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)
441 if (ix >= MAX_HWIFS) {
442 /* Probably a PCI interface... */
443 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; ++i)
444 hw->io_ports[i] = data_port + i - IDE_DATA_OFFSET;
445 hw->io_ports[IDE_CONTROL_OFFSET] = ctrl_port;
449 for (i = 0; i < 8; ++i)
450 hw->io_ports[i] = data_port + i * 0x10;
451 hw->io_ports[8] = data_port + 0x160;
454 *irq = pmac_ide[ix].irq;
456 hw->dev = &pmac_ide[ix].mdev->ofdev.dev;
459 #define PMAC_IDE_REG(x) ((void __iomem *)(IDE_DATA_REG+(x)))
462 * Apply the timings of the proper unit (master/slave) to the shared
463 * timing register when selecting that unit. This version is for
464 * ASICs with a single timing register
467 pmac_ide_selectproc(ide_drive_t *drive)
469 pmac_ide_hwif_t* pmif = (pmac_ide_hwif_t *)HWIF(drive)->hwif_data;
474 if (drive->select.b.unit & 0x01)
475 writel(pmif->timings[1], PMAC_IDE_REG(IDE_TIMING_CONFIG));
477 writel(pmif->timings[0], PMAC_IDE_REG(IDE_TIMING_CONFIG));
478 (void)readl(PMAC_IDE_REG(IDE_TIMING_CONFIG));
482 * Apply the timings of the proper unit (master/slave) to the shared
483 * timing register when selecting that unit. This version is for
484 * ASICs with a dual timing register (Kauai)
487 pmac_ide_kauai_selectproc(ide_drive_t *drive)
489 pmac_ide_hwif_t* pmif = (pmac_ide_hwif_t *)HWIF(drive)->hwif_data;
494 if (drive->select.b.unit & 0x01) {
495 writel(pmif->timings[1], PMAC_IDE_REG(IDE_KAUAI_PIO_CONFIG));
496 writel(pmif->timings[3], PMAC_IDE_REG(IDE_KAUAI_ULTRA_CONFIG));
498 writel(pmif->timings[0], PMAC_IDE_REG(IDE_KAUAI_PIO_CONFIG));
499 writel(pmif->timings[2], PMAC_IDE_REG(IDE_KAUAI_ULTRA_CONFIG));
501 (void)readl(PMAC_IDE_REG(IDE_KAUAI_PIO_CONFIG));
505 * Force an update of controller timing values for a given drive
508 pmac_ide_do_update_timings(ide_drive_t *drive)
510 pmac_ide_hwif_t* pmif = (pmac_ide_hwif_t *)HWIF(drive)->hwif_data;
515 if (pmif->kind == controller_sh_ata6 ||
516 pmif->kind == controller_un_ata6 ||
517 pmif->kind == controller_k2_ata6)
518 pmac_ide_kauai_selectproc(drive);
520 pmac_ide_selectproc(drive);
524 pmac_outbsync(ide_drive_t *drive, u8 value, unsigned long port)
528 writeb(value, (void __iomem *) port);
529 tmp = readl(PMAC_IDE_REG(IDE_TIMING_CONFIG));
533 * Old tuning functions (called on hdparm -p), sets up drive PIO timings
536 pmac_ide_set_pio_mode(ide_drive_t *drive, const u8 pio)
539 unsigned accessTicks, recTicks;
540 unsigned accessTime, recTime;
541 pmac_ide_hwif_t* pmif = (pmac_ide_hwif_t *)HWIF(drive)->hwif_data;
542 unsigned int cycle_time;
547 /* which drive is it ? */
548 timings = &pmif->timings[drive->select.b.unit & 0x01];
551 cycle_time = ide_pio_cycle_time(drive, pio);
553 switch (pmif->kind) {
554 case controller_sh_ata6: {
556 u32 tr = kauai_lookup_timing(shasta_pio_timings, cycle_time);
557 t = (t & ~TR_133_PIOREG_PIO_MASK) | tr;
560 case controller_un_ata6:
561 case controller_k2_ata6: {
563 u32 tr = kauai_lookup_timing(kauai_pio_timings, cycle_time);
564 t = (t & ~TR_100_PIOREG_PIO_MASK) | tr;
567 case controller_kl_ata4:
569 recTime = cycle_time - ide_pio_timings[pio].active_time
570 - ide_pio_timings[pio].setup_time;
571 recTime = max(recTime, 150U);
572 accessTime = ide_pio_timings[pio].active_time;
573 accessTime = max(accessTime, 150U);
574 accessTicks = SYSCLK_TICKS_66(accessTime);
575 accessTicks = min(accessTicks, 0x1fU);
576 recTicks = SYSCLK_TICKS_66(recTime);
577 recTicks = min(recTicks, 0x1fU);
578 t = (t & ~TR_66_PIO_MASK) |
579 (accessTicks << TR_66_PIO_ACCESS_SHIFT) |
580 (recTicks << TR_66_PIO_RECOVERY_SHIFT);
585 recTime = cycle_time - ide_pio_timings[pio].active_time
586 - ide_pio_timings[pio].setup_time;
587 recTime = max(recTime, 150U);
588 accessTime = ide_pio_timings[pio].active_time;
589 accessTime = max(accessTime, 150U);
590 accessTicks = SYSCLK_TICKS(accessTime);
591 accessTicks = min(accessTicks, 0x1fU);
592 accessTicks = max(accessTicks, 4U);
593 recTicks = SYSCLK_TICKS(recTime);
594 recTicks = min(recTicks, 0x1fU);
595 recTicks = max(recTicks, 5U) - 4;
597 recTicks--; /* guess, but it's only for PIO0, so... */
600 t = (t & ~TR_33_PIO_MASK) |
601 (accessTicks << TR_33_PIO_ACCESS_SHIFT) |
602 (recTicks << TR_33_PIO_RECOVERY_SHIFT);
609 #ifdef IDE_PMAC_DEBUG
610 printk(KERN_ERR "%s: Set PIO timing for mode %d, reg: 0x%08x\n",
611 drive->name, pio, *timings);
615 pmac_ide_do_update_timings(drive);
618 #ifdef CONFIG_BLK_DEV_IDEDMA_PMAC
621 * Calculate KeyLargo ATA/66 UDMA timings
624 set_timings_udma_ata4(u32 *timings, u8 speed)
626 unsigned rdyToPauseTicks, wrDataSetupTicks, addrTicks;
628 if (speed > XFER_UDMA_4)
631 rdyToPauseTicks = SYSCLK_TICKS_66(kl66_udma_timings[speed & 0xf].rdy2pause);
632 wrDataSetupTicks = SYSCLK_TICKS_66(kl66_udma_timings[speed & 0xf].wrDataSetup);
633 addrTicks = SYSCLK_TICKS_66(kl66_udma_timings[speed & 0xf].addrSetup);
635 *timings = ((*timings) & ~(TR_66_UDMA_MASK | TR_66_MDMA_MASK)) |
636 (wrDataSetupTicks << TR_66_UDMA_WRDATASETUP_SHIFT) |
637 (rdyToPauseTicks << TR_66_UDMA_RDY2PAUS_SHIFT) |
638 (addrTicks <<TR_66_UDMA_ADDRSETUP_SHIFT) |
640 #ifdef IDE_PMAC_DEBUG
641 printk(KERN_ERR "ide_pmac: Set UDMA timing for mode %d, reg: 0x%08x\n",
642 speed & 0xf, *timings);
649 * Calculate Kauai ATA/100 UDMA timings
652 set_timings_udma_ata6(u32 *pio_timings, u32 *ultra_timings, u8 speed)
654 struct ide_timing *t = ide_timing_find_mode(speed);
657 if (speed > XFER_UDMA_5 || t == NULL)
659 tr = kauai_lookup_timing(kauai_udma_timings, (int)t->udma);
660 *ultra_timings = ((*ultra_timings) & ~TR_100_UDMAREG_UDMA_MASK) | tr;
661 *ultra_timings = (*ultra_timings) | TR_100_UDMAREG_UDMA_EN;
667 * Calculate Shasta ATA/133 UDMA timings
670 set_timings_udma_shasta(u32 *pio_timings, u32 *ultra_timings, u8 speed)
672 struct ide_timing *t = ide_timing_find_mode(speed);
675 if (speed > XFER_UDMA_6 || t == NULL)
677 tr = kauai_lookup_timing(shasta_udma133_timings, (int)t->udma);
678 *ultra_timings = ((*ultra_timings) & ~TR_133_UDMAREG_UDMA_MASK) | tr;
679 *ultra_timings = (*ultra_timings) | TR_133_UDMAREG_UDMA_EN;
685 * Calculate MDMA timings for all cells
688 set_timings_mdma(ide_drive_t *drive, int intf_type, u32 *timings, u32 *timings2,
691 int cycleTime, accessTime = 0, recTime = 0;
692 unsigned accessTicks, recTicks;
693 struct hd_driveid *id = drive->id;
694 struct mdma_timings_t* tm = NULL;
697 /* Get default cycle time for mode */
698 switch(speed & 0xf) {
699 case 0: cycleTime = 480; break;
700 case 1: cycleTime = 150; break;
701 case 2: cycleTime = 120; break;
707 /* Check if drive provides explicit DMA cycle time */
708 if ((id->field_valid & 2) && id->eide_dma_time)
709 cycleTime = max_t(int, id->eide_dma_time, cycleTime);
711 /* OHare limits according to some old Apple sources */
712 if ((intf_type == controller_ohare) && (cycleTime < 150))
714 /* Get the proper timing array for this controller */
716 case controller_sh_ata6:
717 case controller_un_ata6:
718 case controller_k2_ata6:
720 case controller_kl_ata4:
721 tm = mdma_timings_66;
723 case controller_kl_ata3:
724 tm = mdma_timings_33k;
727 tm = mdma_timings_33;
731 /* Lookup matching access & recovery times */
734 if (tm[i+1].cycleTime < cycleTime)
738 cycleTime = tm[i].cycleTime;
739 accessTime = tm[i].accessTime;
740 recTime = tm[i].recoveryTime;
742 #ifdef IDE_PMAC_DEBUG
743 printk(KERN_ERR "%s: MDMA, cycleTime: %d, accessTime: %d, recTime: %d\n",
744 drive->name, cycleTime, accessTime, recTime);
748 case controller_sh_ata6: {
750 u32 tr = kauai_lookup_timing(shasta_mdma_timings, cycleTime);
751 *timings = ((*timings) & ~TR_133_PIOREG_MDMA_MASK) | tr;
752 *timings2 = (*timings2) & ~TR_133_UDMAREG_UDMA_EN;
754 case controller_un_ata6:
755 case controller_k2_ata6: {
757 u32 tr = kauai_lookup_timing(kauai_mdma_timings, cycleTime);
758 *timings = ((*timings) & ~TR_100_PIOREG_MDMA_MASK) | tr;
759 *timings2 = (*timings2) & ~TR_100_UDMAREG_UDMA_EN;
762 case controller_kl_ata4:
764 accessTicks = SYSCLK_TICKS_66(accessTime);
765 accessTicks = min(accessTicks, 0x1fU);
766 accessTicks = max(accessTicks, 0x1U);
767 recTicks = SYSCLK_TICKS_66(recTime);
768 recTicks = min(recTicks, 0x1fU);
769 recTicks = max(recTicks, 0x3U);
770 /* Clear out mdma bits and disable udma */
771 *timings = ((*timings) & ~(TR_66_MDMA_MASK | TR_66_UDMA_MASK)) |
772 (accessTicks << TR_66_MDMA_ACCESS_SHIFT) |
773 (recTicks << TR_66_MDMA_RECOVERY_SHIFT);
775 case controller_kl_ata3:
776 /* 33Mhz cell on KeyLargo */
777 accessTicks = SYSCLK_TICKS(accessTime);
778 accessTicks = max(accessTicks, 1U);
779 accessTicks = min(accessTicks, 0x1fU);
780 accessTime = accessTicks * IDE_SYSCLK_NS;
781 recTicks = SYSCLK_TICKS(recTime);
782 recTicks = max(recTicks, 1U);
783 recTicks = min(recTicks, 0x1fU);
784 *timings = ((*timings) & ~TR_33_MDMA_MASK) |
785 (accessTicks << TR_33_MDMA_ACCESS_SHIFT) |
786 (recTicks << TR_33_MDMA_RECOVERY_SHIFT);
789 /* 33Mhz cell on others */
791 int origAccessTime = accessTime;
792 int origRecTime = recTime;
794 accessTicks = SYSCLK_TICKS(accessTime);
795 accessTicks = max(accessTicks, 1U);
796 accessTicks = min(accessTicks, 0x1fU);
797 accessTime = accessTicks * IDE_SYSCLK_NS;
798 recTicks = SYSCLK_TICKS(recTime);
799 recTicks = max(recTicks, 2U) - 1;
800 recTicks = min(recTicks, 0x1fU);
801 recTime = (recTicks + 1) * IDE_SYSCLK_NS;
802 if ((accessTicks > 1) &&
803 ((accessTime - IDE_SYSCLK_NS/2) >= origAccessTime) &&
804 ((recTime - IDE_SYSCLK_NS/2) >= origRecTime)) {
808 *timings = ((*timings) & ~TR_33_MDMA_MASK) |
809 (accessTicks << TR_33_MDMA_ACCESS_SHIFT) |
810 (recTicks << TR_33_MDMA_RECOVERY_SHIFT);
812 *timings |= TR_33_MDMA_HALFTICK;
815 #ifdef IDE_PMAC_DEBUG
816 printk(KERN_ERR "%s: Set MDMA timing for mode %d, reg: 0x%08x\n",
817 drive->name, speed & 0xf, *timings);
820 #endif /* #ifdef CONFIG_BLK_DEV_IDEDMA_PMAC */
822 static void pmac_ide_set_dma_mode(ide_drive_t *drive, const u8 speed)
824 int unit = (drive->select.b.unit & 0x01);
826 pmac_ide_hwif_t* pmif = (pmac_ide_hwif_t *)HWIF(drive)->hwif_data;
827 u32 *timings, *timings2, tl[2];
829 timings = &pmif->timings[unit];
830 timings2 = &pmif->timings[unit+2];
832 /* Copy timings to local image */
837 #ifdef CONFIG_BLK_DEV_IDEDMA_PMAC
845 if (pmif->kind == controller_kl_ata4)
846 ret = set_timings_udma_ata4(&tl[0], speed);
847 else if (pmif->kind == controller_un_ata6
848 || pmif->kind == controller_k2_ata6)
849 ret = set_timings_udma_ata6(&tl[0], &tl[1], speed);
850 else if (pmif->kind == controller_sh_ata6)
851 ret = set_timings_udma_shasta(&tl[0], &tl[1], speed);
858 set_timings_mdma(drive, pmif->kind, &tl[0], &tl[1], speed);
864 #endif /* CONFIG_BLK_DEV_IDEDMA_PMAC */
871 /* Apply timings to controller */
875 pmac_ide_do_update_timings(drive);
879 * Blast some well known "safe" values to the timing registers at init or
880 * wakeup from sleep time, before we do real calculation
883 sanitize_timings(pmac_ide_hwif_t *pmif)
885 unsigned int value, value2 = 0;
888 case controller_sh_ata6:
892 case controller_un_ata6:
893 case controller_k2_ata6:
897 case controller_kl_ata4:
900 case controller_kl_ata3:
903 case controller_heathrow:
904 case controller_ohare:
909 pmif->timings[0] = pmif->timings[1] = value;
910 pmif->timings[2] = pmif->timings[3] = value2;
914 pmac_ide_get_base(int index)
916 return pmac_ide[index].regbase;
920 pmac_ide_check_base(unsigned long base)
924 for (ix = 0; ix < MAX_HWIFS; ++ix)
925 if (base == pmac_ide[ix].regbase)
931 pmac_ide_get_irq(unsigned long base)
935 for (ix = 0; ix < MAX_HWIFS; ++ix)
936 if (base == pmac_ide[ix].regbase)
937 return pmac_ide[ix].irq;
941 static int ide_majors[] = { 3, 22, 33, 34, 56, 57 };
944 pmac_find_ide_boot(char *bootdevice, int n)
949 * Look through the list of IDE interfaces for this one.
951 for (i = 0; i < pmac_ide_count; ++i) {
953 if (!pmac_ide[i].node || !pmac_ide[i].node->full_name)
955 name = pmac_ide[i].node->full_name;
956 if (memcmp(name, bootdevice, n) == 0 && name[n] == 0) {
957 /* XXX should cope with the 2nd drive as well... */
958 return MKDEV(ide_majors[i], 0);
965 /* Suspend call back, should be called after the child devices
966 * have actually been suspended
969 pmac_ide_do_suspend(ide_hwif_t *hwif)
971 pmac_ide_hwif_t *pmif = (pmac_ide_hwif_t *)hwif->hwif_data;
973 /* We clear the timings */
974 pmif->timings[0] = 0;
975 pmif->timings[1] = 0;
977 disable_irq(pmif->irq);
979 /* The media bay will handle itself just fine */
983 /* Kauai has bus control FCRs directly here */
984 if (pmif->kauai_fcr) {
985 u32 fcr = readl(pmif->kauai_fcr);
986 fcr &= ~(KAUAI_FCR_UATA_RESET_N | KAUAI_FCR_UATA_ENABLE);
987 writel(fcr, pmif->kauai_fcr);
990 /* Disable the bus on older machines and the cell on kauai */
991 ppc_md.feature_call(PMAC_FTR_IDE_ENABLE, pmif->node, pmif->aapl_bus_id,
997 /* Resume call back, should be called before the child devices
1001 pmac_ide_do_resume(ide_hwif_t *hwif)
1003 pmac_ide_hwif_t *pmif = (pmac_ide_hwif_t *)hwif->hwif_data;
1005 /* Hard reset & re-enable controller (do we really need to reset ? -BenH) */
1006 if (!pmif->mediabay) {
1007 ppc_md.feature_call(PMAC_FTR_IDE_RESET, pmif->node, pmif->aapl_bus_id, 1);
1008 ppc_md.feature_call(PMAC_FTR_IDE_ENABLE, pmif->node, pmif->aapl_bus_id, 1);
1010 ppc_md.feature_call(PMAC_FTR_IDE_RESET, pmif->node, pmif->aapl_bus_id, 0);
1012 /* Kauai has it different */
1013 if (pmif->kauai_fcr) {
1014 u32 fcr = readl(pmif->kauai_fcr);
1015 fcr |= KAUAI_FCR_UATA_RESET_N | KAUAI_FCR_UATA_ENABLE;
1016 writel(fcr, pmif->kauai_fcr);
1019 msleep(jiffies_to_msecs(IDE_WAKEUP_DELAY));
1022 /* Sanitize drive timings */
1023 sanitize_timings(pmif);
1025 enable_irq(pmif->irq);
1031 * Setup, register & probe an IDE channel driven by this driver, this is
1032 * called by one of the 2 probe functions (macio or PCI). Note that a channel
1033 * that ends up beeing free of any device is not kept around by this driver
1034 * (it is kept in 2.4). This introduce an interface numbering change on some
1035 * rare machines unfortunately, but it's better this way.
1038 pmac_ide_setup_device(pmac_ide_hwif_t *pmif, ide_hwif_t *hwif)
1040 struct device_node *np = pmif->node;
1042 u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
1046 pmif->broken_dma = pmif->broken_dma_warn = 0;
1047 if (of_device_is_compatible(np, "shasta-ata"))
1048 pmif->kind = controller_sh_ata6;
1049 else if (of_device_is_compatible(np, "kauai-ata"))
1050 pmif->kind = controller_un_ata6;
1051 else if (of_device_is_compatible(np, "K2-UATA"))
1052 pmif->kind = controller_k2_ata6;
1053 else if (of_device_is_compatible(np, "keylargo-ata")) {
1054 if (strcmp(np->name, "ata-4") == 0)
1055 pmif->kind = controller_kl_ata4;
1057 pmif->kind = controller_kl_ata3;
1058 } else if (of_device_is_compatible(np, "heathrow-ata"))
1059 pmif->kind = controller_heathrow;
1061 pmif->kind = controller_ohare;
1062 pmif->broken_dma = 1;
1065 bidp = of_get_property(np, "AAPL,bus-id", NULL);
1066 pmif->aapl_bus_id = bidp ? *bidp : 0;
1068 /* Get cable type from device-tree */
1069 if (pmif->kind == controller_kl_ata4 || pmif->kind == controller_un_ata6
1070 || pmif->kind == controller_k2_ata6
1071 || pmif->kind == controller_sh_ata6) {
1072 const char* cable = of_get_property(np, "cable-type", NULL);
1073 if (cable && !strncmp(cable, "80-", 3))
1076 /* G5's seem to have incorrect cable type in device-tree. Let's assume
1077 * they have a 80 conductor cable, this seem to be always the case unless
1078 * the user mucked around
1080 if (of_device_is_compatible(np, "K2-UATA") ||
1081 of_device_is_compatible(np, "shasta-ata"))
1084 /* On Kauai-type controllers, we make sure the FCR is correct */
1085 if (pmif->kauai_fcr)
1086 writel(KAUAI_FCR_UATA_MAGIC |
1087 KAUAI_FCR_UATA_RESET_N |
1088 KAUAI_FCR_UATA_ENABLE, pmif->kauai_fcr);
1092 /* Make sure we have sane timings */
1093 sanitize_timings(pmif);
1095 #ifndef CONFIG_PPC64
1096 /* XXX FIXME: Media bay stuff need re-organizing */
1097 if (np->parent && np->parent->name
1098 && strcasecmp(np->parent->name, "media-bay") == 0) {
1099 #ifdef CONFIG_PMAC_MEDIABAY
1100 media_bay_set_ide_infos(np->parent, pmif->regbase, pmif->irq, hwif->index);
1101 #endif /* CONFIG_PMAC_MEDIABAY */
1104 pmif->aapl_bus_id = 1;
1105 } else if (pmif->kind == controller_ohare) {
1106 /* The code below is having trouble on some ohare machines
1107 * (timing related ?). Until I can put my hand on one of these
1108 * units, I keep the old way
1110 ppc_md.feature_call(PMAC_FTR_IDE_ENABLE, np, 0, 1);
1114 /* This is necessary to enable IDE when net-booting */
1115 ppc_md.feature_call(PMAC_FTR_IDE_RESET, np, pmif->aapl_bus_id, 1);
1116 ppc_md.feature_call(PMAC_FTR_IDE_ENABLE, np, pmif->aapl_bus_id, 1);
1118 ppc_md.feature_call(PMAC_FTR_IDE_RESET, np, pmif->aapl_bus_id, 0);
1119 msleep(jiffies_to_msecs(IDE_WAKEUP_DELAY));
1122 /* Setup MMIO ops */
1123 default_hwif_mmiops(hwif);
1124 hwif->OUTBSYNC = pmac_outbsync;
1126 /* Tell common code _not_ to mess with resources */
1128 hwif->hwif_data = pmif;
1129 memset(&hw, 0, sizeof(hw));
1130 pmac_ide_init_hwif_ports(&hw, pmif->regbase, 0, &hwif->irq);
1131 memcpy(hwif->io_ports, hw.io_ports, sizeof(hwif->io_ports));
1132 hwif->chipset = ide_pmac;
1133 hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET] || pmif->mediabay;
1134 hwif->hold = pmif->mediabay;
1135 hwif->cbl = pmif->cable_80 ? ATA_CBL_PATA80 : ATA_CBL_PATA40;
1136 hwif->drives[0].unmask = 1;
1137 hwif->drives[1].unmask = 1;
1138 hwif->drives[0].autotune = IDE_TUNE_AUTO;
1139 hwif->drives[1].autotune = IDE_TUNE_AUTO;
1140 hwif->host_flags = IDE_HFLAG_SET_PIO_MODE_KEEP_DMA |
1141 IDE_HFLAG_POST_SET_MODE;
1142 hwif->pio_mask = ATA_PIO4;
1143 hwif->set_pio_mode = pmac_ide_set_pio_mode;
1144 if (pmif->kind == controller_un_ata6
1145 || pmif->kind == controller_k2_ata6
1146 || pmif->kind == controller_sh_ata6)
1147 hwif->selectproc = pmac_ide_kauai_selectproc;
1149 hwif->selectproc = pmac_ide_selectproc;
1150 hwif->set_dma_mode = pmac_ide_set_dma_mode;
1152 printk(KERN_INFO "ide%d: Found Apple %s controller, bus ID %d%s, irq %d\n",
1153 hwif->index, model_name[pmif->kind], pmif->aapl_bus_id,
1154 pmif->mediabay ? " (mediabay)" : "", hwif->irq);
1156 #ifdef CONFIG_PMAC_MEDIABAY
1157 if (pmif->mediabay && check_media_bay_by_base(pmif->regbase, MB_CD) == 0)
1159 #endif /* CONFIG_PMAC_MEDIABAY */
1161 hwif->sg_max_nents = MAX_DCMDS;
1163 #ifdef CONFIG_BLK_DEV_IDEDMA_PMAC
1164 /* has a DBDMA controller channel */
1166 pmac_ide_setup_dma(pmif, hwif);
1167 #endif /* CONFIG_BLK_DEV_IDEDMA_PMAC */
1169 idx[0] = hwif->index;
1171 ide_device_add(idx);
1177 * Attach to a macio probed interface
1179 static int __devinit
1180 pmac_ide_macio_attach(struct macio_dev *mdev, const struct of_device_id *match)
1183 unsigned long regbase;
1186 pmac_ide_hwif_t *pmif;
1190 while (i < MAX_HWIFS && (ide_hwifs[i].io_ports[IDE_DATA_OFFSET] != 0
1191 || pmac_ide[i].node != NULL))
1193 if (i >= MAX_HWIFS) {
1194 printk(KERN_ERR "ide-pmac: MacIO interface attach with no slot\n");
1195 printk(KERN_ERR " %s\n", mdev->ofdev.node->full_name);
1199 pmif = &pmac_ide[i];
1200 hwif = &ide_hwifs[i];
1202 if (macio_resource_count(mdev) == 0) {
1203 printk(KERN_WARNING "ide%d: no address for %s\n",
1204 i, mdev->ofdev.node->full_name);
1208 /* Request memory resource for IO ports */
1209 if (macio_request_resource(mdev, 0, "ide-pmac (ports)")) {
1210 printk(KERN_ERR "ide%d: can't request mmio resource !\n", i);
1214 /* XXX This is bogus. Should be fixed in the registry by checking
1215 * the kind of host interrupt controller, a bit like gatwick
1216 * fixes in irq.c. That works well enough for the single case
1217 * where that happens though...
1219 if (macio_irq_count(mdev) == 0) {
1220 printk(KERN_WARNING "ide%d: no intrs for device %s, using 13\n",
1221 i, mdev->ofdev.node->full_name);
1222 irq = irq_create_mapping(NULL, 13);
1224 irq = macio_irq(mdev, 0);
1226 base = ioremap(macio_resource_start(mdev, 0), 0x400);
1227 regbase = (unsigned long) base;
1229 hwif->pci_dev = mdev->bus->pdev;
1230 hwif->gendev.parent = &mdev->ofdev.dev;
1233 pmif->node = mdev->ofdev.node;
1234 pmif->regbase = regbase;
1236 pmif->kauai_fcr = NULL;
1237 #ifdef CONFIG_BLK_DEV_IDEDMA_PMAC
1238 if (macio_resource_count(mdev) >= 2) {
1239 if (macio_request_resource(mdev, 1, "ide-pmac (dma)"))
1240 printk(KERN_WARNING "ide%d: can't request DMA resource !\n", i);
1242 pmif->dma_regs = ioremap(macio_resource_start(mdev, 1), 0x1000);
1244 pmif->dma_regs = NULL;
1245 #endif /* CONFIG_BLK_DEV_IDEDMA_PMAC */
1246 dev_set_drvdata(&mdev->ofdev.dev, hwif);
1248 rc = pmac_ide_setup_device(pmif, hwif);
1250 /* The inteface is released to the common IDE layer */
1251 dev_set_drvdata(&mdev->ofdev.dev, NULL);
1254 iounmap(pmif->dma_regs);
1255 memset(pmif, 0, sizeof(*pmif));
1256 macio_release_resource(mdev, 0);
1258 macio_release_resource(mdev, 1);
1265 pmac_ide_macio_suspend(struct macio_dev *mdev, pm_message_t mesg)
1267 ide_hwif_t *hwif = (ide_hwif_t *)dev_get_drvdata(&mdev->ofdev.dev);
1270 if (mesg.event != mdev->ofdev.dev.power.power_state.event
1271 && mesg.event == PM_EVENT_SUSPEND) {
1272 rc = pmac_ide_do_suspend(hwif);
1274 mdev->ofdev.dev.power.power_state = mesg;
1281 pmac_ide_macio_resume(struct macio_dev *mdev)
1283 ide_hwif_t *hwif = (ide_hwif_t *)dev_get_drvdata(&mdev->ofdev.dev);
1286 if (mdev->ofdev.dev.power.power_state.event != PM_EVENT_ON) {
1287 rc = pmac_ide_do_resume(hwif);
1289 mdev->ofdev.dev.power.power_state = PMSG_ON;
1296 * Attach to a PCI probed interface
1298 static int __devinit
1299 pmac_ide_pci_attach(struct pci_dev *pdev, const struct pci_device_id *id)
1302 struct device_node *np;
1303 pmac_ide_hwif_t *pmif;
1305 unsigned long rbase, rlen;
1308 np = pci_device_to_OF_node(pdev);
1310 printk(KERN_ERR "ide-pmac: cannot find MacIO node for Kauai ATA interface\n");
1314 while (i < MAX_HWIFS && (ide_hwifs[i].io_ports[IDE_DATA_OFFSET] != 0
1315 || pmac_ide[i].node != NULL))
1317 if (i >= MAX_HWIFS) {
1318 printk(KERN_ERR "ide-pmac: PCI interface attach with no slot\n");
1319 printk(KERN_ERR " %s\n", np->full_name);
1323 pmif = &pmac_ide[i];
1324 hwif = &ide_hwifs[i];
1326 if (pci_enable_device(pdev)) {
1327 printk(KERN_WARNING "ide%i: Can't enable PCI device for %s\n",
1331 pci_set_master(pdev);
1333 if (pci_request_regions(pdev, "Kauai ATA")) {
1334 printk(KERN_ERR "ide%d: Cannot obtain PCI resources for %s\n",
1339 hwif->pci_dev = pdev;
1340 hwif->gendev.parent = &pdev->dev;
1344 rbase = pci_resource_start(pdev, 0);
1345 rlen = pci_resource_len(pdev, 0);
1347 base = ioremap(rbase, rlen);
1348 pmif->regbase = (unsigned long) base + 0x2000;
1349 #ifdef CONFIG_BLK_DEV_IDEDMA_PMAC
1350 pmif->dma_regs = base + 0x1000;
1351 #endif /* CONFIG_BLK_DEV_IDEDMA_PMAC */
1352 pmif->kauai_fcr = base;
1353 pmif->irq = pdev->irq;
1355 pci_set_drvdata(pdev, hwif);
1357 rc = pmac_ide_setup_device(pmif, hwif);
1359 /* The inteface is released to the common IDE layer */
1360 pci_set_drvdata(pdev, NULL);
1362 memset(pmif, 0, sizeof(*pmif));
1363 pci_release_regions(pdev);
1370 pmac_ide_pci_suspend(struct pci_dev *pdev, pm_message_t mesg)
1372 ide_hwif_t *hwif = (ide_hwif_t *)pci_get_drvdata(pdev);
1375 if (mesg.event != pdev->dev.power.power_state.event
1376 && mesg.event == PM_EVENT_SUSPEND) {
1377 rc = pmac_ide_do_suspend(hwif);
1379 pdev->dev.power.power_state = mesg;
1386 pmac_ide_pci_resume(struct pci_dev *pdev)
1388 ide_hwif_t *hwif = (ide_hwif_t *)pci_get_drvdata(pdev);
1391 if (pdev->dev.power.power_state.event != PM_EVENT_ON) {
1392 rc = pmac_ide_do_resume(hwif);
1394 pdev->dev.power.power_state = PMSG_ON;
1400 static struct of_device_id pmac_ide_macio_match[] =
1417 static struct macio_driver pmac_ide_macio_driver =
1420 .match_table = pmac_ide_macio_match,
1421 .probe = pmac_ide_macio_attach,
1422 .suspend = pmac_ide_macio_suspend,
1423 .resume = pmac_ide_macio_resume,
1426 static const struct pci_device_id pmac_ide_pci_match[] = {
1427 { PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_UNI_N_ATA), 0 },
1428 { PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_IPID_ATA100), 0 },
1429 { PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_K2_ATA100), 0 },
1430 { PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_SH_ATA), 0 },
1431 { PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_IPID2_ATA), 0 },
1435 static struct pci_driver pmac_ide_pci_driver = {
1437 .id_table = pmac_ide_pci_match,
1438 .probe = pmac_ide_pci_attach,
1439 .suspend = pmac_ide_pci_suspend,
1440 .resume = pmac_ide_pci_resume,
1442 MODULE_DEVICE_TABLE(pci, pmac_ide_pci_match);
1444 int __init pmac_ide_probe(void)
1448 if (!machine_is(powermac))
1451 #ifdef CONFIG_BLK_DEV_IDE_PMAC_ATA100FIRST
1452 error = pci_register_driver(&pmac_ide_pci_driver);
1455 error = macio_register_driver(&pmac_ide_macio_driver);
1457 pci_unregister_driver(&pmac_ide_pci_driver);
1461 error = macio_register_driver(&pmac_ide_macio_driver);
1464 error = pci_register_driver(&pmac_ide_pci_driver);
1466 macio_unregister_driver(&pmac_ide_macio_driver);
1474 #ifdef CONFIG_BLK_DEV_IDEDMA_PMAC
1477 * pmac_ide_build_dmatable builds the DBDMA command list
1478 * for a transfer and sets the DBDMA channel to point to it.
1481 pmac_ide_build_dmatable(ide_drive_t *drive, struct request *rq)
1483 struct dbdma_cmd *table;
1485 ide_hwif_t *hwif = HWIF(drive);
1486 pmac_ide_hwif_t* pmif = (pmac_ide_hwif_t *)hwif->hwif_data;
1487 volatile struct dbdma_regs __iomem *dma = pmif->dma_regs;
1488 struct scatterlist *sg;
1489 int wr = (rq_data_dir(rq) == WRITE);
1491 /* DMA table is already aligned */
1492 table = (struct dbdma_cmd *) pmif->dma_table_cpu;
1494 /* Make sure DMA controller is stopped (necessary ?) */
1495 writel((RUN|PAUSE|FLUSH|WAKE|DEAD) << 16, &dma->control);
1496 while (readl(&dma->status) & RUN)
1499 hwif->sg_nents = i = ide_build_sglist(drive, rq);
1504 /* Build DBDMA commands list */
1505 sg = hwif->sg_table;
1506 while (i && sg_dma_len(sg)) {
1510 cur_addr = sg_dma_address(sg);
1511 cur_len = sg_dma_len(sg);
1513 if (pmif->broken_dma && cur_addr & (L1_CACHE_BYTES - 1)) {
1514 if (pmif->broken_dma_warn == 0) {
1515 printk(KERN_WARNING "%s: DMA on non aligned address,"
1516 "switching to PIO on Ohare chipset\n", drive->name);
1517 pmif->broken_dma_warn = 1;
1519 goto use_pio_instead;
1522 unsigned int tc = (cur_len < 0xfe00)? cur_len: 0xfe00;
1524 if (count++ >= MAX_DCMDS) {
1525 printk(KERN_WARNING "%s: DMA table too small\n",
1527 goto use_pio_instead;
1529 st_le16(&table->command, wr? OUTPUT_MORE: INPUT_MORE);
1530 st_le16(&table->req_count, tc);
1531 st_le32(&table->phy_addr, cur_addr);
1533 table->xfer_status = 0;
1534 table->res_count = 0;
1543 /* convert the last command to an input/output last command */
1545 st_le16(&table[-1].command, wr? OUTPUT_LAST: INPUT_LAST);
1546 /* add the stop command to the end of the list */
1547 memset(table, 0, sizeof(struct dbdma_cmd));
1548 st_le16(&table->command, DBDMA_STOP);
1550 writel(hwif->dmatable_dma, &dma->cmdptr);
1554 printk(KERN_DEBUG "%s: empty DMA table?\n", drive->name);
1556 pci_unmap_sg(hwif->pci_dev,
1559 hwif->sg_dma_direction);
1560 return 0; /* revert to PIO for this request */
1563 /* Teardown mappings after DMA has completed. */
1565 pmac_ide_destroy_dmatable (ide_drive_t *drive)
1567 ide_hwif_t *hwif = drive->hwif;
1568 struct pci_dev *dev = HWIF(drive)->pci_dev;
1569 struct scatterlist *sg = hwif->sg_table;
1570 int nents = hwif->sg_nents;
1573 pci_unmap_sg(dev, sg, nents, hwif->sg_dma_direction);
1579 * Prepare a DMA transfer. We build the DMA table, adjust the timings for
1580 * a read on KeyLargo ATA/66 and mark us as waiting for DMA completion
1583 pmac_ide_dma_setup(ide_drive_t *drive)
1585 ide_hwif_t *hwif = HWIF(drive);
1586 pmac_ide_hwif_t* pmif = (pmac_ide_hwif_t *)hwif->hwif_data;
1587 struct request *rq = HWGROUP(drive)->rq;
1588 u8 unit = (drive->select.b.unit & 0x01);
1593 ata4 = (pmif->kind == controller_kl_ata4);
1595 if (!pmac_ide_build_dmatable(drive, rq)) {
1596 ide_map_sg(drive, rq);
1600 /* Apple adds 60ns to wrDataSetup on reads */
1601 if (ata4 && (pmif->timings[unit] & TR_66_UDMA_EN)) {
1602 writel(pmif->timings[unit] + (!rq_data_dir(rq) ? 0x00800000UL : 0),
1603 PMAC_IDE_REG(IDE_TIMING_CONFIG));
1604 (void)readl(PMAC_IDE_REG(IDE_TIMING_CONFIG));
1607 drive->waiting_for_dma = 1;
1613 pmac_ide_dma_exec_cmd(ide_drive_t *drive, u8 command)
1615 /* issue cmd to drive */
1616 ide_execute_command(drive, command, &ide_dma_intr, 2*WAIT_CMD, NULL);
1620 * Kick the DMA controller into life after the DMA command has been issued
1624 pmac_ide_dma_start(ide_drive_t *drive)
1626 pmac_ide_hwif_t* pmif = (pmac_ide_hwif_t *)HWIF(drive)->hwif_data;
1627 volatile struct dbdma_regs __iomem *dma;
1629 dma = pmif->dma_regs;
1631 writel((RUN << 16) | RUN, &dma->control);
1632 /* Make sure it gets to the controller right now */
1633 (void)readl(&dma->control);
1637 * After a DMA transfer, make sure the controller is stopped
1640 pmac_ide_dma_end (ide_drive_t *drive)
1642 pmac_ide_hwif_t* pmif = (pmac_ide_hwif_t *)HWIF(drive)->hwif_data;
1643 volatile struct dbdma_regs __iomem *dma;
1648 dma = pmif->dma_regs;
1650 drive->waiting_for_dma = 0;
1651 dstat = readl(&dma->status);
1652 writel(((RUN|WAKE|DEAD) << 16), &dma->control);
1653 pmac_ide_destroy_dmatable(drive);
1654 /* verify good dma status. we don't check for ACTIVE beeing 0. We should...
1655 * in theory, but with ATAPI decices doing buffer underruns, that would
1656 * cause us to disable DMA, which isn't what we want
1658 return (dstat & (RUN|DEAD)) != RUN;
1662 * Check out that the interrupt we got was for us. We can't always know this
1663 * for sure with those Apple interfaces (well, we could on the recent ones but
1664 * that's not implemented yet), on the other hand, we don't have shared interrupts
1665 * so it's not really a problem
1668 pmac_ide_dma_test_irq (ide_drive_t *drive)
1670 pmac_ide_hwif_t* pmif = (pmac_ide_hwif_t *)HWIF(drive)->hwif_data;
1671 volatile struct dbdma_regs __iomem *dma;
1672 unsigned long status, timeout;
1676 dma = pmif->dma_regs;
1678 /* We have to things to deal with here:
1680 * - The dbdma won't stop if the command was started
1681 * but completed with an error without transferring all
1682 * datas. This happens when bad blocks are met during
1683 * a multi-block transfer.
1685 * - The dbdma fifo hasn't yet finished flushing to
1686 * to system memory when the disk interrupt occurs.
1690 /* If ACTIVE is cleared, the STOP command have passed and
1691 * transfer is complete.
1693 status = readl(&dma->status);
1694 if (!(status & ACTIVE))
1696 if (!drive->waiting_for_dma)
1697 printk(KERN_WARNING "ide%d, ide_dma_test_irq \
1698 called while not waiting\n", HWIF(drive)->index);
1700 /* If dbdma didn't execute the STOP command yet, the
1701 * active bit is still set. We consider that we aren't
1702 * sharing interrupts (which is hopefully the case with
1703 * those controllers) and so we just try to flush the
1704 * channel for pending data in the fifo
1707 writel((FLUSH << 16) | FLUSH, &dma->control);
1711 status = readl(&dma->status);
1712 if ((status & FLUSH) == 0)
1714 if (++timeout > 100) {
1715 printk(KERN_WARNING "ide%d, ide_dma_test_irq \
1716 timeout flushing channel\n", HWIF(drive)->index);
1723 static void pmac_ide_dma_host_off(ide_drive_t *drive)
1727 static void pmac_ide_dma_host_on(ide_drive_t *drive)
1732 pmac_ide_dma_lost_irq (ide_drive_t *drive)
1734 pmac_ide_hwif_t* pmif = (pmac_ide_hwif_t *)HWIF(drive)->hwif_data;
1735 volatile struct dbdma_regs __iomem *dma;
1736 unsigned long status;
1740 dma = pmif->dma_regs;
1742 status = readl(&dma->status);
1743 printk(KERN_ERR "ide-pmac lost interrupt, dma status: %lx\n", status);
1747 * Allocate the data structures needed for using DMA with an interface
1748 * and fill the proper list of functions pointers
1751 pmac_ide_setup_dma(pmac_ide_hwif_t *pmif, ide_hwif_t *hwif)
1753 /* We won't need pci_dev if we switch to generic consistent
1756 if (hwif->pci_dev == NULL)
1759 * Allocate space for the DBDMA commands.
1760 * The +2 is +1 for the stop command and +1 to allow for
1761 * aligning the start address to a multiple of 16 bytes.
1763 pmif->dma_table_cpu = (struct dbdma_cmd*)pci_alloc_consistent(
1765 (MAX_DCMDS + 2) * sizeof(struct dbdma_cmd),
1766 &hwif->dmatable_dma);
1767 if (pmif->dma_table_cpu == NULL) {
1768 printk(KERN_ERR "%s: unable to allocate DMA command list\n",
1773 hwif->dma_off_quietly = &ide_dma_off_quietly;
1774 hwif->ide_dma_on = &__ide_dma_on;
1775 hwif->dma_setup = &pmac_ide_dma_setup;
1776 hwif->dma_exec_cmd = &pmac_ide_dma_exec_cmd;
1777 hwif->dma_start = &pmac_ide_dma_start;
1778 hwif->ide_dma_end = &pmac_ide_dma_end;
1779 hwif->ide_dma_test_irq = &pmac_ide_dma_test_irq;
1780 hwif->dma_host_off = &pmac_ide_dma_host_off;
1781 hwif->dma_host_on = &pmac_ide_dma_host_on;
1782 hwif->dma_timeout = &ide_dma_timeout;
1783 hwif->dma_lost_irq = &pmac_ide_dma_lost_irq;
1785 switch(pmif->kind) {
1786 case controller_sh_ata6:
1787 hwif->ultra_mask = pmif->cable_80 ? 0x7f : 0x07;
1788 hwif->mwdma_mask = 0x07;
1789 hwif->swdma_mask = 0x00;
1791 case controller_un_ata6:
1792 case controller_k2_ata6:
1793 hwif->ultra_mask = pmif->cable_80 ? 0x3f : 0x07;
1794 hwif->mwdma_mask = 0x07;
1795 hwif->swdma_mask = 0x00;
1797 case controller_kl_ata4:
1798 hwif->ultra_mask = pmif->cable_80 ? 0x1f : 0x07;
1799 hwif->mwdma_mask = 0x07;
1800 hwif->swdma_mask = 0x00;
1803 hwif->ultra_mask = 0x00;
1804 hwif->mwdma_mask = 0x07;
1805 hwif->swdma_mask = 0x00;
1810 #endif /* CONFIG_BLK_DEV_IDEDMA_PMAC */