1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Intel Moorefield SoC pinctrl driver 4 * 5 * Copyright (C) 2022, Intel Corporation 6 * Author: Andy Shevchenko <andriy.shevchenko@linux.intel.com> 7 */ 8 9 #include <linux/bits.h> 10 #include <linux/err.h> 11 #include <linux/io.h> 12 #include <linux/module.h> 13 #include <linux/mod_devicetable.h> 14 #include <linux/platform_device.h> 15 #include <linux/seq_file.h> 16 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 "pinctrl-intel.h" 23 24 #define MOFLD_FAMILY_NR 64 25 #define MOFLD_FAMILY_LEN 0x400 26 27 #define SLEW_OFFSET 0x000 28 #define BUFCFG_OFFSET 0x100 29 #define MISC_OFFSET 0x300 30 31 #define BUFCFG_PINMODE_SHIFT 0 32 #define BUFCFG_PINMODE_MASK GENMASK(2, 0) 33 #define BUFCFG_PINMODE_GPIO 0 34 #define BUFCFG_PUPD_VAL_SHIFT 4 35 #define BUFCFG_PUPD_VAL_MASK GENMASK(5, 4) 36 #define BUFCFG_PUPD_VAL_2K 0 37 #define BUFCFG_PUPD_VAL_20K 1 38 #define BUFCFG_PUPD_VAL_50K 2 39 #define BUFCFG_PUPD_VAL_910 3 40 #define BUFCFG_PU_EN BIT(8) 41 #define BUFCFG_PD_EN BIT(9) 42 #define BUFCFG_Px_EN_MASK GENMASK(9, 8) 43 #define BUFCFG_SLEWSEL BIT(10) 44 #define BUFCFG_OVINEN BIT(12) 45 #define BUFCFG_OVINEN_EN BIT(13) 46 #define BUFCFG_OVINEN_MASK GENMASK(13, 12) 47 #define BUFCFG_OVOUTEN BIT(14) 48 #define BUFCFG_OVOUTEN_EN BIT(15) 49 #define BUFCFG_OVOUTEN_MASK GENMASK(15, 14) 50 #define BUFCFG_INDATAOV_VAL BIT(16) 51 #define BUFCFG_INDATAOV_EN BIT(17) 52 #define BUFCFG_INDATAOV_MASK GENMASK(17, 16) 53 #define BUFCFG_OUTDATAOV_VAL BIT(18) 54 #define BUFCFG_OUTDATAOV_EN BIT(19) 55 #define BUFCFG_OUTDATAOV_MASK GENMASK(19, 18) 56 #define BUFCFG_OD_EN BIT(21) 57 58 /** 59 * struct mofld_family - Intel pin family description 60 * @barno: MMIO BAR number where registers for this family reside 61 * @pin_base: Starting pin of pins in this family 62 * @npins: Number of pins in this family 63 * @protected: True if family is protected by access 64 * @regs: family specific common registers 65 */ 66 struct mofld_family { 67 unsigned int barno; 68 unsigned int pin_base; 69 size_t npins; 70 bool protected; 71 void __iomem *regs; 72 }; 73 74 #define MOFLD_FAMILY(b, s, e) \ 75 { \ 76 .barno = (b), \ 77 .pin_base = (s), \ 78 .npins = (e) - (s) + 1, \ 79 } 80 81 static const struct pinctrl_pin_desc mofld_pins[] = { 82 /* ULPI (13 pins) */ 83 PINCTRL_PIN(0, "GP101_ULPI_CLK"), 84 PINCTRL_PIN(1, "GP136_ULPI_D0"), 85 PINCTRL_PIN(2, "GP143_ULPI_D1"), 86 PINCTRL_PIN(3, "GP144_ULPI_D2"), 87 PINCTRL_PIN(4, "GP145_ULPI_D3"), 88 PINCTRL_PIN(5, "GP146_ULPI_D4"), 89 PINCTRL_PIN(6, "GP147_ULPI_D5"), 90 PINCTRL_PIN(7, "GP148_ULPI_D6"), 91 PINCTRL_PIN(8, "GP149_ULPI_D7"), 92 PINCTRL_PIN(9, "ULPI_DIR"), 93 PINCTRL_PIN(10, "ULPI_NXT"), 94 PINCTRL_PIN(11, "ULPI_REFCLK"), 95 PINCTRL_PIN(12, "ULPI_STP"), 96 /* eMMC (12 pins) */ 97 PINCTRL_PIN(13, "EMMC_CLK"), 98 PINCTRL_PIN(14, "EMMC_CMD"), 99 PINCTRL_PIN(15, "EMMC_D0"), 100 PINCTRL_PIN(16, "EMMC_D1"), 101 PINCTRL_PIN(17, "EMMC_D2"), 102 PINCTRL_PIN(18, "EMMC_D3"), 103 PINCTRL_PIN(19, "EMMC_D4"), 104 PINCTRL_PIN(20, "EMMC_D5"), 105 PINCTRL_PIN(21, "EMMC_D6"), 106 PINCTRL_PIN(22, "EMMC_D7"), 107 PINCTRL_PIN(23, "EMMC_RST_N"), 108 PINCTRL_PIN(24, "EMMC_RCLK"), 109 /* SDIO (20 pins) */ 110 PINCTRL_PIN(25, "GP77_SD_CD"), 111 PINCTRL_PIN(26, "GP78_SD_CLK"), 112 PINCTRL_PIN(27, "GP79_SD_CMD"), 113 PINCTRL_PIN(28, "GP80_SD_D0"), 114 PINCTRL_PIN(29, "GP81_SD_D1"), 115 PINCTRL_PIN(30, "GP82_SD_D2"), 116 PINCTRL_PIN(31, "GP83_SD_D3"), 117 PINCTRL_PIN(32, "GP84_SD_LS_CLK_FB"), 118 PINCTRL_PIN(33, "GP85_SD_LS_CMD_DIR"), 119 PINCTRL_PIN(34, "GP86_SD_LS_D_DIR"), 120 PINCTRL_PIN(35, "GP88_SD_LS_SEL"), 121 PINCTRL_PIN(36, "GP87_SD_PD"), 122 PINCTRL_PIN(37, "GP89_SD_WP"), 123 PINCTRL_PIN(38, "GP90_SDIO_CLK"), 124 PINCTRL_PIN(39, "GP91_SDIO_CMD"), 125 PINCTRL_PIN(40, "GP92_SDIO_D0"), 126 PINCTRL_PIN(41, "GP93_SDIO_D1"), 127 PINCTRL_PIN(42, "GP94_SDIO_D2"), 128 PINCTRL_PIN(43, "GP95_SDIO_D3"), 129 PINCTRL_PIN(44, "GP96_SDIO_PD"), 130 /* HSI (8 pins) */ 131 PINCTRL_PIN(45, "HSI_ACDATA"), 132 PINCTRL_PIN(46, "HSI_ACFLAG"), 133 PINCTRL_PIN(47, "HSI_ACREADY"), 134 PINCTRL_PIN(48, "HSI_ACWAKE"), 135 PINCTRL_PIN(49, "HSI_CADATA"), 136 PINCTRL_PIN(50, "HSI_CAFLAG"), 137 PINCTRL_PIN(51, "HSI_CAREADY"), 138 PINCTRL_PIN(52, "HSI_CAWAKE"), 139 /* SSP Audio (14 pins) */ 140 PINCTRL_PIN(53, "GP70"), 141 PINCTRL_PIN(54, "GP71"), 142 PINCTRL_PIN(55, "GP32_I2S_0_CLK"), 143 PINCTRL_PIN(56, "GP33_I2S_0_FS"), 144 PINCTRL_PIN(57, "GP34_I2S_0_RXD"), 145 PINCTRL_PIN(58, "GP35_I2S_0_TXD"), 146 PINCTRL_PIN(59, "GP36_I2S_1_CLK"), 147 PINCTRL_PIN(60, "GP37_I2S_1_FS"), 148 PINCTRL_PIN(61, "GP38_I2S_1_RXD"), 149 PINCTRL_PIN(62, "GP39_I2S_1_TXD"), 150 PINCTRL_PIN(63, "GP40_I2S_2_CLK"), 151 PINCTRL_PIN(64, "GP41_I2S_2_FS"), 152 PINCTRL_PIN(65, "GP42_I2S_2_RXD"), 153 PINCTRL_PIN(66, "GP43_I2S_2_TXD"), 154 /* GP SSP (22 pins) */ 155 PINCTRL_PIN(67, "GP120_SPI_0_CLK"), 156 PINCTRL_PIN(68, "GP121_SPI_0_SS"), 157 PINCTRL_PIN(69, "GP122_SPI_0_RXD"), 158 PINCTRL_PIN(70, "GP123_SPI_0_TXD"), 159 PINCTRL_PIN(71, "GP102_SPI_1_CLK"), 160 PINCTRL_PIN(72, "GP103_SPI_1_SS0"), 161 PINCTRL_PIN(73, "GP104_SPI_1_SS1"), 162 PINCTRL_PIN(74, "GP105_SPI_1_SS2"), 163 PINCTRL_PIN(75, "GP106_SPI_1_SS3"), 164 PINCTRL_PIN(76, "GP107_SPI_1_RXD"), 165 PINCTRL_PIN(77, "GP108_SPI_1_TXD"), 166 PINCTRL_PIN(78, "GP109_SPI_2_CLK"), 167 PINCTRL_PIN(79, "GP110_SPI_2_SS0"), 168 PINCTRL_PIN(80, "GP111_SPI_2_SS1"), 169 PINCTRL_PIN(81, "GP112_SPI_2_SS2"), 170 PINCTRL_PIN(82, "GP113_SPI_2_SS3"), 171 PINCTRL_PIN(83, "GP114_SPI_2_RXD"), 172 PINCTRL_PIN(84, "GP115_SPI_2_TXD"), 173 PINCTRL_PIN(85, "GP116_SPI_3_CLK"), 174 PINCTRL_PIN(86, "GP117_SPI_3_SS"), 175 PINCTRL_PIN(87, "GP118_SPI_3_RXD"), 176 PINCTRL_PIN(88, "GP119_SPI_3_TXD"), 177 /* I2C (20 pins) */ 178 PINCTRL_PIN(89, "I2C_0_SCL"), 179 PINCTRL_PIN(90, "I2C_0_SDA"), 180 PINCTRL_PIN(91, "GP19_I2C_1_SCL"), 181 PINCTRL_PIN(92, "GP20_I2C_1_SDA"), 182 PINCTRL_PIN(93, "GP21_I2C_2_SCL"), 183 PINCTRL_PIN(94, "GP22_I2C_2_SDA"), 184 PINCTRL_PIN(95, "GP17_I2C_3_SCL_HDMI"), 185 PINCTRL_PIN(96, "GP18_I2C_3_SDA_HDMI"), 186 PINCTRL_PIN(97, "GP23_I2C_4_SCL"), 187 PINCTRL_PIN(98, "GP24_I2C_4_SDA"), 188 PINCTRL_PIN(99, "GP25_I2C_5_SCL"), 189 PINCTRL_PIN(100, "GP26_I2C_5_SDA"), 190 PINCTRL_PIN(101, "GP27_I2C_6_SCL"), 191 PINCTRL_PIN(102, "GP28_I2C_6_SDA"), 192 PINCTRL_PIN(103, "GP29_I2C_7_SCL"), 193 PINCTRL_PIN(104, "GP30_I2C_7_SDA"), 194 PINCTRL_PIN(105, "I2C_8_SCL"), 195 PINCTRL_PIN(106, "I2C_8_SDA"), 196 PINCTRL_PIN(107, "I2C_9_SCL"), 197 PINCTRL_PIN(108, "I2C_9_SDA"), 198 /* UART (23 pins) */ 199 PINCTRL_PIN(109, "GP124_UART_0_CTS"), 200 PINCTRL_PIN(110, "GP125_UART_0_RTS"), 201 PINCTRL_PIN(111, "GP126_UART_0_RX"), 202 PINCTRL_PIN(112, "GP127_UART_0_TX"), 203 PINCTRL_PIN(113, "GP128_UART_1_CTS"), 204 PINCTRL_PIN(114, "GP129_UART_1_RTS"), 205 PINCTRL_PIN(115, "GP130_UART_1_RX"), 206 PINCTRL_PIN(116, "GP131_UART_1_TX"), 207 PINCTRL_PIN(117, "GP132_UART_2_CTS"), 208 PINCTRL_PIN(118, "GP133_UART_2_RTS"), 209 PINCTRL_PIN(119, "GP134_UART_2_RX"), 210 PINCTRL_PIN(120, "GP135_UART_2_TX"), 211 PINCTRL_PIN(121, "GP97"), 212 PINCTRL_PIN(122, "GP154"), 213 PINCTRL_PIN(123, "GP155"), 214 PINCTRL_PIN(124, "GP156"), 215 PINCTRL_PIN(125, "GP157"), 216 PINCTRL_PIN(126, "GP158"), 217 PINCTRL_PIN(127, "GP159"), 218 PINCTRL_PIN(128, "GP160"), 219 PINCTRL_PIN(129, "GP161"), 220 PINCTRL_PIN(130, "GP12_PWM0"), 221 PINCTRL_PIN(131, "GP13_PWM1"), 222 /* GPIO South (20 pins) */ 223 PINCTRL_PIN(132, "GP176"), 224 PINCTRL_PIN(133, "GP177"), 225 PINCTRL_PIN(134, "GP178"), 226 PINCTRL_PIN(135, "GP179"), 227 PINCTRL_PIN(136, "GP180"), 228 PINCTRL_PIN(137, "GP181"), 229 PINCTRL_PIN(138, "GP182_PWM2"), 230 PINCTRL_PIN(139, "GP183_PWM3"), 231 PINCTRL_PIN(140, "GP184"), 232 PINCTRL_PIN(141, "GP185"), 233 PINCTRL_PIN(142, "GP186"), 234 PINCTRL_PIN(143, "GP187"), 235 PINCTRL_PIN(144, "GP188"), 236 PINCTRL_PIN(145, "GP189"), 237 PINCTRL_PIN(146, "GP190"), 238 PINCTRL_PIN(147, "GP191"), 239 PINCTRL_PIN(148, "GP14"), 240 PINCTRL_PIN(149, "GP15"), 241 PINCTRL_PIN(150, "GP162"), 242 PINCTRL_PIN(151, "GP163"), 243 /* Camera Sideband (15 pins) */ 244 PINCTRL_PIN(152, "GP0"), 245 PINCTRL_PIN(153, "GP1"), 246 PINCTRL_PIN(154, "GP2"), 247 PINCTRL_PIN(155, "GP3"), 248 PINCTRL_PIN(156, "GP4"), 249 PINCTRL_PIN(157, "GP5"), 250 PINCTRL_PIN(158, "GP6"), 251 PINCTRL_PIN(159, "GP7"), 252 PINCTRL_PIN(160, "GP8"), 253 PINCTRL_PIN(161, "GP9"), 254 PINCTRL_PIN(162, "GP10"), 255 PINCTRL_PIN(163, "GP11"), 256 PINCTRL_PIN(164, "GP16_HDMI_HPD"), 257 PINCTRL_PIN(165, "GP68_DSI_A_TE"), 258 PINCTRL_PIN(166, "GP69_DSI_C_TE"), 259 /* Clock (14 pins) */ 260 PINCTRL_PIN(167, "GP137"), 261 PINCTRL_PIN(168, "GP138"), 262 PINCTRL_PIN(169, "GP139"), 263 PINCTRL_PIN(170, "GP140"), 264 PINCTRL_PIN(171, "GP141"), 265 PINCTRL_PIN(172, "GP142"), 266 PINCTRL_PIN(173, "GP98"), 267 PINCTRL_PIN(174, "OSC_CLK_CTRL0"), 268 PINCTRL_PIN(175, "OSC_CLK_CTRL1"), 269 PINCTRL_PIN(176, "OSC_CLK0"), 270 PINCTRL_PIN(177, "OSC_CLK1"), 271 PINCTRL_PIN(178, "OSC_CLK2"), 272 PINCTRL_PIN(179, "OSC_CLK3"), 273 PINCTRL_PIN(180, "OSC_CLK4"), 274 /* PMIC (15 pins) */ 275 PINCTRL_PIN(181, "PROCHOT"), 276 PINCTRL_PIN(182, "RESETOUT"), 277 PINCTRL_PIN(183, "RTC_CLK"), 278 PINCTRL_PIN(184, "STANDBY"), 279 PINCTRL_PIN(185, "SVID_ALERT"), 280 PINCTRL_PIN(186, "SVID_CLK"), 281 PINCTRL_PIN(187, "SVID_D"), 282 PINCTRL_PIN(188, "THERMTRIP"), 283 PINCTRL_PIN(189, "PREQ"), 284 PINCTRL_PIN(190, "ZQ_A"), 285 PINCTRL_PIN(191, "ZQ_B"), 286 PINCTRL_PIN(192, "GP64_FAST_INT0"), 287 PINCTRL_PIN(193, "GP65_FAST_INT1"), 288 PINCTRL_PIN(194, "GP66_FAST_INT2"), 289 PINCTRL_PIN(195, "GP67_FAST_INT3"), 290 /* Keyboard (20 pins) */ 291 PINCTRL_PIN(196, "GP44"), 292 PINCTRL_PIN(197, "GP45"), 293 PINCTRL_PIN(198, "GP46"), 294 PINCTRL_PIN(199, "GP47"), 295 PINCTRL_PIN(200, "GP48"), 296 PINCTRL_PIN(201, "GP49"), 297 PINCTRL_PIN(202, "GP50"), 298 PINCTRL_PIN(203, "GP51"), 299 PINCTRL_PIN(204, "GP52"), 300 PINCTRL_PIN(205, "GP53"), 301 PINCTRL_PIN(206, "GP54"), 302 PINCTRL_PIN(207, "GP55"), 303 PINCTRL_PIN(208, "GP56"), 304 PINCTRL_PIN(209, "GP57"), 305 PINCTRL_PIN(210, "GP58"), 306 PINCTRL_PIN(211, "GP59"), 307 PINCTRL_PIN(212, "GP60"), 308 PINCTRL_PIN(213, "GP61"), 309 PINCTRL_PIN(214, "GP62"), 310 PINCTRL_PIN(215, "GP63"), 311 /* GPIO North (13 pins) */ 312 PINCTRL_PIN(216, "GP164"), 313 PINCTRL_PIN(217, "GP165"), 314 PINCTRL_PIN(218, "GP166"), 315 PINCTRL_PIN(219, "GP167"), 316 PINCTRL_PIN(220, "GP168_MJTAG_TCK"), 317 PINCTRL_PIN(221, "GP169_MJTAG_TDI"), 318 PINCTRL_PIN(222, "GP170_MJTAG_TDO"), 319 PINCTRL_PIN(223, "GP171_MJTAG_TMS"), 320 PINCTRL_PIN(224, "GP172_MJTAG_TRST"), 321 PINCTRL_PIN(225, "GP173"), 322 PINCTRL_PIN(226, "GP174"), 323 PINCTRL_PIN(227, "GP175"), 324 PINCTRL_PIN(228, "GP176"), 325 /* PTI (22 pins) */ 326 PINCTRL_PIN(229, "GP72_PTI_CLK"), 327 PINCTRL_PIN(230, "GP73_PTI_D0"), 328 PINCTRL_PIN(231, "GP74_PTI_D1"), 329 PINCTRL_PIN(232, "GP75_PTI_D2"), 330 PINCTRL_PIN(233, "GP76_PTI_D3"), 331 PINCTRL_PIN(234, "GP164"), 332 PINCTRL_PIN(235, "GP165"), 333 PINCTRL_PIN(236, "GP166"), 334 PINCTRL_PIN(237, "GP167"), 335 PINCTRL_PIN(238, "GP168_MJTAG_TCK"), 336 PINCTRL_PIN(239, "GP169_MJTAG_TDI"), 337 PINCTRL_PIN(240, "GP170_MJTAG_TDO"), 338 PINCTRL_PIN(241, "GP171_MJTAG_TMS"), 339 PINCTRL_PIN(242, "GP172_MJTAG_TRST"), 340 PINCTRL_PIN(243, "GP173"), 341 PINCTRL_PIN(244, "GP174"), 342 PINCTRL_PIN(245, "GP175"), 343 PINCTRL_PIN(246, "JTAG_TCK"), 344 PINCTRL_PIN(247, "JTAG_TDI"), 345 PINCTRL_PIN(248, "JTAG_TDO"), 346 PINCTRL_PIN(249, "JTAG_TMS"), 347 PINCTRL_PIN(250, "JTAG_TRST"), 348 }; 349 350 static const struct mofld_family mofld_families[] = { 351 MOFLD_FAMILY(0, 0, 12), 352 MOFLD_FAMILY(1, 13, 24), 353 MOFLD_FAMILY(2, 25, 44), 354 MOFLD_FAMILY(3, 45, 52), 355 MOFLD_FAMILY(4, 53, 66), 356 MOFLD_FAMILY(5, 67, 88), 357 MOFLD_FAMILY(6, 89, 108), 358 MOFLD_FAMILY(7, 109, 131), 359 MOFLD_FAMILY(8, 132, 151), 360 MOFLD_FAMILY(9, 152, 166), 361 MOFLD_FAMILY(10, 167, 180), 362 MOFLD_FAMILY(11, 181, 195), 363 MOFLD_FAMILY(12, 196, 215), 364 MOFLD_FAMILY(13, 216, 228), 365 MOFLD_FAMILY(14, 229, 250), 366 }; 367 368 /** 369 * struct mofld_pinctrl - Intel Merrifield pinctrl private structure 370 * @dev: Pointer to the device structure 371 * @lock: Lock to serialize register access 372 * @pctldesc: Pin controller description 373 * @pctldev: Pointer to the pin controller device 374 * @families: Array of families this pinctrl handles 375 * @nfamilies: Number of families in the array 376 * @functions: Array of functions 377 * @nfunctions: Number of functions in the array 378 * @groups: Array of pin groups 379 * @ngroups: Number of groups in the array 380 * @pins: Array of pins this pinctrl controls 381 * @npins: Number of pins in the array 382 */ 383 struct mofld_pinctrl { 384 struct device *dev; 385 raw_spinlock_t lock; 386 struct pinctrl_desc pctldesc; 387 struct pinctrl_dev *pctldev; 388 389 /* Pin controller configuration */ 390 const struct mofld_family *families; 391 size_t nfamilies; 392 const struct intel_function *functions; 393 size_t nfunctions; 394 const struct intel_pingroup *groups; 395 size_t ngroups; 396 const struct pinctrl_pin_desc *pins; 397 size_t npins; 398 }; 399 400 #define pin_to_bufno(f, p) ((p) - (f)->pin_base) 401 402 static const struct mofld_family *mofld_get_family(struct mofld_pinctrl *mp, unsigned int pin) 403 { 404 const struct mofld_family *family; 405 unsigned int i; 406 407 for (i = 0; i < mp->nfamilies; i++) { 408 family = &mp->families[i]; 409 if (pin >= family->pin_base && 410 pin < family->pin_base + family->npins) 411 return family; 412 } 413 414 dev_warn(mp->dev, "failed to find family for pin %u\n", pin); 415 return NULL; 416 } 417 418 static bool mofld_buf_available(struct mofld_pinctrl *mp, unsigned int pin) 419 { 420 const struct mofld_family *family; 421 422 family = mofld_get_family(mp, pin); 423 if (!family) 424 return false; 425 426 return !family->protected; 427 } 428 429 static void __iomem *mofld_get_bufcfg(struct mofld_pinctrl *mp, unsigned int pin) 430 { 431 const struct mofld_family *family; 432 unsigned int bufno; 433 434 family = mofld_get_family(mp, pin); 435 if (!family) 436 return NULL; 437 438 bufno = pin_to_bufno(family, pin); 439 return family->regs + BUFCFG_OFFSET + bufno * 4; 440 } 441 442 static int mofld_read_bufcfg(struct mofld_pinctrl *mp, unsigned int pin, u32 *value) 443 { 444 void __iomem *bufcfg; 445 446 if (!mofld_buf_available(mp, pin)) 447 return -EBUSY; 448 449 bufcfg = mofld_get_bufcfg(mp, pin); 450 *value = readl(bufcfg); 451 452 return 0; 453 } 454 455 static void mofld_update_bufcfg(struct mofld_pinctrl *mp, unsigned int pin, u32 bits, u32 mask) 456 { 457 void __iomem *bufcfg; 458 u32 value; 459 460 bufcfg = mofld_get_bufcfg(mp, pin); 461 value = readl(bufcfg); 462 463 value &= ~mask; 464 value |= bits & mask; 465 466 writel(value, bufcfg); 467 } 468 469 static int mofld_get_groups_count(struct pinctrl_dev *pctldev) 470 { 471 struct mofld_pinctrl *mp = pinctrl_dev_get_drvdata(pctldev); 472 473 return mp->ngroups; 474 } 475 476 static const char *mofld_get_group_name(struct pinctrl_dev *pctldev, unsigned int group) 477 { 478 struct mofld_pinctrl *mp = pinctrl_dev_get_drvdata(pctldev); 479 480 return mp->groups[group].grp.name; 481 } 482 483 static int mofld_get_group_pins(struct pinctrl_dev *pctldev, unsigned int group, 484 const unsigned int **pins, unsigned int *npins) 485 { 486 struct mofld_pinctrl *mp = pinctrl_dev_get_drvdata(pctldev); 487 488 *pins = mp->groups[group].grp.pins; 489 *npins = mp->groups[group].grp.npins; 490 return 0; 491 } 492 493 static void mofld_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s, 494 unsigned int pin) 495 { 496 struct mofld_pinctrl *mp = pinctrl_dev_get_drvdata(pctldev); 497 u32 value, mode; 498 int ret; 499 500 ret = mofld_read_bufcfg(mp, pin, &value); 501 if (ret) { 502 seq_puts(s, "not available"); 503 return; 504 } 505 506 mode = (value & BUFCFG_PINMODE_MASK) >> BUFCFG_PINMODE_SHIFT; 507 if (!mode) 508 seq_puts(s, "GPIO "); 509 else 510 seq_printf(s, "mode %d ", mode); 511 512 seq_printf(s, "0x%08x", value); 513 } 514 515 static const struct pinctrl_ops mofld_pinctrl_ops = { 516 .get_groups_count = mofld_get_groups_count, 517 .get_group_name = mofld_get_group_name, 518 .get_group_pins = mofld_get_group_pins, 519 .pin_dbg_show = mofld_pin_dbg_show, 520 }; 521 522 static int mofld_get_functions_count(struct pinctrl_dev *pctldev) 523 { 524 struct mofld_pinctrl *mp = pinctrl_dev_get_drvdata(pctldev); 525 526 return mp->nfunctions; 527 } 528 529 static const char *mofld_get_function_name(struct pinctrl_dev *pctldev, unsigned int function) 530 { 531 struct mofld_pinctrl *mp = pinctrl_dev_get_drvdata(pctldev); 532 533 return mp->functions[function].name; 534 } 535 536 static int mofld_get_function_groups(struct pinctrl_dev *pctldev, unsigned int function, 537 const char * const **groups, unsigned int * const ngroups) 538 { 539 struct mofld_pinctrl *mp = pinctrl_dev_get_drvdata(pctldev); 540 541 *groups = mp->functions[function].groups; 542 *ngroups = mp->functions[function].ngroups; 543 return 0; 544 } 545 546 static int mofld_pinmux_set_mux(struct pinctrl_dev *pctldev, unsigned int function, 547 unsigned int group) 548 { 549 struct mofld_pinctrl *mp = pinctrl_dev_get_drvdata(pctldev); 550 const struct intel_pingroup *grp = &mp->groups[group]; 551 u32 bits = grp->mode << BUFCFG_PINMODE_SHIFT; 552 u32 mask = BUFCFG_PINMODE_MASK; 553 unsigned long flags; 554 unsigned int i; 555 556 /* 557 * All pins in the groups needs to be accessible and writable 558 * before we can enable the mux for this group. 559 */ 560 for (i = 0; i < grp->grp.npins; i++) { 561 if (!mofld_buf_available(mp, grp->grp.pins[i])) 562 return -EBUSY; 563 } 564 565 /* Now enable the mux setting for each pin in the group */ 566 raw_spin_lock_irqsave(&mp->lock, flags); 567 for (i = 0; i < grp->grp.npins; i++) 568 mofld_update_bufcfg(mp, grp->grp.pins[i], bits, mask); 569 raw_spin_unlock_irqrestore(&mp->lock, flags); 570 571 return 0; 572 } 573 574 static int mofld_gpio_request_enable(struct pinctrl_dev *pctldev, 575 struct pinctrl_gpio_range *range, 576 unsigned int pin) 577 { 578 struct mofld_pinctrl *mp = pinctrl_dev_get_drvdata(pctldev); 579 u32 bits = BUFCFG_PINMODE_GPIO << BUFCFG_PINMODE_SHIFT; 580 u32 mask = BUFCFG_PINMODE_MASK; 581 unsigned long flags; 582 583 if (!mofld_buf_available(mp, pin)) 584 return -EBUSY; 585 586 raw_spin_lock_irqsave(&mp->lock, flags); 587 mofld_update_bufcfg(mp, pin, bits, mask); 588 raw_spin_unlock_irqrestore(&mp->lock, flags); 589 590 return 0; 591 } 592 593 static const struct pinmux_ops mofld_pinmux_ops = { 594 .get_functions_count = mofld_get_functions_count, 595 .get_function_name = mofld_get_function_name, 596 .get_function_groups = mofld_get_function_groups, 597 .set_mux = mofld_pinmux_set_mux, 598 .gpio_request_enable = mofld_gpio_request_enable, 599 }; 600 601 static int mofld_config_get(struct pinctrl_dev *pctldev, unsigned int pin, 602 unsigned long *config) 603 { 604 struct mofld_pinctrl *mp = pinctrl_dev_get_drvdata(pctldev); 605 enum pin_config_param param = pinconf_to_config_param(*config); 606 u32 value, term; 607 u16 arg = 0; 608 int ret; 609 610 ret = mofld_read_bufcfg(mp, pin, &value); 611 if (ret) 612 return -ENOTSUPP; 613 614 term = (value & BUFCFG_PUPD_VAL_MASK) >> BUFCFG_PUPD_VAL_SHIFT; 615 616 switch (param) { 617 case PIN_CONFIG_BIAS_DISABLE: 618 if (value & BUFCFG_Px_EN_MASK) 619 return -EINVAL; 620 break; 621 622 case PIN_CONFIG_BIAS_PULL_UP: 623 if ((value & BUFCFG_Px_EN_MASK) != BUFCFG_PU_EN) 624 return -EINVAL; 625 626 switch (term) { 627 case BUFCFG_PUPD_VAL_910: 628 arg = 910; 629 break; 630 case BUFCFG_PUPD_VAL_2K: 631 arg = 2000; 632 break; 633 case BUFCFG_PUPD_VAL_20K: 634 arg = 20000; 635 break; 636 case BUFCFG_PUPD_VAL_50K: 637 arg = 50000; 638 break; 639 } 640 641 break; 642 643 case PIN_CONFIG_BIAS_PULL_DOWN: 644 if ((value & BUFCFG_Px_EN_MASK) != BUFCFG_PD_EN) 645 return -EINVAL; 646 647 switch (term) { 648 case BUFCFG_PUPD_VAL_910: 649 arg = 910; 650 break; 651 case BUFCFG_PUPD_VAL_2K: 652 arg = 2000; 653 break; 654 case BUFCFG_PUPD_VAL_20K: 655 arg = 20000; 656 break; 657 case BUFCFG_PUPD_VAL_50K: 658 arg = 50000; 659 break; 660 } 661 662 break; 663 664 case PIN_CONFIG_DRIVE_OPEN_DRAIN: 665 if (!(value & BUFCFG_OD_EN)) 666 return -EINVAL; 667 break; 668 669 case PIN_CONFIG_SLEW_RATE: 670 if (!(value & BUFCFG_SLEWSEL)) 671 arg = 0; 672 else 673 arg = 1; 674 break; 675 676 default: 677 return -ENOTSUPP; 678 } 679 680 *config = pinconf_to_config_packed(param, arg); 681 return 0; 682 } 683 684 static int mofld_config_set_pin(struct mofld_pinctrl *mp, unsigned int pin, 685 unsigned long config) 686 { 687 unsigned int param = pinconf_to_config_param(config); 688 unsigned int arg = pinconf_to_config_argument(config); 689 u32 bits = 0, mask = 0; 690 unsigned long flags; 691 692 switch (param) { 693 case PIN_CONFIG_BIAS_DISABLE: 694 mask |= BUFCFG_Px_EN_MASK | BUFCFG_PUPD_VAL_MASK; 695 break; 696 697 case PIN_CONFIG_BIAS_PULL_UP: 698 mask |= BUFCFG_Px_EN_MASK | BUFCFG_PUPD_VAL_MASK; 699 bits |= BUFCFG_PU_EN; 700 701 switch (arg) { 702 case 50000: 703 bits |= BUFCFG_PUPD_VAL_50K << BUFCFG_PUPD_VAL_SHIFT; 704 break; 705 case 20000: 706 bits |= BUFCFG_PUPD_VAL_20K << BUFCFG_PUPD_VAL_SHIFT; 707 break; 708 case 2000: 709 bits |= BUFCFG_PUPD_VAL_2K << BUFCFG_PUPD_VAL_SHIFT; 710 break; 711 default: 712 return -EINVAL; 713 } 714 715 break; 716 717 case PIN_CONFIG_BIAS_PULL_DOWN: 718 mask |= BUFCFG_Px_EN_MASK | BUFCFG_PUPD_VAL_MASK; 719 bits |= BUFCFG_PD_EN; 720 721 switch (arg) { 722 case 50000: 723 bits |= BUFCFG_PUPD_VAL_50K << BUFCFG_PUPD_VAL_SHIFT; 724 break; 725 case 20000: 726 bits |= BUFCFG_PUPD_VAL_20K << BUFCFG_PUPD_VAL_SHIFT; 727 break; 728 case 2000: 729 bits |= BUFCFG_PUPD_VAL_2K << BUFCFG_PUPD_VAL_SHIFT; 730 break; 731 default: 732 return -EINVAL; 733 } 734 735 break; 736 737 case PIN_CONFIG_DRIVE_OPEN_DRAIN: 738 mask |= BUFCFG_OD_EN; 739 if (arg) 740 bits |= BUFCFG_OD_EN; 741 break; 742 743 case PIN_CONFIG_SLEW_RATE: 744 mask |= BUFCFG_SLEWSEL; 745 if (arg) 746 bits |= BUFCFG_SLEWSEL; 747 break; 748 } 749 750 raw_spin_lock_irqsave(&mp->lock, flags); 751 mofld_update_bufcfg(mp, pin, bits, mask); 752 raw_spin_unlock_irqrestore(&mp->lock, flags); 753 754 return 0; 755 } 756 757 static int mofld_config_set(struct pinctrl_dev *pctldev, unsigned int pin, 758 unsigned long *configs, unsigned int nconfigs) 759 { 760 struct mofld_pinctrl *mp = pinctrl_dev_get_drvdata(pctldev); 761 unsigned int i; 762 int ret; 763 764 if (!mofld_buf_available(mp, pin)) 765 return -ENOTSUPP; 766 767 for (i = 0; i < nconfigs; i++) { 768 switch (pinconf_to_config_param(configs[i])) { 769 case PIN_CONFIG_BIAS_DISABLE: 770 case PIN_CONFIG_BIAS_PULL_UP: 771 case PIN_CONFIG_BIAS_PULL_DOWN: 772 case PIN_CONFIG_DRIVE_OPEN_DRAIN: 773 case PIN_CONFIG_SLEW_RATE: 774 ret = mofld_config_set_pin(mp, pin, configs[i]); 775 if (ret) 776 return ret; 777 break; 778 779 default: 780 return -ENOTSUPP; 781 } 782 } 783 784 return 0; 785 } 786 787 static int mofld_config_group_get(struct pinctrl_dev *pctldev, unsigned int group, 788 unsigned long *config) 789 { 790 const unsigned int *pins; 791 unsigned int npins; 792 int ret; 793 794 ret = mofld_get_group_pins(pctldev, group, &pins, &npins); 795 if (ret) 796 return ret; 797 798 ret = mofld_config_get(pctldev, pins[0], config); 799 if (ret) 800 return ret; 801 802 return 0; 803 } 804 805 static int mofld_config_group_set(struct pinctrl_dev *pctldev, unsigned int group, 806 unsigned long *configs, unsigned int num_configs) 807 { 808 const unsigned int *pins; 809 unsigned int npins; 810 int i, ret; 811 812 ret = mofld_get_group_pins(pctldev, group, &pins, &npins); 813 if (ret) 814 return ret; 815 816 for (i = 0; i < npins; i++) { 817 ret = mofld_config_set(pctldev, pins[i], configs, num_configs); 818 if (ret) 819 return ret; 820 } 821 822 return 0; 823 } 824 825 static const struct pinconf_ops mofld_pinconf_ops = { 826 .is_generic = true, 827 .pin_config_get = mofld_config_get, 828 .pin_config_set = mofld_config_set, 829 .pin_config_group_get = mofld_config_group_get, 830 .pin_config_group_set = mofld_config_group_set, 831 }; 832 833 static const struct pinctrl_desc mofld_pinctrl_desc = { 834 .pctlops = &mofld_pinctrl_ops, 835 .pmxops = &mofld_pinmux_ops, 836 .confops = &mofld_pinconf_ops, 837 .owner = THIS_MODULE, 838 }; 839 840 static int mofld_pinctrl_probe(struct platform_device *pdev) 841 { 842 struct device *dev = &pdev->dev; 843 struct mofld_family *families; 844 struct mofld_pinctrl *mp; 845 void __iomem *regs; 846 size_t nfamilies; 847 unsigned int i; 848 849 mp = devm_kzalloc(dev, sizeof(*mp), GFP_KERNEL); 850 if (!mp) 851 return -ENOMEM; 852 853 mp->dev = dev; 854 raw_spin_lock_init(&mp->lock); 855 856 regs = devm_platform_ioremap_resource(pdev, 0); 857 if (IS_ERR(regs)) 858 return PTR_ERR(regs); 859 860 nfamilies = ARRAY_SIZE(mofld_families), 861 families = devm_kmemdup(dev, mofld_families, sizeof(mofld_families), GFP_KERNEL); 862 if (!families) 863 return -ENOMEM; 864 865 /* Splice memory resource by chunk per family */ 866 for (i = 0; i < nfamilies; i++) { 867 struct mofld_family *family = &families[i]; 868 869 family->regs = regs + family->barno * MOFLD_FAMILY_LEN; 870 } 871 872 mp->families = families; 873 mp->nfamilies = nfamilies; 874 mp->pctldesc = mofld_pinctrl_desc; 875 mp->pctldesc.name = dev_name(dev); 876 mp->pctldesc.pins = mofld_pins; 877 mp->pctldesc.npins = ARRAY_SIZE(mofld_pins); 878 879 mp->pctldev = devm_pinctrl_register(dev, &mp->pctldesc, mp); 880 if (IS_ERR(mp->pctldev)) 881 return PTR_ERR(mp->pctldev); 882 883 platform_set_drvdata(pdev, mp); 884 return 0; 885 } 886 887 static const struct acpi_device_id mofld_acpi_table[] = { 888 { "INTC1003" }, 889 { } 890 }; 891 MODULE_DEVICE_TABLE(acpi, mofld_acpi_table); 892 893 static struct platform_driver mofld_pinctrl_driver = { 894 .probe = mofld_pinctrl_probe, 895 .driver = { 896 .name = "pinctrl-moorefield", 897 .acpi_match_table = mofld_acpi_table, 898 }, 899 }; 900 901 static int __init mofld_pinctrl_init(void) 902 { 903 return platform_driver_register(&mofld_pinctrl_driver); 904 } 905 subsys_initcall(mofld_pinctrl_init); 906 907 static void __exit mofld_pinctrl_exit(void) 908 { 909 platform_driver_unregister(&mofld_pinctrl_driver); 910 } 911 module_exit(mofld_pinctrl_exit); 912 913 MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>"); 914 MODULE_DESCRIPTION("Intel Moorefield SoC pinctrl driver"); 915 MODULE_LICENSE("GPL v2"); 916 MODULE_ALIAS("platform:pinctrl-moorefield"); 917