+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0-or-later */
-/*
- * PTP 1588 clock using the IXP46X
- *
- * Copyright (C) 2010 OMICRON electronics GmbH
- */
-
-#ifndef _IXP46X_TS_H_
-#define _IXP46X_TS_H_
-
-#define DEFAULT_ADDEND 0xF0000029
-#define TICKS_NS_SHIFT 4
-
-struct ixp46x_channel_ctl {
- u32 ch_control; /* 0x40 Time Synchronization Channel Control */
- u32 ch_event; /* 0x44 Time Synchronization Channel Event */
- u32 tx_snap_lo; /* 0x48 Transmit Snapshot Low Register */
- u32 tx_snap_hi; /* 0x4C Transmit Snapshot High Register */
- u32 rx_snap_lo; /* 0x50 Receive Snapshot Low Register */
- u32 rx_snap_hi; /* 0x54 Receive Snapshot High Register */
- u32 src_uuid_lo; /* 0x58 Source UUID0 Low Register */
- u32 src_uuid_hi; /* 0x5C Sequence Identifier/Source UUID0 High */
-};
-
-struct ixp46x_ts_regs {
- u32 control; /* 0x00 Time Sync Control Register */
- u32 event; /* 0x04 Time Sync Event Register */
- u32 addend; /* 0x08 Time Sync Addend Register */
- u32 accum; /* 0x0C Time Sync Accumulator Register */
- u32 test; /* 0x10 Time Sync Test Register */
- u32 unused; /* 0x14 */
- u32 rsystime_lo; /* 0x18 RawSystemTime_Low Register */
- u32 rsystime_hi; /* 0x1C RawSystemTime_High Register */
- u32 systime_lo; /* 0x20 SystemTime_Low Register */
- u32 systime_hi; /* 0x24 SystemTime_High Register */
- u32 trgt_lo; /* 0x28 TargetTime_Low Register */
- u32 trgt_hi; /* 0x2C TargetTime_High Register */
- u32 asms_lo; /* 0x30 Auxiliary Slave Mode Snapshot Low */
- u32 asms_hi; /* 0x34 Auxiliary Slave Mode Snapshot High */
- u32 amms_lo; /* 0x38 Auxiliary Master Mode Snapshot Low */
- u32 amms_hi; /* 0x3C Auxiliary Master Mode Snapshot High */
-
- struct ixp46x_channel_ctl channel[3];
-};
-
-/* 0x00 Time Sync Control Register Bits */
-#define TSCR_AMM (1<<3)
-#define TSCR_ASM (1<<2)
-#define TSCR_TTM (1<<1)
-#define TSCR_RST (1<<0)
-
-/* 0x04 Time Sync Event Register Bits */
-#define TSER_SNM (1<<3)
-#define TSER_SNS (1<<2)
-#define TTIPEND (1<<1)
-
-/* 0x40 Time Synchronization Channel Control Register Bits */
-#define MASTER_MODE (1<<0)
-#define TIMESTAMP_ALL (1<<1)
-
-/* 0x44 Time Synchronization Channel Event Register Bits */
-#define TX_SNAPSHOT_LOCKED (1<<0)
-#define RX_SNAPSHOT_LOCKED (1<<1)
-
-/* The ptp_ixp46x module will set this variable */
-extern int ixp46x_phc_index;
-
-#endif
Say Y here if you want to use built-in Ethernet ports
on IXP4xx processor.
+config PTP_1588_CLOCK_IXP46X
+ tristate "Intel IXP46x as PTP clock"
+ depends on IXP4XX_ETH
+ depends on PTP_1588_CLOCK
+ default y
+ help
+ This driver adds support for using the IXP46X 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_ixp46x.
+
endif # NET_VENDOR_XSCALE
# Makefile for the Intel XScale IXP device drivers.
#
-obj-$(CONFIG_IXP4XX_ETH) += ixp4xx_eth.o
+obj-$(CONFIG_IXP4XX_ETH) += ixp4xx_eth.o
+obj-$(CONFIG_PTP_1588_CLOCK_IXP46X) += ptp_ixp46x.o
#include <linux/ptp_classify.h>
#include <linux/slab.h>
#include <linux/module.h>
-#include <mach/ixp46x_ts.h>
#include <linux/soc/ixp4xx/npe.h>
#include <linux/soc/ixp4xx/qmgr.h>
+#include "ixp46x_ts.h"
+
#define DEBUG_DESC 0
#define DEBUG_RX 0
#define DEBUG_TX 0
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * PTP 1588 clock using the IXP46X
+ *
+ * Copyright (C) 2010 OMICRON electronics GmbH
+ */
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/gpio.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/ptp_clock_kernel.h>
+
+#include "ixp46x_ts.h"
+
+#define DRIVER "ptp_ixp46x"
+#define N_EXT_TS 2
+#define MASTER_GPIO 8
+#define MASTER_IRQ 25
+#define SLAVE_GPIO 7
+#define SLAVE_IRQ 24
+
+struct ixp_clock {
+ struct ixp46x_ts_regs *regs;
+ struct ptp_clock *ptp_clock;
+ struct ptp_clock_info caps;
+ int exts0_enabled;
+ int exts1_enabled;
+};
+
+DEFINE_SPINLOCK(register_lock);
+
+/*
+ * Register access functions
+ */
+
+static u64 ixp_systime_read(struct ixp46x_ts_regs *regs)
+{
+ u64 ns;
+ u32 lo, hi;
+
+ lo = __raw_readl(®s->systime_lo);
+ hi = __raw_readl(®s->systime_hi);
+
+ ns = ((u64) hi) << 32;
+ ns |= lo;
+ ns <<= TICKS_NS_SHIFT;
+
+ return ns;
+}
+
+static void ixp_systime_write(struct ixp46x_ts_regs *regs, u64 ns)
+{
+ u32 hi, lo;
+
+ ns >>= TICKS_NS_SHIFT;
+ hi = ns >> 32;
+ lo = ns & 0xffffffff;
+
+ __raw_writel(lo, ®s->systime_lo);
+ __raw_writel(hi, ®s->systime_hi);
+}
+
+/*
+ * Interrupt service routine
+ */
+
+static irqreturn_t isr(int irq, void *priv)
+{
+ struct ixp_clock *ixp_clock = priv;
+ struct ixp46x_ts_regs *regs = ixp_clock->regs;
+ struct ptp_clock_event event;
+ u32 ack = 0, lo, hi, val;
+
+ val = __raw_readl(®s->event);
+
+ if (val & TSER_SNS) {
+ ack |= TSER_SNS;
+ if (ixp_clock->exts0_enabled) {
+ hi = __raw_readl(®s->asms_hi);
+ lo = __raw_readl(®s->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(ixp_clock->ptp_clock, &event);
+ }
+ }
+
+ if (val & TSER_SNM) {
+ ack |= TSER_SNM;
+ if (ixp_clock->exts1_enabled) {
+ hi = __raw_readl(®s->amms_hi);
+ lo = __raw_readl(®s->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(ixp_clock->ptp_clock, &event);
+ }
+ }
+
+ if (val & TTIPEND)
+ ack |= TTIPEND; /* this bit seems to be always set */
+
+ if (ack) {
+ __raw_writel(ack, ®s->event);
+ return IRQ_HANDLED;
+ } else
+ return IRQ_NONE;
+}
+
+/*
+ * PTP clock operations
+ */
+
+static int ptp_ixp_adjfreq(struct ptp_clock_info *ptp, s32 ppb)
+{
+ u64 adj;
+ u32 diff, addend;
+ int neg_adj = 0;
+ struct ixp_clock *ixp_clock = container_of(ptp, struct ixp_clock, caps);
+ struct ixp46x_ts_regs *regs = ixp_clock->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;
+
+ __raw_writel(addend, ®s->addend);
+
+ return 0;
+}
+
+static int ptp_ixp_adjtime(struct ptp_clock_info *ptp, s64 delta)
+{
+ s64 now;
+ unsigned long flags;
+ struct ixp_clock *ixp_clock = container_of(ptp, struct ixp_clock, caps);
+ struct ixp46x_ts_regs *regs = ixp_clock->regs;
+
+ spin_lock_irqsave(®ister_lock, flags);
+
+ now = ixp_systime_read(regs);
+ now += delta;
+ ixp_systime_write(regs, now);
+
+ spin_unlock_irqrestore(®ister_lock, flags);
+
+ return 0;
+}
+
+static int ptp_ixp_gettime(struct ptp_clock_info *ptp, struct timespec64 *ts)
+{
+ u64 ns;
+ unsigned long flags;
+ struct ixp_clock *ixp_clock = container_of(ptp, struct ixp_clock, caps);
+ struct ixp46x_ts_regs *regs = ixp_clock->regs;
+
+ spin_lock_irqsave(®ister_lock, flags);
+
+ ns = ixp_systime_read(regs);
+
+ spin_unlock_irqrestore(®ister_lock, flags);
+
+ *ts = ns_to_timespec64(ns);
+ return 0;
+}
+
+static int ptp_ixp_settime(struct ptp_clock_info *ptp,
+ const struct timespec64 *ts)
+{
+ u64 ns;
+ unsigned long flags;
+ struct ixp_clock *ixp_clock = container_of(ptp, struct ixp_clock, caps);
+ struct ixp46x_ts_regs *regs = ixp_clock->regs;
+
+ ns = timespec64_to_ns(ts);
+
+ spin_lock_irqsave(®ister_lock, flags);
+
+ ixp_systime_write(regs, ns);
+
+ spin_unlock_irqrestore(®ister_lock, flags);
+
+ return 0;
+}
+
+static int ptp_ixp_enable(struct ptp_clock_info *ptp,
+ struct ptp_clock_request *rq, int on)
+{
+ struct ixp_clock *ixp_clock = container_of(ptp, struct ixp_clock, caps);
+
+ switch (rq->type) {
+ case PTP_CLK_REQ_EXTTS:
+ switch (rq->extts.index) {
+ case 0:
+ ixp_clock->exts0_enabled = on ? 1 : 0;
+ break;
+ case 1:
+ ixp_clock->exts1_enabled = on ? 1 : 0;
+ break;
+ default:
+ return -EINVAL;
+ }
+ return 0;
+ default:
+ break;
+ }
+
+ return -EOPNOTSUPP;
+}
+
+static const struct ptp_clock_info ptp_ixp_caps = {
+ .owner = THIS_MODULE,
+ .name = "IXP46X timer",
+ .max_adj = 66666655,
+ .n_ext_ts = N_EXT_TS,
+ .n_pins = 0,
+ .pps = 0,
+ .adjfreq = ptp_ixp_adjfreq,
+ .adjtime = ptp_ixp_adjtime,
+ .gettime64 = ptp_ixp_gettime,
+ .settime64 = ptp_ixp_settime,
+ .enable = ptp_ixp_enable,
+};
+
+/* module operations */
+
+static struct ixp_clock ixp_clock;
+
+static int setup_interrupt(int gpio)
+{
+ int irq;
+ int err;
+
+ err = gpio_request(gpio, "ixp4-ptp");
+ if (err)
+ return err;
+
+ err = gpio_direction_input(gpio);
+ if (err)
+ return err;
+
+ irq = gpio_to_irq(gpio);
+ if (irq < 0)
+ return irq;
+
+ err = irq_set_irq_type(irq, IRQF_TRIGGER_FALLING);
+ if (err) {
+ pr_err("cannot set trigger type for irq %d\n", irq);
+ return err;
+ }
+
+ err = request_irq(irq, isr, 0, DRIVER, &ixp_clock);
+ if (err) {
+ pr_err("request_irq failed for irq %d\n", irq);
+ return err;
+ }
+
+ return irq;
+}
+
+static void __exit ptp_ixp_exit(void)
+{
+ free_irq(MASTER_IRQ, &ixp_clock);
+ free_irq(SLAVE_IRQ, &ixp_clock);
+ ixp46x_phc_index = -1;
+ ptp_clock_unregister(ixp_clock.ptp_clock);
+}
+
+static int __init ptp_ixp_init(void)
+{
+ if (!cpu_is_ixp46x())
+ return -ENODEV;
+
+ ixp_clock.regs =
+ (struct ixp46x_ts_regs __iomem *) IXP4XX_TIMESYNC_BASE_VIRT;
+
+ ixp_clock.caps = ptp_ixp_caps;
+
+ ixp_clock.ptp_clock = ptp_clock_register(&ixp_clock.caps, NULL);
+
+ if (IS_ERR(ixp_clock.ptp_clock))
+ return PTR_ERR(ixp_clock.ptp_clock);
+
+ ixp46x_phc_index = ptp_clock_index(ixp_clock.ptp_clock);
+
+ __raw_writel(DEFAULT_ADDEND, &ixp_clock.regs->addend);
+ __raw_writel(1, &ixp_clock.regs->trgt_lo);
+ __raw_writel(0, &ixp_clock.regs->trgt_hi);
+ __raw_writel(TTIPEND, &ixp_clock.regs->event);
+
+ if (MASTER_IRQ != setup_interrupt(MASTER_GPIO)) {
+ pr_err("failed to setup gpio %d as irq\n", MASTER_GPIO);
+ goto no_master;
+ }
+ if (SLAVE_IRQ != setup_interrupt(SLAVE_GPIO)) {
+ pr_err("failed to setup gpio %d as irq\n", SLAVE_GPIO);
+ goto no_slave;
+ }
+
+ return 0;
+no_slave:
+ free_irq(MASTER_IRQ, &ixp_clock);
+no_master:
+ ptp_clock_unregister(ixp_clock.ptp_clock);
+ return -ENODEV;
+}
+
+module_init(ptp_ixp_init);
+module_exit(ptp_ixp_exit);
+
+MODULE_AUTHOR("Richard Cochran <richardcochran@gmail.com>");
+MODULE_DESCRIPTION("PTP clock using the IXP46X timer");
+MODULE_LICENSE("GPL");
--- /dev/null
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * PTP 1588 clock using the IXP46X
+ *
+ * Copyright (C) 2010 OMICRON electronics GmbH
+ */
+
+#ifndef _IXP46X_TS_H_
+#define _IXP46X_TS_H_
+
+#define DEFAULT_ADDEND 0xF0000029
+#define TICKS_NS_SHIFT 4
+
+struct ixp46x_channel_ctl {
+ u32 ch_control; /* 0x40 Time Synchronization Channel Control */
+ u32 ch_event; /* 0x44 Time Synchronization Channel Event */
+ u32 tx_snap_lo; /* 0x48 Transmit Snapshot Low Register */
+ u32 tx_snap_hi; /* 0x4C Transmit Snapshot High Register */
+ u32 rx_snap_lo; /* 0x50 Receive Snapshot Low Register */
+ u32 rx_snap_hi; /* 0x54 Receive Snapshot High Register */
+ u32 src_uuid_lo; /* 0x58 Source UUID0 Low Register */
+ u32 src_uuid_hi; /* 0x5C Sequence Identifier/Source UUID0 High */
+};
+
+struct ixp46x_ts_regs {
+ u32 control; /* 0x00 Time Sync Control Register */
+ u32 event; /* 0x04 Time Sync Event Register */
+ u32 addend; /* 0x08 Time Sync Addend Register */
+ u32 accum; /* 0x0C Time Sync Accumulator Register */
+ u32 test; /* 0x10 Time Sync Test Register */
+ u32 unused; /* 0x14 */
+ u32 rsystime_lo; /* 0x18 RawSystemTime_Low Register */
+ u32 rsystime_hi; /* 0x1C RawSystemTime_High Register */
+ u32 systime_lo; /* 0x20 SystemTime_Low Register */
+ u32 systime_hi; /* 0x24 SystemTime_High Register */
+ u32 trgt_lo; /* 0x28 TargetTime_Low Register */
+ u32 trgt_hi; /* 0x2C TargetTime_High Register */
+ u32 asms_lo; /* 0x30 Auxiliary Slave Mode Snapshot Low */
+ u32 asms_hi; /* 0x34 Auxiliary Slave Mode Snapshot High */
+ u32 amms_lo; /* 0x38 Auxiliary Master Mode Snapshot Low */
+ u32 amms_hi; /* 0x3C Auxiliary Master Mode Snapshot High */
+
+ struct ixp46x_channel_ctl channel[3];
+};
+
+/* 0x00 Time Sync Control Register Bits */
+#define TSCR_AMM (1<<3)
+#define TSCR_ASM (1<<2)
+#define TSCR_TTM (1<<1)
+#define TSCR_RST (1<<0)
+
+/* 0x04 Time Sync Event Register Bits */
+#define TSER_SNM (1<<3)
+#define TSER_SNS (1<<2)
+#define TTIPEND (1<<1)
+
+/* 0x40 Time Synchronization Channel Control Register Bits */
+#define MASTER_MODE (1<<0)
+#define TIMESTAMP_ALL (1<<1)
+
+/* 0x44 Time Synchronization Channel Event Register Bits */
+#define TX_SNAPSHOT_LOCKED (1<<0)
+#define RX_SNAPSHOT_LOCKED (1<<1)
+
+/* The ptp_ixp46x module will set this variable */
+extern int ixp46x_phc_index;
+
+#endif
To compile this driver as a module, choose M here: the module
will be called ptp-qoriq.
-config PTP_1588_CLOCK_IXP46X
- tristate "Intel IXP46x as PTP clock"
- depends on IXP4XX_ETH
- depends on PTP_1588_CLOCK
- default y
- help
- This driver adds support for using the IXP46X 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_ixp46x.
-
comment "Enable PHYLIB and NETWORK_PHY_TIMESTAMPING to see the additional clocks."
depends on PHYLIB=n || NETWORK_PHY_TIMESTAMPING=n
obj-$(CONFIG_PTP_1588_CLOCK) += ptp.o
obj-$(CONFIG_PTP_1588_CLOCK_DTE) += ptp_dte.o
obj-$(CONFIG_PTP_1588_CLOCK_INES) += ptp_ines.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
ptp-qoriq-y += ptp_qoriq.o
ptp-qoriq-$(CONFIG_DEBUG_FS) += ptp_qoriq_debugfs.o
-obj-$(CONFIG_PTP_1588_CLOCK_IDTCM) += ptp_clockmatrix.o
\ No newline at end of file
+obj-$(CONFIG_PTP_1588_CLOCK_IDTCM) += ptp_clockmatrix.o
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * PTP 1588 clock using the IXP46X
- *
- * Copyright (C) 2010 OMICRON electronics GmbH
- */
-#include <linux/device.h>
-#include <linux/err.h>
-#include <linux/gpio.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/ptp_clock_kernel.h>
-#include <mach/ixp46x_ts.h>
-
-#define DRIVER "ptp_ixp46x"
-#define N_EXT_TS 2
-#define MASTER_GPIO 8
-#define MASTER_IRQ 25
-#define SLAVE_GPIO 7
-#define SLAVE_IRQ 24
-
-struct ixp_clock {
- struct ixp46x_ts_regs *regs;
- struct ptp_clock *ptp_clock;
- struct ptp_clock_info caps;
- int exts0_enabled;
- int exts1_enabled;
-};
-
-DEFINE_SPINLOCK(register_lock);
-
-/*
- * Register access functions
- */
-
-static u64 ixp_systime_read(struct ixp46x_ts_regs *regs)
-{
- u64 ns;
- u32 lo, hi;
-
- lo = __raw_readl(®s->systime_lo);
- hi = __raw_readl(®s->systime_hi);
-
- ns = ((u64) hi) << 32;
- ns |= lo;
- ns <<= TICKS_NS_SHIFT;
-
- return ns;
-}
-
-static void ixp_systime_write(struct ixp46x_ts_regs *regs, u64 ns)
-{
- u32 hi, lo;
-
- ns >>= TICKS_NS_SHIFT;
- hi = ns >> 32;
- lo = ns & 0xffffffff;
-
- __raw_writel(lo, ®s->systime_lo);
- __raw_writel(hi, ®s->systime_hi);
-}
-
-/*
- * Interrupt service routine
- */
-
-static irqreturn_t isr(int irq, void *priv)
-{
- struct ixp_clock *ixp_clock = priv;
- struct ixp46x_ts_regs *regs = ixp_clock->regs;
- struct ptp_clock_event event;
- u32 ack = 0, lo, hi, val;
-
- val = __raw_readl(®s->event);
-
- if (val & TSER_SNS) {
- ack |= TSER_SNS;
- if (ixp_clock->exts0_enabled) {
- hi = __raw_readl(®s->asms_hi);
- lo = __raw_readl(®s->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(ixp_clock->ptp_clock, &event);
- }
- }
-
- if (val & TSER_SNM) {
- ack |= TSER_SNM;
- if (ixp_clock->exts1_enabled) {
- hi = __raw_readl(®s->amms_hi);
- lo = __raw_readl(®s->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(ixp_clock->ptp_clock, &event);
- }
- }
-
- if (val & TTIPEND)
- ack |= TTIPEND; /* this bit seems to be always set */
-
- if (ack) {
- __raw_writel(ack, ®s->event);
- return IRQ_HANDLED;
- } else
- return IRQ_NONE;
-}
-
-/*
- * PTP clock operations
- */
-
-static int ptp_ixp_adjfreq(struct ptp_clock_info *ptp, s32 ppb)
-{
- u64 adj;
- u32 diff, addend;
- int neg_adj = 0;
- struct ixp_clock *ixp_clock = container_of(ptp, struct ixp_clock, caps);
- struct ixp46x_ts_regs *regs = ixp_clock->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;
-
- __raw_writel(addend, ®s->addend);
-
- return 0;
-}
-
-static int ptp_ixp_adjtime(struct ptp_clock_info *ptp, s64 delta)
-{
- s64 now;
- unsigned long flags;
- struct ixp_clock *ixp_clock = container_of(ptp, struct ixp_clock, caps);
- struct ixp46x_ts_regs *regs = ixp_clock->regs;
-
- spin_lock_irqsave(®ister_lock, flags);
-
- now = ixp_systime_read(regs);
- now += delta;
- ixp_systime_write(regs, now);
-
- spin_unlock_irqrestore(®ister_lock, flags);
-
- return 0;
-}
-
-static int ptp_ixp_gettime(struct ptp_clock_info *ptp, struct timespec64 *ts)
-{
- u64 ns;
- unsigned long flags;
- struct ixp_clock *ixp_clock = container_of(ptp, struct ixp_clock, caps);
- struct ixp46x_ts_regs *regs = ixp_clock->regs;
-
- spin_lock_irqsave(®ister_lock, flags);
-
- ns = ixp_systime_read(regs);
-
- spin_unlock_irqrestore(®ister_lock, flags);
-
- *ts = ns_to_timespec64(ns);
- return 0;
-}
-
-static int ptp_ixp_settime(struct ptp_clock_info *ptp,
- const struct timespec64 *ts)
-{
- u64 ns;
- unsigned long flags;
- struct ixp_clock *ixp_clock = container_of(ptp, struct ixp_clock, caps);
- struct ixp46x_ts_regs *regs = ixp_clock->regs;
-
- ns = timespec64_to_ns(ts);
-
- spin_lock_irqsave(®ister_lock, flags);
-
- ixp_systime_write(regs, ns);
-
- spin_unlock_irqrestore(®ister_lock, flags);
-
- return 0;
-}
-
-static int ptp_ixp_enable(struct ptp_clock_info *ptp,
- struct ptp_clock_request *rq, int on)
-{
- struct ixp_clock *ixp_clock = container_of(ptp, struct ixp_clock, caps);
-
- switch (rq->type) {
- case PTP_CLK_REQ_EXTTS:
- switch (rq->extts.index) {
- case 0:
- ixp_clock->exts0_enabled = on ? 1 : 0;
- break;
- case 1:
- ixp_clock->exts1_enabled = on ? 1 : 0;
- break;
- default:
- return -EINVAL;
- }
- return 0;
- default:
- break;
- }
-
- return -EOPNOTSUPP;
-}
-
-static const struct ptp_clock_info ptp_ixp_caps = {
- .owner = THIS_MODULE,
- .name = "IXP46X timer",
- .max_adj = 66666655,
- .n_ext_ts = N_EXT_TS,
- .n_pins = 0,
- .pps = 0,
- .adjfreq = ptp_ixp_adjfreq,
- .adjtime = ptp_ixp_adjtime,
- .gettime64 = ptp_ixp_gettime,
- .settime64 = ptp_ixp_settime,
- .enable = ptp_ixp_enable,
-};
-
-/* module operations */
-
-static struct ixp_clock ixp_clock;
-
-static int setup_interrupt(int gpio)
-{
- int irq;
- int err;
-
- err = gpio_request(gpio, "ixp4-ptp");
- if (err)
- return err;
-
- err = gpio_direction_input(gpio);
- if (err)
- return err;
-
- irq = gpio_to_irq(gpio);
- if (irq < 0)
- return irq;
-
- err = irq_set_irq_type(irq, IRQF_TRIGGER_FALLING);
- if (err) {
- pr_err("cannot set trigger type for irq %d\n", irq);
- return err;
- }
-
- err = request_irq(irq, isr, 0, DRIVER, &ixp_clock);
- if (err) {
- pr_err("request_irq failed for irq %d\n", irq);
- return err;
- }
-
- return irq;
-}
-
-static void __exit ptp_ixp_exit(void)
-{
- free_irq(MASTER_IRQ, &ixp_clock);
- free_irq(SLAVE_IRQ, &ixp_clock);
- ixp46x_phc_index = -1;
- ptp_clock_unregister(ixp_clock.ptp_clock);
-}
-
-static int __init ptp_ixp_init(void)
-{
- if (!cpu_is_ixp46x())
- return -ENODEV;
-
- ixp_clock.regs =
- (struct ixp46x_ts_regs __iomem *) IXP4XX_TIMESYNC_BASE_VIRT;
-
- ixp_clock.caps = ptp_ixp_caps;
-
- ixp_clock.ptp_clock = ptp_clock_register(&ixp_clock.caps, NULL);
-
- if (IS_ERR(ixp_clock.ptp_clock))
- return PTR_ERR(ixp_clock.ptp_clock);
-
- ixp46x_phc_index = ptp_clock_index(ixp_clock.ptp_clock);
-
- __raw_writel(DEFAULT_ADDEND, &ixp_clock.regs->addend);
- __raw_writel(1, &ixp_clock.regs->trgt_lo);
- __raw_writel(0, &ixp_clock.regs->trgt_hi);
- __raw_writel(TTIPEND, &ixp_clock.regs->event);
-
- if (MASTER_IRQ != setup_interrupt(MASTER_GPIO)) {
- pr_err("failed to setup gpio %d as irq\n", MASTER_GPIO);
- goto no_master;
- }
- if (SLAVE_IRQ != setup_interrupt(SLAVE_GPIO)) {
- pr_err("failed to setup gpio %d as irq\n", SLAVE_GPIO);
- goto no_slave;
- }
-
- return 0;
-no_slave:
- free_irq(MASTER_IRQ, &ixp_clock);
-no_master:
- ptp_clock_unregister(ixp_clock.ptp_clock);
- return -ENODEV;
-}
-
-module_init(ptp_ixp_init);
-module_exit(ptp_ixp_exit);
-
-MODULE_AUTHOR("Richard Cochran <richardcochran@gmail.com>");
-MODULE_DESCRIPTION("PTP clock using the IXP46X timer");
-MODULE_LICENSE("GPL");
projects / linux.git / commitdiff