xref: /openbmc/linux/drivers/mtd/maps/pcmciamtd.c (revision b6dcefde)
1 /*
2  * pcmciamtd.c - MTD driver for PCMCIA flash memory cards
3  *
4  * Author: Simon Evans <spse@secret.org.uk>
5  *
6  * Copyright (C) 2002 Simon Evans
7  *
8  * Licence: GPL
9  *
10  */
11 
12 #include <linux/module.h>
13 #include <linux/slab.h>
14 #include <linux/timer.h>
15 #include <linux/init.h>
16 #include <asm/io.h>
17 #include <asm/system.h>
18 
19 #include <pcmcia/cs_types.h>
20 #include <pcmcia/cs.h>
21 #include <pcmcia/cistpl.h>
22 #include <pcmcia/ds.h>
23 
24 #include <linux/mtd/map.h>
25 #include <linux/mtd/mtd.h>
26 
27 #ifdef CONFIG_MTD_DEBUG
28 static int debug = CONFIG_MTD_DEBUG_VERBOSE;
29 module_param(debug, int, 0);
30 MODULE_PARM_DESC(debug, "Set Debug Level 0=quiet, 5=noisy");
31 #undef DEBUG
32 #define DEBUG(n, format, arg...) \
33 	if (n <= debug) {	 \
34 		printk(KERN_DEBUG __FILE__ ":%s(): " format "\n", __func__ , ## arg); \
35 	}
36 
37 #else
38 #undef DEBUG
39 #define DEBUG(n, arg...)
40 static const int debug = 0;
41 #endif
42 
43 #define err(format, arg...) printk(KERN_ERR "pcmciamtd: " format "\n" , ## arg)
44 #define info(format, arg...) printk(KERN_INFO "pcmciamtd: " format "\n" , ## arg)
45 #define warn(format, arg...) printk(KERN_WARNING "pcmciamtd: " format "\n" , ## arg)
46 
47 
48 #define DRIVER_DESC	"PCMCIA Flash memory card driver"
49 
50 /* Size of the PCMCIA address space: 26 bits = 64 MB */
51 #define MAX_PCMCIA_ADDR	0x4000000
52 
53 struct pcmciamtd_dev {
54 	struct pcmcia_device	*p_dev;
55 	dev_node_t	node;		/* device node */
56 	caddr_t		win_base;	/* ioremapped address of PCMCIA window */
57 	unsigned int	win_size;	/* size of window */
58 	unsigned int	offset;		/* offset into card the window currently points at */
59 	struct map_info	pcmcia_map;
60 	struct mtd_info	*mtd_info;
61 	int		vpp;
62 	char		mtd_name[sizeof(struct cistpl_vers_1_t)];
63 };
64 
65 
66 /* Module parameters */
67 
68 /* 2 = do 16-bit transfers, 1 = do 8-bit transfers */
69 static int bankwidth = 2;
70 
71 /* Speed of memory accesses, in ns */
72 static int mem_speed;
73 
74 /* Force the size of an SRAM card */
75 static int force_size;
76 
77 /* Force Vpp */
78 static int vpp;
79 
80 /* Set Vpp */
81 static int setvpp;
82 
83 /* Force card to be treated as FLASH, ROM or RAM */
84 static int mem_type;
85 
86 MODULE_LICENSE("GPL");
87 MODULE_AUTHOR("Simon Evans <spse@secret.org.uk>");
88 MODULE_DESCRIPTION(DRIVER_DESC);
89 module_param(bankwidth, int, 0);
90 MODULE_PARM_DESC(bankwidth, "Set bankwidth (1=8 bit, 2=16 bit, default=2)");
91 module_param(mem_speed, int, 0);
92 MODULE_PARM_DESC(mem_speed, "Set memory access speed in ns");
93 module_param(force_size, int, 0);
94 MODULE_PARM_DESC(force_size, "Force size of card in MiB (1-64)");
95 module_param(setvpp, int, 0);
96 MODULE_PARM_DESC(setvpp, "Set Vpp (0=Never, 1=On writes, 2=Always on, default=0)");
97 module_param(vpp, int, 0);
98 MODULE_PARM_DESC(vpp, "Vpp value in 1/10ths eg 33=3.3V 120=12V (Dangerous)");
99 module_param(mem_type, int, 0);
100 MODULE_PARM_DESC(mem_type, "Set Memory type (0=Flash, 1=RAM, 2=ROM, default=0)");
101 
102 
103 /* read/write{8,16} copy_{from,to} routines with window remapping to access whole card */
104 static caddr_t remap_window(struct map_info *map, unsigned long to)
105 {
106 	struct pcmciamtd_dev *dev = (struct pcmciamtd_dev *)map->map_priv_1;
107 	window_handle_t win = (window_handle_t)map->map_priv_2;
108 	memreq_t mrq;
109 	int ret;
110 
111 	if (!pcmcia_dev_present(dev->p_dev)) {
112 		DEBUG(1, "device removed");
113 		return 0;
114 	}
115 
116 	mrq.CardOffset = to & ~(dev->win_size-1);
117 	if(mrq.CardOffset != dev->offset) {
118 		DEBUG(2, "Remapping window from 0x%8.8x to 0x%8.8x",
119 		      dev->offset, mrq.CardOffset);
120 		mrq.Page = 0;
121 		ret = pcmcia_map_mem_page(dev->p_dev, win, &mrq);
122 		if (ret != 0)
123 			return NULL;
124 		dev->offset = mrq.CardOffset;
125 	}
126 	return dev->win_base + (to & (dev->win_size-1));
127 }
128 
129 
130 static map_word pcmcia_read8_remap(struct map_info *map, unsigned long ofs)
131 {
132 	caddr_t addr;
133 	map_word d = {{0}};
134 
135 	addr = remap_window(map, ofs);
136 	if(!addr)
137 		return d;
138 
139 	d.x[0] = readb(addr);
140 	DEBUG(3, "ofs = 0x%08lx (%p) data = 0x%02x", ofs, addr, d.x[0]);
141 	return d;
142 }
143 
144 
145 static map_word pcmcia_read16_remap(struct map_info *map, unsigned long ofs)
146 {
147 	caddr_t addr;
148 	map_word d = {{0}};
149 
150 	addr = remap_window(map, ofs);
151 	if(!addr)
152 		return d;
153 
154 	d.x[0] = readw(addr);
155 	DEBUG(3, "ofs = 0x%08lx (%p) data = 0x%04x", ofs, addr, d.x[0]);
156 	return d;
157 }
158 
159 
160 static void pcmcia_copy_from_remap(struct map_info *map, void *to, unsigned long from, ssize_t len)
161 {
162 	struct pcmciamtd_dev *dev = (struct pcmciamtd_dev *)map->map_priv_1;
163 	unsigned long win_size = dev->win_size;
164 
165 	DEBUG(3, "to = %p from = %lu len = %u", to, from, len);
166 	while(len) {
167 		int toread = win_size - (from & (win_size-1));
168 		caddr_t addr;
169 
170 		if(toread > len)
171 			toread = len;
172 
173 		addr = remap_window(map, from);
174 		if(!addr)
175 			return;
176 
177 		DEBUG(4, "memcpy from %p to %p len = %d", addr, to, toread);
178 		memcpy_fromio(to, addr, toread);
179 		len -= toread;
180 		to += toread;
181 		from += toread;
182 	}
183 }
184 
185 
186 static void pcmcia_write8_remap(struct map_info *map, map_word d, unsigned long adr)
187 {
188 	caddr_t addr = remap_window(map, adr);
189 
190 	if(!addr)
191 		return;
192 
193 	DEBUG(3, "adr = 0x%08lx (%p)  data = 0x%02x", adr, addr, d.x[0]);
194 	writeb(d.x[0], addr);
195 }
196 
197 
198 static void pcmcia_write16_remap(struct map_info *map, map_word d, unsigned long adr)
199 {
200 	caddr_t addr = remap_window(map, adr);
201 	if(!addr)
202 		return;
203 
204 	DEBUG(3, "adr = 0x%08lx (%p)  data = 0x%04x", adr, addr, d.x[0]);
205 	writew(d.x[0], addr);
206 }
207 
208 
209 static void pcmcia_copy_to_remap(struct map_info *map, unsigned long to, const void *from, ssize_t len)
210 {
211 	struct pcmciamtd_dev *dev = (struct pcmciamtd_dev *)map->map_priv_1;
212 	unsigned long win_size = dev->win_size;
213 
214 	DEBUG(3, "to = %lu from = %p len = %u", to, from, len);
215 	while(len) {
216 		int towrite = win_size - (to & (win_size-1));
217 		caddr_t addr;
218 
219 		if(towrite > len)
220 			towrite = len;
221 
222 		addr = remap_window(map, to);
223 		if(!addr)
224 			return;
225 
226 		DEBUG(4, "memcpy from %p to %p len = %d", from, addr, towrite);
227 		memcpy_toio(addr, from, towrite);
228 		len -= towrite;
229 		to += towrite;
230 		from += towrite;
231 	}
232 }
233 
234 
235 /* read/write{8,16} copy_{from,to} routines with direct access */
236 
237 #define DEV_REMOVED(x)  (!(pcmcia_dev_present(((struct pcmciamtd_dev *)map->map_priv_1)->p_dev)))
238 
239 static map_word pcmcia_read8(struct map_info *map, unsigned long ofs)
240 {
241 	caddr_t win_base = (caddr_t)map->map_priv_2;
242 	map_word d = {{0}};
243 
244 	if(DEV_REMOVED(map))
245 		return d;
246 
247 	d.x[0] = readb(win_base + ofs);
248 	DEBUG(3, "ofs = 0x%08lx (%p) data = 0x%02x", ofs, win_base + ofs, d.x[0]);
249 	return d;
250 }
251 
252 
253 static map_word pcmcia_read16(struct map_info *map, unsigned long ofs)
254 {
255 	caddr_t win_base = (caddr_t)map->map_priv_2;
256 	map_word d = {{0}};
257 
258 	if(DEV_REMOVED(map))
259 		return d;
260 
261 	d.x[0] = readw(win_base + ofs);
262 	DEBUG(3, "ofs = 0x%08lx (%p) data = 0x%04x", ofs, win_base + ofs, d.x[0]);
263 	return d;
264 }
265 
266 
267 static void pcmcia_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
268 {
269 	caddr_t win_base = (caddr_t)map->map_priv_2;
270 
271 	if(DEV_REMOVED(map))
272 		return;
273 
274 	DEBUG(3, "to = %p from = %lu len = %u", to, from, len);
275 	memcpy_fromio(to, win_base + from, len);
276 }
277 
278 
279 static void pcmcia_write8(struct map_info *map, u8 d, unsigned long adr)
280 {
281 	caddr_t win_base = (caddr_t)map->map_priv_2;
282 
283 	if(DEV_REMOVED(map))
284 		return;
285 
286 	DEBUG(3, "adr = 0x%08lx (%p)  data = 0x%02x", adr, win_base + adr, d);
287 	writeb(d, win_base + adr);
288 }
289 
290 
291 static void pcmcia_write16(struct map_info *map, u16 d, unsigned long adr)
292 {
293 	caddr_t win_base = (caddr_t)map->map_priv_2;
294 
295 	if(DEV_REMOVED(map))
296 		return;
297 
298 	DEBUG(3, "adr = 0x%08lx (%p)  data = 0x%04x", adr, win_base + adr, d);
299 	writew(d, win_base + adr);
300 }
301 
302 
303 static void pcmcia_copy_to(struct map_info *map, unsigned long to, const void *from, ssize_t len)
304 {
305 	caddr_t win_base = (caddr_t)map->map_priv_2;
306 
307 	if(DEV_REMOVED(map))
308 		return;
309 
310 	DEBUG(3, "to = %lu from = %p len = %u", to, from, len);
311 	memcpy_toio(win_base + to, from, len);
312 }
313 
314 
315 static void pcmciamtd_set_vpp(struct map_info *map, int on)
316 {
317 	struct pcmciamtd_dev *dev = (struct pcmciamtd_dev *)map->map_priv_1;
318 	struct pcmcia_device *link = dev->p_dev;
319 	modconf_t mod;
320 	int ret;
321 
322 	mod.Attributes = CONF_VPP1_CHANGE_VALID | CONF_VPP2_CHANGE_VALID;
323 	mod.Vcc = 0;
324 	mod.Vpp1 = mod.Vpp2 = on ? dev->vpp : 0;
325 
326 	DEBUG(2, "dev = %p on = %d vpp = %d\n", dev, on, dev->vpp);
327 	ret = pcmcia_modify_configuration(link, &mod);
328 }
329 
330 
331 /* After a card is removed, pcmciamtd_release() will unregister the
332  * device, and release the PCMCIA configuration.  If the device is
333  * still open, this will be postponed until it is closed.
334  */
335 
336 static void pcmciamtd_release(struct pcmcia_device *link)
337 {
338 	struct pcmciamtd_dev *dev = link->priv;
339 
340 	DEBUG(3, "link = 0x%p", link);
341 
342 	if (link->win) {
343 		if(dev->win_base) {
344 			iounmap(dev->win_base);
345 			dev->win_base = NULL;
346 		}
347 		pcmcia_release_window(link, link->win);
348 	}
349 	pcmcia_disable_device(link);
350 }
351 
352 
353 #ifdef CONFIG_MTD_DEBUG
354 static int pcmciamtd_cistpl_format(struct pcmcia_device *p_dev,
355 				tuple_t *tuple,
356 				void *priv_data)
357 {
358 	cisparse_t parse;
359 
360 	if (!pcmcia_parse_tuple(tuple, &parse)) {
361 		cistpl_format_t *t = &parse.format;
362 		(void)t; /* Shut up, gcc */
363 		DEBUG(2, "Format type: %u, Error Detection: %u, offset = %u, length =%u",
364 			t->type, t->edc, t->offset, t->length);
365 	}
366 	return -ENOSPC;
367 }
368 
369 static int pcmciamtd_cistpl_jedec(struct pcmcia_device *p_dev,
370 				tuple_t *tuple,
371 				void *priv_data)
372 {
373 	cisparse_t parse;
374 	int i;
375 
376 	if (!pcmcia_parse_tuple(tuple, &parse)) {
377 		cistpl_jedec_t *t = &parse.jedec;
378 		for (i = 0; i < t->nid; i++)
379 			DEBUG(2, "JEDEC: 0x%02x 0x%02x", t->id[i].mfr, t->id[i].info);
380 	}
381 	return -ENOSPC;
382 }
383 #endif
384 
385 static int pcmciamtd_cistpl_device(struct pcmcia_device *p_dev,
386 				tuple_t *tuple,
387 				void *priv_data)
388 {
389 	struct pcmciamtd_dev *dev = priv_data;
390 	cisparse_t parse;
391 	cistpl_device_t *t = &parse.device;
392 	int i;
393 
394 	if (pcmcia_parse_tuple(tuple, &parse))
395 		return -EINVAL;
396 
397 	DEBUG(2, "Common memory:");
398 	dev->pcmcia_map.size = t->dev[0].size;
399 	/* from here on: DEBUG only */
400 	for (i = 0; i < t->ndev; i++) {
401 		DEBUG(2, "Region %d, type = %u", i, t->dev[i].type);
402 		DEBUG(2, "Region %d, wp = %u", i, t->dev[i].wp);
403 		DEBUG(2, "Region %d, speed = %u ns", i, t->dev[i].speed);
404 		DEBUG(2, "Region %d, size = %u bytes", i, t->dev[i].size);
405 	}
406 	return 0;
407 }
408 
409 static int pcmciamtd_cistpl_geo(struct pcmcia_device *p_dev,
410 				tuple_t *tuple,
411 				void *priv_data)
412 {
413 	struct pcmciamtd_dev *dev = priv_data;
414 	cisparse_t parse;
415 	cistpl_device_geo_t *t = &parse.device_geo;
416 	int i;
417 
418 	if (pcmcia_parse_tuple(tuple, &parse))
419 		return -EINVAL;
420 
421 	dev->pcmcia_map.bankwidth = t->geo[0].buswidth;
422 	/* from here on: DEBUG only */
423 	for (i = 0; i < t->ngeo; i++) {
424 		DEBUG(2, "region: %d bankwidth = %u", i, t->geo[i].buswidth);
425 		DEBUG(2, "region: %d erase_block = %u", i, t->geo[i].erase_block);
426 		DEBUG(2, "region: %d read_block = %u", i, t->geo[i].read_block);
427 		DEBUG(2, "region: %d write_block = %u", i, t->geo[i].write_block);
428 		DEBUG(2, "region: %d partition = %u", i, t->geo[i].partition);
429 		DEBUG(2, "region: %d interleave = %u", i, t->geo[i].interleave);
430 	}
431 	return 0;
432 }
433 
434 
435 static void card_settings(struct pcmciamtd_dev *dev, struct pcmcia_device *link, int *new_name)
436 {
437 	int i;
438 
439 	if (p_dev->prod_id[0]) {
440 		dev->mtd_name[0] = '\0';
441 		for (i = 0; i < 4; i++) {
442 			if (i)
443 				strcat(dev->mtd_name, " ");
444 			if (p_dev->prod_id[i])
445 				strcat(dev->mtd_name, p_dev->prod_id[i]);
446 		}
447 		DEBUG(2, "Found name: %s", dev->mtd_name);
448 	}
449 
450 #ifdef CONFIG_MTD_DEBUG
451 	pcmcia_loop_tuple(p_dev, CISTPL_FORMAT, pcmciamtd_cistpl_format, NULL);
452 	pcmcia_loop_tuple(p_dev, CISTPL_JEDEC_C, pcmciamtd_cistpl_jedec, NULL);
453 #endif
454 	pcmcia_loop_tuple(p_dev, CISTPL_DEVICE, pcmciamtd_cistpl_device, dev);
455 	pcmcia_loop_tuple(p_dev, CISTPL_DEVICE_GEO, pcmciamtd_cistpl_geo, dev);
456 
457 	if(!dev->pcmcia_map.size)
458 		dev->pcmcia_map.size = MAX_PCMCIA_ADDR;
459 
460 	if(!dev->pcmcia_map.bankwidth)
461 		dev->pcmcia_map.bankwidth = 2;
462 
463 	if(force_size) {
464 		dev->pcmcia_map.size = force_size << 20;
465 		DEBUG(2, "size forced to %dM", force_size);
466 	}
467 
468 	if(bankwidth) {
469 		dev->pcmcia_map.bankwidth = bankwidth;
470 		DEBUG(2, "bankwidth forced to %d", bankwidth);
471 	}
472 
473 	dev->pcmcia_map.name = dev->mtd_name;
474 	if(!dev->mtd_name[0]) {
475 		strcpy(dev->mtd_name, "PCMCIA Memory card");
476 		*new_name = 1;
477 	}
478 
479 	DEBUG(1, "Device: Size: %lu Width:%d Name: %s",
480 	      dev->pcmcia_map.size, dev->pcmcia_map.bankwidth << 3, dev->mtd_name);
481 }
482 
483 
484 /* pcmciamtd_config() is scheduled to run after a CARD_INSERTION event
485  * is received, to configure the PCMCIA socket, and to make the
486  * MTD device available to the system.
487  */
488 
489 static int pcmciamtd_config(struct pcmcia_device *link)
490 {
491 	struct pcmciamtd_dev *dev = link->priv;
492 	struct mtd_info *mtd = NULL;
493 	cs_status_t status;
494 	win_req_t req;
495 	int ret;
496 	int i;
497 	static char *probes[] = { "jedec_probe", "cfi_probe" };
498 	int new_name = 0;
499 
500 	DEBUG(3, "link=0x%p", link);
501 
502 	card_settings(dev, link, &new_name);
503 
504 	dev->pcmcia_map.phys = NO_XIP;
505 	dev->pcmcia_map.copy_from = pcmcia_copy_from_remap;
506 	dev->pcmcia_map.copy_to = pcmcia_copy_to_remap;
507 	if (dev->pcmcia_map.bankwidth == 1) {
508 		dev->pcmcia_map.read = pcmcia_read8_remap;
509 		dev->pcmcia_map.write = pcmcia_write8_remap;
510 	} else {
511 		dev->pcmcia_map.read = pcmcia_read16_remap;
512 		dev->pcmcia_map.write = pcmcia_write16_remap;
513 	}
514 	if(setvpp == 1)
515 		dev->pcmcia_map.set_vpp = pcmciamtd_set_vpp;
516 
517 	/* Request a memory window for PCMCIA. Some architeures can map windows upto the maximum
518 	   that PCMCIA can support (64MiB) - this is ideal and we aim for a window the size of the
519 	   whole card - otherwise we try smaller windows until we succeed */
520 
521 	req.Attributes =  WIN_MEMORY_TYPE_CM | WIN_ENABLE;
522 	req.Attributes |= (dev->pcmcia_map.bankwidth == 1) ? WIN_DATA_WIDTH_8 : WIN_DATA_WIDTH_16;
523 	req.Base = 0;
524 	req.AccessSpeed = mem_speed;
525 	link->win = (window_handle_t)link;
526 	req.Size = (force_size) ? force_size << 20 : MAX_PCMCIA_ADDR;
527 	dev->win_size = 0;
528 
529 	do {
530 		int ret;
531 		DEBUG(2, "requesting window with size = %dKiB memspeed = %d",
532 		      req.Size >> 10, req.AccessSpeed);
533 		ret = pcmcia_request_window(link, &req, &link->win);
534 		DEBUG(2, "ret = %d dev->win_size = %d", ret, dev->win_size);
535 		if(ret) {
536 			req.Size >>= 1;
537 		} else {
538 			DEBUG(2, "Got window of size %dKiB", req.Size >> 10);
539 			dev->win_size = req.Size;
540 			break;
541 		}
542 	} while(req.Size >= 0x1000);
543 
544 	DEBUG(2, "dev->win_size = %d", dev->win_size);
545 
546 	if(!dev->win_size) {
547 		err("Cant allocate memory window");
548 		pcmciamtd_release(link);
549 		return -ENODEV;
550 	}
551 	DEBUG(1, "Allocated a window of %dKiB", dev->win_size >> 10);
552 
553 	/* Get write protect status */
554 	DEBUG(2, "window handle = 0x%8.8lx", (unsigned long)link->win);
555 	dev->win_base = ioremap(req.Base, req.Size);
556 	if(!dev->win_base) {
557 		err("ioremap(%lu, %u) failed", req.Base, req.Size);
558 		pcmciamtd_release(link);
559 		return -ENODEV;
560 	}
561 	DEBUG(1, "mapped window dev = %p req.base = 0x%lx base = %p size = 0x%x",
562 	      dev, req.Base, dev->win_base, req.Size);
563 
564 	dev->offset = 0;
565 	dev->pcmcia_map.map_priv_1 = (unsigned long)dev;
566 	dev->pcmcia_map.map_priv_2 = (unsigned long)link->win;
567 
568 	dev->vpp = (vpp) ? vpp : link->socket.socket.Vpp;
569 	link->conf.Attributes = 0;
570 	if(setvpp == 2) {
571 		link->conf.Vpp = dev->vpp;
572 	} else {
573 		link->conf.Vpp = 0;
574 	}
575 
576 	link->conf.IntType = INT_MEMORY;
577 	link->conf.ConfigIndex = 0;
578 	DEBUG(2, "Setting Configuration");
579 	ret = pcmcia_request_configuration(link, &link->conf);
580 	if (ret != 0) {
581 		if (dev->win_base) {
582 			iounmap(dev->win_base);
583 			dev->win_base = NULL;
584 		}
585 		return -ENODEV;
586 	}
587 
588 	if(mem_type == 1) {
589 		mtd = do_map_probe("map_ram", &dev->pcmcia_map);
590 	} else if(mem_type == 2) {
591 		mtd = do_map_probe("map_rom", &dev->pcmcia_map);
592 	} else {
593 		for(i = 0; i < ARRAY_SIZE(probes); i++) {
594 			DEBUG(1, "Trying %s", probes[i]);
595 			mtd = do_map_probe(probes[i], &dev->pcmcia_map);
596 			if(mtd)
597 				break;
598 
599 			DEBUG(1, "FAILED: %s", probes[i]);
600 		}
601 	}
602 
603 	if(!mtd) {
604 		DEBUG(1, "Cant find an MTD");
605 		pcmciamtd_release(link);
606 		return -ENODEV;
607 	}
608 
609 	dev->mtd_info = mtd;
610 	mtd->owner = THIS_MODULE;
611 
612 	if(new_name) {
613 		int size = 0;
614 		char unit = ' ';
615 		/* Since we are using a default name, make it better by adding in the
616 		   size */
617 		if(mtd->size < 1048576) { /* <1MiB in size, show size in KiB */
618 			size = mtd->size >> 10;
619 			unit = 'K';
620 		} else {
621 			size = mtd->size >> 20;
622 			unit = 'M';
623 		}
624 		snprintf(dev->mtd_name, sizeof(dev->mtd_name), "%d%ciB %s", size, unit, "PCMCIA Memory card");
625 	}
626 
627 	/* If the memory found is fits completely into the mapped PCMCIA window,
628 	   use the faster non-remapping read/write functions */
629 	if(mtd->size <= dev->win_size) {
630 		DEBUG(1, "Using non remapping memory functions");
631 		dev->pcmcia_map.map_priv_2 = (unsigned long)dev->win_base;
632 		if (dev->pcmcia_map.bankwidth == 1) {
633 			dev->pcmcia_map.read = pcmcia_read8;
634 			dev->pcmcia_map.write = pcmcia_write8;
635 		} else {
636 			dev->pcmcia_map.read = pcmcia_read16;
637 			dev->pcmcia_map.write = pcmcia_write16;
638 		}
639 		dev->pcmcia_map.copy_from = pcmcia_copy_from;
640 		dev->pcmcia_map.copy_to = pcmcia_copy_to;
641 	}
642 
643 	if(add_mtd_device(mtd)) {
644 		map_destroy(mtd);
645 		dev->mtd_info = NULL;
646 		err("Couldnt register MTD device");
647 		pcmciamtd_release(link);
648 		return -ENODEV;
649 	}
650 	snprintf(dev->node.dev_name, sizeof(dev->node.dev_name), "mtd%d", mtd->index);
651 	info("mtd%d: %s", mtd->index, mtd->name);
652 	link->dev_node = &dev->node;
653 	return 0;
654 
655  failed:
656 	err("CS Error, exiting");
657 	pcmciamtd_release(link);
658 	return -ENODEV;
659 }
660 
661 
662 static int pcmciamtd_suspend(struct pcmcia_device *dev)
663 {
664 	DEBUG(2, "EVENT_PM_RESUME");
665 
666 	/* get_lock(link); */
667 
668 	return 0;
669 }
670 
671 static int pcmciamtd_resume(struct pcmcia_device *dev)
672 {
673 	DEBUG(2, "EVENT_PM_SUSPEND");
674 
675 	/* free_lock(link); */
676 
677 	return 0;
678 }
679 
680 
681 /* This deletes a driver "instance".  The device is de-registered
682  * with Card Services.  If it has been released, all local data
683  * structures are freed.  Otherwise, the structures will be freed
684  * when the device is released.
685  */
686 
687 static void pcmciamtd_detach(struct pcmcia_device *link)
688 {
689 	struct pcmciamtd_dev *dev = link->priv;
690 
691 	DEBUG(3, "link=0x%p", link);
692 
693 	if(dev->mtd_info) {
694 		del_mtd_device(dev->mtd_info);
695 		map_destroy(dev->mtd_info);
696 		info("mtd%d: Removed", dev->mtd_info->index);
697 	}
698 
699 	pcmciamtd_release(link);
700 }
701 
702 
703 /* pcmciamtd_attach() creates an "instance" of the driver, allocating
704  * local data structures for one device.  The device is registered
705  * with Card Services.
706  */
707 
708 static int pcmciamtd_probe(struct pcmcia_device *link)
709 {
710 	struct pcmciamtd_dev *dev;
711 
712 	/* Create new memory card device */
713 	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
714 	if (!dev) return -ENOMEM;
715 	DEBUG(1, "dev=0x%p", dev);
716 
717 	dev->p_dev = link;
718 	link->priv = dev;
719 
720 	link->conf.Attributes = 0;
721 	link->conf.IntType = INT_MEMORY;
722 
723 	return pcmciamtd_config(link);
724 }
725 
726 static struct pcmcia_device_id pcmciamtd_ids[] = {
727 	PCMCIA_DEVICE_FUNC_ID(1),
728 	PCMCIA_DEVICE_PROD_ID123("IO DATA", "PCS-2M", "2MB SRAM", 0x547e66dc, 0x1fed36cd, 0x36eadd21),
729 	PCMCIA_DEVICE_PROD_ID12("IBM", "2MB SRAM", 0xb569a6e5, 0x36eadd21),
730 	PCMCIA_DEVICE_PROD_ID12("IBM", "4MB FLASH", 0xb569a6e5, 0x8bc54d2a),
731 	PCMCIA_DEVICE_PROD_ID12("IBM", "8MB FLASH", 0xb569a6e5, 0x6df1be3e),
732 	PCMCIA_DEVICE_PROD_ID12("Intel", "S2E20SW", 0x816cc815, 0xd14c9dcf),
733 	PCMCIA_DEVICE_PROD_ID12("Intel", "S2E8 SW", 0x816cc815, 0xa2d7dedb),
734 	PCMCIA_DEVICE_PROD_ID12("intel", "SERIES2-02 ", 0x40ade711, 0x145cea5c),
735 	PCMCIA_DEVICE_PROD_ID12("intel", "SERIES2-04 ", 0x40ade711, 0x42064dda),
736 	PCMCIA_DEVICE_PROD_ID12("intel", "SERIES2-20 ", 0x40ade711, 0x25ee5cb0),
737 	PCMCIA_DEVICE_PROD_ID12("intel", "VALUE SERIES 100 ", 0x40ade711, 0xdf8506d8),
738 	PCMCIA_DEVICE_PROD_ID12("KINGMAX TECHNOLOGY INC.", "SRAM 256K Bytes", 0x54d0c69c, 0xad12c29c),
739 	PCMCIA_DEVICE_PROD_ID12("Maxtor", "MAXFL MobileMax Flash Memory Card", 0xb68968c8, 0x2dfb47b0),
740 	PCMCIA_DEVICE_PROD_ID12("SEIKO EPSON", "WWB101EN20", 0xf9876baf, 0xad0b207b),
741 	PCMCIA_DEVICE_PROD_ID12("SEIKO EPSON", "WWB513EN20", 0xf9876baf, 0xe8d884ad),
742 	PCMCIA_DEVICE_PROD_ID12("Starfish, Inc.", "REX-3000", 0x05ddca47, 0xe7d67bca),
743 	PCMCIA_DEVICE_PROD_ID12("Starfish, Inc.", "REX-4100", 0x05ddca47, 0x7bc32944),
744 	/* the following was commented out in pcmcia-cs-3.2.7 */
745 	/* PCMCIA_DEVICE_PROD_ID12("RATOC Systems,Inc.", "SmartMedia ADAPTER PC Card", 0xf4a2fefe, 0x5885b2ae), */
746 #ifdef CONFIG_MTD_PCMCIA_ANONYMOUS
747 	{ .match_flags = PCMCIA_DEV_ID_MATCH_ANONYMOUS, },
748 #endif
749 	PCMCIA_DEVICE_NULL
750 };
751 MODULE_DEVICE_TABLE(pcmcia, pcmciamtd_ids);
752 
753 static struct pcmcia_driver pcmciamtd_driver = {
754 	.drv		= {
755 		.name	= "pcmciamtd"
756 	},
757 	.probe		= pcmciamtd_probe,
758 	.remove		= pcmciamtd_detach,
759 	.owner		= THIS_MODULE,
760 	.id_table	= pcmciamtd_ids,
761 	.suspend	= pcmciamtd_suspend,
762 	.resume		= pcmciamtd_resume,
763 };
764 
765 
766 static int __init init_pcmciamtd(void)
767 {
768 	info(DRIVER_DESC);
769 
770 	if(bankwidth && bankwidth != 1 && bankwidth != 2) {
771 		info("bad bankwidth (%d), using default", bankwidth);
772 		bankwidth = 2;
773 	}
774 	if(force_size && (force_size < 1 || force_size > 64)) {
775 		info("bad force_size (%d), using default", force_size);
776 		force_size = 0;
777 	}
778 	if(mem_type && mem_type != 1 && mem_type != 2) {
779 		info("bad mem_type (%d), using default", mem_type);
780 		mem_type = 0;
781 	}
782 	return pcmcia_register_driver(&pcmciamtd_driver);
783 }
784 
785 
786 static void __exit exit_pcmciamtd(void)
787 {
788 	DEBUG(1, DRIVER_DESC " unloading");
789 	pcmcia_unregister_driver(&pcmciamtd_driver);
790 }
791 
792 module_init(init_pcmciamtd);
793 module_exit(exit_pcmciamtd);
794