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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002 * Support for IDE interfaces on PowerMacs.
Bartlomiej Zolnierkiewicz58f189f2008-02-01 23:09:33 +01003 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 * These IDE interfaces are memory-mapped and have a DBDMA channel
5 * for doing DMA.
6 *
7 * Copyright (C) 1998-2003 Paul Mackerras & Ben. Herrenschmidt
Bartlomiej Zolnierkiewicz8a972062008-07-16 20:33:38 +02008 * Copyright (C) 2007-2008 Bartlomiej Zolnierkiewicz
Linus Torvalds1da177e2005-04-16 15:20:36 -07009 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
14 *
15 * Some code taken from drivers/ide/ide-dma.c:
16 *
17 * Copyright (c) 1995-1998 Mark Lord
18 *
19 * TODO: - Use pre-calculated (kauai) timing tables all the time and
20 * get rid of the "rounded" tables used previously, so we have the
21 * same table format for all controllers and can then just have one
22 * big table
23 *
24 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070025#include <linux/types.h>
26#include <linux/kernel.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include <linux/init.h>
28#include <linux/delay.h>
29#include <linux/ide.h>
30#include <linux/notifier.h>
Paul Gortmakerbff78322011-07-03 13:41:29 -040031#include <linux/module.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070032#include <linux/reboot.h>
33#include <linux/pci.h>
34#include <linux/adb.h>
35#include <linux/pmu.h>
36#include <linux/scatterlist.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090037#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070038
39#include <asm/prom.h>
40#include <asm/io.h>
41#include <asm/dbdma.h>
42#include <asm/ide.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070043#include <asm/machdep.h>
44#include <asm/pmac_feature.h>
45#include <asm/sections.h>
46#include <asm/irq.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070047#include <asm/mediabay.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070048
Bartlomiej Zolnierkiewiczb36ba532008-07-23 19:55:49 +020049#define DRV_NAME "ide-pmac"
50
Linus Torvalds1da177e2005-04-16 15:20:36 -070051#undef IDE_PMAC_DEBUG
52
53#define DMA_WAIT_TIMEOUT 50
54
55typedef struct pmac_ide_hwif {
56 unsigned long regbase;
57 int irq;
58 int kind;
59 int aapl_bus_id;
Linus Torvalds1da177e2005-04-16 15:20:36 -070060 unsigned broken_dma : 1;
61 unsigned broken_dma_warn : 1;
62 struct device_node* node;
63 struct macio_dev *mdev;
64 u32 timings[4];
65 volatile u32 __iomem * *kauai_fcr;
Benjamin Herrenschmidtd58b0c32009-12-01 14:36:28 +000066 ide_hwif_t *hwif;
67
Linus Torvalds1da177e2005-04-16 15:20:36 -070068 /* Those fields are duplicating what is in hwif. We currently
69 * can't use the hwif ones because of some assumptions that are
70 * beeing done by the generic code about the kind of dma controller
71 * and format of the dma table. This will have to be fixed though.
72 */
73 volatile struct dbdma_regs __iomem * dma_regs;
74 struct dbdma_cmd* dma_table_cpu;
Linus Torvalds1da177e2005-04-16 15:20:36 -070075} pmac_ide_hwif_t;
76
Linus Torvalds1da177e2005-04-16 15:20:36 -070077enum {
78 controller_ohare, /* OHare based */
79 controller_heathrow, /* Heathrow/Paddington */
80 controller_kl_ata3, /* KeyLargo ATA-3 */
81 controller_kl_ata4, /* KeyLargo ATA-4 */
82 controller_un_ata6, /* UniNorth2 ATA-6 */
83 controller_k2_ata6, /* K2 ATA-6 */
84 controller_sh_ata6, /* Shasta ATA-6 */
85};
86
87static const char* model_name[] = {
88 "OHare ATA", /* OHare based */
89 "Heathrow ATA", /* Heathrow/Paddington */
90 "KeyLargo ATA-3", /* KeyLargo ATA-3 (MDMA only) */
91 "KeyLargo ATA-4", /* KeyLargo ATA-4 (UDMA/66) */
92 "UniNorth ATA-6", /* UniNorth2 ATA-6 (UDMA/100) */
93 "K2 ATA-6", /* K2 ATA-6 (UDMA/100) */
94 "Shasta ATA-6", /* Shasta ATA-6 (UDMA/133) */
95};
96
97/*
98 * Extra registers, both 32-bit little-endian
99 */
100#define IDE_TIMING_CONFIG 0x200
101#define IDE_INTERRUPT 0x300
102
103/* Kauai (U2) ATA has different register setup */
104#define IDE_KAUAI_PIO_CONFIG 0x200
105#define IDE_KAUAI_ULTRA_CONFIG 0x210
106#define IDE_KAUAI_POLL_CONFIG 0x220
107
108/*
109 * Timing configuration register definitions
110 */
111
112/* Number of IDE_SYSCLK_NS ticks, argument is in nanoseconds */
113#define SYSCLK_TICKS(t) (((t) + IDE_SYSCLK_NS - 1) / IDE_SYSCLK_NS)
114#define SYSCLK_TICKS_66(t) (((t) + IDE_SYSCLK_66_NS - 1) / IDE_SYSCLK_66_NS)
115#define IDE_SYSCLK_NS 30 /* 33Mhz cell */
116#define IDE_SYSCLK_66_NS 15 /* 66Mhz cell */
117
118/* 133Mhz cell, found in shasta.
119 * See comments about 100 Mhz Uninorth 2...
120 * Note that PIO_MASK and MDMA_MASK seem to overlap
121 */
122#define TR_133_PIOREG_PIO_MASK 0xff000fff
123#define TR_133_PIOREG_MDMA_MASK 0x00fff800
124#define TR_133_UDMAREG_UDMA_MASK 0x0003ffff
125#define TR_133_UDMAREG_UDMA_EN 0x00000001
126
127/* 100Mhz cell, found in Uninorth 2. I don't have much infos about
128 * this one yet, it appears as a pci device (106b/0033) on uninorth
129 * internal PCI bus and it's clock is controlled like gem or fw. It
130 * appears to be an evolution of keylargo ATA4 with a timing register
131 * extended to 2 32bits registers and a similar DBDMA channel. Other
132 * registers seem to exist but I can't tell much about them.
133 *
134 * So far, I'm using pre-calculated tables for this extracted from
135 * the values used by the MacOS X driver.
136 *
137 * The "PIO" register controls PIO and MDMA timings, the "ULTRA"
138 * register controls the UDMA timings. At least, it seems bit 0
139 * of this one enables UDMA vs. MDMA, and bits 4..7 are the
140 * cycle time in units of 10ns. Bits 8..15 are used by I don't
141 * know their meaning yet
142 */
143#define TR_100_PIOREG_PIO_MASK 0xff000fff
144#define TR_100_PIOREG_MDMA_MASK 0x00fff000
145#define TR_100_UDMAREG_UDMA_MASK 0x0000ffff
146#define TR_100_UDMAREG_UDMA_EN 0x00000001
147
148
149/* 66Mhz cell, found in KeyLargo. Can do ultra mode 0 to 2 on
150 * 40 connector cable and to 4 on 80 connector one.
151 * Clock unit is 15ns (66Mhz)
152 *
153 * 3 Values can be programmed:
154 * - Write data setup, which appears to match the cycle time. They
155 * also call it DIOW setup.
156 * - Ready to pause time (from spec)
157 * - Address setup. That one is weird. I don't see where exactly
158 * it fits in UDMA cycles, I got it's name from an obscure piece
159 * of commented out code in Darwin. They leave it to 0, we do as
160 * well, despite a comment that would lead to think it has a
161 * min value of 45ns.
162 * Apple also add 60ns to the write data setup (or cycle time ?) on
163 * reads.
164 */
165#define TR_66_UDMA_MASK 0xfff00000
166#define TR_66_UDMA_EN 0x00100000 /* Enable Ultra mode for DMA */
167#define TR_66_UDMA_ADDRSETUP_MASK 0xe0000000 /* Address setup */
168#define TR_66_UDMA_ADDRSETUP_SHIFT 29
169#define TR_66_UDMA_RDY2PAUS_MASK 0x1e000000 /* Ready 2 pause time */
170#define TR_66_UDMA_RDY2PAUS_SHIFT 25
171#define TR_66_UDMA_WRDATASETUP_MASK 0x01e00000 /* Write data setup time */
172#define TR_66_UDMA_WRDATASETUP_SHIFT 21
173#define TR_66_MDMA_MASK 0x000ffc00
174#define TR_66_MDMA_RECOVERY_MASK 0x000f8000
175#define TR_66_MDMA_RECOVERY_SHIFT 15
176#define TR_66_MDMA_ACCESS_MASK 0x00007c00
177#define TR_66_MDMA_ACCESS_SHIFT 10
178#define TR_66_PIO_MASK 0x000003ff
179#define TR_66_PIO_RECOVERY_MASK 0x000003e0
180#define TR_66_PIO_RECOVERY_SHIFT 5
181#define TR_66_PIO_ACCESS_MASK 0x0000001f
182#define TR_66_PIO_ACCESS_SHIFT 0
183
184/* 33Mhz cell, found in OHare, Heathrow (& Paddington) and KeyLargo
185 * Can do pio & mdma modes, clock unit is 30ns (33Mhz)
186 *
187 * The access time and recovery time can be programmed. Some older
188 * Darwin code base limit OHare to 150ns cycle time. I decided to do
189 * the same here fore safety against broken old hardware ;)
190 * The HalfTick bit, when set, adds half a clock (15ns) to the access
191 * time and removes one from recovery. It's not supported on KeyLargo
192 * implementation afaik. The E bit appears to be set for PIO mode 0 and
193 * is used to reach long timings used in this mode.
194 */
195#define TR_33_MDMA_MASK 0x003ff800
196#define TR_33_MDMA_RECOVERY_MASK 0x001f0000
197#define TR_33_MDMA_RECOVERY_SHIFT 16
198#define TR_33_MDMA_ACCESS_MASK 0x0000f800
199#define TR_33_MDMA_ACCESS_SHIFT 11
200#define TR_33_MDMA_HALFTICK 0x00200000
201#define TR_33_PIO_MASK 0x000007ff
202#define TR_33_PIO_E 0x00000400
203#define TR_33_PIO_RECOVERY_MASK 0x000003e0
204#define TR_33_PIO_RECOVERY_SHIFT 5
205#define TR_33_PIO_ACCESS_MASK 0x0000001f
206#define TR_33_PIO_ACCESS_SHIFT 0
207
208/*
209 * Interrupt register definitions
210 */
211#define IDE_INTR_DMA 0x80000000
212#define IDE_INTR_DEVICE 0x40000000
213
214/*
215 * FCR Register on Kauai. Not sure what bit 0x4 is ...
216 */
217#define KAUAI_FCR_UATA_MAGIC 0x00000004
218#define KAUAI_FCR_UATA_RESET_N 0x00000002
219#define KAUAI_FCR_UATA_ENABLE 0x00000001
220
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221/* Rounded Multiword DMA timings
222 *
223 * I gave up finding a generic formula for all controller
224 * types and instead, built tables based on timing values
225 * used by Apple in Darwin's implementation.
226 */
227struct mdma_timings_t {
228 int accessTime;
229 int recoveryTime;
230 int cycleTime;
231};
232
Jon Loeligeraacaf9b2005-09-17 10:36:54 -0500233struct mdma_timings_t mdma_timings_33[] =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234{
235 { 240, 240, 480 },
236 { 180, 180, 360 },
237 { 135, 135, 270 },
238 { 120, 120, 240 },
239 { 105, 105, 210 },
240 { 90, 90, 180 },
241 { 75, 75, 150 },
242 { 75, 45, 120 },
243 { 0, 0, 0 }
244};
245
Jon Loeligeraacaf9b2005-09-17 10:36:54 -0500246struct mdma_timings_t mdma_timings_33k[] =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247{
248 { 240, 240, 480 },
249 { 180, 180, 360 },
250 { 150, 150, 300 },
251 { 120, 120, 240 },
252 { 90, 120, 210 },
253 { 90, 90, 180 },
254 { 90, 60, 150 },
255 { 90, 30, 120 },
256 { 0, 0, 0 }
257};
258
Jon Loeligeraacaf9b2005-09-17 10:36:54 -0500259struct mdma_timings_t mdma_timings_66[] =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260{
261 { 240, 240, 480 },
262 { 180, 180, 360 },
263 { 135, 135, 270 },
264 { 120, 120, 240 },
265 { 105, 105, 210 },
266 { 90, 90, 180 },
267 { 90, 75, 165 },
268 { 75, 45, 120 },
269 { 0, 0, 0 }
270};
271
272/* KeyLargo ATA-4 Ultra DMA timings (rounded) */
273struct {
274 int addrSetup; /* ??? */
275 int rdy2pause;
276 int wrDataSetup;
Jon Loeligeraacaf9b2005-09-17 10:36:54 -0500277} kl66_udma_timings[] =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278{
279 { 0, 180, 120 }, /* Mode 0 */
280 { 0, 150, 90 }, /* 1 */
281 { 0, 120, 60 }, /* 2 */
282 { 0, 90, 45 }, /* 3 */
283 { 0, 90, 30 } /* 4 */
284};
285
286/* UniNorth 2 ATA/100 timings */
287struct kauai_timing {
288 int cycle_time;
289 u32 timing_reg;
290};
291
Jon Loeligeraacaf9b2005-09-17 10:36:54 -0500292static struct kauai_timing kauai_pio_timings[] =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293{
294 { 930 , 0x08000fff },
295 { 600 , 0x08000a92 },
296 { 383 , 0x0800060f },
297 { 360 , 0x08000492 },
298 { 330 , 0x0800048f },
299 { 300 , 0x080003cf },
300 { 270 , 0x080003cc },
301 { 240 , 0x0800038b },
302 { 239 , 0x0800030c },
303 { 180 , 0x05000249 },
Bartlomiej Zolnierkiewiczc15d5d42007-10-11 23:54:01 +0200304 { 120 , 0x04000148 },
305 { 0 , 0 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306};
307
Jon Loeligeraacaf9b2005-09-17 10:36:54 -0500308static struct kauai_timing kauai_mdma_timings[] =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309{
310 { 1260 , 0x00fff000 },
311 { 480 , 0x00618000 },
312 { 360 , 0x00492000 },
313 { 270 , 0x0038e000 },
314 { 240 , 0x0030c000 },
315 { 210 , 0x002cb000 },
316 { 180 , 0x00249000 },
317 { 150 , 0x00209000 },
318 { 120 , 0x00148000 },
319 { 0 , 0 },
320};
321
Jon Loeligeraacaf9b2005-09-17 10:36:54 -0500322static struct kauai_timing kauai_udma_timings[] =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323{
324 { 120 , 0x000070c0 },
325 { 90 , 0x00005d80 },
326 { 60 , 0x00004a60 },
327 { 45 , 0x00003a50 },
328 { 30 , 0x00002a30 },
329 { 20 , 0x00002921 },
330 { 0 , 0 },
331};
332
Jon Loeligeraacaf9b2005-09-17 10:36:54 -0500333static struct kauai_timing shasta_pio_timings[] =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334{
335 { 930 , 0x08000fff },
336 { 600 , 0x0A000c97 },
337 { 383 , 0x07000712 },
338 { 360 , 0x040003cd },
339 { 330 , 0x040003cd },
340 { 300 , 0x040003cd },
341 { 270 , 0x040003cd },
342 { 240 , 0x040003cd },
343 { 239 , 0x040003cd },
344 { 180 , 0x0400028b },
Bartlomiej Zolnierkiewiczc15d5d42007-10-11 23:54:01 +0200345 { 120 , 0x0400010a },
346 { 0 , 0 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347};
348
Jon Loeligeraacaf9b2005-09-17 10:36:54 -0500349static struct kauai_timing shasta_mdma_timings[] =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350{
351 { 1260 , 0x00fff000 },
352 { 480 , 0x00820800 },
353 { 360 , 0x00820800 },
354 { 270 , 0x00820800 },
355 { 240 , 0x00820800 },
356 { 210 , 0x00820800 },
357 { 180 , 0x00820800 },
358 { 150 , 0x0028b000 },
359 { 120 , 0x001ca000 },
360 { 0 , 0 },
361};
362
Jon Loeligeraacaf9b2005-09-17 10:36:54 -0500363static struct kauai_timing shasta_udma133_timings[] =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364{
365 { 120 , 0x00035901, },
366 { 90 , 0x000348b1, },
367 { 60 , 0x00033881, },
368 { 45 , 0x00033861, },
369 { 30 , 0x00033841, },
370 { 20 , 0x00033031, },
371 { 15 , 0x00033021, },
372 { 0 , 0 },
373};
374
375
376static inline u32
377kauai_lookup_timing(struct kauai_timing* table, int cycle_time)
378{
379 int i;
380
381 for (i=0; table[i].cycle_time; i++)
382 if (cycle_time > table[i+1].cycle_time)
383 return table[i].timing_reg;
Bartlomiej Zolnierkiewicz90a87ea2007-10-13 17:47:48 +0200384 BUG();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385 return 0;
386}
387
388/* allow up to 256 DBDMA commands per xfer */
389#define MAX_DCMDS 256
390
391/*
392 * Wait 1s for disk to answer on IDE bus after a hard reset
393 * of the device (via GPIO/FCR).
394 *
395 * Some devices seem to "pollute" the bus even after dropping
396 * the BSY bit (typically some combo drives slave on the UDMA
397 * bus) after a hard reset. Since we hard reset all drives on
398 * KeyLargo ATA66, we have to keep that delay around. I may end
399 * up not hard resetting anymore on these and keep the delay only
400 * for older interfaces instead (we have to reset when coming
401 * from MacOS...) --BenH.
402 */
403#define IDE_WAKEUP_DELAY (1*HZ)
404
Bartlomiej Zolnierkiewicz0d071922008-04-26 22:25:22 +0200405static int pmac_ide_init_dma(ide_hwif_t *, const struct ide_port_info *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406
Bartlomiej Zolnierkiewicz23579a22008-04-18 00:46:26 +0200407#define PMAC_IDE_REG(x) \
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200408 ((void __iomem *)((drive)->hwif->io_ports.data_addr + (x)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409
410/*
411 * Apply the timings of the proper unit (master/slave) to the shared
412 * timing register when selecting that unit. This version is for
413 * ASICs with a single timing register
414 */
Sergei Shtylyovabb596b2009-03-31 20:15:32 +0200415static void pmac_ide_apply_timings(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416{
Bartlomiej Zolnierkiewicz7b8797a2008-07-23 19:55:48 +0200417 ide_hwif_t *hwif = drive->hwif;
Jingoo Han58e48be2013-09-09 14:41:14 +0900418 pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419
Bartlomiej Zolnierkiewicz123995b2008-10-13 21:39:40 +0200420 if (drive->dn & 1)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421 writel(pmif->timings[1], PMAC_IDE_REG(IDE_TIMING_CONFIG));
422 else
423 writel(pmif->timings[0], PMAC_IDE_REG(IDE_TIMING_CONFIG));
424 (void)readl(PMAC_IDE_REG(IDE_TIMING_CONFIG));
425}
426
427/*
428 * Apply the timings of the proper unit (master/slave) to the shared
429 * timing register when selecting that unit. This version is for
430 * ASICs with a dual timing register (Kauai)
431 */
Sergei Shtylyovabb596b2009-03-31 20:15:32 +0200432static void pmac_ide_kauai_apply_timings(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433{
Bartlomiej Zolnierkiewicz7b8797a2008-07-23 19:55:48 +0200434 ide_hwif_t *hwif = drive->hwif;
Jingoo Han58e48be2013-09-09 14:41:14 +0900435 pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436
Bartlomiej Zolnierkiewicz123995b2008-10-13 21:39:40 +0200437 if (drive->dn & 1) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438 writel(pmif->timings[1], PMAC_IDE_REG(IDE_KAUAI_PIO_CONFIG));
439 writel(pmif->timings[3], PMAC_IDE_REG(IDE_KAUAI_ULTRA_CONFIG));
440 } else {
441 writel(pmif->timings[0], PMAC_IDE_REG(IDE_KAUAI_PIO_CONFIG));
442 writel(pmif->timings[2], PMAC_IDE_REG(IDE_KAUAI_ULTRA_CONFIG));
443 }
444 (void)readl(PMAC_IDE_REG(IDE_KAUAI_PIO_CONFIG));
445}
446
447/*
448 * Force an update of controller timing values for a given drive
449 */
Jon Loeligeraacaf9b2005-09-17 10:36:54 -0500450static void
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451pmac_ide_do_update_timings(ide_drive_t *drive)
452{
Bartlomiej Zolnierkiewicz7b8797a2008-07-23 19:55:48 +0200453 ide_hwif_t *hwif = drive->hwif;
Jingoo Han58e48be2013-09-09 14:41:14 +0900454 pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456 if (pmif->kind == controller_sh_ata6 ||
457 pmif->kind == controller_un_ata6 ||
458 pmif->kind == controller_k2_ata6)
Sergei Shtylyovabb596b2009-03-31 20:15:32 +0200459 pmac_ide_kauai_apply_timings(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460 else
Sergei Shtylyovabb596b2009-03-31 20:15:32 +0200461 pmac_ide_apply_timings(drive);
462}
463
464static void pmac_dev_select(ide_drive_t *drive)
465{
466 pmac_ide_apply_timings(drive);
467
468 writeb(drive->select | ATA_DEVICE_OBS,
469 (void __iomem *)drive->hwif->io_ports.device_addr);
470}
471
472static void pmac_kauai_dev_select(ide_drive_t *drive)
473{
474 pmac_ide_kauai_apply_timings(drive);
475
476 writeb(drive->select | ATA_DEVICE_OBS,
477 (void __iomem *)drive->hwif->io_ports.device_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478}
479
Bartlomiej Zolnierkiewiczc6dfa862008-07-23 19:55:51 +0200480static void pmac_exec_command(ide_hwif_t *hwif, u8 cmd)
481{
482 writeb(cmd, (void __iomem *)hwif->io_ports.command_addr);
483 (void)readl((void __iomem *)(hwif->io_ports.data_addr
484 + IDE_TIMING_CONFIG));
485}
486
Sergei Shtylyovecf3a312009-03-31 20:15:30 +0200487static void pmac_write_devctl(ide_hwif_t *hwif, u8 ctl)
Bartlomiej Zolnierkiewicz6e6afb32008-07-23 19:55:52 +0200488{
Bartlomiej Zolnierkiewicz6e6afb32008-07-23 19:55:52 +0200489 writeb(ctl, (void __iomem *)hwif->io_ports.ctl_addr);
490 (void)readl((void __iomem *)(hwif->io_ports.data_addr
491 + IDE_TIMING_CONFIG));
492}
493
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495 * Old tuning functions (called on hdparm -p), sets up drive PIO timings
496 */
Bartlomiej Zolnierkiewicze085b3c2010-01-19 01:44:41 -0800497static void pmac_ide_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498{
Jingoo Han58e48be2013-09-09 14:41:14 +0900499 pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
Bartlomiej Zolnierkiewicze085b3c2010-01-19 01:44:41 -0800500 const u8 pio = drive->pio_mode - XFER_PIO_0;
Bartlomiej Zolnierkiewicz8a972062008-07-16 20:33:38 +0200501 struct ide_timing *tim = ide_timing_find_mode(XFER_PIO_0 + pio);
Benjamin Herrenschmidt0b46ff22007-10-13 17:47:50 +0200502 u32 *timings, t;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503 unsigned accessTicks, recTicks;
504 unsigned accessTime, recTime;
Bartlomiej Zolnierkiewicz7dd00082007-07-20 01:11:56 +0200505 unsigned int cycle_time;
506
Linus Torvalds1da177e2005-04-16 15:20:36 -0700507 /* which drive is it ? */
Bartlomiej Zolnierkiewicz123995b2008-10-13 21:39:40 +0200508 timings = &pmif->timings[drive->dn & 1];
Benjamin Herrenschmidt0b46ff22007-10-13 17:47:50 +0200509 t = *timings;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510
Bartlomiej Zolnierkiewicz7dd00082007-07-20 01:11:56 +0200511 cycle_time = ide_pio_cycle_time(drive, pio);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512
513 switch (pmif->kind) {
514 case controller_sh_ata6: {
515 /* 133Mhz cell */
Bartlomiej Zolnierkiewicz7dd00082007-07-20 01:11:56 +0200516 u32 tr = kauai_lookup_timing(shasta_pio_timings, cycle_time);
Benjamin Herrenschmidt0b46ff22007-10-13 17:47:50 +0200517 t = (t & ~TR_133_PIOREG_PIO_MASK) | tr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518 break;
519 }
520 case controller_un_ata6:
521 case controller_k2_ata6: {
522 /* 100Mhz cell */
Bartlomiej Zolnierkiewicz7dd00082007-07-20 01:11:56 +0200523 u32 tr = kauai_lookup_timing(kauai_pio_timings, cycle_time);
Benjamin Herrenschmidt0b46ff22007-10-13 17:47:50 +0200524 t = (t & ~TR_100_PIOREG_PIO_MASK) | tr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525 break;
526 }
527 case controller_kl_ata4:
528 /* 66Mhz cell */
Bartlomiej Zolnierkiewicz8a972062008-07-16 20:33:38 +0200529 recTime = cycle_time - tim->active - tim->setup;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700530 recTime = max(recTime, 150U);
Bartlomiej Zolnierkiewicz8a972062008-07-16 20:33:38 +0200531 accessTime = tim->active;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532 accessTime = max(accessTime, 150U);
533 accessTicks = SYSCLK_TICKS_66(accessTime);
534 accessTicks = min(accessTicks, 0x1fU);
535 recTicks = SYSCLK_TICKS_66(recTime);
536 recTicks = min(recTicks, 0x1fU);
Benjamin Herrenschmidt0b46ff22007-10-13 17:47:50 +0200537 t = (t & ~TR_66_PIO_MASK) |
538 (accessTicks << TR_66_PIO_ACCESS_SHIFT) |
539 (recTicks << TR_66_PIO_RECOVERY_SHIFT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540 break;
541 default: {
542 /* 33Mhz cell */
543 int ebit = 0;
Bartlomiej Zolnierkiewicz8a972062008-07-16 20:33:38 +0200544 recTime = cycle_time - tim->active - tim->setup;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545 recTime = max(recTime, 150U);
Bartlomiej Zolnierkiewicz8a972062008-07-16 20:33:38 +0200546 accessTime = tim->active;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700547 accessTime = max(accessTime, 150U);
548 accessTicks = SYSCLK_TICKS(accessTime);
549 accessTicks = min(accessTicks, 0x1fU);
550 accessTicks = max(accessTicks, 4U);
551 recTicks = SYSCLK_TICKS(recTime);
552 recTicks = min(recTicks, 0x1fU);
553 recTicks = max(recTicks, 5U) - 4;
554 if (recTicks > 9) {
555 recTicks--; /* guess, but it's only for PIO0, so... */
556 ebit = 1;
557 }
Benjamin Herrenschmidt0b46ff22007-10-13 17:47:50 +0200558 t = (t & ~TR_33_PIO_MASK) |
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559 (accessTicks << TR_33_PIO_ACCESS_SHIFT) |
560 (recTicks << TR_33_PIO_RECOVERY_SHIFT);
561 if (ebit)
Benjamin Herrenschmidt0b46ff22007-10-13 17:47:50 +0200562 t |= TR_33_PIO_E;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563 break;
564 }
565 }
566
567#ifdef IDE_PMAC_DEBUG
568 printk(KERN_ERR "%s: Set PIO timing for mode %d, reg: 0x%08x\n",
569 drive->name, pio, *timings);
570#endif
571
Benjamin Herrenschmidt0b46ff22007-10-13 17:47:50 +0200572 *timings = t;
Bartlomiej Zolnierkiewiczc15d5d42007-10-11 23:54:01 +0200573 pmac_ide_do_update_timings(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574}
575
Linus Torvalds1da177e2005-04-16 15:20:36 -0700576/*
577 * Calculate KeyLargo ATA/66 UDMA timings
578 */
Jon Loeligeraacaf9b2005-09-17 10:36:54 -0500579static int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580set_timings_udma_ata4(u32 *timings, u8 speed)
581{
582 unsigned rdyToPauseTicks, wrDataSetupTicks, addrTicks;
583
584 if (speed > XFER_UDMA_4)
585 return 1;
586
587 rdyToPauseTicks = SYSCLK_TICKS_66(kl66_udma_timings[speed & 0xf].rdy2pause);
588 wrDataSetupTicks = SYSCLK_TICKS_66(kl66_udma_timings[speed & 0xf].wrDataSetup);
589 addrTicks = SYSCLK_TICKS_66(kl66_udma_timings[speed & 0xf].addrSetup);
590
591 *timings = ((*timings) & ~(TR_66_UDMA_MASK | TR_66_MDMA_MASK)) |
592 (wrDataSetupTicks << TR_66_UDMA_WRDATASETUP_SHIFT) |
593 (rdyToPauseTicks << TR_66_UDMA_RDY2PAUS_SHIFT) |
594 (addrTicks <<TR_66_UDMA_ADDRSETUP_SHIFT) |
595 TR_66_UDMA_EN;
596#ifdef IDE_PMAC_DEBUG
597 printk(KERN_ERR "ide_pmac: Set UDMA timing for mode %d, reg: 0x%08x\n",
598 speed & 0xf, *timings);
599#endif
600
601 return 0;
602}
603
604/*
605 * Calculate Kauai ATA/100 UDMA timings
606 */
Jon Loeligeraacaf9b2005-09-17 10:36:54 -0500607static int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608set_timings_udma_ata6(u32 *pio_timings, u32 *ultra_timings, u8 speed)
609{
610 struct ide_timing *t = ide_timing_find_mode(speed);
611 u32 tr;
612
613 if (speed > XFER_UDMA_5 || t == NULL)
614 return 1;
615 tr = kauai_lookup_timing(kauai_udma_timings, (int)t->udma);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700616 *ultra_timings = ((*ultra_timings) & ~TR_100_UDMAREG_UDMA_MASK) | tr;
617 *ultra_timings = (*ultra_timings) | TR_100_UDMAREG_UDMA_EN;
618
619 return 0;
620}
621
622/*
623 * Calculate Shasta ATA/133 UDMA timings
624 */
Jon Loeligeraacaf9b2005-09-17 10:36:54 -0500625static int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700626set_timings_udma_shasta(u32 *pio_timings, u32 *ultra_timings, u8 speed)
627{
628 struct ide_timing *t = ide_timing_find_mode(speed);
629 u32 tr;
630
631 if (speed > XFER_UDMA_6 || t == NULL)
632 return 1;
633 tr = kauai_lookup_timing(shasta_udma133_timings, (int)t->udma);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700634 *ultra_timings = ((*ultra_timings) & ~TR_133_UDMAREG_UDMA_MASK) | tr;
635 *ultra_timings = (*ultra_timings) | TR_133_UDMAREG_UDMA_EN;
636
637 return 0;
638}
639
640/*
641 * Calculate MDMA timings for all cells
642 */
Bartlomiej Zolnierkiewicz90f72ec2007-10-13 17:47:48 +0200643static void
Linus Torvalds1da177e2005-04-16 15:20:36 -0700644set_timings_mdma(ide_drive_t *drive, int intf_type, u32 *timings, u32 *timings2,
Bartlomiej Zolnierkiewicz90f72ec2007-10-13 17:47:48 +0200645 u8 speed)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700646{
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200647 u16 *id = drive->id;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700648 int cycleTime, accessTime = 0, recTime = 0;
649 unsigned accessTicks, recTicks;
650 struct mdma_timings_t* tm = NULL;
651 int i;
652
653 /* Get default cycle time for mode */
654 switch(speed & 0xf) {
655 case 0: cycleTime = 480; break;
656 case 1: cycleTime = 150; break;
657 case 2: cycleTime = 120; break;
658 default:
Bartlomiej Zolnierkiewicz90f72ec2007-10-13 17:47:48 +0200659 BUG();
660 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661 }
Bartlomiej Zolnierkiewicz90f72ec2007-10-13 17:47:48 +0200662
663 /* Check if drive provides explicit DMA cycle time */
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200664 if ((id[ATA_ID_FIELD_VALID] & 2) && id[ATA_ID_EIDE_DMA_TIME])
665 cycleTime = max_t(int, id[ATA_ID_EIDE_DMA_TIME], cycleTime);
Bartlomiej Zolnierkiewicz90f72ec2007-10-13 17:47:48 +0200666
Linus Torvalds1da177e2005-04-16 15:20:36 -0700667 /* OHare limits according to some old Apple sources */
668 if ((intf_type == controller_ohare) && (cycleTime < 150))
669 cycleTime = 150;
670 /* Get the proper timing array for this controller */
671 switch(intf_type) {
672 case controller_sh_ata6:
673 case controller_un_ata6:
674 case controller_k2_ata6:
675 break;
676 case controller_kl_ata4:
677 tm = mdma_timings_66;
678 break;
679 case controller_kl_ata3:
680 tm = mdma_timings_33k;
681 break;
682 default:
683 tm = mdma_timings_33;
684 break;
685 }
686 if (tm != NULL) {
687 /* Lookup matching access & recovery times */
688 i = -1;
689 for (;;) {
690 if (tm[i+1].cycleTime < cycleTime)
691 break;
692 i++;
693 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700694 cycleTime = tm[i].cycleTime;
695 accessTime = tm[i].accessTime;
696 recTime = tm[i].recoveryTime;
697
698#ifdef IDE_PMAC_DEBUG
699 printk(KERN_ERR "%s: MDMA, cycleTime: %d, accessTime: %d, recTime: %d\n",
700 drive->name, cycleTime, accessTime, recTime);
701#endif
702 }
703 switch(intf_type) {
704 case controller_sh_ata6: {
705 /* 133Mhz cell */
706 u32 tr = kauai_lookup_timing(shasta_mdma_timings, cycleTime);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700707 *timings = ((*timings) & ~TR_133_PIOREG_MDMA_MASK) | tr;
708 *timings2 = (*timings2) & ~TR_133_UDMAREG_UDMA_EN;
709 }
Dan Carpenterd4f8c2e2016-07-14 13:48:02 +0300710 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700711 case controller_un_ata6:
712 case controller_k2_ata6: {
713 /* 100Mhz cell */
714 u32 tr = kauai_lookup_timing(kauai_mdma_timings, cycleTime);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700715 *timings = ((*timings) & ~TR_100_PIOREG_MDMA_MASK) | tr;
716 *timings2 = (*timings2) & ~TR_100_UDMAREG_UDMA_EN;
717 }
718 break;
719 case controller_kl_ata4:
720 /* 66Mhz cell */
721 accessTicks = SYSCLK_TICKS_66(accessTime);
722 accessTicks = min(accessTicks, 0x1fU);
723 accessTicks = max(accessTicks, 0x1U);
724 recTicks = SYSCLK_TICKS_66(recTime);
725 recTicks = min(recTicks, 0x1fU);
726 recTicks = max(recTicks, 0x3U);
727 /* Clear out mdma bits and disable udma */
728 *timings = ((*timings) & ~(TR_66_MDMA_MASK | TR_66_UDMA_MASK)) |
729 (accessTicks << TR_66_MDMA_ACCESS_SHIFT) |
730 (recTicks << TR_66_MDMA_RECOVERY_SHIFT);
731 break;
732 case controller_kl_ata3:
733 /* 33Mhz cell on KeyLargo */
734 accessTicks = SYSCLK_TICKS(accessTime);
735 accessTicks = max(accessTicks, 1U);
736 accessTicks = min(accessTicks, 0x1fU);
737 accessTime = accessTicks * IDE_SYSCLK_NS;
738 recTicks = SYSCLK_TICKS(recTime);
739 recTicks = max(recTicks, 1U);
740 recTicks = min(recTicks, 0x1fU);
741 *timings = ((*timings) & ~TR_33_MDMA_MASK) |
742 (accessTicks << TR_33_MDMA_ACCESS_SHIFT) |
743 (recTicks << TR_33_MDMA_RECOVERY_SHIFT);
744 break;
745 default: {
746 /* 33Mhz cell on others */
747 int halfTick = 0;
748 int origAccessTime = accessTime;
749 int origRecTime = recTime;
750
751 accessTicks = SYSCLK_TICKS(accessTime);
752 accessTicks = max(accessTicks, 1U);
753 accessTicks = min(accessTicks, 0x1fU);
754 accessTime = accessTicks * IDE_SYSCLK_NS;
755 recTicks = SYSCLK_TICKS(recTime);
756 recTicks = max(recTicks, 2U) - 1;
757 recTicks = min(recTicks, 0x1fU);
758 recTime = (recTicks + 1) * IDE_SYSCLK_NS;
759 if ((accessTicks > 1) &&
760 ((accessTime - IDE_SYSCLK_NS/2) >= origAccessTime) &&
761 ((recTime - IDE_SYSCLK_NS/2) >= origRecTime)) {
762 halfTick = 1;
763 accessTicks--;
764 }
765 *timings = ((*timings) & ~TR_33_MDMA_MASK) |
766 (accessTicks << TR_33_MDMA_ACCESS_SHIFT) |
767 (recTicks << TR_33_MDMA_RECOVERY_SHIFT);
768 if (halfTick)
769 *timings |= TR_33_MDMA_HALFTICK;
770 }
771 }
772#ifdef IDE_PMAC_DEBUG
773 printk(KERN_ERR "%s: Set MDMA timing for mode %d, reg: 0x%08x\n",
774 drive->name, speed & 0xf, *timings);
775#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700776}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700777
Bartlomiej Zolnierkiewicz87761682010-01-19 01:45:29 -0800778static void pmac_ide_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779{
Jingoo Han58e48be2013-09-09 14:41:14 +0900780 pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700781 int ret = 0;
Bartlomiej Zolnierkiewicz085798b2007-10-13 17:47:48 +0200782 u32 *timings, *timings2, tl[2];
Bartlomiej Zolnierkiewicz123995b2008-10-13 21:39:40 +0200783 u8 unit = drive->dn & 1;
Bartlomiej Zolnierkiewicz87761682010-01-19 01:45:29 -0800784 const u8 speed = drive->dma_mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700785
Linus Torvalds1da177e2005-04-16 15:20:36 -0700786 timings = &pmif->timings[unit];
787 timings2 = &pmif->timings[unit+2];
Bartlomiej Zolnierkiewicz085798b2007-10-13 17:47:48 +0200788
789 /* Copy timings to local image */
790 tl[0] = *timings;
791 tl[1] = *timings2;
792
Bartlomiej Zolnierkiewicz4db90a12008-01-25 22:17:18 +0100793 if (speed >= XFER_UDMA_0) {
794 if (pmif->kind == controller_kl_ata4)
795 ret = set_timings_udma_ata4(&tl[0], speed);
796 else if (pmif->kind == controller_un_ata6
797 || pmif->kind == controller_k2_ata6)
798 ret = set_timings_udma_ata6(&tl[0], &tl[1], speed);
799 else if (pmif->kind == controller_sh_ata6)
800 ret = set_timings_udma_shasta(&tl[0], &tl[1], speed);
801 else
802 ret = -1;
803 } else
804 set_timings_mdma(drive, pmif->kind, &tl[0], &tl[1], speed);
Bartlomiej Zolnierkiewicz53846572008-12-08 17:52:05 +0100805
Linus Torvalds1da177e2005-04-16 15:20:36 -0700806 if (ret)
Bartlomiej Zolnierkiewicz88b2b322007-10-13 17:47:51 +0200807 return;
Bartlomiej Zolnierkiewicz085798b2007-10-13 17:47:48 +0200808
809 /* Apply timings to controller */
810 *timings = tl[0];
811 *timings2 = tl[1];
812
Linus Torvalds1da177e2005-04-16 15:20:36 -0700813 pmac_ide_do_update_timings(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700814}
815
816/*
817 * Blast some well known "safe" values to the timing registers at init or
818 * wakeup from sleep time, before we do real calculation
819 */
Jon Loeligeraacaf9b2005-09-17 10:36:54 -0500820static void
Linus Torvalds1da177e2005-04-16 15:20:36 -0700821sanitize_timings(pmac_ide_hwif_t *pmif)
822{
823 unsigned int value, value2 = 0;
824
825 switch(pmif->kind) {
826 case controller_sh_ata6:
827 value = 0x0a820c97;
828 value2 = 0x00033031;
829 break;
830 case controller_un_ata6:
831 case controller_k2_ata6:
832 value = 0x08618a92;
833 value2 = 0x00002921;
834 break;
835 case controller_kl_ata4:
836 value = 0x0008438c;
837 break;
838 case controller_kl_ata3:
839 value = 0x00084526;
840 break;
841 case controller_heathrow:
842 case controller_ohare:
843 default:
844 value = 0x00074526;
845 break;
846 }
847 pmif->timings[0] = pmif->timings[1] = value;
848 pmif->timings[2] = pmif->timings[3] = value2;
849}
850
Benjamin Herrenschmidtd58b0c32009-12-01 14:36:28 +0000851static int on_media_bay(pmac_ide_hwif_t *pmif)
852{
853 return pmif->mdev && pmif->mdev->media_bay != NULL;
854}
855
Linus Torvalds1da177e2005-04-16 15:20:36 -0700856/* Suspend call back, should be called after the child devices
857 * have actually been suspended
858 */
Bartlomiej Zolnierkiewicz7b8797a2008-07-23 19:55:48 +0200859static int pmac_ide_do_suspend(pmac_ide_hwif_t *pmif)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700860{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700861 /* We clear the timings */
862 pmif->timings[0] = 0;
863 pmif->timings[1] = 0;
864
Benjamin Herrenschmidt616299a2005-05-01 08:58:41 -0700865 disable_irq(pmif->irq);
866
Linus Torvalds1da177e2005-04-16 15:20:36 -0700867 /* The media bay will handle itself just fine */
Benjamin Herrenschmidtd58b0c32009-12-01 14:36:28 +0000868 if (on_media_bay(pmif))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700869 return 0;
870
871 /* Kauai has bus control FCRs directly here */
872 if (pmif->kauai_fcr) {
873 u32 fcr = readl(pmif->kauai_fcr);
874 fcr &= ~(KAUAI_FCR_UATA_RESET_N | KAUAI_FCR_UATA_ENABLE);
875 writel(fcr, pmif->kauai_fcr);
876 }
877
878 /* Disable the bus on older machines and the cell on kauai */
879 ppc_md.feature_call(PMAC_FTR_IDE_ENABLE, pmif->node, pmif->aapl_bus_id,
880 0);
881
882 return 0;
883}
884
885/* Resume call back, should be called before the child devices
886 * are resumed
887 */
Bartlomiej Zolnierkiewicz7b8797a2008-07-23 19:55:48 +0200888static int pmac_ide_do_resume(pmac_ide_hwif_t *pmif)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700889{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700890 /* Hard reset & re-enable controller (do we really need to reset ? -BenH) */
Benjamin Herrenschmidtd58b0c32009-12-01 14:36:28 +0000891 if (!on_media_bay(pmif)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700892 ppc_md.feature_call(PMAC_FTR_IDE_RESET, pmif->node, pmif->aapl_bus_id, 1);
893 ppc_md.feature_call(PMAC_FTR_IDE_ENABLE, pmif->node, pmif->aapl_bus_id, 1);
894 msleep(10);
895 ppc_md.feature_call(PMAC_FTR_IDE_RESET, pmif->node, pmif->aapl_bus_id, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700896
897 /* Kauai has it different */
898 if (pmif->kauai_fcr) {
899 u32 fcr = readl(pmif->kauai_fcr);
900 fcr |= KAUAI_FCR_UATA_RESET_N | KAUAI_FCR_UATA_ENABLE;
901 writel(fcr, pmif->kauai_fcr);
902 }
Benjamin Herrenschmidt616299a2005-05-01 08:58:41 -0700903
904 msleep(jiffies_to_msecs(IDE_WAKEUP_DELAY));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700905 }
906
907 /* Sanitize drive timings */
908 sanitize_timings(pmif);
909
Benjamin Herrenschmidt616299a2005-05-01 08:58:41 -0700910 enable_irq(pmif->irq);
911
Linus Torvalds1da177e2005-04-16 15:20:36 -0700912 return 0;
913}
914
Bartlomiej Zolnierkiewicz07a6c662008-06-15 21:00:23 +0200915static u8 pmac_ide_cable_detect(ide_hwif_t *hwif)
916{
Jingoo Han58e48be2013-09-09 14:41:14 +0900917 pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
Bartlomiej Zolnierkiewicz07a6c662008-06-15 21:00:23 +0200918 struct device_node *np = pmif->node;
919 const char *cable = of_get_property(np, "cable-type", NULL);
TOMARI Hisanobua9d5a972009-03-31 20:15:34 +0200920 struct device_node *root = of_find_node_by_path("/");
921 const char *model = of_get_property(root, "model", NULL);
Bartlomiej Zolnierkiewicz07a6c662008-06-15 21:00:23 +0200922
923 /* Get cable type from device-tree. */
TOMARI Hisanobua9d5a972009-03-31 20:15:34 +0200924 if (cable && !strncmp(cable, "80-", 3)) {
925 /* Some drives fail to detect 80c cable in PowerBook */
926 /* These machine use proprietary short IDE cable anyway */
927 if (!strncmp(model, "PowerBook", 9))
928 return ATA_CBL_PATA40_SHORT;
929 else
930 return ATA_CBL_PATA80;
931 }
Bartlomiej Zolnierkiewicz07a6c662008-06-15 21:00:23 +0200932
933 /*
934 * G5's seem to have incorrect cable type in device-tree.
935 * Let's assume they have a 80 conductor cable, this seem
936 * to be always the case unless the user mucked around.
937 */
938 if (of_device_is_compatible(np, "K2-UATA") ||
939 of_device_is_compatible(np, "shasta-ata"))
940 return ATA_CBL_PATA80;
941
942 return ATA_CBL_PATA40;
943}
944
Bartlomiej Zolnierkiewicz07eb1062008-07-23 19:55:49 +0200945static void pmac_ide_init_dev(ide_drive_t *drive)
946{
947 ide_hwif_t *hwif = drive->hwif;
Jingoo Han58e48be2013-09-09 14:41:14 +0900948 pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
Bartlomiej Zolnierkiewicz07eb1062008-07-23 19:55:49 +0200949
Benjamin Herrenschmidtd58b0c32009-12-01 14:36:28 +0000950 if (on_media_bay(pmif)) {
951 if (check_media_bay(pmif->mdev->media_bay) == MB_CD) {
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200952 drive->dev_flags &= ~IDE_DFLAG_NOPROBE;
Bartlomiej Zolnierkiewicz07eb1062008-07-23 19:55:49 +0200953 return;
954 }
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200955 drive->dev_flags |= IDE_DFLAG_NOPROBE;
Bartlomiej Zolnierkiewicz07eb1062008-07-23 19:55:49 +0200956 }
957}
958
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200959static const struct ide_tp_ops pmac_tp_ops = {
960 .exec_command = pmac_exec_command,
961 .read_status = ide_read_status,
962 .read_altstatus = ide_read_altstatus,
Sergei Shtylyovecf3a312009-03-31 20:15:30 +0200963 .write_devctl = pmac_write_devctl,
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200964
Sergei Shtylyovabb596b2009-03-31 20:15:32 +0200965 .dev_select = pmac_dev_select,
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200966 .tf_load = ide_tf_load,
967 .tf_read = ide_tf_read,
968
969 .input_data = ide_input_data,
970 .output_data = ide_output_data,
971};
972
Sergei Shtylyovabb596b2009-03-31 20:15:32 +0200973static const struct ide_tp_ops pmac_ata6_tp_ops = {
974 .exec_command = pmac_exec_command,
975 .read_status = ide_read_status,
976 .read_altstatus = ide_read_altstatus,
977 .write_devctl = pmac_write_devctl,
978
979 .dev_select = pmac_kauai_dev_select,
980 .tf_load = ide_tf_load,
981 .tf_read = ide_tf_read,
982
983 .input_data = ide_input_data,
984 .output_data = ide_output_data,
Bartlomiej Zolnierkiewicz07a6c662008-06-15 21:00:23 +0200985};
986
987static const struct ide_port_ops pmac_ide_ata4_port_ops = {
Bartlomiej Zolnierkiewicz07eb1062008-07-23 19:55:49 +0200988 .init_dev = pmac_ide_init_dev,
Bartlomiej Zolnierkiewicz07a6c662008-06-15 21:00:23 +0200989 .set_pio_mode = pmac_ide_set_pio_mode,
990 .set_dma_mode = pmac_ide_set_dma_mode,
Bartlomiej Zolnierkiewicz07a6c662008-06-15 21:00:23 +0200991 .cable_detect = pmac_ide_cable_detect,
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +0200992};
993
994static const struct ide_port_ops pmac_ide_port_ops = {
Bartlomiej Zolnierkiewicz07eb1062008-07-23 19:55:49 +0200995 .init_dev = pmac_ide_init_dev,
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +0200996 .set_pio_mode = pmac_ide_set_pio_mode,
997 .set_dma_mode = pmac_ide_set_dma_mode,
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +0200998};
999
Bartlomiej Zolnierkiewiczf37afda2008-04-26 22:25:24 +02001000static const struct ide_dma_ops pmac_dma_ops;
Bartlomiej Zolnierkiewicz5e37bdc2008-04-26 22:25:24 +02001001
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001002static const struct ide_port_info pmac_port_info = {
Bartlomiej Zolnierkiewiczb36ba532008-07-23 19:55:49 +02001003 .name = DRV_NAME,
Bartlomiej Zolnierkiewicz0d071922008-04-26 22:25:22 +02001004 .init_dma = pmac_ide_init_dma,
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001005 .chipset = ide_pmac,
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +02001006 .tp_ops = &pmac_tp_ops,
1007 .port_ops = &pmac_ide_port_ops,
Bartlomiej Zolnierkiewicz5e37bdc2008-04-26 22:25:24 +02001008 .dma_ops = &pmac_dma_ops,
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001009 .host_flags = IDE_HFLAG_SET_PIO_MODE_KEEP_DMA |
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001010 IDE_HFLAG_POST_SET_MODE |
Bartlomiej Zolnierkiewiczc5dd43e2008-04-28 23:44:37 +02001011 IDE_HFLAG_MMIO |
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001012 IDE_HFLAG_UNMASK_IRQS,
1013 .pio_mask = ATA_PIO4,
1014 .mwdma_mask = ATA_MWDMA2,
1015};
1016
Linus Torvalds1da177e2005-04-16 15:20:36 -07001017/*
1018 * Setup, register & probe an IDE channel driven by this driver, this is
Bartlomiej Zolnierkiewicz5b164642008-06-15 21:00:23 +02001019 * called by one of the 2 probe functions (macio or PCI).
Linus Torvalds1da177e2005-04-16 15:20:36 -07001020 */
Greg Kroah-Hartmanfe31edc2012-12-21 13:21:03 -08001021static int pmac_ide_setup_device(pmac_ide_hwif_t *pmif, struct ide_hw *hw)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001022{
1023 struct device_node *np = pmif->node;
Jeremy Kerr018a3d12006-07-12 15:40:29 +10001024 const int *bidp;
Bartlomiej Zolnierkiewicz48c3c102008-07-23 19:55:57 +02001025 struct ide_host *host;
Bartlomiej Zolnierkiewiczb36ba532008-07-23 19:55:49 +02001026 ide_hwif_t *hwif;
Bartlomiej Zolnierkiewicz9f36d312009-05-17 19:12:25 +02001027 struct ide_hw *hws[] = { hw };
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001028 struct ide_port_info d = pmac_port_info;
Bartlomiej Zolnierkiewicz6f904d02008-07-23 19:55:57 +02001029 int rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001030
Linus Torvalds1da177e2005-04-16 15:20:36 -07001031 pmif->broken_dma = pmif->broken_dma_warn = 0;
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001032 if (of_device_is_compatible(np, "shasta-ata")) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001033 pmif->kind = controller_sh_ata6;
Sergei Shtylyovabb596b2009-03-31 20:15:32 +02001034 d.tp_ops = &pmac_ata6_tp_ops;
1035 d.port_ops = &pmac_ide_ata4_port_ops;
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001036 d.udma_mask = ATA_UDMA6;
1037 } else if (of_device_is_compatible(np, "kauai-ata")) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001038 pmif->kind = controller_un_ata6;
Sergei Shtylyovabb596b2009-03-31 20:15:32 +02001039 d.tp_ops = &pmac_ata6_tp_ops;
1040 d.port_ops = &pmac_ide_ata4_port_ops;
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001041 d.udma_mask = ATA_UDMA5;
1042 } else if (of_device_is_compatible(np, "K2-UATA")) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001043 pmif->kind = controller_k2_ata6;
Sergei Shtylyovabb596b2009-03-31 20:15:32 +02001044 d.tp_ops = &pmac_ata6_tp_ops;
1045 d.port_ops = &pmac_ide_ata4_port_ops;
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001046 d.udma_mask = ATA_UDMA5;
1047 } else if (of_device_is_compatible(np, "keylargo-ata")) {
1048 if (strcmp(np->name, "ata-4") == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001049 pmif->kind = controller_kl_ata4;
Bartlomiej Zolnierkiewicz07a6c662008-06-15 21:00:23 +02001050 d.port_ops = &pmac_ide_ata4_port_ops;
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001051 d.udma_mask = ATA_UDMA4;
1052 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -07001053 pmif->kind = controller_kl_ata3;
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001054 } else if (of_device_is_compatible(np, "heathrow-ata")) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001055 pmif->kind = controller_heathrow;
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001056 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001057 pmif->kind = controller_ohare;
1058 pmif->broken_dma = 1;
1059 }
1060
Stephen Rothwell40cd3a42007-05-01 13:54:02 +10001061 bidp = of_get_property(np, "AAPL,bus-id", NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001062 pmif->aapl_bus_id = bidp ? *bidp : 0;
1063
Linus Torvalds1da177e2005-04-16 15:20:36 -07001064 /* On Kauai-type controllers, we make sure the FCR is correct */
1065 if (pmif->kauai_fcr)
1066 writel(KAUAI_FCR_UATA_MAGIC |
1067 KAUAI_FCR_UATA_RESET_N |
1068 KAUAI_FCR_UATA_ENABLE, pmif->kauai_fcr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001069
1070 /* Make sure we have sane timings */
1071 sanitize_timings(pmif);
1072
Benjamin Herrenschmidtd58b0c32009-12-01 14:36:28 +00001073 /* If we are on a media bay, wait for it to settle and lock it */
1074 if (pmif->mdev)
1075 lock_media_bay(pmif->mdev->media_bay);
Benjamin Herrenschmidt98427272008-07-28 11:29:56 +10001076
Benjamin Herrenschmidtd58b0c32009-12-01 14:36:28 +00001077 host = ide_host_alloc(&d, hws, 1);
1078 if (host == NULL) {
1079 rc = -ENOMEM;
1080 goto bail;
1081 }
1082 hwif = pmif->hwif = host->ports[0];
1083
1084 if (on_media_bay(pmif)) {
1085 /* Fixup bus ID for media bay */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001086 if (!bidp)
1087 pmif->aapl_bus_id = 1;
1088 } else if (pmif->kind == controller_ohare) {
1089 /* The code below is having trouble on some ohare machines
1090 * (timing related ?). Until I can put my hand on one of these
1091 * units, I keep the old way
1092 */
1093 ppc_md.feature_call(PMAC_FTR_IDE_ENABLE, np, 0, 1);
Benjamin Herrenschmidtd58b0c32009-12-01 14:36:28 +00001094 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001095 /* This is necessary to enable IDE when net-booting */
1096 ppc_md.feature_call(PMAC_FTR_IDE_RESET, np, pmif->aapl_bus_id, 1);
1097 ppc_md.feature_call(PMAC_FTR_IDE_ENABLE, np, pmif->aapl_bus_id, 1);
1098 msleep(10);
1099 ppc_md.feature_call(PMAC_FTR_IDE_RESET, np, pmif->aapl_bus_id, 0);
1100 msleep(jiffies_to_msecs(IDE_WAKEUP_DELAY));
1101 }
1102
Bartlomiej Zolnierkiewiczb36ba532008-07-23 19:55:49 +02001103 printk(KERN_INFO DRV_NAME ": Found Apple %s controller (%s), "
Benjamin Herrenschmidtd58b0c32009-12-01 14:36:28 +00001104 "bus ID %d%s, irq %d\n", model_name[pmif->kind],
1105 pmif->mdev ? "macio" : "PCI", pmif->aapl_bus_id,
1106 on_media_bay(pmif) ? " (mediabay)" : "", hw->irq);
Bartlomiej Zolnierkiewiczb36ba532008-07-23 19:55:49 +02001107
Benjamin Herrenschmidt98427272008-07-28 11:29:56 +10001108 rc = ide_host_register(host, &d, hws);
Benjamin Herrenschmidtd58b0c32009-12-01 14:36:28 +00001109 if (rc)
1110 pmif->hwif = NULL;
Bartlomiej Zolnierkiewicz5cbf79c2007-05-10 00:01:11 +02001111
Benjamin Herrenschmidtd58b0c32009-12-01 14:36:28 +00001112 if (pmif->mdev)
1113 unlock_media_bay(pmif->mdev->media_bay);
1114
1115 bail:
1116 if (rc && host)
1117 ide_host_free(host);
1118 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001119}
1120
Greg Kroah-Hartmanfe31edc2012-12-21 13:21:03 -08001121static void pmac_ide_init_ports(struct ide_hw *hw, unsigned long base)
Bartlomiej Zolnierkiewicz5c586662008-04-18 00:46:29 +02001122{
1123 int i;
1124
1125 for (i = 0; i < 8; ++i)
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +02001126 hw->io_ports_array[i] = base + i * 0x10;
1127
1128 hw->io_ports.ctl_addr = base + 0x160;
Bartlomiej Zolnierkiewicz5c586662008-04-18 00:46:29 +02001129}
1130
Linus Torvalds1da177e2005-04-16 15:20:36 -07001131/*
1132 * Attach to a macio probed interface
1133 */
Greg Kroah-Hartmanfe31edc2012-12-21 13:21:03 -08001134static int pmac_ide_macio_attach(struct macio_dev *mdev,
1135 const struct of_device_id *match)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001136{
1137 void __iomem *base;
1138 unsigned long regbase;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001139 pmac_ide_hwif_t *pmif;
Bartlomiej Zolnierkiewicz939b0f12008-04-26 17:36:33 +02001140 int irq, rc;
Bartlomiej Zolnierkiewicz9f36d312009-05-17 19:12:25 +02001141 struct ide_hw hw;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001142
Bartlomiej Zolnierkiewicz5297a3e2008-04-26 17:36:32 +02001143 pmif = kzalloc(sizeof(*pmif), GFP_KERNEL);
1144 if (pmif == NULL)
1145 return -ENOMEM;
1146
Benjamin Herrenschmidtcc5d0182005-12-13 18:01:21 +11001147 if (macio_resource_count(mdev) == 0) {
Bartlomiej Zolnierkiewicz939b0f12008-04-26 17:36:33 +02001148 printk(KERN_WARNING "ide-pmac: no address for %s\n",
Grant Likely61c7a082010-04-13 16:12:29 -07001149 mdev->ofdev.dev.of_node->full_name);
Bartlomiej Zolnierkiewicz5297a3e2008-04-26 17:36:32 +02001150 rc = -ENXIO;
1151 goto out_free_pmif;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001152 }
1153
1154 /* Request memory resource for IO ports */
1155 if (macio_request_resource(mdev, 0, "ide-pmac (ports)")) {
Bartlomiej Zolnierkiewicz939b0f12008-04-26 17:36:33 +02001156 printk(KERN_ERR "ide-pmac: can't request MMIO resource for "
Grant Likely61c7a082010-04-13 16:12:29 -07001157 "%s!\n", mdev->ofdev.dev.of_node->full_name);
Bartlomiej Zolnierkiewicz5297a3e2008-04-26 17:36:32 +02001158 rc = -EBUSY;
1159 goto out_free_pmif;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001160 }
1161
1162 /* XXX This is bogus. Should be fixed in the registry by checking
1163 * the kind of host interrupt controller, a bit like gatwick
1164 * fixes in irq.c. That works well enough for the single case
1165 * where that happens though...
1166 */
1167 if (macio_irq_count(mdev) == 0) {
Bartlomiej Zolnierkiewicz939b0f12008-04-26 17:36:33 +02001168 printk(KERN_WARNING "ide-pmac: no intrs for device %s, using "
Grant Likely61c7a082010-04-13 16:12:29 -07001169 "13\n", mdev->ofdev.dev.of_node->full_name);
Benjamin Herrenschmidt69917c22006-09-22 12:56:30 +10001170 irq = irq_create_mapping(NULL, 13);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001171 } else
1172 irq = macio_irq(mdev, 0);
1173
1174 base = ioremap(macio_resource_start(mdev, 0), 0x400);
1175 regbase = (unsigned long) base;
1176
Linus Torvalds1da177e2005-04-16 15:20:36 -07001177 pmif->mdev = mdev;
Grant Likely61c7a082010-04-13 16:12:29 -07001178 pmif->node = mdev->ofdev.dev.of_node;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001179 pmif->regbase = regbase;
1180 pmif->irq = irq;
1181 pmif->kauai_fcr = NULL;
Bartlomiej Zolnierkiewicz53846572008-12-08 17:52:05 +01001182
Linus Torvalds1da177e2005-04-16 15:20:36 -07001183 if (macio_resource_count(mdev) >= 2) {
1184 if (macio_request_resource(mdev, 1, "ide-pmac (dma)"))
Bartlomiej Zolnierkiewicz939b0f12008-04-26 17:36:33 +02001185 printk(KERN_WARNING "ide-pmac: can't request DMA "
1186 "resource for %s!\n",
Grant Likely61c7a082010-04-13 16:12:29 -07001187 mdev->ofdev.dev.of_node->full_name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001188 else
1189 pmif->dma_regs = ioremap(macio_resource_start(mdev, 1), 0x1000);
1190 } else
1191 pmif->dma_regs = NULL;
Bartlomiej Zolnierkiewicz53846572008-12-08 17:52:05 +01001192
Bartlomiej Zolnierkiewicz7b8797a2008-07-23 19:55:48 +02001193 dev_set_drvdata(&mdev->ofdev.dev, pmif);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001194
Bartlomiej Zolnierkiewicz57c802e2008-01-26 20:13:05 +01001195 memset(&hw, 0, sizeof(hw));
Bartlomiej Zolnierkiewicz5c586662008-04-18 00:46:29 +02001196 pmac_ide_init_ports(&hw, pmif->regbase);
Bartlomiej Zolnierkiewicz57c802e2008-01-26 20:13:05 +01001197 hw.irq = irq;
Bartlomiej Zolnierkiewiczc56c5642008-07-16 20:33:40 +02001198 hw.dev = &mdev->bus->pdev->dev;
1199 hw.parent = &mdev->ofdev.dev;
Bartlomiej Zolnierkiewicz57c802e2008-01-26 20:13:05 +01001200
Bartlomiej Zolnierkiewiczb36ba532008-07-23 19:55:49 +02001201 rc = pmac_ide_setup_device(pmif, &hw);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001202 if (rc != 0) {
1203 /* The inteface is released to the common IDE layer */
1204 dev_set_drvdata(&mdev->ofdev.dev, NULL);
1205 iounmap(base);
Bartlomiej Zolnierkiewiczed908fa2008-02-01 23:09:32 +01001206 if (pmif->dma_regs) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001207 iounmap(pmif->dma_regs);
Bartlomiej Zolnierkiewiczed908fa2008-02-01 23:09:32 +01001208 macio_release_resource(mdev, 1);
1209 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001210 macio_release_resource(mdev, 0);
Bartlomiej Zolnierkiewicz5297a3e2008-04-26 17:36:32 +02001211 kfree(pmif);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001212 }
1213
1214 return rc;
Bartlomiej Zolnierkiewicz5297a3e2008-04-26 17:36:32 +02001215
1216out_free_pmif:
1217 kfree(pmif);
1218 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001219}
1220
1221static int
David Brownell8b4b8a22006-08-14 23:11:03 -07001222pmac_ide_macio_suspend(struct macio_dev *mdev, pm_message_t mesg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001223{
Jingoo Han58e48be2013-09-09 14:41:14 +09001224 pmac_ide_hwif_t *pmif = dev_get_drvdata(&mdev->ofdev.dev);
Bartlomiej Zolnierkiewicz7b8797a2008-07-23 19:55:48 +02001225 int rc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001226
David Brownell8b4b8a22006-08-14 23:11:03 -07001227 if (mesg.event != mdev->ofdev.dev.power.power_state.event
Rafael J. Wysocki3a2d5b72008-02-23 19:13:25 +01001228 && (mesg.event & PM_EVENT_SLEEP)) {
Bartlomiej Zolnierkiewicz7b8797a2008-07-23 19:55:48 +02001229 rc = pmac_ide_do_suspend(pmif);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001230 if (rc == 0)
David Brownell8b4b8a22006-08-14 23:11:03 -07001231 mdev->ofdev.dev.power.power_state = mesg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001232 }
1233
1234 return rc;
1235}
1236
1237static int
1238pmac_ide_macio_resume(struct macio_dev *mdev)
1239{
Jingoo Han58e48be2013-09-09 14:41:14 +09001240 pmac_ide_hwif_t *pmif = dev_get_drvdata(&mdev->ofdev.dev);
Bartlomiej Zolnierkiewicz7b8797a2008-07-23 19:55:48 +02001241 int rc = 0;
1242
Pavel Machekca078ba2005-09-03 15:56:57 -07001243 if (mdev->ofdev.dev.power.power_state.event != PM_EVENT_ON) {
Bartlomiej Zolnierkiewicz7b8797a2008-07-23 19:55:48 +02001244 rc = pmac_ide_do_resume(pmif);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001245 if (rc == 0)
Pavel Machek829ca9a2005-09-03 15:56:56 -07001246 mdev->ofdev.dev.power.power_state = PMSG_ON;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001247 }
1248
1249 return rc;
1250}
1251
1252/*
1253 * Attach to a PCI probed interface
1254 */
Greg Kroah-Hartmanfe31edc2012-12-21 13:21:03 -08001255static int pmac_ide_pci_attach(struct pci_dev *pdev,
1256 const struct pci_device_id *id)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001257{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001258 struct device_node *np;
1259 pmac_ide_hwif_t *pmif;
1260 void __iomem *base;
1261 unsigned long rbase, rlen;
Bartlomiej Zolnierkiewicz939b0f12008-04-26 17:36:33 +02001262 int rc;
Bartlomiej Zolnierkiewicz9f36d312009-05-17 19:12:25 +02001263 struct ide_hw hw;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001264
1265 np = pci_device_to_OF_node(pdev);
1266 if (np == NULL) {
1267 printk(KERN_ERR "ide-pmac: cannot find MacIO node for Kauai ATA interface\n");
1268 return -ENODEV;
1269 }
Bartlomiej Zolnierkiewicz5297a3e2008-04-26 17:36:32 +02001270
1271 pmif = kzalloc(sizeof(*pmif), GFP_KERNEL);
1272 if (pmif == NULL)
1273 return -ENOMEM;
1274
Linus Torvalds1da177e2005-04-16 15:20:36 -07001275 if (pci_enable_device(pdev)) {
Bartlomiej Zolnierkiewicz939b0f12008-04-26 17:36:33 +02001276 printk(KERN_WARNING "ide-pmac: Can't enable PCI device for "
1277 "%s\n", np->full_name);
Bartlomiej Zolnierkiewicz5297a3e2008-04-26 17:36:32 +02001278 rc = -ENXIO;
1279 goto out_free_pmif;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001280 }
1281 pci_set_master(pdev);
1282
1283 if (pci_request_regions(pdev, "Kauai ATA")) {
Bartlomiej Zolnierkiewicz939b0f12008-04-26 17:36:33 +02001284 printk(KERN_ERR "ide-pmac: Cannot obtain PCI resources for "
1285 "%s\n", np->full_name);
Bartlomiej Zolnierkiewicz5297a3e2008-04-26 17:36:32 +02001286 rc = -ENXIO;
1287 goto out_free_pmif;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001288 }
1289
Linus Torvalds1da177e2005-04-16 15:20:36 -07001290 pmif->mdev = NULL;
1291 pmif->node = np;
1292
1293 rbase = pci_resource_start(pdev, 0);
1294 rlen = pci_resource_len(pdev, 0);
1295
1296 base = ioremap(rbase, rlen);
1297 pmif->regbase = (unsigned long) base + 0x2000;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001298 pmif->dma_regs = base + 0x1000;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001299 pmif->kauai_fcr = base;
1300 pmif->irq = pdev->irq;
1301
Bartlomiej Zolnierkiewicz7b8797a2008-07-23 19:55:48 +02001302 pci_set_drvdata(pdev, pmif);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001303
Bartlomiej Zolnierkiewicz57c802e2008-01-26 20:13:05 +01001304 memset(&hw, 0, sizeof(hw));
Bartlomiej Zolnierkiewicz5c586662008-04-18 00:46:29 +02001305 pmac_ide_init_ports(&hw, pmif->regbase);
Bartlomiej Zolnierkiewicz57c802e2008-01-26 20:13:05 +01001306 hw.irq = pdev->irq;
1307 hw.dev = &pdev->dev;
1308
Bartlomiej Zolnierkiewiczb36ba532008-07-23 19:55:49 +02001309 rc = pmac_ide_setup_device(pmif, &hw);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001310 if (rc != 0) {
1311 /* The inteface is released to the common IDE layer */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001312 iounmap(base);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001313 pci_release_regions(pdev);
Bartlomiej Zolnierkiewicz5297a3e2008-04-26 17:36:32 +02001314 kfree(pmif);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001315 }
1316
1317 return rc;
Bartlomiej Zolnierkiewicz5297a3e2008-04-26 17:36:32 +02001318
1319out_free_pmif:
1320 kfree(pmif);
1321 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001322}
1323
1324static int
David Brownell8b4b8a22006-08-14 23:11:03 -07001325pmac_ide_pci_suspend(struct pci_dev *pdev, pm_message_t mesg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001326{
Joe Perchesf2ba70a2010-11-22 11:38:08 -08001327 pmac_ide_hwif_t *pmif = pci_get_drvdata(pdev);
Bartlomiej Zolnierkiewicz7b8797a2008-07-23 19:55:48 +02001328 int rc = 0;
1329
David Brownell8b4b8a22006-08-14 23:11:03 -07001330 if (mesg.event != pdev->dev.power.power_state.event
Rafael J. Wysocki3a2d5b72008-02-23 19:13:25 +01001331 && (mesg.event & PM_EVENT_SLEEP)) {
Bartlomiej Zolnierkiewicz7b8797a2008-07-23 19:55:48 +02001332 rc = pmac_ide_do_suspend(pmif);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001333 if (rc == 0)
David Brownell8b4b8a22006-08-14 23:11:03 -07001334 pdev->dev.power.power_state = mesg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001335 }
1336
1337 return rc;
1338}
1339
1340static int
1341pmac_ide_pci_resume(struct pci_dev *pdev)
1342{
Joe Perchesf2ba70a2010-11-22 11:38:08 -08001343 pmac_ide_hwif_t *pmif = pci_get_drvdata(pdev);
Bartlomiej Zolnierkiewicz7b8797a2008-07-23 19:55:48 +02001344 int rc = 0;
1345
Pavel Machekca078ba2005-09-03 15:56:57 -07001346 if (pdev->dev.power.power_state.event != PM_EVENT_ON) {
Bartlomiej Zolnierkiewicz7b8797a2008-07-23 19:55:48 +02001347 rc = pmac_ide_do_resume(pmif);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001348 if (rc == 0)
Pavel Machek829ca9a2005-09-03 15:56:56 -07001349 pdev->dev.power.power_state = PMSG_ON;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001350 }
1351
1352 return rc;
1353}
1354
Benjamin Herrenschmidtd58b0c32009-12-01 14:36:28 +00001355#ifdef CONFIG_PMAC_MEDIABAY
1356static void pmac_ide_macio_mb_event(struct macio_dev* mdev, int mb_state)
1357{
Jingoo Han58e48be2013-09-09 14:41:14 +09001358 pmac_ide_hwif_t *pmif = dev_get_drvdata(&mdev->ofdev.dev);
Benjamin Herrenschmidtd58b0c32009-12-01 14:36:28 +00001359
1360 switch(mb_state) {
1361 case MB_CD:
1362 if (!pmif->hwif->present)
1363 ide_port_scan(pmif->hwif);
1364 break;
1365 default:
1366 if (pmif->hwif->present)
1367 ide_port_unregister_devices(pmif->hwif);
1368 }
1369}
1370#endif /* CONFIG_PMAC_MEDIABAY */
1371
1372
Jeff Mahoney5e655772005-07-06 15:44:41 -04001373static struct of_device_id pmac_ide_macio_match[] =
Linus Torvalds1da177e2005-04-16 15:20:36 -07001374{
1375 {
1376 .name = "IDE",
Linus Torvalds1da177e2005-04-16 15:20:36 -07001377 },
1378 {
1379 .name = "ATA",
Linus Torvalds1da177e2005-04-16 15:20:36 -07001380 },
1381 {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001382 .type = "ide",
Linus Torvalds1da177e2005-04-16 15:20:36 -07001383 },
1384 {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001385 .type = "ata",
Linus Torvalds1da177e2005-04-16 15:20:36 -07001386 },
1387 {},
1388};
1389
1390static struct macio_driver pmac_ide_macio_driver =
1391{
Benjamin Herrenschmidtc2cdf6a2010-06-02 17:09:18 +10001392 .driver = {
1393 .name = "ide-pmac",
1394 .owner = THIS_MODULE,
1395 .of_match_table = pmac_ide_macio_match,
1396 },
Linus Torvalds1da177e2005-04-16 15:20:36 -07001397 .probe = pmac_ide_macio_attach,
1398 .suspend = pmac_ide_macio_suspend,
1399 .resume = pmac_ide_macio_resume,
Benjamin Herrenschmidtd58b0c32009-12-01 14:36:28 +00001400#ifdef CONFIG_PMAC_MEDIABAY
1401 .mediabay_event = pmac_ide_macio_mb_event,
1402#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001403};
1404
Bartlomiej Zolnierkiewicz9cbcc5e2007-10-16 22:29:56 +02001405static const struct pci_device_id pmac_ide_pci_match[] = {
1406 { PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_UNI_N_ATA), 0 },
1407 { PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_IPID_ATA100), 0 },
1408 { PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_K2_ATA100), 0 },
1409 { PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_SH_ATA), 0 },
1410 { PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_IPID2_ATA), 0 },
Benjamin Herrenschmidt71e4eda2007-10-06 18:52:27 +10001411 {},
Linus Torvalds1da177e2005-04-16 15:20:36 -07001412};
1413
1414static struct pci_driver pmac_ide_pci_driver = {
1415 .name = "ide-pmac",
1416 .id_table = pmac_ide_pci_match,
1417 .probe = pmac_ide_pci_attach,
1418 .suspend = pmac_ide_pci_suspend,
1419 .resume = pmac_ide_pci_resume,
1420};
1421MODULE_DEVICE_TABLE(pci, pmac_ide_pci_match);
1422
Andrew Morton9e5755b2007-03-03 17:48:54 +01001423int __init pmac_ide_probe(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001424{
Andrew Morton9e5755b2007-03-03 17:48:54 +01001425 int error;
1426
Benjamin Herrenschmidte8222502006-03-28 23:15:54 +11001427 if (!machine_is(powermac))
Andrew Morton9e5755b2007-03-03 17:48:54 +01001428 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001429
1430#ifdef CONFIG_BLK_DEV_IDE_PMAC_ATA100FIRST
Andrew Morton9e5755b2007-03-03 17:48:54 +01001431 error = pci_register_driver(&pmac_ide_pci_driver);
1432 if (error)
1433 goto out;
1434 error = macio_register_driver(&pmac_ide_macio_driver);
1435 if (error) {
1436 pci_unregister_driver(&pmac_ide_pci_driver);
1437 goto out;
1438 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001439#else
Andrew Morton9e5755b2007-03-03 17:48:54 +01001440 error = macio_register_driver(&pmac_ide_macio_driver);
1441 if (error)
1442 goto out;
1443 error = pci_register_driver(&pmac_ide_pci_driver);
1444 if (error) {
1445 macio_unregister_driver(&pmac_ide_macio_driver);
1446 goto out;
1447 }
Benjamin Herrenschmidt1beb6a72005-12-14 13:10:10 +11001448#endif
Andrew Morton9e5755b2007-03-03 17:48:54 +01001449out:
1450 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001451}
1452
Linus Torvalds1da177e2005-04-16 15:20:36 -07001453/*
1454 * pmac_ide_build_dmatable builds the DBDMA command list
1455 * for a transfer and sets the DBDMA channel to point to it.
1456 */
Bartlomiej Zolnierkiewicz229816942009-03-27 12:46:46 +01001457static int pmac_ide_build_dmatable(ide_drive_t *drive, struct ide_cmd *cmd)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001458{
Bartlomiej Zolnierkiewicz7b8797a2008-07-23 19:55:48 +02001459 ide_hwif_t *hwif = drive->hwif;
Jingoo Han58e48be2013-09-09 14:41:14 +09001460 pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001461 struct dbdma_cmd *table;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001462 volatile struct dbdma_regs __iomem *dma = pmif->dma_regs;
1463 struct scatterlist *sg;
Bartlomiej Zolnierkiewicz229816942009-03-27 12:46:46 +01001464 int wr = !!(cmd->tf_flags & IDE_TFLAG_WRITE);
1465 int i = cmd->sg_nents, count = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001466
1467 /* DMA table is already aligned */
1468 table = (struct dbdma_cmd *) pmif->dma_table_cpu;
1469
1470 /* Make sure DMA controller is stopped (necessary ?) */
1471 writel((RUN|PAUSE|FLUSH|WAKE|DEAD) << 16, &dma->control);
1472 while (readl(&dma->status) & RUN)
1473 udelay(1);
1474
Linus Torvalds1da177e2005-04-16 15:20:36 -07001475 /* Build DBDMA commands list */
1476 sg = hwif->sg_table;
1477 while (i && sg_dma_len(sg)) {
1478 u32 cur_addr;
1479 u32 cur_len;
1480
1481 cur_addr = sg_dma_address(sg);
1482 cur_len = sg_dma_len(sg);
1483
1484 if (pmif->broken_dma && cur_addr & (L1_CACHE_BYTES - 1)) {
1485 if (pmif->broken_dma_warn == 0) {
Joe Perchesaca38a52007-11-27 21:35:55 +01001486 printk(KERN_WARNING "%s: DMA on non aligned address, "
Linus Torvalds1da177e2005-04-16 15:20:36 -07001487 "switching to PIO on Ohare chipset\n", drive->name);
1488 pmif->broken_dma_warn = 1;
1489 }
Bartlomiej Zolnierkiewicz11998b32009-03-31 20:15:21 +02001490 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001491 }
1492 while (cur_len) {
1493 unsigned int tc = (cur_len < 0xfe00)? cur_len: 0xfe00;
1494
1495 if (count++ >= MAX_DCMDS) {
1496 printk(KERN_WARNING "%s: DMA table too small\n",
1497 drive->name);
Bartlomiej Zolnierkiewicz11998b32009-03-31 20:15:21 +02001498 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001499 }
David Gibsonf5718722015-02-03 16:36:21 +11001500 table->command = cpu_to_le16(wr? OUTPUT_MORE: INPUT_MORE);
1501 table->req_count = cpu_to_le16(tc);
1502 table->phy_addr = cpu_to_le32(cur_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001503 table->cmd_dep = 0;
1504 table->xfer_status = 0;
1505 table->res_count = 0;
1506 cur_addr += tc;
1507 cur_len -= tc;
1508 ++table;
1509 }
Jens Axboe55c16a72007-07-25 08:13:56 +02001510 sg = sg_next(sg);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001511 i--;
1512 }
1513
1514 /* convert the last command to an input/output last command */
1515 if (count) {
David Gibsonf5718722015-02-03 16:36:21 +11001516 table[-1].command = cpu_to_le16(wr? OUTPUT_LAST: INPUT_LAST);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001517 /* add the stop command to the end of the list */
1518 memset(table, 0, sizeof(struct dbdma_cmd));
David Gibsonf5718722015-02-03 16:36:21 +11001519 table->command = cpu_to_le16(DBDMA_STOP);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001520 mb();
1521 writel(hwif->dmatable_dma, &dma->cmdptr);
1522 return 1;
1523 }
1524
1525 printk(KERN_DEBUG "%s: empty DMA table?\n", drive->name);
Bartlomiej Zolnierkiewiczf6fb7862008-02-01 23:09:31 +01001526
Linus Torvalds1da177e2005-04-16 15:20:36 -07001527 return 0; /* revert to PIO for this request */
1528}
1529
Linus Torvalds1da177e2005-04-16 15:20:36 -07001530/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001531 * Prepare a DMA transfer. We build the DMA table, adjust the timings for
1532 * a read on KeyLargo ATA/66 and mark us as waiting for DMA completion
1533 */
Bartlomiej Zolnierkiewicz229816942009-03-27 12:46:46 +01001534static int pmac_ide_dma_setup(ide_drive_t *drive, struct ide_cmd *cmd)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001535{
Bartlomiej Zolnierkiewicz898ec222009-01-06 17:20:52 +01001536 ide_hwif_t *hwif = drive->hwif;
Jingoo Han58e48be2013-09-09 14:41:14 +09001537 pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
Bartlomiej Zolnierkiewicz9055ba32008-10-13 21:39:45 +02001538 u8 unit = drive->dn & 1, ata4 = (pmif->kind == controller_kl_ata4);
Bartlomiej Zolnierkiewicz229816942009-03-27 12:46:46 +01001539 u8 write = !!(cmd->tf_flags & IDE_TFLAG_WRITE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001540
Bartlomiej Zolnierkiewicz11998b32009-03-31 20:15:21 +02001541 if (pmac_ide_build_dmatable(drive, cmd) == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001542 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001543
1544 /* Apple adds 60ns to wrDataSetup on reads */
1545 if (ata4 && (pmif->timings[unit] & TR_66_UDMA_EN)) {
Bartlomiej Zolnierkiewicz229816942009-03-27 12:46:46 +01001546 writel(pmif->timings[unit] + (write ? 0 : 0x00800000UL),
Linus Torvalds1da177e2005-04-16 15:20:36 -07001547 PMAC_IDE_REG(IDE_TIMING_CONFIG));
1548 (void)readl(PMAC_IDE_REG(IDE_TIMING_CONFIG));
1549 }
1550
Linus Torvalds1da177e2005-04-16 15:20:36 -07001551 return 0;
1552}
1553
Linus Torvalds1da177e2005-04-16 15:20:36 -07001554/*
1555 * Kick the DMA controller into life after the DMA command has been issued
1556 * to the drive.
1557 */
Jon Loeligeraacaf9b2005-09-17 10:36:54 -05001558static void
Linus Torvalds1da177e2005-04-16 15:20:36 -07001559pmac_ide_dma_start(ide_drive_t *drive)
1560{
Bartlomiej Zolnierkiewicz7b8797a2008-07-23 19:55:48 +02001561 ide_hwif_t *hwif = drive->hwif;
Jingoo Han58e48be2013-09-09 14:41:14 +09001562 pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001563 volatile struct dbdma_regs __iomem *dma;
1564
1565 dma = pmif->dma_regs;
1566
1567 writel((RUN << 16) | RUN, &dma->control);
1568 /* Make sure it gets to the controller right now */
1569 (void)readl(&dma->control);
1570}
1571
1572/*
1573 * After a DMA transfer, make sure the controller is stopped
1574 */
Jon Loeligeraacaf9b2005-09-17 10:36:54 -05001575static int
Linus Torvalds1da177e2005-04-16 15:20:36 -07001576pmac_ide_dma_end (ide_drive_t *drive)
1577{
Bartlomiej Zolnierkiewicz7b8797a2008-07-23 19:55:48 +02001578 ide_hwif_t *hwif = drive->hwif;
Jingoo Han58e48be2013-09-09 14:41:14 +09001579 pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
Bartlomiej Zolnierkiewicz9055ba32008-10-13 21:39:45 +02001580 volatile struct dbdma_regs __iomem *dma = pmif->dma_regs;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001581 u32 dstat;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001582
Linus Torvalds1da177e2005-04-16 15:20:36 -07001583 dstat = readl(&dma->status);
1584 writel(((RUN|WAKE|DEAD) << 16), &dma->control);
Bartlomiej Zolnierkiewiczf5e0b5e2008-10-13 21:39:45 +02001585
Linus Torvalds1da177e2005-04-16 15:20:36 -07001586 /* verify good dma status. we don't check for ACTIVE beeing 0. We should...
1587 * in theory, but with ATAPI decices doing buffer underruns, that would
1588 * cause us to disable DMA, which isn't what we want
1589 */
1590 return (dstat & (RUN|DEAD)) != RUN;
1591}
1592
1593/*
1594 * Check out that the interrupt we got was for us. We can't always know this
1595 * for sure with those Apple interfaces (well, we could on the recent ones but
1596 * that's not implemented yet), on the other hand, we don't have shared interrupts
1597 * so it's not really a problem
1598 */
Jon Loeligeraacaf9b2005-09-17 10:36:54 -05001599static int
Linus Torvalds1da177e2005-04-16 15:20:36 -07001600pmac_ide_dma_test_irq (ide_drive_t *drive)
1601{
Bartlomiej Zolnierkiewicz7b8797a2008-07-23 19:55:48 +02001602 ide_hwif_t *hwif = drive->hwif;
Jingoo Han58e48be2013-09-09 14:41:14 +09001603 pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
Bartlomiej Zolnierkiewicz9055ba32008-10-13 21:39:45 +02001604 volatile struct dbdma_regs __iomem *dma = pmif->dma_regs;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001605 unsigned long status, timeout;
1606
Linus Torvalds1da177e2005-04-16 15:20:36 -07001607 /* We have to things to deal with here:
1608 *
1609 * - The dbdma won't stop if the command was started
1610 * but completed with an error without transferring all
1611 * datas. This happens when bad blocks are met during
1612 * a multi-block transfer.
1613 *
1614 * - The dbdma fifo hasn't yet finished flushing to
1615 * to system memory when the disk interrupt occurs.
1616 *
1617 */
1618
1619 /* If ACTIVE is cleared, the STOP command have passed and
1620 * transfer is complete.
1621 */
1622 status = readl(&dma->status);
1623 if (!(status & ACTIVE))
1624 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001625
1626 /* If dbdma didn't execute the STOP command yet, the
1627 * active bit is still set. We consider that we aren't
1628 * sharing interrupts (which is hopefully the case with
1629 * those controllers) and so we just try to flush the
1630 * channel for pending data in the fifo
1631 */
1632 udelay(1);
1633 writel((FLUSH << 16) | FLUSH, &dma->control);
1634 timeout = 0;
1635 for (;;) {
1636 udelay(1);
1637 status = readl(&dma->status);
1638 if ((status & FLUSH) == 0)
1639 break;
1640 if (++timeout > 100) {
Joe Perchesb1681c52010-02-03 18:44:44 -08001641 printk(KERN_WARNING "ide%d, ide_dma_test_irq timeout flushing channel\n",
1642 hwif->index);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001643 break;
1644 }
1645 }
1646 return 1;
1647}
1648
Bartlomiej Zolnierkiewicz15ce9262008-01-26 20:13:03 +01001649static void pmac_ide_dma_host_set(ide_drive_t *drive, int on)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001650{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001651}
1652
Sergei Shtylyov841d2a92007-07-09 23:17:54 +02001653static void
1654pmac_ide_dma_lost_irq (ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001655{
Bartlomiej Zolnierkiewicz7b8797a2008-07-23 19:55:48 +02001656 ide_hwif_t *hwif = drive->hwif;
Jingoo Han58e48be2013-09-09 14:41:14 +09001657 pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
Bartlomiej Zolnierkiewicz9055ba32008-10-13 21:39:45 +02001658 volatile struct dbdma_regs __iomem *dma = pmif->dma_regs;
1659 unsigned long status = readl(&dma->status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001660
Linus Torvalds1da177e2005-04-16 15:20:36 -07001661 printk(KERN_ERR "ide-pmac lost interrupt, dma status: %lx\n", status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001662}
1663
Bartlomiej Zolnierkiewiczf37afda2008-04-26 22:25:24 +02001664static const struct ide_dma_ops pmac_dma_ops = {
Bartlomiej Zolnierkiewicz5e37bdc2008-04-26 22:25:24 +02001665 .dma_host_set = pmac_ide_dma_host_set,
1666 .dma_setup = pmac_ide_dma_setup,
Bartlomiej Zolnierkiewicz5e37bdc2008-04-26 22:25:24 +02001667 .dma_start = pmac_ide_dma_start,
1668 .dma_end = pmac_ide_dma_end,
1669 .dma_test_irq = pmac_ide_dma_test_irq,
Bartlomiej Zolnierkiewicz5e37bdc2008-04-26 22:25:24 +02001670 .dma_lost_irq = pmac_ide_dma_lost_irq,
1671};
1672
Linus Torvalds1da177e2005-04-16 15:20:36 -07001673/*
1674 * Allocate the data structures needed for using DMA with an interface
1675 * and fill the proper list of functions pointers
1676 */
Greg Kroah-Hartmanfe31edc2012-12-21 13:21:03 -08001677static int pmac_ide_init_dma(ide_hwif_t *hwif, const struct ide_port_info *d)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001678{
Jingoo Han58e48be2013-09-09 14:41:14 +09001679 pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
Bartlomiej Zolnierkiewicz36501652008-02-01 23:09:31 +01001680 struct pci_dev *dev = to_pci_dev(hwif->dev);
1681
Linus Torvalds1da177e2005-04-16 15:20:36 -07001682 /* We won't need pci_dev if we switch to generic consistent
1683 * DMA routines ...
1684 */
Bartlomiej Zolnierkiewicz0d071922008-04-26 22:25:22 +02001685 if (dev == NULL || pmif->dma_regs == 0)
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001686 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001687 /*
1688 * Allocate space for the DBDMA commands.
1689 * The +2 is +1 for the stop command and +1 to allow for
1690 * aligning the start address to a multiple of 16 bytes.
1691 */
Quentin Lambertd681f112015-04-13 10:26:53 +02001692 pmif->dma_table_cpu = dma_alloc_coherent(&dev->dev,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001693 (MAX_DCMDS + 2) * sizeof(struct dbdma_cmd),
Quentin Lambertd681f112015-04-13 10:26:53 +02001694 &hwif->dmatable_dma, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001695 if (pmif->dma_table_cpu == NULL) {
1696 printk(KERN_ERR "%s: unable to allocate DMA command list\n",
1697 hwif->name);
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001698 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001699 }
1700
Bartlomiej Zolnierkiewicz4f52a322008-01-26 20:13:08 +01001701 hwif->sg_max_nents = MAX_DCMDS;
1702
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001703 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001704}
Bartlomiej Zolnierkiewiczade2daf2008-01-26 20:13:07 +01001705
1706module_init(pmac_ide_probe);
Adrian Bunkde9facb2008-04-02 21:22:03 +02001707
1708MODULE_LICENSE("GPL");