa: infinite eventloop in interrupt \n");
332                         break;
333                 }
334                 
335                 active = 0;
336                 
337                 for (i=0;i<socket_count;i++) {
338                         int csc;
339                         if (sockets[i].card_state==0) /* Inactive socket, should not happen */
340                                 continue;
341                         
342                         csc = indirect_read(i,I365_CSC); /* card status change register */
343                         
344                         if (csc==0)  /* no events on this socket */
345                                 continue;
346                         handled = 1;
347                         events = 0;
348                          
349                         if (csc & I365_CSC_DETECT) {
350                                 events |= SS_DETECT;
351                                 printk("Card detected in socket %i!\n",i);
352                          }
353                         
354                         if (indirect_read(i,I365_INTCTL) & I365_PC_IOCARD) { 
355                                 /* For IO/CARDS, bit 0 means "read the card" */
356                                 events |= (csc & I365_CSC_STSCHG) ? SS_STSCHG : 0; 
357                         } else {
358                                 /* Check for battery/ready events */
359                                 events |= (csc & I365_CSC_BVD1) ? SS_BATDEAD : 0;
360                                 events |= (csc & I365_CSC_BVD2) ? SS_BATWARN : 0;
361                                 events |= (csc & I365_CSC_READY) ? SS_READY : 0;
362                         }
363                         
364                         if (events) {
365                                 pcmcia_parse_events(&sockets[i].socket, events);
366                         }
367                         active |= events;
368                 }
369                                 
370                 if (active==0) /* no more events to handle */
371                         break;                          
372                 
373         }
374         return IRQ_RETVAL(handled);
375 /*      leave("i82092aa_interrupt");*/
376 }
377
378
379
380 /* socket functions */
381
382 static int card_present(int socketno)
383 {       
384         unsigned int val;
385         enter("card_present");
386         
387         if ((socketno<0) || (socketno >= MAX_SOCKETS))
388                 return 0;
389         if (sockets[socketno].io_base == 0)
390                 return 0;
391
392                 
393         val = indirect_read(socketno, 1); /* Interface status register */
394         if ((val&12)==12) {
395                 leave("card_present 1");
396                 return 1;
397         }
398                 
399         leave("card_present 0");
400         return 0;
401 }
402
403 static void set_bridge_state(int sock)
404 {
405         enter("set_bridge_state");
406         indirect_write(sock, I365_GBLCTL,0x00);
407         indirect_write(sock, I365_GENCTL,0x00);
408         
409         indirect_setbit(sock, I365_INTCTL,0x08);
410         leave("set_bridge_state");
411 }
412
413
414
415
416
417       
418 static int i82092aa_init(struct pcmcia_socket *sock)
419 {
420         int i;
421         struct resource res = { .start = 0, .end = 0x0fff };
422         pccard_io_map io = { 0, 0, 0, 0, 1 };
423         pccard_mem_map mem = { .res = &res, };
424         
425         enter("i82092aa_init");
426                         
427         for (i = 0; i < 2; i++) {
428                 io.map = i;
429                 i82092aa_set_io_map(sock, &io);
430         }
431         for (i = 0; i < 5; i++) {
432                 mem.map = i;
433                 i82092aa_set_mem_map(sock, &mem);
434         }
435         
436         leave("i82092aa_init");
437         return 0;
438 }
439                                                                                                                                                                                                                                               
440 static int i82092aa_get_status(struct pcmcia_socket *socket, u_int *value)
441 {
442         unsigned int sock = container_of(socket, struct socket_info, socket)->number;
443         unsigned int status;
444         
445         enter("i82092aa_get_status");
446         
447         status = indirect_read(sock,I365_STATUS); /* Interface Status Register */
448         *value = 0;
449         
450         if ((status & I365_CS_DETECT) == I365_CS_DETECT) {
451                 *value |= SS_DETECT;
452         }
453                 
454         /* IO cards have a different meaning of bits 0,1 */
455         /* Also notice the inverse-logic on the bits */
456          if (indirect_read(sock, I365_INTCTL) & I365_PC_IOCARD) {
457                 /* IO card */
458                 if (!(status & I365_CS_STSCHG))
459                         *value |= SS_STSCHG;
460          } else { /* non I/O card */
461                 if (!(status & I365_CS_BVD1))
462                         *value |= SS_BATDEAD;
463                 if (!(status & I365_CS_BVD2))
464                         *value |= SS_BATWARN;
465                         
466          }
467          
468          if (status & I365_CS_WRPROT)
469                 (*value) |= SS_WRPROT;  /* card is write protected */
470          
471          if (status & I365_CS_READY)
472                 (*value) |= SS_READY;    /* card is not busy */
473                 
474          if (status & I365_CS_POWERON)
475                 (*value) |= SS_POWERON;  /* power is applied to the card */
476
477
478         leave("i82092aa_get_status");
479         return 0;
480 }
481
482
483 static int i82092aa_set_socket(struct pcmcia_socket *socket, socket_state_t *state) 
484 {
485         unsigned int sock = container_of(socket, struct socket_info, socket)->number;
486         unsigned char reg;
487         
488         enter("i82092aa_set_socket");
489         
490         /* First, set the global controller options */
491         
492         set_bridge_state(sock);
493         
494         /* Values for the IGENC register */
495         
496         reg = 0;
497         if (!(state->flags & SS_RESET))         /* The reset bit has "inverse" logic */
498                 reg = reg | I365_PC_RESET;  
499         if (state->flags & SS_IOCARD) 
500                 reg = reg | I365_PC_IOCARD;
501                 
502         indirect_write(sock,I365_INTCTL,reg); /* IGENC, Interrupt and General Control Register */
503         
504         /* Power registers */
505         
506         reg = I365_PWR_NORESET; /* default: disable resetdrv on resume */
507         
508         if (state->flags & SS_PWR_AUTO) {
509                 printk("Auto power\n");
510                 reg |= I365_PWR_AUTO;   /* automatic power mngmnt */
511         }
512         if (state->flags & SS_OUTPUT_ENA) {
513                 printk("Power Enabled \n");
514                 reg |= I365_PWR_OUT;    /* enable power */
515         }
516         
517         switch (state->Vcc) {
518                 case 0: 
519                         break;
520                 case 50: 
521                         printk("setting voltage to Vcc to 5V on socket %i\n",sock);
522                         reg |= I365_VCC_5V;
523                         break;
524                 default:
525                         printk("i82092aa: i82092aa_set_socket called with invalid VCC power value: %i ", state->Vcc);
526                         leave("i82092aa_set_socket");
527                         return -EINVAL;
528         }
529         
530         
531         switch (state->Vpp) {
532                 case 0: 
533                         printk("not setting Vpp on socket %i\n",sock);
534                         break;
535                 case 50: 
536                         printk("setting Vpp to 5.0 for socket %i\n",sock);
537                         reg |= I365_VPP1_5V | I365_VPP2_5V;
538                         break;
539                 case 120: 
540                         printk("setting Vpp to 12.0\n");
541                         reg |= I365_VPP1_12V | I365_VPP2_12V;
542                         break;
543                 default:
544                         printk("i82092aa: i82092aa_set_socket called with invalid VPP power value: %i ", state->Vcc);
545                         leave("i82092aa_set_socket");
546                         return -EINVAL;
547         }
548         
549         if (reg != indirect_read(sock,I365_POWER)) /* only write if changed */
550                 indirect_write(sock,I365_POWER,reg);
551                 
552         /* Enable specific interrupt events */
553         
554         reg = 0x00;
555         if (state->csc_mask & SS_DETECT) {
556                 reg |= I365_CSC_DETECT;
557         }
558         if (state->flags & SS_IOCARD) {
559                 if (state->csc_mask & SS_STSCHG)
560                         reg |= I365_CSC_STSCHG;
561         } else {
562                 if (state->csc_mask & SS_BATDEAD) 
563                         reg |= I365_CSC_BVD1;
564                 if (state->csc_mask & SS_BATWARN) 
565                         reg |= I365_CSC_BVD2;
566                 if (state->csc_mask & SS_READY) 
567                         reg |= I365_CSC_READY; 
568                                         
569         }
570         
571         /* now write the value and clear the (probably bogus) pending stuff by doing a dummy read*/
572         
573         indirect_write(sock,I365_CSCINT,reg);
574         (void)indirect_read(sock,I365_CSC);
575
576         leave("i82092aa_set_socket");
577         return 0;
578 }
579
580 static int i82092aa_set_io_map(struct pcmcia_socket *socket, struct pccard_io_map *io)
581 {
582         unsigned int sock = container_of(socket, struct socket_info, socket)->number;
583         unsigned char map, ioctl;
584         
585         enter("i82092aa_set_io_map");
586         
587         map = io->map;
588         
589         /* Check error conditions */    
590         if (map > 1) {
591                 leave("i82092aa_set_io_map with invalid map");
592                 return -EINVAL;
593         }
594         if ((io->start > 0xffff) || (io->stop > 0xffff) || (io->stop < io->start)){
595                 leave("i82092aa_set_io_map with invalid io");
596                 return -EINVAL;
597         }
598
599         /* Turn off the window before changing anything */ 
600         if (indirect_read(sock, I365_ADDRWIN) & I365_ENA_IO(map))
601                 indirect_resetbit(sock, I365_ADDRWIN, I365_ENA_IO(map));
602
603 /*      printk("set_io_map: Setting range to %x - %x \n",io->start,io->stop);  */
604         
605         /* write the new values */
606         indirect_write16(sock,I365_IO(map)+I365_W_START,io->start);             
607         indirect_write16(sock,I365_IO(map)+I365_W_STOP,io->stop);               
608                         
609         ioctl = indirect_read(sock,I365_IOCTL) & ~I365_IOCTL_MASK(map);
610         
611         if (io->flags & (MAP_16BIT|MAP_AUTOSZ))
612                 ioctl |= I365_IOCTL_16BIT(map);
613                 
614         indirect_write(sock,I365_IOCTL,ioctl);
615         
616         /* Turn the window back on if needed */
617         if (io->flags & MAP_ACTIVE)
618                 indirect_setbit(sock,I365_ADDRWIN,I365_ENA_IO(map));
619                         
620         leave("i82092aa_set_io_map");   
621         return 0;
622 }
623
624 static int i82092aa_set_mem_map(struct pcmcia_socket *socket, struct pccard_mem_map *mem)
625 {
626         struct socket_info *sock_info = container_of(socket, struct socket_info, socket);
627         unsigned int sock = sock_info->number;
628         struct pci_bus_region region;
629         unsigned short base, i;
630         unsigned char map;
631         
632         enter("i82092aa_set_mem_map");
633
634         pcibios_resource_to_bus(sock_info->dev, &region, mem->res);
635         
636         map = mem->map;
637         if (map > 4) {
638                 leave("i82092aa_set_mem_map: invalid map");
639                 return -EINVAL;
640         }
641         
642         
643         if ( (mem->card_start > 0x3ffffff) || (region.start > region.end) ||
644              (mem->speed > 1000) ) {
645                 leave("i82092aa_set_mem_map: invalid address / speed");
646                 printk("invalid mem map for socket %i : %lx to %lx with a start of %x \n",sock,region.start, region.end, mem->card_start);
647                 return -EINVAL;
648         }
649         
650         /* Turn off the window before changing anything */
651         if (indirect_read(sock, I365_ADDRWIN) & I365_ENA_MEM(map))
652                       indirect_resetbit(sock, I365_ADDRWIN, I365_ENA_MEM(map));
653                          
654                          
655 /*      printk("set_mem_map: Setting map %i range to %x - %x on socket %i, speed is %i, active = %i \n",map, region.start,region.end,sock,mem->speed,mem->flags & MAP_ACTIVE);  */
656
657         /* write the start address */
658         base = I365_MEM(map);
659         i = (region.start >> 12) & 0x0fff;
660         if (mem->flags & MAP_16BIT) 
661                 i |= I365_MEM_16BIT;
662         if (mem->flags & MAP_0WS)
663                 i |= I365_MEM_0WS;      
664         indirect_write16(sock,base+I365_W_START,i);
665                                
666         /* write the stop address */
667         
668         i= (region.end >> 12) & 0x0fff;
669         switch (to_cycles(mem->speed)) {
670                 case 0:
671                         break;
672                 case 1:
673                         i |= I365_MEM_WS0;
674                         break;
675                 case 2:
676                         i |= I365_MEM_WS1;
677                         break;
678                 default:
679                         i |= I365_MEM_WS1 | I365_MEM_WS0;
680                         break;
681         }
682         
683         indirect_write16(sock,base+I365_W_STOP,i);
684         
685         /* card start */
686         
687         i = ((mem->card_start - region.start) >> 12) & 0x3fff;
688         if (mem->flags & MAP_WRPROT)
689                 i |= I365_MEM_WRPROT;
690         if (mem->flags & MAP_ATTRIB) {
691 /*              printk("requesting attribute memory for socket %i\n",sock);*/
692                 i |= I365_MEM_REG;
693         } else {
694 /*              printk("requesting normal memory for socket %i\n",sock);*/
695         }
696         indirect_write16(sock,base+I365_W_OFF,i);
697         
698         /* Enable the window if necessary */
699         if (mem->flags & MAP_ACTIVE)
700                 indirect_setbit(sock, I365_ADDRWIN, I365_ENA_MEM(map));
701                     
702         leave("i82092aa_set_mem_map");
703         return 0;
704 }
705
706 static int i82092aa_module_init(void)
707 {
708         enter("i82092aa_module_init");
709         pci_register_driver(&i82092aa_pci_drv);
710         leave("i82092aa_module_init");
711         return 0;
712 }
713
714 static void i82092aa_module_exit(void)
715 {
716         enter("i82092aa_module_exit");
717         pci_unregister_driver(&i82092aa_pci_drv);
718         if (sockets[0].io_base>0)
719                          release_region(sockets[0].io_base, 2);
720         leave("i82092aa_module_exit");
721 }
722
723 module_init(i82092aa_module_init);
724 module_exit(i82092aa_module_exit);
725