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Add initialization hook for chips 

Add an init() function to the chip_operations which will be called
before bus enumeration. This allows to disable unused devices before
they get enumerated.

Change-Id: I63dd9cbfc7b5995ccafb7bf7a81dc71fc67906a0
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: http://review.coreboot.org/1623
Tested-by: build bot (Jenkins)
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-by: Marc Jones <marcj303@gmail.com>
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
This commit is contained in:
Nico Huber 2012-07-25 10:33:05 +02:00 committed by Patrick Georgi
parent e820e5cb3a
commit acd7d95251
3 changed files with 28 additions and 1 deletions
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4
src/boot/hardwaremain.c
View File

@ -82,6 +82,10 @@ void hardwaremain(int boot_complete)
init_timer();
timestamp_stash(TS_DEVICE_ENUMERATE);
/* Initialize chips early, they might disable unused devices. */
dev_initialize_chips();
/* Find the devices we don't have hard coded knowledge about. */
dev_enumerate();
post_code(POST_DEVICE_ENUMERATION_COMPLETE);

20
src/devices/device.c
View File

@ -52,6 +52,26 @@ extern struct device *last_dev;
/** Linked list of free resources */
struct resource *free_resources = NULL;
/**
* Initialize all chips of statically known devices.
*
* Will be called before bus enumeration to initialize chips stated in the
* device tree.
*/
void dev_initialize_chips(void)
{
struct device *dev;
for (dev = all_devices; dev; dev = dev->next) {
/* Initialize chip if we haven't yet. */
if (dev->chip_ops && dev->chip_ops->init &&
!dev->chip_ops->initialized) {
dev->chip_ops->init(dev->chip_info);
dev->chip_ops->initialized = 1;
}
}
}
DECLARE_SPIN_LOCK(dev_lock)
#if CONFIG_GFXUMA

5
src/include/device/device.h
View File

@ -16,6 +16,8 @@ struct smbus_bus_operations;
/* Chip operations */
struct chip_operations {
void (*enable_dev)(struct device *dev);
void (*init)(void *chip_info);
unsigned int initialized : 1;
const char *name;
};
@ -100,7 +102,7 @@ struct device {
struct device_operations *ops;
#ifndef __PRE_RAM__
const struct chip_operations *chip_ops;
struct chip_operations *chip_ops;
const char *name;
#endif
ROMSTAGE_CONST void *chip_info;
@ -125,6 +127,7 @@ extern uint64_t uma_memory_size;
/* Generic device interface functions */
device_t alloc_dev(struct bus *parent, struct device_path *path);
void dev_initialize_chips(void);
void dev_enumerate(void);
void dev_configure(void);
void dev_enable(void);