/**
* scu_ipc_ioctl - control ioctls for the SCU
* @fp: file handle of the SCU device
* @cmd: ioctl coce
* @arg: pointer to user passed structure
*
* Support the I/O and firmware flashing interfaces of the SCU
*/
static long scu_ipc_ioctl(struct file *fp, unsigned int cmd,
unsigned long arg)
{
int ret;
struct scu_ipc_data data;
void __user *argp = (void __user *)arg;
if (!capable(CAP_SYS_RAWIO))
return -EPERM;
if (cmd == INTE_SCU_IPC_FW_UPDATE) {
u8 *fwbuf = kmalloc(MAX_FW_SIZE, GFP_KERNEL);
if (fwbuf == NULL)
return -ENOMEM;
if (copy_from_user(fwbuf, (u8 *)arg, MAX_FW_SIZE)) {
kfree(fwbuf);
return -EFAULT;
}
ret = intel_scu_ipc_fw_update(fwbuf, MAX_FW_SIZE);
kfree(fwbuf);
return ret;
} else {
if (copy_from_user(&data, argp, sizeof(struct scu_ipc_data)))
return -EFAULT;
ret = scu_reg_access(cmd, &data);
if (ret < 0)
return ret;
if (copy_to_user(argp, &data, sizeof(struct scu_ipc_data)))
return -EFAULT;
return 0;
}
}
static void intel_mid_reboot(void)
{
if (intel_scu_ipc_fw_update()) {
pr_debug("intel_scu_fw_update: IFWI upgrade failed...\n");
}
if (!reboot_force) {
/* system_state is SYSTEM_RESTART now,
* polling to wait for SCU not busy.
*/
while (intel_scu_ipc_check_status())
udelay(10);
}
if (force_cold_boot)
#ifdef CONFIG_X86_MDFLD
rpmsg_send_generic_simple_command(IPCMSG_COLD_BOOT, 0);
#else
outb(RSTC_COLD_BOOT, RSTC_IO_PORT_ADDR);
#endif
else {
switch (reboot_force) {
static void intel_mid_reboot(void)
{
if (intel_scu_ipc_fw_update()) {
pr_debug("intel_scu_fw_update: IFWI upgrade failed...\n");
}
if (!reboot_force) {
/* system_state is SYSTEM_RESTART now,
* polling to wait for SCU not busy.
*/
while (intel_scu_ipc_check_status())
udelay(10);
}
if (force_cold_boot)
outb(RSTC_COLD_BOOT, RSTC_IO_PORT_ADDR);
else {
switch (reboot_force) {
case REBOOT_FORCE_OFF:
/* this will cause context execution error when rebooting */
/* in panic, but this is the very last action we take */
rpmsg_send_generic_simple_command(RP_COLD_OFF, 0);
break;
case REBOOT_FORCE_ON:
pr_info("***** INFO: reboot requested but forced to keep system on *****\n");
while(1); /* halt */
break;
case REBOOT_FORCE_COLD_RESET:
outb(RSTC_COLD_RESET, RSTC_IO_PORT_ADDR);
break;
case REBOOT_FORCE_COLD_BOOT:
outb(RSTC_COLD_BOOT, RSTC_IO_PORT_ADDR);
break;
default:
outb(RSTC_COLD_RESET, RSTC_IO_PORT_ADDR);
}
}
}