supports eg20t ptp clock

Supports EG20T ptp clock in the driver

Changes e-mail address.

Adds number.

Signed-off-by: Takahiro Shimizu <tshimizu818@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 744 insertions, 0 deletions

diff --git a/drivers/ptp/Kconfig b/drivers/ptp/Kconfig
index 68d720102296..cd9bc3b129bc 100644
--- a/drivers/ptp/Kconfig
+++ b/drivers/ptp/Kconfig
@@ -72,4 +72,17 @@ config DP83640_PHY
           In order for this to work, your MAC driver must also
           implement the skb_tx_timetamp() function.
 
+config PTP_1588_CLOCK_PCH
+        tristate "Intel PCH EG20T as PTP clock"
+        depends on PTP_1588_CLOCK
+        depends on PCH_GBE
+        help
+          This driver adds support for using the PCH EG20T as a PTP
+          clock. This clock is only useful if your PTP programs are
+          getting hardware time stamps on the PTP Ethernet packets
+          using the SO_TIMESTAMPING API.
+
+          To compile this driver as a module, choose M here: the module
+          will be called ptp_pch.
+
 endmenu
diff --git a/drivers/ptp/Makefile b/drivers/ptp/Makefile
index f6933e83de72..8b58597298de 100644
--- a/drivers/ptp/Makefile
+++ b/drivers/ptp/Makefile
@@ -5,3 +5,4 @@
 ptp-y                                   := ptp_clock.o ptp_chardev.o ptp_sysfs.o
 obj-$(CONFIG_PTP_1588_CLOCK)            += ptp.o
 obj-$(CONFIG_PTP_1588_CLOCK_IXP46X)     += ptp_ixp46x.o
+obj-$(CONFIG_PTP_1588_CLOCK_PCH)        += ptp_pch.o
diff --git a/drivers/ptp/ptp_pch.c b/drivers/ptp/ptp_pch.c
new file mode 100644
index 000000000000..0b38ee1b0f85
--- /dev/null
+++ b/drivers/ptp/ptp_pch.c
@@ -0,0 +1,730 @@
+/*
+ * PTP 1588 clock using the EG20T PCH
+ *
+ * Copyright (C) 2010 OMICRON electronics GmbH
+ * Copyright (C) 2011-2012 LAPIS SEMICONDUCTOR Co., LTD.
+ *
+ * This code was derived from the IXP46X driver.
+ *
+ * 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; version 2 of the License.
+ *
+ * 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/device.h>
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/ptp_clock_kernel.h>
+
+#define STATION_ADDR_LEN        20
+#define PCI_DEVICE_ID_PCH_1588  0x8819
+#define IO_MEM_BAR 1
+
+#define DEFAULT_ADDEND 0xA0000000
+#define TICKS_NS_SHIFT  5
+#define N_EXT_TS        2
+
+enum pch_status {
+        PCH_SUCCESS,
+        PCH_INVALIDPARAM,
+        PCH_NOTIMESTAMP,
+        PCH_INTERRUPTMODEINUSE,
+        PCH_FAILED,
+        PCH_UNSUPPORTED,
+};
+/**
+ * struct pch_ts_regs - IEEE 1588 registers
+ */
+struct pch_ts_regs {
+        u32 control;
+        u32 event;
+        u32 addend;
+        u32 accum;
+        u32 test;
+        u32 ts_compare;
+        u32 rsystime_lo;
+        u32 rsystime_hi;
+        u32 systime_lo;
+        u32 systime_hi;
+        u32 trgt_lo;
+        u32 trgt_hi;
+        u32 asms_lo;
+        u32 asms_hi;
+        u32 amms_lo;
+        u32 amms_hi;
+        u32 ch_control;
+        u32 ch_event;
+        u32 tx_snap_lo;
+        u32 tx_snap_hi;
+        u32 rx_snap_lo;
+        u32 rx_snap_hi;
+        u32 src_uuid_lo;
+        u32 src_uuid_hi;
+        u32 can_status;
+        u32 can_snap_lo;
+        u32 can_snap_hi;
+        u32 ts_sel;
+        u32 ts_st[6];
+        u32 reserve1[14];
+        u32 stl_max_set_en;
+        u32 stl_max_set;
+        u32 reserve2[13];
+        u32 srst;
+};
+
+#define PCH_TSC_RESET           (1 << 0)
+#define PCH_TSC_TTM_MASK        (1 << 1)
+#define PCH_TSC_ASMS_MASK       (1 << 2)
+#define PCH_TSC_AMMS_MASK       (1 << 3)
+#define PCH_TSC_PPSM_MASK       (1 << 4)
+#define PCH_TSE_TTIPEND         (1 << 1)
+#define PCH_TSE_SNS             (1 << 2)
+#define PCH_TSE_SNM             (1 << 3)
+#define PCH_TSE_PPS             (1 << 4)
+#define PCH_CC_MM               (1 << 0)
+#define PCH_CC_TA               (1 << 1)
+
+#define PCH_CC_MODE_SHIFT       16
+#define PCH_CC_MODE_MASK        0x001F0000
+#define PCH_CC_VERSION          (1 << 31)
+#define PCH_CE_TXS              (1 << 0)
+#define PCH_CE_RXS              (1 << 1)
+#define PCH_CE_OVR              (1 << 0)
+#define PCH_CE_VAL              (1 << 1)
+#define PCH_ECS_ETH             (1 << 0)
+
+#define PCH_ECS_CAN             (1 << 1)
+#define PCH_STATION_BYTES       6
+
+#define PCH_IEEE1588_ETH        (1 << 0)
+#define PCH_IEEE1588_CAN        (1 << 1)
+/**
+ * struct pch_dev - Driver private data
+ */
+struct pch_dev {
+        struct pch_ts_regs *regs;
+        struct ptp_clock *ptp_clock;
+        struct ptp_clock_info caps;
+        int exts0_enabled;
+        int exts1_enabled;
+
+        u32 mem_base;
+        u32 mem_size;
+        u32 irq;
+        struct pci_dev *pdev;
+        spinlock_t register_lock;
+};
+
+/**
+ * struct pch_params - 1588 module parameter
+ */
+struct pch_params {
+        u8 station[STATION_ADDR_LEN];
+};
+
+/* structure to hold the module parameters */
+static struct pch_params pch_param = {
+        "00:00:00:00:00:00"
+};
+
+/*
+ * Register access functions
+ */
+static inline void pch_eth_enable_set(struct pch_dev *chip)
+{
+        u32 val;
+        /* SET the eth_enable bit */
+        val = ioread32(&chip->regs->ts_sel) | (PCH_ECS_ETH);
+        iowrite32(val, (&chip->regs->ts_sel));
+}
+
+static u64 pch_systime_read(struct pch_ts_regs *regs)
+{
+        u64 ns;
+        u32 lo, hi;
+
+        lo = ioread32(&regs->systime_lo);
+        hi = ioread32(&regs->systime_hi);
+
+        ns = ((u64) hi) << 32;
+        ns |= lo;
+        ns <<= TICKS_NS_SHIFT;
+
+        return ns;
+}
+
+static void pch_systime_write(struct pch_ts_regs *regs, u64 ns)
+{
+        u32 hi, lo;
+
+        ns >>= TICKS_NS_SHIFT;
+        hi = ns >> 32;
+        lo = ns & 0xffffffff;
+
+        iowrite32(lo, &regs->systime_lo);
+        iowrite32(hi, &regs->systime_hi);
+}
+
+static inline void pch_block_reset(struct pch_dev *chip)
+{
+        u32 val;
+        /* Reset Hardware Assist block */
+        val = ioread32(&chip->regs->control) | PCH_TSC_RESET;
+        iowrite32(val, (&chip->regs->control));
+        val = val & ~PCH_TSC_RESET;
+        iowrite32(val, (&chip->regs->control));
+}
+
+u32 pch_ch_control_read(struct pci_dev *pdev)
+{
+        struct pch_dev *chip = pci_get_drvdata(pdev);
+        u32 val;
+
+        val = ioread32(&chip->regs->ch_control);
+
+        return val;
+}
+EXPORT_SYMBOL(pch_ch_control_read);
+
+void pch_ch_control_write(struct pci_dev *pdev, u32 val)
+{
+        struct pch_dev *chip = pci_get_drvdata(pdev);
+
+        iowrite32(val, (&chip->regs->ch_control));
+}
+EXPORT_SYMBOL(pch_ch_control_write);
+
+u32 pch_ch_event_read(struct pci_dev *pdev)
+{
+        struct pch_dev *chip = pci_get_drvdata(pdev);
+        u32 val;
+
+        val = ioread32(&chip->regs->ch_event);
+
+        return val;
+}
+EXPORT_SYMBOL(pch_ch_event_read);
+
+void pch_ch_event_write(struct pci_dev *pdev, u32 val)
+{
+        struct pch_dev *chip = pci_get_drvdata(pdev);
+
+        iowrite32(val, (&chip->regs->ch_event));
+}
+EXPORT_SYMBOL(pch_ch_event_write);
+
+u32 pch_src_uuid_lo_read(struct pci_dev *pdev)
+{
+        struct pch_dev *chip = pci_get_drvdata(pdev);
+        u32 val;
+
+        val = ioread32(&chip->regs->src_uuid_lo);
+
+        return val;
+}
+EXPORT_SYMBOL(pch_src_uuid_lo_read);
+
+u32 pch_src_uuid_hi_read(struct pci_dev *pdev)
+{
+        struct pch_dev *chip = pci_get_drvdata(pdev);
+        u32 val;
+
+        val = ioread32(&chip->regs->src_uuid_hi);
+
+        return val;
+}
+EXPORT_SYMBOL(pch_src_uuid_hi_read);
+
+u64 pch_rx_snap_read(struct pci_dev *pdev)
+{
+        struct pch_dev *chip = pci_get_drvdata(pdev);
+        u64 ns;
+        u32 lo, hi;
+
+        lo = ioread32(&chip->regs->rx_snap_lo);
+        hi = ioread32(&chip->regs->rx_snap_hi);
+
+        ns = ((u64) hi) << 32;
+        ns |= lo;
+
+        return ns;
+}
+EXPORT_SYMBOL(pch_rx_snap_read);
+
+u64 pch_tx_snap_read(struct pci_dev *pdev)
+{
+        struct pch_dev *chip = pci_get_drvdata(pdev);
+        u64 ns;
+        u32 lo, hi;
+
+        lo = ioread32(&chip->regs->tx_snap_lo);
+        hi = ioread32(&chip->regs->tx_snap_hi);
+
+        ns = ((u64) hi) << 32;
+        ns |= lo;
+
+        return ns;
+}
+EXPORT_SYMBOL(pch_tx_snap_read);
+
+/* This function enables all 64 bits in system time registers [high & low].
+This is a work-around for non continuous value in the SystemTime Register*/
+static void pch_set_system_time_count(struct pch_dev *chip)
+{
+        iowrite32(0x01, &chip->regs->stl_max_set_en);
+        iowrite32(0xFFFFFFFF, &chip->regs->stl_max_set);
+        iowrite32(0x00, &chip->regs->stl_max_set_en);
+}
+
+static void pch_reset(struct pch_dev *chip)
+{
+        /* Reset Hardware Assist */
+        pch_block_reset(chip);
+
+        /* enable all 32 bits in system time registers */
+        pch_set_system_time_count(chip);
+}
+
+/**
+ * pch_set_station_address() - This API sets the station address used by
+ *                                  IEEE 1588 hardware when looking at PTP
+ *                                  traffic on the  ethernet interface
+ * @addr:       dress which contain the column separated address to be used.
+ */
+static int pch_set_station_address(u8 *addr, struct pci_dev *pdev)
+{
+        s32 i;
+        struct pch_dev *chip = pci_get_drvdata(pdev);
+
+        /* Verify the parameter */
+        if ((chip->regs == 0) || addr == (u8 *)NULL) {
+                dev_err(&pdev->dev,
+                        "invalid params returning PCH_INVALIDPARAM\n");
+                return PCH_INVALIDPARAM;
+        }
+        /* For all station address bytes */
+        for (i = 0; i < PCH_STATION_BYTES; i++) {
+                u32 val;
+                s32 tmp;
+
+                tmp = hex_to_bin(addr[i * 3]);
+                if (tmp < 0) {
+                        dev_err(&pdev->dev,
+                                "invalid params returning PCH_INVALIDPARAM\n");
+                        return PCH_INVALIDPARAM;
+                }
+                val = tmp * 16;
+                tmp = hex_to_bin(addr[(i * 3) + 1]);
+                if (tmp < 0) {
+                        dev_err(&pdev->dev,
+                                "invalid params returning PCH_INVALIDPARAM\n");
+                        return PCH_INVALIDPARAM;
+                }
+                val += tmp;
+                /* Expects ':' separated addresses */
+                if ((i < 5) && (addr[(i * 3) + 2] != ':')) {
+                        dev_err(&pdev->dev,
+                                "invalid params returning PCH_INVALIDPARAM\n");
+                        return PCH_INVALIDPARAM;
+                }
+
+                /* Ideally we should set the address only after validating
+                                                         entire string */
+                dev_dbg(&pdev->dev, "invoking pch_station_set\n");
+                iowrite32(val, &chip->regs->ts_st[i]);
+        }
+        return 0;
+}
+
+/*
+ * Interrupt service routine
+ */
+static irqreturn_t isr(int irq, void *priv)
+{
+        struct pch_dev *pch_dev = priv;
+        struct pch_ts_regs *regs = pch_dev->regs;
+        struct ptp_clock_event event;
+        u32 ack = 0, lo, hi, val;
+
+        val = ioread32(&regs->event);
+
+        if (val & PCH_TSE_SNS) {
+                ack |= PCH_TSE_SNS;
+                if (pch_dev->exts0_enabled) {
+                        hi = ioread32(&regs->asms_hi);
+                        lo = ioread32(&regs->asms_lo);
+                        event.type = PTP_CLOCK_EXTTS;
+                        event.index = 0;
+                        event.timestamp = ((u64) hi) << 32;
+                        event.timestamp |= lo;
+                        event.timestamp <<= TICKS_NS_SHIFT;
+                        ptp_clock_event(pch_dev->ptp_clock, &event);
+                }
+        }
+
+        if (val & PCH_TSE_SNM) {
+                ack |= PCH_TSE_SNM;
+                if (pch_dev->exts1_enabled) {
+                        hi = ioread32(&regs->amms_hi);
+                        lo = ioread32(&regs->amms_lo);
+                        event.type = PTP_CLOCK_EXTTS;
+                        event.index = 1;
+                        event.timestamp = ((u64) hi) << 32;
+                        event.timestamp |= lo;
+                        event.timestamp <<= TICKS_NS_SHIFT;
+                        ptp_clock_event(pch_dev->ptp_clock, &event);
+                }
+        }
+
+        if (val & PCH_TSE_TTIPEND)
+                ack |= PCH_TSE_TTIPEND; /* this bit seems to be always set */
+
+        if (ack) {
+                iowrite32(ack, &regs->event);
+                return IRQ_HANDLED;
+        } else
+                return IRQ_NONE;
+}
+
+/*
+ * PTP clock operations
+ */
+
+static int ptp_pch_adjfreq(struct ptp_clock_info *ptp, s32 ppb)
+{
+        u64 adj;
+        u32 diff, addend;
+        int neg_adj = 0;
+        struct pch_dev *pch_dev = container_of(ptp, struct pch_dev, caps);
+        struct pch_ts_regs *regs = pch_dev->regs;
+
+        if (ppb < 0) {
+                neg_adj = 1;
+                ppb = -ppb;
+        }
+        addend = DEFAULT_ADDEND;
+        adj = addend;
+        adj *= ppb;
+        diff = div_u64(adj, 1000000000ULL);
+
+        addend = neg_adj ? addend - diff : addend + diff;
+
+        iowrite32(addend, &regs->addend);
+
+        return 0;
+}
+
+static int ptp_pch_adjtime(struct ptp_clock_info *ptp, s64 delta)
+{
+        s64 now;
+        unsigned long flags;
+        struct pch_dev *pch_dev = container_of(ptp, struct pch_dev, caps);
+        struct pch_ts_regs *regs = pch_dev->regs;
+
+        spin_lock_irqsave(&pch_dev->register_lock, flags);
+        now = pch_systime_read(regs);
+        now += delta;
+        pch_systime_write(regs, now);
+        spin_unlock_irqrestore(&pch_dev->register_lock, flags);
+
+        return 0;
+}
+
+static int ptp_pch_gettime(struct ptp_clock_info *ptp, struct timespec *ts)
+{
+        u64 ns;
+        u32 remainder;
+        unsigned long flags;
+        struct pch_dev *pch_dev = container_of(ptp, struct pch_dev, caps);
+        struct pch_ts_regs *regs = pch_dev->regs;
+
+        spin_lock_irqsave(&pch_dev->register_lock, flags);
+        ns = pch_systime_read(regs);
+        spin_unlock_irqrestore(&pch_dev->register_lock, flags);
+
+        ts->tv_sec = div_u64_rem(ns, 1000000000, &remainder);
+        ts->tv_nsec = remainder;
+        return 0;
+}
+
+static int ptp_pch_settime(struct ptp_clock_info *ptp,
+                           const struct timespec *ts)
+{
+        u64 ns;
+        unsigned long flags;
+        struct pch_dev *pch_dev = container_of(ptp, struct pch_dev, caps);
+        struct pch_ts_regs *regs = pch_dev->regs;
+
+        ns = ts->tv_sec * 1000000000ULL;
+        ns += ts->tv_nsec;
+
+        spin_lock_irqsave(&pch_dev->register_lock, flags);
+        pch_systime_write(regs, ns);
+        spin_unlock_irqrestore(&pch_dev->register_lock, flags);
+
+        return 0;
+}
+
+static int ptp_pch_enable(struct ptp_clock_info *ptp,
+                          struct ptp_clock_request *rq, int on)
+{
+        struct pch_dev *pch_dev = container_of(ptp, struct pch_dev, caps);
+
+        switch (rq->type) {
+        case PTP_CLK_REQ_EXTTS:
+                switch (rq->extts.index) {
+                case 0:
+                        pch_dev->exts0_enabled = on ? 1 : 0;
+                        break;
+                case 1:
+                        pch_dev->exts1_enabled = on ? 1 : 0;
+                        break;
+                default:
+                        return -EINVAL;
+                }
+                return 0;
+        default:
+                break;
+        }
+
+        return -EOPNOTSUPP;
+}
+
+static struct ptp_clock_info ptp_pch_caps = {
+        .owner          = THIS_MODULE,
+        .name           = "PCH timer",
+        .max_adj        = 50000000,
+        .n_ext_ts       = N_EXT_TS,
+        .pps            = 0,
+        .adjfreq        = ptp_pch_adjfreq,
+        .adjtime        = ptp_pch_adjtime,
+        .gettime        = ptp_pch_gettime,
+        .settime        = ptp_pch_settime,
+        .enable         = ptp_pch_enable,
+};
+
+
+#ifdef CONFIG_PM
+static s32 pch_suspend(struct pci_dev *pdev, pm_message_t state)
+{
+        pci_disable_device(pdev);
+        pci_enable_wake(pdev, PCI_D3hot, 0);
+
+        if (pci_save_state(pdev) != 0) {
+                dev_err(&pdev->dev, "could not save PCI config state\n");
+                return -ENOMEM;
+        }
+        pci_set_power_state(pdev, pci_choose_state(pdev, state));
+
+        return 0;
+}
+
+static s32 pch_resume(struct pci_dev *pdev)
+{
+        s32 ret;
+
+        pci_set_power_state(pdev, PCI_D0);
+        pci_restore_state(pdev);
+        ret = pci_enable_device(pdev);
+        if (ret) {
+                dev_err(&pdev->dev, "pci_enable_device failed\n");
+                return ret;
+        }
+        pci_enable_wake(pdev, PCI_D3hot, 0);
+        return 0;
+}
+#else
+#define pch_suspend NULL
+#define pch_resume NULL
+#endif
+
+static void __devexit pch_remove(struct pci_dev *pdev)
+{
+        struct pch_dev *chip = pci_get_drvdata(pdev);
+
+        ptp_clock_unregister(chip->ptp_clock);
+        /* free the interrupt */
+        if (pdev->irq != 0)
+                free_irq(pdev->irq, chip);
+
+        /* unmap the virtual IO memory space */
+        if (chip->regs != 0) {
+                iounmap(chip->regs);
+                chip->regs = 0;
+        }
+        /* release the reserved IO memory space */
+        if (chip->mem_base != 0) {
+                release_mem_region(chip->mem_base, chip->mem_size);
+                chip->mem_base = 0;
+        }
+        pci_disable_device(pdev);
+        kfree(chip);
+        dev_info(&pdev->dev, "complete\n");
+}
+
+static s32 __devinit
+pch_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+        s32 ret;
+        unsigned long flags;
+        struct pch_dev *chip;
+
+        chip = kzalloc(sizeof(struct pch_dev), GFP_KERNEL);
+        if (chip == NULL)
+                return -ENOMEM;
+
+        /* enable the 1588 pci device */
+        ret = pci_enable_device(pdev);
+        if (ret != 0) {
+                dev_err(&pdev->dev, "could not enable the pci device\n");
+                goto err_pci_en;
+        }
+
+        chip->mem_base = pci_resource_start(pdev, IO_MEM_BAR);
+        if (!chip->mem_base) {
+                dev_err(&pdev->dev, "could not locate IO memory address\n");
+                ret = -ENODEV;
+                goto err_pci_start;
+        }
+
+        /* retrieve the available length of the IO memory space */
+        chip->mem_size = pci_resource_len(pdev, IO_MEM_BAR);
+
+        /* allocate the memory for the device registers */
+        if (!request_mem_region(chip->mem_base, chip->mem_size, "1588_regs")) {
+                dev_err(&pdev->dev,
+                        "could not allocate register memory space\n");
+                ret = -EBUSY;
+                goto err_req_mem_region;
+        }
+
+        /* get the virtual address to the 1588 registers */
+        chip->regs = ioremap(chip->mem_base, chip->mem_size);
+
+        if (!chip->regs) {
+                dev_err(&pdev->dev, "Could not get virtual address\n");
+                ret = -ENOMEM;
+                goto err_ioremap;
+        }
+
+        chip->caps = ptp_pch_caps;
+        chip->ptp_clock = ptp_clock_register(&chip->caps);
+
+        if (IS_ERR(chip->ptp_clock))
+                return PTR_ERR(chip->ptp_clock);
+
+        spin_lock_init(&chip->register_lock);
+
+        ret = request_irq(pdev->irq, &isr, IRQF_SHARED, KBUILD_MODNAME, chip);
+        if (ret != 0) {
+                dev_err(&pdev->dev, "failed to get irq %d\n", pdev->irq);
+                goto err_req_irq;
+        }
+
+        /* indicate success */
+        chip->irq = pdev->irq;
+        chip->pdev = pdev;
+        pci_set_drvdata(pdev, chip);
+
+        spin_lock_irqsave(&chip->register_lock, flags);
+        /* reset the ieee1588 h/w */
+        pch_reset(chip);
+
+        iowrite32(DEFAULT_ADDEND, &chip->regs->addend);
+        iowrite32(1, &chip->regs->trgt_lo);
+        iowrite32(0, &chip->regs->trgt_hi);
+        iowrite32(PCH_TSE_TTIPEND, &chip->regs->event);
+        /* Version: IEEE1588 v1 and IEEE1588-2008,  Mode: All Evwnt, Locked  */
+        iowrite32(0x80020000, &chip->regs->ch_control);
+
+        pch_eth_enable_set(chip);
+
+        if (strcmp(pch_param.station, "00:00:00:00:00:00") != 0) {
+                if (pch_set_station_address(pch_param.station, pdev) != 0) {
+                        dev_err(&pdev->dev,
+                        "Invalid station address parameter\n"
+                        "Module loaded but station address not set correctly\n"
+                        );
+                }
+        }
+        spin_unlock_irqrestore(&chip->register_lock, flags);
+        return 0;
+
+err_req_irq:
+        ptp_clock_unregister(chip->ptp_clock);
+        iounmap(chip->regs);
+        chip->regs = 0;
+
+err_ioremap:
+        release_mem_region(chip->mem_base, chip->mem_size);
+
+err_req_mem_region:
+        chip->mem_base = 0;
+
+err_pci_start:
+        pci_disable_device(pdev);
+
+err_pci_en:
+        kfree(chip);
+        dev_err(&pdev->dev, "probe failed(ret=0x%x)\n", ret);
+
+        return ret;
+}
+
+static DEFINE_PCI_DEVICE_TABLE(pch_ieee1588_pcidev_id) = {
+        {
+          .vendor = PCI_VENDOR_ID_INTEL,
+          .device = PCI_DEVICE_ID_PCH_1588
+         },
+        {0}
+};
+
+static struct pci_driver pch_pcidev = {
+        .name = KBUILD_MODNAME,
+        .id_table = pch_ieee1588_pcidev_id,
+        .probe = pch_probe,
+        .remove = pch_remove,
+        .suspend = pch_suspend,
+        .resume = pch_resume,
+};
+
+static void __exit ptp_pch_exit(void)
+{
+        pci_unregister_driver(&pch_pcidev);
+}
+
+static s32 __init ptp_pch_init(void)
+{
+        s32 ret;
+
+        /* register the driver with the pci core */
+        ret = pci_register_driver(&pch_pcidev);
+
+        return ret;
+}
+
+module_init(ptp_pch_init);
+module_exit(ptp_pch_exit);
+
+module_param_string(station, pch_param.station, sizeof pch_param.station, 0444);
+MODULE_PARM_DESC(station,
+         "IEEE 1588 station address to use - column separated hex values");
+
+MODULE_AUTHOR("LAPIS SEMICONDUCTOR, <tshimizu818@gmail.com>");
+MODULE_DESCRIPTION("PTP clock using the EG20T timer");
+MODULE_LICENSE("GPL");