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 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/reboot.h>
32 #include <linux/pci.h>
33 #include <linux/adb.h>
34 #include <linux/pmu.h>
35 #include <linux/scatterlist.h>
39 #include <asm/dbdma.h>
41 #include <asm/pci-bridge.h>
42 #include <asm/machdep.h>
43 #include <asm/pmac_feature.h>
44 #include <asm/sections.h>
48 #include <asm/mediabay.h>
51 #include "../ide-timing.h"
55 #define DMA_WAIT_TIMEOUT 50
57 typedef struct pmac_ide_hwif {
58 unsigned long regbase;
62 unsigned cable_80 : 1;
63 unsigned mediabay : 1;
64 unsigned broken_dma : 1;
65 unsigned broken_dma_warn : 1;
66 struct device_node* node;
67 struct macio_dev *mdev;
69 volatile u32 __iomem * *kauai_fcr;
70 #ifdef CONFIG_BLK_DEV_IDEDMA_PMAC
71 /* Those fields are duplicating what is in hwif. We currently
72 * can't use the hwif ones because of some assumptions that are
73 * beeing done by the generic code about the kind of dma controller
74 * and format of the dma table. This will have to be fixed though.
76 volatile struct dbdma_regs __iomem * dma_regs;
77 struct dbdma_cmd* dma_table_cpu;
83 controller_ohare, /* OHare based */
84 controller_heathrow, /* Heathrow/Paddington */
85 controller_kl_ata3, /* KeyLargo ATA-3 */
86 controller_kl_ata4, /* KeyLargo ATA-4 */
87 controller_un_ata6, /* UniNorth2 ATA-6 */
88 controller_k2_ata6, /* K2 ATA-6 */
89 controller_sh_ata6, /* Shasta ATA-6 */
92 static const char* model_name[] = {
93 "OHare ATA", /* OHare based */
94 "Heathrow ATA", /* Heathrow/Paddington */
95 "KeyLargo ATA-3", /* KeyLargo ATA-3 (MDMA only) */
96 "KeyLargo ATA-4", /* KeyLargo ATA-4 (UDMA/66) */
97 "UniNorth ATA-6", /* UniNorth2 ATA-6 (UDMA/100) */
98 "K2 ATA-6", /* K2 ATA-6 (UDMA/100) */
99 "Shasta ATA-6", /* Shasta ATA-6 (UDMA/133) */
103 * Extra registers, both 32-bit little-endian
105 #define IDE_TIMING_CONFIG 0x200
106 #define IDE_INTERRUPT 0x300
108 /* Kauai (U2) ATA has different register setup */
109 #define IDE_KAUAI_PIO_CONFIG 0x200
110 #define IDE_KAUAI_ULTRA_CONFIG 0x210
111 #define IDE_KAUAI_POLL_CONFIG 0x220
114 * Timing configuration register definitions
117 /* Number of IDE_SYSCLK_NS ticks, argument is in nanoseconds */
118 #define SYSCLK_TICKS(t) (((t) + IDE_SYSCLK_NS - 1) / IDE_SYSCLK_NS)
119 #define SYSCLK_TICKS_66(t) (((t) + IDE_SYSCLK_66_NS - 1) / IDE_SYSCLK_66_NS)
120 #define IDE_SYSCLK_NS 30 /* 33Mhz cell */
121 #define IDE_SYSCLK_66_NS 15 /* 66Mhz cell */
123 /* 133Mhz cell, found in shasta.
124 * See comments about 100 Mhz Uninorth 2...
125 * Note that PIO_MASK and MDMA_MASK seem to overlap
127 #define TR_133_PIOREG_PIO_MASK 0xff000fff
128 #define TR_133_PIOREG_MDMA_MASK 0x00fff800
129 #define TR_133_UDMAREG_UDMA_MASK 0x0003ffff
130 #define TR_133_UDMAREG_UDMA_EN 0x00000001
132 /* 100Mhz cell, found in Uninorth 2. I don't have much infos about
133 * this one yet, it appears as a pci device (106b/0033) on uninorth
134 * internal PCI bus and it's clock is controlled like gem or fw. It
135 * appears to be an evolution of keylargo ATA4 with a timing register
136 * extended to 2 32bits registers and a similar DBDMA channel. Other
137 * registers seem to exist but I can't tell much about them.
139 * So far, I'm using pre-calculated tables for this extracted from
140 * the values used by the MacOS X driver.
142 * The "PIO" register controls PIO and MDMA timings, the "ULTRA"
143 * register controls the UDMA timings. At least, it seems bit 0
144 * of this one enables UDMA vs. MDMA, and bits 4..7 are the
145 * cycle time in units of 10ns. Bits 8..15 are used by I don't
146 * know their meaning yet
148 #define TR_100_PIOREG_PIO_MASK 0xff000fff
149 #define TR_100_PIOREG_MDMA_MASK 0x00fff000
150 #define TR_100_UDMAREG_UDMA_MASK 0x0000ffff
151 #define TR_100_UDMAREG_UDMA_EN 0x00000001
154 /* 66Mhz cell, found in KeyLargo. Can do ultra mode 0 to 2 on
155 * 40 connector cable and to 4 on 80 connector one.
156 * Clock unit is 15ns (66Mhz)
158 * 3 Values can be programmed:
159 * - Write data setup, which appears to match the cycle time. They
160 * also call it DIOW setup.
161 * - Ready to pause time (from spec)
162 * - Address setup. That one is weird. I don't see where exactly
163 * it fits in UDMA cycles, I got it's name from an obscure piece
164 * of commented out code in Darwin. They leave it to 0, we do as
165 * well, despite a comment that would lead to think it has a
167 * Apple also add 60ns to the write data setup (or cycle time ?) on
170 #define TR_66_UDMA_MASK 0xfff00000
171 #define TR_66_UDMA_EN 0x00100000 /* Enable Ultra mode for DMA */
172 #define TR_66_UDMA_ADDRSETUP_MASK 0xe0000000 /* Address setup */
173 #define TR_66_UDMA_ADDRSETUP_SHIFT 29
174 #define TR_66_UDMA_RDY2PAUS_MASK 0x1e000000 /* Ready 2 pause time */
175 #define TR_66_UDMA_RDY2PAUS_SHIFT 25
176 #define TR_66_UDMA_WRDATASETUP_MASK 0x01e00000 /* Write data setup time */
177 #define TR_66_UDMA_WRDATASETUP_SHIFT 21
178 #define TR_66_MDMA_MASK 0x000ffc00
179 #define TR_66_MDMA_RECOVERY_MASK 0x000f8000
180 #define TR_66_MDMA_RECOVERY_SHIFT 15
181 #define TR_66_MDMA_ACCESS_MASK 0x00007c00
182 #define TR_66_MDMA_ACCESS_SHIFT 10
183 #define TR_66_PIO_MASK 0x000003ff
184 #define TR_66_PIO_RECOVERY_MASK 0x000003e0
185 #define TR_66_PIO_RECOVERY_SHIFT 5
186 #define TR_66_PIO_ACCESS_MASK 0x0000001f
187 #define TR_66_PIO_ACCESS_SHIFT 0
189 /* 33Mhz cell, found in OHare, Heathrow (& Paddington) and KeyLargo
190 * Can do pio & mdma modes, clock unit is 30ns (33Mhz)
192 * The access time and recovery time can be programmed. Some older
193 * Darwin code base limit OHare to 150ns cycle time. I decided to do
194 * the same here fore safety against broken old hardware ;)
195 * The HalfTick bit, when set, adds half a clock (15ns) to the access
196 * time and removes one from recovery. It's not supported on KeyLargo
197 * implementation afaik. The E bit appears to be set for PIO mode 0 and
198 * is used to reach long timings used in this mode.
200 #define TR_33_MDMA_MASK 0x003ff800
201 #define TR_33_MDMA_RECOVERY_MASK 0x001f0000
202 #define TR_33_MDMA_RECOVERY_SHIFT 16
203 #define TR_33_MDMA_ACCESS_MASK 0x0000f800
204 #define TR_33_MDMA_ACCESS_SHIFT 11
205 #define TR_33_MDMA_HALFTICK 0x00200000
206 #define TR_33_PIO_MASK 0x000007ff
207 #define TR_33_PIO_E 0x00000400
208 #define TR_33_PIO_RECOVERY_MASK 0x000003e0
209 #define TR_33_PIO_RECOVERY_SHIFT 5
210 #define TR_33_PIO_ACCESS_MASK 0x0000001f
211 #define TR_33_PIO_ACCESS_SHIFT 0
214 * Interrupt register definitions
216 #define IDE_INTR_DMA 0x80000000
217 #define IDE_INTR_DEVICE 0x40000000
220 * FCR Register on Kauai. Not sure what bit 0x4 is ...
222 #define KAUAI_FCR_UATA_MAGIC 0x00000004
223 #define KAUAI_FCR_UATA_RESET_N 0x00000002
224 #define KAUAI_FCR_UATA_ENABLE 0x00000001
226 #ifdef CONFIG_BLK_DEV_IDEDMA_PMAC
228 /* Rounded Multiword DMA timings
230 * I gave up finding a generic formula for all controller
231 * types and instead, built tables based on timing values
232 * used by Apple in Darwin's implementation.
234 struct mdma_timings_t {
240 struct mdma_timings_t mdma_timings_33[] =
253 struct mdma_timings_t mdma_timings_33k[] =
266 struct mdma_timings_t mdma_timings_66[] =
279 /* KeyLargo ATA-4 Ultra DMA timings (rounded) */
281 int addrSetup; /* ??? */
284 } kl66_udma_timings[] =
286 { 0, 180, 120 }, /* Mode 0 */
287 { 0, 150, 90 }, /* 1 */
288 { 0, 120, 60 }, /* 2 */
289 { 0, 90, 45 }, /* 3 */
290 { 0, 90, 30 } /* 4 */
293 /* UniNorth 2 ATA/100 timings */
294 struct kauai_timing {
299 static struct kauai_timing kauai_pio_timings[] =
301 { 930 , 0x08000fff },
302 { 600 , 0x08000a92 },
303 { 383 , 0x0800060f },
304 { 360 , 0x08000492 },
305 { 330 , 0x0800048f },
306 { 300 , 0x080003cf },
307 { 270 , 0x080003cc },
308 { 240 , 0x0800038b },
309 { 239 , 0x0800030c },
310 { 180 , 0x05000249 },
311 { 120 , 0x04000148 },
315 static struct kauai_timing kauai_mdma_timings[] =
317 { 1260 , 0x00fff000 },
318 { 480 , 0x00618000 },
319 { 360 , 0x00492000 },
320 { 270 , 0x0038e000 },
321 { 240 , 0x0030c000 },
322 { 210 , 0x002cb000 },
323 { 180 , 0x00249000 },
324 { 150 , 0x00209000 },
325 { 120 , 0x00148000 },
329 static struct kauai_timing kauai_udma_timings[] =
331 { 120 , 0x000070c0 },
340 static struct kauai_timing shasta_pio_timings[] =
342 { 930 , 0x08000fff },
343 { 600 , 0x0A000c97 },
344 { 383 , 0x07000712 },
345 { 360 , 0x040003cd },
346 { 330 , 0x040003cd },
347 { 300 , 0x040003cd },
348 { 270 , 0x040003cd },
349 { 240 , 0x040003cd },
350 { 239 , 0x040003cd },
351 { 180 , 0x0400028b },
352 { 120 , 0x0400010a },
356 static struct kauai_timing shasta_mdma_timings[] =
358 { 1260 , 0x00fff000 },
359 { 480 , 0x00820800 },
360 { 360 , 0x00820800 },
361 { 270 , 0x00820800 },
362 { 240 , 0x00820800 },
363 { 210 , 0x00820800 },
364 { 180 , 0x00820800 },
365 { 150 , 0x0028b000 },
366 { 120 , 0x001ca000 },
370 static struct kauai_timing shasta_udma133_timings[] =
372 { 120 , 0x00035901, },
373 { 90 , 0x000348b1, },
374 { 60 , 0x00033881, },
375 { 45 , 0x00033861, },
376 { 30 , 0x00033841, },
377 { 20 , 0x00033031, },
378 { 15 , 0x00033021, },
384 kauai_lookup_timing(struct kauai_timing* table, int cycle_time)
388 for (i=0; table[i].cycle_time; i++)
389 if (cycle_time > table[i+1].cycle_time)
390 return table[i].timing_reg;
395 /* allow up to 256 DBDMA commands per xfer */
396 #define MAX_DCMDS 256
399 * Wait 1s for disk to answer on IDE bus after a hard reset
400 * of the device (via GPIO/FCR).
402 * Some devices seem to "pollute" the bus even after dropping
403 * the BSY bit (typically some combo drives slave on the UDMA
404 * bus) after a hard reset. Since we hard reset all drives on
405 * KeyLargo ATA66, we have to keep that delay around. I may end
406 * up not hard resetting anymore on these and keep the delay only
407 * for older interfaces instead (we have to reset when coming
408 * from MacOS...) --BenH.
410 #define IDE_WAKEUP_DELAY (1*HZ)
412 static int pmac_ide_init_dma(ide_hwif_t *, const struct ide_port_info *);
413 static int pmac_ide_build_dmatable(ide_drive_t *drive, struct request *rq);
414 static void pmac_ide_selectproc(ide_drive_t *drive);
415 static void pmac_ide_kauai_selectproc(ide_drive_t *drive);
417 #endif /* CONFIG_BLK_DEV_IDEDMA_PMAC */
419 #define PMAC_IDE_REG(x) \
420 ((void __iomem *)((drive)->hwif->io_ports.data_addr + (x)))
423 * Apply the timings of the proper unit (master/slave) to the shared
424 * timing register when selecting that unit. This version is for
425 * ASICs with a single timing register
428 pmac_ide_selectproc(ide_drive_t *drive)
430 pmac_ide_hwif_t* pmif = (pmac_ide_hwif_t *)HWIF(drive)->hwif_data;
435 if (drive->select.b.unit & 0x01)
436 writel(pmif->timings[1], PMAC_IDE_REG(IDE_TIMING_CONFIG));
438 writel(pmif->timings[0], PMAC_IDE_REG(IDE_TIMING_CONFIG));
439 (void)readl(PMAC_IDE_REG(IDE_TIMING_CONFIG));
443 * Apply the timings of the proper unit (master/slave) to the shared
444 * timing register when selecting that unit. This version is for
445 * ASICs with a dual timing register (Kauai)
448 pmac_ide_kauai_selectproc(ide_drive_t *drive)
450 pmac_ide_hwif_t* pmif = (pmac_ide_hwif_t *)HWIF(drive)->hwif_data;
455 if (drive->select.b.unit & 0x01) {
456 writel(pmif->timings[1], PMAC_IDE_REG(IDE_KAUAI_PIO_CONFIG));
457 writel(pmif->timings[3], PMAC_IDE_REG(IDE_KAUAI_ULTRA_CONFIG));
459 writel(pmif->timings[0], PMAC_IDE_REG(IDE_KAUAI_PIO_CONFIG));
460 writel(pmif->timings[2], PMAC_IDE_REG(IDE_KAUAI_ULTRA_CONFIG));
462 (void)readl(PMAC_IDE_REG(IDE_KAUAI_PIO_CONFIG));
466 * Force an update of controller timing values for a given drive
469 pmac_ide_do_update_timings(ide_drive_t *drive)
471 pmac_ide_hwif_t* pmif = (pmac_ide_hwif_t *)HWIF(drive)->hwif_data;
476 if (pmif->kind == controller_sh_ata6 ||
477 pmif->kind == controller_un_ata6 ||
478 pmif->kind == controller_k2_ata6)
479 pmac_ide_kauai_selectproc(drive);
481 pmac_ide_selectproc(drive);
485 pmac_outbsync(ide_drive_t *drive, u8 value, unsigned long port)
489 writeb(value, (void __iomem *) port);
490 tmp = readl(PMAC_IDE_REG(IDE_TIMING_CONFIG));
494 * Old tuning functions (called on hdparm -p), sets up drive PIO timings
497 pmac_ide_set_pio_mode(ide_drive_t *drive, const u8 pio)
500 unsigned accessTicks, recTicks;
501 unsigned accessTime, recTime;
502 pmac_ide_hwif_t* pmif = (pmac_ide_hwif_t *)HWIF(drive)->hwif_data;
503 unsigned int cycle_time;
508 /* which drive is it ? */
509 timings = &pmif->timings[drive->select.b.unit & 0x01];
512 cycle_time = ide_pio_cycle_time(drive, pio);
514 switch (pmif->kind) {
515 case controller_sh_ata6: {
517 u32 tr = kauai_lookup_timing(shasta_pio_timings, cycle_time);
518 t = (t & ~TR_133_PIOREG_PIO_MASK) | tr;
521 case controller_un_ata6:
522 case controller_k2_ata6: {
524 u32 tr = kauai_lookup_timing(kauai_pio_timings, cycle_time);
525 t = (t & ~TR_100_PIOREG_PIO_MASK) | tr;
528 case controller_kl_ata4:
530 recTime = cycle_time - ide_pio_timings[pio].active_time
531 - ide_pio_timings[pio].setup_time;
532 recTime = max(recTime, 150U);
533 accessTime = ide_pio_timings[pio].active_time;
534 accessTime = max(accessTime, 150U);
535 accessTicks = SYSCLK_TICKS_66(accessTime);
536 accessTicks = min(accessTicks, 0x1fU);
537 recTicks = SYSCLK_TICKS_66(recTime);
538 recTicks = min(recTicks, 0x1fU);
539 t = (t & ~TR_66_PIO_MASK) |
540 (accessTicks << TR_66_PIO_ACCESS_SHIFT) |
541 (recTicks << TR_66_PIO_RECOVERY_SHIFT);
546 recTime = cycle_time - ide_pio_timings[pio].active_time
547 - ide_pio_timings[pio].setup_time;
548 recTime = max(recTime, 150U);
549 accessTime = ide_pio_timings[pio].active_time;
550 accessTime = max(accessTime, 150U);
551 accessTicks = SYSCLK_TICKS(accessTime);
552 accessTicks = min(accessTicks, 0x1fU);
553 accessTicks = max(accessTicks, 4U);
554 recTicks = SYSCLK_TICKS(recTime);
555 recTicks = min(recTicks, 0x1fU);
556 recTicks = max(recTicks, 5U) - 4;
558 recTicks--; /* guess, but it's only for PIO0, so... */
561 t = (t & ~TR_33_PIO_MASK) |
562 (accessTicks << TR_33_PIO_ACCESS_SHIFT) |
563 (recTicks << TR_33_PIO_RECOVERY_SHIFT);
570 #ifdef IDE_PMAC_DEBUG
571 printk(KERN_ERR "%s: Set PIO timing for mode %d, reg: 0x%08x\n",
572 drive->name, pio, *timings);
576 pmac_ide_do_update_timings(drive);
579 #ifdef CONFIG_BLK_DEV_IDEDMA_PMAC
582 * Calculate KeyLargo ATA/66 UDMA timings
585 set_timings_udma_ata4(u32 *timings, u8 speed)
587 unsigned rdyToPauseTicks, wrDataSetupTicks, addrTicks;
589 if (speed > XFER_UDMA_4)
592 rdyToPauseTicks = SYSCLK_TICKS_66(kl66_udma_timings[speed & 0xf].rdy2pause);
593 wrDataSetupTicks = SYSCLK_TICKS_66(kl66_udma_timings[speed & 0xf].wrDataSetup);
594 addrTicks = SYSCLK_TICKS_66(kl66_udma_timings[speed & 0xf].addrSetup);
596 *timings = ((*timings) & ~(TR_66_UDMA_MASK | TR_66_MDMA_MASK)) |
597 (wrDataSetupTicks << TR_66_UDMA_WRDATASETUP_SHIFT) |
598 (rdyToPauseTicks << TR_66_UDMA_RDY2PAUS_SHIFT) |
599 (addrTicks <<TR_66_UDMA_ADDRSETUP_SHIFT) |
601 #ifdef IDE_PMAC_DEBUG
602 printk(KERN_ERR "ide_pmac: Set UDMA timing for mode %d, reg: 0x%08x\n",
603 speed & 0xf, *timings);
610 * Calculate Kauai ATA/100 UDMA timings
613 set_timings_udma_ata6(u32 *pio_timings, u32 *ultra_timings, u8 speed)
615 struct ide_timing *t = ide_timing_find_mode(speed);
618 if (speed > XFER_UDMA_5 || t == NULL)
620 tr = kauai_lookup_timing(kauai_udma_timings, (int)t->udma);
621 *ultra_timings = ((*ultra_timings) & ~TR_100_UDMAREG_UDMA_MASK) | tr;
622 *ultra_timings = (*ultra_timings) | TR_100_UDMAREG_UDMA_EN;
628 * Calculate Shasta ATA/133 UDMA timings
631 set_timings_udma_shasta(u32 *pio_timings, u32 *ultra_timings, u8 speed)
633 struct ide_timing *t = ide_timing_find_mode(speed);
636 if (speed > XFER_UDMA_6 || t == NULL)
638 tr = kauai_lookup_timing(shasta_udma133_timings, (int)t->udma);
639 *ultra_timings = ((*ultra_timings) & ~TR_133_UDMAREG_UDMA_MASK) | tr;
640 *ultra_timings = (*ultra_timings) | TR_133_UDMAREG_UDMA_EN;
646 * Calculate MDMA timings for all cells
649 set_timings_mdma(ide_drive_t *drive, int intf_type, u32 *timings, u32 *timings2,
652 int cycleTime, accessTime = 0, recTime = 0;
653 unsigned accessTicks, recTicks;
654 struct hd_driveid *id = drive->id;
655 struct mdma_timings_t* tm = NULL;
658 /* Get default cycle time for mode */
659 switch(speed & 0xf) {
660 case 0: cycleTime = 480; break;
661 case 1: cycleTime = 150; break;
662 case 2: cycleTime = 120; break;
668 /* Check if drive provides explicit DMA cycle time */
669 if ((id->field_valid & 2) && id->eide_dma_time)
670 cycleTime = max_t(int, id->eide_dma_time, cycleTime);
672 /* OHare limits according to some old Apple sources */
673 if ((intf_type == controller_ohare) && (cycleTime < 150))
675 /* Get the proper timing array for this controller */
677 case controller_sh_ata6:
678 case controller_un_ata6:
679 case controller_k2_ata6:
681 case controller_kl_ata4:
682 tm = mdma_timings_66;
684 case controller_kl_ata3:
685 tm = mdma_timings_33k;
688 tm = mdma_timings_33;
692 /* Lookup matching access & recovery times */
695 if (tm[i+1].cycleTime < cycleTime)
699 cycleTime = tm[i].cycleTime;
700 accessTime = tm[i].accessTime;
701 recTime = tm[i].recoveryTime;
703 #ifdef IDE_PMAC_DEBUG
704 printk(KERN_ERR "%s: MDMA, cycleTime: %d, accessTime: %d, recTime: %d\n",
705 drive->name, cycleTime, accessTime, recTime);
709 case controller_sh_ata6: {
711 u32 tr = kauai_lookup_timing(shasta_mdma_timings, cycleTime);
712 *timings = ((*timings) & ~TR_133_PIOREG_MDMA_MASK) | tr;
713 *timings2 = (*timings2) & ~TR_133_UDMAREG_UDMA_EN;
715 case controller_un_ata6:
716 case controller_k2_ata6: {
718 u32 tr = kauai_lookup_timing(kauai_mdma_timings, cycleTime);
719 *timings = ((*timings) & ~TR_100_PIOREG_MDMA_MASK) | tr;
720 *timings2 = (*timings2) & ~TR_100_UDMAREG_UDMA_EN;
723 case controller_kl_ata4:
725 accessTicks = SYSCLK_TICKS_66(accessTime);
726 accessTicks = min(accessTicks, 0x1fU);
727 accessTicks = max(accessTicks, 0x1U);
728 recTicks = SYSCLK_TICKS_66(recTime);
729 recTicks = min(recTicks, 0x1fU);
730 recTicks = max(recTicks, 0x3U);
731 /* Clear out mdma bits and disable udma */
732 *timings = ((*timings) & ~(TR_66_MDMA_MASK | TR_66_UDMA_MASK)) |
733 (accessTicks << TR_66_MDMA_ACCESS_SHIFT) |
734 (recTicks << TR_66_MDMA_RECOVERY_SHIFT);
736 case controller_kl_ata3:
737 /* 33Mhz cell on KeyLargo */
738 accessTicks = SYSCLK_TICKS(accessTime);
739 accessTicks = max(accessTicks, 1U);
740 accessTicks = min(accessTicks, 0x1fU);
741 accessTime = accessTicks * IDE_SYSCLK_NS;
742 recTicks = SYSCLK_TICKS(recTime);
743 recTicks = max(recTicks, 1U);
744 recTicks = min(recTicks, 0x1fU);
745 *timings = ((*timings) & ~TR_33_MDMA_MASK) |
746 (accessTicks << TR_33_MDMA_ACCESS_SHIFT) |
747 (recTicks << TR_33_MDMA_RECOVERY_SHIFT);
750 /* 33Mhz cell on others */
752 int origAccessTime = accessTime;
753 int origRecTime = recTime;
755 accessTicks = SYSCLK_TICKS(accessTime);
756 accessTicks = max(accessTicks, 1U);
757 accessTicks = min(accessTicks, 0x1fU);
758 accessTime = accessTicks * IDE_SYSCLK_NS;
759 recTicks = SYSCLK_TICKS(recTime);
760 recTicks = max(recTicks, 2U) - 1;
761 recTicks = min(recTicks, 0x1fU);
762 recTime = (recTicks + 1) * IDE_SYSCLK_NS;
763 if ((accessTicks > 1) &&
764 ((accessTime - IDE_SYSCLK_NS/2) >= origAccessTime) &&
765 ((recTime - IDE_SYSCLK_NS/2) >= origRecTime)) {
769 *timings = ((*timings) & ~TR_33_MDMA_MASK) |
770 (accessTicks << TR_33_MDMA_ACCESS_SHIFT) |
771 (recTicks << TR_33_MDMA_RECOVERY_SHIFT);
773 *timings |= TR_33_MDMA_HALFTICK;
776 #ifdef IDE_PMAC_DEBUG
777 printk(KERN_ERR "%s: Set MDMA timing for mode %d, reg: 0x%08x\n",
778 drive->name, speed & 0xf, *timings);
781 #endif /* #ifdef CONFIG_BLK_DEV_IDEDMA_PMAC */
783 static void pmac_ide_set_dma_mode(ide_drive_t *drive, const u8 speed)
785 int unit = (drive->select.b.unit & 0x01);
787 pmac_ide_hwif_t* pmif = (pmac_ide_hwif_t *)HWIF(drive)->hwif_data;
788 u32 *timings, *timings2, tl[2];
790 timings = &pmif->timings[unit];
791 timings2 = &pmif->timings[unit+2];
793 /* Copy timings to local image */
797 #ifdef CONFIG_BLK_DEV_IDEDMA_PMAC
798 if (speed >= XFER_UDMA_0) {
799 if (pmif->kind == controller_kl_ata4)
800 ret = set_timings_udma_ata4(&tl[0], speed);
801 else if (pmif->kind == controller_un_ata6
802 || pmif->kind == controller_k2_ata6)
803 ret = set_timings_udma_ata6(&tl[0], &tl[1], speed);
804 else if (pmif->kind == controller_sh_ata6)
805 ret = set_timings_udma_shasta(&tl[0], &tl[1], speed);
809 set_timings_mdma(drive, pmif->kind, &tl[0], &tl[1], speed);
810 #endif /* CONFIG_BLK_DEV_IDEDMA_PMAC */
814 /* Apply timings to controller */
818 pmac_ide_do_update_timings(drive);
822 * Blast some well known "safe" values to the timing registers at init or
823 * wakeup from sleep time, before we do real calculation
826 sanitize_timings(pmac_ide_hwif_t *pmif)
828 unsigned int value, value2 = 0;
831 case controller_sh_ata6:
835 case controller_un_ata6:
836 case controller_k2_ata6:
840 case controller_kl_ata4:
843 case controller_kl_ata3:
846 case controller_heathrow:
847 case controller_ohare:
852 pmif->timings[0] = pmif->timings[1] = value;
853 pmif->timings[2] = pmif->timings[3] = value2;
856 /* Suspend call back, should be called after the child devices
857 * have actually been suspended
860 pmac_ide_do_suspend(ide_hwif_t *hwif)
862 pmac_ide_hwif_t *pmif = (pmac_ide_hwif_t *)hwif->hwif_data;
864 /* We clear the timings */
865 pmif->timings[0] = 0;
866 pmif->timings[1] = 0;
868 disable_irq(pmif->irq);
870 /* The media bay will handle itself just fine */
874 /* Kauai has bus control FCRs directly here */
875 if (pmif->kauai_fcr) {
876 u32 fcr = readl(pmif->kauai_fcr);
877 fcr &= ~(KAUAI_FCR_UATA_RESET_N | KAUAI_FCR_UATA_ENABLE);
878 writel(fcr, pmif->kauai_fcr);
881 /* Disable the bus on older machines and the cell on kauai */
882 ppc_md.feature_call(PMAC_FTR_IDE_ENABLE, pmif->node, pmif->aapl_bus_id,
888 /* Resume call back, should be called before the child devices
892 pmac_ide_do_resume(ide_hwif_t *hwif)
894 pmac_ide_hwif_t *pmif = (pmac_ide_hwif_t *)hwif->hwif_data;
896 /* Hard reset & re-enable controller (do we really need to reset ? -BenH) */
897 if (!pmif->mediabay) {
898 ppc_md.feature_call(PMAC_FTR_IDE_RESET, pmif->node, pmif->aapl_bus_id, 1);
899 ppc_md.feature_call(PMAC_FTR_IDE_ENABLE, pmif->node, pmif->aapl_bus_id, 1);
901 ppc_md.feature_call(PMAC_FTR_IDE_RESET, pmif->node, pmif->aapl_bus_id, 0);
903 /* Kauai has it different */
904 if (pmif->kauai_fcr) {
905 u32 fcr = readl(pmif->kauai_fcr);
906 fcr |= KAUAI_FCR_UATA_RESET_N | KAUAI_FCR_UATA_ENABLE;
907 writel(fcr, pmif->kauai_fcr);
910 msleep(jiffies_to_msecs(IDE_WAKEUP_DELAY));
913 /* Sanitize drive timings */
914 sanitize_timings(pmif);
916 enable_irq(pmif->irq);
921 static const struct ide_port_ops pmac_ide_ata6_port_ops = {
922 .set_pio_mode = pmac_ide_set_pio_mode,
923 .set_dma_mode = pmac_ide_set_dma_mode,
924 .selectproc = pmac_ide_kauai_selectproc,
927 static const struct ide_port_ops pmac_ide_port_ops = {
928 .set_pio_mode = pmac_ide_set_pio_mode,
929 .set_dma_mode = pmac_ide_set_dma_mode,
930 .selectproc = pmac_ide_selectproc,
933 static const struct ide_dma_ops pmac_dma_ops;
935 static const struct ide_port_info pmac_port_info = {
936 .init_dma = pmac_ide_init_dma,
938 #ifdef CONFIG_BLK_DEV_IDEDMA_PMAC
939 .dma_ops = &pmac_dma_ops,
941 .port_ops = &pmac_ide_port_ops,
942 .host_flags = IDE_HFLAG_SET_PIO_MODE_KEEP_DMA |
943 IDE_HFLAG_POST_SET_MODE |
945 IDE_HFLAG_UNMASK_IRQS,
946 .pio_mask = ATA_PIO4,
947 .mwdma_mask = ATA_MWDMA2,
951 * Setup, register & probe an IDE channel driven by this driver, this is
952 * called by one of the 2 probe functions (macio or PCI). Note that a channel
953 * that ends up beeing free of any device is not kept around by this driver
954 * (it is kept in 2.4). This introduce an interface numbering change on some
955 * rare machines unfortunately, but it's better this way.
958 pmac_ide_setup_device(pmac_ide_hwif_t *pmif, ide_hwif_t *hwif, hw_regs_t *hw)
960 struct device_node *np = pmif->node;
962 u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
963 struct ide_port_info d = pmac_port_info;
966 pmif->broken_dma = pmif->broken_dma_warn = 0;
967 if (of_device_is_compatible(np, "shasta-ata")) {
968 pmif->kind = controller_sh_ata6;
969 d.port_ops = &pmac_ide_ata6_port_ops;
970 d.udma_mask = ATA_UDMA6;
971 } else if (of_device_is_compatible(np, "kauai-ata")) {
972 pmif->kind = controller_un_ata6;
973 d.port_ops = &pmac_ide_ata6_port_ops;
974 d.udma_mask = ATA_UDMA5;
975 } else if (of_device_is_compatible(np, "K2-UATA")) {
976 pmif->kind = controller_k2_ata6;
977 d.port_ops = &pmac_ide_ata6_port_ops;
978 d.udma_mask = ATA_UDMA5;
979 } else if (of_device_is_compatible(np, "keylargo-ata")) {
980 if (strcmp(np->name, "ata-4") == 0) {
981 pmif->kind = controller_kl_ata4;
982 d.udma_mask = ATA_UDMA4;
984 pmif->kind = controller_kl_ata3;
985 } else if (of_device_is_compatible(np, "heathrow-ata")) {
986 pmif->kind = controller_heathrow;
988 pmif->kind = controller_ohare;
989 pmif->broken_dma = 1;
992 bidp = of_get_property(np, "AAPL,bus-id", NULL);
993 pmif->aapl_bus_id = bidp ? *bidp : 0;
995 /* Get cable type from device-tree */
996 if (pmif->kind == controller_kl_ata4 || pmif->kind == controller_un_ata6
997 || pmif->kind == controller_k2_ata6
998 || pmif->kind == controller_sh_ata6) {
999 const char* cable = of_get_property(np, "cable-type", NULL);
1000 if (cable && !strncmp(cable, "80-", 3))
1003 /* G5's seem to have incorrect cable type in device-tree. Let's assume
1004 * they have a 80 conductor cable, this seem to be always the case unless
1005 * the user mucked around
1007 if (of_device_is_compatible(np, "K2-UATA") ||
1008 of_device_is_compatible(np, "shasta-ata"))
1011 /* On Kauai-type controllers, we make sure the FCR is correct */
1012 if (pmif->kauai_fcr)
1013 writel(KAUAI_FCR_UATA_MAGIC |
1014 KAUAI_FCR_UATA_RESET_N |
1015 KAUAI_FCR_UATA_ENABLE, pmif->kauai_fcr);
1019 /* Make sure we have sane timings */
1020 sanitize_timings(pmif);
1022 #ifndef CONFIG_PPC64
1023 /* XXX FIXME: Media bay stuff need re-organizing */
1024 if (np->parent && np->parent->name
1025 && strcasecmp(np->parent->name, "media-bay") == 0) {
1026 #ifdef CONFIG_PMAC_MEDIABAY
1027 media_bay_set_ide_infos(np->parent, pmif->regbase, pmif->irq,
1029 #endif /* CONFIG_PMAC_MEDIABAY */
1032 pmif->aapl_bus_id = 1;
1033 } else if (pmif->kind == controller_ohare) {
1034 /* The code below is having trouble on some ohare machines
1035 * (timing related ?). Until I can put my hand on one of these
1036 * units, I keep the old way
1038 ppc_md.feature_call(PMAC_FTR_IDE_ENABLE, np, 0, 1);
1042 /* This is necessary to enable IDE when net-booting */
1043 ppc_md.feature_call(PMAC_FTR_IDE_RESET, np, pmif->aapl_bus_id, 1);
1044 ppc_md.feature_call(PMAC_FTR_IDE_ENABLE, np, pmif->aapl_bus_id, 1);
1046 ppc_md.feature_call(PMAC_FTR_IDE_RESET, np, pmif->aapl_bus_id, 0);
1047 msleep(jiffies_to_msecs(IDE_WAKEUP_DELAY));
1050 /* Setup MMIO ops */
1051 default_hwif_mmiops(hwif);
1052 hwif->OUTBSYNC = pmac_outbsync;
1054 hwif->hwif_data = pmif;
1055 ide_init_port_hw(hwif, hw);
1056 hwif->cbl = pmif->cable_80 ? ATA_CBL_PATA80 : ATA_CBL_PATA40;
1058 printk(KERN_INFO "ide%d: Found Apple %s controller, bus ID %d%s, irq %d\n",
1059 hwif->index, model_name[pmif->kind], pmif->aapl_bus_id,
1060 pmif->mediabay ? " (mediabay)" : "", hwif->irq);
1062 if (pmif->mediabay) {
1063 #ifdef CONFIG_PMAC_MEDIABAY
1064 if (check_media_bay_by_base(pmif->regbase, MB_CD)) {
1068 hwif->drives[0].noprobe = 1;
1069 hwif->drives[1].noprobe = 1;
1073 #ifdef CONFIG_BLK_DEV_IDEDMA_PMAC
1074 if (pmif->cable_80 == 0)
1075 d.udma_mask &= ATA_UDMA2;
1078 idx[0] = hwif->index;
1080 ide_device_add(idx, &d);
1085 static void __devinit pmac_ide_init_ports(hw_regs_t *hw, unsigned long base)
1089 for (i = 0; i < 8; ++i)
1090 hw->io_ports_array[i] = base + i * 0x10;
1092 hw->io_ports.ctl_addr = base + 0x160;
1096 * Attach to a macio probed interface
1098 static int __devinit
1099 pmac_ide_macio_attach(struct macio_dev *mdev, const struct of_device_id *match)
1102 unsigned long regbase;
1104 pmac_ide_hwif_t *pmif;
1108 pmif = kzalloc(sizeof(*pmif), GFP_KERNEL);
1112 hwif = ide_find_port();
1114 printk(KERN_ERR "ide-pmac: MacIO interface attach with no slot\n");
1115 printk(KERN_ERR " %s\n", mdev->ofdev.node->full_name);
1120 if (macio_resource_count(mdev) == 0) {
1121 printk(KERN_WARNING "ide-pmac: no address for %s\n",
1122 mdev->ofdev.node->full_name);
1127 /* Request memory resource for IO ports */
1128 if (macio_request_resource(mdev, 0, "ide-pmac (ports)")) {
1129 printk(KERN_ERR "ide-pmac: can't request MMIO resource for "
1130 "%s!\n", mdev->ofdev.node->full_name);
1135 /* XXX This is bogus. Should be fixed in the registry by checking
1136 * the kind of host interrupt controller, a bit like gatwick
1137 * fixes in irq.c. That works well enough for the single case
1138 * where that happens though...
1140 if (macio_irq_count(mdev) == 0) {
1141 printk(KERN_WARNING "ide-pmac: no intrs for device %s, using "
1142 "13\n", mdev->ofdev.node->full_name);
1143 irq = irq_create_mapping(NULL, 13);
1145 irq = macio_irq(mdev, 0);
1147 base = ioremap(macio_resource_start(mdev, 0), 0x400);
1148 regbase = (unsigned long) base;
1150 hwif->dev = &mdev->bus->pdev->dev;
1153 pmif->node = mdev->ofdev.node;
1154 pmif->regbase = regbase;
1156 pmif->kauai_fcr = NULL;
1157 #ifdef CONFIG_BLK_DEV_IDEDMA_PMAC
1158 if (macio_resource_count(mdev) >= 2) {
1159 if (macio_request_resource(mdev, 1, "ide-pmac (dma)"))
1160 printk(KERN_WARNING "ide-pmac: can't request DMA "
1161 "resource for %s!\n",
1162 mdev->ofdev.node->full_name);
1164 pmif->dma_regs = ioremap(macio_resource_start(mdev, 1), 0x1000);
1166 pmif->dma_regs = NULL;
1167 #endif /* CONFIG_BLK_DEV_IDEDMA_PMAC */
1168 dev_set_drvdata(&mdev->ofdev.dev, hwif);
1170 memset(&hw, 0, sizeof(hw));
1171 pmac_ide_init_ports(&hw, pmif->regbase);
1173 hw.dev = &mdev->ofdev.dev;
1175 rc = pmac_ide_setup_device(pmif, hwif, &hw);
1177 /* The inteface is released to the common IDE layer */
1178 dev_set_drvdata(&mdev->ofdev.dev, NULL);
1180 if (pmif->dma_regs) {
1181 iounmap(pmif->dma_regs);
1182 macio_release_resource(mdev, 1);
1184 macio_release_resource(mdev, 0);
1196 pmac_ide_macio_suspend(struct macio_dev *mdev, pm_message_t mesg)
1198 ide_hwif_t *hwif = (ide_hwif_t *)dev_get_drvdata(&mdev->ofdev.dev);
1201 if (mesg.event != mdev->ofdev.dev.power.power_state.event
1202 && (mesg.event & PM_EVENT_SLEEP)) {
1203 rc = pmac_ide_do_suspend(hwif);
1205 mdev->ofdev.dev.power.power_state = mesg;
1212 pmac_ide_macio_resume(struct macio_dev *mdev)
1214 ide_hwif_t *hwif = (ide_hwif_t *)dev_get_drvdata(&mdev->ofdev.dev);
1217 if (mdev->ofdev.dev.power.power_state.event != PM_EVENT_ON) {
1218 rc = pmac_ide_do_resume(hwif);
1220 mdev->ofdev.dev.power.power_state = PMSG_ON;
1227 * Attach to a PCI probed interface
1229 static int __devinit
1230 pmac_ide_pci_attach(struct pci_dev *pdev, const struct pci_device_id *id)
1233 struct device_node *np;
1234 pmac_ide_hwif_t *pmif;
1236 unsigned long rbase, rlen;
1240 np = pci_device_to_OF_node(pdev);
1242 printk(KERN_ERR "ide-pmac: cannot find MacIO node for Kauai ATA interface\n");
1246 pmif = kzalloc(sizeof(*pmif), GFP_KERNEL);
1250 hwif = ide_find_port();
1252 printk(KERN_ERR "ide-pmac: PCI interface attach with no slot\n");
1253 printk(KERN_ERR " %s\n", np->full_name);
1258 if (pci_enable_device(pdev)) {
1259 printk(KERN_WARNING "ide-pmac: Can't enable PCI device for "
1260 "%s\n", np->full_name);
1264 pci_set_master(pdev);
1266 if (pci_request_regions(pdev, "Kauai ATA")) {
1267 printk(KERN_ERR "ide-pmac: Cannot obtain PCI resources for "
1268 "%s\n", np->full_name);
1273 hwif->dev = &pdev->dev;
1277 rbase = pci_resource_start(pdev, 0);
1278 rlen = pci_resource_len(pdev, 0);
1280 base = ioremap(rbase, rlen);
1281 pmif->regbase = (unsigned long) base + 0x2000;
1282 #ifdef CONFIG_BLK_DEV_IDEDMA_PMAC
1283 pmif->dma_regs = base + 0x1000;
1284 #endif /* CONFIG_BLK_DEV_IDEDMA_PMAC */
1285 pmif->kauai_fcr = base;
1286 pmif->irq = pdev->irq;
1288 pci_set_drvdata(pdev, hwif);
1290 memset(&hw, 0, sizeof(hw));
1291 pmac_ide_init_ports(&hw, pmif->regbase);
1293 hw.dev = &pdev->dev;
1295 rc = pmac_ide_setup_device(pmif, hwif, &hw);
1297 /* The inteface is released to the common IDE layer */
1298 pci_set_drvdata(pdev, NULL);
1300 pci_release_regions(pdev);
1312 pmac_ide_pci_suspend(struct pci_dev *pdev, pm_message_t mesg)
1314 ide_hwif_t *hwif = (ide_hwif_t *)pci_get_drvdata(pdev);
1317 if (mesg.event != pdev->dev.power.power_state.event
1318 && (mesg.event & PM_EVENT_SLEEP)) {
1319 rc = pmac_ide_do_suspend(hwif);
1321 pdev->dev.power.power_state = mesg;
1328 pmac_ide_pci_resume(struct pci_dev *pdev)
1330 ide_hwif_t *hwif = (ide_hwif_t *)pci_get_drvdata(pdev);
1333 if (pdev->dev.power.power_state.event != PM_EVENT_ON) {
1334 rc = pmac_ide_do_resume(hwif);
1336 pdev->dev.power.power_state = PMSG_ON;
1342 static struct of_device_id pmac_ide_macio_match[] =
1359 static struct macio_driver pmac_ide_macio_driver =
1362 .match_table = pmac_ide_macio_match,
1363 .probe = pmac_ide_macio_attach,
1364 .suspend = pmac_ide_macio_suspend,
1365 .resume = pmac_ide_macio_resume,
1368 static const struct pci_device_id pmac_ide_pci_match[] = {
1369 { PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_UNI_N_ATA), 0 },
1370 { PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_IPID_ATA100), 0 },
1371 { PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_K2_ATA100), 0 },
1372 { PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_SH_ATA), 0 },
1373 { PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_IPID2_ATA), 0 },
1377 static struct pci_driver pmac_ide_pci_driver = {
1379 .id_table = pmac_ide_pci_match,
1380 .probe = pmac_ide_pci_attach,
1381 .suspend = pmac_ide_pci_suspend,
1382 .resume = pmac_ide_pci_resume,
1384 MODULE_DEVICE_TABLE(pci, pmac_ide_pci_match);
1386 int __init pmac_ide_probe(void)
1390 if (!machine_is(powermac))
1393 #ifdef CONFIG_BLK_DEV_IDE_PMAC_ATA100FIRST
1394 error = pci_register_driver(&pmac_ide_pci_driver);
1397 error = macio_register_driver(&pmac_ide_macio_driver);
1399 pci_unregister_driver(&pmac_ide_pci_driver);
1403 error = macio_register_driver(&pmac_ide_macio_driver);
1406 error = pci_register_driver(&pmac_ide_pci_driver);
1408 macio_unregister_driver(&pmac_ide_macio_driver);
1416 #ifdef CONFIG_BLK_DEV_IDEDMA_PMAC
1419 * pmac_ide_build_dmatable builds the DBDMA command list
1420 * for a transfer and sets the DBDMA channel to point to it.
1423 pmac_ide_build_dmatable(ide_drive_t *drive, struct request *rq)
1425 struct dbdma_cmd *table;
1427 ide_hwif_t *hwif = HWIF(drive);
1428 pmac_ide_hwif_t* pmif = (pmac_ide_hwif_t *)hwif->hwif_data;
1429 volatile struct dbdma_regs __iomem *dma = pmif->dma_regs;
1430 struct scatterlist *sg;
1431 int wr = (rq_data_dir(rq) == WRITE);
1433 /* DMA table is already aligned */
1434 table = (struct dbdma_cmd *) pmif->dma_table_cpu;
1436 /* Make sure DMA controller is stopped (necessary ?) */
1437 writel((RUN|PAUSE|FLUSH|WAKE|DEAD) << 16, &dma->control);
1438 while (readl(&dma->status) & RUN)
1441 hwif->sg_nents = i = ide_build_sglist(drive, rq);
1446 /* Build DBDMA commands list */
1447 sg = hwif->sg_table;
1448 while (i && sg_dma_len(sg)) {
1452 cur_addr = sg_dma_address(sg);
1453 cur_len = sg_dma_len(sg);
1455 if (pmif->broken_dma && cur_addr & (L1_CACHE_BYTES - 1)) {
1456 if (pmif->broken_dma_warn == 0) {
1457 printk(KERN_WARNING "%s: DMA on non aligned address, "
1458 "switching to PIO on Ohare chipset\n", drive->name);
1459 pmif->broken_dma_warn = 1;
1461 goto use_pio_instead;
1464 unsigned int tc = (cur_len < 0xfe00)? cur_len: 0xfe00;
1466 if (count++ >= MAX_DCMDS) {
1467 printk(KERN_WARNING "%s: DMA table too small\n",
1469 goto use_pio_instead;
1471 st_le16(&table->command, wr? OUTPUT_MORE: INPUT_MORE);
1472 st_le16(&table->req_count, tc);
1473 st_le32(&table->phy_addr, cur_addr);
1475 table->xfer_status = 0;
1476 table->res_count = 0;
1485 /* convert the last command to an input/output last command */
1487 st_le16(&table[-1].command, wr? OUTPUT_LAST: INPUT_LAST);
1488 /* add the stop command to the end of the list */
1489 memset(table, 0, sizeof(struct dbdma_cmd));
1490 st_le16(&table->command, DBDMA_STOP);
1492 writel(hwif->dmatable_dma, &dma->cmdptr);
1496 printk(KERN_DEBUG "%s: empty DMA table?\n", drive->name);
1499 ide_destroy_dmatable(drive);
1501 return 0; /* revert to PIO for this request */
1504 /* Teardown mappings after DMA has completed. */
1506 pmac_ide_destroy_dmatable (ide_drive_t *drive)
1508 ide_hwif_t *hwif = drive->hwif;
1510 if (hwif->sg_nents) {
1511 ide_destroy_dmatable(drive);
1517 * Prepare a DMA transfer. We build the DMA table, adjust the timings for
1518 * a read on KeyLargo ATA/66 and mark us as waiting for DMA completion
1521 pmac_ide_dma_setup(ide_drive_t *drive)
1523 ide_hwif_t *hwif = HWIF(drive);
1524 pmac_ide_hwif_t* pmif = (pmac_ide_hwif_t *)hwif->hwif_data;
1525 struct request *rq = HWGROUP(drive)->rq;
1526 u8 unit = (drive->select.b.unit & 0x01);
1531 ata4 = (pmif->kind == controller_kl_ata4);
1533 if (!pmac_ide_build_dmatable(drive, rq)) {
1534 ide_map_sg(drive, rq);
1538 /* Apple adds 60ns to wrDataSetup on reads */
1539 if (ata4 && (pmif->timings[unit] & TR_66_UDMA_EN)) {
1540 writel(pmif->timings[unit] + (!rq_data_dir(rq) ? 0x00800000UL : 0),
1541 PMAC_IDE_REG(IDE_TIMING_CONFIG));
1542 (void)readl(PMAC_IDE_REG(IDE_TIMING_CONFIG));
1545 drive->waiting_for_dma = 1;
1551 pmac_ide_dma_exec_cmd(ide_drive_t *drive, u8 command)
1553 /* issue cmd to drive */
1554 ide_execute_command(drive, command, &ide_dma_intr, 2*WAIT_CMD, NULL);
1558 * Kick the DMA controller into life after the DMA command has been issued
1562 pmac_ide_dma_start(ide_drive_t *drive)
1564 pmac_ide_hwif_t* pmif = (pmac_ide_hwif_t *)HWIF(drive)->hwif_data;
1565 volatile struct dbdma_regs __iomem *dma;
1567 dma = pmif->dma_regs;
1569 writel((RUN << 16) | RUN, &dma->control);
1570 /* Make sure it gets to the controller right now */
1571 (void)readl(&dma->control);
1575 * After a DMA transfer, make sure the controller is stopped
1578 pmac_ide_dma_end (ide_drive_t *drive)
1580 pmac_ide_hwif_t* pmif = (pmac_ide_hwif_t *)HWIF(drive)->hwif_data;
1581 volatile struct dbdma_regs __iomem *dma;
1586 dma = pmif->dma_regs;
1588 drive->waiting_for_dma = 0;
1589 dstat = readl(&dma->status);
1590 writel(((RUN|WAKE|DEAD) << 16), &dma->control);
1591 pmac_ide_destroy_dmatable(drive);
1592 /* verify good dma status. we don't check for ACTIVE beeing 0. We should...
1593 * in theory, but with ATAPI decices doing buffer underruns, that would
1594 * cause us to disable DMA, which isn't what we want
1596 return (dstat & (RUN|DEAD)) != RUN;
1600 * Check out that the interrupt we got was for us. We can't always know this
1601 * for sure with those Apple interfaces (well, we could on the recent ones but
1602 * that's not implemented yet), on the other hand, we don't have shared interrupts
1603 * so it's not really a problem
1606 pmac_ide_dma_test_irq (ide_drive_t *drive)
1608 pmac_ide_hwif_t* pmif = (pmac_ide_hwif_t *)HWIF(drive)->hwif_data;
1609 volatile struct dbdma_regs __iomem *dma;
1610 unsigned long status, timeout;
1614 dma = pmif->dma_regs;
1616 /* We have to things to deal with here:
1618 * - The dbdma won't stop if the command was started
1619 * but completed with an error without transferring all
1620 * datas. This happens when bad blocks are met during
1621 * a multi-block transfer.
1623 * - The dbdma fifo hasn't yet finished flushing to
1624 * to system memory when the disk interrupt occurs.
1628 /* If ACTIVE is cleared, the STOP command have passed and
1629 * transfer is complete.
1631 status = readl(&dma->status);
1632 if (!(status & ACTIVE))
1634 if (!drive->waiting_for_dma)
1635 printk(KERN_WARNING "ide%d, ide_dma_test_irq \
1636 called while not waiting\n", HWIF(drive)->index);
1638 /* If dbdma didn't execute the STOP command yet, the
1639 * active bit is still set. We consider that we aren't
1640 * sharing interrupts (which is hopefully the case with
1641 * those controllers) and so we just try to flush the
1642 * channel for pending data in the fifo
1645 writel((FLUSH << 16) | FLUSH, &dma->control);
1649 status = readl(&dma->status);
1650 if ((status & FLUSH) == 0)
1652 if (++timeout > 100) {
1653 printk(KERN_WARNING "ide%d, ide_dma_test_irq \
1654 timeout flushing channel\n", HWIF(drive)->index);
1661 static void pmac_ide_dma_host_set(ide_drive_t *drive, int on)
1666 pmac_ide_dma_lost_irq (ide_drive_t *drive)
1668 pmac_ide_hwif_t* pmif = (pmac_ide_hwif_t *)HWIF(drive)->hwif_data;
1669 volatile struct dbdma_regs __iomem *dma;
1670 unsigned long status;
1674 dma = pmif->dma_regs;
1676 status = readl(&dma->status);
1677 printk(KERN_ERR "ide-pmac lost interrupt, dma status: %lx\n", status);
1680 static const struct ide_dma_ops pmac_dma_ops = {
1681 .dma_host_set = pmac_ide_dma_host_set,
1682 .dma_setup = pmac_ide_dma_setup,
1683 .dma_exec_cmd = pmac_ide_dma_exec_cmd,
1684 .dma_start = pmac_ide_dma_start,
1685 .dma_end = pmac_ide_dma_end,
1686 .dma_test_irq = pmac_ide_dma_test_irq,
1687 .dma_timeout = ide_dma_timeout,
1688 .dma_lost_irq = pmac_ide_dma_lost_irq,
1692 * Allocate the data structures needed for using DMA with an interface
1693 * and fill the proper list of functions pointers
1695 static int __devinit pmac_ide_init_dma(ide_hwif_t *hwif,
1696 const struct ide_port_info *d)
1698 pmac_ide_hwif_t *pmif = (pmac_ide_hwif_t *)hwif->hwif_data;
1699 struct pci_dev *dev = to_pci_dev(hwif->dev);
1701 /* We won't need pci_dev if we switch to generic consistent
1704 if (dev == NULL || pmif->dma_regs == 0)
1707 * Allocate space for the DBDMA commands.
1708 * The +2 is +1 for the stop command and +1 to allow for
1709 * aligning the start address to a multiple of 16 bytes.
1711 pmif->dma_table_cpu = (struct dbdma_cmd*)pci_alloc_consistent(
1713 (MAX_DCMDS + 2) * sizeof(struct dbdma_cmd),
1714 &hwif->dmatable_dma);
1715 if (pmif->dma_table_cpu == NULL) {
1716 printk(KERN_ERR "%s: unable to allocate DMA command list\n",
1721 hwif->sg_max_nents = MAX_DCMDS;
1726 static int __devinit pmac_ide_init_dma(ide_hwif_t *hwif,
1727 const struct ide_port_info *d)
1731 #endif /* CONFIG_BLK_DEV_IDEDMA_PMAC */
1733 module_init(pmac_ide_probe);
1735 MODULE_LICENSE("GPL");