]> git.kernelconcepts.de Git - karo-tx-linux.git/blob - drivers/pcmcia/i82092.c
Merge tag 'mmc-merge-for-3.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git...
[karo-tx-linux.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/ss.h>
19
20 #include <asm/io.h>
21
22 #include "i82092aa.h"
23 #include "i82365.h"
24
25 MODULE_LICENSE("GPL");
26
27 /* PCI core routines */
28 static struct pci_device_id i82092aa_pci_ids[] = {
29         {
30               .vendor = PCI_VENDOR_ID_INTEL,
31               .device = PCI_DEVICE_ID_INTEL_82092AA_0,
32               .subvendor = PCI_ANY_ID,
33               .subdevice = PCI_ANY_ID,
34          },
35          {} 
36 };
37 MODULE_DEVICE_TABLE(pci, i82092aa_pci_ids);
38
39 static struct pci_driver i82092aa_pci_driver = {
40         .name           = "i82092aa",
41         .id_table       = i82092aa_pci_ids,
42         .probe          = i82092aa_pci_probe,
43         .remove         = __devexit_p(i82092aa_pci_remove),
44 };
45
46
47 /* the pccard structure and its functions */
48 static struct pccard_operations i82092aa_operations = {
49         .init                   = i82092aa_init,
50         .get_status             = i82092aa_get_status,
51         .set_socket             = i82092aa_set_socket,
52         .set_io_map             = i82092aa_set_io_map,
53         .set_mem_map            = i82092aa_set_mem_map,
54 };
55
56 /* The card can do up to 4 sockets, allocate a structure for each of them */
57
58 struct socket_info {
59         int     number;
60         int     card_state;     /*  0 = no socket,
61                                     1 = empty socket, 
62                                     2 = card but not initialized,
63                                     3 = operational card */
64         unsigned int io_base;   /* base io address of the socket */
65         
66         struct pcmcia_socket socket;
67         struct pci_dev *dev;    /* The PCI device for the socket */
68 };
69
70 #define MAX_SOCKETS 4
71 static struct socket_info sockets[MAX_SOCKETS];
72 static int socket_count;  /* shortcut */                                                                                
73
74
75 static int __devinit i82092aa_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
76 {
77         unsigned char configbyte;
78         int i, ret;
79         
80         enter("i82092aa_pci_probe");
81         
82         if ((ret = pci_enable_device(dev)))
83                 return ret;
84                 
85         pci_read_config_byte(dev, 0x40, &configbyte);  /* PCI Configuration Control */
86         switch(configbyte&6) {
87                 case 0:
88                         socket_count = 2;
89                         break;
90                 case 2:
91                         socket_count = 1;
92                         break;
93                 case 4:
94                 case 6:
95                         socket_count = 4;
96                         break;
97                         
98                 default:
99                         printk(KERN_ERR "i82092aa: Oops, you did something we didn't think of.\n");
100                         ret = -EIO;
101                         goto err_out_disable;
102         }
103         printk(KERN_INFO "i82092aa: configured as a %d socket device.\n", socket_count);
104
105         if (!request_region(pci_resource_start(dev, 0), 2, "i82092aa")) {
106                 ret = -EBUSY;
107                 goto err_out_disable;
108         }
109         
110         for (i = 0;i<socket_count;i++) {
111                 sockets[i].card_state = 1; /* 1 = present but empty */
112                 sockets[i].io_base = pci_resource_start(dev, 0);
113                 sockets[i].socket.features |= SS_CAP_PCCARD;
114                 sockets[i].socket.map_size = 0x1000;
115                 sockets[i].socket.irq_mask = 0;
116                 sockets[i].socket.pci_irq  = dev->irq;
117                 sockets[i].socket.cb_dev  = dev;
118                 sockets[i].socket.owner = THIS_MODULE;
119
120                 sockets[i].number = i;
121                 
122                 if (card_present(i)) {
123                         sockets[i].card_state = 3;
124                         dprintk(KERN_DEBUG "i82092aa: slot %i is occupied\n",i);
125                 } else {
126                         dprintk(KERN_DEBUG "i82092aa: slot %i is vacant\n",i);
127                 }
128         }
129                 
130         /* Now, specifiy that all interrupts are to be done as PCI interrupts */
131         configbyte = 0xFF; /* bitmask, one bit per event, 1 = PCI interrupt, 0 = ISA interrupt */
132         pci_write_config_byte(dev, 0x50, configbyte); /* PCI Interrupt Routing Register */
133
134         /* Register the interrupt handler */
135         dprintk(KERN_DEBUG "Requesting interrupt %i \n",dev->irq);
136         if ((ret = request_irq(dev->irq, i82092aa_interrupt, IRQF_SHARED, "i82092aa", i82092aa_interrupt))) {
137                 printk(KERN_ERR "i82092aa: Failed to register IRQ %d, aborting\n", dev->irq);
138                 goto err_out_free_res;
139         }
140
141         pci_set_drvdata(dev, &sockets[i].socket);
142
143         for (i = 0; i<socket_count; i++) {
144                 sockets[i].socket.dev.parent = &dev->dev;
145                 sockets[i].socket.ops = &i82092aa_operations;
146                 sockets[i].socket.resource_ops = &pccard_nonstatic_ops;
147                 ret = pcmcia_register_socket(&sockets[i].socket);
148                 if (ret) {
149                         goto err_out_free_sockets;
150                 }
151         }
152
153         leave("i82092aa_pci_probe");
154         return 0;
155
156 err_out_free_sockets:
157         if (i) {
158                 for (i--;i>=0;i--) {
159                         pcmcia_unregister_socket(&sockets[i].socket);
160                 }
161         }
162         free_irq(dev->irq, i82092aa_interrupt);
163 err_out_free_res:
164         release_region(pci_resource_start(dev, 0), 2);
165 err_out_disable:
166         pci_disable_device(dev);
167         return ret;                     
168 }
169
170 static void __devexit i82092aa_pci_remove(struct pci_dev *dev)
171 {
172         struct pcmcia_socket *socket = pci_get_drvdata(dev);
173
174         enter("i82092aa_pci_remove");
175         
176         free_irq(dev->irq, i82092aa_interrupt);
177
178         if (socket)
179                 pcmcia_unregister_socket(socket);
180
181         leave("i82092aa_pci_remove");
182 }
183
184 static DEFINE_SPINLOCK(port_lock);
185
186 /* basic value read/write functions */
187
188 static unsigned char indirect_read(int socket, unsigned short reg)
189 {
190         unsigned short int port;
191         unsigned char val;
192         unsigned long flags;
193         spin_lock_irqsave(&port_lock,flags);
194         reg += socket * 0x40;
195         port = sockets[socket].io_base;
196         outb(reg,port);
197         val = inb(port+1);
198         spin_unlock_irqrestore(&port_lock,flags);
199         return val;
200 }
201
202 #if 0
203 static unsigned short indirect_read16(int socket, unsigned short reg)
204 {
205         unsigned short int port;
206         unsigned short tmp;
207         unsigned long flags;
208         spin_lock_irqsave(&port_lock,flags);
209         reg  = reg + socket * 0x40;
210         port = sockets[socket].io_base;
211         outb(reg,port);
212         tmp = inb(port+1);
213         reg++;
214         outb(reg,port);
215         tmp = tmp | (inb(port+1)<<8);
216         spin_unlock_irqrestore(&port_lock,flags);
217         return tmp;
218 }
219 #endif
220
221 static void indirect_write(int socket, unsigned short reg, unsigned char value)
222 {
223         unsigned short int port;
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         outb(value,port+1);
230         spin_unlock_irqrestore(&port_lock,flags);
231 }
232
233 static void indirect_setbit(int socket, unsigned short reg, unsigned char mask)
234 {
235         unsigned short int port;
236         unsigned char val;
237         unsigned long flags;
238         spin_lock_irqsave(&port_lock,flags);
239         reg = reg + socket * 0x40;
240         port = sockets[socket].io_base; 
241         outb(reg,port);
242         val = inb(port+1);
243         val |= mask;
244         outb(reg,port);
245         outb(val,port+1);
246         spin_unlock_irqrestore(&port_lock,flags);
247 }
248
249
250 static void indirect_resetbit(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 static void indirect_write16(int socket, unsigned short reg, unsigned short value)
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         
275         outb(reg,port);
276         val = value & 255;
277         outb(val,port+1);
278         
279         reg++;
280         
281         outb(reg,port);
282         val = value>>8;
283         outb(val,port+1);
284         spin_unlock_irqrestore(&port_lock,flags);
285 }
286
287 /* simple helper functions */
288 /* External clock time, in nanoseconds.  120 ns = 8.33 MHz */
289 static int cycle_time = 120;
290
291 static int to_cycles(int ns)
292 {
293         if (cycle_time!=0)
294                 return ns/cycle_time;
295         else
296                 return 0;
297 }
298     
299
300 /* Interrupt handler functionality */
301
302 static irqreturn_t i82092aa_interrupt(int irq, void *dev)
303 {
304         int i;
305         int loopcount = 0;
306         int handled = 0;
307
308         unsigned int events, active=0;
309         
310 /*      enter("i82092aa_interrupt");*/
311         
312         while (1) {
313                 loopcount++;
314                 if (loopcount>20) {
315                         printk(KERN_ERR "i82092aa: infinite eventloop in interrupt \n");
316                         break;
317                 }
318                 
319                 active = 0;
320                 
321                 for (i=0;i<socket_count;i++) {
322                         int csc;
323                         if (sockets[i].card_state==0) /* Inactive socket, should not happen */
324                                 continue;
325                         
326                         csc = indirect_read(i,I365_CSC); /* card status change register */
327                         
328                         if (csc==0)  /* no events on this socket */
329                                 continue;
330                         handled = 1;
331                         events = 0;
332                          
333                         if (csc & I365_CSC_DETECT) {
334                                 events |= SS_DETECT;
335                                 printk("Card detected in socket %i!\n",i);
336                          }
337                         
338                         if (indirect_read(i,I365_INTCTL) & I365_PC_IOCARD) { 
339                                 /* For IO/CARDS, bit 0 means "read the card" */
340                                 events |= (csc & I365_CSC_STSCHG) ? SS_STSCHG : 0; 
341                         } else {
342                                 /* Check for battery/ready events */
343                                 events |= (csc & I365_CSC_BVD1) ? SS_BATDEAD : 0;
344                                 events |= (csc & I365_CSC_BVD2) ? SS_BATWARN : 0;
345                                 events |= (csc & I365_CSC_READY) ? SS_READY : 0;
346                         }
347                         
348                         if (events) {
349                                 pcmcia_parse_events(&sockets[i].socket, events);
350                         }
351                         active |= events;
352                 }
353                                 
354                 if (active==0) /* no more events to handle */
355                         break;                          
356                 
357         }
358         return IRQ_RETVAL(handled);
359 /*      leave("i82092aa_interrupt");*/
360 }
361
362
363
364 /* socket functions */
365
366 static int card_present(int socketno)
367 {       
368         unsigned int val;
369         enter("card_present");
370         
371         if ((socketno<0) || (socketno >= MAX_SOCKETS))
372                 return 0;
373         if (sockets[socketno].io_base == 0)
374                 return 0;
375
376                 
377         val = indirect_read(socketno, 1); /* Interface status register */
378         if ((val&12)==12) {
379                 leave("card_present 1");
380                 return 1;
381         }
382                 
383         leave("card_present 0");
384         return 0;
385 }
386
387 static void set_bridge_state(int sock)
388 {
389         enter("set_bridge_state");
390         indirect_write(sock, I365_GBLCTL,0x00);
391         indirect_write(sock, I365_GENCTL,0x00);
392         
393         indirect_setbit(sock, I365_INTCTL,0x08);
394         leave("set_bridge_state");
395 }
396
397
398
399
400
401       
402 static int i82092aa_init(struct pcmcia_socket *sock)
403 {
404         int i;
405         struct resource res = { .start = 0, .end = 0x0fff };
406         pccard_io_map io = { 0, 0, 0, 0, 1 };
407         pccard_mem_map mem = { .res = &res, };
408         
409         enter("i82092aa_init");
410                         
411         for (i = 0; i < 2; i++) {
412                 io.map = i;
413                 i82092aa_set_io_map(sock, &io);
414         }
415         for (i = 0; i < 5; i++) {
416                 mem.map = i;
417                 i82092aa_set_mem_map(sock, &mem);
418         }
419         
420         leave("i82092aa_init");
421         return 0;
422 }
423                                                                                                                                                                                                                                               
424 static int i82092aa_get_status(struct pcmcia_socket *socket, u_int *value)
425 {
426         unsigned int sock = container_of(socket, struct socket_info, socket)->number;
427         unsigned int status;
428         
429         enter("i82092aa_get_status");
430         
431         status = indirect_read(sock,I365_STATUS); /* Interface Status Register */
432         *value = 0;
433         
434         if ((status & I365_CS_DETECT) == I365_CS_DETECT) {
435                 *value |= SS_DETECT;
436         }
437                 
438         /* IO cards have a different meaning of bits 0,1 */
439         /* Also notice the inverse-logic on the bits */
440          if (indirect_read(sock, I365_INTCTL) & I365_PC_IOCARD) {
441                 /* IO card */
442                 if (!(status & I365_CS_STSCHG))
443                         *value |= SS_STSCHG;
444          } else { /* non I/O card */
445                 if (!(status & I365_CS_BVD1))
446                         *value |= SS_BATDEAD;
447                 if (!(status & I365_CS_BVD2))
448                         *value |= SS_BATWARN;
449                         
450          }
451          
452          if (status & I365_CS_WRPROT)
453                 (*value) |= SS_WRPROT;  /* card is write protected */
454          
455          if (status & I365_CS_READY)
456                 (*value) |= SS_READY;    /* card is not busy */
457                 
458          if (status & I365_CS_POWERON)
459                 (*value) |= SS_POWERON;  /* power is applied to the card */
460
461
462         leave("i82092aa_get_status");
463         return 0;
464 }
465
466
467 static int i82092aa_set_socket(struct pcmcia_socket *socket, socket_state_t *state) 
468 {
469         unsigned int sock = container_of(socket, struct socket_info, socket)->number;
470         unsigned char reg;
471         
472         enter("i82092aa_set_socket");
473         
474         /* First, set the global controller options */
475         
476         set_bridge_state(sock);
477         
478         /* Values for the IGENC register */
479         
480         reg = 0;
481         if (!(state->flags & SS_RESET))         /* The reset bit has "inverse" logic */
482                 reg = reg | I365_PC_RESET;  
483         if (state->flags & SS_IOCARD) 
484                 reg = reg | I365_PC_IOCARD;
485                 
486         indirect_write(sock,I365_INTCTL,reg); /* IGENC, Interrupt and General Control Register */
487         
488         /* Power registers */
489         
490         reg = I365_PWR_NORESET; /* default: disable resetdrv on resume */
491         
492         if (state->flags & SS_PWR_AUTO) {
493                 printk("Auto power\n");
494                 reg |= I365_PWR_AUTO;   /* automatic power mngmnt */
495         }
496         if (state->flags & SS_OUTPUT_ENA) {
497                 printk("Power Enabled \n");
498                 reg |= I365_PWR_OUT;    /* enable power */
499         }
500         
501         switch (state->Vcc) {
502                 case 0: 
503                         break;
504                 case 50: 
505                         printk("setting voltage to Vcc to 5V on socket %i\n",sock);
506                         reg |= I365_VCC_5V;
507                         break;
508                 default:
509                         printk("i82092aa: i82092aa_set_socket called with invalid VCC power value: %i ", state->Vcc);
510                         leave("i82092aa_set_socket");
511                         return -EINVAL;
512         }
513         
514         
515         switch (state->Vpp) {
516                 case 0: 
517                         printk("not setting Vpp on socket %i\n",sock);
518                         break;
519                 case 50: 
520                         printk("setting Vpp to 5.0 for socket %i\n",sock);
521                         reg |= I365_VPP1_5V | I365_VPP2_5V;
522                         break;
523                 case 120: 
524                         printk("setting Vpp to 12.0\n");
525                         reg |= I365_VPP1_12V | I365_VPP2_12V;
526                         break;
527                 default:
528                         printk("i82092aa: i82092aa_set_socket called with invalid VPP power value: %i ", state->Vcc);
529                         leave("i82092aa_set_socket");
530                         return -EINVAL;
531         }
532         
533         if (reg != indirect_read(sock,I365_POWER)) /* only write if changed */
534                 indirect_write(sock,I365_POWER,reg);
535                 
536         /* Enable specific interrupt events */
537         
538         reg = 0x00;
539         if (state->csc_mask & SS_DETECT) {
540                 reg |= I365_CSC_DETECT;
541         }
542         if (state->flags & SS_IOCARD) {
543                 if (state->csc_mask & SS_STSCHG)
544                         reg |= I365_CSC_STSCHG;
545         } else {
546                 if (state->csc_mask & SS_BATDEAD) 
547                         reg |= I365_CSC_BVD1;
548                 if (state->csc_mask & SS_BATWARN) 
549                         reg |= I365_CSC_BVD2;
550                 if (state->csc_mask & SS_READY) 
551                         reg |= I365_CSC_READY; 
552                                         
553         }
554         
555         /* now write the value and clear the (probably bogus) pending stuff by doing a dummy read*/
556         
557         indirect_write(sock,I365_CSCINT,reg);
558         (void)indirect_read(sock,I365_CSC);
559
560         leave("i82092aa_set_socket");
561         return 0;
562 }
563
564 static int i82092aa_set_io_map(struct pcmcia_socket *socket, struct pccard_io_map *io)
565 {
566         unsigned int sock = container_of(socket, struct socket_info, socket)->number;
567         unsigned char map, ioctl;
568         
569         enter("i82092aa_set_io_map");
570         
571         map = io->map;
572         
573         /* Check error conditions */    
574         if (map > 1) {
575                 leave("i82092aa_set_io_map with invalid map");
576                 return -EINVAL;
577         }
578         if ((io->start > 0xffff) || (io->stop > 0xffff) || (io->stop < io->start)){
579                 leave("i82092aa_set_io_map with invalid io");
580                 return -EINVAL;
581         }
582
583         /* Turn off the window before changing anything */ 
584         if (indirect_read(sock, I365_ADDRWIN) & I365_ENA_IO(map))
585                 indirect_resetbit(sock, I365_ADDRWIN, I365_ENA_IO(map));
586
587 /*      printk("set_io_map: Setting range to %x - %x \n",io->start,io->stop);  */
588         
589         /* write the new values */
590         indirect_write16(sock,I365_IO(map)+I365_W_START,io->start);             
591         indirect_write16(sock,I365_IO(map)+I365_W_STOP,io->stop);               
592                         
593         ioctl = indirect_read(sock,I365_IOCTL) & ~I365_IOCTL_MASK(map);
594         
595         if (io->flags & (MAP_16BIT|MAP_AUTOSZ))
596                 ioctl |= I365_IOCTL_16BIT(map);
597                 
598         indirect_write(sock,I365_IOCTL,ioctl);
599         
600         /* Turn the window back on if needed */
601         if (io->flags & MAP_ACTIVE)
602                 indirect_setbit(sock,I365_ADDRWIN,I365_ENA_IO(map));
603                         
604         leave("i82092aa_set_io_map");   
605         return 0;
606 }
607
608 static int i82092aa_set_mem_map(struct pcmcia_socket *socket, struct pccard_mem_map *mem)
609 {
610         struct socket_info *sock_info = container_of(socket, struct socket_info, socket);
611         unsigned int sock = sock_info->number;
612         struct pci_bus_region region;
613         unsigned short base, i;
614         unsigned char map;
615         
616         enter("i82092aa_set_mem_map");
617
618         pcibios_resource_to_bus(sock_info->dev, &region, mem->res);
619         
620         map = mem->map;
621         if (map > 4) {
622                 leave("i82092aa_set_mem_map: invalid map");
623                 return -EINVAL;
624         }
625         
626         
627         if ( (mem->card_start > 0x3ffffff) || (region.start > region.end) ||
628              (mem->speed > 1000) ) {
629                 leave("i82092aa_set_mem_map: invalid address / speed");
630                 printk("invalid mem map for socket %i: %llx to %llx with a "
631                         "start of %x\n",
632                         sock,
633                         (unsigned long long)region.start,
634                         (unsigned long long)region.end,
635                         mem->card_start);
636                 return -EINVAL;
637         }
638         
639         /* Turn off the window before changing anything */
640         if (indirect_read(sock, I365_ADDRWIN) & I365_ENA_MEM(map))
641                       indirect_resetbit(sock, I365_ADDRWIN, I365_ENA_MEM(map));
642                          
643                          
644 /*      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);  */
645
646         /* write the start address */
647         base = I365_MEM(map);
648         i = (region.start >> 12) & 0x0fff;
649         if (mem->flags & MAP_16BIT) 
650                 i |= I365_MEM_16BIT;
651         if (mem->flags & MAP_0WS)
652                 i |= I365_MEM_0WS;      
653         indirect_write16(sock,base+I365_W_START,i);
654                                
655         /* write the stop address */
656         
657         i= (region.end >> 12) & 0x0fff;
658         switch (to_cycles(mem->speed)) {
659                 case 0:
660                         break;
661                 case 1:
662                         i |= I365_MEM_WS0;
663                         break;
664                 case 2:
665                         i |= I365_MEM_WS1;
666                         break;
667                 default:
668                         i |= I365_MEM_WS1 | I365_MEM_WS0;
669                         break;
670         }
671         
672         indirect_write16(sock,base+I365_W_STOP,i);
673         
674         /* card start */
675         
676         i = ((mem->card_start - region.start) >> 12) & 0x3fff;
677         if (mem->flags & MAP_WRPROT)
678                 i |= I365_MEM_WRPROT;
679         if (mem->flags & MAP_ATTRIB) {
680 /*              printk("requesting attribute memory for socket %i\n",sock);*/
681                 i |= I365_MEM_REG;
682         } else {
683 /*              printk("requesting normal memory for socket %i\n",sock);*/
684         }
685         indirect_write16(sock,base+I365_W_OFF,i);
686         
687         /* Enable the window if necessary */
688         if (mem->flags & MAP_ACTIVE)
689                 indirect_setbit(sock, I365_ADDRWIN, I365_ENA_MEM(map));
690                     
691         leave("i82092aa_set_mem_map");
692         return 0;
693 }
694
695 static int i82092aa_module_init(void)
696 {
697         return pci_register_driver(&i82092aa_pci_driver);
698 }
699
700 static void i82092aa_module_exit(void)
701 {
702         enter("i82092aa_module_exit");
703         pci_unregister_driver(&i82092aa_pci_driver);
704         if (sockets[0].io_base>0)
705                          release_region(sockets[0].io_base, 2);
706         leave("i82092aa_module_exit");
707 }
708
709 module_init(i82092aa_module_init);
710 module_exit(i82092aa_module_exit);
711