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Add support for attaching PnP-aware ISA drivers to ACPI.

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Always parse ACPI device resource settings (current resources only)
and attach the resources to the device before probe/attaching.
This commit is contained in:
Mike Smith 2001-08-30 00:50:58 +00:00
parent 832183ba00
commit bc0f21954b
1 changed files with 74 additions and 1 deletions
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75
sys/dev/acpica/acpi.c
View file

@ -44,9 +44,10 @@
#include <sys/ctype.h>
#include <machine/clock.h>
#include <machine/resource.h>
#include <isa/isavar.h>
#include "acpi.h"
#include <dev/acpica/acpivar.h>
@ -110,6 +111,7 @@ static int acpi_get_resource(device_t dev, device_t child, int type, int rid, u_
static struct resource *acpi_alloc_resource(device_t bus, device_t child, int type, int *rid,
u_long start, u_long end, u_long count, u_int flags);
static int acpi_release_resource(device_t bus, device_t child, int type, int rid, struct resource *r);
static int acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids);
static void acpi_probe_children(device_t bus);
static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status);
@ -147,6 +149,9 @@ static device_method_t acpi_methods[] = {
DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
/* ISA emulation */
DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe),
{0, 0}
};
@ -593,6 +598,60 @@ acpi_release_resource(device_t bus, device_t child, int type, int rid, struct re
return(resource_list_release(rl, bus, child, type, rid, r));
}
/*
* Handle ISA-like devices probing for a PnP ID to match.
*/
#define PNP_EISAID(s) \
((((s[0] - '@') & 0x1f) << 2) \
| (((s[1] - '@') & 0x18) >> 3) \
| (((s[1] - '@') & 0x07) << 13) \
| (((s[2] - '@') & 0x1f) << 8) \
| (PNP_HEXTONUM(s[4]) << 16) \
| (PNP_HEXTONUM(s[3]) << 20) \
| (PNP_HEXTONUM(s[6]) << 24) \
| (PNP_HEXTONUM(s[5]) << 28))
int
acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids)
{
ACPI_HANDLE h;
ACPI_DEVICE_INFO devinfo;
ACPI_STATUS error;
u_int32_t pnpid;
int result;
FUNCTION_TRACE(__func__);
/*
* ISA-style drivers attached to ACPI may persist and
* probe manually if we return ENOENT. We never want
* that to happen, so don't ever return it.
*/
result = ENXIO;
ACPI_LOCK;
/* fetch and validate the HID */
if ((h = acpi_get_handle(child)) == NULL)
goto out;
if ((error = AcpiGetObjectInfo(h, &devinfo)) != AE_OK)
goto out;
if (!(devinfo.Valid & ACPI_VALID_HID))
goto out;
/* scan the supplied IDs for a match */
pnpid = PNP_EISAID(devinfo.HardwareId);
while (ids && ids->ip_id) {
if (pnpid == ids->ip_id) {
result = 0;
goto out;
}
ids++;
}
out:
ACPI_UNLOCK;
return_VALUE(result);
}
/*
* Scan relevant portions of the ACPI namespace and attach child devices.
*
@ -642,6 +701,7 @@ acpi_probe_children(device_t bus)
ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n"));
bus_generic_attach(bus);
ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n"));
return_VOID;
}
@ -677,7 +737,20 @@ acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status)
*/
ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", acpi_name(handle)));
child = BUS_ADD_CHILD(bus, level * 10, NULL, -1);
if (child == NULL)
break;
acpi_set_handle(child, handle);
/*
* Get the device's resource settings and attach them.
* Note that if the device has _PRS but no _CRS, we need
* to decide when it's appropriate to try to configure the
* device. Ignore the return value here; it's OK for the
* device not to have any resources.
*/
acpi_parse_resources(child, handle, &acpi_res_parse_set);
/* if we're debugging, probe/attach now rather than later */
DEBUG_EXEC(device_probe_and_attach(child));
break;
}