release/src-rt-6.x.4708/linux/linux-2.6.36/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/slab.h>
  34 #include <linux/stat.h>
  35 #include <linux/mm.h>
  36 #include <linux/blkdev.h>
  37 #include <linux/sched.h>
  38 #include <linux/ioport.h>
  39 #include <linux/dma-mapping.h>
  40 #include <linux/platform_device.h>
  41
  42 #include <asm/page.h>
  43 #include <asm/pgtable.h>
  44 #include <asm/irq.h>
  45 #include <asm/delay.h>
  46
  47 #include <scsi/scsi_host.h>
  48 #include <scsi/scsi_device.h>
  49 #include <scsi/scsi_transport.h>
  50 #include <scsi/scsi_transport_spi.h>
  51
  52 #include "53c700.h"
  53
  54 MODULE_AUTHOR("Thomas Bogendörfer");
  55 MODULE_DESCRIPTION("SNI RM 53c710 SCSI Driver");
  56 MODULE_LICENSE("GPL");
  57 MODULE_ALIAS("platform:snirm_53c710");
  58
  59 #define SNIRM710_CLOCK  32
  60
  61 static struct scsi_host_template snirm710_template = {
  62         .name           = "SNI RM SCSI 53c710",
  63         .proc_name      = "snirm_53c710",
  64         .this_id        = 7,
  65         .module         = THIS_MODULE,
  66 };
  67
  68 static int __devinit snirm710_probe(struct platform_device *dev)
  69 {
  70         unsigned long base;
  71         struct NCR_700_Host_Parameters *hostdata;
  72         struct Scsi_Host *host;
  73         struct  resource *res;
  74
  75         res = platform_get_resource(dev, IORESOURCE_MEM, 0);
  76         if (!res)
  77                 return -ENODEV;
  78
  79         base = res->start;
  80         hostdata = kzalloc(sizeof(*hostdata), GFP_KERNEL);
  81         if (!hostdata) {
  82                 dev_printk(KERN_ERR, dev, "Failed to allocate host data\n");
  83                 return -ENOMEM;
  84         }
  85
  86         hostdata->dev = &dev->dev;
  87         dma_set_mask(&dev->dev, DMA_BIT_MASK(32));
  88         hostdata->base = ioremap_nocache(base, 0x100);
  89         hostdata->differential = 0;
  90
  91         hostdata->clock = SNIRM710_CLOCK;
  92         hostdata->force_le_on_be = 1;
  93         hostdata->chip710 = 1;
  94         hostdata->burst_length = 4;
  95
  96         host = NCR_700_detect(&snirm710_template, hostdata, &dev->dev);
  97         if (!host)
  98                 goto out_kfree;
  99         host->this_id = 7;
 100         host->base = base;
 101         host->irq = platform_get_irq(dev, 0);
 102         if(request_irq(host->irq, NCR_700_intr, IRQF_SHARED, "snirm710", host)) {
 103                 printk(KERN_ERR "snirm710: request_irq failed!\n");
 104                 goto out_put_host;
 105         }
 106
 107         dev_set_drvdata(&dev->dev, host);
 108         scsi_scan_host(host);
 109
 110         return 0;
 111
 112  out_put_host:
 113         scsi_host_put(host);
 114  out_kfree:
 115         iounmap(hostdata->base);
 116         kfree(hostdata);
 117         return -ENODEV;
 118 }
 119
 120 static int __exit snirm710_driver_remove(struct platform_device *dev)
 121 {
 122         struct Scsi_Host *host = dev_get_drvdata(&dev->dev);
 123         struct NCR_700_Host_Parameters *hostdata =
 124                 (struct NCR_700_Host_Parameters *)host->hostdata[0];
 125
 126         scsi_remove_host(host);
 127         NCR_700_release(host);
 128         free_irq(host->irq, host);
 129         iounmap(hostdata->base);
 130         kfree(hostdata);
 131
 132         return 0;
 133 }
 134
 135 static struct platform_driver snirm710_driver = {
 136         .probe  = snirm710_probe,
 137         .remove = __devexit_p(snirm710_driver_remove),
 138         .driver = {
 139                 .name   = "snirm_53c710",
 140                 .owner  = THIS_MODULE,
 141         },
 142 };
 143
 144 static int __init snirm710_init(void)
 145 {
 146         return platform_driver_register(&snirm710_driver);
 147 }
 148
 149 static void __exit snirm710_exit(void)
 150 {
 151         platform_driver_unregister(&snirm710_driver);
 152 }
 153
 154 module_init(snirm710_init);
 155 module_exit(snirm710_exit);