/** * 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)
{ /* * I don't think this is very reliable because pnp_disable_dev() * only clears out auto-assigned resources.
*/ 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_hi(id >> 8);
str[4] = hex_asc_lo(id >> 8);
str[5] = hex_asc_hi(id);
str[6] = hex_asc_lo(id);
str[7] = '\0';
}
char *pnp_resource_type_name(struct resource *res)
{ switch (pnp_resource_type(res)) { case IORESOURCE_IO: return"io"; case IORESOURCE_MEM: return"mem"; case IORESOURCE_IRQ: return"irq"; case IORESOURCE_DMA: return"dma"; case IORESOURCE_BUS: return"bus";
} return"unknown";
}
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