1c164acf50
The driver used to depend on BIOS settings for deciding whether it is OK to use DMA. However it seems that BIOS doesn't always handle all cases correctly so just let IDE core to decide about this. It should be a safe thing to do now, after the driver went through heavy bugfixing. Thanks for bugreport and testing the patch goes out to Sven Niedner. Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
528 lines
15 KiB
C
528 lines
15 KiB
C
/*
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* linux/drivers/ide/pci/serverworks.c Version 0.22 Jun 27 2007
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*
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* Copyright (C) 1998-2000 Michel Aubry
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* Copyright (C) 1998-2000 Andrzej Krzysztofowicz
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* Copyright (C) 1998-2000 Andre Hedrick <andre@linux-ide.org>
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* Copyright (C) 2007 Bartlomiej Zolnierkiewicz
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* Portions copyright (c) 2001 Sun Microsystems
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*
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*
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* RCC/ServerWorks IDE driver for Linux
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*
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* OSB4: `Open South Bridge' IDE Interface (fn 1)
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* supports UDMA mode 2 (33 MB/s)
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*
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* CSB5: `Champion South Bridge' IDE Interface (fn 1)
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* all revisions support UDMA mode 4 (66 MB/s)
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* revision A2.0 and up support UDMA mode 5 (100 MB/s)
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*
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* *** The CSB5 does not provide ANY register ***
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* *** to detect 80-conductor cable presence. ***
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*
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* CSB6: `Champion South Bridge' IDE Interface (optional: third channel)
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*
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* HT1000: AKA BCM5785 - Hypertransport Southbridge for Opteron systems. IDE
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* controller same as the CSB6. Single channel ATA100 only.
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*
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* Documentation:
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* Available under NDA only. Errata info very hard to get.
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*
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*/
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#include <linux/types.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/ioport.h>
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#include <linux/pci.h>
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#include <linux/hdreg.h>
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#include <linux/ide.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <asm/io.h>
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#define SVWKS_CSB5_REVISION_NEW 0x92 /* min PCI_REVISION_ID for UDMA5 (A2.0) */
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#define SVWKS_CSB6_REVISION 0xa0 /* min PCI_REVISION_ID for UDMA4 (A1.0) */
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/* Seagate Barracuda ATA IV Family drives in UDMA mode 5
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* can overrun their FIFOs when used with the CSB5 */
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static const char *svwks_bad_ata100[] = {
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"ST320011A",
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"ST340016A",
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"ST360021A",
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"ST380021A",
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NULL
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};
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static struct pci_dev *isa_dev;
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static int check_in_drive_lists (ide_drive_t *drive, const char **list)
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{
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while (*list)
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if (!strcmp(*list++, drive->id->model))
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return 1;
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return 0;
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}
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static u8 svwks_udma_filter(ide_drive_t *drive)
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{
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struct pci_dev *dev = HWIF(drive)->pci_dev;
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u8 mask = 0;
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if (dev->device == PCI_DEVICE_ID_SERVERWORKS_HT1000IDE)
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return 0x1f;
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if (dev->device == PCI_DEVICE_ID_SERVERWORKS_OSB4IDE) {
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u32 reg = 0;
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if (isa_dev)
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pci_read_config_dword(isa_dev, 0x64, ®);
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/*
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* Don't enable UDMA on disk devices for the moment
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*/
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if(drive->media == ide_disk)
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return 0;
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/* Check the OSB4 DMA33 enable bit */
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return ((reg & 0x00004000) == 0x00004000) ? 0x07 : 0;
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} else if (dev->revision < SVWKS_CSB5_REVISION_NEW) {
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return 0x07;
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} else if (dev->revision >= SVWKS_CSB5_REVISION_NEW) {
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u8 btr = 0, mode;
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pci_read_config_byte(dev, 0x5A, &btr);
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mode = btr & 0x3;
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/* If someone decides to do UDMA133 on CSB5 the same
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issue will bite so be inclusive */
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if (mode > 2 && check_in_drive_lists(drive, svwks_bad_ata100))
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mode = 2;
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switch(mode) {
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case 2: mask = 0x1f; break;
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case 1: mask = 0x07; break;
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default: mask = 0x00; break;
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}
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}
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if (((dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) ||
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(dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2)) &&
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(!(PCI_FUNC(dev->devfn) & 1)))
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mask = 0x1f;
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return mask;
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}
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static u8 svwks_csb_check (struct pci_dev *dev)
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{
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switch (dev->device) {
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case PCI_DEVICE_ID_SERVERWORKS_CSB5IDE:
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case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE:
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case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2:
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case PCI_DEVICE_ID_SERVERWORKS_HT1000IDE:
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return 1;
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default:
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break;
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}
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return 0;
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}
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static void svwks_tune_pio(ide_drive_t *drive, const u8 pio)
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{
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static const u8 pio_modes[] = { 0x5d, 0x47, 0x34, 0x22, 0x20 };
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static const u8 drive_pci[] = { 0x41, 0x40, 0x43, 0x42 };
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struct pci_dev *dev = drive->hwif->pci_dev;
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pci_write_config_byte(dev, drive_pci[drive->dn], pio_modes[pio]);
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if (svwks_csb_check(dev)) {
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u16 csb_pio = 0;
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pci_read_config_word(dev, 0x4a, &csb_pio);
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csb_pio &= ~(0x0f << (4 * drive->dn));
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csb_pio |= (pio << (4 * drive->dn));
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pci_write_config_word(dev, 0x4a, csb_pio);
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}
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}
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static int svwks_tune_chipset (ide_drive_t *drive, u8 xferspeed)
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{
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static const u8 udma_modes[] = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05 };
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static const u8 dma_modes[] = { 0x77, 0x21, 0x20 };
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static const u8 drive_pci2[] = { 0x45, 0x44, 0x47, 0x46 };
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ide_hwif_t *hwif = HWIF(drive);
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struct pci_dev *dev = hwif->pci_dev;
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u8 speed = ide_rate_filter(drive, xferspeed);
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u8 unit = (drive->select.b.unit & 0x01);
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u8 ultra_enable = 0, ultra_timing = 0, dma_timing = 0;
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if (speed >= XFER_PIO_0 && speed <= XFER_PIO_4) {
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svwks_tune_pio(drive, speed - XFER_PIO_0);
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return ide_config_drive_speed(drive, speed);
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}
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/* If we are about to put a disk into UDMA mode we screwed up.
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Our code assumes we never _ever_ do this on an OSB4 */
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if(dev->device == PCI_DEVICE_ID_SERVERWORKS_OSB4 &&
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drive->media == ide_disk && speed >= XFER_UDMA_0)
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BUG();
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pci_read_config_byte(dev, (0x56|hwif->channel), &ultra_timing);
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pci_read_config_byte(dev, 0x54, &ultra_enable);
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ultra_timing &= ~(0x0F << (4*unit));
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ultra_enable &= ~(0x01 << drive->dn);
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switch(speed) {
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case XFER_MW_DMA_2:
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case XFER_MW_DMA_1:
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case XFER_MW_DMA_0:
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dma_timing |= dma_modes[speed - XFER_MW_DMA_0];
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break;
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case XFER_UDMA_5:
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case XFER_UDMA_4:
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case XFER_UDMA_3:
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case XFER_UDMA_2:
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case XFER_UDMA_1:
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case XFER_UDMA_0:
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dma_timing |= dma_modes[2];
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ultra_timing |= ((udma_modes[speed - XFER_UDMA_0]) << (4*unit));
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ultra_enable |= (0x01 << drive->dn);
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default:
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break;
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}
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pci_write_config_byte(dev, drive_pci2[drive->dn], dma_timing);
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pci_write_config_byte(dev, (0x56|hwif->channel), ultra_timing);
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pci_write_config_byte(dev, 0x54, ultra_enable);
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return (ide_config_drive_speed(drive, speed));
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}
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static void svwks_tune_drive (ide_drive_t *drive, u8 pio)
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{
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pio = ide_get_best_pio_mode(drive, pio, 4, NULL);
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svwks_tune_pio(drive, pio);
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(void)ide_config_drive_speed(drive, XFER_PIO_0 + pio);
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}
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static int svwks_config_drive_xfer_rate (ide_drive_t *drive)
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{
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drive->init_speed = 0;
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if (ide_tune_dma(drive))
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return 0;
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if (ide_use_fast_pio(drive))
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svwks_tune_drive(drive, 255);
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return -1;
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}
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static unsigned int __devinit init_chipset_svwks (struct pci_dev *dev, const char *name)
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{
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unsigned int reg;
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u8 btr;
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/* force Master Latency Timer value to 64 PCICLKs */
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pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0x40);
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/* OSB4 : South Bridge and IDE */
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if (dev->device == PCI_DEVICE_ID_SERVERWORKS_OSB4IDE) {
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isa_dev = pci_get_device(PCI_VENDOR_ID_SERVERWORKS,
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PCI_DEVICE_ID_SERVERWORKS_OSB4, NULL);
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if (isa_dev) {
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pci_read_config_dword(isa_dev, 0x64, ®);
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reg &= ~0x00002000; /* disable 600ns interrupt mask */
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if(!(reg & 0x00004000))
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printk(KERN_DEBUG "%s: UDMA not BIOS enabled.\n", name);
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reg |= 0x00004000; /* enable UDMA/33 support */
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pci_write_config_dword(isa_dev, 0x64, reg);
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}
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}
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/* setup CSB5/CSB6 : South Bridge and IDE option RAID */
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else if ((dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE) ||
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(dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) ||
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(dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2)) {
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/* Third Channel Test */
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if (!(PCI_FUNC(dev->devfn) & 1)) {
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struct pci_dev * findev = NULL;
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u32 reg4c = 0;
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findev = pci_get_device(PCI_VENDOR_ID_SERVERWORKS,
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PCI_DEVICE_ID_SERVERWORKS_CSB5, NULL);
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if (findev) {
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pci_read_config_dword(findev, 0x4C, ®4c);
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reg4c &= ~0x000007FF;
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reg4c |= 0x00000040;
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reg4c |= 0x00000020;
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pci_write_config_dword(findev, 0x4C, reg4c);
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pci_dev_put(findev);
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}
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outb_p(0x06, 0x0c00);
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dev->irq = inb_p(0x0c01);
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} else {
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struct pci_dev * findev = NULL;
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u8 reg41 = 0;
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findev = pci_get_device(PCI_VENDOR_ID_SERVERWORKS,
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PCI_DEVICE_ID_SERVERWORKS_CSB6, NULL);
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if (findev) {
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pci_read_config_byte(findev, 0x41, ®41);
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reg41 &= ~0x40;
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pci_write_config_byte(findev, 0x41, reg41);
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pci_dev_put(findev);
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}
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/*
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* This is a device pin issue on CSB6.
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* Since there will be a future raid mode,
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* early versions of the chipset require the
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* interrupt pin to be set, and it is a compatibility
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* mode issue.
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*/
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if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE)
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dev->irq = 0;
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}
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// pci_read_config_dword(dev, 0x40, &pioreg)
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// pci_write_config_dword(dev, 0x40, 0x99999999);
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// pci_read_config_dword(dev, 0x44, &dmareg);
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// pci_write_config_dword(dev, 0x44, 0xFFFFFFFF);
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/* setup the UDMA Control register
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*
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* 1. clear bit 6 to enable DMA
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* 2. enable DMA modes with bits 0-1
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* 00 : legacy
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* 01 : udma2
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* 10 : udma2/udma4
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* 11 : udma2/udma4/udma5
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*/
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pci_read_config_byte(dev, 0x5A, &btr);
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btr &= ~0x40;
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if (!(PCI_FUNC(dev->devfn) & 1))
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btr |= 0x2;
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else
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btr |= (dev->revision >= SVWKS_CSB5_REVISION_NEW) ? 0x3 : 0x2;
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pci_write_config_byte(dev, 0x5A, btr);
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}
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/* Setup HT1000 SouthBridge Controller - Single Channel Only */
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else if (dev->device == PCI_DEVICE_ID_SERVERWORKS_HT1000IDE) {
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pci_read_config_byte(dev, 0x5A, &btr);
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btr &= ~0x40;
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btr |= 0x3;
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pci_write_config_byte(dev, 0x5A, btr);
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}
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return dev->irq;
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}
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static u8 __devinit ata66_svwks_svwks(ide_hwif_t *hwif)
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{
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return ATA_CBL_PATA80;
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}
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/* On Dell PowerEdge servers with a CSB5/CSB6, the top two bits
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* of the subsystem device ID indicate presence of an 80-pin cable.
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* Bit 15 clear = secondary IDE channel does not have 80-pin cable.
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* Bit 15 set = secondary IDE channel has 80-pin cable.
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* Bit 14 clear = primary IDE channel does not have 80-pin cable.
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* Bit 14 set = primary IDE channel has 80-pin cable.
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*/
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static u8 __devinit ata66_svwks_dell(ide_hwif_t *hwif)
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{
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struct pci_dev *dev = hwif->pci_dev;
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if (dev->subsystem_vendor == PCI_VENDOR_ID_DELL &&
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dev->vendor == PCI_VENDOR_ID_SERVERWORKS &&
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(dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE ||
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dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE))
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return ((1 << (hwif->channel + 14)) &
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dev->subsystem_device) ? ATA_CBL_PATA80 : ATA_CBL_PATA40;
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return ATA_CBL_PATA40;
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}
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/* Sun Cobalt Alpine hardware avoids the 80-pin cable
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* detect issue by attaching the drives directly to the board.
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* This check follows the Dell precedent (how scary is that?!)
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*
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* WARNING: this only works on Alpine hardware!
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*/
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static u8 __devinit ata66_svwks_cobalt(ide_hwif_t *hwif)
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{
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struct pci_dev *dev = hwif->pci_dev;
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if (dev->subsystem_vendor == PCI_VENDOR_ID_SUN &&
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dev->vendor == PCI_VENDOR_ID_SERVERWORKS &&
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dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE)
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return ((1 << (hwif->channel + 14)) &
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dev->subsystem_device) ? ATA_CBL_PATA80 : ATA_CBL_PATA40;
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return ATA_CBL_PATA40;
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}
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static u8 __devinit ata66_svwks(ide_hwif_t *hwif)
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{
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struct pci_dev *dev = hwif->pci_dev;
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/* Server Works */
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if (dev->subsystem_vendor == PCI_VENDOR_ID_SERVERWORKS)
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return ata66_svwks_svwks (hwif);
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/* Dell PowerEdge */
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if (dev->subsystem_vendor == PCI_VENDOR_ID_DELL)
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return ata66_svwks_dell (hwif);
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/* Cobalt Alpine */
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if (dev->subsystem_vendor == PCI_VENDOR_ID_SUN)
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return ata66_svwks_cobalt (hwif);
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/* Per Specified Design by OEM, and ASIC Architect */
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if ((dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) ||
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(dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2))
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return ATA_CBL_PATA80;
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return ATA_CBL_PATA40;
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}
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static void __devinit init_hwif_svwks (ide_hwif_t *hwif)
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{
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if (!hwif->irq)
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hwif->irq = hwif->channel ? 15 : 14;
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hwif->tuneproc = &svwks_tune_drive;
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hwif->speedproc = &svwks_tune_chipset;
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hwif->udma_filter = &svwks_udma_filter;
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hwif->atapi_dma = 1;
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if (hwif->pci_dev->device != PCI_DEVICE_ID_SERVERWORKS_OSB4IDE)
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hwif->ultra_mask = 0x3f;
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hwif->mwdma_mask = 0x07;
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hwif->autodma = 0;
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hwif->drives[0].autotune = 1;
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hwif->drives[1].autotune = 1;
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if (!hwif->dma_base)
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return;
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hwif->ide_dma_check = &svwks_config_drive_xfer_rate;
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if (hwif->pci_dev->device != PCI_DEVICE_ID_SERVERWORKS_OSB4IDE) {
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if (hwif->cbl != ATA_CBL_PATA40_SHORT)
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hwif->cbl = ata66_svwks(hwif);
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}
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if (!noautodma)
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hwif->autodma = 1;
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hwif->drives[0].autodma = hwif->drives[1].autodma = 1;
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}
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static int __devinit init_setup_svwks (struct pci_dev *dev, ide_pci_device_t *d)
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{
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return ide_setup_pci_device(dev, d);
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}
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static int __devinit init_setup_csb6 (struct pci_dev *dev, ide_pci_device_t *d)
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{
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if (!(PCI_FUNC(dev->devfn) & 1)) {
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d->bootable = NEVER_BOARD;
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if (dev->resource[0].start == 0x01f1)
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d->bootable = ON_BOARD;
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}
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if ((dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE ||
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dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2) &&
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(!(PCI_FUNC(dev->devfn) & 1)))
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d->host_flags |= IDE_HFLAG_SINGLE;
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else
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d->host_flags &= ~IDE_HFLAG_SINGLE;
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return ide_setup_pci_device(dev, d);
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}
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static ide_pci_device_t serverworks_chipsets[] __devinitdata = {
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{ /* 0 */
|
|
.name = "SvrWks OSB4",
|
|
.init_setup = init_setup_svwks,
|
|
.init_chipset = init_chipset_svwks,
|
|
.init_hwif = init_hwif_svwks,
|
|
.autodma = AUTODMA,
|
|
.bootable = ON_BOARD,
|
|
},{ /* 1 */
|
|
.name = "SvrWks CSB5",
|
|
.init_setup = init_setup_svwks,
|
|
.init_chipset = init_chipset_svwks,
|
|
.init_hwif = init_hwif_svwks,
|
|
.autodma = AUTODMA,
|
|
.bootable = ON_BOARD,
|
|
},{ /* 2 */
|
|
.name = "SvrWks CSB6",
|
|
.init_setup = init_setup_csb6,
|
|
.init_chipset = init_chipset_svwks,
|
|
.init_hwif = init_hwif_svwks,
|
|
.autodma = AUTODMA,
|
|
.bootable = ON_BOARD,
|
|
},{ /* 3 */
|
|
.name = "SvrWks CSB6",
|
|
.init_setup = init_setup_csb6,
|
|
.init_chipset = init_chipset_svwks,
|
|
.init_hwif = init_hwif_svwks,
|
|
.autodma = AUTODMA,
|
|
.bootable = ON_BOARD,
|
|
.host_flags = IDE_HFLAG_SINGLE,
|
|
},{ /* 4 */
|
|
.name = "SvrWks HT1000",
|
|
.init_setup = init_setup_svwks,
|
|
.init_chipset = init_chipset_svwks,
|
|
.init_hwif = init_hwif_svwks,
|
|
.autodma = AUTODMA,
|
|
.bootable = ON_BOARD,
|
|
.host_flags = IDE_HFLAG_SINGLE,
|
|
}
|
|
};
|
|
|
|
/**
|
|
* svwks_init_one - called when a OSB/CSB is found
|
|
* @dev: the svwks device
|
|
* @id: the matching pci id
|
|
*
|
|
* Called when the PCI registration layer (or the IDE initialization)
|
|
* finds a device matching our IDE device tables.
|
|
*/
|
|
|
|
static int __devinit svwks_init_one(struct pci_dev *dev, const struct pci_device_id *id)
|
|
{
|
|
ide_pci_device_t *d = &serverworks_chipsets[id->driver_data];
|
|
|
|
return d->init_setup(dev, d);
|
|
}
|
|
|
|
static struct pci_device_id svwks_pci_tbl[] = {
|
|
{ PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_OSB4IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
|
|
{ PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB5IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1},
|
|
{ PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB6IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 2},
|
|
{ PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 3},
|
|
{ PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_HT1000IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 4},
|
|
{ 0, },
|
|
};
|
|
MODULE_DEVICE_TABLE(pci, svwks_pci_tbl);
|
|
|
|
static struct pci_driver driver = {
|
|
.name = "Serverworks_IDE",
|
|
.id_table = svwks_pci_tbl,
|
|
.probe = svwks_init_one,
|
|
};
|
|
|
|
static int __init svwks_ide_init(void)
|
|
{
|
|
return ide_pci_register_driver(&driver);
|
|
}
|
|
|
|
module_init(svwks_ide_init);
|
|
|
|
MODULE_AUTHOR("Michael Aubry. Andrzej Krzysztofowicz, Andre Hedrick");
|
|
MODULE_DESCRIPTION("PCI driver module for Serverworks OSB4/CSB5/CSB6 IDE");
|
|
MODULE_LICENSE("GPL");
|