1 /*
2 * Copyright (C) 1996-2001 Linus Torvalds & author (see below)
3 */
4
5 /*
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
11 *
12 * QDI QD6500/QD6580 EIDE controller fast support
13 *
14 * To activate controller support, use "ide0=qd65xx"
15 */
16
17 /*
18 * Rewritten from the work of Colten Edwards <pje120@cs.usask.ca> by
19 * Samuel Thibault <samuel.thibault@ens-lyon.org>
20 */
21
22 #include <linux/module.h>
23 #include <linux/types.h>
24 #include <linux/kernel.h>
25 #include <linux/delay.h>
26 #include <linux/timer.h>
27 #include <linux/mm.h>
28 #include <linux/ioport.h>
29 #include <linux/blkdev.h>
30 #include <linux/ide.h>
31 #include <linux/init.h>
32 #include <asm/io.h>
33
34 #define DRV_NAME "qd65xx"
35
36 #include "qd65xx.h"
37
38 /*
39 * I/O ports are 0x30-0x31 (and 0x32-0x33 for qd6580)
40 * or 0xb0-0xb1 (and 0xb2-0xb3 for qd6580)
41 * -- qd6500 is a single IDE interface
42 * -- qd6580 is a dual IDE interface
43 *
44 * More research on qd6580 being done by willmore@cig.mot.com (David)
45 * More Information given by Petr Soucek (petr@ryston.cz)
46 * http://www.ryston.cz/petr/vlb
47 */
48
49 /*
50 * base: Timer1
51 *
52 *
53 * base+0x01: Config (R/O)
54 *
55 * bit 0: ide baseport: 1 = 0x1f0 ; 0 = 0x170 (only useful for qd6500)
56 * bit 1: qd65xx baseport: 1 = 0xb0 ; 0 = 0x30
57 * bit 2: ID3: bus speed: 1 = <=33MHz ; 0 = >33MHz
58 * bit 3: qd6500: 1 = disabled, 0 = enabled
59 * qd6580: 1
60 * upper nibble:
61 * qd6500: 1100
62 * qd6580: either 1010 or 0101
63 *
64 *
65 * base+0x02: Timer2 (qd6580 only)
66 *
67 *
68 * base+0x03: Control (qd6580 only)
69 *
70 * bits 0-3 must always be set 1
71 * bit 4 must be set 1, but is set 0 by dos driver while measuring vlb clock
72 * bit 0 : 1 = Only primary port enabled : channel 0 for hda, channel 1 for hdb
73 * 0 = Primary and Secondary ports enabled : channel 0 for hda & hdb
74 * channel 1 for hdc & hdd
75 * bit 1 : 1 = only disks on primary port
76 * 0 = disks & ATAPI devices on primary port
77 * bit 2-4 : always 0
78 * bit 5 : status, but of what ?
79 * bit 6 : always set 1 by dos driver
80 * bit 7 : set 1 for non-ATAPI devices on primary port
81 * (maybe read-ahead and post-write buffer ?)
82 */
83
84 static int timings[4]={-1,-1,-1,-1}; /* stores current timing for each timer */
85
86 /*
87 * qd65xx_select:
88 *
89 * This routine is invoked to prepare for access to a given drive.
90 */
91
qd65xx_dev_select(ide_drive_t * drive)92 static void qd65xx_dev_select(ide_drive_t *drive)
93 {
94 u8 index = (( (QD_TIMREG(drive)) & 0x80 ) >> 7) |
95 (QD_TIMREG(drive) & 0x02);
96
97 if (timings[index] != QD_TIMING(drive))
98 outb(timings[index] = QD_TIMING(drive), QD_TIMREG(drive));
99
100 outb(drive->select | ATA_DEVICE_OBS, drive->hwif->io_ports.device_addr);
101 }
102
103 /*
104 * qd6500_compute_timing
105 *
106 * computes the timing value where
107 * lower nibble represents active time, in count of VLB clocks
108 * upper nibble represents recovery time, in count of VLB clocks
109 */
110
qd6500_compute_timing(ide_hwif_t * hwif,int active_time,int recovery_time)111 static u8 qd6500_compute_timing (ide_hwif_t *hwif, int active_time, int recovery_time)
112 {
113 int clk = ide_vlb_clk ? ide_vlb_clk : 50;
114 u8 act_cyc, rec_cyc;
115
116 if (clk <= 33) {
117 act_cyc = 9 - IDE_IN(active_time * clk / 1000 + 1, 2, 9);
118 rec_cyc = 15 - IDE_IN(recovery_time * clk / 1000 + 1, 0, 15);
119 } else {
120 act_cyc = 8 - IDE_IN(active_time * clk / 1000 + 1, 1, 8);
121 rec_cyc = 18 - IDE_IN(recovery_time * clk / 1000 + 1, 3, 18);
122 }
123
124 return (rec_cyc << 4) | 0x08 | act_cyc;
125 }
126
127 /*
128 * qd6580_compute_timing
129 *
130 * idem for qd6580
131 */
132
qd6580_compute_timing(int active_time,int recovery_time)133 static u8 qd6580_compute_timing (int active_time, int recovery_time)
134 {
135 int clk = ide_vlb_clk ? ide_vlb_clk : 50;
136 u8 act_cyc, rec_cyc;
137
138 act_cyc = 17 - IDE_IN(active_time * clk / 1000 + 1, 2, 17);
139 rec_cyc = 15 - IDE_IN(recovery_time * clk / 1000 + 1, 2, 15);
140
141 return (rec_cyc << 4) | act_cyc;
142 }
143
144 /*
145 * qd_find_disk_type
146 *
147 * tries to find timing from dos driver's table
148 */
149
qd_find_disk_type(ide_drive_t * drive,int * active_time,int * recovery_time)150 static int qd_find_disk_type (ide_drive_t *drive,
151 int *active_time, int *recovery_time)
152 {
153 struct qd65xx_timing_s *p;
154 char *m = (char *)&drive->id[ATA_ID_PROD];
155 char model[ATA_ID_PROD_LEN];
156
157 if (*m == 0)
158 return 0;
159
160 strncpy(model, m, ATA_ID_PROD_LEN);
161 ide_fixstring(model, ATA_ID_PROD_LEN, 1); /* byte-swap */
162
163 for (p = qd65xx_timing ; p->offset != -1 ; p++) {
164 if (!strncmp(p->model, model+p->offset, 4)) {
165 printk(KERN_DEBUG "%s: listed !\n", drive->name);
166 *active_time = p->active;
167 *recovery_time = p->recovery;
168 return 1;
169 }
170 }
171 return 0;
172 }
173
174 /*
175 * qd_set_timing:
176 *
177 * records the timing
178 */
179
qd_set_timing(ide_drive_t * drive,u8 timing)180 static void qd_set_timing (ide_drive_t *drive, u8 timing)
181 {
182 unsigned long data = (unsigned long)ide_get_drivedata(drive);
183
184 data &= 0xff00;
185 data |= timing;
186 ide_set_drivedata(drive, (void *)data);
187
188 printk(KERN_DEBUG "%s: %#x\n", drive->name, timing);
189 }
190
qd6500_set_pio_mode(ide_hwif_t * hwif,ide_drive_t * drive)191 static void qd6500_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
192 {
193 u16 *id = drive->id;
194 int active_time = 175;
195 int recovery_time = 415; /* worst case values from the dos driver */
196
197 /* FIXME: use drive->pio_mode value */
198 if (!qd_find_disk_type(drive, &active_time, &recovery_time) &&
199 (id[ATA_ID_OLD_PIO_MODES] & 0xff) && (id[ATA_ID_FIELD_VALID] & 2) &&
200 id[ATA_ID_EIDE_PIO] >= 240) {
201 printk(KERN_INFO "%s: PIO mode%d\n", drive->name,
202 id[ATA_ID_OLD_PIO_MODES] & 0xff);
203 active_time = 110;
204 recovery_time = drive->id[ATA_ID_EIDE_PIO] - 120;
205 }
206
207 qd_set_timing(drive, qd6500_compute_timing(drive->hwif,
208 active_time, recovery_time));
209 }
210
qd6580_set_pio_mode(ide_hwif_t * hwif,ide_drive_t * drive)211 static void qd6580_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
212 {
213 const u8 pio = drive->pio_mode - XFER_PIO_0;
214 struct ide_timing *t = ide_timing_find_mode(XFER_PIO_0 + pio);
215 unsigned int cycle_time;
216 int active_time = 175;
217 int recovery_time = 415; /* worst case values from the dos driver */
218 u8 base = (hwif->config_data & 0xff00) >> 8;
219
220 if (drive->id && !qd_find_disk_type(drive, &active_time, &recovery_time)) {
221 cycle_time = ide_pio_cycle_time(drive, pio);
222
223 switch (pio) {
224 case 0: break;
225 case 3:
226 if (cycle_time >= 110) {
227 active_time = 86;
228 recovery_time = cycle_time - 102;
229 } else
230 printk(KERN_WARNING "%s: Strange recovery time !\n",drive->name);
231 break;
232 case 4:
233 if (cycle_time >= 69) {
234 active_time = 70;
235 recovery_time = cycle_time - 61;
236 } else
237 printk(KERN_WARNING "%s: Strange recovery time !\n",drive->name);
238 break;
239 default:
240 if (cycle_time >= 180) {
241 active_time = 110;
242 recovery_time = cycle_time - 120;
243 } else {
244 active_time = t->active;
245 recovery_time = cycle_time - active_time;
246 }
247 }
248 printk(KERN_INFO "%s: PIO mode%d\n", drive->name,pio);
249 }
250
251 if (!hwif->channel && drive->media != ide_disk) {
252 outb(0x5f, QD_CONTROL_PORT);
253 printk(KERN_WARNING "%s: ATAPI: disabled read-ahead FIFO "
254 "and post-write buffer on %s.\n",
255 drive->name, hwif->name);
256 }
257
258 qd_set_timing(drive, qd6580_compute_timing(active_time, recovery_time));
259 }
260
261 /*
262 * qd_testreg
263 *
264 * tests if the given port is a register
265 */
266
qd_testreg(int port)267 static int __init qd_testreg(int port)
268 {
269 unsigned long flags;
270 u8 savereg, readreg;
271
272 local_irq_save(flags);
273 savereg = inb_p(port);
274 outb_p(QD_TESTVAL, port); /* safe value */
275 readreg = inb_p(port);
276 outb(savereg, port);
277 local_irq_restore(flags);
278
279 if (savereg == QD_TESTVAL) {
280 printk(KERN_ERR "Outch ! the probe for qd65xx isn't reliable !\n");
281 printk(KERN_ERR "Please contact maintainers to tell about your hardware\n");
282 printk(KERN_ERR "Assuming qd65xx is not present.\n");
283 return 1;
284 }
285
286 return (readreg != QD_TESTVAL);
287 }
288
qd6500_init_dev(ide_drive_t * drive)289 static void __init qd6500_init_dev(ide_drive_t *drive)
290 {
291 ide_hwif_t *hwif = drive->hwif;
292 u8 base = (hwif->config_data & 0xff00) >> 8;
293 u8 config = QD_CONFIG(hwif);
294
295 ide_set_drivedata(drive, (void *)QD6500_DEF_DATA);
296 }
297
qd6580_init_dev(ide_drive_t * drive)298 static void __init qd6580_init_dev(ide_drive_t *drive)
299 {
300 ide_hwif_t *hwif = drive->hwif;
301 u16 t1, t2;
302 u8 base = (hwif->config_data & 0xff00) >> 8;
303 u8 config = QD_CONFIG(hwif);
304
305 if (hwif->host_flags & IDE_HFLAG_SINGLE) {
306 t1 = QD6580_DEF_DATA;
307 t2 = QD6580_DEF_DATA2;
308 } else
309 t2 = t1 = hwif->channel ? QD6580_DEF_DATA2 : QD6580_DEF_DATA;
310
311 ide_set_drivedata(drive, (void *)((drive->dn & 1) ? t2 : t1));
312 }
313
314 static const struct ide_tp_ops qd65xx_tp_ops = {
315 .exec_command = ide_exec_command,
316 .read_status = ide_read_status,
317 .read_altstatus = ide_read_altstatus,
318 .write_devctl = ide_write_devctl,
319
320 .dev_select = qd65xx_dev_select,
321 .tf_load = ide_tf_load,
322 .tf_read = ide_tf_read,
323
324 .input_data = ide_input_data,
325 .output_data = ide_output_data,
326 };
327
328 static const struct ide_port_ops qd6500_port_ops = {
329 .init_dev = qd6500_init_dev,
330 .set_pio_mode = qd6500_set_pio_mode,
331 };
332
333 static const struct ide_port_ops qd6580_port_ops = {
334 .init_dev = qd6580_init_dev,
335 .set_pio_mode = qd6580_set_pio_mode,
336 };
337
338 static const struct ide_port_info qd65xx_port_info __initdata = {
339 .name = DRV_NAME,
340 .tp_ops = &qd65xx_tp_ops,
341 .chipset = ide_qd65xx,
342 .host_flags = IDE_HFLAG_IO_32BIT |
343 IDE_HFLAG_NO_DMA,
344 .pio_mask = ATA_PIO4,
345 };
346
347 /*
348 * qd_probe:
349 *
350 * looks at the specified baseport, and if qd found, registers & initialises it
351 * return 1 if another qd may be probed
352 */
353
qd_probe(int base)354 static int __init qd_probe(int base)
355 {
356 int rc;
357 u8 config, unit, control;
358 struct ide_port_info d = qd65xx_port_info;
359
360 config = inb(QD_CONFIG_PORT);
361
362 if (! ((config & QD_CONFIG_BASEPORT) >> 1 == (base == 0xb0)) )
363 return -ENODEV;
364
365 unit = ! (config & QD_CONFIG_IDE_BASEPORT);
366
367 if (unit)
368 d.host_flags |= IDE_HFLAG_QD_2ND_PORT;
369
370 switch (config & 0xf0) {
371 case QD_CONFIG_QD6500:
372 if (qd_testreg(base))
373 return -ENODEV; /* bad register */
374
375 if (config & QD_CONFIG_DISABLED) {
376 printk(KERN_WARNING "qd6500 is disabled !\n");
377 return -ENODEV;
378 }
379
380 printk(KERN_NOTICE "qd6500 at %#x\n", base);
381 printk(KERN_DEBUG "qd6500: config=%#x, ID3=%u\n",
382 config, QD_ID3);
383
384 d.port_ops = &qd6500_port_ops;
385 d.host_flags |= IDE_HFLAG_SINGLE;
386 break;
387 case QD_CONFIG_QD6580_A:
388 case QD_CONFIG_QD6580_B:
389 if (qd_testreg(base) || qd_testreg(base + 0x02))
390 return -ENODEV; /* bad registers */
391
392 control = inb(QD_CONTROL_PORT);
393
394 printk(KERN_NOTICE "qd6580 at %#x\n", base);
395 printk(KERN_DEBUG "qd6580: config=%#x, control=%#x, ID3=%u\n",
396 config, control, QD_ID3);
397
398 outb(QD_DEF_CONTR, QD_CONTROL_PORT);
399
400 d.port_ops = &qd6580_port_ops;
401 if (control & QD_CONTR_SEC_DISABLED)
402 d.host_flags |= IDE_HFLAG_SINGLE;
403
404 printk(KERN_INFO "qd6580: %s IDE board\n",
405 (control & QD_CONTR_SEC_DISABLED) ? "single" : "dual");
406 break;
407 default:
408 return -ENODEV;
409 }
410
411 rc = ide_legacy_device_add(&d, (base << 8) | config);
412
413 if (d.host_flags & IDE_HFLAG_SINGLE)
414 return (rc == 0) ? 1 : rc;
415
416 return rc;
417 }
418
419 static bool probe_qd65xx;
420
421 module_param_named(probe, probe_qd65xx, bool, 0);
422 MODULE_PARM_DESC(probe, "probe for QD65xx chipsets");
423
qd65xx_init(void)424 static int __init qd65xx_init(void)
425 {
426 int rc1, rc2 = -ENODEV;
427
428 if (probe_qd65xx == 0)
429 return -ENODEV;
430
431 rc1 = qd_probe(0x30);
432 if (rc1)
433 rc2 = qd_probe(0xb0);
434
435 if (rc1 < 0 && rc2 < 0)
436 return -ENODEV;
437
438 return 0;
439 }
440
441 module_init(qd65xx_init);
442
443 MODULE_AUTHOR("Samuel Thibault");
444 MODULE_DESCRIPTION("support of qd65xx vlb ide chipset");
445 MODULE_LICENSE("GPL");
446