mirror of
https://github.com/torvalds/linux.git
synced 2025-11-04 10:40:15 +02:00
106 lines
2.7 KiB
C
106 lines
2.7 KiB
C
/*
|
|
** 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>
|
|
|
|
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;
|
|
}
|
|
card = card->next;
|
|
}
|
|
printk(KERN_INFO "Found GeckoBoa at 0x%llx\n",
|
|
(unsigned long long) dev->hpa.start);
|
|
|
|
card->hpa = dev->hpa.start;
|
|
card->mmio_region.name = "HP-PB Bus";
|
|
card->mmio_region.flags = IORESOURCE_MEM;
|
|
|
|
card->mmio_region.start = gsc_readl(dev->hpa.start + IO_IO_LOW);
|
|
card->mmio_region.end = gsc_readl(dev->hpa.start + IO_IO_HIGH) - 1;
|
|
|
|
status = ccio_request_resource(dev, &card->mmio_region);
|
|
if(status < 0) {
|
|
printk(KERN_ERR "%s: failed to claim HP-PB bus space (%pR)\n",
|
|
__FILE__, &card->mmio_region);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct parisc_device_id hppb_tbl[] __initconst = {
|
|
{ HPHW_BCPORT, HVERSION_REV_ANY_ID, 0x500, 0xc }, /* E25 and K */
|
|
{ HPHW_BCPORT, 0x0, 0x501, 0xc }, /* E35 */
|
|
{ HPHW_BCPORT, 0x0, 0x502, 0xc }, /* E45 */
|
|
{ HPHW_BCPORT, 0x0, 0x503, 0xc }, /* E55 */
|
|
{ 0, }
|
|
};
|
|
|
|
static struct parisc_driver hppb_driver __refdata = {
|
|
.name = "gecko_boa",
|
|
.id_table = hppb_tbl,
|
|
.probe = hppb_probe,
|
|
};
|
|
|
|
/**
|
|
* hppb_init - HP-PB bus initialization procedure.
|
|
*
|
|
* Register this driver.
|
|
*/
|
|
void __init hppb_init(void)
|
|
{
|
|
register_parisc_driver(&hppb_driver);
|
|
}
|