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path: root/drivers/net/ethernet/freescale/gianfar_ptp.c
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Diffstat (limited to 'drivers/net/ethernet/freescale/gianfar_ptp.c')
-rw-r--r--drivers/net/ethernet/freescale/gianfar_ptp.c572
1 files changed, 0 insertions, 572 deletions
diff --git a/drivers/net/ethernet/freescale/gianfar_ptp.c b/drivers/net/ethernet/freescale/gianfar_ptp.c
deleted file mode 100644
index 9f8d4f8e57e3..000000000000
--- a/drivers/net/ethernet/freescale/gianfar_ptp.c
+++ /dev/null
@@ -1,572 +0,0 @@
-/*
- * PTP 1588 clock using the eTSEC
- *
- * 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/io.h>
-
-#include <linux/ptp_clock_kernel.h>
-
-#include "gianfar.h"
-
-/*
- * gianfar ptp registers
- * Generated by regen.tcl on Thu May 13 01:38:57 PM CEST 2010
- */
-struct gianfar_ptp_registers {
- u32 tmr_ctrl; /* Timer control register */
- u32 tmr_tevent; /* Timestamp event register */
- u32 tmr_temask; /* Timer event mask register */
- u32 tmr_pevent; /* Timestamp event register */
- u32 tmr_pemask; /* Timer event mask register */
- u32 tmr_stat; /* Timestamp status register */
- u32 tmr_cnt_h; /* Timer counter high register */
- u32 tmr_cnt_l; /* Timer counter low register */
- u32 tmr_add; /* Timer drift compensation addend register */
- u32 tmr_acc; /* Timer accumulator register */
- u32 tmr_prsc; /* Timer prescale */
- u8 res1[4];
- u32 tmroff_h; /* Timer offset high */
- u32 tmroff_l; /* Timer offset low */
- u8 res2[8];
- u32 tmr_alarm1_h; /* Timer alarm 1 high register */
- u32 tmr_alarm1_l; /* Timer alarm 1 high register */
- u32 tmr_alarm2_h; /* Timer alarm 2 high register */
- u32 tmr_alarm2_l; /* Timer alarm 2 high register */
- u8 res3[48];
- u32 tmr_fiper1; /* Timer fixed period interval */
- u32 tmr_fiper2; /* Timer fixed period interval */
- u32 tmr_fiper3; /* Timer fixed period interval */
- u8 res4[20];
- u32 tmr_etts1_h; /* Timestamp of general purpose external trigger */
- u32 tmr_etts1_l; /* Timestamp of general purpose external trigger */
- u32 tmr_etts2_h; /* Timestamp of general purpose external trigger */
- u32 tmr_etts2_l; /* Timestamp of general purpose external trigger */
-};
-
-/* Bit definitions for the TMR_CTRL register */
-#define ALM1P (1<<31) /* Alarm1 output polarity */
-#define ALM2P (1<<30) /* Alarm2 output polarity */
-#define FIPERST (1<<28) /* FIPER start indication */
-#define PP1L (1<<27) /* Fiper1 pulse loopback mode enabled. */
-#define PP2L (1<<26) /* Fiper2 pulse loopback mode enabled. */
-#define TCLK_PERIOD_SHIFT (16) /* 1588 timer reference clock period. */
-#define TCLK_PERIOD_MASK (0x3ff)
-#define RTPE (1<<15) /* Record Tx Timestamp to PAL Enable. */
-#define FRD (1<<14) /* FIPER Realignment Disable */
-#define ESFDP (1<<11) /* External Tx/Rx SFD Polarity. */
-#define ESFDE (1<<10) /* External Tx/Rx SFD Enable. */
-#define ETEP2 (1<<9) /* External trigger 2 edge polarity */
-#define ETEP1 (1<<8) /* External trigger 1 edge polarity */
-#define COPH (1<<7) /* Generated clock output phase. */
-#define CIPH (1<<6) /* External oscillator input clock phase */
-#define TMSR (1<<5) /* Timer soft reset. */
-#define BYP (1<<3) /* Bypass drift compensated clock */
-#define TE (1<<2) /* 1588 timer enable. */
-#define CKSEL_SHIFT (0) /* 1588 Timer reference clock source */
-#define CKSEL_MASK (0x3)
-
-/* Bit definitions for the TMR_TEVENT register */
-#define ETS2 (1<<25) /* External trigger 2 timestamp sampled */
-#define ETS1 (1<<24) /* External trigger 1 timestamp sampled */
-#define ALM2 (1<<17) /* Current time = alarm time register 2 */
-#define ALM1 (1<<16) /* Current time = alarm time register 1 */
-#define PP1 (1<<7) /* periodic pulse generated on FIPER1 */
-#define PP2 (1<<6) /* periodic pulse generated on FIPER2 */
-#define PP3 (1<<5) /* periodic pulse generated on FIPER3 */
-
-/* Bit definitions for the TMR_TEMASK register */
-#define ETS2EN (1<<25) /* External trigger 2 timestamp enable */
-#define ETS1EN (1<<24) /* External trigger 1 timestamp enable */
-#define ALM2EN (1<<17) /* Timer ALM2 event enable */
-#define ALM1EN (1<<16) /* Timer ALM1 event enable */
-#define PP1EN (1<<7) /* Periodic pulse event 1 enable */
-#define PP2EN (1<<6) /* Periodic pulse event 2 enable */
-
-/* Bit definitions for the TMR_PEVENT register */
-#define TXP2 (1<<9) /* PTP transmitted timestamp im TXTS2 */
-#define TXP1 (1<<8) /* PTP transmitted timestamp in TXTS1 */
-#define RXP (1<<0) /* PTP frame has been received */
-
-/* Bit definitions for the TMR_PEMASK register */
-#define TXP2EN (1<<9) /* Transmit PTP packet event 2 enable */
-#define TXP1EN (1<<8) /* Transmit PTP packet event 1 enable */
-#define RXPEN (1<<0) /* Receive PTP packet event enable */
-
-/* Bit definitions for the TMR_STAT register */
-#define STAT_VEC_SHIFT (0) /* Timer general purpose status vector */
-#define STAT_VEC_MASK (0x3f)
-
-/* Bit definitions for the TMR_PRSC register */
-#define PRSC_OCK_SHIFT (0) /* Output clock division/prescale factor. */
-#define PRSC_OCK_MASK (0xffff)
-
-
-#define DRIVER "gianfar_ptp"
-#define DEFAULT_CKSEL 1
-#define N_EXT_TS 2
-#define REG_SIZE sizeof(struct gianfar_ptp_registers)
-
-struct etsects {
- struct gianfar_ptp_registers __iomem *regs;
- spinlock_t lock; /* protects regs */
- struct ptp_clock *clock;
- struct ptp_clock_info caps;
- struct resource *rsrc;
- int irq;
- u64 alarm_interval; /* for periodic alarm */
- u64 alarm_value;
- u32 tclk_period; /* nanoseconds */
- u32 tmr_prsc;
- u32 tmr_add;
- u32 cksel;
- u32 tmr_fiper1;
- u32 tmr_fiper2;
-};
-
-/*
- * Register access functions
- */
-
-/* Caller must hold etsects->lock. */
-static u64 tmr_cnt_read(struct etsects *etsects)
-{
- u64 ns;
- u32 lo, hi;
-
- lo = gfar_read(&etsects->regs->tmr_cnt_l);
- hi = gfar_read(&etsects->regs->tmr_cnt_h);
- ns = ((u64) hi) << 32;
- ns |= lo;
- return ns;
-}
-
-/* Caller must hold etsects->lock. */
-static void tmr_cnt_write(struct etsects *etsects, u64 ns)
-{
- u32 hi = ns >> 32;
- u32 lo = ns & 0xffffffff;
-
- gfar_write(&etsects->regs->tmr_cnt_l, lo);
- gfar_write(&etsects->regs->tmr_cnt_h, hi);
-}
-
-/* Caller must hold etsects->lock. */
-static void set_alarm(struct etsects *etsects)
-{
- u64 ns;
- u32 lo, hi;
-
- ns = tmr_cnt_read(etsects) + 1500000000ULL;
- ns = div_u64(ns, 1000000000UL) * 1000000000ULL;
- ns -= etsects->tclk_period;
- hi = ns >> 32;
- lo = ns & 0xffffffff;
- gfar_write(&etsects->regs->tmr_alarm1_l, lo);
- gfar_write(&etsects->regs->tmr_alarm1_h, hi);
-}
-
-/* Caller must hold etsects->lock. */
-static void set_fipers(struct etsects *etsects)
-{
- set_alarm(etsects);
- gfar_write(&etsects->regs->tmr_fiper1, etsects->tmr_fiper1);
- gfar_write(&etsects->regs->tmr_fiper2, etsects->tmr_fiper2);
-}
-
-/*
- * Interrupt service routine
- */
-
-static irqreturn_t isr(int irq, void *priv)
-{
- struct etsects *etsects = priv;
- struct ptp_clock_event event;
- u64 ns;
- u32 ack = 0, lo, hi, mask, val;
-
- val = gfar_read(&etsects->regs->tmr_tevent);
-
- if (val & ETS1) {
- ack |= ETS1;
- hi = gfar_read(&etsects->regs->tmr_etts1_h);
- lo = gfar_read(&etsects->regs->tmr_etts1_l);
- event.type = PTP_CLOCK_EXTTS;
- event.index = 0;
- event.timestamp = ((u64) hi) << 32;
- event.timestamp |= lo;
- ptp_clock_event(etsects->clock, &event);
- }
-
- if (val & ETS2) {
- ack |= ETS2;
- hi = gfar_read(&etsects->regs->tmr_etts2_h);
- lo = gfar_read(&etsects->regs->tmr_etts2_l);
- event.type = PTP_CLOCK_EXTTS;
- event.index = 1;
- event.timestamp = ((u64) hi) << 32;
- event.timestamp |= lo;
- ptp_clock_event(etsects->clock, &event);
- }
-
- if (val & ALM2) {
- ack |= ALM2;
- if (etsects->alarm_value) {
- event.type = PTP_CLOCK_ALARM;
- event.index = 0;
- event.timestamp = etsects->alarm_value;
- ptp_clock_event(etsects->clock, &event);
- }
- if (etsects->alarm_interval) {
- ns = etsects->alarm_value + etsects->alarm_interval;
- hi = ns >> 32;
- lo = ns & 0xffffffff;
- spin_lock(&etsects->lock);
- gfar_write(&etsects->regs->tmr_alarm2_l, lo);
- gfar_write(&etsects->regs->tmr_alarm2_h, hi);
- spin_unlock(&etsects->lock);
- etsects->alarm_value = ns;
- } else {
- gfar_write(&etsects->regs->tmr_tevent, ALM2);
- spin_lock(&etsects->lock);
- mask = gfar_read(&etsects->regs->tmr_temask);
- mask &= ~ALM2EN;
- gfar_write(&etsects->regs->tmr_temask, mask);
- spin_unlock(&etsects->lock);
- etsects->alarm_value = 0;
- etsects->alarm_interval = 0;
- }
- }
-
- if (val & PP1) {
- ack |= PP1;
- event.type = PTP_CLOCK_PPS;
- ptp_clock_event(etsects->clock, &event);
- }
-
- if (ack) {
- gfar_write(&etsects->regs->tmr_tevent, ack);
- return IRQ_HANDLED;
- } else
- return IRQ_NONE;
-}
-
-/*
- * PTP clock operations
- */
-
-static int ptp_gianfar_adjfine(struct ptp_clock_info *ptp, long scaled_ppm)
-{
- u64 adj, diff;
- u32 tmr_add;
- int neg_adj = 0;
- struct etsects *etsects = container_of(ptp, struct etsects, caps);
-
- if (scaled_ppm < 0) {
- neg_adj = 1;
- scaled_ppm = -scaled_ppm;
- }
- tmr_add = etsects->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;
-
- gfar_write(&etsects->regs->tmr_add, tmr_add);
-
- return 0;
-}
-
-static int ptp_gianfar_adjtime(struct ptp_clock_info *ptp, s64 delta)
-{
- s64 now;
- unsigned long flags;
- struct etsects *etsects = container_of(ptp, struct etsects, caps);
-
- spin_lock_irqsave(&etsects->lock, flags);
-
- now = tmr_cnt_read(etsects);
- now += delta;
- tmr_cnt_write(etsects, now);
- set_fipers(etsects);
-
- spin_unlock_irqrestore(&etsects->lock, flags);
-
- return 0;
-}
-
-static int ptp_gianfar_gettime(struct ptp_clock_info *ptp,
- struct timespec64 *ts)
-{
- u64 ns;
- unsigned long flags;
- struct etsects *etsects = container_of(ptp, struct etsects, caps);
-
- spin_lock_irqsave(&etsects->lock, flags);
-
- ns = tmr_cnt_read(etsects);
-
- spin_unlock_irqrestore(&etsects->lock, flags);
-
- *ts = ns_to_timespec64(ns);
-
- return 0;
-}
-
-static int ptp_gianfar_settime(struct ptp_clock_info *ptp,
- const struct timespec64 *ts)
-{
- u64 ns;
- unsigned long flags;
- struct etsects *etsects = container_of(ptp, struct etsects, caps);
-
- ns = timespec64_to_ns(ts);
-
- spin_lock_irqsave(&etsects->lock, flags);
-
- tmr_cnt_write(etsects, ns);
- set_fipers(etsects);
-
- spin_unlock_irqrestore(&etsects->lock, flags);
-
- return 0;
-}
-
-static int ptp_gianfar_enable(struct ptp_clock_info *ptp,
- struct ptp_clock_request *rq, int on)
-{
- struct etsects *etsects = container_of(ptp, struct etsects, 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(&etsects->lock, flags);
- mask = gfar_read(&etsects->regs->tmr_temask);
- if (on)
- mask |= bit;
- else
- mask &= ~bit;
- gfar_write(&etsects->regs->tmr_temask, mask);
- spin_unlock_irqrestore(&etsects->lock, flags);
- return 0;
-
- case PTP_CLK_REQ_PPS:
- spin_lock_irqsave(&etsects->lock, flags);
- mask = gfar_read(&etsects->regs->tmr_temask);
- if (on)
- mask |= PP1EN;
- else
- mask &= ~PP1EN;
- gfar_write(&etsects->regs->tmr_temask, mask);
- spin_unlock_irqrestore(&etsects->lock, flags);
- return 0;
-
- default:
- break;
- }
-
- return -EOPNOTSUPP;
-}
-
-static const struct ptp_clock_info ptp_gianfar_caps = {
- .owner = THIS_MODULE,
- .name = "gianfar clock",
- .max_adj = 512000,
- .n_alarm = 0,
- .n_ext_ts = N_EXT_TS,
- .n_per_out = 0,
- .n_pins = 0,
- .pps = 1,
- .adjfine = ptp_gianfar_adjfine,
- .adjtime = ptp_gianfar_adjtime,
- .gettime64 = ptp_gianfar_gettime,
- .settime64 = ptp_gianfar_settime,
- .enable = ptp_gianfar_enable,
-};
-
-static int gianfar_ptp_probe(struct platform_device *dev)
-{
- struct device_node *node = dev->dev.of_node;
- struct etsects *etsects;
- struct timespec64 now;
- int err = -ENOMEM;
- u32 tmr_ctrl;
- unsigned long flags;
-
- etsects = kzalloc(sizeof(*etsects), GFP_KERNEL);
- if (!etsects)
- goto no_memory;
-
- err = -ENODEV;
-
- etsects->caps = ptp_gianfar_caps;
-
- if (of_property_read_u32(node, "fsl,cksel", &etsects->cksel))
- etsects->cksel = DEFAULT_CKSEL;
-
- if (of_property_read_u32(node,
- "fsl,tclk-period", &etsects->tclk_period) ||
- of_property_read_u32(node,
- "fsl,tmr-prsc", &etsects->tmr_prsc) ||
- of_property_read_u32(node,
- "fsl,tmr-add", &etsects->tmr_add) ||
- of_property_read_u32(node,
- "fsl,tmr-fiper1", &etsects->tmr_fiper1) ||
- of_property_read_u32(node,
- "fsl,tmr-fiper2", &etsects->tmr_fiper2) ||
- of_property_read_u32(node,
- "fsl,max-adj", &etsects->caps.max_adj)) {
- pr_err("device tree node missing required elements\n");
- goto no_node;
- }
-
- etsects->irq = platform_get_irq(dev, 0);
-
- if (etsects->irq < 0) {
- pr_err("irq not in device tree\n");
- goto no_node;
- }
- if (request_irq(etsects->irq, isr, 0, DRIVER, etsects)) {
- pr_err("request_irq failed\n");
- goto no_node;
- }
-
- etsects->rsrc = platform_get_resource(dev, IORESOURCE_MEM, 0);
- if (!etsects->rsrc) {
- pr_err("no resource\n");
- goto no_resource;
- }
- if (request_resource(&iomem_resource, etsects->rsrc)) {
- pr_err("resource busy\n");
- goto no_resource;
- }
-
- spin_lock_init(&etsects->lock);
-
- etsects->regs = ioremap(etsects->rsrc->start,
- resource_size(etsects->rsrc));
- if (!etsects->regs) {
- pr_err("ioremap ptp registers failed\n");
- goto no_ioremap;
- }
- getnstimeofday64(&now);
- ptp_gianfar_settime(&etsects->caps, &now);
-
- tmr_ctrl =
- (etsects->tclk_period & TCLK_PERIOD_MASK) << TCLK_PERIOD_SHIFT |
- (etsects->cksel & CKSEL_MASK) << CKSEL_SHIFT;
-
- spin_lock_irqsave(&etsects->lock, flags);
-
- gfar_write(&etsects->regs->tmr_ctrl, tmr_ctrl);
- gfar_write(&etsects->regs->tmr_add, etsects->tmr_add);
- gfar_write(&etsects->regs->tmr_prsc, etsects->tmr_prsc);
- gfar_write(&etsects->regs->tmr_fiper1, etsects->tmr_fiper1);
- gfar_write(&etsects->regs->tmr_fiper2, etsects->tmr_fiper2);
- set_alarm(etsects);
- gfar_write(&etsects->regs->tmr_ctrl, tmr_ctrl|FIPERST|RTPE|TE|FRD);
-
- spin_unlock_irqrestore(&etsects->lock, flags);
-
- etsects->clock = ptp_clock_register(&etsects->caps, &dev->dev);
- if (IS_ERR(etsects->clock)) {
- err = PTR_ERR(etsects->clock);
- goto no_clock;
- }
- gfar_phc_index = ptp_clock_index(etsects->clock);
-
- platform_set_drvdata(dev, etsects);
-
- return 0;
-
-no_clock:
- iounmap(etsects->regs);
-no_ioremap:
- release_resource(etsects->rsrc);
-no_resource:
- free_irq(etsects->irq, etsects);
-no_node:
- kfree(etsects);
-no_memory:
- return err;
-}
-
-static int gianfar_ptp_remove(struct platform_device *dev)
-{
- struct etsects *etsects = platform_get_drvdata(dev);
-
- gfar_write(&etsects->regs->tmr_temask, 0);
- gfar_write(&etsects->regs->tmr_ctrl, 0);
-
- gfar_phc_index = -1;
- ptp_clock_unregister(etsects->clock);
- iounmap(etsects->regs);
- release_resource(etsects->rsrc);
- free_irq(etsects->irq, etsects);
- kfree(etsects);
-
- return 0;
-}
-
-static const struct of_device_id match_table[] = {
- { .compatible = "fsl,etsec-ptp" },
- {},
-};
-MODULE_DEVICE_TABLE(of, match_table);
-
-static struct platform_driver gianfar_ptp_driver = {
- .driver = {
- .name = "gianfar_ptp",
- .of_match_table = match_table,
- },
- .probe = gianfar_ptp_probe,
- .remove = gianfar_ptp_remove,
-};
-
-module_platform_driver(gianfar_ptp_driver);
-
-MODULE_AUTHOR("Richard Cochran <richardcochran@gmail.com>");
-MODULE_DESCRIPTION("PTP clock using the eTSEC");
-MODULE_LICENSE("GPL");
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.