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255937d773
The *else* branch of the *if* (base) statement in fdomain_isa_match() is immediately followed by the *if* (!base) statement. Simplify the code by removing the unneeded *if*. Link: https://lore.kernel.org/r/df68e341-5113-4cf2-b64c-dc1ad0b686ac@omprussia.ru Signed-off-by: Sergey Shtylyov <s.shtylyov@omprussia.ru> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
221 lines
6.6 KiB
C
221 lines
6.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/module.h>
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#include <linux/io.h>
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#include <linux/isa.h>
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#include <scsi/scsi_host.h>
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#include "fdomain.h"
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#define MAXBOARDS_PARAM 4
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static int io[MAXBOARDS_PARAM] = { 0, 0, 0, 0 };
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module_param_hw_array(io, int, ioport, NULL, 0);
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MODULE_PARM_DESC(io, "base I/O address of controller (0x140, 0x150, 0x160, 0x170)");
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static int irq[MAXBOARDS_PARAM] = { 0, 0, 0, 0 };
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module_param_hw_array(irq, int, irq, NULL, 0);
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MODULE_PARM_DESC(irq, "IRQ of controller (0=auto [default])");
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static int scsi_id[MAXBOARDS_PARAM] = { 0, 0, 0, 0 };
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module_param_hw_array(scsi_id, int, other, NULL, 0);
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MODULE_PARM_DESC(scsi_id, "SCSI ID of controller (default = 7)");
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static unsigned long addresses[] = {
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0xc8000,
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0xca000,
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0xce000,
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0xde000,
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};
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#define ADDRESS_COUNT ARRAY_SIZE(addresses)
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static unsigned short ports[] = { 0x140, 0x150, 0x160, 0x170 };
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#define PORT_COUNT ARRAY_SIZE(ports)
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static unsigned short irqs[] = { 3, 5, 10, 11, 12, 14, 15, 0 };
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/* This driver works *ONLY* for Future Domain cards using the TMC-1800,
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* TMC-18C50, or TMC-18C30 chip. This includes models TMC-1650, 1660, 1670,
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* and 1680. These are all 16-bit cards.
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* BIOS versions prior to 3.2 assigned SCSI ID 6 to SCSI adapter.
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*
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* The following BIOS signature signatures are for boards which do *NOT*
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* work with this driver (these TMC-8xx and TMC-9xx boards may work with the
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* Seagate driver):
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*
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* FUTURE DOMAIN CORP. (C) 1986-1988 V4.0I 03/16/88
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* FUTURE DOMAIN CORP. (C) 1986-1989 V5.0C2/14/89
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* FUTURE DOMAIN CORP. (C) 1986-1989 V6.0A7/28/89
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* FUTURE DOMAIN CORP. (C) 1986-1990 V6.0105/31/90
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* FUTURE DOMAIN CORP. (C) 1986-1990 V6.0209/18/90
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* FUTURE DOMAIN CORP. (C) 1986-1990 V7.009/18/90
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* FUTURE DOMAIN CORP. (C) 1992 V8.00.004/02/92
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*
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* (The cards which do *NOT* work are all 8-bit cards -- although some of
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* them have a 16-bit form-factor, the upper 8-bits are used only for IRQs
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* and are *NOT* used for data. You can tell the difference by following
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* the tracings on the circuit board -- if only the IRQ lines are involved,
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* you have a "8-bit" card, and should *NOT* use this driver.)
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*/
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static struct signature {
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const char *signature;
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int offset;
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int length;
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int this_id;
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int base_offset;
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} signatures[] = {
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/* 1 2 3 4 5 6 */
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/* 123456789012345678901234567890123456789012345678901234567890 */
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{ "FUTURE DOMAIN CORP. (C) 1986-1990 1800-V2.07/28/89", 5, 50, 6, 0x1fcc },
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{ "FUTURE DOMAIN CORP. (C) 1986-1990 1800-V1.07/28/89", 5, 50, 6, 0x1fcc },
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{ "FUTURE DOMAIN CORP. (C) 1986-1990 1800-V2.07/28/89", 72, 50, 6, 0x1fa2 },
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{ "FUTURE DOMAIN CORP. (C) 1986-1990 1800-V2.0", 73, 43, 6, 0x1fa2 },
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{ "FUTURE DOMAIN CORP. (C) 1991 1800-V2.0.", 72, 39, 6, 0x1fa3 },
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{ "FUTURE DOMAIN CORP. (C) 1992 V3.00.004/02/92", 5, 44, 6, 0 },
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{ "FUTURE DOMAIN TMC-18XX (C) 1993 V3.203/12/93", 5, 44, 7, 0 },
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{ "IBM F1 P2 BIOS v1.0011/09/92", 5, 28, 7, 0x1ff3 },
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{ "IBM F1 P2 BIOS v1.0104/29/93", 5, 28, 7, 0 },
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{ "Future Domain Corp. V1.0008/18/93", 5, 33, 7, 0 },
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{ "Future Domain Corp. V2.0108/18/93", 5, 33, 7, 0 },
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{ "FUTURE DOMAIN CORP. V3.5008/18/93", 5, 34, 7, 0 },
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{ "FUTURE DOMAIN 18c30/18c50/1800 (C) 1994 V3.5", 5, 44, 7, 0 },
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{ "FUTURE DOMAIN CORP. V3.6008/18/93", 5, 34, 7, 0 },
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{ "FUTURE DOMAIN CORP. V3.6108/18/93", 5, 34, 7, 0 },
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};
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#define SIGNATURE_COUNT ARRAY_SIZE(signatures)
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static int fdomain_isa_match(struct device *dev, unsigned int ndev)
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{
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struct Scsi_Host *sh;
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int i, base = 0, irq = 0;
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unsigned long bios_base = 0;
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struct signature *sig = NULL;
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void __iomem *p;
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static struct signature *saved_sig;
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int this_id = 7;
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if (ndev < ADDRESS_COUNT) { /* scan supported ISA BIOS addresses */
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p = ioremap(addresses[ndev], FDOMAIN_BIOS_SIZE);
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if (!p)
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return 0;
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for (i = 0; i < SIGNATURE_COUNT; i++)
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if (check_signature(p + signatures[i].offset,
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signatures[i].signature,
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signatures[i].length))
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break;
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if (i == SIGNATURE_COUNT) /* no signature found */
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goto fail_unmap;
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sig = &signatures[i];
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bios_base = addresses[ndev];
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/* read I/O base from BIOS area */
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if (sig->base_offset)
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base = readb(p + sig->base_offset) +
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(readb(p + sig->base_offset + 1) << 8);
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iounmap(p);
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if (base) {
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dev_info(dev, "BIOS at 0x%lx specifies I/O base 0x%x\n",
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bios_base, base);
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} else { /* no I/O base in BIOS area */
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dev_info(dev, "BIOS at 0x%lx\n", bios_base);
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/* save BIOS signature for later use in port probing */
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saved_sig = sig;
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return 0;
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}
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} else /* scan supported I/O ports */
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base = ports[ndev - ADDRESS_COUNT];
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/* use saved BIOS signature if present */
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if (!sig && saved_sig)
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sig = saved_sig;
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if (!request_region(base, FDOMAIN_REGION_SIZE, "fdomain_isa"))
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return 0;
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irq = irqs[(inb(base + REG_CFG1) & CFG1_IRQ_MASK) >> 1];
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if (sig)
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this_id = sig->this_id;
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sh = fdomain_create(base, irq, this_id, dev);
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if (!sh) {
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release_region(base, FDOMAIN_REGION_SIZE);
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return 0;
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}
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dev_set_drvdata(dev, sh);
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return 1;
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fail_unmap:
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iounmap(p);
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return 0;
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}
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static int fdomain_isa_param_match(struct device *dev, unsigned int ndev)
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{
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struct Scsi_Host *sh;
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int irq_ = irq[ndev];
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if (!io[ndev])
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return 0;
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if (!request_region(io[ndev], FDOMAIN_REGION_SIZE, "fdomain_isa")) {
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dev_err(dev, "base 0x%x already in use", io[ndev]);
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return 0;
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}
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if (irq_ <= 0)
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irq_ = irqs[(inb(io[ndev] + REG_CFG1) & CFG1_IRQ_MASK) >> 1];
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sh = fdomain_create(io[ndev], irq_, scsi_id[ndev], dev);
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if (!sh) {
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dev_err(dev, "controller not found at base 0x%x", io[ndev]);
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release_region(io[ndev], FDOMAIN_REGION_SIZE);
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return 0;
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}
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dev_set_drvdata(dev, sh);
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return 1;
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}
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static int fdomain_isa_remove(struct device *dev, unsigned int ndev)
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{
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struct Scsi_Host *sh = dev_get_drvdata(dev);
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int base = sh->io_port;
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fdomain_destroy(sh);
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release_region(base, FDOMAIN_REGION_SIZE);
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dev_set_drvdata(dev, NULL);
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return 0;
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}
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static struct isa_driver fdomain_isa_driver = {
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.match = fdomain_isa_match,
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.remove = fdomain_isa_remove,
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.driver = {
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.name = "fdomain_isa",
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.pm = FDOMAIN_PM_OPS,
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},
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};
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static int __init fdomain_isa_init(void)
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{
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int isa_probe_count = ADDRESS_COUNT + PORT_COUNT;
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if (io[0]) { /* use module parameters if present */
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fdomain_isa_driver.match = fdomain_isa_param_match;
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isa_probe_count = MAXBOARDS_PARAM;
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}
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return isa_register_driver(&fdomain_isa_driver, isa_probe_count);
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}
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static void __exit fdomain_isa_exit(void)
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{
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isa_unregister_driver(&fdomain_isa_driver);
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}
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module_init(fdomain_isa_init);
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module_exit(fdomain_isa_exit);
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MODULE_AUTHOR("Ondrej Zary, Rickard E. Faith");
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MODULE_DESCRIPTION("Future Domain TMC-16x0 ISA SCSI driver");
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MODULE_LICENSE("GPL");
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