drivers/scsi/fdomain_isa.c

   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
  10 static int io[MAXBOARDS_PARAM] = { 0, 0, 0, 0 };
  11 module_param_hw_array(io, int, ioport, NULL, 0);
  12 MODULE_PARM_DESC(io, "base I/O address of controller (0x140, 0x150, 0x160, 0x170)");
  13
  14 static int irq[MAXBOARDS_PARAM] = { 0, 0, 0, 0 };
  15 module_param_hw_array(irq, int, irq, NULL, 0);
  16 MODULE_PARM_DESC(irq, "IRQ of controller (0=auto [default])");
  17
  18 static int scsi_id[MAXBOARDS_PARAM] = { 0, 0, 0, 0 };
  19 module_param_hw_array(scsi_id, int, other, NULL, 0);
  20 MODULE_PARM_DESC(scsi_id, "SCSI ID of controller (default = 7)");
  21
  22 static unsigned long addresses[] = {
  23         0xc8000,
  24         0xca000,
  25         0xce000,
  26         0xde000,
  27 };
  28 #define ADDRESS_COUNT ARRAY_SIZE(addresses)
  29
  30 static unsigned short ports[] = { 0x140, 0x150, 0x160, 0x170 };
  31 #define PORT_COUNT ARRAY_SIZE(ports)
  32
  33 static 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
  59 static 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
  86 static 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;
 146 fail_unmap:
 147         iounmap(p);
 148         return 0;
 149 }
 150
 151 static 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
 178 static 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
 188 static 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
 197 static 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
 209 static void __exit fdomain_isa_exit(void)
 210 {
 211         isa_unregister_driver(&fdomain_isa_driver);
 212 }
 213
 214 module_init(fdomain_isa_init);
 215 module_exit(fdomain_isa_exit);
 216
 217 MODULE_AUTHOR("Ondrej Zary, Rickard E. Faith");
 218 MODULE_DESCRIPTION("Future Domain TMC-16x0 ISA SCSI driver");
 219 MODULE_LICENSE("GPL");