1 files changed, 135 insertions, 0 deletions
diff --git a/drivers/net/wwan/t7xx/t7xx_state_monitor.h b/drivers/net/wwan/t7xx/t7xx_state_monitor.h
new file mode 100644
index 000000000000..b1af0259d4c5
--- /dev/null
+++ b/drivers/net/wwan/t7xx/t7xx_state_monitor.h
@@ -0,0 +1,135 @@
+/* SPDX-License-Identifier: GPL-2.0-only
+ *
+ * Copyright (c) 2021, MediaTek Inc.
+ * Copyright (c) 2021-2022, Intel Corporation.
+ *
+ * Authors:
+ *  Amir Hanania <amir.hanania@intel.com>
+ *  Haijun Liu <haijun.liu@mediatek.com>
+ *  Moises Veleta <moises.veleta@intel.com>
+ *
+ * Contributors:
+ *  Eliot Lee <eliot.lee@intel.com>
+ *  Ricardo Martinez <ricardo.martinez@linux.intel.com>
+ *  Sreehari Kancharla <sreehari.kancharla@intel.com>
+ */
+
+#ifndef __T7XX_MONITOR_H__
+#define __T7XX_MONITOR_H__
+
+#include <linux/bits.h>
+#include <linux/sched.h>
+#include <linux/spinlock.h>
+#include <linux/types.h>
+#include <linux/wait.h>
+
+#include "t7xx_modem_ops.h"
+
+enum t7xx_fsm_state {
+	FSM_STATE_INIT,
+	FSM_STATE_PRE_START,
+	FSM_STATE_STARTING,
+	FSM_STATE_READY,
+	FSM_STATE_EXCEPTION,
+	FSM_STATE_STOPPING,
+	FSM_STATE_STOPPED,
+};
+
+enum t7xx_fsm_event_state {
+	FSM_EVENT_INVALID,
+	FSM_EVENT_MD_HS2,
+	FSM_EVENT_MD_EX,
+	FSM_EVENT_MD_EX_REC_OK,
+	FSM_EVENT_MD_EX_PASS,
+	FSM_EVENT_MD_HS2_EXIT,
+	FSM_EVENT_MAX
+};
+
+enum t7xx_fsm_cmd_state {
+	FSM_CMD_INVALID,
+	FSM_CMD_START,
+	FSM_CMD_EXCEPTION,
+	FSM_CMD_PRE_STOP,
+	FSM_CMD_STOP,
+};
+
+enum t7xx_ex_reason {
+	EXCEPTION_HS_TIMEOUT,
+	EXCEPTION_EVENT,
+};
+
+enum t7xx_md_irq_type {
+	MD_IRQ_WDT,
+	MD_IRQ_CCIF_EX,
+	MD_IRQ_PORT_ENUM,
+};
+
+enum md_state {
+	MD_STATE_INVALID,
+	MD_STATE_WAITING_FOR_HS1,
+	MD_STATE_WAITING_FOR_HS2,
+	MD_STATE_READY,
+	MD_STATE_EXCEPTION,
+	MD_STATE_WAITING_TO_STOP,
+	MD_STATE_STOPPED,
+};
+
+#define FSM_CMD_FLAG_WAIT_FOR_COMPLETION	BIT(0)
+#define FSM_CMD_FLAG_FLIGHT_MODE		BIT(1)
+#define FSM_CMD_FLAG_IN_INTERRUPT		BIT(2)
+#define FSM_CMD_EX_REASON			GENMASK(23, 16)
+
+struct t7xx_fsm_ctl {
+	struct t7xx_modem	*md;
+	enum md_state		md_state;
+	unsigned int		curr_state;
+	struct list_head	command_queue;
+	struct list_head	event_queue;
+	wait_queue_head_t	command_wq;
+	wait_queue_head_t	event_wq;
+	wait_queue_head_t	async_hk_wq;
+	spinlock_t		event_lock;		/* Protects event queue */
+	spinlock_t		command_lock;		/* Protects command queue */
+	struct task_struct	*fsm_thread;
+	bool			exp_flg;
+	spinlock_t		notifier_lock;		/* Protects notifier list */
+	struct list_head	notifier_list;
+};
+
+struct t7xx_fsm_event {
+	struct list_head	entry;
+	enum t7xx_fsm_event_state event_id;
+	unsigned int		length;
+	unsigned char		data[];
+};
+
+struct t7xx_fsm_command {
+	struct list_head	entry;
+	enum t7xx_fsm_cmd_state	cmd_id;
+	unsigned int		flag;
+	struct completion	*done;
+	int			*ret;
+};
+
+struct t7xx_fsm_notifier {
+	struct list_head	entry;
+	int (*notifier_fn)(enum md_state state, void *data);
+	void			*data;
+};
+
+int t7xx_fsm_append_cmd(struct t7xx_fsm_ctl *ctl, enum t7xx_fsm_cmd_state cmd_id,
+			unsigned int flag);
+int t7xx_fsm_append_event(struct t7xx_fsm_ctl *ctl, enum t7xx_fsm_event_state event_id,
+			  unsigned char *data, unsigned int length);
+void t7xx_fsm_clr_event(struct t7xx_fsm_ctl *ctl, enum t7xx_fsm_event_state event_id);
+void t7xx_fsm_broadcast_state(struct t7xx_fsm_ctl *ctl, enum md_state state);
+void t7xx_fsm_reset(struct t7xx_modem *md);
+int t7xx_fsm_init(struct t7xx_modem *md);
+void t7xx_fsm_uninit(struct t7xx_modem *md);
+int t7xx_fsm_recv_md_intr(struct t7xx_fsm_ctl *ctl, enum t7xx_md_irq_type type);
+enum md_state t7xx_fsm_get_md_state(struct t7xx_fsm_ctl *ctl);
+unsigned int t7xx_fsm_get_ctl_state(struct t7xx_fsm_ctl *ctl);
+void t7xx_fsm_notifier_register(struct t7xx_modem *md, struct t7xx_fsm_notifier *notifier);
+void t7xx_fsm_notifier_unregister(struct t7xx_modem *md, struct t7xx_fsm_notifier *notifier);
+
+#endif /* __T7XX_MONITOR_H__ */