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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 | * | |
24 | * | |
25 | * HT-6560B EIDE-controller support | |
26 | * To activate controller support use kernel parameter "ide0=ht6560b". | |
27 | * Use hdparm utility to enable PIO mode support. | |
28 | * | |
29 | * Author: Mikko Ala-Fossi <maf@iki.fi> | |
30 | * Jan Evert van Grootheest <janevert@iae.nl> | |
31 | * | |
32 | * Try: http://www.maf.iki.fi/~maf/ht6560b/ | |
33 | */ | |
34 | ||
35 | #define HT6560B_VERSION "v0.07" | |
36 | ||
1da177e4 | 37 | #include <linux/module.h> |
1da177e4 LT |
38 | #include <linux/types.h> |
39 | #include <linux/kernel.h> | |
40 | #include <linux/delay.h> | |
41 | #include <linux/timer.h> | |
42 | #include <linux/mm.h> | |
43 | #include <linux/ioport.h> | |
44 | #include <linux/blkdev.h> | |
45 | #include <linux/hdreg.h> | |
46 | #include <linux/ide.h> | |
47 | #include <linux/init.h> | |
48 | ||
49 | #include <asm/io.h> | |
50 | ||
51 | /* #define DEBUG */ /* remove comments for DEBUG messages */ | |
52 | ||
53 | /* | |
54 | * The special i/o-port that HT-6560B uses to configuration: | |
55 | * bit0 (0x01): "1" selects secondary interface | |
56 | * bit2 (0x04): "1" enables FIFO function | |
57 | * bit5 (0x20): "1" enables prefetched data read function (???) | |
58 | * | |
59 | * The special i/o-port that HT-6560A uses to configuration: | |
60 | * bit0 (0x01): "1" selects secondary interface | |
61 | * bit1 (0x02): "1" enables prefetched data read function | |
62 | * bit2 (0x04): "0" enables multi-master system (?) | |
63 | * bit3 (0x08): "1" 3 cycle time, "0" 2 cycle time (?) | |
64 | */ | |
65 | #define HT_CONFIG_PORT 0x3e6 | |
66 | #define HT_CONFIG(drivea) (u8)(((drivea)->drive_data & 0xff00) >> 8) | |
67 | /* | |
68 | * FIFO + PREFETCH (both a/b-model) | |
69 | */ | |
70 | #define HT_CONFIG_DEFAULT 0x1c /* no prefetch */ | |
71 | /* #define HT_CONFIG_DEFAULT 0x3c */ /* with prefetch */ | |
72 | #define HT_SECONDARY_IF 0x01 | |
73 | #define HT_PREFETCH_MODE 0x20 | |
74 | ||
75 | /* | |
76 | * ht6560b Timing values: | |
77 | * | |
78 | * I reviewed some assembler source listings of htide drivers and found | |
79 | * out how they setup those cycle time interfacing values, as they at Holtek | |
80 | * call them. IDESETUP.COM that is supplied with the drivers figures out | |
81 | * optimal values and fetches those values to drivers. I found out that | |
82 | * they use IDE_SELECT_REG to fetch timings to the ide board right after | |
83 | * interface switching. After that it was quite easy to add code to | |
84 | * ht6560b.c. | |
85 | * | |
86 | * IDESETUP.COM gave me values 0x24, 0x45, 0xaa, 0xff that worked fine | |
87 | * for hda and hdc. But hdb needed higher values to work, so I guess | |
88 | * that sometimes it is necessary to give higher value than IDESETUP | |
89 | * gives. [see cmd640.c for an extreme example of this. -ml] | |
90 | * | |
91 | * Perhaps I should explain something about these timing values: | |
92 | * The higher nibble of value is the Recovery Time (rt) and the lower nibble | |
93 | * of the value is the Active Time (at). Minimum value 2 is the fastest and | |
94 | * the maximum value 15 is the slowest. Default values should be 15 for both. | |
95 | * So 0x24 means 2 for rt and 4 for at. Each of the drives should have | |
96 | * both values, and IDESETUP gives automatically rt=15 st=15 for CDROMs or | |
97 | * similar. If value is too small there will be all sorts of failures. | |
98 | * | |
99 | * Timing byte consists of | |
100 | * High nibble: Recovery Cycle Time (rt) | |
101 | * The valid values range from 2 to 15. The default is 15. | |
102 | * | |
103 | * Low nibble: Active Cycle Time (at) | |
104 | * The valid values range from 2 to 15. The default is 15. | |
105 | * | |
106 | * You can obtain optimized timing values by running Holtek IDESETUP.COM | |
107 | * for DOS. DOS drivers get their timing values from command line, where | |
108 | * the first value is the Recovery Time and the second value is the | |
109 | * Active Time for each drive. Smaller value gives higher speed. | |
110 | * In case of failures you should probably fall back to a higher value. | |
111 | */ | |
112 | #define HT_TIMING(drivea) (u8)((drivea)->drive_data & 0x00ff) | |
113 | #define HT_TIMING_DEFAULT 0xff | |
114 | ||
115 | /* | |
116 | * This routine handles interface switching for the peculiar hardware design | |
117 | * on the F.G.I./Holtek HT-6560B VLB IDE interface. | |
118 | * The HT-6560B can only enable one IDE port at a time, and requires a | |
119 | * silly sequence (below) whenever we switch between primary and secondary. | |
120 | */ | |
121 | ||
122 | /* | |
123 | * This routine is invoked from ide.c to prepare for access to a given drive. | |
124 | */ | |
125 | static void ht6560b_selectproc (ide_drive_t *drive) | |
126 | { | |
127 | unsigned long flags; | |
128 | static u8 current_select = 0; | |
129 | static u8 current_timing = 0; | |
130 | u8 select, timing; | |
131 | ||
132 | local_irq_save(flags); | |
133 | ||
134 | select = HT_CONFIG(drive); | |
135 | timing = HT_TIMING(drive); | |
136 | ||
137 | if (select != current_select || timing != current_timing) { | |
138 | current_select = select; | |
139 | current_timing = timing; | |
140 | if (drive->media != ide_disk || !drive->present) | |
141 | select |= HT_PREFETCH_MODE; | |
0ecdca26 BZ |
142 | (void)inb(HT_CONFIG_PORT); |
143 | (void)inb(HT_CONFIG_PORT); | |
144 | (void)inb(HT_CONFIG_PORT); | |
145 | (void)inb(HT_CONFIG_PORT); | |
146 | outb(select, HT_CONFIG_PORT); | |
1da177e4 LT |
147 | /* |
148 | * Set timing for this drive: | |
149 | */ | |
0ecdca26 BZ |
150 | outb(timing, IDE_SELECT_REG); |
151 | (void)inb(IDE_STATUS_REG); | |
1da177e4 LT |
152 | #ifdef DEBUG |
153 | printk("ht6560b: %s: select=%#x timing=%#x\n", | |
154 | drive->name, select, timing); | |
155 | #endif | |
156 | } | |
157 | local_irq_restore(flags); | |
158 | } | |
159 | ||
160 | /* | |
161 | * Autodetection and initialization of ht6560b | |
162 | */ | |
163 | static int __init try_to_init_ht6560b(void) | |
164 | { | |
165 | u8 orig_value; | |
166 | int i; | |
167 | ||
168 | /* Autodetect ht6560b */ | |
169 | if ((orig_value = inb(HT_CONFIG_PORT)) == 0xff) | |
170 | return 0; | |
171 | ||
172 | for (i=3;i>0;i--) { | |
173 | outb(0x00, HT_CONFIG_PORT); | |
174 | if (!( (~inb(HT_CONFIG_PORT)) & 0x3f )) { | |
175 | outb(orig_value, HT_CONFIG_PORT); | |
176 | return 0; | |
177 | } | |
178 | } | |
179 | outb(0x00, HT_CONFIG_PORT); | |
180 | if ((~inb(HT_CONFIG_PORT))& 0x3f) { | |
181 | outb(orig_value, HT_CONFIG_PORT); | |
182 | return 0; | |
183 | } | |
184 | /* | |
185 | * Ht6560b autodetected | |
186 | */ | |
187 | outb(HT_CONFIG_DEFAULT, HT_CONFIG_PORT); | |
188 | outb(HT_TIMING_DEFAULT, 0x1f6); /* IDE_SELECT_REG */ | |
189 | (void) inb(0x1f7); /* IDE_STATUS_REG */ | |
190 | ||
191 | printk("\nht6560b " HT6560B_VERSION | |
192 | ": chipset detected and initialized" | |
193 | #ifdef DEBUG | |
194 | " with debug enabled" | |
195 | #endif | |
196 | ); | |
197 | return 1; | |
198 | } | |
199 | ||
26bcb879 | 200 | static u8 ht_pio2timings(ide_drive_t *drive, const u8 pio) |
1da177e4 LT |
201 | { |
202 | int active_time, recovery_time; | |
203 | int active_cycles, recovery_cycles; | |
1da177e4 LT |
204 | int bus_speed = system_bus_clock(); |
205 | ||
206 | if (pio) { | |
7dd00083 BZ |
207 | unsigned int cycle_time; |
208 | ||
7dd00083 BZ |
209 | cycle_time = ide_pio_cycle_time(drive, pio); |
210 | ||
1da177e4 LT |
211 | /* |
212 | * Just like opti621.c we try to calculate the | |
213 | * actual cycle time for recovery and activity | |
214 | * according system bus speed. | |
215 | */ | |
216 | active_time = ide_pio_timings[pio].active_time; | |
7dd00083 | 217 | recovery_time = cycle_time |
1da177e4 LT |
218 | - active_time |
219 | - ide_pio_timings[pio].setup_time; | |
220 | /* | |
221 | * Cycle times should be Vesa bus cycles | |
222 | */ | |
223 | active_cycles = (active_time * bus_speed + 999) / 1000; | |
224 | recovery_cycles = (recovery_time * bus_speed + 999) / 1000; | |
225 | /* | |
226 | * Upper and lower limits | |
227 | */ | |
228 | if (active_cycles < 2) active_cycles = 2; | |
229 | if (recovery_cycles < 2) recovery_cycles = 2; | |
230 | if (active_cycles > 15) active_cycles = 15; | |
231 | if (recovery_cycles > 15) recovery_cycles = 0; /* 0==16 */ | |
232 | ||
233 | #ifdef DEBUG | |
234 | 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); | |
235 | #endif | |
236 | ||
237 | return (u8)((recovery_cycles << 4) | active_cycles); | |
238 | } else { | |
239 | ||
240 | #ifdef DEBUG | |
241 | printk("ht6560b: drive %s setting pio=0\n", drive->name); | |
242 | #endif | |
243 | ||
244 | return HT_TIMING_DEFAULT; /* default setting */ | |
245 | } | |
246 | } | |
247 | ||
69e88d2a BZ |
248 | static DEFINE_SPINLOCK(ht6560b_lock); |
249 | ||
1da177e4 LT |
250 | /* |
251 | * Enable/Disable so called prefetch mode | |
252 | */ | |
253 | static void ht_set_prefetch(ide_drive_t *drive, u8 state) | |
254 | { | |
255 | unsigned long flags; | |
256 | int t = HT_PREFETCH_MODE << 8; | |
69e88d2a BZ |
257 | |
258 | spin_lock_irqsave(&ht6560b_lock, flags); | |
259 | ||
1da177e4 LT |
260 | /* |
261 | * Prefetch mode and unmask irq seems to conflict | |
262 | */ | |
263 | if (state) { | |
264 | drive->drive_data |= t; /* enable prefetch mode */ | |
265 | drive->no_unmask = 1; | |
266 | drive->unmask = 0; | |
267 | } else { | |
268 | drive->drive_data &= ~t; /* disable prefetch mode */ | |
269 | drive->no_unmask = 0; | |
270 | } | |
69e88d2a BZ |
271 | |
272 | spin_unlock_irqrestore(&ht6560b_lock, flags); | |
273 | ||
1da177e4 LT |
274 | #ifdef DEBUG |
275 | printk("ht6560b: drive %s prefetch mode %sabled\n", drive->name, (state ? "en" : "dis")); | |
276 | #endif | |
277 | } | |
278 | ||
26bcb879 | 279 | static void ht6560b_set_pio_mode(ide_drive_t *drive, const u8 pio) |
1da177e4 LT |
280 | { |
281 | unsigned long flags; | |
282 | u8 timing; | |
283 | ||
284 | switch (pio) { | |
285 | case 8: /* set prefetch off */ | |
286 | case 9: /* set prefetch on */ | |
287 | ht_set_prefetch(drive, pio & 1); | |
288 | return; | |
289 | } | |
69e88d2a | 290 | |
1da177e4 | 291 | timing = ht_pio2timings(drive, pio); |
69e88d2a BZ |
292 | |
293 | spin_lock_irqsave(&ht6560b_lock, flags); | |
1da177e4 LT |
294 | drive->drive_data &= 0xff00; |
295 | drive->drive_data |= timing; | |
69e88d2a BZ |
296 | spin_unlock_irqrestore(&ht6560b_lock, flags); |
297 | ||
1da177e4 LT |
298 | #ifdef DEBUG |
299 | printk("ht6560b: drive %s tuned to pio mode %#x timing=%#x\n", drive->name, pio, timing); | |
300 | #endif | |
301 | } | |
302 | ||
1f2cf8b0 BZ |
303 | static void __init ht6560b_port_init_devs(ide_hwif_t *hwif) |
304 | { | |
305 | /* Setting default configurations for drives. */ | |
306 | int t = (HT_CONFIG_DEFAULT << 8) | HT_TIMING_DEFAULT; | |
307 | ||
308 | if (hwif->channel) | |
309 | t |= (HT_SECONDARY_IF << 8); | |
310 | ||
311 | hwif->drives[0].drive_data = t; | |
312 | hwif->drives[1].drive_data = t; | |
313 | } | |
314 | ||
84913882 BZ |
315 | int probe_ht6560b = 0; |
316 | ||
317 | module_param_named(probe, probe_ht6560b, bool, 0); | |
318 | MODULE_PARM_DESC(probe, "probe for HT6560B chipset"); | |
319 | ||
c413b9b9 BZ |
320 | static const struct ide_port_info ht6560b_port_info __initdata = { |
321 | .chipset = ide_ht6560b, | |
322 | .host_flags = IDE_HFLAG_SERIALIZE | /* is this needed? */ | |
323 | IDE_HFLAG_NO_DMA | | |
324 | IDE_HFLAG_NO_AUTOTUNE | | |
325 | IDE_HFLAG_ABUSE_PREFETCH, | |
326 | .pio_mask = ATA_PIO5, | |
327 | }; | |
328 | ||
ade2daf9 | 329 | static int __init ht6560b_init(void) |
1da177e4 LT |
330 | { |
331 | ide_hwif_t *hwif, *mate; | |
8447d9d5 | 332 | static u8 idx[4] = { 0, 1, 0xff, 0xff }; |
1da177e4 | 333 | |
84913882 BZ |
334 | if (probe_ht6560b == 0) |
335 | return -ENODEV; | |
336 | ||
1da177e4 LT |
337 | hwif = &ide_hwifs[0]; |
338 | mate = &ide_hwifs[1]; | |
339 | ||
340 | if (!request_region(HT_CONFIG_PORT, 1, hwif->name)) { | |
341 | printk(KERN_NOTICE "%s: HT_CONFIG_PORT not found\n", | |
342 | __FUNCTION__); | |
343 | return -ENODEV; | |
344 | } | |
345 | ||
346 | if (!try_to_init_ht6560b()) { | |
347 | printk(KERN_NOTICE "%s: HBA not found\n", __FUNCTION__); | |
348 | goto release_region; | |
349 | } | |
350 | ||
1da177e4 | 351 | hwif->selectproc = &ht6560b_selectproc; |
26bcb879 | 352 | hwif->set_pio_mode = &ht6560b_set_pio_mode; |
1da177e4 | 353 | |
1da177e4 | 354 | mate->selectproc = &ht6560b_selectproc; |
26bcb879 | 355 | mate->set_pio_mode = &ht6560b_set_pio_mode; |
1da177e4 | 356 | |
1f2cf8b0 BZ |
357 | hwif->port_init_devs = ht6560b_port_init_devs; |
358 | mate->port_init_devs = ht6560b_port_init_devs; | |
1da177e4 | 359 | |
c413b9b9 | 360 | ide_device_add(idx, &ht6560b_port_info); |
1da177e4 LT |
361 | |
362 | return 0; | |
363 | ||
364 | release_region: | |
365 | release_region(HT_CONFIG_PORT, 1); | |
366 | return -ENODEV; | |
367 | } | |
368 | ||
1da177e4 | 369 | module_init(ht6560b_init); |
1da177e4 LT |
370 | |
371 | MODULE_AUTHOR("See Local File"); | |
372 | MODULE_DESCRIPTION("HT-6560B EIDE-controller support"); | |
373 | MODULE_LICENSE("GPL"); |