1 files changed, 95 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/hvsi.h b/arch/powerpc/include/asm/hvsi.h
new file mode 100644
index 000000000..464a7519e
--- /dev/null
+++ b/arch/powerpc/include/asm/hvsi.h
@@ -0,0 +1,95 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _HVSI_H
+#define _HVSI_H
+
+#define VS_DATA_PACKET_HEADER           0xff
+#define VS_CONTROL_PACKET_HEADER        0xfe
+#define VS_QUERY_PACKET_HEADER          0xfd
+#define VS_QUERY_RESPONSE_PACKET_HEADER 0xfc
+
+/* control verbs */
+#define VSV_SET_MODEM_CTL    1 /* to service processor only */
+#define VSV_MODEM_CTL_UPDATE 2 /* from service processor only */
+#define VSV_CLOSE_PROTOCOL   3
+
+/* query verbs */
+#define VSV_SEND_VERSION_NUMBER 1
+#define VSV_SEND_MODEM_CTL_STATUS 2
+
+/* yes, these masks are not consecutive. */
+#define HVSI_TSDTR 0x01
+#define HVSI_TSCD  0x20
+
+#define HVSI_MAX_OUTGOING_DATA 12
+#define HVSI_VERSION 1
+
+struct hvsi_header {
+	uint8_t  type;
+	uint8_t  len;
+	__be16 seqno;
+} __attribute__((packed));
+
+struct hvsi_data {
+	struct hvsi_header hdr;
+	uint8_t  data[HVSI_MAX_OUTGOING_DATA];
+} __attribute__((packed));
+
+struct hvsi_control {
+	struct hvsi_header hdr;
+	__be16 verb;
+	/* optional depending on verb: */
+	__be32 word;
+	__be32 mask;
+} __attribute__((packed));
+
+struct hvsi_query {
+	struct hvsi_header hdr;
+	__be16 verb;
+} __attribute__((packed));
+
+struct hvsi_query_response {
+	struct hvsi_header hdr;
+	__be16 verb;
+	__be16 query_seqno;
+	union {
+		uint8_t  version;
+		__be32 mctrl_word;
+	} u;
+} __attribute__((packed));
+
+/* hvsi lib struct definitions */
+#define HVSI_INBUF_SIZE		255
+struct tty_struct;
+struct hvsi_priv {
+	unsigned int	inbuf_len;	/* data in input buffer */
+	unsigned char	inbuf[HVSI_INBUF_SIZE];
+	unsigned int	inbuf_cur;	/* Cursor in input buffer */
+	unsigned int	inbuf_pktlen;	/* packet length from cursor */
+	atomic_t	seqno;		/* packet sequence number */
+	unsigned int	opened:1;	/* driver opened */
+	unsigned int	established:1;	/* protocol established */
+	unsigned int 	is_console:1;	/* used as a kernel console device */
+	unsigned int	mctrl_update:1;	/* modem control updated */
+	unsigned short	mctrl;		/* modem control */
+	struct tty_struct *tty;		/* tty structure */
+	int (*get_chars)(uint32_t termno, char *buf, int count);
+	int (*put_chars)(uint32_t termno, const char *buf, int count);
+	uint32_t	termno;
+};
+
+/* hvsi lib functions */
+struct hvc_struct;
+extern void hvsilib_init(struct hvsi_priv *pv,
+			 int (*get_chars)(uint32_t termno, char *buf, int count),
+			 int (*put_chars)(uint32_t termno, const char *buf,
+					  int count),
+			 int termno, int is_console);
+extern int hvsilib_open(struct hvsi_priv *pv, struct hvc_struct *hp);
+extern void hvsilib_close(struct hvsi_priv *pv, struct hvc_struct *hp);
+extern int hvsilib_read_mctrl(struct hvsi_priv *pv);
+extern int hvsilib_write_mctrl(struct hvsi_priv *pv, int dtr);
+extern void hvsilib_establish(struct hvsi_priv *pv);
+extern int hvsilib_get_chars(struct hvsi_priv *pv, char *buf, int count);
+extern int hvsilib_put_chars(struct hvsi_priv *pv, const char *buf, int count);
+
+#endif /* _HVSI_H */