254 lines
7.2 KiB
C
254 lines
7.2 KiB
C
/*
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* ata_generic.c - Generic PATA/SATA controller driver.
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* Copyright 2005 Red Hat Inc <alan@redhat.com>, all rights reserved.
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*
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* Elements from ide/pci/generic.c
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* Copyright (C) 2001-2002 Andre Hedrick <andre@linux-ide.org>
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* Portions (C) Copyright 2002 Red Hat Inc <alan@redhat.com>
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*
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* May be copied or modified under the terms of the GNU General Public License
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*
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* Driver for PCI IDE interfaces implementing the standard bus mastering
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* interface functionality. This assumes the BIOS did the drive set up and
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* tuning for us. By default we do not grab all IDE class devices as they
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* may have other drivers or need fixups to avoid problems. Instead we keep
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* a default list of stuff without documentation/driver that appears to
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* work.
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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 "ata_generic"
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#define DRV_VERSION "0.2.6"
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/*
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* A generic parallel ATA driver using libata
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*/
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/**
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* generic_pre_reset - probe begin
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* @ap: ATA port
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*
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* Set up cable type and use generic probe init
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*/
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static int generic_pre_reset(struct ata_port *ap)
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{
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ap->cbl = ATA_CBL_PATA80;
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return ata_std_prereset(ap);
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}
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/**
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* generic_error_handler - Probe specified port on PATA host controller
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* @ap: Port to probe
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* @classes:
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*
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* LOCKING:
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* None (inherited from caller).
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*/
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static void generic_error_handler(struct ata_port *ap)
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{
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ata_bmdma_drive_eh(ap, generic_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
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}
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/**
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* generic_set_mode - mode setting
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* @ap: interface to set up
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*
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* Use a non standard set_mode function. We don't want to be tuned.
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* The BIOS configured everything. Our job is not to fiddle. We
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* read the dma enabled bits from the PCI configuration of the device
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* and respect them.
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*/
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static void generic_set_mode(struct ata_port *ap)
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{
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int dma_enabled = 0;
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int i;
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/* Bits 5 and 6 indicate if DMA is active on master/slave */
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if (ap->ioaddr.bmdma_addr)
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dma_enabled = inb(ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
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for (i = 0; i < ATA_MAX_DEVICES; i++) {
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struct ata_device *dev = &ap->device[i];
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if (ata_dev_enabled(dev)) {
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/* We don't really care */
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dev->pio_mode = XFER_PIO_0;
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dev->dma_mode = XFER_MW_DMA_0;
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/* We do need the right mode information for DMA or PIO
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and this comes from the current configuration flags */
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if (dma_enabled & (1 << (5 + i))) {
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dev->xfer_mode = XFER_MW_DMA_0;
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dev->xfer_shift = ATA_SHIFT_MWDMA;
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dev->flags &= ~ATA_DFLAG_PIO;
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} else {
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dev->xfer_mode = XFER_PIO_0;
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dev->xfer_shift = ATA_SHIFT_PIO;
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dev->flags |= ATA_DFLAG_PIO;
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}
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}
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}
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}
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static struct scsi_host_template generic_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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.max_sectors = ATA_MAX_SECTORS,
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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 generic_port_ops = {
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.set_mode = generic_set_mode,
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.port_disable = ata_port_disable,
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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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.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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.data_xfer = ata_pio_data_xfer,
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.freeze = ata_bmdma_freeze,
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.thaw = ata_bmdma_thaw,
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.error_handler = generic_error_handler,
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.post_internal_cmd = ata_bmdma_post_internal_cmd,
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.qc_prep = ata_qc_prep,
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.qc_issue = ata_qc_issue_prot,
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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 all_generic_ide; /* Set to claim all devices */
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/**
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* ata_generic_init - attach generic IDE
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* @dev: PCI device found
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* @id: match entry
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*
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* Called each time a matching IDE interface is found. We check if the
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* interface is one we wish to claim and if so we perform any chip
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* specific hacks then let the ATA layer do the heavy lifting.
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*/
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static int ata_generic_init_one(struct pci_dev *dev, const struct pci_device_id *id)
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{
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u16 command;
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static struct ata_port_info info = {
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.sht = &generic_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 = 0x07,
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.udma_mask = 0x3f,
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.port_ops = &generic_port_ops
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};
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static struct ata_port_info *port_info[2] = { &info, &info };
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/* Don't use the generic entry unless instructed to do so */
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if (id->driver_data == 1 && all_generic_ide == 0)
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return -ENODEV;
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/* Devices that need care */
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if (dev->vendor == PCI_VENDOR_ID_UMC &&
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dev->device == PCI_DEVICE_ID_UMC_UM8886A &&
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(!(PCI_FUNC(dev->devfn) & 1)))
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return -ENODEV;
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if (dev->vendor == PCI_VENDOR_ID_OPTI &&
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dev->device == PCI_DEVICE_ID_OPTI_82C558 &&
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(!(PCI_FUNC(dev->devfn) & 1)))
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return -ENODEV;
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/* Don't re-enable devices in generic mode or we will break some
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motherboards with disabled and unused IDE controllers */
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pci_read_config_word(dev, PCI_COMMAND, &command);
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if (!(command & PCI_COMMAND_IO))
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return -ENODEV;
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if (dev->vendor == PCI_VENDOR_ID_AL)
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ata_pci_clear_simplex(dev);
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return ata_pci_init_one(dev, port_info, 2);
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}
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static struct pci_device_id ata_generic[] = {
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{ PCI_DEVICE(PCI_VENDOR_ID_PCTECH, PCI_DEVICE_ID_PCTECH_SAMURAI_IDE), },
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{ PCI_DEVICE(PCI_VENDOR_ID_HOLTEK, PCI_DEVICE_ID_HOLTEK_6565), },
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{ PCI_DEVICE(PCI_VENDOR_ID_UMC, PCI_DEVICE_ID_UMC_UM8673F), },
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{ PCI_DEVICE(PCI_VENDOR_ID_UMC, PCI_DEVICE_ID_UMC_UM8886A), },
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{ PCI_DEVICE(PCI_VENDOR_ID_UMC, PCI_DEVICE_ID_UMC_UM8886BF), },
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{ PCI_DEVICE(PCI_VENDOR_ID_HINT, PCI_DEVICE_ID_HINT_VXPROII_IDE), },
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{ PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C561), },
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{ PCI_DEVICE(PCI_VENDOR_ID_OPTI, PCI_DEVICE_ID_OPTI_82C558), },
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{ PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO), },
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{ PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_1), },
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{ PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_2), },
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/* Must come last. If you add entries adjust this table appropriately */
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{ PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_IDE << 8, 0xFFFFFF00UL, 1},
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{ 0, },
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};
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static struct pci_driver ata_generic_pci_driver = {
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.name = DRV_NAME,
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.id_table = ata_generic,
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.probe = ata_generic_init_one,
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.remove = ata_pci_remove_one
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};
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static int __init ata_generic_init(void)
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{
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return pci_module_init(&ata_generic_pci_driver);
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}
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static void __exit ata_generic_exit(void)
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{
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pci_unregister_driver(&ata_generic_pci_driver);
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}
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MODULE_AUTHOR("Alan Cox");
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MODULE_DESCRIPTION("low-level driver for generic ATA");
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MODULE_LICENSE("GPL");
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MODULE_DEVICE_TABLE(pci, ata_generic);
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MODULE_VERSION(DRV_VERSION);
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module_init(ata_generic_init);
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module_exit(ata_generic_exit);
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module_param(all_generic_ide, int, 0);
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