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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [drivers/] [ide/] [legacy/] [qd65xx.c] - Blame information for rev 1275

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1 1275 phoenix 
/*
2 
 *  linux/drivers/ide/legacy/qd65xx.c           Version 0.07    Sep 30, 2001
3 
 *
4 
 *  Copyright (C) 1996-2001  Linus Torvalds & author (see below)
5 
 */
6 
 
7 
/*
8 
 *  Version 0.03        Cleaned auto-tune, added probe
9 
 *  Version 0.04        Added second channel tuning
10 
 *  Version 0.05        Enhanced tuning ; added qd6500 support
11 
 *  Version 0.06        Added dos driver's list
12 
 *  Version 0.07        Second channel bug fix
13 
 *
14 
 * QDI QD6500/QD6580 EIDE controller fast support
15 
 *
16 
 * Please set local bus speed using kernel parameter idebus
17 
 *      for example, "idebus=33" stands for 33Mhz VLbus
18 
 * To activate controller support, use "ide0=qd65xx"
19 
 * To enable tuning, use "ide0=autotune"
20 
 * To enable second channel tuning (qd6580 only), use "ide1=autotune"
21 
 */
22 
 
23 
/*
24 
 * Rewritten from the work of Colten Edwards <pje120@cs.usask.ca> by
25 
 * Samuel Thibault <samuel.thibault@fnac.net>
26 
 */
27 
 
28 
#undef REALLY_SLOW_IO           /* most systems can safely undef this */
29 
 
30 
#include <linux/module.h>
31 
#include <linux/config.h>
32 
#include <linux/types.h>
33 
#include <linux/kernel.h>
34 
#include <linux/delay.h>
35 
#include <linux/timer.h>
36 
#include <linux/mm.h>
37 
#include <linux/ioport.h>
38 
#include <linux/blkdev.h>
39 
#include <linux/hdreg.h>
40 
#include <linux/ide.h>
41 
#include <linux/init.h>
42 
#include <asm/system.h>
43 
#include <asm/io.h>
44 
 
45 
#ifdef CONFIG_BLK_DEV_QD65XX_MODULE
46 
# define _IDE_C
47 
# include "ide_modes.h"
48 
# undef _IDE_C
49 
#else
50 
# include "ide_modes.h"
51 
#endif /* CONFIG_BLK_DEV_QD65XX_MODULE */
52 
 
53 
#include "qd65xx.h"
54 
 
55 
/*
56 
 * I/O ports are 0x30-0x31 (and 0x32-0x33 for qd6580)
57 
 *            or 0xb0-0xb1 (and 0xb2-0xb3 for qd6580)
58 
 *      -- qd6500 is a single IDE interface
59 
 *      -- qd6580 is a dual IDE interface
60 
 *
61 
 * More research on qd6580 being done by willmore@cig.mot.com (David)
62 
 * More Information given by Petr Soucek (petr@ryston.cz)
63 
 * http://www.ryston.cz/petr/vlb
64 
 */
65 
 
66 
/*
67 
 * base: Timer1
68 
 *
69 
 *
70 
 * base+0x01: Config (R/O)
71 
 *
72 
 * bit 0: ide baseport: 1 = 0x1f0 ; 0 = 0x170 (only useful for qd6500)
73 
 * bit 1: qd65xx baseport: 1 = 0xb0 ; 0 = 0x30
74 
 * bit 2: ID3: bus speed: 1 = <=33MHz ; 0 = >33MHz
75 
 * bit 3: qd6500: 1 = disabled, 0 = enabled
76 
 *        qd6580: 1
77 
 * upper nibble:
78 
 *        qd6500: 1100
79 
 *        qd6580: either 1010 or 0101
80 
 *
81 
 *
82 
 * base+0x02: Timer2 (qd6580 only)
83 
 *
84 
 *
85 
 * base+0x03: Control (qd6580 only)
86 
 *
87 
 * bits 0-3 must always be set 1
88 
 * bit 4 must be set 1, but is set 0 by dos driver while measuring vlb clock
89 
 * bit 0 : 1 = Only primary port enabled : channel 0 for hda, channel 1 for hdb
90 
 *         0 = Primary and Secondary ports enabled : channel 0 for hda & hdb
91 
 *                                                   channel 1 for hdc & hdd
92 
 * bit 1 : 1 = only disks on primary port
93 
 *         0 = disks & ATAPI devices on primary port
94 
 * bit 2-4 : always 0
95 
 * bit 5 : status, but of what ?
96 
 * bit 6 : always set 1 by dos driver
97 
 * bit 7 : set 1 for non-ATAPI devices on primary port
98 
 *      (maybe read-ahead and post-write buffer ?)
99 
 */
100 
 
101 
static int timings[4]={-1,-1,-1,-1}; /* stores current timing for each timer */
102 
 
103 
static void qd_write_reg (u8 content, u8 reg)
104 
{
105 
        unsigned long flags;
106 
 
107 
        spin_lock_irqsave(&io_request_lock, flags);
108 
        outb(content,reg);
109 
        spin_unlock_irqrestore(&io_request_lock, flags);
110 
}
111 
 
112 
u8 __init qd_read_reg (u8 reg)
113 
{
114 
        unsigned long flags;
115 
        u8 read;
116 
 
117 
        spin_lock_irqsave(&io_request_lock, flags);
118 
        read = inb(reg);
119 
        spin_unlock_irqrestore(&io_request_lock, flags);
120 
        return read;
121 
}
122 
 
123 
/*
124 
 * qd_select:
125 
 *
126 
 * This routine is invoked from ide.c to prepare for access to a given drive.
127 
 */
128 
 
129 
static void qd_select (ide_drive_t *drive)
130 
{
131 
        u8 index = ((   (QD_TIMREG(drive)) & 0x80 ) >> 7) |
132 
                        (QD_TIMREG(drive) & 0x02);
133 
 
134 
        if (timings[index] != QD_TIMING(drive))
135 
                qd_write_reg(timings[index] = QD_TIMING(drive), QD_TIMREG(drive));
136 
}
137 
 
138 
/*
139 
 * qd6500_compute_timing
140 
 *
141 
 * computes the timing value where
142 
 *      lower nibble represents active time,   in count of VLB clocks
143 
 *      upper nibble represents recovery time, in count of VLB clocks
144 
 */
145 
 
146 
static u8 qd6500_compute_timing (ide_hwif_t *hwif, int active_time, int recovery_time)
147 
{
148 
        u8 active_cycle,recovery_cycle;
149 
 
150 
        if (system_bus_clock()<=33) {
151 
                active_cycle =   9  - IDE_IN(active_time   * system_bus_clock() / 1000 + 1, 2, 9);
152 
                recovery_cycle = 15 - IDE_IN(recovery_time * system_bus_clock() / 1000 + 1, 0, 15);
153 
        } else {
154 
                active_cycle =   8  - IDE_IN(active_time   * system_bus_clock() / 1000 + 1, 1, 8);
155 
                recovery_cycle = 18 - IDE_IN(recovery_time * system_bus_clock() / 1000 + 1, 3, 18);
156 
        }
157 
 
158 
        return((recovery_cycle<<4) | 0x08 | active_cycle);
159 
}
160 
 
161 
/*
162 
 * qd6580_compute_timing
163 
 *
164 
 * idem for qd6580
165 
 */
166 
 
167 
static u8 qd6580_compute_timing (int active_time, int recovery_time)
168 
{
169 
        u8 active_cycle   = 17 - IDE_IN(active_time   * system_bus_clock() / 1000 + 1, 2, 17);
170 
        u8 recovery_cycle = 15 - IDE_IN(recovery_time * system_bus_clock() / 1000 + 1, 2, 15);
171 
 
172 
        return((recovery_cycle<<4) | active_cycle);
173 
}
174 
 
175 
/*
176 
 * qd_find_disk_type
177 
 *
178 
 * tries to find timing from dos driver's table
179 
 */
180 
 
181 
static int qd_find_disk_type (ide_drive_t *drive,
182 
                int *active_time, int *recovery_time)
183 
{
184 
        struct qd65xx_timing_s *p;
185 
        char model[40];
186 
 
187 
        if (!*drive->id->model) return 0;
188 
 
189 
        strncpy(model,drive->id->model,40);
190 
        ide_fixstring(model,40,1); /* byte-swap */
191 
 
192 
        for (p = qd65xx_timing ; p->offset != -1 ; p++) {
193 
                if (!strncmp(p->model, model+p->offset, 4)) {
194 
                        printk(KERN_DEBUG "%s: listed !\n", drive->name);
195 
                        *active_time = p->active;
196 
                        *recovery_time = p->recovery;
197 
                        return 1;
198 
                }
199 
        }
200 
        return 0;
201 
}
202 
 
203 
/*
204 
 * qd_timing_ok:
205 
 *
206 
 * check whether timings don't conflict
207 
 */
208 
 
209 
static int qd_timing_ok (ide_drive_t drives[])
210 
{
211 
        return (IDE_IMPLY(drives[0].present && drives[1].present,
212 
                        IDE_IMPLY(QD_TIMREG(drives) == QD_TIMREG(drives+1),
213 
                                  QD_TIMING(drives) == QD_TIMING(drives+1))));
214 
        /* if same timing register, must be same timing */
215 
}
216 
 
217 
/*
218 
 * qd_set_timing:
219 
 *
220 
 * records the timing, and enables selectproc as needed
221 
 */
222 
 
223 
static void qd_set_timing (ide_drive_t *drive, u8 timing)
224 
{
225 
        ide_hwif_t *hwif = HWIF(drive);
226 
 
227 
        drive->drive_data &= 0xff00;
228 
        drive->drive_data |= timing;
229 
        if (qd_timing_ok(hwif->drives)) {
230 
                qd_select(drive); /* selects once */
231 
                hwif->selectproc = NULL;
232 
        } else
233 
                hwif->selectproc = &qd_select;
234 
 
235 
        printk(KERN_DEBUG "%s: %#x\n", drive->name, timing);
236 
}
237 
 
238 
/*
239 
 * qd6500_tune_drive
240 
 */
241 
 
242 
static void qd6500_tune_drive (ide_drive_t *drive, u8 pio)
243 
{
244 
        int active_time   = 175;
245 
        int recovery_time = 415; /* worst case values from the dos driver */
246 
 
247 
        if (drive->id && !qd_find_disk_type(drive, &active_time, &recovery_time)
248 
                && drive->id->tPIO && (drive->id->field_valid & 0x02)
249 
                && drive->id->eide_pio >= 240) {
250 
 
251 
                printk(KERN_INFO "%s: PIO mode%d\n", drive->name,
252 
                                drive->id->tPIO);
253 
                active_time = 110;
254 
                recovery_time = drive->id->eide_pio - 120;
255 
        }
256 
 
257 
        qd_set_timing(drive, qd6500_compute_timing(HWIF(drive), active_time, recovery_time));
258 
}
259 
 
260 
/*
261 
 * qd6580_tune_drive
262 
 */
263 
 
264 
static void qd6580_tune_drive (ide_drive_t *drive, u8 pio)
265 
{
266 
        ide_pio_data_t d;
267 
        int base = HWIF(drive)->select_data;
268 
        int active_time   = 175;
269 
        int recovery_time = 415; /* worst case values from the dos driver */
270 
 
271 
        if (drive->id && !qd_find_disk_type(drive, &active_time, &recovery_time)) {
272 
                pio = ide_get_best_pio_mode(drive, pio, 255, &d);
273 
                pio = IDE_MIN(pio,4);
274 
 
275 
                switch (pio) {
276 
                        case 0: break;
277 
                        case 3:
278 
                                if (d.cycle_time >= 110) {
279 
                                        active_time = 86;
280 
                                        recovery_time = d.cycle_time - 102;
281 
                                } else
282 
                                        printk(KERN_WARNING "%s: Strange recovery time !\n",drive->name);
283 
                                break;
284 
                        case 4:
285 
                                if (d.cycle_time >= 69) {
286 
                                        active_time = 70;
287 
                                        recovery_time = d.cycle_time - 61;
288 
                                } else
289 
                                        printk(KERN_WARNING "%s: Strange recovery time !\n",drive->name);
290 
                                break;
291 
                        default:
292 
                                if (d.cycle_time >= 180) {
293 
                                        active_time = 110;
294 
                                        recovery_time = d.cycle_time - 120;
295 
                                } else {
296 
                                        active_time = ide_pio_timings[pio].active_time;
297 
                                        recovery_time = d.cycle_time
298 
                                                        -active_time;
299 
                                }
300 
                }
301 
                printk(KERN_INFO "%s: PIO mode%d\n", drive->name,pio);
302 
        }
303 
 
304 
        if (!HWIF(drive)->channel && drive->media != ide_disk) {
305 
                qd_write_reg(0x5f, QD_CONTROL_PORT);
306 
                printk(KERN_WARNING "%s: ATAPI: disabled read-ahead FIFO "
307 
                        "and post-write buffer on %s.\n",
308 
                        drive->name, HWIF(drive)->name);
309 
        }
310 
 
311 
        qd_set_timing(drive, qd6580_compute_timing(active_time, recovery_time));
312 
}
313 
 
314 
/*
315 
 * qd_testreg
316 
 *
317 
 * tests if the given port is a register
318 
 */
319 
 
320 
static int __init qd_testreg(int port)
321 
{
322 
        u8 savereg;
323 
        u8 readreg;
324 
        unsigned long flags;
325 
 
326 
        spin_lock_irqsave(&io_request_lock, flags);
327 
        savereg = inb_p(port);
328 
        outb_p(QD_TESTVAL, port);       /* safe value */
329 
        readreg = inb_p(port);
330 
        outb(savereg, port);
331 
        spin_unlock_irqrestore(&io_request_lock, flags);
332 
 
333 
        if (savereg == QD_TESTVAL) {
334 
                printk(KERN_ERR "Outch ! the probe for qd65xx isn't reliable !\n");
335 
                printk(KERN_ERR "Please contact maintainers to tell about your hardware\n");
336 
                printk(KERN_ERR "Assuming qd65xx is not present.\n");
337 
                return 1;
338 
        }
339 
 
340 
        return (readreg != QD_TESTVAL);
341 
}
342 
 
343 
/*
344 
 * qd_setup:
345 
 *
346 
 * called to setup an ata channel : adjusts attributes & links for tuning
347 
 */
348 
 
349 
void __init qd_setup (int unit, int base, int config, unsigned int data0, unsigned int data1, void (*tuneproc) (ide_drive_t *, u8 pio))
350 
{
351 
        ide_hwif_t *hwif = &ide_hwifs[unit];
352 
 
353 
        hwif->chipset = ide_qd65xx;
354 
        hwif->channel = unit;
355 
        hwif->select_data = base;
356 
        hwif->config_data = config;
357 
        hwif->drives[0].drive_data = data0;
358 
        hwif->drives[1].drive_data = data1;
359 
        hwif->drives[0].io_32bit =
360 
        hwif->drives[1].io_32bit = 1;
361 
        hwif->tuneproc = tuneproc;
362 
#ifndef HWIF_PROBE_CLASSIC_METHOD
363 
        probe_hwif_init(hwif);
364 
#endif /* HWIF_PROBE_CLASSIC_METHOD */
365 
}
366 
 
367 
/*
368 
 * qd_unsetup:
369 
 *
370 
 * called to unsetup an ata channel : back to default values, unlinks tuning
371 
 */
372 
void __init qd_unsetup (int unit)
373 
{
374 
        ide_hwif_t *hwif = &ide_hwifs[unit];
375 
        u8 config = hwif->config_data;
376 
        int base = hwif->select_data;
377 
        void *tuneproc = (void *) hwif->tuneproc;
378 
 
379 
        if (!(hwif->chipset == ide_qd65xx)) return;
380 
 
381 
        printk(KERN_NOTICE "%s: back to defaults\n", hwif->name);
382 
 
383 
        hwif->selectproc = NULL;
384 
        hwif->tuneproc = NULL;
385 
 
386 
        if (tuneproc == (void *) qd6500_tune_drive) {
387 
                // will do it for both
388 
                qd_write_reg(QD6500_DEF_DATA, QD_TIMREG(&hwif->drives[0]));
389 
        } else if (tuneproc == (void *) qd6580_tune_drive) {
390 
                if (QD_CONTROL(hwif) & QD_CONTR_SEC_DISABLED) {
391 
                        qd_write_reg(QD6580_DEF_DATA, QD_TIMREG(&hwif->drives[0]));
392 
                        qd_write_reg(QD6580_DEF_DATA2, QD_TIMREG(&hwif->drives[1]));
393 
                } else {
394 
                        qd_write_reg(unit?QD6580_DEF_DATA2:QD6580_DEF_DATA, QD_TIMREG(&hwif->drives[0]));
395 
                }
396 
        } else {
397 
                printk(KERN_WARNING "Unknown qd65xx tuning fonction !\n");
398 
                printk(KERN_WARNING "keeping settings !\n");
399 
        }
400 
}
401 
 
402 
/*
403 
 * qd_probe:
404 
 *
405 
 * looks at the specified baseport, and if qd found, registers & initialises it
406 
 * return 1 if another qd may be probed
407 
 */
408 
 
409 
int __init qd_probe (int base)
410 
{
411 
        u8 config;
412 
        u8 unit;
413 
 
414 
        config = qd_read_reg(QD_CONFIG_PORT);
415 
 
416 
        if (! ((config & QD_CONFIG_BASEPORT) >> 1 == (base == 0xb0)) )
417 
                return 1;
418 
 
419 
        unit = ! (config & QD_CONFIG_IDE_BASEPORT);
420 
 
421 
        if ((config & 0xf0) == QD_CONFIG_QD6500) {
422 
 
423 
                if (qd_testreg(base)) return 1;         /* bad register */
424 
 
425 
                /* qd6500 found */
426 
 
427 
                printk(KERN_NOTICE "%s: qd6500 at %#x\n",
428 
                        ide_hwifs[unit].name, base);
429 
 
430 
                printk(KERN_DEBUG "qd6500: config=%#x, ID3=%u\n",
431 
                        config, QD_ID3);
432 
 
433 
                if (config & QD_CONFIG_DISABLED) {
434 
                        printk(KERN_WARNING "qd6500 is disabled !\n");
435 
                        return 1;
436 
                }
437 
 
438 
                qd_setup(unit, base, config, QD6500_DEF_DATA,
439 
                        QD6500_DEF_DATA, &qd6500_tune_drive);
440 
                return 1;
441 
        }
442 
 
443 
        if (((config & 0xf0) == QD_CONFIG_QD6580_A) ||
444 
            ((config & 0xf0) == QD_CONFIG_QD6580_B)) {
445 
 
446 
                u8 control;
447 
 
448 
                if (qd_testreg(base) || qd_testreg(base+0x02)) return 1;
449 
                        /* bad registers */
450 
 
451 
                /* qd6580 found */
452 
 
453 
                control = qd_read_reg(QD_CONTROL_PORT);
454 
 
455 
                printk(KERN_NOTICE "qd6580 at %#x\n", base);
456 
                printk(KERN_DEBUG "qd6580: config=%#x, control=%#x, ID3=%u\n",
457 
                        config, control, QD_ID3);
458 
 
459 
                if (control & QD_CONTR_SEC_DISABLED) {
460 
                        /* secondary disabled */
461 
                        printk(KERN_INFO "%s: qd6580: single IDE board\n",
462 
                                        ide_hwifs[unit].name);
463 
                        qd_setup(unit, base, config | (control << 8),
464 
                                QD6580_DEF_DATA, QD6580_DEF_DATA2,
465 
                                &qd6580_tune_drive);
466 
                        qd_write_reg(QD_DEF_CONTR,QD_CONTROL_PORT);
467 
 
468 
                        return 1;
469 
                } else {
470 
                        /* secondary enabled */
471 
                        printk(KERN_INFO "%s&%s: qd6580: dual IDE board\n",
472 
                                        ide_hwifs[0].name,ide_hwifs[1].name);
473 
 
474 
                        qd_setup(0, base, config | (control << 8),
475 
                                QD6580_DEF_DATA, QD6580_DEF_DATA,
476 
                                &qd6580_tune_drive);
477 
                        qd_setup(1, base, config | (control << 8),
478 
                                QD6580_DEF_DATA2, QD6580_DEF_DATA2,
479 
                                &qd6580_tune_drive);
480 
                        qd_write_reg(QD_DEF_CONTR,QD_CONTROL_PORT);
481 
 
482 
                        return 0; /* no other qd65xx possible */
483 
                }
484 
        }
485 
        /* no qd65xx found */
486 
        return 1;
487 
}
488 
 
489 
#ifndef MODULE
490 
/*
491 
 * init_qd65xx:
492 
 *
493 
 * called by ide.c when parsing command line
494 
 */
495 
 
496 
void __init init_qd65xx (void)
497 
{
498 
        if (qd_probe(0x30)) qd_probe(0xb0);
499 
}
500 
 
501 
#else
502 
 
503 
MODULE_AUTHOR("Samuel Thibault");
504 
MODULE_DESCRIPTION("support of qd65xx vlb ide chipset");
505 
MODULE_LICENSE("GPL");
506 
 
507 
int __init qd65xx_mod_init(void)
508 
{
509 
        if (qd_probe(0x30)) qd_probe(0xb0);
510 
        if (ide_hwifs[0].chipset != ide_qd65xx &&
511 
            ide_hwifs[1].chipset != ide_qd65xx)
512 
                return -ENODEV;
513 
        return 0;
514 
}
515 
module_init(qd65xx_mod_init);
516 
 
517 
void __init qd65xx_mod_exit(void)
518 
{
519 
        qd_unsetup(0);
520 
        qd_unsetup(1);
521 
}
522 
module_exit(qd65xx_mod_exit);
523 
#endif

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