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