[PATCH 5/8] msm: scm: Add API to query for service/command availability.
From: Stephen Boyd <hidden>
Date: 2014-08-05 01:35:17
Also in:
linux-arm-msm, lkml
Subsystem:
arm port, arm/qualcomm mailing list, arm/qualcomm support, the rest · Maintainers:
Russell King, Bjorn Andersson, Konrad Dybcio, Linus Torvalds
From: Saravana Kannan <redacted> 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 <redacted> [sboyd at codeaurora.org: Add some commit text] Signed-off-by: Stephen Boyd <redacted> --- 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
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