2 * Copyright (C) 1996-2001 Linus Torvalds & author (see below)
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
12 * QDI QD6500/QD6580 EIDE controller fast support
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"
17 * To enable tuning, use "hda=autotune hdb=autotune"
18 * To enable 2nd channel tuning (qd6580 only), use "hdc=autotune hdd=autotune"
22 * Rewritten from the work of Colten Edwards <pje120@cs.usask.ca> by
23 * Samuel Thibault <samuel.thibault@fnac.net>
26 #include <linux/module.h>
27 #include <linux/types.h>
28 #include <linux/kernel.h>
29 #include <linux/delay.h>
30 #include <linux/timer.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>
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
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
57 * base+0x01: Config (R/O)
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
66 * qd6580: either 1010 or 0101
69 * base+0x02: Timer2 (qd6580 only)
72 * base+0x03: Control (qd6580 only)
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
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 ?)
88 static int timings[4]={-1,-1,-1,-1}; /* stores current timing for each timer */
93 * This routine is invoked to prepare for access to a given drive.
96 static void qd65xx_select(ide_drive_t *drive)
98 u8 index = (( (QD_TIMREG(drive)) & 0x80 ) >> 7) |
99 (QD_TIMREG(drive) & 0x02);
101 if (timings[index] != QD_TIMING(drive))
102 outb(timings[index] = QD_TIMING(drive), QD_TIMREG(drive));
106 * qd6500_compute_timing
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
113 static u8 qd6500_compute_timing (ide_hwif_t *hwif, int active_time, int recovery_time)
115 u8 active_cycle,recovery_cycle;
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);
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);
125 return((recovery_cycle<<4) | 0x08 | active_cycle);
129 * qd6580_compute_timing
134 static u8 qd6580_compute_timing (int active_time, int recovery_time)
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);
139 return((recovery_cycle<<4) | active_cycle);
145 * tries to find timing from dos driver's table
148 static int qd_find_disk_type (ide_drive_t *drive,
149 int *active_time, int *recovery_time)
151 struct qd65xx_timing_s *p;
154 if (!*drive->id->model) return 0;
156 strncpy(model,drive->id->model,40);
157 ide_fixstring(model,40,1); /* byte-swap */
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;
176 static void qd_set_timing (ide_drive_t *drive, u8 timing)
178 drive->drive_data &= 0xff00;
179 drive->drive_data |= timing;
181 printk(KERN_DEBUG "%s: %#x\n", drive->name, timing);
184 static void qd6500_set_pio_mode(ide_drive_t *drive, const u8 pio)
186 int active_time = 175;
187 int recovery_time = 415; /* worst case values from the dos driver */
190 * FIXME: use "pio" value
192 if (drive->id && !qd_find_disk_type(drive, &active_time, &recovery_time)
193 && drive->id->tPIO && (drive->id->field_valid & 0x02)
194 && drive->id->eide_pio >= 240) {
196 printk(KERN_INFO "%s: PIO mode%d\n", drive->name,
199 recovery_time = drive->id->eide_pio - 120;
202 qd_set_timing(drive, qd6500_compute_timing(HWIF(drive), active_time, recovery_time));
205 static void qd6580_set_pio_mode(ide_drive_t *drive, const u8 pio)
207 ide_hwif_t *hwif = drive->hwif;
208 unsigned int cycle_time;
209 int active_time = 175;
210 int recovery_time = 415; /* worst case values from the dos driver */
211 u8 base = (hwif->config_data & 0xff00) >> 8;
213 if (drive->id && !qd_find_disk_type(drive, &active_time, &recovery_time)) {
214 cycle_time = ide_pio_cycle_time(drive, pio);
219 if (cycle_time >= 110) {
221 recovery_time = cycle_time - 102;
223 printk(KERN_WARNING "%s: Strange recovery time !\n",drive->name);
226 if (cycle_time >= 69) {
228 recovery_time = cycle_time - 61;
230 printk(KERN_WARNING "%s: Strange recovery time !\n",drive->name);
233 if (cycle_time >= 180) {
235 recovery_time = cycle_time - 120;
237 active_time = ide_pio_timings[pio].active_time;
238 recovery_time = cycle_time - active_time;
241 printk(KERN_INFO "%s: PIO mode%d\n", drive->name,pio);
244 if (!HWIF(drive)->channel && drive->media != ide_disk) {
245 outb(0x5f, QD_CONTROL_PORT);
246 printk(KERN_WARNING "%s: ATAPI: disabled read-ahead FIFO "
247 "and post-write buffer on %s.\n",
248 drive->name, HWIF(drive)->name);
251 qd_set_timing(drive, qd6580_compute_timing(active_time, recovery_time));
257 * tests if the given port is a register
260 static int __init qd_testreg(int port)
265 local_irq_save(flags);
266 savereg = inb_p(port);
267 outb_p(QD_TESTVAL, port); /* safe value */
268 readreg = inb_p(port);
270 local_irq_restore(flags);
272 if (savereg == QD_TESTVAL) {
273 printk(KERN_ERR "Outch ! the probe for qd65xx isn't reliable !\n");
274 printk(KERN_ERR "Please contact maintainers to tell about your hardware\n");
275 printk(KERN_ERR "Assuming qd65xx is not present.\n");
279 return (readreg != QD_TESTVAL);
282 static void __init qd6500_port_init_devs(ide_hwif_t *hwif)
284 u8 base = (hwif->config_data & 0xff00) >> 8;
285 u8 config = QD_CONFIG(hwif);
287 hwif->drives[0].drive_data = QD6500_DEF_DATA;
288 hwif->drives[1].drive_data = QD6500_DEF_DATA;
291 static void __init qd6580_port_init_devs(ide_hwif_t *hwif)
294 u8 base = (hwif->config_data & 0xff00) >> 8;
295 u8 config = QD_CONFIG(hwif);
297 if (hwif->host_flags & IDE_HFLAG_SINGLE) {
298 t1 = QD6580_DEF_DATA;
299 t2 = QD6580_DEF_DATA2;
301 t2 = t1 = hwif->channel ? QD6580_DEF_DATA2 : QD6580_DEF_DATA;
303 hwif->drives[0].drive_data = t1;
304 hwif->drives[1].drive_data = t2;
307 static const struct ide_port_info qd65xx_port_info __initdata = {
308 .chipset = ide_qd65xx,
309 .host_flags = IDE_HFLAG_IO_32BIT |
311 IDE_HFLAG_NO_AUTOTUNE,
312 .pio_mask = ATA_PIO4,
318 * looks at the specified baseport, and if qd found, registers & initialises it
319 * return 1 if another qd may be probed
322 static int __init qd_probe(int base)
326 u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
328 struct ide_port_info d = qd65xx_port_info;
330 config = inb(QD_CONFIG_PORT);
332 if (! ((config & QD_CONFIG_BASEPORT) >> 1 == (base == 0xb0)) )
335 unit = ! (config & QD_CONFIG_IDE_BASEPORT);
338 d.host_flags |= IDE_HFLAG_QD_2ND_PORT;
340 memset(&hw, 0, sizeof(hw));
342 ide_std_init_ports(&hw[0], 0x1f0, 0x3f6);
345 ide_std_init_ports(&hw[1], 0x170, 0x376);
348 if ((config & 0xf0) == QD_CONFIG_QD6500) {
350 if (qd_testreg(base))
351 return -ENODEV; /* bad register */
355 if (config & QD_CONFIG_DISABLED) {
356 printk(KERN_WARNING "qd6500 is disabled !\n");
360 printk(KERN_NOTICE "qd6500 at %#x\n", base);
361 printk(KERN_DEBUG "qd6500: config=%#x, ID3=%u\n",
364 d.host_flags |= IDE_HFLAG_SINGLE;
366 hwif = ide_find_port_slot(&d);
370 ide_init_port_hw(hwif, &hw[unit]);
372 hwif->config_data = (base << 8) | config;
374 hwif->port_init_devs = qd6500_port_init_devs;
375 hwif->set_pio_mode = qd6500_set_pio_mode;
376 hwif->selectproc = qd65xx_select;
378 idx[unit] = hwif->index;
380 ide_device_add(idx, &d);
385 if (((config & 0xf0) == QD_CONFIG_QD6580_A) ||
386 ((config & 0xf0) == QD_CONFIG_QD6580_B)) {
390 if (qd_testreg(base) || qd_testreg(base + 0x02))
391 return -ENODEV; /* bad registers */
395 control = inb(QD_CONTROL_PORT);
397 printk(KERN_NOTICE "qd6580 at %#x\n", base);
398 printk(KERN_DEBUG "qd6580: config=%#x, control=%#x, ID3=%u\n",
399 config, control, QD_ID3);
401 outb(QD_DEF_CONTR, QD_CONTROL_PORT);
403 if (control & QD_CONTR_SEC_DISABLED) {
404 /* secondary disabled */
406 printk(KERN_INFO "qd6580: single IDE board\n");
408 d.host_flags |= IDE_HFLAG_SINGLE;
410 hwif = ide_find_port_slot(&d);
414 ide_init_port_hw(hwif, &hw[unit]);
416 hwif->config_data = (base << 8) | config;
418 hwif->port_init_devs = qd6580_port_init_devs;
419 hwif->set_pio_mode = qd6580_set_pio_mode;
420 hwif->selectproc = qd65xx_select;
422 idx[unit] = hwif->index;
424 ide_device_add(idx, &d);
430 /* secondary enabled */
431 printk(KERN_INFO "qd6580: dual IDE board\n");
433 hwif = ide_find_port();
435 ide_init_port_hw(hwif, &hw[0]);
436 hwif->config_data = (base << 8) | config;
437 hwif->port_init_devs = qd6580_port_init_devs;
438 hwif->set_pio_mode = qd6580_set_pio_mode;
439 hwif->selectproc = qd65xx_select;
440 idx[0] = hwif->index;
443 mate = ide_find_port();
445 ide_init_port_hw(mate, &hw[1]);
446 mate->config_data = (base << 8) | config;
447 mate->port_init_devs = qd6580_port_init_devs;
448 mate->set_pio_mode = qd6580_set_pio_mode;
449 mate->selectproc = qd65xx_select;
450 idx[1] = mate->index;
453 ide_device_add(idx, &qd65xx_port_info);
455 return 0; /* no other qd65xx possible */
458 /* no qd65xx found */
462 int probe_qd65xx = 0;
464 module_param_named(probe, probe_qd65xx, bool, 0);
465 MODULE_PARM_DESC(probe, "probe for QD65xx chipsets");
467 static int __init qd65xx_init(void)
469 int rc1, rc2 = -ENODEV;
471 if (probe_qd65xx == 0)
474 rc1 = qd_probe(0x30);
476 rc2 = qd_probe(0xb0);
478 if (rc1 < 0 && rc2 < 0)
484 module_init(qd65xx_init);
486 MODULE_AUTHOR("Samuel Thibault");
487 MODULE_DESCRIPTION("support of qd65xx vlb ide chipset");
488 MODULE_LICENSE("GPL");