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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Copyright (C) 1996-2001 Linus Torvalds & author (see below) |
3 | */ | |
4 | ||
5 | /* | |
6 | * Version 0.03 Cleaned auto-tune, added probe | |
7 | * Version 0.04 Added second channel tuning | |
8 | * Version 0.05 Enhanced tuning ; added qd6500 support | |
9 | * Version 0.06 Added dos driver's list | |
10 | * Version 0.07 Second channel bug fix | |
11 | * | |
12 | * QDI QD6500/QD6580 EIDE controller fast support | |
13 | * | |
14 | * Please set local bus speed using kernel parameter idebus | |
15 | * for example, "idebus=33" stands for 33Mhz VLbus | |
16 | * To activate controller support, use "ide0=qd65xx" | |
b6209a90 BZ |
17 | * To enable tuning, use "hda=autotune hdb=autotune" |
18 | * To enable 2nd channel tuning (qd6580 only), use "hdc=autotune hdd=autotune" | |
1da177e4 LT |
19 | */ |
20 | ||
21 | /* | |
22 | * Rewritten from the work of Colten Edwards <pje120@cs.usask.ca> by | |
23 | * Samuel Thibault <samuel.thibault@fnac.net> | |
24 | */ | |
25 | ||
1da177e4 | 26 | #include <linux/module.h> |
1da177e4 LT |
27 | #include <linux/types.h> |
28 | #include <linux/kernel.h> | |
29 | #include <linux/delay.h> | |
30 | #include <linux/timer.h> | |
31 | #include <linux/mm.h> | |
32 | #include <linux/ioport.h> | |
33 | #include <linux/blkdev.h> | |
34 | #include <linux/hdreg.h> | |
35 | #include <linux/ide.h> | |
36 | #include <linux/init.h> | |
37 | #include <asm/system.h> | |
38 | #include <asm/io.h> | |
39 | ||
40 | #include "qd65xx.h" | |
41 | ||
42 | /* | |
43 | * I/O ports are 0x30-0x31 (and 0x32-0x33 for qd6580) | |
44 | * or 0xb0-0xb1 (and 0xb2-0xb3 for qd6580) | |
45 | * -- qd6500 is a single IDE interface | |
46 | * -- qd6580 is a dual IDE interface | |
47 | * | |
48 | * More research on qd6580 being done by willmore@cig.mot.com (David) | |
49 | * More Information given by Petr Soucek (petr@ryston.cz) | |
50 | * http://www.ryston.cz/petr/vlb | |
51 | */ | |
52 | ||
53 | /* | |
54 | * base: Timer1 | |
55 | * | |
56 | * | |
57 | * base+0x01: Config (R/O) | |
58 | * | |
59 | * bit 0: ide baseport: 1 = 0x1f0 ; 0 = 0x170 (only useful for qd6500) | |
60 | * bit 1: qd65xx baseport: 1 = 0xb0 ; 0 = 0x30 | |
61 | * bit 2: ID3: bus speed: 1 = <=33MHz ; 0 = >33MHz | |
62 | * bit 3: qd6500: 1 = disabled, 0 = enabled | |
63 | * qd6580: 1 | |
64 | * upper nibble: | |
65 | * qd6500: 1100 | |
66 | * qd6580: either 1010 or 0101 | |
67 | * | |
68 | * | |
69 | * base+0x02: Timer2 (qd6580 only) | |
70 | * | |
71 | * | |
72 | * base+0x03: Control (qd6580 only) | |
73 | * | |
74 | * bits 0-3 must always be set 1 | |
75 | * bit 4 must be set 1, but is set 0 by dos driver while measuring vlb clock | |
76 | * bit 0 : 1 = Only primary port enabled : channel 0 for hda, channel 1 for hdb | |
77 | * 0 = Primary and Secondary ports enabled : channel 0 for hda & hdb | |
78 | * channel 1 for hdc & hdd | |
79 | * bit 1 : 1 = only disks on primary port | |
80 | * 0 = disks & ATAPI devices on primary port | |
81 | * bit 2-4 : always 0 | |
82 | * bit 5 : status, but of what ? | |
83 | * bit 6 : always set 1 by dos driver | |
84 | * bit 7 : set 1 for non-ATAPI devices on primary port | |
85 | * (maybe read-ahead and post-write buffer ?) | |
86 | */ | |
87 | ||
88 | static int timings[4]={-1,-1,-1,-1}; /* stores current timing for each timer */ | |
89 | ||
1da177e4 LT |
90 | /* |
91 | * qd_select: | |
92 | * | |
93 | * This routine is invoked from ide.c to prepare for access to a given drive. | |
94 | */ | |
95 | ||
96 | static void qd_select (ide_drive_t *drive) | |
97 | { | |
98 | u8 index = (( (QD_TIMREG(drive)) & 0x80 ) >> 7) | | |
99 | (QD_TIMREG(drive) & 0x02); | |
100 | ||
101 | if (timings[index] != QD_TIMING(drive)) | |
c196567a | 102 | outb(timings[index] = QD_TIMING(drive), QD_TIMREG(drive)); |
1da177e4 LT |
103 | } |
104 | ||
105 | /* | |
106 | * qd6500_compute_timing | |
107 | * | |
108 | * computes the timing value where | |
109 | * lower nibble represents active time, in count of VLB clocks | |
110 | * upper nibble represents recovery time, in count of VLB clocks | |
111 | */ | |
112 | ||
113 | static u8 qd6500_compute_timing (ide_hwif_t *hwif, int active_time, int recovery_time) | |
114 | { | |
115 | u8 active_cycle,recovery_cycle; | |
116 | ||
117 | if (system_bus_clock()<=33) { | |
118 | active_cycle = 9 - IDE_IN(active_time * system_bus_clock() / 1000 + 1, 2, 9); | |
119 | recovery_cycle = 15 - IDE_IN(recovery_time * system_bus_clock() / 1000 + 1, 0, 15); | |
120 | } else { | |
121 | active_cycle = 8 - IDE_IN(active_time * system_bus_clock() / 1000 + 1, 1, 8); | |
122 | recovery_cycle = 18 - IDE_IN(recovery_time * system_bus_clock() / 1000 + 1, 3, 18); | |
123 | } | |
124 | ||
125 | return((recovery_cycle<<4) | 0x08 | active_cycle); | |
126 | } | |
127 | ||
128 | /* | |
129 | * qd6580_compute_timing | |
130 | * | |
131 | * idem for qd6580 | |
132 | */ | |
133 | ||
134 | static u8 qd6580_compute_timing (int active_time, int recovery_time) | |
135 | { | |
136 | u8 active_cycle = 17 - IDE_IN(active_time * system_bus_clock() / 1000 + 1, 2, 17); | |
137 | u8 recovery_cycle = 15 - IDE_IN(recovery_time * system_bus_clock() / 1000 + 1, 2, 15); | |
138 | ||
139 | return((recovery_cycle<<4) | active_cycle); | |
140 | } | |
141 | ||
142 | /* | |
143 | * qd_find_disk_type | |
144 | * | |
145 | * tries to find timing from dos driver's table | |
146 | */ | |
147 | ||
148 | static int qd_find_disk_type (ide_drive_t *drive, | |
149 | int *active_time, int *recovery_time) | |
150 | { | |
151 | struct qd65xx_timing_s *p; | |
152 | char model[40]; | |
153 | ||
154 | if (!*drive->id->model) return 0; | |
155 | ||
156 | strncpy(model,drive->id->model,40); | |
157 | ide_fixstring(model,40,1); /* byte-swap */ | |
158 | ||
159 | for (p = qd65xx_timing ; p->offset != -1 ; p++) { | |
160 | if (!strncmp(p->model, model+p->offset, 4)) { | |
161 | printk(KERN_DEBUG "%s: listed !\n", drive->name); | |
162 | *active_time = p->active; | |
163 | *recovery_time = p->recovery; | |
164 | return 1; | |
165 | } | |
166 | } | |
167 | return 0; | |
168 | } | |
169 | ||
170 | /* | |
171 | * qd_timing_ok: | |
172 | * | |
173 | * check whether timings don't conflict | |
174 | */ | |
175 | ||
176 | static int qd_timing_ok (ide_drive_t drives[]) | |
177 | { | |
178 | return (IDE_IMPLY(drives[0].present && drives[1].present, | |
179 | IDE_IMPLY(QD_TIMREG(drives) == QD_TIMREG(drives+1), | |
180 | QD_TIMING(drives) == QD_TIMING(drives+1)))); | |
181 | /* if same timing register, must be same timing */ | |
182 | } | |
183 | ||
184 | /* | |
185 | * qd_set_timing: | |
186 | * | |
187 | * records the timing, and enables selectproc as needed | |
188 | */ | |
189 | ||
190 | static void qd_set_timing (ide_drive_t *drive, u8 timing) | |
191 | { | |
192 | ide_hwif_t *hwif = HWIF(drive); | |
193 | ||
194 | drive->drive_data &= 0xff00; | |
195 | drive->drive_data |= timing; | |
196 | if (qd_timing_ok(hwif->drives)) { | |
197 | qd_select(drive); /* selects once */ | |
198 | hwif->selectproc = NULL; | |
199 | } else | |
200 | hwif->selectproc = &qd_select; | |
201 | ||
202 | printk(KERN_DEBUG "%s: %#x\n", drive->name, timing); | |
203 | } | |
204 | ||
26bcb879 | 205 | static void qd6500_set_pio_mode(ide_drive_t *drive, const u8 pio) |
1da177e4 LT |
206 | { |
207 | int active_time = 175; | |
208 | int recovery_time = 415; /* worst case values from the dos driver */ | |
209 | ||
26bcb879 BZ |
210 | /* |
211 | * FIXME: use "pio" value | |
212 | */ | |
1da177e4 LT |
213 | if (drive->id && !qd_find_disk_type(drive, &active_time, &recovery_time) |
214 | && drive->id->tPIO && (drive->id->field_valid & 0x02) | |
215 | && drive->id->eide_pio >= 240) { | |
216 | ||
217 | printk(KERN_INFO "%s: PIO mode%d\n", drive->name, | |
218 | drive->id->tPIO); | |
219 | active_time = 110; | |
220 | recovery_time = drive->id->eide_pio - 120; | |
221 | } | |
222 | ||
223 | qd_set_timing(drive, qd6500_compute_timing(HWIF(drive), active_time, recovery_time)); | |
224 | } | |
225 | ||
26bcb879 | 226 | static void qd6580_set_pio_mode(ide_drive_t *drive, const u8 pio) |
1da177e4 | 227 | { |
1da177e4 | 228 | int base = HWIF(drive)->select_data; |
7dd00083 | 229 | unsigned int cycle_time; |
1da177e4 LT |
230 | int active_time = 175; |
231 | int recovery_time = 415; /* worst case values from the dos driver */ | |
232 | ||
233 | if (drive->id && !qd_find_disk_type(drive, &active_time, &recovery_time)) { | |
7dd00083 | 234 | cycle_time = ide_pio_cycle_time(drive, pio); |
1da177e4 LT |
235 | |
236 | switch (pio) { | |
237 | case 0: break; | |
238 | case 3: | |
7dd00083 | 239 | if (cycle_time >= 110) { |
1da177e4 | 240 | active_time = 86; |
7dd00083 | 241 | recovery_time = cycle_time - 102; |
1da177e4 LT |
242 | } else |
243 | printk(KERN_WARNING "%s: Strange recovery time !\n",drive->name); | |
244 | break; | |
245 | case 4: | |
7dd00083 | 246 | if (cycle_time >= 69) { |
1da177e4 | 247 | active_time = 70; |
7dd00083 | 248 | recovery_time = cycle_time - 61; |
1da177e4 LT |
249 | } else |
250 | printk(KERN_WARNING "%s: Strange recovery time !\n",drive->name); | |
251 | break; | |
252 | default: | |
7dd00083 | 253 | if (cycle_time >= 180) { |
1da177e4 | 254 | active_time = 110; |
7dd00083 | 255 | recovery_time = cycle_time - 120; |
1da177e4 LT |
256 | } else { |
257 | active_time = ide_pio_timings[pio].active_time; | |
7dd00083 | 258 | recovery_time = cycle_time - active_time; |
1da177e4 LT |
259 | } |
260 | } | |
261 | printk(KERN_INFO "%s: PIO mode%d\n", drive->name,pio); | |
262 | } | |
263 | ||
264 | if (!HWIF(drive)->channel && drive->media != ide_disk) { | |
c196567a | 265 | outb(0x5f, QD_CONTROL_PORT); |
1da177e4 LT |
266 | printk(KERN_WARNING "%s: ATAPI: disabled read-ahead FIFO " |
267 | "and post-write buffer on %s.\n", | |
268 | drive->name, HWIF(drive)->name); | |
269 | } | |
270 | ||
271 | qd_set_timing(drive, qd6580_compute_timing(active_time, recovery_time)); | |
272 | } | |
273 | ||
274 | /* | |
275 | * qd_testreg | |
276 | * | |
277 | * tests if the given port is a register | |
278 | */ | |
279 | ||
280 | static int __init qd_testreg(int port) | |
281 | { | |
1da177e4 | 282 | unsigned long flags; |
f949820d | 283 | u8 savereg, readreg; |
1da177e4 | 284 | |
c196567a | 285 | local_irq_save(flags); |
1da177e4 LT |
286 | savereg = inb_p(port); |
287 | outb_p(QD_TESTVAL, port); /* safe value */ | |
288 | readreg = inb_p(port); | |
289 | outb(savereg, port); | |
c196567a | 290 | local_irq_restore(flags); |
1da177e4 LT |
291 | |
292 | if (savereg == QD_TESTVAL) { | |
293 | printk(KERN_ERR "Outch ! the probe for qd65xx isn't reliable !\n"); | |
294 | printk(KERN_ERR "Please contact maintainers to tell about your hardware\n"); | |
295 | printk(KERN_ERR "Assuming qd65xx is not present.\n"); | |
296 | return 1; | |
297 | } | |
298 | ||
299 | return (readreg != QD_TESTVAL); | |
300 | } | |
301 | ||
302 | /* | |
303 | * qd_setup: | |
304 | * | |
305 | * called to setup an ata channel : adjusts attributes & links for tuning | |
306 | */ | |
307 | ||
1f2cf8b0 | 308 | static void __init qd_setup(ide_hwif_t *hwif, int base, int config) |
1da177e4 | 309 | { |
1da177e4 LT |
310 | hwif->select_data = base; |
311 | hwif->config_data = config; | |
1f2cf8b0 BZ |
312 | } |
313 | ||
314 | static void __init qd6500_port_init_devs(ide_hwif_t *hwif) | |
315 | { | |
316 | u8 base = hwif->select_data, config = QD_CONFIG(hwif); | |
317 | ||
318 | hwif->drives[0].drive_data = QD6500_DEF_DATA; | |
319 | hwif->drives[1].drive_data = QD6500_DEF_DATA; | |
320 | } | |
321 | ||
322 | static void __init qd6580_port_init_devs(ide_hwif_t *hwif) | |
323 | { | |
324 | u16 t1, t2; | |
325 | u8 base = hwif->select_data, config = QD_CONFIG(hwif); | |
326 | ||
327 | if (QD_CONTROL(hwif) & QD_CONTR_SEC_DISABLED) { | |
328 | t1 = QD6580_DEF_DATA; | |
329 | t2 = QD6580_DEF_DATA2; | |
330 | } else | |
331 | t2 = t1 = hwif->channel ? QD6580_DEF_DATA2 : QD6580_DEF_DATA; | |
332 | ||
333 | hwif->drives[0].drive_data = t1; | |
334 | hwif->drives[1].drive_data = t2; | |
1da177e4 LT |
335 | } |
336 | ||
c413b9b9 BZ |
337 | static const struct ide_port_info qd65xx_port_info __initdata = { |
338 | .chipset = ide_qd65xx, | |
339 | .host_flags = IDE_HFLAG_IO_32BIT | | |
340 | IDE_HFLAG_NO_DMA | | |
341 | IDE_HFLAG_NO_AUTOTUNE, | |
342 | .pio_mask = ATA_PIO4, | |
343 | }; | |
344 | ||
1da177e4 LT |
345 | /* |
346 | * qd_probe: | |
347 | * | |
348 | * looks at the specified baseport, and if qd found, registers & initialises it | |
349 | * return 1 if another qd may be probed | |
350 | */ | |
351 | ||
352 | static int __init qd_probe(int base) | |
353 | { | |
354 | ide_hwif_t *hwif; | |
8447d9d5 | 355 | u8 idx[4] = { 0xff, 0xff, 0xff, 0xff }; |
1da177e4 LT |
356 | u8 config; |
357 | u8 unit; | |
358 | ||
c196567a | 359 | config = inb(QD_CONFIG_PORT); |
1da177e4 LT |
360 | |
361 | if (! ((config & QD_CONFIG_BASEPORT) >> 1 == (base == 0xb0)) ) | |
362 | return 1; | |
363 | ||
364 | unit = ! (config & QD_CONFIG_IDE_BASEPORT); | |
365 | ||
366 | if ((config & 0xf0) == QD_CONFIG_QD6500) { | |
367 | ||
368 | if (qd_testreg(base)) return 1; /* bad register */ | |
369 | ||
370 | /* qd6500 found */ | |
371 | ||
372 | hwif = &ide_hwifs[unit]; | |
373 | printk(KERN_NOTICE "%s: qd6500 at %#x\n", hwif->name, base); | |
374 | printk(KERN_DEBUG "qd6500: config=%#x, ID3=%u\n", | |
375 | config, QD_ID3); | |
376 | ||
377 | if (config & QD_CONFIG_DISABLED) { | |
378 | printk(KERN_WARNING "qd6500 is disabled !\n"); | |
379 | return 1; | |
380 | } | |
381 | ||
1f2cf8b0 | 382 | qd_setup(hwif, base, config); |
26bcb879 | 383 | |
1f2cf8b0 | 384 | hwif->port_init_devs = qd6500_port_init_devs; |
26bcb879 BZ |
385 | hwif->set_pio_mode = &qd6500_set_pio_mode; |
386 | ||
c413b9b9 | 387 | idx[unit] = unit; |
1da177e4 | 388 | |
c413b9b9 | 389 | ide_device_add(idx, &qd65xx_port_info); |
1da177e4 LT |
390 | |
391 | return 1; | |
392 | } | |
393 | ||
394 | if (((config & 0xf0) == QD_CONFIG_QD6580_A) || | |
395 | ((config & 0xf0) == QD_CONFIG_QD6580_B)) { | |
396 | ||
397 | u8 control; | |
398 | ||
399 | if (qd_testreg(base) || qd_testreg(base+0x02)) return 1; | |
400 | /* bad registers */ | |
401 | ||
402 | /* qd6580 found */ | |
403 | ||
c196567a | 404 | control = inb(QD_CONTROL_PORT); |
1da177e4 LT |
405 | |
406 | printk(KERN_NOTICE "qd6580 at %#x\n", base); | |
407 | printk(KERN_DEBUG "qd6580: config=%#x, control=%#x, ID3=%u\n", | |
408 | config, control, QD_ID3); | |
409 | ||
788d6697 BZ |
410 | outb(QD_DEF_CONTR, QD_CONTROL_PORT); |
411 | ||
1da177e4 LT |
412 | if (control & QD_CONTR_SEC_DISABLED) { |
413 | /* secondary disabled */ | |
414 | ||
415 | hwif = &ide_hwifs[unit]; | |
416 | printk(KERN_INFO "%s: qd6580: single IDE board\n", | |
417 | hwif->name); | |
26bcb879 | 418 | |
1f2cf8b0 BZ |
419 | qd_setup(hwif, base, config | (control << 8)); |
420 | ||
421 | hwif->port_init_devs = qd6580_port_init_devs; | |
26bcb879 BZ |
422 | hwif->set_pio_mode = &qd6580_set_pio_mode; |
423 | ||
c413b9b9 | 424 | idx[unit] = unit; |
26bcb879 | 425 | |
c413b9b9 | 426 | ide_device_add(idx, &qd65xx_port_info); |
1da177e4 | 427 | |
1da177e4 LT |
428 | return 1; |
429 | } else { | |
430 | ide_hwif_t *mate; | |
431 | ||
432 | hwif = &ide_hwifs[0]; | |
433 | mate = &ide_hwifs[1]; | |
434 | /* secondary enabled */ | |
435 | printk(KERN_INFO "%s&%s: qd6580: dual IDE board\n", | |
436 | hwif->name, mate->name); | |
437 | ||
1f2cf8b0 | 438 | qd_setup(hwif, base, config | (control << 8)); |
26bcb879 | 439 | |
1f2cf8b0 | 440 | hwif->port_init_devs = qd6580_port_init_devs; |
26bcb879 BZ |
441 | hwif->set_pio_mode = &qd6580_set_pio_mode; |
442 | ||
1f2cf8b0 | 443 | qd_setup(mate, base, config | (control << 8)); |
26bcb879 | 444 | |
1f2cf8b0 | 445 | mate->port_init_devs = qd6580_port_init_devs; |
26bcb879 BZ |
446 | mate->set_pio_mode = &qd6580_set_pio_mode; |
447 | ||
8447d9d5 BZ |
448 | idx[0] = 0; |
449 | idx[1] = 1; | |
26bcb879 | 450 | |
c413b9b9 | 451 | ide_device_add(idx, &qd65xx_port_info); |
1da177e4 | 452 | |
1da177e4 LT |
453 | return 0; /* no other qd65xx possible */ |
454 | } | |
455 | } | |
456 | /* no qd65xx found */ | |
457 | return 1; | |
458 | } | |
459 | ||
84913882 BZ |
460 | int probe_qd65xx = 0; |
461 | ||
462 | module_param_named(probe, probe_qd65xx, bool, 0); | |
463 | MODULE_PARM_DESC(probe, "probe for QD65xx chipsets"); | |
464 | ||
ade2daf9 | 465 | static int __init qd65xx_init(void) |
1da177e4 | 466 | { |
84913882 BZ |
467 | if (probe_qd65xx == 0) |
468 | return -ENODEV; | |
469 | ||
1da177e4 LT |
470 | if (qd_probe(0x30)) |
471 | qd_probe(0xb0); | |
472 | if (ide_hwifs[0].chipset != ide_qd65xx && | |
473 | ide_hwifs[1].chipset != ide_qd65xx) | |
474 | return -ENODEV; | |
475 | return 0; | |
476 | } | |
477 | ||
1da177e4 | 478 | module_init(qd65xx_init); |
1da177e4 LT |
479 | |
480 | MODULE_AUTHOR("Samuel Thibault"); | |
481 | MODULE_DESCRIPTION("support of qd65xx vlb ide chipset"); | |
482 | MODULE_LICENSE("GPL"); |