Commit | Line | Data |
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1da177e4 LT |
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 | ** | |
1da177e4 LT |
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 | ||
27 | struct hppb_card { | |
28 | unsigned long hpa; | |
29 | struct resource mmio_region; | |
30 | struct hppb_card *next; | |
31 | }; | |
32 | ||
33 | struct 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 | */ | |
49 | static 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) { | |
cb6fc18e | 59 | card->next = kzalloc(sizeof(struct hppb_card), GFP_KERNEL); |
1da177e4 LT |
60 | if(!card->next) { |
61 | printk(KERN_ERR "HP-PB: Unable to allocate memory.\n"); | |
62 | return 1; | |
63 | } | |
1da177e4 LT |
64 | card = card->next; |
65 | } | |
075b8783 | 66 | printk(KERN_INFO "Found GeckoBoa at 0x%x\n", dev->hpa.start); |
1da177e4 | 67 | |
53f01bba | 68 | card->hpa = dev->hpa.start; |
1da177e4 LT |
69 | card->mmio_region.name = "HP-PB Bus"; |
70 | card->mmio_region.flags = IORESOURCE_MEM; | |
71 | ||
53f01bba MW |
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; | |
1da177e4 LT |
74 | |
75 | status = ccio_request_resource(dev, &card->mmio_region); | |
76 | if(status < 0) { | |
075b8783 | 77 | printk(KERN_ERR "%s: failed to claim HP-PB bus space (%08x, %08x)\n", |
1da177e4 LT |
78 | __FILE__, card->mmio_region.start, card->mmio_region.end); |
79 | } | |
80 | ||
81 | return 0; | |
82 | } | |
83 | ||
1da177e4 | 84 | static struct parisc_device_id hppb_tbl[] = { |
075b8783 RB |
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 */ | |
1da177e4 LT |
89 | { 0, } |
90 | }; | |
91 | ||
92 | static struct parisc_driver hppb_driver = { | |
bdad1f83 | 93 | .name = "gecko_boa", |
1da177e4 LT |
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 | */ | |
103 | void __init hppb_init(void) | |
104 | { | |
105 | register_parisc_driver(&hppb_driver); | |
106 | } |