2 * linux/drivers/ide/legacy/qd65xx.c Version 0.07 Sep 30, 2001
4 * Copyright (C) 1996-2001 Linus Torvalds & author (see below)
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
14 * QDI QD6500/QD6580 EIDE controller fast support
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 "hda=autotune hdb=autotune"
20 * To enable 2nd channel tuning (qd6580 only), use "hdc=autotune hdd=autotune"
24 * Rewritten from the work of Colten Edwards <pje120@cs.usask.ca> by
25 * Samuel Thibault <samuel.thibault@fnac.net>
28 #include <linux/module.h>
29 #include <linux/types.h>
30 #include <linux/kernel.h>
31 #include <linux/delay.h>
32 #include <linux/timer.h>
34 #include <linux/ioport.h>
35 #include <linux/blkdev.h>
36 #include <linux/hdreg.h>
37 #include <linux/ide.h>
38 #include <linux/init.h>
39 #include <asm/system.h>
45 * I/O ports are 0x30-0x31 (and 0x32-0x33 for qd6580)
46 * or 0xb0-0xb1 (and 0xb2-0xb3 for qd6580)
47 * -- qd6500 is a single IDE interface
48 * -- qd6580 is a dual IDE interface
50 * More research on qd6580 being done by willmore@cig.mot.com (David)
51 * More Information given by Petr Soucek (petr@ryston.cz)
52 * http://www.ryston.cz/petr/vlb
59 * base+0x01: Config (R/O)
61 * bit 0: ide baseport: 1 = 0x1f0 ; 0 = 0x170 (only useful for qd6500)
62 * bit 1: qd65xx baseport: 1 = 0xb0 ; 0 = 0x30
63 * bit 2: ID3: bus speed: 1 = <=33MHz ; 0 = >33MHz
64 * bit 3: qd6500: 1 = disabled, 0 = enabled
68 * qd6580: either 1010 or 0101
71 * base+0x02: Timer2 (qd6580 only)
74 * base+0x03: Control (qd6580 only)
76 * bits 0-3 must always be set 1
77 * bit 4 must be set 1, but is set 0 by dos driver while measuring vlb clock
78 * bit 0 : 1 = Only primary port enabled : channel 0 for hda, channel 1 for hdb
79 * 0 = Primary and Secondary ports enabled : channel 0 for hda & hdb
80 * channel 1 for hdc & hdd
81 * bit 1 : 1 = only disks on primary port
82 * 0 = disks & ATAPI devices on primary port
84 * bit 5 : status, but of what ?
85 * bit 6 : always set 1 by dos driver
86 * bit 7 : set 1 for non-ATAPI devices on primary port
87 * (maybe read-ahead and post-write buffer ?)
90 static int timings[4]={-1,-1,-1,-1}; /* stores current timing for each timer */
95 * This routine is invoked from ide.c to prepare for access to a given drive.
98 static void qd_select (ide_drive_t *drive)
100 u8 index = (( (QD_TIMREG(drive)) & 0x80 ) >> 7) |
101 (QD_TIMREG(drive) & 0x02);
103 if (timings[index] != QD_TIMING(drive))
104 outb(timings[index] = QD_TIMING(drive), QD_TIMREG(drive));
108 * qd6500_compute_timing
110 * computes the timing value where
111 * lower nibble represents active time, in count of VLB clocks
112 * upper nibble represents recovery time, in count of VLB clocks
115 static u8 qd6500_compute_timing (ide_hwif_t *hwif, int active_time, int recovery_time)
117 u8 active_cycle,recovery_cycle;
119 if (system_bus_clock()<=33) {
120 active_cycle = 9 - IDE_IN(active_time * system_bus_clock() / 1000 + 1, 2, 9);
121 recovery_cycle = 15 - IDE_IN(recovery_time * system_bus_clock() / 1000 + 1, 0, 15);
123 active_cycle = 8 - IDE_IN(active_time * system_bus_clock() / 1000 + 1, 1, 8);
124 recovery_cycle = 18 - IDE_IN(recovery_time * system_bus_clock() / 1000 + 1, 3, 18);
127 return((recovery_cycle<<4) | 0x08 | active_cycle);
131 * qd6580_compute_timing
136 static u8 qd6580_compute_timing (int active_time, int recovery_time)
138 u8 active_cycle = 17 - IDE_IN(active_time * system_bus_clock() / 1000 + 1, 2, 17);
139 u8 recovery_cycle = 15 - IDE_IN(recovery_time * system_bus_clock() / 1000 + 1, 2, 15);
141 return((recovery_cycle<<4) | active_cycle);
147 * tries to find timing from dos driver's table
150 static int qd_find_disk_type (ide_drive_t *drive,
151 int *active_time, int *recovery_time)
153 struct qd65xx_timing_s *p;
156 if (!*drive->id->model) return 0;
158 strncpy(model,drive->id->model,40);
159 ide_fixstring(model,40,1); /* byte-swap */
161 for (p = qd65xx_timing ; p->offset != -1 ; p++) {
162 if (!strncmp(p->model, model+p->offset, 4)) {
163 printk(KERN_DEBUG "%s: listed !\n", drive->name);
164 *active_time = p->active;
165 *recovery_time = p->recovery;
175 * check whether timings don't conflict
178 static int qd_timing_ok (ide_drive_t drives[])
180 return (IDE_IMPLY(drives[0].present && drives[1].present,
181 IDE_IMPLY(QD_TIMREG(drives) == QD_TIMREG(drives+1),
182 QD_TIMING(drives) == QD_TIMING(drives+1))));
183 /* if same timing register, must be same timing */
189 * records the timing, and enables selectproc as needed
192 static void qd_set_timing (ide_drive_t *drive, u8 timing)
194 ide_hwif_t *hwif = HWIF(drive);
196 drive->drive_data &= 0xff00;
197 drive->drive_data |= timing;
198 if (qd_timing_ok(hwif->drives)) {
199 qd_select(drive); /* selects once */
200 hwif->selectproc = NULL;
202 hwif->selectproc = &qd_select;
204 printk(KERN_DEBUG "%s: %#x\n", drive->name, timing);
207 static void qd6500_set_pio_mode(ide_drive_t *drive, const u8 pio)
209 int active_time = 175;
210 int recovery_time = 415; /* worst case values from the dos driver */
213 * FIXME: use "pio" value
215 if (drive->id && !qd_find_disk_type(drive, &active_time, &recovery_time)
216 && drive->id->tPIO && (drive->id->field_valid & 0x02)
217 && drive->id->eide_pio >= 240) {
219 printk(KERN_INFO "%s: PIO mode%d\n", drive->name,
222 recovery_time = drive->id->eide_pio - 120;
225 qd_set_timing(drive, qd6500_compute_timing(HWIF(drive), active_time, recovery_time));
228 static void qd6580_set_pio_mode(ide_drive_t *drive, const u8 pio)
230 int base = HWIF(drive)->select_data;
231 unsigned int cycle_time;
232 int active_time = 175;
233 int recovery_time = 415; /* worst case values from the dos driver */
235 if (drive->id && !qd_find_disk_type(drive, &active_time, &recovery_time)) {
236 cycle_time = ide_pio_cycle_time(drive, pio);
241 if (cycle_time >= 110) {
243 recovery_time = cycle_time - 102;
245 printk(KERN_WARNING "%s: Strange recovery time !\n",drive->name);
248 if (cycle_time >= 69) {
250 recovery_time = cycle_time - 61;
252 printk(KERN_WARNING "%s: Strange recovery time !\n",drive->name);
255 if (cycle_time >= 180) {
257 recovery_time = cycle_time - 120;
259 active_time = ide_pio_timings[pio].active_time;
260 recovery_time = cycle_time - active_time;
263 printk(KERN_INFO "%s: PIO mode%d\n", drive->name,pio);
266 if (!HWIF(drive)->channel && drive->media != ide_disk) {
267 outb(0x5f, QD_CONTROL_PORT);
268 printk(KERN_WARNING "%s: ATAPI: disabled read-ahead FIFO "
269 "and post-write buffer on %s.\n",
270 drive->name, HWIF(drive)->name);
273 qd_set_timing(drive, qd6580_compute_timing(active_time, recovery_time));
279 * tests if the given port is a register
282 static int __init qd_testreg(int port)
287 local_irq_save(flags);
288 savereg = inb_p(port);
289 outb_p(QD_TESTVAL, port); /* safe value */
290 readreg = inb_p(port);
292 local_irq_restore(flags);
294 if (savereg == QD_TESTVAL) {
295 printk(KERN_ERR "Outch ! the probe for qd65xx isn't reliable !\n");
296 printk(KERN_ERR "Please contact maintainers to tell about your hardware\n");
297 printk(KERN_ERR "Assuming qd65xx is not present.\n");
301 return (readreg != QD_TESTVAL);
307 * called to setup an ata channel : adjusts attributes & links for tuning
310 static void __init qd_setup(ide_hwif_t *hwif, int base, int config,
311 unsigned int data0, unsigned int data1)
313 hwif->chipset = ide_qd65xx;
314 hwif->channel = hwif->index;
315 hwif->select_data = base;
316 hwif->config_data = config;
317 hwif->drives[0].drive_data = data0;
318 hwif->drives[1].drive_data = data1;
319 hwif->drives[0].io_32bit =
320 hwif->drives[1].io_32bit = 1;
321 hwif->pio_mask = ATA_PIO4;
327 * called to unsetup an ata channel : back to default values, unlinks tuning
330 static void __exit qd_unsetup(ide_hwif_t *hwif)
332 u8 config = hwif->config_data;
333 int base = hwif->select_data;
334 void *set_pio_mode = (void *)hwif->set_pio_mode;
336 if (hwif->chipset != ide_qd65xx)
339 printk(KERN_NOTICE "%s: back to defaults\n", hwif->name);
341 hwif->selectproc = NULL;
342 hwif->set_pio_mode = NULL;
344 if (set_pio_mode == (void *)qd6500_set_pio_mode) {
345 // will do it for both
346 outb(QD6500_DEF_DATA, QD_TIMREG(&hwif->drives[0]));
347 } else if (set_pio_mode == (void *)qd6580_set_pio_mode) {
348 if (QD_CONTROL(hwif) & QD_CONTR_SEC_DISABLED) {
349 outb(QD6580_DEF_DATA, QD_TIMREG(&hwif->drives[0]));
350 outb(QD6580_DEF_DATA2, QD_TIMREG(&hwif->drives[1]));
352 outb(hwif->channel ? QD6580_DEF_DATA2 : QD6580_DEF_DATA, QD_TIMREG(&hwif->drives[0]));
355 printk(KERN_WARNING "Unknown qd65xx tuning fonction !\n");
356 printk(KERN_WARNING "keeping settings !\n");
364 * looks at the specified baseport, and if qd found, registers & initialises it
365 * return 1 if another qd may be probed
368 static int __init qd_probe(int base)
371 u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
375 config = inb(QD_CONFIG_PORT);
377 if (! ((config & QD_CONFIG_BASEPORT) >> 1 == (base == 0xb0)) )
380 unit = ! (config & QD_CONFIG_IDE_BASEPORT);
382 if ((config & 0xf0) == QD_CONFIG_QD6500) {
384 if (qd_testreg(base)) return 1; /* bad register */
388 hwif = &ide_hwifs[unit];
389 printk(KERN_NOTICE "%s: qd6500 at %#x\n", hwif->name, base);
390 printk(KERN_DEBUG "qd6500: config=%#x, ID3=%u\n",
393 if (config & QD_CONFIG_DISABLED) {
394 printk(KERN_WARNING "qd6500 is disabled !\n");
398 qd_setup(hwif, base, config, QD6500_DEF_DATA, QD6500_DEF_DATA);
400 hwif->set_pio_mode = &qd6500_set_pio_mode;
409 if (((config & 0xf0) == QD_CONFIG_QD6580_A) ||
410 ((config & 0xf0) == QD_CONFIG_QD6580_B)) {
414 if (qd_testreg(base) || qd_testreg(base+0x02)) return 1;
419 control = inb(QD_CONTROL_PORT);
421 printk(KERN_NOTICE "qd6580 at %#x\n", base);
422 printk(KERN_DEBUG "qd6580: config=%#x, control=%#x, ID3=%u\n",
423 config, control, QD_ID3);
425 if (control & QD_CONTR_SEC_DISABLED) {
426 /* secondary disabled */
428 hwif = &ide_hwifs[unit];
429 printk(KERN_INFO "%s: qd6580: single IDE board\n",
431 qd_setup(hwif, base, config | (control << 8),
432 QD6580_DEF_DATA, QD6580_DEF_DATA2);
434 hwif->set_pio_mode = &qd6580_set_pio_mode;
440 outb(QD_DEF_CONTR, QD_CONTROL_PORT);
446 hwif = &ide_hwifs[0];
447 mate = &ide_hwifs[1];
448 /* secondary enabled */
449 printk(KERN_INFO "%s&%s: qd6580: dual IDE board\n",
450 hwif->name, mate->name);
452 qd_setup(hwif, base, config | (control << 8),
453 QD6580_DEF_DATA, QD6580_DEF_DATA);
455 hwif->set_pio_mode = &qd6580_set_pio_mode;
457 qd_setup(mate, base, config | (control << 8),
458 QD6580_DEF_DATA2, QD6580_DEF_DATA2);
460 mate->set_pio_mode = &qd6580_set_pio_mode;
467 outb(QD_DEF_CONTR, QD_CONTROL_PORT);
469 return 0; /* no other qd65xx possible */
472 /* no qd65xx found */
476 int probe_qd65xx = 0;
478 module_param_named(probe, probe_qd65xx, bool, 0);
479 MODULE_PARM_DESC(probe, "probe for QD65xx chipsets");
481 /* Can be called directly from ide.c. */
482 int __init qd65xx_init(void)
484 if (probe_qd65xx == 0)
489 if (ide_hwifs[0].chipset != ide_qd65xx &&
490 ide_hwifs[1].chipset != ide_qd65xx)
496 module_init(qd65xx_init);
499 MODULE_AUTHOR("Samuel Thibault");
500 MODULE_DESCRIPTION("support of qd65xx vlb ide chipset");
501 MODULE_LICENSE("GPL");