1 /* $NetBSD: voyager.c,v 1.14 2019/04/21 11:45:08 maya Exp $ */ 2 3 /* 4 * Copyright (c) 2009, 2011 Michael Lorenz 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 AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 __KERNEL_RCSID(0, "$NetBSD: voyager.c,v 1.14 2019/04/21 11:45:08 maya Exp $"); 30 31 #include <sys/param.h> 32 #include <sys/systm.h> 33 #include <sys/kernel.h> 34 #include <sys/device.h> 35 #include <sys/malloc.h> 36 #include <sys/lwp.h> 37 #include <sys/kauth.h> 38 39 #include <dev/pci/pcivar.h> 40 #include <dev/pci/pcireg.h> 41 #include <dev/pci/pcidevs.h> 42 #include <dev/pci/pciio.h> 43 #include <dev/ic/sm502reg.h> 44 #include <dev/i2c/i2cvar.h> 45 #include <dev/i2c/i2c_bitbang.h> 46 47 #include <sys/evcnt.h> 48 #include <sys/bitops.h> 49 50 #include <dev/pci/voyagervar.h> 51 52 #include "opt_voyager.h" 53 #include "voyagerfb.h" 54 #include "pwmclock.h" 55 56 #ifdef VOYAGER_DEBUG 57 #define DPRINTF aprint_normal 58 #else 59 #define DPRINTF while (0) printf 60 #endif 61 62 /* interrupt stuff */ 63 struct voyager_intr { 64 int (*vih_func)(void *); 65 void *vih_arg; 66 struct evcnt vih_count; 67 char vih_name[32]; 68 }; 69 70 struct voyager_softc { 71 device_t sc_dev; 72 73 pci_chipset_tag_t sc_pc; 74 pcitag_t sc_pcitag; 75 76 bus_space_tag_t sc_memt; 77 bus_space_tag_t sc_iot; 78 79 bus_space_handle_t sc_fbh, sc_regh; 80 bus_addr_t sc_fb, sc_reg; 81 bus_size_t sc_fbsize, sc_regsize; 82 83 struct i2c_controller sc_i2c; 84 kmutex_t sc_i2c_lock; 85 86 /* interrupt dispatcher */ 87 void *sc_ih; 88 struct voyager_intr sc_intrs[32]; 89 }; 90 91 void *voyager_cookie = NULL; 92 93 static int voyager_match(device_t, cfdata_t, void *); 94 static void voyager_attach(device_t, device_t, void *); 95 static int voyager_print(void *, const char *); 96 static int voyager_intr(void *); 97 98 CFATTACH_DECL_NEW(voyager, sizeof(struct voyager_softc), 99 voyager_match, voyager_attach, NULL, NULL); 100 101 /* I2C glue */ 102 static int voyager_i2c_acquire_bus(void *, int); 103 static void voyager_i2c_release_bus(void *, int); 104 static int voyager_i2c_send_start(void *, int); 105 static int voyager_i2c_send_stop(void *, int); 106 static int voyager_i2c_initiate_xfer(void *, i2c_addr_t, int); 107 static int voyager_i2c_read_byte(void *, uint8_t *, int); 108 static int voyager_i2c_write_byte(void *, uint8_t, int); 109 110 /* I2C bitbang glue */ 111 static void voyager_i2cbb_set_bits(void *, uint32_t); 112 static void voyager_i2cbb_set_dir(void *, uint32_t); 113 static uint32_t voyager_i2cbb_read(void *); 114 115 static const struct i2c_bitbang_ops voyager_i2cbb_ops = { 116 voyager_i2cbb_set_bits, 117 voyager_i2cbb_set_dir, 118 voyager_i2cbb_read, 119 { 120 1 << 13, 121 1 << 6, 122 1 << 13, 123 0 124 } 125 }; 126 #define GPIO_I2C_BITS ((1 << 6) | (1 << 13)) 127 128 #ifdef VOYAGER_DEBUG 129 static void voyager_print_pwm(struct voyager_softc *, int); 130 #endif 131 132 static int 133 voyager_match(device_t parent, cfdata_t match, void *aux) 134 { 135 struct pci_attach_args *pa = (struct pci_attach_args *)aux; 136 137 if (PCI_CLASS(pa->pa_class) != PCI_CLASS_DISPLAY) 138 return 0; 139 if (PCI_VENDOR(pa->pa_id) != PCI_VENDOR_SILMOTION) 140 return 0; 141 142 /* only chip tested on so far - may need a list */ 143 if (PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_SILMOTION_SM502) 144 return 100; 145 return (0); 146 } 147 148 static void 149 voyager_attach(device_t parent, device_t self, void *aux) 150 { 151 struct voyager_softc *sc = device_private(self); 152 struct pci_attach_args *pa = aux; 153 pci_intr_handle_t ih; 154 struct voyager_attach_args vaa; 155 struct i2cbus_attach_args iba; 156 uint32_t reg; 157 const char *intrstr; 158 int i; 159 char intrbuf[PCI_INTRSTR_LEN]; 160 161 sc->sc_pc = pa->pa_pc; 162 sc->sc_pcitag = pa->pa_tag; 163 sc->sc_memt = pa->pa_memt; 164 sc->sc_iot = pa->pa_iot; 165 sc->sc_dev = self; 166 167 voyager_cookie = sc; 168 169 pci_aprint_devinfo(pa, NULL); 170 171 if (pci_mapreg_map(pa, 0x14, PCI_MAPREG_TYPE_MEM, 0, 172 &sc->sc_memt, &sc->sc_regh, &sc->sc_reg, &sc->sc_regsize)) { 173 aprint_error("%s: failed to map registers.\n", 174 device_xname(sc->sc_dev)); 175 } 176 177 if (pci_mapreg_map(pa, 0x10, PCI_MAPREG_TYPE_MEM, 178 BUS_SPACE_MAP_LINEAR, 179 &sc->sc_memt, &sc->sc_fbh, &sc->sc_fb, &sc->sc_fbsize)) { 180 aprint_error("%s: failed to map the frame buffer.\n", 181 device_xname(sc->sc_dev)); 182 } 183 184 /* disable all interrupts */ 185 bus_space_write_4(sc->sc_memt, sc->sc_regh, SM502_INTR_MASK, 0); 186 187 /* initialize handler list */ 188 for (i = 0; i < 32; i++) { 189 sc->sc_intrs[i].vih_func = NULL; 190 snprintf(sc->sc_intrs[i].vih_name, 32, "int %d", i); 191 evcnt_attach_dynamic(&sc->sc_intrs[i].vih_count, 192 EVCNT_TYPE_INTR, NULL, "voyager", sc->sc_intrs[i].vih_name); 193 } 194 195 /* Map and establish the interrupt. */ 196 if (pci_intr_map(pa, &ih)) { 197 aprint_error_dev(self, "couldn't map interrupt\n"); 198 return; 199 } 200 201 intrstr = pci_intr_string(sc->sc_pc, ih, intrbuf, sizeof(intrbuf)); 202 sc->sc_ih = pci_intr_establish_xname(sc->sc_pc, ih, IPL_VM, 203 voyager_intr, NULL, /* so we get the clock frame instead */ 204 device_xname(self)); 205 if (sc->sc_ih == NULL) { 206 aprint_error_dev(self, "couldn't establish interrupt"); 207 if (intrstr != NULL) 208 aprint_error(" at %s", intrstr); 209 aprint_error("\n"); 210 return; 211 } 212 aprint_normal_dev(self, "interrupting at %s\n", intrstr); 213 214 #ifdef VOYAGER_DEBUG 215 voyager_print_pwm(sc, SM502_PWM0); 216 voyager_print_pwm(sc, SM502_PWM1); 217 voyager_print_pwm(sc, SM502_PWM2); 218 #endif 219 220 /* attach the framebuffer driver */ 221 vaa.vaa_memh = sc->sc_fbh; 222 vaa.vaa_mem_pa = sc->sc_fb; 223 vaa.vaa_regh = sc->sc_regh; 224 vaa.vaa_reg_pa = sc->sc_reg; 225 vaa.vaa_tag = sc->sc_memt; 226 vaa.vaa_pc = sc->sc_pc; 227 vaa.vaa_pcitag = sc->sc_pcitag; 228 #if NVOYAGERFB > 0 229 strcpy(vaa.vaa_name, "voyagerfb"); 230 config_found_ia(sc->sc_dev, "voyagerbus", &vaa, voyager_print); 231 #endif 232 #if NPWMCLOCK > 0 233 strcpy(vaa.vaa_name, "pwmclock"); 234 config_found_ia(sc->sc_dev, "voyagerbus", &vaa, voyager_print); 235 #endif 236 #ifdef notyet 237 strcpy(vaa.vaa_name, "vac"); 238 config_found_ia(sc->sc_dev, "voyagerbus", &vaa, voyager_print); 239 #endif 240 /* we use this mutex whether there's an i2c bus or not */ 241 mutex_init(&sc->sc_i2c_lock, MUTEX_DEFAULT, IPL_NONE); 242 243 /* 244 * see if the i2c pins are configured as gpio and if so, use them 245 * should probably be a compile time option 246 */ 247 reg = bus_space_read_4(sc->sc_memt, sc->sc_regh, SM502_GPIO0_CONTROL); 248 if ((reg & GPIO_I2C_BITS) == 0) { 249 /* both bits as outputs */ 250 voyager_gpio_dir(sc, 0xffffffff, GPIO_I2C_BITS); 251 252 /* Fill in the i2c tag */ 253 memset(&sc->sc_i2c, 0, sizeof(sc->sc_i2c)); 254 memset(&iba, 0, sizeof(iba)); 255 sc->sc_i2c.ic_cookie = sc; 256 sc->sc_i2c.ic_acquire_bus = voyager_i2c_acquire_bus; 257 sc->sc_i2c.ic_release_bus = voyager_i2c_release_bus; 258 sc->sc_i2c.ic_send_start = voyager_i2c_send_start; 259 sc->sc_i2c.ic_send_stop = voyager_i2c_send_stop; 260 sc->sc_i2c.ic_initiate_xfer = voyager_i2c_initiate_xfer; 261 sc->sc_i2c.ic_read_byte = voyager_i2c_read_byte; 262 sc->sc_i2c.ic_write_byte = voyager_i2c_write_byte; 263 sc->sc_i2c.ic_exec = NULL; 264 iba.iba_tag = &sc->sc_i2c; 265 config_found_ia(self, "i2cbus", &iba, iicbus_print); 266 } 267 voyager_control_gpio(sc, ~(1 << 16), 0); 268 voyager_gpio_dir(sc, 0xffffffff, 1 << 16); 269 voyager_write_gpio(sc, 0xffffffff, 1 << 16); 270 } 271 272 static int 273 voyager_print(void *aux, const char *what) 274 { 275 /*struct voyager_attach_args *vaa = aux;*/ 276 277 if (what == NULL) 278 return 0; 279 280 printf("%s:", what); 281 282 return 0; 283 } 284 285 static void 286 voyager_i2cbb_set_bits(void *cookie, uint32_t bits) 287 { 288 struct voyager_softc *sc = cookie; 289 uint32_t reg; 290 291 reg = bus_space_read_4(sc->sc_memt, sc->sc_regh, SM502_GPIO_DATA0); 292 reg &= ~GPIO_I2C_BITS; 293 reg |= bits; 294 bus_space_write_4(sc->sc_memt, sc->sc_regh, SM502_GPIO_DATA0, reg); 295 } 296 297 static void 298 voyager_i2cbb_set_dir(void *cookie, uint32_t bits) 299 { 300 struct voyager_softc *sc = cookie; 301 uint32_t reg; 302 303 reg = bus_space_read_4(sc->sc_memt, sc->sc_regh, SM502_GPIO_DIR0); 304 reg &= ~(1 << 13); 305 reg |= bits; 306 bus_space_write_4(sc->sc_memt, sc->sc_regh, SM502_GPIO_DIR0, reg); 307 } 308 309 static uint32_t 310 voyager_i2cbb_read(void *cookie) 311 { 312 struct voyager_softc *sc = cookie; 313 uint32_t reg; 314 315 reg = bus_space_read_4(sc->sc_memt, sc->sc_regh, SM502_GPIO_DATA0); 316 return reg; 317 } 318 319 /* higher level I2C stuff */ 320 static int 321 voyager_i2c_acquire_bus(void *cookie, int flags) 322 { 323 struct voyager_softc *sc = cookie; 324 325 mutex_enter(&sc->sc_i2c_lock); 326 return 0; 327 } 328 329 static void 330 voyager_i2c_release_bus(void *cookie, int flags) 331 { 332 struct voyager_softc *sc = cookie; 333 334 mutex_exit(&sc->sc_i2c_lock); 335 } 336 337 static int 338 voyager_i2c_send_start(void *cookie, int flags) 339 { 340 return (i2c_bitbang_send_start(cookie, flags, &voyager_i2cbb_ops)); 341 } 342 343 static int 344 voyager_i2c_send_stop(void *cookie, int flags) 345 { 346 347 return (i2c_bitbang_send_stop(cookie, flags, &voyager_i2cbb_ops)); 348 } 349 350 static int 351 voyager_i2c_initiate_xfer(void *cookie, i2c_addr_t addr, int flags) 352 { 353 /* 354 * for some reason i2c_bitbang_initiate_xfer left-shifts 355 * the I2C-address and then sets the direction bit 356 */ 357 return (i2c_bitbang_initiate_xfer(cookie, addr, flags, 358 &voyager_i2cbb_ops)); 359 } 360 361 static int 362 voyager_i2c_read_byte(void *cookie, uint8_t *valp, int flags) 363 { 364 int ret; 365 366 ret = i2c_bitbang_read_byte(cookie, valp, flags, &voyager_i2cbb_ops); 367 return ret; 368 } 369 370 static int 371 voyager_i2c_write_byte(void *cookie, uint8_t val, int flags) 372 { 373 int ret; 374 375 ret = i2c_bitbang_write_byte(cookie, val, flags, &voyager_i2cbb_ops); 376 delay(500); 377 return ret; 378 } 379 380 void 381 voyager_twiddle_bits(void *cookie, int regnum, uint32_t mask, uint32_t bits) 382 { 383 struct voyager_softc *sc = cookie; 384 uint32_t reg; 385 386 /* don't interfere with i2c ops */ 387 mutex_enter(&sc->sc_i2c_lock); 388 reg = bus_space_read_4(sc->sc_memt, sc->sc_regh, regnum); 389 reg &= mask; 390 reg |= bits; 391 bus_space_write_4(sc->sc_memt, sc->sc_regh, regnum, reg); 392 mutex_exit(&sc->sc_i2c_lock); 393 } 394 395 static int 396 voyager_intr(void *cookie) 397 { 398 struct voyager_softc *sc = voyager_cookie; 399 struct voyager_intr *ih; 400 uint32_t intrs; 401 uint32_t mask, bit; 402 int num; 403 404 intrs = bus_space_read_4(sc->sc_memt, sc->sc_regh, SM502_INTR_STATUS); 405 mask = bus_space_read_4(sc->sc_memt, sc->sc_regh, SM502_INTR_MASK); 406 intrs &= mask; 407 408 while (intrs != 0) { 409 num = ffs32(intrs) - 1; 410 bit = 1 << num; 411 intrs &= ~bit; 412 ih = &sc->sc_intrs[num]; 413 if (ih->vih_func != NULL) { 414 if (ih->vih_arg == NULL) { 415 ih->vih_func(cookie); 416 } else { 417 ih->vih_func(ih->vih_arg); 418 } 419 } 420 ih->vih_count.ev_count++; 421 } 422 return 0; 423 } 424 425 void * 426 voyager_establish_intr(device_t dev, int bit, int (*handler)(void *), void *arg) 427 { 428 struct voyager_softc *sc = device_private(dev); 429 struct voyager_intr *ih; 430 uint32_t reg; 431 432 if ((bit < 0) || (bit > 31)) { 433 aprint_error_dev(dev, "bogus interrupt %d\n", bit); 434 return NULL; 435 } 436 437 ih = &sc->sc_intrs[bit]; 438 if (ih->vih_func != NULL) { 439 aprint_error_dev(dev, "interrupt %d is already in use\n", bit); 440 return NULL; 441 } 442 ih->vih_func = handler; 443 ih->vih_arg = arg; 444 reg = bus_space_read_4(sc->sc_memt, sc->sc_regh, SM502_INTR_MASK); 445 reg |= 1 << bit; 446 bus_space_write_4(sc->sc_memt, sc->sc_regh, SM502_INTR_MASK, reg); 447 448 return (void *)(uintptr_t)(0x80000000 | bit); 449 } 450 451 void 452 voyager_disestablish_intr(device_t dev, void *ih) 453 { 454 } 455 456 /* timer */ 457 #ifdef VOYAGER_DEBUG 458 static void 459 voyager_print_pwm(struct voyager_softc *sc, int pwmreg) 460 { 461 uint32_t reg; 462 463 reg = bus_space_read_4(sc->sc_memt, sc->sc_regh, pwmreg); 464 aprint_debug_dev(sc->sc_dev, "%08x: %08x = %d Hz, %d high, %d low\n", 465 pwmreg, reg, 466 96000000 / (1 << ((reg & SM502_PWM_CLOCK_DIV_MASK) >> SM502_PWM_CLOCK_DIV_SHIFT)), 467 (reg & SM502_PWM_CLOCK_HIGH_MASK) >> SM502_PWM_CLOCK_HIGH_SHIFT, 468 (reg & SM502_PWM_CLOCK_LOW_MASK) >> SM502_PWM_CLOCK_LOW_SHIFT); 469 } 470 #endif 471 472 uint32_t 473 voyager_set_pwm(int freq, int duty_cycle) 474 { 475 int ifreq, factor, bit, steps; 476 uint32_t reg = 0, hi, lo; 477 478 /* 479 * find the smallest divider that gets us within 4096 steps of the 480 * target frequency 481 */ 482 ifreq = freq * 4096; 483 factor = 96000000 / ifreq; 484 bit = fls32(factor); 485 factor = 1 << bit; 486 steps = 96000000 / (factor * freq); 487 /* can't have it all off */ 488 if (duty_cycle < 1) 489 duty_cycle = 1; 490 /* can't be always on either */ 491 if (duty_cycle > 999) 492 duty_cycle = 999; 493 hi = steps * duty_cycle / 1000; 494 if (hi < 1) 495 hi = 1; 496 lo = steps - hi; 497 if (lo < 1) { 498 hi = steps - 1; 499 lo = 1; 500 } 501 DPRINTF("%d hz -> %d, %d, %d / %d\n", freq, factor, steps, lo, hi); 502 reg = ((hi - 1) & 0xfff) << SM502_PWM_CLOCK_HIGH_SHIFT; 503 reg |= ((lo - 1) & 0xfff) << SM502_PWM_CLOCK_LOW_SHIFT; 504 reg |= (bit & 0xf) << SM502_PWM_CLOCK_DIV_SHIFT; 505 DPRINTF("reg: %08x\n", reg); 506 return reg; 507 } 508