LXR linux/drivers/scsi/fdomain

   1// SPDX-License-Identifier: GPL-2.0
   2
   3#include <linux/module.h>
   4#include <linux/io.h>
   5#include <linux/isa.h>
   6#include <scsi/scsi_host.h>
   7#include "fdomain.h"
   8
   9#define MAXBOARDS_PARAM 4
  10static int io[MAXBOARDS_PARAM] = { 0, 0, 0, 0 };
  11module_param_hw_array(io, int, ioport, NULL, 0);
  12MODULE_PARM_DESC(io, "base I/O address of controller (0x140, 0x150, 0x160, 0x170)");
  13
  14static int irq[MAXBOARDS_PARAM] = { 0, 0, 0, 0 };
  15module_param_hw_array(irq, int, irq, NULL, 0);
  16MODULE_PARM_DESC(irq, "IRQ of controller (0=auto [default])");
  17
  18static int scsi_id[MAXBOARDS_PARAM] = { 0, 0, 0, 0 };
  19module_param_hw_array(scsi_id, int, other, NULL, 0);
  20MODULE_PARM_DESC(scsi_id, "SCSI ID of controller (default = 7)");
  21
  22static unsigned long addresses[] = {
  23        0xc8000,
  24        0xca000,
  25        0xce000,
  26        0xde000,
  27};
  28#define ADDRESS_COUNT ARRAY_SIZE(addresses)
  29
  30static unsigned short ports[] = { 0x140, 0x150, 0x160, 0x170 };
  31#define PORT_COUNT ARRAY_SIZE(ports)
  32
  33static unsigned short irqs[] = { 3, 5, 10, 11, 12, 14, 15, 0 };
  34
  35/* This driver works *ONLY* for Future Domain cards using the TMC-1800,
  36 * TMC-18C50, or TMC-18C30 chip.  This includes models TMC-1650, 1660, 1670,
  37 * and 1680. These are all 16-bit cards.
  38 * BIOS versions prior to 3.2 assigned SCSI ID 6 to SCSI adapter.
  39 *
  40 * The following BIOS signature signatures are for boards which do *NOT*
  41 * work with this driver (these TMC-8xx and TMC-9xx boards may work with the
  42 * Seagate driver):
  43 *
  44 * FUTURE DOMAIN CORP. (C) 1986-1988 V4.0I 03/16/88
  45 * FUTURE DOMAIN CORP. (C) 1986-1989 V5.0C2/14/89
  46 * FUTURE DOMAIN CORP. (C) 1986-1989 V6.0A7/28/89
  47 * FUTURE DOMAIN CORP. (C) 1986-1990 V6.0105/31/90
  48 * FUTURE DOMAIN CORP. (C) 1986-1990 V6.0209/18/90
  49 * FUTURE DOMAIN CORP. (C) 1986-1990 V7.009/18/90
  50 * FUTURE DOMAIN CORP. (C) 1992 V8.00.004/02/92
  51 *
  52 * (The cards which do *NOT* work are all 8-bit cards -- although some of
  53 * them have a 16-bit form-factor, the upper 8-bits are used only for IRQs
  54 * and are *NOT* used for data. You can tell the difference by following
  55 * the tracings on the circuit board -- if only the IRQ lines are involved,
  56 * you have a "8-bit" card, and should *NOT* use this driver.)
  57 */
  58
  59static struct signature {
  60        const char *signature;
  61        int offset;
  62        int length;
  63        int this_id;
  64        int base_offset;
  65} signatures[] = {
  66/*          1         2         3         4         5         6 */
  67/* 123456789012345678901234567890123456789012345678901234567890 */
  68{ "FUTURE DOMAIN CORP. (C) 1986-1990 1800-V2.07/28/89",  5, 50,  6, 0x1fcc },
  69{ "FUTURE DOMAIN CORP. (C) 1986-1990 1800-V1.07/28/89",  5, 50,  6, 0x1fcc },
  70{ "FUTURE DOMAIN CORP. (C) 1986-1990 1800-V2.07/28/89", 72, 50,  6, 0x1fa2 },
  71{ "FUTURE DOMAIN CORP. (C) 1986-1990 1800-V2.0",        73, 43,  6, 0x1fa2 },
  72{ "FUTURE DOMAIN CORP. (C) 1991 1800-V2.0.",            72, 39,  6, 0x1fa3 },
  73{ "FUTURE DOMAIN CORP. (C) 1992 V3.00.004/02/92",        5, 44,  6, 0 },
  74{ "FUTURE DOMAIN TMC-18XX (C) 1993 V3.203/12/93",        5, 44,  7, 0 },
  75{ "IBM F1 P2 BIOS v1.0011/09/92",                        5, 28,  7, 0x1ff3 },
  76{ "IBM F1 P2 BIOS v1.0104/29/93",                        5, 28,  7, 0 },
  77{ "Future Domain Corp. V1.0008/18/93",                   5, 33,  7, 0 },
  78{ "Future Domain Corp. V2.0108/18/93",                   5, 33,  7, 0 },
  79{ "FUTURE DOMAIN CORP.  V3.5008/18/93",                  5, 34,  7, 0 },
  80{ "FUTURE DOMAIN 18c30/18c50/1800 (C) 1994 V3.5",        5, 44,  7, 0 },
  81{ "FUTURE DOMAIN CORP.  V3.6008/18/93",                  5, 34,  7, 0 },
  82{ "FUTURE DOMAIN CORP.  V3.6108/18/93",                  5, 34,  7, 0 },
  83};
  84#define SIGNATURE_COUNT ARRAY_SIZE(signatures)
  85
  86static int fdomain_isa_match(struct device *dev, unsigned int ndev)
  87{
  88        struct Scsi_Host *sh;
  89        int i, base = 0, irq = 0;
  90        unsigned long bios_base = 0;
  91        struct signature *sig = NULL;
  92        void __iomem *p;
  93        static struct signature *saved_sig;
  94        int this_id = 7;
  95
  96        if (ndev < ADDRESS_COUNT) {     /* scan supported ISA BIOS addresses */
  97                p = ioremap(addresses[ndev], FDOMAIN_BIOS_SIZE);
  98                if (!p)
  99                        return 0;
 100                for (i = 0; i < SIGNATURE_COUNT; i++)
 101                        if (check_signature(p + signatures[i].offset,
 102                                            signatures[i].signature,
 103                                            signatures[i].length))
 104                                break;
 105                if (i == SIGNATURE_COUNT)       /* no signature found */
 106                        goto fail_unmap;
 107                sig = &signatures[i];
 108                bios_base = addresses[ndev];
 109                /* read I/O base from BIOS area */
 110                if (sig->base_offset)
 111                        base = readb(p + sig->base_offset) +
 112                              (readb(p + sig->base_offset + 1) << 8);
 113                iounmap(p);
 114                if (base) {
 115                        dev_info(dev, "BIOS at 0x%lx specifies I/O base 0x%x\n",
 116                                 bios_base, base);
 117                } else { /* no I/O base in BIOS area */
 118                        dev_info(dev, "BIOS at 0x%lx\n", bios_base);
 119                        /* save BIOS signature for later use in port probing */
 120                        saved_sig = sig;
 121                        return 0;
 122                }
 123        } else  /* scan supported I/O ports */
 124                base = ports[ndev - ADDRESS_COUNT];
 125
 126        /* use saved BIOS signature if present */
 127        if (!sig && saved_sig)
 128                sig = saved_sig;
 129
 130        if (!request_region(base, FDOMAIN_REGION_SIZE, "fdomain_isa"))
 131                return 0;
 132
 133        irq = irqs[(inb(base + REG_CFG1) & CFG1_IRQ_MASK) >> 1];
 134
 135        if (sig)
 136                this_id = sig->this_id;
 137
 138        sh = fdomain_create(base, irq, this_id, dev);
 139        if (!sh) {
 140                release_region(base, FDOMAIN_REGION_SIZE);
 141                return 0;
 142        }
 143
 144        dev_set_drvdata(dev, sh);
 145        return 1;
 146fail_unmap:
 147        iounmap(p);
 148        return 0;
 149}
 150
 151static int fdomain_isa_param_match(struct device *dev, unsigned int ndev)
 152{
 153        struct Scsi_Host *sh;
 154        int irq_ = irq[ndev];
 155
 156        if (!io[ndev])
 157                return 0;
 158
 159        if (!request_region(io[ndev], FDOMAIN_REGION_SIZE, "fdomain_isa")) {
 160                dev_err(dev, "base 0x%x already in use", io[ndev]);
 161                return 0;
 162        }
 163
 164        if (irq_ <= 0)
 165                irq_ = irqs[(inb(io[ndev] + REG_CFG1) & CFG1_IRQ_MASK) >> 1];
 166
 167        sh = fdomain_create(io[ndev], irq_, scsi_id[ndev], dev);
 168        if (!sh) {
 169                dev_err(dev, "controller not found at base 0x%x", io[ndev]);
 170                release_region(io[ndev], FDOMAIN_REGION_SIZE);
 171                return 0;
 172        }
 173
 174        dev_set_drvdata(dev, sh);
 175        return 1;
 176}
 177
 178static void fdomain_isa_remove(struct device *dev, unsigned int ndev)
 179{
 180        struct Scsi_Host *sh = dev_get_drvdata(dev);
 181        int base = sh->io_port;
 182
 183        fdomain_destroy(sh);
 184        release_region(base, FDOMAIN_REGION_SIZE);
 185        dev_set_drvdata(dev, NULL);
 186}
 187
 188static struct isa_driver fdomain_isa_driver = {
 189        .match          = fdomain_isa_match,
 190        .remove         = fdomain_isa_remove,
 191        .driver = {
 192                .name   = "fdomain_isa",
 193                .pm     = FDOMAIN_PM_OPS,
 194        },
 195};
 196
 197static int __init fdomain_isa_init(void)
 198{
 199        int isa_probe_count = ADDRESS_COUNT + PORT_COUNT;
 200
 201        if (io[0]) {    /* use module parameters if present */
 202                fdomain_isa_driver.match = fdomain_isa_param_match;
 203                isa_probe_count = MAXBOARDS_PARAM;
 204        }
 205
 206        return isa_register_driver(&fdomain_isa_driver, isa_probe_count);
 207}
 208
 209static void __exit fdomain_isa_exit(void)
 210{
 211        isa_unregister_driver(&fdomain_isa_driver);
 212}
 213
 214module_init(fdomain_isa_init);
 215module_exit(fdomain_isa_exit);
 216
 217MODULE_AUTHOR("Ondrej Zary, Rickard E. Faith");
 218MODULE_DESCRIPTION("Future Domain TMC-16x0 ISA SCSI driver");
 219MODULE_LICENSE("GPL");
 220