diff options
Diffstat (limited to 'drivers/pnp/support.c')
-rw-r--r-- | drivers/pnp/support.c | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/drivers/pnp/support.c b/drivers/pnp/support.c index 13c608f5fb30..3eba85ed729c 100644 --- a/drivers/pnp/support.c +++ b/drivers/pnp/support.c | |||
@@ -25,3 +25,66 @@ int pnp_is_active(struct pnp_dev *dev) | |||
25 | } | 25 | } |
26 | 26 | ||
27 | EXPORT_SYMBOL(pnp_is_active); | 27 | EXPORT_SYMBOL(pnp_is_active); |
28 | |||
29 | /* | ||
30 | * Functionally similar to acpi_ex_eisa_id_to_string(), but that's | ||
31 | * buried in the ACPI CA, and we can't depend on it being present. | ||
32 | */ | ||
33 | void pnp_eisa_id_to_string(u32 id, char *str) | ||
34 | { | ||
35 | id = be32_to_cpu(id); | ||
36 | |||
37 | /* | ||
38 | * According to the specs, the first three characters are five-bit | ||
39 | * compressed ASCII, and the left-over high order bit should be zero. | ||
40 | * However, the Linux ISAPNP code historically used six bits for the | ||
41 | * first character, and there seem to be IDs that depend on that, | ||
42 | * e.g., "nEC8241" in the Linux 8250_pnp serial driver and the | ||
43 | * FreeBSD sys/pc98/cbus/sio_cbus.c driver. | ||
44 | */ | ||
45 | str[0] = 'A' + ((id >> 26) & 0x3f) - 1; | ||
46 | str[1] = 'A' + ((id >> 21) & 0x1f) - 1; | ||
47 | str[2] = 'A' + ((id >> 16) & 0x1f) - 1; | ||
48 | str[3] = hex_asc((id >> 12) & 0xf); | ||
49 | str[4] = hex_asc((id >> 8) & 0xf); | ||
50 | str[5] = hex_asc((id >> 4) & 0xf); | ||
51 | str[6] = hex_asc((id >> 0) & 0xf); | ||
52 | str[7] = '\0'; | ||
53 | } | ||
54 | |||
55 | void dbg_pnp_show_resources(struct pnp_dev *dev, char *desc) | ||
56 | { | ||
57 | #ifdef DEBUG | ||
58 | struct resource *res; | ||
59 | int i; | ||
60 | |||
61 | dev_dbg(&dev->dev, "current resources: %s\n", desc); | ||
62 | |||
63 | for (i = 0; i < PNP_MAX_IRQ; i++) { | ||
64 | res = pnp_get_resource(dev, IORESOURCE_IRQ, i); | ||
65 | if (res && !(res->flags & IORESOURCE_UNSET)) | ||
66 | dev_dbg(&dev->dev, " irq %lld flags %#lx\n", | ||
67 | (unsigned long long) res->start, res->flags); | ||
68 | } | ||
69 | for (i = 0; i < PNP_MAX_DMA; i++) { | ||
70 | res = pnp_get_resource(dev, IORESOURCE_DMA, i); | ||
71 | if (res && !(res->flags & IORESOURCE_UNSET)) | ||
72 | dev_dbg(&dev->dev, " dma %lld flags %#lx\n", | ||
73 | (unsigned long long) res->start, res->flags); | ||
74 | } | ||
75 | for (i = 0; i < PNP_MAX_PORT; i++) { | ||
76 | res = pnp_get_resource(dev, IORESOURCE_IO, i); | ||
77 | if (res && !(res->flags & IORESOURCE_UNSET)) | ||
78 | dev_dbg(&dev->dev, " io %#llx-%#llx flags %#lx\n", | ||
79 | (unsigned long long) res->start, | ||
80 | (unsigned long long) res->end, res->flags); | ||
81 | } | ||
82 | for (i = 0; i < PNP_MAX_MEM; i++) { | ||
83 | res = pnp_get_resource(dev, IORESOURCE_MEM, i); | ||
84 | if (res && !(res->flags & IORESOURCE_UNSET)) | ||
85 | dev_dbg(&dev->dev, " mem %#llx-%#llx flags %#lx\n", | ||
86 | (unsigned long long) res->start, | ||
87 | (unsigned long long) res->end, res->flags); | ||
88 | } | ||
89 | #endif | ||
90 | } | ||