aboutsummaryrefslogtreecommitdiff
path: root/drivers/misc/tifm_7xx1.c
blob: 7fbf5d58bfc506f913b8bb4c3fbc5fff41290e59 (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
/*
 *  tifm_7xx1.c - TI FlashMedia driver
 *
 *  Copyright (C) 2006 Alex Dubov <oakad@yahoo.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 */

#include <linux/tifm.h>
#include <linux/dma-mapping.h>

#define DRIVER_NAME "tifm_7xx1"
#define DRIVER_VERSION "0.7"

static void tifm_7xx1_eject(struct tifm_adapter *fm, struct tifm_dev *sock)
{
	int cnt;
	unsigned long flags;

	spin_lock_irqsave(&fm->lock, flags);
	if (!fm->inhibit_new_cards) {
		for (cnt = 0; cnt < fm->max_sockets; cnt++) {
			if (fm->sockets[cnt] == sock) {
				fm->remove_mask |= (1 << cnt);
				queue_work(fm->wq, &fm->media_remover);
				break;
			}
		}
	}
	spin_unlock_irqrestore(&fm->lock, flags);
}

static void tifm_7xx1_remove_media(struct work_struct *work)
{
	struct tifm_adapter *fm =
		container_of(work, struct tifm_adapter, media_remover);
	unsigned long flags;
	int cnt;
	struct tifm_dev *sock;

	if (!class_device_get(&fm->cdev))
		return;
	spin_lock_irqsave(&fm->lock, flags);
	for (cnt = 0; cnt < fm->max_sockets; cnt++) {
		if (fm->sockets[cnt] && (fm->remove_mask & (1 << cnt))) {
			printk(KERN_INFO DRIVER_NAME
			       ": demand removing card from socket %d\n", cnt);
			sock = fm->sockets[cnt];
			fm->sockets[cnt] = NULL;
			fm->remove_mask &= ~(1 << cnt);

			writel(0x0e00, sock->addr + SOCK_CONTROL);

			writel((TIFM_IRQ_FIFOMASK | TIFM_IRQ_CARDMASK) << cnt,
				fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
			writel((TIFM_IRQ_FIFOMASK | TIFM_IRQ_CARDMASK) << cnt,
				fm->addr + FM_SET_INTERRUPT_ENABLE);

			spin_unlock_irqrestore(&fm->lock, flags);
			device_unregister(&sock->dev);
			spin_lock_irqsave(&fm->lock, flags);
		}
	}
	spin_unlock_irqrestore(&fm->lock, flags);
	class_device_put(&fm->cdev);
}

static irqreturn_t tifm_7xx1_isr(int irq, void *dev_id)
{
	struct tifm_adapter *fm = dev_id;
	struct tifm_dev *sock;
	unsigned int irq_status;
	unsigned int sock_irq_status, cnt;

	spin_lock(&fm->lock);
	irq_status = readl(fm->addr + FM_INTERRUPT_STATUS);
	if (irq_status == 0 || irq_status == (~0)) {
		spin_unlock(&fm->lock);
		return IRQ_NONE;
	}

	if (irq_status & TIFM_IRQ_ENABLE) {
		writel(TIFM_IRQ_ENABLE, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);

		for (cnt = 0; cnt <  fm->max_sockets; cnt++) {
			sock = fm->sockets[cnt];
			sock_irq_status = (irq_status >> cnt) &
					(TIFM_IRQ_FIFOMASK | TIFM_IRQ_CARDMASK);

			if (sock) {
				if (sock_irq_status)
					sock->signal_irq(sock, sock_irq_status);

				if (irq_status & (1 << cnt))
					fm->remove_mask |= 1 << cnt;
			} else {
				if (irq_status & (1 << cnt))
					fm->insert_mask |= 1 << cnt;
			}
		}
	}
	writel(irq_status, fm->addr + FM_INTERRUPT_STATUS);

	if (!fm->inhibit_new_cards) {
		if (!fm->remove_mask && !fm->insert_mask) {
			writel(TIFM_IRQ_ENABLE,
				fm->addr + FM_SET_INTERRUPT_ENABLE);
		} else {
			queue_work(fm->wq, &fm->media_remover);
			queue_work(fm->wq, &fm->media_inserter);
		}
	}

	spin_unlock(&fm->lock);
	return IRQ_HANDLED;
}

static tifm_media_id tifm_7xx1_toggle_sock_power(char __iomem *sock_addr, int is_x2)
{
	unsigned int s_state;
	int cnt;

	writel(0x0e00, sock_addr + SOCK_CONTROL);

	for (cnt = 0; cnt < 100; cnt++) {
		if (!(TIFM_SOCK_STATE_POWERED &
				readl(sock_addr + SOCK_PRESENT_STATE)))
			break;
		msleep(10);
	}

	s_state = readl(sock_addr + SOCK_PRESENT_STATE);
	if (!(TIFM_SOCK_STATE_OCCUPIED & s_state))
		return FM_NULL;

	if (is_x2) {
		writel((s_state & 7) | 0x0c00, sock_addr + SOCK_CONTROL);
	} else {
		// SmartMedia cards need extra 40 msec
		if (((readl(sock_addr + SOCK_PRESENT_STATE) >> 4) & 7) == 1)
			msleep(40);
		writel(readl(sock_addr + SOCK_CONTROL) | TIFM_CTRL_LED,
		       sock_addr + SOCK_CONTROL);
		msleep(10);
		writel((s_state & 0x7) | 0x0c00 | TIFM_CTRL_LED,
			sock_addr + SOCK_CONTROL);
	}

	for (cnt = 0; cnt < 100; cnt++) {
		if ((TIFM_SOCK_STATE_POWERED &
				readl(sock_addr + SOCK_PRESENT_STATE)))
			break;
		msleep(10);
	}

	if (!is_x2)
		writel(readl(sock_addr + SOCK_CONTROL) & (~TIFM_CTRL_LED),
		       sock_addr + SOCK_CONTROL);

	return (readl(sock_addr + SOCK_PRESENT_STATE) >> 4) & 7;
}

inline static char __iomem *
tifm_7xx1_sock_addr(char __iomem *base_addr, unsigned int sock_num)
{
	return base_addr + ((sock_num + 1) << 10);
}

static void tifm_7xx1_insert_media(struct work_struct *work)
{
	struct tifm_adapter *fm =
		container_of(work, struct tifm_adapter, media_inserter);
	unsigned long flags;
	tifm_media_id media_id;
	char *card_name = "xx";
	int cnt, ok_to_register;
	unsigned int insert_mask;
	struct tifm_dev *new_sock = NULL;

	if (!class_device_get(&fm->cdev))
		return;
	spin_lock_irqsave(&fm->lock, flags);
	insert_mask = fm->insert_mask;
	fm->insert_mask = 0;
	if (fm->inhibit_new_cards) {
		spin_unlock_irqrestore(&fm->lock, flags);
		class_device_put(&fm->cdev);
		return;
	}
	spin_unlock_irqrestore(&fm->lock, flags);

	for (cnt = 0; cnt < fm->max_sockets; cnt++) {
		if (!(insert_mask & (1 << cnt)))
			continue;

		media_id = tifm_7xx1_toggle_sock_power(tifm_7xx1_sock_addr(fm->addr, cnt),
						       fm->max_sockets == 2);
		if (media_id) {
			ok_to_register = 0;
			new_sock = tifm_alloc_device(fm);
			if (new_sock) {
				new_sock->addr = tifm_7xx1_sock_addr(fm->addr,
									cnt);
				new_sock->media_id = media_id;
				new_sock->socket_id = cnt;
				switch (media_id) {
				case 1:
					card_name = "xd";
					break;
				case 2:
					card_name = "ms";
					break;
				case 3:
					card_name = "sd";
					break;
				default:
					break;
				}
				snprintf(new_sock->dev.bus_id, BUS_ID_SIZE,
					"tifm_%s%u:%u", card_name, fm->id, cnt);
				printk(KERN_INFO DRIVER_NAME
					": %s card detected in socket %d\n",
					card_name, cnt);
				spin_lock_irqsave(&fm->lock, flags);
				if (!fm->sockets[cnt]) {
					fm->sockets[cnt] = new_sock;
					ok_to_register = 1;
				}
				spin_unlock_irqrestore(&fm->lock, flags);
				if (!ok_to_register ||
					    device_register(&new_sock->dev)) {
					spin_lock_irqsave(&fm->lock, flags);
					fm->sockets[cnt] = NULL;
					spin_unlock_irqrestore(&fm->lock,
								flags);
					tifm_free_device(&new_sock->dev);
				}
			}
		}
		writel((TIFM_IRQ_FIFOMASK | TIFM_IRQ_CARDMASK) << cnt,
		       fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
		writel((TIFM_IRQ_FIFOMASK | TIFM_IRQ_CARDMASK) << cnt,
		       fm->addr + FM_SET_INTERRUPT_ENABLE);
	}

	writel(TIFM_IRQ_ENABLE, fm->addr + FM_SET_INTERRUPT_ENABLE);
	class_device_put(&fm->cdev);
}

static int tifm_7xx1_suspend(struct pci_dev *dev, pm_message_t state)
{
	struct tifm_adapter *fm = pci_get_drvdata(dev);
	unsigned long flags;

	spin_lock_irqsave(&fm->lock, flags);
	fm->inhibit_new_cards = 1;
	fm->remove_mask = 0xf;
	fm->insert_mask = 0;
	writel(TIFM_IRQ_ENABLE, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
	spin_unlock_irqrestore(&fm->lock, flags);
	flush_workqueue(fm->wq);

	tifm_7xx1_remove_media(&fm->media_remover);

	pci_set_power_state(dev, PCI_D3hot);
        pci_disable_device(dev);
        pci_save_state(dev);
	return 0;
}

static int tifm_7xx1_resume(struct pci_dev *dev)
{
	struct tifm_adapter *fm = pci_get_drvdata(dev);
	unsigned long flags;

	pci_restore_state(dev);
        pci_enable_device(dev);
        pci_set_power_state(dev, PCI_D0);
        pci_set_master(dev);

	spin_lock_irqsave(&fm->lock, flags);
	fm->inhibit_new_cards = 0;
	writel(TIFM_IRQ_SETALL, fm->addr + FM_INTERRUPT_STATUS);
	writel(TIFM_IRQ_SETALL, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
	writel(TIFM_IRQ_ENABLE | TIFM_IRQ_SETALLSOCK,
		fm->addr + FM_SET_INTERRUPT_ENABLE);
	fm->insert_mask = 0xf;
	spin_unlock_irqrestore(&fm->lock, flags);
	return 0;
}

static int tifm_7xx1_probe(struct pci_dev *dev,
			const struct pci_device_id *dev_id)
{
	struct tifm_adapter *fm;
	int pci_dev_busy = 0;
	int rc;

	rc = pci_set_dma_mask(dev, DMA_32BIT_MASK);
	if (rc)
		return rc;

	rc = pci_enable_device(dev);
	if (rc)
		return rc;

	pci_set_master(dev);

	rc = pci_request_regions(dev, DRIVER_NAME);
	if (rc) {
		pci_dev_busy = 1;
		goto err_out;
	}

	pci_intx(dev, 1);

	fm = tifm_alloc_adapter();
	if (!fm) {
		rc = -ENOMEM;
		goto err_out_int;
	}

	fm->dev = &dev->dev;
	fm->max_sockets = (dev->device == 0x803B) ? 2 : 4;
	fm->sockets = kzalloc(sizeof(struct tifm_dev*) * fm->max_sockets,
				GFP_KERNEL);
	if (!fm->sockets)
		goto err_out_free;

	INIT_WORK(&fm->media_inserter, tifm_7xx1_insert_media);
	INIT_WORK(&fm->media_remover, tifm_7xx1_remove_media);
	fm->eject = tifm_7xx1_eject;
	pci_set_drvdata(dev, fm);

	fm->addr = ioremap(pci_resource_start(dev, 0),
				pci_resource_len(dev, 0));
	if (!fm->addr)
		goto err_out_free;

	rc = request_irq(dev->irq, tifm_7xx1_isr, SA_SHIRQ, DRIVER_NAME, fm);
	if (rc)
		goto err_out_unmap;

	rc = tifm_add_adapter(fm);
	if (rc)
		goto err_out_irq;

	writel(TIFM_IRQ_SETALL, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
	writel(TIFM_IRQ_ENABLE | TIFM_IRQ_SETALLSOCK,
		fm->addr + FM_SET_INTERRUPT_ENABLE);

	fm->insert_mask = 0xf;

	return 0;

err_out_irq:
	free_irq(dev->irq, fm);
err_out_unmap:
	iounmap(fm->addr);
err_out_free:
	pci_set_drvdata(dev, NULL);
	tifm_free_adapter(fm);
err_out_int:
	pci_intx(dev, 0);
	pci_release_regions(dev);
err_out:
	if (!pci_dev_busy)
		pci_disable_device(dev);
	return rc;
}

static void tifm_7xx1_remove(struct pci_dev *dev)
{
	struct tifm_adapter *fm = pci_get_drvdata(dev);
	unsigned long flags;

	spin_lock_irqsave(&fm->lock, flags);
	fm->inhibit_new_cards = 1;
	fm->remove_mask = 0xf;
	fm->insert_mask = 0;
	writel(TIFM_IRQ_ENABLE, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
	spin_unlock_irqrestore(&fm->lock, flags);

	flush_workqueue(fm->wq);

	tifm_7xx1_remove_media(&fm->media_remover);

	writel(TIFM_IRQ_SETALL, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
	free_irq(dev->irq, fm);

	tifm_remove_adapter(fm);

	pci_set_drvdata(dev, NULL);

	iounmap(fm->addr);
	pci_intx(dev, 0);
	pci_release_regions(dev);

	pci_disable_device(dev);
	tifm_free_adapter(fm);
}

static struct pci_device_id tifm_7xx1_pci_tbl [] = {
	{ PCI_VENDOR_ID_TI, 0x8033, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
	  0 }, /* xx21 - the one I have */
        { PCI_VENDOR_ID_TI, 0x803B, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
	  0 }, /* xx12 - should be also supported */
	{ }
};

static struct pci_driver tifm_7xx1_driver = {
	.name = DRIVER_NAME,
	.id_table = tifm_7xx1_pci_tbl,
	.probe = tifm_7xx1_probe,
	.remove = tifm_7xx1_remove,
	.suspend = tifm_7xx1_suspend,
	.resume = tifm_7xx1_resume,
};

static int __init tifm_7xx1_init(void)
{
	return pci_register_driver(&tifm_7xx1_driver);
}

static void __exit tifm_7xx1_exit(void)
{
	pci_unregister_driver(&tifm_7xx1_driver);
}

MODULE_AUTHOR("Alex Dubov");
MODULE_DESCRIPTION("TI FlashMedia host driver");
MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(pci, tifm_7xx1_pci_tbl);
MODULE_VERSION(DRIVER_VERSION);

module_init(tifm_7xx1_init);
module_exit(tifm_7xx1_exit);