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e46d00c77c
At present the x86 pre-DM equivalent of pci_bus_clrset_config32() does not exist. Add it to simplify PCI init code on x86. Also add the missing functions to this header. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
82 lines
2.4 KiB
C
82 lines
2.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* (C) Copyright 2002
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* Daniel Engström, Omicron Ceti AB, daniel@omicron.se
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*/
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#ifndef _PCI_I386_H_
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#define _PCI_I386_H_
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#include <pci.h>
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/* bus mapping constants (used for PCI core initialization) */
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#define PCI_REG_ADDR 0xcf8
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#define PCI_REG_DATA 0xcfc
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#define PCI_CFG_EN 0x80000000
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#ifndef __ASSEMBLY__
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/**
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* pci_x86_read_config() - Read a configuration value from a device
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*
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* This function can be called before PCI is set up in driver model.
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*
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* @bus: Bus to read from (ignored, can be NULL)
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* @bdf: PCI device address: bus, device and function -see PCI_BDF()
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* @offset: Register offset to read
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* @valuep: Place to put the returned value
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* @size: Access size
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* @return 0 if OK, -ve on error
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*/
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int pci_x86_read_config(struct udevice *bus, pci_dev_t bdf, uint offset,
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ulong *valuep, enum pci_size_t size);
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/**
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* pci_bus_write_config() - Write a configuration value to a device
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*
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* This function can be called before PCI is set up in driver model.
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*
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* @bus: Bus to read from (ignored, can be NULL)
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* @bdf: PCI device address: bus, device and function -see PCI_BDF()
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* @offset: Register offset to write
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* @value: Value to write
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* @size: Access size
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* @return 0 if OK, -ve on error
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*/
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int pci_x86_write_config(struct udevice *bus, pci_dev_t bdf, uint offset,
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ulong value, enum pci_size_t size);
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/**
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* pci_bus_clrset_config32() - Update a configuration value for a device
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*
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* The register at @offset is updated to (oldvalue & ~clr) | set. This function
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* can be called before PCI is set up in driver model.
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*
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* @bus: Bus to read from (ignored, can be NULL)
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* @bdf: PCI device address: bus, device and function -see PCI_BDF()
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* @offset: Register offset to update
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* @clr: Bits to clear
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* @set: Bits to set
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* @return 0 if OK, -ve on error
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*/
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int pci_x86_clrset_config(struct udevice *bus, pci_dev_t bdf, uint offset,
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ulong clr, ulong set, enum pci_size_t size);
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/**
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* Assign IRQ number to a PCI device
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*
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* This function assigns IRQ for a PCI device. If the device does not exist
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* or does not require interrupts then this function has no effect.
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*
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* @bus: PCI bus number
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* @device: PCI device number
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* @irq: An array of IRQ numbers that are assigned to INTA through
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* INTD of this PCI device.
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*/
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void pci_assign_irqs(int bus, int device, u8 irq[4]);
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#endif /* __ASSEMBLY__ */
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#endif /* _PCI_I386_H_ */
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