2 * Copyright (c) 2014 The DragonFly Project. All rights reserved.
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@backplane.com> and was subsequently ported
6 * to FreeBSD by Michael Gmelin <freebsd@grem.de>
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
18 * 3. Neither the name of The DragonFly Project nor the names of its
19 * contributors may be used to endorse or promote products derived
20 * from this software without specific, prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
24 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
25 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
26 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
27 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
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38 #ifndef _ICHIIC_IG4_VAR_H_
39 #define _ICHIIC_IG4_VAR_H_
42 #include "device_if.h"
44 #include "iicbus_if.h"
46 enum ig4_vers { IG4_HASWELL, IG4_ATOM, IG4_SKYLAKE, IG4_APL, IG4_CANNONLAKE };
47 /* Controller has additional registers */
48 #define IG4_HAS_ADDREGS(vers) ((vers) == IG4_SKYLAKE || \
49 (vers) == IG4_APL || (vers) == IG4_CANNONLAKE)
52 uint32_t ic_clock_rate; /* MHz */
53 uint32_t sda_fall_time; /* nsec */
54 uint32_t scl_fall_time; /* nsec */
55 uint32_t sda_hold_time; /* nsec */
76 struct resource *regs_res;
78 struct resource *intr_res;
82 enum ig4_vers version;
86 int platform_attached : 1;
94 * Functions implementing the icbus interface that interact
95 * with the controller acquire an exclusive lock on call_lock
96 * to prevent interleaving of calls to the interface.
98 * io_lock is used as condition variable to synchronize active process
99 * with the interrupt handler. It should not be used for tasks other
100 * than waiting for interrupt and passing parameters to and from
107 typedef struct ig4iic_softc ig4iic_softc_t;
109 extern devclass_t ig4iic_devclass;
111 /* Attach/Detach called from ig4iic_pci_*() */
112 int ig4iic_attach(ig4iic_softc_t *sc);
113 int ig4iic_detach(ig4iic_softc_t *sc);
114 int ig4iic_suspend(ig4iic_softc_t *sc);
115 int ig4iic_resume(ig4iic_softc_t *sc);
118 extern iicbus_transfer_t ig4iic_transfer;
119 extern iicbus_reset_t ig4iic_reset;
120 extern iicbus_callback_t ig4iic_callback;
122 #endif /* _ICHIIC_IG4_VAR_H_ */