projects / linux.git / blame
| 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 <[email protected]> | |
| 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 LT |
18 | { |
| 19 | if (!pnp_port_start(dev, 0) && pnp_port_len(dev, 0) <= 1 && | |
| 20 | !pnp_mem_start(dev, 0) && pnp_mem_len(dev, 0) <= 1 && | |
| 9dd78466 BH |
21 | pnp_irq(dev, 0) == -1 && pnp_dma(dev, 0) == -1) |
| 22 | return 0; | |
| 1da177e4 LT |
23 | else |
| 24 | return 1; | |
| 25 | } | |
| 26 | ||
| 1da177e4 | 27 | EXPORT_SYMBOL(pnp_is_active); |
| 25eb8461 BH |
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; | |
| 3fc95772 HH |
48 | str[3] = hex_asc_hi(id >> 8); |
| 49 | str[4] = hex_asc_lo(id >> 8); | |
| 50 | str[5] = hex_asc_hi(id); | |
| 51 | str[6] = hex_asc_lo(id); | |
| 25eb8461 BH |
52 | str[7] = '\0'; |
| 53 | } | |
| 81b5c75f BH |
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++) { | |
| f6505fef BH |
64 | res = pnp_get_resource(dev, IORESOURCE_IRQ, i); |
| 65 | if (res && !(res->flags & IORESOURCE_UNSET)) | |
| 81b5c75f BH |
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++) { | |
| f6505fef BH |
70 | res = pnp_get_resource(dev, IORESOURCE_DMA, i); |
| 71 | if (res && !(res->flags & IORESOURCE_UNSET)) | |
| 81b5c75f BH |
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++) { | |
| f6505fef BH |
76 | res = pnp_get_resource(dev, IORESOURCE_IO, i); |
| 77 | if (res && !(res->flags & IORESOURCE_UNSET)) | |
| 81b5c75f BH |
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++) { | |
| f6505fef BH |
83 | res = pnp_get_resource(dev, IORESOURCE_MEM, i); |
| 84 | if (res && !(res->flags & IORESOURCE_UNSET)) | |
| 81b5c75f BH |
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 | } |