projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
ide: make void and rename ide_dma_lostirq() method
[deliverable/linux.git] / drivers / ide / mips / au1xxx-ide.c
1 /*
2 * linux/drivers/ide/mips/au1xxx-ide.c version 01.30.00 Aug. 02 2005
3 *
4 * BRIEF MODULE DESCRIPTION
5 * AMD Alchemy Au1xxx IDE interface routines over the Static Bus
6 *
7 * Copyright (c) 2003-2005 AMD, Personal Connectivity Solutions
8 *
9 * This program is free software; you can redistribute it and/or modify it under
10 * the terms of the GNU General Public License as published by the Free Software
11 * Foundation; either version 2 of the License, or (at your option) any later
12 * version.
13 *
14 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
15 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
16 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
23 * POSSIBILITY OF SUCH DAMAGE.
24 *
25 * You should have received a copy of the GNU General Public License along with
26 * this program; if not, write to the Free Software Foundation, Inc.,
27 * 675 Mass Ave, Cambridge, MA 02139, USA.
28 *
29 * Note: for more information, please refer "AMD Alchemy Au1200/Au1550 IDE
30 * Interface and Linux Device Driver" Application Note.
31 */
32 #include <linux/types.h>
33 #include <linux/module.h>
34 #include <linux/kernel.h>
35 #include <linux/delay.h>
36 #include <linux/platform_device.h>
37
38 #include <linux/init.h>
39 #include <linux/ide.h>
40 #include <linux/sysdev.h>
41
42 #include <linux/dma-mapping.h>
43
44 #include "ide-timing.h"
45
46 #include <asm/io.h>
47 #include <asm/mach-au1x00/au1xxx.h>
48 #include <asm/mach-au1x00/au1xxx_dbdma.h>
49
50 #include <asm/mach-au1x00/au1xxx_ide.h>
51
52 #define DRV_NAME "au1200-ide"
53 #define DRV_VERSION "1.0"
54 #define DRV_AUTHOR "Enrico Walther <enrico.walther@amd.com> / Pete Popov <ppopov@embeddedalley.com>"
55
56 /* enable the burstmode in the dbdma */
57 #define IDE_AU1XXX_BURSTMODE 1
58
59 static _auide_hwif auide_hwif;
60 static int dbdma_init_done;
61
62 #if defined(CONFIG_BLK_DEV_IDE_AU1XXX_PIO_DBDMA)
63
64 void auide_insw(unsigned long port, void *addr, u32 count)
65 {
66 _auide_hwif *ahwif = &auide_hwif;
67 chan_tab_t *ctp;
68 au1x_ddma_desc_t *dp;
69
70 if(!put_dest_flags(ahwif->rx_chan, (void*)addr, count << 1,
71 DDMA_FLAGS_NOIE)) {
72 printk(KERN_ERR "%s failed %d\n", __FUNCTION__, __LINE__);
73 return;
74 }
75 ctp = *((chan_tab_t **)ahwif->rx_chan);
76 dp = ctp->cur_ptr;
77 while (dp->dscr_cmd0 & DSCR_CMD0_V)
78 ;
79 ctp->cur_ptr = au1xxx_ddma_get_nextptr_virt(dp);
80 }
81
82 void auide_outsw(unsigned long port, void *addr, u32 count)
83 {
84 _auide_hwif *ahwif = &auide_hwif;
85 chan_tab_t *ctp;
86 au1x_ddma_desc_t *dp;
87
88 if(!put_source_flags(ahwif->tx_chan, (void*)addr,
89 count << 1, DDMA_FLAGS_NOIE)) {
90 printk(KERN_ERR "%s failed %d\n", __FUNCTION__, __LINE__);
91 return;
92 }
93 ctp = *((chan_tab_t **)ahwif->tx_chan);
94 dp = ctp->cur_ptr;
95 while (dp->dscr_cmd0 & DSCR_CMD0_V)
96 ;
97 ctp->cur_ptr = au1xxx_ddma_get_nextptr_virt(dp);
98 }
99
100 #endif
101
102 static void auide_tune_drive(ide_drive_t *drive, byte pio)
103 {
104 int mem_sttime;
105 int mem_stcfg;
106 u8 speed;
107
108 /* get the best pio mode for the drive */
109 pio = ide_get_best_pio_mode(drive, pio, 4, NULL);
110
111 printk(KERN_INFO "%s: setting Au1XXX IDE to PIO mode%d\n",
112 drive->name, pio);
113
114 mem_sttime = 0;
115 mem_stcfg = au_readl(MEM_STCFG2);
116
117 /* set pio mode! */
118 switch(pio) {
119 case 0:
120 mem_sttime = SBC_IDE_TIMING(PIO0);
121
122 /* set configuration for RCS2# */
123 mem_stcfg |= TS_MASK;
124 mem_stcfg &= ~TCSOE_MASK;
125 mem_stcfg &= ~TOECS_MASK;
126 mem_stcfg |= SBC_IDE_PIO0_TCSOE | SBC_IDE_PIO0_TOECS;
127 break;
128
129 case 1:
130 mem_sttime = SBC_IDE_TIMING(PIO1);
131
132 /* set configuration for RCS2# */
133 mem_stcfg |= TS_MASK;
134 mem_stcfg &= ~TCSOE_MASK;
135 mem_stcfg &= ~TOECS_MASK;
136 mem_stcfg |= SBC_IDE_PIO1_TCSOE | SBC_IDE_PIO1_TOECS;
137 break;
138
139 case 2:
140 mem_sttime = SBC_IDE_TIMING(PIO2);
141
142 /* set configuration for RCS2# */
143 mem_stcfg &= ~TS_MASK;
144 mem_stcfg &= ~TCSOE_MASK;
145 mem_stcfg &= ~TOECS_MASK;
146 mem_stcfg |= SBC_IDE_PIO2_TCSOE | SBC_IDE_PIO2_TOECS;
147 break;
148
149 case 3:
150 mem_sttime = SBC_IDE_TIMING(PIO3);
151
152 /* set configuration for RCS2# */
153 mem_stcfg &= ~TS_MASK;
154 mem_stcfg &= ~TCSOE_MASK;
155 mem_stcfg &= ~TOECS_MASK;
156 mem_stcfg |= SBC_IDE_PIO3_TCSOE | SBC_IDE_PIO3_TOECS;
157
158 break;
159
160 case 4:
161 mem_sttime = SBC_IDE_TIMING(PIO4);
162
163 /* set configuration for RCS2# */
164 mem_stcfg &= ~TS_MASK;
165 mem_stcfg &= ~TCSOE_MASK;
166 mem_stcfg &= ~TOECS_MASK;
167 mem_stcfg |= SBC_IDE_PIO4_TCSOE | SBC_IDE_PIO4_TOECS;
168 break;
169 }
170
171 au_writel(mem_sttime,MEM_STTIME2);
172 au_writel(mem_stcfg,MEM_STCFG2);
173
174 speed = pio + XFER_PIO_0;
175 ide_config_drive_speed(drive, speed);
176 }
177
178 static int auide_tune_chipset (ide_drive_t *drive, u8 speed)
179 {
180 int mem_sttime;
181 int mem_stcfg;
182
183 mem_sttime = 0;
184 mem_stcfg = au_readl(MEM_STCFG2);
185
186 if (speed >= XFER_PIO_0 && speed <= XFER_PIO_4) {
187 auide_tune_drive(drive, speed - XFER_PIO_0);
188 return 0;
189 }
190
191 switch(speed) {
192 #ifdef CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA
193 case XFER_MW_DMA_2:
194 mem_sttime = SBC_IDE_TIMING(MDMA2);
195
196 /* set configuration for RCS2# */
197 mem_stcfg &= ~TS_MASK;
198 mem_stcfg &= ~TCSOE_MASK;
199 mem_stcfg &= ~TOECS_MASK;
200 mem_stcfg |= SBC_IDE_MDMA2_TCSOE | SBC_IDE_MDMA2_TOECS;
201
202 break;
203 case XFER_MW_DMA_1:
204 mem_sttime = SBC_IDE_TIMING(MDMA1);
205
206 /* set configuration for RCS2# */
207 mem_stcfg &= ~TS_MASK;
208 mem_stcfg &= ~TCSOE_MASK;
209 mem_stcfg &= ~TOECS_MASK;
210 mem_stcfg |= SBC_IDE_MDMA1_TCSOE | SBC_IDE_MDMA1_TOECS;
211
212 break;
213 case XFER_MW_DMA_0:
214 mem_sttime = SBC_IDE_TIMING(MDMA0);
215
216 /* set configuration for RCS2# */
217 mem_stcfg |= TS_MASK;
218 mem_stcfg &= ~TCSOE_MASK;
219 mem_stcfg &= ~TOECS_MASK;
220 mem_stcfg |= SBC_IDE_MDMA0_TCSOE | SBC_IDE_MDMA0_TOECS;
221
222 break;
223 #endif
224 default:
225 return 1;
226 }
227
228 if (ide_config_drive_speed(drive, speed))
229 return 1;
230
231 au_writel(mem_sttime,MEM_STTIME2);
232 au_writel(mem_stcfg,MEM_STCFG2);
233
234 return 0;
235 }
236
237 /*
238 * Multi-Word DMA + DbDMA functions
239 */
240
241 #ifdef CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA
242
243 static int auide_build_sglist(ide_drive_t *drive, struct request *rq)
244 {
245 ide_hwif_t *hwif = drive->hwif;
246 _auide_hwif *ahwif = (_auide_hwif*)hwif->hwif_data;
247 struct scatterlist *sg = hwif->sg_table;
248
249 ide_map_sg(drive, rq);
250
251 if (rq_data_dir(rq) == READ)
252 hwif->sg_dma_direction = DMA_FROM_DEVICE;
253 else
254 hwif->sg_dma_direction = DMA_TO_DEVICE;
255
256 return dma_map_sg(ahwif->dev, sg, hwif->sg_nents,
257 hwif->sg_dma_direction);
258 }
259
260 static int auide_build_dmatable(ide_drive_t *drive)
261 {
262 int i, iswrite, count = 0;
263 ide_hwif_t *hwif = HWIF(drive);
264
265 struct request *rq = HWGROUP(drive)->rq;
266
267 _auide_hwif *ahwif = (_auide_hwif*)hwif->hwif_data;
268 struct scatterlist *sg;
269
270 iswrite = (rq_data_dir(rq) == WRITE);
271 /* Save for interrupt context */
272 ahwif->drive = drive;
273
274 /* Build sglist */
275 hwif->sg_nents = i = auide_build_sglist(drive, rq);
276
277 if (!i)
278 return 0;
279
280 /* fill the descriptors */
281 sg = hwif->sg_table;
282 while (i && sg_dma_len(sg)) {
283 u32 cur_addr;
284 u32 cur_len;
285
286 cur_addr = sg_dma_address(sg);
287 cur_len = sg_dma_len(sg);
288
289 while (cur_len) {
290 u32 flags = DDMA_FLAGS_NOIE;
291 unsigned int tc = (cur_len < 0xfe00)? cur_len: 0xfe00;
292
293 if (++count >= PRD_ENTRIES) {
294 printk(KERN_WARNING "%s: DMA table too small\n",
295 drive->name);
296 goto use_pio_instead;
297 }
298
299 /* Lets enable intr for the last descriptor only */
300 if (1==i)
301 flags = DDMA_FLAGS_IE;
302 else
303 flags = DDMA_FLAGS_NOIE;
304
305 if (iswrite) {
306 if(!put_source_flags(ahwif->tx_chan,
307 (void*)(page_address(sg->page)
308 + sg->offset),
309 tc, flags)) {
310 printk(KERN_ERR "%s failed %d\n",
311 __FUNCTION__, __LINE__);
312 }
313 } else
314 {
315 if(!put_dest_flags(ahwif->rx_chan,
316 (void*)(page_address(sg->page)
317 + sg->offset),
318 tc, flags)) {
319 printk(KERN_ERR "%s failed %d\n",
320 __FUNCTION__, __LINE__);
321 }
322 }
323
324 cur_addr += tc;
325 cur_len -= tc;
326 }
327 sg++;
328 i--;
329 }
330
331 if (count)
332 return 1;
333
334 use_pio_instead:
335 dma_unmap_sg(ahwif->dev,
336 hwif->sg_table,
337 hwif->sg_nents,
338 hwif->sg_dma_direction);
339
340 return 0; /* revert to PIO for this request */
341 }
342
343 static int auide_dma_end(ide_drive_t *drive)
344 {
345 ide_hwif_t *hwif = HWIF(drive);
346 _auide_hwif *ahwif = (_auide_hwif*)hwif->hwif_data;
347
348 if (hwif->sg_nents) {
349 dma_unmap_sg(ahwif->dev, hwif->sg_table, hwif->sg_nents,
350 hwif->sg_dma_direction);
351 hwif->sg_nents = 0;
352 }
353
354 return 0;
355 }
356
357 static void auide_dma_start(ide_drive_t *drive )
358 {
359 }
360
361
362 static void auide_dma_exec_cmd(ide_drive_t *drive, u8 command)
363 {
364 /* issue cmd to drive */
365 ide_execute_command(drive, command, &ide_dma_intr,
366 (2*WAIT_CMD), NULL);
367 }
368
369 static int auide_dma_setup(ide_drive_t *drive)
370 {
371 struct request *rq = HWGROUP(drive)->rq;
372
373 if (!auide_build_dmatable(drive)) {
374 ide_map_sg(drive, rq);
375 return 1;
376 }
377
378 drive->waiting_for_dma = 1;
379 return 0;
380 }
381
382 static int auide_dma_check(ide_drive_t *drive)
383 {
384 u8 speed;
385
386 #ifdef CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA
387
388 if( dbdma_init_done == 0 ){
389 auide_hwif.white_list = ide_in_drive_list(drive->id,
390 dma_white_list);
391 auide_hwif.black_list = ide_in_drive_list(drive->id,
392 dma_black_list);
393 auide_hwif.drive = drive;
394 auide_ddma_init(&auide_hwif);
395 dbdma_init_done = 1;
396 }
397 #endif
398
399 /* Is the drive in our DMA black list? */
400
401 if ( auide_hwif.black_list ) {
402 drive->using_dma = 0;
403
404 /* Borrowed the warning message from ide-dma.c */
405
406 printk(KERN_WARNING "%s: Disabling DMA for %s (blacklisted)\n",
407 drive->name, drive->id->model);
408 }
409 else
410 drive->using_dma = 1;
411
412 speed = ide_find_best_mode(drive, XFER_PIO | XFER_MWDMA);
413
414 if (drive->autodma && (speed & XFER_MODE) != XFER_PIO)
415 return 0;
416
417 return -1;
418 }
419
420 static int auide_dma_test_irq(ide_drive_t *drive)
421 {
422 if (drive->waiting_for_dma == 0)
423 printk(KERN_WARNING "%s: ide_dma_test_irq \
424 called while not waiting\n", drive->name);
425
426 /* If dbdma didn't execute the STOP command yet, the
427 * active bit is still set
428 */
429 drive->waiting_for_dma++;
430 if (drive->waiting_for_dma >= DMA_WAIT_TIMEOUT) {
431 printk(KERN_WARNING "%s: timeout waiting for ddma to \
432 complete\n", drive->name);
433 return 1;
434 }
435 udelay(10);
436 return 0;
437 }
438
439 static void auide_dma_host_on(ide_drive_t *drive)
440 {
441 }
442
443 static int auide_dma_on(ide_drive_t *drive)
444 {
445 drive->using_dma = 1;
446
447 return 0;
448 }
449
450 static void auide_dma_host_off(ide_drive_t *drive)
451 {
452 }
453
454 static void auide_dma_off_quietly(ide_drive_t *drive)
455 {
456 drive->using_dma = 0;
457 }
458
459 static void auide_dma_lost_irq(ide_drive_t *drive)
460 {
461 printk(KERN_ERR "%s: IRQ lost\n", drive->name);
462 }
463
464 static void auide_ddma_tx_callback(int irq, void *param)
465 {
466 _auide_hwif *ahwif = (_auide_hwif*)param;
467 ahwif->drive->waiting_for_dma = 0;
468 }
469
470 static void auide_ddma_rx_callback(int irq, void *param)
471 {
472 _auide_hwif *ahwif = (_auide_hwif*)param;
473 ahwif->drive->waiting_for_dma = 0;
474 }
475
476 #endif /* end CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA */
477
478 static void auide_init_dbdma_dev(dbdev_tab_t *dev, u32 dev_id, u32 tsize, u32 devwidth, u32 flags)
479 {
480 dev->dev_id = dev_id;
481 dev->dev_physaddr = (u32)AU1XXX_ATA_PHYS_ADDR;
482 dev->dev_intlevel = 0;
483 dev->dev_intpolarity = 0;
484 dev->dev_tsize = tsize;
485 dev->dev_devwidth = devwidth;
486 dev->dev_flags = flags;
487 }
488
489 #if defined(CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA)
490
491 static int auide_dma_timeout(ide_drive_t *drive)
492 {
493 // printk("%s\n", __FUNCTION__);
494
495 printk(KERN_ERR "%s: DMA timeout occurred: ", drive->name);
496
497 if (HWIF(drive)->ide_dma_test_irq(drive))
498 return 0;
499
500 return HWIF(drive)->ide_dma_end(drive);
501 }
502
503
504 static int auide_ddma_init(_auide_hwif *auide) {
505
506 dbdev_tab_t source_dev_tab, target_dev_tab;
507 u32 dev_id, tsize, devwidth, flags;
508 ide_hwif_t *hwif = auide->hwif;
509
510 dev_id = AU1XXX_ATA_DDMA_REQ;
511
512 if (auide->white_list || auide->black_list) {
513 tsize = 8;
514 devwidth = 32;
515 }
516 else {
517 tsize = 1;
518 devwidth = 16;
519
520 printk(KERN_ERR "au1xxx-ide: %s is not on ide driver whitelist.\n",auide_hwif.drive->id->model);
521 printk(KERN_ERR " please read 'Documentation/mips/AU1xxx_IDE.README'");
522 }
523
524 #ifdef IDE_AU1XXX_BURSTMODE
525 flags = DEV_FLAGS_SYNC | DEV_FLAGS_BURSTABLE;
526 #else
527 flags = DEV_FLAGS_SYNC;
528 #endif
529
530 /* setup dev_tab for tx channel */
531 auide_init_dbdma_dev( &source_dev_tab,
532 dev_id,
533 tsize, devwidth, DEV_FLAGS_OUT | flags);
534 auide->tx_dev_id = au1xxx_ddma_add_device( &source_dev_tab );
535
536 auide_init_dbdma_dev( &source_dev_tab,
537 dev_id,
538 tsize, devwidth, DEV_FLAGS_IN | flags);
539 auide->rx_dev_id = au1xxx_ddma_add_device( &source_dev_tab );
540
541 /* We also need to add a target device for the DMA */
542 auide_init_dbdma_dev( &target_dev_tab,
543 (u32)DSCR_CMD0_ALWAYS,
544 tsize, devwidth, DEV_FLAGS_ANYUSE);
545 auide->target_dev_id = au1xxx_ddma_add_device(&target_dev_tab);
546
547 /* Get a channel for TX */
548 auide->tx_chan = au1xxx_dbdma_chan_alloc(auide->target_dev_id,
549 auide->tx_dev_id,
550 auide_ddma_tx_callback,
551 (void*)auide);
552
553 /* Get a channel for RX */
554 auide->rx_chan = au1xxx_dbdma_chan_alloc(auide->rx_dev_id,
555 auide->target_dev_id,
556 auide_ddma_rx_callback,
557 (void*)auide);
558
559 auide->tx_desc_head = (void*)au1xxx_dbdma_ring_alloc(auide->tx_chan,
560 NUM_DESCRIPTORS);
561 auide->rx_desc_head = (void*)au1xxx_dbdma_ring_alloc(auide->rx_chan,
562 NUM_DESCRIPTORS);
563
564 hwif->dmatable_cpu = dma_alloc_coherent(auide->dev,
565 PRD_ENTRIES * PRD_BYTES, /* 1 Page */
566 &hwif->dmatable_dma, GFP_KERNEL);
567
568 au1xxx_dbdma_start( auide->tx_chan );
569 au1xxx_dbdma_start( auide->rx_chan );
570
571 return 0;
572 }
573 #else
574
575 static int auide_ddma_init( _auide_hwif *auide )
576 {
577 dbdev_tab_t source_dev_tab;
578 int flags;
579
580 #ifdef IDE_AU1XXX_BURSTMODE
581 flags = DEV_FLAGS_SYNC | DEV_FLAGS_BURSTABLE;
582 #else
583 flags = DEV_FLAGS_SYNC;
584 #endif
585
586 /* setup dev_tab for tx channel */
587 auide_init_dbdma_dev( &source_dev_tab,
588 (u32)DSCR_CMD0_ALWAYS,
589 8, 32, DEV_FLAGS_OUT | flags);
590 auide->tx_dev_id = au1xxx_ddma_add_device( &source_dev_tab );
591
592 auide_init_dbdma_dev( &source_dev_tab,
593 (u32)DSCR_CMD0_ALWAYS,
594 8, 32, DEV_FLAGS_IN | flags);
595 auide->rx_dev_id = au1xxx_ddma_add_device( &source_dev_tab );
596
597 /* Get a channel for TX */
598 auide->tx_chan = au1xxx_dbdma_chan_alloc(DSCR_CMD0_ALWAYS,
599 auide->tx_dev_id,
600 NULL,
601 (void*)auide);
602
603 /* Get a channel for RX */
604 auide->rx_chan = au1xxx_dbdma_chan_alloc(auide->rx_dev_id,
605 DSCR_CMD0_ALWAYS,
606 NULL,
607 (void*)auide);
608
609 auide->tx_desc_head = (void*)au1xxx_dbdma_ring_alloc(auide->tx_chan,
610 NUM_DESCRIPTORS);
611 auide->rx_desc_head = (void*)au1xxx_dbdma_ring_alloc(auide->rx_chan,
612 NUM_DESCRIPTORS);
613
614 au1xxx_dbdma_start( auide->tx_chan );
615 au1xxx_dbdma_start( auide->rx_chan );
616
617 return 0;
618 }
619 #endif
620
621 static void auide_setup_ports(hw_regs_t *hw, _auide_hwif *ahwif)
622 {
623 int i;
624 unsigned long *ata_regs = hw->io_ports;
625
626 /* FIXME? */
627 for (i = 0; i < IDE_CONTROL_OFFSET; i++) {
628 *ata_regs++ = ahwif->regbase + (i << AU1XXX_ATA_REG_OFFSET);
629 }
630
631 /* set the Alternative Status register */
632 *ata_regs = ahwif->regbase + (14 << AU1XXX_ATA_REG_OFFSET);
633 }
634
635 static int au_ide_probe(struct device *dev)
636 {
637 struct platform_device *pdev = to_platform_device(dev);
638 _auide_hwif *ahwif = &auide_hwif;
639 ide_hwif_t *hwif;
640 struct resource *res;
641 hw_regs_t *hw;
642 int ret = 0;
643
644 #if defined(CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA)
645 char *mode = "MWDMA2";
646 #elif defined(CONFIG_BLK_DEV_IDE_AU1XXX_PIO_DBDMA)
647 char *mode = "PIO+DDMA(offload)";
648 #endif
649
650 memset(&auide_hwif, 0, sizeof(_auide_hwif));
651 auide_hwif.dev = 0;
652
653 ahwif->dev = dev;
654 ahwif->irq = platform_get_irq(pdev, 0);
655
656 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
657
658 if (res == NULL) {
659 pr_debug("%s %d: no base address\n", DRV_NAME, pdev->id);
660 ret = -ENODEV;
661 goto out;
662 }
663 if (ahwif->irq < 0) {
664 pr_debug("%s %d: no IRQ\n", DRV_NAME, pdev->id);
665 ret = -ENODEV;
666 goto out;
667 }
668
669 if (!request_mem_region (res->start, res->end-res->start, pdev->name)) {
670 pr_debug("%s: request_mem_region failed\n", DRV_NAME);
671 ret = -EBUSY;
672 goto out;
673 }
674
675 ahwif->regbase = (u32)ioremap(res->start, res->end-res->start);
676 if (ahwif->regbase == 0) {
677 ret = -ENOMEM;
678 goto out;
679 }
680
681 /* FIXME: This might possibly break PCMCIA IDE devices */
682
683 hwif = &ide_hwifs[pdev->id];
684 hw = &hwif->hw;
685 hwif->irq = hw->irq = ahwif->irq;
686 hwif->chipset = ide_au1xxx;
687
688 auide_setup_ports(hw, ahwif);
689 memcpy(hwif->io_ports, hw->io_ports, sizeof(hwif->io_ports));
690
691 hwif->ultra_mask = 0x0; /* Disable Ultra DMA */
692 #ifdef CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA
693 hwif->mwdma_mask = 0x07; /* Multimode-2 DMA */
694 hwif->swdma_mask = 0x00;
695 #else
696 hwif->mwdma_mask = 0x0;
697 hwif->swdma_mask = 0x0;
698 #endif
699
700 hwif->noprobe = 0;
701 hwif->drives[0].unmask = 1;
702 hwif->drives[1].unmask = 1;
703
704 /* hold should be on in all cases */
705 hwif->hold = 1;
706
707 hwif->mmio = 1;
708
709 /* If the user has selected DDMA assisted copies,
710 then set up a few local I/O function entry points
711 */
712
713 #ifdef CONFIG_BLK_DEV_IDE_AU1XXX_PIO_DBDMA
714 hwif->INSW = auide_insw;
715 hwif->OUTSW = auide_outsw;
716 #endif
717
718 hwif->tuneproc = &auide_tune_drive;
719 hwif->speedproc = &auide_tune_chipset;
720
721 #ifdef CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA
722 hwif->dma_off_quietly = &auide_dma_off_quietly;
723 hwif->ide_dma_timeout = &auide_dma_timeout;
724
725 hwif->ide_dma_check = &auide_dma_check;
726 hwif->dma_exec_cmd = &auide_dma_exec_cmd;
727 hwif->dma_start = &auide_dma_start;
728 hwif->ide_dma_end = &auide_dma_end;
729 hwif->dma_setup = &auide_dma_setup;
730 hwif->ide_dma_test_irq = &auide_dma_test_irq;
731 hwif->dma_host_off = &auide_dma_host_off;
732 hwif->dma_host_on = &auide_dma_host_on;
733 hwif->dma_lost_irq = &auide_dma_lost_irq;
734 hwif->ide_dma_on = &auide_dma_on;
735
736 hwif->autodma = 1;
737 hwif->drives[0].autodma = hwif->autodma;
738 hwif->drives[1].autodma = hwif->autodma;
739 hwif->atapi_dma = 1;
740
741 #else /* !CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA */
742 hwif->autodma = 0;
743 hwif->channel = 0;
744 hwif->hold = 1;
745 hwif->select_data = 0; /* no chipset-specific code */
746 hwif->config_data = 0; /* no chipset-specific code */
747
748 hwif->drives[0].autodma = 0;
749 hwif->drives[0].autotune = 1; /* 1=autotune, 2=noautotune, 0=default */
750 #endif
751 hwif->drives[0].no_io_32bit = 1;
752
753 auide_hwif.hwif = hwif;
754 hwif->hwif_data = &auide_hwif;
755
756 #ifdef CONFIG_BLK_DEV_IDE_AU1XXX_PIO_DBDMA
757 auide_ddma_init(&auide_hwif);
758 dbdma_init_done = 1;
759 #endif
760
761 probe_hwif_init(hwif);
762
763 ide_proc_register_port(hwif);
764
765 dev_set_drvdata(dev, hwif);
766
767 printk(KERN_INFO "Au1xxx IDE(builtin) configured for %s\n", mode );
768
769 out:
770 return ret;
771 }
772
773 static int au_ide_remove(struct device *dev)
774 {
775 struct platform_device *pdev = to_platform_device(dev);
776 struct resource *res;
777 ide_hwif_t *hwif = dev_get_drvdata(dev);
778 _auide_hwif *ahwif = &auide_hwif;
779
780 ide_unregister(hwif - ide_hwifs);
781
782 iounmap((void *)ahwif->regbase);
783
784 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
785 release_mem_region(res->start, res->end - res->start);
786
787 return 0;
788 }
789
790 static struct device_driver au1200_ide_driver = {
791 .name = "au1200-ide",
792 .bus = &platform_bus_type,
793 .probe = au_ide_probe,
794 .remove = au_ide_remove,
795 };
796
797 static int __init au_ide_init(void)
798 {
799 return driver_register(&au1200_ide_driver);
800 }
801
802 static void __exit au_ide_exit(void)
803 {
804 driver_unregister(&au1200_ide_driver);
805 }
806
807 MODULE_LICENSE("GPL");
808 MODULE_DESCRIPTION("AU1200 IDE driver");
809
810 module_init(au_ide_init);
811 module_exit(au_ide_exit);
Linux kernel - Deliverables
This page took 0.046661 seconds and 5 git commands to generate.