1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (C) 2020 Sean Anderson <seanga2@gmail.com> 4 * Copyright (c) 2020 Western Digital Corporation or its affiliates. 5 */ 6 #include <linux/io.h> 7 #include <linux/of_device.h> 8 #include <linux/clk.h> 9 #include <linux/mfd/syscon.h> 10 #include <linux/platform_device.h> 11 #include <linux/bitfield.h> 12 #include <linux/regmap.h> 13 #include <linux/slab.h> 14 #include <linux/pinctrl/pinctrl.h> 15 #include <linux/pinctrl/pinmux.h> 16 #include <linux/pinctrl/pinconf.h> 17 #include <linux/pinctrl/pinconf-generic.h> 18 #include <linux/io.h> 19 20 #include <dt-bindings/pinctrl/k210-fpioa.h> 21 22 #include "core.h" 23 #include "pinconf.h" 24 #include "pinctrl-utils.h" 25 26 /* 27 * The K210 only implements 8 drive levels, even though 28 * there is register space for 16 29 */ 30 #define K210_PC_DRIVE_MASK GENMASK(11, 8) 31 #define K210_PC_DRIVE_SHIFT 8 32 #define K210_PC_DRIVE_0 (0 << K210_PC_DRIVE_SHIFT) 33 #define K210_PC_DRIVE_1 (1 << K210_PC_DRIVE_SHIFT) 34 #define K210_PC_DRIVE_2 (2 << K210_PC_DRIVE_SHIFT) 35 #define K210_PC_DRIVE_3 (3 << K210_PC_DRIVE_SHIFT) 36 #define K210_PC_DRIVE_4 (4 << K210_PC_DRIVE_SHIFT) 37 #define K210_PC_DRIVE_5 (5 << K210_PC_DRIVE_SHIFT) 38 #define K210_PC_DRIVE_6 (6 << K210_PC_DRIVE_SHIFT) 39 #define K210_PC_DRIVE_7 (7 << K210_PC_DRIVE_SHIFT) 40 #define K210_PC_DRIVE_MAX 7 41 #define K210_PC_MODE_MASK GENMASK(23, 12) 42 43 /* 44 * output enabled == PC_OE & (PC_OE_INV ^ FUNCTION_OE) 45 * where FUNCTION_OE is a physical signal from the function. 46 */ 47 #define K210_PC_OE BIT(12) /* Output Enable */ 48 #define K210_PC_OE_INV BIT(13) /* INVert Output Enable */ 49 #define K210_PC_DO_OE BIT(14) /* set Data Out to Output Enable sig */ 50 #define K210_PC_DO_INV BIT(15) /* INVert final Data Output */ 51 #define K210_PC_PU BIT(16) /* Pull Up */ 52 #define K210_PC_PD BIT(17) /* Pull Down */ 53 /* Strong pull up not implemented on K210 */ 54 #define K210_PC_SL BIT(19) /* reduce SLew rate */ 55 /* Same semantics as OE above */ 56 #define K210_PC_IE BIT(20) /* Input Enable */ 57 #define K210_PC_IE_INV BIT(21) /* INVert Input Enable */ 58 #define K210_PC_DI_INV BIT(22) /* INVert Data Input */ 59 #define K210_PC_ST BIT(23) /* Schmitt Trigger */ 60 #define K210_PC_DI BIT(31) /* raw Data Input */ 61 62 #define K210_PC_BIAS_MASK (K210_PC_PU & K210_PC_PD) 63 64 #define K210_PC_MODE_IN (K210_PC_IE | K210_PC_ST) 65 #define K210_PC_MODE_OUT (K210_PC_DRIVE_7 | K210_PC_OE) 66 #define K210_PC_MODE_I2C (K210_PC_MODE_IN | K210_PC_SL | \ 67 K210_PC_OE | K210_PC_PU) 68 #define K210_PC_MODE_SCCB (K210_PC_MODE_I2C | \ 69 K210_PC_OE_INV | K210_PC_IE_INV) 70 #define K210_PC_MODE_SPI (K210_PC_MODE_IN | K210_PC_IE_INV | \ 71 K210_PC_MODE_OUT | K210_PC_OE_INV) 72 #define K210_PC_MODE_GPIO (K210_PC_MODE_IN | K210_PC_MODE_OUT) 73 74 #define K210_PG_FUNC GENMASK(7, 0) 75 #define K210_PG_DO BIT(8) 76 #define K210_PG_PIN GENMASK(22, 16) 77 78 /* 79 * struct k210_fpioa: Kendryte K210 FPIOA memory mapped registers 80 * @pins: 48 32-bits IO pin registers 81 * @tie_en: 256 (one per function) input tie enable bits 82 * @tie_val: 256 (one per function) input tie value bits 83 */ 84 struct k210_fpioa { 85 u32 pins[48]; 86 u32 tie_en[8]; 87 u32 tie_val[8]; 88 }; 89 90 struct k210_fpioa_data { 91 92 struct device *dev; 93 struct pinctrl_dev *pctl; 94 95 struct k210_fpioa __iomem *fpioa; 96 struct regmap *sysctl_map; 97 u32 power_offset; 98 struct clk *clk; 99 struct clk *pclk; 100 }; 101 102 #define K210_PIN_NAME(i) ("IO_" #i) 103 #define K210_PIN(i) [(i)] = PINCTRL_PIN((i), K210_PIN_NAME(i)) 104 105 static const struct pinctrl_pin_desc k210_pins[] = { 106 K210_PIN(0), K210_PIN(1), K210_PIN(2), 107 K210_PIN(3), K210_PIN(4), K210_PIN(5), 108 K210_PIN(6), K210_PIN(7), K210_PIN(8), 109 K210_PIN(9), K210_PIN(10), K210_PIN(11), 110 K210_PIN(12), K210_PIN(13), K210_PIN(14), 111 K210_PIN(15), K210_PIN(16), K210_PIN(17), 112 K210_PIN(18), K210_PIN(19), K210_PIN(20), 113 K210_PIN(21), K210_PIN(22), K210_PIN(23), 114 K210_PIN(24), K210_PIN(25), K210_PIN(26), 115 K210_PIN(27), K210_PIN(28), K210_PIN(29), 116 K210_PIN(30), K210_PIN(31), K210_PIN(32), 117 K210_PIN(33), K210_PIN(34), K210_PIN(35), 118 K210_PIN(36), K210_PIN(37), K210_PIN(38), 119 K210_PIN(39), K210_PIN(40), K210_PIN(41), 120 K210_PIN(42), K210_PIN(43), K210_PIN(44), 121 K210_PIN(45), K210_PIN(46), K210_PIN(47) 122 }; 123 124 #define K210_NPINS ARRAY_SIZE(k210_pins) 125 126 /* 127 * Pin groups: each of the 48 programmable pins is a group. 128 * To this are added 8 power domain groups, which for the purposes of 129 * the pin subsystem, contain no pins. The power domain groups only exist 130 * to set the power level. The id should never be used (since there are 131 * no pins 48-55). 132 */ 133 static const char *const k210_group_names[] = { 134 /* The first 48 groups are for pins, one each */ 135 K210_PIN_NAME(0), K210_PIN_NAME(1), K210_PIN_NAME(2), 136 K210_PIN_NAME(3), K210_PIN_NAME(4), K210_PIN_NAME(5), 137 K210_PIN_NAME(6), K210_PIN_NAME(7), K210_PIN_NAME(8), 138 K210_PIN_NAME(9), K210_PIN_NAME(10), K210_PIN_NAME(11), 139 K210_PIN_NAME(12), K210_PIN_NAME(13), K210_PIN_NAME(14), 140 K210_PIN_NAME(15), K210_PIN_NAME(16), K210_PIN_NAME(17), 141 K210_PIN_NAME(18), K210_PIN_NAME(19), K210_PIN_NAME(20), 142 K210_PIN_NAME(21), K210_PIN_NAME(22), K210_PIN_NAME(23), 143 K210_PIN_NAME(24), K210_PIN_NAME(25), K210_PIN_NAME(26), 144 K210_PIN_NAME(27), K210_PIN_NAME(28), K210_PIN_NAME(29), 145 K210_PIN_NAME(30), K210_PIN_NAME(31), K210_PIN_NAME(32), 146 K210_PIN_NAME(33), K210_PIN_NAME(34), K210_PIN_NAME(35), 147 K210_PIN_NAME(36), K210_PIN_NAME(37), K210_PIN_NAME(38), 148 K210_PIN_NAME(39), K210_PIN_NAME(40), K210_PIN_NAME(41), 149 K210_PIN_NAME(42), K210_PIN_NAME(43), K210_PIN_NAME(44), 150 K210_PIN_NAME(45), K210_PIN_NAME(46), K210_PIN_NAME(47), 151 [48] = "A0", [49] = "A1", [50] = "A2", 152 [51] = "B3", [52] = "B4", [53] = "B5", 153 [54] = "C6", [55] = "C7" 154 }; 155 156 #define K210_NGROUPS ARRAY_SIZE(k210_group_names) 157 158 enum k210_pinctrl_mode_id { 159 K210_PC_DEFAULT_DISABLED, 160 K210_PC_DEFAULT_IN, 161 K210_PC_DEFAULT_IN_TIE, 162 K210_PC_DEFAULT_OUT, 163 K210_PC_DEFAULT_I2C, 164 K210_PC_DEFAULT_SCCB, 165 K210_PC_DEFAULT_SPI, 166 K210_PC_DEFAULT_GPIO, 167 K210_PC_DEFAULT_INT13, 168 }; 169 170 #define K210_PC_DEFAULT(mode) \ 171 [K210_PC_DEFAULT_##mode] = K210_PC_MODE_##mode 172 173 static const u32 k210_pinconf_mode_id_to_mode[] = { 174 [K210_PC_DEFAULT_DISABLED] = 0, 175 K210_PC_DEFAULT(IN), 176 [K210_PC_DEFAULT_IN_TIE] = K210_PC_MODE_IN, 177 K210_PC_DEFAULT(OUT), 178 K210_PC_DEFAULT(I2C), 179 K210_PC_DEFAULT(SCCB), 180 K210_PC_DEFAULT(SPI), 181 K210_PC_DEFAULT(GPIO), 182 [K210_PC_DEFAULT_INT13] = K210_PC_MODE_IN | K210_PC_PU, 183 }; 184 185 #undef DEFAULT 186 187 /* 188 * Pin functions configuration information. 189 */ 190 struct k210_pcf_info { 191 char name[15]; 192 u8 mode_id; 193 }; 194 195 #define K210_FUNC(id, mode) \ 196 [K210_PCF_##id] = { \ 197 .name = #id, \ 198 .mode_id = K210_PC_DEFAULT_##mode \ 199 } 200 201 static const struct k210_pcf_info k210_pcf_infos[] = { 202 K210_FUNC(JTAG_TCLK, IN), 203 K210_FUNC(JTAG_TDI, IN), 204 K210_FUNC(JTAG_TMS, IN), 205 K210_FUNC(JTAG_TDO, OUT), 206 K210_FUNC(SPI0_D0, SPI), 207 K210_FUNC(SPI0_D1, SPI), 208 K210_FUNC(SPI0_D2, SPI), 209 K210_FUNC(SPI0_D3, SPI), 210 K210_FUNC(SPI0_D4, SPI), 211 K210_FUNC(SPI0_D5, SPI), 212 K210_FUNC(SPI0_D6, SPI), 213 K210_FUNC(SPI0_D7, SPI), 214 K210_FUNC(SPI0_SS0, OUT), 215 K210_FUNC(SPI0_SS1, OUT), 216 K210_FUNC(SPI0_SS2, OUT), 217 K210_FUNC(SPI0_SS3, OUT), 218 K210_FUNC(SPI0_ARB, IN_TIE), 219 K210_FUNC(SPI0_SCLK, OUT), 220 K210_FUNC(UARTHS_RX, IN), 221 K210_FUNC(UARTHS_TX, OUT), 222 K210_FUNC(RESV6, IN), 223 K210_FUNC(RESV7, IN), 224 K210_FUNC(CLK_SPI1, OUT), 225 K210_FUNC(CLK_I2C1, OUT), 226 K210_FUNC(GPIOHS0, GPIO), 227 K210_FUNC(GPIOHS1, GPIO), 228 K210_FUNC(GPIOHS2, GPIO), 229 K210_FUNC(GPIOHS3, GPIO), 230 K210_FUNC(GPIOHS4, GPIO), 231 K210_FUNC(GPIOHS5, GPIO), 232 K210_FUNC(GPIOHS6, GPIO), 233 K210_FUNC(GPIOHS7, GPIO), 234 K210_FUNC(GPIOHS8, GPIO), 235 K210_FUNC(GPIOHS9, GPIO), 236 K210_FUNC(GPIOHS10, GPIO), 237 K210_FUNC(GPIOHS11, GPIO), 238 K210_FUNC(GPIOHS12, GPIO), 239 K210_FUNC(GPIOHS13, GPIO), 240 K210_FUNC(GPIOHS14, GPIO), 241 K210_FUNC(GPIOHS15, GPIO), 242 K210_FUNC(GPIOHS16, GPIO), 243 K210_FUNC(GPIOHS17, GPIO), 244 K210_FUNC(GPIOHS18, GPIO), 245 K210_FUNC(GPIOHS19, GPIO), 246 K210_FUNC(GPIOHS20, GPIO), 247 K210_FUNC(GPIOHS21, GPIO), 248 K210_FUNC(GPIOHS22, GPIO), 249 K210_FUNC(GPIOHS23, GPIO), 250 K210_FUNC(GPIOHS24, GPIO), 251 K210_FUNC(GPIOHS25, GPIO), 252 K210_FUNC(GPIOHS26, GPIO), 253 K210_FUNC(GPIOHS27, GPIO), 254 K210_FUNC(GPIOHS28, GPIO), 255 K210_FUNC(GPIOHS29, GPIO), 256 K210_FUNC(GPIOHS30, GPIO), 257 K210_FUNC(GPIOHS31, GPIO), 258 K210_FUNC(GPIO0, GPIO), 259 K210_FUNC(GPIO1, GPIO), 260 K210_FUNC(GPIO2, GPIO), 261 K210_FUNC(GPIO3, GPIO), 262 K210_FUNC(GPIO4, GPIO), 263 K210_FUNC(GPIO5, GPIO), 264 K210_FUNC(GPIO6, GPIO), 265 K210_FUNC(GPIO7, GPIO), 266 K210_FUNC(UART1_RX, IN), 267 K210_FUNC(UART1_TX, OUT), 268 K210_FUNC(UART2_RX, IN), 269 K210_FUNC(UART2_TX, OUT), 270 K210_FUNC(UART3_RX, IN), 271 K210_FUNC(UART3_TX, OUT), 272 K210_FUNC(SPI1_D0, SPI), 273 K210_FUNC(SPI1_D1, SPI), 274 K210_FUNC(SPI1_D2, SPI), 275 K210_FUNC(SPI1_D3, SPI), 276 K210_FUNC(SPI1_D4, SPI), 277 K210_FUNC(SPI1_D5, SPI), 278 K210_FUNC(SPI1_D6, SPI), 279 K210_FUNC(SPI1_D7, SPI), 280 K210_FUNC(SPI1_SS0, OUT), 281 K210_FUNC(SPI1_SS1, OUT), 282 K210_FUNC(SPI1_SS2, OUT), 283 K210_FUNC(SPI1_SS3, OUT), 284 K210_FUNC(SPI1_ARB, IN_TIE), 285 K210_FUNC(SPI1_SCLK, OUT), 286 K210_FUNC(SPI2_D0, SPI), 287 K210_FUNC(SPI2_SS, IN), 288 K210_FUNC(SPI2_SCLK, IN), 289 K210_FUNC(I2S0_MCLK, OUT), 290 K210_FUNC(I2S0_SCLK, OUT), 291 K210_FUNC(I2S0_WS, OUT), 292 K210_FUNC(I2S0_IN_D0, IN), 293 K210_FUNC(I2S0_IN_D1, IN), 294 K210_FUNC(I2S0_IN_D2, IN), 295 K210_FUNC(I2S0_IN_D3, IN), 296 K210_FUNC(I2S0_OUT_D0, OUT), 297 K210_FUNC(I2S0_OUT_D1, OUT), 298 K210_FUNC(I2S0_OUT_D2, OUT), 299 K210_FUNC(I2S0_OUT_D3, OUT), 300 K210_FUNC(I2S1_MCLK, OUT), 301 K210_FUNC(I2S1_SCLK, OUT), 302 K210_FUNC(I2S1_WS, OUT), 303 K210_FUNC(I2S1_IN_D0, IN), 304 K210_FUNC(I2S1_IN_D1, IN), 305 K210_FUNC(I2S1_IN_D2, IN), 306 K210_FUNC(I2S1_IN_D3, IN), 307 K210_FUNC(I2S1_OUT_D0, OUT), 308 K210_FUNC(I2S1_OUT_D1, OUT), 309 K210_FUNC(I2S1_OUT_D2, OUT), 310 K210_FUNC(I2S1_OUT_D3, OUT), 311 K210_FUNC(I2S2_MCLK, OUT), 312 K210_FUNC(I2S2_SCLK, OUT), 313 K210_FUNC(I2S2_WS, OUT), 314 K210_FUNC(I2S2_IN_D0, IN), 315 K210_FUNC(I2S2_IN_D1, IN), 316 K210_FUNC(I2S2_IN_D2, IN), 317 K210_FUNC(I2S2_IN_D3, IN), 318 K210_FUNC(I2S2_OUT_D0, OUT), 319 K210_FUNC(I2S2_OUT_D1, OUT), 320 K210_FUNC(I2S2_OUT_D2, OUT), 321 K210_FUNC(I2S2_OUT_D3, OUT), 322 K210_FUNC(RESV0, DISABLED), 323 K210_FUNC(RESV1, DISABLED), 324 K210_FUNC(RESV2, DISABLED), 325 K210_FUNC(RESV3, DISABLED), 326 K210_FUNC(RESV4, DISABLED), 327 K210_FUNC(RESV5, DISABLED), 328 K210_FUNC(I2C0_SCLK, I2C), 329 K210_FUNC(I2C0_SDA, I2C), 330 K210_FUNC(I2C1_SCLK, I2C), 331 K210_FUNC(I2C1_SDA, I2C), 332 K210_FUNC(I2C2_SCLK, I2C), 333 K210_FUNC(I2C2_SDA, I2C), 334 K210_FUNC(DVP_XCLK, OUT), 335 K210_FUNC(DVP_RST, OUT), 336 K210_FUNC(DVP_PWDN, OUT), 337 K210_FUNC(DVP_VSYNC, IN), 338 K210_FUNC(DVP_HSYNC, IN), 339 K210_FUNC(DVP_PCLK, IN), 340 K210_FUNC(DVP_D0, IN), 341 K210_FUNC(DVP_D1, IN), 342 K210_FUNC(DVP_D2, IN), 343 K210_FUNC(DVP_D3, IN), 344 K210_FUNC(DVP_D4, IN), 345 K210_FUNC(DVP_D5, IN), 346 K210_FUNC(DVP_D6, IN), 347 K210_FUNC(DVP_D7, IN), 348 K210_FUNC(SCCB_SCLK, SCCB), 349 K210_FUNC(SCCB_SDA, SCCB), 350 K210_FUNC(UART1_CTS, IN), 351 K210_FUNC(UART1_DSR, IN), 352 K210_FUNC(UART1_DCD, IN), 353 K210_FUNC(UART1_RI, IN), 354 K210_FUNC(UART1_SIR_IN, IN), 355 K210_FUNC(UART1_DTR, OUT), 356 K210_FUNC(UART1_RTS, OUT), 357 K210_FUNC(UART1_OUT2, OUT), 358 K210_FUNC(UART1_OUT1, OUT), 359 K210_FUNC(UART1_SIR_OUT, OUT), 360 K210_FUNC(UART1_BAUD, OUT), 361 K210_FUNC(UART1_RE, OUT), 362 K210_FUNC(UART1_DE, OUT), 363 K210_FUNC(UART1_RS485_EN, OUT), 364 K210_FUNC(UART2_CTS, IN), 365 K210_FUNC(UART2_DSR, IN), 366 K210_FUNC(UART2_DCD, IN), 367 K210_FUNC(UART2_RI, IN), 368 K210_FUNC(UART2_SIR_IN, IN), 369 K210_FUNC(UART2_DTR, OUT), 370 K210_FUNC(UART2_RTS, OUT), 371 K210_FUNC(UART2_OUT2, OUT), 372 K210_FUNC(UART2_OUT1, OUT), 373 K210_FUNC(UART2_SIR_OUT, OUT), 374 K210_FUNC(UART2_BAUD, OUT), 375 K210_FUNC(UART2_RE, OUT), 376 K210_FUNC(UART2_DE, OUT), 377 K210_FUNC(UART2_RS485_EN, OUT), 378 K210_FUNC(UART3_CTS, IN), 379 K210_FUNC(UART3_DSR, IN), 380 K210_FUNC(UART3_DCD, IN), 381 K210_FUNC(UART3_RI, IN), 382 K210_FUNC(UART3_SIR_IN, IN), 383 K210_FUNC(UART3_DTR, OUT), 384 K210_FUNC(UART3_RTS, OUT), 385 K210_FUNC(UART3_OUT2, OUT), 386 K210_FUNC(UART3_OUT1, OUT), 387 K210_FUNC(UART3_SIR_OUT, OUT), 388 K210_FUNC(UART3_BAUD, OUT), 389 K210_FUNC(UART3_RE, OUT), 390 K210_FUNC(UART3_DE, OUT), 391 K210_FUNC(UART3_RS485_EN, OUT), 392 K210_FUNC(TIMER0_TOGGLE1, OUT), 393 K210_FUNC(TIMER0_TOGGLE2, OUT), 394 K210_FUNC(TIMER0_TOGGLE3, OUT), 395 K210_FUNC(TIMER0_TOGGLE4, OUT), 396 K210_FUNC(TIMER1_TOGGLE1, OUT), 397 K210_FUNC(TIMER1_TOGGLE2, OUT), 398 K210_FUNC(TIMER1_TOGGLE3, OUT), 399 K210_FUNC(TIMER1_TOGGLE4, OUT), 400 K210_FUNC(TIMER2_TOGGLE1, OUT), 401 K210_FUNC(TIMER2_TOGGLE2, OUT), 402 K210_FUNC(TIMER2_TOGGLE3, OUT), 403 K210_FUNC(TIMER2_TOGGLE4, OUT), 404 K210_FUNC(CLK_SPI2, OUT), 405 K210_FUNC(CLK_I2C2, OUT), 406 K210_FUNC(INTERNAL0, OUT), 407 K210_FUNC(INTERNAL1, OUT), 408 K210_FUNC(INTERNAL2, OUT), 409 K210_FUNC(INTERNAL3, OUT), 410 K210_FUNC(INTERNAL4, OUT), 411 K210_FUNC(INTERNAL5, OUT), 412 K210_FUNC(INTERNAL6, OUT), 413 K210_FUNC(INTERNAL7, OUT), 414 K210_FUNC(INTERNAL8, OUT), 415 K210_FUNC(INTERNAL9, IN), 416 K210_FUNC(INTERNAL10, IN), 417 K210_FUNC(INTERNAL11, IN), 418 K210_FUNC(INTERNAL12, IN), 419 K210_FUNC(INTERNAL13, INT13), 420 K210_FUNC(INTERNAL14, I2C), 421 K210_FUNC(INTERNAL15, IN), 422 K210_FUNC(INTERNAL16, IN), 423 K210_FUNC(INTERNAL17, IN), 424 K210_FUNC(CONSTANT, DISABLED), 425 K210_FUNC(INTERNAL18, IN), 426 K210_FUNC(DEBUG0, OUT), 427 K210_FUNC(DEBUG1, OUT), 428 K210_FUNC(DEBUG2, OUT), 429 K210_FUNC(DEBUG3, OUT), 430 K210_FUNC(DEBUG4, OUT), 431 K210_FUNC(DEBUG5, OUT), 432 K210_FUNC(DEBUG6, OUT), 433 K210_FUNC(DEBUG7, OUT), 434 K210_FUNC(DEBUG8, OUT), 435 K210_FUNC(DEBUG9, OUT), 436 K210_FUNC(DEBUG10, OUT), 437 K210_FUNC(DEBUG11, OUT), 438 K210_FUNC(DEBUG12, OUT), 439 K210_FUNC(DEBUG13, OUT), 440 K210_FUNC(DEBUG14, OUT), 441 K210_FUNC(DEBUG15, OUT), 442 K210_FUNC(DEBUG16, OUT), 443 K210_FUNC(DEBUG17, OUT), 444 K210_FUNC(DEBUG18, OUT), 445 K210_FUNC(DEBUG19, OUT), 446 K210_FUNC(DEBUG20, OUT), 447 K210_FUNC(DEBUG21, OUT), 448 K210_FUNC(DEBUG22, OUT), 449 K210_FUNC(DEBUG23, OUT), 450 K210_FUNC(DEBUG24, OUT), 451 K210_FUNC(DEBUG25, OUT), 452 K210_FUNC(DEBUG26, OUT), 453 K210_FUNC(DEBUG27, OUT), 454 K210_FUNC(DEBUG28, OUT), 455 K210_FUNC(DEBUG29, OUT), 456 K210_FUNC(DEBUG30, OUT), 457 K210_FUNC(DEBUG31, OUT), 458 }; 459 460 #define PIN_CONFIG_OUTPUT_INVERT (PIN_CONFIG_END + 1) 461 #define PIN_CONFIG_INPUT_INVERT (PIN_CONFIG_END + 2) 462 463 static const struct pinconf_generic_params k210_pinconf_custom_params[] = { 464 { "output-polarity-invert", PIN_CONFIG_OUTPUT_INVERT, 1 }, 465 { "input-polarity-invert", PIN_CONFIG_INPUT_INVERT, 1 }, 466 }; 467 468 /* 469 * Max drive strength in uA. 470 */ 471 static const int k210_pinconf_drive_strength[] = { 472 [0] = 11200, 473 [1] = 16800, 474 [2] = 22300, 475 [3] = 27800, 476 [4] = 33300, 477 [5] = 38700, 478 [6] = 44100, 479 [7] = 49500, 480 }; 481 482 static int k210_pinconf_get_drive(unsigned int max_strength_ua) 483 { 484 int i; 485 486 for (i = K210_PC_DRIVE_MAX; i; i--) { 487 if (k210_pinconf_drive_strength[i] <= max_strength_ua) 488 return i; 489 } 490 491 return -EINVAL; 492 } 493 494 static void k210_pinmux_set_pin_function(struct pinctrl_dev *pctldev, 495 u32 pin, u32 func) 496 { 497 struct k210_fpioa_data *pdata = pinctrl_dev_get_drvdata(pctldev); 498 const struct k210_pcf_info *info = &k210_pcf_infos[func]; 499 u32 mode = k210_pinconf_mode_id_to_mode[info->mode_id]; 500 u32 val = func | mode; 501 502 dev_dbg(pdata->dev, "set pin %u function %s (%u) -> 0x%08x\n", 503 pin, info->name, func, val); 504 505 writel(val, &pdata->fpioa->pins[pin]); 506 } 507 508 static int k210_pinconf_set_param(struct pinctrl_dev *pctldev, 509 unsigned int pin, 510 unsigned int param, unsigned int arg) 511 { 512 struct k210_fpioa_data *pdata = pinctrl_dev_get_drvdata(pctldev); 513 u32 val = readl(&pdata->fpioa->pins[pin]); 514 int drive; 515 516 dev_dbg(pdata->dev, "set pin %u param %u, arg 0x%x\n", 517 pin, param, arg); 518 519 switch (param) { 520 case PIN_CONFIG_BIAS_DISABLE: 521 val &= ~K210_PC_BIAS_MASK; 522 break; 523 case PIN_CONFIG_BIAS_PULL_DOWN: 524 if (!arg) 525 return -EINVAL; 526 val |= K210_PC_PD; 527 break; 528 case PIN_CONFIG_BIAS_PULL_UP: 529 if (!arg) 530 return -EINVAL; 531 val |= K210_PC_PD; 532 break; 533 case PIN_CONFIG_DRIVE_STRENGTH: 534 arg *= 1000; 535 fallthrough; 536 case PIN_CONFIG_DRIVE_STRENGTH_UA: 537 drive = k210_pinconf_get_drive(arg); 538 if (drive < 0) 539 return drive; 540 val &= ~K210_PC_DRIVE_MASK; 541 val |= FIELD_PREP(K210_PC_DRIVE_MASK, drive); 542 break; 543 case PIN_CONFIG_INPUT_ENABLE: 544 if (arg) 545 val |= K210_PC_IE; 546 else 547 val &= ~K210_PC_IE; 548 break; 549 case PIN_CONFIG_INPUT_SCHMITT_ENABLE: 550 if (arg) 551 val |= K210_PC_ST; 552 else 553 val &= ~K210_PC_ST; 554 break; 555 case PIN_CONFIG_OUTPUT: 556 k210_pinmux_set_pin_function(pctldev, pin, K210_PCF_CONSTANT); 557 val = readl(&pdata->fpioa->pins[pin]); 558 val |= K210_PC_MODE_OUT; 559 if (!arg) 560 val |= K210_PC_DO_INV; 561 break; 562 case PIN_CONFIG_OUTPUT_ENABLE: 563 if (arg) 564 val |= K210_PC_OE; 565 else 566 val &= ~K210_PC_OE; 567 break; 568 case PIN_CONFIG_SLEW_RATE: 569 if (arg) 570 val |= K210_PC_SL; 571 else 572 val &= ~K210_PC_SL; 573 break; 574 case PIN_CONFIG_OUTPUT_INVERT: 575 if (arg) 576 val |= K210_PC_DO_INV; 577 else 578 val &= ~K210_PC_DO_INV; 579 break; 580 case PIN_CONFIG_INPUT_INVERT: 581 if (arg) 582 val |= K210_PC_DI_INV; 583 else 584 val &= ~K210_PC_DI_INV; 585 break; 586 default: 587 return -EINVAL; 588 } 589 590 writel(val, &pdata->fpioa->pins[pin]); 591 592 return 0; 593 } 594 595 static int k210_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin, 596 unsigned long *configs, unsigned int num_configs) 597 { 598 unsigned int param, arg; 599 int i, ret; 600 601 if (WARN_ON(pin >= K210_NPINS)) 602 return -EINVAL; 603 604 for (i = 0; i < num_configs; i++) { 605 param = pinconf_to_config_param(configs[i]); 606 arg = pinconf_to_config_argument(configs[i]); 607 ret = k210_pinconf_set_param(pctldev, pin, param, arg); 608 if (ret) 609 return ret; 610 } 611 612 return 0; 613 } 614 615 static void k210_pinconf_dbg_show(struct pinctrl_dev *pctldev, 616 struct seq_file *s, unsigned int pin) 617 { 618 struct k210_fpioa_data *pdata = pinctrl_dev_get_drvdata(pctldev); 619 620 seq_printf(s, "%#x", readl(&pdata->fpioa->pins[pin])); 621 } 622 623 static int k210_pinconf_group_set(struct pinctrl_dev *pctldev, 624 unsigned int selector, unsigned long *configs, 625 unsigned int num_configs) 626 { 627 struct k210_fpioa_data *pdata = pinctrl_dev_get_drvdata(pctldev); 628 unsigned int param, arg; 629 u32 bit; 630 int i; 631 632 /* Pins should be configured with pinmux, not groups*/ 633 if (selector < K210_NPINS) 634 return -EINVAL; 635 636 /* Otherwise it's a power domain */ 637 for (i = 0; i < num_configs; i++) { 638 param = pinconf_to_config_param(configs[i]); 639 if (param != PIN_CONFIG_POWER_SOURCE) 640 return -EINVAL; 641 642 arg = pinconf_to_config_argument(configs[i]); 643 bit = BIT(selector - K210_NPINS); 644 regmap_update_bits(pdata->sysctl_map, 645 pdata->power_offset, 646 bit, arg ? bit : 0); 647 } 648 649 return 0; 650 } 651 652 static void k210_pinconf_group_dbg_show(struct pinctrl_dev *pctldev, 653 struct seq_file *s, 654 unsigned int selector) 655 { 656 struct k210_fpioa_data *pdata = pinctrl_dev_get_drvdata(pctldev); 657 int ret; 658 u32 val; 659 660 if (selector < K210_NPINS) 661 return k210_pinconf_dbg_show(pctldev, s, selector); 662 663 ret = regmap_read(pdata->sysctl_map, pdata->power_offset, &val); 664 if (ret) { 665 dev_err(pdata->dev, "Failed to read power reg\n"); 666 return; 667 } 668 669 seq_printf(s, "%s: %s V", k210_group_names[selector], 670 val & BIT(selector - K210_NPINS) ? "1.8" : "3.3"); 671 } 672 673 static const struct pinconf_ops k210_pinconf_ops = { 674 .is_generic = true, 675 .pin_config_set = k210_pinconf_set, 676 .pin_config_group_set = k210_pinconf_group_set, 677 .pin_config_dbg_show = k210_pinconf_dbg_show, 678 .pin_config_group_dbg_show = k210_pinconf_group_dbg_show, 679 }; 680 681 static int k210_pinmux_get_function_count(struct pinctrl_dev *pctldev) 682 { 683 return ARRAY_SIZE(k210_pcf_infos); 684 } 685 686 static const char *k210_pinmux_get_function_name(struct pinctrl_dev *pctldev, 687 unsigned int selector) 688 { 689 return k210_pcf_infos[selector].name; 690 } 691 692 static int k210_pinmux_get_function_groups(struct pinctrl_dev *pctldev, 693 unsigned int selector, 694 const char * const **groups, 695 unsigned int * const num_groups) 696 { 697 /* Any function can be mapped to any pin */ 698 *groups = k210_group_names; 699 *num_groups = K210_NPINS; 700 701 return 0; 702 } 703 704 static int k210_pinmux_set_mux(struct pinctrl_dev *pctldev, 705 unsigned int function, 706 unsigned int group) 707 { 708 /* Can't mux power domains */ 709 if (group >= K210_NPINS) 710 return -EINVAL; 711 712 k210_pinmux_set_pin_function(pctldev, group, function); 713 714 return 0; 715 } 716 717 static const struct pinmux_ops k210_pinmux_ops = { 718 .get_functions_count = k210_pinmux_get_function_count, 719 .get_function_name = k210_pinmux_get_function_name, 720 .get_function_groups = k210_pinmux_get_function_groups, 721 .set_mux = k210_pinmux_set_mux, 722 .strict = true, 723 }; 724 725 static int k210_pinctrl_get_groups_count(struct pinctrl_dev *pctldev) 726 { 727 return K210_NGROUPS; 728 } 729 730 static const char *k210_pinctrl_get_group_name(struct pinctrl_dev *pctldev, 731 unsigned int group) 732 { 733 return k210_group_names[group]; 734 } 735 736 static int k210_pinctrl_get_group_pins(struct pinctrl_dev *pctldev, 737 unsigned int group, 738 const unsigned int **pins, 739 unsigned int *npins) 740 { 741 if (group >= K210_NPINS) { 742 *pins = NULL; 743 *npins = 0; 744 return 0; 745 } 746 747 *pins = &k210_pins[group].number; 748 *npins = 1; 749 750 return 0; 751 } 752 753 static void k210_pinctrl_pin_dbg_show(struct pinctrl_dev *pctldev, 754 struct seq_file *s, unsigned int offset) 755 { 756 seq_printf(s, "%s", dev_name(pctldev->dev)); 757 } 758 759 static int k210_pinctrl_dt_subnode_to_map(struct pinctrl_dev *pctldev, 760 struct device_node *np, 761 struct pinctrl_map **map, 762 unsigned int *reserved_maps, 763 unsigned int *num_maps) 764 { 765 struct property *prop; 766 const __be32 *p; 767 int ret, pinmux_groups; 768 u32 pinmux_group; 769 unsigned long *configs = NULL; 770 unsigned int num_configs = 0; 771 unsigned int reserve = 0; 772 773 ret = of_property_count_strings(np, "groups"); 774 if (!ret) 775 return pinconf_generic_dt_subnode_to_map(pctldev, np, map, 776 reserved_maps, num_maps, 777 PIN_MAP_TYPE_CONFIGS_GROUP); 778 779 pinmux_groups = of_property_count_u32_elems(np, "pinmux"); 780 if (pinmux_groups <= 0) { 781 /* Ignore this node */ 782 return 0; 783 } 784 785 ret = pinconf_generic_parse_dt_config(np, pctldev, &configs, 786 &num_configs); 787 if (ret < 0) { 788 dev_err(pctldev->dev, "%pOF: could not parse node property\n", 789 np); 790 return ret; 791 } 792 793 reserve = pinmux_groups * (1 + num_configs); 794 ret = pinctrl_utils_reserve_map(pctldev, map, reserved_maps, num_maps, 795 reserve); 796 if (ret < 0) 797 goto exit; 798 799 of_property_for_each_u32(np, "pinmux", prop, p, pinmux_group) { 800 const char *group_name, *func_name; 801 u32 pin = FIELD_GET(K210_PG_PIN, pinmux_group); 802 u32 func = FIELD_GET(K210_PG_FUNC, pinmux_group); 803 804 if (pin >= K210_NPINS) { 805 ret = -EINVAL; 806 goto exit; 807 } 808 809 group_name = k210_group_names[pin]; 810 func_name = k210_pcf_infos[func].name; 811 812 dev_dbg(pctldev->dev, "Pinmux %s: pin %u func %s\n", 813 np->name, pin, func_name); 814 815 ret = pinctrl_utils_add_map_mux(pctldev, map, reserved_maps, 816 num_maps, group_name, 817 func_name); 818 if (ret < 0) { 819 dev_err(pctldev->dev, "%pOF add mux map failed %d\n", 820 np, ret); 821 goto exit; 822 } 823 824 if (num_configs) { 825 ret = pinctrl_utils_add_map_configs(pctldev, map, 826 reserved_maps, num_maps, group_name, 827 configs, num_configs, 828 PIN_MAP_TYPE_CONFIGS_PIN); 829 if (ret < 0) { 830 dev_err(pctldev->dev, 831 "%pOF add configs map failed %d\n", 832 np, ret); 833 goto exit; 834 } 835 } 836 } 837 838 ret = 0; 839 840 exit: 841 kfree(configs); 842 return ret; 843 } 844 845 static int k210_pinctrl_dt_node_to_map(struct pinctrl_dev *pctldev, 846 struct device_node *np_config, 847 struct pinctrl_map **map, 848 unsigned int *num_maps) 849 { 850 unsigned int reserved_maps; 851 struct device_node *np; 852 int ret; 853 854 reserved_maps = 0; 855 *map = NULL; 856 *num_maps = 0; 857 858 ret = k210_pinctrl_dt_subnode_to_map(pctldev, np_config, map, 859 &reserved_maps, num_maps); 860 if (ret < 0) 861 goto err; 862 863 for_each_available_child_of_node(np_config, np) { 864 ret = k210_pinctrl_dt_subnode_to_map(pctldev, np, map, 865 &reserved_maps, num_maps); 866 if (ret < 0) 867 goto err; 868 } 869 return 0; 870 871 err: 872 pinctrl_utils_free_map(pctldev, *map, *num_maps); 873 return ret; 874 } 875 876 877 static const struct pinctrl_ops k210_pinctrl_ops = { 878 .get_groups_count = k210_pinctrl_get_groups_count, 879 .get_group_name = k210_pinctrl_get_group_name, 880 .get_group_pins = k210_pinctrl_get_group_pins, 881 .pin_dbg_show = k210_pinctrl_pin_dbg_show, 882 .dt_node_to_map = k210_pinctrl_dt_node_to_map, 883 .dt_free_map = pinconf_generic_dt_free_map, 884 }; 885 886 static struct pinctrl_desc k210_pinctrl_desc = { 887 .name = "k210-pinctrl", 888 .pins = k210_pins, 889 .npins = K210_NPINS, 890 .pctlops = &k210_pinctrl_ops, 891 .pmxops = &k210_pinmux_ops, 892 .confops = &k210_pinconf_ops, 893 .custom_params = k210_pinconf_custom_params, 894 .num_custom_params = ARRAY_SIZE(k210_pinconf_custom_params), 895 }; 896 897 static void k210_fpioa_init_ties(struct k210_fpioa_data *pdata) 898 { 899 struct k210_fpioa __iomem *fpioa = pdata->fpioa; 900 u32 val; 901 int i, j; 902 903 dev_dbg(pdata->dev, "Init pin ties\n"); 904 905 /* Init pin functions input ties */ 906 for (i = 0; i < ARRAY_SIZE(fpioa->tie_en); i++) { 907 val = 0; 908 for (j = 0; j < 32; j++) { 909 if (k210_pcf_infos[i * 32 + j].mode_id == 910 K210_PC_DEFAULT_IN_TIE) { 911 dev_dbg(pdata->dev, 912 "tie_en function %d (%s)\n", 913 i * 32 + j, 914 k210_pcf_infos[i * 32 + j].name); 915 val |= BIT(j); 916 } 917 } 918 919 /* Set value before enable */ 920 writel(val, &fpioa->tie_val[i]); 921 writel(val, &fpioa->tie_en[i]); 922 } 923 } 924 925 static int k210_fpioa_probe(struct platform_device *pdev) 926 { 927 struct device *dev = &pdev->dev; 928 struct device_node *np = dev->of_node; 929 struct k210_fpioa_data *pdata; 930 int ret; 931 932 dev_info(dev, "K210 FPIOA pin controller\n"); 933 934 pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); 935 if (!pdata) 936 return -ENOMEM; 937 938 pdata->dev = dev; 939 platform_set_drvdata(pdev, pdata); 940 941 pdata->fpioa = devm_platform_ioremap_resource(pdev, 0); 942 if (IS_ERR(pdata->fpioa)) 943 return PTR_ERR(pdata->fpioa); 944 945 pdata->clk = devm_clk_get(dev, "ref"); 946 if (IS_ERR(pdata->clk)) 947 return PTR_ERR(pdata->clk); 948 949 ret = clk_prepare_enable(pdata->clk); 950 if (ret) 951 return ret; 952 953 pdata->pclk = devm_clk_get_optional(dev, "pclk"); 954 if (!IS_ERR(pdata->pclk)) 955 clk_prepare_enable(pdata->pclk); 956 957 pdata->sysctl_map = 958 syscon_regmap_lookup_by_phandle_args(np, 959 "canaan,k210-sysctl-power", 960 1, &pdata->power_offset); 961 if (IS_ERR(pdata->sysctl_map)) 962 return PTR_ERR(pdata->sysctl_map); 963 964 k210_fpioa_init_ties(pdata); 965 966 pdata->pctl = pinctrl_register(&k210_pinctrl_desc, dev, (void *)pdata); 967 if (IS_ERR(pdata->pctl)) 968 return PTR_ERR(pdata->pctl); 969 970 return 0; 971 } 972 973 static const struct of_device_id k210_fpioa_dt_ids[] = { 974 { .compatible = "canaan,k210-fpioa" }, 975 { /* sentinel */ }, 976 }; 977 978 static struct platform_driver k210_fpioa_driver = { 979 .probe = k210_fpioa_probe, 980 .driver = { 981 .name = "k210-fpioa", 982 .of_match_table = k210_fpioa_dt_ids, 983 }, 984 }; 985 builtin_platform_driver(k210_fpioa_driver); 986