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