459 lines
14 KiB
C
459 lines
14 KiB
C
/* $NetBSD: ralink_com.c,v 1.5 2016/10/05 15:54:58 ryo Exp $ */
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/*-
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* Copyright (c) 2011 CradlePoint Technology, Inc.
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* All rights reserved.
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*
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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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*
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* THIS SOFTWARE IS PROVIDED BY CRADLEPOINT TECHNOLOGY, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*-
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* Copyright (c) 2006 Urbana-Champaign Independent Media Center.
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* Copyright (c) 2006 Garrett D'Amore.
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* All rights reserved.
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*
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* Portions of this code were written by Garrett D'Amore for the
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* Champaign-Urbana Community Wireless Network Project.
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions 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
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgements:
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* This product includes software developed by the Urbana-Champaign
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* Independent Media Center.
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* This product includes software developed by Garrett D'Amore.
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* 4. Urbana-Champaign Independent Media Center's name and Garrett
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* D'Amore's name 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 URBANA-CHAMPAIGN INDEPENDENT
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* MEDIA CENTER AND GARRETT D'AMORE ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE URBANA-CHAMPAIGN INDEPENDENT
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* MEDIA CENTER OR GARRETT D'AMORE 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;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*-
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* Copyright (c) 1998 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Charles M. Hannum.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*-
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* Copyright (c) 1991 The Regents of the University of California.
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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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* 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 the University nor the names of its 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 THE REGENTS 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 THE REGENTS 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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* @(#)com.c 7.5 (Berkeley) 5/16/91
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*/
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/* ralink_com.c -- Ralink 3052 uart console driver */
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: ralink_com.c,v 1.5 2016/10/05 15:54:58 ryo Exp $");
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#include "locators.h"
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#include <sys/param.h>
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#include <sys/bus.h>
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#include <sys/device.h>
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#include <sys/kernel.h>
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#include <sys/systm.h>
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#include <sys/tty.h>
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#include <sys/termios.h>
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#include <sys/ttydefaults.h>
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#include <dev/cons.h>
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#include <dev/ic/comreg.h>
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#include <dev/ic/comvar.h>
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#include <mips/cpuregs.h>
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#include <mips/ralink/ralink_reg.h>
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#include <mips/ralink/ralink_var.h>
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#include "opt_com.h"
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struct ralink_com_softc {
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struct com_softc sc_com;
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void *sc_ih;
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bus_addr_t sc_addr;
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int sc_irq;
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};
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static int ralink_com_match(device_t, cfdata_t , void *);
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static void ralink_com_attach(device_t, device_t, void *);
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static void ralink_com_initmap(struct com_regs *regsp);
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CFATTACH_DECL_NEW(ralink_com, sizeof(struct ralink_com_softc),
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ralink_com_match, ralink_com_attach, NULL, NULL);
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#define CONMODE \
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((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */
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#ifndef COM_REGMAP
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#error COM_REGMAP not defined!
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#endif
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#ifndef RALINK_CONADDR
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#define RALINK_CONADDR RA_UART_LITE_BASE /* default console is UART_LITE */
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#endif
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/* address/irq/rst/gpiomode mappings */
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static struct {
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bus_addr_t addr;
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int irq;
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uint32_t rst;
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uint32_t gpiomode;
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} ralink_uart_maps[] = {
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#ifdef MT7628
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{ RA_UART_LITE_BASE, RA_IRQ_UARTL, RST_UART0_7628, GPIO1MODE_UART0 },
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{ RA_UART1_BASE, RA_IRQ_UART1, RST_UART1_7628, GPIO1MODE_UART1 },
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{ RA_UART2_BASE, RA_IRQ_UART2, RST_UART2_7628, GPIO1MODE_UART2 },
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#else
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{ RA_UART_BASE, RA_IRQ_UARTF, RST_UART, GPIOMODE_UARTF0 },
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{ RA_UART_LITE_BASE, RA_IRQ_UARTL, RST_UARTL, GPIOMODE_UARTL }
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#endif
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};
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static inline int
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ra_uart2irq(bus_addr_t addr)
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{
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int i;
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for (i = 0; __arraycount(ralink_uart_maps); i++)
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if (ralink_uart_maps[i].addr == addr)
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return ralink_uart_maps[i].irq;
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return -1;
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}
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static inline uint32_t
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ra_uart2rst(bus_addr_t addr)
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{
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int i;
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for (i = 0; __arraycount(ralink_uart_maps); i++)
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if (ralink_uart_maps[i].addr == addr)
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return ralink_uart_maps[i].rst;
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return 0;
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}
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static inline uint32_t
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ra_uart2gpiomode(bus_addr_t addr)
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{
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int i;
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for (i = 0; __arraycount(ralink_uart_maps); i++)
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if (ralink_uart_maps[i].addr == addr)
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return ralink_uart_maps[i].gpiomode;
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return 0;
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}
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static inline uint32_t
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sysctl_read(const u_int offset)
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{
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return *RA_IOREG_VADDR(RA_SYSCTL_BASE, offset);
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}
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static inline void
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sysctl_write(const u_int offset, uint32_t val)
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{
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*RA_IOREG_VADDR(RA_SYSCTL_BASE, offset) = val;
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}
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static inline uint32_t
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uart_read(const u_int offset)
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{
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return *RA_IOREG_VADDR(RALINK_CONADDR, offset);
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}
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static inline void
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uart_write(const u_int offset, const uint32_t val)
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{
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*RA_IOREG_VADDR(RALINK_CONADDR, offset) = val;
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}
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#ifdef RALINK_CONSOLE_EARLY
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static int
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ralink_cngetc(dev_t dv)
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{
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if ((uart_read(RA_UART_LSR) & LSR_RXRDY) == 0)
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return -1;
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return uart_read(RA_UART_RBR) & 0xff;
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}
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static void
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ralink_cnputc(dev_t dv, int c)
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{
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int timo = 150000;
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while ((uart_read(RA_UART_LSR) & LSR_TXRDY) == 0 && --timo > 0)
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;
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uart_write(RA_UART_TBR, c);
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__asm __volatile("sync");
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timo = 150000;
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while ((uart_read(RA_UART_LSR) & LSR_TSRE) == 0 && --timo > 0)
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;
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}
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static struct consdev ralink_earlycons = {
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.cn_putc = ralink_cnputc,
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.cn_getc = ralink_cngetc,
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.cn_pollc = nullcnpollc,
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};
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void
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ralink_console_early(void)
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{
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cn_tab = &ralink_earlycons;
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}
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#endif /* RALINK_CONSOLE_EARLY */
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int
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ralink_com_match(device_t parent, cfdata_t cf, void *aux)
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{
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const struct mainbus_attach_args *ma;
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bus_addr_t addr;
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ma = aux;
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addr = ma->ma_addr;
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if (addr == MAINBUSCF_ADDR_DEFAULT)
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addr = RA_UART_LITE_BASE;
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if (ra_uart2irq(addr) < 0)
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return 0;
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if (cn_tab == NULL || cn_tab->cn_pri < CN_NORMAL) {
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printf("NULL console set, don't install ourselves "
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"(of course this shouldn't print)");
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return 0;
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}
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/*
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* If we got this far, assume we want to install it as the console.
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* No need to probe. Future possibilities include checking to see if it
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* is console or KGDB but now it is our only console method if we aren't
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* forcing a null console
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*/
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return 1;
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}
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void
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ralink_com_attach(device_t parent, device_t self, void *aux)
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{
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const struct mainbus_attach_args *ma = aux;
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struct ralink_com_softc * const rtsc = device_private(self);
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struct com_softc * const sc = &rtsc->sc_com;
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bus_space_handle_t ioh;
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int error;
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/* opt addr and irq */
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rtsc->sc_addr = ma->ma_addr;
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if (rtsc->sc_addr == MAINBUSCF_ADDR_DEFAULT)
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rtsc->sc_addr = RA_UART_LITE_BASE;
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rtsc->sc_irq = ra_uart2irq(rtsc->sc_addr);
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if ((error = bus_space_map(ma->ma_memt, rtsc->sc_addr,
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RA_UART_SIZE, 0, &ioh)) != 0) {
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aprint_error(": can't map registers, error=%d\n", error);
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return;
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}
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sc->sc_dev = self;
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sc->sc_frequency = RA_UART_FREQ;
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sc->sc_regs.cr_nports = 32;
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#if defined(MT7628)
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sc->sc_type = COM_TYPE_NORMAL;
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#else
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sc->sc_type = COM_TYPE_AU1x00;
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#endif
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sc->enabled = 1;
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/* reset hardware if not a console */
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if (rtsc->sc_addr != RALINK_CONADDR) {
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uint32_t r;
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/* reset */
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r = sysctl_read(RA_SYSCTL_RST);
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r |= ra_uart2rst(rtsc->sc_addr);
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sysctl_write(RA_SYSCTL_RST, r);
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r ^= ra_uart2rst(rtsc->sc_addr);
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sysctl_write(RA_SYSCTL_RST, r);
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/* make sure we are in UART mode */
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r = sysctl_read(RA_SYSCTL_GPIOMODE);
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r &= ra_uart2gpiomode(rtsc->sc_addr);
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r |= __SHIFTIN(0, ra_uart2gpiomode(rtsc->sc_addr));
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sysctl_write(RA_SYSCTL_GPIOMODE, r);
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}
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COM_INIT_REGS(sc->sc_regs, ma->ma_memt, ioh, rtsc->sc_addr);
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ralink_com_initmap(&sc->sc_regs);
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rtsc->sc_ih = ra_intr_establish(rtsc->sc_irq, comintr, sc, 1);
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com_attach_subr(sc);
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}
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static void
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ralink_com_initmap(struct com_regs *regsp)
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{
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regsp->cr_map[COM_REG_RXDATA] = RA_UART_RBR;
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regsp->cr_map[COM_REG_TXDATA] = RA_UART_TBR;
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regsp->cr_map[COM_REG_DLBL] = RA_UART_DLL;
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#if defined(MT7628)
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regsp->cr_map[COM_REG_DLBH] = RA_UART_DLM;
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#endif
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regsp->cr_map[COM_REG_IER] = RA_UART_IER;
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regsp->cr_map[COM_REG_IIR] = RA_UART_IIR;
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regsp->cr_map[COM_REG_FIFO] = RA_UART_FCR;
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regsp->cr_map[COM_REG_LCR] = RA_UART_LCR;
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regsp->cr_map[COM_REG_MCR] = RA_UART_MCR;
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regsp->cr_map[COM_REG_LSR] = RA_UART_LSR;
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regsp->cr_map[COM_REG_MSR] = RA_UART_MSR;
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}
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void
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ralink_com_early(int silent)
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{
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struct com_regs regs;
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uint32_t r;
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int error;
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/* reset */
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r = sysctl_read(RA_SYSCTL_RST);
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r |= ra_uart2rst(RALINK_CONADDR);
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sysctl_write(RA_SYSCTL_RST, r);
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r ^= ra_uart2rst(RALINK_CONADDR);
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sysctl_write(RA_SYSCTL_RST, r);
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if (silent) {
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/*
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* put us in PIO mode,
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* effectively tri-stating the UARTL block
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*/
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r = sysctl_read(RA_SYSCTL_GPIOMODE);
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r &= ra_uart2gpiomode(RALINK_CONADDR);
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r |= __SHIFTIN(1, ra_uart2gpiomode(RALINK_CONADDR));
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sysctl_write(RA_SYSCTL_GPIOMODE, r);
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} else {
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/* make sure we are in UART mode */
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r = sysctl_read(RA_SYSCTL_GPIOMODE);
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r &= ra_uart2gpiomode(RALINK_CONADDR);
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r |= __SHIFTIN(0, ra_uart2gpiomode(RALINK_CONADDR));
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sysctl_write(RA_SYSCTL_GPIOMODE, r);
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}
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uart_write(RA_UART_IER, 0); /* disable interrupts */
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uart_write(RA_UART_FCR, 0); /* disable fifos */
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/* set baud rate */
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uart_write(RA_UART_LCR,
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UART_LCR_WLS0 | UART_LCR_WLS1 | UART_LCR_DLAB);
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uart_write(RA_UART_DLL,
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(RA_UART_FREQ / RA_SERIAL_CLKDIV / RA_BAUDRATE) & 0xffff);
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#if defined(MT7628)
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uart_write(RA_UART_DLM,
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((RA_UART_FREQ / RA_SERIAL_CLKDIV / RA_BAUDRATE) & 0xffff) >> 8);
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#endif
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uart_write(RA_UART_LCR, UART_LCR_WLS0 | UART_LCR_WLS1);
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regs.cr_iot = &ra_bus_memt;
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regs.cr_iobase = RALINK_CONADDR;
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regs.cr_nports = 32;
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ralink_com_initmap(®s);
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if ((error = bus_space_map(regs.cr_iot, regs.cr_iobase, regs.cr_nports,
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0, ®s.cr_ioh)) != 0) {
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return;
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}
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#if defined(MT7628)
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comcnattach1(®s, RA_BAUDRATE, RA_UART_FREQ,
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COM_TYPE_NORMAL, CONMODE);
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#else
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/* Ralink UART has a 16-bit rate latch (like the AU1x00) */
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comcnattach1(®s, RA_BAUDRATE, RA_UART_FREQ,
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COM_TYPE_AU1x00, CONMODE);
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#endif
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}
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