diff options
Diffstat (limited to 'drivers/pinctrl/pinctrl-thunderbay.c')
| -rw-r--r-- | drivers/pinctrl/pinctrl-thunderbay.c | 1301 |
1 files changed, 1301 insertions, 0 deletions
diff --git a/drivers/pinctrl/pinctrl-thunderbay.c b/drivers/pinctrl/pinctrl-thunderbay.c new file mode 100644 index 000000000..590bbbf61 --- /dev/null +++ b/drivers/pinctrl/pinctrl-thunderbay.c @@ -0,0 +1,1301 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Intel Thunder Bay SOC pinctrl/GPIO driver + * + * Copyright (C) 2021 Intel Corporation + */ + +#include <linux/device.h> +#include <linux/err.h> +#include <linux/gpio/driver.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/irq.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_irq.h> + +#include <linux/pinctrl/pinconf.h> +#include <linux/pinctrl/pinconf-generic.h> +#include <linux/pinctrl/pinctrl.h> +#include <linux/pinctrl/pinmux.h> + +#include <linux/platform_device.h> +#include <linux/slab.h> +#include <linux/spinlock.h> + +#include "core.h" +#include "pinconf.h" +#include "pinctrl-utils.h" +#include "pinmux.h" + +/* Bit 0:2 and 4:6 should be used for mode selection */ +#define THB_GPIO_PINMUX_MODE_0 0x00 +#define THB_GPIO_PINMUX_MODE_1 0x11 +#define THB_GPIO_PINMUX_MODE_2 0x22 +#define THB_GPIO_PINMUX_MODE_3 0x33 +#define THB_GPIO_PINMUX_MODE_4 0x44 + +#define THB_GPIO_PORT_SELECT_MASK BIT(8) +#define THB_GPIO_PAD_DIRECTION_MASK BIT(10) +#define THB_GPIO_SPU_MASK BIT(11) +#define THB_GPIO_PULL_ENABLE_MASK BIT(12) +#define THB_GPIO_PULL_UP_MASK BIT(13) +#define THB_GPIO_PULL_DOWN_MASK BIT(14) +#define THB_GPIO_ENAQ_MASK BIT(15) +/* bit 16-19: Drive Strength for the Pad */ +#define THB_GPIO_DRIVE_STRENGTH_MASK (0xF0000) +#define THB_GPIO_SLEW_RATE_MASK BIT(20) +#define THB_GPIO_SCHMITT_TRIGGER_MASK BIT(21) + +#define THB_GPIO_REG_OFFSET(pin_num) ((pin_num) * (0x4)) +#define THB_MAX_MODE_SUPPORTED (5u) +#define THB_MAX_NPINS_SUPPORTED (67u) + +/* store Pin status */ +static u32 thb_pinx_status[THB_MAX_NPINS_SUPPORTED]; + +struct thunderbay_mux_desc { + u8 mode; + const char *name; +}; + +#define THUNDERBAY_PIN_DESC(pin_number, pin_name, ...) { \ + .number = pin_number, \ + .name = pin_name, \ + .drv_data = &(struct thunderbay_mux_desc[]) { \ + __VA_ARGS__, { } }, \ +} + +#define THUNDERBAY_MUX(pin_mode, pin_function) { \ + .mode = pin_mode, \ + .name = pin_function, \ +} + +struct thunderbay_pin_soc { + const struct pinctrl_pin_desc *pins; + unsigned int npins; +}; + +/** + * struct thunderbay_pinctrl - Intel Thunderbay pinctrl structure + * @pctrl: Pointer to the pin controller device + * @base0: First register base address + * @dev: Pointer to the device structure + * @chip: GPIO chip used by this pin controller + * @soc: Pin control configuration data based on SoC + * @ngroups: Number of pin groups available + * @nfuncs: Number of pin functions available + */ +struct thunderbay_pinctrl { + struct pinctrl_dev *pctrl; + void __iomem *base0; + struct device *dev; + struct gpio_chip chip; + const struct thunderbay_pin_soc *soc; + unsigned int ngroups; + unsigned int nfuncs; +}; + +static const struct pinctrl_pin_desc thunderbay_pins[] = { + THUNDERBAY_PIN_DESC(0, "GPIO0", + THUNDERBAY_MUX(0X0, "I2C0_M0"), + THUNDERBAY_MUX(0X1, "EMPTY_M1"), + THUNDERBAY_MUX(0X2, "EMPTY_M2"), + THUNDERBAY_MUX(0X3, "EMPTY_M3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(1, "GPIO1", + THUNDERBAY_MUX(0X0, "I2C0_M0"), + THUNDERBAY_MUX(0X1, "EMPTY_M1"), + THUNDERBAY_MUX(0X2, "EMPTY_M2"), + THUNDERBAY_MUX(0X3, "EMPTY_M3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(2, "GPIO2", + THUNDERBAY_MUX(0X0, "I2C1_M0"), + THUNDERBAY_MUX(0X1, "EMPTY_M1"), + THUNDERBAY_MUX(0X2, "EMPTY_M2"), + THUNDERBAY_MUX(0X3, "EMPTY_M3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(3, "GPIO3", + THUNDERBAY_MUX(0X0, "I2C1_M0"), + THUNDERBAY_MUX(0X1, "EMPTY_M1"), + THUNDERBAY_MUX(0X2, "EMPTY_M2"), + THUNDERBAY_MUX(0X3, "EMPTY_M3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(4, "GPIO4", + THUNDERBAY_MUX(0X0, "I2C2_M0"), + THUNDERBAY_MUX(0X1, "EMPTY_M1"), + THUNDERBAY_MUX(0X2, "EMPTY_M2"), + THUNDERBAY_MUX(0X3, "EMPTY_M3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(5, "GPIO5", + THUNDERBAY_MUX(0X0, "I2C2_M0"), + THUNDERBAY_MUX(0X1, "EMPTY_M1"), + THUNDERBAY_MUX(0X2, "EMPTY_M2"), + THUNDERBAY_MUX(0X3, "EMPTY_M3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(6, "GPIO6", + THUNDERBAY_MUX(0X0, "I2C3_M0"), + THUNDERBAY_MUX(0X1, "EMPTY_M1"), + THUNDERBAY_MUX(0X2, "EMPTY_M2"), + THUNDERBAY_MUX(0X3, "EMPTY_M3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(7, "GPIO7", + THUNDERBAY_MUX(0X0, "I2C3_M0"), + THUNDERBAY_MUX(0X1, "EMPTY_M1"), + THUNDERBAY_MUX(0X2, "EMPTY_M2"), + THUNDERBAY_MUX(0X3, "EMPTY_M3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(8, "GPIO8", + THUNDERBAY_MUX(0X0, "I2C4_M0"), + THUNDERBAY_MUX(0X1, "EMPTY_M1"), + THUNDERBAY_MUX(0X2, "EMPTY_M2"), + THUNDERBAY_MUX(0X3, "EMPTY_M3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(9, "GPIO9", + THUNDERBAY_MUX(0X0, "I2C4_M0"), + THUNDERBAY_MUX(0X1, "EMPTY_M1"), + THUNDERBAY_MUX(0X2, "EMPTY_M2"), + THUNDERBAY_MUX(0X3, "EMPTY_M3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(10, "GPIO10", + THUNDERBAY_MUX(0X0, "UART0_M0"), + THUNDERBAY_MUX(0X1, "RT0_DSU_M1"), + THUNDERBAY_MUX(0X2, "EMPTY_M2"), + THUNDERBAY_MUX(0X3, "EMPTY_M3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(11, "GPIO11", + THUNDERBAY_MUX(0X0, "UART0_M0"), + THUNDERBAY_MUX(0X1, "RT0_DSU_M1"), + THUNDERBAY_MUX(0X2, "EMPTY_M2"), + THUNDERBAY_MUX(0X3, "EMPTY_M3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(12, "GPIO12", + THUNDERBAY_MUX(0X0, "UART0_M0"), + THUNDERBAY_MUX(0X1, "RT1_DSU_M1"), + THUNDERBAY_MUX(0X2, "EMPTY_M2"), + THUNDERBAY_MUX(0X3, "EMPTY_M3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(13, "GPIO13", + THUNDERBAY_MUX(0X0, "UART0_M0"), + THUNDERBAY_MUX(0X1, "RT1_DSU_M1"), + THUNDERBAY_MUX(0X2, "EMPTY_M2"), + THUNDERBAY_MUX(0X3, "EMPTY_M3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(14, "GPIO14", + THUNDERBAY_MUX(0X0, "UART1_M0"), + THUNDERBAY_MUX(0X1, "RT2_DSU_M1"), + THUNDERBAY_MUX(0X2, "EMPTY_M2"), + THUNDERBAY_MUX(0X3, "TRIGGER_M3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(15, "GPIO15", + THUNDERBAY_MUX(0X0, "UART1_M0"), + THUNDERBAY_MUX(0X1, "RT2_DSU_M1"), + THUNDERBAY_MUX(0X2, "EMPTY_M2"), + THUNDERBAY_MUX(0X3, "TRIGGER_M3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(16, "GPIO16", + THUNDERBAY_MUX(0X0, "UART1_M0"), + THUNDERBAY_MUX(0X1, "RT3_DSU_M1"), + THUNDERBAY_MUX(0X2, "EMPTY_M2"), + THUNDERBAY_MUX(0X3, "EMPTY_M3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(17, "GPIO17", + THUNDERBAY_MUX(0X0, "UART1_M0"), + THUNDERBAY_MUX(0X1, "RT3_DSU_M1"), + THUNDERBAY_MUX(0X2, "EMPTY_M2"), + THUNDERBAY_MUX(0X3, "EMPTY_M3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(18, "GPIO18", + THUNDERBAY_MUX(0X0, "SPI0_M0"), + THUNDERBAY_MUX(0X1, "EMPTY_M1"), + THUNDERBAY_MUX(0X2, "EMPTY_M2"), + THUNDERBAY_MUX(0X3, "EMPTY_M3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(19, "GPIO19", + THUNDERBAY_MUX(0X0, "SPI0_M0"), + THUNDERBAY_MUX(0X1, "EMPTY_M1"), + THUNDERBAY_MUX(0X2, "EMPTY_M2"), + THUNDERBAY_MUX(0X3, "EMPTY_M3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(20, "GPIO20", + THUNDERBAY_MUX(0X0, "SPI0_M0"), + THUNDERBAY_MUX(0X1, "EMPTY_M1"), + THUNDERBAY_MUX(0X2, "TPIU_TRACE_M2"), + THUNDERBAY_MUX(0X3, "EMPTY_M3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(21, "GPIO21", + THUNDERBAY_MUX(0X0, "SPI0_M0"), + THUNDERBAY_MUX(0X1, "EMPTY_M1"), + THUNDERBAY_MUX(0X2, "TPIU_TRACE_M2"), + THUNDERBAY_MUX(0X3, "EMPTY_M3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(22, "GPIO22", + THUNDERBAY_MUX(0X0, "SPI1_M0"), + THUNDERBAY_MUX(0X1, "EMPTY_M0"), + THUNDERBAY_MUX(0X2, "EMPTY_M2"), + THUNDERBAY_MUX(0X3, "EMPTY_M3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(23, "GPIO23", + THUNDERBAY_MUX(0X0, "SPI1_M0"), + THUNDERBAY_MUX(0X1, "EMPTY_M1"), + THUNDERBAY_MUX(0X2, "EMPTY_M2"), + THUNDERBAY_MUX(0X3, "EMPTY_M3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(24, "GPIO24", + THUNDERBAY_MUX(0X0, "SPI1_M0"), + THUNDERBAY_MUX(0X1, "TPIU_TRACE_M1"), + THUNDERBAY_MUX(0X2, "EMPTY_M2"), + THUNDERBAY_MUX(0X3, "EMPTY_M3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(25, "GPIO25", + THUNDERBAY_MUX(0X0, "SPI1_M0"), + THUNDERBAY_MUX(0X1, "TPIU_TRACE_M1"), + THUNDERBAY_MUX(0X2, "EMPTY_M2"), + THUNDERBAY_MUX(0X3, "EMPTY_M3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(26, "GPIO26", + THUNDERBAY_MUX(0X0, "ETHER0_M0"), + THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"), + THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"), + THUNDERBAY_MUX(0X3, "DEBUG_M3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(27, "GPIO27", + THUNDERBAY_MUX(0X0, "ETHER0_M0"), + THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"), + THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"), + THUNDERBAY_MUX(0X3, "DEBUG_M3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(28, "GPIO28", + THUNDERBAY_MUX(0X0, "ETHER0_M0"), + THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"), + THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"), + THUNDERBAY_MUX(0X3, "DEBUG_M3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(29, "GPIO29", + THUNDERBAY_MUX(0X0, "ETHER0_M0"), + THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"), + THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"), + THUNDERBAY_MUX(0X3, "DEBUG_M3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(30, "GPIO30", + THUNDERBAY_MUX(0X0, "ETHER0_M0"), + THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"), + THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"), + THUNDERBAY_MUX(0X3, "DEBUG_M3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(31, "GPIO31", + THUNDERBAY_MUX(0X0, "ETHER0_M0"), + THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"), + THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"), + THUNDERBAY_MUX(0X3, "DEBUG_M3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(32, "GPIO32", + THUNDERBAY_MUX(0X0, "ETHER0_M0"), + THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"), + THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"), + THUNDERBAY_MUX(0X3, "DEBUG_M3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(33, "GPIO33", + THUNDERBAY_MUX(0X0, "ETHER0_M0"), + THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"), + THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"), + THUNDERBAY_MUX(0X3, "DEBUG_M3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(34, "GPIO34", + THUNDERBAY_MUX(0X0, "ETHER0_M0"), + THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"), + THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"), + THUNDERBAY_MUX(0X3, "DIG_VIEW_0"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(35, "GPIO35", + THUNDERBAY_MUX(0X0, "ETHER0_M0"), + THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"), + THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"), + THUNDERBAY_MUX(0X3, "DIG_VIEW_1"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(36, "GPIO36", + THUNDERBAY_MUX(0X0, "ETHER0_M0"), + THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"), + THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"), + THUNDERBAY_MUX(0X3, "CPR_IO_OUT_CLK_0"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(37, "GPIO37", + THUNDERBAY_MUX(0X0, "ETHER0_M0"), + THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"), + THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"), + THUNDERBAY_MUX(0X3, "CPR_IO_OUT_CLK_1"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(38, "GPIO38", + THUNDERBAY_MUX(0X0, "ETHER0_M0"), + THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"), + THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"), + THUNDERBAY_MUX(0X3, "CPR_IO_OUT_CLK_2"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(39, "GPIO39", + THUNDERBAY_MUX(0X0, "ETHER0_M0"), + THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"), + THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"), + THUNDERBAY_MUX(0X3, "CPR_IO_OUT_CLK_3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(40, "GPIO40", + THUNDERBAY_MUX(0X0, "ETHER0_M0"), + THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"), + THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"), + THUNDERBAY_MUX(0X3, "EMPTY_M3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(41, "GPIO41", + THUNDERBAY_MUX(0X0, "POWER_INTERRUPT_MAX_PLATFORM_POWER_M0"), + THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"), + THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"), + THUNDERBAY_MUX(0X3, "EMPTY_M3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(42, "GPIO42", + THUNDERBAY_MUX(0X0, "ETHER1_M0"), + THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"), + THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"), + THUNDERBAY_MUX(0X3, "DEBUG_M3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(43, "GPIO43", + THUNDERBAY_MUX(0X0, "ETHER1_M0"), + THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"), + THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"), + THUNDERBAY_MUX(0X3, "DEBUG_M3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(44, "GPIO44", + THUNDERBAY_MUX(0X0, "ETHER1_M0"), + THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"), + THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"), + THUNDERBAY_MUX(0X3, "DEBUG_M3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(45, "GPIO45", + THUNDERBAY_MUX(0X0, "ETHER1_M0"), + THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"), + THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"), + THUNDERBAY_MUX(0X3, "DEBUG_M3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(46, "GPIO46", + THUNDERBAY_MUX(0X0, "ETHER1_M0"), + THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"), + THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"), + THUNDERBAY_MUX(0X3, "DEBUG_M3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(47, "GPIO47", + THUNDERBAY_MUX(0X0, "ETHER1_M0"), + THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"), + THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"), + THUNDERBAY_MUX(0X3, "DEBUG_M3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(48, "GPIO48", + THUNDERBAY_MUX(0X0, "ETHER1_M0"), + THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"), + THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"), + THUNDERBAY_MUX(0X3, "DEBUG_M3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(49, "GPIO49", + THUNDERBAY_MUX(0X0, "ETHER1_M0"), + THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"), + THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"), + THUNDERBAY_MUX(0X3, "DEBUG_M3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(50, "GPIO50", + THUNDERBAY_MUX(0X0, "ETHER1_M0"), + THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"), + THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"), + THUNDERBAY_MUX(0X3, "DIG_VIEW_0"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(51, "GPIO51", + THUNDERBAY_MUX(0X0, "ETHER1_M0"), + THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"), + THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"), + THUNDERBAY_MUX(0X3, "DIG_VIEW_1"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(52, "GPIO52", + THUNDERBAY_MUX(0X0, "ETHER1_M0"), + THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"), + THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"), + THUNDERBAY_MUX(0X3, "CPR_IO_OUT_CLK_0"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(53, "GPIO53", + THUNDERBAY_MUX(0X0, "ETHER1_M0"), + THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"), + THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"), + THUNDERBAY_MUX(0X3, "CPR_IO_OUT_CLK_1"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(54, "GPIO54", + THUNDERBAY_MUX(0X0, "ETHER1_M0"), + THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"), + THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"), + THUNDERBAY_MUX(0X3, "CPR_IO_OUT_CLK_2"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(55, "GPIO55", + THUNDERBAY_MUX(0X0, "ETHER1_M0"), + THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"), + THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"), + THUNDERBAY_MUX(0X3, "CPR_IO_OUT_CLK_3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(56, "GPIO56", + THUNDERBAY_MUX(0X0, "ETHER1_M0"), + THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"), + THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"), + THUNDERBAY_MUX(0X3, "POWER_INTERRUPT_ICCMAX_VDDD_M3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(57, "GPIO57", + THUNDERBAY_MUX(0X0, "POWER_INTERRUPT_ICCMAX_VPU_M0"), + THUNDERBAY_MUX(0X1, "TPIU_DATA_M1"), + THUNDERBAY_MUX(0X2, "TPIU_DATA_M2"), + THUNDERBAY_MUX(0X3, "EMPTY_M3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(58, "GPIO58", + THUNDERBAY_MUX(0X0, "THERMTRIP_M0"), + THUNDERBAY_MUX(0X1, "EMPTY_M1"), + THUNDERBAY_MUX(0X2, "EMPTY_M2"), + THUNDERBAY_MUX(0X3, "EMPTY_M3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(59, "GPIO59", + THUNDERBAY_MUX(0X0, "THERMTRIP_M0"), + THUNDERBAY_MUX(0X1, "EMPTY_M1"), + THUNDERBAY_MUX(0X2, "EMPTY_M2"), + THUNDERBAY_MUX(0X3, "EMPTY_M3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(60, "GPIO60", + THUNDERBAY_MUX(0X0, "SMBUS_M0"), + THUNDERBAY_MUX(0X1, "EMPTY_M1"), + THUNDERBAY_MUX(0X2, "EMPTY_M2"), + THUNDERBAY_MUX(0X3, "EMPTY_M3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(61, "GPIO61", + THUNDERBAY_MUX(0X0, "SMBUS_M0"), + THUNDERBAY_MUX(0X1, "EMPTY_M1"), + THUNDERBAY_MUX(0X2, "EMPTY_M2"), + THUNDERBAY_MUX(0X3, "POWER_INTERRUPT_ICCMAX_VDDD_M3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(62, "GPIO62", + THUNDERBAY_MUX(0X0, "PLATFORM_RESET_M0"), + THUNDERBAY_MUX(0X1, "EMPTY_M1"), + THUNDERBAY_MUX(0X2, "EMPTY_M2"), + THUNDERBAY_MUX(0X3, "EMPTY_M3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(63, "GPIO63", + THUNDERBAY_MUX(0X0, "PLATFORM_RESET_M0"), + THUNDERBAY_MUX(0X1, "EMPTY_M1"), + THUNDERBAY_MUX(0X2, "EMPTY_M2"), + THUNDERBAY_MUX(0X3, "EMPTY_M3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(64, "GPIO64", + THUNDERBAY_MUX(0X0, "PLATFORM_SHUTDOWN_M0"), + THUNDERBAY_MUX(0X1, "EMPTY_M1"), + THUNDERBAY_MUX(0X2, "EMPTY_M2"), + THUNDERBAY_MUX(0X3, "EMPTY_M3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(65, "GPIO65", + THUNDERBAY_MUX(0X0, "PLATFORM_SHUTDOWN_M0"), + THUNDERBAY_MUX(0X1, "EMPTY_M1"), + THUNDERBAY_MUX(0X2, "EMPTY_M2"), + THUNDERBAY_MUX(0X3, "EMPTY_M3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), + THUNDERBAY_PIN_DESC(66, "GPIO66", + THUNDERBAY_MUX(0X0, "POWER_INTERRUPT_ICCMAX_MEDIA_M0"), + THUNDERBAY_MUX(0X1, "EMPTY_M1"), + THUNDERBAY_MUX(0X2, "EMPTY_M2"), + THUNDERBAY_MUX(0X3, "EMPTY_M3"), + THUNDERBAY_MUX(0X4, "GPIO_M4")), +}; + +static const struct thunderbay_pin_soc thunderbay_data = { + .pins = thunderbay_pins, + .npins = ARRAY_SIZE(thunderbay_pins), +}; + +static u32 thb_gpio_read_reg(struct gpio_chip *chip, unsigned int pinnr) +{ + struct thunderbay_pinctrl *tpc = gpiochip_get_data(chip); + + return readl(tpc->base0 + THB_GPIO_REG_OFFSET(pinnr)); +} + +static u32 thb_gpio_write_reg(struct gpio_chip *chip, unsigned int pinnr, u32 value) +{ + struct thunderbay_pinctrl *tpc = gpiochip_get_data(chip); + + writel(value, (tpc->base0 + THB_GPIO_REG_OFFSET(pinnr))); + return 0; +} + +static int thb_read_gpio_data(struct gpio_chip *chip, unsigned int offset, unsigned int pad_dir) +{ + int data_offset; + u32 data_reg; + + /* as per GPIO Spec = pad_dir 0:input, 1:output */ + data_offset = 0x2000u + (offset / 32); + if (!pad_dir) + data_offset += 4; + data_reg = thb_gpio_read_reg(chip, data_offset); + + return data_reg & BIT(offset % 32); +} + +static int thb_write_gpio_data(struct gpio_chip *chip, unsigned int offset, unsigned int value) +{ + int data_offset; + u32 data_reg; + + data_offset = 0x2000u + (offset / 32); + + data_reg = thb_gpio_read_reg(chip, data_offset); + + if (value > 0) + data_reg |= BIT(offset % 32); + else + data_reg &= ~BIT(offset % 32); + + return thb_gpio_write_reg(chip, data_offset, data_reg); +} + +static int thunderbay_gpio_get_direction(struct gpio_chip *chip, unsigned int offset) +{ + u32 reg = thb_gpio_read_reg(chip, offset); + + /* Return direction only if configured as GPIO else negative error */ + if (reg & THB_GPIO_PORT_SELECT_MASK) + return !(reg & THB_GPIO_PAD_DIRECTION_MASK); + return -EINVAL; +} + +static int thunderbay_gpio_set_direction_input(struct gpio_chip *chip, unsigned int offset) +{ + u32 reg = thb_gpio_read_reg(chip, offset); + + /* set pin as input only if it is GPIO else error */ + if (reg & THB_GPIO_PORT_SELECT_MASK) { + reg &= (~THB_GPIO_PAD_DIRECTION_MASK); + thb_gpio_write_reg(chip, offset, reg); + return 0; + } + return -EINVAL; +} + +static void thunderbay_gpio_set_value(struct gpio_chip *chip, unsigned int offset, int value) +{ + u32 reg = thb_gpio_read_reg(chip, offset); + + /* update pin value only if it is GPIO-output else error */ + if ((reg & THB_GPIO_PORT_SELECT_MASK) && (reg & THB_GPIO_PAD_DIRECTION_MASK)) + thb_write_gpio_data(chip, offset, value); +} + +static int thunderbay_gpio_set_direction_output(struct gpio_chip *chip, + unsigned int offset, int value) +{ + u32 reg = thb_gpio_read_reg(chip, offset); + + /* set pin as output only if it is GPIO else error */ + if (reg & THB_GPIO_PORT_SELECT_MASK) { + reg |= THB_GPIO_PAD_DIRECTION_MASK; + thb_gpio_write_reg(chip, offset, reg); + thunderbay_gpio_set_value(chip, offset, value); + return 0; + } + return -EINVAL; +} + +static int thunderbay_gpio_get_value(struct gpio_chip *chip, unsigned int offset) +{ + u32 reg = thb_gpio_read_reg(chip, offset); + int gpio_dir = 0; + + /* Read pin value only if it is GPIO else error */ + if (reg & THB_GPIO_PORT_SELECT_MASK) { + /* 0=in, 1=out */ + gpio_dir = (reg & THB_GPIO_PAD_DIRECTION_MASK) > 0; + + /* Returns negative value when pin is configured as PORT */ + return thb_read_gpio_data(chip, offset, gpio_dir); + } + return -EINVAL; +} + +static int thunderbay_gpiochip_probe(struct thunderbay_pinctrl *tpc) +{ + struct gpio_chip *chip = &tpc->chip; + int ret; + + chip->label = dev_name(tpc->dev); + chip->parent = tpc->dev; + chip->request = gpiochip_generic_request; + chip->free = gpiochip_generic_free; + chip->get_direction = thunderbay_gpio_get_direction; + chip->direction_input = thunderbay_gpio_set_direction_input; + chip->direction_output = thunderbay_gpio_set_direction_output; + chip->get = thunderbay_gpio_get_value; + chip->set = thunderbay_gpio_set_value; + chip->set_config = gpiochip_generic_config; + /* identifies the first GPIO number handled by this chip; or, + * if negative during registration, requests dynamic ID allocation. + * Please pass -1 as base to let gpiolib select the chip base in all possible cases. + * We want to get rid of the static GPIO number space in the long run. + */ + chip->base = -1; + /* Number of GPIOs handled by this controller; the last GPIO handled is (base + ngpio - 1)*/ + chip->ngpio = THB_MAX_NPINS_SUPPORTED; + + /* Register/add Thunder Bay GPIO chip with Linux framework */ + ret = gpiochip_add_data(chip, tpc); + if (ret) + dev_err(tpc->dev, "Failed to add gpiochip\n"); + return ret; +} + +static int thunderbay_request_gpio(struct pinctrl_dev *pctldev, + struct pinctrl_gpio_range *range, + unsigned int pin) +{ + struct thunderbay_pinctrl *tpc = pinctrl_dev_get_drvdata(pctldev); + struct gpio_chip *chip = &tpc->chip; + u32 reg = 0; + + if (thb_pinx_status[pin] == 0u) { + reg = thb_gpio_read_reg(chip, pin); + /* Updates PIN configuration as GPIO and sets GPIO to MODE-4*/ + reg |= (THB_GPIO_PORT_SELECT_MASK | THB_GPIO_PINMUX_MODE_4); + thb_gpio_write_reg(chip, pin, reg); + + /* update pin status as busy */ + thb_pinx_status[pin] = 1u; + + return 0; + } + return -EINVAL; +} + +static void thunderbay_free_gpio(struct pinctrl_dev *pctldev, + struct pinctrl_gpio_range *range, + unsigned int pin) +{ + struct thunderbay_pinctrl *tpc = pinctrl_dev_get_drvdata(pctldev); + struct gpio_chip *chip = &tpc->chip; + u32 reg = 0; + + if (thb_pinx_status[pin] == 1u) { + reg = thb_gpio_read_reg(chip, pin); + + /* Updates PIN configuration from GPIO to PORT */ + reg &= (~THB_GPIO_PORT_SELECT_MASK); + + /* Change Port/gpio mode to default mode-0 */ + reg &= (~THB_GPIO_PINMUX_MODE_4); + + thb_gpio_write_reg(chip, pin, reg); + + /* update pin status as free */ + thb_pinx_status[pin] = 0u; + } +} + +static int thb_pinctrl_set_mux(struct pinctrl_dev *pctldev, + unsigned int func_select, unsigned int group_select) +{ + struct thunderbay_pinctrl *tpc = pinctrl_dev_get_drvdata(pctldev); + struct gpio_chip *chip = &tpc->chip; + struct function_desc *function; + unsigned int i, pin_mode; + struct group_desc *group; + int ret = -EINVAL; + u32 reg = 0u; + + group = pinctrl_generic_get_group(pctldev, group_select); + if (!group) + return -EINVAL; + + function = pinmux_generic_get_function(pctldev, func_select); + if (!function) + return -EINVAL; + + pin_mode = *(unsigned int *)(function->data); + + /* Change modes for pins in the selected group */ + for (i = 0; i < group->num_pins; i++) { + reg = thb_gpio_read_reg(chip, group->pins[i]); + + switch (pin_mode) { + case 0u: + reg |= THB_GPIO_PINMUX_MODE_0; + break; + case 1u: + reg |= THB_GPIO_PINMUX_MODE_1; + break; + case 2u: + reg |= THB_GPIO_PINMUX_MODE_2; + break; + case 3u: + reg |= THB_GPIO_PINMUX_MODE_3; + break; + case 4u: + reg |= THB_GPIO_PINMUX_MODE_4; + break; + default: + return -EINVAL; + } + + ret = thb_gpio_write_reg(chip, group->pins[i], reg); + if (~ret) { + /* update pin status as busy */ + thb_pinx_status[group->pins[i]] = 1u; + } + } + return ret; +} + +static int thunderbay_build_groups(struct thunderbay_pinctrl *tpc) +{ + struct group_desc *thunderbay_groups; + int i; + + tpc->ngroups = tpc->soc->npins; + thunderbay_groups = devm_kcalloc(tpc->dev, tpc->ngroups, + sizeof(*thunderbay_groups), GFP_KERNEL); + if (!thunderbay_groups) + return -ENOMEM; + + for (i = 0; i < tpc->ngroups; i++) { + struct group_desc *group = thunderbay_groups + i; + const struct pinctrl_pin_desc *pin_info = thunderbay_pins + i; + + group->name = pin_info->name; + group->pins = (int *)&pin_info->number; + pinctrl_generic_add_group(tpc->pctrl, group->name, + group->pins, 1, NULL); + } + return 0; +} + +static int thunderbay_add_functions(struct thunderbay_pinctrl *tpc, struct function_desc *funcs) +{ + int i; + + /* Assign the groups for each function */ + for (i = 0; i < tpc->nfuncs; i++) { + struct function_desc *func = &funcs[i]; + const char **group_names; + unsigned int grp_idx = 0; + int j; + + group_names = devm_kcalloc(tpc->dev, func->num_group_names, + sizeof(*group_names), GFP_KERNEL); + if (!group_names) + return -ENOMEM; + + for (j = 0; j < tpc->soc->npins; j++) { + const struct pinctrl_pin_desc *pin_info = &thunderbay_pins[j]; + struct thunderbay_mux_desc *pin_mux; + + for (pin_mux = pin_info->drv_data; pin_mux->name; pin_mux++) { + if (!strcmp(pin_mux->name, func->name)) + group_names[grp_idx++] = pin_info->name; + } + } + + func->group_names = group_names; + } + + /* Add all functions */ + for (i = 0; i < tpc->nfuncs; i++) { + pinmux_generic_add_function(tpc->pctrl, + funcs[i].name, + funcs[i].group_names, + funcs[i].num_group_names, + funcs[i].data); + } + + return 0; +} + +static int thunderbay_build_functions(struct thunderbay_pinctrl *tpc) +{ + struct function_desc *thunderbay_funcs; + void *ptr; + int pin; + int ret; + + /* + * Allocate maximum possible number of functions. Assume every pin + * being part of 8 (hw maximum) globally unique muxes. + */ + tpc->nfuncs = 0; + thunderbay_funcs = kcalloc(tpc->soc->npins * 8, + sizeof(*thunderbay_funcs), GFP_KERNEL); + if (!thunderbay_funcs) + return -ENOMEM; + + /* Setup 1 function for each unique mux */ + for (pin = 0; pin < tpc->soc->npins; pin++) { + const struct pinctrl_pin_desc *pin_info = thunderbay_pins + pin; + struct thunderbay_mux_desc *pin_mux; + + for (pin_mux = pin_info->drv_data; pin_mux->name; pin_mux++) { + struct function_desc *func; + + /* Check if we already have function for this mux */ + for (func = thunderbay_funcs; func->name; func++) { + if (!strcmp(pin_mux->name, func->name)) { + func->num_group_names++; + break; + } + } + + if (!func->name) { + func->name = pin_mux->name; + func->num_group_names = 1; + func->data = (int *)&pin_mux->mode; + tpc->nfuncs++; + } + } + } + + /* Reallocate memory based on actual number of functions */ + ptr = krealloc(thunderbay_funcs, + tpc->nfuncs * sizeof(*thunderbay_funcs), GFP_KERNEL); + if (!ptr) + return -ENOMEM; + + thunderbay_funcs = ptr; + ret = thunderbay_add_functions(tpc, thunderbay_funcs); + + kfree(thunderbay_funcs); + return ret; +} + +static int thunderbay_pinconf_set_tristate(struct thunderbay_pinctrl *tpc, + unsigned int pin, u32 config) +{ + struct gpio_chip *chip = &tpc->chip; + u32 reg; + + reg = thb_gpio_read_reg(chip, pin); + if (config > 0) + reg |= THB_GPIO_ENAQ_MASK; + else + reg &= ~THB_GPIO_ENAQ_MASK; + + return thb_gpio_write_reg(chip, pin, reg); +} + +static int thunderbay_pinconf_get_tristate(struct thunderbay_pinctrl *tpc, + unsigned int pin, u32 *config) +{ + struct gpio_chip *chip = &tpc->chip; + u32 reg; + + reg = thb_gpio_read_reg(chip, pin); + *config = (reg & THB_GPIO_ENAQ_MASK) > 0; + + return 0; +} + +static int thunderbay_pinconf_set_pulldown(struct thunderbay_pinctrl *tpc, + unsigned int pin, u32 config) +{ + struct gpio_chip *chip = &tpc->chip; + u32 reg; + + reg = thb_gpio_read_reg(chip, pin); + if (config > 0) + reg |= THB_GPIO_PULL_DOWN_MASK; + else + reg &= ~THB_GPIO_PULL_DOWN_MASK; + + return thb_gpio_write_reg(chip, pin, reg); +} + +static int thunderbay_pinconf_get_pulldown(struct thunderbay_pinctrl *tpc, + unsigned int pin, u32 *config) +{ + struct gpio_chip *chip = &tpc->chip; + u32 reg = 0; + + reg = thb_gpio_read_reg(chip, pin); + *config = ((reg & THB_GPIO_PULL_DOWN_MASK) > 0) ? 1 : 0; + + return 0; +} + +static int thunderbay_pinconf_set_pullup(struct thunderbay_pinctrl *tpc, + unsigned int pin, u32 config) +{ + struct gpio_chip *chip = &tpc->chip; + u32 reg; + + reg = thb_gpio_read_reg(chip, pin); + if (config > 0) + reg &= ~THB_GPIO_PULL_UP_MASK; + else + reg |= THB_GPIO_PULL_UP_MASK; + + return thb_gpio_write_reg(chip, pin, reg); +} + +static int thunderbay_pinconf_get_pullup(struct thunderbay_pinctrl *tpc, + unsigned int pin, u32 *config) +{ + struct gpio_chip *chip = &tpc->chip; + u32 reg; + + reg = thb_gpio_read_reg(chip, pin); + *config = ((reg & THB_GPIO_PULL_UP_MASK) == 0) ? 1 : 0; + + return 0; +} + +static int thunderbay_pinconf_set_opendrain(struct thunderbay_pinctrl *tpc, + unsigned int pin, u32 config) +{ + struct gpio_chip *chip = &tpc->chip; + u32 reg; + + reg = thb_gpio_read_reg(chip, pin); + if (config > 0) + reg &= ~THB_GPIO_PULL_ENABLE_MASK; + else + reg |= THB_GPIO_PULL_ENABLE_MASK; + + return thb_gpio_write_reg(chip, pin, reg); +} + +static int thunderbay_pinconf_get_opendrain(struct thunderbay_pinctrl *tpc, + unsigned int pin, u32 *config) +{ + struct gpio_chip *chip = &tpc->chip; + u32 reg; + + reg = thb_gpio_read_reg(chip, pin); + *config = ((reg & THB_GPIO_PULL_ENABLE_MASK) == 0) ? 1 : 0; + + return 0; +} + +static int thunderbay_pinconf_set_pushpull(struct thunderbay_pinctrl *tpc, + unsigned int pin, u32 config) +{ + struct gpio_chip *chip = &tpc->chip; + u32 reg; + + reg = thb_gpio_read_reg(chip, pin); + if (config > 0) + reg |= THB_GPIO_PULL_ENABLE_MASK; + else + reg &= ~THB_GPIO_PULL_ENABLE_MASK; + + return thb_gpio_write_reg(chip, pin, reg); +} + +static int thunderbay_pinconf_get_pushpull(struct thunderbay_pinctrl *tpc, + unsigned int pin, u32 *config) +{ + struct gpio_chip *chip = &tpc->chip; + u32 reg; + + reg = thb_gpio_read_reg(chip, pin); + *config = ((reg & THB_GPIO_PULL_ENABLE_MASK) > 0) ? 1 : 0; + + return 0; +} + +static int thunderbay_pinconf_set_drivestrength(struct thunderbay_pinctrl *tpc, + unsigned int pin, u32 config) +{ + struct gpio_chip *chip = &tpc->chip; + u32 reg; + + reg = thb_gpio_read_reg(chip, pin); + + /* Drive Strength: 0x0 to 0xF */ + if (config <= 0xF) { + reg = (reg | config); + return thb_gpio_write_reg(chip, pin, reg); + } + + return -EINVAL; +} + +static int thunderbay_pinconf_get_drivestrength(struct thunderbay_pinctrl *tpc, + unsigned int pin, u32 *config) +{ + struct gpio_chip *chip = &tpc->chip; + u32 reg; + + reg = thb_gpio_read_reg(chip, pin); + reg = (reg & THB_GPIO_DRIVE_STRENGTH_MASK) >> 16; + *config = (reg > 0) ? reg : 0; + + return 0; +} + +static int thunderbay_pinconf_set_schmitt(struct thunderbay_pinctrl *tpc, + unsigned int pin, u32 config) +{ + struct gpio_chip *chip = &tpc->chip; + u32 reg; + + reg = thb_gpio_read_reg(chip, pin); + if (config > 0) + reg |= THB_GPIO_SCHMITT_TRIGGER_MASK; + else + reg &= ~THB_GPIO_SCHMITT_TRIGGER_MASK; + + return thb_gpio_write_reg(chip, pin, reg); +} + +static int thunderbay_pinconf_get_schmitt(struct thunderbay_pinctrl *tpc, + unsigned int pin, u32 *config) +{ + struct gpio_chip *chip = &tpc->chip; + u32 reg; + + reg = thb_gpio_read_reg(chip, pin); + *config = ((reg & THB_GPIO_SCHMITT_TRIGGER_MASK) > 0) ? 1 : 0; + + return 0; +} + +static int thunderbay_pinconf_set_slew_rate(struct thunderbay_pinctrl *tpc, + unsigned int pin, u32 config) +{ + struct gpio_chip *chip = &tpc->chip; + u32 reg = 0; + + reg = thb_gpio_read_reg(chip, pin); + if (config > 0) + reg |= THB_GPIO_SLEW_RATE_MASK; + else + reg &= ~THB_GPIO_SLEW_RATE_MASK; + + return thb_gpio_write_reg(chip, pin, reg); +} + +static int thunderbay_pinconf_get_slew_rate(struct thunderbay_pinctrl *tpc, + unsigned int pin, u32 *config) +{ + struct gpio_chip *chip = &tpc->chip; + u32 reg; + + reg = thb_gpio_read_reg(chip, pin); + *config = ((reg & THB_GPIO_SLEW_RATE_MASK) > 0) ? 1 : 0; + + return 0; +} + +static int thunderbay_pinconf_get(struct pinctrl_dev *pctldev, unsigned int pin, + unsigned long *config) +{ + struct thunderbay_pinctrl *tpc = pinctrl_dev_get_drvdata(pctldev); + enum pin_config_param param = pinconf_to_config_param(*config); + u32 arg; + int ret; + + switch (param) { + case PIN_CONFIG_BIAS_HIGH_IMPEDANCE: + ret = thunderbay_pinconf_get_tristate(tpc, pin, &arg); + break; + + case PIN_CONFIG_BIAS_PULL_DOWN: + ret = thunderbay_pinconf_get_pulldown(tpc, pin, &arg); + break; + + case PIN_CONFIG_BIAS_PULL_UP: + ret = thunderbay_pinconf_get_pullup(tpc, pin, &arg); + break; + + case PIN_CONFIG_DRIVE_OPEN_DRAIN: + ret = thunderbay_pinconf_get_opendrain(tpc, pin, &arg); + break; + + case PIN_CONFIG_DRIVE_PUSH_PULL: + ret = thunderbay_pinconf_get_pushpull(tpc, pin, &arg); + break; + + case PIN_CONFIG_DRIVE_STRENGTH: + ret = thunderbay_pinconf_get_drivestrength(tpc, pin, &arg); + break; + + case PIN_CONFIG_INPUT_SCHMITT_ENABLE: + ret = thunderbay_pinconf_get_schmitt(tpc, pin, &arg); + break; + + case PIN_CONFIG_SLEW_RATE: + ret = thunderbay_pinconf_get_slew_rate(tpc, pin, &arg); + break; + + default: + return -ENOTSUPP; + } + + *config = pinconf_to_config_packed(param, arg); + + return ret; +} + +static int thunderbay_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin, + unsigned long *configs, unsigned int num_configs) +{ + struct thunderbay_pinctrl *tpc = pinctrl_dev_get_drvdata(pctldev); + enum pin_config_param param; + unsigned int pinconf; + int ret = 0; + u32 arg; + + for (pinconf = 0; pinconf < num_configs; pinconf++) { + param = pinconf_to_config_param(configs[pinconf]); + arg = pinconf_to_config_argument(configs[pinconf]); + + switch (param) { + case PIN_CONFIG_BIAS_HIGH_IMPEDANCE: + ret = thunderbay_pinconf_set_tristate(tpc, pin, arg); + break; + + case PIN_CONFIG_BIAS_PULL_DOWN: + ret = thunderbay_pinconf_set_pulldown(tpc, pin, arg); + break; + + case PIN_CONFIG_BIAS_PULL_UP: + ret = thunderbay_pinconf_set_pullup(tpc, pin, arg); + break; + + case PIN_CONFIG_DRIVE_OPEN_DRAIN: + ret = thunderbay_pinconf_set_opendrain(tpc, pin, arg); + break; + + case PIN_CONFIG_DRIVE_PUSH_PULL: + ret = thunderbay_pinconf_set_pushpull(tpc, pin, arg); + break; + + case PIN_CONFIG_DRIVE_STRENGTH: + ret = thunderbay_pinconf_set_drivestrength(tpc, pin, arg); + break; + + case PIN_CONFIG_INPUT_SCHMITT_ENABLE: + ret = thunderbay_pinconf_set_schmitt(tpc, pin, arg); + break; + + case PIN_CONFIG_SLEW_RATE: + ret = thunderbay_pinconf_set_slew_rate(tpc, pin, arg); + break; + + default: + return -ENOTSUPP; + } + } + return ret; +} + +static const struct pinctrl_ops thunderbay_pctlops = { + .get_groups_count = pinctrl_generic_get_group_count, + .get_group_name = pinctrl_generic_get_group_name, + .get_group_pins = pinctrl_generic_get_group_pins, + .dt_node_to_map = pinconf_generic_dt_node_to_map_all, + .dt_free_map = pinconf_generic_dt_free_map, +}; + +static const struct pinmux_ops thunderbay_pmxops = { + .get_functions_count = pinmux_generic_get_function_count, + .get_function_name = pinmux_generic_get_function_name, + .get_function_groups = pinmux_generic_get_function_groups, + .set_mux = thb_pinctrl_set_mux, + .gpio_request_enable = thunderbay_request_gpio, + .gpio_disable_free = thunderbay_free_gpio, +}; + +static const struct pinconf_ops thunderbay_confops = { + .is_generic = true, + .pin_config_get = thunderbay_pinconf_get, + .pin_config_set = thunderbay_pinconf_set, +}; + +static struct pinctrl_desc thunderbay_pinctrl_desc = { + .name = "thunderbay-pinmux", + .pctlops = &thunderbay_pctlops, + .pmxops = &thunderbay_pmxops, + .confops = &thunderbay_confops, + .owner = THIS_MODULE, +}; + +static const struct of_device_id thunderbay_pinctrl_match[] = { + { + .compatible = "intel,thunderbay-pinctrl", + .data = &thunderbay_data + }, + {} +}; + +static int thunderbay_pinctrl_probe(struct platform_device *pdev) +{ + const struct of_device_id *of_id; + struct device *dev = &pdev->dev; + struct thunderbay_pinctrl *tpc; + int ret; + + of_id = of_match_node(thunderbay_pinctrl_match, pdev->dev.of_node); + if (!of_id) + return -ENODEV; + + tpc = devm_kzalloc(dev, sizeof(*tpc), GFP_KERNEL); + if (!tpc) + return -ENOMEM; + + tpc->dev = dev; + tpc->soc = of_id->data; + + tpc->base0 = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(tpc->base0)) + return PTR_ERR(tpc->base0); + + thunderbay_pinctrl_desc.pins = tpc->soc->pins; + thunderbay_pinctrl_desc.npins = tpc->soc->npins; + + /* Register pinctrl */ + tpc->pctrl = devm_pinctrl_register(dev, &thunderbay_pinctrl_desc, tpc); + if (IS_ERR(tpc->pctrl)) + return PTR_ERR(tpc->pctrl); + + /* Setup pinmux groups */ + ret = thunderbay_build_groups(tpc); + if (ret) + return ret; + + /* Setup pinmux functions */ + ret = thunderbay_build_functions(tpc); + if (ret) + return ret; + + /* Setup GPIO */ + ret = thunderbay_gpiochip_probe(tpc); + if (ret < 0) + return ret; + + platform_set_drvdata(pdev, tpc); + + return 0; +} + +static int thunderbay_pinctrl_remove(struct platform_device *pdev) +{ + /* thunderbay_pinctrl_remove function to clear the assigned memory */ + return 0; +} + +static struct platform_driver thunderbay_pinctrl_driver = { + .driver = { + .name = "thunderbay-pinctrl", + .of_match_table = thunderbay_pinctrl_match, + }, + .probe = thunderbay_pinctrl_probe, + .remove = thunderbay_pinctrl_remove, +}; + +builtin_platform_driver(thunderbay_pinctrl_driver); + +MODULE_AUTHOR("Lakshmi Sowjanya D <lakshmi.sowjanya.d@intel.com>"); +MODULE_AUTHOR("Kiran Kumar S <kiran.kumar1.s@intel.com>"); +MODULE_DESCRIPTION("Intel Thunder Bay Pinctrl/GPIO Driver"); +MODULE_LICENSE("GPL v2"); |