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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Trantor T128/T128F/T228 driver
3 * Note : architecturally, the T100 and T130 are different and won't
4 * work
5 *
6 * Copyright 1993, Drew Eckhardt
7 * Visionary Computing
8 * (Unix and Linux consulting and custom programming)
9 * drew@colorado.edu
10 * +1 (303) 440-4894
11 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070012 * For more information, please consult
13 *
14 * Trantor Systems, Ltd.
15 * T128/T128F/T228 SCSI Host Adapter
16 * Hardware Specifications
17 *
18 * Trantor Systems, Ltd.
19 * 5415 Randall Place
20 * Fremont, CA 94538
21 * 1+ (415) 770-1400, FAX 1+ (415) 770-9910
Linus Torvalds1da177e2005-04-16 15:20:36 -070022 */
23
24/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070025 * The card is detected and initialized in one of several ways :
26 * 1. Autoprobe (default) - since the board is memory mapped,
27 * a BIOS signature is scanned for to locate the registers.
28 * An interrupt is triggered to autoprobe for the interrupt
29 * line.
30 *
31 * 2. With command line overrides - t128=address,irq may be
32 * used on the LILO command line to override the defaults.
33 *
34 * 3. With the T128_OVERRIDE compile time define. This is
35 * specified as an array of address, irq tuples. Ie, for
36 * one board at the default 0xcc000 address, IRQ5, I could say
37 * -DT128_OVERRIDE={{0xcc000, 5}}
38 *
39 * Note that if the override methods are used, place holders must
40 * be specified for other boards in the system.
41 *
42 * T128/T128F jumper/dipswitch settings (note : on my sample, the switches
43 * were epoxy'd shut, meaning I couldn't change the 0xcc000 base address) :
44 *
45 * T128 Sw7 Sw8 Sw6 = 0ws Sw5 = boot
46 * T128F Sw6 Sw7 Sw5 = 0ws Sw4 = boot Sw8 = floppy disable
47 * cc000 off off
48 * c8000 off on
49 * dc000 on off
50 * d8000 on on
51 *
52 *
53 * Interrupts
54 * There is a 12 pin jumper block, jp1, numbered as follows :
55 * T128 (JP1) T128F (J5)
56 * 2 4 6 8 10 12 11 9 7 5 3 1
57 * 1 3 5 7 9 11 12 10 8 6 4 2
58 *
59 * 3 2-4
60 * 5 1-3
61 * 7 3-5
62 * T128F only
63 * 10 8-10
64 * 12 7-9
65 * 14 10-12
66 * 15 9-11
67 */
68
Matthew Wilcox53d5ed62006-10-11 01:22:01 -070069#include <linux/io.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070070#include <linux/blkdev.h>
71#include <linux/interrupt.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070072#include <linux/init.h>
73#include <linux/module.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070074
Linus Torvalds1da177e2005-04-16 15:20:36 -070075#include <scsi/scsi_host.h>
76#include "t128.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070077#include "NCR5380.h"
78
79static struct override {
80 unsigned long address;
81 int irq;
Tobias Klauser6391a112006-06-08 22:23:48 -070082} overrides
Linus Torvalds1da177e2005-04-16 15:20:36 -070083#ifdef T128_OVERRIDE
84 [] __initdata = T128_OVERRIDE;
85#else
Tobias Klauser6391a112006-06-08 22:23:48 -070086 [4] __initdata = {{0, IRQ_AUTO}, {0, IRQ_AUTO},
Linus Torvalds1da177e2005-04-16 15:20:36 -070087 {0 ,IRQ_AUTO}, {0, IRQ_AUTO}};
88#endif
89
Tobias Klauser6391a112006-06-08 22:23:48 -070090#define NO_OVERRIDES ARRAY_SIZE(overrides)
Linus Torvalds1da177e2005-04-16 15:20:36 -070091
92static struct base {
93 unsigned int address;
94 int noauto;
95} bases[] __initdata = {
96 { 0xcc000, 0}, { 0xc8000, 0}, { 0xdc000, 0}, { 0xd8000, 0}
97};
98
Tobias Klauser6391a112006-06-08 22:23:48 -070099#define NO_BASES ARRAY_SIZE(bases)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100
101static struct signature {
102 const char *string;
103 int offset;
104} signatures[] __initdata = {
105{"TSROM: SCSI BIOS, Version 1.12", 0x36},
106};
107
Tobias Klauser6391a112006-06-08 22:23:48 -0700108#define NO_SIGNATURES ARRAY_SIZE(signatures)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109
Finn Thain925e4612014-11-12 16:11:49 +1100110#ifndef MODULE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111/*
112 * Function : t128_setup(char *str, int *ints)
113 *
114 * Purpose : LILO command line initialization of the overrides array,
115 *
116 * Inputs : str - unused, ints - array of integer parameters with ints[0]
117 * equal to the number of ints.
118 *
119 */
120
Finn Thain925e4612014-11-12 16:11:49 +1100121static int __init t128_setup(char *str)
122{
Finn Thaind5f7e652016-01-03 16:05:03 +1100123 static int commandline_current;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124 int i;
Finn Thain925e4612014-11-12 16:11:49 +1100125 int ints[10];
126
127 get_options(str, ARRAY_SIZE(ints), ints);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128 if (ints[0] != 2)
129 printk("t128_setup : usage t128=address,irq\n");
130 else
131 if (commandline_current < NO_OVERRIDES) {
132 overrides[commandline_current].address = ints[1];
133 overrides[commandline_current].irq = ints[2];
134 for (i = 0; i < NO_BASES; ++i)
135 if (bases[i].address == ints[1]) {
136 bases[i].noauto = 1;
137 break;
138 }
139 ++commandline_current;
140 }
Finn Thain925e4612014-11-12 16:11:49 +1100141 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142}
143
Finn Thain925e4612014-11-12 16:11:49 +1100144__setup("t128=", t128_setup);
145#endif
146
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147/*
Christoph Hellwigd0be4a7d2005-10-31 18:31:40 +0100148 * Function : int t128_detect(struct scsi_host_template * tpnt)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149 *
150 * Purpose : detects and initializes T128,T128F, or T228 controllers
151 * that were autoprobed, overridden on the LILO command line,
152 * or specified at compile time.
153 *
154 * Inputs : tpnt - template for this SCSI adapter.
155 *
156 * Returns : 1 if a host adapter was found, 0 if not.
157 *
158 */
159
Finn Thained8b9e72014-11-12 16:11:51 +1100160static int __init t128_detect(struct scsi_host_template *tpnt)
161{
Finn Thaind5f7e652016-01-03 16:05:03 +1100162 static int current_override, current_base;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163 struct Scsi_Host *instance;
164 unsigned long base;
165 void __iomem *p;
166 int sig, count;
167
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168 for (count = 0; current_override < NO_OVERRIDES; ++current_override) {
169 base = 0;
170 p = NULL;
171
172 if (overrides[current_override].address) {
173 base = overrides[current_override].address;
174 p = ioremap(bases[current_base].address, 0x2000);
175 if (!p)
176 base = 0;
177 } else
178 for (; !base && (current_base < NO_BASES); ++current_base) {
Finn Thain2f7dba92016-01-03 16:05:04 +1100179 dprintk(NDEBUG_INIT, "t128: probing address 0x%08x\n",
180 bases[current_base].address);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181 if (bases[current_base].noauto)
182 continue;
183 p = ioremap(bases[current_base].address, 0x2000);
184 if (!p)
185 continue;
186 for (sig = 0; sig < NO_SIGNATURES; ++sig)
187 if (check_signature(p + signatures[sig].offset,
188 signatures[sig].string,
189 strlen(signatures[sig].string))) {
190 base = bases[current_base].address;
Finn Thain2f7dba92016-01-03 16:05:04 +1100191 dprintk(NDEBUG_INIT, "t128: detected board\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192 goto found;
193 }
194 iounmap(p);
195 }
196
Finn Thain2f7dba92016-01-03 16:05:04 +1100197 dprintk(NDEBUG_INIT, "t128: base = 0x%08x\n", (unsigned int)base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198
199 if (!base)
200 break;
201
202found:
203 instance = scsi_register (tpnt, sizeof(struct NCR5380_hostdata));
204 if(instance == NULL)
Finn Thain0ad0eff2016-01-03 16:05:21 +1100205 goto out_unmap;
206
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207 instance->base = base;
208 ((struct NCR5380_hostdata *)instance->hostdata)->base = p;
209
Finn Thain8053b0e2016-03-23 21:10:19 +1100210 if (NCR5380_init(instance, FLAG_DMA_FIXUP | FLAG_LATE_DMA_SETUP))
Finn Thain0ad0eff2016-01-03 16:05:21 +1100211 goto out_unregister;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212
Finn Thainb6488f92016-01-03 16:05:08 +1100213 NCR5380_maybe_reset_bus(instance);
214
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215 if (overrides[current_override].irq != IRQ_AUTO)
216 instance->irq = overrides[current_override].irq;
217 else
218 instance->irq = NCR5380_probe_irq(instance, T128_IRQS);
219
Finn Thain22f5f102014-11-12 16:11:56 +1100220 /* Compatibility with documented NCR5380 kernel parameters */
221 if (instance->irq == 255)
222 instance->irq = NO_IRQ;
223
224 if (instance->irq != NO_IRQ)
Michael Opdenacker4909cc22014-03-05 06:09:41 +0100225 if (request_irq(instance->irq, t128_intr, 0, "t128",
Jeff Garzik1e641662007-11-11 19:52:05 -0500226 instance)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227 printk("scsi%d : IRQ%d not free, interrupts disabled\n",
228 instance->host_no, instance->irq);
Finn Thain22f5f102014-11-12 16:11:56 +1100229 instance->irq = NO_IRQ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230 }
231
Finn Thain22f5f102014-11-12 16:11:56 +1100232 if (instance->irq == NO_IRQ) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233 printk("scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no);
234 printk("scsi%d : please jumper the board for a free IRQ.\n", instance->host_no);
235 }
236
Finn Thain2f7dba92016-01-03 16:05:04 +1100237 dprintk(NDEBUG_INIT, "scsi%d: irq = %d\n",
238 instance->host_no, instance->irq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240 ++current_override;
241 ++count;
242 }
243 return count;
Finn Thain0ad0eff2016-01-03 16:05:21 +1100244
245out_unregister:
246 scsi_unregister(instance);
247out_unmap:
248 iounmap(p);
249 return count;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250}
251
252static int t128_release(struct Scsi_Host *shost)
253{
Finn Thain54d8fe42016-01-03 16:05:06 +1100254 struct NCR5380_hostdata *hostdata = shost_priv(shost);
255
Finn Thain22f5f102014-11-12 16:11:56 +1100256 if (shost->irq != NO_IRQ)
Jeff Garzik1e641662007-11-11 19:52:05 -0500257 free_irq(shost->irq, shost);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258 NCR5380_exit(shost);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259 scsi_unregister(shost);
Finn Thain54d8fe42016-01-03 16:05:06 +1100260 iounmap(hostdata->base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261 return 0;
262}
263
264/*
265 * Function : int t128_biosparam(Disk * disk, struct block_device *dev, int *ip)
266 *
267 * Purpose : Generates a BIOS / DOS compatible H-C-S mapping for
268 * the specified device / size.
269 *
270 * Inputs : size = size of device in sectors (512 bytes), dev = block device
271 * major / minor, ip[] = {heads, sectors, cylinders}
272 *
273 * Returns : always 0 (success), initializes ip
274 *
275 */
276
277/*
278 * XXX Most SCSI boards use this mapping, I could be incorrect. Some one
279 * using hard disks on a trantor should verify that this mapping corresponds
280 * to that used by the BIOS / ASPI driver by running the linux fdisk program
281 * and matching the H_C_S coordinates to what DOS uses.
282 */
283
Finn Thained8b9e72014-11-12 16:11:51 +1100284static int t128_biosparam(struct scsi_device *sdev, struct block_device *bdev,
285 sector_t capacity, int *ip)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286{
287 ip[0] = 64;
288 ip[1] = 32;
289 ip[2] = capacity >> 11;
290 return 0;
291}
292
293/*
Finn Thain6c4b88c2016-03-23 21:10:17 +1100294 * Function : int t128_pread (struct Scsi_Host *instance,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295 * unsigned char *dst, int len)
296 *
297 * Purpose : Fast 5380 pseudo-dma read function, transfers len bytes to
298 * dst
299 *
300 * Inputs : dst = destination, len = length in bytes
301 *
302 * Returns : 0 on success, non zero on a failure such as a watchdog
303 * timeout.
304 */
305
Finn Thain6c4b88c2016-03-23 21:10:17 +1100306static inline int t128_pread(struct Scsi_Host *instance,
307 unsigned char *dst, int len)
Finn Thain54d8fe42016-01-03 16:05:06 +1100308{
309 struct NCR5380_hostdata *hostdata = shost_priv(instance);
310 void __iomem *reg, *base = hostdata->base;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311 unsigned char *d = dst;
312 register int i = len;
313
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314 reg = base + T_DATA_REG_OFFSET;
315
316#if 0
317 for (; i; --i) {
318 while (!(readb(base+T_STATUS_REG_OFFSET) & T_ST_RDY)) barrier();
319#else
320 while (!(readb(base+T_STATUS_REG_OFFSET) & T_ST_RDY)) barrier();
321 for (; i; --i) {
322#endif
323 *d++ = readb(reg);
324 }
325
326 if (readb(base + T_STATUS_REG_OFFSET) & T_ST_TIM) {
327 unsigned char tmp;
328 void __iomem *foo = base + T_CONTROL_REG_OFFSET;
329 tmp = readb(foo);
330 writeb(tmp | T_CR_CT, foo);
331 writeb(tmp, foo);
332 printk("scsi%d : watchdog timer fired in NCR5380_pread()\n",
333 instance->host_no);
334 return -1;
335 } else
336 return 0;
337}
338
339/*
Finn Thain6c4b88c2016-03-23 21:10:17 +1100340 * Function : int t128_pwrite (struct Scsi_Host *instance,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341 * unsigned char *src, int len)
342 *
343 * Purpose : Fast 5380 pseudo-dma write function, transfers len bytes from
344 * src
345 *
346 * Inputs : src = source, len = length in bytes
347 *
348 * Returns : 0 on success, non zero on a failure such as a watchdog
349 * timeout.
350 */
351
Finn Thain6c4b88c2016-03-23 21:10:17 +1100352static inline int t128_pwrite(struct Scsi_Host *instance,
353 unsigned char *src, int len)
Finn Thain54d8fe42016-01-03 16:05:06 +1100354{
355 struct NCR5380_hostdata *hostdata = shost_priv(instance);
356 void __iomem *reg, *base = hostdata->base;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357 unsigned char *s = src;
358 register int i = len;
359
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360 reg = base + T_DATA_REG_OFFSET;
361
362#if 0
363 for (; i; --i) {
364 while (!(readb(base+T_STATUS_REG_OFFSET) & T_ST_RDY)) barrier();
365#else
366 while (!(readb(base+T_STATUS_REG_OFFSET) & T_ST_RDY)) barrier();
367 for (; i; --i) {
368#endif
369 writeb(*s++, reg);
370 }
371
372 if (readb(base + T_STATUS_REG_OFFSET) & T_ST_TIM) {
373 unsigned char tmp;
374 void __iomem *foo = base + T_CONTROL_REG_OFFSET;
375 tmp = readb(foo);
376 writeb(tmp | T_CR_CT, foo);
377 writeb(tmp, foo);
378 printk("scsi%d : watchdog timer fired in NCR5380_pwrite()\n",
379 instance->host_no);
380 return -1;
381 } else
382 return 0;
383}
384
385MODULE_LICENSE("GPL");
386
387#include "NCR5380.c"
388
Christoph Hellwigd0be4a7d2005-10-31 18:31:40 +0100389static struct scsi_host_template driver_template = {
Finn Thainaa2e2cb2016-01-03 16:05:48 +1100390 .name = "Trantor T128/T128F/T228",
391 .detect = t128_detect,
392 .release = t128_release,
393 .proc_name = "t128",
Finn Thainaa2e2cb2016-01-03 16:05:48 +1100394 .info = t128_info,
395 .queuecommand = t128_queue_command,
396 .eh_abort_handler = t128_abort,
397 .eh_bus_reset_handler = t128_bus_reset,
398 .bios_param = t128_biosparam,
399 .can_queue = 32,
400 .this_id = 7,
401 .sg_tablesize = SG_ALL,
402 .cmd_per_lun = 2,
403 .use_clustering = DISABLE_CLUSTERING,
Finn Thain32b26a12016-01-03 16:05:58 +1100404 .cmd_size = NCR5380_CMD_SIZE,
Finn Thain0a4e3612016-01-03 16:06:07 +1100405 .max_sectors = 128,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406};
407#include "scsi_module.c"