drivers/pinctrl/intel/pinctrl-merrifield.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Intel Merrifield SoC pinctrl driver
   4  *
   5  * Copyright (C) 2016, Intel Corporation
   6  * Author: Andy Shevchenko <[email protected]>
   7  */
   8
   9 #include <linux/bits.h>
  10 #include <linux/err.h>
  11 #include <linux/io.h>
  12 #include <linux/module.h>
  13 #include <linux/mod_devicetable.h>
  14 #include <linux/platform_device.h>
  15 #include <linux/seq_file.h>
  16
  17 #include <linux/pinctrl/pinconf-generic.h>
  18 #include <linux/pinctrl/pinconf.h>
  19 #include <linux/pinctrl/pinctrl.h>
  20 #include <linux/pinctrl/pinmux.h>
  21
  22 #include "pinctrl-intel.h"
  23
  24 #define MRFLD_FAMILY_NR                 64
  25 #define MRFLD_FAMILY_LEN                0x400
  26
  27 #define SLEW_OFFSET                     0x000
  28 #define BUFCFG_OFFSET                   0x100
  29 #define MISC_OFFSET                     0x300
  30
  31 #define BUFCFG_PINMODE_SHIFT            0
  32 #define BUFCFG_PINMODE_MASK             GENMASK(2, 0)
  33 #define BUFCFG_PINMODE_GPIO             0
  34 #define BUFCFG_PUPD_VAL_SHIFT           4
  35 #define BUFCFG_PUPD_VAL_MASK            GENMASK(5, 4)
  36 #define BUFCFG_PUPD_VAL_2K              0
  37 #define BUFCFG_PUPD_VAL_20K             1
  38 #define BUFCFG_PUPD_VAL_50K             2
  39 #define BUFCFG_PUPD_VAL_910             3
  40 #define BUFCFG_PU_EN                    BIT(8)
  41 #define BUFCFG_PD_EN                    BIT(9)
  42 #define BUFCFG_Px_EN_MASK               GENMASK(9, 8)
  43 #define BUFCFG_SLEWSEL                  BIT(10)
  44 #define BUFCFG_OVINEN                   BIT(12)
  45 #define BUFCFG_OVINEN_EN                BIT(13)
  46 #define BUFCFG_OVINEN_MASK              GENMASK(13, 12)
  47 #define BUFCFG_OVOUTEN                  BIT(14)
  48 #define BUFCFG_OVOUTEN_EN               BIT(15)
  49 #define BUFCFG_OVOUTEN_MASK             GENMASK(15, 14)
  50 #define BUFCFG_INDATAOV_VAL             BIT(16)
  51 #define BUFCFG_INDATAOV_EN              BIT(17)
  52 #define BUFCFG_INDATAOV_MASK            GENMASK(17, 16)
  53 #define BUFCFG_OUTDATAOV_VAL            BIT(18)
  54 #define BUFCFG_OUTDATAOV_EN             BIT(19)
  55 #define BUFCFG_OUTDATAOV_MASK           GENMASK(19, 18)
  56 #define BUFCFG_OD_EN                    BIT(21)
  57
  58 /**
  59  * struct mrfld_family - Intel pin family description
  60  * @barno: MMIO BAR number where registers for this family reside
  61  * @pin_base: Starting pin of pins in this family
  62  * @npins: Number of pins in this family
  63  * @protected: True if family is protected by access
  64  * @regs: family specific common registers
  65  */
  66 struct mrfld_family {
  67         unsigned int barno;
  68         unsigned int pin_base;
  69         size_t npins;
  70         bool protected;
  71         void __iomem *regs;
  72 };
  73
  74 #define MRFLD_FAMILY(b, s, e)                           \
  75         {                                               \
  76                 .barno = (b),                           \
  77                 .pin_base = (s),                        \
  78                 .npins = (e) - (s) + 1,                 \
  79         }
  80
  81 #define MRFLD_FAMILY_PROTECTED(b, s, e)                 \
  82         {                                               \
  83                 .barno = (b),                           \
  84                 .pin_base = (s),                        \
  85                 .npins = (e) - (s) + 1,                 \
  86                 .protected = true,                      \
  87         }
  88
  89 static const struct pinctrl_pin_desc mrfld_pins[] = {
  90         /* Family 0: OCP2SSC (0 pins) */
  91         /* Family 1: ULPI (13 pins) */
  92         PINCTRL_PIN(0, "ULPI_CLK"),
  93         PINCTRL_PIN(1, "ULPI_D0"),
  94         PINCTRL_PIN(2, "ULPI_D1"),
  95         PINCTRL_PIN(3, "ULPI_D2"),
  96         PINCTRL_PIN(4, "ULPI_D3"),
  97         PINCTRL_PIN(5, "ULPI_D4"),
  98         PINCTRL_PIN(6, "ULPI_D5"),
  99         PINCTRL_PIN(7, "ULPI_D6"),
 100         PINCTRL_PIN(8, "ULPI_D7"),
 101         PINCTRL_PIN(9, "ULPI_DIR"),
 102         PINCTRL_PIN(10, "ULPI_NXT"),
 103         PINCTRL_PIN(11, "ULPI_REFCLK"),
 104         PINCTRL_PIN(12, "ULPI_STP"),
 105         /* Family 2: eMMC (24 pins) */
 106         PINCTRL_PIN(13, "EMMC_CLK"),
 107         PINCTRL_PIN(14, "EMMC_CMD"),
 108         PINCTRL_PIN(15, "EMMC_D0"),
 109         PINCTRL_PIN(16, "EMMC_D1"),
 110         PINCTRL_PIN(17, "EMMC_D2"),
 111         PINCTRL_PIN(18, "EMMC_D3"),
 112         PINCTRL_PIN(19, "EMMC_D4"),
 113         PINCTRL_PIN(20, "EMMC_D5"),
 114         PINCTRL_PIN(21, "EMMC_D6"),
 115         PINCTRL_PIN(22, "EMMC_D7"),
 116         PINCTRL_PIN(23, "EMMC_RST_N"),
 117         PINCTRL_PIN(24, "GP154"),
 118         PINCTRL_PIN(25, "GP155"),
 119         PINCTRL_PIN(26, "GP156"),
 120         PINCTRL_PIN(27, "GP157"),
 121         PINCTRL_PIN(28, "GP158"),
 122         PINCTRL_PIN(29, "GP159"),
 123         PINCTRL_PIN(30, "GP160"),
 124         PINCTRL_PIN(31, "GP161"),
 125         PINCTRL_PIN(32, "GP162"),
 126         PINCTRL_PIN(33, "GP163"),
 127         PINCTRL_PIN(34, "GP97"),
 128         PINCTRL_PIN(35, "GP14"),
 129         PINCTRL_PIN(36, "GP15"),
 130         /* Family 3: SDIO (20 pins) */
 131         PINCTRL_PIN(37, "GP77_SD_CD"),
 132         PINCTRL_PIN(38, "GP78_SD_CLK"),
 133         PINCTRL_PIN(39, "GP79_SD_CMD"),
 134         PINCTRL_PIN(40, "GP80_SD_D0"),
 135         PINCTRL_PIN(41, "GP81_SD_D1"),
 136         PINCTRL_PIN(42, "GP82_SD_D2"),
 137         PINCTRL_PIN(43, "GP83_SD_D3"),
 138         PINCTRL_PIN(44, "GP84_SD_LS_CLK_FB"),
 139         PINCTRL_PIN(45, "GP85_SD_LS_CMD_DIR"),
 140         PINCTRL_PIN(46, "GP86_SD_LS_D_DIR"),
 141         PINCTRL_PIN(47, "GP88_SD_LS_SEL"),
 142         PINCTRL_PIN(48, "GP87_SD_PD"),
 143         PINCTRL_PIN(49, "GP89_SD_WP"),
 144         PINCTRL_PIN(50, "GP90_SDIO_CLK"),
 145         PINCTRL_PIN(51, "GP91_SDIO_CMD"),
 146         PINCTRL_PIN(52, "GP92_SDIO_D0"),
 147         PINCTRL_PIN(53, "GP93_SDIO_D1"),
 148         PINCTRL_PIN(54, "GP94_SDIO_D2"),
 149         PINCTRL_PIN(55, "GP95_SDIO_D3"),
 150         PINCTRL_PIN(56, "GP96_SDIO_PD"),
 151         /* Family 4: HSI (8 pins) */
 152         PINCTRL_PIN(57, "HSI_ACDATA"),
 153         PINCTRL_PIN(58, "HSI_ACFLAG"),
 154         PINCTRL_PIN(59, "HSI_ACREADY"),
 155         PINCTRL_PIN(60, "HSI_ACWAKE"),
 156         PINCTRL_PIN(61, "HSI_CADATA"),
 157         PINCTRL_PIN(62, "HSI_CAFLAG"),
 158         PINCTRL_PIN(63, "HSI_CAREADY"),
 159         PINCTRL_PIN(64, "HSI_CAWAKE"),
 160         /* Family 5: SSP Audio (14 pins) */
 161         PINCTRL_PIN(65, "GP70"),
 162         PINCTRL_PIN(66, "GP71"),
 163         PINCTRL_PIN(67, "GP32_I2S_0_CLK"),
 164         PINCTRL_PIN(68, "GP33_I2S_0_FS"),
 165         PINCTRL_PIN(69, "GP34_I2S_0_RXD"),
 166         PINCTRL_PIN(70, "GP35_I2S_0_TXD"),
 167         PINCTRL_PIN(71, "GP36_I2S_1_CLK"),
 168         PINCTRL_PIN(72, "GP37_I2S_1_FS"),
 169         PINCTRL_PIN(73, "GP38_I2S_1_RXD"),
 170         PINCTRL_PIN(74, "GP39_I2S_1_TXD"),
 171         PINCTRL_PIN(75, "GP40_I2S_2_CLK"),
 172         PINCTRL_PIN(76, "GP41_I2S_2_FS"),
 173         PINCTRL_PIN(77, "GP42_I2S_2_RXD"),
 174         PINCTRL_PIN(78, "GP43_I2S_2_TXD"),
 175         /* Family 6: GP SSP (22 pins) */
 176         PINCTRL_PIN(79, "GP120_SPI_0_CLK"),
 177         PINCTRL_PIN(80, "GP121_SPI_0_SS"),
 178         PINCTRL_PIN(81, "GP122_SPI_0_RXD"),
 179         PINCTRL_PIN(82, "GP123_SPI_0_TXD"),
 180         PINCTRL_PIN(83, "GP102_SPI_1_CLK"),
 181         PINCTRL_PIN(84, "GP103_SPI_1_SS0"),
 182         PINCTRL_PIN(85, "GP104_SPI_1_SS1"),
 183         PINCTRL_PIN(86, "GP105_SPI_1_SS2"),
 184         PINCTRL_PIN(87, "GP106_SPI_1_SS3"),
 185         PINCTRL_PIN(88, "GP107_SPI_1_RXD"),
 186         PINCTRL_PIN(89, "GP108_SPI_1_TXD"),
 187         PINCTRL_PIN(90, "GP109_SPI_2_CLK"),
 188         PINCTRL_PIN(91, "GP110_SPI_2_SS0"),
 189         PINCTRL_PIN(92, "GP111_SPI_2_SS1"),
 190         PINCTRL_PIN(93, "GP112_SPI_2_SS2"),
 191         PINCTRL_PIN(94, "GP113_SPI_2_SS3"),
 192         PINCTRL_PIN(95, "GP114_SPI_2_RXD"),
 193         PINCTRL_PIN(96, "GP115_SPI_2_TXD"),
 194         PINCTRL_PIN(97, "GP116_SPI_3_CLK"),
 195         PINCTRL_PIN(98, "GP117_SPI_3_SS"),
 196         PINCTRL_PIN(99, "GP118_SPI_3_RXD"),
 197         PINCTRL_PIN(100, "GP119_SPI_3_TXD"),
 198         /* Family 7: I2C (14 pins) */
 199         PINCTRL_PIN(101, "GP19_I2C_1_SCL"),
 200         PINCTRL_PIN(102, "GP20_I2C_1_SDA"),
 201         PINCTRL_PIN(103, "GP21_I2C_2_SCL"),
 202         PINCTRL_PIN(104, "GP22_I2C_2_SDA"),
 203         PINCTRL_PIN(105, "GP17_I2C_3_SCL_HDMI"),
 204         PINCTRL_PIN(106, "GP18_I2C_3_SDA_HDMI"),
 205         PINCTRL_PIN(107, "GP23_I2C_4_SCL"),
 206         PINCTRL_PIN(108, "GP24_I2C_4_SDA"),
 207         PINCTRL_PIN(109, "GP25_I2C_5_SCL"),
 208         PINCTRL_PIN(110, "GP26_I2C_5_SDA"),
 209         PINCTRL_PIN(111, "GP27_I2C_6_SCL"),
 210         PINCTRL_PIN(112, "GP28_I2C_6_SDA"),
 211         PINCTRL_PIN(113, "GP29_I2C_7_SCL"),
 212         PINCTRL_PIN(114, "GP30_I2C_7_SDA"),
 213         /* Family 8: UART (12 pins) */
 214         PINCTRL_PIN(115, "GP124_UART_0_CTS"),
 215         PINCTRL_PIN(116, "GP125_UART_0_RTS"),
 216         PINCTRL_PIN(117, "GP126_UART_0_RX"),
 217         PINCTRL_PIN(118, "GP127_UART_0_TX"),
 218         PINCTRL_PIN(119, "GP128_UART_1_CTS"),
 219         PINCTRL_PIN(120, "GP129_UART_1_RTS"),
 220         PINCTRL_PIN(121, "GP130_UART_1_RX"),
 221         PINCTRL_PIN(122, "GP131_UART_1_TX"),
 222         PINCTRL_PIN(123, "GP132_UART_2_CTS"),
 223         PINCTRL_PIN(124, "GP133_UART_2_RTS"),
 224         PINCTRL_PIN(125, "GP134_UART_2_RX"),
 225         PINCTRL_PIN(126, "GP135_UART_2_TX"),
 226         /* Family 9: GPIO South (19 pins) */
 227         PINCTRL_PIN(127, "GP177"),
 228         PINCTRL_PIN(128, "GP178"),
 229         PINCTRL_PIN(129, "GP179"),
 230         PINCTRL_PIN(130, "GP180"),
 231         PINCTRL_PIN(131, "GP181"),
 232         PINCTRL_PIN(132, "GP182_PWM2"),
 233         PINCTRL_PIN(133, "GP183_PWM3"),
 234         PINCTRL_PIN(134, "GP184"),
 235         PINCTRL_PIN(135, "GP185"),
 236         PINCTRL_PIN(136, "GP186"),
 237         PINCTRL_PIN(137, "GP187"),
 238         PINCTRL_PIN(138, "GP188"),
 239         PINCTRL_PIN(139, "GP189"),
 240         PINCTRL_PIN(140, "GP64_FAST_INT0"),
 241         PINCTRL_PIN(141, "GP65_FAST_INT1"),
 242         PINCTRL_PIN(142, "GP66_FAST_INT2"),
 243         PINCTRL_PIN(143, "GP67_FAST_INT3"),
 244         PINCTRL_PIN(144, "GP12_PWM0"),
 245         PINCTRL_PIN(145, "GP13_PWM1"),
 246         /* Family 10: Camera Sideband (12 pins) */
 247         PINCTRL_PIN(146, "GP0"),
 248         PINCTRL_PIN(147, "GP1"),
 249         PINCTRL_PIN(148, "GP2"),
 250         PINCTRL_PIN(149, "GP3"),
 251         PINCTRL_PIN(150, "GP4"),
 252         PINCTRL_PIN(151, "GP5"),
 253         PINCTRL_PIN(152, "GP6"),
 254         PINCTRL_PIN(153, "GP7"),
 255         PINCTRL_PIN(154, "GP8"),
 256         PINCTRL_PIN(155, "GP9"),
 257         PINCTRL_PIN(156, "GP10"),
 258         PINCTRL_PIN(157, "GP11"),
 259         /* Family 11: Clock (22 pins) */
 260         PINCTRL_PIN(158, "GP137"),
 261         PINCTRL_PIN(159, "GP138"),
 262         PINCTRL_PIN(160, "GP139"),
 263         PINCTRL_PIN(161, "GP140"),
 264         PINCTRL_PIN(162, "GP141"),
 265         PINCTRL_PIN(163, "GP142"),
 266         PINCTRL_PIN(164, "GP16_HDMI_HPD"),
 267         PINCTRL_PIN(165, "GP68_DSI_A_TE"),
 268         PINCTRL_PIN(166, "GP69_DSI_C_TE"),
 269         PINCTRL_PIN(167, "OSC_CLK_CTRL0"),
 270         PINCTRL_PIN(168, "OSC_CLK_CTRL1"),
 271         PINCTRL_PIN(169, "OSC_CLK0"),
 272         PINCTRL_PIN(170, "OSC_CLK1"),
 273         PINCTRL_PIN(171, "OSC_CLK2"),
 274         PINCTRL_PIN(172, "OSC_CLK3"),
 275         PINCTRL_PIN(173, "OSC_CLK4"),
 276         PINCTRL_PIN(174, "RESETOUT"),
 277         PINCTRL_PIN(175, "PMODE"),
 278         PINCTRL_PIN(176, "PRDY"),
 279         PINCTRL_PIN(177, "PREQ"),
 280         PINCTRL_PIN(178, "GP190"),
 281         PINCTRL_PIN(179, "GP191"),
 282         /* Family 12: MSIC (15 pins) */
 283         PINCTRL_PIN(180, "I2C_0_SCL"),
 284         PINCTRL_PIN(181, "I2C_0_SDA"),
 285         PINCTRL_PIN(182, "IERR"),
 286         PINCTRL_PIN(183, "JTAG_TCK"),
 287         PINCTRL_PIN(184, "JTAG_TDI"),
 288         PINCTRL_PIN(185, "JTAG_TDO"),
 289         PINCTRL_PIN(186, "JTAG_TMS"),
 290         PINCTRL_PIN(187, "JTAG_TRST"),
 291         PINCTRL_PIN(188, "PROCHOT"),
 292         PINCTRL_PIN(189, "RTC_CLK"),
 293         PINCTRL_PIN(190, "SVID_ALERT"),
 294         PINCTRL_PIN(191, "SVID_CLK"),
 295         PINCTRL_PIN(192, "SVID_D"),
 296         PINCTRL_PIN(193, "THERMTRIP"),
 297         PINCTRL_PIN(194, "STANDBY"),
 298         /* Family 13: Keyboard (20 pins) */
 299         PINCTRL_PIN(195, "GP44"),
 300         PINCTRL_PIN(196, "GP45"),
 301         PINCTRL_PIN(197, "GP46"),
 302         PINCTRL_PIN(198, "GP47"),
 303         PINCTRL_PIN(199, "GP48"),
 304         PINCTRL_PIN(200, "GP49"),
 305         PINCTRL_PIN(201, "GP50"),
 306         PINCTRL_PIN(202, "GP51"),
 307         PINCTRL_PIN(203, "GP52"),
 308         PINCTRL_PIN(204, "GP53"),
 309         PINCTRL_PIN(205, "GP54"),
 310         PINCTRL_PIN(206, "GP55"),
 311         PINCTRL_PIN(207, "GP56"),
 312         PINCTRL_PIN(208, "GP57"),
 313         PINCTRL_PIN(209, "GP58"),
 314         PINCTRL_PIN(210, "GP59"),
 315         PINCTRL_PIN(211, "GP60"),
 316         PINCTRL_PIN(212, "GP61"),
 317         PINCTRL_PIN(213, "GP62"),
 318         PINCTRL_PIN(214, "GP63"),
 319         /* Family 14: GPIO North (13 pins) */
 320         PINCTRL_PIN(215, "GP164"),
 321         PINCTRL_PIN(216, "GP165"),
 322         PINCTRL_PIN(217, "GP166"),
 323         PINCTRL_PIN(218, "GP167"),
 324         PINCTRL_PIN(219, "GP168_MJTAG_TCK"),
 325         PINCTRL_PIN(220, "GP169_MJTAG_TDI"),
 326         PINCTRL_PIN(221, "GP170_MJTAG_TDO"),
 327         PINCTRL_PIN(222, "GP171_MJTAG_TMS"),
 328         PINCTRL_PIN(223, "GP172_MJTAG_TRST"),
 329         PINCTRL_PIN(224, "GP173"),
 330         PINCTRL_PIN(225, "GP174"),
 331         PINCTRL_PIN(226, "GP175"),
 332         PINCTRL_PIN(227, "GP176"),
 333         /* Family 15: PTI (5 pins) */
 334         PINCTRL_PIN(228, "GP72_PTI_CLK"),
 335         PINCTRL_PIN(229, "GP73_PTI_D0"),
 336         PINCTRL_PIN(230, "GP74_PTI_D1"),
 337         PINCTRL_PIN(231, "GP75_PTI_D2"),
 338         PINCTRL_PIN(232, "GP76_PTI_D3"),
 339         /* Family 16: USB3 (0 pins) */
 340         /* Family 17: HSIC (0 pins) */
 341         /* Family 18: Broadcast (0 pins) */
 342 };
 343
 344 static const unsigned int mrfld_sdio_pins[] = { 50, 51, 52, 53, 54, 55, 56 };
 345 static const unsigned int mrfld_i2s2_pins[] = { 75, 76, 77, 78 };
 346 static const unsigned int mrfld_spi5_pins[] = { 90, 91, 92, 93, 94, 95, 96 };
 347 static const unsigned int mrfld_uart0_pins[] = { 115, 116, 117, 118 };
 348 static const unsigned int mrfld_uart1_pins[] = { 119, 120, 121, 122 };
 349 static const unsigned int mrfld_uart2_pins[] = { 123, 124, 125, 126 };
 350 static const unsigned int mrfld_pwm0_pins[] = { 144 };
 351 static const unsigned int mrfld_pwm1_pins[] = { 145 };
 352 static const unsigned int mrfld_pwm2_pins[] = { 132 };
 353 static const unsigned int mrfld_pwm3_pins[] = { 133 };
 354
 355 static const struct intel_pingroup mrfld_groups[] = {
 356         PIN_GROUP("sdio_grp", mrfld_sdio_pins, 1),
 357         PIN_GROUP("i2s2_grp", mrfld_i2s2_pins, 1),
 358         PIN_GROUP("spi5_grp", mrfld_spi5_pins, 1),
 359         PIN_GROUP("uart0_grp", mrfld_uart0_pins, 1),
 360         PIN_GROUP("uart1_grp", mrfld_uart1_pins, 1),
 361         PIN_GROUP("uart2_grp", mrfld_uart2_pins, 1),
 362         PIN_GROUP("pwm0_grp", mrfld_pwm0_pins, 1),
 363         PIN_GROUP("pwm1_grp", mrfld_pwm1_pins, 1),
 364         PIN_GROUP("pwm2_grp", mrfld_pwm2_pins, 1),
 365         PIN_GROUP("pwm3_grp", mrfld_pwm3_pins, 1),
 366 };
 367
 368 static const char * const mrfld_sdio_groups[] = { "sdio_grp" };
 369 static const char * const mrfld_i2s2_groups[] = { "i2s2_grp" };
 370 static const char * const mrfld_spi5_groups[] = { "spi5_grp" };
 371 static const char * const mrfld_uart0_groups[] = { "uart0_grp" };
 372 static const char * const mrfld_uart1_groups[] = { "uart1_grp" };
 373 static const char * const mrfld_uart2_groups[] = { "uart2_grp" };
 374 static const char * const mrfld_pwm0_groups[] = { "pwm0_grp" };
 375 static const char * const mrfld_pwm1_groups[] = { "pwm1_grp" };
 376 static const char * const mrfld_pwm2_groups[] = { "pwm2_grp" };
 377 static const char * const mrfld_pwm3_groups[] = { "pwm3_grp" };
 378
 379 static const struct intel_function mrfld_functions[] = {
 380         FUNCTION("sdio", mrfld_sdio_groups),
 381         FUNCTION("i2s2", mrfld_i2s2_groups),
 382         FUNCTION("spi5", mrfld_spi5_groups),
 383         FUNCTION("uart0", mrfld_uart0_groups),
 384         FUNCTION("uart1", mrfld_uart1_groups),
 385         FUNCTION("uart2", mrfld_uart2_groups),
 386         FUNCTION("pwm0", mrfld_pwm0_groups),
 387         FUNCTION("pwm1", mrfld_pwm1_groups),
 388         FUNCTION("pwm2", mrfld_pwm2_groups),
 389         FUNCTION("pwm3", mrfld_pwm3_groups),
 390 };
 391
 392 static const struct mrfld_family mrfld_families[] = {
 393         MRFLD_FAMILY(1, 0, 12),
 394         MRFLD_FAMILY(2, 13, 36),
 395         MRFLD_FAMILY(3, 37, 56),
 396         MRFLD_FAMILY(4, 57, 64),
 397         MRFLD_FAMILY(5, 65, 78),
 398         MRFLD_FAMILY(6, 79, 100),
 399         MRFLD_FAMILY_PROTECTED(7, 101, 114),
 400         MRFLD_FAMILY(8, 115, 126),
 401         MRFLD_FAMILY(9, 127, 145),
 402         MRFLD_FAMILY(10, 146, 157),
 403         MRFLD_FAMILY(11, 158, 179),
 404         MRFLD_FAMILY_PROTECTED(12, 180, 194),
 405         MRFLD_FAMILY(13, 195, 214),
 406         MRFLD_FAMILY(14, 215, 227),
 407         MRFLD_FAMILY(15, 228, 232),
 408 };
 409
 410 /**
 411  * struct mrfld_pinctrl - Intel Merrifield pinctrl private structure
 412  * @dev: Pointer to the device structure
 413  * @lock: Lock to serialize register access
 414  * @pctldesc: Pin controller description
 415  * @pctldev: Pointer to the pin controller device
 416  * @families: Array of families this pinctrl handles
 417  * @nfamilies: Number of families in the array
 418  * @functions: Array of functions
 419  * @nfunctions: Number of functions in the array
 420  * @groups: Array of pin groups
 421  * @ngroups: Number of groups in the array
 422  * @pins: Array of pins this pinctrl controls
 423  * @npins: Number of pins in the array
 424  */
 425 struct mrfld_pinctrl {
 426         struct device *dev;
 427         raw_spinlock_t lock;
 428         struct pinctrl_desc pctldesc;
 429         struct pinctrl_dev *pctldev;
 430
 431         /* Pin controller configuration */
 432         const struct mrfld_family *families;
 433         size_t nfamilies;
 434         const struct intel_function *functions;
 435         size_t nfunctions;
 436         const struct intel_pingroup *groups;
 437         size_t ngroups;
 438         const struct pinctrl_pin_desc *pins;
 439         size_t npins;
 440 };
 441
 442 #define pin_to_bufno(f, p)              ((p) - (f)->pin_base)
 443
 444 static const struct mrfld_family *mrfld_get_family(struct mrfld_pinctrl *mp,
 445                                                    unsigned int pin)
 446 {
 447         const struct mrfld_family *family;
 448         unsigned int i;
 449
 450         for (i = 0; i < mp->nfamilies; i++) {
 451                 family = &mp->families[i];
 452                 if (pin >= family->pin_base &&
 453                     pin < family->pin_base + family->npins)
 454                         return family;
 455         }
 456
 457         dev_warn(mp->dev, "failed to find family for pin %u\n", pin);
 458         return NULL;
 459 }
 460
 461 static bool mrfld_buf_available(struct mrfld_pinctrl *mp, unsigned int pin)
 462 {
 463         const struct mrfld_family *family;
 464
 465         family = mrfld_get_family(mp, pin);
 466         if (!family)
 467                 return false;
 468
 469         return !family->protected;
 470 }
 471
 472 static void __iomem *mrfld_get_bufcfg(struct mrfld_pinctrl *mp, unsigned int pin)
 473 {
 474         const struct mrfld_family *family;
 475         unsigned int bufno;
 476
 477         family = mrfld_get_family(mp, pin);
 478         if (!family)
 479                 return NULL;
 480
 481         bufno = pin_to_bufno(family, pin);
 482         return family->regs + BUFCFG_OFFSET + bufno * 4;
 483 }
 484
 485 static int mrfld_read_bufcfg(struct mrfld_pinctrl *mp, unsigned int pin, u32 *value)
 486 {
 487         void __iomem *bufcfg;
 488
 489         if (!mrfld_buf_available(mp, pin))
 490                 return -EBUSY;
 491
 492         bufcfg = mrfld_get_bufcfg(mp, pin);
 493         *value = readl(bufcfg);
 494
 495         return 0;
 496 }
 497
 498 static void mrfld_update_bufcfg(struct mrfld_pinctrl *mp, unsigned int pin,
 499                                 u32 bits, u32 mask)
 500 {
 501         void __iomem *bufcfg;
 502         u32 value;
 503
 504         bufcfg = mrfld_get_bufcfg(mp, pin);
 505         value = readl(bufcfg);
 506
 507         value &= ~mask;
 508         value |= bits & mask;
 509
 510         writel(value, bufcfg);
 511 }
 512
 513 static int mrfld_get_groups_count(struct pinctrl_dev *pctldev)
 514 {
 515         struct mrfld_pinctrl *mp = pinctrl_dev_get_drvdata(pctldev);
 516
 517         return mp->ngroups;
 518 }
 519
 520 static const char *mrfld_get_group_name(struct pinctrl_dev *pctldev,
 521                                         unsigned int group)
 522 {
 523         struct mrfld_pinctrl *mp = pinctrl_dev_get_drvdata(pctldev);
 524
 525         return mp->groups[group].grp.name;
 526 }
 527
 528 static int mrfld_get_group_pins(struct pinctrl_dev *pctldev, unsigned int group,
 529                                 const unsigned int **pins, unsigned int *npins)
 530 {
 531         struct mrfld_pinctrl *mp = pinctrl_dev_get_drvdata(pctldev);
 532
 533         *pins = mp->groups[group].grp.pins;
 534         *npins = mp->groups[group].grp.npins;
 535         return 0;
 536 }
 537
 538 static void mrfld_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s,
 539                                unsigned int pin)
 540 {
 541         struct mrfld_pinctrl *mp = pinctrl_dev_get_drvdata(pctldev);
 542         u32 value, mode;
 543         int ret;
 544
 545         ret = mrfld_read_bufcfg(mp, pin, &value);
 546         if (ret) {
 547                 seq_puts(s, "not available");
 548                 return;
 549         }
 550
 551         mode = (value & BUFCFG_PINMODE_MASK) >> BUFCFG_PINMODE_SHIFT;
 552         if (mode == BUFCFG_PINMODE_GPIO)
 553                 seq_puts(s, "GPIO ");
 554         else
 555                 seq_printf(s, "mode %d ", mode);
 556
 557         seq_printf(s, "0x%08x", value);
 558 }
 559
 560 static const struct pinctrl_ops mrfld_pinctrl_ops = {
 561         .get_groups_count = mrfld_get_groups_count,
 562         .get_group_name = mrfld_get_group_name,
 563         .get_group_pins = mrfld_get_group_pins,
 564         .pin_dbg_show = mrfld_pin_dbg_show,
 565 };
 566
 567 static int mrfld_get_functions_count(struct pinctrl_dev *pctldev)
 568 {
 569         struct mrfld_pinctrl *mp = pinctrl_dev_get_drvdata(pctldev);
 570
 571         return mp->nfunctions;
 572 }
 573
 574 static const char *mrfld_get_function_name(struct pinctrl_dev *pctldev,
 575                                            unsigned int function)
 576 {
 577         struct mrfld_pinctrl *mp = pinctrl_dev_get_drvdata(pctldev);
 578
 579         return mp->functions[function].func.name;
 580 }
 581
 582 static int mrfld_get_function_groups(struct pinctrl_dev *pctldev,
 583                                      unsigned int function,
 584                                      const char * const **groups,
 585                                      unsigned int * const ngroups)
 586 {
 587         struct mrfld_pinctrl *mp = pinctrl_dev_get_drvdata(pctldev);
 588
 589         *groups = mp->functions[function].func.groups;
 590         *ngroups = mp->functions[function].func.ngroups;
 591         return 0;
 592 }
 593
 594 static int mrfld_pinmux_set_mux(struct pinctrl_dev *pctldev,
 595                                 unsigned int function,
 596                                 unsigned int group)
 597 {
 598         struct mrfld_pinctrl *mp = pinctrl_dev_get_drvdata(pctldev);
 599         const struct intel_pingroup *grp = &mp->groups[group];
 600         u32 bits = grp->mode << BUFCFG_PINMODE_SHIFT;
 601         u32 mask = BUFCFG_PINMODE_MASK;
 602         unsigned long flags;
 603         unsigned int i;
 604
 605         /*
 606          * All pins in the groups needs to be accessible and writable
 607          * before we can enable the mux for this group.
 608          */
 609         for (i = 0; i < grp->grp.npins; i++) {
 610                 if (!mrfld_buf_available(mp, grp->grp.pins[i]))
 611                         return -EBUSY;
 612         }
 613
 614         /* Now enable the mux setting for each pin in the group */
 615         raw_spin_lock_irqsave(&mp->lock, flags);
 616         for (i = 0; i < grp->grp.npins; i++)
 617                 mrfld_update_bufcfg(mp, grp->grp.pins[i], bits, mask);
 618         raw_spin_unlock_irqrestore(&mp->lock, flags);
 619
 620         return 0;
 621 }
 622
 623 static int mrfld_gpio_request_enable(struct pinctrl_dev *pctldev,
 624                                      struct pinctrl_gpio_range *range,
 625                                      unsigned int pin)
 626 {
 627         struct mrfld_pinctrl *mp = pinctrl_dev_get_drvdata(pctldev);
 628         u32 bits = BUFCFG_PINMODE_GPIO << BUFCFG_PINMODE_SHIFT;
 629         u32 mask = BUFCFG_PINMODE_MASK;
 630         unsigned long flags;
 631
 632         if (!mrfld_buf_available(mp, pin))
 633                 return -EBUSY;
 634
 635         raw_spin_lock_irqsave(&mp->lock, flags);
 636         mrfld_update_bufcfg(mp, pin, bits, mask);
 637         raw_spin_unlock_irqrestore(&mp->lock, flags);
 638
 639         return 0;
 640 }
 641
 642 static const struct pinmux_ops mrfld_pinmux_ops = {
 643         .get_functions_count = mrfld_get_functions_count,
 644         .get_function_name = mrfld_get_function_name,
 645         .get_function_groups = mrfld_get_function_groups,
 646         .set_mux = mrfld_pinmux_set_mux,
 647         .gpio_request_enable = mrfld_gpio_request_enable,
 648 };
 649
 650 static int mrfld_config_get(struct pinctrl_dev *pctldev, unsigned int pin,
 651                             unsigned long *config)
 652 {
 653         struct mrfld_pinctrl *mp = pinctrl_dev_get_drvdata(pctldev);
 654         enum pin_config_param param = pinconf_to_config_param(*config);
 655         u32 value, term;
 656         u16 arg = 0;
 657         int ret;
 658
 659         ret = mrfld_read_bufcfg(mp, pin, &value);
 660         if (ret)
 661                 return -ENOTSUPP;
 662
 663         term = (value & BUFCFG_PUPD_VAL_MASK) >> BUFCFG_PUPD_VAL_SHIFT;
 664
 665         switch (param) {
 666         case PIN_CONFIG_BIAS_DISABLE:
 667                 if (value & BUFCFG_Px_EN_MASK)
 668                         return -EINVAL;
 669                 break;
 670
 671         case PIN_CONFIG_BIAS_PULL_UP:
 672                 if ((value & BUFCFG_Px_EN_MASK) != BUFCFG_PU_EN)
 673                         return -EINVAL;
 674
 675                 switch (term) {
 676                 case BUFCFG_PUPD_VAL_910:
 677                         arg = 910;
 678                         break;
 679                 case BUFCFG_PUPD_VAL_2K:
 680                         arg = 2000;
 681                         break;
 682                 case BUFCFG_PUPD_VAL_20K:
 683                         arg = 20000;
 684                         break;
 685                 case BUFCFG_PUPD_VAL_50K:
 686                         arg = 50000;
 687                         break;
 688                 }
 689
 690                 break;
 691
 692         case PIN_CONFIG_BIAS_PULL_DOWN:
 693                 if ((value & BUFCFG_Px_EN_MASK) != BUFCFG_PD_EN)
 694                         return -EINVAL;
 695
 696                 switch (term) {
 697                 case BUFCFG_PUPD_VAL_910:
 698                         arg = 910;
 699                         break;
 700                 case BUFCFG_PUPD_VAL_2K:
 701                         arg = 2000;
 702                         break;
 703                 case BUFCFG_PUPD_VAL_20K:
 704                         arg = 20000;
 705                         break;
 706                 case BUFCFG_PUPD_VAL_50K:
 707                         arg = 50000;
 708                         break;
 709                 }
 710
 711                 break;
 712
 713         case PIN_CONFIG_DRIVE_PUSH_PULL:
 714                 if (value & BUFCFG_OD_EN)
 715                         return -EINVAL;
 716                 break;
 717
 718         case PIN_CONFIG_DRIVE_OPEN_DRAIN:
 719                 if (!(value & BUFCFG_OD_EN))
 720                         return -EINVAL;
 721                 break;
 722
 723         case PIN_CONFIG_SLEW_RATE:
 724                 if (!(value & BUFCFG_SLEWSEL))
 725                         arg = 0;
 726                 else
 727                         arg = 1;
 728                 break;
 729
 730         default:
 731                 return -ENOTSUPP;
 732         }
 733
 734         *config = pinconf_to_config_packed(param, arg);
 735         return 0;
 736 }
 737
 738 static int mrfld_config_set_pin(struct mrfld_pinctrl *mp, unsigned int pin,
 739                                 unsigned long config)
 740 {
 741         unsigned int param = pinconf_to_config_param(config);
 742         unsigned int arg = pinconf_to_config_argument(config);
 743         u32 bits = 0, mask = 0;
 744         unsigned long flags;
 745
 746         switch (param) {
 747         case PIN_CONFIG_BIAS_DISABLE:
 748                 mask |= BUFCFG_Px_EN_MASK | BUFCFG_PUPD_VAL_MASK;
 749                 break;
 750
 751         case PIN_CONFIG_BIAS_PULL_UP:
 752                 mask |= BUFCFG_Px_EN_MASK | BUFCFG_PUPD_VAL_MASK;
 753                 bits |= BUFCFG_PU_EN;
 754
 755                 /* Set default strength value in case none is given */
 756                 if (arg == 1)
 757                         arg = 20000;
 758
 759                 switch (arg) {
 760                 case 50000:
 761                         bits |= BUFCFG_PUPD_VAL_50K << BUFCFG_PUPD_VAL_SHIFT;
 762                         break;
 763                 case 20000:
 764                         bits |= BUFCFG_PUPD_VAL_20K << BUFCFG_PUPD_VAL_SHIFT;
 765                         break;
 766                 case 2000:
 767                         bits |= BUFCFG_PUPD_VAL_2K << BUFCFG_PUPD_VAL_SHIFT;
 768                         break;
 769                 default:
 770                         return -EINVAL;
 771                 }
 772
 773                 break;
 774
 775         case PIN_CONFIG_BIAS_PULL_DOWN:
 776                 mask |= BUFCFG_Px_EN_MASK | BUFCFG_PUPD_VAL_MASK;
 777                 bits |= BUFCFG_PD_EN;
 778
 779                 /* Set default strength value in case none is given */
 780                 if (arg == 1)
 781                         arg = 20000;
 782
 783                 switch (arg) {
 784                 case 50000:
 785                         bits |= BUFCFG_PUPD_VAL_50K << BUFCFG_PUPD_VAL_SHIFT;
 786                         break;
 787                 case 20000:
 788                         bits |= BUFCFG_PUPD_VAL_20K << BUFCFG_PUPD_VAL_SHIFT;
 789                         break;
 790                 case 2000:
 791                         bits |= BUFCFG_PUPD_VAL_2K << BUFCFG_PUPD_VAL_SHIFT;
 792                         break;
 793                 default:
 794                         return -EINVAL;
 795                 }
 796
 797                 break;
 798
 799         case PIN_CONFIG_DRIVE_PUSH_PULL:
 800                 mask |= BUFCFG_OD_EN;
 801                 bits &= ~BUFCFG_OD_EN;
 802                 break;
 803
 804         case PIN_CONFIG_DRIVE_OPEN_DRAIN:
 805                 mask |= BUFCFG_OD_EN;
 806                 bits |= BUFCFG_OD_EN;
 807                 break;
 808
 809         case PIN_CONFIG_SLEW_RATE:
 810                 mask |= BUFCFG_SLEWSEL;
 811                 if (arg)
 812                         bits |= BUFCFG_SLEWSEL;
 813                 break;
 814         }
 815
 816         raw_spin_lock_irqsave(&mp->lock, flags);
 817         mrfld_update_bufcfg(mp, pin, bits, mask);
 818         raw_spin_unlock_irqrestore(&mp->lock, flags);
 819
 820         return 0;
 821 }
 822
 823 static int mrfld_config_set(struct pinctrl_dev *pctldev, unsigned int pin,
 824                             unsigned long *configs, unsigned int nconfigs)
 825 {
 826         struct mrfld_pinctrl *mp = pinctrl_dev_get_drvdata(pctldev);
 827         unsigned int i;
 828         int ret;
 829
 830         if (!mrfld_buf_available(mp, pin))
 831                 return -ENOTSUPP;
 832
 833         for (i = 0; i < nconfigs; i++) {
 834                 switch (pinconf_to_config_param(configs[i])) {
 835                 case PIN_CONFIG_BIAS_DISABLE:
 836                 case PIN_CONFIG_BIAS_PULL_UP:
 837                 case PIN_CONFIG_BIAS_PULL_DOWN:
 838                 case PIN_CONFIG_DRIVE_PUSH_PULL:
 839                 case PIN_CONFIG_DRIVE_OPEN_DRAIN:
 840                 case PIN_CONFIG_SLEW_RATE:
 841                         ret = mrfld_config_set_pin(mp, pin, configs[i]);
 842                         if (ret)
 843                                 return ret;
 844                         break;
 845
 846                 default:
 847                         return -ENOTSUPP;
 848                 }
 849         }
 850
 851         return 0;
 852 }
 853
 854 static int mrfld_config_group_get(struct pinctrl_dev *pctldev,
 855                                   unsigned int group, unsigned long *config)
 856 {
 857         const unsigned int *pins;
 858         unsigned int npins;
 859         int ret;
 860
 861         ret = mrfld_get_group_pins(pctldev, group, &pins, &npins);
 862         if (ret)
 863                 return ret;
 864
 865         ret = mrfld_config_get(pctldev, pins[0], config);
 866         if (ret)
 867                 return ret;
 868
 869         return 0;
 870 }
 871
 872 static int mrfld_config_group_set(struct pinctrl_dev *pctldev,
 873                                   unsigned int group, unsigned long *configs,
 874                                   unsigned int num_configs)
 875 {
 876         const unsigned int *pins;
 877         unsigned int npins;
 878         int i, ret;
 879
 880         ret = mrfld_get_group_pins(pctldev, group, &pins, &npins);
 881         if (ret)
 882                 return ret;
 883
 884         for (i = 0; i < npins; i++) {
 885                 ret = mrfld_config_set(pctldev, pins[i], configs, num_configs);
 886                 if (ret)
 887                         return ret;
 888         }
 889
 890         return 0;
 891 }
 892
 893 static const struct pinconf_ops mrfld_pinconf_ops = {
 894         .is_generic = true,
 895         .pin_config_get = mrfld_config_get,
 896         .pin_config_set = mrfld_config_set,
 897         .pin_config_group_get = mrfld_config_group_get,
 898         .pin_config_group_set = mrfld_config_group_set,
 899 };
 900
 901 static const struct pinctrl_desc mrfld_pinctrl_desc = {
 902         .pctlops = &mrfld_pinctrl_ops,
 903         .pmxops = &mrfld_pinmux_ops,
 904         .confops = &mrfld_pinconf_ops,
 905         .owner = THIS_MODULE,
 906 };
 907
 908 static int mrfld_pinctrl_probe(struct platform_device *pdev)
 909 {
 910         struct device *dev = &pdev->dev;
 911         struct mrfld_family *families;
 912         struct mrfld_pinctrl *mp;
 913         void __iomem *regs;
 914         size_t nfamilies;
 915         unsigned int i;
 916
 917         mp = devm_kzalloc(dev, sizeof(*mp), GFP_KERNEL);
 918         if (!mp)
 919                 return -ENOMEM;
 920
 921         mp->dev = dev;
 922         raw_spin_lock_init(&mp->lock);
 923
 924         regs = devm_platform_ioremap_resource(pdev, 0);
 925         if (IS_ERR(regs))
 926                 return PTR_ERR(regs);
 927
 928         /*
 929          * Make a copy of the families which we can use to hold pointers
 930          * to the registers.
 931          */
 932         nfamilies = ARRAY_SIZE(mrfld_families),
 933         families = devm_kmemdup(dev, mrfld_families, sizeof(mrfld_families), GFP_KERNEL);
 934         if (!families)
 935                 return -ENOMEM;
 936
 937         /* Splice memory resource by chunk per family */
 938         for (i = 0; i < nfamilies; i++) {
 939                 struct mrfld_family *family = &families[i];
 940
 941                 family->regs = regs + family->barno * MRFLD_FAMILY_LEN;
 942         }
 943
 944         mp->families = families;
 945         mp->nfamilies = nfamilies;
 946         mp->functions = mrfld_functions;
 947         mp->nfunctions = ARRAY_SIZE(mrfld_functions);
 948         mp->groups = mrfld_groups;
 949         mp->ngroups = ARRAY_SIZE(mrfld_groups);
 950         mp->pctldesc = mrfld_pinctrl_desc;
 951         mp->pctldesc.name = dev_name(dev);
 952         mp->pctldesc.pins = mrfld_pins;
 953         mp->pctldesc.npins = ARRAY_SIZE(mrfld_pins);
 954
 955         mp->pctldev = devm_pinctrl_register(dev, &mp->pctldesc, mp);
 956         if (IS_ERR(mp->pctldev)) {
 957                 dev_err(dev, "failed to register pinctrl driver\n");
 958                 return PTR_ERR(mp->pctldev);
 959         }
 960
 961         platform_set_drvdata(pdev, mp);
 962         return 0;
 963 }
 964
 965 static const struct acpi_device_id mrfld_acpi_table[] = {
 966         { "INTC1002" },
 967         { }
 968 };
 969 MODULE_DEVICE_TABLE(acpi, mrfld_acpi_table);
 970
 971 static struct platform_driver mrfld_pinctrl_driver = {
 972         .probe = mrfld_pinctrl_probe,
 973         .driver = {
 974                 .name = "pinctrl-merrifield",
 975                 .acpi_match_table = mrfld_acpi_table,
 976         },
 977 };
 978
 979 static int __init mrfld_pinctrl_init(void)
 980 {
 981         return platform_driver_register(&mrfld_pinctrl_driver);
 982 }
 983 subsys_initcall(mrfld_pinctrl_init);
 984
 985 static void __exit mrfld_pinctrl_exit(void)
 986 {
 987         platform_driver_unregister(&mrfld_pinctrl_driver);
 988 }
 989 module_exit(mrfld_pinctrl_exit);
 990
 991 MODULE_AUTHOR("Andy Shevchenko <[email protected]>");
 992 MODULE_DESCRIPTION("Intel Merrifield SoC pinctrl driver");
 993 MODULE_LICENSE("GPL v2");
 994 MODULE_ALIAS("platform:pinctrl-merrifield");