]>
Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Copyright (C) 1995-2000 Linus Torvalds & author (see below) |
3 | */ | |
4 | ||
5 | /* | |
6 | * | |
7 | * Version 0.01 Initial version hacked out of ide.c | |
8 | * | |
9 | * Version 0.02 Added support for PIO modes, auto-tune | |
10 | * | |
11 | * Version 0.03 Some cleanups | |
12 | * | |
13 | * Version 0.05 PIO mode cycle timings auto-tune using bus-speed | |
14 | * | |
15 | * Version 0.06 Prefetch mode now defaults no OFF. To set | |
16 | * prefetch mode OFF/ON use "hdparm -p8/-p9". | |
17 | * Unmask irq is disabled when prefetch mode | |
18 | * is enabled. | |
19 | * | |
20 | * Version 0.07 Trying to fix CD-ROM detection problem. | |
21 | * "Prefetch" mode bit OFF for ide disks and | |
22 | * ON for anything else. | |
23 | * | |
0e7d8d48 JEG |
24 | * Version 0.08 Need to force prefetch for CDs and other non-disk |
25 | * devices. (not sure which devices exactly need | |
26 | * prefetch) | |
1da177e4 LT |
27 | * |
28 | * HT-6560B EIDE-controller support | |
29 | * To activate controller support use kernel parameter "ide0=ht6560b". | |
30 | * Use hdparm utility to enable PIO mode support. | |
31 | * | |
32 | * Author: Mikko Ala-Fossi <maf@iki.fi> | |
0e7d8d48 | 33 | * Jan Evert van Grootheest <janevert@caiway.nl> |
1da177e4 LT |
34 | * |
35 | * Try: http://www.maf.iki.fi/~maf/ht6560b/ | |
36 | */ | |
37 | ||
2e4ed295 | 38 | #define DRV_NAME "ht6560b" |
0e7d8d48 | 39 | #define HT6560B_VERSION "v0.08" |
1da177e4 | 40 | |
1da177e4 | 41 | #include <linux/module.h> |
1da177e4 LT |
42 | #include <linux/types.h> |
43 | #include <linux/kernel.h> | |
44 | #include <linux/delay.h> | |
45 | #include <linux/timer.h> | |
46 | #include <linux/mm.h> | |
47 | #include <linux/ioport.h> | |
48 | #include <linux/blkdev.h> | |
49 | #include <linux/hdreg.h> | |
50 | #include <linux/ide.h> | |
51 | #include <linux/init.h> | |
52 | ||
53 | #include <asm/io.h> | |
54 | ||
55 | /* #define DEBUG */ /* remove comments for DEBUG messages */ | |
56 | ||
57 | /* | |
58 | * The special i/o-port that HT-6560B uses to configuration: | |
59 | * bit0 (0x01): "1" selects secondary interface | |
60 | * bit2 (0x04): "1" enables FIFO function | |
61 | * bit5 (0x20): "1" enables prefetched data read function (???) | |
62 | * | |
63 | * The special i/o-port that HT-6560A uses to configuration: | |
64 | * bit0 (0x01): "1" selects secondary interface | |
65 | * bit1 (0x02): "1" enables prefetched data read function | |
66 | * bit2 (0x04): "0" enables multi-master system (?) | |
67 | * bit3 (0x08): "1" 3 cycle time, "0" 2 cycle time (?) | |
68 | */ | |
69 | #define HT_CONFIG_PORT 0x3e6 | |
70 | #define HT_CONFIG(drivea) (u8)(((drivea)->drive_data & 0xff00) >> 8) | |
71 | /* | |
72 | * FIFO + PREFETCH (both a/b-model) | |
73 | */ | |
74 | #define HT_CONFIG_DEFAULT 0x1c /* no prefetch */ | |
75 | /* #define HT_CONFIG_DEFAULT 0x3c */ /* with prefetch */ | |
76 | #define HT_SECONDARY_IF 0x01 | |
77 | #define HT_PREFETCH_MODE 0x20 | |
78 | ||
79 | /* | |
80 | * ht6560b Timing values: | |
81 | * | |
82 | * I reviewed some assembler source listings of htide drivers and found | |
83 | * out how they setup those cycle time interfacing values, as they at Holtek | |
84 | * call them. IDESETUP.COM that is supplied with the drivers figures out | |
85 | * optimal values and fetches those values to drivers. I found out that | |
23579a2a | 86 | * they use Select register to fetch timings to the ide board right after |
1da177e4 LT |
87 | * interface switching. After that it was quite easy to add code to |
88 | * ht6560b.c. | |
89 | * | |
90 | * IDESETUP.COM gave me values 0x24, 0x45, 0xaa, 0xff that worked fine | |
91 | * for hda and hdc. But hdb needed higher values to work, so I guess | |
92 | * that sometimes it is necessary to give higher value than IDESETUP | |
93 | * gives. [see cmd640.c for an extreme example of this. -ml] | |
94 | * | |
95 | * Perhaps I should explain something about these timing values: | |
96 | * The higher nibble of value is the Recovery Time (rt) and the lower nibble | |
97 | * of the value is the Active Time (at). Minimum value 2 is the fastest and | |
98 | * the maximum value 15 is the slowest. Default values should be 15 for both. | |
99 | * So 0x24 means 2 for rt and 4 for at. Each of the drives should have | |
100 | * both values, and IDESETUP gives automatically rt=15 st=15 for CDROMs or | |
101 | * similar. If value is too small there will be all sorts of failures. | |
102 | * | |
103 | * Timing byte consists of | |
104 | * High nibble: Recovery Cycle Time (rt) | |
105 | * The valid values range from 2 to 15. The default is 15. | |
106 | * | |
107 | * Low nibble: Active Cycle Time (at) | |
108 | * The valid values range from 2 to 15. The default is 15. | |
109 | * | |
110 | * You can obtain optimized timing values by running Holtek IDESETUP.COM | |
111 | * for DOS. DOS drivers get their timing values from command line, where | |
112 | * the first value is the Recovery Time and the second value is the | |
113 | * Active Time for each drive. Smaller value gives higher speed. | |
114 | * In case of failures you should probably fall back to a higher value. | |
115 | */ | |
116 | #define HT_TIMING(drivea) (u8)((drivea)->drive_data & 0x00ff) | |
117 | #define HT_TIMING_DEFAULT 0xff | |
118 | ||
119 | /* | |
120 | * This routine handles interface switching for the peculiar hardware design | |
121 | * on the F.G.I./Holtek HT-6560B VLB IDE interface. | |
122 | * The HT-6560B can only enable one IDE port at a time, and requires a | |
123 | * silly sequence (below) whenever we switch between primary and secondary. | |
124 | */ | |
125 | ||
126 | /* | |
127 | * This routine is invoked from ide.c to prepare for access to a given drive. | |
128 | */ | |
129 | static void ht6560b_selectproc (ide_drive_t *drive) | |
130 | { | |
23579a2a | 131 | ide_hwif_t *hwif = drive->hwif; |
1da177e4 LT |
132 | unsigned long flags; |
133 | static u8 current_select = 0; | |
134 | static u8 current_timing = 0; | |
135 | u8 select, timing; | |
136 | ||
137 | local_irq_save(flags); | |
0e7d8d48 | 138 | |
1da177e4 LT |
139 | select = HT_CONFIG(drive); |
140 | timing = HT_TIMING(drive); | |
0e7d8d48 JEG |
141 | |
142 | /* | |
143 | * Need to enforce prefetch sometimes because otherwise | |
144 | * it'll hang (hard). | |
145 | */ | |
146 | if (drive->media != ide_disk || !drive->present) | |
147 | select |= HT_PREFETCH_MODE; | |
148 | ||
1da177e4 LT |
149 | if (select != current_select || timing != current_timing) { |
150 | current_select = select; | |
151 | current_timing = timing; | |
0ecdca26 BZ |
152 | (void)inb(HT_CONFIG_PORT); |
153 | (void)inb(HT_CONFIG_PORT); | |
154 | (void)inb(HT_CONFIG_PORT); | |
155 | (void)inb(HT_CONFIG_PORT); | |
156 | outb(select, HT_CONFIG_PORT); | |
1da177e4 LT |
157 | /* |
158 | * Set timing for this drive: | |
159 | */ | |
23579a2a BZ |
160 | outb(timing, hwif->io_ports[IDE_SELECT_OFFSET]); |
161 | (void)inb(hwif->io_ports[IDE_STATUS_OFFSET]); | |
1da177e4 LT |
162 | #ifdef DEBUG |
163 | printk("ht6560b: %s: select=%#x timing=%#x\n", | |
164 | drive->name, select, timing); | |
165 | #endif | |
166 | } | |
167 | local_irq_restore(flags); | |
168 | } | |
169 | ||
170 | /* | |
171 | * Autodetection and initialization of ht6560b | |
172 | */ | |
173 | static int __init try_to_init_ht6560b(void) | |
174 | { | |
175 | u8 orig_value; | |
176 | int i; | |
177 | ||
178 | /* Autodetect ht6560b */ | |
179 | if ((orig_value = inb(HT_CONFIG_PORT)) == 0xff) | |
180 | return 0; | |
181 | ||
182 | for (i=3;i>0;i--) { | |
183 | outb(0x00, HT_CONFIG_PORT); | |
184 | if (!( (~inb(HT_CONFIG_PORT)) & 0x3f )) { | |
185 | outb(orig_value, HT_CONFIG_PORT); | |
186 | return 0; | |
187 | } | |
188 | } | |
189 | outb(0x00, HT_CONFIG_PORT); | |
190 | if ((~inb(HT_CONFIG_PORT))& 0x3f) { | |
191 | outb(orig_value, HT_CONFIG_PORT); | |
192 | return 0; | |
193 | } | |
194 | /* | |
195 | * Ht6560b autodetected | |
196 | */ | |
197 | outb(HT_CONFIG_DEFAULT, HT_CONFIG_PORT); | |
23579a2a BZ |
198 | outb(HT_TIMING_DEFAULT, 0x1f6); /* Select register */ |
199 | (void)inb(0x1f7); /* Status register */ | |
200 | ||
0e7d8d48 | 201 | printk("ht6560b " HT6560B_VERSION |
1da177e4 LT |
202 | ": chipset detected and initialized" |
203 | #ifdef DEBUG | |
204 | " with debug enabled" | |
205 | #endif | |
0e7d8d48 | 206 | "\n" |
1da177e4 LT |
207 | ); |
208 | return 1; | |
209 | } | |
210 | ||
26bcb879 | 211 | static u8 ht_pio2timings(ide_drive_t *drive, const u8 pio) |
1da177e4 LT |
212 | { |
213 | int active_time, recovery_time; | |
214 | int active_cycles, recovery_cycles; | |
1da177e4 LT |
215 | int bus_speed = system_bus_clock(); |
216 | ||
217 | if (pio) { | |
7dd00083 BZ |
218 | unsigned int cycle_time; |
219 | ||
7dd00083 BZ |
220 | cycle_time = ide_pio_cycle_time(drive, pio); |
221 | ||
1da177e4 LT |
222 | /* |
223 | * Just like opti621.c we try to calculate the | |
224 | * actual cycle time for recovery and activity | |
225 | * according system bus speed. | |
226 | */ | |
227 | active_time = ide_pio_timings[pio].active_time; | |
7dd00083 | 228 | recovery_time = cycle_time |
1da177e4 LT |
229 | - active_time |
230 | - ide_pio_timings[pio].setup_time; | |
231 | /* | |
232 | * Cycle times should be Vesa bus cycles | |
233 | */ | |
234 | active_cycles = (active_time * bus_speed + 999) / 1000; | |
235 | recovery_cycles = (recovery_time * bus_speed + 999) / 1000; | |
236 | /* | |
237 | * Upper and lower limits | |
238 | */ | |
239 | if (active_cycles < 2) active_cycles = 2; | |
240 | if (recovery_cycles < 2) recovery_cycles = 2; | |
241 | if (active_cycles > 15) active_cycles = 15; | |
242 | if (recovery_cycles > 15) recovery_cycles = 0; /* 0==16 */ | |
243 | ||
244 | #ifdef DEBUG | |
245 | printk("ht6560b: drive %s setting pio=%d recovery=%d (%dns) active=%d (%dns)\n", drive->name, pio, recovery_cycles, recovery_time, active_cycles, active_time); | |
246 | #endif | |
247 | ||
248 | return (u8)((recovery_cycles << 4) | active_cycles); | |
249 | } else { | |
250 | ||
251 | #ifdef DEBUG | |
252 | printk("ht6560b: drive %s setting pio=0\n", drive->name); | |
253 | #endif | |
254 | ||
255 | return HT_TIMING_DEFAULT; /* default setting */ | |
256 | } | |
257 | } | |
258 | ||
69e88d2a BZ |
259 | static DEFINE_SPINLOCK(ht6560b_lock); |
260 | ||
1da177e4 LT |
261 | /* |
262 | * Enable/Disable so called prefetch mode | |
263 | */ | |
264 | static void ht_set_prefetch(ide_drive_t *drive, u8 state) | |
265 | { | |
266 | unsigned long flags; | |
267 | int t = HT_PREFETCH_MODE << 8; | |
69e88d2a BZ |
268 | |
269 | spin_lock_irqsave(&ht6560b_lock, flags); | |
270 | ||
1da177e4 LT |
271 | /* |
272 | * Prefetch mode and unmask irq seems to conflict | |
273 | */ | |
274 | if (state) { | |
275 | drive->drive_data |= t; /* enable prefetch mode */ | |
276 | drive->no_unmask = 1; | |
277 | drive->unmask = 0; | |
278 | } else { | |
279 | drive->drive_data &= ~t; /* disable prefetch mode */ | |
280 | drive->no_unmask = 0; | |
281 | } | |
69e88d2a BZ |
282 | |
283 | spin_unlock_irqrestore(&ht6560b_lock, flags); | |
284 | ||
1da177e4 LT |
285 | #ifdef DEBUG |
286 | printk("ht6560b: drive %s prefetch mode %sabled\n", drive->name, (state ? "en" : "dis")); | |
287 | #endif | |
288 | } | |
289 | ||
26bcb879 | 290 | static void ht6560b_set_pio_mode(ide_drive_t *drive, const u8 pio) |
1da177e4 LT |
291 | { |
292 | unsigned long flags; | |
293 | u8 timing; | |
294 | ||
295 | switch (pio) { | |
296 | case 8: /* set prefetch off */ | |
297 | case 9: /* set prefetch on */ | |
298 | ht_set_prefetch(drive, pio & 1); | |
299 | return; | |
300 | } | |
69e88d2a | 301 | |
1da177e4 | 302 | timing = ht_pio2timings(drive, pio); |
69e88d2a BZ |
303 | |
304 | spin_lock_irqsave(&ht6560b_lock, flags); | |
1da177e4 LT |
305 | drive->drive_data &= 0xff00; |
306 | drive->drive_data |= timing; | |
69e88d2a BZ |
307 | spin_unlock_irqrestore(&ht6560b_lock, flags); |
308 | ||
1da177e4 LT |
309 | #ifdef DEBUG |
310 | printk("ht6560b: drive %s tuned to pio mode %#x timing=%#x\n", drive->name, pio, timing); | |
311 | #endif | |
312 | } | |
313 | ||
1f2cf8b0 BZ |
314 | static void __init ht6560b_port_init_devs(ide_hwif_t *hwif) |
315 | { | |
316 | /* Setting default configurations for drives. */ | |
317 | int t = (HT_CONFIG_DEFAULT << 8) | HT_TIMING_DEFAULT; | |
318 | ||
319 | if (hwif->channel) | |
320 | t |= (HT_SECONDARY_IF << 8); | |
321 | ||
322 | hwif->drives[0].drive_data = t; | |
323 | hwif->drives[1].drive_data = t; | |
324 | } | |
325 | ||
84913882 BZ |
326 | int probe_ht6560b = 0; |
327 | ||
328 | module_param_named(probe, probe_ht6560b, bool, 0); | |
329 | MODULE_PARM_DESC(probe, "probe for HT6560B chipset"); | |
330 | ||
ac95beed BZ |
331 | static const struct ide_port_ops ht6560b_port_ops = { |
332 | .port_init_devs = ht6560b_port_init_devs, | |
333 | .set_pio_mode = ht6560b_set_pio_mode, | |
334 | .selectproc = ht6560b_selectproc, | |
335 | }; | |
336 | ||
c413b9b9 BZ |
337 | static const struct ide_port_info ht6560b_port_info __initdata = { |
338 | .chipset = ide_ht6560b, | |
ac95beed | 339 | .port_ops = &ht6560b_port_ops, |
c413b9b9 BZ |
340 | .host_flags = IDE_HFLAG_SERIALIZE | /* is this needed? */ |
341 | IDE_HFLAG_NO_DMA | | |
342 | IDE_HFLAG_NO_AUTOTUNE | | |
343 | IDE_HFLAG_ABUSE_PREFETCH, | |
1a1990f5 | 344 | .pio_mask = ATA_PIO4, |
c413b9b9 BZ |
345 | }; |
346 | ||
ade2daf9 | 347 | static int __init ht6560b_init(void) |
1da177e4 | 348 | { |
84913882 BZ |
349 | if (probe_ht6560b == 0) |
350 | return -ENODEV; | |
351 | ||
2e4ed295 | 352 | if (!request_region(HT_CONFIG_PORT, 1, DRV_NAME)) { |
1da177e4 LT |
353 | printk(KERN_NOTICE "%s: HT_CONFIG_PORT not found\n", |
354 | __FUNCTION__); | |
355 | return -ENODEV; | |
356 | } | |
357 | ||
358 | if (!try_to_init_ht6560b()) { | |
359 | printk(KERN_NOTICE "%s: HBA not found\n", __FUNCTION__); | |
360 | goto release_region; | |
361 | } | |
362 | ||
0bfeee7d | 363 | return ide_legacy_device_add(&ht6560b_port_info, 0); |
1da177e4 LT |
364 | |
365 | release_region: | |
366 | release_region(HT_CONFIG_PORT, 1); | |
367 | return -ENODEV; | |
368 | } | |
369 | ||
1da177e4 | 370 | module_init(ht6560b_init); |
1da177e4 LT |
371 | |
372 | MODULE_AUTHOR("See Local File"); | |
373 | MODULE_DESCRIPTION("HT-6560B EIDE-controller support"); | |
374 | MODULE_LICENSE("GPL"); |