diff --git a/libc/kernel/uapi/linux/hsi/cs-protocol.h b/libc/kernel/uapi/linux/hsi/cs-protocol.h
new file mode 100644
index 0000000..4f6fd4d
--- /dev/null
+++ b/libc/kernel/uapi/linux/hsi/cs-protocol.h
@@ -0,0 +1,89 @@
+/****************************************************************************
+ ****************************************************************************
+ ***
+ ***   This header was automatically generated from a Linux kernel header
+ ***   of the same name, to make information necessary for userspace to
+ ***   call into the kernel available to libc.  It contains only constants,
+ ***   structures, and macros generated from the original header, and thus,
+ ***   contains no copyrightable information.
+ ***
+ ***   To edit the content of this header, modify the corresponding
+ ***   source file (e.g. under external/kernel-headers/original/) then
+ ***   run bionic/libc/kernel/tools/update_all.py
+ ***
+ ***   Any manual change here will be lost the next time this script will
+ ***   be run. You've been warned!
+ ***
+ ****************************************************************************
+ ****************************************************************************/
+#ifndef _CS_PROTOCOL_H
+#define _CS_PROTOCOL_H
+#include <linux/types.h>
+#include <linux/ioctl.h>
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define CS_DEV_FILE_NAME "/dev/cmt_speech"
+#define CS_IF_VERSION 2
+#define CS_CMD_SHIFT 28
+#define CS_DOMAIN_SHIFT 24
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define CS_CMD_MASK 0xff000000
+#define CS_PARAM_MASK 0xffffff
+#define CS_CMD(id,dom) (((id) << CS_CMD_SHIFT) | ((dom) << CS_DOMAIN_SHIFT))
+#define CS_ERROR CS_CMD(1, 0)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define CS_RX_DATA_RECEIVED CS_CMD(2, 0)
+#define CS_TX_DATA_READY CS_CMD(3, 0)
+#define CS_TX_DATA_SENT CS_CMD(4, 0)
+#define CS_ERR_PEER_RESET 0
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define CS_FEAT_TSTAMP_RX_CTRL (1 << 0)
+#define CS_FEAT_ROLLING_RX_COUNTER (2 << 0)
+#define CS_STATE_CLOSED 0
+#define CS_STATE_OPENED 1
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define CS_STATE_CONFIGURED 2
+#define CS_MAX_BUFFERS_SHIFT 4
+#define CS_MAX_BUFFERS (1 << CS_MAX_BUFFERS_SHIFT)
+struct cs_buffer_config {
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+  __u32 rx_bufs;
+  __u32 tx_bufs;
+  __u32 buf_size;
+  __u32 flags;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+  __u32 reserved[4];
+};
+struct cs_timestamp {
+  __u32 tv_sec;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+  __u32 tv_nsec;
+};
+struct cs_mmap_config_block {
+  __u32 reserved1;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+  __u32 buf_size;
+  __u32 rx_bufs;
+  __u32 tx_bufs;
+  __u32 reserved2;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+  __u32 rx_offsets[CS_MAX_BUFFERS];
+  __u32 tx_offsets[CS_MAX_BUFFERS];
+  __u32 rx_ptr;
+  __u32 rx_ptr_boundary;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+  __u32 reserved3[2];
+  struct cs_timestamp tstamp_rx_ctrl;
+};
+#define CS_IO_MAGIC 'C'
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define CS_IOW(num,dtype) _IOW(CS_IO_MAGIC, num, dtype)
+#define CS_IOR(num,dtype) _IOR(CS_IO_MAGIC, num, dtype)
+#define CS_IOWR(num,dtype) _IOWR(CS_IO_MAGIC, num, dtype)
+#define CS_IO(num) _IO(CS_IO_MAGIC, num)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define CS_GET_STATE CS_IOR(21, unsigned int)
+#define CS_SET_WAKELINE CS_IOW(23, unsigned int)
+#define CS_GET_IF_VERSION CS_IOR(30, unsigned int)
+#define CS_CONFIG_BUFS CS_IOW(31, struct cs_buffer_config)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#endif