drivers/scsi/bvme6000_scsi.c

   1 /*
   2  * Detection routine for the NCR53c710 based BVME6000 SCSI Controllers for Linux.
   3  *
   4  * Based on work by Alan Hourihane and Kars de Jong
   5  *
   6  * Rewritten to use 53c700.c by Richard Hirst <richard@sleepie.demon.co.uk>
   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 <asm/bvme6000hw.h>
  16 #include <scsi/scsi_host.h>
  17 #include <scsi/scsi_device.h>
  18 #include <scsi/scsi_transport.h>
  19 #include <scsi/scsi_transport_spi.h>
  20
  21 #include "53c700.h"
  22
  23 MODULE_AUTHOR("Richard Hirst <richard@sleepie.demon.co.uk>");
  24 MODULE_DESCRIPTION("BVME6000 NCR53C710 driver");
  25 MODULE_LICENSE("GPL");
  26
  27 static struct scsi_host_template bvme6000_scsi_driver_template = {
  28         .name                   = "BVME6000 NCR53c710 SCSI",
  29         .proc_name              = "BVME6000",
  30         .this_id                = 7,
  31         .module                 = THIS_MODULE,
  32 };
  33
  34 static struct platform_device *bvme6000_scsi_device;
  35
  36 static __devinit int
  37 bvme6000_probe(struct device *dev)
  38 {
  39         struct Scsi_Host *host;
  40         struct NCR_700_Host_Parameters *hostdata;
  41
  42         if (!MACH_IS_BVME6000)
  43                 goto out;
  44
  45         hostdata = kzalloc(sizeof(struct NCR_700_Host_Parameters), GFP_KERNEL);
  46         if (!hostdata) {
  47                 printk(KERN_ERR "bvme6000-scsi: "
  48                                 "Failed to allocate host data\n");
  49                 goto out;
  50         }
  51
  52         /* Fill in the required pieces of hostdata */
  53         hostdata->base = (void __iomem *)BVME_NCR53C710_BASE;
  54         hostdata->clock = 40;   /* XXX - depends on the CPU clock! */
  55         hostdata->chip710 = 1;
  56         hostdata->dmode_extra = DMODE_FC2;
  57         hostdata->dcntl_extra = EA_710;
  58         hostdata->ctest7_extra = CTEST7_TT1;
  59
  60         /* and register the chip */
  61         host = NCR_700_detect(&bvme6000_scsi_driver_template, hostdata, dev);
  62         if (!host) {
  63                 printk(KERN_ERR "bvme6000-scsi: No host detected; "
  64                                 "board configuration problem?\n");
  65                 goto out_free;
  66         }
  67         host->base = BVME_NCR53C710_BASE;
  68         host->this_id = 7;
  69         host->irq = BVME_IRQ_SCSI;
  70         if (request_irq(BVME_IRQ_SCSI, NCR_700_intr, 0, "bvme6000-scsi",
  71                         host)) {
  72                 printk(KERN_ERR "bvme6000-scsi: request_irq failed\n");
  73                 goto out_put_host;
  74         }
  75
  76         dev_set_drvdata(dev, host);
  77         scsi_scan_host(host);
  78
  79         return 0;
  80
  81  out_put_host:
  82         scsi_host_put(host);
  83  out_free:
  84         kfree(hostdata);
  85  out:
  86         return -ENODEV;
  87 }
  88
  89 static __devexit int
  90 bvme6000_device_remove(struct device *dev)
  91 {
  92         struct Scsi_Host *host = dev_get_drvdata(dev);
  93         struct NCR_700_Host_Parameters *hostdata = shost_priv(host);
  94
  95         scsi_remove_host(host);
  96         NCR_700_release(host);
  97         kfree(hostdata);
  98         free_irq(host->irq, host);
  99
 100         return 0;
 101 }
 102
 103 static struct device_driver bvme6000_scsi_driver = {
 104         .name   = "bvme6000-scsi",
 105         .bus    = &platform_bus_type,
 106         .probe  = bvme6000_probe,
 107         .remove = __devexit_p(bvme6000_device_remove),
 108 };
 109
 110 static int __init bvme6000_scsi_init(void)
 111 {
 112         int err;
 113
 114         err = driver_register(&bvme6000_scsi_driver);
 115         if (err)
 116                 return err;
 117
 118         bvme6000_scsi_device = platform_device_register_simple("bvme6000-scsi",
 119                                                                -1, NULL, 0);
 120         if (IS_ERR(bvme6000_scsi_device)) {
 121                 driver_unregister(&bvme6000_scsi_driver);
 122                 return PTR_ERR(bvme6000_scsi_device);
 123         }
 124
 125         return 0;
 126 }
 127
 128 static void __exit bvme6000_scsi_exit(void)
 129 {
 130         platform_device_unregister(bvme6000_scsi_device);
 131         driver_unregister(&bvme6000_scsi_driver);
 132 }
 133
 134 module_init(bvme6000_scsi_init);
 135 module_exit(bvme6000_scsi_exit);