drivers/scsi/bvme6000_scsi.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Detection routine for the NCR53c710 based BVME6000 SCSI Controllers for Linux.
   4  *
   5  * Based on work by Alan Hourihane and Kars de Jong
   6  *
   7  * Rewritten to use 53c700.c by Richard Hirst <richard@sleepie.demon.co.uk>
   8  */
   9
  10 #include <linux/module.h>
  11 #include <linux/blkdev.h>
  12 #include <linux/device.h>
  13 #include <linux/platform_device.h>
  14 #include <linux/init.h>
  15 #include <linux/interrupt.h>
  16 #include <linux/slab.h>
  17 #include <asm/bvme6000hw.h>
  18 #include <scsi/scsi_host.h>
  19 #include <scsi/scsi_device.h>
  20 #include <scsi/scsi_transport.h>
  21 #include <scsi/scsi_transport_spi.h>
  22
  23 #include "53c700.h"
  24
  25 MODULE_AUTHOR("Richard Hirst <richard@sleepie.demon.co.uk>");
  26 MODULE_DESCRIPTION("BVME6000 NCR53C710 driver");
  27 MODULE_LICENSE("GPL");
  28
  29 static struct scsi_host_template bvme6000_scsi_driver_template = {
  30         .name                   = "BVME6000 NCR53c710 SCSI",
  31         .proc_name              = "BVME6000",
  32         .this_id                = 7,
  33         .module                 = THIS_MODULE,
  34 };
  35
  36 static struct platform_device *bvme6000_scsi_device;
  37
  38 static int
  39 bvme6000_probe(struct platform_device *dev)
  40 {
  41         struct Scsi_Host *host;
  42         struct NCR_700_Host_Parameters *hostdata;
  43
  44         if (!MACH_IS_BVME6000)
  45                 goto out;
  46
  47         hostdata = kzalloc(sizeof(struct NCR_700_Host_Parameters), GFP_KERNEL);
  48         if (!hostdata) {
  49                 printk(KERN_ERR "bvme6000-scsi: "
  50                                 "Failed to allocate host data\n");
  51                 goto out;
  52         }
  53
  54         /* Fill in the required pieces of hostdata */
  55         hostdata->base = (void __iomem *)BVME_NCR53C710_BASE;
  56         hostdata->clock = 40;   /* XXX - depends on the CPU clock! */
  57         hostdata->chip710 = 1;
  58         hostdata->dmode_extra = DMODE_FC2;
  59         hostdata->dcntl_extra = EA_710;
  60         hostdata->ctest7_extra = CTEST7_TT1;
  61
  62         /* and register the chip */
  63         host = NCR_700_detect(&bvme6000_scsi_driver_template, hostdata,
  64                               &dev->dev);
  65         if (!host) {
  66                 printk(KERN_ERR "bvme6000-scsi: No host detected; "
  67                                 "board configuration problem?\n");
  68                 goto out_free;
  69         }
  70         host->base = BVME_NCR53C710_BASE;
  71         host->this_id = 7;
  72         host->irq = BVME_IRQ_SCSI;
  73         if (request_irq(BVME_IRQ_SCSI, NCR_700_intr, 0, "bvme6000-scsi",
  74                         host)) {
  75                 printk(KERN_ERR "bvme6000-scsi: request_irq failed\n");
  76                 goto out_put_host;
  77         }
  78
  79         platform_set_drvdata(dev, host);
  80         scsi_scan_host(host);
  81
  82         return 0;
  83
  84  out_put_host:
  85         scsi_host_put(host);
  86  out_free:
  87         kfree(hostdata);
  88  out:
  89         return -ENODEV;
  90 }
  91
  92 static int
  93 bvme6000_device_remove(struct platform_device *dev)
  94 {
  95         struct Scsi_Host *host = platform_get_drvdata(dev);
  96         struct NCR_700_Host_Parameters *hostdata = shost_priv(host);
  97
  98         scsi_remove_host(host);
  99         NCR_700_release(host);
 100         kfree(hostdata);
 101         free_irq(host->irq, host);
 102
 103         return 0;
 104 }
 105
 106 static struct platform_driver bvme6000_scsi_driver = {
 107         .driver = {
 108                 .name           = "bvme6000-scsi",
 109         },
 110         .probe          = bvme6000_probe,
 111         .remove         = bvme6000_device_remove,
 112 };
 113
 114 static int __init bvme6000_scsi_init(void)
 115 {
 116         int err;
 117
 118         err = platform_driver_register(&bvme6000_scsi_driver);
 119         if (err)
 120                 return err;
 121
 122         bvme6000_scsi_device = platform_device_register_simple("bvme6000-scsi",
 123                                                                -1, NULL, 0);
 124         if (IS_ERR(bvme6000_scsi_device)) {
 125                 platform_driver_unregister(&bvme6000_scsi_driver);
 126                 return PTR_ERR(bvme6000_scsi_device);
 127         }
 128
 129         return 0;
 130 }
 131
 132 static void __exit bvme6000_scsi_exit(void)
 133 {
 134         platform_device_unregister(bvme6000_scsi_device);
 135         platform_driver_unregister(&bvme6000_scsi_driver);
 136 }
 137
 138 module_init(bvme6000_scsi_init);
 139 module_exit(bvme6000_scsi_exit);