drivers/scsi/sim710.c

   1 /*
   2  * sim710.c - Copyright (C) 1999 Richard Hirst <richard@sleepie.demon.co.uk>
   3  *
   4  *----------------------------------------------------------------------------
   5  *  This program is free software; you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation; either version 2 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18  *----------------------------------------------------------------------------
  19  *
  20  * MCA card detection code by Trent McNair. (now deleted)
  21  * Fixes to not explicitly nul bss data from Xavier Bestel.
  22  * Some multiboard fixes from Rolf Eike Beer.
  23  * Auto probing of EISA config space from Trevor Hemsley.
  24  *
  25  * Rewritten to use 53c700.c by James.Bottomley@SteelEye.com
  26  *
  27  */
  28
  29 #include <linux/module.h>
  30 #include <linux/slab.h>
  31
  32 #include <linux/blkdev.h>
  33 #include <linux/device.h>
  34 #include <linux/init.h>
  35 #include <linux/eisa.h>
  36 #include <linux/interrupt.h>
  37 #include <scsi/scsi_host.h>
  38 #include <scsi/scsi_device.h>
  39 #include <scsi/scsi_transport.h>
  40 #include <scsi/scsi_transport_spi.h>
  41
  42 #include "53c700.h"
  43
  44
  45 /* Must be enough for EISA */
  46 #define MAX_SLOTS 8
  47 static __u8 __initdata id_array[MAX_SLOTS] = { [0 ... MAX_SLOTS-1] = 7 };
  48
  49 static char *sim710;            /* command line passed by insmod */
  50
  51 MODULE_AUTHOR("Richard Hirst");
  52 MODULE_DESCRIPTION("Simple NCR53C710 driver");
  53 MODULE_LICENSE("GPL");
  54
  55 module_param(sim710, charp, 0);
  56
  57 #ifdef MODULE
  58 #define ARG_SEP ' '
  59 #else
  60 #define ARG_SEP ','
  61 #endif
  62
  63 static __init int
  64 param_setup(char *str)
  65 {
  66         char *pos = str, *next;
  67         int slot = -1;
  68
  69         while(pos != NULL && (next = strchr(pos, ':')) != NULL) {
  70                 int val = (int)simple_strtoul(++next, NULL, 0);
  71
  72                 if(!strncmp(pos, "slot:", 5))
  73                         slot = val;
  74                 else if(!strncmp(pos, "id:", 3)) {
  75                         if(slot == -1) {
  76                                 printk(KERN_WARNING "sim710: Must specify slot for id parameter\n");
  77                         } else if(slot >= MAX_SLOTS) {
  78                                 printk(KERN_WARNING "sim710: Illegal slot %d for id %d\n", slot, val);
  79                         } else {
  80                                 id_array[slot] = val;
  81                         }
  82                 }
  83                 if((pos = strchr(pos, ARG_SEP)) != NULL)
  84                         pos++;
  85         }
  86         return 1;
  87 }
  88 __setup("sim710=", param_setup);
  89
  90 static struct scsi_host_template sim710_driver_template = {
  91         .name                   = "LSI (Symbios) 710 EISA",
  92         .proc_name              = "sim710",
  93         .this_id                = 7,
  94         .module                 = THIS_MODULE,
  95 };
  96
  97 static int sim710_probe_common(struct device *dev, unsigned long base_addr,
  98                                int irq, int clock, int differential,
  99                                int scsi_id)
 100 {
 101         struct Scsi_Host * host = NULL;
 102         struct NCR_700_Host_Parameters *hostdata =
 103                 kzalloc(sizeof(struct NCR_700_Host_Parameters), GFP_KERNEL);
 104
 105         printk(KERN_NOTICE "sim710: %s\n", dev_name(dev));
 106         printk(KERN_NOTICE "sim710: irq = %d, clock = %d, base = 0x%lx, scsi_id = %d\n",
 107                irq, clock, base_addr, scsi_id);
 108
 109         if(hostdata == NULL) {
 110                 printk(KERN_ERR "sim710: Failed to allocate host data\n");
 111                 goto out;
 112         }
 113
 114         if(request_region(base_addr, 64, "sim710") == NULL) {
 115                 printk(KERN_ERR "sim710: Failed to reserve IO region 0x%lx\n",
 116                        base_addr);
 117                 goto out_free;
 118         }
 119
 120         /* Fill in the three required pieces of hostdata */
 121         hostdata->base = ioport_map(base_addr, 64);
 122         hostdata->differential = differential;
 123         hostdata->clock = clock;
 124         hostdata->chip710 = 1;
 125         hostdata->burst_length = 8;
 126
 127         /* and register the chip */
 128         if((host = NCR_700_detect(&sim710_driver_template, hostdata, dev))
 129            == NULL) {
 130                 printk(KERN_ERR "sim710: No host detected; card configuration problem?\n");
 131                 goto out_release;
 132         }
 133         host->this_id = scsi_id;
 134         host->base = base_addr;
 135         host->irq = irq;
 136         if (request_irq(irq, NCR_700_intr, IRQF_SHARED, "sim710", host)) {
 137                 printk(KERN_ERR "sim710: request_irq failed\n");
 138                 goto out_put_host;
 139         }
 140
 141         dev_set_drvdata(dev, host);
 142         scsi_scan_host(host);
 143
 144         return 0;
 145
 146  out_put_host:
 147         scsi_host_put(host);
 148  out_release:
 149         release_region(base_addr, 64);
 150  out_free:
 151         kfree(hostdata);
 152  out:
 153         return -ENODEV;
 154 }
 155
 156 static int sim710_device_remove(struct device *dev)
 157 {
 158         struct Scsi_Host *host = dev_get_drvdata(dev);
 159         struct NCR_700_Host_Parameters *hostdata =
 160                 (struct NCR_700_Host_Parameters *)host->hostdata[0];
 161
 162         scsi_remove_host(host);
 163         NCR_700_release(host);
 164         kfree(hostdata);
 165         free_irq(host->irq, host);
 166         release_region(host->base, 64);
 167         return 0;
 168 }
 169
 170 #ifdef CONFIG_EISA
 171 static struct eisa_device_id sim710_eisa_ids[] = {
 172         { "CPQ4410" },
 173         { "CPQ4411" },
 174         { "HWP0C80" },
 175         { "" }
 176 };
 177 MODULE_DEVICE_TABLE(eisa, sim710_eisa_ids);
 178
 179 static int sim710_eisa_probe(struct device *dev)
 180 {
 181         struct eisa_device *edev = to_eisa_device(dev);
 182         unsigned long io_addr = edev->base_addr;
 183         char eisa_cpq_irqs[] = { 11, 14, 15, 10, 9, 0 };
 184         char eisa_hwp_irqs[] = { 3, 4, 5, 7, 12, 10, 11, 0};
 185         char *eisa_irqs;
 186         unsigned char irq_index;
 187         unsigned char irq, differential = 0, scsi_id = 7;
 188
 189         if(strcmp(edev->id.sig, "HWP0C80") == 0) {
 190                 __u8 val;
 191                 eisa_irqs =  eisa_hwp_irqs;
 192                 irq_index = (inb(io_addr + 0xc85) & 0x7) - 1;
 193
 194                 val = inb(io_addr + 0x4);
 195                 scsi_id = ffs(val) - 1;
 196
 197                 if(scsi_id > 7 || (val & ~(1<<scsi_id)) != 0) {
 198                         printk(KERN_ERR "sim710.c, EISA card %s has incorrect scsi_id, setting to 7\n", dev_name(dev));
 199                         scsi_id = 7;
 200                 }
 201         } else {
 202                 eisa_irqs = eisa_cpq_irqs;
 203                 irq_index = inb(io_addr + 0xc88) & 0x07;
 204         }
 205
 206         if(irq_index >= strlen(eisa_irqs)) {
 207                 printk("sim710.c: irq nasty\n");
 208                 return -ENODEV;
 209         }
 210
 211         irq = eisa_irqs[irq_index];
 212
 213         return sim710_probe_common(dev, io_addr, irq, 50,
 214                                    differential, scsi_id);
 215 }
 216
 217 static struct eisa_driver sim710_eisa_driver = {
 218         .id_table               = sim710_eisa_ids,
 219         .driver = {
 220                 .name           = "sim710",
 221                 .probe          = sim710_eisa_probe,
 222                 .remove         = sim710_device_remove,
 223         },
 224 };
 225 #endif /* CONFIG_EISA */
 226
 227 static int __init sim710_init(void)
 228 {
 229         int err = -ENODEV;
 230
 231 #ifdef MODULE
 232         if (sim710)
 233                 param_setup(sim710);
 234 #endif
 235
 236 #ifdef CONFIG_EISA
 237         err = eisa_driver_register(&sim710_eisa_driver);
 238 #endif
 239         /* FIXME: what we'd really like to return here is -ENODEV if
 240          * no devices have actually been found.  Instead, the err
 241          * above actually only reports problems with kobject_register,
 242          * so for the moment return success */
 243
 244         return 0;
 245 }
 246
 247 static void __exit sim710_exit(void)
 248 {
 249 #ifdef CONFIG_EISA
 250         eisa_driver_unregister(&sim710_eisa_driver);
 251 #endif
 252 }
 253
 254 module_init(sim710_init);
 255 module_exit(sim710_exit);