57 lines
1.6 KiB
C
57 lines
1.6 KiB
C
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/*
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* This file is part of the coreboot project.
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*
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* Copyright (C) 2015 Intel Corp.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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/*
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* The sole purpose of this driver is to avoid BAR to be changed during
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* resource allocation. Since configuration space is just 32 bytes it
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* shouldn't cause any fragmentation.
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*/
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#include <console/uart.h>
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#include <device/device.h>
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#include <device/pci.h>
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#include <device/pci_ids.h>
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#include <soc/pci_ids.h>
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#include <soc/pci_devs.h>
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static void aplk_uart_read_resources(struct device *dev)
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{
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pci_dev_read_resources(dev);
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if ((IS_ENABLED(CONFIG_SOC_UART_DEBUG) &&
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dev->path.pci.devfn == _LPSS_PCI_DEVFN(UART,
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CONFIG_UART_FOR_CONSOLE))) {
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/* will override existing resource. */
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fixed_mem_resource(dev, PCI_BASE_ADDRESS_0,
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CONFIG_CONSOLE_UART_BASE_ADDRESS >> 10, 4, 0);
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}
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}
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static struct device_operations uart_ops = {
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.read_resources = aplk_uart_read_resources,
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.set_resources = DEVICE_NOOP,
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.enable_resources = DEVICE_NOOP,
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.init = pci_dev_init,
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.enable = DEVICE_NOOP
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};
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static const unsigned short uart_ids[] = {
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PCI_DEVICE_ID_APOLLOLAKE_UART0, PCI_DEVICE_ID_APOLLOLAKE_UART1,
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PCI_DEVICE_ID_APOLLOLAKE_UART2, PCI_DEVICE_ID_APOLLOLAKE_UART3,
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0
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};
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static const struct pci_driver uart_driver __pci_driver = {
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.ops = &uart_ops,
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.vendor = PCI_VENDOR_ID_INTEL,
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.devices = uart_ids
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};
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