/* * support.c - standard functions for the use of pnp protocol drivers * * Copyright 2003 Adam Belay <ambx1@neo.rr.com> */ #include <linux/module.h> #include <linux/ctype.h> #include <linux/pnp.h> #include "base.h" /** * pnp_is_active - Determines if a device is active based on its current * resources * @dev: pointer to the desired PnP device */ int pnp_is_active(struct pnp_dev *dev) { if (!pnp_port_start(dev, 0) && pnp_port_len(dev, 0) <= 1 && !pnp_mem_start(dev, 0) && pnp_mem_len(dev, 0) <= 1 && pnp_irq(dev, 0) == -1 && pnp_dma(dev, 0) == -1) return 0; else return 1; } EXPORT_SYMBOL(pnp_is_active); /* * Functionally similar to acpi_ex_eisa_id_to_string(), but that's * buried in the ACPI CA, and we can't depend on it being present. */ void pnp_eisa_id_to_string(u32 id, char *str) { id = be32_to_cpu(id); /* * According to the specs, the first three characters are five-bit * compressed ASCII, and the left-over high order bit should be zero. * However, the Linux ISAPNP code historically used six bits for the * first character, and there seem to be IDs that depend on that, * e.g., "nEC8241" in the Linux 8250_pnp serial driver and the * FreeBSD sys/pc98/cbus/sio_cbus.c driver. */ str[0] = 'A' + ((id >> 26) & 0x3f) - 1; str[1] = 'A' + ((id >> 21) & 0x1f) - 1; str[2] = 'A' + ((id >> 16) & 0x1f) - 1; str[3] = hex_asc((id >> 12) & 0xf); str[4] = hex_asc((id >> 8) & 0xf); str[5] = hex_asc((id >> 4) & 0xf); str[6] = hex_asc((id >> 0) & 0xf); str[7] = '\0'; } void dbg_pnp_show_resources(struct pnp_dev *dev, char *desc) { #ifdef DEBUG struct resource *res; int i; dev_dbg(&dev->dev, "current resources: %s\n", desc); for (i = 0; i < PNP_MAX_IRQ; i++) { res = pnp_get_resource(dev, IORESOURCE_IRQ, i); if (res && !(res->flags & IORESOURCE_UNSET)) dev_dbg(&dev->dev, " irq %lld flags %#lx\n", (unsigned long long) res->start, res->flags); } for (i = 0; i < PNP_MAX_DMA; i++) { res = pnp_get_resource(dev, IORESOURCE_DMA, i); if (res && !(res->flags & IORESOURCE_UNSET)) dev_dbg(&dev->dev, " dma %lld flags %#lx\n", (unsigned long long) res->start, res->flags); } for (i = 0; i < PNP_MAX_PORT; i++) { res = pnp_get_resource(dev, IORESOURCE_IO, i); if (res && !(res->flags & IORESOURCE_UNSET)) dev_dbg(&dev->dev, " io %#llx-%#llx flags %#lx\n", (unsigned long long) res->start, (unsigned long long) res->end, res->flags); } for (i = 0; i < PNP_MAX_MEM; i++) { res = pnp_get_resource(dev, IORESOURCE_MEM, i); if (res && !(res->flags & IORESOURCE_UNSET)) dev_dbg(&dev->dev, " mem %#llx-%#llx flags %#lx\n", (unsigned long long) res->start, (unsigned long long) res->end, res->flags); } #endif }