Version:  2.0.40 2.2.26 2.4.37 2.6.39 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15

Linux/drivers/vme/bridges/vme_tsi148.c

  1 /*
  2  * Support for the Tundra TSI148 VME-PCI Bridge Chip
  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  * This program is free software; you can redistribute  it and/or modify it
 11  * under  the terms of  the GNU General  Public License as published by the
 12  * Free Software Foundation;  either version 2 of the  License, or (at your
 13  * option) any later version.
 14  */
 15 
 16 #include <linux/module.h>
 17 #include <linux/moduleparam.h>
 18 #include <linux/mm.h>
 19 #include <linux/types.h>
 20 #include <linux/errno.h>
 21 #include <linux/proc_fs.h>
 22 #include <linux/pci.h>
 23 #include <linux/poll.h>
 24 #include <linux/dma-mapping.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/byteorder/generic.h>
 33 #include <linux/vme.h>
 34 
 35 #include "../vme_bridge.h"
 36 #include "vme_tsi148.h"
 37 
 38 static int tsi148_probe(struct pci_dev *, const struct pci_device_id *);
 39 static void tsi148_remove(struct pci_dev *);
 40 
 41 
 42 /* Module parameter */
 43 static bool err_chk;
 44 static int geoid;
 45 
 46 static const char driver_name[] = "vme_tsi148";
 47 
 48 static const struct pci_device_id tsi148_ids[] = {
 49         { PCI_DEVICE(PCI_VENDOR_ID_TUNDRA, PCI_DEVICE_ID_TUNDRA_TSI148) },
 50         { },
 51 };
 52 
 53 static struct pci_driver tsi148_driver = {
 54         .name = driver_name,
 55         .id_table = tsi148_ids,
 56         .probe = tsi148_probe,
 57         .remove = tsi148_remove,
 58 };
 59 
 60 static void reg_join(unsigned int high, unsigned int low,
 61         unsigned long long *variable)
 62 {
 63         *variable = (unsigned long long)high << 32;
 64         *variable |= (unsigned long long)low;
 65 }
 66 
 67 static void reg_split(unsigned long long variable, unsigned int *high,
 68         unsigned int *low)
 69 {
 70         *low = (unsigned int)variable & 0xFFFFFFFF;
 71         *high = (unsigned int)(variable >> 32);
 72 }
 73 
 74 /*
 75  * Wakes up DMA queue.
 76  */
 77 static u32 tsi148_DMA_irqhandler(struct tsi148_driver *bridge,
 78         int channel_mask)
 79 {
 80         u32 serviced = 0;
 81 
 82         if (channel_mask & TSI148_LCSR_INTS_DMA0S) {
 83                 wake_up(&bridge->dma_queue[0]);
 84                 serviced |= TSI148_LCSR_INTC_DMA0C;
 85         }
 86         if (channel_mask & TSI148_LCSR_INTS_DMA1S) {
 87                 wake_up(&bridge->dma_queue[1]);
 88                 serviced |= TSI148_LCSR_INTC_DMA1C;
 89         }
 90 
 91         return serviced;
 92 }
 93 
 94 /*
 95  * Wake up location monitor queue
 96  */
 97 static u32 tsi148_LM_irqhandler(struct tsi148_driver *bridge, u32 stat)
 98 {
 99         int i;
100         u32 serviced = 0;
101 
102         for (i = 0; i < 4; i++) {
103                 if (stat & TSI148_LCSR_INTS_LMS[i]) {
104                         /* We only enable interrupts if the callback is set */
105                         bridge->lm_callback[i](i);
106                         serviced |= TSI148_LCSR_INTC_LMC[i];
107                 }
108         }
109 
110         return serviced;
111 }
112 
113 /*
114  * Wake up mail box queue.
115  *
116  * XXX This functionality is not exposed up though API.
117  */
118 static u32 tsi148_MB_irqhandler(struct vme_bridge *tsi148_bridge, u32 stat)
119 {
120         int i;
121         u32 val;
122         u32 serviced = 0;
123         struct tsi148_driver *bridge;
124 
125         bridge = tsi148_bridge->driver_priv;
126 
127         for (i = 0; i < 4; i++) {
128                 if (stat & TSI148_LCSR_INTS_MBS[i]) {
129                         val = ioread32be(bridge->base + TSI148_GCSR_MBOX[i]);
130                         dev_err(tsi148_bridge->parent, "VME Mailbox %d received"
131                                 ": 0x%x\n", i, val);
132                         serviced |= TSI148_LCSR_INTC_MBC[i];
133                 }
134         }
135 
136         return serviced;
137 }
138 
139 /*
140  * Display error & status message when PERR (PCI) exception interrupt occurs.
141  */
142 static u32 tsi148_PERR_irqhandler(struct vme_bridge *tsi148_bridge)
143 {
144         struct tsi148_driver *bridge;
145 
146         bridge = tsi148_bridge->driver_priv;
147 
148         dev_err(tsi148_bridge->parent, "PCI Exception at address: 0x%08x:%08x, "
149                 "attributes: %08x\n",
150                 ioread32be(bridge->base + TSI148_LCSR_EDPAU),
151                 ioread32be(bridge->base + TSI148_LCSR_EDPAL),
152                 ioread32be(bridge->base + TSI148_LCSR_EDPAT));
153 
154         dev_err(tsi148_bridge->parent, "PCI-X attribute reg: %08x, PCI-X split "
155                 "completion reg: %08x\n",
156                 ioread32be(bridge->base + TSI148_LCSR_EDPXA),
157                 ioread32be(bridge->base + TSI148_LCSR_EDPXS));
158 
159         iowrite32be(TSI148_LCSR_EDPAT_EDPCL, bridge->base + TSI148_LCSR_EDPAT);
160 
161         return TSI148_LCSR_INTC_PERRC;
162 }
163 
164 /*
165  * Save address and status when VME error interrupt occurs.
166  */
167 static u32 tsi148_VERR_irqhandler(struct vme_bridge *tsi148_bridge)
168 {
169         unsigned int error_addr_high, error_addr_low;
170         unsigned long long error_addr;
171         u32 error_attrib;
172         struct vme_bus_error *error = NULL;
173         struct tsi148_driver *bridge;
174 
175         bridge = tsi148_bridge->driver_priv;
176 
177         error_addr_high = ioread32be(bridge->base + TSI148_LCSR_VEAU);
178         error_addr_low = ioread32be(bridge->base + TSI148_LCSR_VEAL);
179         error_attrib = ioread32be(bridge->base + TSI148_LCSR_VEAT);
180 
181         reg_join(error_addr_high, error_addr_low, &error_addr);
182 
183         /* Check for exception register overflow (we have lost error data) */
184         if (error_attrib & TSI148_LCSR_VEAT_VEOF) {
185                 dev_err(tsi148_bridge->parent, "VME Bus Exception Overflow "
186                         "Occurred\n");
187         }
188 
189         if (err_chk) {
190                 error = kmalloc(sizeof(struct vme_bus_error), GFP_ATOMIC);
191                 if (error) {
192                         error->address = error_addr;
193                         error->attributes = error_attrib;
194                         list_add_tail(&error->list, &tsi148_bridge->vme_errors);
195                 } else {
196                         dev_err(tsi148_bridge->parent,
197                                 "Unable to alloc memory for VMEbus Error reporting\n");
198                 }
199         }
200 
201         if (!error) {
202                 dev_err(tsi148_bridge->parent,
203                         "VME Bus Error at address: 0x%llx, attributes: %08x\n",
204                         error_addr, error_attrib);
205         }
206 
207         /* Clear Status */
208         iowrite32be(TSI148_LCSR_VEAT_VESCL, bridge->base + TSI148_LCSR_VEAT);
209 
210         return TSI148_LCSR_INTC_VERRC;
211 }
212 
213 /*
214  * Wake up IACK queue.
215  */
216 static u32 tsi148_IACK_irqhandler(struct tsi148_driver *bridge)
217 {
218         wake_up(&bridge->iack_queue);
219 
220         return TSI148_LCSR_INTC_IACKC;
221 }
222 
223 /*
224  * Calling VME bus interrupt callback if provided.
225  */
226 static u32 tsi148_VIRQ_irqhandler(struct vme_bridge *tsi148_bridge,
227         u32 stat)
228 {
229         int vec, i, serviced = 0;
230         struct tsi148_driver *bridge;
231 
232         bridge = tsi148_bridge->driver_priv;
233 
234         for (i = 7; i > 0; i--) {
235                 if (stat & (1 << i)) {
236                         /*
237                          * Note: Even though the registers are defined as
238                          * 32-bits in the spec, we only want to issue 8-bit
239                          * IACK cycles on the bus, read from offset 3.
240                          */
241                         vec = ioread8(bridge->base + TSI148_LCSR_VIACK[i] + 3);
242 
243                         vme_irq_handler(tsi148_bridge, i, vec);
244 
245                         serviced |= (1 << i);
246                 }
247         }
248 
249         return serviced;
250 }
251 
252 /*
253  * Top level interrupt handler.  Clears appropriate interrupt status bits and
254  * then calls appropriate sub handler(s).
255  */
256 static irqreturn_t tsi148_irqhandler(int irq, void *ptr)
257 {
258         u32 stat, enable, serviced = 0;
259         struct vme_bridge *tsi148_bridge;
260         struct tsi148_driver *bridge;
261 
262         tsi148_bridge = ptr;
263 
264         bridge = tsi148_bridge->driver_priv;
265 
266         /* Determine which interrupts are unmasked and set */
267         enable = ioread32be(bridge->base + TSI148_LCSR_INTEO);
268         stat = ioread32be(bridge->base + TSI148_LCSR_INTS);
269 
270         /* Only look at unmasked interrupts */
271         stat &= enable;
272 
273         if (unlikely(!stat))
274                 return IRQ_NONE;
275 
276         /* Call subhandlers as appropriate */
277         /* DMA irqs */
278         if (stat & (TSI148_LCSR_INTS_DMA1S | TSI148_LCSR_INTS_DMA0S))
279                 serviced |= tsi148_DMA_irqhandler(bridge, stat);
280 
281         /* Location monitor irqs */
282         if (stat & (TSI148_LCSR_INTS_LM3S | TSI148_LCSR_INTS_LM2S |
283                         TSI148_LCSR_INTS_LM1S | TSI148_LCSR_INTS_LM0S))
284                 serviced |= tsi148_LM_irqhandler(bridge, stat);
285 
286         /* Mail box irqs */
287         if (stat & (TSI148_LCSR_INTS_MB3S | TSI148_LCSR_INTS_MB2S |
288                         TSI148_LCSR_INTS_MB1S | TSI148_LCSR_INTS_MB0S))
289                 serviced |= tsi148_MB_irqhandler(tsi148_bridge, stat);
290 
291         /* PCI bus error */
292         if (stat & TSI148_LCSR_INTS_PERRS)
293                 serviced |= tsi148_PERR_irqhandler(tsi148_bridge);
294 
295         /* VME bus error */
296         if (stat & TSI148_LCSR_INTS_VERRS)
297                 serviced |= tsi148_VERR_irqhandler(tsi148_bridge);
298 
299         /* IACK irq */
300         if (stat & TSI148_LCSR_INTS_IACKS)
301                 serviced |= tsi148_IACK_irqhandler(bridge);
302 
303         /* VME bus irqs */
304         if (stat & (TSI148_LCSR_INTS_IRQ7S | TSI148_LCSR_INTS_IRQ6S |
305                         TSI148_LCSR_INTS_IRQ5S | TSI148_LCSR_INTS_IRQ4S |
306                         TSI148_LCSR_INTS_IRQ3S | TSI148_LCSR_INTS_IRQ2S |
307                         TSI148_LCSR_INTS_IRQ1S))
308                 serviced |= tsi148_VIRQ_irqhandler(tsi148_bridge, stat);
309 
310         /* Clear serviced interrupts */
311         iowrite32be(serviced, bridge->base + TSI148_LCSR_INTC);
312 
313         return IRQ_HANDLED;
314 }
315 
316 static int tsi148_irq_init(struct vme_bridge *tsi148_bridge)
317 {
318         int result;
319         unsigned int tmp;
320         struct pci_dev *pdev;
321         struct tsi148_driver *bridge;
322 
323         pdev = to_pci_dev(tsi148_bridge->parent);
324 
325         bridge = tsi148_bridge->driver_priv;
326 
327         /* Initialise list for VME bus errors */
328         INIT_LIST_HEAD(&tsi148_bridge->vme_errors);
329 
330         mutex_init(&tsi148_bridge->irq_mtx);
331 
332         result = request_irq(pdev->irq,
333                              tsi148_irqhandler,
334                              IRQF_SHARED,
335                              driver_name, tsi148_bridge);
336         if (result) {
337                 dev_err(tsi148_bridge->parent, "Can't get assigned pci irq "
338                         "vector %02X\n", pdev->irq);
339                 return result;
340         }
341 
342         /* Enable and unmask interrupts */
343         tmp = TSI148_LCSR_INTEO_DMA1EO | TSI148_LCSR_INTEO_DMA0EO |
344                 TSI148_LCSR_INTEO_MB3EO | TSI148_LCSR_INTEO_MB2EO |
345                 TSI148_LCSR_INTEO_MB1EO | TSI148_LCSR_INTEO_MB0EO |
346                 TSI148_LCSR_INTEO_PERREO | TSI148_LCSR_INTEO_VERREO |
347                 TSI148_LCSR_INTEO_IACKEO;
348 
349         /* This leaves the following interrupts masked.
350          * TSI148_LCSR_INTEO_VIEEO
351          * TSI148_LCSR_INTEO_SYSFLEO
352          * TSI148_LCSR_INTEO_ACFLEO
353          */
354 
355         /* Don't enable Location Monitor interrupts here - they will be
356          * enabled when the location monitors are properly configured and
357          * a callback has been attached.
358          * TSI148_LCSR_INTEO_LM0EO
359          * TSI148_LCSR_INTEO_LM1EO
360          * TSI148_LCSR_INTEO_LM2EO
361          * TSI148_LCSR_INTEO_LM3EO
362          */
363 
364         /* Don't enable VME interrupts until we add a handler, else the board
365          * will respond to it and we don't want that unless it knows how to
366          * properly deal with it.
367          * TSI148_LCSR_INTEO_IRQ7EO
368          * TSI148_LCSR_INTEO_IRQ6EO
369          * TSI148_LCSR_INTEO_IRQ5EO
370          * TSI148_LCSR_INTEO_IRQ4EO
371          * TSI148_LCSR_INTEO_IRQ3EO
372          * TSI148_LCSR_INTEO_IRQ2EO
373          * TSI148_LCSR_INTEO_IRQ1EO
374          */
375 
376         iowrite32be(tmp, bridge->base + TSI148_LCSR_INTEO);
377         iowrite32be(tmp, bridge->base + TSI148_LCSR_INTEN);
378 
379         return 0;
380 }
381 
382 static void tsi148_irq_exit(struct vme_bridge *tsi148_bridge,
383         struct pci_dev *pdev)
384 {
385         struct tsi148_driver *bridge = tsi148_bridge->driver_priv;
386 
387         /* Turn off interrupts */
388         iowrite32be(0x0, bridge->base + TSI148_LCSR_INTEO);
389         iowrite32be(0x0, bridge->base + TSI148_LCSR_INTEN);
390 
391         /* Clear all interrupts */
392         iowrite32be(0xFFFFFFFF, bridge->base + TSI148_LCSR_INTC);
393 
394         /* Detach interrupt handler */
395         free_irq(pdev->irq, tsi148_bridge);
396 }
397 
398 /*
399  * Check to see if an IACk has been received, return true (1) or false (0).
400  */
401 static int tsi148_iack_received(struct tsi148_driver *bridge)
402 {
403         u32 tmp;
404 
405         tmp = ioread32be(bridge->base + TSI148_LCSR_VICR);
406 
407         if (tmp & TSI148_LCSR_VICR_IRQS)
408                 return 0;
409         else
410                 return 1;
411 }
412 
413 /*
414  * Configure VME interrupt
415  */
416 static void tsi148_irq_set(struct vme_bridge *tsi148_bridge, int level,
417         int state, int sync)
418 {
419         struct pci_dev *pdev;
420         u32 tmp;
421         struct tsi148_driver *bridge;
422 
423         bridge = tsi148_bridge->driver_priv;
424 
425         /* We need to do the ordering differently for enabling and disabling */
426         if (state == 0) {
427                 tmp = ioread32be(bridge->base + TSI148_LCSR_INTEN);
428                 tmp &= ~TSI148_LCSR_INTEN_IRQEN[level - 1];
429                 iowrite32be(tmp, bridge->base + TSI148_LCSR_INTEN);
430 
431                 tmp = ioread32be(bridge->base + TSI148_LCSR_INTEO);
432                 tmp &= ~TSI148_LCSR_INTEO_IRQEO[level - 1];
433                 iowrite32be(tmp, bridge->base + TSI148_LCSR_INTEO);
434 
435                 if (sync != 0) {
436                         pdev = to_pci_dev(tsi148_bridge->parent);
437                         synchronize_irq(pdev->irq);
438                 }
439         } else {
440                 tmp = ioread32be(bridge->base + TSI148_LCSR_INTEO);
441                 tmp |= TSI148_LCSR_INTEO_IRQEO[level - 1];
442                 iowrite32be(tmp, bridge->base + TSI148_LCSR_INTEO);
443 
444                 tmp = ioread32be(bridge->base + TSI148_LCSR_INTEN);
445                 tmp |= TSI148_LCSR_INTEN_IRQEN[level - 1];
446                 iowrite32be(tmp, bridge->base + TSI148_LCSR_INTEN);
447         }
448 }
449 
450 /*
451  * Generate a VME bus interrupt at the requested level & vector. Wait for
452  * interrupt to be acked.
453  */
454 static int tsi148_irq_generate(struct vme_bridge *tsi148_bridge, int level,
455         int statid)
456 {
457         u32 tmp;
458         struct tsi148_driver *bridge;
459 
460         bridge = tsi148_bridge->driver_priv;
461 
462         mutex_lock(&bridge->vme_int);
463 
464         /* Read VICR register */
465         tmp = ioread32be(bridge->base + TSI148_LCSR_VICR);
466 
467         /* Set Status/ID */
468         tmp = (tmp & ~TSI148_LCSR_VICR_STID_M) |
469                 (statid & TSI148_LCSR_VICR_STID_M);
470         iowrite32be(tmp, bridge->base + TSI148_LCSR_VICR);
471 
472         /* Assert VMEbus IRQ */
473         tmp = tmp | TSI148_LCSR_VICR_IRQL[level];
474         iowrite32be(tmp, bridge->base + TSI148_LCSR_VICR);
475 
476         /* XXX Consider implementing a timeout? */
477         wait_event_interruptible(bridge->iack_queue,
478                 tsi148_iack_received(bridge));
479 
480         mutex_unlock(&bridge->vme_int);
481 
482         return 0;
483 }
484 
485 /*
486  * Find the first error in this address range
487  */
488 static struct vme_bus_error *tsi148_find_error(struct vme_bridge *tsi148_bridge,
489         u32 aspace, unsigned long long address, size_t count)
490 {
491         struct list_head *err_pos;
492         struct vme_bus_error *vme_err, *valid = NULL;
493         unsigned long long bound;
494 
495         bound = address + count;
496 
497         /*
498          * XXX We are currently not looking at the address space when parsing
499          *     for errors. This is because parsing the Address Modifier Codes
500          *     is going to be quite resource intensive to do properly. We
501          *     should be OK just looking at the addresses and this is certainly
502          *     much better than what we had before.
503          */
504         err_pos = NULL;
505         /* Iterate through errors */
506         list_for_each(err_pos, &tsi148_bridge->vme_errors) {
507                 vme_err = list_entry(err_pos, struct vme_bus_error, list);
508                 if ((vme_err->address >= address) &&
509                         (vme_err->address < bound)) {
510 
511                         valid = vme_err;
512                         break;
513                 }
514         }
515 
516         return valid;
517 }
518 
519 /*
520  * Clear errors in the provided address range.
521  */
522 static void tsi148_clear_errors(struct vme_bridge *tsi148_bridge,
523         u32 aspace, unsigned long long address, size_t count)
524 {
525         struct list_head *err_pos, *temp;
526         struct vme_bus_error *vme_err;
527         unsigned long long bound;
528 
529         bound = address + count;
530 
531         /*
532          * XXX We are currently not looking at the address space when parsing
533          *     for errors. This is because parsing the Address Modifier Codes
534          *     is going to be quite resource intensive to do properly. We
535          *     should be OK just looking at the addresses and this is certainly
536          *     much better than what we had before.
537          */
538         err_pos = NULL;
539         /* Iterate through errors */
540         list_for_each_safe(err_pos, temp, &tsi148_bridge->vme_errors) {
541                 vme_err = list_entry(err_pos, struct vme_bus_error, list);
542 
543                 if ((vme_err->address >= address) &&
544                         (vme_err->address < bound)) {
545 
546                         list_del(err_pos);
547                         kfree(vme_err);
548                 }
549         }
550 }
551 
552 /*
553  * Initialize a slave window with the requested attributes.
554  */
555 static int tsi148_slave_set(struct vme_slave_resource *image, int enabled,
556         unsigned long long vme_base, unsigned long long size,
557         dma_addr_t pci_base, u32 aspace, u32 cycle)
558 {
559         unsigned int i, addr = 0, granularity = 0;
560         unsigned int temp_ctl = 0;
561         unsigned int vme_base_low, vme_base_high;
562         unsigned int vme_bound_low, vme_bound_high;
563         unsigned int pci_offset_low, pci_offset_high;
564         unsigned long long vme_bound, pci_offset;
565         struct vme_bridge *tsi148_bridge;
566         struct tsi148_driver *bridge;
567 
568         tsi148_bridge = image->parent;
569         bridge = tsi148_bridge->driver_priv;
570 
571         i = image->number;
572 
573         switch (aspace) {
574         case VME_A16:
575                 granularity = 0x10;
576                 addr |= TSI148_LCSR_ITAT_AS_A16;
577                 break;
578         case VME_A24:
579                 granularity = 0x1000;
580                 addr |= TSI148_LCSR_ITAT_AS_A24;
581                 break;
582         case VME_A32:
583                 granularity = 0x10000;
584                 addr |= TSI148_LCSR_ITAT_AS_A32;
585                 break;
586         case VME_A64:
587                 granularity = 0x10000;
588                 addr |= TSI148_LCSR_ITAT_AS_A64;
589                 break;
590         case VME_CRCSR:
591         case VME_USER1:
592         case VME_USER2:
593         case VME_USER3:
594         case VME_USER4:
595         default:
596                 dev_err(tsi148_bridge->parent, "Invalid address space\n");
597                 return -EINVAL;
598                 break;
599         }
600 
601         /* Convert 64-bit variables to 2x 32-bit variables */
602         reg_split(vme_base, &vme_base_high, &vme_base_low);
603 
604         /*
605          * Bound address is a valid address for the window, adjust
606          * accordingly
607          */
608         vme_bound = vme_base + size - granularity;
609         reg_split(vme_bound, &vme_bound_high, &vme_bound_low);
610         pci_offset = (unsigned long long)pci_base - vme_base;
611         reg_split(pci_offset, &pci_offset_high, &pci_offset_low);
612 
613         if (vme_base_low & (granularity - 1)) {
614                 dev_err(tsi148_bridge->parent, "Invalid VME base alignment\n");
615                 return -EINVAL;
616         }
617         if (vme_bound_low & (granularity - 1)) {
618                 dev_err(tsi148_bridge->parent, "Invalid VME bound alignment\n");
619                 return -EINVAL;
620         }
621         if (pci_offset_low & (granularity - 1)) {
622                 dev_err(tsi148_bridge->parent, "Invalid PCI Offset "
623                         "alignment\n");
624                 return -EINVAL;
625         }
626 
627         /*  Disable while we are mucking around */
628         temp_ctl = ioread32be(bridge->base + TSI148_LCSR_IT[i] +
629                 TSI148_LCSR_OFFSET_ITAT);
630         temp_ctl &= ~TSI148_LCSR_ITAT_EN;
631         iowrite32be(temp_ctl, bridge->base + TSI148_LCSR_IT[i] +
632                 TSI148_LCSR_OFFSET_ITAT);
633 
634         /* Setup mapping */
635         iowrite32be(vme_base_high, bridge->base + TSI148_LCSR_IT[i] +
636                 TSI148_LCSR_OFFSET_ITSAU);
637         iowrite32be(vme_base_low, bridge->base + TSI148_LCSR_IT[i] +
638                 TSI148_LCSR_OFFSET_ITSAL);
639         iowrite32be(vme_bound_high, bridge->base + TSI148_LCSR_IT[i] +
640                 TSI148_LCSR_OFFSET_ITEAU);
641         iowrite32be(vme_bound_low, bridge->base + TSI148_LCSR_IT[i] +
642                 TSI148_LCSR_OFFSET_ITEAL);
643         iowrite32be(pci_offset_high, bridge->base + TSI148_LCSR_IT[i] +
644                 TSI148_LCSR_OFFSET_ITOFU);
645         iowrite32be(pci_offset_low, bridge->base + TSI148_LCSR_IT[i] +
646                 TSI148_LCSR_OFFSET_ITOFL);
647 
648         /* Setup 2eSST speeds */
649         temp_ctl &= ~TSI148_LCSR_ITAT_2eSSTM_M;
650         switch (cycle & (VME_2eSST160 | VME_2eSST267 | VME_2eSST320)) {
651         case VME_2eSST160:
652                 temp_ctl |= TSI148_LCSR_ITAT_2eSSTM_160;
653                 break;
654         case VME_2eSST267:
655                 temp_ctl |= TSI148_LCSR_ITAT_2eSSTM_267;
656                 break;
657         case VME_2eSST320:
658                 temp_ctl |= TSI148_LCSR_ITAT_2eSSTM_320;
659                 break;
660         }
661 
662         /* Setup cycle types */
663         temp_ctl &= ~(0x1F << 7);
664         if (cycle & VME_BLT)
665                 temp_ctl |= TSI148_LCSR_ITAT_BLT;
666         if (cycle & VME_MBLT)
667                 temp_ctl |= TSI148_LCSR_ITAT_MBLT;
668         if (cycle & VME_2eVME)
669                 temp_ctl |= TSI148_LCSR_ITAT_2eVME;
670         if (cycle & VME_2eSST)
671                 temp_ctl |= TSI148_LCSR_ITAT_2eSST;
672         if (cycle & VME_2eSSTB)
673                 temp_ctl |= TSI148_LCSR_ITAT_2eSSTB;
674 
675         /* Setup address space */
676         temp_ctl &= ~TSI148_LCSR_ITAT_AS_M;
677         temp_ctl |= addr;
678 
679         temp_ctl &= ~0xF;
680         if (cycle & VME_SUPER)
681                 temp_ctl |= TSI148_LCSR_ITAT_SUPR ;
682         if (cycle & VME_USER)
683                 temp_ctl |= TSI148_LCSR_ITAT_NPRIV;
684         if (cycle & VME_PROG)
685                 temp_ctl |= TSI148_LCSR_ITAT_PGM;
686         if (cycle & VME_DATA)
687                 temp_ctl |= TSI148_LCSR_ITAT_DATA;
688 
689         /* Write ctl reg without enable */
690         iowrite32be(temp_ctl, bridge->base + TSI148_LCSR_IT[i] +
691                 TSI148_LCSR_OFFSET_ITAT);
692 
693         if (enabled)
694                 temp_ctl |= TSI148_LCSR_ITAT_EN;
695 
696         iowrite32be(temp_ctl, bridge->base + TSI148_LCSR_IT[i] +
697                 TSI148_LCSR_OFFSET_ITAT);
698 
699         return 0;
700 }
701 
702 /*
703  * Get slave window configuration.
704  */
705 static int tsi148_slave_get(struct vme_slave_resource *image, int *enabled,
706         unsigned long long *vme_base, unsigned long long *size,
707         dma_addr_t *pci_base, u32 *aspace, u32 *cycle)
708 {
709         unsigned int i, granularity = 0, ctl = 0;
710         unsigned int vme_base_low, vme_base_high;
711         unsigned int vme_bound_low, vme_bound_high;
712         unsigned int pci_offset_low, pci_offset_high;
713         unsigned long long vme_bound, pci_offset;
714         struct tsi148_driver *bridge;
715 
716         bridge = image->parent->driver_priv;
717 
718         i = image->number;
719 
720         /* Read registers */
721         ctl = ioread32be(bridge->base + TSI148_LCSR_IT[i] +
722                 TSI148_LCSR_OFFSET_ITAT);
723 
724         vme_base_high = ioread32be(bridge->base + TSI148_LCSR_IT[i] +
725                 TSI148_LCSR_OFFSET_ITSAU);
726         vme_base_low = ioread32be(bridge->base + TSI148_LCSR_IT[i] +
727                 TSI148_LCSR_OFFSET_ITSAL);
728         vme_bound_high = ioread32be(bridge->base + TSI148_LCSR_IT[i] +
729                 TSI148_LCSR_OFFSET_ITEAU);
730         vme_bound_low = ioread32be(bridge->base + TSI148_LCSR_IT[i] +
731                 TSI148_LCSR_OFFSET_ITEAL);
732         pci_offset_high = ioread32be(bridge->base + TSI148_LCSR_IT[i] +
733                 TSI148_LCSR_OFFSET_ITOFU);
734         pci_offset_low = ioread32be(bridge->base + TSI148_LCSR_IT[i] +
735                 TSI148_LCSR_OFFSET_ITOFL);
736 
737         /* Convert 64-bit variables to 2x 32-bit variables */
738         reg_join(vme_base_high, vme_base_low, vme_base);
739         reg_join(vme_bound_high, vme_bound_low, &vme_bound);
740         reg_join(pci_offset_high, pci_offset_low, &pci_offset);
741 
742         *pci_base = (dma_addr_t)(*vme_base + pci_offset);
743 
744         *enabled = 0;
745         *aspace = 0;
746         *cycle = 0;
747 
748         if (ctl & TSI148_LCSR_ITAT_EN)
749                 *enabled = 1;
750 
751         if ((ctl & TSI148_LCSR_ITAT_AS_M) == TSI148_LCSR_ITAT_AS_A16) {
752                 granularity = 0x10;
753                 *aspace |= VME_A16;
754         }
755         if ((ctl & TSI148_LCSR_ITAT_AS_M) == TSI148_LCSR_ITAT_AS_A24) {
756                 granularity = 0x1000;
757                 *aspace |= VME_A24;
758         }
759         if ((ctl & TSI148_LCSR_ITAT_AS_M) == TSI148_LCSR_ITAT_AS_A32) {
760                 granularity = 0x10000;
761                 *aspace |= VME_A32;
762         }
763         if ((ctl & TSI148_LCSR_ITAT_AS_M) == TSI148_LCSR_ITAT_AS_A64) {
764                 granularity = 0x10000;
765                 *aspace |= VME_A64;
766         }
767 
768         /* Need granularity before we set the size */
769         *size = (unsigned long long)((vme_bound - *vme_base) + granularity);
770 
771 
772         if ((ctl & TSI148_LCSR_ITAT_2eSSTM_M) == TSI148_LCSR_ITAT_2eSSTM_160)
773                 *cycle |= VME_2eSST160;
774         if ((ctl & TSI148_LCSR_ITAT_2eSSTM_M) == TSI148_LCSR_ITAT_2eSSTM_267)
775                 *cycle |= VME_2eSST267;
776         if ((ctl & TSI148_LCSR_ITAT_2eSSTM_M) == TSI148_LCSR_ITAT_2eSSTM_320)
777                 *cycle |= VME_2eSST320;
778 
779         if (ctl & TSI148_LCSR_ITAT_BLT)
780                 *cycle |= VME_BLT;
781         if (ctl & TSI148_LCSR_ITAT_MBLT)
782                 *cycle |= VME_MBLT;
783         if (ctl & TSI148_LCSR_ITAT_2eVME)
784                 *cycle |= VME_2eVME;
785         if (ctl & TSI148_LCSR_ITAT_2eSST)
786                 *cycle |= VME_2eSST;
787         if (ctl & TSI148_LCSR_ITAT_2eSSTB)
788                 *cycle |= VME_2eSSTB;
789 
790         if (ctl & TSI148_LCSR_ITAT_SUPR)
791                 *cycle |= VME_SUPER;
792         if (ctl & TSI148_LCSR_ITAT_NPRIV)
793                 *cycle |= VME_USER;
794         if (ctl & TSI148_LCSR_ITAT_PGM)
795                 *cycle |= VME_PROG;
796         if (ctl & TSI148_LCSR_ITAT_DATA)
797                 *cycle |= VME_DATA;
798 
799         return 0;
800 }
801 
802 /*
803  * Allocate and map PCI Resource
804  */
805 static int tsi148_alloc_resource(struct vme_master_resource *image,
806         unsigned long long size)
807 {
808         unsigned long long existing_size;
809         int retval = 0;
810         struct pci_dev *pdev;
811         struct vme_bridge *tsi148_bridge;
812 
813         tsi148_bridge = image->parent;
814 
815         pdev = to_pci_dev(tsi148_bridge->parent);
816 
817         existing_size = (unsigned long long)(image->bus_resource.end -
818                 image->bus_resource.start);
819 
820         /* If the existing size is OK, return */
821         if ((size != 0) && (existing_size == (size - 1)))
822                 return 0;
823 
824         if (existing_size != 0) {
825                 iounmap(image->kern_base);
826                 image->kern_base = NULL;
827                 kfree(image->bus_resource.name);
828                 release_resource(&image->bus_resource);
829                 memset(&image->bus_resource, 0, sizeof(struct resource));
830         }
831 
832         /* Exit here if size is zero */
833         if (size == 0)
834                 return 0;
835 
836         if (image->bus_resource.name == NULL) {
837                 image->bus_resource.name = kmalloc(VMENAMSIZ+3, GFP_ATOMIC);
838                 if (image->bus_resource.name == NULL) {
839                         dev_err(tsi148_bridge->parent, "Unable to allocate "
840                                 "memory for resource name\n");
841                         retval = -ENOMEM;
842                         goto err_name;
843                 }
844         }
845 
846         sprintf((char *)image->bus_resource.name, "%s.%d", tsi148_bridge->name,
847                 image->number);
848 
849         image->bus_resource.start = 0;
850         image->bus_resource.end = (unsigned long)size;
851         image->bus_resource.flags = IORESOURCE_MEM;
852 
853         retval = pci_bus_alloc_resource(pdev->bus,
854                 &image->bus_resource, size, size, PCIBIOS_MIN_MEM,
855                 0, NULL, NULL);
856         if (retval) {
857                 dev_err(tsi148_bridge->parent, "Failed to allocate mem "
858                         "resource for window %d size 0x%lx start 0x%lx\n",
859                         image->number, (unsigned long)size,
860                         (unsigned long)image->bus_resource.start);
861                 goto err_resource;
862         }
863 
864         image->kern_base = ioremap_nocache(
865                 image->bus_resource.start, size);
866         if (image->kern_base == NULL) {
867                 dev_err(tsi148_bridge->parent, "Failed to remap resource\n");
868                 retval = -ENOMEM;
869                 goto err_remap;
870         }
871 
872         return 0;
873 
874 err_remap:
875         release_resource(&image->bus_resource);
876 err_resource:
877         kfree(image->bus_resource.name);
878         memset(&image->bus_resource, 0, sizeof(struct resource));
879 err_name:
880         return retval;
881 }
882 
883 /*
884  * Free and unmap PCI Resource
885  */
886 static void tsi148_free_resource(struct vme_master_resource *image)
887 {
888         iounmap(image->kern_base);
889         image->kern_base = NULL;
890         release_resource(&image->bus_resource);
891         kfree(image->bus_resource.name);
892         memset(&image->bus_resource, 0, sizeof(struct resource));
893 }
894 
895 /*
896  * Set the attributes of an outbound window.
897  */
898 static int tsi148_master_set(struct vme_master_resource *image, int enabled,
899         unsigned long long vme_base, unsigned long long size, u32 aspace,
900         u32 cycle, u32 dwidth)
901 {
902         int retval = 0;
903         unsigned int i;
904         unsigned int temp_ctl = 0;
905         unsigned int pci_base_low, pci_base_high;
906         unsigned int pci_bound_low, pci_bound_high;
907         unsigned int vme_offset_low, vme_offset_high;
908         unsigned long long pci_bound, vme_offset, pci_base;
909         struct vme_bridge *tsi148_bridge;
910         struct tsi148_driver *bridge;
911         struct pci_bus_region region;
912         struct pci_dev *pdev;
913 
914         tsi148_bridge = image->parent;
915 
916         bridge = tsi148_bridge->driver_priv;
917 
918         pdev = to_pci_dev(tsi148_bridge->parent);
919 
920         /* Verify input data */
921         if (vme_base & 0xFFFF) {
922                 dev_err(tsi148_bridge->parent, "Invalid VME Window "
923                         "alignment\n");
924                 retval = -EINVAL;
925                 goto err_window;
926         }
927 
928         if ((size == 0) && (enabled != 0)) {
929                 dev_err(tsi148_bridge->parent, "Size must be non-zero for "
930                         "enabled windows\n");
931                 retval = -EINVAL;
932                 goto err_window;
933         }
934 
935         spin_lock(&image->lock);
936 
937         /* Let's allocate the resource here rather than further up the stack as
938          * it avoids pushing loads of bus dependent stuff up the stack. If size
939          * is zero, any existing resource will be freed.
940          */
941         retval = tsi148_alloc_resource(image, size);
942         if (retval) {
943                 spin_unlock(&image->lock);
944                 dev_err(tsi148_bridge->parent, "Unable to allocate memory for "
945                         "resource\n");
946                 goto err_res;
947         }
948 
949         if (size == 0) {
950                 pci_base = 0;
951                 pci_bound = 0;
952                 vme_offset = 0;
953         } else {
954                 pcibios_resource_to_bus(pdev->bus, &region,
955                                         &image->bus_resource);
956                 pci_base = region.start;
957 
958                 /*
959                  * Bound address is a valid address for the window, adjust
960                  * according to window granularity.
961                  */
962                 pci_bound = pci_base + (size - 0x10000);
963                 vme_offset = vme_base - pci_base;
964         }
965 
966         /* Convert 64-bit variables to 2x 32-bit variables */
967         reg_split(pci_base, &pci_base_high, &pci_base_low);
968         reg_split(pci_bound, &pci_bound_high, &pci_bound_low);
969         reg_split(vme_offset, &vme_offset_high, &vme_offset_low);
970 
971         if (pci_base_low & 0xFFFF) {
972                 spin_unlock(&image->lock);
973                 dev_err(tsi148_bridge->parent, "Invalid PCI base alignment\n");
974                 retval = -EINVAL;
975                 goto err_gran;
976         }
977         if (pci_bound_low & 0xFFFF) {
978                 spin_unlock(&image->lock);
979                 dev_err(tsi148_bridge->parent, "Invalid PCI bound alignment\n");
980                 retval = -EINVAL;
981                 goto err_gran;
982         }
983         if (vme_offset_low & 0xFFFF) {
984                 spin_unlock(&image->lock);
985                 dev_err(tsi148_bridge->parent, "Invalid VME Offset "
986                         "alignment\n");
987                 retval = -EINVAL;
988                 goto err_gran;
989         }
990 
991         i = image->number;
992 
993         /* Disable while we are mucking around */
994         temp_ctl = ioread32be(bridge->base + TSI148_LCSR_OT[i] +
995                 TSI148_LCSR_OFFSET_OTAT);
996         temp_ctl &= ~TSI148_LCSR_OTAT_EN;
997         iowrite32be(temp_ctl, bridge->base + TSI148_LCSR_OT[i] +
998                 TSI148_LCSR_OFFSET_OTAT);
999 
1000         /* Setup 2eSST speeds */
1001         temp_ctl &= ~TSI148_LCSR_OTAT_2eSSTM_M;
1002         switch (cycle & (VME_2eSST160 | VME_2eSST267 | VME_2eSST320)) {
1003         case VME_2eSST160:
1004                 temp_ctl |= TSI148_LCSR_OTAT_2eSSTM_160;
1005                 break;
1006         case VME_2eSST267:
1007                 temp_ctl |= TSI148_LCSR_OTAT_2eSSTM_267;
1008                 break;
1009         case VME_2eSST320:
1010                 temp_ctl |= TSI148_LCSR_OTAT_2eSSTM_320;
1011                 break;
1012         }
1013 
1014         /* Setup cycle types */
1015         if (cycle & VME_BLT) {
1016                 temp_ctl &= ~TSI148_LCSR_OTAT_TM_M;
1017                 temp_ctl |= TSI148_LCSR_OTAT_TM_BLT;
1018         }
1019         if (cycle & VME_MBLT) {
1020                 temp_ctl &= ~TSI148_LCSR_OTAT_TM_M;
1021                 temp_ctl |= TSI148_LCSR_OTAT_TM_MBLT;
1022         }
1023         if (cycle & VME_2eVME) {
1024                 temp_ctl &= ~TSI148_LCSR_OTAT_TM_M;
1025                 temp_ctl |= TSI148_LCSR_OTAT_TM_2eVME;
1026         }
1027         if (cycle & VME_2eSST) {
1028                 temp_ctl &= ~TSI148_LCSR_OTAT_TM_M;
1029                 temp_ctl |= TSI148_LCSR_OTAT_TM_2eSST;
1030         }
1031         if (cycle & VME_2eSSTB) {
1032                 dev_warn(tsi148_bridge->parent, "Currently not setting "
1033                         "Broadcast Select Registers\n");
1034                 temp_ctl &= ~TSI148_LCSR_OTAT_TM_M;
1035                 temp_ctl |= TSI148_LCSR_OTAT_TM_2eSSTB;
1036         }
1037 
1038         /* Setup data width */
1039         temp_ctl &= ~TSI148_LCSR_OTAT_DBW_M;
1040         switch (dwidth) {
1041         case VME_D16:
1042                 temp_ctl |= TSI148_LCSR_OTAT_DBW_16;
1043                 break;
1044         case VME_D32:
1045                 temp_ctl |= TSI148_LCSR_OTAT_DBW_32;
1046                 break;
1047         default:
1048                 spin_unlock(&image->lock);
1049                 dev_err(tsi148_bridge->parent, "Invalid data width\n");
1050                 retval = -EINVAL;
1051                 goto err_dwidth;
1052         }
1053 
1054         /* Setup address space */
1055         temp_ctl &= ~TSI148_LCSR_OTAT_AMODE_M;
1056         switch (aspace) {
1057         case VME_A16:
1058                 temp_ctl |= TSI148_LCSR_OTAT_AMODE_A16;
1059                 break;
1060         case VME_A24:
1061                 temp_ctl |= TSI148_LCSR_OTAT_AMODE_A24;
1062                 break;
1063         case VME_A32:
1064                 temp_ctl |= TSI148_LCSR_OTAT_AMODE_A32;
1065                 break;
1066         case VME_A64:
1067                 temp_ctl |= TSI148_LCSR_OTAT_AMODE_A64;
1068                 break;
1069         case VME_CRCSR:
1070                 temp_ctl |= TSI148_LCSR_OTAT_AMODE_CRCSR;
1071                 break;
1072         case VME_USER1:
1073                 temp_ctl |= TSI148_LCSR_OTAT_AMODE_USER1;
1074                 break;
1075         case VME_USER2:
1076                 temp_ctl |= TSI148_LCSR_OTAT_AMODE_USER2;
1077                 break;
1078         case VME_USER3:
1079                 temp_ctl |= TSI148_LCSR_OTAT_AMODE_USER3;
1080                 break;
1081         case VME_USER4:
1082                 temp_ctl |= TSI148_LCSR_OTAT_AMODE_USER4;
1083                 break;
1084         default:
1085                 spin_unlock(&image->lock);
1086                 dev_err(tsi148_bridge->parent, "Invalid address space\n");
1087                 retval = -EINVAL;
1088                 goto err_aspace;
1089                 break;
1090         }
1091 
1092         temp_ctl &= ~(3<<4);
1093         if (cycle & VME_SUPER)
1094                 temp_ctl |= TSI148_LCSR_OTAT_SUP;
1095         if (cycle & VME_PROG)
1096                 temp_ctl |= TSI148_LCSR_OTAT_PGM;
1097 
1098         /* Setup mapping */
1099         iowrite32be(pci_base_high, bridge->base + TSI148_LCSR_OT[i] +
1100                 TSI148_LCSR_OFFSET_OTSAU);
1101         iowrite32be(pci_base_low, bridge->base + TSI148_LCSR_OT[i] +
1102                 TSI148_LCSR_OFFSET_OTSAL);
1103         iowrite32be(pci_bound_high, bridge->base + TSI148_LCSR_OT[i] +
1104                 TSI148_LCSR_OFFSET_OTEAU);
1105         iowrite32be(pci_bound_low, bridge->base + TSI148_LCSR_OT[i] +
1106                 TSI148_LCSR_OFFSET_OTEAL);
1107         iowrite32be(vme_offset_high, bridge->base + TSI148_LCSR_OT[i] +
1108                 TSI148_LCSR_OFFSET_OTOFU);
1109         iowrite32be(vme_offset_low, bridge->base + TSI148_LCSR_OT[i] +
1110                 TSI148_LCSR_OFFSET_OTOFL);
1111 
1112         /* Write ctl reg without enable */
1113         iowrite32be(temp_ctl, bridge->base + TSI148_LCSR_OT[i] +
1114                 TSI148_LCSR_OFFSET_OTAT);
1115 
1116         if (enabled)
1117                 temp_ctl |= TSI148_LCSR_OTAT_EN;
1118 
1119         iowrite32be(temp_ctl, bridge->base + TSI148_LCSR_OT[i] +
1120                 TSI148_LCSR_OFFSET_OTAT);
1121 
1122         spin_unlock(&image->lock);
1123         return 0;
1124 
1125 err_aspace:
1126 err_dwidth:
1127 err_gran:
1128         tsi148_free_resource(image);
1129 err_res:
1130 err_window:
1131         return retval;
1132 
1133 }
1134 
1135 /*
1136  * Set the attributes of an outbound window.
1137  *
1138  * XXX Not parsing prefetch information.
1139  */
1140 static int __tsi148_master_get(struct vme_master_resource *image, int *enabled,
1141         unsigned long long *vme_base, unsigned long long *size, u32 *aspace,
1142         u32 *cycle, u32 *dwidth)
1143 {
1144         unsigned int i, ctl;
1145         unsigned int pci_base_low, pci_base_high;
1146         unsigned int pci_bound_low, pci_bound_high;
1147         unsigned int vme_offset_low, vme_offset_high;
1148 
1149         unsigned long long pci_base, pci_bound, vme_offset;
1150         struct tsi148_driver *bridge;
1151 
1152         bridge = image->parent->driver_priv;
1153 
1154         i = image->number;
1155 
1156         ctl = ioread32be(bridge->base + TSI148_LCSR_OT[i] +
1157                 TSI148_LCSR_OFFSET_OTAT);
1158 
1159         pci_base_high = ioread32be(bridge->base + TSI148_LCSR_OT[i] +
1160                 TSI148_LCSR_OFFSET_OTSAU);
1161         pci_base_low = ioread32be(bridge->base + TSI148_LCSR_OT[i] +
1162                 TSI148_LCSR_OFFSET_OTSAL);
1163         pci_bound_high = ioread32be(bridge->base + TSI148_LCSR_OT[i] +
1164                 TSI148_LCSR_OFFSET_OTEAU);
1165         pci_bound_low = ioread32be(bridge->base + TSI148_LCSR_OT[i] +
1166                 TSI148_LCSR_OFFSET_OTEAL);
1167         vme_offset_high = ioread32be(bridge->base + TSI148_LCSR_OT[i] +
1168                 TSI148_LCSR_OFFSET_OTOFU);
1169         vme_offset_low = ioread32be(bridge->base + TSI148_LCSR_OT[i] +
1170                 TSI148_LCSR_OFFSET_OTOFL);
1171 
1172         /* Convert 64-bit variables to 2x 32-bit variables */
1173         reg_join(pci_base_high, pci_base_low, &pci_base);
1174         reg_join(pci_bound_high, pci_bound_low, &pci_bound);
1175         reg_join(vme_offset_high, vme_offset_low, &vme_offset);
1176 
1177         *vme_base = pci_base + vme_offset;
1178         *size = (unsigned long long)(pci_bound - pci_base) + 0x10000;
1179 
1180         *enabled = 0;
1181         *aspace = 0;
1182         *cycle = 0;
1183         *dwidth = 0;
1184 
1185         if (ctl & TSI148_LCSR_OTAT_EN)
1186                 *enabled = 1;
1187 
1188         /* Setup address space */
1189         if ((ctl & TSI148_LCSR_OTAT_AMODE_M) == TSI148_LCSR_OTAT_AMODE_A16)
1190                 *aspace |= VME_A16;
1191         if ((ctl & TSI148_LCSR_OTAT_AMODE_M) == TSI148_LCSR_OTAT_AMODE_A24)
1192                 *aspace |= VME_A24;
1193         if ((ctl & TSI148_LCSR_OTAT_AMODE_M) == TSI148_LCSR_OTAT_AMODE_A32)
1194                 *aspace |= VME_A32;
1195         if ((ctl & TSI148_LCSR_OTAT_AMODE_M) == TSI148_LCSR_OTAT_AMODE_A64)
1196                 *aspace |= VME_A64;
1197         if ((ctl & TSI148_LCSR_OTAT_AMODE_M) == TSI148_LCSR_OTAT_AMODE_CRCSR)
1198                 *aspace |= VME_CRCSR;
1199         if ((ctl & TSI148_LCSR_OTAT_AMODE_M) == TSI148_LCSR_OTAT_AMODE_USER1)
1200                 *aspace |= VME_USER1;
1201         if ((ctl & TSI148_LCSR_OTAT_AMODE_M) == TSI148_LCSR_OTAT_AMODE_USER2)
1202                 *aspace |= VME_USER2;
1203         if ((ctl & TSI148_LCSR_OTAT_AMODE_M) == TSI148_LCSR_OTAT_AMODE_USER3)
1204                 *aspace |= VME_USER3;
1205         if ((ctl & TSI148_LCSR_OTAT_AMODE_M) == TSI148_LCSR_OTAT_AMODE_USER4)
1206                 *aspace |= VME_USER4;
1207 
1208         /* Setup 2eSST speeds */
1209         if ((ctl & TSI148_LCSR_OTAT_2eSSTM_M) == TSI148_LCSR_OTAT_2eSSTM_160)
1210                 *cycle |= VME_2eSST160;
1211         if ((ctl & TSI148_LCSR_OTAT_2eSSTM_M) == TSI148_LCSR_OTAT_2eSSTM_267)
1212                 *cycle |= VME_2eSST267;
1213         if ((ctl & TSI148_LCSR_OTAT_2eSSTM_M) == TSI148_LCSR_OTAT_2eSSTM_320)
1214                 *cycle |= VME_2eSST320;
1215 
1216         /* Setup cycle types */
1217         if ((ctl & TSI148_LCSR_OTAT_TM_M) == TSI148_LCSR_OTAT_TM_SCT)
1218                 *cycle |= VME_SCT;
1219         if ((ctl & TSI148_LCSR_OTAT_TM_M) == TSI148_LCSR_OTAT_TM_BLT)
1220                 *cycle |= VME_BLT;
1221         if ((ctl & TSI148_LCSR_OTAT_TM_M) == TSI148_LCSR_OTAT_TM_MBLT)
1222                 *cycle |= VME_MBLT;
1223         if ((ctl & TSI148_LCSR_OTAT_TM_M) == TSI148_LCSR_OTAT_TM_2eVME)
1224                 *cycle |= VME_2eVME;
1225         if ((ctl & TSI148_LCSR_OTAT_TM_M) == TSI148_LCSR_OTAT_TM_2eSST)
1226                 *cycle |= VME_2eSST;
1227         if ((ctl & TSI148_LCSR_OTAT_TM_M) == TSI148_LCSR_OTAT_TM_2eSSTB)
1228                 *cycle |= VME_2eSSTB;
1229 
1230         if (ctl & TSI148_LCSR_OTAT_SUP)
1231                 *cycle |= VME_SUPER;
1232         else
1233                 *cycle |= VME_USER;
1234 
1235         if (ctl & TSI148_LCSR_OTAT_PGM)
1236                 *cycle |= VME_PROG;
1237         else
1238                 *cycle |= VME_DATA;
1239 
1240         /* Setup data width */
1241         if ((ctl & TSI148_LCSR_OTAT_DBW_M) == TSI148_LCSR_OTAT_DBW_16)
1242                 *dwidth = VME_D16;
1243         if ((ctl & TSI148_LCSR_OTAT_DBW_M) == TSI148_LCSR_OTAT_DBW_32)
1244                 *dwidth = VME_D32;
1245 
1246         return 0;
1247 }
1248 
1249 
1250 static int tsi148_master_get(struct vme_master_resource *image, int *enabled,
1251         unsigned long long *vme_base, unsigned long long *size, u32 *aspace,
1252         u32 *cycle, u32 *dwidth)
1253 {
1254         int retval;
1255 
1256         spin_lock(&image->lock);
1257 
1258         retval = __tsi148_master_get(image, enabled, vme_base, size, aspace,
1259                 cycle, dwidth);
1260 
1261         spin_unlock(&image->lock);
1262 
1263         return retval;
1264 }
1265 
1266 static ssize_t tsi148_master_read(struct vme_master_resource *image, void *buf,
1267         size_t count, loff_t offset)
1268 {
1269         int retval, enabled;
1270         unsigned long long vme_base, size;
1271         u32 aspace, cycle, dwidth;
1272         struct vme_bus_error *vme_err = NULL;
1273         struct vme_bridge *tsi148_bridge;
1274         void __iomem *addr = image->kern_base + offset;
1275         unsigned int done = 0;
1276         unsigned int count32;
1277 
1278         tsi148_bridge = image->parent;
1279 
1280         spin_lock(&image->lock);
1281 
1282         /* The following code handles VME address alignment. We cannot use
1283          * memcpy_xxx here because it may cut data transfers in to 8-bit
1284          * cycles when D16 or D32 cycles are required on the VME bus.
1285          * On the other hand, the bridge itself assures that the maximum data
1286          * cycle configured for the transfer is used and splits it
1287          * automatically for non-aligned addresses, so we don't want the
1288          * overhead of needlessly forcing small transfers for the entire cycle.
1289          */
1290         if ((uintptr_t)addr & 0x1) {
1291                 *(u8 *)buf = ioread8(addr);
1292                 done += 1;
1293                 if (done == count)
1294                         goto out;
1295         }
1296         if ((uintptr_t)(addr + done) & 0x2) {
1297                 if ((count - done) < 2) {
1298                         *(u8 *)(buf + done) = ioread8(addr + done);
1299                         done += 1;
1300                         goto out;
1301                 } else {
1302                         *(u16 *)(buf + done) = ioread16(addr + done);
1303                         done += 2;
1304                 }
1305         }
1306 
1307         count32 = (count - done) & ~0x3;
1308         while (done < count32) {
1309                 *(u32 *)(buf + done) = ioread32(addr + done);
1310                 done += 4;
1311         }
1312 
1313         if ((count - done) & 0x2) {
1314                 *(u16 *)(buf + done) = ioread16(addr + done);
1315                 done += 2;
1316         }
1317         if ((count - done) & 0x1) {
1318                 *(u8 *)(buf + done) = ioread8(addr + done);
1319                 done += 1;
1320         }
1321 
1322 out:
1323         retval = count;
1324 
1325         if (!err_chk)
1326                 goto skip_chk;
1327 
1328         __tsi148_master_get(image, &enabled, &vme_base, &size, &aspace, &cycle,
1329                 &dwidth);
1330 
1331         vme_err = tsi148_find_error(tsi148_bridge, aspace, vme_base + offset,
1332                 count);
1333         if (vme_err != NULL) {
1334                 dev_err(image->parent->parent, "First VME read error detected "
1335                         "an at address 0x%llx\n", vme_err->address);
1336                 retval = vme_err->address - (vme_base + offset);
1337                 /* Clear down save errors in this address range */
1338                 tsi148_clear_errors(tsi148_bridge, aspace, vme_base + offset,
1339                         count);
1340         }
1341 
1342 skip_chk:
1343         spin_unlock(&image->lock);
1344 
1345         return retval;
1346 }
1347 
1348 
1349 static ssize_t tsi148_master_write(struct vme_master_resource *image, void *buf,
1350         size_t count, loff_t offset)
1351 {
1352         int retval = 0, enabled;
1353         unsigned long long vme_base, size;
1354         u32 aspace, cycle, dwidth;
1355         void __iomem *addr = image->kern_base + offset;
1356         unsigned int done = 0;
1357         unsigned int count32;
1358 
1359         struct vme_bus_error *vme_err = NULL;
1360         struct vme_bridge *tsi148_bridge;
1361         struct tsi148_driver *bridge;
1362 
1363         tsi148_bridge = image->parent;
1364 
1365         bridge = tsi148_bridge->driver_priv;
1366 
1367         spin_lock(&image->lock);
1368 
1369         /* Here we apply for the same strategy we do in master_read
1370          * function in order to assure the correct cycles.
1371          */
1372         if ((uintptr_t)addr & 0x1) {
1373                 iowrite8(*(u8 *)buf, addr);
1374                 done += 1;
1375                 if (done == count)
1376                         goto out;
1377         }
1378         if ((uintptr_t)(addr + done) & 0x2) {
1379                 if ((count - done) < 2) {
1380                         iowrite8(*(u8 *)(buf + done), addr + done);
1381                         done += 1;
1382                         goto out;
1383                 } else {
1384                         iowrite16(*(u16 *)(buf + done), addr + done);
1385                         done += 2;
1386                 }
1387         }
1388 
1389         count32 = (count - done) & ~0x3;
1390         while (done < count32) {
1391                 iowrite32(*(u32 *)(buf + done), addr + done);
1392                 done += 4;
1393         }
1394 
1395         if ((count - done) & 0x2) {
1396                 iowrite16(*(u16 *)(buf + done), addr + done);
1397                 done += 2;
1398         }
1399         if ((count - done) & 0x1) {
1400                 iowrite8(*(u8 *)(buf + done), addr + done);
1401                 done += 1;
1402         }
1403 
1404 out:
1405         retval = count;
1406 
1407         /*
1408          * Writes are posted. We need to do a read on the VME bus to flush out
1409          * all of the writes before we check for errors. We can't guarantee
1410          * that reading the data we have just written is safe. It is believed
1411          * that there isn't any read, write re-ordering, so we can read any
1412          * location in VME space, so lets read the Device ID from the tsi148's
1413          * own registers as mapped into CR/CSR space.
1414          *
1415          * We check for saved errors in the written address range/space.
1416          */
1417 
1418         if (!err_chk)
1419                 goto skip_chk;
1420 
1421         /*
1422          * Get window info first, to maximise the time that the buffers may
1423          * fluch on their own
1424          */
1425         __tsi148_master_get(image, &enabled, &vme_base, &size, &aspace, &cycle,
1426                 &dwidth);
1427 
1428         ioread16(bridge->flush_image->kern_base + 0x7F000);
1429 
1430         vme_err = tsi148_find_error(tsi148_bridge, aspace, vme_base + offset,
1431                 count);
1432         if (vme_err != NULL) {
1433                 dev_warn(tsi148_bridge->parent, "First VME write error detected"
1434                         " an at address 0x%llx\n", vme_err->address);
1435                 retval = vme_err->address - (vme_base + offset);
1436                 /* Clear down save errors in this address range */
1437                 tsi148_clear_errors(tsi148_bridge, aspace, vme_base + offset,
1438                         count);
1439         }
1440 
1441 skip_chk:
1442         spin_unlock(&image->lock);
1443 
1444         return retval;
1445 }
1446 
1447 /*
1448  * Perform an RMW cycle on the VME bus.
1449  *
1450  * Requires a previously configured master window, returns final value.
1451  */
1452 static unsigned int tsi148_master_rmw(struct vme_master_resource *image,
1453         unsigned int mask, unsigned int compare, unsigned int swap,
1454         loff_t offset)
1455 {
1456         unsigned long long pci_addr;
1457         unsigned int pci_addr_high, pci_addr_low;
1458         u32 tmp, result;
1459         int i;
1460         struct tsi148_driver *bridge;
1461 
1462         bridge = image->parent->driver_priv;
1463 
1464         /* Find the PCI address that maps to the desired VME address */
1465         i = image->number;
1466 
1467         /* Locking as we can only do one of these at a time */
1468         mutex_lock(&bridge->vme_rmw);
1469 
1470         /* Lock image */
1471         spin_lock(&image->lock);
1472 
1473         pci_addr_high = ioread32be(bridge->base + TSI148_LCSR_OT[i] +
1474                 TSI148_LCSR_OFFSET_OTSAU);
1475         pci_addr_low = ioread32be(bridge->base + TSI148_LCSR_OT[i] +
1476                 TSI148_LCSR_OFFSET_OTSAL);
1477 
1478         reg_join(pci_addr_high, pci_addr_low, &pci_addr);
1479         reg_split(pci_addr + offset, &pci_addr_high, &pci_addr_low);
1480 
1481         /* Configure registers */
1482         iowrite32be(mask, bridge->base + TSI148_LCSR_RMWEN);
1483         iowrite32be(compare, bridge->base + TSI148_LCSR_RMWC);
1484         iowrite32be(swap, bridge->base + TSI148_LCSR_RMWS);
1485         iowrite32be(pci_addr_high, bridge->base + TSI148_LCSR_RMWAU);
1486         iowrite32be(pci_addr_low, bridge->base + TSI148_LCSR_RMWAL);
1487 
1488         /* Enable RMW */
1489         tmp = ioread32be(bridge->base + TSI148_LCSR_VMCTRL);
1490         tmp |= TSI148_LCSR_VMCTRL_RMWEN;
1491         iowrite32be(tmp, bridge->base + TSI148_LCSR_VMCTRL);
1492 
1493         /* Kick process off with a read to the required address. */
1494         result = ioread32be(image->kern_base + offset);
1495 
1496         /* Disable RMW */
1497         tmp = ioread32be(bridge->base + TSI148_LCSR_VMCTRL);
1498         tmp &= ~TSI148_LCSR_VMCTRL_RMWEN;
1499         iowrite32be(tmp, bridge->base + TSI148_LCSR_VMCTRL);
1500 
1501         spin_unlock(&image->lock);
1502 
1503         mutex_unlock(&bridge->vme_rmw);
1504 
1505         return result;
1506 }
1507 
1508 static int tsi148_dma_set_vme_src_attributes(struct device *dev, __be32 *attr,
1509         u32 aspace, u32 cycle, u32 dwidth)
1510 {
1511         u32 val;
1512 
1513         val = be32_to_cpu(*attr);
1514 
1515         /* Setup 2eSST speeds */
1516         switch (cycle & (VME_2eSST160 | VME_2eSST267 | VME_2eSST320)) {
1517         case VME_2eSST160:
1518                 val |= TSI148_LCSR_DSAT_2eSSTM_160;
1519                 break;
1520         case VME_2eSST267:
1521                 val |= TSI148_LCSR_DSAT_2eSSTM_267;
1522                 break;
1523         case VME_2eSST320:
1524                 val |= TSI148_LCSR_DSAT_2eSSTM_320;
1525                 break;
1526         }
1527 
1528         /* Setup cycle types */
1529         if (cycle & VME_SCT)
1530                 val |= TSI148_LCSR_DSAT_TM_SCT;
1531 
1532         if (cycle & VME_BLT)
1533                 val |= TSI148_LCSR_DSAT_TM_BLT;
1534 
1535         if (cycle & VME_MBLT)
1536                 val |= TSI148_LCSR_DSAT_TM_MBLT;
1537 
1538         if (cycle & VME_2eVME)
1539                 val |= TSI148_LCSR_DSAT_TM_2eVME;
1540 
1541         if (cycle & VME_2eSST)
1542                 val |= TSI148_LCSR_DSAT_TM_2eSST;
1543 
1544         if (cycle & VME_2eSSTB) {
1545                 dev_err(dev, "Currently not setting Broadcast Select "
1546                         "Registers\n");
1547                 val |= TSI148_LCSR_DSAT_TM_2eSSTB;
1548         }
1549 
1550         /* Setup data width */
1551         switch (dwidth) {
1552         case VME_D16:
1553                 val |= TSI148_LCSR_DSAT_DBW_16;
1554                 break;
1555         case VME_D32:
1556                 val |= TSI148_LCSR_DSAT_DBW_32;
1557                 break;
1558         default:
1559                 dev_err(dev, "Invalid data width\n");
1560                 return -EINVAL;
1561         }
1562 
1563         /* Setup address space */
1564         switch (aspace) {
1565         case VME_A16:
1566                 val |= TSI148_LCSR_DSAT_AMODE_A16;
1567                 break;
1568         case VME_A24:
1569                 val |= TSI148_LCSR_DSAT_AMODE_A24;
1570                 break;
1571         case VME_A32:
1572                 val |= TSI148_LCSR_DSAT_AMODE_A32;
1573                 break;
1574         case VME_A64:
1575                 val |= TSI148_LCSR_DSAT_AMODE_A64;
1576                 break;
1577         case VME_CRCSR:
1578                 val |= TSI148_LCSR_DSAT_AMODE_CRCSR;
1579                 break;
1580         case VME_USER1:
1581                 val |= TSI148_LCSR_DSAT_AMODE_USER1;
1582                 break;
1583         case VME_USER2:
1584                 val |= TSI148_LCSR_DSAT_AMODE_USER2;
1585                 break;
1586         case VME_USER3:
1587                 val |= TSI148_LCSR_DSAT_AMODE_USER3;
1588                 break;
1589         case VME_USER4:
1590                 val |= TSI148_LCSR_DSAT_AMODE_USER4;
1591                 break;
1592         default:
1593                 dev_err(dev, "Invalid address space\n");
1594                 return -EINVAL;
1595                 break;
1596         }
1597 
1598         if (cycle & VME_SUPER)
1599                 val |= TSI148_LCSR_DSAT_SUP;
1600         if (cycle & VME_PROG)
1601                 val |= TSI148_LCSR_DSAT_PGM;
1602 
1603         *attr = cpu_to_be32(val);
1604 
1605         return 0;
1606 }
1607 
1608 static int tsi148_dma_set_vme_dest_attributes(struct device *dev, __be32 *attr,
1609         u32 aspace, u32 cycle, u32 dwidth)
1610 {
1611         u32 val;
1612 
1613         val = be32_to_cpu(*attr);
1614 
1615         /* Setup 2eSST speeds */
1616         switch (cycle & (VME_2eSST160 | VME_2eSST267 | VME_2eSST320)) {
1617         case VME_2eSST160:
1618                 val |= TSI148_LCSR_DDAT_2eSSTM_160;
1619                 break;
1620         case VME_2eSST267:
1621                 val |= TSI148_LCSR_DDAT_2eSSTM_267;
1622                 break;
1623         case VME_2eSST320:
1624                 val |= TSI148_LCSR_DDAT_2eSSTM_320;
1625                 break;
1626         }
1627 
1628         /* Setup cycle types */
1629         if (cycle & VME_SCT)
1630                 val |= TSI148_LCSR_DDAT_TM_SCT;
1631 
1632         if (cycle & VME_BLT)
1633                 val |= TSI148_LCSR_DDAT_TM_BLT;
1634 
1635         if (cycle & VME_MBLT)
1636                 val |= TSI148_LCSR_DDAT_TM_MBLT;
1637 
1638         if (cycle & VME_2eVME)
1639                 val |= TSI148_LCSR_DDAT_TM_2eVME;
1640 
1641         if (cycle & VME_2eSST)
1642                 val |= TSI148_LCSR_DDAT_TM_2eSST;
1643 
1644         if (cycle & VME_2eSSTB) {
1645                 dev_err(dev, "Currently not setting Broadcast Select "
1646                         "Registers\n");
1647                 val |= TSI148_LCSR_DDAT_TM_2eSSTB;
1648         }
1649 
1650         /* Setup data width */
1651         switch (dwidth) {
1652         case VME_D16:
1653                 val |= TSI148_LCSR_DDAT_DBW_16;
1654                 break;
1655         case VME_D32:
1656                 val |= TSI148_LCSR_DDAT_DBW_32;
1657                 break;
1658         default:
1659                 dev_err(dev, "Invalid data width\n");
1660                 return -EINVAL;
1661         }
1662 
1663         /* Setup address space */
1664         switch (aspace) {
1665         case VME_A16:
1666                 val |= TSI148_LCSR_DDAT_AMODE_A16;
1667                 break;
1668         case VME_A24:
1669                 val |= TSI148_LCSR_DDAT_AMODE_A24;
1670                 break;
1671         case VME_A32:
1672                 val |= TSI148_LCSR_DDAT_AMODE_A32;
1673                 break;
1674         case VME_A64:
1675                 val |= TSI148_LCSR_DDAT_AMODE_A64;
1676                 break;
1677         case VME_CRCSR:
1678                 val |= TSI148_LCSR_DDAT_AMODE_CRCSR;
1679                 break;
1680         case VME_USER1:
1681                 val |= TSI148_LCSR_DDAT_AMODE_USER1;
1682                 break;
1683         case VME_USER2:
1684                 val |= TSI148_LCSR_DDAT_AMODE_USER2;
1685                 break;
1686         case VME_USER3:
1687                 val |= TSI148_LCSR_DDAT_AMODE_USER3;
1688                 break;
1689         case VME_USER4:
1690                 val |= TSI148_LCSR_DDAT_AMODE_USER4;
1691                 break;
1692         default:
1693                 dev_err(dev, "Invalid address space\n");
1694                 return -EINVAL;
1695                 break;
1696         }
1697 
1698         if (cycle & VME_SUPER)
1699                 val |= TSI148_LCSR_DDAT_SUP;
1700         if (cycle & VME_PROG)
1701                 val |= TSI148_LCSR_DDAT_PGM;
1702 
1703         *attr = cpu_to_be32(val);
1704 
1705         return 0;
1706 }
1707 
1708 /*
1709  * Add a link list descriptor to the list
1710  *
1711  * Note: DMA engine expects the DMA descriptor to be big endian.
1712  */
1713 static int tsi148_dma_list_add(struct vme_dma_list *list,
1714         struct vme_dma_attr *src, struct vme_dma_attr *dest, size_t count)
1715 {
1716         struct tsi148_dma_entry *entry, *prev;
1717         u32 address_high, address_low, val;
1718         struct vme_dma_pattern *pattern_attr;
1719         struct vme_dma_pci *pci_attr;
1720         struct vme_dma_vme *vme_attr;
1721         int retval = 0;
1722         struct vme_bridge *tsi148_bridge;
1723 
1724         tsi148_bridge = list->parent->parent;
1725 
1726         /* Descriptor must be aligned on 64-bit boundaries */
1727         entry = kmalloc(sizeof(struct tsi148_dma_entry), GFP_KERNEL);
1728         if (entry == NULL) {
1729                 dev_err(tsi148_bridge->parent, "Failed to allocate memory for "
1730                         "dma resource structure\n");
1731                 retval = -ENOMEM;
1732                 goto err_mem;
1733         }
1734 
1735         /* Test descriptor alignment */
1736         if ((unsigned long)&entry->descriptor & 0x7) {
1737                 dev_err(tsi148_bridge->parent, "Descriptor not aligned to 8 "
1738                         "byte boundary as required: %p\n",
1739                         &entry->descriptor);
1740                 retval = -EINVAL;
1741                 goto err_align;
1742         }
1743 
1744         /* Given we are going to fill out the structure, we probably don't
1745          * need to zero it, but better safe than sorry for now.
1746          */
1747         memset(&entry->descriptor, 0, sizeof(struct tsi148_dma_descriptor));
1748 
1749         /* Fill out source part */
1750         switch (src->type) {
1751         case VME_DMA_PATTERN:
1752                 pattern_attr = src->private;
1753 
1754                 entry->descriptor.dsal = cpu_to_be32(pattern_attr->pattern);
1755 
1756                 val = TSI148_LCSR_DSAT_TYP_PAT;
1757 
1758                 /* Default behaviour is 32 bit pattern */
1759                 if (pattern_attr->type & VME_DMA_PATTERN_BYTE)
1760                         val |= TSI148_LCSR_DSAT_PSZ;
1761 
1762                 /* It seems that the default behaviour is to increment */
1763                 if ((pattern_attr->type & VME_DMA_PATTERN_INCREMENT) == 0)
1764                         val |= TSI148_LCSR_DSAT_NIN;
1765                 entry->descriptor.dsat = cpu_to_be32(val);
1766                 break;
1767         case VME_DMA_PCI:
1768                 pci_attr = src->private;
1769 
1770                 reg_split((unsigned long long)pci_attr->address, &address_high,
1771                         &address_low);
1772                 entry->descriptor.dsau = cpu_to_be32(address_high);
1773                 entry->descriptor.dsal = cpu_to_be32(address_low);
1774                 entry->descriptor.dsat = cpu_to_be32(TSI148_LCSR_DSAT_TYP_PCI);
1775                 break;
1776         case VME_DMA_VME:
1777                 vme_attr = src->private;
1778 
1779                 reg_split((unsigned long long)vme_attr->address, &address_high,
1780                         &address_low);
1781                 entry->descriptor.dsau = cpu_to_be32(address_high);
1782                 entry->descriptor.dsal = cpu_to_be32(address_low);
1783                 entry->descriptor.dsat = cpu_to_be32(TSI148_LCSR_DSAT_TYP_VME);
1784 
1785                 retval = tsi148_dma_set_vme_src_attributes(
1786                         tsi148_bridge->parent, &entry->descriptor.dsat,
1787                         vme_attr->aspace, vme_attr->cycle, vme_attr->dwidth);
1788                 if (retval < 0)
1789                         goto err_source;
1790                 break;
1791         default:
1792                 dev_err(tsi148_bridge->parent, "Invalid source type\n");
1793                 retval = -EINVAL;
1794                 goto err_source;
1795                 break;
1796         }
1797 
1798         /* Assume last link - this will be over-written by adding another */
1799         entry->descriptor.dnlau = cpu_to_be32(0);
1800         entry->descriptor.dnlal = cpu_to_be32(TSI148_LCSR_DNLAL_LLA);
1801 
1802         /* Fill out destination part */
1803         switch (dest->type) {
1804         case VME_DMA_PCI:
1805                 pci_attr = dest->private;
1806 
1807                 reg_split((unsigned long long)pci_attr->address, &address_high,
1808                         &address_low);
1809                 entry->descriptor.ddau = cpu_to_be32(address_high);
1810                 entry->descriptor.ddal = cpu_to_be32(address_low);
1811                 entry->descriptor.ddat = cpu_to_be32(TSI148_LCSR_DDAT_TYP_PCI);
1812                 break;
1813         case VME_DMA_VME:
1814                 vme_attr = dest->private;
1815 
1816                 reg_split((unsigned long long)vme_attr->address, &address_high,
1817                         &address_low);
1818                 entry->descriptor.ddau = cpu_to_be32(address_high);
1819                 entry->descriptor.ddal = cpu_to_be32(address_low);
1820                 entry->descriptor.ddat = cpu_to_be32(TSI148_LCSR_DDAT_TYP_VME);
1821 
1822                 retval = tsi148_dma_set_vme_dest_attributes(
1823                         tsi148_bridge->parent, &entry->descriptor.ddat,
1824                         vme_attr->aspace, vme_attr->cycle, vme_attr->dwidth);
1825                 if (retval < 0)
1826                         goto err_dest;
1827                 break;
1828         default:
1829                 dev_err(tsi148_bridge->parent, "Invalid destination type\n");
1830                 retval = -EINVAL;
1831                 goto err_dest;
1832                 break;
1833         }
1834 
1835         /* Fill out count */
1836         entry->descriptor.dcnt = cpu_to_be32((u32)count);
1837 
1838         /* Add to list */
1839         list_add_tail(&entry->list, &list->entries);
1840 
1841         /* Fill out previous descriptors "Next Address" */
1842         if (entry->list.prev != &list->entries) {
1843                 prev = list_entry(entry->list.prev, struct tsi148_dma_entry,
1844                         list);
1845                 /* We need the bus address for the pointer */
1846                 entry->dma_handle = dma_map_single(tsi148_bridge->parent,
1847                         &entry->descriptor,
1848                         sizeof(struct tsi148_dma_descriptor), DMA_TO_DEVICE);
1849 
1850                 reg_split((unsigned long long)entry->dma_handle, &address_high,
1851                         &address_low);
1852                 entry->descriptor.dnlau = cpu_to_be32(address_high);
1853                 entry->descriptor.dnlal = cpu_to_be32(address_low);
1854 
1855         }
1856 
1857         return 0;
1858 
1859 err_dest:
1860 err_source:
1861 err_align:
1862                 kfree(entry);
1863 err_mem:
1864         return retval;
1865 }
1866 
1867 /*
1868  * Check to see if the provided DMA channel is busy.
1869  */
1870 static int tsi148_dma_busy(struct vme_bridge *tsi148_bridge, int channel)
1871 {
1872         u32 tmp;
1873         struct tsi148_driver *bridge;
1874 
1875         bridge = tsi148_bridge->driver_priv;
1876 
1877         tmp = ioread32be(bridge->base + TSI148_LCSR_DMA[channel] +
1878                 TSI148_LCSR_OFFSET_DSTA);
1879 
1880         if (tmp & TSI148_LCSR_DSTA_BSY)
1881                 return 0;
1882         else
1883                 return 1;
1884 
1885 }
1886 
1887 /*
1888  * Execute a previously generated link list
1889  *
1890  * XXX Need to provide control register configuration.
1891  */
1892 static int tsi148_dma_list_exec(struct vme_dma_list *list)
1893 {
1894         struct vme_dma_resource *ctrlr;
1895         int channel, retval = 0;
1896         struct tsi148_dma_entry *entry;
1897         u32 bus_addr_high, bus_addr_low;
1898         u32 val, dctlreg = 0;
1899         struct vme_bridge *tsi148_bridge;
1900         struct tsi148_driver *bridge;
1901 
1902         ctrlr = list->parent;
1903 
1904         tsi148_bridge = ctrlr->parent;
1905 
1906         bridge = tsi148_bridge->driver_priv;
1907 
1908         mutex_lock(&ctrlr->mtx);
1909 
1910         channel = ctrlr->number;
1911 
1912         if (!list_empty(&ctrlr->running)) {
1913                 /*
1914                  * XXX We have an active DMA transfer and currently haven't
1915                  *     sorted out the mechanism for "pending" DMA transfers.
1916                  *     Return busy.
1917                  */
1918                 /* Need to add to pending here */
1919                 mutex_unlock(&ctrlr->mtx);
1920                 return -EBUSY;
1921         } else {
1922                 list_add(&list->list, &ctrlr->running);
1923         }
1924 
1925         /* Get first bus address and write into registers */
1926         entry = list_first_entry(&list->entries, struct tsi148_dma_entry,
1927                 list);
1928 
1929         entry->dma_handle = dma_map_single(tsi148_bridge->parent,
1930                 &entry->descriptor,
1931                 sizeof(struct tsi148_dma_descriptor), DMA_TO_DEVICE);
1932 
1933         mutex_unlock(&ctrlr->mtx);
1934 
1935         reg_split(entry->dma_handle, &bus_addr_high, &bus_addr_low);
1936 
1937         iowrite32be(bus_addr_high, bridge->base +
1938                 TSI148_LCSR_DMA[channel] + TSI148_LCSR_OFFSET_DNLAU);
1939         iowrite32be(bus_addr_low, bridge->base +
1940                 TSI148_LCSR_DMA[channel] + TSI148_LCSR_OFFSET_DNLAL);
1941 
1942         dctlreg = ioread32be(bridge->base + TSI148_LCSR_DMA[channel] +
1943                 TSI148_LCSR_OFFSET_DCTL);
1944 
1945         /* Start the operation */
1946         iowrite32be(dctlreg | TSI148_LCSR_DCTL_DGO, bridge->base +
1947                 TSI148_LCSR_DMA[channel] + TSI148_LCSR_OFFSET_DCTL);
1948 
1949         wait_event_interruptible(bridge->dma_queue[channel],
1950                 tsi148_dma_busy(ctrlr->parent, channel));
1951 
1952         /*
1953          * Read status register, this register is valid until we kick off a
1954          * new transfer.
1955          */
1956         val = ioread32be(bridge->base + TSI148_LCSR_DMA[channel] +
1957                 TSI148_LCSR_OFFSET_DSTA);
1958 
1959         if (val & TSI148_LCSR_DSTA_VBE) {
1960                 dev_err(tsi148_bridge->parent, "DMA Error. DSTA=%08X\n", val);
1961                 retval = -EIO;
1962         }
1963 
1964         /* Remove list from running list */
1965         mutex_lock(&ctrlr->mtx);
1966         list_del(&list->list);
1967         mutex_unlock(&ctrlr->mtx);
1968 
1969         return retval;
1970 }
1971 
1972 /*
1973  * Clean up a previously generated link list
1974  *
1975  * We have a separate function, don't assume that the chain can't be reused.
1976  */
1977 static int tsi148_dma_list_empty(struct vme_dma_list *list)
1978 {
1979         struct list_head *pos, *temp;
1980         struct tsi148_dma_entry *entry;
1981 
1982         struct vme_bridge *tsi148_bridge = list->parent->parent;
1983 
1984         /* detach and free each entry */
1985         list_for_each_safe(pos, temp, &list->entries) {
1986                 list_del(pos);
1987                 entry = list_entry(pos, struct tsi148_dma_entry, list);
1988 
1989                 dma_unmap_single(tsi148_bridge->parent, entry->dma_handle,
1990                         sizeof(struct tsi148_dma_descriptor), DMA_TO_DEVICE);
1991                 kfree(entry);
1992         }
1993 
1994         return 0;
1995 }
1996 
1997 /*
1998  * All 4 location monitors reside at the same base - this is therefore a
1999  * system wide configuration.
2000  *
2001  * This does not enable the LM monitor - that should be done when the first
2002  * callback is attached and disabled when the last callback is removed.
2003  */
2004 static int tsi148_lm_set(struct vme_lm_resource *lm, unsigned long long lm_base,
2005         u32 aspace, u32 cycle)
2006 {
2007         u32 lm_base_high, lm_base_low, lm_ctl = 0;
2008         int i;
2009         struct vme_bridge *tsi148_bridge;
2010         struct tsi148_driver *bridge;
2011 
2012         tsi148_bridge = lm->parent;
2013 
2014         bridge = tsi148_bridge->driver_priv;
2015 
2016         mutex_lock(&lm->mtx);
2017 
2018         /* If we already have a callback attached, we can't move it! */
2019         for (i = 0; i < lm->monitors; i++) {
2020                 if (bridge->lm_callback[i] != NULL) {
2021                         mutex_unlock(&lm->mtx);
2022                         dev_err(tsi148_bridge->parent, "Location monitor "
2023                                 "callback attached, can't reset\n");
2024                         return -EBUSY;
2025                 }
2026         }
2027 
2028         switch (aspace) {
2029         case VME_A16:
2030                 lm_ctl |= TSI148_LCSR_LMAT_AS_A16;
2031                 break;
2032         case VME_A24:
2033                 lm_ctl |= TSI148_LCSR_LMAT_AS_A24;
2034                 break;
2035         case VME_A32:
2036                 lm_ctl |= TSI148_LCSR_LMAT_AS_A32;
2037                 break;
2038         case VME_A64:
2039                 lm_ctl |= TSI148_LCSR_LMAT_AS_A64;
2040                 break;
2041         default:
2042                 mutex_unlock(&lm->mtx);
2043                 dev_err(tsi148_bridge->parent, "Invalid address space\n");
2044                 return -EINVAL;
2045                 break;
2046         }
2047 
2048         if (cycle & VME_SUPER)
2049                 lm_ctl |= TSI148_LCSR_LMAT_SUPR ;
2050         if (cycle & VME_USER)
2051                 lm_ctl |= TSI148_LCSR_LMAT_NPRIV;
2052         if (cycle & VME_PROG)
2053                 lm_ctl |= TSI148_LCSR_LMAT_PGM;
2054         if (cycle & VME_DATA)
2055                 lm_ctl |= TSI148_LCSR_LMAT_DATA;
2056 
2057         reg_split(lm_base, &lm_base_high, &lm_base_low);
2058 
2059         iowrite32be(lm_base_high, bridge->base + TSI148_LCSR_LMBAU);
2060         iowrite32be(lm_base_low, bridge->base + TSI148_LCSR_LMBAL);
2061         iowrite32be(lm_ctl, bridge->base + TSI148_LCSR_LMAT);
2062 
2063         mutex_unlock(&lm->mtx);
2064 
2065         return 0;
2066 }
2067 
2068 /* Get configuration of the callback monitor and return whether it is enabled
2069  * or disabled.
2070  */
2071 static int tsi148_lm_get(struct vme_lm_resource *lm,
2072         unsigned long long *lm_base, u32 *aspace, u32 *cycle)
2073 {
2074         u32 lm_base_high, lm_base_low, lm_ctl, enabled = 0;
2075         struct tsi148_driver *bridge;
2076 
2077         bridge = lm->parent->driver_priv;
2078 
2079         mutex_lock(&lm->mtx);
2080 
2081         lm_base_high = ioread32be(bridge->base + TSI148_LCSR_LMBAU);
2082         lm_base_low = ioread32be(bridge->base + TSI148_LCSR_LMBAL);
2083         lm_ctl = ioread32be(bridge->base + TSI148_LCSR_LMAT);
2084 
2085         reg_join(lm_base_high, lm_base_low, lm_base);
2086 
2087         if (lm_ctl & TSI148_LCSR_LMAT_EN)
2088                 enabled = 1;
2089 
2090         if ((lm_ctl & TSI148_LCSR_LMAT_AS_M) == TSI148_LCSR_LMAT_AS_A16)
2091                 *aspace |= VME_A16;
2092 
2093         if ((lm_ctl & TSI148_LCSR_LMAT_AS_M) == TSI148_LCSR_LMAT_AS_A24)
2094                 *aspace |= VME_A24;
2095 
2096         if ((lm_ctl & TSI148_LCSR_LMAT_AS_M) == TSI148_LCSR_LMAT_AS_A32)
2097                 *aspace |= VME_A32;
2098 
2099         if ((lm_ctl & TSI148_LCSR_LMAT_AS_M) == TSI148_LCSR_LMAT_AS_A64)
2100                 *aspace |= VME_A64;
2101 
2102 
2103         if (lm_ctl & TSI148_LCSR_LMAT_SUPR)
2104                 *cycle |= VME_SUPER;
2105         if (lm_ctl & TSI148_LCSR_LMAT_NPRIV)
2106                 *cycle |= VME_USER;
2107         if (lm_ctl & TSI148_LCSR_LMAT_PGM)
2108                 *cycle |= VME_PROG;
2109         if (lm_ctl & TSI148_LCSR_LMAT_DATA)
2110                 *cycle |= VME_DATA;
2111 
2112         mutex_unlock(&lm->mtx);
2113 
2114         return enabled;
2115 }
2116 
2117 /*
2118  * Attach a callback to a specific location monitor.
2119  *
2120  * Callback will be passed the monitor triggered.
2121  */
2122 static int tsi148_lm_attach(struct vme_lm_resource *lm, int monitor,
2123         void (*callback)(int))
2124 {
2125         u32 lm_ctl, tmp;
2126         struct vme_bridge *tsi148_bridge;
2127         struct tsi148_driver *bridge;
2128 
2129         tsi148_bridge = lm->parent;
2130 
2131         bridge = tsi148_bridge->driver_priv;
2132 
2133         mutex_lock(&lm->mtx);
2134 
2135         /* Ensure that the location monitor is configured - need PGM or DATA */
2136         lm_ctl = ioread32be(bridge->base + TSI148_LCSR_LMAT);
2137         if ((lm_ctl & (TSI148_LCSR_LMAT_PGM | TSI148_LCSR_LMAT_DATA)) == 0) {
2138                 mutex_unlock(&lm->mtx);
2139                 dev_err(tsi148_bridge->parent, "Location monitor not properly "
2140                         "configured\n");
2141                 return -EINVAL;
2142         }
2143 
2144         /* Check that a callback isn't already attached */
2145         if (bridge->lm_callback[monitor] != NULL) {
2146                 mutex_unlock(&lm->mtx);
2147                 dev_err(tsi148_bridge->parent, "Existing callback attached\n");
2148                 return -EBUSY;
2149         }
2150 
2151         /* Attach callback */
2152         bridge->lm_callback[monitor] = callback;
2153 
2154         /* Enable Location Monitor interrupt */
2155         tmp = ioread32be(bridge->base + TSI148_LCSR_INTEN);
2156         tmp |= TSI148_LCSR_INTEN_LMEN[monitor];
2157         iowrite32be(tmp, bridge->base + TSI148_LCSR_INTEN);
2158 
2159         tmp = ioread32be(bridge->base + TSI148_LCSR_INTEO);
2160         tmp |= TSI148_LCSR_INTEO_LMEO[monitor];
2161         iowrite32be(tmp, bridge->base + TSI148_LCSR_INTEO);
2162 
2163         /* Ensure that global Location Monitor Enable set */
2164         if ((lm_ctl & TSI148_LCSR_LMAT_EN) == 0) {
2165                 lm_ctl |= TSI148_LCSR_LMAT_EN;
2166                 iowrite32be(lm_ctl, bridge->base + TSI148_LCSR_LMAT);
2167         }
2168 
2169         mutex_unlock(&lm->mtx);
2170 
2171         return 0;
2172 }
2173 
2174 /*
2175  * Detach a callback function forn a specific location monitor.
2176  */
2177 static int tsi148_lm_detach(struct vme_lm_resource *lm, int monitor)
2178 {
2179         u32 lm_en, tmp;
2180         struct tsi148_driver *bridge;
2181 
2182         bridge = lm->parent->driver_priv;
2183 
2184         mutex_lock(&lm->mtx);
2185 
2186         /* Disable Location Monitor and ensure previous interrupts are clear */
2187         lm_en = ioread32be(bridge->base + TSI148_LCSR_INTEN);
2188         lm_en &= ~TSI148_LCSR_INTEN_LMEN[monitor];
2189         iowrite32be(lm_en, bridge->base + TSI148_LCSR_INTEN);
2190 
2191         tmp = ioread32be(bridge->base + TSI148_LCSR_INTEO);
2192         tmp &= ~TSI148_LCSR_INTEO_LMEO[monitor];
2193         iowrite32be(tmp, bridge->base + TSI148_LCSR_INTEO);
2194 
2195         iowrite32be(TSI148_LCSR_INTC_LMC[monitor],
2196                  bridge->base + TSI148_LCSR_INTC);
2197 
2198         /* Detach callback */
2199         bridge->lm_callback[monitor] = NULL;
2200 
2201         /* If all location monitors disabled, disable global Location Monitor */
2202         if ((lm_en & (TSI148_LCSR_INTS_LM0S | TSI148_LCSR_INTS_LM1S |
2203                         TSI148_LCSR_INTS_LM2S | TSI148_LCSR_INTS_LM3S)) == 0) {
2204                 tmp = ioread32be(bridge->base + TSI148_LCSR_LMAT);
2205                 tmp &= ~TSI148_LCSR_LMAT_EN;
2206                 iowrite32be(tmp, bridge->base + TSI148_LCSR_LMAT);
2207         }
2208 
2209         mutex_unlock(&lm->mtx);
2210 
2211         return 0;
2212 }
2213 
2214 /*
2215  * Determine Geographical Addressing
2216  */
2217 static int tsi148_slot_get(struct vme_bridge *tsi148_bridge)
2218 {
2219         u32 slot = 0;
2220         struct tsi148_driver *bridge;
2221 
2222         bridge = tsi148_bridge->driver_priv;
2223 
2224         if (!geoid) {
2225                 slot = ioread32be(bridge->base + TSI148_LCSR_VSTAT);
2226                 slot = slot & TSI148_LCSR_VSTAT_GA_M;
2227         } else
2228                 slot = geoid;
2229 
2230         return (int)slot;
2231 }
2232 
2233 static void *tsi148_alloc_consistent(struct device *parent, size_t size,
2234         dma_addr_t *dma)
2235 {
2236         struct pci_dev *pdev;
2237 
2238         /* Find pci_dev container of dev */
2239         pdev = to_pci_dev(parent);
2240 
2241         return pci_alloc_consistent(pdev, size, dma);
2242 }
2243 
2244 static void tsi148_free_consistent(struct device *parent, size_t size,
2245         void *vaddr, dma_addr_t dma)
2246 {
2247         struct pci_dev *pdev;
2248 
2249         /* Find pci_dev container of dev */
2250         pdev = to_pci_dev(parent);
2251 
2252         pci_free_consistent(pdev, size, vaddr, dma);
2253 }
2254 
2255 /*
2256  * Configure CR/CSR space
2257  *
2258  * Access to the CR/CSR can be configured at power-up. The location of the
2259  * CR/CSR registers in the CR/CSR address space is determined by the boards
2260  * Auto-ID or Geographic address. This function ensures that the window is
2261  * enabled at an offset consistent with the boards geopgraphic address.
2262  *
2263  * Each board has a 512kB window, with the highest 4kB being used for the
2264  * boards registers, this means there is a fix length 508kB window which must
2265  * be mapped onto PCI memory.
2266  */
2267 static int tsi148_crcsr_init(struct vme_bridge *tsi148_bridge,
2268         struct pci_dev *pdev)
2269 {
2270         u32 cbar, crat, vstat;
2271         u32 crcsr_bus_high, crcsr_bus_low;
2272         int retval;
2273         struct tsi148_driver *bridge;
2274 
2275         bridge = tsi148_bridge->driver_priv;
2276 
2277         /* Allocate mem for CR/CSR image */
2278         bridge->crcsr_kernel = pci_alloc_consistent(pdev, VME_CRCSR_BUF_SIZE,
2279                 &bridge->crcsr_bus);
2280         if (bridge->crcsr_kernel == NULL) {
2281                 dev_err(tsi148_bridge->parent, "Failed to allocate memory for "
2282                         "CR/CSR image\n");
2283                 return -ENOMEM;
2284         }
2285 
2286         memset(bridge->crcsr_kernel, 0, VME_CRCSR_BUF_SIZE);
2287 
2288         reg_split(bridge->crcsr_bus, &crcsr_bus_high, &crcsr_bus_low);
2289 
2290         iowrite32be(crcsr_bus_high, bridge->base + TSI148_LCSR_CROU);
2291         iowrite32be(crcsr_bus_low, bridge->base + TSI148_LCSR_CROL);
2292 
2293         /* Ensure that the CR/CSR is configured at the correct offset */
2294         cbar = ioread32be(bridge->base + TSI148_CBAR);
2295         cbar = (cbar & TSI148_CRCSR_CBAR_M)>>3;
2296 
2297         vstat = tsi148_slot_get(tsi148_bridge);
2298 
2299         if (cbar != vstat) {
2300                 cbar = vstat;
2301                 dev_info(tsi148_bridge->parent, "Setting CR/CSR offset\n");
2302                 iowrite32be(cbar<<3, bridge->base + TSI148_CBAR);
2303         }
2304         dev_info(tsi148_bridge->parent, "CR/CSR Offset: %d\n", cbar);
2305 
2306         crat = ioread32be(bridge->base + TSI148_LCSR_CRAT);
2307         if (crat & TSI148_LCSR_CRAT_EN)
2308                 dev_info(tsi148_bridge->parent, "CR/CSR already enabled\n");
2309         else {
2310                 dev_info(tsi148_bridge->parent, "Enabling CR/CSR space\n");
2311                 iowrite32be(crat | TSI148_LCSR_CRAT_EN,
2312                         bridge->base + TSI148_LCSR_CRAT);
2313         }
2314 
2315         /* If we want flushed, error-checked writes, set up a window
2316          * over the CR/CSR registers. We read from here to safely flush
2317          * through VME writes.
2318          */
2319         if (err_chk) {
2320                 retval = tsi148_master_set(bridge->flush_image, 1,
2321                         (vstat * 0x80000), 0x80000, VME_CRCSR, VME_SCT,
2322                         VME_D16);
2323                 if (retval)
2324                         dev_err(tsi148_bridge->parent, "Configuring flush image"
2325                                 " failed\n");
2326         }
2327 
2328         return 0;
2329 
2330 }
2331 
2332 static void tsi148_crcsr_exit(struct vme_bridge *tsi148_bridge,
2333         struct pci_dev *pdev)
2334 {
2335         u32 crat;
2336         struct tsi148_driver *bridge;
2337 
2338         bridge = tsi148_bridge->driver_priv;
2339 
2340         /* Turn off CR/CSR space */
2341         crat = ioread32be(bridge->base + TSI148_LCSR_CRAT);
2342         iowrite32be(crat & ~TSI148_LCSR_CRAT_EN,
2343                 bridge->base + TSI148_LCSR_CRAT);
2344 
2345         /* Free image */
2346         iowrite32be(0, bridge->base + TSI148_LCSR_CROU);
2347         iowrite32be(0, bridge->base + TSI148_LCSR_CROL);
2348 
2349         pci_free_consistent(pdev, VME_CRCSR_BUF_SIZE, bridge->crcsr_kernel,
2350                 bridge->crcsr_bus);
2351 }
2352 
2353 static int tsi148_probe(struct pci_dev *pdev, const struct pci_device_id *id)
2354 {
2355         int retval, i, master_num;
2356         u32 data;
2357         struct list_head *pos = NULL, *n;
2358         struct vme_bridge *tsi148_bridge;
2359         struct tsi148_driver *tsi148_device;
2360         struct vme_master_resource *master_image;
2361         struct vme_slave_resource *slave_image;
2362         struct vme_dma_resource *dma_ctrlr;
2363         struct vme_lm_resource *lm;
2364 
2365         /* If we want to support more than one of each bridge, we need to
2366          * dynamically generate this so we get one per device
2367          */
2368         tsi148_bridge = kzalloc(sizeof(struct vme_bridge), GFP_KERNEL);
2369         if (tsi148_bridge == NULL) {
2370                 dev_err(&pdev->dev, "Failed to allocate memory for device "
2371                         "structure\n");
2372                 retval = -ENOMEM;
2373                 goto err_struct;
2374         }
2375 
2376         tsi148_device = kzalloc(sizeof(struct tsi148_driver), GFP_KERNEL);
2377         if (tsi148_device == NULL) {
2378                 dev_err(&pdev->dev, "Failed to allocate memory for device "
2379                         "structure\n");
2380                 retval = -ENOMEM;
2381                 goto err_driver;
2382         }
2383 
2384         tsi148_bridge->driver_priv = tsi148_device;
2385 
2386         /* Enable the device */
2387         retval = pci_enable_device(pdev);
2388         if (retval) {
2389                 dev_err(&pdev->dev, "Unable to enable device\n");
2390                 goto err_enable;
2391         }
2392 
2393         /* Map Registers */
2394         retval = pci_request_regions(pdev, driver_name);
2395         if (retval) {
2396                 dev_err(&pdev->dev, "Unable to reserve resources\n");
2397                 goto err_resource;
2398         }
2399 
2400         /* map registers in BAR 0 */
2401         tsi148_device->base = ioremap_nocache(pci_resource_start(pdev, 0),
2402                 4096);
2403         if (!tsi148_device->base) {
2404                 dev_err(&pdev->dev, "Unable to remap CRG region\n");
2405                 retval = -EIO;
2406                 goto err_remap;
2407         }
2408 
2409         /* Check to see if the mapping worked out */
2410         data = ioread32(tsi148_device->base + TSI148_PCFS_ID) & 0x0000FFFF;
2411         if (data != PCI_VENDOR_ID_TUNDRA) {
2412                 dev_err(&pdev->dev, "CRG region check failed\n");
2413                 retval = -EIO;
2414                 goto err_test;
2415         }
2416 
2417         /* Initialize wait queues & mutual exclusion flags */
2418         init_waitqueue_head(&tsi148_device->dma_queue[0]);
2419         init_waitqueue_head(&tsi148_device->dma_queue[1]);
2420         init_waitqueue_head(&tsi148_device->iack_queue);
2421         mutex_init(&tsi148_device->vme_int);
2422         mutex_init(&tsi148_device->vme_rmw);
2423 
2424         tsi148_bridge->parent = &pdev->dev;
2425         strcpy(tsi148_bridge->name, driver_name);
2426 
2427         /* Setup IRQ */
2428         retval = tsi148_irq_init(tsi148_bridge);
2429         if (retval != 0) {
2430                 dev_err(&pdev->dev, "Chip Initialization failed.\n");
2431                 goto err_irq;
2432         }
2433 
2434         /* If we are going to flush writes, we need to read from the VME bus.
2435          * We need to do this safely, thus we read the devices own CR/CSR
2436          * register. To do this we must set up a window in CR/CSR space and
2437          * hence have one less master window resource available.
2438          */
2439         master_num = TSI148_MAX_MASTER;
2440         if (err_chk) {
2441                 master_num--;
2442 
2443                 tsi148_device->flush_image =
2444                         kmalloc(sizeof(struct vme_master_resource), GFP_KERNEL);
2445                 if (tsi148_device->flush_image == NULL) {
2446                         dev_err(&pdev->dev, "Failed to allocate memory for "
2447                         "flush resource structure\n");
2448                         retval = -ENOMEM;
2449                         goto err_master;
2450                 }
2451                 tsi148_device->flush_image->parent = tsi148_bridge;
2452                 spin_lock_init(&tsi148_device->flush_image->lock);
2453                 tsi148_device->flush_image->locked = 1;
2454                 tsi148_device->flush_image->number = master_num;
2455                 memset(&tsi148_device->flush_image->bus_resource, 0,
2456                         sizeof(struct resource));
2457                 tsi148_device->flush_image->kern_base  = NULL;
2458         }
2459 
2460         /* Add master windows to list */
2461         INIT_LIST_HEAD(&tsi148_bridge->master_resources);
2462         for (i = 0; i < master_num; i++) {
2463                 master_image = kmalloc(sizeof(struct vme_master_resource),
2464                         GFP_KERNEL);
2465                 if (master_image == NULL) {
2466                         dev_err(&pdev->dev, "Failed to allocate memory for "
2467                         "master resource structure\n");
2468                         retval = -ENOMEM;
2469                         goto err_master;
2470                 }
2471                 master_image->parent = tsi148_bridge;
2472                 spin_lock_init(&master_image->lock);
2473                 master_image->locked = 0;
2474                 master_image->number = i;
2475                 master_image->address_attr = VME_A16 | VME_A24 | VME_A32 |
2476                         VME_A64;
2477                 master_image->cycle_attr = VME_SCT | VME_BLT | VME_MBLT |
2478                         VME_2eVME | VME_2eSST | VME_2eSSTB | VME_2eSST160 |
2479                         VME_2eSST267 | VME_2eSST320 | VME_SUPER | VME_USER |
2480                         VME_PROG | VME_DATA;
2481                 master_image->width_attr = VME_D16 | VME_D32;
2482                 memset(&master_image->bus_resource, 0,
2483                         sizeof(struct resource));
2484                 master_image->kern_base  = NULL;
2485                 list_add_tail(&master_image->list,
2486                         &tsi148_bridge->master_resources);
2487         }
2488 
2489         /* Add slave windows to list */
2490         INIT_LIST_HEAD(&tsi148_bridge->slave_resources);
2491         for (i = 0; i < TSI148_MAX_SLAVE; i++) {
2492                 slave_image = kmalloc(sizeof(struct vme_slave_resource),
2493                         GFP_KERNEL);
2494                 if (slave_image == NULL) {
2495                         dev_err(&pdev->dev, "Failed to allocate memory for "
2496                         "slave resource structure\n");
2497                         retval = -ENOMEM;
2498                         goto err_slave;
2499                 }
2500                 slave_image->parent = tsi148_bridge;
2501                 mutex_init(&slave_image->mtx);
2502                 slave_image->locked = 0;
2503                 slave_image->number = i;
2504                 slave_image->address_attr = VME_A16 | VME_A24 | VME_A32 |
2505                         VME_A64 | VME_CRCSR | VME_USER1 | VME_USER2 |
2506                         VME_USER3 | VME_USER4;
2507                 slave_image->cycle_attr = VME_SCT | VME_BLT | VME_MBLT |
2508                         VME_2eVME | VME_2eSST | VME_2eSSTB | VME_2eSST160 |
2509                         VME_2eSST267 | VME_2eSST320 | VME_SUPER | VME_USER |
2510                         VME_PROG | VME_DATA;
2511                 list_add_tail(&slave_image->list,
2512                         &tsi148_bridge->slave_resources);
2513         }
2514 
2515         /* Add dma engines to list */
2516         INIT_LIST_HEAD(&tsi148_bridge->dma_resources);
2517         for (i = 0; i < TSI148_MAX_DMA; i++) {
2518                 dma_ctrlr = kmalloc(sizeof(struct vme_dma_resource),
2519                         GFP_KERNEL);
2520                 if (dma_ctrlr == NULL) {
2521                         dev_err(&pdev->dev, "Failed to allocate memory for "
2522                         "dma resource structure\n");
2523                         retval = -ENOMEM;
2524                         goto err_dma;
2525                 }
2526                 dma_ctrlr->parent = tsi148_bridge;
2527                 mutex_init(&dma_ctrlr->mtx);
2528                 dma_ctrlr->locked = 0;
2529                 dma_ctrlr->number = i;
2530                 dma_ctrlr->route_attr = VME_DMA_VME_TO_MEM |
2531                         VME_DMA_MEM_TO_VME | VME_DMA_VME_TO_VME |
2532                         VME_DMA_MEM_TO_MEM | VME_DMA_PATTERN_TO_VME |
2533                         VME_DMA_PATTERN_TO_MEM;
2534                 INIT_LIST_HEAD(&dma_ctrlr->pending);
2535                 INIT_LIST_HEAD(&dma_ctrlr->running);
2536                 list_add_tail(&dma_ctrlr->list,
2537                         &tsi148_bridge->dma_resources);
2538         }
2539 
2540         /* Add location monitor to list */
2541         INIT_LIST_HEAD(&tsi148_bridge->lm_resources);
2542         lm = kmalloc(sizeof(struct vme_lm_resource), GFP_KERNEL);
2543         if (lm == NULL) {
2544                 dev_err(&pdev->dev, "Failed to allocate memory for "
2545                 "location monitor resource structure\n");
2546                 retval = -ENOMEM;
2547                 goto err_lm;
2548         }
2549         lm->parent = tsi148_bridge;
2550         mutex_init(&lm->mtx);
2551         lm->locked = 0;
2552         lm->number = 1;
2553         lm->monitors = 4;
2554         list_add_tail(&lm->list, &tsi148_bridge->lm_resources);
2555 
2556         tsi148_bridge->slave_get = tsi148_slave_get;
2557         tsi148_bridge->slave_set = tsi148_slave_set;
2558         tsi148_bridge->master_get = tsi148_master_get;
2559         tsi148_bridge->master_set = tsi148_master_set;
2560         tsi148_bridge->master_read = tsi148_master_read;
2561         tsi148_bridge->master_write = tsi148_master_write;
2562         tsi148_bridge->master_rmw = tsi148_master_rmw;
2563         tsi148_bridge->dma_list_add = tsi148_dma_list_add;
2564         tsi148_bridge->dma_list_exec = tsi148_dma_list_exec;
2565         tsi148_bridge->dma_list_empty = tsi148_dma_list_empty;
2566         tsi148_bridge->irq_set = tsi148_irq_set;
2567         tsi148_bridge->irq_generate = tsi148_irq_generate;
2568         tsi148_bridge->lm_set = tsi148_lm_set;
2569         tsi148_bridge->lm_get = tsi148_lm_get;
2570         tsi148_bridge->lm_attach = tsi148_lm_attach;
2571         tsi148_bridge->lm_detach = tsi148_lm_detach;
2572         tsi148_bridge->slot_get = tsi148_slot_get;
2573         tsi148_bridge->alloc_consistent = tsi148_alloc_consistent;
2574         tsi148_bridge->free_consistent = tsi148_free_consistent;
2575 
2576         data = ioread32be(tsi148_device->base + TSI148_LCSR_VSTAT);
2577         dev_info(&pdev->dev, "Board is%s the VME system controller\n",
2578                 (data & TSI148_LCSR_VSTAT_SCONS) ? "" : " not");
2579         if (!geoid)
2580                 dev_info(&pdev->dev, "VME geographical address is %d\n",
2581                         data & TSI148_LCSR_VSTAT_GA_M);
2582         else
2583                 dev_info(&pdev->dev, "VME geographical address is set to %d\n",
2584                         geoid);
2585 
2586         dev_info(&pdev->dev, "VME Write and flush and error check is %s\n",
2587                 err_chk ? "enabled" : "disabled");
2588 
2589         retval = tsi148_crcsr_init(tsi148_bridge, pdev);
2590         if (retval) {
2591                 dev_err(&pdev->dev, "CR/CSR configuration failed.\n");
2592                 goto err_crcsr;
2593         }
2594 
2595         retval = vme_register_bridge(tsi148_bridge);
2596         if (retval != 0) {
2597                 dev_err(&pdev->dev, "Chip Registration failed.\n");
2598                 goto err_reg;
2599         }
2600 
2601         pci_set_drvdata(pdev, tsi148_bridge);
2602 
2603         /* Clear VME bus "board fail", and "power-up reset" lines */
2604         data = ioread32be(tsi148_device->base + TSI148_LCSR_VSTAT);
2605         data &= ~TSI148_LCSR_VSTAT_BRDFL;
2606         data |= TSI148_LCSR_VSTAT_CPURST;
2607         iowrite32be(data, tsi148_device->base + TSI148_LCSR_VSTAT);
2608 
2609         return 0;
2610 
2611 err_reg:
2612         tsi148_crcsr_exit(tsi148_bridge, pdev);
2613 err_crcsr:
2614 err_lm:
2615         /* resources are stored in link list */
2616         list_for_each_safe(pos, n, &tsi148_bridge->lm_resources) {
2617                 lm = list_entry(pos, struct vme_lm_resource, list);
2618                 list_del(pos);
2619                 kfree(lm);
2620         }
2621 err_dma:
2622         /* resources are stored in link list */
2623         list_for_each_safe(pos, n, &tsi148_bridge->dma_resources) {
2624                 dma_ctrlr = list_entry(pos, struct vme_dma_resource, list);
2625                 list_del(pos);
2626                 kfree(dma_ctrlr);
2627         }
2628 err_slave:
2629         /* resources are stored in link list */
2630         list_for_each_safe(pos, n, &tsi148_bridge->slave_resources) {
2631                 slave_image = list_entry(pos, struct vme_slave_resource, list);
2632                 list_del(pos);
2633                 kfree(slave_image);
2634         }
2635 err_master:
2636         /* resources are stored in link list */
2637         list_for_each_safe(pos, n, &tsi148_bridge->master_resources) {
2638                 master_image = list_entry(pos, struct vme_master_resource,
2639                         list);
2640                 list_del(pos);
2641                 kfree(master_image);
2642         }
2643 
2644         tsi148_irq_exit(tsi148_bridge, pdev);
2645 err_irq:
2646 err_test:
2647         iounmap(tsi148_device->base);
2648 err_remap:
2649         pci_release_regions(pdev);
2650 err_resource:
2651         pci_disable_device(pdev);
2652 err_enable:
2653         kfree(tsi148_device);
2654 err_driver:
2655         kfree(tsi148_bridge);
2656 err_struct:
2657         return retval;
2658 
2659 }
2660 
2661 static void tsi148_remove(struct pci_dev *pdev)
2662 {
2663         struct list_head *pos = NULL;
2664         struct list_head *tmplist;
2665         struct vme_master_resource *master_image;
2666         struct vme_slave_resource *slave_image;
2667         struct vme_dma_resource *dma_ctrlr;
2668         int i;
2669         struct tsi148_driver *bridge;
2670         struct vme_bridge *tsi148_bridge = pci_get_drvdata(pdev);
2671 
2672         bridge = tsi148_bridge->driver_priv;
2673 
2674 
2675         dev_dbg(&pdev->dev, "Driver is being unloaded.\n");
2676 
2677         /*
2678          *  Shutdown all inbound and outbound windows.
2679          */
2680         for (i = 0; i < 8; i++) {
2681                 iowrite32be(0, bridge->base + TSI148_LCSR_IT[i] +
2682                         TSI148_LCSR_OFFSET_ITAT);
2683                 iowrite32be(0, bridge->base + TSI148_LCSR_OT[i] +
2684                         TSI148_LCSR_OFFSET_OTAT);
2685         }
2686 
2687         /*
2688          *  Shutdown Location monitor.
2689          */
2690         iowrite32be(0, bridge->base + TSI148_LCSR_LMAT);
2691 
2692         /*
2693          *  Shutdown CRG map.
2694          */
2695         iowrite32be(0, bridge->base + TSI148_LCSR_CSRAT);
2696 
2697         /*
2698          *  Clear error status.
2699          */
2700         iowrite32be(0xFFFFFFFF, bridge->base + TSI148_LCSR_EDPAT);
2701         iowrite32be(0xFFFFFFFF, bridge->base + TSI148_LCSR_VEAT);
2702         iowrite32be(0x07000700, bridge->base + TSI148_LCSR_PSTAT);
2703 
2704         /*
2705          *  Remove VIRQ interrupt (if any)
2706          */
2707         if (ioread32be(bridge->base + TSI148_LCSR_VICR) & 0x800)
2708                 iowrite32be(0x8000, bridge->base + TSI148_LCSR_VICR);
2709 
2710         /*
2711          *  Map all Interrupts to PCI INTA
2712          */
2713         iowrite32be(0x0, bridge->base + TSI148_LCSR_INTM1);
2714         iowrite32be(0x0, bridge->base + TSI148_LCSR_INTM2);
2715 
2716         tsi148_irq_exit(tsi148_bridge, pdev);
2717 
2718         vme_unregister_bridge(tsi148_bridge);
2719 
2720         tsi148_crcsr_exit(tsi148_bridge, pdev);
2721 
2722         /* resources are stored in link list */
2723         list_for_each_safe(pos, tmplist, &tsi148_bridge->dma_resources) {
2724                 dma_ctrlr = list_entry(pos, struct vme_dma_resource, list);
2725                 list_del(pos);
2726                 kfree(dma_ctrlr);
2727         }
2728 
2729         /* resources are stored in link list */
2730         list_for_each_safe(pos, tmplist, &tsi148_bridge->slave_resources) {
2731                 slave_image = list_entry(pos, struct vme_slave_resource, list);
2732                 list_del(pos);
2733                 kfree(slave_image);
2734         }
2735 
2736         /* resources are stored in link list */
2737         list_for_each_safe(pos, tmplist, &tsi148_bridge->master_resources) {
2738                 master_image = list_entry(pos, struct vme_master_resource,
2739                         list);
2740                 list_del(pos);
2741                 kfree(master_image);
2742         }
2743 
2744         iounmap(bridge->base);
2745 
2746         pci_release_regions(pdev);
2747 
2748         pci_disable_device(pdev);
2749 
2750         kfree(tsi148_bridge->driver_priv);
2751 
2752         kfree(tsi148_bridge);
2753 }
2754 
2755 module_pci_driver(tsi148_driver);
2756 
2757 MODULE_PARM_DESC(err_chk, "Check for VME errors on reads and writes");
2758 module_param(err_chk, bool, 0);
2759 
2760 MODULE_PARM_DESC(geoid, "Override geographical addressing");
2761 module_param(geoid, int, 0);
2762 
2763 MODULE_DESCRIPTION("VME driver for the Tundra Tempe VME bridge");
2764 MODULE_LICENSE("GPL");
2765 

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