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Linux/drivers/scsi/mvme16x_scsi.c

  1 /*
  2  * Detection routine for the NCR53c710 based MVME16x SCSI Controllers for Linux.
  3  *
  4  * Based on work by Alan Hourihane
  5  *
  6  * Rewritten to use 53c700.c by Kars de Jong <jongk@linux-m68k.org>
  7  */
  8 
  9 #include <linux/module.h>
 10 #include <linux/blkdev.h>
 11 #include <linux/device.h>
 12 #include <linux/platform_device.h>
 13 #include <linux/init.h>
 14 #include <linux/interrupt.h>
 15 #include <linux/slab.h>
 16 #include <asm/mvme16xhw.h>
 17 #include <scsi/scsi_host.h>
 18 #include <scsi/scsi_device.h>
 19 #include <scsi/scsi_transport.h>
 20 #include <scsi/scsi_transport_spi.h>
 21 
 22 #include "53c700.h"
 23 
 24 MODULE_AUTHOR("Kars de Jong <jongk@linux-m68k.org>");
 25 MODULE_DESCRIPTION("MVME16x NCR53C710 driver");
 26 MODULE_LICENSE("GPL");
 27 
 28 static struct scsi_host_template mvme16x_scsi_driver_template = {
 29         .name                   = "MVME16x NCR53c710 SCSI",
 30         .proc_name              = "MVME16x",
 31         .this_id                = 7,
 32         .module                 = THIS_MODULE,
 33 };
 34 
 35 static struct platform_device *mvme16x_scsi_device;
 36 
 37 static int mvme16x_probe(struct platform_device *dev)
 38 {
 39         struct Scsi_Host * host = NULL;
 40         struct NCR_700_Host_Parameters *hostdata;
 41 
 42         if (!MACH_IS_MVME16x)
 43                 goto out;
 44 
 45         if (mvme16x_config & MVME16x_CONFIG_NO_SCSICHIP) {
 46                 printk(KERN_INFO "mvme16x-scsi: detection disabled, "
 47                                  "SCSI chip not present\n");
 48                 goto out;
 49         }
 50 
 51         hostdata = kzalloc(sizeof(struct NCR_700_Host_Parameters), GFP_KERNEL);
 52         if (hostdata == NULL) {
 53                 printk(KERN_ERR "mvme16x-scsi: "
 54                                 "Failed to allocate host data\n");
 55                 goto out;
 56         }
 57 
 58         /* Fill in the required pieces of hostdata */
 59         hostdata->base = (void __iomem *)0xfff47000UL;
 60         hostdata->clock = 50;   /* XXX - depends on the CPU clock! */
 61         hostdata->chip710 = 1;
 62         hostdata->dmode_extra = DMODE_FC2;
 63         hostdata->dcntl_extra = EA_710;
 64         hostdata->ctest7_extra = CTEST7_TT1;
 65 
 66         /* and register the chip */
 67         host = NCR_700_detect(&mvme16x_scsi_driver_template, hostdata,
 68                               &dev->dev);
 69         if (!host) {
 70                 printk(KERN_ERR "mvme16x-scsi: No host detected; "
 71                                 "board configuration problem?\n");
 72                 goto out_free;
 73         }
 74         host->this_id = 7;
 75         host->base = 0xfff47000UL;
 76         host->irq = MVME16x_IRQ_SCSI;
 77         if (request_irq(host->irq, NCR_700_intr, 0, "mvme16x-scsi", host)) {
 78                 printk(KERN_ERR "mvme16x-scsi: request_irq failed\n");
 79                 goto out_put_host;
 80         }
 81 
 82         /* Enable scsi chip ints */
 83         {
 84                 volatile unsigned long v;
 85 
 86                 /* Enable scsi interrupts at level 4 in PCCchip2 */
 87                 v = in_be32(0xfff4202c);
 88                 v = (v & ~0xff) | 0x10 | 4;
 89                 out_be32(0xfff4202c, v);
 90         }
 91 
 92         platform_set_drvdata(dev, host);
 93         scsi_scan_host(host);
 94 
 95         return 0;
 96 
 97  out_put_host:
 98         scsi_host_put(host);
 99  out_free:
100         kfree(hostdata);
101  out:
102         return -ENODEV;
103 }
104 
105 static int mvme16x_device_remove(struct platform_device *dev)
106 {
107         struct Scsi_Host *host = platform_get_drvdata(dev);
108         struct NCR_700_Host_Parameters *hostdata = shost_priv(host);
109 
110         /* Disable scsi chip ints */
111         {
112                 volatile unsigned long v;
113 
114                 v = in_be32(0xfff4202c);
115                 v &= ~0x10;
116                 out_be32(0xfff4202c, v);
117         }
118         scsi_remove_host(host);
119         NCR_700_release(host);
120         kfree(hostdata);
121         free_irq(host->irq, host);
122 
123         return 0;
124 }
125 
126 static struct platform_driver mvme16x_scsi_driver = {
127         .driver = {
128                 .name           = "mvme16x-scsi",
129                 .owner          = THIS_MODULE,
130         },
131         .probe          = mvme16x_probe,
132         .remove         = mvme16x_device_remove,
133 };
134 
135 static int __init mvme16x_scsi_init(void)
136 {
137         int err;
138 
139         err = platform_driver_register(&mvme16x_scsi_driver);
140         if (err)
141                 return err;
142 
143         mvme16x_scsi_device = platform_device_register_simple("mvme16x-scsi",
144                                                               -1, NULL, 0);
145         if (IS_ERR(mvme16x_scsi_device)) {
146                 platform_driver_unregister(&mvme16x_scsi_driver);
147                 return PTR_ERR(mvme16x_scsi_device);
148         }
149 
150         return 0;
151 }
152 
153 static void __exit mvme16x_scsi_exit(void)
154 {
155         platform_device_unregister(mvme16x_scsi_device);
156         platform_driver_unregister(&mvme16x_scsi_driver);
157 }
158 
159 module_init(mvme16x_scsi_init);
160 module_exit(mvme16x_scsi_exit);
161 

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