lms.c revision 1.46
1 /* $NetBSD: lms.c,v 1.46 2005/02/03 21:08:58 perry Exp $ */ 2 3 /*- 4 * Copyright (c) 1993, 1994 Charles M. Hannum. 5 * Copyright (c) 1992, 1993 Erik Forsberg. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 14 * THIS SOFTWARE IS PROVIDED BY ``AS IS'' AND ANY EXPRESS OR IMPLIED 15 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 16 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN 17 * NO EVENT SHALL I BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 21 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 22 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 23 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #include <sys/cdefs.h> 27 __KERNEL_RCSID(0, "$NetBSD: lms.c,v 1.46 2005/02/03 21:08:58 perry Exp $"); 28 29 #include <sys/param.h> 30 #include <sys/systm.h> 31 #include <sys/ioctl.h> 32 #include <sys/device.h> 33 34 #include <machine/bus.h> 35 #include <machine/intr.h> 36 37 #include <dev/isa/isavar.h> 38 39 #include <dev/wscons/wsconsio.h> 40 #include <dev/wscons/wsmousevar.h> 41 42 #define LMS_DATA 0 /* offset for data port, read-only */ 43 #define LMS_SIGN 1 /* offset for signature port, read-write */ 44 #define LMS_INTR 2 /* offset for interrupt port, read-only */ 45 #define LMS_CNTRL 2 /* offset for control port, write-only */ 46 #define LMS_CONFIG 3 /* for configuration port, read-write */ 47 #define LMS_NPORTS 4 48 49 struct lms_softc { /* driver status information */ 50 struct device sc_dev; 51 void *sc_ih; 52 53 bus_space_tag_t sc_iot; /* bus i/o space identifier */ 54 bus_space_handle_t sc_ioh; /* bus i/o handle */ 55 56 int sc_enabled; /* device is open */ 57 int oldbuttons; /* mouse button status */ 58 59 struct device *sc_wsmousedev; 60 }; 61 62 int lmsprobe(struct device *, struct cfdata *, void *); 63 void lmsattach(struct device *, struct device *, void *); 64 int lmsintr(void *); 65 66 CFATTACH_DECL(lms, sizeof(struct lms_softc), 67 lmsprobe, lmsattach, NULL, NULL); 68 69 int lms_enable(void *); 70 int lms_ioctl(void *, u_long, caddr_t, int, struct proc *); 71 void lms_disable(void *); 72 73 const struct wsmouse_accessops lms_accessops = { 74 lms_enable, 75 lms_ioctl, 76 lms_disable, 77 }; 78 79 int 80 lmsprobe(struct device *parent, struct cfdata *match, void *aux) 81 { 82 struct isa_attach_args *ia = aux; 83 bus_space_tag_t iot = ia->ia_iot; 84 bus_space_handle_t ioh; 85 int rv; 86 87 if (ia->ia_nio < 1) 88 return (0); 89 if (ia->ia_nirq < 1) 90 return (0); 91 92 if (ISA_DIRECT_CONFIG(ia)) 93 return (0); 94 95 /* Disallow wildcarded i/o base. */ 96 if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT) 97 return 0; 98 if (ia->ia_irq[0].ir_irq == ISA_UNKNOWN_IRQ) 99 return 0; 100 101 /* Map the i/o space. */ 102 if (bus_space_map(iot, ia->ia_io[0].ir_addr, LMS_NPORTS, 0, &ioh)) 103 return 0; 104 105 rv = 0; 106 107 /* Configure and check for port present. */ 108 bus_space_write_1(iot, ioh, LMS_CONFIG, 0x91); 109 delay(10); 110 bus_space_write_1(iot, ioh, LMS_SIGN, 0x0c); 111 delay(10); 112 if (bus_space_read_1(iot, ioh, LMS_SIGN) != 0x0c) 113 goto out; 114 bus_space_write_1(iot, ioh, LMS_SIGN, 0x50); 115 delay(10); 116 if (bus_space_read_1(iot, ioh, LMS_SIGN) != 0x50) 117 goto out; 118 119 /* Disable interrupts. */ 120 bus_space_write_1(iot, ioh, LMS_CNTRL, 0x10); 121 122 rv = 1; 123 ia->ia_nio = 1; 124 ia->ia_io[0].ir_size = LMS_NPORTS; 125 126 ia->ia_nirq = 1; 127 128 ia->ia_niomem = 0; 129 ia->ia_ndrq = 0; 130 131 out: 132 bus_space_unmap(iot, ioh, LMS_NPORTS); 133 return rv; 134 } 135 136 void 137 lmsattach(struct device *parent, struct device *self, void *aux) 138 { 139 struct lms_softc *sc = (void *)self; 140 struct isa_attach_args *ia = aux; 141 bus_space_tag_t iot = ia->ia_iot; 142 bus_space_handle_t ioh; 143 struct wsmousedev_attach_args a; 144 145 printf("\n"); 146 147 if (bus_space_map(iot, ia->ia_io[0].ir_addr, LMS_NPORTS, 0, &ioh)) { 148 printf("%s: can't map i/o space\n", sc->sc_dev.dv_xname); 149 return; 150 } 151 152 /* Other initialization was done by lmsprobe. */ 153 sc->sc_iot = iot; 154 sc->sc_ioh = ioh; 155 sc->sc_enabled = 0; 156 157 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq[0].ir_irq, 158 IST_PULSE, IPL_TTY, lmsintr, sc); 159 160 a.accessops = &lms_accessops; 161 a.accesscookie = sc; 162 163 /* 164 * Attach the wsmouse, saving a handle to it. 165 * Note that we don't need to check this pointer against NULL 166 * here or in psmintr, because if this fails lms_enable() will 167 * never be called, so lmsintr() will never be called. 168 */ 169 sc->sc_wsmousedev = config_found(self, &a, wsmousedevprint); 170 } 171 172 int 173 lms_enable(void *v) 174 { 175 struct lms_softc *sc = v; 176 177 if (sc->sc_enabled) 178 return EBUSY; 179 180 sc->sc_enabled = 1; 181 sc->oldbuttons = 0; 182 183 /* Enable interrupts. */ 184 bus_space_write_1(sc->sc_iot, sc->sc_ioh, LMS_CNTRL, 0); 185 186 return 0; 187 } 188 189 void 190 lms_disable(void *v) 191 { 192 struct lms_softc *sc = v; 193 194 /* Disable interrupts. */ 195 bus_space_write_1(sc->sc_iot, sc->sc_ioh, LMS_CNTRL, 0x10); 196 197 sc->sc_enabled = 0; 198 } 199 200 int 201 lms_ioctl(void *v, u_long cmd, caddr_t data, int flag, struct proc *p) 202 { 203 #if 0 204 struct lms_softc *sc = v; 205 #endif 206 207 switch (cmd) { 208 case WSMOUSEIO_GTYPE: 209 *(u_int *)data = WSMOUSE_TYPE_LMS; 210 return (0); 211 } 212 return (EPASSTHROUGH); 213 } 214 215 int 216 lmsintr(void *arg) 217 { 218 struct lms_softc *sc = arg; 219 bus_space_tag_t iot = sc->sc_iot; 220 bus_space_handle_t ioh = sc->sc_ioh; 221 u_char hi, lo; 222 signed char dx, dy; 223 u_int buttons; 224 int changed; 225 226 if (!sc->sc_enabled) 227 /* Interrupts are not expected. */ 228 return 0; 229 230 bus_space_write_1(iot, ioh, LMS_CNTRL, 0xab); 231 hi = bus_space_read_1(iot, ioh, LMS_DATA); 232 bus_space_write_1(iot, ioh, LMS_CNTRL, 0x90); 233 lo = bus_space_read_1(iot, ioh, LMS_DATA); 234 dx = ((hi & 0x0f) << 4) | (lo & 0x0f); 235 /* Bounding at -127 avoids a bug in XFree86. */ 236 dx = (dx == -128) ? -127 : dx; 237 238 bus_space_write_1(iot, ioh, LMS_CNTRL, 0xf0); 239 hi = bus_space_read_1(iot, ioh, LMS_DATA); 240 bus_space_write_1(iot, ioh, LMS_CNTRL, 0xd0); 241 lo = bus_space_read_1(iot, ioh, LMS_DATA); 242 dy = ((hi & 0x0f) << 4) | (lo & 0x0f); 243 dy = (dy == -128) ? 127 : -dy; 244 245 bus_space_write_1(iot, ioh, LMS_CNTRL, 0); 246 247 buttons = ((hi & 0x80) ? 0 : 0x1) | 248 ((hi & 0x40) ? 0 : 0x2) | 249 ((hi & 0x20) ? 0 : 0x4); 250 changed = (buttons ^ sc->oldbuttons); 251 sc->oldbuttons = buttons; 252 253 if (dx || dy || changed) 254 wsmouse_input(sc->sc_wsmousedev, 255 buttons, dx, dy, 0, WSMOUSE_INPUT_DELTA); 256 257 return -1; 258 } 259
Indexes created Thu Nov 06 07:09:58 GMT 2025