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authorLinus Torvalds <torvalds@linux-foundation.org>2012-03-27 21:17:02 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2012-03-27 21:17:02 -0400
commit9e4db1c3eed55c22328d8022c2c80adb3093833f (patch)
tree9643545e6bd182f1d3e19942f590a6a1e3198320 /arch/arm/kernel
parentde8856d2c11f562c60ed9340a83db4a4f829a6e6 (diff)
parentaae528d9a8ad79d4b21b1b723abc9447fdb0d200 (diff)
Merge branch 'platforms' of git://git.linaro.org/people/rmk/linux-arm
Pull ARM platform updates from Russell King: "This covers platform stuff for platforms I have a direct interest in (iow, I have the hardware). Essentially: - as we no longer support any other Acorn platforms other than RiscPC anymore, we can collect all that code into mach-rpc. - convert Acorn expansion card stuff to use IRQ allocation functions, and get rid of NO_IRQ from there. - cleanups to the ebsa110 platform to move some private stuff out of its header files. - large amount of SA11x0 updates: - conversion of private DMA implementation to DMA engine support (this actually gives us greater flexibility in drivers over the old API.) - re-worked ucb1x00 updates - convert to genirq, remove sa11x0 dependencies, fix various minor issues - move platform specific sa11x0 framebuffer data into platform files in arch/arm instead of keeping this in the driver itself - update sa11x0 IrDA driver for DMA engine, and allow it to use DMA for SIR transmissions as well as FIR - rework sa1111 support for genirq, and irq allocation - fix sa1111 IRQ support so it works again - use sparse IRQ support After this, I have one more pull request remaining from my current set, which I think is going to be the most problematical as it generates 8 conflicts." Fixed up the trivial conflict in arch/arm/mach-rpc/Makefile as per Russell. * 'platforms' of git://git.linaro.org/people/rmk/linux-arm: (125 commits) ARM: 7343/1: sa11x0: convert to sparse IRQ ARM: 7342/2: sa1100: prepare for sparse irq conversion ARM: 7341/1: input: prepare jornada720 keyboard and ts for sa11x0 sparse irq ARM: 7340/1: rtc: sa1100: include mach/irqs.h instead of asm/irq.h ARM: sa11x0: remove unused DMA controller definitions ARM: sa11x0: remove old SoC private DMA driver USB: sa1111: add hcd .reset method USB: sa1111: add OHCI shutdown methods USB: sa1111: reorganize ohci-sa1111.c USB: sa1111: get rid of nasty printk(KERN_DEBUG "%s: ...", __FILE__) USB: sa1111: sparse and checkpatch cleanups ARM: sa11x0: don't static map sa1111 ARM: sa1111: use dev_err() rather than printk() ARM: sa1111: cleanup sub-device registration and unregistration ARM: sa1111: only setup DMA for DMA capable devices ARM: sa1111: register sa1111 devices with dmabounce in bus notifier ARM: sa1111: move USB interface register definitions to ohci-sa1111.c ARM: sa1111: move PCMCIA interface register definitions to sa1111_generic.c ARM: sa1111: move PS/2 interface register definitions to sa1111p2.c ARM: sa1111: delete unused physical GPIO register definitions ...
Diffstat (limited to 'arch/arm/kernel')
-rw-r--r--arch/arm/kernel/Makefile1
-rw-r--r--arch/arm/kernel/ecard.c1232
-rw-r--r--arch/arm/kernel/ecard.h69
3 files changed, 0 insertions, 1302 deletions
diff --git a/arch/arm/kernel/Makefile b/arch/arm/kernel/Makefile
index f16d7652f34b..3a274878412e 100644
--- a/arch/arm/kernel/Makefile
+++ b/arch/arm/kernel/Makefile
@@ -23,7 +23,6 @@ obj-$(CONFIG_LEDS) += leds.o
23obj-$(CONFIG_OC_ETM) += etm.o 23obj-$(CONFIG_OC_ETM) += etm.o
24 24
25obj-$(CONFIG_ISA_DMA_API) += dma.o 25obj-$(CONFIG_ISA_DMA_API) += dma.o
26obj-$(CONFIG_ARCH_ACORN) += ecard.o
27obj-$(CONFIG_FIQ) += fiq.o fiqasm.o 26obj-$(CONFIG_FIQ) += fiq.o fiqasm.o
28obj-$(CONFIG_MODULES) += armksyms.o module.o 27obj-$(CONFIG_MODULES) += armksyms.o module.o
29obj-$(CONFIG_ARTHUR) += arthur.o 28obj-$(CONFIG_ARTHUR) += arthur.o
diff --git a/arch/arm/kernel/ecard.c b/arch/arm/kernel/ecard.c
deleted file mode 100644
index 1651d4950744..000000000000
--- a/arch/arm/kernel/ecard.c
+++ /dev/null
@@ -1,1232 +0,0 @@
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 <mach/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
61struct 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
71struct expcard_blacklist {
72 unsigned short manufacturer;
73 unsigned short product;
74 const char *type;
75};
76
77static ecard_t *cards;
78static ecard_t *slot_to_expcard[MAX_ECARDS];
79static unsigned int ectcr;
80#ifdef HAS_EXPMASK
81static 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 */
87static struct expcard_blacklist __initdata blacklist[] = {
88 { MANU_ACORN, PROD_ACORN_ETHER1, "Acorn Ether1" }
89};
90
91asmlinkage extern int
92ecard_loader_reset(unsigned long base, loader_t loader);
93asmlinkage extern int
94ecard_loader_read(int off, unsigned long base, loader_t loader);
95
96static inline unsigned short ecard_getu16(unsigned char *v)
97{
98 return v[0] | v[1] << 8;
99}
100
101static 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
106static 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 */
123static 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
137static 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
211static DECLARE_WAIT_QUEUE_HEAD(ecard_wait);
212static struct ecard_request *ecard_req;
213static DEFINE_MUTEX(ecard_mutex);
214
215/*
216 * Set up the expansion card daemon's page tables.
217 */
218static 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, (unsigned long)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_flags = VM_EXEC;
246 vma.vm_mm = mm;
247
248 flush_tlb_range(&vma, IO_START, IO_START + IO_SIZE);
249 flush_tlb_range(&vma, EASI_START, EASI_START + EASI_SIZE);
250}
251
252static int ecard_init_mm(void)
253{
254 struct mm_struct * mm = mm_alloc();
255 struct mm_struct *active_mm = current->active_mm;
256
257 if (!mm)
258 return -ENOMEM;
259
260 current->mm = mm;
261 current->active_mm = mm;
262 activate_mm(active_mm, mm);
263 mmdrop(active_mm);
264 ecard_init_pgtables(mm);
265 return 0;
266}
267
268static int
269ecard_task(void * unused)
270{
271 /*
272 * Allocate a mm. We're not a lazy-TLB kernel task since we need
273 * to set page table entries where the user space would be. Note
274 * that this also creates the page tables. Failure is not an
275 * option here.
276 */
277 if (ecard_init_mm())
278 panic("kecardd: unable to alloc mm\n");
279
280 while (1) {
281 struct ecard_request *req;
282
283 wait_event_interruptible(ecard_wait, ecard_req != NULL);
284
285 req = xchg(&ecard_req, NULL);
286 if (req != NULL) {
287 req->fn(req);
288 complete(req->complete);
289 }
290 }
291}
292
293/*
294 * Wake the expansion card daemon to action our request.
295 *
296 * FIXME: The test here is not sufficient to detect if the
297 * kcardd is running.
298 */
299static void ecard_call(struct ecard_request *req)
300{
301 DECLARE_COMPLETION_ONSTACK(completion);
302
303 req->complete = &completion;
304
305 mutex_lock(&ecard_mutex);
306 ecard_req = req;
307 wake_up(&ecard_wait);
308
309 /*
310 * Now wait for kecardd to run.
311 */
312 wait_for_completion(&completion);
313 mutex_unlock(&ecard_mutex);
314}
315
316/* ======================= Mid-level card control ===================== */
317
318static void
319ecard_readbytes(void *addr, ecard_t *ec, int off, int len, int useld)
320{
321 struct ecard_request req;
322
323 req.fn = ecard_task_readbytes;
324 req.ec = ec;
325 req.address = off;
326 req.length = len;
327 req.use_loader = useld;
328 req.buffer = addr;
329
330 ecard_call(&req);
331}
332
333int ecard_readchunk(struct in_chunk_dir *cd, ecard_t *ec, int id, int num)
334{
335 struct ex_chunk_dir excd;
336 int index = 16;
337 int useld = 0;
338
339 if (!ec->cid.cd)
340 return 0;
341
342 while(1) {
343 ecard_readbytes(&excd, ec, index, 8, useld);
344 index += 8;
345 if (c_id(&excd) == 0) {
346 if (!useld && ec->loader) {
347 useld = 1;
348 index = 0;
349 continue;
350 }
351 return 0;
352 }
353 if (c_id(&excd) == 0xf0) { /* link */
354 index = c_start(&excd);
355 continue;
356 }
357 if (c_id(&excd) == 0x80) { /* loader */
358 if (!ec->loader) {
359 ec->loader = kmalloc(c_len(&excd),
360 GFP_KERNEL);
361 if (ec->loader)
362 ecard_readbytes(ec->loader, ec,
363 (int)c_start(&excd),
364 c_len(&excd), useld);
365 else
366 return 0;
367 }
368 continue;
369 }
370 if (c_id(&excd) == id && num-- == 0)
371 break;
372 }
373
374 if (c_id(&excd) & 0x80) {
375 switch (c_id(&excd) & 0x70) {
376 case 0x70:
377 ecard_readbytes((unsigned char *)excd.d.string, ec,
378 (int)c_start(&excd), c_len(&excd),
379 useld);
380 break;
381 case 0x00:
382 break;
383 }
384 }
385 cd->start_offset = c_start(&excd);
386 memcpy(cd->d.string, excd.d.string, 256);
387 return 1;
388}
389
390/* ======================= Interrupt control ============================ */
391
392static void ecard_def_irq_enable(ecard_t *ec, int irqnr)
393{
394#ifdef HAS_EXPMASK
395 if (irqnr < 4 && have_expmask) {
396 have_expmask |= 1 << irqnr;
397 __raw_writeb(have_expmask, EXPMASK_ENABLE);
398 }
399#endif
400}
401
402static void ecard_def_irq_disable(ecard_t *ec, int irqnr)
403{
404#ifdef HAS_EXPMASK
405 if (irqnr < 4 && have_expmask) {
406 have_expmask &= ~(1 << irqnr);
407 __raw_writeb(have_expmask, EXPMASK_ENABLE);
408 }
409#endif
410}
411
412static int ecard_def_irq_pending(ecard_t *ec)
413{
414 return !ec->irqmask || readb(ec->irqaddr) & ec->irqmask;
415}
416
417static void ecard_def_fiq_enable(ecard_t *ec, int fiqnr)
418{
419 panic("ecard_def_fiq_enable called - impossible");
420}
421
422static void ecard_def_fiq_disable(ecard_t *ec, int fiqnr)
423{
424 panic("ecard_def_fiq_disable called - impossible");
425}
426
427static int ecard_def_fiq_pending(ecard_t *ec)
428{
429 return !ec->fiqmask || readb(ec->fiqaddr) & ec->fiqmask;
430}
431
432static expansioncard_ops_t ecard_default_ops = {
433 ecard_def_irq_enable,
434 ecard_def_irq_disable,
435 ecard_def_irq_pending,
436 ecard_def_fiq_enable,
437 ecard_def_fiq_disable,
438 ecard_def_fiq_pending
439};
440
441/*
442 * Enable and disable interrupts from expansion cards.
443 * (interrupts are disabled for these functions).
444 *
445 * They are not meant to be called directly, but via enable/disable_irq.
446 */
447static void ecard_irq_unmask(struct irq_data *d)
448{
449 ecard_t *ec = slot_to_ecard(d->irq - 32);
450
451 if (ec) {
452 if (!ec->ops)
453 ec->ops = &ecard_default_ops;
454
455 if (ec->claimed && ec->ops->irqenable)
456 ec->ops->irqenable(ec, d->irq);
457 else
458 printk(KERN_ERR "ecard: rejecting request to "
459 "enable IRQs for %d\n", d->irq);
460 }
461}
462
463static void ecard_irq_mask(struct irq_data *d)
464{
465 ecard_t *ec = slot_to_ecard(d->irq - 32);
466
467 if (ec) {
468 if (!ec->ops)
469 ec->ops = &ecard_default_ops;
470
471 if (ec->ops && ec->ops->irqdisable)
472 ec->ops->irqdisable(ec, d->irq);
473 }
474}
475
476static struct irq_chip ecard_chip = {
477 .name = "ECARD",
478 .irq_ack = ecard_irq_mask,
479 .irq_mask = ecard_irq_mask,
480 .irq_unmask = ecard_irq_unmask,
481};
482
483void ecard_enablefiq(unsigned int fiqnr)
484{
485 ecard_t *ec = slot_to_ecard(fiqnr);
486
487 if (ec) {
488 if (!ec->ops)
489 ec->ops = &ecard_default_ops;
490
491 if (ec->claimed && ec->ops->fiqenable)
492 ec->ops->fiqenable(ec, fiqnr);
493 else
494 printk(KERN_ERR "ecard: rejecting request to "
495 "enable FIQs for %d\n", fiqnr);
496 }
497}
498
499void ecard_disablefiq(unsigned int fiqnr)
500{
501 ecard_t *ec = slot_to_ecard(fiqnr);
502
503 if (ec) {
504 if (!ec->ops)
505 ec->ops = &ecard_default_ops;
506
507 if (ec->ops->fiqdisable)
508 ec->ops->fiqdisable(ec, fiqnr);
509 }
510}
511
512static void ecard_dump_irq_state(void)
513{
514 ecard_t *ec;
515
516 printk("Expansion card IRQ state:\n");
517
518 for (ec = cards; ec; ec = ec->next) {
519 if (ec->slot_no == 8)
520 continue;
521
522 printk(" %d: %sclaimed, ",
523 ec->slot_no, ec->claimed ? "" : "not ");
524
525 if (ec->ops && ec->ops->irqpending &&
526 ec->ops != &ecard_default_ops)
527 printk("irq %spending\n",
528 ec->ops->irqpending(ec) ? "" : "not ");
529 else
530 printk("irqaddr %p, mask = %02X, status = %02X\n",
531 ec->irqaddr, ec->irqmask, readb(ec->irqaddr));
532 }
533}
534
535static void ecard_check_lockup(struct irq_desc *desc)
536{
537 static unsigned long last;
538 static int lockup;
539
540 /*
541 * If the timer interrupt has not run since the last million
542 * unrecognised expansion card interrupts, then there is
543 * something seriously wrong. Disable the expansion card
544 * interrupts so at least we can continue.
545 *
546 * Maybe we ought to start a timer to re-enable them some time
547 * later?
548 */
549 if (last == jiffies) {
550 lockup += 1;
551 if (lockup > 1000000) {
552 printk(KERN_ERR "\nInterrupt lockup detected - "
553 "disabling all expansion card interrupts\n");
554
555 desc->irq_data.chip->irq_mask(&desc->irq_data);
556 ecard_dump_irq_state();
557 }
558 } else
559 lockup = 0;
560
561 /*
562 * If we did not recognise the source of this interrupt,
563 * warn the user, but don't flood the user with these messages.
564 */
565 if (!last || time_after(jiffies, last + 5*HZ)) {
566 last = jiffies;
567 printk(KERN_WARNING "Unrecognised interrupt from backplane\n");
568 ecard_dump_irq_state();
569 }
570}
571
572static void
573ecard_irq_handler(unsigned int irq, struct irq_desc *desc)
574{
575 ecard_t *ec;
576 int called = 0;
577
578 desc->irq_data.chip->irq_mask(&desc->irq_data);
579 for (ec = cards; ec; ec = ec->next) {
580 int pending;
581
582 if (!ec->claimed || ec->irq == NO_IRQ || ec->slot_no == 8)
583 continue;
584
585 if (ec->ops && ec->ops->irqpending)
586 pending = ec->ops->irqpending(ec);
587 else
588 pending = ecard_default_ops.irqpending(ec);
589
590 if (pending) {
591 generic_handle_irq(ec->irq);
592 called ++;
593 }
594 }
595 desc->irq_data.chip->irq_unmask(&desc->irq_data);
596
597 if (called == 0)
598 ecard_check_lockup(desc);
599}
600
601#ifdef HAS_EXPMASK
602static unsigned char priority_masks[] =
603{
604 0xf0, 0xf1, 0xf3, 0xf7, 0xff, 0xff, 0xff, 0xff
605};
606
607static 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
613static void
614ecard_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 /*
626 * this ugly code is so that we can operate a
627 * prioritorising system:
628 *
629 * Card 0 highest priority
630 * Card 1
631 * Card 2
632 * Card 3 lowest priority
633 *
634 * Serial cards should go in 0/1, ethernet/scsi in 2/3
635 * otherwise you will lose serial data at high speeds!
636 */
637 generic_handle_irq(ec->irq);
638 } else {
639 printk(KERN_WARNING "card%d: interrupt from unclaimed "
640 "card???\n", slot);
641 have_expmask &= ~(1 << slot);
642 __raw_writeb(have_expmask, EXPMASK_ENABLE);
643 }
644 } else
645 printk(KERN_WARNING "Wild interrupt from backplane (masks)\n");
646}
647
648static int __init ecard_probeirqhw(void)
649{
650 ecard_t *ec;
651 int found;
652
653 __raw_writeb(0x00, EXPMASK_ENABLE);
654 __raw_writeb(0xff, EXPMASK_STATUS);
655 found = (__raw_readb(EXPMASK_STATUS) & 15) == 0;
656 __raw_writeb(0xff, EXPMASK_ENABLE);
657
658 if (found) {
659 printk(KERN_DEBUG "Expansion card interrupt "
660 "management hardware found\n");
661
662 /* for each card present, set a bit to '1' */
663 have_expmask = 0x80000000;
664
665 for (ec = cards; ec; ec = ec->next)
666 have_expmask |= 1 << ec->slot_no;
667
668 __raw_writeb(have_expmask, EXPMASK_ENABLE);
669 }
670
671 return found;
672}
673#else
674#define ecard_irqexp_handler NULL
675#define ecard_probeirqhw() (0)
676#endif
677
678static void __iomem *__ecard_address(ecard_t *ec, card_type_t type, card_speed_t speed)
679{
680 void __iomem *address = NULL;
681 int slot = ec->slot_no;
682
683 if (ec->slot_no == 8)
684 return ECARD_MEMC8_BASE;
685
686 ectcr &= ~(1 << slot);
687
688 switch (type) {
689 case ECARD_MEMC:
690 if (slot < 4)
691 address = ECARD_MEMC_BASE + (slot << 14);
692 break;
693
694 case ECARD_IOC:
695 if (slot < 4)
696 address = ECARD_IOC_BASE + (slot << 14);
697 else
698 address = ECARD_IOC4_BASE + ((slot - 4) << 14);
699 if (address)
700 address += speed << 19;
701 break;
702
703 case ECARD_EASI:
704 address = ECARD_EASI_BASE + (slot << 24);
705 if (speed == ECARD_FAST)
706 ectcr |= 1 << slot;
707 break;
708
709 default:
710 break;
711 }
712
713#ifdef IOMD_ECTCR
714 iomd_writeb(ectcr, IOMD_ECTCR);
715#endif
716 return address;
717}
718
719static int ecard_prints(struct seq_file *m, ecard_t *ec)
720{
721 seq_printf(m, " %d: %s ", ec->slot_no, ec->easi ? "EASI" : " ");
722
723 if (ec->cid.id == 0) {
724 struct in_chunk_dir incd;
725
726 seq_printf(m, "[%04X:%04X] ",
727 ec->cid.manufacturer, ec->cid.product);
728
729 if (!ec->card_desc && ec->cid.cd &&
730 ecard_readchunk(&incd, ec, 0xf5, 0)) {
731 ec->card_desc = kmalloc(strlen(incd.d.string)+1, GFP_KERNEL);
732
733 if (ec->card_desc)
734 strcpy((char *)ec->card_desc, incd.d.string);
735 }
736
737 seq_printf(m, "%s\n", ec->card_desc ? ec->card_desc : "*unknown*");
738 } else
739 seq_printf(m, "Simple card %d\n", ec->cid.id);
740
741 return 0;
742}
743
744static int ecard_devices_proc_show(struct seq_file *m, void *v)
745{
746 ecard_t *ec = cards;
747
748 while (ec) {
749 ecard_prints(m, ec);
750 ec = ec->next;
751 }
752 return 0;
753}
754
755static int ecard_devices_proc_open(struct inode *inode, struct file *file)
756{
757 return single_open(file, ecard_devices_proc_show, NULL);
758}
759
760static const struct file_operations bus_ecard_proc_fops = {
761 .owner = THIS_MODULE,
762 .open = ecard_devices_proc_open,
763 .read = seq_read,
764 .llseek = seq_lseek,
765 .release = single_release,
766};
767
768static struct proc_dir_entry *proc_bus_ecard_dir = NULL;
769
770static void ecard_proc_init(void)
771{
772 proc_bus_ecard_dir = proc_mkdir("bus/ecard", NULL);
773 proc_create("devices", 0, proc_bus_ecard_dir, &bus_ecard_proc_fops);
774}
775
776#define ec_set_resource(ec,nr,st,sz) \
777 do { \
778 (ec)->resource[nr].name = dev_name(&ec->dev); \
779 (ec)->resource[nr].start = st; \
780 (ec)->resource[nr].end = (st) + (sz) - 1; \
781 (ec)->resource[nr].flags = IORESOURCE_MEM; \
782 } while (0)
783
784static void __init ecard_free_card(struct expansion_card *ec)
785{
786 int i;
787
788 for (i = 0; i < ECARD_NUM_RESOURCES; i++)
789 if (ec->resource[i].flags)
790 release_resource(&ec->resource[i]);
791
792 kfree(ec);
793}
794
795static struct expansion_card *__init ecard_alloc_card(int type, int slot)
796{
797 struct expansion_card *ec;
798 unsigned long base;
799 int i;
800
801 ec = kzalloc(sizeof(ecard_t), GFP_KERNEL);
802 if (!ec) {
803 ec = ERR_PTR(-ENOMEM);
804 goto nomem;
805 }
806
807 ec->slot_no = slot;
808 ec->easi = type == ECARD_EASI;
809 ec->irq = NO_IRQ;
810 ec->fiq = NO_IRQ;
811 ec->dma = NO_DMA;
812 ec->ops = &ecard_default_ops;
813
814 dev_set_name(&ec->dev, "ecard%d", slot);
815 ec->dev.parent = NULL;
816 ec->dev.bus = &ecard_bus_type;
817 ec->dev.dma_mask = &ec->dma_mask;
818 ec->dma_mask = (u64)0xffffffff;
819 ec->dev.coherent_dma_mask = ec->dma_mask;
820
821 if (slot < 4) {
822 ec_set_resource(ec, ECARD_RES_MEMC,
823 PODSLOT_MEMC_BASE + (slot << 14),
824 PODSLOT_MEMC_SIZE);
825 base = PODSLOT_IOC0_BASE + (slot << 14);
826 } else
827 base = PODSLOT_IOC4_BASE + ((slot - 4) << 14);
828
829#ifdef CONFIG_ARCH_RPC
830 if (slot < 8) {
831 ec_set_resource(ec, ECARD_RES_EASI,
832 PODSLOT_EASI_BASE + (slot << 24),
833 PODSLOT_EASI_SIZE);
834 }
835
836 if (slot == 8) {
837 ec_set_resource(ec, ECARD_RES_MEMC, NETSLOT_BASE, NETSLOT_SIZE);
838 } else
839#endif
840
841 for (i = 0; i <= ECARD_RES_IOCSYNC - ECARD_RES_IOCSLOW; i++)
842 ec_set_resource(ec, i + ECARD_RES_IOCSLOW,
843 base + (i << 19), PODSLOT_IOC_SIZE);
844
845 for (i = 0; i < ECARD_NUM_RESOURCES; i++) {
846 if (ec->resource[i].flags &&
847 request_resource(&iomem_resource, &ec->resource[i])) {
848 dev_err(&ec->dev, "resource(s) not available\n");
849 ec->resource[i].end -= ec->resource[i].start;
850 ec->resource[i].start = 0;
851 ec->resource[i].flags = 0;
852 }
853 }
854
855 nomem:
856 return ec;
857}
858
859static ssize_t ecard_show_irq(struct device *dev, struct device_attribute *attr, char *buf)
860{
861 struct expansion_card *ec = ECARD_DEV(dev);
862 return sprintf(buf, "%u\n", ec->irq);
863}
864
865static ssize_t ecard_show_dma(struct device *dev, struct device_attribute *attr, char *buf)
866{
867 struct expansion_card *ec = ECARD_DEV(dev);
868 return sprintf(buf, "%u\n", ec->dma);
869}
870
871static ssize_t ecard_show_resources(struct device *dev, struct device_attribute *attr, char *buf)
872{
873 struct expansion_card *ec = ECARD_DEV(dev);
874 char *str = buf;
875 int i;
876
877 for (i = 0; i < ECARD_NUM_RESOURCES; i++)
878 str += sprintf(str, "%08x %08x %08lx\n",
879 ec->resource[i].start,
880 ec->resource[i].end,
881 ec->resource[i].flags);
882
883 return str - buf;
884}
885
886static ssize_t ecard_show_vendor(struct device *dev, struct device_attribute *attr, char *buf)
887{
888 struct expansion_card *ec = ECARD_DEV(dev);
889 return sprintf(buf, "%u\n", ec->cid.manufacturer);
890}
891
892static ssize_t ecard_show_device(struct device *dev, struct device_attribute *attr, char *buf)
893{
894 struct expansion_card *ec = ECARD_DEV(dev);
895 return sprintf(buf, "%u\n", ec->cid.product);
896}
897
898static ssize_t ecard_show_type(struct device *dev, struct device_attribute *attr, char *buf)
899{
900 struct expansion_card *ec = ECARD_DEV(dev);
901 return sprintf(buf, "%s\n", ec->easi ? "EASI" : "IOC");
902}
903
904static struct device_attribute ecard_dev_attrs[] = {
905 __ATTR(device, S_IRUGO, ecard_show_device, NULL),
906 __ATTR(dma, S_IRUGO, ecard_show_dma, NULL),
907 __ATTR(irq, S_IRUGO, ecard_show_irq, NULL),
908 __ATTR(resource, S_IRUGO, ecard_show_resources, NULL),
909 __ATTR(type, S_IRUGO, ecard_show_type, NULL),
910 __ATTR(vendor, S_IRUGO, ecard_show_vendor, NULL),
911 __ATTR_NULL,
912};
913
914
915int ecard_request_resources(struct expansion_card *ec)
916{
917 int i, err = 0;
918
919 for (i = 0; i < ECARD_NUM_RESOURCES; i++) {
920 if (ecard_resource_end(ec, i) &&
921 !request_mem_region(ecard_resource_start(ec, i),
922 ecard_resource_len(ec, i),
923 ec->dev.driver->name)) {
924 err = -EBUSY;
925 break;
926 }
927 }
928
929 if (err) {
930 while (i--)
931 if (ecard_resource_end(ec, i))
932 release_mem_region(ecard_resource_start(ec, i),
933 ecard_resource_len(ec, i));
934 }
935 return err;
936}
937EXPORT_SYMBOL(ecard_request_resources);
938
939void ecard_release_resources(struct expansion_card *ec)
940{
941 int i;
942
943 for (i = 0; i < ECARD_NUM_RESOURCES; i++)
944 if (ecard_resource_end(ec, i))
945 release_mem_region(ecard_resource_start(ec, i),
946 ecard_resource_len(ec, i));
947}
948EXPORT_SYMBOL(ecard_release_resources);
949
950void ecard_setirq(struct expansion_card *ec, const struct expansion_card_ops *ops, void *irq_data)
951{
952 ec->irq_data = irq_data;
953 barrier();
954 ec->ops = ops;
955}
956EXPORT_SYMBOL(ecard_setirq);
957
958void __iomem *ecardm_iomap(struct expansion_card *ec, unsigned int res,
959 unsigned long offset, unsigned long maxsize)
960{
961 unsigned long start = ecard_resource_start(ec, res);
962 unsigned long end = ecard_resource_end(ec, res);
963
964 if (offset > (end - start))
965 return NULL;
966
967 start += offset;
968 if (maxsize && end - start > maxsize)
969 end = start + maxsize;
970
971 return devm_ioremap(&ec->dev, start, end - start);
972}
973EXPORT_SYMBOL(ecardm_iomap);
974
975/*
976 * Probe for an expansion card.
977 *
978 * If bit 1 of the first byte of the card is set, then the
979 * card does not exist.
980 */
981static int __init
982ecard_probe(int slot, card_type_t type)
983{
984 ecard_t **ecp;
985 ecard_t *ec;
986 struct ex_ecid cid;
987 void __iomem *addr;
988 int i, rc;
989
990 ec = ecard_alloc_card(type, slot);
991 if (IS_ERR(ec)) {
992 rc = PTR_ERR(ec);
993 goto nomem;
994 }
995
996 rc = -ENODEV;
997 if ((addr = __ecard_address(ec, type, ECARD_SYNC)) == NULL)
998 goto nodev;
999
1000 cid.r_zero = 1;
1001 ecard_readbytes(&cid, ec, 0, 16, 0);
1002 if (cid.r_zero)
1003 goto nodev;
1004
1005 ec->cid.id = cid.r_id;
1006 ec->cid.cd = cid.r_cd;
1007 ec->cid.is = cid.r_is;
1008 ec->cid.w = cid.r_w;
1009 ec->cid.manufacturer = ecard_getu16(cid.r_manu);
1010 ec->cid.product = ecard_getu16(cid.r_prod);
1011 ec->cid.country = cid.r_country;
1012 ec->cid.irqmask = cid.r_irqmask;
1013 ec->cid.irqoff = ecard_gets24(cid.r_irqoff);
1014 ec->cid.fiqmask = cid.r_fiqmask;
1015 ec->cid.fiqoff = ecard_gets24(cid.r_fiqoff);
1016 ec->fiqaddr =
1017 ec->irqaddr = addr;
1018
1019 if (ec->cid.is) {
1020 ec->irqmask = ec->cid.irqmask;
1021 ec->irqaddr += ec->cid.irqoff;
1022 ec->fiqmask = ec->cid.fiqmask;
1023 ec->fiqaddr += ec->cid.fiqoff;
1024 } else {
1025 ec->irqmask = 1;
1026 ec->fiqmask = 4;
1027 }
1028
1029 for (i = 0; i < ARRAY_SIZE(blacklist); i++)
1030 if (blacklist[i].manufacturer == ec->cid.manufacturer &&
1031 blacklist[i].product == ec->cid.product) {
1032 ec->card_desc = blacklist[i].type;
1033 break;
1034 }
1035
1036 /*
1037 * hook the interrupt handlers
1038 */
1039 if (slot < 8) {
1040 ec->irq = 32 + slot;
1041 irq_set_chip_and_handler(ec->irq, &ecard_chip,
1042 handle_level_irq);
1043 set_irq_flags(ec->irq, IRQF_VALID);
1044 }
1045
1046 if (slot == 8)
1047 ec->irq = 11;
1048#ifdef CONFIG_ARCH_RPC
1049 /* On RiscPC, only first two slots have DMA capability */
1050 if (slot < 2)
1051 ec->dma = 2 + slot;
1052#endif
1053
1054 for (ecp = &cards; *ecp; ecp = &(*ecp)->next);
1055
1056 *ecp = ec;
1057 slot_to_expcard[slot] = ec;
1058
1059 device_register(&ec->dev);
1060
1061 return 0;
1062
1063 nodev:
1064 ecard_free_card(ec);
1065 nomem:
1066 return rc;
1067}
1068
1069/*
1070 * Initialise the expansion card system.
1071 * Locate all hardware - interrupt management and
1072 * actual cards.
1073 */
1074static int __init ecard_init(void)
1075{
1076 struct task_struct *task;
1077 int slot, irqhw;
1078
1079 task = kthread_run(ecard_task, NULL, "kecardd");
1080 if (IS_ERR(task)) {
1081 printk(KERN_ERR "Ecard: unable to create kernel thread: %ld\n",
1082 PTR_ERR(task));
1083 return PTR_ERR(task);
1084 }
1085
1086 printk("Probing expansion cards\n");
1087
1088 for (slot = 0; slot < 8; slot ++) {
1089 if (ecard_probe(slot, ECARD_EASI) == -ENODEV)
1090 ecard_probe(slot, ECARD_IOC);
1091 }
1092
1093 ecard_probe(8, ECARD_IOC);
1094
1095 irqhw = ecard_probeirqhw();
1096
1097 irq_set_chained_handler(IRQ_EXPANSIONCARD,
1098 irqhw ? ecard_irqexp_handler : ecard_irq_handler);
1099
1100 ecard_proc_init();
1101
1102 return 0;
1103}
1104
1105subsys_initcall(ecard_init);
1106
1107/*
1108 * ECARD "bus"
1109 */
1110static const struct ecard_id *
1111ecard_match_device(const struct ecard_id *ids, struct expansion_card *ec)
1112{
1113 int i;
1114
1115 for (i = 0; ids[i].manufacturer != 65535; i++)
1116 if (ec->cid.manufacturer == ids[i].manufacturer &&
1117 ec->cid.product == ids[i].product)
1118 return ids + i;
1119
1120 return NULL;
1121}
1122
1123static int ecard_drv_probe(struct device *dev)
1124{
1125 struct expansion_card *ec = ECARD_DEV(dev);
1126 struct ecard_driver *drv = ECARD_DRV(dev->driver);
1127 const struct ecard_id *id;
1128 int ret;
1129
1130 id = ecard_match_device(drv->id_table, ec);
1131
1132 ec->claimed = 1;
1133 ret = drv->probe(ec, id);
1134 if (ret)
1135 ec->claimed = 0;
1136 return ret;
1137}
1138
1139static int ecard_drv_remove(struct device *dev)
1140{
1141 struct expansion_card *ec = ECARD_DEV(dev);
1142 struct ecard_driver *drv = ECARD_DRV(dev->driver);
1143
1144 drv->remove(ec);
1145 ec->claimed = 0;
1146
1147 /*
1148 * Restore the default operations. We ensure that the
1149 * ops are set before we change the data.
1150 */
1151 ec->ops = &ecard_default_ops;
1152 barrier();
1153 ec->irq_data = NULL;
1154
1155 return 0;
1156}
1157
1158/*
1159 * Before rebooting, we must make sure that the expansion card is in a
1160 * sensible state, so it can be re-detected. This means that the first
1161 * page of the ROM must be visible. We call the expansion cards reset
1162 * handler, if any.
1163 */
1164static void ecard_drv_shutdown(struct device *dev)
1165{
1166 struct expansion_card *ec = ECARD_DEV(dev);
1167 struct ecard_driver *drv = ECARD_DRV(dev->driver);
1168 struct ecard_request req;
1169
1170 if (dev->driver) {
1171 if (drv->shutdown)
1172 drv->shutdown(ec);
1173 ec->claimed = 0;
1174 }
1175
1176 /*
1177 * If this card has a loader, call the reset handler.
1178 */
1179 if (ec->loader) {
1180 req.fn = ecard_task_reset;
1181 req.ec = ec;
1182 ecard_call(&req);
1183 }
1184}
1185
1186int ecard_register_driver(struct ecard_driver *drv)
1187{
1188 drv->drv.bus = &ecard_bus_type;
1189
1190 return driver_register(&drv->drv);
1191}
1192
1193void ecard_remove_driver(struct ecard_driver *drv)
1194{
1195 driver_unregister(&drv->drv);
1196}
1197
1198static int ecard_match(struct device *_dev, struct device_driver *_drv)
1199{
1200 struct expansion_card *ec = ECARD_DEV(_dev);
1201 struct ecard_driver *drv = ECARD_DRV(_drv);
1202 int ret;
1203
1204 if (drv->id_table) {
1205 ret = ecard_match_device(drv->id_table, ec) != NULL;
1206 } else {
1207 ret = ec->cid.id == drv->id;
1208 }
1209
1210 return ret;
1211}
1212
1213struct bus_type ecard_bus_type = {
1214 .name = "ecard",
1215 .dev_attrs = ecard_dev_attrs,
1216 .match = ecard_match,
1217 .probe = ecard_drv_probe,
1218 .remove = ecard_drv_remove,
1219 .shutdown = ecard_drv_shutdown,
1220};
1221
1222static int ecard_bus_init(void)
1223{
1224 return bus_register(&ecard_bus_type);
1225}
1226
1227postcore_initcall(ecard_bus_init);
1228
1229EXPORT_SYMBOL(ecard_readchunk);
1230EXPORT_SYMBOL(ecard_register_driver);
1231EXPORT_SYMBOL(ecard_remove_driver);
1232EXPORT_SYMBOL(ecard_bus_type);
diff --git a/arch/arm/kernel/ecard.h b/arch/arm/kernel/ecard.h
deleted file mode 100644
index 4642d436be2a..000000000000
--- a/arch/arm/kernel/ecard.h
+++ /dev/null
@@ -1,69 +0,0 @@
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;
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-28 14:57:57 -0500