[net-next-2.6.git] / drivers / serial / crisv10.h

/*
 * serial.h: Arch-dep definitions for the Etrax100 serial driver.
 *
 * Copyright (C) 1998-2007 Axis Communications AB
 */

#ifndef _ETRAX_SERIAL_H
#define _ETRAX_SERIAL_H

#include <linux/circ_buf.h>
#include <asm/termios.h>
#include <asm/dma.h>
#include <arch/io_interface_mux.h>

/* Software state per channel */

#ifdef __KERNEL__
/*
 * This is our internal structure for each serial port's state.
 *
 * Many fields are paralleled by the structure used by the serial_struct
 * structure.
 *
 * For definitions of the flags field, see tty.h
 */

#define SERIAL_RECV_DESCRIPTORS 8

struct etrax_recv_buffer {
	struct etrax_recv_buffer *next;
	unsigned short length;
	unsigned char error;
	unsigned char pad;

	unsigned char buffer[0];
};

struct e100_serial {
	struct tty_port port;
	int baud;
	volatile u8	*ioport;	/* R_SERIALx_CTRL */
	u32		irq;	/* bitnr in R_IRQ_MASK2 for dmaX_descr */

	/* Output registers */
	volatile u8 *oclrintradr;	/* adr to R_DMA_CHx_CLR_INTR */
	volatile u32 *ofirstadr;	/* adr to R_DMA_CHx_FIRST */
	volatile u8 *ocmdadr;		/* adr to R_DMA_CHx_CMD */
	const volatile u8 *ostatusadr;	/* adr to R_DMA_CHx_STATUS */

	/* Input registers */
	volatile u8 *iclrintradr;	/* adr to R_DMA_CHx_CLR_INTR */
	volatile u32 *ifirstadr;	/* adr to R_DMA_CHx_FIRST */
	volatile u8 *icmdadr;		/* adr to R_DMA_CHx_CMD */
	volatile u32 *idescradr;	/* adr to R_DMA_CHx_DESCR */

	int flags;	/* defined in tty.h */

	u8 rx_ctrl;	/* shadow for R_SERIALx_REC_CTRL */
	u8 tx_ctrl;	/* shadow for R_SERIALx_TR_CTRL */
	u8 iseteop;	/* bit number for R_SET_EOP for the input dma */
	int enabled;	/* Set to 1 if the port is enabled in HW config */

	u8 dma_out_enabled;	/* Set to 1 if DMA should be used */
	u8 dma_in_enabled;	/* Set to 1 if DMA should be used */

	/* end of fields defined in rs_table[] in .c-file */
	int		dma_owner;
	unsigned int	dma_in_nbr;
	unsigned int	dma_out_nbr;
	unsigned int	dma_in_irq_nbr;
	unsigned int	dma_out_irq_nbr;
	unsigned long	dma_in_irq_flags;
	unsigned long	dma_out_irq_flags;
	char		*dma_in_irq_description;
	char		*dma_out_irq_description;

	enum cris_io_interface io_if;
	char            *io_if_description;

	u8		uses_dma_in;  /* Set to 1 if DMA is used */
	u8		uses_dma_out; /* Set to 1 if DMA is used */
	u8		forced_eop;   /* a fifo eop has been forced */
	int			baud_base;     /* For special baudrates */
	int			custom_divisor; /* For special baudrates */
	struct etrax_dma_descr	tr_descr;
	struct etrax_dma_descr	rec_descr[SERIAL_RECV_DESCRIPTORS];
	int			cur_rec_descr;

	volatile int		tr_running; /* 1 if output is running */

	struct tty_struct	*tty;
	int			read_status_mask;
	int			ignore_status_mask;
	int			x_char;	/* xon/xoff character */
	int			close_delay;
	unsigned short		closing_wait;
	unsigned short		closing_wait2;
	unsigned long		event;
	unsigned long		last_active;
	int			line;
	int			type;  /* PORT_ETRAX */
	int			count;	    /* # of fd on device */
	int			blocked_open; /* # of blocked opens */
	struct circ_buf		xmit;
	struct etrax_recv_buffer *first_recv_buffer;
	struct etrax_recv_buffer *last_recv_buffer;
	unsigned int		recv_cnt;
	unsigned int		max_recv_cnt;

	struct work_struct	work;
	struct async_icount	icount;   /* error-statistics etc.*/
	struct ktermios		normal_termios;
	struct ktermios		callout_termios;
	wait_queue_head_t	open_wait;
	wait_queue_head_t	close_wait;

	unsigned long char_time_usec;       /* The time for 1 char, in usecs */
	unsigned long flush_time_usec;      /* How often we should flush */
	unsigned long last_tx_active_usec;  /* Last tx usec in the jiffies */
	unsigned long last_tx_active;       /* Last tx time in jiffies */
	unsigned long last_rx_active_usec;  /* Last rx usec in the jiffies */
	unsigned long last_rx_active;       /* Last rx time in jiffies */

	int break_detected_cnt;
	int errorcode;

#ifdef CONFIG_ETRAX_RS485
	struct serial_rs485	rs485;  /* RS-485 support */
#endif
};

/* this PORT is not in the standard serial.h. it's not actually used for
 * anything since we only have one type of async serial-port anyway in this
 * system.
 */

#define PORT_ETRAX 1

/*
 * Events are used to schedule things to happen at timer-interrupt
 * time, instead of at rs interrupt time.
 */
#define RS_EVENT_WRITE_WAKEUP	0

#endif /* __KERNEL__ */

#endif /* !_ETRAX_SERIAL_H */
Commit	Line	Data
77accbf5 JN	1	/*
	2	* serial.h: Arch-dep definitions for the Etrax100 serial driver.
	3	*
	4	* Copyright (C) 1998-2007 Axis Communications AB
	5	*/
	6
	7	#ifndef _ETRAX_SERIAL_H
	8	#define _ETRAX_SERIAL_H
	9
	10	#include <linux/circ_buf.h>
	11	#include <asm/termios.h>
	12	#include <asm/dma.h>
556dcee7	13	#include <arch/io_interface_mux.h>
77accbf5 JN	14
	15	/* Software state per channel */
	16
	17	#ifdef __KERNEL__
	18	/*
	19	* This is our internal structure for each serial port's state.
	20	*
	21	* Many fields are paralleled by the structure used by the serial_struct
	22	* structure.
	23	*
	24	* For definitions of the flags field, see tty.h
	25	*/
	26
	27	#define SERIAL_RECV_DESCRIPTORS 8
	28
	29	struct etrax_recv_buffer {
	30	struct etrax_recv_buffer *next;
	31	unsigned short length;
	32	unsigned char error;
	33	unsigned char pad;
	34
	35	unsigned char buffer[0];
	36	};
	37
	38	struct e100_serial {
d7283353	39	struct tty_port port;
77accbf5	40	int baud;
d7283353	41	volatile u8 ioport; / R_SERIALx_CTRL */
77accbf5 JN	42	u32 irq; /* bitnr in R_IRQ_MASK2 for dmaX_descr */
	43
	44	/* Output registers */
	45	volatile u8 oclrintradr; / adr to R_DMA_CHx_CLR_INTR */
	46	volatile u32 ofirstadr; / adr to R_DMA_CHx_FIRST */
	47	volatile u8 ocmdadr; / adr to R_DMA_CHx_CMD */
	48	const volatile u8 ostatusadr; / adr to R_DMA_CHx_STATUS */
	49
	50	/* Input registers */
	51	volatile u8 iclrintradr; / adr to R_DMA_CHx_CLR_INTR */
	52	volatile u32 ifirstadr; / adr to R_DMA_CHx_FIRST */
	53	volatile u8 icmdadr; / adr to R_DMA_CHx_CMD */
	54	volatile u32 idescradr; / adr to R_DMA_CHx_DESCR */
	55
	56	int flags; /* defined in tty.h */
	57
	58	u8 rx_ctrl; /* shadow for R_SERIALx_REC_CTRL */
	59	u8 tx_ctrl; /* shadow for R_SERIALx_TR_CTRL */
	60	u8 iseteop; /* bit number for R_SET_EOP for the input dma */
	61	int enabled; /* Set to 1 if the port is enabled in HW config */
	62
	63	u8 dma_out_enabled; /* Set to 1 if DMA should be used */
	64	u8 dma_in_enabled; /* Set to 1 if DMA should be used */
	65
	66	/* end of fields defined in rs_table[] in .c-file */
	67	int dma_owner;
	68	unsigned int dma_in_nbr;
	69	unsigned int dma_out_nbr;
	70	unsigned int dma_in_irq_nbr;
	71	unsigned int dma_out_irq_nbr;
	72	unsigned long dma_in_irq_flags;
	73	unsigned long dma_out_irq_flags;
	74	char *dma_in_irq_description;
	75	char *dma_out_irq_description;
	76
	77	enum cris_io_interface io_if;
	78	char *io_if_description;
	79
	80	u8 uses_dma_in; /* Set to 1 if DMA is used */
	81	u8 uses_dma_out; /* Set to 1 if DMA is used */
	82	u8 forced_eop; /* a fifo eop has been forced */
	83	int baud_base; /* For special baudrates */
	84	int custom_divisor; /* For special baudrates */
	85	struct etrax_dma_descr tr_descr;
	86	struct etrax_dma_descr rec_descr[SERIAL_RECV_DESCRIPTORS];
	87	int cur_rec_descr;
	88
	89	volatile int tr_running; /* 1 if output is running */
	90
	91	struct tty_struct *tty;
	92	int read_status_mask;
	93	int ignore_status_mask;
	94	int x_char; /* xon/xoff character */
	95	int close_delay;
	96	unsigned short closing_wait;
	97	unsigned short closing_wait2;
	98	unsigned long event;
	99	unsigned long last_active;
	100	int line;
	101	int type; /* PORT_ETRAX */
	102	int count; /* # of fd on device */
	103	int blocked_open; /* # of blocked opens */
	104	struct circ_buf xmit;
	105	struct etrax_recv_buffer *first_recv_buffer;
106	struct etrax_recv_buffer *last_recv_buffer;
107	unsigned int recv_cnt;
108	unsigned int max_recv_cnt;
109
110	struct work_struct work;
111	struct async_icount icount; /* error-statistics etc.*/
112	struct ktermios normal_termios;
113	struct ktermios callout_termios;
114	wait_queue_head_t open_wait;
115	wait_queue_head_t close_wait;
116
117	unsigned long char_time_usec; /* The time for 1 char, in usecs */
118	unsigned long flush_time_usec; /* How often we should flush */
119	unsigned long last_tx_active_usec; /* Last tx usec in the jiffies */
120	unsigned long last_tx_active; /* Last tx time in jiffies */
121	unsigned long last_rx_active_usec; /* Last rx usec in the jiffies */
122	unsigned long last_rx_active; /* Last rx time in jiffies */
123
124	int break_detected_cnt;
125	int errorcode;
126
127	#ifdef CONFIG_ETRAX_RS485
6fd1af4c	128	struct serial_rs485 rs485; /* RS-485 support */
77accbf5 JN	129	#endif
	130	};
	131
	132	/* this PORT is not in the standard serial.h. it's not actually used for
	133	* anything since we only have one type of async serial-port anyway in this
	134	* system.
	135	*/
	136
	137	#define PORT_ETRAX 1
	138
	139	/*
	140	* Events are used to schedule things to happen at timer-interrupt
	141	* time, instead of at rs interrupt time.
	142	*/
	143	#define RS_EVENT_WRITE_WAKEUP 0
	144
	145	#endif /* __KERNEL__ */
	146
	147	#endif /* !_ETRAX_SERIAL_H */