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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This code was left over from U-Boot and was superceded by the MCT.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>
This commit is contained in:
Gabe Black 2013-07-30 15:11:35 -07:00 committed by Patrick Georgi
parent 2c116febab
commit 9b764a0dcc
10 changed files with 33 additions and 363 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
src/cpu/samsung/exynos5250/Makefile.inc
View File

@ -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

16
src/cpu/samsung/exynos5250/clock.c
View File

@ -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;

2
src/cpu/samsung/exynos5250/cpu.h
View File

@ -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)

20
src/cpu/samsung/exynos5250/dp-reg.c
View File

@ -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");

11
src/cpu/samsung/exynos5250/fb.c
View File

@ -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 ");

1
src/cpu/samsung/exynos5250/monotonic_timer.c
View File

@ -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;
}

186
src/cpu/samsung/exynos5250/pwm.c
View File

@ -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;
}

70
src/cpu/samsung/exynos5250/pwm.h
View File

@ -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

62
src/cpu/samsung/exynos5250/timer.c
View File

@ -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);
}
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 */

25
src/cpu/samsung/exynos5250/timer.h
View File

@ -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