zs_pcc.c revision 1.19
1 /* $NetBSD: zs_pcc.c,v 1.19 2008/01/12 09:54:27 tsutsui 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 1.19 2008/01/12 09:54:27 tsutsui 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 #include "ioconf.h" 76 77 /* Definition of the driver for autoconfig. */ 78 static int zsc_pcc_match(struct device *, struct cfdata *, void *); 79 static void zsc_pcc_attach(struct device *, struct device *, void *); 80 81 CFATTACH_DECL(zsc_pcc, sizeof(struct zsc_softc), 82 zsc_pcc_match, zsc_pcc_attach, NULL, NULL); 83 84 cons_decl(zsc_pcc); 85 86 87 /* 88 * Is the zs chip present? 89 */ 90 static int 91 zsc_pcc_match(struct device *parent, struct cfdata *cf, void *aux) 92 { 93 struct pcc_attach_args *pa = aux; 94 95 if (strcmp(pa->pa_name, zsc_cd.cd_name)) 96 return 0; 97 98 pa->pa_ipl = cf->pcccf_ipl; 99 if (pa->pa_ipl == -1) 100 pa->pa_ipl = ZSHARD_PRI; 101 return 1; 102 } 103 104 /* 105 * Attach a found zs. 106 * 107 * Match slave number to zs unit number, so that misconfiguration will 108 * not set up the keyboard as ttya, etc. 109 */ 110 static void 111 zsc_pcc_attach(struct device *parent, struct device *self, void *aux) 112 { 113 struct zsc_softc *zsc = (void *)self; 114 struct pcc_attach_args *pa = aux; 115 struct zsdevice zs; 116 bus_space_handle_t bush; 117 int zs_level, ir; 118 static int didintr; 119 120 /* Map the device's registers */ 121 bus_space_map(pa->pa_bust, pa->pa_offset, 4, 0, &bush); 122 123 zs_level = pa->pa_ipl; 124 125 /* XXX: This is a gross hack. I need to bus-space zs.c ... */ 126 zs.zs_chan_b.zc_csr = (volatile u_char *)bush; 127 zs.zs_chan_b.zc_data = (volatile u_char *)bush + 1; 128 zs.zs_chan_a.zc_csr = (volatile u_char *)bush + 2; 129 zs.zs_chan_a.zc_data = (volatile u_char *)bush + 3; 130 131 /* 132 * Do common parts of SCC configuration. 133 * Note that the vector is not actually used by the ZS chip on 134 * MVME-147. We set up the PCC so that it provides the vector. 135 * This is just here so the real vector is printed at config time. 136 */ 137 zs_config(zsc, &zs, PCC_VECBASE + PCCV_ZS, PCLK_147); 138 139 evcnt_attach_dynamic(&zsc->zsc_evcnt, EVCNT_TYPE_INTR, 140 pccintr_evcnt(zs_level), "rs232", zsc->zsc_dev.dv_xname); 141 142 /* 143 * Now safe to install interrupt handlers. Note the arguments 144 * to the interrupt handlers aren't used. Note, we only do this 145 * once since both SCCs interrupt at the same level and vector. 146 */ 147 if (didintr == 0) { 148 didintr = 1; 149 pccintr_establish(PCCV_ZS, zshard_shared, zs_level, zsc, NULL); 150 } 151 152 /* Sanity check the interrupt levels. */ 153 ir = pcc_reg_read(sys_pcc, PCCREG_SERIAL_INTR_CTRL); 154 if (((ir & PCC_IMASK) != 0) && 155 ((ir & PCC_IMASK) != zs_level)) 156 panic("%s: zs configured at different IPLs", __func__); 157 158 /* 159 * Set master interrupt enable. Vector is supplied by the PCC. 160 */ 161 pcc_reg_write(sys_pcc, PCCREG_SERIAL_INTR_CTRL, 162 zs_level | PCC_IENABLE | PCC_ZSEXTERN); 163 zs_write_reg(zsc->zsc_cs[0], 2, PCC_VECBASE + PCCV_ZS); 164 zs_write_reg(zsc->zsc_cs[0], 9, zs_init_reg[9]); 165 } 166 167 /**************************************************************** 168 * Console support functions (MVME PCC specific!) 169 ****************************************************************/ 170 171 /* 172 * Check for SCC console. The MVME-147 always uses unit 0 chan 0. 173 */ 174 void 175 zsc_pcccnprobe(struct consdev *cp) 176 { 177 extern const struct cdevsw zstty_cdevsw; 178 179 if (machineid != MVME_147) { 180 cp->cn_pri = CN_DEAD; 181 return; 182 } 183 184 /* Initialize required fields. */ 185 cp->cn_dev = makedev(cdevsw_lookup_major(&zstty_cdevsw), 0); 186 cp->cn_pri = CN_NORMAL; 187 } 188 189 void 190 zsc_pcccninit(struct consdev *cp) 191 { 192 bus_space_handle_t bush; 193 struct zsdevice zs; 194 195 bus_space_map(&_mainbus_space_tag, 196 intiobase_phys + MAINBUS_PCC_OFFSET + PCC_ZS0_OFF, 4, 0, &bush); 197 198 /* XXX: This is a gross hack. I need to bus-space zs.c ... */ 199 zs.zs_chan_b.zc_csr = (volatile u_char *)bush; 200 zs.zs_chan_b.zc_data = (volatile u_char *)bush + 1; 201 zs.zs_chan_a.zc_csr = (volatile u_char *)bush + 2; 202 zs.zs_chan_a.zc_data = (volatile u_char *)bush + 3; 203 204 /* Do common parts of console init. */ 205 zs_cnconfig(0, 0, &zs, PCLK_147); 206 } 207
Indexes created Mon Sep 29 21:09:56 GMT 2025