linux/drivers/scsi/sni_53c710.c
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   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
  54MODULE_AUTHOR("Thomas Bogendörfer");
  55MODULE_DESCRIPTION("SNI RM 53c710 SCSI Driver");
  56MODULE_LICENSE("GPL");
  57MODULE_ALIAS("platform:snirm_53c710");
  58
  59#define SNIRM710_CLOCK  32
  60
  61static 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
  68static int 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
 120static 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
 135static struct platform_driver snirm710_driver = {
 136        .probe  = snirm710_probe,
 137        .remove = snirm710_driver_remove,
 138        .driver = {
 139                .name   = "snirm_53c710",
 140                .owner  = THIS_MODULE,
 141        },
 142};
 143
 144static int __init snirm710_init(void)
 145{
 146        return platform_driver_register(&snirm710_driver);
 147}
 148
 149static void __exit snirm710_exit(void)
 150{
 151        platform_driver_unregister(&snirm710_driver);
 152}
 153
 154module_init(snirm710_init);
 155module_exit(snirm710_exit);
 156
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