91 lines
2.6 KiB
C
91 lines
2.6 KiB
C
/*
|
|
* 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_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';
|
|
}
|
|
|
|
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
|
|
}
|