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Linux/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 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 = 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);
156 

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