xref: /openbmc/linux/drivers/pcmcia/yenta_socket.c (revision 8ffdff6a)
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Regular cardbus driver ("yenta_socket")
4  *
5  * (C) Copyright 1999, 2000 Linus Torvalds
6  *
7  * Changelog:
8  * Aug 2002: Manfred Spraul <manfred@colorfullife.com>
9  * 	Dynamically adjust the size of the bridge resource
10  *
11  * May 2003: Dominik Brodowski <linux@brodo.de>
12  * 	Merge pci_socket.c and yenta.c into one file
13  */
14 #include <linux/init.h>
15 #include <linux/pci.h>
16 #include <linux/workqueue.h>
17 #include <linux/interrupt.h>
18 #include <linux/delay.h>
19 #include <linux/module.h>
20 #include <linux/io.h>
21 #include <linux/slab.h>
22 
23 #include <pcmcia/ss.h>
24 
25 #include "yenta_socket.h"
26 #include "i82365.h"
27 
28 static bool disable_clkrun;
29 module_param(disable_clkrun, bool, 0444);
30 MODULE_PARM_DESC(disable_clkrun,
31 		 "If PC card doesn't function properly, please try this option (TI and Ricoh bridges only)");
32 
33 static bool isa_probe = 1;
34 module_param(isa_probe, bool, 0444);
35 MODULE_PARM_DESC(isa_probe, "If set ISA interrupts are probed (default). Set to N to disable probing");
36 
37 static bool pwr_irqs_off;
38 module_param(pwr_irqs_off, bool, 0644);
39 MODULE_PARM_DESC(pwr_irqs_off, "Force IRQs off during power-on of slot. Use only when seeing IRQ storms!");
40 
41 static char o2_speedup[] = "default";
42 module_param_string(o2_speedup, o2_speedup, sizeof(o2_speedup), 0444);
43 MODULE_PARM_DESC(o2_speedup, "Use prefetch/burst for O2-bridges: 'on', 'off' "
44 	"or 'default' (uses recommended behaviour for the detected bridge)");
45 
46 /*
47  * Only probe "regular" interrupts, don't
48  * touch dangerous spots like the mouse irq,
49  * because there are mice that apparently
50  * get really confused if they get fondled
51  * too intimately.
52  *
53  * Default to 11, 10, 9, 7, 6, 5, 4, 3.
54  */
55 static u32 isa_interrupts = 0x0ef8;
56 
57 
58 #define debug(x, s, args...) dev_dbg(&s->dev->dev, x, ##args)
59 
60 /* Don't ask.. */
61 #define to_cycles(ns)	((ns)/120)
62 #define to_ns(cycles)	((cycles)*120)
63 
64 /*
65  * yenta PCI irq probing.
66  * currently only used in the TI/EnE initialization code
67  */
68 #ifdef CONFIG_YENTA_TI
69 static int yenta_probe_cb_irq(struct yenta_socket *socket);
70 static unsigned int yenta_probe_irq(struct yenta_socket *socket,
71 				u32 isa_irq_mask);
72 #endif
73 
74 
75 static unsigned int override_bios;
76 module_param(override_bios, uint, 0000);
77 MODULE_PARM_DESC(override_bios, "yenta ignore bios resource allocation");
78 
79 /*
80  * Generate easy-to-use ways of reading a cardbus sockets
81  * regular memory space ("cb_xxx"), configuration space
82  * ("config_xxx") and compatibility space ("exca_xxxx")
83  */
84 static inline u32 cb_readl(struct yenta_socket *socket, unsigned reg)
85 {
86 	u32 val = readl(socket->base + reg);
87 	debug("%04x %08x\n", socket, reg, val);
88 	return val;
89 }
90 
91 static inline void cb_writel(struct yenta_socket *socket, unsigned reg, u32 val)
92 {
93 	debug("%04x %08x\n", socket, reg, val);
94 	writel(val, socket->base + reg);
95 	readl(socket->base + reg); /* avoid problems with PCI write posting */
96 }
97 
98 static inline u8 config_readb(struct yenta_socket *socket, unsigned offset)
99 {
100 	u8 val;
101 	pci_read_config_byte(socket->dev, offset, &val);
102 	debug("%04x %02x\n", socket, offset, val);
103 	return val;
104 }
105 
106 static inline u16 config_readw(struct yenta_socket *socket, unsigned offset)
107 {
108 	u16 val;
109 	pci_read_config_word(socket->dev, offset, &val);
110 	debug("%04x %04x\n", socket, offset, val);
111 	return val;
112 }
113 
114 static inline u32 config_readl(struct yenta_socket *socket, unsigned offset)
115 {
116 	u32 val;
117 	pci_read_config_dword(socket->dev, offset, &val);
118 	debug("%04x %08x\n", socket, offset, val);
119 	return val;
120 }
121 
122 static inline void config_writeb(struct yenta_socket *socket, unsigned offset, u8 val)
123 {
124 	debug("%04x %02x\n", socket, offset, val);
125 	pci_write_config_byte(socket->dev, offset, val);
126 }
127 
128 static inline void config_writew(struct yenta_socket *socket, unsigned offset, u16 val)
129 {
130 	debug("%04x %04x\n", socket, offset, val);
131 	pci_write_config_word(socket->dev, offset, val);
132 }
133 
134 static inline void config_writel(struct yenta_socket *socket, unsigned offset, u32 val)
135 {
136 	debug("%04x %08x\n", socket, offset, val);
137 	pci_write_config_dword(socket->dev, offset, val);
138 }
139 
140 static inline u8 exca_readb(struct yenta_socket *socket, unsigned reg)
141 {
142 	u8 val = readb(socket->base + 0x800 + reg);
143 	debug("%04x %02x\n", socket, reg, val);
144 	return val;
145 }
146 
147 static inline u8 exca_readw(struct yenta_socket *socket, unsigned reg)
148 {
149 	u16 val;
150 	val = readb(socket->base + 0x800 + reg);
151 	val |= readb(socket->base + 0x800 + reg + 1) << 8;
152 	debug("%04x %04x\n", socket, reg, val);
153 	return val;
154 }
155 
156 static inline void exca_writeb(struct yenta_socket *socket, unsigned reg, u8 val)
157 {
158 	debug("%04x %02x\n", socket, reg, val);
159 	writeb(val, socket->base + 0x800 + reg);
160 	readb(socket->base + 0x800 + reg); /* PCI write posting... */
161 }
162 
163 static void exca_writew(struct yenta_socket *socket, unsigned reg, u16 val)
164 {
165 	debug("%04x %04x\n", socket, reg, val);
166 	writeb(val, socket->base + 0x800 + reg);
167 	writeb(val >> 8, socket->base + 0x800 + reg + 1);
168 
169 	/* PCI write posting... */
170 	readb(socket->base + 0x800 + reg);
171 	readb(socket->base + 0x800 + reg + 1);
172 }
173 
174 static ssize_t show_yenta_registers(struct device *yentadev, struct device_attribute *attr, char *buf)
175 {
176 	struct yenta_socket *socket = dev_get_drvdata(yentadev);
177 	int offset = 0, i;
178 
179 	offset = snprintf(buf, PAGE_SIZE, "CB registers:");
180 	for (i = 0; i < 0x24; i += 4) {
181 		unsigned val;
182 		if (!(i & 15))
183 			offset += scnprintf(buf + offset, PAGE_SIZE - offset, "\n%02x:", i);
184 		val = cb_readl(socket, i);
185 		offset += scnprintf(buf + offset, PAGE_SIZE - offset, " %08x", val);
186 	}
187 
188 	offset += scnprintf(buf + offset, PAGE_SIZE - offset, "\n\nExCA registers:");
189 	for (i = 0; i < 0x45; i++) {
190 		unsigned char val;
191 		if (!(i & 7)) {
192 			if (i & 8) {
193 				memcpy(buf + offset, " -", 2);
194 				offset += 2;
195 			} else
196 				offset += scnprintf(buf + offset, PAGE_SIZE - offset, "\n%02x:", i);
197 		}
198 		val = exca_readb(socket, i);
199 		offset += scnprintf(buf + offset, PAGE_SIZE - offset, " %02x", val);
200 	}
201 	buf[offset++] = '\n';
202 	return offset;
203 }
204 
205 static DEVICE_ATTR(yenta_registers, S_IRUSR, show_yenta_registers, NULL);
206 
207 /*
208  * Ugh, mixed-mode cardbus and 16-bit pccard state: things depend
209  * on what kind of card is inserted..
210  */
211 static int yenta_get_status(struct pcmcia_socket *sock, unsigned int *value)
212 {
213 	struct yenta_socket *socket = container_of(sock, struct yenta_socket, socket);
214 	unsigned int val;
215 	u32 state = cb_readl(socket, CB_SOCKET_STATE);
216 
217 	val  = (state & CB_3VCARD) ? SS_3VCARD : 0;
218 	val |= (state & CB_XVCARD) ? SS_XVCARD : 0;
219 	val |= (state & (CB_5VCARD | CB_3VCARD | CB_XVCARD | CB_YVCARD)) ? 0 : SS_PENDING;
220 	val |= (state & (CB_CDETECT1 | CB_CDETECT2)) ? SS_PENDING : 0;
221 
222 
223 	if (state & CB_CBCARD) {
224 		val |= SS_CARDBUS;
225 		val |= (state & CB_CARDSTS) ? SS_STSCHG : 0;
226 		val |= (state & (CB_CDETECT1 | CB_CDETECT2)) ? 0 : SS_DETECT;
227 		val |= (state & CB_PWRCYCLE) ? SS_POWERON | SS_READY : 0;
228 	} else if (state & CB_16BITCARD) {
229 		u8 status = exca_readb(socket, I365_STATUS);
230 		val |= ((status & I365_CS_DETECT) == I365_CS_DETECT) ? SS_DETECT : 0;
231 		if (exca_readb(socket, I365_INTCTL) & I365_PC_IOCARD) {
232 			val |= (status & I365_CS_STSCHG) ? 0 : SS_STSCHG;
233 		} else {
234 			val |= (status & I365_CS_BVD1) ? 0 : SS_BATDEAD;
235 			val |= (status & I365_CS_BVD2) ? 0 : SS_BATWARN;
236 		}
237 		val |= (status & I365_CS_WRPROT) ? SS_WRPROT : 0;
238 		val |= (status & I365_CS_READY) ? SS_READY : 0;
239 		val |= (status & I365_CS_POWERON) ? SS_POWERON : 0;
240 	}
241 
242 	*value = val;
243 	return 0;
244 }
245 
246 static void yenta_set_power(struct yenta_socket *socket, socket_state_t *state)
247 {
248 	/* some birdges require to use the ExCA registers to power 16bit cards */
249 	if (!(cb_readl(socket, CB_SOCKET_STATE) & CB_CBCARD) &&
250 	    (socket->flags & YENTA_16BIT_POWER_EXCA)) {
251 		u8 reg, old;
252 		reg = old = exca_readb(socket, I365_POWER);
253 		reg &= ~(I365_VCC_MASK | I365_VPP1_MASK | I365_VPP2_MASK);
254 
255 		/* i82365SL-DF style */
256 		if (socket->flags & YENTA_16BIT_POWER_DF) {
257 			switch (state->Vcc) {
258 			case 33:
259 				reg |= I365_VCC_3V;
260 				break;
261 			case 50:
262 				reg |= I365_VCC_5V;
263 				break;
264 			default:
265 				reg = 0;
266 				break;
267 			}
268 			switch (state->Vpp) {
269 			case 33:
270 			case 50:
271 				reg |= I365_VPP1_5V;
272 				break;
273 			case 120:
274 				reg |= I365_VPP1_12V;
275 				break;
276 			}
277 		} else {
278 			/* i82365SL-B style */
279 			switch (state->Vcc) {
280 			case 50:
281 				reg |= I365_VCC_5V;
282 				break;
283 			default:
284 				reg = 0;
285 				break;
286 			}
287 			switch (state->Vpp) {
288 			case 50:
289 				reg |= I365_VPP1_5V | I365_VPP2_5V;
290 				break;
291 			case 120:
292 				reg |= I365_VPP1_12V | I365_VPP2_12V;
293 				break;
294 			}
295 		}
296 
297 		if (reg != old)
298 			exca_writeb(socket, I365_POWER, reg);
299 	} else {
300 		u32 reg = 0;	/* CB_SC_STPCLK? */
301 		switch (state->Vcc) {
302 		case 33:
303 			reg = CB_SC_VCC_3V;
304 			break;
305 		case 50:
306 			reg = CB_SC_VCC_5V;
307 			break;
308 		default:
309 			reg = 0;
310 			break;
311 		}
312 		switch (state->Vpp) {
313 		case 33:
314 			reg |= CB_SC_VPP_3V;
315 			break;
316 		case 50:
317 			reg |= CB_SC_VPP_5V;
318 			break;
319 		case 120:
320 			reg |= CB_SC_VPP_12V;
321 			break;
322 		}
323 		if (reg != cb_readl(socket, CB_SOCKET_CONTROL))
324 			cb_writel(socket, CB_SOCKET_CONTROL, reg);
325 	}
326 }
327 
328 static int yenta_set_socket(struct pcmcia_socket *sock, socket_state_t *state)
329 {
330 	struct yenta_socket *socket = container_of(sock, struct yenta_socket, socket);
331 	u16 bridge;
332 
333 	/* if powering down: do it immediately */
334 	if (state->Vcc == 0)
335 		yenta_set_power(socket, state);
336 
337 	socket->io_irq = state->io_irq;
338 	bridge = config_readw(socket, CB_BRIDGE_CONTROL) & ~(CB_BRIDGE_CRST | CB_BRIDGE_INTR);
339 	if (cb_readl(socket, CB_SOCKET_STATE) & CB_CBCARD) {
340 		u8 intr;
341 		bridge |= (state->flags & SS_RESET) ? CB_BRIDGE_CRST : 0;
342 
343 		/* ISA interrupt control? */
344 		intr = exca_readb(socket, I365_INTCTL);
345 		intr = (intr & ~0xf);
346 		if (!socket->dev->irq) {
347 			intr |= socket->cb_irq ? socket->cb_irq : state->io_irq;
348 			bridge |= CB_BRIDGE_INTR;
349 		}
350 		exca_writeb(socket, I365_INTCTL, intr);
351 	}  else {
352 		u8 reg;
353 
354 		reg = exca_readb(socket, I365_INTCTL) & (I365_RING_ENA | I365_INTR_ENA);
355 		reg |= (state->flags & SS_RESET) ? 0 : I365_PC_RESET;
356 		reg |= (state->flags & SS_IOCARD) ? I365_PC_IOCARD : 0;
357 		if (state->io_irq != socket->dev->irq) {
358 			reg |= state->io_irq;
359 			bridge |= CB_BRIDGE_INTR;
360 		}
361 		exca_writeb(socket, I365_INTCTL, reg);
362 
363 		reg = exca_readb(socket, I365_POWER) & (I365_VCC_MASK|I365_VPP1_MASK);
364 		reg |= I365_PWR_NORESET;
365 		if (state->flags & SS_PWR_AUTO)
366 			reg |= I365_PWR_AUTO;
367 		if (state->flags & SS_OUTPUT_ENA)
368 			reg |= I365_PWR_OUT;
369 		if (exca_readb(socket, I365_POWER) != reg)
370 			exca_writeb(socket, I365_POWER, reg);
371 
372 		/* CSC interrupt: no ISA irq for CSC */
373 		reg = exca_readb(socket, I365_CSCINT);
374 		reg &= I365_CSC_IRQ_MASK;
375 		reg |= I365_CSC_DETECT;
376 		if (state->flags & SS_IOCARD) {
377 			if (state->csc_mask & SS_STSCHG)
378 				reg |= I365_CSC_STSCHG;
379 		} else {
380 			if (state->csc_mask & SS_BATDEAD)
381 				reg |= I365_CSC_BVD1;
382 			if (state->csc_mask & SS_BATWARN)
383 				reg |= I365_CSC_BVD2;
384 			if (state->csc_mask & SS_READY)
385 				reg |= I365_CSC_READY;
386 		}
387 		exca_writeb(socket, I365_CSCINT, reg);
388 		exca_readb(socket, I365_CSC);
389 		if (sock->zoom_video)
390 			sock->zoom_video(sock, state->flags & SS_ZVCARD);
391 	}
392 	config_writew(socket, CB_BRIDGE_CONTROL, bridge);
393 	/* Socket event mask: get card insert/remove events.. */
394 	cb_writel(socket, CB_SOCKET_EVENT, -1);
395 	cb_writel(socket, CB_SOCKET_MASK, CB_CDMASK);
396 
397 	/* if powering up: do it as the last step when the socket is configured */
398 	if (state->Vcc != 0)
399 		yenta_set_power(socket, state);
400 	return 0;
401 }
402 
403 static int yenta_set_io_map(struct pcmcia_socket *sock, struct pccard_io_map *io)
404 {
405 	struct yenta_socket *socket = container_of(sock, struct yenta_socket, socket);
406 	int map;
407 	unsigned char ioctl, addr, enable;
408 
409 	map = io->map;
410 
411 	if (map > 1)
412 		return -EINVAL;
413 
414 	enable = I365_ENA_IO(map);
415 	addr = exca_readb(socket, I365_ADDRWIN);
416 
417 	/* Disable the window before changing it.. */
418 	if (addr & enable) {
419 		addr &= ~enable;
420 		exca_writeb(socket, I365_ADDRWIN, addr);
421 	}
422 
423 	exca_writew(socket, I365_IO(map)+I365_W_START, io->start);
424 	exca_writew(socket, I365_IO(map)+I365_W_STOP, io->stop);
425 
426 	ioctl = exca_readb(socket, I365_IOCTL) & ~I365_IOCTL_MASK(map);
427 	if (io->flags & MAP_0WS)
428 		ioctl |= I365_IOCTL_0WS(map);
429 	if (io->flags & MAP_16BIT)
430 		ioctl |= I365_IOCTL_16BIT(map);
431 	if (io->flags & MAP_AUTOSZ)
432 		ioctl |= I365_IOCTL_IOCS16(map);
433 	exca_writeb(socket, I365_IOCTL, ioctl);
434 
435 	if (io->flags & MAP_ACTIVE)
436 		exca_writeb(socket, I365_ADDRWIN, addr | enable);
437 	return 0;
438 }
439 
440 static int yenta_set_mem_map(struct pcmcia_socket *sock, struct pccard_mem_map *mem)
441 {
442 	struct yenta_socket *socket = container_of(sock, struct yenta_socket, socket);
443 	struct pci_bus_region region;
444 	int map;
445 	unsigned char addr, enable;
446 	unsigned int start, stop, card_start;
447 	unsigned short word;
448 
449 	pcibios_resource_to_bus(socket->dev->bus, &region, mem->res);
450 
451 	map = mem->map;
452 	start = region.start;
453 	stop = region.end;
454 	card_start = mem->card_start;
455 
456 	if (map > 4 || start > stop || ((start ^ stop) >> 24) ||
457 	    (card_start >> 26) || mem->speed > 1000)
458 		return -EINVAL;
459 
460 	enable = I365_ENA_MEM(map);
461 	addr = exca_readb(socket, I365_ADDRWIN);
462 	if (addr & enable) {
463 		addr &= ~enable;
464 		exca_writeb(socket, I365_ADDRWIN, addr);
465 	}
466 
467 	exca_writeb(socket, CB_MEM_PAGE(map), start >> 24);
468 
469 	word = (start >> 12) & 0x0fff;
470 	if (mem->flags & MAP_16BIT)
471 		word |= I365_MEM_16BIT;
472 	if (mem->flags & MAP_0WS)
473 		word |= I365_MEM_0WS;
474 	exca_writew(socket, I365_MEM(map) + I365_W_START, word);
475 
476 	word = (stop >> 12) & 0x0fff;
477 	switch (to_cycles(mem->speed)) {
478 	case 0:
479 		break;
480 	case 1:
481 		word |= I365_MEM_WS0;
482 		break;
483 	case 2:
484 		word |= I365_MEM_WS1;
485 		break;
486 	default:
487 		word |= I365_MEM_WS1 | I365_MEM_WS0;
488 		break;
489 	}
490 	exca_writew(socket, I365_MEM(map) + I365_W_STOP, word);
491 
492 	word = ((card_start - start) >> 12) & 0x3fff;
493 	if (mem->flags & MAP_WRPROT)
494 		word |= I365_MEM_WRPROT;
495 	if (mem->flags & MAP_ATTRIB)
496 		word |= I365_MEM_REG;
497 	exca_writew(socket, I365_MEM(map) + I365_W_OFF, word);
498 
499 	if (mem->flags & MAP_ACTIVE)
500 		exca_writeb(socket, I365_ADDRWIN, addr | enable);
501 	return 0;
502 }
503 
504 
505 
506 static irqreturn_t yenta_interrupt(int irq, void *dev_id)
507 {
508 	unsigned int events;
509 	struct yenta_socket *socket = (struct yenta_socket *) dev_id;
510 	u8 csc;
511 	u32 cb_event;
512 
513 	/* Clear interrupt status for the event */
514 	cb_event = cb_readl(socket, CB_SOCKET_EVENT);
515 	cb_writel(socket, CB_SOCKET_EVENT, cb_event);
516 
517 	csc = exca_readb(socket, I365_CSC);
518 
519 	if (!(cb_event || csc))
520 		return IRQ_NONE;
521 
522 	events = (cb_event & (CB_CD1EVENT | CB_CD2EVENT)) ? SS_DETECT : 0 ;
523 	events |= (csc & I365_CSC_DETECT) ? SS_DETECT : 0;
524 	if (exca_readb(socket, I365_INTCTL) & I365_PC_IOCARD) {
525 		events |= (csc & I365_CSC_STSCHG) ? SS_STSCHG : 0;
526 	} else {
527 		events |= (csc & I365_CSC_BVD1) ? SS_BATDEAD : 0;
528 		events |= (csc & I365_CSC_BVD2) ? SS_BATWARN : 0;
529 		events |= (csc & I365_CSC_READY) ? SS_READY : 0;
530 	}
531 
532 	if (events)
533 		pcmcia_parse_events(&socket->socket, events);
534 
535 	return IRQ_HANDLED;
536 }
537 
538 static void yenta_interrupt_wrapper(struct timer_list *t)
539 {
540 	struct yenta_socket *socket = from_timer(socket, t, poll_timer);
541 
542 	yenta_interrupt(0, (void *)socket);
543 	socket->poll_timer.expires = jiffies + HZ;
544 	add_timer(&socket->poll_timer);
545 }
546 
547 static void yenta_clear_maps(struct yenta_socket *socket)
548 {
549 	int i;
550 	struct resource res = { .start = 0, .end = 0x0fff };
551 	pccard_io_map io = { 0, 0, 0, 0, 1 };
552 	pccard_mem_map mem = { .res = &res, };
553 
554 	yenta_set_socket(&socket->socket, &dead_socket);
555 	for (i = 0; i < 2; i++) {
556 		io.map = i;
557 		yenta_set_io_map(&socket->socket, &io);
558 	}
559 	for (i = 0; i < 5; i++) {
560 		mem.map = i;
561 		yenta_set_mem_map(&socket->socket, &mem);
562 	}
563 }
564 
565 /* redoes voltage interrogation if required */
566 static void yenta_interrogate(struct yenta_socket *socket)
567 {
568 	u32 state;
569 
570 	state = cb_readl(socket, CB_SOCKET_STATE);
571 	if (!(state & (CB_5VCARD | CB_3VCARD | CB_XVCARD | CB_YVCARD)) ||
572 	    (state & (CB_CDETECT1 | CB_CDETECT2 | CB_NOTACARD | CB_BADVCCREQ)) ||
573 	    ((state & (CB_16BITCARD | CB_CBCARD)) == (CB_16BITCARD | CB_CBCARD)))
574 		cb_writel(socket, CB_SOCKET_FORCE, CB_CVSTEST);
575 }
576 
577 /* Called at resume and initialization events */
578 static int yenta_sock_init(struct pcmcia_socket *sock)
579 {
580 	struct yenta_socket *socket = container_of(sock, struct yenta_socket, socket);
581 
582 	exca_writeb(socket, I365_GBLCTL, 0x00);
583 	exca_writeb(socket, I365_GENCTL, 0x00);
584 
585 	/* Redo card voltage interrogation */
586 	yenta_interrogate(socket);
587 
588 	yenta_clear_maps(socket);
589 
590 	if (socket->type && socket->type->sock_init)
591 		socket->type->sock_init(socket);
592 
593 	/* Re-enable CSC interrupts */
594 	cb_writel(socket, CB_SOCKET_MASK, CB_CDMASK);
595 
596 	return 0;
597 }
598 
599 static int yenta_sock_suspend(struct pcmcia_socket *sock)
600 {
601 	struct yenta_socket *socket = container_of(sock, struct yenta_socket, socket);
602 
603 	/* Disable CSC interrupts */
604 	cb_writel(socket, CB_SOCKET_MASK, 0x0);
605 
606 	return 0;
607 }
608 
609 /*
610  * Use an adaptive allocation for the memory resource,
611  * sometimes the memory behind pci bridges is limited:
612  * 1/8 of the size of the io window of the parent.
613  * max 4 MB, min 16 kB. We try very hard to not get below
614  * the "ACC" values, though.
615  */
616 #define BRIDGE_MEM_MAX (4*1024*1024)
617 #define BRIDGE_MEM_ACC (128*1024)
618 #define BRIDGE_MEM_MIN (16*1024)
619 
620 #define BRIDGE_IO_MAX 512
621 #define BRIDGE_IO_ACC 256
622 #define BRIDGE_IO_MIN 32
623 
624 #ifndef PCIBIOS_MIN_CARDBUS_IO
625 #define PCIBIOS_MIN_CARDBUS_IO PCIBIOS_MIN_IO
626 #endif
627 
628 static int yenta_search_one_res(struct resource *root, struct resource *res,
629 				u32 min)
630 {
631 	u32 align, size, start, end;
632 
633 	if (res->flags & IORESOURCE_IO) {
634 		align = 1024;
635 		size = BRIDGE_IO_MAX;
636 		start = PCIBIOS_MIN_CARDBUS_IO;
637 		end = ~0U;
638 	} else {
639 		unsigned long avail = root->end - root->start;
640 		int i;
641 		size = BRIDGE_MEM_MAX;
642 		if (size > avail/8) {
643 			size = (avail+1)/8;
644 			/* round size down to next power of 2 */
645 			i = 0;
646 			while ((size /= 2) != 0)
647 				i++;
648 			size = 1 << i;
649 		}
650 		if (size < min)
651 			size = min;
652 		align = size;
653 		start = PCIBIOS_MIN_MEM;
654 		end = ~0U;
655 	}
656 
657 	do {
658 		if (allocate_resource(root, res, size, start, end, align,
659 				      NULL, NULL) == 0) {
660 			return 1;
661 		}
662 		size = size/2;
663 		align = size;
664 	} while (size >= min);
665 
666 	return 0;
667 }
668 
669 
670 static int yenta_search_res(struct yenta_socket *socket, struct resource *res,
671 			    u32 min)
672 {
673 	struct resource *root;
674 	int i;
675 
676 	pci_bus_for_each_resource(socket->dev->bus, root, i) {
677 		if (!root)
678 			continue;
679 
680 		if ((res->flags ^ root->flags) &
681 		    (IORESOURCE_IO | IORESOURCE_MEM | IORESOURCE_PREFETCH))
682 			continue; /* Wrong type */
683 
684 		if (yenta_search_one_res(root, res, min))
685 			return 1;
686 	}
687 	return 0;
688 }
689 
690 static int yenta_allocate_res(struct yenta_socket *socket, int nr, unsigned type, int addr_start, int addr_end)
691 {
692 	struct pci_dev *dev = socket->dev;
693 	struct resource *res;
694 	struct pci_bus_region region;
695 	unsigned mask;
696 
697 	res = &dev->resource[nr];
698 	/* Already allocated? */
699 	if (res->parent)
700 		return 0;
701 
702 	/* The granularity of the memory limit is 4kB, on IO it's 4 bytes */
703 	mask = ~0xfff;
704 	if (type & IORESOURCE_IO)
705 		mask = ~3;
706 
707 	res->name = dev->subordinate->name;
708 	res->flags = type;
709 
710 	region.start = config_readl(socket, addr_start) & mask;
711 	region.end = config_readl(socket, addr_end) | ~mask;
712 	if (region.start && region.end > region.start && !override_bios) {
713 		pcibios_bus_to_resource(dev->bus, res, &region);
714 		if (pci_claim_resource(dev, nr) == 0)
715 			return 0;
716 		dev_info(&dev->dev,
717 			 "Preassigned resource %d busy or not available, reconfiguring...\n",
718 			 nr);
719 	}
720 
721 	if (type & IORESOURCE_IO) {
722 		if ((yenta_search_res(socket, res, BRIDGE_IO_MAX)) ||
723 		    (yenta_search_res(socket, res, BRIDGE_IO_ACC)) ||
724 		    (yenta_search_res(socket, res, BRIDGE_IO_MIN)))
725 			return 1;
726 	} else {
727 		if (type & IORESOURCE_PREFETCH) {
728 			if ((yenta_search_res(socket, res, BRIDGE_MEM_MAX)) ||
729 			    (yenta_search_res(socket, res, BRIDGE_MEM_ACC)) ||
730 			    (yenta_search_res(socket, res, BRIDGE_MEM_MIN)))
731 				return 1;
732 			/* Approximating prefetchable by non-prefetchable */
733 			res->flags = IORESOURCE_MEM;
734 		}
735 		if ((yenta_search_res(socket, res, BRIDGE_MEM_MAX)) ||
736 		    (yenta_search_res(socket, res, BRIDGE_MEM_ACC)) ||
737 		    (yenta_search_res(socket, res, BRIDGE_MEM_MIN)))
738 			return 1;
739 	}
740 
741 	dev_info(&dev->dev,
742 		 "no resource of type %x available, trying to continue...\n",
743 		 type);
744 	res->start = res->end = res->flags = 0;
745 	return 0;
746 }
747 
748 static void yenta_free_res(struct yenta_socket *socket, int nr)
749 {
750 	struct pci_dev *dev = socket->dev;
751 	struct resource *res;
752 
753 	res = &dev->resource[nr];
754 	if (res->start != 0 && res->end != 0)
755 		release_resource(res);
756 
757 	res->start = res->end = res->flags = 0;
758 }
759 
760 /*
761  * Allocate the bridge mappings for the device..
762  */
763 static void yenta_allocate_resources(struct yenta_socket *socket)
764 {
765 	int program = 0;
766 	program += yenta_allocate_res(socket, PCI_CB_BRIDGE_IO_0_WINDOW,
767 			   IORESOURCE_IO,
768 			   PCI_CB_IO_BASE_0, PCI_CB_IO_LIMIT_0);
769 	program += yenta_allocate_res(socket, PCI_CB_BRIDGE_IO_1_WINDOW,
770 			   IORESOURCE_IO,
771 			   PCI_CB_IO_BASE_1, PCI_CB_IO_LIMIT_1);
772 	program += yenta_allocate_res(socket, PCI_CB_BRIDGE_MEM_0_WINDOW,
773 			   IORESOURCE_MEM | IORESOURCE_PREFETCH,
774 			   PCI_CB_MEMORY_BASE_0, PCI_CB_MEMORY_LIMIT_0);
775 	program += yenta_allocate_res(socket, PCI_CB_BRIDGE_MEM_1_WINDOW,
776 			   IORESOURCE_MEM,
777 			   PCI_CB_MEMORY_BASE_1, PCI_CB_MEMORY_LIMIT_1);
778 	if (program)
779 		pci_setup_cardbus(socket->dev->subordinate);
780 }
781 
782 
783 /*
784  * Free the bridge mappings for the device..
785  */
786 static void yenta_free_resources(struct yenta_socket *socket)
787 {
788 	yenta_free_res(socket, PCI_CB_BRIDGE_IO_0_WINDOW);
789 	yenta_free_res(socket, PCI_CB_BRIDGE_IO_1_WINDOW);
790 	yenta_free_res(socket, PCI_CB_BRIDGE_MEM_0_WINDOW);
791 	yenta_free_res(socket, PCI_CB_BRIDGE_MEM_1_WINDOW);
792 }
793 
794 
795 /*
796  * Close it down - release our resources and go home..
797  */
798 static void yenta_close(struct pci_dev *dev)
799 {
800 	struct yenta_socket *sock = pci_get_drvdata(dev);
801 
802 	/* Remove the register attributes */
803 	device_remove_file(&dev->dev, &dev_attr_yenta_registers);
804 
805 	/* we don't want a dying socket registered */
806 	pcmcia_unregister_socket(&sock->socket);
807 
808 	/* Disable all events so we don't die in an IRQ storm */
809 	cb_writel(sock, CB_SOCKET_MASK, 0x0);
810 	exca_writeb(sock, I365_CSCINT, 0);
811 
812 	if (sock->cb_irq)
813 		free_irq(sock->cb_irq, sock);
814 	else
815 		del_timer_sync(&sock->poll_timer);
816 
817 	iounmap(sock->base);
818 	yenta_free_resources(sock);
819 
820 	pci_release_regions(dev);
821 	pci_disable_device(dev);
822 	pci_set_drvdata(dev, NULL);
823 	kfree(sock);
824 }
825 
826 
827 static struct pccard_operations yenta_socket_operations = {
828 	.init			= yenta_sock_init,
829 	.suspend		= yenta_sock_suspend,
830 	.get_status		= yenta_get_status,
831 	.set_socket		= yenta_set_socket,
832 	.set_io_map		= yenta_set_io_map,
833 	.set_mem_map		= yenta_set_mem_map,
834 };
835 
836 
837 #ifdef CONFIG_YENTA_TI
838 #include "ti113x.h"
839 #endif
840 #ifdef CONFIG_YENTA_RICOH
841 #include "ricoh.h"
842 #endif
843 #ifdef CONFIG_YENTA_TOSHIBA
844 #include "topic.h"
845 #endif
846 #ifdef CONFIG_YENTA_O2
847 #include "o2micro.h"
848 #endif
849 
850 enum {
851 	CARDBUS_TYPE_DEFAULT = -1,
852 	CARDBUS_TYPE_TI,
853 	CARDBUS_TYPE_TI113X,
854 	CARDBUS_TYPE_TI12XX,
855 	CARDBUS_TYPE_TI1250,
856 	CARDBUS_TYPE_RICOH,
857 	CARDBUS_TYPE_TOPIC95,
858 	CARDBUS_TYPE_TOPIC97,
859 	CARDBUS_TYPE_O2MICRO,
860 	CARDBUS_TYPE_ENE,
861 };
862 
863 /*
864  * Different cardbus controllers have slightly different
865  * initialization sequences etc details. List them here..
866  */
867 static struct cardbus_type cardbus_type[] = {
868 #ifdef CONFIG_YENTA_TI
869 	[CARDBUS_TYPE_TI]	= {
870 		.override	= ti_override,
871 		.save_state	= ti_save_state,
872 		.restore_state	= ti_restore_state,
873 		.sock_init	= ti_init,
874 	},
875 	[CARDBUS_TYPE_TI113X]	= {
876 		.override	= ti113x_override,
877 		.save_state	= ti_save_state,
878 		.restore_state	= ti_restore_state,
879 		.sock_init	= ti_init,
880 	},
881 	[CARDBUS_TYPE_TI12XX]	= {
882 		.override	= ti12xx_override,
883 		.save_state	= ti_save_state,
884 		.restore_state	= ti_restore_state,
885 		.sock_init	= ti_init,
886 	},
887 	[CARDBUS_TYPE_TI1250]	= {
888 		.override	= ti1250_override,
889 		.save_state	= ti_save_state,
890 		.restore_state	= ti_restore_state,
891 		.sock_init	= ti_init,
892 	},
893 	[CARDBUS_TYPE_ENE]	= {
894 		.override	= ene_override,
895 		.save_state	= ti_save_state,
896 		.restore_state	= ti_restore_state,
897 		.sock_init	= ti_init,
898 	},
899 #endif
900 #ifdef CONFIG_YENTA_RICOH
901 	[CARDBUS_TYPE_RICOH]	= {
902 		.override	= ricoh_override,
903 		.save_state	= ricoh_save_state,
904 		.restore_state	= ricoh_restore_state,
905 	},
906 #endif
907 #ifdef CONFIG_YENTA_TOSHIBA
908 	[CARDBUS_TYPE_TOPIC95]	= {
909 		.override	= topic95_override,
910 	},
911 	[CARDBUS_TYPE_TOPIC97]	= {
912 		.override	= topic97_override,
913 	},
914 #endif
915 #ifdef CONFIG_YENTA_O2
916 	[CARDBUS_TYPE_O2MICRO]	= {
917 		.override	= o2micro_override,
918 		.restore_state	= o2micro_restore_state,
919 	},
920 #endif
921 };
922 
923 
924 static unsigned int yenta_probe_irq(struct yenta_socket *socket, u32 isa_irq_mask)
925 {
926 	int i;
927 	unsigned long val;
928 	u32 mask;
929 	u8 reg;
930 
931 	/*
932 	 * Probe for usable interrupts using the force
933 	 * register to generate bogus card status events.
934 	 */
935 	cb_writel(socket, CB_SOCKET_EVENT, -1);
936 	cb_writel(socket, CB_SOCKET_MASK, CB_CSTSMASK);
937 	reg = exca_readb(socket, I365_CSCINT);
938 	exca_writeb(socket, I365_CSCINT, 0);
939 	val = probe_irq_on() & isa_irq_mask;
940 	for (i = 1; i < 16; i++) {
941 		if (!((val >> i) & 1))
942 			continue;
943 		exca_writeb(socket, I365_CSCINT, I365_CSC_STSCHG | (i << 4));
944 		cb_writel(socket, CB_SOCKET_FORCE, CB_FCARDSTS);
945 		udelay(100);
946 		cb_writel(socket, CB_SOCKET_EVENT, -1);
947 	}
948 	cb_writel(socket, CB_SOCKET_MASK, 0);
949 	exca_writeb(socket, I365_CSCINT, reg);
950 
951 	mask = probe_irq_mask(val) & 0xffff;
952 
953 	return mask;
954 }
955 
956 
957 /*
958  * yenta PCI irq probing.
959  * currently only used in the TI/EnE initialization code
960  */
961 #ifdef CONFIG_YENTA_TI
962 
963 /* interrupt handler, only used during probing */
964 static irqreturn_t yenta_probe_handler(int irq, void *dev_id)
965 {
966 	struct yenta_socket *socket = (struct yenta_socket *) dev_id;
967 	u8 csc;
968 	u32 cb_event;
969 
970 	/* Clear interrupt status for the event */
971 	cb_event = cb_readl(socket, CB_SOCKET_EVENT);
972 	cb_writel(socket, CB_SOCKET_EVENT, -1);
973 	csc = exca_readb(socket, I365_CSC);
974 
975 	if (cb_event || csc) {
976 		socket->probe_status = 1;
977 		return IRQ_HANDLED;
978 	}
979 
980 	return IRQ_NONE;
981 }
982 
983 /* probes the PCI interrupt, use only on override functions */
984 static int yenta_probe_cb_irq(struct yenta_socket *socket)
985 {
986 	u8 reg = 0;
987 
988 	if (!socket->cb_irq)
989 		return -1;
990 
991 	socket->probe_status = 0;
992 
993 	if (request_irq(socket->cb_irq, yenta_probe_handler, IRQF_SHARED, "yenta", socket)) {
994 		dev_warn(&socket->dev->dev,
995 			 "request_irq() in yenta_probe_cb_irq() failed!\n");
996 		return -1;
997 	}
998 
999 	/* generate interrupt, wait */
1000 	if (!socket->dev->irq)
1001 		reg = exca_readb(socket, I365_CSCINT);
1002 	exca_writeb(socket, I365_CSCINT, reg | I365_CSC_STSCHG);
1003 	cb_writel(socket, CB_SOCKET_EVENT, -1);
1004 	cb_writel(socket, CB_SOCKET_MASK, CB_CSTSMASK);
1005 	cb_writel(socket, CB_SOCKET_FORCE, CB_FCARDSTS);
1006 
1007 	msleep(100);
1008 
1009 	/* disable interrupts */
1010 	cb_writel(socket, CB_SOCKET_MASK, 0);
1011 	exca_writeb(socket, I365_CSCINT, reg);
1012 	cb_writel(socket, CB_SOCKET_EVENT, -1);
1013 	exca_readb(socket, I365_CSC);
1014 
1015 	free_irq(socket->cb_irq, socket);
1016 
1017 	return (int) socket->probe_status;
1018 }
1019 
1020 #endif /* CONFIG_YENTA_TI */
1021 
1022 
1023 /*
1024  * Set static data that doesn't need re-initializing..
1025  */
1026 static void yenta_get_socket_capabilities(struct yenta_socket *socket, u32 isa_irq_mask)
1027 {
1028 	socket->socket.pci_irq = socket->cb_irq;
1029 	if (isa_probe)
1030 		socket->socket.irq_mask = yenta_probe_irq(socket, isa_irq_mask);
1031 	else
1032 		socket->socket.irq_mask = 0;
1033 
1034 	dev_info(&socket->dev->dev, "ISA IRQ mask 0x%04x, PCI irq %d\n",
1035 		 socket->socket.irq_mask, socket->cb_irq);
1036 }
1037 
1038 /*
1039  * Initialize the standard cardbus registers
1040  */
1041 static void yenta_config_init(struct yenta_socket *socket)
1042 {
1043 	u16 bridge;
1044 	struct pci_dev *dev = socket->dev;
1045 	struct pci_bus_region region;
1046 
1047 	pcibios_resource_to_bus(socket->dev->bus, &region, &dev->resource[0]);
1048 
1049 	config_writel(socket, CB_LEGACY_MODE_BASE, 0);
1050 	config_writel(socket, PCI_BASE_ADDRESS_0, region.start);
1051 	config_writew(socket, PCI_COMMAND,
1052 			PCI_COMMAND_IO |
1053 			PCI_COMMAND_MEMORY |
1054 			PCI_COMMAND_MASTER |
1055 			PCI_COMMAND_WAIT);
1056 
1057 	/* MAGIC NUMBERS! Fixme */
1058 	config_writeb(socket, PCI_CACHE_LINE_SIZE, L1_CACHE_BYTES / 4);
1059 	config_writeb(socket, PCI_LATENCY_TIMER, 168);
1060 	config_writel(socket, PCI_PRIMARY_BUS,
1061 		(176 << 24) |			   /* sec. latency timer */
1062 		((unsigned int)dev->subordinate->busn_res.end << 16) | /* subordinate bus */
1063 		((unsigned int)dev->subordinate->busn_res.start << 8) |  /* secondary bus */
1064 		dev->subordinate->primary);		   /* primary bus */
1065 
1066 	/*
1067 	 * Set up the bridging state:
1068 	 *  - enable write posting.
1069 	 *  - memory window 0 prefetchable, window 1 non-prefetchable
1070 	 *  - PCI interrupts enabled if a PCI interrupt exists..
1071 	 */
1072 	bridge = config_readw(socket, CB_BRIDGE_CONTROL);
1073 	bridge &= ~(CB_BRIDGE_CRST | CB_BRIDGE_PREFETCH1 | CB_BRIDGE_ISAEN | CB_BRIDGE_VGAEN);
1074 	bridge |= CB_BRIDGE_PREFETCH0 | CB_BRIDGE_POSTEN;
1075 	config_writew(socket, CB_BRIDGE_CONTROL, bridge);
1076 }
1077 
1078 /**
1079  * yenta_fixup_parent_bridge - Fix subordinate bus# of the parent bridge
1080  * @cardbus_bridge: The PCI bus which the CardBus bridge bridges to
1081  *
1082  * Checks if devices on the bus which the CardBus bridge bridges to would be
1083  * invisible during PCI scans because of a misconfigured subordinate number
1084  * of the parent brige - some BIOSes seem to be too lazy to set it right.
1085  * Does the fixup carefully by checking how far it can go without conflicts.
1086  * See http://bugzilla.kernel.org/show_bug.cgi?id=2944 for more information.
1087  */
1088 static void yenta_fixup_parent_bridge(struct pci_bus *cardbus_bridge)
1089 {
1090 	struct pci_bus *sibling;
1091 	unsigned char upper_limit;
1092 	/*
1093 	 * We only check and fix the parent bridge: All systems which need
1094 	 * this fixup that have been reviewed are laptops and the only bridge
1095 	 * which needed fixing was the parent bridge of the CardBus bridge:
1096 	 */
1097 	struct pci_bus *bridge_to_fix = cardbus_bridge->parent;
1098 
1099 	/* Check bus numbers are already set up correctly: */
1100 	if (bridge_to_fix->busn_res.end >= cardbus_bridge->busn_res.end)
1101 		return; /* The subordinate number is ok, nothing to do */
1102 
1103 	if (!bridge_to_fix->parent)
1104 		return; /* Root bridges are ok */
1105 
1106 	/* stay within the limits of the bus range of the parent: */
1107 	upper_limit = bridge_to_fix->parent->busn_res.end;
1108 
1109 	/* check the bus ranges of all sibling bridges to prevent overlap */
1110 	list_for_each_entry(sibling, &bridge_to_fix->parent->children,
1111 			node) {
1112 		/*
1113 		 * If the sibling has a higher secondary bus number
1114 		 * and it's secondary is equal or smaller than our
1115 		 * current upper limit, set the new upper limit to
1116 		 * the bus number below the sibling's range:
1117 		 */
1118 		if (sibling->busn_res.start > bridge_to_fix->busn_res.end
1119 		    && sibling->busn_res.start <= upper_limit)
1120 			upper_limit = sibling->busn_res.start - 1;
1121 	}
1122 
1123 	/* Show that the wanted subordinate number is not possible: */
1124 	if (cardbus_bridge->busn_res.end > upper_limit)
1125 		dev_warn(&cardbus_bridge->dev,
1126 			 "Upper limit for fixing this bridge's parent bridge: #%02x\n",
1127 			 upper_limit);
1128 
1129 	/* If we have room to increase the bridge's subordinate number, */
1130 	if (bridge_to_fix->busn_res.end < upper_limit) {
1131 
1132 		/* use the highest number of the hidden bus, within limits */
1133 		unsigned char subordinate_to_assign =
1134 			min_t(int, cardbus_bridge->busn_res.end, upper_limit);
1135 
1136 		dev_info(&bridge_to_fix->dev,
1137 			 "Raising subordinate bus# of parent bus (#%02x) from #%02x to #%02x\n",
1138 			 bridge_to_fix->number,
1139 			 (int)bridge_to_fix->busn_res.end,
1140 			 subordinate_to_assign);
1141 
1142 		/* Save the new subordinate in the bus struct of the bridge */
1143 		bridge_to_fix->busn_res.end = subordinate_to_assign;
1144 
1145 		/* and update the PCI config space with the new subordinate */
1146 		pci_write_config_byte(bridge_to_fix->self,
1147 			PCI_SUBORDINATE_BUS, bridge_to_fix->busn_res.end);
1148 	}
1149 }
1150 
1151 /*
1152  * Initialize a cardbus controller. Make sure we have a usable
1153  * interrupt, and that we can map the cardbus area. Fill in the
1154  * socket information structure..
1155  */
1156 static int yenta_probe(struct pci_dev *dev, const struct pci_device_id *id)
1157 {
1158 	struct yenta_socket *socket;
1159 	int ret;
1160 
1161 	/*
1162 	 * If we failed to assign proper bus numbers for this cardbus
1163 	 * controller during PCI probe, its subordinate pci_bus is NULL.
1164 	 * Bail out if so.
1165 	 */
1166 	if (!dev->subordinate) {
1167 		dev_err(&dev->dev, "no bus associated! (try 'pci=assign-busses')\n");
1168 		return -ENODEV;
1169 	}
1170 
1171 	socket = kzalloc(sizeof(struct yenta_socket), GFP_KERNEL);
1172 	if (!socket)
1173 		return -ENOMEM;
1174 
1175 	/* prepare pcmcia_socket */
1176 	socket->socket.ops = &yenta_socket_operations;
1177 	socket->socket.resource_ops = &pccard_nonstatic_ops;
1178 	socket->socket.dev.parent = &dev->dev;
1179 	socket->socket.driver_data = socket;
1180 	socket->socket.owner = THIS_MODULE;
1181 	socket->socket.features = SS_CAP_PAGE_REGS | SS_CAP_PCCARD;
1182 	socket->socket.map_size = 0x1000;
1183 	socket->socket.cb_dev = dev;
1184 
1185 	/* prepare struct yenta_socket */
1186 	socket->dev = dev;
1187 	pci_set_drvdata(dev, socket);
1188 
1189 	/*
1190 	 * Do some basic sanity checking..
1191 	 */
1192 	if (pci_enable_device(dev)) {
1193 		ret = -EBUSY;
1194 		goto free;
1195 	}
1196 
1197 	ret = pci_request_regions(dev, "yenta_socket");
1198 	if (ret)
1199 		goto disable;
1200 
1201 	if (!pci_resource_start(dev, 0)) {
1202 		dev_err(&dev->dev, "No cardbus resource!\n");
1203 		ret = -ENODEV;
1204 		goto release;
1205 	}
1206 
1207 	/*
1208 	 * Ok, start setup.. Map the cardbus registers,
1209 	 * and request the IRQ.
1210 	 */
1211 	socket->base = ioremap(pci_resource_start(dev, 0), 0x1000);
1212 	if (!socket->base) {
1213 		ret = -ENOMEM;
1214 		goto release;
1215 	}
1216 
1217 	/*
1218 	 * report the subsystem vendor and device for help debugging
1219 	 * the irq stuff...
1220 	 */
1221 	dev_info(&dev->dev, "CardBus bridge found [%04x:%04x]\n",
1222 		 dev->subsystem_vendor, dev->subsystem_device);
1223 
1224 	yenta_config_init(socket);
1225 
1226 	/* Disable all events */
1227 	cb_writel(socket, CB_SOCKET_MASK, 0x0);
1228 
1229 	/* Set up the bridge regions.. */
1230 	yenta_allocate_resources(socket);
1231 
1232 	socket->cb_irq = dev->irq;
1233 
1234 	/* Do we have special options for the device? */
1235 	if (id->driver_data != CARDBUS_TYPE_DEFAULT &&
1236 	    id->driver_data < ARRAY_SIZE(cardbus_type)) {
1237 		socket->type = &cardbus_type[id->driver_data];
1238 
1239 		ret = socket->type->override(socket);
1240 		if (ret < 0)
1241 			goto unmap;
1242 	}
1243 
1244 	/* We must finish initialization here */
1245 
1246 	if (!socket->cb_irq || request_irq(socket->cb_irq, yenta_interrupt, IRQF_SHARED, "yenta", socket)) {
1247 		/* No IRQ or request_irq failed. Poll */
1248 		socket->cb_irq = 0; /* But zero is a valid IRQ number. */
1249 		timer_setup(&socket->poll_timer, yenta_interrupt_wrapper, 0);
1250 		mod_timer(&socket->poll_timer, jiffies + HZ);
1251 		dev_info(&dev->dev,
1252 			 "no PCI IRQ, CardBus support disabled for this socket.\n");
1253 		dev_info(&dev->dev,
1254 			 "check your BIOS CardBus, BIOS IRQ or ACPI settings.\n");
1255 	} else {
1256 		socket->socket.features |= SS_CAP_CARDBUS;
1257 	}
1258 
1259 	/* Figure out what the dang thing can do for the PCMCIA layer... */
1260 	yenta_interrogate(socket);
1261 	yenta_get_socket_capabilities(socket, isa_interrupts);
1262 	dev_info(&dev->dev, "Socket status: %08x\n",
1263 		 cb_readl(socket, CB_SOCKET_STATE));
1264 
1265 	yenta_fixup_parent_bridge(dev->subordinate);
1266 
1267 	/* Register it with the pcmcia layer.. */
1268 	ret = pcmcia_register_socket(&socket->socket);
1269 	if (ret)
1270 		goto free_irq;
1271 
1272 	/* Add the yenta register attributes */
1273 	ret = device_create_file(&dev->dev, &dev_attr_yenta_registers);
1274 	if (ret)
1275 		goto unregister_socket;
1276 
1277 	return ret;
1278 
1279 	/* error path... */
1280  unregister_socket:
1281 	pcmcia_unregister_socket(&socket->socket);
1282  free_irq:
1283 	if (socket->cb_irq)
1284 		free_irq(socket->cb_irq, socket);
1285 	else
1286 		del_timer_sync(&socket->poll_timer);
1287  unmap:
1288 	iounmap(socket->base);
1289 	yenta_free_resources(socket);
1290  release:
1291 	pci_release_regions(dev);
1292  disable:
1293 	pci_disable_device(dev);
1294  free:
1295 	pci_set_drvdata(dev, NULL);
1296 	kfree(socket);
1297 	return ret;
1298 }
1299 
1300 #ifdef CONFIG_PM
1301 static int yenta_dev_suspend_noirq(struct device *dev)
1302 {
1303 	struct pci_dev *pdev = to_pci_dev(dev);
1304 	struct yenta_socket *socket = pci_get_drvdata(pdev);
1305 
1306 	if (!socket)
1307 		return 0;
1308 
1309 	if (socket->type && socket->type->save_state)
1310 		socket->type->save_state(socket);
1311 
1312 	pci_save_state(pdev);
1313 	pci_read_config_dword(pdev, 16*4, &socket->saved_state[0]);
1314 	pci_read_config_dword(pdev, 17*4, &socket->saved_state[1]);
1315 	pci_disable_device(pdev);
1316 
1317 	return 0;
1318 }
1319 
1320 static int yenta_dev_resume_noirq(struct device *dev)
1321 {
1322 	struct pci_dev *pdev = to_pci_dev(dev);
1323 	struct yenta_socket *socket = pci_get_drvdata(pdev);
1324 	int ret;
1325 
1326 	if (!socket)
1327 		return 0;
1328 
1329 	pci_write_config_dword(pdev, 16*4, socket->saved_state[0]);
1330 	pci_write_config_dword(pdev, 17*4, socket->saved_state[1]);
1331 
1332 	ret = pci_enable_device(pdev);
1333 	if (ret)
1334 		return ret;
1335 
1336 	pci_set_master(pdev);
1337 
1338 	if (socket->type && socket->type->restore_state)
1339 		socket->type->restore_state(socket);
1340 
1341 	return 0;
1342 }
1343 
1344 static const struct dev_pm_ops yenta_pm_ops = {
1345 	.suspend_noirq = yenta_dev_suspend_noirq,
1346 	.resume_noirq = yenta_dev_resume_noirq,
1347 	.freeze_noirq = yenta_dev_suspend_noirq,
1348 	.thaw_noirq = yenta_dev_resume_noirq,
1349 	.poweroff_noirq = yenta_dev_suspend_noirq,
1350 	.restore_noirq = yenta_dev_resume_noirq,
1351 };
1352 
1353 #define YENTA_PM_OPS	(&yenta_pm_ops)
1354 #else
1355 #define YENTA_PM_OPS	NULL
1356 #endif
1357 
1358 #define CB_ID(vend, dev, type)				\
1359 	{						\
1360 		.vendor		= vend,			\
1361 		.device		= dev,			\
1362 		.subvendor	= PCI_ANY_ID,		\
1363 		.subdevice	= PCI_ANY_ID,		\
1364 		.class		= PCI_CLASS_BRIDGE_CARDBUS << 8, \
1365 		.class_mask	= ~0,			\
1366 		.driver_data	= CARDBUS_TYPE_##type,	\
1367 	}
1368 
1369 static const struct pci_device_id yenta_table[] = {
1370 	CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_1031, TI),
1371 
1372 	/*
1373 	 * TBD: Check if these TI variants can use more
1374 	 * advanced overrides instead.  (I can't get the
1375 	 * data sheets for these devices. --rmk)
1376 	 */
1377 #ifdef CONFIG_YENTA_TI
1378 	CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_1210, TI),
1379 
1380 	CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_1130, TI113X),
1381 	CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_1131, TI113X),
1382 
1383 	CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_1211, TI12XX),
1384 	CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_1220, TI12XX),
1385 	CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_1221, TI12XX),
1386 	CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_1225, TI12XX),
1387 	CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_1251A, TI12XX),
1388 	CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_1251B, TI12XX),
1389 	CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_1420, TI12XX),
1390 	CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_1450, TI12XX),
1391 	CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_1451A, TI12XX),
1392 	CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_1510, TI12XX),
1393 	CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_1520, TI12XX),
1394 	CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_1620, TI12XX),
1395 	CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_4410, TI12XX),
1396 	CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_4450, TI12XX),
1397 	CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_4451, TI12XX),
1398 	CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_4510, TI12XX),
1399 	CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_4520, TI12XX),
1400 
1401 	CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_1250, TI1250),
1402 	CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_1410, TI1250),
1403 
1404 	CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_XX21_XX11, TI12XX),
1405 	CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_X515, TI12XX),
1406 	CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_XX12, TI12XX),
1407 	CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_X420, TI12XX),
1408 	CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_X620, TI12XX),
1409 	CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_7410, TI12XX),
1410 	CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_7510, TI12XX),
1411 	CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_7610, TI12XX),
1412 
1413 	CB_ID(PCI_VENDOR_ID_ENE, PCI_DEVICE_ID_ENE_710, ENE),
1414 	CB_ID(PCI_VENDOR_ID_ENE, PCI_DEVICE_ID_ENE_712, ENE),
1415 	CB_ID(PCI_VENDOR_ID_ENE, PCI_DEVICE_ID_ENE_720, ENE),
1416 	CB_ID(PCI_VENDOR_ID_ENE, PCI_DEVICE_ID_ENE_722, ENE),
1417 	CB_ID(PCI_VENDOR_ID_ENE, PCI_DEVICE_ID_ENE_1211, ENE),
1418 	CB_ID(PCI_VENDOR_ID_ENE, PCI_DEVICE_ID_ENE_1225, ENE),
1419 	CB_ID(PCI_VENDOR_ID_ENE, PCI_DEVICE_ID_ENE_1410, ENE),
1420 	CB_ID(PCI_VENDOR_ID_ENE, PCI_DEVICE_ID_ENE_1420, ENE),
1421 #endif /* CONFIG_YENTA_TI */
1422 
1423 #ifdef CONFIG_YENTA_RICOH
1424 	CB_ID(PCI_VENDOR_ID_RICOH, PCI_DEVICE_ID_RICOH_RL5C465, RICOH),
1425 	CB_ID(PCI_VENDOR_ID_RICOH, PCI_DEVICE_ID_RICOH_RL5C466, RICOH),
1426 	CB_ID(PCI_VENDOR_ID_RICOH, PCI_DEVICE_ID_RICOH_RL5C475, RICOH),
1427 	CB_ID(PCI_VENDOR_ID_RICOH, PCI_DEVICE_ID_RICOH_RL5C476, RICOH),
1428 	CB_ID(PCI_VENDOR_ID_RICOH, PCI_DEVICE_ID_RICOH_RL5C478, RICOH),
1429 #endif
1430 
1431 #ifdef CONFIG_YENTA_TOSHIBA
1432 	CB_ID(PCI_VENDOR_ID_TOSHIBA, PCI_DEVICE_ID_TOSHIBA_TOPIC95, TOPIC95),
1433 	CB_ID(PCI_VENDOR_ID_TOSHIBA, PCI_DEVICE_ID_TOSHIBA_TOPIC97, TOPIC97),
1434 	CB_ID(PCI_VENDOR_ID_TOSHIBA, PCI_DEVICE_ID_TOSHIBA_TOPIC100, TOPIC97),
1435 #endif
1436 
1437 #ifdef CONFIG_YENTA_O2
1438 	CB_ID(PCI_VENDOR_ID_O2, PCI_ANY_ID, O2MICRO),
1439 #endif
1440 
1441 	/* match any cardbus bridge */
1442 	CB_ID(PCI_ANY_ID, PCI_ANY_ID, DEFAULT),
1443 	{ /* all zeroes */ }
1444 };
1445 MODULE_DEVICE_TABLE(pci, yenta_table);
1446 
1447 
1448 static struct pci_driver yenta_cardbus_driver = {
1449 	.name		= "yenta_cardbus",
1450 	.id_table	= yenta_table,
1451 	.probe		= yenta_probe,
1452 	.remove		= yenta_close,
1453 	.driver.pm	= YENTA_PM_OPS,
1454 };
1455 
1456 module_pci_driver(yenta_cardbus_driver);
1457 
1458 MODULE_LICENSE("GPL");
1459