drivers/scsi/dmx3191d.c

0001 // SPDX-License-Identifier: GPL-2.0-or-later
0002 /*
0003     dmx3191d.c - driver for the Domex DMX3191D SCSI card.
0004     Copyright (C) 2000 by Massimo Piccioni <dafastidio@libero.it>
0005     Portions Copyright (C) 2004 by Christoph Hellwig <hch@lst.de>
0006
0007     Based on the generic NCR5380 driver by Drew Eckhardt et al.
0008
0009 */
0010
0011 #include <linux/init.h>
0012 #include <linux/ioport.h>
0013 #include <linux/kernel.h>
0014 #include <linux/module.h>
0015 #include <linux/pci.h>
0016 #include <linux/interrupt.h>
0017 #include <asm/io.h>
0018
0019 #include <scsi/scsi_host.h>
0020
0021 /*
0022  * Definitions for the generic 5380 driver.
0023  */
0024
0025 #define NCR5380_read(reg)       inb(hostdata->base + (reg))
0026 #define NCR5380_write(reg, value)   outb(value, hostdata->base + (reg))
0027
0028 #define NCR5380_dma_xfer_len        NCR5380_dma_xfer_none
0029 #define NCR5380_dma_recv_setup      NCR5380_dma_setup_none
0030 #define NCR5380_dma_send_setup      NCR5380_dma_setup_none
0031 #define NCR5380_dma_residual        NCR5380_dma_residual_none
0032
0033 #define NCR5380_implementation_fields   /* none */
0034
0035 #include "NCR5380.h"
0036 #include "NCR5380.c"
0037
0038 #define DMX3191D_DRIVER_NAME    "dmx3191d"
0039 #define DMX3191D_REGION_LEN 8
0040
0041
0042 static struct scsi_host_template dmx3191d_driver_template = {
0043     .module         = THIS_MODULE,
0044     .proc_name      = DMX3191D_DRIVER_NAME,
0045     .name           = "Domex DMX3191D",
0046     .info           = NCR5380_info,
0047     .queuecommand       = NCR5380_queue_command,
0048     .eh_abort_handler   = NCR5380_abort,
0049     .eh_host_reset_handler  = NCR5380_host_reset,
0050     .can_queue      = 32,
0051     .this_id        = 7,
0052     .sg_tablesize       = SG_ALL,
0053     .cmd_per_lun        = 2,
0054     .dma_boundary       = PAGE_SIZE - 1,
0055     .cmd_size       = sizeof(struct NCR5380_cmd),
0056 };
0057
0058 static int dmx3191d_probe_one(struct pci_dev *pdev,
0059                   const struct pci_device_id *id)
0060 {
0061     struct Scsi_Host *shost;
0062     struct NCR5380_hostdata *hostdata;
0063     unsigned long io;
0064     int error = -ENODEV;
0065
0066     if (pci_enable_device(pdev))
0067         goto out;
0068
0069     io = pci_resource_start(pdev, 0);
0070     if (!request_region(io, DMX3191D_REGION_LEN, DMX3191D_DRIVER_NAME)) {
0071         printk(KERN_ERR "dmx3191: region 0x%lx-0x%lx already reserved\n",
0072                 io, io + DMX3191D_REGION_LEN);
0073         goto out_disable_device;
0074     }
0075
0076     shost = scsi_host_alloc(&dmx3191d_driver_template,
0077             sizeof(struct NCR5380_hostdata));
0078     if (!shost)
0079         goto out_release_region;
0080
0081     hostdata = shost_priv(shost);
0082     hostdata->base = io;
0083
0084     /* This card does not seem to raise an interrupt on pdev->irq.
0085      * Steam-powered SCSI controllers run without an IRQ anyway.
0086      */
0087     shost->irq = NO_IRQ;
0088
0089     error = NCR5380_init(shost, 0);
0090     if (error)
0091         goto out_host_put;
0092
0093     NCR5380_maybe_reset_bus(shost);
0094
0095     pci_set_drvdata(pdev, shost);
0096
0097     error = scsi_add_host(shost, &pdev->dev);
0098     if (error)
0099         goto out_exit;
0100
0101     scsi_scan_host(shost);
0102     return 0;
0103
0104 out_exit:
0105     NCR5380_exit(shost);
0106 out_host_put:
0107     scsi_host_put(shost);
0108  out_release_region:
0109     release_region(io, DMX3191D_REGION_LEN);
0110  out_disable_device:
0111     pci_disable_device(pdev);
0112  out:
0113     return error;
0114 }
0115
0116 static void dmx3191d_remove_one(struct pci_dev *pdev)
0117 {
0118     struct Scsi_Host *shost = pci_get_drvdata(pdev);
0119     struct NCR5380_hostdata *hostdata = shost_priv(shost);
0120     unsigned long io = hostdata->base;
0121
0122     scsi_remove_host(shost);
0123
0124     NCR5380_exit(shost);
0125     scsi_host_put(shost);
0126     release_region(io, DMX3191D_REGION_LEN);
0127     pci_disable_device(pdev);
0128 }
0129
0130 static struct pci_device_id dmx3191d_pci_tbl[] = {
0131     {PCI_VENDOR_ID_DOMEX, PCI_DEVICE_ID_DOMEX_DMX3191D,
0132         PCI_ANY_ID, PCI_ANY_ID, 0, 0, 4},
0133     { }
0134 };
0135 MODULE_DEVICE_TABLE(pci, dmx3191d_pci_tbl);
0136
0137 static struct pci_driver dmx3191d_pci_driver = {
0138     .name       = DMX3191D_DRIVER_NAME,
0139     .id_table   = dmx3191d_pci_tbl,
0140     .probe      = dmx3191d_probe_one,
0141     .remove     = dmx3191d_remove_one,
0142 };
0143
0144 module_pci_driver(dmx3191d_pci_driver);
0145
0146 MODULE_AUTHOR("Massimo Piccioni <dafastidio@libero.it>");
0147 MODULE_DESCRIPTION("Domex DMX3191D SCSI driver");
0148 MODULE_LICENSE("GPL");