ipaq_atmelgpio.c revision 1.16.68.1
1 /* $NetBSD: ipaq_atmelgpio.c,v 1.16.68.1 2021/03/20 19:33:35 thorpej 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 * 18 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 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 THE FOUNDATION OR CONTRIBUTORS 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 * iPAQ uses Atmel microcontroller to service a few of peripheral devices. 32 * This controller connect to UART1 of SA11x0. 33 */ 34 35 #include <sys/cdefs.h> 36 __KERNEL_RCSID(0, "$NetBSD: ipaq_atmelgpio.c,v 1.16.68.1 2021/03/20 19:33:35 thorpej Exp $"); 37 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #include <sys/types.h> 41 #include <sys/conf.h> 42 #include <sys/file.h> 43 #include <sys/device.h> 44 #include <sys/kernel.h> 45 #include <sys/kthread.h> 46 #include <sys/malloc.h> 47 #include <sys/bus.h> 48 49 #include <hpcarm/dev/ipaq_saipvar.h> 50 #include <hpcarm/dev/ipaq_gpioreg.h> 51 #include <hpcarm/dev/ipaq_atmel.h> 52 #include <hpcarm/dev/ipaq_atmelvar.h> 53 54 #include <arm/sa11x0/sa11x0_gpioreg.h> 55 #include <arm/sa11x0/sa11x0_comreg.h> 56 #include <arm/sa11x0/sa11x0_reg.h> 57 58 #ifdef ATMEL_DEBUG 59 #define DPRINTF(x) aprint_normal x 60 #else 61 #define DPRINTF(x) 62 #endif 63 64 static int atmelgpio_match(device_t, cfdata_t, void *); 65 static void atmelgpio_attach(device_t, device_t, void *); 66 static int atmelgpio_print(void *, const char *); 67 static int atmelgpio_search(device_t, cfdata_t, const int *, void *); 68 static void atmelgpio_init(struct atmelgpio_softc *); 69 70 static void rxtx_data(struct atmelgpio_softc *, int, int, 71 uint8_t *, struct atmel_rx *); 72 73 CFATTACH_DECL_NEW(atmelgpio, sizeof(struct atmelgpio_softc), 74 atmelgpio_match, atmelgpio_attach, NULL, NULL); 75 76 static int 77 atmelgpio_match(device_t parent, cfdata_t cf, void *aux) 78 { 79 return (1); 80 } 81 82 static void 83 atmelgpio_attach(device_t parent, device_t self, void *aux) 84 { 85 struct atmelgpio_softc *sc = device_private(self); 86 struct ipaq_softc *psc = device_private(parent); 87 88 struct atmel_rx rxbuf; 89 90 aprint_normal("\n"); 91 aprint_normal_dev(self, "Atmel microcontroller GPIO\n"); 92 93 sc->sc_iot = psc->sc_iot; 94 sc->sc_ioh = psc->sc_ioh; 95 sc->sc_parent = psc; 96 97 if (bus_space_map(sc->sc_iot, SACOM1_BASE, SACOM_NPORTS, 0, 98 &sc->sc_ioh)) { 99 aprint_normal_dev(self, "unable to map of UART1 registers\n"); 100 return; 101 } 102 103 atmelgpio_init(sc); 104 105 rxbuf.idx = 0; 106 rxbuf.len = 0; 107 108 #if 1 /* this is sample */ 109 rxtx_data(sc, STATUS_BATTERY, 0, NULL, &rxbuf); 110 111 aprint_normal("ac_status = %x\n", rxbuf.data[0]); 112 aprint_normal("Battery kind = %x\n", rxbuf.data[1]); 113 aprint_normal("Voltage = %d mV\n", 114 1000 * (rxbuf.data[3] << 8 | rxbuf.data[2]) /228); 115 aprint_normal("Battery Status = %x\n", rxbuf.data[4]); 116 aprint_normal("Battery percentage = %d\n", 117 425 * (rxbuf.data[3] << 8 | rxbuf.data[2]) /1000 - 298); 118 #endif 119 120 rxtx_data(sc, READ_IIC, 0, NULL, &rxbuf); 121 122 /* 123 * Attach each devices 124 */ 125 126 config_search(self, NULL, 127 CFARG_SUBMATCH, atmelgpio_search, 128 CFARG_IATTR, "atmelgpioif", 129 CFARG_EOL); 130 } 131 132 static int 133 atmelgpio_search(device_t parent, cfdata_t cf, const int *ldesc, 134 void *aux) 135 { 136 if (config_match(parent, cf, NULL) > 0) 137 config_attach(parent, cf, NULL, atmelgpio_print); 138 return 0; 139 } 140 141 142 static int 143 atmelgpio_print(void *aux, const char *name) 144 { 145 return (UNCONF); 146 } 147 148 static void 149 atmelgpio_init(struct atmelgpio_softc *sc) 150 { 151 /* 8 bits no parity 1 stop bit */ 152 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR0, CR0_DSS); 153 154 /* Set baud rate 115k */ 155 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR1, 0); 156 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR2, SACOMSPEED(115200)); 157 158 /* RX/TX enable, RX/TX FIFO interrupt enable */ 159 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR3, 160 (CR3_RXE | CR3_TXE | CR3_RIE | CR3_TIE)); 161 } 162 163 static void 164 rxtx_data(struct atmelgpio_softc *sc, int id, int size, uint8_t *buf, 165 struct atmel_rx *rxbuf) 166 { 167 int i, checksum, length, rx_data; 168 uint8_t data[MAX_SENDSIZE]; 169 170 length = size + FRAME_OVERHEAD_SIZE; 171 172 while (! (bus_space_read_4(sc->sc_iot, sc->sc_ioh, SACOM_SR0) & SR0_TFS)) 173 ; 174 175 data[0] = (uint8_t)FRAME_SOF; 176 data[1] = (uint8_t)((id << 4) | size); 177 checksum = data[1]; 178 i = 2; 179 while (size--) { 180 data[i++] = *buf; 181 checksum += (uint8_t)(*buf++); 182 } 183 data[length-1] = checksum; 184 185 while (! (bus_space_read_4(sc->sc_iot, sc->sc_ioh, SACOM_SR1) & SR1_TNF)) 186 ; 187 i = 0; 188 while (i < length) 189 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_DR, data[i++]); 190 191 delay(10000); 192 #if 0 193 while (! (bus_space_read_4(sc->sc_iot, sc->sc_ioh, SACOM_SR0) & 194 (SR0_RID | SR0_RFS))) 195 #endif 196 rxbuf->state = STATE_SOF; 197 while (bus_space_read_4(sc->sc_iot, sc->sc_ioh, SACOM_SR1) & SR1_RNE) { 198 199 rx_data = bus_space_read_4(sc->sc_iot, sc->sc_ioh, SACOM_DR); 200 DPRINTF(("DATA = %x\n", rx_data)); 201 202 switch (rxbuf->state) { 203 case STATE_SOF: 204 if (rx_data == FRAME_SOF) 205 rxbuf->state = STATE_ID; 206 break; 207 case STATE_ID: 208 rxbuf->id = (rx_data & 0xf0) >> 4; 209 rxbuf->len = rx_data & 0x0f; 210 rxbuf->idx = 0; 211 rxbuf->checksum = rx_data; 212 rxbuf->state = (rxbuf->len > 0 ) ? STATE_DATA : STATE_EOF; 213 break; 214 case STATE_DATA: 215 rxbuf->checksum += rx_data; 216 rxbuf->data[rxbuf->idx] = rx_data; 217 if (++rxbuf->idx == rxbuf->len) 218 rxbuf->state = STATE_EOF; 219 break; 220 case STATE_EOF: 221 rxbuf->state = STATE_SOF; 222 if (rx_data == FRAME_EOF || rx_data == rxbuf->checksum) 223 DPRINTF(("frame EOF\n")); 224 else 225 DPRINTF(("BadFrame\n")); 226 break; 227 default: 228 break; 229 } 230 } 231 } 232
Indexes created Tue Sep 30 07:10:03 GMT 2025