[ARM] rpc: ecard: remove deprecated ecard_address() and relatives
[linux-2.6.git] / arch / arm / kernel / ecard.c
1 /*
2  *  linux/arch/arm/kernel/ecard.c
3  *
4  *  Copyright 1995-2001 Russell King
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License version 2 as
8  * published by the Free Software Foundation.
9  *
10  *  Find all installed expansion cards, and handle interrupts from them.
11  *
12  *  Created from information from Acorns RiscOS3 PRMs
13  *
14  *  08-Dec-1996 RMK     Added code for the 9'th expansion card - the ether
15  *                      podule slot.
16  *  06-May-1997 RMK     Added blacklist for cards whose loader doesn't work.
17  *  12-Sep-1997 RMK     Created new handling of interrupt enables/disables
18  *                      - cards can now register their own routine to control
19  *                      interrupts (recommended).
20  *  29-Sep-1997 RMK     Expansion card interrupt hardware not being re-enabled
21  *                      on reset from Linux. (Caused cards not to respond
22  *                      under RiscOS without hard reset).
23  *  15-Feb-1998 RMK     Added DMA support
24  *  12-Sep-1998 RMK     Added EASI support
25  *  10-Jan-1999 RMK     Run loaders in a simulated RISC OS environment.
26  *  17-Apr-1999 RMK     Support for EASI Type C cycles.
27  */
28 #define ECARD_C
29
30 #include <linux/module.h>
31 #include <linux/kernel.h>
32 #include <linux/types.h>
33 #include <linux/sched.h>
34 #include <linux/interrupt.h>
35 #include <linux/completion.h>
36 #include <linux/reboot.h>
37 #include <linux/mm.h>
38 #include <linux/slab.h>
39 #include <linux/proc_fs.h>
40 #include <linux/seq_file.h>
41 #include <linux/device.h>
42 #include <linux/init.h>
43 #include <linux/mutex.h>
44 #include <linux/kthread.h>
45 #include <linux/io.h>
46
47 #include <asm/dma.h>
48 #include <asm/ecard.h>
49 #include <asm/hardware.h>
50 #include <asm/irq.h>
51 #include <asm/mmu_context.h>
52 #include <asm/mach/irq.h>
53 #include <asm/tlbflush.h>
54
55 #include "ecard.h"
56
57 #ifndef CONFIG_ARCH_RPC
58 #define HAVE_EXPMASK
59 #endif
60
61 struct ecard_request {
62         void            (*fn)(struct ecard_request *);
63         ecard_t         *ec;
64         unsigned int    address;
65         unsigned int    length;
66         unsigned int    use_loader;
67         void            *buffer;
68         struct completion *complete;
69 };
70
71 struct expcard_blacklist {
72         unsigned short   manufacturer;
73         unsigned short   product;
74         const char      *type;
75 };
76
77 static ecard_t *cards;
78 static ecard_t *slot_to_expcard[MAX_ECARDS];
79 static unsigned int ectcr;
80 #ifdef HAS_EXPMASK
81 static unsigned int have_expmask;
82 #endif
83
84 /* List of descriptions of cards which don't have an extended
85  * identification, or chunk directories containing a description.
86  */
87 static struct expcard_blacklist __initdata blacklist[] = {
88         { MANU_ACORN, PROD_ACORN_ETHER1, "Acorn Ether1" }
89 };
90
91 asmlinkage extern int
92 ecard_loader_reset(unsigned long base, loader_t loader);
93 asmlinkage extern int
94 ecard_loader_read(int off, unsigned long base, loader_t loader);
95
96 static inline unsigned short ecard_getu16(unsigned char *v)
97 {
98         return v[0] | v[1] << 8;
99 }
100
101 static inline signed long ecard_gets24(unsigned char *v)
102 {
103         return v[0] | v[1] << 8 | v[2] << 16 | ((v[2] & 0x80) ? 0xff000000 : 0);
104 }
105
106 static inline ecard_t *slot_to_ecard(unsigned int slot)
107 {
108         return slot < MAX_ECARDS ? slot_to_expcard[slot] : NULL;
109 }
110
111 /* ===================== Expansion card daemon ======================== */
112 /*
113  * Since the loader programs on the expansion cards need to be run
114  * in a specific environment, create a separate task with this
115  * environment up, and pass requests to this task as and when we
116  * need to.
117  *
118  * This should allow 99% of loaders to be called from Linux.
119  *
120  * From a security standpoint, we trust the card vendors.  This
121  * may be a misplaced trust.
122  */
123 static void ecard_task_reset(struct ecard_request *req)
124 {
125         struct expansion_card *ec = req->ec;
126         struct resource *res;
127
128         res = ec->slot_no == 8
129                 ? &ec->resource[ECARD_RES_MEMC]
130                 : ec->easi
131                   ? &ec->resource[ECARD_RES_EASI]
132                   : &ec->resource[ECARD_RES_IOCSYNC];
133
134         ecard_loader_reset(res->start, ec->loader);
135 }
136
137 static void ecard_task_readbytes(struct ecard_request *req)
138 {
139         struct expansion_card *ec = req->ec;
140         unsigned char *buf = req->buffer;
141         unsigned int len = req->length;
142         unsigned int off = req->address;
143
144         if (ec->slot_no == 8) {
145                 void __iomem *base = (void __iomem *)
146                                 ec->resource[ECARD_RES_MEMC].start;
147
148                 /*
149                  * The card maintains an index which increments the address
150                  * into a 4096-byte page on each access.  We need to keep
151                  * track of the counter.
152                  */
153                 static unsigned int index;
154                 unsigned int page;
155
156                 page = (off >> 12) * 4;
157                 if (page > 256 * 4)
158                         return;
159
160                 off &= 4095;
161
162                 /*
163                  * If we are reading offset 0, or our current index is
164                  * greater than the offset, reset the hardware index counter.
165                  */
166                 if (off == 0 || index > off) {
167                         writeb(0, base);
168                         index = 0;
169                 }
170
171                 /*
172                  * Increment the hardware index counter until we get to the
173                  * required offset.  The read bytes are discarded.
174                  */
175                 while (index < off) {
176                         readb(base + page);
177                         index += 1;
178                 }
179
180                 while (len--) {
181                         *buf++ = readb(base + page);
182                         index += 1;
183                 }
184         } else {
185                 unsigned long base = (ec->easi
186                          ? &ec->resource[ECARD_RES_EASI]
187                          : &ec->resource[ECARD_RES_IOCSYNC])->start;
188                 void __iomem *pbase = (void __iomem *)base;
189
190                 if (!req->use_loader || !ec->loader) {
191                         off *= 4;
192                         while (len--) {
193                                 *buf++ = readb(pbase + off);
194                                 off += 4;
195                         }
196                 } else {
197                         while(len--) {
198                                 /*
199                                  * The following is required by some
200                                  * expansion card loader programs.
201                                  */
202                                 *(unsigned long *)0x108 = 0;
203                                 *buf++ = ecard_loader_read(off++, base,
204                                                            ec->loader);
205                         }
206                 }
207         }
208
209 }
210
211 static DECLARE_WAIT_QUEUE_HEAD(ecard_wait);
212 static struct ecard_request *ecard_req;
213 static DEFINE_MUTEX(ecard_mutex);
214
215 /*
216  * Set up the expansion card daemon's page tables.
217  */
218 static void ecard_init_pgtables(struct mm_struct *mm)
219 {
220         struct vm_area_struct vma;
221
222         /* We want to set up the page tables for the following mapping:
223          *  Virtual     Physical
224          *  0x03000000  0x03000000
225          *  0x03010000  unmapped
226          *  0x03210000  0x03210000
227          *  0x03400000  unmapped
228          *  0x08000000  0x08000000
229          *  0x10000000  unmapped
230          *
231          * FIXME: we don't follow this 100% yet.
232          */
233         pgd_t *src_pgd, *dst_pgd;
234
235         src_pgd = pgd_offset(mm, (unsigned long)IO_BASE);
236         dst_pgd = pgd_offset(mm, IO_START);
237
238         memcpy(dst_pgd, src_pgd, sizeof(pgd_t) * (IO_SIZE / PGDIR_SIZE));
239
240         src_pgd = pgd_offset(mm, EASI_BASE);
241         dst_pgd = pgd_offset(mm, EASI_START);
242
243         memcpy(dst_pgd, src_pgd, sizeof(pgd_t) * (EASI_SIZE / PGDIR_SIZE));
244
245         vma.vm_mm = mm;
246
247         flush_tlb_range(&vma, IO_START, IO_START + IO_SIZE);
248         flush_tlb_range(&vma, EASI_START, EASI_START + EASI_SIZE);
249 }
250
251 static int ecard_init_mm(void)
252 {
253         struct mm_struct * mm = mm_alloc();
254         struct mm_struct *active_mm = current->active_mm;
255
256         if (!mm)
257                 return -ENOMEM;
258
259         current->mm = mm;
260         current->active_mm = mm;
261         activate_mm(active_mm, mm);
262         mmdrop(active_mm);
263         ecard_init_pgtables(mm);
264         return 0;
265 }
266
267 static int
268 ecard_task(void * unused)
269 {
270         /*
271          * Allocate a mm.  We're not a lazy-TLB kernel task since we need
272          * to set page table entries where the user space would be.  Note
273          * that this also creates the page tables.  Failure is not an
274          * option here.
275          */
276         if (ecard_init_mm())
277                 panic("kecardd: unable to alloc mm\n");
278
279         while (1) {
280                 struct ecard_request *req;
281
282                 wait_event_interruptible(ecard_wait, ecard_req != NULL);
283
284                 req = xchg(&ecard_req, NULL);
285                 if (req != NULL) {
286                         req->fn(req);
287                         complete(req->complete);
288                 }
289         }
290 }
291
292 /*
293  * Wake the expansion card daemon to action our request.
294  *
295  * FIXME: The test here is not sufficient to detect if the
296  * kcardd is running.
297  */
298 static void ecard_call(struct ecard_request *req)
299 {
300         DECLARE_COMPLETION_ONSTACK(completion);
301
302         req->complete = &completion;
303
304         mutex_lock(&ecard_mutex);
305         ecard_req = req;
306         wake_up(&ecard_wait);
307
308         /*
309          * Now wait for kecardd to run.
310          */
311         wait_for_completion(&completion);
312         mutex_unlock(&ecard_mutex);
313 }
314
315 /* ======================= Mid-level card control ===================== */
316
317 static void
318 ecard_readbytes(void *addr, ecard_t *ec, int off, int len, int useld)
319 {
320         struct ecard_request req;
321
322         req.fn          = ecard_task_readbytes;
323         req.ec          = ec;
324         req.address     = off;
325         req.length      = len;
326         req.use_loader  = useld;
327         req.buffer      = addr;
328
329         ecard_call(&req);
330 }
331
332 int ecard_readchunk(struct in_chunk_dir *cd, ecard_t *ec, int id, int num)
333 {
334         struct ex_chunk_dir excd;
335         int index = 16;
336         int useld = 0;
337
338         if (!ec->cid.cd)
339                 return 0;
340
341         while(1) {
342                 ecard_readbytes(&excd, ec, index, 8, useld);
343                 index += 8;
344                 if (c_id(&excd) == 0) {
345                         if (!useld && ec->loader) {
346                                 useld = 1;
347                                 index = 0;
348                                 continue;
349                         }
350                         return 0;
351                 }
352                 if (c_id(&excd) == 0xf0) { /* link */
353                         index = c_start(&excd);
354                         continue;
355                 }
356                 if (c_id(&excd) == 0x80) { /* loader */
357                         if (!ec->loader) {
358                                 ec->loader = kmalloc(c_len(&excd),
359                                                                GFP_KERNEL);
360                                 if (ec->loader)
361                                         ecard_readbytes(ec->loader, ec,
362                                                         (int)c_start(&excd),
363                                                         c_len(&excd), useld);
364                                 else
365                                         return 0;
366                         }
367                         continue;
368                 }
369                 if (c_id(&excd) == id && num-- == 0)
370                         break;
371         }
372
373         if (c_id(&excd) & 0x80) {
374                 switch (c_id(&excd) & 0x70) {
375                 case 0x70:
376                         ecard_readbytes((unsigned char *)excd.d.string, ec,
377                                         (int)c_start(&excd), c_len(&excd),
378                                         useld);
379                         break;
380                 case 0x00:
381                         break;
382                 }
383         }
384         cd->start_offset = c_start(&excd);
385         memcpy(cd->d.string, excd.d.string, 256);
386         return 1;
387 }
388
389 /* ======================= Interrupt control ============================ */
390
391 static void ecard_def_irq_enable(ecard_t *ec, int irqnr)
392 {
393 #ifdef HAS_EXPMASK
394         if (irqnr < 4 && have_expmask) {
395                 have_expmask |= 1 << irqnr;
396                 __raw_writeb(have_expmask, EXPMASK_ENABLE);
397         }
398 #endif
399 }
400
401 static void ecard_def_irq_disable(ecard_t *ec, int irqnr)
402 {
403 #ifdef HAS_EXPMASK
404         if (irqnr < 4 && have_expmask) {
405                 have_expmask &= ~(1 << irqnr);
406                 __raw_writeb(have_expmask, EXPMASK_ENABLE);
407         }
408 #endif
409 }
410
411 static int ecard_def_irq_pending(ecard_t *ec)
412 {
413         return !ec->irqmask || readb(ec->irqaddr) & ec->irqmask;
414 }
415
416 static void ecard_def_fiq_enable(ecard_t *ec, int fiqnr)
417 {
418         panic("ecard_def_fiq_enable called - impossible");
419 }
420
421 static void ecard_def_fiq_disable(ecard_t *ec, int fiqnr)
422 {
423         panic("ecard_def_fiq_disable called - impossible");
424 }
425
426 static int ecard_def_fiq_pending(ecard_t *ec)
427 {
428         return !ec->fiqmask || readb(ec->fiqaddr) & ec->fiqmask;
429 }
430
431 static expansioncard_ops_t ecard_default_ops = {
432         ecard_def_irq_enable,
433         ecard_def_irq_disable,
434         ecard_def_irq_pending,
435         ecard_def_fiq_enable,
436         ecard_def_fiq_disable,
437         ecard_def_fiq_pending
438 };
439
440 /*
441  * Enable and disable interrupts from expansion cards.
442  * (interrupts are disabled for these functions).
443  *
444  * They are not meant to be called directly, but via enable/disable_irq.
445  */
446 static void ecard_irq_unmask(unsigned int irqnr)
447 {
448         ecard_t *ec = slot_to_ecard(irqnr - 32);
449
450         if (ec) {
451                 if (!ec->ops)
452                         ec->ops = &ecard_default_ops;
453
454                 if (ec->claimed && ec->ops->irqenable)
455                         ec->ops->irqenable(ec, irqnr);
456                 else
457                         printk(KERN_ERR "ecard: rejecting request to "
458                                 "enable IRQs for %d\n", irqnr);
459         }
460 }
461
462 static void ecard_irq_mask(unsigned int irqnr)
463 {
464         ecard_t *ec = slot_to_ecard(irqnr - 32);
465
466         if (ec) {
467                 if (!ec->ops)
468                         ec->ops = &ecard_default_ops;
469
470                 if (ec->ops && ec->ops->irqdisable)
471                         ec->ops->irqdisable(ec, irqnr);
472         }
473 }
474
475 static struct irq_chip ecard_chip = {
476         .name   = "ECARD",
477         .ack    = ecard_irq_mask,
478         .mask   = ecard_irq_mask,
479         .unmask = ecard_irq_unmask,
480 };
481
482 void ecard_enablefiq(unsigned int fiqnr)
483 {
484         ecard_t *ec = slot_to_ecard(fiqnr);
485
486         if (ec) {
487                 if (!ec->ops)
488                         ec->ops = &ecard_default_ops;
489
490                 if (ec->claimed && ec->ops->fiqenable)
491                         ec->ops->fiqenable(ec, fiqnr);
492                 else
493                         printk(KERN_ERR "ecard: rejecting request to "
494                                 "enable FIQs for %d\n", fiqnr);
495         }
496 }
497
498 void ecard_disablefiq(unsigned int fiqnr)
499 {
500         ecard_t *ec = slot_to_ecard(fiqnr);
501
502         if (ec) {
503                 if (!ec->ops)
504                         ec->ops = &ecard_default_ops;
505
506                 if (ec->ops->fiqdisable)
507                         ec->ops->fiqdisable(ec, fiqnr);
508         }
509 }
510
511 static void ecard_dump_irq_state(void)
512 {
513         ecard_t *ec;
514
515         printk("Expansion card IRQ state:\n");
516
517         for (ec = cards; ec; ec = ec->next) {
518                 if (ec->slot_no == 8)
519                         continue;
520
521                 printk("  %d: %sclaimed, ",
522                        ec->slot_no, ec->claimed ? "" : "not ");
523
524                 if (ec->ops && ec->ops->irqpending &&
525                     ec->ops != &ecard_default_ops)
526                         printk("irq %spending\n",
527                                ec->ops->irqpending(ec) ? "" : "not ");
528                 else
529                         printk("irqaddr %p, mask = %02X, status = %02X\n",
530                                ec->irqaddr, ec->irqmask, readb(ec->irqaddr));
531         }
532 }
533
534 static void ecard_check_lockup(struct irq_desc *desc)
535 {
536         static unsigned long last;
537         static int lockup;
538
539         /*
540          * If the timer interrupt has not run since the last million
541          * unrecognised expansion card interrupts, then there is
542          * something seriously wrong.  Disable the expansion card
543          * interrupts so at least we can continue.
544          *
545          * Maybe we ought to start a timer to re-enable them some time
546          * later?
547          */
548         if (last == jiffies) {
549                 lockup += 1;
550                 if (lockup > 1000000) {
551                         printk(KERN_ERR "\nInterrupt lockup detected - "
552                                "disabling all expansion card interrupts\n");
553
554                         desc->chip->mask(IRQ_EXPANSIONCARD);
555                         ecard_dump_irq_state();
556                 }
557         } else
558                 lockup = 0;
559
560         /*
561          * If we did not recognise the source of this interrupt,
562          * warn the user, but don't flood the user with these messages.
563          */
564         if (!last || time_after(jiffies, last + 5*HZ)) {
565                 last = jiffies;
566                 printk(KERN_WARNING "Unrecognised interrupt from backplane\n");
567                 ecard_dump_irq_state();
568         }
569 }
570
571 static void
572 ecard_irq_handler(unsigned int irq, struct irq_desc *desc)
573 {
574         ecard_t *ec;
575         int called = 0;
576
577         desc->chip->mask(irq);
578         for (ec = cards; ec; ec = ec->next) {
579                 int pending;
580
581                 if (!ec->claimed || ec->irq == NO_IRQ || ec->slot_no == 8)
582                         continue;
583
584                 if (ec->ops && ec->ops->irqpending)
585                         pending = ec->ops->irqpending(ec);
586                 else
587                         pending = ecard_default_ops.irqpending(ec);
588
589                 if (pending) {
590                         struct irq_desc *d = irq_desc + ec->irq;
591                         desc_handle_irq(ec->irq, d);
592                         called ++;
593                 }
594         }
595         desc->chip->unmask(irq);
596
597         if (called == 0)
598                 ecard_check_lockup(desc);
599 }
600
601 #ifdef HAS_EXPMASK
602 static unsigned char priority_masks[] =
603 {
604         0xf0, 0xf1, 0xf3, 0xf7, 0xff, 0xff, 0xff, 0xff
605 };
606
607 static unsigned char first_set[] =
608 {
609         0x00, 0x00, 0x01, 0x00, 0x02, 0x00, 0x01, 0x00,
610         0x03, 0x00, 0x01, 0x00, 0x02, 0x00, 0x01, 0x00
611 };
612
613 static void
614 ecard_irqexp_handler(unsigned int irq, struct irq_desc *desc)
615 {
616         const unsigned int statusmask = 15;
617         unsigned int status;
618
619         status = __raw_readb(EXPMASK_STATUS) & statusmask;
620         if (status) {
621                 unsigned int slot = first_set[status];
622                 ecard_t *ec = slot_to_ecard(slot);
623
624                 if (ec->claimed) {
625                         struct irq_desc *d = irq_desc + ec->irq;
626                         /*
627                          * this ugly code is so that we can operate a
628                          * prioritorising system:
629                          *
630                          * Card 0       highest priority
631                          * Card 1
632                          * Card 2
633                          * Card 3       lowest priority
634                          *
635                          * Serial cards should go in 0/1, ethernet/scsi in 2/3
636                          * otherwise you will lose serial data at high speeds!
637                          */
638                         desc_handle_irq(ec->irq, d);
639                 } else {
640                         printk(KERN_WARNING "card%d: interrupt from unclaimed "
641                                "card???\n", slot);
642                         have_expmask &= ~(1 << slot);
643                         __raw_writeb(have_expmask, EXPMASK_ENABLE);
644                 }
645         } else
646                 printk(KERN_WARNING "Wild interrupt from backplane (masks)\n");
647 }
648
649 static int __init ecard_probeirqhw(void)
650 {
651         ecard_t *ec;
652         int found;
653
654         __raw_writeb(0x00, EXPMASK_ENABLE);
655         __raw_writeb(0xff, EXPMASK_STATUS);
656         found = (__raw_readb(EXPMASK_STATUS) & 15) == 0;
657         __raw_writeb(0xff, EXPMASK_ENABLE);
658
659         if (found) {
660                 printk(KERN_DEBUG "Expansion card interrupt "
661                        "management hardware found\n");
662
663                 /* for each card present, set a bit to '1' */
664                 have_expmask = 0x80000000;
665
666                 for (ec = cards; ec; ec = ec->next)
667                         have_expmask |= 1 << ec->slot_no;
668
669                 __raw_writeb(have_expmask, EXPMASK_ENABLE);
670         }
671
672         return found;
673 }
674 #else
675 #define ecard_irqexp_handler NULL
676 #define ecard_probeirqhw() (0)
677 #endif
678
679 #ifndef IO_EC_MEMC8_BASE
680 #define IO_EC_MEMC8_BASE 0
681 #endif
682
683 static unsigned int __ecard_address(ecard_t *ec, card_type_t type, card_speed_t speed)
684 {
685         unsigned long address = 0;
686         int slot = ec->slot_no;
687
688         if (ec->slot_no == 8)
689                 return IO_EC_MEMC8_BASE;
690
691         ectcr &= ~(1 << slot);
692
693         switch (type) {
694         case ECARD_MEMC:
695                 if (slot < 4)
696                         address = IO_EC_MEMC_BASE + (slot << 12);
697                 break;
698
699         case ECARD_IOC:
700                 if (slot < 4)
701                         address = IO_EC_IOC_BASE + (slot << 12);
702 #ifdef IO_EC_IOC4_BASE
703                 else
704                         address = IO_EC_IOC4_BASE + ((slot - 4) << 12);
705 #endif
706                 if (address)
707                         address +=  speed << 17;
708                 break;
709
710 #ifdef IO_EC_EASI_BASE
711         case ECARD_EASI:
712                 address = IO_EC_EASI_BASE + (slot << 22);
713                 if (speed == ECARD_FAST)
714                         ectcr |= 1 << slot;
715                 break;
716 #endif
717         default:
718                 break;
719         }
720
721 #ifdef IOMD_ECTCR
722         iomd_writeb(ectcr, IOMD_ECTCR);
723 #endif
724         return address;
725 }
726
727 static int ecard_prints(struct seq_file *m, ecard_t *ec)
728 {
729         seq_printf(m, "  %d: %s ", ec->slot_no, ec->easi ? "EASI" : "    ");
730
731         if (ec->cid.id == 0) {
732                 struct in_chunk_dir incd;
733
734                 seq_printf(m, "[%04X:%04X] ",
735                         ec->cid.manufacturer, ec->cid.product);
736
737                 if (!ec->card_desc && ec->cid.cd &&
738                     ecard_readchunk(&incd, ec, 0xf5, 0)) {
739                         ec->card_desc = kmalloc(strlen(incd.d.string)+1, GFP_KERNEL);
740
741                         if (ec->card_desc)
742                                 strcpy((char *)ec->card_desc, incd.d.string);
743                 }
744
745                 seq_printf(m, "%s\n", ec->card_desc ? ec->card_desc : "*unknown*");
746         } else
747                 seq_printf(m, "Simple card %d\n", ec->cid.id);
748
749         return 0;
750 }
751
752 static int ecard_devices_proc_show(struct seq_file *m, void *v)
753 {
754         ecard_t *ec = cards;
755
756         while (ec) {
757                 ecard_prints(m, ec);
758                 ec = ec->next;
759         }
760         return 0;
761 }
762
763 static int ecard_devices_proc_open(struct inode *inode, struct file *file)
764 {
765         return single_open(file, ecard_devices_proc_show, NULL);
766 }
767
768 static const struct file_operations bus_ecard_proc_fops = {
769         .owner          = THIS_MODULE,
770         .open           = ecard_devices_proc_open,
771         .read           = seq_read,
772         .llseek         = seq_lseek,
773         .release        = single_release,
774 };
775
776 static struct proc_dir_entry *proc_bus_ecard_dir = NULL;
777
778 static void ecard_proc_init(void)
779 {
780         proc_bus_ecard_dir = proc_mkdir("bus/ecard", NULL);
781         proc_create("devices", 0, proc_bus_ecard_dir, &bus_ecard_proc_fops);
782 }
783
784 #define ec_set_resource(ec,nr,st,sz)                            \
785         do {                                                    \
786                 (ec)->resource[nr].name = ec->dev.bus_id;       \
787                 (ec)->resource[nr].start = st;                  \
788                 (ec)->resource[nr].end = (st) + (sz) - 1;       \
789                 (ec)->resource[nr].flags = IORESOURCE_MEM;      \
790         } while (0)
791
792 static void __init ecard_free_card(struct expansion_card *ec)
793 {
794         int i;
795
796         for (i = 0; i < ECARD_NUM_RESOURCES; i++)
797                 if (ec->resource[i].flags)
798                         release_resource(&ec->resource[i]);
799
800         kfree(ec);
801 }
802
803 static struct expansion_card *__init ecard_alloc_card(int type, int slot)
804 {
805         struct expansion_card *ec;
806         unsigned long base;
807         int i;
808
809         ec = kzalloc(sizeof(ecard_t), GFP_KERNEL);
810         if (!ec) {
811                 ec = ERR_PTR(-ENOMEM);
812                 goto nomem;
813         }
814
815         ec->slot_no = slot;
816         ec->easi = type == ECARD_EASI;
817         ec->irq = NO_IRQ;
818         ec->fiq = NO_IRQ;
819         ec->dma = NO_DMA;
820         ec->ops = &ecard_default_ops;
821
822         snprintf(ec->dev.bus_id, sizeof(ec->dev.bus_id), "ecard%d", slot);
823         ec->dev.parent = NULL;
824         ec->dev.bus = &ecard_bus_type;
825         ec->dev.dma_mask = &ec->dma_mask;
826         ec->dma_mask = (u64)0xffffffff;
827         ec->dev.coherent_dma_mask = ec->dma_mask;
828
829         if (slot < 4) {
830                 ec_set_resource(ec, ECARD_RES_MEMC,
831                                 PODSLOT_MEMC_BASE + (slot << 14),
832                                 PODSLOT_MEMC_SIZE);
833                 base = PODSLOT_IOC0_BASE + (slot << 14);
834         } else
835                 base = PODSLOT_IOC4_BASE + ((slot - 4) << 14);
836
837 #ifdef CONFIG_ARCH_RPC
838         if (slot < 8) {
839                 ec_set_resource(ec, ECARD_RES_EASI,
840                                 PODSLOT_EASI_BASE + (slot << 24),
841                                 PODSLOT_EASI_SIZE);
842         }
843
844         if (slot == 8) {
845                 ec_set_resource(ec, ECARD_RES_MEMC, NETSLOT_BASE, NETSLOT_SIZE);
846         } else
847 #endif
848
849         for (i = 0; i <= ECARD_RES_IOCSYNC - ECARD_RES_IOCSLOW; i++)
850                 ec_set_resource(ec, i + ECARD_RES_IOCSLOW,
851                                 base + (i << 19), PODSLOT_IOC_SIZE);
852
853         for (i = 0; i < ECARD_NUM_RESOURCES; i++) {
854                 if (ec->resource[i].flags &&
855                     request_resource(&iomem_resource, &ec->resource[i])) {
856                         printk(KERN_ERR "%s: resource(s) not available\n",
857                                 ec->dev.bus_id);
858                         ec->resource[i].end -= ec->resource[i].start;
859                         ec->resource[i].start = 0;
860                         ec->resource[i].flags = 0;
861                 }
862         }
863
864  nomem:
865         return ec;
866 }
867
868 static ssize_t ecard_show_irq(struct device *dev, struct device_attribute *attr, char *buf)
869 {
870         struct expansion_card *ec = ECARD_DEV(dev);
871         return sprintf(buf, "%u\n", ec->irq);
872 }
873
874 static ssize_t ecard_show_dma(struct device *dev, struct device_attribute *attr, char *buf)
875 {
876         struct expansion_card *ec = ECARD_DEV(dev);
877         return sprintf(buf, "%u\n", ec->dma);
878 }
879
880 static ssize_t ecard_show_resources(struct device *dev, struct device_attribute *attr, char *buf)
881 {
882         struct expansion_card *ec = ECARD_DEV(dev);
883         char *str = buf;
884         int i;
885
886         for (i = 0; i < ECARD_NUM_RESOURCES; i++)
887                 str += sprintf(str, "%08x %08x %08lx\n",
888                                 ec->resource[i].start,
889                                 ec->resource[i].end,
890                                 ec->resource[i].flags);
891
892         return str - buf;
893 }
894
895 static ssize_t ecard_show_vendor(struct device *dev, struct device_attribute *attr, char *buf)
896 {
897         struct expansion_card *ec = ECARD_DEV(dev);
898         return sprintf(buf, "%u\n", ec->cid.manufacturer);
899 }
900
901 static ssize_t ecard_show_device(struct device *dev, struct device_attribute *attr, char *buf)
902 {
903         struct expansion_card *ec = ECARD_DEV(dev);
904         return sprintf(buf, "%u\n", ec->cid.product);
905 }
906
907 static ssize_t ecard_show_type(struct device *dev, struct device_attribute *attr, char *buf)
908 {
909         struct expansion_card *ec = ECARD_DEV(dev);
910         return sprintf(buf, "%s\n", ec->easi ? "EASI" : "IOC");
911 }
912
913 static struct device_attribute ecard_dev_attrs[] = {
914         __ATTR(device,   S_IRUGO, ecard_show_device,    NULL),
915         __ATTR(dma,      S_IRUGO, ecard_show_dma,       NULL),
916         __ATTR(irq,      S_IRUGO, ecard_show_irq,       NULL),
917         __ATTR(resource, S_IRUGO, ecard_show_resources, NULL),
918         __ATTR(type,     S_IRUGO, ecard_show_type,      NULL),
919         __ATTR(vendor,   S_IRUGO, ecard_show_vendor,    NULL),
920         __ATTR_NULL,
921 };
922
923
924 int ecard_request_resources(struct expansion_card *ec)
925 {
926         int i, err = 0;
927
928         for (i = 0; i < ECARD_NUM_RESOURCES; i++) {
929                 if (ecard_resource_end(ec, i) &&
930                     !request_mem_region(ecard_resource_start(ec, i),
931                                         ecard_resource_len(ec, i),
932                                         ec->dev.driver->name)) {
933                         err = -EBUSY;
934                         break;
935                 }
936         }
937
938         if (err) {
939                 while (i--)
940                         if (ecard_resource_end(ec, i))
941                                 release_mem_region(ecard_resource_start(ec, i),
942                                                    ecard_resource_len(ec, i));
943         }
944         return err;
945 }
946 EXPORT_SYMBOL(ecard_request_resources);
947
948 void ecard_release_resources(struct expansion_card *ec)
949 {
950         int i;
951
952         for (i = 0; i < ECARD_NUM_RESOURCES; i++)
953                 if (ecard_resource_end(ec, i))
954                         release_mem_region(ecard_resource_start(ec, i),
955                                            ecard_resource_len(ec, i));
956 }
957 EXPORT_SYMBOL(ecard_release_resources);
958
959 void ecard_setirq(struct expansion_card *ec, const struct expansion_card_ops *ops, void *irq_data)
960 {
961         ec->irq_data = irq_data;
962         barrier();
963         ec->ops = ops;
964 }
965 EXPORT_SYMBOL(ecard_setirq);
966
967 void __iomem *ecardm_iomap(struct expansion_card *ec, unsigned int res,
968                            unsigned long offset, unsigned long maxsize)
969 {
970         unsigned long start = ecard_resource_start(ec, res);
971         unsigned long end = ecard_resource_end(ec, res);
972
973         if (offset > (end - start))
974                 return NULL;
975
976         start += offset;
977         if (maxsize && end - start > maxsize)
978                 end = start + maxsize;
979         
980         return devm_ioremap(&ec->dev, start, end - start);
981 }
982 EXPORT_SYMBOL(ecardm_iomap);
983
984 /*
985  * Probe for an expansion card.
986  *
987  * If bit 1 of the first byte of the card is set, then the
988  * card does not exist.
989  */
990 static int __init
991 ecard_probe(int slot, card_type_t type)
992 {
993         ecard_t **ecp;
994         ecard_t *ec;
995         struct ex_ecid cid;
996         int i, rc;
997
998         ec = ecard_alloc_card(type, slot);
999         if (IS_ERR(ec)) {
1000                 rc = PTR_ERR(ec);
1001                 goto nomem;
1002         }
1003
1004         rc = -ENODEV;
1005         if ((ec->podaddr = __ecard_address(ec, type, ECARD_SYNC)) == 0)
1006                 goto nodev;
1007
1008         cid.r_zero = 1;
1009         ecard_readbytes(&cid, ec, 0, 16, 0);
1010         if (cid.r_zero)
1011                 goto nodev;
1012
1013         ec->cid.id      = cid.r_id;
1014         ec->cid.cd      = cid.r_cd;
1015         ec->cid.is      = cid.r_is;
1016         ec->cid.w       = cid.r_w;
1017         ec->cid.manufacturer = ecard_getu16(cid.r_manu);
1018         ec->cid.product = ecard_getu16(cid.r_prod);
1019         ec->cid.country = cid.r_country;
1020         ec->cid.irqmask = cid.r_irqmask;
1021         ec->cid.irqoff  = ecard_gets24(cid.r_irqoff);
1022         ec->cid.fiqmask = cid.r_fiqmask;
1023         ec->cid.fiqoff  = ecard_gets24(cid.r_fiqoff);
1024         ec->fiqaddr     =
1025         ec->irqaddr     = (void __iomem *)ioaddr(ec->podaddr);
1026
1027         if (ec->cid.is) {
1028                 ec->irqmask = ec->cid.irqmask;
1029                 ec->irqaddr += ec->cid.irqoff;
1030                 ec->fiqmask = ec->cid.fiqmask;
1031                 ec->fiqaddr += ec->cid.fiqoff;
1032         } else {
1033                 ec->irqmask = 1;
1034                 ec->fiqmask = 4;
1035         }
1036
1037         for (i = 0; i < ARRAY_SIZE(blacklist); i++)
1038                 if (blacklist[i].manufacturer == ec->cid.manufacturer &&
1039                     blacklist[i].product == ec->cid.product) {
1040                         ec->card_desc = blacklist[i].type;
1041                         break;
1042                 }
1043
1044         /*
1045          * hook the interrupt handlers
1046          */
1047         if (slot < 8) {
1048                 ec->irq = 32 + slot;
1049                 set_irq_chip(ec->irq, &ecard_chip);
1050                 set_irq_handler(ec->irq, handle_level_irq);
1051                 set_irq_flags(ec->irq, IRQF_VALID);
1052         }
1053
1054 #ifdef IO_EC_MEMC8_BASE
1055         if (slot == 8)
1056                 ec->irq = 11;
1057 #endif
1058 #ifdef CONFIG_ARCH_RPC
1059         /* On RiscPC, only first two slots have DMA capability */
1060         if (slot < 2)
1061                 ec->dma = 2 + slot;
1062 #endif
1063
1064         for (ecp = &cards; *ecp; ecp = &(*ecp)->next);
1065
1066         *ecp = ec;
1067         slot_to_expcard[slot] = ec;
1068
1069         device_register(&ec->dev);
1070
1071         return 0;
1072
1073  nodev:
1074         ecard_free_card(ec);
1075  nomem:
1076         return rc;
1077 }
1078
1079 /*
1080  * Initialise the expansion card system.
1081  * Locate all hardware - interrupt management and
1082  * actual cards.
1083  */
1084 static int __init ecard_init(void)
1085 {
1086         struct task_struct *task;
1087         int slot, irqhw;
1088
1089         task = kthread_run(ecard_task, NULL, "kecardd");
1090         if (IS_ERR(task)) {
1091                 printk(KERN_ERR "Ecard: unable to create kernel thread: %ld\n",
1092                        PTR_ERR(task));
1093                 return PTR_ERR(task);
1094         }
1095
1096         printk("Probing expansion cards\n");
1097
1098         for (slot = 0; slot < 8; slot ++) {
1099                 if (ecard_probe(slot, ECARD_EASI) == -ENODEV)
1100                         ecard_probe(slot, ECARD_IOC);
1101         }
1102
1103 #ifdef IO_EC_MEMC8_BASE
1104         ecard_probe(8, ECARD_IOC);
1105 #endif
1106
1107         irqhw = ecard_probeirqhw();
1108
1109         set_irq_chained_handler(IRQ_EXPANSIONCARD,
1110                                 irqhw ? ecard_irqexp_handler : ecard_irq_handler);
1111
1112         ecard_proc_init();
1113
1114         return 0;
1115 }
1116
1117 subsys_initcall(ecard_init);
1118
1119 /*
1120  *      ECARD "bus"
1121  */
1122 static const struct ecard_id *
1123 ecard_match_device(const struct ecard_id *ids, struct expansion_card *ec)
1124 {
1125         int i;
1126
1127         for (i = 0; ids[i].manufacturer != 65535; i++)
1128                 if (ec->cid.manufacturer == ids[i].manufacturer &&
1129                     ec->cid.product == ids[i].product)
1130                         return ids + i;
1131
1132         return NULL;
1133 }
1134
1135 static int ecard_drv_probe(struct device *dev)
1136 {
1137         struct expansion_card *ec = ECARD_DEV(dev);
1138         struct ecard_driver *drv = ECARD_DRV(dev->driver);
1139         const struct ecard_id *id;
1140         int ret;
1141
1142         id = ecard_match_device(drv->id_table, ec);
1143
1144         ec->claimed = 1;
1145         ret = drv->probe(ec, id);
1146         if (ret)
1147                 ec->claimed = 0;
1148         return ret;
1149 }
1150
1151 static int ecard_drv_remove(struct device *dev)
1152 {
1153         struct expansion_card *ec = ECARD_DEV(dev);
1154         struct ecard_driver *drv = ECARD_DRV(dev->driver);
1155
1156         drv->remove(ec);
1157         ec->claimed = 0;
1158
1159         /*
1160          * Restore the default operations.  We ensure that the
1161          * ops are set before we change the data.
1162          */
1163         ec->ops = &ecard_default_ops;
1164         barrier();
1165         ec->irq_data = NULL;
1166
1167         return 0;
1168 }
1169
1170 /*
1171  * Before rebooting, we must make sure that the expansion card is in a
1172  * sensible state, so it can be re-detected.  This means that the first
1173  * page of the ROM must be visible.  We call the expansion cards reset
1174  * handler, if any.
1175  */
1176 static void ecard_drv_shutdown(struct device *dev)
1177 {
1178         struct expansion_card *ec = ECARD_DEV(dev);
1179         struct ecard_driver *drv = ECARD_DRV(dev->driver);
1180         struct ecard_request req;
1181
1182         if (dev->driver) {
1183                 if (drv->shutdown)
1184                         drv->shutdown(ec);
1185                 ec->claimed = 0;
1186         }
1187
1188         /*
1189          * If this card has a loader, call the reset handler.
1190          */
1191         if (ec->loader) {
1192                 req.fn = ecard_task_reset;
1193                 req.ec = ec;
1194                 ecard_call(&req);
1195         }
1196 }
1197
1198 int ecard_register_driver(struct ecard_driver *drv)
1199 {
1200         drv->drv.bus = &ecard_bus_type;
1201
1202         return driver_register(&drv->drv);
1203 }
1204
1205 void ecard_remove_driver(struct ecard_driver *drv)
1206 {
1207         driver_unregister(&drv->drv);
1208 }
1209
1210 static int ecard_match(struct device *_dev, struct device_driver *_drv)
1211 {
1212         struct expansion_card *ec = ECARD_DEV(_dev);
1213         struct ecard_driver *drv = ECARD_DRV(_drv);
1214         int ret;
1215
1216         if (drv->id_table) {
1217                 ret = ecard_match_device(drv->id_table, ec) != NULL;
1218         } else {
1219                 ret = ec->cid.id == drv->id;
1220         }
1221
1222         return ret;
1223 }
1224
1225 struct bus_type ecard_bus_type = {
1226         .name           = "ecard",
1227         .dev_attrs      = ecard_dev_attrs,
1228         .match          = ecard_match,
1229         .probe          = ecard_drv_probe,
1230         .remove         = ecard_drv_remove,
1231         .shutdown       = ecard_drv_shutdown,
1232 };
1233
1234 static int ecard_bus_init(void)
1235 {
1236         return bus_register(&ecard_bus_type);
1237 }
1238
1239 postcore_initcall(ecard_bus_init);
1240
1241 EXPORT_SYMBOL(ecard_readchunk);
1242 EXPORT_SYMBOL(ecard_register_driver);
1243 EXPORT_SYMBOL(ecard_remove_driver);
1244 EXPORT_SYMBOL(ecard_bus_type);