diff options
Diffstat (limited to 'drivers/pinctrl/intel/pinctrl-merrifield.c')
| -rw-r--r-- | drivers/pinctrl/intel/pinctrl-merrifield.c | 911 |
1 files changed, 911 insertions, 0 deletions
diff --git a/drivers/pinctrl/intel/pinctrl-merrifield.c b/drivers/pinctrl/intel/pinctrl-merrifield.c new file mode 100644 index 000000000000..eb4990ff26ca --- /dev/null +++ b/drivers/pinctrl/intel/pinctrl-merrifield.c @@ -0,0 +1,911 @@ +/* + * 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/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 const struct pinconf_ops mrfld_pinconf_ops = { + .is_generic = true, + .pin_config_get = mrfld_config_get, + .pin_config_set = mrfld_config_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, + nfamilies * 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"); |