Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes...
[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
10 #include <linux/kernel.h>
11 #include <linux/module.h>
12 #include <linux/pci.h>
13 #include <linux/init.h>
14 #include <linux/workqueue.h>
15 #include <linux/interrupt.h>
16 #include <linux/device.h>
17
18 #include <pcmcia/cs_types.h>
19 #include <pcmcia/ss.h>
20 #include <pcmcia/cs.h>
21
22 #include <asm/system.h>
23 #include <asm/io.h>
24
25 #include "i82092aa.h"
26 #include "i82365.h"
27
28 MODULE_LICENSE("GPL");
29
30 /* PCI core routines */
31 static struct pci_device_id i82092aa_pci_ids[] = {
32         {
33               .vendor = PCI_VENDOR_ID_INTEL,
34               .device = PCI_DEVICE_ID_INTEL_82092AA_0,
35               .subvendor = PCI_ANY_ID,
36               .subdevice = PCI_ANY_ID,
37          },
38          {} 
39 };
40 MODULE_DEVICE_TABLE(pci, i82092aa_pci_ids);
41
42 static struct pci_driver i82092aa_pci_driver = {
43         .name           = "i82092aa",
44         .id_table       = i82092aa_pci_ids,
45         .probe          = i82092aa_pci_probe,
46         .remove         = __devexit_p(i82092aa_pci_remove),
47 };
48
49
50 /* the pccard structure and its functions */
51 static struct pccard_operations i82092aa_operations = {
52         .init                   = i82092aa_init,
53         .get_status             = i82092aa_get_status,
54         .set_socket             = i82092aa_set_socket,
55         .set_io_map             = i82092aa_set_io_map,
56         .set_mem_map            = i82092aa_set_mem_map,
57 };
58
59 /* The card can do upto 4 sockets, allocate a structure for each of them */
60
61 struct socket_info {
62         int     number;
63         int     card_state;     /*  0 = no socket,
64                                     1 = empty socket, 
65                                     2 = card but not initialized,
66                                     3 = operational card */
67         unsigned int io_base;   /* base io address of the socket */
68         
69         struct pcmcia_socket socket;
70         struct pci_dev *dev;    /* The PCI device for the socket */
71 };
72
73 #define MAX_SOCKETS 4
74 static struct socket_info sockets[MAX_SOCKETS];
75 static int socket_count;  /* shortcut */                                                                                
76
77
78 static int __devinit i82092aa_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
79 {
80         unsigned char configbyte;
81         int i, ret;
82         
83         enter("i82092aa_pci_probe");
84         
85         if ((ret = pci_enable_device(dev)))
86                 return ret;
87                 
88         pci_read_config_byte(dev, 0x40, &configbyte);  /* PCI Configuration Control */
89         switch(configbyte&6) {
90                 case 0:
91                         socket_count = 2;
92                         break;
93                 case 2:
94                         socket_count = 1;
95                         break;
96                 case 4:
97                 case 6:
98                         socket_count = 4;
99                         break;
100                         
101                 default:
102                         printk(KERN_ERR "i82092aa: Oops, you did something we didn't think of.\n");
103                         ret = -EIO;
104                         goto err_out_disable;
105         }
106         printk(KERN_INFO "i82092aa: configured as a %d socket device.\n", socket_count);
107
108         if (!request_region(pci_resource_start(dev, 0), 2, "i82092aa")) {
109                 ret = -EBUSY;
110                 goto err_out_disable;
111         }
112         
113         for (i = 0;i<socket_count;i++) {
114                 sockets[i].card_state = 1; /* 1 = present but empty */
115                 sockets[i].io_base = pci_resource_start(dev, 0);
116                 sockets[i].socket.features |= SS_CAP_PCCARD;
117                 sockets[i].socket.map_size = 0x1000;
118                 sockets[i].socket.irq_mask = 0;
119                 sockets[i].socket.pci_irq  = dev->irq;
120                 sockets[i].socket.cb_dev  = dev;
121                 sockets[i].socket.owner = THIS_MODULE;
122
123                 sockets[i].number = i;
124                 
125                 if (card_present(i)) {
126                         sockets[i].card_state = 3;
127                         dprintk(KERN_DEBUG "i82092aa: slot %i is occupied\n",i);
128                 } else {
129                         dprintk(KERN_DEBUG "i82092aa: slot %i is vacant\n",i);
130                 }
131         }
132                 
133         /* Now, specifiy that all interrupts are to be done as PCI interrupts */
134         configbyte = 0xFF; /* bitmask, one bit per event, 1 = PCI interrupt, 0 = ISA interrupt */
135         pci_write_config_byte(dev, 0x50, configbyte); /* PCI Interrupt Routing Register */
136
137         /* Register the interrupt handler */
138         dprintk(KERN_DEBUG "Requesting interrupt %i \n",dev->irq);
139         if ((ret = request_irq(dev->irq, i82092aa_interrupt, IRQF_SHARED, "i82092aa", i82092aa_interrupt))) {
140                 printk(KERN_ERR "i82092aa: Failed to register IRQ %d, aborting\n", dev->irq);
141                 goto err_out_free_res;
142         }
143
144         pci_set_drvdata(dev, &sockets[i].socket);
145
146         for (i = 0; i<socket_count; i++) {
147                 sockets[i].socket.dev.parent = &dev->dev;
148                 sockets[i].socket.ops = &i82092aa_operations;
149                 sockets[i].socket.resource_ops = &pccard_nonstatic_ops;
150                 ret = pcmcia_register_socket(&sockets[i].socket);
151                 if (ret) {
152                         goto err_out_free_sockets;
153                 }
154         }
155
156         leave("i82092aa_pci_probe");
157         return 0;
158
159 err_out_free_sockets:
160         if (i) {
161                 for (i--;i>=0;i--) {
162                         pcmcia_unregister_socket(&sockets[i].socket);
163                 }
164         }
165         free_irq(dev->irq, i82092aa_interrupt);
166 err_out_free_res:
167         release_region(pci_resource_start(dev, 0), 2);
168 err_out_disable:
169         pci_disable_device(dev);
170         return ret;                     
171 }
172
173 static void __devexit i82092aa_pci_remove(struct pci_dev *dev)
174 {
175         struct pcmcia_socket *socket = pci_get_drvdata(dev);
176
177         enter("i82092aa_pci_remove");
178         
179         free_irq(dev->irq, i82092aa_interrupt);
180
181         if (socket)
182                 pcmcia_unregister_socket(socket);
183
184         leave("i82092aa_pci_remove");
185 }
186
187 static DEFINE_SPINLOCK(port_lock);
188
189 /* basic value read/write functions */
190
191 static unsigned char indirect_read(int socket, unsigned short reg)
192 {
193         unsigned short int port;
194         unsigned char val;
195         unsigned long flags;
196         spin_lock_irqsave(&port_lock,flags);
197         reg += socket * 0x40;
198         port = sockets[socket].io_base;
199         outb(reg,port);
200         val = inb(port+1);
201         spin_unlock_irqrestore(&port_lock,flags);
202         return val;
203 }
204
205 #if 0
206 static unsigned short indirect_read16(int socket, unsigned short reg)
207 {
208         unsigned short int port;
209         unsigned short tmp;
210         unsigned long flags;
211         spin_lock_irqsave(&port_lock,flags);
212         reg  = reg + socket * 0x40;
213         port = sockets[socket].io_base;
214         outb(reg,port);
215         tmp = inb(port+1);
216         reg++;
217         outb(reg,port);
218         tmp = tmp | (inb(port+1)<<8);
219         spin_unlock_irqrestore(&port_lock,flags);
220         return tmp;
221 }
222 #endif
223
224 static void indirect_write(int socket, unsigned short reg, unsigned char value)
225 {
226         unsigned short int port;
227         unsigned long flags;
228         spin_lock_irqsave(&port_lock,flags);
229         reg = reg + socket * 0x40;
230         port = sockets[socket].io_base; 
231         outb(reg,port);
232         outb(value,port+1);
233         spin_unlock_irqrestore(&port_lock,flags);
234 }
235
236 static void indirect_setbit(int socket, unsigned short reg, unsigned char mask)
237 {
238         unsigned short int port;
239         unsigned char val;
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         val = inb(port+1);
246         val |= mask;
247         outb(reg,port);
248         outb(val,port+1);
249         spin_unlock_irqrestore(&port_lock,flags);
250 }
251
252
253 static void indirect_resetbit(int socket, unsigned short reg, unsigned char mask)
254 {
255         unsigned short int port;
256         unsigned char val;
257         unsigned long flags;
258         spin_lock_irqsave(&port_lock,flags);
259         reg = reg + socket * 0x40;
260         port = sockets[socket].io_base; 
261         outb(reg,port);
262         val = inb(port+1);
263         val &= ~mask;
264         outb(reg,port);
265         outb(val,port+1);
266         spin_unlock_irqrestore(&port_lock,flags);
267 }
268
269 static void indirect_write16(int socket, unsigned short reg, unsigned short value)
270 {
271         unsigned short int port;
272         unsigned char val;
273         unsigned long flags;
274         spin_lock_irqsave(&port_lock,flags);
275         reg = reg + socket * 0x40;
276         port = sockets[socket].io_base; 
277         
278         outb(reg,port);
279         val = value & 255;
280         outb(val,port+1);
281         
282         reg++;
283         
284         outb(reg,port);
285         val = value>>8;
286         outb(val,port+1);
287         spin_unlock_irqrestore(&port_lock,flags);
288 }
289
290 /* simple helper functions */
291 /* External clock time, in nanoseconds.  120 ns = 8.33 MHz */
292 static int cycle_time = 120;
293
294 static int to_cycles(int ns)
295 {
296         if (cycle_time!=0)
297                 return ns/cycle_time;
298         else
299                 return 0;
300 }
301     
302
303 /* Interrupt handler functionality */
304
305 static irqreturn_t i82092aa_interrupt(int irq, void *dev)
306 {
307         int i;
308         int loopcount = 0;
309         int handled = 0;
310
311         unsigned int events, active=0;
312         
313 /*      enter("i82092aa_interrupt");*/
314         
315         while (1) {
316                 loopcount++;
317                 if (loopcount>20) {
318                         printk(KERN_ERR "i82092aa: infinite eventloop in interrupt \n");
319                         break;
320                 }
321                 
322                 active = 0;
323                 
324                 for (i=0;i<socket_count;i++) {
325                         int csc;
326                         if (sockets[i].card_state==0) /* Inactive socket, should not happen */
327                                 continue;
328                         
329                         csc = indirect_read(i,I365_CSC); /* card status change register */
330                         
331                         if (csc==0)  /* no events on this socket */
332                                 continue;
333                         handled = 1;
334                         events = 0;
335                          
336                         if (csc & I365_CSC_DETECT) {
337                                 events |= SS_DETECT;
338                                 printk("Card detected in socket %i!\n",i);
339                          }
340                         
341                         if (indirect_read(i,I365_INTCTL) & I365_PC_IOCARD) { 
342                                 /* For IO/CARDS, bit 0 means "read the card" */
343                                 events |= (csc & I365_CSC_STSCHG) ? SS_STSCHG : 0; 
344                         } else {
345                                 /* Check for battery/ready events */
346                                 events |= (csc & I365_CSC_BVD1) ? SS_BATDEAD : 0;
347                                 events |= (csc & I365_CSC_BVD2) ? SS_BATWARN : 0;
348                                 events |= (csc & I365_CSC_READY) ? SS_READY : 0;
349                         }
350                         
351                         if (events) {
352                                 pcmcia_parse_events(&sockets[i].socket, events);
353                         }
354                         active |= events;
355                 }
356                                 
357                 if (active==0) /* no more events to handle */
358                         break;                          
359                 
360         }
361         return IRQ_RETVAL(handled);
362 /*      leave("i82092aa_interrupt");*/
363 }
364
365
366
367 /* socket functions */
368
369 static int card_present(int socketno)
370 {       
371         unsigned int val;
372         enter("card_present");
373         
374         if ((socketno<0) || (socketno >= MAX_SOCKETS))
375                 return 0;
376         if (sockets[socketno].io_base == 0)
377                 return 0;
378
379                 
380         val = indirect_read(socketno, 1); /* Interface status register */
381         if ((val&12)==12) {
382                 leave("card_present 1");
383                 return 1;
384         }
385                 
386         leave("card_present 0");
387         return 0;
388 }
389
390 static void set_bridge_state(int sock)
391 {
392         enter("set_bridge_state");
393         indirect_write(sock, I365_GBLCTL,0x00);
394         indirect_write(sock, I365_GENCTL,0x00);
395         
396         indirect_setbit(sock, I365_INTCTL,0x08);
397         leave("set_bridge_state");
398 }
399
400
401
402
403
404       
405 static int i82092aa_init(struct pcmcia_socket *sock)
406 {
407         int i;
408         struct resource res = { .start = 0, .end = 0x0fff };
409         pccard_io_map io = { 0, 0, 0, 0, 1 };
410         pccard_mem_map mem = { .res = &res, };
411         
412         enter("i82092aa_init");
413                         
414         for (i = 0; i < 2; i++) {
415                 io.map = i;
416                 i82092aa_set_io_map(sock, &io);
417         }
418         for (i = 0; i < 5; i++) {
419                 mem.map = i;
420                 i82092aa_set_mem_map(sock, &mem);
421         }
422         
423         leave("i82092aa_init");
424         return 0;
425 }
426                                                                                                                                                                                                                                               
427 static int i82092aa_get_status(struct pcmcia_socket *socket, u_int *value)
428 {
429         unsigned int sock = container_of(socket, struct socket_info, socket)->number;
430         unsigned int status;
431         
432         enter("i82092aa_get_status");
433         
434         status = indirect_read(sock,I365_STATUS); /* Interface Status Register */
435         *value = 0;
436         
437         if ((status & I365_CS_DETECT) == I365_CS_DETECT) {
438                 *value |= SS_DETECT;
439         }
440                 
441         /* IO cards have a different meaning of bits 0,1 */
442         /* Also notice the inverse-logic on the bits */
443          if (indirect_read(sock, I365_INTCTL) & I365_PC_IOCARD) {
444                 /* IO card */
445                 if (!(status & I365_CS_STSCHG))
446                         *value |= SS_STSCHG;
447          } else { /* non I/O card */
448                 if (!(status & I365_CS_BVD1))
449                         *value |= SS_BATDEAD;
450                 if (!(status & I365_CS_BVD2))
451                         *value |= SS_BATWARN;
452                         
453          }
454          
455          if (status & I365_CS_WRPROT)
456                 (*value) |= SS_WRPROT;  /* card is write protected */
457          
458          if (status & I365_CS_READY)
459                 (*value) |= SS_READY;    /* card is not busy */
460                 
461          if (status & I365_CS_POWERON)
462                 (*value) |= SS_POWERON;  /* power is applied to the card */
463
464
465         leave("i82092aa_get_status");
466         return 0;
467 }
468
469
470 static int i82092aa_set_socket(struct pcmcia_socket *socket, socket_state_t *state) 
471 {
472         unsigned int sock = container_of(socket, struct socket_info, socket)->number;
473         unsigned char reg;
474         
475         enter("i82092aa_set_socket");
476         
477         /* First, set the global controller options */
478         
479         set_bridge_state(sock);
480         
481         /* Values for the IGENC register */
482         
483         reg = 0;
484         if (!(state->flags & SS_RESET))         /* The reset bit has "inverse" logic */
485                 reg = reg | I365_PC_RESET;  
486         if (state->flags & SS_IOCARD) 
487                 reg = reg | I365_PC_IOCARD;
488                 
489         indirect_write(sock,I365_INTCTL,reg); /* IGENC, Interrupt and General Control Register */
490         
491         /* Power registers */
492         
493         reg = I365_PWR_NORESET; /* default: disable resetdrv on resume */
494         
495         if (state->flags & SS_PWR_AUTO) {
496                 printk("Auto power\n");
497                 reg |= I365_PWR_AUTO;   /* automatic power mngmnt */
498         }
499         if (state->flags & SS_OUTPUT_ENA) {
500                 printk("Power Enabled \n");
501                 reg |= I365_PWR_OUT;    /* enable power */
502         }
503         
504         switch (state->Vcc) {
505                 case 0: 
506                         break;
507                 case 50: 
508                         printk("setting voltage to Vcc to 5V on socket %i\n",sock);
509                         reg |= I365_VCC_5V;
510                         break;
511                 default:
512                         printk("i82092aa: i82092aa_set_socket called with invalid VCC power value: %i ", state->Vcc);
513                         leave("i82092aa_set_socket");
514                         return -EINVAL;
515         }
516         
517         
518         switch (state->Vpp) {
519                 case 0: 
520                         printk("not setting Vpp on socket %i\n",sock);
521                         break;
522                 case 50: 
523                         printk("setting Vpp to 5.0 for socket %i\n",sock);
524                         reg |= I365_VPP1_5V | I365_VPP2_5V;
525                         break;
526                 case 120: 
527                         printk("setting Vpp to 12.0\n");
528                         reg |= I365_VPP1_12V | I365_VPP2_12V;
529                         break;
530                 default:
531                         printk("i82092aa: i82092aa_set_socket called with invalid VPP power value: %i ", state->Vcc);
532                         leave("i82092aa_set_socket");
533                         return -EINVAL;
534         }
535         
536         if (reg != indirect_read(sock,I365_POWER)) /* only write if changed */
537                 indirect_write(sock,I365_POWER,reg);
538                 
539         /* Enable specific interrupt events */
540         
541         reg = 0x00;
542         if (state->csc_mask & SS_DETECT) {
543                 reg |= I365_CSC_DETECT;
544         }
545         if (state->flags & SS_IOCARD) {
546                 if (state->csc_mask & SS_STSCHG)
547                         reg |= I365_CSC_STSCHG;
548         } else {
549                 if (state->csc_mask & SS_BATDEAD) 
550                         reg |= I365_CSC_BVD1;
551                 if (state->csc_mask & SS_BATWARN) 
552                         reg |= I365_CSC_BVD2;
553                 if (state->csc_mask & SS_READY) 
554                         reg |= I365_CSC_READY; 
555                                         
556         }
557         
558         /* now write the value and clear the (probably bogus) pending stuff by doing a dummy read*/
559         
560         indirect_write(sock,I365_CSCINT,reg);
561         (void)indirect_read(sock,I365_CSC);
562
563         leave("i82092aa_set_socket");
564         return 0;
565 }
566
567 static int i82092aa_set_io_map(struct pcmcia_socket *socket, struct pccard_io_map *io)
568 {
569         unsigned int sock = container_of(socket, struct socket_info, socket)->number;
570         unsigned char map, ioctl;
571         
572         enter("i82092aa_set_io_map");
573         
574         map = io->map;
575         
576         /* Check error conditions */    
577         if (map > 1) {
578                 leave("i82092aa_set_io_map with invalid map");
579                 return -EINVAL;
580         }
581         if ((io->start > 0xffff) || (io->stop > 0xffff) || (io->stop < io->start)){
582                 leave("i82092aa_set_io_map with invalid io");
583                 return -EINVAL;
584         }
585
586         /* Turn off the window before changing anything */ 
587         if (indirect_read(sock, I365_ADDRWIN) & I365_ENA_IO(map))
588                 indirect_resetbit(sock, I365_ADDRWIN, I365_ENA_IO(map));
589
590 /*      printk("set_io_map: Setting range to %x - %x \n",io->start,io->stop);  */
591         
592         /* write the new values */
593         indirect_write16(sock,I365_IO(map)+I365_W_START,io->start);             
594         indirect_write16(sock,I365_IO(map)+I365_W_STOP,io->stop);               
595                         
596         ioctl = indirect_read(sock,I365_IOCTL) & ~I365_IOCTL_MASK(map);
597         
598         if (io->flags & (MAP_16BIT|MAP_AUTOSZ))
599                 ioctl |= I365_IOCTL_16BIT(map);
600                 
601         indirect_write(sock,I365_IOCTL,ioctl);
602         
603         /* Turn the window back on if needed */
604         if (io->flags & MAP_ACTIVE)
605                 indirect_setbit(sock,I365_ADDRWIN,I365_ENA_IO(map));
606                         
607         leave("i82092aa_set_io_map");   
608         return 0;
609 }
610
611 static int i82092aa_set_mem_map(struct pcmcia_socket *socket, struct pccard_mem_map *mem)
612 {
613         struct socket_info *sock_info = container_of(socket, struct socket_info, socket);
614         unsigned int sock = sock_info->number;
615         struct pci_bus_region region;
616         unsigned short base, i;
617         unsigned char map;
618         
619         enter("i82092aa_set_mem_map");
620
621         pcibios_resource_to_bus(sock_info->dev, &region, mem->res);
622         
623         map = mem->map;
624         if (map > 4) {
625                 leave("i82092aa_set_mem_map: invalid map");
626                 return -EINVAL;
627         }
628         
629         
630         if ( (mem->card_start > 0x3ffffff) || (region.start > region.end) ||
631              (mem->speed > 1000) ) {
632                 leave("i82092aa_set_mem_map: invalid address / speed");
633                 printk("invalid mem map for socket %i: %llx to %llx with a "
634                         "start of %x\n",
635                         sock,
636                         (unsigned long long)region.start,
637                         (unsigned long long)region.end,
638                         mem->card_start);
639                 return -EINVAL;
640         }
641         
642         /* Turn off the window before changing anything */
643         if (indirect_read(sock, I365_ADDRWIN) & I365_ENA_MEM(map))
644                       indirect_resetbit(sock, I365_ADDRWIN, I365_ENA_MEM(map));
645                          
646                          
647 /*      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);  */
648
649         /* write the start address */
650         base = I365_MEM(map);
651         i = (region.start >> 12) & 0x0fff;
652         if (mem->flags & MAP_16BIT) 
653                 i |= I365_MEM_16BIT;
654         if (mem->flags & MAP_0WS)
655                 i |= I365_MEM_0WS;      
656         indirect_write16(sock,base+I365_W_START,i);
657                                
658         /* write the stop address */
659         
660         i= (region.end >> 12) & 0x0fff;
661         switch (to_cycles(mem->speed)) {
662                 case 0:
663                         break;
664                 case 1:
665                         i |= I365_MEM_WS0;
666                         break;
667                 case 2:
668                         i |= I365_MEM_WS1;
669                         break;
670                 default:
671                         i |= I365_MEM_WS1 | I365_MEM_WS0;
672                         break;
673         }
674         
675         indirect_write16(sock,base+I365_W_STOP,i);
676         
677         /* card start */
678         
679         i = ((mem->card_start - region.start) >> 12) & 0x3fff;
680         if (mem->flags & MAP_WRPROT)
681                 i |= I365_MEM_WRPROT;
682         if (mem->flags & MAP_ATTRIB) {
683 /*              printk("requesting attribute memory for socket %i\n",sock);*/
684                 i |= I365_MEM_REG;
685         } else {
686 /*              printk("requesting normal memory for socket %i\n",sock);*/
687         }
688         indirect_write16(sock,base+I365_W_OFF,i);
689         
690         /* Enable the window if necessary */
691         if (mem->flags & MAP_ACTIVE)
692                 indirect_setbit(sock, I365_ADDRWIN, I365_ENA_MEM(map));
693                     
694         leave("i82092aa_set_mem_map");
695         return 0;
696 }
697
698 static int i82092aa_module_init(void)
699 {
700         return pci_register_driver(&i82092aa_pci_driver);
701 }
702
703 static void i82092aa_module_exit(void)
704 {
705         enter("i82092aa_module_exit");
706         pci_unregister_driver(&i82092aa_pci_driver);
707         if (sockets[0].io_base>0)
708                          release_region(sockets[0].io_base, 2);
709         leave("i82092aa_module_exit");
710 }
711
712 module_init(i82092aa_module_init);
713 module_exit(i82092aa_module_exit);
714