drivers/scsi/sni_53c710.c

   1 /* -*- mode: c; c-basic-offset: 8 -*- */
   2
   3 /* SNI RM driver
   4  *
   5  * Copyright (C) 2001 by James.Bottomley@HansenPartnership.com
   6 **-----------------------------------------------------------------------------
   7 **
   8 **  This program is free software; you can redistribute it and/or modify
   9 **  it under the terms of the GNU General Public License as published by
  10 **  the Free Software Foundation; either version 2 of the License, or
  11 **  (at your option) any later version.
  12 **
  13 **  This program is distributed in the hope that it will be useful,
  14 **  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 **  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 **  GNU General Public License for more details.
  17 **
  18 **  You should have received a copy of the GNU General Public License
  19 **  along with this program; if not, write to the Free Software
  20 **  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21 **
  22 **-----------------------------------------------------------------------------
  23  */
  24
  25 /*
  26  * Based on lasi700.c
  27  */
  28
  29 #include <linux/kernel.h>
  30 #include <linux/module.h>
  31 #include <linux/init.h>
  32 #include <linux/types.h>
  33 #include <linux/stat.h>
  34 #include <linux/mm.h>
  35 #include <linux/blkdev.h>
  36 #include <linux/sched.h>
  37 #include <linux/ioport.h>
  38 #include <linux/dma-mapping.h>
  39 #include <linux/platform_device.h>
  40
  41 #include <asm/page.h>
  42 #include <asm/pgtable.h>
  43 #include <asm/irq.h>
  44 #include <asm/delay.h>
  45
  46 #include <scsi/scsi_host.h>
  47 #include <scsi/scsi_device.h>
  48 #include <scsi/scsi_transport.h>
  49 #include <scsi/scsi_transport_spi.h>
  50
  51 #include "53c700.h"
  52
  53 MODULE_AUTHOR("Thomas Bogendörfer");
  54 MODULE_DESCRIPTION("SNI RM 53c710 SCSI Driver");
  55 MODULE_LICENSE("GPL");
  56
  57 #define SNIRM710_CLOCK  32
  58
  59 static struct scsi_host_template snirm710_template = {
  60         .name           = "SNI RM SCSI 53c710",
  61         .proc_name      = "snirm_53c710",
  62         .this_id        = 7,
  63         .module         = THIS_MODULE,
  64 };
  65
  66 static int __init snirm710_probe(struct platform_device *dev)
  67 {
  68         unsigned long base;
  69         struct NCR_700_Host_Parameters *hostdata;
  70         struct Scsi_Host *host;
  71         struct  resource *res;
  72
  73         res = platform_get_resource(dev, IORESOURCE_MEM, 0);
  74         if (!res)
  75                 return -ENODEV;
  76
  77         base = res->start;
  78         hostdata = kzalloc(sizeof(*hostdata), GFP_KERNEL);
  79         if (!hostdata) {
  80                 printk(KERN_ERR "%s: Failed to allocate host data\n",
  81                        dev->dev.bus_id);
  82                 return -ENOMEM;
  83         }
  84
  85         hostdata->dev = &dev->dev;
  86         dma_set_mask(&dev->dev, DMA_32BIT_MASK);
  87         hostdata->base = ioremap_nocache(base, 0x100);
  88         hostdata->differential = 0;
  89
  90         hostdata->clock = SNIRM710_CLOCK;
  91         hostdata->force_le_on_be = 1;
  92         hostdata->chip710 = 1;
  93         hostdata->burst_length = 4;
  94
  95         host = NCR_700_detect(&snirm710_template, hostdata, &dev->dev);
  96         if (!host)
  97                 goto out_kfree;
  98         host->this_id = 7;
  99         host->base = base;
 100         host->irq = platform_get_irq(dev, 0);
 101         if(request_irq(host->irq, NCR_700_intr, IRQF_SHARED, "snirm710", host)) {
 102                 printk(KERN_ERR "snirm710: request_irq failed!\n");
 103                 goto out_put_host;
 104         }
 105
 106         dev_set_drvdata(&dev->dev, host);
 107         scsi_scan_host(host);
 108
 109         return 0;
 110
 111  out_put_host:
 112         scsi_host_put(host);
 113  out_kfree:
 114         iounmap(hostdata->base);
 115         kfree(hostdata);
 116         return -ENODEV;
 117 }
 118
 119 static int __exit snirm710_driver_remove(struct platform_device *dev)
 120 {
 121         struct Scsi_Host *host = dev_get_drvdata(&dev->dev);
 122         struct NCR_700_Host_Parameters *hostdata =
 123                 (struct NCR_700_Host_Parameters *)host->hostdata[0];
 124
 125         scsi_remove_host(host);
 126         NCR_700_release(host);
 127         free_irq(host->irq, host);
 128         iounmap(hostdata->base);
 129         kfree(hostdata);
 130
 131         return 0;
 132 }
 133
 134 static struct platform_driver snirm710_driver = {
 135         .probe  = snirm710_probe,
 136         .remove = __devexit_p(snirm710_driver_remove),
 137         .driver = {
 138                 .name   = "snirm_53c710",
 139         },
 140 };
 141
 142 static int __init snirm710_init(void)
 143 {
 144         return platform_driver_register(&snirm710_driver);
 145 }
 146
 147 static void __exit snirm710_exit(void)
 148 {
 149         platform_driver_unregister(&snirm710_driver);
 150 }
 151
 152 module_init(snirm710_init);
 153 module_exit(snirm710_exit);