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authorGabe Black <gabeblack@google.com>2013-07-30 15:11:35 -0700
committerPatrick Georgi <patrick@georgi-clan.de>2013-12-21 10:48:49 +0100
commit9b764a0dcc67a7bbf6e74b35cdd9e3e7c6d59c83 (patch)
treebcc96fbc83db41a0770d5e455b716bf0025d31e3 /src/cpu/samsung/exynos5250
parent2c116febabe3619933d361ca4289df899ec83e3d (diff)
downloadcoreboot-9b764a0dcc67a7bbf6e74b35cdd9e3e7c6d59c83.tar.xz
exynos5250: Get rid of the PWM timer code we shouldn't be using anymore
This code was left over from U-Boot and was superceded by the MCT. Change-Id: Ia85e3b7281dcdd4740238dddd0dfc6f0ba2c94da Signed-off-by: Gabe Black <gabeblack@google.com> Reviewed-on: https://gerrit.chromium.org/gerrit/63778 Commit-Queue: Gabe Black <gabeblack@chromium.org> Reviewed-by: Gabe Black <gabeblack@chromium.org> Tested-by: Gabe Black <gabeblack@chromium.org> Reviewed-on: http://review.coreboot.org/4401 Tested-by: build bot (Jenkins) Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
Diffstat (limited to 'src/cpu/samsung/exynos5250')
-rw-r--r--src/cpu/samsung/exynos5250/Makefile.inc3
-rw-r--r--src/cpu/samsung/exynos5250/clock.c16
-rw-r--r--src/cpu/samsung/exynos5250/cpu.h2
-rw-r--r--src/cpu/samsung/exynos5250/dp-reg.c20
-rw-r--r--src/cpu/samsung/exynos5250/fb.c11
-rw-r--r--src/cpu/samsung/exynos5250/monotonic_timer.c1
-rw-r--r--src/cpu/samsung/exynos5250/pwm.c186
-rw-r--r--src/cpu/samsung/exynos5250/pwm.h70
-rw-r--r--src/cpu/samsung/exynos5250/timer.c62
-rw-r--r--src/cpu/samsung/exynos5250/timer.h25
10 files changed, 33 insertions, 363 deletions
diff --git a/src/cpu/samsung/exynos5250/Makefile.inc b/src/cpu/samsung/exynos5250/Makefile.inc
index 73fd3c5a4c..9b346c6ca3 100644
--- a/src/cpu/samsung/exynos5250/Makefile.inc
+++ b/src/cpu/samsung/exynos5250/Makefile.inc
@@ -14,7 +14,6 @@ bootblock-$(CONFIG_BOOTBLOCK_CONSOLE) += uart.c
endif
bootblock-y += wakeup.c
bootblock-y += gpio.c
-bootblock-$(CONFIG_BOOTBLOCK_CONSOLE) += pwm.c
bootblock-$(CONFIG_BOOTBLOCK_CONSOLE) += timer.c
romstage-y += spi.c
@@ -30,7 +29,6 @@ ifeq ($(CONFIG_CONSOLE_SERIAL_UART),y)
romstage-$(CONFIG_EARLY_CONSOLE) += uart.c
endif
romstage-y += wakeup.c
-romstage-y += pwm.c # needed by timer.c
romstage-y += gpio.c
romstage-y += timer.c
romstage-y += i2c.c
@@ -46,7 +44,6 @@ ramstage-y += cpu.c
ramstage-y += tmu.c
ramstage-y += mct.c
ramstage-y += monotonic_timer.c
-ramstage-y += pwm.c # needed by timer.c
ramstage-y += timer.c
ramstage-y += gpio.c
ramstage-y += i2c.c
diff --git a/src/cpu/samsung/exynos5250/clock.c b/src/cpu/samsung/exynos5250/clock.c
index 390fae30f6..a89ceb393a 100644
--- a/src/cpu/samsung/exynos5250/clock.c
+++ b/src/cpu/samsung/exynos5250/clock.c
@@ -610,9 +610,8 @@ int clock_epll_set_rate(unsigned long rate)
unsigned int epll_con, epll_con_k;
unsigned int i;
unsigned int lockcnt;
- unsigned int start;
- struct exynos5_clock *clk =
- samsung_get_base_clock();
+ struct mono_time current, end;
+ struct exynos5_clock *clk = samsung_get_base_clock();
epll_con = readl(&clk->epll_con0);
epll_con &= ~((EPLL_CON0_LOCK_DET_EN_MASK <<
@@ -646,14 +645,19 @@ int clock_epll_set_rate(unsigned long rate)
writel(epll_con, &clk->epll_con0);
writel(epll_con_k, &clk->epll_con1);
- start = get_timer(0);
+ timer_monotonic_get(&current);
+ end = current;
+ mono_time_add_msecs(&end, TIMEOUT_EPLL_LOCK);
while (!(readl(&clk->epll_con0) &
(0x1 << EXYNOS5_EPLLCON0_LOCKED_SHIFT))) {
- if (get_timer(start) > TIMEOUT_EPLL_LOCK) {
- printk(BIOS_DEBUG, "%s: Timeout waiting for EPLL lock\n", __func__);
+ if (mono_time_after(&current, &end)) {
+ printk(BIOS_DEBUG,
+ "%s: Timeout waiting for EPLL lock\n",
+ __func__);
return -1;
}
+ timer_monotonic_get(&current);
}
return 0;
diff --git a/src/cpu/samsung/exynos5250/cpu.h b/src/cpu/samsung/exynos5250/cpu.h
index 63f17e28af..7b12c945d2 100644
--- a/src/cpu/samsung/exynos5250/cpu.h
+++ b/src/cpu/samsung/exynos5250/cpu.h
@@ -73,7 +73,6 @@
#define EXYNOS5_SPI1_BASE 0x12D30000
#define EXYNOS5_I2C_BASE 0x12C60000
#define EXYNOS5_SPI_BASE 0x12D20000
-#define EXYNOS5_PWMTIMER_BASE 0x12DD0000
#define EXYNOS5_SPI_ISP_BASE 0x131A0000
#define EXYNOS5_I2S_BASE 0x12D60000
#define EXYNOS5_GPIO_PART3_BASE 0x13400000 /* E00..H17 */
@@ -108,7 +107,6 @@
#define samsung_get_base_sromc() ((struct exynos5_sromc *)EXYNOS5_SROMC_BASE)
#define samsung_get_base_swreset() ((struct exynos5_swreset *)EXYNOS5_SWRESET)
#define samsung_get_base_sysreg() ((struct exynos5_sysreg *)EXYNOS5_SYSREG_BASE)
-#define samsung_get_base_timer() ((struct s5p_timer *)EXYNOS5_PWMTIMER_BASE)
#define samsung_get_base_uart() ((struct exynos5_uart *)EXYNOS5_UART_BASE)
#define samsung_get_base_usb_phy() ((struct exynos5_usb_phy *)EXYNOS5_USBPHY_BASE)
#define samsung_get_base_usb_otg() ((struct exynos5_usb_otg *)EXYNOS5_USBOTG_BASE)
diff --git a/src/cpu/samsung/exynos5250/dp-reg.c b/src/cpu/samsung/exynos5250/dp-reg.c
index ac4208d159..1cc70887ce 100644
--- a/src/cpu/samsung/exynos5250/dp-reg.c
+++ b/src/cpu/samsung/exynos5250/dp-reg.c
@@ -120,7 +120,7 @@ unsigned int s5p_dp_get_pll_lock_status(struct s5p_dp_device *dp)
int s5p_dp_init_analog_func(struct s5p_dp_device *dp)
{
u32 reg;
- u32 start;
+ struct mono_time current, end;
struct exynos5_dp *base = dp->base;
writel(0x00, &base->dp_phy_pd);
@@ -135,13 +135,17 @@ int s5p_dp_init_analog_func(struct s5p_dp_device *dp)
clrbits_le32(&base->dp_pll_ctl, DP_PLL_PD);
- start = get_timer(0);
+ timer_monotonic_get(&current);
+ end = current;
+ mono_time_add_msecs(&end, PLL_LOCK_TIMEOUT);
+
while (s5p_dp_get_pll_lock_status(dp) == PLL_UNLOCKED) {
- if (get_timer(start) > PLL_LOCK_TIMEOUT) {
+ if (mono_time_after(&current, &end)) {
printk(BIOS_ERR, "%s: PLL is not locked\n",
__func__);
return -1;
}
+ timer_monotonic_get(&current);
}
}
@@ -431,11 +435,14 @@ void s5p_dp_enable_video_master(struct s5p_dp_device *dp)
int s5p_dp_is_video_stream_on(struct s5p_dp_device *dp)
{
u32 reg, i = 0;
- u32 start;
+ struct mono_time current, end;
struct exynos5_dp *base = dp->base;
/* Wait for 4 VSYNC_DET interrupts */
- start = get_timer(0);
+ timer_monotonic_get(&current);
+ end = current;
+ mono_time_add_msecs(&end, STREAM_ON_TIMEOUT);
+
do {
reg = readl(&base->common_int_sta_1);
if (reg & VSYNC_DET) {
@@ -444,7 +451,8 @@ int s5p_dp_is_video_stream_on(struct s5p_dp_device *dp)
}
if (i == 4)
break;
- } while (get_timer(start) <= STREAM_ON_TIMEOUT);
+ timer_monotonic_get(&current);
+ } while (mono_time_before(&current, &end));
if (i != 4) {
printk(BIOS_DEBUG, "s5p_dp_is_video_stream_on timeout\n");
diff --git a/src/cpu/samsung/exynos5250/fb.c b/src/cpu/samsung/exynos5250/fb.c
index 760f5ee4bf..3724a247c6 100644
--- a/src/cpu/samsung/exynos5250/fb.c
+++ b/src/cpu/samsung/exynos5250/fb.c
@@ -26,7 +26,6 @@
#include <timer.h>
#include <delay.h>
#include <console/console.h>
-#include "timer.h"
#include "cpu.h"
#include "power.h"
#include "sysreg.h"
@@ -411,20 +410,24 @@ static int s5p_dp_hw_link_training(struct s5p_dp_device *dp,
{
int pll_is_locked = 0;
u32 data;
- u32 start;
int lane;
+ struct mono_time current, end;
struct exynos5_dp *base = dp->base;
/* Stop Video */
clrbits_le32(&base->video_ctl_1, VIDEO_EN);
- start = get_timer(0);
+ timer_monotonic_get(&current);
+ end = current;
+ mono_time_add_msecs(&end, PLL_LOCK_TIMEOUT);
+
while ((pll_is_locked = s5p_dp_get_pll_lock_status(dp)) == PLL_UNLOCKED) {
- if (get_timer(start) > PLL_LOCK_TIMEOUT) {
+ if (mono_time_after(&current, &end)) {
/* Ignore this error, and try to continue */
printk(BIOS_ERR, "PLL is not locked yet.\n");
break;
}
+ timer_monotonic_get(&current);
}
printk(BIOS_SPEW, "PLL is %slocked\n",
pll_is_locked == PLL_LOCKED ? "": "not ");
diff --git a/src/cpu/samsung/exynos5250/monotonic_timer.c b/src/cpu/samsung/exynos5250/monotonic_timer.c
index 6350af536f..d46d02a8d3 100644
--- a/src/cpu/samsung/exynos5250/monotonic_timer.c
+++ b/src/cpu/samsung/exynos5250/monotonic_timer.c
@@ -37,7 +37,6 @@ void timer_monotonic_get(struct mono_time *mt)
uint64_t usecs_elapsed;
if (!mono_counter.initialized) {
- init_timer();
mono_counter.last_value = mct_raw_value();
mono_counter.initialized = 1;
}
diff --git a/src/cpu/samsung/exynos5250/pwm.c b/src/cpu/samsung/exynos5250/pwm.c
deleted file mode 100644
index eeb67211c6..0000000000
--- a/src/cpu/samsung/exynos5250/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 *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;
-}
diff --git a/src/cpu/samsung/exynos5250/pwm.h b/src/cpu/samsung/exynos5250/pwm.h
deleted file mode 100644
index 948bb6d0a8..0000000000
--- a/src/cpu/samsung/exynos5250/pwm.h
+++ /dev/null
@@ -1,70 +0,0 @@
-/*
- * This file is part of the coreboot project.
- *
- * Copyright (C) 2009 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
- */
-
-#ifndef CPU_SAMSUNG_EXYNOS5250_PWM_H
-#define CPU_SAMSUNG_EXYNOS5250_PWM_H
-
-#define PRESCALER_0 (8 - 1) /* prescaler of timer 0, 1 */
-#define PRESCALER_1 (16 - 1) /* prescaler of timer 2, 3, 4 */
-
-/* Divider MUX */
-#define MUX_DIV_1 0 /* 1/1 period */
-#define MUX_DIV_2 1 /* 1/2 period */
-#define MUX_DIV_4 2 /* 1/4 period */
-#define MUX_DIV_8 3 /* 1/8 period */
-#define MUX_DIV_16 4 /* 1/16 period */
-
-#define MUX_DIV_SHIFT(x) (x * 4)
-
-#define TCON_OFFSET(x) ((x + 1) * (!!x) << 2)
-
-#define TCON_START(x) (1 << TCON_OFFSET(x))
-#define TCON_UPDATE(x) (1 << (TCON_OFFSET(x) + 1))
-#define TCON_INVERTER(x) (1 << (TCON_OFFSET(x) + 2))
-#define TCON_AUTO_RELOAD(x) (1 << (TCON_OFFSET(x) + 3))
-#define TCON4_AUTO_RELOAD (1 << 22)
-
-struct s5p_timer {
- unsigned int tcfg0;
- unsigned int tcfg1;
- unsigned int tcon;
- unsigned int tcntb0;
- unsigned int tcmpb0;
- unsigned int tcnto0;
- unsigned int tcntb1;
- unsigned int tcmpb1;
- unsigned int tcnto1;
- unsigned int tcntb2;
- unsigned int tcmpb2;
- unsigned int tcnto2;
- unsigned int tcntb3;
- unsigned int tcmpb3;
- unsigned int tcnto3;
- unsigned int tcntb4;
- unsigned int tcnto4;
- unsigned int tintcstat;
-};
-
-int pwm_config(int pwm_id, int duty_ns, int period_ns);
-int pwm_check_enabled(int pwm_id);
-void pwm_disable(int pwm_id);
-int pwm_enable(int pwm_id);
-int pwm_init(int pwm_id, int div, int invert);
-
-#endif
diff --git a/src/cpu/samsung/exynos5250/timer.c b/src/cpu/samsung/exynos5250/timer.c
index 405effac5b..0c2e64143c 100644
--- a/src/cpu/samsung/exynos5250/timer.c
+++ b/src/cpu/samsung/exynos5250/timer.c
@@ -18,72 +18,14 @@
*/
#include <console/console.h>
-#include <arch/io.h>
#include <timer.h>
#include <delay.h>
-#include "timer.h"
-#include "pwm.h"
-#include "clk.h"
-#include "cpu.h"
-
-static unsigned long long timer_reset_value;
-static unsigned long lastinc;
-
-/* macro to read the 16 bit timer */
-static inline struct s5p_timer *s5p_get_base_timer(void)
-{
- return samsung_get_base_timer();
-}
-/**
- * Read the countdown timer.
- *
- * This operates at 1MHz and counts downwards. It will wrap about every
- * hour (2^32 microseconds).
- *
- * @return current value of timer
- */
-static unsigned long timer_get_us_down(void)
-{
- struct s5p_timer *const timer = s5p_get_base_timer();
-
- return readl(&timer->tcnto4);
-}
+#include "clk.h"
void init_timer(void)
{
- /* Timer may have been enabled in SPL */
- if (!pwm_check_enabled(4)) {
- /* PWM Timer 4 */
- pwm_init(4, MUX_DIV_4, 0);
- pwm_config(4, 100000, 100000);
- pwm_enable(4);
-
- /* Use this as the current monotonic time in us */
- timer_reset_value = 0;
-
- /* Use this as the last timer value we saw */
- lastinc = timer_get_us_down();
- }
-}
-
-/*
- * timer without interrupts
- */
-unsigned long get_timer(unsigned long base)
-{
- unsigned long now = timer_get_us_down();
-
- /*
- * Increment the time by the amount elapsed since the last read.
- * The timer may have wrapped around, but it makes no difference to
- * our arithmetic here.
- */
- timer_reset_value += lastinc - now;
- lastinc = now;
-
- /* Divide by 1000 to convert from us to ms */
- return timer_reset_value / 1000 - base;
+ mct_start();
}
/* delay x useconds */
diff --git a/src/cpu/samsung/exynos5250/timer.h b/src/cpu/samsung/exynos5250/timer.h
deleted file mode 100644
index 100c500980..0000000000
--- a/src/cpu/samsung/exynos5250/timer.h
+++ /dev/null
@@ -1,25 +0,0 @@
-/*
- * This file is part of the coreboot project.
- *
- * Copyright 2013 Google Inc.
- *
- * 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
- */
-
-#ifndef CPU_SAMSUNG_EXYNOS5250_TIMER_H
-#define CPU_SAMSUNG_EXYNOS5250_TIMER_H
-
-unsigned long get_timer(unsigned long base);
-
-#endif