261 lines
6.4 KiB
C
261 lines
6.4 KiB
C
/*
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* pata_hpt3x3 - HPT3x3 driver
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* (c) Copyright 2005-2006 Red Hat
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*
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* Was pata_hpt34x but the naming was confusing as it supported the
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* 343 and 363 so it has been renamed.
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*
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* Based on:
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* linux/drivers/ide/pci/hpt34x.c Version 0.40 Sept 10, 2002
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* Copyright (C) 1998-2000 Andre Hedrick <andre@linux-ide.org>
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*
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* May be copied or modified under the terms of the GNU General Public
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* License
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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_hpt3x3"
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#define DRV_VERSION "0.5.3"
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/**
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* hpt3x3_set_piomode - PIO setup
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* @ap: ATA interface
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* @adev: device on the interface
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*
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* Set our PIO requirements. This is fairly simple on the HPT3x3 as
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* all we have to do is clear the MWDMA and UDMA bits then load the
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* mode number.
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*/
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static void hpt3x3_set_piomode(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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u32 r1, r2;
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int dn = 2 * ap->port_no + adev->devno;
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pci_read_config_dword(pdev, 0x44, &r1);
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pci_read_config_dword(pdev, 0x48, &r2);
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/* Load the PIO timing number */
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r1 &= ~(7 << (3 * dn));
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r1 |= (adev->pio_mode - XFER_PIO_0) << (3 * dn);
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r2 &= ~(0x11 << dn); /* Clear MWDMA and UDMA bits */
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pci_write_config_dword(pdev, 0x44, r1);
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pci_write_config_dword(pdev, 0x48, r2);
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}
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#if defined(CONFIG_PATA_HPT3X3_DMA)
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/**
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* hpt3x3_set_dmamode - DMA timing setup
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* @ap: ATA interface
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* @adev: Device being configured
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*
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* Set up the channel for MWDMA or UDMA modes. Much the same as with
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* PIO, load the mode number and then set MWDMA or UDMA flag.
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*
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* 0x44 : bit 0-2 master mode, 3-5 slave mode, etc
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* 0x48 : bit 4/0 DMA/UDMA bit 5/1 for slave etc
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*/
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static void hpt3x3_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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u32 r1, r2;
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int dn = 2 * ap->port_no + adev->devno;
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int mode_num = adev->dma_mode & 0x0F;
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pci_read_config_dword(pdev, 0x44, &r1);
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pci_read_config_dword(pdev, 0x48, &r2);
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/* Load the timing number */
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r1 &= ~(7 << (3 * dn));
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r1 |= (mode_num << (3 * dn));
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r2 &= ~(0x11 << dn); /* Clear MWDMA and UDMA bits */
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if (adev->dma_mode >= XFER_UDMA_0)
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r2 |= (0x10 << dn); /* Ultra mode */
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else
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r2 |= (0x01 << dn); /* MWDMA */
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pci_write_config_dword(pdev, 0x44, r1);
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pci_write_config_dword(pdev, 0x48, r2);
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}
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#endif /* CONFIG_PATA_HPT3X3_DMA */
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/**
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* hpt3x3_atapi_dma - ATAPI DMA check
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* @qc: Queued command
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*
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* Just say no - we don't do ATAPI DMA
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*/
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static int hpt3x3_atapi_dma(struct ata_queued_cmd *qc)
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{
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return 1;
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}
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static struct scsi_host_template hpt3x3_sht = {
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ATA_BMDMA_SHT(DRV_NAME),
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};
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static struct ata_port_operations hpt3x3_port_ops = {
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.inherits = &ata_bmdma_port_ops,
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.check_atapi_dma= hpt3x3_atapi_dma,
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.cable_detect = ata_cable_40wire,
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.set_piomode = hpt3x3_set_piomode,
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#if defined(CONFIG_PATA_HPT3X3_DMA)
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.set_dmamode = hpt3x3_set_dmamode,
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#endif
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};
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/**
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* hpt3x3_init_chipset - chip setup
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* @dev: PCI device
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*
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* Perform the setup required at boot and on resume.
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*/
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static void hpt3x3_init_chipset(struct pci_dev *dev)
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{
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u16 cmd;
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/* Initialize the board */
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pci_write_config_word(dev, 0x80, 0x00);
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/* Check if it is a 343 or a 363. 363 has COMMAND_MEMORY set */
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pci_read_config_word(dev, PCI_COMMAND, &cmd);
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if (cmd & PCI_COMMAND_MEMORY)
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pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0xF0);
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else
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pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0x20);
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}
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/**
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* hpt3x3_init_one - Initialise an HPT343/363
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* @pdev: PCI device
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* @id: Entry in match table
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*
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* Perform basic initialisation. We set the device up so we access all
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* ports via BAR4. This is neccessary to work around errata.
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*/
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static int hpt3x3_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
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{
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static int printed_version;
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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 = 0x1f,
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#if defined(CONFIG_PATA_HPT3X3_DMA)
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/* Further debug needed */
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.mwdma_mask = 0x07,
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.udma_mask = 0x07,
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#endif
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.port_ops = &hpt3x3_port_ops
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};
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/* Register offsets of taskfiles in BAR4 area */
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static const u8 offset_cmd[2] = { 0x20, 0x28 };
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static const u8 offset_ctl[2] = { 0x36, 0x3E };
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const struct ata_port_info *ppi[] = { &info, NULL };
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struct ata_host *host;
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int i, rc;
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void __iomem *base;
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hpt3x3_init_chipset(pdev);
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if (!printed_version++)
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dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
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host = ata_host_alloc_pinfo(&pdev->dev, ppi, 2);
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if (!host)
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return -ENOMEM;
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/* acquire resources and fill host */
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rc = pcim_enable_device(pdev);
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if (rc)
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return rc;
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/* Everything is relative to BAR4 if we set up this way */
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rc = pcim_iomap_regions(pdev, 1 << 4, DRV_NAME);
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if (rc == -EBUSY)
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pcim_pin_device(pdev);
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if (rc)
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return rc;
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host->iomap = pcim_iomap_table(pdev);
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rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
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if (rc)
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return rc;
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rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
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if (rc)
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return rc;
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base = host->iomap[4]; /* Bus mastering base */
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for (i = 0; i < host->n_ports; i++) {
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struct ata_port *ap = host->ports[i];
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struct ata_ioports *ioaddr = &ap->ioaddr;
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ioaddr->cmd_addr = base + offset_cmd[i];
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ioaddr->altstatus_addr =
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ioaddr->ctl_addr = base + offset_ctl[i];
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ioaddr->scr_addr = NULL;
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ata_sff_std_ports(ioaddr);
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ioaddr->bmdma_addr = base + 8 * i;
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ata_port_pbar_desc(ap, 4, -1, "ioport");
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ata_port_pbar_desc(ap, 4, offset_cmd[i], "cmd");
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}
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pci_set_master(pdev);
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return ata_host_activate(host, pdev->irq, ata_sff_interrupt,
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IRQF_SHARED, &hpt3x3_sht);
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}
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#ifdef CONFIG_PM
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static int hpt3x3_reinit_one(struct pci_dev *dev)
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{
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hpt3x3_init_chipset(dev);
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return ata_pci_device_resume(dev);
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}
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#endif
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static const struct pci_device_id hpt3x3[] = {
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{ PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT343), },
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{ },
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};
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static struct pci_driver hpt3x3_pci_driver = {
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.name = DRV_NAME,
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.id_table = hpt3x3,
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.probe = hpt3x3_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 = hpt3x3_reinit_one,
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#endif
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};
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static int __init hpt3x3_init(void)
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{
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return pci_register_driver(&hpt3x3_pci_driver);
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}
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static void __exit hpt3x3_exit(void)
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{
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pci_unregister_driver(&hpt3x3_pci_driver);
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}
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MODULE_AUTHOR("Alan Cox");
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MODULE_DESCRIPTION("low-level driver for the Highpoint HPT343/363");
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MODULE_LICENSE("GPL");
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MODULE_DEVICE_TABLE(pci, hpt3x3);
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MODULE_VERSION(DRV_VERSION);
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module_init(hpt3x3_init);
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module_exit(hpt3x3_exit);
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