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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2004-2006 Marcel Moolenaar
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _DEV_SCC_BFE_H_
#define _DEV_SCC_BFE_H_
#include <sys/serial.h>
/*
* Bus access structure. This structure holds the minimum information needed
* to access the SCC. The rclk field, although not important to actually
* access the SCC, is important for baudrate programming, delay loops and
* other timing related computations.
*/
struct scc_bas {
bus_space_tag_t bst;
bus_space_handle_t bsh;
u_int range;
u_int rclk;
u_int regshft;
};
#define scc_regofs(bas, reg) ((reg) << (bas)->regshft)
#define scc_getreg(bas, reg) \
bus_space_read_1((bas)->bst, (bas)->bsh, scc_regofs(bas, reg))
#define scc_setreg(bas, reg, value) \
bus_space_write_1((bas)->bst, (bas)->bsh, scc_regofs(bas, reg), value)
#define scc_barrier(bas) \
bus_space_barrier((bas)->bst, (bas)->bsh, 0, (bas)->range, \
BUS_SPACE_BARRIER_READ|BUS_SPACE_BARRIER_WRITE)
/*
* SCC mode (child) and channel control structures.
*/
#define SCC_NMODES 3
#define SCC_ISRCCNT 5
struct scc_chan;
struct scc_mode {
struct scc_chan *m_chan;
device_t m_dev;
u_int m_mode;
int m_attached:1;
int m_fastintr:1;
int m_hasintr:1;
int m_probed:1;
int m_sysdev:1;
driver_filter_t *ih;
serdev_intr_t *ih_src[SCC_ISRCCNT];
void *ih_arg;
};
struct scc_chan {
struct resource ch_rres;
struct resource_list ch_rlist;
struct resource *ch_ires; /* Interrupt resource. */
void *ch_icookie;
int ch_irid;
struct scc_mode ch_mode[SCC_NMODES];
u_int ch_nr;
int ch_enabled:1;
int ch_sysdev:1;
uint32_t ch_ipend;
uint32_t ch_hwsig;
};
/*
* SCC class & instance (=softc)
*/
struct scc_class {
KOBJ_CLASS_FIELDS;
u_int cl_channels; /* Number of independent channels. */
u_int cl_class; /* SCC bus class ID. */
u_int cl_modes; /* Supported modes (bitset). */
int cl_range;
};
extern struct scc_class scc_quicc_class;
extern struct scc_class scc_z8530_escc_class;
extern struct scc_class scc_z8530_legacy_class;
struct scc_softc {
KOBJ_FIELDS;
struct scc_class *sc_class;
struct scc_bas sc_bas;
device_t sc_dev;
struct mtx sc_hwmtx; /* Spinlock protecting hardware. */
struct resource *sc_rres; /* Register resource. */
int sc_rrid;
int sc_rtype; /* SYS_RES_{IOPORT|MEMORY}. */
struct scc_chan *sc_chan;
int sc_fastintr:1;
int sc_leaving:1;
int sc_polled:1;
uint32_t sc_hwsig; /* Signal state. Used by HW driver. */
};
extern devclass_t scc_devclass;
extern const char scc_driver_name[];
int scc_bfe_attach(device_t dev, u_int ipc);
int scc_bfe_detach(device_t dev);
int scc_bfe_probe(device_t dev, u_int regshft, u_int rclk, u_int rid);
struct resource *scc_bus_alloc_resource(device_t, device_t, int, int *,
rman_res_t, rman_res_t, rman_res_t, u_int);
int scc_bus_get_resource(device_t, device_t, int, int, rman_res_t *, rman_res_t *);
int scc_bus_read_ivar(device_t, device_t, int, uintptr_t *);
int scc_bus_release_resource(device_t, device_t, int, int, struct resource *);
int scc_bus_setup_intr(device_t, device_t, struct resource *, int,
driver_filter_t *, void (*)(void *), void *, void **);
int scc_bus_teardown_intr(device_t, device_t, struct resource *, void *);
#endif /* _DEV_SCC_BFE_H_ */
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