lpc_com.c revision 1.2
1 /* $NetBSD: lpc_com.c,v 1.2 2008/11/10 04:07:30 cliff 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 1.2 2008/11/10 04:07:30 cliff 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 <machine/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 70 typedef 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 80 static int lpc_com_match(device_t, cfdata_t , void *); 81 static void lpc_com_attach(device_t, device_t, void *); 82 static int lpc_com_intr(void *); 83 static void lpc_com_time(void *); 84 85 CFATTACH_DECL_NEW(lpc_com, sizeof(struct lpc_com_softc), 86 lpc_com_match, lpc_com_attach, NULL, NULL); 87 88 static int 89 lpc_com_match(device_t parent, cfdata_t cf, void *aux) 90 { 91 struct gemini_lpc_attach_args *lpc = aux; 92 gemini_lpc_bus_ops_t *ops; 93 lpctag_t lpctag; 94 bus_space_tag_t iot; 95 bus_space_handle_t ioh; 96 bus_addr_t iobase; 97 int rv; 98 99 if (lpc->lpc_addr == LPCCF_LDN_DEFAULT 100 || lpc->lpc_addr == LPCCF_ADDR_DEFAULT) 101 panic("lpc_com must have ldn and addr" 102 " in config."); 103 104 if ((lpc->lpc_intr != LPCCF_INTR_DEFAULT) && (lpc->lpc_intr > 0xff)) 105 panic("lpc_com: bad intr %d", lpc->lpc_intr); 106 107 if (lpc->lpc_size == LPCCF_SIZE_DEFAULT) 108 lpc->lpc_size = IT8712F_UART_SIZE; 109 110 iobase = lpc->lpc_base + lpc->lpc_addr; 111 if (com_is_console(lpc->lpc_iot, iobase, NULL)) 112 return 1; 113 114 lpctag = lpc->lpc_tag; 115 ops = lpc->lpc_bus_ops; 116 (*ops->lpc_pnp_enter)(lpctag); 117 118 /* Activate */ 119 (*ops->lpc_pnp_write)(lpctag, lpc->lpc_ldn, 0x30, 0x01); 120 121 /* Set address */ 122 (*ops->lpc_pnp_write)(lpctag, lpc->lpc_ldn, 0x60, 123 (lpc->lpc_addr % 0xff00) >> 8); 124 (*ops->lpc_pnp_write)(lpctag, lpc->lpc_ldn, 0x61, 125 (lpc->lpc_addr % 0x00ff) >> 0); 126 127 /* Set Interrupt Level */ 128 (*ops->lpc_pnp_write)(lpctag, lpc->lpc_ldn, 0x70, lpc->lpc_intr); 129 130 /* Set Special Configuration Regs */ 131 (*ops->lpc_pnp_write)(lpctag, lpc->lpc_ldn, 0xf0, 0x00); 132 #if 0 133 (*ops->lpc_pnp_write)(lpctag, lpc->lpc_ldn, 0xf1, 0x50); 134 #else 135 (*ops->lpc_pnp_write)(lpctag, lpc->lpc_ldn, 0xf1, 0x58); /* LO */ 136 #endif 137 (*ops->lpc_pnp_write)(lpctag, lpc->lpc_ldn, 0xf2, 0x00); 138 (*ops->lpc_pnp_write)(lpctag, lpc->lpc_ldn, 0xf3, 0x7f); 139 140 (*ops->lpc_pnp_exit)(lpctag); 141 142 iot = lpc->lpc_iot; 143 if (bus_space_map(iot, iobase, lpc->lpc_size, 0, &ioh)) 144 return 0; 145 146 rv = comprobe1(iot, ioh); 147 148 bus_space_unmap(iot, ioh, lpc->lpc_size); 149 150 return rv; 151 } 152 153 static void 154 lpc_com_attach(device_t parent, device_t self, void *aux) 155 { 156 struct lpc_com_softc *sc = device_private(self); 157 struct gemini_lpc_attach_args *lpc = aux; 158 gemini_lpc_bus_ops_t *ops = lpc->lpc_bus_ops; 159 bus_space_tag_t iot; 160 bus_space_handle_t ioh; 161 bus_addr_t iobase; 162 163 sc->sc_com.sc_dev = self; 164 iot = lpc->lpc_iot; 165 iobase = lpc->lpc_base + lpc->lpc_addr; 166 sc->sc_com.sc_frequency = IT8712F_COM_FREQ; 167 sc->sc_com.sc_type = COM_TYPE_NORMAL; 168 169 if (com_is_console(iot, iobase, &ioh) == 0 && 170 bus_space_map(iot, iobase, lpc->lpc_size, 0, &ioh)) { 171 panic(": can't map registers\n"); 172 return; 173 } 174 175 COM_INIT_REGS(sc->sc_com.sc_regs, iot, ioh, iobase); 176 177 com_attach_subr(&sc->sc_com); 178 aprint_naive("\n"); 179 180 if (lpc->lpc_intr == LPCCF_INTR_DEFAULT) { 181 /* callout based polliung */ 182 callout_init(&sc->sc_callout, 0); 183 callout_setfunc(&sc->sc_callout, lpc_com_time, sc); 184 callout_schedule(&sc->sc_callout, hz/16); 185 aprint_normal("%s: callout polling mode\n", device_xname(self)); 186 } else { 187 /* interrupting */ 188 #if 0 189 (*ops->lpc_intr_establish)(lpc->lpc_intrtag, lpc->lpc_intr, 190 IPL_SERIAL, IST_LEVEL_HIGH, comintr, &sc->sc_com); 191 #else 192 (*ops->lpc_intr_establish)(lpc->lpc_intrtag, lpc->lpc_intr, 193 IPL_SERIAL, IST_LEVEL_LOW, lpc_com_intr, &sc->sc_com); 194 #endif 195 } 196 } 197 198 int 199 lpc_com_intr(void *arg) 200 { 201 printf("."); 202 return comintr(arg); 203 } 204 205 void 206 lpc_com_time(void *arg) 207 { 208 lpc_com_softc_t *sc = arg; 209 int s; 210 211 s = splserial(); 212 (void)comintr(&sc->sc_com); 213 callout_schedule(&sc->sc_callout, hz/16); 214 splx(s); 215 } 216
Indexes created Tue Sep 30 11:09:46 GMT 2025