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Linux/drivers/scsi/a4000t.c

  1 /*
  2  * Detection routine for the NCR53c710 based Amiga SCSI Controllers for Linux.
  3  *              Amiga Technologies A4000T SCSI controller.
  4  *
  5  * Written 1997 by Alan Hourihane <alanh@fairlite.demon.co.uk>
  6  * plus modifications of the 53c7xx.c driver to support the Amiga.
  7  *
  8  * Rewritten to use 53c700.c by Kars de Jong <jongk@linux-m68k.org>
  9  */
 10 
 11 #include <linux/module.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/amigahw.h>
 17 #include <asm/amigaints.h>
 18 #include <scsi/scsi_host.h>
 19 #include <scsi/scsi_transport_spi.h>
 20 
 21 #include "53c700.h"
 22 
 23 
 24 static struct scsi_host_template a4000t_scsi_driver_template = {
 25         .name           = "A4000T builtin SCSI",
 26         .proc_name      = "A4000t",
 27         .this_id        = 7,
 28         .module         = THIS_MODULE,
 29 };
 30 
 31 
 32 #define A4000T_SCSI_OFFSET      0x40
 33 
 34 static int __init amiga_a4000t_scsi_probe(struct platform_device *pdev)
 35 {
 36         struct resource *res;
 37         phys_addr_t scsi_addr;
 38         struct NCR_700_Host_Parameters *hostdata;
 39         struct Scsi_Host *host;
 40 
 41         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 42         if (!res)
 43                 return -ENODEV;
 44 
 45         if (!request_mem_region(res->start, resource_size(res),
 46                                 "A4000T builtin SCSI"))
 47                 return -EBUSY;
 48 
 49         hostdata = kzalloc(sizeof(struct NCR_700_Host_Parameters),
 50                            GFP_KERNEL);
 51         if (!hostdata) {
 52                 dev_err(&pdev->dev, "Failed to allocate host data\n");
 53                 goto out_release;
 54         }
 55 
 56         scsi_addr = res->start + A4000T_SCSI_OFFSET;
 57 
 58         /* Fill in the required pieces of hostdata */
 59         hostdata->base = ZTWO_VADDR(scsi_addr);
 60         hostdata->clock = 50;
 61         hostdata->chip710 = 1;
 62         hostdata->dmode_extra = DMODE_FC2;
 63         hostdata->dcntl_extra = EA_710;
 64 
 65         /* and register the chip */
 66         host = NCR_700_detect(&a4000t_scsi_driver_template, hostdata,
 67                               &pdev->dev);
 68         if (!host) {
 69                 dev_err(&pdev->dev,
 70                         "No host detected; board configuration problem?\n");
 71                 goto out_free;
 72         }
 73 
 74         host->this_id = 7;
 75         host->base = scsi_addr;
 76         host->irq = IRQ_AMIGA_PORTS;
 77 
 78         if (request_irq(host->irq, NCR_700_intr, IRQF_SHARED, "a4000t-scsi",
 79                         host)) {
 80                 dev_err(&pdev->dev, "request_irq failed\n");
 81                 goto out_put_host;
 82         }
 83 
 84         platform_set_drvdata(pdev, host);
 85         scsi_scan_host(host);
 86         return 0;
 87 
 88  out_put_host:
 89         scsi_host_put(host);
 90  out_free:
 91         kfree(hostdata);
 92  out_release:
 93         release_mem_region(res->start, resource_size(res));
 94         return -ENODEV;
 95 }
 96 
 97 static int __exit amiga_a4000t_scsi_remove(struct platform_device *pdev)
 98 {
 99         struct Scsi_Host *host = platform_get_drvdata(pdev);
100         struct NCR_700_Host_Parameters *hostdata = shost_priv(host);
101         struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
102 
103         scsi_remove_host(host);
104         NCR_700_release(host);
105         kfree(hostdata);
106         free_irq(host->irq, host);
107         release_mem_region(res->start, resource_size(res));
108         return 0;
109 }
110 
111 static struct platform_driver amiga_a4000t_scsi_driver = {
112         .remove = __exit_p(amiga_a4000t_scsi_remove),
113         .driver   = {
114                 .name   = "amiga-a4000t-scsi",
115                 .owner  = THIS_MODULE,
116         },
117 };
118 
119 module_platform_driver_probe(amiga_a4000t_scsi_driver, amiga_a4000t_scsi_probe);
120 
121 MODULE_AUTHOR("Alan Hourihane <alanh@fairlite.demon.co.uk> / "
122               "Kars de Jong <jongk@linux-m68k.org>");
123 MODULE_DESCRIPTION("Amiga A4000T NCR53C710 driver");
124 MODULE_LICENSE("GPL");
125 MODULE_ALIAS("platform:amiga-a4000t-scsi");
126 

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