ARM: riscpc: move ecard.c to arch/arm/mach-rpc

RiscPC is the only platform using the Acorn expansion card support, so
move it into its mach-* directory.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 0 insertions, 1231 deletions

diff --git a/arch/arm/kernel/ecard.c b/arch/arm/kernel/ecard.c
deleted file mode 100644
index 4dd0eda..0000000
--- a/arch/arm/kernel/ecard.c
+++ /dev/null
@@ -1,1231 +0,0 @@
-/*
- *  linux/arch/arm/kernel/ecard.c
- *
- *  Copyright 1995-2001 Russell King
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- *  Find all installed expansion cards, and handle interrupts from them.
- *
- *  Created from information from Acorns RiscOS3 PRMs
- *
- *  08-Dec-1996	RMK	Added code for the 9'th expansion card - the ether
- *			podule slot.
- *  06-May-1997	RMK	Added blacklist for cards whose loader doesn't work.
- *  12-Sep-1997	RMK	Created new handling of interrupt enables/disables
- *			- cards can now register their own routine to control
- *			interrupts (recommended).
- *  29-Sep-1997	RMK	Expansion card interrupt hardware not being re-enabled
- *			on reset from Linux. (Caused cards not to respond
- *			under RiscOS without hard reset).
- *  15-Feb-1998	RMK	Added DMA support
- *  12-Sep-1998	RMK	Added EASI support
- *  10-Jan-1999	RMK	Run loaders in a simulated RISC OS environment.
- *  17-Apr-1999	RMK	Support for EASI Type C cycles.
- */
-#define ECARD_C
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/types.h>
-#include <linux/sched.h>
-#include <linux/interrupt.h>
-#include <linux/completion.h>
-#include <linux/reboot.h>
-#include <linux/mm.h>
-#include <linux/slab.h>
-#include <linux/proc_fs.h>
-#include <linux/seq_file.h>
-#include <linux/device.h>
-#include <linux/init.h>
-#include <linux/mutex.h>
-#include <linux/kthread.h>
-#include <linux/io.h>
-
-#include <asm/dma.h>
-#include <asm/ecard.h>
-#include <mach/hardware.h>
-#include <asm/irq.h>
-#include <asm/mmu_context.h>
-#include <asm/mach/irq.h>
-#include <asm/tlbflush.h>
-
-#include "ecard.h"
-
-#ifndef CONFIG_ARCH_RPC
-#define HAVE_EXPMASK
-#endif
-
-struct ecard_request {
-	void		(*fn)(struct ecard_request *);
-	ecard_t		*ec;
-	unsigned int	address;
-	unsigned int	length;
-	unsigned int	use_loader;
-	void		*buffer;
-	struct completion *complete;
-};
-
-struct expcard_blacklist {
-	unsigned short	 manufacturer;
-	unsigned short	 product;
-	const char	*type;
-};
-
-static ecard_t *cards;
-static ecard_t *slot_to_expcard[MAX_ECARDS];
-static unsigned int ectcr;
-#ifdef HAS_EXPMASK
-static unsigned int have_expmask;
-#endif
-
-/* List of descriptions of cards which don't have an extended
- * identification, or chunk directories containing a description.
- */
-static struct expcard_blacklist __initdata blacklist[] = {
-	{ MANU_ACORN, PROD_ACORN_ETHER1, "Acorn Ether1" }
-};
-
-asmlinkage extern int
-ecard_loader_reset(unsigned long base, loader_t loader);
-asmlinkage extern int
-ecard_loader_read(int off, unsigned long base, loader_t loader);
-
-static inline unsigned short ecard_getu16(unsigned char *v)
-{
-	return v[0] | v[1] << 8;
-}
-
-static inline signed long ecard_gets24(unsigned char *v)
-{
-	return v[0] | v[1] << 8 | v[2] << 16 | ((v[2] & 0x80) ? 0xff000000 : 0);
-}
-
-static inline ecard_t *slot_to_ecard(unsigned int slot)
-{
-	return slot < MAX_ECARDS ? slot_to_expcard[slot] : NULL;
-}
-
-/* ===================== Expansion card daemon ======================== */
-/*
- * Since the loader programs on the expansion cards need to be run
- * in a specific environment, create a separate task with this
- * environment up, and pass requests to this task as and when we
- * need to.
- *
- * This should allow 99% of loaders to be called from Linux.
- *
- * From a security standpoint, we trust the card vendors.  This
- * may be a misplaced trust.
- */
-static void ecard_task_reset(struct ecard_request *req)
-{
-	struct expansion_card *ec = req->ec;
-	struct resource *res;
-
-	res = ec->slot_no == 8
-		? &ec->resource[ECARD_RES_MEMC]
-		: ec->easi
-		  ? &ec->resource[ECARD_RES_EASI]
-		  : &ec->resource[ECARD_RES_IOCSYNC];
-
-	ecard_loader_reset(res->start, ec->loader);
-}
-
-static void ecard_task_readbytes(struct ecard_request *req)
-{
-	struct expansion_card *ec = req->ec;
-	unsigned char *buf = req->buffer;
-	unsigned int len = req->length;
-	unsigned int off = req->address;
-
-	if (ec->slot_no == 8) {
-		void __iomem *base = (void __iomem *)
-				ec->resource[ECARD_RES_MEMC].start;
-
-		/*
-		 * The card maintains an index which increments the address
-		 * into a 4096-byte page on each access.  We need to keep
-		 * track of the counter.
-		 */
-		static unsigned int index;
-		unsigned int page;
-
-		page = (off >> 12) * 4;
-		if (page > 256 * 4)
-			return;
-
-		off &= 4095;
-
-		/*
-		 * If we are reading offset 0, or our current index is
-		 * greater than the offset, reset the hardware index counter.
-		 */
-		if (off == 0 || index > off) {
-			writeb(0, base);
-			index = 0;
-		}
-
-		/*
-		 * Increment the hardware index counter until we get to the
-		 * required offset.  The read bytes are discarded.
-		 */
-		while (index < off) {
-			readb(base + page);
-			index += 1;
-		}
-
-		while (len--) {
-			*buf++ = readb(base + page);
-			index += 1;
-		}
-	} else {
-		unsigned long base = (ec->easi
-			 ? &ec->resource[ECARD_RES_EASI]
-			 : &ec->resource[ECARD_RES_IOCSYNC])->start;
-		void __iomem *pbase = (void __iomem *)base;
-
-		if (!req->use_loader || !ec->loader) {
-			off *= 4;
-			while (len--) {
-				*buf++ = readb(pbase + off);
-				off += 4;
-			}
-		} else {
-			while(len--) {
-				/*
-				 * The following is required by some
-				 * expansion card loader programs.
-				 */
-				*(unsigned long *)0x108 = 0;
-				*buf++ = ecard_loader_read(off++, base,
-							   ec->loader);
-			}
-		}
-	}
-
-}
-
-static DECLARE_WAIT_QUEUE_HEAD(ecard_wait);
-static struct ecard_request *ecard_req;
-static DEFINE_MUTEX(ecard_mutex);
-
-/*
- * Set up the expansion card daemon's page tables.
- */
-static void ecard_init_pgtables(struct mm_struct *mm)
-{
-	struct vm_area_struct vma;
-
-	/* We want to set up the page tables for the following mapping:
-	 *  Virtual	Physical
-	 *  0x03000000	0x03000000
-	 *  0x03010000	unmapped
-	 *  0x03210000	0x03210000
-	 *  0x03400000	unmapped
-	 *  0x08000000	0x08000000
-	 *  0x10000000	unmapped
-	 *
-	 * FIXME: we don't follow this 100% yet.
-	 */
-	pgd_t *src_pgd, *dst_pgd;
-
-	src_pgd = pgd_offset(mm, (unsigned long)IO_BASE);
-	dst_pgd = pgd_offset(mm, IO_START);
-
-	memcpy(dst_pgd, src_pgd, sizeof(pgd_t) * (IO_SIZE / PGDIR_SIZE));
-
-	src_pgd = pgd_offset(mm, (unsigned long)EASI_BASE);
-	dst_pgd = pgd_offset(mm, EASI_START);
-
-	memcpy(dst_pgd, src_pgd, sizeof(pgd_t) * (EASI_SIZE / PGDIR_SIZE));
-
-	vma.vm_mm = mm;
-
-	flush_tlb_range(&vma, IO_START, IO_START + IO_SIZE);
-	flush_tlb_range(&vma, EASI_START, EASI_START + EASI_SIZE);
-}
-
-static int ecard_init_mm(void)
-{
-	struct mm_struct * mm = mm_alloc();
-	struct mm_struct *active_mm = current->active_mm;
-
-	if (!mm)
-		return -ENOMEM;
-
-	current->mm = mm;
-	current->active_mm = mm;
-	activate_mm(active_mm, mm);
-	mmdrop(active_mm);
-	ecard_init_pgtables(mm);
-	return 0;
-}
-
-static int
-ecard_task(void * unused)
-{
-	/*
-	 * Allocate a mm.  We're not a lazy-TLB kernel task since we need
-	 * to set page table entries where the user space would be.  Note
-	 * that this also creates the page tables.  Failure is not an
-	 * option here.
-	 */
-	if (ecard_init_mm())
-		panic("kecardd: unable to alloc mm\n");
-
-	while (1) {
-		struct ecard_request *req;
-
-		wait_event_interruptible(ecard_wait, ecard_req != NULL);
-
-		req = xchg(&ecard_req, NULL);
-		if (req != NULL) {
-			req->fn(req);
-			complete(req->complete);
-		}
-	}
-}
-
-/*
- * Wake the expansion card daemon to action our request.
- *
- * FIXME: The test here is not sufficient to detect if the
- * kcardd is running.
- */
-static void ecard_call(struct ecard_request *req)
-{
-	DECLARE_COMPLETION_ONSTACK(completion);
-
-	req->complete = &completion;
-
-	mutex_lock(&ecard_mutex);
-	ecard_req = req;
-	wake_up(&ecard_wait);
-
-	/*
-	 * Now wait for kecardd to run.
-	 */
-	wait_for_completion(&completion);
-	mutex_unlock(&ecard_mutex);
-}
-
-/* ======================= Mid-level card control ===================== */
-
-static void
-ecard_readbytes(void *addr, ecard_t *ec, int off, int len, int useld)
-{
-	struct ecard_request req;
-
-	req.fn		= ecard_task_readbytes;
-	req.ec		= ec;
-	req.address	= off;
-	req.length	= len;
-	req.use_loader	= useld;
-	req.buffer	= addr;
-
-	ecard_call(&req);
-}
-
-int ecard_readchunk(struct in_chunk_dir *cd, ecard_t *ec, int id, int num)
-{
-	struct ex_chunk_dir excd;
-	int index = 16;
-	int useld = 0;
-
-	if (!ec->cid.cd)
-		return 0;
-
-	while(1) {
-		ecard_readbytes(&excd, ec, index, 8, useld);
-		index += 8;
-		if (c_id(&excd) == 0) {
-			if (!useld && ec->loader) {
-				useld = 1;
-				index = 0;
-				continue;
-			}
-			return 0;
-		}
-		if (c_id(&excd) == 0xf0) { /* link */
-			index = c_start(&excd);
-			continue;
-		}
-		if (c_id(&excd) == 0x80) { /* loader */
-			if (!ec->loader) {
-				ec->loader = kmalloc(c_len(&excd),
-							       GFP_KERNEL);
-				if (ec->loader)
-					ecard_readbytes(ec->loader, ec,
-							(int)c_start(&excd),
-							c_len(&excd), useld);
-				else
-					return 0;
-			}
-			continue;
-		}
-		if (c_id(&excd) == id && num-- == 0)
-			break;
-	}
-
-	if (c_id(&excd) & 0x80) {
-		switch (c_id(&excd) & 0x70) {
-		case 0x70:
-			ecard_readbytes((unsigned char *)excd.d.string, ec,
-					(int)c_start(&excd), c_len(&excd),
-					useld);
-			break;
-		case 0x00:
-			break;
-		}
-	}
-	cd->start_offset = c_start(&excd);
-	memcpy(cd->d.string, excd.d.string, 256);
-	return 1;
-}
-
-/* ======================= Interrupt control ============================ */
-
-static void ecard_def_irq_enable(ecard_t *ec, int irqnr)
-{
-#ifdef HAS_EXPMASK
-	if (irqnr < 4 && have_expmask) {
-		have_expmask |= 1 << irqnr;
-		__raw_writeb(have_expmask, EXPMASK_ENABLE);
-	}
-#endif
-}
-
-static void ecard_def_irq_disable(ecard_t *ec, int irqnr)
-{
-#ifdef HAS_EXPMASK
-	if (irqnr < 4 && have_expmask) {
-		have_expmask &= ~(1 << irqnr);
-		__raw_writeb(have_expmask, EXPMASK_ENABLE);
-	}
-#endif
-}
-
-static int ecard_def_irq_pending(ecard_t *ec)
-{
-	return !ec->irqmask || readb(ec->irqaddr) & ec->irqmask;
-}
-
-static void ecard_def_fiq_enable(ecard_t *ec, int fiqnr)
-{
-	panic("ecard_def_fiq_enable called - impossible");
-}
-
-static void ecard_def_fiq_disable(ecard_t *ec, int fiqnr)
-{
-	panic("ecard_def_fiq_disable called - impossible");
-}
-
-static int ecard_def_fiq_pending(ecard_t *ec)
-{
-	return !ec->fiqmask || readb(ec->fiqaddr) & ec->fiqmask;
-}
-
-static expansioncard_ops_t ecard_default_ops = {
-	ecard_def_irq_enable,
-	ecard_def_irq_disable,
-	ecard_def_irq_pending,
-	ecard_def_fiq_enable,
-	ecard_def_fiq_disable,
-	ecard_def_fiq_pending
-};
-
-/*
- * Enable and disable interrupts from expansion cards.
- * (interrupts are disabled for these functions).
- *
- * They are not meant to be called directly, but via enable/disable_irq.
- */
-static void ecard_irq_unmask(struct irq_data *d)
-{
-	ecard_t *ec = slot_to_ecard(d->irq - 32);
-
-	if (ec) {
-		if (!ec->ops)
-			ec->ops = &ecard_default_ops;
-
-		if (ec->claimed && ec->ops->irqenable)
-			ec->ops->irqenable(ec, d->irq);
-		else
-			printk(KERN_ERR "ecard: rejecting request to "
-				"enable IRQs for %d\n", d->irq);
-	}
-}
-
-static void ecard_irq_mask(struct irq_data *d)
-{
-	ecard_t *ec = slot_to_ecard(d->irq - 32);
-
-	if (ec) {
-		if (!ec->ops)
-			ec->ops = &ecard_default_ops;
-
-		if (ec->ops && ec->ops->irqdisable)
-			ec->ops->irqdisable(ec, d->irq);
-	}
-}
-
-static struct irq_chip ecard_chip = {
-	.name		= "ECARD",
-	.irq_ack	= ecard_irq_mask,
-	.irq_mask	= ecard_irq_mask,
-	.irq_unmask	= ecard_irq_unmask,
-};
-
-void ecard_enablefiq(unsigned int fiqnr)
-{
-	ecard_t *ec = slot_to_ecard(fiqnr);
-
-	if (ec) {
-		if (!ec->ops)
-			ec->ops = &ecard_default_ops;
-
-		if (ec->claimed && ec->ops->fiqenable)
-			ec->ops->fiqenable(ec, fiqnr);
-		else
-			printk(KERN_ERR "ecard: rejecting request to "
-				"enable FIQs for %d\n", fiqnr);
-	}
-}
-
-void ecard_disablefiq(unsigned int fiqnr)
-{
-	ecard_t *ec = slot_to_ecard(fiqnr);
-
-	if (ec) {
-		if (!ec->ops)
-			ec->ops = &ecard_default_ops;
-
-		if (ec->ops->fiqdisable)
-			ec->ops->fiqdisable(ec, fiqnr);
-	}
-}
-
-static void ecard_dump_irq_state(void)
-{
-	ecard_t *ec;
-
-	printk("Expansion card IRQ state:\n");
-
-	for (ec = cards; ec; ec = ec->next) {
-		if (ec->slot_no == 8)
-			continue;
-
-		printk("  %d: %sclaimed, ",
-		       ec->slot_no, ec->claimed ? "" : "not ");
-
-		if (ec->ops && ec->ops->irqpending &&
-		    ec->ops != &ecard_default_ops)
-			printk("irq %spending\n",
-			       ec->ops->irqpending(ec) ? "" : "not ");
-		else
-			printk("irqaddr %p, mask = %02X, status = %02X\n",
-			       ec->irqaddr, ec->irqmask, readb(ec->irqaddr));
-	}
-}
-
-static void ecard_check_lockup(struct irq_desc *desc)
-{
-	static unsigned long last;
-	static int lockup;
-
-	/*
-	 * If the timer interrupt has not run since the last million
-	 * unrecognised expansion card interrupts, then there is
-	 * something seriously wrong.  Disable the expansion card
-	 * interrupts so at least we can continue.
-	 *
-	 * Maybe we ought to start a timer to re-enable them some time
-	 * later?
-	 */
-	if (last == jiffies) {
-		lockup += 1;
-		if (lockup > 1000000) {
-			printk(KERN_ERR "\nInterrupt lockup detected - "
-			       "disabling all expansion card interrupts\n");
-
-			desc->irq_data.chip->irq_mask(&desc->irq_data);
-			ecard_dump_irq_state();
-		}
-	} else
-		lockup = 0;
-
-	/*
-	 * If we did not recognise the source of this interrupt,
-	 * warn the user, but don't flood the user with these messages.
-	 */
-	if (!last || time_after(jiffies, last + 5*HZ)) {
-		last = jiffies;
-		printk(KERN_WARNING "Unrecognised interrupt from backplane\n");
-		ecard_dump_irq_state();
-	}
-}
-
-static void
-ecard_irq_handler(unsigned int irq, struct irq_desc *desc)
-{
-	ecard_t *ec;
-	int called = 0;
-
-	desc->irq_data.chip->irq_mask(&desc->irq_data);
-	for (ec = cards; ec; ec = ec->next) {
-		int pending;
-
-		if (!ec->claimed || ec->irq == NO_IRQ || ec->slot_no == 8)
-			continue;
-
-		if (ec->ops && ec->ops->irqpending)
-			pending = ec->ops->irqpending(ec);
-		else
-			pending = ecard_default_ops.irqpending(ec);
-
-		if (pending) {
-			generic_handle_irq(ec->irq);
-			called ++;
-		}
-	}
-	desc->irq_data.chip->irq_unmask(&desc->irq_data);
-
-	if (called == 0)
-		ecard_check_lockup(desc);
-}
-
-#ifdef HAS_EXPMASK
-static unsigned char priority_masks[] =
-{
-	0xf0, 0xf1, 0xf3, 0xf7, 0xff, 0xff, 0xff, 0xff
-};
-
-static unsigned char first_set[] =
-{
-	0x00, 0x00, 0x01, 0x00, 0x02, 0x00, 0x01, 0x00,
-	0x03, 0x00, 0x01, 0x00, 0x02, 0x00, 0x01, 0x00
-};
-
-static void
-ecard_irqexp_handler(unsigned int irq, struct irq_desc *desc)
-{
-	const unsigned int statusmask = 15;
-	unsigned int status;
-
-	status = __raw_readb(EXPMASK_STATUS) & statusmask;
-	if (status) {
-		unsigned int slot = first_set[status];
-		ecard_t *ec = slot_to_ecard(slot);
-
-		if (ec->claimed) {
-			/*
-			 * this ugly code is so that we can operate a
-			 * prioritorising system:
-			 *
-			 * Card 0 	highest priority
-			 * Card 1
-			 * Card 2
-			 * Card 3	lowest priority
-			 *
-			 * Serial cards should go in 0/1, ethernet/scsi in 2/3
-			 * otherwise you will lose serial data at high speeds!
-			 */
-			generic_handle_irq(ec->irq);
-		} else {
-			printk(KERN_WARNING "card%d: interrupt from unclaimed "
-			       "card???\n", slot);
-			have_expmask &= ~(1 << slot);
-			__raw_writeb(have_expmask, EXPMASK_ENABLE);
-		}
-	} else
-		printk(KERN_WARNING "Wild interrupt from backplane (masks)\n");
-}
-
-static int __init ecard_probeirqhw(void)
-{
-	ecard_t *ec;
-	int found;
-
-	__raw_writeb(0x00, EXPMASK_ENABLE);
-	__raw_writeb(0xff, EXPMASK_STATUS);
-	found = (__raw_readb(EXPMASK_STATUS) & 15) == 0;
-	__raw_writeb(0xff, EXPMASK_ENABLE);
-
-	if (found) {
-		printk(KERN_DEBUG "Expansion card interrupt "
-		       "management hardware found\n");
-
-		/* for each card present, set a bit to '1' */
-		have_expmask = 0x80000000;
-
-		for (ec = cards; ec; ec = ec->next)
-			have_expmask |= 1 << ec->slot_no;
-
-		__raw_writeb(have_expmask, EXPMASK_ENABLE);
-	}
-
-	return found;
-}
-#else
-#define ecard_irqexp_handler NULL
-#define ecard_probeirqhw() (0)
-#endif
-
-static void __iomem *__ecard_address(ecard_t *ec, card_type_t type, card_speed_t speed)
-{
-	void __iomem *address = NULL;
-	int slot = ec->slot_no;
-
-	if (ec->slot_no == 8)
-		return ECARD_MEMC8_BASE;
-
-	ectcr &= ~(1 << slot);
-
-	switch (type) {
-	case ECARD_MEMC:
-		if (slot < 4)
-			address = ECARD_MEMC_BASE + (slot << 14);
-		break;
-
-	case ECARD_IOC:
-		if (slot < 4)
-			address = ECARD_IOC_BASE + (slot << 14);
-		else
-			address = ECARD_IOC4_BASE + ((slot - 4) << 14);
-		if (address)
-			address += speed << 19;
-		break;
-
-	case ECARD_EASI:
-		address = ECARD_EASI_BASE + (slot << 24);
-		if (speed == ECARD_FAST)
-			ectcr |= 1 << slot;
-		break;
-
-	default:
-		break;
-	}
-
-#ifdef IOMD_ECTCR
-	iomd_writeb(ectcr, IOMD_ECTCR);
-#endif
-	return address;
-}
-
-static int ecard_prints(struct seq_file *m, ecard_t *ec)
-{
-	seq_printf(m, "  %d: %s ", ec->slot_no, ec->easi ? "EASI" : "    ");
-
-	if (ec->cid.id == 0) {
-		struct in_chunk_dir incd;
-
-		seq_printf(m, "[%04X:%04X] ",
-			ec->cid.manufacturer, ec->cid.product);
-
-		if (!ec->card_desc && ec->cid.cd &&
-		    ecard_readchunk(&incd, ec, 0xf5, 0)) {
-			ec->card_desc = kmalloc(strlen(incd.d.string)+1, GFP_KERNEL);
-
-			if (ec->card_desc)
-				strcpy((char *)ec->card_desc, incd.d.string);
-		}
-
-		seq_printf(m, "%s\n", ec->card_desc ? ec->card_desc : "*unknown*");
-	} else
-		seq_printf(m, "Simple card %d\n", ec->cid.id);
-
-	return 0;
-}
-
-static int ecard_devices_proc_show(struct seq_file *m, void *v)
-{
-	ecard_t *ec = cards;
-
-	while (ec) {
-		ecard_prints(m, ec);
-		ec = ec->next;
-	}
-	return 0;
-}
-
-static int ecard_devices_proc_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, ecard_devices_proc_show, NULL);
-}
-
-static const struct file_operations bus_ecard_proc_fops = {
-	.owner		= THIS_MODULE,
-	.open		= ecard_devices_proc_open,
-	.read		= seq_read,
-	.llseek		= seq_lseek,
-	.release	= single_release,
-};
-
-static struct proc_dir_entry *proc_bus_ecard_dir = NULL;
-
-static void ecard_proc_init(void)
-{
-	proc_bus_ecard_dir = proc_mkdir("bus/ecard", NULL);
-	proc_create("devices", 0, proc_bus_ecard_dir, &bus_ecard_proc_fops);
-}
-
-#define ec_set_resource(ec,nr,st,sz)				\
-	do {							\
-		(ec)->resource[nr].name = dev_name(&ec->dev);	\
-		(ec)->resource[nr].start = st;			\
-		(ec)->resource[nr].end = (st) + (sz) - 1;	\
-		(ec)->resource[nr].flags = IORESOURCE_MEM;	\
-	} while (0)
-
-static void __init ecard_free_card(struct expansion_card *ec)
-{
-	int i;
-
-	for (i = 0; i < ECARD_NUM_RESOURCES; i++)
-		if (ec->resource[i].flags)
-			release_resource(&ec->resource[i]);
-
-	kfree(ec);
-}
-
-static struct expansion_card *__init ecard_alloc_card(int type, int slot)
-{
-	struct expansion_card *ec;
-	unsigned long base;
-	int i;
-
-	ec = kzalloc(sizeof(ecard_t), GFP_KERNEL);
-	if (!ec) {
-		ec = ERR_PTR(-ENOMEM);
-		goto nomem;
-	}
-
-	ec->slot_no = slot;
-	ec->easi = type == ECARD_EASI;
-	ec->irq = NO_IRQ;
-	ec->fiq = NO_IRQ;
-	ec->dma = NO_DMA;
-	ec->ops = &ecard_default_ops;
-
-	dev_set_name(&ec->dev, "ecard%d", slot);
-	ec->dev.parent = NULL;
-	ec->dev.bus = &ecard_bus_type;
-	ec->dev.dma_mask = &ec->dma_mask;
-	ec->dma_mask = (u64)0xffffffff;
-	ec->dev.coherent_dma_mask = ec->dma_mask;
-
-	if (slot < 4) {
-		ec_set_resource(ec, ECARD_RES_MEMC,
-				PODSLOT_MEMC_BASE + (slot << 14),
-				PODSLOT_MEMC_SIZE);
-		base = PODSLOT_IOC0_BASE + (slot << 14);
-	} else
-		base = PODSLOT_IOC4_BASE + ((slot - 4) << 14);
-
-#ifdef CONFIG_ARCH_RPC
-	if (slot < 8) {
-		ec_set_resource(ec, ECARD_RES_EASI,
-				PODSLOT_EASI_BASE + (slot << 24),
-				PODSLOT_EASI_SIZE);
-	}
-
-	if (slot == 8) {
-		ec_set_resource(ec, ECARD_RES_MEMC, NETSLOT_BASE, NETSLOT_SIZE);
-	} else
-#endif
-
-	for (i = 0; i <= ECARD_RES_IOCSYNC - ECARD_RES_IOCSLOW; i++)
-		ec_set_resource(ec, i + ECARD_RES_IOCSLOW,
-				base + (i << 19), PODSLOT_IOC_SIZE);
-
-	for (i = 0; i < ECARD_NUM_RESOURCES; i++) {
-		if (ec->resource[i].flags &&
-		    request_resource(&iomem_resource, &ec->resource[i])) {
-			dev_err(&ec->dev, "resource(s) not available\n");
-			ec->resource[i].end -= ec->resource[i].start;
-			ec->resource[i].start = 0;
-			ec->resource[i].flags = 0;
-		}
-	}
-
- nomem:
-	return ec;
-}
-
-static ssize_t ecard_show_irq(struct device *dev, struct device_attribute *attr, char *buf)
-{
-	struct expansion_card *ec = ECARD_DEV(dev);
-	return sprintf(buf, "%u\n", ec->irq);
-}
-
-static ssize_t ecard_show_dma(struct device *dev, struct device_attribute *attr, char *buf)
-{
-	struct expansion_card *ec = ECARD_DEV(dev);
-	return sprintf(buf, "%u\n", ec->dma);
-}
-
-static ssize_t ecard_show_resources(struct device *dev, struct device_attribute *attr, char *buf)
-{
-	struct expansion_card *ec = ECARD_DEV(dev);
-	char *str = buf;
-	int i;
-
-	for (i = 0; i < ECARD_NUM_RESOURCES; i++)
-		str += sprintf(str, "%08x %08x %08lx\n",
-				ec->resource[i].start,
-				ec->resource[i].end,
-				ec->resource[i].flags);
-
-	return str - buf;
-}
-
-static ssize_t ecard_show_vendor(struct device *dev, struct device_attribute *attr, char *buf)
-{
-	struct expansion_card *ec = ECARD_DEV(dev);
-	return sprintf(buf, "%u\n", ec->cid.manufacturer);
-}
-
-static ssize_t ecard_show_device(struct device *dev, struct device_attribute *attr, char *buf)
-{
-	struct expansion_card *ec = ECARD_DEV(dev);
-	return sprintf(buf, "%u\n", ec->cid.product);
-}
-
-static ssize_t ecard_show_type(struct device *dev, struct device_attribute *attr, char *buf)
-{
-	struct expansion_card *ec = ECARD_DEV(dev);
-	return sprintf(buf, "%s\n", ec->easi ? "EASI" : "IOC");
-}
-
-static struct device_attribute ecard_dev_attrs[] = {
-	__ATTR(device,   S_IRUGO, ecard_show_device,    NULL),
-	__ATTR(dma,      S_IRUGO, ecard_show_dma,       NULL),
-	__ATTR(irq,      S_IRUGO, ecard_show_irq,       NULL),
-	__ATTR(resource, S_IRUGO, ecard_show_resources, NULL),
-	__ATTR(type,     S_IRUGO, ecard_show_type,      NULL),
-	__ATTR(vendor,   S_IRUGO, ecard_show_vendor,    NULL),
-	__ATTR_NULL,
-};
-
-
-int ecard_request_resources(struct expansion_card *ec)
-{
-	int i, err = 0;
-
-	for (i = 0; i < ECARD_NUM_RESOURCES; i++) {
-		if (ecard_resource_end(ec, i) &&
-		    !request_mem_region(ecard_resource_start(ec, i),
-					ecard_resource_len(ec, i),
-					ec->dev.driver->name)) {
-			err = -EBUSY;
-			break;
-		}
-	}
-
-	if (err) {
-		while (i--)
-			if (ecard_resource_end(ec, i))
-				release_mem_region(ecard_resource_start(ec, i),
-						   ecard_resource_len(ec, i));
-	}
-	return err;
-}
-EXPORT_SYMBOL(ecard_request_resources);
-
-void ecard_release_resources(struct expansion_card *ec)
-{
-	int i;
-
-	for (i = 0; i < ECARD_NUM_RESOURCES; i++)
-		if (ecard_resource_end(ec, i))
-			release_mem_region(ecard_resource_start(ec, i),
-					   ecard_resource_len(ec, i));
-}
-EXPORT_SYMBOL(ecard_release_resources);
-
-void ecard_setirq(struct expansion_card *ec, const struct expansion_card_ops *ops, void *irq_data)
-{
-	ec->irq_data = irq_data;
-	barrier();
-	ec->ops = ops;
-}
-EXPORT_SYMBOL(ecard_setirq);
-
-void __iomem *ecardm_iomap(struct expansion_card *ec, unsigned int res,
-			   unsigned long offset, unsigned long maxsize)
-{
-	unsigned long start = ecard_resource_start(ec, res);
-	unsigned long end = ecard_resource_end(ec, res);
-
-	if (offset > (end - start))
-		return NULL;
-
-	start += offset;
-	if (maxsize && end - start > maxsize)
-		end = start + maxsize;
-	
-	return devm_ioremap(&ec->dev, start, end - start);
-}
-EXPORT_SYMBOL(ecardm_iomap);
-
-/*
- * Probe for an expansion card.
- *
- * If bit 1 of the first byte of the card is set, then the
- * card does not exist.
- */
-static int __init
-ecard_probe(int slot, card_type_t type)
-{
-	ecard_t **ecp;
-	ecard_t *ec;
-	struct ex_ecid cid;
-	void __iomem *addr;
-	int i, rc;
-
-	ec = ecard_alloc_card(type, slot);
-	if (IS_ERR(ec)) {
-		rc = PTR_ERR(ec);
-		goto nomem;
-	}
-
-	rc = -ENODEV;
-	if ((addr = __ecard_address(ec, type, ECARD_SYNC)) == NULL)
-		goto nodev;
-
-	cid.r_zero = 1;
-	ecard_readbytes(&cid, ec, 0, 16, 0);
-	if (cid.r_zero)
-		goto nodev;
-
-	ec->cid.id	= cid.r_id;
-	ec->cid.cd	= cid.r_cd;
-	ec->cid.is	= cid.r_is;
-	ec->cid.w	= cid.r_w;
-	ec->cid.manufacturer = ecard_getu16(cid.r_manu);
-	ec->cid.product = ecard_getu16(cid.r_prod);
-	ec->cid.country = cid.r_country;
-	ec->cid.irqmask = cid.r_irqmask;
-	ec->cid.irqoff  = ecard_gets24(cid.r_irqoff);
-	ec->cid.fiqmask = cid.r_fiqmask;
-	ec->cid.fiqoff  = ecard_gets24(cid.r_fiqoff);
-	ec->fiqaddr	=
-	ec->irqaddr	= addr;
-
-	if (ec->cid.is) {
-		ec->irqmask = ec->cid.irqmask;
-		ec->irqaddr += ec->cid.irqoff;
-		ec->fiqmask = ec->cid.fiqmask;
-		ec->fiqaddr += ec->cid.fiqoff;
-	} else {
-		ec->irqmask = 1;
-		ec->fiqmask = 4;
-	}
-
-	for (i = 0; i < ARRAY_SIZE(blacklist); i++)
-		if (blacklist[i].manufacturer == ec->cid.manufacturer &&
-		    blacklist[i].product == ec->cid.product) {
-			ec->card_desc = blacklist[i].type;
-			break;
-		}
-
-	/*
-	 * hook the interrupt handlers
-	 */
-	if (slot < 8) {
-		ec->irq = 32 + slot;
-		irq_set_chip_and_handler(ec->irq, &ecard_chip,
-					 handle_level_irq);
-		set_irq_flags(ec->irq, IRQF_VALID);
-	}
-
-	if (slot == 8)
-		ec->irq = 11;
-#ifdef CONFIG_ARCH_RPC
-	/* On RiscPC, only first two slots have DMA capability */
-	if (slot < 2)
-		ec->dma = 2 + slot;
-#endif
-
-	for (ecp = &cards; *ecp; ecp = &(*ecp)->next);
-
-	*ecp = ec;
-	slot_to_expcard[slot] = ec;
-
-	device_register(&ec->dev);
-
-	return 0;
-
- nodev:
-	ecard_free_card(ec);
- nomem:
-	return rc;
-}
-
-/*
- * Initialise the expansion card system.
- * Locate all hardware - interrupt management and
- * actual cards.
- */
-static int __init ecard_init(void)
-{
-	struct task_struct *task;
-	int slot, irqhw;
-
-	task = kthread_run(ecard_task, NULL, "kecardd");
-	if (IS_ERR(task)) {
-		printk(KERN_ERR "Ecard: unable to create kernel thread: %ld\n",
-		       PTR_ERR(task));
-		return PTR_ERR(task);
-	}
-
-	printk("Probing expansion cards\n");
-
-	for (slot = 0; slot < 8; slot ++) {
-		if (ecard_probe(slot, ECARD_EASI) == -ENODEV)
-			ecard_probe(slot, ECARD_IOC);
-	}
-
-	ecard_probe(8, ECARD_IOC);
-
-	irqhw = ecard_probeirqhw();
-
-	irq_set_chained_handler(IRQ_EXPANSIONCARD,
-				irqhw ? ecard_irqexp_handler : ecard_irq_handler);
-
-	ecard_proc_init();
-
-	return 0;
-}
-
-subsys_initcall(ecard_init);
-
-/*
- *	ECARD "bus"
- */
-static const struct ecard_id *
-ecard_match_device(const struct ecard_id *ids, struct expansion_card *ec)
-{
-	int i;
-
-	for (i = 0; ids[i].manufacturer != 65535; i++)
-		if (ec->cid.manufacturer == ids[i].manufacturer &&
-		    ec->cid.product == ids[i].product)
-			return ids + i;
-
-	return NULL;
-}
-
-static int ecard_drv_probe(struct device *dev)
-{
-	struct expansion_card *ec = ECARD_DEV(dev);
-	struct ecard_driver *drv = ECARD_DRV(dev->driver);
-	const struct ecard_id *id;
-	int ret;
-
-	id = ecard_match_device(drv->id_table, ec);
-
-	ec->claimed = 1;
-	ret = drv->probe(ec, id);
-	if (ret)
-		ec->claimed = 0;
-	return ret;
-}
-
-static int ecard_drv_remove(struct device *dev)
-{
-	struct expansion_card *ec = ECARD_DEV(dev);
-	struct ecard_driver *drv = ECARD_DRV(dev->driver);
-
-	drv->remove(ec);
-	ec->claimed = 0;
-
-	/*
-	 * Restore the default operations.  We ensure that the
-	 * ops are set before we change the data.
-	 */
-	ec->ops = &ecard_default_ops;
-	barrier();
-	ec->irq_data = NULL;
-
-	return 0;
-}
-
-/*
- * Before rebooting, we must make sure that the expansion card is in a
- * sensible state, so it can be re-detected.  This means that the first
- * page of the ROM must be visible.  We call the expansion cards reset
- * handler, if any.
- */
-static void ecard_drv_shutdown(struct device *dev)
-{
-	struct expansion_card *ec = ECARD_DEV(dev);
-	struct ecard_driver *drv = ECARD_DRV(dev->driver);
-	struct ecard_request req;
-
-	if (dev->driver) {
-		if (drv->shutdown)
-			drv->shutdown(ec);
-		ec->claimed = 0;
-	}
-
-	/*
-	 * If this card has a loader, call the reset handler.
-	 */
-	if (ec->loader) {
-		req.fn = ecard_task_reset;
-		req.ec = ec;
-		ecard_call(&req);
-	}
-}
-
-int ecard_register_driver(struct ecard_driver *drv)
-{
-	drv->drv.bus = &ecard_bus_type;
-
-	return driver_register(&drv->drv);
-}
-
-void ecard_remove_driver(struct ecard_driver *drv)
-{
-	driver_unregister(&drv->drv);
-}
-
-static int ecard_match(struct device *_dev, struct device_driver *_drv)
-{
-	struct expansion_card *ec = ECARD_DEV(_dev);
-	struct ecard_driver *drv = ECARD_DRV(_drv);
-	int ret;
-
-	if (drv->id_table) {
-		ret = ecard_match_device(drv->id_table, ec) != NULL;
-	} else {
-		ret = ec->cid.id == drv->id;
-	}
-
-	return ret;
-}
-
-struct bus_type ecard_bus_type = {
-	.name		= "ecard",
-	.dev_attrs	= ecard_dev_attrs,
-	.match		= ecard_match,
-	.probe		= ecard_drv_probe,
-	.remove		= ecard_drv_remove,
-	.shutdown	= ecard_drv_shutdown,
-};
-
-static int ecard_bus_init(void)
-{
-	return bus_register(&ecard_bus_type);
-}
-
-postcore_initcall(ecard_bus_init);
-
-EXPORT_SYMBOL(ecard_readchunk);
-EXPORT_SYMBOL(ecard_register_driver);
-EXPORT_SYMBOL(ecard_remove_driver);
-EXPORT_SYMBOL(ecard_bus_type);