?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Merge remote-tracking branch 'moduleh/module.h-split'
[linux-2.6/next.git] / drivers / misc / tifm_7xx1.c
blobba2479022670b65d7a1326b2ba39a20550aabbaf
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 #include <linux/module.h>
15
16 #define DRIVER_NAME "tifm_7xx1"
17 #define DRIVER_VERSION "0.8"
18
19 #define TIFM_IRQ_ENABLE 0x80000000
20 #define TIFM_IRQ_SOCKMASK(x) (x)
21 #define TIFM_IRQ_CARDMASK(x) ((x) << 8)
22 #define TIFM_IRQ_FIFOMASK(x) ((x) << 16)
23 #define TIFM_IRQ_SETALL 0xffffffff
24
25 static void tifm_7xx1_dummy_eject(struct tifm_adapter *fm,
26 struct tifm_dev *sock)
27 {
28 }
29
30 static void tifm_7xx1_eject(struct tifm_adapter *fm, struct tifm_dev *sock)
31 {
32 unsigned long flags;
33
34 spin_lock_irqsave(&fm->lock, flags);
35 fm->socket_change_set |= 1 << sock->socket_id;
36 tifm_queue_work(&fm->media_switcher);
37 spin_unlock_irqrestore(&fm->lock, flags);
38 }
39
40 static irqreturn_t tifm_7xx1_isr(int irq, void *dev_id)
41 {
42 struct tifm_adapter *fm = dev_id;
43 struct tifm_dev *sock;
44 unsigned int irq_status, cnt;
45
46 spin_lock(&fm->lock);
47 irq_status = readl(fm->addr + FM_INTERRUPT_STATUS);
48 if (irq_status == 0 || irq_status == (~0)) {
49 spin_unlock(&fm->lock);
50 return IRQ_NONE;
51 }
52
53 if (irq_status & TIFM_IRQ_ENABLE) {
54 writel(TIFM_IRQ_ENABLE, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
55
56 for (cnt = 0; cnt < fm->num_sockets; cnt++) {
57 sock = fm->sockets[cnt];
58 if (sock) {
59 if ((irq_status >> cnt) & TIFM_IRQ_FIFOMASK(1))
60 sock->data_event(sock);
61 if ((irq_status >> cnt) & TIFM_IRQ_CARDMASK(1))
62 sock->card_event(sock);
63 }
64 }
65
66 fm->socket_change_set |= irq_status
67 & ((1 << fm->num_sockets) - 1);
68 }
69 writel(irq_status, fm->addr + FM_INTERRUPT_STATUS);
70
71 if (fm->finish_me)
72 complete_all(fm->finish_me);
73 else if (!fm->socket_change_set)
74 writel(TIFM_IRQ_ENABLE, fm->addr + FM_SET_INTERRUPT_ENABLE);
75 else
76 tifm_queue_work(&fm->media_switcher);
77
78 spin_unlock(&fm->lock);
79 return IRQ_HANDLED;
80 }
81
82 static unsigned char tifm_7xx1_toggle_sock_power(char __iomem *sock_addr)
83 {
84 unsigned int s_state;
85 int cnt;
86
87 writel(0x0e00, sock_addr + SOCK_CONTROL);
88
89 for (cnt = 16; cnt <= 256; cnt <<= 1) {
90 if (!(TIFM_SOCK_STATE_POWERED
91 & readl(sock_addr + SOCK_PRESENT_STATE)))
92 break;
93
94 msleep(cnt);
95 }
96
97 s_state = readl(sock_addr + SOCK_PRESENT_STATE);
98 if (!(TIFM_SOCK_STATE_OCCUPIED & s_state))
99 return 0;
100
101 writel(readl(sock_addr + SOCK_CONTROL) | TIFM_CTRL_LED,
102 sock_addr + SOCK_CONTROL);
103
104 /* xd needs some extra time before power on */
105 if (((readl(sock_addr + SOCK_PRESENT_STATE) >> 4) & 7)
106 == TIFM_TYPE_XD)
107 msleep(40);
108
109 writel((s_state & TIFM_CTRL_POWER_MASK) | 0x0c00,
110 sock_addr + SOCK_CONTROL);
111 /* wait for power to stabilize */
112 msleep(20);
113 for (cnt = 16; cnt <= 256; cnt <<= 1) {
114 if ((TIFM_SOCK_STATE_POWERED
115 & readl(sock_addr + SOCK_PRESENT_STATE)))
116 break;
117
118 msleep(cnt);
119 }
120
121 writel(readl(sock_addr + SOCK_CONTROL) & (~TIFM_CTRL_LED),
122 sock_addr + SOCK_CONTROL);
123
124 return (readl(sock_addr + SOCK_PRESENT_STATE) >> 4) & 7;
125 }
126
127 inline static void tifm_7xx1_sock_power_off(char __iomem *sock_addr)
128 {
129 writel((~TIFM_CTRL_POWER_MASK) & readl(sock_addr + SOCK_CONTROL),
130 sock_addr + SOCK_CONTROL);
131 }
132
133 inline static char __iomem *
134 tifm_7xx1_sock_addr(char __iomem *base_addr, unsigned int sock_num)
135 {
136 return base_addr + ((sock_num + 1) << 10);
137 }
138
139 static void tifm_7xx1_switch_media(struct work_struct *work)
140 {
141 struct tifm_adapter *fm = container_of(work, struct tifm_adapter,
142 media_switcher);
143 struct tifm_dev *sock;
144 char __iomem *sock_addr;
145 unsigned long flags;
146 unsigned char media_id;
147 unsigned int socket_change_set, cnt;
148
149 spin_lock_irqsave(&fm->lock, flags);
150 socket_change_set = fm->socket_change_set;
151 fm->socket_change_set = 0;
152
153 dev_dbg(fm->dev.parent, "checking media set %x\n",
154 socket_change_set);
155
156 if (!socket_change_set) {
157 spin_unlock_irqrestore(&fm->lock, flags);
158 return;
159 }
160
161 for (cnt = 0; cnt < fm->num_sockets; cnt++) {
162 if (!(socket_change_set & (1 << cnt)))
163 continue;
164 sock = fm->sockets[cnt];
165 if (sock) {
166 printk(KERN_INFO
167 "%s : demand removing card from socket %u:%u\n",
168 dev_name(&fm->dev), fm->id, cnt);
169 fm->sockets[cnt] = NULL;
170 sock_addr = sock->addr;
171 spin_unlock_irqrestore(&fm->lock, flags);
172 device_unregister(&sock->dev);
173 spin_lock_irqsave(&fm->lock, flags);
174 tifm_7xx1_sock_power_off(sock_addr);
175 writel(0x0e00, sock_addr + SOCK_CONTROL);
176 }
177
178 spin_unlock_irqrestore(&fm->lock, flags);
179
180 media_id = tifm_7xx1_toggle_sock_power(
181 tifm_7xx1_sock_addr(fm->addr, cnt));
182
183 // tifm_alloc_device will check if media_id is valid
184 sock = tifm_alloc_device(fm, cnt, media_id);
185 if (sock) {
186 sock->addr = tifm_7xx1_sock_addr(fm->addr, cnt);
187
188 if (!device_register(&sock->dev)) {
189 spin_lock_irqsave(&fm->lock, flags);
190 if (!fm->sockets[cnt]) {
191 fm->sockets[cnt] = sock;
192 sock = NULL;
193 }
194 spin_unlock_irqrestore(&fm->lock, flags);
195 }
196 if (sock)
197 tifm_free_device(&sock->dev);
198 }
199 spin_lock_irqsave(&fm->lock, flags);
200 }
201
202 writel(TIFM_IRQ_FIFOMASK(socket_change_set)
203 | TIFM_IRQ_CARDMASK(socket_change_set),
204 fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
205
206 writel(TIFM_IRQ_FIFOMASK(socket_change_set)
207 | TIFM_IRQ_CARDMASK(socket_change_set),
208 fm->addr + FM_SET_INTERRUPT_ENABLE);
209
210 writel(TIFM_IRQ_ENABLE, fm->addr + FM_SET_INTERRUPT_ENABLE);
211 spin_unlock_irqrestore(&fm->lock, flags);
212 }
213
214 #ifdef CONFIG_PM
215
216 static int tifm_7xx1_suspend(struct pci_dev *dev, pm_message_t state)
217 {
218 struct tifm_adapter *fm = pci_get_drvdata(dev);
219 int cnt;
220
221 dev_dbg(&dev->dev, "suspending host\n");
222
223 for (cnt = 0; cnt < fm->num_sockets; cnt++) {
224 if (fm->sockets[cnt])
225 tifm_7xx1_sock_power_off(fm->sockets[cnt]->addr);
226 }
227
228 pci_save_state(dev);
229 pci_enable_wake(dev, pci_choose_state(dev, state), 0);
230 pci_disable_device(dev);
231 pci_set_power_state(dev, pci_choose_state(dev, state));
232 return 0;
233 }
234
235 static int tifm_7xx1_resume(struct pci_dev *dev)
236 {
237 struct tifm_adapter *fm = pci_get_drvdata(dev);
238 int rc;
239 unsigned int good_sockets = 0, bad_sockets = 0;
240 unsigned long flags;
241 unsigned char new_ids[fm->num_sockets];
242 DECLARE_COMPLETION_ONSTACK(finish_resume);
243
244 pci_set_power_state(dev, PCI_D0);
245 pci_restore_state(dev);
246 rc = pci_enable_device(dev);
247 if (rc)
248 return rc;
249 pci_set_master(dev);
250
251 dev_dbg(&dev->dev, "resuming host\n");
252
253 for (rc = 0; rc < fm->num_sockets; rc++)
254 new_ids[rc] = tifm_7xx1_toggle_sock_power(
255 tifm_7xx1_sock_addr(fm->addr, rc));
256 spin_lock_irqsave(&fm->lock, flags);
257 for (rc = 0; rc < fm->num_sockets; rc++) {
258 if (fm->sockets[rc]) {
259 if (fm->sockets[rc]->type == new_ids[rc])
260 good_sockets |= 1 << rc;
261 else
262 bad_sockets |= 1 << rc;
263 }
264 }
265
266 writel(TIFM_IRQ_ENABLE | TIFM_IRQ_SOCKMASK((1 << fm->num_sockets) - 1),
267 fm->addr + FM_SET_INTERRUPT_ENABLE);
268 dev_dbg(&dev->dev, "change sets on resume: good %x, bad %x\n",
269 good_sockets, bad_sockets);
270
271 fm->socket_change_set = 0;
272 if (good_sockets) {
273 fm->finish_me = &finish_resume;
274 spin_unlock_irqrestore(&fm->lock, flags);
275 rc = wait_for_completion_timeout(&finish_resume, HZ);
276 dev_dbg(&dev->dev, "wait returned %d\n", rc);
277 writel(TIFM_IRQ_FIFOMASK(good_sockets)
278 | TIFM_IRQ_CARDMASK(good_sockets),
279 fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
280 writel(TIFM_IRQ_FIFOMASK(good_sockets)
281 | TIFM_IRQ_CARDMASK(good_sockets),
282 fm->addr + FM_SET_INTERRUPT_ENABLE);
283 spin_lock_irqsave(&fm->lock, flags);
284 fm->finish_me = NULL;
285 fm->socket_change_set ^= good_sockets & fm->socket_change_set;
286 }
287
288 fm->socket_change_set |= bad_sockets;
289 if (fm->socket_change_set)
290 tifm_queue_work(&fm->media_switcher);
291
292 spin_unlock_irqrestore(&fm->lock, flags);
293 writel(TIFM_IRQ_ENABLE,
294 fm->addr + FM_SET_INTERRUPT_ENABLE);
295
296 return 0;
297 }
298
299 #else
300
301 #define tifm_7xx1_suspend NULL
302 #define tifm_7xx1_resume NULL
303
304 #endif /* CONFIG_PM */
305
306 static int tifm_7xx1_dummy_has_ms_pif(struct tifm_adapter *fm,
307 struct tifm_dev *sock)
308 {
309 return 0;
310 }
311
312 static int tifm_7xx1_has_ms_pif(struct tifm_adapter *fm, struct tifm_dev *sock)
313 {
314 if (((fm->num_sockets == 4) && (sock->socket_id == 2))
315 || ((fm->num_sockets == 2) && (sock->socket_id == 0)))
316 return 1;
317
318 return 0;
319 }
320
321 static int tifm_7xx1_probe(struct pci_dev *dev,
322 const struct pci_device_id *dev_id)
323 {
324 struct tifm_adapter *fm;
325 int pci_dev_busy = 0;
326 int rc;
327
328 rc = pci_set_dma_mask(dev, DMA_BIT_MASK(32));
329 if (rc)
330 return rc;
331
332 rc = pci_enable_device(dev);
333 if (rc)
334 return rc;
335
336 pci_set_master(dev);
337
338 rc = pci_request_regions(dev, DRIVER_NAME);
339 if (rc) {
340 pci_dev_busy = 1;
341 goto err_out;
342 }
343
344 pci_intx(dev, 1);
345
346 fm = tifm_alloc_adapter(dev->device == PCI_DEVICE_ID_TI_XX21_XX11_FM
347 ? 4 : 2, &dev->dev);
348 if (!fm) {
349 rc = -ENOMEM;
350 goto err_out_int;
351 }
352
353 INIT_WORK(&fm->media_switcher, tifm_7xx1_switch_media);
354 fm->eject = tifm_7xx1_eject;
355 fm->has_ms_pif = tifm_7xx1_has_ms_pif;
356 pci_set_drvdata(dev, fm);
357
358 fm->addr = pci_ioremap_bar(dev, 0);
359 if (!fm->addr)
360 goto err_out_free;
361
362 rc = request_irq(dev->irq, tifm_7xx1_isr, IRQF_SHARED, DRIVER_NAME, fm);
363 if (rc)
364 goto err_out_unmap;
365
366 rc = tifm_add_adapter(fm);
367 if (rc)
368 goto err_out_irq;
369
370 writel(TIFM_IRQ_ENABLE | TIFM_IRQ_SOCKMASK((1 << fm->num_sockets) - 1),
371 fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
372 writel(TIFM_IRQ_ENABLE | TIFM_IRQ_SOCKMASK((1 << fm->num_sockets) - 1),
373 fm->addr + FM_SET_INTERRUPT_ENABLE);
374 return 0;
375
376 err_out_irq:
377 free_irq(dev->irq, fm);
378 err_out_unmap:
379 iounmap(fm->addr);
380 err_out_free:
381 pci_set_drvdata(dev, NULL);
382 tifm_free_adapter(fm);
383 err_out_int:
384 pci_intx(dev, 0);
385 pci_release_regions(dev);
386 err_out:
387 if (!pci_dev_busy)
388 pci_disable_device(dev);
389 return rc;
390 }
391
392 static void tifm_7xx1_remove(struct pci_dev *dev)
393 {
394 struct tifm_adapter *fm = pci_get_drvdata(dev);
395 int cnt;
396
397 fm->eject = tifm_7xx1_dummy_eject;
398 fm->has_ms_pif = tifm_7xx1_dummy_has_ms_pif;
399 writel(TIFM_IRQ_SETALL, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
400 mmiowb();
401 free_irq(dev->irq, fm);
402
403 tifm_remove_adapter(fm);
404
405 for (cnt = 0; cnt < fm->num_sockets; cnt++)
406 tifm_7xx1_sock_power_off(tifm_7xx1_sock_addr(fm->addr, cnt));
407
408 pci_set_drvdata(dev, NULL);
409
410 iounmap(fm->addr);
411 pci_intx(dev, 0);
412 pci_release_regions(dev);
413
414 pci_disable_device(dev);
415 tifm_free_adapter(fm);
416 }
417
418 static struct pci_device_id tifm_7xx1_pci_tbl [] = {
419 { PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_XX21_XX11_FM, PCI_ANY_ID,
420 PCI_ANY_ID, 0, 0, 0 }, /* xx21 - the one I have */
421 { PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_XX12_FM, PCI_ANY_ID,
422 PCI_ANY_ID, 0, 0, 0 },
423 { PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_XX20_FM, PCI_ANY_ID,
424 PCI_ANY_ID, 0, 0, 0 },
425 { }
426 };
427
428 static struct pci_driver tifm_7xx1_driver = {
429 .name = DRIVER_NAME,
430 .id_table = tifm_7xx1_pci_tbl,
431 .probe = tifm_7xx1_probe,
432 .remove = tifm_7xx1_remove,
433 .suspend = tifm_7xx1_suspend,
434 .resume = tifm_7xx1_resume,
435 };
436
437 static int __init tifm_7xx1_init(void)
438 {
439 return pci_register_driver(&tifm_7xx1_driver);
440 }
441
442 static void __exit tifm_7xx1_exit(void)
443 {
444 pci_unregister_driver(&tifm_7xx1_driver);
445 }
446
447 MODULE_AUTHOR("Alex Dubov");
448 MODULE_DESCRIPTION("TI FlashMedia host driver");
449 MODULE_LICENSE("GPL");
450 MODULE_DEVICE_TABLE(pci, tifm_7xx1_pci_tbl);
451 MODULE_VERSION(DRIVER_VERSION);
452
453 module_init(tifm_7xx1_init);
454 module_exit(tifm_7xx1_exit);
linux-next