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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
25static void tifm_7xx1_dummy_eject(struct tifm_adapter *fm,
26 struct tifm_dev *sock)
27{
28}
29
30static 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
40static 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
82static 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
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
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
127inline 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
133inline static char __iomem *
134tifm_7xx1_sock_addr(char __iomem *base_addr, unsigned int sock_num)
135{
136 return base_addr + ((sock_num + 1) << 10);
137}
138
139static 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
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
216static 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
235static int tifm_7xx1_resume(struct pci_dev *dev)
236{
237 struct tifm_adapter *fm = pci_get_drvdata(dev);
238 int rc;
239 unsigned long timeout;
240 unsigned int good_sockets = 0, bad_sockets = 0;
241 unsigned long flags;
242
243 unsigned char new_ids[4];
244 DECLARE_COMPLETION_ONSTACK(finish_resume);
245
246 if (WARN_ON(fm->num_sockets > ARRAY_SIZE(new_ids)))
247 return -ENXIO;
248
249 pci_set_power_state(dev, PCI_D0);
250 pci_restore_state(dev);
251 rc = pci_enable_device(dev);
252 if (rc)
253 return rc;
254 pci_set_master(dev);
255
256 dev_dbg(&dev->dev, "resuming host\n");
257
258 for (rc = 0; rc < fm->num_sockets; rc++)
259 new_ids[rc] = tifm_7xx1_toggle_sock_power(
260 tifm_7xx1_sock_addr(fm->addr, rc));
261 spin_lock_irqsave(&fm->lock, flags);
262 for (rc = 0; rc < fm->num_sockets; rc++) {
263 if (fm->sockets[rc]) {
264 if (fm->sockets[rc]->type == new_ids[rc])
265 good_sockets |= 1 << rc;
266 else
267 bad_sockets |= 1 << rc;
268 }
269 }
270
271 writel(TIFM_IRQ_ENABLE | TIFM_IRQ_SOCKMASK((1 << fm->num_sockets) - 1),
272 fm->addr + FM_SET_INTERRUPT_ENABLE);
273 dev_dbg(&dev->dev, "change sets on resume: good %x, bad %x\n",
274 good_sockets, bad_sockets);
275
276 fm->socket_change_set = 0;
277 if (good_sockets) {
278 fm->finish_me = &finish_resume;
279 spin_unlock_irqrestore(&fm->lock, flags);
280 timeout = wait_for_completion_timeout(&finish_resume, HZ);
281 dev_dbg(&dev->dev, "wait returned %lu\n", timeout);
282 writel(TIFM_IRQ_FIFOMASK(good_sockets)
283 | TIFM_IRQ_CARDMASK(good_sockets),
284 fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
285 writel(TIFM_IRQ_FIFOMASK(good_sockets)
286 | TIFM_IRQ_CARDMASK(good_sockets),
287 fm->addr + FM_SET_INTERRUPT_ENABLE);
288 spin_lock_irqsave(&fm->lock, flags);
289 fm->finish_me = NULL;
290 fm->socket_change_set ^= good_sockets & fm->socket_change_set;
291 }
292
293 fm->socket_change_set |= bad_sockets;
294 if (fm->socket_change_set)
295 tifm_queue_work(&fm->media_switcher);
296
297 spin_unlock_irqrestore(&fm->lock, flags);
298 writel(TIFM_IRQ_ENABLE,
299 fm->addr + FM_SET_INTERRUPT_ENABLE);
300
301 return 0;
302}
303
304#else
305
306#define tifm_7xx1_suspend NULL
307#define tifm_7xx1_resume NULL
308
309#endif
310
311static int tifm_7xx1_dummy_has_ms_pif(struct tifm_adapter *fm,
312 struct tifm_dev *sock)
313{
314 return 0;
315}
316
317static int tifm_7xx1_has_ms_pif(struct tifm_adapter *fm, struct tifm_dev *sock)
318{
319 if (((fm->num_sockets == 4) && (sock->socket_id == 2))
320 || ((fm->num_sockets == 2) && (sock->socket_id == 0)))
321 return 1;
322
323 return 0;
324}
325
326static int tifm_7xx1_probe(struct pci_dev *dev,
327 const struct pci_device_id *dev_id)
328{
329 struct tifm_adapter *fm;
330 int pci_dev_busy = 0;
331 int rc;
332
333 rc = pci_set_dma_mask(dev, DMA_BIT_MASK(32));
334 if (rc)
335 return rc;
336
337 rc = pci_enable_device(dev);
338 if (rc)
339 return rc;
340
341 pci_set_master(dev);
342
343 rc = pci_request_regions(dev, DRIVER_NAME);
344 if (rc) {
345 pci_dev_busy = 1;
346 goto err_out;
347 }
348
349 pci_intx(dev, 1);
350
351 fm = tifm_alloc_adapter(dev->device == PCI_DEVICE_ID_TI_XX21_XX11_FM
352 ? 4 : 2, &dev->dev);
353 if (!fm) {
354 rc = -ENOMEM;
355 goto err_out_int;
356 }
357
358 INIT_WORK(&fm->media_switcher, tifm_7xx1_switch_media);
359 fm->eject = tifm_7xx1_eject;
360 fm->has_ms_pif = tifm_7xx1_has_ms_pif;
361 pci_set_drvdata(dev, fm);
362
363 fm->addr = pci_ioremap_bar(dev, 0);
364 if (!fm->addr) {
365 rc = -ENODEV;
366 goto err_out_free;
367 }
368
369 rc = request_irq(dev->irq, tifm_7xx1_isr, IRQF_SHARED, DRIVER_NAME, fm);
370 if (rc)
371 goto err_out_unmap;
372
373 rc = tifm_add_adapter(fm);
374 if (rc)
375 goto err_out_irq;
376
377 writel(TIFM_IRQ_ENABLE | TIFM_IRQ_SOCKMASK((1 << fm->num_sockets) - 1),
378 fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
379 writel(TIFM_IRQ_ENABLE | TIFM_IRQ_SOCKMASK((1 << fm->num_sockets) - 1),
380 fm->addr + FM_SET_INTERRUPT_ENABLE);
381 return 0;
382
383err_out_irq:
384 free_irq(dev->irq, fm);
385err_out_unmap:
386 iounmap(fm->addr);
387err_out_free:
388 tifm_free_adapter(fm);
389err_out_int:
390 pci_intx(dev, 0);
391 pci_release_regions(dev);
392err_out:
393 if (!pci_dev_busy)
394 pci_disable_device(dev);
395 return rc;
396}
397
398static void tifm_7xx1_remove(struct pci_dev *dev)
399{
400 struct tifm_adapter *fm = pci_get_drvdata(dev);
401 int cnt;
402
403 fm->eject = tifm_7xx1_dummy_eject;
404 fm->has_ms_pif = tifm_7xx1_dummy_has_ms_pif;
405 writel(TIFM_IRQ_SETALL, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
406 free_irq(dev->irq, fm);
407
408 tifm_remove_adapter(fm);
409
410 for (cnt = 0; cnt < fm->num_sockets; cnt++)
411 tifm_7xx1_sock_power_off(tifm_7xx1_sock_addr(fm->addr, cnt));
412
413 iounmap(fm->addr);
414 pci_intx(dev, 0);
415 pci_release_regions(dev);
416
417 pci_disable_device(dev);
418 tifm_free_adapter(fm);
419}
420
421static const struct pci_device_id tifm_7xx1_pci_tbl[] = {
422 { PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_XX21_XX11_FM, PCI_ANY_ID,
423 PCI_ANY_ID, 0, 0, 0 },
424 { PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_XX12_FM, PCI_ANY_ID,
425 PCI_ANY_ID, 0, 0, 0 },
426 { PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_XX20_FM, PCI_ANY_ID,
427 PCI_ANY_ID, 0, 0, 0 },
428 { }
429};
430
431static struct pci_driver tifm_7xx1_driver = {
432 .name = DRIVER_NAME,
433 .id_table = tifm_7xx1_pci_tbl,
434 .probe = tifm_7xx1_probe,
435 .remove = tifm_7xx1_remove,
436 .suspend = tifm_7xx1_suspend,
437 .resume = tifm_7xx1_resume,
438};
439
440module_pci_driver(tifm_7xx1_driver);
441MODULE_AUTHOR("Alex Dubov");
442MODULE_DESCRIPTION("TI FlashMedia host driver");
443MODULE_LICENSE("GPL");
444MODULE_DEVICE_TABLE(pci, tifm_7xx1_pci_tbl);
445MODULE_VERSION(DRIVER_VERSION);
446
