edac: AMD8111 driver source file

Introduce AMD8111 EDAC driver source file, which makes use of error
detections on the LPC Bridge Controller and PCI Bridge Controller on the
AMD8111 HyperTransport I/O Hub.

Signed-off-by: Harry Ciao <qingtao.cao@windriver.com>
Cc: Doug Thompson <norsk5@yahoo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 595 insertions, 0 deletions

diff --git a/drivers/edac/amd8111_edac.c b/drivers/edac/amd8111_edac.c
new file mode 100644
index 000000000000..614692181120
--- /dev/null
+++ b/drivers/edac/amd8111_edac.c
@@ -0,0 +1,595 @@
+/*
+ * amd8111_edac.c, AMD8111 Hyper Transport chip EDAC kernel module
+ *
+ * Copyright (c) 2008 Wind River Systems, Inc.
+ *
+ * Authors:     Cao Qingtao <qingtao.cao@windriver.com>
+ *              Benjamin Walsh <benjamin.walsh@windriver.com>
+ *              Hu Yongqi <yongqi.hu@windriver.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * 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; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/bitops.h>
+#include <linux/edac.h>
+#include <linux/pci_ids.h>
+#include <asm/io.h>
+
+#include "edac_core.h"
+#include "edac_module.h"
+#include "amd8111_edac.h"
+
+#define AMD8111_EDAC_REVISION   " Ver: 1.0.0 " __DATE__
+#define AMD8111_EDAC_MOD_STR    "amd8111_edac"
+
+#define PCI_DEVICE_ID_AMD_8111_PCI      0x7460
+static int edac_dev_idx;
+
+enum amd8111_edac_devs {
+        LPC_BRIDGE = 0,
+};
+
+enum amd8111_edac_pcis {
+        PCI_BRIDGE = 0,
+};
+
+/* Wrapper functions for accessing PCI configuration space */
+static int edac_pci_read_dword(struct pci_dev *dev, int reg, u32 *val32)
+{
+        int ret;
+
+        ret = pci_read_config_dword(dev, reg, val32);
+        if (ret != 0)
+                printk(KERN_ERR AMD8111_EDAC_MOD_STR
+                        " PCI Access Read Error at 0x%x\n", reg);
+
+        return ret;
+}
+
+static void edac_pci_read_byte(struct pci_dev *dev, int reg, u8 *val8)
+{
+        int ret;
+
+        ret = pci_read_config_byte(dev, reg, val8);
+        if (ret != 0)
+                printk(KERN_ERR AMD8111_EDAC_MOD_STR
+                        " PCI Access Read Error at 0x%x\n", reg);
+}
+
+static void edac_pci_write_dword(struct pci_dev *dev, int reg, u32 val32)
+{
+        int ret;
+
+        ret = pci_write_config_dword(dev, reg, val32);
+        if (ret != 0)
+                printk(KERN_ERR AMD8111_EDAC_MOD_STR
+                        " PCI Access Write Error at 0x%x\n", reg);
+}
+
+static void edac_pci_write_byte(struct pci_dev *dev, int reg, u8 val8)
+{
+        int ret;
+
+        ret = pci_write_config_byte(dev, reg, val8);
+        if (ret != 0)
+                printk(KERN_ERR AMD8111_EDAC_MOD_STR
+                        " PCI Access Write Error at 0x%x\n", reg);
+}
+
+/*
+ * device-specific methods for amd8111 PCI Bridge Controller
+ *
+ * Error Reporting and Handling for amd8111 chipset could be found
+ * in its datasheet 3.1.2 section, P37
+ */
+static void amd8111_pci_bridge_init(struct amd8111_pci_info *pci_info)
+{
+        u32 val32;
+        struct pci_dev *dev = pci_info->dev;
+
+        /* First clear error detection flags on the host interface */
+
+        /* Clear SSE/SMA/STA flags in the global status register*/
+        edac_pci_read_dword(dev, REG_PCI_STSCMD, &val32);
+        if (val32 & PCI_STSCMD_CLEAR_MASK)
+                edac_pci_write_dword(dev, REG_PCI_STSCMD, val32);
+
+        /* Clear CRC and Link Fail flags in HT Link Control reg */
+        edac_pci_read_dword(dev, REG_HT_LINK, &val32);
+        if (val32 & HT_LINK_CLEAR_MASK)
+                edac_pci_write_dword(dev, REG_HT_LINK, val32);
+
+        /* Second clear all fault on the secondary interface */
+
+        /* Clear error flags in the memory-base limit reg. */
+        edac_pci_read_dword(dev, REG_MEM_LIM, &val32);
+        if (val32 & MEM_LIMIT_CLEAR_MASK)
+                edac_pci_write_dword(dev, REG_MEM_LIM, val32);
+
+        /* Clear Discard Timer Expired flag in Interrupt/Bridge Control reg */
+        edac_pci_read_dword(dev, REG_PCI_INTBRG_CTRL, &val32);
+        if (val32 & PCI_INTBRG_CTRL_CLEAR_MASK)
+                edac_pci_write_dword(dev, REG_PCI_INTBRG_CTRL, val32);
+
+        /* Last enable error detections */
+        if (edac_op_state == EDAC_OPSTATE_POLL) {
+                /* Enable System Error reporting in global status register */
+                edac_pci_read_dword(dev, REG_PCI_STSCMD, &val32);
+                val32 |= PCI_STSCMD_SERREN;
+                edac_pci_write_dword(dev, REG_PCI_STSCMD, val32);
+
+                /* Enable CRC Sync flood packets to HyperTransport Link */
+                edac_pci_read_dword(dev, REG_HT_LINK, &val32);
+                val32 |= HT_LINK_CRCFEN;
+                edac_pci_write_dword(dev, REG_HT_LINK, val32);
+
+                /* Enable SSE reporting etc in Interrupt control reg */
+                edac_pci_read_dword(dev, REG_PCI_INTBRG_CTRL, &val32);
+                val32 |= PCI_INTBRG_CTRL_POLL_MASK;
+                edac_pci_write_dword(dev, REG_PCI_INTBRG_CTRL, val32);
+        }
+}
+
+static void amd8111_pci_bridge_exit(struct amd8111_pci_info *pci_info)
+{
+        u32 val32;
+        struct pci_dev *dev = pci_info->dev;
+
+        if (edac_op_state == EDAC_OPSTATE_POLL) {
+                /* Disable System Error reporting */
+                edac_pci_read_dword(dev, REG_PCI_STSCMD, &val32);
+                val32 &= ~PCI_STSCMD_SERREN;
+                edac_pci_write_dword(dev, REG_PCI_STSCMD, val32);
+
+                /* Disable CRC flood packets */
+                edac_pci_read_dword(dev, REG_HT_LINK, &val32);
+                val32 &= ~HT_LINK_CRCFEN;
+                edac_pci_write_dword(dev, REG_HT_LINK, val32);
+
+                /* Disable DTSERREN/MARSP/SERREN in Interrupt Control reg */
+                edac_pci_read_dword(dev, REG_PCI_INTBRG_CTRL, &val32);
+                val32 &= ~PCI_INTBRG_CTRL_POLL_MASK;
+                edac_pci_write_dword(dev, REG_PCI_INTBRG_CTRL, val32);
+        }
+}
+
+static void amd8111_pci_bridge_check(struct edac_pci_ctl_info *edac_dev)
+{
+        struct amd8111_pci_info *pci_info = edac_dev->pvt_info;
+        struct pci_dev *dev = pci_info->dev;
+        u32 val32;
+
+        /* Check out PCI Bridge Status and Command Register */
+        edac_pci_read_dword(dev, REG_PCI_STSCMD, &val32);
+        if (val32 & PCI_STSCMD_CLEAR_MASK) {
+                printk(KERN_INFO "Error(s) in PCI bridge status and command"
+                        "register on device %s\n", pci_info->ctl_name);
+                printk(KERN_INFO "SSE: %d, RMA: %d, RTA: %d\n",
+                        (val32 & PCI_STSCMD_SSE) != 0,
+                        (val32 & PCI_STSCMD_RMA) != 0,
+                        (val32 & PCI_STSCMD_RTA) != 0);
+
+                val32 |= PCI_STSCMD_CLEAR_MASK;
+                edac_pci_write_dword(dev, REG_PCI_STSCMD, val32);
+
+                edac_pci_handle_npe(edac_dev, edac_dev->ctl_name);
+        }
+
+        /* Check out HyperTransport Link Control Register */
+        edac_pci_read_dword(dev, REG_HT_LINK, &val32);
+        if (val32 & HT_LINK_LKFAIL) {
+                printk(KERN_INFO "Error(s) in hypertransport link control"
+                        "register on device %s\n", pci_info->ctl_name);
+                printk(KERN_INFO "LKFAIL: %d\n",
+                        (val32 & HT_LINK_LKFAIL) != 0);
+
+                val32 |= HT_LINK_LKFAIL;
+                edac_pci_write_dword(dev, REG_HT_LINK, val32);
+
+                edac_pci_handle_npe(edac_dev, edac_dev->ctl_name);
+        }
+
+        /* Check out PCI Interrupt and Bridge Control Register */
+        edac_pci_read_dword(dev, REG_PCI_INTBRG_CTRL, &val32);
+        if (val32 & PCI_INTBRG_CTRL_DTSTAT) {
+                printk(KERN_INFO "Error(s) in PCI interrupt and bridge control"
+                        "register on device %s\n", pci_info->ctl_name);
+                printk(KERN_INFO "DTSTAT: %d\n",
+                        (val32 & PCI_INTBRG_CTRL_DTSTAT) != 0);
+
+                val32 |= PCI_INTBRG_CTRL_DTSTAT;
+                edac_pci_write_dword(dev, REG_PCI_INTBRG_CTRL, val32);
+
+                edac_pci_handle_npe(edac_dev, edac_dev->ctl_name);
+        }
+
+        /* Check out PCI Bridge Memory Base-Limit Register */
+        edac_pci_read_dword(dev, REG_MEM_LIM, &val32);
+        if (val32 & MEM_LIMIT_CLEAR_MASK) {
+                printk(KERN_INFO
+                        "Error(s) in mem limit register on %s device\n",
+                        pci_info->ctl_name);
+                printk(KERN_INFO "DPE: %d, RSE: %d, RMA: %d\n"
+                        "RTA: %d, STA: %d, MDPE: %d\n",
+                        (val32 & MEM_LIMIT_DPE)  != 0,
+                        (val32 & MEM_LIMIT_RSE)  != 0,
+                        (val32 & MEM_LIMIT_RMA)  != 0,
+                        (val32 & MEM_LIMIT_RTA)  != 0,
+                        (val32 & MEM_LIMIT_STA)  != 0,
+                        (val32 & MEM_LIMIT_MDPE) != 0);
+
+                val32 |= MEM_LIMIT_CLEAR_MASK;
+                edac_pci_write_dword(dev, REG_MEM_LIM, val32);
+
+                edac_pci_handle_npe(edac_dev, edac_dev->ctl_name);
+        }
+}
+
+static struct resource *legacy_io_res;
+static int at_compat_reg_broken;
+#define LEGACY_NR_PORTS 1
+
+/* device-specific methods for amd8111 LPC Bridge device */
+static void amd8111_lpc_bridge_init(struct amd8111_dev_info *dev_info)
+{
+        u8 val8;
+        struct pci_dev *dev = dev_info->dev;
+
+        /* First clear REG_AT_COMPAT[SERR, IOCHK] if necessary */
+        legacy_io_res = request_region(REG_AT_COMPAT, LEGACY_NR_PORTS,
+                                        AMD8111_EDAC_MOD_STR);
+        if (!legacy_io_res)
+                printk(KERN_INFO "%s: failed to request legacy I/O region "
+                        "start %d, len %d\n", __func__,
+                        REG_AT_COMPAT, LEGACY_NR_PORTS);
+        else {
+                val8 = __do_inb(REG_AT_COMPAT);
+                if (val8 == 0xff) { /* buggy port */
+                        printk(KERN_INFO "%s: port %d is buggy, not supported"
+                                " by hardware?\n", __func__, REG_AT_COMPAT);
+                        at_compat_reg_broken = 1;
+                        release_region(REG_AT_COMPAT, LEGACY_NR_PORTS);
+                        legacy_io_res = NULL;
+                } else {
+                        u8 out8 = 0;
+                        if (val8 & AT_COMPAT_SERR)
+                                out8 = AT_COMPAT_CLRSERR;
+                        if (val8 & AT_COMPAT_IOCHK)
+                                out8 |= AT_COMPAT_CLRIOCHK;
+                        if (out8 > 0)
+                                __do_outb(out8, REG_AT_COMPAT);
+                }
+        }
+
+        /* Second clear error flags on LPC bridge */
+        edac_pci_read_byte(dev, REG_IO_CTRL_1, &val8);
+        if (val8 & IO_CTRL_1_CLEAR_MASK)
+                edac_pci_write_byte(dev, REG_IO_CTRL_1, val8);
+}
+
+static void amd8111_lpc_bridge_exit(struct amd8111_dev_info *dev_info)
+{
+        if (legacy_io_res)
+                release_region(REG_AT_COMPAT, LEGACY_NR_PORTS);
+}
+
+static void amd8111_lpc_bridge_check(struct edac_device_ctl_info *edac_dev)
+{
+        struct amd8111_dev_info *dev_info = edac_dev->pvt_info;
+        struct pci_dev *dev = dev_info->dev;
+        u8 val8;
+
+        edac_pci_read_byte(dev, REG_IO_CTRL_1, &val8);
+        if (val8 & IO_CTRL_1_CLEAR_MASK) {
+                printk(KERN_INFO
+                        "Error(s) in IO control register on %s device\n",
+                        dev_info->ctl_name);
+                printk(KERN_INFO "LPC ERR: %d, PW2LPC: %d\n",
+                        (val8 & IO_CTRL_1_LPC_ERR) != 0,
+                        (val8 & IO_CTRL_1_PW2LPC) != 0);
+
+                val8 |= IO_CTRL_1_CLEAR_MASK;
+                edac_pci_write_byte(dev, REG_IO_CTRL_1, val8);
+
+                edac_device_handle_ue(edac_dev, 0, 0, edac_dev->ctl_name);
+        }
+
+        if (at_compat_reg_broken == 0) {
+                u8 out8 = 0;
+                val8 = __do_inb(REG_AT_COMPAT);
+                if (val8 & AT_COMPAT_SERR)
+                        out8 = AT_COMPAT_CLRSERR;
+                if (val8 & AT_COMPAT_IOCHK)
+                        out8 |= AT_COMPAT_CLRIOCHK;
+                if (out8 > 0) {
+                        __do_outb(out8, REG_AT_COMPAT);
+                        edac_device_handle_ue(edac_dev, 0, 0,
+                                                edac_dev->ctl_name);
+                }
+        }
+}
+
+/* General devices represented by edac_device_ctl_info */
+static struct amd8111_dev_info amd8111_devices[] = {
+        [LPC_BRIDGE] = {
+                .err_dev = PCI_DEVICE_ID_AMD_8111_LPC,
+                .ctl_name = "lpc",
+                .init = amd8111_lpc_bridge_init,
+                .exit = amd8111_lpc_bridge_exit,
+                .check = amd8111_lpc_bridge_check,
+        },
+        {0},
+};
+
+/* PCI controllers represented by edac_pci_ctl_info */
+static struct amd8111_pci_info amd8111_pcis[] = {
+        [PCI_BRIDGE] = {
+                .err_dev = PCI_DEVICE_ID_AMD_8111_PCI,
+                .ctl_name = "AMD8111_PCI_Controller",
+                .init = amd8111_pci_bridge_init,
+                .exit = amd8111_pci_bridge_exit,
+                .check = amd8111_pci_bridge_check,
+        },
+        {0},
+};
+
+static int amd8111_dev_probe(struct pci_dev *dev,
+                                const struct pci_device_id *id)
+{
+        struct amd8111_dev_info *dev_info = &amd8111_devices[id->driver_data];
+
+        dev_info->dev = pci_get_device(PCI_VENDOR_ID_AMD,
+                                        dev_info->err_dev, NULL);
+
+        if (!dev_info->dev) {
+                printk(KERN_ERR "EDAC device not found:"
+                        "vendor %x, device %x, name %s\n",
+                        PCI_VENDOR_ID_AMD, dev_info->err_dev,
+                        dev_info->ctl_name);
+                return -ENODEV;
+        }
+
+        if (pci_enable_device(dev_info->dev)) {
+                pci_dev_put(dev_info->dev);
+                printk(KERN_ERR "failed to enable:"
+                        "vendor %x, device %x, name %s\n",
+                        PCI_VENDOR_ID_AMD, dev_info->err_dev,
+                        dev_info->ctl_name);
+                return -ENODEV;
+        }
+
+        /*
+         * we do not allocate extra private structure for
+         * edac_device_ctl_info, but make use of existing
+         * one instead.
+        */
+        dev_info->edac_idx = edac_dev_idx++;
+        dev_info->edac_dev =
+                edac_device_alloc_ctl_info(0, dev_info->ctl_name, 1,
+                                           NULL, 0, 0,
+                                           NULL, 0, dev_info->edac_idx);
+        if (!dev_info->edac_dev)
+                return -ENOMEM;
+
+        dev_info->edac_dev->pvt_info = dev_info;
+        dev_info->edac_dev->dev = &dev_info->dev->dev;
+        dev_info->edac_dev->mod_name = AMD8111_EDAC_MOD_STR;
+        dev_info->edac_dev->ctl_name = dev_info->ctl_name;
+        dev_info->edac_dev->dev_name = dev_info->dev->dev.bus_id;
+
+        if (edac_op_state == EDAC_OPSTATE_POLL)
+                dev_info->edac_dev->edac_check = dev_info->check;
+
+        if (dev_info->init)
+                dev_info->init(dev_info);
+
+        if (edac_device_add_device(dev_info->edac_dev) > 0) {
+                printk(KERN_ERR "failed to add edac_dev for %s\n",
+                        dev_info->ctl_name);
+                edac_device_free_ctl_info(dev_info->edac_dev);
+                return -ENODEV;
+        }
+
+        printk(KERN_INFO "added one edac_dev on AMD8111 "
+                "vendor %x, device %x, name %s\n",
+                PCI_VENDOR_ID_AMD, dev_info->err_dev,
+                dev_info->ctl_name);
+
+        return 0;
+}
+
+static void amd8111_dev_remove(struct pci_dev *dev)
+{
+        struct amd8111_dev_info *dev_info;
+
+        for (dev_info = amd8111_devices; dev_info->err_dev; dev_info++)
+                if (dev_info->dev->device == dev->device)
+                        break;
+
+        if (!dev_info->err_dev) /* should never happen */
+                return;
+
+        if (dev_info->edac_dev) {
+                edac_device_del_device(dev_info->edac_dev->dev);
+                edac_device_free_ctl_info(dev_info->edac_dev);
+        }
+
+        if (dev_info->exit)
+                dev_info->exit(dev_info);
+
+        pci_dev_put(dev_info->dev);
+}
+
+static int amd8111_pci_probe(struct pci_dev *dev,
+                                const struct pci_device_id *id)
+{
+        struct amd8111_pci_info *pci_info = &amd8111_pcis[id->driver_data];
+
+        pci_info->dev = pci_get_device(PCI_VENDOR_ID_AMD,
+                                        pci_info->err_dev, NULL);
+
+        if (!pci_info->dev) {
+                printk(KERN_ERR "EDAC device not found:"
+                        "vendor %x, device %x, name %s\n",
+                        PCI_VENDOR_ID_AMD, pci_info->err_dev,
+                        pci_info->ctl_name);
+                return -ENODEV;
+        }
+
+        if (pci_enable_device(pci_info->dev)) {
+                pci_dev_put(pci_info->dev);
+                printk(KERN_ERR "failed to enable:"
+                        "vendor %x, device %x, name %s\n",
+                        PCI_VENDOR_ID_AMD, pci_info->err_dev,
+                        pci_info->ctl_name);
+                return -ENODEV;
+        }
+
+        /*
+         * we do not allocate extra private structure for
+         * edac_pci_ctl_info, but make use of existing
+         * one instead.
+        */
+        pci_info->edac_idx = edac_pci_alloc_index();
+        pci_info->edac_dev = edac_pci_alloc_ctl_info(0, pci_info->ctl_name);
+        if (!pci_info->edac_dev)
+                return -ENOMEM;
+
+        pci_info->edac_dev->pvt_info = pci_info;
+        pci_info->edac_dev->dev = &pci_info->dev->dev;
+        pci_info->edac_dev->mod_name = AMD8111_EDAC_MOD_STR;
+        pci_info->edac_dev->ctl_name = pci_info->ctl_name;
+        pci_info->edac_dev->dev_name = pci_info->dev->dev.bus_id;
+
+        if (edac_op_state == EDAC_OPSTATE_POLL)
+                pci_info->edac_dev->edac_check = pci_info->check;
+
+        if (pci_info->init)
+                pci_info->init(pci_info);
+
+        if (edac_pci_add_device(pci_info->edac_dev, pci_info->edac_idx) > 0) {
+                printk(KERN_ERR "failed to add edac_pci for %s\n",
+                        pci_info->ctl_name);
+                edac_pci_free_ctl_info(pci_info->edac_dev);
+                return -ENODEV;
+        }
+
+        printk(KERN_INFO "added one edac_pci on AMD8111 "
+                "vendor %x, device %x, name %s\n",
+                PCI_VENDOR_ID_AMD, pci_info->err_dev,
+                pci_info->ctl_name);
+
+        return 0;
+}
+
+static void amd8111_pci_remove(struct pci_dev *dev)
+{
+        struct amd8111_pci_info *pci_info;
+
+        for (pci_info = amd8111_pcis; pci_info->err_dev; pci_info++)
+                if (pci_info->dev->device == dev->device)
+                        break;
+
+        if (!pci_info->err_dev) /* should never happen */
+                return;
+
+        if (pci_info->edac_dev) {
+                edac_pci_del_device(pci_info->edac_dev->dev);
+                edac_pci_free_ctl_info(pci_info->edac_dev);
+        }
+
+        if (pci_info->exit)
+                pci_info->exit(pci_info);
+
+        pci_dev_put(pci_info->dev);
+}
+
+/* PCI Device ID talbe for general EDAC device */
+static const struct pci_device_id amd8111_edac_dev_tbl[] = {
+        {
+        PCI_VEND_DEV(AMD, 8111_LPC),
+        .subvendor = PCI_ANY_ID,
+        .subdevice = PCI_ANY_ID,
+        .class = 0,
+        .class_mask = 0,
+        .driver_data = LPC_BRIDGE,
+        },
+        {
+        0,
+        }                       /* table is NULL-terminated */
+};
+MODULE_DEVICE_TABLE(pci, amd8111_edac_dev_tbl);
+
+static struct pci_driver amd8111_edac_dev_driver = {
+        .name = "AMD8111_EDAC_DEV",
+        .probe = amd8111_dev_probe,
+        .remove = amd8111_dev_remove,
+        .id_table = amd8111_edac_dev_tbl,
+};
+
+/* PCI Device ID table for EDAC PCI controller */
+static const struct pci_device_id amd8111_edac_pci_tbl[] = {
+        {
+        PCI_VEND_DEV(AMD, 8111_PCI),
+        .subvendor = PCI_ANY_ID,
+        .subdevice = PCI_ANY_ID,
+        .class = 0,
+        .class_mask = 0,
+        .driver_data = PCI_BRIDGE,
+        },
+        {
+        0,
+        }                       /* table is NULL-terminated */
+};
+MODULE_DEVICE_TABLE(pci, amd8111_edac_pci_tbl);
+
+static struct pci_driver amd8111_edac_pci_driver = {
+        .name = "AMD8111_EDAC_PCI",
+        .probe = amd8111_pci_probe,
+        .remove = amd8111_pci_remove,
+        .id_table = amd8111_edac_pci_tbl,
+};
+
+static int __init amd8111_edac_init(void)
+{
+        int val;
+
+        printk(KERN_INFO "AMD8111 EDAC driver " AMD8111_EDAC_REVISION "\n");
+        printk(KERN_INFO "\t(c) 2008 Wind River Systems, Inc.\n");
+
+        /* Only POLL mode supported so far */
+        edac_op_state = EDAC_OPSTATE_POLL;
+
+        val = pci_register_driver(&amd8111_edac_dev_driver);
+        val |= pci_register_driver(&amd8111_edac_pci_driver);
+
+        return val;
+}
+
+static void __exit amd8111_edac_exit(void)
+{
+        pci_unregister_driver(&amd8111_edac_pci_driver);
+        pci_unregister_driver(&amd8111_edac_dev_driver);
+}
+
+
+module_init(amd8111_edac_init);
+module_exit(amd8111_edac_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Cao Qingtao <qingtao.cao@windriver.com>\n");
+MODULE_DESCRIPTION("AMD8111 HyperTransport I/O Hub EDAC kernel module");