Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 598646bf authored by Casey Piper's avatar Casey Piper
Browse files

HDCP TZ module: query for HDCP 1.4 SW keys 



Implement API for starting app and setting
keys through QSEECom. This allows compatible
hardware to use SW HDCP keys instead of
fused keys.

Change-Id: Ia70cf4b4695040973f61449569798be106748fef
Signed-off-by: default avatarCasey Piper <cpiper@codeaurora.org>
parent d4bc64ea

drivers/misc/hdcp.c

+67 −0
Original line number Diff line number Diff line
@@ -33,11 +33,13 @@ 
#include "qseecom_kernel.h"



#define TZAPP_NAME            "hdcp2p2"

#define HDCP1_APP_NAME        "hdcp1"

#define QSEECOM_SBUFF_SIZE    0x1000



#define MAX_TX_MESSAGE_SIZE	129

#define MAX_RX_MESSAGE_SIZE	534

#define MAX_TOPOLOGY_ELEMS	32

#define HDCP1_AKSV_SIZE         8



/* parameters related to LC_Init message */

#define MESSAGE_ID_SIZE            1
@@ -60,6 +62,7 @@ 
#define REPEATER_AUTH_SEND_ACK_MESSAGE_ID      15

#define REPEATER_AUTH_STREAM_MANAGE_MESSAGE_ID 16

#define REPEATER_AUTH_STREAM_READY_MESSAGE_ID  17

#define HDCP1_SET_KEY_MESSAGE_ID       202



#define BITS_8_IN_BYTES       1

#define BITS_16_IN_BYTES      2
@@ -158,6 +161,16 @@ struct topology_info { 
	struct receiver_info rcvinfo[MAX_TOPOLOGY_ELEMS];

};



struct __attribute__ ((__packed__)) hdcp1_key_set_req {

	uint32_t commandid;

};



struct __attribute__ ((__packed__)) hdcp1_key_set_rsp {

	uint32_t commandid;

	uint32_t ret;

	uint8_t ksv[HDCP1_AKSV_SIZE];

};



struct __attribute__ ((__packed__)) hdcp_init_req {

	uint32_t commandid;

};
@@ -534,6 +547,60 @@ static void hdcp2p2_msg_arrive_work_fn(struct work_struct *work) 
 * APIs exposed to all clients

 */



int hdcp1_set_keys(uint32_t *aksv_msb, uint32_t *aksv_lsb)

{

	int rc = 0;

	struct hdcp1_key_set_req *key_set_req;

	struct hdcp1_key_set_rsp *key_set_rsp;

	struct qseecom_handle *hdcp1_handle = NULL;



	if (aksv_msb == NULL || aksv_lsb == NULL)

		return -EINVAL;



	/* start hdcp1 app */

	rc = qseecom_start_app(&hdcp1_handle, HDCP1_APP_NAME,

						QSEECOM_SBUFF_SIZE);

	if (rc) {

		pr_err("%s: qseecom_start_app failed %d\n", __func__, rc);

		return -ENOSYS;

	}



	/* set keys and request aksv */

	key_set_req = (struct hdcp1_key_set_req *)hdcp1_handle->sbuf;

	key_set_req->commandid = HDCP1_SET_KEY_MESSAGE_ID;

	key_set_rsp = (struct hdcp1_key_set_rsp *)(hdcp1_handle->sbuf +

			QSEECOM_ALIGN(sizeof(struct hdcp1_key_set_req)));

	rc = qseecom_send_command(hdcp1_handle,

		key_set_req, QSEECOM_ALIGN(sizeof(struct hdcp1_key_set_req)),

		key_set_rsp, QSEECOM_ALIGN(sizeof(struct hdcp1_key_set_rsp)));



	if (rc < 0) {

		pr_err("%s: qseecom cmd failed err=%d\n", __func__, rc);

		return -ENOKEY;

	}



	rc = key_set_rsp->ret;

	if (rc) {

		pr_err("%s: set key cmd failed, rsp=%d\n", __func__,

			key_set_rsp->ret);

		return -ENOKEY;

	}



	/* copy bytes into msb and lsb */

	*aksv_msb = key_set_rsp->ksv[0] << 24;

	*aksv_msb |= key_set_rsp->ksv[1] << 16;

	*aksv_msb |= key_set_rsp->ksv[2] << 8;

	*aksv_msb |= key_set_rsp->ksv[3];

	*aksv_lsb = key_set_rsp->ksv[4] << 24;

	*aksv_lsb |= key_set_rsp->ksv[5] << 16;

	*aksv_lsb |= key_set_rsp->ksv[6] << 8;

	*aksv_lsb |= key_set_rsp->ksv[7];



	return 0;

}

EXPORT_SYMBOL(hdcp1_set_keys);





/*

 * initilaizes internal states of the library and loads HDCP secure application

 * returns a context handle to the caller as an indication of success

include/linux/hdcp_qseecom.h

+1 −0
Original line number Diff line number Diff line
@@ -71,5 +71,6 @@ struct hdcp_client_ops { 
int hdcp_library_init(void **pphdcpcontext, struct hdcp_client_ops *client_ops,

	struct hdcp_txmtr_ops *txmtr_ops, void *client_ctx);

int hdcp_library_deinit(void *phdcpcontext);

int hdcp1_set_keys(uint32_t *aksv_msb, uint32_t *aksv_lsb);



#endif /* __HDCP_QSEECOM_H */