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#include <linux/init.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/wait.h>
#include <linux/workqueue.h>
#include <linux/sched.h>
#include <mach/wmt_secure.h>
#include <mach/wmt_env.h>
#define WMT_SMC_CMD_WW_BASE 60
#define WMT_SMC_CMD_WAIT_STUB (WMT_SMC_CMD_WW_BASE + 1)
#define WMT_SMC_CMD_WAKE_STUB (WMT_SMC_CMD_WW_BASE + 2)
#define WMT_SMC_CMD_WAKE_BEGIN (WMT_SMC_CMD_WW_BASE + 3)
#define WMT_SMC_CMD_WAKE_DONE (WMT_SMC_CMD_WW_BASE + 4)
#define WMT_SMC_CMD_WW_TEST (WMT_SMC_CMD_WW_BASE + 5)
DECLARE_WAIT_QUEUE_HEAD(wmt_smc_wait);
static int smc_done = 0;
static void wmt_smc_wait_stub(void)
{
wait_event_interruptible(wmt_smc_wait, smc_done);
smc_done = 0;
wmt_smc(WMT_SMC_CMD_WAKE_DONE, 0);
}
static void wmt_smc_wake_stub(void)
{
/* irq already been disabled in secure world */
smc_done = 1;
wake_up_interruptible(&wmt_smc_wait);
wmt_smc(WMT_SMC_CMD_WAKE_BEGIN, 0);
}
static void wmt_setup_wait_stub(u32 wait_stub)
{
wmt_smc(WMT_SMC_CMD_WAIT_STUB, wait_stub);
}
static void wmt_setup_wake_stub(u32 wake_stub)
{
wmt_smc(WMT_SMC_CMD_WAKE_STUB, wake_stub);
}
static int __init wmt_check_secure_env(void)
{
int ret = 0;
int varlen = 128;
unsigned int sec_en = 0;
unsigned char buf[128] = {0};
/* uboot env name is: wmt.secure.param */
ret = wmt_getsyspara("wmt.secure.param", buf, &varlen);
if (ret) {
ret = -ENODATA;
goto out;
}
sscanf(buf, "%d", &sec_en);
if (sec_en != 1) {
printk(KERN_INFO "wmt security extension disaled\n");
ret = -ENODEV;
goto out;
}
out:
return ret;
}
static int __init wmt_secure_wait_wake_init(void)
{
/* if secure os disabled, we do not setup stubs */
if (wmt_check_secure_env())
return -EINVAL;
wmt_setup_wait_stub((u32)wmt_smc_wait_stub);
wmt_setup_wake_stub((u32)wmt_smc_wake_stub);
return 0;
}
module_init(wmt_secure_wait_wake_init);
static void __exit wmt_secure_wait_wake_exit(void)
{
return ;
}
module_exit(wmt_secure_wait_wake_exit);
MODULE_AUTHOR("WonderMedia Technologies, Inc");
MODULE_DESCRIPTION("WMT Secure Wait & Wake Implementation");
MODULE_LICENSE("Dual BSD/GPL");
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