OpenE2K
/
linux
6
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

cy82c693: add ->set_dma_mode method 

* Fix SWDMA/MWDMA masks in cy82c693_chipset.

* Add IDE_HFLAG_CY82C693 host flag and use it in ide_tune_dma() to
  check whether the DMA should be enabled even if ide_max_dma_mode()
  fails.

* Convert cy82c693_dma_enable() to become cy82c693_set_dma_mode()
  and remove no longer needed cy82c693_ide_dma_on().  Then set
  IDE_HFLAG_CY82C693 instead of IDE_HFLAG_TRUST_BIOS_FOR_DMA in
  cy82c693_chipset.

* Bump driver version.

As a result of this patch cy82c693 driver will configure and use DMA on
all SWDMA0-2 and MWDMA0-2 capable ATA devices instead of relying on BIOS.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2008-01-26 20:13:00 +01:00
parent a530201afe
commit 8704de8f29
3 changed files with 24 additions and 57 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
drivers/ide/ide-dma.c
View File

@ -755,6 +755,7 @@ EXPORT_SYMBOL_GPL(ide_find_dma_mode);
static int ide_tune_dma(ide_drive_t *drive)
{
ide_hwif_t *hwif = drive->hwif;
u8 speed;
if (noautodma || drive->nodma || (drive->id->capability & 1) == 0)
@ -767,15 +768,21 @@ static int ide_tune_dma(ide_drive_t *drive)
if (ide_id_dma_bug(drive))
return 0;
if (drive->hwif->host_flags & IDE_HFLAG_TRUST_BIOS_FOR_DMA)
if (hwif->host_flags & IDE_HFLAG_TRUST_BIOS_FOR_DMA)
return config_drive_for_dma(drive);
speed = ide_max_dma_mode(drive);
if (!speed)
return 0;
if (!speed) {
/* is this really correct/needed? */
if ((hwif->host_flags & IDE_HFLAG_CY82C693) &&
ide_dma_good_drive(drive))
return 1;
else
return 0;
}
if (drive->hwif->host_flags & IDE_HFLAG_NO_SET_MODE)
if (hwif->host_flags & IDE_HFLAG_NO_SET_MODE)
return 0;
if (ide_set_dma_mode(drive, speed))

64
drivers/ide/pci/cy82c693.c
View File

@ -1,5 +1,5 @@
/*
* linux/drivers/ide/pci/cy82c693.c Version 0.43 Nov 7, 2007
* linux/drivers/ide/pci/cy82c693.c Version 0.44 Nov 8, 2007
*
* Copyright (C) 1998-2000 Andreas S. Krebs (akrebs@altavista.net), Maintainer
* Copyright (C) 1998-2002 Andre Hedrick <andre@linux-ide.org>, Integrator
@ -176,14 +176,12 @@ static void compute_clocks (u8 pio, pio_clocks_t *p_pclk)
* set DMA mode a specific channel for CY82C693
*/
static void cy82c693_dma_enable (ide_drive_t *drive, int mode, int single)
static void cy82c693_set_dma_mode(ide_drive_t *drive, const u8 mode)
{
u8 index = 0, data = 0;
ide_hwif_t *hwif = drive->hwif;
u8 single = (mode & 0x10) >> 4, index = 0, data = 0;
if (mode>2) /* make sure we set a valid mode */
mode = 2;
index = (HWIF(drive)->channel==0) ? CY82_INDEX_CHANNEL0 : CY82_INDEX_CHANNEL1;
index = hwif->channel ? CY82_INDEX_CHANNEL1 : CY82_INDEX_CHANNEL0;
#if CY82C693_DEBUG_LOGS
/* for debug let's show the previous values */
@ -196,7 +194,7 @@ static void cy82c693_dma_enable (ide_drive_t *drive, int mode, int single)
(data&0x3), ((data>>2)&1));
#endif /* CY82C693_DEBUG_LOGS */
data = (u8)mode|(u8)(single<<2);
data = (mode & 3) | (single << 2);
outb(index, CY82_INDEX_PORT);
outb(data, CY82_DATA_PORT);
@ -204,7 +202,7 @@ static void cy82c693_dma_enable (ide_drive_t *drive, int mode, int single)
#if CY82C693_DEBUG_INFO
printk(KERN_INFO "%s (ch=%d, dev=%d): set DMA mode to %d (single=%d)\n",
drive->name, HWIF(drive)->channel, drive->select.b.unit,
mode, single);
mode & 3, single);
#endif /* CY82C693_DEBUG_INFO */
/*
@ -227,42 +225,6 @@ static void cy82c693_dma_enable (ide_drive_t *drive, int mode, int single)
#endif /* CY82C693_DEBUG_INFO */
}
/*
* used to set DMA mode for CY82C693 (single and multi modes)
*/
static int cy82c693_ide_dma_on (ide_drive_t *drive)
{
struct hd_driveid *id = drive->id;
#if CY82C693_DEBUG_INFO
printk (KERN_INFO "dma_on: %s\n", drive->name);
#endif /* CY82C693_DEBUG_INFO */
if (id != NULL) {
/* Enable DMA on any drive that has DMA
* (multi or single) enabled
*/
if (id->field_valid & 2) { /* regular DMA */
int mmode, smode;
mmode = id->dma_mword & (id->dma_mword >> 8);
smode = id->dma_1word & (id->dma_1word >> 8);
mmode &= ATA_MWDMA2;
smode &= ATA_SWDMA2;
if (mmode != 0) {
/* enable multi */
cy82c693_dma_enable(drive, (mmode >> 1), 0);
} else if (smode != 0) {
/* enable single */
cy82c693_dma_enable(drive, (smode >> 1), 1);
}
}
}
return __ide_dma_on(drive);
}
static void cy82c693_set_pio_mode(ide_drive_t *drive, const u8 pio)
{
ide_hwif_t *hwif = HWIF(drive);
@ -429,11 +391,7 @@ static unsigned int __devinit init_chipset_cy82c693(struct pci_dev *dev, const c
static void __devinit init_hwif_cy82c693(ide_hwif_t *hwif)
{
hwif->set_pio_mode = &cy82c693_set_pio_mode;
if (hwif->dma_base == 0)
return;
hwif->ide_dma_on = &cy82c693_ide_dma_on;
hwif->set_dma_mode = &cy82c693_set_dma_mode;
}
static void __devinit init_iops_cy82c693(ide_hwif_t *hwif)
@ -454,11 +412,11 @@ static const struct ide_port_info cy82c693_chipset __devinitdata = {
.init_iops = init_iops_cy82c693,
.init_hwif = init_hwif_cy82c693,
.chipset = ide_cy82c693,
.host_flags = IDE_HFLAG_SINGLE | IDE_HFLAG_TRUST_BIOS_FOR_DMA |
.host_flags = IDE_HFLAG_SINGLE | IDE_HFLAG_CY82C693 |
IDE_HFLAG_BOOTABLE,
.pio_mask = ATA_PIO4,
.swdma_mask = ATA_SWDMA2_ONLY,
.mwdma_mask = ATA_MWDMA2_ONLY,
.swdma_mask = ATA_SWDMA2,
.mwdma_mask = ATA_MWDMA2,
};
static int __devinit cy82c693_init_one(struct pci_dev *dev, const struct pci_device_id *id)

2
include/linux/ide.h
View File

@ -1095,6 +1095,8 @@ enum {
/* unmask IRQs */
IDE_HFLAG_UNMASK_IRQS = (1 << 25),
IDE_HFLAG_ABUSE_SET_DMA_MODE = (1 << 26),
/* host is CY82C693 */
IDE_HFLAG_CY82C693 = (1 << 27),
};
#ifdef CONFIG_BLK_DEV_OFFBOARD