axp809.c revision 1.2
1 /* $NetBSD: axp809.c,v 1.2 2018/06/16 21:22:13 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 2014 Jared D. McNeill <jmcneill (at) invisible.ca> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #define AXP_DEBUG 30 31 #include <sys/cdefs.h> 32 __KERNEL_RCSID(0, "$NetBSD: axp809.c,v 1.2 2018/06/16 21:22:13 thorpej Exp $"); 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/kernel.h> 37 #include <sys/device.h> 38 #include <sys/conf.h> 39 #include <sys/bus.h> 40 #include <sys/kmem.h> 41 42 #include <dev/i2c/i2cvar.h> 43 #include <dev/i2c/axp809.h> 44 45 #define AXP_GPIO1_CTRL_REG 0x92 46 #define AXP_GPIO1LDO_CTRL_REG 0x93 47 48 struct axp809_ctrl { 49 device_t c_dev; 50 51 const char * c_name; 52 u_int c_min; 53 u_int c_max; 54 u_int c_step1; 55 u_int c_step1cnt; 56 u_int c_step2; 57 u_int c_step2cnt; 58 59 uint8_t c_enable_reg; 60 uint8_t c_enable_mask; 61 62 uint8_t c_voltage_reg; 63 uint8_t c_voltage_mask; 64 }; 65 66 #define AXP_CTRL(name, min, max, step, ereg, emask, vreg, vmask) \ 67 { .c_name = (name), .c_min = (min), .c_max = (max), \ 68 .c_step1 = (step), .c_step1cnt = (((max) - (min)) / (step)) + 1, \ 69 .c_step2 = 0, .c_step2cnt = 0, \ 70 .c_enable_reg = AXP_##ereg##_REG, .c_enable_mask = (emask), \ 71 .c_voltage_reg = AXP_##vreg##_REG, .c_voltage_mask = (vmask) } 72 73 #define AXP_CTRL2(name, min, max, step1, step1cnt, step2, step2cnt, ereg, emask, vreg, vmask) \ 74 { .c_name = (name), .c_min = (min), .c_max = (max), \ 75 .c_step1 = (step1), .c_step1cnt = (step1cnt), \ 76 .c_step2 = (step2), .c_step2cnt = (step2cnt), \ 77 .c_enable_reg = AXP_##ereg##_REG, .c_enable_mask = (emask), \ 78 .c_voltage_reg = AXP_##vreg##_REG, .c_voltage_mask = (vmask) } 79 80 static const struct axp809_ctrl axp809_ctrls[] = { 81 AXP_CTRL("GPIO1", 700, 3300, 100, 82 GPIO1_CTRL, __BIT(0), GPIO1LDO_CTRL, __BITS(4,0)), 83 }; 84 85 struct axp809_softc { 86 device_t sc_dev; 87 i2c_tag_t sc_i2c; 88 i2c_addr_t sc_addr; 89 90 u_int sc_nctrl; 91 struct axp809_ctrl *sc_ctrl; 92 }; 93 94 static int axp809_match(device_t, cfdata_t, void *); 95 static void axp809_attach(device_t, device_t, void *); 96 97 static int axp809_read(struct axp809_softc *, uint8_t, uint8_t *); 98 static int axp809_write(struct axp809_softc *, uint8_t, uint8_t); 99 100 static void axp809_print(struct axp809_ctrl *c); 101 102 CFATTACH_DECL_NEW(axp809pm, sizeof(struct axp809_softc), 103 axp809_match, axp809_attach, NULL, NULL); 104 105 static int 106 axp809_match(device_t parent, cfdata_t match, void *aux) 107 { 108 struct i2c_attach_args *ia = aux; 109 int match_result; 110 111 if (iic_use_direct_match(ia, match, NULL, &match_result)) 112 return match_result; 113 114 /* This device is direct-config only. */ 115 116 return 0; 117 } 118 119 static void 120 axp809_attach(device_t parent, device_t self, void *aux) 121 { 122 struct axp809_softc *sc = device_private(self); 123 struct i2c_attach_args *ia = aux; 124 u_int n; 125 126 sc->sc_dev = self; 127 sc->sc_i2c = ia->ia_tag; 128 sc->sc_addr = ia->ia_addr; 129 130 aprint_naive("\n"); 131 aprint_normal("\n"); 132 133 sc->sc_nctrl = __arraycount(axp809_ctrls); 134 sc->sc_ctrl = kmem_alloc(sizeof(axp809_ctrls), KM_SLEEP); 135 memcpy(sc->sc_ctrl, axp809_ctrls, sizeof(axp809_ctrls)); 136 for (n = 0; n < sc->sc_nctrl; n++) { 137 sc->sc_ctrl[n].c_dev = self; 138 } 139 140 #ifdef AXP_DEBUG 141 for (n = 0; n < sc->sc_nctrl; n++) { 142 axp809_print(&sc->sc_ctrl[n]); 143 } 144 #endif 145 } 146 147 static int 148 axp809_read(struct axp809_softc *sc, uint8_t reg, uint8_t *val) 149 { 150 return iic_smbus_read_byte(sc->sc_i2c, sc->sc_addr, reg, val, 151 cold ? I2C_F_POLL : 0); 152 } 153 154 static int 155 axp809_write(struct axp809_softc *sc, uint8_t reg, uint8_t val) 156 { 157 return iic_smbus_write_byte(sc->sc_i2c, sc->sc_addr, reg, val, 158 cold ? I2C_F_POLL : 0); 159 } 160 161 static void 162 axp809_print(struct axp809_ctrl *c) 163 { 164 struct axp809_softc *sc = device_private(c->c_dev); 165 u_int voltage; 166 bool enabled; 167 168 device_printf(sc->sc_dev, "%s:", c->c_name); 169 if (c->c_voltage_reg) { 170 if (axp809_get_voltage(c, &voltage)) { 171 printf(" [??? V]"); 172 } else { 173 printf(" [%d.%03dV]", voltage / 1000, 174 voltage % 1000); 175 } 176 } 177 if (c->c_enable_reg) { 178 if (axp809_is_enabled(c, &enabled)) { 179 printf(" [unknown state]"); 180 } else { 181 printf(" [%s]", enabled ? "ON" : "OFF"); 182 } 183 } 184 printf("\n"); 185 } 186 187 struct axp809_ctrl * 188 axp809_lookup(device_t dev, const char *name) 189 { 190 struct axp809_softc *sc = device_private(dev); 191 struct axp809_ctrl *c; 192 u_int n; 193 194 for (n = 0; n < sc->sc_nctrl; n++) { 195 c = &sc->sc_ctrl[n]; 196 if (strcmp(c->c_name, name) == 0) { 197 return c; 198 } 199 } 200 201 return NULL; 202 } 203 204 int 205 axp809_set_voltage(struct axp809_ctrl *c, u_int min, u_int max) 206 { 207 struct axp809_softc *sc = device_private(c->c_dev); 208 u_int vol, reg_val; 209 int nstep, error; 210 uint8_t val; 211 212 if (!c->c_voltage_mask) 213 return EINVAL; 214 215 if (min < c->c_min || min > c->c_max) 216 return EINVAL; 217 218 reg_val = 0; 219 nstep = 1; 220 vol = c->c_min; 221 222 for (nstep = 0; nstep < c->c_step1cnt && vol < min; nstep++) { 223 ++reg_val; 224 vol += c->c_step1; 225 } 226 for (nstep = 0; nstep < c->c_step2cnt && vol < min; nstep++) { 227 ++reg_val; 228 vol += c->c_step2; 229 } 230 231 if (vol > max) 232 return EINVAL; 233 234 iic_acquire_bus(sc->sc_i2c, 0); 235 if ((error = axp809_read(sc, c->c_voltage_reg, &val)) != 0) 236 goto done; 237 val &= ~c->c_voltage_mask; 238 val |= __SHIFTIN(reg_val, c->c_voltage_mask); 239 error = axp809_write(sc, c->c_voltage_reg, val); 240 done: 241 iic_release_bus(sc->sc_i2c, 0); 242 #ifdef AXP_DEBUG 243 if (error == 0) 244 axp809_print(c); 245 #endif 246 247 return error; 248 } 249 250 int 251 axp809_get_voltage(struct axp809_ctrl *c, u_int *pvol) 252 { 253 struct axp809_softc *sc = device_private(c->c_dev); 254 int reg_val, error; 255 uint8_t val; 256 257 if (!c->c_voltage_mask) 258 return EINVAL; 259 260 iic_acquire_bus(sc->sc_i2c, 0); 261 error = axp809_read(sc, c->c_voltage_reg, &val); 262 iic_release_bus(sc->sc_i2c, 0); 263 if (error) 264 return error; 265 266 reg_val = __SHIFTOUT(val, c->c_voltage_mask); 267 if (reg_val < c->c_step1cnt) { 268 *pvol = c->c_min + reg_val * c->c_step1; 269 } else { 270 *pvol = c->c_min + (c->c_step1cnt * c->c_step1) + 271 ((reg_val - c->c_step1cnt) * c->c_step2); 272 } 273 274 return 0; 275 } 276 277 int 278 axp809_is_enabled(struct axp809_ctrl *c, bool *penabled) 279 { 280 struct axp809_softc *sc = device_private(c->c_dev); 281 uint8_t val; 282 int error; 283 284 if (!c->c_enable_mask) 285 return EINVAL; 286 287 iic_acquire_bus(sc->sc_i2c, 0); 288 error = axp809_read(sc, c->c_enable_reg, &val); 289 iic_release_bus(sc->sc_i2c, 0); 290 if (error) 291 return error; 292 293 *penabled = !!(val & c->c_enable_mask); 294 return 0; 295 } 296 297 int 298 axp809_enable(struct axp809_ctrl *c) 299 { 300 struct axp809_softc *sc = device_private(c->c_dev); 301 uint8_t val; 302 int error; 303 304 if (!c->c_enable_mask) 305 return EINVAL; 306 307 iic_acquire_bus(sc->sc_i2c, 0); 308 if ((error = axp809_read(sc, c->c_enable_reg, &val)) != 0) 309 goto done; 310 val |= c->c_enable_mask; 311 error = axp809_write(sc, c->c_enable_reg, val); 312 done: 313 iic_release_bus(sc->sc_i2c, 0); 314 #ifdef AXP_DEBUG 315 if (error == 0) 316 axp809_print(c); 317 #endif 318 319 return error; 320 } 321 322 int 323 axp809_disable(struct axp809_ctrl *c) 324 { 325 struct axp809_softc *sc = device_private(c->c_dev); 326 uint8_t val; 327 int error; 328 329 if (!c->c_enable_mask) 330 return EINVAL; 331 332 iic_acquire_bus(sc->sc_i2c, 0); 333 if ((error = axp809_read(sc, c->c_enable_reg, &val)) != 0) 334 goto done; 335 val &= ~c->c_enable_mask; 336 error = axp809_write(sc, c->c_enable_reg, val); 337 done: 338 iic_release_bus(sc->sc_i2c, 0); 339 #ifdef AXP_DEBUG 340 if (error == 0) 341 axp809_print(c); 342 #endif 343 344 return error; 345 } 346
Indexes created Fri Sep 26 08:10:20 GMT 2025