[PATCH] pcmcia: remove get_socket callback
[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/config.h>
14 #include <linux/module.h>
15 #include <linux/pci.h>
16 #include <linux/init.h>
17 #include <linux/workqueue.h>
18 #include <linux/interrupt.h>
19 #include <linux/device.h>
20
21 #include <pcmcia/cs_types.h>
22 #include <pcmcia/ss.h>
23 #include <pcmcia/cs.h>
24
25 #include <asm/system.h>
26 #include <asm/io.h>
27
28 #include "i82092aa.h"
29 #include "i82365.h"
30
31 MODULE_LICENSE("GPL");
32
33 /* PCI core routines */
34 static struct pci_device_id i82092aa_pci_ids[] = {
35         {
36               .vendor = PCI_VENDOR_ID_INTEL,
37               .device = PCI_DEVICE_ID_INTEL_82092AA_0,
38               .subvendor = PCI_ANY_ID,
39               .subdevice = PCI_ANY_ID,
40          },
41          {} 
42 };
43 MODULE_DEVICE_TABLE(pci, i82092aa_pci_ids);
44
45 static int i82092aa_socket_suspend (struct pci_dev *dev, pm_message_t state)
46 {
47         return pcmcia_socket_dev_suspend(&dev->dev, state);
48 }
49
50 static int i82092aa_socket_resume (struct pci_dev *dev)
51 {
52         return pcmcia_socket_dev_resume(&dev->dev);
53 }
54
55 static struct pci_driver i82092aa_pci_drv = {
56         .name           = "i82092aa",
57         .id_table       = i82092aa_pci_ids,
58         .probe          = i82092aa_pci_probe,
59         .remove         = __devexit_p(i82092aa_pci_remove),
60         .suspend        = i82092aa_socket_suspend,
61         .resume         = i82092aa_socket_resume,
62 };
63
64
65 /* the pccard structure and its functions */
66 static struct pccard_operations i82092aa_operations = {
67         .init                   = i82092aa_init,
68         .get_status             = i82092aa_get_status,
69         .set_socket             = i82092aa_set_socket,
70         .set_io_map             = i82092aa_set_io_map,
71         .set_mem_map            = i82092aa_set_mem_map,
72 };
73
74 /* The card can do upto 4 sockets, allocate a structure for each of them */
75
76 struct socket_info {
77         int     number;
78         int     card_state;     /*  0 = no socket,
79                                     1 = empty socket, 
80                                     2 = card but not initialized,
81                                     3 = operational card */
82         kio_addr_t io_base;     /* base io address of the socket */
83         
84         struct pcmcia_socket socket;
85         struct pci_dev *dev;    /* The PCI device for the socket */
86 };
87
88 #define MAX_SOCKETS 4
89 static struct socket_info sockets[MAX_SOCKETS];
90 static int socket_count;  /* shortcut */                                                                                
91
92
93 static int __devinit i82092aa_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
94 {
95         unsigned char configbyte;
96         int i, ret;
97         
98         enter("i82092aa_pci_probe");
99         
100         if ((ret = pci_enable_device(dev)))
101                 return ret;
102                 
103         pci_read_config_byte(dev, 0x40, &configbyte);  /* PCI Configuration Control */
104         switch(configbyte&6) {
105                 case 0:
106                         socket_count = 2;
107                         break;
108                 case 2:
109                         socket_count = 1;
110                         break;
111                 case 4:
112                 case 6:
113                         socket_count = 4;
114                         break;
115                         
116                 default:
117                         printk(KERN_ERR "i82092aa: Oops, you did something we didn't think of.\n");
118                         ret = -EIO;
119                         goto err_out_disable;
120         }
121         printk(KERN_INFO "i82092aa: configured as a %d socket device.\n", socket_count);
122
123         if (!request_region(pci_resource_start(dev, 0), 2, "i82092aa")) {
124                 ret = -EBUSY;
125                 goto err_out_disable;
126         }
127         
128         for (i = 0;i<socket_count;i++) {
129                 sockets[i].card_state = 1; /* 1 = present but empty */
130                 sockets[i].io_base = pci_resource_start(dev, 0);
131                 sockets[i].socket.features |= SS_CAP_PCCARD;
132                 sockets[i].socket.map_size = 0x1000;
133                 sockets[i].socket.irq_mask = 0;
134                 sockets[i].socket.pci_irq  = dev->irq;
135                 sockets[i].socket.owner = THIS_MODULE;
136
137                 sockets[i].number = i;
138                 
139                 if (card_present(i)) {
140                         sockets[i].card_state = 3;
141                         dprintk(KERN_DEBUG "i82092aa: slot %i is occupied\n",i);
142                 } else {
143                         dprintk(KERN_DEBUG "i82092aa: slot %i is vacant\n",i);
144                 }
145         }
146                 
147         /* Now, specifiy that all interrupts are to be done as PCI interrupts */
148         configbyte = 0xFF; /* bitmask, one bit per event, 1 = PCI interrupt, 0 = ISA interrupt */
149         pci_write_config_byte(dev, 0x50, configbyte); /* PCI Interrupt Routing Register */
150
151         /* Register the interrupt handler */
152         dprintk(KERN_DEBUG "Requesting interrupt %i \n",dev->irq);
153         if ((ret = request_irq(dev->irq, i82092aa_interrupt, SA_SHIRQ, "i82092aa", i82092aa_interrupt))) {
154                 printk(KERN_ERR "i82092aa: Failed to register IRQ %d, aborting\n", dev->irq);
155                 goto err_out_free_res;
156         }
157
158         pci_set_drvdata(dev, &sockets[i].socket);
159
160         for (i = 0; i<socket_count; i++) {
161                 sockets[i].socket.dev.dev = &dev->dev;
162                 sockets[i].socket.ops = &i82092aa_operations;
163                 sockets[i].socket.resource_ops = &pccard_nonstatic_ops;
164                 ret = pcmcia_register_socket(&sockets[i].socket);
165                 if (ret) {
166                         goto err_out_free_sockets;
167                 }
168         }
169
170         leave("i82092aa_pci_probe");
171         return 0;
172
173 err_out_free_sockets:
174         if (i) {
175                 for (i--;i>=0;i--) {
176                         pcmcia_unregister_socket(&sockets[i].socket);
177                 }
178         }
179         free_irq(dev->irq, i82092aa_interrupt);
180 err_out_free_res:
181         release_region(pci_resource_start(dev, 0), 2);
182 err_out_disable:
183         pci_disable_device(dev);
184         return ret;                     
185 }
186
187 static void __devexit i82092aa_pci_remove(struct pci_dev *dev)
188 {
189         struct pcmcia_socket *socket = pci_get_drvdata(dev);
190
191         enter("i82092aa_pci_remove");
192         
193         free_irq(dev->irq, i82092aa_interrupt);
194
195         if (socket)
196                 pcmcia_unregister_socket(socket);
197
198         leave("i82092aa_pci_remove");
199 }
200
201 static DEFINE_SPINLOCK(port_lock);
202
203 /* basic value read/write functions */
204
205 static unsigned char indirect_read(int socket, unsigned short reg)
206 {
207         unsigned short int port;
208         unsigned char val;
209         unsigned long flags;
210         spin_lock_irqsave(&port_lock,flags);
211         reg += socket * 0x40;
212         port = sockets[socket].io_base;
213         outb(reg,port);
214         val = inb(port+1);
215         spin_unlock_irqrestore(&port_lock,flags);
216         return val;
217 }
218
219 #if 0
220 static unsigned short indirect_read16(int socket, unsigned short reg)
221 {
222         unsigned short int port;
223         unsigned short tmp;
224         unsigned long flags;
225         spin_lock_irqsave(&port_lock,flags);
226         reg  = reg + socket * 0x40;
227         port = sockets[socket].io_base;
228         outb(reg,port);
229         tmp = inb(port+1);
230         reg++;
231         outb(reg,port);
232         tmp = tmp | (inb(port+1)<<8);
233         spin_unlock_irqrestore(&port_lock,flags);
234         return tmp;
235 }
236 #endif
237
238 static void indirect_write(int socket, unsigned short reg, unsigned char value)
239 {
240         unsigned short int port;
241         unsigned long flags;
242         spin_lock_irqsave(&port_lock,flags);
243         reg = reg + socket * 0x40;
244         port = sockets[socket].io_base; 
245         outb(reg,port);
246         outb(value,port+1);
247         spin_unlock_irqrestore(&port_lock,flags);
248 }
249
250 static void indirect_setbit(int socket, unsigned short reg, unsigned char mask)
251 {
252         unsigned short int port;
253         unsigned char val;
254         unsigned long flags;
255         spin_lock_irqsave(&port_lock,flags);
256         reg = reg + socket * 0x40;
257         port = sockets[socket].io_base; 
258         outb(reg,port);
259         val = inb(port+1);
260         val |= mask;
261         outb(reg,port);
262         outb(val,port+1);
263         spin_unlock_irqrestore(&port_lock,flags);
264 }
265
266
267 static void indirect_resetbit(int socket, unsigned short reg, unsigned char mask)
268 {
269         unsigned short int port;
270         unsigned char val;
271         unsigned long flags;
272         spin_lock_irqsave(&port_lock,flags);
273         reg = reg + socket * 0x40;
274         port = sockets[socket].io_base; 
275         outb(reg,port);
276         val = inb(port+1);
277         val &= ~mask;
278         outb(reg,port);
279         outb(val,port+1);
280         spin_unlock_irqrestore(&port_lock,flags);
281 }
282
283 static void indirect_write16(int socket, unsigned short reg, unsigned short value)
284 {
285         unsigned short int port;
286         unsigned char val;
287         unsigned long flags;
288         spin_lock_irqsave(&port_lock,flags);
289         reg = reg + socket * 0x40;
290         port = sockets[socket].io_base; 
291         
292         outb(reg,port);
293         val = value & 255;
294         outb(val,port+1);
295         
296         reg++;
297         
298         outb(reg,port);
299         val = value>>8;
300         outb(val,port+1);
301         spin_unlock_irqrestore(&port_lock,flags);
302 }
303
304 /* simple helper functions */
305 /* External clock time, in nanoseconds.  120 ns = 8.33 MHz */
306 static int cycle_time = 120;
307
308 static int to_cycles(int ns)
309 {
310         if (cycle_time!=0)
311                 return ns/cycle_time;
312         else
313                 return 0;
314 }
315     
316
317 /* Interrupt handler functionality */
318
319 static irqreturn_t i82092aa_interrupt(int irq, void *dev, struct pt_regs *regs)
320 {
321         int i;
322         int loopcount = 0;
323         int handled = 0;
324
325         unsigned int events, active=0;
326         
327 /*      enter("i82092aa_interrupt");*/
328         
329         while (1) {
330                 loopcount++;
331                 if (loopcount>20) {
332                         printk(KERN_ERR "i82092aa: infinite eventloop in interrupt \n");
333                         break;
334                 }
335                 
336                 active = 0;
337                 
338                 for (i=0;i<socket_count;i++) {
339                         int csc;
340                         if (sockets[i].card_state==0) /* Inactive socket, should not happen */
341                                 continue;
342                         
343                         csc = indirect_read(i,I365_CSC); /* card status change register */
344                         
345                         if (csc==0)  /* no events on this socket */
346                                 continue;
347                         handled = 1;
348                         events = 0;
349                          
350                         if (csc & I365_CSC_DETECT) {
351                                 events |= SS_DETECT;
352                                 printk("Card detected in socket %i!\n",i);
353                          }
354                         
355                         if (indirect_read(i,I365_INTCTL) & I365_PC_IOCARD) { 
356                                 /* For IO/CARDS, bit 0 means "read the card" */
357                                 events |= (csc & I365_CSC_STSCHG) ? SS_STSCHG : 0; 
358                         } else {
359                                 /* Check for battery/ready events */
360                                 events |= (csc & I365_CSC_BVD1) ? SS_BATDEAD : 0;
361                                 events |= (csc & I365_CSC_BVD2) ? SS_BATWARN : 0;
362                                 events |= (csc & I365_CSC_READY) ? SS_READY : 0;
363                         }
364                         
365                         if (events) {
366                                 pcmcia_parse_events(&sockets[i].socket, events);
367                         }
368                         active |= events;
369                 }
370                                 
371                 if (active==0) /* no more events to handle */
372                         break;                          
373                 
374         }
375         return IRQ_RETVAL(handled);
376 /*      leave("i82092aa_interrupt");*/
377 }
378
379
380
381 /* socket functions */
382
383 static int card_present(int socketno)
384 {       
385         unsigned int val;
386         enter("card_present");
387         
388         if ((socketno<0) || (socketno >= MAX_SOCKETS))
389                 return 0;
390         if (sockets[socketno].io_base == 0)
391                 return 0;
392
393                 
394         val = indirect_read(socketno, 1); /* Interface status register */
395         if ((val&12)==12) {
396                 leave("card_present 1");
397                 return 1;
398         }
399                 
400         leave("card_present 0");
401         return 0;
402 }
403
404 static void set_bridge_state(int sock)
405 {
406         enter("set_bridge_state");
407         indirect_write(sock, I365_GBLCTL,0x00);
408         indirect_write(sock, I365_GENCTL,0x00);
409         
410         indirect_setbit(sock, I365_INTCTL,0x08);
411         leave("set_bridge_state");
412 }
413
414
415
416
417
418       
419 static int i82092aa_init(struct pcmcia_socket *sock)
420 {
421         int i;
422         struct resource res = { .start = 0, .end = 0x0fff };
423         pccard_io_map io = { 0, 0, 0, 0, 1 };
424         pccard_mem_map mem = { .res = &res, };
425         
426         enter("i82092aa_init");
427                         
428         for (i = 0; i < 2; i++) {
429                 io.map = i;
430                 i82092aa_set_io_map(sock, &io);
431         }
432         for (i = 0; i < 5; i++) {
433                 mem.map = i;
434                 i82092aa_set_mem_map(sock, &mem);
435         }
436         
437         leave("i82092aa_init");
438         return 0;
439 }
440                                                                                                                                                                                                                                               
441 static int i82092aa_get_status(struct pcmcia_socket *socket, u_int *value)
442 {
443         unsigned int sock = container_of(socket, struct socket_info, socket)->number;
444         unsigned int status;
445         
446         enter("i82092aa_get_status");
447         
448         status = indirect_read(sock,I365_STATUS); /* Interface Status Register */
449         *value = 0;
450         
451         if ((status & I365_CS_DETECT) == I365_CS_DETECT) {
452                 *value |= SS_DETECT;
453         }
454                 
455         /* IO cards have a different meaning of bits 0,1 */
456         /* Also notice the inverse-logic on the bits */
457          if (indirect_read(sock, I365_INTCTL) & I365_PC_IOCARD) {
458                 /* IO card */
459                 if (!(status & I365_CS_STSCHG))
460                         *value |= SS_STSCHG;
461          } else { /* non I/O card */
462                 if (!(status & I365_CS_BVD1))
463                         *value |= SS_BATDEAD;
464                 if (!(status & I365_CS_BVD2))
465                         *value |= SS_BATWARN;
466                         
467          }
468          
469          if (status & I365_CS_WRPROT)
470                 (*value) |= SS_WRPROT;  /* card is write protected */
471          
472          if (status & I365_CS_READY)
473                 (*value) |= SS_READY;    /* card is not busy */
474                 
475          if (status & I365_CS_POWERON)
476                 (*value) |= SS_POWERON;  /* power is applied to the card */
477
478
479         leave("i82092aa_get_status");
480         return 0;
481 }
482
483
484 static int i82092aa_set_socket(struct pcmcia_socket *socket, socket_state_t *state) 
485 {
486         unsigned int sock = container_of(socket, struct socket_info, socket)->number;
487         unsigned char reg;
488         
489         enter("i82092aa_set_socket");
490         
491         /* First, set the global controller options */
492         
493         set_bridge_state(sock);
494         
495         /* Values for the IGENC register */
496         
497         reg = 0;
498         if (!(state->flags & SS_RESET))         /* The reset bit has "inverse" logic */
499                 reg = reg | I365_PC_RESET;  
500         if (state->flags & SS_IOCARD) 
501                 reg = reg | I365_PC_IOCARD;
502                 
503         indirect_write(sock,I365_INTCTL,reg); /* IGENC, Interrupt and General Control Register */
504         
505         /* Power registers */
506         
507         reg = I365_PWR_NORESET; /* default: disable resetdrv on resume */
508         
509         if (state->flags & SS_PWR_AUTO) {
510                 printk("Auto power\n");
511                 reg |= I365_PWR_AUTO;   /* automatic power mngmnt */
512         }
513         if (state->flags & SS_OUTPUT_ENA) {
514                 printk("Power Enabled \n");
515                 reg |= I365_PWR_OUT;    /* enable power */
516         }
517         
518         switch (state->Vcc) {
519                 case 0: 
520                         break;
521                 case 50: 
522                         printk("setting voltage to Vcc to 5V on socket %i\n",sock);
523                         reg |= I365_VCC_5V;
524                         break;
525                 default:
526                         printk("i82092aa: i82092aa_set_socket called with invalid VCC power value: %i ", state->Vcc);
527                         leave("i82092aa_set_socket");
528                         return -EINVAL;
529         }
530         
531         
532         switch (state->Vpp) {
533                 case 0: 
534                         printk("not setting Vpp on socket %i\n",sock);
535                         break;
536                 case 50: 
537                         printk("setting Vpp to 5.0 for socket %i\n",sock);
538                         reg |= I365_VPP1_5V | I365_VPP2_5V;
539                         break;
540                 case 120: 
541                         printk("setting Vpp to 12.0\n");
542                         reg |= I365_VPP1_12V | I365_VPP2_12V;
543                         break;
544                 default:
545                         printk("i82092aa: i82092aa_set_socket called with invalid VPP power value: %i ", state->Vcc);
546                         leave("i82092aa_set_socket");
547                         return -EINVAL;
548         }
549         
550         if (reg != indirect_read(sock,I365_POWER)) /* only write if changed */
551                 indirect_write(sock,I365_POWER,reg);
552                 
553         /* Enable specific interrupt events */
554         
555         reg = 0x00;
556         if (state->csc_mask & SS_DETECT) {
557                 reg |= I365_CSC_DETECT;
558         }
559         if (state->flags & SS_IOCARD) {
560                 if (state->csc_mask & SS_STSCHG)
561                         reg |= I365_CSC_STSCHG;
562         } else {
563                 if (state->csc_mask & SS_BATDEAD) 
564                         reg |= I365_CSC_BVD1;
565                 if (state->csc_mask & SS_BATWARN) 
566                         reg |= I365_CSC_BVD2;
567                 if (state->csc_mask & SS_READY) 
568                         reg |= I365_CSC_READY; 
569                                         
570         }
571         
572         /* now write the value and clear the (probably bogus) pending stuff by doing a dummy read*/
573         
574         indirect_write(sock,I365_CSCINT,reg);
575         (void)indirect_read(sock,I365_CSC);
576
577         leave("i82092aa_set_socket");
578         return 0;
579 }
580
581 static int i82092aa_set_io_map(struct pcmcia_socket *socket, struct pccard_io_map *io)
582 {
583         unsigned int sock = container_of(socket, struct socket_info, socket)->number;
584         unsigned char map, ioctl;
585         
586         enter("i82092aa_set_io_map");
587         
588         map = io->map;
589         
590         /* Check error conditions */    
591         if (map > 1) {
592                 leave("i82092aa_set_io_map with invalid map");
593                 return -EINVAL;
594         }
595         if ((io->start > 0xffff) || (io->stop > 0xffff) || (io->stop < io->start)){
596                 leave("i82092aa_set_io_map with invalid io");
597                 return -EINVAL;
598         }
599
600         /* Turn off the window before changing anything */ 
601         if (indirect_read(sock, I365_ADDRWIN) & I365_ENA_IO(map))
602                 indirect_resetbit(sock, I365_ADDRWIN, I365_ENA_IO(map));
603
604 /*      printk("set_io_map: Setting range to %x - %x \n",io->start,io->stop);  */
605         
606         /* write the new values */
607         indirect_write16(sock,I365_IO(map)+I365_W_START,io->start);             
608         indirect_write16(sock,I365_IO(map)+I365_W_STOP,io->stop);               
609                         
610         ioctl = indirect_read(sock,I365_IOCTL) & ~I365_IOCTL_MASK(map);
611         
612         if (io->flags & (MAP_16BIT|MAP_AUTOSZ))
613                 ioctl |= I365_IOCTL_16BIT(map);
614                 
615         indirect_write(sock,I365_IOCTL,ioctl);
616         
617         /* Turn the window back on if needed */
618         if (io->flags & MAP_ACTIVE)
619                 indirect_setbit(sock,I365_ADDRWIN,I365_ENA_IO(map));
620                         
621         leave("i82092aa_set_io_map");   
622         return 0;
623 }
624
625 static int i82092aa_set_mem_map(struct pcmcia_socket *socket, struct pccard_mem_map *mem)
626 {
627         struct socket_info *sock_info = container_of(socket, struct socket_info, socket);
628         unsigned int sock = sock_info->number;
629         struct pci_bus_region region;
630         unsigned short base, i;
631         unsigned char map;
632         
633         enter("i82092aa_set_mem_map");
634
635         pcibios_resource_to_bus(sock_info->dev, &region, mem->res);
636         
637         map = mem->map;
638         if (map > 4) {
639                 leave("i82092aa_set_mem_map: invalid map");
640                 return -EINVAL;
641         }
642         
643         
644         if ( (mem->card_start > 0x3ffffff) || (region.start > region.end) ||
645              (mem->speed > 1000) ) {
646                 leave("i82092aa_set_mem_map: invalid address / speed");
647                 printk("invalid mem map for socket %i : %lx to %lx with a start of %x \n",sock,region.start, region.end, mem->card_start);
648                 return -EINVAL;
649         }
650         
651         /* Turn off the window before changing anything */
652         if (indirect_read(sock, I365_ADDRWIN) & I365_ENA_MEM(map))
653                       indirect_resetbit(sock, I365_ADDRWIN, I365_ENA_MEM(map));
654                          
655                          
656 /*      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);  */
657
658         /* write the start address */
659         base = I365_MEM(map);
660         i = (region.start >> 12) & 0x0fff;
661         if (mem->flags & MAP_16BIT) 
662                 i |= I365_MEM_16BIT;
663         if (mem->flags & MAP_0WS)
664                 i |= I365_MEM_0WS;      
665         indirect_write16(sock,base+I365_W_START,i);
666                                
667         /* write the stop address */
668         
669         i= (region.end >> 12) & 0x0fff;
670         switch (to_cycles(mem->speed)) {
671                 case 0:
672                         break;
673                 case 1:
674                         i |= I365_MEM_WS0;
675                         break;
676                 case 2:
677                         i |= I365_MEM_WS1;
678                         break;
679                 default:
680                         i |= I365_MEM_WS1 | I365_MEM_WS0;
681                         break;
682         }
683         
684         indirect_write16(sock,base+I365_W_STOP,i);
685         
686         /* card start */
687         
688         i = ((mem->card_start - region.start) >> 12) & 0x3fff;
689         if (mem->flags & MAP_WRPROT)
690                 i |= I365_MEM_WRPROT;
691         if (mem->flags & MAP_ATTRIB) {
692 /*              printk("requesting attribute memory for socket %i\n",sock);*/
693                 i |= I365_MEM_REG;
694         } else {
695 /*              printk("requesting normal memory for socket %i\n",sock);*/
696         }
697         indirect_write16(sock,base+I365_W_OFF,i);
698         
699         /* Enable the window if necessary */
700         if (mem->flags & MAP_ACTIVE)
701                 indirect_setbit(sock, I365_ADDRWIN, I365_ENA_MEM(map));
702                     
703         leave("i82092aa_set_mem_map");
704         return 0;
705 }
706
707 static int i82092aa_module_init(void)
708 {
709         enter("i82092aa_module_init");
710         pci_register_driver(&i82092aa_pci_drv);
711         leave("i82092aa_module_init");
712         return 0;
713 }
714
715 static void i82092aa_module_exit(void)
716 {
717         enter("i82092aa_module_exit");
718         pci_unregister_driver(&i82092aa_pci_drv);
719         if (sockets[0].io_base>0)
720                          release_region(sockets[0].io_base, 2);
721         leave("i82092aa_module_exit");
722 }
723
724 module_init(i82092aa_module_init);
725 module_exit(i82092aa_module_exit);
726