1  // SPDX-License-Identifier: GPL-2.0-or-later
2  /*
3      dmx3191d.c - driver for the Domex DMX3191D SCSI card.
4      Copyright (C) 2000 by Massimo Piccioni <dafastidio@libero.it>
5      Portions Copyright (C) 2004 by Christoph Hellwig <hch@lst.de>
6  
7      Based on the generic NCR5380 driver by Drew Eckhardt et al.
8  
9  */
10  
11  #include <linux/init.h>
12  #include <linux/ioport.h>
13  #include <linux/kernel.h>
14  #include <linux/module.h>
15  #include <linux/pci.h>
16  #include <linux/interrupt.h>
17  #include <asm/io.h>
18  
19  #include <scsi/scsi_host.h>
20  
21  /*
22   * Definitions for the generic 5380 driver.
23   */
24  
25  #define NCR5380_read(reg)		inb(hostdata->base + (reg))
26  #define NCR5380_write(reg, value)	outb(value, hostdata->base + (reg))
27  
28  #define NCR5380_dma_xfer_len		NCR5380_dma_xfer_none
29  #define NCR5380_dma_recv_setup		NCR5380_dma_setup_none
30  #define NCR5380_dma_send_setup		NCR5380_dma_setup_none
31  #define NCR5380_dma_residual		NCR5380_dma_residual_none
32  
33  #define NCR5380_implementation_fields	/* none */
34  
35  #include "NCR5380.h"
36  #include "NCR5380.c"
37  
38  #define DMX3191D_DRIVER_NAME	"dmx3191d"
39  #define DMX3191D_REGION_LEN	8
40  
41  
42  static const struct scsi_host_template dmx3191d_driver_template = {
43  	.module			= THIS_MODULE,
44  	.proc_name		= DMX3191D_DRIVER_NAME,
45  	.name			= "Domex DMX3191D",
46  	.info			= NCR5380_info,
47  	.queuecommand		= NCR5380_queue_command,
48  	.eh_abort_handler	= NCR5380_abort,
49  	.eh_host_reset_handler	= NCR5380_host_reset,
50  	.can_queue		= 32,
51  	.this_id		= 7,
52  	.sg_tablesize		= SG_ALL,
53  	.cmd_per_lun		= 2,
54  	.dma_boundary		= PAGE_SIZE - 1,
55  	.cmd_size		= sizeof(struct NCR5380_cmd),
56  };
57  
dmx3191d_probe_one(struct pci_dev * pdev,const struct pci_device_id * id)58  static int dmx3191d_probe_one(struct pci_dev *pdev,
59  			      const struct pci_device_id *id)
60  {
61  	struct Scsi_Host *shost;
62  	struct NCR5380_hostdata *hostdata;
63  	unsigned long io;
64  	int error = -ENODEV;
65  
66  	if (pci_enable_device(pdev))
67  		goto out;
68  
69  	io = pci_resource_start(pdev, 0);
70  	if (!request_region(io, DMX3191D_REGION_LEN, DMX3191D_DRIVER_NAME)) {
71  		printk(KERN_ERR "dmx3191: region 0x%lx-0x%lx already reserved\n",
72  				io, io + DMX3191D_REGION_LEN);
73  		goto out_disable_device;
74  	}
75  
76  	shost = scsi_host_alloc(&dmx3191d_driver_template,
77  			sizeof(struct NCR5380_hostdata));
78  	if (!shost)
79  		goto out_release_region;
80  
81  	hostdata = shost_priv(shost);
82  	hostdata->base = io;
83  
84  	/* This card does not seem to raise an interrupt on pdev->irq.
85  	 * Steam-powered SCSI controllers run without an IRQ anyway.
86  	 */
87  	shost->irq = NO_IRQ;
88  
89  	error = NCR5380_init(shost, 0);
90  	if (error)
91  		goto out_host_put;
92  
93  	NCR5380_maybe_reset_bus(shost);
94  
95  	pci_set_drvdata(pdev, shost);
96  
97  	error = scsi_add_host(shost, &pdev->dev);
98  	if (error)
99  		goto out_exit;
100  
101  	scsi_scan_host(shost);
102  	return 0;
103  
104  out_exit:
105  	NCR5380_exit(shost);
106  out_host_put:
107  	scsi_host_put(shost);
108   out_release_region:
109  	release_region(io, DMX3191D_REGION_LEN);
110   out_disable_device:
111  	pci_disable_device(pdev);
112   out:
113  	return error;
114  }
115  
dmx3191d_remove_one(struct pci_dev * pdev)116  static void dmx3191d_remove_one(struct pci_dev *pdev)
117  {
118  	struct Scsi_Host *shost = pci_get_drvdata(pdev);
119  	struct NCR5380_hostdata *hostdata = shost_priv(shost);
120  	unsigned long io = hostdata->base;
121  
122  	scsi_remove_host(shost);
123  
124  	NCR5380_exit(shost);
125  	scsi_host_put(shost);
126  	release_region(io, DMX3191D_REGION_LEN);
127  	pci_disable_device(pdev);
128  }
129  
130  static struct pci_device_id dmx3191d_pci_tbl[] = {
131  	{PCI_VENDOR_ID_DOMEX, PCI_DEVICE_ID_DOMEX_DMX3191D,
132  		PCI_ANY_ID, PCI_ANY_ID, 0, 0, 4},
133  	{ }
134  };
135  MODULE_DEVICE_TABLE(pci, dmx3191d_pci_tbl);
136  
137  static struct pci_driver dmx3191d_pci_driver = {
138  	.name		= DMX3191D_DRIVER_NAME,
139  	.id_table	= dmx3191d_pci_tbl,
140  	.probe		= dmx3191d_probe_one,
141  	.remove		= dmx3191d_remove_one,
142  };
143  
144  module_pci_driver(dmx3191d_pci_driver);
145  
146  MODULE_AUTHOR("Massimo Piccioni <dafastidio@libero.it>");
147  MODULE_DESCRIPTION("Domex DMX3191D SCSI driver");
148  MODULE_LICENSE("GPL");
149