zs_pcc.c revision 1.16
1 /* $NetBSD: zs_pcc.c,v 1.16 2003/07/15 02:43:48 lukem 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/cdefs.h> 49 __KERNEL_RCSID(0, "$NetBSD: zs_pcc.c,v 1.16 2003/07/15 02:43:48 lukem Exp $"); 50 51 #include <sys/param.h> 52 #include <sys/systm.h> 53 #include <sys/proc.h> 54 #include <sys/device.h> 55 #include <sys/conf.h> 56 #include <sys/file.h> 57 #include <sys/ioctl.h> 58 #include <sys/tty.h> 59 #include <sys/time.h> 60 #include <sys/kernel.h> 61 #include <sys/syslog.h> 62 63 #include <dev/cons.h> 64 #include <dev/ic/z8530reg.h> 65 #include <machine/z8530var.h> 66 67 #include <machine/cpu.h> 68 #include <machine/bus.h> 69 70 #include <mvme68k/dev/mainbus.h> 71 #include <mvme68k/dev/pccreg.h> 72 #include <mvme68k/dev/pccvar.h> 73 #include <mvme68k/dev/zsvar.h> 74 75 76 /* Definition of the driver for autoconfig. */ 77 static int zsc_pcc_match __P((struct device *, struct cfdata *, void *)); 78 static void zsc_pcc_attach __P((struct device *, struct device *, void *)); 79 80 CFATTACH_DECL(zsc_pcc, sizeof(struct zsc_softc), 81 zsc_pcc_match, zsc_pcc_attach, NULL, NULL); 82 83 extern struct cfdriver zsc_cd; 84 85 cons_decl(zsc_pcc); 86 87 88 /* 89 * Is the zs chip present? 90 */ 91 static int 92 zsc_pcc_match(parent, cf, aux) 93 struct device *parent; 94 struct cfdata *cf; 95 void *aux; 96 { 97 struct pcc_attach_args *pa = aux; 98 99 if (strcmp(pa->pa_name, zsc_cd.cd_name)) 100 return (0); 101 102 pa->pa_ipl = cf->pcccf_ipl; 103 if (pa->pa_ipl == -1) 104 pa->pa_ipl = ZSHARD_PRI; 105 return (1); 106 } 107 108 /* 109 * Attach a found zs. 110 * 111 * Match slave number to zs unit number, so that misconfiguration will 112 * not set up the keyboard as ttya, etc. 113 */ 114 static void 115 zsc_pcc_attach(parent, self, aux) 116 struct device *parent; 117 struct device *self; 118 void *aux; 119 { 120 struct zsc_softc *zsc = (void *) self; 121 struct pcc_attach_args *pa = aux; 122 struct zsdevice zs; 123 bus_space_handle_t bush; 124 int zs_level, ir; 125 static int didintr; 126 127 /* Map the device's registers */ 128 bus_space_map(pa->pa_bust, pa->pa_offset, 4, 0, &bush); 129 130 zs_level = pa->pa_ipl; 131 132 /* XXX: This is a gross hack. I need to bus-space zs.c ... */ 133 zs.zs_chan_b.zc_csr = (volatile u_char *) bush; 134 zs.zs_chan_b.zc_data = (volatile u_char *) bush + 1; 135 zs.zs_chan_a.zc_csr = (volatile u_char *) bush + 2; 136 zs.zs_chan_a.zc_data = (volatile u_char *) bush + 3; 137 138 /* 139 * Do common parts of SCC configuration. 140 * Note that the vector is not actually used by the ZS chip on 141 * MVME-147. We set up the PCC so that it provides the vector. 142 * This is just here so the real vector is printed at config time. 143 */ 144 zs_config(zsc, &zs, PCC_VECBASE + PCCV_ZS, PCLK_147); 145 146 evcnt_attach_dynamic(&zsc->zsc_evcnt, EVCNT_TYPE_INTR, 147 pccintr_evcnt(zs_level), "rs232", zsc->zsc_dev.dv_xname); 148 149 /* 150 * Now safe to install interrupt handlers. Note the arguments 151 * to the interrupt handlers aren't used. Note, we only do this 152 * once since both SCCs interrupt at the same level and vector. 153 */ 154 if (didintr == 0) { 155 didintr = 1; 156 pccintr_establish(PCCV_ZS, zshard_shared, zs_level, zsc, NULL); 157 } 158 159 /* Sanity check the interrupt levels. */ 160 ir = pcc_reg_read(sys_pcc, PCCREG_SERIAL_INTR_CTRL); 161 if (((ir & PCC_IMASK) != 0) && 162 ((ir & PCC_IMASK) != zs_level)) 163 panic("zs_pcc_attach: zs configured at different IPLs"); 164 165 /* 166 * Set master interrupt enable. Vector is supplied by the PCC. 167 */ 168 pcc_reg_write(sys_pcc, PCCREG_SERIAL_INTR_CTRL, 169 zs_level | PCC_IENABLE | PCC_ZSEXTERN); 170 zs_write_reg(zsc->zsc_cs[0], 2, PCC_VECBASE + PCCV_ZS); 171 zs_write_reg(zsc->zsc_cs[0], 9, zs_init_reg[9]); 172 } 173 174 /**************************************************************** 175 * Console support functions (MVME PCC specific!) 176 ****************************************************************/ 177 178 /* 179 * Check for SCC console. The MVME-147 always uses unit 0 chan 0. 180 */ 181 void 182 zsc_pcccnprobe(cp) 183 struct consdev *cp; 184 { 185 extern const struct cdevsw zstty_cdevsw; 186 187 if (machineid != MVME_147) { 188 cp->cn_pri = CN_DEAD; 189 return; 190 } 191 192 /* Initialize required fields. */ 193 cp->cn_dev = makedev(cdevsw_lookup_major(&zstty_cdevsw), 0); 194 cp->cn_pri = CN_NORMAL; 195 } 196 197 void 198 zsc_pcccninit(cp) 199 struct consdev *cp; 200 { 201 bus_space_handle_t bush; 202 struct zsdevice zs; 203 204 bus_space_map(&_mainbus_space_tag, 205 intiobase_phys + MAINBUS_PCC_OFFSET + PCC_ZS0_OFF, 4, 0, &bush); 206 207 /* XXX: This is a gross hack. I need to bus-space zs.c ... */ 208 zs.zs_chan_b.zc_csr = (volatile u_char *) bush; 209 zs.zs_chan_b.zc_data = (volatile u_char *) bush + 1; 210 zs.zs_chan_a.zc_csr = (volatile u_char *) bush + 2; 211 zs.zs_chan_a.zc_data = (volatile u_char *) bush + 3; 212 213 /* Do common parts of console init. */ 214 zs_cnconfig(0, 0, &zs, PCLK_147); 215 } 216
Indexes created Sun Sep 28 16:09:52 GMT 2025