Message-ID: <1425534351-1065-7-git-send-email-Emilian.Medve@Freescale.com>
Date:	Wed, 4 Mar 2015 23:45:50 -0600
From:	Emil Medve <Emilian.Medve@...escale.com>
To:	<linuxppc-dev@...ts.ozlabs.org>, <netdev@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>
CC:	Igal Liberman <Igal.Liberman@...escale.com>
Subject: [PATCH 6/7] soc/fman: Add the FMan RTC FLIB

From: Igal Liberman <Igal.Liberman@...escale.com>

Signed-off-by: Igal Liberman <Igal.Liberman@...escale.com>
---
 drivers/soc/fsl/fman/Kconfig        |   6 +
 drivers/soc/fsl/fman/Makefile       |   1 +
 drivers/soc/fsl/fman/rtc/Makefile   |  13 ++
 drivers/soc/fsl/fman/rtc/fman_rtc.c | 354 ++++++++++++++++++++++++++++++++++++
 4 files changed, 374 insertions(+)
 create mode 100644 drivers/soc/fsl/fman/rtc/Makefile
 create mode 100644 drivers/soc/fsl/fman/rtc/fman_rtc.c

diff --git a/drivers/soc/fsl/fman/Kconfig b/drivers/soc/fsl/fman/Kconfig
index 2559ee9..a144eb5 100644
--- a/drivers/soc/fsl/fman/Kconfig
+++ b/drivers/soc/fsl/fman/Kconfig
@@ -26,4 +26,10 @@ config FSL_FMAN_PCD
 	help
 		Freescale DPAA FMan Parse, Classify and Distribute support
 
+config FSL_FMAN_RTC
+	bool "FMan RTC"
+	default n
+	help
+		Freescale DPAA FMan Real Time Clock (PTP) support
+
 endif	# FSL_FMAN
diff --git a/drivers/soc/fsl/fman/Makefile b/drivers/soc/fsl/fman/Makefile
index dc37f35..f415188 100644
--- a/drivers/soc/fsl/fman/Makefile
+++ b/drivers/soc/fsl/fman/Makefile
@@ -13,5 +13,6 @@ fsl_fman-objs			:= fman.o
 obj-$(CONFIG_FSL_FMAN_PORT)	+= port/
 obj-$(CONFIG_FSL_FMAN_MAC)	+= mac/
 obj-$(CONFIG_FSL_FMAN_PCD)	+= pcd/
+obj-$(CONFIG_FSL_FMAN_RTC)	+= rtc/
 
 endif
diff --git a/drivers/soc/fsl/fman/rtc/Makefile b/drivers/soc/fsl/fman/rtc/Makefile
new file mode 100644
index 0000000..69a92fb
--- /dev/null
+++ b/drivers/soc/fsl/fman/rtc/Makefile
@@ -0,0 +1,13 @@
+ccflags-y += -DVERSION=\"\"
+
+ifeq ($(CONFIG_FSL_FMAN_RTC),y)
+
+FMAN = $(srctree)/drivers/soc/fsl/fman
+
+ccflags-y += -I$(FMAN)/flib
+
+obj-$(CONFIG_FSL_FMAN_RTC)	+= fsl_fman_rtc.o
+
+fsl_fman_rtc-objs		:= fman_rtc.o
+
+endif
diff --git a/drivers/soc/fsl/fman/rtc/fman_rtc.c b/drivers/soc/fsl/fman/rtc/fman_rtc.c
new file mode 100644
index 0000000..e6d6dae
--- /dev/null
+++ b/drivers/soc/fsl/fman/rtc/fman_rtc.c
@@ -0,0 +1,354 @@
+/*
+ * Copyright 2008-2015 Freescale Semiconductor Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in the
+ *       documentation and/or other materials provided with the distribution.
+ *     * Neither the name of Freescale Semiconductor nor the
+ *       names of its contributors may be used to endorse or promote products
+ *       derived from this software without specific prior written permission.
+ *
+ *
+ * ALTERNATIVELY, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") as published by the Free Software
+ * Foundation, either version 2 of that License or (at your option) any
+ * later version.
+ *
+ * THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "fsl_fman_rtc.h"
+
+void fman_rtc_defconfig(struct rtc_cfg *cfg)
+{
+	int i;
+
+	cfg->src_clk = DEFAULT_SRC_CLOCK;
+	cfg->invert_input_clk_phase = DEFAULT_INVERT_INPUT_CLK_PHASE;
+	cfg->invert_output_clk_phase = DEFAULT_INVERT_OUTPUT_CLK_PHASE;
+	cfg->pulse_realign = DEFAULT_PULSE_REALIGN;
+	for (i = 0; i < FMAN_RTC_MAX_NUM_OF_ALARMS; i++)
+		cfg->alarm_polarity[i] = DEFAULT_ALARM_POLARITY;
+	for (i = 0; i < FMAN_RTC_MAX_NUM_OF_EXT_TRIGGERS; i++)
+		cfg->trigger_polarity[i] = DEFAULT_TRIGGER_POLARITY;
+}
+
+uint32_t fman_rtc_get_events(struct rtc_regs __iomem *regs)
+{
+	return ioread32be(&regs->tmr_tevent);
+}
+
+uint32_t fman_rtc_get_event(struct rtc_regs __iomem *regs, uint32_t ev_mask)
+{
+	return ioread32be(&regs->tmr_tevent) & ev_mask;
+}
+
+uint32_t fman_rtc_get_interrupt_mask(struct rtc_regs __iomem *regs)
+{
+	return ioread32be(&regs->tmr_temask);
+}
+
+void fman_rtc_set_interrupt_mask(struct rtc_regs __iomem *regs, uint32_t mask)
+{
+	iowrite32be(mask, &regs->tmr_temask);
+}
+
+void fman_rtc_ack_event(struct rtc_regs __iomem *regs, uint32_t events)
+{
+	iowrite32be(events, &regs->tmr_tevent);
+}
+
+uint32_t fman_rtc_check_and_clear_event(struct rtc_regs __iomem *regs)
+{
+	uint32_t event;
+
+	event = ioread32be(&regs->tmr_tevent);
+	event &= ioread32be(&regs->tmr_temask);
+
+	if (event)
+		iowrite32be(event, &regs->tmr_tevent);
+	return event;
+}
+
+uint32_t fman_rtc_get_frequency_compensation(struct rtc_regs __iomem *regs)
+{
+	return ioread32be(&regs->tmr_add);
+}
+
+void fman_rtc_set_frequency_compensation(struct rtc_regs __iomem *regs,
+					 uint32_t val)
+{
+	iowrite32be(val, &regs->tmr_add);
+}
+
+void fman_rtc_enable_interrupt(struct rtc_regs __iomem *regs, uint32_t events)
+{
+	fman_rtc_set_interrupt_mask(regs,
+				    fman_rtc_get_interrupt_mask(regs) | events);
+}
+
+void fman_rtc_disable_interrupt(struct rtc_regs __iomem *regs, uint32_t events)
+{
+	fman_rtc_set_interrupt_mask(regs,
+				    fman_rtc_get_interrupt_mask(regs) &
+				    ~events);
+}
+
+void fman_rtc_set_timer_alarm_l(struct rtc_regs __iomem *regs, int index,
+				uint32_t val)
+{
+	iowrite32be(val, &regs->tmr_alarm[index].tmr_alarm_l);
+}
+
+void fman_rtc_set_timer_fiper(struct rtc_regs __iomem *regs, int index,
+			      uint32_t val)
+{
+	iowrite32be(val, &regs->tmr_fiper[index]);
+}
+
+void fman_rtc_set_timer_alarm(struct rtc_regs __iomem *regs, int index,
+			      int64_t val)
+{
+	iowrite32be((uint32_t)val, &regs->tmr_alarm[index].tmr_alarm_l);
+	iowrite32be((uint32_t)(val >> 32),
+		    &regs->tmr_alarm[index].tmr_alarm_h);
+}
+
+void fman_rtc_set_timer_offset(struct rtc_regs __iomem *regs, int64_t val)
+{
+	iowrite32be((uint32_t)val, &regs->tmr_off_l);
+	iowrite32be((uint32_t)(val >> 32), &regs->tmr_off_h);
+}
+
+uint64_t fman_rtc_get_trigger_stamp(struct rtc_regs __iomem *regs, int id)
+{
+	uint64_t time;
+	/* TMR_CNT_L must be read first to get an accurate value */
+	time = (uint64_t)ioread32be(&regs->tmr_etts[id].tmr_etts_l);
+	time |= ((uint64_t)ioread32be(&regs->tmr_etts[id].tmr_etts_h)
+		 << 32);
+
+	return time;
+}
+
+uint32_t fman_rtc_get_timer_ctrl(struct rtc_regs __iomem *regs)
+{
+	return ioread32be(&regs->tmr_ctrl);
+}
+
+void fman_rtc_set_timer_ctrl(struct rtc_regs __iomem *regs, uint32_t val)
+{
+	iowrite32be(val, &regs->tmr_ctrl);
+}
+
+void fman_rtc_timers_soft_reset(struct rtc_regs __iomem *regs)
+{
+	fman_rtc_set_timer_ctrl(regs, FMAN_RTC_TMR_CTRL_TMSR);
+	udelay(10);
+	fman_rtc_set_timer_ctrl(regs, 0);
+}
+
+void fman_rtc_init(struct rtc_cfg *cfg, struct rtc_regs __iomem *regs,
+		   int num_alarms, int num_fipers, int num_ext_triggers,
+		   bool init_freq_comp, uint32_t freq_compensation,
+		   uint32_t output_clock_divisor)
+{
+	uint32_t tmr_ctrl;
+	int i;
+
+	fman_rtc_timers_soft_reset(regs);
+
+	/* Set the source clock */
+	switch (cfg->src_clk) {
+	case FMAN_RTC_SOURCE_CLOCK_SYSTEM:
+		tmr_ctrl = FMAN_RTC_TMR_CTRL_CKSEL_MAC_CLK;
+		break;
+	case FMAN_RTC_SOURCE_CLOCK_OSCILATOR:
+		tmr_ctrl = FMAN_RTC_TMR_CTRL_CKSEL_OSC_CLK;
+		break;
+	default:
+		/* Use a clock from the External TMR reference clock. */
+		tmr_ctrl = FMAN_RTC_TMR_CTRL_CKSEL_EXT_CLK;
+		break;
+	}
+
+	/* whatever period the user picked, the timestamp will advance in '1'
+	 * every time the period passed.
+	 **/
+	tmr_ctrl |= ((1 << FMAN_RTC_TMR_CTRL_TCLK_PERIOD_SHIFT) &
+		     FMAN_RTC_TMR_CTRL_TCLK_PERIOD_MASK);
+
+	if (cfg->invert_input_clk_phase)
+		tmr_ctrl |= FMAN_RTC_TMR_CTRL_CIPH;
+	if (cfg->invert_output_clk_phase)
+		tmr_ctrl |= FMAN_RTC_TMR_CTRL_COPH;
+
+	for (i = 0; i < num_alarms; i++) {
+		if (cfg->alarm_polarity[i] ==
+		    FMAN_RTC_ALARM_POLARITY_ACTIVE_LOW)
+			tmr_ctrl |= (FMAN_RTC_TMR_CTRL_ALMP1 >> i);
+	}
+
+	for (i = 0; i < num_ext_triggers; i++)
+		if (cfg->trigger_polarity[i] ==
+		    FMAN_RTC_TRIGGER_ON_FALLING_EDGE)
+			tmr_ctrl |= (FMAN_RTC_TMR_CTRL_ETEP1 << i);
+
+	if (!cfg->timer_slave_mode && cfg->bypass)
+		tmr_ctrl |= FMAN_RTC_TMR_CTRL_BYP;
+
+	fman_rtc_set_timer_ctrl(regs, tmr_ctrl);
+	if (init_freq_comp)
+		fman_rtc_set_frequency_compensation(regs, freq_compensation);
+
+	/* Clear TMR_ALARM registers */
+	for (i = 0; i < num_alarms; i++)
+		fman_rtc_set_timer_alarm(regs, i, 0xFFFFFFFFFFFFFFFFLL);
+
+	/* Clear TMR_TEVENT */
+	fman_rtc_ack_event(regs, FMAN_RTC_TMR_TEVENT_ALL);
+
+	/* Initialize TMR_TEMASK */
+	fman_rtc_set_interrupt_mask(regs, 0);
+
+	/* Clear TMR_FIPER registers */
+	for (i = 0; i < num_fipers; i++)
+		fman_rtc_set_timer_fiper(regs, i, 0xFFFFFFFF);
+
+	/* Initialize TMR_PRSC */
+	iowrite32be(output_clock_divisor, &regs->tmr_prsc);
+
+	/* Clear TMR_OFF */
+	fman_rtc_set_timer_offset(regs, 0);
+}
+
+bool fman_rtc_is_enabled(struct rtc_regs __iomem *regs)
+{
+	return (bool)(fman_rtc_get_timer_ctrl(regs) & FMAN_RTC_TMR_CTRL_TE);
+}
+
+void fman_rtc_enable(struct rtc_regs __iomem *regs, bool reset_clock)
+{
+	uint32_t tmr_ctrl = fman_rtc_get_timer_ctrl(regs);
+
+	/* TODO check that no timestamping MACs are working in this stage. */
+	if (reset_clock) {
+		fman_rtc_set_timer_ctrl(regs,
+					(tmr_ctrl | FMAN_RTC_TMR_CTRL_TMSR));
+
+		udelay(10);
+		/* Clear TMR_OFF */
+		fman_rtc_set_timer_offset(regs, 0);
+	}
+
+	fman_rtc_set_timer_ctrl(regs, (tmr_ctrl | FMAN_RTC_TMR_CTRL_TE));
+}
+
+void fman_rtc_disable(struct rtc_regs __iomem *regs)
+{
+	fman_rtc_set_timer_ctrl(regs,
+				(fman_rtc_get_timer_ctrl(regs) &
+				~(FMAN_RTC_TMR_CTRL_TE)));
+}
+
+void fman_rtc_clear_periodic_pulse(struct rtc_regs __iomem *regs, int id)
+{
+	uint32_t tmp_reg;
+
+	if (id == 0)
+		tmp_reg = FMAN_RTC_TMR_TEVENT_PP1;
+	else
+		tmp_reg = FMAN_RTC_TMR_TEVENT_PP2;
+	fman_rtc_disable_interrupt(regs, tmp_reg);
+
+	tmp_reg = fman_rtc_get_timer_ctrl(regs);
+	if (tmp_reg & FMAN_RTC_TMR_CTRL_FS)
+		fman_rtc_set_timer_ctrl(regs, tmp_reg & ~FMAN_RTC_TMR_CTRL_FS);
+
+	fman_rtc_set_timer_fiper(regs, id, 0xFFFFFFFF);
+}
+
+void fman_rtc_clear_external_trigger(struct rtc_regs __iomem *regs, int id)
+{
+	uint32_t tmp_reg, tmp_ctrl;
+
+	if (id == 0)
+		tmp_reg = FMAN_RTC_TMR_TEVENT_ETS1;
+	else
+		tmp_reg = FMAN_RTC_TMR_TEVENT_ETS2;
+	fman_rtc_disable_interrupt(regs, tmp_reg);
+
+	if (id == 0)
+		tmp_reg = FMAN_RTC_TMR_CTRL_PP1L;
+	else
+		tmp_reg = FMAN_RTC_TMR_CTRL_PP2L;
+	tmp_ctrl = fman_rtc_get_timer_ctrl(regs);
+	if (tmp_ctrl & tmp_reg)
+		fman_rtc_set_timer_ctrl(regs, tmp_ctrl & ~tmp_reg);
+}
+
+void fman_rtc_set_alarm(struct rtc_regs __iomem *regs, int id, uint32_t val,
+			bool enable)
+{
+	uint32_t tmp_reg;
+
+	fman_rtc_set_timer_alarm(regs, id, val);
+	if (enable) {
+		if (id == 0)
+			tmp_reg = FMAN_RTC_TMR_TEVENT_ALM1;
+		else
+			tmp_reg = FMAN_RTC_TMR_TEVENT_ALM2;
+		fman_rtc_enable_interrupt(regs, tmp_reg);
+	}
+}
+
+void fman_rtc_set_periodic_pulse(struct rtc_regs __iomem *regs, int id,
+				 uint32_t val, bool enable)
+{
+	uint32_t tmp_reg;
+
+	fman_rtc_set_timer_fiper(regs, id, val);
+	if (enable) {
+		if (id == 0)
+			tmp_reg = FMAN_RTC_TMR_TEVENT_PP1;
+		else
+			tmp_reg = FMAN_RTC_TMR_TEVENT_PP2;
+		fman_rtc_enable_interrupt(regs, tmp_reg);
+	}
+}
+
+void fman_rtc_set_ext_trigger(struct rtc_regs __iomem *regs, int id,
+			      bool enable, bool use_pulse_as_input)
+{
+	uint32_t tmp_reg;
+
+	if (enable) {
+		if (id == 0)
+			tmp_reg = FMAN_RTC_TMR_TEVENT_ETS1;
+		else
+			tmp_reg = FMAN_RTC_TMR_TEVENT_ETS2;
+		fman_rtc_enable_interrupt(regs, tmp_reg);
+	}
+	if (use_pulse_as_input) {
+		if (id == 0)
+			tmp_reg = FMAN_RTC_TMR_CTRL_PP1L;
+		else
+			tmp_reg = FMAN_RTC_TMR_CTRL_PP2L;
+		fman_rtc_set_timer_ctrl(regs,
+					fman_rtc_get_timer_ctrl(regs) |
+					tmp_reg);
+	}
+}
-- 
2.3.1

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