2 * Support for IDE interfaces on PowerMacs.
4 * These IDE interfaces are memory-mapped and have a DBDMA channel
7 * Copyright (C) 1998-2003 Paul Mackerras & Ben. Herrenschmidt
8 * Copyright (C) 2007-2008 Bartlomiej Zolnierkiewicz
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.
15 * Some code taken from drivers/ide/ide-dma.c:
17 * Copyright (c) 1995-1998 Mark Lord
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
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>
41 #include <asm/dbdma.h>
43 #include <asm/machdep.h>
44 #include <asm/pmac_feature.h>
45 #include <asm/sections.h>
47 #include <asm/mediabay.h>
49 #define DRV_NAME "ide-pmac"
53 #define DMA_WAIT_TIMEOUT 50
55 typedef struct pmac_ide_hwif {
56 unsigned long regbase;
60 unsigned broken_dma : 1;
61 unsigned broken_dma_warn : 1;
62 struct device_node* node;
63 struct macio_dev *mdev;
65 volatile u32 __iomem * *kauai_fcr;
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.
73 volatile struct dbdma_regs __iomem * dma_regs;
74 struct dbdma_cmd* dma_table_cpu;
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 */
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) */
98 * Extra registers, both 32-bit little-endian
100 #define IDE_TIMING_CONFIG 0x200
101 #define IDE_INTERRUPT 0x300
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
109 * Timing configuration register definitions
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 */
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
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
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.
134 * So far, I'm using pre-calculated tables for this extracted from
135 * the values used by the MacOS X driver.
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
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
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)
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
162 * Apple also add 60ns to the write data setup (or cycle time ?) on
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
184 /* 33Mhz cell, found in OHare, Heathrow (& Paddington) and KeyLargo
185 * Can do pio & mdma modes, clock unit is 30ns (33Mhz)
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.
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
209 * Interrupt register definitions
211 #define IDE_INTR_DMA 0x80000000
212 #define IDE_INTR_DEVICE 0x40000000
215 * FCR Register on Kauai. Not sure what bit 0x4 is ...
217 #define KAUAI_FCR_UATA_MAGIC 0x00000004
218 #define KAUAI_FCR_UATA_RESET_N 0x00000002
219 #define KAUAI_FCR_UATA_ENABLE 0x00000001
221 /* Rounded Multiword DMA timings
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.
227 struct mdma_timings_t {
233 struct mdma_timings_t mdma_timings_33[] =
246 struct mdma_timings_t mdma_timings_33k[] =
259 struct mdma_timings_t mdma_timings_66[] =
272 /* KeyLargo ATA-4 Ultra DMA timings (rounded) */
274 int addrSetup; /* ??? */
277 } kl66_udma_timings[] =
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 */
286 /* UniNorth 2 ATA/100 timings */
287 struct kauai_timing {
292 static struct kauai_timing kauai_pio_timings[] =
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 },
308 static struct kauai_timing kauai_mdma_timings[] =
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 },
322 static struct kauai_timing kauai_udma_timings[] =
324 { 120 , 0x000070c0 },
333 static struct kauai_timing shasta_pio_timings[] =
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 },
349 static struct kauai_timing shasta_mdma_timings[] =
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 },
363 static struct kauai_timing shasta_udma133_timings[] =
365 { 120 , 0x00035901, },
366 { 90 , 0x000348b1, },
367 { 60 , 0x00033881, },
368 { 45 , 0x00033861, },
369 { 30 , 0x00033841, },
370 { 20 , 0x00033031, },
371 { 15 , 0x00033021, },
377 kauai_lookup_timing(struct kauai_timing* table, int cycle_time)
381 for (i=0; table[i].cycle_time; i++)
382 if (cycle_time > table[i+1].cycle_time)
383 return table[i].timing_reg;
388 /* allow up to 256 DBDMA commands per xfer */
389 #define MAX_DCMDS 256
392 * Wait 1s for disk to answer on IDE bus after a hard reset
393 * of the device (via GPIO/FCR).
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.
403 #define IDE_WAKEUP_DELAY (1*HZ)
405 static int pmac_ide_init_dma(ide_hwif_t *, const struct ide_port_info *);
407 #define PMAC_IDE_REG(x) \
408 ((void __iomem *)((drive)->hwif->io_ports.data_addr + (x)))
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
415 static void pmac_ide_apply_timings(ide_drive_t *drive)
417 ide_hwif_t *hwif = drive->hwif;
418 pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
421 writel(pmif->timings[1], PMAC_IDE_REG(IDE_TIMING_CONFIG));
423 writel(pmif->timings[0], PMAC_IDE_REG(IDE_TIMING_CONFIG));
424 (void)readl(PMAC_IDE_REG(IDE_TIMING_CONFIG));
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)
432 static void pmac_ide_kauai_apply_timings(ide_drive_t *drive)
434 ide_hwif_t *hwif = drive->hwif;
435 pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
438 writel(pmif->timings[1], PMAC_IDE_REG(IDE_KAUAI_PIO_CONFIG));
439 writel(pmif->timings[3], PMAC_IDE_REG(IDE_KAUAI_ULTRA_CONFIG));
441 writel(pmif->timings[0], PMAC_IDE_REG(IDE_KAUAI_PIO_CONFIG));
442 writel(pmif->timings[2], PMAC_IDE_REG(IDE_KAUAI_ULTRA_CONFIG));
444 (void)readl(PMAC_IDE_REG(IDE_KAUAI_PIO_CONFIG));
448 * Force an update of controller timing values for a given drive
451 pmac_ide_do_update_timings(ide_drive_t *drive)
453 ide_hwif_t *hwif = drive->hwif;
454 pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
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);
461 pmac_ide_apply_timings(drive);
464 static void pmac_dev_select(ide_drive_t *drive)
466 pmac_ide_apply_timings(drive);
468 writeb(drive->select | ATA_DEVICE_OBS,
469 (void __iomem *)drive->hwif->io_ports.device_addr);
472 static void pmac_kauai_dev_select(ide_drive_t *drive)
474 pmac_ide_kauai_apply_timings(drive);
476 writeb(drive->select | ATA_DEVICE_OBS,
477 (void __iomem *)drive->hwif->io_ports.device_addr);
480 static void pmac_exec_command(ide_hwif_t *hwif, u8 cmd)
482 writeb(cmd, (void __iomem *)hwif->io_ports.command_addr);
483 (void)readl((void __iomem *)(hwif->io_ports.data_addr
484 + IDE_TIMING_CONFIG));
487 static void pmac_write_devctl(ide_hwif_t *hwif, u8 ctl)
489 writeb(ctl, (void __iomem *)hwif->io_ports.ctl_addr);
490 (void)readl((void __iomem *)(hwif->io_ports.data_addr
491 + IDE_TIMING_CONFIG));
495 * Old tuning functions (called on hdparm -p), sets up drive PIO timings
497 static void pmac_ide_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
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);
503 unsigned accessTicks, recTicks;
504 unsigned accessTime, recTime;
505 unsigned int cycle_time;
507 /* which drive is it ? */
508 timings = &pmif->timings[drive->dn & 1];
511 cycle_time = ide_pio_cycle_time(drive, pio);
513 switch (pmif->kind) {
514 case controller_sh_ata6: {
516 u32 tr = kauai_lookup_timing(shasta_pio_timings, cycle_time);
517 t = (t & ~TR_133_PIOREG_PIO_MASK) | tr;
520 case controller_un_ata6:
521 case controller_k2_ata6: {
523 u32 tr = kauai_lookup_timing(kauai_pio_timings, cycle_time);
524 t = (t & ~TR_100_PIOREG_PIO_MASK) | tr;
527 case controller_kl_ata4:
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);
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;
555 recTicks--; /* guess, but it's only for PIO0, so... */
558 t = (t & ~TR_33_PIO_MASK) |
559 (accessTicks << TR_33_PIO_ACCESS_SHIFT) |
560 (recTicks << TR_33_PIO_RECOVERY_SHIFT);
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);
573 pmac_ide_do_update_timings(drive);
577 * Calculate KeyLargo ATA/66 UDMA timings
580 set_timings_udma_ata4(u32 *timings, u8 speed)
582 unsigned rdyToPauseTicks, wrDataSetupTicks, addrTicks;
584 if (speed > XFER_UDMA_4)
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);
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) |
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);
605 * Calculate Kauai ATA/100 UDMA timings
608 set_timings_udma_ata6(u32 *pio_timings, u32 *ultra_timings, u8 speed)
610 struct ide_timing *t = ide_timing_find_mode(speed);
613 if (speed > XFER_UDMA_5 || t == NULL)
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;
623 * Calculate Shasta ATA/133 UDMA timings
626 set_timings_udma_shasta(u32 *pio_timings, u32 *ultra_timings, u8 speed)
628 struct ide_timing *t = ide_timing_find_mode(speed);
631 if (speed > XFER_UDMA_6 || t == NULL)
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;
641 * Calculate MDMA timings for all cells
644 set_timings_mdma(ide_drive_t *drive, int intf_type, u32 *timings, u32 *timings2,
648 int cycleTime, accessTime = 0, recTime = 0;
649 unsigned accessTicks, recTicks;
650 struct mdma_timings_t* tm = NULL;
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;
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);
667 /* OHare limits according to some old Apple sources */
668 if ((intf_type == controller_ohare) && (cycleTime < 150))
670 /* Get the proper timing array for this controller */
672 case controller_sh_ata6:
673 case controller_un_ata6:
674 case controller_k2_ata6:
676 case controller_kl_ata4:
677 tm = mdma_timings_66;
679 case controller_kl_ata3:
680 tm = mdma_timings_33k;
683 tm = mdma_timings_33;
687 /* Lookup matching access & recovery times */
690 if (tm[i+1].cycleTime < cycleTime)
694 cycleTime = tm[i].cycleTime;
695 accessTime = tm[i].accessTime;
696 recTime = tm[i].recoveryTime;
698 #ifdef IDE_PMAC_DEBUG
699 printk(KERN_ERR "%s: MDMA, cycleTime: %d, accessTime: %d, recTime: %d\n",
700 drive->name, cycleTime, accessTime, recTime);
704 case controller_sh_ata6: {
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;
711 case controller_un_ata6:
712 case controller_k2_ata6: {
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;
719 case controller_kl_ata4:
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);
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);
746 /* 33Mhz cell on others */
748 int origAccessTime = accessTime;
749 int origRecTime = recTime;
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)) {
765 *timings = ((*timings) & ~TR_33_MDMA_MASK) |
766 (accessTicks << TR_33_MDMA_ACCESS_SHIFT) |
767 (recTicks << TR_33_MDMA_RECOVERY_SHIFT);
769 *timings |= TR_33_MDMA_HALFTICK;
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);
778 static void pmac_ide_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
780 pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
782 u32 *timings, *timings2, tl[2];
783 u8 unit = drive->dn & 1;
784 const u8 speed = drive->dma_mode;
786 timings = &pmif->timings[unit];
787 timings2 = &pmif->timings[unit+2];
789 /* Copy timings to local image */
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);
804 set_timings_mdma(drive, pmif->kind, &tl[0], &tl[1], speed);
809 /* Apply timings to controller */
813 pmac_ide_do_update_timings(drive);
817 * Blast some well known "safe" values to the timing registers at init or
818 * wakeup from sleep time, before we do real calculation
821 sanitize_timings(pmac_ide_hwif_t *pmif)
823 unsigned int value, value2 = 0;
826 case controller_sh_ata6:
830 case controller_un_ata6:
831 case controller_k2_ata6:
835 case controller_kl_ata4:
838 case controller_kl_ata3:
841 case controller_heathrow:
842 case controller_ohare:
847 pmif->timings[0] = pmif->timings[1] = value;
848 pmif->timings[2] = pmif->timings[3] = value2;
851 static int on_media_bay(pmac_ide_hwif_t *pmif)
853 return pmif->mdev && pmif->mdev->media_bay != NULL;
856 /* Suspend call back, should be called after the child devices
857 * have actually been suspended
859 static int pmac_ide_do_suspend(pmac_ide_hwif_t *pmif)
861 /* We clear the timings */
862 pmif->timings[0] = 0;
863 pmif->timings[1] = 0;
865 disable_irq(pmif->irq);
867 /* The media bay will handle itself just fine */
868 if (on_media_bay(pmif))
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);
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,
885 /* Resume call back, should be called before the child devices
888 static int pmac_ide_do_resume(pmac_ide_hwif_t *pmif)
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);
895 ppc_md.feature_call(PMAC_FTR_IDE_RESET, pmif->node, pmif->aapl_bus_id, 0);
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);
904 msleep(jiffies_to_msecs(IDE_WAKEUP_DELAY));
907 /* Sanitize drive timings */
908 sanitize_timings(pmif);
910 enable_irq(pmif->irq);
915 static u8 pmac_ide_cable_detect(ide_hwif_t *hwif)
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);
924 /* Get cable type from device-tree. */
925 if (cable && !strncmp(cable, "80-", 3)) {
926 /* Some drives fail to detect 80c cable in PowerBook */
927 /* These machine use proprietary short IDE cable anyway */
928 if (!strncmp(model, "PowerBook", 9))
929 return ATA_CBL_PATA40_SHORT;
931 return ATA_CBL_PATA80;
935 * G5's seem to have incorrect cable type in device-tree.
936 * Let's assume they have a 80 conductor cable, this seem
937 * to be always the case unless the user mucked around.
939 if (of_device_is_compatible(np, "K2-UATA") ||
940 of_device_is_compatible(np, "shasta-ata"))
941 return ATA_CBL_PATA80;
943 return ATA_CBL_PATA40;
946 static void pmac_ide_init_dev(ide_drive_t *drive)
948 ide_hwif_t *hwif = drive->hwif;
949 pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
951 if (on_media_bay(pmif)) {
952 if (check_media_bay(pmif->mdev->media_bay) == MB_CD) {
953 drive->dev_flags &= ~IDE_DFLAG_NOPROBE;
956 drive->dev_flags |= IDE_DFLAG_NOPROBE;
960 static const struct ide_tp_ops pmac_tp_ops = {
961 .exec_command = pmac_exec_command,
962 .read_status = ide_read_status,
963 .read_altstatus = ide_read_altstatus,
964 .write_devctl = pmac_write_devctl,
966 .dev_select = pmac_dev_select,
967 .tf_load = ide_tf_load,
968 .tf_read = ide_tf_read,
970 .input_data = ide_input_data,
971 .output_data = ide_output_data,
974 static const struct ide_tp_ops pmac_ata6_tp_ops = {
975 .exec_command = pmac_exec_command,
976 .read_status = ide_read_status,
977 .read_altstatus = ide_read_altstatus,
978 .write_devctl = pmac_write_devctl,
980 .dev_select = pmac_kauai_dev_select,
981 .tf_load = ide_tf_load,
982 .tf_read = ide_tf_read,
984 .input_data = ide_input_data,
985 .output_data = ide_output_data,
988 static const struct ide_port_ops pmac_ide_ata4_port_ops = {
989 .init_dev = pmac_ide_init_dev,
990 .set_pio_mode = pmac_ide_set_pio_mode,
991 .set_dma_mode = pmac_ide_set_dma_mode,
992 .cable_detect = pmac_ide_cable_detect,
995 static const struct ide_port_ops pmac_ide_port_ops = {
996 .init_dev = pmac_ide_init_dev,
997 .set_pio_mode = pmac_ide_set_pio_mode,
998 .set_dma_mode = pmac_ide_set_dma_mode,
1001 static const struct ide_dma_ops pmac_dma_ops;
1003 static const struct ide_port_info pmac_port_info = {
1005 .init_dma = pmac_ide_init_dma,
1006 .chipset = ide_pmac,
1007 .tp_ops = &pmac_tp_ops,
1008 .port_ops = &pmac_ide_port_ops,
1009 .dma_ops = &pmac_dma_ops,
1010 .host_flags = IDE_HFLAG_SET_PIO_MODE_KEEP_DMA |
1011 IDE_HFLAG_POST_SET_MODE |
1013 IDE_HFLAG_UNMASK_IRQS,
1014 .pio_mask = ATA_PIO4,
1015 .mwdma_mask = ATA_MWDMA2,
1019 * Setup, register & probe an IDE channel driven by this driver, this is
1020 * called by one of the 2 probe functions (macio or PCI).
1022 static int pmac_ide_setup_device(pmac_ide_hwif_t *pmif, struct ide_hw *hw)
1024 struct device_node *np = pmif->node;
1026 struct ide_host *host;
1028 struct ide_hw *hws[] = { hw };
1029 struct ide_port_info d = pmac_port_info;
1032 pmif->broken_dma = pmif->broken_dma_warn = 0;
1033 if (of_device_is_compatible(np, "shasta-ata")) {
1034 pmif->kind = controller_sh_ata6;
1035 d.tp_ops = &pmac_ata6_tp_ops;
1036 d.port_ops = &pmac_ide_ata4_port_ops;
1037 d.udma_mask = ATA_UDMA6;
1038 } else if (of_device_is_compatible(np, "kauai-ata")) {
1039 pmif->kind = controller_un_ata6;
1040 d.tp_ops = &pmac_ata6_tp_ops;
1041 d.port_ops = &pmac_ide_ata4_port_ops;
1042 d.udma_mask = ATA_UDMA5;
1043 } else if (of_device_is_compatible(np, "K2-UATA")) {
1044 pmif->kind = controller_k2_ata6;
1045 d.tp_ops = &pmac_ata6_tp_ops;
1046 d.port_ops = &pmac_ide_ata4_port_ops;
1047 d.udma_mask = ATA_UDMA5;
1048 } else if (of_device_is_compatible(np, "keylargo-ata")) {
1049 if (strcmp(np->name, "ata-4") == 0) {
1050 pmif->kind = controller_kl_ata4;
1051 d.port_ops = &pmac_ide_ata4_port_ops;
1052 d.udma_mask = ATA_UDMA4;
1054 pmif->kind = controller_kl_ata3;
1055 } else if (of_device_is_compatible(np, "heathrow-ata")) {
1056 pmif->kind = controller_heathrow;
1058 pmif->kind = controller_ohare;
1059 pmif->broken_dma = 1;
1062 bidp = of_get_property(np, "AAPL,bus-id", NULL);
1063 pmif->aapl_bus_id = bidp ? *bidp : 0;
1065 /* On Kauai-type controllers, we make sure the FCR is correct */
1066 if (pmif->kauai_fcr)
1067 writel(KAUAI_FCR_UATA_MAGIC |
1068 KAUAI_FCR_UATA_RESET_N |
1069 KAUAI_FCR_UATA_ENABLE, pmif->kauai_fcr);
1071 /* Make sure we have sane timings */
1072 sanitize_timings(pmif);
1074 /* If we are on a media bay, wait for it to settle and lock it */
1076 lock_media_bay(pmif->mdev->media_bay);
1078 host = ide_host_alloc(&d, hws, 1);
1083 hwif = pmif->hwif = host->ports[0];
1085 if (on_media_bay(pmif)) {
1086 /* Fixup bus ID for media bay */
1088 pmif->aapl_bus_id = 1;
1089 } else if (pmif->kind == controller_ohare) {
1090 /* The code below is having trouble on some ohare machines
1091 * (timing related ?). Until I can put my hand on one of these
1092 * units, I keep the old way
1094 ppc_md.feature_call(PMAC_FTR_IDE_ENABLE, np, 0, 1);
1096 /* This is necessary to enable IDE when net-booting */
1097 ppc_md.feature_call(PMAC_FTR_IDE_RESET, np, pmif->aapl_bus_id, 1);
1098 ppc_md.feature_call(PMAC_FTR_IDE_ENABLE, np, pmif->aapl_bus_id, 1);
1100 ppc_md.feature_call(PMAC_FTR_IDE_RESET, np, pmif->aapl_bus_id, 0);
1101 msleep(jiffies_to_msecs(IDE_WAKEUP_DELAY));
1104 printk(KERN_INFO DRV_NAME ": Found Apple %s controller (%s), "
1105 "bus ID %d%s, irq %d\n", model_name[pmif->kind],
1106 pmif->mdev ? "macio" : "PCI", pmif->aapl_bus_id,
1107 on_media_bay(pmif) ? " (mediabay)" : "", hw->irq);
1109 rc = ide_host_register(host, &d, hws);
1114 unlock_media_bay(pmif->mdev->media_bay);
1118 ide_host_free(host);
1122 static void pmac_ide_init_ports(struct ide_hw *hw, unsigned long base)
1126 for (i = 0; i < 8; ++i)
1127 hw->io_ports_array[i] = base + i * 0x10;
1129 hw->io_ports.ctl_addr = base + 0x160;
1133 * Attach to a macio probed interface
1135 static int pmac_ide_macio_attach(struct macio_dev *mdev,
1136 const struct of_device_id *match)
1139 unsigned long regbase;
1140 pmac_ide_hwif_t *pmif;
1144 pmif = kzalloc(sizeof(*pmif), GFP_KERNEL);
1148 if (macio_resource_count(mdev) == 0) {
1149 printk(KERN_WARNING "ide-pmac: no address for %pOF\n",
1150 mdev->ofdev.dev.of_node);
1155 /* Request memory resource for IO ports */
1156 if (macio_request_resource(mdev, 0, "ide-pmac (ports)")) {
1157 printk(KERN_ERR "ide-pmac: can't request MMIO resource for "
1158 "%pOF!\n", mdev->ofdev.dev.of_node);
1163 /* XXX This is bogus. Should be fixed in the registry by checking
1164 * the kind of host interrupt controller, a bit like gatwick
1165 * fixes in irq.c. That works well enough for the single case
1166 * where that happens though...
1168 if (macio_irq_count(mdev) == 0) {
1169 printk(KERN_WARNING "ide-pmac: no intrs for device %pOF, using "
1170 "13\n", mdev->ofdev.dev.of_node);
1171 irq = irq_create_mapping(NULL, 13);
1173 irq = macio_irq(mdev, 0);
1175 base = ioremap(macio_resource_start(mdev, 0), 0x400);
1176 regbase = (unsigned long) base;
1179 pmif->node = mdev->ofdev.dev.of_node;
1180 pmif->regbase = regbase;
1182 pmif->kauai_fcr = NULL;
1184 if (macio_resource_count(mdev) >= 2) {
1185 if (macio_request_resource(mdev, 1, "ide-pmac (dma)"))
1186 printk(KERN_WARNING "ide-pmac: can't request DMA "
1187 "resource for %pOF!\n",
1188 mdev->ofdev.dev.of_node);
1190 pmif->dma_regs = ioremap(macio_resource_start(mdev, 1), 0x1000);
1192 pmif->dma_regs = NULL;
1194 dev_set_drvdata(&mdev->ofdev.dev, pmif);
1196 memset(&hw, 0, sizeof(hw));
1197 pmac_ide_init_ports(&hw, pmif->regbase);
1199 hw.dev = &mdev->bus->pdev->dev;
1200 hw.parent = &mdev->ofdev.dev;
1202 rc = pmac_ide_setup_device(pmif, &hw);
1204 /* The inteface is released to the common IDE layer */
1205 dev_set_drvdata(&mdev->ofdev.dev, NULL);
1207 if (pmif->dma_regs) {
1208 iounmap(pmif->dma_regs);
1209 macio_release_resource(mdev, 1);
1211 macio_release_resource(mdev, 0);
1223 pmac_ide_macio_suspend(struct macio_dev *mdev, pm_message_t mesg)
1225 pmac_ide_hwif_t *pmif = dev_get_drvdata(&mdev->ofdev.dev);
1228 if (mesg.event != mdev->ofdev.dev.power.power_state.event
1229 && (mesg.event & PM_EVENT_SLEEP)) {
1230 rc = pmac_ide_do_suspend(pmif);
1232 mdev->ofdev.dev.power.power_state = mesg;
1239 pmac_ide_macio_resume(struct macio_dev *mdev)
1241 pmac_ide_hwif_t *pmif = dev_get_drvdata(&mdev->ofdev.dev);
1244 if (mdev->ofdev.dev.power.power_state.event != PM_EVENT_ON) {
1245 rc = pmac_ide_do_resume(pmif);
1247 mdev->ofdev.dev.power.power_state = PMSG_ON;
1254 * Attach to a PCI probed interface
1256 static int pmac_ide_pci_attach(struct pci_dev *pdev,
1257 const struct pci_device_id *id)
1259 struct device_node *np;
1260 pmac_ide_hwif_t *pmif;
1262 unsigned long rbase, rlen;
1266 np = pci_device_to_OF_node(pdev);
1268 printk(KERN_ERR "ide-pmac: cannot find MacIO node for Kauai ATA interface\n");
1272 pmif = kzalloc(sizeof(*pmif), GFP_KERNEL);
1276 if (pci_enable_device(pdev)) {
1277 printk(KERN_WARNING "ide-pmac: Can't enable PCI device for "
1282 pci_set_master(pdev);
1284 if (pci_request_regions(pdev, "Kauai ATA")) {
1285 printk(KERN_ERR "ide-pmac: Cannot obtain PCI resources for "
1294 rbase = pci_resource_start(pdev, 0);
1295 rlen = pci_resource_len(pdev, 0);
1297 base = ioremap(rbase, rlen);
1298 pmif->regbase = (unsigned long) base + 0x2000;
1299 pmif->dma_regs = base + 0x1000;
1300 pmif->kauai_fcr = base;
1301 pmif->irq = pdev->irq;
1303 pci_set_drvdata(pdev, pmif);
1305 memset(&hw, 0, sizeof(hw));
1306 pmac_ide_init_ports(&hw, pmif->regbase);
1308 hw.dev = &pdev->dev;
1310 rc = pmac_ide_setup_device(pmif, &hw);
1312 /* The inteface is released to the common IDE layer */
1314 pci_release_regions(pdev);
1326 pmac_ide_pci_suspend(struct pci_dev *pdev, pm_message_t mesg)
1328 pmac_ide_hwif_t *pmif = pci_get_drvdata(pdev);
1331 if (mesg.event != pdev->dev.power.power_state.event
1332 && (mesg.event & PM_EVENT_SLEEP)) {
1333 rc = pmac_ide_do_suspend(pmif);
1335 pdev->dev.power.power_state = mesg;
1342 pmac_ide_pci_resume(struct pci_dev *pdev)
1344 pmac_ide_hwif_t *pmif = pci_get_drvdata(pdev);
1347 if (pdev->dev.power.power_state.event != PM_EVENT_ON) {
1348 rc = pmac_ide_do_resume(pmif);
1350 pdev->dev.power.power_state = PMSG_ON;
1356 #ifdef CONFIG_PMAC_MEDIABAY
1357 static void pmac_ide_macio_mb_event(struct macio_dev* mdev, int mb_state)
1359 pmac_ide_hwif_t *pmif = dev_get_drvdata(&mdev->ofdev.dev);
1363 if (!pmif->hwif->present)
1364 ide_port_scan(pmif->hwif);
1367 if (pmif->hwif->present)
1368 ide_port_unregister_devices(pmif->hwif);
1371 #endif /* CONFIG_PMAC_MEDIABAY */
1374 static struct of_device_id pmac_ide_macio_match[] =
1391 static struct macio_driver pmac_ide_macio_driver =
1395 .owner = THIS_MODULE,
1396 .of_match_table = pmac_ide_macio_match,
1398 .probe = pmac_ide_macio_attach,
1399 .suspend = pmac_ide_macio_suspend,
1400 .resume = pmac_ide_macio_resume,
1401 #ifdef CONFIG_PMAC_MEDIABAY
1402 .mediabay_event = pmac_ide_macio_mb_event,
1406 static const struct pci_device_id pmac_ide_pci_match[] = {
1407 { PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_UNI_N_ATA), 0 },
1408 { PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_IPID_ATA100), 0 },
1409 { PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_K2_ATA100), 0 },
1410 { PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_SH_ATA), 0 },
1411 { PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_IPID2_ATA), 0 },
1415 static struct pci_driver pmac_ide_pci_driver = {
1417 .id_table = pmac_ide_pci_match,
1418 .probe = pmac_ide_pci_attach,
1419 .suspend = pmac_ide_pci_suspend,
1420 .resume = pmac_ide_pci_resume,
1422 MODULE_DEVICE_TABLE(pci, pmac_ide_pci_match);
1424 int __init pmac_ide_probe(void)
1428 if (!machine_is(powermac))
1431 #ifdef CONFIG_BLK_DEV_IDE_PMAC_ATA100FIRST
1432 error = pci_register_driver(&pmac_ide_pci_driver);
1435 error = macio_register_driver(&pmac_ide_macio_driver);
1437 pci_unregister_driver(&pmac_ide_pci_driver);
1441 error = macio_register_driver(&pmac_ide_macio_driver);
1444 error = pci_register_driver(&pmac_ide_pci_driver);
1446 macio_unregister_driver(&pmac_ide_macio_driver);
1455 * pmac_ide_build_dmatable builds the DBDMA command list
1456 * for a transfer and sets the DBDMA channel to point to it.
1458 static int pmac_ide_build_dmatable(ide_drive_t *drive, struct ide_cmd *cmd)
1460 ide_hwif_t *hwif = drive->hwif;
1461 pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
1462 struct dbdma_cmd *table;
1463 volatile struct dbdma_regs __iomem *dma = pmif->dma_regs;
1464 struct scatterlist *sg;
1465 int wr = !!(cmd->tf_flags & IDE_TFLAG_WRITE);
1466 int i = cmd->sg_nents, count = 0;
1468 /* DMA table is already aligned */
1469 table = (struct dbdma_cmd *) pmif->dma_table_cpu;
1471 /* Make sure DMA controller is stopped (necessary ?) */
1472 writel((RUN|PAUSE|FLUSH|WAKE|DEAD) << 16, &dma->control);
1473 while (readl(&dma->status) & RUN)
1476 /* Build DBDMA commands list */
1477 sg = hwif->sg_table;
1478 while (i && sg_dma_len(sg)) {
1482 cur_addr = sg_dma_address(sg);
1483 cur_len = sg_dma_len(sg);
1485 if (pmif->broken_dma && cur_addr & (L1_CACHE_BYTES - 1)) {
1486 if (pmif->broken_dma_warn == 0) {
1487 printk(KERN_WARNING "%s: DMA on non aligned address, "
1488 "switching to PIO on Ohare chipset\n", drive->name);
1489 pmif->broken_dma_warn = 1;
1494 unsigned int tc = (cur_len < 0xfe00)? cur_len: 0xfe00;
1496 if (count++ >= MAX_DCMDS) {
1497 printk(KERN_WARNING "%s: DMA table too small\n",
1501 table->command = cpu_to_le16(wr? OUTPUT_MORE: INPUT_MORE);
1502 table->req_count = cpu_to_le16(tc);
1503 table->phy_addr = cpu_to_le32(cur_addr);
1505 table->xfer_status = 0;
1506 table->res_count = 0;
1515 /* convert the last command to an input/output last command */
1517 table[-1].command = cpu_to_le16(wr? OUTPUT_LAST: INPUT_LAST);
1518 /* add the stop command to the end of the list */
1519 memset(table, 0, sizeof(struct dbdma_cmd));
1520 table->command = cpu_to_le16(DBDMA_STOP);
1522 writel(hwif->dmatable_dma, &dma->cmdptr);
1526 printk(KERN_DEBUG "%s: empty DMA table?\n", drive->name);
1528 return 0; /* revert to PIO for this request */
1532 * Prepare a DMA transfer. We build the DMA table, adjust the timings for
1533 * a read on KeyLargo ATA/66 and mark us as waiting for DMA completion
1535 static int pmac_ide_dma_setup(ide_drive_t *drive, struct ide_cmd *cmd)
1537 ide_hwif_t *hwif = drive->hwif;
1538 pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
1539 u8 unit = drive->dn & 1, ata4 = (pmif->kind == controller_kl_ata4);
1540 u8 write = !!(cmd->tf_flags & IDE_TFLAG_WRITE);
1542 if (pmac_ide_build_dmatable(drive, cmd) == 0)
1545 /* Apple adds 60ns to wrDataSetup on reads */
1546 if (ata4 && (pmif->timings[unit] & TR_66_UDMA_EN)) {
1547 writel(pmif->timings[unit] + (write ? 0 : 0x00800000UL),
1548 PMAC_IDE_REG(IDE_TIMING_CONFIG));
1549 (void)readl(PMAC_IDE_REG(IDE_TIMING_CONFIG));
1556 * Kick the DMA controller into life after the DMA command has been issued
1560 pmac_ide_dma_start(ide_drive_t *drive)
1562 ide_hwif_t *hwif = drive->hwif;
1563 pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
1564 volatile struct dbdma_regs __iomem *dma;
1566 dma = pmif->dma_regs;
1568 writel((RUN << 16) | RUN, &dma->control);
1569 /* Make sure it gets to the controller right now */
1570 (void)readl(&dma->control);
1574 * After a DMA transfer, make sure the controller is stopped
1577 pmac_ide_dma_end (ide_drive_t *drive)
1579 ide_hwif_t *hwif = drive->hwif;
1580 pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
1581 volatile struct dbdma_regs __iomem *dma = pmif->dma_regs;
1584 dstat = readl(&dma->status);
1585 writel(((RUN|WAKE|DEAD) << 16), &dma->control);
1587 /* verify good dma status. we don't check for ACTIVE beeing 0. We should...
1588 * in theory, but with ATAPI decices doing buffer underruns, that would
1589 * cause us to disable DMA, which isn't what we want
1591 return (dstat & (RUN|DEAD)) != RUN;
1595 * Check out that the interrupt we got was for us. We can't always know this
1596 * for sure with those Apple interfaces (well, we could on the recent ones but
1597 * that's not implemented yet), on the other hand, we don't have shared interrupts
1598 * so it's not really a problem
1601 pmac_ide_dma_test_irq (ide_drive_t *drive)
1603 ide_hwif_t *hwif = drive->hwif;
1604 pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
1605 volatile struct dbdma_regs __iomem *dma = pmif->dma_regs;
1606 unsigned long status, timeout;
1608 /* We have to things to deal with here:
1610 * - The dbdma won't stop if the command was started
1611 * but completed with an error without transferring all
1612 * datas. This happens when bad blocks are met during
1613 * a multi-block transfer.
1615 * - The dbdma fifo hasn't yet finished flushing to
1616 * to system memory when the disk interrupt occurs.
1620 /* If ACTIVE is cleared, the STOP command have passed and
1621 * transfer is complete.
1623 status = readl(&dma->status);
1624 if (!(status & ACTIVE))
1627 /* If dbdma didn't execute the STOP command yet, the
1628 * active bit is still set. We consider that we aren't
1629 * sharing interrupts (which is hopefully the case with
1630 * those controllers) and so we just try to flush the
1631 * channel for pending data in the fifo
1634 writel((FLUSH << 16) | FLUSH, &dma->control);
1638 status = readl(&dma->status);
1639 if ((status & FLUSH) == 0)
1641 if (++timeout > 100) {
1642 printk(KERN_WARNING "ide%d, ide_dma_test_irq timeout flushing channel\n",
1650 static void pmac_ide_dma_host_set(ide_drive_t *drive, int on)
1655 pmac_ide_dma_lost_irq (ide_drive_t *drive)
1657 ide_hwif_t *hwif = drive->hwif;
1658 pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
1659 volatile struct dbdma_regs __iomem *dma = pmif->dma_regs;
1660 unsigned long status = readl(&dma->status);
1662 printk(KERN_ERR "ide-pmac lost interrupt, dma status: %lx\n", status);
1665 static const struct ide_dma_ops pmac_dma_ops = {
1666 .dma_host_set = pmac_ide_dma_host_set,
1667 .dma_setup = pmac_ide_dma_setup,
1668 .dma_start = pmac_ide_dma_start,
1669 .dma_end = pmac_ide_dma_end,
1670 .dma_test_irq = pmac_ide_dma_test_irq,
1671 .dma_lost_irq = pmac_ide_dma_lost_irq,
1675 * Allocate the data structures needed for using DMA with an interface
1676 * and fill the proper list of functions pointers
1678 static int pmac_ide_init_dma(ide_hwif_t *hwif, const struct ide_port_info *d)
1680 pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
1681 struct pci_dev *dev = to_pci_dev(hwif->dev);
1683 /* We won't need pci_dev if we switch to generic consistent
1686 if (dev == NULL || pmif->dma_regs == 0)
1689 * Allocate space for the DBDMA commands.
1690 * The +2 is +1 for the stop command and +1 to allow for
1691 * aligning the start address to a multiple of 16 bytes.
1693 pmif->dma_table_cpu = dma_alloc_coherent(&dev->dev,
1694 (MAX_DCMDS + 2) * sizeof(struct dbdma_cmd),
1695 &hwif->dmatable_dma, GFP_KERNEL);
1696 if (pmif->dma_table_cpu == NULL) {
1697 printk(KERN_ERR "%s: unable to allocate DMA command list\n",
1702 hwif->sg_max_nents = MAX_DCMDS;
1707 module_init(pmac_ide_probe);
1709 MODULE_LICENSE("GPL");