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@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