1 files changed, 77 insertions, 0 deletions

diff --git a/include/linux/mailbox/mtk-cmdq-mailbox.h b/include/linux/mailbox/mtk-cmdq-mailbox.h
new file mode 100644
index 000000000000..ccb73422c2fa
--- /dev/null
+++ b/include/linux/mailbox/mtk-cmdq-mailbox.h
@@ -0,0 +1,77 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2018 MediaTek Inc.
+ *
+ */
+
+#ifndef __MTK_CMDQ_MAILBOX_H__
+#define __MTK_CMDQ_MAILBOX_H__
+
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+
+#define CMDQ_INST_SIZE                  8 /* instruction is 64-bit */
+#define CMDQ_SUBSYS_SHIFT               16
+#define CMDQ_OP_CODE_SHIFT              24
+#define CMDQ_JUMP_PASS                  CMDQ_INST_SIZE
+
+#define CMDQ_WFE_UPDATE                 BIT(31)
+#define CMDQ_WFE_WAIT                   BIT(15)
+#define CMDQ_WFE_WAIT_VALUE             0x1
+
+/*
+ * CMDQ_CODE_MASK:
+ *   set write mask
+ *   format: op mask
+ * CMDQ_CODE_WRITE:
+ *   write value into target register
+ *   format: op subsys address value
+ * CMDQ_CODE_JUMP:
+ *   jump by offset
+ *   format: op offset
+ * CMDQ_CODE_WFE:
+ *   wait for event and clear
+ *   it is just clear if no wait
+ *   format: [wait]  op event update:1 to_wait:1 wait:1
+ *           [clear] op event update:1 to_wait:0 wait:0
+ * CMDQ_CODE_EOC:
+ *   end of command
+ *   format: op irq_flag
+ */
+enum cmdq_code {
+        CMDQ_CODE_MASK = 0x02,
+        CMDQ_CODE_WRITE = 0x04,
+        CMDQ_CODE_JUMP = 0x10,
+        CMDQ_CODE_WFE = 0x20,
+        CMDQ_CODE_EOC = 0x40,
+};
+
+enum cmdq_cb_status {
+        CMDQ_CB_NORMAL = 0,
+        CMDQ_CB_ERROR
+};
+
+struct cmdq_cb_data {
+        enum cmdq_cb_status     sta;
+        void                    *data;
+};
+
+typedef void (*cmdq_async_flush_cb)(struct cmdq_cb_data data);
+
+struct cmdq_task_cb {
+        cmdq_async_flush_cb     cb;
+        void                    *data;
+};
+
+struct cmdq_pkt {
+        void                    *va_base;
+        dma_addr_t              pa_base;
+        size_t                  cmd_buf_size; /* command occupied size */
+        size_t                  buf_size; /* real buffer size */
+        struct cmdq_task_cb     cb;
+        struct cmdq_task_cb     async_cb;
+        void                    *cl;
+};
+
+#endif /* __MTK_CMDQ_MAILBOX_H__ */