drivers/scsi/lasi700.c

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