drivers/scsi/lasi700.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /* -*- mode: c; c-basic-offset: 8 -*- */
   3
   4 /* PARISC LASI driver for the 53c700 chip
   5  *
   6  * Copyright (C) 2001 by James.Bottomley@HansenPartnership.com
   7 **-----------------------------------------------------------------------------
   8 **
   9 **
  10 **-----------------------------------------------------------------------------
  11  */
  12
  13 /*
  14  * Many thanks to Richard Hirst <rhirst@linuxcare.com> for patiently
  15  * debugging this driver on the parisc architecture and suggesting
  16  * many improvements and bug fixes.
  17  *
  18  * Thanks also go to Linuxcare Inc. for providing several PARISC
  19  * machines for me to debug the driver on.
  20  */
  21
  22 #include <linux/kernel.h>
  23 #include <linux/module.h>
  24 #include <linux/init.h>
  25 #include <linux/types.h>
  26 #include <linux/stat.h>
  27 #include <linux/mm.h>
  28 #include <linux/blkdev.h>
  29 #include <linux/ioport.h>
  30 #include <linux/dma-mapping.h>
  31 #include <linux/slab.h>
  32
  33 #include <asm/page.h>
  34 #include <asm/pgtable.h>
  35 #include <asm/irq.h>
  36 #include <asm/hardware.h>
  37 #include <asm/parisc-device.h>
  38 #include <asm/delay.h>
  39
  40 #include <scsi/scsi_host.h>
  41 #include <scsi/scsi_device.h>
  42 #include <scsi/scsi_transport.h>
  43 #include <scsi/scsi_transport_spi.h>
  44
  45 #include "53c700.h"
  46
  47 MODULE_AUTHOR("James Bottomley");
  48 MODULE_DESCRIPTION("lasi700 SCSI Driver");
  49 MODULE_LICENSE("GPL");
  50
  51 #define LASI_700_SVERSION 0x00071
  52 #define LASI_710_SVERSION 0x00082
  53
  54 #define LASI700_ID_TABLE {                      \
  55         .hw_type        = HPHW_FIO,             \
  56         .sversion       = LASI_700_SVERSION,    \
  57         .hversion       = HVERSION_ANY_ID,      \
  58         .hversion_rev   = HVERSION_REV_ANY_ID,  \
  59 }
  60
  61 #define LASI710_ID_TABLE {                      \
  62         .hw_type        = HPHW_FIO,             \
  63         .sversion       = LASI_710_SVERSION,    \
  64         .hversion       = HVERSION_ANY_ID,      \
  65         .hversion_rev   = HVERSION_REV_ANY_ID,  \
  66 }
  67
  68 #define LASI700_CLOCK   25
  69 #define LASI710_CLOCK   40
  70 #define LASI_SCSI_CORE_OFFSET 0x100
  71
  72 static const struct parisc_device_id lasi700_ids[] __initconst = {
  73         LASI700_ID_TABLE,
  74         LASI710_ID_TABLE,
  75         { 0 }
  76 };
  77
  78 static struct scsi_host_template lasi700_template = {
  79         .name           = "LASI SCSI 53c700",
  80         .proc_name      = "lasi700",
  81         .this_id        = 7,
  82         .module         = THIS_MODULE,
  83 };
  84 MODULE_DEVICE_TABLE(parisc, lasi700_ids);
  85
  86 static int __init
  87 lasi700_probe(struct parisc_device *dev)
  88 {
  89         unsigned long base = dev->hpa.start + LASI_SCSI_CORE_OFFSET;
  90         struct NCR_700_Host_Parameters *hostdata;
  91         struct Scsi_Host *host;
  92
  93         hostdata = kzalloc(sizeof(*hostdata), GFP_KERNEL);
  94         if (!hostdata) {
  95                 dev_printk(KERN_ERR, &dev->dev, "Failed to allocate host data\n");
  96                 return -ENOMEM;
  97         }
  98
  99         hostdata->dev = &dev->dev;
 100         dma_set_mask(&dev->dev, DMA_BIT_MASK(32));
 101         hostdata->base = ioremap_nocache(base, 0x100);
 102         hostdata->differential = 0;
 103
 104         if (dev->id.sversion == LASI_700_SVERSION) {
 105                 hostdata->clock = LASI700_CLOCK;
 106                 hostdata->force_le_on_be = 1;
 107         } else {
 108                 hostdata->clock = LASI710_CLOCK;
 109                 hostdata->force_le_on_be = 0;
 110                 hostdata->chip710 = 1;
 111                 hostdata->dmode_extra = DMODE_FC2;
 112                 hostdata->burst_length = 8;
 113         }
 114
 115         host = NCR_700_detect(&lasi700_template, hostdata, &dev->dev);
 116         if (!host)
 117                 goto out_kfree;
 118         host->this_id = 7;
 119         host->base = base;
 120         host->irq = dev->irq;
 121         if(request_irq(dev->irq, NCR_700_intr, IRQF_SHARED, "lasi700", host)) {
 122                 printk(KERN_ERR "lasi700: request_irq failed!\n");
 123                 goto out_put_host;
 124         }
 125
 126         dev_set_drvdata(&dev->dev, host);
 127         scsi_scan_host(host);
 128
 129         return 0;
 130
 131  out_put_host:
 132         scsi_host_put(host);
 133  out_kfree:
 134         iounmap(hostdata->base);
 135         kfree(hostdata);
 136         return -ENODEV;
 137 }
 138
 139 static int __exit
 140 lasi700_driver_remove(struct parisc_device *dev)
 141 {
 142         struct Scsi_Host *host = dev_get_drvdata(&dev->dev);
 143         struct NCR_700_Host_Parameters *hostdata =
 144                 (struct NCR_700_Host_Parameters *)host->hostdata[0];
 145
 146         scsi_remove_host(host);
 147         NCR_700_release(host);
 148         free_irq(host->irq, host);
 149         iounmap(hostdata->base);
 150         kfree(hostdata);
 151
 152         return 0;
 153 }
 154
 155 static struct parisc_driver lasi700_driver __refdata = {
 156         .name =         "lasi_scsi",
 157         .id_table =     lasi700_ids,
 158         .probe =        lasi700_probe,
 159         .remove =       __exit_p(lasi700_driver_remove),
 160 };
 161
 162 static int __init
 163 lasi700_init(void)
 164 {
 165         return register_parisc_driver(&lasi700_driver);
 166 }
 167
 168 static void __exit
 169 lasi700_exit(void)
 170 {
 171         unregister_parisc_driver(&lasi700_driver);
 172 }
 173
 174 module_init(lasi700_init);
 175 module_exit(lasi700_exit);