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Commit 24e6458d authored by Sergei Shtylyov's avatar Sergei Shtylyov Committed by Bartlomiej Zolnierkiewicz
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slc90e66: carry over fixes from piix driver 



Synchronize with version 0.46 of the Intel PIIX/ICH driver:

- carry over Alan's and my own fixes in the tuneproc() method and my cleanups
  both there and in the ratemask() method;

- SLC90E66 only supports MW DMA modes 1/2 and SW DMA mode 2 (just like Intel
  chips), so don't claim support for other MW/SW DMA modes;

- don't check dor non-NULL drive->id in the ide_dma_check() method -- this is
  assumed to be true in all other drivers;

- do some coding/formatting cleanups while at it...

Signed-off-by: default avatarSergei Shtylyov <sshtylyov@ru.mvista.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
parent 30dfd12f

drivers/ide/pci/slc90e66.c

+34 −21
Original line number Diff line number Diff line 
/*

 *  linux/drivers/ide/pci/slc90e66.c	Version 0.12	May 12, 2006

 *  linux/drivers/ide/pci/slc90e66.c	Version 0.13	December 30, 2006

 *

 *  Copyright (C) 2000-2002 Andre Hedrick <andre@linux-ide.org>

 *  Copyright (C) 2006 MontaVista Software, Inc. <source@mvista.com>
@@ -26,7 +26,7 @@ static u8 slc90e66_ratemask (ide_drive_t *drive) 
	u8 mode	= 2;



	if (!eighty_ninty_three(drive))

		mode = min(mode, (u8)1);

		mode = min_t(u8, mode, 1);

	return mode;

}
@@ -65,12 +65,13 @@ static void slc90e66_tune_drive (ide_drive_t *drive, u8 pio) 
{

	ide_hwif_t *hwif	= HWIF(drive);

	struct pci_dev *dev	= hwif->pci_dev;

	int is_slave		= (&hwif->drives[1] == drive);

	int is_slave		= drive->dn & 1;

	int master_port		= hwif->channel ? 0x42 : 0x40;

	int slave_port		= 0x44;

	unsigned long flags;

	u16 master_data;

	u8 slave_data;

 	int control = 0;

				     /* ISP  RTC */

	static const u8 timings[][2]= {

					{ 0, 0 },
@@ -79,22 +80,32 @@ static void slc90e66_tune_drive (ide_drive_t *drive, u8 pio) 
					{ 2, 1 },

					{ 2, 3 }, };



	pio = ide_get_best_pio_mode(drive, pio, 5, NULL);

	pio = ide_get_best_pio_mode(drive, pio, 4, NULL);

	spin_lock_irqsave(&ide_lock, flags);

	pci_read_config_word(dev, master_port, &master_data);

	if (is_slave) {

		master_data = master_data | 0x4000;



	if (pio > 1)

		control |= 1;	/* Programmable timing on */

	if (drive->media == ide_disk)

		control |= 4;	/* Prefetch, post write */

	if (pio > 2)

		control |= 2;	/* IORDY */

	if (is_slave) {

		master_data |=  0x4000;

		master_data &= ~0x0070;

		if (pio > 1) {

			/* enable PPE, IE and TIME */

			master_data = master_data | 0x0070;

			master_data = master_data | (control << 4);

		}

		pci_read_config_byte(dev, slave_port, &slave_data);

		slave_data = slave_data & (hwif->channel ? 0x0f : 0xf0);

		slave_data = slave_data | (((timings[pio][0] << 2) | timings[pio][1]) << (hwif->channel ? 4 : 0));

	} else {

		master_data = master_data & 0xccf8;

		if (pio > 1)

		master_data &= ~0x3307;

		if (pio > 1) {

			/* enable PPE, IE and TIME */

			master_data = master_data | 0x0007;

			master_data = master_data | control;

		}

		master_data = master_data | (timings[pio][0] << 12) | (timings[pio][1] << 8);

	}

	pci_write_config_word(dev, master_port, master_data);
@@ -173,7 +184,7 @@ static int slc90e66_config_drive_xfer_rate (ide_drive_t *drive) 


	drive->init_speed = 0;



	if (id && (id->capability & 1) && drive->autodma) {

	if ((id->capability & 1) && drive->autodma) {



		if (ide_use_dma(drive) && slc90e66_config_drive_for_dma(drive))

			return hwif->ide_dma_on(drive);
@@ -213,14 +224,16 @@ static void __devinit init_hwif_slc90e66 (ide_hwif_t *hwif) 


	hwif->atapi_dma = 1;

	hwif->ultra_mask = 0x1f;

	hwif->mwdma_mask = 0x07;

	hwif->swdma_mask = 0x07;

	hwif->mwdma_mask = 0x06;

	hwif->swdma_mask = 0x04;



	if (!(hwif->udma_four))

	if (!hwif->udma_four) {

		/* bit[0(1)]: 0:80, 1:40 */

		hwif->udma_four = (reg47 & mask) ? 0 : 1;

	}



	hwif->ide_dma_check = &slc90e66_config_drive_xfer_rate;



	if (!noautodma)

		hwif->autodma = 1;

	hwif->drives[0].autodma = hwif->autodma;