73d1ed66d3
This patch aligns ipq806x to the new SoC header include scheme. Also alphabetized headers in affected files since we touch them anyway. BUG=None TEST=Tested with whole series. Compiled Storm. Change-Id: Icb81a77e6f458625f5379a980e8760388dd3a1f9 Signed-off-by: Patrick Georgi <pgeorgi@chromium.org> Original-Commit-Id: 1bf23774c9ffa5d08c211f3658d39adcfa47b339 Original-Change-Id: I283cc7e6094be977d67ed4146f376cebcea6774a Original-Signed-off-by: Julius Werner <jwerner@chromium.org> Original-Reviewed-on: https://chromium-review.googlesource.com/224502 Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org> Reviewed-on: http://review.coreboot.org/9368 Reviewed-by: Patrick Georgi <pgeorgi@google.com> Tested-by: Patrick Georgi <pgeorgi@google.com>
100 lines
3.0 KiB
C
100 lines
3.0 KiB
C
/*
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* Copyright (c) 2011 - 2014 The Linux Foundation. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Google, Inc. nor the names of its contributors
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* may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <delay.h>
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#include <soc/iomap.h>
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#include <soc/ipq_timer.h>
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#include <timer.h>
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/*
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* DGT runs at 25 MHz / 4, or 6.25 ticks per microsecond
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*/
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#define DGT_MHZ_NUM 25
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#define DGT_MHZ_DEN 4
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#define TIMER_TICKS(us) ((DGT_MHZ_NUM*(us) + (DGT_MHZ_DEN - 1)) / DGT_MHZ_DEN)
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#define TIMER_USECS(ticks) (DGT_MHZ_DEN*(ticks) / DGT_MHZ_NUM)
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/* Clock divider values for the timer. */
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#define DGT_CLK_DIV_1 0
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#define DGT_CLK_DIV_2 1
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#define DGT_CLK_DIV_3 2
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#define DGT_CLK_DIV_4 3
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/**
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* init_timer - initialize timer
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*/
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void init_timer(void)
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{
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/* disable timer */
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writel_i(0, DGT_ENABLE);
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/* DGT uses TCXO source which is 25MHz.
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* The timer should run at 1/4th the frequency of TCXO
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* according to clock plan.
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* Set clock divider to 4.
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*/
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writel_i(DGT_CLK_DIV_4, DGT_CLK_CTL);
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/* Enable timer */
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writel_i(0, DGT_CLEAR);
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writel_i(DGT_ENABLE_EN, DGT_ENABLE);
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}
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/**
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* udelay - generates micro second delay.
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* @param usec: delay duration in microseconds
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*/
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void udelay(unsigned usec)
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{
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uint32_t now;
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uint32_t last;
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uint32_t ticks;
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uint32_t curr_ticks = 0;
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/* Calculate number of ticks required. */
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ticks = TIMER_TICKS(usec);
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/* Obtain the current timer value. */
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last = readl_i(DGT_COUNT_VAL);
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/* Loop until the right number of ticks. */
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while (curr_ticks < ticks) {
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now = readl_i(DGT_COUNT_VAL);
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curr_ticks += now - last;
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last = now;
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}
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}
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void timer_monotonic_get(struct mono_time *mt)
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{
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mono_time_set_usecs(mt, TIMER_USECS(readl_i(DGT_COUNT_VAL)));
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}
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