drivers/scsi/sim710.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * sim710.c - Copyright (C) 1999 Richard Hirst <richard@sleepie.demon.co.uk>
   4  *
   5  *----------------------------------------------------------------------------
   6  *----------------------------------------------------------------------------
   7  *
   8  * MCA card detection code by Trent McNair. (now deleted)
   9  * Fixes to not explicitly nul bss data from Xavier Bestel.
  10  * Some multiboard fixes from Rolf Eike Beer.
  11  * Auto probing of EISA config space from Trevor Hemsley.
  12  *
  13  * Rewritten to use 53c700.c by James.Bottomley@SteelEye.com
  14  */
  15
  16 #include <linux/module.h>
  17 #include <linux/slab.h>
  18
  19 #include <linux/blkdev.h>
  20 #include <linux/device.h>
  21 #include <linux/init.h>
  22 #include <linux/eisa.h>
  23 #include <linux/interrupt.h>
  24 #include <scsi/scsi_host.h>
  25 #include <scsi/scsi_device.h>
  26 #include <scsi/scsi_transport.h>
  27 #include <scsi/scsi_transport_spi.h>
  28
  29 #include "53c700.h"
  30
  31
  32 /* Must be enough for EISA */
  33 #define MAX_SLOTS 8
  34 static __u8 __initdata id_array[MAX_SLOTS] = { [0 ... MAX_SLOTS-1] = 7 };
  35
  36 static char *sim710;            /* command line passed by insmod */
  37
  38 MODULE_AUTHOR("Richard Hirst");
  39 MODULE_DESCRIPTION("Simple NCR53C710 driver");
  40 MODULE_LICENSE("GPL");
  41
  42 module_param(sim710, charp, 0);
  43
  44 #ifdef MODULE
  45 #define ARG_SEP ' '
  46 #else
  47 #define ARG_SEP ','
  48 #endif
  49
  50 static __init int
  51 param_setup(char *str)
  52 {
  53         char *pos = str, *next;
  54         int slot = -1;
  55
  56         while(pos != NULL && (next = strchr(pos, ':')) != NULL) {
  57                 int val = (int)simple_strtoul(++next, NULL, 0);
  58
  59                 if(!strncmp(pos, "slot:", 5))
  60                         slot = val;
  61                 else if(!strncmp(pos, "id:", 3)) {
  62                         if(slot == -1) {
  63                                 printk(KERN_WARNING "sim710: Must specify slot for id parameter\n");
  64                         } else if(slot >= MAX_SLOTS) {
  65                                 printk(KERN_WARNING "sim710: Illegal slot %d for id %d\n", slot, val);
  66                         } else {
  67                                 id_array[slot] = val;
  68                         }
  69                 }
  70                 if((pos = strchr(pos, ARG_SEP)) != NULL)
  71                         pos++;
  72         }
  73         return 1;
  74 }
  75 __setup("sim710=", param_setup);
  76
  77 static struct scsi_host_template sim710_driver_template = {
  78         .name                   = "LSI (Symbios) 710 EISA",
  79         .proc_name              = "sim710",
  80         .this_id                = 7,
  81         .module                 = THIS_MODULE,
  82 };
  83
  84 static int sim710_probe_common(struct device *dev, unsigned long base_addr,
  85                                int irq, int clock, int differential,
  86                                int scsi_id)
  87 {
  88         struct Scsi_Host * host = NULL;
  89         struct NCR_700_Host_Parameters *hostdata =
  90                 kzalloc(sizeof(struct NCR_700_Host_Parameters), GFP_KERNEL);
  91
  92         printk(KERN_NOTICE "sim710: %s\n", dev_name(dev));
  93         printk(KERN_NOTICE "sim710: irq = %d, clock = %d, base = 0x%lx, scsi_id = %d\n",
  94                irq, clock, base_addr, scsi_id);
  95
  96         if(hostdata == NULL) {
  97                 printk(KERN_ERR "sim710: Failed to allocate host data\n");
  98                 goto out;
  99         }
 100
 101         if(request_region(base_addr, 64, "sim710") == NULL) {
 102                 printk(KERN_ERR "sim710: Failed to reserve IO region 0x%lx\n",
 103                        base_addr);
 104                 goto out_free;
 105         }
 106
 107         /* Fill in the three required pieces of hostdata */
 108         hostdata->base = ioport_map(base_addr, 64);
 109         hostdata->differential = differential;
 110         hostdata->clock = clock;
 111         hostdata->chip710 = 1;
 112         hostdata->burst_length = 8;
 113
 114         /* and register the chip */
 115         if((host = NCR_700_detect(&sim710_driver_template, hostdata, dev))
 116            == NULL) {
 117                 printk(KERN_ERR "sim710: No host detected; card configuration problem?\n");
 118                 goto out_release;
 119         }
 120         host->this_id = scsi_id;
 121         host->base = base_addr;
 122         host->irq = irq;
 123         if (request_irq(irq, NCR_700_intr, IRQF_SHARED, "sim710", host)) {
 124                 printk(KERN_ERR "sim710: request_irq failed\n");
 125                 goto out_put_host;
 126         }
 127
 128         dev_set_drvdata(dev, host);
 129         scsi_scan_host(host);
 130
 131         return 0;
 132
 133  out_put_host:
 134         scsi_host_put(host);
 135  out_release:
 136         release_region(base_addr, 64);
 137  out_free:
 138         kfree(hostdata);
 139  out:
 140         return -ENODEV;
 141 }
 142
 143 static int sim710_device_remove(struct device *dev)
 144 {
 145         struct Scsi_Host *host = dev_get_drvdata(dev);
 146         struct NCR_700_Host_Parameters *hostdata =
 147                 (struct NCR_700_Host_Parameters *)host->hostdata[0];
 148
 149         scsi_remove_host(host);
 150         NCR_700_release(host);
 151         kfree(hostdata);
 152         free_irq(host->irq, host);
 153         release_region(host->base, 64);
 154         return 0;
 155 }
 156
 157 #ifdef CONFIG_EISA
 158 static struct eisa_device_id sim710_eisa_ids[] = {
 159         { "CPQ4410" },
 160         { "CPQ4411" },
 161         { "HWP0C80" },
 162         { "" }
 163 };
 164 MODULE_DEVICE_TABLE(eisa, sim710_eisa_ids);
 165
 166 static int sim710_eisa_probe(struct device *dev)
 167 {
 168         struct eisa_device *edev = to_eisa_device(dev);
 169         unsigned long io_addr = edev->base_addr;
 170         char eisa_cpq_irqs[] = { 11, 14, 15, 10, 9, 0 };
 171         char eisa_hwp_irqs[] = { 3, 4, 5, 7, 12, 10, 11, 0};
 172         char *eisa_irqs;
 173         unsigned char irq_index;
 174         unsigned char irq, differential = 0, scsi_id = 7;
 175
 176         if(strcmp(edev->id.sig, "HWP0C80") == 0) {
 177                 __u8 val;
 178                 eisa_irqs =  eisa_hwp_irqs;
 179                 irq_index = (inb(io_addr + 0xc85) & 0x7) - 1;
 180
 181                 val = inb(io_addr + 0x4);
 182                 scsi_id = ffs(val) - 1;
 183
 184                 if(scsi_id > 7 || (val & ~(1<<scsi_id)) != 0) {
 185                         printk(KERN_ERR "sim710.c, EISA card %s has incorrect scsi_id, setting to 7\n", dev_name(dev));
 186                         scsi_id = 7;
 187                 }
 188         } else {
 189                 eisa_irqs = eisa_cpq_irqs;
 190                 irq_index = inb(io_addr + 0xc88) & 0x07;
 191         }
 192
 193         if(irq_index >= strlen(eisa_irqs)) {
 194                 printk("sim710.c: irq nasty\n");
 195                 return -ENODEV;
 196         }
 197
 198         irq = eisa_irqs[irq_index];
 199
 200         return sim710_probe_common(dev, io_addr, irq, 50,
 201                                    differential, scsi_id);
 202 }
 203
 204 static struct eisa_driver sim710_eisa_driver = {
 205         .id_table               = sim710_eisa_ids,
 206         .driver = {
 207                 .name           = "sim710",
 208                 .probe          = sim710_eisa_probe,
 209                 .remove         = sim710_device_remove,
 210         },
 211 };
 212 #endif /* CONFIG_EISA */
 213
 214 static int __init sim710_init(void)
 215 {
 216         int err = -ENODEV;
 217
 218 #ifdef MODULE
 219         if (sim710)
 220                 param_setup(sim710);
 221 #endif
 222
 223 #ifdef CONFIG_EISA
 224         err = eisa_driver_register(&sim710_eisa_driver);
 225 #endif
 226         /* FIXME: what we'd really like to return here is -ENODEV if
 227          * no devices have actually been found.  Instead, the err
 228          * above actually only reports problems with kobject_register,
 229          * so for the moment return success */
 230
 231         return 0;
 232 }
 233
 234 static void __exit sim710_exit(void)
 235 {
 236 #ifdef CONFIG_EISA
 237         eisa_driver_unregister(&sim710_eisa_driver);
 238 #endif
 239 }
 240
 241 module_init(sim710_init);
 242 module_exit(sim710_exit);