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12#include <linux/module.h>
13#include <linux/slab.h>
14#include "tpci200.h"
15
16static const u16 tpci200_status_timeout[] = {
17 TPCI200_A_TIMEOUT,
18 TPCI200_B_TIMEOUT,
19 TPCI200_C_TIMEOUT,
20 TPCI200_D_TIMEOUT,
21};
22
23static const u16 tpci200_status_error[] = {
24 TPCI200_A_ERROR,
25 TPCI200_B_ERROR,
26 TPCI200_C_ERROR,
27 TPCI200_D_ERROR,
28};
29
30static const size_t tpci200_space_size[IPACK_SPACE_COUNT] = {
31 [IPACK_IO_SPACE] = TPCI200_IO_SPACE_SIZE,
32 [IPACK_ID_SPACE] = TPCI200_ID_SPACE_SIZE,
33 [IPACK_INT_SPACE] = TPCI200_INT_SPACE_SIZE,
34 [IPACK_MEM8_SPACE] = TPCI200_MEM8_SPACE_SIZE,
35 [IPACK_MEM16_SPACE] = TPCI200_MEM16_SPACE_SIZE,
36};
37
38static const size_t tpci200_space_interval[IPACK_SPACE_COUNT] = {
39 [IPACK_IO_SPACE] = TPCI200_IO_SPACE_INTERVAL,
40 [IPACK_ID_SPACE] = TPCI200_ID_SPACE_INTERVAL,
41 [IPACK_INT_SPACE] = TPCI200_INT_SPACE_INTERVAL,
42 [IPACK_MEM8_SPACE] = TPCI200_MEM8_SPACE_INTERVAL,
43 [IPACK_MEM16_SPACE] = TPCI200_MEM16_SPACE_INTERVAL,
44};
45
46static struct tpci200_board *check_slot(struct ipack_device *dev)
47{
48 struct tpci200_board *tpci200;
49
50 if (dev == NULL)
51 return NULL;
52
53
54 tpci200 = dev_get_drvdata(dev->bus->parent);
55
56 if (tpci200 == NULL) {
57 dev_info(&dev->dev, "carrier board not found\n");
58 return NULL;
59 }
60
61 if (dev->slot >= TPCI200_NB_SLOT) {
62 dev_info(&dev->dev,
63 "Slot [%d:%d] doesn't exist! Last tpci200 slot is %d.\n",
64 dev->bus->bus_nr, dev->slot, TPCI200_NB_SLOT-1);
65 return NULL;
66 }
67
68 return tpci200;
69}
70
71static void tpci200_clear_mask(struct tpci200_board *tpci200,
72 __le16 __iomem *addr, u16 mask)
73{
74 unsigned long flags;
75 spin_lock_irqsave(&tpci200->regs_lock, flags);
76 iowrite16(ioread16(addr) & (~mask), addr);
77 spin_unlock_irqrestore(&tpci200->regs_lock, flags);
78}
79
80static void tpci200_set_mask(struct tpci200_board *tpci200,
81 __le16 __iomem *addr, u16 mask)
82{
83 unsigned long flags;
84 spin_lock_irqsave(&tpci200->regs_lock, flags);
85 iowrite16(ioread16(addr) | mask, addr);
86 spin_unlock_irqrestore(&tpci200->regs_lock, flags);
87}
88
89static void tpci200_unregister(struct tpci200_board *tpci200)
90{
91 free_irq(tpci200->info->pdev->irq, (void *) tpci200);
92
93 pci_iounmap(tpci200->info->pdev, tpci200->info->interface_regs);
94 pci_iounmap(tpci200->info->pdev, tpci200->info->cfg_regs);
95
96 pci_release_region(tpci200->info->pdev, TPCI200_IP_INTERFACE_BAR);
97 pci_release_region(tpci200->info->pdev, TPCI200_IO_ID_INT_SPACES_BAR);
98 pci_release_region(tpci200->info->pdev, TPCI200_MEM16_SPACE_BAR);
99 pci_release_region(tpci200->info->pdev, TPCI200_MEM8_SPACE_BAR);
100 pci_release_region(tpci200->info->pdev, TPCI200_CFG_MEM_BAR);
101
102 pci_disable_device(tpci200->info->pdev);
103 pci_dev_put(tpci200->info->pdev);
104}
105
106static void tpci200_enable_irq(struct tpci200_board *tpci200,
107 int islot)
108{
109 tpci200_set_mask(tpci200,
110 &tpci200->info->interface_regs->control[islot],
111 TPCI200_INT0_EN | TPCI200_INT1_EN);
112}
113
114static void tpci200_disable_irq(struct tpci200_board *tpci200,
115 int islot)
116{
117 tpci200_clear_mask(tpci200,
118 &tpci200->info->interface_regs->control[islot],
119 TPCI200_INT0_EN | TPCI200_INT1_EN);
120}
121
122static irqreturn_t tpci200_slot_irq(struct slot_irq *slot_irq)
123{
124 irqreturn_t ret;
125
126 if (!slot_irq)
127 return -ENODEV;
128 ret = slot_irq->handler(slot_irq->arg);
129
130 return ret;
131}
132
133static irqreturn_t tpci200_interrupt(int irq, void *dev_id)
134{
135 struct tpci200_board *tpci200 = (struct tpci200_board *) dev_id;
136 struct slot_irq *slot_irq;
137 irqreturn_t ret;
138 u16 status_reg;
139 int i;
140
141
142 status_reg = ioread16(&tpci200->info->interface_regs->status);
143
144
145 if (!(status_reg & TPCI200_SLOT_INT_MASK))
146 return IRQ_NONE;
147
148
149 rcu_read_lock();
150 for (i = 0; i < TPCI200_NB_SLOT; i++) {
151 if (!(status_reg & ((TPCI200_A_INT0 | TPCI200_A_INT1) << (2 * i))))
152 continue;
153 slot_irq = rcu_dereference(tpci200->slots[i].irq);
154 ret = tpci200_slot_irq(slot_irq);
155 if (ret == -ENODEV) {
156 dev_info(&tpci200->info->pdev->dev,
157 "No registered ISR for slot [%d:%d]!. IRQ will be disabled.\n",
158 tpci200->number, i);
159 tpci200_disable_irq(tpci200, i);
160 }
161 }
162 rcu_read_unlock();
163
164 return IRQ_HANDLED;
165}
166
167static int tpci200_free_irq(struct ipack_device *dev)
168{
169 struct slot_irq *slot_irq;
170 struct tpci200_board *tpci200;
171
172 tpci200 = check_slot(dev);
173 if (tpci200 == NULL)
174 return -EINVAL;
175
176 if (mutex_lock_interruptible(&tpci200->mutex))
177 return -ERESTARTSYS;
178
179 if (tpci200->slots[dev->slot].irq == NULL) {
180 mutex_unlock(&tpci200->mutex);
181 return -EINVAL;
182 }
183
184 tpci200_disable_irq(tpci200, dev->slot);
185 slot_irq = tpci200->slots[dev->slot].irq;
186
187 RCU_INIT_POINTER(tpci200->slots[dev->slot].irq, NULL);
188 synchronize_rcu();
189 kfree(slot_irq);
190 mutex_unlock(&tpci200->mutex);
191 return 0;
192}
193
194static int tpci200_request_irq(struct ipack_device *dev,
195 irqreturn_t (*handler)(void *), void *arg)
196{
197 int res = 0;
198 struct slot_irq *slot_irq;
199 struct tpci200_board *tpci200;
200
201 tpci200 = check_slot(dev);
202 if (tpci200 == NULL)
203 return -EINVAL;
204
205 if (mutex_lock_interruptible(&tpci200->mutex))
206 return -ERESTARTSYS;
207
208 if (tpci200->slots[dev->slot].irq != NULL) {
209 dev_err(&dev->dev,
210 "Slot [%d:%d] IRQ already registered !\n",
211 dev->bus->bus_nr,
212 dev->slot);
213 res = -EINVAL;
214 goto out_unlock;
215 }
216
217 slot_irq = kzalloc(sizeof(struct slot_irq), GFP_KERNEL);
218 if (slot_irq == NULL) {
219 dev_err(&dev->dev,
220 "Slot [%d:%d] unable to allocate memory for IRQ !\n",
221 dev->bus->bus_nr, dev->slot);
222 res = -ENOMEM;
223 goto out_unlock;
224 }
225
226
227
228
229
230
231
232 slot_irq->handler = handler;
233 slot_irq->arg = arg;
234 slot_irq->holder = dev;
235
236 rcu_assign_pointer(tpci200->slots[dev->slot].irq, slot_irq);
237 tpci200_enable_irq(tpci200, dev->slot);
238
239out_unlock:
240 mutex_unlock(&tpci200->mutex);
241 return res;
242}
243
244static int tpci200_register(struct tpci200_board *tpci200)
245{
246 int i;
247 int res;
248 phys_addr_t ioidint_base;
249 unsigned short slot_ctrl;
250
251 if (pci_enable_device(tpci200->info->pdev) < 0)
252 return -ENODEV;
253
254
255 res = pci_request_region(tpci200->info->pdev, TPCI200_IP_INTERFACE_BAR,
256 "Carrier IP interface registers");
257 if (res) {
258 dev_err(&tpci200->info->pdev->dev,
259 "(bn 0x%X, sn 0x%X) failed to allocate PCI resource for BAR 2 !",
260 tpci200->info->pdev->bus->number,
261 tpci200->info->pdev->devfn);
262 goto out_disable_pci;
263 }
264
265
266 res = pci_request_region(tpci200->info->pdev,
267 TPCI200_IO_ID_INT_SPACES_BAR,
268 "Carrier IO ID INT space");
269 if (res) {
270 dev_err(&tpci200->info->pdev->dev,
271 "(bn 0x%X, sn 0x%X) failed to allocate PCI resource for BAR 3 !",
272 tpci200->info->pdev->bus->number,
273 tpci200->info->pdev->devfn);
274 goto out_release_ip_space;
275 }
276
277
278 res = pci_request_region(tpci200->info->pdev, TPCI200_MEM8_SPACE_BAR,
279 "Carrier MEM8 space");
280 if (res) {
281 dev_err(&tpci200->info->pdev->dev,
282 "(bn 0x%X, sn 0x%X) failed to allocate PCI resource for BAR 5!",
283 tpci200->info->pdev->bus->number,
284 tpci200->info->pdev->devfn);
285 goto out_release_ioid_int_space;
286 }
287
288
289 res = pci_request_region(tpci200->info->pdev, TPCI200_MEM16_SPACE_BAR,
290 "Carrier MEM16 space");
291 if (res) {
292 dev_err(&tpci200->info->pdev->dev,
293 "(bn 0x%X, sn 0x%X) failed to allocate PCI resource for BAR 4!",
294 tpci200->info->pdev->bus->number,
295 tpci200->info->pdev->devfn);
296 goto out_release_mem8_space;
297 }
298
299
300 tpci200->info->interface_regs =
301 ioremap_nocache(pci_resource_start(tpci200->info->pdev,
302 TPCI200_IP_INTERFACE_BAR),
303 TPCI200_IFACE_SIZE);
304 if (!tpci200->info->interface_regs) {
305 dev_err(&tpci200->info->pdev->dev,
306 "(bn 0x%X, sn 0x%X) failed to map driver user space!",
307 tpci200->info->pdev->bus->number,
308 tpci200->info->pdev->devfn);
309 goto out_release_mem8_space;
310 }
311
312
313 spin_lock_init(&tpci200->regs_lock);
314
315 ioidint_base = pci_resource_start(tpci200->info->pdev,
316 TPCI200_IO_ID_INT_SPACES_BAR);
317 tpci200->mod_mem[IPACK_IO_SPACE] = ioidint_base + TPCI200_IO_SPACE_OFF;
318 tpci200->mod_mem[IPACK_ID_SPACE] = ioidint_base + TPCI200_ID_SPACE_OFF;
319 tpci200->mod_mem[IPACK_INT_SPACE] =
320 ioidint_base + TPCI200_INT_SPACE_OFF;
321 tpci200->mod_mem[IPACK_MEM8_SPACE] =
322 pci_resource_start(tpci200->info->pdev,
323 TPCI200_MEM8_SPACE_BAR);
324 tpci200->mod_mem[IPACK_MEM16_SPACE] =
325 pci_resource_start(tpci200->info->pdev,
326 TPCI200_MEM16_SPACE_BAR);
327
328
329
330
331
332
333
334
335
336 slot_ctrl = 0;
337 for (i = 0; i < TPCI200_NB_SLOT; i++)
338 writew(slot_ctrl, &tpci200->info->interface_regs->control[i]);
339
340 res = request_irq(tpci200->info->pdev->irq,
341 tpci200_interrupt, IRQF_SHARED,
342 KBUILD_MODNAME, (void *) tpci200);
343 if (res) {
344 dev_err(&tpci200->info->pdev->dev,
345 "(bn 0x%X, sn 0x%X) unable to register IRQ !",
346 tpci200->info->pdev->bus->number,
347 tpci200->info->pdev->devfn);
348 goto out_release_ioid_int_space;
349 }
350
351 return 0;
352
353out_release_mem8_space:
354 pci_release_region(tpci200->info->pdev, TPCI200_MEM8_SPACE_BAR);
355out_release_ioid_int_space:
356 pci_release_region(tpci200->info->pdev, TPCI200_IO_ID_INT_SPACES_BAR);
357out_release_ip_space:
358 pci_release_region(tpci200->info->pdev, TPCI200_IP_INTERFACE_BAR);
359out_disable_pci:
360 pci_disable_device(tpci200->info->pdev);
361 return res;
362}
363
364static int tpci200_get_clockrate(struct ipack_device *dev)
365{
366 struct tpci200_board *tpci200 = check_slot(dev);
367 __le16 __iomem *addr;
368
369 if (!tpci200)
370 return -ENODEV;
371
372 addr = &tpci200->info->interface_regs->control[dev->slot];
373 return (ioread16(addr) & TPCI200_CLK32) ? 32 : 8;
374}
375
376static int tpci200_set_clockrate(struct ipack_device *dev, int mherz)
377{
378 struct tpci200_board *tpci200 = check_slot(dev);
379 __le16 __iomem *addr;
380
381 if (!tpci200)
382 return -ENODEV;
383
384 addr = &tpci200->info->interface_regs->control[dev->slot];
385
386 switch (mherz) {
387 case 8:
388 tpci200_clear_mask(tpci200, addr, TPCI200_CLK32);
389 break;
390 case 32:
391 tpci200_set_mask(tpci200, addr, TPCI200_CLK32);
392 break;
393 default:
394 return -EINVAL;
395 }
396 return 0;
397}
398
399static int tpci200_get_error(struct ipack_device *dev)
400{
401 struct tpci200_board *tpci200 = check_slot(dev);
402 __le16 __iomem *addr;
403 u16 mask;
404
405 if (!tpci200)
406 return -ENODEV;
407
408 addr = &tpci200->info->interface_regs->status;
409 mask = tpci200_status_error[dev->slot];
410 return (ioread16(addr) & mask) ? 1 : 0;
411}
412
413static int tpci200_get_timeout(struct ipack_device *dev)
414{
415 struct tpci200_board *tpci200 = check_slot(dev);
416 __le16 __iomem *addr;
417 u16 mask;
418
419 if (!tpci200)
420 return -ENODEV;
421
422 addr = &tpci200->info->interface_regs->status;
423 mask = tpci200_status_timeout[dev->slot];
424
425 return (ioread16(addr) & mask) ? 1 : 0;
426}
427
428static int tpci200_reset_timeout(struct ipack_device *dev)
429{
430 struct tpci200_board *tpci200 = check_slot(dev);
431 __le16 __iomem *addr;
432 u16 mask;
433
434 if (!tpci200)
435 return -ENODEV;
436
437 addr = &tpci200->info->interface_regs->status;
438 mask = tpci200_status_timeout[dev->slot];
439
440 iowrite16(mask, addr);
441 return 0;
442}
443
444static void tpci200_uninstall(struct tpci200_board *tpci200)
445{
446 tpci200_unregister(tpci200);
447 kfree(tpci200->slots);
448}
449
450static const struct ipack_bus_ops tpci200_bus_ops = {
451 .request_irq = tpci200_request_irq,
452 .free_irq = tpci200_free_irq,
453 .get_clockrate = tpci200_get_clockrate,
454 .set_clockrate = tpci200_set_clockrate,
455 .get_error = tpci200_get_error,
456 .get_timeout = tpci200_get_timeout,
457 .reset_timeout = tpci200_reset_timeout,
458};
459
460static int tpci200_install(struct tpci200_board *tpci200)
461{
462 int res;
463
464 tpci200->slots = kcalloc(TPCI200_NB_SLOT, sizeof(struct tpci200_slot),
465 GFP_KERNEL);
466 if (tpci200->slots == NULL)
467 return -ENOMEM;
468
469 res = tpci200_register(tpci200);
470 if (res) {
471 kfree(tpci200->slots);
472 tpci200->slots = NULL;
473 return res;
474 }
475
476 mutex_init(&tpci200->mutex);
477 return 0;
478}
479
480static void tpci200_release_device(struct ipack_device *dev)
481{
482 kfree(dev);
483}
484
485static int tpci200_create_device(struct tpci200_board *tpci200, int i)
486{
487 int ret;
488 enum ipack_space space;
489 struct ipack_device *dev =
490 kzalloc(sizeof(struct ipack_device), GFP_KERNEL);
491 if (!dev)
492 return -ENOMEM;
493 dev->slot = i;
494 dev->bus = tpci200->info->ipack_bus;
495 dev->release = tpci200_release_device;
496
497 for (space = 0; space < IPACK_SPACE_COUNT; space++) {
498 dev->region[space].start =
499 tpci200->mod_mem[space]
500 + tpci200_space_interval[space] * i;
501 dev->region[space].size = tpci200_space_size[space];
502 }
503
504 ret = ipack_device_init(dev);
505 if (ret < 0) {
506 ipack_put_device(dev);
507 return ret;
508 }
509
510 ret = ipack_device_add(dev);
511 if (ret < 0)
512 ipack_put_device(dev);
513
514 return ret;
515}
516
517static int tpci200_pci_probe(struct pci_dev *pdev,
518 const struct pci_device_id *id)
519{
520 int ret, i;
521 struct tpci200_board *tpci200;
522 u32 reg32;
523
524 tpci200 = kzalloc(sizeof(struct tpci200_board), GFP_KERNEL);
525 if (!tpci200)
526 return -ENOMEM;
527
528 tpci200->info = kzalloc(sizeof(struct tpci200_infos), GFP_KERNEL);
529 if (!tpci200->info) {
530 ret = -ENOMEM;
531 goto out_err_info;
532 }
533
534 pci_dev_get(pdev);
535
536
537 ret = pci_request_region(pdev, TPCI200_CFG_MEM_BAR,
538 KBUILD_MODNAME " Configuration Memory");
539 if (ret) {
540 dev_err(&pdev->dev, "Failed to allocate PCI Configuration Memory");
541 ret = -EBUSY;
542 goto out_err_pci_request;
543 }
544 tpci200->info->cfg_regs = ioremap_nocache(
545 pci_resource_start(pdev, TPCI200_CFG_MEM_BAR),
546 pci_resource_len(pdev, TPCI200_CFG_MEM_BAR));
547 if (!tpci200->info->cfg_regs) {
548 dev_err(&pdev->dev, "Failed to map PCI Configuration Memory");
549 ret = -EFAULT;
550 goto out_err_ioremap;
551 }
552
553
554
555
556 reg32 = ioread32(tpci200->info->cfg_regs + LAS1_DESC);
557 reg32 |= 1 << LAS_BIT_BIGENDIAN;
558 iowrite32(reg32, tpci200->info->cfg_regs + LAS1_DESC);
559
560 reg32 = ioread32(tpci200->info->cfg_regs + LAS2_DESC);
561 reg32 |= 1 << LAS_BIT_BIGENDIAN;
562 iowrite32(reg32, tpci200->info->cfg_regs + LAS2_DESC);
563
564
565 tpci200->info->pdev = pdev;
566 tpci200->info->id_table = (struct pci_device_id *)id;
567
568
569 ret = tpci200_install(tpci200);
570 if (ret) {
571 dev_err(&pdev->dev, "error during tpci200 install\n");
572 ret = -ENODEV;
573 goto out_err_install;
574 }
575
576
577 tpci200->info->ipack_bus = ipack_bus_register(&pdev->dev,
578 TPCI200_NB_SLOT,
579 &tpci200_bus_ops,
580 THIS_MODULE);
581 if (!tpci200->info->ipack_bus) {
582 dev_err(&pdev->dev,
583 "error registering the carrier on ipack driver\n");
584 ret = -EFAULT;
585 goto out_err_bus_register;
586 }
587
588
589 tpci200->number = tpci200->info->ipack_bus->bus_nr;
590 dev_set_drvdata(&pdev->dev, tpci200);
591
592 for (i = 0; i < TPCI200_NB_SLOT; i++)
593 tpci200_create_device(tpci200, i);
594 return 0;
595
596out_err_bus_register:
597 tpci200_uninstall(tpci200);
598out_err_install:
599 iounmap(tpci200->info->cfg_regs);
600out_err_ioremap:
601 pci_release_region(pdev, TPCI200_CFG_MEM_BAR);
602out_err_pci_request:
603 pci_dev_put(pdev);
604 kfree(tpci200->info);
605out_err_info:
606 kfree(tpci200);
607 return ret;
608}
609
610static void __tpci200_pci_remove(struct tpci200_board *tpci200)
611{
612 ipack_bus_unregister(tpci200->info->ipack_bus);
613 tpci200_uninstall(tpci200);
614
615 kfree(tpci200->info);
616 kfree(tpci200);
617}
618
619static void tpci200_pci_remove(struct pci_dev *dev)
620{
621 struct tpci200_board *tpci200 = pci_get_drvdata(dev);
622
623 __tpci200_pci_remove(tpci200);
624}
625
626static const struct pci_device_id tpci200_idtable[] = {
627 { TPCI200_VENDOR_ID, TPCI200_DEVICE_ID, TPCI200_SUBVENDOR_ID,
628 TPCI200_SUBDEVICE_ID },
629 { 0, },
630};
631
632MODULE_DEVICE_TABLE(pci, tpci200_idtable);
633
634static struct pci_driver tpci200_pci_drv = {
635 .name = "tpci200",
636 .id_table = tpci200_idtable,
637 .probe = tpci200_pci_probe,
638 .remove = tpci200_pci_remove,
639};
640
641module_pci_driver(tpci200_pci_drv);
642
643MODULE_DESCRIPTION("TEWS TPCI-200 device driver");
644MODULE_LICENSE("GPL");
645
