Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
07d4e9af | 2 | * support.c - standard functions for the use of pnp protocol drivers |
1da177e4 LT |
3 | * |
4 | * Copyright 2003 Adam Belay <ambx1@neo.rr.com> | |
1da177e4 LT |
5 | */ |
6 | ||
1da177e4 LT |
7 | #include <linux/module.h> |
8 | #include <linux/ctype.h> | |
1da177e4 LT |
9 | #include <linux/pnp.h> |
10 | #include "base.h" | |
11 | ||
12 | /** | |
07d4e9af BH |
13 | * pnp_is_active - Determines if a device is active based on its current |
14 | * resources | |
1da177e4 | 15 | * @dev: pointer to the desired PnP device |
1da177e4 | 16 | */ |
9dd78466 | 17 | int pnp_is_active(struct pnp_dev *dev) |
1da177e4 | 18 | { |
aee3ad81 BH |
19 | /* |
20 | * I don't think this is very reliable because pnp_disable_dev() | |
21 | * only clears out auto-assigned resources. | |
22 | */ | |
1da177e4 LT |
23 | if (!pnp_port_start(dev, 0) && pnp_port_len(dev, 0) <= 1 && |
24 | !pnp_mem_start(dev, 0) && pnp_mem_len(dev, 0) <= 1 && | |
9dd78466 BH |
25 | pnp_irq(dev, 0) == -1 && pnp_dma(dev, 0) == -1) |
26 | return 0; | |
1da177e4 LT |
27 | else |
28 | return 1; | |
29 | } | |
30 | ||
1da177e4 | 31 | EXPORT_SYMBOL(pnp_is_active); |
25eb8461 BH |
32 | |
33 | /* | |
34 | * Functionally similar to acpi_ex_eisa_id_to_string(), but that's | |
35 | * buried in the ACPI CA, and we can't depend on it being present. | |
36 | */ | |
37 | void pnp_eisa_id_to_string(u32 id, char *str) | |
38 | { | |
39 | id = be32_to_cpu(id); | |
40 | ||
41 | /* | |
42 | * According to the specs, the first three characters are five-bit | |
43 | * compressed ASCII, and the left-over high order bit should be zero. | |
44 | * However, the Linux ISAPNP code historically used six bits for the | |
45 | * first character, and there seem to be IDs that depend on that, | |
46 | * e.g., "nEC8241" in the Linux 8250_pnp serial driver and the | |
47 | * FreeBSD sys/pc98/cbus/sio_cbus.c driver. | |
48 | */ | |
49 | str[0] = 'A' + ((id >> 26) & 0x3f) - 1; | |
50 | str[1] = 'A' + ((id >> 21) & 0x1f) - 1; | |
51 | str[2] = 'A' + ((id >> 16) & 0x1f) - 1; | |
3fc95772 HH |
52 | str[3] = hex_asc_hi(id >> 8); |
53 | str[4] = hex_asc_lo(id >> 8); | |
54 | str[5] = hex_asc_hi(id); | |
55 | str[6] = hex_asc_lo(id); | |
25eb8461 BH |
56 | str[7] = '\0'; |
57 | } | |
81b5c75f | 58 | |
9fdee4e0 BH |
59 | char *pnp_resource_type_name(struct resource *res) |
60 | { | |
61 | switch (pnp_resource_type(res)) { | |
62 | case IORESOURCE_IO: | |
63 | return "io"; | |
64 | case IORESOURCE_MEM: | |
65 | return "mem"; | |
66 | case IORESOURCE_IRQ: | |
67 | return "irq"; | |
68 | case IORESOURCE_DMA: | |
69 | return "dma"; | |
70 | } | |
71 | return NULL; | |
72 | } | |
73 | ||
81b5c75f BH |
74 | void dbg_pnp_show_resources(struct pnp_dev *dev, char *desc) |
75 | { | |
76 | #ifdef DEBUG | |
aee3ad81 BH |
77 | char buf[128]; |
78 | int len = 0; | |
79 | struct pnp_resource *pnp_res; | |
81b5c75f | 80 | struct resource *res; |
81b5c75f | 81 | |
819beac3 BH |
82 | if (list_empty(&dev->resources)) { |
83 | dev_dbg(&dev->dev, "%s: no current resources\n", desc); | |
84 | return; | |
85 | } | |
86 | ||
87 | dev_dbg(&dev->dev, "%s: current resources:\n", desc); | |
aee3ad81 BH |
88 | list_for_each_entry(pnp_res, &dev->resources, list) { |
89 | res = &pnp_res->res; | |
81b5c75f | 90 | |
aee3ad81 BH |
91 | len += snprintf(buf + len, sizeof(buf) - len, " %-3s ", |
92 | pnp_resource_type_name(res)); | |
93 | ||
94 | if (res->flags & IORESOURCE_DISABLED) { | |
95 | dev_dbg(&dev->dev, "%sdisabled\n", buf); | |
96 | continue; | |
97 | } | |
98 | ||
99 | switch (pnp_resource_type(res)) { | |
100 | case IORESOURCE_IO: | |
101 | case IORESOURCE_MEM: | |
102 | len += snprintf(buf + len, sizeof(buf) - len, | |
103 | "%#llx-%#llx flags %#lx", | |
104 | (unsigned long long) res->start, | |
105 | (unsigned long long) res->end, | |
106 | res->flags); | |
107 | break; | |
108 | case IORESOURCE_IRQ: | |
109 | case IORESOURCE_DMA: | |
110 | len += snprintf(buf + len, sizeof(buf) - len, | |
111 | "%lld flags %#lx", | |
112 | (unsigned long long) res->start, | |
113 | res->flags); | |
114 | break; | |
115 | } | |
116 | dev_dbg(&dev->dev, "%s\n", buf); | |
81b5c75f BH |
117 | } |
118 | #endif | |
119 | } |