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/*

 *  sata_uli.c - ULi Electronics SATA

 *

 *

 *  This program is free software; you can redistribute it and/or modify

 *  it under the terms of the GNU General Public License as published by

 *  the Free Software Foundation; either version 2, or (at your option)

 *  any later version.

 *

 *  This program is distributed in the hope that it will be useful,

 *  but WITHOUT ANY WARRANTY; without even the implied warranty of

 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 *  GNU General Public License for more details.

 *

 *  You should have received a copy of the GNU General Public License

 *  along with this program; see the file COPYING.  If not, write to

 *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.

 *

 *

 *  libata documentation is available via 'make {ps|pdf}docs',

 *  as Documentation/DocBook/libata.*

 *

 *  Hardware documentation available under NDA.

 *

 */

#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/interrupt.h>

#include <linux/device.h>

#include <scsi/scsi_host.h>

#include <linux/libata.h>

#define DRV_NAME        "sata_uli"

#define DRV_VERSION     "1.3"

enum {

        uli_5289                = 0,

        uli_5287                = 1,

        uli_5281                = 2,

        uli_max_ports           = 4,

        /* PCI configuration registers */

        ULI5287_BASE            = 0x90, /* sata0 phy SCR registers */

        ULI5287_OFFS            = 0x10, /* offset from sata0->sata1 phy regs */

        ULI5281_BASE            = 0x60, /* sata0 phy SCR  registers */

        ULI5281_OFFS            = 0x60, /* offset from sata0->sata1 phy regs */

};

struct uli_priv {

        unsigned int            scr_cfg_addr[uli_max_ports];

};

static int uli_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);

static int uli_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val);

static int uli_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val);

static const struct pci_device_id uli_pci_tbl[] = {

        { PCI_VDEVICE(AL, 0x5289), uli_5289 },

        { PCI_VDEVICE(AL, 0x5287), uli_5287 },

        { PCI_VDEVICE(AL, 0x5281), uli_5281 },

        { }     /* terminate list */

};

static struct pci_driver uli_pci_driver = {

        .name                   = DRV_NAME,

        .id_table               = uli_pci_tbl,

        .probe                  = uli_init_one,

        .remove                 = ata_pci_remove_one,

};

static struct scsi_host_template uli_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 const struct ata_port_operations uli_ops = {

        .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,

        .qc_prep                = ata_qc_prep,

        .qc_issue               = ata_qc_issue_prot,

        .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,

        .irq_clear              = ata_bmdma_irq_clear,

        .irq_on                 = ata_irq_on,

        .scr_read               = uli_scr_read,

        .scr_write              = uli_scr_write,

        .port_start             = ata_port_start,

};

static const struct ata_port_info uli_port_info = {

        .flags          = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |

                          ATA_FLAG_IGN_SIMPLEX,

        .pio_mask       = 0x1f,         /* pio0-4 */

        .udma_mask      = ATA_UDMA6,

        .port_ops       = &uli_ops,

};

MODULE_AUTHOR("Peer Chen");

MODULE_DESCRIPTION("low-level driver for ULi Electronics SATA controller");

MODULE_LICENSE("GPL");

MODULE_DEVICE_TABLE(pci, uli_pci_tbl);

MODULE_VERSION(DRV_VERSION);

static unsigned int get_scr_cfg_addr(struct ata_port *ap, unsigned int sc_reg)

{

        struct uli_priv *hpriv = ap->host->private_data;

        return hpriv->scr_cfg_addr[ap->port_no] + (4 * sc_reg);

}

static u32 uli_scr_cfg_read(struct ata_port *ap, unsigned int sc_reg)

{

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

        unsigned int cfg_addr = get_scr_cfg_addr(ap, sc_reg);

        u32 val;

        pci_read_config_dword(pdev, cfg_addr, &val);

        return val;

}

static void uli_scr_cfg_write(struct ata_port *ap, unsigned int scr, u32 val)

{

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

        unsigned int cfg_addr = get_scr_cfg_addr(ap, scr);

        pci_write_config_dword(pdev, cfg_addr, val);

}

static int uli_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val)

{

        if (sc_reg > SCR_CONTROL)

                return -EINVAL;

        *val = uli_scr_cfg_read(ap, sc_reg);

        return 0;

}

static int uli_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val)

{

        if (sc_reg > SCR_CONTROL) //SCR_CONTROL=2, SCR_ERROR=1, SCR_STATUS=0

                return -EINVAL;

        uli_scr_cfg_write(ap, sc_reg, val);

        return 0;

}

static int uli_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)

{

        static int printed_version;

        const struct ata_port_info *ppi[] = { &uli_port_info, NULL };

        unsigned int board_idx = (unsigned int) ent->driver_data;

        struct ata_host *host;

        struct uli_priv *hpriv;

        void __iomem * const *iomap;

        struct ata_ioports *ioaddr;

        int n_ports, rc;

        if (!printed_version++)

                dev_printk(KERN_INFO, &pdev->dev, "version " DRV_VERSION "\n");

        rc = pcim_enable_device(pdev);

        if (rc)

                return rc;

        n_ports = 2;

        if (board_idx == uli_5287)

                n_ports = 4;

        /* allocate the host */

        host = ata_host_alloc_pinfo(&pdev->dev, ppi, n_ports);

        if (!host)

                return -ENOMEM;

        hpriv = devm_kzalloc(&pdev->dev, sizeof(*hpriv), GFP_KERNEL);

        if (!hpriv)

                return -ENOMEM;

        host->private_data = hpriv;

        /* the first two ports are standard SFF */

        rc = ata_pci_init_sff_host(host);

        if (rc)

                return rc;

        rc = ata_pci_init_bmdma(host);

        if (rc)

                return rc;

        iomap = host->iomap;

        switch (board_idx) {

        case uli_5287:

                /* If there are four, the last two live right after

                 * the standard SFF ports.

                 */

                hpriv->scr_cfg_addr[0] = ULI5287_BASE;

                hpriv->scr_cfg_addr[1] = ULI5287_BASE + ULI5287_OFFS;

                ioaddr = &host->ports[2]->ioaddr;

                ioaddr->cmd_addr = iomap[0] + 8;

                ioaddr->altstatus_addr =

                ioaddr->ctl_addr = (void __iomem *)

                        ((unsigned long)iomap[1] | ATA_PCI_CTL_OFS) + 4;

                ioaddr->bmdma_addr = iomap[4] + 16;

                hpriv->scr_cfg_addr[2] = ULI5287_BASE + ULI5287_OFFS*4;

                ata_std_ports(ioaddr);

                ata_port_desc(host->ports[2],

                        "cmd 0x%llx ctl 0x%llx bmdma 0x%llx",

                        (unsigned long long)pci_resource_start(pdev, 0) + 8,

                        ((unsigned long long)pci_resource_start(pdev, 1) | ATA_PCI_CTL_OFS) + 4,

                        (unsigned long long)pci_resource_start(pdev, 4) + 16);

                ioaddr = &host->ports[3]->ioaddr;

                ioaddr->cmd_addr = iomap[2] + 8;

                ioaddr->altstatus_addr =

                ioaddr->ctl_addr = (void __iomem *)

                        ((unsigned long)iomap[3] | ATA_PCI_CTL_OFS) + 4;

                ioaddr->bmdma_addr = iomap[4] + 24;

                hpriv->scr_cfg_addr[3] = ULI5287_BASE + ULI5287_OFFS*5;

                ata_std_ports(ioaddr);

                ata_port_desc(host->ports[2],

                        "cmd 0x%llx ctl 0x%llx bmdma 0x%llx",

                        (unsigned long long)pci_resource_start(pdev, 2) + 9,

                        ((unsigned long long)pci_resource_start(pdev, 3) | ATA_PCI_CTL_OFS) + 4,

                        (unsigned long long)pci_resource_start(pdev, 4) + 24);

                break;

        case uli_5289:

                hpriv->scr_cfg_addr[0] = ULI5287_BASE;

                hpriv->scr_cfg_addr[1] = ULI5287_BASE + ULI5287_OFFS;

                break;

        case uli_5281:

                hpriv->scr_cfg_addr[0] = ULI5281_BASE;

                hpriv->scr_cfg_addr[1] = ULI5281_BASE + ULI5281_OFFS;

                break;

        default:

                BUG();

                break;

        }

        pci_set_master(pdev);

        pci_intx(pdev, 1);

        return ata_host_activate(host, pdev->irq, ata_interrupt, IRQF_SHARED,

                                 &uli_sht);

}

static int __init uli_init(void)

{

        return pci_register_driver(&uli_pci_driver);

}

static void __exit uli_exit(void)

{

        pci_unregister_driver(&uli_pci_driver);

}

module_init(uli_init);

module_exit(uli_exit);