// SPDX-License-Identifier: GPL-2.0
#include <linux/module.h>
#include <linux/io.h>
#include <linux/isa.h>
#include <scsi/scsi_host.h>
#include "fdomain.h"
#define MAXBOARDS_PARAM 4
static int io[MAXBOARDS_PARAM] = { 0, 0, 0, 0 };
module_param_hw_array(io, int, ioport, NULL, 0);
MODULE_PARM_DESC(io, "base I/O address of controller (0x140, 0x150, 0x160, 0x170)");
static int irq[MAXBOARDS_PARAM] = { 0, 0, 0, 0 };
module_param_hw_array(irq, int, irq, NULL, 0);
MODULE_PARM_DESC(irq, "IRQ of controller (0=auto [default])");
static int scsi_id[MAXBOARDS_PARAM] = { 0, 0, 0, 0 };
module_param_hw_array(scsi_id, int, other, NULL, 0);
MODULE_PARM_DESC(scsi_id, "SCSI ID of controller (default = 7)");
static unsigned long addresses[] = {
0xc8000,
0xca000,
0xce000,
0xde000,
};
#define ADDRESS_COUNT ARRAY_SIZE(addresses)
static unsigned short ports[] = { 0x140, 0x150, 0x160, 0x170 };
#define PORT_COUNT ARRAY_SIZE(ports)
static unsigned short irqs[] = { 3, 5, 10, 11, 12, 14, 15, 0 };
/* This driver works *ONLY* for Future Domain cards using the TMC-1800,
* TMC-18C50, or TMC-18C30 chip. This includes models TMC-1650, 1660, 1670,
* and 1680. These are all 16-bit cards.
* BIOS versions prior to 3.2 assigned SCSI ID 6 to SCSI adapter.
*
* The following BIOS signature signatures are for boards which do *NOT*
* work with this driver (these TMC-8xx and TMC-9xx boards may work with the
* Seagate driver):
*
* FUTURE DOMAIN CORP. (C) 1986-1988 V4.0I 03/16/88
* FUTURE DOMAIN CORP. (C) 1986-1989 V5.0C2/14/89
* FUTURE DOMAIN CORP. (C) 1986-1989 V6.0A7/28/89
* FUTURE DOMAIN CORP. (C) 1986-1990 V6.0105/31/90
* FUTURE DOMAIN CORP. (C) 1986-1990 V6.0209/18/90
* FUTURE DOMAIN CORP. (C) 1986-1990 V7.009/18/90
* FUTURE DOMAIN CORP. (C) 1992 V8.00.004/02/92
*
* (The cards which do *NOT* work are all 8-bit cards -- although some of
* them have a 16-bit form-factor, the upper 8-bits are used only for IRQs
* and are *NOT* used for data. You can tell the difference by following
* the tracings on the circuit board -- if only the IRQ lines are involved,
* you have a "8-bit" card, and should *NOT* use this driver.)
*/
static struct signature {
const char *signature;
int offset;
int length;
int this_id;
int base_offset;
} signatures[] = {
/* 1 2 3 4 5 6 */
/* 123456789012345678901234567890123456789012345678901234567890 */
{ "FUTURE DOMAIN CORP. (C) 1986-1990 1800-V2.07/28/89", 5, 50, 6, 0x1fcc },
{ "FUTURE DOMAIN CORP. (C) 1986-1990 1800-V1.07/28/89", 5, 50, 6, 0x1fcc },
{ "FUTURE DOMAIN CORP. (C) 1986-1990 1800-V2.07/28/89", 72, 50, 6, 0x1fa2 },
{ "FUTURE DOMAIN CORP. (C) 1986-1990 1800-V2.0", 73, 43, 6, 0x1fa2 },
{ "FUTURE DOMAIN CORP. (C) 1991 1800-V2.0.", 72, 39, 6, 0x1fa3 },
{ "FUTURE DOMAIN CORP. (C) 1992 V3.00.004/02/92", 5, 44, 6, 0 },
{ "FUTURE DOMAIN TMC-18XX (C) 1993 V3.203/12/93", 5, 44, 7, 0 },
{ "IBM F1 P2 BIOS v1.0011/09/92", 5, 28, 7, 0x1ff3 },
{ "IBM F1 P2 BIOS v1.0104/29/93", 5, 28, 7, 0 },
{ "Future Domain Corp. V1.0008/18/93", 5, 33, 7, 0 },
{ "Future Domain Corp. V2.0108/18/93", 5, 33, 7, 0 },
{ "FUTURE DOMAIN CORP. V3.5008/18/93", 5, 34, 7, 0 },
{ "FUTURE DOMAIN 18c30/18c50/1800 (C) 1994 V3.5", 5, 44, 7, 0 },
{ "FUTURE DOMAIN CORP. V3.6008/18/93", 5, 34, 7, 0 },
{ "FUTURE DOMAIN CORP. V3.6108/18/93", 5, 34, 7, 0 },
};
#define SIGNATURE_COUNT ARRAY_SIZE(signatures)
static int fdomain_isa_match(struct device *dev, unsigned int ndev)
{
struct Scsi_Host *sh;
int i, base = 0, irq = 0;
unsigned long bios_base = 0;
struct signature *sig = NULL;
void __iomem *p;
static struct signature *saved_sig;
int this_id = 7;
if (ndev < ADDRESS_COUNT) { /* scan supported ISA BIOS addresses */
p = ioremap(addresses[ndev], FDOMAIN_BIOS_SIZE);
if (!p)
return 0;
for (i = 0; i < SIGNATURE_COUNT; i++)
if (check_signature(p + signatures[i].offset,
signatures[i].signature,
signatures[i].length))
break;
if (i == SIGNATURE_COUNT) /* no signature found */
goto fail_unmap;
sig = &signatures[i];
bios_base = addresses[ndev];
/* read I/O base from BIOS area */
if (sig->base_offset)
base = readb(p + sig->base_offset) +
(readb(p + sig->base_offset + 1) << 8);
iounmap(p);
if (base) {
dev_info(dev, "BIOS at 0x%lx specifies I/O base 0x%x\n",
bios_base, base);
} else { /* no I/O base in BIOS area */
dev_info(dev, "BIOS at 0x%lx\n", bios_base);
/* save BIOS signature for later use in port probing */
saved_sig = sig;
return 0;
}
} else /* scan supported I/O ports */
base = ports[ndev - ADDRESS_COUNT];
/* use saved BIOS signature if present */
if (!sig && saved_sig)
sig = saved_sig;
if (!request_region(base, FDOMAIN_REGION_SIZE, "fdomain_isa"))
return 0;
irq = irqs[(inb(base + REG_CFG1) & CFG1_IRQ_MASK) >> 1];
if (sig)
this_id = sig->this_id;
sh = fdomain_create(base, irq, this_id, dev);
if (!sh) {
release_region(base, FDOMAIN_REGION_SIZE);
return 0;
}
dev_set_drvdata(dev, sh);
return 1;
fail_unmap:
iounmap(p);
return 0;
}
static int fdomain_isa_param_match(struct device *dev, unsigned int ndev)
{
struct Scsi_Host *sh;
int irq_ = irq[ndev];
if (!io[ndev])
return 0;
if (!request_region(io[ndev], FDOMAIN_REGION_SIZE, "fdomain_isa")) {
dev_err(dev, "base 0x%x already in use", io[ndev]);
return 0;
}
if (irq_ <= 0)
irq_ = irqs[(inb(io[ndev] + REG_CFG1) & CFG1_IRQ_MASK) >> 1];
sh = fdomain_create(io[ndev], irq_, scsi_id[ndev], dev);
if (!sh) {
dev_err(dev, "controller not found at base 0x%x", io[ndev]);
release_region(io[ndev], FDOMAIN_REGION_SIZE);
return 0;
}
dev_set_drvdata(dev, sh);
return 1;
}
static void fdomain_isa_remove(struct device *dev, unsigned int ndev)
{
struct Scsi_Host *sh = dev_get_drvdata(dev);
int base = sh->io_port;
fdomain_destroy(sh);
release_region(base, FDOMAIN_REGION_SIZE);
dev_set_drvdata(dev, NULL);
}
static struct isa_driver fdomain_isa_driver = {
.match = fdomain_isa_match,
.remove = fdomain_isa_remove,
.driver = {
.name = "fdomain_isa",
.pm = FDOMAIN_PM_OPS,
},
};
static int __init fdomain_isa_init(void)
{
int isa_probe_count = ADDRESS_COUNT + PORT_COUNT;
if (io[0]) { /* use module parameters if present */
fdomain_isa_driver.match = fdomain_isa_param_match;
isa_probe_count = MAXBOARDS_PARAM;
}
return isa_register_driver(&fdomain_isa_driver, isa_probe_count);
}
static void __exit fdomain_isa_exit(void)
{
isa_unregister_driver(&fdomain_isa_driver);
}
module_init(fdomain_isa_init);
module_exit(fdomain_isa_exit);
MODULE_AUTHOR("Ondrej Zary, Rickard E. Faith");
MODULE_DESCRIPTION("Future Domain TMC-16x0 ISA SCSI driver");
MODULE_LICENSE("GPL");