static int switch_memory_state(int mask, int new_state, int start_region,
int end_region)
{
int final_mask = 0;
int i;
mutex_lock(&mem_regions_mutex);
for (i = start_region; i <= end_region; i++) {
if (new_state == mem_regions[i].state)
goto no_change;
if (mem_regions[i].state != mem_regions[start_region].state)
goto no_change;
}
if (new_state == STATE_POWER_DOWN)
final_mask = mem_regions_mask & mask;
else if (new_state == STATE_ACTIVE)
final_mask = mem_regions_mask | ~mask;
else
goto no_change;
pr_info("request memory %d to %d state switch (%d->%d)\n",
start_region, end_region, mem_regions[start_region].state,
new_state);
if (rpm_change_memory_state(final_mask, final_mask) == 0) {
for (i = start_region; i <= end_region; i++)
mem_regions[i].state = new_state;
mem_regions_mask = final_mask;
pr_info("completed memory %d to %d state switch to %d\n",
start_region, end_region, new_state);
mutex_unlock(&mem_regions_mutex);
return 0;
}
pr_err("failed memory %d to %d state switch (%d->%d)\n",
start_region, end_region, mem_regions[start_region].state,
new_state);
no_change:
mutex_unlock(&mem_regions_mutex);
return -EINVAL;
}
static int switch_memory_state(int id, int new_state)
{
int mask = 0;
int power_down_masks[MAX_NR_REGIONS] = { 0xFFFFFF00, 0xFFFF00FF,
0xFF00FFFF, 0x00FFFFFF };
int self_refresh_masks[MAX_NR_REGIONS] = { 0xFFFFFFF0, 0xFFFFFF0F,
0xFFFFF0FF, 0xFFFF0FFF };
mutex_lock(&mem_regions[id].state_mutex);
if (new_state == mem_regions[id].state)
goto no_change;
pr_info("request memory %d state switch (%d->%d) mode %d\n", id,
mem_regions[id].state, new_state, dmm_mode);
if (new_state == STATE_POWER_DOWN) {
if (dmm_mode == MEM_DEEP_POWER_DOWN)
mask = mem_regions[id].mask & power_down_masks[id];
else
mask = mem_regions[id].mask & self_refresh_masks[id];
} else if (new_state == STATE_ACTIVE) {
if (dmm_mode == MEM_DEEP_POWER_DOWN)
mask = mem_regions[id].mask | (~power_down_masks[id]);
else
mask = mem_regions[id].mask | (~self_refresh_masks[id]);
}
if (rpm_change_memory_state(mask, mask) == 0) {
mem_regions[id].state = new_state;
mem_regions[id].mask = mask;
pr_info("completed memory %d state switch to %d mode %d\n",
id, new_state, dmm_mode);
mutex_unlock(&mem_regions[id].state_mutex);
return 0;
}
pr_err("failed memory %d state switch (%d->%d) mode %d\n", id,
mem_regions[id].state, new_state, dmm_mode);
no_change:
mutex_unlock(&mem_regions[id].state_mutex);
return -EINVAL;
}
