156 lines
4.2 KiB
C
Executable file
156 lines
4.2 KiB
C
Executable file
// SPDX-License-Identifier: GPL-2.0
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/*
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* 8250_moxa.c - MOXA Smartio/Industio MUE multiport serial driver.
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*
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* Author: Mathieu OTHACEHE <m.othacehe@gmail.com>
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*/
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#include <linux/module.h>
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#include <linux/pci.h>
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#include "8250.h"
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#define PCI_DEVICE_ID_MOXA_CP102E 0x1024
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#define PCI_DEVICE_ID_MOXA_CP102EL 0x1025
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#define PCI_DEVICE_ID_MOXA_CP104EL_A 0x1045
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#define PCI_DEVICE_ID_MOXA_CP114EL 0x1144
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#define PCI_DEVICE_ID_MOXA_CP116E_A_A 0x1160
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#define PCI_DEVICE_ID_MOXA_CP116E_A_B 0x1161
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#define PCI_DEVICE_ID_MOXA_CP118EL_A 0x1182
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#define PCI_DEVICE_ID_MOXA_CP118E_A_I 0x1183
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#define PCI_DEVICE_ID_MOXA_CP132EL 0x1322
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#define PCI_DEVICE_ID_MOXA_CP134EL_A 0x1342
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#define PCI_DEVICE_ID_MOXA_CP138E_A 0x1381
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#define PCI_DEVICE_ID_MOXA_CP168EL_A 0x1683
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#define MOXA_BASE_BAUD 921600
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#define MOXA_UART_OFFSET 0x200
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#define MOXA_BASE_BAR 1
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struct moxa8250_board {
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unsigned int num_ports;
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int line[0];
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};
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enum {
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moxa8250_2p = 0,
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moxa8250_4p,
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moxa8250_8p
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};
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static struct moxa8250_board moxa8250_boards[] = {
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[moxa8250_2p] = { .num_ports = 2},
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[moxa8250_4p] = { .num_ports = 4},
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[moxa8250_8p] = { .num_ports = 8},
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};
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static int moxa8250_probe(struct pci_dev *pdev, const struct pci_device_id *id)
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{
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struct uart_8250_port uart;
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struct moxa8250_board *brd;
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void __iomem *ioaddr;
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resource_size_t baseaddr;
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unsigned int i, nr_ports;
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unsigned int offset;
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int ret;
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brd = &moxa8250_boards[id->driver_data];
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nr_ports = brd->num_ports;
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ret = pcim_enable_device(pdev);
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if (ret)
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return ret;
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brd = devm_kzalloc(&pdev->dev, sizeof(struct moxa8250_board) +
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sizeof(unsigned int) * nr_ports, GFP_KERNEL);
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if (!brd)
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return -ENOMEM;
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brd->num_ports = nr_ports;
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memset(&uart, 0, sizeof(struct uart_8250_port));
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uart.port.dev = &pdev->dev;
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uart.port.irq = pdev->irq;
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uart.port.uartclk = MOXA_BASE_BAUD * 16;
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uart.port.flags = UPF_SKIP_TEST | UPF_BOOT_AUTOCONF | UPF_SHARE_IRQ;
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baseaddr = pci_resource_start(pdev, MOXA_BASE_BAR);
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ioaddr = pcim_iomap(pdev, MOXA_BASE_BAR, 0);
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if (!ioaddr)
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return -ENOMEM;
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for (i = 0; i < nr_ports; i++) {
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/*
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* MOXA Smartio MUE boards with 4 ports have
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* a different offset for port #3
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*/
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if (nr_ports == 4 && i == 3)
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offset = 7 * MOXA_UART_OFFSET;
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else
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offset = i * MOXA_UART_OFFSET;
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uart.port.iotype = UPIO_MEM;
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uart.port.iobase = 0;
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uart.port.mapbase = baseaddr + offset;
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uart.port.membase = ioaddr + offset;
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uart.port.regshift = 0;
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dev_dbg(&pdev->dev, "Setup PCI port: port %lx, irq %d, type %d\n",
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uart.port.iobase, uart.port.irq, uart.port.iotype);
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brd->line[i] = serial8250_register_8250_port(&uart);
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if (brd->line[i] < 0) {
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dev_err(&pdev->dev,
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"Couldn't register serial port %lx, irq %d, type %d, error %d\n",
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uart.port.iobase, uart.port.irq,
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uart.port.iotype, brd->line[i]);
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break;
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}
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}
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pci_set_drvdata(pdev, brd);
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return 0;
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}
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static void moxa8250_remove(struct pci_dev *pdev)
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{
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struct moxa8250_board *brd = pci_get_drvdata(pdev);
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unsigned int i;
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for (i = 0; i < brd->num_ports; i++)
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serial8250_unregister_port(brd->line[i]);
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}
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#define MOXA_DEVICE(id, data) { PCI_VDEVICE(MOXA, id), (kernel_ulong_t)data }
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static const struct pci_device_id pci_ids[] = {
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MOXA_DEVICE(PCI_DEVICE_ID_MOXA_CP102E, moxa8250_2p),
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MOXA_DEVICE(PCI_DEVICE_ID_MOXA_CP102EL, moxa8250_2p),
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MOXA_DEVICE(PCI_DEVICE_ID_MOXA_CP104EL_A, moxa8250_4p),
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MOXA_DEVICE(PCI_DEVICE_ID_MOXA_CP114EL, moxa8250_4p),
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MOXA_DEVICE(PCI_DEVICE_ID_MOXA_CP116E_A_A, moxa8250_8p),
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MOXA_DEVICE(PCI_DEVICE_ID_MOXA_CP116E_A_B, moxa8250_8p),
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MOXA_DEVICE(PCI_DEVICE_ID_MOXA_CP118EL_A, moxa8250_8p),
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MOXA_DEVICE(PCI_DEVICE_ID_MOXA_CP118E_A_I, moxa8250_8p),
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MOXA_DEVICE(PCI_DEVICE_ID_MOXA_CP132EL, moxa8250_2p),
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MOXA_DEVICE(PCI_DEVICE_ID_MOXA_CP134EL_A, moxa8250_4p),
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MOXA_DEVICE(PCI_DEVICE_ID_MOXA_CP138E_A, moxa8250_8p),
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MOXA_DEVICE(PCI_DEVICE_ID_MOXA_CP168EL_A, moxa8250_8p),
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{0}
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};
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MODULE_DEVICE_TABLE(pci, pci_ids);
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static struct pci_driver moxa8250_pci_driver = {
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.name = "8250_moxa",
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.id_table = pci_ids,
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.probe = moxa8250_probe,
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.remove = moxa8250_remove,
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};
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module_pci_driver(moxa8250_pci_driver);
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MODULE_AUTHOR("Mathieu OTHACEHE");
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MODULE_DESCRIPTION("MOXA SmartIO MUE driver");
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MODULE_LICENSE("GPL v2");
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