1// SPDX-License-Identifier: GPL-2.0
2/*
3 * 8250 PCI library.
4 *
5 * Copyright (C) 2001 Russell King, All Rights Reserved.
6 */
7#include <linux/errno.h>
8#include <linux/ioport.h>
9#include <linux/pci.h>
10#include <linux/types.h>
11
12#include "8250.h"
13#include "8250_pcilib.h"
14
15int serial8250_pci_setup_port(struct pci_dev *dev, struct uart_8250_port *port,
16		   u8 bar, unsigned int offset, int regshift)
17{
18	if (bar >= PCI_STD_NUM_BARS)
19		return -EINVAL;
20
21	if (pci_resource_flags(dev, bar) & IORESOURCE_MEM) {
22		if (!pcim_iomap(dev, bar, 0) && !pcim_iomap_table(dev))
23			return -ENOMEM;
24
25		port->port.iotype = UPIO_MEM;
26		port->port.iobase = 0;
27		port->port.mapbase = pci_resource_start(dev, bar) + offset;
28		port->port.membase = pcim_iomap_table(dev)[bar] + offset;
29		port->port.regshift = regshift;
30	} else {
31		port->port.iotype = UPIO_PORT;
32		port->port.iobase = pci_resource_start(dev, bar) + offset;
33		port->port.mapbase = 0;
34		port->port.membase = NULL;
35		port->port.regshift = 0;
36	}
37	return 0;
38}
39EXPORT_SYMBOL_NS_GPL(serial8250_pci_setup_port, SERIAL_8250_PCI);
40MODULE_LICENSE("GPL");
41