2 * Copyright (C) 1995-2000 Linus Torvalds & author (see below)
7 * Version 0.01 Initial version hacked out of ide.c
9 * Version 0.02 Added support for PIO modes, auto-tune
11 * Version 0.03 Some cleanups
13 * Version 0.05 PIO mode cycle timings auto-tune using bus-speed
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
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.
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.
29 * Author: Mikko Ala-Fossi <maf@iki.fi>
30 * Jan Evert van Grootheest <janevert@iae.nl>
32 * Try: http://www.maf.iki.fi/~maf/ht6560b/
35 #define HT6560B_VERSION "v0.07"
37 #include <linux/module.h>
38 #include <linux/types.h>
39 #include <linux/kernel.h>
40 #include <linux/delay.h>
41 #include <linux/timer.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>
51 /* #define DEBUG */ /* remove comments for DEBUG messages */
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 (???)
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 (?)
65 #define HT_CONFIG_PORT 0x3e6
66 #define HT_CONFIG(drivea) (u8)(((drivea)->drive_data & 0xff00) >> 8)
68 * FIFO + PREFETCH (both a/b-model)
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
76 * ht6560b Timing values:
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
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]
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.
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.
103 * Low nibble: Active Cycle Time (at)
104 * The valid values range from 2 to 15. The default is 15.
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.
112 #define HT_TIMING(drivea) (u8)((drivea)->drive_data & 0x00ff)
113 #define HT_TIMING_DEFAULT 0xff
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.
123 * This routine is invoked from ide.c to prepare for access to a given drive.
125 static void ht6560b_selectproc (ide_drive_t *drive)
128 static u8 current_select = 0;
129 static u8 current_timing = 0;
132 local_irq_save(flags);
134 select = HT_CONFIG(drive);
135 timing = HT_TIMING(drive);
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;
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);
148 * Set timing for this drive:
150 outb(timing, IDE_SELECT_REG);
151 (void)inb(IDE_STATUS_REG);
153 printk("ht6560b: %s: select=%#x timing=%#x\n",
154 drive->name, select, timing);
157 local_irq_restore(flags);
161 * Autodetection and initialization of ht6560b
163 static int __init try_to_init_ht6560b(void)
168 /* Autodetect ht6560b */
169 if ((orig_value = inb(HT_CONFIG_PORT)) == 0xff)
173 outb(0x00, HT_CONFIG_PORT);
174 if (!( (~inb(HT_CONFIG_PORT)) & 0x3f )) {
175 outb(orig_value, HT_CONFIG_PORT);
179 outb(0x00, HT_CONFIG_PORT);
180 if ((~inb(HT_CONFIG_PORT))& 0x3f) {
181 outb(orig_value, HT_CONFIG_PORT);
185 * Ht6560b autodetected
187 outb(HT_CONFIG_DEFAULT, HT_CONFIG_PORT);
188 outb(HT_TIMING_DEFAULT, 0x1f6); /* IDE_SELECT_REG */
189 (void) inb(0x1f7); /* IDE_STATUS_REG */
191 printk("\nht6560b " HT6560B_VERSION
192 ": chipset detected and initialized"
194 " with debug enabled"
200 static u8 ht_pio2timings(ide_drive_t *drive, const u8 pio)
202 int active_time, recovery_time;
203 int active_cycles, recovery_cycles;
204 int bus_speed = system_bus_clock();
207 unsigned int cycle_time;
209 cycle_time = ide_pio_cycle_time(drive, pio);
212 * Just like opti621.c we try to calculate the
213 * actual cycle time for recovery and activity
214 * according system bus speed.
216 active_time = ide_pio_timings[pio].active_time;
217 recovery_time = cycle_time
219 - ide_pio_timings[pio].setup_time;
221 * Cycle times should be Vesa bus cycles
223 active_cycles = (active_time * bus_speed + 999) / 1000;
224 recovery_cycles = (recovery_time * bus_speed + 999) / 1000;
226 * Upper and lower limits
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 */
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);
237 return (u8)((recovery_cycles << 4) | active_cycles);
241 printk("ht6560b: drive %s setting pio=0\n", drive->name);
244 return HT_TIMING_DEFAULT; /* default setting */
248 static DEFINE_SPINLOCK(ht6560b_lock);
251 * Enable/Disable so called prefetch mode
253 static void ht_set_prefetch(ide_drive_t *drive, u8 state)
256 int t = HT_PREFETCH_MODE << 8;
258 spin_lock_irqsave(&ht6560b_lock, flags);
261 * Prefetch mode and unmask irq seems to conflict
264 drive->drive_data |= t; /* enable prefetch mode */
265 drive->no_unmask = 1;
268 drive->drive_data &= ~t; /* disable prefetch mode */
269 drive->no_unmask = 0;
272 spin_unlock_irqrestore(&ht6560b_lock, flags);
275 printk("ht6560b: drive %s prefetch mode %sabled\n", drive->name, (state ? "en" : "dis"));
279 static void ht6560b_set_pio_mode(ide_drive_t *drive, const u8 pio)
285 case 8: /* set prefetch off */
286 case 9: /* set prefetch on */
287 ht_set_prefetch(drive, pio & 1);
291 timing = ht_pio2timings(drive, pio);
293 spin_lock_irqsave(&ht6560b_lock, flags);
294 drive->drive_data &= 0xff00;
295 drive->drive_data |= timing;
296 spin_unlock_irqrestore(&ht6560b_lock, flags);
299 printk("ht6560b: drive %s tuned to pio mode %#x timing=%#x\n", drive->name, pio, timing);
303 int probe_ht6560b = 0;
305 module_param_named(probe, probe_ht6560b, bool, 0);
306 MODULE_PARM_DESC(probe, "probe for HT6560B chipset");
308 static int __init ht6560b_init(void)
310 ide_hwif_t *hwif, *mate;
311 static u8 idx[4] = { 0, 1, 0xff, 0xff };
314 if (probe_ht6560b == 0)
317 hwif = &ide_hwifs[0];
318 mate = &ide_hwifs[1];
320 if (!request_region(HT_CONFIG_PORT, 1, hwif->name)) {
321 printk(KERN_NOTICE "%s: HT_CONFIG_PORT not found\n",
326 if (!try_to_init_ht6560b()) {
327 printk(KERN_NOTICE "%s: HBA not found\n", __FUNCTION__);
331 hwif->chipset = ide_ht6560b;
332 hwif->selectproc = &ht6560b_selectproc;
333 hwif->host_flags = IDE_HFLAG_ABUSE_PREFETCH;
334 hwif->pio_mask = ATA_PIO5;
335 hwif->set_pio_mode = &ht6560b_set_pio_mode;
336 hwif->serialized = 1; /* is this needed? */
339 mate->chipset = ide_ht6560b;
340 mate->selectproc = &ht6560b_selectproc;
341 mate->host_flags = IDE_HFLAG_ABUSE_PREFETCH;
342 mate->pio_mask = ATA_PIO5;
343 mate->set_pio_mode = &ht6560b_set_pio_mode;
344 mate->serialized = 1; /* is this needed? */
349 * Setting default configurations for drives
351 t = (HT_CONFIG_DEFAULT << 8);
352 t |= HT_TIMING_DEFAULT;
353 hwif->drives[0].drive_data = t;
354 hwif->drives[1].drive_data = t;
356 t |= (HT_SECONDARY_IF << 8);
357 mate->drives[0].drive_data = t;
358 mate->drives[1].drive_data = t;
365 release_region(HT_CONFIG_PORT, 1);
369 module_init(ht6560b_init);
371 MODULE_AUTHOR("See Local File");
372 MODULE_DESCRIPTION("HT-6560B EIDE-controller support");
373 MODULE_LICENSE("GPL");