drivers/firmware/qcom_scm.c

   1 /* Copyright (c) 2010,2015, The Linux Foundation. All rights reserved.
   2  * Copyright (C) 2015 Linaro Ltd.
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 and
   6  * only version 2 as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program; if not, write to the Free Software
  15  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  16  * 02110-1301, USA.
  17  */
  18
  19 #include <linux/cpumask.h>
  20 #include <linux/export.h>
  21 #include <linux/types.h>
  22 #include <linux/qcom_scm.h>
  23
  24 #include "qcom_scm.h"
  25
  26 /**
  27  * qcom_scm_set_cold_boot_addr() - Set the cold boot address for cpus
  28  * @entry: Entry point function for the cpus
  29  * @cpus: The cpumask of cpus that will use the entry point
  30  *
  31  * Set the cold boot address of the cpus. Any cpu outside the supported
  32  * range would be removed from the cpu present mask.
  33  */
  34 int qcom_scm_set_cold_boot_addr(void *entry, const cpumask_t *cpus)
  35 {
  36         return __qcom_scm_set_cold_boot_addr(entry, cpus);
  37 }
  38 EXPORT_SYMBOL(qcom_scm_set_cold_boot_addr);
  39
  40 /**
  41  * qcom_scm_set_warm_boot_addr() - Set the warm boot address for cpus
  42  * @entry: Entry point function for the cpus
  43  * @cpus: The cpumask of cpus that will use the entry point
  44  *
  45  * Set the Linux entry point for the SCM to transfer control to when coming
  46  * out of a power down. CPU power down may be executed on cpuidle or hotplug.
  47  */
  48 int qcom_scm_set_warm_boot_addr(void *entry, const cpumask_t *cpus)
  49 {
  50         return __qcom_scm_set_warm_boot_addr(entry, cpus);
  51 }
  52 EXPORT_SYMBOL(qcom_scm_set_warm_boot_addr);
  53
  54 /**
  55  * qcom_scm_cpu_power_down() - Power down the cpu
  56  * @flags - Flags to flush cache
  57  *
  58  * This is an end point to power down cpu. If there was a pending interrupt,
  59  * the control would return from this function, otherwise, the cpu jumps to the
  60  * warm boot entry point set for this cpu upon reset.
  61  */
  62 void qcom_scm_cpu_power_down(u32 flags)
  63 {
  64         __qcom_scm_cpu_power_down(flags);
  65 }
  66 EXPORT_SYMBOL(qcom_scm_cpu_power_down);
  67
  68 /**
  69  * qcom_scm_hdcp_available() - Check if secure environment supports HDCP.
  70  *
  71  * Return true if HDCP is supported, false if not.
  72  */
  73 bool qcom_scm_hdcp_available(void)
  74 {
  75         int ret;
  76
  77         ret = __qcom_scm_is_call_available(QCOM_SCM_SVC_HDCP,
  78                 QCOM_SCM_CMD_HDCP);
  79
  80         return (ret > 0) ? true : false;
  81 }
  82 EXPORT_SYMBOL(qcom_scm_hdcp_available);
  83
  84 /**
  85  * qcom_scm_hdcp_req() - Send HDCP request.
  86  * @req: HDCP request array
  87  * @req_cnt: HDCP request array count
  88  * @resp: response buffer passed to SCM
  89  *
  90  * Write HDCP register(s) through SCM.
  91  */
  92 int qcom_scm_hdcp_req(struct qcom_scm_hdcp_req *req, u32 req_cnt, u32 *resp)
  93 {
  94         return __qcom_scm_hdcp_req(req, req_cnt, resp);
  95 }
  96 EXPORT_SYMBOL(qcom_scm_hdcp_req);