1 /* 2 * Pinctrl GPIO driver for Intel Baytrail 3 * Copyright (c) 2012-2013, Intel Corporation. 4 * 5 * Author: Mathias Nyman <mathias.nyman@linux.intel.com> 6 * 7 * This program is free software; you can redistribute it and/or modify it 8 * under the terms and conditions of the GNU General Public License, 9 * version 2, as published by the Free Software Foundation. 10 * 11 * This program is distributed in the hope it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 14 * more details. 15 */ 16 17 #include <linux/kernel.h> 18 #include <linux/module.h> 19 #include <linux/init.h> 20 #include <linux/types.h> 21 #include <linux/bitops.h> 22 #include <linux/interrupt.h> 23 #include <linux/gpio.h> 24 #include <linux/gpio/driver.h> 25 #include <linux/acpi.h> 26 #include <linux/platform_device.h> 27 #include <linux/seq_file.h> 28 #include <linux/io.h> 29 #include <linux/pm_runtime.h> 30 #include <linux/pinctrl/pinctrl.h> 31 #include <linux/pinctrl/pinmux.h> 32 #include <linux/pinctrl/pinconf.h> 33 #include <linux/pinctrl/pinconf-generic.h> 34 35 /* memory mapped register offsets */ 36 #define BYT_CONF0_REG 0x000 37 #define BYT_CONF1_REG 0x004 38 #define BYT_VAL_REG 0x008 39 #define BYT_DFT_REG 0x00c 40 #define BYT_INT_STAT_REG 0x800 41 #define BYT_DEBOUNCE_REG 0x9d0 42 43 /* BYT_CONF0_REG register bits */ 44 #define BYT_IODEN BIT(31) 45 #define BYT_DIRECT_IRQ_EN BIT(27) 46 #define BYT_TRIG_NEG BIT(26) 47 #define BYT_TRIG_POS BIT(25) 48 #define BYT_TRIG_LVL BIT(24) 49 #define BYT_DEBOUNCE_EN BIT(20) 50 #define BYT_PULL_STR_SHIFT 9 51 #define BYT_PULL_STR_MASK (3 << BYT_PULL_STR_SHIFT) 52 #define BYT_PULL_STR_2K (0 << BYT_PULL_STR_SHIFT) 53 #define BYT_PULL_STR_10K (1 << BYT_PULL_STR_SHIFT) 54 #define BYT_PULL_STR_20K (2 << BYT_PULL_STR_SHIFT) 55 #define BYT_PULL_STR_40K (3 << BYT_PULL_STR_SHIFT) 56 #define BYT_PULL_ASSIGN_SHIFT 7 57 #define BYT_PULL_ASSIGN_MASK (3 << BYT_PULL_ASSIGN_SHIFT) 58 #define BYT_PULL_ASSIGN_UP (1 << BYT_PULL_ASSIGN_SHIFT) 59 #define BYT_PULL_ASSIGN_DOWN (2 << BYT_PULL_ASSIGN_SHIFT) 60 #define BYT_PIN_MUX 0x07 61 62 /* BYT_VAL_REG register bits */ 63 #define BYT_INPUT_EN BIT(2) /* 0: input enabled (active low)*/ 64 #define BYT_OUTPUT_EN BIT(1) /* 0: output enabled (active low)*/ 65 #define BYT_LEVEL BIT(0) 66 67 #define BYT_DIR_MASK (BIT(1) | BIT(2)) 68 #define BYT_TRIG_MASK (BIT(26) | BIT(25) | BIT(24)) 69 70 #define BYT_CONF0_RESTORE_MASK (BYT_DIRECT_IRQ_EN | BYT_TRIG_MASK | \ 71 BYT_PIN_MUX) 72 #define BYT_VAL_RESTORE_MASK (BYT_DIR_MASK | BYT_LEVEL) 73 74 /* BYT_DEBOUNCE_REG bits */ 75 #define BYT_DEBOUNCE_PULSE_MASK 0x7 76 #define BYT_DEBOUNCE_PULSE_375US 1 77 #define BYT_DEBOUNCE_PULSE_750US 2 78 #define BYT_DEBOUNCE_PULSE_1500US 3 79 #define BYT_DEBOUNCE_PULSE_3MS 4 80 #define BYT_DEBOUNCE_PULSE_6MS 5 81 #define BYT_DEBOUNCE_PULSE_12MS 6 82 #define BYT_DEBOUNCE_PULSE_24MS 7 83 84 #define BYT_NGPIO_SCORE 102 85 #define BYT_NGPIO_NCORE 28 86 #define BYT_NGPIO_SUS 44 87 88 #define BYT_SCORE_ACPI_UID "1" 89 #define BYT_NCORE_ACPI_UID "2" 90 #define BYT_SUS_ACPI_UID "3" 91 92 /* 93 * This is the function value most pins have for GPIO muxing. If the value 94 * differs from the default one, it must be explicitly mentioned. Otherwise, the 95 * pin control implementation will set the muxing value to default GPIO if it 96 * does not find a match for the requested function. 97 */ 98 #define BYT_DEFAULT_GPIO_MUX 0 99 100 struct byt_gpio_pin_context { 101 u32 conf0; 102 u32 val; 103 }; 104 105 struct byt_simple_func_mux { 106 const char *name; 107 unsigned short func; 108 }; 109 110 struct byt_mixed_func_mux { 111 const char *name; 112 const unsigned short *func_values; 113 }; 114 115 struct byt_pingroup { 116 const char *name; 117 const unsigned int *pins; 118 size_t npins; 119 unsigned short has_simple_funcs; 120 union { 121 const struct byt_simple_func_mux *simple_funcs; 122 const struct byt_mixed_func_mux *mixed_funcs; 123 }; 124 size_t nfuncs; 125 }; 126 127 struct byt_function { 128 const char *name; 129 const char * const *groups; 130 size_t ngroups; 131 }; 132 133 struct byt_community { 134 unsigned int pin_base; 135 size_t npins; 136 const unsigned int *pad_map; 137 void __iomem *reg_base; 138 }; 139 140 #define SIMPLE_FUNC(n, f) \ 141 { \ 142 .name = (n), \ 143 .func = (f), \ 144 } 145 #define MIXED_FUNC(n, f) \ 146 { \ 147 .name = (n), \ 148 .func_values = (f), \ 149 } 150 151 #define PIN_GROUP_SIMPLE(n, p, f) \ 152 { \ 153 .name = (n), \ 154 .pins = (p), \ 155 .npins = ARRAY_SIZE((p)), \ 156 .has_simple_funcs = 1, \ 157 { \ 158 .simple_funcs = (f), \ 159 }, \ 160 .nfuncs = ARRAY_SIZE((f)), \ 161 } 162 #define PIN_GROUP_MIXED(n, p, f) \ 163 { \ 164 .name = (n), \ 165 .pins = (p), \ 166 .npins = ARRAY_SIZE((p)), \ 167 .has_simple_funcs = 0, \ 168 { \ 169 .mixed_funcs = (f), \ 170 }, \ 171 .nfuncs = ARRAY_SIZE((f)), \ 172 } 173 174 #define FUNCTION(n, g) \ 175 { \ 176 .name = (n), \ 177 .groups = (g), \ 178 .ngroups = ARRAY_SIZE((g)), \ 179 } 180 181 #define COMMUNITY(p, n, map) \ 182 { \ 183 .pin_base = (p), \ 184 .npins = (n), \ 185 .pad_map = (map),\ 186 } 187 188 struct byt_pinctrl_soc_data { 189 const char *uid; 190 const struct pinctrl_pin_desc *pins; 191 size_t npins; 192 const struct byt_pingroup *groups; 193 size_t ngroups; 194 const struct byt_function *functions; 195 size_t nfunctions; 196 const struct byt_community *communities; 197 size_t ncommunities; 198 }; 199 200 struct byt_gpio { 201 struct gpio_chip chip; 202 struct platform_device *pdev; 203 struct pinctrl_dev *pctl_dev; 204 struct pinctrl_desc pctl_desc; 205 raw_spinlock_t lock; 206 const struct byt_pinctrl_soc_data *soc_data; 207 struct byt_community *communities_copy; 208 struct byt_gpio_pin_context *saved_context; 209 }; 210 211 /* SCORE pins, aka GPIOC_<pin_no> or GPIO_S0_SC[<pin_no>] */ 212 static const struct pinctrl_pin_desc byt_score_pins[] = { 213 PINCTRL_PIN(0, "SATA_GP0"), 214 PINCTRL_PIN(1, "SATA_GP1"), 215 PINCTRL_PIN(2, "SATA_LED#"), 216 PINCTRL_PIN(3, "PCIE_CLKREQ0"), 217 PINCTRL_PIN(4, "PCIE_CLKREQ1"), 218 PINCTRL_PIN(5, "PCIE_CLKREQ2"), 219 PINCTRL_PIN(6, "PCIE_CLKREQ3"), 220 PINCTRL_PIN(7, "SD3_WP"), 221 PINCTRL_PIN(8, "HDA_RST"), 222 PINCTRL_PIN(9, "HDA_SYNC"), 223 PINCTRL_PIN(10, "HDA_CLK"), 224 PINCTRL_PIN(11, "HDA_SDO"), 225 PINCTRL_PIN(12, "HDA_SDI0"), 226 PINCTRL_PIN(13, "HDA_SDI1"), 227 PINCTRL_PIN(14, "GPIO_S0_SC14"), 228 PINCTRL_PIN(15, "GPIO_S0_SC15"), 229 PINCTRL_PIN(16, "MMC1_CLK"), 230 PINCTRL_PIN(17, "MMC1_D0"), 231 PINCTRL_PIN(18, "MMC1_D1"), 232 PINCTRL_PIN(19, "MMC1_D2"), 233 PINCTRL_PIN(20, "MMC1_D3"), 234 PINCTRL_PIN(21, "MMC1_D4"), 235 PINCTRL_PIN(22, "MMC1_D5"), 236 PINCTRL_PIN(23, "MMC1_D6"), 237 PINCTRL_PIN(24, "MMC1_D7"), 238 PINCTRL_PIN(25, "MMC1_CMD"), 239 PINCTRL_PIN(26, "MMC1_RST"), 240 PINCTRL_PIN(27, "SD2_CLK"), 241 PINCTRL_PIN(28, "SD2_D0"), 242 PINCTRL_PIN(29, "SD2_D1"), 243 PINCTRL_PIN(30, "SD2_D2"), 244 PINCTRL_PIN(31, "SD2_D3_CD"), 245 PINCTRL_PIN(32, "SD2_CMD"), 246 PINCTRL_PIN(33, "SD3_CLK"), 247 PINCTRL_PIN(34, "SD3_D0"), 248 PINCTRL_PIN(35, "SD3_D1"), 249 PINCTRL_PIN(36, "SD3_D2"), 250 PINCTRL_PIN(37, "SD3_D3"), 251 PINCTRL_PIN(38, "SD3_CD"), 252 PINCTRL_PIN(39, "SD3_CMD"), 253 PINCTRL_PIN(40, "SD3_1P8EN"), 254 PINCTRL_PIN(41, "SD3_PWREN#"), 255 PINCTRL_PIN(42, "ILB_LPC_AD0"), 256 PINCTRL_PIN(43, "ILB_LPC_AD1"), 257 PINCTRL_PIN(44, "ILB_LPC_AD2"), 258 PINCTRL_PIN(45, "ILB_LPC_AD3"), 259 PINCTRL_PIN(46, "ILB_LPC_FRAME"), 260 PINCTRL_PIN(47, "ILB_LPC_CLK0"), 261 PINCTRL_PIN(48, "ILB_LPC_CLK1"), 262 PINCTRL_PIN(49, "ILB_LPC_CLKRUN"), 263 PINCTRL_PIN(50, "ILB_LPC_SERIRQ"), 264 PINCTRL_PIN(51, "PCU_SMB_DATA"), 265 PINCTRL_PIN(52, "PCU_SMB_CLK"), 266 PINCTRL_PIN(53, "PCU_SMB_ALERT"), 267 PINCTRL_PIN(54, "ILB_8254_SPKR"), 268 PINCTRL_PIN(55, "GPIO_S0_SC55"), 269 PINCTRL_PIN(56, "GPIO_S0_SC56"), 270 PINCTRL_PIN(57, "GPIO_S0_SC57"), 271 PINCTRL_PIN(58, "GPIO_S0_SC58"), 272 PINCTRL_PIN(59, "GPIO_S0_SC59"), 273 PINCTRL_PIN(60, "GPIO_S0_SC60"), 274 PINCTRL_PIN(61, "GPIO_S0_SC61"), 275 PINCTRL_PIN(62, "LPE_I2S2_CLK"), 276 PINCTRL_PIN(63, "LPE_I2S2_FRM"), 277 PINCTRL_PIN(64, "LPE_I2S2_DATAIN"), 278 PINCTRL_PIN(65, "LPE_I2S2_DATAOUT"), 279 PINCTRL_PIN(66, "SIO_SPI_CS"), 280 PINCTRL_PIN(67, "SIO_SPI_MISO"), 281 PINCTRL_PIN(68, "SIO_SPI_MOSI"), 282 PINCTRL_PIN(69, "SIO_SPI_CLK"), 283 PINCTRL_PIN(70, "SIO_UART1_RXD"), 284 PINCTRL_PIN(71, "SIO_UART1_TXD"), 285 PINCTRL_PIN(72, "SIO_UART1_RTS"), 286 PINCTRL_PIN(73, "SIO_UART1_CTS"), 287 PINCTRL_PIN(74, "SIO_UART2_RXD"), 288 PINCTRL_PIN(75, "SIO_UART2_TXD"), 289 PINCTRL_PIN(76, "SIO_UART2_RTS"), 290 PINCTRL_PIN(77, "SIO_UART2_CTS"), 291 PINCTRL_PIN(78, "SIO_I2C0_DATA"), 292 PINCTRL_PIN(79, "SIO_I2C0_CLK"), 293 PINCTRL_PIN(80, "SIO_I2C1_DATA"), 294 PINCTRL_PIN(81, "SIO_I2C1_CLK"), 295 PINCTRL_PIN(82, "SIO_I2C2_DATA"), 296 PINCTRL_PIN(83, "SIO_I2C2_CLK"), 297 PINCTRL_PIN(84, "SIO_I2C3_DATA"), 298 PINCTRL_PIN(85, "SIO_I2C3_CLK"), 299 PINCTRL_PIN(86, "SIO_I2C4_DATA"), 300 PINCTRL_PIN(87, "SIO_I2C4_CLK"), 301 PINCTRL_PIN(88, "SIO_I2C5_DATA"), 302 PINCTRL_PIN(89, "SIO_I2C5_CLK"), 303 PINCTRL_PIN(90, "SIO_I2C6_DATA"), 304 PINCTRL_PIN(91, "SIO_I2C6_CLK"), 305 PINCTRL_PIN(92, "GPIO_S0_SC92"), 306 PINCTRL_PIN(93, "GPIO_S0_SC93"), 307 PINCTRL_PIN(94, "SIO_PWM0"), 308 PINCTRL_PIN(95, "SIO_PWM1"), 309 PINCTRL_PIN(96, "PMC_PLT_CLK0"), 310 PINCTRL_PIN(97, "PMC_PLT_CLK1"), 311 PINCTRL_PIN(98, "PMC_PLT_CLK2"), 312 PINCTRL_PIN(99, "PMC_PLT_CLK3"), 313 PINCTRL_PIN(100, "PMC_PLT_CLK4"), 314 PINCTRL_PIN(101, "PMC_PLT_CLK5"), 315 }; 316 317 static const unsigned int byt_score_pins_map[BYT_NGPIO_SCORE] = { 318 85, 89, 93, 96, 99, 102, 98, 101, 34, 37, 319 36, 38, 39, 35, 40, 84, 62, 61, 64, 59, 320 54, 56, 60, 55, 63, 57, 51, 50, 53, 47, 321 52, 49, 48, 43, 46, 41, 45, 42, 58, 44, 322 95, 105, 70, 68, 67, 66, 69, 71, 65, 72, 323 86, 90, 88, 92, 103, 77, 79, 83, 78, 81, 324 80, 82, 13, 12, 15, 14, 17, 18, 19, 16, 325 2, 1, 0, 4, 6, 7, 9, 8, 33, 32, 326 31, 30, 29, 27, 25, 28, 26, 23, 21, 20, 327 24, 22, 5, 3, 10, 11, 106, 87, 91, 104, 328 97, 100, 329 }; 330 331 /* SCORE groups */ 332 static const unsigned int byt_score_uart1_pins[] = { 70, 71, 72, 73 }; 333 static const unsigned int byt_score_uart2_pins[] = { 74, 75, 76, 77 }; 334 static const struct byt_simple_func_mux byt_score_uart_mux[] = { 335 SIMPLE_FUNC("uart", 1), 336 }; 337 338 static const unsigned int byt_score_pwm0_pins[] = { 94 }; 339 static const unsigned int byt_score_pwm1_pins[] = { 95 }; 340 static const struct byt_simple_func_mux byt_score_pwm_mux[] = { 341 SIMPLE_FUNC("pwm", 1), 342 }; 343 344 static const unsigned int byt_score_sio_spi_pins[] = { 66, 67, 68, 69 }; 345 static const struct byt_simple_func_mux byt_score_spi_mux[] = { 346 SIMPLE_FUNC("spi", 1), 347 }; 348 349 static const unsigned int byt_score_i2c5_pins[] = { 88, 89 }; 350 static const unsigned int byt_score_i2c6_pins[] = { 90, 91 }; 351 static const unsigned int byt_score_i2c4_pins[] = { 86, 87 }; 352 static const unsigned int byt_score_i2c3_pins[] = { 84, 85 }; 353 static const unsigned int byt_score_i2c2_pins[] = { 82, 83 }; 354 static const unsigned int byt_score_i2c1_pins[] = { 80, 81 }; 355 static const unsigned int byt_score_i2c0_pins[] = { 78, 79 }; 356 static const struct byt_simple_func_mux byt_score_i2c_mux[] = { 357 SIMPLE_FUNC("i2c", 1), 358 }; 359 360 static const unsigned int byt_score_ssp0_pins[] = { 8, 9, 10, 11 }; 361 static const unsigned int byt_score_ssp1_pins[] = { 12, 13, 14, 15 }; 362 static const unsigned int byt_score_ssp2_pins[] = { 62, 63, 64, 65 }; 363 static const struct byt_simple_func_mux byt_score_ssp_mux[] = { 364 SIMPLE_FUNC("ssp", 1), 365 }; 366 367 static const unsigned int byt_score_sdcard_pins[] = { 368 7, 33, 34, 35, 36, 37, 38, 39, 40, 41, 369 }; 370 static const unsigned short byt_score_sdcard_mux_values[] = { 371 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 372 }; 373 static const struct byt_mixed_func_mux byt_score_sdcard_mux[] = { 374 MIXED_FUNC("sdcard", byt_score_sdcard_mux_values), 375 }; 376 377 static const unsigned int byt_score_sdio_pins[] = { 27, 28, 29, 30, 31, 32 }; 378 static const struct byt_simple_func_mux byt_score_sdio_mux[] = { 379 SIMPLE_FUNC("sdio", 1), 380 }; 381 382 static const unsigned int byt_score_emmc_pins[] = { 383 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 384 }; 385 static const struct byt_simple_func_mux byt_score_emmc_mux[] = { 386 SIMPLE_FUNC("emmc", 1), 387 }; 388 389 static const unsigned int byt_score_ilb_lpc_pins[] = { 390 42, 43, 44, 45, 46, 47, 48, 49, 50, 391 }; 392 static const struct byt_simple_func_mux byt_score_lpc_mux[] = { 393 SIMPLE_FUNC("lpc", 1), 394 }; 395 396 static const unsigned int byt_score_sata_pins[] = { 0, 1, 2 }; 397 static const struct byt_simple_func_mux byt_score_sata_mux[] = { 398 SIMPLE_FUNC("sata", 1), 399 }; 400 401 static const unsigned int byt_score_plt_clk0_pins[] = { 96 }; 402 static const unsigned int byt_score_plt_clk1_pins[] = { 97 }; 403 static const unsigned int byt_score_plt_clk2_pins[] = { 98 }; 404 static const unsigned int byt_score_plt_clk4_pins[] = { 99 }; 405 static const unsigned int byt_score_plt_clk5_pins[] = { 100 }; 406 static const unsigned int byt_score_plt_clk3_pins[] = { 101 }; 407 static const struct byt_simple_func_mux byt_score_plt_clk_mux[] = { 408 SIMPLE_FUNC("plt_clk", 1), 409 }; 410 411 static const unsigned int byt_score_smbus_pins[] = { 51, 52, 53 }; 412 static const struct byt_simple_func_mux byt_score_smbus_mux[] = { 413 SIMPLE_FUNC("smbus", 1), 414 }; 415 416 static const struct byt_pingroup byt_score_groups[] = { 417 PIN_GROUP_SIMPLE("uart1_grp", 418 byt_score_uart1_pins, byt_score_uart_mux), 419 PIN_GROUP_SIMPLE("uart2_grp", 420 byt_score_uart2_pins, byt_score_uart_mux), 421 PIN_GROUP_SIMPLE("pwm0_grp", 422 byt_score_pwm0_pins, byt_score_pwm_mux), 423 PIN_GROUP_SIMPLE("pwm1_grp", 424 byt_score_pwm1_pins, byt_score_pwm_mux), 425 PIN_GROUP_SIMPLE("ssp2_grp", 426 byt_score_ssp2_pins, byt_score_pwm_mux), 427 PIN_GROUP_SIMPLE("sio_spi_grp", 428 byt_score_sio_spi_pins, byt_score_spi_mux), 429 PIN_GROUP_SIMPLE("i2c5_grp", 430 byt_score_i2c5_pins, byt_score_i2c_mux), 431 PIN_GROUP_SIMPLE("i2c6_grp", 432 byt_score_i2c6_pins, byt_score_i2c_mux), 433 PIN_GROUP_SIMPLE("i2c4_grp", 434 byt_score_i2c4_pins, byt_score_i2c_mux), 435 PIN_GROUP_SIMPLE("i2c3_grp", 436 byt_score_i2c3_pins, byt_score_i2c_mux), 437 PIN_GROUP_SIMPLE("i2c2_grp", 438 byt_score_i2c2_pins, byt_score_i2c_mux), 439 PIN_GROUP_SIMPLE("i2c1_grp", 440 byt_score_i2c1_pins, byt_score_i2c_mux), 441 PIN_GROUP_SIMPLE("i2c0_grp", 442 byt_score_i2c0_pins, byt_score_i2c_mux), 443 PIN_GROUP_SIMPLE("ssp0_grp", 444 byt_score_ssp0_pins, byt_score_ssp_mux), 445 PIN_GROUP_SIMPLE("ssp1_grp", 446 byt_score_ssp1_pins, byt_score_ssp_mux), 447 PIN_GROUP_MIXED("sdcard_grp", 448 byt_score_sdcard_pins, byt_score_sdcard_mux), 449 PIN_GROUP_SIMPLE("sdio_grp", 450 byt_score_sdio_pins, byt_score_sdio_mux), 451 PIN_GROUP_SIMPLE("emmc_grp", 452 byt_score_emmc_pins, byt_score_emmc_mux), 453 PIN_GROUP_SIMPLE("lpc_grp", 454 byt_score_ilb_lpc_pins, byt_score_lpc_mux), 455 PIN_GROUP_SIMPLE("sata_grp", 456 byt_score_sata_pins, byt_score_sata_mux), 457 PIN_GROUP_SIMPLE("plt_clk0_grp", 458 byt_score_plt_clk0_pins, byt_score_plt_clk_mux), 459 PIN_GROUP_SIMPLE("plt_clk1_grp", 460 byt_score_plt_clk1_pins, byt_score_plt_clk_mux), 461 PIN_GROUP_SIMPLE("plt_clk2_grp", 462 byt_score_plt_clk2_pins, byt_score_plt_clk_mux), 463 PIN_GROUP_SIMPLE("plt_clk3_grp", 464 byt_score_plt_clk3_pins, byt_score_plt_clk_mux), 465 PIN_GROUP_SIMPLE("plt_clk4_grp", 466 byt_score_plt_clk4_pins, byt_score_plt_clk_mux), 467 PIN_GROUP_SIMPLE("plt_clk5_grp", 468 byt_score_plt_clk5_pins, byt_score_plt_clk_mux), 469 PIN_GROUP_SIMPLE("smbus_grp", 470 byt_score_smbus_pins, byt_score_smbus_mux), 471 }; 472 473 static const char * const byt_score_uart_groups[] = { 474 "uart1_grp", "uart2_grp", 475 }; 476 static const char * const byt_score_pwm_groups[] = { 477 "pwm0_grp", "pwm1_grp", 478 }; 479 static const char * const byt_score_ssp_groups[] = { 480 "ssp0_grp", "ssp1_grp", "ssp2_grp", 481 }; 482 static const char * const byt_score_spi_groups[] = { "sio_spi_grp" }; 483 static const char * const byt_score_i2c_groups[] = { 484 "i2c0_grp", "i2c1_grp", "i2c2_grp", "i2c3_grp", "i2c4_grp", "i2c5_grp", 485 "i2c6_grp", 486 }; 487 static const char * const byt_score_sdcard_groups[] = { "sdcard_grp" }; 488 static const char * const byt_score_sdio_groups[] = { "sdio_grp" }; 489 static const char * const byt_score_emmc_groups[] = { "emmc_grp" }; 490 static const char * const byt_score_lpc_groups[] = { "lpc_grp" }; 491 static const char * const byt_score_sata_groups[] = { "sata_grp" }; 492 static const char * const byt_score_plt_clk_groups[] = { 493 "plt_clk0_grp", "plt_clk1_grp", "plt_clk2_grp", "plt_clk3_grp", 494 "plt_clk4_grp", "plt_clk5_grp", 495 }; 496 static const char * const byt_score_smbus_groups[] = { "smbus_grp" }; 497 static const char * const byt_score_gpio_groups[] = { 498 "uart1_grp", "uart2_grp", "pwm0_grp", "pwm1_grp", "ssp0_grp", 499 "ssp1_grp", "ssp2_grp", "sio_spi_grp", "i2c0_grp", "i2c1_grp", 500 "i2c2_grp", "i2c3_grp", "i2c4_grp", "i2c5_grp", "i2c6_grp", 501 "sdcard_grp", "sdio_grp", "emmc_grp", "lpc_grp", "sata_grp", 502 "plt_clk0_grp", "plt_clk1_grp", "plt_clk2_grp", "plt_clk3_grp", 503 "plt_clk4_grp", "plt_clk5_grp", "smbus_grp", 504 505 }; 506 507 static const struct byt_function byt_score_functions[] = { 508 FUNCTION("uart", byt_score_uart_groups), 509 FUNCTION("pwm", byt_score_pwm_groups), 510 FUNCTION("ssp", byt_score_ssp_groups), 511 FUNCTION("spi", byt_score_spi_groups), 512 FUNCTION("i2c", byt_score_i2c_groups), 513 FUNCTION("sdcard", byt_score_sdcard_groups), 514 FUNCTION("sdio", byt_score_sdio_groups), 515 FUNCTION("emmc", byt_score_emmc_groups), 516 FUNCTION("lpc", byt_score_lpc_groups), 517 FUNCTION("sata", byt_score_sata_groups), 518 FUNCTION("plt_clk", byt_score_plt_clk_groups), 519 FUNCTION("smbus", byt_score_smbus_groups), 520 FUNCTION("gpio", byt_score_gpio_groups), 521 }; 522 523 static const struct byt_community byt_score_communities[] = { 524 COMMUNITY(0, BYT_NGPIO_SCORE, byt_score_pins_map), 525 }; 526 527 static const struct byt_pinctrl_soc_data byt_score_soc_data = { 528 .uid = BYT_SCORE_ACPI_UID, 529 .pins = byt_score_pins, 530 .npins = ARRAY_SIZE(byt_score_pins), 531 .groups = byt_score_groups, 532 .ngroups = ARRAY_SIZE(byt_score_groups), 533 .functions = byt_score_functions, 534 .nfunctions = ARRAY_SIZE(byt_score_functions), 535 .communities = byt_score_communities, 536 .ncommunities = ARRAY_SIZE(byt_score_communities), 537 }; 538 539 /* SUS pins, aka GPIOS_<pin_no> or GPIO_S5[<pin_no>] */ 540 static const struct pinctrl_pin_desc byt_sus_pins[] = { 541 PINCTRL_PIN(0, "GPIO_S50"), 542 PINCTRL_PIN(1, "GPIO_S51"), 543 PINCTRL_PIN(2, "GPIO_S52"), 544 PINCTRL_PIN(3, "GPIO_S53"), 545 PINCTRL_PIN(4, "GPIO_S54"), 546 PINCTRL_PIN(5, "GPIO_S55"), 547 PINCTRL_PIN(6, "GPIO_S56"), 548 PINCTRL_PIN(7, "GPIO_S57"), 549 PINCTRL_PIN(8, "GPIO_S58"), 550 PINCTRL_PIN(9, "GPIO_S59"), 551 PINCTRL_PIN(10, "GPIO_S510"), 552 PINCTRL_PIN(11, "PMC_SUSPWRDNACK"), 553 PINCTRL_PIN(12, "PMC_SUSCLK0"), 554 PINCTRL_PIN(13, "GPIO_S513"), 555 PINCTRL_PIN(14, "USB_ULPI_RST"), 556 PINCTRL_PIN(15, "PMC_WAKE_PCIE0#"), 557 PINCTRL_PIN(16, "PMC_PWRBTN"), 558 PINCTRL_PIN(17, "GPIO_S517"), 559 PINCTRL_PIN(18, "PMC_SUS_STAT"), 560 PINCTRL_PIN(19, "USB_OC0"), 561 PINCTRL_PIN(20, "USB_OC1"), 562 PINCTRL_PIN(21, "PCU_SPI_CS1"), 563 PINCTRL_PIN(22, "GPIO_S522"), 564 PINCTRL_PIN(23, "GPIO_S523"), 565 PINCTRL_PIN(24, "GPIO_S524"), 566 PINCTRL_PIN(25, "GPIO_S525"), 567 PINCTRL_PIN(26, "GPIO_S526"), 568 PINCTRL_PIN(27, "GPIO_S527"), 569 PINCTRL_PIN(28, "GPIO_S528"), 570 PINCTRL_PIN(29, "GPIO_S529"), 571 PINCTRL_PIN(30, "GPIO_S530"), 572 PINCTRL_PIN(31, "USB_ULPI_CLK"), 573 PINCTRL_PIN(32, "USB_ULPI_DATA0"), 574 PINCTRL_PIN(33, "USB_ULPI_DATA1"), 575 PINCTRL_PIN(34, "USB_ULPI_DATA2"), 576 PINCTRL_PIN(35, "USB_ULPI_DATA3"), 577 PINCTRL_PIN(36, "USB_ULPI_DATA4"), 578 PINCTRL_PIN(37, "USB_ULPI_DATA5"), 579 PINCTRL_PIN(38, "USB_ULPI_DATA6"), 580 PINCTRL_PIN(39, "USB_ULPI_DATA7"), 581 PINCTRL_PIN(40, "USB_ULPI_DIR"), 582 PINCTRL_PIN(41, "USB_ULPI_NXT"), 583 PINCTRL_PIN(42, "USB_ULPI_STP"), 584 PINCTRL_PIN(43, "USB_ULPI_REFCLK"), 585 }; 586 587 static const unsigned int byt_sus_pins_map[BYT_NGPIO_SUS] = { 588 29, 33, 30, 31, 32, 34, 36, 35, 38, 37, 589 18, 7, 11, 20, 17, 1, 8, 10, 19, 12, 590 0, 2, 23, 39, 28, 27, 22, 21, 24, 25, 591 26, 51, 56, 54, 49, 55, 48, 57, 50, 58, 592 52, 53, 59, 40, 593 }; 594 595 static const unsigned int byt_sus_usb_over_current_pins[] = { 19, 20 }; 596 static const struct byt_simple_func_mux byt_sus_usb_oc_mux[] = { 597 SIMPLE_FUNC("usb", 0), 598 SIMPLE_FUNC("gpio", 1), 599 }; 600 601 static const unsigned int byt_sus_usb_ulpi_pins[] = { 602 14, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 603 }; 604 static const unsigned short byt_sus_usb_ulpi_mode_values[] = { 605 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 606 }; 607 static const unsigned short byt_sus_usb_ulpi_gpio_mode_values[] = { 608 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 609 }; 610 static const struct byt_mixed_func_mux byt_sus_usb_ulpi_mux[] = { 611 MIXED_FUNC("usb", byt_sus_usb_ulpi_mode_values), 612 MIXED_FUNC("gpio", byt_sus_usb_ulpi_gpio_mode_values), 613 }; 614 615 static const unsigned int byt_sus_pcu_spi_pins[] = { 21 }; 616 static const struct byt_simple_func_mux byt_sus_pcu_spi_mux[] = { 617 SIMPLE_FUNC("spi", 0), 618 SIMPLE_FUNC("gpio", 1), 619 }; 620 621 static const struct byt_pingroup byt_sus_groups[] = { 622 PIN_GROUP_SIMPLE("usb_oc_grp", 623 byt_sus_usb_over_current_pins, byt_sus_usb_oc_mux), 624 PIN_GROUP_MIXED("usb_ulpi_grp", 625 byt_sus_usb_ulpi_pins, byt_sus_usb_ulpi_mux), 626 PIN_GROUP_SIMPLE("pcu_spi_grp", 627 byt_sus_pcu_spi_pins, byt_sus_pcu_spi_mux), 628 }; 629 630 static const char * const byt_sus_usb_groups[] = { 631 "usb_oc_grp", "usb_ulpi_grp", 632 }; 633 static const char * const byt_sus_spi_groups[] = { "pcu_spi_grp" }; 634 static const char * const byt_sus_gpio_groups[] = { 635 "usb_oc_grp", "usb_ulpi_grp", "pcu_spi_grp", 636 }; 637 638 static const struct byt_function byt_sus_functions[] = { 639 FUNCTION("usb", byt_sus_usb_groups), 640 FUNCTION("spi", byt_sus_spi_groups), 641 FUNCTION("gpio", byt_sus_gpio_groups), 642 }; 643 644 static const struct byt_community byt_sus_communities[] = { 645 COMMUNITY(0, BYT_NGPIO_SUS, byt_sus_pins_map), 646 }; 647 648 static const struct byt_pinctrl_soc_data byt_sus_soc_data = { 649 .uid = BYT_SUS_ACPI_UID, 650 .pins = byt_sus_pins, 651 .npins = ARRAY_SIZE(byt_sus_pins), 652 .groups = byt_sus_groups, 653 .ngroups = ARRAY_SIZE(byt_sus_groups), 654 .functions = byt_sus_functions, 655 .nfunctions = ARRAY_SIZE(byt_sus_functions), 656 .communities = byt_sus_communities, 657 .ncommunities = ARRAY_SIZE(byt_sus_communities), 658 }; 659 660 static const struct pinctrl_pin_desc byt_ncore_pins[] = { 661 PINCTRL_PIN(0, "GPIO_NCORE0"), 662 PINCTRL_PIN(1, "GPIO_NCORE1"), 663 PINCTRL_PIN(2, "GPIO_NCORE2"), 664 PINCTRL_PIN(3, "GPIO_NCORE3"), 665 PINCTRL_PIN(4, "GPIO_NCORE4"), 666 PINCTRL_PIN(5, "GPIO_NCORE5"), 667 PINCTRL_PIN(6, "GPIO_NCORE6"), 668 PINCTRL_PIN(7, "GPIO_NCORE7"), 669 PINCTRL_PIN(8, "GPIO_NCORE8"), 670 PINCTRL_PIN(9, "GPIO_NCORE9"), 671 PINCTRL_PIN(10, "GPIO_NCORE10"), 672 PINCTRL_PIN(11, "GPIO_NCORE11"), 673 PINCTRL_PIN(12, "GPIO_NCORE12"), 674 PINCTRL_PIN(13, "GPIO_NCORE13"), 675 PINCTRL_PIN(14, "GPIO_NCORE14"), 676 PINCTRL_PIN(15, "GPIO_NCORE15"), 677 PINCTRL_PIN(16, "GPIO_NCORE16"), 678 PINCTRL_PIN(17, "GPIO_NCORE17"), 679 PINCTRL_PIN(18, "GPIO_NCORE18"), 680 PINCTRL_PIN(19, "GPIO_NCORE19"), 681 PINCTRL_PIN(20, "GPIO_NCORE20"), 682 PINCTRL_PIN(21, "GPIO_NCORE21"), 683 PINCTRL_PIN(22, "GPIO_NCORE22"), 684 PINCTRL_PIN(23, "GPIO_NCORE23"), 685 PINCTRL_PIN(24, "GPIO_NCORE24"), 686 PINCTRL_PIN(25, "GPIO_NCORE25"), 687 PINCTRL_PIN(26, "GPIO_NCORE26"), 688 PINCTRL_PIN(27, "GPIO_NCORE27"), 689 }; 690 691 static unsigned const byt_ncore_pins_map[BYT_NGPIO_NCORE] = { 692 19, 18, 17, 20, 21, 22, 24, 25, 23, 16, 693 14, 15, 12, 26, 27, 1, 4, 8, 11, 0, 694 3, 6, 10, 13, 2, 5, 9, 7, 695 }; 696 697 static const struct byt_community byt_ncore_communities[] = { 698 COMMUNITY(0, BYT_NGPIO_NCORE, byt_ncore_pins_map), 699 }; 700 701 static const struct byt_pinctrl_soc_data byt_ncore_soc_data = { 702 .uid = BYT_NCORE_ACPI_UID, 703 .pins = byt_ncore_pins, 704 .npins = ARRAY_SIZE(byt_ncore_pins), 705 .communities = byt_ncore_communities, 706 .ncommunities = ARRAY_SIZE(byt_ncore_communities), 707 }; 708 709 static const struct byt_pinctrl_soc_data *byt_soc_data[] = { 710 &byt_score_soc_data, 711 &byt_sus_soc_data, 712 &byt_ncore_soc_data, 713 NULL, 714 }; 715 716 static struct byt_community *byt_get_community(struct byt_gpio *vg, 717 unsigned int pin) 718 { 719 struct byt_community *comm; 720 int i; 721 722 for (i = 0; i < vg->soc_data->ncommunities; i++) { 723 comm = vg->communities_copy + i; 724 if (pin < comm->pin_base + comm->npins && pin >= comm->pin_base) 725 return comm; 726 } 727 728 return NULL; 729 } 730 731 static void __iomem *byt_gpio_reg(struct byt_gpio *vg, unsigned int offset, 732 int reg) 733 { 734 struct byt_community *comm = byt_get_community(vg, offset); 735 u32 reg_offset = 0; 736 737 if (!comm) 738 return NULL; 739 740 offset -= comm->pin_base; 741 if (reg == BYT_INT_STAT_REG) 742 reg_offset = (offset / 32) * 4; 743 else 744 reg_offset = comm->pad_map[offset] * 16; 745 746 return comm->reg_base + reg_offset + reg; 747 } 748 749 static int byt_get_groups_count(struct pinctrl_dev *pctldev) 750 { 751 struct byt_gpio *vg = pinctrl_dev_get_drvdata(pctldev); 752 753 return vg->soc_data->ngroups; 754 } 755 756 static const char *byt_get_group_name(struct pinctrl_dev *pctldev, 757 unsigned int selector) 758 { 759 struct byt_gpio *vg = pinctrl_dev_get_drvdata(pctldev); 760 761 return vg->soc_data->groups[selector].name; 762 } 763 764 static int byt_get_group_pins(struct pinctrl_dev *pctldev, 765 unsigned int selector, 766 const unsigned int **pins, 767 unsigned int *num_pins) 768 { 769 struct byt_gpio *vg = pinctrl_dev_get_drvdata(pctldev); 770 771 *pins = vg->soc_data->groups[selector].pins; 772 *num_pins = vg->soc_data->groups[selector].npins; 773 774 return 0; 775 } 776 777 static const struct pinctrl_ops byt_pinctrl_ops = { 778 .get_groups_count = byt_get_groups_count, 779 .get_group_name = byt_get_group_name, 780 .get_group_pins = byt_get_group_pins, 781 }; 782 783 static int byt_get_functions_count(struct pinctrl_dev *pctldev) 784 { 785 struct byt_gpio *vg = pinctrl_dev_get_drvdata(pctldev); 786 787 return vg->soc_data->nfunctions; 788 } 789 790 static const char *byt_get_function_name(struct pinctrl_dev *pctldev, 791 unsigned int selector) 792 { 793 struct byt_gpio *vg = pinctrl_dev_get_drvdata(pctldev); 794 795 return vg->soc_data->functions[selector].name; 796 } 797 798 static int byt_get_function_groups(struct pinctrl_dev *pctldev, 799 unsigned int selector, 800 const char * const **groups, 801 unsigned int *num_groups) 802 { 803 struct byt_gpio *vg = pinctrl_dev_get_drvdata(pctldev); 804 805 *groups = vg->soc_data->functions[selector].groups; 806 *num_groups = vg->soc_data->functions[selector].ngroups; 807 808 return 0; 809 } 810 811 static int byt_get_group_simple_mux(const struct byt_pingroup group, 812 const char *func_name, 813 unsigned short *func) 814 { 815 int i; 816 817 for (i = 0; i < group.nfuncs; i++) { 818 if (!strcmp(group.simple_funcs[i].name, func_name)) { 819 *func = group.simple_funcs[i].func; 820 return 0; 821 } 822 } 823 824 return 1; 825 } 826 827 static int byt_get_group_mixed_mux(const struct byt_pingroup group, 828 const char *func_name, 829 const unsigned short **func) 830 { 831 int i; 832 833 for (i = 0; i < group.nfuncs; i++) { 834 if (!strcmp(group.mixed_funcs[i].name, func_name)) { 835 *func = group.mixed_funcs[i].func_values; 836 return 0; 837 } 838 } 839 840 return 1; 841 } 842 843 static void byt_set_group_simple_mux(struct byt_gpio *vg, 844 const struct byt_pingroup group, 845 unsigned short func) 846 { 847 unsigned long flags; 848 int i; 849 850 raw_spin_lock_irqsave(&vg->lock, flags); 851 852 for (i = 0; i < group.npins; i++) { 853 void __iomem *padcfg0; 854 u32 value; 855 856 padcfg0 = byt_gpio_reg(vg, group.pins[i], BYT_CONF0_REG); 857 if (!padcfg0) { 858 dev_warn(&vg->pdev->dev, 859 "Group %s, pin %i not muxed (no padcfg0)\n", 860 group.name, i); 861 continue; 862 } 863 864 value = readl(padcfg0); 865 value &= ~BYT_PIN_MUX; 866 value |= func; 867 writel(value, padcfg0); 868 } 869 870 raw_spin_unlock_irqrestore(&vg->lock, flags); 871 } 872 873 static void byt_set_group_mixed_mux(struct byt_gpio *vg, 874 const struct byt_pingroup group, 875 const unsigned short *func) 876 { 877 unsigned long flags; 878 int i; 879 880 raw_spin_lock_irqsave(&vg->lock, flags); 881 882 for (i = 0; i < group.npins; i++) { 883 void __iomem *padcfg0; 884 u32 value; 885 886 padcfg0 = byt_gpio_reg(vg, group.pins[i], BYT_CONF0_REG); 887 if (!padcfg0) { 888 dev_warn(&vg->pdev->dev, 889 "Group %s, pin %i not muxed (no padcfg0)\n", 890 group.name, i); 891 continue; 892 } 893 894 value = readl(padcfg0); 895 value &= ~BYT_PIN_MUX; 896 value |= func[i]; 897 writel(value, padcfg0); 898 } 899 900 raw_spin_unlock_irqrestore(&vg->lock, flags); 901 } 902 903 static int byt_set_mux(struct pinctrl_dev *pctldev, unsigned int func_selector, 904 unsigned int group_selector) 905 { 906 struct byt_gpio *vg = pinctrl_dev_get_drvdata(pctldev); 907 const struct byt_function func = vg->soc_data->functions[func_selector]; 908 const struct byt_pingroup group = vg->soc_data->groups[group_selector]; 909 const unsigned short *mixed_func; 910 unsigned short simple_func; 911 int ret = 1; 912 913 if (group.has_simple_funcs) 914 ret = byt_get_group_simple_mux(group, func.name, &simple_func); 915 else 916 ret = byt_get_group_mixed_mux(group, func.name, &mixed_func); 917 918 if (ret) 919 byt_set_group_simple_mux(vg, group, BYT_DEFAULT_GPIO_MUX); 920 else if (group.has_simple_funcs) 921 byt_set_group_simple_mux(vg, group, simple_func); 922 else 923 byt_set_group_mixed_mux(vg, group, mixed_func); 924 925 return 0; 926 } 927 928 static u32 byt_get_gpio_mux(struct byt_gpio *vg, unsigned offset) 929 { 930 /* SCORE pin 92-93 */ 931 if (!strcmp(vg->soc_data->uid, BYT_SCORE_ACPI_UID) && 932 offset >= 92 && offset <= 93) 933 return 1; 934 935 /* SUS pin 11-21 */ 936 if (!strcmp(vg->soc_data->uid, BYT_SUS_ACPI_UID) && 937 offset >= 11 && offset <= 21) 938 return 1; 939 940 return 0; 941 } 942 943 static void byt_gpio_clear_triggering(struct byt_gpio *vg, unsigned int offset) 944 { 945 void __iomem *reg = byt_gpio_reg(vg, offset, BYT_CONF0_REG); 946 unsigned long flags; 947 u32 value; 948 949 raw_spin_lock_irqsave(&vg->lock, flags); 950 value = readl(reg); 951 value &= ~(BYT_TRIG_POS | BYT_TRIG_NEG | BYT_TRIG_LVL); 952 writel(value, reg); 953 raw_spin_unlock_irqrestore(&vg->lock, flags); 954 } 955 956 static int byt_gpio_request_enable(struct pinctrl_dev *pctl_dev, 957 struct pinctrl_gpio_range *range, 958 unsigned int offset) 959 { 960 struct byt_gpio *vg = pinctrl_dev_get_drvdata(pctl_dev); 961 void __iomem *reg = byt_gpio_reg(vg, offset, BYT_CONF0_REG); 962 u32 value, gpio_mux; 963 unsigned long flags; 964 965 raw_spin_lock_irqsave(&vg->lock, flags); 966 967 /* 968 * In most cases, func pin mux 000 means GPIO function. 969 * But, some pins may have func pin mux 001 represents 970 * GPIO function. 971 * 972 * Because there are devices out there where some pins were not 973 * configured correctly we allow changing the mux value from 974 * request (but print out warning about that). 975 */ 976 value = readl(reg) & BYT_PIN_MUX; 977 gpio_mux = byt_get_gpio_mux(vg, offset); 978 if (WARN_ON(gpio_mux != value)) { 979 value = readl(reg) & ~BYT_PIN_MUX; 980 value |= gpio_mux; 981 writel(value, reg); 982 983 dev_warn(&vg->pdev->dev, 984 "pin %u forcibly re-configured as GPIO\n", offset); 985 } 986 987 raw_spin_unlock_irqrestore(&vg->lock, flags); 988 989 pm_runtime_get(&vg->pdev->dev); 990 991 return 0; 992 } 993 994 static void byt_gpio_disable_free(struct pinctrl_dev *pctl_dev, 995 struct pinctrl_gpio_range *range, 996 unsigned int offset) 997 { 998 struct byt_gpio *vg = pinctrl_dev_get_drvdata(pctl_dev); 999 1000 byt_gpio_clear_triggering(vg, offset); 1001 pm_runtime_put(&vg->pdev->dev); 1002 } 1003 1004 static int byt_gpio_set_direction(struct pinctrl_dev *pctl_dev, 1005 struct pinctrl_gpio_range *range, 1006 unsigned int offset, 1007 bool input) 1008 { 1009 struct byt_gpio *vg = pinctrl_dev_get_drvdata(pctl_dev); 1010 void __iomem *val_reg = byt_gpio_reg(vg, offset, BYT_VAL_REG); 1011 void __iomem *conf_reg = byt_gpio_reg(vg, offset, BYT_CONF0_REG); 1012 unsigned long flags; 1013 u32 value; 1014 1015 raw_spin_lock_irqsave(&vg->lock, flags); 1016 1017 value = readl(val_reg); 1018 value &= ~BYT_DIR_MASK; 1019 if (input) 1020 value |= BYT_OUTPUT_EN; 1021 else 1022 /* 1023 * Before making any direction modifications, do a check if gpio 1024 * is set for direct IRQ. On baytrail, setting GPIO to output 1025 * does not make sense, so let's at least warn the caller before 1026 * they shoot themselves in the foot. 1027 */ 1028 WARN(readl(conf_reg) & BYT_DIRECT_IRQ_EN, 1029 "Potential Error: Setting GPIO with direct_irq_en to output"); 1030 writel(value, val_reg); 1031 1032 raw_spin_unlock_irqrestore(&vg->lock, flags); 1033 1034 return 0; 1035 } 1036 1037 static const struct pinmux_ops byt_pinmux_ops = { 1038 .get_functions_count = byt_get_functions_count, 1039 .get_function_name = byt_get_function_name, 1040 .get_function_groups = byt_get_function_groups, 1041 .set_mux = byt_set_mux, 1042 .gpio_request_enable = byt_gpio_request_enable, 1043 .gpio_disable_free = byt_gpio_disable_free, 1044 .gpio_set_direction = byt_gpio_set_direction, 1045 }; 1046 1047 static void byt_get_pull_strength(u32 reg, u16 *strength) 1048 { 1049 switch (reg & BYT_PULL_STR_MASK) { 1050 case BYT_PULL_STR_2K: 1051 *strength = 2000; 1052 break; 1053 case BYT_PULL_STR_10K: 1054 *strength = 10000; 1055 break; 1056 case BYT_PULL_STR_20K: 1057 *strength = 20000; 1058 break; 1059 case BYT_PULL_STR_40K: 1060 *strength = 40000; 1061 break; 1062 } 1063 } 1064 1065 static int byt_set_pull_strength(u32 *reg, u16 strength) 1066 { 1067 *reg &= ~BYT_PULL_STR_MASK; 1068 1069 switch (strength) { 1070 case 2000: 1071 *reg |= BYT_PULL_STR_2K; 1072 break; 1073 case 10000: 1074 *reg |= BYT_PULL_STR_10K; 1075 break; 1076 case 20000: 1077 *reg |= BYT_PULL_STR_20K; 1078 break; 1079 case 40000: 1080 *reg |= BYT_PULL_STR_40K; 1081 break; 1082 default: 1083 return -EINVAL; 1084 } 1085 1086 return 0; 1087 } 1088 1089 static int byt_pin_config_get(struct pinctrl_dev *pctl_dev, unsigned int offset, 1090 unsigned long *config) 1091 { 1092 struct byt_gpio *vg = pinctrl_dev_get_drvdata(pctl_dev); 1093 enum pin_config_param param = pinconf_to_config_param(*config); 1094 void __iomem *conf_reg = byt_gpio_reg(vg, offset, BYT_CONF0_REG); 1095 void __iomem *val_reg = byt_gpio_reg(vg, offset, BYT_VAL_REG); 1096 unsigned long flags; 1097 u32 conf, pull, val, debounce; 1098 u16 arg = 0; 1099 1100 raw_spin_lock_irqsave(&vg->lock, flags); 1101 conf = readl(conf_reg); 1102 pull = conf & BYT_PULL_ASSIGN_MASK; 1103 val = readl(val_reg); 1104 raw_spin_unlock_irqrestore(&vg->lock, flags); 1105 1106 switch (param) { 1107 case PIN_CONFIG_BIAS_DISABLE: 1108 if (pull) 1109 return -EINVAL; 1110 break; 1111 case PIN_CONFIG_BIAS_PULL_DOWN: 1112 /* Pull assignment is only applicable in input mode */ 1113 if ((val & BYT_INPUT_EN) || pull != BYT_PULL_ASSIGN_DOWN) 1114 return -EINVAL; 1115 1116 byt_get_pull_strength(conf, &arg); 1117 1118 break; 1119 case PIN_CONFIG_BIAS_PULL_UP: 1120 /* Pull assignment is only applicable in input mode */ 1121 if ((val & BYT_INPUT_EN) || pull != BYT_PULL_ASSIGN_UP) 1122 return -EINVAL; 1123 1124 byt_get_pull_strength(conf, &arg); 1125 1126 break; 1127 case PIN_CONFIG_INPUT_DEBOUNCE: 1128 if (!(conf & BYT_DEBOUNCE_EN)) 1129 return -EINVAL; 1130 1131 raw_spin_lock_irqsave(&vg->lock, flags); 1132 debounce = readl(byt_gpio_reg(vg, offset, BYT_DEBOUNCE_REG)); 1133 raw_spin_unlock_irqrestore(&vg->lock, flags); 1134 1135 switch (debounce & BYT_DEBOUNCE_PULSE_MASK) { 1136 case BYT_DEBOUNCE_PULSE_375US: 1137 arg = 375; 1138 break; 1139 case BYT_DEBOUNCE_PULSE_750US: 1140 arg = 750; 1141 break; 1142 case BYT_DEBOUNCE_PULSE_1500US: 1143 arg = 1500; 1144 break; 1145 case BYT_DEBOUNCE_PULSE_3MS: 1146 arg = 3000; 1147 break; 1148 case BYT_DEBOUNCE_PULSE_6MS: 1149 arg = 6000; 1150 break; 1151 case BYT_DEBOUNCE_PULSE_12MS: 1152 arg = 12000; 1153 break; 1154 case BYT_DEBOUNCE_PULSE_24MS: 1155 arg = 24000; 1156 break; 1157 default: 1158 return -EINVAL; 1159 } 1160 1161 break; 1162 default: 1163 return -ENOTSUPP; 1164 } 1165 1166 *config = pinconf_to_config_packed(param, arg); 1167 1168 return 0; 1169 } 1170 1171 static int byt_pin_config_set(struct pinctrl_dev *pctl_dev, 1172 unsigned int offset, 1173 unsigned long *configs, 1174 unsigned int num_configs) 1175 { 1176 struct byt_gpio *vg = pinctrl_dev_get_drvdata(pctl_dev); 1177 unsigned int param, arg; 1178 void __iomem *conf_reg = byt_gpio_reg(vg, offset, BYT_CONF0_REG); 1179 void __iomem *val_reg = byt_gpio_reg(vg, offset, BYT_VAL_REG); 1180 unsigned long flags; 1181 u32 conf, val, debounce; 1182 int i, ret = 0; 1183 1184 raw_spin_lock_irqsave(&vg->lock, flags); 1185 1186 conf = readl(conf_reg); 1187 val = readl(val_reg); 1188 1189 for (i = 0; i < num_configs; i++) { 1190 param = pinconf_to_config_param(configs[i]); 1191 arg = pinconf_to_config_argument(configs[i]); 1192 1193 switch (param) { 1194 case PIN_CONFIG_BIAS_DISABLE: 1195 conf &= ~BYT_PULL_ASSIGN_MASK; 1196 break; 1197 case PIN_CONFIG_BIAS_PULL_DOWN: 1198 /* Set default strength value in case none is given */ 1199 if (arg == 1) 1200 arg = 2000; 1201 1202 /* 1203 * Pull assignment is only applicable in input mode. If 1204 * chip is not in input mode, set it and warn about it. 1205 */ 1206 if (val & BYT_INPUT_EN) { 1207 val &= ~BYT_INPUT_EN; 1208 writel(val, val_reg); 1209 dev_warn(&vg->pdev->dev, 1210 "pin %u forcibly set to input mode\n", 1211 offset); 1212 } 1213 1214 conf &= ~BYT_PULL_ASSIGN_MASK; 1215 conf |= BYT_PULL_ASSIGN_DOWN; 1216 ret = byt_set_pull_strength(&conf, arg); 1217 1218 break; 1219 case PIN_CONFIG_BIAS_PULL_UP: 1220 /* Set default strength value in case none is given */ 1221 if (arg == 1) 1222 arg = 2000; 1223 1224 /* 1225 * Pull assignment is only applicable in input mode. If 1226 * chip is not in input mode, set it and warn about it. 1227 */ 1228 if (val & BYT_INPUT_EN) { 1229 val &= ~BYT_INPUT_EN; 1230 writel(val, val_reg); 1231 dev_warn(&vg->pdev->dev, 1232 "pin %u forcibly set to input mode\n", 1233 offset); 1234 } 1235 1236 conf &= ~BYT_PULL_ASSIGN_MASK; 1237 conf |= BYT_PULL_ASSIGN_UP; 1238 ret = byt_set_pull_strength(&conf, arg); 1239 1240 break; 1241 case PIN_CONFIG_INPUT_DEBOUNCE: 1242 debounce = readl(byt_gpio_reg(vg, offset, 1243 BYT_DEBOUNCE_REG)); 1244 conf &= ~BYT_DEBOUNCE_PULSE_MASK; 1245 1246 switch (arg) { 1247 case 375: 1248 conf |= BYT_DEBOUNCE_PULSE_375US; 1249 break; 1250 case 750: 1251 conf |= BYT_DEBOUNCE_PULSE_750US; 1252 break; 1253 case 1500: 1254 conf |= BYT_DEBOUNCE_PULSE_1500US; 1255 break; 1256 case 3000: 1257 conf |= BYT_DEBOUNCE_PULSE_3MS; 1258 break; 1259 case 6000: 1260 conf |= BYT_DEBOUNCE_PULSE_6MS; 1261 break; 1262 case 12000: 1263 conf |= BYT_DEBOUNCE_PULSE_12MS; 1264 break; 1265 case 24000: 1266 conf |= BYT_DEBOUNCE_PULSE_24MS; 1267 break; 1268 default: 1269 ret = -EINVAL; 1270 } 1271 1272 break; 1273 default: 1274 ret = -ENOTSUPP; 1275 } 1276 1277 if (ret) 1278 break; 1279 } 1280 1281 if (!ret) 1282 writel(conf, conf_reg); 1283 1284 raw_spin_unlock_irqrestore(&vg->lock, flags); 1285 1286 return ret; 1287 } 1288 1289 static const struct pinconf_ops byt_pinconf_ops = { 1290 .is_generic = true, 1291 .pin_config_get = byt_pin_config_get, 1292 .pin_config_set = byt_pin_config_set, 1293 }; 1294 1295 static const struct pinctrl_desc byt_pinctrl_desc = { 1296 .pctlops = &byt_pinctrl_ops, 1297 .pmxops = &byt_pinmux_ops, 1298 .confops = &byt_pinconf_ops, 1299 .owner = THIS_MODULE, 1300 }; 1301 1302 static int byt_gpio_get(struct gpio_chip *chip, unsigned offset) 1303 { 1304 struct byt_gpio *vg = gpiochip_get_data(chip); 1305 void __iomem *reg = byt_gpio_reg(vg, offset, BYT_VAL_REG); 1306 unsigned long flags; 1307 u32 val; 1308 1309 raw_spin_lock_irqsave(&vg->lock, flags); 1310 val = readl(reg); 1311 raw_spin_unlock_irqrestore(&vg->lock, flags); 1312 1313 return !!(val & BYT_LEVEL); 1314 } 1315 1316 static void byt_gpio_set(struct gpio_chip *chip, unsigned offset, int value) 1317 { 1318 struct byt_gpio *vg = gpiochip_get_data(chip); 1319 void __iomem *reg = byt_gpio_reg(vg, offset, BYT_VAL_REG); 1320 unsigned long flags; 1321 u32 old_val; 1322 1323 if (!reg) 1324 return; 1325 1326 raw_spin_lock_irqsave(&vg->lock, flags); 1327 old_val = readl(reg); 1328 if (value) 1329 writel(old_val | BYT_LEVEL, reg); 1330 else 1331 writel(old_val & ~BYT_LEVEL, reg); 1332 raw_spin_unlock_irqrestore(&vg->lock, flags); 1333 } 1334 1335 static int byt_gpio_get_direction(struct gpio_chip *chip, unsigned int offset) 1336 { 1337 struct byt_gpio *vg = gpiochip_get_data(chip); 1338 void __iomem *reg = byt_gpio_reg(vg, offset, BYT_VAL_REG); 1339 unsigned long flags; 1340 u32 value; 1341 1342 if (!reg) 1343 return -EINVAL; 1344 1345 raw_spin_lock_irqsave(&vg->lock, flags); 1346 value = readl(reg); 1347 raw_spin_unlock_irqrestore(&vg->lock, flags); 1348 1349 if (!(value & BYT_OUTPUT_EN)) 1350 return GPIOF_DIR_OUT; 1351 if (!(value & BYT_INPUT_EN)) 1352 return GPIOF_DIR_IN; 1353 1354 return -EINVAL; 1355 } 1356 1357 static int byt_gpio_direction_input(struct gpio_chip *chip, unsigned int offset) 1358 { 1359 return pinctrl_gpio_direction_input(chip->base + offset); 1360 } 1361 1362 static int byt_gpio_direction_output(struct gpio_chip *chip, 1363 unsigned int offset, int value) 1364 { 1365 int ret = pinctrl_gpio_direction_output(chip->base + offset); 1366 1367 if (ret) 1368 return ret; 1369 1370 byt_gpio_set(chip, offset, value); 1371 1372 return 0; 1373 } 1374 1375 static void byt_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip) 1376 { 1377 struct byt_gpio *vg = gpiochip_get_data(chip); 1378 int i; 1379 u32 conf0, val; 1380 1381 for (i = 0; i < vg->soc_data->npins; i++) { 1382 const struct byt_community *comm; 1383 const char *pull_str = NULL; 1384 const char *pull = NULL; 1385 void __iomem *reg; 1386 unsigned long flags; 1387 const char *label; 1388 unsigned int pin; 1389 1390 raw_spin_lock_irqsave(&vg->lock, flags); 1391 pin = vg->soc_data->pins[i].number; 1392 reg = byt_gpio_reg(vg, pin, BYT_CONF0_REG); 1393 if (!reg) { 1394 seq_printf(s, 1395 "Could not retrieve pin %i conf0 reg\n", 1396 pin); 1397 raw_spin_unlock_irqrestore(&vg->lock, flags); 1398 continue; 1399 } 1400 conf0 = readl(reg); 1401 1402 reg = byt_gpio_reg(vg, pin, BYT_VAL_REG); 1403 if (!reg) { 1404 seq_printf(s, 1405 "Could not retrieve pin %i val reg\n", pin); 1406 raw_spin_unlock_irqrestore(&vg->lock, flags); 1407 continue; 1408 } 1409 val = readl(reg); 1410 raw_spin_unlock_irqrestore(&vg->lock, flags); 1411 1412 comm = byt_get_community(vg, pin); 1413 if (!comm) { 1414 seq_printf(s, 1415 "Could not get community for pin %i\n", pin); 1416 continue; 1417 } 1418 label = gpiochip_is_requested(chip, i); 1419 if (!label) 1420 label = "Unrequested"; 1421 1422 switch (conf0 & BYT_PULL_ASSIGN_MASK) { 1423 case BYT_PULL_ASSIGN_UP: 1424 pull = "up"; 1425 break; 1426 case BYT_PULL_ASSIGN_DOWN: 1427 pull = "down"; 1428 break; 1429 } 1430 1431 switch (conf0 & BYT_PULL_STR_MASK) { 1432 case BYT_PULL_STR_2K: 1433 pull_str = "2k"; 1434 break; 1435 case BYT_PULL_STR_10K: 1436 pull_str = "10k"; 1437 break; 1438 case BYT_PULL_STR_20K: 1439 pull_str = "20k"; 1440 break; 1441 case BYT_PULL_STR_40K: 1442 pull_str = "40k"; 1443 break; 1444 } 1445 1446 seq_printf(s, 1447 " gpio-%-3d (%-20.20s) %s %s %s pad-%-3d offset:0x%03x mux:%d %s%s%s", 1448 pin, 1449 label, 1450 val & BYT_INPUT_EN ? " " : "in", 1451 val & BYT_OUTPUT_EN ? " " : "out", 1452 val & BYT_LEVEL ? "hi" : "lo", 1453 comm->pad_map[i], comm->pad_map[i] * 32, 1454 conf0 & 0x7, 1455 conf0 & BYT_TRIG_NEG ? " fall" : " ", 1456 conf0 & BYT_TRIG_POS ? " rise" : " ", 1457 conf0 & BYT_TRIG_LVL ? " level" : " "); 1458 1459 if (pull && pull_str) 1460 seq_printf(s, " %-4s %-3s", pull, pull_str); 1461 else 1462 seq_puts(s, " "); 1463 1464 if (conf0 & BYT_IODEN) 1465 seq_puts(s, " open-drain"); 1466 1467 seq_puts(s, "\n"); 1468 } 1469 } 1470 1471 static const struct gpio_chip byt_gpio_chip = { 1472 .owner = THIS_MODULE, 1473 .request = gpiochip_generic_request, 1474 .free = gpiochip_generic_free, 1475 .get_direction = byt_gpio_get_direction, 1476 .direction_input = byt_gpio_direction_input, 1477 .direction_output = byt_gpio_direction_output, 1478 .get = byt_gpio_get, 1479 .set = byt_gpio_set, 1480 .dbg_show = byt_gpio_dbg_show, 1481 }; 1482 1483 static void byt_irq_ack(struct irq_data *d) 1484 { 1485 struct gpio_chip *gc = irq_data_get_irq_chip_data(d); 1486 struct byt_gpio *vg = gpiochip_get_data(gc); 1487 unsigned offset = irqd_to_hwirq(d); 1488 void __iomem *reg; 1489 1490 reg = byt_gpio_reg(vg, offset, BYT_INT_STAT_REG); 1491 if (!reg) 1492 return; 1493 1494 raw_spin_lock(&vg->lock); 1495 writel(BIT(offset % 32), reg); 1496 raw_spin_unlock(&vg->lock); 1497 } 1498 1499 static void byt_irq_mask(struct irq_data *d) 1500 { 1501 struct gpio_chip *gc = irq_data_get_irq_chip_data(d); 1502 struct byt_gpio *vg = gpiochip_get_data(gc); 1503 1504 byt_gpio_clear_triggering(vg, irqd_to_hwirq(d)); 1505 } 1506 1507 static void byt_irq_unmask(struct irq_data *d) 1508 { 1509 struct gpio_chip *gc = irq_data_get_irq_chip_data(d); 1510 struct byt_gpio *vg = gpiochip_get_data(gc); 1511 unsigned offset = irqd_to_hwirq(d); 1512 unsigned long flags; 1513 void __iomem *reg; 1514 u32 value; 1515 1516 reg = byt_gpio_reg(vg, offset, BYT_CONF0_REG); 1517 if (!reg) 1518 return; 1519 1520 raw_spin_lock_irqsave(&vg->lock, flags); 1521 value = readl(reg); 1522 1523 switch (irqd_get_trigger_type(d)) { 1524 case IRQ_TYPE_LEVEL_HIGH: 1525 value |= BYT_TRIG_LVL; 1526 case IRQ_TYPE_EDGE_RISING: 1527 value |= BYT_TRIG_POS; 1528 break; 1529 case IRQ_TYPE_LEVEL_LOW: 1530 value |= BYT_TRIG_LVL; 1531 case IRQ_TYPE_EDGE_FALLING: 1532 value |= BYT_TRIG_NEG; 1533 break; 1534 case IRQ_TYPE_EDGE_BOTH: 1535 value |= (BYT_TRIG_NEG | BYT_TRIG_POS); 1536 break; 1537 } 1538 1539 writel(value, reg); 1540 1541 raw_spin_unlock_irqrestore(&vg->lock, flags); 1542 } 1543 1544 static int byt_irq_type(struct irq_data *d, unsigned int type) 1545 { 1546 struct byt_gpio *vg = gpiochip_get_data(irq_data_get_irq_chip_data(d)); 1547 u32 offset = irqd_to_hwirq(d); 1548 u32 value; 1549 unsigned long flags; 1550 void __iomem *reg = byt_gpio_reg(vg, offset, BYT_CONF0_REG); 1551 1552 if (!reg || offset >= vg->chip.ngpio) 1553 return -EINVAL; 1554 1555 raw_spin_lock_irqsave(&vg->lock, flags); 1556 value = readl(reg); 1557 1558 WARN(value & BYT_DIRECT_IRQ_EN, 1559 "Bad pad config for io mode, force direct_irq_en bit clearing"); 1560 1561 /* For level trigges the BYT_TRIG_POS and BYT_TRIG_NEG bits 1562 * are used to indicate high and low level triggering 1563 */ 1564 value &= ~(BYT_DIRECT_IRQ_EN | BYT_TRIG_POS | BYT_TRIG_NEG | 1565 BYT_TRIG_LVL); 1566 1567 writel(value, reg); 1568 1569 if (type & IRQ_TYPE_EDGE_BOTH) 1570 irq_set_handler_locked(d, handle_edge_irq); 1571 else if (type & IRQ_TYPE_LEVEL_MASK) 1572 irq_set_handler_locked(d, handle_level_irq); 1573 1574 raw_spin_unlock_irqrestore(&vg->lock, flags); 1575 1576 return 0; 1577 } 1578 1579 static struct irq_chip byt_irqchip = { 1580 .name = "BYT-GPIO", 1581 .irq_ack = byt_irq_ack, 1582 .irq_mask = byt_irq_mask, 1583 .irq_unmask = byt_irq_unmask, 1584 .irq_set_type = byt_irq_type, 1585 .flags = IRQCHIP_SKIP_SET_WAKE, 1586 }; 1587 1588 static void byt_gpio_irq_handler(struct irq_desc *desc) 1589 { 1590 struct irq_data *data = irq_desc_get_irq_data(desc); 1591 struct byt_gpio *vg = gpiochip_get_data( 1592 irq_desc_get_handler_data(desc)); 1593 struct irq_chip *chip = irq_data_get_irq_chip(data); 1594 u32 base, pin; 1595 void __iomem *reg; 1596 unsigned long pending; 1597 unsigned int virq; 1598 1599 /* check from GPIO controller which pin triggered the interrupt */ 1600 for (base = 0; base < vg->chip.ngpio; base += 32) { 1601 reg = byt_gpio_reg(vg, base, BYT_INT_STAT_REG); 1602 1603 if (!reg) { 1604 dev_warn(&vg->pdev->dev, 1605 "Pin %i: could not retrieve interrupt status register\n", 1606 base); 1607 continue; 1608 } 1609 1610 pending = readl(reg); 1611 for_each_set_bit(pin, &pending, 32) { 1612 virq = irq_find_mapping(vg->chip.irqdomain, base + pin); 1613 generic_handle_irq(virq); 1614 } 1615 } 1616 chip->irq_eoi(data); 1617 } 1618 1619 static void byt_gpio_irq_init_hw(struct byt_gpio *vg) 1620 { 1621 void __iomem *reg; 1622 u32 base, value; 1623 int i; 1624 1625 /* 1626 * Clear interrupt triggers for all pins that are GPIOs and 1627 * do not use direct IRQ mode. This will prevent spurious 1628 * interrupts from misconfigured pins. 1629 */ 1630 for (i = 0; i < vg->soc_data->npins; i++) { 1631 unsigned int pin = vg->soc_data->pins[i].number; 1632 1633 reg = byt_gpio_reg(vg, pin, BYT_CONF0_REG); 1634 if (!reg) { 1635 dev_warn(&vg->pdev->dev, 1636 "Pin %i: could not retrieve conf0 register\n", 1637 i); 1638 continue; 1639 } 1640 1641 value = readl(reg); 1642 if ((value & BYT_PIN_MUX) == byt_get_gpio_mux(vg, i) && 1643 !(value & BYT_DIRECT_IRQ_EN)) { 1644 byt_gpio_clear_triggering(vg, i); 1645 dev_dbg(&vg->pdev->dev, "disabling GPIO %d\n", i); 1646 } 1647 } 1648 1649 /* clear interrupt status trigger registers */ 1650 for (base = 0; base < vg->soc_data->npins; base += 32) { 1651 reg = byt_gpio_reg(vg, base, BYT_INT_STAT_REG); 1652 1653 if (!reg) { 1654 dev_warn(&vg->pdev->dev, 1655 "Pin %i: could not retrieve irq status reg\n", 1656 base); 1657 continue; 1658 } 1659 1660 writel(0xffffffff, reg); 1661 /* make sure trigger bits are cleared, if not then a pin 1662 might be misconfigured in bios */ 1663 value = readl(reg); 1664 if (value) 1665 dev_err(&vg->pdev->dev, 1666 "GPIO interrupt error, pins misconfigured\n"); 1667 } 1668 } 1669 1670 static int byt_gpio_probe(struct byt_gpio *vg) 1671 { 1672 struct gpio_chip *gc; 1673 struct resource *irq_rc; 1674 int ret; 1675 1676 /* Set up gpio chip */ 1677 vg->chip = byt_gpio_chip; 1678 gc = &vg->chip; 1679 gc->label = dev_name(&vg->pdev->dev); 1680 gc->base = -1; 1681 gc->can_sleep = false; 1682 gc->parent = &vg->pdev->dev; 1683 gc->ngpio = vg->soc_data->npins; 1684 1685 #ifdef CONFIG_PM_SLEEP 1686 vg->saved_context = devm_kcalloc(&vg->pdev->dev, gc->ngpio, 1687 sizeof(*vg->saved_context), GFP_KERNEL); 1688 #endif 1689 ret = gpiochip_add_data(gc, vg); 1690 if (ret) { 1691 dev_err(&vg->pdev->dev, "failed adding byt-gpio chip\n"); 1692 return ret; 1693 } 1694 1695 ret = gpiochip_add_pin_range(&vg->chip, dev_name(&vg->pdev->dev), 1696 0, 0, vg->soc_data->npins); 1697 if (ret) { 1698 dev_err(&vg->pdev->dev, "failed to add GPIO pin range\n"); 1699 goto fail; 1700 } 1701 1702 /* set up interrupts */ 1703 irq_rc = platform_get_resource(vg->pdev, IORESOURCE_IRQ, 0); 1704 if (irq_rc && irq_rc->start) { 1705 byt_gpio_irq_init_hw(vg); 1706 ret = gpiochip_irqchip_add(gc, &byt_irqchip, 0, 1707 handle_simple_irq, IRQ_TYPE_NONE); 1708 if (ret) { 1709 dev_err(&vg->pdev->dev, "failed to add irqchip\n"); 1710 goto fail; 1711 } 1712 1713 gpiochip_set_chained_irqchip(gc, &byt_irqchip, 1714 (unsigned)irq_rc->start, 1715 byt_gpio_irq_handler); 1716 } 1717 1718 return ret; 1719 1720 fail: 1721 gpiochip_remove(&vg->chip); 1722 1723 return ret; 1724 } 1725 1726 static int byt_set_soc_data(struct byt_gpio *vg, 1727 const struct byt_pinctrl_soc_data *soc_data) 1728 { 1729 int i; 1730 1731 vg->soc_data = soc_data; 1732 vg->communities_copy = devm_kcalloc(&vg->pdev->dev, 1733 soc_data->ncommunities, 1734 sizeof(*vg->communities_copy), 1735 GFP_KERNEL); 1736 if (!vg->communities_copy) 1737 return -ENOMEM; 1738 1739 for (i = 0; i < soc_data->ncommunities; i++) { 1740 struct byt_community *comm = vg->communities_copy + i; 1741 struct resource *mem_rc; 1742 1743 *comm = vg->soc_data->communities[i]; 1744 1745 mem_rc = platform_get_resource(vg->pdev, IORESOURCE_MEM, 0); 1746 comm->reg_base = devm_ioremap_resource(&vg->pdev->dev, mem_rc); 1747 if (IS_ERR(comm->reg_base)) 1748 return PTR_ERR(comm->reg_base); 1749 } 1750 1751 return 0; 1752 } 1753 1754 static const struct acpi_device_id byt_gpio_acpi_match[] = { 1755 { "INT33B2", (kernel_ulong_t)byt_soc_data }, 1756 { "INT33FC", (kernel_ulong_t)byt_soc_data }, 1757 { } 1758 }; 1759 MODULE_DEVICE_TABLE(acpi, byt_gpio_acpi_match); 1760 1761 static int byt_pinctrl_probe(struct platform_device *pdev) 1762 { 1763 const struct byt_pinctrl_soc_data *soc_data = NULL; 1764 const struct byt_pinctrl_soc_data **soc_table; 1765 const struct acpi_device_id *acpi_id; 1766 struct acpi_device *acpi_dev; 1767 struct byt_gpio *vg; 1768 int i, ret; 1769 1770 acpi_dev = ACPI_COMPANION(&pdev->dev); 1771 if (!acpi_dev) 1772 return -ENODEV; 1773 1774 acpi_id = acpi_match_device(byt_gpio_acpi_match, &pdev->dev); 1775 if (!acpi_id) 1776 return -ENODEV; 1777 1778 soc_table = (const struct byt_pinctrl_soc_data **)acpi_id->driver_data; 1779 1780 for (i = 0; soc_table[i]; i++) { 1781 if (!strcmp(acpi_dev->pnp.unique_id, soc_table[i]->uid)) { 1782 soc_data = soc_table[i]; 1783 break; 1784 } 1785 } 1786 1787 if (!soc_data) 1788 return -ENODEV; 1789 1790 vg = devm_kzalloc(&pdev->dev, sizeof(*vg), GFP_KERNEL); 1791 if (!vg) 1792 return -ENOMEM; 1793 1794 vg->pdev = pdev; 1795 ret = byt_set_soc_data(vg, soc_data); 1796 if (ret) { 1797 dev_err(&pdev->dev, "failed to set soc data\n"); 1798 return ret; 1799 } 1800 1801 vg->pctl_desc = byt_pinctrl_desc; 1802 vg->pctl_desc.name = dev_name(&pdev->dev); 1803 vg->pctl_desc.pins = vg->soc_data->pins; 1804 vg->pctl_desc.npins = vg->soc_data->npins; 1805 1806 vg->pctl_dev = pinctrl_register(&vg->pctl_desc, &pdev->dev, vg); 1807 if (IS_ERR(vg->pctl_dev)) { 1808 dev_err(&pdev->dev, "failed to register pinctrl driver\n"); 1809 return PTR_ERR(vg->pctl_dev); 1810 } 1811 1812 ret = byt_gpio_probe(vg); 1813 if (ret) { 1814 pinctrl_unregister(vg->pctl_dev); 1815 return ret; 1816 } 1817 1818 platform_set_drvdata(pdev, vg); 1819 raw_spin_lock_init(&vg->lock); 1820 pm_runtime_enable(&pdev->dev); 1821 1822 return 0; 1823 } 1824 1825 static int byt_pinctrl_remove(struct platform_device *pdev) 1826 { 1827 struct byt_gpio *vg = platform_get_drvdata(pdev); 1828 1829 pm_runtime_disable(&pdev->dev); 1830 gpiochip_remove(&vg->chip); 1831 pinctrl_unregister(vg->pctl_dev); 1832 1833 return 0; 1834 } 1835 1836 #ifdef CONFIG_PM_SLEEP 1837 static int byt_gpio_suspend(struct device *dev) 1838 { 1839 struct platform_device *pdev = to_platform_device(dev); 1840 struct byt_gpio *vg = platform_get_drvdata(pdev); 1841 int i; 1842 1843 for (i = 0; i < vg->soc_data->npins; i++) { 1844 void __iomem *reg; 1845 u32 value; 1846 unsigned int pin = vg->soc_data->pins[i].number; 1847 1848 reg = byt_gpio_reg(vg, pin, BYT_CONF0_REG); 1849 if (!reg) { 1850 dev_warn(&vg->pdev->dev, 1851 "Pin %i: could not retrieve conf0 register\n", 1852 i); 1853 continue; 1854 } 1855 value = readl(reg) & BYT_CONF0_RESTORE_MASK; 1856 vg->saved_context[i].conf0 = value; 1857 1858 reg = byt_gpio_reg(vg, pin, BYT_VAL_REG); 1859 value = readl(reg) & BYT_VAL_RESTORE_MASK; 1860 vg->saved_context[i].val = value; 1861 } 1862 1863 return 0; 1864 } 1865 1866 static int byt_gpio_resume(struct device *dev) 1867 { 1868 struct platform_device *pdev = to_platform_device(dev); 1869 struct byt_gpio *vg = platform_get_drvdata(pdev); 1870 int i; 1871 1872 for (i = 0; i < vg->soc_data->npins; i++) { 1873 void __iomem *reg; 1874 u32 value; 1875 unsigned int pin = vg->soc_data->pins[i].number; 1876 1877 reg = byt_gpio_reg(vg, pin, BYT_CONF0_REG); 1878 if (!reg) { 1879 dev_warn(&vg->pdev->dev, 1880 "Pin %i: could not retrieve conf0 register\n", 1881 i); 1882 continue; 1883 } 1884 value = readl(reg); 1885 if ((value & BYT_CONF0_RESTORE_MASK) != 1886 vg->saved_context[i].conf0) { 1887 value &= ~BYT_CONF0_RESTORE_MASK; 1888 value |= vg->saved_context[i].conf0; 1889 writel(value, reg); 1890 dev_info(dev, "restored pin %d conf0 %#08x", i, value); 1891 } 1892 1893 reg = byt_gpio_reg(vg, pin, BYT_VAL_REG); 1894 value = readl(reg); 1895 if ((value & BYT_VAL_RESTORE_MASK) != 1896 vg->saved_context[i].val) { 1897 u32 v; 1898 1899 v = value & ~BYT_VAL_RESTORE_MASK; 1900 v |= vg->saved_context[i].val; 1901 if (v != value) { 1902 writel(v, reg); 1903 dev_dbg(dev, "restored pin %d val %#08x\n", 1904 i, v); 1905 } 1906 } 1907 } 1908 1909 return 0; 1910 } 1911 #endif 1912 1913 #ifdef CONFIG_PM 1914 static int byt_gpio_runtime_suspend(struct device *dev) 1915 { 1916 return 0; 1917 } 1918 1919 static int byt_gpio_runtime_resume(struct device *dev) 1920 { 1921 return 0; 1922 } 1923 #endif 1924 1925 static const struct dev_pm_ops byt_gpio_pm_ops = { 1926 SET_LATE_SYSTEM_SLEEP_PM_OPS(byt_gpio_suspend, byt_gpio_resume) 1927 SET_RUNTIME_PM_OPS(byt_gpio_runtime_suspend, byt_gpio_runtime_resume, 1928 NULL) 1929 }; 1930 1931 static struct platform_driver byt_gpio_driver = { 1932 .probe = byt_pinctrl_probe, 1933 .remove = byt_pinctrl_remove, 1934 .driver = { 1935 .name = "byt_gpio", 1936 .pm = &byt_gpio_pm_ops, 1937 .acpi_match_table = ACPI_PTR(byt_gpio_acpi_match), 1938 }, 1939 }; 1940 1941 static int __init byt_gpio_init(void) 1942 { 1943 return platform_driver_register(&byt_gpio_driver); 1944 } 1945 subsys_initcall(byt_gpio_init); 1946 1947 static void __exit byt_gpio_exit(void) 1948 { 1949 platform_driver_unregister(&byt_gpio_driver); 1950 } 1951 module_exit(byt_gpio_exit); 1952