1/* $NetBSD: lpc_com.c,v 1.5 2018/12/08 17:46:09 thorpej Exp $ */ 2 3/* adapted from: 4 * NetBSD: gemini_com.c,v 1.1 2008/10/24 04:23:18 matt Exp 5 */ 6 7/* 8 * Based on arch/arm/xscale/pxa2x0_com.c 9 * 10 * Copyright 2003 Wasabi Systems, Inc. 11 * All rights reserved. 12 * 13 * Written by Steve C. Woodford for Wasabi Systems, Inc. 14 * 15 * Redistribution and use in source and binary forms, with or without 16 * modification, are permitted provided that the following conditions 17 * are met: 18 * 1. Redistributions of source code must retain the above copyright 19 * notice, this list of conditions and the following disclaimer. 20 * 2. Redistributions in binary form must reproduce the above copyright 21 * notice, this list of conditions and the following disclaimer in the 22 * documentation and/or other materials provided with the distribution. 23 * 3. All advertising materials mentioning features or use of this software 24 * must display the following acknowledgement: 25 * This product includes software developed for the NetBSD Project by 26 * Wasabi Systems, Inc. 27 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 28 * or promote products derived from this software without specific prior 29 * written permission. 30 * 31 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 32 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 33 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 34 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 35 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 36 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 37 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 38 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 39 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 40 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 41 * POSSIBILITY OF SUCH DAMAGE. 42 */ 43 44#include <sys/cdefs.h> 45__KERNEL_RCSID(0, "$NetBSD: lpc_com.c,v 1.5 2018/12/08 17:46:09 thorpej Exp $"); 46 47#include "opt_com.h" 48#include "locators.h" 49 50#include <sys/param.h> 51#include <sys/systm.h> 52#include <sys/device.h> 53#include <sys/termios.h> 54#include <sys/callout.h> 55#include <sys/kernel.h> 56 57#include <machine/intr.h> 58#include <sys/bus.h> 59 60#include <dev/ic/comreg.h> 61#include <dev/ic/comvar.h> 62 63#include <arm/gemini/gemini_obiovar.h> 64#include <arm/gemini/gemini_lpchcvar.h> 65#include <arm/gemini/gemini_lpcvar.h> 66#include <arm/gemini/gemini_reg.h> 67 68#include <arm/gemini/lpc_com.h> 69 70typedef struct lpc_com_softc { 71 struct com_softc sc_com; 72 bus_addr_t sc_addr; 73 bus_size_t sc_size; 74 int sc_intr; 75 bus_space_tag_t sc_iot; 76 bus_space_handle_t sc_ioh; 77 struct callout sc_callout; 78} lpc_com_softc_t; 79 80static int lpc_com_match(device_t, cfdata_t , void *); 81static void lpc_com_attach(device_t, device_t, void *); 82static int lpc_com_intr(void *); 83static void lpc_com_time(void *); 84 85CFATTACH_DECL_NEW(lpc_com, sizeof(struct lpc_com_softc), 86 lpc_com_match, lpc_com_attach, NULL, NULL); 87 88static int 89lpc_com_match(device_t parent, cfdata_t cf, void *aux) 90{ 91 struct gemini_lpc_attach_args *lpc = aux; 92 lpctag_t lpctag; 93 bus_space_tag_t iot; 94 bus_space_handle_t ioh; 95 bus_addr_t iobase; 96 int rv; 97 98 if (lpc->lpc_addr == LPCCF_LDN_DEFAULT 99 || lpc->lpc_addr == LPCCF_ADDR_DEFAULT) 100 panic("lpc_com must have ldn and addr" 101 " in config."); 102 103 if ((lpc->lpc_intr != LPCCF_INTR_DEFAULT) && (lpc->lpc_intr > 0xff)) 104 panic("lpc_com: bad intr %d", lpc->lpc_intr); 105 106 if (lpc->lpc_size == LPCCF_SIZE_DEFAULT) 107 lpc->lpc_size = IT8712F_UART_SIZE; 108 109 iobase = lpc->lpc_base + lpc->lpc_addr; 110 if (com_is_console(lpc->lpc_iot, iobase, NULL)) 111 return 1; 112 113 lpctag = lpc->lpc_tag; 114 115 lpc_pnp_enter(lpctag); 116 117 /* Activate */ 118 lpc_pnp_write(lpctag, lpc->lpc_ldn, 0x30, 0x01); 119 120 /* Set address */ 121 lpc_pnp_write(lpctag, lpc->lpc_ldn, 0x60, 122 (lpc->lpc_addr % 0xff00) >> 8); 123 lpc_pnp_write(lpctag, lpc->lpc_ldn, 0x61, 124 (lpc->lpc_addr % 0x00ff) >> 0); 125 126 /* Set Interrupt Level */ 127 lpc_pnp_write(lpctag, lpc->lpc_ldn, 0x70, lpc->lpc_intr); 128 129 /* Set Special Configuration Regs */ 130 lpc_pnp_write(lpctag, lpc->lpc_ldn, 0xf0, 0x00); 131#if 0 132 lpc_pnp_write(lpctag, lpc->lpc_ldn, 0xf1, 0x50); 133#else 134 lpc_pnp_write(lpctag, lpc->lpc_ldn, 0xf1, 0x58); /* LO */ 135#endif 136 lpc_pnp_write(lpctag, lpc->lpc_ldn, 0xf2, 0x00); 137 lpc_pnp_write(lpctag, lpc->lpc_ldn, 0xf3, 0x7f); 138 139 lpc_pnp_exit(lpctag); 140 141 iot = lpc->lpc_iot; 142 if (bus_space_map(iot, iobase, lpc->lpc_size, 0, &ioh)) 143 return 0; 144 145 rv = comprobe1(iot, ioh); 146 147 bus_space_unmap(iot, ioh, lpc->lpc_size); 148 149 return rv; 150} 151 152static void 153lpc_com_attach(device_t parent, device_t self, void *aux) 154{ 155 struct lpc_com_softc *sc = device_private(self); 156 struct gemini_lpc_attach_args *lpc = aux; 157 bus_space_tag_t iot; 158 bus_space_handle_t ioh; 159 bus_addr_t iobase; 160 161 sc->sc_com.sc_dev = self; 162 iot = lpc->lpc_iot; 163 iobase = lpc->lpc_base + lpc->lpc_addr; 164 sc->sc_com.sc_frequency = IT8712F_COM_FREQ; 165 sc->sc_com.sc_type = COM_TYPE_NORMAL; 166 167 if (com_is_console(iot, iobase, &ioh) == 0 && 168 bus_space_map(iot, iobase, lpc->lpc_size, 0, &ioh)) { 169 panic(": can't map registers\n"); 170 return; 171 } 172 173 com_init_regs(&sc->sc_com.sc_regs, iot, ioh, iobase); 174 175 com_attach_subr(&sc->sc_com); 176 aprint_naive("\n"); 177 178 if (lpc->lpc_intr == LPCCF_INTR_DEFAULT) { 179 /* callout based polliung */ 180 callout_init(&sc->sc_callout, 0); 181 callout_setfunc(&sc->sc_callout, lpc_com_time, sc); 182 callout_schedule(&sc->sc_callout, hz/16); 183 aprint_normal("%s: callout polling mode\n", device_xname(self)); 184 } else { 185 /* interrupting */ 186#if 0 187 lpc_intr_establish(lpc->lpc_tag, lpc->lpc_intr, 188 IPL_SERIAL, IST_LEVEL_HIGH, comintr, &sc->sc_com); 189#else 190 lpc_intr_establish(lpc->lpc_tag, lpc->lpc_intr, 191 IPL_SERIAL, IST_LEVEL_LOW, lpc_com_intr, &sc->sc_com); 192#endif 193 } 194} 195 196int 197lpc_com_intr(void *arg) 198{ 199 printf("."); 200 return comintr(arg); 201} 202 203void 204lpc_com_time(void *arg) 205{ 206 lpc_com_softc_t *sc = arg; 207 int s; 208 209 s = splserial(); 210 (void)comintr(&sc->sc_com); 211 callout_schedule(&sc->sc_callout, hz/16); 212 splx(s); 213} 214