5a2bf51a92
affected TI OMAP (LCR register would get clobbered due to using the wrong offset for the MDR1 register) reported by Lwazi Dube (who also found the root cause).
223 lines
6.4 KiB
C
223 lines
6.4 KiB
C
/* $NetBSD: comvar.h,v 1.92 2019/01/11 23:10:41 thorpej Exp $ */
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/*
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* Copyright (c) 1996 Christopher G. Demetriou. 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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* 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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Christopher G. Demetriou
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* for the NetBSD Project.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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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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#include "opt_multiprocessor.h"
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#include "opt_lockdebug.h"
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#include "opt_com.h"
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#include "opt_kgdb.h"
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#ifdef RND_COM
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#include <sys/rndsource.h>
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#endif
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#include <sys/callout.h>
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#include <sys/timepps.h>
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#include <sys/mutex.h>
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#include <sys/device.h>
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#include <dev/ic/comreg.h> /* for COM_NPORTS */
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struct com_regs;
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int comcnattach(bus_space_tag_t, bus_addr_t, int, int, int, tcflag_t);
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int comcnattach1(struct com_regs *, int, int, int, tcflag_t);
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#ifdef KGDB
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int com_kgdb_attach(bus_space_tag_t, bus_addr_t, int, int, int, tcflag_t);
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int com_kgdb_attach1(struct com_regs *, int, int, int, tcflag_t);
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#endif
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int com_is_console(bus_space_tag_t, bus_addr_t, bus_space_handle_t *);
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/* Hardware flag masks */
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#define COM_HW_NOIEN 0x01
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#define COM_HW_FIFO 0x02
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/* 0x04 free for use */
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#define COM_HW_FLOW 0x08
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#define COM_HW_DEV_OK 0x20
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#define COM_HW_CONSOLE 0x40
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#define COM_HW_KGDB 0x80
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#define COM_HW_TXFIFO_DISABLE 0x100
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#define COM_HW_NO_TXPRELOAD 0x200
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#define COM_HW_AFE 0x400
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#define COM_HW_POLL 0x800
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/* Buffer size for character buffer */
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#ifndef COM_RING_SIZE
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#define COM_RING_SIZE 2048
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#endif
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#define COM_REG_RXDATA 0
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#define COM_REG_TXDATA 1
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#define COM_REG_DLBL 2
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#define COM_REG_DLBH 3
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#define COM_REG_IER 4
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#define COM_REG_IIR 5
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#define COM_REG_FIFO 6
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#define COM_REG_TCR 7
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#define COM_REG_EFR 8
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#define COM_REG_TLR 9
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#define COM_REG_LCR 10
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#define COM_REG_MCR 11
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#define COM_REG_LSR 12
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#define COM_REG_MSR 13
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#define COM_REG_MDR1 14 /* TI OMAP */
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#define COM_REG_USR 15 /* 16750/DW APB */
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#define COM_REG_TFL 16 /* DW APB */
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#define COM_REG_RFL 17 /* DW APB */
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#define COM_REG_HALT 18 /* DW APB */
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#define COM_REGMAP_NENTRIES 19
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struct com_regs {
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bus_space_tag_t cr_iot;
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bus_space_handle_t cr_ioh;
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bus_addr_t cr_iobase;
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bus_size_t cr_nports;
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bus_size_t cr_map[COM_REGMAP_NENTRIES];
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};
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void com_init_regs(struct com_regs *, bus_space_tag_t, bus_space_handle_t,
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bus_addr_t);
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void com_init_regs_stride(struct com_regs *, bus_space_tag_t,
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bus_space_handle_t, bus_addr_t, u_int);
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struct comcons_info {
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struct com_regs regs;
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int rate;
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int frequency;
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int type;
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tcflag_t cflag;
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};
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struct com_softc {
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device_t sc_dev;
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void *sc_si;
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struct tty *sc_tty;
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callout_t sc_diag_callout;
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callout_t sc_poll_callout;
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int sc_frequency;
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struct com_regs sc_regs;
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bus_space_handle_t sc_hayespioh;
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u_int sc_overflows,
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sc_floods,
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sc_errors;
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int sc_hwflags,
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sc_swflags;
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u_int sc_fifolen;
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u_int sc_r_hiwat,
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sc_r_lowat;
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u_char *volatile sc_rbget,
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*volatile sc_rbput;
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volatile u_int sc_rbavail;
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u_char *sc_rbuf,
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*sc_ebuf;
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u_char *sc_tba;
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u_int sc_tbc,
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sc_heldtbc;
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volatile u_char sc_rx_flags,
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#define RX_TTY_BLOCKED 0x01
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#define RX_TTY_OVERFLOWED 0x02
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#define RX_IBUF_BLOCKED 0x04
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#define RX_IBUF_OVERFLOWED 0x08
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#define RX_ANY_BLOCK 0x0f
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sc_tx_busy,
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sc_tx_done,
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sc_tx_stopped,
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sc_st_check,
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sc_rx_ready;
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volatile u_char sc_heldchange;
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volatile u_char sc_msr, sc_msr_delta, sc_msr_mask, sc_mcr,
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sc_mcr_active, sc_lcr, sc_ier, sc_fifo, sc_dlbl, sc_dlbh, sc_efr;
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u_char sc_mcr_dtr, sc_mcr_rts, sc_msr_cts, sc_msr_dcd;
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u_char sc_prescaler; /* for COM_TYPE_HAYESP */
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/*
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* There are a great many almost-ns16550-compatible UARTs out
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* there, which have minor differences. The type field here
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* lets us distinguish between them.
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*/
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int sc_type;
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#define COM_TYPE_NORMAL 0 /* normal 16x50 */
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#define COM_TYPE_HAYESP 1 /* Hayes ESP modem */
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#define COM_TYPE_PXA2x0 2 /* Intel PXA2x0 processor built-in */
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#define COM_TYPE_AU1x00 3 /* AMD/Alchemy Au1x000 proc. built-in */
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#define COM_TYPE_OMAP 4 /* TI OMAP processor built-in */
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#define COM_TYPE_16550_NOERS 5 /* like a 16550, no ERS */
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#define COM_TYPE_INGENIC 6 /* JZ4780 built-in */
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#define COM_TYPE_TEGRA 7 /* NVIDIA Tegra built-in */
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#define COM_TYPE_BCMAUXUART 8 /* BCM2835 AUX UART */
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#define COM_TYPE_16650 9
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#define COM_TYPE_16750 10
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#define COM_TYPE_DW_APB 11 /* DesignWare APB UART */
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/* power management hooks */
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int (*enable)(struct com_softc *);
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void (*disable)(struct com_softc *);
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int enabled;
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/* XXXX: vendor workaround functions */
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int (*sc_vendor_workaround)(struct com_softc *);
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struct pps_state sc_pps_state; /* pps state */
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#ifdef RND_COM
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krndsource_t rnd_source;
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#endif
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kmutex_t sc_lock;
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};
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int comprobe1(bus_space_tag_t, bus_space_handle_t);
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int comintr(void *);
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void com_attach_subr(struct com_softc *);
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int com_probe_subr(struct com_regs *);
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int com_detach(device_t, int);
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bool com_resume(device_t, const pmf_qual_t *);
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bool com_cleanup(device_t, int);
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bool com_suspend(device_t, const pmf_qual_t *);
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#ifndef IPL_SERIAL
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#define IPL_SERIAL IPL_TTY
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#define splserial() spltty()
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#endif
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