[PATCH v2 3/3] fdomain: Resurrect driver (ISA support)

From: Ondrej Zary
Date: Tue May 14 2019 - 13:25:16 EST

Future Domain 16xx ISA SCSI support card support.

Tested on IBM 92F0330 card (18C50 chip) with v1.00 BIOS.

Signed-off-by: Ondrej Zary <linux@xxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
---
drivers/scsi/Kconfig | 14 +++
drivers/scsi/Makefile | 1 +
drivers/scsi/fdomain_isa.c | 222 +++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 237 insertions(+)
create mode 100644 drivers/scsi/fdomain_isa.c

diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig
index f9d058a07e2a..2ea77dafbc00 100644
--- a/drivers/scsi/Kconfig
+++ b/drivers/scsi/Kconfig
@@ -684,6 +684,20 @@ config SCSI_FDOMAIN_PCI
To compile this driver as a module, choose M here: the
module will be called fdomain_pci.

+config SCSI_FDOMAIN_ISA
+ tristate "Future Domain 16xx ISA SCSI support"
+ depends on ISA && SCSI
+ select CHECK_SIGNATURE
+ select SCSI_FDOMAIN
+ help
+ This is support for Future Domain's 16-bit SCSI host adapters
+ (TMC-1660/1680, TMC-1650/1670, TMC-1610M/MER/MEX) and other adapters
+ with ISA bus based on the Future Domain chipsets (Quantum ISA-200S,
+ ISA-250MG; and at least one IBM board).
+
+ To compile this driver as a module, choose M here: the
+ module will be called fdomain_isa.
+
config SCSI_GDTH
tristate "Intel/ICP (former GDT SCSI Disk Array) RAID Controller support"
depends on PCI && SCSI
diff --git a/drivers/scsi/Makefile b/drivers/scsi/Makefile
index f6cc4fbe6957..2e2cffff777d 100644
--- a/drivers/scsi/Makefile
+++ b/drivers/scsi/Makefile
@@ -78,6 +78,7 @@ obj-$(CONFIG_SCSI_ISCI) += isci/
obj-$(CONFIG_SCSI_IPS) += ips.o
obj-$(CONFIG_SCSI_FDOMAIN) += fdomain.o
obj-$(CONFIG_SCSI_FDOMAIN_PCI) += fdomain_pci.o
+obj-$(CONFIG_SCSI_FDOMAIN_ISA) += fdomain_isa.o
obj-$(CONFIG_SCSI_GENERIC_NCR5380) += g_NCR5380.o
obj-$(CONFIG_SCSI_QLOGIC_FAS) += qlogicfas408.o qlogicfas.o
obj-$(CONFIG_PCMCIA_QLOGIC) += qlogicfas408.o
diff --git a/drivers/scsi/fdomain_isa.c b/drivers/scsi/fdomain_isa.c
new file mode 100644
index 000000000000..bca5d56f12aa
--- /dev/null
+++ b/drivers/scsi/fdomain_isa.c
@@ -0,0 +1,222 @@
+// 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
+ dev_info(dev, "BIOS at 0x%lx\n", bios_base);
+ if (!base) { /* no I/O base in BIOS area */
+ /* 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 + Configuration1) & 0x0e) >> 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] + Configuration1) & 0x0e) >> 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 int 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);
+ return 0;
+}
+
+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");
--
Ondrej Zary