1// SPDX-License-Identifier: GPL-2.0 2// Copyright (c) 2016-2018 Nuvoton Technology corporation. 3// Copyright (c) 2016, Dell Inc 4// Copyright (c) 2021-2022 Jonathan Neuschäfer 5// 6// This driver uses the following registers: 7// - Pin mux registers, in the GCR (general control registers) block 8// - GPIO registers, specific to each GPIO bank 9// - GPIO event (interrupt) registers, located centrally in the GPIO register 10// block, shared between all GPIO banks 11 12#include <linux/device.h> 13#include <linux/fwnode.h> 14#include <linux/gpio/driver.h> 15#include <linux/interrupt.h> 16#include <linux/irq.h> 17#include <linux/mfd/syscon.h> 18#include <linux/module.h> 19#include <linux/mod_devicetable.h> 20#include <linux/platform_device.h> 21#include <linux/regmap.h> 22 23#include <linux/pinctrl/pinconf.h> 24#include <linux/pinctrl/pinconf-generic.h> 25#include <linux/pinctrl/pinctrl.h> 26#include <linux/pinctrl/pinmux.h> 27 28#include "../core.h" 29 30/* GCR registers */ 31#define WPCM450_GCR_MFSEL1 0x0c 32#define WPCM450_GCR_MFSEL2 0x10 33#define WPCM450_GCR_NONE 0 34 35/* GPIO event (interrupt) registers */ 36#define WPCM450_GPEVTYPE 0x00 37#define WPCM450_GPEVPOL 0x04 38#define WPCM450_GPEVDBNC 0x08 39#define WPCM450_GPEVEN 0x0c 40#define WPCM450_GPEVST 0x10 41 42#define WPCM450_NUM_BANKS 8 43#define WPCM450_NUM_GPIOS 128 44#define WPCM450_NUM_GPIO_IRQS 4 45 46struct wpcm450_pinctrl; 47struct wpcm450_bank; 48 49struct wpcm450_gpio { 50 struct gpio_chip gc; 51 struct wpcm450_pinctrl *pctrl; 52 const struct wpcm450_bank *bank; 53}; 54 55struct wpcm450_pinctrl { 56 struct pinctrl_dev *pctldev; 57 struct device *dev; 58 struct irq_domain *domain; 59 struct regmap *gcr_regmap; 60 void __iomem *gpio_base; 61 struct wpcm450_gpio gpio_bank[WPCM450_NUM_BANKS]; 62 unsigned long both_edges; 63 64 /* 65 * This spin lock protects registers and struct wpcm450_pinctrl fields 66 * against concurrent access. 67 */ 68 raw_spinlock_t lock; 69}; 70 71struct wpcm450_bank { 72 /* Range of GPIOs in this port */ 73 u8 base; 74 u8 length; 75 76 /* Register offsets (0 = register doesn't exist in this port) */ 77 u8 cfg0, cfg1, cfg2; 78 u8 blink; 79 u8 dataout, datain; 80 81 /* Interrupt bit mapping */ 82 u8 first_irq_bit; /* First bit in GPEVST that belongs to this bank */ 83 u8 num_irqs; /* Number of IRQ-capable GPIOs in this bank */ 84 u8 first_irq_gpio; /* First IRQ-capable GPIO in this bank */ 85}; 86 87static const struct wpcm450_bank wpcm450_banks[WPCM450_NUM_BANKS] = { 88 /* range cfg0 cfg1 cfg2 blink out in IRQ map */ 89 { 0, 16, 0x14, 0x18, 0, 0, 0x1c, 0x20, 0, 16, 0 }, 90 { 16, 16, 0x24, 0x28, 0x2c, 0x30, 0x34, 0x38, 16, 2, 8 }, 91 { 32, 16, 0x3c, 0x40, 0x44, 0, 0x48, 0x4c, 0, 0, 0 }, 92 { 48, 16, 0x50, 0x54, 0x58, 0, 0x5c, 0x60, 0, 0, 0 }, 93 { 64, 16, 0x64, 0x68, 0x6c, 0, 0x70, 0x74, 0, 0, 0 }, 94 { 80, 16, 0x78, 0x7c, 0x80, 0, 0x84, 0x88, 0, 0, 0 }, 95 { 96, 18, 0, 0, 0, 0, 0, 0x8c, 0, 0, 0 }, 96 { 114, 14, 0x90, 0x94, 0x98, 0, 0x9c, 0xa0, 0, 0, 0 }, 97}; 98 99static int wpcm450_gpio_irq_bitnum(struct wpcm450_gpio *gpio, struct irq_data *d) 100{ 101 const struct wpcm450_bank *bank = gpio->bank; 102 int hwirq = irqd_to_hwirq(d); 103 104 if (hwirq < bank->first_irq_gpio) 105 return -EINVAL; 106 107 if (hwirq - bank->first_irq_gpio >= bank->num_irqs) 108 return -EINVAL; 109 110 return hwirq - bank->first_irq_gpio + bank->first_irq_bit; 111} 112 113static int wpcm450_irq_bitnum_to_gpio(struct wpcm450_gpio *gpio, int bitnum) 114{ 115 const struct wpcm450_bank *bank = gpio->bank; 116 117 if (bitnum < bank->first_irq_bit) 118 return -EINVAL; 119 120 if (bitnum - bank->first_irq_bit > bank->num_irqs) 121 return -EINVAL; 122 123 return bitnum - bank->first_irq_bit + bank->first_irq_gpio; 124} 125 126static void wpcm450_gpio_irq_ack(struct irq_data *d) 127{ 128 struct wpcm450_gpio *gpio = gpiochip_get_data(irq_data_get_irq_chip_data(d)); 129 struct wpcm450_pinctrl *pctrl = gpio->pctrl; 130 unsigned long flags; 131 int bit; 132 133 bit = wpcm450_gpio_irq_bitnum(gpio, d); 134 if (bit < 0) 135 return; 136 137 raw_spin_lock_irqsave(&pctrl->lock, flags); 138 iowrite32(BIT(bit), pctrl->gpio_base + WPCM450_GPEVST); 139 raw_spin_unlock_irqrestore(&pctrl->lock, flags); 140} 141 142static void wpcm450_gpio_irq_mask(struct irq_data *d) 143{ 144 struct gpio_chip *gc = irq_data_get_irq_chip_data(d); 145 struct wpcm450_gpio *gpio = gpiochip_get_data(gc); 146 struct wpcm450_pinctrl *pctrl = gpio->pctrl; 147 unsigned long flags; 148 unsigned long even; 149 int bit; 150 151 bit = wpcm450_gpio_irq_bitnum(gpio, d); 152 if (bit < 0) 153 return; 154 155 raw_spin_lock_irqsave(&pctrl->lock, flags); 156 even = ioread32(pctrl->gpio_base + WPCM450_GPEVEN); 157 __assign_bit(bit, &even, 0); 158 iowrite32(even, pctrl->gpio_base + WPCM450_GPEVEN); 159 raw_spin_unlock_irqrestore(&pctrl->lock, flags); 160 161 gpiochip_disable_irq(gc, irqd_to_hwirq(d)); 162} 163 164static void wpcm450_gpio_irq_unmask(struct irq_data *d) 165{ 166 struct gpio_chip *gc = irq_data_get_irq_chip_data(d); 167 struct wpcm450_gpio *gpio = gpiochip_get_data(gc); 168 struct wpcm450_pinctrl *pctrl = gpio->pctrl; 169 unsigned long flags; 170 unsigned long even; 171 int bit; 172 173 bit = wpcm450_gpio_irq_bitnum(gpio, d); 174 if (bit < 0) 175 return; 176 177 gpiochip_enable_irq(gc, irqd_to_hwirq(d)); 178 179 raw_spin_lock_irqsave(&pctrl->lock, flags); 180 even = ioread32(pctrl->gpio_base + WPCM450_GPEVEN); 181 __assign_bit(bit, &even, 1); 182 iowrite32(even, pctrl->gpio_base + WPCM450_GPEVEN); 183 raw_spin_unlock_irqrestore(&pctrl->lock, flags); 184} 185 186/* 187 * This is an implementation of the gpio_chip->get() function, for use in 188 * wpcm450_gpio_fix_evpol. Unfortunately, we can't use the bgpio-provided 189 * implementation there, because it would require taking gpio_chip->bgpio_lock, 190 * which is a spin lock, but wpcm450_gpio_fix_evpol must work in contexts where 191 * a raw spin lock is held. 192 */ 193static int wpcm450_gpio_get(struct wpcm450_gpio *gpio, int offset) 194{ 195 void __iomem *reg = gpio->pctrl->gpio_base + gpio->bank->datain; 196 unsigned long flags; 197 u32 level; 198 199 raw_spin_lock_irqsave(&gpio->pctrl->lock, flags); 200 level = !!(ioread32(reg) & BIT(offset)); 201 raw_spin_unlock_irqrestore(&gpio->pctrl->lock, flags); 202 203 return level; 204} 205 206/* 207 * Since the GPIO controller does not support dual-edge triggered interrupts 208 * (IRQ_TYPE_EDGE_BOTH), they are emulated using rising/falling edge triggered 209 * interrupts. wpcm450_gpio_fix_evpol sets the interrupt polarity for the 210 * specified emulated dual-edge triggered interrupts, so that the next edge can 211 * be detected. 212 */ 213static void wpcm450_gpio_fix_evpol(struct wpcm450_gpio *gpio, unsigned long all) 214{ 215 struct wpcm450_pinctrl *pctrl = gpio->pctrl; 216 unsigned int bit; 217 218 for_each_set_bit(bit, &all, 32) { 219 int offset = wpcm450_irq_bitnum_to_gpio(gpio, bit); 220 unsigned long evpol; 221 unsigned long flags; 222 int level; 223 224 do { 225 level = wpcm450_gpio_get(gpio, offset); 226 227 /* Switch event polarity to the opposite of the current level */ 228 raw_spin_lock_irqsave(&pctrl->lock, flags); 229 evpol = ioread32(pctrl->gpio_base + WPCM450_GPEVPOL); 230 __assign_bit(bit, &evpol, !level); 231 iowrite32(evpol, pctrl->gpio_base + WPCM450_GPEVPOL); 232 raw_spin_unlock_irqrestore(&pctrl->lock, flags); 233 234 } while (wpcm450_gpio_get(gpio, offset) != level); 235 } 236} 237 238static int wpcm450_gpio_set_irq_type(struct irq_data *d, unsigned int flow_type) 239{ 240 struct wpcm450_gpio *gpio = gpiochip_get_data(irq_data_get_irq_chip_data(d)); 241 struct wpcm450_pinctrl *pctrl = gpio->pctrl; 242 unsigned long evtype, evpol; 243 unsigned long flags; 244 int ret = 0; 245 int bit; 246 247 bit = wpcm450_gpio_irq_bitnum(gpio, d); 248 if (bit < 0) 249 return bit; 250 251 irq_set_handler_locked(d, handle_level_irq); 252 253 raw_spin_lock_irqsave(&pctrl->lock, flags); 254 evtype = ioread32(pctrl->gpio_base + WPCM450_GPEVTYPE); 255 evpol = ioread32(pctrl->gpio_base + WPCM450_GPEVPOL); 256 __assign_bit(bit, &pctrl->both_edges, 0); 257 switch (flow_type) { 258 case IRQ_TYPE_LEVEL_LOW: 259 __assign_bit(bit, &evtype, 1); 260 __assign_bit(bit, &evpol, 0); 261 break; 262 case IRQ_TYPE_LEVEL_HIGH: 263 __assign_bit(bit, &evtype, 1); 264 __assign_bit(bit, &evpol, 1); 265 break; 266 case IRQ_TYPE_EDGE_FALLING: 267 __assign_bit(bit, &evtype, 0); 268 __assign_bit(bit, &evpol, 0); 269 break; 270 case IRQ_TYPE_EDGE_RISING: 271 __assign_bit(bit, &evtype, 0); 272 __assign_bit(bit, &evpol, 1); 273 break; 274 case IRQ_TYPE_EDGE_BOTH: 275 __assign_bit(bit, &evtype, 0); 276 __assign_bit(bit, &pctrl->both_edges, 1); 277 break; 278 default: 279 ret = -EINVAL; 280 } 281 iowrite32(evtype, pctrl->gpio_base + WPCM450_GPEVTYPE); 282 iowrite32(evpol, pctrl->gpio_base + WPCM450_GPEVPOL); 283 284 /* clear the event status for good measure */ 285 iowrite32(BIT(bit), pctrl->gpio_base + WPCM450_GPEVST); 286 287 raw_spin_unlock_irqrestore(&pctrl->lock, flags); 288 289 /* fix event polarity after clearing event status */ 290 wpcm450_gpio_fix_evpol(gpio, BIT(bit)); 291 292 return ret; 293} 294 295static const struct irq_chip wpcm450_gpio_irqchip = { 296 .name = "WPCM450-GPIO-IRQ", 297 .irq_ack = wpcm450_gpio_irq_ack, 298 .irq_unmask = wpcm450_gpio_irq_unmask, 299 .irq_mask = wpcm450_gpio_irq_mask, 300 .irq_set_type = wpcm450_gpio_set_irq_type, 301 .flags = IRQCHIP_IMMUTABLE, 302 GPIOCHIP_IRQ_RESOURCE_HELPERS, 303}; 304 305static void wpcm450_gpio_irqhandler(struct irq_desc *desc) 306{ 307 struct wpcm450_gpio *gpio = gpiochip_get_data(irq_desc_get_handler_data(desc)); 308 struct wpcm450_pinctrl *pctrl = gpio->pctrl; 309 struct irq_chip *chip = irq_desc_get_chip(desc); 310 unsigned long pending; 311 unsigned long flags; 312 unsigned long ours; 313 unsigned int bit; 314 315 ours = GENMASK(gpio->bank->num_irqs - 1, 0) << gpio->bank->first_irq_bit; 316 317 raw_spin_lock_irqsave(&pctrl->lock, flags); 318 319 pending = ioread32(pctrl->gpio_base + WPCM450_GPEVST); 320 pending &= ioread32(pctrl->gpio_base + WPCM450_GPEVEN); 321 pending &= ours; 322 323 raw_spin_unlock_irqrestore(&pctrl->lock, flags); 324 325 if (pending & pctrl->both_edges) 326 wpcm450_gpio_fix_evpol(gpio, pending & pctrl->both_edges); 327 328 chained_irq_enter(chip, desc); 329 for_each_set_bit(bit, &pending, 32) { 330 int offset = wpcm450_irq_bitnum_to_gpio(gpio, bit); 331 332 generic_handle_domain_irq(gpio->gc.irq.domain, offset); 333 } 334 chained_irq_exit(chip, desc); 335} 336 337static int smb0_pins[] = { 115, 114 }; 338static int smb1_pins[] = { 117, 116 }; 339static int smb2_pins[] = { 119, 118 }; 340static int smb3_pins[] = { 30, 31 }; 341static int smb4_pins[] = { 28, 29 }; 342static int smb5_pins[] = { 26, 27 }; 343 344static int scs1_pins[] = { 32 }; 345static int scs2_pins[] = { 33 }; 346static int scs3_pins[] = { 34 }; 347 348static int bsp_pins[] = { 41, 42 }; 349static int hsp1_pins[] = { 43, 44, 45, 46, 47, 61, 62, 63 }; 350static int hsp2_pins[] = { 48, 49, 50, 51, 52, 53, 54, 55 }; 351 352static int r1err_pins[] = { 56 }; 353static int r1md_pins[] = { 57, 58 }; 354static int rmii2_pins[] = { 84, 85, 86, 87, 88, 89 }; 355static int r2err_pins[] = { 90 }; 356static int r2md_pins[] = { 91, 92 }; 357 358static int kbcc_pins[] = { 94, 93 }; 359static int clko_pins[] = { 96 }; 360static int smi_pins[] = { 97 }; 361static int uinc_pins[] = { 19 }; 362static int mben_pins[] = {}; 363 364static int gspi_pins[] = { 12, 13, 14, 15 }; 365static int sspi_pins[] = { 12, 13, 14, 15 }; 366 367static int xcs1_pins[] = { 35 }; 368static int xcs2_pins[] = { 36 }; 369 370static int sdio_pins[] = { 7, 22, 43, 44, 45, 46, 47, 60 }; 371 372static int fi0_pins[] = { 64 }; 373static int fi1_pins[] = { 65 }; 374static int fi2_pins[] = { 66 }; 375static int fi3_pins[] = { 67 }; 376static int fi4_pins[] = { 68 }; 377static int fi5_pins[] = { 69 }; 378static int fi6_pins[] = { 70 }; 379static int fi7_pins[] = { 71 }; 380static int fi8_pins[] = { 72 }; 381static int fi9_pins[] = { 73 }; 382static int fi10_pins[] = { 74 }; 383static int fi11_pins[] = { 75 }; 384static int fi12_pins[] = { 76 }; 385static int fi13_pins[] = { 77 }; 386static int fi14_pins[] = { 78 }; 387static int fi15_pins[] = { 79 }; 388 389static int pwm0_pins[] = { 80 }; 390static int pwm1_pins[] = { 81 }; 391static int pwm2_pins[] = { 82 }; 392static int pwm3_pins[] = { 83 }; 393static int pwm4_pins[] = { 20 }; 394static int pwm5_pins[] = { 21 }; 395static int pwm6_pins[] = { 16 }; 396static int pwm7_pins[] = { 17 }; 397 398static int hg0_pins[] = { 20 }; 399static int hg1_pins[] = { 21 }; 400static int hg2_pins[] = { 22 }; 401static int hg3_pins[] = { 23 }; 402static int hg4_pins[] = { 24 }; 403static int hg5_pins[] = { 25 }; 404static int hg6_pins[] = { 59 }; 405static int hg7_pins[] = { 60 }; 406 407#define WPCM450_GRPS \ 408 WPCM450_GRP(smb3), \ 409 WPCM450_GRP(smb4), \ 410 WPCM450_GRP(smb5), \ 411 WPCM450_GRP(scs1), \ 412 WPCM450_GRP(scs2), \ 413 WPCM450_GRP(scs3), \ 414 WPCM450_GRP(smb0), \ 415 WPCM450_GRP(smb1), \ 416 WPCM450_GRP(smb2), \ 417 WPCM450_GRP(bsp), \ 418 WPCM450_GRP(hsp1), \ 419 WPCM450_GRP(hsp2), \ 420 WPCM450_GRP(r1err), \ 421 WPCM450_GRP(r1md), \ 422 WPCM450_GRP(rmii2), \ 423 WPCM450_GRP(r2err), \ 424 WPCM450_GRP(r2md), \ 425 WPCM450_GRP(kbcc), \ 426 WPCM450_GRP(clko), \ 427 WPCM450_GRP(smi), \ 428 WPCM450_GRP(uinc), \ 429 WPCM450_GRP(gspi), \ 430 WPCM450_GRP(mben), \ 431 WPCM450_GRP(xcs2), \ 432 WPCM450_GRP(xcs1), \ 433 WPCM450_GRP(sdio), \ 434 WPCM450_GRP(sspi), \ 435 WPCM450_GRP(fi0), \ 436 WPCM450_GRP(fi1), \ 437 WPCM450_GRP(fi2), \ 438 WPCM450_GRP(fi3), \ 439 WPCM450_GRP(fi4), \ 440 WPCM450_GRP(fi5), \ 441 WPCM450_GRP(fi6), \ 442 WPCM450_GRP(fi7), \ 443 WPCM450_GRP(fi8), \ 444 WPCM450_GRP(fi9), \ 445 WPCM450_GRP(fi10), \ 446 WPCM450_GRP(fi11), \ 447 WPCM450_GRP(fi12), \ 448 WPCM450_GRP(fi13), \ 449 WPCM450_GRP(fi14), \ 450 WPCM450_GRP(fi15), \ 451 WPCM450_GRP(pwm0), \ 452 WPCM450_GRP(pwm1), \ 453 WPCM450_GRP(pwm2), \ 454 WPCM450_GRP(pwm3), \ 455 WPCM450_GRP(pwm4), \ 456 WPCM450_GRP(pwm5), \ 457 WPCM450_GRP(pwm6), \ 458 WPCM450_GRP(pwm7), \ 459 WPCM450_GRP(hg0), \ 460 WPCM450_GRP(hg1), \ 461 WPCM450_GRP(hg2), \ 462 WPCM450_GRP(hg3), \ 463 WPCM450_GRP(hg4), \ 464 WPCM450_GRP(hg5), \ 465 WPCM450_GRP(hg6), \ 466 WPCM450_GRP(hg7), \ 467 468enum { 469#define WPCM450_GRP(x) fn_ ## x 470 WPCM450_GRPS 471 /* add placeholder for none/gpio */ 472 WPCM450_GRP(gpio), 473 WPCM450_GRP(none), 474#undef WPCM450_GRP 475}; 476 477static struct group_desc wpcm450_groups[] = { 478#define WPCM450_GRP(x) { .name = #x, .pins = x ## _pins, \ 479 .num_pins = ARRAY_SIZE(x ## _pins) } 480 WPCM450_GRPS 481#undef WPCM450_GRP 482}; 483 484#define WPCM450_SFUNC(a) WPCM450_FUNC(a, #a) 485#define WPCM450_FUNC(a, b...) static const char *a ## _grp[] = { b } 486#define WPCM450_MKFUNC(nm) { .name = #nm, .ngroups = ARRAY_SIZE(nm ## _grp), \ 487 .groups = nm ## _grp } 488struct wpcm450_func { 489 const char *name; 490 const unsigned int ngroups; 491 const char *const *groups; 492}; 493 494WPCM450_SFUNC(smb3); 495WPCM450_SFUNC(smb4); 496WPCM450_SFUNC(smb5); 497WPCM450_SFUNC(scs1); 498WPCM450_SFUNC(scs2); 499WPCM450_SFUNC(scs3); 500WPCM450_SFUNC(smb0); 501WPCM450_SFUNC(smb1); 502WPCM450_SFUNC(smb2); 503WPCM450_SFUNC(bsp); 504WPCM450_SFUNC(hsp1); 505WPCM450_SFUNC(hsp2); 506WPCM450_SFUNC(r1err); 507WPCM450_SFUNC(r1md); 508WPCM450_SFUNC(rmii2); 509WPCM450_SFUNC(r2err); 510WPCM450_SFUNC(r2md); 511WPCM450_SFUNC(kbcc); 512WPCM450_SFUNC(clko); 513WPCM450_SFUNC(smi); 514WPCM450_SFUNC(uinc); 515WPCM450_SFUNC(gspi); 516WPCM450_SFUNC(mben); 517WPCM450_SFUNC(xcs2); 518WPCM450_SFUNC(xcs1); 519WPCM450_SFUNC(sdio); 520WPCM450_SFUNC(sspi); 521WPCM450_SFUNC(fi0); 522WPCM450_SFUNC(fi1); 523WPCM450_SFUNC(fi2); 524WPCM450_SFUNC(fi3); 525WPCM450_SFUNC(fi4); 526WPCM450_SFUNC(fi5); 527WPCM450_SFUNC(fi6); 528WPCM450_SFUNC(fi7); 529WPCM450_SFUNC(fi8); 530WPCM450_SFUNC(fi9); 531WPCM450_SFUNC(fi10); 532WPCM450_SFUNC(fi11); 533WPCM450_SFUNC(fi12); 534WPCM450_SFUNC(fi13); 535WPCM450_SFUNC(fi14); 536WPCM450_SFUNC(fi15); 537WPCM450_SFUNC(pwm0); 538WPCM450_SFUNC(pwm1); 539WPCM450_SFUNC(pwm2); 540WPCM450_SFUNC(pwm3); 541WPCM450_SFUNC(pwm4); 542WPCM450_SFUNC(pwm5); 543WPCM450_SFUNC(pwm6); 544WPCM450_SFUNC(pwm7); 545WPCM450_SFUNC(hg0); 546WPCM450_SFUNC(hg1); 547WPCM450_SFUNC(hg2); 548WPCM450_SFUNC(hg3); 549WPCM450_SFUNC(hg4); 550WPCM450_SFUNC(hg5); 551WPCM450_SFUNC(hg6); 552WPCM450_SFUNC(hg7); 553 554#define WPCM450_GRP(x) #x 555WPCM450_FUNC(gpio, WPCM450_GRPS); 556#undef WPCM450_GRP 557 558/* Function names */ 559static struct wpcm450_func wpcm450_funcs[] = { 560 WPCM450_MKFUNC(smb3), 561 WPCM450_MKFUNC(smb4), 562 WPCM450_MKFUNC(smb5), 563 WPCM450_MKFUNC(scs1), 564 WPCM450_MKFUNC(scs2), 565 WPCM450_MKFUNC(scs3), 566 WPCM450_MKFUNC(smb0), 567 WPCM450_MKFUNC(smb1), 568 WPCM450_MKFUNC(smb2), 569 WPCM450_MKFUNC(bsp), 570 WPCM450_MKFUNC(hsp1), 571 WPCM450_MKFUNC(hsp2), 572 WPCM450_MKFUNC(r1err), 573 WPCM450_MKFUNC(r1md), 574 WPCM450_MKFUNC(rmii2), 575 WPCM450_MKFUNC(r2err), 576 WPCM450_MKFUNC(r2md), 577 WPCM450_MKFUNC(kbcc), 578 WPCM450_MKFUNC(clko), 579 WPCM450_MKFUNC(smi), 580 WPCM450_MKFUNC(uinc), 581 WPCM450_MKFUNC(gspi), 582 WPCM450_MKFUNC(mben), 583 WPCM450_MKFUNC(xcs2), 584 WPCM450_MKFUNC(xcs1), 585 WPCM450_MKFUNC(sdio), 586 WPCM450_MKFUNC(sspi), 587 WPCM450_MKFUNC(fi0), 588 WPCM450_MKFUNC(fi1), 589 WPCM450_MKFUNC(fi2), 590 WPCM450_MKFUNC(fi3), 591 WPCM450_MKFUNC(fi4), 592 WPCM450_MKFUNC(fi5), 593 WPCM450_MKFUNC(fi6), 594 WPCM450_MKFUNC(fi7), 595 WPCM450_MKFUNC(fi8), 596 WPCM450_MKFUNC(fi9), 597 WPCM450_MKFUNC(fi10), 598 WPCM450_MKFUNC(fi11), 599 WPCM450_MKFUNC(fi12), 600 WPCM450_MKFUNC(fi13), 601 WPCM450_MKFUNC(fi14), 602 WPCM450_MKFUNC(fi15), 603 WPCM450_MKFUNC(pwm0), 604 WPCM450_MKFUNC(pwm1), 605 WPCM450_MKFUNC(pwm2), 606 WPCM450_MKFUNC(pwm3), 607 WPCM450_MKFUNC(pwm4), 608 WPCM450_MKFUNC(pwm5), 609 WPCM450_MKFUNC(pwm6), 610 WPCM450_MKFUNC(pwm7), 611 WPCM450_MKFUNC(hg0), 612 WPCM450_MKFUNC(hg1), 613 WPCM450_MKFUNC(hg2), 614 WPCM450_MKFUNC(hg3), 615 WPCM450_MKFUNC(hg4), 616 WPCM450_MKFUNC(hg5), 617 WPCM450_MKFUNC(hg6), 618 WPCM450_MKFUNC(hg7), 619 WPCM450_MKFUNC(gpio), 620}; 621 622#define WPCM450_PINCFG(a, b, c, d, e, f, g) \ 623 [a] = { .fn0 = fn_ ## b, .reg0 = WPCM450_GCR_ ## c, .bit0 = d, \ 624 .fn1 = fn_ ## e, .reg1 = WPCM450_GCR_ ## f, .bit1 = g } 625 626struct wpcm450_pincfg { 627 int fn0, reg0, bit0; 628 int fn1, reg1, bit1; 629}; 630 631/* Add this value to bit0 or bit1 to indicate that the MFSEL bit is inverted */ 632#define INV BIT(5) 633 634static const struct wpcm450_pincfg pincfg[] = { 635 /* PIN FUNCTION 1 FUNCTION 2 */ 636 WPCM450_PINCFG(0, none, NONE, 0, none, NONE, 0), 637 WPCM450_PINCFG(1, none, NONE, 0, none, NONE, 0), 638 WPCM450_PINCFG(2, none, NONE, 0, none, NONE, 0), 639 WPCM450_PINCFG(3, none, NONE, 0, none, NONE, 0), 640 WPCM450_PINCFG(4, none, NONE, 0, none, NONE, 0), 641 WPCM450_PINCFG(5, none, NONE, 0, none, NONE, 0), 642 WPCM450_PINCFG(6, none, NONE, 0, none, NONE, 0), 643 WPCM450_PINCFG(7, none, NONE, 0, sdio, MFSEL1, 30), 644 WPCM450_PINCFG(8, none, NONE, 0, none, NONE, 0), 645 WPCM450_PINCFG(9, none, NONE, 0, none, NONE, 0), 646 WPCM450_PINCFG(10, none, NONE, 0, none, NONE, 0), 647 WPCM450_PINCFG(11, none, NONE, 0, none, NONE, 0), 648 WPCM450_PINCFG(12, gspi, MFSEL1, 24, sspi, MFSEL1, 31), 649 WPCM450_PINCFG(13, gspi, MFSEL1, 24, sspi, MFSEL1, 31), 650 WPCM450_PINCFG(14, gspi, MFSEL1, 24, sspi, MFSEL1, 31), 651 WPCM450_PINCFG(15, gspi, MFSEL1, 24, sspi, MFSEL1, 31), 652 WPCM450_PINCFG(16, none, NONE, 0, pwm6, MFSEL2, 22), 653 WPCM450_PINCFG(17, none, NONE, 0, pwm7, MFSEL2, 23), 654 WPCM450_PINCFG(18, none, NONE, 0, none, NONE, 0), 655 WPCM450_PINCFG(19, uinc, MFSEL1, 23, none, NONE, 0), 656 WPCM450_PINCFG(20, hg0, MFSEL2, 24, pwm4, MFSEL2, 20), 657 WPCM450_PINCFG(21, hg1, MFSEL2, 25, pwm5, MFSEL2, 21), 658 WPCM450_PINCFG(22, hg2, MFSEL2, 26, none, NONE, 0), 659 WPCM450_PINCFG(23, hg3, MFSEL2, 27, none, NONE, 0), 660 WPCM450_PINCFG(24, hg4, MFSEL2, 28, none, NONE, 0), 661 WPCM450_PINCFG(25, hg5, MFSEL2, 29, none, NONE, 0), 662 WPCM450_PINCFG(26, smb5, MFSEL1, 2, none, NONE, 0), 663 WPCM450_PINCFG(27, smb5, MFSEL1, 2, none, NONE, 0), 664 WPCM450_PINCFG(28, smb4, MFSEL1, 1, none, NONE, 0), 665 WPCM450_PINCFG(29, smb4, MFSEL1, 1, none, NONE, 0), 666 WPCM450_PINCFG(30, smb3, MFSEL1, 0, none, NONE, 0), 667 WPCM450_PINCFG(31, smb3, MFSEL1, 0, none, NONE, 0), 668 669 WPCM450_PINCFG(32, scs1, MFSEL1, 3, none, NONE, 0), 670 WPCM450_PINCFG(33, scs2, MFSEL1, 4, none, NONE, 0), 671 WPCM450_PINCFG(34, scs3, MFSEL1, 5 | INV, none, NONE, 0), 672 WPCM450_PINCFG(35, xcs1, MFSEL1, 29, none, NONE, 0), 673 WPCM450_PINCFG(36, xcs2, MFSEL1, 28, none, NONE, 0), 674 WPCM450_PINCFG(37, none, NONE, 0, none, NONE, 0), /* DVO */ 675 WPCM450_PINCFG(38, none, NONE, 0, none, NONE, 0), /* DVO */ 676 WPCM450_PINCFG(39, none, NONE, 0, none, NONE, 0), /* DVO */ 677 WPCM450_PINCFG(40, none, NONE, 0, none, NONE, 0), /* DVO */ 678 WPCM450_PINCFG(41, bsp, MFSEL1, 9, none, NONE, 0), 679 WPCM450_PINCFG(42, bsp, MFSEL1, 9, none, NONE, 0), 680 WPCM450_PINCFG(43, hsp1, MFSEL1, 10, sdio, MFSEL1, 30), 681 WPCM450_PINCFG(44, hsp1, MFSEL1, 10, sdio, MFSEL1, 30), 682 WPCM450_PINCFG(45, hsp1, MFSEL1, 10, sdio, MFSEL1, 30), 683 WPCM450_PINCFG(46, hsp1, MFSEL1, 10, sdio, MFSEL1, 30), 684 WPCM450_PINCFG(47, hsp1, MFSEL1, 10, sdio, MFSEL1, 30), 685 WPCM450_PINCFG(48, hsp2, MFSEL1, 11, none, NONE, 0), 686 WPCM450_PINCFG(49, hsp2, MFSEL1, 11, none, NONE, 0), 687 WPCM450_PINCFG(50, hsp2, MFSEL1, 11, none, NONE, 0), 688 WPCM450_PINCFG(51, hsp2, MFSEL1, 11, none, NONE, 0), 689 WPCM450_PINCFG(52, hsp2, MFSEL1, 11, none, NONE, 0), 690 WPCM450_PINCFG(53, hsp2, MFSEL1, 11, none, NONE, 0), 691 WPCM450_PINCFG(54, hsp2, MFSEL1, 11, none, NONE, 0), 692 WPCM450_PINCFG(55, hsp2, MFSEL1, 11, none, NONE, 0), 693 WPCM450_PINCFG(56, r1err, MFSEL1, 12, none, NONE, 0), 694 WPCM450_PINCFG(57, r1md, MFSEL1, 13, none, NONE, 0), 695 WPCM450_PINCFG(58, r1md, MFSEL1, 13, none, NONE, 0), 696 WPCM450_PINCFG(59, hg6, MFSEL2, 30, none, NONE, 0), 697 WPCM450_PINCFG(60, hg7, MFSEL2, 31, sdio, MFSEL1, 30), 698 WPCM450_PINCFG(61, hsp1, MFSEL1, 10, none, NONE, 0), 699 WPCM450_PINCFG(62, hsp1, MFSEL1, 10, none, NONE, 0), 700 WPCM450_PINCFG(63, hsp1, MFSEL1, 10, none, NONE, 0), 701 702 WPCM450_PINCFG(64, fi0, MFSEL2, 0, none, NONE, 0), 703 WPCM450_PINCFG(65, fi1, MFSEL2, 1, none, NONE, 0), 704 WPCM450_PINCFG(66, fi2, MFSEL2, 2, none, NONE, 0), 705 WPCM450_PINCFG(67, fi3, MFSEL2, 3, none, NONE, 0), 706 WPCM450_PINCFG(68, fi4, MFSEL2, 4, none, NONE, 0), 707 WPCM450_PINCFG(69, fi5, MFSEL2, 5, none, NONE, 0), 708 WPCM450_PINCFG(70, fi6, MFSEL2, 6, none, NONE, 0), 709 WPCM450_PINCFG(71, fi7, MFSEL2, 7, none, NONE, 0), 710 WPCM450_PINCFG(72, fi8, MFSEL2, 8, none, NONE, 0), 711 WPCM450_PINCFG(73, fi9, MFSEL2, 9, none, NONE, 0), 712 WPCM450_PINCFG(74, fi10, MFSEL2, 10, none, NONE, 0), 713 WPCM450_PINCFG(75, fi11, MFSEL2, 11, none, NONE, 0), 714 WPCM450_PINCFG(76, fi12, MFSEL2, 12, none, NONE, 0), 715 WPCM450_PINCFG(77, fi13, MFSEL2, 13, none, NONE, 0), 716 WPCM450_PINCFG(78, fi14, MFSEL2, 14, none, NONE, 0), 717 WPCM450_PINCFG(79, fi15, MFSEL2, 15, none, NONE, 0), 718 WPCM450_PINCFG(80, pwm0, MFSEL2, 16, none, NONE, 0), 719 WPCM450_PINCFG(81, pwm1, MFSEL2, 17, none, NONE, 0), 720 WPCM450_PINCFG(82, pwm2, MFSEL2, 18, none, NONE, 0), 721 WPCM450_PINCFG(83, pwm3, MFSEL2, 19, none, NONE, 0), 722 WPCM450_PINCFG(84, rmii2, MFSEL1, 14, none, NONE, 0), 723 WPCM450_PINCFG(85, rmii2, MFSEL1, 14, none, NONE, 0), 724 WPCM450_PINCFG(86, rmii2, MFSEL1, 14, none, NONE, 0), 725 WPCM450_PINCFG(87, rmii2, MFSEL1, 14, none, NONE, 0), 726 WPCM450_PINCFG(88, rmii2, MFSEL1, 14, none, NONE, 0), 727 WPCM450_PINCFG(89, rmii2, MFSEL1, 14, none, NONE, 0), 728 WPCM450_PINCFG(90, r2err, MFSEL1, 15, none, NONE, 0), 729 WPCM450_PINCFG(91, r2md, MFSEL1, 16, none, NONE, 0), 730 WPCM450_PINCFG(92, r2md, MFSEL1, 16, none, NONE, 0), 731 WPCM450_PINCFG(93, kbcc, MFSEL1, 17 | INV, none, NONE, 0), 732 WPCM450_PINCFG(94, kbcc, MFSEL1, 17 | INV, none, NONE, 0), 733 WPCM450_PINCFG(95, none, NONE, 0, none, NONE, 0), 734 735 WPCM450_PINCFG(96, none, NONE, 0, none, NONE, 0), 736 WPCM450_PINCFG(97, none, NONE, 0, none, NONE, 0), 737 WPCM450_PINCFG(98, none, NONE, 0, none, NONE, 0), 738 WPCM450_PINCFG(99, none, NONE, 0, none, NONE, 0), 739 WPCM450_PINCFG(100, none, NONE, 0, none, NONE, 0), 740 WPCM450_PINCFG(101, none, NONE, 0, none, NONE, 0), 741 WPCM450_PINCFG(102, none, NONE, 0, none, NONE, 0), 742 WPCM450_PINCFG(103, none, NONE, 0, none, NONE, 0), 743 WPCM450_PINCFG(104, none, NONE, 0, none, NONE, 0), 744 WPCM450_PINCFG(105, none, NONE, 0, none, NONE, 0), 745 WPCM450_PINCFG(106, none, NONE, 0, none, NONE, 0), 746 WPCM450_PINCFG(107, none, NONE, 0, none, NONE, 0), 747 WPCM450_PINCFG(108, none, NONE, 0, none, NONE, 0), /* DVO */ 748 WPCM450_PINCFG(109, none, NONE, 0, none, NONE, 0), /* DVO */ 749 WPCM450_PINCFG(110, none, NONE, 0, none, NONE, 0), /* DVO */ 750 WPCM450_PINCFG(111, none, NONE, 0, none, NONE, 0), /* DVO */ 751 WPCM450_PINCFG(112, none, NONE, 0, none, NONE, 0), /* DVO */ 752 WPCM450_PINCFG(113, none, NONE, 0, none, NONE, 0), /* DVO */ 753 WPCM450_PINCFG(114, smb0, MFSEL1, 6, none, NONE, 0), 754 WPCM450_PINCFG(115, smb0, MFSEL1, 6, none, NONE, 0), 755 WPCM450_PINCFG(116, smb1, MFSEL1, 7, none, NONE, 0), 756 WPCM450_PINCFG(117, smb1, MFSEL1, 7, none, NONE, 0), 757 WPCM450_PINCFG(118, smb2, MFSEL1, 8, none, NONE, 0), 758 WPCM450_PINCFG(119, smb2, MFSEL1, 8, none, NONE, 0), 759 WPCM450_PINCFG(120, none, NONE, 0, none, NONE, 0), /* DVO */ 760 WPCM450_PINCFG(121, none, NONE, 0, none, NONE, 0), /* DVO */ 761 WPCM450_PINCFG(122, none, NONE, 0, none, NONE, 0), /* DVO */ 762 WPCM450_PINCFG(123, none, NONE, 0, none, NONE, 0), /* DVO */ 763 WPCM450_PINCFG(124, none, NONE, 0, none, NONE, 0), /* DVO */ 764 WPCM450_PINCFG(125, none, NONE, 0, none, NONE, 0), /* DVO */ 765 WPCM450_PINCFG(126, none, NONE, 0, none, NONE, 0), /* DVO */ 766 WPCM450_PINCFG(127, none, NONE, 0, none, NONE, 0), /* DVO */ 767}; 768 769#define WPCM450_PIN(n) PINCTRL_PIN(n, "gpio" #n) 770 771static const struct pinctrl_pin_desc wpcm450_pins[] = { 772 WPCM450_PIN(0), WPCM450_PIN(1), WPCM450_PIN(2), WPCM450_PIN(3), 773 WPCM450_PIN(4), WPCM450_PIN(5), WPCM450_PIN(6), WPCM450_PIN(7), 774 WPCM450_PIN(8), WPCM450_PIN(9), WPCM450_PIN(10), WPCM450_PIN(11), 775 WPCM450_PIN(12), WPCM450_PIN(13), WPCM450_PIN(14), WPCM450_PIN(15), 776 WPCM450_PIN(16), WPCM450_PIN(17), WPCM450_PIN(18), WPCM450_PIN(19), 777 WPCM450_PIN(20), WPCM450_PIN(21), WPCM450_PIN(22), WPCM450_PIN(23), 778 WPCM450_PIN(24), WPCM450_PIN(25), WPCM450_PIN(26), WPCM450_PIN(27), 779 WPCM450_PIN(28), WPCM450_PIN(29), WPCM450_PIN(30), WPCM450_PIN(31), 780 WPCM450_PIN(32), WPCM450_PIN(33), WPCM450_PIN(34), WPCM450_PIN(35), 781 WPCM450_PIN(36), WPCM450_PIN(37), WPCM450_PIN(38), WPCM450_PIN(39), 782 WPCM450_PIN(40), WPCM450_PIN(41), WPCM450_PIN(42), WPCM450_PIN(43), 783 WPCM450_PIN(44), WPCM450_PIN(45), WPCM450_PIN(46), WPCM450_PIN(47), 784 WPCM450_PIN(48), WPCM450_PIN(49), WPCM450_PIN(50), WPCM450_PIN(51), 785 WPCM450_PIN(52), WPCM450_PIN(53), WPCM450_PIN(54), WPCM450_PIN(55), 786 WPCM450_PIN(56), WPCM450_PIN(57), WPCM450_PIN(58), WPCM450_PIN(59), 787 WPCM450_PIN(60), WPCM450_PIN(61), WPCM450_PIN(62), WPCM450_PIN(63), 788 WPCM450_PIN(64), WPCM450_PIN(65), WPCM450_PIN(66), WPCM450_PIN(67), 789 WPCM450_PIN(68), WPCM450_PIN(69), WPCM450_PIN(70), WPCM450_PIN(71), 790 WPCM450_PIN(72), WPCM450_PIN(73), WPCM450_PIN(74), WPCM450_PIN(75), 791 WPCM450_PIN(76), WPCM450_PIN(77), WPCM450_PIN(78), WPCM450_PIN(79), 792 WPCM450_PIN(80), WPCM450_PIN(81), WPCM450_PIN(82), WPCM450_PIN(83), 793 WPCM450_PIN(84), WPCM450_PIN(85), WPCM450_PIN(86), WPCM450_PIN(87), 794 WPCM450_PIN(88), WPCM450_PIN(89), WPCM450_PIN(90), WPCM450_PIN(91), 795 WPCM450_PIN(92), WPCM450_PIN(93), WPCM450_PIN(94), WPCM450_PIN(95), 796 WPCM450_PIN(96), WPCM450_PIN(97), WPCM450_PIN(98), WPCM450_PIN(99), 797 WPCM450_PIN(100), WPCM450_PIN(101), WPCM450_PIN(102), WPCM450_PIN(103), 798 WPCM450_PIN(104), WPCM450_PIN(105), WPCM450_PIN(106), WPCM450_PIN(107), 799 WPCM450_PIN(108), WPCM450_PIN(109), WPCM450_PIN(110), WPCM450_PIN(111), 800 WPCM450_PIN(112), WPCM450_PIN(113), WPCM450_PIN(114), WPCM450_PIN(115), 801 WPCM450_PIN(116), WPCM450_PIN(117), WPCM450_PIN(118), WPCM450_PIN(119), 802 WPCM450_PIN(120), WPCM450_PIN(121), WPCM450_PIN(122), WPCM450_PIN(123), 803 WPCM450_PIN(124), WPCM450_PIN(125), WPCM450_PIN(126), WPCM450_PIN(127), 804}; 805 806/* Helper function to update MFSEL field according to the selected function */ 807static void wpcm450_update_mfsel(struct regmap *gcr_regmap, int reg, int bit, int fn, int fn_selected) 808{ 809 bool value = (fn == fn_selected); 810 811 if (bit & INV) { 812 value = !value; 813 bit &= ~INV; 814 } 815 816 regmap_update_bits(gcr_regmap, reg, BIT(bit), value ? BIT(bit) : 0); 817} 818 819/* Enable mode in pin group */ 820static void wpcm450_setfunc(struct regmap *gcr_regmap, const unsigned int *pin, 821 int npins, int func) 822{ 823 const struct wpcm450_pincfg *cfg; 824 int i; 825 826 for (i = 0; i < npins; i++) { 827 cfg = &pincfg[pin[i]]; 828 if (func == fn_gpio || cfg->fn0 == func || cfg->fn1 == func) { 829 if (cfg->reg0) 830 wpcm450_update_mfsel(gcr_regmap, cfg->reg0, 831 cfg->bit0, cfg->fn0, func); 832 if (cfg->reg1) 833 wpcm450_update_mfsel(gcr_regmap, cfg->reg1, 834 cfg->bit1, cfg->fn1, func); 835 } 836 } 837} 838 839static int wpcm450_get_groups_count(struct pinctrl_dev *pctldev) 840{ 841 return ARRAY_SIZE(wpcm450_groups); 842} 843 844static const char *wpcm450_get_group_name(struct pinctrl_dev *pctldev, 845 unsigned int selector) 846{ 847 return wpcm450_groups[selector].name; 848} 849 850static int wpcm450_get_group_pins(struct pinctrl_dev *pctldev, 851 unsigned int selector, 852 const unsigned int **pins, 853 unsigned int *npins) 854{ 855 *npins = wpcm450_groups[selector].num_pins; 856 *pins = wpcm450_groups[selector].pins; 857 858 return 0; 859} 860 861static int wpcm450_dt_node_to_map(struct pinctrl_dev *pctldev, 862 struct device_node *np_config, 863 struct pinctrl_map **map, 864 u32 *num_maps) 865{ 866 return pinconf_generic_dt_node_to_map(pctldev, np_config, 867 map, num_maps, 868 PIN_MAP_TYPE_INVALID); 869} 870 871static void wpcm450_dt_free_map(struct pinctrl_dev *pctldev, 872 struct pinctrl_map *map, u32 num_maps) 873{ 874 kfree(map); 875} 876 877static const struct pinctrl_ops wpcm450_pinctrl_ops = { 878 .get_groups_count = wpcm450_get_groups_count, 879 .get_group_name = wpcm450_get_group_name, 880 .get_group_pins = wpcm450_get_group_pins, 881 .dt_node_to_map = wpcm450_dt_node_to_map, 882 .dt_free_map = wpcm450_dt_free_map, 883}; 884 885static int wpcm450_get_functions_count(struct pinctrl_dev *pctldev) 886{ 887 return ARRAY_SIZE(wpcm450_funcs); 888} 889 890static const char *wpcm450_get_function_name(struct pinctrl_dev *pctldev, 891 unsigned int function) 892{ 893 return wpcm450_funcs[function].name; 894} 895 896static int wpcm450_get_function_groups(struct pinctrl_dev *pctldev, 897 unsigned int function, 898 const char * const **groups, 899 unsigned int * const ngroups) 900{ 901 *ngroups = wpcm450_funcs[function].ngroups; 902 *groups = wpcm450_funcs[function].groups; 903 904 return 0; 905} 906 907static int wpcm450_pinmux_set_mux(struct pinctrl_dev *pctldev, 908 unsigned int function, 909 unsigned int group) 910{ 911 struct wpcm450_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); 912 913 wpcm450_setfunc(pctrl->gcr_regmap, wpcm450_groups[group].pins, 914 wpcm450_groups[group].num_pins, function); 915 916 return 0; 917} 918 919static const struct pinmux_ops wpcm450_pinmux_ops = { 920 .get_functions_count = wpcm450_get_functions_count, 921 .get_function_name = wpcm450_get_function_name, 922 .get_function_groups = wpcm450_get_function_groups, 923 .set_mux = wpcm450_pinmux_set_mux, 924}; 925 926static int debounce_bitnum(int gpio) 927{ 928 if (gpio >= 0 && gpio < 16) 929 return gpio; 930 return -EINVAL; 931} 932 933static int wpcm450_config_get(struct pinctrl_dev *pctldev, unsigned int pin, 934 unsigned long *config) 935{ 936 struct wpcm450_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); 937 enum pin_config_param param = pinconf_to_config_param(*config); 938 unsigned long flags; 939 int bit; 940 u32 reg; 941 942 switch (param) { 943 case PIN_CONFIG_INPUT_DEBOUNCE: 944 bit = debounce_bitnum(pin); 945 if (bit < 0) 946 return bit; 947 948 raw_spin_lock_irqsave(&pctrl->lock, flags); 949 reg = ioread32(pctrl->gpio_base + WPCM450_GPEVDBNC); 950 raw_spin_unlock_irqrestore(&pctrl->lock, flags); 951 952 *config = pinconf_to_config_packed(param, !!(reg & BIT(bit))); 953 return 0; 954 default: 955 return -ENOTSUPP; 956 } 957} 958 959static int wpcm450_config_set_one(struct wpcm450_pinctrl *pctrl, 960 unsigned int pin, unsigned long config) 961{ 962 enum pin_config_param param = pinconf_to_config_param(config); 963 unsigned long flags; 964 unsigned long reg; 965 int bit; 966 int arg; 967 968 switch (param) { 969 case PIN_CONFIG_INPUT_DEBOUNCE: 970 bit = debounce_bitnum(pin); 971 if (bit < 0) 972 return bit; 973 974 arg = pinconf_to_config_argument(config); 975 976 raw_spin_lock_irqsave(&pctrl->lock, flags); 977 reg = ioread32(pctrl->gpio_base + WPCM450_GPEVDBNC); 978 __assign_bit(bit, ®, arg); 979 iowrite32(reg, pctrl->gpio_base + WPCM450_GPEVDBNC); 980 raw_spin_unlock_irqrestore(&pctrl->lock, flags); 981 return 0; 982 default: 983 return -ENOTSUPP; 984 } 985} 986 987static int wpcm450_config_set(struct pinctrl_dev *pctldev, unsigned int pin, 988 unsigned long *configs, unsigned int num_configs) 989{ 990 struct wpcm450_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); 991 int ret; 992 993 while (num_configs--) { 994 ret = wpcm450_config_set_one(pctrl, pin, *configs++); 995 if (ret) 996 return ret; 997 } 998 999 return 0; 1000} 1001 1002static const struct pinconf_ops wpcm450_pinconf_ops = { 1003 .is_generic = true, 1004 .pin_config_get = wpcm450_config_get, 1005 .pin_config_set = wpcm450_config_set, 1006}; 1007 1008static struct pinctrl_desc wpcm450_pinctrl_desc = { 1009 .name = "wpcm450-pinctrl", 1010 .pins = wpcm450_pins, 1011 .npins = ARRAY_SIZE(wpcm450_pins), 1012 .pctlops = &wpcm450_pinctrl_ops, 1013 .pmxops = &wpcm450_pinmux_ops, 1014 .confops = &wpcm450_pinconf_ops, 1015 .owner = THIS_MODULE, 1016}; 1017 1018static int wpcm450_gpio_set_config(struct gpio_chip *chip, 1019 unsigned int offset, unsigned long config) 1020{ 1021 struct wpcm450_gpio *gpio = gpiochip_get_data(chip); 1022 1023 return wpcm450_config_set_one(gpio->pctrl, offset, config); 1024} 1025 1026static int wpcm450_gpio_add_pin_ranges(struct gpio_chip *chip) 1027{ 1028 struct wpcm450_gpio *gpio = gpiochip_get_data(chip); 1029 const struct wpcm450_bank *bank = gpio->bank; 1030 1031 return gpiochip_add_pin_range(&gpio->gc, dev_name(gpio->pctrl->dev), 1032 0, bank->base, bank->length); 1033} 1034 1035static int wpcm450_gpio_register(struct platform_device *pdev, 1036 struct wpcm450_pinctrl *pctrl) 1037{ 1038 struct device *dev = &pdev->dev; 1039 struct fwnode_handle *child; 1040 int ret; 1041 1042 pctrl->gpio_base = devm_platform_ioremap_resource(pdev, 0); 1043 if (IS_ERR(pctrl->gpio_base)) 1044 return dev_err_probe(dev, PTR_ERR(pctrl->gpio_base), 1045 "Resource fail for GPIO controller\n"); 1046 1047 device_for_each_child_node(dev, child) { 1048 void __iomem *dat = NULL; 1049 void __iomem *set = NULL; 1050 void __iomem *dirout = NULL; 1051 unsigned long flags = 0; 1052 const struct wpcm450_bank *bank; 1053 struct wpcm450_gpio *gpio; 1054 struct gpio_irq_chip *girq; 1055 u32 reg; 1056 int i; 1057 1058 if (!fwnode_property_read_bool(child, "gpio-controller")) 1059 continue; 1060 1061 ret = fwnode_property_read_u32(child, "reg", ®); 1062 if (ret < 0) 1063 return ret; 1064 1065 if (reg >= WPCM450_NUM_BANKS) 1066 return dev_err_probe(dev, -EINVAL, 1067 "GPIO index %d out of range!\n", reg); 1068 1069 gpio = &pctrl->gpio_bank[reg]; 1070 gpio->pctrl = pctrl; 1071 1072 bank = &wpcm450_banks[reg]; 1073 gpio->bank = bank; 1074 1075 dat = pctrl->gpio_base + bank->datain; 1076 if (bank->dataout) { 1077 set = pctrl->gpio_base + bank->dataout; 1078 dirout = pctrl->gpio_base + bank->cfg0; 1079 } else { 1080 flags = BGPIOF_NO_OUTPUT; 1081 } 1082 ret = bgpio_init(&gpio->gc, dev, 4, 1083 dat, set, NULL, dirout, NULL, flags); 1084 if (ret < 0) 1085 return dev_err_probe(dev, ret, "GPIO initialization failed\n"); 1086 1087 gpio->gc.ngpio = bank->length; 1088 gpio->gc.set_config = wpcm450_gpio_set_config; 1089 gpio->gc.fwnode = child; 1090 gpio->gc.add_pin_ranges = wpcm450_gpio_add_pin_ranges; 1091 1092 girq = &gpio->gc.irq; 1093 gpio_irq_chip_set_chip(girq, &wpcm450_gpio_irqchip); 1094 girq->parent_handler = wpcm450_gpio_irqhandler; 1095 girq->parents = devm_kcalloc(dev, WPCM450_NUM_GPIO_IRQS, 1096 sizeof(*girq->parents), GFP_KERNEL); 1097 if (!girq->parents) 1098 return -ENOMEM; 1099 girq->default_type = IRQ_TYPE_NONE; 1100 girq->handler = handle_bad_irq; 1101 1102 girq->num_parents = 0; 1103 for (i = 0; i < WPCM450_NUM_GPIO_IRQS; i++) { 1104 int irq; 1105 1106 irq = fwnode_irq_get(child, i); 1107 if (irq < 0) 1108 break; 1109 if (!irq) 1110 continue; 1111 1112 girq->parents[i] = irq; 1113 girq->num_parents++; 1114 } 1115 1116 ret = devm_gpiochip_add_data(dev, &gpio->gc, gpio); 1117 if (ret) 1118 return dev_err_probe(dev, ret, "Failed to add GPIO chip\n"); 1119 } 1120 1121 return 0; 1122} 1123 1124static int wpcm450_pinctrl_probe(struct platform_device *pdev) 1125{ 1126 struct device *dev = &pdev->dev; 1127 struct wpcm450_pinctrl *pctrl; 1128 int ret; 1129 1130 pctrl = devm_kzalloc(dev, sizeof(*pctrl), GFP_KERNEL); 1131 if (!pctrl) 1132 return -ENOMEM; 1133 1134 pctrl->dev = &pdev->dev; 1135 raw_spin_lock_init(&pctrl->lock); 1136 dev_set_drvdata(dev, pctrl); 1137 1138 pctrl->gcr_regmap = 1139 syscon_regmap_lookup_by_compatible("nuvoton,wpcm450-gcr"); 1140 if (IS_ERR(pctrl->gcr_regmap)) 1141 return dev_err_probe(dev, PTR_ERR(pctrl->gcr_regmap), 1142 "Failed to find nuvoton,wpcm450-gcr\n"); 1143 1144 pctrl->pctldev = devm_pinctrl_register(dev, 1145 &wpcm450_pinctrl_desc, pctrl); 1146 if (IS_ERR(pctrl->pctldev)) 1147 return dev_err_probe(dev, PTR_ERR(pctrl->pctldev), 1148 "Failed to register pinctrl device\n"); 1149 1150 ret = wpcm450_gpio_register(pdev, pctrl); 1151 if (ret < 0) 1152 return ret; 1153 1154 return 0; 1155} 1156 1157static const struct of_device_id wpcm450_pinctrl_match[] = { 1158 { .compatible = "nuvoton,wpcm450-pinctrl" }, 1159 { } 1160}; 1161MODULE_DEVICE_TABLE(of, wpcm450_pinctrl_match); 1162 1163static struct platform_driver wpcm450_pinctrl_driver = { 1164 .probe = wpcm450_pinctrl_probe, 1165 .driver = { 1166 .name = "wpcm450-pinctrl", 1167 .of_match_table = wpcm450_pinctrl_match, 1168 }, 1169}; 1170module_platform_driver(wpcm450_pinctrl_driver); 1171 1172MODULE_LICENSE("GPL v2"); 1173MODULE_AUTHOR("Jonathan Neuschäfer <j.neuschaefer@gmx.net>"); 1174MODULE_DESCRIPTION("Nuvoton WPCM450 Pinctrl and GPIO driver"); 1175