1 /*
2 * Support for IDE interfaces on PowerMacs.
3 *
4 * These IDE interfaces are memory-mapped and have a DBDMA channel
5 * for doing DMA.
6 *
7 * Copyright (C) 1998-2003 Paul Mackerras & Ben. Herrenschmidt
8 * Copyright (C) 2007-2008 Bartlomiej Zolnierkiewicz
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
14 *
15 * Some code taken from drivers/ide/ide-dma.c:
16 *
17 * Copyright (c) 1995-1998 Mark Lord
18 *
19 * TODO: - Use pre-calculated (kauai) timing tables all the time and
20 * get rid of the "rounded" tables used previously, so we have the
21 * same table format for all controllers and can then just have one
22 * big table
23 *
24 */
25 #include <linux/types.h>
26 #include <linux/kernel.h>
27 #include <linux/init.h>
28 #include <linux/delay.h>
29 #include <linux/ide.h>
30 #include <linux/notifier.h>
31 #include <linux/module.h>
32 #include <linux/reboot.h>
33 #include <linux/pci.h>
34 #include <linux/adb.h>
35 #include <linux/pmu.h>
36 #include <linux/scatterlist.h>
37 #include <linux/slab.h>
38
39 #include <asm/prom.h>
40 #include <asm/io.h>
41 #include <asm/dbdma.h>
42 #include <asm/ide.h>
43 #include <asm/machdep.h>
44 #include <asm/pmac_feature.h>
45 #include <asm/sections.h>
46 #include <asm/irq.h>
47 #include <asm/mediabay.h>
48
49 #define DRV_NAME "ide-pmac"
50
51 #undef IDE_PMAC_DEBUG
52
53 #define DMA_WAIT_TIMEOUT 50
54
55 typedef struct pmac_ide_hwif {
56 unsigned long regbase;
57 int irq;
58 int kind;
59 int aapl_bus_id;
60 unsigned broken_dma : 1;
61 unsigned broken_dma_warn : 1;
62 struct device_node* node;
63 struct macio_dev *mdev;
64 u32 timings[4];
65 volatile u32 __iomem * *kauai_fcr;
66 ide_hwif_t *hwif;
67
68 /* Those fields are duplicating what is in hwif. We currently
69 * can't use the hwif ones because of some assumptions that are
70 * beeing done by the generic code about the kind of dma controller
71 * and format of the dma table. This will have to be fixed though.
72 */
73 volatile struct dbdma_regs __iomem * dma_regs;
74 struct dbdma_cmd* dma_table_cpu;
75 } pmac_ide_hwif_t;
76
77 enum {
78 controller_ohare, /* OHare based */
79 controller_heathrow, /* Heathrow/Paddington */
80 controller_kl_ata3, /* KeyLargo ATA-3 */
81 controller_kl_ata4, /* KeyLargo ATA-4 */
82 controller_un_ata6, /* UniNorth2 ATA-6 */
83 controller_k2_ata6, /* K2 ATA-6 */
84 controller_sh_ata6, /* Shasta ATA-6 */
85 };
86
87 static const char* model_name[] = {
88 "OHare ATA", /* OHare based */
89 "Heathrow ATA", /* Heathrow/Paddington */
90 "KeyLargo ATA-3", /* KeyLargo ATA-3 (MDMA only) */
91 "KeyLargo ATA-4", /* KeyLargo ATA-4 (UDMA/66) */
92 "UniNorth ATA-6", /* UniNorth2 ATA-6 (UDMA/100) */
93 "K2 ATA-6", /* K2 ATA-6 (UDMA/100) */
94 "Shasta ATA-6", /* Shasta ATA-6 (UDMA/133) */
95 };
96
97 /*
98 * Extra registers, both 32-bit little-endian
99 */
100 #define IDE_TIMING_CONFIG 0x200
101 #define IDE_INTERRUPT 0x300
102
103 /* Kauai (U2) ATA has different register setup */
104 #define IDE_KAUAI_PIO_CONFIG 0x200
105 #define IDE_KAUAI_ULTRA_CONFIG 0x210
106 #define IDE_KAUAI_POLL_CONFIG 0x220
107
108 /*
109 * Timing configuration register definitions
110 */
111
112 /* Number of IDE_SYSCLK_NS ticks, argument is in nanoseconds */
113 #define SYSCLK_TICKS(t) (((t) + IDE_SYSCLK_NS - 1) / IDE_SYSCLK_NS)
114 #define SYSCLK_TICKS_66(t) (((t) + IDE_SYSCLK_66_NS - 1) / IDE_SYSCLK_66_NS)
115 #define IDE_SYSCLK_NS 30 /* 33Mhz cell */
116 #define IDE_SYSCLK_66_NS 15 /* 66Mhz cell */
117
118 /* 133Mhz cell, found in shasta.
119 * See comments about 100 Mhz Uninorth 2...
120 * Note that PIO_MASK and MDMA_MASK seem to overlap
121 */
122 #define TR_133_PIOREG_PIO_MASK 0xff000fff
123 #define TR_133_PIOREG_MDMA_MASK 0x00fff800
124 #define TR_133_UDMAREG_UDMA_MASK 0x0003ffff
125 #define TR_133_UDMAREG_UDMA_EN 0x00000001
126
127 /* 100Mhz cell, found in Uninorth 2. I don't have much infos about
128 * this one yet, it appears as a pci device (106b/0033) on uninorth
129 * internal PCI bus and it's clock is controlled like gem or fw. It
130 * appears to be an evolution of keylargo ATA4 with a timing register
131 * extended to 2 32bits registers and a similar DBDMA channel. Other
132 * registers seem to exist but I can't tell much about them.
133 *
134 * So far, I'm using pre-calculated tables for this extracted from
135 * the values used by the MacOS X driver.
136 *
137 * The "PIO" register controls PIO and MDMA timings, the "ULTRA"
138 * register controls the UDMA timings. At least, it seems bit 0
139 * of this one enables UDMA vs. MDMA, and bits 4..7 are the
140 * cycle time in units of 10ns. Bits 8..15 are used by I don't
141 * know their meaning yet
142 */
143 #define TR_100_PIOREG_PIO_MASK 0xff000fff
144 #define TR_100_PIOREG_MDMA_MASK 0x00fff000
145 #define TR_100_UDMAREG_UDMA_MASK 0x0000ffff
146 #define TR_100_UDMAREG_UDMA_EN 0x00000001
147
148
149 /* 66Mhz cell, found in KeyLargo. Can do ultra mode 0 to 2 on
150 * 40 connector cable and to 4 on 80 connector one.
151 * Clock unit is 15ns (66Mhz)
152 *
153 * 3 Values can be programmed:
154 * - Write data setup, which appears to match the cycle time. They
155 * also call it DIOW setup.
156 * - Ready to pause time (from spec)
157 * - Address setup. That one is weird. I don't see where exactly
158 * it fits in UDMA cycles, I got it's name from an obscure piece
159 * of commented out code in Darwin. They leave it to 0, we do as
160 * well, despite a comment that would lead to think it has a
161 * min value of 45ns.
162 * Apple also add 60ns to the write data setup (or cycle time ?) on
163 * reads.
164 */
165 #define TR_66_UDMA_MASK 0xfff00000
166 #define TR_66_UDMA_EN 0x00100000 /* Enable Ultra mode for DMA */
167 #define TR_66_UDMA_ADDRSETUP_MASK 0xe0000000 /* Address setup */
168 #define TR_66_UDMA_ADDRSETUP_SHIFT 29
169 #define TR_66_UDMA_RDY2PAUS_MASK 0x1e000000 /* Ready 2 pause time */
170 #define TR_66_UDMA_RDY2PAUS_SHIFT 25
171 #define TR_66_UDMA_WRDATASETUP_MASK 0x01e00000 /* Write data setup time */
172 #define TR_66_UDMA_WRDATASETUP_SHIFT 21
173 #define TR_66_MDMA_MASK 0x000ffc00
174 #define TR_66_MDMA_RECOVERY_MASK 0x000f8000
175 #define TR_66_MDMA_RECOVERY_SHIFT 15
176 #define TR_66_MDMA_ACCESS_MASK 0x00007c00
177 #define TR_66_MDMA_ACCESS_SHIFT 10
178 #define TR_66_PIO_MASK 0x000003ff
179 #define TR_66_PIO_RECOVERY_MASK 0x000003e0
180 #define TR_66_PIO_RECOVERY_SHIFT 5
181 #define TR_66_PIO_ACCESS_MASK 0x0000001f
182 #define TR_66_PIO_ACCESS_SHIFT 0
183
184 /* 33Mhz cell, found in OHare, Heathrow (& Paddington) and KeyLargo
185 * Can do pio & mdma modes, clock unit is 30ns (33Mhz)
186 *
187 * The access time and recovery time can be programmed. Some older
188 * Darwin code base limit OHare to 150ns cycle time. I decided to do
189 * the same here fore safety against broken old hardware ;)
190 * The HalfTick bit, when set, adds half a clock (15ns) to the access
191 * time and removes one from recovery. It's not supported on KeyLargo
192 * implementation afaik. The E bit appears to be set for PIO mode 0 and
193 * is used to reach long timings used in this mode.
194 */
195 #define TR_33_MDMA_MASK 0x003ff800
196 #define TR_33_MDMA_RECOVERY_MASK 0x001f0000
197 #define TR_33_MDMA_RECOVERY_SHIFT 16
198 #define TR_33_MDMA_ACCESS_MASK 0x0000f800
199 #define TR_33_MDMA_ACCESS_SHIFT 11
200 #define TR_33_MDMA_HALFTICK 0x00200000
201 #define TR_33_PIO_MASK 0x000007ff
202 #define TR_33_PIO_E 0x00000400
203 #define TR_33_PIO_RECOVERY_MASK 0x000003e0
204 #define TR_33_PIO_RECOVERY_SHIFT 5
205 #define TR_33_PIO_ACCESS_MASK 0x0000001f
206 #define TR_33_PIO_ACCESS_SHIFT 0
207
208 /*
209 * Interrupt register definitions
210 */
211 #define IDE_INTR_DMA 0x80000000
212 #define IDE_INTR_DEVICE 0x40000000
213
214 /*
215 * FCR Register on Kauai. Not sure what bit 0x4 is ...
216 */
217 #define KAUAI_FCR_UATA_MAGIC 0x00000004
218 #define KAUAI_FCR_UATA_RESET_N 0x00000002
219 #define KAUAI_FCR_UATA_ENABLE 0x00000001
220
221 /* Rounded Multiword DMA timings
222 *
223 * I gave up finding a generic formula for all controller
224 * types and instead, built tables based on timing values
225 * used by Apple in Darwin's implementation.
226 */
227 struct mdma_timings_t {
228 int accessTime;
229 int recoveryTime;
230 int cycleTime;
231 };
232
233 struct mdma_timings_t mdma_timings_33[] =
234 {
235 { 240, 240, 480 },
236 { 180, 180, 360 },
237 { 135, 135, 270 },
238 { 120, 120, 240 },
239 { 105, 105, 210 },
240 { 90, 90, 180 },
241 { 75, 75, 150 },
242 { 75, 45, 120 },
243 { 0, 0, 0 }
244 };
245
246 struct mdma_timings_t mdma_timings_33k[] =
247 {
248 { 240, 240, 480 },
249 { 180, 180, 360 },
250 { 150, 150, 300 },
251 { 120, 120, 240 },
252 { 90, 120, 210 },
253 { 90, 90, 180 },
254 { 90, 60, 150 },
255 { 90, 30, 120 },
256 { 0, 0, 0 }
257 };
258
259 struct mdma_timings_t mdma_timings_66[] =
260 {
261 { 240, 240, 480 },
262 { 180, 180, 360 },
263 { 135, 135, 270 },
264 { 120, 120, 240 },
265 { 105, 105, 210 },
266 { 90, 90, 180 },
267 { 90, 75, 165 },
268 { 75, 45, 120 },
269 { 0, 0, 0 }
270 };
271
272 /* KeyLargo ATA-4 Ultra DMA timings (rounded) */
273 struct {
274 int addrSetup; /* ??? */
275 int rdy2pause;
276 int wrDataSetup;
277 } kl66_udma_timings[] =
278 {
279 { 0, 180, 120 }, /* Mode 0 */
280 { 0, 150, 90 }, /* 1 */
281 { 0, 120, 60 }, /* 2 */
282 { 0, 90, 45 }, /* 3 */
283 { 0, 90, 30 } /* 4 */
284 };
285
286 /* UniNorth 2 ATA/100 timings */
287 struct kauai_timing {
288 int cycle_time;
289 u32 timing_reg;
290 };
291
292 static struct kauai_timing kauai_pio_timings[] =
293 {
294 { 930 , 0x08000fff },
295 { 600 , 0x08000a92 },
296 { 383 , 0x0800060f },
297 { 360 , 0x08000492 },
298 { 330 , 0x0800048f },
299 { 300 , 0x080003cf },
300 { 270 , 0x080003cc },
301 { 240 , 0x0800038b },
302 { 239 , 0x0800030c },
303 { 180 , 0x05000249 },
304 { 120 , 0x04000148 },
305 { 0 , 0 },
306 };
307
308 static struct kauai_timing kauai_mdma_timings[] =
309 {
310 { 1260 , 0x00fff000 },
311 { 480 , 0x00618000 },
312 { 360 , 0x00492000 },
313 { 270 , 0x0038e000 },
314 { 240 , 0x0030c000 },
315 { 210 , 0x002cb000 },
316 { 180 , 0x00249000 },
317 { 150 , 0x00209000 },
318 { 120 , 0x00148000 },
319 { 0 , 0 },
320 };
321
322 static struct kauai_timing kauai_udma_timings[] =
323 {
324 { 120 , 0x000070c0 },
325 { 90 , 0x00005d80 },
326 { 60 , 0x00004a60 },
327 { 45 , 0x00003a50 },
328 { 30 , 0x00002a30 },
329 { 20 , 0x00002921 },
330 { 0 , 0 },
331 };
332
333 static struct kauai_timing shasta_pio_timings[] =
334 {
335 { 930 , 0x08000fff },
336 { 600 , 0x0A000c97 },
337 { 383 , 0x07000712 },
338 { 360 , 0x040003cd },
339 { 330 , 0x040003cd },
340 { 300 , 0x040003cd },
341 { 270 , 0x040003cd },
342 { 240 , 0x040003cd },
343 { 239 , 0x040003cd },
344 { 180 , 0x0400028b },
345 { 120 , 0x0400010a },
346 { 0 , 0 },
347 };
348
349 static struct kauai_timing shasta_mdma_timings[] =
350 {
351 { 1260 , 0x00fff000 },
352 { 480 , 0x00820800 },
353 { 360 , 0x00820800 },
354 { 270 , 0x00820800 },
355 { 240 , 0x00820800 },
356 { 210 , 0x00820800 },
357 { 180 , 0x00820800 },
358 { 150 , 0x0028b000 },
359 { 120 , 0x001ca000 },
360 { 0 , 0 },
361 };
362
363 static struct kauai_timing shasta_udma133_timings[] =
364 {
365 { 120 , 0x00035901, },
366 { 90 , 0x000348b1, },
367 { 60 , 0x00033881, },
368 { 45 , 0x00033861, },
369 { 30 , 0x00033841, },
370 { 20 , 0x00033031, },
371 { 15 , 0x00033021, },
372 { 0 , 0 },
373 };
374
375
376 static inline u32
kauai_lookup_timing(struct kauai_timing * table,int cycle_time)377 kauai_lookup_timing(struct kauai_timing* table, int cycle_time)
378 {
379 int i;
380
381 for (i=0; table[i].cycle_time; i++)
382 if (cycle_time > table[i+1].cycle_time)
383 return table[i].timing_reg;
384 BUG();
385 return 0;
386 }
387
388 /* allow up to 256 DBDMA commands per xfer */
389 #define MAX_DCMDS 256
390
391 /*
392 * Wait 1s for disk to answer on IDE bus after a hard reset
393 * of the device (via GPIO/FCR).
394 *
395 * Some devices seem to "pollute" the bus even after dropping
396 * the BSY bit (typically some combo drives slave on the UDMA
397 * bus) after a hard reset. Since we hard reset all drives on
398 * KeyLargo ATA66, we have to keep that delay around. I may end
399 * up not hard resetting anymore on these and keep the delay only
400 * for older interfaces instead (we have to reset when coming
401 * from MacOS...) --BenH.
402 */
403 #define IDE_WAKEUP_DELAY (1*HZ)
404
405 static int pmac_ide_init_dma(ide_hwif_t *, const struct ide_port_info *);
406
407 #define PMAC_IDE_REG(x) \
408 ((void __iomem *)((drive)->hwif->io_ports.data_addr + (x)))
409
410 /*
411 * Apply the timings of the proper unit (master/slave) to the shared
412 * timing register when selecting that unit. This version is for
413 * ASICs with a single timing register
414 */
pmac_ide_apply_timings(ide_drive_t * drive)415 static void pmac_ide_apply_timings(ide_drive_t *drive)
416 {
417 ide_hwif_t *hwif = drive->hwif;
418 pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
419
420 if (drive->dn & 1)
421 writel(pmif->timings[1], PMAC_IDE_REG(IDE_TIMING_CONFIG));
422 else
423 writel(pmif->timings[0], PMAC_IDE_REG(IDE_TIMING_CONFIG));
424 (void)readl(PMAC_IDE_REG(IDE_TIMING_CONFIG));
425 }
426
427 /*
428 * Apply the timings of the proper unit (master/slave) to the shared
429 * timing register when selecting that unit. This version is for
430 * ASICs with a dual timing register (Kauai)
431 */
pmac_ide_kauai_apply_timings(ide_drive_t * drive)432 static void pmac_ide_kauai_apply_timings(ide_drive_t *drive)
433 {
434 ide_hwif_t *hwif = drive->hwif;
435 pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
436
437 if (drive->dn & 1) {
438 writel(pmif->timings[1], PMAC_IDE_REG(IDE_KAUAI_PIO_CONFIG));
439 writel(pmif->timings[3], PMAC_IDE_REG(IDE_KAUAI_ULTRA_CONFIG));
440 } else {
441 writel(pmif->timings[0], PMAC_IDE_REG(IDE_KAUAI_PIO_CONFIG));
442 writel(pmif->timings[2], PMAC_IDE_REG(IDE_KAUAI_ULTRA_CONFIG));
443 }
444 (void)readl(PMAC_IDE_REG(IDE_KAUAI_PIO_CONFIG));
445 }
446
447 /*
448 * Force an update of controller timing values for a given drive
449 */
450 static void
pmac_ide_do_update_timings(ide_drive_t * drive)451 pmac_ide_do_update_timings(ide_drive_t *drive)
452 {
453 ide_hwif_t *hwif = drive->hwif;
454 pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
455
456 if (pmif->kind == controller_sh_ata6 ||
457 pmif->kind == controller_un_ata6 ||
458 pmif->kind == controller_k2_ata6)
459 pmac_ide_kauai_apply_timings(drive);
460 else
461 pmac_ide_apply_timings(drive);
462 }
463
pmac_dev_select(ide_drive_t * drive)464 static void pmac_dev_select(ide_drive_t *drive)
465 {
466 pmac_ide_apply_timings(drive);
467
468 writeb(drive->select | ATA_DEVICE_OBS,
469 (void __iomem *)drive->hwif->io_ports.device_addr);
470 }
471
pmac_kauai_dev_select(ide_drive_t * drive)472 static void pmac_kauai_dev_select(ide_drive_t *drive)
473 {
474 pmac_ide_kauai_apply_timings(drive);
475
476 writeb(drive->select | ATA_DEVICE_OBS,
477 (void __iomem *)drive->hwif->io_ports.device_addr);
478 }
479
pmac_exec_command(ide_hwif_t * hwif,u8 cmd)480 static void pmac_exec_command(ide_hwif_t *hwif, u8 cmd)
481 {
482 writeb(cmd, (void __iomem *)hwif->io_ports.command_addr);
483 (void)readl((void __iomem *)(hwif->io_ports.data_addr
484 + IDE_TIMING_CONFIG));
485 }
486
pmac_write_devctl(ide_hwif_t * hwif,u8 ctl)487 static void pmac_write_devctl(ide_hwif_t *hwif, u8 ctl)
488 {
489 writeb(ctl, (void __iomem *)hwif->io_ports.ctl_addr);
490 (void)readl((void __iomem *)(hwif->io_ports.data_addr
491 + IDE_TIMING_CONFIG));
492 }
493
494 /*
495 * Old tuning functions (called on hdparm -p), sets up drive PIO timings
496 */
pmac_ide_set_pio_mode(ide_hwif_t * hwif,ide_drive_t * drive)497 static void pmac_ide_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
498 {
499 pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
500 const u8 pio = drive->pio_mode - XFER_PIO_0;
501 struct ide_timing *tim = ide_timing_find_mode(XFER_PIO_0 + pio);
502 u32 *timings, t;
503 unsigned accessTicks, recTicks;
504 unsigned accessTime, recTime;
505 unsigned int cycle_time;
506
507 /* which drive is it ? */
508 timings = &pmif->timings[drive->dn & 1];
509 t = *timings;
510
511 cycle_time = ide_pio_cycle_time(drive, pio);
512
513 switch (pmif->kind) {
514 case controller_sh_ata6: {
515 /* 133Mhz cell */
516 u32 tr = kauai_lookup_timing(shasta_pio_timings, cycle_time);
517 t = (t & ~TR_133_PIOREG_PIO_MASK) | tr;
518 break;
519 }
520 case controller_un_ata6:
521 case controller_k2_ata6: {
522 /* 100Mhz cell */
523 u32 tr = kauai_lookup_timing(kauai_pio_timings, cycle_time);
524 t = (t & ~TR_100_PIOREG_PIO_MASK) | tr;
525 break;
526 }
527 case controller_kl_ata4:
528 /* 66Mhz cell */
529 recTime = cycle_time - tim->active - tim->setup;
530 recTime = max(recTime, 150U);
531 accessTime = tim->active;
532 accessTime = max(accessTime, 150U);
533 accessTicks = SYSCLK_TICKS_66(accessTime);
534 accessTicks = min(accessTicks, 0x1fU);
535 recTicks = SYSCLK_TICKS_66(recTime);
536 recTicks = min(recTicks, 0x1fU);
537 t = (t & ~TR_66_PIO_MASK) |
538 (accessTicks << TR_66_PIO_ACCESS_SHIFT) |
539 (recTicks << TR_66_PIO_RECOVERY_SHIFT);
540 break;
541 default: {
542 /* 33Mhz cell */
543 int ebit = 0;
544 recTime = cycle_time - tim->active - tim->setup;
545 recTime = max(recTime, 150U);
546 accessTime = tim->active;
547 accessTime = max(accessTime, 150U);
548 accessTicks = SYSCLK_TICKS(accessTime);
549 accessTicks = min(accessTicks, 0x1fU);
550 accessTicks = max(accessTicks, 4U);
551 recTicks = SYSCLK_TICKS(recTime);
552 recTicks = min(recTicks, 0x1fU);
553 recTicks = max(recTicks, 5U) - 4;
554 if (recTicks > 9) {
555 recTicks--; /* guess, but it's only for PIO0, so... */
556 ebit = 1;
557 }
558 t = (t & ~TR_33_PIO_MASK) |
559 (accessTicks << TR_33_PIO_ACCESS_SHIFT) |
560 (recTicks << TR_33_PIO_RECOVERY_SHIFT);
561 if (ebit)
562 t |= TR_33_PIO_E;
563 break;
564 }
565 }
566
567 #ifdef IDE_PMAC_DEBUG
568 printk(KERN_ERR "%s: Set PIO timing for mode %d, reg: 0x%08x\n",
569 drive->name, pio, *timings);
570 #endif
571
572 *timings = t;
573 pmac_ide_do_update_timings(drive);
574 }
575
576 /*
577 * Calculate KeyLargo ATA/66 UDMA timings
578 */
579 static int
set_timings_udma_ata4(u32 * timings,u8 speed)580 set_timings_udma_ata4(u32 *timings, u8 speed)
581 {
582 unsigned rdyToPauseTicks, wrDataSetupTicks, addrTicks;
583
584 if (speed > XFER_UDMA_4)
585 return 1;
586
587 rdyToPauseTicks = SYSCLK_TICKS_66(kl66_udma_timings[speed & 0xf].rdy2pause);
588 wrDataSetupTicks = SYSCLK_TICKS_66(kl66_udma_timings[speed & 0xf].wrDataSetup);
589 addrTicks = SYSCLK_TICKS_66(kl66_udma_timings[speed & 0xf].addrSetup);
590
591 *timings = ((*timings) & ~(TR_66_UDMA_MASK | TR_66_MDMA_MASK)) |
592 (wrDataSetupTicks << TR_66_UDMA_WRDATASETUP_SHIFT) |
593 (rdyToPauseTicks << TR_66_UDMA_RDY2PAUS_SHIFT) |
594 (addrTicks <<TR_66_UDMA_ADDRSETUP_SHIFT) |
595 TR_66_UDMA_EN;
596 #ifdef IDE_PMAC_DEBUG
597 printk(KERN_ERR "ide_pmac: Set UDMA timing for mode %d, reg: 0x%08x\n",
598 speed & 0xf, *timings);
599 #endif
600
601 return 0;
602 }
603
604 /*
605 * Calculate Kauai ATA/100 UDMA timings
606 */
607 static int
set_timings_udma_ata6(u32 * pio_timings,u32 * ultra_timings,u8 speed)608 set_timings_udma_ata6(u32 *pio_timings, u32 *ultra_timings, u8 speed)
609 {
610 struct ide_timing *t = ide_timing_find_mode(speed);
611 u32 tr;
612
613 if (speed > XFER_UDMA_5 || t == NULL)
614 return 1;
615 tr = kauai_lookup_timing(kauai_udma_timings, (int)t->udma);
616 *ultra_timings = ((*ultra_timings) & ~TR_100_UDMAREG_UDMA_MASK) | tr;
617 *ultra_timings = (*ultra_timings) | TR_100_UDMAREG_UDMA_EN;
618
619 return 0;
620 }
621
622 /*
623 * Calculate Shasta ATA/133 UDMA timings
624 */
625 static int
set_timings_udma_shasta(u32 * pio_timings,u32 * ultra_timings,u8 speed)626 set_timings_udma_shasta(u32 *pio_timings, u32 *ultra_timings, u8 speed)
627 {
628 struct ide_timing *t = ide_timing_find_mode(speed);
629 u32 tr;
630
631 if (speed > XFER_UDMA_6 || t == NULL)
632 return 1;
633 tr = kauai_lookup_timing(shasta_udma133_timings, (int)t->udma);
634 *ultra_timings = ((*ultra_timings) & ~TR_133_UDMAREG_UDMA_MASK) | tr;
635 *ultra_timings = (*ultra_timings) | TR_133_UDMAREG_UDMA_EN;
636
637 return 0;
638 }
639
640 /*
641 * Calculate MDMA timings for all cells
642 */
643 static void
set_timings_mdma(ide_drive_t * drive,int intf_type,u32 * timings,u32 * timings2,u8 speed)644 set_timings_mdma(ide_drive_t *drive, int intf_type, u32 *timings, u32 *timings2,
645 u8 speed)
646 {
647 u16 *id = drive->id;
648 int cycleTime, accessTime = 0, recTime = 0;
649 unsigned accessTicks, recTicks;
650 struct mdma_timings_t* tm = NULL;
651 int i;
652
653 /* Get default cycle time for mode */
654 switch(speed & 0xf) {
655 case 0: cycleTime = 480; break;
656 case 1: cycleTime = 150; break;
657 case 2: cycleTime = 120; break;
658 default:
659 BUG();
660 break;
661 }
662
663 /* Check if drive provides explicit DMA cycle time */
664 if ((id[ATA_ID_FIELD_VALID] & 2) && id[ATA_ID_EIDE_DMA_TIME])
665 cycleTime = max_t(int, id[ATA_ID_EIDE_DMA_TIME], cycleTime);
666
667 /* OHare limits according to some old Apple sources */
668 if ((intf_type == controller_ohare) && (cycleTime < 150))
669 cycleTime = 150;
670 /* Get the proper timing array for this controller */
671 switch(intf_type) {
672 case controller_sh_ata6:
673 case controller_un_ata6:
674 case controller_k2_ata6:
675 break;
676 case controller_kl_ata4:
677 tm = mdma_timings_66;
678 break;
679 case controller_kl_ata3:
680 tm = mdma_timings_33k;
681 break;
682 default:
683 tm = mdma_timings_33;
684 break;
685 }
686 if (tm != NULL) {
687 /* Lookup matching access & recovery times */
688 i = -1;
689 for (;;) {
690 if (tm[i+1].cycleTime < cycleTime)
691 break;
692 i++;
693 }
694 cycleTime = tm[i].cycleTime;
695 accessTime = tm[i].accessTime;
696 recTime = tm[i].recoveryTime;
697
698 #ifdef IDE_PMAC_DEBUG
699 printk(KERN_ERR "%s: MDMA, cycleTime: %d, accessTime: %d, recTime: %d\n",
700 drive->name, cycleTime, accessTime, recTime);
701 #endif
702 }
703 switch(intf_type) {
704 case controller_sh_ata6: {
705 /* 133Mhz cell */
706 u32 tr = kauai_lookup_timing(shasta_mdma_timings, cycleTime);
707 *timings = ((*timings) & ~TR_133_PIOREG_MDMA_MASK) | tr;
708 *timings2 = (*timings2) & ~TR_133_UDMAREG_UDMA_EN;
709 }
710 break;
711 case controller_un_ata6:
712 case controller_k2_ata6: {
713 /* 100Mhz cell */
714 u32 tr = kauai_lookup_timing(kauai_mdma_timings, cycleTime);
715 *timings = ((*timings) & ~TR_100_PIOREG_MDMA_MASK) | tr;
716 *timings2 = (*timings2) & ~TR_100_UDMAREG_UDMA_EN;
717 }
718 break;
719 case controller_kl_ata4:
720 /* 66Mhz cell */
721 accessTicks = SYSCLK_TICKS_66(accessTime);
722 accessTicks = min(accessTicks, 0x1fU);
723 accessTicks = max(accessTicks, 0x1U);
724 recTicks = SYSCLK_TICKS_66(recTime);
725 recTicks = min(recTicks, 0x1fU);
726 recTicks = max(recTicks, 0x3U);
727 /* Clear out mdma bits and disable udma */
728 *timings = ((*timings) & ~(TR_66_MDMA_MASK | TR_66_UDMA_MASK)) |
729 (accessTicks << TR_66_MDMA_ACCESS_SHIFT) |
730 (recTicks << TR_66_MDMA_RECOVERY_SHIFT);
731 break;
732 case controller_kl_ata3:
733 /* 33Mhz cell on KeyLargo */
734 accessTicks = SYSCLK_TICKS(accessTime);
735 accessTicks = max(accessTicks, 1U);
736 accessTicks = min(accessTicks, 0x1fU);
737 accessTime = accessTicks * IDE_SYSCLK_NS;
738 recTicks = SYSCLK_TICKS(recTime);
739 recTicks = max(recTicks, 1U);
740 recTicks = min(recTicks, 0x1fU);
741 *timings = ((*timings) & ~TR_33_MDMA_MASK) |
742 (accessTicks << TR_33_MDMA_ACCESS_SHIFT) |
743 (recTicks << TR_33_MDMA_RECOVERY_SHIFT);
744 break;
745 default: {
746 /* 33Mhz cell on others */
747 int halfTick = 0;
748 int origAccessTime = accessTime;
749 int origRecTime = recTime;
750
751 accessTicks = SYSCLK_TICKS(accessTime);
752 accessTicks = max(accessTicks, 1U);
753 accessTicks = min(accessTicks, 0x1fU);
754 accessTime = accessTicks * IDE_SYSCLK_NS;
755 recTicks = SYSCLK_TICKS(recTime);
756 recTicks = max(recTicks, 2U) - 1;
757 recTicks = min(recTicks, 0x1fU);
758 recTime = (recTicks + 1) * IDE_SYSCLK_NS;
759 if ((accessTicks > 1) &&
760 ((accessTime - IDE_SYSCLK_NS/2) >= origAccessTime) &&
761 ((recTime - IDE_SYSCLK_NS/2) >= origRecTime)) {
762 halfTick = 1;
763 accessTicks--;
764 }
765 *timings = ((*timings) & ~TR_33_MDMA_MASK) |
766 (accessTicks << TR_33_MDMA_ACCESS_SHIFT) |
767 (recTicks << TR_33_MDMA_RECOVERY_SHIFT);
768 if (halfTick)
769 *timings |= TR_33_MDMA_HALFTICK;
770 }
771 }
772 #ifdef IDE_PMAC_DEBUG
773 printk(KERN_ERR "%s: Set MDMA timing for mode %d, reg: 0x%08x\n",
774 drive->name, speed & 0xf, *timings);
775 #endif
776 }
777
pmac_ide_set_dma_mode(ide_hwif_t * hwif,ide_drive_t * drive)778 static void pmac_ide_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
779 {
780 pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
781 int ret = 0;
782 u32 *timings, *timings2, tl[2];
783 u8 unit = drive->dn & 1;
784 const u8 speed = drive->dma_mode;
785
786 timings = &pmif->timings[unit];
787 timings2 = &pmif->timings[unit+2];
788
789 /* Copy timings to local image */
790 tl[0] = *timings;
791 tl[1] = *timings2;
792
793 if (speed >= XFER_UDMA_0) {
794 if (pmif->kind == controller_kl_ata4)
795 ret = set_timings_udma_ata4(&tl[0], speed);
796 else if (pmif->kind == controller_un_ata6
797 || pmif->kind == controller_k2_ata6)
798 ret = set_timings_udma_ata6(&tl[0], &tl[1], speed);
799 else if (pmif->kind == controller_sh_ata6)
800 ret = set_timings_udma_shasta(&tl[0], &tl[1], speed);
801 else
802 ret = -1;
803 } else
804 set_timings_mdma(drive, pmif->kind, &tl[0], &tl[1], speed);
805
806 if (ret)
807 return;
808
809 /* Apply timings to controller */
810 *timings = tl[0];
811 *timings2 = tl[1];
812
813 pmac_ide_do_update_timings(drive);
814 }
815
816 /*
817 * Blast some well known "safe" values to the timing registers at init or
818 * wakeup from sleep time, before we do real calculation
819 */
820 static void
sanitize_timings(pmac_ide_hwif_t * pmif)821 sanitize_timings(pmac_ide_hwif_t *pmif)
822 {
823 unsigned int value, value2 = 0;
824
825 switch(pmif->kind) {
826 case controller_sh_ata6:
827 value = 0x0a820c97;
828 value2 = 0x00033031;
829 break;
830 case controller_un_ata6:
831 case controller_k2_ata6:
832 value = 0x08618a92;
833 value2 = 0x00002921;
834 break;
835 case controller_kl_ata4:
836 value = 0x0008438c;
837 break;
838 case controller_kl_ata3:
839 value = 0x00084526;
840 break;
841 case controller_heathrow:
842 case controller_ohare:
843 default:
844 value = 0x00074526;
845 break;
846 }
847 pmif->timings[0] = pmif->timings[1] = value;
848 pmif->timings[2] = pmif->timings[3] = value2;
849 }
850
on_media_bay(pmac_ide_hwif_t * pmif)851 static int on_media_bay(pmac_ide_hwif_t *pmif)
852 {
853 return pmif->mdev && pmif->mdev->media_bay != NULL;
854 }
855
856 /* Suspend call back, should be called after the child devices
857 * have actually been suspended
858 */
pmac_ide_do_suspend(pmac_ide_hwif_t * pmif)859 static int pmac_ide_do_suspend(pmac_ide_hwif_t *pmif)
860 {
861 /* We clear the timings */
862 pmif->timings[0] = 0;
863 pmif->timings[1] = 0;
864
865 disable_irq(pmif->irq);
866
867 /* The media bay will handle itself just fine */
868 if (on_media_bay(pmif))
869 return 0;
870
871 /* Kauai has bus control FCRs directly here */
872 if (pmif->kauai_fcr) {
873 u32 fcr = readl(pmif->kauai_fcr);
874 fcr &= ~(KAUAI_FCR_UATA_RESET_N | KAUAI_FCR_UATA_ENABLE);
875 writel(fcr, pmif->kauai_fcr);
876 }
877
878 /* Disable the bus on older machines and the cell on kauai */
879 ppc_md.feature_call(PMAC_FTR_IDE_ENABLE, pmif->node, pmif->aapl_bus_id,
880 0);
881
882 return 0;
883 }
884
885 /* Resume call back, should be called before the child devices
886 * are resumed
887 */
pmac_ide_do_resume(pmac_ide_hwif_t * pmif)888 static int pmac_ide_do_resume(pmac_ide_hwif_t *pmif)
889 {
890 /* Hard reset & re-enable controller (do we really need to reset ? -BenH) */
891 if (!on_media_bay(pmif)) {
892 ppc_md.feature_call(PMAC_FTR_IDE_RESET, pmif->node, pmif->aapl_bus_id, 1);
893 ppc_md.feature_call(PMAC_FTR_IDE_ENABLE, pmif->node, pmif->aapl_bus_id, 1);
894 msleep(10);
895 ppc_md.feature_call(PMAC_FTR_IDE_RESET, pmif->node, pmif->aapl_bus_id, 0);
896
897 /* Kauai has it different */
898 if (pmif->kauai_fcr) {
899 u32 fcr = readl(pmif->kauai_fcr);
900 fcr |= KAUAI_FCR_UATA_RESET_N | KAUAI_FCR_UATA_ENABLE;
901 writel(fcr, pmif->kauai_fcr);
902 }
903
904 msleep(jiffies_to_msecs(IDE_WAKEUP_DELAY));
905 }
906
907 /* Sanitize drive timings */
908 sanitize_timings(pmif);
909
910 enable_irq(pmif->irq);
911
912 return 0;
913 }
914
pmac_ide_cable_detect(ide_hwif_t * hwif)915 static u8 pmac_ide_cable_detect(ide_hwif_t *hwif)
916 {
917 pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
918 struct device_node *np = pmif->node;
919 const char *cable = of_get_property(np, "cable-type", NULL);
920 struct device_node *root = of_find_node_by_path("/");
921 const char *model = of_get_property(root, "model", NULL);
922
923 /* Get cable type from device-tree. */
924 if (cable && !strncmp(cable, "80-", 3)) {
925 /* Some drives fail to detect 80c cable in PowerBook */
926 /* These machine use proprietary short IDE cable anyway */
927 if (!strncmp(model, "PowerBook", 9))
928 return ATA_CBL_PATA40_SHORT;
929 else
930 return ATA_CBL_PATA80;
931 }
932
933 /*
934 * G5's seem to have incorrect cable type in device-tree.
935 * Let's assume they have a 80 conductor cable, this seem
936 * to be always the case unless the user mucked around.
937 */
938 if (of_device_is_compatible(np, "K2-UATA") ||
939 of_device_is_compatible(np, "shasta-ata"))
940 return ATA_CBL_PATA80;
941
942 return ATA_CBL_PATA40;
943 }
944
pmac_ide_init_dev(ide_drive_t * drive)945 static void pmac_ide_init_dev(ide_drive_t *drive)
946 {
947 ide_hwif_t *hwif = drive->hwif;
948 pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
949
950 if (on_media_bay(pmif)) {
951 if (check_media_bay(pmif->mdev->media_bay) == MB_CD) {
952 drive->dev_flags &= ~IDE_DFLAG_NOPROBE;
953 return;
954 }
955 drive->dev_flags |= IDE_DFLAG_NOPROBE;
956 }
957 }
958
959 static const struct ide_tp_ops pmac_tp_ops = {
960 .exec_command = pmac_exec_command,
961 .read_status = ide_read_status,
962 .read_altstatus = ide_read_altstatus,
963 .write_devctl = pmac_write_devctl,
964
965 .dev_select = pmac_dev_select,
966 .tf_load = ide_tf_load,
967 .tf_read = ide_tf_read,
968
969 .input_data = ide_input_data,
970 .output_data = ide_output_data,
971 };
972
973 static const struct ide_tp_ops pmac_ata6_tp_ops = {
974 .exec_command = pmac_exec_command,
975 .read_status = ide_read_status,
976 .read_altstatus = ide_read_altstatus,
977 .write_devctl = pmac_write_devctl,
978
979 .dev_select = pmac_kauai_dev_select,
980 .tf_load = ide_tf_load,
981 .tf_read = ide_tf_read,
982
983 .input_data = ide_input_data,
984 .output_data = ide_output_data,
985 };
986
987 static const struct ide_port_ops pmac_ide_ata4_port_ops = {
988 .init_dev = pmac_ide_init_dev,
989 .set_pio_mode = pmac_ide_set_pio_mode,
990 .set_dma_mode = pmac_ide_set_dma_mode,
991 .cable_detect = pmac_ide_cable_detect,
992 };
993
994 static const struct ide_port_ops pmac_ide_port_ops = {
995 .init_dev = pmac_ide_init_dev,
996 .set_pio_mode = pmac_ide_set_pio_mode,
997 .set_dma_mode = pmac_ide_set_dma_mode,
998 };
999
1000 static const struct ide_dma_ops pmac_dma_ops;
1001
1002 static const struct ide_port_info pmac_port_info = {
1003 .name = DRV_NAME,
1004 .init_dma = pmac_ide_init_dma,
1005 .chipset = ide_pmac,
1006 .tp_ops = &pmac_tp_ops,
1007 .port_ops = &pmac_ide_port_ops,
1008 .dma_ops = &pmac_dma_ops,
1009 .host_flags = IDE_HFLAG_SET_PIO_MODE_KEEP_DMA |
1010 IDE_HFLAG_POST_SET_MODE |
1011 IDE_HFLAG_MMIO |
1012 IDE_HFLAG_UNMASK_IRQS,
1013 .pio_mask = ATA_PIO4,
1014 .mwdma_mask = ATA_MWDMA2,
1015 };
1016
1017 /*
1018 * Setup, register & probe an IDE channel driven by this driver, this is
1019 * called by one of the 2 probe functions (macio or PCI).
1020 */
pmac_ide_setup_device(pmac_ide_hwif_t * pmif,struct ide_hw * hw)1021 static int pmac_ide_setup_device(pmac_ide_hwif_t *pmif, struct ide_hw *hw)
1022 {
1023 struct device_node *np = pmif->node;
1024 const int *bidp;
1025 struct ide_host *host;
1026 ide_hwif_t *hwif;
1027 struct ide_hw *hws[] = { hw };
1028 struct ide_port_info d = pmac_port_info;
1029 int rc;
1030
1031 pmif->broken_dma = pmif->broken_dma_warn = 0;
1032 if (of_device_is_compatible(np, "shasta-ata")) {
1033 pmif->kind = controller_sh_ata6;
1034 d.tp_ops = &pmac_ata6_tp_ops;
1035 d.port_ops = &pmac_ide_ata4_port_ops;
1036 d.udma_mask = ATA_UDMA6;
1037 } else if (of_device_is_compatible(np, "kauai-ata")) {
1038 pmif->kind = controller_un_ata6;
1039 d.tp_ops = &pmac_ata6_tp_ops;
1040 d.port_ops = &pmac_ide_ata4_port_ops;
1041 d.udma_mask = ATA_UDMA5;
1042 } else if (of_device_is_compatible(np, "K2-UATA")) {
1043 pmif->kind = controller_k2_ata6;
1044 d.tp_ops = &pmac_ata6_tp_ops;
1045 d.port_ops = &pmac_ide_ata4_port_ops;
1046 d.udma_mask = ATA_UDMA5;
1047 } else if (of_device_is_compatible(np, "keylargo-ata")) {
1048 if (strcmp(np->name, "ata-4") == 0) {
1049 pmif->kind = controller_kl_ata4;
1050 d.port_ops = &pmac_ide_ata4_port_ops;
1051 d.udma_mask = ATA_UDMA4;
1052 } else
1053 pmif->kind = controller_kl_ata3;
1054 } else if (of_device_is_compatible(np, "heathrow-ata")) {
1055 pmif->kind = controller_heathrow;
1056 } else {
1057 pmif->kind = controller_ohare;
1058 pmif->broken_dma = 1;
1059 }
1060
1061 bidp = of_get_property(np, "AAPL,bus-id", NULL);
1062 pmif->aapl_bus_id = bidp ? *bidp : 0;
1063
1064 /* On Kauai-type controllers, we make sure the FCR is correct */
1065 if (pmif->kauai_fcr)
1066 writel(KAUAI_FCR_UATA_MAGIC |
1067 KAUAI_FCR_UATA_RESET_N |
1068 KAUAI_FCR_UATA_ENABLE, pmif->kauai_fcr);
1069
1070 /* Make sure we have sane timings */
1071 sanitize_timings(pmif);
1072
1073 /* If we are on a media bay, wait for it to settle and lock it */
1074 if (pmif->mdev)
1075 lock_media_bay(pmif->mdev->media_bay);
1076
1077 host = ide_host_alloc(&d, hws, 1);
1078 if (host == NULL) {
1079 rc = -ENOMEM;
1080 goto bail;
1081 }
1082 hwif = pmif->hwif = host->ports[0];
1083
1084 if (on_media_bay(pmif)) {
1085 /* Fixup bus ID for media bay */
1086 if (!bidp)
1087 pmif->aapl_bus_id = 1;
1088 } else if (pmif->kind == controller_ohare) {
1089 /* The code below is having trouble on some ohare machines
1090 * (timing related ?). Until I can put my hand on one of these
1091 * units, I keep the old way
1092 */
1093 ppc_md.feature_call(PMAC_FTR_IDE_ENABLE, np, 0, 1);
1094 } else {
1095 /* This is necessary to enable IDE when net-booting */
1096 ppc_md.feature_call(PMAC_FTR_IDE_RESET, np, pmif->aapl_bus_id, 1);
1097 ppc_md.feature_call(PMAC_FTR_IDE_ENABLE, np, pmif->aapl_bus_id, 1);
1098 msleep(10);
1099 ppc_md.feature_call(PMAC_FTR_IDE_RESET, np, pmif->aapl_bus_id, 0);
1100 msleep(jiffies_to_msecs(IDE_WAKEUP_DELAY));
1101 }
1102
1103 printk(KERN_INFO DRV_NAME ": Found Apple %s controller (%s), "
1104 "bus ID %d%s, irq %d\n", model_name[pmif->kind],
1105 pmif->mdev ? "macio" : "PCI", pmif->aapl_bus_id,
1106 on_media_bay(pmif) ? " (mediabay)" : "", hw->irq);
1107
1108 rc = ide_host_register(host, &d, hws);
1109 if (rc)
1110 pmif->hwif = NULL;
1111
1112 if (pmif->mdev)
1113 unlock_media_bay(pmif->mdev->media_bay);
1114
1115 bail:
1116 if (rc && host)
1117 ide_host_free(host);
1118 return rc;
1119 }
1120
pmac_ide_init_ports(struct ide_hw * hw,unsigned long base)1121 static void pmac_ide_init_ports(struct ide_hw *hw, unsigned long base)
1122 {
1123 int i;
1124
1125 for (i = 0; i < 8; ++i)
1126 hw->io_ports_array[i] = base + i * 0x10;
1127
1128 hw->io_ports.ctl_addr = base + 0x160;
1129 }
1130
1131 /*
1132 * Attach to a macio probed interface
1133 */
pmac_ide_macio_attach(struct macio_dev * mdev,const struct of_device_id * match)1134 static int pmac_ide_macio_attach(struct macio_dev *mdev,
1135 const struct of_device_id *match)
1136 {
1137 void __iomem *base;
1138 unsigned long regbase;
1139 pmac_ide_hwif_t *pmif;
1140 int irq, rc;
1141 struct ide_hw hw;
1142
1143 pmif = kzalloc(sizeof(*pmif), GFP_KERNEL);
1144 if (pmif == NULL)
1145 return -ENOMEM;
1146
1147 if (macio_resource_count(mdev) == 0) {
1148 printk(KERN_WARNING "ide-pmac: no address for %pOF\n",
1149 mdev->ofdev.dev.of_node);
1150 rc = -ENXIO;
1151 goto out_free_pmif;
1152 }
1153
1154 /* Request memory resource for IO ports */
1155 if (macio_request_resource(mdev, 0, "ide-pmac (ports)")) {
1156 printk(KERN_ERR "ide-pmac: can't request MMIO resource for "
1157 "%pOF!\n", mdev->ofdev.dev.of_node);
1158 rc = -EBUSY;
1159 goto out_free_pmif;
1160 }
1161
1162 /* XXX This is bogus. Should be fixed in the registry by checking
1163 * the kind of host interrupt controller, a bit like gatwick
1164 * fixes in irq.c. That works well enough for the single case
1165 * where that happens though...
1166 */
1167 if (macio_irq_count(mdev) == 0) {
1168 printk(KERN_WARNING "ide-pmac: no intrs for device %pOF, using "
1169 "13\n", mdev->ofdev.dev.of_node);
1170 irq = irq_create_mapping(NULL, 13);
1171 } else
1172 irq = macio_irq(mdev, 0);
1173
1174 base = ioremap(macio_resource_start(mdev, 0), 0x400);
1175 regbase = (unsigned long) base;
1176
1177 pmif->mdev = mdev;
1178 pmif->node = mdev->ofdev.dev.of_node;
1179 pmif->regbase = regbase;
1180 pmif->irq = irq;
1181 pmif->kauai_fcr = NULL;
1182
1183 if (macio_resource_count(mdev) >= 2) {
1184 if (macio_request_resource(mdev, 1, "ide-pmac (dma)"))
1185 printk(KERN_WARNING "ide-pmac: can't request DMA "
1186 "resource for %pOF!\n",
1187 mdev->ofdev.dev.of_node);
1188 else
1189 pmif->dma_regs = ioremap(macio_resource_start(mdev, 1), 0x1000);
1190 } else
1191 pmif->dma_regs = NULL;
1192
1193 dev_set_drvdata(&mdev->ofdev.dev, pmif);
1194
1195 memset(&hw, 0, sizeof(hw));
1196 pmac_ide_init_ports(&hw, pmif->regbase);
1197 hw.irq = irq;
1198 hw.dev = &mdev->bus->pdev->dev;
1199 hw.parent = &mdev->ofdev.dev;
1200
1201 rc = pmac_ide_setup_device(pmif, &hw);
1202 if (rc != 0) {
1203 /* The inteface is released to the common IDE layer */
1204 dev_set_drvdata(&mdev->ofdev.dev, NULL);
1205 iounmap(base);
1206 if (pmif->dma_regs) {
1207 iounmap(pmif->dma_regs);
1208 macio_release_resource(mdev, 1);
1209 }
1210 macio_release_resource(mdev, 0);
1211 kfree(pmif);
1212 }
1213
1214 return rc;
1215
1216 out_free_pmif:
1217 kfree(pmif);
1218 return rc;
1219 }
1220
1221 static int
pmac_ide_macio_suspend(struct macio_dev * mdev,pm_message_t mesg)1222 pmac_ide_macio_suspend(struct macio_dev *mdev, pm_message_t mesg)
1223 {
1224 pmac_ide_hwif_t *pmif = dev_get_drvdata(&mdev->ofdev.dev);
1225 int rc = 0;
1226
1227 if (mesg.event != mdev->ofdev.dev.power.power_state.event
1228 && (mesg.event & PM_EVENT_SLEEP)) {
1229 rc = pmac_ide_do_suspend(pmif);
1230 if (rc == 0)
1231 mdev->ofdev.dev.power.power_state = mesg;
1232 }
1233
1234 return rc;
1235 }
1236
1237 static int
pmac_ide_macio_resume(struct macio_dev * mdev)1238 pmac_ide_macio_resume(struct macio_dev *mdev)
1239 {
1240 pmac_ide_hwif_t *pmif = dev_get_drvdata(&mdev->ofdev.dev);
1241 int rc = 0;
1242
1243 if (mdev->ofdev.dev.power.power_state.event != PM_EVENT_ON) {
1244 rc = pmac_ide_do_resume(pmif);
1245 if (rc == 0)
1246 mdev->ofdev.dev.power.power_state = PMSG_ON;
1247 }
1248
1249 return rc;
1250 }
1251
1252 /*
1253 * Attach to a PCI probed interface
1254 */
pmac_ide_pci_attach(struct pci_dev * pdev,const struct pci_device_id * id)1255 static int pmac_ide_pci_attach(struct pci_dev *pdev,
1256 const struct pci_device_id *id)
1257 {
1258 struct device_node *np;
1259 pmac_ide_hwif_t *pmif;
1260 void __iomem *base;
1261 unsigned long rbase, rlen;
1262 int rc;
1263 struct ide_hw hw;
1264
1265 np = pci_device_to_OF_node(pdev);
1266 if (np == NULL) {
1267 printk(KERN_ERR "ide-pmac: cannot find MacIO node for Kauai ATA interface\n");
1268 return -ENODEV;
1269 }
1270
1271 pmif = kzalloc(sizeof(*pmif), GFP_KERNEL);
1272 if (pmif == NULL)
1273 return -ENOMEM;
1274
1275 if (pci_enable_device(pdev)) {
1276 printk(KERN_WARNING "ide-pmac: Can't enable PCI device for "
1277 "%pOF\n", np);
1278 rc = -ENXIO;
1279 goto out_free_pmif;
1280 }
1281 pci_set_master(pdev);
1282
1283 if (pci_request_regions(pdev, "Kauai ATA")) {
1284 printk(KERN_ERR "ide-pmac: Cannot obtain PCI resources for "
1285 "%pOF\n", np);
1286 rc = -ENXIO;
1287 goto out_free_pmif;
1288 }
1289
1290 pmif->mdev = NULL;
1291 pmif->node = np;
1292
1293 rbase = pci_resource_start(pdev, 0);
1294 rlen = pci_resource_len(pdev, 0);
1295
1296 base = ioremap(rbase, rlen);
1297 pmif->regbase = (unsigned long) base + 0x2000;
1298 pmif->dma_regs = base + 0x1000;
1299 pmif->kauai_fcr = base;
1300 pmif->irq = pdev->irq;
1301
1302 pci_set_drvdata(pdev, pmif);
1303
1304 memset(&hw, 0, sizeof(hw));
1305 pmac_ide_init_ports(&hw, pmif->regbase);
1306 hw.irq = pdev->irq;
1307 hw.dev = &pdev->dev;
1308
1309 rc = pmac_ide_setup_device(pmif, &hw);
1310 if (rc != 0) {
1311 /* The inteface is released to the common IDE layer */
1312 iounmap(base);
1313 pci_release_regions(pdev);
1314 kfree(pmif);
1315 }
1316
1317 return rc;
1318
1319 out_free_pmif:
1320 kfree(pmif);
1321 return rc;
1322 }
1323
1324 static int
pmac_ide_pci_suspend(struct pci_dev * pdev,pm_message_t mesg)1325 pmac_ide_pci_suspend(struct pci_dev *pdev, pm_message_t mesg)
1326 {
1327 pmac_ide_hwif_t *pmif = pci_get_drvdata(pdev);
1328 int rc = 0;
1329
1330 if (mesg.event != pdev->dev.power.power_state.event
1331 && (mesg.event & PM_EVENT_SLEEP)) {
1332 rc = pmac_ide_do_suspend(pmif);
1333 if (rc == 0)
1334 pdev->dev.power.power_state = mesg;
1335 }
1336
1337 return rc;
1338 }
1339
1340 static int
pmac_ide_pci_resume(struct pci_dev * pdev)1341 pmac_ide_pci_resume(struct pci_dev *pdev)
1342 {
1343 pmac_ide_hwif_t *pmif = pci_get_drvdata(pdev);
1344 int rc = 0;
1345
1346 if (pdev->dev.power.power_state.event != PM_EVENT_ON) {
1347 rc = pmac_ide_do_resume(pmif);
1348 if (rc == 0)
1349 pdev->dev.power.power_state = PMSG_ON;
1350 }
1351
1352 return rc;
1353 }
1354
1355 #ifdef CONFIG_PMAC_MEDIABAY
pmac_ide_macio_mb_event(struct macio_dev * mdev,int mb_state)1356 static void pmac_ide_macio_mb_event(struct macio_dev* mdev, int mb_state)
1357 {
1358 pmac_ide_hwif_t *pmif = dev_get_drvdata(&mdev->ofdev.dev);
1359
1360 switch(mb_state) {
1361 case MB_CD:
1362 if (!pmif->hwif->present)
1363 ide_port_scan(pmif->hwif);
1364 break;
1365 default:
1366 if (pmif->hwif->present)
1367 ide_port_unregister_devices(pmif->hwif);
1368 }
1369 }
1370 #endif /* CONFIG_PMAC_MEDIABAY */
1371
1372
1373 static struct of_device_id pmac_ide_macio_match[] =
1374 {
1375 {
1376 .name = "IDE",
1377 },
1378 {
1379 .name = "ATA",
1380 },
1381 {
1382 .type = "ide",
1383 },
1384 {
1385 .type = "ata",
1386 },
1387 {},
1388 };
1389
1390 static struct macio_driver pmac_ide_macio_driver =
1391 {
1392 .driver = {
1393 .name = "ide-pmac",
1394 .owner = THIS_MODULE,
1395 .of_match_table = pmac_ide_macio_match,
1396 },
1397 .probe = pmac_ide_macio_attach,
1398 .suspend = pmac_ide_macio_suspend,
1399 .resume = pmac_ide_macio_resume,
1400 #ifdef CONFIG_PMAC_MEDIABAY
1401 .mediabay_event = pmac_ide_macio_mb_event,
1402 #endif
1403 };
1404
1405 static const struct pci_device_id pmac_ide_pci_match[] = {
1406 { PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_UNI_N_ATA), 0 },
1407 { PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_IPID_ATA100), 0 },
1408 { PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_K2_ATA100), 0 },
1409 { PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_SH_ATA), 0 },
1410 { PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_IPID2_ATA), 0 },
1411 {},
1412 };
1413
1414 static struct pci_driver pmac_ide_pci_driver = {
1415 .name = "ide-pmac",
1416 .id_table = pmac_ide_pci_match,
1417 .probe = pmac_ide_pci_attach,
1418 .suspend = pmac_ide_pci_suspend,
1419 .resume = pmac_ide_pci_resume,
1420 };
1421 MODULE_DEVICE_TABLE(pci, pmac_ide_pci_match);
1422
pmac_ide_probe(void)1423 int __init pmac_ide_probe(void)
1424 {
1425 int error;
1426
1427 if (!machine_is(powermac))
1428 return -ENODEV;
1429
1430 #ifdef CONFIG_BLK_DEV_IDE_PMAC_ATA100FIRST
1431 error = pci_register_driver(&pmac_ide_pci_driver);
1432 if (error)
1433 goto out;
1434 error = macio_register_driver(&pmac_ide_macio_driver);
1435 if (error) {
1436 pci_unregister_driver(&pmac_ide_pci_driver);
1437 goto out;
1438 }
1439 #else
1440 error = macio_register_driver(&pmac_ide_macio_driver);
1441 if (error)
1442 goto out;
1443 error = pci_register_driver(&pmac_ide_pci_driver);
1444 if (error) {
1445 macio_unregister_driver(&pmac_ide_macio_driver);
1446 goto out;
1447 }
1448 #endif
1449 out:
1450 return error;
1451 }
1452
1453 /*
1454 * pmac_ide_build_dmatable builds the DBDMA command list
1455 * for a transfer and sets the DBDMA channel to point to it.
1456 */
pmac_ide_build_dmatable(ide_drive_t * drive,struct ide_cmd * cmd)1457 static int pmac_ide_build_dmatable(ide_drive_t *drive, struct ide_cmd *cmd)
1458 {
1459 ide_hwif_t *hwif = drive->hwif;
1460 pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
1461 struct dbdma_cmd *table;
1462 volatile struct dbdma_regs __iomem *dma = pmif->dma_regs;
1463 struct scatterlist *sg;
1464 int wr = !!(cmd->tf_flags & IDE_TFLAG_WRITE);
1465 int i = cmd->sg_nents, count = 0;
1466
1467 /* DMA table is already aligned */
1468 table = (struct dbdma_cmd *) pmif->dma_table_cpu;
1469
1470 /* Make sure DMA controller is stopped (necessary ?) */
1471 writel((RUN|PAUSE|FLUSH|WAKE|DEAD) << 16, &dma->control);
1472 while (readl(&dma->status) & RUN)
1473 udelay(1);
1474
1475 /* Build DBDMA commands list */
1476 sg = hwif->sg_table;
1477 while (i && sg_dma_len(sg)) {
1478 u32 cur_addr;
1479 u32 cur_len;
1480
1481 cur_addr = sg_dma_address(sg);
1482 cur_len = sg_dma_len(sg);
1483
1484 if (pmif->broken_dma && cur_addr & (L1_CACHE_BYTES - 1)) {
1485 if (pmif->broken_dma_warn == 0) {
1486 printk(KERN_WARNING "%s: DMA on non aligned address, "
1487 "switching to PIO on Ohare chipset\n", drive->name);
1488 pmif->broken_dma_warn = 1;
1489 }
1490 return 0;
1491 }
1492 while (cur_len) {
1493 unsigned int tc = (cur_len < 0xfe00)? cur_len: 0xfe00;
1494
1495 if (count++ >= MAX_DCMDS) {
1496 printk(KERN_WARNING "%s: DMA table too small\n",
1497 drive->name);
1498 return 0;
1499 }
1500 table->command = cpu_to_le16(wr? OUTPUT_MORE: INPUT_MORE);
1501 table->req_count = cpu_to_le16(tc);
1502 table->phy_addr = cpu_to_le32(cur_addr);
1503 table->cmd_dep = 0;
1504 table->xfer_status = 0;
1505 table->res_count = 0;
1506 cur_addr += tc;
1507 cur_len -= tc;
1508 ++table;
1509 }
1510 sg = sg_next(sg);
1511 i--;
1512 }
1513
1514 /* convert the last command to an input/output last command */
1515 if (count) {
1516 table[-1].command = cpu_to_le16(wr? OUTPUT_LAST: INPUT_LAST);
1517 /* add the stop command to the end of the list */
1518 memset(table, 0, sizeof(struct dbdma_cmd));
1519 table->command = cpu_to_le16(DBDMA_STOP);
1520 mb();
1521 writel(hwif->dmatable_dma, &dma->cmdptr);
1522 return 1;
1523 }
1524
1525 printk(KERN_DEBUG "%s: empty DMA table?\n", drive->name);
1526
1527 return 0; /* revert to PIO for this request */
1528 }
1529
1530 /*
1531 * Prepare a DMA transfer. We build the DMA table, adjust the timings for
1532 * a read on KeyLargo ATA/66 and mark us as waiting for DMA completion
1533 */
pmac_ide_dma_setup(ide_drive_t * drive,struct ide_cmd * cmd)1534 static int pmac_ide_dma_setup(ide_drive_t *drive, struct ide_cmd *cmd)
1535 {
1536 ide_hwif_t *hwif = drive->hwif;
1537 pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
1538 u8 unit = drive->dn & 1, ata4 = (pmif->kind == controller_kl_ata4);
1539 u8 write = !!(cmd->tf_flags & IDE_TFLAG_WRITE);
1540
1541 if (pmac_ide_build_dmatable(drive, cmd) == 0)
1542 return 1;
1543
1544 /* Apple adds 60ns to wrDataSetup on reads */
1545 if (ata4 && (pmif->timings[unit] & TR_66_UDMA_EN)) {
1546 writel(pmif->timings[unit] + (write ? 0 : 0x00800000UL),
1547 PMAC_IDE_REG(IDE_TIMING_CONFIG));
1548 (void)readl(PMAC_IDE_REG(IDE_TIMING_CONFIG));
1549 }
1550
1551 return 0;
1552 }
1553
1554 /*
1555 * Kick the DMA controller into life after the DMA command has been issued
1556 * to the drive.
1557 */
1558 static void
pmac_ide_dma_start(ide_drive_t * drive)1559 pmac_ide_dma_start(ide_drive_t *drive)
1560 {
1561 ide_hwif_t *hwif = drive->hwif;
1562 pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
1563 volatile struct dbdma_regs __iomem *dma;
1564
1565 dma = pmif->dma_regs;
1566
1567 writel((RUN << 16) | RUN, &dma->control);
1568 /* Make sure it gets to the controller right now */
1569 (void)readl(&dma->control);
1570 }
1571
1572 /*
1573 * After a DMA transfer, make sure the controller is stopped
1574 */
1575 static int
pmac_ide_dma_end(ide_drive_t * drive)1576 pmac_ide_dma_end (ide_drive_t *drive)
1577 {
1578 ide_hwif_t *hwif = drive->hwif;
1579 pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
1580 volatile struct dbdma_regs __iomem *dma = pmif->dma_regs;
1581 u32 dstat;
1582
1583 dstat = readl(&dma->status);
1584 writel(((RUN|WAKE|DEAD) << 16), &dma->control);
1585
1586 /* verify good dma status. we don't check for ACTIVE beeing 0. We should...
1587 * in theory, but with ATAPI decices doing buffer underruns, that would
1588 * cause us to disable DMA, which isn't what we want
1589 */
1590 return (dstat & (RUN|DEAD)) != RUN;
1591 }
1592
1593 /*
1594 * Check out that the interrupt we got was for us. We can't always know this
1595 * for sure with those Apple interfaces (well, we could on the recent ones but
1596 * that's not implemented yet), on the other hand, we don't have shared interrupts
1597 * so it's not really a problem
1598 */
1599 static int
pmac_ide_dma_test_irq(ide_drive_t * drive)1600 pmac_ide_dma_test_irq (ide_drive_t *drive)
1601 {
1602 ide_hwif_t *hwif = drive->hwif;
1603 pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
1604 volatile struct dbdma_regs __iomem *dma = pmif->dma_regs;
1605 unsigned long status, timeout;
1606
1607 /* We have to things to deal with here:
1608 *
1609 * - The dbdma won't stop if the command was started
1610 * but completed with an error without transferring all
1611 * datas. This happens when bad blocks are met during
1612 * a multi-block transfer.
1613 *
1614 * - The dbdma fifo hasn't yet finished flushing to
1615 * to system memory when the disk interrupt occurs.
1616 *
1617 */
1618
1619 /* If ACTIVE is cleared, the STOP command have passed and
1620 * transfer is complete.
1621 */
1622 status = readl(&dma->status);
1623 if (!(status & ACTIVE))
1624 return 1;
1625
1626 /* If dbdma didn't execute the STOP command yet, the
1627 * active bit is still set. We consider that we aren't
1628 * sharing interrupts (which is hopefully the case with
1629 * those controllers) and so we just try to flush the
1630 * channel for pending data in the fifo
1631 */
1632 udelay(1);
1633 writel((FLUSH << 16) | FLUSH, &dma->control);
1634 timeout = 0;
1635 for (;;) {
1636 udelay(1);
1637 status = readl(&dma->status);
1638 if ((status & FLUSH) == 0)
1639 break;
1640 if (++timeout > 100) {
1641 printk(KERN_WARNING "ide%d, ide_dma_test_irq timeout flushing channel\n",
1642 hwif->index);
1643 break;
1644 }
1645 }
1646 return 1;
1647 }
1648
pmac_ide_dma_host_set(ide_drive_t * drive,int on)1649 static void pmac_ide_dma_host_set(ide_drive_t *drive, int on)
1650 {
1651 }
1652
1653 static void
pmac_ide_dma_lost_irq(ide_drive_t * drive)1654 pmac_ide_dma_lost_irq (ide_drive_t *drive)
1655 {
1656 ide_hwif_t *hwif = drive->hwif;
1657 pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
1658 volatile struct dbdma_regs __iomem *dma = pmif->dma_regs;
1659 unsigned long status = readl(&dma->status);
1660
1661 printk(KERN_ERR "ide-pmac lost interrupt, dma status: %lx\n", status);
1662 }
1663
1664 static const struct ide_dma_ops pmac_dma_ops = {
1665 .dma_host_set = pmac_ide_dma_host_set,
1666 .dma_setup = pmac_ide_dma_setup,
1667 .dma_start = pmac_ide_dma_start,
1668 .dma_end = pmac_ide_dma_end,
1669 .dma_test_irq = pmac_ide_dma_test_irq,
1670 .dma_lost_irq = pmac_ide_dma_lost_irq,
1671 };
1672
1673 /*
1674 * Allocate the data structures needed for using DMA with an interface
1675 * and fill the proper list of functions pointers
1676 */
pmac_ide_init_dma(ide_hwif_t * hwif,const struct ide_port_info * d)1677 static int pmac_ide_init_dma(ide_hwif_t *hwif, const struct ide_port_info *d)
1678 {
1679 pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
1680 struct pci_dev *dev = to_pci_dev(hwif->dev);
1681
1682 /* We won't need pci_dev if we switch to generic consistent
1683 * DMA routines ...
1684 */
1685 if (dev == NULL || pmif->dma_regs == 0)
1686 return -ENODEV;
1687 /*
1688 * Allocate space for the DBDMA commands.
1689 * The +2 is +1 for the stop command and +1 to allow for
1690 * aligning the start address to a multiple of 16 bytes.
1691 */
1692 pmif->dma_table_cpu = dma_alloc_coherent(&dev->dev,
1693 (MAX_DCMDS + 2) * sizeof(struct dbdma_cmd),
1694 &hwif->dmatable_dma, GFP_KERNEL);
1695 if (pmif->dma_table_cpu == NULL) {
1696 printk(KERN_ERR "%s: unable to allocate DMA command list\n",
1697 hwif->name);
1698 return -ENOMEM;
1699 }
1700
1701 hwif->sg_max_nents = MAX_DCMDS;
1702
1703 return 0;
1704 }
1705
1706 module_init(pmac_ide_probe);
1707
1708 MODULE_LICENSE("GPL");
1709
