diff options
Diffstat (limited to 'target/linux/s3c24xx/patches/0011-s3c2410-pwm.patch.patch')
| -rwxr-xr-x | target/linux/s3c24xx/patches/0011-s3c2410-pwm.patch.patch | 323 |
1 files changed, 323 insertions, 0 deletions
diff --git a/target/linux/s3c24xx/patches/0011-s3c2410-pwm.patch.patch b/target/linux/s3c24xx/patches/0011-s3c2410-pwm.patch.patch new file mode 100755 index 0000000000..2a22040e71 --- /dev/null +++ b/target/linux/s3c24xx/patches/0011-s3c2410-pwm.patch.patch @@ -0,0 +1,323 @@ +From 2b1ccb68bdc0e1454be0e769896862bf0c7f95f9 Mon Sep 17 00:00:00 2001 +From: mokopatches <mokopatches@openmoko.org> +Date: Wed, 16 Jul 2008 14:44:49 +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 | 7 + + arch/arm/mach-s3c2410/Makefile | 1 + + arch/arm/mach-s3c2410/pwm.c | 214 ++++++++++++++++++++++++++++++++++++ + include/asm-arm/arch-s3c2410/pwm.h | 40 +++++++ + 4 files changed, 262 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 58519e6..3e9ec50 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 +@@ -38,6 +39,12 @@ config S3C2410_CLOCK + 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" + + config ARCH_SMDK2410 +diff --git a/arch/arm/mach-s3c2410/Makefile b/arch/arm/mach-s3c2410/Makefile +index b73562f..2a12a6a 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 */ +-- +1.5.6.3 + |