tifm_sd: restructure initialization, removal and command handling
[linux-2.6.git] / drivers / misc / tifm_7xx1.c
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(struct work_struct *work)
37 {
38         struct tifm_adapter *fm =
39                 container_of(work, struct tifm_adapter, media_remover);
40         unsigned long flags;
41         int cnt;
42         struct tifm_dev *sock;
43
44         if (!class_device_get(&fm->cdev))
45                 return;
46         spin_lock_irqsave(&fm->lock, flags);
47         for (cnt = 0; cnt < fm->max_sockets; cnt++) {
48                 if (fm->sockets[cnt] && (fm->remove_mask & (1 << cnt))) {
49                         printk(KERN_INFO DRIVER_NAME
50                                ": demand removing card from socket %d\n", cnt);
51                         sock = fm->sockets[cnt];
52                         fm->sockets[cnt] = NULL;
53                         fm->remove_mask &= ~(1 << cnt);
54
55                         writel(0x0e00, sock->addr + SOCK_CONTROL);
56
57                         writel((TIFM_IRQ_FIFOMASK | TIFM_IRQ_CARDMASK) << cnt,
58                                 fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
59                         writel((TIFM_IRQ_FIFOMASK | TIFM_IRQ_CARDMASK) << cnt,
60                                 fm->addr + FM_SET_INTERRUPT_ENABLE);
61
62                         spin_unlock_irqrestore(&fm->lock, flags);
63                         device_unregister(&sock->dev);
64                         spin_lock_irqsave(&fm->lock, flags);
65                 }
66         }
67         spin_unlock_irqrestore(&fm->lock, flags);
68         class_device_put(&fm->cdev);
69 }
70
71 static irqreturn_t tifm_7xx1_isr(int irq, void *dev_id)
72 {
73         struct tifm_adapter *fm = dev_id;
74         unsigned int irq_status;
75         unsigned int sock_irq_status, cnt;
76
77         spin_lock(&fm->lock);
78         irq_status = readl(fm->addr + FM_INTERRUPT_STATUS);
79         if (irq_status == 0 || irq_status == (~0)) {
80                 spin_unlock(&fm->lock);
81                 return IRQ_NONE;
82         }
83
84         if (irq_status & TIFM_IRQ_ENABLE) {
85                 writel(TIFM_IRQ_ENABLE, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
86
87                 for (cnt = 0; cnt <  fm->max_sockets; cnt++) {
88                         sock_irq_status = (irq_status >> cnt) &
89                                         (TIFM_IRQ_FIFOMASK | TIFM_IRQ_CARDMASK);
90
91                         if (fm->sockets[cnt]) {
92                                 if (sock_irq_status &&
93                                                 fm->sockets[cnt]->signal_irq)
94                                         sock_irq_status = fm->sockets[cnt]->
95                                                 signal_irq(fm->sockets[cnt],
96                                                         sock_irq_status);
97
98                                 if (irq_status & (1 << cnt))
99                                         fm->remove_mask |= 1 << cnt;
100                         } else {
101                                 if (irq_status & (1 << cnt))
102                                         fm->insert_mask |= 1 << cnt;
103                         }
104                 }
105         }
106         writel(irq_status, fm->addr + FM_INTERRUPT_STATUS);
107
108         if (!fm->inhibit_new_cards) {
109                 if (!fm->remove_mask && !fm->insert_mask) {
110                         writel(TIFM_IRQ_ENABLE,
111                                 fm->addr + FM_SET_INTERRUPT_ENABLE);
112                 } else {
113                         queue_work(fm->wq, &fm->media_remover);
114                         queue_work(fm->wq, &fm->media_inserter);
115                 }
116         }
117
118         spin_unlock(&fm->lock);
119         return IRQ_HANDLED;
120 }
121
122 static tifm_media_id tifm_7xx1_toggle_sock_power(char __iomem *sock_addr, int is_x2)
123 {
124         unsigned int s_state;
125         int cnt;
126
127         writel(0x0e00, sock_addr + SOCK_CONTROL);
128
129         for (cnt = 0; cnt < 100; cnt++) {
130                 if (!(TIFM_SOCK_STATE_POWERED &
131                                 readl(sock_addr + SOCK_PRESENT_STATE)))
132                         break;
133                 msleep(10);
134         }
135
136         s_state = readl(sock_addr + SOCK_PRESENT_STATE);
137         if (!(TIFM_SOCK_STATE_OCCUPIED & s_state))
138                 return FM_NULL;
139
140         if (is_x2) {
141                 writel((s_state & 7) | 0x0c00, sock_addr + SOCK_CONTROL);
142         } else {
143                 // SmartMedia cards need extra 40 msec
144                 if (((readl(sock_addr + SOCK_PRESENT_STATE) >> 4) & 7) == 1)
145                         msleep(40);
146                 writel(readl(sock_addr + SOCK_CONTROL) | TIFM_CTRL_LED,
147                        sock_addr + SOCK_CONTROL);
148                 msleep(10);
149                 writel((s_state & 0x7) | 0x0c00 | TIFM_CTRL_LED,
150                         sock_addr + SOCK_CONTROL);
151         }
152
153         for (cnt = 0; cnt < 100; cnt++) {
154                 if ((TIFM_SOCK_STATE_POWERED &
155                                 readl(sock_addr + SOCK_PRESENT_STATE)))
156                         break;
157                 msleep(10);
158         }
159
160         if (!is_x2)
161                 writel(readl(sock_addr + SOCK_CONTROL) & (~TIFM_CTRL_LED),
162                        sock_addr + SOCK_CONTROL);
163
164         return (readl(sock_addr + SOCK_PRESENT_STATE) >> 4) & 7;
165 }
166
167 inline static char __iomem *
168 tifm_7xx1_sock_addr(char __iomem *base_addr, unsigned int sock_num)
169 {
170         return base_addr + ((sock_num + 1) << 10);
171 }
172
173 static void tifm_7xx1_insert_media(struct work_struct *work)
174 {
175         struct tifm_adapter *fm =
176                 container_of(work, struct tifm_adapter, media_inserter);
177         unsigned long flags;
178         tifm_media_id media_id;
179         char *card_name = "xx";
180         int cnt, ok_to_register;
181         unsigned int insert_mask;
182         struct tifm_dev *new_sock = NULL;
183
184         if (!class_device_get(&fm->cdev))
185                 return;
186         spin_lock_irqsave(&fm->lock, flags);
187         insert_mask = fm->insert_mask;
188         fm->insert_mask = 0;
189         if (fm->inhibit_new_cards) {
190                 spin_unlock_irqrestore(&fm->lock, flags);
191                 class_device_put(&fm->cdev);
192                 return;
193         }
194         spin_unlock_irqrestore(&fm->lock, flags);
195
196         for (cnt = 0; cnt < fm->max_sockets; cnt++) {
197                 if (!(insert_mask & (1 << cnt)))
198                         continue;
199
200                 media_id = tifm_7xx1_toggle_sock_power(tifm_7xx1_sock_addr(fm->addr, cnt),
201                                                        fm->max_sockets == 2);
202                 if (media_id) {
203                         ok_to_register = 0;
204                         new_sock = tifm_alloc_device(fm);
205                         if (new_sock) {
206                                 new_sock->addr = tifm_7xx1_sock_addr(fm->addr,
207                                                                         cnt);
208                                 new_sock->media_id = media_id;
209                                 new_sock->socket_id = cnt;
210                                 switch (media_id) {
211                                 case 1:
212                                         card_name = "xd";
213                                         break;
214                                 case 2:
215                                         card_name = "ms";
216                                         break;
217                                 case 3:
218                                         card_name = "sd";
219                                         break;
220                                 default:
221                                         break;
222                                 }
223                                 snprintf(new_sock->dev.bus_id, BUS_ID_SIZE,
224                                         "tifm_%s%u:%u", card_name, fm->id, cnt);
225                                 printk(KERN_INFO DRIVER_NAME
226                                         ": %s card detected in socket %d\n",
227                                         card_name, cnt);
228                                 spin_lock_irqsave(&fm->lock, flags);
229                                 if (!fm->sockets[cnt]) {
230                                         fm->sockets[cnt] = new_sock;
231                                         ok_to_register = 1;
232                                 }
233                                 spin_unlock_irqrestore(&fm->lock, flags);
234                                 if (!ok_to_register ||
235                                             device_register(&new_sock->dev)) {
236                                         spin_lock_irqsave(&fm->lock, flags);
237                                         fm->sockets[cnt] = NULL;
238                                         spin_unlock_irqrestore(&fm->lock,
239                                                                 flags);
240                                         tifm_free_device(&new_sock->dev);
241                                 }
242                         }
243                 }
244                 writel((TIFM_IRQ_FIFOMASK | TIFM_IRQ_CARDMASK) << cnt,
245                        fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
246                 writel((TIFM_IRQ_FIFOMASK | TIFM_IRQ_CARDMASK) << cnt,
247                        fm->addr + FM_SET_INTERRUPT_ENABLE);
248         }
249
250         writel(TIFM_IRQ_ENABLE, fm->addr + FM_SET_INTERRUPT_ENABLE);
251         class_device_put(&fm->cdev);
252 }
253
254 static int tifm_7xx1_suspend(struct pci_dev *dev, pm_message_t state)
255 {
256         struct tifm_adapter *fm = pci_get_drvdata(dev);
257         unsigned long flags;
258
259         spin_lock_irqsave(&fm->lock, flags);
260         fm->inhibit_new_cards = 1;
261         fm->remove_mask = 0xf;
262         fm->insert_mask = 0;
263         writel(TIFM_IRQ_ENABLE, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
264         spin_unlock_irqrestore(&fm->lock, flags);
265         flush_workqueue(fm->wq);
266
267         tifm_7xx1_remove_media(&fm->media_remover);
268
269         pci_set_power_state(dev, PCI_D3hot);
270         pci_disable_device(dev);
271         pci_save_state(dev);
272         return 0;
273 }
274
275 static int tifm_7xx1_resume(struct pci_dev *dev)
276 {
277         struct tifm_adapter *fm = pci_get_drvdata(dev);
278         unsigned long flags;
279
280         pci_restore_state(dev);
281         pci_enable_device(dev);
282         pci_set_power_state(dev, PCI_D0);
283         pci_set_master(dev);
284
285         spin_lock_irqsave(&fm->lock, flags);
286         fm->inhibit_new_cards = 0;
287         writel(TIFM_IRQ_SETALL, fm->addr + FM_INTERRUPT_STATUS);
288         writel(TIFM_IRQ_SETALL, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
289         writel(TIFM_IRQ_ENABLE | TIFM_IRQ_SETALLSOCK,
290                 fm->addr + FM_SET_INTERRUPT_ENABLE);
291         fm->insert_mask = 0xf;
292         spin_unlock_irqrestore(&fm->lock, flags);
293         return 0;
294 }
295
296 static int tifm_7xx1_probe(struct pci_dev *dev,
297                         const struct pci_device_id *dev_id)
298 {
299         struct tifm_adapter *fm;
300         int pci_dev_busy = 0;
301         int rc;
302
303         rc = pci_set_dma_mask(dev, DMA_32BIT_MASK);
304         if (rc)
305                 return rc;
306
307         rc = pci_enable_device(dev);
308         if (rc)
309                 return rc;
310
311         pci_set_master(dev);
312
313         rc = pci_request_regions(dev, DRIVER_NAME);
314         if (rc) {
315                 pci_dev_busy = 1;
316                 goto err_out;
317         }
318
319         pci_intx(dev, 1);
320
321         fm = tifm_alloc_adapter();
322         if (!fm) {
323                 rc = -ENOMEM;
324                 goto err_out_int;
325         }
326
327         fm->dev = &dev->dev;
328         fm->max_sockets = (dev->device == 0x803B) ? 2 : 4;
329         fm->sockets = kzalloc(sizeof(struct tifm_dev*) * fm->max_sockets,
330                                 GFP_KERNEL);
331         if (!fm->sockets)
332                 goto err_out_free;
333
334         INIT_WORK(&fm->media_inserter, tifm_7xx1_insert_media);
335         INIT_WORK(&fm->media_remover, tifm_7xx1_remove_media);
336         fm->eject = tifm_7xx1_eject;
337         pci_set_drvdata(dev, fm);
338
339         fm->addr = ioremap(pci_resource_start(dev, 0),
340                                 pci_resource_len(dev, 0));
341         if (!fm->addr)
342                 goto err_out_free;
343
344         rc = request_irq(dev->irq, tifm_7xx1_isr, SA_SHIRQ, DRIVER_NAME, fm);
345         if (rc)
346                 goto err_out_unmap;
347
348         rc = tifm_add_adapter(fm);
349         if (rc)
350                 goto err_out_irq;
351
352         writel(TIFM_IRQ_SETALL, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
353         writel(TIFM_IRQ_ENABLE | TIFM_IRQ_SETALLSOCK,
354                 fm->addr + FM_SET_INTERRUPT_ENABLE);
355
356         fm->insert_mask = 0xf;
357
358         return 0;
359
360 err_out_irq:
361         free_irq(dev->irq, fm);
362 err_out_unmap:
363         iounmap(fm->addr);
364 err_out_free:
365         pci_set_drvdata(dev, NULL);
366         tifm_free_adapter(fm);
367 err_out_int:
368         pci_intx(dev, 0);
369         pci_release_regions(dev);
370 err_out:
371         if (!pci_dev_busy)
372                 pci_disable_device(dev);
373         return rc;
374 }
375
376 static void tifm_7xx1_remove(struct pci_dev *dev)
377 {
378         struct tifm_adapter *fm = pci_get_drvdata(dev);
379         unsigned long flags;
380
381         spin_lock_irqsave(&fm->lock, flags);
382         fm->inhibit_new_cards = 1;
383         fm->remove_mask = 0xf;
384         fm->insert_mask = 0;
385         writel(TIFM_IRQ_ENABLE, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
386         spin_unlock_irqrestore(&fm->lock, flags);
387
388         flush_workqueue(fm->wq);
389
390         tifm_7xx1_remove_media(&fm->media_remover);
391
392         writel(TIFM_IRQ_SETALL, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
393         free_irq(dev->irq, fm);
394
395         tifm_remove_adapter(fm);
396
397         pci_set_drvdata(dev, NULL);
398
399         iounmap(fm->addr);
400         pci_intx(dev, 0);
401         pci_release_regions(dev);
402
403         pci_disable_device(dev);
404         tifm_free_adapter(fm);
405 }
406
407 static struct pci_device_id tifm_7xx1_pci_tbl [] = {
408         { PCI_VENDOR_ID_TI, 0x8033, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
409           0 }, /* xx21 - the one I have */
410         { PCI_VENDOR_ID_TI, 0x803B, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
411           0 }, /* xx12 - should be also supported */
412         { }
413 };
414
415 static struct pci_driver tifm_7xx1_driver = {
416         .name = DRIVER_NAME,
417         .id_table = tifm_7xx1_pci_tbl,
418         .probe = tifm_7xx1_probe,
419         .remove = tifm_7xx1_remove,
420         .suspend = tifm_7xx1_suspend,
421         .resume = tifm_7xx1_resume,
422 };
423
424 static int __init tifm_7xx1_init(void)
425 {
426         return pci_register_driver(&tifm_7xx1_driver);
427 }
428
429 static void __exit tifm_7xx1_exit(void)
430 {
431         pci_unregister_driver(&tifm_7xx1_driver);
432 }
433
434 MODULE_AUTHOR("Alex Dubov");
435 MODULE_DESCRIPTION("TI FlashMedia host driver");
436 MODULE_LICENSE("GPL");
437 MODULE_DEVICE_TABLE(pci, tifm_7xx1_pci_tbl);
438 MODULE_VERSION(DRIVER_VERSION);
439
440 module_init(tifm_7xx1_init);
441 module_exit(tifm_7xx1_exit);