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[GitHub/mt8127/android_kernel_alcatel_ttab.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 DEFINE_PCI_DEVICE_TABLE(i82092aa_pci_ids) = {
29 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82092AA_0) },
30 { }
31 };
32 MODULE_DEVICE_TABLE(pci, i82092aa_pci_ids);
33
34 static struct pci_driver i82092aa_pci_driver = {
35 .name = "i82092aa",
36 .id_table = i82092aa_pci_ids,
37 .probe = i82092aa_pci_probe,
38 .remove = i82092aa_pci_remove,
39 };
40
41
42 /* the pccard structure and its functions */
43 static struct pccard_operations i82092aa_operations = {
44 .init = i82092aa_init,
45 .get_status = i82092aa_get_status,
46 .set_socket = i82092aa_set_socket,
47 .set_io_map = i82092aa_set_io_map,
48 .set_mem_map = i82092aa_set_mem_map,
49 };
50
51 /* The card can do up to 4 sockets, allocate a structure for each of them */
52
53 struct socket_info {
54 int number;
55 int card_state; /* 0 = no socket,
56 1 = empty socket,
57 2 = card but not initialized,
58 3 = operational card */
59 unsigned int io_base; /* base io address of the socket */
60
61 struct pcmcia_socket socket;
62 struct pci_dev *dev; /* The PCI device for the socket */
63 };
64
65 #define MAX_SOCKETS 4
66 static struct socket_info sockets[MAX_SOCKETS];
67 static int socket_count; /* shortcut */
68
69
70 static int i82092aa_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
71 {
72 unsigned char configbyte;
73 int i, ret;
74
75 enter("i82092aa_pci_probe");
76
77 if ((ret = pci_enable_device(dev)))
78 return ret;
79
80 pci_read_config_byte(dev, 0x40, &configbyte); /* PCI Configuration Control */
81 switch(configbyte&6) {
82 case 0:
83 socket_count = 2;
84 break;
85 case 2:
86 socket_count = 1;
87 break;
88 case 4:
89 case 6:
90 socket_count = 4;
91 break;
92
93 default:
94 printk(KERN_ERR "i82092aa: Oops, you did something we didn't think of.\n");
95 ret = -EIO;
96 goto err_out_disable;
97 }
98 printk(KERN_INFO "i82092aa: configured as a %d socket device.\n", socket_count);
99
100 if (!request_region(pci_resource_start(dev, 0), 2, "i82092aa")) {
101 ret = -EBUSY;
102 goto err_out_disable;
103 }
104
105 for (i = 0;i<socket_count;i++) {
106 sockets[i].card_state = 1; /* 1 = present but empty */
107 sockets[i].io_base = pci_resource_start(dev, 0);
108 sockets[i].socket.features |= SS_CAP_PCCARD;
109 sockets[i].socket.map_size = 0x1000;
110 sockets[i].socket.irq_mask = 0;
111 sockets[i].socket.pci_irq = dev->irq;
112 sockets[i].socket.cb_dev = dev;
113 sockets[i].socket.owner = THIS_MODULE;
114
115 sockets[i].number = i;
116
117 if (card_present(i)) {
118 sockets[i].card_state = 3;
119 dprintk(KERN_DEBUG "i82092aa: slot %i is occupied\n",i);
120 } else {
121 dprintk(KERN_DEBUG "i82092aa: slot %i is vacant\n",i);
122 }
123 }
124
125 /* Now, specifiy that all interrupts are to be done as PCI interrupts */
126 configbyte = 0xFF; /* bitmask, one bit per event, 1 = PCI interrupt, 0 = ISA interrupt */
127 pci_write_config_byte(dev, 0x50, configbyte); /* PCI Interrupt Routing Register */
128
129 /* Register the interrupt handler */
130 dprintk(KERN_DEBUG "Requesting interrupt %i \n",dev->irq);
131 if ((ret = request_irq(dev->irq, i82092aa_interrupt, IRQF_SHARED, "i82092aa", i82092aa_interrupt))) {
132 printk(KERN_ERR "i82092aa: Failed to register IRQ %d, aborting\n", dev->irq);
133 goto err_out_free_res;
134 }
135
136 pci_set_drvdata(dev, &sockets[i].socket);
137
138 for (i = 0; i<socket_count; i++) {
139 sockets[i].socket.dev.parent = &dev->dev;
140 sockets[i].socket.ops = &i82092aa_operations;
141 sockets[i].socket.resource_ops = &pccard_nonstatic_ops;
142 ret = pcmcia_register_socket(&sockets[i].socket);
143 if (ret) {
144 goto err_out_free_sockets;
145 }
146 }
147
148 leave("i82092aa_pci_probe");
149 return 0;
150
151 err_out_free_sockets:
152 if (i) {
153 for (i--;i>=0;i--) {
154 pcmcia_unregister_socket(&sockets[i].socket);
155 }
156 }
157 free_irq(dev->irq, i82092aa_interrupt);
158 err_out_free_res:
159 release_region(pci_resource_start(dev, 0), 2);
160 err_out_disable:
161 pci_disable_device(dev);
162 return ret;
163 }
164
165 static void __devexit i82092aa_pci_remove(struct pci_dev *dev)
166 {
167 struct pcmcia_socket *socket = pci_get_drvdata(dev);
168
169 enter("i82092aa_pci_remove");
170
171 free_irq(dev->irq, i82092aa_interrupt);
172
173 if (socket)
174 pcmcia_unregister_socket(socket);
175
176 leave("i82092aa_pci_remove");
177 }
178
179 static DEFINE_SPINLOCK(port_lock);
180
181 /* basic value read/write functions */
182
183 static unsigned char indirect_read(int socket, unsigned short reg)
184 {
185 unsigned short int port;
186 unsigned char val;
187 unsigned long flags;
188 spin_lock_irqsave(&port_lock,flags);
189 reg += socket * 0x40;
190 port = sockets[socket].io_base;
191 outb(reg,port);
192 val = inb(port+1);
193 spin_unlock_irqrestore(&port_lock,flags);
194 return val;
195 }
196
197 #if 0
198 static unsigned short indirect_read16(int socket, unsigned short reg)
199 {
200 unsigned short int port;
201 unsigned short tmp;
202 unsigned long flags;
203 spin_lock_irqsave(&port_lock,flags);
204 reg = reg + socket * 0x40;
205 port = sockets[socket].io_base;
206 outb(reg,port);
207 tmp = inb(port+1);
208 reg++;
209 outb(reg,port);
210 tmp = tmp | (inb(port+1)<<8);
211 spin_unlock_irqrestore(&port_lock,flags);
212 return tmp;
213 }
214 #endif
215
216 static void indirect_write(int socket, unsigned short reg, unsigned char value)
217 {
218 unsigned short int port;
219 unsigned long flags;
220 spin_lock_irqsave(&port_lock,flags);
221 reg = reg + socket * 0x40;
222 port = sockets[socket].io_base;
223 outb(reg,port);
224 outb(value,port+1);
225 spin_unlock_irqrestore(&port_lock,flags);
226 }
227
228 static void indirect_setbit(int socket, unsigned short reg, unsigned char mask)
229 {
230 unsigned short int port;
231 unsigned char val;
232 unsigned long flags;
233 spin_lock_irqsave(&port_lock,flags);
234 reg = reg + socket * 0x40;
235 port = sockets[socket].io_base;
236 outb(reg,port);
237 val = inb(port+1);
238 val |= mask;
239 outb(reg,port);
240 outb(val,port+1);
241 spin_unlock_irqrestore(&port_lock,flags);
242 }
243
244
245 static void indirect_resetbit(int socket, unsigned short reg, unsigned char mask)
246 {
247 unsigned short int port;
248 unsigned char val;
249 unsigned long flags;
250 spin_lock_irqsave(&port_lock,flags);
251 reg = reg + socket * 0x40;
252 port = sockets[socket].io_base;
253 outb(reg,port);
254 val = inb(port+1);
255 val &= ~mask;
256 outb(reg,port);
257 outb(val,port+1);
258 spin_unlock_irqrestore(&port_lock,flags);
259 }
260
261 static void indirect_write16(int socket, unsigned short reg, unsigned short value)
262 {
263 unsigned short int port;
264 unsigned char val;
265 unsigned long flags;
266 spin_lock_irqsave(&port_lock,flags);
267 reg = reg + socket * 0x40;
268 port = sockets[socket].io_base;
269
270 outb(reg,port);
271 val = value & 255;
272 outb(val,port+1);
273
274 reg++;
275
276 outb(reg,port);
277 val = value>>8;
278 outb(val,port+1);
279 spin_unlock_irqrestore(&port_lock,flags);
280 }
281
282 /* simple helper functions */
283 /* External clock time, in nanoseconds. 120 ns = 8.33 MHz */
284 static int cycle_time = 120;
285
286 static int to_cycles(int ns)
287 {
288 if (cycle_time!=0)
289 return ns/cycle_time;
290 else
291 return 0;
292 }
293
294
295 /* Interrupt handler functionality */
296
297 static irqreturn_t i82092aa_interrupt(int irq, void *dev)
298 {
299 int i;
300 int loopcount = 0;
301 int handled = 0;
302
303 unsigned int events, active=0;
304
305 /* enter("i82092aa_interrupt");*/
306
307 while (1) {
308 loopcount++;
309 if (loopcount>20) {
310 printk(KERN_ERR "i82092aa: infinite eventloop in interrupt \n");
311 break;
312 }
313
314 active = 0;
315
316 for (i=0;i<socket_count;i++) {
317 int csc;
318 if (sockets[i].card_state==0) /* Inactive socket, should not happen */
319 continue;
320
321 csc = indirect_read(i,I365_CSC); /* card status change register */
322
323 if (csc==0) /* no events on this socket */
324 continue;
325 handled = 1;
326 events = 0;
327
328 if (csc & I365_CSC_DETECT) {
329 events |= SS_DETECT;
330 printk("Card detected in socket %i!\n",i);
331 }
332
333 if (indirect_read(i,I365_INTCTL) & I365_PC_IOCARD) {
334 /* For IO/CARDS, bit 0 means "read the card" */
335 events |= (csc & I365_CSC_STSCHG) ? SS_STSCHG : 0;
336 } else {
337 /* Check for battery/ready events */
338 events |= (csc & I365_CSC_BVD1) ? SS_BATDEAD : 0;
339 events |= (csc & I365_CSC_BVD2) ? SS_BATWARN : 0;
340 events |= (csc & I365_CSC_READY) ? SS_READY : 0;
341 }
342
343 if (events) {
344 pcmcia_parse_events(&sockets[i].socket, events);
345 }
346 active |= events;
347 }
348
349 if (active==0) /* no more events to handle */
350 break;
351
352 }
353 return IRQ_RETVAL(handled);
354 /* leave("i82092aa_interrupt");*/
355 }
356
357
358
359 /* socket functions */
360
361 static int card_present(int socketno)
362 {
363 unsigned int val;
364 enter("card_present");
365
366 if ((socketno<0) || (socketno >= MAX_SOCKETS))
367 return 0;
368 if (sockets[socketno].io_base == 0)
369 return 0;
370
371
372 val = indirect_read(socketno, 1); /* Interface status register */
373 if ((val&12)==12) {
374 leave("card_present 1");
375 return 1;
376 }
377
378 leave("card_present 0");
379 return 0;
380 }
381
382 static void set_bridge_state(int sock)
383 {
384 enter("set_bridge_state");
385 indirect_write(sock, I365_GBLCTL,0x00);
386 indirect_write(sock, I365_GENCTL,0x00);
387
388 indirect_setbit(sock, I365_INTCTL,0x08);
389 leave("set_bridge_state");
390 }
391
392
393
394
395
396
397 static int i82092aa_init(struct pcmcia_socket *sock)
398 {
399 int i;
400 struct resource res = { .start = 0, .end = 0x0fff };
401 pccard_io_map io = { 0, 0, 0, 0, 1 };
402 pccard_mem_map mem = { .res = &res, };
403
404 enter("i82092aa_init");
405
406 for (i = 0; i < 2; i++) {
407 io.map = i;
408 i82092aa_set_io_map(sock, &io);
409 }
410 for (i = 0; i < 5; i++) {
411 mem.map = i;
412 i82092aa_set_mem_map(sock, &mem);
413 }
414
415 leave("i82092aa_init");
416 return 0;
417 }
418
419 static int i82092aa_get_status(struct pcmcia_socket *socket, u_int *value)
420 {
421 unsigned int sock = container_of(socket, struct socket_info, socket)->number;
422 unsigned int status;
423
424 enter("i82092aa_get_status");
425
426 status = indirect_read(sock,I365_STATUS); /* Interface Status Register */
427 *value = 0;
428
429 if ((status & I365_CS_DETECT) == I365_CS_DETECT) {
430 *value |= SS_DETECT;
431 }
432
433 /* IO cards have a different meaning of bits 0,1 */
434 /* Also notice the inverse-logic on the bits */
435 if (indirect_read(sock, I365_INTCTL) & I365_PC_IOCARD) {
436 /* IO card */
437 if (!(status & I365_CS_STSCHG))
438 *value |= SS_STSCHG;
439 } else { /* non I/O card */
440 if (!(status & I365_CS_BVD1))
441 *value |= SS_BATDEAD;
442 if (!(status & I365_CS_BVD2))
443 *value |= SS_BATWARN;
444
445 }
446
447 if (status & I365_CS_WRPROT)
448 (*value) |= SS_WRPROT; /* card is write protected */
449
450 if (status & I365_CS_READY)
451 (*value) |= SS_READY; /* card is not busy */
452
453 if (status & I365_CS_POWERON)
454 (*value) |= SS_POWERON; /* power is applied to the card */
455
456
457 leave("i82092aa_get_status");
458 return 0;
459 }
460
461
462 static int i82092aa_set_socket(struct pcmcia_socket *socket, socket_state_t *state)
463 {
464 unsigned int sock = container_of(socket, struct socket_info, socket)->number;
465 unsigned char reg;
466
467 enter("i82092aa_set_socket");
468
469 /* First, set the global controller options */
470
471 set_bridge_state(sock);
472
473 /* Values for the IGENC register */
474
475 reg = 0;
476 if (!(state->flags & SS_RESET)) /* The reset bit has "inverse" logic */
477 reg = reg | I365_PC_RESET;
478 if (state->flags & SS_IOCARD)
479 reg = reg | I365_PC_IOCARD;
480
481 indirect_write(sock,I365_INTCTL,reg); /* IGENC, Interrupt and General Control Register */
482
483 /* Power registers */
484
485 reg = I365_PWR_NORESET; /* default: disable resetdrv on resume */
486
487 if (state->flags & SS_PWR_AUTO) {
488 printk("Auto power\n");
489 reg |= I365_PWR_AUTO; /* automatic power mngmnt */
490 }
491 if (state->flags & SS_OUTPUT_ENA) {
492 printk("Power Enabled \n");
493 reg |= I365_PWR_OUT; /* enable power */
494 }
495
496 switch (state->Vcc) {
497 case 0:
498 break;
499 case 50:
500 printk("setting voltage to Vcc to 5V on socket %i\n",sock);
501 reg |= I365_VCC_5V;
502 break;
503 default:
504 printk("i82092aa: i82092aa_set_socket called with invalid VCC power value: %i ", state->Vcc);
505 leave("i82092aa_set_socket");
506 return -EINVAL;
507 }
508
509
510 switch (state->Vpp) {
511 case 0:
512 printk("not setting Vpp on socket %i\n",sock);
513 break;
514 case 50:
515 printk("setting Vpp to 5.0 for socket %i\n",sock);
516 reg |= I365_VPP1_5V | I365_VPP2_5V;
517 break;
518 case 120:
519 printk("setting Vpp to 12.0\n");
520 reg |= I365_VPP1_12V | I365_VPP2_12V;
521 break;
522 default:
523 printk("i82092aa: i82092aa_set_socket called with invalid VPP power value: %i ", state->Vcc);
524 leave("i82092aa_set_socket");
525 return -EINVAL;
526 }
527
528 if (reg != indirect_read(sock,I365_POWER)) /* only write if changed */
529 indirect_write(sock,I365_POWER,reg);
530
531 /* Enable specific interrupt events */
532
533 reg = 0x00;
534 if (state->csc_mask & SS_DETECT) {
535 reg |= I365_CSC_DETECT;
536 }
537 if (state->flags & SS_IOCARD) {
538 if (state->csc_mask & SS_STSCHG)
539 reg |= I365_CSC_STSCHG;
540 } else {
541 if (state->csc_mask & SS_BATDEAD)
542 reg |= I365_CSC_BVD1;
543 if (state->csc_mask & SS_BATWARN)
544 reg |= I365_CSC_BVD2;
545 if (state->csc_mask & SS_READY)
546 reg |= I365_CSC_READY;
547
548 }
549
550 /* now write the value and clear the (probably bogus) pending stuff by doing a dummy read*/
551
552 indirect_write(sock,I365_CSCINT,reg);
553 (void)indirect_read(sock,I365_CSC);
554
555 leave("i82092aa_set_socket");
556 return 0;
557 }
558
559 static int i82092aa_set_io_map(struct pcmcia_socket *socket, struct pccard_io_map *io)
560 {
561 unsigned int sock = container_of(socket, struct socket_info, socket)->number;
562 unsigned char map, ioctl;
563
564 enter("i82092aa_set_io_map");
565
566 map = io->map;
567
568 /* Check error conditions */
569 if (map > 1) {
570 leave("i82092aa_set_io_map with invalid map");
571 return -EINVAL;
572 }
573 if ((io->start > 0xffff) || (io->stop > 0xffff) || (io->stop < io->start)){
574 leave("i82092aa_set_io_map with invalid io");
575 return -EINVAL;
576 }
577
578 /* Turn off the window before changing anything */
579 if (indirect_read(sock, I365_ADDRWIN) & I365_ENA_IO(map))
580 indirect_resetbit(sock, I365_ADDRWIN, I365_ENA_IO(map));
581
582 /* printk("set_io_map: Setting range to %x - %x \n",io->start,io->stop); */
583
584 /* write the new values */
585 indirect_write16(sock,I365_IO(map)+I365_W_START,io->start);
586 indirect_write16(sock,I365_IO(map)+I365_W_STOP,io->stop);
587
588 ioctl = indirect_read(sock,I365_IOCTL) & ~I365_IOCTL_MASK(map);
589
590 if (io->flags & (MAP_16BIT|MAP_AUTOSZ))
591 ioctl |= I365_IOCTL_16BIT(map);
592
593 indirect_write(sock,I365_IOCTL,ioctl);
594
595 /* Turn the window back on if needed */
596 if (io->flags & MAP_ACTIVE)
597 indirect_setbit(sock,I365_ADDRWIN,I365_ENA_IO(map));
598
599 leave("i82092aa_set_io_map");
600 return 0;
601 }
602
603 static int i82092aa_set_mem_map(struct pcmcia_socket *socket, struct pccard_mem_map *mem)
604 {
605 struct socket_info *sock_info = container_of(socket, struct socket_info, socket);
606 unsigned int sock = sock_info->number;
607 struct pci_bus_region region;
608 unsigned short base, i;
609 unsigned char map;
610
611 enter("i82092aa_set_mem_map");
612
613 pcibios_resource_to_bus(sock_info->dev, &region, mem->res);
614
615 map = mem->map;
616 if (map > 4) {
617 leave("i82092aa_set_mem_map: invalid map");
618 return -EINVAL;
619 }
620
621
622 if ( (mem->card_start > 0x3ffffff) || (region.start > region.end) ||
623 (mem->speed > 1000) ) {
624 leave("i82092aa_set_mem_map: invalid address / speed");
625 printk("invalid mem map for socket %i: %llx to %llx with a "
626 "start of %x\n",
627 sock,
628 (unsigned long long)region.start,
629 (unsigned long long)region.end,
630 mem->card_start);
631 return -EINVAL;
632 }
633
634 /* Turn off the window before changing anything */
635 if (indirect_read(sock, I365_ADDRWIN) & I365_ENA_MEM(map))
636 indirect_resetbit(sock, I365_ADDRWIN, I365_ENA_MEM(map));
637
638
639 /* 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); */
640
641 /* write the start address */
642 base = I365_MEM(map);
643 i = (region.start >> 12) & 0x0fff;
644 if (mem->flags & MAP_16BIT)
645 i |= I365_MEM_16BIT;
646 if (mem->flags & MAP_0WS)
647 i |= I365_MEM_0WS;
648 indirect_write16(sock,base+I365_W_START,i);
649
650 /* write the stop address */
651
652 i= (region.end >> 12) & 0x0fff;
653 switch (to_cycles(mem->speed)) {
654 case 0:
655 break;
656 case 1:
657 i |= I365_MEM_WS0;
658 break;
659 case 2:
660 i |= I365_MEM_WS1;
661 break;
662 default:
663 i |= I365_MEM_WS1 | I365_MEM_WS0;
664 break;
665 }
666
667 indirect_write16(sock,base+I365_W_STOP,i);
668
669 /* card start */
670
671 i = ((mem->card_start - region.start) >> 12) & 0x3fff;
672 if (mem->flags & MAP_WRPROT)
673 i |= I365_MEM_WRPROT;
674 if (mem->flags & MAP_ATTRIB) {
675 /* printk("requesting attribute memory for socket %i\n",sock);*/
676 i |= I365_MEM_REG;
677 } else {
678 /* printk("requesting normal memory for socket %i\n",sock);*/
679 }
680 indirect_write16(sock,base+I365_W_OFF,i);
681
682 /* Enable the window if necessary */
683 if (mem->flags & MAP_ACTIVE)
684 indirect_setbit(sock, I365_ADDRWIN, I365_ENA_MEM(map));
685
686 leave("i82092aa_set_mem_map");
687 return 0;
688 }
689
690 static int i82092aa_module_init(void)
691 {
692 return pci_register_driver(&i82092aa_pci_driver);
693 }
694
695 static void i82092aa_module_exit(void)
696 {
697 enter("i82092aa_module_exit");
698 pci_unregister_driver(&i82092aa_pci_driver);
699 if (sockets[0].io_base>0)
700 release_region(sockets[0].io_base, 2);
701 leave("i82092aa_module_exit");
702 }
703
704 module_init(i82092aa_module_init);
705 module_exit(i82092aa_module_exit);
706
kernel source for telekom puls (alcatel/mediatek)