summaryrefslogtreecommitdiffstats
path: root/drivers/pcmcia/au1000_generic.c
blob: 5387de6216fbecd2e2a01daee84f913c430fdd56 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
/*
 *
 * Alchemy Semi Au1000 pcmcia driver
 *
 * Copyright 2001-2003 MontaVista Software Inc.
 * Author: MontaVista Software, Inc.
 *         	ppopov@embeddedalley.com or source@mvista.com
 *
 * Copyright 2004 Pete Popov, Embedded Alley Solutions, Inc.
 * Updated the driver to 2.6. Followed the sa11xx API and largely
 * copied many of the hardware independent functions.
 *
 * ########################################################################
 *
 *  This program is free software; you can distribute it and/or modify it
 *  under the terms of the GNU General Public License (Version 2) as
 *  published by the Free Software Foundation.
 *
 *  This program is distributed in the hope it will be useful, but WITHOUT
 *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 *  for more details.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
 *
 * ########################################################################
 *
 * 
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/cpufreq.h>
#include <linux/ioport.h>
#include <linux/kernel.h>
#include <linux/timer.h>
#include <linux/mm.h>
#include <linux/notifier.h>
#include <linux/interrupt.h>
#include <linux/spinlock.h>
#include <linux/platform_device.h>

#include <asm/io.h>
#include <asm/irq.h>
#include <asm/system.h>

#include <asm/mach-au1x00/au1000.h>
#include "au1000_generic.h"

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Pete Popov <ppopov@embeddedalley.com>");
MODULE_DESCRIPTION("Linux PCMCIA Card Services: Au1x00 Socket Controller");

#if 0
#define debug(x,args...) printk(KERN_DEBUG "%s: " x, __func__ , ##args)
#else
#define debug(x,args...)
#endif

#define MAP_SIZE 0x100000
extern struct au1000_pcmcia_socket au1000_pcmcia_socket[];
#define PCMCIA_SOCKET(x)	(au1000_pcmcia_socket + (x))
#define to_au1000_socket(x)	container_of(x, struct au1000_pcmcia_socket, socket)

/* Some boards like to support CF cards as IDE root devices, so they
 * grab pcmcia sockets directly.
 */
u32 *pcmcia_base_vaddrs[2];
extern const unsigned long mips_io_port_base;

DECLARE_MUTEX(pcmcia_sockets_lock);

static int (*au1x00_pcmcia_hw_init[])(struct device *dev) = {
	au1x_board_init,
};

static int
au1x00_pcmcia_skt_state(struct au1000_pcmcia_socket *skt)
{
	struct pcmcia_state state;
	unsigned int stat;

	memset(&state, 0, sizeof(struct pcmcia_state));

	skt->ops->socket_state(skt, &state);

	stat = state.detect  ? SS_DETECT : 0;
	stat |= state.ready  ? SS_READY  : 0;
	stat |= state.wrprot ? SS_WRPROT : 0;
	stat |= state.vs_3v  ? SS_3VCARD : 0;
	stat |= state.vs_Xv  ? SS_XVCARD : 0;
	stat |= skt->cs_state.Vcc ? SS_POWERON : 0;

	if (skt->cs_state.flags & SS_IOCARD)
		stat |= state.bvd1 ? SS_STSCHG : 0;
	else {
		if (state.bvd1 == 0)
			stat |= SS_BATDEAD;
		else if (state.bvd2 == 0)
			stat |= SS_BATWARN;
	}
	return stat;
}

/*
 * au100_pcmcia_config_skt
 *
 * Convert PCMCIA socket state to our socket configure structure.
 */
static int
au1x00_pcmcia_config_skt(struct au1000_pcmcia_socket *skt, socket_state_t *state)
{
	int ret;

	ret = skt->ops->configure_socket(skt, state);
	if (ret == 0) {
		skt->cs_state = *state;
	}

	if (ret < 0)
		debug("unable to configure socket %d\n", skt->nr);

	return ret;
}

/* au1x00_pcmcia_sock_init()
 *
 * (Re-)Initialise the socket, turning on status interrupts
 * and PCMCIA bus.  This must wait for power to stabilise
 * so that the card status signals report correctly.
 *
 * Returns: 0
 */
static int au1x00_pcmcia_sock_init(struct pcmcia_socket *sock)
{
	struct au1000_pcmcia_socket *skt = to_au1000_socket(sock);

	debug("initializing socket %u\n", skt->nr);

	skt->ops->socket_init(skt);
	return 0;
}

/*
 * au1x00_pcmcia_suspend()
 *
 * Remove power on the socket, disable IRQs from the card.
 * Turn off status interrupts, and disable the PCMCIA bus.
 *
 * Returns: 0
 */
static int au1x00_pcmcia_suspend(struct pcmcia_socket *sock)
{
	struct au1000_pcmcia_socket *skt = to_au1000_socket(sock);

	debug("suspending socket %u\n", skt->nr);

	skt->ops->socket_suspend(skt);

	return 0;
}

static DEFINE_SPINLOCK(status_lock);

/*
 * au1x00_check_status()
 */
static void au1x00_check_status(struct au1000_pcmcia_socket *skt)
{
	unsigned int events;

	debug("entering PCMCIA monitoring thread\n");

	do {
		unsigned int status;
		unsigned long flags;

		status = au1x00_pcmcia_skt_state(skt);

		spin_lock_irqsave(&status_lock, flags);
		events = (status ^ skt->status) & skt->cs_state.csc_mask;
		skt->status = status;
		spin_unlock_irqrestore(&status_lock, flags);

		debug("events: %s%s%s%s%s%s\n",
			events == 0         ? "<NONE>"   : "",
			events & SS_DETECT  ? "DETECT "  : "",
			events & SS_READY   ? "READY "   : "",
			events & SS_BATDEAD ? "BATDEAD " : "",
			events & SS_BATWARN ? "BATWARN " : "",
			events & SS_STSCHG  ? "STSCHG "  : "");

		if (events)
			pcmcia_parse_events(&skt->socket, events);
	} while (events);
}

/* 
 * au1x00_pcmcia_poll_event()
 * Let's poll for events in addition to IRQs since IRQ only is unreliable...
 */
static void au1x00_pcmcia_poll_event(unsigned long dummy)
{
	struct au1000_pcmcia_socket *skt = (struct au1000_pcmcia_socket *)dummy;
	debug("polling for events\n");

	mod_timer(&skt->poll_timer, jiffies + AU1000_PCMCIA_POLL_PERIOD);

	au1x00_check_status(skt);
}

/* au1x00_pcmcia_get_status()
 *
 * From the sa11xx_core.c:
 * Implements the get_status() operation for the in-kernel PCMCIA
 * service (formerly SS_GetStatus in Card Services). Essentially just
 * fills in bits in `status' according to internal driver state or
 * the value of the voltage detect chipselect register.
 *
 * As a debugging note, during card startup, the PCMCIA core issues
 * three set_socket() commands in a row the first with RESET deasserted,
 * the second with RESET asserted, and the last with RESET deasserted
 * again. Following the third set_socket(), a get_status() command will
 * be issued. The kernel is looking for the SS_READY flag (see
 * setup_socket(), reset_socket(), and unreset_socket() in cs.c).
 *
 * Returns: 0
 */
static int
au1x00_pcmcia_get_status(struct pcmcia_socket *sock, unsigned int *status)
{
	struct au1000_pcmcia_socket *skt = to_au1000_socket(sock);

	skt->status = au1x00_pcmcia_skt_state(skt);
	*status = skt->status;

	return 0;
}

/* au1x00_pcmcia_set_socket()
 * Implements the set_socket() operation for the in-kernel PCMCIA
 * service (formerly SS_SetSocket in Card Services). We more or
 * less punt all of this work and let the kernel handle the details
 * of power configuration, reset, &c. We also record the value of
 * `state' in order to regurgitate it to the PCMCIA core later.
 *
 * Returns: 0
 */
static int
au1x00_pcmcia_set_socket(struct pcmcia_socket *sock, socket_state_t *state)
{
  struct au1000_pcmcia_socket *skt = to_au1000_socket(sock);

  debug("for sock %u\n", skt->nr);

  debug("\tmask:  %s%s%s%s%s%s\n\tflags: %s%s%s%s%s%s\n",
	(state->csc_mask==0)?"<NONE>":"",
	(state->csc_mask&SS_DETECT)?"DETECT ":"",
	(state->csc_mask&SS_READY)?"READY ":"",
	(state->csc_mask&SS_BATDEAD)?"BATDEAD ":"",
	(state->csc_mask&SS_BATWARN)?"BATWARN ":"",
	(state->csc_mask&SS_STSCHG)?"STSCHG ":"",
	(state->flags==0)?"<NONE>":"",
	(state->flags&SS_PWR_AUTO)?"PWR_AUTO ":"",
	(state->flags&SS_IOCARD)?"IOCARD ":"",
	(state->flags&SS_RESET)?"RESET ":"",
	(state->flags&SS_SPKR_ENA)?"SPKR_ENA ":"",
	(state->flags&SS_OUTPUT_ENA)?"OUTPUT_ENA ":"");
  debug("\tVcc %d  Vpp %d  irq %d\n",
	state->Vcc, state->Vpp, state->io_irq);

  return au1x00_pcmcia_config_skt(skt, state);
}

int 
au1x00_pcmcia_set_io_map(struct pcmcia_socket *sock, struct pccard_io_map *map)
{
	struct au1000_pcmcia_socket *skt = to_au1000_socket(sock);
	unsigned int speed;

	if(map->map>=MAX_IO_WIN){
		debug("map (%d) out of range\n", map->map);
		return -1;
	}

	if(map->flags&MAP_ACTIVE){
		speed=(map->speed>0)?map->speed:AU1000_PCMCIA_IO_SPEED;
		skt->spd_io[map->map] = speed;
	}

	map->start=(ioaddr_t)(u32)skt->virt_io;
	map->stop=map->start+MAP_SIZE;
	return 0;

}  /* au1x00_pcmcia_set_io_map() */


static int 
au1x00_pcmcia_set_mem_map(struct pcmcia_socket *sock, struct pccard_mem_map *map)
{
	struct au1000_pcmcia_socket *skt = to_au1000_socket(sock);
	unsigned short speed = map->speed;

	if(map->map>=MAX_WIN){
		debug("map (%d) out of range\n", map->map);
		return -1;
	}

	if (map->flags & MAP_ATTRIB) {
		skt->spd_attr[map->map] = speed;
		skt->spd_mem[map->map] = 0;
	} else {
		skt->spd_attr[map->map] = 0;
		skt->spd_mem[map->map] = speed;
	}

	if (map->flags & MAP_ATTRIB) {
		map->static_start = skt->phys_attr + map->card_start;
	}
	else {
		map->static_start = skt->phys_mem + map->card_start;
	}

	debug("set_mem_map %d start %08lx card_start %08x\n",
			map->map, map->static_start, map->card_start);
	return 0;

}  /* au1x00_pcmcia_set_mem_map() */

static struct pccard_operations au1x00_pcmcia_operations = {
	.init			= au1x00_pcmcia_sock_init,
	.suspend		= au1x00_pcmcia_suspend,
	.get_status		= au1x00_pcmcia_get_status,
	.set_socket		= au1x00_pcmcia_set_socket,
	.set_io_map		= au1x00_pcmcia_set_io_map,
	.set_mem_map		= au1x00_pcmcia_set_mem_map,
};

static const char *skt_names[] = {
	"PCMCIA socket 0",
	"PCMCIA socket 1",
};

struct skt_dev_info {
	int nskt;
};

int au1x00_pcmcia_socket_probe(struct device *dev, struct pcmcia_low_level *ops, int first, int nr)
{
	struct skt_dev_info *sinfo;
	struct au1000_pcmcia_socket *skt;
	int ret, i;

	sinfo = kzalloc(sizeof(struct skt_dev_info), GFP_KERNEL);
	if (!sinfo) {
		ret = -ENOMEM;
		goto out;
	}

	sinfo->nskt = nr;

	/*
	 * Initialise the per-socket structure.
	 */
	for (i = 0; i < nr; i++) {
		skt = PCMCIA_SOCKET(i);
		memset(skt, 0, sizeof(*skt));

		skt->socket.resource_ops = &pccard_static_ops;
		skt->socket.ops = &au1x00_pcmcia_operations;
		skt->socket.owner = ops->owner;
		skt->socket.dev.dev = dev;

		init_timer(&skt->poll_timer);
		skt->poll_timer.function = au1x00_pcmcia_poll_event;
		skt->poll_timer.data = (unsigned long)skt;
		skt->poll_timer.expires = jiffies + AU1000_PCMCIA_POLL_PERIOD;

		skt->nr		= first + i;
		skt->irq	= 255;
		skt->dev	= dev;
		skt->ops	= ops;

		skt->res_skt.name	= skt_names[skt->nr];
		skt->res_io.name	= "io";
		skt->res_io.flags	= IORESOURCE_MEM | IORESOURCE_BUSY;
		skt->res_mem.name	= "memory";
		skt->res_mem.flags	= IORESOURCE_MEM;
		skt->res_attr.name	= "attribute";
		skt->res_attr.flags	= IORESOURCE_MEM;

		/*
		 * PCMCIA client drivers use the inb/outb macros to access the
		 * IO registers. Since mips_io_port_base is added to the
		 * access address of the mips implementation of inb/outb,
		 * we need to subtract it here because we want to access the
		 * I/O or MEM address directly, without going through this
		 * "mips_io_port_base" mechanism.
		 */
		if (i == 0) {
			skt->virt_io = (void *)
				(ioremap((phys_t)AU1X_SOCK0_IO, 0x1000) -
				(u32)mips_io_port_base);
			skt->phys_attr = AU1X_SOCK0_PSEUDO_PHYS_ATTR;
			skt->phys_mem = AU1X_SOCK0_PSEUDO_PHYS_MEM;
		}
#ifndef CONFIG_MIPS_XXS1500
		else  {
			skt->virt_io = (void *)
				(ioremap((phys_t)AU1X_SOCK1_IO, 0x1000) -
				(u32)mips_io_port_base);
			skt->phys_attr = AU1X_SOCK1_PSEUDO_PHYS_ATTR;
			skt->phys_mem = AU1X_SOCK1_PSEUDO_PHYS_MEM;
		}
#endif
		pcmcia_base_vaddrs[i] = (u32 *)skt->virt_io;
		ret = ops->hw_init(skt);

		skt->socket.features = SS_CAP_STATIC_MAP|SS_CAP_PCCARD;
		skt->socket.irq_mask = 0;
		skt->socket.map_size = MAP_SIZE;
		skt->socket.pci_irq = skt->irq;
		skt->socket.io_offset = (unsigned long)skt->virt_io;

		skt->status = au1x00_pcmcia_skt_state(skt);

		ret = pcmcia_register_socket(&skt->socket);
		if (ret)
			goto out_err;

		WARN_ON(skt->socket.sock != i);

		add_timer(&skt->poll_timer);
	}

	dev_set_drvdata(dev, sinfo);
	return 0;


out_err:
	flush_scheduled_work();
	ops->hw_shutdown(skt);
	while (i-- > 0) {
		skt = PCMCIA_SOCKET(i);

		del_timer_sync(&skt->poll_timer);
		pcmcia_unregister_socket(&skt->socket);
		flush_scheduled_work();
		ops->hw_shutdown(skt);

	}
	kfree(sinfo);
out:
	return ret;
}

int au1x00_drv_pcmcia_remove(struct device *dev)
{
	struct skt_dev_info *sinfo = dev_get_drvdata(dev);
	int i;

	down(&pcmcia_sockets_lock);
	dev_set_drvdata(dev, NULL);

	for (i = 0; i < sinfo->nskt; i++) {
		struct au1000_pcmcia_socket *skt = PCMCIA_SOCKET(i);

		del_timer_sync(&skt->poll_timer);
		pcmcia_unregister_socket(&skt->socket);
		flush_scheduled_work();
		skt->ops->hw_shutdown(skt);
		au1x00_pcmcia_config_skt(skt, &dead_socket);
		iounmap(skt->virt_io + (u32)mips_io_port_base);
		skt->virt_io = NULL;
	}

	kfree(sinfo);
	up(&pcmcia_sockets_lock);
	return 0;
}


/*
 * PCMCIA "Driver" API
 */

static int au1x00_drv_pcmcia_probe(struct device *dev)
{
	int i, ret = -ENODEV;

	down(&pcmcia_sockets_lock);
	for (i=0; i < ARRAY_SIZE(au1x00_pcmcia_hw_init); i++) {
		ret = au1x00_pcmcia_hw_init[i](dev);
		if (ret == 0)
			break;
	}
	up(&pcmcia_sockets_lock);
	return ret;
}


static struct device_driver au1x00_pcmcia_driver = {
	.probe		= au1x00_drv_pcmcia_probe,
	.remove		= au1x00_drv_pcmcia_remove,
	.name		= "au1x00-pcmcia",
	.bus		= &platform_bus_type,
	.suspend	= pcmcia_socket_dev_suspend,
	.resume		= pcmcia_socket_dev_resume,
};


/* au1x00_pcmcia_init()
 *
 * This routine performs low-level PCMCIA initialization and then
 * registers this socket driver with Card Services.
 *
 * Returns: 0 on success, -ve error code on failure
 */
static int __init au1x00_pcmcia_init(void)
{
	int error = 0;
	if ((error = driver_register(&au1x00_pcmcia_driver)))
		return error;
	return error;
}

/* au1x00_pcmcia_exit()
 * Invokes the low-level kernel service to free IRQs associated with this
 * socket controller and reset GPIO edge detection.
 */
static void __exit au1x00_pcmcia_exit(void)
{
	driver_unregister(&au1x00_pcmcia_driver);
}

module_init(au1x00_pcmcia_init);
module_exit(au1x00_pcmcia_exit);
OpenPOWER on IntegriCloud