1 /* $NetBSD: ipaq_atmelgpio.c,v 1.19 2023/12/20 14:50:02 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 1.19 2023/12/20 14:50:02 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/bus.h> 47 48 #include <hpcarm/dev/ipaq_saipvar.h> 49 #include <hpcarm/dev/ipaq_gpioreg.h> 50 #include <hpcarm/dev/ipaq_atmel.h> 51 #include <hpcarm/dev/ipaq_atmelvar.h> 52 53 #include <arm/sa11x0/sa11x0_gpioreg.h> 54 #include <arm/sa11x0/sa11x0_comreg.h> 55 #include <arm/sa11x0/sa11x0_reg.h> 56 57 #ifdef ATMEL_DEBUG 58 #define DPRINTF(x) aprint_normal x 59 #else 60 #define DPRINTF(x) 61 #endif 62 63 static int atmelgpio_match(device_t, cfdata_t, void *); 64 static void atmelgpio_attach(device_t, device_t, void *); 65 static int atmelgpio_print(void *, const char *); 66 static int atmelgpio_search(device_t, cfdata_t, const int *, void *); 67 static void atmelgpio_init(struct atmelgpio_softc *); 68 69 static void rxtx_data(struct atmelgpio_softc *, int, int, 70 uint8_t *, struct atmel_rx *); 71 72 CFATTACH_DECL_NEW(atmelgpio, sizeof(struct atmelgpio_softc), 73 atmelgpio_match, atmelgpio_attach, NULL, NULL); 74 75 static int 76 atmelgpio_match(device_t parent, cfdata_t cf, void *aux) 77 { 78 return (1); 79 } 80 81 static void 82 atmelgpio_attach(device_t parent, device_t self, void *aux) 83 { 84 struct atmelgpio_softc *sc = device_private(self); 85 struct ipaq_softc *psc = device_private(parent); 86 87 struct atmel_rx rxbuf; 88 89 aprint_normal("\n"); 90 aprint_normal_dev(self, "Atmel microcontroller GPIO\n"); 91 92 sc->sc_iot = psc->sc_iot; 93 sc->sc_ioh = psc->sc_ioh; 94 sc->sc_parent = psc; 95 96 if (bus_space_map(sc->sc_iot, SACOM1_BASE, SACOM_NPORTS, 0, 97 &sc->sc_ioh)) { 98 aprint_normal_dev(self, "unable to map of UART1 registers\n"); 99 return; 100 } 101 102 atmelgpio_init(sc); 103 104 rxbuf.idx = 0; 105 rxbuf.len = 0; 106 107 #if 1 /* this is sample */ 108 rxtx_data(sc, STATUS_BATTERY, 0, NULL, &rxbuf); 109 110 aprint_normal("ac_status = %x\n", rxbuf.data[0]); 111 aprint_normal("Battery kind = %x\n", rxbuf.data[1]); 112 aprint_normal("Voltage = %d mV\n", 113 1000 * (rxbuf.data[3] << 8 | rxbuf.data[2]) /228); 114 aprint_normal("Battery Status = %x\n", rxbuf.data[4]); 115 aprint_normal("Battery percentage = %d\n", 116 425 * (rxbuf.data[3] << 8 | rxbuf.data[2]) /1000 - 298); 117 #endif 118 119 rxtx_data(sc, READ_IIC, 0, NULL, &rxbuf); 120 121 /* 122 * Attach each devices 123 */ 124 125 config_search(self, NULL, 126 CFARGS(.search = atmelgpio_search)); 127 } 128 129 static int 130 atmelgpio_search(device_t parent, cfdata_t cf, const int *ldesc, 131 void *aux) 132 { 133 if (config_probe(parent, cf, NULL)) 134 config_attach(parent, cf, NULL, atmelgpio_print, CFARGS_NONE); 135 return 0; 136 } 137 138 139 static int 140 atmelgpio_print(void *aux, const char *name) 141 { 142 return (UNCONF); 143 } 144 145 static void 146 atmelgpio_init(struct atmelgpio_softc *sc) 147 { 148 /* 8 bits no parity 1 stop bit */ 149 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR0, CR0_DSS); 150 151 /* Set baud rate 115k */ 152 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR1, 0); 153 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR2, SACOMSPEED(115200)); 154 155 /* RX/TX enable, RX/TX FIFO interrupt enable */ 156 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR3, 157 (CR3_RXE | CR3_TXE | CR3_RIE | CR3_TIE)); 158 } 159 160 static void 161 rxtx_data(struct atmelgpio_softc *sc, int id, int size, uint8_t *buf, 162 struct atmel_rx *rxbuf) 163 { 164 int i, checksum, length, rx_data; 165 uint8_t data[MAX_SENDSIZE]; 166 167 length = size + FRAME_OVERHEAD_SIZE; 168 169 while (! (bus_space_read_4(sc->sc_iot, sc->sc_ioh, SACOM_SR0) & SR0_TFS)) 170 ; 171 172 data[0] = (uint8_t)FRAME_SOF; 173 data[1] = (uint8_t)((id << 4) | size); 174 checksum = data[1]; 175 i = 2; 176 while (size--) { 177 data[i++] = *buf; 178 checksum += (uint8_t)(*buf++); 179 } 180 data[length-1] = checksum; 181 182 while (! (bus_space_read_4(sc->sc_iot, sc->sc_ioh, SACOM_SR1) & SR1_TNF)) 183 ; 184 i = 0; 185 while (i < length) 186 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_DR, data[i++]); 187 188 delay(10000); 189 #if 0 190 while (! (bus_space_read_4(sc->sc_iot, sc->sc_ioh, SACOM_SR0) & 191 (SR0_RID | SR0_RFS))) 192 #endif 193 rxbuf->state = STATE_SOF; 194 while (bus_space_read_4(sc->sc_iot, sc->sc_ioh, SACOM_SR1) & SR1_RNE) { 195 196 rx_data = bus_space_read_4(sc->sc_iot, sc->sc_ioh, SACOM_DR); 197 DPRINTF(("DATA = %x\n", rx_data)); 198 199 switch (rxbuf->state) { 200 case STATE_SOF: 201 if (rx_data == FRAME_SOF) 202 rxbuf->state = STATE_ID; 203 break; 204 case STATE_ID: 205 rxbuf->id = (rx_data & 0xf0) >> 4; 206 rxbuf->len = rx_data & 0x0f; 207 rxbuf->idx = 0; 208 rxbuf->checksum = rx_data; 209 rxbuf->state = (rxbuf->len > 0 ) ? STATE_DATA : STATE_EOF; 210 break; 211 case STATE_DATA: 212 rxbuf->checksum += rx_data; 213 rxbuf->data[rxbuf->idx] = rx_data; 214 if (++rxbuf->idx == rxbuf->len) 215 rxbuf->state = STATE_EOF; 216 break; 217 case STATE_EOF: 218 rxbuf->state = STATE_SOF; 219 if (rx_data == FRAME_EOF || rx_data == rxbuf->checksum) 220 DPRINTF(("frame EOF\n")); 221 else 222 DPRINTF(("BadFrame\n")); 223 break; 224 default: 225 break; 226 } 227 } 228 } 229
Indexes created Sat Sep 20 22:09:52 GMT 2025