linux/drivers/scsi/sim710.c
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   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
  47static __u8 __initdata id_array[MAX_SLOTS] = { [0 ... MAX_SLOTS-1] = 7 };
  48
  49static char *sim710;            /* command line passed by insmod */
  50
  51MODULE_AUTHOR("Richard Hirst");
  52MODULE_DESCRIPTION("Simple NCR53C710 driver");
  53MODULE_LICENSE("GPL");
  54
  55module_param(sim710, charp, 0);
  56
  57#ifdef MODULE
  58#define ARG_SEP ' '
  59#else
  60#define ARG_SEP ','
  61#endif
  62
  63static __init int
  64param_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
  90static 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
  97static 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
 156static 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
 171static struct eisa_device_id sim710_eisa_ids[] = {
 172        { "CPQ4410" },
 173        { "CPQ4411" },
 174        { "HWP0C80" },
 175        { "" }
 176};
 177MODULE_DEVICE_TABLE(eisa, sim710_eisa_ids);
 178
 179static __init int
 180sim710_eisa_probe(struct device *dev)
 181{
 182        struct eisa_device *edev = to_eisa_device(dev);
 183        unsigned long io_addr = edev->base_addr;
 184        char eisa_cpq_irqs[] = { 11, 14, 15, 10, 9, 0 };
 185        char eisa_hwp_irqs[] = { 3, 4, 5, 7, 12, 10, 11, 0};
 186        char *eisa_irqs;
 187        unsigned char irq_index;
 188        unsigned char irq, differential = 0, scsi_id = 7;
 189
 190        if(strcmp(edev->id.sig, "HWP0C80") == 0) {
 191                __u8 val;
 192                eisa_irqs =  eisa_hwp_irqs;
 193                irq_index = (inb(io_addr + 0xc85) & 0x7) - 1;
 194
 195                val = inb(io_addr + 0x4);
 196                scsi_id = ffs(val) - 1;
 197
 198                if(scsi_id > 7 || (val & ~(1<<scsi_id)) != 0) {
 199                        printk(KERN_ERR "sim710.c, EISA card %s has incorrect scsi_id, setting to 7\n", dev_name(dev));
 200                        scsi_id = 7;
 201                }
 202        } else {
 203                eisa_irqs = eisa_cpq_irqs;
 204                irq_index = inb(io_addr + 0xc88) & 0x07;
 205        }
 206
 207        if(irq_index >= strlen(eisa_irqs)) {
 208                printk("sim710.c: irq nasty\n");
 209                return -ENODEV;
 210        }
 211
 212        irq = eisa_irqs[irq_index];
 213                
 214        return sim710_probe_common(dev, io_addr, irq, 50,
 215                                   differential, scsi_id);
 216}
 217
 218static struct eisa_driver sim710_eisa_driver = {
 219        .id_table               = sim710_eisa_ids,
 220        .driver = {
 221                .name           = "sim710",
 222                .probe          = sim710_eisa_probe,
 223                .remove         = sim710_device_remove,
 224        },
 225};
 226#endif /* CONFIG_EISA */
 227
 228static int __init sim710_init(void)
 229{
 230        int err = -ENODEV;
 231
 232#ifdef MODULE
 233        if (sim710)
 234                param_setup(sim710);
 235#endif
 236
 237#ifdef CONFIG_EISA
 238        err = eisa_driver_register(&sim710_eisa_driver);
 239#endif
 240        /* FIXME: what we'd really like to return here is -ENODEV if
 241         * no devices have actually been found.  Instead, the err
 242         * above actually only reports problems with kobject_register,
 243         * so for the moment return success */
 244
 245        return 0;
 246}
 247
 248static void __exit sim710_exit(void)
 249{
 250#ifdef CONFIG_EISA
 251        eisa_driver_unregister(&sim710_eisa_driver);
 252#endif
 253}
 254
 255module_init(sim710_init);
 256module_exit(sim710_exit);
 257
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