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Diffstat (limited to 'target/linux/s3c24xx/patches-2.6.24/1015-s3c2410-pwm.patch.patch')
-rw-r--r--target/linux/s3c24xx/patches-2.6.24/1015-s3c2410-pwm.patch.patch322
1 files changed, 322 insertions, 0 deletions
diff --git a/target/linux/s3c24xx/patches-2.6.24/1015-s3c2410-pwm.patch.patch b/target/linux/s3c24xx/patches-2.6.24/1015-s3c2410-pwm.patch.patch
new file mode 100644
index 0000000..a18a619
--- /dev/null
+++ b/target/linux/s3c24xx/patches-2.6.24/1015-s3c2410-pwm.patch.patch
@@ -0,0 +1,322 @@
+From e9db29d62cbcef7974099c3a4deac69ad2a72190 Mon Sep 17 00:00:00 2001
+From: mokopatches <mokopatches@openmoko.org>
+Date: Fri, 4 Apr 2008 11:31:44 +0100
+Subject: [PATCH] s3c2410-pwm.patch
+ This patch adds a PWM api abstraction for the S3C2410 SoC
+
+Signed-off-by: Javi Roman <javiroman@kernel-labs.org>
+Signed-off-by: Harald Welte <laforge@openmoko.org>
+---
+ arch/arm/mach-s3c2410/Kconfig | 6 +
+ arch/arm/mach-s3c2410/Makefile | 1 +
+ arch/arm/mach-s3c2410/pwm.c | 214 ++++++++++++++++++++++++++++++++++++
+ include/asm-arm/arch-s3c2410/pwm.h | 40 +++++++
+ 4 files changed, 261 insertions(+), 0 deletions(-)
+ create mode 100644 arch/arm/mach-s3c2410/pwm.c
+ create mode 100644 include/asm-arm/arch-s3c2410/pwm.h
+
+diff --git a/arch/arm/mach-s3c2410/Kconfig b/arch/arm/mach-s3c2410/Kconfig
+index ff339e1..e42195f 100644
+--- a/arch/arm/mach-s3c2410/Kconfig
++++ b/arch/arm/mach-s3c2410/Kconfig
+@@ -9,6 +9,7 @@ config CPU_S3C2410
+ depends on ARCH_S3C2410
+ select S3C2410_CLOCK
+ select S3C2410_GPIO
++ select S3C2410_PWM
+ select CPU_LLSERIAL_S3C2410
+ select S3C2410_PM if PM
+ help
+@@ -37,6 +38,11 @@ config S3C2410_CLOCK
+ help
+ Clock code for the S3C2410, and similar processors
+
++config S3C2410_PWM
++ bool
++ help
++ PWM timer code for the S3C2410, and similar processors
++
+
+ menu "S3C2410 Machines"
+
+diff --git a/arch/arm/mach-s3c2410/Makefile b/arch/arm/mach-s3c2410/Makefile
+index 8952a8d..bb577f4 100644
+--- a/arch/arm/mach-s3c2410/Makefile
++++ b/arch/arm/mach-s3c2410/Makefile
+@@ -16,6 +16,7 @@ obj-$(CONFIG_CPU_S3C2410_DMA) += dma.o
+ obj-$(CONFIG_S3C2410_PM) += pm.o sleep.o
+ obj-$(CONFIG_S3C2410_GPIO) += gpio.o
+ obj-$(CONFIG_S3C2410_CLOCK) += clock.o
++obj-$(CONFIG_S3C2410_PWM) += pwm.o
+
+ # Machine support
+
+diff --git a/arch/arm/mach-s3c2410/pwm.c b/arch/arm/mach-s3c2410/pwm.c
+new file mode 100644
+index 0000000..8a07359
+--- /dev/null
++++ b/arch/arm/mach-s3c2410/pwm.c
+@@ -0,0 +1,214 @@
++/*
++ * arch/arm/mach-s3c2410/3c2410-pwm.c
++ *
++ * Copyright (c) by Javi Roman <javiroman@kernel-labs.org>
++ * for the OpenMoko Project.
++ *
++ * S3C2410A SoC PWM support
++ *
++ * 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; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
++ *
++ */
++
++#include <linux/kernel.h>
++#include <linux/init.h>
++#include <linux/clk.h>
++#include <asm/hardware.h>
++#include <asm/plat-s3c/regs-timer.h>
++#include <asm/arch/pwm.h>
++
++int s3c2410_pwm_disable(struct s3c2410_pwm *pwm)
++{
++ unsigned long tcon;
++
++ /* stop timer */
++ tcon = __raw_readl(S3C2410_TCON);
++ tcon &= 0xffffff00;
++ __raw_writel(tcon, S3C2410_TCON);
++
++ clk_disable(pwm->pclk);
++ clk_put(pwm->pclk);
++
++ return 0;
++}
++EXPORT_SYMBOL_GPL(s3c2410_pwm_disable);
++
++int s3c2410_pwm_init(struct s3c2410_pwm *pwm)
++{
++ pwm->pclk = clk_get(NULL, "timers");
++ if (IS_ERR(pwm->pclk))
++ return PTR_ERR(pwm->pclk);
++
++ clk_enable(pwm->pclk);
++ pwm->pclk_rate = clk_get_rate(pwm->pclk);
++ return 0;
++}
++EXPORT_SYMBOL_GPL(s3c2410_pwm_init);
++
++int s3c2410_pwm_enable(struct s3c2410_pwm *pwm)
++{
++ unsigned long tcfg0, tcfg1, tcnt, tcmp;
++
++ /* control registers bits */
++ tcfg1 = __raw_readl(S3C2410_TCFG1);
++ tcfg0 = __raw_readl(S3C2410_TCFG0);
++
++ /* divider & scaler slection */
++ switch (pwm->timerid) {
++ case PWM0:
++ tcfg1 &= ~S3C2410_TCFG1_MUX0_MASK;
++ tcfg0 &= ~S3C2410_TCFG_PRESCALER0_MASK;
++ break;
++ case PWM1:
++ tcfg1 &= ~S3C2410_TCFG1_MUX1_MASK;
++ tcfg0 &= ~S3C2410_TCFG_PRESCALER0_MASK;
++ break;
++ case PWM2:
++ tcfg1 &= ~S3C2410_TCFG1_MUX2_MASK;
++ tcfg0 &= ~S3C2410_TCFG_PRESCALER1_MASK;
++ break;
++ case PWM3:
++ tcfg1 &= ~S3C2410_TCFG1_MUX3_MASK;
++ tcfg0 &= ~S3C2410_TCFG_PRESCALER1_MASK;
++ break;
++ case PWM4:
++ /* timer four is not capable of doing PWM */
++ break;
++ default:
++ clk_disable(pwm->pclk);
++ clk_put(pwm->pclk);
++ return -1;
++ }
++
++ /* divider & scaler values */
++ tcfg1 |= pwm->divider;
++ __raw_writel(tcfg1, S3C2410_TCFG1);
++
++ switch (pwm->timerid) {
++ case PWM0:
++ case PWM1:
++ tcfg0 |= pwm->prescaler;
++ __raw_writel(tcfg0, S3C2410_TCFG0);
++ break;
++ default:
++ if ((tcfg0 | pwm->prescaler) != tcfg0) {
++ printk(KERN_WARNING "not changing prescaler of PWM %u,"
++ " since it's shared with timer4 (clock tick)\n",
++ pwm->timerid);
++ }
++ break;
++ }
++
++ /* timer count and compare buffer initial values */
++ tcnt = pwm->counter;
++ tcmp = pwm->comparer;
++
++ __raw_writel(tcnt, S3C2410_TCNTB(pwm->timerid));
++ __raw_writel(tcmp, S3C2410_TCMPB(pwm->timerid));
++
++ /* ensure timer is stopped */
++ s3c2410_pwm_stop(pwm);
++
++ return 0;
++}
++EXPORT_SYMBOL_GPL(s3c2410_pwm_enable);
++
++int s3c2410_pwm_start(struct s3c2410_pwm *pwm)
++{
++ unsigned long tcon;
++
++ tcon = __raw_readl(S3C2410_TCON);
++
++ switch (pwm->timerid) {
++ case PWM0:
++ tcon |= S3C2410_TCON_T0START;
++ tcon &= ~S3C2410_TCON_T0MANUALUPD;
++ break;
++ case PWM1:
++ tcon |= S3C2410_TCON_T1START;
++ tcon &= ~S3C2410_TCON_T1MANUALUPD;
++ break;
++ case PWM2:
++ tcon |= S3C2410_TCON_T2START;
++ tcon &= ~S3C2410_TCON_T2MANUALUPD;
++ break;
++ case PWM3:
++ tcon |= S3C2410_TCON_T3START;
++ tcon &= ~S3C2410_TCON_T3MANUALUPD;
++ break;
++ case PWM4:
++ /* timer four is not capable of doing PWM */
++ default:
++ return -ENODEV;
++ }
++
++ __raw_writel(tcon, S3C2410_TCON);
++
++ return 0;
++}
++EXPORT_SYMBOL_GPL(s3c2410_pwm_start);
++
++int s3c2410_pwm_stop(struct s3c2410_pwm *pwm)
++{
++ unsigned long tcon;
++
++ tcon = __raw_readl(S3C2410_TCON);
++
++ switch (pwm->timerid) {
++ case PWM0:
++ tcon &= ~0x00000000;
++ tcon |= S3C2410_TCON_T0RELOAD;
++ tcon |= S3C2410_TCON_T0MANUALUPD;
++ break;
++ case PWM1:
++ tcon &= ~0x00000080;
++ tcon |= S3C2410_TCON_T1RELOAD;
++ tcon |= S3C2410_TCON_T1MANUALUPD;
++ break;
++ case PWM2:
++ tcon &= ~0x00000800;
++ tcon |= S3C2410_TCON_T2RELOAD;
++ tcon |= S3C2410_TCON_T2MANUALUPD;
++ break;
++ case PWM3:
++ tcon &= ~0x00008000;
++ tcon |= S3C2410_TCON_T3RELOAD;
++ tcon |= S3C2410_TCON_T3MANUALUPD;
++ break;
++ case PWM4:
++ /* timer four is not capable of doing PWM */
++ default:
++ return -ENODEV;
++ }
++
++ __raw_writel(tcon, S3C2410_TCON);
++
++ return 0;
++}
++EXPORT_SYMBOL_GPL(s3c2410_pwm_stop);
++
++int s3c2410_pwm_duty_cycle(int reg_value, struct s3c2410_pwm *pwm)
++{
++ __raw_writel(reg_value, S3C2410_TCMPB(pwm->timerid));
++
++ return 0;
++}
++EXPORT_SYMBOL_GPL(s3c2410_pwm_duty_cycle);
++
++int s3c2410_pwm_dumpregs(void)
++{
++ printk(KERN_INFO "TCON: %08lx, TCFG0: %08lx, TCFG1: %08lx\n",
++ (unsigned long) __raw_readl(S3C2410_TCON),
++ (unsigned long) __raw_readl(S3C2410_TCFG0),
++ (unsigned long) __raw_readl(S3C2410_TCFG1));
++
++ return 0;
++}
++EXPORT_SYMBOL_GPL(s3c2410_pwm_dumpregs);
+diff --git a/include/asm-arm/arch-s3c2410/pwm.h b/include/asm-arm/arch-s3c2410/pwm.h
+new file mode 100644
+index 0000000..a797ec3
+--- /dev/null
++++ b/include/asm-arm/arch-s3c2410/pwm.h
+@@ -0,0 +1,40 @@
++#ifndef __S3C2410_PWM_H
++#define __S3C2410_PWM_H
++
++#include <linux/err.h>
++#include <linux/platform_device.h>
++#include <linux/clk.h>
++
++#include <asm-arm/io.h>
++#include <asm/arch/hardware.h>
++#include <asm/mach-types.h>
++#include <asm/plat-s3c/regs-timer.h>
++#include <asm/arch/gta01.h>
++
++enum pwm_timer {
++ PWM0,
++ PWM1,
++ PWM2,
++ PWM3,
++ PWM4
++};
++
++struct s3c2410_pwm {
++ enum pwm_timer timerid;
++ struct clk *pclk;
++ unsigned long pclk_rate;
++ unsigned long prescaler;
++ unsigned long divider;
++ unsigned long counter;
++ unsigned long comparer;
++};
++
++int s3c2410_pwm_init(struct s3c2410_pwm *s3c2410_pwm);
++int s3c2410_pwm_enable(struct s3c2410_pwm *s3c2410_pwm);
++int s3c2410_pwm_disable(struct s3c2410_pwm *s3c2410_pwm);
++int s3c2410_pwm_start(struct s3c2410_pwm *s3c2410_pwm);
++int s3c2410_pwm_stop(struct s3c2410_pwm *s3c2410_pwm);
++int s3c2410_pwm_duty_cycle(int reg_value, struct s3c2410_pwm *s3c2410_pwm);
++int s3c2410_pwm_dumpregs(void);
++
++#endif /* __S3C2410_PWM_H */
+--
+1.5.6.5
+
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