Release 4.14 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 */
	
unsigned int	inbuf_pktlen;	/* packet lenght 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 */
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Directory: arch/powerpc/include/asm

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