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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * Copyright (c) 2011 The Chromium OS Authors.
- * (C) Copyright 2008,2009
- * Graeme Russ, <graeme.russ@gmail.com>
- *
- * (C) Copyright 2002
- * Daniel Engström, Omicron Ceti AB, <daniel@omicron.se>
- */
- #include <common.h>
- #include <dm.h>
- #include <errno.h>
- #include <log.h>
- #include <malloc.h>
- #include <pci.h>
- #include <asm/io.h>
- #include <asm/pci.h>
- int pci_x86_read_config(pci_dev_t bdf, uint offset, ulong *valuep,
- enum pci_size_t size)
- {
- outl(bdf | (offset & 0xfc) | PCI_CFG_EN, PCI_REG_ADDR);
- switch (size) {
- case PCI_SIZE_8:
- *valuep = inb(PCI_REG_DATA + (offset & 3));
- break;
- case PCI_SIZE_16:
- *valuep = inw(PCI_REG_DATA + (offset & 2));
- break;
- case PCI_SIZE_32:
- *valuep = inl(PCI_REG_DATA);
- break;
- }
- return 0;
- }
- int pci_x86_write_config(pci_dev_t bdf, uint offset, ulong value,
- enum pci_size_t size)
- {
- outl(bdf | (offset & 0xfc) | PCI_CFG_EN, PCI_REG_ADDR);
- switch (size) {
- case PCI_SIZE_8:
- outb(value, PCI_REG_DATA + (offset & 3));
- break;
- case PCI_SIZE_16:
- outw(value, PCI_REG_DATA + (offset & 2));
- break;
- case PCI_SIZE_32:
- outl(value, PCI_REG_DATA);
- break;
- }
- return 0;
- }
- int pci_x86_clrset_config(pci_dev_t bdf, uint offset, ulong clr, ulong set,
- enum pci_size_t size)
- {
- ulong value;
- int ret;
- ret = pci_x86_read_config(bdf, offset, &value, size);
- if (ret)
- return ret;
- value &= ~clr;
- value |= set;
- return pci_x86_write_config(bdf, offset, value, size);
- }
- void pci_assign_irqs(int bus, int device, u8 irq[4])
- {
- pci_dev_t bdf;
- int func;
- u16 vendor;
- u8 pin, line;
- for (func = 0; func < 8; func++) {
- bdf = PCI_BDF(bus, device, func);
- pci_read_config16(bdf, PCI_VENDOR_ID, &vendor);
- if (vendor == 0xffff || vendor == 0x0000)
- continue;
- pci_read_config8(bdf, PCI_INTERRUPT_PIN, &pin);
- /* PCI spec says all values except 1..4 are reserved */
- if ((pin < 1) || (pin > 4))
- continue;
- line = irq[pin - 1];
- if (!line)
- continue;
- debug("Assigning IRQ %d to PCI device %d.%x.%d (INT%c)\n",
- line, bus, device, func, 'A' + pin - 1);
- pci_write_config8(bdf, PCI_INTERRUPT_LINE, line);
- }
- }
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