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/irq.h>
  35 #include <asm/hardware.h>
  36 #include <asm/parisc-device.h>
  37 #include <asm/delay.h>
  38
  39 #include <scsi/scsi_host.h>
  40 #include <scsi/scsi_device.h>
  41 #include <scsi/scsi_transport.h>
  42 #include <scsi/scsi_transport_spi.h>
  43
  44 #include "53c700.h"
  45
  46 MODULE_AUTHOR("James Bottomley");
  47 MODULE_DESCRIPTION("lasi700 SCSI Driver");
  48 MODULE_LICENSE("GPL");
  49
  50 #define LASI_700_SVERSION 0x00071
  51 #define LASI_710_SVERSION 0x00082
  52
  53 #define LASI700_ID_TABLE {                      \
  54         .hw_type        = HPHW_FIO,             \
  55         .sversion       = LASI_700_SVERSION,    \
  56         .hversion       = HVERSION_ANY_ID,      \
  57         .hversion_rev   = HVERSION_REV_ANY_ID,  \
  58 }
  59
  60 #define LASI710_ID_TABLE {                      \
  61         .hw_type        = HPHW_FIO,             \
  62         .sversion       = LASI_710_SVERSION,    \
  63         .hversion       = HVERSION_ANY_ID,      \
  64         .hversion_rev   = HVERSION_REV_ANY_ID,  \
  65 }
  66
  67 #define LASI700_CLOCK   25
  68 #define LASI710_CLOCK   40
  69 #define LASI_SCSI_CORE_OFFSET 0x100
  70
  71 static const struct parisc_device_id lasi700_ids[] __initconst = {
  72         LASI700_ID_TABLE,
  73         LASI710_ID_TABLE,
  74         { 0 }
  75 };
  76
  77 static struct scsi_host_template lasi700_template = {
  78         .name           = "LASI SCSI 53c700",
  79         .proc_name      = "lasi700",
  80         .this_id        = 7,
  81         .module         = THIS_MODULE,
  82 };
  83 MODULE_DEVICE_TABLE(parisc, lasi700_ids);
  84
  85 static int __init
  86 lasi700_probe(struct parisc_device *dev)
  87 {
  88         unsigned long base = dev->hpa.start + LASI_SCSI_CORE_OFFSET;
  89         struct NCR_700_Host_Parameters *hostdata;
  90         struct Scsi_Host *host;
  91
  92         hostdata = kzalloc(sizeof(*hostdata), GFP_KERNEL);
  93         if (!hostdata) {
  94                 dev_printk(KERN_ERR, &dev->dev, "Failed to allocate host data\n");
  95                 return -ENOMEM;
  96         }
  97
  98         hostdata->dev = &dev->dev;
  99         dma_set_mask(&dev->dev, DMA_BIT_MASK(32));
 100         hostdata->base = ioremap(base, 0x100);
 101         hostdata->differential = 0;
 102
 103         if (dev->id.sversion == LASI_700_SVERSION) {
 104                 hostdata->clock = LASI700_CLOCK;
 105                 hostdata->force_le_on_be = 1;
 106         } else {
 107                 hostdata->clock = LASI710_CLOCK;
 108                 hostdata->force_le_on_be = 0;
 109                 hostdata->chip710 = 1;
 110                 hostdata->dmode_extra = DMODE_FC2;
 111                 hostdata->burst_length = 8;
 112         }
 113
 114         host = NCR_700_detect(&lasi700_template, hostdata, &dev->dev);
 115         if (!host)
 116                 goto out_kfree;
 117         host->this_id = 7;
 118         host->base = base;
 119         host->irq = dev->irq;
 120         if(request_irq(dev->irq, NCR_700_intr, IRQF_SHARED, "lasi700", host)) {
 121                 printk(KERN_ERR "lasi700: request_irq failed!\n");
 122                 goto out_put_host;
 123         }
 124
 125         dev_set_drvdata(&dev->dev, host);
 126         scsi_scan_host(host);
 127
 128         return 0;
 129
 130  out_put_host:
 131         scsi_host_put(host);
 132  out_kfree:
 133         iounmap(hostdata->base);
 134         kfree(hostdata);
 135         return -ENODEV;
 136 }
 137
 138 static int __exit
 139 lasi700_driver_remove(struct parisc_device *dev)
 140 {
 141         struct Scsi_Host *host = dev_get_drvdata(&dev->dev);
 142         struct NCR_700_Host_Parameters *hostdata =
 143                 (struct NCR_700_Host_Parameters *)host->hostdata[0];
 144
 145         scsi_remove_host(host);
 146         NCR_700_release(host);
 147         free_irq(host->irq, host);
 148         iounmap(hostdata->base);
 149         kfree(hostdata);
 150
 151         return 0;
 152 }
 153
 154 static struct parisc_driver lasi700_driver __refdata = {
 155         .name =         "lasi_scsi",
 156         .id_table =     lasi700_ids,
 157         .probe =        lasi700_probe,
 158         .remove =       __exit_p(lasi700_driver_remove),
 159 };
 160
 161 static int __init
 162 lasi700_init(void)
 163 {
 164         return register_parisc_driver(&lasi700_driver);
 165 }
 166
 167 static void __exit
 168 lasi700_exit(void)
 169 {
 170         unregister_parisc_driver(&lasi700_driver);
 171 }
 172
 173 module_init(lasi700_init);
 174 module_exit(lasi700_exit);