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kernel/linux-rt-4.4.41/drivers/firmware/qcom_scm.c 2.96 KB
5113f6f70   김현기   kernel add
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  /* Copyright (c) 2010,2015, The Linux Foundation. All rights reserved.
   * Copyright (C) 2015 Linaro Ltd.
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License version 2 and
   * only version 2 as published by the Free Software Foundation.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
   * 02110-1301, USA.
   */
  
  #include <linux/cpumask.h>
  #include <linux/export.h>
  #include <linux/types.h>
  #include <linux/qcom_scm.h>
  
  #include "qcom_scm.h"
  
  /**
   * qcom_scm_set_cold_boot_addr() - Set the cold boot address for cpus
   * @entry: Entry point function for the cpus
   * @cpus: The cpumask of cpus that will use the entry point
   *
   * Set the cold boot address of the cpus. Any cpu outside the supported
   * range would be removed from the cpu present mask.
   */
  int qcom_scm_set_cold_boot_addr(void *entry, const cpumask_t *cpus)
  {
  	return __qcom_scm_set_cold_boot_addr(entry, cpus);
  }
  EXPORT_SYMBOL(qcom_scm_set_cold_boot_addr);
  
  /**
   * qcom_scm_set_warm_boot_addr() - Set the warm boot address for cpus
   * @entry: Entry point function for the cpus
   * @cpus: The cpumask of cpus that will use the entry point
   *
   * Set the Linux entry point for the SCM to transfer control to when coming
   * out of a power down. CPU power down may be executed on cpuidle or hotplug.
   */
  int qcom_scm_set_warm_boot_addr(void *entry, const cpumask_t *cpus)
  {
  	return __qcom_scm_set_warm_boot_addr(entry, cpus);
  }
  EXPORT_SYMBOL(qcom_scm_set_warm_boot_addr);
  
  /**
   * qcom_scm_cpu_power_down() - Power down the cpu
   * @flags - Flags to flush cache
   *
   * This is an end point to power down cpu. If there was a pending interrupt,
   * the control would return from this function, otherwise, the cpu jumps to the
   * warm boot entry point set for this cpu upon reset.
   */
  void qcom_scm_cpu_power_down(u32 flags)
  {
  	__qcom_scm_cpu_power_down(flags);
  }
  EXPORT_SYMBOL(qcom_scm_cpu_power_down);
  
  /**
   * qcom_scm_hdcp_available() - Check if secure environment supports HDCP.
   *
   * Return true if HDCP is supported, false if not.
   */
  bool qcom_scm_hdcp_available(void)
  {
  	int ret;
  
  	ret = __qcom_scm_is_call_available(QCOM_SCM_SVC_HDCP,
  		QCOM_SCM_CMD_HDCP);
  
  	return (ret > 0) ? true : false;
  }
  EXPORT_SYMBOL(qcom_scm_hdcp_available);
  
  /**
   * qcom_scm_hdcp_req() - Send HDCP request.
   * @req: HDCP request array
   * @req_cnt: HDCP request array count
   * @resp: response buffer passed to SCM
   *
   * Write HDCP register(s) through SCM.
   */
  int qcom_scm_hdcp_req(struct qcom_scm_hdcp_req *req, u32 req_cnt, u32 *resp)
  {
  	return __qcom_scm_hdcp_req(req, req_cnt, resp);
  }
  EXPORT_SYMBOL(qcom_scm_hdcp_req);