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Merge tag 'xtensa-20180820' of git://github.com/jcmvbkbc/linux-xtensa
[mirror_ubuntu-eoan-kernel.git] / drivers / vme / bridges / vme_ca91cx42.c
1 /*
2 * Support for the Tundra Universe I/II VME-PCI Bridge Chips
3 *
4 * Author: Martyn Welch <martyn.welch@ge.com>
5 * Copyright 2008 GE Intelligent Platforms Embedded Systems, Inc.
6 *
7 * Based on work by Tom Armistead and Ajit Prem
8 * Copyright 2004 Motorola Inc.
9 *
10 * Derived from ca91c042.c by Michael Wyrick
11 *
12 * This program is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License as published by the
14 * Free Software Foundation; either version 2 of the License, or (at your
15 * option) any later version.
16 */
17
18 #include <linux/module.h>
19 #include <linux/mm.h>
20 #include <linux/types.h>
21 #include <linux/errno.h>
22 #include <linux/pci.h>
23 #include <linux/dma-mapping.h>
24 #include <linux/poll.h>
25 #include <linux/interrupt.h>
26 #include <linux/spinlock.h>
27 #include <linux/sched.h>
28 #include <linux/slab.h>
29 #include <linux/time.h>
30 #include <linux/io.h>
31 #include <linux/uaccess.h>
32 #include <linux/vme.h>
33
34 #include "../vme_bridge.h"
35 #include "vme_ca91cx42.h"
36
37 static int ca91cx42_probe(struct pci_dev *, const struct pci_device_id *);
38 static void ca91cx42_remove(struct pci_dev *);
39
40 /* Module parameters */
41 static int geoid;
42
43 static const char driver_name[] = "vme_ca91cx42";
44
45 static const struct pci_device_id ca91cx42_ids[] = {
46 { PCI_DEVICE(PCI_VENDOR_ID_TUNDRA, PCI_DEVICE_ID_TUNDRA_CA91C142) },
47 { },
48 };
49
50 MODULE_DEVICE_TABLE(pci, ca91cx42_ids);
51
52 static struct pci_driver ca91cx42_driver = {
53 .name = driver_name,
54 .id_table = ca91cx42_ids,
55 .probe = ca91cx42_probe,
56 .remove = ca91cx42_remove,
57 };
58
59 static u32 ca91cx42_DMA_irqhandler(struct ca91cx42_driver *bridge)
60 {
61 wake_up(&bridge->dma_queue);
62
63 return CA91CX42_LINT_DMA;
64 }
65
66 static u32 ca91cx42_LM_irqhandler(struct ca91cx42_driver *bridge, u32 stat)
67 {
68 int i;
69 u32 serviced = 0;
70
71 for (i = 0; i < 4; i++) {
72 if (stat & CA91CX42_LINT_LM[i]) {
73 /* We only enable interrupts if the callback is set */
74 bridge->lm_callback[i](bridge->lm_data[i]);
75 serviced |= CA91CX42_LINT_LM[i];
76 }
77 }
78
79 return serviced;
80 }
81
82 /* XXX This needs to be split into 4 queues */
83 static u32 ca91cx42_MB_irqhandler(struct ca91cx42_driver *bridge, int mbox_mask)
84 {
85 wake_up(&bridge->mbox_queue);
86
87 return CA91CX42_LINT_MBOX;
88 }
89
90 static u32 ca91cx42_IACK_irqhandler(struct ca91cx42_driver *bridge)
91 {
92 wake_up(&bridge->iack_queue);
93
94 return CA91CX42_LINT_SW_IACK;
95 }
96
97 static u32 ca91cx42_VERR_irqhandler(struct vme_bridge *ca91cx42_bridge)
98 {
99 int val;
100 struct ca91cx42_driver *bridge;
101
102 bridge = ca91cx42_bridge->driver_priv;
103
104 val = ioread32(bridge->base + DGCS);
105
106 if (!(val & 0x00000800)) {
107 dev_err(ca91cx42_bridge->parent, "ca91cx42_VERR_irqhandler DMA "
108 "Read Error DGCS=%08X\n", val);
109 }
110
111 return CA91CX42_LINT_VERR;
112 }
113
114 static u32 ca91cx42_LERR_irqhandler(struct vme_bridge *ca91cx42_bridge)
115 {
116 int val;
117 struct ca91cx42_driver *bridge;
118
119 bridge = ca91cx42_bridge->driver_priv;
120
121 val = ioread32(bridge->base + DGCS);
122
123 if (!(val & 0x00000800))
124 dev_err(ca91cx42_bridge->parent, "ca91cx42_LERR_irqhandler DMA "
125 "Read Error DGCS=%08X\n", val);
126
127 return CA91CX42_LINT_LERR;
128 }
129
130
131 static u32 ca91cx42_VIRQ_irqhandler(struct vme_bridge *ca91cx42_bridge,
132 int stat)
133 {
134 int vec, i, serviced = 0;
135 struct ca91cx42_driver *bridge;
136
137 bridge = ca91cx42_bridge->driver_priv;
138
139
140 for (i = 7; i > 0; i--) {
141 if (stat & (1 << i)) {
142 vec = ioread32(bridge->base +
143 CA91CX42_V_STATID[i]) & 0xff;
144
145 vme_irq_handler(ca91cx42_bridge, i, vec);
146
147 serviced |= (1 << i);
148 }
149 }
150
151 return serviced;
152 }
153
154 static irqreturn_t ca91cx42_irqhandler(int irq, void *ptr)
155 {
156 u32 stat, enable, serviced = 0;
157 struct vme_bridge *ca91cx42_bridge;
158 struct ca91cx42_driver *bridge;
159
160 ca91cx42_bridge = ptr;
161
162 bridge = ca91cx42_bridge->driver_priv;
163
164 enable = ioread32(bridge->base + LINT_EN);
165 stat = ioread32(bridge->base + LINT_STAT);
166
167 /* Only look at unmasked interrupts */
168 stat &= enable;
169
170 if (unlikely(!stat))
171 return IRQ_NONE;
172
173 if (stat & CA91CX42_LINT_DMA)
174 serviced |= ca91cx42_DMA_irqhandler(bridge);
175 if (stat & (CA91CX42_LINT_LM0 | CA91CX42_LINT_LM1 | CA91CX42_LINT_LM2 |
176 CA91CX42_LINT_LM3))
177 serviced |= ca91cx42_LM_irqhandler(bridge, stat);
178 if (stat & CA91CX42_LINT_MBOX)
179 serviced |= ca91cx42_MB_irqhandler(bridge, stat);
180 if (stat & CA91CX42_LINT_SW_IACK)
181 serviced |= ca91cx42_IACK_irqhandler(bridge);
182 if (stat & CA91CX42_LINT_VERR)
183 serviced |= ca91cx42_VERR_irqhandler(ca91cx42_bridge);
184 if (stat & CA91CX42_LINT_LERR)
185 serviced |= ca91cx42_LERR_irqhandler(ca91cx42_bridge);
186 if (stat & (CA91CX42_LINT_VIRQ1 | CA91CX42_LINT_VIRQ2 |
187 CA91CX42_LINT_VIRQ3 | CA91CX42_LINT_VIRQ4 |
188 CA91CX42_LINT_VIRQ5 | CA91CX42_LINT_VIRQ6 |
189 CA91CX42_LINT_VIRQ7))
190 serviced |= ca91cx42_VIRQ_irqhandler(ca91cx42_bridge, stat);
191
192 /* Clear serviced interrupts */
193 iowrite32(serviced, bridge->base + LINT_STAT);
194
195 return IRQ_HANDLED;
196 }
197
198 static int ca91cx42_irq_init(struct vme_bridge *ca91cx42_bridge)
199 {
200 int result, tmp;
201 struct pci_dev *pdev;
202 struct ca91cx42_driver *bridge;
203
204 bridge = ca91cx42_bridge->driver_priv;
205
206 /* Need pdev */
207 pdev = to_pci_dev(ca91cx42_bridge->parent);
208
209 /* Disable interrupts from PCI to VME */
210 iowrite32(0, bridge->base + VINT_EN);
211
212 /* Disable PCI interrupts */
213 iowrite32(0, bridge->base + LINT_EN);
214 /* Clear Any Pending PCI Interrupts */
215 iowrite32(0x00FFFFFF, bridge->base + LINT_STAT);
216
217 result = request_irq(pdev->irq, ca91cx42_irqhandler, IRQF_SHARED,
218 driver_name, ca91cx42_bridge);
219 if (result) {
220 dev_err(&pdev->dev, "Can't get assigned pci irq vector %02X\n",
221 pdev->irq);
222 return result;
223 }
224
225 /* Ensure all interrupts are mapped to PCI Interrupt 0 */
226 iowrite32(0, bridge->base + LINT_MAP0);
227 iowrite32(0, bridge->base + LINT_MAP1);
228 iowrite32(0, bridge->base + LINT_MAP2);
229
230 /* Enable DMA, mailbox & LM Interrupts */
231 tmp = CA91CX42_LINT_MBOX3 | CA91CX42_LINT_MBOX2 | CA91CX42_LINT_MBOX1 |
232 CA91CX42_LINT_MBOX0 | CA91CX42_LINT_SW_IACK |
233 CA91CX42_LINT_VERR | CA91CX42_LINT_LERR | CA91CX42_LINT_DMA;
234
235 iowrite32(tmp, bridge->base + LINT_EN);
236
237 return 0;
238 }
239
240 static void ca91cx42_irq_exit(struct ca91cx42_driver *bridge,
241 struct pci_dev *pdev)
242 {
243 struct vme_bridge *ca91cx42_bridge;
244
245 /* Disable interrupts from PCI to VME */
246 iowrite32(0, bridge->base + VINT_EN);
247
248 /* Disable PCI interrupts */
249 iowrite32(0, bridge->base + LINT_EN);
250 /* Clear Any Pending PCI Interrupts */
251 iowrite32(0x00FFFFFF, bridge->base + LINT_STAT);
252
253 ca91cx42_bridge = container_of((void *)bridge, struct vme_bridge,
254 driver_priv);
255 free_irq(pdev->irq, ca91cx42_bridge);
256 }
257
258 static int ca91cx42_iack_received(struct ca91cx42_driver *bridge, int level)
259 {
260 u32 tmp;
261
262 tmp = ioread32(bridge->base + LINT_STAT);
263
264 if (tmp & (1 << level))
265 return 0;
266 else
267 return 1;
268 }
269
270 /*
271 * Set up an VME interrupt
272 */
273 static void ca91cx42_irq_set(struct vme_bridge *ca91cx42_bridge, int level,
274 int state, int sync)
275
276 {
277 struct pci_dev *pdev;
278 u32 tmp;
279 struct ca91cx42_driver *bridge;
280
281 bridge = ca91cx42_bridge->driver_priv;
282
283 /* Enable IRQ level */
284 tmp = ioread32(bridge->base + LINT_EN);
285
286 if (state == 0)
287 tmp &= ~CA91CX42_LINT_VIRQ[level];
288 else
289 tmp |= CA91CX42_LINT_VIRQ[level];
290
291 iowrite32(tmp, bridge->base + LINT_EN);
292
293 if ((state == 0) && (sync != 0)) {
294 pdev = to_pci_dev(ca91cx42_bridge->parent);
295
296 synchronize_irq(pdev->irq);
297 }
298 }
299
300 static int ca91cx42_irq_generate(struct vme_bridge *ca91cx42_bridge, int level,
301 int statid)
302 {
303 u32 tmp;
304 struct ca91cx42_driver *bridge;
305
306 bridge = ca91cx42_bridge->driver_priv;
307
308 /* Universe can only generate even vectors */
309 if (statid & 1)
310 return -EINVAL;
311
312 mutex_lock(&bridge->vme_int);
313
314 tmp = ioread32(bridge->base + VINT_EN);
315
316 /* Set Status/ID */
317 iowrite32(statid << 24, bridge->base + STATID);
318
319 /* Assert VMEbus IRQ */
320 tmp = tmp | (1 << (level + 24));
321 iowrite32(tmp, bridge->base + VINT_EN);
322
323 /* Wait for IACK */
324 wait_event_interruptible(bridge->iack_queue,
325 ca91cx42_iack_received(bridge, level));
326
327 /* Return interrupt to low state */
328 tmp = ioread32(bridge->base + VINT_EN);
329 tmp = tmp & ~(1 << (level + 24));
330 iowrite32(tmp, bridge->base + VINT_EN);
331
332 mutex_unlock(&bridge->vme_int);
333
334 return 0;
335 }
336
337 static int ca91cx42_slave_set(struct vme_slave_resource *image, int enabled,
338 unsigned long long vme_base, unsigned long long size,
339 dma_addr_t pci_base, u32 aspace, u32 cycle)
340 {
341 unsigned int i, addr = 0, granularity;
342 unsigned int temp_ctl = 0;
343 unsigned int vme_bound, pci_offset;
344 struct vme_bridge *ca91cx42_bridge;
345 struct ca91cx42_driver *bridge;
346
347 ca91cx42_bridge = image->parent;
348
349 bridge = ca91cx42_bridge->driver_priv;
350
351 i = image->number;
352
353 switch (aspace) {
354 case VME_A16:
355 addr |= CA91CX42_VSI_CTL_VAS_A16;
356 break;
357 case VME_A24:
358 addr |= CA91CX42_VSI_CTL_VAS_A24;
359 break;
360 case VME_A32:
361 addr |= CA91CX42_VSI_CTL_VAS_A32;
362 break;
363 case VME_USER1:
364 addr |= CA91CX42_VSI_CTL_VAS_USER1;
365 break;
366 case VME_USER2:
367 addr |= CA91CX42_VSI_CTL_VAS_USER2;
368 break;
369 case VME_A64:
370 case VME_CRCSR:
371 case VME_USER3:
372 case VME_USER4:
373 default:
374 dev_err(ca91cx42_bridge->parent, "Invalid address space\n");
375 return -EINVAL;
376 break;
377 }
378
379 /*
380 * Bound address is a valid address for the window, adjust
381 * accordingly
382 */
383 vme_bound = vme_base + size;
384 pci_offset = pci_base - vme_base;
385
386 if ((i == 0) || (i == 4))
387 granularity = 0x1000;
388 else
389 granularity = 0x10000;
390
391 if (vme_base & (granularity - 1)) {
392 dev_err(ca91cx42_bridge->parent, "Invalid VME base "
393 "alignment\n");
394 return -EINVAL;
395 }
396 if (vme_bound & (granularity - 1)) {
397 dev_err(ca91cx42_bridge->parent, "Invalid VME bound "
398 "alignment\n");
399 return -EINVAL;
400 }
401 if (pci_offset & (granularity - 1)) {
402 dev_err(ca91cx42_bridge->parent, "Invalid PCI Offset "
403 "alignment\n");
404 return -EINVAL;
405 }
406
407 /* Disable while we are mucking around */
408 temp_ctl = ioread32(bridge->base + CA91CX42_VSI_CTL[i]);
409 temp_ctl &= ~CA91CX42_VSI_CTL_EN;
410 iowrite32(temp_ctl, bridge->base + CA91CX42_VSI_CTL[i]);
411
412 /* Setup mapping */
413 iowrite32(vme_base, bridge->base + CA91CX42_VSI_BS[i]);
414 iowrite32(vme_bound, bridge->base + CA91CX42_VSI_BD[i]);
415 iowrite32(pci_offset, bridge->base + CA91CX42_VSI_TO[i]);
416
417 /* Setup address space */
418 temp_ctl &= ~CA91CX42_VSI_CTL_VAS_M;
419 temp_ctl |= addr;
420
421 /* Setup cycle types */
422 temp_ctl &= ~(CA91CX42_VSI_CTL_PGM_M | CA91CX42_VSI_CTL_SUPER_M);
423 if (cycle & VME_SUPER)
424 temp_ctl |= CA91CX42_VSI_CTL_SUPER_SUPR;
425 if (cycle & VME_USER)
426 temp_ctl |= CA91CX42_VSI_CTL_SUPER_NPRIV;
427 if (cycle & VME_PROG)
428 temp_ctl |= CA91CX42_VSI_CTL_PGM_PGM;
429 if (cycle & VME_DATA)
430 temp_ctl |= CA91CX42_VSI_CTL_PGM_DATA;
431
432 /* Write ctl reg without enable */
433 iowrite32(temp_ctl, bridge->base + CA91CX42_VSI_CTL[i]);
434
435 if (enabled)
436 temp_ctl |= CA91CX42_VSI_CTL_EN;
437
438 iowrite32(temp_ctl, bridge->base + CA91CX42_VSI_CTL[i]);
439
440 return 0;
441 }
442
443 static int ca91cx42_slave_get(struct vme_slave_resource *image, int *enabled,
444 unsigned long long *vme_base, unsigned long long *size,
445 dma_addr_t *pci_base, u32 *aspace, u32 *cycle)
446 {
447 unsigned int i, granularity = 0, ctl = 0;
448 unsigned long long vme_bound, pci_offset;
449 struct ca91cx42_driver *bridge;
450
451 bridge = image->parent->driver_priv;
452
453 i = image->number;
454
455 if ((i == 0) || (i == 4))
456 granularity = 0x1000;
457 else
458 granularity = 0x10000;
459
460 /* Read Registers */
461 ctl = ioread32(bridge->base + CA91CX42_VSI_CTL[i]);
462
463 *vme_base = ioread32(bridge->base + CA91CX42_VSI_BS[i]);
464 vme_bound = ioread32(bridge->base + CA91CX42_VSI_BD[i]);
465 pci_offset = ioread32(bridge->base + CA91CX42_VSI_TO[i]);
466
467 *pci_base = (dma_addr_t)*vme_base + pci_offset;
468 *size = (unsigned long long)((vme_bound - *vme_base) + granularity);
469
470 *enabled = 0;
471 *aspace = 0;
472 *cycle = 0;
473
474 if (ctl & CA91CX42_VSI_CTL_EN)
475 *enabled = 1;
476
477 if ((ctl & CA91CX42_VSI_CTL_VAS_M) == CA91CX42_VSI_CTL_VAS_A16)
478 *aspace = VME_A16;
479 if ((ctl & CA91CX42_VSI_CTL_VAS_M) == CA91CX42_VSI_CTL_VAS_A24)
480 *aspace = VME_A24;
481 if ((ctl & CA91CX42_VSI_CTL_VAS_M) == CA91CX42_VSI_CTL_VAS_A32)
482 *aspace = VME_A32;
483 if ((ctl & CA91CX42_VSI_CTL_VAS_M) == CA91CX42_VSI_CTL_VAS_USER1)
484 *aspace = VME_USER1;
485 if ((ctl & CA91CX42_VSI_CTL_VAS_M) == CA91CX42_VSI_CTL_VAS_USER2)
486 *aspace = VME_USER2;
487
488 if (ctl & CA91CX42_VSI_CTL_SUPER_SUPR)
489 *cycle |= VME_SUPER;
490 if (ctl & CA91CX42_VSI_CTL_SUPER_NPRIV)
491 *cycle |= VME_USER;
492 if (ctl & CA91CX42_VSI_CTL_PGM_PGM)
493 *cycle |= VME_PROG;
494 if (ctl & CA91CX42_VSI_CTL_PGM_DATA)
495 *cycle |= VME_DATA;
496
497 return 0;
498 }
499
500 /*
501 * Allocate and map PCI Resource
502 */
503 static int ca91cx42_alloc_resource(struct vme_master_resource *image,
504 unsigned long long size)
505 {
506 unsigned long long existing_size;
507 int retval = 0;
508 struct pci_dev *pdev;
509 struct vme_bridge *ca91cx42_bridge;
510
511 ca91cx42_bridge = image->parent;
512
513 /* Find pci_dev container of dev */
514 if (!ca91cx42_bridge->parent) {
515 dev_err(ca91cx42_bridge->parent, "Dev entry NULL\n");
516 return -EINVAL;
517 }
518 pdev = to_pci_dev(ca91cx42_bridge->parent);
519
520 existing_size = (unsigned long long)(image->bus_resource.end -
521 image->bus_resource.start);
522
523 /* If the existing size is OK, return */
524 if (existing_size == (size - 1))
525 return 0;
526
527 if (existing_size != 0) {
528 iounmap(image->kern_base);
529 image->kern_base = NULL;
530 kfree(image->bus_resource.name);
531 release_resource(&image->bus_resource);
532 memset(&image->bus_resource, 0, sizeof(image->bus_resource));
533 }
534
535 if (!image->bus_resource.name) {
536 image->bus_resource.name = kmalloc(VMENAMSIZ+3, GFP_ATOMIC);
537 if (!image->bus_resource.name) {
538 retval = -ENOMEM;
539 goto err_name;
540 }
541 }
542
543 sprintf((char *)image->bus_resource.name, "%s.%d",
544 ca91cx42_bridge->name, image->number);
545
546 image->bus_resource.start = 0;
547 image->bus_resource.end = (unsigned long)size;
548 image->bus_resource.flags = IORESOURCE_MEM;
549
550 retval = pci_bus_alloc_resource(pdev->bus,
551 &image->bus_resource, size, 0x10000, PCIBIOS_MIN_MEM,
552 0, NULL, NULL);
553 if (retval) {
554 dev_err(ca91cx42_bridge->parent, "Failed to allocate mem "
555 "resource for window %d size 0x%lx start 0x%lx\n",
556 image->number, (unsigned long)size,
557 (unsigned long)image->bus_resource.start);
558 goto err_resource;
559 }
560
561 image->kern_base = ioremap_nocache(
562 image->bus_resource.start, size);
563 if (!image->kern_base) {
564 dev_err(ca91cx42_bridge->parent, "Failed to remap resource\n");
565 retval = -ENOMEM;
566 goto err_remap;
567 }
568
569 return 0;
570
571 err_remap:
572 release_resource(&image->bus_resource);
573 err_resource:
574 kfree(image->bus_resource.name);
575 memset(&image->bus_resource, 0, sizeof(image->bus_resource));
576 err_name:
577 return retval;
578 }
579
580 /*
581 * Free and unmap PCI Resource
582 */
583 static void ca91cx42_free_resource(struct vme_master_resource *image)
584 {
585 iounmap(image->kern_base);
586 image->kern_base = NULL;
587 release_resource(&image->bus_resource);
588 kfree(image->bus_resource.name);
589 memset(&image->bus_resource, 0, sizeof(image->bus_resource));
590 }
591
592
593 static int ca91cx42_master_set(struct vme_master_resource *image, int enabled,
594 unsigned long long vme_base, unsigned long long size, u32 aspace,
595 u32 cycle, u32 dwidth)
596 {
597 int retval = 0;
598 unsigned int i, granularity = 0;
599 unsigned int temp_ctl = 0;
600 unsigned long long pci_bound, vme_offset, pci_base;
601 struct vme_bridge *ca91cx42_bridge;
602 struct ca91cx42_driver *bridge;
603
604 ca91cx42_bridge = image->parent;
605
606 bridge = ca91cx42_bridge->driver_priv;
607
608 i = image->number;
609
610 if ((i == 0) || (i == 4))
611 granularity = 0x1000;
612 else
613 granularity = 0x10000;
614
615 /* Verify input data */
616 if (vme_base & (granularity - 1)) {
617 dev_err(ca91cx42_bridge->parent, "Invalid VME Window "
618 "alignment\n");
619 retval = -EINVAL;
620 goto err_window;
621 }
622 if (size & (granularity - 1)) {
623 dev_err(ca91cx42_bridge->parent, "Invalid VME Window "
624 "alignment\n");
625 retval = -EINVAL;
626 goto err_window;
627 }
628
629 spin_lock(&image->lock);
630
631 /*
632 * Let's allocate the resource here rather than further up the stack as
633 * it avoids pushing loads of bus dependent stuff up the stack
634 */
635 retval = ca91cx42_alloc_resource(image, size);
636 if (retval) {
637 spin_unlock(&image->lock);
638 dev_err(ca91cx42_bridge->parent, "Unable to allocate memory "
639 "for resource name\n");
640 retval = -ENOMEM;
641 goto err_res;
642 }
643
644 pci_base = (unsigned long long)image->bus_resource.start;
645
646 /*
647 * Bound address is a valid address for the window, adjust
648 * according to window granularity.
649 */
650 pci_bound = pci_base + size;
651 vme_offset = vme_base - pci_base;
652
653 /* Disable while we are mucking around */
654 temp_ctl = ioread32(bridge->base + CA91CX42_LSI_CTL[i]);
655 temp_ctl &= ~CA91CX42_LSI_CTL_EN;
656 iowrite32(temp_ctl, bridge->base + CA91CX42_LSI_CTL[i]);
657
658 /* Setup cycle types */
659 temp_ctl &= ~CA91CX42_LSI_CTL_VCT_M;
660 if (cycle & VME_BLT)
661 temp_ctl |= CA91CX42_LSI_CTL_VCT_BLT;
662 if (cycle & VME_MBLT)
663 temp_ctl |= CA91CX42_LSI_CTL_VCT_MBLT;
664
665 /* Setup data width */
666 temp_ctl &= ~CA91CX42_LSI_CTL_VDW_M;
667 switch (dwidth) {
668 case VME_D8:
669 temp_ctl |= CA91CX42_LSI_CTL_VDW_D8;
670 break;
671 case VME_D16:
672 temp_ctl |= CA91CX42_LSI_CTL_VDW_D16;
673 break;
674 case VME_D32:
675 temp_ctl |= CA91CX42_LSI_CTL_VDW_D32;
676 break;
677 case VME_D64:
678 temp_ctl |= CA91CX42_LSI_CTL_VDW_D64;
679 break;
680 default:
681 spin_unlock(&image->lock);
682 dev_err(ca91cx42_bridge->parent, "Invalid data width\n");
683 retval = -EINVAL;
684 goto err_dwidth;
685 break;
686 }
687
688 /* Setup address space */
689 temp_ctl &= ~CA91CX42_LSI_CTL_VAS_M;
690 switch (aspace) {
691 case VME_A16:
692 temp_ctl |= CA91CX42_LSI_CTL_VAS_A16;
693 break;
694 case VME_A24:
695 temp_ctl |= CA91CX42_LSI_CTL_VAS_A24;
696 break;
697 case VME_A32:
698 temp_ctl |= CA91CX42_LSI_CTL_VAS_A32;
699 break;
700 case VME_CRCSR:
701 temp_ctl |= CA91CX42_LSI_CTL_VAS_CRCSR;
702 break;
703 case VME_USER1:
704 temp_ctl |= CA91CX42_LSI_CTL_VAS_USER1;
705 break;
706 case VME_USER2:
707 temp_ctl |= CA91CX42_LSI_CTL_VAS_USER2;
708 break;
709 case VME_A64:
710 case VME_USER3:
711 case VME_USER4:
712 default:
713 spin_unlock(&image->lock);
714 dev_err(ca91cx42_bridge->parent, "Invalid address space\n");
715 retval = -EINVAL;
716 goto err_aspace;
717 break;
718 }
719
720 temp_ctl &= ~(CA91CX42_LSI_CTL_PGM_M | CA91CX42_LSI_CTL_SUPER_M);
721 if (cycle & VME_SUPER)
722 temp_ctl |= CA91CX42_LSI_CTL_SUPER_SUPR;
723 if (cycle & VME_PROG)
724 temp_ctl |= CA91CX42_LSI_CTL_PGM_PGM;
725
726 /* Setup mapping */
727 iowrite32(pci_base, bridge->base + CA91CX42_LSI_BS[i]);
728 iowrite32(pci_bound, bridge->base + CA91CX42_LSI_BD[i]);
729 iowrite32(vme_offset, bridge->base + CA91CX42_LSI_TO[i]);
730
731 /* Write ctl reg without enable */
732 iowrite32(temp_ctl, bridge->base + CA91CX42_LSI_CTL[i]);
733
734 if (enabled)
735 temp_ctl |= CA91CX42_LSI_CTL_EN;
736
737 iowrite32(temp_ctl, bridge->base + CA91CX42_LSI_CTL[i]);
738
739 spin_unlock(&image->lock);
740 return 0;
741
742 err_aspace:
743 err_dwidth:
744 ca91cx42_free_resource(image);
745 err_res:
746 err_window:
747 return retval;
748 }
749
750 static int __ca91cx42_master_get(struct vme_master_resource *image,
751 int *enabled, unsigned long long *vme_base, unsigned long long *size,
752 u32 *aspace, u32 *cycle, u32 *dwidth)
753 {
754 unsigned int i, ctl;
755 unsigned long long pci_base, pci_bound, vme_offset;
756 struct ca91cx42_driver *bridge;
757
758 bridge = image->parent->driver_priv;
759
760 i = image->number;
761
762 ctl = ioread32(bridge->base + CA91CX42_LSI_CTL[i]);
763
764 pci_base = ioread32(bridge->base + CA91CX42_LSI_BS[i]);
765 vme_offset = ioread32(bridge->base + CA91CX42_LSI_TO[i]);
766 pci_bound = ioread32(bridge->base + CA91CX42_LSI_BD[i]);
767
768 *vme_base = pci_base + vme_offset;
769 *size = (unsigned long long)(pci_bound - pci_base);
770
771 *enabled = 0;
772 *aspace = 0;
773 *cycle = 0;
774 *dwidth = 0;
775
776 if (ctl & CA91CX42_LSI_CTL_EN)
777 *enabled = 1;
778
779 /* Setup address space */
780 switch (ctl & CA91CX42_LSI_CTL_VAS_M) {
781 case CA91CX42_LSI_CTL_VAS_A16:
782 *aspace = VME_A16;
783 break;
784 case CA91CX42_LSI_CTL_VAS_A24:
785 *aspace = VME_A24;
786 break;
787 case CA91CX42_LSI_CTL_VAS_A32:
788 *aspace = VME_A32;
789 break;
790 case CA91CX42_LSI_CTL_VAS_CRCSR:
791 *aspace = VME_CRCSR;
792 break;
793 case CA91CX42_LSI_CTL_VAS_USER1:
794 *aspace = VME_USER1;
795 break;
796 case CA91CX42_LSI_CTL_VAS_USER2:
797 *aspace = VME_USER2;
798 break;
799 }
800
801 /* XXX Not sure howto check for MBLT */
802 /* Setup cycle types */
803 if (ctl & CA91CX42_LSI_CTL_VCT_BLT)
804 *cycle |= VME_BLT;
805 else
806 *cycle |= VME_SCT;
807
808 if (ctl & CA91CX42_LSI_CTL_SUPER_SUPR)
809 *cycle |= VME_SUPER;
810 else
811 *cycle |= VME_USER;
812
813 if (ctl & CA91CX42_LSI_CTL_PGM_PGM)
814 *cycle = VME_PROG;
815 else
816 *cycle = VME_DATA;
817
818 /* Setup data width */
819 switch (ctl & CA91CX42_LSI_CTL_VDW_M) {
820 case CA91CX42_LSI_CTL_VDW_D8:
821 *dwidth = VME_D8;
822 break;
823 case CA91CX42_LSI_CTL_VDW_D16:
824 *dwidth = VME_D16;
825 break;
826 case CA91CX42_LSI_CTL_VDW_D32:
827 *dwidth = VME_D32;
828 break;
829 case CA91CX42_LSI_CTL_VDW_D64:
830 *dwidth = VME_D64;
831 break;
832 }
833
834 return 0;
835 }
836
837 static int ca91cx42_master_get(struct vme_master_resource *image, int *enabled,
838 unsigned long long *vme_base, unsigned long long *size, u32 *aspace,
839 u32 *cycle, u32 *dwidth)
840 {
841 int retval;
842
843 spin_lock(&image->lock);
844
845 retval = __ca91cx42_master_get(image, enabled, vme_base, size, aspace,
846 cycle, dwidth);
847
848 spin_unlock(&image->lock);
849
850 return retval;
851 }
852
853 static ssize_t ca91cx42_master_read(struct vme_master_resource *image,
854 void *buf, size_t count, loff_t offset)
855 {
856 ssize_t retval;
857 void __iomem *addr = image->kern_base + offset;
858 unsigned int done = 0;
859 unsigned int count32;
860
861 if (count == 0)
862 return 0;
863
864 spin_lock(&image->lock);
865
866 /* The following code handles VME address alignment. We cannot use
867 * memcpy_xxx here because it may cut data transfers in to 8-bit
868 * cycles when D16 or D32 cycles are required on the VME bus.
869 * On the other hand, the bridge itself assures that the maximum data
870 * cycle configured for the transfer is used and splits it
871 * automatically for non-aligned addresses, so we don't want the
872 * overhead of needlessly forcing small transfers for the entire cycle.
873 */
874 if ((uintptr_t)addr & 0x1) {
875 *(u8 *)buf = ioread8(addr);
876 done += 1;
877 if (done == count)
878 goto out;
879 }
880 if ((uintptr_t)(addr + done) & 0x2) {
881 if ((count - done) < 2) {
882 *(u8 *)(buf + done) = ioread8(addr + done);
883 done += 1;
884 goto out;
885 } else {
886 *(u16 *)(buf + done) = ioread16(addr + done);
887 done += 2;
888 }
889 }
890
891 count32 = (count - done) & ~0x3;
892 while (done < count32) {
893 *(u32 *)(buf + done) = ioread32(addr + done);
894 done += 4;
895 }
896
897 if ((count - done) & 0x2) {
898 *(u16 *)(buf + done) = ioread16(addr + done);
899 done += 2;
900 }
901 if ((count - done) & 0x1) {
902 *(u8 *)(buf + done) = ioread8(addr + done);
903 done += 1;
904 }
905 out:
906 retval = count;
907 spin_unlock(&image->lock);
908
909 return retval;
910 }
911
912 static ssize_t ca91cx42_master_write(struct vme_master_resource *image,
913 void *buf, size_t count, loff_t offset)
914 {
915 ssize_t retval;
916 void __iomem *addr = image->kern_base + offset;
917 unsigned int done = 0;
918 unsigned int count32;
919
920 if (count == 0)
921 return 0;
922
923 spin_lock(&image->lock);
924
925 /* Here we apply for the same strategy we do in master_read
926 * function in order to assure the correct cycles.
927 */
928 if ((uintptr_t)addr & 0x1) {
929 iowrite8(*(u8 *)buf, addr);
930 done += 1;
931 if (done == count)
932 goto out;
933 }
934 if ((uintptr_t)(addr + done) & 0x2) {
935 if ((count - done) < 2) {
936 iowrite8(*(u8 *)(buf + done), addr + done);
937 done += 1;
938 goto out;
939 } else {
940 iowrite16(*(u16 *)(buf + done), addr + done);
941 done += 2;
942 }
943 }
944
945 count32 = (count - done) & ~0x3;
946 while (done < count32) {
947 iowrite32(*(u32 *)(buf + done), addr + done);
948 done += 4;
949 }
950
951 if ((count - done) & 0x2) {
952 iowrite16(*(u16 *)(buf + done), addr + done);
953 done += 2;
954 }
955 if ((count - done) & 0x1) {
956 iowrite8(*(u8 *)(buf + done), addr + done);
957 done += 1;
958 }
959 out:
960 retval = count;
961
962 spin_unlock(&image->lock);
963
964 return retval;
965 }
966
967 static unsigned int ca91cx42_master_rmw(struct vme_master_resource *image,
968 unsigned int mask, unsigned int compare, unsigned int swap,
969 loff_t offset)
970 {
971 u32 result;
972 uintptr_t pci_addr;
973 struct ca91cx42_driver *bridge;
974 struct device *dev;
975
976 bridge = image->parent->driver_priv;
977 dev = image->parent->parent;
978
979 /* Find the PCI address that maps to the desired VME address */
980
981 /* Locking as we can only do one of these at a time */
982 mutex_lock(&bridge->vme_rmw);
983
984 /* Lock image */
985 spin_lock(&image->lock);
986
987 pci_addr = (uintptr_t)image->kern_base + offset;
988
989 /* Address must be 4-byte aligned */
990 if (pci_addr & 0x3) {
991 dev_err(dev, "RMW Address not 4-byte aligned\n");
992 result = -EINVAL;
993 goto out;
994 }
995
996 /* Ensure RMW Disabled whilst configuring */
997 iowrite32(0, bridge->base + SCYC_CTL);
998
999 /* Configure registers */
1000 iowrite32(mask, bridge->base + SCYC_EN);
1001 iowrite32(compare, bridge->base + SCYC_CMP);
1002 iowrite32(swap, bridge->base + SCYC_SWP);
1003 iowrite32(pci_addr, bridge->base + SCYC_ADDR);
1004
1005 /* Enable RMW */
1006 iowrite32(CA91CX42_SCYC_CTL_CYC_RMW, bridge->base + SCYC_CTL);
1007
1008 /* Kick process off with a read to the required address. */
1009 result = ioread32(image->kern_base + offset);
1010
1011 /* Disable RMW */
1012 iowrite32(0, bridge->base + SCYC_CTL);
1013
1014 out:
1015 spin_unlock(&image->lock);
1016
1017 mutex_unlock(&bridge->vme_rmw);
1018
1019 return result;
1020 }
1021
1022 static int ca91cx42_dma_list_add(struct vme_dma_list *list,
1023 struct vme_dma_attr *src, struct vme_dma_attr *dest, size_t count)
1024 {
1025 struct ca91cx42_dma_entry *entry, *prev;
1026 struct vme_dma_pci *pci_attr;
1027 struct vme_dma_vme *vme_attr;
1028 dma_addr_t desc_ptr;
1029 int retval = 0;
1030 struct device *dev;
1031
1032 dev = list->parent->parent->parent;
1033
1034 /* XXX descriptor must be aligned on 64-bit boundaries */
1035 entry = kmalloc(sizeof(*entry), GFP_KERNEL);
1036 if (!entry) {
1037 retval = -ENOMEM;
1038 goto err_mem;
1039 }
1040
1041 /* Test descriptor alignment */
1042 if ((unsigned long)&entry->descriptor & CA91CX42_DCPP_M) {
1043 dev_err(dev, "Descriptor not aligned to 16 byte boundary as "
1044 "required: %p\n", &entry->descriptor);
1045 retval = -EINVAL;
1046 goto err_align;
1047 }
1048
1049 memset(&entry->descriptor, 0, sizeof(entry->descriptor));
1050
1051 if (dest->type == VME_DMA_VME) {
1052 entry->descriptor.dctl |= CA91CX42_DCTL_L2V;
1053 vme_attr = dest->private;
1054 pci_attr = src->private;
1055 } else {
1056 vme_attr = src->private;
1057 pci_attr = dest->private;
1058 }
1059
1060 /* Check we can do fulfill required attributes */
1061 if ((vme_attr->aspace & ~(VME_A16 | VME_A24 | VME_A32 | VME_USER1 |
1062 VME_USER2)) != 0) {
1063
1064 dev_err(dev, "Unsupported cycle type\n");
1065 retval = -EINVAL;
1066 goto err_aspace;
1067 }
1068
1069 if ((vme_attr->cycle & ~(VME_SCT | VME_BLT | VME_SUPER | VME_USER |
1070 VME_PROG | VME_DATA)) != 0) {
1071
1072 dev_err(dev, "Unsupported cycle type\n");
1073 retval = -EINVAL;
1074 goto err_cycle;
1075 }
1076
1077 /* Check to see if we can fulfill source and destination */
1078 if (!(((src->type == VME_DMA_PCI) && (dest->type == VME_DMA_VME)) ||
1079 ((src->type == VME_DMA_VME) && (dest->type == VME_DMA_PCI)))) {
1080
1081 dev_err(dev, "Cannot perform transfer with this "
1082 "source-destination combination\n");
1083 retval = -EINVAL;
1084 goto err_direct;
1085 }
1086
1087 /* Setup cycle types */
1088 if (vme_attr->cycle & VME_BLT)
1089 entry->descriptor.dctl |= CA91CX42_DCTL_VCT_BLT;
1090
1091 /* Setup data width */
1092 switch (vme_attr->dwidth) {
1093 case VME_D8:
1094 entry->descriptor.dctl |= CA91CX42_DCTL_VDW_D8;
1095 break;
1096 case VME_D16:
1097 entry->descriptor.dctl |= CA91CX42_DCTL_VDW_D16;
1098 break;
1099 case VME_D32:
1100 entry->descriptor.dctl |= CA91CX42_DCTL_VDW_D32;
1101 break;
1102 case VME_D64:
1103 entry->descriptor.dctl |= CA91CX42_DCTL_VDW_D64;
1104 break;
1105 default:
1106 dev_err(dev, "Invalid data width\n");
1107 return -EINVAL;
1108 }
1109
1110 /* Setup address space */
1111 switch (vme_attr->aspace) {
1112 case VME_A16:
1113 entry->descriptor.dctl |= CA91CX42_DCTL_VAS_A16;
1114 break;
1115 case VME_A24:
1116 entry->descriptor.dctl |= CA91CX42_DCTL_VAS_A24;
1117 break;
1118 case VME_A32:
1119 entry->descriptor.dctl |= CA91CX42_DCTL_VAS_A32;
1120 break;
1121 case VME_USER1:
1122 entry->descriptor.dctl |= CA91CX42_DCTL_VAS_USER1;
1123 break;
1124 case VME_USER2:
1125 entry->descriptor.dctl |= CA91CX42_DCTL_VAS_USER2;
1126 break;
1127 default:
1128 dev_err(dev, "Invalid address space\n");
1129 return -EINVAL;
1130 break;
1131 }
1132
1133 if (vme_attr->cycle & VME_SUPER)
1134 entry->descriptor.dctl |= CA91CX42_DCTL_SUPER_SUPR;
1135 if (vme_attr->cycle & VME_PROG)
1136 entry->descriptor.dctl |= CA91CX42_DCTL_PGM_PGM;
1137
1138 entry->descriptor.dtbc = count;
1139 entry->descriptor.dla = pci_attr->address;
1140 entry->descriptor.dva = vme_attr->address;
1141 entry->descriptor.dcpp = CA91CX42_DCPP_NULL;
1142
1143 /* Add to list */
1144 list_add_tail(&entry->list, &list->entries);
1145
1146 /* Fill out previous descriptors "Next Address" */
1147 if (entry->list.prev != &list->entries) {
1148 prev = list_entry(entry->list.prev, struct ca91cx42_dma_entry,
1149 list);
1150 /* We need the bus address for the pointer */
1151 desc_ptr = virt_to_bus(&entry->descriptor);
1152 prev->descriptor.dcpp = desc_ptr & ~CA91CX42_DCPP_M;
1153 }
1154
1155 return 0;
1156
1157 err_cycle:
1158 err_aspace:
1159 err_direct:
1160 err_align:
1161 kfree(entry);
1162 err_mem:
1163 return retval;
1164 }
1165
1166 static int ca91cx42_dma_busy(struct vme_bridge *ca91cx42_bridge)
1167 {
1168 u32 tmp;
1169 struct ca91cx42_driver *bridge;
1170
1171 bridge = ca91cx42_bridge->driver_priv;
1172
1173 tmp = ioread32(bridge->base + DGCS);
1174
1175 if (tmp & CA91CX42_DGCS_ACT)
1176 return 0;
1177 else
1178 return 1;
1179 }
1180
1181 static int ca91cx42_dma_list_exec(struct vme_dma_list *list)
1182 {
1183 struct vme_dma_resource *ctrlr;
1184 struct ca91cx42_dma_entry *entry;
1185 int retval;
1186 dma_addr_t bus_addr;
1187 u32 val;
1188 struct device *dev;
1189 struct ca91cx42_driver *bridge;
1190
1191 ctrlr = list->parent;
1192
1193 bridge = ctrlr->parent->driver_priv;
1194 dev = ctrlr->parent->parent;
1195
1196 mutex_lock(&ctrlr->mtx);
1197
1198 if (!(list_empty(&ctrlr->running))) {
1199 /*
1200 * XXX We have an active DMA transfer and currently haven't
1201 * sorted out the mechanism for "pending" DMA transfers.
1202 * Return busy.
1203 */
1204 /* Need to add to pending here */
1205 mutex_unlock(&ctrlr->mtx);
1206 return -EBUSY;
1207 } else {
1208 list_add(&list->list, &ctrlr->running);
1209 }
1210
1211 /* Get first bus address and write into registers */
1212 entry = list_first_entry(&list->entries, struct ca91cx42_dma_entry,
1213 list);
1214
1215 bus_addr = virt_to_bus(&entry->descriptor);
1216
1217 mutex_unlock(&ctrlr->mtx);
1218
1219 iowrite32(0, bridge->base + DTBC);
1220 iowrite32(bus_addr & ~CA91CX42_DCPP_M, bridge->base + DCPP);
1221
1222 /* Start the operation */
1223 val = ioread32(bridge->base + DGCS);
1224
1225 /* XXX Could set VMEbus On and Off Counters here */
1226 val &= (CA91CX42_DGCS_VON_M | CA91CX42_DGCS_VOFF_M);
1227
1228 val |= (CA91CX42_DGCS_CHAIN | CA91CX42_DGCS_STOP | CA91CX42_DGCS_HALT |
1229 CA91CX42_DGCS_DONE | CA91CX42_DGCS_LERR | CA91CX42_DGCS_VERR |
1230 CA91CX42_DGCS_PERR);
1231
1232 iowrite32(val, bridge->base + DGCS);
1233
1234 val |= CA91CX42_DGCS_GO;
1235
1236 iowrite32(val, bridge->base + DGCS);
1237
1238 retval = wait_event_interruptible(bridge->dma_queue,
1239 ca91cx42_dma_busy(ctrlr->parent));
1240
1241 if (retval) {
1242 val = ioread32(bridge->base + DGCS);
1243 iowrite32(val | CA91CX42_DGCS_STOP_REQ, bridge->base + DGCS);
1244 /* Wait for the operation to abort */
1245 wait_event(bridge->dma_queue,
1246 ca91cx42_dma_busy(ctrlr->parent));
1247 retval = -EINTR;
1248 goto exit;
1249 }
1250
1251 /*
1252 * Read status register, this register is valid until we kick off a
1253 * new transfer.
1254 */
1255 val = ioread32(bridge->base + DGCS);
1256
1257 if (val & (CA91CX42_DGCS_LERR | CA91CX42_DGCS_VERR |
1258 CA91CX42_DGCS_PERR)) {
1259
1260 dev_err(dev, "ca91c042: DMA Error. DGCS=%08X\n", val);
1261 val = ioread32(bridge->base + DCTL);
1262 retval = -EIO;
1263 }
1264
1265 exit:
1266 /* Remove list from running list */
1267 mutex_lock(&ctrlr->mtx);
1268 list_del(&list->list);
1269 mutex_unlock(&ctrlr->mtx);
1270
1271 return retval;
1272
1273 }
1274
1275 static int ca91cx42_dma_list_empty(struct vme_dma_list *list)
1276 {
1277 struct list_head *pos, *temp;
1278 struct ca91cx42_dma_entry *entry;
1279
1280 /* detach and free each entry */
1281 list_for_each_safe(pos, temp, &list->entries) {
1282 list_del(pos);
1283 entry = list_entry(pos, struct ca91cx42_dma_entry, list);
1284 kfree(entry);
1285 }
1286
1287 return 0;
1288 }
1289
1290 /*
1291 * All 4 location monitors reside at the same base - this is therefore a
1292 * system wide configuration.
1293 *
1294 * This does not enable the LM monitor - that should be done when the first
1295 * callback is attached and disabled when the last callback is removed.
1296 */
1297 static int ca91cx42_lm_set(struct vme_lm_resource *lm,
1298 unsigned long long lm_base, u32 aspace, u32 cycle)
1299 {
1300 u32 temp_base, lm_ctl = 0;
1301 int i;
1302 struct ca91cx42_driver *bridge;
1303 struct device *dev;
1304
1305 bridge = lm->parent->driver_priv;
1306 dev = lm->parent->parent;
1307
1308 /* Check the alignment of the location monitor */
1309 temp_base = (u32)lm_base;
1310 if (temp_base & 0xffff) {
1311 dev_err(dev, "Location monitor must be aligned to 64KB "
1312 "boundary");
1313 return -EINVAL;
1314 }
1315
1316 mutex_lock(&lm->mtx);
1317
1318 /* If we already have a callback attached, we can't move it! */
1319 for (i = 0; i < lm->monitors; i++) {
1320 if (bridge->lm_callback[i]) {
1321 mutex_unlock(&lm->mtx);
1322 dev_err(dev, "Location monitor callback attached, "
1323 "can't reset\n");
1324 return -EBUSY;
1325 }
1326 }
1327
1328 switch (aspace) {
1329 case VME_A16:
1330 lm_ctl |= CA91CX42_LM_CTL_AS_A16;
1331 break;
1332 case VME_A24:
1333 lm_ctl |= CA91CX42_LM_CTL_AS_A24;
1334 break;
1335 case VME_A32:
1336 lm_ctl |= CA91CX42_LM_CTL_AS_A32;
1337 break;
1338 default:
1339 mutex_unlock(&lm->mtx);
1340 dev_err(dev, "Invalid address space\n");
1341 return -EINVAL;
1342 break;
1343 }
1344
1345 if (cycle & VME_SUPER)
1346 lm_ctl |= CA91CX42_LM_CTL_SUPR;
1347 if (cycle & VME_USER)
1348 lm_ctl |= CA91CX42_LM_CTL_NPRIV;
1349 if (cycle & VME_PROG)
1350 lm_ctl |= CA91CX42_LM_CTL_PGM;
1351 if (cycle & VME_DATA)
1352 lm_ctl |= CA91CX42_LM_CTL_DATA;
1353
1354 iowrite32(lm_base, bridge->base + LM_BS);
1355 iowrite32(lm_ctl, bridge->base + LM_CTL);
1356
1357 mutex_unlock(&lm->mtx);
1358
1359 return 0;
1360 }
1361
1362 /* Get configuration of the callback monitor and return whether it is enabled
1363 * or disabled.
1364 */
1365 static int ca91cx42_lm_get(struct vme_lm_resource *lm,
1366 unsigned long long *lm_base, u32 *aspace, u32 *cycle)
1367 {
1368 u32 lm_ctl, enabled = 0;
1369 struct ca91cx42_driver *bridge;
1370
1371 bridge = lm->parent->driver_priv;
1372
1373 mutex_lock(&lm->mtx);
1374
1375 *lm_base = (unsigned long long)ioread32(bridge->base + LM_BS);
1376 lm_ctl = ioread32(bridge->base + LM_CTL);
1377
1378 if (lm_ctl & CA91CX42_LM_CTL_EN)
1379 enabled = 1;
1380
1381 if ((lm_ctl & CA91CX42_LM_CTL_AS_M) == CA91CX42_LM_CTL_AS_A16)
1382 *aspace = VME_A16;
1383 if ((lm_ctl & CA91CX42_LM_CTL_AS_M) == CA91CX42_LM_CTL_AS_A24)
1384 *aspace = VME_A24;
1385 if ((lm_ctl & CA91CX42_LM_CTL_AS_M) == CA91CX42_LM_CTL_AS_A32)
1386 *aspace = VME_A32;
1387
1388 *cycle = 0;
1389 if (lm_ctl & CA91CX42_LM_CTL_SUPR)
1390 *cycle |= VME_SUPER;
1391 if (lm_ctl & CA91CX42_LM_CTL_NPRIV)
1392 *cycle |= VME_USER;
1393 if (lm_ctl & CA91CX42_LM_CTL_PGM)
1394 *cycle |= VME_PROG;
1395 if (lm_ctl & CA91CX42_LM_CTL_DATA)
1396 *cycle |= VME_DATA;
1397
1398 mutex_unlock(&lm->mtx);
1399
1400 return enabled;
1401 }
1402
1403 /*
1404 * Attach a callback to a specific location monitor.
1405 *
1406 * Callback will be passed the monitor triggered.
1407 */
1408 static int ca91cx42_lm_attach(struct vme_lm_resource *lm, int monitor,
1409 void (*callback)(void *), void *data)
1410 {
1411 u32 lm_ctl, tmp;
1412 struct ca91cx42_driver *bridge;
1413 struct device *dev;
1414
1415 bridge = lm->parent->driver_priv;
1416 dev = lm->parent->parent;
1417
1418 mutex_lock(&lm->mtx);
1419
1420 /* Ensure that the location monitor is configured - need PGM or DATA */
1421 lm_ctl = ioread32(bridge->base + LM_CTL);
1422 if ((lm_ctl & (CA91CX42_LM_CTL_PGM | CA91CX42_LM_CTL_DATA)) == 0) {
1423 mutex_unlock(&lm->mtx);
1424 dev_err(dev, "Location monitor not properly configured\n");
1425 return -EINVAL;
1426 }
1427
1428 /* Check that a callback isn't already attached */
1429 if (bridge->lm_callback[monitor]) {
1430 mutex_unlock(&lm->mtx);
1431 dev_err(dev, "Existing callback attached\n");
1432 return -EBUSY;
1433 }
1434
1435 /* Attach callback */
1436 bridge->lm_callback[monitor] = callback;
1437 bridge->lm_data[monitor] = data;
1438
1439 /* Enable Location Monitor interrupt */
1440 tmp = ioread32(bridge->base + LINT_EN);
1441 tmp |= CA91CX42_LINT_LM[monitor];
1442 iowrite32(tmp, bridge->base + LINT_EN);
1443
1444 /* Ensure that global Location Monitor Enable set */
1445 if ((lm_ctl & CA91CX42_LM_CTL_EN) == 0) {
1446 lm_ctl |= CA91CX42_LM_CTL_EN;
1447 iowrite32(lm_ctl, bridge->base + LM_CTL);
1448 }
1449
1450 mutex_unlock(&lm->mtx);
1451
1452 return 0;
1453 }
1454
1455 /*
1456 * Detach a callback function forn a specific location monitor.
1457 */
1458 static int ca91cx42_lm_detach(struct vme_lm_resource *lm, int monitor)
1459 {
1460 u32 tmp;
1461 struct ca91cx42_driver *bridge;
1462
1463 bridge = lm->parent->driver_priv;
1464
1465 mutex_lock(&lm->mtx);
1466
1467 /* Disable Location Monitor and ensure previous interrupts are clear */
1468 tmp = ioread32(bridge->base + LINT_EN);
1469 tmp &= ~CA91CX42_LINT_LM[monitor];
1470 iowrite32(tmp, bridge->base + LINT_EN);
1471
1472 iowrite32(CA91CX42_LINT_LM[monitor],
1473 bridge->base + LINT_STAT);
1474
1475 /* Detach callback */
1476 bridge->lm_callback[monitor] = NULL;
1477 bridge->lm_data[monitor] = NULL;
1478
1479 /* If all location monitors disabled, disable global Location Monitor */
1480 if ((tmp & (CA91CX42_LINT_LM0 | CA91CX42_LINT_LM1 | CA91CX42_LINT_LM2 |
1481 CA91CX42_LINT_LM3)) == 0) {
1482 tmp = ioread32(bridge->base + LM_CTL);
1483 tmp &= ~CA91CX42_LM_CTL_EN;
1484 iowrite32(tmp, bridge->base + LM_CTL);
1485 }
1486
1487 mutex_unlock(&lm->mtx);
1488
1489 return 0;
1490 }
1491
1492 static int ca91cx42_slot_get(struct vme_bridge *ca91cx42_bridge)
1493 {
1494 u32 slot = 0;
1495 struct ca91cx42_driver *bridge;
1496
1497 bridge = ca91cx42_bridge->driver_priv;
1498
1499 if (!geoid) {
1500 slot = ioread32(bridge->base + VCSR_BS);
1501 slot = ((slot & CA91CX42_VCSR_BS_SLOT_M) >> 27);
1502 } else
1503 slot = geoid;
1504
1505 return (int)slot;
1506
1507 }
1508
1509 static void *ca91cx42_alloc_consistent(struct device *parent, size_t size,
1510 dma_addr_t *dma)
1511 {
1512 struct pci_dev *pdev;
1513
1514 /* Find pci_dev container of dev */
1515 pdev = to_pci_dev(parent);
1516
1517 return pci_alloc_consistent(pdev, size, dma);
1518 }
1519
1520 static void ca91cx42_free_consistent(struct device *parent, size_t size,
1521 void *vaddr, dma_addr_t dma)
1522 {
1523 struct pci_dev *pdev;
1524
1525 /* Find pci_dev container of dev */
1526 pdev = to_pci_dev(parent);
1527
1528 pci_free_consistent(pdev, size, vaddr, dma);
1529 }
1530
1531 /*
1532 * Configure CR/CSR space
1533 *
1534 * Access to the CR/CSR can be configured at power-up. The location of the
1535 * CR/CSR registers in the CR/CSR address space is determined by the boards
1536 * Auto-ID or Geographic address. This function ensures that the window is
1537 * enabled at an offset consistent with the boards geopgraphic address.
1538 */
1539 static int ca91cx42_crcsr_init(struct vme_bridge *ca91cx42_bridge,
1540 struct pci_dev *pdev)
1541 {
1542 unsigned int crcsr_addr;
1543 int tmp, slot;
1544 struct ca91cx42_driver *bridge;
1545
1546 bridge = ca91cx42_bridge->driver_priv;
1547
1548 slot = ca91cx42_slot_get(ca91cx42_bridge);
1549
1550 /* Write CSR Base Address if slot ID is supplied as a module param */
1551 if (geoid)
1552 iowrite32(geoid << 27, bridge->base + VCSR_BS);
1553
1554 dev_info(&pdev->dev, "CR/CSR Offset: %d\n", slot);
1555 if (slot == 0) {
1556 dev_err(&pdev->dev, "Slot number is unset, not configuring "
1557 "CR/CSR space\n");
1558 return -EINVAL;
1559 }
1560
1561 /* Allocate mem for CR/CSR image */
1562 bridge->crcsr_kernel = pci_zalloc_consistent(pdev, VME_CRCSR_BUF_SIZE,
1563 &bridge->crcsr_bus);
1564 if (!bridge->crcsr_kernel) {
1565 dev_err(&pdev->dev, "Failed to allocate memory for CR/CSR "
1566 "image\n");
1567 return -ENOMEM;
1568 }
1569
1570 crcsr_addr = slot * (512 * 1024);
1571 iowrite32(bridge->crcsr_bus - crcsr_addr, bridge->base + VCSR_TO);
1572
1573 tmp = ioread32(bridge->base + VCSR_CTL);
1574 tmp |= CA91CX42_VCSR_CTL_EN;
1575 iowrite32(tmp, bridge->base + VCSR_CTL);
1576
1577 return 0;
1578 }
1579
1580 static void ca91cx42_crcsr_exit(struct vme_bridge *ca91cx42_bridge,
1581 struct pci_dev *pdev)
1582 {
1583 u32 tmp;
1584 struct ca91cx42_driver *bridge;
1585
1586 bridge = ca91cx42_bridge->driver_priv;
1587
1588 /* Turn off CR/CSR space */
1589 tmp = ioread32(bridge->base + VCSR_CTL);
1590 tmp &= ~CA91CX42_VCSR_CTL_EN;
1591 iowrite32(tmp, bridge->base + VCSR_CTL);
1592
1593 /* Free image */
1594 iowrite32(0, bridge->base + VCSR_TO);
1595
1596 pci_free_consistent(pdev, VME_CRCSR_BUF_SIZE, bridge->crcsr_kernel,
1597 bridge->crcsr_bus);
1598 }
1599
1600 static int ca91cx42_probe(struct pci_dev *pdev, const struct pci_device_id *id)
1601 {
1602 int retval, i;
1603 u32 data;
1604 struct list_head *pos = NULL, *n;
1605 struct vme_bridge *ca91cx42_bridge;
1606 struct ca91cx42_driver *ca91cx42_device;
1607 struct vme_master_resource *master_image;
1608 struct vme_slave_resource *slave_image;
1609 struct vme_dma_resource *dma_ctrlr;
1610 struct vme_lm_resource *lm;
1611
1612 /* We want to support more than one of each bridge so we need to
1613 * dynamically allocate the bridge structure
1614 */
1615 ca91cx42_bridge = kzalloc(sizeof(*ca91cx42_bridge), GFP_KERNEL);
1616 if (!ca91cx42_bridge) {
1617 retval = -ENOMEM;
1618 goto err_struct;
1619 }
1620 vme_init_bridge(ca91cx42_bridge);
1621
1622 ca91cx42_device = kzalloc(sizeof(*ca91cx42_device), GFP_KERNEL);
1623 if (!ca91cx42_device) {
1624 retval = -ENOMEM;
1625 goto err_driver;
1626 }
1627
1628 ca91cx42_bridge->driver_priv = ca91cx42_device;
1629
1630 /* Enable the device */
1631 retval = pci_enable_device(pdev);
1632 if (retval) {
1633 dev_err(&pdev->dev, "Unable to enable device\n");
1634 goto err_enable;
1635 }
1636
1637 /* Map Registers */
1638 retval = pci_request_regions(pdev, driver_name);
1639 if (retval) {
1640 dev_err(&pdev->dev, "Unable to reserve resources\n");
1641 goto err_resource;
1642 }
1643
1644 /* map registers in BAR 0 */
1645 ca91cx42_device->base = ioremap_nocache(pci_resource_start(pdev, 0),
1646 4096);
1647 if (!ca91cx42_device->base) {
1648 dev_err(&pdev->dev, "Unable to remap CRG region\n");
1649 retval = -EIO;
1650 goto err_remap;
1651 }
1652
1653 /* Check to see if the mapping worked out */
1654 data = ioread32(ca91cx42_device->base + CA91CX42_PCI_ID) & 0x0000FFFF;
1655 if (data != PCI_VENDOR_ID_TUNDRA) {
1656 dev_err(&pdev->dev, "PCI_ID check failed\n");
1657 retval = -EIO;
1658 goto err_test;
1659 }
1660
1661 /* Initialize wait queues & mutual exclusion flags */
1662 init_waitqueue_head(&ca91cx42_device->dma_queue);
1663 init_waitqueue_head(&ca91cx42_device->iack_queue);
1664 mutex_init(&ca91cx42_device->vme_int);
1665 mutex_init(&ca91cx42_device->vme_rmw);
1666
1667 ca91cx42_bridge->parent = &pdev->dev;
1668 strcpy(ca91cx42_bridge->name, driver_name);
1669
1670 /* Setup IRQ */
1671 retval = ca91cx42_irq_init(ca91cx42_bridge);
1672 if (retval != 0) {
1673 dev_err(&pdev->dev, "Chip Initialization failed.\n");
1674 goto err_irq;
1675 }
1676
1677 /* Add master windows to list */
1678 for (i = 0; i < CA91C142_MAX_MASTER; i++) {
1679 master_image = kmalloc(sizeof(*master_image), GFP_KERNEL);
1680 if (!master_image) {
1681 retval = -ENOMEM;
1682 goto err_master;
1683 }
1684 master_image->parent = ca91cx42_bridge;
1685 spin_lock_init(&master_image->lock);
1686 master_image->locked = 0;
1687 master_image->number = i;
1688 master_image->address_attr = VME_A16 | VME_A24 | VME_A32 |
1689 VME_CRCSR | VME_USER1 | VME_USER2;
1690 master_image->cycle_attr = VME_SCT | VME_BLT | VME_MBLT |
1691 VME_SUPER | VME_USER | VME_PROG | VME_DATA;
1692 master_image->width_attr = VME_D8 | VME_D16 | VME_D32 | VME_D64;
1693 memset(&master_image->bus_resource, 0,
1694 sizeof(master_image->bus_resource));
1695 master_image->kern_base = NULL;
1696 list_add_tail(&master_image->list,
1697 &ca91cx42_bridge->master_resources);
1698 }
1699
1700 /* Add slave windows to list */
1701 for (i = 0; i < CA91C142_MAX_SLAVE; i++) {
1702 slave_image = kmalloc(sizeof(*slave_image), GFP_KERNEL);
1703 if (!slave_image) {
1704 retval = -ENOMEM;
1705 goto err_slave;
1706 }
1707 slave_image->parent = ca91cx42_bridge;
1708 mutex_init(&slave_image->mtx);
1709 slave_image->locked = 0;
1710 slave_image->number = i;
1711 slave_image->address_attr = VME_A24 | VME_A32 | VME_USER1 |
1712 VME_USER2;
1713
1714 /* Only windows 0 and 4 support A16 */
1715 if (i == 0 || i == 4)
1716 slave_image->address_attr |= VME_A16;
1717
1718 slave_image->cycle_attr = VME_SCT | VME_BLT | VME_MBLT |
1719 VME_SUPER | VME_USER | VME_PROG | VME_DATA;
1720 list_add_tail(&slave_image->list,
1721 &ca91cx42_bridge->slave_resources);
1722 }
1723
1724 /* Add dma engines to list */
1725 for (i = 0; i < CA91C142_MAX_DMA; i++) {
1726 dma_ctrlr = kmalloc(sizeof(*dma_ctrlr), GFP_KERNEL);
1727 if (!dma_ctrlr) {
1728 retval = -ENOMEM;
1729 goto err_dma;
1730 }
1731 dma_ctrlr->parent = ca91cx42_bridge;
1732 mutex_init(&dma_ctrlr->mtx);
1733 dma_ctrlr->locked = 0;
1734 dma_ctrlr->number = i;
1735 dma_ctrlr->route_attr = VME_DMA_VME_TO_MEM |
1736 VME_DMA_MEM_TO_VME;
1737 INIT_LIST_HEAD(&dma_ctrlr->pending);
1738 INIT_LIST_HEAD(&dma_ctrlr->running);
1739 list_add_tail(&dma_ctrlr->list,
1740 &ca91cx42_bridge->dma_resources);
1741 }
1742
1743 /* Add location monitor to list */
1744 lm = kmalloc(sizeof(*lm), GFP_KERNEL);
1745 if (!lm) {
1746 retval = -ENOMEM;
1747 goto err_lm;
1748 }
1749 lm->parent = ca91cx42_bridge;
1750 mutex_init(&lm->mtx);
1751 lm->locked = 0;
1752 lm->number = 1;
1753 lm->monitors = 4;
1754 list_add_tail(&lm->list, &ca91cx42_bridge->lm_resources);
1755
1756 ca91cx42_bridge->slave_get = ca91cx42_slave_get;
1757 ca91cx42_bridge->slave_set = ca91cx42_slave_set;
1758 ca91cx42_bridge->master_get = ca91cx42_master_get;
1759 ca91cx42_bridge->master_set = ca91cx42_master_set;
1760 ca91cx42_bridge->master_read = ca91cx42_master_read;
1761 ca91cx42_bridge->master_write = ca91cx42_master_write;
1762 ca91cx42_bridge->master_rmw = ca91cx42_master_rmw;
1763 ca91cx42_bridge->dma_list_add = ca91cx42_dma_list_add;
1764 ca91cx42_bridge->dma_list_exec = ca91cx42_dma_list_exec;
1765 ca91cx42_bridge->dma_list_empty = ca91cx42_dma_list_empty;
1766 ca91cx42_bridge->irq_set = ca91cx42_irq_set;
1767 ca91cx42_bridge->irq_generate = ca91cx42_irq_generate;
1768 ca91cx42_bridge->lm_set = ca91cx42_lm_set;
1769 ca91cx42_bridge->lm_get = ca91cx42_lm_get;
1770 ca91cx42_bridge->lm_attach = ca91cx42_lm_attach;
1771 ca91cx42_bridge->lm_detach = ca91cx42_lm_detach;
1772 ca91cx42_bridge->slot_get = ca91cx42_slot_get;
1773 ca91cx42_bridge->alloc_consistent = ca91cx42_alloc_consistent;
1774 ca91cx42_bridge->free_consistent = ca91cx42_free_consistent;
1775
1776 data = ioread32(ca91cx42_device->base + MISC_CTL);
1777 dev_info(&pdev->dev, "Board is%s the VME system controller\n",
1778 (data & CA91CX42_MISC_CTL_SYSCON) ? "" : " not");
1779 dev_info(&pdev->dev, "Slot ID is %d\n",
1780 ca91cx42_slot_get(ca91cx42_bridge));
1781
1782 if (ca91cx42_crcsr_init(ca91cx42_bridge, pdev))
1783 dev_err(&pdev->dev, "CR/CSR configuration failed.\n");
1784
1785 /* Need to save ca91cx42_bridge pointer locally in link list for use in
1786 * ca91cx42_remove()
1787 */
1788 retval = vme_register_bridge(ca91cx42_bridge);
1789 if (retval != 0) {
1790 dev_err(&pdev->dev, "Chip Registration failed.\n");
1791 goto err_reg;
1792 }
1793
1794 pci_set_drvdata(pdev, ca91cx42_bridge);
1795
1796 return 0;
1797
1798 err_reg:
1799 ca91cx42_crcsr_exit(ca91cx42_bridge, pdev);
1800 err_lm:
1801 /* resources are stored in link list */
1802 list_for_each_safe(pos, n, &ca91cx42_bridge->lm_resources) {
1803 lm = list_entry(pos, struct vme_lm_resource, list);
1804 list_del(pos);
1805 kfree(lm);
1806 }
1807 err_dma:
1808 /* resources are stored in link list */
1809 list_for_each_safe(pos, n, &ca91cx42_bridge->dma_resources) {
1810 dma_ctrlr = list_entry(pos, struct vme_dma_resource, list);
1811 list_del(pos);
1812 kfree(dma_ctrlr);
1813 }
1814 err_slave:
1815 /* resources are stored in link list */
1816 list_for_each_safe(pos, n, &ca91cx42_bridge->slave_resources) {
1817 slave_image = list_entry(pos, struct vme_slave_resource, list);
1818 list_del(pos);
1819 kfree(slave_image);
1820 }
1821 err_master:
1822 /* resources are stored in link list */
1823 list_for_each_safe(pos, n, &ca91cx42_bridge->master_resources) {
1824 master_image = list_entry(pos, struct vme_master_resource,
1825 list);
1826 list_del(pos);
1827 kfree(master_image);
1828 }
1829
1830 ca91cx42_irq_exit(ca91cx42_device, pdev);
1831 err_irq:
1832 err_test:
1833 iounmap(ca91cx42_device->base);
1834 err_remap:
1835 pci_release_regions(pdev);
1836 err_resource:
1837 pci_disable_device(pdev);
1838 err_enable:
1839 kfree(ca91cx42_device);
1840 err_driver:
1841 kfree(ca91cx42_bridge);
1842 err_struct:
1843 return retval;
1844
1845 }
1846
1847 static void ca91cx42_remove(struct pci_dev *pdev)
1848 {
1849 struct list_head *pos = NULL, *n;
1850 struct vme_master_resource *master_image;
1851 struct vme_slave_resource *slave_image;
1852 struct vme_dma_resource *dma_ctrlr;
1853 struct vme_lm_resource *lm;
1854 struct ca91cx42_driver *bridge;
1855 struct vme_bridge *ca91cx42_bridge = pci_get_drvdata(pdev);
1856
1857 bridge = ca91cx42_bridge->driver_priv;
1858
1859
1860 /* Turn off Ints */
1861 iowrite32(0, bridge->base + LINT_EN);
1862
1863 /* Turn off the windows */
1864 iowrite32(0x00800000, bridge->base + LSI0_CTL);
1865 iowrite32(0x00800000, bridge->base + LSI1_CTL);
1866 iowrite32(0x00800000, bridge->base + LSI2_CTL);
1867 iowrite32(0x00800000, bridge->base + LSI3_CTL);
1868 iowrite32(0x00800000, bridge->base + LSI4_CTL);
1869 iowrite32(0x00800000, bridge->base + LSI5_CTL);
1870 iowrite32(0x00800000, bridge->base + LSI6_CTL);
1871 iowrite32(0x00800000, bridge->base + LSI7_CTL);
1872 iowrite32(0x00F00000, bridge->base + VSI0_CTL);
1873 iowrite32(0x00F00000, bridge->base + VSI1_CTL);
1874 iowrite32(0x00F00000, bridge->base + VSI2_CTL);
1875 iowrite32(0x00F00000, bridge->base + VSI3_CTL);
1876 iowrite32(0x00F00000, bridge->base + VSI4_CTL);
1877 iowrite32(0x00F00000, bridge->base + VSI5_CTL);
1878 iowrite32(0x00F00000, bridge->base + VSI6_CTL);
1879 iowrite32(0x00F00000, bridge->base + VSI7_CTL);
1880
1881 vme_unregister_bridge(ca91cx42_bridge);
1882
1883 ca91cx42_crcsr_exit(ca91cx42_bridge, pdev);
1884
1885 /* resources are stored in link list */
1886 list_for_each_safe(pos, n, &ca91cx42_bridge->lm_resources) {
1887 lm = list_entry(pos, struct vme_lm_resource, list);
1888 list_del(pos);
1889 kfree(lm);
1890 }
1891
1892 /* resources are stored in link list */
1893 list_for_each_safe(pos, n, &ca91cx42_bridge->dma_resources) {
1894 dma_ctrlr = list_entry(pos, struct vme_dma_resource, list);
1895 list_del(pos);
1896 kfree(dma_ctrlr);
1897 }
1898
1899 /* resources are stored in link list */
1900 list_for_each_safe(pos, n, &ca91cx42_bridge->slave_resources) {
1901 slave_image = list_entry(pos, struct vme_slave_resource, list);
1902 list_del(pos);
1903 kfree(slave_image);
1904 }
1905
1906 /* resources are stored in link list */
1907 list_for_each_safe(pos, n, &ca91cx42_bridge->master_resources) {
1908 master_image = list_entry(pos, struct vme_master_resource,
1909 list);
1910 list_del(pos);
1911 kfree(master_image);
1912 }
1913
1914 ca91cx42_irq_exit(bridge, pdev);
1915
1916 iounmap(bridge->base);
1917
1918 pci_release_regions(pdev);
1919
1920 pci_disable_device(pdev);
1921
1922 kfree(ca91cx42_bridge);
1923 }
1924
1925 module_pci_driver(ca91cx42_driver);
1926
1927 MODULE_PARM_DESC(geoid, "Override geographical addressing");
1928 module_param(geoid, int, 0);
1929
1930 MODULE_DESCRIPTION("VME driver for the Tundra Universe II VME bridge");
1931 MODULE_LICENSE("GPL");
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