tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2** hppb.c:
3** HP-PB bus driver for the NOVA and K-Class systems.
4**
5** (c) Copyright 2002 Ryan Bradetich
6** (c) Copyright 2002 Hewlett-Packard Company
7**
8** This program is free software; you can redistribute it and/or modify
9** it under the terms of the GNU General Public License as published by
10** the Free Software Foundation; either version 2 of the License, or
11** (at your option) any later version.
12**
13*/
14
15#include <linux/types.h>
16#include <linux/init.h>
17#include <linux/mm.h>
18#include <linux/slab.h>
19#include <linux/ioport.h>
20
21#include <asm/io.h>
22#include <asm/hardware.h>
23#include <asm/parisc-device.h>
24
25#include <linux/pci.h>
26
27struct hppb_card {
28 unsigned long hpa;
29 struct resource mmio_region;
30 struct hppb_card *next;
31};
32
33struct hppb_card hppb_card_head = {
34 .hpa = 0,
35 .next = NULL,
36};
37
38#define IO_IO_LOW offsetof(struct bc_module, io_io_low)
39#define IO_IO_HIGH offsetof(struct bc_module, io_io_high)
40
41/**
42 * hppb_probe - Determine if the hppb driver should claim this device.
43 * @dev: The device which has been found
44 *
45 * Determine if hppb driver should claim this chip (return 0) or not
46 * (return 1). If so, initialize the chip and tell other partners in crime
47 * they have work to do.
48 */
49static int hppb_probe(struct parisc_device *dev)
50{
51 int status;
52 struct hppb_card *card = &hppb_card_head;
53
54 while(card->next) {
55 card = card->next;
56 }
57
58 if(card->hpa) {
59 card->next = kzalloc(sizeof(struct hppb_card), GFP_KERNEL);
60 if(!card->next) {
61 printk(KERN_ERR "HP-PB: Unable to allocate memory.\n");
62 return 1;
63 }
64 card = card->next;
65 }
66 printk(KERN_INFO "Found GeckoBoa at 0x%x\n", dev->hpa.start);
67
68 card->hpa = dev->hpa.start;
69 card->mmio_region.name = "HP-PB Bus";
70 card->mmio_region.flags = IORESOURCE_MEM;
71
72 card->mmio_region.start = gsc_readl(dev->hpa.start + IO_IO_LOW);
73 card->mmio_region.end = gsc_readl(dev->hpa.start + IO_IO_HIGH) - 1;
74
75 status = ccio_request_resource(dev, &card->mmio_region);
76 if(status < 0) {
77 printk(KERN_ERR "%s: failed to claim HP-PB bus space (%08x, %08x)\n",
78 __FILE__, card->mmio_region.start, card->mmio_region.end);
79 }
80
81 return 0;
82}
83
84static struct parisc_device_id hppb_tbl[] = {
85 { HPHW_BCPORT, HVERSION_REV_ANY_ID, 0x500, 0xc }, /* E25 and K */
86 { HPHW_BCPORT, 0x0, 0x501, 0xc }, /* E35 */
87 { HPHW_BCPORT, 0x0, 0x502, 0xc }, /* E45 */
88 { HPHW_BCPORT, 0x0, 0x503, 0xc }, /* E55 */
89 { 0, }
90};
91
92static struct parisc_driver hppb_driver = {
93 .name = "gecko_boa",
94 .id_table = hppb_tbl,
95 .probe = hppb_probe,
96};
97
98/**
99 * hppb_init - HP-PB bus initalization procedure.
100 *
101 * Register this driver.
102 */
103void __init hppb_init(void)
104{
105 register_parisc_driver(&hppb_driver);
106}