diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/mach-omap2/Kconfig | 1 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/timer-gp.c | 86 | ||||
| -rw-r--r-- | arch/arm/plat-omap/Kconfig | 2 | ||||
| -rw-r--r-- | arch/arm/plat-omap/dmtimer.c | 413 | ||||
| -rw-r--r-- | arch/arm/plat-omap/timer32k.c | 121 |
5 files changed, 367 insertions, 256 deletions
diff --git a/arch/arm/mach-omap2/Kconfig b/arch/arm/mach-omap2/Kconfig index 537dd2e6d38..aab97ccf1e6 100644 --- a/arch/arm/mach-omap2/Kconfig +++ b/arch/arm/mach-omap2/Kconfig @@ -8,6 +8,7 @@ config ARCH_OMAP24XX config ARCH_OMAP2420 bool "OMAP2420 support" depends on ARCH_OMAP24XX + select OMAP_DM_TIMER comment "OMAP Board Type" depends on ARCH_OMAP2 diff --git a/arch/arm/mach-omap2/timer-gp.c b/arch/arm/mach-omap2/timer-gp.c index 1d2f5ac2f69..3358c0d47b1 100644 --- a/arch/arm/mach-omap2/timer-gp.c +++ b/arch/arm/mach-omap2/timer-gp.c @@ -6,6 +6,7 @@ * Copyright (C) 2005 Nokia Corporation * Author: Paul Mundt <paul.mundt@nokia.com> * Juha Yrjölä <juha.yrjola@nokia.com> + * OMAP Dual-mode timer framework support by Timo Teras * * Some parts based off of TI's 24xx code: * @@ -22,54 +23,18 @@ #include <linux/interrupt.h> #include <linux/err.h> #include <linux/clk.h> +#include <linux/delay.h> #include <asm/mach/time.h> -#include <asm/delay.h> -#include <asm/io.h> +#include <asm/arch/dmtimer.h> -#define OMAP2_GP_TIMER1_BASE 0x48028000 -#define OMAP2_GP_TIMER2_BASE 0x4802a000 -#define OMAP2_GP_TIMER3_BASE 0x48078000 -#define OMAP2_GP_TIMER4_BASE 0x4807a000 +static struct omap_dm_timer *gptimer; -#define GP_TIMER_TIDR 0x00 -#define GP_TIMER_TISR 0x18 -#define GP_TIMER_TIER 0x1c -#define GP_TIMER_TCLR 0x24 -#define GP_TIMER_TCRR 0x28 -#define GP_TIMER_TLDR 0x2c -#define GP_TIMER_TSICR 0x40 - -#define OS_TIMER_NR 1 /* GP timer 2 */ - -static unsigned long timer_base[] = { - IO_ADDRESS(OMAP2_GP_TIMER1_BASE), - IO_ADDRESS(OMAP2_GP_TIMER2_BASE), - IO_ADDRESS(OMAP2_GP_TIMER3_BASE), - IO_ADDRESS(OMAP2_GP_TIMER4_BASE), -}; - -static inline unsigned int timer_read_reg(int nr, unsigned int reg) -{ - return __raw_readl(timer_base[nr] + reg); -} - -static inline void timer_write_reg(int nr, unsigned int reg, unsigned int val) -{ - __raw_writel(val, timer_base[nr] + reg); -} - -/* Note that we always enable the clock prescale divider bit */ -static inline void omap2_gp_timer_start(int nr, unsigned long load_val) +static inline void omap2_gp_timer_start(unsigned long load_val) { - unsigned int tmp; - - tmp = 0xffffffff - load_val; - - timer_write_reg(nr, GP_TIMER_TLDR, tmp); - timer_write_reg(nr, GP_TIMER_TCRR, tmp); - timer_write_reg(nr, GP_TIMER_TIER, 1 << 1); - timer_write_reg(nr, GP_TIMER_TCLR, (1 << 5) | (1 << 1) | 1); + omap_dm_timer_set_load(gptimer, 1, 0xffffffff - load_val); + omap_dm_timer_set_int_enable(gptimer, OMAP_TIMER_INT_OVERFLOW); + omap_dm_timer_start(gptimer); } static irqreturn_t omap2_gp_timer_interrupt(int irq, void *dev_id, @@ -77,7 +42,7 @@ static irqreturn_t omap2_gp_timer_interrupt(int irq, void *dev_id, { write_seqlock(&xtime_lock); - timer_write_reg(OS_TIMER_NR, GP_TIMER_TISR, 1 << 1); + omap_dm_timer_write_status(gptimer, OMAP_TIMER_INT_OVERFLOW); timer_tick(regs); write_sequnlock(&xtime_lock); @@ -87,41 +52,26 @@ static irqreturn_t omap2_gp_timer_interrupt(int irq, void *dev_id, static struct irqaction omap2_gp_timer_irq = { .name = "gp timer", - .flags = SA_INTERRUPT, + .flags = SA_INTERRUPT | SA_TIMER, .handler = omap2_gp_timer_interrupt, }; static void __init omap2_gp_timer_init(void) { - struct clk * sys_ck; - u32 tick_period = 120000; - u32 l; + u32 tick_period; - /* Reset clock and prescale value */ - timer_write_reg(OS_TIMER_NR, GP_TIMER_TCLR, 0); + omap_dm_timer_init(); + gptimer = omap_dm_timer_request_specific(2); + BUG_ON(gptimer == NULL); - sys_ck = clk_get(NULL, "sys_ck"); - if (IS_ERR(sys_ck)) - printk(KERN_ERR "Could not get sys_ck\n"); - else { - clk_enable(sys_ck); - tick_period = clk_get_rate(sys_ck) / 100; - clk_put(sys_ck); - } - - tick_period /= 2; /* Minimum prescale divider is 2 */ + omap_dm_timer_set_source(gptimer, OMAP_TIMER_SRC_SYS_CLK); + tick_period = clk_get_rate(omap_dm_timer_get_fclk(gptimer)) / 100; tick_period -= 1; - l = timer_read_reg(OS_TIMER_NR, GP_TIMER_TIDR); - printk(KERN_INFO "OMAP2 GP timer (HW version %d.%d)\n", - (l >> 4) & 0x0f, l & 0x0f); - - setup_irq(38, &omap2_gp_timer_irq); - - omap2_gp_timer_start(OS_TIMER_NR, tick_period); + setup_irq(omap_dm_timer_get_irq(gptimer), &omap2_gp_timer_irq); + omap2_gp_timer_start(tick_period); } struct sys_timer omap_timer = { .init = omap2_gp_timer_init, }; - diff --git a/arch/arm/plat-omap/Kconfig b/arch/arm/plat-omap/Kconfig index ec49495e651..ec752e16d61 100644 --- a/arch/arm/plat-omap/Kconfig +++ b/arch/arm/plat-omap/Kconfig @@ -91,7 +91,7 @@ config OMAP_32K_TIMER_HZ config OMAP_DM_TIMER bool "Use dual-mode timer" - depends on ARCH_OMAP16XX + depends on ARCH_OMAP16XX || ARCH_OMAP24XX help Select this option if you want to use OMAP Dual-Mode timers. diff --git a/arch/arm/plat-omap/dmtimer.c b/arch/arm/plat-omap/dmtimer.c index eba3cb52ad8..c25a1a6d2b0 100644 --- a/arch/arm/plat-omap/dmtimer.c +++ b/arch/arm/plat-omap/dmtimer.c @@ -4,7 +4,8 @@ * OMAP Dual-Mode Timers * * Copyright (C) 2005 Nokia Corporation - * Author: Lauri Leukkunen <lauri.leukkunen@nokia.com> + * OMAP2 support by Juha Yrjola + * API improvements and OMAP2 clock framework support by Timo Teras * * 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 @@ -26,15 +27,17 @@ */ #include <linux/init.h> +#include <linux/spinlock.h> +#include <linux/errno.h> +#include <linux/list.h> +#include <linux/clk.h> +#include <linux/delay.h> #include <asm/hardware.h> #include <asm/arch/dmtimer.h> #include <asm/io.h> #include <asm/arch/irqs.h> -#include <linux/spinlock.h> -#include <linux/list.h> - -#define OMAP_TIMER_COUNT 8 +/* register offsets */ #define OMAP_TIMER_ID_REG 0x00 #define OMAP_TIMER_OCP_CFG_REG 0x10 #define OMAP_TIMER_SYS_STAT_REG 0x14 @@ -50,52 +53,184 @@ #define OMAP_TIMER_CAPTURE_REG 0x3c #define OMAP_TIMER_IF_CTRL_REG 0x40 +/* timer control reg bits */ +#define OMAP_TIMER_CTRL_GPOCFG (1 << 14) +#define OMAP_TIMER_CTRL_CAPTMODE (1 << 13) +#define OMAP_TIMER_CTRL_PT (1 << 12) +#define OMAP_TIMER_CTRL_TCM_LOWTOHIGH (0x1 << 8) +#define OMAP_TIMER_CTRL_TCM_HIGHTOLOW (0x2 << 8) +#define OMAP_TIMER_CTRL_TCM_BOTHEDGES (0x3 << 8) +#define OMAP_TIMER_CTRL_SCPWM (1 << 7) +#define OMAP_TIMER_CTRL_CE (1 << 6) /* compare enable */ +#define OMAP_TIMER_CTRL_PRE (1 << 5) /* prescaler enable */ +#define OMAP_TIMER_CTRL_PTV_SHIFT 2 /* how much to shift the prescaler value */ +#define OMAP_TIMER_CTRL_AR (1 << 1) /* auto-reload enable */ +#define OMAP_TIMER_CTRL_ST (1 << 0) /* start timer */ + +struct omap_dm_timer { + unsigned long phys_base; + int irq; +#ifdef CONFIG_ARCH_OMAP2 + struct clk *iclk, *fclk; +#endif + void __iomem *io_base; + unsigned reserved:1; +}; + +#ifdef CONFIG_ARCH_OMAP1 + +static struct omap_dm_timer dm_timers[] = { + { .phys_base = 0xfffb1400, .irq = INT_1610_GPTIMER1 }, + { .phys_base = 0xfffb1c00, .irq = INT_1610_GPTIMER2 }, + { .phys_base = 0xfffb2400, .irq = INT_1610_GPTIMER3 }, + { .phys_base = 0xfffb2c00, .irq = INT_1610_GPTIMER4 }, + { .phys_base = 0xfffb3400, .irq = INT_1610_GPTIMER5 }, + { .phys_base = 0xfffb3c00, .irq = INT_1610_GPTIMER6 }, + { .phys_base = 0xfffb4400, .irq = INT_1610_GPTIMER7 }, + { .phys_base = 0xfffb4c00, .irq = INT_1610_GPTIMER8 }, +}; -static struct dmtimer_info_struct { - struct list_head unused_timers; - struct list_head reserved_timers; -} dm_timer_info; +#elif defined(CONFIG_ARCH_OMAP2) static struct omap_dm_timer dm_timers[] = { - { .base=0xfffb1400, .irq=INT_1610_GPTIMER1 }, - { .base=0xfffb1c00, .irq=INT_1610_GPTIMER2 }, - { .base=0xfffb2400, .irq=INT_1610_GPTIMER3 }, - { .base=0xfffb2c00, .irq=INT_1610_GPTIMER4 }, - { .base=0xfffb3400, .irq=INT_1610_GPTIMER5 }, - { .base=0xfffb3c00, .irq=INT_1610_GPTIMER6 }, - { .base=0xfffb4400, .irq=INT_1610_GPTIMER7 }, - { .base=0xfffb4c00, .irq=INT_1610_GPTIMER8 }, - { .base=0x0 }, + { .phys_base = 0x48028000, .irq = INT_24XX_GPTIMER1 }, + { .phys_base = 0x4802a000, .irq = INT_24XX_GPTIMER2 }, + { .phys_base = 0x48078000, .irq = INT_24XX_GPTIMER3 }, + { .phys_base = 0x4807a000, .irq = INT_24XX_GPTIMER4 }, + { .phys_base = 0x4807c000, .irq = INT_24XX_GPTIMER5 }, + { .phys_base = 0x4807e000, .irq = INT_24XX_GPTIMER6 }, + { .phys_base = 0x48080000, .irq = INT_24XX_GPTIMER7 }, + { .phys_base = 0x48082000, .irq = INT_24XX_GPTIMER8 }, + { .phys_base = 0x48084000, .irq = INT_24XX_GPTIMER9 }, + { .phys_base = 0x48086000, .irq = INT_24XX_GPTIMER10 }, + { .phys_base = 0x48088000, .irq = INT_24XX_GPTIMER11 }, + { .phys_base = 0x4808a000, .irq = INT_24XX_GPTIMER12 }, }; +#else + +#error OMAP architecture not supported! + +#endif + +static const int dm_timer_count = ARRAY_SIZE(dm_timers); static spinlock_t dm_timer_lock; +static inline u32 omap_dm_timer_read_reg(struct omap_dm_timer *timer, int reg) +{ + return readl(timer->io_base + reg); +} -inline void omap_dm_timer_write_reg(struct omap_dm_timer *timer, int reg, u32 value) +static void omap_dm_timer_write_reg(struct omap_dm_timer *timer, int reg, u32 value) { - omap_writel(value, timer->base + reg); + writel(value, timer->io_base + reg); while (omap_dm_timer_read_reg(timer, OMAP_TIMER_WRITE_PEND_REG)) ; } -u32 omap_dm_timer_read_reg(struct omap_dm_timer *timer, int reg) +static void omap_dm_timer_wait_for_reset(struct omap_dm_timer *timer) { - return omap_readl(timer->base + reg); + int c; + + c = 0; + while (!(omap_dm_timer_read_reg(timer, OMAP_TIMER_SYS_STAT_REG) & 1)) { + c++; + if (c > 100000) { + printk(KERN_ERR "Timer failed to reset\n"); + return; + } + } } -int omap_dm_timers_active(void) +static void omap_dm_timer_reset(struct omap_dm_timer *timer) +{ + u32 l; + + omap_dm_timer_write_reg(timer, OMAP_TIMER_IF_CTRL_REG, 0x06); + omap_dm_timer_wait_for_reset(timer); + + omap_dm_timer_set_source(timer, OMAP_TIMER_SRC_SYS_CLK); + + /* Set to smart-idle mode */ + l = omap_dm_timer_read_reg(timer, OMAP_TIMER_OCP_CFG_REG); + l |= 0x02 << 3; + omap_dm_timer_write_reg(timer, OMAP_TIMER_OCP_CFG_REG, l); +} + +static void omap_dm_timer_reserve(struct omap_dm_timer *timer) +{ + timer->reserved = 1; +#ifdef CONFIG_ARCH_OMAP2 + clk_enable(timer->iclk); + clk_enable(timer->fclk); +#endif + omap_dm_timer_reset(timer); +} + +struct omap_dm_timer *omap_dm_timer_request(void) +{ + struct omap_dm_timer *timer = NULL; + unsigned long flags; + int i; + + spin_lock_irqsave(&dm_timer_lock, flags); + for (i = 0; i < dm_timer_count; i++) { + if (dm_timers[i].reserved) + continue; + + timer = &dm_timers[i]; + omap_dm_timer_reserve(timer); + break; + } + spin_unlock_irqrestore(&dm_timer_lock, flags); + + return timer; +} + +struct omap_dm_timer *omap_dm_timer_request_specific(int id) { struct omap_dm_timer *timer; + unsigned long flags; - for (timer = &dm_timers[0]; timer->base; ++timer) - if (omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG) & - OMAP_TIMER_CTRL_ST) - return 1; + spin_lock_irqsave(&dm_timer_lock, flags); + if (id <= 0 || id > dm_timer_count || dm_timers[id-1].reserved) { + spin_unlock_irqrestore(&dm_timer_lock, flags); + printk("BUG: warning at %s:%d/%s(): unable to get timer %d\n", + __FILE__, __LINE__, __FUNCTION__, id); + dump_stack(); + return NULL; + } - return 0; + timer = &dm_timers[id-1]; + omap_dm_timer_reserve(timer); + spin_unlock_irqrestore(&dm_timer_lock, flags); + + return timer; } +void omap_dm_timer_free(struct omap_dm_timer *timer) +{ + omap_dm_timer_reset(timer); +#ifdef CONFIG_ARCH_OMAP2 + clk_disable(timer->iclk); + clk_disable(timer->fclk); +#endif + WARN_ON(!timer->reserved); + timer->reserved = 0; +} + +int omap_dm_timer_get_irq(struct omap_dm_timer *timer) +{ + return timer->irq; +} + +#if defined(CONFIG_ARCH_OMAP1) + +struct clk *omap_dm_timer_get_fclk(struct omap_dm_timer *timer) +{ + BUG(); +} /** * omap_dm_timer_modify_idlect_mask - Check if any running timers use ARMXOR @@ -103,184 +238,226 @@ int omap_dm_timers_active(void) */ __u32 omap_dm_timer_modify_idlect_mask(__u32 inputmask) { - int n; + int i; /* If ARMXOR cannot be idled this function call is unnecessary */ if (!(inputmask & (1 << 1))) return inputmask; /* If any active timer is using ARMXOR return modified mask */ - for (n = 0; dm_timers[n].base; ++n) - if (omap_dm_timer_read_reg(&dm_timers[n], OMAP_TIMER_CTRL_REG)& - OMAP_TIMER_CTRL_ST) { - if (((omap_readl(MOD_CONF_CTRL_1)>>(n*2)) & 0x03) == 0) + for (i = 0; i < dm_timer_count; i++) { + u32 l; + + l = omap_dm_timer_read_reg(&dm_timers[n], OMAP_TIMER_CTRL_REG); + if (l & OMAP_TIMER_CTRL_ST) { + if (((omap_readl(MOD_CONF_CTRL_1) >> (i * 2)) & 0x03) == 0) inputmask &= ~(1 << 1); else inputmask &= ~(1 << 2); } + } return inputmask; } +#elif defined(CONFIG_ARCH_OMAP2) -void omap_dm_timer_set_source(struct omap_dm_timer *timer, int source) +struct clk *omap_dm_timer_get_fclk(struct omap_dm_timer *timer) { - int n = (timer - dm_timers) << 1; - u32 l; + return timer->fclk; +} - l = omap_readl(MOD_CONF_CTRL_1) & ~(0x03 << n); - l |= source << n; - omap_writel(l, MOD_CONF_CTRL_1); +__u32 omap_dm_timer_modify_idlect_mask(__u32 inputmask) +{ + BUG(); } +#endif -static void omap_dm_timer_reset(struct omap_dm_timer *timer) +void omap_dm_timer_trigger(struct omap_dm_timer *timer) { - /* Reset and set posted mode */ - omap_dm_timer_write_reg(timer, OMAP_TIMER_IF_CTRL_REG, 0x06); - omap_dm_timer_write_reg(timer, OMAP_TIMER_OCP_CFG_REG, 0x02); - - omap_dm_timer_set_source(timer, OMAP_TIMER_SRC_ARMXOR); + omap_dm_timer_write_reg(timer, OMAP_TIMER_TRIGGER_REG, 0); } +void omap_dm_timer_start(struct omap_dm_timer *timer) +{ + u32 l; + l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG); + if (!(l & OMAP_TIMER_CTRL_ST)) { + l |= OMAP_TIMER_CTRL_ST; + omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l); + } +} -struct omap_dm_timer * omap_dm_timer_request(void) +void omap_dm_timer_stop(struct omap_dm_timer *timer) { - struct omap_dm_timer *timer = NULL; - unsigned long flags; + u32 l; - spin_lock_irqsave(&dm_timer_lock, flags); - if (!list_empty(&dm_timer_info.unused_timers)) { - timer = (struct omap_dm_timer *) - dm_timer_info.unused_timers.next; - list_move_tail((struct list_head *)timer, - &dm_timer_info.reserved_timers); + l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG); + if (l & OMAP_TIMER_CTRL_ST) { + l &= ~0x1; + omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l); } - spin_unlock_irqrestore(&dm_timer_lock, flags); - - return timer; } +#ifdef CONFIG_ARCH_OMAP1 -void omap_dm_timer_free(struct omap_dm_timer *timer) +void omap_dm_timer_set_source(struct omap_dm_timer *timer, int source) { - unsigned long flags; - - omap_dm_timer_reset(timer); + int n = (timer - dm_timers) << 1; + u32 l; - spin_lock_irqsave(&dm_timer_lock, flags); - list_move_tail((struct list_head *)timer, &dm_timer_info.unused_timers); - spin_unlock_irqrestore(&dm_timer_lock, flags); + l = omap_readl(MOD_CONF_CTRL_1) & ~(0x03 << n); + l |= source << n; + omap_writel(l, MOD_CONF_CTRL_1); } -void omap_dm_timer_set_int_enable(struct omap_dm_timer *timer, - unsigned int value) -{ - omap_dm_timer_write_reg(timer, OMAP_TIMER_INT_EN_REG, value); -} +#else -unsigned int omap_dm_timer_read_status(struct omap_dm_timer *timer) +void omap_dm_timer_set_source(struct omap_dm_timer *timer, int source) { - return omap_dm_timer_read_reg(timer, OMAP_TIMER_STAT_REG); + static const char *source_timers[] = { + "sys_ck", + "func_32k_ck", + "alt_ck" + }; + struct clk *parent; + + if (source < 0 || source >= 3) + return; + + parent = clk_get(NULL, source_timers[source]); + clk_disable(timer->fclk); + clk_set_parent(timer->fclk, parent); + clk_enable(timer->fclk); + clk_put(parent); + + /* When the functional clock disappears, too quick writes seem to + * cause an abort. */ + udelay(50); } -void omap_dm_timer_write_status(struct omap_dm_timer *timer, unsigned int value) -{ - omap_dm_timer_write_reg(timer, OMAP_TIMER_STAT_REG, value); -} +#endif -void omap_dm_timer_enable_autoreload(struct omap_dm_timer *timer) +void omap_dm_timer_set_load(struct omap_dm_timer *timer, int autoreload, + unsigned int load) { u32 l; + l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG); - l |= OMAP_TIMER_CTRL_AR; + if (autoreload) + l |= OMAP_TIMER_CTRL_AR; + else + l &= ~OMAP_TIMER_CTRL_AR; omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l); + omap_dm_timer_write_reg(timer, OMAP_TIMER_LOAD_REG, load); + omap_dm_timer_write_reg(timer, OMAP_TIMER_TRIGGER_REG, 0); } -void omap_dm_timer_trigger(struct omap_dm_timer *timer) -{ - omap_dm_timer_write_reg(timer, OMAP_TIMER_TRIGGER_REG, 1); -} - -void omap_dm_timer_set_trigger(struct omap_dm_timer *timer, unsigned int value) +void omap_dm_timer_set_match(struct omap_dm_timer *timer, int enable, + unsigned int match) { u32 l; l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG); - l |= value & 0x3; + if (enable) + l |= OMAP_TIMER_CTRL_CE; + else + l &= ~OMAP_TIMER_CTRL_CE; omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l); + omap_dm_timer_write_reg(timer, OMAP_TIMER_MATCH_REG, match); } -void omap_dm_timer_start(struct omap_dm_timer *timer) + +void omap_dm_timer_set_pwm(struct omap_dm_timer *timer, int def_on, + int toggle, int trigger) { u32 l; l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG); - l |= OMAP_TIMER_CTRL_ST; + l &= ~(OMAP_TIMER_CTRL_GPOCFG | OMAP_TIMER_CTRL_SCPWM | + OMAP_TIMER_CTRL_PT | (0x03 << 10)); + if (def_on) + l |= OMAP_TIMER_CTRL_SCPWM; + if (toggle) + l |= OMAP_TIMER_CTRL_PT; + l |= trigger << 10; omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l); } -void omap_dm_timer_stop(struct omap_dm_timer *timer) +void omap_dm_timer_set_prescaler(struct omap_dm_timer *timer, int prescaler) { u32 l; l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG); - l &= ~0x1; + l &= ~(OMAP_TIMER_CTRL_PRE | (0x07 << 2)); + if (prescaler >= 0x00 && prescaler <= 0x07) { + l |= OMAP_TIMER_CTRL_PRE; + l |= prescaler << 2; + } omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l); } -unsigned int omap_dm_timer_read_counter(struct omap_dm_timer *timer) +void omap_dm_timer_set_int_enable(struct omap_dm_timer *timer, + unsigned int value) { - return omap_dm_timer_read_reg(timer, OMAP_TIMER_COUNTER_REG); + omap_dm_timer_write_reg(timer, OMAP_TIMER_INT_EN_REG, value); } -void omap_dm_timer_reset_counter(struct omap_dm_timer *timer) +unsigned int omap_dm_timer_read_status(struct omap_dm_timer *timer) { - omap_dm_timer_write_reg(timer, OMAP_TIMER_COUNTER_REG, 0); + return omap_dm_timer_read_reg(timer, OMAP_TIMER_STAT_REG); } -void omap_dm_timer_set_load(struct omap_dm_timer *timer, unsigned int load) +void omap_dm_timer_write_status(struct omap_dm_timer *timer, unsigned int value) { - omap_dm_timer_write_reg(timer, OMAP_TIMER_LOAD_REG, load); + omap_dm_timer_write_reg(timer, OMAP_TIMER_STAT_REG, value); } -void omap_dm_timer_set_match(struct omap_dm_timer *timer, unsigned int match) +unsigned int omap_dm_timer_read_counter(struct omap_dm_timer *timer) { - omap_dm_timer_write_reg(timer, OMAP_TIMER_MATCH_REG, match); + return omap_dm_timer_read_reg(timer, OMAP_TIMER_COUNTER_REG); } -void omap_dm_timer_enable_compare(struct omap_dm_timer *timer) +int omap_dm_timers_active(void) { - u32 l; + int i; - l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG); - l |= OMAP_TIMER_CTRL_CE; - omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l); -} + for (i = 0; i < dm_timer_count; i++) { + struct omap_dm_timer *timer; + timer = &dm_timers[i]; + if (omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG) & + OMAP_TIMER_CTRL_ST) + return 1; + } + return 0; +} -static inline void __dm_timer_init(void) +int omap_dm_timer_init(void) { struct omap_dm_timer *timer; + int i; + + if (!(cpu_is_omap16xx() || cpu_is_omap24xx())) + return -ENODEV; spin_lock_init(&dm_timer_lock); - INIT_LIST_HEAD(&dm_timer_info.unused_timers); - INIT_LIST_HEAD(&dm_timer_info.reserved_timers); - - timer = &dm_timers[0]; - while (timer->base) { - list_add_tail((struct list_head *)timer, &dm_timer_info.unused_timers); - omap_dm_timer_reset(timer); - timer++; + for (i = 0; i < dm_timer_count; i++) { +#ifdef CONFIG_ARCH_OMAP2 + char clk_name[16]; +#endif + + timer = &dm_timers[i]; + timer->io_base = (void __iomem *) io_p2v(timer->phys_base); +#ifdef CONFIG_ARCH_OMAP2 + sprintf(clk_name, "gpt%d_ick", i + 1); + timer->iclk = clk_get(NULL, clk_name); + sprintf(clk_name, "gpt%d_fck", i + 1); + timer->fclk = clk_get(NULL, clk_name); +#endif } -} -static int __init omap_dm_timer_init(void) -{ - if (cpu_is_omap16xx()) - __dm_timer_init(); return 0; } - -arch_initcall(omap_dm_timer_init); diff --git a/arch/arm/plat-omap/timer32k.c b/arch/arm/plat-omap/timer32k.c index 3461a6c9665..f028e182215 100644 --- a/arch/arm/plat-omap/timer32k.c +++ b/arch/arm/plat-omap/timer32k.c @@ -7,6 +7,7 @@ * Partial timer rewrite and additional dynamic tick timer support by * Tony Lindgen <tony@atomide.com> and * Tuukka Tikkanen <tuukka.tikkanen@elektrobit.com> + * OMAP Dual-mode timer framework support by Timo Teras * * MPU timer code based on the older MPU timer code for OMAP * Copyright (C) 2000 RidgeRun, Inc. @@ -79,18 +80,6 @@ struct sys_timer omap_timer; #define OMAP1_32K_TIMER_TVR 0x00 #define OMAP1_32K_TIMER_TCR 0x04 -/* 24xx specific defines */ -#define OMAP2_GP_TIMER_BASE 0x48028000 -#define CM_CLKSEL_WKUP 0x48008440 -#define GP_TIMER_TIDR 0x00 -#define GP_TIMER_TISR 0x18 -#define GP_TIMER_TIER 0x1c -#define GP_TIMER_TCLR 0x24 -#define GP_TIMER_TCRR 0x28 -#define GP_TIMER_TLDR 0x2c -#define GP_TIMER_TTGR 0x30 -#define GP_TIMER_TSICR 0x40 - #define OMAP_32K_TICKS_PER_HZ (32768 / HZ) /* @@ -102,54 +91,64 @@ struct sys_timer omap_timer; #define JIFFIES_TO_HW_TICKS(nr_jiffies, clock_rate) \ (((nr_jiffies) * (clock_rate)) / HZ) +#if defined(CONFIG_ARCH_OMAP1) + static inline void omap_32k_timer_write(int val, int reg) { - if (cpu_class_is_omap1()) - omap_writew(val, OMAP1_32K_TIMER_BASE + reg); - - if (cpu_is_omap24xx()) - omap_writel(val, OMAP2_GP_TIMER_BASE + reg); + omap_writew(val, OMAP1_32K_TIMER_BASE + reg); } static inline unsigned long omap_32k_timer_read(int reg) { - if (cpu_class_is_omap1()) - return omap_readl(OMAP1_32K_TIMER_BASE + reg) & 0xffffff; + return omap_readl(OMAP1_32K_TIMER_BASE + reg) & 0xffffff; +} - if (cpu_is_omap24xx()) - return omap_readl(OMAP2_GP_TIMER_BASE + reg); +static inline void omap_32k_timer_start(unsigned long load_val) +{ + omap_32k_timer_write(load_val, OMAP1_32K_TIMER_TVR); + omap_32k_timer_write(0x0f, OMAP1_32K_TIMER_CR); } -/* - * The 32KHz synchronized timer is an additional timer on 16xx. - * It is always running. - */ -static inline unsigned long omap_32k_sync_timer_read(void) +static inline void omap_32k_timer_stop(void) { - return omap_readl(TIMER_32K_SYNCHRONIZED); + omap_32k_timer_write(0x0, OMAP1_32K_TIMER_CR); } +#define omap_32k_timer_ack_irq() + +#elif defined(CONFIG_ARCH_OMAP2) + +#include <asm/arch/dmtimer.h> + +static struct omap_dm_timer *gptimer; + static inline void omap_32k_timer_start(unsigned long load_val) { - if (cpu_class_is_omap1()) { - omap_32k_timer_write(load_val, OMAP1_32K_TIMER_TVR); - omap_32k_timer_write(0x0f, OMAP1_32K_TIMER_CR); - } - - if (cpu_is_omap24xx()) { - omap_32k_timer_write(0xffffffff - load_val, GP_TIMER_TCRR); - omap_32k_timer_write((1 << 1), GP_TIMER_TIER); - omap_32k_timer_write((1 << 1) | 1, GP_TIMER_TCLR); - } + omap_dm_timer_set_load(gptimer, 1, 0xffffffff - load_val); + omap_dm_timer_set_int_enable(gptimer, OMAP_TIMER_INT_OVERFLOW); + omap_dm_timer_start(gptimer); } static inline void omap_32k_timer_stop(void) { - if (cpu_class_is_omap1()) - omap_32k_timer_write(0x0, OMAP1_32K_TIMER_CR); + omap_dm_timer_stop(gptimer); +} - if (cpu_is_omap24xx()) - omap_32k_timer_write(0x0, GP_TIMER_TCLR); +static inline void omap_32k_timer_ack_irq(void) +{ + u32 status = omap_dm_timer_read_status(gptimer); + omap_dm_timer_write_status(gptimer, status); +} + +#endif + +/* + * The 32KHz synchronized timer is an additional timer on 16xx. + * It is always running. + */ +static inline unsigned long omap_32k_sync_timer_read(void) +{ + return omap_readl(TIMER_32K_SYNCHRONIZED); } /* @@ -203,11 +202,7 @@ static irqreturn_t omap_32k_timer_interrupt(int irq, void *dev_id, write_seqlock_irqsave(&xtime_lock, flags); - if (cpu_is_omap24xx()) { - u32 status = omap_32k_timer_read(GP_TIMER_TISR); - omap_32k_timer_write(status, GP_TIMER_TISR); - } - + omap_32k_timer_ack_irq(); now = omap_32k_sync_timer_read(); while ((signed long)(now - omap_32k_last_tick) @@ -269,9 +264,6 @@ static struct irqaction omap_32k_timer_irq = { .handler = omap_32k_timer_interrupt, }; -static struct clk * gpt1_ick; -static struct clk * gpt1_fck; - static __init void omap_init_32k_timer(void) { #ifdef CONFIG_NO_IDLE_HZ @@ -280,31 +272,19 @@ static __init void omap_init_32k_timer(void) if (cpu_class_is_omap1()) setup_irq(INT_OS_TIMER, &omap_32k_timer_irq); - if (cpu_is_omap24xx()) - setup_irq(37, &omap_32k_timer_irq); omap_timer.offset = omap_32k_timer_gettimeoffset; omap_32k_last_tick = omap_32k_sync_timer_read(); /* REVISIT: Check 24xx TIOCP_CFG settings after idle works */ if (cpu_is_omap24xx()) { - omap_32k_timer_write(0, GP_TIMER_TCLR); - omap_writel(0, CM_CLKSEL_WKUP); /* 32KHz clock source */ - - gpt1_ick = clk_get(NULL, "gpt1_ick"); - if (IS_ERR(gpt1_ick)) - printk(KERN_ERR "Could not get gpt1_ick\n"); - else - clk_enable(gpt1_ick); - - gpt1_fck = clk_get(NULL, "gpt1_fck"); - if (IS_ERR(gpt1_fck)) - printk(KERN_ERR "Could not get gpt1_fck\n"); - else - clk_enable(gpt1_fck); - - mdelay(100); /* Wait for clocks to stabilize */ - - omap_32k_timer_write(0x7, GP_TIMER_TISR); + gptimer = omap_dm_timer_request_specific(1); + BUG_ON(gptimer == NULL); + + omap_dm_timer_set_source(gptimer, OMAP_TIMER_SRC_32_KHZ); + setup_irq(omap_dm_timer_get_irq(gptimer), &omap_32k_timer_irq); + omap_dm_timer_set_int_enable(gptimer, + OMAP_TIMER_INT_CAPTURE | OMAP_TIMER_INT_OVERFLOW | + OMAP_TIMER_INT_MATCH); } omap_32k_timer_start(OMAP_32K_TIMER_TICK_PERIOD); @@ -317,6 +297,9 @@ static __init void omap_init_32k_timer(void) */ static void __init omap_timer_init(void) { +#ifdef CONFIG_OMAP_DM_TIMER + omap_dm_timer_init(); +#endif omap_init_32k_timer(); } |