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
fdomain_isa_match(struct device * dev,unsigned int ndev)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
fdomain_isa_param_match(struct device * dev,unsigned int ndev)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
fdomain_isa_remove(struct device * dev,unsigned int ndev)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
fdomain_isa_init(void)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
fdomain_isa_exit(void)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");
220