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authorjilai wang <jilaiw@codeaurora.org>2015-04-10 16:15:59 -0400
committerKumar Gala <galak@codeaurora.org>2015-05-28 10:47:45 -0500
commit9626b6993b2e6faf047d2d96958e8474edc9c7a5 (patch)
tree1d6522df22f58a37088f1942460b8779cebe2d2e /drivers/firmware
parentb6a1dfbc7d57409accf213e78db7b059c206be9e (diff)
downloadlinux-9626b6993b2e6faf047d2d96958e8474edc9c7a5.tar.bz2
firmware: qcom: scm: Add HDCP Support
HDCP driver needs to check if secure environment supports HDCP. If it's supported, then it requires to program some registers through SCM. Add qcom_scm_hdcp_available and qcom_scm_hdcp_req to support these requirements. Signed-off-by: Jilai Wang <jilaiw@codeaurora.org> Signed-off-by: Kumar Gala <galak@codeaurora.org>
Diffstat (limited to 'drivers/firmware')
-rw-r--r--drivers/firmware/qcom_scm-32.c25
-rw-r--r--drivers/firmware/qcom_scm.c32
-rw-r--r--drivers/firmware/qcom_scm.h11
3 files changed, 65 insertions, 3 deletions
diff --git a/drivers/firmware/qcom_scm-32.c b/drivers/firmware/qcom_scm-32.c
index b08b822ebafa..1bd6f9c34331 100644
--- a/drivers/firmware/qcom_scm-32.c
+++ b/drivers/firmware/qcom_scm-32.c
@@ -1,4 +1,4 @@
-/* Copyright (c) 2010, Code Aurora Forum. All rights reserved.
+/* 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
@@ -478,3 +478,26 @@ void __qcom_scm_cpu_power_down(u32 flags)
qcom_scm_call_atomic1(QCOM_SCM_SVC_BOOT, QCOM_SCM_CMD_TERMINATE_PC,
flags & QCOM_SCM_FLUSH_FLAG_MASK);
}
+
+int __qcom_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 = qcom_scm_call(QCOM_SCM_SVC_INFO, QCOM_IS_CALL_AVAIL_CMD, &svc_cmd,
+ sizeof(svc_cmd), &ret_val, sizeof(ret_val));
+ if (ret)
+ return ret;
+
+ return ret_val;
+}
+
+int __qcom_scm_hdcp_req(struct qcom_scm_hdcp_req *req, u32 req_cnt, u32 *resp)
+{
+ if (req_cnt > QCOM_SCM_HDCP_MAX_REQ_CNT)
+ return -ERANGE;
+
+ return qcom_scm_call(QCOM_SCM_SVC_HDCP, QCOM_SCM_CMD_HDCP,
+ req, req_cnt * sizeof(*req), resp, sizeof(*resp));
+}
diff --git a/drivers/firmware/qcom_scm.c b/drivers/firmware/qcom_scm.c
index 99892415299b..45c008d68891 100644
--- a/drivers/firmware/qcom_scm.c
+++ b/drivers/firmware/qcom_scm.c
@@ -1,4 +1,4 @@
-/* Copyright (c) 2010, Code Aurora Forum. All rights reserved.
+/* 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
@@ -64,3 +64,33 @@ 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);
diff --git a/drivers/firmware/qcom_scm.h b/drivers/firmware/qcom_scm.h
index 1172be917307..2cce75c08b99 100644
--- a/drivers/firmware/qcom_scm.h
+++ b/drivers/firmware/qcom_scm.h
@@ -1,4 +1,4 @@
-/* Copyright (c) 2010-2014, The Linux Foundation. All rights reserved.
+/* Copyright (c) 2010-2015, 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
@@ -27,6 +27,15 @@ extern int __qcom_scm_set_cold_boot_addr(void *entry, const cpumask_t *cpus);
#define QCOM_SCM_CMD_CORE_HOTPLUGGED 0x10
extern void __qcom_scm_cpu_power_down(u32 flags);
+#define QCOM_SCM_SVC_INFO 0x6
+#define QCOM_IS_CALL_AVAIL_CMD 0x1
+extern int __qcom_scm_is_call_available(u32 svc_id, u32 cmd_id);
+
+#define QCOM_SCM_SVC_HDCP 0x11
+#define QCOM_SCM_CMD_HDCP 0x01
+extern int __qcom_scm_hdcp_req(struct qcom_scm_hdcp_req *req, u32 req_cnt,
+ u32 *resp);
+
/* common error codes */
#define QCOM_SCM_ENOMEM -5
#define QCOM_SCM_EOPNOTSUPP -4