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
serial8250_pci_setup_port(struct pci_dev * dev,struct uart_8250_port * port,u8 bar,unsigned int offset,int regshift)15 int 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 }
39 EXPORT_SYMBOL_NS_GPL(serial8250_pci_setup_port, SERIAL_8250_PCI);
40 MODULE_LICENSE("GPL");
41