1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Pinctrl for Cirrus Logic Madera codecs 4 * 5 * Copyright (C) 2016-2018 Cirrus Logic 6 */ 7 8 #include <linux/err.h> 9 #include <linux/module.h> 10 #include <linux/platform_device.h> 11 #include <linux/property.h> 12 #include <linux/regmap.h> 13 #include <linux/seq_file.h> 14 #include <linux/slab.h> 15 16 #include <linux/pinctrl/machine.h> 17 #include <linux/pinctrl/pinconf-generic.h> 18 #include <linux/pinctrl/pinconf.h> 19 #include <linux/pinctrl/pinctrl.h> 20 #include <linux/pinctrl/pinmux.h> 21 22 #include <linux/mfd/madera/core.h> 23 #include <linux/mfd/madera/registers.h> 24 25 #include "../pinctrl-utils.h" 26 27 #include "pinctrl-madera.h" 28 29 /* 30 * Use pin GPIO names for consistency 31 * NOTE: IDs are zero-indexed for coding convenience 32 */ 33 static const struct pinctrl_pin_desc madera_pins[] = { 34 PINCTRL_PIN(0, "gpio1"), 35 PINCTRL_PIN(1, "gpio2"), 36 PINCTRL_PIN(2, "gpio3"), 37 PINCTRL_PIN(3, "gpio4"), 38 PINCTRL_PIN(4, "gpio5"), 39 PINCTRL_PIN(5, "gpio6"), 40 PINCTRL_PIN(6, "gpio7"), 41 PINCTRL_PIN(7, "gpio8"), 42 PINCTRL_PIN(8, "gpio9"), 43 PINCTRL_PIN(9, "gpio10"), 44 PINCTRL_PIN(10, "gpio11"), 45 PINCTRL_PIN(11, "gpio12"), 46 PINCTRL_PIN(12, "gpio13"), 47 PINCTRL_PIN(13, "gpio14"), 48 PINCTRL_PIN(14, "gpio15"), 49 PINCTRL_PIN(15, "gpio16"), 50 PINCTRL_PIN(16, "gpio17"), 51 PINCTRL_PIN(17, "gpio18"), 52 PINCTRL_PIN(18, "gpio19"), 53 PINCTRL_PIN(19, "gpio20"), 54 PINCTRL_PIN(20, "gpio21"), 55 PINCTRL_PIN(21, "gpio22"), 56 PINCTRL_PIN(22, "gpio23"), 57 PINCTRL_PIN(23, "gpio24"), 58 PINCTRL_PIN(24, "gpio25"), 59 PINCTRL_PIN(25, "gpio26"), 60 PINCTRL_PIN(26, "gpio27"), 61 PINCTRL_PIN(27, "gpio28"), 62 PINCTRL_PIN(28, "gpio29"), 63 PINCTRL_PIN(29, "gpio30"), 64 PINCTRL_PIN(30, "gpio31"), 65 PINCTRL_PIN(31, "gpio32"), 66 PINCTRL_PIN(32, "gpio33"), 67 PINCTRL_PIN(33, "gpio34"), 68 PINCTRL_PIN(34, "gpio35"), 69 PINCTRL_PIN(35, "gpio36"), 70 PINCTRL_PIN(36, "gpio37"), 71 PINCTRL_PIN(37, "gpio38"), 72 PINCTRL_PIN(38, "gpio39"), 73 PINCTRL_PIN(39, "gpio40"), 74 }; 75 76 /* 77 * All single-pin functions can be mapped to any GPIO, however pinmux applies 78 * functions to pin groups and only those groups declared as supporting that 79 * function. To make this work we must put each pin in its own dummy group so 80 * that the functions can be described as applying to all pins. 81 * Since these do not correspond to anything in the actual hardware - they are 82 * merely an adaptation to pinctrl's view of the world - we use the same name 83 * as the pin to avoid confusion when comparing with datasheet instructions 84 */ 85 static const char * const madera_pin_single_group_names[] = { 86 "gpio1", "gpio2", "gpio3", "gpio4", "gpio5", "gpio6", "gpio7", 87 "gpio8", "gpio9", "gpio10", "gpio11", "gpio12", "gpio13", "gpio14", 88 "gpio15", "gpio16", "gpio17", "gpio18", "gpio19", "gpio20", "gpio21", 89 "gpio22", "gpio23", "gpio24", "gpio25", "gpio26", "gpio27", "gpio28", 90 "gpio29", "gpio30", "gpio31", "gpio32", "gpio33", "gpio34", "gpio35", 91 "gpio36", "gpio37", "gpio38", "gpio39", "gpio40", 92 }; 93 94 /* set of pin numbers for single-pin groups, zero-indexed */ 95 static const unsigned int madera_pin_single_group_pins[] = { 96 0, 1, 2, 3, 4, 5, 6, 97 7, 8, 9, 10, 11, 12, 13, 98 14, 15, 16, 17, 18, 19, 20, 99 21, 22, 23, 24, 25, 26, 27, 100 28, 29, 30, 31, 32, 33, 34, 101 35, 36, 37, 38, 39, 102 }; 103 104 static const char * const madera_aif1_group_names[] = { "aif1" }; 105 static const char * const madera_aif2_group_names[] = { "aif2" }; 106 static const char * const madera_aif3_group_names[] = { "aif3" }; 107 static const char * const madera_aif4_group_names[] = { "aif4" }; 108 static const char * const madera_mif1_group_names[] = { "mif1" }; 109 static const char * const madera_mif2_group_names[] = { "mif2" }; 110 static const char * const madera_mif3_group_names[] = { "mif3" }; 111 static const char * const madera_dmic3_group_names[] = { "dmic3" }; 112 static const char * const madera_dmic4_group_names[] = { "dmic4" }; 113 static const char * const madera_dmic5_group_names[] = { "dmic5" }; 114 static const char * const madera_dmic6_group_names[] = { "dmic6" }; 115 static const char * const madera_spk1_group_names[] = { "pdmspk1" }; 116 static const char * const madera_spk2_group_names[] = { "pdmspk2" }; 117 118 /* 119 * alt-functions always apply to a single pin group, other functions always 120 * apply to all pins 121 */ 122 static const struct { 123 const char *name; 124 const char * const *group_names; 125 u32 func; 126 } madera_mux_funcs[] = { 127 { 128 .name = "aif1", 129 .group_names = madera_aif1_group_names, 130 .func = 0x000 131 }, 132 { 133 .name = "aif2", 134 .group_names = madera_aif2_group_names, 135 .func = 0x000 136 }, 137 { 138 .name = "aif3", 139 .group_names = madera_aif3_group_names, 140 .func = 0x000 141 }, 142 { 143 .name = "aif4", 144 .group_names = madera_aif4_group_names, 145 .func = 0x000 146 }, 147 { 148 .name = "mif1", 149 .group_names = madera_mif1_group_names, 150 .func = 0x000 151 }, 152 { 153 .name = "mif2", 154 .group_names = madera_mif2_group_names, 155 .func = 0x000 156 }, 157 { 158 .name = "mif3", 159 .group_names = madera_mif3_group_names, 160 .func = 0x000 161 }, 162 { 163 .name = "dmic3", 164 .group_names = madera_dmic3_group_names, 165 .func = 0x000 166 }, 167 { 168 .name = "dmic4", 169 .group_names = madera_dmic4_group_names, 170 .func = 0x000 171 }, 172 { 173 .name = "dmic5", 174 .group_names = madera_dmic5_group_names, 175 .func = 0x000 176 }, 177 { 178 .name = "dmic6", 179 .group_names = madera_dmic6_group_names, 180 .func = 0x000 181 }, 182 { 183 .name = "pdmspk1", 184 .group_names = madera_spk1_group_names, 185 .func = 0x000 186 }, 187 { 188 .name = "pdmspk2", 189 .group_names = madera_spk2_group_names, 190 .func = 0x000 191 }, 192 { 193 .name = "io", 194 .group_names = madera_pin_single_group_names, 195 .func = 0x001 196 }, 197 { 198 .name = "dsp-gpio", 199 .group_names = madera_pin_single_group_names, 200 .func = 0x002 201 }, 202 { 203 .name = "irq1", 204 .group_names = madera_pin_single_group_names, 205 .func = 0x003 206 }, 207 { 208 .name = "irq2", 209 .group_names = madera_pin_single_group_names, 210 .func = 0x004 211 }, 212 { 213 .name = "fll1-clk", 214 .group_names = madera_pin_single_group_names, 215 .func = 0x010 216 }, 217 { 218 .name = "fll2-clk", 219 .group_names = madera_pin_single_group_names, 220 .func = 0x011 221 }, 222 { 223 .name = "fll3-clk", 224 .group_names = madera_pin_single_group_names, 225 .func = 0x012 226 }, 227 { 228 .name = "fllao-clk", 229 .group_names = madera_pin_single_group_names, 230 .func = 0x013 231 }, 232 { 233 .name = "fll1-lock", 234 .group_names = madera_pin_single_group_names, 235 .func = 0x018 236 }, 237 { 238 .name = "fll2-lock", 239 .group_names = madera_pin_single_group_names, 240 .func = 0x019 241 }, 242 { 243 .name = "fll3-lock", 244 .group_names = madera_pin_single_group_names, 245 .func = 0x01a 246 }, 247 { 248 .name = "fllao-lock", 249 .group_names = madera_pin_single_group_names, 250 .func = 0x01b 251 }, 252 { 253 .name = "opclk", 254 .group_names = madera_pin_single_group_names, 255 .func = 0x040 256 }, 257 { 258 .name = "opclk-async", 259 .group_names = madera_pin_single_group_names, 260 .func = 0x041 261 }, 262 { 263 .name = "pwm1", 264 .group_names = madera_pin_single_group_names, 265 .func = 0x048 266 }, 267 { 268 .name = "pwm2", 269 .group_names = madera_pin_single_group_names, 270 .func = 0x049 271 }, 272 { 273 .name = "spdif", 274 .group_names = madera_pin_single_group_names, 275 .func = 0x04c 276 }, 277 { 278 .name = "asrc1-in1-lock", 279 .group_names = madera_pin_single_group_names, 280 .func = 0x088 281 }, 282 { 283 .name = "asrc1-in2-lock", 284 .group_names = madera_pin_single_group_names, 285 .func = 0x089 286 }, 287 { 288 .name = "asrc2-in1-lock", 289 .group_names = madera_pin_single_group_names, 290 .func = 0x08a 291 }, 292 { 293 .name = "asrc2-in2-lock", 294 .group_names = madera_pin_single_group_names, 295 .func = 0x08b 296 }, 297 { 298 .name = "spkl-short-circuit", 299 .group_names = madera_pin_single_group_names, 300 .func = 0x0b6 301 }, 302 { 303 .name = "spkr-short-circuit", 304 .group_names = madera_pin_single_group_names, 305 .func = 0x0b7 306 }, 307 { 308 .name = "spk-shutdown", 309 .group_names = madera_pin_single_group_names, 310 .func = 0x0e0 311 }, 312 { 313 .name = "spk-overheat-shutdown", 314 .group_names = madera_pin_single_group_names, 315 .func = 0x0e1 316 }, 317 { 318 .name = "spk-overheat-warn", 319 .group_names = madera_pin_single_group_names, 320 .func = 0x0e2 321 }, 322 { 323 .name = "timer1-sts", 324 .group_names = madera_pin_single_group_names, 325 .func = 0x140 326 }, 327 { 328 .name = "timer2-sts", 329 .group_names = madera_pin_single_group_names, 330 .func = 0x141 331 }, 332 { 333 .name = "timer3-sts", 334 .group_names = madera_pin_single_group_names, 335 .func = 0x142 336 }, 337 { 338 .name = "timer4-sts", 339 .group_names = madera_pin_single_group_names, 340 .func = 0x143 341 }, 342 { 343 .name = "timer5-sts", 344 .group_names = madera_pin_single_group_names, 345 .func = 0x144 346 }, 347 { 348 .name = "timer6-sts", 349 .group_names = madera_pin_single_group_names, 350 .func = 0x145 351 }, 352 { 353 .name = "timer7-sts", 354 .group_names = madera_pin_single_group_names, 355 .func = 0x146 356 }, 357 { 358 .name = "timer8-sts", 359 .group_names = madera_pin_single_group_names, 360 .func = 0x147 361 }, 362 { 363 .name = "log1-fifo-ne", 364 .group_names = madera_pin_single_group_names, 365 .func = 0x150 366 }, 367 { 368 .name = "log2-fifo-ne", 369 .group_names = madera_pin_single_group_names, 370 .func = 0x151 371 }, 372 { 373 .name = "log3-fifo-ne", 374 .group_names = madera_pin_single_group_names, 375 .func = 0x152 376 }, 377 { 378 .name = "log4-fifo-ne", 379 .group_names = madera_pin_single_group_names, 380 .func = 0x153 381 }, 382 { 383 .name = "log5-fifo-ne", 384 .group_names = madera_pin_single_group_names, 385 .func = 0x154 386 }, 387 { 388 .name = "log6-fifo-ne", 389 .group_names = madera_pin_single_group_names, 390 .func = 0x155 391 }, 392 { 393 .name = "log7-fifo-ne", 394 .group_names = madera_pin_single_group_names, 395 .func = 0x156 396 }, 397 { 398 .name = "log8-fifo-ne", 399 .group_names = madera_pin_single_group_names, 400 .func = 0x157 401 }, 402 { 403 .name = "aux-pdm-clk", 404 .group_names = madera_pin_single_group_names, 405 .func = 0x280 406 }, 407 { 408 .name = "aux-pdm-dat", 409 .group_names = madera_pin_single_group_names, 410 .func = 0x281 411 }, 412 }; 413 414 static u16 madera_pin_make_drv_str(struct madera_pin_private *priv, 415 unsigned int milliamps) 416 { 417 switch (milliamps) { 418 case 4: 419 return 0; 420 case 8: 421 return 2 << MADERA_GP1_DRV_STR_SHIFT; 422 default: 423 break; 424 } 425 426 dev_warn(priv->dev, "%u mA not a valid drive strength", milliamps); 427 428 return 0; 429 } 430 431 static unsigned int madera_pin_unmake_drv_str(struct madera_pin_private *priv, 432 u16 regval) 433 { 434 regval = (regval & MADERA_GP1_DRV_STR_MASK) >> MADERA_GP1_DRV_STR_SHIFT; 435 436 switch (regval) { 437 case 0: 438 return 4; 439 case 2: 440 return 8; 441 default: 442 return 0; 443 } 444 } 445 446 static int madera_get_groups_count(struct pinctrl_dev *pctldev) 447 { 448 struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev); 449 450 /* Number of alt function groups plus number of single-pin groups */ 451 return priv->chip->n_pin_groups + priv->chip->n_pins; 452 } 453 454 static const char *madera_get_group_name(struct pinctrl_dev *pctldev, 455 unsigned int selector) 456 { 457 struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev); 458 459 if (selector < priv->chip->n_pin_groups) 460 return priv->chip->pin_groups[selector].name; 461 462 selector -= priv->chip->n_pin_groups; 463 return madera_pin_single_group_names[selector]; 464 } 465 466 static int madera_get_group_pins(struct pinctrl_dev *pctldev, 467 unsigned int selector, 468 const unsigned int **pins, 469 unsigned int *num_pins) 470 { 471 struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev); 472 473 if (selector < priv->chip->n_pin_groups) { 474 *pins = priv->chip->pin_groups[selector].pins; 475 *num_pins = priv->chip->pin_groups[selector].n_pins; 476 } else { 477 /* return the dummy group for a single pin */ 478 selector -= priv->chip->n_pin_groups; 479 *pins = &madera_pin_single_group_pins[selector]; 480 *num_pins = 1; 481 } 482 return 0; 483 } 484 485 static void madera_pin_dbg_show_fn(struct madera_pin_private *priv, 486 struct seq_file *s, 487 unsigned int pin, unsigned int fn) 488 { 489 const struct madera_pin_chip *chip = priv->chip; 490 int i, g_pin; 491 492 if (fn != 0) { 493 for (i = 0; i < ARRAY_SIZE(madera_mux_funcs); ++i) { 494 if (madera_mux_funcs[i].func == fn) { 495 seq_printf(s, " FN=%s", 496 madera_mux_funcs[i].name); 497 return; 498 } 499 } 500 return; /* ignore unknown function values */ 501 } 502 503 /* alt function */ 504 for (i = 0; i < chip->n_pin_groups; ++i) { 505 for (g_pin = 0; g_pin < chip->pin_groups[i].n_pins; ++g_pin) { 506 if (chip->pin_groups[i].pins[g_pin] == pin) { 507 seq_printf(s, " FN=%s", 508 chip->pin_groups[i].name); 509 return; 510 } 511 } 512 } 513 } 514 515 static void __maybe_unused madera_pin_dbg_show(struct pinctrl_dev *pctldev, 516 struct seq_file *s, 517 unsigned int pin) 518 { 519 struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev); 520 unsigned int conf[2]; 521 unsigned int reg = MADERA_GPIO1_CTRL_1 + (2 * pin); 522 unsigned int fn; 523 int ret; 524 525 ret = regmap_read(priv->madera->regmap, reg, &conf[0]); 526 if (ret) 527 return; 528 529 ret = regmap_read(priv->madera->regmap, reg + 1, &conf[1]); 530 if (ret) 531 return; 532 533 seq_printf(s, "%04x:%04x", conf[0], conf[1]); 534 535 fn = (conf[0] & MADERA_GP1_FN_MASK) >> MADERA_GP1_FN_SHIFT; 536 madera_pin_dbg_show_fn(priv, s, pin, fn); 537 538 /* State of direction bit is only relevant if function==1 */ 539 if (fn == 1) { 540 if (conf[1] & MADERA_GP1_DIR_MASK) 541 seq_puts(s, " IN"); 542 else 543 seq_puts(s, " OUT"); 544 } 545 546 if (conf[1] & MADERA_GP1_PU_MASK) 547 seq_puts(s, " PU"); 548 549 if (conf[1] & MADERA_GP1_PD_MASK) 550 seq_puts(s, " PD"); 551 552 if (conf[0] & MADERA_GP1_DB_MASK) 553 seq_puts(s, " DB"); 554 555 if (conf[0] & MADERA_GP1_OP_CFG_MASK) 556 seq_puts(s, " OD"); 557 else 558 seq_puts(s, " CMOS"); 559 560 seq_printf(s, " DRV=%umA", madera_pin_unmake_drv_str(priv, conf[1])); 561 562 if (conf[0] & MADERA_GP1_IP_CFG_MASK) 563 seq_puts(s, " SCHMITT"); 564 } 565 566 static const struct pinctrl_ops madera_pin_group_ops = { 567 .get_groups_count = madera_get_groups_count, 568 .get_group_name = madera_get_group_name, 569 .get_group_pins = madera_get_group_pins, 570 #if IS_ENABLED(CONFIG_OF) 571 .dt_node_to_map = pinconf_generic_dt_node_to_map_all, 572 .dt_free_map = pinctrl_utils_free_map, 573 #endif 574 #if IS_ENABLED(CONFIG_DEBUG_FS) 575 .pin_dbg_show = madera_pin_dbg_show, 576 #endif 577 }; 578 579 static int madera_mux_get_funcs_count(struct pinctrl_dev *pctldev) 580 { 581 return ARRAY_SIZE(madera_mux_funcs); 582 } 583 584 static const char *madera_mux_get_func_name(struct pinctrl_dev *pctldev, 585 unsigned int selector) 586 { 587 return madera_mux_funcs[selector].name; 588 } 589 590 static int madera_mux_get_groups(struct pinctrl_dev *pctldev, 591 unsigned int selector, 592 const char * const **groups, 593 unsigned int * const num_groups) 594 { 595 struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev); 596 597 *groups = madera_mux_funcs[selector].group_names; 598 599 if (madera_mux_funcs[selector].func == 0) { 600 /* alt func always maps to a single group */ 601 *num_groups = 1; 602 } else { 603 /* other funcs map to all available gpio pins */ 604 *num_groups = priv->chip->n_pins; 605 } 606 607 return 0; 608 } 609 610 static int madera_mux_set_mux(struct pinctrl_dev *pctldev, 611 unsigned int selector, 612 unsigned int group) 613 { 614 struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev); 615 struct madera *madera = priv->madera; 616 const struct madera_pin_groups *pin_group = priv->chip->pin_groups; 617 unsigned int n_chip_groups = priv->chip->n_pin_groups; 618 const char *func_name = madera_mux_funcs[selector].name; 619 unsigned int reg; 620 int i, ret = 0; 621 622 dev_dbg(priv->dev, "%s selecting %u (%s) for group %u (%s)\n", 623 __func__, selector, func_name, group, 624 madera_get_group_name(pctldev, group)); 625 626 if (madera_mux_funcs[selector].func == 0) { 627 /* alt func pin assignments are codec-specific */ 628 for (i = 0; i < n_chip_groups; ++i) { 629 if (strcmp(func_name, pin_group->name) == 0) 630 break; 631 632 ++pin_group; 633 } 634 635 if (i == n_chip_groups) 636 return -EINVAL; 637 638 for (i = 0; i < pin_group->n_pins; ++i) { 639 reg = MADERA_GPIO1_CTRL_1 + (2 * pin_group->pins[i]); 640 641 dev_dbg(priv->dev, "%s setting 0x%x func bits to 0\n", 642 __func__, reg); 643 644 ret = regmap_update_bits(madera->regmap, reg, 645 MADERA_GP1_FN_MASK, 0); 646 if (ret) 647 break; 648 649 } 650 } else { 651 /* 652 * for other funcs the group will be the gpio number and will 653 * be offset by the number of chip-specific functions at the 654 * start of the group list 655 */ 656 group -= n_chip_groups; 657 reg = MADERA_GPIO1_CTRL_1 + (2 * group); 658 659 dev_dbg(priv->dev, "%s setting 0x%x func bits to 0x%x\n", 660 __func__, reg, madera_mux_funcs[selector].func); 661 662 ret = regmap_update_bits(madera->regmap, 663 reg, 664 MADERA_GP1_FN_MASK, 665 madera_mux_funcs[selector].func); 666 } 667 668 if (ret) 669 dev_err(priv->dev, "Failed to write to 0x%x (%d)\n", reg, ret); 670 671 return ret; 672 } 673 674 static int madera_gpio_set_direction(struct pinctrl_dev *pctldev, 675 struct pinctrl_gpio_range *range, 676 unsigned int offset, 677 bool input) 678 { 679 struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev); 680 struct madera *madera = priv->madera; 681 unsigned int reg = MADERA_GPIO1_CTRL_2 + (2 * offset); 682 unsigned int val; 683 int ret; 684 685 if (input) 686 val = MADERA_GP1_DIR; 687 else 688 val = 0; 689 690 ret = regmap_update_bits(madera->regmap, reg, MADERA_GP1_DIR_MASK, val); 691 if (ret) 692 dev_err(priv->dev, "Failed to write to 0x%x (%d)\n", reg, ret); 693 694 return ret; 695 } 696 697 static int madera_gpio_request_enable(struct pinctrl_dev *pctldev, 698 struct pinctrl_gpio_range *range, 699 unsigned int offset) 700 { 701 struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev); 702 struct madera *madera = priv->madera; 703 unsigned int reg = MADERA_GPIO1_CTRL_1 + (2 * offset); 704 int ret; 705 706 /* put the pin into GPIO mode */ 707 ret = regmap_update_bits(madera->regmap, reg, MADERA_GP1_FN_MASK, 1); 708 if (ret) 709 dev_err(priv->dev, "Failed to write to 0x%x (%d)\n", reg, ret); 710 711 return ret; 712 } 713 714 static void madera_gpio_disable_free(struct pinctrl_dev *pctldev, 715 struct pinctrl_gpio_range *range, 716 unsigned int offset) 717 { 718 struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev); 719 struct madera *madera = priv->madera; 720 unsigned int reg = MADERA_GPIO1_CTRL_1 + (2 * offset); 721 int ret; 722 723 /* disable GPIO by setting to GPIO IN */ 724 madera_gpio_set_direction(pctldev, range, offset, true); 725 726 ret = regmap_update_bits(madera->regmap, reg, MADERA_GP1_FN_MASK, 1); 727 if (ret) 728 dev_err(priv->dev, "Failed to write to 0x%x (%d)\n", reg, ret); 729 } 730 731 static const struct pinmux_ops madera_pin_mux_ops = { 732 .get_functions_count = madera_mux_get_funcs_count, 733 .get_function_name = madera_mux_get_func_name, 734 .get_function_groups = madera_mux_get_groups, 735 .set_mux = madera_mux_set_mux, 736 .gpio_request_enable = madera_gpio_request_enable, 737 .gpio_disable_free = madera_gpio_disable_free, 738 .gpio_set_direction = madera_gpio_set_direction, 739 .strict = true, /* GPIO and other functions are exclusive */ 740 }; 741 742 static int madera_pin_conf_get(struct pinctrl_dev *pctldev, unsigned int pin, 743 unsigned long *config) 744 { 745 struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev); 746 unsigned int param = pinconf_to_config_param(*config); 747 unsigned int result = 0; 748 unsigned int reg = MADERA_GPIO1_CTRL_1 + (2 * pin); 749 unsigned int conf[2]; 750 int ret; 751 752 ret = regmap_read(priv->madera->regmap, reg, &conf[0]); 753 if (!ret) 754 ret = regmap_read(priv->madera->regmap, reg + 1, &conf[1]); 755 756 if (ret) { 757 dev_err(priv->dev, "Failed to read GP%d conf (%d)\n", 758 pin + 1, ret); 759 return ret; 760 } 761 762 switch (param) { 763 case PIN_CONFIG_BIAS_BUS_HOLD: 764 conf[1] &= MADERA_GP1_PU_MASK | MADERA_GP1_PD_MASK; 765 if (conf[1] == (MADERA_GP1_PU | MADERA_GP1_PD)) 766 result = 1; 767 break; 768 case PIN_CONFIG_BIAS_DISABLE: 769 conf[1] &= MADERA_GP1_PU_MASK | MADERA_GP1_PD_MASK; 770 if (!conf[1]) 771 result = 1; 772 break; 773 case PIN_CONFIG_BIAS_PULL_DOWN: 774 conf[1] &= MADERA_GP1_PU_MASK | MADERA_GP1_PD_MASK; 775 if (conf[1] == MADERA_GP1_PD_MASK) 776 result = 1; 777 break; 778 case PIN_CONFIG_BIAS_PULL_UP: 779 conf[1] &= MADERA_GP1_PU_MASK | MADERA_GP1_PD_MASK; 780 if (conf[1] == MADERA_GP1_PU_MASK) 781 result = 1; 782 break; 783 case PIN_CONFIG_DRIVE_OPEN_DRAIN: 784 if (conf[0] & MADERA_GP1_OP_CFG_MASK) 785 result = 1; 786 break; 787 case PIN_CONFIG_DRIVE_PUSH_PULL: 788 if (!(conf[0] & MADERA_GP1_OP_CFG_MASK)) 789 result = 1; 790 break; 791 case PIN_CONFIG_DRIVE_STRENGTH: 792 result = madera_pin_unmake_drv_str(priv, conf[1]); 793 break; 794 case PIN_CONFIG_INPUT_DEBOUNCE: 795 if (conf[0] & MADERA_GP1_DB_MASK) 796 result = 1; 797 break; 798 case PIN_CONFIG_INPUT_ENABLE: 799 if (conf[0] & MADERA_GP1_DIR_MASK) 800 result = 1; 801 break; 802 case PIN_CONFIG_INPUT_SCHMITT: 803 case PIN_CONFIG_INPUT_SCHMITT_ENABLE: 804 if (conf[0] & MADERA_GP1_IP_CFG_MASK) 805 result = 1; 806 break; 807 case PIN_CONFIG_OUTPUT: 808 if ((conf[1] & MADERA_GP1_DIR_MASK) && 809 (conf[0] & MADERA_GP1_LVL_MASK)) 810 result = 1; 811 break; 812 default: 813 return -ENOTSUPP; 814 } 815 816 *config = pinconf_to_config_packed(param, result); 817 818 return 0; 819 } 820 821 static int madera_pin_conf_set(struct pinctrl_dev *pctldev, unsigned int pin, 822 unsigned long *configs, unsigned int num_configs) 823 { 824 struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev); 825 u16 conf[2] = {0, 0}; 826 u16 mask[2] = {0, 0}; 827 unsigned int reg = MADERA_GPIO1_CTRL_1 + (2 * pin); 828 unsigned int val; 829 int ret; 830 831 while (num_configs) { 832 dev_dbg(priv->dev, "%s config 0x%lx\n", __func__, *configs); 833 834 switch (pinconf_to_config_param(*configs)) { 835 case PIN_CONFIG_BIAS_BUS_HOLD: 836 mask[1] |= MADERA_GP1_PU_MASK | MADERA_GP1_PD_MASK; 837 conf[1] |= MADERA_GP1_PU | MADERA_GP1_PD; 838 break; 839 case PIN_CONFIG_BIAS_DISABLE: 840 mask[1] |= MADERA_GP1_PU_MASK | MADERA_GP1_PD_MASK; 841 conf[1] &= ~(MADERA_GP1_PU | MADERA_GP1_PD); 842 break; 843 case PIN_CONFIG_BIAS_PULL_DOWN: 844 mask[1] |= MADERA_GP1_PU_MASK | MADERA_GP1_PD_MASK; 845 conf[1] |= MADERA_GP1_PD; 846 conf[1] &= ~MADERA_GP1_PU; 847 break; 848 case PIN_CONFIG_BIAS_PULL_UP: 849 mask[1] |= MADERA_GP1_PU_MASK | MADERA_GP1_PD_MASK; 850 conf[1] |= MADERA_GP1_PU; 851 conf[1] &= ~MADERA_GP1_PD; 852 break; 853 case PIN_CONFIG_DRIVE_OPEN_DRAIN: 854 mask[0] |= MADERA_GP1_OP_CFG_MASK; 855 conf[0] |= MADERA_GP1_OP_CFG; 856 break; 857 case PIN_CONFIG_DRIVE_PUSH_PULL: 858 mask[0] |= MADERA_GP1_OP_CFG_MASK; 859 conf[0] &= ~MADERA_GP1_OP_CFG; 860 break; 861 case PIN_CONFIG_DRIVE_STRENGTH: 862 val = pinconf_to_config_argument(*configs); 863 mask[1] |= MADERA_GP1_DRV_STR_MASK; 864 conf[1] &= ~MADERA_GP1_DRV_STR_MASK; 865 conf[1] |= madera_pin_make_drv_str(priv, val); 866 break; 867 case PIN_CONFIG_INPUT_DEBOUNCE: 868 mask[0] |= MADERA_GP1_DB_MASK; 869 870 /* 871 * we can't configure debounce time per-pin so value 872 * is just a flag 873 */ 874 val = pinconf_to_config_argument(*configs); 875 if (val) 876 conf[0] |= MADERA_GP1_DB; 877 else 878 conf[0] &= ~MADERA_GP1_DB; 879 break; 880 case PIN_CONFIG_INPUT_ENABLE: 881 val = pinconf_to_config_argument(*configs); 882 mask[1] |= MADERA_GP1_DIR_MASK; 883 if (val) 884 conf[1] |= MADERA_GP1_DIR; 885 else 886 conf[1] &= ~MADERA_GP1_DIR; 887 break; 888 case PIN_CONFIG_INPUT_SCHMITT: 889 val = pinconf_to_config_argument(*configs); 890 mask[0] |= MADERA_GP1_IP_CFG; 891 if (val) 892 conf[0] |= MADERA_GP1_IP_CFG; 893 else 894 conf[0] &= ~MADERA_GP1_IP_CFG; 895 896 mask[1] |= MADERA_GP1_DIR_MASK; 897 conf[1] |= MADERA_GP1_DIR; 898 break; 899 case PIN_CONFIG_INPUT_SCHMITT_ENABLE: 900 mask[0] |= MADERA_GP1_IP_CFG; 901 conf[0] |= MADERA_GP1_IP_CFG; 902 mask[1] |= MADERA_GP1_DIR_MASK; 903 conf[1] |= MADERA_GP1_DIR; 904 break; 905 case PIN_CONFIG_OUTPUT: 906 val = pinconf_to_config_argument(*configs); 907 mask[0] |= MADERA_GP1_LVL_MASK; 908 if (val) 909 conf[0] |= MADERA_GP1_LVL; 910 else 911 conf[0] &= ~MADERA_GP1_LVL; 912 913 mask[1] |= MADERA_GP1_DIR_MASK; 914 conf[1] &= ~MADERA_GP1_DIR; 915 break; 916 default: 917 return -ENOTSUPP; 918 } 919 920 ++configs; 921 --num_configs; 922 } 923 924 dev_dbg(priv->dev, 925 "%s gpio%d 0x%x:0x%x 0x%x:0x%x\n", 926 __func__, pin + 1, reg, conf[0], reg + 1, conf[1]); 927 928 ret = regmap_update_bits(priv->madera->regmap, reg, mask[0], conf[0]); 929 if (ret) 930 goto err; 931 932 ++reg; 933 ret = regmap_update_bits(priv->madera->regmap, reg, mask[1], conf[1]); 934 if (ret) 935 goto err; 936 937 return 0; 938 939 err: 940 dev_err(priv->dev, 941 "Failed to write GPIO%d conf (%d) reg 0x%x\n", 942 pin + 1, ret, reg); 943 944 return ret; 945 } 946 947 static int madera_pin_conf_group_set(struct pinctrl_dev *pctldev, 948 unsigned int selector, 949 unsigned long *configs, 950 unsigned int num_configs) 951 { 952 struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev); 953 const struct madera_pin_groups *pin_group; 954 unsigned int n_groups = priv->chip->n_pin_groups; 955 int i, ret; 956 957 dev_dbg(priv->dev, "%s setting group %s\n", __func__, 958 madera_get_group_name(pctldev, selector)); 959 960 if (selector >= n_groups) { 961 /* group is a single pin, convert to pin number and set */ 962 return madera_pin_conf_set(pctldev, 963 selector - n_groups, 964 configs, 965 num_configs); 966 } else { 967 pin_group = &priv->chip->pin_groups[selector]; 968 969 for (i = 0; i < pin_group->n_pins; ++i) { 970 ret = madera_pin_conf_set(pctldev, 971 pin_group->pins[i], 972 configs, 973 num_configs); 974 if (ret) 975 return ret; 976 } 977 } 978 979 return 0; 980 } 981 982 static const struct pinconf_ops madera_pin_conf_ops = { 983 .is_generic = true, 984 .pin_config_get = madera_pin_conf_get, 985 .pin_config_set = madera_pin_conf_set, 986 .pin_config_group_set = madera_pin_conf_group_set, 987 }; 988 989 static struct pinctrl_desc madera_pin_desc = { 990 .name = "madera-pinctrl", 991 .pins = madera_pins, 992 .pctlops = &madera_pin_group_ops, 993 .pmxops = &madera_pin_mux_ops, 994 .confops = &madera_pin_conf_ops, 995 .owner = THIS_MODULE, 996 }; 997 998 static int madera_pin_probe(struct platform_device *pdev) 999 { 1000 struct madera *madera = dev_get_drvdata(pdev->dev.parent); 1001 const struct madera_pdata *pdata = &madera->pdata; 1002 struct madera_pin_private *priv; 1003 int ret; 1004 1005 BUILD_BUG_ON(ARRAY_SIZE(madera_pin_single_group_names) != 1006 ARRAY_SIZE(madera_pin_single_group_pins)); 1007 1008 dev_dbg(&pdev->dev, "%s\n", __func__); 1009 1010 device_set_node(&pdev->dev, dev_fwnode(pdev->dev.parent)); 1011 1012 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); 1013 if (!priv) 1014 return -ENOMEM; 1015 1016 priv->dev = &pdev->dev; 1017 priv->madera = madera; 1018 1019 switch (madera->type) { 1020 case CS47L15: 1021 if (IS_ENABLED(CONFIG_PINCTRL_CS47L15)) 1022 priv->chip = &cs47l15_pin_chip; 1023 break; 1024 case CS47L35: 1025 if (IS_ENABLED(CONFIG_PINCTRL_CS47L35)) 1026 priv->chip = &cs47l35_pin_chip; 1027 break; 1028 case CS47L85: 1029 case WM1840: 1030 if (IS_ENABLED(CONFIG_PINCTRL_CS47L85)) 1031 priv->chip = &cs47l85_pin_chip; 1032 break; 1033 case CS47L90: 1034 case CS47L91: 1035 if (IS_ENABLED(CONFIG_PINCTRL_CS47L90)) 1036 priv->chip = &cs47l90_pin_chip; 1037 break; 1038 case CS42L92: 1039 case CS47L92: 1040 case CS47L93: 1041 if (IS_ENABLED(CONFIG_PINCTRL_CS47L92)) 1042 priv->chip = &cs47l92_pin_chip; 1043 break; 1044 default: 1045 break; 1046 } 1047 1048 if (!priv->chip) 1049 return -ENODEV; 1050 1051 madera_pin_desc.npins = priv->chip->n_pins; 1052 1053 ret = devm_pinctrl_register_and_init(&pdev->dev, 1054 &madera_pin_desc, 1055 priv, 1056 &priv->pctl); 1057 if (ret) { 1058 dev_err(priv->dev, "Failed pinctrl register (%d)\n", ret); 1059 return ret; 1060 } 1061 1062 /* if the configuration is provided through pdata, apply it */ 1063 if (pdata->gpio_configs) { 1064 ret = pinctrl_register_mappings(pdata->gpio_configs, 1065 pdata->n_gpio_configs); 1066 if (ret) { 1067 dev_err(priv->dev, 1068 "Failed to register pdata mappings (%d)\n", 1069 ret); 1070 return ret; 1071 } 1072 } 1073 1074 ret = pinctrl_enable(priv->pctl); 1075 if (ret) { 1076 dev_err(priv->dev, "Failed to enable pinctrl (%d)\n", ret); 1077 return ret; 1078 } 1079 1080 platform_set_drvdata(pdev, priv); 1081 1082 dev_dbg(priv->dev, "pinctrl probed ok\n"); 1083 1084 return 0; 1085 } 1086 1087 static int madera_pin_remove(struct platform_device *pdev) 1088 { 1089 struct madera_pin_private *priv = platform_get_drvdata(pdev); 1090 1091 if (priv->madera->pdata.gpio_configs) 1092 pinctrl_unregister_mappings(priv->madera->pdata.gpio_configs); 1093 1094 return 0; 1095 } 1096 1097 static struct platform_driver madera_pin_driver = { 1098 .probe = madera_pin_probe, 1099 .remove = madera_pin_remove, 1100 .driver = { 1101 .name = "madera-pinctrl", 1102 }, 1103 }; 1104 1105 module_platform_driver(madera_pin_driver); 1106 1107 MODULE_DESCRIPTION("Madera pinctrl driver"); 1108 MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>"); 1109 MODULE_LICENSE("GPL v2"); 1110