drivers/scsi/sni_53c710.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2
   3 /* SNI RM driver
   4  *
   5  * Copyright (C) 2001 by James.Bottomley@HansenPartnership.com
   6 **-----------------------------------------------------------------------------
   7 **
   8 **
   9 **-----------------------------------------------------------------------------
  10  */
  11
  12 /*
  13  * Based on lasi700.c
  14  */
  15
  16 #include <linux/kernel.h>
  17 #include <linux/module.h>
  18 #include <linux/init.h>
  19 #include <linux/types.h>
  20 #include <linux/slab.h>
  21 #include <linux/stat.h>
  22 #include <linux/mm.h>
  23 #include <linux/blkdev.h>
  24 #include <linux/sched.h>
  25 #include <linux/ioport.h>
  26 #include <linux/dma-mapping.h>
  27 #include <linux/platform_device.h>
  28
  29 #include <asm/page.h>
  30 #include <asm/irq.h>
  31 #include <asm/delay.h>
  32
  33 #include <scsi/scsi_host.h>
  34 #include <scsi/scsi_device.h>
  35 #include <scsi/scsi_transport.h>
  36 #include <scsi/scsi_transport_spi.h>
  37
  38 #include "53c700.h"
  39
  40 MODULE_AUTHOR("Thomas Bogendörfer");
  41 MODULE_DESCRIPTION("SNI RM 53c710 SCSI Driver");
  42 MODULE_LICENSE("GPL");
  43 MODULE_ALIAS("platform:snirm_53c710");
  44
  45 #define SNIRM710_CLOCK  32
  46
  47 static struct scsi_host_template snirm710_template = {
  48         .name           = "SNI RM SCSI 53c710",
  49         .proc_name      = "snirm_53c710",
  50         .this_id        = 7,
  51         .module         = THIS_MODULE,
  52 };
  53
  54 static int snirm710_probe(struct platform_device *dev)
  55 {
  56         unsigned long base;
  57         struct NCR_700_Host_Parameters *hostdata;
  58         struct Scsi_Host *host;
  59         struct  resource *res;
  60         int rc;
  61
  62         res = platform_get_resource(dev, IORESOURCE_MEM, 0);
  63         if (!res)
  64                 return -ENODEV;
  65
  66         base = res->start;
  67         hostdata = kzalloc(sizeof(*hostdata), GFP_KERNEL);
  68         if (!hostdata)
  69                 return -ENOMEM;
  70
  71         hostdata->dev = &dev->dev;
  72         dma_set_mask(&dev->dev, DMA_BIT_MASK(32));
  73         hostdata->base = ioremap(base, 0x100);
  74         hostdata->differential = 0;
  75
  76         hostdata->clock = SNIRM710_CLOCK;
  77         hostdata->force_le_on_be = 1;
  78         hostdata->chip710 = 1;
  79         hostdata->burst_length = 4;
  80
  81         host = NCR_700_detect(&snirm710_template, hostdata, &dev->dev);
  82         if (!host)
  83                 goto out_kfree;
  84         host->this_id = 7;
  85         host->base = base;
  86         host->irq = rc = platform_get_irq(dev, 0);
  87         if (rc < 0)
  88                 goto out_put_host;
  89         if(request_irq(host->irq, NCR_700_intr, IRQF_SHARED, "snirm710", host)) {
  90                 printk(KERN_ERR "snirm710: request_irq failed!\n");
  91                 goto out_put_host;
  92         }
  93
  94         dev_set_drvdata(&dev->dev, host);
  95         scsi_scan_host(host);
  96
  97         return 0;
  98
  99  out_put_host:
 100         scsi_host_put(host);
 101  out_kfree:
 102         iounmap(hostdata->base);
 103         kfree(hostdata);
 104         return -ENODEV;
 105 }
 106
 107 static void snirm710_driver_remove(struct platform_device *dev)
 108 {
 109         struct Scsi_Host *host = dev_get_drvdata(&dev->dev);
 110         struct NCR_700_Host_Parameters *hostdata =
 111                 (struct NCR_700_Host_Parameters *)host->hostdata[0];
 112
 113         scsi_remove_host(host);
 114         NCR_700_release(host);
 115         free_irq(host->irq, host);
 116         iounmap(hostdata->base);
 117         kfree(hostdata);
 118 }
 119
 120 static struct platform_driver snirm710_driver = {
 121         .probe  = snirm710_probe,
 122         .remove = snirm710_driver_remove,
 123         .driver = {
 124                 .name   = "snirm_53c710",
 125         },
 126 };
 127 module_platform_driver(snirm710_driver);