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-rw-r--r--arch/arm/mach-rpc/Makefile2
-rw-r--r--arch/arm/mach-rpc/ecard.c1137
-rw-r--r--arch/arm/mach-rpc/ecard.h69
-rw-r--r--arch/arm/mach-rpc/include/mach/irqs.h2
-rw-r--r--arch/arm/mach-rpc/riscpc.c45
-rw-r--r--arch/arm/mach-rpc/time.c95
6 files changed, 1317 insertions, 33 deletions
diff --git a/arch/arm/mach-rpc/Makefile b/arch/arm/mach-rpc/Makefile
index aa77bc9efbbb..f89320739b09 100644
--- a/arch/arm/mach-rpc/Makefile
+++ b/arch/arm/mach-rpc/Makefile
@@ -4,7 +4,7 @@
4 4
5# Object file lists. 5# Object file lists.
6 6
7obj-y := dma.o irq.o riscpc.o 7obj-y := dma.o ecard.o irq.o riscpc.o time.o
8obj-m := 8obj-m :=
9obj-n := 9obj-n :=
10obj- := 10obj- :=
diff --git a/arch/arm/mach-rpc/ecard.c b/arch/arm/mach-rpc/ecard.c
new file mode 100644
index 000000000000..0c01567007c8
--- /dev/null
+++ b/arch/arm/mach-rpc/ecard.c
@@ -0,0 +1,1137 @@
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/irq.h>
46#include <linux/io.h>
47
48#include <asm/dma.h>
49#include <asm/ecard.h>
50#include <mach/hardware.h>
51#include <asm/irq.h>
52#include <asm/mmu_context.h>
53#include <asm/mach/irq.h>
54#include <asm/tlbflush.h>
55
56#include "ecard.h"
57
58struct ecard_request {
59 void (*fn)(struct ecard_request *);
60 ecard_t *ec;
61 unsigned int address;
62 unsigned int length;
63 unsigned int use_loader;
64 void *buffer;
65 struct completion *complete;
66};
67
68struct expcard_blacklist {
69 unsigned short manufacturer;
70 unsigned short product;
71 const char *type;
72};
73
74static ecard_t *cards;
75static ecard_t *slot_to_expcard[MAX_ECARDS];
76static unsigned int ectcr;
77
78/* List of descriptions of cards which don't have an extended
79 * identification, or chunk directories containing a description.
80 */
81static struct expcard_blacklist __initdata blacklist[] = {
82 { MANU_ACORN, PROD_ACORN_ETHER1, "Acorn Ether1" }
83};
84
85asmlinkage extern int
86ecard_loader_reset(unsigned long base, loader_t loader);
87asmlinkage extern int
88ecard_loader_read(int off, unsigned long base, loader_t loader);
89
90static inline unsigned short ecard_getu16(unsigned char *v)
91{
92 return v[0] | v[1] << 8;
93}
94
95static inline signed long ecard_gets24(unsigned char *v)
96{
97 return v[0] | v[1] << 8 | v[2] << 16 | ((v[2] & 0x80) ? 0xff000000 : 0);
98}
99
100static inline ecard_t *slot_to_ecard(unsigned int slot)
101{
102 return slot < MAX_ECARDS ? slot_to_expcard[slot] : NULL;
103}
104
105/* ===================== Expansion card daemon ======================== */
106/*
107 * Since the loader programs on the expansion cards need to be run
108 * in a specific environment, create a separate task with this
109 * environment up, and pass requests to this task as and when we
110 * need to.
111 *
112 * This should allow 99% of loaders to be called from Linux.
113 *
114 * From a security standpoint, we trust the card vendors. This
115 * may be a misplaced trust.
116 */
117static void ecard_task_reset(struct ecard_request *req)
118{
119 struct expansion_card *ec = req->ec;
120 struct resource *res;
121
122 res = ec->slot_no == 8
123 ? &ec->resource[ECARD_RES_MEMC]
124 : ec->easi
125 ? &ec->resource[ECARD_RES_EASI]
126 : &ec->resource[ECARD_RES_IOCSYNC];
127
128 ecard_loader_reset(res->start, ec->loader);
129}
130
131static void ecard_task_readbytes(struct ecard_request *req)
132{
133 struct expansion_card *ec = req->ec;
134 unsigned char *buf = req->buffer;
135 unsigned int len = req->length;
136 unsigned int off = req->address;
137
138 if (ec->slot_no == 8) {
139 void __iomem *base = (void __iomem *)
140 ec->resource[ECARD_RES_MEMC].start;
141
142 /*
143 * The card maintains an index which increments the address
144 * into a 4096-byte page on each access. We need to keep
145 * track of the counter.
146 */
147 static unsigned int index;
148 unsigned int page;
149
150 page = (off >> 12) * 4;
151 if (page > 256 * 4)
152 return;
153
154 off &= 4095;
155
156 /*
157 * If we are reading offset 0, or our current index is
158 * greater than the offset, reset the hardware index counter.
159 */
160 if (off == 0 || index > off) {
161 writeb(0, base);
162 index = 0;
163 }
164
165 /*
166 * Increment the hardware index counter until we get to the
167 * required offset. The read bytes are discarded.
168 */
169 while (index < off) {
170 readb(base + page);
171 index += 1;
172 }
173
174 while (len--) {
175 *buf++ = readb(base + page);
176 index += 1;
177 }
178 } else {
179 unsigned long base = (ec->easi
180 ? &ec->resource[ECARD_RES_EASI]
181 : &ec->resource[ECARD_RES_IOCSYNC])->start;
182 void __iomem *pbase = (void __iomem *)base;
183
184 if (!req->use_loader || !ec->loader) {
185 off *= 4;
186 while (len--) {
187 *buf++ = readb(pbase + off);
188 off += 4;
189 }
190 } else {
191 while(len--) {
192 /*
193 * The following is required by some
194 * expansion card loader programs.
195 */
196 *(unsigned long *)0x108 = 0;
197 *buf++ = ecard_loader_read(off++, base,
198 ec->loader);
199 }
200 }
201 }
202
203}
204
205static DECLARE_WAIT_QUEUE_HEAD(ecard_wait);
206static struct ecard_request *ecard_req;
207static DEFINE_MUTEX(ecard_mutex);
208
209/*
210 * Set up the expansion card daemon's page tables.
211 */
212static void ecard_init_pgtables(struct mm_struct *mm)
213{
214 struct vm_area_struct vma;
215
216 /* We want to set up the page tables for the following mapping:
217 * Virtual Physical
218 * 0x03000000 0x03000000
219 * 0x03010000 unmapped
220 * 0x03210000 0x03210000
221 * 0x03400000 unmapped
222 * 0x08000000 0x08000000
223 * 0x10000000 unmapped
224 *
225 * FIXME: we don't follow this 100% yet.
226 */
227 pgd_t *src_pgd, *dst_pgd;
228
229 src_pgd = pgd_offset(mm, (unsigned long)IO_BASE);
230 dst_pgd = pgd_offset(mm, IO_START);
231
232 memcpy(dst_pgd, src_pgd, sizeof(pgd_t) * (IO_SIZE / PGDIR_SIZE));
233
234 src_pgd = pgd_offset(mm, (unsigned long)EASI_BASE);
235 dst_pgd = pgd_offset(mm, EASI_START);
236
237 memcpy(dst_pgd, src_pgd, sizeof(pgd_t) * (EASI_SIZE / PGDIR_SIZE));
238
239 vma.vm_mm = mm;
240
241 flush_tlb_range(&vma, IO_START, IO_START + IO_SIZE);
242 flush_tlb_range(&vma, EASI_START, EASI_START + EASI_SIZE);
243}
244
245static int ecard_init_mm(void)
246{
247 struct mm_struct * mm = mm_alloc();
248 struct mm_struct *active_mm = current->active_mm;
249
250 if (!mm)
251 return -ENOMEM;
252
253 current->mm = mm;
254 current->active_mm = mm;
255 activate_mm(active_mm, mm);
256 mmdrop(active_mm);
257 ecard_init_pgtables(mm);
258 return 0;
259}
260
261static int
262ecard_task(void * unused)
263{
264 /*
265 * Allocate a mm. We're not a lazy-TLB kernel task since we need
266 * to set page table entries where the user space would be. Note
267 * that this also creates the page tables. Failure is not an
268 * option here.
269 */
270 if (ecard_init_mm())
271 panic("kecardd: unable to alloc mm\n");
272
273 while (1) {
274 struct ecard_request *req;
275
276 wait_event_interruptible(ecard_wait, ecard_req != NULL);
277
278 req = xchg(&ecard_req, NULL);
279 if (req != NULL) {
280 req->fn(req);
281 complete(req->complete);
282 }
283 }
284}
285
286/*
287 * Wake the expansion card daemon to action our request.
288 *
289 * FIXME: The test here is not sufficient to detect if the
290 * kcardd is running.
291 */
292static void ecard_call(struct ecard_request *req)
293{
294 DECLARE_COMPLETION_ONSTACK(completion);
295
296 req->complete = &completion;
297
298 mutex_lock(&ecard_mutex);
299 ecard_req = req;
300 wake_up(&ecard_wait);
301
302 /*
303 * Now wait for kecardd to run.
304 */
305 wait_for_completion(&completion);
306 mutex_unlock(&ecard_mutex);
307}
308
309/* ======================= Mid-level card control ===================== */
310
311static void
312ecard_readbytes(void *addr, ecard_t *ec, int off, int len, int useld)
313{
314 struct ecard_request req;
315
316 req.fn = ecard_task_readbytes;
317 req.ec = ec;
318 req.address = off;
319 req.length = len;
320 req.use_loader = useld;
321 req.buffer = addr;
322
323 ecard_call(&req);
324}
325
326int ecard_readchunk(struct in_chunk_dir *cd, ecard_t *ec, int id, int num)
327{
328 struct ex_chunk_dir excd;
329 int index = 16;
330 int useld = 0;
331
332 if (!ec->cid.cd)
333 return 0;
334
335 while(1) {
336 ecard_readbytes(&excd, ec, index, 8, useld);
337 index += 8;
338 if (c_id(&excd) == 0) {
339 if (!useld && ec->loader) {
340 useld = 1;
341 index = 0;
342 continue;
343 }
344 return 0;
345 }
346 if (c_id(&excd) == 0xf0) { /* link */
347 index = c_start(&excd);
348 continue;
349 }
350 if (c_id(&excd) == 0x80) { /* loader */
351 if (!ec->loader) {
352 ec->loader = kmalloc(c_len(&excd),
353 GFP_KERNEL);
354 if (ec->loader)
355 ecard_readbytes(ec->loader, ec,
356 (int)c_start(&excd),
357 c_len(&excd), useld);
358 else
359 return 0;
360 }
361 continue;
362 }
363 if (c_id(&excd) == id && num-- == 0)
364 break;
365 }
366
367 if (c_id(&excd) & 0x80) {
368 switch (c_id(&excd) & 0x70) {
369 case 0x70:
370 ecard_readbytes((unsigned char *)excd.d.string, ec,
371 (int)c_start(&excd), c_len(&excd),
372 useld);
373 break;
374 case 0x00:
375 break;
376 }
377 }
378 cd->start_offset = c_start(&excd);
379 memcpy(cd->d.string, excd.d.string, 256);
380 return 1;
381}
382
383/* ======================= Interrupt control ============================ */
384
385static void ecard_def_irq_enable(ecard_t *ec, int irqnr)
386{
387}
388
389static void ecard_def_irq_disable(ecard_t *ec, int irqnr)
390{
391}
392
393static int ecard_def_irq_pending(ecard_t *ec)
394{
395 return !ec->irqmask || readb(ec->irqaddr) & ec->irqmask;
396}
397
398static void ecard_def_fiq_enable(ecard_t *ec, int fiqnr)
399{
400 panic("ecard_def_fiq_enable called - impossible");
401}
402
403static void ecard_def_fiq_disable(ecard_t *ec, int fiqnr)
404{
405 panic("ecard_def_fiq_disable called - impossible");
406}
407
408static int ecard_def_fiq_pending(ecard_t *ec)
409{
410 return !ec->fiqmask || readb(ec->fiqaddr) & ec->fiqmask;
411}
412
413static expansioncard_ops_t ecard_default_ops = {
414 ecard_def_irq_enable,
415 ecard_def_irq_disable,
416 ecard_def_irq_pending,
417 ecard_def_fiq_enable,
418 ecard_def_fiq_disable,
419 ecard_def_fiq_pending
420};
421
422/*
423 * Enable and disable interrupts from expansion cards.
424 * (interrupts are disabled for these functions).
425 *
426 * They are not meant to be called directly, but via enable/disable_irq.
427 */
428static void ecard_irq_unmask(struct irq_data *d)
429{
430 ecard_t *ec = irq_data_get_irq_chip_data(d);
431
432 if (ec) {
433 if (!ec->ops)
434 ec->ops = &ecard_default_ops;
435
436 if (ec->claimed && ec->ops->irqenable)
437 ec->ops->irqenable(ec, d->irq);
438 else
439 printk(KERN_ERR "ecard: rejecting request to "
440 "enable IRQs for %d\n", d->irq);
441 }
442}
443
444static void ecard_irq_mask(struct irq_data *d)
445{
446 ecard_t *ec = irq_data_get_irq_chip_data(d);
447
448 if (ec) {
449 if (!ec->ops)
450 ec->ops = &ecard_default_ops;
451
452 if (ec->ops && ec->ops->irqdisable)
453 ec->ops->irqdisable(ec, d->irq);
454 }
455}
456
457static struct irq_chip ecard_chip = {
458 .name = "ECARD",
459 .irq_ack = ecard_irq_mask,
460 .irq_mask = ecard_irq_mask,
461 .irq_unmask = ecard_irq_unmask,
462};
463
464void ecard_enablefiq(unsigned int fiqnr)
465{
466 ecard_t *ec = slot_to_ecard(fiqnr);
467
468 if (ec) {
469 if (!ec->ops)
470 ec->ops = &ecard_default_ops;
471
472 if (ec->claimed && ec->ops->fiqenable)
473 ec->ops->fiqenable(ec, fiqnr);
474 else
475 printk(KERN_ERR "ecard: rejecting request to "
476 "enable FIQs for %d\n", fiqnr);
477 }
478}
479
480void ecard_disablefiq(unsigned int fiqnr)
481{
482 ecard_t *ec = slot_to_ecard(fiqnr);
483
484 if (ec) {
485 if (!ec->ops)
486 ec->ops = &ecard_default_ops;
487
488 if (ec->ops->fiqdisable)
489 ec->ops->fiqdisable(ec, fiqnr);
490 }
491}
492
493static void ecard_dump_irq_state(void)
494{
495 ecard_t *ec;
496
497 printk("Expansion card IRQ state:\n");
498
499 for (ec = cards; ec; ec = ec->next) {
500 if (ec->slot_no == 8)
501 continue;
502
503 printk(" %d: %sclaimed, ",
504 ec->slot_no, ec->claimed ? "" : "not ");
505
506 if (ec->ops && ec->ops->irqpending &&
507 ec->ops != &ecard_default_ops)
508 printk("irq %spending\n",
509 ec->ops->irqpending(ec) ? "" : "not ");
510 else
511 printk("irqaddr %p, mask = %02X, status = %02X\n",
512 ec->irqaddr, ec->irqmask, readb(ec->irqaddr));
513 }
514}
515
516static void ecard_check_lockup(struct irq_desc *desc)
517{
518 static unsigned long last;
519 static int lockup;
520
521 /*
522 * If the timer interrupt has not run since the last million
523 * unrecognised expansion card interrupts, then there is
524 * something seriously wrong. Disable the expansion card
525 * interrupts so at least we can continue.
526 *
527 * Maybe we ought to start a timer to re-enable them some time
528 * later?
529 */
530 if (last == jiffies) {
531 lockup += 1;
532 if (lockup > 1000000) {
533 printk(KERN_ERR "\nInterrupt lockup detected - "
534 "disabling all expansion card interrupts\n");
535
536 desc->irq_data.chip->irq_mask(&desc->irq_data);
537 ecard_dump_irq_state();
538 }
539 } else
540 lockup = 0;
541
542 /*
543 * If we did not recognise the source of this interrupt,
544 * warn the user, but don't flood the user with these messages.
545 */
546 if (!last || time_after(jiffies, last + 5*HZ)) {
547 last = jiffies;
548 printk(KERN_WARNING "Unrecognised interrupt from backplane\n");
549 ecard_dump_irq_state();
550 }
551}
552
553static void
554ecard_irq_handler(unsigned int irq, struct irq_desc *desc)
555{
556 ecard_t *ec;
557 int called = 0;
558
559 desc->irq_data.chip->irq_mask(&desc->irq_data);
560 for (ec = cards; ec; ec = ec->next) {
561 int pending;
562
563 if (!ec->claimed || !ec->irq || ec->slot_no == 8)
564 continue;
565
566 if (ec->ops && ec->ops->irqpending)
567 pending = ec->ops->irqpending(ec);
568 else
569 pending = ecard_default_ops.irqpending(ec);
570
571 if (pending) {
572 generic_handle_irq(ec->irq);
573 called ++;
574 }
575 }
576 desc->irq_data.chip->irq_unmask(&desc->irq_data);
577
578 if (called == 0)
579 ecard_check_lockup(desc);
580}
581
582static void __iomem *__ecard_address(ecard_t *ec, card_type_t type, card_speed_t speed)
583{
584 void __iomem *address = NULL;
585 int slot = ec->slot_no;
586
587 if (ec->slot_no == 8)
588 return ECARD_MEMC8_BASE;
589
590 ectcr &= ~(1 << slot);
591
592 switch (type) {
593 case ECARD_MEMC:
594 if (slot < 4)
595 address = ECARD_MEMC_BASE + (slot << 14);
596 break;
597
598 case ECARD_IOC:
599 if (slot < 4)
600 address = ECARD_IOC_BASE + (slot << 14);
601 else
602 address = ECARD_IOC4_BASE + ((slot - 4) << 14);
603 if (address)
604 address += speed << 19;
605 break;
606
607 case ECARD_EASI:
608 address = ECARD_EASI_BASE + (slot << 24);
609 if (speed == ECARD_FAST)
610 ectcr |= 1 << slot;
611 break;
612
613 default:
614 break;
615 }
616
617#ifdef IOMD_ECTCR
618 iomd_writeb(ectcr, IOMD_ECTCR);
619#endif
620 return address;
621}
622
623static int ecard_prints(struct seq_file *m, ecard_t *ec)
624{
625 seq_printf(m, " %d: %s ", ec->slot_no, ec->easi ? "EASI" : " ");
626
627 if (ec->cid.id == 0) {
628 struct in_chunk_dir incd;
629
630 seq_printf(m, "[%04X:%04X] ",
631 ec->cid.manufacturer, ec->cid.product);
632
633 if (!ec->card_desc && ec->cid.cd &&
634 ecard_readchunk(&incd, ec, 0xf5, 0)) {
635 ec->card_desc = kmalloc(strlen(incd.d.string)+1, GFP_KERNEL);
636
637 if (ec->card_desc)
638 strcpy((char *)ec->card_desc, incd.d.string);
639 }
640
641 seq_printf(m, "%s\n", ec->card_desc ? ec->card_desc : "*unknown*");
642 } else
643 seq_printf(m, "Simple card %d\n", ec->cid.id);
644
645 return 0;
646}
647
648static int ecard_devices_proc_show(struct seq_file *m, void *v)
649{
650 ecard_t *ec = cards;
651
652 while (ec) {
653 ecard_prints(m, ec);
654 ec = ec->next;
655 }
656 return 0;
657}
658
659static int ecard_devices_proc_open(struct inode *inode, struct file *file)
660{
661 return single_open(file, ecard_devices_proc_show, NULL);
662}
663
664static const struct file_operations bus_ecard_proc_fops = {
665 .owner = THIS_MODULE,
666 .open = ecard_devices_proc_open,
667 .read = seq_read,
668 .llseek = seq_lseek,
669 .release = single_release,
670};
671
672static struct proc_dir_entry *proc_bus_ecard_dir = NULL;
673
674static void ecard_proc_init(void)
675{
676 proc_bus_ecard_dir = proc_mkdir("bus/ecard", NULL);
677 proc_create("devices", 0, proc_bus_ecard_dir, &bus_ecard_proc_fops);
678}
679
680#define ec_set_resource(ec,nr,st,sz) \
681 do { \
682 (ec)->resource[nr].name = dev_name(&ec->dev); \
683 (ec)->resource[nr].start = st; \
684 (ec)->resource[nr].end = (st) + (sz) - 1; \
685 (ec)->resource[nr].flags = IORESOURCE_MEM; \
686 } while (0)
687
688static void __init ecard_free_card(struct expansion_card *ec)
689{
690 int i;
691
692 for (i = 0; i < ECARD_NUM_RESOURCES; i++)
693 if (ec->resource[i].flags)
694 release_resource(&ec->resource[i]);
695
696 kfree(ec);
697}
698
699static struct expansion_card *__init ecard_alloc_card(int type, int slot)
700{
701 struct expansion_card *ec;
702 unsigned long base;
703 int i;
704
705 ec = kzalloc(sizeof(ecard_t), GFP_KERNEL);
706 if (!ec) {
707 ec = ERR_PTR(-ENOMEM);
708 goto nomem;
709 }
710
711 ec->slot_no = slot;
712 ec->easi = type == ECARD_EASI;
713 ec->irq = 0;
714 ec->fiq = 0;
715 ec->dma = NO_DMA;
716 ec->ops = &ecard_default_ops;
717
718 dev_set_name(&ec->dev, "ecard%d", slot);
719 ec->dev.parent = NULL;
720 ec->dev.bus = &ecard_bus_type;
721 ec->dev.dma_mask = &ec->dma_mask;
722 ec->dma_mask = (u64)0xffffffff;
723 ec->dev.coherent_dma_mask = ec->dma_mask;
724
725 if (slot < 4) {
726 ec_set_resource(ec, ECARD_RES_MEMC,
727 PODSLOT_MEMC_BASE + (slot << 14),
728 PODSLOT_MEMC_SIZE);
729 base = PODSLOT_IOC0_BASE + (slot << 14);
730 } else
731 base = PODSLOT_IOC4_BASE + ((slot - 4) << 14);
732
733#ifdef CONFIG_ARCH_RPC
734 if (slot < 8) {
735 ec_set_resource(ec, ECARD_RES_EASI,
736 PODSLOT_EASI_BASE + (slot << 24),
737 PODSLOT_EASI_SIZE);
738 }
739
740 if (slot == 8) {
741 ec_set_resource(ec, ECARD_RES_MEMC, NETSLOT_BASE, NETSLOT_SIZE);
742 } else
743#endif
744
745 for (i = 0; i <= ECARD_RES_IOCSYNC - ECARD_RES_IOCSLOW; i++)
746 ec_set_resource(ec, i + ECARD_RES_IOCSLOW,
747 base + (i << 19), PODSLOT_IOC_SIZE);
748
749 for (i = 0; i < ECARD_NUM_RESOURCES; i++) {
750 if (ec->resource[i].flags &&
751 request_resource(&iomem_resource, &ec->resource[i])) {
752 dev_err(&ec->dev, "resource(s) not available\n");
753 ec->resource[i].end -= ec->resource[i].start;
754 ec->resource[i].start = 0;
755 ec->resource[i].flags = 0;
756 }
757 }
758
759 nomem:
760 return ec;
761}
762
763static ssize_t ecard_show_irq(struct device *dev, struct device_attribute *attr, char *buf)
764{
765 struct expansion_card *ec = ECARD_DEV(dev);
766 return sprintf(buf, "%u\n", ec->irq);
767}
768
769static ssize_t ecard_show_dma(struct device *dev, struct device_attribute *attr, char *buf)
770{
771 struct expansion_card *ec = ECARD_DEV(dev);
772 return sprintf(buf, "%u\n", ec->dma);
773}
774
775static ssize_t ecard_show_resources(struct device *dev, struct device_attribute *attr, char *buf)
776{
777 struct expansion_card *ec = ECARD_DEV(dev);
778 char *str = buf;
779 int i;
780
781 for (i = 0; i < ECARD_NUM_RESOURCES; i++)
782 str += sprintf(str, "%08x %08x %08lx\n",
783 ec->resource[i].start,
784 ec->resource[i].end,
785 ec->resource[i].flags);
786
787 return str - buf;
788}
789
790static ssize_t ecard_show_vendor(struct device *dev, struct device_attribute *attr, char *buf)
791{
792 struct expansion_card *ec = ECARD_DEV(dev);
793 return sprintf(buf, "%u\n", ec->cid.manufacturer);
794}
795
796static ssize_t ecard_show_device(struct device *dev, struct device_attribute *attr, char *buf)
797{
798 struct expansion_card *ec = ECARD_DEV(dev);
799 return sprintf(buf, "%u\n", ec->cid.product);
800}
801
802static ssize_t ecard_show_type(struct device *dev, struct device_attribute *attr, char *buf)
803{
804 struct expansion_card *ec = ECARD_DEV(dev);
805 return sprintf(buf, "%s\n", ec->easi ? "EASI" : "IOC");
806}
807
808static struct device_attribute ecard_dev_attrs[] = {
809 __ATTR(device, S_IRUGO, ecard_show_device, NULL),
810 __ATTR(dma, S_IRUGO, ecard_show_dma, NULL),
811 __ATTR(irq, S_IRUGO, ecard_show_irq, NULL),
812 __ATTR(resource, S_IRUGO, ecard_show_resources, NULL),
813 __ATTR(type, S_IRUGO, ecard_show_type, NULL),
814 __ATTR(vendor, S_IRUGO, ecard_show_vendor, NULL),
815 __ATTR_NULL,
816};
817
818
819int ecard_request_resources(struct expansion_card *ec)
820{
821 int i, err = 0;
822
823 for (i = 0; i < ECARD_NUM_RESOURCES; i++) {
824 if (ecard_resource_end(ec, i) &&
825 !request_mem_region(ecard_resource_start(ec, i),
826 ecard_resource_len(ec, i),
827 ec->dev.driver->name)) {
828 err = -EBUSY;
829 break;
830 }
831 }
832
833 if (err) {
834 while (i--)
835 if (ecard_resource_end(ec, i))
836 release_mem_region(ecard_resource_start(ec, i),
837 ecard_resource_len(ec, i));
838 }
839 return err;
840}
841EXPORT_SYMBOL(ecard_request_resources);
842
843void ecard_release_resources(struct expansion_card *ec)
844{
845 int i;
846
847 for (i = 0; i < ECARD_NUM_RESOURCES; i++)
848 if (ecard_resource_end(ec, i))
849 release_mem_region(ecard_resource_start(ec, i),
850 ecard_resource_len(ec, i));
851}
852EXPORT_SYMBOL(ecard_release_resources);
853
854void ecard_setirq(struct expansion_card *ec, const struct expansion_card_ops *ops, void *irq_data)
855{
856 ec->irq_data = irq_data;
857 barrier();
858 ec->ops = ops;
859}
860EXPORT_SYMBOL(ecard_setirq);
861
862void __iomem *ecardm_iomap(struct expansion_card *ec, unsigned int res,
863 unsigned long offset, unsigned long maxsize)
864{
865 unsigned long start = ecard_resource_start(ec, res);
866 unsigned long end = ecard_resource_end(ec, res);
867
868 if (offset > (end - start))
869 return NULL;
870
871 start += offset;
872 if (maxsize && end - start > maxsize)
873 end = start + maxsize;
874
875 return devm_ioremap(&ec->dev, start, end - start);
876}
877EXPORT_SYMBOL(ecardm_iomap);
878
879/*
880 * Probe for an expansion card.
881 *
882 * If bit 1 of the first byte of the card is set, then the
883 * card does not exist.
884 */
885static int __init ecard_probe(int slot, unsigned irq, card_type_t type)
886{
887 ecard_t **ecp;
888 ecard_t *ec;
889 struct ex_ecid cid;
890 void __iomem *addr;
891 int i, rc;
892
893 ec = ecard_alloc_card(type, slot);
894 if (IS_ERR(ec)) {
895 rc = PTR_ERR(ec);
896 goto nomem;
897 }
898
899 rc = -ENODEV;
900 if ((addr = __ecard_address(ec, type, ECARD_SYNC)) == NULL)
901 goto nodev;
902
903 cid.r_zero = 1;
904 ecard_readbytes(&cid, ec, 0, 16, 0);
905 if (cid.r_zero)
906 goto nodev;
907
908 ec->cid.id = cid.r_id;
909 ec->cid.cd = cid.r_cd;
910 ec->cid.is = cid.r_is;
911 ec->cid.w = cid.r_w;
912 ec->cid.manufacturer = ecard_getu16(cid.r_manu);
913 ec->cid.product = ecard_getu16(cid.r_prod);
914 ec->cid.country = cid.r_country;
915 ec->cid.irqmask = cid.r_irqmask;
916 ec->cid.irqoff = ecard_gets24(cid.r_irqoff);
917 ec->cid.fiqmask = cid.r_fiqmask;
918 ec->cid.fiqoff = ecard_gets24(cid.r_fiqoff);
919 ec->fiqaddr =
920 ec->irqaddr = addr;
921
922 if (ec->cid.is) {
923 ec->irqmask = ec->cid.irqmask;
924 ec->irqaddr += ec->cid.irqoff;
925 ec->fiqmask = ec->cid.fiqmask;
926 ec->fiqaddr += ec->cid.fiqoff;
927 } else {
928 ec->irqmask = 1;
929 ec->fiqmask = 4;
930 }
931
932 for (i = 0; i < ARRAY_SIZE(blacklist); i++)
933 if (blacklist[i].manufacturer == ec->cid.manufacturer &&
934 blacklist[i].product == ec->cid.product) {
935 ec->card_desc = blacklist[i].type;
936 break;
937 }
938
939 ec->irq = irq;
940
941 /*
942 * hook the interrupt handlers
943 */
944 if (slot < 8) {
945 irq_set_chip_and_handler(ec->irq, &ecard_chip,
946 handle_level_irq);
947 irq_set_chip_data(ec->irq, ec);
948 set_irq_flags(ec->irq, IRQF_VALID);
949 }
950
951#ifdef CONFIG_ARCH_RPC
952 /* On RiscPC, only first two slots have DMA capability */
953 if (slot < 2)
954 ec->dma = 2 + slot;
955#endif
956
957 for (ecp = &cards; *ecp; ecp = &(*ecp)->next);
958
959 *ecp = ec;
960 slot_to_expcard[slot] = ec;
961
962 device_register(&ec->dev);
963
964 return 0;
965
966 nodev:
967 ecard_free_card(ec);
968 nomem:
969 return rc;
970}
971
972/*
973 * Initialise the expansion card system.
974 * Locate all hardware - interrupt management and
975 * actual cards.
976 */
977static int __init ecard_init(void)
978{
979 struct task_struct *task;
980 int slot, irqbase;
981
982 irqbase = irq_alloc_descs(-1, 0, 8, -1);
983 if (irqbase < 0)
984 return irqbase;
985
986 task = kthread_run(ecard_task, NULL, "kecardd");
987 if (IS_ERR(task)) {
988 printk(KERN_ERR "Ecard: unable to create kernel thread: %ld\n",
989 PTR_ERR(task));
990 irq_free_descs(irqbase, 8);
991 return PTR_ERR(task);
992 }
993
994 printk("Probing expansion cards\n");
995
996 for (slot = 0; slot < 8; slot ++) {
997 if (ecard_probe(slot, irqbase + slot, ECARD_EASI) == -ENODEV)
998 ecard_probe(slot, irqbase + slot, ECARD_IOC);
999 }
1000
1001 ecard_probe(8, 11, ECARD_IOC);
1002
1003 irq_set_chained_handler(IRQ_EXPANSIONCARD, ecard_irq_handler);
1004
1005 ecard_proc_init();
1006
1007 return 0;
1008}
1009
1010subsys_initcall(ecard_init);
1011
1012/*
1013 * ECARD "bus"
1014 */
1015static const struct ecard_id *
1016ecard_match_device(const struct ecard_id *ids, struct expansion_card *ec)
1017{
1018 int i;
1019
1020 for (i = 0; ids[i].manufacturer != 65535; i++)
1021 if (ec->cid.manufacturer == ids[i].manufacturer &&
1022 ec->cid.product == ids[i].product)
1023 return ids + i;
1024
1025 return NULL;
1026}
1027
1028static int ecard_drv_probe(struct device *dev)
1029{
1030 struct expansion_card *ec = ECARD_DEV(dev);
1031 struct ecard_driver *drv = ECARD_DRV(dev->driver);
1032 const struct ecard_id *id;
1033 int ret;
1034
1035 id = ecard_match_device(drv->id_table, ec);
1036
1037 ec->claimed = 1;
1038 ret = drv->probe(ec, id);
1039 if (ret)
1040 ec->claimed = 0;
1041 return ret;
1042}
1043
1044static int ecard_drv_remove(struct device *dev)
1045{
1046 struct expansion_card *ec = ECARD_DEV(dev);
1047 struct ecard_driver *drv = ECARD_DRV(dev->driver);
1048
1049 drv->remove(ec);
1050 ec->claimed = 0;
1051
1052 /*
1053 * Restore the default operations. We ensure that the
1054 * ops are set before we change the data.
1055 */
1056 ec->ops = &ecard_default_ops;
1057 barrier();
1058 ec->irq_data = NULL;
1059
1060 return 0;
1061}
1062
1063/*
1064 * Before rebooting, we must make sure that the expansion card is in a
1065 * sensible state, so it can be re-detected. This means that the first
1066 * page of the ROM must be visible. We call the expansion cards reset
1067 * handler, if any.
1068 */
1069static void ecard_drv_shutdown(struct device *dev)
1070{
1071 struct expansion_card *ec = ECARD_DEV(dev);
1072 struct ecard_driver *drv = ECARD_DRV(dev->driver);
1073 struct ecard_request req;
1074
1075 if (dev->driver) {
1076 if (drv->shutdown)
1077 drv->shutdown(ec);
1078 ec->claimed = 0;
1079 }
1080
1081 /*
1082 * If this card has a loader, call the reset handler.
1083 */
1084 if (ec->loader) {
1085 req.fn = ecard_task_reset;
1086 req.ec = ec;
1087 ecard_call(&req);
1088 }
1089}
1090
1091int ecard_register_driver(struct ecard_driver *drv)
1092{
1093 drv->drv.bus = &ecard_bus_type;
1094
1095 return driver_register(&drv->drv);
1096}
1097
1098void ecard_remove_driver(struct ecard_driver *drv)
1099{
1100 driver_unregister(&drv->drv);
1101}
1102
1103static int ecard_match(struct device *_dev, struct device_driver *_drv)
1104{
1105 struct expansion_card *ec = ECARD_DEV(_dev);
1106 struct ecard_driver *drv = ECARD_DRV(_drv);
1107 int ret;
1108
1109 if (drv->id_table) {
1110 ret = ecard_match_device(drv->id_table, ec) != NULL;
1111 } else {
1112 ret = ec->cid.id == drv->id;
1113 }
1114
1115 return ret;
1116}
1117
1118struct bus_type ecard_bus_type = {
1119 .name = "ecard",
1120 .dev_attrs = ecard_dev_attrs,
1121 .match = ecard_match,
1122 .probe = ecard_drv_probe,
1123 .remove = ecard_drv_remove,
1124 .shutdown = ecard_drv_shutdown,
1125};
1126
1127static int ecard_bus_init(void)
1128{
1129 return bus_register(&ecard_bus_type);
1130}
1131
1132postcore_initcall(ecard_bus_init);
1133
1134EXPORT_SYMBOL(ecard_readchunk);
1135EXPORT_SYMBOL(ecard_register_driver);
1136EXPORT_SYMBOL(ecard_remove_driver);
1137EXPORT_SYMBOL(ecard_bus_type);
diff --git a/arch/arm/mach-rpc/ecard.h b/arch/arm/mach-rpc/ecard.h
new file mode 100644
index 000000000000..4642d436be2a
--- /dev/null
+++ b/arch/arm/mach-rpc/ecard.h
@@ -0,0 +1,69 @@
1/*
2 * ecard.h
3 *
4 * Copyright 2007 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
11/* Definitions internal to ecard.c - for it's use only!!
12 *
13 * External expansion card header as read from the card
14 */
15struct ex_ecid {
16 unsigned char r_irq:1;
17 unsigned char r_zero:1;
18 unsigned char r_fiq:1;
19 unsigned char r_id:4;
20 unsigned char r_a:1;
21
22 unsigned char r_cd:1;
23 unsigned char r_is:1;
24 unsigned char r_w:2;
25 unsigned char r_r1:4;
26
27 unsigned char r_r2:8;
28
29 unsigned char r_prod[2];
30
31 unsigned char r_manu[2];
32
33 unsigned char r_country;
34
35 unsigned char r_fiqmask;
36 unsigned char r_fiqoff[3];
37
38 unsigned char r_irqmask;
39 unsigned char r_irqoff[3];
40};
41
42/*
43 * Chunk directory entry as read from the card
44 */
45struct ex_chunk_dir {
46 unsigned char r_id;
47 unsigned char r_len[3];
48 unsigned long r_start;
49 union {
50 char string[256];
51 char data[1];
52 } d;
53#define c_id(x) ((x)->r_id)
54#define c_len(x) ((x)->r_len[0]|((x)->r_len[1]<<8)|((x)->r_len[2]<<16))
55#define c_start(x) ((x)->r_start)
56};
57
58typedef enum ecard_type { /* Cards address space */
59 ECARD_IOC,
60 ECARD_MEMC,
61 ECARD_EASI
62} card_type_t;
63
64typedef enum { /* Speed for ECARD_IOC space */
65 ECARD_SLOW = 0,
66 ECARD_MEDIUM = 1,
67 ECARD_FAST = 2,
68 ECARD_SYNC = 3
69} card_speed_t;
diff --git a/arch/arm/mach-rpc/include/mach/irqs.h b/arch/arm/mach-rpc/include/mach/irqs.h
index 3d2037496e38..6868e178274d 100644
--- a/arch/arm/mach-rpc/include/mach/irqs.h
+++ b/arch/arm/mach-rpc/include/mach/irqs.h
@@ -42,6 +42,4 @@
42 */ 42 */
43#define FIQ_START 64 43#define FIQ_START 64
44 44
45#define IRQ_TIMER IRQ_TIMER0
46
47#define NR_IRQS 128 45#define NR_IRQS 128
diff --git a/arch/arm/mach-rpc/riscpc.c b/arch/arm/mach-rpc/riscpc.c
index 3d44a59fc0df..731552d68adf 100644
--- a/arch/arm/mach-rpc/riscpc.c
+++ b/arch/arm/mach-rpc/riscpc.c
@@ -98,15 +98,9 @@ static void __init rpc_map_io(void)
98} 98}
99 99
100static struct resource acornfb_resources[] = { 100static struct resource acornfb_resources[] = {
101 { /* VIDC */ 101 /* VIDC */
102 .start = 0x03400000, 102 DEFINE_RES_MEM(0x03400000, 0x00200000),
103 .end = 0x035fffff, 103 DEFINE_RES_IRQ(IRQ_VSYNCPULSE),
104 .flags = IORESOURCE_MEM,
105 }, {
106 .start = IRQ_VSYNCPULSE,
107 .end = IRQ_VSYNCPULSE,
108 .flags = IORESOURCE_IRQ,
109 },
110}; 104};
111 105
112static struct platform_device acornfb_device = { 106static struct platform_device acornfb_device = {
@@ -120,11 +114,7 @@ static struct platform_device acornfb_device = {
120}; 114};
121 115
122static struct resource iomd_resources[] = { 116static struct resource iomd_resources[] = {
123 { 117 DEFINE_RES_MEM(0x03200000, 0x10000),
124 .start = 0x03200000,
125 .end = 0x0320ffff,
126 .flags = IORESOURCE_MEM,
127 },
128}; 118};
129 119
130static struct platform_device iomd_device = { 120static struct platform_device iomd_device = {
@@ -134,18 +124,25 @@ static struct platform_device iomd_device = {
134 .resource = iomd_resources, 124 .resource = iomd_resources,
135}; 125};
136 126
127static struct resource iomd_kart_resources[] = {
128 DEFINE_RES_IRQ(IRQ_KEYBOARDRX),
129 DEFINE_RES_IRQ(IRQ_KEYBOARDTX),
130};
131
137static struct platform_device kbd_device = { 132static struct platform_device kbd_device = {
138 .name = "kart", 133 .name = "kart",
139 .id = -1, 134 .id = -1,
140 .dev = { 135 .dev = {
141 .parent = &iomd_device.dev, 136 .parent = &iomd_device.dev,
142 }, 137 },
138 .num_resources = ARRAY_SIZE(iomd_kart_resources),
139 .resource = iomd_kart_resources,
143}; 140};
144 141
145static struct plat_serial8250_port serial_platform_data[] = { 142static struct plat_serial8250_port serial_platform_data[] = {
146 { 143 {
147 .mapbase = 0x03010fe0, 144 .mapbase = 0x03010fe0,
148 .irq = 10, 145 .irq = IRQ_SERIALPORT,
149 .uartclk = 1843200, 146 .uartclk = 1843200,
150 .regshift = 2, 147 .regshift = 2,
151 .iotype = UPIO_MEM, 148 .iotype = UPIO_MEM,
@@ -167,21 +164,9 @@ static struct pata_platform_info pata_platform_data = {
167}; 164};
168 165
169static struct resource pata_resources[] = { 166static struct resource pata_resources[] = {
170 [0] = { 167 DEFINE_RES_MEM(0x030107c0, 0x20),
171 .start = 0x030107c0, 168 DEFINE_RES_MEM(0x03010fd8, 0x04),
172 .end = 0x030107df, 169 DEFINE_RES_IRQ(IRQ_HARDDISK),
173 .flags = IORESOURCE_MEM,
174 },
175 [1] = {
176 .start = 0x03010fd8,
177 .end = 0x03010fdb,
178 .flags = IORESOURCE_MEM,
179 },
180 [2] = {
181 .start = IRQ_HARDDISK,
182 .end = IRQ_HARDDISK,
183 .flags = IORESOURCE_IRQ,
184 },
185}; 170};
186 171
187static struct platform_device pata_device = { 172static struct platform_device pata_device = {
diff --git a/arch/arm/mach-rpc/time.c b/arch/arm/mach-rpc/time.c
new file mode 100644
index 000000000000..581fca934bb3
--- /dev/null
+++ b/arch/arm/mach-rpc/time.c
@@ -0,0 +1,95 @@
1/*
2 * linux/arch/arm/common/time-acorn.c
3 *
4 * Copyright (c) 1996-2000 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 * Changelog:
11 * 24-Sep-1996 RMK Created
12 * 10-Oct-1996 RMK Brought up to date with arch-sa110eval
13 * 04-Dec-1997 RMK Updated for new arch/arm/time.c
14 * 13=Jun-2004 DS Moved to arch/arm/common b/c shared w/CLPS7500
15 */
16#include <linux/timex.h>
17#include <linux/init.h>
18#include <linux/interrupt.h>
19#include <linux/irq.h>
20#include <linux/io.h>
21
22#include <mach/hardware.h>
23#include <asm/hardware/ioc.h>
24
25#include <asm/mach/time.h>
26
27unsigned long ioc_timer_gettimeoffset(void)
28{
29 unsigned int count1, count2, status;
30 long offset;
31
32 ioc_writeb (0, IOC_T0LATCH);
33 barrier ();
34 count1 = ioc_readb(IOC_T0CNTL) | (ioc_readb(IOC_T0CNTH) << 8);
35 barrier ();
36 status = ioc_readb(IOC_IRQREQA);
37 barrier ();
38 ioc_writeb (0, IOC_T0LATCH);
39 barrier ();
40 count2 = ioc_readb(IOC_T0CNTL) | (ioc_readb(IOC_T0CNTH) << 8);
41
42 offset = count2;
43 if (count2 < count1) {
44 /*
45 * We have not had an interrupt between reading count1
46 * and count2.
47 */
48 if (status & (1 << 5))
49 offset -= LATCH;
50 } else if (count2 > count1) {
51 /*
52 * We have just had another interrupt between reading
53 * count1 and count2.
54 */
55 offset -= LATCH;
56 }
57
58 offset = (LATCH - offset) * (tick_nsec / 1000);
59 return (offset + LATCH/2) / LATCH;
60}
61
62void __init ioctime_init(void)
63{
64 ioc_writeb(LATCH & 255, IOC_T0LTCHL);
65 ioc_writeb(LATCH >> 8, IOC_T0LTCHH);
66 ioc_writeb(0, IOC_T0GO);
67}
68
69static irqreturn_t
70ioc_timer_interrupt(int irq, void *dev_id)
71{
72 timer_tick();
73 return IRQ_HANDLED;
74}
75
76static struct irqaction ioc_timer_irq = {
77 .name = "timer",
78 .flags = IRQF_DISABLED,
79 .handler = ioc_timer_interrupt
80};
81
82/*
83 * Set up timer interrupt.
84 */
85static void __init ioc_timer_init(void)
86{
87 ioctime_init();
88 setup_irq(IRQ_TIMER0, &ioc_timer_irq);
89}
90
91struct sys_timer ioc_timer = {
92 .init = ioc_timer_init,
93 .offset = ioc_timer_gettimeoffset,
94};
95
generated by cgit v1.2.2 (git 2.25.0) at 2025-01-13 21:43:04 -0500