1 /* $NetBSD: gsckbc.c,v 1.3 2022/06/13 17:26:34 andvar Exp $ */ 2 /* 3 * Copyright (c) 2004 Jochen Kunz. 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of Jochen Kunz may not be used to endorse or promote 15 * products derived from this software without specific prior 16 * written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY JOCHEN KUNZ 19 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 20 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JOCHEN KUNZ 22 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 /* 32 * hppa GSC bus MD pckbport(9) frontend for the PS/2 ports found in LASI chips. 33 */ 34 35 #include <sys/cdefs.h> 36 __KERNEL_RCSID(0, "$NetBSD: gsckbc.c,v 1.3 2022/06/13 17:26:34 andvar Exp $"); 37 38 /* autoconfig and device stuff */ 39 #include <sys/param.h> 40 #include <sys/device.h> 41 #include <sys/conf.h> 42 #include <machine/iomod.h> 43 #include <machine/autoconf.h> 44 #include <hppa/dev/cpudevs.h> 45 #include <hppa/gsc/gscbusvar.h> 46 #include <hppa/hppa/machdep.h> 47 #include "locators.h" 48 #include "ioconf.h" 49 50 /* bus_space / bus_dma etc. */ 51 #include <sys/bus.h> 52 #include <machine/intr.h> 53 54 /* general system data and functions */ 55 #include <sys/systm.h> 56 #include <sys/ioctl.h> 57 #include <sys/ioccom.h> 58 #include <sys/types.h> 59 60 /* pckbport interface */ 61 #include <dev/pckbport/pckbportvar.h> 62 63 /* register offsets */ 64 #define REG_ID 0x0 /* R: ID register */ 65 #define REG_RESET 0x0 /* W: reset port */ 66 #define REG_RCVDATA 0x4 /* R: received data (4 byte FIFO) */ 67 #define REG_XMITDATA 0x4 /* W: data to transmit */ 68 #define REG_CONTROL 0x8 /* Control Bits */ 69 #define REG_STATUS 0xc /* Status Bits */ 70 #define REG_SZ 0xc /* Size of register set */ 71 #define REG_OFFSET 0x100 /* Address Offset of the two ports */ 72 73 /* ID values for REG_ID */ 74 #define ID_KBD 0 /* keyboard port */ 75 #define ID_AUX 1 /* mouse / aux port */ 76 77 /* Control Register Bits (R/W) */ 78 #define CTRL_ENBL 0x01 /* Enable */ 79 #define CTRL_LPBXR 0x02 /* Loopback Xmt/Rcv mode */ 80 #define CTRL_DIAG 0x20 /* Diagnostic mode */ 81 #define CTRL_DATDIR 0x40 /* External data line direct control */ 82 #define CTRL_CLKDIR 0x80 /* External clock line direct control */ 83 84 /* Status Register Bits (RO) */ 85 #define STAT_RBNE 0x01 /* Receive buffer not empty */ 86 #define STAT_TBNE 0x02 /* Transmit buffer not empty */ 87 #define STAT_TERR 0x04 /* Timeout Error */ 88 #define STAT_PERR 0x08 /* Parity Error */ 89 #define STAT_CMPINTR 0x10 /* Composite interrupt */ 90 #define STAT_DATSHD 0x40 /* Data line shadow */ 91 #define STAT_CLKSHD 0x80 /* Clock line shadow */ 92 93 94 95 /* autoconfig stuff */ 96 static int gsckbc_match(device_t, cfdata_t, void *); 97 static void gsckbc_attach(device_t, device_t, void *); 98 99 static int gsckbc_xt_translation(void *, pckbport_slot_t, int); 100 static int gsckbc_send_devcmd(void *, pckbport_slot_t, u_char); 101 static int gsckbc_poll_data1(void *, pckbport_slot_t); 102 static void gsckbc_slot_enable(void *, pckbport_slot_t, int); 103 static void gsckbc_intr_establish(void *, pckbport_slot_t); 104 static void gsckbc_set_poll(void *, pckbport_slot_t, int); 105 106 static int gsckbc_intr(void *); 107 108 109 struct gsckbc_softc { 110 device_t sc_dev; /* general dev info */ 111 bus_space_tag_t sc_iot; /* bus_space(9) tag */ 112 bus_space_handle_t sc_ioh; /* bus_space(9) handle */ 113 struct gsckbc_softc *sc_op; /* other port */ 114 void *sc_ih; /* interrupt handle */ 115 pckbport_slot_t sc_slot; /* kbd or mouse / aux slot */ 116 pckbport_tag_t sc_pckbport; /* port tag */ 117 device_t sc_child; /* our child devices */ 118 int sc_poll; /* if != 0 then pooling mode */ 119 int sc_enable; /* if != 0 then enable */ 120 }; 121 122 123 CFATTACH_DECL_NEW(gsckbc, sizeof(struct gsckbc_softc), gsckbc_match, gsckbc_attach, 124 NULL, NULL); 125 126 127 const struct pckbport_accessops gsckbc_accessops = { 128 gsckbc_xt_translation, 129 gsckbc_send_devcmd, 130 gsckbc_poll_data1, 131 gsckbc_slot_enable, 132 gsckbc_intr_establish, 133 gsckbc_set_poll 134 }; 135 136 137 static int 138 gsckbc_xt_translation(void *cookie, pckbport_slot_t slot, int on) 139 { 140 return 0; 141 } 142 143 144 static int 145 gsckbc_send_devcmd(void *cookie, pckbport_slot_t slot, u_char byte) 146 { 147 struct gsckbc_softc *sc = (struct gsckbc_softc *) cookie; 148 149 if ((bus_space_read_1(sc->sc_iot, sc->sc_ioh, REG_STATUS) & STAT_TBNE) 150 != 0) 151 DELAY(100); 152 if ((bus_space_read_1(sc->sc_iot, sc->sc_ioh, REG_STATUS) & STAT_TBNE) 153 != 0) 154 return 0; 155 bus_space_write_1(sc->sc_iot, sc->sc_ioh, REG_XMITDATA, byte); 156 return 1; 157 } 158 159 160 static int 161 gsckbc_poll_data1(void *cookie, pckbport_slot_t slot) 162 { 163 struct gsckbc_softc *sc = (struct gsckbc_softc *) cookie; 164 int i; 165 166 for (i = 0; i < 1000; i++) { 167 if ((bus_space_read_1(sc->sc_iot, sc->sc_ioh, REG_STATUS) & 168 STAT_RBNE) != 0 || sc->sc_poll == 0) { 169 return bus_space_read_1(sc->sc_iot, sc->sc_ioh, 170 REG_RCVDATA); 171 } 172 DELAY(100); 173 } 174 return -1; 175 } 176 177 178 static void 179 gsckbc_slot_enable(void *cookie, pckbport_slot_t slot, int on) 180 { 181 struct gsckbc_softc *sc = (struct gsckbc_softc *) cookie; 182 183 sc->sc_enable = on; 184 } 185 186 187 static void 188 gsckbc_intr_establish(void *cookie, pckbport_slot_t slot) 189 { 190 return; 191 } 192 193 194 static void 195 gsckbc_set_poll(void *cookie, pckbport_slot_t slot, int on) 196 { 197 struct gsckbc_softc *sc = (struct gsckbc_softc *) cookie; 198 199 sc->sc_poll = on; 200 } 201 202 203 static int 204 gsckbc_intr(void *arg) 205 { 206 struct gsckbc_softc *sc = (struct gsckbc_softc *) arg; 207 int data; 208 209 while ((bus_space_read_1(sc->sc_iot, sc->sc_ioh, REG_STATUS) 210 & STAT_RBNE) != 0 && sc->sc_poll == 0) { 211 data = bus_space_read_1(sc->sc_iot, sc->sc_ioh, REG_RCVDATA); 212 if (sc->sc_enable != 0) 213 pckbportintr(sc->sc_pckbport, sc->sc_slot, data); 214 } 215 while ((bus_space_read_1(sc->sc_op->sc_iot, sc->sc_op->sc_ioh, 216 REG_STATUS) & STAT_RBNE) != 0 && sc->sc_op->sc_poll == 0) { 217 data = bus_space_read_1(sc->sc_op->sc_iot, sc->sc_op->sc_ioh, 218 REG_RCVDATA); 219 if (sc->sc_op->sc_enable != 0) 220 pckbportintr(sc->sc_op->sc_pckbport, sc->sc_op->sc_slot, 221 data); 222 } 223 return 1; 224 } 225 226 227 static int 228 gsckbc_match(device_t parent, cfdata_t match, void *aux) 229 { 230 struct gsc_attach_args *ga = aux; 231 232 if (ga->ga_type.iodc_type == HPPA_TYPE_FIO 233 && ga->ga_type.iodc_sv_model == HPPA_FIO_GPCIO) 234 return(1); 235 return(0); 236 } 237 238 239 static void 240 gsckbc_attach(device_t parent, device_t self, void *aux) 241 { 242 struct gsckbc_softc *sc = device_private(self); 243 struct gsc_attach_args *ga = aux; 244 static struct gsckbc_softc *master_sc; 245 int pagezero_cookie; 246 int i; 247 248 /* 249 * On hppa bus_space_map(9) maps whole pages. (surprise, surprise) 250 * The registers are within the same page so we can do only a single 251 * mapping for both devices. Also both devices use the same IRQ. 252 * Actually you can think of the two PS/2 ports to be a single 253 * device. The firmware lists them as individual devices in the 254 * firmware device tree so we keep this illusion to map the firmware 255 * device tree as close as possible to the kernel device tree. 256 * So we do one mapping and IRQ for both devices. The first device 257 * is called "master", gets the IRQ and the other is the "slave". 258 * 259 * Assumption: Master attaches first, gets the IRQ and has lower HPA. 260 */ 261 sc->sc_dev = self; 262 sc->sc_iot = ga->ga_iot; 263 if (ga->ga_irq >= 0) { 264 if (bus_space_map(sc->sc_iot, ga->ga_hpa, REG_SZ + REG_OFFSET, 265 0, &sc->sc_ioh)) { 266 aprint_normal(": gsckbc_attach: can't map I/O space\n"); 267 return; 268 } 269 aprint_debug(" (master)"); 270 sc->sc_ih = hppa_intr_establish(IPL_TTY, gsckbc_intr, sc, 271 ga->ga_ir, ga->ga_irq); 272 master_sc = sc; 273 } else { 274 if (master_sc == NULL) { 275 aprint_normal(": can't find master device\n"); 276 return; 277 } 278 sc->sc_op = master_sc; 279 master_sc->sc_op = sc; 280 sc->sc_ioh = sc->sc_op->sc_ioh + REG_OFFSET; 281 aprint_debug(" (slave)"); 282 } 283 /* We start in polling mode. */ 284 sc->sc_poll = 1; 285 /* Reset port. */ 286 bus_space_write_1(sc->sc_iot, sc->sc_ioh, REG_RESET, 0); 287 /* Enable port hardware. */ 288 bus_space_write_1(sc->sc_iot, sc->sc_ioh, REG_CONTROL, CTRL_ENBL); 289 /* Flush RX FIFO. */ 290 for (i = 0; i < 5; i++) 291 bus_space_read_1(sc->sc_iot, sc->sc_ioh, REG_RCVDATA); 292 if (bus_space_read_1(sc->sc_iot, sc->sc_ioh, REG_ID) == ID_KBD) { 293 aprint_normal(": keyboard\n"); 294 sc->sc_slot = PCKBPORT_KBD_SLOT; 295 pagezero_cookie = hppa_pagezero_map(); 296 if ((hppa_hpa_t)PAGE0->mem_kbd.pz_hpa == ga->ga_hpa) { 297 if (pckbport_cnattach(sc, &gsckbc_accessops, 298 sc->sc_slot) != 0) 299 aprint_normal("Failed to attach console " 300 "keyboard!\n"); 301 else 302 sc->sc_enable = 1; 303 } 304 hppa_pagezero_unmap(pagezero_cookie); 305 } else { 306 aprint_normal(": mouse\n"); 307 sc->sc_slot = PCKBPORT_AUX_SLOT; 308 } 309 sc->sc_pckbport = pckbport_attach(sc, &gsckbc_accessops); 310 if (sc->sc_pckbport != NULL) 311 sc->sc_child = pckbport_attach_slot(self, sc->sc_pckbport, 312 sc->sc_slot); 313 sc->sc_poll = 0; 314 } 315 316
Indexes created Sun Oct 25 00:26:45 UTC 2026