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mac80211: fix virtual interfaces vs. injection
[linux/fpc-iii.git] / drivers / ide / legacy / qd65xx.c
blob2338f344ea243809b7fb5954d7e09e494303ada9
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@fnac.net>
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/hdreg.h>
31 #include <linux/ide.h>
32 #include <linux/init.h>
33 #include <asm/system.h>
34 #include <asm/io.h>
35
36 #define DRV_NAME "qd65xx"
37
38 #include "qd65xx.h"
39
40 /*
41 * I/O ports are 0x30-0x31 (and 0x32-0x33 for qd6580)
42 * or 0xb0-0xb1 (and 0xb2-0xb3 for qd6580)
43 * -- qd6500 is a single IDE interface
44 * -- qd6580 is a dual IDE interface
45 *
46 * More research on qd6580 being done by willmore@cig.mot.com (David)
47 * More Information given by Petr Soucek (petr@ryston.cz)
48 * http://www.ryston.cz/petr/vlb
49 */
50
51 /*
52 * base: Timer1
53 *
54 *
55 * base+0x01: Config (R/O)
56 *
57 * bit 0: ide baseport: 1 = 0x1f0 ; 0 = 0x170 (only useful for qd6500)
58 * bit 1: qd65xx baseport: 1 = 0xb0 ; 0 = 0x30
59 * bit 2: ID3: bus speed: 1 = <=33MHz ; 0 = >33MHz
60 * bit 3: qd6500: 1 = disabled, 0 = enabled
61 * qd6580: 1
62 * upper nibble:
63 * qd6500: 1100
64 * qd6580: either 1010 or 0101
65 *
66 *
67 * base+0x02: Timer2 (qd6580 only)
68 *
69 *
70 * base+0x03: Control (qd6580 only)
71 *
72 * bits 0-3 must always be set 1
73 * bit 4 must be set 1, but is set 0 by dos driver while measuring vlb clock
74 * bit 0 : 1 = Only primary port enabled : channel 0 for hda, channel 1 for hdb
75 * 0 = Primary and Secondary ports enabled : channel 0 for hda & hdb
76 * channel 1 for hdc & hdd
77 * bit 1 : 1 = only disks on primary port
78 * 0 = disks & ATAPI devices on primary port
79 * bit 2-4 : always 0
80 * bit 5 : status, but of what ?
81 * bit 6 : always set 1 by dos driver
82 * bit 7 : set 1 for non-ATAPI devices on primary port
83 * (maybe read-ahead and post-write buffer ?)
84 */
85
86 static int timings[4]={-1,-1,-1,-1}; /* stores current timing for each timer */
87
88 /*
89 * qd65xx_select:
90 *
91 * This routine is invoked to prepare for access to a given drive.
92 */
93
94 static void qd65xx_select(ide_drive_t *drive)
95 {
96 u8 index = (( (QD_TIMREG(drive)) & 0x80 ) >> 7) |
97 (QD_TIMREG(drive) & 0x02);
98
99 if (timings[index] != QD_TIMING(drive))
100 outb(timings[index] = QD_TIMING(drive), QD_TIMREG(drive));
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
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
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
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 model[40];
155
156 if (!*drive->id->model) return 0;
157
158 strncpy(model,drive->id->model,40);
159 ide_fixstring(model,40,1); /* byte-swap */
160
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;
166 return 1;
167 }
168 }
169 return 0;
170 }
171
172 /*
173 * qd_set_timing:
174 *
175 * records the timing
176 */
177
178 static void qd_set_timing (ide_drive_t *drive, u8 timing)
179 {
180 drive->drive_data &= 0xff00;
181 drive->drive_data |= timing;
182
183 printk(KERN_DEBUG "%s: %#x\n", drive->name, timing);
184 }
185
186 static void qd6500_set_pio_mode(ide_drive_t *drive, const u8 pio)
187 {
188 int active_time = 175;
189 int recovery_time = 415; /* worst case values from the dos driver */
190
191 /*
192 * FIXME: use "pio" value
193 */
194 if (drive->id && !qd_find_disk_type(drive, &active_time, &recovery_time)
195 && drive->id->tPIO && (drive->id->field_valid & 0x02)
196 && drive->id->eide_pio >= 240) {
197
198 printk(KERN_INFO "%s: PIO mode%d\n", drive->name,
199 drive->id->tPIO);
200 active_time = 110;
201 recovery_time = drive->id->eide_pio - 120;
202 }
203
204 qd_set_timing(drive, qd6500_compute_timing(HWIF(drive), active_time, recovery_time));
205 }
206
207 static void qd6580_set_pio_mode(ide_drive_t *drive, const u8 pio)
208 {
209 ide_hwif_t *hwif = drive->hwif;
210 struct ide_timing *t = ide_timing_find_mode(XFER_PIO_0 + pio);
211 unsigned int cycle_time;
212 int active_time = 175;
213 int recovery_time = 415; /* worst case values from the dos driver */
214 u8 base = (hwif->config_data & 0xff00) >> 8;
215
216 if (drive->id && !qd_find_disk_type(drive, &active_time, &recovery_time)) {
217 cycle_time = ide_pio_cycle_time(drive, pio);
218
219 switch (pio) {
220 case 0: break;
221 case 3:
222 if (cycle_time >= 110) {
223 active_time = 86;
224 recovery_time = cycle_time - 102;
225 } else
226 printk(KERN_WARNING "%s: Strange recovery time !\n",drive->name);
227 break;
228 case 4:
229 if (cycle_time >= 69) {
230 active_time = 70;
231 recovery_time = cycle_time - 61;
232 } else
233 printk(KERN_WARNING "%s: Strange recovery time !\n",drive->name);
234 break;
235 default:
236 if (cycle_time >= 180) {
237 active_time = 110;
238 recovery_time = cycle_time - 120;
239 } else {
240 active_time = t->active;
241 recovery_time = cycle_time - active_time;
242 }
243 }
244 printk(KERN_INFO "%s: PIO mode%d\n", drive->name,pio);
245 }
246
247 if (!HWIF(drive)->channel && drive->media != ide_disk) {
248 outb(0x5f, QD_CONTROL_PORT);
249 printk(KERN_WARNING "%s: ATAPI: disabled read-ahead FIFO "
250 "and post-write buffer on %s.\n",
251 drive->name, HWIF(drive)->name);
252 }
253
254 qd_set_timing(drive, qd6580_compute_timing(active_time, recovery_time));
255 }
256
257 /*
258 * qd_testreg
259 *
260 * tests if the given port is a register
261 */
262
263 static int __init qd_testreg(int port)
264 {
265 unsigned long flags;
266 u8 savereg, readreg;
267
268 local_irq_save(flags);
269 savereg = inb_p(port);
270 outb_p(QD_TESTVAL, port); /* safe value */
271 readreg = inb_p(port);
272 outb(savereg, port);
273 local_irq_restore(flags);
274
275 if (savereg == QD_TESTVAL) {
276 printk(KERN_ERR "Outch ! the probe for qd65xx isn't reliable !\n");
277 printk(KERN_ERR "Please contact maintainers to tell about your hardware\n");
278 printk(KERN_ERR "Assuming qd65xx is not present.\n");
279 return 1;
280 }
281
282 return (readreg != QD_TESTVAL);
283 }
284
285 static void __init qd6500_init_dev(ide_drive_t *drive)
286 {
287 ide_hwif_t *hwif = drive->hwif;
288 u8 base = (hwif->config_data & 0xff00) >> 8;
289 u8 config = QD_CONFIG(hwif);
290
291 drive->drive_data = QD6500_DEF_DATA;
292 }
293
294 static void __init qd6580_init_dev(ide_drive_t *drive)
295 {
296 ide_hwif_t *hwif = drive->hwif;
297 u16 t1, t2;
298 u8 base = (hwif->config_data & 0xff00) >> 8;
299 u8 config = QD_CONFIG(hwif);
300
301 if (hwif->host_flags & IDE_HFLAG_SINGLE) {
302 t1 = QD6580_DEF_DATA;
303 t2 = QD6580_DEF_DATA2;
304 } else
305 t2 = t1 = hwif->channel ? QD6580_DEF_DATA2 : QD6580_DEF_DATA;
306
307 drive->drive_data = drive->select.b.unit ? t2 : t1;
308 }
309
310 static const struct ide_port_ops qd6500_port_ops = {
311 .init_dev = qd6500_init_dev,
312 .set_pio_mode = qd6500_set_pio_mode,
313 .selectproc = qd65xx_select,
314 };
315
316 static const struct ide_port_ops qd6580_port_ops = {
317 .init_dev = qd6580_init_dev,
318 .set_pio_mode = qd6580_set_pio_mode,
319 .selectproc = qd65xx_select,
320 };
321
322 static const struct ide_port_info qd65xx_port_info __initdata = {
323 .name = DRV_NAME,
324 .chipset = ide_qd65xx,
325 .host_flags = IDE_HFLAG_IO_32BIT |
326 IDE_HFLAG_NO_DMA,
327 .pio_mask = ATA_PIO4,
328 };
329
330 /*
331 * qd_probe:
332 *
333 * looks at the specified baseport, and if qd found, registers & initialises it
334 * return 1 if another qd may be probed
335 */
336
337 static int __init qd_probe(int base)
338 {
339 int rc;
340 u8 config, unit, control;
341 struct ide_port_info d = qd65xx_port_info;
342
343 config = inb(QD_CONFIG_PORT);
344
345 if (! ((config & QD_CONFIG_BASEPORT) >> 1 == (base == 0xb0)) )
346 return -ENODEV;
347
348 unit = ! (config & QD_CONFIG_IDE_BASEPORT);
349
350 if (unit)
351 d.host_flags |= IDE_HFLAG_QD_2ND_PORT;
352
353 switch (config & 0xf0) {
354 case QD_CONFIG_QD6500:
355 if (qd_testreg(base))
356 return -ENODEV; /* bad register */
357
358 if (config & QD_CONFIG_DISABLED) {
359 printk(KERN_WARNING "qd6500 is disabled !\n");
360 return -ENODEV;
361 }
362
363 printk(KERN_NOTICE "qd6500 at %#x\n", base);
364 printk(KERN_DEBUG "qd6500: config=%#x, ID3=%u\n",
365 config, QD_ID3);
366
367 d.port_ops = &qd6500_port_ops;
368 d.host_flags |= IDE_HFLAG_SINGLE;
369 break;
370 case QD_CONFIG_QD6580_A:
371 case QD_CONFIG_QD6580_B:
372 if (qd_testreg(base) || qd_testreg(base + 0x02))
373 return -ENODEV; /* bad registers */
374
375 control = inb(QD_CONTROL_PORT);
376
377 printk(KERN_NOTICE "qd6580 at %#x\n", base);
378 printk(KERN_DEBUG "qd6580: config=%#x, control=%#x, ID3=%u\n",
379 config, control, QD_ID3);
380
381 outb(QD_DEF_CONTR, QD_CONTROL_PORT);
382
383 d.port_ops = &qd6580_port_ops;
384 if (control & QD_CONTR_SEC_DISABLED)
385 d.host_flags |= IDE_HFLAG_SINGLE;
386
387 printk(KERN_INFO "qd6580: %s IDE board\n",
388 (control & QD_CONTR_SEC_DISABLED) ? "single" : "dual");
389 break;
390 default:
391 return -ENODEV;
392 }
393
394 rc = ide_legacy_device_add(&d, (base << 8) | config);
395
396 if (d.host_flags & IDE_HFLAG_SINGLE)
397 return (rc == 0) ? 1 : rc;
398
399 return rc;
400 }
401
402 static int probe_qd65xx;
403
404 module_param_named(probe, probe_qd65xx, bool, 0);
405 MODULE_PARM_DESC(probe, "probe for QD65xx chipsets");
406
407 static int __init qd65xx_init(void)
408 {
409 int rc1, rc2 = -ENODEV;
410
411 if (probe_qd65xx == 0)
412 return -ENODEV;
413
414 rc1 = qd_probe(0x30);
415 if (rc1)
416 rc2 = qd_probe(0xb0);
417
418 if (rc1 < 0 && rc2 < 0)
419 return -ENODEV;
420
421 return 0;
422 }
423
424 module_init(qd65xx_init);
425
426 MODULE_AUTHOR("Samuel Thibault");
427 MODULE_DESCRIPTION("support of qd65xx vlb ide chipset");
428 MODULE_LICENSE("GPL");
Linux with added FPC-III support