drivers/scsi/sni_53c710.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /* -*- mode: c; c-basic-offset: 8 -*- */
   3
   4 /* SNI RM driver
   5  *
   6  * Copyright (C) 2001 by James.Bottomley@HansenPartnership.com
   7 **-----------------------------------------------------------------------------
   8 **
   9 **
  10 **-----------------------------------------------------------------------------
  11  */
  12
  13 /*
  14  * Based on lasi700.c
  15  */
  16
  17 #include <linux/kernel.h>
  18 #include <linux/module.h>
  19 #include <linux/init.h>
  20 #include <linux/types.h>
  21 #include <linux/slab.h>
  22 #include <linux/stat.h>
  23 #include <linux/mm.h>
  24 #include <linux/blkdev.h>
  25 #include <linux/sched.h>
  26 #include <linux/ioport.h>
  27 #include <linux/dma-mapping.h>
  28 #include <linux/platform_device.h>
  29
  30 #include <asm/page.h>
  31 #include <asm/pgtable.h>
  32 #include <asm/irq.h>
  33 #include <asm/delay.h>
  34
  35 #include <scsi/scsi_host.h>
  36 #include <scsi/scsi_device.h>
  37 #include <scsi/scsi_transport.h>
  38 #include <scsi/scsi_transport_spi.h>
  39
  40 #include "53c700.h"
  41
  42 MODULE_AUTHOR("Thomas Bogendörfer");
  43 MODULE_DESCRIPTION("SNI RM 53c710 SCSI Driver");
  44 MODULE_LICENSE("GPL");
  45 MODULE_ALIAS("platform:snirm_53c710");
  46
  47 #define SNIRM710_CLOCK  32
  48
  49 static struct scsi_host_template snirm710_template = {
  50         .name           = "SNI RM SCSI 53c710",
  51         .proc_name      = "snirm_53c710",
  52         .this_id        = 7,
  53         .module         = THIS_MODULE,
  54 };
  55
  56 static int snirm710_probe(struct platform_device *dev)
  57 {
  58         unsigned long base;
  59         struct NCR_700_Host_Parameters *hostdata;
  60         struct Scsi_Host *host;
  61         struct  resource *res;
  62
  63         res = platform_get_resource(dev, IORESOURCE_MEM, 0);
  64         if (!res)
  65                 return -ENODEV;
  66
  67         base = res->start;
  68         hostdata = kzalloc(sizeof(*hostdata), GFP_KERNEL);
  69         if (!hostdata) {
  70                 dev_printk(KERN_ERR, dev, "Failed to allocate host data\n");
  71                 return -ENOMEM;
  72         }
  73
  74         hostdata->dev = &dev->dev;
  75         dma_set_mask(&dev->dev, DMA_BIT_MASK(32));
  76         hostdata->base = ioremap_nocache(base, 0x100);
  77         hostdata->differential = 0;
  78
  79         hostdata->clock = SNIRM710_CLOCK;
  80         hostdata->force_le_on_be = 1;
  81         hostdata->chip710 = 1;
  82         hostdata->burst_length = 4;
  83
  84         host = NCR_700_detect(&snirm710_template, hostdata, &dev->dev);
  85         if (!host)
  86                 goto out_kfree;
  87         host->this_id = 7;
  88         host->base = base;
  89         host->irq = platform_get_irq(dev, 0);
  90         if(request_irq(host->irq, NCR_700_intr, IRQF_SHARED, "snirm710", host)) {
  91                 printk(KERN_ERR "snirm710: request_irq failed!\n");
  92                 goto out_put_host;
  93         }
  94
  95         dev_set_drvdata(&dev->dev, host);
  96         scsi_scan_host(host);
  97
  98         return 0;
  99
 100  out_put_host:
 101         scsi_host_put(host);
 102  out_kfree:
 103         iounmap(hostdata->base);
 104         kfree(hostdata);
 105         return -ENODEV;
 106 }
 107
 108 static int snirm710_driver_remove(struct platform_device *dev)
 109 {
 110         struct Scsi_Host *host = dev_get_drvdata(&dev->dev);
 111         struct NCR_700_Host_Parameters *hostdata =
 112                 (struct NCR_700_Host_Parameters *)host->hostdata[0];
 113
 114         scsi_remove_host(host);
 115         NCR_700_release(host);
 116         free_irq(host->irq, host);
 117         iounmap(hostdata->base);
 118         kfree(hostdata);
 119
 120         return 0;
 121 }
 122
 123 static struct platform_driver snirm710_driver = {
 124         .probe  = snirm710_probe,
 125         .remove = snirm710_driver_remove,
 126         .driver = {
 127                 .name   = "snirm_53c710",
 128         },
 129 };
 130
 131 static int __init snirm710_init(void)
 132 {
 133         return platform_driver_register(&snirm710_driver);
 134 }
 135
 136 static void __exit snirm710_exit(void)
 137 {
 138         platform_driver_unregister(&snirm710_driver);
 139 }
 140
 141 module_init(snirm710_init);
 142 module_exit(snirm710_exit);