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authorKevin Hilman <khilman@deeprootsystems.com>2009-04-14 07:04:16 -0500
committerKevin Hilman <khilman@deeprootsystems.com>2009-04-23 09:31:09 -0700
commitf5c122da543ebf98a5ccb3166768e38eea3120dd (patch)
tree0275d0646aab07c8e3bf9ef5a22572bcf668f400 /arch/arm/mach-davinci/time.c
parentc5b736d093217890245a33e9a98fe92d6f3529bf (diff)
davinci: add arch_ioremap() which uses existing static mappings
Add arch-specific ioremap() which uses any existing static mappings in place of doing a new mapping. From now on, drivers should always use ioremap() instead of IO_ADDRESS(). In addition, remove the davinci_[read|write]* macros in favor of using ioremap. Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Diffstat (limited to 'arch/arm/mach-davinci/time.c')
-rw-r--r--arch/arm/mach-davinci/time.c79
1 files changed, 44 insertions, 35 deletions
diff --git a/arch/arm/mach-davinci/time.c b/arch/arm/mach-davinci/time.c
index 6c227d4ba99..88864ae067b 100644
--- a/arch/arm/mach-davinci/time.c
+++ b/arch/arm/mach-davinci/time.c
@@ -16,6 +16,9 @@
#include <linux/clockchips.h>
#include <linux/spinlock.h>
#include <linux/io.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/device.h>
#include <mach/hardware.h>
#include <asm/system.h>
@@ -24,6 +27,8 @@
#include <asm/mach/time.h>
#include <asm/errno.h>
#include <mach/io.h>
+#include <mach/cputype.h>
+#include "clock.h"
static struct clock_event_device clockevent_davinci;
@@ -99,9 +104,9 @@ struct timer_s {
unsigned int id;
unsigned long period;
unsigned long opts;
- unsigned long reg_base;
- unsigned long tim_reg;
- unsigned long prd_reg;
+ void __iomem *base;
+ unsigned long tim_off;
+ unsigned long prd_off;
unsigned long enamode_shift;
struct irqaction irqaction;
};
@@ -114,15 +119,15 @@ static struct timer_s timers[];
static int timer32_config(struct timer_s *t)
{
- u32 tcr = davinci_readl(t->reg_base + TCR);
+ u32 tcr = __raw_readl(t->base + TCR);
/* disable timer */
tcr &= ~(TCR_ENAMODE_MASK << t->enamode_shift);
- davinci_writel(tcr, t->reg_base + TCR);
+ __raw_writel(tcr, t->base + TCR);
/* reset counter to zero, set new period */
- davinci_writel(0, t->tim_reg);
- davinci_writel(t->period, t->prd_reg);
+ __raw_writel(0, t->base + t->tim_off);
+ __raw_writel(t->period, t->base + t->prd_off);
/* Set enable mode */
if (t->opts & TIMER_OPTS_ONESHOT) {
@@ -131,13 +136,13 @@ static int timer32_config(struct timer_s *t)
tcr |= TCR_ENAMODE_PERIODIC << t->enamode_shift;
}
- davinci_writel(tcr, t->reg_base + TCR);
+ __raw_writel(tcr, t->base + TCR);
return 0;
}
static inline u32 timer32_read(struct timer_s *t)
{
- return davinci_readl(t->tim_reg);
+ return __raw_readl(t->base + t->tim_off);
}
static irqreturn_t timer_interrupt(int irq, void *dev_id)
@@ -176,51 +181,54 @@ static struct timer_s timers[] = {
static void __init timer_init(void)
{
- u32 bases[] = {DAVINCI_TIMER0_BASE, DAVINCI_TIMER1_BASE};
+ u32 phys_bases[] = {DAVINCI_TIMER0_BASE, DAVINCI_TIMER1_BASE};
int i;
/* Global init of each 64-bit timer as a whole */
for(i=0; i<2; i++) {
- u32 tgcr, base = bases[i];
+ u32 tgcr;
+ void __iomem *base = IO_ADDRESS(phys_bases[i]);
/* Disabled, Internal clock source */
- davinci_writel(0, base + TCR);
+ __raw_writel(0, base + TCR);
/* reset both timers, no pre-scaler for timer34 */
tgcr = 0;
- davinci_writel(tgcr, base + TGCR);
+ __raw_writel(tgcr, base + TGCR);
/* Set both timers to unchained 32-bit */
tgcr = TGCR_TIMMODE_32BIT_UNCHAINED << TGCR_TIMMODE_SHIFT;
- davinci_writel(tgcr, base + TGCR);
+ __raw_writel(tgcr, base + TGCR);
/* Unreset timers */
tgcr |= (TGCR_UNRESET << TGCR_TIM12RS_SHIFT) |
(TGCR_UNRESET << TGCR_TIM34RS_SHIFT);
- davinci_writel(tgcr, base + TGCR);
+ __raw_writel(tgcr, base + TGCR);
/* Init both counters to zero */
- davinci_writel(0, base + TIM12);
- davinci_writel(0, base + TIM34);
+ __raw_writel(0, base + TIM12);
+ __raw_writel(0, base + TIM34);
}
/* Init of each timer as a 32-bit timer */
for (i=0; i< ARRAY_SIZE(timers); i++) {
struct timer_s *t = &timers[i];
+ u32 phys_base;
if (t->name) {
t->id = i;
- t->reg_base = (IS_TIMER1(t->id) ?
+ phys_base = (IS_TIMER1(t->id) ?
DAVINCI_TIMER1_BASE : DAVINCI_TIMER0_BASE);
+ t->base = IO_ADDRESS(phys_base);
if (IS_TIMER_BOT(t->id)) {
t->enamode_shift = 6;
- t->tim_reg = t->reg_base + TIM12;
- t->prd_reg = t->reg_base + PRD12;
+ t->tim_off = TIM12;
+ t->prd_off = PRD12;
} else {
t->enamode_shift = 22;
- t->tim_reg = t->reg_base + TIM34;
- t->prd_reg = t->reg_base + PRD34;
+ t->tim_off = TIM34;
+ t->prd_off = PRD34;
}
/* Register interrupt */
@@ -333,42 +341,43 @@ struct sys_timer davinci_timer = {
/* reset board using watchdog timer */
void davinci_watchdog_reset(void) {
- u32 tgcr, wdtcr, base = DAVINCI_WDOG_BASE;
+ u32 tgcr, wdtcr;
+ void __iomem *base = IO_ADDRESS(DAVINCI_WDOG_BASE);
/* disable, internal clock source */
- davinci_writel(0, base + TCR);
+ __raw_writel(0, base + TCR);
/* reset timer, set mode to 64-bit watchdog, and unreset */
tgcr = 0;
- davinci_writel(tgcr, base + TCR);
+ __raw_writel(tgcr, base + TCR);
tgcr = TGCR_TIMMODE_64BIT_WDOG << TGCR_TIMMODE_SHIFT;
tgcr |= (TGCR_UNRESET << TGCR_TIM12RS_SHIFT) |
(TGCR_UNRESET << TGCR_TIM34RS_SHIFT);
- davinci_writel(tgcr, base + TCR);
+ __raw_writel(tgcr, base + TCR);
/* clear counter and period regs */
- davinci_writel(0, base + TIM12);
- davinci_writel(0, base + TIM34);
- davinci_writel(0, base + PRD12);
- davinci_writel(0, base + PRD34);
+ __raw_writel(0, base + TIM12);
+ __raw_writel(0, base + TIM34);
+ __raw_writel(0, base + PRD12);
+ __raw_writel(0, base + PRD34);
/* enable */
- wdtcr = davinci_readl(base + WDTCR);
+ wdtcr = __raw_readl(base + WDTCR);
wdtcr |= WDTCR_WDEN_ENABLE << WDTCR_WDEN_SHIFT;
- davinci_writel(wdtcr, base + WDTCR);
+ __raw_writel(wdtcr, base + WDTCR);
/* put watchdog in pre-active state */
wdtcr = (WDTCR_WDKEY_SEQ0 << WDTCR_WDKEY_SHIFT) |
(WDTCR_WDEN_ENABLE << WDTCR_WDEN_SHIFT);
- davinci_writel(wdtcr, base + WDTCR);
+ __raw_writel(wdtcr, base + WDTCR);
/* put watchdog in active state */
wdtcr = (WDTCR_WDKEY_SEQ1 << WDTCR_WDKEY_SHIFT) |
(WDTCR_WDEN_ENABLE << WDTCR_WDEN_SHIFT);
- davinci_writel(wdtcr, base + WDTCR);
+ __raw_writel(wdtcr, base + WDTCR);
/* write an invalid value to the WDKEY field to trigger
* a watchdog reset */
wdtcr = 0x00004000;
- davinci_writel(wdtcr, base + WDTCR);
+ __raw_writel(wdtcr, base + WDTCR);
}