* OMAP2 support by Juha Yrjola
* API improvements and OMAP2 clock framework support by Timo Teras
*
+ * Copyright (C) 2009 Texas Instruments
+ * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com>
+ *
* 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
#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/io.h>
+#include <linux/module.h>
+#include <mach/hardware.h>
+#include <plat/dmtimer.h>
+#include <mach/irqs.h>
/* register offsets */
-#define OMAP_TIMER_ID_REG 0x00
-#define OMAP_TIMER_OCP_CFG_REG 0x10
-#define OMAP_TIMER_SYS_STAT_REG 0x14
-#define OMAP_TIMER_STAT_REG 0x18
-#define OMAP_TIMER_INT_EN_REG 0x1c
-#define OMAP_TIMER_WAKEUP_EN_REG 0x20
-#define OMAP_TIMER_CTRL_REG 0x24
-#define OMAP_TIMER_COUNTER_REG 0x28
-#define OMAP_TIMER_LOAD_REG 0x2c
-#define OMAP_TIMER_TRIGGER_REG 0x30
-#define OMAP_TIMER_WRITE_PEND_REG 0x34
-#define OMAP_TIMER_MATCH_REG 0x38
-#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 */
+#define _OMAP_TIMER_ID_OFFSET 0x00
+#define _OMAP_TIMER_OCP_CFG_OFFSET 0x10
+#define _OMAP_TIMER_SYS_STAT_OFFSET 0x14
+#define _OMAP_TIMER_STAT_OFFSET 0x18
+#define _OMAP_TIMER_INT_EN_OFFSET 0x1c
+#define _OMAP_TIMER_WAKEUP_EN_OFFSET 0x20
+#define _OMAP_TIMER_CTRL_OFFSET 0x24
+#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 /* prescaler value shift */
+#define OMAP_TIMER_CTRL_POSTED (1 << 2)
+#define OMAP_TIMER_CTRL_AR (1 << 1) /* auto-reload enable */
+#define OMAP_TIMER_CTRL_ST (1 << 0) /* start timer */
+#define _OMAP_TIMER_COUNTER_OFFSET 0x28
+#define _OMAP_TIMER_LOAD_OFFSET 0x2c
+#define _OMAP_TIMER_TRIGGER_OFFSET 0x30
+#define _OMAP_TIMER_WRITE_PEND_OFFSET 0x34
+#define WP_NONE 0 /* no write pending bit */
+#define WP_TCLR (1 << 0)
+#define WP_TCRR (1 << 1)
+#define WP_TLDR (1 << 2)
+#define WP_TTGR (1 << 3)
+#define WP_TMAR (1 << 4)
+#define WP_TPIR (1 << 5)
+#define WP_TNIR (1 << 6)
+#define WP_TCVR (1 << 7)
+#define WP_TOCR (1 << 8)
+#define WP_TOWR (1 << 9)
+#define _OMAP_TIMER_MATCH_OFFSET 0x38
+#define _OMAP_TIMER_CAPTURE_OFFSET 0x3c
+#define _OMAP_TIMER_IF_CTRL_OFFSET 0x40
+#define _OMAP_TIMER_CAPTURE2_OFFSET 0x44 /* TCAR2, 34xx only */
+#define _OMAP_TIMER_TICK_POS_OFFSET 0x48 /* TPIR, 34xx only */
+#define _OMAP_TIMER_TICK_NEG_OFFSET 0x4c /* TNIR, 34xx only */
+#define _OMAP_TIMER_TICK_COUNT_OFFSET 0x50 /* TCVR, 34xx only */
+#define _OMAP_TIMER_TICK_INT_MASK_SET_OFFSET 0x54 /* TOCR, 34xx only */
+#define _OMAP_TIMER_TICK_INT_MASK_COUNT_OFFSET 0x58 /* TOWR, 34xx only */
+
+/* register offsets with the write pending bit encoded */
+#define WPSHIFT 16
+
+#define OMAP_TIMER_ID_REG (_OMAP_TIMER_ID_OFFSET \
+ | (WP_NONE << WPSHIFT))
+
+#define OMAP_TIMER_OCP_CFG_REG (_OMAP_TIMER_OCP_CFG_OFFSET \
+ | (WP_NONE << WPSHIFT))
+
+#define OMAP_TIMER_SYS_STAT_REG (_OMAP_TIMER_SYS_STAT_OFFSET \
+ | (WP_NONE << WPSHIFT))
+
+#define OMAP_TIMER_STAT_REG (_OMAP_TIMER_STAT_OFFSET \
+ | (WP_NONE << WPSHIFT))
+
+#define OMAP_TIMER_INT_EN_REG (_OMAP_TIMER_INT_EN_OFFSET \
+ | (WP_NONE << WPSHIFT))
+
+#define OMAP_TIMER_WAKEUP_EN_REG (_OMAP_TIMER_WAKEUP_EN_OFFSET \
+ | (WP_NONE << WPSHIFT))
+
+#define OMAP_TIMER_CTRL_REG (_OMAP_TIMER_CTRL_OFFSET \
+ | (WP_TCLR << WPSHIFT))
+
+#define OMAP_TIMER_COUNTER_REG (_OMAP_TIMER_COUNTER_OFFSET \
+ | (WP_TCRR << WPSHIFT))
+
+#define OMAP_TIMER_LOAD_REG (_OMAP_TIMER_LOAD_OFFSET \
+ | (WP_TLDR << WPSHIFT))
+
+#define OMAP_TIMER_TRIGGER_REG (_OMAP_TIMER_TRIGGER_OFFSET \
+ | (WP_TTGR << WPSHIFT))
+
+#define OMAP_TIMER_WRITE_PEND_REG (_OMAP_TIMER_WRITE_PEND_OFFSET \
+ | (WP_NONE << WPSHIFT))
+
+#define OMAP_TIMER_MATCH_REG (_OMAP_TIMER_MATCH_OFFSET \
+ | (WP_TMAR << WPSHIFT))
+
+#define OMAP_TIMER_CAPTURE_REG (_OMAP_TIMER_CAPTURE_OFFSET \
+ | (WP_NONE << WPSHIFT))
+
+#define OMAP_TIMER_IF_CTRL_REG (_OMAP_TIMER_IF_CTRL_OFFSET \
+ | (WP_NONE << WPSHIFT))
+
+#define OMAP_TIMER_CAPTURE2_REG (_OMAP_TIMER_CAPTURE2_OFFSET \
+ | (WP_NONE << WPSHIFT))
+
+#define OMAP_TIMER_TICK_POS_REG (_OMAP_TIMER_TICK_POS_OFFSET \
+ | (WP_TPIR << WPSHIFT))
+
+#define OMAP_TIMER_TICK_NEG_REG (_OMAP_TIMER_TICK_NEG_OFFSET \
+ | (WP_TNIR << WPSHIFT))
+
+#define OMAP_TIMER_TICK_COUNT_REG (_OMAP_TIMER_TICK_COUNT_OFFSET \
+ | (WP_TCVR << WPSHIFT))
+
+#define OMAP_TIMER_TICK_INT_MASK_SET_REG \
+ (_OMAP_TIMER_TICK_INT_MASK_SET_OFFSET | (WP_TOCR << WPSHIFT))
+
+#define OMAP_TIMER_TICK_INT_MASK_COUNT_REG \
+ (_OMAP_TIMER_TICK_INT_MASK_COUNT_OFFSET | (WP_TOWR << WPSHIFT))
struct omap_dm_timer {
unsigned long phys_base;
int irq;
-#ifdef CONFIG_ARCH_OMAP2
+#if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3) || \
+ defined(CONFIG_ARCH_OMAP4)
struct clk *iclk, *fclk;
#endif
void __iomem *io_base;
unsigned reserved:1;
unsigned enabled:1;
+ unsigned posted:1;
};
#ifdef CONFIG_ARCH_OMAP1
#define omap_dm_clk_enable(x)
#define omap_dm_clk_disable(x)
-
-static struct omap_dm_timer dm_timers[] = {
+#define omap2_dm_timers NULL
+#define omap2_dm_source_names NULL
+#define omap2_dm_source_clocks NULL
+#define omap3_dm_timers NULL
+#define omap3_dm_source_names NULL
+#define omap3_dm_source_clocks NULL
+#define omap4_dm_timers NULL
+#define omap4_dm_source_names NULL
+#define omap4_dm_source_clocks NULL
+
+static struct omap_dm_timer omap1_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 = 0xfffbd400, .irq = INT_1610_GPTIMER8 },
};
-#elif defined(CONFIG_ARCH_OMAP2)
+static const int dm_timer_count = ARRAY_SIZE(omap1_dm_timers);
-#define omap_dm_clk_enable(x) clk_enable(x)
-#define omap_dm_clk_disable(x) clk_disable(x)
+#elif defined(CONFIG_ARCH_OMAP2)
-static struct omap_dm_timer dm_timers[] = {
+#define omap_dm_clk_enable(x) clk_enable(x)
+#define omap_dm_clk_disable(x) clk_disable(x)
+#define omap1_dm_timers NULL
+#define omap3_dm_timers NULL
+#define omap3_dm_source_names NULL
+#define omap3_dm_source_clocks NULL
+#define omap4_dm_timers NULL
+#define omap4_dm_source_names NULL
+#define omap4_dm_source_clocks NULL
+
+static struct omap_dm_timer omap2_dm_timers[] = {
{ .phys_base = 0x48028000, .irq = INT_24XX_GPTIMER1 },
{ .phys_base = 0x4802a000, .irq = INT_24XX_GPTIMER2 },
{ .phys_base = 0x48078000, .irq = INT_24XX_GPTIMER3 },
{ .phys_base = 0x4808a000, .irq = INT_24XX_GPTIMER12 },
};
-static const char *dm_source_names[] = {
+static const char *omap2_dm_source_names[] __initdata = {
"sys_ck",
"func_32k_ck",
- "alt_ck"
+ "alt_ck",
+ NULL
+};
+
+static struct clk *omap2_dm_source_clocks[3];
+static const int dm_timer_count = ARRAY_SIZE(omap2_dm_timers);
+
+#elif defined(CONFIG_ARCH_OMAP3)
+
+#define omap_dm_clk_enable(x) clk_enable(x)
+#define omap_dm_clk_disable(x) clk_disable(x)
+#define omap1_dm_timers NULL
+#define omap2_dm_timers NULL
+#define omap2_dm_source_names NULL
+#define omap2_dm_source_clocks NULL
+#define omap4_dm_timers NULL
+#define omap4_dm_source_names NULL
+#define omap4_dm_source_clocks NULL
+
+static struct omap_dm_timer omap3_dm_timers[] = {
+ { .phys_base = 0x48318000, .irq = INT_24XX_GPTIMER1 },
+ { .phys_base = 0x49032000, .irq = INT_24XX_GPTIMER2 },
+ { .phys_base = 0x49034000, .irq = INT_24XX_GPTIMER3 },
+ { .phys_base = 0x49036000, .irq = INT_24XX_GPTIMER4 },
+ { .phys_base = 0x49038000, .irq = INT_24XX_GPTIMER5 },
+ { .phys_base = 0x4903A000, .irq = INT_24XX_GPTIMER6 },
+ { .phys_base = 0x4903C000, .irq = INT_24XX_GPTIMER7 },
+ { .phys_base = 0x4903E000, .irq = INT_24XX_GPTIMER8 },
+ { .phys_base = 0x49040000, .irq = INT_24XX_GPTIMER9 },
+ { .phys_base = 0x48086000, .irq = INT_24XX_GPTIMER10 },
+ { .phys_base = 0x48088000, .irq = INT_24XX_GPTIMER11 },
+ { .phys_base = 0x48304000, .irq = INT_34XX_GPT12_IRQ },
+};
+
+static const char *omap3_dm_source_names[] __initdata = {
+ "sys_ck",
+ "omap_32k_fck",
+ NULL
};
-static struct clk *dm_source_clocks[3];
+static struct clk *omap3_dm_source_clocks[2];
+static const int dm_timer_count = ARRAY_SIZE(omap3_dm_timers);
+
+#elif defined(CONFIG_ARCH_OMAP4)
+
+#define omap_dm_clk_enable(x) clk_enable(x)
+#define omap_dm_clk_disable(x) clk_disable(x)
+#define omap1_dm_timers NULL
+#define omap2_dm_timers NULL
+#define omap2_dm_source_names NULL
+#define omap2_dm_source_clocks NULL
+#define omap3_dm_timers NULL
+#define omap3_dm_source_names NULL
+#define omap3_dm_source_clocks NULL
+
+static struct omap_dm_timer omap4_dm_timers[] = {
+ { .phys_base = 0x4a318000, .irq = INT_44XX_GPTIMER1 },
+ { .phys_base = 0x48032000, .irq = INT_44XX_GPTIMER2 },
+ { .phys_base = 0x48034000, .irq = INT_44XX_GPTIMER3 },
+ { .phys_base = 0x48036000, .irq = INT_44XX_GPTIMER4 },
+ { .phys_base = 0x40138000, .irq = INT_44XX_GPTIMER5 },
+ { .phys_base = 0x4013a000, .irq = INT_44XX_GPTIMER6 },
+ { .phys_base = 0x4013a000, .irq = INT_44XX_GPTIMER7 },
+ { .phys_base = 0x4013e000, .irq = INT_44XX_GPTIMER8 },
+ { .phys_base = 0x4803e000, .irq = INT_44XX_GPTIMER9 },
+ { .phys_base = 0x48086000, .irq = INT_44XX_GPTIMER10 },
+ { .phys_base = 0x48088000, .irq = INT_44XX_GPTIMER11 },
+ { .phys_base = 0x4a320000, .irq = INT_44XX_GPTIMER12 },
+};
+static const char *omap4_dm_source_names[] __initdata = {
+ "sys_ck",
+ "omap_32k_fck",
+ NULL
+};
+static struct clk *omap4_dm_source_clocks[2];
+static const int dm_timer_count = ARRAY_SIZE(omap4_dm_timers);
#else
#endif
-static const int dm_timer_count = ARRAY_SIZE(dm_timers);
+static struct omap_dm_timer *dm_timers;
+static const char **dm_source_names;
+static struct clk **dm_source_clocks;
+
static spinlock_t dm_timer_lock;
-static inline u32 omap_dm_timer_read_reg(struct omap_dm_timer *timer, int reg)
+/*
+ * Reads timer registers in posted and non-posted mode. The posted mode bit
+ * is encoded in reg. Note that in posted mode write pending bit must be
+ * checked. Otherwise a read of a non completed write will produce an error.
+ */
+static inline u32 omap_dm_timer_read_reg(struct omap_dm_timer *timer, u32 reg)
{
- return readl(timer->io_base + reg);
+ if (timer->posted)
+ while (readl(timer->io_base + (OMAP_TIMER_WRITE_PEND_REG & 0xff))
+ & (reg >> WPSHIFT))
+ cpu_relax();
+ return readl(timer->io_base + (reg & 0xff));
}
-static void omap_dm_timer_write_reg(struct omap_dm_timer *timer, int reg, u32 value)
+/*
+ * Writes timer registers in posted and non-posted mode. The posted mode bit
+ * is encoded in reg. Note that in posted mode the write pending bit must be
+ * checked. Otherwise a write on a register which has a pending write will be
+ * lost.
+ */
+static void omap_dm_timer_write_reg(struct omap_dm_timer *timer, u32 reg,
+ u32 value)
{
- writel(value, timer->io_base + reg);
- while (omap_dm_timer_read_reg(timer, OMAP_TIMER_WRITE_PEND_REG))
- ;
+ if (timer->posted)
+ while (readl(timer->io_base + (OMAP_TIMER_WRITE_PEND_REG & 0xff))
+ & (reg >> WPSHIFT))
+ cpu_relax();
+ writel(value, timer->io_base + (reg & 0xff));
}
static void omap_dm_timer_wait_for_reset(struct omap_dm_timer *timer)
}
omap_dm_timer_set_source(timer, OMAP_TIMER_SRC_32_KHZ);
- /* Set to smart-idle mode */
l = omap_dm_timer_read_reg(timer, OMAP_TIMER_OCP_CFG_REG);
- l |= 0x02 << 3;
+ l |= 0x02 << 3; /* Set to smart-idle mode */
+ l |= 0x2 << 8; /* Set clock activity to perserve f-clock on idle */
- if (cpu_class_is_omap2() && timer == &dm_timers[0]) {
- /* Enable wake-up only for GPT1 on OMAP2 CPUs*/
+ /*
+ * Enable wake-up on OMAP2 CPUs.
+ */
+ if (cpu_class_is_omap2())
l |= 1 << 2;
- /* Non-posted mode */
- omap_dm_timer_write_reg(timer, OMAP_TIMER_IF_CTRL_REG, 0);
- }
omap_dm_timer_write_reg(timer, OMAP_TIMER_OCP_CFG_REG, l);
+
+ /* Match hardware reset default of posted mode */
+ omap_dm_timer_write_reg(timer, OMAP_TIMER_IF_CTRL_REG,
+ OMAP_TIMER_CTRL_POSTED);
+ timer->posted = 1;
}
static void omap_dm_timer_prepare(struct omap_dm_timer *timer)
return timer;
}
+EXPORT_SYMBOL_GPL(omap_dm_timer_request);
struct omap_dm_timer *omap_dm_timer_request_specific(int id)
{
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);
+ __FILE__, __LINE__, __func__, id);
dump_stack();
return NULL;
}
return timer;
}
+EXPORT_SYMBOL_GPL(omap_dm_timer_request_specific);
void omap_dm_timer_free(struct omap_dm_timer *timer)
{
WARN_ON(!timer->reserved);
timer->reserved = 0;
}
+EXPORT_SYMBOL_GPL(omap_dm_timer_free);
void omap_dm_timer_enable(struct omap_dm_timer *timer)
{
timer->enabled = 1;
}
+EXPORT_SYMBOL_GPL(omap_dm_timer_enable);
void omap_dm_timer_disable(struct omap_dm_timer *timer)
{
timer->enabled = 0;
}
+EXPORT_SYMBOL_GPL(omap_dm_timer_disable);
int omap_dm_timer_get_irq(struct omap_dm_timer *timer)
{
return timer->irq;
}
+EXPORT_SYMBOL_GPL(omap_dm_timer_get_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
* @inputmask: current value of idlect mask
return inputmask;
}
+EXPORT_SYMBOL_GPL(omap_dm_timer_modify_idlect_mask);
-#elif defined(CONFIG_ARCH_OMAP2)
+#elif defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3) || \
+ defined(CONFIG_ARCH_OMAP4)
struct clk *omap_dm_timer_get_fclk(struct omap_dm_timer *timer)
{
return timer->fclk;
}
+EXPORT_SYMBOL_GPL(omap_dm_timer_get_fclk);
__u32 omap_dm_timer_modify_idlect_mask(__u32 inputmask)
{
return 0;
}
+EXPORT_SYMBOL_GPL(omap_dm_timer_modify_idlect_mask);
#endif
{
omap_dm_timer_write_reg(timer, OMAP_TIMER_TRIGGER_REG, 0);
}
+EXPORT_SYMBOL_GPL(omap_dm_timer_trigger);
void omap_dm_timer_start(struct omap_dm_timer *timer)
{
omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
}
}
+EXPORT_SYMBOL_GPL(omap_dm_timer_start);
void omap_dm_timer_stop(struct omap_dm_timer *timer)
{
if (l & OMAP_TIMER_CTRL_ST) {
l &= ~0x1;
omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
+#if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3) || \
+ defined(CONFIG_ARCH_OMAP4)
+ /* Readback to make sure write has completed */
+ omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
+ /*
+ * Wait for functional clock period x 3.5 to make sure that
+ * timer is stopped
+ */
+ udelay(3500000 / clk_get_rate(timer->fclk) + 1);
+ /* Ack possibly pending interrupt */
+ omap_dm_timer_write_reg(timer, OMAP_TIMER_STAT_REG,
+ OMAP_TIMER_INT_OVERFLOW);
+#endif
}
}
+EXPORT_SYMBOL_GPL(omap_dm_timer_stop);
#ifdef CONFIG_ARCH_OMAP1
-void omap_dm_timer_set_source(struct omap_dm_timer *timer, int source)
+int omap_dm_timer_set_source(struct omap_dm_timer *timer, int source)
{
int n = (timer - dm_timers) << 1;
u32 l;
l = omap_readl(MOD_CONF_CTRL_1) & ~(0x03 << n);
l |= source << n;
omap_writel(l, MOD_CONF_CTRL_1);
+
+ return 0;
}
+EXPORT_SYMBOL_GPL(omap_dm_timer_set_source);
#else
-void omap_dm_timer_set_source(struct omap_dm_timer *timer, int source)
+int omap_dm_timer_set_source(struct omap_dm_timer *timer, int source)
{
+ int ret = -EINVAL;
+
if (source < 0 || source >= 3)
- return;
+ return -EINVAL;
clk_disable(timer->fclk);
- clk_set_parent(timer->fclk, dm_source_clocks[source]);
+ ret = clk_set_parent(timer->fclk, dm_source_clocks[source]);
clk_enable(timer->fclk);
- /* When the functional clock disappears, too quick writes seem to
- * cause an abort. */
- __delay(15000);
+ /*
+ * When the functional clock disappears, too quick writes seem
+ * to cause an abort. XXX Is this still necessary?
+ */
+ __delay(150000);
+
+ return ret;
}
+EXPORT_SYMBOL_GPL(omap_dm_timer_set_source);
#endif
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);
}
+EXPORT_SYMBOL_GPL(omap_dm_timer_set_load);
+
+/* Optimized set_load which removes costly spin wait in timer_start */
+void omap_dm_timer_set_load_start(struct omap_dm_timer *timer, int autoreload,
+ unsigned int load)
+{
+ u32 l;
+
+ l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
+ if (autoreload) {
+ l |= OMAP_TIMER_CTRL_AR;
+ omap_dm_timer_write_reg(timer, OMAP_TIMER_LOAD_REG, load);
+ } else {
+ l &= ~OMAP_TIMER_CTRL_AR;
+ }
+ l |= OMAP_TIMER_CTRL_ST;
+
+ omap_dm_timer_write_reg(timer, OMAP_TIMER_COUNTER_REG, load);
+ omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
+}
+EXPORT_SYMBOL_GPL(omap_dm_timer_set_load_start);
void omap_dm_timer_set_match(struct omap_dm_timer *timer, int enable,
unsigned int match)
omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
omap_dm_timer_write_reg(timer, OMAP_TIMER_MATCH_REG, match);
}
-
+EXPORT_SYMBOL_GPL(omap_dm_timer_set_match);
void omap_dm_timer_set_pwm(struct omap_dm_timer *timer, int def_on,
int toggle, int trigger)
l |= trigger << 10;
omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
}
+EXPORT_SYMBOL_GPL(omap_dm_timer_set_pwm);
void omap_dm_timer_set_prescaler(struct omap_dm_timer *timer, int prescaler)
{
}
omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
}
+EXPORT_SYMBOL_GPL(omap_dm_timer_set_prescaler);
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);
omap_dm_timer_write_reg(timer, OMAP_TIMER_WAKEUP_EN_REG, value);
}
+EXPORT_SYMBOL_GPL(omap_dm_timer_set_int_enable);
unsigned int omap_dm_timer_read_status(struct omap_dm_timer *timer)
{
return l;
}
+EXPORT_SYMBOL_GPL(omap_dm_timer_read_status);
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);
}
+EXPORT_SYMBOL_GPL(omap_dm_timer_write_status);
unsigned int omap_dm_timer_read_counter(struct omap_dm_timer *timer)
{
return l;
}
+EXPORT_SYMBOL_GPL(omap_dm_timer_read_counter);
void omap_dm_timer_write_counter(struct omap_dm_timer *timer, unsigned int value)
{
omap_dm_timer_write_reg(timer, OMAP_TIMER_COUNTER_REG, value);
}
+EXPORT_SYMBOL_GPL(omap_dm_timer_write_counter);
int omap_dm_timers_active(void)
{
}
return 0;
}
+EXPORT_SYMBOL_GPL(omap_dm_timers_active);
-int omap_dm_timer_init(void)
+int __init omap_dm_timer_init(void)
{
struct omap_dm_timer *timer;
- int i;
+ int i, map_size = SZ_8K; /* Module 4KB + L4 4KB except on omap1 */
- if (!(cpu_is_omap16xx() || cpu_is_omap24xx()))
+ if (!(cpu_is_omap16xx() || cpu_class_is_omap2()))
return -ENODEV;
spin_lock_init(&dm_timer_lock);
-#ifdef CONFIG_ARCH_OMAP2
- for (i = 0; i < ARRAY_SIZE(dm_source_names); i++) {
- dm_source_clocks[i] = clk_get(NULL, dm_source_names[i]);
- BUG_ON(dm_source_clocks[i] == NULL);
+
+ if (cpu_class_is_omap1()) {
+ dm_timers = omap1_dm_timers;
+ map_size = SZ_2K;
+ } else if (cpu_is_omap24xx()) {
+ dm_timers = omap2_dm_timers;
+ dm_source_names = omap2_dm_source_names;
+ dm_source_clocks = omap2_dm_source_clocks;
+ } else if (cpu_is_omap34xx()) {
+ dm_timers = omap3_dm_timers;
+ dm_source_names = omap3_dm_source_names;
+ dm_source_clocks = omap3_dm_source_clocks;
+ } else if (cpu_is_omap44xx()) {
+ dm_timers = omap4_dm_timers;
+ dm_source_names = omap4_dm_source_names;
+ dm_source_clocks = omap4_dm_source_clocks;
}
-#endif
- for (i = 0; i < dm_timer_count; i++) {
-#ifdef CONFIG_ARCH_OMAP2
- char clk_name[16];
-#endif
+ if (cpu_class_is_omap2())
+ for (i = 0; dm_source_names[i] != NULL; i++)
+ dm_source_clocks[i] = clk_get(NULL, dm_source_names[i]);
+
+ if (cpu_is_omap243x())
+ dm_timers[0].phys_base = 0x49018000;
+ for (i = 0; i < dm_timer_count; i++) {
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);
+
+ /* Static mapping, never released */
+ timer->io_base = ioremap(timer->phys_base, map_size);
+ BUG_ON(!timer->io_base);
+
+#if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3) || \
+ defined(CONFIG_ARCH_OMAP4)
+ if (cpu_class_is_omap2()) {
+ char clk_name[16];
+ 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
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff