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Commit 530c2eaa authored by Russell King's avatar Russell King
Browse files

ARM: riscpc: remove expansion card irq mask register 



This register is only present on older platforms, and not on RiscPC,
so lets remove this unused support.

Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent b4ac0849

arch/arm/mach-rpc/ecard.c

+2 −101
Original line number Diff line number Diff line
@@ -55,10 +55,6 @@ 


#include "ecard.h"



#ifndef CONFIG_ARCH_RPC

#define HAVE_EXPMASK

#endif



struct ecard_request {

	void		(*fn)(struct ecard_request *);

	ecard_t		*ec;
@@ -78,9 +74,6 @@ struct expcard_blacklist { 
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.
@@ -391,22 +384,10 @@ int ecard_readchunk(struct in_chunk_dir *cd, ecard_t *ec, int id, int num) 


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)
@@ -598,83 +579,6 @@ ecard_irq_handler(unsigned int irq, struct irq_desc *desc) 
		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;
@@ -1073,7 +977,7 @@ static int __init ecard_probe(int slot, unsigned irq, card_type_t type) 
static int __init ecard_init(void)

{

	struct task_struct *task;

	int slot, irqhw, irqbase;

	int slot, irqbase;



	irqbase = irq_alloc_descs(-1, 0, 8, -1);

	if (irqbase < 0)
@@ -1096,10 +1000,7 @@ static int __init ecard_init(void) 


	ecard_probe(8, 11, ECARD_IOC);



	irqhw = ecard_probeirqhw();



	irq_set_chained_handler(IRQ_EXPANSIONCARD,

				irqhw ? ecard_irqexp_handler : ecard_irq_handler);

	irq_set_chained_handler(IRQ_EXPANSIONCARD, ecard_irq_handler);



	ecard_proc_init();