319 lines
8.7 KiB
C
319 lines
8.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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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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* (C) 2009-2010 Bartlomiej Zolnierkiewicz
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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/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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#include <linux/dmi.h>
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#define DRV_NAME "pata_atiixp"
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#define DRV_VERSION "0.4.6"
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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 const struct dmi_system_id attixp_cable_override_dmi_table[] = {
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{
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/* Board has onboard PATA<->SATA converters */
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.ident = "MSI E350DM-E33",
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.matches = {
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DMI_MATCH(DMI_BOARD_VENDOR, "MSI"),
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DMI_MATCH(DMI_BOARD_NAME, "E350DM-E33(MS-7720)"),
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},
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},
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{ }
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};
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static int atiixp_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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u8 udma;
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if (dmi_check_system(attixp_cable_override_dmi_table))
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return ATA_CBL_PATA40_SHORT;
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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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return ATA_CBL_PATA80;
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return ATA_CBL_PATA40;
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}
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static DEFINE_SPINLOCK(atiixp_lock);
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/**
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* atiixp_prereset - perform reset handling
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* @link: ATA link
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* @deadline: deadline jiffies for the operation
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*
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* Reset sequence checking enable bits to see which ports are
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* active.
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*/
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static int atiixp_prereset(struct ata_link *link, unsigned long deadline)
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{
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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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struct ata_port *ap = link->ap;
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struct pci_dev *pdev = to_pci_dev(ap->host->dev);
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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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return ata_sff_prereset(link, deadline);
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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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int timing_shift = (16 * ap->port_no) + 8 * (adev->devno ^ 1);
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u32 pio_timing_data;
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u16 pio_mode_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_dword(pdev, ATIIXP_IDE_PIO_TIMING, &pio_timing_data);
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pio_timing_data &= ~(0xFF << timing_shift);
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pio_timing_data |= (pio_timings[pio] << timing_shift);
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pci_write_config_dword(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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unsigned long flags;
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spin_lock_irqsave(&atiixp_lock, flags);
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atiixp_set_pio_timing(ap, adev, adev->pio_mode - XFER_PIO_0);
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spin_unlock_irqrestore(&atiixp_lock, flags);
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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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unsigned long flags;
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spin_lock_irqsave(&atiixp_lock, flags);
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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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int timing_shift = (16 * ap->port_no) + 8 * (adev->devno ^ 1);
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u32 mwdma_timing_data;
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dma -= XFER_MW_DMA_0;
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pci_read_config_dword(pdev, ATIIXP_IDE_MWDMA_TIMING,
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&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_dword(pdev, ATIIXP_IDE_MWDMA_TIMING,
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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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spin_unlock_irqrestore(&atiixp_lock, flags);
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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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* 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 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 (ata_using_udma(adev))
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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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* 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 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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ATA_BMDMA_SHT(DRV_NAME),
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.sg_tablesize = LIBATA_DUMB_MAX_PRD,
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};
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static struct ata_port_operations atiixp_port_ops = {
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.inherits = &ata_bmdma_port_ops,
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.qc_prep = ata_bmdma_dumb_qc_prep,
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.bmdma_start = atiixp_bmdma_start,
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.bmdma_stop = atiixp_bmdma_stop,
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.prereset = atiixp_prereset,
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.cable_detect = atiixp_cable_detect,
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.set_piomode = atiixp_set_piomode,
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.set_dmamode = atiixp_set_dmamode,
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};
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static int atiixp_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
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{
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static const struct ata_port_info info = {
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.flags = ATA_FLAG_SLAVE_POSS,
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.pio_mask = ATA_PIO4,
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.mwdma_mask = ATA_MWDMA12_ONLY,
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.udma_mask = ATA_UDMA5,
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.port_ops = &atiixp_port_ops
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};
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const struct ata_port_info *ppi[] = { &info, &info };
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/* SB600 doesn't have secondary port wired */
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if (pdev->device == PCI_DEVICE_ID_ATI_IXP600_IDE)
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ppi[1] = &ata_dummy_port_info;
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return ata_pci_bmdma_init_one(pdev, ppi, &atiixp_sht, NULL,
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ATA_HOST_PARALLEL_SCAN);
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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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{ PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP700_IDE), },
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{ PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_HUDSON2_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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#ifdef CONFIG_PM_SLEEP
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.resume = ata_pci_device_resume,
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.suspend = ata_pci_device_suspend,
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#endif
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};
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module_pci_driver(atiixp_pci_driver);
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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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