[ACPI] enable PNPACPI support for resource types used by HP serial ports
PNPACPI complained about and ignored devices with ADDRESS16, ADDRESS32, or
ADDRESS64 descriptors in _PRS. HP firmware uses them for built-in serial
ports, so this patch adds support for parsing these descriptors from _PRS.
Note that this does not add the corresponding support for encoding them in
preparation for _SRS, because I don't have any machine that supports _SRS
on these descriptors, so I couldn't test that support. Attempts to encode
them will cause a warning and an -EINVAL return.
http://sourceforge.net/mailarchive/forum.php?thread_id=8250154&forum_id=6102
Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/pnp/pnpacpi/rsparser.c b/drivers/pnp/pnpacpi/rsparser.c
index 416d30d..2424bd3 100644
--- a/drivers/pnp/pnpacpi/rsparser.c
+++ b/drivers/pnp/pnpacpi/rsparser.c
@@ -453,6 +453,45 @@
return;
}
+static void
+pnpacpi_parse_address_option(struct pnp_option *option, struct acpi_resource *r)
+{
+ struct acpi_resource_address64 addr, *p = &addr;
+ acpi_status status;
+ struct pnp_mem * mem;
+ struct pnp_port * port;
+
+ status = acpi_resource_to_address64(r, p);
+ if (!ACPI_SUCCESS(status)) {
+ pnp_warn("PnPACPI: failed to convert resource type %d", r->id);
+ return;
+ }
+
+ if (p->address_length == 0)
+ return;
+
+ if (p->resource_type == ACPI_MEMORY_RANGE) {
+ mem = kcalloc(1, sizeof(struct pnp_mem), GFP_KERNEL);
+ if (!mem)
+ return;
+ mem->min = mem->max = p->min_address_range;
+ mem->size = p->address_length;
+ mem->align = 0;
+ mem->flags = (p->attribute.memory.read_write_attribute ==
+ ACPI_READ_WRITE_MEMORY) ? IORESOURCE_MEM_WRITEABLE : 0;
+ pnp_register_mem_resource(option,mem);
+ } else if (p->resource_type == ACPI_IO_RANGE) {
+ port = kcalloc(1, sizeof(struct pnp_port), GFP_KERNEL);
+ if (!port)
+ return;
+ port->min = port->max = p->min_address_range;
+ port->size = p->address_length;
+ port->align = 0;
+ port->flags = PNP_PORT_FLAG_FIXED;
+ pnp_register_port_resource(option,port);
+ }
+}
+
struct acpipnp_parse_option_s {
struct pnp_option *option;
struct pnp_option *option_independent;
@@ -495,6 +534,11 @@
pnpacpi_parse_fixed_mem32_option(option,
&res->data.fixed_memory32);
break;
+ case ACPI_RSTYPE_ADDRESS16:
+ case ACPI_RSTYPE_ADDRESS32:
+ case ACPI_RSTYPE_ADDRESS64:
+ pnpacpi_parse_address_option(option, res);
+ break;
case ACPI_RSTYPE_START_DPF:
switch (res->data.start_dpf.compatibility_priority) {
case ACPI_GOOD_CONFIGURATION:
@@ -568,11 +612,9 @@
case ACPI_RSTYPE_MEM24:
case ACPI_RSTYPE_MEM32:
case ACPI_RSTYPE_FIXED_MEM32:
-#if 0
case ACPI_RSTYPE_ADDRESS16:
case ACPI_RSTYPE_ADDRESS32:
case ACPI_RSTYPE_ADDRESS64:
-#endif
(*res_cnt) ++;
default:
return AE_OK;
@@ -593,11 +635,9 @@
case ACPI_RSTYPE_MEM24:
case ACPI_RSTYPE_MEM32:
case ACPI_RSTYPE_FIXED_MEM32:
-#if 0
case ACPI_RSTYPE_ADDRESS16:
case ACPI_RSTYPE_ADDRESS32:
case ACPI_RSTYPE_ADDRESS64:
-#endif
(*resource)->id = res->id;
(*resource)++;
default: