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 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