*/
#include <linux/init.h>
-#include <linux/bootmem.h>
#include <linux/platform_device.h>
#include <linux/spinlock.h>
#include <linux/interrupt.h>
#include <linux/err.h>
#include <linux/clocksource.h>
#include <linux/clockchips.h>
-#include <linux/sh_cmt.h>
+#include <linux/sh_timer.h>
struct sh_cmt_priv {
void __iomem *mapbase;
struct platform_device *pdev;
unsigned long flags;
+ unsigned long flags_suspend;
unsigned long match_value;
unsigned long next_match_value;
unsigned long max_match_value;
static inline unsigned long sh_cmt_read(struct sh_cmt_priv *p, int reg_nr)
{
- struct sh_cmt_config *cfg = p->pdev->dev.platform_data;
+ struct sh_timer_config *cfg = p->pdev->dev.platform_data;
void __iomem *base = p->mapbase;
unsigned long offs;
static inline void sh_cmt_write(struct sh_cmt_priv *p, int reg_nr,
unsigned long value)
{
- struct sh_cmt_config *cfg = p->pdev->dev.platform_data;
+ struct sh_timer_config *cfg = p->pdev->dev.platform_data;
void __iomem *base = p->mapbase;
unsigned long offs;
int *has_wrapped)
{
unsigned long v1, v2, v3;
+ int o1, o2;
+
+ o1 = sh_cmt_read(p, CMCSR) & p->overflow_bit;
/* Make sure the timer value is stable. Stolen from acpi_pm.c */
do {
+ o2 = o1;
v1 = sh_cmt_read(p, CMCNT);
v2 = sh_cmt_read(p, CMCNT);
v3 = sh_cmt_read(p, CMCNT);
- } while (unlikely((v1 > v2 && v1 < v3) || (v2 > v3 && v2 < v1)
- || (v3 > v1 && v3 < v2)));
+ o1 = sh_cmt_read(p, CMCSR) & p->overflow_bit;
+ } while (unlikely((o1 != o2) || (v1 > v2 && v1 < v3)
+ || (v2 > v3 && v2 < v1) || (v3 > v1 && v3 < v2)));
- *has_wrapped = sh_cmt_read(p, CMCSR) & p->overflow_bit;
+ *has_wrapped = o1;
return v2;
}
static void sh_cmt_start_stop_ch(struct sh_cmt_priv *p, int start)
{
- struct sh_cmt_config *cfg = p->pdev->dev.platform_data;
+ struct sh_timer_config *cfg = p->pdev->dev.platform_data;
unsigned long flags, value;
/* start stop register shared by multiple timer channels */
static int sh_cmt_enable(struct sh_cmt_priv *p, unsigned long *rate)
{
- struct sh_cmt_config *cfg = p->pdev->dev.platform_data;
+ struct sh_timer_config *cfg = p->pdev->dev.platform_data;
int ret;
/* enable clock */
pr_err("sh_cmt: cannot enable clock \"%s\"\n", cfg->clk);
return ret;
}
- *rate = clk_get_rate(p->clk) / 8;
/* make sure channel is disabled */
sh_cmt_start_stop_ch(p, 0);
/* configure channel, periodic mode and maximum timeout */
- if (p->width == 16)
- sh_cmt_write(p, CMCSR, 0);
- else
+ if (p->width == 16) {
+ *rate = clk_get_rate(p->clk) / 512;
+ sh_cmt_write(p, CMCSR, 0x43);
+ } else {
+ *rate = clk_get_rate(p->clk) / 8;
sh_cmt_write(p, CMCSR, 0x01a4);
+ }
sh_cmt_write(p, CMCOR, 0xffffffff);
sh_cmt_write(p, CMCNT, 0);
/* disable channel */
sh_cmt_start_stop_ch(p, 0);
+ /* disable interrupts in CMT block */
+ sh_cmt_write(p, CMCSR, 0);
+
/* stop clock */
clk_disable(p->clk);
}
raw = sh_cmt_get_counter(p, &has_wrapped);
if (unlikely(has_wrapped))
- raw = p->match_value;
+ raw += p->match_value;
spin_unlock_irqrestore(&p->lock, flags);
return value + raw;
clockevents_register_device(ced);
}
-int sh_cmt_register(struct sh_cmt_priv *p, char *name,
- unsigned long clockevent_rating,
- unsigned long clocksource_rating)
+static int sh_cmt_register(struct sh_cmt_priv *p, char *name,
+ unsigned long clockevent_rating,
+ unsigned long clocksource_rating)
{
if (p->width == (sizeof(p->max_match_value) * 8))
p->max_match_value = ~0;
static int sh_cmt_setup(struct sh_cmt_priv *p, struct platform_device *pdev)
{
- struct sh_cmt_config *cfg = pdev->dev.platform_data;
+ struct sh_timer_config *cfg = pdev->dev.platform_data;
struct resource *res;
int irq, ret;
ret = -ENXIO;
p->irqaction.handler = sh_cmt_interrupt;
p->irqaction.dev_id = p;
p->irqaction.flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL;
- p->irqaction.mask = CPU_MASK_NONE;
ret = setup_irq(irq, &p->irqaction);
if (ret) {
pr_err("sh_cmt: failed to request irq %d\n", irq);
if (resource_size(res) == 6) {
p->width = 16;
p->overflow_bit = 0x80;
- p->clear_bits = ~0xc0;
+ p->clear_bits = ~0x80;
} else {
p->width = 32;
p->overflow_bit = 0x8000;
static int __devinit sh_cmt_probe(struct platform_device *pdev)
{
struct sh_cmt_priv *p = platform_get_drvdata(pdev);
- struct sh_cmt_config *cfg = pdev->dev.platform_data;
+ struct sh_timer_config *cfg = pdev->dev.platform_data;
int ret;
if (p) {
return 0;
}
- if (is_early_platform_device(pdev))
- p = alloc_bootmem(sizeof(*p));
- else
- p = kmalloc(sizeof(*p), GFP_KERNEL);
-
+ p = kmalloc(sizeof(*p), GFP_KERNEL);
if (p == NULL) {
dev_err(&pdev->dev, "failed to allocate driver data\n");
return -ENOMEM;
ret = sh_cmt_setup(p, pdev);
if (ret) {
- if (is_early_platform_device(pdev))
- free_bootmem(__pa(p), sizeof(*p));
- else
- kfree(p);
-
+ kfree(p);
platform_set_drvdata(pdev, NULL);
}
return ret;
return -EBUSY; /* cannot unregister clockevent and clocksource */
}
+static int sh_cmt_suspend(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct sh_cmt_priv *p = platform_get_drvdata(pdev);
+
+ /* save flag state and stop CMT channel */
+ p->flags_suspend = p->flags;
+ sh_cmt_stop(p, p->flags);
+ return 0;
+}
+
+static int sh_cmt_resume(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct sh_cmt_priv *p = platform_get_drvdata(pdev);
+
+ /* start CMT channel from saved state */
+ sh_cmt_start(p, p->flags_suspend);
+ return 0;
+}
+
+static struct dev_pm_ops sh_cmt_dev_pm_ops = {
+ .suspend = sh_cmt_suspend,
+ .resume = sh_cmt_resume,
+};
+
static struct platform_driver sh_cmt_device_driver = {
.probe = sh_cmt_probe,
.remove = __devexit_p(sh_cmt_remove),
.driver = {
.name = "sh_cmt",
+ .pm = &sh_cmt_dev_pm_ops,
}
};
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff