ipaq_atmelgpio.c revision 1.12
1 /* $NetBSD: ipaq_atmelgpio.c,v 1.12 2006/09/26 16:35:26 rjs 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 1.12 2006/09/26 16:35:26 rjs 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 62 #include <arm/sa11x0/sa11x0_gpioreg.h> 63 #include <arm/sa11x0/sa11x0_comreg.h> 64 #include <arm/sa11x0/sa11x0_reg.h> 65 66 #ifdef ATMEL_DEBUG 67 #define DPRINTF(x) printf x 68 #else 69 #define DPRINTF(x) 70 #endif 71 72 static int atmelgpio_match(struct device *, struct cfdata *, void *); 73 static void atmelgpio_attach(struct device *, struct device *, void *); 74 static int atmelgpio_print(void *, const char *); 75 static int atmelgpio_search(struct device *, struct cfdata *, 76 const int *, void *); 77 static void atmelgpio_init(struct atmelgpio_softc *); 78 79 static void rxtx_data(struct atmelgpio_softc *, int, int, 80 uint8_t *, struct atmel_rx *); 81 82 CFATTACH_DECL(atmelgpio, sizeof(struct atmelgpio_softc), 83 atmelgpio_match, atmelgpio_attach, NULL, NULL); 84 85 static int 86 atmelgpio_match(parent, cf, aux) 87 struct device *parent; 88 struct cfdata *cf; 89 void *aux; 90 { 91 return (1); 92 } 93 94 static void 95 atmelgpio_attach(parent, self, aux) 96 struct device *parent; 97 struct device *self; 98 void *aux; 99 { 100 struct atmelgpio_softc *sc = (struct atmelgpio_softc *)self; 101 struct ipaq_softc *psc = (struct ipaq_softc *)parent; 102 103 struct atmel_rx rxbuf; 104 105 printf("\n"); 106 printf("%s: Atmel microcontroller GPIO\n", sc->sc_dev.dv_xname); 107 108 sc->sc_iot = psc->sc_iot; 109 sc->sc_ioh = psc->sc_ioh; 110 sc->sc_parent = (struct ipaq_softc *)parent; 111 112 if (bus_space_map(sc->sc_iot, SACOM1_BASE, SACOM_NPORTS, 0, 113 &sc->sc_ioh)) { 114 printf("%s: unable to map of UART1 registers\n", sc->sc_dev.dv_xname); 115 return; 116 } 117 118 atmelgpio_init(sc); 119 120 rxbuf.idx = 0; 121 rxbuf.len = 0; 122 123 #if 1 /* this is sample */ 124 rxtx_data(sc, STATUS_BATTERY, 0, NULL, &rxbuf); 125 126 printf("ac_status = %x\n", rxbuf.data[0]); 127 printf("Battery kind = %x\n", rxbuf.data[1]); 128 printf("Voltage = %d mV\n", 129 1000 * (rxbuf.data[3] << 8 | rxbuf.data[2]) /228); 130 printf("Battery Status = %x\n", rxbuf.data[4]); 131 printf("Battery percentage = %d\n", 132 425 * (rxbuf.data[3] << 8 | rxbuf.data[2]) /1000 - 298); 133 #endif 134 135 /* 136 * Attach each devices 137 */ 138 139 config_search_ia(atmelgpio_search, self, "atmelgpioif", NULL); 140 } 141 142 static int 143 atmelgpio_search(parent, cf, ldesc, aux) 144 struct device *parent; 145 struct cfdata *cf; 146 const int *ldesc; 147 void *aux; 148 { 149 if (config_match(parent, cf, NULL) > 0) 150 config_attach(parent, cf, NULL, atmelgpio_print); 151 return 0; 152 } 153 154 155 static int 156 atmelgpio_print(aux, name) 157 void *aux; 158 const char *name; 159 { 160 return (UNCONF); 161 } 162 163 static void 164 atmelgpio_init(sc) 165 struct atmelgpio_softc *sc; 166 { 167 /* 8 bits no parity 1 stop bit */ 168 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR0, CR0_DSS); 169 170 /* Set baud rate 115k */ 171 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR1, 0); 172 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR2, SACOMSPEED(115200)); 173 174 /* RX/TX enable, RX/TX FIFO interrupt enable */ 175 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR3, 176 (CR3_RXE | CR3_TXE | CR3_RIE | CR3_TIE)); 177 } 178 179 static void 180 rxtx_data(sc, id, size, buf, rxbuf) 181 struct atmelgpio_softc *sc; 182 int id, size; 183 uint8_t *buf; 184 struct atmel_rx *rxbuf; 185 { 186 int i, checksum, length, rx_data; 187 uint8_t data[MAX_SENDSIZE]; 188 189 length = size + FRAME_OVERHEAD_SIZE; 190 191 while (! (bus_space_read_4(sc->sc_iot, sc->sc_ioh, SACOM_SR0) & SR0_TFS)) 192 ; 193 194 data[0] = (uint8_t)FRAME_SOF; 195 data[1] = (uint8_t)((id << 4) | size); 196 checksum = data[1]; 197 i = 2; 198 while (size--) { 199 data[i++] = *buf; 200 checksum += (uint8_t)(*buf++); 201 } 202 data[length-1] = checksum; 203 204 while (! (bus_space_read_4(sc->sc_iot, sc->sc_ioh, SACOM_SR1) & SR1_TNF)) 205 ; 206 i = 0; 207 while (i < length) 208 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_DR, data[i++]); 209 210 delay(10000); 211 #if 0 212 while (! (bus_space_read_4(sc->sc_iot, sc->sc_ioh, SACOM_SR0) & 213 (SR0_RID | SR0_RFS))) 214 #endif 215 rxbuf->state = STATE_SOF; 216 while (bus_space_read_4(sc->sc_iot, sc->sc_ioh, SACOM_SR1) & SR1_RNE) { 217 218 rx_data = bus_space_read_4(sc->sc_iot, sc->sc_ioh, SACOM_DR); 219 DPRINTF(("DATA = %x\n", rx_data)); 220 221 switch (rxbuf->state) { 222 case STATE_SOF: 223 if (rx_data == FRAME_SOF) 224 rxbuf->state = STATE_ID; 225 break; 226 case STATE_ID: 227 rxbuf->id = (rx_data & 0xf0) >> 4; 228 rxbuf->len = rx_data & 0x0f; 229 rxbuf->idx = 0; 230 rxbuf->checksum = rx_data; 231 rxbuf->state = (rxbuf->len > 0 ) ? STATE_DATA : STATE_EOF; 232 break; 233 case STATE_DATA: 234 rxbuf->checksum += rx_data; 235 rxbuf->data[rxbuf->idx] = rx_data; 236 if (++rxbuf->idx == rxbuf->len) 237 rxbuf->state = STATE_EOF; 238 break; 239 case STATE_EOF: 240 rxbuf->state = STATE_SOF; 241 if (rx_data == FRAME_EOF || rx_data == rxbuf->checksum) 242 DPRINTF(("frame EOF\n")); 243 else 244 DPRINTF(("BadFrame\n")); 245 break; 246 default: 247 break; 248 } 249 } 250 } 251
Indexes created Wed Sep 24 22:09:59 GMT 2025