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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | ** hppb.c: | |
4 | ** HP-PB bus driver for the NOVA and K-Class systems. | |
5 | ** | |
6 | ** (c) Copyright 2002 Ryan Bradetich | |
7 | ** (c) Copyright 2002 Hewlett-Packard Company | |
8 | ** | |
1da177e4 | 9 | ** |
1da177e4 LT |
10 | */ |
11 | ||
12 | #include <linux/types.h> | |
13 | #include <linux/init.h> | |
14 | #include <linux/mm.h> | |
15 | #include <linux/slab.h> | |
bec85e80 | 16 | #include <linux/dma-mapping.h> |
1da177e4 LT |
17 | #include <linux/ioport.h> |
18 | ||
19 | #include <asm/io.h> | |
20 | #include <asm/hardware.h> | |
21 | #include <asm/parisc-device.h> | |
22 | ||
9b8eeab0 CH |
23 | #include "iommu.h" |
24 | ||
1da177e4 LT |
25 | struct hppb_card { |
26 | unsigned long hpa; | |
27 | struct resource mmio_region; | |
28 | struct hppb_card *next; | |
29 | }; | |
30 | ||
df8e5bc6 | 31 | static struct hppb_card hppb_card_head = { |
1da177e4 LT |
32 | .hpa = 0, |
33 | .next = NULL, | |
34 | }; | |
35 | ||
36 | #define IO_IO_LOW offsetof(struct bc_module, io_io_low) | |
37 | #define IO_IO_HIGH offsetof(struct bc_module, io_io_high) | |
38 | ||
39 | /** | |
40 | * hppb_probe - Determine if the hppb driver should claim this device. | |
41 | * @dev: The device which has been found | |
42 | * | |
43 | * Determine if hppb driver should claim this chip (return 0) or not | |
44 | * (return 1). If so, initialize the chip and tell other partners in crime | |
45 | * they have work to do. | |
46 | */ | |
cfe4fbfb | 47 | static int __init hppb_probe(struct parisc_device *dev) |
1da177e4 LT |
48 | { |
49 | int status; | |
50 | struct hppb_card *card = &hppb_card_head; | |
51 | ||
52 | while(card->next) { | |
53 | card = card->next; | |
54 | } | |
55 | ||
56 | if(card->hpa) { | |
cb6fc18e | 57 | card->next = kzalloc(sizeof(struct hppb_card), GFP_KERNEL); |
1da177e4 LT |
58 | if(!card->next) { |
59 | printk(KERN_ERR "HP-PB: Unable to allocate memory.\n"); | |
60 | return 1; | |
61 | } | |
1da177e4 LT |
62 | card = card->next; |
63 | } | |
1da177e4 | 64 | |
53f01bba | 65 | card->hpa = dev->hpa.start; |
1da177e4 LT |
66 | card->mmio_region.name = "HP-PB Bus"; |
67 | card->mmio_region.flags = IORESOURCE_MEM; | |
68 | ||
53f01bba MW |
69 | card->mmio_region.start = gsc_readl(dev->hpa.start + IO_IO_LOW); |
70 | card->mmio_region.end = gsc_readl(dev->hpa.start + IO_IO_HIGH) - 1; | |
1da177e4 LT |
71 | |
72 | status = ccio_request_resource(dev, &card->mmio_region); | |
4ccac58e HD |
73 | |
74 | pr_info("Found GeckoBoa at %pap, bus space %pR,%s claimed.\n", | |
75 | &dev->hpa.start, | |
76 | &card->mmio_region, | |
77 | (status < 0) ? " not":"" ); | |
1da177e4 LT |
78 | |
79 | return 0; | |
80 | } | |
81 | ||
cfe4fbfb | 82 | static const struct parisc_device_id hppb_tbl[] __initconst = { |
075b8783 RB |
83 | { HPHW_BCPORT, HVERSION_REV_ANY_ID, 0x500, 0xc }, /* E25 and K */ |
84 | { HPHW_BCPORT, 0x0, 0x501, 0xc }, /* E35 */ | |
85 | { HPHW_BCPORT, 0x0, 0x502, 0xc }, /* E45 */ | |
86 | { HPHW_BCPORT, 0x0, 0x503, 0xc }, /* E55 */ | |
1da177e4 LT |
87 | { 0, } |
88 | }; | |
89 | ||
cfe4fbfb | 90 | static struct parisc_driver hppb_driver __refdata = { |
bdad1f83 | 91 | .name = "gecko_boa", |
1da177e4 LT |
92 | .id_table = hppb_tbl, |
93 | .probe = hppb_probe, | |
94 | }; | |
95 | ||
96 | /** | |
4f63ba17 | 97 | * hppb_init - HP-PB bus initialization procedure. |
1da177e4 LT |
98 | * |
99 | * Register this driver. | |
100 | */ | |
101 | void __init hppb_init(void) | |
102 | { | |
103 | register_parisc_driver(&hppb_driver); | |
104 | } |