1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Pinctrl GPIO driver for Intel Baytrail 4 * 5 * Copyright (c) 2012-2013, Intel Corporation 6 * Author: Mathias Nyman <mathias.nyman@linux.intel.com> 7 */ 8 9 #include <linux/acpi.h> 10 #include <linux/bitops.h> 11 #include <linux/gpio/driver.h> 12 #include <linux/init.h> 13 #include <linux/interrupt.h> 14 #include <linux/io.h> 15 #include <linux/kernel.h> 16 #include <linux/types.h> 17 #include <linux/platform_device.h> 18 #include <linux/pm_runtime.h> 19 #include <linux/property.h> 20 #include <linux/seq_file.h> 21 22 #include <linux/pinctrl/pinctrl.h> 23 #include <linux/pinctrl/pinmux.h> 24 #include <linux/pinctrl/pinconf.h> 25 #include <linux/pinctrl/pinconf-generic.h> 26 27 #include "pinctrl-intel.h" 28 29 /* memory mapped register offsets */ 30 #define BYT_CONF0_REG 0x000 31 #define BYT_CONF1_REG 0x004 32 #define BYT_VAL_REG 0x008 33 #define BYT_DFT_REG 0x00c 34 #define BYT_INT_STAT_REG 0x800 35 #define BYT_DIRECT_IRQ_REG 0x980 36 #define BYT_DEBOUNCE_REG 0x9d0 37 38 /* BYT_CONF0_REG register bits */ 39 #define BYT_IODEN BIT(31) 40 #define BYT_DIRECT_IRQ_EN BIT(27) 41 #define BYT_TRIG_MASK GENMASK(26, 24) 42 #define BYT_TRIG_NEG BIT(26) 43 #define BYT_TRIG_POS BIT(25) 44 #define BYT_TRIG_LVL BIT(24) 45 #define BYT_DEBOUNCE_EN BIT(20) 46 #define BYT_GLITCH_FILTER_EN BIT(19) 47 #define BYT_GLITCH_F_SLOW_CLK BIT(17) 48 #define BYT_GLITCH_F_FAST_CLK BIT(16) 49 #define BYT_PULL_STR_SHIFT 9 50 #define BYT_PULL_STR_MASK GENMASK(10, 9) 51 #define BYT_PULL_STR_2K (0 << BYT_PULL_STR_SHIFT) 52 #define BYT_PULL_STR_10K (1 << BYT_PULL_STR_SHIFT) 53 #define BYT_PULL_STR_20K (2 << BYT_PULL_STR_SHIFT) 54 #define BYT_PULL_STR_40K (3 << BYT_PULL_STR_SHIFT) 55 #define BYT_PULL_ASSIGN_SHIFT 7 56 #define BYT_PULL_ASSIGN_MASK GENMASK(8, 7) 57 #define BYT_PULL_ASSIGN_UP (1 << BYT_PULL_ASSIGN_SHIFT) 58 #define BYT_PULL_ASSIGN_DOWN (2 << BYT_PULL_ASSIGN_SHIFT) 59 #define BYT_PIN_MUX GENMASK(2, 0) 60 61 /* BYT_VAL_REG register bits */ 62 #define BYT_DIR_MASK GENMASK(2, 1) 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_CONF0_RESTORE_MASK (BYT_DIRECT_IRQ_EN | BYT_TRIG_MASK | BYT_PIN_MUX) 68 #define BYT_VAL_RESTORE_MASK (BYT_DIR_MASK | BYT_LEVEL) 69 70 /* BYT_DEBOUNCE_REG bits */ 71 #define BYT_DEBOUNCE_PULSE_MASK GENMASK(2, 0) 72 #define BYT_DEBOUNCE_PULSE_375US 1 73 #define BYT_DEBOUNCE_PULSE_750US 2 74 #define BYT_DEBOUNCE_PULSE_1500US 3 75 #define BYT_DEBOUNCE_PULSE_3MS 4 76 #define BYT_DEBOUNCE_PULSE_6MS 5 77 #define BYT_DEBOUNCE_PULSE_12MS 6 78 #define BYT_DEBOUNCE_PULSE_24MS 7 79 80 #define BYT_NGPIO_SCORE 102 81 #define BYT_NGPIO_NCORE 28 82 #define BYT_NGPIO_SUS 44 83 84 #define BYT_SCORE_ACPI_UID "1" 85 #define BYT_NCORE_ACPI_UID "2" 86 #define BYT_SUS_ACPI_UID "3" 87 88 /* 89 * This is the function value most pins have for GPIO muxing. If the value 90 * differs from the default one, it must be explicitly mentioned. Otherwise, the 91 * pin control implementation will set the muxing value to default GPIO if it 92 * does not find a match for the requested function. 93 */ 94 #define BYT_DEFAULT_GPIO_MUX 0 95 #define BYT_ALTER_GPIO_MUX 1 96 97 struct intel_pad_context { 98 u32 conf0; 99 u32 val; 100 }; 101 102 #define COMMUNITY(p, n, map) \ 103 { \ 104 .pin_base = (p), \ 105 .npins = (n), \ 106 .pad_map = (map),\ 107 } 108 109 /* SCORE pins, aka GPIOC_<pin_no> or GPIO_S0_SC[<pin_no>] */ 110 static const struct pinctrl_pin_desc byt_score_pins[] = { 111 PINCTRL_PIN(0, "SATA_GP0"), 112 PINCTRL_PIN(1, "SATA_GP1"), 113 PINCTRL_PIN(2, "SATA_LED#"), 114 PINCTRL_PIN(3, "PCIE_CLKREQ0"), 115 PINCTRL_PIN(4, "PCIE_CLKREQ1"), 116 PINCTRL_PIN(5, "PCIE_CLKREQ2"), 117 PINCTRL_PIN(6, "PCIE_CLKREQ3"), 118 PINCTRL_PIN(7, "SD3_WP"), 119 PINCTRL_PIN(8, "HDA_RST"), 120 PINCTRL_PIN(9, "HDA_SYNC"), 121 PINCTRL_PIN(10, "HDA_CLK"), 122 PINCTRL_PIN(11, "HDA_SDO"), 123 PINCTRL_PIN(12, "HDA_SDI0"), 124 PINCTRL_PIN(13, "HDA_SDI1"), 125 PINCTRL_PIN(14, "GPIO_S0_SC14"), 126 PINCTRL_PIN(15, "GPIO_S0_SC15"), 127 PINCTRL_PIN(16, "MMC1_CLK"), 128 PINCTRL_PIN(17, "MMC1_D0"), 129 PINCTRL_PIN(18, "MMC1_D1"), 130 PINCTRL_PIN(19, "MMC1_D2"), 131 PINCTRL_PIN(20, "MMC1_D3"), 132 PINCTRL_PIN(21, "MMC1_D4"), 133 PINCTRL_PIN(22, "MMC1_D5"), 134 PINCTRL_PIN(23, "MMC1_D6"), 135 PINCTRL_PIN(24, "MMC1_D7"), 136 PINCTRL_PIN(25, "MMC1_CMD"), 137 PINCTRL_PIN(26, "MMC1_RST"), 138 PINCTRL_PIN(27, "SD2_CLK"), 139 PINCTRL_PIN(28, "SD2_D0"), 140 PINCTRL_PIN(29, "SD2_D1"), 141 PINCTRL_PIN(30, "SD2_D2"), 142 PINCTRL_PIN(31, "SD2_D3_CD"), 143 PINCTRL_PIN(32, "SD2_CMD"), 144 PINCTRL_PIN(33, "SD3_CLK"), 145 PINCTRL_PIN(34, "SD3_D0"), 146 PINCTRL_PIN(35, "SD3_D1"), 147 PINCTRL_PIN(36, "SD3_D2"), 148 PINCTRL_PIN(37, "SD3_D3"), 149 PINCTRL_PIN(38, "SD3_CD"), 150 PINCTRL_PIN(39, "SD3_CMD"), 151 PINCTRL_PIN(40, "SD3_1P8EN"), 152 PINCTRL_PIN(41, "SD3_PWREN#"), 153 PINCTRL_PIN(42, "ILB_LPC_AD0"), 154 PINCTRL_PIN(43, "ILB_LPC_AD1"), 155 PINCTRL_PIN(44, "ILB_LPC_AD2"), 156 PINCTRL_PIN(45, "ILB_LPC_AD3"), 157 PINCTRL_PIN(46, "ILB_LPC_FRAME"), 158 PINCTRL_PIN(47, "ILB_LPC_CLK0"), 159 PINCTRL_PIN(48, "ILB_LPC_CLK1"), 160 PINCTRL_PIN(49, "ILB_LPC_CLKRUN"), 161 PINCTRL_PIN(50, "ILB_LPC_SERIRQ"), 162 PINCTRL_PIN(51, "PCU_SMB_DATA"), 163 PINCTRL_PIN(52, "PCU_SMB_CLK"), 164 PINCTRL_PIN(53, "PCU_SMB_ALERT"), 165 PINCTRL_PIN(54, "ILB_8254_SPKR"), 166 PINCTRL_PIN(55, "GPIO_S0_SC55"), 167 PINCTRL_PIN(56, "GPIO_S0_SC56"), 168 PINCTRL_PIN(57, "GPIO_S0_SC57"), 169 PINCTRL_PIN(58, "GPIO_S0_SC58"), 170 PINCTRL_PIN(59, "GPIO_S0_SC59"), 171 PINCTRL_PIN(60, "GPIO_S0_SC60"), 172 PINCTRL_PIN(61, "GPIO_S0_SC61"), 173 PINCTRL_PIN(62, "LPE_I2S2_CLK"), 174 PINCTRL_PIN(63, "LPE_I2S2_FRM"), 175 PINCTRL_PIN(64, "LPE_I2S2_DATAIN"), 176 PINCTRL_PIN(65, "LPE_I2S2_DATAOUT"), 177 PINCTRL_PIN(66, "SIO_SPI_CS"), 178 PINCTRL_PIN(67, "SIO_SPI_MISO"), 179 PINCTRL_PIN(68, "SIO_SPI_MOSI"), 180 PINCTRL_PIN(69, "SIO_SPI_CLK"), 181 PINCTRL_PIN(70, "SIO_UART1_RXD"), 182 PINCTRL_PIN(71, "SIO_UART1_TXD"), 183 PINCTRL_PIN(72, "SIO_UART1_RTS"), 184 PINCTRL_PIN(73, "SIO_UART1_CTS"), 185 PINCTRL_PIN(74, "SIO_UART2_RXD"), 186 PINCTRL_PIN(75, "SIO_UART2_TXD"), 187 PINCTRL_PIN(76, "SIO_UART2_RTS"), 188 PINCTRL_PIN(77, "SIO_UART2_CTS"), 189 PINCTRL_PIN(78, "SIO_I2C0_DATA"), 190 PINCTRL_PIN(79, "SIO_I2C0_CLK"), 191 PINCTRL_PIN(80, "SIO_I2C1_DATA"), 192 PINCTRL_PIN(81, "SIO_I2C1_CLK"), 193 PINCTRL_PIN(82, "SIO_I2C2_DATA"), 194 PINCTRL_PIN(83, "SIO_I2C2_CLK"), 195 PINCTRL_PIN(84, "SIO_I2C3_DATA"), 196 PINCTRL_PIN(85, "SIO_I2C3_CLK"), 197 PINCTRL_PIN(86, "SIO_I2C4_DATA"), 198 PINCTRL_PIN(87, "SIO_I2C4_CLK"), 199 PINCTRL_PIN(88, "SIO_I2C5_DATA"), 200 PINCTRL_PIN(89, "SIO_I2C5_CLK"), 201 PINCTRL_PIN(90, "SIO_I2C6_DATA"), 202 PINCTRL_PIN(91, "SIO_I2C6_CLK"), 203 PINCTRL_PIN(92, "GPIO_S0_SC92"), 204 PINCTRL_PIN(93, "GPIO_S0_SC93"), 205 PINCTRL_PIN(94, "SIO_PWM0"), 206 PINCTRL_PIN(95, "SIO_PWM1"), 207 PINCTRL_PIN(96, "PMC_PLT_CLK0"), 208 PINCTRL_PIN(97, "PMC_PLT_CLK1"), 209 PINCTRL_PIN(98, "PMC_PLT_CLK2"), 210 PINCTRL_PIN(99, "PMC_PLT_CLK3"), 211 PINCTRL_PIN(100, "PMC_PLT_CLK4"), 212 PINCTRL_PIN(101, "PMC_PLT_CLK5"), 213 }; 214 215 static const unsigned int byt_score_pins_map[BYT_NGPIO_SCORE] = { 216 85, 89, 93, 96, 99, 102, 98, 101, 34, 37, 217 36, 38, 39, 35, 40, 84, 62, 61, 64, 59, 218 54, 56, 60, 55, 63, 57, 51, 50, 53, 47, 219 52, 49, 48, 43, 46, 41, 45, 42, 58, 44, 220 95, 105, 70, 68, 67, 66, 69, 71, 65, 72, 221 86, 90, 88, 92, 103, 77, 79, 83, 78, 81, 222 80, 82, 13, 12, 15, 14, 17, 18, 19, 16, 223 2, 1, 0, 4, 6, 7, 9, 8, 33, 32, 224 31, 30, 29, 27, 25, 28, 26, 23, 21, 20, 225 24, 22, 5, 3, 10, 11, 106, 87, 91, 104, 226 97, 100, 227 }; 228 229 /* SCORE groups */ 230 static const unsigned int byt_score_uart1_pins[] = { 70, 71, 72, 73 }; 231 static const unsigned int byt_score_uart2_pins[] = { 74, 75, 76, 77 }; 232 233 static const unsigned int byt_score_pwm0_pins[] = { 94 }; 234 static const unsigned int byt_score_pwm1_pins[] = { 95 }; 235 236 static const unsigned int byt_score_sio_spi_pins[] = { 66, 67, 68, 69 }; 237 238 static const unsigned int byt_score_i2c5_pins[] = { 88, 89 }; 239 static const unsigned int byt_score_i2c6_pins[] = { 90, 91 }; 240 static const unsigned int byt_score_i2c4_pins[] = { 86, 87 }; 241 static const unsigned int byt_score_i2c3_pins[] = { 84, 85 }; 242 static const unsigned int byt_score_i2c2_pins[] = { 82, 83 }; 243 static const unsigned int byt_score_i2c1_pins[] = { 80, 81 }; 244 static const unsigned int byt_score_i2c0_pins[] = { 78, 79 }; 245 246 static const unsigned int byt_score_ssp0_pins[] = { 8, 9, 10, 11 }; 247 static const unsigned int byt_score_ssp1_pins[] = { 12, 13, 14, 15 }; 248 static const unsigned int byt_score_ssp2_pins[] = { 62, 63, 64, 65 }; 249 250 static const unsigned int byt_score_sdcard_pins[] = { 251 7, 33, 34, 35, 36, 37, 38, 39, 40, 41, 252 }; 253 static const unsigned int byt_score_sdcard_mux_values[] = { 254 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 255 }; 256 257 static const unsigned int byt_score_sdio_pins[] = { 27, 28, 29, 30, 31, 32 }; 258 259 static const unsigned int byt_score_emmc_pins[] = { 260 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 261 }; 262 263 static const unsigned int byt_score_ilb_lpc_pins[] = { 264 42, 43, 44, 45, 46, 47, 48, 49, 50, 265 }; 266 267 static const unsigned int byt_score_sata_pins[] = { 0, 1, 2 }; 268 269 static const unsigned int byt_score_plt_clk0_pins[] = { 96 }; 270 static const unsigned int byt_score_plt_clk1_pins[] = { 97 }; 271 static const unsigned int byt_score_plt_clk2_pins[] = { 98 }; 272 static const unsigned int byt_score_plt_clk3_pins[] = { 99 }; 273 static const unsigned int byt_score_plt_clk4_pins[] = { 100 }; 274 static const unsigned int byt_score_plt_clk5_pins[] = { 101 }; 275 276 static const unsigned int byt_score_smbus_pins[] = { 51, 52, 53 }; 277 278 static const struct intel_pingroup byt_score_groups[] = { 279 PIN_GROUP("uart1_grp", byt_score_uart1_pins, 1), 280 PIN_GROUP("uart2_grp", byt_score_uart2_pins, 1), 281 PIN_GROUP("pwm0_grp", byt_score_pwm0_pins, 1), 282 PIN_GROUP("pwm1_grp", byt_score_pwm1_pins, 1), 283 PIN_GROUP("ssp2_grp", byt_score_ssp2_pins, 1), 284 PIN_GROUP("sio_spi_grp", byt_score_sio_spi_pins, 1), 285 PIN_GROUP("i2c5_grp", byt_score_i2c5_pins, 1), 286 PIN_GROUP("i2c6_grp", byt_score_i2c6_pins, 1), 287 PIN_GROUP("i2c4_grp", byt_score_i2c4_pins, 1), 288 PIN_GROUP("i2c3_grp", byt_score_i2c3_pins, 1), 289 PIN_GROUP("i2c2_grp", byt_score_i2c2_pins, 1), 290 PIN_GROUP("i2c1_grp", byt_score_i2c1_pins, 1), 291 PIN_GROUP("i2c0_grp", byt_score_i2c0_pins, 1), 292 PIN_GROUP("ssp0_grp", byt_score_ssp0_pins, 1), 293 PIN_GROUP("ssp1_grp", byt_score_ssp1_pins, 1), 294 PIN_GROUP("sdcard_grp", byt_score_sdcard_pins, byt_score_sdcard_mux_values), 295 PIN_GROUP("sdio_grp", byt_score_sdio_pins, 1), 296 PIN_GROUP("emmc_grp", byt_score_emmc_pins, 1), 297 PIN_GROUP("lpc_grp", byt_score_ilb_lpc_pins, 1), 298 PIN_GROUP("sata_grp", byt_score_sata_pins, 1), 299 PIN_GROUP("plt_clk0_grp", byt_score_plt_clk0_pins, 1), 300 PIN_GROUP("plt_clk1_grp", byt_score_plt_clk1_pins, 1), 301 PIN_GROUP("plt_clk2_grp", byt_score_plt_clk2_pins, 1), 302 PIN_GROUP("plt_clk3_grp", byt_score_plt_clk3_pins, 1), 303 PIN_GROUP("plt_clk4_grp", byt_score_plt_clk4_pins, 1), 304 PIN_GROUP("plt_clk5_grp", byt_score_plt_clk5_pins, 1), 305 PIN_GROUP("smbus_grp", byt_score_smbus_pins, 1), 306 }; 307 308 static const char * const byt_score_uart_groups[] = { 309 "uart1_grp", "uart2_grp", 310 }; 311 static const char * const byt_score_pwm_groups[] = { 312 "pwm0_grp", "pwm1_grp", 313 }; 314 static const char * const byt_score_ssp_groups[] = { 315 "ssp0_grp", "ssp1_grp", "ssp2_grp", 316 }; 317 static const char * const byt_score_spi_groups[] = { "sio_spi_grp" }; 318 static const char * const byt_score_i2c_groups[] = { 319 "i2c0_grp", "i2c1_grp", "i2c2_grp", "i2c3_grp", "i2c4_grp", "i2c5_grp", 320 "i2c6_grp", 321 }; 322 static const char * const byt_score_sdcard_groups[] = { "sdcard_grp" }; 323 static const char * const byt_score_sdio_groups[] = { "sdio_grp" }; 324 static const char * const byt_score_emmc_groups[] = { "emmc_grp" }; 325 static const char * const byt_score_lpc_groups[] = { "lpc_grp" }; 326 static const char * const byt_score_sata_groups[] = { "sata_grp" }; 327 static const char * const byt_score_plt_clk_groups[] = { 328 "plt_clk0_grp", "plt_clk1_grp", "plt_clk2_grp", "plt_clk3_grp", 329 "plt_clk4_grp", "plt_clk5_grp", 330 }; 331 static const char * const byt_score_smbus_groups[] = { "smbus_grp" }; 332 static const char * const byt_score_gpio_groups[] = { 333 "uart1_grp", "uart2_grp", "pwm0_grp", "pwm1_grp", "ssp0_grp", 334 "ssp1_grp", "ssp2_grp", "sio_spi_grp", "i2c0_grp", "i2c1_grp", 335 "i2c2_grp", "i2c3_grp", "i2c4_grp", "i2c5_grp", "i2c6_grp", 336 "sdcard_grp", "sdio_grp", "emmc_grp", "lpc_grp", "sata_grp", 337 "plt_clk0_grp", "plt_clk1_grp", "plt_clk2_grp", "plt_clk3_grp", 338 "plt_clk4_grp", "plt_clk5_grp", "smbus_grp", 339 }; 340 341 static const struct intel_function byt_score_functions[] = { 342 FUNCTION("uart", byt_score_uart_groups), 343 FUNCTION("pwm", byt_score_pwm_groups), 344 FUNCTION("ssp", byt_score_ssp_groups), 345 FUNCTION("spi", byt_score_spi_groups), 346 FUNCTION("i2c", byt_score_i2c_groups), 347 FUNCTION("sdcard", byt_score_sdcard_groups), 348 FUNCTION("sdio", byt_score_sdio_groups), 349 FUNCTION("emmc", byt_score_emmc_groups), 350 FUNCTION("lpc", byt_score_lpc_groups), 351 FUNCTION("sata", byt_score_sata_groups), 352 FUNCTION("plt_clk", byt_score_plt_clk_groups), 353 FUNCTION("smbus", byt_score_smbus_groups), 354 FUNCTION("gpio", byt_score_gpio_groups), 355 }; 356 357 static const struct intel_community byt_score_communities[] = { 358 COMMUNITY(0, BYT_NGPIO_SCORE, byt_score_pins_map), 359 }; 360 361 static const struct intel_pinctrl_soc_data byt_score_soc_data = { 362 .uid = BYT_SCORE_ACPI_UID, 363 .pins = byt_score_pins, 364 .npins = ARRAY_SIZE(byt_score_pins), 365 .groups = byt_score_groups, 366 .ngroups = ARRAY_SIZE(byt_score_groups), 367 .functions = byt_score_functions, 368 .nfunctions = ARRAY_SIZE(byt_score_functions), 369 .communities = byt_score_communities, 370 .ncommunities = ARRAY_SIZE(byt_score_communities), 371 }; 372 373 /* SUS pins, aka GPIOS_<pin_no> or GPIO_S5[<pin_no>] */ 374 static const struct pinctrl_pin_desc byt_sus_pins[] = { 375 PINCTRL_PIN(0, "GPIO_S50"), 376 PINCTRL_PIN(1, "GPIO_S51"), 377 PINCTRL_PIN(2, "GPIO_S52"), 378 PINCTRL_PIN(3, "GPIO_S53"), 379 PINCTRL_PIN(4, "GPIO_S54"), 380 PINCTRL_PIN(5, "GPIO_S55"), 381 PINCTRL_PIN(6, "GPIO_S56"), 382 PINCTRL_PIN(7, "GPIO_S57"), 383 PINCTRL_PIN(8, "GPIO_S58"), 384 PINCTRL_PIN(9, "GPIO_S59"), 385 PINCTRL_PIN(10, "GPIO_S510"), 386 PINCTRL_PIN(11, "PMC_SUSPWRDNACK"), 387 PINCTRL_PIN(12, "PMC_SUSCLK0"), 388 PINCTRL_PIN(13, "GPIO_S513"), 389 PINCTRL_PIN(14, "USB_ULPI_RST"), 390 PINCTRL_PIN(15, "PMC_WAKE_PCIE0#"), 391 PINCTRL_PIN(16, "PMC_PWRBTN"), 392 PINCTRL_PIN(17, "GPIO_S517"), 393 PINCTRL_PIN(18, "PMC_SUS_STAT"), 394 PINCTRL_PIN(19, "USB_OC0"), 395 PINCTRL_PIN(20, "USB_OC1"), 396 PINCTRL_PIN(21, "PCU_SPI_CS1"), 397 PINCTRL_PIN(22, "GPIO_S522"), 398 PINCTRL_PIN(23, "GPIO_S523"), 399 PINCTRL_PIN(24, "GPIO_S524"), 400 PINCTRL_PIN(25, "GPIO_S525"), 401 PINCTRL_PIN(26, "GPIO_S526"), 402 PINCTRL_PIN(27, "GPIO_S527"), 403 PINCTRL_PIN(28, "GPIO_S528"), 404 PINCTRL_PIN(29, "GPIO_S529"), 405 PINCTRL_PIN(30, "GPIO_S530"), 406 PINCTRL_PIN(31, "USB_ULPI_CLK"), 407 PINCTRL_PIN(32, "USB_ULPI_DATA0"), 408 PINCTRL_PIN(33, "USB_ULPI_DATA1"), 409 PINCTRL_PIN(34, "USB_ULPI_DATA2"), 410 PINCTRL_PIN(35, "USB_ULPI_DATA3"), 411 PINCTRL_PIN(36, "USB_ULPI_DATA4"), 412 PINCTRL_PIN(37, "USB_ULPI_DATA5"), 413 PINCTRL_PIN(38, "USB_ULPI_DATA6"), 414 PINCTRL_PIN(39, "USB_ULPI_DATA7"), 415 PINCTRL_PIN(40, "USB_ULPI_DIR"), 416 PINCTRL_PIN(41, "USB_ULPI_NXT"), 417 PINCTRL_PIN(42, "USB_ULPI_STP"), 418 PINCTRL_PIN(43, "USB_ULPI_REFCLK"), 419 }; 420 421 static const unsigned int byt_sus_pins_map[BYT_NGPIO_SUS] = { 422 29, 33, 30, 31, 32, 34, 36, 35, 38, 37, 423 18, 7, 11, 20, 17, 1, 8, 10, 19, 12, 424 0, 2, 23, 39, 28, 27, 22, 21, 24, 25, 425 26, 51, 56, 54, 49, 55, 48, 57, 50, 58, 426 52, 53, 59, 40, 427 }; 428 429 static const unsigned int byt_sus_usb_over_current_pins[] = { 19, 20 }; 430 static const unsigned int byt_sus_usb_over_current_mode_values[] = { 0, 0 }; 431 static const unsigned int byt_sus_usb_over_current_gpio_mode_values[] = { 1, 1 }; 432 433 static const unsigned int byt_sus_usb_ulpi_pins[] = { 434 14, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 435 }; 436 static const unsigned int byt_sus_usb_ulpi_mode_values[] = { 437 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 438 }; 439 static const unsigned int byt_sus_usb_ulpi_gpio_mode_values[] = { 440 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 441 }; 442 443 static const unsigned int byt_sus_pcu_spi_pins[] = { 21 }; 444 static const unsigned int byt_sus_pcu_spi_mode_values[] = { 0 }; 445 static const unsigned int byt_sus_pcu_spi_gpio_mode_values[] = { 1 }; 446 447 static const unsigned int byt_sus_pmu_clk1_pins[] = { 5 }; 448 static const unsigned int byt_sus_pmu_clk2_pins[] = { 6 }; 449 450 static const struct intel_pingroup byt_sus_groups[] = { 451 PIN_GROUP("usb_oc_grp", byt_sus_usb_over_current_pins, byt_sus_usb_over_current_mode_values), 452 PIN_GROUP("usb_ulpi_grp", byt_sus_usb_ulpi_pins, byt_sus_usb_ulpi_mode_values), 453 PIN_GROUP("pcu_spi_grp", byt_sus_pcu_spi_pins, byt_sus_pcu_spi_mode_values), 454 PIN_GROUP("usb_oc_grp_gpio", byt_sus_usb_over_current_pins, byt_sus_usb_over_current_gpio_mode_values), 455 PIN_GROUP("usb_ulpi_grp_gpio", byt_sus_usb_ulpi_pins, byt_sus_usb_ulpi_gpio_mode_values), 456 PIN_GROUP("pcu_spi_grp_gpio", byt_sus_pcu_spi_pins, byt_sus_pcu_spi_gpio_mode_values), 457 PIN_GROUP("pmu_clk1_grp", byt_sus_pmu_clk1_pins, 1), 458 PIN_GROUP("pmu_clk2_grp", byt_sus_pmu_clk2_pins, 1), 459 }; 460 461 static const char * const byt_sus_usb_groups[] = { 462 "usb_oc_grp", "usb_ulpi_grp", 463 }; 464 static const char * const byt_sus_spi_groups[] = { "pcu_spi_grp" }; 465 static const char * const byt_sus_pmu_clk_groups[] = { 466 "pmu_clk1_grp", "pmu_clk2_grp", 467 }; 468 static const char * const byt_sus_gpio_groups[] = { 469 "usb_oc_grp_gpio", "usb_ulpi_grp_gpio", "pcu_spi_grp_gpio", 470 "pmu_clk1_grp", "pmu_clk2_grp", 471 }; 472 473 static const struct intel_function byt_sus_functions[] = { 474 FUNCTION("usb", byt_sus_usb_groups), 475 FUNCTION("spi", byt_sus_spi_groups), 476 FUNCTION("gpio", byt_sus_gpio_groups), 477 FUNCTION("pmu_clk", byt_sus_pmu_clk_groups), 478 }; 479 480 static const struct intel_community byt_sus_communities[] = { 481 COMMUNITY(0, BYT_NGPIO_SUS, byt_sus_pins_map), 482 }; 483 484 static const struct intel_pinctrl_soc_data byt_sus_soc_data = { 485 .uid = BYT_SUS_ACPI_UID, 486 .pins = byt_sus_pins, 487 .npins = ARRAY_SIZE(byt_sus_pins), 488 .groups = byt_sus_groups, 489 .ngroups = ARRAY_SIZE(byt_sus_groups), 490 .functions = byt_sus_functions, 491 .nfunctions = ARRAY_SIZE(byt_sus_functions), 492 .communities = byt_sus_communities, 493 .ncommunities = ARRAY_SIZE(byt_sus_communities), 494 }; 495 496 static const struct pinctrl_pin_desc byt_ncore_pins[] = { 497 PINCTRL_PIN(0, "HV_DDI0_HPD"), 498 PINCTRL_PIN(1, "HV_DDI0_DDC_SDA"), 499 PINCTRL_PIN(2, "HV_DDI0_DDC_SCL"), 500 PINCTRL_PIN(3, "PANEL0_VDDEN"), 501 PINCTRL_PIN(4, "PANEL0_BKLTEN"), 502 PINCTRL_PIN(5, "PANEL0_BKLTCTL"), 503 PINCTRL_PIN(6, "HV_DDI1_HPD"), 504 PINCTRL_PIN(7, "HV_DDI1_DDC_SDA"), 505 PINCTRL_PIN(8, "HV_DDI1_DDC_SCL"), 506 PINCTRL_PIN(9, "PANEL1_VDDEN"), 507 PINCTRL_PIN(10, "PANEL1_BKLTEN"), 508 PINCTRL_PIN(11, "PANEL1_BKLTCTL"), 509 PINCTRL_PIN(12, "GP_INTD_DSI_TE1"), 510 PINCTRL_PIN(13, "HV_DDI2_DDC_SDA"), 511 PINCTRL_PIN(14, "HV_DDI2_DDC_SCL"), 512 PINCTRL_PIN(15, "GP_CAMERASB00"), 513 PINCTRL_PIN(16, "GP_CAMERASB01"), 514 PINCTRL_PIN(17, "GP_CAMERASB02"), 515 PINCTRL_PIN(18, "GP_CAMERASB03"), 516 PINCTRL_PIN(19, "GP_CAMERASB04"), 517 PINCTRL_PIN(20, "GP_CAMERASB05"), 518 PINCTRL_PIN(21, "GP_CAMERASB06"), 519 PINCTRL_PIN(22, "GP_CAMERASB07"), 520 PINCTRL_PIN(23, "GP_CAMERASB08"), 521 PINCTRL_PIN(24, "GP_CAMERASB09"), 522 PINCTRL_PIN(25, "GP_CAMERASB10"), 523 PINCTRL_PIN(26, "GP_CAMERASB11"), 524 PINCTRL_PIN(27, "GP_INTD_DSI_TE2"), 525 }; 526 527 static const unsigned int byt_ncore_pins_map[BYT_NGPIO_NCORE] = { 528 19, 18, 17, 20, 21, 22, 24, 25, 23, 16, 529 14, 15, 12, 26, 27, 1, 4, 8, 11, 0, 530 3, 6, 10, 13, 2, 5, 9, 7, 531 }; 532 533 static const struct intel_community byt_ncore_communities[] = { 534 COMMUNITY(0, BYT_NGPIO_NCORE, byt_ncore_pins_map), 535 }; 536 537 static const struct intel_pinctrl_soc_data byt_ncore_soc_data = { 538 .uid = BYT_NCORE_ACPI_UID, 539 .pins = byt_ncore_pins, 540 .npins = ARRAY_SIZE(byt_ncore_pins), 541 .communities = byt_ncore_communities, 542 .ncommunities = ARRAY_SIZE(byt_ncore_communities), 543 }; 544 545 static const struct intel_pinctrl_soc_data *byt_soc_data[] = { 546 &byt_score_soc_data, 547 &byt_sus_soc_data, 548 &byt_ncore_soc_data, 549 NULL 550 }; 551 552 static DEFINE_RAW_SPINLOCK(byt_lock); 553 554 static struct intel_community *byt_get_community(struct intel_pinctrl *vg, 555 unsigned int pin) 556 { 557 struct intel_community *comm; 558 int i; 559 560 for (i = 0; i < vg->ncommunities; i++) { 561 comm = vg->communities + i; 562 if (pin < comm->pin_base + comm->npins && pin >= comm->pin_base) 563 return comm; 564 } 565 566 return NULL; 567 } 568 569 static void __iomem *byt_gpio_reg(struct intel_pinctrl *vg, unsigned int offset, 570 int reg) 571 { 572 struct intel_community *comm = byt_get_community(vg, offset); 573 u32 reg_offset; 574 575 if (!comm) 576 return NULL; 577 578 offset -= comm->pin_base; 579 switch (reg) { 580 case BYT_INT_STAT_REG: 581 reg_offset = (offset / 32) * 4; 582 break; 583 case BYT_DEBOUNCE_REG: 584 reg_offset = 0; 585 break; 586 default: 587 reg_offset = comm->pad_map[offset] * 16; 588 break; 589 } 590 591 return comm->pad_regs + reg_offset + reg; 592 } 593 594 static int byt_get_groups_count(struct pinctrl_dev *pctldev) 595 { 596 struct intel_pinctrl *vg = pinctrl_dev_get_drvdata(pctldev); 597 598 return vg->soc->ngroups; 599 } 600 601 static const char *byt_get_group_name(struct pinctrl_dev *pctldev, 602 unsigned int selector) 603 { 604 struct intel_pinctrl *vg = pinctrl_dev_get_drvdata(pctldev); 605 606 return vg->soc->groups[selector].grp.name; 607 } 608 609 static int byt_get_group_pins(struct pinctrl_dev *pctldev, 610 unsigned int selector, 611 const unsigned int **pins, 612 unsigned int *num_pins) 613 { 614 struct intel_pinctrl *vg = pinctrl_dev_get_drvdata(pctldev); 615 616 *pins = vg->soc->groups[selector].grp.pins; 617 *num_pins = vg->soc->groups[selector].grp.npins; 618 619 return 0; 620 } 621 622 static const struct pinctrl_ops byt_pinctrl_ops = { 623 .get_groups_count = byt_get_groups_count, 624 .get_group_name = byt_get_group_name, 625 .get_group_pins = byt_get_group_pins, 626 }; 627 628 static int byt_get_functions_count(struct pinctrl_dev *pctldev) 629 { 630 struct intel_pinctrl *vg = pinctrl_dev_get_drvdata(pctldev); 631 632 return vg->soc->nfunctions; 633 } 634 635 static const char *byt_get_function_name(struct pinctrl_dev *pctldev, 636 unsigned int selector) 637 { 638 struct intel_pinctrl *vg = pinctrl_dev_get_drvdata(pctldev); 639 640 return vg->soc->functions[selector].name; 641 } 642 643 static int byt_get_function_groups(struct pinctrl_dev *pctldev, 644 unsigned int selector, 645 const char * const **groups, 646 unsigned int *num_groups) 647 { 648 struct intel_pinctrl *vg = pinctrl_dev_get_drvdata(pctldev); 649 650 *groups = vg->soc->functions[selector].groups; 651 *num_groups = vg->soc->functions[selector].ngroups; 652 653 return 0; 654 } 655 656 static void byt_set_group_simple_mux(struct intel_pinctrl *vg, 657 const struct intel_pingroup group, 658 unsigned int func) 659 { 660 unsigned long flags; 661 int i; 662 663 raw_spin_lock_irqsave(&byt_lock, flags); 664 665 for (i = 0; i < group.grp.npins; i++) { 666 void __iomem *padcfg0; 667 u32 value; 668 669 padcfg0 = byt_gpio_reg(vg, group.grp.pins[i], BYT_CONF0_REG); 670 if (!padcfg0) { 671 dev_warn(vg->dev, 672 "Group %s, pin %i not muxed (no padcfg0)\n", 673 group.grp.name, i); 674 continue; 675 } 676 677 value = readl(padcfg0); 678 value &= ~BYT_PIN_MUX; 679 value |= func; 680 writel(value, padcfg0); 681 } 682 683 raw_spin_unlock_irqrestore(&byt_lock, flags); 684 } 685 686 static void byt_set_group_mixed_mux(struct intel_pinctrl *vg, 687 const struct intel_pingroup group, 688 const unsigned int *func) 689 { 690 unsigned long flags; 691 int i; 692 693 raw_spin_lock_irqsave(&byt_lock, flags); 694 695 for (i = 0; i < group.grp.npins; i++) { 696 void __iomem *padcfg0; 697 u32 value; 698 699 padcfg0 = byt_gpio_reg(vg, group.grp.pins[i], BYT_CONF0_REG); 700 if (!padcfg0) { 701 dev_warn(vg->dev, 702 "Group %s, pin %i not muxed (no padcfg0)\n", 703 group.grp.name, i); 704 continue; 705 } 706 707 value = readl(padcfg0); 708 value &= ~BYT_PIN_MUX; 709 value |= func[i]; 710 writel(value, padcfg0); 711 } 712 713 raw_spin_unlock_irqrestore(&byt_lock, flags); 714 } 715 716 static int byt_set_mux(struct pinctrl_dev *pctldev, unsigned int func_selector, 717 unsigned int group_selector) 718 { 719 struct intel_pinctrl *vg = pinctrl_dev_get_drvdata(pctldev); 720 const struct intel_function func = vg->soc->functions[func_selector]; 721 const struct intel_pingroup group = vg->soc->groups[group_selector]; 722 723 if (group.modes) 724 byt_set_group_mixed_mux(vg, group, group.modes); 725 else if (!strcmp(func.name, "gpio")) 726 byt_set_group_simple_mux(vg, group, BYT_DEFAULT_GPIO_MUX); 727 else 728 byt_set_group_simple_mux(vg, group, group.mode); 729 730 return 0; 731 } 732 733 static u32 byt_get_gpio_mux(struct intel_pinctrl *vg, unsigned int offset) 734 { 735 /* SCORE pin 92-93 */ 736 if (!strcmp(vg->soc->uid, BYT_SCORE_ACPI_UID) && 737 offset >= 92 && offset <= 93) 738 return BYT_ALTER_GPIO_MUX; 739 740 /* SUS pin 11-21 */ 741 if (!strcmp(vg->soc->uid, BYT_SUS_ACPI_UID) && 742 offset >= 11 && offset <= 21) 743 return BYT_ALTER_GPIO_MUX; 744 745 return BYT_DEFAULT_GPIO_MUX; 746 } 747 748 static void byt_gpio_clear_triggering(struct intel_pinctrl *vg, unsigned int offset) 749 { 750 void __iomem *reg = byt_gpio_reg(vg, offset, BYT_CONF0_REG); 751 unsigned long flags; 752 u32 value; 753 754 raw_spin_lock_irqsave(&byt_lock, flags); 755 value = readl(reg); 756 757 /* Do not clear direct-irq enabled IRQs (from gpio_disable_free) */ 758 if (value & BYT_DIRECT_IRQ_EN) 759 /* nothing to do */ ; 760 else 761 value &= ~(BYT_TRIG_POS | BYT_TRIG_NEG | BYT_TRIG_LVL); 762 763 writel(value, reg); 764 raw_spin_unlock_irqrestore(&byt_lock, flags); 765 } 766 767 static int byt_gpio_request_enable(struct pinctrl_dev *pctl_dev, 768 struct pinctrl_gpio_range *range, 769 unsigned int offset) 770 { 771 struct intel_pinctrl *vg = pinctrl_dev_get_drvdata(pctl_dev); 772 void __iomem *reg = byt_gpio_reg(vg, offset, BYT_CONF0_REG); 773 u32 value, gpio_mux; 774 unsigned long flags; 775 776 raw_spin_lock_irqsave(&byt_lock, flags); 777 778 /* 779 * In most cases, func pin mux 000 means GPIO function. 780 * But, some pins may have func pin mux 001 represents 781 * GPIO function. 782 * 783 * Because there are devices out there where some pins were not 784 * configured correctly we allow changing the mux value from 785 * request (but print out warning about that). 786 */ 787 value = readl(reg) & BYT_PIN_MUX; 788 gpio_mux = byt_get_gpio_mux(vg, offset); 789 if (gpio_mux != value) { 790 value = readl(reg) & ~BYT_PIN_MUX; 791 value |= gpio_mux; 792 writel(value, reg); 793 794 dev_warn(vg->dev, FW_BUG "pin %u forcibly re-configured as GPIO\n", offset); 795 } 796 797 raw_spin_unlock_irqrestore(&byt_lock, flags); 798 799 pm_runtime_get(vg->dev); 800 801 return 0; 802 } 803 804 static void byt_gpio_disable_free(struct pinctrl_dev *pctl_dev, 805 struct pinctrl_gpio_range *range, 806 unsigned int offset) 807 { 808 struct intel_pinctrl *vg = pinctrl_dev_get_drvdata(pctl_dev); 809 810 byt_gpio_clear_triggering(vg, offset); 811 pm_runtime_put(vg->dev); 812 } 813 814 static void byt_gpio_direct_irq_check(struct intel_pinctrl *vg, 815 unsigned int offset) 816 { 817 void __iomem *conf_reg = byt_gpio_reg(vg, offset, BYT_CONF0_REG); 818 819 /* 820 * Before making any direction modifications, do a check if gpio is set 821 * for direct IRQ. On Bay Trail, setting GPIO to output does not make 822 * sense, so let's at least inform the caller before they shoot 823 * themselves in the foot. 824 */ 825 if (readl(conf_reg) & BYT_DIRECT_IRQ_EN) 826 dev_info_once(vg->dev, "Potential Error: Setting GPIO with direct_irq_en to output"); 827 } 828 829 static int byt_gpio_set_direction(struct pinctrl_dev *pctl_dev, 830 struct pinctrl_gpio_range *range, 831 unsigned int offset, 832 bool input) 833 { 834 struct intel_pinctrl *vg = pinctrl_dev_get_drvdata(pctl_dev); 835 void __iomem *val_reg = byt_gpio_reg(vg, offset, BYT_VAL_REG); 836 unsigned long flags; 837 u32 value; 838 839 raw_spin_lock_irqsave(&byt_lock, flags); 840 841 value = readl(val_reg); 842 value &= ~BYT_DIR_MASK; 843 if (input) 844 value |= BYT_OUTPUT_EN; 845 else 846 byt_gpio_direct_irq_check(vg, offset); 847 848 writel(value, val_reg); 849 850 raw_spin_unlock_irqrestore(&byt_lock, flags); 851 852 return 0; 853 } 854 855 static const struct pinmux_ops byt_pinmux_ops = { 856 .get_functions_count = byt_get_functions_count, 857 .get_function_name = byt_get_function_name, 858 .get_function_groups = byt_get_function_groups, 859 .set_mux = byt_set_mux, 860 .gpio_request_enable = byt_gpio_request_enable, 861 .gpio_disable_free = byt_gpio_disable_free, 862 .gpio_set_direction = byt_gpio_set_direction, 863 }; 864 865 static void byt_get_pull_strength(u32 reg, u16 *strength) 866 { 867 switch (reg & BYT_PULL_STR_MASK) { 868 case BYT_PULL_STR_2K: 869 *strength = 2000; 870 break; 871 case BYT_PULL_STR_10K: 872 *strength = 10000; 873 break; 874 case BYT_PULL_STR_20K: 875 *strength = 20000; 876 break; 877 case BYT_PULL_STR_40K: 878 *strength = 40000; 879 break; 880 } 881 } 882 883 static int byt_set_pull_strength(u32 *reg, u16 strength) 884 { 885 *reg &= ~BYT_PULL_STR_MASK; 886 887 switch (strength) { 888 case 2000: 889 *reg |= BYT_PULL_STR_2K; 890 break; 891 case 10000: 892 *reg |= BYT_PULL_STR_10K; 893 break; 894 case 20000: 895 *reg |= BYT_PULL_STR_20K; 896 break; 897 case 40000: 898 *reg |= BYT_PULL_STR_40K; 899 break; 900 default: 901 return -EINVAL; 902 } 903 904 return 0; 905 } 906 907 static int byt_pin_config_get(struct pinctrl_dev *pctl_dev, unsigned int offset, 908 unsigned long *config) 909 { 910 struct intel_pinctrl *vg = pinctrl_dev_get_drvdata(pctl_dev); 911 enum pin_config_param param = pinconf_to_config_param(*config); 912 void __iomem *conf_reg = byt_gpio_reg(vg, offset, BYT_CONF0_REG); 913 void __iomem *val_reg = byt_gpio_reg(vg, offset, BYT_VAL_REG); 914 void __iomem *db_reg = byt_gpio_reg(vg, offset, BYT_DEBOUNCE_REG); 915 unsigned long flags; 916 u32 conf, pull, val, debounce; 917 u16 arg = 0; 918 919 raw_spin_lock_irqsave(&byt_lock, flags); 920 conf = readl(conf_reg); 921 pull = conf & BYT_PULL_ASSIGN_MASK; 922 val = readl(val_reg); 923 raw_spin_unlock_irqrestore(&byt_lock, flags); 924 925 switch (param) { 926 case PIN_CONFIG_BIAS_DISABLE: 927 if (pull) 928 return -EINVAL; 929 break; 930 case PIN_CONFIG_BIAS_PULL_DOWN: 931 /* Pull assignment is only applicable in input mode */ 932 if ((val & BYT_INPUT_EN) || pull != BYT_PULL_ASSIGN_DOWN) 933 return -EINVAL; 934 935 byt_get_pull_strength(conf, &arg); 936 937 break; 938 case PIN_CONFIG_BIAS_PULL_UP: 939 /* Pull assignment is only applicable in input mode */ 940 if ((val & BYT_INPUT_EN) || pull != BYT_PULL_ASSIGN_UP) 941 return -EINVAL; 942 943 byt_get_pull_strength(conf, &arg); 944 945 break; 946 case PIN_CONFIG_INPUT_DEBOUNCE: 947 if (!(conf & BYT_DEBOUNCE_EN)) 948 return -EINVAL; 949 950 raw_spin_lock_irqsave(&byt_lock, flags); 951 debounce = readl(db_reg); 952 raw_spin_unlock_irqrestore(&byt_lock, flags); 953 954 switch (debounce & BYT_DEBOUNCE_PULSE_MASK) { 955 case BYT_DEBOUNCE_PULSE_375US: 956 arg = 375; 957 break; 958 case BYT_DEBOUNCE_PULSE_750US: 959 arg = 750; 960 break; 961 case BYT_DEBOUNCE_PULSE_1500US: 962 arg = 1500; 963 break; 964 case BYT_DEBOUNCE_PULSE_3MS: 965 arg = 3000; 966 break; 967 case BYT_DEBOUNCE_PULSE_6MS: 968 arg = 6000; 969 break; 970 case BYT_DEBOUNCE_PULSE_12MS: 971 arg = 12000; 972 break; 973 case BYT_DEBOUNCE_PULSE_24MS: 974 arg = 24000; 975 break; 976 default: 977 return -EINVAL; 978 } 979 980 break; 981 default: 982 return -ENOTSUPP; 983 } 984 985 *config = pinconf_to_config_packed(param, arg); 986 987 return 0; 988 } 989 990 static int byt_pin_config_set(struct pinctrl_dev *pctl_dev, 991 unsigned int offset, 992 unsigned long *configs, 993 unsigned int num_configs) 994 { 995 struct intel_pinctrl *vg = pinctrl_dev_get_drvdata(pctl_dev); 996 unsigned int param, arg; 997 void __iomem *conf_reg = byt_gpio_reg(vg, offset, BYT_CONF0_REG); 998 void __iomem *val_reg = byt_gpio_reg(vg, offset, BYT_VAL_REG); 999 void __iomem *db_reg = byt_gpio_reg(vg, offset, BYT_DEBOUNCE_REG); 1000 unsigned long flags; 1001 u32 conf, val, debounce; 1002 int i, ret = 0; 1003 1004 raw_spin_lock_irqsave(&byt_lock, flags); 1005 1006 conf = readl(conf_reg); 1007 val = readl(val_reg); 1008 1009 for (i = 0; i < num_configs; i++) { 1010 param = pinconf_to_config_param(configs[i]); 1011 arg = pinconf_to_config_argument(configs[i]); 1012 1013 switch (param) { 1014 case PIN_CONFIG_BIAS_DISABLE: 1015 conf &= ~BYT_PULL_ASSIGN_MASK; 1016 break; 1017 case PIN_CONFIG_BIAS_PULL_DOWN: 1018 /* Set default strength value in case none is given */ 1019 if (arg == 1) 1020 arg = 2000; 1021 1022 /* 1023 * Pull assignment is only applicable in input mode. If 1024 * chip is not in input mode, set it and warn about it. 1025 */ 1026 if (val & BYT_INPUT_EN) { 1027 val &= ~BYT_INPUT_EN; 1028 writel(val, val_reg); 1029 dev_warn(vg->dev, 1030 "pin %u forcibly set to input mode\n", 1031 offset); 1032 } 1033 1034 conf &= ~BYT_PULL_ASSIGN_MASK; 1035 conf |= BYT_PULL_ASSIGN_DOWN; 1036 ret = byt_set_pull_strength(&conf, arg); 1037 1038 break; 1039 case PIN_CONFIG_BIAS_PULL_UP: 1040 /* Set default strength value in case none is given */ 1041 if (arg == 1) 1042 arg = 2000; 1043 1044 /* 1045 * Pull assignment is only applicable in input mode. If 1046 * chip is not in input mode, set it and warn about it. 1047 */ 1048 if (val & BYT_INPUT_EN) { 1049 val &= ~BYT_INPUT_EN; 1050 writel(val, val_reg); 1051 dev_warn(vg->dev, 1052 "pin %u forcibly set to input mode\n", 1053 offset); 1054 } 1055 1056 conf &= ~BYT_PULL_ASSIGN_MASK; 1057 conf |= BYT_PULL_ASSIGN_UP; 1058 ret = byt_set_pull_strength(&conf, arg); 1059 1060 break; 1061 case PIN_CONFIG_INPUT_DEBOUNCE: 1062 debounce = readl(db_reg); 1063 1064 if (arg) 1065 conf |= BYT_DEBOUNCE_EN; 1066 else 1067 conf &= ~BYT_DEBOUNCE_EN; 1068 1069 switch (arg) { 1070 case 375: 1071 debounce &= ~BYT_DEBOUNCE_PULSE_MASK; 1072 debounce |= BYT_DEBOUNCE_PULSE_375US; 1073 break; 1074 case 750: 1075 debounce &= ~BYT_DEBOUNCE_PULSE_MASK; 1076 debounce |= BYT_DEBOUNCE_PULSE_750US; 1077 break; 1078 case 1500: 1079 debounce &= ~BYT_DEBOUNCE_PULSE_MASK; 1080 debounce |= BYT_DEBOUNCE_PULSE_1500US; 1081 break; 1082 case 3000: 1083 debounce &= ~BYT_DEBOUNCE_PULSE_MASK; 1084 debounce |= BYT_DEBOUNCE_PULSE_3MS; 1085 break; 1086 case 6000: 1087 debounce &= ~BYT_DEBOUNCE_PULSE_MASK; 1088 debounce |= BYT_DEBOUNCE_PULSE_6MS; 1089 break; 1090 case 12000: 1091 debounce &= ~BYT_DEBOUNCE_PULSE_MASK; 1092 debounce |= BYT_DEBOUNCE_PULSE_12MS; 1093 break; 1094 case 24000: 1095 debounce &= ~BYT_DEBOUNCE_PULSE_MASK; 1096 debounce |= BYT_DEBOUNCE_PULSE_24MS; 1097 break; 1098 default: 1099 if (arg) 1100 ret = -EINVAL; 1101 break; 1102 } 1103 1104 if (!ret) 1105 writel(debounce, db_reg); 1106 break; 1107 default: 1108 ret = -ENOTSUPP; 1109 } 1110 1111 if (ret) 1112 break; 1113 } 1114 1115 if (!ret) 1116 writel(conf, conf_reg); 1117 1118 raw_spin_unlock_irqrestore(&byt_lock, flags); 1119 1120 return ret; 1121 } 1122 1123 static const struct pinconf_ops byt_pinconf_ops = { 1124 .is_generic = true, 1125 .pin_config_get = byt_pin_config_get, 1126 .pin_config_set = byt_pin_config_set, 1127 }; 1128 1129 static const struct pinctrl_desc byt_pinctrl_desc = { 1130 .pctlops = &byt_pinctrl_ops, 1131 .pmxops = &byt_pinmux_ops, 1132 .confops = &byt_pinconf_ops, 1133 .owner = THIS_MODULE, 1134 }; 1135 1136 static int byt_gpio_get(struct gpio_chip *chip, unsigned int offset) 1137 { 1138 struct intel_pinctrl *vg = gpiochip_get_data(chip); 1139 void __iomem *reg = byt_gpio_reg(vg, offset, BYT_VAL_REG); 1140 unsigned long flags; 1141 u32 val; 1142 1143 raw_spin_lock_irqsave(&byt_lock, flags); 1144 val = readl(reg); 1145 raw_spin_unlock_irqrestore(&byt_lock, flags); 1146 1147 return !!(val & BYT_LEVEL); 1148 } 1149 1150 static void byt_gpio_set(struct gpio_chip *chip, unsigned int offset, int value) 1151 { 1152 struct intel_pinctrl *vg = gpiochip_get_data(chip); 1153 void __iomem *reg = byt_gpio_reg(vg, offset, BYT_VAL_REG); 1154 unsigned long flags; 1155 u32 old_val; 1156 1157 if (!reg) 1158 return; 1159 1160 raw_spin_lock_irqsave(&byt_lock, flags); 1161 old_val = readl(reg); 1162 if (value) 1163 writel(old_val | BYT_LEVEL, reg); 1164 else 1165 writel(old_val & ~BYT_LEVEL, reg); 1166 raw_spin_unlock_irqrestore(&byt_lock, flags); 1167 } 1168 1169 static int byt_gpio_get_direction(struct gpio_chip *chip, unsigned int offset) 1170 { 1171 struct intel_pinctrl *vg = gpiochip_get_data(chip); 1172 void __iomem *reg = byt_gpio_reg(vg, offset, BYT_VAL_REG); 1173 unsigned long flags; 1174 u32 value; 1175 1176 if (!reg) 1177 return -EINVAL; 1178 1179 raw_spin_lock_irqsave(&byt_lock, flags); 1180 value = readl(reg); 1181 raw_spin_unlock_irqrestore(&byt_lock, flags); 1182 1183 if (!(value & BYT_OUTPUT_EN)) 1184 return GPIO_LINE_DIRECTION_OUT; 1185 if (!(value & BYT_INPUT_EN)) 1186 return GPIO_LINE_DIRECTION_IN; 1187 1188 return -EINVAL; 1189 } 1190 1191 static int byt_gpio_direction_input(struct gpio_chip *chip, unsigned int offset) 1192 { 1193 struct intel_pinctrl *vg = gpiochip_get_data(chip); 1194 void __iomem *val_reg = byt_gpio_reg(vg, offset, BYT_VAL_REG); 1195 unsigned long flags; 1196 u32 reg; 1197 1198 raw_spin_lock_irqsave(&byt_lock, flags); 1199 1200 reg = readl(val_reg); 1201 reg &= ~BYT_DIR_MASK; 1202 reg |= BYT_OUTPUT_EN; 1203 writel(reg, val_reg); 1204 1205 raw_spin_unlock_irqrestore(&byt_lock, flags); 1206 return 0; 1207 } 1208 1209 /* 1210 * Note despite the temptation this MUST NOT be converted into a call to 1211 * pinctrl_gpio_direction_output() + byt_gpio_set() that does not work this 1212 * MUST be done as a single BYT_VAL_REG register write. 1213 * See the commit message of the commit adding this comment for details. 1214 */ 1215 static int byt_gpio_direction_output(struct gpio_chip *chip, 1216 unsigned int offset, int value) 1217 { 1218 struct intel_pinctrl *vg = gpiochip_get_data(chip); 1219 void __iomem *val_reg = byt_gpio_reg(vg, offset, BYT_VAL_REG); 1220 unsigned long flags; 1221 u32 reg; 1222 1223 raw_spin_lock_irqsave(&byt_lock, flags); 1224 1225 byt_gpio_direct_irq_check(vg, offset); 1226 1227 reg = readl(val_reg); 1228 reg &= ~BYT_DIR_MASK; 1229 if (value) 1230 reg |= BYT_LEVEL; 1231 else 1232 reg &= ~BYT_LEVEL; 1233 1234 writel(reg, val_reg); 1235 1236 raw_spin_unlock_irqrestore(&byt_lock, flags); 1237 return 0; 1238 } 1239 1240 static void byt_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip) 1241 { 1242 struct intel_pinctrl *vg = gpiochip_get_data(chip); 1243 int i; 1244 u32 conf0, val; 1245 1246 for (i = 0; i < vg->soc->npins; i++) { 1247 const struct intel_community *comm; 1248 const char *pull_str = NULL; 1249 const char *pull = NULL; 1250 void __iomem *reg; 1251 unsigned long flags; 1252 const char *label; 1253 unsigned int pin; 1254 1255 raw_spin_lock_irqsave(&byt_lock, flags); 1256 pin = vg->soc->pins[i].number; 1257 reg = byt_gpio_reg(vg, pin, BYT_CONF0_REG); 1258 if (!reg) { 1259 seq_printf(s, 1260 "Could not retrieve pin %i conf0 reg\n", 1261 pin); 1262 raw_spin_unlock_irqrestore(&byt_lock, flags); 1263 continue; 1264 } 1265 conf0 = readl(reg); 1266 1267 reg = byt_gpio_reg(vg, pin, BYT_VAL_REG); 1268 if (!reg) { 1269 seq_printf(s, 1270 "Could not retrieve pin %i val reg\n", pin); 1271 raw_spin_unlock_irqrestore(&byt_lock, flags); 1272 continue; 1273 } 1274 val = readl(reg); 1275 raw_spin_unlock_irqrestore(&byt_lock, flags); 1276 1277 comm = byt_get_community(vg, pin); 1278 if (!comm) { 1279 seq_printf(s, 1280 "Could not get community for pin %i\n", pin); 1281 continue; 1282 } 1283 label = gpiochip_is_requested(chip, i); 1284 if (!label) 1285 label = "Unrequested"; 1286 1287 switch (conf0 & BYT_PULL_ASSIGN_MASK) { 1288 case BYT_PULL_ASSIGN_UP: 1289 pull = "up"; 1290 break; 1291 case BYT_PULL_ASSIGN_DOWN: 1292 pull = "down"; 1293 break; 1294 } 1295 1296 switch (conf0 & BYT_PULL_STR_MASK) { 1297 case BYT_PULL_STR_2K: 1298 pull_str = "2k"; 1299 break; 1300 case BYT_PULL_STR_10K: 1301 pull_str = "10k"; 1302 break; 1303 case BYT_PULL_STR_20K: 1304 pull_str = "20k"; 1305 break; 1306 case BYT_PULL_STR_40K: 1307 pull_str = "40k"; 1308 break; 1309 } 1310 1311 seq_printf(s, 1312 " gpio-%-3d (%-20.20s) %s %s %s pad-%-3d offset:0x%03x mux:%d %s%s%s", 1313 pin, 1314 label, 1315 val & BYT_INPUT_EN ? " " : "in", 1316 val & BYT_OUTPUT_EN ? " " : "out", 1317 val & BYT_LEVEL ? "hi" : "lo", 1318 comm->pad_map[i], comm->pad_map[i] * 16, 1319 conf0 & 0x7, 1320 conf0 & BYT_TRIG_NEG ? " fall" : " ", 1321 conf0 & BYT_TRIG_POS ? " rise" : " ", 1322 conf0 & BYT_TRIG_LVL ? " level" : " "); 1323 1324 if (pull && pull_str) 1325 seq_printf(s, " %-4s %-3s", pull, pull_str); 1326 else 1327 seq_puts(s, " "); 1328 1329 if (conf0 & BYT_IODEN) 1330 seq_puts(s, " open-drain"); 1331 1332 seq_puts(s, "\n"); 1333 } 1334 } 1335 1336 static const struct gpio_chip byt_gpio_chip = { 1337 .owner = THIS_MODULE, 1338 .request = gpiochip_generic_request, 1339 .free = gpiochip_generic_free, 1340 .get_direction = byt_gpio_get_direction, 1341 .direction_input = byt_gpio_direction_input, 1342 .direction_output = byt_gpio_direction_output, 1343 .get = byt_gpio_get, 1344 .set = byt_gpio_set, 1345 .set_config = gpiochip_generic_config, 1346 .dbg_show = byt_gpio_dbg_show, 1347 }; 1348 1349 static void byt_irq_ack(struct irq_data *d) 1350 { 1351 struct gpio_chip *gc = irq_data_get_irq_chip_data(d); 1352 struct intel_pinctrl *vg = gpiochip_get_data(gc); 1353 irq_hw_number_t hwirq = irqd_to_hwirq(d); 1354 void __iomem *reg; 1355 1356 reg = byt_gpio_reg(vg, hwirq, BYT_INT_STAT_REG); 1357 if (!reg) 1358 return; 1359 1360 raw_spin_lock(&byt_lock); 1361 writel(BIT(hwirq % 32), reg); 1362 raw_spin_unlock(&byt_lock); 1363 } 1364 1365 static void byt_irq_mask(struct irq_data *d) 1366 { 1367 struct gpio_chip *gc = irq_data_get_irq_chip_data(d); 1368 struct intel_pinctrl *vg = gpiochip_get_data(gc); 1369 irq_hw_number_t hwirq = irqd_to_hwirq(d); 1370 1371 byt_gpio_clear_triggering(vg, hwirq); 1372 gpiochip_disable_irq(gc, hwirq); 1373 } 1374 1375 static void byt_irq_unmask(struct irq_data *d) 1376 { 1377 struct gpio_chip *gc = irq_data_get_irq_chip_data(d); 1378 struct intel_pinctrl *vg = gpiochip_get_data(gc); 1379 irq_hw_number_t hwirq = irqd_to_hwirq(d); 1380 unsigned long flags; 1381 void __iomem *reg; 1382 u32 value; 1383 1384 gpiochip_enable_irq(gc, hwirq); 1385 1386 reg = byt_gpio_reg(vg, hwirq, BYT_CONF0_REG); 1387 if (!reg) 1388 return; 1389 1390 raw_spin_lock_irqsave(&byt_lock, flags); 1391 value = readl(reg); 1392 1393 switch (irqd_get_trigger_type(d)) { 1394 case IRQ_TYPE_LEVEL_HIGH: 1395 value |= BYT_TRIG_LVL; 1396 fallthrough; 1397 case IRQ_TYPE_EDGE_RISING: 1398 value |= BYT_TRIG_POS; 1399 break; 1400 case IRQ_TYPE_LEVEL_LOW: 1401 value |= BYT_TRIG_LVL; 1402 fallthrough; 1403 case IRQ_TYPE_EDGE_FALLING: 1404 value |= BYT_TRIG_NEG; 1405 break; 1406 case IRQ_TYPE_EDGE_BOTH: 1407 value |= (BYT_TRIG_NEG | BYT_TRIG_POS); 1408 break; 1409 } 1410 1411 writel(value, reg); 1412 1413 raw_spin_unlock_irqrestore(&byt_lock, flags); 1414 } 1415 1416 static int byt_irq_type(struct irq_data *d, unsigned int type) 1417 { 1418 struct intel_pinctrl *vg = gpiochip_get_data(irq_data_get_irq_chip_data(d)); 1419 irq_hw_number_t hwirq = irqd_to_hwirq(d); 1420 u32 value; 1421 unsigned long flags; 1422 void __iomem *reg; 1423 1424 reg = byt_gpio_reg(vg, hwirq, BYT_CONF0_REG); 1425 if (!reg) 1426 return -EINVAL; 1427 1428 raw_spin_lock_irqsave(&byt_lock, flags); 1429 value = readl(reg); 1430 1431 WARN(value & BYT_DIRECT_IRQ_EN, 1432 "Bad pad config for io mode, force direct_irq_en bit clearing"); 1433 1434 /* For level trigges the BYT_TRIG_POS and BYT_TRIG_NEG bits 1435 * are used to indicate high and low level triggering 1436 */ 1437 value &= ~(BYT_DIRECT_IRQ_EN | BYT_TRIG_POS | BYT_TRIG_NEG | 1438 BYT_TRIG_LVL); 1439 /* Enable glitch filtering */ 1440 value |= BYT_GLITCH_FILTER_EN | BYT_GLITCH_F_SLOW_CLK | 1441 BYT_GLITCH_F_FAST_CLK; 1442 1443 writel(value, reg); 1444 1445 if (type & IRQ_TYPE_EDGE_BOTH) 1446 irq_set_handler_locked(d, handle_edge_irq); 1447 else if (type & IRQ_TYPE_LEVEL_MASK) 1448 irq_set_handler_locked(d, handle_level_irq); 1449 1450 raw_spin_unlock_irqrestore(&byt_lock, flags); 1451 1452 return 0; 1453 } 1454 1455 static const struct irq_chip byt_gpio_irq_chip = { 1456 .name = "BYT-GPIO", 1457 .irq_ack = byt_irq_ack, 1458 .irq_mask = byt_irq_mask, 1459 .irq_unmask = byt_irq_unmask, 1460 .irq_set_type = byt_irq_type, 1461 .flags = IRQCHIP_SKIP_SET_WAKE | IRQCHIP_SET_TYPE_MASKED | IRQCHIP_IMMUTABLE, 1462 GPIOCHIP_IRQ_RESOURCE_HELPERS, 1463 }; 1464 1465 static void byt_gpio_irq_handler(struct irq_desc *desc) 1466 { 1467 struct irq_data *data = irq_desc_get_irq_data(desc); 1468 struct intel_pinctrl *vg = gpiochip_get_data(irq_desc_get_handler_data(desc)); 1469 struct irq_chip *chip = irq_data_get_irq_chip(data); 1470 u32 base, pin; 1471 void __iomem *reg; 1472 unsigned long pending; 1473 1474 /* check from GPIO controller which pin triggered the interrupt */ 1475 for (base = 0; base < vg->chip.ngpio; base += 32) { 1476 reg = byt_gpio_reg(vg, base, BYT_INT_STAT_REG); 1477 1478 if (!reg) { 1479 dev_warn(vg->dev, 1480 "Pin %i: could not retrieve interrupt status register\n", 1481 base); 1482 continue; 1483 } 1484 1485 raw_spin_lock(&byt_lock); 1486 pending = readl(reg); 1487 raw_spin_unlock(&byt_lock); 1488 for_each_set_bit(pin, &pending, 32) 1489 generic_handle_domain_irq(vg->chip.irq.domain, base + pin); 1490 } 1491 chip->irq_eoi(data); 1492 } 1493 1494 static bool byt_direct_irq_sanity_check(struct intel_pinctrl *vg, int pin, u32 conf0) 1495 { 1496 int direct_irq, ioapic_direct_irq_base; 1497 u8 *match, direct_irq_mux[16]; 1498 u32 trig; 1499 1500 memcpy_fromio(direct_irq_mux, vg->communities->pad_regs + BYT_DIRECT_IRQ_REG, 1501 sizeof(direct_irq_mux)); 1502 match = memchr(direct_irq_mux, pin, sizeof(direct_irq_mux)); 1503 if (!match) { 1504 dev_warn(vg->dev, FW_BUG "pin %i: direct_irq_en set but no IRQ assigned, clearing\n", pin); 1505 return false; 1506 } 1507 1508 direct_irq = match - direct_irq_mux; 1509 /* Base IO-APIC pin numbers come from atom-e3800-family-datasheet.pdf */ 1510 ioapic_direct_irq_base = (vg->communities->npins == BYT_NGPIO_SCORE) ? 51 : 67; 1511 dev_dbg(vg->dev, "Pin %i: uses direct IRQ %d (IO-APIC %d)\n", pin, 1512 direct_irq, direct_irq + ioapic_direct_irq_base); 1513 1514 /* 1515 * Testing has shown that the way direct IRQs work is that the combination of the 1516 * direct-irq-en flag and the direct IRQ mux connect the output of the GPIO's IRQ 1517 * trigger block, which normally sets the status flag in the IRQ status reg at 1518 * 0x800, to one of the IO-APIC pins according to the mux registers. 1519 * 1520 * This means that: 1521 * 1. The TRIG_MASK bits must be set to configure the GPIO's IRQ trigger block 1522 * 2. The TRIG_LVL bit *must* be set, so that the GPIO's input value is directly 1523 * passed (1:1 or inverted) to the IO-APIC pin, if TRIG_LVL is not set, 1524 * selecting edge mode operation then on the first edge the IO-APIC pin goes 1525 * high, but since no write-to-clear write will be done to the IRQ status reg 1526 * at 0x800, the detected edge condition will never get cleared. 1527 */ 1528 trig = conf0 & BYT_TRIG_MASK; 1529 if (trig != (BYT_TRIG_POS | BYT_TRIG_LVL) && 1530 trig != (BYT_TRIG_NEG | BYT_TRIG_LVL)) { 1531 dev_warn(vg->dev, FW_BUG "pin %i: direct_irq_en set without trigger (conf0: %xh), clearing\n", 1532 pin, conf0); 1533 return false; 1534 } 1535 1536 return true; 1537 } 1538 1539 static void byt_init_irq_valid_mask(struct gpio_chip *chip, 1540 unsigned long *valid_mask, 1541 unsigned int ngpios) 1542 { 1543 struct intel_pinctrl *vg = gpiochip_get_data(chip); 1544 void __iomem *reg; 1545 u32 value; 1546 int i; 1547 1548 /* 1549 * Clear interrupt triggers for all pins that are GPIOs and 1550 * do not use direct IRQ mode. This will prevent spurious 1551 * interrupts from misconfigured pins. 1552 */ 1553 for (i = 0; i < vg->soc->npins; i++) { 1554 unsigned int pin = vg->soc->pins[i].number; 1555 1556 reg = byt_gpio_reg(vg, pin, BYT_CONF0_REG); 1557 if (!reg) { 1558 dev_warn(vg->dev, 1559 "Pin %i: could not retrieve conf0 register\n", 1560 i); 1561 continue; 1562 } 1563 1564 value = readl(reg); 1565 if (value & BYT_DIRECT_IRQ_EN) { 1566 if (byt_direct_irq_sanity_check(vg, i, value)) { 1567 clear_bit(i, valid_mask); 1568 } else { 1569 value &= ~(BYT_DIRECT_IRQ_EN | BYT_TRIG_POS | 1570 BYT_TRIG_NEG | BYT_TRIG_LVL); 1571 writel(value, reg); 1572 } 1573 } else if ((value & BYT_PIN_MUX) == byt_get_gpio_mux(vg, i)) { 1574 byt_gpio_clear_triggering(vg, i); 1575 dev_dbg(vg->dev, "disabling GPIO %d\n", i); 1576 } 1577 } 1578 } 1579 1580 static int byt_gpio_irq_init_hw(struct gpio_chip *chip) 1581 { 1582 struct intel_pinctrl *vg = gpiochip_get_data(chip); 1583 void __iomem *reg; 1584 u32 base, value; 1585 1586 /* clear interrupt status trigger registers */ 1587 for (base = 0; base < vg->soc->npins; base += 32) { 1588 reg = byt_gpio_reg(vg, base, BYT_INT_STAT_REG); 1589 1590 if (!reg) { 1591 dev_warn(vg->dev, 1592 "Pin %i: could not retrieve irq status reg\n", 1593 base); 1594 continue; 1595 } 1596 1597 writel(0xffffffff, reg); 1598 /* make sure trigger bits are cleared, if not then a pin 1599 might be misconfigured in bios */ 1600 value = readl(reg); 1601 if (value) 1602 dev_err(vg->dev, 1603 "GPIO interrupt error, pins misconfigured. INT_STAT%u: 0x%08x\n", 1604 base / 32, value); 1605 } 1606 1607 return 0; 1608 } 1609 1610 static int byt_gpio_add_pin_ranges(struct gpio_chip *chip) 1611 { 1612 struct intel_pinctrl *vg = gpiochip_get_data(chip); 1613 struct device *dev = vg->dev; 1614 int ret; 1615 1616 ret = gpiochip_add_pin_range(chip, dev_name(dev), 0, 0, vg->soc->npins); 1617 if (ret) 1618 dev_err(dev, "failed to add GPIO pin range\n"); 1619 1620 return ret; 1621 } 1622 1623 static int byt_gpio_probe(struct intel_pinctrl *vg) 1624 { 1625 struct platform_device *pdev = to_platform_device(vg->dev); 1626 struct gpio_chip *gc; 1627 int irq, ret; 1628 1629 /* Set up gpio chip */ 1630 vg->chip = byt_gpio_chip; 1631 gc = &vg->chip; 1632 gc->label = dev_name(vg->dev); 1633 gc->base = -1; 1634 gc->can_sleep = false; 1635 gc->add_pin_ranges = byt_gpio_add_pin_ranges; 1636 gc->parent = vg->dev; 1637 gc->ngpio = vg->soc->npins; 1638 1639 #ifdef CONFIG_PM_SLEEP 1640 vg->context.pads = devm_kcalloc(vg->dev, gc->ngpio, sizeof(*vg->context.pads), 1641 GFP_KERNEL); 1642 if (!vg->context.pads) 1643 return -ENOMEM; 1644 #endif 1645 1646 /* set up interrupts */ 1647 irq = platform_get_irq_optional(pdev, 0); 1648 if (irq > 0) { 1649 struct gpio_irq_chip *girq; 1650 1651 girq = &gc->irq; 1652 gpio_irq_chip_set_chip(girq, &byt_gpio_irq_chip); 1653 girq->init_hw = byt_gpio_irq_init_hw; 1654 girq->init_valid_mask = byt_init_irq_valid_mask; 1655 girq->parent_handler = byt_gpio_irq_handler; 1656 girq->num_parents = 1; 1657 girq->parents = devm_kcalloc(vg->dev, girq->num_parents, 1658 sizeof(*girq->parents), GFP_KERNEL); 1659 if (!girq->parents) 1660 return -ENOMEM; 1661 girq->parents[0] = irq; 1662 girq->default_type = IRQ_TYPE_NONE; 1663 girq->handler = handle_bad_irq; 1664 } 1665 1666 ret = devm_gpiochip_add_data(vg->dev, gc, vg); 1667 if (ret) { 1668 dev_err(vg->dev, "failed adding byt-gpio chip\n"); 1669 return ret; 1670 } 1671 1672 return ret; 1673 } 1674 1675 static int byt_set_soc_data(struct intel_pinctrl *vg, 1676 const struct intel_pinctrl_soc_data *soc) 1677 { 1678 struct platform_device *pdev = to_platform_device(vg->dev); 1679 int i; 1680 1681 vg->soc = soc; 1682 1683 vg->ncommunities = vg->soc->ncommunities; 1684 vg->communities = devm_kcalloc(vg->dev, vg->ncommunities, 1685 sizeof(*vg->communities), GFP_KERNEL); 1686 if (!vg->communities) 1687 return -ENOMEM; 1688 1689 for (i = 0; i < vg->soc->ncommunities; i++) { 1690 struct intel_community *comm = vg->communities + i; 1691 1692 *comm = vg->soc->communities[i]; 1693 1694 comm->pad_regs = devm_platform_ioremap_resource(pdev, 0); 1695 if (IS_ERR(comm->pad_regs)) 1696 return PTR_ERR(comm->pad_regs); 1697 } 1698 1699 return 0; 1700 } 1701 1702 static const struct acpi_device_id byt_gpio_acpi_match[] = { 1703 { "INT33B2", (kernel_ulong_t)byt_soc_data }, 1704 { "INT33FC", (kernel_ulong_t)byt_soc_data }, 1705 { } 1706 }; 1707 1708 static int byt_pinctrl_probe(struct platform_device *pdev) 1709 { 1710 const struct intel_pinctrl_soc_data *soc_data; 1711 struct device *dev = &pdev->dev; 1712 struct intel_pinctrl *vg; 1713 int ret; 1714 1715 soc_data = intel_pinctrl_get_soc_data(pdev); 1716 if (IS_ERR(soc_data)) 1717 return PTR_ERR(soc_data); 1718 1719 vg = devm_kzalloc(dev, sizeof(*vg), GFP_KERNEL); 1720 if (!vg) 1721 return -ENOMEM; 1722 1723 vg->dev = dev; 1724 ret = byt_set_soc_data(vg, soc_data); 1725 if (ret) { 1726 dev_err(dev, "failed to set soc data\n"); 1727 return ret; 1728 } 1729 1730 vg->pctldesc = byt_pinctrl_desc; 1731 vg->pctldesc.name = dev_name(dev); 1732 vg->pctldesc.pins = vg->soc->pins; 1733 vg->pctldesc.npins = vg->soc->npins; 1734 1735 vg->pctldev = devm_pinctrl_register(dev, &vg->pctldesc, vg); 1736 if (IS_ERR(vg->pctldev)) { 1737 dev_err(dev, "failed to register pinctrl driver\n"); 1738 return PTR_ERR(vg->pctldev); 1739 } 1740 1741 ret = byt_gpio_probe(vg); 1742 if (ret) 1743 return ret; 1744 1745 platform_set_drvdata(pdev, vg); 1746 pm_runtime_enable(dev); 1747 1748 return 0; 1749 } 1750 1751 #ifdef CONFIG_PM_SLEEP 1752 static int byt_gpio_suspend(struct device *dev) 1753 { 1754 struct intel_pinctrl *vg = dev_get_drvdata(dev); 1755 unsigned long flags; 1756 int i; 1757 1758 raw_spin_lock_irqsave(&byt_lock, flags); 1759 1760 for (i = 0; i < vg->soc->npins; i++) { 1761 void __iomem *reg; 1762 u32 value; 1763 unsigned int pin = vg->soc->pins[i].number; 1764 1765 reg = byt_gpio_reg(vg, pin, BYT_CONF0_REG); 1766 if (!reg) { 1767 dev_warn(vg->dev, 1768 "Pin %i: could not retrieve conf0 register\n", 1769 i); 1770 continue; 1771 } 1772 value = readl(reg) & BYT_CONF0_RESTORE_MASK; 1773 vg->context.pads[i].conf0 = value; 1774 1775 reg = byt_gpio_reg(vg, pin, BYT_VAL_REG); 1776 value = readl(reg) & BYT_VAL_RESTORE_MASK; 1777 vg->context.pads[i].val = value; 1778 } 1779 1780 raw_spin_unlock_irqrestore(&byt_lock, flags); 1781 return 0; 1782 } 1783 1784 static int byt_gpio_resume(struct device *dev) 1785 { 1786 struct intel_pinctrl *vg = dev_get_drvdata(dev); 1787 unsigned long flags; 1788 int i; 1789 1790 raw_spin_lock_irqsave(&byt_lock, flags); 1791 1792 for (i = 0; i < vg->soc->npins; i++) { 1793 void __iomem *reg; 1794 u32 value; 1795 unsigned int pin = vg->soc->pins[i].number; 1796 1797 reg = byt_gpio_reg(vg, pin, BYT_CONF0_REG); 1798 if (!reg) { 1799 dev_warn(vg->dev, 1800 "Pin %i: could not retrieve conf0 register\n", 1801 i); 1802 continue; 1803 } 1804 value = readl(reg); 1805 if ((value & BYT_CONF0_RESTORE_MASK) != 1806 vg->context.pads[i].conf0) { 1807 value &= ~BYT_CONF0_RESTORE_MASK; 1808 value |= vg->context.pads[i].conf0; 1809 writel(value, reg); 1810 dev_info(dev, "restored pin %d conf0 %#08x", i, value); 1811 } 1812 1813 reg = byt_gpio_reg(vg, pin, BYT_VAL_REG); 1814 value = readl(reg); 1815 if ((value & BYT_VAL_RESTORE_MASK) != 1816 vg->context.pads[i].val) { 1817 u32 v; 1818 1819 v = value & ~BYT_VAL_RESTORE_MASK; 1820 v |= vg->context.pads[i].val; 1821 if (v != value) { 1822 writel(v, reg); 1823 dev_dbg(dev, "restored pin %d val %#08x\n", 1824 i, v); 1825 } 1826 } 1827 } 1828 1829 raw_spin_unlock_irqrestore(&byt_lock, flags); 1830 return 0; 1831 } 1832 #endif 1833 1834 #ifdef CONFIG_PM 1835 static int byt_gpio_runtime_suspend(struct device *dev) 1836 { 1837 return 0; 1838 } 1839 1840 static int byt_gpio_runtime_resume(struct device *dev) 1841 { 1842 return 0; 1843 } 1844 #endif 1845 1846 static const struct dev_pm_ops byt_gpio_pm_ops = { 1847 SET_LATE_SYSTEM_SLEEP_PM_OPS(byt_gpio_suspend, byt_gpio_resume) 1848 SET_RUNTIME_PM_OPS(byt_gpio_runtime_suspend, byt_gpio_runtime_resume, 1849 NULL) 1850 }; 1851 1852 static struct platform_driver byt_gpio_driver = { 1853 .probe = byt_pinctrl_probe, 1854 .driver = { 1855 .name = "byt_gpio", 1856 .pm = &byt_gpio_pm_ops, 1857 .acpi_match_table = byt_gpio_acpi_match, 1858 .suppress_bind_attrs = true, 1859 }, 1860 }; 1861 1862 static int __init byt_gpio_init(void) 1863 { 1864 return platform_driver_register(&byt_gpio_driver); 1865 } 1866 subsys_initcall(byt_gpio_init); 1867