6239f9e5f1
total of 6 interrupt resources for scc(4) on macio(4). This is 3 per channel, of which the 1st of each channel is the interrupt associated with the SCC. The other 2 are for DMA operation. Change scc_bfe_attach() to accept an argument that's the number of interrupts per channel (ipc) and change each bus front-end (bfe) to pass that argument through a wrapper for the device_attach method. For now, we only allocate the 1st interrupt of each channel to perserve behaviour.
155 lines
4.4 KiB
C
155 lines
4.4 KiB
C
/*-
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* Copyright (c) 2004-2006 Marcel Moolenaar
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* All rights reserved.
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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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*
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _DEV_SCC_BFE_H_
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#define _DEV_SCC_BFE_H_
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#include <sys/serial.h>
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/*
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* Bus access structure. This structure holds the minimum information needed
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* to access the SCC. The rclk field, although not important to actually
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* access the SCC, is important for baudrate programming, delay loops and
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* other timing related computations.
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*/
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struct scc_bas {
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bus_space_tag_t bst;
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bus_space_handle_t bsh;
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u_int range;
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u_int rclk;
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u_int regshft;
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};
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#define scc_regofs(bas, reg) ((reg) << (bas)->regshft)
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#define scc_getreg(bas, reg) \
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bus_space_read_1((bas)->bst, (bas)->bsh, scc_regofs(bas, reg))
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#define scc_setreg(bas, reg, value) \
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bus_space_write_1((bas)->bst, (bas)->bsh, scc_regofs(bas, reg), value)
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#define scc_barrier(bas) \
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bus_space_barrier((bas)->bst, (bas)->bsh, 0, (bas)->range, \
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BUS_SPACE_BARRIER_READ|BUS_SPACE_BARRIER_WRITE)
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/*
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* SCC mode (child) and channel control structures.
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*/
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#define SCC_NMODES 3
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#define SCC_ISRCCNT 5
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struct scc_chan;
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struct scc_mode {
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struct scc_chan *m_chan;
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device_t m_dev;
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u_int m_mode;
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int m_attached:1;
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int m_fastintr:1;
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int m_hasintr:1;
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int m_probed:1;
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int m_sysdev:1;
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driver_filter_t *ih;
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serdev_intr_t *ih_src[SCC_ISRCCNT];
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void *ih_arg;
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};
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struct scc_chan {
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struct resource ch_rres;
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struct resource_list ch_rlist;
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struct resource *ch_ires; /* Interrupt resource. */
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void *ch_icookie;
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int ch_irid;
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struct scc_mode ch_mode[SCC_NMODES];
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u_int ch_nr;
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int ch_enabled:1;
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int ch_sysdev:1;
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uint32_t ch_ipend;
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uint32_t ch_hwsig;
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};
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/*
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* SCC class & instance (=softc)
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*/
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struct scc_class {
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KOBJ_CLASS_FIELDS;
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u_int cl_channels; /* Number of independent channels. */
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u_int cl_class; /* SCC bus class ID. */
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u_int cl_modes; /* Supported modes (bitset). */
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int cl_range;
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};
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extern struct scc_class scc_quicc_class;
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extern struct scc_class scc_sab82532_class;
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extern struct scc_class scc_z8530_class;
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struct scc_softc {
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KOBJ_FIELDS;
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struct scc_class *sc_class;
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struct scc_bas sc_bas;
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device_t sc_dev;
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struct mtx sc_hwmtx; /* Spinlock protecting hardware. */
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struct resource *sc_rres; /* Register resource. */
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int sc_rrid;
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int sc_rtype; /* SYS_RES_{IOPORT|MEMORY}. */
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struct scc_chan *sc_chan;
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int sc_fastintr:1;
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int sc_leaving:1;
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int sc_polled:1;
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uint32_t sc_hwsig; /* Signal state. Used by HW driver. */
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};
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extern devclass_t scc_devclass;
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extern char scc_driver_name[];
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int scc_bfe_attach(device_t dev, u_int ipc);
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int scc_bfe_detach(device_t dev);
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int scc_bfe_probe(device_t dev, u_int regshft, u_int rclk, u_int rid);
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struct resource *scc_bus_alloc_resource(device_t, device_t, int, int *,
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u_long, u_long, u_long, u_int);
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int scc_bus_get_resource(device_t, device_t, int, int, u_long *, u_long *);
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int scc_bus_read_ivar(device_t, device_t, int, uintptr_t *);
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int scc_bus_release_resource(device_t, device_t, int, int, struct resource *);
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int scc_bus_setup_intr(device_t, device_t, struct resource *, int,
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driver_filter_t *, void (*)(void *), void *, void **);
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int scc_bus_teardown_intr(device_t, device_t, struct resource *, void *);
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#endif /* _DEV_SCC_BFE_H_ */
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