1 /* $NetBSD: zs_pcc.c,v 1.22 2026/04/26 18:02:57 thorpej 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Zilog Z8530 Dual UART driver (machine-dependent part) 34 * 35 * Runs two serial lines per chip using slave drivers. 36 * Plain tty/async lines use the zs_async slave. 37 * 38 * Modified for NetBSD/mvme68k by Jason R. Thorpe <thorpej (at) NetBSD.org> 39 */ 40 41 #include <sys/cdefs.h> 42 __KERNEL_RCSID(0, "$NetBSD: zs_pcc.c,v 1.22 2026/04/26 18:02:57 thorpej Exp $"); 43 44 #define _M68K_BUS_SPACE_PRIVATE 45 46 #include <sys/param.h> 47 #include <sys/systm.h> 48 #include <sys/proc.h> 49 #include <sys/device.h> 50 #include <sys/conf.h> 51 #include <sys/file.h> 52 #include <sys/ioctl.h> 53 #include <sys/tty.h> 54 #include <sys/time.h> 55 #include <sys/kernel.h> 56 #include <sys/syslog.h> 57 58 #include <dev/cons.h> 59 #include <dev/ic/z8530reg.h> 60 #include <machine/z8530var.h> 61 62 #include <machine/cpu.h> 63 #include <machine/bus.h> 64 65 #include <mvme68k/dev/mainbus.h> 66 #include <mvme68k/dev/pccreg.h> 67 #include <mvme68k/dev/pccvar.h> 68 #include <mvme68k/dev/zsvar.h> 69 70 #include "ioconf.h" 71 72 /* Definition of the driver for autoconfig. */ 73 static int zsc_pcc_match(device_t, cfdata_t, void *); 74 static void zsc_pcc_attach(device_t, device_t, void *); 75 76 CFATTACH_DECL_NEW(zsc_pcc, sizeof(struct zsc_softc), 77 zsc_pcc_match, zsc_pcc_attach, NULL, NULL); 78 79 cons_decl(zsc_pcc); 80 81 82 /* 83 * Is the zs chip present? 84 */ 85 static int 86 zsc_pcc_match(device_t parent, cfdata_t cf, void *aux) 87 { 88 struct pcc_attach_args *pa = aux; 89 90 if (strcmp(pa->pa_name, zsc_cd.cd_name)) 91 return 0; 92 93 pa->pa_ipl = cf->pcccf_ipl; 94 if (pa->pa_ipl == -1) 95 pa->pa_ipl = ZSHARD_PRI; 96 return 1; 97 } 98 99 /* 100 * Attach a found zs. 101 * 102 * Match slave number to zs unit number, so that misconfiguration will 103 * not set up the keyboard as ttya, etc. 104 */ 105 static void 106 zsc_pcc_attach(device_t parent, device_t self, void *aux) 107 { 108 struct zsc_softc *zsc = device_private(self); 109 struct pcc_attach_args *pa = aux; 110 struct zsdevice zs; 111 bus_space_handle_t bush; 112 int zs_level, ir; 113 static int didintr; 114 115 zsc->zsc_dev = self; 116 117 /* Map the device's registers */ 118 bus_space_map(pa->pa_bust, pa->pa_offset, 4, 0, &bush); 119 120 zs_level = pa->pa_ipl; 121 122 /* XXX: This is a gross hack. I need to bus-space zs.c ... */ 123 zs.zs_chan_b.zc_csr = (volatile uint8_t *)bush; 124 zs.zs_chan_b.zc_data = (volatile uint8_t *)bush + 1; 125 zs.zs_chan_a.zc_csr = (volatile uint8_t *)bush + 2; 126 zs.zs_chan_a.zc_data = (volatile uint8_t *)bush + 3; 127 128 /* 129 * Do common parts of SCC configuration. 130 * Note that the vector is not actually used by the ZS chip on 131 * MVME-147. We set up the PCC so that it provides the vector. 132 * This is just here so the real vector is printed at config time. 133 */ 134 zs_config(zsc, &zs, PCC_VECBASE + PCCV_ZS, PCLK_147); 135 136 evcnt_attach_dynamic(&zsc->zsc_evcnt, EVCNT_TYPE_INTR, 137 pccintr_evcnt(zs_level), "rs232", device_xname(zsc->zsc_dev)); 138 139 /* 140 * Now safe to install interrupt handlers. Note the arguments 141 * to the interrupt handlers aren't used. Note, we only do this 142 * once since both SCCs interrupt at the same level and vector. 143 */ 144 if (didintr == 0) { 145 didintr = 1; 146 pccintr_establish(PCCV_ZS, zshard_shared, zs_level, zsc, NULL); 147 } 148 149 /* Sanity check the interrupt levels. */ 150 ir = pcc_reg_read(sys_pcc, PCCREG_SERIAL_INTR_CTRL); 151 if (((ir & PCC_IMASK) != 0) && 152 ((ir & PCC_IMASK) != zs_level)) 153 panic("%s: zs configured at different IPLs", __func__); 154 155 /* 156 * Set master interrupt enable. Vector is supplied by the PCC. 157 */ 158 pcc_reg_write(sys_pcc, PCCREG_SERIAL_INTR_CTRL, 159 zs_level | PCC_IENABLE | PCC_ZSEXTERN); 160 zs_write_reg(zsc->zsc_cs[0], 2, PCC_VECBASE + PCCV_ZS); 161 zs_write_reg(zsc->zsc_cs[0], 9, zs_init_reg[9]); 162 } 163 164 /**************************************************************** 165 * Console support functions (MVME PCC specific!) 166 ****************************************************************/ 167 168 /* 169 * Check for SCC console. The MVME-147 always uses unit 0 chan 0. 170 */ 171 void 172 zsc_pcccnprobe(struct consdev *cp) 173 { 174 extern const struct cdevsw zstty_cdevsw; 175 176 if (machineid != MVME_147) { 177 cp->cn_pri = CN_DEAD; 178 return; 179 } 180 181 /* Initialize required fields. */ 182 cp->cn_dev = makedev(cdevsw_lookup_major(&zstty_cdevsw), 0); 183 cp->cn_pri = CN_NORMAL; 184 } 185 186 void 187 zsc_pcccninit(struct consdev *cp) 188 { 189 bus_space_handle_t bush; 190 struct zsdevice zs; 191 192 bus_space_map(&m68k_simple_bus_space, 193 intiobase_phys + MAINBUS_PCC_OFFSET + PCC_ZS0_OFF, 4, 0, &bush); 194 195 /* XXX: This is a gross hack. I need to bus-space zs.c ... */ 196 zs.zs_chan_b.zc_csr = (volatile uint8_t *)bush; 197 zs.zs_chan_b.zc_data = (volatile uint8_t *)bush + 1; 198 zs.zs_chan_a.zc_csr = (volatile uint8_t *)bush + 2; 199 zs.zs_chan_a.zc_data = (volatile uint8_t *)bush + 3; 200 201 /* Do common parts of console init. */ 202 zs_cnconfig(0, 0, &zs, PCLK_147); 203 } 204
Indexes created Sun Oct 25 00:26:45 UTC 2026