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Commit fd553ce8 authored by Bartlomiej Zolnierkiewicz's avatar Bartlomiej Zolnierkiewicz
Browse files

ide-pmac: remove pmac_ide_{m,u}dma_enable() (take 2) 



* Fix pmac_ide_dma_check() to use pmac_ide_tune_chipset() and remove no longer
  necessary pmac_ide_{m,u}dma_enable().

* While at it remove some dead code from pmac_ide_dma_check() (leftovers from
  conversion to use ide_max_dma_mode()).

There should be no functionality changes caused by this patch.

v2:
* Fix compile by replacing "id" with "drive->id" in pmac_ide_dma_check()
  (Noticed by Ben).

Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: default avatarBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
parent 78103940

drivers/ide/ppc/pmac.c

+4 −98
Original line number Diff line number Diff line
@@ -1670,94 +1670,6 @@ pmac_ide_destroy_dmatable (ide_drive_t *drive) 
	}

}



/*

 * Pick up best MDMA timing for the drive and apply it

 */

static int

pmac_ide_mdma_enable(ide_drive_t *drive, u16 mode)

{

	ide_hwif_t *hwif = HWIF(drive);

	pmac_ide_hwif_t* pmif = (pmac_ide_hwif_t *)hwif->hwif_data;

	u32 *timings, *timings2;

	u32 timing_local[2];

	int ret;



	/* which drive is it ? */

	timings = &pmif->timings[drive->select.b.unit & 0x01];

	timings2 = &pmif->timings[(drive->select.b.unit & 0x01) + 2];



	/* Copy timings to local image */

	timing_local[0] = *timings;

	timing_local[1] = *timings2;



	/* Calculate controller timings */

	set_timings_mdma(drive, pmif->kind, &timing_local[0], &timing_local[1], mode);



	/* Set feature on drive */

    	printk(KERN_INFO "%s: Enabling MultiWord DMA %d\n", drive->name, mode & 0xf);

	ret = pmac_ide_do_setfeature(drive, mode);

	if (ret) {

	    	printk(KERN_WARNING "%s: Failed !\n", drive->name);

	    	return 0;

	}



	/* Apply timings to controller */

	*timings = timing_local[0];

	*timings2 = timing_local[1];



	return 1;

}



/*

 * Pick up best UDMA timing for the drive and apply it

 */

static int

pmac_ide_udma_enable(ide_drive_t *drive, u16 mode)

{

	ide_hwif_t *hwif = HWIF(drive);

	pmac_ide_hwif_t* pmif = (pmac_ide_hwif_t *)hwif->hwif_data;

	u32 *timings, *timings2;

	u32 timing_local[2];

	int ret;

		

	/* which drive is it ? */

	timings = &pmif->timings[drive->select.b.unit & 0x01];

	timings2 = &pmif->timings[(drive->select.b.unit & 0x01) + 2];



	/* Copy timings to local image */

	timing_local[0] = *timings;

	timing_local[1] = *timings2;

	

	/* Calculate timings for interface */

	if (pmif->kind == controller_un_ata6

	    || pmif->kind == controller_k2_ata6)

		ret = set_timings_udma_ata6(	&timing_local[0],

						&timing_local[1],

						mode);

	else if (pmif->kind == controller_sh_ata6)

		ret = set_timings_udma_shasta(	&timing_local[0],

						&timing_local[1],

						mode);

	else

		ret = set_timings_udma_ata4(&timing_local[0], mode);

	if (ret)

		return 0;

		

	/* Set feature on drive */

    	printk(KERN_INFO "%s: Enabling Ultra DMA %d\n", drive->name, mode & 0x0f);

	ret = pmac_ide_do_setfeature(drive, mode);

	if (ret) {

		printk(KERN_WARNING "%s: Failed !\n", drive->name);

		return 0;

	}



	/* Apply timings to controller */

	*timings = timing_local[0];

	*timings2 = timing_local[1];



	return 1;

}



/*

 * Check what is the best DMA timing setting for the drive and

 * call appropriate functions to apply it.
@@ -1765,14 +1677,13 @@ pmac_ide_udma_enable(ide_drive_t *drive, u16 mode) 
static int

pmac_ide_dma_check(ide_drive_t *drive)

{

	struct hd_driveid *id = drive->id;

	ide_hwif_t *hwif = HWIF(drive);

	int enable = 1;



	drive->using_dma = 0;

	

	if (drive->media == ide_floppy)

		enable = 0;

	if (((id->capability & 1) == 0) && !__ide_dma_good_drive(drive))

	if ((drive->id->capability & 1) == 0 && !__ide_dma_good_drive(drive))

		enable = 0;

	if (__ide_dma_bad_drive(drive))

		enable = 0;
@@ -1780,13 +1691,8 @@ pmac_ide_dma_check(ide_drive_t *drive) 
	if (enable) {

		u8 mode = ide_max_dma_mode(drive);



		if (mode >= XFER_UDMA_0)

			drive->using_dma = pmac_ide_udma_enable(drive, mode);

		else if (mode >= XFER_MW_DMA_0)

			drive->using_dma = pmac_ide_mdma_enable(drive, mode);



		/* Apply settings to controller */

		pmac_ide_do_update_timings(drive);

		if (mode && pmac_ide_tune_chipset(drive, mode) == 0)

			drive->using_dma = 1;

	}

	return 0;

}