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/*

 *      Marvell PATA driver.

 *

 *      For the moment we drive the PATA port in legacy mode. That

 *      isn't making full use of the device functionality but it is

 *      easy to get working.

 *

 *      (c) 2006 Red Hat  <alan@redhat.com>

 */

#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 <linux/device.h>

#include <scsi/scsi_host.h>

#include <linux/libata.h>

#include <linux/ata.h>

#define DRV_NAME        "pata_marvell"

#define DRV_VERSION     "0.1.4"

/**

 *      marvell_pre_reset       -       check for 40/80 pin

 *      @link: link

 *      @deadline: deadline jiffies for the operation

 *

 *      Perform the PATA port setup we need.

 */

static int marvell_pre_reset(struct ata_link *link, unsigned long deadline)

{

        struct ata_port *ap = link->ap;

        struct pci_dev *pdev = to_pci_dev(ap->host->dev);

        u32 devices;

        void __iomem *barp;

        int i;

        /* Check if our port is enabled */

        barp = pci_iomap(pdev, 5, 0x10);

        if (barp == NULL)

                return -ENOMEM;

        printk("BAR5:");

        for(i = 0; i <= 0x0F; i++)

                printk("%02X:%02X ", i, ioread8(barp + i));

        printk("\n");

        devices = ioread32(barp + 0x0C);

        pci_iounmap(pdev, barp);

        if ((pdev->device == 0x6145) && (ap->port_no == 0) &&

            (!(devices & 0x10)))        /* PATA enable ? */

                return -ENOENT;

        return ata_std_prereset(link, deadline);

}

static int marvell_cable_detect(struct ata_port *ap)

{

        /* Cable type */

        switch(ap->port_no)

        {

        case 0:

                if (ioread8(ap->ioaddr.bmdma_addr + 1) & 1)

                        return ATA_CBL_PATA40;

                return ATA_CBL_PATA80;

        case 1: /* Legacy SATA port */

                return ATA_CBL_SATA;

        }

        BUG();

        return 0;        /* Our BUG macro needs the right markup */

}

/**

 *      marvell_error_handler - Setup and error handler

 *      @ap: Port to handle

 *

 *      LOCKING:

 *      None (inherited from caller).

 */

static void marvell_error_handler(struct ata_port *ap)

{

        return ata_bmdma_drive_eh(ap, marvell_pre_reset, ata_std_softreset,

                                  NULL, ata_std_postreset);

}

/* No PIO or DMA methods needed for this device */

static struct scsi_host_template marvell_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,

        /* Use standard CHS mapping rules */

        .bios_param             = ata_std_bios_param,

};

static const struct ata_port_operations marvell_ops = {

        /* Task file is PCI ATA format, use helpers */

        .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,

        .freeze                 = ata_bmdma_freeze,

        .thaw                   = ata_bmdma_thaw,

        .error_handler          = marvell_error_handler,

        .post_internal_cmd      = ata_bmdma_post_internal_cmd,

        .cable_detect           = marvell_cable_detect,

        /* BMDMA handling is PCI ATA format, use helpers */

        .bmdma_setup            = ata_bmdma_setup,

        .bmdma_start            = ata_bmdma_start,

        .bmdma_stop             = ata_bmdma_stop,

        .bmdma_status           = ata_bmdma_status,

        .qc_prep                = ata_qc_prep,

        .qc_issue               = ata_qc_issue_prot,

        .data_xfer              = ata_data_xfer,

        /* Timeout handling */

        .irq_handler            = ata_interrupt,

        .irq_clear              = ata_bmdma_irq_clear,

        .irq_on                 = ata_irq_on,

        /* Generic PATA PCI ATA helpers */

        .port_start             = ata_sff_port_start,

};

/**

 *      marvell_init_one - Register Marvell ATA PCI device with kernel services

 *      @pdev: PCI device to register

 *      @ent: Entry in marvell_pci_tbl matching with @pdev

 *

 *      Called from kernel PCI layer.

 *

 *      LOCKING:

 *      Inherited from PCI layer (may sleep).

 *

 *      RETURNS:

 *      Zero on success, or -ERRNO value.

 */

static int marvell_init_one (struct pci_dev *pdev, const struct pci_device_id *id)

{

        static const struct ata_port_info info = {

                .sht            = &marvell_sht,

                .flags          = ATA_FLAG_SLAVE_POSS,

                .pio_mask       = 0x1f,

                .mwdma_mask     = 0x07,

                .udma_mask      = ATA_UDMA5,

                .port_ops       = &marvell_ops,

        };

        static const struct ata_port_info info_sata = {

                .sht            = &marvell_sht,

                /* Slave possible as its magically mapped not real */

                .flags          = ATA_FLAG_SLAVE_POSS,

                .pio_mask       = 0x1f,

                .mwdma_mask     = 0x07,

                .udma_mask      = ATA_UDMA6,

                .port_ops       = &marvell_ops,

        };

        const struct ata_port_info *ppi[] = { &info, &info_sata };

        if (pdev->device == 0x6101)

                ppi[1] = &ata_dummy_port_info;

        return ata_pci_init_one(pdev, ppi);

}

static const struct pci_device_id marvell_pci_tbl[] = {

        { PCI_DEVICE(0x11AB, 0x6101), },

        { PCI_DEVICE(0x11AB, 0x6121), },

        { PCI_DEVICE(0x11AB, 0x6123), },

        { PCI_DEVICE(0x11AB, 0x6145), },

        { }     /* terminate list */

};

static struct pci_driver marvell_pci_driver = {

        .name                   = DRV_NAME,

        .id_table               = marvell_pci_tbl,

        .probe                  = marvell_init_one,

        .remove                 = ata_pci_remove_one,

#ifdef CONFIG_PM

        .suspend                = ata_pci_device_suspend,

        .resume                 = ata_pci_device_resume,

#endif

};

static int __init marvell_init(void)

{

        return pci_register_driver(&marvell_pci_driver);

}

static void __exit marvell_exit(void)

{

        pci_unregister_driver(&marvell_pci_driver);

}

module_init(marvell_init);

module_exit(marvell_exit);

MODULE_AUTHOR("Alan Cox");

MODULE_DESCRIPTION("SCSI low-level driver for Marvell ATA in legacy mode");

MODULE_LICENSE("GPL");

MODULE_DEVICE_TABLE(pci, marvell_pci_tbl);

MODULE_VERSION(DRV_VERSION);