r2025.c revision 1.6
1 /* $NetBSD: r2025.c,v 1.6 2009/12/12 14:44:10 tsutsui Exp $ */ 2 3 /*- 4 * Copyright (c) 2006 Shigeyuki Fukushima. 5 * All rights reserved. 6 * 7 * Written by Shigeyuki Fukushima. 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 15 * copyright notice, this list of conditions and the following 16 * disclaimer in the documentation and/or other materials provided 17 * with the distribution. 18 * 3. The name of the author may not be used to endorse or promote 19 * products derived from this software without specific prior 20 * written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 23 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 24 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 26 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE 28 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 30 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 31 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 32 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 __KERNEL_RCSID(0, "$NetBSD: r2025.c,v 1.6 2009/12/12 14:44:10 tsutsui Exp $"); 37 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #include <sys/device.h> 41 #include <sys/kernel.h> 42 #include <sys/fcntl.h> 43 #include <sys/uio.h> 44 #include <sys/conf.h> 45 #include <sys/event.h> 46 47 #include <dev/clock_subr.h> 48 49 #include <dev/i2c/i2cvar.h> 50 #include <dev/i2c/r2025reg.h> 51 52 struct r2025rtc_softc { 53 device_t sc_dev; 54 i2c_tag_t sc_tag; 55 int sc_address; 56 int sc_open; 57 struct todr_chip_handle sc_todr; 58 }; 59 60 static void r2025rtc_attach(device_t, device_t, void *); 61 static int r2025rtc_match(device_t, cfdata_t, void *); 62 63 CFATTACH_DECL_NEW(r2025rtc, sizeof(struct r2025rtc_softc), 64 r2025rtc_match, r2025rtc_attach, NULL, NULL); 65 66 static int r2025rtc_gettime(struct todr_chip_handle *, struct timeval *); 67 static int r2025rtc_settime(struct todr_chip_handle *, struct timeval *); 68 static int r2025rtc_reg_write(struct r2025rtc_softc *, int, uint8_t*, int); 69 static int r2025rtc_reg_read(struct r2025rtc_softc *, int, uint8_t*, int); 70 71 72 static int 73 r2025rtc_match(device_t parent, cfdata_t cf, void *arg) 74 { 75 struct i2c_attach_args *ia = arg; 76 77 /* match only R2025 RTC devices */ 78 if (ia->ia_addr == R2025_ADDR) 79 return 1; 80 81 return 0; 82 } 83 84 static void 85 r2025rtc_attach(device_t parent, device_t self, void *arg) 86 { 87 struct r2025rtc_softc *sc = device_private(self); 88 struct i2c_attach_args *ia = arg; 89 90 aprint_normal(": RICOH R2025S/D Real-time Clock\n"); 91 92 sc->sc_tag = ia->ia_tag; 93 sc->sc_address = ia->ia_addr; 94 sc->sc_dev = self; 95 sc->sc_open = 0; 96 sc->sc_todr.cookie = sc; 97 sc->sc_todr.todr_gettime = r2025rtc_gettime; 98 sc->sc_todr.todr_settime = r2025rtc_settime; 99 sc->sc_todr.todr_setwen = NULL; 100 101 todr_attach(&sc->sc_todr); 102 } 103 104 static int 105 r2025rtc_gettime(struct todr_chip_handle *ch, struct timeval *tv) 106 { 107 struct r2025rtc_softc *sc = ch->cookie; 108 struct clock_ymdhms dt; 109 uint8_t rctrl; 110 uint8_t bcd[R2025_CLK_SIZE]; 111 int hour; 112 113 memset(&dt, 0, sizeof(dt)); 114 115 if (r2025rtc_reg_read(sc, R2025_REG_CTRL1, &rctrl, 1) != 0) { 116 aprint_error_dev(sc->sc_dev, 117 "r2025rtc_gettime: failed to read registers.\n"); 118 return -1; 119 } 120 121 if (r2025rtc_reg_read(sc, R2025_REG_SEC, &bcd[0], R2025_CLK_SIZE) 122 != 0) { 123 aprint_error_dev(sc->sc_dev, 124 "r2025rtc_gettime: failed to read registers.\n"); 125 return -1; 126 } 127 128 dt.dt_sec = FROMBCD(bcd[R2025_REG_SEC] & R2025_REG_SEC_MASK); 129 dt.dt_min = FROMBCD(bcd[R2025_REG_MIN] & R2025_REG_MIN_MASK); 130 hour = FROMBCD(bcd[R2025_REG_HOUR] & R2025_REG_HOUR_MASK); 131 if (rctrl & R2025_REG_CTRL1_H1224) { 132 dt.dt_hour = hour; 133 } else { 134 if (hour == 12) { 135 dt.dt_hour = 0; 136 } else if (hour == 32) { 137 dt.dt_hour = 12; 138 } else if (hour > 13) { 139 dt.dt_hour = (hour - 8); 140 } else { /* (hour < 12) */ 141 dt.dt_hour = hour; 142 } 143 } 144 dt.dt_wday = FROMBCD(bcd[R2025_REG_WDAY] & R2025_REG_WDAY_MASK); 145 dt.dt_day = FROMBCD(bcd[R2025_REG_DAY] & R2025_REG_DAY_MASK); 146 dt.dt_mon = FROMBCD(bcd[R2025_REG_MON] & R2025_REG_MON_MASK); 147 dt.dt_year = FROMBCD(bcd[R2025_REG_YEAR] & R2025_REG_YEAR_MASK) 148 + ((bcd[R2025_REG_MON] & R2025_REG_MON_Y1920) ? 2000 : 1900); 149 150 tv->tv_sec = clock_ymdhms_to_secs(&dt); 151 tv->tv_usec = 0; 152 153 return 0; 154 } 155 156 static int 157 r2025rtc_settime(struct todr_chip_handle *ch, struct timeval *tv) 158 { 159 struct r2025rtc_softc *sc = ch->cookie; 160 struct clock_ymdhms dt; 161 uint8_t rctrl; 162 uint8_t bcd[R2025_CLK_SIZE]; 163 164 clock_secs_to_ymdhms(tv->tv_sec, &dt); 165 166 /* Y3K problem */ 167 if (dt.dt_year >= 3000) { 168 aprint_error_dev(sc->sc_dev, 169 "r2025rtc_settime: " 170 "RTC does not support year 3000 or over.\n"); 171 return -1; 172 } 173 174 if (r2025rtc_reg_read(sc, R2025_REG_CTRL1, &rctrl, 1) != 0) { 175 aprint_error_dev(sc->sc_dev, 176 "r2025rtc_settime: failed to read register.\n"); 177 return -1; 178 } 179 rctrl |= R2025_REG_CTRL1_H1224; 180 181 /* setup registers 0x00-0x06 (7 byte) */ 182 bcd[R2025_REG_SEC] = TOBCD(dt.dt_sec) & R2025_REG_SEC_MASK; 183 bcd[R2025_REG_MIN] = TOBCD(dt.dt_min) & R2025_REG_MIN_MASK; 184 bcd[R2025_REG_HOUR] = TOBCD(dt.dt_hour) & R2025_REG_HOUR_MASK; 185 bcd[R2025_REG_WDAY] = TOBCD(dt.dt_wday) & R2025_REG_WDAY_MASK; 186 bcd[R2025_REG_DAY] = TOBCD(dt.dt_day) & R2025_REG_DAY_MASK; 187 bcd[R2025_REG_MON] = (TOBCD(dt.dt_mon) & R2025_REG_MON_MASK) 188 | ((dt.dt_year >= 2000) ? R2025_REG_MON_Y1920 : 0); 189 bcd[R2025_REG_YEAR] = TOBCD(dt.dt_year % 100) & R2025_REG_YEAR_MASK; 190 191 /* Write RTC register */ 192 if (r2025rtc_reg_write(sc, R2025_REG_CTRL1, &rctrl, 1) != 0) { 193 aprint_error_dev(sc->sc_dev, 194 "r2025rtc_settime: failed to write registers.\n"); 195 return -1; 196 } 197 if (r2025rtc_reg_write(sc, R2025_REG_SEC, bcd, R2025_CLK_SIZE) != 0) { 198 aprint_error_dev(sc->sc_dev, 199 "r2025rtc_settime: failed to write registers.\n"); 200 return -1; 201 } 202 203 return 0; 204 } 205 206 static int 207 r2025rtc_reg_write(struct r2025rtc_softc *sc, int reg, uint8_t *val, int len) 208 { 209 int i; 210 uint8_t buf[1]; 211 uint8_t cmdbuf[1]; 212 213 if (iic_acquire_bus(sc->sc_tag, I2C_F_POLL)) { 214 aprint_error_dev(sc->sc_dev, 215 "r2025rtc_clock_write: failed to acquire I2C bus\n"); 216 return -1; 217 } 218 219 for (i = 0 ; i < len ; i++) { 220 cmdbuf[0] = (((reg + i) << 4) & 0xf0); 221 buf[0] = val[i]; 222 if (iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP, sc->sc_address, 223 cmdbuf, 1, buf, 1, I2C_F_POLL)) { 224 iic_release_bus(sc->sc_tag, I2C_F_POLL); 225 aprint_error_dev(sc->sc_dev, "r2025rtc_reg_write: " 226 "failed to write registers\n"); 227 return -1; 228 } 229 } 230 231 iic_release_bus(sc->sc_tag, I2C_F_POLL); 232 233 return 0; 234 } 235 236 static int 237 r2025rtc_reg_read(struct r2025rtc_softc *sc, int reg, uint8_t *val, int len) 238 { 239 int i; 240 uint8_t buf[1]; 241 uint8_t cmdbuf[1]; 242 243 if (iic_acquire_bus(sc->sc_tag, I2C_F_POLL)) { 244 aprint_error_dev(sc->sc_dev, 245 "r2025rtc_clock_read: failed to acquire I2C bus\n"); 246 return -1; 247 } 248 249 for (i = 0 ; i < len ; i++) { 250 cmdbuf[0] = (((reg + i) << 4) & 0xf0); 251 buf[0] = 0; 252 if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, sc->sc_address, 253 cmdbuf, 1, buf, 1, I2C_F_POLL)) { 254 iic_release_bus(sc->sc_tag, I2C_F_POLL); 255 aprint_error_dev(sc->sc_dev, "r2025rtc_reg_read: " 256 "failed to write registers\n"); 257 return -1; 258 } 259 260 *(val + i) = buf[0]; 261 } 262 263 iic_release_bus(sc->sc_tag, I2C_F_POLL); 264 265 return 0; 266 } 267
Indexes created Wed Oct 15 16:09:53 GMT 2025