6305020526
Make that distinction more explicit and regular in the code. The difference in behavior is documented in the respective datasheets. Previously, the code handled the distinction by writing the control register multiple times where at least one write was zero and another was one. This can be considered a follow-up to r363021. Reviewed by: manu MFC after: 4 weeks Differential Revision: https://reviews.freebsd.org/D26308
89 lines
2.5 KiB
C
89 lines
2.5 KiB
C
/*-
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* Copyright (C) 2008 MARVELL INTERNATIONAL LTD.
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* All rights reserved.
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*
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* Developed by Semihalf.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of MARVELL nor the names of contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _TWSI_H_
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#define _TWSI_H_
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#ifdef EXT_RESOURCES
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#include <dev/extres/clk/clk.h>
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#endif
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struct twsi_baud_rate {
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uint32_t raw;
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int param;
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int m;
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int n;
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};
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struct twsi_softc {
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device_t dev;
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struct resource *res[2];
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struct mtx mutex;
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device_t iicbus;
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#ifdef EXT_RESOURCES
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clk_t clk_core;
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clk_t clk_reg;
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#endif
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void * intrhand;
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bool have_intr;
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struct iic_msg *msgs;
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uint32_t nmsgs;
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uint32_t msg_idx;
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uint16_t sent_bytes;
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uint16_t recv_bytes;
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int transfer;
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int error;
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uint32_t control_val;
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bool need_ack;
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bool iflag_w1c;
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bus_size_t reg_data;
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bus_size_t reg_slave_addr;
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bus_size_t reg_slave_ext_addr;
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bus_size_t reg_control;
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bus_size_t reg_status;
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bus_size_t reg_baud_rate;
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bus_size_t reg_soft_reset;
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struct twsi_baud_rate baud_rate[IIC_FASTEST + 1];
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};
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DECLARE_CLASS(twsi_driver);
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#define TWSI_BAUD_RATE_PARAM(M,N) ((((M) << 3) | ((N) & 0x7)) & 0x7f)
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int twsi_attach(device_t);
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int twsi_detach(device_t);
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#endif /* _TWSI_H_ */
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