linux-imx

/*

** hppb.c:

**      HP-PB bus driver for the NOVA and K-Class systems.

**

**      (c) Copyright 2002 Ryan Bradetich

**      (c) Copyright 2002 Hewlett-Packard Company

**

** This program is free software; you can redistribute it and/or modify

** it under the terms of the GNU General Public License as published by

** the Free Software Foundation; either version 2 of the License, or

** (at your option) any later version.

**

*/

​

#include <linux/types.h>

#include <linux/init.h>

#include <linux/mm.h>

#include <linux/slab.h>

#include <linux/dma-mapping.h>

#include <linux/ioport.h>

​

#include <asm/io.h>

#include <asm/hardware.h>

#include <asm/parisc-device.h>

​

#include "iommu.h"

​

struct hppb_card {

    unsigned long hpa;

    struct resource mmio_region;

    struct hppb_card *next;

};

​

static struct hppb_card hppb_card_head = {

    .hpa = 0,

    .next = NULL,

};

​

#define IO_IO_LOW  offsetof(struct bc_module, io_io_low)

#define IO_IO_HIGH offsetof(struct bc_module, io_io_high)

​

/**

 * hppb_probe - Determine if the hppb driver should claim this device.

 * @dev: The device which has been found

 *

 * Determine if hppb driver should claim this chip (return 0) or not 

 * (return 1). If so, initialize the chip and tell other partners in crime 

 * they have work to do.

 */

static int __init hppb_probe(struct parisc_device *dev)

{

    int status;

    struct hppb_card *card = &hppb_card_head;

​

    while(card->next) {

        card = card->next;

    }

​

    if(card->hpa) {

        card->next = kzalloc(sizeof(struct hppb_card), GFP_KERNEL);

        if(!card->next) {

            printk(KERN_ERR "HP-PB: Unable to allocate memory.\n");

            return 1;