ipaq_atmelgpio.c revision 1.6
1 /* $NetBSD: ipaq_atmelgpio.c,v 1.6 2003/07/15 00:25:07 lukem Exp $ */ 2 3 /*- 4 * Copyright (c) 2001 The NetBSD Foundation, Inc. All rights reserved. 5 * 6 * This code is derived from software contributed to The NetBSD Foundation 7 * by Ichiro FUKUHARA (ichiro (at) ichiro.org). 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the NetBSD 20 * Foundation, Inc. and its contributors. 21 * 4. Neither the name of The NetBSD Foundation nor the names of its 22 * contributors may be used to endorse or promote products derived 23 * from this software without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 26 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 /* 38 * iPAQ uses Atmel microcontroller to service a few of peripheral devices. 39 * This controller connect to UART1 of SA11x0. 40 */ 41 42 #include <sys/cdefs.h> 43 __KERNEL_RCSID(0, "$NetBSD: ipaq_atmelgpio.c,v 1.6 2003/07/15 00:25:07 lukem Exp $"); 44 45 #include <sys/param.h> 46 #include <sys/systm.h> 47 #include <sys/types.h> 48 #include <sys/conf.h> 49 #include <sys/file.h> 50 #include <sys/device.h> 51 #include <sys/kernel.h> 52 #include <sys/kthread.h> 53 #include <sys/malloc.h> 54 55 #include <machine/bus.h> 56 57 #include <hpcarm/dev/ipaq_saipvar.h> 58 #include <hpcarm/dev/ipaq_gpioreg.h> 59 #include <hpcarm/dev/ipaq_atmel.h> 60 #include <hpcarm/dev/ipaq_atmelvar.h> 61 #include <hpcarm/sa11x0/sa11x0_gpioreg.h> 62 #include <hpcarm/sa11x0/sa11x0_comreg.h> 63 #include <hpcarm/sa11x0/sa11x0_reg.h> 64 65 #ifdef ATMEL_DEBUG 66 #define DPRINTF(x) printf x 67 #else 68 #define DPRINTF(x) 69 #endif 70 71 static int atmelgpio_match(struct device *, struct cfdata *, void *); 72 static void atmelgpio_attach(struct device *, struct device *, void *); 73 static int atmelgpio_print(void *, const char *); 74 static int atmelgpio_search(struct device *, struct cfdata *, void *); 75 static void atmelgpio_init(struct atmelgpio_softc *); 76 77 static void rxtx_data(struct atmelgpio_softc *, int, int, 78 u_int8_t *, struct atmel_rx *); 79 80 CFATTACH_DECL(atmelgpio, sizeof(struct atmelgpio_softc), 81 atmelgpio_match, atmelgpio_attach, NULL, NULL); 82 83 static int 84 atmelgpio_match(parent, cf, aux) 85 struct device *parent; 86 struct cfdata *cf; 87 void *aux; 88 { 89 return (1); 90 } 91 92 static void 93 atmelgpio_attach(parent, self, aux) 94 struct device *parent; 95 struct device *self; 96 void *aux; 97 { 98 struct atmelgpio_softc *sc = (struct atmelgpio_softc *)self; 99 struct ipaq_softc *psc = (struct ipaq_softc *)parent; 100 101 struct atmel_rx *rxbuf; 102 103 printf("\n"); 104 printf("%s: Atmel microcontroller GPIO\n", sc->sc_dev.dv_xname); 105 106 sc->sc_iot = psc->sc_iot; 107 sc->sc_ioh = psc->sc_ioh; 108 sc->sc_parent = (struct ipaq_softc *)parent; 109 110 if (bus_space_map(sc->sc_iot, SACOM1_BASE, SACOM_NPORTS, 0, 111 &sc->sc_ioh)) { 112 printf("%s: unable to map of UART1 registers\n", sc->sc_dev.dv_xname); 113 return; 114 } 115 116 atmelgpio_init(sc); 117 118 #if 1 /* this is sample */ 119 rxtx_data(sc, STATUS_BATTERY, 0, NULL, rxbuf); 120 121 printf("ac_status = %x\n", rxbuf->data[0]); 122 printf("Battery kind = %x\n", rxbuf->data[1]); 123 printf("Voltage = %d mV\n", 124 1000 * (rxbuf->data[3] << 8 | rxbuf->data[2]) /228); 125 printf("Battery Status = %x\n", rxbuf->data[4]); 126 printf("Battery percentage = %d\n", 127 425 * (rxbuf->data[3] << 8 | rxbuf->data[2]) /1000 - 298); 128 #endif 129 130 /* 131 * Attach each devices 132 */ 133 134 config_search(atmelgpio_search, self, NULL); 135 } 136 137 static int 138 atmelgpio_search(parent, cf, aux) 139 struct device *parent; 140 struct cfdata *cf; 141 void *aux; 142 { 143 if (config_match(parent, cf, NULL) > 0) 144 config_attach(parent, cf, NULL, atmelgpio_print); 145 return 0; 146 } 147 148 149 static int 150 atmelgpio_print(aux, name) 151 void *aux; 152 const char *name; 153 { 154 return (UNCONF); 155 } 156 157 static void 158 atmelgpio_init(sc) 159 struct atmelgpio_softc *sc; 160 { 161 /* 8 bits no parity 1 stop bit */ 162 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR0, CR0_DSS); 163 164 /* Set baud rate 115k */ 165 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR1, 0); 166 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR2, SACOMSPEED(115200)); 167 168 /* RX/TX enable, RX/TX FIFO interrupt enable */ 169 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR3, 170 (CR3_RXE | CR3_TXE | CR3_RIE | CR3_TIE)); 171 } 172 173 static void 174 rxtx_data(sc, id, size, buf, rxbuf) 175 struct atmelgpio_softc *sc; 176 int id, size; 177 u_int8_t *buf; 178 struct atmel_rx *rxbuf; 179 { 180 int i, checksum, length, rx_data; 181 u_int8_t data[MAX_SENDSIZE]; 182 183 length = size + FRAME_OVERHEAD_SIZE; 184 185 while (! (bus_space_read_4(sc->sc_iot, sc->sc_ioh, SACOM_SR0) & SR0_TFS)) 186 ; 187 188 data[0] = (u_int8_t)FRAME_SOF; 189 data[1] = (u_int8_t)((id << 4) | size); 190 checksum = data[1]; 191 i = 2; 192 while (size--) { 193 data[i++] = *buf; 194 checksum += (u_int8_t)(*buf++); 195 } 196 data[length-1] = checksum; 197 198 while (! (bus_space_read_4(sc->sc_iot, sc->sc_ioh, SACOM_SR1) & SR1_TNF)) 199 ; 200 i = 0; 201 while (i < length) 202 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_DR, data[i++]); 203 204 delay(10000); 205 #if 0 206 while (! (bus_space_read_4(sc->sc_iot, sc->sc_ioh, SACOM_SR0) & 207 (SR0_RID | SR0_RFS))) 208 #endif 209 rxbuf->state = STATE_SOF; 210 while (bus_space_read_4(sc->sc_iot, sc->sc_ioh, SACOM_SR1) & SR1_RNE) { 211 212 rx_data = bus_space_read_4(sc->sc_iot, sc->sc_ioh, SACOM_DR); 213 DPRINTF(("DATA = %x\n", rx_data)); 214 215 switch (rxbuf->state) { 216 case STATE_SOF: 217 if (rx_data == FRAME_SOF) 218 rxbuf->state = STATE_ID; 219 break; 220 case STATE_ID: 221 rxbuf->id = (rx_data & 0xf0) >> 4; 222 rxbuf->len = rx_data & 0x0f; 223 rxbuf->idx = 0; 224 rxbuf->checksum = rx_data; 225 rxbuf->state = (rxbuf->len > 0 ) ? STATE_DATA : STATE_EOF; 226 break; 227 case STATE_DATA: 228 rxbuf->checksum += rx_data; 229 rxbuf->data[rxbuf->idx] = rx_data; 230 if (++rxbuf->idx == rxbuf->len) 231 rxbuf->state = STATE_EOF; 232 break; 233 case STATE_EOF: 234 rxbuf->state = STATE_SOF; 235 if (rx_data == FRAME_EOF || rx_data == rxbuf->checksum) 236 DPRINTF(("frame EOF\n")); 237 else 238 DPRINTF(("BadFrame\n")); 239 break; 240 default: 241 break; 242 } 243 } 244 } 245
Indexes created Mon Sep 22 13:09:51 GMT 2025