drivers/pinctrl/pinctrl-k210.c

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