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      1 /*	$NetBSD: pxa2x0_i2c.h,v 1.5 2011/08/06 03:42:11 kiyohara Exp $	*/
      2 /*	$OpenBSD: pxa2x0_i2c.h,v 1.2 2005/05/26 03:52:07 pascoe Exp $	*/
      3 
      4 /*
      5  * Copyright (c) 2005 Christopher Pascoe <pascoe (at) openbsd.org>
      6  *
      7  * Permission to use, copy, modify, and distribute this software for any
      8  * purpose with or without fee is hereby granted, provided that the above
      9  * copyright notice and this permission notice appear in all copies.
     10  *
     11  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
     12  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
     13  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
     14  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
     15  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
     16  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
     17  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
     18  */
     19 
     20 #ifndef _PXA2X0_I2C_H_
     21 #define _PXA2X0_I2C_H_
     22 
     23 #include <sys/bus.h>
     24 
     25 struct pxa2x0_i2c_softc {
     26 	device_t sc_dev;
     27 	bus_space_tag_t sc_iot;
     28 	bus_space_handle_t sc_ioh;
     29 
     30 	bus_addr_t sc_addr;
     31 	bus_size_t sc_size;
     32 
     33 	uint32_t sc_icr;
     34 	uint32_t sc_isar;	/* I2C Slave Address */
     35 
     36 	enum {
     37 		PI2C_STAT_UNKNOWN = -2,
     38 		PI2C_STAT_ERROR = -1,
     39 		PI2C_STAT_INIT = 0,
     40 		PI2C_STAT_SEND,
     41 		PI2C_STAT_RECEIVE,
     42 		PI2C_STAT_STOP,
     43 	} sc_stat;
     44 
     45 	uint32_t sc_flags;
     46 #define	PI2CF_FAST_MODE		(1U << 0)
     47 };
     48 
     49 int	pxa2x0_i2c_attach_sub(struct pxa2x0_i2c_softc *);
     50 int	pxa2x0_i2c_detach_sub(struct pxa2x0_i2c_softc *);
     51 void	pxa2x0_i2c_init(struct pxa2x0_i2c_softc *);
     52 void	pxa2x0_i2c_open(struct pxa2x0_i2c_softc *);
     53 void	pxa2x0_i2c_close(struct pxa2x0_i2c_softc *);
     54 int	pxa2x0_i2c_read(struct pxa2x0_i2c_softc *, u_char, u_char *);
     55 int	pxa2x0_i2c_write(struct pxa2x0_i2c_softc *, u_char, u_char);
     56 int	pxa2x0_i2c_write_2(struct pxa2x0_i2c_softc *, u_char, u_short);
     57 int	pxa2x0_i2c_quick(struct pxa2x0_i2c_softc *, u_char, u_char);
     58 
     59 int	pxa2x0_i2c_send_start(struct pxa2x0_i2c_softc *, int flags);
     60 int	pxa2x0_i2c_send_stop(struct pxa2x0_i2c_softc *, int flags);
     61 int	pxa2x0_i2c_initiate_xfer(struct pxa2x0_i2c_softc *, uint16_t, int);
     62 int	pxa2x0_i2c_read_byte(struct pxa2x0_i2c_softc *, uint8_t *, int);
     63 int	pxa2x0_i2c_write_byte(struct pxa2x0_i2c_softc *, uint8_t, int);
     64 
     65 void	pxa2x0_i2c_reset(struct pxa2x0_i2c_softc *);
     66 int	pxa2x0_i2c_wait(struct pxa2x0_i2c_softc *, int, int);
     67 
     68 int	pxa2x0_i2c_poll(struct pxa2x0_i2c_softc *, int, char *, int);
     69 int	pxa2x0_i2c_intr_sub(struct pxa2x0_i2c_softc *, int *, uint8_t *);
     70 
     71 #endif	/* _PXA2X0_I2C_H_ */
     72