drivers/scsi/lasi700.c

   1 /* -*- mode: c; c-basic-offset: 8 -*- */
   2
   3 /* PARISC LASI driver for the 53c700 chip
   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  * Many thanks to Richard Hirst <rhirst@linuxcare.com> for patiently
  27  * debugging this driver on the parisc architecture and suggesting
  28  * many improvements and bug fixes.
  29  *
  30  * Thanks also go to Linuxcare Inc. for providing several PARISC
  31  * machines for me to debug the driver on.
  32  */
  33
  34 #include <linux/kernel.h>
  35 #include <linux/module.h>
  36 #include <linux/init.h>
  37 #include <linux/types.h>
  38 #include <linux/stat.h>
  39 #include <linux/mm.h>
  40 #include <linux/blkdev.h>
  41 #include <linux/ioport.h>
  42 #include <linux/dma-mapping.h>
  43
  44 #include <asm/page.h>
  45 #include <asm/pgtable.h>
  46 #include <asm/irq.h>
  47 #include <asm/hardware.h>
  48 #include <asm/parisc-device.h>
  49 #include <asm/delay.h>
  50
  51 #include <scsi/scsi_host.h>
  52 #include <scsi/scsi_device.h>
  53 #include <scsi/scsi_transport.h>
  54 #include <scsi/scsi_transport_spi.h>
  55
  56 #include "53c700.h"
  57
  58 MODULE_AUTHOR("James Bottomley");
  59 MODULE_DESCRIPTION("lasi700 SCSI Driver");
  60 MODULE_LICENSE("GPL");
  61
  62 #define LASI_700_SVERSION 0x00071
  63 #define LASI_710_SVERSION 0x00082
  64
  65 #define LASI700_ID_TABLE {                      \
  66         .hw_type        = HPHW_FIO,             \
  67         .sversion       = LASI_700_SVERSION,    \
  68         .hversion       = HVERSION_ANY_ID,      \
  69         .hversion_rev   = HVERSION_REV_ANY_ID,  \
  70 }
  71
  72 #define LASI710_ID_TABLE {                      \
  73         .hw_type        = HPHW_FIO,             \
  74         .sversion       = LASI_710_SVERSION,    \
  75         .hversion       = HVERSION_ANY_ID,      \
  76         .hversion_rev   = HVERSION_REV_ANY_ID,  \
  77 }
  78
  79 #define LASI700_CLOCK   25
  80 #define LASI710_CLOCK   40
  81 #define LASI_SCSI_CORE_OFFSET 0x100
  82
  83 static struct parisc_device_id lasi700_ids[] = {
  84         LASI700_ID_TABLE,
  85         LASI710_ID_TABLE,
  86         { 0 }
  87 };
  88
  89 static struct scsi_host_template lasi700_template = {
  90         .name           = "LASI SCSI 53c700",
  91         .proc_name      = "lasi700",
  92         .this_id        = 7,
  93         .module         = THIS_MODULE,
  94 };
  95 MODULE_DEVICE_TABLE(parisc, lasi700_ids);
  96
  97 static int __init
  98 lasi700_probe(struct parisc_device *dev)
  99 {
 100         unsigned long base = dev->hpa.start + LASI_SCSI_CORE_OFFSET;
 101         struct NCR_700_Host_Parameters *hostdata;
 102         struct Scsi_Host *host;
 103
 104         hostdata = kzalloc(sizeof(*hostdata), GFP_KERNEL);
 105         if (!hostdata) {
 106                 dev_printk(KERN_ERR, &dev->dev, "Failed to allocate host data\n");
 107                 return -ENOMEM;
 108         }
 109
 110         hostdata->dev = &dev->dev;
 111         dma_set_mask(&dev->dev, DMA_BIT_MASK(32));
 112         hostdata->base = ioremap_nocache(base, 0x100);
 113         hostdata->differential = 0;
 114
 115         if (dev->id.sversion == LASI_700_SVERSION) {
 116                 hostdata->clock = LASI700_CLOCK;
 117                 hostdata->force_le_on_be = 1;
 118         } else {
 119                 hostdata->clock = LASI710_CLOCK;
 120                 hostdata->force_le_on_be = 0;
 121                 hostdata->chip710 = 1;
 122                 hostdata->dmode_extra = DMODE_FC2;
 123                 hostdata->burst_length = 8;
 124         }
 125
 126         host = NCR_700_detect(&lasi700_template, hostdata, &dev->dev);
 127         if (!host)
 128                 goto out_kfree;
 129         host->this_id = 7;
 130         host->base = base;
 131         host->irq = dev->irq;
 132         if(request_irq(dev->irq, NCR_700_intr, IRQF_SHARED, "lasi700", host)) {
 133                 printk(KERN_ERR "lasi700: request_irq failed!\n");
 134                 goto out_put_host;
 135         }
 136
 137         dev_set_drvdata(&dev->dev, host);
 138         scsi_scan_host(host);
 139
 140         return 0;
 141
 142  out_put_host:
 143         scsi_host_put(host);
 144  out_kfree:
 145         iounmap(hostdata->base);
 146         kfree(hostdata);
 147         return -ENODEV;
 148 }
 149
 150 static int __exit
 151 lasi700_driver_remove(struct parisc_device *dev)
 152 {
 153         struct Scsi_Host *host = dev_get_drvdata(&dev->dev);
 154         struct NCR_700_Host_Parameters *hostdata =
 155                 (struct NCR_700_Host_Parameters *)host->hostdata[0];
 156
 157         scsi_remove_host(host);
 158         NCR_700_release(host);
 159         free_irq(host->irq, host);
 160         iounmap(hostdata->base);
 161         kfree(hostdata);
 162
 163         return 0;
 164 }
 165
 166 static struct parisc_driver lasi700_driver = {
 167         .name =         "lasi_scsi",
 168         .id_table =     lasi700_ids,
 169         .probe =        lasi700_probe,
 170         .remove =       __devexit_p(lasi700_driver_remove),
 171 };
 172
 173 static int __init
 174 lasi700_init(void)
 175 {
 176         return register_parisc_driver(&lasi700_driver);
 177 }
 178
 179 static void __exit
 180 lasi700_exit(void)
 181 {
 182         unregister_parisc_driver(&lasi700_driver);
 183 }
 184
 185 module_init(lasi700_init);
 186 module_exit(lasi700_exit);