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/*

 *  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 "0.2.13"

/*

 *      A generic parallel ATA driver using libata

 */

/**

 *      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;

        int dma_enabled = 0;

        struct ata_device *dev;

        /* Bits 5 and 6 indicate if DMA is active on master/slave */

        if (ap->ioaddr.bmdma_addr)

                dma_enabled = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);

        ata_link_for_each_dev(dev, link) {

                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 + dev->devno))) {

                                ata_id_to_dma_mode(dev, XFER_MW_DMA_0);

                                dev->flags &= ~ATA_DFLAG_PIO;

                        } else {

                                ata_dev_printk(dev, KERN_INFO, "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 = {

        .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,

        .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,

        .slave_destroy          = ata_scsi_slave_destroy,

        .bios_param             = ata_std_bios_param,

};

static struct ata_port_operations generic_port_ops = {

        .set_mode       = generic_set_mode,

        .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_data_xfer,

        .freeze         = ata_bmdma_freeze,

        .thaw           = ata_bmdma_thaw,

        .error_handler  = ata_bmdma_error_handler,

        .post_internal_cmd = ata_bmdma_post_internal_cmd,

        .cable_detect   = ata_cable_unknown,

        .qc_prep        = ata_qc_prep,

        .qc_issue       = ata_qc_issue_prot,

        .irq_handler    = ata_interrupt,

        .irq_clear      = ata_bmdma_irq_clear,

        .irq_on         = ata_irq_on,

        .port_start     = ata_sff_port_start,

};

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 const struct ata_port_info info = {

                .sht = &generic_sht,

                .flags = ATA_FLAG_SLAVE_POSS,

                .pio_mask = 0x1f,

                .mwdma_mask = 0x07,

                .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 == 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, ppi);

}

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,

#ifdef CONFIG_PM

        .suspend        = ata_pci_device_suspend,

        .resume         = ata_pci_device_resume,

#endif

};

static int __init ata_generic_init(void)

{

        return pci_register_driver(&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);