exynos5420: Get rid of the PWM code like on the 5250

The timer code was supposed to be using the mct, and also using the monotonic
timer infrastructure instead of the get_timer function. This change had been
made for the 5250 but not yet for the 5420.

Change-Id: I03a4fbb434f2346761f28fb6bd2218b526f2a4a2
Signed-off-by: Gabe Black <gabeblack@google.com>
Reviewed-on: https://gerrit.chromium.org/gerrit/64159
Reviewed-by: Ronald G. Minnich <rminnich@chromium.org>
Commit-Queue: Gabe Black <gabeblack@chromium.org>
Tested-by: Gabe Black <gabeblack@chromium.org>
Reviewed-on: http://review.coreboot.org/4418
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>

1 files changed, 0 insertions, 186 deletions

diff --git a/src/cpu/samsung/exynos5420/pwm.c b/src/cpu/samsung/exynos5420/pwm.c
deleted file mode 100644
index 7375f1b295..0000000000
--- a/src/cpu/samsung/exynos5420/pwm.c
+++ /dev/null
@@ -1,186 +0,0 @@
-/*
- * This file is part of the coreboot project.
- *
- * Copyright (C) 2011 Samsung Electronics
- *
- * 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; version 2 of the License.
- *
- * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include <arch/io.h>
-#include "clk.h"
-#include "cpu.h"
-#include "periph.h"
-#include "pwm.h"
-
-int pwm_enable(int pwm_id)
-{
-	struct s5p_timer *const pwm = samsung_get_base_timer();
-	unsigned long tcon;
-
-	tcon = readl(&pwm->tcon);
-	tcon |= TCON_START(pwm_id);
-
-	writel(tcon, &pwm->tcon);
-
-	return 0;
-}
-
-int pwm_check_enabled(int pwm_id)
-{
-	const struct s5p_timer *const pwm = samsung_get_base_timer();
-	const unsigned long tcon = readl(&pwm->tcon);
-
-	return tcon & TCON_START(pwm_id);
-}
-
-void pwm_disable(int pwm_id)
-{
-	struct s5p_timer *const pwm = samsung_get_base_timer();
-	unsigned long tcon;
-
-	tcon = readl(&pwm->tcon);
-	tcon &= ~TCON_START(pwm_id);
-
-	writel(tcon, &pwm->tcon);
-}
-
-static unsigned long pwm_calc_tin(int pwm_id, unsigned long freq)
-{
-	unsigned long tin_parent_rate;
-	unsigned int div;
-
-	tin_parent_rate = clock_get_periph_rate(PERIPH_ID_PWM0);
-
-	for (div = 2; div <= 16; div *= 2) {
-		if ((tin_parent_rate / (div << 16)) < freq)
-			return tin_parent_rate / div;
-	}
-
-	return tin_parent_rate / 16;
-}
-
-#define NS_IN_SEC 1000000000UL
-
-int pwm_config(int pwm_id, int duty_ns, int period_ns)
-{
-	struct s5p_timer *const pwm = samsung_get_base_timer();
-	unsigned int offset;
-	unsigned long tin_rate;
-	unsigned long tin_ns;
-	unsigned long frequency;
-	unsigned long tcon;
-	unsigned long tcnt;
-	unsigned long tcmp;
-
-	/*
-	 * We currently avoid using 64bit arithmetic by using the
-	 * fact that anything faster than 1GHz is easily representable
-	 * by 32bits.
-	 */
-	if (period_ns > NS_IN_SEC || duty_ns > NS_IN_SEC || period_ns == 0)
-		return -1;
-
-	if (duty_ns > period_ns)
-		return -1;
-
-	frequency = NS_IN_SEC / period_ns;
-
-	/* Check to see if we are changing the clock rate of the PWM */
-	tin_rate = pwm_calc_tin(pwm_id, frequency);
-
-	tin_ns = NS_IN_SEC / tin_rate;
-	tcnt = period_ns / tin_ns;
-
-	/* Note, counters count down */
-	tcmp = duty_ns / tin_ns;
-	tcmp = tcnt - tcmp;
-
-	/* Update the PWM register block. */
-	offset = pwm_id * 3;
-	if (pwm_id < 4) {
-		writel(tcnt, &pwm->tcntb0 + offset);
-		writel(tcmp, &pwm->tcmpb0 + offset);
-	}
-
-	tcon = readl(&pwm->tcon);
-	tcon |= TCON_UPDATE(pwm_id);
-	if (pwm_id < 4)
-		tcon |= TCON_AUTO_RELOAD(pwm_id);
-	else
-		tcon |= TCON4_AUTO_RELOAD;
-	writel(tcon, &pwm->tcon);
-
-	tcon &= ~TCON_UPDATE(pwm_id);
-	writel(tcon, &pwm->tcon);
-
-	return 0;
-}
-
-int pwm_init(int pwm_id, int div, int invert)
-{
-	u32 val;
-	struct s5p_timer *const pwm = samsung_get_base_timer();
-	unsigned long ticks_per_period;
-	unsigned int offset, prescaler;
-
-	/*
-	 * Timer Freq(HZ) =
-	 *	PWM_CLK / { (prescaler_value + 1) * (divider_value) }
-	 */
-
-	val = readl(&pwm->tcfg0);
-	if (pwm_id < 2) {
-		prescaler = PRESCALER_0;
-		val &= ~0xff;
-		val |= (prescaler & 0xff);
-	} else {
-		prescaler = PRESCALER_1;
-		val &= ~(0xff << 8);
-		val |= (prescaler & 0xff) << 8;
-	}
-	writel(val, &pwm->tcfg0);
-	val = readl(&pwm->tcfg1);
-	val &= ~(0xf << MUX_DIV_SHIFT(pwm_id));
-	val |= (div & 0xf) << MUX_DIV_SHIFT(pwm_id);
-	writel(val, &pwm->tcfg1);
-
-
-	if (pwm_id == 4) {
-		/*
-		 * TODO(sjg): Use this as a countdown timer for now. We count
-		 * down from the maximum value to 0, then reset.
-		 */
-		ticks_per_period = -1UL;
-	} else {
-		const unsigned long pwm_hz = 1000;
-		unsigned long timer_rate_hz = clock_get_periph_rate(
-			PERIPH_ID_PWM0) / ((prescaler + 1) * (1 << div));
-
-		ticks_per_period = timer_rate_hz / pwm_hz;
-	}
-
-	/* set count value */
-	offset = pwm_id * 3;
-
-	writel(ticks_per_period, &pwm->tcntb0 + offset);
-
-	val = readl(&pwm->tcon) & ~(0xf << TCON_OFFSET(pwm_id));
-	if (invert && (pwm_id < 4))
-		val |= TCON_INVERTER(pwm_id);
-	writel(val, &pwm->tcon);
-
-	pwm_enable(pwm_id);
-
-	return 0;
-}