316 lines
8.6 KiB
C
316 lines
8.6 KiB
C
/*
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* pata_atiixp.c - ATI 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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*
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* Based on
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*
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* linux/drivers/ide/pci/atiixp.c Version 0.01-bart2 Feb. 26, 2004
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*
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* Copyright (C) 2003 ATI Inc. <hyu@ati.com>
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* Copyright (C) 2004 Bartlomiej Zolnierkiewicz
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*
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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_atiixp"
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#define DRV_VERSION "0.4.4"
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enum {
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ATIIXP_IDE_PIO_TIMING = 0x40,
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ATIIXP_IDE_MWDMA_TIMING = 0x44,
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ATIIXP_IDE_PIO_CONTROL = 0x48,
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ATIIXP_IDE_PIO_MODE = 0x4a,
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ATIIXP_IDE_UDMA_CONTROL = 0x54,
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ATIIXP_IDE_UDMA_MODE = 0x56
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};
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static int atiixp_pre_reset(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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static const struct pci_bits atiixp_enable_bits[] = {
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{ 0x48, 1, 0x01, 0x00 },
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{ 0x48, 1, 0x08, 0x00 }
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};
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u8 udma;
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if (!pci_test_config_bits(pdev, &atiixp_enable_bits[ap->port_no]))
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return -ENOENT;
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/* Hack from drivers/ide/pci. Really we want to know how to do the
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raw detection not play follow the bios mode guess */
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pci_read_config_byte(pdev, ATIIXP_IDE_UDMA_MODE + ap->port_no, &udma);
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if ((udma & 0x07) >= 0x04 || (udma & 0x70) >= 0x40)
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ap->cbl = ATA_CBL_PATA80;
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else
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ap->cbl = ATA_CBL_PATA40;
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return ata_std_prereset(ap);
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}
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static void atiixp_error_handler(struct ata_port *ap)
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{
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ata_bmdma_drive_eh(ap, atiixp_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
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}
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/**
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* atiixp_set_pio_timing - 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 by both the pio and dma setup functions to set the controller
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* timings for PIO transfers. We must load both the mode number and
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* timing values into the controller.
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*/
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static void atiixp_set_pio_timing(struct ata_port *ap, struct ata_device *adev, int pio)
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{
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static u8 pio_timings[5] = { 0x5D, 0x47, 0x34, 0x22, 0x20 };
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struct pci_dev *pdev = to_pci_dev(ap->host->dev);
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int dn = 2 * ap->port_no + adev->devno;
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/* Check this is correct - the order is odd in both drivers */
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int timing_shift = (16 * ap->port_no) + 8 * (adev->devno ^ 1);
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u16 pio_mode_data, pio_timing_data;
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pci_read_config_word(pdev, ATIIXP_IDE_PIO_MODE, &pio_mode_data);
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pio_mode_data &= ~(0x7 << (4 * dn));
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pio_mode_data |= pio << (4 * dn);
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pci_write_config_word(pdev, ATIIXP_IDE_PIO_MODE, pio_mode_data);
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pci_read_config_word(pdev, ATIIXP_IDE_PIO_TIMING, &pio_timing_data);
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pio_mode_data &= ~(0xFF << timing_shift);
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pio_mode_data |= (pio_timings[pio] << timing_shift);
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pci_write_config_word(pdev, ATIIXP_IDE_PIO_TIMING, pio_timing_data);
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}
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/**
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* atiixp_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. We use a shared helper for this
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* as the DMA setup must also adjust the PIO timing information.
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*/
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static void atiixp_set_piomode(struct ata_port *ap, struct ata_device *adev)
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{
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atiixp_set_pio_timing(ap, adev, adev->pio_mode - XFER_PIO_0);
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}
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/**
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* atiixp_set_dmamode - set initial DMA 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 DMA mode setup. We use timing tables for most
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* modes but must tune an appropriate PIO mode to match.
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*/
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static void atiixp_set_dmamode(struct ata_port *ap, struct ata_device *adev)
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{
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static u8 mwdma_timings[5] = { 0x77, 0x21, 0x20 };
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struct pci_dev *pdev = to_pci_dev(ap->host->dev);
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int dma = adev->dma_mode;
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int dn = 2 * ap->port_no + adev->devno;
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int wanted_pio;
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if (adev->dma_mode >= XFER_UDMA_0) {
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u16 udma_mode_data;
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dma -= XFER_UDMA_0;
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pci_read_config_word(pdev, ATIIXP_IDE_UDMA_MODE, &udma_mode_data);
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udma_mode_data &= ~(0x7 << (4 * dn));
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udma_mode_data |= dma << (4 * dn);
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pci_write_config_word(pdev, ATIIXP_IDE_UDMA_MODE, udma_mode_data);
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} else {
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u16 mwdma_timing_data;
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/* Check this is correct - the order is odd in both drivers */
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int timing_shift = (16 * ap->port_no) + 8 * (adev->devno ^ 1);
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dma -= XFER_MW_DMA_0;
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pci_read_config_word(pdev, ATIIXP_IDE_MWDMA_TIMING, &mwdma_timing_data);
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mwdma_timing_data &= ~(0xFF << timing_shift);
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mwdma_timing_data |= (mwdma_timings[dma] << timing_shift);
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pci_write_config_word(pdev, ATIIXP_IDE_MWDMA_TIMING, mwdma_timing_data);
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}
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/*
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* We must now look at the PIO mode situation. We may need to
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* adjust the PIO mode to keep the timings acceptable
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*/
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if (adev->dma_mode >= XFER_MW_DMA_2)
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wanted_pio = 4;
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else if (adev->dma_mode == XFER_MW_DMA_1)
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wanted_pio = 3;
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else if (adev->dma_mode == XFER_MW_DMA_0)
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wanted_pio = 0;
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else BUG();
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if (adev->pio_mode != wanted_pio)
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atiixp_set_pio_timing(ap, adev, wanted_pio);
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}
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/**
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* atiixp_bmdma_start - DMA start callback
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* @qc: Command in progress
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*
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* When DMA begins we need to ensure that the UDMA control
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* register for the channel is correctly set.
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*/
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static void atiixp_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 pci_dev *pdev = to_pci_dev(ap->host->dev);
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int dn = (2 * ap->port_no) + adev->devno;
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u16 tmp16;
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pci_read_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, &tmp16);
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if (adev->dma_mode >= XFER_UDMA_0)
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tmp16 |= (1 << dn);
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else
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tmp16 &= ~(1 << dn);
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pci_write_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, tmp16);
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ata_bmdma_start(qc);
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}
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/**
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* atiixp_dma_stop - DMA stop callback
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* @qc: Command in progress
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*
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* DMA has completed. Clear the UDMA flag as the next operations will
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* be PIO ones not UDMA data transfer.
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*/
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static void atiixp_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 pci_dev *pdev = to_pci_dev(ap->host->dev);
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int dn = (2 * ap->port_no) + qc->dev->devno;
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u16 tmp16;
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pci_read_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, &tmp16);
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tmp16 &= ~(1 << dn);
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pci_write_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, tmp16);
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ata_bmdma_stop(qc);
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}
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static struct scsi_host_template atiixp_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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.resume = ata_scsi_device_resume,
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.suspend = ata_scsi_device_suspend,
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};
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static struct ata_port_operations atiixp_port_ops = {
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.port_disable = ata_port_disable,
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.set_piomode = atiixp_set_piomode,
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.set_dmamode = atiixp_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 = atiixp_error_handler,
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.post_internal_cmd = ata_bmdma_post_internal_cmd,
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.bmdma_setup = ata_bmdma_setup,
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.bmdma_start = atiixp_bmdma_start,
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.bmdma_stop = atiixp_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_pio_data_xfer,
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.irq_handler = ata_interrupt,
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.irq_clear = ata_bmdma_irq_clear,
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.port_start = ata_port_start,
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.port_stop = ata_port_stop,
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.host_stop = ata_host_stop
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};
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static int atiixp_init_one(struct pci_dev *dev, const struct pci_device_id *id)
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{
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static struct ata_port_info info = {
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.sht = &atiixp_sht,
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.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
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.pio_mask = 0x1f,
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.mwdma_mask = 0x06, /* No MWDMA0 support */
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.udma_mask = 0x3F,
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.port_ops = &atiixp_port_ops
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};
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static struct ata_port_info *port_info[2] = { &info, &info };
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return ata_pci_init_one(dev, port_info, 2);
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}
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static const struct pci_device_id atiixp[] = {
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{ PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP200_IDE), },
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{ PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP300_IDE), },
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{ PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP400_IDE), },
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{ PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP600_IDE), },
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{ },
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};
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static struct pci_driver atiixp_pci_driver = {
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.name = DRV_NAME,
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.id_table = atiixp,
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.probe = atiixp_init_one,
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.remove = ata_pci_remove_one,
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.resume = ata_pci_device_resume,
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.suspend = ata_pci_device_suspend,
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};
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static int __init atiixp_init(void)
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{
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return pci_register_driver(&atiixp_pci_driver);
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}
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static void __exit atiixp_exit(void)
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{
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pci_unregister_driver(&atiixp_pci_driver);
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}
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MODULE_AUTHOR("Alan Cox");
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MODULE_DESCRIPTION("low-level driver for ATI IXP200/300/400");
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MODULE_LICENSE("GPL");
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MODULE_DEVICE_TABLE(pci, atiixp);
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MODULE_VERSION(DRV_VERSION);
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module_init(atiixp_init);
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module_exit(atiixp_exit);
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