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> | |
bec85e80 | 19 | #include <linux/dma-mapping.h> |
1da177e4 LT |
20 | #include <linux/ioport.h> |
21 | ||
22 | #include <asm/io.h> | |
23 | #include <asm/hardware.h> | |
24 | #include <asm/parisc-device.h> | |
25 | ||
9b8eeab0 CH |
26 | #include "iommu.h" |
27 | ||
1da177e4 LT |
28 | struct hppb_card { |
29 | unsigned long hpa; | |
30 | struct resource mmio_region; | |
31 | struct hppb_card *next; | |
32 | }; | |
33 | ||
df8e5bc6 | 34 | static struct hppb_card hppb_card_head = { |
1da177e4 LT |
35 | .hpa = 0, |
36 | .next = NULL, | |
37 | }; | |
38 | ||
39 | #define IO_IO_LOW offsetof(struct bc_module, io_io_low) | |
40 | #define IO_IO_HIGH offsetof(struct bc_module, io_io_high) | |
41 | ||
42 | /** | |
43 | * hppb_probe - Determine if the hppb driver should claim this device. | |
44 | * @dev: The device which has been found | |
45 | * | |
46 | * Determine if hppb driver should claim this chip (return 0) or not | |
47 | * (return 1). If so, initialize the chip and tell other partners in crime | |
48 | * they have work to do. | |
49 | */ | |
cfe4fbfb | 50 | static int __init hppb_probe(struct parisc_device *dev) |
1da177e4 LT |
51 | { |
52 | int status; | |
53 | struct hppb_card *card = &hppb_card_head; | |
54 | ||
55 | while(card->next) { | |
56 | card = card->next; | |
57 | } | |
58 | ||
59 | if(card->hpa) { | |
cb6fc18e | 60 | card->next = kzalloc(sizeof(struct hppb_card), GFP_KERNEL); |
1da177e4 LT |
61 | if(!card->next) { |
62 | printk(KERN_ERR "HP-PB: Unable to allocate memory.\n"); | |
63 | return 1; | |
64 | } | |
1da177e4 LT |
65 | card = card->next; |
66 | } | |
cae5a39f HD |
67 | printk(KERN_INFO "Found GeckoBoa at 0x%llx\n", |
68 | (unsigned long long) dev->hpa.start); | |
1da177e4 | 69 | |
53f01bba | 70 | card->hpa = dev->hpa.start; |
1da177e4 LT |
71 | card->mmio_region.name = "HP-PB Bus"; |
72 | card->mmio_region.flags = IORESOURCE_MEM; | |
73 | ||
53f01bba MW |
74 | card->mmio_region.start = gsc_readl(dev->hpa.start + IO_IO_LOW); |
75 | card->mmio_region.end = gsc_readl(dev->hpa.start + IO_IO_HIGH) - 1; | |
1da177e4 LT |
76 | |
77 | status = ccio_request_resource(dev, &card->mmio_region); | |
78 | if(status < 0) { | |
3fad9b8d JP |
79 | printk(KERN_ERR "%s: failed to claim HP-PB bus space (%pR)\n", |
80 | __FILE__, &card->mmio_region); | |
1da177e4 LT |
81 | } |
82 | ||
83 | return 0; | |
84 | } | |
85 | ||
cfe4fbfb | 86 | static const struct parisc_device_id hppb_tbl[] __initconst = { |
075b8783 RB |
87 | { HPHW_BCPORT, HVERSION_REV_ANY_ID, 0x500, 0xc }, /* E25 and K */ |
88 | { HPHW_BCPORT, 0x0, 0x501, 0xc }, /* E35 */ | |
89 | { HPHW_BCPORT, 0x0, 0x502, 0xc }, /* E45 */ | |
90 | { HPHW_BCPORT, 0x0, 0x503, 0xc }, /* E55 */ | |
1da177e4 LT |
91 | { 0, } |
92 | }; | |
93 | ||
cfe4fbfb | 94 | static struct parisc_driver hppb_driver __refdata = { |
bdad1f83 | 95 | .name = "gecko_boa", |
1da177e4 LT |
96 | .id_table = hppb_tbl, |
97 | .probe = hppb_probe, | |
98 | }; | |
99 | ||
100 | /** | |
4f63ba17 | 101 | * hppb_init - HP-PB bus initialization procedure. |
1da177e4 LT |
102 | * |
103 | * Register this driver. | |
104 | */ | |
105 | void __init hppb_init(void) | |
106 | { | |
107 | register_parisc_driver(&hppb_driver); | |
108 | } |