1 files changed, 71 insertions, 0 deletions
diff --git a/drivers/modem/m6718_spi/modem_statemachine.h b/drivers/modem/m6718_spi/modem_statemachine.h
new file mode 100644
index 00000000000..6a2a32cad3a
--- /dev/null
+++ b/drivers/modem/m6718_spi/modem_statemachine.h
@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) ST-Ericsson SA 2011
+ *
+ * Author: Chris Blair <chris.blair@stericsson.com> for ST-Ericsson
+ *
+ * License terms: GNU General Public License (GPL) version 2
+ *
+ * Modem IPC driver protocol interface header:
+ *   statemachine functionality.
+ */
+#ifndef _MODEM_STATEMACHINE_H_
+#define _MODEM_STATEMACHINE_H_
+
+#include <linux/kernel.h>
+
+/* valid states for the driver state machine */
+enum ipc_sm_state_id {
+	IPC_SM_INIT,
+	IPC_SM_HALT,
+	IPC_SM_RESET,
+	IPC_SM_WAIT_SLAVE_STABLE,
+	IPC_SM_WAIT_HANDSHAKE_INACTIVE,
+	IPC_SM_SLW_TX_BOOTREQ,
+	IPC_SM_ACT_TX_BOOTREQ,
+	IPC_SM_SLW_RX_BOOTRESP,
+	IPC_SM_ACT_RX_BOOTRESP,
+	IPC_SM_IDL,
+	IPC_SM_SLW_TX_WR_CMD,
+	IPC_SM_ACT_TX_WR_CMD,
+	IPC_SM_SLW_TX_WR_DAT,
+	IPC_SM_ACT_TX_WR_DAT,
+	IPC_SM_SLW_TX_RD_CMD,
+	IPC_SM_ACT_TX_RD_CMD,
+	IPC_SM_SLW_RX_WR_CMD,
+	IPC_SM_ACT_RX_WR_CMD,
+	IPC_SM_ACT_RX_WR_DAT,
+	IPC_SM_STATE_ID_NBR
+};
+
+/* state machine trigger causes events */
+#define IPC_SM_RUN_NONE         (0x00)
+#define IPC_SM_RUN_SLAVE_IRQ    (0x01)
+#define IPC_SM_RUN_TFR_COMPLETE (0x02)
+#define IPC_SM_RUN_TX_REQ       (0x04)
+#define IPC_SM_RUN_INIT         (0x08)
+#define IPC_SM_RUN_ABORT        (0x10)
+#define IPC_SM_RUN_COMMS_TMO    (0x20)
+#define IPC_SM_RUN_STABLE_TMO   (0x40)
+#define IPC_SM_RUN_RESET        (0x80)
+
+struct ipc_link_context; /* forward declaration */
+
+typedef u8 (*ipc_sm_enter_func)(u8 event, struct ipc_link_context *context);
+typedef const struct ipc_sm_state *(*ipc_sm_exit_func)(u8 event,
+					struct ipc_link_context *context);
+
+struct ipc_sm_state {
+	enum ipc_sm_state_id id;
+	ipc_sm_enter_func enter;
+	ipc_sm_exit_func exit;
+	u8 events;
+};
+
+const struct ipc_sm_state *ipc_sm_idle_state(struct ipc_link_context *context);
+const struct ipc_sm_state *ipc_sm_init_state(struct ipc_link_context *context);
+const struct ipc_sm_state *ipc_sm_state(u8 id);
+bool ipc_sm_valid_for_state(u8 event, const struct ipc_sm_state *state);
+
+void ipc_sm_kick(u8 event, struct ipc_link_context *context);
+
+#endif /* _MODEM_STATEMACHINE_H_ */