From: Saravana Kannan <[email protected]> Some drivers may need to query the secure environment about the availability of a particular service/command. Add support for this.
Signed-off-by: Saravana Kannan <[email protected]> [[email protected]: Add some commit text] Signed-off-by: Stephen Boyd <[email protected]> --- arch/arm/mach-qcom/scm.c | 18 +++++++++++++++++- arch/arm/mach-qcom/scm.h | 2 ++ 2 files changed, 19 insertions(+), 1 deletion(-) diff --git a/arch/arm/mach-qcom/scm.c b/arch/arm/mach-qcom/scm.c index a05cad3fa1c5..e80571f57ca4 100644 --- a/arch/arm/mach-qcom/scm.c +++ b/arch/arm/mach-qcom/scm.c @@ -1,4 +1,4 @@ -/* Copyright (c) 2010, Code Aurora Forum. All rights reserved. +/* Copyright (c) 2010-2014, The Linux Foundation. All rights reserved. * * 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 @@ -394,3 +394,19 @@ u32 scm_get_version(void) return version; } EXPORT_SYMBOL(scm_get_version); + +#define IS_CALL_AVAIL_CMD 1 +int scm_is_call_available(u32 svc_id, u32 cmd_id) +{ + int ret; + u32 svc_cmd = (svc_id << 10) | cmd_id; + u32 ret_val = 0; + + ret = scm_call(SCM_SVC_INFO, IS_CALL_AVAIL_CMD, &svc_cmd, + sizeof(svc_cmd), &ret_val, sizeof(ret_val)); + if (ret) + return ret; + + return ret_val; +} +EXPORT_SYMBOL(scm_is_call_available); diff --git a/arch/arm/mach-qcom/scm.h b/arch/arm/mach-qcom/scm.h index 1f0f0180e767..f94c7279616a 100644 --- a/arch/arm/mach-qcom/scm.h +++ b/arch/arm/mach-qcom/scm.h @@ -14,6 +14,7 @@ #define SCM_SVC_BOOT 0x1 #define SCM_SVC_PIL 0x2 +#define SCM_SVC_INFO 0x6 extern int scm_call(u32 svc_id, u32 cmd_id, const void *cmd_buf, size_t cmd_len, void *resp_buf, size_t resp_len); @@ -24,5 +25,6 @@ extern s32 scm_call_atomic2(u32 svc, u32 cmd, u32 arg1, u32 arg2); #define SCM_VERSION(major, minor) (((major) << 16) | ((minor) & 0xFF)) extern u32 scm_get_version(void); +extern int scm_is_call_available(u32 svc_id, u32 cmd_id); #endif -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, hosted by The Linux Foundation -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
