06b74dd28f
I've been doing an audit of this driver to try and find out why we have problems with some Clevo boxes that use it. Didn't get anywhere other than to discover all the bug reporters I have use vmware, which may or may not be chance. In the process however I did find out our MWDMA2 performance was a bit low and code review showed the MWDMA0/2 timings are reversed due to a thinko in the table ordering Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
402 lines
10 KiB
C
402 lines
10 KiB
C
/*
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* pata_pdc202xx_old.c - Promise PDC202xx PATA for new ATA layer
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* (C) 2005 Red Hat Inc
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* Alan Cox <alan@redhat.com>
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* (C) 2007 Bartlomiej Zolnierkiewicz
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*
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* Based in part on linux/drivers/ide/pci/pdc202xx_old.c
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*
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* First cut with LBA48/ATAPI
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*
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* TODO:
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* Channel interlock/reset on both required ?
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <linux/init.h>
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#include <linux/blkdev.h>
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#include <linux/delay.h>
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#include <scsi/scsi_host.h>
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#include <linux/libata.h>
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#define DRV_NAME "pata_pdc202xx_old"
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#define DRV_VERSION "0.4.3"
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static int pdc2026x_cable_detect(struct ata_port *ap)
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{
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struct pci_dev *pdev = to_pci_dev(ap->host->dev);
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u16 cis;
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pci_read_config_word(pdev, 0x50, &cis);
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if (cis & (1 << (10 + ap->port_no)))
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return ATA_CBL_PATA40;
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return ATA_CBL_PATA80;
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}
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/**
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* pdc202xx_configure_piomode - set chip PIO timing
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* @ap: ATA interface
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* @adev: ATA device
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* @pio: PIO mode
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*
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* Called to do the PIO mode setup. Our timing registers are shared
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* so a configure_dmamode call will undo any work we do here and vice
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* versa
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*/
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static void pdc202xx_configure_piomode(struct ata_port *ap, struct ata_device *adev, int pio)
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{
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struct pci_dev *pdev = to_pci_dev(ap->host->dev);
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int port = 0x60 + 8 * ap->port_no + 4 * adev->devno;
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static u16 pio_timing[5] = {
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0x0913, 0x050C , 0x0308, 0x0206, 0x0104
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};
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u8 r_ap, r_bp;
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pci_read_config_byte(pdev, port, &r_ap);
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pci_read_config_byte(pdev, port + 1, &r_bp);
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r_ap &= ~0x3F; /* Preserve ERRDY_EN, SYNC_IN */
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r_bp &= ~0x1F;
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r_ap |= (pio_timing[pio] >> 8);
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r_bp |= (pio_timing[pio] & 0xFF);
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if (ata_pio_need_iordy(adev))
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r_ap |= 0x20; /* IORDY enable */
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if (adev->class == ATA_DEV_ATA)
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r_ap |= 0x10; /* FIFO enable */
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pci_write_config_byte(pdev, port, r_ap);
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pci_write_config_byte(pdev, port + 1, r_bp);
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}
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/**
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* pdc202xx_set_piomode - set initial PIO mode data
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* @ap: ATA interface
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* @adev: ATA device
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*
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* Called to do the PIO mode setup. Our timing registers are shared
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* but we want to set the PIO timing by default.
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*/
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static void pdc202xx_set_piomode(struct ata_port *ap, struct ata_device *adev)
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{
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pdc202xx_configure_piomode(ap, adev, adev->pio_mode - XFER_PIO_0);
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}
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/**
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* pdc202xx_configure_dmamode - set DMA mode in chip
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* @ap: ATA interface
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* @adev: ATA device
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*
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* Load DMA cycle times into the chip ready for a DMA transfer
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* to occur.
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*/
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static void pdc202xx_set_dmamode(struct ata_port *ap, struct ata_device *adev)
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{
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struct pci_dev *pdev = to_pci_dev(ap->host->dev);
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int port = 0x60 + 8 * ap->port_no + 4 * adev->devno;
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static u8 udma_timing[6][2] = {
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{ 0x60, 0x03 }, /* 33 Mhz Clock */
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{ 0x40, 0x02 },
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{ 0x20, 0x01 },
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{ 0x40, 0x02 }, /* 66 Mhz Clock */
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{ 0x20, 0x01 },
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{ 0x20, 0x01 }
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};
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static u8 mdma_timing[3][2] = {
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{ 0xe0, 0x0f },
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{ 0x60, 0x04 },
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{ 0x60, 0x03 },
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};
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u8 r_bp, r_cp;
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pci_read_config_byte(pdev, port + 1, &r_bp);
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pci_read_config_byte(pdev, port + 2, &r_cp);
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r_bp &= ~0xE0;
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r_cp &= ~0x0F;
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if (adev->dma_mode >= XFER_UDMA_0) {
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int speed = adev->dma_mode - XFER_UDMA_0;
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r_bp |= udma_timing[speed][0];
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r_cp |= udma_timing[speed][1];
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} else {
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int speed = adev->dma_mode - XFER_MW_DMA_0;
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r_bp |= mdma_timing[speed][0];
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r_cp |= mdma_timing[speed][1];
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}
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pci_write_config_byte(pdev, port + 1, r_bp);
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pci_write_config_byte(pdev, port + 2, r_cp);
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}
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/**
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* pdc2026x_bmdma_start - DMA engine begin
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* @qc: ATA command
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*
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* In UDMA3 or higher we have to clock switch for the duration of the
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* DMA transfer sequence.
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*
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* Note: The host lock held by the libata layer protects
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* us from two channels both trying to set DMA bits at once
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*/
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static void pdc2026x_bmdma_start(struct ata_queued_cmd *qc)
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{
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struct ata_port *ap = qc->ap;
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struct ata_device *adev = qc->dev;
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struct ata_taskfile *tf = &qc->tf;
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int sel66 = ap->port_no ? 0x08: 0x02;
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void __iomem *master = ap->host->ports[0]->ioaddr.bmdma_addr;
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void __iomem *clock = master + 0x11;
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void __iomem *atapi_reg = master + 0x20 + (4 * ap->port_no);
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u32 len;
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/* Check we keep host level locking here */
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if (adev->dma_mode >= XFER_UDMA_2)
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iowrite8(ioread8(clock) | sel66, clock);
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else
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iowrite8(ioread8(clock) & ~sel66, clock);
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/* The DMA clocks may have been trashed by a reset. FIXME: make conditional
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and move to qc_issue ? */
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pdc202xx_set_dmamode(ap, qc->dev);
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/* Cases the state machine will not complete correctly without help */
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if ((tf->flags & ATA_TFLAG_LBA48) || tf->protocol == ATA_PROT_ATAPI_DMA)
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{
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len = qc->nbytes / 2;
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if (tf->flags & ATA_TFLAG_WRITE)
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len |= 0x06000000;
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else
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len |= 0x05000000;
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iowrite32(len, atapi_reg);
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}
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/* Activate DMA */
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ata_bmdma_start(qc);
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}
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/**
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* pdc2026x_bmdma_end - DMA engine stop
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* @qc: ATA command
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*
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* After a DMA completes we need to put the clock back to 33MHz for
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* PIO timings.
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*
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* Note: The host lock held by the libata layer protects
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* us from two channels both trying to set DMA bits at once
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*/
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static void pdc2026x_bmdma_stop(struct ata_queued_cmd *qc)
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{
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struct ata_port *ap = qc->ap;
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struct ata_device *adev = qc->dev;
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struct ata_taskfile *tf = &qc->tf;
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int sel66 = ap->port_no ? 0x08: 0x02;
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/* The clock bits are in the same register for both channels */
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void __iomem *master = ap->host->ports[0]->ioaddr.bmdma_addr;
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void __iomem *clock = master + 0x11;
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void __iomem *atapi_reg = master + 0x20 + (4 * ap->port_no);
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/* Cases the state machine will not complete correctly */
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if (tf->protocol == ATA_PROT_ATAPI_DMA || ( tf->flags & ATA_TFLAG_LBA48)) {
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iowrite32(0, atapi_reg);
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iowrite8(ioread8(clock) & ~sel66, clock);
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}
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/* Flip back to 33Mhz for PIO */
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if (adev->dma_mode >= XFER_UDMA_2)
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iowrite8(ioread8(clock) & ~sel66, clock);
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ata_bmdma_stop(qc);
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}
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/**
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* pdc2026x_dev_config - device setup hook
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* @adev: newly found device
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*
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* Perform chip specific early setup. We need to lock the transfer
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* sizes to 8bit to avoid making the state engine on the 2026x cards
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* barf.
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*/
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static void pdc2026x_dev_config(struct ata_device *adev)
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{
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adev->max_sectors = 256;
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}
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static struct scsi_host_template pdc202xx_sht = {
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.module = THIS_MODULE,
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.name = DRV_NAME,
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.ioctl = ata_scsi_ioctl,
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.queuecommand = ata_scsi_queuecmd,
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.can_queue = ATA_DEF_QUEUE,
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.this_id = ATA_SHT_THIS_ID,
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.sg_tablesize = LIBATA_MAX_PRD,
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.cmd_per_lun = ATA_SHT_CMD_PER_LUN,
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.emulated = ATA_SHT_EMULATED,
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.use_clustering = ATA_SHT_USE_CLUSTERING,
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.proc_name = DRV_NAME,
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.dma_boundary = ATA_DMA_BOUNDARY,
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.slave_configure = ata_scsi_slave_config,
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.slave_destroy = ata_scsi_slave_destroy,
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.bios_param = ata_std_bios_param,
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};
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static struct ata_port_operations pdc2024x_port_ops = {
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.set_piomode = pdc202xx_set_piomode,
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.set_dmamode = pdc202xx_set_dmamode,
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.mode_filter = ata_pci_default_filter,
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.tf_load = ata_tf_load,
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.tf_read = ata_tf_read,
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.check_status = ata_check_status,
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.exec_command = ata_exec_command,
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.dev_select = ata_std_dev_select,
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.freeze = ata_bmdma_freeze,
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.thaw = ata_bmdma_thaw,
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.error_handler = ata_bmdma_error_handler,
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.post_internal_cmd = ata_bmdma_post_internal_cmd,
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.cable_detect = ata_cable_40wire,
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.bmdma_setup = ata_bmdma_setup,
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.bmdma_start = ata_bmdma_start,
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.bmdma_stop = ata_bmdma_stop,
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.bmdma_status = ata_bmdma_status,
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.qc_prep = ata_qc_prep,
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.qc_issue = ata_qc_issue_prot,
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.data_xfer = ata_data_xfer,
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.irq_handler = ata_interrupt,
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.irq_clear = ata_bmdma_irq_clear,
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.irq_on = ata_irq_on,
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.port_start = ata_sff_port_start,
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};
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static struct ata_port_operations pdc2026x_port_ops = {
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.set_piomode = pdc202xx_set_piomode,
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.set_dmamode = pdc202xx_set_dmamode,
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.mode_filter = ata_pci_default_filter,
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.tf_load = ata_tf_load,
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.tf_read = ata_tf_read,
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.check_status = ata_check_status,
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.exec_command = ata_exec_command,
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.dev_select = ata_std_dev_select,
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.dev_config = pdc2026x_dev_config,
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.freeze = ata_bmdma_freeze,
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.thaw = ata_bmdma_thaw,
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.error_handler = ata_bmdma_error_handler,
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.post_internal_cmd = ata_bmdma_post_internal_cmd,
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.cable_detect = pdc2026x_cable_detect,
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.bmdma_setup = ata_bmdma_setup,
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.bmdma_start = pdc2026x_bmdma_start,
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.bmdma_stop = pdc2026x_bmdma_stop,
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.bmdma_status = ata_bmdma_status,
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.qc_prep = ata_qc_prep,
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.qc_issue = ata_qc_issue_prot,
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.data_xfer = ata_data_xfer,
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.irq_handler = ata_interrupt,
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.irq_clear = ata_bmdma_irq_clear,
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.irq_on = ata_irq_on,
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.port_start = ata_sff_port_start,
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};
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static int pdc202xx_init_one(struct pci_dev *dev, const struct pci_device_id *id)
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{
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static const struct ata_port_info info[3] = {
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{
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.sht = &pdc202xx_sht,
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.flags = ATA_FLAG_SLAVE_POSS,
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.pio_mask = 0x1f,
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.mwdma_mask = 0x07,
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.udma_mask = ATA_UDMA2,
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.port_ops = &pdc2024x_port_ops
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},
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{
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.sht = &pdc202xx_sht,
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.flags = ATA_FLAG_SLAVE_POSS,
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.pio_mask = 0x1f,
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.mwdma_mask = 0x07,
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.udma_mask = ATA_UDMA4,
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.port_ops = &pdc2026x_port_ops
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},
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{
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.sht = &pdc202xx_sht,
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.flags = ATA_FLAG_SLAVE_POSS,
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.pio_mask = 0x1f,
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.mwdma_mask = 0x07,
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.udma_mask = ATA_UDMA5,
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.port_ops = &pdc2026x_port_ops
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}
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};
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const struct ata_port_info *ppi[] = { &info[id->driver_data], NULL };
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if (dev->device == PCI_DEVICE_ID_PROMISE_20265) {
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struct pci_dev *bridge = dev->bus->self;
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/* Don't grab anything behind a Promise I2O RAID */
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if (bridge && bridge->vendor == PCI_VENDOR_ID_INTEL) {
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if( bridge->device == PCI_DEVICE_ID_INTEL_I960)
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return -ENODEV;
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if( bridge->device == PCI_DEVICE_ID_INTEL_I960RM)
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return -ENODEV;
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}
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}
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return ata_pci_init_one(dev, ppi);
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}
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static const struct pci_device_id pdc202xx[] = {
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{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20246), 0 },
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{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20262), 1 },
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{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20263), 1 },
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{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20265), 2 },
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{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20267), 2 },
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{ },
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};
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static struct pci_driver pdc202xx_pci_driver = {
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.name = DRV_NAME,
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.id_table = pdc202xx,
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.probe = pdc202xx_init_one,
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.remove = ata_pci_remove_one,
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#ifdef CONFIG_PM
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.suspend = ata_pci_device_suspend,
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.resume = ata_pci_device_resume,
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#endif
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};
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static int __init pdc202xx_init(void)
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{
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return pci_register_driver(&pdc202xx_pci_driver);
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}
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static void __exit pdc202xx_exit(void)
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{
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pci_unregister_driver(&pdc202xx_pci_driver);
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}
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MODULE_AUTHOR("Alan Cox");
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MODULE_DESCRIPTION("low-level driver for Promise 2024x and 20262-20267");
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MODULE_LICENSE("GPL");
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MODULE_DEVICE_TABLE(pci, pdc202xx);
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MODULE_VERSION(DRV_VERSION);
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module_init(pdc202xx_init);
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module_exit(pdc202xx_exit);
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