Commit | Line | Data |
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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Copyright (C) 1995-2000 Linus Torvalds & author (see below) |
3 | */ | |
4 | ||
5 | /* | |
1da177e4 LT |
6 | * HT-6560B EIDE-controller support |
7 | * To activate controller support use kernel parameter "ide0=ht6560b". | |
8 | * Use hdparm utility to enable PIO mode support. | |
9 | * | |
10 | * Author: Mikko Ala-Fossi <maf@iki.fi> | |
eb34b2d9 | 11 | * Jan Evert van Grootheest <j.e.van.grootheest@caiway.nl> |
1da177e4 LT |
12 | * |
13 | * Try: http://www.maf.iki.fi/~maf/ht6560b/ | |
14 | */ | |
15 | ||
2e4ed295 | 16 | #define DRV_NAME "ht6560b" |
0e7d8d48 | 17 | #define HT6560B_VERSION "v0.08" |
1da177e4 | 18 | |
1da177e4 | 19 | #include <linux/module.h> |
1da177e4 LT |
20 | #include <linux/types.h> |
21 | #include <linux/kernel.h> | |
22 | #include <linux/delay.h> | |
23 | #include <linux/timer.h> | |
24 | #include <linux/mm.h> | |
25 | #include <linux/ioport.h> | |
26 | #include <linux/blkdev.h> | |
1da177e4 LT |
27 | #include <linux/ide.h> |
28 | #include <linux/init.h> | |
29 | ||
30 | #include <asm/io.h> | |
31 | ||
32 | /* #define DEBUG */ /* remove comments for DEBUG messages */ | |
33 | ||
34 | /* | |
35 | * The special i/o-port that HT-6560B uses to configuration: | |
36 | * bit0 (0x01): "1" selects secondary interface | |
37 | * bit2 (0x04): "1" enables FIFO function | |
38 | * bit5 (0x20): "1" enables prefetched data read function (???) | |
39 | * | |
40 | * The special i/o-port that HT-6560A uses to configuration: | |
41 | * bit0 (0x01): "1" selects secondary interface | |
42 | * bit1 (0x02): "1" enables prefetched data read function | |
43 | * bit2 (0x04): "0" enables multi-master system (?) | |
44 | * bit3 (0x08): "1" 3 cycle time, "0" 2 cycle time (?) | |
45 | */ | |
46 | #define HT_CONFIG_PORT 0x3e6 | |
47 | #define HT_CONFIG(drivea) (u8)(((drivea)->drive_data & 0xff00) >> 8) | |
48 | /* | |
49 | * FIFO + PREFETCH (both a/b-model) | |
50 | */ | |
51 | #define HT_CONFIG_DEFAULT 0x1c /* no prefetch */ | |
52 | /* #define HT_CONFIG_DEFAULT 0x3c */ /* with prefetch */ | |
53 | #define HT_SECONDARY_IF 0x01 | |
54 | #define HT_PREFETCH_MODE 0x20 | |
55 | ||
56 | /* | |
57 | * ht6560b Timing values: | |
58 | * | |
59 | * I reviewed some assembler source listings of htide drivers and found | |
60 | * out how they setup those cycle time interfacing values, as they at Holtek | |
61 | * call them. IDESETUP.COM that is supplied with the drivers figures out | |
62 | * optimal values and fetches those values to drivers. I found out that | |
23579a2a | 63 | * they use Select register to fetch timings to the ide board right after |
1da177e4 LT |
64 | * interface switching. After that it was quite easy to add code to |
65 | * ht6560b.c. | |
66 | * | |
67 | * IDESETUP.COM gave me values 0x24, 0x45, 0xaa, 0xff that worked fine | |
68 | * for hda and hdc. But hdb needed higher values to work, so I guess | |
69 | * that sometimes it is necessary to give higher value than IDESETUP | |
70 | * gives. [see cmd640.c for an extreme example of this. -ml] | |
71 | * | |
72 | * Perhaps I should explain something about these timing values: | |
73 | * The higher nibble of value is the Recovery Time (rt) and the lower nibble | |
74 | * of the value is the Active Time (at). Minimum value 2 is the fastest and | |
75 | * the maximum value 15 is the slowest. Default values should be 15 for both. | |
76 | * So 0x24 means 2 for rt and 4 for at. Each of the drives should have | |
77 | * both values, and IDESETUP gives automatically rt=15 st=15 for CDROMs or | |
78 | * similar. If value is too small there will be all sorts of failures. | |
79 | * | |
80 | * Timing byte consists of | |
81 | * High nibble: Recovery Cycle Time (rt) | |
82 | * The valid values range from 2 to 15. The default is 15. | |
83 | * | |
84 | * Low nibble: Active Cycle Time (at) | |
85 | * The valid values range from 2 to 15. The default is 15. | |
86 | * | |
87 | * You can obtain optimized timing values by running Holtek IDESETUP.COM | |
88 | * for DOS. DOS drivers get their timing values from command line, where | |
89 | * the first value is the Recovery Time and the second value is the | |
90 | * Active Time for each drive. Smaller value gives higher speed. | |
91 | * In case of failures you should probably fall back to a higher value. | |
92 | */ | |
93 | #define HT_TIMING(drivea) (u8)((drivea)->drive_data & 0x00ff) | |
94 | #define HT_TIMING_DEFAULT 0xff | |
95 | ||
96 | /* | |
97 | * This routine handles interface switching for the peculiar hardware design | |
98 | * on the F.G.I./Holtek HT-6560B VLB IDE interface. | |
99 | * The HT-6560B can only enable one IDE port at a time, and requires a | |
100 | * silly sequence (below) whenever we switch between primary and secondary. | |
101 | */ | |
102 | ||
103 | /* | |
104 | * This routine is invoked from ide.c to prepare for access to a given drive. | |
105 | */ | |
106 | static void ht6560b_selectproc (ide_drive_t *drive) | |
107 | { | |
23579a2a | 108 | ide_hwif_t *hwif = drive->hwif; |
1da177e4 LT |
109 | unsigned long flags; |
110 | static u8 current_select = 0; | |
111 | static u8 current_timing = 0; | |
112 | u8 select, timing; | |
113 | ||
114 | local_irq_save(flags); | |
0e7d8d48 | 115 | |
1da177e4 LT |
116 | select = HT_CONFIG(drive); |
117 | timing = HT_TIMING(drive); | |
0e7d8d48 JEG |
118 | |
119 | /* | |
120 | * Need to enforce prefetch sometimes because otherwise | |
121 | * it'll hang (hard). | |
122 | */ | |
97100fc8 BZ |
123 | if (drive->media != ide_disk || |
124 | (drive->dev_flags & IDE_DFLAG_PRESENT) == 0) | |
0e7d8d48 JEG |
125 | select |= HT_PREFETCH_MODE; |
126 | ||
1da177e4 LT |
127 | if (select != current_select || timing != current_timing) { |
128 | current_select = select; | |
129 | current_timing = timing; | |
0ecdca26 BZ |
130 | (void)inb(HT_CONFIG_PORT); |
131 | (void)inb(HT_CONFIG_PORT); | |
132 | (void)inb(HT_CONFIG_PORT); | |
133 | (void)inb(HT_CONFIG_PORT); | |
134 | outb(select, HT_CONFIG_PORT); | |
1da177e4 LT |
135 | /* |
136 | * Set timing for this drive: | |
137 | */ | |
4c3032d8 BZ |
138 | outb(timing, hwif->io_ports.device_addr); |
139 | (void)inb(hwif->io_ports.status_addr); | |
1da177e4 LT |
140 | #ifdef DEBUG |
141 | printk("ht6560b: %s: select=%#x timing=%#x\n", | |
142 | drive->name, select, timing); | |
143 | #endif | |
144 | } | |
145 | local_irq_restore(flags); | |
146 | } | |
147 | ||
148 | /* | |
149 | * Autodetection and initialization of ht6560b | |
150 | */ | |
151 | static int __init try_to_init_ht6560b(void) | |
152 | { | |
153 | u8 orig_value; | |
154 | int i; | |
155 | ||
156 | /* Autodetect ht6560b */ | |
157 | if ((orig_value = inb(HT_CONFIG_PORT)) == 0xff) | |
158 | return 0; | |
159 | ||
160 | for (i=3;i>0;i--) { | |
161 | outb(0x00, HT_CONFIG_PORT); | |
162 | if (!( (~inb(HT_CONFIG_PORT)) & 0x3f )) { | |
163 | outb(orig_value, HT_CONFIG_PORT); | |
164 | return 0; | |
165 | } | |
166 | } | |
167 | outb(0x00, HT_CONFIG_PORT); | |
168 | if ((~inb(HT_CONFIG_PORT))& 0x3f) { | |
169 | outb(orig_value, HT_CONFIG_PORT); | |
170 | return 0; | |
171 | } | |
172 | /* | |
173 | * Ht6560b autodetected | |
174 | */ | |
175 | outb(HT_CONFIG_DEFAULT, HT_CONFIG_PORT); | |
23579a2a BZ |
176 | outb(HT_TIMING_DEFAULT, 0x1f6); /* Select register */ |
177 | (void)inb(0x1f7); /* Status register */ | |
178 | ||
0e7d8d48 | 179 | printk("ht6560b " HT6560B_VERSION |
1da177e4 LT |
180 | ": chipset detected and initialized" |
181 | #ifdef DEBUG | |
182 | " with debug enabled" | |
183 | #endif | |
0e7d8d48 | 184 | "\n" |
1da177e4 LT |
185 | ); |
186 | return 1; | |
187 | } | |
188 | ||
26bcb879 | 189 | static u8 ht_pio2timings(ide_drive_t *drive, const u8 pio) |
1da177e4 LT |
190 | { |
191 | int active_time, recovery_time; | |
192 | int active_cycles, recovery_cycles; | |
30e5ee4d | 193 | int bus_speed = ide_vlb_clk ? ide_vlb_clk : 50; |
ebae41a5 | 194 | |
1da177e4 | 195 | if (pio) { |
7dd00083 | 196 | unsigned int cycle_time; |
b32b76f7 | 197 | struct ide_timing *t = ide_timing_find_mode(XFER_PIO_0 + pio); |
7dd00083 | 198 | |
7dd00083 BZ |
199 | cycle_time = ide_pio_cycle_time(drive, pio); |
200 | ||
1da177e4 LT |
201 | /* |
202 | * Just like opti621.c we try to calculate the | |
203 | * actual cycle time for recovery and activity | |
204 | * according system bus speed. | |
205 | */ | |
b32b76f7 BZ |
206 | active_time = t->active; |
207 | recovery_time = cycle_time - active_time - t->setup; | |
1da177e4 LT |
208 | /* |
209 | * Cycle times should be Vesa bus cycles | |
210 | */ | |
211 | active_cycles = (active_time * bus_speed + 999) / 1000; | |
212 | recovery_cycles = (recovery_time * bus_speed + 999) / 1000; | |
213 | /* | |
214 | * Upper and lower limits | |
215 | */ | |
216 | if (active_cycles < 2) active_cycles = 2; | |
217 | if (recovery_cycles < 2) recovery_cycles = 2; | |
218 | if (active_cycles > 15) active_cycles = 15; | |
219 | if (recovery_cycles > 15) recovery_cycles = 0; /* 0==16 */ | |
220 | ||
221 | #ifdef DEBUG | |
222 | 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); | |
223 | #endif | |
224 | ||
225 | return (u8)((recovery_cycles << 4) | active_cycles); | |
226 | } else { | |
227 | ||
228 | #ifdef DEBUG | |
229 | printk("ht6560b: drive %s setting pio=0\n", drive->name); | |
230 | #endif | |
231 | ||
232 | return HT_TIMING_DEFAULT; /* default setting */ | |
233 | } | |
234 | } | |
235 | ||
69e88d2a BZ |
236 | static DEFINE_SPINLOCK(ht6560b_lock); |
237 | ||
1da177e4 LT |
238 | /* |
239 | * Enable/Disable so called prefetch mode | |
240 | */ | |
241 | static void ht_set_prefetch(ide_drive_t *drive, u8 state) | |
242 | { | |
243 | unsigned long flags; | |
244 | int t = HT_PREFETCH_MODE << 8; | |
69e88d2a BZ |
245 | |
246 | spin_lock_irqsave(&ht6560b_lock, flags); | |
247 | ||
1da177e4 LT |
248 | /* |
249 | * Prefetch mode and unmask irq seems to conflict | |
250 | */ | |
251 | if (state) { | |
252 | drive->drive_data |= t; /* enable prefetch mode */ | |
97100fc8 BZ |
253 | drive->dev_flags |= IDE_DFLAG_NO_UNMASK; |
254 | drive->dev_flags &= ~IDE_DFLAG_UNMASK; | |
1da177e4 LT |
255 | } else { |
256 | drive->drive_data &= ~t; /* disable prefetch mode */ | |
97100fc8 | 257 | drive->dev_flags &= ~IDE_DFLAG_NO_UNMASK; |
1da177e4 | 258 | } |
69e88d2a BZ |
259 | |
260 | spin_unlock_irqrestore(&ht6560b_lock, flags); | |
261 | ||
1da177e4 LT |
262 | #ifdef DEBUG |
263 | printk("ht6560b: drive %s prefetch mode %sabled\n", drive->name, (state ? "en" : "dis")); | |
264 | #endif | |
265 | } | |
266 | ||
26bcb879 | 267 | static void ht6560b_set_pio_mode(ide_drive_t *drive, const u8 pio) |
1da177e4 LT |
268 | { |
269 | unsigned long flags; | |
270 | u8 timing; | |
271 | ||
272 | switch (pio) { | |
273 | case 8: /* set prefetch off */ | |
274 | case 9: /* set prefetch on */ | |
275 | ht_set_prefetch(drive, pio & 1); | |
276 | return; | |
277 | } | |
69e88d2a | 278 | |
1da177e4 | 279 | timing = ht_pio2timings(drive, pio); |
69e88d2a BZ |
280 | |
281 | spin_lock_irqsave(&ht6560b_lock, flags); | |
1da177e4 LT |
282 | drive->drive_data &= 0xff00; |
283 | drive->drive_data |= timing; | |
69e88d2a BZ |
284 | spin_unlock_irqrestore(&ht6560b_lock, flags); |
285 | ||
1da177e4 LT |
286 | #ifdef DEBUG |
287 | printk("ht6560b: drive %s tuned to pio mode %#x timing=%#x\n", drive->name, pio, timing); | |
288 | #endif | |
289 | } | |
290 | ||
e6d95bd1 | 291 | static void __init ht6560b_init_dev(ide_drive_t *drive) |
1f2cf8b0 | 292 | { |
e6d95bd1 | 293 | ide_hwif_t *hwif = drive->hwif; |
1f2cf8b0 BZ |
294 | /* Setting default configurations for drives. */ |
295 | int t = (HT_CONFIG_DEFAULT << 8) | HT_TIMING_DEFAULT; | |
296 | ||
297 | if (hwif->channel) | |
298 | t |= (HT_SECONDARY_IF << 8); | |
299 | ||
e6d95bd1 | 300 | drive->drive_data = t; |
1f2cf8b0 BZ |
301 | } |
302 | ||
ef87f8d0 | 303 | static int probe_ht6560b; |
84913882 BZ |
304 | |
305 | module_param_named(probe, probe_ht6560b, bool, 0); | |
306 | MODULE_PARM_DESC(probe, "probe for HT6560B chipset"); | |
307 | ||
ac95beed | 308 | static const struct ide_port_ops ht6560b_port_ops = { |
e6d95bd1 | 309 | .init_dev = ht6560b_init_dev, |
ac95beed BZ |
310 | .set_pio_mode = ht6560b_set_pio_mode, |
311 | .selectproc = ht6560b_selectproc, | |
312 | }; | |
313 | ||
c413b9b9 | 314 | static const struct ide_port_info ht6560b_port_info __initdata = { |
d92f1a28 | 315 | .name = DRV_NAME, |
c413b9b9 | 316 | .chipset = ide_ht6560b, |
ac95beed | 317 | .port_ops = &ht6560b_port_ops, |
c413b9b9 BZ |
318 | .host_flags = IDE_HFLAG_SERIALIZE | /* is this needed? */ |
319 | IDE_HFLAG_NO_DMA | | |
c413b9b9 | 320 | IDE_HFLAG_ABUSE_PREFETCH, |
1a1990f5 | 321 | .pio_mask = ATA_PIO4, |
c413b9b9 BZ |
322 | }; |
323 | ||
ade2daf9 | 324 | static int __init ht6560b_init(void) |
1da177e4 | 325 | { |
84913882 BZ |
326 | if (probe_ht6560b == 0) |
327 | return -ENODEV; | |
328 | ||
2e4ed295 | 329 | if (!request_region(HT_CONFIG_PORT, 1, DRV_NAME)) { |
1da177e4 | 330 | printk(KERN_NOTICE "%s: HT_CONFIG_PORT not found\n", |
eb63963a | 331 | __func__); |
1da177e4 LT |
332 | return -ENODEV; |
333 | } | |
334 | ||
335 | if (!try_to_init_ht6560b()) { | |
eb63963a | 336 | printk(KERN_NOTICE "%s: HBA not found\n", __func__); |
1da177e4 LT |
337 | goto release_region; |
338 | } | |
339 | ||
0bfeee7d | 340 | return ide_legacy_device_add(&ht6560b_port_info, 0); |
1da177e4 LT |
341 | |
342 | release_region: | |
343 | release_region(HT_CONFIG_PORT, 1); | |
344 | return -ENODEV; | |
345 | } | |
346 | ||
1da177e4 | 347 | module_init(ht6560b_init); |
1da177e4 LT |
348 | |
349 | MODULE_AUTHOR("See Local File"); | |
350 | MODULE_DESCRIPTION("HT-6560B EIDE-controller support"); | |
351 | MODULE_LICENSE("GPL"); |