393 lines
9.9 KiB
C
393 lines
9.9 KiB
C
/************************************************************************
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* Copyright 2003 Digi International (www.digi.com)
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*
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* Copyright (C) 2004 IBM Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the
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* implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU General Public License for more details.
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*
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* Contact Information:
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* Scott H Kilau <Scott_Kilau@digi.com>
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* Wendy Xiong <wendyx@us.ibm.com>
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*
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*
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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 <linux/slab.h>
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#include "jsm.h"
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MODULE_AUTHOR("Digi International, http://www.digi.com");
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MODULE_DESCRIPTION("Driver for the Digi International Neo and Classic PCI based product line");
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MODULE_LICENSE("GPL");
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MODULE_SUPPORTED_DEVICE("jsm");
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#define JSM_DRIVER_NAME "jsm"
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#define NR_PORTS 32
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#define JSM_MINOR_START 0
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struct uart_driver jsm_uart_driver = {
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.owner = THIS_MODULE,
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.driver_name = JSM_DRIVER_NAME,
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.dev_name = "ttyn",
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.major = 0,
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.minor = JSM_MINOR_START,
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.nr = NR_PORTS,
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};
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static pci_ers_result_t jsm_io_error_detected(struct pci_dev *pdev,
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pci_channel_state_t state);
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static pci_ers_result_t jsm_io_slot_reset(struct pci_dev *pdev);
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static void jsm_io_resume(struct pci_dev *pdev);
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static const struct pci_error_handlers jsm_err_handler = {
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.error_detected = jsm_io_error_detected,
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.slot_reset = jsm_io_slot_reset,
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.resume = jsm_io_resume,
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};
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int jsm_debug;
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module_param(jsm_debug, int, 0);
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MODULE_PARM_DESC(jsm_debug, "Driver debugging level");
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static int jsm_probe_one(struct pci_dev *pdev, const struct pci_device_id *ent)
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{
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int rc = 0;
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struct jsm_board *brd;
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static int adapter_count;
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rc = pci_enable_device(pdev);
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if (rc) {
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dev_err(&pdev->dev, "Device enable FAILED\n");
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goto out;
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}
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rc = pci_request_regions(pdev, JSM_DRIVER_NAME);
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if (rc) {
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dev_err(&pdev->dev, "pci_request_region FAILED\n");
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goto out_disable_device;
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}
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brd = kzalloc(sizeof(*brd), GFP_KERNEL);
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if (!brd) {
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rc = -ENOMEM;
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goto out_release_regions;
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}
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/* store the info for the board we've found */
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brd->boardnum = adapter_count++;
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brd->pci_dev = pdev;
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switch (pdev->device) {
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case PCI_DEVICE_ID_NEO_2DB9:
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case PCI_DEVICE_ID_NEO_2DB9PRI:
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case PCI_DEVICE_ID_NEO_2RJ45:
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case PCI_DEVICE_ID_NEO_2RJ45PRI:
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case PCI_DEVICE_ID_NEO_2_422_485:
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brd->maxports = 2;
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break;
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case PCI_DEVICE_ID_CLASSIC_4:
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case PCI_DEVICE_ID_CLASSIC_4_422:
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case PCI_DEVICE_ID_NEO_4:
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case PCIE_DEVICE_ID_NEO_4:
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case PCIE_DEVICE_ID_NEO_4RJ45:
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case PCIE_DEVICE_ID_NEO_4_IBM:
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brd->maxports = 4;
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break;
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case PCI_DEVICE_ID_CLASSIC_8:
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case PCI_DEVICE_ID_CLASSIC_8_422:
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case PCI_DEVICE_ID_DIGI_NEO_8:
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case PCIE_DEVICE_ID_NEO_8:
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case PCIE_DEVICE_ID_NEO_8RJ45:
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brd->maxports = 8;
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break;
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default:
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brd->maxports = 1;
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break;
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}
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spin_lock_init(&brd->bd_intr_lock);
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/* store which revision we have */
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brd->rev = pdev->revision;
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brd->irq = pdev->irq;
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switch (pdev->device) {
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case PCI_DEVICE_ID_CLASSIC_4:
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case PCI_DEVICE_ID_CLASSIC_4_422:
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case PCI_DEVICE_ID_CLASSIC_8:
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case PCI_DEVICE_ID_CLASSIC_8_422:
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jsm_dbg(INIT, &brd->pci_dev,
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"jsm_found_board - Classic adapter\n");
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/*
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* For PCI ClassicBoards
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* PCI Local Address (.i.e. "resource" number) space
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* 0 PLX Memory Mapped Config
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* 1 PLX I/O Mapped Config
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* 2 I/O Mapped UARTs and Status
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* 3 Memory Mapped VPD
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* 4 Memory Mapped UARTs and Status
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*/
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/* Get the PCI Base Address Registers */
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brd->membase = pci_resource_start(pdev, 4);
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brd->membase_end = pci_resource_end(pdev, 4);
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if (brd->membase & 0x1)
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brd->membase &= ~0x3;
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else
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brd->membase &= ~0xF;
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brd->iobase = pci_resource_start(pdev, 1);
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brd->iobase_end = pci_resource_end(pdev, 1);
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brd->iobase = ((unsigned int)(brd->iobase)) & 0xFFFE;
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/* Assign the board_ops struct */
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brd->bd_ops = &jsm_cls_ops;
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brd->bd_uart_offset = 0x8;
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brd->bd_dividend = 921600;
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brd->re_map_membase = ioremap(brd->membase,
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pci_resource_len(pdev, 4));
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if (!brd->re_map_membase) {
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dev_err(&pdev->dev,
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"Card has no PCI Memory resources, failing board.\n");
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rc = -ENOMEM;
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goto out_kfree_brd;
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}
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/*
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* Enable Local Interrupt 1 (0x1),
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* Local Interrupt 1 Polarity Active high (0x2),
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* Enable PCI interrupt (0x43)
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*/
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outb(0x43, brd->iobase + 0x4c);
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break;
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case PCI_DEVICE_ID_NEO_2DB9:
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case PCI_DEVICE_ID_NEO_2DB9PRI:
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case PCI_DEVICE_ID_NEO_2RJ45:
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case PCI_DEVICE_ID_NEO_2RJ45PRI:
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case PCI_DEVICE_ID_NEO_2_422_485:
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case PCI_DEVICE_ID_NEO_4:
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case PCIE_DEVICE_ID_NEO_4:
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case PCIE_DEVICE_ID_NEO_4RJ45:
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case PCIE_DEVICE_ID_NEO_4_IBM:
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case PCI_DEVICE_ID_DIGI_NEO_8:
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case PCIE_DEVICE_ID_NEO_8:
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case PCIE_DEVICE_ID_NEO_8RJ45:
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jsm_dbg(INIT, &brd->pci_dev, "jsm_found_board - NEO adapter\n");
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/* get the PCI Base Address Registers */
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brd->membase = pci_resource_start(pdev, 0);
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brd->membase_end = pci_resource_end(pdev, 0);
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if (brd->membase & 1)
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brd->membase &= ~0x3;
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else
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brd->membase &= ~0xF;
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/* Assign the board_ops struct */
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brd->bd_ops = &jsm_neo_ops;
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brd->bd_uart_offset = 0x200;
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brd->bd_dividend = 921600;
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brd->re_map_membase = ioremap(brd->membase,
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pci_resource_len(pdev, 0));
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if (!brd->re_map_membase) {
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dev_err(&pdev->dev,
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"Card has no PCI Memory resources, failing board.\n");
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rc = -ENOMEM;
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goto out_kfree_brd;
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}
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break;
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default:
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return -ENXIO;
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}
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rc = request_irq(brd->irq, brd->bd_ops->intr, IRQF_SHARED, "JSM", brd);
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if (rc) {
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dev_warn(&pdev->dev, "Failed to hook IRQ %d\n", brd->irq);
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goto out_iounmap;
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}
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rc = jsm_tty_init(brd);
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if (rc < 0) {
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dev_err(&pdev->dev, "Can't init tty devices (%d)\n", rc);
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rc = -ENXIO;
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goto out_free_irq;
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}
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rc = jsm_uart_port_init(brd);
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if (rc < 0) {
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/* XXX: leaking all resources from jsm_tty_init here! */
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dev_err(&pdev->dev, "Can't init uart port (%d)\n", rc);
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rc = -ENXIO;
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goto out_free_irq;
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}
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/* Log the information about the board */
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dev_info(&pdev->dev, "board %d: Digi Classic/Neo (rev %d), irq %d\n",
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adapter_count, brd->rev, brd->irq);
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pci_set_drvdata(pdev, brd);
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pci_save_state(pdev);
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return 0;
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out_free_irq:
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jsm_remove_uart_port(brd);
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free_irq(brd->irq, brd);
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out_iounmap:
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iounmap(brd->re_map_membase);
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out_kfree_brd:
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kfree(brd);
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out_release_regions:
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pci_release_regions(pdev);
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out_disable_device:
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pci_disable_device(pdev);
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out:
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return rc;
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}
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static void jsm_remove_one(struct pci_dev *pdev)
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{
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struct jsm_board *brd = pci_get_drvdata(pdev);
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int i = 0;
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switch (pdev->device) {
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case PCI_DEVICE_ID_CLASSIC_4:
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case PCI_DEVICE_ID_CLASSIC_4_422:
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case PCI_DEVICE_ID_CLASSIC_8:
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case PCI_DEVICE_ID_CLASSIC_8_422:
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/* Tell card not to interrupt anymore. */
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outb(0x0, brd->iobase + 0x4c);
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break;
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default:
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break;
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}
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jsm_remove_uart_port(brd);
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free_irq(brd->irq, brd);
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iounmap(brd->re_map_membase);
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/* Free all allocated channels structs */
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for (i = 0; i < brd->maxports; i++) {
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if (brd->channels[i]) {
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kfree(brd->channels[i]->ch_rqueue);
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kfree(brd->channels[i]->ch_equeue);
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kfree(brd->channels[i]);
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}
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}
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pci_release_regions(pdev);
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pci_disable_device(pdev);
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kfree(brd);
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}
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static struct pci_device_id jsm_pci_tbl[] = {
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{ PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2DB9), 0, 0, 0 },
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{ PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2DB9PRI), 0, 0, 1 },
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{ PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2RJ45), 0, 0, 2 },
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{ PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2RJ45PRI), 0, 0, 3 },
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{ PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCIE_DEVICE_ID_NEO_4_IBM), 0, 0, 4 },
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{ PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_DIGI_NEO_8), 0, 0, 5 },
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{ PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_4), 0, 0, 6 },
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{ PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_1_422), 0, 0, 7 },
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{ PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_1_422_485), 0, 0, 8 },
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{ PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2_422_485), 0, 0, 9 },
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{ PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCIE_DEVICE_ID_NEO_8), 0, 0, 10 },
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{ PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCIE_DEVICE_ID_NEO_4), 0, 0, 11 },
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{ PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCIE_DEVICE_ID_NEO_4RJ45), 0, 0, 12 },
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{ PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCIE_DEVICE_ID_NEO_8RJ45), 0, 0, 13 },
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{ PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_CLASSIC_4), 0, 0, 14 },
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{ PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_CLASSIC_4_422), 0, 0, 15 },
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{ PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_CLASSIC_8), 0, 0, 16 },
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{ PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_CLASSIC_8_422), 0, 0, 17 },
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{ 0, }
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};
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MODULE_DEVICE_TABLE(pci, jsm_pci_tbl);
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static struct pci_driver jsm_driver = {
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.name = JSM_DRIVER_NAME,
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.id_table = jsm_pci_tbl,
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.probe = jsm_probe_one,
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.remove = jsm_remove_one,
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.err_handler = &jsm_err_handler,
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};
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static pci_ers_result_t jsm_io_error_detected(struct pci_dev *pdev,
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pci_channel_state_t state)
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{
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struct jsm_board *brd = pci_get_drvdata(pdev);
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jsm_remove_uart_port(brd);
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return PCI_ERS_RESULT_NEED_RESET;
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}
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static pci_ers_result_t jsm_io_slot_reset(struct pci_dev *pdev)
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{
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int rc;
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rc = pci_enable_device(pdev);
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if (rc)
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return PCI_ERS_RESULT_DISCONNECT;
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pci_set_master(pdev);
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return PCI_ERS_RESULT_RECOVERED;
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}
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static void jsm_io_resume(struct pci_dev *pdev)
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{
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struct jsm_board *brd = pci_get_drvdata(pdev);
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pci_restore_state(pdev);
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pci_save_state(pdev);
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jsm_uart_port_init(brd);
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}
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static int __init jsm_init_module(void)
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{
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int rc;
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rc = uart_register_driver(&jsm_uart_driver);
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if (!rc) {
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rc = pci_register_driver(&jsm_driver);
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if (rc)
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uart_unregister_driver(&jsm_uart_driver);
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}
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return rc;
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}
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static void __exit jsm_exit_module(void)
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{
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pci_unregister_driver(&jsm_driver);
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uart_unregister_driver(&jsm_uart_driver);
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}
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module_init(jsm_init_module);
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module_exit(jsm_exit_module);
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