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dm: pci: Provide friendly config access functions

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At present there are no PCI functions which allow access to PCI
configuration using a struct udevice. This is a sad situation for driver
model as it makes use of PCI harder. Add these functions.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Simon Glass
2015-08-10 07:05:03 -06:00
parent da60fb7934
commit 66afb4ed92
2 changed files with 94 additions and 0 deletions
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18
include/pci.h
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@@ -988,6 +988,24 @@ int pci_bus_read_config(struct udevice *bus, pci_dev_t bdf, int offset,
int pci_bus_write_config(struct udevice *bus, pci_dev_t bdf, int offset,
unsigned long value, enum pci_size_t size);
/**
* Driver model PCI config access functions. Use these in preference to others
* when you have a valid device
*/
int dm_pci_read_config(struct udevice *dev, int offset, unsigned long *valuep,
enum pci_size_t size);
int dm_pci_read_config8(struct udevice *dev, int offset, u8 *valuep);
int dm_pci_read_config16(struct udevice *dev, int offset, u16 *valuep);
int dm_pci_read_config32(struct udevice *dev, int offset, u32 *valuep);
int dm_pci_write_config(struct udevice *dev, int offset, unsigned long value,
enum pci_size_t size);
int dm_pci_write_config8(struct udevice *dev, int offset, u8 value);
int dm_pci_write_config16(struct udevice *dev, int offset, u16 value);
int dm_pci_write_config32(struct udevice *dev, int offset, u32 value);
/*
* The following functions provide access to the above without needing the
* size parameter. We are trying to encourage the use of the 8/16/32-style