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[hh.org.git] / drivers / misc / tifm_7xx1.c
blob1ba8754e93837e417fb88155aeb0bcd968ca9e79
1 /*
2 * tifm_7xx1.c - TI FlashMedia driver
3 *
4 * Copyright (C) 2006 Alex Dubov <oakad@yahoo.com>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 *
10 */
11
12 #include <linux/tifm.h>
13 #include <linux/dma-mapping.h>
14
15 #define DRIVER_NAME "tifm_7xx1"
16 #define DRIVER_VERSION "0.6"
17
18 static void tifm_7xx1_eject(struct tifm_adapter *fm, struct tifm_dev *sock)
19 {
20 int cnt;
21 unsigned long flags;
22
23 spin_lock_irqsave(&fm->lock, flags);
24 if (!fm->inhibit_new_cards) {
25 for (cnt = 0; cnt < fm->max_sockets; cnt++) {
26 if (fm->sockets[cnt] == sock) {
27 fm->remove_mask |= (1 << cnt);
28 queue_work(fm->wq, &fm->media_remover);
29 break;
30 }
31 }
32 }
33 spin_unlock_irqrestore(&fm->lock, flags);
34 }
35
36 static void tifm_7xx1_remove_media(void *adapter)
37 {
38 struct tifm_adapter *fm = adapter;
39 unsigned long flags;
40 int cnt;
41 struct tifm_dev *sock;
42
43 if (!class_device_get(&fm->cdev))
44 return;
45 spin_lock_irqsave(&fm->lock, flags);
46 for (cnt = 0; cnt < fm->max_sockets; cnt++) {
47 if (fm->sockets[cnt] && (fm->remove_mask & (1 << cnt))) {
48 printk(KERN_INFO DRIVER_NAME
49 ": demand removing card from socket %d\n", cnt);
50 sock = fm->sockets[cnt];
51 fm->sockets[cnt] = NULL;
52 fm->remove_mask &= ~(1 << cnt);
53
54 writel(0x0e00, sock->addr + SOCK_CONTROL);
55
56 writel((TIFM_IRQ_FIFOMASK | TIFM_IRQ_CARDMASK) << cnt,
57 fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
58 writel((TIFM_IRQ_FIFOMASK | TIFM_IRQ_CARDMASK) << cnt,
59 fm->addr + FM_SET_INTERRUPT_ENABLE);
60
61 spin_unlock_irqrestore(&fm->lock, flags);
62 device_unregister(&sock->dev);
63 spin_lock_irqsave(&fm->lock, flags);
64 }
65 }
66 spin_unlock_irqrestore(&fm->lock, flags);
67 class_device_put(&fm->cdev);
68 }
69
70 static irqreturn_t tifm_7xx1_isr(int irq, void *dev_id)
71 {
72 struct tifm_adapter *fm = dev_id;
73 unsigned int irq_status;
74 unsigned int sock_irq_status, cnt;
75
76 spin_lock(&fm->lock);
77 irq_status = readl(fm->addr + FM_INTERRUPT_STATUS);
78 if (irq_status == 0 || irq_status == (~0)) {
79 spin_unlock(&fm->lock);
80 return IRQ_NONE;
81 }
82
83 if (irq_status & TIFM_IRQ_ENABLE) {
84 writel(TIFM_IRQ_ENABLE, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
85
86 for (cnt = 0; cnt < fm->max_sockets; cnt++) {
87 sock_irq_status = (irq_status >> cnt) &
88 (TIFM_IRQ_FIFOMASK | TIFM_IRQ_CARDMASK);
89
90 if (fm->sockets[cnt]) {
91 if (sock_irq_status &&
92 fm->sockets[cnt]->signal_irq)
93 sock_irq_status = fm->sockets[cnt]->
94 signal_irq(fm->sockets[cnt],
95 sock_irq_status);
96
97 if (irq_status & (1 << cnt))
98 fm->remove_mask |= 1 << cnt;
99 } else {
100 if (irq_status & (1 << cnt))
101 fm->insert_mask |= 1 << cnt;
102 }
103 }
104 }
105 writel(irq_status, fm->addr + FM_INTERRUPT_STATUS);
106
107 if (!fm->inhibit_new_cards) {
108 if (!fm->remove_mask && !fm->insert_mask) {
109 writel(TIFM_IRQ_ENABLE,
110 fm->addr + FM_SET_INTERRUPT_ENABLE);
111 } else {
112 queue_work(fm->wq, &fm->media_remover);
113 queue_work(fm->wq, &fm->media_inserter);
114 }
115 }
116
117 spin_unlock(&fm->lock);
118 return IRQ_HANDLED;
119 }
120
121 static tifm_media_id tifm_7xx1_toggle_sock_power(char __iomem *sock_addr, int is_x2)
122 {
123 unsigned int s_state;
124 int cnt;
125
126 writel(0x0e00, sock_addr + SOCK_CONTROL);
127
128 for (cnt = 0; cnt < 100; cnt++) {
129 if (!(TIFM_SOCK_STATE_POWERED &
130 readl(sock_addr + SOCK_PRESENT_STATE)))
131 break;
132 msleep(10);
133 }
134
135 s_state = readl(sock_addr + SOCK_PRESENT_STATE);
136 if (!(TIFM_SOCK_STATE_OCCUPIED & s_state))
137 return FM_NULL;
138
139 if (is_x2) {
140 writel((s_state & 7) | 0x0c00, sock_addr + SOCK_CONTROL);
141 } else {
142 // SmartMedia cards need extra 40 msec
143 if (((readl(sock_addr + SOCK_PRESENT_STATE) >> 4) & 7) == 1)
144 msleep(40);
145 writel(readl(sock_addr + SOCK_CONTROL) | TIFM_CTRL_LED,
146 sock_addr + SOCK_CONTROL);
147 msleep(10);
148 writel((s_state & 0x7) | 0x0c00 | TIFM_CTRL_LED,
149 sock_addr + SOCK_CONTROL);
150 }
151
152 for (cnt = 0; cnt < 100; cnt++) {
153 if ((TIFM_SOCK_STATE_POWERED &
154 readl(sock_addr + SOCK_PRESENT_STATE)))
155 break;
156 msleep(10);
157 }
158
159 if (!is_x2)
160 writel(readl(sock_addr + SOCK_CONTROL) & (~TIFM_CTRL_LED),
161 sock_addr + SOCK_CONTROL);
162
163 return (readl(sock_addr + SOCK_PRESENT_STATE) >> 4) & 7;
164 }
165
166 inline static char __iomem *
167 tifm_7xx1_sock_addr(char __iomem *base_addr, unsigned int sock_num)
168 {
169 return base_addr + ((sock_num + 1) << 10);
170 }
171
172 static void tifm_7xx1_insert_media(void *adapter)
173 {
174 struct tifm_adapter *fm = adapter;
175 unsigned long flags;
176 tifm_media_id media_id;
177 char *card_name = "xx";
178 int cnt, ok_to_register;
179 unsigned int insert_mask;
180 struct tifm_dev *new_sock = NULL;
181
182 if (!class_device_get(&fm->cdev))
183 return;
184 spin_lock_irqsave(&fm->lock, flags);
185 insert_mask = fm->insert_mask;
186 fm->insert_mask = 0;
187 if (fm->inhibit_new_cards) {
188 spin_unlock_irqrestore(&fm->lock, flags);
189 class_device_put(&fm->cdev);
190 return;
191 }
192 spin_unlock_irqrestore(&fm->lock, flags);
193
194 for (cnt = 0; cnt < fm->max_sockets; cnt++) {
195 if (!(insert_mask & (1 << cnt)))
196 continue;
197
198 media_id = tifm_7xx1_toggle_sock_power(tifm_7xx1_sock_addr(fm->addr, cnt),
199 fm->max_sockets == 2);
200 if (media_id) {
201 ok_to_register = 0;
202 new_sock = tifm_alloc_device(fm, cnt);
203 if (new_sock) {
204 new_sock->addr = tifm_7xx1_sock_addr(fm->addr,
205 cnt);
206 new_sock->media_id = media_id;
207 switch (media_id) {
208 case 1:
209 card_name = "xd";
210 break;
211 case 2:
212 card_name = "ms";
213 break;
214 case 3:
215 card_name = "sd";
216 break;
217 default:
218 break;
219 }
220 snprintf(new_sock->dev.bus_id, BUS_ID_SIZE,
221 "tifm_%s%u:%u", card_name, fm->id, cnt);
222 printk(KERN_INFO DRIVER_NAME
223 ": %s card detected in socket %d\n",
224 card_name, cnt);
225 spin_lock_irqsave(&fm->lock, flags);
226 if (!fm->sockets[cnt]) {
227 fm->sockets[cnt] = new_sock;
228 ok_to_register = 1;
229 }
230 spin_unlock_irqrestore(&fm->lock, flags);
231 if (!ok_to_register ||
232 device_register(&new_sock->dev)) {
233 spin_lock_irqsave(&fm->lock, flags);
234 fm->sockets[cnt] = NULL;
235 spin_unlock_irqrestore(&fm->lock,
236 flags);
237 tifm_free_device(&new_sock->dev);
238 }
239 }
240 }
241 writel((TIFM_IRQ_FIFOMASK | TIFM_IRQ_CARDMASK) << cnt,
242 fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
243 writel((TIFM_IRQ_FIFOMASK | TIFM_IRQ_CARDMASK) << cnt,
244 fm->addr + FM_SET_INTERRUPT_ENABLE);
245 }
246
247 writel(TIFM_IRQ_ENABLE, fm->addr + FM_SET_INTERRUPT_ENABLE);
248 class_device_put(&fm->cdev);
249 }
250
251 static int tifm_7xx1_suspend(struct pci_dev *dev, pm_message_t state)
252 {
253 struct tifm_adapter *fm = pci_get_drvdata(dev);
254 unsigned long flags;
255
256 spin_lock_irqsave(&fm->lock, flags);
257 fm->inhibit_new_cards = 1;
258 fm->remove_mask = 0xf;
259 fm->insert_mask = 0;
260 writel(TIFM_IRQ_ENABLE, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
261 spin_unlock_irqrestore(&fm->lock, flags);
262 flush_workqueue(fm->wq);
263
264 tifm_7xx1_remove_media(fm);
265
266 pci_set_power_state(dev, PCI_D3hot);
267 pci_disable_device(dev);
268 pci_save_state(dev);
269 return 0;
270 }
271
272 static int tifm_7xx1_resume(struct pci_dev *dev)
273 {
274 struct tifm_adapter *fm = pci_get_drvdata(dev);
275 unsigned long flags;
276
277 pci_restore_state(dev);
278 pci_enable_device(dev);
279 pci_set_power_state(dev, PCI_D0);
280 pci_set_master(dev);
281
282 spin_lock_irqsave(&fm->lock, flags);
283 fm->inhibit_new_cards = 0;
284 writel(TIFM_IRQ_SETALL, fm->addr + FM_INTERRUPT_STATUS);
285 writel(TIFM_IRQ_SETALL, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
286 writel(TIFM_IRQ_ENABLE | TIFM_IRQ_SETALLSOCK,
287 fm->addr + FM_SET_INTERRUPT_ENABLE);
288 fm->insert_mask = 0xf;
289 spin_unlock_irqrestore(&fm->lock, flags);
290 return 0;
291 }
292
293 static int tifm_7xx1_probe(struct pci_dev *dev,
294 const struct pci_device_id *dev_id)
295 {
296 struct tifm_adapter *fm;
297 int pci_dev_busy = 0;
298 int rc;
299
300 rc = pci_set_dma_mask(dev, DMA_32BIT_MASK);
301 if (rc)
302 return rc;
303
304 rc = pci_enable_device(dev);
305 if (rc)
306 return rc;
307
308 pci_set_master(dev);
309
310 rc = pci_request_regions(dev, DRIVER_NAME);
311 if (rc) {
312 pci_dev_busy = 1;
313 goto err_out;
314 }
315
316 pci_intx(dev, 1);
317
318 fm = tifm_alloc_adapter();
319 if (!fm) {
320 rc = -ENOMEM;
321 goto err_out_int;
322 }
323
324 fm->dev = &dev->dev;
325 fm->max_sockets = (dev->device == 0x803B) ? 2 : 4;
326 fm->sockets = kzalloc(sizeof(struct tifm_dev*) * fm->max_sockets,
327 GFP_KERNEL);
328 if (!fm->sockets)
329 goto err_out_free;
330
331 INIT_WORK(&fm->media_inserter, tifm_7xx1_insert_media, fm);
332 INIT_WORK(&fm->media_remover, tifm_7xx1_remove_media, fm);
333 fm->eject = tifm_7xx1_eject;
334 pci_set_drvdata(dev, fm);
335
336 fm->addr = ioremap(pci_resource_start(dev, 0),
337 pci_resource_len(dev, 0));
338 if (!fm->addr)
339 goto err_out_free;
340
341 rc = request_irq(dev->irq, tifm_7xx1_isr, SA_SHIRQ, DRIVER_NAME, fm);
342 if (rc)
343 goto err_out_unmap;
344
345 rc = tifm_add_adapter(fm);
346 if (rc)
347 goto err_out_irq;
348
349 writel(TIFM_IRQ_SETALL, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
350 writel(TIFM_IRQ_ENABLE | TIFM_IRQ_SETALLSOCK,
351 fm->addr + FM_SET_INTERRUPT_ENABLE);
352
353 fm->insert_mask = 0xf;
354
355 return 0;
356
357 err_out_irq:
358 free_irq(dev->irq, fm);
359 err_out_unmap:
360 iounmap(fm->addr);
361 err_out_free:
362 pci_set_drvdata(dev, NULL);
363 tifm_free_adapter(fm);
364 err_out_int:
365 pci_intx(dev, 0);
366 pci_release_regions(dev);
367 err_out:
368 if (!pci_dev_busy)
369 pci_disable_device(dev);
370 return rc;
371 }
372
373 static void tifm_7xx1_remove(struct pci_dev *dev)
374 {
375 struct tifm_adapter *fm = pci_get_drvdata(dev);
376 unsigned long flags;
377
378 spin_lock_irqsave(&fm->lock, flags);
379 fm->inhibit_new_cards = 1;
380 fm->remove_mask = 0xf;
381 fm->insert_mask = 0;
382 writel(TIFM_IRQ_ENABLE, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
383 spin_unlock_irqrestore(&fm->lock, flags);
384
385 flush_workqueue(fm->wq);
386
387 tifm_7xx1_remove_media(fm);
388
389 writel(TIFM_IRQ_SETALL, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
390 free_irq(dev->irq, fm);
391
392 tifm_remove_adapter(fm);
393
394 pci_set_drvdata(dev, NULL);
395
396 iounmap(fm->addr);
397 pci_intx(dev, 0);
398 pci_release_regions(dev);
399
400 pci_disable_device(dev);
401 tifm_free_adapter(fm);
402 }
403
404 static struct pci_device_id tifm_7xx1_pci_tbl [] = {
405 { PCI_VENDOR_ID_TI, 0x8033, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
406 0 }, /* xx21 - the one I have */
407 { PCI_VENDOR_ID_TI, 0x803B, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
408 0 }, /* xx12 - should be also supported */
409 { }
410 };
411
412 static struct pci_driver tifm_7xx1_driver = {
413 .name = DRIVER_NAME,
414 .id_table = tifm_7xx1_pci_tbl,
415 .probe = tifm_7xx1_probe,
416 .remove = tifm_7xx1_remove,
417 .suspend = tifm_7xx1_suspend,
418 .resume = tifm_7xx1_resume,
419 };
420
421 static int __init tifm_7xx1_init(void)
422 {
423 return pci_register_driver(&tifm_7xx1_driver);
424 }
425
426 static void __exit tifm_7xx1_exit(void)
427 {
428 pci_unregister_driver(&tifm_7xx1_driver);
429 }
430
431 MODULE_AUTHOR("Alex Dubov");
432 MODULE_DESCRIPTION("TI FlashMedia host driver");
433 MODULE_LICENSE("GPL");
434 MODULE_DEVICE_TABLE(pci, tifm_7xx1_pci_tbl);
435 MODULE_VERSION(DRIVER_VERSION);
436
437 module_init(tifm_7xx1_init);
438 module_exit(tifm_7xx1_exit);
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