1 files changed, 502 insertions, 0 deletions

diff --git a/drivers/ata/sata_via.c b/drivers/ata/sata_via.c
new file mode 100644
index 000000000000..7f087aef99de
--- /dev/null
+++ b/drivers/ata/sata_via.c
@@ -0,0 +1,502 @@
+/*
+ *  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.
+ *
+ *
+ *  To-do list:
+ *  - VT6421 PATA support
+ *
+ */
+
+#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 <asm/io.h>
+
+#define DRV_NAME        "sata_via"
+#define DRV_VERSION     "2.0"
+
+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 */
+        SATA_PATA_SHARING       = 0x49, /* PATA/SATA sharing func ctrl */
+
+        PORT0                   = (1 << 1),
+        PORT1                   = (1 << 0),
+        ALL_PORTS               = PORT0 | PORT1,
+        N_PORTS                 = 2,
+
+        NATIVE_MODE_ALL         = (1 << 7) | (1 << 6) | (1 << 5) | (1 << 4),
+
+        SATA_EXT_PHY            = (1 << 6), /* 0==use PATA, 1==ext phy */
+        SATA_2DEV               = (1 << 5), /* SATA is master/slave */
+};
+
+static int svia_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
+static u32 svia_scr_read (struct ata_port *ap, unsigned int sc_reg);
+static void svia_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
+static void vt6420_error_handler(struct ata_port *ap);
+
+static const struct pci_device_id svia_pci_tbl[] = {
+        { 0x1106, 0x0591, PCI_ANY_ID, PCI_ANY_ID, 0, 0, vt6420 },
+        { 0x1106, 0x3149, PCI_ANY_ID, PCI_ANY_ID, 0, 0, vt6420 },
+        { 0x1106, 0x3249, PCI_ANY_ID, PCI_ANY_ID, 0, 0, vt6421 },
+
+        { }     /* terminate list */
+};
+
+static struct pci_driver svia_pci_driver = {
+        .name                   = DRV_NAME,
+        .id_table               = svia_pci_tbl,
+        .probe                  = svia_init_one,
+        .remove                 = ata_pci_remove_one,
+};
+
+static struct scsi_host_template svia_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 vt6420_sata_ops = {
+        .port_disable           = ata_port_disable,
+
+        .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_pio_data_xfer,
+
+        .freeze                 = ata_bmdma_freeze,
+        .thaw                   = ata_bmdma_thaw,
+        .error_handler          = vt6420_error_handler,
+        .post_internal_cmd      = ata_bmdma_post_internal_cmd,
+
+        .irq_handler            = ata_interrupt,
+        .irq_clear              = ata_bmdma_irq_clear,
+
+        .port_start             = ata_port_start,
+        .port_stop              = ata_port_stop,
+        .host_stop              = ata_host_stop,
+};
+
+static const struct ata_port_operations vt6421_sata_ops = {
+        .port_disable           = ata_port_disable,
+
+        .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_pio_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_handler            = ata_interrupt,
+        .irq_clear              = ata_bmdma_irq_clear,
+
+        .scr_read               = svia_scr_read,
+        .scr_write              = svia_scr_write,
+
+        .port_start             = ata_port_start,
+        .port_stop              = ata_port_stop,
+        .host_stop              = ata_host_stop,
+};
+
+static struct ata_port_info vt6420_port_info = {
+        .sht            = &svia_sht,
+        .flags          = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY,
+        .pio_mask       = 0x1f,
+        .mwdma_mask     = 0x07,
+        .udma_mask      = 0x7f,
+        .port_ops       = &vt6420_sata_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 u32 svia_scr_read (struct ata_port *ap, unsigned int sc_reg)
+{
+        if (sc_reg > SCR_CONTROL)
+                return 0xffffffffU;
+        return inl(ap->ioaddr.scr_addr + (4 * sc_reg));
+}
+
+static void svia_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val)
+{
+        if (sc_reg > SCR_CONTROL)
+                return;
+        outl(val, ap->ioaddr.scr_addr + (4 * sc_reg));
+}
+
+/**
+ *      vt6420_prereset - prereset for vt6420
+ *      @ap: target ATA port
+ *
+ *      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_port *ap)
+{
+        struct ata_eh_context *ehc = &ap->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 (!ATA_PFLAG_LOADING)
+                goto skip_scr;
+
+        /* Resume phy.  This is the old resume sequence from
+         * __sata_phy_reset().
+         */
+        svia_scr_write(ap, SCR_CONTROL, 0x300);
+        svia_scr_read(ap, SCR_CONTROL); /* flush */
+
+        /* wait for phy to become ready, if necessary */
+        do {
+                msleep(200);
+                if ((svia_scr_read(ap, SCR_STATUS) & 0xf) != 1)
+                        break;
+        } while (time_before(jiffies, timeout));
+
+        /* open code sata_print_link_status() */
+        sstatus = svia_scr_read(ap, SCR_STATUS);
+        scontrol = svia_scr_read(ap, SCR_CONTROL);
+
+        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);
+
+        if (!online) {
+                /* tell EH to bail */
+                ehc->i.action &= ~ATA_EH_RESET_MASK;
+                return 0;
+        }
+
+ skip_scr:
+        /* wait for !BSY */
+        ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
+
+        return 0;
+}
+
+static void vt6420_error_handler(struct ata_port *ap)
+{
+        return ata_bmdma_drive_eh(ap, vt6420_prereset, ata_std_softreset,
+                                  NULL, ata_std_postreset);
+}
+
+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 unsigned long svia_scr_addr(unsigned long addr, unsigned int port)
+{
+        return addr + (port * 128);
+}
+
+static unsigned long vt6421_scr_addr(unsigned long addr, unsigned int port)
+{
+        return addr + (port * 64);
+}
+
+static void vt6421_init_addrs(struct ata_probe_ent *probe_ent,
+                              struct pci_dev *pdev,
+                              unsigned int port)
+{
+        unsigned long reg_addr = pci_resource_start(pdev, port);
+        unsigned long bmdma_addr = pci_resource_start(pdev, 4) + (port * 8);
+        unsigned long scr_addr;
+
+        probe_ent->port[port].cmd_addr = reg_addr;
+        probe_ent->port[port].altstatus_addr =
+        probe_ent->port[port].ctl_addr = (reg_addr + 8) | ATA_PCI_CTL_OFS;
+        probe_ent->port[port].bmdma_addr = bmdma_addr;
+
+        scr_addr = vt6421_scr_addr(pci_resource_start(pdev, 5), port);
+        probe_ent->port[port].scr_addr = scr_addr;
+
+        ata_std_ports(&probe_ent->port[port]);
+}
+
+static struct ata_probe_ent *vt6420_init_probe_ent(struct pci_dev *pdev)
+{
+        struct ata_probe_ent *probe_ent;
+        struct ata_port_info *ppi = &vt6420_port_info;
+
+        probe_ent = ata_pci_init_native_mode(pdev, &ppi, ATA_PORT_PRIMARY | ATA_PORT_SECONDARY);
+        if (!probe_ent)
+                return NULL;
+
+        probe_ent->port[0].scr_addr =
+                svia_scr_addr(pci_resource_start(pdev, 5), 0);
+        probe_ent->port[1].scr_addr =
+                svia_scr_addr(pci_resource_start(pdev, 5), 1);
+
+        return probe_ent;
+}
+
+static struct ata_probe_ent *vt6421_init_probe_ent(struct pci_dev *pdev)
+{
+        struct ata_probe_ent *probe_ent;
+        unsigned int i;
+
+        probe_ent = kmalloc(sizeof(*probe_ent), GFP_KERNEL);
+        if (!probe_ent)
+                return NULL;
+
+        memset(probe_ent, 0, sizeof(*probe_ent));
+        probe_ent->dev = pci_dev_to_dev(pdev);
+        INIT_LIST_HEAD(&probe_ent->node);
+
+        probe_ent->sht          = &svia_sht;
+        probe_ent->port_flags   = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY;
+        probe_ent->port_ops     = &vt6421_sata_ops;
+        probe_ent->n_ports      = N_PORTS;
+        probe_ent->irq          = pdev->irq;
+        probe_ent->irq_flags    = IRQF_SHARED;
+        probe_ent->pio_mask     = 0x1f;
+        probe_ent->mwdma_mask   = 0x07;
+        probe_ent->udma_mask    = 0x7f;
+
+        for (i = 0; i < N_PORTS; i++)
+                vt6421_init_addrs(probe_ent, pdev, i);
+
+        return probe_ent;
+}
+
+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_probe_ent *probe_ent;
+        int board_id = (int) ent->driver_data;
+        const int *bar_sizes;
+        int pci_dev_busy = 0;
+        u8 tmp8;
+
+        if (!printed_version++)
+                dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
+
+        rc = pci_enable_device(pdev);
+        if (rc)
+                return rc;
+
+        rc = pci_request_regions(pdev, DRV_NAME);
+        if (rc) {
+                pci_dev_busy = 1;
+                goto err_out;
+        }
+
+        if (board_id == vt6420) {
+                pci_read_config_byte(pdev, SATA_PATA_SHARING, &tmp8);
+                if (tmp8 & SATA_2DEV) {
+                        dev_printk(KERN_ERR, &pdev->dev,
+                                   "SATA master/slave not supported (0x%x)\n",
+                                   (int) tmp8);
+                        rc = -EIO;
+                        goto err_out_regions;
+                }
+
+                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));
+                        rc = -ENODEV;
+                        goto err_out_regions;
+                }
+
+        rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
+        if (rc)
+                goto err_out_regions;
+        rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
+        if (rc)
+                goto err_out_regions;
+
+        if (board_id == vt6420)
+                probe_ent = vt6420_init_probe_ent(pdev);
+        else
+                probe_ent = vt6421_init_probe_ent(pdev);
+
+        if (!probe_ent) {
+                dev_printk(KERN_ERR, &pdev->dev, "out of memory\n");
+                rc = -ENOMEM;
+                goto err_out_regions;
+        }
+
+        svia_configure(pdev);
+
+        pci_set_master(pdev);
+
+        /* FIXME: check ata_device_add return value */
+        ata_device_add(probe_ent);
+        kfree(probe_ent);
+
+        return 0;
+
+err_out_regions:
+        pci_release_regions(pdev);
+err_out:
+        if (!pci_dev_busy)
+                pci_disable_device(pdev);
+        return rc;
+}
+
+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);
+