1
2
3
4
5
6
7
8
9
10
11
12
13
14
15#include <linux/module.h>
16#include <linux/slab.h>
17#include "tpci200.h"
18
19static const u16 tpci200_status_timeout[] = {
20 TPCI200_A_TIMEOUT,
21 TPCI200_B_TIMEOUT,
22 TPCI200_C_TIMEOUT,
23 TPCI200_D_TIMEOUT,
24};
25
26static const u16 tpci200_status_error[] = {
27 TPCI200_A_ERROR,
28 TPCI200_B_ERROR,
29 TPCI200_C_ERROR,
30 TPCI200_D_ERROR,
31};
32
33static const size_t tpci200_space_size[IPACK_SPACE_COUNT] = {
34 [IPACK_IO_SPACE] = TPCI200_IO_SPACE_SIZE,
35 [IPACK_ID_SPACE] = TPCI200_ID_SPACE_SIZE,
36 [IPACK_INT_SPACE] = TPCI200_INT_SPACE_SIZE,
37 [IPACK_MEM8_SPACE] = TPCI200_MEM8_SPACE_SIZE,
38 [IPACK_MEM16_SPACE] = TPCI200_MEM16_SPACE_SIZE,
39};
40
41static const size_t tpci200_space_interval[IPACK_SPACE_COUNT] = {
42 [IPACK_IO_SPACE] = TPCI200_IO_SPACE_INTERVAL,
43 [IPACK_ID_SPACE] = TPCI200_ID_SPACE_INTERVAL,
44 [IPACK_INT_SPACE] = TPCI200_INT_SPACE_INTERVAL,
45 [IPACK_MEM8_SPACE] = TPCI200_MEM8_SPACE_INTERVAL,
46 [IPACK_MEM16_SPACE] = TPCI200_MEM16_SPACE_INTERVAL,
47};
48
49static struct tpci200_board *check_slot(struct ipack_device *dev)
50{
51 struct tpci200_board *tpci200;
52
53 if (dev == NULL)
54 return NULL;
55
56
57 tpci200 = dev_get_drvdata(dev->bus->parent);
58
59 if (tpci200 == NULL) {
60 dev_info(&dev->dev, "carrier board not found\n");
61 return NULL;
62 }
63
64 if (dev->slot >= TPCI200_NB_SLOT) {
65 dev_info(&dev->dev,
66 "Slot [%d:%d] doesn't exist! Last tpci200 slot is %d.\n",
67 dev->bus->bus_nr, dev->slot, TPCI200_NB_SLOT-1);
68 return NULL;
69 }
70
71 return tpci200;
72}
73
74static void tpci200_clear_mask(struct tpci200_board *tpci200,
75 __le16 __iomem *addr, u16 mask)
76{
77 unsigned long flags;
78 spin_lock_irqsave(&tpci200->regs_lock, flags);
79 iowrite16(ioread16(addr) & (~mask), addr);
80 spin_unlock_irqrestore(&tpci200->regs_lock, flags);
81}
82
83static void tpci200_set_mask(struct tpci200_board *tpci200,
84 __le16 __iomem *addr, u16 mask)
85{
86 unsigned long flags;
87 spin_lock_irqsave(&tpci200->regs_lock, flags);
88 iowrite16(ioread16(addr) | mask, addr);
89 spin_unlock_irqrestore(&tpci200->regs_lock, flags);
90}
91
92static void tpci200_unregister(struct tpci200_board *tpci200)
93{
94 free_irq(tpci200->info->pdev->irq, (void *) tpci200);
95
96 pci_iounmap(tpci200->info->pdev, tpci200->info->interface_regs);
97 pci_iounmap(tpci200->info->pdev, tpci200->info->cfg_regs);
98
99 pci_release_region(tpci200->info->pdev, TPCI200_IP_INTERFACE_BAR);
100 pci_release_region(tpci200->info->pdev, TPCI200_IO_ID_INT_SPACES_BAR);
101 pci_release_region(tpci200->info->pdev, TPCI200_MEM16_SPACE_BAR);
102 pci_release_region(tpci200->info->pdev, TPCI200_MEM8_SPACE_BAR);
103 pci_release_region(tpci200->info->pdev, TPCI200_CFG_MEM_BAR);
104
105 pci_disable_device(tpci200->info->pdev);
106 pci_dev_put(tpci200->info->pdev);
107}
108
109static void tpci200_enable_irq(struct tpci200_board *tpci200,
110 int islot)
111{
112 tpci200_set_mask(tpci200,
113 &tpci200->info->interface_regs->control[islot],
114 TPCI200_INT0_EN | TPCI200_INT1_EN);
115}
116
117static void tpci200_disable_irq(struct tpci200_board *tpci200,
118 int islot)
119{
120 tpci200_clear_mask(tpci200,
121 &tpci200->info->interface_regs->control[islot],
122 TPCI200_INT0_EN | TPCI200_INT1_EN);
123}
124
125static irqreturn_t tpci200_slot_irq(struct slot_irq *slot_irq)
126{
127 irqreturn_t ret;
128
129 if (!slot_irq)
130 return -ENODEV;
131 ret = slot_irq->handler(slot_irq->arg);
132
133 return ret;
134}
135
136static irqreturn_t tpci200_interrupt(int irq, void *dev_id)
137{
138 struct tpci200_board *tpci200 = (struct tpci200_board *) dev_id;
139 struct slot_irq *slot_irq;
140 irqreturn_t ret;
141 u16 status_reg;
142 int i;
143
144
145 status_reg = ioread16(&tpci200->info->interface_regs->status);
146
147
148 if (!(status_reg & TPCI200_SLOT_INT_MASK))
149 return IRQ_NONE;
150
151
152 rcu_read_lock();
153 for (i = 0; i < TPCI200_NB_SLOT; i++) {
154 if (!(status_reg & ((TPCI200_A_INT0 | TPCI200_A_INT1) << (2 * i))))
155 continue;
156 slot_irq = rcu_dereference(tpci200->slots[i].irq);
157 ret = tpci200_slot_irq(slot_irq);
158 if (ret == -ENODEV) {
159 dev_info(&tpci200->info->pdev->dev,
160 "No registered ISR for slot [%d:%d]!. IRQ will be disabled.\n",
161 tpci200->number, i);
162 tpci200_disable_irq(tpci200, i);
163 }
164 }
165 rcu_read_unlock();
166
167 return IRQ_HANDLED;
168}
169
170static int tpci200_free_irq(struct ipack_device *dev)
171{
172 struct slot_irq *slot_irq;
173 struct tpci200_board *tpci200;
174
175 tpci200 = check_slot(dev);
176 if (tpci200 == NULL)
177 return -EINVAL;
178
179 if (mutex_lock_interruptible(&tpci200->mutex))
180 return -ERESTARTSYS;
181
182 if (tpci200->slots[dev->slot].irq == NULL) {
183 mutex_unlock(&tpci200->mutex);
184 return -EINVAL;
185 }
186
187 tpci200_disable_irq(tpci200, dev->slot);
188 slot_irq = tpci200->slots[dev->slot].irq;
189
190 RCU_INIT_POINTER(tpci200->slots[dev->slot].irq, NULL);
191 synchronize_rcu();
192 kfree(slot_irq);
193 mutex_unlock(&tpci200->mutex);
194 return 0;
195}
196
197static int tpci200_request_irq(struct ipack_device *dev,
198 irqreturn_t (*handler)(void *), void *arg)
199{
200 int res = 0;
201 struct slot_irq *slot_irq;
202 struct tpci200_board *tpci200;
203
204 tpci200 = check_slot(dev);
205 if (tpci200 == NULL)
206 return -EINVAL;
207
208 if (mutex_lock_interruptible(&tpci200->mutex))
209 return -ERESTARTSYS;
210
211 if (tpci200->slots[dev->slot].irq != NULL) {
212 dev_err(&dev->dev,
213 "Slot [%d:%d] IRQ already registered !\n",
214 dev->bus->bus_nr,
215 dev->slot);
216 res = -EINVAL;
217 goto out_unlock;
218 }
219
220 slot_irq = kzalloc(sizeof(struct slot_irq), GFP_KERNEL);
221 if (slot_irq == NULL) {
222 dev_err(&dev->dev,
223 "Slot [%d:%d] unable to allocate memory for IRQ !\n",
224 dev->bus->bus_nr, dev->slot);
225 res = -ENOMEM;
226 goto out_unlock;
227 }
228
229
230
231
232
233
234
235 slot_irq->handler = handler;
236 slot_irq->arg = arg;
237 slot_irq->holder = dev;
238
239 rcu_assign_pointer(tpci200->slots[dev->slot].irq, slot_irq);
240 tpci200_enable_irq(tpci200, dev->slot);
241
242out_unlock:
243 mutex_unlock(&tpci200->mutex);
244 return res;
245}
246
247static int tpci200_register(struct tpci200_board *tpci200)
248{
249 int i;
250 int res;
251 phys_addr_t ioidint_base;
252 unsigned short slot_ctrl;
253
254 if (pci_enable_device(tpci200->info->pdev) < 0)
255 return -ENODEV;
256
257
258 res = pci_request_region(tpci200->info->pdev, TPCI200_IP_INTERFACE_BAR,
259 "Carrier IP interface registers");
260 if (res) {
261 dev_err(&tpci200->info->pdev->dev,
262 "(bn 0x%X, sn 0x%X) failed to allocate PCI resource for BAR 2 !",
263 tpci200->info->pdev->bus->number,
264 tpci200->info->pdev->devfn);
265 goto out_disable_pci;
266 }
267
268
269 res = pci_request_region(tpci200->info->pdev,
270 TPCI200_IO_ID_INT_SPACES_BAR,
271 "Carrier IO ID INT space");
272 if (res) {
273 dev_err(&tpci200->info->pdev->dev,
274 "(bn 0x%X, sn 0x%X) failed to allocate PCI resource for BAR 3 !",
275 tpci200->info->pdev->bus->number,
276 tpci200->info->pdev->devfn);
277 goto out_release_ip_space;
278 }
279
280
281 res = pci_request_region(tpci200->info->pdev, TPCI200_MEM8_SPACE_BAR,
282 "Carrier MEM8 space");
283 if (res) {
284 dev_err(&tpci200->info->pdev->dev,
285 "(bn 0x%X, sn 0x%X) failed to allocate PCI resource for BAR 5!",
286 tpci200->info->pdev->bus->number,
287 tpci200->info->pdev->devfn);
288 goto out_release_ioid_int_space;
289 }
290
291
292 res = pci_request_region(tpci200->info->pdev, TPCI200_MEM16_SPACE_BAR,
293 "Carrier MEM16 space");
294 if (res) {
295 dev_err(&tpci200->info->pdev->dev,
296 "(bn 0x%X, sn 0x%X) failed to allocate PCI resource for BAR 4!",
297 tpci200->info->pdev->bus->number,
298 tpci200->info->pdev->devfn);
299 goto out_release_mem8_space;
300 }
301
302
303 tpci200->info->interface_regs =
304 ioremap_nocache(pci_resource_start(tpci200->info->pdev,
305 TPCI200_IP_INTERFACE_BAR),
306 TPCI200_IFACE_SIZE);
307
308
309 spin_lock_init(&tpci200->regs_lock);
310
311 ioidint_base = pci_resource_start(tpci200->info->pdev,
312 TPCI200_IO_ID_INT_SPACES_BAR);
313 tpci200->mod_mem[IPACK_IO_SPACE] = ioidint_base + TPCI200_IO_SPACE_OFF;
314 tpci200->mod_mem[IPACK_ID_SPACE] = ioidint_base + TPCI200_ID_SPACE_OFF;
315 tpci200->mod_mem[IPACK_INT_SPACE] =
316 ioidint_base + TPCI200_INT_SPACE_OFF;
317 tpci200->mod_mem[IPACK_MEM8_SPACE] =
318 pci_resource_start(tpci200->info->pdev,
319 TPCI200_MEM8_SPACE_BAR);
320 tpci200->mod_mem[IPACK_MEM16_SPACE] =
321 pci_resource_start(tpci200->info->pdev,
322 TPCI200_MEM16_SPACE_BAR);
323
324
325
326
327
328
329
330
331
332 slot_ctrl = 0;
333 for (i = 0; i < TPCI200_NB_SLOT; i++)
334 writew(slot_ctrl, &tpci200->info->interface_regs->control[i]);
335
336 res = request_irq(tpci200->info->pdev->irq,
337 tpci200_interrupt, IRQF_SHARED,
338 KBUILD_MODNAME, (void *) tpci200);
339 if (res) {
340 dev_err(&tpci200->info->pdev->dev,
341 "(bn 0x%X, sn 0x%X) unable to register IRQ !",
342 tpci200->info->pdev->bus->number,
343 tpci200->info->pdev->devfn);
344 goto out_release_ioid_int_space;
345 }
346
347 return 0;
348
349out_release_mem8_space:
350 pci_release_region(tpci200->info->pdev, TPCI200_MEM8_SPACE_BAR);
351out_release_ioid_int_space:
352 pci_release_region(tpci200->info->pdev, TPCI200_IO_ID_INT_SPACES_BAR);
353out_release_ip_space:
354 pci_release_region(tpci200->info->pdev, TPCI200_IP_INTERFACE_BAR);
355out_disable_pci:
356 pci_disable_device(tpci200->info->pdev);
357 return res;
358}
359
360static int tpci200_get_clockrate(struct ipack_device *dev)
361{
362 struct tpci200_board *tpci200 = check_slot(dev);
363 __le16 __iomem *addr;
364
365 if (!tpci200)
366 return -ENODEV;
367
368 addr = &tpci200->info->interface_regs->control[dev->slot];
369 return (ioread16(addr) & TPCI200_CLK32) ? 32 : 8;
370}
371
372static int tpci200_set_clockrate(struct ipack_device *dev, int mherz)
373{
374 struct tpci200_board *tpci200 = check_slot(dev);
375 __le16 __iomem *addr;
376
377 if (!tpci200)
378 return -ENODEV;
379
380 addr = &tpci200->info->interface_regs->control[dev->slot];
381
382 switch (mherz) {
383 case 8:
384 tpci200_clear_mask(tpci200, addr, TPCI200_CLK32);
385 break;
386 case 32:
387 tpci200_set_mask(tpci200, addr, TPCI200_CLK32);
388 break;
389 default:
390 return -EINVAL;
391 }
392 return 0;
393}
394
395static int tpci200_get_error(struct ipack_device *dev)
396{
397 struct tpci200_board *tpci200 = check_slot(dev);
398 __le16 __iomem *addr;
399 u16 mask;
400
401 if (!tpci200)
402 return -ENODEV;
403
404 addr = &tpci200->info->interface_regs->status;
405 mask = tpci200_status_error[dev->slot];
406 return (ioread16(addr) & mask) ? 1 : 0;
407}
408
409static int tpci200_get_timeout(struct ipack_device *dev)
410{
411 struct tpci200_board *tpci200 = check_slot(dev);
412 __le16 __iomem *addr;
413 u16 mask;
414
415 if (!tpci200)
416 return -ENODEV;
417
418 addr = &tpci200->info->interface_regs->status;
419 mask = tpci200_status_timeout[dev->slot];
420
421 return (ioread16(addr) & mask) ? 1 : 0;
422}
423
424static int tpci200_reset_timeout(struct ipack_device *dev)
425{
426 struct tpci200_board *tpci200 = check_slot(dev);
427 __le16 __iomem *addr;
428 u16 mask;
429
430 if (!tpci200)
431 return -ENODEV;
432
433 addr = &tpci200->info->interface_regs->status;
434 mask = tpci200_status_timeout[dev->slot];
435
436 iowrite16(mask, addr);
437 return 0;
438}
439
440static void tpci200_uninstall(struct tpci200_board *tpci200)
441{
442 tpci200_unregister(tpci200);
443 kfree(tpci200->slots);
444}
445
446static const struct ipack_bus_ops tpci200_bus_ops = {
447 .request_irq = tpci200_request_irq,
448 .free_irq = tpci200_free_irq,
449 .get_clockrate = tpci200_get_clockrate,
450 .set_clockrate = tpci200_set_clockrate,
451 .get_error = tpci200_get_error,
452 .get_timeout = tpci200_get_timeout,
453 .reset_timeout = tpci200_reset_timeout,
454};
455
456static int tpci200_install(struct tpci200_board *tpci200)
457{
458 int res;
459
460 tpci200->slots = kzalloc(
461 TPCI200_NB_SLOT * sizeof(struct tpci200_slot), GFP_KERNEL);
462 if (tpci200->slots == NULL)
463 return -ENOMEM;
464
465 res = tpci200_register(tpci200);
466 if (res) {
467 kfree(tpci200->slots);
468 tpci200->slots = NULL;
469 return res;
470 }
471
472 mutex_init(&tpci200->mutex);
473 return 0;
474}
475
476static void tpci200_release_device(struct ipack_device *dev)
477{
478 kfree(dev);
479}
480
481static int tpci200_create_device(struct tpci200_board *tpci200, int i)
482{
483 int ret;
484 enum ipack_space space;
485 struct ipack_device *dev =
486 kzalloc(sizeof(struct ipack_device), GFP_KERNEL);
487 if (!dev)
488 return -ENOMEM;
489 dev->slot = i;
490 dev->bus = tpci200->info->ipack_bus;
491 dev->release = tpci200_release_device;
492
493 for (space = 0; space < IPACK_SPACE_COUNT; space++) {
494 dev->region[space].start =
495 tpci200->mod_mem[space]
496 + tpci200_space_interval[space] * i;
497 dev->region[space].size = tpci200_space_size[space];
498 }
499
500 ret = ipack_device_init(dev);
501 if (ret < 0) {
502 ipack_put_device(dev);
503 return ret;
504 }
505
506 ret = ipack_device_add(dev);
507 if (ret < 0)
508 ipack_put_device(dev);
509
510 return ret;
511}
512
513static int tpci200_pci_probe(struct pci_dev *pdev,
514 const struct pci_device_id *id)
515{
516 int ret, i;
517 struct tpci200_board *tpci200;
518 u32 reg32;
519
520 tpci200 = kzalloc(sizeof(struct tpci200_board), GFP_KERNEL);
521 if (!tpci200)
522 return -ENOMEM;
523
524 tpci200->info = kzalloc(sizeof(struct tpci200_infos), GFP_KERNEL);
525 if (!tpci200->info) {
526 ret = -ENOMEM;
527 goto out_err_info;
528 }
529
530 pci_dev_get(pdev);
531
532
533 ret = pci_request_region(pdev, TPCI200_CFG_MEM_BAR,
534 KBUILD_MODNAME " Configuration Memory");
535 if (ret) {
536 dev_err(&pdev->dev, "Failed to allocate PCI Configuration Memory");
537 ret = -EBUSY;
538 goto out_err_pci_request;
539 }
540 tpci200->info->cfg_regs = ioremap_nocache(
541 pci_resource_start(pdev, TPCI200_CFG_MEM_BAR),
542 pci_resource_len(pdev, TPCI200_CFG_MEM_BAR));
543 if (!tpci200->info->cfg_regs) {
544 dev_err(&pdev->dev, "Failed to map PCI Configuration Memory");
545 ret = -EFAULT;
546 goto out_err_ioremap;
547 }
548
549
550
551
552 reg32 = ioread32(tpci200->info->cfg_regs + LAS1_DESC);
553 reg32 |= 1 << LAS_BIT_BIGENDIAN;
554 iowrite32(reg32, tpci200->info->cfg_regs + LAS1_DESC);
555
556 reg32 = ioread32(tpci200->info->cfg_regs + LAS2_DESC);
557 reg32 |= 1 << LAS_BIT_BIGENDIAN;
558 iowrite32(reg32, tpci200->info->cfg_regs + LAS2_DESC);
559
560
561 tpci200->info->pdev = pdev;
562 tpci200->info->id_table = (struct pci_device_id *)id;
563
564
565 ret = tpci200_install(tpci200);
566 if (ret) {
567 dev_err(&pdev->dev, "error during tpci200 install\n");
568 ret = -ENODEV;
569 goto out_err_install;
570 }
571
572
573 tpci200->info->ipack_bus = ipack_bus_register(&pdev->dev,
574 TPCI200_NB_SLOT,
575 &tpci200_bus_ops,
576 THIS_MODULE);
577 if (!tpci200->info->ipack_bus) {
578 dev_err(&pdev->dev,
579 "error registering the carrier on ipack driver\n");
580 ret = -EFAULT;
581 goto out_err_bus_register;
582 }
583
584
585 tpci200->number = tpci200->info->ipack_bus->bus_nr;
586 dev_set_drvdata(&pdev->dev, tpci200);
587
588 for (i = 0; i < TPCI200_NB_SLOT; i++)
589 tpci200_create_device(tpci200, i);
590 return 0;
591
592out_err_bus_register:
593 tpci200_uninstall(tpci200);
594out_err_install:
595 iounmap(tpci200->info->cfg_regs);
596out_err_ioremap:
597 pci_release_region(pdev, TPCI200_CFG_MEM_BAR);
598out_err_pci_request:
599 pci_dev_put(pdev);
600 kfree(tpci200->info);
601out_err_info:
602 kfree(tpci200);
603 return ret;
604}
605
606static void __tpci200_pci_remove(struct tpci200_board *tpci200)
607{
608 ipack_bus_unregister(tpci200->info->ipack_bus);
609 tpci200_uninstall(tpci200);
610
611 kfree(tpci200->info);
612 kfree(tpci200);
613}
614
615static void tpci200_pci_remove(struct pci_dev *dev)
616{
617 struct tpci200_board *tpci200 = pci_get_drvdata(dev);
618
619 __tpci200_pci_remove(tpci200);
620}
621
622static const struct pci_device_id tpci200_idtable[] = {
623 { TPCI200_VENDOR_ID, TPCI200_DEVICE_ID, TPCI200_SUBVENDOR_ID,
624 TPCI200_SUBDEVICE_ID },
625 { 0, },
626};
627
628MODULE_DEVICE_TABLE(pci, tpci200_idtable);
629
630static struct pci_driver tpci200_pci_drv = {
631 .name = "tpci200",
632 .id_table = tpci200_idtable,
633 .probe = tpci200_pci_probe,
634 .remove = tpci200_pci_remove,
635};
636
637module_pci_driver(tpci200_pci_drv);
638
639MODULE_DESCRIPTION("TEWS TPCI-200 device driver");
640MODULE_LICENSE("GPL");
641
