int gpt_get_cnt(unsigned int id, unsigned int *ptr)
{
unsigned long save_flags;
struct gpt_device *dev = id_to_dev(id);
if (!dev || !ptr)
return -EINVAL;
if (!(dev->features & GPT_FEAT_64_BIT)) {
__gpt_get_cnt(dev, ptr);
} else {
gpt_update_lock(save_flags);
__gpt_get_cnt(dev, ptr);
gpt_update_unlock(save_flags);
}
return 0;
}
static cycle_t mt_gpt_read(struct clocksource *cs)
{
cycle_t cycles;
unsigned int cnt[2] = {0, 0};
struct gpt_device *dev = id_to_dev(GPT_CLKSRC_ID);
__gpt_get_cnt(dev, cnt);
cycles = ((cycle_t)(cnt[1])) << 32 | (cycle_t)(cnt[0]);
return cycles;
}
static void syscnt_assist_resume(void)
{
unsigned int old_loop;
unsigned int assist_cnt1, assist_cnt2;
unsigned int syscnt_cnt[2] = {0};
struct gpt_device *assist_dev = id_to_dev(GPT_SYSCNT_ASSIST_ID);
struct gpt_device *syscnt_dev = id_to_dev(GPT_SYSCNT_ID);
do {
__gpt_get_cnt(assist_dev, &assist_cnt1);
__gpt_get_cnt(syscnt_dev, syscnt_cnt);
__gpt_ack_irq(assist_dev);
__gpt_get_cnt(assist_dev, &assist_cnt2);
} while (assist_cnt1 > assist_cnt2);
old_loop = loop;
loop = syscnt_cnt[1];
printk("[%s]assist(0x%08x, 0x%08x),syscnt(0x%08x,0x%08x),loop(%u->%u)\n",
__func__, assist_cnt1, assist_cnt2, syscnt_cnt[0], syscnt_cnt[1],
old_loop, loop);
}
static void syscnt_assist_handler(unsigned long data)
{
unsigned int assist_cnt;
unsigned int syscnt_cnt[2] = {0};
unsigned int cnth;
unsigned int pct_lo, pct_hi;
int cnt = 0;
struct gpt_device *assist_dev = id_to_dev(GPT_SYSCNT_ASSIST_ID);
struct gpt_device *syscnt_dev = id_to_dev(GPT_SYSCNT_ID);
__gpt_get_cnt(assist_dev, &assist_cnt);
__gpt_get_cnt(syscnt_dev, syscnt_cnt);
loop++;
do {
cnt++;
cnth = DRV_Reg32(syscnt_dev->base_addr + GPT_CNTH);
if ((cnt / CHECK_WARNING_TIMERS) && !(cnt % CHECK_WARNING_TIMERS)) {
printk("[%s]WARNING: fail to sync GPT_CNTH!! assist(0x%08x),"
"syscnt(0x%08x,0x%08x),cnth(0x%08x),loop(0x%08x),cnt(%d)\n",
__func__, assist_cnt, syscnt_cnt[0], syscnt_cnt[1],
cnth, loop, cnt);
}
} while (cnth != loop);
read_cntpct(pct_lo, pct_hi);
WARN_ON(pct_hi != loop);
printk("[%s]syscnt assist IRQ!! assist(0x%08x),syscnt(0x%08x,0x%08x),"
"cnth:pct_hi:loop(0x%08x,0x%08x,0x%08x),cnt(%d)\n", __func__,
assist_cnt, syscnt_cnt[0], syscnt_cnt[1], cnth, pct_hi, loop, cnt);
}
static cycle_t mt_gpt_read(struct clocksource *cs)
{
cycle_t cycles;
unsigned int cnt[2] = {0, 0};
struct gpt_device *dev = id_to_dev(GPT_CLKSRC_ID);
__gpt_get_cnt(dev, cnt);
if (GPT_CLKSRC_ID != GPT6) {
/*
* force do mask for high 32-bit to avoid unpredicted alignment
*/
cycles = (GPT_BIT_MASK_L & (cycle_t) (cnt[0]));
} else {
cycles = (GPT_BIT_MASK_H & (((cycle_t) (cnt[1])) << 32)) | (GPT_BIT_MASK_L&((cycle_t) (cnt[0])));
}
return cycles;
}