/* * ata_generic.c - Generic PATA/SATA controller driver. * Copyright 2005 Red Hat Inc, 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/blkdev.h> #include <linux/delay.h> #include <scsi/scsi_host.h> #include <linux/libata.h> #define DRV_NAME "ata_generic" #define DRV_VERSION "0.2.15" /* * A generic parallel ATA driver using libata */ enum { ATA_GEN_CLASS_MATCH = (1 << 0), ATA_GEN_FORCE_DMA = (1 << 1), ATA_GEN_INTEL_IDER = (1 << 2), }; /** * generic_set_mode - mode setting * @link: link to set up * @unused: returned device on error * * 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 int generic_set_mode(struct ata_link *link, struct ata_device **unused) { struct ata_port *ap = link->ap; const struct pci_device_id *id = ap->host->private_data; int dma_enabled = 0; struct ata_device *dev; if (id->driver_data & ATA_GEN_FORCE_DMA) { dma_enabled = 0xff; } else if (ap->ioaddr.bmdma_addr) { /* Bits 5 and 6 indicate if DMA is active on master/slave */ dma_enabled = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); } ata_for_each_dev(dev, link, ENABLED) { /* 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 + dev->devno))) { unsigned int xfer_mask = ata_id_xfermask(dev->id); const char *name; if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA)) name = ata_mode_string(xfer_mask); else { /* SWDMA perhaps? */ name = "DMA"; xfer_mask |= ata_xfer_mode2mask(XFER_MW_DMA_0); } ata_dev_info(dev, "configured for %s\n", name); dev->xfer_mode = ata_xfer_mask2mode(xfer_mask); dev->xfer_shift = ata_xfer_mode2shift(dev->xfer_mode); dev->flags &= ~ATA_DFLAG_PIO; } else { ata_dev_info(dev, "configured for PIO\n"); dev->xfer_mode = XFER_PIO_0; dev->xfer_shift = ATA_SHIFT_PIO; dev->flags |= ATA_DFLAG_PIO; } } return 0; } static struct scsi_host_template generic_sht = { ATA_BMDMA_SHT(DRV_NAME), }; static struct ata_port_operations generic_port_ops = { .inherits = &ata_bmdma_port_ops, .cable_detect = ata_cable_unknown, .set_mode = generic_set_mode, }; static int all_generic_ide; /* Set to claim all devices */ /** * is_intel_ider - identify intel IDE-R devices * @dev: PCI device * * Distinguish Intel IDE-R controller devices from other Intel IDE * devices. IDE-R devices have no timing registers and are in * most respects virtual. They should be driven by the ata_generic * driver. * * IDE-R devices have PCI offset 0xF8.L as zero, later Intel ATA has * it non zero. All Intel ATA has 0x40 writable (timing), but it is * not writable on IDE-R devices (this is guaranteed). */ static int is_intel_ider(struct pci_dev *dev) { /* For Intel IDE the value at 0xF8 is only zero on IDE-R interfaces */ u32 r; u16 t; /* Check the manufacturing ID, it will be zero for IDE-R */ pci_read_config_dword(dev, 0xF8, &r); /* Not IDE-R: punt so that ata_(old)piix gets it */ if (r != 0) return 0; /* 0xF8 will also be zero on some early Intel IDE devices but they will have a sane timing register */ pci_read_config_word(dev, 0x40, &t); if (t != 0) return 0; /* Finally check if the timing register is writable so that we eliminate any early devices hot-docked in a docking station */ pci_write_config_word(dev, 0x40, 1); pci_read_config_word(dev, 0x40, &t); if (t) { pci_write_config_word(dev, 0x40, 0); return 0; } return 1; } /** * 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 const struct ata_port_info info = { .flags = ATA_FLAG_SLAVE_POSS, .pio_mask = ATA_PIO4, .mwdma_mask = ATA_MWDMA2, .udma_mask = ATA_UDMA5, .port_ops = &generic_port_ops }; const struct ata_port_info *ppi[] = { &info, NULL }; /* Don't use the generic entry unless instructed to do so */ if ((id->driver_data & ATA_GEN_CLASS_MATCH) && all_generic_ide == 0) return -ENODEV; if ((id->driver_data & ATA_GEN_INTEL_IDER) && !all_generic_ide) if (!is_intel_ider(dev)) 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_bmdma_clear_simplex(dev); if (dev->vendor == PCI_VENDOR_ID_ATI) { int rc = pcim_enable_device(dev); if (rc < 0) return rc; pcim_pin_device(dev); } return ata_pci_bmdma_init_one(dev, ppi, &generic_sht, (void *)id, 0); } 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_CENATEK,PCI_DEVICE_ID_CENATEK_IDE), .driver_data = ATA_GEN_FORCE_DMA }, #if !defined(CONFIG_PATA_TOSHIBA) && !defined(CONFIG_PATA_TOSHIBA_MODULE) { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_1), }, { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_2), }, { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_3), }, { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_5), }, #endif /* Intel, IDE class device */ { PCI_VENDOR_ID_INTEL, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_IDE << 8, 0xFFFFFF00UL, .driver_data = ATA_GEN_INTEL_IDER }, /* Must come last. If you add entries adjust this table appropriately */ { PCI_DEVICE_CLASS(PCI_CLASS_STORAGE_IDE << 8, 0xFFFFFF00UL), .driver_data = ATA_GEN_CLASS_MATCH }, { 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, #ifdef CONFIG_PM_SLEEP .suspend = ata_pci_device_suspend, .resume = ata_pci_device_resume, #endif }; module_pci_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_param(all_generic_ide, int, 0);