/* * Intel Merrifield SoC pinctrl driver * * Copyright (C) 2016, Intel Corporation * Author: Andy Shevchenko <andriy.shevchenko@linux.intel.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include <linux/bitops.h> #include <linux/err.h> #include <linux/io.h> #include <linux/module.h> #include <linux/platform_device.h> #include <linux/pinctrl/pinconf.h> #include <linux/pinctrl/pinconf-generic.h> #include <linux/pinctrl/pinctrl.h> #include <linux/pinctrl/pinmux.h> #include "pinctrl-intel.h" #define MRFLD_FAMILY_NR 64 #define MRFLD_FAMILY_LEN 0x400 #define SLEW_OFFSET 0x000 #define BUFCFG_OFFSET 0x100 #define MISC_OFFSET 0x300 #define BUFCFG_PINMODE_SHIFT 0 #define BUFCFG_PINMODE_MASK GENMASK(2, 0) #define BUFCFG_PINMODE_GPIO 0 #define BUFCFG_PUPD_VAL_SHIFT 4 #define BUFCFG_PUPD_VAL_MASK GENMASK(5, 4) #define BUFCFG_PUPD_VAL_2K 0 #define BUFCFG_PUPD_VAL_20K 1 #define BUFCFG_PUPD_VAL_50K 2 #define BUFCFG_PUPD_VAL_910 3 #define BUFCFG_PU_EN BIT(8) #define BUFCFG_PD_EN BIT(9) #define BUFCFG_Px_EN_MASK GENMASK(9, 8) #define BUFCFG_SLEWSEL BIT(10) #define BUFCFG_OVINEN BIT(12) #define BUFCFG_OVINEN_EN BIT(13) #define BUFCFG_OVINEN_MASK GENMASK(13, 12) #define BUFCFG_OVOUTEN BIT(14) #define BUFCFG_OVOUTEN_EN BIT(15) #define BUFCFG_OVOUTEN_MASK GENMASK(15, 14) #define BUFCFG_INDATAOV_VAL BIT(16) #define BUFCFG_INDATAOV_EN BIT(17) #define BUFCFG_INDATAOV_MASK GENMASK(17, 16) #define BUFCFG_OUTDATAOV_VAL BIT(18) #define BUFCFG_OUTDATAOV_EN BIT(19) #define BUFCFG_OUTDATAOV_MASK GENMASK(19, 18) #define BUFCFG_OD_EN BIT(21) /** * struct mrfld_family - Intel pin family description * @barno: MMIO BAR number where registers for this family reside * @pin_base: Starting pin of pins in this family * @npins: Number of pins in this family * @protected: True if family is protected by access * @regs: family specific common registers */ struct mrfld_family { unsigned int barno; unsigned int pin_base; size_t npins; bool protected; void __iomem *regs; }; #define MRFLD_FAMILY(b, s, e) \ { \ .barno = (b), \ .pin_base = (s), \ .npins = (e) - (s) + 1, \ } #define MRFLD_FAMILY_PROTECTED(b, s, e) \ { \ .barno = (b), \ .pin_base = (s), \ .npins = (e) - (s) + 1, \ .protected = true, \ } static const struct pinctrl_pin_desc mrfld_pins[] = { /* Family 0: OCP2SSC (0 pins) */ /* Family 1: ULPI (13 pins) */ PINCTRL_PIN(0, "ULPI_CLK"), PINCTRL_PIN(1, "ULPI_D0"), PINCTRL_PIN(2, "ULPI_D1"), PINCTRL_PIN(3, "ULPI_D2"), PINCTRL_PIN(4, "ULPI_D3"), PINCTRL_PIN(5, "ULPI_D4"), PINCTRL_PIN(6, "ULPI_D5"), PINCTRL_PIN(7, "ULPI_D6"), PINCTRL_PIN(8, "ULPI_D7"), PINCTRL_PIN(9, "ULPI_DIR"), PINCTRL_PIN(10, "ULPI_NXT"), PINCTRL_PIN(11, "ULPI_REFCLK"), PINCTRL_PIN(12, "ULPI_STP"), /* Family 2: eMMC (24 pins) */ PINCTRL_PIN(13, "EMMC_CLK"), PINCTRL_PIN(14, "EMMC_CMD"), PINCTRL_PIN(15, "EMMC_D0"), PINCTRL_PIN(16, "EMMC_D1"), PINCTRL_PIN(17, "EMMC_D2"), PINCTRL_PIN(18, "EMMC_D3"), PINCTRL_PIN(19, "EMMC_D4"), PINCTRL_PIN(20, "EMMC_D5"), PINCTRL_PIN(21, "EMMC_D6"), PINCTRL_PIN(22, "EMMC_D7"), PINCTRL_PIN(23, "EMMC_RST_N"), PINCTRL_PIN(24, "GP154"), PINCTRL_PIN(25, "GP155"), PINCTRL_PIN(26, "GP156"), PINCTRL_PIN(27, "GP157"), PINCTRL_PIN(28, "GP158"), PINCTRL_PIN(29, "GP159"), PINCTRL_PIN(30, "GP160"), PINCTRL_PIN(31, "GP161"), PINCTRL_PIN(32, "GP162"), PINCTRL_PIN(33, "GP163"), PINCTRL_PIN(34, "GP97"), PINCTRL_PIN(35, "GP14"), PINCTRL_PIN(36, "GP15"), /* Family 3: SDIO (20 pins) */ PINCTRL_PIN(37, "GP77_SD_CD"), PINCTRL_PIN(38, "GP78_SD_CLK"), PINCTRL_PIN(39, "GP79_SD_CMD"), PINCTRL_PIN(40, "GP80_SD_D0"), PINCTRL_PIN(41, "GP81_SD_D1"), PINCTRL_PIN(42, "GP82_SD_D2"), PINCTRL_PIN(43, "GP83_SD_D3"), PINCTRL_PIN(44, "GP84_SD_LS_CLK_FB"), PINCTRL_PIN(45, "GP85_SD_LS_CMD_DIR"), PINCTRL_PIN(46, "GP86_SD_LVL_D_DIR"), PINCTRL_PIN(47, "GP88_SD_LS_SEL"), PINCTRL_PIN(48, "GP87_SD_PD"), PINCTRL_PIN(49, "GP89_SD_WP"), PINCTRL_PIN(50, "GP90_SDIO_CLK"), PINCTRL_PIN(51, "GP91_SDIO_CMD"), PINCTRL_PIN(52, "GP92_SDIO_D0"), PINCTRL_PIN(53, "GP93_SDIO_D1"), PINCTRL_PIN(54, "GP94_SDIO_D2"), PINCTRL_PIN(55, "GP95_SDIO_D3"), PINCTRL_PIN(56, "GP96_SDIO_PD"), /* Family 4: HSI (8 pins) */ PINCTRL_PIN(57, "HSI_ACDATA"), PINCTRL_PIN(58, "HSI_ACFLAG"), PINCTRL_PIN(59, "HSI_ACREADY"), PINCTRL_PIN(60, "HSI_ACWAKE"), PINCTRL_PIN(61, "HSI_CADATA"), PINCTRL_PIN(62, "HSI_CAFLAG"), PINCTRL_PIN(63, "HSI_CAREADY"), PINCTRL_PIN(64, "HSI_CAWAKE"), /* Family 5: SSP Audio (14 pins) */ PINCTRL_PIN(65, "GP70"), PINCTRL_PIN(66, "GP71"), PINCTRL_PIN(67, "GP32_I2S_0_CLK"), PINCTRL_PIN(68, "GP33_I2S_0_FS"), PINCTRL_PIN(69, "GP34_I2S_0_RXD"), PINCTRL_PIN(70, "GP35_I2S_0_TXD"), PINCTRL_PIN(71, "GP36_I2S_1_CLK"), PINCTRL_PIN(72, "GP37_I2S_1_FS"), PINCTRL_PIN(73, "GP38_I2S_1_RXD"), PINCTRL_PIN(74, "GP39_I2S_1_TXD"), PINCTRL_PIN(75, "GP40_I2S_2_CLK"), PINCTRL_PIN(76, "GP41_I2S_2_FS"), PINCTRL_PIN(77, "GP42_I2S_2_RXD"), PINCTRL_PIN(78, "GP43_I2S_2_TXD"), /* Family 6: GP SSP (22 pins) */ PINCTRL_PIN(79, "GP120_SPI_3_CLK"), PINCTRL_PIN(80, "GP121_SPI_3_SS"), PINCTRL_PIN(81, "GP122_SPI_3_RXD"), PINCTRL_PIN(82, "GP123_SPI_3_TXD"), PINCTRL_PIN(83, "GP102_SPI_4_CLK"), PINCTRL_PIN(84, "GP103_SPI_4_SS_0"), PINCTRL_PIN(85, "GP104_SPI_4_SS_1"), PINCTRL_PIN(86, "GP105_SPI_4_SS_2"), PINCTRL_PIN(87, "GP106_SPI_4_SS_3"), PINCTRL_PIN(88, "GP107_SPI_4_RXD"), PINCTRL_PIN(89, "GP108_SPI_4_TXD"), PINCTRL_PIN(90, "GP109_SPI_5_CLK"), PINCTRL_PIN(91, "GP110_SPI_5_SS_0"), PINCTRL_PIN(92, "GP111_SPI_5_SS_1"), PINCTRL_PIN(93, "GP112_SPI_5_SS_2"), PINCTRL_PIN(94, "GP113_SPI_5_SS_3"), PINCTRL_PIN(95, "GP114_SPI_5_RXD"), PINCTRL_PIN(96, "GP115_SPI_5_TXD"), PINCTRL_PIN(97, "GP116_SPI_6_CLK"), PINCTRL_PIN(98, "GP117_SPI_6_SS"), PINCTRL_PIN(99, "GP118_SPI_6_RXD"), PINCTRL_PIN(100, "GP119_SPI_6_TXD"), /* Family 7: I2C (14 pins) */ PINCTRL_PIN(101, "GP19_I2C_1_SCL"), PINCTRL_PIN(102, "GP20_I2C_1_SDA"), PINCTRL_PIN(103, "GP21_I2C_2_SCL"), PINCTRL_PIN(104, "GP22_I2C_2_SDA"), PINCTRL_PIN(105, "GP17_I2C_3_SCL_HDMI"), PINCTRL_PIN(106, "GP18_I2C_3_SDA_HDMI"), PINCTRL_PIN(107, "GP23_I2C_4_SCL"), PINCTRL_PIN(108, "GP24_I2C_4_SDA"), PINCTRL_PIN(109, "GP25_I2C_5_SCL"), PINCTRL_PIN(110, "GP26_I2C_5_SDA"), PINCTRL_PIN(111, "GP27_I2C_6_SCL"), PINCTRL_PIN(112, "GP28_I2C_6_SDA"), PINCTRL_PIN(113, "GP29_I2C_7_SCL"), PINCTRL_PIN(114, "GP30_I2C_7_SDA"), /* Family 8: UART (12 pins) */ PINCTRL_PIN(115, "GP124_UART_0_CTS"), PINCTRL_PIN(116, "GP125_UART_0_RTS"), PINCTRL_PIN(117, "GP126_UART_0_RX"), PINCTRL_PIN(118, "GP127_UART_0_TX"), PINCTRL_PIN(119, "GP128_UART_1_CTS"), PINCTRL_PIN(120, "GP129_UART_1_RTS"), PINCTRL_PIN(121, "GP130_UART_1_RX"), PINCTRL_PIN(122, "GP131_UART_1_TX"), PINCTRL_PIN(123, "GP132_UART_2_CTS"), PINCTRL_PIN(124, "GP133_UART_2_RTS"), PINCTRL_PIN(125, "GP134_UART_2_RX"), PINCTRL_PIN(126, "GP135_UART_2_TX"), /* Family 9: GPIO South (19 pins) */ PINCTRL_PIN(127, "GP177"), PINCTRL_PIN(128, "GP178"), PINCTRL_PIN(129, "GP179"), PINCTRL_PIN(130, "GP180"), PINCTRL_PIN(131, "GP181"), PINCTRL_PIN(132, "GP182_PWM2"), PINCTRL_PIN(133, "GP183_PWM3"), PINCTRL_PIN(134, "GP184"), PINCTRL_PIN(135, "GP185"), PINCTRL_PIN(136, "GP186"), PINCTRL_PIN(137, "GP187"), PINCTRL_PIN(138, "GP188"), PINCTRL_PIN(139, "GP189"), PINCTRL_PIN(140, "GP64_FAST_INT0"), PINCTRL_PIN(141, "GP65_FAST_INT1"), PINCTRL_PIN(142, "GP66_FAST_INT2"), PINCTRL_PIN(143, "GP67_FAST_INT3"), PINCTRL_PIN(144, "GP12_PWM0"), PINCTRL_PIN(145, "GP13_PWM1"), /* Family 10: Camera Sideband (12 pins) */ PINCTRL_PIN(146, "GP0"), PINCTRL_PIN(147, "GP1"), PINCTRL_PIN(148, "GP2"), PINCTRL_PIN(149, "GP3"), PINCTRL_PIN(150, "GP4"), PINCTRL_PIN(151, "GP5"), PINCTRL_PIN(152, "GP6"), PINCTRL_PIN(153, "GP7"), PINCTRL_PIN(154, "GP8"), PINCTRL_PIN(155, "GP9"), PINCTRL_PIN(156, "GP10"), PINCTRL_PIN(157, "GP11"), /* Family 11: Clock (22 pins) */ PINCTRL_PIN(158, "GP137"), PINCTRL_PIN(159, "GP138"), PINCTRL_PIN(160, "GP139"), PINCTRL_PIN(161, "GP140"), PINCTRL_PIN(162, "GP141"), PINCTRL_PIN(163, "GP142"), PINCTRL_PIN(164, "GP16_HDMI_HPD"), PINCTRL_PIN(165, "GP68_DSI_A_TE"), PINCTRL_PIN(166, "GP69_DSI_C_TE"), PINCTRL_PIN(167, "OSC_CLK_CTRL0"), PINCTRL_PIN(168, "OSC_CLK_CTRL1"), PINCTRL_PIN(169, "OSC_CLK0"), PINCTRL_PIN(170, "OSC_CLK1"), PINCTRL_PIN(171, "OSC_CLK2"), PINCTRL_PIN(172, "OSC_CLK3"), PINCTRL_PIN(173, "OSC_CLK4"), PINCTRL_PIN(174, "RESETOUT"), PINCTRL_PIN(175, "PMODE"), PINCTRL_PIN(176, "PRDY"), PINCTRL_PIN(177, "PREQ"), PINCTRL_PIN(178, "GP190"), PINCTRL_PIN(179, "GP191"), /* Family 12: MSIC (15 pins) */ PINCTRL_PIN(180, "I2C_0_SCL"), PINCTRL_PIN(181, "I2C_0_SDA"), PINCTRL_PIN(182, "IERR"), PINCTRL_PIN(183, "JTAG_TCK"), PINCTRL_PIN(184, "JTAG_TDI"), PINCTRL_PIN(185, "JTAG_TDO"), PINCTRL_PIN(186, "JTAG_TMS"), PINCTRL_PIN(187, "JTAG_TRST"), PINCTRL_PIN(188, "PROCHOT"), PINCTRL_PIN(189, "RTC_CLK"), PINCTRL_PIN(190, "SVID_ALERT"), PINCTRL_PIN(191, "SVID_CLK"), PINCTRL_PIN(192, "SVID_D"), PINCTRL_PIN(193, "THERMTRIP"), PINCTRL_PIN(194, "STANDBY"), /* Family 13: Keyboard (20 pins) */ PINCTRL_PIN(195, "GP44"), PINCTRL_PIN(196, "GP45"), PINCTRL_PIN(197, "GP46"), PINCTRL_PIN(198, "GP47"), PINCTRL_PIN(199, "GP48"), PINCTRL_PIN(200, "GP49"), PINCTRL_PIN(201, "GP50"), PINCTRL_PIN(202, "GP51"), PINCTRL_PIN(203, "GP52"), PINCTRL_PIN(204, "GP53"), PINCTRL_PIN(205, "GP54"), PINCTRL_PIN(206, "GP55"), PINCTRL_PIN(207, "GP56"), PINCTRL_PIN(208, "GP57"), PINCTRL_PIN(209, "GP58"), PINCTRL_PIN(210, "GP59"), PINCTRL_PIN(211, "GP60"), PINCTRL_PIN(212, "GP61"), PINCTRL_PIN(213, "GP62"), PINCTRL_PIN(214, "GP63"), /* Family 14: GPIO North (13 pins) */ PINCTRL_PIN(215, "GP164"), PINCTRL_PIN(216, "GP165"), PINCTRL_PIN(217, "GP166"), PINCTRL_PIN(218, "GP167"), PINCTRL_PIN(219, "GP168_MJTAG_TCK"), PINCTRL_PIN(220, "GP169_MJTAG_TDI"), PINCTRL_PIN(221, "GP170_MJTAG_TDO"), PINCTRL_PIN(222, "GP171_MJTAG_TMS"), PINCTRL_PIN(223, "GP172_MJTAG_TRST"), PINCTRL_PIN(224, "GP173"), PINCTRL_PIN(225, "GP174"), PINCTRL_PIN(226, "GP175"), PINCTRL_PIN(227, "GP176"), /* Family 15: PTI (5 pins) */ PINCTRL_PIN(228, "GP72_PTI_CLK"), PINCTRL_PIN(229, "GP73_PTI_D0"), PINCTRL_PIN(230, "GP74_PTI_D1"), PINCTRL_PIN(231, "GP75_PTI_D2"), PINCTRL_PIN(232, "GP76_PTI_D3"), /* Family 16: USB3 (0 pins) */ /* Family 17: HSIC (0 pins) */ /* Family 18: Broadcast (0 pins) */ }; static const unsigned int mrfld_sdio_pins[] = { 50, 51, 52, 53, 54, 55, 56 }; static const unsigned int mrfld_spi5_pins[] = { 90, 91, 92, 93, 94, 95, 96 }; static const unsigned int mrfld_uart0_pins[] = { 124, 125, 126, 127 }; static const unsigned int mrfld_uart1_pins[] = { 128, 129, 130, 131 }; static const unsigned int mrfld_uart2_pins[] = { 132, 133, 134, 135 }; static const unsigned int mrfld_pwm0_pins[] = { 144 }; static const unsigned int mrfld_pwm1_pins[] = { 145 }; static const unsigned int mrfld_pwm2_pins[] = { 132 }; static const unsigned int mrfld_pwm3_pins[] = { 133 }; static const struct intel_pingroup mrfld_groups[] = { PIN_GROUP("sdio_grp", mrfld_sdio_pins, 1), PIN_GROUP("spi5_grp", mrfld_spi5_pins, 1), PIN_GROUP("uart0_grp", mrfld_uart0_pins, 1), PIN_GROUP("uart1_grp", mrfld_uart1_pins, 1), PIN_GROUP("uart2_grp", mrfld_uart2_pins, 1), PIN_GROUP("pwm0_grp", mrfld_pwm0_pins, 1), PIN_GROUP("pwm1_grp", mrfld_pwm1_pins, 1), PIN_GROUP("pwm2_grp", mrfld_pwm2_pins, 1), PIN_GROUP("pwm3_grp", mrfld_pwm3_pins, 1), }; static const char * const mrfld_sdio_groups[] = { "sdio_grp" }; static const char * const mrfld_spi5_groups[] = { "spi5_grp" }; static const char * const mrfld_uart0_groups[] = { "uart0_grp" }; static const char * const mrfld_uart1_groups[] = { "uart1_grp" }; static const char * const mrfld_uart2_groups[] = { "uart2_grp" }; static const char * const mrfld_pwm0_groups[] = { "pwm0_grp" }; static const char * const mrfld_pwm1_groups[] = { "pwm1_grp" }; static const char * const mrfld_pwm2_groups[] = { "pwm2_grp" }; static const char * const mrfld_pwm3_groups[] = { "pwm3_grp" }; static const struct intel_function mrfld_functions[] = { FUNCTION("sdio", mrfld_sdio_groups), FUNCTION("spi5", mrfld_spi5_groups), FUNCTION("uart0", mrfld_uart0_groups), FUNCTION("uart1", mrfld_uart1_groups), FUNCTION("uart2", mrfld_uart2_groups), FUNCTION("pwm0", mrfld_pwm0_groups), FUNCTION("pwm1", mrfld_pwm1_groups), FUNCTION("pwm2", mrfld_pwm2_groups), FUNCTION("pwm3", mrfld_pwm3_groups), }; static const struct mrfld_family mrfld_families[] = { MRFLD_FAMILY(1, 0, 12), MRFLD_FAMILY(2, 13, 36), MRFLD_FAMILY(3, 37, 56), MRFLD_FAMILY(4, 57, 64), MRFLD_FAMILY(5, 65, 78), MRFLD_FAMILY(6, 79, 100), MRFLD_FAMILY_PROTECTED(7, 101, 114), MRFLD_FAMILY(8, 115, 126), MRFLD_FAMILY(9, 127, 145), MRFLD_FAMILY(10, 146, 157), MRFLD_FAMILY(11, 158, 179), MRFLD_FAMILY_PROTECTED(12, 180, 194), MRFLD_FAMILY(13, 195, 214), MRFLD_FAMILY(14, 215, 227), MRFLD_FAMILY(15, 228, 232), }; /** * struct mrfld_pinctrl - Intel Merrifield pinctrl private structure * @dev: Pointer to the device structure * @lock: Lock to serialize register access * @pctldesc: Pin controller description * @pctldev: Pointer to the pin controller device * @families: Array of families this pinctrl handles * @nfamilies: Number of families in the array * @functions: Array of functions * @nfunctions: Number of functions in the array * @groups: Array of pin groups * @ngroups: Number of groups in the array * @pins: Array of pins this pinctrl controls * @npins: Number of pins in the array */ struct mrfld_pinctrl { struct device *dev; raw_spinlock_t lock; struct pinctrl_desc pctldesc; struct pinctrl_dev *pctldev; /* Pin controller configuration */ const struct mrfld_family *families; size_t nfamilies; const struct intel_function *functions; size_t nfunctions; const struct intel_pingroup *groups; size_t ngroups; const struct pinctrl_pin_desc *pins; size_t npins; }; #define pin_to_bufno(f, p) ((p) - (f)->pin_base) static const struct mrfld_family *mrfld_get_family(struct mrfld_pinctrl *mp, unsigned int pin) { const struct mrfld_family *family; unsigned int i; for (i = 0; i < mp->nfamilies; i++) { family = &mp->families[i]; if (pin >= family->pin_base && pin < family->pin_base + family->npins) return family; } dev_warn(mp->dev, "failed to find family for pin %u\n", pin); return NULL; } static bool mrfld_buf_available(struct mrfld_pinctrl *mp, unsigned int pin) { const struct mrfld_family *family; family = mrfld_get_family(mp, pin); if (!family) return false; return !family->protected; } static void __iomem *mrfld_get_bufcfg(struct mrfld_pinctrl *mp, unsigned int pin) { const struct mrfld_family *family; unsigned int bufno; family = mrfld_get_family(mp, pin); if (!family) return NULL; bufno = pin_to_bufno(family, pin); return family->regs + BUFCFG_OFFSET + bufno * 4; } static int mrfld_get_groups_count(struct pinctrl_dev *pctldev) { struct mrfld_pinctrl *mp = pinctrl_dev_get_drvdata(pctldev); return mp->ngroups; } static const char *mrfld_get_group_name(struct pinctrl_dev *pctldev, unsigned int group) { struct mrfld_pinctrl *mp = pinctrl_dev_get_drvdata(pctldev); return mp->groups[group].name; } static int mrfld_get_group_pins(struct pinctrl_dev *pctldev, unsigned int group, const unsigned int **pins, unsigned int *npins) { struct mrfld_pinctrl *mp = pinctrl_dev_get_drvdata(pctldev); *pins = mp->groups[group].pins; *npins = mp->groups[group].npins; return 0; } static void mrfld_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s, unsigned int pin) { struct mrfld_pinctrl *mp = pinctrl_dev_get_drvdata(pctldev); void __iomem *bufcfg; u32 value, mode; if (!mrfld_buf_available(mp, pin)) { seq_puts(s, "not available"); return; } bufcfg = mrfld_get_bufcfg(mp, pin); value = readl(bufcfg); mode = (value & BUFCFG_PINMODE_MASK) >> BUFCFG_PINMODE_SHIFT; if (!mode) seq_puts(s, "GPIO "); else seq_printf(s, "mode %d ", mode); seq_printf(s, "0x%08x", value); } static const struct pinctrl_ops mrfld_pinctrl_ops = { .get_groups_count = mrfld_get_groups_count, .get_group_name = mrfld_get_group_name, .get_group_pins = mrfld_get_group_pins, .pin_dbg_show = mrfld_pin_dbg_show, }; static int mrfld_get_functions_count(struct pinctrl_dev *pctldev) { struct mrfld_pinctrl *mp = pinctrl_dev_get_drvdata(pctldev); return mp->nfunctions; } static const char *mrfld_get_function_name(struct pinctrl_dev *pctldev, unsigned int function) { struct mrfld_pinctrl *mp = pinctrl_dev_get_drvdata(pctldev); return mp->functions[function].name; } static int mrfld_get_function_groups(struct pinctrl_dev *pctldev, unsigned int function, const char * const **groups, unsigned int * const ngroups) { struct mrfld_pinctrl *mp = pinctrl_dev_get_drvdata(pctldev); *groups = mp->functions[function].groups; *ngroups = mp->functions[function].ngroups; return 0; } static void mrfld_update_bufcfg(struct mrfld_pinctrl *mp, unsigned int pin, u32 bits, u32 mask) { void __iomem *bufcfg; u32 value; bufcfg = mrfld_get_bufcfg(mp, pin); value = readl(bufcfg); value &= ~mask; value |= bits & mask; writel(value, bufcfg); } static int mrfld_pinmux_set_mux(struct pinctrl_dev *pctldev, unsigned int function, unsigned int group) { struct mrfld_pinctrl *mp = pinctrl_dev_get_drvdata(pctldev); const struct intel_pingroup *grp = &mp->groups[group]; u32 bits = grp->mode << BUFCFG_PINMODE_SHIFT; u32 mask = BUFCFG_PINMODE_MASK; unsigned long flags; unsigned int i; /* * All pins in the groups needs to be accessible and writable * before we can enable the mux for this group. */ for (i = 0; i < grp->npins; i++) { if (!mrfld_buf_available(mp, grp->pins[i])) return -EBUSY; } /* Now enable the mux setting for each pin in the group */ raw_spin_lock_irqsave(&mp->lock, flags); for (i = 0; i < grp->npins; i++) mrfld_update_bufcfg(mp, grp->pins[i], bits, mask); raw_spin_unlock_irqrestore(&mp->lock, flags); return 0; } static int mrfld_gpio_request_enable(struct pinctrl_dev *pctldev, struct pinctrl_gpio_range *range, unsigned int pin) { struct mrfld_pinctrl *mp = pinctrl_dev_get_drvdata(pctldev); u32 bits = BUFCFG_PINMODE_GPIO << BUFCFG_PINMODE_SHIFT; u32 mask = BUFCFG_PINMODE_MASK; unsigned long flags; if (!mrfld_buf_available(mp, pin)) return -EBUSY; raw_spin_lock_irqsave(&mp->lock, flags); mrfld_update_bufcfg(mp, pin, bits, mask); raw_spin_unlock_irqrestore(&mp->lock, flags); return 0; } static const struct pinmux_ops mrfld_pinmux_ops = { .get_functions_count = mrfld_get_functions_count, .get_function_name = mrfld_get_function_name, .get_function_groups = mrfld_get_function_groups, .set_mux = mrfld_pinmux_set_mux, .gpio_request_enable = mrfld_gpio_request_enable, }; static int mrfld_config_get(struct pinctrl_dev *pctldev, unsigned int pin, unsigned long *config) { struct mrfld_pinctrl *mp = pinctrl_dev_get_drvdata(pctldev); enum pin_config_param param = pinconf_to_config_param(*config); u32 value, term; u16 arg = 0; if (!mrfld_buf_available(mp, pin)) return -ENOTSUPP; value = readl(mrfld_get_bufcfg(mp, pin)); term = (value & BUFCFG_PUPD_VAL_MASK) >> BUFCFG_PUPD_VAL_SHIFT; switch (param) { case PIN_CONFIG_BIAS_DISABLE: if (value & BUFCFG_Px_EN_MASK) return -EINVAL; break; case PIN_CONFIG_BIAS_PULL_UP: if ((value & BUFCFG_Px_EN_MASK) != BUFCFG_PU_EN) return -EINVAL; switch (term) { case BUFCFG_PUPD_VAL_910: arg = 910; break; case BUFCFG_PUPD_VAL_2K: arg = 2000; break; case BUFCFG_PUPD_VAL_20K: arg = 20000; break; case BUFCFG_PUPD_VAL_50K: arg = 50000; break; } break; case PIN_CONFIG_BIAS_PULL_DOWN: if ((value & BUFCFG_Px_EN_MASK) != BUFCFG_PD_EN) return -EINVAL; switch (term) { case BUFCFG_PUPD_VAL_910: arg = 910; break; case BUFCFG_PUPD_VAL_2K: arg = 2000; break; case BUFCFG_PUPD_VAL_20K: arg = 20000; break; case BUFCFG_PUPD_VAL_50K: arg = 50000; break; } break; case PIN_CONFIG_DRIVE_OPEN_DRAIN: if (!(value & BUFCFG_OD_EN)) return -EINVAL; break; case PIN_CONFIG_SLEW_RATE: if (!(value & BUFCFG_SLEWSEL)) arg = 0; else arg = 1; break; default: return -ENOTSUPP; } *config = pinconf_to_config_packed(param, arg); return 0; } static int mrfld_config_set_pin(struct mrfld_pinctrl *mp, unsigned int pin, unsigned long config) { unsigned int param = pinconf_to_config_param(config); unsigned int arg = pinconf_to_config_argument(config); u32 bits = 0, mask = 0; unsigned long flags; switch (param) { case PIN_CONFIG_BIAS_DISABLE: mask |= BUFCFG_Px_EN_MASK | BUFCFG_PUPD_VAL_MASK; break; case PIN_CONFIG_BIAS_PULL_UP: mask |= BUFCFG_Px_EN_MASK | BUFCFG_PUPD_VAL_MASK; bits |= BUFCFG_PU_EN; switch (arg) { case 50000: bits |= BUFCFG_PUPD_VAL_50K << BUFCFG_PUPD_VAL_SHIFT; break; case 20000: bits |= BUFCFG_PUPD_VAL_20K << BUFCFG_PUPD_VAL_SHIFT; break; case 2000: bits |= BUFCFG_PUPD_VAL_2K << BUFCFG_PUPD_VAL_SHIFT; break; default: return -EINVAL; } break; case PIN_CONFIG_BIAS_PULL_DOWN: mask |= BUFCFG_Px_EN_MASK | BUFCFG_PUPD_VAL_MASK; bits |= BUFCFG_PD_EN; switch (arg) { case 50000: bits |= BUFCFG_PUPD_VAL_50K << BUFCFG_PUPD_VAL_SHIFT; break; case 20000: bits |= BUFCFG_PUPD_VAL_20K << BUFCFG_PUPD_VAL_SHIFT; break; case 2000: bits |= BUFCFG_PUPD_VAL_2K << BUFCFG_PUPD_VAL_SHIFT; break; default: return -EINVAL; } break; case PIN_CONFIG_DRIVE_OPEN_DRAIN: mask |= BUFCFG_OD_EN; if (arg) bits |= BUFCFG_OD_EN; break; case PIN_CONFIG_SLEW_RATE: mask |= BUFCFG_SLEWSEL; if (arg) bits |= BUFCFG_SLEWSEL; break; } raw_spin_lock_irqsave(&mp->lock, flags); mrfld_update_bufcfg(mp, pin, bits, mask); raw_spin_unlock_irqrestore(&mp->lock, flags); return 0; } static int mrfld_config_set(struct pinctrl_dev *pctldev, unsigned int pin, unsigned long *configs, unsigned int nconfigs) { struct mrfld_pinctrl *mp = pinctrl_dev_get_drvdata(pctldev); unsigned int i; int ret; for (i = 0; i < nconfigs; i++) { switch (pinconf_to_config_param(configs[i])) { case PIN_CONFIG_BIAS_DISABLE: case PIN_CONFIG_BIAS_PULL_UP: case PIN_CONFIG_BIAS_PULL_DOWN: case PIN_CONFIG_DRIVE_OPEN_DRAIN: case PIN_CONFIG_SLEW_RATE: ret = mrfld_config_set_pin(mp, pin, configs[i]); if (ret) return ret; break; default: return -ENOTSUPP; } } return 0; } static int mrfld_config_group_get(struct pinctrl_dev *pctldev, unsigned int group, unsigned long *config) { const unsigned int *pins; unsigned int npins; int ret; ret = mrfld_get_group_pins(pctldev, group, &pins, &npins); if (ret) return ret; ret = mrfld_config_get(pctldev, pins[0], config); if (ret) return ret; return 0; } static int mrfld_config_group_set(struct pinctrl_dev *pctldev, unsigned int group, unsigned long *configs, unsigned int num_configs) { const unsigned int *pins; unsigned int npins; int i, ret; ret = mrfld_get_group_pins(pctldev, group, &pins, &npins); if (ret) return ret; for (i = 0; i < npins; i++) { ret = mrfld_config_set(pctldev, pins[i], configs, num_configs); if (ret) return ret; } return 0; } static const struct pinconf_ops mrfld_pinconf_ops = { .is_generic = true, .pin_config_get = mrfld_config_get, .pin_config_set = mrfld_config_set, .pin_config_group_get = mrfld_config_group_get, .pin_config_group_set = mrfld_config_group_set, }; static const struct pinctrl_desc mrfld_pinctrl_desc = { .pctlops = &mrfld_pinctrl_ops, .pmxops = &mrfld_pinmux_ops, .confops = &mrfld_pinconf_ops, .owner = THIS_MODULE, }; static int mrfld_pinctrl_probe(struct platform_device *pdev) { struct mrfld_family *families; struct mrfld_pinctrl *mp; struct resource *mem; void __iomem *regs; size_t nfamilies; unsigned int i; mp = devm_kzalloc(&pdev->dev, sizeof(*mp), GFP_KERNEL); if (!mp) return -ENOMEM; mp->dev = &pdev->dev; raw_spin_lock_init(&mp->lock); mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); regs = devm_ioremap_resource(&pdev->dev, mem); if (IS_ERR(regs)) return PTR_ERR(regs); /* * Make a copy of the families which we can use to hold pointers * to the registers. */ nfamilies = ARRAY_SIZE(mrfld_families), families = devm_kmemdup(&pdev->dev, mrfld_families, sizeof(mrfld_families), GFP_KERNEL); if (!families) return -ENOMEM; /* Splice memory resource by chunk per family */ for (i = 0; i < nfamilies; i++) { struct mrfld_family *family = &families[i]; family->regs = regs + family->barno * MRFLD_FAMILY_LEN; } mp->families = families; mp->nfamilies = nfamilies; mp->functions = mrfld_functions; mp->nfunctions = ARRAY_SIZE(mrfld_functions); mp->groups = mrfld_groups; mp->ngroups = ARRAY_SIZE(mrfld_groups); mp->pctldesc = mrfld_pinctrl_desc; mp->pctldesc.name = dev_name(&pdev->dev); mp->pctldesc.pins = mrfld_pins; mp->pctldesc.npins = ARRAY_SIZE(mrfld_pins); mp->pctldev = devm_pinctrl_register(&pdev->dev, &mp->pctldesc, mp); if (IS_ERR(mp->pctldev)) { dev_err(&pdev->dev, "failed to register pinctrl driver\n"); return PTR_ERR(mp->pctldev); } platform_set_drvdata(pdev, mp); return 0; } static struct platform_driver mrfld_pinctrl_driver = { .probe = mrfld_pinctrl_probe, .driver = { .name = "pinctrl-merrifield", }, }; static int __init mrfld_pinctrl_init(void) { return platform_driver_register(&mrfld_pinctrl_driver); } subsys_initcall(mrfld_pinctrl_init); static void __exit mrfld_pinctrl_exit(void) { platform_driver_unregister(&mrfld_pinctrl_driver); } module_exit(mrfld_pinctrl_exit); MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>"); MODULE_DESCRIPTION("Intel Merrifield SoC pinctrl driver"); MODULE_LICENSE("GPL v2"); MODULE_ALIAS("platform:pinctrl-merrifield");