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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Copyright (C) 1995-1996 Linus Torvalds & authors (see below) |
3 | */ | |
4 | ||
5 | /* | |
6 | * Original authors: abramov@cecmow.enet.dec.com (Igor Abramov) | |
4752b5e7 | 7 | * mlord@pobox.com (Mark Lord) |
1da177e4 LT |
8 | * |
9 | * See linux/MAINTAINERS for address of current maintainer. | |
10 | * | |
11 | * This file provides support for the advanced features and bugs | |
12 | * of IDE interfaces using the CMD Technologies 0640 IDE interface chip. | |
13 | * | |
14 | * These chips are basically fucked by design, and getting this driver | |
15 | * to work on every motherboard design that uses this screwed chip seems | |
16 | * bloody well impossible. However, we're still trying. | |
17 | * | |
18 | * Version 0.97 worked for everybody. | |
19 | * | |
20 | * User feedback is essential. Many thanks to the beta test team: | |
21 | * | |
22 | * A.Hartgers@stud.tue.nl, JZDQC@CUNYVM.CUNY.edu, abramov@cecmow.enet.dec.com, | |
23 | * bardj@utopia.ppp.sn.no, bart@gaga.tue.nl, bbol001@cs.auckland.ac.nz, | |
24 | * chrisc@dbass.demon.co.uk, dalecki@namu26.Num.Math.Uni-Goettingen.de, | |
25 | * derekn@vw.ece.cmu.edu, florian@btp2x3.phy.uni-bayreuth.de, | |
26 | * flynn@dei.unipd.it, gadio@netvision.net.il, godzilla@futuris.net, | |
27 | * j@pobox.com, jkemp1@mises.uni-paderborn.de, jtoppe@hiwaay.net, | |
28 | * kerouac@ssnet.com, meskes@informatik.rwth-aachen.de, hzoli@cs.elte.hu, | |
29 | * peter@udgaard.isgtec.com, phil@tazenda.demon.co.uk, roadcapw@cfw.com, | |
30 | * s0033las@sun10.vsz.bme.hu, schaffer@tam.cornell.edu, sjd@slip.net, | |
31 | * steve@ei.org, ulrpeg@bigcomm.gun.de, ism@tardis.ed.ac.uk, mack@cray.com | |
32 | * liug@mama.indstate.edu, and others. | |
33 | * | |
34 | * Version 0.01 Initial version, hacked out of ide.c, | |
35 | * and #include'd rather than compiled separately. | |
36 | * This will get cleaned up in a subsequent release. | |
37 | * | |
38 | * Version 0.02 Fixes for vlb initialization code, enable prefetch | |
39 | * for versions 'B' and 'C' of chip by default, | |
40 | * some code cleanup. | |
41 | * | |
42 | * Version 0.03 Added reset of secondary interface, | |
43 | * and black list for devices which are not compatible | |
44 | * with prefetch mode. Separate function for setting | |
45 | * prefetch is added, possibly it will be called some | |
46 | * day from ioctl processing code. | |
47 | * | |
48 | * Version 0.04 Now configs/compiles separate from ide.c | |
49 | * | |
50 | * Version 0.05 Major rewrite of interface timing code. | |
51 | * Added new function cmd640_set_mode to set PIO mode | |
52 | * from ioctl call. New drives added to black list. | |
53 | * | |
54 | * Version 0.06 More code cleanup. Prefetch is enabled only for | |
55 | * detected hard drives, not included in prefetch | |
56 | * black list. | |
57 | * | |
58 | * Version 0.07 Changed to more conservative drive tuning policy. | |
59 | * Unknown drives, which report PIO < 4 are set to | |
60 | * (reported_PIO - 1) if it is supported, or to PIO0. | |
61 | * List of known drives extended by info provided by | |
62 | * CMD at their ftp site. | |
63 | * | |
64 | * Version 0.08 Added autotune/noautotune support. | |
65 | * | |
66 | * Version 0.09 Try to be smarter about 2nd port enabling. | |
67 | * Version 0.10 Be nice and don't reset 2nd port. | |
68 | * Version 0.11 Try to handle more weird situations. | |
69 | * | |
70 | * Version 0.12 Lots of bug fixes from Laszlo Peter | |
71 | * irq unmasking disabled for reliability. | |
72 | * try to be even smarter about the second port. | |
73 | * tidy up source code formatting. | |
74 | * Version 0.13 permit irq unmasking again. | |
75 | * Version 0.90 massive code cleanup, some bugs fixed. | |
76 | * defaults all drives to PIO mode0, prefetch off. | |
77 | * autotune is OFF by default, with compile time flag. | |
78 | * prefetch can be turned OFF/ON using "hdparm -p8/-p9" | |
79 | * (requires hdparm-3.1 or newer) | |
80 | * Version 0.91 first release to linux-kernel list. | |
81 | * Version 0.92 move initial reg dump to separate callable function | |
82 | * change "readahead" to "prefetch" to avoid confusion | |
83 | * Version 0.95 respect original BIOS timings unless autotuning. | |
84 | * tons of code cleanup and rearrangement. | |
85 | * added CONFIG_BLK_DEV_CMD640_ENHANCED option | |
86 | * prevent use of unmask when prefetch is on | |
87 | * Version 0.96 prevent use of io_32bit when prefetch is off | |
88 | * Version 0.97 fix VLB secondary interface for sjd@slip.net | |
89 | * other minor tune-ups: 0.96 was very good. | |
90 | * Version 0.98 ignore PCI version when disabled by BIOS | |
91 | * Version 0.99 display setup/active/recovery clocks with PIO mode | |
92 | * Version 1.00 Mmm.. cannot depend on PCMD_ENA in all systems | |
93 | * Version 1.01 slow/fast devsel can be selected with "hdparm -p6/-p7" | |
94 | * ("fast" is necessary for 32bit I/O in some systems) | |
95 | * Version 1.02 fix bug that resulted in slow "setup times" | |
96 | * (patch courtesy of Zoltan Hidvegi) | |
97 | */ | |
98 | ||
1da177e4 LT |
99 | #define CMD640_PREFETCH_MASKS 1 |
100 | ||
4752b5e7 | 101 | /*#define CMD640_DUMP_REGS */ |
1da177e4 | 102 | |
1da177e4 LT |
103 | #include <linux/types.h> |
104 | #include <linux/kernel.h> | |
105 | #include <linux/delay.h> | |
1da177e4 LT |
106 | #include <linux/hdreg.h> |
107 | #include <linux/ide.h> | |
108 | #include <linux/init.h> | |
109 | ||
110 | #include <asm/io.h> | |
111 | ||
7ebe5936 BZ |
112 | #define DRV_NAME "cmd640" |
113 | ||
ef87f8d0 | 114 | static int cmd640_vlb; |
1da177e4 LT |
115 | |
116 | /* | |
117 | * CMD640 specific registers definition. | |
118 | */ | |
119 | ||
120 | #define VID 0x00 | |
121 | #define DID 0x02 | |
122 | #define PCMD 0x04 | |
123 | #define PCMD_ENA 0x01 | |
124 | #define PSTTS 0x06 | |
125 | #define REVID 0x08 | |
126 | #define PROGIF 0x09 | |
127 | #define SUBCL 0x0a | |
128 | #define BASCL 0x0b | |
129 | #define BaseA0 0x10 | |
130 | #define BaseA1 0x14 | |
131 | #define BaseA2 0x18 | |
132 | #define BaseA3 0x1c | |
133 | #define INTLINE 0x3c | |
134 | #define INPINE 0x3d | |
135 | ||
136 | #define CFR 0x50 | |
137 | #define CFR_DEVREV 0x03 | |
138 | #define CFR_IDE01INTR 0x04 | |
139 | #define CFR_DEVID 0x18 | |
140 | #define CFR_AT_VESA_078h 0x20 | |
141 | #define CFR_DSA1 0x40 | |
142 | #define CFR_DSA0 0x80 | |
143 | ||
144 | #define CNTRL 0x51 | |
145 | #define CNTRL_DIS_RA0 0x40 | |
146 | #define CNTRL_DIS_RA1 0x80 | |
147 | #define CNTRL_ENA_2ND 0x08 | |
148 | ||
149 | #define CMDTIM 0x52 | |
150 | #define ARTTIM0 0x53 | |
151 | #define DRWTIM0 0x54 | |
152 | #define ARTTIM1 0x55 | |
153 | #define DRWTIM1 0x56 | |
154 | #define ARTTIM23 0x57 | |
155 | #define ARTTIM23_DIS_RA2 0x04 | |
156 | #define ARTTIM23_DIS_RA3 0x08 | |
157 | #define DRWTIM23 0x58 | |
158 | #define BRST 0x59 | |
159 | ||
160 | /* | |
161 | * Registers and masks for easy access by drive index: | |
162 | */ | |
163 | static u8 prefetch_regs[4] = {CNTRL, CNTRL, ARTTIM23, ARTTIM23}; | |
164 | static u8 prefetch_masks[4] = {CNTRL_DIS_RA0, CNTRL_DIS_RA1, ARTTIM23_DIS_RA2, ARTTIM23_DIS_RA3}; | |
165 | ||
166 | #ifdef CONFIG_BLK_DEV_CMD640_ENHANCED | |
167 | ||
168 | static u8 arttim_regs[4] = {ARTTIM0, ARTTIM1, ARTTIM23, ARTTIM23}; | |
169 | static u8 drwtim_regs[4] = {DRWTIM0, DRWTIM1, DRWTIM23, DRWTIM23}; | |
170 | ||
171 | /* | |
172 | * Current cmd640 timing values for each drive. | |
173 | * The defaults for each are the slowest possible timings. | |
174 | */ | |
175 | static u8 setup_counts[4] = {4, 4, 4, 4}; /* Address setup count (in clocks) */ | |
176 | static u8 active_counts[4] = {16, 16, 16, 16}; /* Active count (encoded) */ | |
177 | static u8 recovery_counts[4] = {16, 16, 16, 16}; /* Recovery count (encoded) */ | |
178 | ||
179 | #endif /* CONFIG_BLK_DEV_CMD640_ENHANCED */ | |
180 | ||
5bbcf924 BZ |
181 | static DEFINE_SPINLOCK(cmd640_lock); |
182 | ||
1da177e4 LT |
183 | /* |
184 | * These are initialized to point at the devices we control | |
185 | */ | |
186 | static ide_hwif_t *cmd_hwif0, *cmd_hwif1; | |
1da177e4 LT |
187 | |
188 | /* | |
189 | * Interface to access cmd640x registers | |
190 | */ | |
191 | static unsigned int cmd640_key; | |
192 | static void (*__put_cmd640_reg)(u16 reg, u8 val); | |
193 | static u8 (*__get_cmd640_reg)(u16 reg); | |
194 | ||
195 | /* | |
196 | * This is read from the CFR reg, and is used in several places. | |
197 | */ | |
198 | static unsigned int cmd640_chip_version; | |
199 | ||
200 | /* | |
201 | * The CMD640x chip does not support DWORD config write cycles, but some | |
202 | * of the BIOSes use them to implement the config services. | |
203 | * Therefore, we must use direct IO instead. | |
204 | */ | |
205 | ||
206 | /* PCI method 1 access */ | |
207 | ||
4752b5e7 | 208 | static void put_cmd640_reg_pci1(u16 reg, u8 val) |
1da177e4 LT |
209 | { |
210 | outl_p((reg & 0xfc) | cmd640_key, 0xcf8); | |
211 | outb_p(val, (reg & 3) | 0xcfc); | |
212 | } | |
213 | ||
4752b5e7 | 214 | static u8 get_cmd640_reg_pci1(u16 reg) |
1da177e4 LT |
215 | { |
216 | outl_p((reg & 0xfc) | cmd640_key, 0xcf8); | |
217 | return inb_p((reg & 3) | 0xcfc); | |
218 | } | |
219 | ||
220 | /* PCI method 2 access (from CMD datasheet) */ | |
221 | ||
4752b5e7 | 222 | static void put_cmd640_reg_pci2(u16 reg, u8 val) |
1da177e4 LT |
223 | { |
224 | outb_p(0x10, 0xcf8); | |
225 | outb_p(val, cmd640_key + reg); | |
226 | outb_p(0, 0xcf8); | |
227 | } | |
228 | ||
4752b5e7 | 229 | static u8 get_cmd640_reg_pci2(u16 reg) |
1da177e4 LT |
230 | { |
231 | u8 b; | |
232 | ||
233 | outb_p(0x10, 0xcf8); | |
234 | b = inb_p(cmd640_key + reg); | |
235 | outb_p(0, 0xcf8); | |
236 | return b; | |
237 | } | |
238 | ||
239 | /* VLB access */ | |
240 | ||
4752b5e7 | 241 | static void put_cmd640_reg_vlb(u16 reg, u8 val) |
1da177e4 LT |
242 | { |
243 | outb_p(reg, cmd640_key); | |
244 | outb_p(val, cmd640_key + 4); | |
245 | } | |
246 | ||
4752b5e7 | 247 | static u8 get_cmd640_reg_vlb(u16 reg) |
1da177e4 LT |
248 | { |
249 | outb_p(reg, cmd640_key); | |
250 | return inb_p(cmd640_key + 4); | |
251 | } | |
252 | ||
253 | static u8 get_cmd640_reg(u16 reg) | |
254 | { | |
1da177e4 | 255 | unsigned long flags; |
5bbcf924 | 256 | u8 b; |
1da177e4 | 257 | |
5bbcf924 | 258 | spin_lock_irqsave(&cmd640_lock, flags); |
1da177e4 | 259 | b = __get_cmd640_reg(reg); |
5bbcf924 | 260 | spin_unlock_irqrestore(&cmd640_lock, flags); |
1da177e4 LT |
261 | return b; |
262 | } | |
263 | ||
264 | static void put_cmd640_reg(u16 reg, u8 val) | |
265 | { | |
266 | unsigned long flags; | |
267 | ||
5bbcf924 | 268 | spin_lock_irqsave(&cmd640_lock, flags); |
4752b5e7 | 269 | __put_cmd640_reg(reg, val); |
5bbcf924 | 270 | spin_unlock_irqrestore(&cmd640_lock, flags); |
1da177e4 LT |
271 | } |
272 | ||
4752b5e7 | 273 | static int __init match_pci_cmd640_device(void) |
1da177e4 LT |
274 | { |
275 | const u8 ven_dev[4] = {0x95, 0x10, 0x40, 0x06}; | |
276 | unsigned int i; | |
277 | for (i = 0; i < 4; i++) { | |
278 | if (get_cmd640_reg(i) != ven_dev[i]) | |
279 | return 0; | |
280 | } | |
281 | #ifdef STUPIDLY_TRUST_BROKEN_PCMD_ENA_BIT | |
282 | if ((get_cmd640_reg(PCMD) & PCMD_ENA) == 0) { | |
283 | printk("ide: cmd640 on PCI disabled by BIOS\n"); | |
284 | return 0; | |
285 | } | |
286 | #endif /* STUPIDLY_TRUST_BROKEN_PCMD_ENA_BIT */ | |
287 | return 1; /* success */ | |
288 | } | |
289 | ||
290 | /* | |
291 | * Probe for CMD640x -- pci method 1 | |
292 | */ | |
4752b5e7 | 293 | static int __init probe_for_cmd640_pci1(void) |
1da177e4 LT |
294 | { |
295 | __get_cmd640_reg = get_cmd640_reg_pci1; | |
296 | __put_cmd640_reg = put_cmd640_reg_pci1; | |
297 | for (cmd640_key = 0x80000000; | |
298 | cmd640_key <= 0x8000f800; | |
299 | cmd640_key += 0x800) { | |
300 | if (match_pci_cmd640_device()) | |
301 | return 1; /* success */ | |
302 | } | |
303 | return 0; | |
304 | } | |
305 | ||
306 | /* | |
307 | * Probe for CMD640x -- pci method 2 | |
308 | */ | |
4752b5e7 | 309 | static int __init probe_for_cmd640_pci2(void) |
1da177e4 LT |
310 | { |
311 | __get_cmd640_reg = get_cmd640_reg_pci2; | |
312 | __put_cmd640_reg = put_cmd640_reg_pci2; | |
313 | for (cmd640_key = 0xc000; cmd640_key <= 0xcf00; cmd640_key += 0x100) { | |
314 | if (match_pci_cmd640_device()) | |
315 | return 1; /* success */ | |
316 | } | |
317 | return 0; | |
318 | } | |
319 | ||
320 | /* | |
321 | * Probe for CMD640x -- vlb | |
322 | */ | |
4752b5e7 | 323 | static int __init probe_for_cmd640_vlb(void) |
1da177e4 LT |
324 | { |
325 | u8 b; | |
326 | ||
327 | __get_cmd640_reg = get_cmd640_reg_vlb; | |
328 | __put_cmd640_reg = put_cmd640_reg_vlb; | |
329 | cmd640_key = 0x178; | |
330 | b = get_cmd640_reg(CFR); | |
331 | if (b == 0xff || b == 0x00 || (b & CFR_AT_VESA_078h)) { | |
332 | cmd640_key = 0x78; | |
333 | b = get_cmd640_reg(CFR); | |
334 | if (b == 0xff || b == 0x00 || !(b & CFR_AT_VESA_078h)) | |
335 | return 0; | |
336 | } | |
337 | return 1; /* success */ | |
338 | } | |
339 | ||
340 | /* | |
341 | * Returns 1 if an IDE interface/drive exists at 0x170, | |
342 | * Returns 0 otherwise. | |
343 | */ | |
4752b5e7 | 344 | static int __init secondary_port_responding(void) |
1da177e4 LT |
345 | { |
346 | unsigned long flags; | |
347 | ||
5bbcf924 | 348 | spin_lock_irqsave(&cmd640_lock, flags); |
1da177e4 | 349 | |
4c3032d8 | 350 | outb_p(0x0a, 0x176); /* select drive0 */ |
1da177e4 | 351 | udelay(100); |
4c3032d8 BZ |
352 | if ((inb_p(0x176) & 0x1f) != 0x0a) { |
353 | outb_p(0x1a, 0x176); /* select drive1 */ | |
1da177e4 | 354 | udelay(100); |
4c3032d8 | 355 | if ((inb_p(0x176) & 0x1f) != 0x1a) { |
5bbcf924 | 356 | spin_unlock_irqrestore(&cmd640_lock, flags); |
1da177e4 LT |
357 | return 0; /* nothing responded */ |
358 | } | |
359 | } | |
5bbcf924 | 360 | spin_unlock_irqrestore(&cmd640_lock, flags); |
1da177e4 LT |
361 | return 1; /* success */ |
362 | } | |
363 | ||
364 | #ifdef CMD640_DUMP_REGS | |
365 | /* | |
366 | * Dump out all cmd640 registers. May be called from ide.c | |
367 | */ | |
4752b5e7 | 368 | static void cmd640_dump_regs(void) |
1da177e4 LT |
369 | { |
370 | unsigned int reg = cmd640_vlb ? 0x50 : 0x00; | |
371 | ||
372 | /* Dump current state of chip registers */ | |
373 | printk("ide: cmd640 internal register dump:"); | |
374 | for (; reg <= 0x59; reg++) { | |
375 | if (!(reg & 0x0f)) | |
376 | printk("\n%04x:", reg); | |
377 | printk(" %02x", get_cmd640_reg(reg)); | |
378 | } | |
379 | printk("\n"); | |
380 | } | |
381 | #endif | |
382 | ||
bdffe5d2 | 383 | #ifndef CONFIG_BLK_DEV_CMD640_ENHANCED |
1da177e4 LT |
384 | /* |
385 | * Check whether prefetch is on for a drive, | |
386 | * and initialize the unmask flags for safe operation. | |
387 | */ | |
9523076a | 388 | static void __init check_prefetch(ide_drive_t *drive, unsigned int index) |
1da177e4 | 389 | { |
1da177e4 LT |
390 | u8 b = get_cmd640_reg(prefetch_regs[index]); |
391 | ||
392 | if (b & prefetch_masks[index]) { /* is prefetch off? */ | |
393 | drive->no_unmask = 0; | |
394 | drive->no_io_32bit = 1; | |
395 | drive->io_32bit = 0; | |
396 | } else { | |
397 | #if CMD640_PREFETCH_MASKS | |
398 | drive->no_unmask = 1; | |
399 | drive->unmask = 0; | |
400 | #endif | |
401 | drive->no_io_32bit = 0; | |
402 | } | |
403 | } | |
bdffe5d2 | 404 | #else |
1da177e4 LT |
405 | /* |
406 | * Sets prefetch mode for a drive. | |
407 | */ | |
9523076a | 408 | static void set_prefetch_mode(ide_drive_t *drive, unsigned int index, int mode) |
1da177e4 | 409 | { |
5bbcf924 | 410 | unsigned long flags; |
1da177e4 LT |
411 | int reg = prefetch_regs[index]; |
412 | u8 b; | |
1da177e4 | 413 | |
5bbcf924 | 414 | spin_lock_irqsave(&cmd640_lock, flags); |
1da177e4 LT |
415 | b = __get_cmd640_reg(reg); |
416 | if (mode) { /* want prefetch on? */ | |
417 | #if CMD640_PREFETCH_MASKS | |
418 | drive->no_unmask = 1; | |
419 | drive->unmask = 0; | |
420 | #endif | |
421 | drive->no_io_32bit = 0; | |
422 | b &= ~prefetch_masks[index]; /* enable prefetch */ | |
423 | } else { | |
424 | drive->no_unmask = 0; | |
425 | drive->no_io_32bit = 1; | |
426 | drive->io_32bit = 0; | |
427 | b |= prefetch_masks[index]; /* disable prefetch */ | |
428 | } | |
429 | __put_cmd640_reg(reg, b); | |
5bbcf924 | 430 | spin_unlock_irqrestore(&cmd640_lock, flags); |
1da177e4 LT |
431 | } |
432 | ||
433 | /* | |
434 | * Dump out current drive clocks settings | |
435 | */ | |
4752b5e7 | 436 | static void display_clocks(unsigned int index) |
1da177e4 LT |
437 | { |
438 | u8 active_count, recovery_count; | |
439 | ||
440 | active_count = active_counts[index]; | |
441 | if (active_count == 1) | |
442 | ++active_count; | |
443 | recovery_count = recovery_counts[index]; | |
444 | if (active_count > 3 && recovery_count == 1) | |
445 | ++recovery_count; | |
446 | if (cmd640_chip_version > 1) | |
447 | recovery_count += 1; /* cmd640b uses (count + 1)*/ | |
448 | printk(", clocks=%d/%d/%d\n", setup_counts[index], active_count, recovery_count); | |
449 | } | |
450 | ||
451 | /* | |
452 | * Pack active and recovery counts into single byte representation | |
453 | * used by controller | |
454 | */ | |
4752b5e7 | 455 | static inline u8 pack_nibbles(u8 upper, u8 lower) |
1da177e4 LT |
456 | { |
457 | return ((upper & 0x0f) << 4) | (lower & 0x0f); | |
458 | } | |
459 | ||
1da177e4 LT |
460 | /* |
461 | * This routine writes the prepared setup/active/recovery counts | |
462 | * for a drive into the cmd640 chipset registers to active them. | |
463 | */ | |
9523076a | 464 | static void program_drive_counts(ide_drive_t *drive, unsigned int index) |
1da177e4 LT |
465 | { |
466 | unsigned long flags; | |
467 | u8 setup_count = setup_counts[index]; | |
468 | u8 active_count = active_counts[index]; | |
469 | u8 recovery_count = recovery_counts[index]; | |
470 | ||
471 | /* | |
472 | * Set up address setup count and drive read/write timing registers. | |
473 | * Primary interface has individual count/timing registers for | |
474 | * each drive. Secondary interface has one common set of registers, | |
475 | * so we merge the timings, using the slowest value for each timing. | |
476 | */ | |
477 | if (index > 1) { | |
9523076a BZ |
478 | ide_hwif_t *hwif = drive->hwif; |
479 | ide_drive_t *peer = &hwif->drives[!drive->select.b.unit]; | |
480 | unsigned int mate = index ^ 1; | |
481 | ||
482 | if (peer->present) { | |
1da177e4 LT |
483 | if (setup_count < setup_counts[mate]) |
484 | setup_count = setup_counts[mate]; | |
485 | if (active_count < active_counts[mate]) | |
486 | active_count = active_counts[mate]; | |
487 | if (recovery_count < recovery_counts[mate]) | |
488 | recovery_count = recovery_counts[mate]; | |
489 | } | |
490 | } | |
491 | ||
492 | /* | |
493 | * Convert setup_count to internal chipset representation | |
494 | */ | |
495 | switch (setup_count) { | |
4752b5e7 PC |
496 | case 4: setup_count = 0x00; break; |
497 | case 3: setup_count = 0x80; break; | |
498 | case 1: | |
499 | case 2: setup_count = 0x40; break; | |
500 | default: setup_count = 0xc0; /* case 5 */ | |
1da177e4 LT |
501 | } |
502 | ||
503 | /* | |
504 | * Now that everything is ready, program the new timings | |
505 | */ | |
5bbcf924 | 506 | spin_lock_irqsave(&cmd640_lock, flags); |
1da177e4 LT |
507 | /* |
508 | * Program the address_setup clocks into ARTTIM reg, | |
509 | * and then the active/recovery counts into the DRWTIM reg | |
510 | * (this converts counts of 16 into counts of zero -- okay). | |
511 | */ | |
512 | setup_count |= __get_cmd640_reg(arttim_regs[index]) & 0x3f; | |
513 | __put_cmd640_reg(arttim_regs[index], setup_count); | |
514 | __put_cmd640_reg(drwtim_regs[index], pack_nibbles(active_count, recovery_count)); | |
5bbcf924 | 515 | spin_unlock_irqrestore(&cmd640_lock, flags); |
1da177e4 LT |
516 | } |
517 | ||
518 | /* | |
519 | * Set a specific pio_mode for a drive | |
520 | */ | |
9523076a BZ |
521 | static void cmd640_set_mode(ide_drive_t *drive, unsigned int index, |
522 | u8 pio_mode, unsigned int cycle_time) | |
1da177e4 LT |
523 | { |
524 | int setup_time, active_time, recovery_time, clock_time; | |
525 | u8 setup_count, active_count, recovery_count, recovery_count2, cycle_count; | |
ebae41a5 BZ |
526 | int bus_speed; |
527 | ||
528 | if (cmd640_vlb && ide_vlb_clk) | |
529 | bus_speed = ide_vlb_clk; | |
530 | else if (!cmd640_vlb && ide_pci_clk) | |
531 | bus_speed = ide_pci_clk; | |
532 | else | |
533 | bus_speed = system_bus_clock(); | |
1da177e4 LT |
534 | |
535 | if (pio_mode > 5) | |
536 | pio_mode = 5; | |
537 | setup_time = ide_pio_timings[pio_mode].setup_time; | |
538 | active_time = ide_pio_timings[pio_mode].active_time; | |
539 | recovery_time = cycle_time - (setup_time + active_time); | |
540 | clock_time = 1000 / bus_speed; | |
00fe8b7a | 541 | cycle_count = DIV_ROUND_UP(cycle_time, clock_time); |
1da177e4 | 542 | |
00fe8b7a | 543 | setup_count = DIV_ROUND_UP(setup_time, clock_time); |
1da177e4 | 544 | |
00fe8b7a | 545 | active_count = DIV_ROUND_UP(active_time, clock_time); |
1da177e4 LT |
546 | if (active_count < 2) |
547 | active_count = 2; /* minimum allowed by cmd640 */ | |
548 | ||
00fe8b7a | 549 | recovery_count = DIV_ROUND_UP(recovery_time, clock_time); |
1da177e4 LT |
550 | recovery_count2 = cycle_count - (setup_count + active_count); |
551 | if (recovery_count2 > recovery_count) | |
552 | recovery_count = recovery_count2; | |
553 | if (recovery_count < 2) | |
554 | recovery_count = 2; /* minimum allowed by cmd640 */ | |
555 | if (recovery_count > 17) { | |
556 | active_count += recovery_count - 17; | |
557 | recovery_count = 17; | |
558 | } | |
559 | if (active_count > 16) | |
560 | active_count = 16; /* maximum allowed by cmd640 */ | |
561 | if (cmd640_chip_version > 1) | |
562 | recovery_count -= 1; /* cmd640b uses (count + 1)*/ | |
563 | if (recovery_count > 16) | |
564 | recovery_count = 16; /* maximum allowed by cmd640 */ | |
565 | ||
566 | setup_counts[index] = setup_count; | |
567 | active_counts[index] = active_count; | |
568 | recovery_counts[index] = recovery_count; | |
569 | ||
570 | /* | |
571 | * In a perfect world, we might set the drive pio mode here | |
572 | * (using WIN_SETFEATURE) before continuing. | |
573 | * | |
574 | * But we do not, because: | |
575 | * 1) this is the wrong place to do it (proper is do_special() in ide.c) | |
576 | * 2) in practice this is rarely, if ever, necessary | |
577 | */ | |
9523076a | 578 | program_drive_counts(drive, index); |
1da177e4 LT |
579 | } |
580 | ||
26bcb879 | 581 | static void cmd640_set_pio_mode(ide_drive_t *drive, const u8 pio) |
1da177e4 | 582 | { |
7dd00083 | 583 | unsigned int index = 0, cycle_time; |
1da177e4 | 584 | u8 b; |
1da177e4 | 585 | |
26bcb879 | 586 | switch (pio) { |
4752b5e7 PC |
587 | case 6: /* set fast-devsel off */ |
588 | case 7: /* set fast-devsel on */ | |
589 | b = get_cmd640_reg(CNTRL) & ~0x27; | |
590 | if (pio & 1) | |
591 | b |= 0x27; | |
592 | put_cmd640_reg(CNTRL, b); | |
593 | printk("%s: %sabled cmd640 fast host timing (devsel)\n", | |
594 | drive->name, (pio & 1) ? "en" : "dis"); | |
595 | return; | |
596 | case 8: /* set prefetch off */ | |
597 | case 9: /* set prefetch on */ | |
598 | set_prefetch_mode(drive, index, pio & 1); | |
599 | printk("%s: %sabled cmd640 prefetch\n", | |
600 | drive->name, (pio & 1) ? "en" : "dis"); | |
601 | return; | |
1da177e4 LT |
602 | } |
603 | ||
26bcb879 | 604 | cycle_time = ide_pio_cycle_time(drive, pio); |
9523076a | 605 | cmd640_set_mode(drive, index, pio, cycle_time); |
1da177e4 | 606 | |
342cdb6d | 607 | printk("%s: selected cmd640 PIO mode%d (%dns)", |
26bcb879 | 608 | drive->name, pio, cycle_time); |
342cdb6d | 609 | |
1da177e4 | 610 | display_clocks(index); |
1da177e4 LT |
611 | } |
612 | ||
ac95beed BZ |
613 | static const struct ide_port_ops cmd640_port_ops = { |
614 | .set_pio_mode = cmd640_set_pio_mode, | |
615 | }; | |
1da177e4 LT |
616 | #endif /* CONFIG_BLK_DEV_CMD640_ENHANCED */ |
617 | ||
618 | static int pci_conf1(void) | |
619 | { | |
1da177e4 | 620 | unsigned long flags; |
5bbcf924 | 621 | u32 tmp; |
1da177e4 | 622 | |
5bbcf924 | 623 | spin_lock_irqsave(&cmd640_lock, flags); |
1da177e4 LT |
624 | outb(0x01, 0xCFB); |
625 | tmp = inl(0xCF8); | |
626 | outl(0x80000000, 0xCF8); | |
627 | if (inl(0xCF8) == 0x80000000) { | |
628 | outl(tmp, 0xCF8); | |
5bbcf924 | 629 | spin_unlock_irqrestore(&cmd640_lock, flags); |
1da177e4 LT |
630 | return 1; |
631 | } | |
632 | outl(tmp, 0xCF8); | |
5bbcf924 | 633 | spin_unlock_irqrestore(&cmd640_lock, flags); |
1da177e4 LT |
634 | return 0; |
635 | } | |
636 | ||
637 | static int pci_conf2(void) | |
638 | { | |
639 | unsigned long flags; | |
640 | ||
5bbcf924 | 641 | spin_lock_irqsave(&cmd640_lock, flags); |
1da177e4 LT |
642 | outb(0x00, 0xCFB); |
643 | outb(0x00, 0xCF8); | |
644 | outb(0x00, 0xCFA); | |
645 | if (inb(0xCF8) == 0x00 && inb(0xCF8) == 0x00) { | |
5bbcf924 | 646 | spin_unlock_irqrestore(&cmd640_lock, flags); |
1da177e4 LT |
647 | return 1; |
648 | } | |
5bbcf924 | 649 | spin_unlock_irqrestore(&cmd640_lock, flags); |
1da177e4 LT |
650 | return 0; |
651 | } | |
652 | ||
c413b9b9 BZ |
653 | static const struct ide_port_info cmd640_port_info __initdata = { |
654 | .chipset = ide_cmd640, | |
655 | .host_flags = IDE_HFLAG_SERIALIZE | | |
656 | IDE_HFLAG_NO_DMA | | |
c413b9b9 BZ |
657 | IDE_HFLAG_ABUSE_PREFETCH | |
658 | IDE_HFLAG_ABUSE_FAST_DEVSEL, | |
659 | #ifdef CONFIG_BLK_DEV_CMD640_ENHANCED | |
ac95beed | 660 | .port_ops = &cmd640_port_ops, |
c413b9b9 BZ |
661 | .pio_mask = ATA_PIO5, |
662 | #endif | |
663 | }; | |
664 | ||
7ebe5936 BZ |
665 | static int cmd640x_init_one(unsigned long base, unsigned long ctl) |
666 | { | |
667 | if (!request_region(base, 8, DRV_NAME)) { | |
668 | printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n", | |
669 | DRV_NAME, base, base + 7); | |
670 | return -EBUSY; | |
671 | } | |
672 | ||
673 | if (!request_region(ctl, 1, DRV_NAME)) { | |
674 | printk(KERN_ERR "%s: I/O resource 0x%lX not free.\n", | |
675 | DRV_NAME, ctl); | |
676 | release_region(base, 8); | |
677 | return -EBUSY; | |
678 | } | |
679 | ||
680 | return 0; | |
681 | } | |
682 | ||
1da177e4 | 683 | /* |
ade2daf9 | 684 | * Probe for a cmd640 chipset, and initialize it if found. |
1da177e4 | 685 | */ |
ade2daf9 | 686 | static int __init cmd640x_init(void) |
1da177e4 LT |
687 | { |
688 | #ifdef CONFIG_BLK_DEV_CMD640_ENHANCED | |
689 | int second_port_toggled = 0; | |
690 | #endif /* CONFIG_BLK_DEV_CMD640_ENHANCED */ | |
7ebe5936 | 691 | int second_port_cmd640 = 0, rc; |
1da177e4 LT |
692 | const char *bus_type, *port2; |
693 | unsigned int index; | |
694 | u8 b, cfr; | |
8ac4ce74 | 695 | u8 idx[4] = { 0xff, 0xff, 0xff, 0xff }; |
6d3803b6 | 696 | hw_regs_t hw[2]; |
1da177e4 LT |
697 | |
698 | if (cmd640_vlb && probe_for_cmd640_vlb()) { | |
699 | bus_type = "VLB"; | |
700 | } else { | |
701 | cmd640_vlb = 0; | |
702 | /* Find out what kind of PCI probing is supported otherwise | |
703 | Justin Gibbs will sulk.. */ | |
704 | if (pci_conf1() && probe_for_cmd640_pci1()) | |
705 | bus_type = "PCI (type1)"; | |
706 | else if (pci_conf2() && probe_for_cmd640_pci2()) | |
707 | bus_type = "PCI (type2)"; | |
708 | else | |
709 | return 0; | |
710 | } | |
711 | /* | |
712 | * Undocumented magic (there is no 0x5b reg in specs) | |
713 | */ | |
714 | put_cmd640_reg(0x5b, 0xbd); | |
715 | if (get_cmd640_reg(0x5b) != 0xbd) { | |
716 | printk(KERN_ERR "ide: cmd640 init failed: wrong value in reg 0x5b\n"); | |
717 | return 0; | |
718 | } | |
719 | put_cmd640_reg(0x5b, 0); | |
720 | ||
721 | #ifdef CMD640_DUMP_REGS | |
722 | cmd640_dump_regs(); | |
723 | #endif | |
724 | ||
725 | /* | |
726 | * Documented magic begins here | |
727 | */ | |
728 | cfr = get_cmd640_reg(CFR); | |
729 | cmd640_chip_version = cfr & CFR_DEVREV; | |
730 | if (cmd640_chip_version == 0) { | |
4752b5e7 | 731 | printk("ide: bad cmd640 revision: %d\n", cmd640_chip_version); |
1da177e4 LT |
732 | return 0; |
733 | } | |
734 | ||
7ebe5936 BZ |
735 | rc = cmd640x_init_one(0x1f0, 0x3f6); |
736 | if (rc) | |
737 | return rc; | |
738 | ||
739 | rc = cmd640x_init_one(0x170, 0x376); | |
740 | if (rc) { | |
741 | release_region(0x3f6, 1); | |
742 | release_region(0x1f0, 8); | |
743 | return rc; | |
744 | } | |
745 | ||
6d3803b6 BZ |
746 | memset(&hw, 0, sizeof(hw)); |
747 | ||
748 | ide_std_init_ports(&hw[0], 0x1f0, 0x3f6); | |
749 | hw[0].irq = 14; | |
d427e836 | 750 | hw[0].chipset = ide_cmd640; |
6d3803b6 BZ |
751 | |
752 | ide_std_init_ports(&hw[1], 0x170, 0x376); | |
753 | hw[1].irq = 15; | |
d427e836 | 754 | hw[1].chipset = ide_cmd640; |
6d3803b6 BZ |
755 | |
756 | printk(KERN_INFO "cmd640: buggy cmd640%c interface on %s, config=0x%02x" | |
757 | "\n", 'a' + cmd640_chip_version - 1, bus_type, cfr); | |
758 | ||
84f05df4 | 759 | cmd_hwif0 = ide_find_port(); |
9523076a | 760 | |
1da177e4 LT |
761 | /* |
762 | * Initialize data for primary port | |
763 | */ | |
84f05df4 BZ |
764 | if (cmd_hwif0) { |
765 | ide_init_port_hw(cmd_hwif0, &hw[0]); | |
84f05df4 BZ |
766 | idx[0] = cmd_hwif0->index; |
767 | } | |
8ac4ce74 | 768 | |
1da177e4 LT |
769 | /* |
770 | * Ensure compatibility by always using the slowest timings | |
771 | * for access to the drive's command register block, | |
772 | * and reset the prefetch burstsize to default (512 bytes). | |
773 | * | |
774 | * Maybe we need a way to NOT do these on *some* systems? | |
775 | */ | |
776 | put_cmd640_reg(CMDTIM, 0); | |
777 | put_cmd640_reg(BRST, 0x40); | |
778 | ||
84f05df4 BZ |
779 | cmd_hwif1 = ide_find_port(); |
780 | ||
1da177e4 LT |
781 | /* |
782 | * Try to enable the secondary interface, if not already enabled | |
783 | */ | |
84f05df4 BZ |
784 | if (cmd_hwif1 && |
785 | cmd_hwif1->drives[0].noprobe && cmd_hwif1->drives[1].noprobe) { | |
1da177e4 LT |
786 | port2 = "not probed"; |
787 | } else { | |
788 | b = get_cmd640_reg(CNTRL); | |
789 | if (secondary_port_responding()) { | |
790 | if ((b & CNTRL_ENA_2ND)) { | |
791 | second_port_cmd640 = 1; | |
792 | port2 = "okay"; | |
793 | } else if (cmd640_vlb) { | |
794 | second_port_cmd640 = 1; | |
795 | port2 = "alive"; | |
796 | } else | |
797 | port2 = "not cmd640"; | |
798 | } else { | |
799 | put_cmd640_reg(CNTRL, b ^ CNTRL_ENA_2ND); /* toggle the bit */ | |
800 | if (secondary_port_responding()) { | |
801 | second_port_cmd640 = 1; | |
802 | #ifdef CONFIG_BLK_DEV_CMD640_ENHANCED | |
803 | second_port_toggled = 1; | |
804 | #endif /* CONFIG_BLK_DEV_CMD640_ENHANCED */ | |
805 | port2 = "enabled"; | |
806 | } else { | |
807 | put_cmd640_reg(CNTRL, b); /* restore original setting */ | |
808 | port2 = "not responding"; | |
809 | } | |
810 | } | |
811 | } | |
812 | ||
813 | /* | |
814 | * Initialize data for secondary cmd640 port, if enabled | |
815 | */ | |
84f05df4 | 816 | if (second_port_cmd640 && cmd_hwif1) { |
6d3803b6 | 817 | ide_init_port_hw(cmd_hwif1, &hw[1]); |
8ac4ce74 | 818 | idx[1] = cmd_hwif1->index; |
1da177e4 | 819 | } |
84f05df4 | 820 | printk(KERN_INFO "cmd640: %sserialized, secondary interface %s\n", |
c413b9b9 | 821 | second_port_cmd640 ? "" : "not ", port2); |
1da177e4 LT |
822 | |
823 | /* | |
824 | * Establish initial timings/prefetch for all drives. | |
825 | * Do not unnecessarily disturb any prior BIOS setup of these. | |
826 | */ | |
827 | for (index = 0; index < (2 + (second_port_cmd640 << 1)); index++) { | |
9523076a BZ |
828 | ide_drive_t *drive; |
829 | ||
84f05df4 BZ |
830 | if (index > 1) { |
831 | if (cmd_hwif1 == NULL) | |
832 | continue; | |
9523076a | 833 | drive = &cmd_hwif1->drives[index & 1]; |
84f05df4 BZ |
834 | } else { |
835 | if (cmd_hwif0 == NULL) | |
836 | continue; | |
9523076a | 837 | drive = &cmd_hwif0->drives[index & 1]; |
84f05df4 | 838 | } |
9523076a | 839 | |
1da177e4 | 840 | #ifdef CONFIG_BLK_DEV_CMD640_ENHANCED |
bdffe5d2 BZ |
841 | /* |
842 | * Reset timing to the slowest speed and turn off prefetch. | |
843 | * This way, the drive identify code has a better chance. | |
844 | */ | |
845 | setup_counts [index] = 4; /* max possible */ | |
846 | active_counts [index] = 16; /* max possible */ | |
847 | recovery_counts [index] = 16; /* max possible */ | |
848 | program_drive_counts(drive, index); | |
849 | set_prefetch_mode(drive, index, 0); | |
850 | printk("cmd640: drive%d timings/prefetch cleared\n", index); | |
1da177e4 LT |
851 | #else |
852 | /* | |
853 | * Set the drive unmask flags to match the prefetch setting | |
854 | */ | |
9523076a | 855 | check_prefetch(drive, index); |
1da177e4 LT |
856 | printk("cmd640: drive%d timings/prefetch(%s) preserved\n", |
857 | index, drive->no_io_32bit ? "off" : "on"); | |
858 | #endif /* CONFIG_BLK_DEV_CMD640_ENHANCED */ | |
859 | } | |
860 | ||
861 | #ifdef CMD640_DUMP_REGS | |
862 | cmd640_dump_regs(); | |
863 | #endif | |
8ac4ce74 | 864 | |
c413b9b9 | 865 | ide_device_add(idx, &cmd640_port_info); |
8ac4ce74 | 866 | |
1da177e4 LT |
867 | return 1; |
868 | } | |
869 | ||
ade2daf9 BZ |
870 | module_param_named(probe_vlb, cmd640_vlb, bool, 0); |
871 | MODULE_PARM_DESC(probe_vlb, "probe for VLB version of CMD640 chipset"); | |
872 | ||
873 | module_init(cmd640x_init); | |
776c0bce AB |
874 | |
875 | MODULE_LICENSE("GPL"); |