LXR linux/drivers/scsi/mvme16x

   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * Detection routine for the NCR53c710 based MVME16x SCSI Controllers for Linux.
   4 *
   5 * Based on work by Alan Hourihane
   6 *
   7 * Rewritten to use 53c700.c by Kars de Jong <jongk@linux-m68k.org>
   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/mvme16xhw.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
  25MODULE_AUTHOR("Kars de Jong <jongk@linux-m68k.org>");
  26MODULE_DESCRIPTION("MVME16x NCR53C710 driver");
  27MODULE_LICENSE("GPL");
  28
  29static struct scsi_host_template mvme16x_scsi_driver_template = {
  30        .name                   = "MVME16x NCR53c710 SCSI",
  31        .proc_name              = "MVME16x",
  32        .this_id                = 7,
  33        .module                 = THIS_MODULE,
  34};
  35
  36static struct platform_device *mvme16x_scsi_device;
  37
  38static int mvme16x_probe(struct platform_device *dev)
  39{
  40        struct Scsi_Host * host = NULL;
  41        struct NCR_700_Host_Parameters *hostdata;
  42
  43        if (!MACH_IS_MVME16x)
  44                goto out;
  45
  46        if (mvme16x_config & MVME16x_CONFIG_NO_SCSICHIP) {
  47                printk(KERN_INFO "mvme16x-scsi: detection disabled, "
  48                                 "SCSI chip not present\n");
  49                goto out;
  50        }
  51
  52        hostdata = kzalloc(sizeof(struct NCR_700_Host_Parameters), GFP_KERNEL);
  53        if (hostdata == NULL) {
  54                printk(KERN_ERR "mvme16x-scsi: "
  55                                "Failed to allocate host data\n");
  56                goto out;
  57        }
  58
  59        /* Fill in the required pieces of hostdata */
  60        hostdata->base = (void __iomem *)0xfff47000UL;
  61        hostdata->clock = 50;   /* XXX - depends on the CPU clock! */
  62        hostdata->chip710 = 1;
  63        hostdata->dmode_extra = DMODE_FC2;
  64        hostdata->dcntl_extra = EA_710;
  65        hostdata->ctest7_extra = CTEST7_TT1;
  66
  67        /* and register the chip */
  68        host = NCR_700_detect(&mvme16x_scsi_driver_template, hostdata,
  69                              &dev->dev);
  70        if (!host) {
  71                printk(KERN_ERR "mvme16x-scsi: No host detected; "
  72                                "board configuration problem?\n");
  73                goto out_free;
  74        }
  75        host->this_id = 7;
  76        host->base = 0xfff47000UL;
  77        host->irq = MVME16x_IRQ_SCSI;
  78        if (request_irq(host->irq, NCR_700_intr, 0, "mvme16x-scsi", host)) {
  79                printk(KERN_ERR "mvme16x-scsi: request_irq failed\n");
  80                goto out_put_host;
  81        }
  82
  83        /* Enable scsi chip ints */
  84        {
  85                volatile unsigned long v;
  86
  87                /* Enable scsi interrupts at level 4 in PCCchip2 */
  88                v = in_be32(0xfff4202c);
  89                v = (v & ~0xff) | 0x10 | 4;
  90                out_be32(0xfff4202c, v);
  91        }
  92
  93        platform_set_drvdata(dev, host);
  94        scsi_scan_host(host);
  95
  96        return 0;
  97
  98 out_put_host:
  99        scsi_host_put(host);
 100 out_free:
 101        kfree(hostdata);
 102 out:
 103        return -ENODEV;
 104}
 105
 106static int mvme16x_device_remove(struct platform_device *dev)
 107{
 108        struct Scsi_Host *host = platform_get_drvdata(dev);
 109        struct NCR_700_Host_Parameters *hostdata = shost_priv(host);
 110
 111        /* Disable scsi chip ints */
 112        {
 113                volatile unsigned long v;
 114
 115                v = in_be32(0xfff4202c);
 116                v &= ~0x10;
 117                out_be32(0xfff4202c, v);
 118        }
 119        scsi_remove_host(host);
 120        NCR_700_release(host);
 121        kfree(hostdata);
 122        free_irq(host->irq, host);
 123
 124        return 0;
 125}
 126
 127static struct platform_driver mvme16x_scsi_driver = {
 128        .driver = {
 129                .name           = "mvme16x-scsi",
 130        },
 131        .probe          = mvme16x_probe,
 132        .remove         = mvme16x_device_remove,
 133};
 134
 135static int __init mvme16x_scsi_init(void)
 136{
 137        int err;
 138
 139        err = platform_driver_register(&mvme16x_scsi_driver);
 140        if (err)
 141                return err;
 142
 143        mvme16x_scsi_device = platform_device_register_simple("mvme16x-scsi",
 144                                                              -1, NULL, 0);
 145        if (IS_ERR(mvme16x_scsi_device)) {
 146                platform_driver_unregister(&mvme16x_scsi_driver);
 147                return PTR_ERR(mvme16x_scsi_device);
 148        }
 149
 150        return 0;
 151}
 152
 153static void __exit mvme16x_scsi_exit(void)
 154{
 155        platform_device_unregister(mvme16x_scsi_device);
 156        platform_driver_unregister(&mvme16x_scsi_driver);
 157}
 158
 159module_init(mvme16x_scsi_init);
 160module_exit(mvme16x_scsi_exit);
 161