1 files changed, 387 insertions, 0 deletions

diff --git a/drivers/scsi/sata_via.c b/drivers/scsi/sata_via.c
new file mode 100644
index 000000000000..3a7830667277
--- /dev/null
+++ b/drivers/scsi/sata_via.c
@@ -0,0 +1,387 @@
+/*
+   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
+
+   The contents of this file are subject to the Open
+   Software License version 1.1 that can be found at
+   http://www.opensource.org/licenses/osl-1.1.txt and is included herein
+   by reference.
+
+   Alternatively, the contents of this file may be used under the terms
+   of the GNU General Public License version 2 (the "GPL") as distributed
+   in the kernel source COPYING file, in which case the provisions of
+   the GPL are applicable instead of the above.  If you wish to allow
+   the use of your version of this file only under the terms of the
+   GPL and not to allow others to use your version of this file under
+   the OSL, indicate your decision by deleting the provisions above and
+   replace them with the notice and other provisions required by the GPL.
+   If you do not delete the provisions above, a recipient may use your
+   version of this file under either the OSL or the GPL.
+
+   ----------------------------------------------------------------------
+
+   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 "scsi.h"
+#include <scsi/scsi_host.h>
+#include <linux/libata.h>
+#include <asm/io.h>
+
+#define DRV_NAME        "sata_via"
+#define DRV_VERSION     "1.1"
+
+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 struct pci_device_id svia_pci_tbl[] = {
+        { 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 Scsi_Host_Template svia_sht = {
+        .module                 = THIS_MODULE,
+        .name                   = DRV_NAME,
+        .ioctl                  = ata_scsi_ioctl,
+        .queuecommand           = ata_scsi_queuecmd,
+        .eh_strategy_handler    = ata_scsi_error,
+        .can_queue              = ATA_DEF_QUEUE,
+        .this_id                = ATA_SHT_THIS_ID,
+        .sg_tablesize           = LIBATA_MAX_PRD,
+        .max_sectors            = ATA_MAX_SECTORS,
+        .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,
+        .bios_param             = ata_std_bios_param,
+        .ordered_flush          = 1,
+};
+
+static struct ata_port_operations svia_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,
+
+        .phy_reset              = sata_phy_reset,
+
+        .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,
+
+        .eng_timeout            = ata_eng_timeout,
+
+        .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,
+};
+
+static struct ata_port_info svia_port_info = {
+        .sht            = &svia_sht,
+        .host_flags     = ATA_FLAG_SATA | ATA_FLAG_SRST | ATA_FLAG_NO_LEGACY,
+        .pio_mask       = 0x1f,
+        .mwdma_mask     = 0x07,
+        .udma_mask      = 0x7f,
+        .port_ops       = &svia_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));
+}
+
+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 = &svia_port_info;
+
+        probe_ent = ata_pci_init_native_mode(pdev, &ppi);
+        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->host_flags   = ATA_FLAG_SATA | ATA_FLAG_SATA_RESET |
+                                  ATA_FLAG_NO_LEGACY;
+        probe_ent->port_ops     = &svia_sata_ops;
+        probe_ent->n_ports      = N_PORTS;
+        probe_ent->irq          = pdev->irq;
+        probe_ent->irq_flags    = SA_SHIRQ;
+        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);
+        printk(KERN_INFO DRV_NAME "(%s): routed to hard irq line %d\n",
+               pci_name(pdev),
+               (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) {
+                printk(KERN_DEBUG DRV_NAME "(%s): enabling SATA channels (0x%x)\n",
+                       pci_name(pdev), (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) {
+                printk(KERN_DEBUG DRV_NAME "(%s): enabling SATA channel interrupts (0x%x)\n",
+                       pci_name(pdev), (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) {
+                printk(KERN_DEBUG DRV_NAME "(%s): enabling SATA channel native mode (0x%x)\n",
+                       pci_name(pdev), (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++)
+                printk(KERN_DEBUG DRV_NAME " 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) {
+                        printk(KERN_ERR DRV_NAME "(%s): SATA master/slave not supported (0x%x)\n",
+                        pci_name(pdev), (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])) {
+                        printk(KERN_ERR DRV_NAME "(%s): invalid PCI BAR %u (sz 0x%lx, val 0x%lx)\n",
+                               pci_name(pdev), i,
+                               pci_resource_start(pdev, i),
+                               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) {
+                printk(KERN_ERR DRV_NAME "(%s): out of memory\n",
+                       pci_name(pdev));
+                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_module_init(&svia_pci_driver);
+}
+
+static void __exit svia_exit(void)
+{
+        pci_unregister_driver(&svia_pci_driver);
+}
+
+module_init(svia_init);
+module_exit(svia_exit);
+