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 "ide0=autotune"
20 * To enable second channel tuning (qd6580 only), use "ide1=autotune"
24 * Rewritten from the work of Colten Edwards <pje120@cs.usask.ca> by
25 * Samuel Thibault <samuel.thibault@fnac.net>
28 #undef REALLY_SLOW_IO /* most systems can safely undef this */
30 #include <linux/module.h>
31 #include <linux/types.h>
32 #include <linux/kernel.h>
33 #include <linux/delay.h>
34 #include <linux/timer.h>
36 #include <linux/ioport.h>
37 #include <linux/blkdev.h>
38 #include <linux/hdreg.h>
39 #include <linux/ide.h>
40 #include <linux/init.h>
41 #include <asm/system.h>
47 * I/O ports are 0x30-0x31 (and 0x32-0x33 for qd6580)
48 * or 0xb0-0xb1 (and 0xb2-0xb3 for qd6580)
49 * -- qd6500 is a single IDE interface
50 * -- qd6580 is a dual IDE interface
52 * More research on qd6580 being done by willmore@cig.mot.com (David)
53 * More Information given by Petr Soucek (petr@ryston.cz)
54 * http://www.ryston.cz/petr/vlb
61 * base+0x01: Config (R/O)
63 * bit 0: ide baseport: 1 = 0x1f0 ; 0 = 0x170 (only useful for qd6500)
64 * bit 1: qd65xx baseport: 1 = 0xb0 ; 0 = 0x30
65 * bit 2: ID3: bus speed: 1 = <=33MHz ; 0 = >33MHz
66 * bit 3: qd6500: 1 = disabled, 0 = enabled
70 * qd6580: either 1010 or 0101
73 * base+0x02: Timer2 (qd6580 only)
76 * base+0x03: Control (qd6580 only)
78 * bits 0-3 must always be set 1
79 * bit 4 must be set 1, but is set 0 by dos driver while measuring vlb clock
80 * bit 0 : 1 = Only primary port enabled : channel 0 for hda, channel 1 for hdb
81 * 0 = Primary and Secondary ports enabled : channel 0 for hda & hdb
82 * channel 1 for hdc & hdd
83 * bit 1 : 1 = only disks on primary port
84 * 0 = disks & ATAPI devices on primary port
86 * bit 5 : status, but of what ?
87 * bit 6 : always set 1 by dos driver
88 * bit 7 : set 1 for non-ATAPI devices on primary port
89 * (maybe read-ahead and post-write buffer ?)
92 static int timings[4]={-1,-1,-1,-1}; /* stores current timing for each timer */
94 static void qd_write_reg (u8 content, unsigned long reg)
98 spin_lock_irqsave(&ide_lock, flags);
100 spin_unlock_irqrestore(&ide_lock, flags);
103 static u8 __init qd_read_reg (unsigned long reg)
108 spin_lock_irqsave(&ide_lock, flags);
110 spin_unlock_irqrestore(&ide_lock, flags);
117 * This routine is invoked from ide.c to prepare for access to a given drive.
120 static void qd_select (ide_drive_t *drive)
122 u8 index = (( (QD_TIMREG(drive)) & 0x80 ) >> 7) |
123 (QD_TIMREG(drive) & 0x02);
125 if (timings[index] != QD_TIMING(drive))
126 qd_write_reg(timings[index] = QD_TIMING(drive), QD_TIMREG(drive));
130 * qd6500_compute_timing
132 * computes the timing value where
133 * lower nibble represents active time, in count of VLB clocks
134 * upper nibble represents recovery time, in count of VLB clocks
137 static u8 qd6500_compute_timing (ide_hwif_t *hwif, int active_time, int recovery_time)
139 u8 active_cycle,recovery_cycle;
141 if (system_bus_clock()<=33) {
142 active_cycle = 9 - IDE_IN(active_time * system_bus_clock() / 1000 + 1, 2, 9);
143 recovery_cycle = 15 - IDE_IN(recovery_time * system_bus_clock() / 1000 + 1, 0, 15);
145 active_cycle = 8 - IDE_IN(active_time * system_bus_clock() / 1000 + 1, 1, 8);
146 recovery_cycle = 18 - IDE_IN(recovery_time * system_bus_clock() / 1000 + 1, 3, 18);
149 return((recovery_cycle<<4) | 0x08 | active_cycle);
153 * qd6580_compute_timing
158 static u8 qd6580_compute_timing (int active_time, int recovery_time)
160 u8 active_cycle = 17 - IDE_IN(active_time * system_bus_clock() / 1000 + 1, 2, 17);
161 u8 recovery_cycle = 15 - IDE_IN(recovery_time * system_bus_clock() / 1000 + 1, 2, 15);
163 return((recovery_cycle<<4) | active_cycle);
169 * tries to find timing from dos driver's table
172 static int qd_find_disk_type (ide_drive_t *drive,
173 int *active_time, int *recovery_time)
175 struct qd65xx_timing_s *p;
178 if (!*drive->id->model) return 0;
180 strncpy(model,drive->id->model,40);
181 ide_fixstring(model,40,1); /* byte-swap */
183 for (p = qd65xx_timing ; p->offset != -1 ; p++) {
184 if (!strncmp(p->model, model+p->offset, 4)) {
185 printk(KERN_DEBUG "%s: listed !\n", drive->name);
186 *active_time = p->active;
187 *recovery_time = p->recovery;
197 * check whether timings don't conflict
200 static int qd_timing_ok (ide_drive_t drives[])
202 return (IDE_IMPLY(drives[0].present && drives[1].present,
203 IDE_IMPLY(QD_TIMREG(drives) == QD_TIMREG(drives+1),
204 QD_TIMING(drives) == QD_TIMING(drives+1))));
205 /* if same timing register, must be same timing */
211 * records the timing, and enables selectproc as needed
214 static void qd_set_timing (ide_drive_t *drive, u8 timing)
216 ide_hwif_t *hwif = HWIF(drive);
218 drive->drive_data &= 0xff00;
219 drive->drive_data |= timing;
220 if (qd_timing_ok(hwif->drives)) {
221 qd_select(drive); /* selects once */
222 hwif->selectproc = NULL;
224 hwif->selectproc = &qd_select;
226 printk(KERN_DEBUG "%s: %#x\n", drive->name, timing);
233 static void qd6500_tune_drive (ide_drive_t *drive, u8 pio)
235 int active_time = 175;
236 int recovery_time = 415; /* worst case values from the dos driver */
238 if (drive->id && !qd_find_disk_type(drive, &active_time, &recovery_time)
239 && drive->id->tPIO && (drive->id->field_valid & 0x02)
240 && drive->id->eide_pio >= 240) {
242 printk(KERN_INFO "%s: PIO mode%d\n", drive->name,
245 recovery_time = drive->id->eide_pio - 120;
248 qd_set_timing(drive, qd6500_compute_timing(HWIF(drive), active_time, recovery_time));
255 static void qd6580_tune_drive (ide_drive_t *drive, u8 pio)
258 int base = HWIF(drive)->select_data;
259 int active_time = 175;
260 int recovery_time = 415; /* worst case values from the dos driver */
262 if (drive->id && !qd_find_disk_type(drive, &active_time, &recovery_time)) {
263 pio = ide_get_best_pio_mode(drive, pio, 255, &d);
264 pio = min_t(u8, pio, 4);
269 if (d.cycle_time >= 110) {
271 recovery_time = d.cycle_time - 102;
273 printk(KERN_WARNING "%s: Strange recovery time !\n",drive->name);
276 if (d.cycle_time >= 69) {
278 recovery_time = d.cycle_time - 61;
280 printk(KERN_WARNING "%s: Strange recovery time !\n",drive->name);
283 if (d.cycle_time >= 180) {
285 recovery_time = d.cycle_time - 120;
287 active_time = ide_pio_timings[pio].active_time;
288 recovery_time = d.cycle_time
292 printk(KERN_INFO "%s: PIO mode%d\n", drive->name,pio);
295 if (!HWIF(drive)->channel && drive->media != ide_disk) {
296 qd_write_reg(0x5f, QD_CONTROL_PORT);
297 printk(KERN_WARNING "%s: ATAPI: disabled read-ahead FIFO "
298 "and post-write buffer on %s.\n",
299 drive->name, HWIF(drive)->name);
302 qd_set_timing(drive, qd6580_compute_timing(active_time, recovery_time));
308 * tests if the given port is a register
311 static int __init qd_testreg(int port)
317 spin_lock_irqsave(&ide_lock, flags);
318 savereg = inb_p(port);
319 outb_p(QD_TESTVAL, port); /* safe value */
320 readreg = inb_p(port);
322 spin_unlock_irqrestore(&ide_lock, flags);
324 if (savereg == QD_TESTVAL) {
325 printk(KERN_ERR "Outch ! the probe for qd65xx isn't reliable !\n");
326 printk(KERN_ERR "Please contact maintainers to tell about your hardware\n");
327 printk(KERN_ERR "Assuming qd65xx is not present.\n");
331 return (readreg != QD_TESTVAL);
337 * called to setup an ata channel : adjusts attributes & links for tuning
340 static void __init qd_setup(ide_hwif_t *hwif, int base, int config,
341 unsigned int data0, unsigned int data1,
342 void (*tuneproc) (ide_drive_t *, u8 pio))
344 hwif->chipset = ide_qd65xx;
345 hwif->channel = hwif->index;
346 hwif->select_data = base;
347 hwif->config_data = config;
348 hwif->drives[0].drive_data = data0;
349 hwif->drives[1].drive_data = data1;
350 hwif->drives[0].io_32bit =
351 hwif->drives[1].io_32bit = 1;
352 hwif->tuneproc = tuneproc;
353 probe_hwif_init(hwif);
359 * called to unsetup an ata channel : back to default values, unlinks tuning
362 static void __exit qd_unsetup(ide_hwif_t *hwif)
364 u8 config = hwif->config_data;
365 int base = hwif->select_data;
366 void *tuneproc = (void *) hwif->tuneproc;
368 if (hwif->chipset != ide_qd65xx)
371 printk(KERN_NOTICE "%s: back to defaults\n", hwif->name);
373 hwif->selectproc = NULL;
374 hwif->tuneproc = NULL;
376 if (tuneproc == (void *) qd6500_tune_drive) {
377 // will do it for both
378 qd_write_reg(QD6500_DEF_DATA, QD_TIMREG(&hwif->drives[0]));
379 } else if (tuneproc == (void *) qd6580_tune_drive) {
380 if (QD_CONTROL(hwif) & QD_CONTR_SEC_DISABLED) {
381 qd_write_reg(QD6580_DEF_DATA, QD_TIMREG(&hwif->drives[0]));
382 qd_write_reg(QD6580_DEF_DATA2, QD_TIMREG(&hwif->drives[1]));
384 qd_write_reg(hwif->channel ? QD6580_DEF_DATA2 : QD6580_DEF_DATA, QD_TIMREG(&hwif->drives[0]));
387 printk(KERN_WARNING "Unknown qd65xx tuning fonction !\n");
388 printk(KERN_WARNING "keeping settings !\n");
396 * looks at the specified baseport, and if qd found, registers & initialises it
397 * return 1 if another qd may be probed
400 static int __init qd_probe(int base)
406 config = qd_read_reg(QD_CONFIG_PORT);
408 if (! ((config & QD_CONFIG_BASEPORT) >> 1 == (base == 0xb0)) )
411 unit = ! (config & QD_CONFIG_IDE_BASEPORT);
413 if ((config & 0xf0) == QD_CONFIG_QD6500) {
415 if (qd_testreg(base)) return 1; /* bad register */
419 hwif = &ide_hwifs[unit];
420 printk(KERN_NOTICE "%s: qd6500 at %#x\n", hwif->name, base);
421 printk(KERN_DEBUG "qd6500: config=%#x, ID3=%u\n",
424 if (config & QD_CONFIG_DISABLED) {
425 printk(KERN_WARNING "qd6500 is disabled !\n");
429 qd_setup(hwif, base, config, QD6500_DEF_DATA, QD6500_DEF_DATA,
432 create_proc_ide_interfaces();
437 if (((config & 0xf0) == QD_CONFIG_QD6580_A) ||
438 ((config & 0xf0) == QD_CONFIG_QD6580_B)) {
442 if (qd_testreg(base) || qd_testreg(base+0x02)) return 1;
447 control = qd_read_reg(QD_CONTROL_PORT);
449 printk(KERN_NOTICE "qd6580 at %#x\n", base);
450 printk(KERN_DEBUG "qd6580: config=%#x, control=%#x, ID3=%u\n",
451 config, control, QD_ID3);
453 if (control & QD_CONTR_SEC_DISABLED) {
454 /* secondary disabled */
456 hwif = &ide_hwifs[unit];
457 printk(KERN_INFO "%s: qd6580: single IDE board\n",
459 qd_setup(hwif, base, config | (control << 8),
460 QD6580_DEF_DATA, QD6580_DEF_DATA2,
462 qd_write_reg(QD_DEF_CONTR,QD_CONTROL_PORT);
464 create_proc_ide_interfaces();
470 hwif = &ide_hwifs[0];
471 mate = &ide_hwifs[1];
472 /* secondary enabled */
473 printk(KERN_INFO "%s&%s: qd6580: dual IDE board\n",
474 hwif->name, mate->name);
476 qd_setup(hwif, base, config | (control << 8),
477 QD6580_DEF_DATA, QD6580_DEF_DATA,
479 qd_setup(mate, base, config | (control << 8),
480 QD6580_DEF_DATA2, QD6580_DEF_DATA2,
482 qd_write_reg(QD_DEF_CONTR,QD_CONTROL_PORT);
484 create_proc_ide_interfaces();
486 return 0; /* no other qd65xx possible */
489 /* no qd65xx found */
493 /* Can be called directly from ide.c. */
494 int __init qd65xx_init(void)
498 if (ide_hwifs[0].chipset != ide_qd65xx &&
499 ide_hwifs[1].chipset != ide_qd65xx)
505 module_init(qd65xx_init);
508 MODULE_AUTHOR("Samuel Thibault");
509 MODULE_DESCRIPTION("support of qd65xx vlb ide chipset");
510 MODULE_LICENSE("GPL");