soc: qcom: add support for fingerprint sensor driver

The QBT1000 driver provides an API for communicating
with trustzone applications and handles firmware event
interrupts.
The driver supports the following features:
 - loading and unloading trustzone applications
 - sending commands to trustzone applications
 - voting/un-voting for clocks before/after making
   a trustzone call
 - receiving firmware events, signalled by interrupts,
   and providing them to the driver client
 - sending a key event in response to firmware finger
   detect events

Change-Id: I1d9d7a6b6bd2d3420a28a8c09868143bb9bd3b27
Signed-off-by: Lior Barenboim <liorb@codeaurora.org>

2 files changed, 100 insertions, 0 deletions

diff --git a/include/uapi/linux/Kbuild b/include/uapi/linux/Kbuild
index 0bac6947a1cb..d6ff882ad6a7 100644
--- a/include/uapi/linux/Kbuild
+++ b/include/uapi/linux/Kbuild
@@ -381,6 +381,7 @@ header-y += prctl.h
 header-y += psci.h
 header-y += ptp_clock.h
 header-y += ptrace.h
+header-y += qbt1000.h
 header-y += qcedev.h
 header-y += qcota.h
 header-y += qnx4_fs.h
diff --git a/include/uapi/linux/qbt1000.h b/include/uapi/linux/qbt1000.h
new file mode 100644
index 000000000000..8a3be2c634d3
--- /dev/null
+++ b/include/uapi/linux/qbt1000.h
@@ -0,0 +1,99 @@
+#ifndef _UAPI_QBT1000_H_
+#define _UAPI_QBT1000_H_
+
+#define MAX_NAME_SIZE					 32
+
+/*
+* enum qbt1000_commands -
+*      enumeration of command options
+* @QBT1000_LOAD_APP - cmd loads TZ app
+* @QBT1000_UNLOAD_APP - cmd unloads TZ app
+* @QBT1000_SEND_TZCMD - sends cmd to TZ app
+* @QBT1000_SET_FINGER_DETECT_KEY - sets the input key to send on finger detect
+* @QBT1000_CONFIGURE_POWER_KEY - enables/disables sending the power key on
+	finger down events
+*/
+enum qbt1000_commands {
+	QBT1000_LOAD_APP = 100,
+	QBT1000_UNLOAD_APP = 101,
+	QBT1000_SEND_TZCMD = 102,
+	QBT1000_SET_FINGER_DETECT_KEY = 103,
+	QBT1000_CONFIGURE_POWER_KEY = 104
+};
+
+/*
+* enum qbt1000_fw_event -
+*      enumeration of firmware events
+* @FW_EVENT_FINGER_DOWN - finger down detected
+* @FW_EVENT_FINGER_UP - finger up detected
+* @FW_EVENT_INDICATION - an indication IPC from the firmware is pending
+*/
+enum qbt1000_fw_event {
+	FW_EVENT_FINGER_DOWN = 1,
+	FW_EVENT_FINGER_UP = 2,
+	FW_EVENT_CBGE_REQUIRED = 3,
+};
+
+/*
+* struct qbt1000_app -
+*      used to load and unload apps in TZ
+* @app_handle - qseecom handle for clients
+* @name - Name of secure app to load
+* @size - Size of requested buffer of secure app
+* @high_band_width - 1 - for high bandwidth usage
+*                    0 - for normal bandwidth usage
+*/
+struct qbt1000_app {
+	struct qseecom_handle **app_handle;
+	char name[MAX_NAME_SIZE];
+	uint32_t size;
+	uint8_t high_band_width;
+};
+
+/*
+* struct qbt1000_send_tz_cmd -
+*      used to cmds to TZ App
+* @app_handle - qseecom handle for clients
+* @req_buf - Buffer containing request for secure app
+* @req_buf_len - Length of request buffer
+* @rsp_buf - Buffer containing response from secure app
+* @rsp_buf_len - Length of response buffer
+*/
+struct qbt1000_send_tz_cmd {
+	struct qseecom_handle *app_handle;
+	uint8_t *req_buf;
+	uint32_t req_buf_len;
+	uint8_t *rsp_buf;
+	uint32_t rsp_buf_len;
+};
+
+/*
+* struct qbt1000_erie_event -
+*      used to receive events from Erie
+* @buf - Buffer containing event from Erie
+* @buf_len - Length of buffer
+*/
+struct qbt1000_erie_event {
+	uint8_t *buf;
+	uint32_t buf_len;
+};
+
+/*
+* struct qbt1000_set_finger_detect_key -
+*      used to configure the input key which is sent on finger down/up event
+* @key_code - Key code to send on finger down/up. 0 disables sending key events
+*/
+struct qbt1000_set_finger_detect_key {
+	unsigned int key_code;
+};
+
+/*
+* struct qbt1000_configure_power_key -
+*      used to configure whether the power key is sent on finger down
+* @enable - if non-zero, power key is sent on finger down
+*/
+struct qbt1000_configure_power_key {
+	unsigned int enable;
+};
+
+#endif /* _UAPI_QBT1000_H_ */