1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Driver for Intel I82092AA PCI-PCMCIA bridge.
4 *
5 * (C) 2001 Red Hat, Inc.
6 *
7 * Author: Arjan Van De Ven <arjanv@redhat.com>
8 * Loosly based on i82365.c from the pcmcia-cs package
9 */
10
11 #include <linux/kernel.h>
12 #include <linux/module.h>
13 #include <linux/pci.h>
14 #include <linux/init.h>
15 #include <linux/workqueue.h>
16 #include <linux/interrupt.h>
17 #include <linux/device.h>
18
19 #include <pcmcia/ss.h>
20
21 #include <linux/io.h>
22
23 #include "i82092aa.h"
24 #include "i82365.h"
25
26 MODULE_LICENSE("GPL");
27
28 /* PCI core routines */
29 static const struct pci_device_id i82092aa_pci_ids[] = {
30 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82092AA_0) },
31 { }
32 };
33 MODULE_DEVICE_TABLE(pci, i82092aa_pci_ids);
34
35 static struct pci_driver i82092aa_pci_driver = {
36 .name = "i82092aa",
37 .id_table = i82092aa_pci_ids,
38 .probe = i82092aa_pci_probe,
39 .remove = i82092aa_pci_remove,
40 };
41
42
43 /* the pccard structure and its functions */
44 static struct pccard_operations i82092aa_operations = {
45 .init = i82092aa_init,
46 .get_status = i82092aa_get_status,
47 .set_socket = i82092aa_set_socket,
48 .set_io_map = i82092aa_set_io_map,
49 .set_mem_map = i82092aa_set_mem_map,
50 };
51
52 /* The card can do up to 4 sockets, allocate a structure for each of them */
53
54 struct socket_info {
55 int number;
56 int card_state;
57 /* 0 = no socket,
58 * 1 = empty socket,
59 * 2 = card but not initialized,
60 * 3 = operational card
61 */
62 unsigned int io_base; /* base io address of the socket */
63
64 struct pcmcia_socket socket;
65 struct pci_dev *dev; /* The PCI device for the socket */
66 };
67
68 #define MAX_SOCKETS 4
69 static struct socket_info sockets[MAX_SOCKETS];
70 static int socket_count; /* shortcut */
71
72
i82092aa_pci_probe(struct pci_dev * dev,const struct pci_device_id * id)73 static int i82092aa_pci_probe(struct pci_dev *dev,
74 const struct pci_device_id *id)
75 {
76 unsigned char configbyte;
77 int i, ret;
78
79 ret = pci_enable_device(dev);
80 if (ret)
81 return ret;
82
83 /* PCI Configuration Control */
84 pci_read_config_byte(dev, 0x40, &configbyte);
85
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 dev_err(&dev->dev,
100 "Oops, you did something we didn't think of.\n");
101 ret = -EIO;
102 goto err_out_disable;
103 }
104 dev_info(&dev->dev, "configured as a %d socket device.\n",
105 socket_count);
106
107 if (!request_region(pci_resource_start(dev, 0), 2, "i82092aa")) {
108 ret = -EBUSY;
109 goto err_out_disable;
110 }
111
112 for (i = 0; i < socket_count; i++) {
113 sockets[i].card_state = 1; /* 1 = present but empty */
114 sockets[i].io_base = pci_resource_start(dev, 0);
115 sockets[i].dev = dev;
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 dev_dbg(&dev->dev, "slot %i is occupied\n", i);
128 } else {
129 dev_dbg(&dev->dev, "slot %i is vacant\n", i);
130 }
131 }
132
133 /* Now, specifiy that all interrupts are to be done as PCI interrupts
134 * bitmask, one bit per event, 1 = PCI interrupt, 0 = ISA interrupt
135 */
136 configbyte = 0xFF;
137
138 /* PCI Interrupt Routing Register */
139 pci_write_config_byte(dev, 0x50, configbyte);
140
141 /* Register the interrupt handler */
142 dev_dbg(&dev->dev, "Requesting interrupt %i\n", dev->irq);
143 ret = request_irq(dev->irq, i82092aa_interrupt, IRQF_SHARED,
144 "i82092aa", i82092aa_interrupt);
145 if (ret) {
146 dev_err(&dev->dev, "Failed to register IRQ %d, aborting\n",
147 dev->irq);
148 goto err_out_free_res;
149 }
150
151 for (i = 0; i < socket_count; i++) {
152 sockets[i].socket.dev.parent = &dev->dev;
153 sockets[i].socket.ops = &i82092aa_operations;
154 sockets[i].socket.resource_ops = &pccard_nonstatic_ops;
155 ret = pcmcia_register_socket(&sockets[i].socket);
156 if (ret)
157 goto err_out_free_sockets;
158 }
159
160 return 0;
161
162 err_out_free_sockets:
163 if (i) {
164 for (i--; i >= 0; i--)
165 pcmcia_unregister_socket(&sockets[i].socket);
166 }
167 free_irq(dev->irq, i82092aa_interrupt);
168 err_out_free_res:
169 release_region(pci_resource_start(dev, 0), 2);
170 err_out_disable:
171 pci_disable_device(dev);
172 return ret;
173 }
174
i82092aa_pci_remove(struct pci_dev * dev)175 static void i82092aa_pci_remove(struct pci_dev *dev)
176 {
177 int i;
178
179 free_irq(dev->irq, i82092aa_interrupt);
180
181 for (i = 0; i < socket_count; i++)
182 pcmcia_unregister_socket(&sockets[i].socket);
183 }
184
185 static DEFINE_SPINLOCK(port_lock);
186
187 /* basic value read/write functions */
188
indirect_read(int socket,unsigned short reg)189 static unsigned char indirect_read(int socket, unsigned short reg)
190 {
191 unsigned short int port;
192 unsigned char val;
193 unsigned long flags;
194
195 spin_lock_irqsave(&port_lock, flags);
196 reg += socket * 0x40;
197 port = sockets[socket].io_base;
198 outb(reg, port);
199 val = inb(port+1);
200 spin_unlock_irqrestore(&port_lock, flags);
201 return val;
202 }
203
indirect_write(int socket,unsigned short reg,unsigned char value)204 static void indirect_write(int socket, unsigned short reg, unsigned char value)
205 {
206 unsigned short int port;
207 unsigned long flags;
208
209 spin_lock_irqsave(&port_lock, flags);
210 reg = reg + socket * 0x40;
211 port = sockets[socket].io_base;
212 outb(reg, port);
213 outb(value, port+1);
214 spin_unlock_irqrestore(&port_lock, flags);
215 }
216
indirect_setbit(int socket,unsigned short reg,unsigned char mask)217 static void indirect_setbit(int socket, unsigned short reg, unsigned char mask)
218 {
219 unsigned short int port;
220 unsigned char val;
221 unsigned long flags;
222
223 spin_lock_irqsave(&port_lock, flags);
224 reg = reg + socket * 0x40;
225 port = sockets[socket].io_base;
226 outb(reg, port);
227 val = inb(port+1);
228 val |= mask;
229 outb(reg, port);
230 outb(val, port+1);
231 spin_unlock_irqrestore(&port_lock, flags);
232 }
233
234
indirect_resetbit(int socket,unsigned short reg,unsigned char mask)235 static void indirect_resetbit(int socket,
236 unsigned short reg, unsigned char mask)
237 {
238 unsigned short int port;
239 unsigned char val;
240 unsigned long flags;
241
242 spin_lock_irqsave(&port_lock, flags);
243 reg = reg + socket * 0x40;
244 port = sockets[socket].io_base;
245 outb(reg, port);
246 val = inb(port+1);
247 val &= ~mask;
248 outb(reg, port);
249 outb(val, port+1);
250 spin_unlock_irqrestore(&port_lock, flags);
251 }
252
indirect_write16(int socket,unsigned short reg,unsigned short value)253 static void indirect_write16(int socket,
254 unsigned short reg, unsigned short value)
255 {
256 unsigned short int port;
257 unsigned char val;
258 unsigned long flags;
259
260 spin_lock_irqsave(&port_lock, flags);
261 reg = reg + socket * 0x40;
262 port = sockets[socket].io_base;
263
264 outb(reg, port);
265 val = value & 255;
266 outb(val, port+1);
267
268 reg++;
269
270 outb(reg, port);
271 val = value>>8;
272 outb(val, port+1);
273 spin_unlock_irqrestore(&port_lock, flags);
274 }
275
276 /* simple helper functions */
277 /* External clock time, in nanoseconds. 120 ns = 8.33 MHz */
278 static int cycle_time = 120;
279
to_cycles(int ns)280 static int to_cycles(int ns)
281 {
282 if (cycle_time != 0)
283 return ns/cycle_time;
284 else
285 return 0;
286 }
287
288
289 /* Interrupt handler functionality */
290
i82092aa_interrupt(int irq,void * dev)291 static irqreturn_t i82092aa_interrupt(int irq, void *dev)
292 {
293 int i;
294 int loopcount = 0;
295 int handled = 0;
296
297 unsigned int events, active = 0;
298
299 while (1) {
300 loopcount++;
301 if (loopcount > 20) {
302 pr_err("i82092aa: infinite eventloop in interrupt\n");
303 break;
304 }
305
306 active = 0;
307
308 for (i = 0; i < socket_count; i++) {
309 int csc;
310
311 /* Inactive socket, should not happen */
312 if (sockets[i].card_state == 0)
313 continue;
314
315 /* card status change register */
316 csc = indirect_read(i, I365_CSC);
317
318 if (csc == 0) /* no events on this socket */
319 continue;
320 handled = 1;
321 events = 0;
322
323 if (csc & I365_CSC_DETECT) {
324 events |= SS_DETECT;
325 dev_info(&sockets[i].dev->dev,
326 "Card detected in socket %i!\n", i);
327 }
328
329 if (indirect_read(i, I365_INTCTL) & I365_PC_IOCARD) {
330 /* For IO/CARDS, bit 0 means "read the card" */
331 if (csc & I365_CSC_STSCHG)
332 events |= SS_STSCHG;
333 } else {
334 /* Check for battery/ready events */
335 if (csc & I365_CSC_BVD1)
336 events |= SS_BATDEAD;
337 if (csc & I365_CSC_BVD2)
338 events |= SS_BATWARN;
339 if (csc & I365_CSC_READY)
340 events |= SS_READY;
341 }
342
343 if (events)
344 pcmcia_parse_events(&sockets[i].socket, events);
345 active |= events;
346 }
347
348 if (active == 0) /* no more events to handle */
349 break;
350 }
351 return IRQ_RETVAL(handled);
352 }
353
354
355
356 /* socket functions */
357
card_present(int socketno)358 static int card_present(int socketno)
359 {
360 unsigned int val;
361
362 if ((socketno < 0) || (socketno >= MAX_SOCKETS))
363 return 0;
364 if (sockets[socketno].io_base == 0)
365 return 0;
366
367
368 val = indirect_read(socketno, 1); /* Interface status register */
369 if ((val&12) == 12)
370 return 1;
371
372 return 0;
373 }
374
set_bridge_state(int sock)375 static void set_bridge_state(int sock)
376 {
377 indirect_write(sock, I365_GBLCTL, 0x00);
378 indirect_write(sock, I365_GENCTL, 0x00);
379
380 indirect_setbit(sock, I365_INTCTL, 0x08);
381 }
382
383
i82092aa_init(struct pcmcia_socket * sock)384 static int i82092aa_init(struct pcmcia_socket *sock)
385 {
386 int i;
387 struct resource res = { .start = 0, .end = 0x0fff };
388 pccard_io_map io = { 0, 0, 0, 0, 1 };
389 pccard_mem_map mem = { .res = &res, };
390
391 for (i = 0; i < 2; i++) {
392 io.map = i;
393 i82092aa_set_io_map(sock, &io);
394 }
395 for (i = 0; i < 5; i++) {
396 mem.map = i;
397 i82092aa_set_mem_map(sock, &mem);
398 }
399
400 return 0;
401 }
402
i82092aa_get_status(struct pcmcia_socket * socket,u_int * value)403 static int i82092aa_get_status(struct pcmcia_socket *socket, u_int *value)
404 {
405 unsigned int sock = container_of(socket,
406 struct socket_info, socket)->number;
407 unsigned int status;
408
409 /* Interface Status Register */
410 status = indirect_read(sock, I365_STATUS);
411
412 *value = 0;
413
414 if ((status & I365_CS_DETECT) == I365_CS_DETECT)
415 *value |= SS_DETECT;
416
417 /* IO cards have a different meaning of bits 0,1 */
418 /* Also notice the inverse-logic on the bits */
419 if (indirect_read(sock, I365_INTCTL) & I365_PC_IOCARD) {
420 /* IO card */
421 if (!(status & I365_CS_STSCHG))
422 *value |= SS_STSCHG;
423 } else { /* non I/O card */
424 if (!(status & I365_CS_BVD1))
425 *value |= SS_BATDEAD;
426 if (!(status & I365_CS_BVD2))
427 *value |= SS_BATWARN;
428 }
429
430 if (status & I365_CS_WRPROT)
431 (*value) |= SS_WRPROT; /* card is write protected */
432
433 if (status & I365_CS_READY)
434 (*value) |= SS_READY; /* card is not busy */
435
436 if (status & I365_CS_POWERON)
437 (*value) |= SS_POWERON; /* power is applied to the card */
438
439 return 0;
440 }
441
442
i82092aa_set_socket(struct pcmcia_socket * socket,socket_state_t * state)443 static int i82092aa_set_socket(struct pcmcia_socket *socket,
444 socket_state_t *state)
445 {
446 struct socket_info *sock_info = container_of(socket, struct socket_info,
447 socket);
448 unsigned int sock = sock_info->number;
449 unsigned char reg;
450
451 /* First, set the global controller options */
452
453 set_bridge_state(sock);
454
455 /* Values for the IGENC register */
456
457 reg = 0;
458
459 /* The reset bit has "inverse" logic */
460 if (!(state->flags & SS_RESET))
461 reg = reg | I365_PC_RESET;
462 if (state->flags & SS_IOCARD)
463 reg = reg | I365_PC_IOCARD;
464
465 /* IGENC, Interrupt and General Control Register */
466 indirect_write(sock, I365_INTCTL, reg);
467
468 /* Power registers */
469
470 reg = I365_PWR_NORESET; /* default: disable resetdrv on resume */
471
472 if (state->flags & SS_PWR_AUTO) {
473 dev_info(&sock_info->dev->dev, "Auto power\n");
474 reg |= I365_PWR_AUTO; /* automatic power mngmnt */
475 }
476 if (state->flags & SS_OUTPUT_ENA) {
477 dev_info(&sock_info->dev->dev, "Power Enabled\n");
478 reg |= I365_PWR_OUT; /* enable power */
479 }
480
481 switch (state->Vcc) {
482 case 0:
483 break;
484 case 50:
485 dev_info(&sock_info->dev->dev,
486 "setting voltage to Vcc to 5V on socket %i\n",
487 sock);
488 reg |= I365_VCC_5V;
489 break;
490 default:
491 dev_err(&sock_info->dev->dev,
492 "%s called with invalid VCC power value: %i",
493 __func__, state->Vcc);
494 return -EINVAL;
495 }
496
497 switch (state->Vpp) {
498 case 0:
499 dev_info(&sock_info->dev->dev,
500 "not setting Vpp on socket %i\n", sock);
501 break;
502 case 50:
503 dev_info(&sock_info->dev->dev,
504 "setting Vpp to 5.0 for socket %i\n", sock);
505 reg |= I365_VPP1_5V | I365_VPP2_5V;
506 break;
507 case 120:
508 dev_info(&sock_info->dev->dev, "setting Vpp to 12.0\n");
509 reg |= I365_VPP1_12V | I365_VPP2_12V;
510 break;
511 default:
512 dev_err(&sock_info->dev->dev,
513 "%s called with invalid VPP power value: %i",
514 __func__, state->Vcc);
515 return -EINVAL;
516 }
517
518 if (reg != indirect_read(sock, I365_POWER)) /* only write if changed */
519 indirect_write(sock, I365_POWER, reg);
520
521 /* Enable specific interrupt events */
522
523 reg = 0x00;
524 if (state->csc_mask & SS_DETECT)
525 reg |= I365_CSC_DETECT;
526 if (state->flags & SS_IOCARD) {
527 if (state->csc_mask & SS_STSCHG)
528 reg |= I365_CSC_STSCHG;
529 } else {
530 if (state->csc_mask & SS_BATDEAD)
531 reg |= I365_CSC_BVD1;
532 if (state->csc_mask & SS_BATWARN)
533 reg |= I365_CSC_BVD2;
534 if (state->csc_mask & SS_READY)
535 reg |= I365_CSC_READY;
536
537 }
538
539 /* now write the value and clear the (probably bogus) pending stuff
540 * by doing a dummy read
541 */
542
543 indirect_write(sock, I365_CSCINT, reg);
544 (void)indirect_read(sock, I365_CSC);
545
546 return 0;
547 }
548
i82092aa_set_io_map(struct pcmcia_socket * socket,struct pccard_io_map * io)549 static int i82092aa_set_io_map(struct pcmcia_socket *socket,
550 struct pccard_io_map *io)
551 {
552 struct socket_info *sock_info = container_of(socket, struct socket_info,
553 socket);
554 unsigned int sock = sock_info->number;
555 unsigned char map, ioctl;
556
557 map = io->map;
558
559 /* Check error conditions */
560 if (map > 1)
561 return -EINVAL;
562
563 if ((io->start > 0xffff) || (io->stop > 0xffff)
564 || (io->stop < io->start))
565 return -EINVAL;
566
567 /* Turn off the window before changing anything */
568 if (indirect_read(sock, I365_ADDRWIN) & I365_ENA_IO(map))
569 indirect_resetbit(sock, I365_ADDRWIN, I365_ENA_IO(map));
570
571 /* write the new values */
572 indirect_write16(sock, I365_IO(map)+I365_W_START, io->start);
573 indirect_write16(sock, I365_IO(map)+I365_W_STOP, io->stop);
574
575 ioctl = indirect_read(sock, I365_IOCTL) & ~I365_IOCTL_MASK(map);
576
577 if (io->flags & (MAP_16BIT|MAP_AUTOSZ))
578 ioctl |= I365_IOCTL_16BIT(map);
579
580 indirect_write(sock, I365_IOCTL, ioctl);
581
582 /* Turn the window back on if needed */
583 if (io->flags & MAP_ACTIVE)
584 indirect_setbit(sock, I365_ADDRWIN, I365_ENA_IO(map));
585
586 return 0;
587 }
588
i82092aa_set_mem_map(struct pcmcia_socket * socket,struct pccard_mem_map * mem)589 static int i82092aa_set_mem_map(struct pcmcia_socket *socket,
590 struct pccard_mem_map *mem)
591 {
592 struct socket_info *sock_info = container_of(socket, struct socket_info,
593 socket);
594 unsigned int sock = sock_info->number;
595 struct pci_bus_region region;
596 unsigned short base, i;
597 unsigned char map;
598
599 pcibios_resource_to_bus(sock_info->dev->bus, ®ion, mem->res);
600
601 map = mem->map;
602 if (map > 4)
603 return -EINVAL;
604
605 if ((mem->card_start > 0x3ffffff) || (region.start > region.end) ||
606 (mem->speed > 1000)) {
607 dev_err(&sock_info->dev->dev,
608 "invalid mem map for socket %i: %llx to %llx with a start of %x\n",
609 sock,
610 (unsigned long long)region.start,
611 (unsigned long long)region.end,
612 mem->card_start);
613 return -EINVAL;
614 }
615
616 /* Turn off the window before changing anything */
617 if (indirect_read(sock, I365_ADDRWIN) & I365_ENA_MEM(map))
618 indirect_resetbit(sock, I365_ADDRWIN, I365_ENA_MEM(map));
619
620 /* write the start address */
621 base = I365_MEM(map);
622 i = (region.start >> 12) & 0x0fff;
623 if (mem->flags & MAP_16BIT)
624 i |= I365_MEM_16BIT;
625 if (mem->flags & MAP_0WS)
626 i |= I365_MEM_0WS;
627 indirect_write16(sock, base+I365_W_START, i);
628
629 /* write the stop address */
630
631 i = (region.end >> 12) & 0x0fff;
632 switch (to_cycles(mem->speed)) {
633 case 0:
634 break;
635 case 1:
636 i |= I365_MEM_WS0;
637 break;
638 case 2:
639 i |= I365_MEM_WS1;
640 break;
641 default:
642 i |= I365_MEM_WS1 | I365_MEM_WS0;
643 break;
644 }
645
646 indirect_write16(sock, base+I365_W_STOP, i);
647
648 /* card start */
649
650 i = ((mem->card_start - region.start) >> 12) & 0x3fff;
651 if (mem->flags & MAP_WRPROT)
652 i |= I365_MEM_WRPROT;
653 if (mem->flags & MAP_ATTRIB)
654 i |= I365_MEM_REG;
655 indirect_write16(sock, base+I365_W_OFF, i);
656
657 /* Enable the window if necessary */
658 if (mem->flags & MAP_ACTIVE)
659 indirect_setbit(sock, I365_ADDRWIN, I365_ENA_MEM(map));
660
661 return 0;
662 }
663
i82092aa_module_init(void)664 static int i82092aa_module_init(void)
665 {
666 return pci_register_driver(&i82092aa_pci_driver);
667 }
668
i82092aa_module_exit(void)669 static void i82092aa_module_exit(void)
670 {
671 pci_unregister_driver(&i82092aa_pci_driver);
672 if (sockets[0].io_base > 0)
673 release_region(sockets[0].io_base, 2);
674 }
675
676 module_init(i82092aa_module_init);
677 module_exit(i82092aa_module_exit);
678
679