1 /*- 2 * Copyright (C) 2008 MARVELL INTERNATIONAL LTD. 3 * All rights reserved. 4 * 5 * Developed by Semihalf. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of MARVELL nor the names of contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #ifndef _TWSI_H_ 33 #define _TWSI_H_ 34 35 #include <dev/extres/clk/clk.h> 36 37 struct twsi_baud_rate { 38 uint32_t raw; 39 int param; 40 int m; 41 int n; 42 }; 43 44 struct twsi_softc { 45 device_t dev; 46 struct resource *res[2]; 47 struct mtx mutex; 48 device_t iicbus; 49 clk_t clk_core; 50 clk_t clk_reg; 51 void * intrhand; 52 bool have_intr; 53 54 struct iic_msg *msgs; 55 uint32_t nmsgs; 56 uint32_t msg_idx; 57 uint16_t sent_bytes; 58 uint16_t recv_bytes; 59 int transfer; 60 int error; 61 int debug; 62 uint32_t control_val; 63 bool iflag_w1c; 64 65 bus_size_t reg_data; 66 bus_size_t reg_slave_addr; 67 bus_size_t reg_slave_ext_addr; 68 bus_size_t reg_control; 69 bus_size_t reg_status; 70 bus_size_t reg_baud_rate; 71 bus_size_t reg_soft_reset; 72 struct twsi_baud_rate baud_rate[IIC_FASTEST + 1]; 73 }; 74 75 DECLARE_CLASS(twsi_driver); 76 77 #define TWSI_BAUD_RATE_PARAM(M,N) ((((M) << 3) | ((N) & 0x7)) & 0x7f) 78 79 int twsi_attach(device_t); 80 int twsi_detach(device_t); 81 82 #endif /* _TWSI_H_ */ 83