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>
40 #define DRV_NAME "qd65xx"
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 to prepare for access to a given drive.
98 static void qd65xx_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 int clk = ide_vlb_clk ? ide_vlb_clk : system_bus_clock();
121 act_cyc = 9 - IDE_IN(active_time * clk / 1000 + 1, 2, 9);
122 rec_cyc = 15 - IDE_IN(recovery_time * clk / 1000 + 1, 0, 15);
124 act_cyc = 8 - IDE_IN(active_time * clk / 1000 + 1, 1, 8);
125 rec_cyc = 18 - IDE_IN(recovery_time * clk / 1000 + 1, 3, 18);
128 return (rec_cyc << 4) | 0x08 | act_cyc;
132 * qd6580_compute_timing
137 static u8 qd6580_compute_timing (int active_time, int recovery_time)
139 int clk = ide_vlb_clk ? ide_vlb_clk : system_bus_clock();
142 act_cyc = 17 - IDE_IN(active_time * clk / 1000 + 1, 2, 17);
143 rec_cyc = 15 - IDE_IN(recovery_time * clk / 1000 + 1, 2, 15);
145 return (rec_cyc << 4) | act_cyc;
151 * tries to find timing from dos driver's table
154 static int qd_find_disk_type (ide_drive_t *drive,
155 int *active_time, int *recovery_time)
157 struct qd65xx_timing_s *p;
160 if (!*drive->id->model) return 0;
162 strncpy(model,drive->id->model,40);
163 ide_fixstring(model,40,1); /* byte-swap */
165 for (p = qd65xx_timing ; p->offset != -1 ; p++) {
166 if (!strncmp(p->model, model+p->offset, 4)) {
167 printk(KERN_DEBUG "%s: listed !\n", drive->name);
168 *active_time = p->active;
169 *recovery_time = p->recovery;
182 static void qd_set_timing (ide_drive_t *drive, u8 timing)
184 drive->drive_data &= 0xff00;
185 drive->drive_data |= timing;
187 printk(KERN_DEBUG "%s: %#x\n", drive->name, timing);
190 static void qd6500_set_pio_mode(ide_drive_t *drive, const u8 pio)
192 int active_time = 175;
193 int recovery_time = 415; /* worst case values from the dos driver */
196 * FIXME: use "pio" value
198 if (drive->id && !qd_find_disk_type(drive, &active_time, &recovery_time)
199 && drive->id->tPIO && (drive->id->field_valid & 0x02)
200 && drive->id->eide_pio >= 240) {
202 printk(KERN_INFO "%s: PIO mode%d\n", drive->name,
205 recovery_time = drive->id->eide_pio - 120;
208 qd_set_timing(drive, qd6500_compute_timing(HWIF(drive), active_time, recovery_time));
211 static void qd6580_set_pio_mode(ide_drive_t *drive, const u8 pio)
213 ide_hwif_t *hwif = drive->hwif;
214 unsigned int cycle_time;
215 int active_time = 175;
216 int recovery_time = 415; /* worst case values from the dos driver */
217 u8 base = (hwif->config_data & 0xff00) >> 8;
219 if (drive->id && !qd_find_disk_type(drive, &active_time, &recovery_time)) {
220 cycle_time = ide_pio_cycle_time(drive, pio);
225 if (cycle_time >= 110) {
227 recovery_time = cycle_time - 102;
229 printk(KERN_WARNING "%s: Strange recovery time !\n",drive->name);
232 if (cycle_time >= 69) {
234 recovery_time = cycle_time - 61;
236 printk(KERN_WARNING "%s: Strange recovery time !\n",drive->name);
239 if (cycle_time >= 180) {
241 recovery_time = cycle_time - 120;
243 active_time = ide_pio_timings[pio].active_time;
244 recovery_time = cycle_time - active_time;
247 printk(KERN_INFO "%s: PIO mode%d\n", drive->name,pio);
250 if (!HWIF(drive)->channel && drive->media != ide_disk) {
251 outb(0x5f, QD_CONTROL_PORT);
252 printk(KERN_WARNING "%s: ATAPI: disabled read-ahead FIFO "
253 "and post-write buffer on %s.\n",
254 drive->name, HWIF(drive)->name);
257 qd_set_timing(drive, qd6580_compute_timing(active_time, recovery_time));
263 * tests if the given port is a register
266 static int __init qd_testreg(int port)
271 local_irq_save(flags);
272 savereg = inb_p(port);
273 outb_p(QD_TESTVAL, port); /* safe value */
274 readreg = inb_p(port);
276 local_irq_restore(flags);
278 if (savereg == QD_TESTVAL) {
279 printk(KERN_ERR "Outch ! the probe for qd65xx isn't reliable !\n");
280 printk(KERN_ERR "Please contact maintainers to tell about your hardware\n");
281 printk(KERN_ERR "Assuming qd65xx is not present.\n");
285 return (readreg != QD_TESTVAL);
288 static void __init qd6500_port_init_devs(ide_hwif_t *hwif)
290 u8 base = (hwif->config_data & 0xff00) >> 8;
291 u8 config = QD_CONFIG(hwif);
293 hwif->drives[0].drive_data = QD6500_DEF_DATA;
294 hwif->drives[1].drive_data = QD6500_DEF_DATA;
297 static void __init qd6580_port_init_devs(ide_hwif_t *hwif)
300 u8 base = (hwif->config_data & 0xff00) >> 8;
301 u8 config = QD_CONFIG(hwif);
303 if (hwif->host_flags & IDE_HFLAG_SINGLE) {
304 t1 = QD6580_DEF_DATA;
305 t2 = QD6580_DEF_DATA2;
307 t2 = t1 = hwif->channel ? QD6580_DEF_DATA2 : QD6580_DEF_DATA;
309 hwif->drives[0].drive_data = t1;
310 hwif->drives[1].drive_data = t2;
313 static const struct ide_port_ops qd6500_port_ops = {
314 .port_init_devs = qd6500_port_init_devs,
315 .set_pio_mode = qd6500_set_pio_mode,
316 .selectproc = qd65xx_select,
319 static const struct ide_port_ops qd6580_port_ops = {
320 .port_init_devs = qd6580_port_init_devs,
321 .set_pio_mode = qd6580_set_pio_mode,
322 .selectproc = qd65xx_select,
325 static const struct ide_port_info qd65xx_port_info __initdata = {
327 .chipset = ide_qd65xx,
328 .host_flags = IDE_HFLAG_IO_32BIT |
330 IDE_HFLAG_NO_AUTOTUNE,
331 .pio_mask = ATA_PIO4,
337 * looks at the specified baseport, and if qd found, registers & initialises it
338 * return 1 if another qd may be probed
341 static int __init qd_probe(int base)
344 u8 config, unit, control;
345 struct ide_port_info d = qd65xx_port_info;
347 config = inb(QD_CONFIG_PORT);
349 if (! ((config & QD_CONFIG_BASEPORT) >> 1 == (base == 0xb0)) )
352 unit = ! (config & QD_CONFIG_IDE_BASEPORT);
355 d.host_flags |= IDE_HFLAG_QD_2ND_PORT;
357 switch (config & 0xf0) {
358 case QD_CONFIG_QD6500:
359 if (qd_testreg(base))
360 return -ENODEV; /* bad register */
362 if (config & QD_CONFIG_DISABLED) {
363 printk(KERN_WARNING "qd6500 is disabled !\n");
367 printk(KERN_NOTICE "qd6500 at %#x\n", base);
368 printk(KERN_DEBUG "qd6500: config=%#x, ID3=%u\n",
371 d.port_ops = &qd6500_port_ops;
372 d.host_flags |= IDE_HFLAG_SINGLE;
374 case QD_CONFIG_QD6580_A:
375 case QD_CONFIG_QD6580_B:
376 if (qd_testreg(base) || qd_testreg(base + 0x02))
377 return -ENODEV; /* bad registers */
379 control = inb(QD_CONTROL_PORT);
381 printk(KERN_NOTICE "qd6580 at %#x\n", base);
382 printk(KERN_DEBUG "qd6580: config=%#x, control=%#x, ID3=%u\n",
383 config, control, QD_ID3);
385 outb(QD_DEF_CONTR, QD_CONTROL_PORT);
387 d.port_ops = &qd6580_port_ops;
388 if (control & QD_CONTR_SEC_DISABLED)
389 d.host_flags |= IDE_HFLAG_SINGLE;
391 printk(KERN_INFO "qd6580: %s IDE board\n",
392 (control & QD_CONTR_SEC_DISABLED) ? "single" : "dual");
398 rc = ide_legacy_device_add(&d, (base << 8) | config);
400 if (d.host_flags & IDE_HFLAG_SINGLE)
401 return (rc == 0) ? 1 : rc;
406 static int probe_qd65xx;
408 module_param_named(probe, probe_qd65xx, bool, 0);
409 MODULE_PARM_DESC(probe, "probe for QD65xx chipsets");
411 static int __init qd65xx_init(void)
413 int rc1, rc2 = -ENODEV;
415 if (probe_qd65xx == 0)
418 rc1 = qd_probe(0x30);
420 rc2 = qd_probe(0xb0);
422 if (rc1 < 0 && rc2 < 0)
428 module_init(qd65xx_init);
430 MODULE_AUTHOR("Samuel Thibault");
431 MODULE_DESCRIPTION("support of qd65xx vlb ide chipset");
432 MODULE_LICENSE("GPL");