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d678a59d2d
When bringing in the series 'arm: dts: am62-beagleplay: Fix Beagleplay Ethernet"' I failed to notice that b4 noticed it was based on next and so took that as the base commit and merged that part of next to master. This reverts commitc8ffd1356d, reversing changes made to2ee6f3a5f7. Reported-by: Jonas Karlman <jonas@kwiboo.se> Signed-off-by: Tom Rini <trini@konsulko.com>
120 lines
3.0 KiB
C
120 lines
3.0 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* PCI auto-configuration library
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*
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* Author: Matt Porter <mporter@mvista.com>
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*
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* Copyright 2000 MontaVista Software Inc.
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*
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* Modifications for driver model:
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* Copyright 2015 Google, Inc
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* Written by Simon Glass <sjg@chromium.org>
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*/
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#include <common.h>
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#include <dm.h>
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#include <errno.h>
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#include <log.h>
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#include <pci.h>
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void pciauto_region_init(struct pci_region *res)
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{
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/*
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* Avoid allocating PCI resources from address 0 -- this is illegal
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* according to PCI 2.1 and moreover, this is known to cause Linux IDE
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* drivers to fail. Use a reasonable starting value of 0x1000 instead
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* if the bus start address is below 0x1000.
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*/
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res->bus_lower = res->bus_start < 0x1000 ? 0x1000 : res->bus_start;
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}
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void pciauto_region_align(struct pci_region *res, pci_size_t size)
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{
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res->bus_lower = ((res->bus_lower - 1) | (size - 1)) + 1;
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}
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int pciauto_region_allocate(struct pci_region *res, pci_size_t size,
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pci_addr_t *bar, bool supports_64bit)
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{
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pci_addr_t addr;
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if (!res) {
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debug("No resource\n");
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goto error;
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}
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addr = ((res->bus_lower - 1) | (size - 1)) + 1;
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if (addr - res->bus_start + size > res->size) {
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debug("No room in resource, avail start=%llx / size=%llx, "
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"need=%llx\n", (unsigned long long)res->bus_lower,
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(unsigned long long)res->size, (unsigned long long)size);
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goto error;
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}
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if (upper_32_bits(addr) && !supports_64bit) {
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debug("Cannot assign 64-bit address to 32-bit-only resource\n");
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goto error;
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}
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res->bus_lower = addr + size;
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debug("address=0x%llx bus_lower=0x%llx\n", (unsigned long long)addr,
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(unsigned long long)res->bus_lower);
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*bar = addr;
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return 0;
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error:
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*bar = (pci_addr_t)-1;
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return -1;
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}
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static void pciauto_show_region(const char *name, struct pci_region *region)
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{
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pciauto_region_init(region);
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debug("PCI Autoconfig: Bus %s region: [%llx-%llx],\n"
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"\t\tPhysical Memory [%llx-%llx]\n", name,
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(unsigned long long)region->bus_start,
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(unsigned long long)(region->bus_start + region->size - 1),
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(unsigned long long)region->phys_start,
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(unsigned long long)(region->phys_start + region->size - 1));
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}
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void pciauto_config_init(struct pci_controller *hose)
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{
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int i;
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hose->pci_io = NULL;
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hose->pci_mem = NULL;
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hose->pci_prefetch = NULL;
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for (i = 0; i < hose->region_count; i++) {
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switch (hose->regions[i].flags) {
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case PCI_REGION_IO:
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if (!hose->pci_io ||
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hose->pci_io->size < hose->regions[i].size)
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hose->pci_io = hose->regions + i;
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break;
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case PCI_REGION_MEM:
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if (!hose->pci_mem ||
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hose->pci_mem->size < hose->regions[i].size)
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hose->pci_mem = hose->regions + i;
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break;
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case (PCI_REGION_MEM | PCI_REGION_PREFETCH):
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if (!hose->pci_prefetch ||
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hose->pci_prefetch->size < hose->regions[i].size)
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hose->pci_prefetch = hose->regions + i;
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break;
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}
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}
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if (hose->pci_mem)
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pciauto_show_region("Memory", hose->pci_mem);
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if (hose->pci_prefetch)
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pciauto_show_region("Prefetchable Mem", hose->pci_prefetch);
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if (hose->pci_io)
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pciauto_show_region("I/O", hose->pci_io);
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}
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