libata: implement and use SHT initializers

[mirror_ubuntu-bionic-kernel.git] / drivers / ata / sata_via.c

/*
 *  sata_via.c - VIA Serial ATA controllers
 *
 *  Maintained by:  Jeff Garzik <jgarzik@pobox.com>
 *                 Please ALWAYS copy linux-ide@vger.kernel.org
 *                 on emails.
 *
 *  Copyright 2003-2004 Red Hat, Inc.  All rights reserved.
 *  Copyright 2003-2004 Jeff Garzik
 *
 *
 *  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/device.h>
#include <scsi/scsi_host.h>
#include <linux/libata.h>

#define DRV_NAME        "sata_via"
#define DRV_VERSION     "2.3"

enum board_ids_enum {
        vt6420,
        vt6421,
};

enum {
        SATA_CHAN_ENAB          = 0x40, /* SATA channel enable */
        SATA_INT_GATE           = 0x41, /* SATA interrupt gating */
        SATA_NATIVE_MODE        = 0x42, /* Native mode enable */
        PATA_UDMA_TIMING        = 0xB3, /* PATA timing for DMA/ cable detect */
        PATA_PIO_TIMING         = 0xAB, /* PATA timing register */

        PORT0                   = (1 << 1),
        PORT1                   = (1 << 0),
        ALL_PORTS               = PORT0 | PORT1,

        NATIVE_MODE_ALL         = (1 << 7) | (1 << 6) | (1 << 5) | (1 << 4),

        SATA_EXT_PHY            = (1 << 6), /* 0==use PATA, 1==ext phy */
};

static int svia_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
static int svia_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val);
static int svia_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val);
static void svia_noop_freeze(struct ata_port *ap);
static void vt6420_error_handler(struct ata_port *ap);
static int vt6421_pata_cable_detect(struct ata_port *ap);
static void vt6421_set_pio_mode(struct ata_port *ap, struct ata_device *adev);
static void vt6421_set_dma_mode(struct ata_port *ap, struct ata_device *adev);

static const struct pci_device_id svia_pci_tbl[] = {
        { PCI_VDEVICE(VIA, 0x5337), vt6420 },
        { PCI_VDEVICE(VIA, 0x0591), vt6420 },
        { PCI_VDEVICE(VIA, 0x3149), vt6420 },
        { PCI_VDEVICE(VIA, 0x3249), vt6421 },
        { PCI_VDEVICE(VIA, 0x5287), vt6420 },
        { PCI_VDEVICE(VIA, 0x5372), vt6420 },
        { PCI_VDEVICE(VIA, 0x7372), vt6420 },

        { }     /* terminate list */
};

static struct pci_driver svia_pci_driver = {
        .name                   = DRV_NAME,
        .id_table               = svia_pci_tbl,
        .probe                  = svia_init_one,
#ifdef CONFIG_PM
        .suspend                = ata_pci_device_suspend,
        .resume                 = ata_pci_device_resume,
#endif
        .remove                 = ata_pci_remove_one,
};

static struct scsi_host_template svia_sht = {
        ATA_BMDMA_SHT(DRV_NAME),
};

static const struct ata_port_operations vt6420_sata_ops = {
        .mode_filter            = ata_pci_default_filter,

        .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                 = svia_noop_freeze,
        .thaw                   = ata_bmdma_thaw,
        .error_handler          = vt6420_error_handler,
        .post_internal_cmd      = ata_bmdma_post_internal_cmd,

        .irq_clear              = ata_bmdma_irq_clear,
        .irq_on                 = ata_irq_on,

        .port_start             = ata_sff_port_start,
};

static const struct ata_port_operations vt6421_pata_ops = {
        .set_piomode            = vt6421_set_pio_mode,
        .set_dmamode            = vt6421_set_dma_mode,
        .mode_filter            = ata_pci_default_filter,

        .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,
        .cable_detect           = vt6421_pata_cable_detect,

        .irq_clear              = ata_bmdma_irq_clear,
        .irq_on                 = ata_irq_on,

        .port_start             = ata_sff_port_start,
};

static const struct ata_port_operations vt6421_sata_ops = {
        .mode_filter            = ata_pci_default_filter,

        .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               = svia_scr_read,
        .scr_write              = svia_scr_write,

        .port_start             = ata_sff_port_start,
};

static const struct ata_port_info vt6420_port_info = {
        .flags          = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY,
        .pio_mask       = 0x1f,
        .mwdma_mask     = 0x07,
        .udma_mask      = ATA_UDMA6,
        .port_ops       = &vt6420_sata_ops,
};

static struct ata_port_info vt6421_sport_info = {
        .flags          = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY,
        .pio_mask       = 0x1f,
        .mwdma_mask     = 0x07,
        .udma_mask      = ATA_UDMA6,
        .port_ops       = &vt6421_sata_ops,
};

static struct ata_port_info vt6421_pport_info = {
        .flags          = ATA_FLAG_SLAVE_POSS | ATA_FLAG_NO_LEGACY,
        .pio_mask       = 0x1f,
        .mwdma_mask     = 0,
        .udma_mask      = ATA_UDMA6,
        .port_ops       = &vt6421_pata_ops,
};

MODULE_AUTHOR("Jeff Garzik");
MODULE_DESCRIPTION("SCSI low-level driver for VIA SATA controllers");
MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(pci, svia_pci_tbl);
MODULE_VERSION(DRV_VERSION);

static int svia_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val)
{
        if (sc_reg > SCR_CONTROL)
                return -EINVAL;
        *val = ioread32(ap->ioaddr.scr_addr + (4 * sc_reg));
        return 0;
}

static int svia_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val)
{
        if (sc_reg > SCR_CONTROL)
                return -EINVAL;
        iowrite32(val, ap->ioaddr.scr_addr + (4 * sc_reg));
        return 0;
}

static void svia_noop_freeze(struct ata_port *ap)
{
        /* Some VIA controllers choke if ATA_NIEN is manipulated in
         * certain way.  Leave it alone and just clear pending IRQ.
         */
        ata_chk_status(ap);
        ata_bmdma_irq_clear(ap);
}

/**
 *      vt6420_prereset - prereset for vt6420
 *      @link: target ATA link
 *      @deadline: deadline jiffies for the operation
 *
 *      SCR registers on vt6420 are pieces of shit and may hang the
 *      whole machine completely if accessed with the wrong timing.
 *      To avoid such catastrophe, vt6420 doesn't provide generic SCR
 *      access operations, but uses SStatus and SControl only during
 *      boot probing in controlled way.
 *
 *      As the old (pre EH update) probing code is proven to work, we
 *      strictly follow the access pattern.
 *
 *      LOCKING:
 *      Kernel thread context (may sleep)
 *
 *      RETURNS:
 *      0 on success, -errno otherwise.
 */
static int vt6420_prereset(struct ata_link *link, unsigned long deadline)
{
        struct ata_port *ap = link->ap;
        struct ata_eh_context *ehc = &ap->link.eh_context;
        unsigned long timeout = jiffies + (HZ * 5);
        u32 sstatus, scontrol;
        int online;

        /* don't do any SCR stuff if we're not loading */
        if (!(ap->pflags & ATA_PFLAG_LOADING))
                goto skip_scr;

        /* Resume phy.  This is the old SATA resume sequence */
        svia_scr_write(ap, SCR_CONTROL, 0x300);
        svia_scr_read(ap, SCR_CONTROL, &scontrol); /* flush */

        /* wait for phy to become ready, if necessary */
        do {
                msleep(200);
                svia_scr_read(ap, SCR_STATUS, &sstatus);
                if ((sstatus & 0xf) != 1)
                        break;
        } while (time_before(jiffies, timeout));

        /* open code sata_print_link_status() */
        svia_scr_read(ap, SCR_STATUS, &sstatus);
        svia_scr_read(ap, SCR_CONTROL, &scontrol);

        online = (sstatus & 0xf) == 0x3;

        ata_port_printk(ap, KERN_INFO,
                        "SATA link %s 1.5 Gbps (SStatus %X SControl %X)\n",
                        online ? "up" : "down", sstatus, scontrol);

        /* SStatus is read one more time */
        svia_scr_read(ap, SCR_STATUS, &sstatus);

        if (!online) {
                /* tell EH to bail */
                ehc->i.action &= ~ATA_EH_RESET;
                return 0;
        }

 skip_scr:
        /* wait for !BSY */
        ata_wait_ready(ap, deadline);

        return 0;
}

static void vt6420_error_handler(struct ata_port *ap)
{
        ata_bmdma_drive_eh(ap, vt6420_prereset, ata_std_softreset, NULL,
                           ata_std_postreset);
}

static int vt6421_pata_cable_detect(struct ata_port *ap)
{
        struct pci_dev *pdev = to_pci_dev(ap->host->dev);
        u8 tmp;

        pci_read_config_byte(pdev, PATA_UDMA_TIMING, &tmp);
        if (tmp & 0x10)
                return ATA_CBL_PATA40;
        return ATA_CBL_PATA80;
}

static void vt6421_set_pio_mode(struct ata_port *ap, struct ata_device *adev)
{
        struct pci_dev *pdev = to_pci_dev(ap->host->dev);
        static const u8 pio_bits[] = { 0xA8, 0x65, 0x65, 0x31, 0x20 };
        pci_write_config_byte(pdev, PATA_PIO_TIMING, pio_bits[adev->pio_mode - XFER_PIO_0]);
}

static void vt6421_set_dma_mode(struct ata_port *ap, struct ata_device *adev)
{
        struct pci_dev *pdev = to_pci_dev(ap->host->dev);
        static const u8 udma_bits[] = { 0xEE, 0xE8, 0xE6, 0xE4, 0xE2, 0xE1, 0xE0, 0xE0 };
        pci_write_config_byte(pdev, PATA_UDMA_TIMING, udma_bits[adev->dma_mode - XFER_UDMA_0]);
}

static const unsigned int svia_bar_sizes[] = {
        8, 4, 8, 4, 16, 256
};

static const unsigned int vt6421_bar_sizes[] = {
        16, 16, 16, 16, 32, 128
};

static void __iomem *svia_scr_addr(void __iomem *addr, unsigned int port)
{
        return addr + (port * 128);
}

static void __iomem *vt6421_scr_addr(void __iomem *addr, unsigned int port)
{
        return addr + (port * 64);
}

static void vt6421_init_addrs(struct ata_port *ap)
{
        void __iomem * const * iomap = ap->host->iomap;
        void __iomem *reg_addr = iomap[ap->port_no];
        void __iomem *bmdma_addr = iomap[4] + (ap->port_no * 8);
        struct ata_ioports *ioaddr = &ap->ioaddr;

        ioaddr->cmd_addr = reg_addr;
        ioaddr->altstatus_addr =
        ioaddr->ctl_addr = (void __iomem *)
                ((unsigned long)(reg_addr + 8) | ATA_PCI_CTL_OFS);
        ioaddr->bmdma_addr = bmdma_addr;
        ioaddr->scr_addr = vt6421_scr_addr(iomap[5], ap->port_no);

        ata_std_ports(ioaddr);

        ata_port_pbar_desc(ap, ap->port_no, -1, "port");
        ata_port_pbar_desc(ap, 4, ap->port_no * 8, "bmdma");
}

static int vt6420_prepare_host(struct pci_dev *pdev, struct ata_host **r_host)
{
        const struct ata_port_info *ppi[] = { &vt6420_port_info, NULL };
        struct ata_host *host;
        int rc;

        rc = ata_pci_prepare_sff_host(pdev, ppi, &host);
        if (rc)
                return rc;
        *r_host = host;

        rc = pcim_iomap_regions(pdev, 1 << 5, DRV_NAME);
        if (rc) {
                dev_printk(KERN_ERR, &pdev->dev, "failed to iomap PCI BAR 5\n");
                return rc;
        }

        host->ports[0]->ioaddr.scr_addr = svia_scr_addr(host->iomap[5], 0);
        host->ports[1]->ioaddr.scr_addr = svia_scr_addr(host->iomap[5], 1);

        return 0;
}

static int vt6421_prepare_host(struct pci_dev *pdev, struct ata_host **r_host)
{
        const struct ata_port_info *ppi[] =
                { &vt6421_sport_info, &vt6421_sport_info, &vt6421_pport_info };
        struct ata_host *host;
        int i, rc;

        *r_host = host = ata_host_alloc_pinfo(&pdev->dev, ppi, ARRAY_SIZE(ppi));
        if (!host) {
                dev_printk(KERN_ERR, &pdev->dev, "failed to allocate host\n");
                return -ENOMEM;
        }

        rc = pcim_iomap_regions(pdev, 0x3f, DRV_NAME);
        if (rc) {
                dev_printk(KERN_ERR, &pdev->dev, "failed to request/iomap "
                           "PCI BARs (errno=%d)\n", rc);
                return rc;
        }
        host->iomap = pcim_iomap_table(pdev);

        for (i = 0; i < host->n_ports; i++)
                vt6421_init_addrs(host->ports[i]);

        rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
        if (rc)
                return rc;
        rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
        if (rc)
                return rc;

        return 0;
}

static void svia_configure(struct pci_dev *pdev)
{
        u8 tmp8;

        pci_read_config_byte(pdev, PCI_INTERRUPT_LINE, &tmp8);
        dev_printk(KERN_INFO, &pdev->dev, "routed to hard irq line %d\n",
               (int) (tmp8 & 0xf0) == 0xf0 ? 0 : tmp8 & 0x0f);

        /* make sure SATA channels are enabled */
        pci_read_config_byte(pdev, SATA_CHAN_ENAB, &tmp8);
        if ((tmp8 & ALL_PORTS) != ALL_PORTS) {
                dev_printk(KERN_DEBUG, &pdev->dev,
                           "enabling SATA channels (0x%x)\n",
                           (int) tmp8);
                tmp8 |= ALL_PORTS;
                pci_write_config_byte(pdev, SATA_CHAN_ENAB, tmp8);
        }

        /* make sure interrupts for each channel sent to us */
        pci_read_config_byte(pdev, SATA_INT_GATE, &tmp8);
        if ((tmp8 & ALL_PORTS) != ALL_PORTS) {
                dev_printk(KERN_DEBUG, &pdev->dev,
                           "enabling SATA channel interrupts (0x%x)\n",
                           (int) tmp8);
                tmp8 |= ALL_PORTS;
                pci_write_config_byte(pdev, SATA_INT_GATE, tmp8);
        }

        /* make sure native mode is enabled */
        pci_read_config_byte(pdev, SATA_NATIVE_MODE, &tmp8);
        if ((tmp8 & NATIVE_MODE_ALL) != NATIVE_MODE_ALL) {
                dev_printk(KERN_DEBUG, &pdev->dev,
                           "enabling SATA channel native mode (0x%x)\n",
                           (int) tmp8);
                tmp8 |= NATIVE_MODE_ALL;
                pci_write_config_byte(pdev, SATA_NATIVE_MODE, tmp8);
        }
}

static int svia_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
{
        static int printed_version;
        unsigned int i;
        int rc;
        struct ata_host *host;
        int board_id = (int) ent->driver_data;
        const unsigned *bar_sizes;

        if (!printed_version++)
                dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");

        rc = pcim_enable_device(pdev);
        if (rc)
                return rc;

        if (board_id == vt6420)
                bar_sizes = &svia_bar_sizes[0];
        else
                bar_sizes = &vt6421_bar_sizes[0];

        for (i = 0; i < ARRAY_SIZE(svia_bar_sizes); i++)
                if ((pci_resource_start(pdev, i) == 0) ||
                    (pci_resource_len(pdev, i) < bar_sizes[i])) {
                        dev_printk(KERN_ERR, &pdev->dev,
                                "invalid PCI BAR %u (sz 0x%llx, val 0x%llx)\n",
                                i,
                                (unsigned long long)pci_resource_start(pdev, i),
                                (unsigned long long)pci_resource_len(pdev, i));
                        return -ENODEV;
                }

        if (board_id == vt6420)
                rc = vt6420_prepare_host(pdev, &host);
        else
                rc = vt6421_prepare_host(pdev, &host);
        if (rc)
                return rc;

        svia_configure(pdev);

        pci_set_master(pdev);
        return ata_host_activate(host, pdev->irq, ata_interrupt, IRQF_SHARED,
                                 &svia_sht);
}

static int __init svia_init(void)
{
        return pci_register_driver(&svia_pci_driver);
}

static void __exit svia_exit(void)
{
        pci_unregister_driver(&svia_pci_driver);
}

module_init(svia_init);
module_exit(svia_exit);