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>
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a530201afe
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8704de8f29
3 changed files with 24 additions and 57 deletions
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@ -755,6 +755,7 @@ EXPORT_SYMBOL_GPL(ide_find_dma_mode);
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static int ide_tune_dma(ide_drive_t *drive)
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{
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ide_hwif_t *hwif = drive->hwif;
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u8 speed;
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if (noautodma || drive->nodma || (drive->id->capability & 1) == 0)
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@ -767,15 +768,21 @@ static int ide_tune_dma(ide_drive_t *drive)
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if (ide_id_dma_bug(drive))
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return 0;
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if (drive->hwif->host_flags & IDE_HFLAG_TRUST_BIOS_FOR_DMA)
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if (hwif->host_flags & IDE_HFLAG_TRUST_BIOS_FOR_DMA)
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return config_drive_for_dma(drive);
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speed = ide_max_dma_mode(drive);
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if (!speed)
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return 0;
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if (!speed) {
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/* is this really correct/needed? */
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if ((hwif->host_flags & IDE_HFLAG_CY82C693) &&
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ide_dma_good_drive(drive))
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return 1;
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else
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return 0;
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}
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if (drive->hwif->host_flags & IDE_HFLAG_NO_SET_MODE)
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if (hwif->host_flags & IDE_HFLAG_NO_SET_MODE)
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return 0;
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if (ide_set_dma_mode(drive, speed))
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@ -1,5 +1,5 @@
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/*
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* linux/drivers/ide/pci/cy82c693.c Version 0.43 Nov 7, 2007
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* linux/drivers/ide/pci/cy82c693.c Version 0.44 Nov 8, 2007
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*
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* Copyright (C) 1998-2000 Andreas S. Krebs (akrebs@altavista.net), Maintainer
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* Copyright (C) 1998-2002 Andre Hedrick <andre@linux-ide.org>, Integrator
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@ -176,14 +176,12 @@ static void compute_clocks (u8 pio, pio_clocks_t *p_pclk)
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* set DMA mode a specific channel for CY82C693
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*/
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static void cy82c693_dma_enable (ide_drive_t *drive, int mode, int single)
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static void cy82c693_set_dma_mode(ide_drive_t *drive, const u8 mode)
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{
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u8 index = 0, data = 0;
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ide_hwif_t *hwif = drive->hwif;
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u8 single = (mode & 0x10) >> 4, index = 0, data = 0;
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if (mode>2) /* make sure we set a valid mode */
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mode = 2;
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index = (HWIF(drive)->channel==0) ? CY82_INDEX_CHANNEL0 : CY82_INDEX_CHANNEL1;
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index = hwif->channel ? CY82_INDEX_CHANNEL1 : CY82_INDEX_CHANNEL0;
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#if CY82C693_DEBUG_LOGS
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/* for debug let's show the previous values */
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@ -196,7 +194,7 @@ static void cy82c693_dma_enable (ide_drive_t *drive, int mode, int single)
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(data&0x3), ((data>>2)&1));
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#endif /* CY82C693_DEBUG_LOGS */
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data = (u8)mode|(u8)(single<<2);
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data = (mode & 3) | (single << 2);
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outb(index, CY82_INDEX_PORT);
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outb(data, CY82_DATA_PORT);
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@ -204,7 +202,7 @@ static void cy82c693_dma_enable (ide_drive_t *drive, int mode, int single)
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#if CY82C693_DEBUG_INFO
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printk(KERN_INFO "%s (ch=%d, dev=%d): set DMA mode to %d (single=%d)\n",
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drive->name, HWIF(drive)->channel, drive->select.b.unit,
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mode, single);
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mode & 3, single);
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#endif /* CY82C693_DEBUG_INFO */
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/*
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@ -227,42 +225,6 @@ static void cy82c693_dma_enable (ide_drive_t *drive, int mode, int single)
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#endif /* CY82C693_DEBUG_INFO */
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}
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/*
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* used to set DMA mode for CY82C693 (single and multi modes)
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*/
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static int cy82c693_ide_dma_on (ide_drive_t *drive)
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{
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struct hd_driveid *id = drive->id;
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#if CY82C693_DEBUG_INFO
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printk (KERN_INFO "dma_on: %s\n", drive->name);
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#endif /* CY82C693_DEBUG_INFO */
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if (id != NULL) {
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/* Enable DMA on any drive that has DMA
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* (multi or single) enabled
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*/
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if (id->field_valid & 2) { /* regular DMA */
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int mmode, smode;
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mmode = id->dma_mword & (id->dma_mword >> 8);
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smode = id->dma_1word & (id->dma_1word >> 8);
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mmode &= ATA_MWDMA2;
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smode &= ATA_SWDMA2;
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if (mmode != 0) {
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/* enable multi */
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cy82c693_dma_enable(drive, (mmode >> 1), 0);
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} else if (smode != 0) {
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/* enable single */
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cy82c693_dma_enable(drive, (smode >> 1), 1);
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}
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}
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}
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return __ide_dma_on(drive);
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}
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static void cy82c693_set_pio_mode(ide_drive_t *drive, const u8 pio)
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{
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ide_hwif_t *hwif = HWIF(drive);
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@ -429,11 +391,7 @@ static unsigned int __devinit init_chipset_cy82c693(struct pci_dev *dev, const c
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static void __devinit init_hwif_cy82c693(ide_hwif_t *hwif)
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{
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hwif->set_pio_mode = &cy82c693_set_pio_mode;
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if (hwif->dma_base == 0)
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return;
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hwif->ide_dma_on = &cy82c693_ide_dma_on;
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hwif->set_dma_mode = &cy82c693_set_dma_mode;
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}
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static void __devinit init_iops_cy82c693(ide_hwif_t *hwif)
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@ -454,11 +412,11 @@ static const struct ide_port_info cy82c693_chipset __devinitdata = {
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.init_iops = init_iops_cy82c693,
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.init_hwif = init_hwif_cy82c693,
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.chipset = ide_cy82c693,
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.host_flags = IDE_HFLAG_SINGLE | IDE_HFLAG_TRUST_BIOS_FOR_DMA |
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.host_flags = IDE_HFLAG_SINGLE | IDE_HFLAG_CY82C693 |
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IDE_HFLAG_BOOTABLE,
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.pio_mask = ATA_PIO4,
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.swdma_mask = ATA_SWDMA2_ONLY,
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.mwdma_mask = ATA_MWDMA2_ONLY,
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.swdma_mask = ATA_SWDMA2,
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.mwdma_mask = ATA_MWDMA2,
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};
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static int __devinit cy82c693_init_one(struct pci_dev *dev, const struct pci_device_id *id)
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@ -1095,6 +1095,8 @@ enum {
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/* unmask IRQs */
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IDE_HFLAG_UNMASK_IRQS = (1 << 25),
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IDE_HFLAG_ABUSE_SET_DMA_MODE = (1 << 26),
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/* host is CY82C693 */
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IDE_HFLAG_CY82C693 = (1 << 27),
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};
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#ifdef CONFIG_BLK_DEV_OFFBOARD
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