1 /* $NetBSD: ipaq_atmelgpio.c,v 1.15 2009/05/29 14:15:44 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@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 1.15 2009/05/29 14:15:44 rjs 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 48 #include <machine/bus.h> 49 50 #include <hpcarm/dev/ipaq_saipvar.h> 51 #include <hpcarm/dev/ipaq_gpioreg.h> 52 #include <hpcarm/dev/ipaq_atmel.h> 53 #include <hpcarm/dev/ipaq_atmelvar.h> 54 55 #include <arm/sa11x0/sa11x0_gpioreg.h> 56 #include <arm/sa11x0/sa11x0_comreg.h> 57 #include <arm/sa11x0/sa11x0_reg.h> 58 59 #ifdef ATMEL_DEBUG 60 #define DPRINTF(x) aprint_normal x 61 #else 62 #define DPRINTF(x) 63 #endif 64 65 static int atmelgpio_match(device_t, cfdata_t, void *); 66 static void atmelgpio_attach(device_t, device_t, void *); 67 static int atmelgpio_print(void *, const char *); 68 static int atmelgpio_search(device_t, cfdata_t, const int *, void *); 69 static void atmelgpio_init(struct atmelgpio_softc *); 70 71 static void rxtx_data(struct atmelgpio_softc *, int, int, 72 uint8_t *, struct atmel_rx *); 73 74 CFATTACH_DECL_NEW(atmelgpio, sizeof(struct atmelgpio_softc), 75 atmelgpio_match, atmelgpio_attach, NULL, NULL); 76 77 static int 78 atmelgpio_match(device_t parent, cfdata_t cf, void *aux) 79 { 80 return (1); 81 } 82 83 static void 84 atmelgpio_attach(device_t parent, device_t self, void *aux) 85 { 86 struct atmelgpio_softc *sc = device_private(self); 87 struct ipaq_softc *psc = device_private(parent); 88 89 struct atmel_rx rxbuf; 90 91 aprint_normal("\n"); 92 aprint_normal_dev(self, "Atmel microcontroller GPIO\n"); 93 94 sc->sc_iot = psc->sc_iot; 95 sc->sc_ioh = psc->sc_ioh; 96 sc->sc_parent = psc; 97 98 if (bus_space_map(sc->sc_iot, SACOM1_BASE, SACOM_NPORTS, 0, 99 &sc->sc_ioh)) { 100 aprint_normal_dev(self, "unable to map of UART1 registers\n"); 101 return; 102 } 103 104 atmelgpio_init(sc); 105 106 rxbuf.idx = 0; 107 rxbuf.len = 0; 108 109 #if 1 /* this is sample */ 110 rxtx_data(sc, STATUS_BATTERY, 0, NULL, &rxbuf); 111 112 aprint_normal("ac_status = %x\n", rxbuf.data[0]); 113 aprint_normal("Battery kind = %x\n", rxbuf.data[1]); 114 aprint_normal("Voltage = %d mV\n", 115 1000 * (rxbuf.data[3] << 8 | rxbuf.data[2]) /228); 116 aprint_normal("Battery Status = %x\n", rxbuf.data[4]); 117 aprint_normal("Battery percentage = %d\n", 118 425 * (rxbuf.data[3] << 8 | rxbuf.data[2]) /1000 - 298); 119 #endif 120 121 rxtx_data(sc, READ_IIC, 0, NULL, &rxbuf); 122 123 /* 124 * Attach each devices 125 */ 126 127 config_search_ia(atmelgpio_search, self, "atmelgpioif", NULL); 128 } 129 130 static int 131 atmelgpio_search(device_t parent, cfdata_t cf, const int *ldesc, 132 void *aux) 133 { 134 if (config_match(parent, cf, NULL) > 0) 135 config_attach(parent, cf, NULL, atmelgpio_print); 136 return 0; 137 } 138 139 140 static int 141 atmelgpio_print(void *aux, const char *name) 142 { 143 return (UNCONF); 144 } 145 146 static void 147 atmelgpio_init(struct atmelgpio_softc *sc) 148 { 149 /* 8 bits no parity 1 stop bit */ 150 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR0, CR0_DSS); 151 152 /* Set baud rate 115k */ 153 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR1, 0); 154 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR2, SACOMSPEED(115200)); 155 156 /* RX/TX enable, RX/TX FIFO interrupt enable */ 157 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR3, 158 (CR3_RXE | CR3_TXE | CR3_RIE | CR3_TIE)); 159 } 160 161 static void 162 rxtx_data(struct atmelgpio_softc *sc, int id, int size, uint8_t *buf, 163 struct atmel_rx *rxbuf) 164 { 165 int i, checksum, length, rx_data; 166 uint8_t data[MAX_SENDSIZE]; 167 168 length = size + FRAME_OVERHEAD_SIZE; 169 170 while (! (bus_space_read_4(sc->sc_iot, sc->sc_ioh, SACOM_SR0) & SR0_TFS)) 171 ; 172 173 data[0] = (uint8_t)FRAME_SOF; 174 data[1] = (uint8_t)((id << 4) | size); 175 checksum = data[1]; 176 i = 2; 177 while (size--) { 178 data[i++] = *buf; 179 checksum += (uint8_t)(*buf++); 180 } 181 data[length-1] = checksum; 182 183 while (! (bus_space_read_4(sc->sc_iot, sc->sc_ioh, SACOM_SR1) & SR1_TNF)) 184 ; 185 i = 0; 186 while (i < length) 187 bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_DR, data[i++]); 188 189 delay(10000); 190 #if 0 191 while (! (bus_space_read_4(sc->sc_iot, sc->sc_ioh, SACOM_SR0) & 192 (SR0_RID | SR0_RFS))) 193 #endif 194 rxbuf->state = STATE_SOF; 195 while (bus_space_read_4(sc->sc_iot, sc->sc_ioh, SACOM_SR1) & SR1_RNE) { 196 197 rx_data = bus_space_read_4(sc->sc_iot, sc->sc_ioh, SACOM_DR); 198 DPRINTF(("DATA = %x\n", rx_data)); 199 200 switch (rxbuf->state) { 201 case STATE_SOF: 202 if (rx_data == FRAME_SOF) 203 rxbuf->state = STATE_ID; 204 break; 205 case STATE_ID: 206 rxbuf->id = (rx_data & 0xf0) >> 4; 207 rxbuf->len = rx_data & 0x0f; 208 rxbuf->idx = 0; 209 rxbuf->checksum = rx_data; 210 rxbuf->state = (rxbuf->len > 0 ) ? STATE_DATA : STATE_EOF; 211 break; 212 case STATE_DATA: 213 rxbuf->checksum += rx_data; 214 rxbuf->data[rxbuf->idx] = rx_data; 215 if (++rxbuf->idx == rxbuf->len) 216 rxbuf->state = STATE_EOF; 217 break; 218 case STATE_EOF: 219 rxbuf->state = STATE_SOF; 220 if (rx_data == FRAME_EOF || rx_data == rxbuf->checksum) 221 DPRINTF(("frame EOF\n")); 222 else 223 DPRINTF(("BadFrame\n")); 224 break; 225 default: 226 break; 227 } 228 } 229 } 230