1 /* $NetBSD: bcm2835_bscvar.h,v 1.1 2020/03/31 14:39:44 jmcneill Exp $ */ 2 3 /* 4 * Copyright (c) 2019 Jason R. Thorpe 5 * Copyright (c) 2012 Jonathan A. Kollasch 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 18 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 19 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 20 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 21 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 22 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 23 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 24 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 25 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 26 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 27 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 #ifndef _BCM2835_BSCVAR_H 31 #define _BCM2835_BSCVAR_H 32 33 #include <dev/i2c/i2cvar.h> 34 35 typedef enum { 36 BSC_EXEC_STATE_IDLE = 0, 37 BSC_EXEC_STATE_SEND_ADDR = 1, 38 BSC_EXEC_STATE_SEND_CMD = 2, 39 BSC_EXEC_STATE_SEND_DATA = 3, 40 BSC_EXEC_STATE_RECV_DATA = 4, 41 BSC_EXEC_STATE_DONE = 5, 42 BSC_EXEC_STATE_ERROR = 6, 43 } bsc_exec_state_t; 44 45 #define BSC_EXEC_STATE_SENDING(sc) \ 46 ((sc)->sc_exec_state >= BSC_EXEC_STATE_SEND_ADDR && \ 47 (sc)->sc_exec_state <= BSC_EXEC_STATE_SEND_DATA) 48 49 #define BSC_EXEC_STATE_RECEIVING(sc) \ 50 ((sc)->sc_exec_state == BSC_EXEC_STATE_RECV_DATA) 51 52 struct bsciic_softc { 53 device_t sc_dev; 54 bus_space_tag_t sc_iot; 55 bus_space_handle_t sc_ioh; 56 struct i2c_controller sc_i2c; 57 void *sc_inth; 58 59 struct clk *sc_clk; 60 u_int sc_frequency; 61 u_int sc_clkrate; 62 63 kmutex_t sc_intr_lock; 64 kcondvar_t sc_intr_wait; 65 66 struct { 67 i2c_op_t op; 68 i2c_addr_t addr; 69 const void *cmdbuf; 70 size_t cmdlen; 71 void *databuf; 72 size_t datalen; 73 int flags; 74 } sc_exec; 75 76 /* 77 * Everything below here protected by the i2c controller lock 78 * /and/ sc_intr_lock (if we're using interrupts). 79 */ 80 81 bsc_exec_state_t sc_exec_state; 82 83 uint8_t *sc_buf; 84 size_t sc_bufpos; 85 size_t sc_buflen; 86 87 uint32_t sc_c_bits; 88 bool sc_expecting_interrupt; 89 }; 90 91 void bsciic_attach(struct bsciic_softc *); 92 93 int bsciic_acquire_bus(void *, int); 94 void bsciic_release_bus(void *, int); 95 int bsciic_exec(void *, i2c_op_t, i2c_addr_t, const void *, size_t, 96 void *, size_t, int); 97 98 int bsciic_intr(void *); 99 100 #endif /* !_BCM2835_BSCVAR_H */ 101