2 * linux/drivers/ide/ppc/pmac.c
4 * Support for IDE interfaces on PowerMacs.
5 * These IDE interfaces are memory-mapped and have a DBDMA channel
8 * Copyright (C) 1998-2003 Paul Mackerras & Ben. Herrenschmidt
9 * Copyright (C) 2007 Bartlomiej Zolnierkiewicz
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version
14 * 2 of the License, or (at your option) any later version.
16 * Some code taken from drivers/ide/ide-dma.c:
18 * Copyright (c) 1995-1998 Mark Lord
20 * TODO: - Use pre-calculated (kauai) timing tables all the time and
21 * get rid of the "rounded" tables used previously, so we have the
22 * same table format for all controllers and can then just have one
26 #include <linux/types.h>
27 #include <linux/kernel.h>
28 #include <linux/init.h>
29 #include <linux/delay.h>
30 #include <linux/ide.h>
31 #include <linux/notifier.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>
40 #include <asm/dbdma.h>
42 #include <asm/pci-bridge.h>
43 #include <asm/machdep.h>
44 #include <asm/pmac_feature.h>
45 #include <asm/sections.h>
49 #include <asm/mediabay.h>
52 #include "../ide-timing.h"
56 #define DMA_WAIT_TIMEOUT 50
58 typedef struct pmac_ide_hwif {
59 unsigned long regbase;
63 unsigned cable_80 : 1;
64 unsigned mediabay : 1;
65 unsigned broken_dma : 1;
66 unsigned broken_dma_warn : 1;
67 struct device_node* node;
68 struct macio_dev *mdev;
70 volatile u32 __iomem * *kauai_fcr;
71 #ifdef CONFIG_BLK_DEV_IDEDMA_PMAC
72 /* Those fields are duplicating what is in hwif. We currently
73 * can't use the hwif ones because of some assumptions that are
74 * beeing done by the generic code about the kind of dma controller
75 * and format of the dma table. This will have to be fixed though.
77 volatile struct dbdma_regs __iomem * dma_regs;
78 struct dbdma_cmd* dma_table_cpu;
83 static pmac_ide_hwif_t pmac_ide[MAX_HWIFS];
84 static int pmac_ide_count;
87 controller_ohare, /* OHare based */
88 controller_heathrow, /* Heathrow/Paddington */
89 controller_kl_ata3, /* KeyLargo ATA-3 */
90 controller_kl_ata4, /* KeyLargo ATA-4 */
91 controller_un_ata6, /* UniNorth2 ATA-6 */
92 controller_k2_ata6, /* K2 ATA-6 */
93 controller_sh_ata6, /* Shasta ATA-6 */
96 static const char* model_name[] = {
97 "OHare ATA", /* OHare based */
98 "Heathrow ATA", /* Heathrow/Paddington */
99 "KeyLargo ATA-3", /* KeyLargo ATA-3 (MDMA only) */
100 "KeyLargo ATA-4", /* KeyLargo ATA-4 (UDMA/66) */
101 "UniNorth ATA-6", /* UniNorth2 ATA-6 (UDMA/100) */
102 "K2 ATA-6", /* K2 ATA-6 (UDMA/100) */
103 "Shasta ATA-6", /* Shasta ATA-6 (UDMA/133) */
107 * Extra registers, both 32-bit little-endian
109 #define IDE_TIMING_CONFIG 0x200
110 #define IDE_INTERRUPT 0x300
112 /* Kauai (U2) ATA has different register setup */
113 #define IDE_KAUAI_PIO_CONFIG 0x200
114 #define IDE_KAUAI_ULTRA_CONFIG 0x210
115 #define IDE_KAUAI_POLL_CONFIG 0x220
118 * Timing configuration register definitions
121 /* Number of IDE_SYSCLK_NS ticks, argument is in nanoseconds */
122 #define SYSCLK_TICKS(t) (((t) + IDE_SYSCLK_NS - 1) / IDE_SYSCLK_NS)
123 #define SYSCLK_TICKS_66(t) (((t) + IDE_SYSCLK_66_NS - 1) / IDE_SYSCLK_66_NS)
124 #define IDE_SYSCLK_NS 30 /* 33Mhz cell */
125 #define IDE_SYSCLK_66_NS 15 /* 66Mhz cell */
127 /* 133Mhz cell, found in shasta.
128 * See comments about 100 Mhz Uninorth 2...
129 * Note that PIO_MASK and MDMA_MASK seem to overlap
131 #define TR_133_PIOREG_PIO_MASK 0xff000fff
132 #define TR_133_PIOREG_MDMA_MASK 0x00fff800
133 #define TR_133_UDMAREG_UDMA_MASK 0x0003ffff
134 #define TR_133_UDMAREG_UDMA_EN 0x00000001
136 /* 100Mhz cell, found in Uninorth 2. I don't have much infos about
137 * this one yet, it appears as a pci device (106b/0033) on uninorth
138 * internal PCI bus and it's clock is controlled like gem or fw. It
139 * appears to be an evolution of keylargo ATA4 with a timing register
140 * extended to 2 32bits registers and a similar DBDMA channel. Other
141 * registers seem to exist but I can't tell much about them.
143 * So far, I'm using pre-calculated tables for this extracted from
144 * the values used by the MacOS X driver.
146 * The "PIO" register controls PIO and MDMA timings, the "ULTRA"
147 * register controls the UDMA timings. At least, it seems bit 0
148 * of this one enables UDMA vs. MDMA, and bits 4..7 are the
149 * cycle time in units of 10ns. Bits 8..15 are used by I don't
150 * know their meaning yet
152 #define TR_100_PIOREG_PIO_MASK 0xff000fff
153 #define TR_100_PIOREG_MDMA_MASK 0x00fff000
154 #define TR_100_UDMAREG_UDMA_MASK 0x0000ffff
155 #define TR_100_UDMAREG_UDMA_EN 0x00000001
158 /* 66Mhz cell, found in KeyLargo. Can do ultra mode 0 to 2 on
159 * 40 connector cable and to 4 on 80 connector one.
160 * Clock unit is 15ns (66Mhz)
162 * 3 Values can be programmed:
163 * - Write data setup, which appears to match the cycle time. They
164 * also call it DIOW setup.
165 * - Ready to pause time (from spec)
166 * - Address setup. That one is weird. I don't see where exactly
167 * it fits in UDMA cycles, I got it's name from an obscure piece
168 * of commented out code in Darwin. They leave it to 0, we do as
169 * well, despite a comment that would lead to think it has a
171 * Apple also add 60ns to the write data setup (or cycle time ?) on
174 #define TR_66_UDMA_MASK 0xfff00000
175 #define TR_66_UDMA_EN 0x00100000 /* Enable Ultra mode for DMA */
176 #define TR_66_UDMA_ADDRSETUP_MASK 0xe0000000 /* Address setup */
177 #define TR_66_UDMA_ADDRSETUP_SHIFT 29
178 #define TR_66_UDMA_RDY2PAUS_MASK 0x1e000000 /* Ready 2 pause time */
179 #define TR_66_UDMA_RDY2PAUS_SHIFT 25
180 #define TR_66_UDMA_WRDATASETUP_MASK 0x01e00000 /* Write data setup time */
181 #define TR_66_UDMA_WRDATASETUP_SHIFT 21
182 #define TR_66_MDMA_MASK 0x000ffc00
183 #define TR_66_MDMA_RECOVERY_MASK 0x000f8000
184 #define TR_66_MDMA_RECOVERY_SHIFT 15
185 #define TR_66_MDMA_ACCESS_MASK 0x00007c00
186 #define TR_66_MDMA_ACCESS_SHIFT 10
187 #define TR_66_PIO_MASK 0x000003ff
188 #define TR_66_PIO_RECOVERY_MASK 0x000003e0
189 #define TR_66_PIO_RECOVERY_SHIFT 5
190 #define TR_66_PIO_ACCESS_MASK 0x0000001f
191 #define TR_66_PIO_ACCESS_SHIFT 0
193 /* 33Mhz cell, found in OHare, Heathrow (& Paddington) and KeyLargo
194 * Can do pio & mdma modes, clock unit is 30ns (33Mhz)
196 * The access time and recovery time can be programmed. Some older
197 * Darwin code base limit OHare to 150ns cycle time. I decided to do
198 * the same here fore safety against broken old hardware ;)
199 * The HalfTick bit, when set, adds half a clock (15ns) to the access
200 * time and removes one from recovery. It's not supported on KeyLargo
201 * implementation afaik. The E bit appears to be set for PIO mode 0 and
202 * is used to reach long timings used in this mode.
204 #define TR_33_MDMA_MASK 0x003ff800
205 #define TR_33_MDMA_RECOVERY_MASK 0x001f0000
206 #define TR_33_MDMA_RECOVERY_SHIFT 16
207 #define TR_33_MDMA_ACCESS_MASK 0x0000f800
208 #define TR_33_MDMA_ACCESS_SHIFT 11
209 #define TR_33_MDMA_HALFTICK 0x00200000
210 #define TR_33_PIO_MASK 0x000007ff
211 #define TR_33_PIO_E 0x00000400
212 #define TR_33_PIO_RECOVERY_MASK 0x000003e0
213 #define TR_33_PIO_RECOVERY_SHIFT 5
214 #define TR_33_PIO_ACCESS_MASK 0x0000001f
215 #define TR_33_PIO_ACCESS_SHIFT 0
218 * Interrupt register definitions
220 #define IDE_INTR_DMA 0x80000000
221 #define IDE_INTR_DEVICE 0x40000000
224 * FCR Register on Kauai. Not sure what bit 0x4 is ...
226 #define KAUAI_FCR_UATA_MAGIC 0x00000004
227 #define KAUAI_FCR_UATA_RESET_N 0x00000002
228 #define KAUAI_FCR_UATA_ENABLE 0x00000001
230 #ifdef CONFIG_BLK_DEV_IDEDMA_PMAC
232 /* Rounded Multiword DMA timings
234 * I gave up finding a generic formula for all controller
235 * types and instead, built tables based on timing values
236 * used by Apple in Darwin's implementation.
238 struct mdma_timings_t {
244 struct mdma_timings_t mdma_timings_33[] =
257 struct mdma_timings_t mdma_timings_33k[] =
270 struct mdma_timings_t mdma_timings_66[] =
283 /* KeyLargo ATA-4 Ultra DMA timings (rounded) */
285 int addrSetup; /* ??? */
288 } kl66_udma_timings[] =
290 { 0, 180, 120 }, /* Mode 0 */
291 { 0, 150, 90 }, /* 1 */
292 { 0, 120, 60 }, /* 2 */
293 { 0, 90, 45 }, /* 3 */
294 { 0, 90, 30 } /* 4 */
297 /* UniNorth 2 ATA/100 timings */
298 struct kauai_timing {
303 static struct kauai_timing kauai_pio_timings[] =
305 { 930 , 0x08000fff },
306 { 600 , 0x08000a92 },
307 { 383 , 0x0800060f },
308 { 360 , 0x08000492 },
309 { 330 , 0x0800048f },
310 { 300 , 0x080003cf },
311 { 270 , 0x080003cc },
312 { 240 , 0x0800038b },
313 { 239 , 0x0800030c },
314 { 180 , 0x05000249 },
315 { 120 , 0x04000148 },
319 static struct kauai_timing kauai_mdma_timings[] =
321 { 1260 , 0x00fff000 },
322 { 480 , 0x00618000 },
323 { 360 , 0x00492000 },
324 { 270 , 0x0038e000 },
325 { 240 , 0x0030c000 },
326 { 210 , 0x002cb000 },
327 { 180 , 0x00249000 },
328 { 150 , 0x00209000 },
329 { 120 , 0x00148000 },
333 static struct kauai_timing kauai_udma_timings[] =
335 { 120 , 0x000070c0 },
344 static struct kauai_timing shasta_pio_timings[] =
346 { 930 , 0x08000fff },
347 { 600 , 0x0A000c97 },
348 { 383 , 0x07000712 },
349 { 360 , 0x040003cd },
350 { 330 , 0x040003cd },
351 { 300 , 0x040003cd },
352 { 270 , 0x040003cd },
353 { 240 , 0x040003cd },
354 { 239 , 0x040003cd },
355 { 180 , 0x0400028b },
356 { 120 , 0x0400010a },
360 static struct kauai_timing shasta_mdma_timings[] =
362 { 1260 , 0x00fff000 },
363 { 480 , 0x00820800 },
364 { 360 , 0x00820800 },
365 { 270 , 0x00820800 },
366 { 240 , 0x00820800 },
367 { 210 , 0x00820800 },
368 { 180 , 0x00820800 },
369 { 150 , 0x0028b000 },
370 { 120 , 0x001ca000 },
374 static struct kauai_timing shasta_udma133_timings[] =
376 { 120 , 0x00035901, },
377 { 90 , 0x000348b1, },
378 { 60 , 0x00033881, },
379 { 45 , 0x00033861, },
380 { 30 , 0x00033841, },
381 { 20 , 0x00033031, },
382 { 15 , 0x00033021, },
388 kauai_lookup_timing(struct kauai_timing* table, int cycle_time)
392 for (i=0; table[i].cycle_time; i++)
393 if (cycle_time > table[i+1].cycle_time)
394 return table[i].timing_reg;
399 /* allow up to 256 DBDMA commands per xfer */
400 #define MAX_DCMDS 256
403 * Wait 1s for disk to answer on IDE bus after a hard reset
404 * of the device (via GPIO/FCR).
406 * Some devices seem to "pollute" the bus even after dropping
407 * the BSY bit (typically some combo drives slave on the UDMA
408 * bus) after a hard reset. Since we hard reset all drives on
409 * KeyLargo ATA66, we have to keep that delay around. I may end
410 * up not hard resetting anymore on these and keep the delay only
411 * for older interfaces instead (we have to reset when coming
412 * from MacOS...) --BenH.
414 #define IDE_WAKEUP_DELAY (1*HZ)
416 static void pmac_ide_setup_dma(pmac_ide_hwif_t *pmif, ide_hwif_t *hwif);
417 static int pmac_ide_build_dmatable(ide_drive_t *drive, struct request *rq);
418 static void pmac_ide_selectproc(ide_drive_t *drive);
419 static void pmac_ide_kauai_selectproc(ide_drive_t *drive);
421 #endif /* CONFIG_BLK_DEV_IDEDMA_PMAC */
424 * N.B. this can't be an initfunc, because the media-bay task can
425 * call ide_[un]register at any time.
428 pmac_ide_init_hwif_ports(hw_regs_t *hw,
429 unsigned long data_port, unsigned long ctrl_port,
437 for (ix = 0; ix < MAX_HWIFS; ++ix)
438 if (data_port == pmac_ide[ix].regbase)
442 return; /* not an IDE PMAC interface */
444 for (i = 0; i < 8; ++i)
445 hw->io_ports[i] = data_port + i * 0x10;
446 hw->io_ports[8] = data_port + 0x160;
449 *irq = pmac_ide[ix].irq;
451 hw->dev = &pmac_ide[ix].mdev->ofdev.dev;
454 #define PMAC_IDE_REG(x) ((void __iomem *)(IDE_DATA_REG+(x)))
457 * Apply the timings of the proper unit (master/slave) to the shared
458 * timing register when selecting that unit. This version is for
459 * ASICs with a single timing register
462 pmac_ide_selectproc(ide_drive_t *drive)
464 pmac_ide_hwif_t* pmif = (pmac_ide_hwif_t *)HWIF(drive)->hwif_data;
469 if (drive->select.b.unit & 0x01)
470 writel(pmif->timings[1], PMAC_IDE_REG(IDE_TIMING_CONFIG));
472 writel(pmif->timings[0], PMAC_IDE_REG(IDE_TIMING_CONFIG));
473 (void)readl(PMAC_IDE_REG(IDE_TIMING_CONFIG));
477 * Apply the timings of the proper unit (master/slave) to the shared
478 * timing register when selecting that unit. This version is for
479 * ASICs with a dual timing register (Kauai)
482 pmac_ide_kauai_selectproc(ide_drive_t *drive)
484 pmac_ide_hwif_t* pmif = (pmac_ide_hwif_t *)HWIF(drive)->hwif_data;
489 if (drive->select.b.unit & 0x01) {
490 writel(pmif->timings[1], PMAC_IDE_REG(IDE_KAUAI_PIO_CONFIG));
491 writel(pmif->timings[3], PMAC_IDE_REG(IDE_KAUAI_ULTRA_CONFIG));
493 writel(pmif->timings[0], PMAC_IDE_REG(IDE_KAUAI_PIO_CONFIG));
494 writel(pmif->timings[2], PMAC_IDE_REG(IDE_KAUAI_ULTRA_CONFIG));
496 (void)readl(PMAC_IDE_REG(IDE_KAUAI_PIO_CONFIG));
500 * Force an update of controller timing values for a given drive
503 pmac_ide_do_update_timings(ide_drive_t *drive)
505 pmac_ide_hwif_t* pmif = (pmac_ide_hwif_t *)HWIF(drive)->hwif_data;
510 if (pmif->kind == controller_sh_ata6 ||
511 pmif->kind == controller_un_ata6 ||
512 pmif->kind == controller_k2_ata6)
513 pmac_ide_kauai_selectproc(drive);
515 pmac_ide_selectproc(drive);
519 pmac_outbsync(ide_drive_t *drive, u8 value, unsigned long port)
523 writeb(value, (void __iomem *) port);
524 tmp = readl(PMAC_IDE_REG(IDE_TIMING_CONFIG));
528 * Old tuning functions (called on hdparm -p), sets up drive PIO timings
531 pmac_ide_set_pio_mode(ide_drive_t *drive, const u8 pio)
534 unsigned accessTicks, recTicks;
535 unsigned accessTime, recTime;
536 pmac_ide_hwif_t* pmif = (pmac_ide_hwif_t *)HWIF(drive)->hwif_data;
537 unsigned int cycle_time;
542 /* which drive is it ? */
543 timings = &pmif->timings[drive->select.b.unit & 0x01];
546 cycle_time = ide_pio_cycle_time(drive, pio);
548 switch (pmif->kind) {
549 case controller_sh_ata6: {
551 u32 tr = kauai_lookup_timing(shasta_pio_timings, cycle_time);
552 t = (t & ~TR_133_PIOREG_PIO_MASK) | tr;
555 case controller_un_ata6:
556 case controller_k2_ata6: {
558 u32 tr = kauai_lookup_timing(kauai_pio_timings, cycle_time);
559 t = (t & ~TR_100_PIOREG_PIO_MASK) | tr;
562 case controller_kl_ata4:
564 recTime = cycle_time - ide_pio_timings[pio].active_time
565 - ide_pio_timings[pio].setup_time;
566 recTime = max(recTime, 150U);
567 accessTime = ide_pio_timings[pio].active_time;
568 accessTime = max(accessTime, 150U);
569 accessTicks = SYSCLK_TICKS_66(accessTime);
570 accessTicks = min(accessTicks, 0x1fU);
571 recTicks = SYSCLK_TICKS_66(recTime);
572 recTicks = min(recTicks, 0x1fU);
573 t = (t & ~TR_66_PIO_MASK) |
574 (accessTicks << TR_66_PIO_ACCESS_SHIFT) |
575 (recTicks << TR_66_PIO_RECOVERY_SHIFT);
580 recTime = cycle_time - ide_pio_timings[pio].active_time
581 - ide_pio_timings[pio].setup_time;
582 recTime = max(recTime, 150U);
583 accessTime = ide_pio_timings[pio].active_time;
584 accessTime = max(accessTime, 150U);
585 accessTicks = SYSCLK_TICKS(accessTime);
586 accessTicks = min(accessTicks, 0x1fU);
587 accessTicks = max(accessTicks, 4U);
588 recTicks = SYSCLK_TICKS(recTime);
589 recTicks = min(recTicks, 0x1fU);
590 recTicks = max(recTicks, 5U) - 4;
592 recTicks--; /* guess, but it's only for PIO0, so... */
595 t = (t & ~TR_33_PIO_MASK) |
596 (accessTicks << TR_33_PIO_ACCESS_SHIFT) |
597 (recTicks << TR_33_PIO_RECOVERY_SHIFT);
604 #ifdef IDE_PMAC_DEBUG
605 printk(KERN_ERR "%s: Set PIO timing for mode %d, reg: 0x%08x\n",
606 drive->name, pio, *timings);
610 pmac_ide_do_update_timings(drive);
613 #ifdef CONFIG_BLK_DEV_IDEDMA_PMAC
616 * Calculate KeyLargo ATA/66 UDMA timings
619 set_timings_udma_ata4(u32 *timings, u8 speed)
621 unsigned rdyToPauseTicks, wrDataSetupTicks, addrTicks;
623 if (speed > XFER_UDMA_4)
626 rdyToPauseTicks = SYSCLK_TICKS_66(kl66_udma_timings[speed & 0xf].rdy2pause);
627 wrDataSetupTicks = SYSCLK_TICKS_66(kl66_udma_timings[speed & 0xf].wrDataSetup);
628 addrTicks = SYSCLK_TICKS_66(kl66_udma_timings[speed & 0xf].addrSetup);
630 *timings = ((*timings) & ~(TR_66_UDMA_MASK | TR_66_MDMA_MASK)) |
631 (wrDataSetupTicks << TR_66_UDMA_WRDATASETUP_SHIFT) |
632 (rdyToPauseTicks << TR_66_UDMA_RDY2PAUS_SHIFT) |
633 (addrTicks <<TR_66_UDMA_ADDRSETUP_SHIFT) |
635 #ifdef IDE_PMAC_DEBUG
636 printk(KERN_ERR "ide_pmac: Set UDMA timing for mode %d, reg: 0x%08x\n",
637 speed & 0xf, *timings);
644 * Calculate Kauai ATA/100 UDMA timings
647 set_timings_udma_ata6(u32 *pio_timings, u32 *ultra_timings, u8 speed)
649 struct ide_timing *t = ide_timing_find_mode(speed);
652 if (speed > XFER_UDMA_5 || t == NULL)
654 tr = kauai_lookup_timing(kauai_udma_timings, (int)t->udma);
655 *ultra_timings = ((*ultra_timings) & ~TR_100_UDMAREG_UDMA_MASK) | tr;
656 *ultra_timings = (*ultra_timings) | TR_100_UDMAREG_UDMA_EN;
662 * Calculate Shasta ATA/133 UDMA timings
665 set_timings_udma_shasta(u32 *pio_timings, u32 *ultra_timings, u8 speed)
667 struct ide_timing *t = ide_timing_find_mode(speed);
670 if (speed > XFER_UDMA_6 || t == NULL)
672 tr = kauai_lookup_timing(shasta_udma133_timings, (int)t->udma);
673 *ultra_timings = ((*ultra_timings) & ~TR_133_UDMAREG_UDMA_MASK) | tr;
674 *ultra_timings = (*ultra_timings) | TR_133_UDMAREG_UDMA_EN;
680 * Calculate MDMA timings for all cells
683 set_timings_mdma(ide_drive_t *drive, int intf_type, u32 *timings, u32 *timings2,
686 int cycleTime, accessTime = 0, recTime = 0;
687 unsigned accessTicks, recTicks;
688 struct hd_driveid *id = drive->id;
689 struct mdma_timings_t* tm = NULL;
692 /* Get default cycle time for mode */
693 switch(speed & 0xf) {
694 case 0: cycleTime = 480; break;
695 case 1: cycleTime = 150; break;
696 case 2: cycleTime = 120; break;
702 /* Check if drive provides explicit DMA cycle time */
703 if ((id->field_valid & 2) && id->eide_dma_time)
704 cycleTime = max_t(int, id->eide_dma_time, cycleTime);
706 /* OHare limits according to some old Apple sources */
707 if ((intf_type == controller_ohare) && (cycleTime < 150))
709 /* Get the proper timing array for this controller */
711 case controller_sh_ata6:
712 case controller_un_ata6:
713 case controller_k2_ata6:
715 case controller_kl_ata4:
716 tm = mdma_timings_66;
718 case controller_kl_ata3:
719 tm = mdma_timings_33k;
722 tm = mdma_timings_33;
726 /* Lookup matching access & recovery times */
729 if (tm[i+1].cycleTime < cycleTime)
733 cycleTime = tm[i].cycleTime;
734 accessTime = tm[i].accessTime;
735 recTime = tm[i].recoveryTime;
737 #ifdef IDE_PMAC_DEBUG
738 printk(KERN_ERR "%s: MDMA, cycleTime: %d, accessTime: %d, recTime: %d\n",
739 drive->name, cycleTime, accessTime, recTime);
743 case controller_sh_ata6: {
745 u32 tr = kauai_lookup_timing(shasta_mdma_timings, cycleTime);
746 *timings = ((*timings) & ~TR_133_PIOREG_MDMA_MASK) | tr;
747 *timings2 = (*timings2) & ~TR_133_UDMAREG_UDMA_EN;
749 case controller_un_ata6:
750 case controller_k2_ata6: {
752 u32 tr = kauai_lookup_timing(kauai_mdma_timings, cycleTime);
753 *timings = ((*timings) & ~TR_100_PIOREG_MDMA_MASK) | tr;
754 *timings2 = (*timings2) & ~TR_100_UDMAREG_UDMA_EN;
757 case controller_kl_ata4:
759 accessTicks = SYSCLK_TICKS_66(accessTime);
760 accessTicks = min(accessTicks, 0x1fU);
761 accessTicks = max(accessTicks, 0x1U);
762 recTicks = SYSCLK_TICKS_66(recTime);
763 recTicks = min(recTicks, 0x1fU);
764 recTicks = max(recTicks, 0x3U);
765 /* Clear out mdma bits and disable udma */
766 *timings = ((*timings) & ~(TR_66_MDMA_MASK | TR_66_UDMA_MASK)) |
767 (accessTicks << TR_66_MDMA_ACCESS_SHIFT) |
768 (recTicks << TR_66_MDMA_RECOVERY_SHIFT);
770 case controller_kl_ata3:
771 /* 33Mhz cell on KeyLargo */
772 accessTicks = SYSCLK_TICKS(accessTime);
773 accessTicks = max(accessTicks, 1U);
774 accessTicks = min(accessTicks, 0x1fU);
775 accessTime = accessTicks * IDE_SYSCLK_NS;
776 recTicks = SYSCLK_TICKS(recTime);
777 recTicks = max(recTicks, 1U);
778 recTicks = min(recTicks, 0x1fU);
779 *timings = ((*timings) & ~TR_33_MDMA_MASK) |
780 (accessTicks << TR_33_MDMA_ACCESS_SHIFT) |
781 (recTicks << TR_33_MDMA_RECOVERY_SHIFT);
784 /* 33Mhz cell on others */
786 int origAccessTime = accessTime;
787 int origRecTime = recTime;
789 accessTicks = SYSCLK_TICKS(accessTime);
790 accessTicks = max(accessTicks, 1U);
791 accessTicks = min(accessTicks, 0x1fU);
792 accessTime = accessTicks * IDE_SYSCLK_NS;
793 recTicks = SYSCLK_TICKS(recTime);
794 recTicks = max(recTicks, 2U) - 1;
795 recTicks = min(recTicks, 0x1fU);
796 recTime = (recTicks + 1) * IDE_SYSCLK_NS;
797 if ((accessTicks > 1) &&
798 ((accessTime - IDE_SYSCLK_NS/2) >= origAccessTime) &&
799 ((recTime - IDE_SYSCLK_NS/2) >= origRecTime)) {
803 *timings = ((*timings) & ~TR_33_MDMA_MASK) |
804 (accessTicks << TR_33_MDMA_ACCESS_SHIFT) |
805 (recTicks << TR_33_MDMA_RECOVERY_SHIFT);
807 *timings |= TR_33_MDMA_HALFTICK;
810 #ifdef IDE_PMAC_DEBUG
811 printk(KERN_ERR "%s: Set MDMA timing for mode %d, reg: 0x%08x\n",
812 drive->name, speed & 0xf, *timings);
815 #endif /* #ifdef CONFIG_BLK_DEV_IDEDMA_PMAC */
817 static void pmac_ide_set_dma_mode(ide_drive_t *drive, const u8 speed)
819 int unit = (drive->select.b.unit & 0x01);
821 pmac_ide_hwif_t* pmif = (pmac_ide_hwif_t *)HWIF(drive)->hwif_data;
822 u32 *timings, *timings2, tl[2];
824 timings = &pmif->timings[unit];
825 timings2 = &pmif->timings[unit+2];
827 /* Copy timings to local image */
832 #ifdef CONFIG_BLK_DEV_IDEDMA_PMAC
840 if (pmif->kind == controller_kl_ata4)
841 ret = set_timings_udma_ata4(&tl[0], speed);
842 else if (pmif->kind == controller_un_ata6
843 || pmif->kind == controller_k2_ata6)
844 ret = set_timings_udma_ata6(&tl[0], &tl[1], speed);
845 else if (pmif->kind == controller_sh_ata6)
846 ret = set_timings_udma_shasta(&tl[0], &tl[1], speed);
853 set_timings_mdma(drive, pmif->kind, &tl[0], &tl[1], speed);
859 #endif /* CONFIG_BLK_DEV_IDEDMA_PMAC */
866 /* Apply timings to controller */
870 pmac_ide_do_update_timings(drive);
874 * Blast some well known "safe" values to the timing registers at init or
875 * wakeup from sleep time, before we do real calculation
878 sanitize_timings(pmac_ide_hwif_t *pmif)
880 unsigned int value, value2 = 0;
883 case controller_sh_ata6:
887 case controller_un_ata6:
888 case controller_k2_ata6:
892 case controller_kl_ata4:
895 case controller_kl_ata3:
898 case controller_heathrow:
899 case controller_ohare:
904 pmif->timings[0] = pmif->timings[1] = value;
905 pmif->timings[2] = pmif->timings[3] = value2;
909 pmac_ide_get_base(int index)
911 return pmac_ide[index].regbase;
915 pmac_ide_check_base(unsigned long base)
919 for (ix = 0; ix < MAX_HWIFS; ++ix)
920 if (base == pmac_ide[ix].regbase)
926 pmac_ide_get_irq(unsigned long base)
930 for (ix = 0; ix < MAX_HWIFS; ++ix)
931 if (base == pmac_ide[ix].regbase)
932 return pmac_ide[ix].irq;
936 static int ide_majors[] = { 3, 22, 33, 34, 56, 57 };
939 pmac_find_ide_boot(char *bootdevice, int n)
944 * Look through the list of IDE interfaces for this one.
946 for (i = 0; i < pmac_ide_count; ++i) {
948 if (!pmac_ide[i].node || !pmac_ide[i].node->full_name)
950 name = pmac_ide[i].node->full_name;
951 if (memcmp(name, bootdevice, n) == 0 && name[n] == 0) {
952 /* XXX should cope with the 2nd drive as well... */
953 return MKDEV(ide_majors[i], 0);
960 /* Suspend call back, should be called after the child devices
961 * have actually been suspended
964 pmac_ide_do_suspend(ide_hwif_t *hwif)
966 pmac_ide_hwif_t *pmif = (pmac_ide_hwif_t *)hwif->hwif_data;
968 /* We clear the timings */
969 pmif->timings[0] = 0;
970 pmif->timings[1] = 0;
972 disable_irq(pmif->irq);
974 /* The media bay will handle itself just fine */
978 /* Kauai has bus control FCRs directly here */
979 if (pmif->kauai_fcr) {
980 u32 fcr = readl(pmif->kauai_fcr);
981 fcr &= ~(KAUAI_FCR_UATA_RESET_N | KAUAI_FCR_UATA_ENABLE);
982 writel(fcr, pmif->kauai_fcr);
985 /* Disable the bus on older machines and the cell on kauai */
986 ppc_md.feature_call(PMAC_FTR_IDE_ENABLE, pmif->node, pmif->aapl_bus_id,
992 /* Resume call back, should be called before the child devices
996 pmac_ide_do_resume(ide_hwif_t *hwif)
998 pmac_ide_hwif_t *pmif = (pmac_ide_hwif_t *)hwif->hwif_data;
1000 /* Hard reset & re-enable controller (do we really need to reset ? -BenH) */
1001 if (!pmif->mediabay) {
1002 ppc_md.feature_call(PMAC_FTR_IDE_RESET, pmif->node, pmif->aapl_bus_id, 1);
1003 ppc_md.feature_call(PMAC_FTR_IDE_ENABLE, pmif->node, pmif->aapl_bus_id, 1);
1005 ppc_md.feature_call(PMAC_FTR_IDE_RESET, pmif->node, pmif->aapl_bus_id, 0);
1007 /* Kauai has it different */
1008 if (pmif->kauai_fcr) {
1009 u32 fcr = readl(pmif->kauai_fcr);
1010 fcr |= KAUAI_FCR_UATA_RESET_N | KAUAI_FCR_UATA_ENABLE;
1011 writel(fcr, pmif->kauai_fcr);
1014 msleep(jiffies_to_msecs(IDE_WAKEUP_DELAY));
1017 /* Sanitize drive timings */
1018 sanitize_timings(pmif);
1020 enable_irq(pmif->irq);
1026 * Setup, register & probe an IDE channel driven by this driver, this is
1027 * called by one of the 2 probe functions (macio or PCI). Note that a channel
1028 * that ends up beeing free of any device is not kept around by this driver
1029 * (it is kept in 2.4). This introduce an interface numbering change on some
1030 * rare machines unfortunately, but it's better this way.
1033 pmac_ide_setup_device(pmac_ide_hwif_t *pmif, ide_hwif_t *hwif)
1035 struct device_node *np = pmif->node;
1037 u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
1041 pmif->broken_dma = pmif->broken_dma_warn = 0;
1042 if (of_device_is_compatible(np, "shasta-ata"))
1043 pmif->kind = controller_sh_ata6;
1044 else if (of_device_is_compatible(np, "kauai-ata"))
1045 pmif->kind = controller_un_ata6;
1046 else if (of_device_is_compatible(np, "K2-UATA"))
1047 pmif->kind = controller_k2_ata6;
1048 else if (of_device_is_compatible(np, "keylargo-ata")) {
1049 if (strcmp(np->name, "ata-4") == 0)
1050 pmif->kind = controller_kl_ata4;
1052 pmif->kind = controller_kl_ata3;
1053 } else if (of_device_is_compatible(np, "heathrow-ata"))
1054 pmif->kind = controller_heathrow;
1056 pmif->kind = controller_ohare;
1057 pmif->broken_dma = 1;
1060 bidp = of_get_property(np, "AAPL,bus-id", NULL);
1061 pmif->aapl_bus_id = bidp ? *bidp : 0;
1063 /* Get cable type from device-tree */
1064 if (pmif->kind == controller_kl_ata4 || pmif->kind == controller_un_ata6
1065 || pmif->kind == controller_k2_ata6
1066 || pmif->kind == controller_sh_ata6) {
1067 const char* cable = of_get_property(np, "cable-type", NULL);
1068 if (cable && !strncmp(cable, "80-", 3))
1071 /* G5's seem to have incorrect cable type in device-tree. Let's assume
1072 * they have a 80 conductor cable, this seem to be always the case unless
1073 * the user mucked around
1075 if (of_device_is_compatible(np, "K2-UATA") ||
1076 of_device_is_compatible(np, "shasta-ata"))
1079 /* On Kauai-type controllers, we make sure the FCR is correct */
1080 if (pmif->kauai_fcr)
1081 writel(KAUAI_FCR_UATA_MAGIC |
1082 KAUAI_FCR_UATA_RESET_N |
1083 KAUAI_FCR_UATA_ENABLE, pmif->kauai_fcr);
1087 /* Make sure we have sane timings */
1088 sanitize_timings(pmif);
1090 #ifndef CONFIG_PPC64
1091 /* XXX FIXME: Media bay stuff need re-organizing */
1092 if (np->parent && np->parent->name
1093 && strcasecmp(np->parent->name, "media-bay") == 0) {
1094 #ifdef CONFIG_PMAC_MEDIABAY
1095 media_bay_set_ide_infos(np->parent, pmif->regbase, pmif->irq, hwif->index);
1096 #endif /* CONFIG_PMAC_MEDIABAY */
1099 pmif->aapl_bus_id = 1;
1100 } else if (pmif->kind == controller_ohare) {
1101 /* The code below is having trouble on some ohare machines
1102 * (timing related ?). Until I can put my hand on one of these
1103 * units, I keep the old way
1105 ppc_md.feature_call(PMAC_FTR_IDE_ENABLE, np, 0, 1);
1109 /* This is necessary to enable IDE when net-booting */
1110 ppc_md.feature_call(PMAC_FTR_IDE_RESET, np, pmif->aapl_bus_id, 1);
1111 ppc_md.feature_call(PMAC_FTR_IDE_ENABLE, np, pmif->aapl_bus_id, 1);
1113 ppc_md.feature_call(PMAC_FTR_IDE_RESET, np, pmif->aapl_bus_id, 0);
1114 msleep(jiffies_to_msecs(IDE_WAKEUP_DELAY));
1117 /* Setup MMIO ops */
1118 default_hwif_mmiops(hwif);
1119 hwif->OUTBSYNC = pmac_outbsync;
1121 /* Tell common code _not_ to mess with resources */
1123 hwif->hwif_data = pmif;
1124 memset(&hw, 0, sizeof(hw));
1125 pmac_ide_init_hwif_ports(&hw, pmif->regbase, 0, &hwif->irq);
1126 memcpy(hwif->io_ports, hw.io_ports, sizeof(hwif->io_ports));
1127 hwif->chipset = ide_pmac;
1128 hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET] || pmif->mediabay;
1129 hwif->hold = pmif->mediabay;
1130 hwif->cbl = pmif->cable_80 ? ATA_CBL_PATA80 : ATA_CBL_PATA40;
1131 hwif->drives[0].unmask = 1;
1132 hwif->drives[1].unmask = 1;
1133 hwif->drives[0].autotune = IDE_TUNE_AUTO;
1134 hwif->drives[1].autotune = IDE_TUNE_AUTO;
1135 hwif->host_flags = IDE_HFLAG_SET_PIO_MODE_KEEP_DMA |
1136 IDE_HFLAG_PIO_NO_DOWNGRADE |
1137 IDE_HFLAG_POST_SET_MODE;
1138 hwif->pio_mask = ATA_PIO4;
1139 hwif->set_pio_mode = pmac_ide_set_pio_mode;
1140 if (pmif->kind == controller_un_ata6
1141 || pmif->kind == controller_k2_ata6
1142 || pmif->kind == controller_sh_ata6)
1143 hwif->selectproc = pmac_ide_kauai_selectproc;
1145 hwif->selectproc = pmac_ide_selectproc;
1146 hwif->set_dma_mode = pmac_ide_set_dma_mode;
1148 printk(KERN_INFO "ide%d: Found Apple %s controller, bus ID %d%s, irq %d\n",
1149 hwif->index, model_name[pmif->kind], pmif->aapl_bus_id,
1150 pmif->mediabay ? " (mediabay)" : "", hwif->irq);
1152 #ifdef CONFIG_PMAC_MEDIABAY
1153 if (pmif->mediabay && check_media_bay_by_base(pmif->regbase, MB_CD) == 0)
1155 #endif /* CONFIG_PMAC_MEDIABAY */
1157 hwif->sg_max_nents = MAX_DCMDS;
1159 #ifdef CONFIG_BLK_DEV_IDEDMA_PMAC
1160 /* has a DBDMA controller channel */
1162 pmac_ide_setup_dma(pmif, hwif);
1163 #endif /* CONFIG_BLK_DEV_IDEDMA_PMAC */
1165 idx[0] = hwif->index;
1167 ide_device_add(idx);
1173 * Attach to a macio probed interface
1175 static int __devinit
1176 pmac_ide_macio_attach(struct macio_dev *mdev, const struct of_device_id *match)
1179 unsigned long regbase;
1182 pmac_ide_hwif_t *pmif;
1186 while (i < MAX_HWIFS && (ide_hwifs[i].io_ports[IDE_DATA_OFFSET] != 0
1187 || pmac_ide[i].node != NULL))
1189 if (i >= MAX_HWIFS) {
1190 printk(KERN_ERR "ide-pmac: MacIO interface attach with no slot\n");
1191 printk(KERN_ERR " %s\n", mdev->ofdev.node->full_name);
1195 pmif = &pmac_ide[i];
1196 hwif = &ide_hwifs[i];
1198 if (macio_resource_count(mdev) == 0) {
1199 printk(KERN_WARNING "ide%d: no address for %s\n",
1200 i, mdev->ofdev.node->full_name);
1204 /* Request memory resource for IO ports */
1205 if (macio_request_resource(mdev, 0, "ide-pmac (ports)")) {
1206 printk(KERN_ERR "ide%d: can't request mmio resource !\n", i);
1210 /* XXX This is bogus. Should be fixed in the registry by checking
1211 * the kind of host interrupt controller, a bit like gatwick
1212 * fixes in irq.c. That works well enough for the single case
1213 * where that happens though...
1215 if (macio_irq_count(mdev) == 0) {
1216 printk(KERN_WARNING "ide%d: no intrs for device %s, using 13\n",
1217 i, mdev->ofdev.node->full_name);
1218 irq = irq_create_mapping(NULL, 13);
1220 irq = macio_irq(mdev, 0);
1222 base = ioremap(macio_resource_start(mdev, 0), 0x400);
1223 regbase = (unsigned long) base;
1225 hwif->pci_dev = mdev->bus->pdev;
1226 hwif->gendev.parent = &mdev->ofdev.dev;
1229 pmif->node = mdev->ofdev.node;
1230 pmif->regbase = regbase;
1232 pmif->kauai_fcr = NULL;
1233 #ifdef CONFIG_BLK_DEV_IDEDMA_PMAC
1234 if (macio_resource_count(mdev) >= 2) {
1235 if (macio_request_resource(mdev, 1, "ide-pmac (dma)"))
1236 printk(KERN_WARNING "ide%d: can't request DMA resource !\n", i);
1238 pmif->dma_regs = ioremap(macio_resource_start(mdev, 1), 0x1000);
1240 pmif->dma_regs = NULL;
1241 #endif /* CONFIG_BLK_DEV_IDEDMA_PMAC */
1242 dev_set_drvdata(&mdev->ofdev.dev, hwif);
1244 rc = pmac_ide_setup_device(pmif, hwif);
1246 /* The inteface is released to the common IDE layer */
1247 dev_set_drvdata(&mdev->ofdev.dev, NULL);
1250 iounmap(pmif->dma_regs);
1251 memset(pmif, 0, sizeof(*pmif));
1252 macio_release_resource(mdev, 0);
1254 macio_release_resource(mdev, 1);
1261 pmac_ide_macio_suspend(struct macio_dev *mdev, pm_message_t mesg)
1263 ide_hwif_t *hwif = (ide_hwif_t *)dev_get_drvdata(&mdev->ofdev.dev);
1266 if (mesg.event != mdev->ofdev.dev.power.power_state.event
1267 && mesg.event == PM_EVENT_SUSPEND) {
1268 rc = pmac_ide_do_suspend(hwif);
1270 mdev->ofdev.dev.power.power_state = mesg;
1277 pmac_ide_macio_resume(struct macio_dev *mdev)
1279 ide_hwif_t *hwif = (ide_hwif_t *)dev_get_drvdata(&mdev->ofdev.dev);
1282 if (mdev->ofdev.dev.power.power_state.event != PM_EVENT_ON) {
1283 rc = pmac_ide_do_resume(hwif);
1285 mdev->ofdev.dev.power.power_state = PMSG_ON;
1292 * Attach to a PCI probed interface
1294 static int __devinit
1295 pmac_ide_pci_attach(struct pci_dev *pdev, const struct pci_device_id *id)
1298 struct device_node *np;
1299 pmac_ide_hwif_t *pmif;
1301 unsigned long rbase, rlen;
1304 np = pci_device_to_OF_node(pdev);
1306 printk(KERN_ERR "ide-pmac: cannot find MacIO node for Kauai ATA interface\n");
1310 while (i < MAX_HWIFS && (ide_hwifs[i].io_ports[IDE_DATA_OFFSET] != 0
1311 || pmac_ide[i].node != NULL))
1313 if (i >= MAX_HWIFS) {
1314 printk(KERN_ERR "ide-pmac: PCI interface attach with no slot\n");
1315 printk(KERN_ERR " %s\n", np->full_name);
1319 pmif = &pmac_ide[i];
1320 hwif = &ide_hwifs[i];
1322 if (pci_enable_device(pdev)) {
1323 printk(KERN_WARNING "ide%i: Can't enable PCI device for %s\n",
1327 pci_set_master(pdev);
1329 if (pci_request_regions(pdev, "Kauai ATA")) {
1330 printk(KERN_ERR "ide%d: Cannot obtain PCI resources for %s\n",
1335 hwif->pci_dev = pdev;
1336 hwif->gendev.parent = &pdev->dev;
1340 rbase = pci_resource_start(pdev, 0);
1341 rlen = pci_resource_len(pdev, 0);
1343 base = ioremap(rbase, rlen);
1344 pmif->regbase = (unsigned long) base + 0x2000;
1345 #ifdef CONFIG_BLK_DEV_IDEDMA_PMAC
1346 pmif->dma_regs = base + 0x1000;
1347 #endif /* CONFIG_BLK_DEV_IDEDMA_PMAC */
1348 pmif->kauai_fcr = base;
1349 pmif->irq = pdev->irq;
1351 pci_set_drvdata(pdev, hwif);
1353 rc = pmac_ide_setup_device(pmif, hwif);
1355 /* The inteface is released to the common IDE layer */
1356 pci_set_drvdata(pdev, NULL);
1358 memset(pmif, 0, sizeof(*pmif));
1359 pci_release_regions(pdev);
1366 pmac_ide_pci_suspend(struct pci_dev *pdev, pm_message_t mesg)
1368 ide_hwif_t *hwif = (ide_hwif_t *)pci_get_drvdata(pdev);
1371 if (mesg.event != pdev->dev.power.power_state.event
1372 && mesg.event == PM_EVENT_SUSPEND) {
1373 rc = pmac_ide_do_suspend(hwif);
1375 pdev->dev.power.power_state = mesg;
1382 pmac_ide_pci_resume(struct pci_dev *pdev)
1384 ide_hwif_t *hwif = (ide_hwif_t *)pci_get_drvdata(pdev);
1387 if (pdev->dev.power.power_state.event != PM_EVENT_ON) {
1388 rc = pmac_ide_do_resume(hwif);
1390 pdev->dev.power.power_state = PMSG_ON;
1396 static struct of_device_id pmac_ide_macio_match[] =
1413 static struct macio_driver pmac_ide_macio_driver =
1416 .match_table = pmac_ide_macio_match,
1417 .probe = pmac_ide_macio_attach,
1418 .suspend = pmac_ide_macio_suspend,
1419 .resume = pmac_ide_macio_resume,
1422 static const struct pci_device_id pmac_ide_pci_match[] = {
1423 { PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_UNI_N_ATA), 0 },
1424 { PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_IPID_ATA100), 0 },
1425 { PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_K2_ATA100), 0 },
1426 { PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_SH_ATA), 0 },
1427 { PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_IPID2_ATA), 0 },
1431 static struct pci_driver pmac_ide_pci_driver = {
1433 .id_table = pmac_ide_pci_match,
1434 .probe = pmac_ide_pci_attach,
1435 .suspend = pmac_ide_pci_suspend,
1436 .resume = pmac_ide_pci_resume,
1438 MODULE_DEVICE_TABLE(pci, pmac_ide_pci_match);
1440 int __init pmac_ide_probe(void)
1444 if (!machine_is(powermac))
1447 #ifdef CONFIG_BLK_DEV_IDE_PMAC_ATA100FIRST
1448 error = pci_register_driver(&pmac_ide_pci_driver);
1451 error = macio_register_driver(&pmac_ide_macio_driver);
1453 pci_unregister_driver(&pmac_ide_pci_driver);
1457 error = macio_register_driver(&pmac_ide_macio_driver);
1460 error = pci_register_driver(&pmac_ide_pci_driver);
1462 macio_unregister_driver(&pmac_ide_macio_driver);
1470 #ifdef CONFIG_BLK_DEV_IDEDMA_PMAC
1473 * pmac_ide_build_dmatable builds the DBDMA command list
1474 * for a transfer and sets the DBDMA channel to point to it.
1477 pmac_ide_build_dmatable(ide_drive_t *drive, struct request *rq)
1479 struct dbdma_cmd *table;
1481 ide_hwif_t *hwif = HWIF(drive);
1482 pmac_ide_hwif_t* pmif = (pmac_ide_hwif_t *)hwif->hwif_data;
1483 volatile struct dbdma_regs __iomem *dma = pmif->dma_regs;
1484 struct scatterlist *sg;
1485 int wr = (rq_data_dir(rq) == WRITE);
1487 /* DMA table is already aligned */
1488 table = (struct dbdma_cmd *) pmif->dma_table_cpu;
1490 /* Make sure DMA controller is stopped (necessary ?) */
1491 writel((RUN|PAUSE|FLUSH|WAKE|DEAD) << 16, &dma->control);
1492 while (readl(&dma->status) & RUN)
1495 hwif->sg_nents = i = ide_build_sglist(drive, rq);
1500 /* Build DBDMA commands list */
1501 sg = hwif->sg_table;
1502 while (i && sg_dma_len(sg)) {
1506 cur_addr = sg_dma_address(sg);
1507 cur_len = sg_dma_len(sg);
1509 if (pmif->broken_dma && cur_addr & (L1_CACHE_BYTES - 1)) {
1510 if (pmif->broken_dma_warn == 0) {
1511 printk(KERN_WARNING "%s: DMA on non aligned address, "
1512 "switching to PIO on Ohare chipset\n", drive->name);
1513 pmif->broken_dma_warn = 1;
1515 goto use_pio_instead;
1518 unsigned int tc = (cur_len < 0xfe00)? cur_len: 0xfe00;
1520 if (count++ >= MAX_DCMDS) {
1521 printk(KERN_WARNING "%s: DMA table too small\n",
1523 goto use_pio_instead;
1525 st_le16(&table->command, wr? OUTPUT_MORE: INPUT_MORE);
1526 st_le16(&table->req_count, tc);
1527 st_le32(&table->phy_addr, cur_addr);
1529 table->xfer_status = 0;
1530 table->res_count = 0;
1539 /* convert the last command to an input/output last command */
1541 st_le16(&table[-1].command, wr? OUTPUT_LAST: INPUT_LAST);
1542 /* add the stop command to the end of the list */
1543 memset(table, 0, sizeof(struct dbdma_cmd));
1544 st_le16(&table->command, DBDMA_STOP);
1546 writel(hwif->dmatable_dma, &dma->cmdptr);
1550 printk(KERN_DEBUG "%s: empty DMA table?\n", drive->name);
1552 pci_unmap_sg(hwif->pci_dev,
1555 hwif->sg_dma_direction);
1556 return 0; /* revert to PIO for this request */
1559 /* Teardown mappings after DMA has completed. */
1561 pmac_ide_destroy_dmatable (ide_drive_t *drive)
1563 ide_hwif_t *hwif = drive->hwif;
1564 struct pci_dev *dev = HWIF(drive)->pci_dev;
1565 struct scatterlist *sg = hwif->sg_table;
1566 int nents = hwif->sg_nents;
1569 pci_unmap_sg(dev, sg, nents, hwif->sg_dma_direction);
1575 * Prepare a DMA transfer. We build the DMA table, adjust the timings for
1576 * a read on KeyLargo ATA/66 and mark us as waiting for DMA completion
1579 pmac_ide_dma_setup(ide_drive_t *drive)
1581 ide_hwif_t *hwif = HWIF(drive);
1582 pmac_ide_hwif_t* pmif = (pmac_ide_hwif_t *)hwif->hwif_data;
1583 struct request *rq = HWGROUP(drive)->rq;
1584 u8 unit = (drive->select.b.unit & 0x01);
1589 ata4 = (pmif->kind == controller_kl_ata4);
1591 if (!pmac_ide_build_dmatable(drive, rq)) {
1592 ide_map_sg(drive, rq);
1596 /* Apple adds 60ns to wrDataSetup on reads */
1597 if (ata4 && (pmif->timings[unit] & TR_66_UDMA_EN)) {
1598 writel(pmif->timings[unit] + (!rq_data_dir(rq) ? 0x00800000UL : 0),
1599 PMAC_IDE_REG(IDE_TIMING_CONFIG));
1600 (void)readl(PMAC_IDE_REG(IDE_TIMING_CONFIG));
1603 drive->waiting_for_dma = 1;
1609 pmac_ide_dma_exec_cmd(ide_drive_t *drive, u8 command)
1611 /* issue cmd to drive */
1612 ide_execute_command(drive, command, &ide_dma_intr, 2*WAIT_CMD, NULL);
1616 * Kick the DMA controller into life after the DMA command has been issued
1620 pmac_ide_dma_start(ide_drive_t *drive)
1622 pmac_ide_hwif_t* pmif = (pmac_ide_hwif_t *)HWIF(drive)->hwif_data;
1623 volatile struct dbdma_regs __iomem *dma;
1625 dma = pmif->dma_regs;
1627 writel((RUN << 16) | RUN, &dma->control);
1628 /* Make sure it gets to the controller right now */
1629 (void)readl(&dma->control);
1633 * After a DMA transfer, make sure the controller is stopped
1636 pmac_ide_dma_end (ide_drive_t *drive)
1638 pmac_ide_hwif_t* pmif = (pmac_ide_hwif_t *)HWIF(drive)->hwif_data;
1639 volatile struct dbdma_regs __iomem *dma;
1644 dma = pmif->dma_regs;
1646 drive->waiting_for_dma = 0;
1647 dstat = readl(&dma->status);
1648 writel(((RUN|WAKE|DEAD) << 16), &dma->control);
1649 pmac_ide_destroy_dmatable(drive);
1650 /* verify good dma status. we don't check for ACTIVE beeing 0. We should...
1651 * in theory, but with ATAPI decices doing buffer underruns, that would
1652 * cause us to disable DMA, which isn't what we want
1654 return (dstat & (RUN|DEAD)) != RUN;
1658 * Check out that the interrupt we got was for us. We can't always know this
1659 * for sure with those Apple interfaces (well, we could on the recent ones but
1660 * that's not implemented yet), on the other hand, we don't have shared interrupts
1661 * so it's not really a problem
1664 pmac_ide_dma_test_irq (ide_drive_t *drive)
1666 pmac_ide_hwif_t* pmif = (pmac_ide_hwif_t *)HWIF(drive)->hwif_data;
1667 volatile struct dbdma_regs __iomem *dma;
1668 unsigned long status, timeout;
1672 dma = pmif->dma_regs;
1674 /* We have to things to deal with here:
1676 * - The dbdma won't stop if the command was started
1677 * but completed with an error without transferring all
1678 * datas. This happens when bad blocks are met during
1679 * a multi-block transfer.
1681 * - The dbdma fifo hasn't yet finished flushing to
1682 * to system memory when the disk interrupt occurs.
1686 /* If ACTIVE is cleared, the STOP command have passed and
1687 * transfer is complete.
1689 status = readl(&dma->status);
1690 if (!(status & ACTIVE))
1692 if (!drive->waiting_for_dma)
1693 printk(KERN_WARNING "ide%d, ide_dma_test_irq \
1694 called while not waiting\n", HWIF(drive)->index);
1696 /* If dbdma didn't execute the STOP command yet, the
1697 * active bit is still set. We consider that we aren't
1698 * sharing interrupts (which is hopefully the case with
1699 * those controllers) and so we just try to flush the
1700 * channel for pending data in the fifo
1703 writel((FLUSH << 16) | FLUSH, &dma->control);
1707 status = readl(&dma->status);
1708 if ((status & FLUSH) == 0)
1710 if (++timeout > 100) {
1711 printk(KERN_WARNING "ide%d, ide_dma_test_irq \
1712 timeout flushing channel\n", HWIF(drive)->index);
1719 static void pmac_ide_dma_host_off(ide_drive_t *drive)
1723 static void pmac_ide_dma_host_on(ide_drive_t *drive)
1728 pmac_ide_dma_lost_irq (ide_drive_t *drive)
1730 pmac_ide_hwif_t* pmif = (pmac_ide_hwif_t *)HWIF(drive)->hwif_data;
1731 volatile struct dbdma_regs __iomem *dma;
1732 unsigned long status;
1736 dma = pmif->dma_regs;
1738 status = readl(&dma->status);
1739 printk(KERN_ERR "ide-pmac lost interrupt, dma status: %lx\n", status);
1743 * Allocate the data structures needed for using DMA with an interface
1744 * and fill the proper list of functions pointers
1747 pmac_ide_setup_dma(pmac_ide_hwif_t *pmif, ide_hwif_t *hwif)
1749 /* We won't need pci_dev if we switch to generic consistent
1752 if (hwif->pci_dev == NULL)
1755 * Allocate space for the DBDMA commands.
1756 * The +2 is +1 for the stop command and +1 to allow for
1757 * aligning the start address to a multiple of 16 bytes.
1759 pmif->dma_table_cpu = (struct dbdma_cmd*)pci_alloc_consistent(
1761 (MAX_DCMDS + 2) * sizeof(struct dbdma_cmd),
1762 &hwif->dmatable_dma);
1763 if (pmif->dma_table_cpu == NULL) {
1764 printk(KERN_ERR "%s: unable to allocate DMA command list\n",
1769 hwif->dma_off_quietly = &ide_dma_off_quietly;
1770 hwif->ide_dma_on = &__ide_dma_on;
1771 hwif->dma_setup = &pmac_ide_dma_setup;
1772 hwif->dma_exec_cmd = &pmac_ide_dma_exec_cmd;
1773 hwif->dma_start = &pmac_ide_dma_start;
1774 hwif->ide_dma_end = &pmac_ide_dma_end;
1775 hwif->ide_dma_test_irq = &pmac_ide_dma_test_irq;
1776 hwif->dma_host_off = &pmac_ide_dma_host_off;
1777 hwif->dma_host_on = &pmac_ide_dma_host_on;
1778 hwif->dma_timeout = &ide_dma_timeout;
1779 hwif->dma_lost_irq = &pmac_ide_dma_lost_irq;
1781 switch(pmif->kind) {
1782 case controller_sh_ata6:
1783 hwif->ultra_mask = pmif->cable_80 ? 0x7f : 0x07;
1784 hwif->mwdma_mask = 0x07;
1785 hwif->swdma_mask = 0x00;
1787 case controller_un_ata6:
1788 case controller_k2_ata6:
1789 hwif->ultra_mask = pmif->cable_80 ? 0x3f : 0x07;
1790 hwif->mwdma_mask = 0x07;
1791 hwif->swdma_mask = 0x00;
1793 case controller_kl_ata4:
1794 hwif->ultra_mask = pmif->cable_80 ? 0x1f : 0x07;
1795 hwif->mwdma_mask = 0x07;
1796 hwif->swdma_mask = 0x00;
1799 hwif->ultra_mask = 0x00;
1800 hwif->mwdma_mask = 0x07;
1801 hwif->swdma_mask = 0x00;
1806 #endif /* CONFIG_BLK_DEV_IDEDMA_PMAC */