zs_pcc.c revision 1.8.4.1
1 /* $NetBSD: zs_pcc.c,v 1.8.4.1 2000/10/17 19:52:04 scw Exp $ */ 2 3 /*- 4 * Copyright (c) 1996 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Gordon W. Ross and Jason R. Thorpe. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Zilog Z8530 Dual UART driver (machine-dependent part) 41 * 42 * Runs two serial lines per chip using slave drivers. 43 * Plain tty/async lines use the zs_async slave. 44 * 45 * Modified for NetBSD/mvme68k by Jason R. Thorpe <thorpej (at) NetBSD.ORG> 46 */ 47 48 #include <sys/param.h> 49 #include <sys/systm.h> 50 #include <sys/proc.h> 51 #include <sys/device.h> 52 #include <sys/conf.h> 53 #include <sys/file.h> 54 #include <sys/ioctl.h> 55 #include <sys/tty.h> 56 #include <sys/time.h> 57 #include <sys/kernel.h> 58 #include <sys/syslog.h> 59 60 #include <dev/cons.h> 61 #include <dev/ic/z8530reg.h> 62 #include <machine/z8530var.h> 63 64 #include <machine/cpu.h> 65 #include <machine/bus.h> 66 67 #include <mvme68k/dev/mainbus.h> 68 #include <mvme68k/dev/pccreg.h> 69 #include <mvme68k/dev/pccvar.h> 70 #include <mvme68k/dev/zsvar.h> 71 72 73 /* Definition of the driver for autoconfig. */ 74 static int zsc_pcc_match __P((struct device *, struct cfdata *, void *)); 75 static void zsc_pcc_attach __P((struct device *, struct device *, void *)); 76 77 struct cfattach zsc_pcc_ca = { 78 sizeof(struct zsc_softc), zsc_pcc_match, zsc_pcc_attach 79 }; 80 81 extern struct cfdriver zsc_cd; 82 83 cons_decl(zsc_pcc); 84 85 86 /* 87 * Is the zs chip present? 88 */ 89 static int 90 zsc_pcc_match(parent, cf, aux) 91 struct device *parent; 92 struct cfdata *cf; 93 void *aux; 94 { 95 struct pcc_attach_args *pa = aux; 96 int unit; 97 98 /* XXX This is bogus; should fix this. */ 99 unit = cf->cf_unit; 100 if (unit < 0 || unit >= NZSC) 101 return (0); 102 103 if (strcmp(pa->pa_name, zsc_cd.cd_name)) 104 return (0); 105 106 pa->pa_ipl = cf->pcccf_ipl; 107 if (pa->pa_ipl == -1) 108 pa->pa_ipl = ZSHARD_PRI; 109 return (1); 110 } 111 112 /* 113 * Attach a found zs. 114 * 115 * Match slave number to zs unit number, so that misconfiguration will 116 * not set up the keyboard as ttya, etc. 117 */ 118 static void 119 zsc_pcc_attach(parent, self, aux) 120 struct device *parent; 121 struct device *self; 122 void *aux; 123 { 124 struct zsc_softc *zsc = (void *) self; 125 struct pcc_attach_args *pa = aux; 126 struct zsdevice zs; 127 bus_space_handle_t bush; 128 int zs_level, ir; 129 static int didintr; 130 131 /* Map the device's registers */ 132 bus_space_map(pa->pa_bust, pa->pa_offset, 4, 0, &bush); 133 134 zs_level = pa->pa_ipl; 135 136 /* XXX: This is a gross hack. I need to bus-space zs.c ... */ 137 zs.zs_chan_b.zc_csr = (volatile u_char *) bush; 138 zs.zs_chan_b.zc_data = (volatile u_char *) bush + 1; 139 zs.zs_chan_a.zc_csr = (volatile u_char *) bush + 2; 140 zs.zs_chan_a.zc_data = (volatile u_char *) bush + 3; 141 142 /* 143 * Do common parts of SCC configuration. 144 * Note that the vector is not actually used by the ZS chip on 145 * MVME-147. We set up the PCC so that it provides the vector. 146 * This is just here so the real vector is printed at config time. 147 */ 148 zs_config(zsc, &zs, PCC_VECBASE + PCCV_ZS, PCLK_147); 149 150 /* 151 * Now safe to install interrupt handlers. Note the arguments 152 * to the interrupt handlers aren't used. Note, we only do this 153 * once since both SCCs interrupt at the same level and vector. 154 */ 155 if (didintr == 0) { 156 didintr = 1; 157 pccintr_establish(PCCV_ZS, zshard_shared, zs_level, zsc); 158 } 159 160 /* Sanity check the interrupt levels. */ 161 ir = pcc_reg_read(sys_pcc, PCCREG_SERIAL_INTR_CTRL); 162 if (((ir & PCC_IMASK) != 0) && 163 ((ir & PCC_IMASK) != zs_level)) 164 panic("zs_pcc_attach: zs configured at different IPLs"); 165 166 /* 167 * Set master interrupt enable. Vector is supplied by the PCC. 168 */ 169 pcc_reg_write(sys_pcc, PCCREG_SERIAL_INTR_CTRL, 170 zs_level | PCC_IENABLE | PCC_ZSEXTERN); 171 zs_write_reg(zsc->zsc_cs[0], 2, PCC_VECBASE + PCCV_ZS); 172 zs_write_reg(zsc->zsc_cs[0], 9, zs_init_reg[9]); 173 } 174 175 /**************************************************************** 176 * Console support functions (MVME PCC specific!) 177 ****************************************************************/ 178 179 /* 180 * Check for SCC console. The MVME-147 always uses unit 0 chan 0. 181 */ 182 void 183 zsc_pcccnprobe(cp) 184 struct consdev *cp; 185 { 186 if (machineid != MVME_147) { 187 cp->cn_pri = CN_DEAD; 188 return; 189 } 190 191 /* Initialize required fields. */ 192 cp->cn_dev = makedev(zs_major, 0); 193 cp->cn_pri = CN_NORMAL; 194 } 195 196 void 197 zsc_pcccninit(cp) 198 struct consdev *cp; 199 { 200 bus_space_tag_t bust = MVME68K_INTIO_BUS_SPACE; 201 bus_space_handle_t bush; 202 struct zsdevice zs; 203 204 bus_space_map(bust, MAINBUS_PCC_OFFSET + PCC_ZS0_OFF, 4, 0, &bush); 205 206 /* XXX: This is a gross hack. I need to bus-space zs.c ... */ 207 zs.zs_chan_b.zc_csr = (volatile u_char *) bush; 208 zs.zs_chan_b.zc_data = (volatile u_char *) bush + 1; 209 zs.zs_chan_a.zc_csr = (volatile u_char *) bush + 2; 210 zs.zs_chan_a.zc_data = (volatile u_char *) bush + 3; 211 212 /* Do common parts of console init. */ 213 zs_cnconfig(0, 0, &zs, PCLK_147); 214 } 215
Indexes created Sun Oct 19 16:10:00 GMT 2025