/* * ata_generic.c - Generic PATA/SATA controller driver. * Copyright 2005 Red Hat Inc <alan@redhat.com>, all rights reserved. * * Elements from ide/pci/generic.c * Copyright (C) 2001-2002 Andre Hedrick <andre@linux-ide.org> * Portions (C) Copyright 2002 Red Hat Inc <alan@redhat.com> * * May be copied or modified under the terms of the GNU General Public License * * Driver for PCI IDE interfaces implementing the standard bus mastering * interface functionality. This assumes the BIOS did the drive set up and * tuning for us. By default we do not grab all IDE class devices as they * may have other drivers or need fixups to avoid problems. Instead we keep * a default list of stuff without documentation/driver that appears to * work. */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/pci.h> #include <linux/init.h> #include <linux/blkdev.h> #include <linux/delay.h> #include <scsi/scsi_host.h> #include <linux/libata.h> #define DRV_NAME "ata_generic" #define DRV_VERSION "0.2.6" /* * A generic parallel ATA driver using libata */ /** * generic_pre_reset - probe begin * @ap: ATA port * * Set up cable type and use generic probe init */ static int generic_pre_reset(struct ata_port *ap) { ap->cbl = ATA_CBL_PATA80; return ata_std_prereset(ap); } /** * generic_error_handler - Probe specified port on PATA host controller * @ap: Port to probe * @classes: * * LOCKING: * None (inherited from caller). */ static void generic_error_handler(struct ata_port *ap) { ata_bmdma_drive_eh(ap, generic_pre_reset, ata_std_softreset, NULL, ata_std_postreset); } /** * generic_set_mode - mode setting * @ap: interface to set up * * Use a non standard set_mode function. We don't want to be tuned. * The BIOS configured everything. Our job is not to fiddle. We * read the dma enabled bits from the PCI configuration of the device * and respect them. */ static void generic_set_mode(struct ata_port *ap) { int dma_enabled = 0; int i; /* Bits 5 and 6 indicate if DMA is active on master/slave */ if (ap->ioaddr.bmdma_addr) dma_enabled = inb(ap->ioaddr.bmdma_addr + ATA_DMA_CMD); for (i = 0; i < ATA_MAX_DEVICES; i++) { struct ata_device *dev = &ap->device[i]; if (ata_dev_enabled(dev)) { /* We don't really care */ dev->pio_mode = XFER_PIO_0; dev->dma_mode = XFER_MW_DMA_0; /* We do need the right mode information for DMA or PIO and this comes from the current configuration flags */ if (dma_enabled & (1 << (5 + i))) { dev->xfer_mode = XFER_MW_DMA_0; dev->xfer_shift = ATA_SHIFT_MWDMA; dev->flags &= ~ATA_DFLAG_PIO; } else { dev->xfer_mode = XFER_PIO_0; dev->xfer_shift = ATA_SHIFT_PIO; dev->flags |= ATA_DFLAG_PIO; } } } } static struct scsi_host_template generic_sht = { .module = THIS_MODULE, .name = DRV_NAME, .ioctl = ata_scsi_ioctl, .queuecommand = ata_scsi_queuecmd, .can_queue = ATA_DEF_QUEUE, .this_id = ATA_SHT_THIS_ID, .sg_tablesize = LIBATA_MAX_PRD, .max_sectors = ATA_MAX_SECTORS, .cmd_per_lun = ATA_SHT_CMD_PER_LUN, .emulated = ATA_SHT_EMULATED, .use_clustering = ATA_SHT_USE_CLUSTERING, .proc_name = DRV_NAME, .dma_boundary = ATA_DMA_BOUNDARY, .slave_configure = ata_scsi_slave_config, .bios_param = ata_std_bios_param, }; static struct ata_port_operations generic_port_ops = { .set_mode = generic_set_mode, .port_disable = ata_port_disable, .tf_load = ata_tf_load, .tf_read = ata_tf_read, .check_status = ata_check_status, .exec_command = ata_exec_command, .dev_select = ata_std_dev_select, .bmdma_setup = ata_bmdma_setup, .bmdma_start = ata_bmdma_start, .bmdma_stop = ata_bmdma_stop, .bmdma_status = ata_bmdma_status, .data_xfer = ata_pio_data_xfer, .freeze = ata_bmdma_freeze, .thaw = ata_bmdma_thaw, .error_handler = generic_error_handler, .post_internal_cmd = ata_bmdma_post_internal_cmd, .qc_prep = ata_qc_prep, .qc_issue = ata_qc_issue_prot, .irq_handler = ata_interrupt, .irq_clear = ata_bmdma_irq_clear, .port_start = ata_port_start, .port_stop = ata_port_stop, .host_stop = ata_host_stop }; static int all_generic_ide; /* Set to claim all devices */ /** * ata_generic_init - attach generic IDE * @dev: PCI device found * @id: match entry * * Called each time a matching IDE interface is found. We check if the * interface is one we wish to claim and if so we perform any chip * specific hacks then let the ATA layer do the heavy lifting. */ static int ata_generic_init_one(struct pci_dev *dev, const struct pci_device_id *id) { u16 command; static struct ata_port_info info = { .sht = &generic_sht, .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST, .pio_mask = 0x1f, .mwdma_mask = 0x07, .udma_mask = 0x3f, .port_ops = &generic_port_ops }; static struct ata_port_info *port_info[2] = { &info, &info }; /* Don't use the generic entry unless instructed to do so */ if (id->driver_data == 1 && all_generic_ide == 0) return -ENODEV; /* Devices that need care */ if (dev->vendor == PCI_VENDOR_ID_UMC && dev->device == PCI_DEVICE_ID_UMC_UM8886A && (!(PCI_FUNC(dev->devfn) & 1))) return -ENODEV; if (dev->vendor == PCI_VENDOR_ID_OPTI && dev->device == PCI_DEVICE_ID_OPTI_82C558 && (!(PCI_FUNC(dev->devfn) & 1))) return -ENODEV; /* Don't re-enable devices in generic mode or we will break some motherboards with disabled and unused IDE controllers */ pci_read_config_word(dev, PCI_COMMAND, &command); if (!(command & PCI_COMMAND_IO)) return -ENODEV; if (dev->vendor == PCI_VENDOR_ID_AL) ata_pci_clear_simplex(dev); return ata_pci_init_one(dev, port_info, 2); } static struct pci_device_id ata_generic[] = { { PCI_DEVICE(PCI_VENDOR_ID_PCTECH, PCI_DEVICE_ID_PCTECH_SAMURAI_IDE), }, { PCI_DEVICE(PCI_VENDOR_ID_HOLTEK, PCI_DEVICE_ID_HOLTEK_6565), }, { PCI_DEVICE(PCI_VENDOR_ID_UMC, PCI_DEVICE_ID_UMC_UM8673F), }, { PCI_DEVICE(PCI_VENDOR_ID_UMC, PCI_DEVICE_ID_UMC_UM8886A), }, { PCI_DEVICE(PCI_VENDOR_ID_UMC, PCI_DEVICE_ID_UMC_UM8886BF), }, { PCI_DEVICE(PCI_VENDOR_ID_HINT, PCI_DEVICE_ID_HINT_VXPROII_IDE), }, { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C561), }, { PCI_DEVICE(PCI_VENDOR_ID_OPTI, PCI_DEVICE_ID_OPTI_82C558), }, { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO), }, { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_1), }, { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_2), }, /* Must come last. If you add entries adjust this table appropriately */ { PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_IDE << 8, 0xFFFFFF00UL, 1}, { 0, }, }; static struct pci_driver ata_generic_pci_driver = { .name = DRV_NAME, .id_table = ata_generic, .probe = ata_generic_init_one, .remove = ata_pci_remove_one }; static int __init ata_generic_init(void) { return pci_module_init(&ata_generic_pci_driver); } static void __exit ata_generic_exit(void) { pci_unregister_driver(&ata_generic_pci_driver); } MODULE_AUTHOR("Alan Cox"); MODULE_DESCRIPTION("low-level driver for generic ATA"); MODULE_LICENSE("GPL"); MODULE_DEVICE_TABLE(pci, ata_generic); MODULE_VERSION(DRV_VERSION); module_init(ata_generic_init); module_exit(ata_generic_exit); module_param(all_generic_ide, int, 0);