linux/drivers/scsi/lasi700.c
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   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
  59MODULE_AUTHOR("James Bottomley");
  60MODULE_DESCRIPTION("lasi700 SCSI Driver");
  61MODULE_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
  84static struct parisc_device_id lasi700_ids[] = {
  85        LASI700_ID_TABLE,
  86        LASI710_ID_TABLE,
  87        { 0 }
  88};
  89
  90static struct scsi_host_template lasi700_template = {
  91        .name           = "LASI SCSI 53c700",
  92        .proc_name      = "lasi700",
  93        .this_id        = 7,
  94        .module         = THIS_MODULE,
  95};
  96MODULE_DEVICE_TABLE(parisc, lasi700_ids);
  97
  98static int __init
  99lasi700_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
 151static int __exit
 152lasi700_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
 167static struct parisc_driver lasi700_driver = {
 168        .name =         "lasi_scsi",
 169        .id_table =     lasi700_ids,
 170        .probe =        lasi700_probe,
 171        .remove =       lasi700_driver_remove,
 172};
 173
 174static int __init
 175lasi700_init(void)
 176{
 177        return register_parisc_driver(&lasi700_driver);
 178}
 179
 180static void __exit
 181lasi700_exit(void)
 182{
 183        unregister_parisc_driver(&lasi700_driver);
 184}
 185
 186module_init(lasi700_init);
 187module_exit(lasi700_exit);
 188
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