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-rw-r--r--drivers/ptp/Kconfig14
-rw-r--r--drivers/ptp/Makefile1
-rw-r--r--drivers/ptp/ptp_pch.c7
-rw-r--r--drivers/ptp/ptp_qoriq.c454
4 files changed, 464 insertions, 12 deletions
diff --git a/drivers/ptp/Kconfig b/drivers/ptp/Kconfig
index a21ad10d613c..474c988d2e95 100644
--- a/drivers/ptp/Kconfig
+++ b/drivers/ptp/Kconfig
@@ -41,19 +41,19 @@ config PTP_1588_CLOCK_DTE
To compile this driver as a module, choose M here: the module
will be called ptp_dte.
-config PTP_1588_CLOCK_GIANFAR
- tristate "Freescale eTSEC as PTP clock"
+config PTP_1588_CLOCK_QORIQ
+ tristate "Freescale QorIQ 1588 timer as PTP clock"
depends on GIANFAR
depends on PTP_1588_CLOCK
default y
help
- This driver adds support for using the eTSEC 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.
+ This driver adds support for using the Freescale QorIQ 1588
+ timer 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 gianfar_ptp.
+ will be called ptp_qoriq.
config PTP_1588_CLOCK_IXP46X
tristate "Intel IXP46x as PTP clock"
diff --git a/drivers/ptp/Makefile b/drivers/ptp/Makefile
index fd28207f5379..19efa9cfa950 100644
--- a/drivers/ptp/Makefile
+++ b/drivers/ptp/Makefile
@@ -9,3 +9,4 @@ obj-$(CONFIG_PTP_1588_CLOCK_DTE) += ptp_dte.o
obj-$(CONFIG_PTP_1588_CLOCK_IXP46X) += ptp_ixp46x.o
obj-$(CONFIG_PTP_1588_CLOCK_PCH) += ptp_pch.o
obj-$(CONFIG_PTP_1588_CLOCK_KVM) += ptp_kvm.o
+obj-$(CONFIG_PTP_1588_CLOCK_QORIQ) += ptp_qoriq.o
diff --git a/drivers/ptp/ptp_pch.c b/drivers/ptp/ptp_pch.c
index b3285175f20f..78ccf936d356 100644
--- a/drivers/ptp/ptp_pch.c
+++ b/drivers/ptp/ptp_pch.c
@@ -452,7 +452,6 @@ static int ptp_pch_adjtime(struct ptp_clock_info *ptp, s64 delta)
static int ptp_pch_gettime(struct ptp_clock_info *ptp, struct timespec64 *ts)
{
u64 ns;
- u32 remainder;
unsigned long flags;
struct pch_dev *pch_dev = container_of(ptp, struct pch_dev, caps);
struct pch_ts_regs __iomem *regs = pch_dev->regs;
@@ -461,8 +460,7 @@ static int ptp_pch_gettime(struct ptp_clock_info *ptp, struct timespec64 *ts)
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;
+ *ts = ns_to_timespec64(ns);
return 0;
}
@@ -474,8 +472,7 @@ static int ptp_pch_settime(struct ptp_clock_info *ptp,
struct pch_dev *pch_dev = container_of(ptp, struct pch_dev, caps);
struct pch_ts_regs __iomem *regs = pch_dev->regs;
- ns = ts->tv_sec * 1000000000ULL;
- ns += ts->tv_nsec;
+ ns = timespec64_to_ns(ts);
spin_lock_irqsave(&pch_dev->register_lock, flags);
pch_systime_write(regs, ns);
diff --git a/drivers/ptp/ptp_qoriq.c b/drivers/ptp/ptp_qoriq.c
new file mode 100644
index 000000000000..1468a1642b49
--- /dev/null
+++ b/drivers/ptp/ptp_qoriq.c
@@ -0,0 +1,454 @@
+/*
+ * PTP 1588 clock for Freescale QorIQ 1588 timer
+ *
+ * Copyright (C) 2010 OMICRON electronics GmbH
+ *
+ * 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 of the License, 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; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/device.h>
+#include <linux/hrtimer.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/timex.h>
+#include <linux/slab.h>
+
+#include <linux/fsl/ptp_qoriq.h>
+
+/*
+ * Register access functions
+ */
+
+/* Caller must hold qoriq_ptp->lock. */
+static u64 tmr_cnt_read(struct qoriq_ptp *qoriq_ptp)
+{
+ u64 ns;
+ u32 lo, hi;
+
+ lo = qoriq_read(&qoriq_ptp->regs->tmr_cnt_l);
+ hi = qoriq_read(&qoriq_ptp->regs->tmr_cnt_h);
+ ns = ((u64) hi) << 32;
+ ns |= lo;
+ return ns;
+}
+
+/* Caller must hold qoriq_ptp->lock. */
+static void tmr_cnt_write(struct qoriq_ptp *qoriq_ptp, u64 ns)
+{
+ u32 hi = ns >> 32;
+ u32 lo = ns & 0xffffffff;
+
+ qoriq_write(&qoriq_ptp->regs->tmr_cnt_l, lo);
+ qoriq_write(&qoriq_ptp->regs->tmr_cnt_h, hi);
+}
+
+/* Caller must hold qoriq_ptp->lock. */
+static void set_alarm(struct qoriq_ptp *qoriq_ptp)
+{
+ u64 ns;
+ u32 lo, hi;
+
+ ns = tmr_cnt_read(qoriq_ptp) + 1500000000ULL;
+ ns = div_u64(ns, 1000000000UL) * 1000000000ULL;
+ ns -= qoriq_ptp->tclk_period;
+ hi = ns >> 32;
+ lo = ns & 0xffffffff;
+ qoriq_write(&qoriq_ptp->regs->tmr_alarm1_l, lo);
+ qoriq_write(&qoriq_ptp->regs->tmr_alarm1_h, hi);
+}
+
+/* Caller must hold qoriq_ptp->lock. */
+static void set_fipers(struct qoriq_ptp *qoriq_ptp)
+{
+ set_alarm(qoriq_ptp);
+ qoriq_write(&qoriq_ptp->regs->tmr_fiper1, qoriq_ptp->tmr_fiper1);
+ qoriq_write(&qoriq_ptp->regs->tmr_fiper2, qoriq_ptp->tmr_fiper2);
+}
+
+/*
+ * Interrupt service routine
+ */
+
+static irqreturn_t isr(int irq, void *priv)
+{
+ struct qoriq_ptp *qoriq_ptp = priv;
+ struct ptp_clock_event event;
+ u64 ns;
+ u32 ack = 0, lo, hi, mask, val;
+
+ val = qoriq_read(&qoriq_ptp->regs->tmr_tevent);
+
+ if (val & ETS1) {
+ ack |= ETS1;
+ hi = qoriq_read(&qoriq_ptp->regs->tmr_etts1_h);
+ lo = qoriq_read(&qoriq_ptp->regs->tmr_etts1_l);
+ event.type = PTP_CLOCK_EXTTS;
+ event.index = 0;
+ event.timestamp = ((u64) hi) << 32;
+ event.timestamp |= lo;
+ ptp_clock_event(qoriq_ptp->clock, &event);
+ }
+
+ if (val & ETS2) {
+ ack |= ETS2;
+ hi = qoriq_read(&qoriq_ptp->regs->tmr_etts2_h);
+ lo = qoriq_read(&qoriq_ptp->regs->tmr_etts2_l);
+ event.type = PTP_CLOCK_EXTTS;
+ event.index = 1;
+ event.timestamp = ((u64) hi) << 32;
+ event.timestamp |= lo;
+ ptp_clock_event(qoriq_ptp->clock, &event);
+ }
+
+ if (val & ALM2) {
+ ack |= ALM2;
+ if (qoriq_ptp->alarm_value) {
+ event.type = PTP_CLOCK_ALARM;
+ event.index = 0;
+ event.timestamp = qoriq_ptp->alarm_value;
+ ptp_clock_event(qoriq_ptp->clock, &event);
+ }
+ if (qoriq_ptp->alarm_interval) {
+ ns = qoriq_ptp->alarm_value + qoriq_ptp->alarm_interval;
+ hi = ns >> 32;
+ lo = ns & 0xffffffff;
+ spin_lock(&qoriq_ptp->lock);
+ qoriq_write(&qoriq_ptp->regs->tmr_alarm2_l, lo);
+ qoriq_write(&qoriq_ptp->regs->tmr_alarm2_h, hi);
+ spin_unlock(&qoriq_ptp->lock);
+ qoriq_ptp->alarm_value = ns;
+ } else {
+ qoriq_write(&qoriq_ptp->regs->tmr_tevent, ALM2);
+ spin_lock(&qoriq_ptp->lock);
+ mask = qoriq_read(&qoriq_ptp->regs->tmr_temask);
+ mask &= ~ALM2EN;
+ qoriq_write(&qoriq_ptp->regs->tmr_temask, mask);
+ spin_unlock(&qoriq_ptp->lock);
+ qoriq_ptp->alarm_value = 0;
+ qoriq_ptp->alarm_interval = 0;
+ }
+ }
+
+ if (val & PP1) {
+ ack |= PP1;
+ event.type = PTP_CLOCK_PPS;
+ ptp_clock_event(qoriq_ptp->clock, &event);
+ }
+
+ if (ack) {
+ qoriq_write(&qoriq_ptp->regs->tmr_tevent, ack);
+ return IRQ_HANDLED;
+ } else
+ return IRQ_NONE;
+}
+
+/*
+ * PTP clock operations
+ */
+
+static int ptp_qoriq_adjfine(struct ptp_clock_info *ptp, long scaled_ppm)
+{
+ u64 adj, diff;
+ u32 tmr_add;
+ int neg_adj = 0;
+ struct qoriq_ptp *qoriq_ptp = container_of(ptp, struct qoriq_ptp, caps);
+
+ if (scaled_ppm < 0) {
+ neg_adj = 1;
+ scaled_ppm = -scaled_ppm;
+ }
+ tmr_add = qoriq_ptp->tmr_add;
+ adj = tmr_add;
+
+ /* calculate diff as adj*(scaled_ppm/65536)/1000000
+ * and round() to the nearest integer
+ */
+ adj *= scaled_ppm;
+ diff = div_u64(adj, 8000000);
+ diff = (diff >> 13) + ((diff >> 12) & 1);
+
+ tmr_add = neg_adj ? tmr_add - diff : tmr_add + diff;
+
+ qoriq_write(&qoriq_ptp->regs->tmr_add, tmr_add);
+
+ return 0;
+}
+
+static int ptp_qoriq_adjtime(struct ptp_clock_info *ptp, s64 delta)
+{
+ s64 now;
+ unsigned long flags;
+ struct qoriq_ptp *qoriq_ptp = container_of(ptp, struct qoriq_ptp, caps);
+
+ spin_lock_irqsave(&qoriq_ptp->lock, flags);
+
+ now = tmr_cnt_read(qoriq_ptp);
+ now += delta;
+ tmr_cnt_write(qoriq_ptp, now);
+ set_fipers(qoriq_ptp);
+
+ spin_unlock_irqrestore(&qoriq_ptp->lock, flags);
+
+ return 0;
+}
+
+static int ptp_qoriq_gettime(struct ptp_clock_info *ptp,
+ struct timespec64 *ts)
+{
+ u64 ns;
+ unsigned long flags;
+ struct qoriq_ptp *qoriq_ptp = container_of(ptp, struct qoriq_ptp, caps);
+
+ spin_lock_irqsave(&qoriq_ptp->lock, flags);
+
+ ns = tmr_cnt_read(qoriq_ptp);
+
+ spin_unlock_irqrestore(&qoriq_ptp->lock, flags);
+
+ *ts = ns_to_timespec64(ns);
+
+ return 0;
+}
+
+static int ptp_qoriq_settime(struct ptp_clock_info *ptp,
+ const struct timespec64 *ts)
+{
+ u64 ns;
+ unsigned long flags;
+ struct qoriq_ptp *qoriq_ptp = container_of(ptp, struct qoriq_ptp, caps);
+
+ ns = timespec64_to_ns(ts);
+
+ spin_lock_irqsave(&qoriq_ptp->lock, flags);
+
+ tmr_cnt_write(qoriq_ptp, ns);
+ set_fipers(qoriq_ptp);
+
+ spin_unlock_irqrestore(&qoriq_ptp->lock, flags);
+
+ return 0;
+}
+
+static int ptp_qoriq_enable(struct ptp_clock_info *ptp,
+ struct ptp_clock_request *rq, int on)
+{
+ struct qoriq_ptp *qoriq_ptp = container_of(ptp, struct qoriq_ptp, caps);
+ unsigned long flags;
+ u32 bit, mask;
+
+ switch (rq->type) {
+ case PTP_CLK_REQ_EXTTS:
+ switch (rq->extts.index) {
+ case 0:
+ bit = ETS1EN;
+ break;
+ case 1:
+ bit = ETS2EN;
+ break;
+ default:
+ return -EINVAL;
+ }
+ spin_lock_irqsave(&qoriq_ptp->lock, flags);
+ mask = qoriq_read(&qoriq_ptp->regs->tmr_temask);
+ if (on)
+ mask |= bit;
+ else
+ mask &= ~bit;
+ qoriq_write(&qoriq_ptp->regs->tmr_temask, mask);
+ spin_unlock_irqrestore(&qoriq_ptp->lock, flags);
+ return 0;
+
+ case PTP_CLK_REQ_PPS:
+ spin_lock_irqsave(&qoriq_ptp->lock, flags);
+ mask = qoriq_read(&qoriq_ptp->regs->tmr_temask);
+ if (on)
+ mask |= PP1EN;
+ else
+ mask &= ~PP1EN;
+ qoriq_write(&qoriq_ptp->regs->tmr_temask, mask);
+ spin_unlock_irqrestore(&qoriq_ptp->lock, flags);
+ return 0;
+
+ default:
+ break;
+ }
+
+ return -EOPNOTSUPP;
+}
+
+static const struct ptp_clock_info ptp_qoriq_caps = {
+ .owner = THIS_MODULE,
+ .name = "qoriq ptp clock",
+ .max_adj = 512000,
+ .n_alarm = 0,
+ .n_ext_ts = N_EXT_TS,
+ .n_per_out = 0,
+ .n_pins = 0,
+ .pps = 1,
+ .adjfine = ptp_qoriq_adjfine,
+ .adjtime = ptp_qoriq_adjtime,
+ .gettime64 = ptp_qoriq_gettime,
+ .settime64 = ptp_qoriq_settime,
+ .enable = ptp_qoriq_enable,
+};
+
+static int qoriq_ptp_probe(struct platform_device *dev)
+{
+ struct device_node *node = dev->dev.of_node;
+ struct qoriq_ptp *qoriq_ptp;
+ struct timespec64 now;
+ int err = -ENOMEM;
+ u32 tmr_ctrl;
+ unsigned long flags;
+
+ qoriq_ptp = kzalloc(sizeof(*qoriq_ptp), GFP_KERNEL);
+ if (!qoriq_ptp)
+ goto no_memory;
+
+ err = -ENODEV;
+
+ qoriq_ptp->caps = ptp_qoriq_caps;
+
+ if (of_property_read_u32(node, "fsl,cksel", &qoriq_ptp->cksel))
+ qoriq_ptp->cksel = DEFAULT_CKSEL;
+
+ if (of_property_read_u32(node,
+ "fsl,tclk-period", &qoriq_ptp->tclk_period) ||
+ of_property_read_u32(node,
+ "fsl,tmr-prsc", &qoriq_ptp->tmr_prsc) ||
+ of_property_read_u32(node,
+ "fsl,tmr-add", &qoriq_ptp->tmr_add) ||
+ of_property_read_u32(node,
+ "fsl,tmr-fiper1", &qoriq_ptp->tmr_fiper1) ||
+ of_property_read_u32(node,
+ "fsl,tmr-fiper2", &qoriq_ptp->tmr_fiper2) ||
+ of_property_read_u32(node,
+ "fsl,max-adj", &qoriq_ptp->caps.max_adj)) {
+ pr_err("device tree node missing required elements\n");
+ goto no_node;
+ }
+
+ qoriq_ptp->irq = platform_get_irq(dev, 0);
+
+ if (qoriq_ptp->irq < 0) {
+ pr_err("irq not in device tree\n");
+ goto no_node;
+ }
+ if (request_irq(qoriq_ptp->irq, isr, 0, DRIVER, qoriq_ptp)) {
+ pr_err("request_irq failed\n");
+ goto no_node;
+ }
+
+ qoriq_ptp->rsrc = platform_get_resource(dev, IORESOURCE_MEM, 0);
+ if (!qoriq_ptp->rsrc) {
+ pr_err("no resource\n");
+ goto no_resource;
+ }
+ if (request_resource(&iomem_resource, qoriq_ptp->rsrc)) {
+ pr_err("resource busy\n");
+ goto no_resource;
+ }
+
+ spin_lock_init(&qoriq_ptp->lock);
+
+ qoriq_ptp->regs = ioremap(qoriq_ptp->rsrc->start,
+ resource_size(qoriq_ptp->rsrc));
+ if (!qoriq_ptp->regs) {
+ pr_err("ioremap ptp registers failed\n");
+ goto no_ioremap;
+ }
+ getnstimeofday64(&now);
+ ptp_qoriq_settime(&qoriq_ptp->caps, &now);
+
+ tmr_ctrl =
+ (qoriq_ptp->tclk_period & TCLK_PERIOD_MASK) << TCLK_PERIOD_SHIFT |
+ (qoriq_ptp->cksel & CKSEL_MASK) << CKSEL_SHIFT;
+
+ spin_lock_irqsave(&qoriq_ptp->lock, flags);
+
+ qoriq_write(&qoriq_ptp->regs->tmr_ctrl, tmr_ctrl);
+ qoriq_write(&qoriq_ptp->regs->tmr_add, qoriq_ptp->tmr_add);
+ qoriq_write(&qoriq_ptp->regs->tmr_prsc, qoriq_ptp->tmr_prsc);
+ qoriq_write(&qoriq_ptp->regs->tmr_fiper1, qoriq_ptp->tmr_fiper1);
+ qoriq_write(&qoriq_ptp->regs->tmr_fiper2, qoriq_ptp->tmr_fiper2);
+ set_alarm(qoriq_ptp);
+ qoriq_write(&qoriq_ptp->regs->tmr_ctrl, tmr_ctrl|FIPERST|RTPE|TE|FRD);
+
+ spin_unlock_irqrestore(&qoriq_ptp->lock, flags);
+
+ qoriq_ptp->clock = ptp_clock_register(&qoriq_ptp->caps, &dev->dev);
+ if (IS_ERR(qoriq_ptp->clock)) {
+ err = PTR_ERR(qoriq_ptp->clock);
+ goto no_clock;
+ }
+ qoriq_ptp->phc_index = ptp_clock_index(qoriq_ptp->clock);
+
+ platform_set_drvdata(dev, qoriq_ptp);
+
+ return 0;
+
+no_clock:
+ iounmap(qoriq_ptp->regs);
+no_ioremap:
+ release_resource(qoriq_ptp->rsrc);
+no_resource:
+ free_irq(qoriq_ptp->irq, qoriq_ptp);
+no_node:
+ kfree(qoriq_ptp);
+no_memory:
+ return err;
+}
+
+static int qoriq_ptp_remove(struct platform_device *dev)
+{
+ struct qoriq_ptp *qoriq_ptp = platform_get_drvdata(dev);
+
+ qoriq_write(&qoriq_ptp->regs->tmr_temask, 0);
+ qoriq_write(&qoriq_ptp->regs->tmr_ctrl, 0);
+
+ ptp_clock_unregister(qoriq_ptp->clock);
+ iounmap(qoriq_ptp->regs);
+ release_resource(qoriq_ptp->rsrc);
+ free_irq(qoriq_ptp->irq, qoriq_ptp);
+ kfree(qoriq_ptp);
+
+ return 0;
+}
+
+static const struct of_device_id match_table[] = {
+ { .compatible = "fsl,etsec-ptp" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, match_table);
+
+static struct platform_driver qoriq_ptp_driver = {
+ .driver = {
+ .name = "ptp_qoriq",
+ .of_match_table = match_table,
+ },
+ .probe = qoriq_ptp_probe,
+ .remove = qoriq_ptp_remove,
+};
+
+module_platform_driver(qoriq_ptp_driver);
+
+MODULE_AUTHOR("Richard Cochran <richardcochran@gmail.com>");
+MODULE_DESCRIPTION("PTP clock for Freescale QorIQ 1588 timer");
+MODULE_LICENSE("GPL");