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pnp: Implement common handling for PnP config modes

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Many super i/o chips only answer to PnP requests if they are in a
configuration state (sometimes also called ext func mode). To cope with
that, the code of many chips implements its own version of our default
PnP functions like pnp_set_resource(), pnp_enable_resource() etc.

To avoid this code duplication, this patch extends our PnP device
interface with optional functions to enter and exit configuration mode.

Change-Id: I9b7662a0db70ede93276764fa15020f251eb46bd
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: http://review.coreboot.org/3481
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
This commit is contained in:
Nico Huber
2013-06-10 22:08:35 +02:00
committed by Stefan Reinauer
parent f898f7ba4d
commit dd4715b6a5
3 changed files with 34 additions and 0 deletions
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2
src/include/device/device.h
View File

@@ -13,6 +13,7 @@ typedef struct device * device_t;
struct pci_operations;
struct pci_bus_operations;
struct smbus_bus_operations;
struct pnp_mode_ops;
/* Chip operations */
struct chip_operations {
@@ -42,6 +43,7 @@ struct device_operations {
const struct pci_operations *ops_pci;
const struct smbus_bus_operations *ops_smbus_bus;
const struct pci_bus_operations *ops_pci_bus;
const struct pnp_mode_ops *ops_pnp_mode;
};
#endif

7
src/include/device/pnp.h
View File

@@ -52,5 +52,12 @@ struct resource *pnp_get_resource(device_t dev, unsigned index);
void pnp_enable_devices(struct device *dev, struct device_operations *ops,
unsigned int functions, struct pnp_info *info);
struct pnp_mode_ops {
void (*enter_conf_mode)(device_t dev);
void (*exit_conf_mode)(device_t dev);
};
void pnp_enter_conf_mode(device_t dev);
void pnp_exit_conf_mode(device_t dev);
#endif
#endif /* DEVICE_PNP_H */