1 /* $NetBSD: zs_pcc.c,v 1.12 2001/05/31 18:46:09 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@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 97 if (strcmp(pa->pa_name, zsc_cd.cd_name)) 98 return (0); 99 100 pa->pa_ipl = cf->pcccf_ipl; 101 if (pa->pa_ipl == -1) 102 pa->pa_ipl = ZSHARD_PRI; 103 return (1); 104 } 105 106 /* 107 * Attach a found zs. 108 * 109 * Match slave number to zs unit number, so that misconfiguration will 110 * not set up the keyboard as ttya, etc. 111 */ 112 static void 113 zsc_pcc_attach(parent, self, aux) 114 struct device *parent; 115 struct device *self; 116 void *aux; 117 { 118 struct zsc_softc *zsc = (void *) self; 119 struct pcc_attach_args *pa = aux; 120 struct zsdevice zs; 121 bus_space_handle_t bush; 122 int zs_level, ir; 123 static int didintr; 124 125 /* Map the device's registers */ 126 bus_space_map(pa->pa_bust, pa->pa_offset, 4, 0, &bush); 127 128 zs_level = pa->pa_ipl; 129 130 /* XXX: This is a gross hack. I need to bus-space zs.c ... */ 131 zs.zs_chan_b.zc_csr = (volatile u_char *) bush; 132 zs.zs_chan_b.zc_data = (volatile u_char *) bush + 1; 133 zs.zs_chan_a.zc_csr = (volatile u_char *) bush + 2; 134 zs.zs_chan_a.zc_data = (volatile u_char *) bush + 3; 135 136 /* 137 * Do common parts of SCC configuration. 138 * Note that the vector is not actually used by the ZS chip on 139 * MVME-147. We set up the PCC so that it provides the vector. 140 * This is just here so the real vector is printed at config time. 141 */ 142 zs_config(zsc, &zs, PCC_VECBASE + PCCV_ZS, PCLK_147); 143 144 evcnt_attach_dynamic(&zsc->zsc_evcnt, EVCNT_TYPE_INTR, 145 pccintr_evcnt(zs_level), "rs232", zsc->zsc_dev.dv_xname); 146 147 /* 148 * Now safe to install interrupt handlers. Note the arguments 149 * to the interrupt handlers aren't used. Note, we only do this 150 * once since both SCCs interrupt at the same level and vector. 151 */ 152 if (didintr == 0) { 153 didintr = 1; 154 pccintr_establish(PCCV_ZS, zshard_shared, zs_level, zsc, NULL); 155 } 156 157 /* Sanity check the interrupt levels. */ 158 ir = pcc_reg_read(sys_pcc, PCCREG_SERIAL_INTR_CTRL); 159 if (((ir & PCC_IMASK) != 0) && 160 ((ir & PCC_IMASK) != zs_level)) 161 panic("zs_pcc_attach: zs configured at different IPLs"); 162 163 /* 164 * Set master interrupt enable. Vector is supplied by the PCC. 165 */ 166 pcc_reg_write(sys_pcc, PCCREG_SERIAL_INTR_CTRL, 167 zs_level | PCC_IENABLE | PCC_ZSEXTERN); 168 zs_write_reg(zsc->zsc_cs[0], 2, PCC_VECBASE + PCCV_ZS); 169 zs_write_reg(zsc->zsc_cs[0], 9, zs_init_reg[9]); 170 } 171 172 /**************************************************************** 173 * Console support functions (MVME PCC specific!) 174 ****************************************************************/ 175 176 /* 177 * Check for SCC console. The MVME-147 always uses unit 0 chan 0. 178 */ 179 void 180 zsc_pcccnprobe(cp) 181 struct consdev *cp; 182 { 183 if (machineid != MVME_147) { 184 cp->cn_pri = CN_DEAD; 185 return; 186 } 187 188 /* Initialize required fields. */ 189 cp->cn_dev = makedev(zs_major, 0); 190 cp->cn_pri = CN_NORMAL; 191 } 192 193 void 194 zsc_pcccninit(cp) 195 struct consdev *cp; 196 { 197 bus_space_handle_t bush; 198 struct zsdevice zs; 199 200 bus_space_map(&_mainbus_space_tag, 201 intiobase_phys + MAINBUS_PCC_OFFSET + PCC_ZS0_OFF, 4, 0, &bush); 202 203 /* XXX: This is a gross hack. I need to bus-space zs.c ... */ 204 zs.zs_chan_b.zc_csr = (volatile u_char *) bush; 205 zs.zs_chan_b.zc_data = (volatile u_char *) bush + 1; 206 zs.zs_chan_a.zc_csr = (volatile u_char *) bush + 2; 207 zs.zs_chan_a.zc_data = (volatile u_char *) bush + 3; 208 209 /* Do common parts of console init. */ 210 zs_cnconfig(0, 0, &zs, PCLK_147); 211 } 212