[linux-2.6-block.git] / arch / powerpc / include / asm / hvsi.h

/* 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 */
	size_t		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 */
	ssize_t (*get_chars)(uint32_t termno, u8 *buf, size_t count);
	ssize_t (*put_chars)(uint32_t termno, const u8 *buf, size_t count);
	uint32_t	termno;
};

/* hvsi lib functions */
struct hvc_struct;
extern void hvsilib_init(struct hvsi_priv *pv,
			 ssize_t (*get_chars)(uint32_t termno, u8 *buf,
					      size_t count),
			 ssize_t (*put_chars)(uint32_t termno, const u8 *buf,
					      size_t 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 ssize_t hvsilib_get_chars(struct hvsi_priv *pv, u8 *buf, size_t count);
extern ssize_t hvsilib_put_chars(struct hvsi_priv *pv, const u8 *buf,
				 size_t count);

#endif /* _HVSI_H */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
725e789f BH	2	#ifndef _HVSI_H
	3	#define _HVSI_H
	4
	5	#define VS_DATA_PACKET_HEADER 0xff
	6	#define VS_CONTROL_PACKET_HEADER 0xfe
	7	#define VS_QUERY_PACKET_HEADER 0xfd
	8	#define VS_QUERY_RESPONSE_PACKET_HEADER 0xfc
	9
	10	/* control verbs */
	11	#define VSV_SET_MODEM_CTL 1 /* to service processor only */
	12	#define VSV_MODEM_CTL_UPDATE 2 /* from service processor only */
	13	#define VSV_CLOSE_PROTOCOL 3
	14
	15	/* query verbs */
	16	#define VSV_SEND_VERSION_NUMBER 1
	17	#define VSV_SEND_MODEM_CTL_STATUS 2
	18
	19	/* yes, these masks are not consecutive. */
	20	#define HVSI_TSDTR 0x01
	21	#define HVSI_TSCD 0x20
	22
	23	#define HVSI_MAX_OUTGOING_DATA 12
	24	#define HVSI_VERSION 1
	25
	26	struct hvsi_header {
	27	uint8_t type;
	28	uint8_t len;
99fc1d91	29	__be16 seqno;
725e789f BH	30	} __attribute__((packed));
	31
	32	struct hvsi_data {
048bee77	33	struct hvsi_header hdr;
725e789f BH	34	uint8_t data[HVSI_MAX_OUTGOING_DATA];
	35	} __attribute__((packed));
	36
	37	struct hvsi_control {
048bee77	38	struct hvsi_header hdr;
99fc1d91	39	__be16 verb;
725e789f	40	/* optional depending on verb: */
99fc1d91 BH	41	__be32 word;
99fc1d91 BH	42	__be32 mask;
725e789f BH	43	} __attribute__((packed));
	44
	45	struct hvsi_query {
048bee77	46	struct hvsi_header hdr;
99fc1d91	47	__be16 verb;
725e789f BH	48	} __attribute__((packed));
	49
	50	struct hvsi_query_response {
048bee77	51	struct hvsi_header hdr;
99fc1d91 BH	52	__be16 verb;
99fc1d91 BH	53	__be16 query_seqno;
725e789f BH	54	union {
725e789f BH	55	uint8_t version;
99fc1d91	56	__be32 mctrl_word;
725e789f BH	57	} u;
	58	} __attribute__((packed));
	59
17bdc6c0 BH	60	/* hvsi lib struct definitions */
	61	#define HVSI_INBUF_SIZE 255
	62	struct tty_struct;
	63	struct hvsi_priv {
	64	unsigned int inbuf_len; /* data in input buffer */
	65	unsigned char inbuf[HVSI_INBUF_SIZE];
	66	unsigned int inbuf_cur; /* Cursor in input buffer */
f32fcbed	67	size_t inbuf_pktlen; /* packet length from cursor */
17bdc6c0 BH	68	atomic_t seqno; /* packet sequence number */
	69	unsigned int opened:1; /* driver opened */
	70	unsigned int established:1; /* protocol established */
	71	unsigned int is_console:1; /* used as a kernel console device */
	72	unsigned int mctrl_update:1; /* modem control updated */
	73	unsigned short mctrl; /* modem control */
	74	struct tty_struct tty; / tty structure */
f32fcbed JSS	75	ssize_t (get_chars)(uint32_t termno, u8 buf, size_t count);
f32fcbed JSS	76	ssize_t (put_chars)(uint32_t termno, const u8 buf, size_t count);
17bdc6c0 BH	77	uint32_t termno;
	78	};
	79
	80	/* hvsi lib functions */
	81	struct hvc_struct;
87fa35dd	82	extern void hvsilib_init(struct hvsi_priv *pv,
f32fcbed JSS	83	ssize_t (get_chars)(uint32_t termno, u8 buf,
	84	size_t count),
	85	ssize_t (put_chars)(uint32_t termno, const u8 buf,
	86	size_t count),
87fa35dd BH	87	int termno, int is_console);
	88	extern int hvsilib_open(struct hvsi_priv pv, struct hvc_struct hp);
	89	extern void hvsilib_close(struct hvsi_priv pv, struct hvc_struct hp);
	90	extern int hvsilib_read_mctrl(struct hvsi_priv *pv);
	91	extern int hvsilib_write_mctrl(struct hvsi_priv *pv, int dtr);
	92	extern void hvsilib_establish(struct hvsi_priv *pv);
f32fcbed JSS	93	extern ssize_t hvsilib_get_chars(struct hvsi_priv pv, u8 buf, size_t count);
	94	extern ssize_t hvsilib_put_chars(struct hvsi_priv pv, const u8 buf,
	95	size_t count);
725e789f BH	96
725e789f BH	97	#endif /* _HVSI_H */