From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- drivers/pinctrl/pinctrl-microchip-sgpio.c | 1015 +++++++++++++++++++++++++++++ 1 file changed, 1015 insertions(+) create mode 100644 drivers/pinctrl/pinctrl-microchip-sgpio.c (limited to 'drivers/pinctrl/pinctrl-microchip-sgpio.c') diff --git a/drivers/pinctrl/pinctrl-microchip-sgpio.c b/drivers/pinctrl/pinctrl-microchip-sgpio.c new file mode 100644 index 000000000..96a20ce94 --- /dev/null +++ b/drivers/pinctrl/pinctrl-microchip-sgpio.c @@ -0,0 +1,1015 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Microsemi/Microchip SoCs serial gpio driver + * + * Author: Lars Povlsen + * + * Copyright (c) 2020 Microchip Technology Inc. and its subsidiaries. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "core.h" +#include "pinconf.h" + +#define SGPIO_BITS_PER_WORD 32 +#define SGPIO_MAX_BITS 4 +#define SGPIO_SRC_BITS 3 /* 3 bit wide field per pin */ + +enum { + REG_INPUT_DATA, + REG_PORT_CONFIG, + REG_PORT_ENABLE, + REG_SIO_CONFIG, + REG_SIO_CLOCK, + REG_INT_POLARITY, + REG_INT_TRIGGER, + REG_INT_ACK, + REG_INT_ENABLE, + REG_INT_IDENT, + MAXREG +}; + +enum { + SGPIO_ARCH_LUTON, + SGPIO_ARCH_OCELOT, + SGPIO_ARCH_SPARX5, +}; + +enum { + SGPIO_FLAGS_HAS_IRQ = BIT(0), +}; + +struct sgpio_properties { + int arch; + int flags; + u8 regoff[MAXREG]; +}; + +#define SGPIO_LUTON_AUTO_REPEAT BIT(5) +#define SGPIO_LUTON_PORT_WIDTH GENMASK(3, 2) +#define SGPIO_LUTON_CLK_FREQ GENMASK(11, 0) +#define SGPIO_LUTON_BIT_SOURCE GENMASK(11, 0) + +#define SGPIO_OCELOT_AUTO_REPEAT BIT(10) +#define SGPIO_OCELOT_SINGLE_SHOT BIT(11) +#define SGPIO_OCELOT_PORT_WIDTH GENMASK(8, 7) +#define SGPIO_OCELOT_CLK_FREQ GENMASK(19, 8) +#define SGPIO_OCELOT_BIT_SOURCE GENMASK(23, 12) + +#define SGPIO_SPARX5_AUTO_REPEAT BIT(6) +#define SGPIO_SPARX5_SINGLE_SHOT BIT(7) +#define SGPIO_SPARX5_PORT_WIDTH GENMASK(4, 3) +#define SGPIO_SPARX5_CLK_FREQ GENMASK(19, 8) +#define SGPIO_SPARX5_BIT_SOURCE GENMASK(23, 12) + +#define SGPIO_MASTER_INTR_ENA BIT(0) + +#define SGPIO_INT_TRG_LEVEL 0 +#define SGPIO_INT_TRG_EDGE 1 +#define SGPIO_INT_TRG_EDGE_FALL 2 +#define SGPIO_INT_TRG_EDGE_RISE 3 + +#define SGPIO_TRG_LEVEL_HIGH 0 +#define SGPIO_TRG_LEVEL_LOW 1 + +static const struct sgpio_properties properties_luton = { + .arch = SGPIO_ARCH_LUTON, + .regoff = { 0x00, 0x09, 0x29, 0x2a, 0x2b }, +}; + +static const struct sgpio_properties properties_ocelot = { + .arch = SGPIO_ARCH_OCELOT, + .regoff = { 0x00, 0x06, 0x26, 0x04, 0x05 }, +}; + +static const struct sgpio_properties properties_sparx5 = { + .arch = SGPIO_ARCH_SPARX5, + .flags = SGPIO_FLAGS_HAS_IRQ, + .regoff = { 0x00, 0x06, 0x26, 0x04, 0x05, 0x2a, 0x32, 0x3a, 0x3e, 0x42 }, +}; + +static const char * const functions[] = { "gpio" }; + +struct sgpio_bank { + struct sgpio_priv *priv; + bool is_input; + struct gpio_chip gpio; + struct pinctrl_desc pctl_desc; +}; + +struct sgpio_priv { + struct device *dev; + struct sgpio_bank in; + struct sgpio_bank out; + u32 bitcount; + u32 ports; + u32 clock; + struct regmap *regs; + const struct sgpio_properties *properties; + spinlock_t lock; + /* protects the config register and single shot mode */ + struct mutex poll_lock; +}; + +struct sgpio_port_addr { + u8 port; + u8 bit; +}; + +static inline void sgpio_pin_to_addr(struct sgpio_priv *priv, int pin, + struct sgpio_port_addr *addr) +{ + addr->port = pin / priv->bitcount; + addr->bit = pin % priv->bitcount; +} + +static inline int sgpio_addr_to_pin(struct sgpio_priv *priv, int port, int bit) +{ + return bit + port * priv->bitcount; +} + +static inline u32 sgpio_get_addr(struct sgpio_priv *priv, u32 rno, u32 off) +{ + return (priv->properties->regoff[rno] + off) * + regmap_get_reg_stride(priv->regs); +} + +static u32 sgpio_readl(struct sgpio_priv *priv, u32 rno, u32 off) +{ + u32 addr = sgpio_get_addr(priv, rno, off); + u32 val = 0; + int ret; + + ret = regmap_read(priv->regs, addr, &val); + WARN_ONCE(ret, "error reading sgpio reg %d\n", ret); + + return val; +} + +static void sgpio_writel(struct sgpio_priv *priv, + u32 val, u32 rno, u32 off) +{ + u32 addr = sgpio_get_addr(priv, rno, off); + int ret; + + ret = regmap_write(priv->regs, addr, val); + WARN_ONCE(ret, "error writing sgpio reg %d\n", ret); +} + +static inline void sgpio_clrsetbits(struct sgpio_priv *priv, + u32 rno, u32 off, u32 clear, u32 set) +{ + u32 addr = sgpio_get_addr(priv, rno, off); + int ret; + + ret = regmap_update_bits(priv->regs, addr, clear | set, set); + WARN_ONCE(ret, "error updating sgpio reg %d\n", ret); +} + +static inline void sgpio_configure_bitstream(struct sgpio_priv *priv) +{ + int width = priv->bitcount - 1; + u32 clr, set; + + switch (priv->properties->arch) { + case SGPIO_ARCH_LUTON: + clr = SGPIO_LUTON_PORT_WIDTH; + set = SGPIO_LUTON_AUTO_REPEAT | + FIELD_PREP(SGPIO_LUTON_PORT_WIDTH, width); + break; + case SGPIO_ARCH_OCELOT: + clr = SGPIO_OCELOT_PORT_WIDTH; + set = SGPIO_OCELOT_AUTO_REPEAT | + FIELD_PREP(SGPIO_OCELOT_PORT_WIDTH, width); + break; + case SGPIO_ARCH_SPARX5: + clr = SGPIO_SPARX5_PORT_WIDTH; + set = SGPIO_SPARX5_AUTO_REPEAT | + FIELD_PREP(SGPIO_SPARX5_PORT_WIDTH, width); + break; + default: + return; + } + sgpio_clrsetbits(priv, REG_SIO_CONFIG, 0, clr, set); +} + +static inline void sgpio_configure_clock(struct sgpio_priv *priv, u32 clkfrq) +{ + u32 clr, set; + + switch (priv->properties->arch) { + case SGPIO_ARCH_LUTON: + clr = SGPIO_LUTON_CLK_FREQ; + set = FIELD_PREP(SGPIO_LUTON_CLK_FREQ, clkfrq); + break; + case SGPIO_ARCH_OCELOT: + clr = SGPIO_OCELOT_CLK_FREQ; + set = FIELD_PREP(SGPIO_OCELOT_CLK_FREQ, clkfrq); + break; + case SGPIO_ARCH_SPARX5: + clr = SGPIO_SPARX5_CLK_FREQ; + set = FIELD_PREP(SGPIO_SPARX5_CLK_FREQ, clkfrq); + break; + default: + return; + } + sgpio_clrsetbits(priv, REG_SIO_CLOCK, 0, clr, set); +} + +static int sgpio_single_shot(struct sgpio_priv *priv) +{ + u32 addr = sgpio_get_addr(priv, REG_SIO_CONFIG, 0); + int ret, ret2; + u32 ctrl; + unsigned int single_shot; + unsigned int auto_repeat; + + switch (priv->properties->arch) { + case SGPIO_ARCH_LUTON: + /* not supported for now */ + return 0; + case SGPIO_ARCH_OCELOT: + single_shot = SGPIO_OCELOT_SINGLE_SHOT; + auto_repeat = SGPIO_OCELOT_AUTO_REPEAT; + break; + case SGPIO_ARCH_SPARX5: + single_shot = SGPIO_SPARX5_SINGLE_SHOT; + auto_repeat = SGPIO_SPARX5_AUTO_REPEAT; + break; + default: + return -EINVAL; + } + + /* + * Trigger immediate burst. This only works when auto repeat is turned + * off. Otherwise, the single shot bit will never be cleared by the + * hardware. Measurements showed that an update might take as long as + * the burst gap. On a LAN9668 this is about 50ms for the largest + * setting. + * After the manual burst, reenable the auto repeat mode again. + */ + mutex_lock(&priv->poll_lock); + ret = regmap_update_bits(priv->regs, addr, single_shot | auto_repeat, + single_shot); + if (ret) + goto out; + + ret = regmap_read_poll_timeout(priv->regs, addr, ctrl, + !(ctrl & single_shot), 100, 60000); + + /* reenable auto repeat mode even if there was an error */ + ret2 = regmap_update_bits(priv->regs, addr, auto_repeat, auto_repeat); +out: + mutex_unlock(&priv->poll_lock); + + return ret ?: ret2; +} + +static int sgpio_output_set(struct sgpio_priv *priv, + struct sgpio_port_addr *addr, + int value) +{ + unsigned int bit = SGPIO_SRC_BITS * addr->bit; + u32 reg = sgpio_get_addr(priv, REG_PORT_CONFIG, addr->port); + bool changed; + u32 clr, set; + int ret; + + switch (priv->properties->arch) { + case SGPIO_ARCH_LUTON: + clr = FIELD_PREP(SGPIO_LUTON_BIT_SOURCE, BIT(bit)); + set = FIELD_PREP(SGPIO_LUTON_BIT_SOURCE, value << bit); + break; + case SGPIO_ARCH_OCELOT: + clr = FIELD_PREP(SGPIO_OCELOT_BIT_SOURCE, BIT(bit)); + set = FIELD_PREP(SGPIO_OCELOT_BIT_SOURCE, value << bit); + break; + case SGPIO_ARCH_SPARX5: + clr = FIELD_PREP(SGPIO_SPARX5_BIT_SOURCE, BIT(bit)); + set = FIELD_PREP(SGPIO_SPARX5_BIT_SOURCE, value << bit); + break; + default: + return -EINVAL; + } + + ret = regmap_update_bits_check(priv->regs, reg, clr | set, set, + &changed); + if (ret) + return ret; + + if (changed) { + ret = sgpio_single_shot(priv); + if (ret) + return ret; + } + + return 0; +} + +static int sgpio_output_get(struct sgpio_priv *priv, + struct sgpio_port_addr *addr) +{ + u32 val, portval = sgpio_readl(priv, REG_PORT_CONFIG, addr->port); + unsigned int bit = SGPIO_SRC_BITS * addr->bit; + + switch (priv->properties->arch) { + case SGPIO_ARCH_LUTON: + val = FIELD_GET(SGPIO_LUTON_BIT_SOURCE, portval); + break; + case SGPIO_ARCH_OCELOT: + val = FIELD_GET(SGPIO_OCELOT_BIT_SOURCE, portval); + break; + case SGPIO_ARCH_SPARX5: + val = FIELD_GET(SGPIO_SPARX5_BIT_SOURCE, portval); + break; + default: + val = 0; + break; + } + return !!(val & BIT(bit)); +} + +static int sgpio_input_get(struct sgpio_priv *priv, + struct sgpio_port_addr *addr) +{ + return !!(sgpio_readl(priv, REG_INPUT_DATA, addr->bit) & BIT(addr->port)); +} + +static int sgpio_pinconf_get(struct pinctrl_dev *pctldev, + unsigned int pin, unsigned long *config) +{ + struct sgpio_bank *bank = pinctrl_dev_get_drvdata(pctldev); + u32 param = pinconf_to_config_param(*config); + struct sgpio_priv *priv = bank->priv; + struct sgpio_port_addr addr; + int val; + + sgpio_pin_to_addr(priv, pin, &addr); + + switch (param) { + case PIN_CONFIG_INPUT_ENABLE: + val = bank->is_input; + break; + + case PIN_CONFIG_OUTPUT_ENABLE: + val = !bank->is_input; + break; + + case PIN_CONFIG_OUTPUT: + if (bank->is_input) + return -EINVAL; + val = sgpio_output_get(priv, &addr); + break; + + default: + return -ENOTSUPP; + } + + *config = pinconf_to_config_packed(param, val); + + return 0; +} + +static int sgpio_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin, + unsigned long *configs, unsigned int num_configs) +{ + struct sgpio_bank *bank = pinctrl_dev_get_drvdata(pctldev); + struct sgpio_priv *priv = bank->priv; + struct sgpio_port_addr addr; + int cfg, err = 0; + u32 param, arg; + + sgpio_pin_to_addr(priv, pin, &addr); + + for (cfg = 0; cfg < num_configs; cfg++) { + param = pinconf_to_config_param(configs[cfg]); + arg = pinconf_to_config_argument(configs[cfg]); + + switch (param) { + case PIN_CONFIG_OUTPUT: + if (bank->is_input) + return -EINVAL; + err = sgpio_output_set(priv, &addr, arg); + break; + + default: + err = -ENOTSUPP; + } + } + + return err; +} + +static const struct pinconf_ops sgpio_confops = { + .is_generic = true, + .pin_config_get = sgpio_pinconf_get, + .pin_config_set = sgpio_pinconf_set, + .pin_config_config_dbg_show = pinconf_generic_dump_config, +}; + +static int sgpio_get_functions_count(struct pinctrl_dev *pctldev) +{ + return 1; +} + +static const char *sgpio_get_function_name(struct pinctrl_dev *pctldev, + unsigned int function) +{ + return functions[0]; +} + +static int sgpio_get_function_groups(struct pinctrl_dev *pctldev, + unsigned int function, + const char *const **groups, + unsigned *const num_groups) +{ + *groups = functions; + *num_groups = ARRAY_SIZE(functions); + + return 0; +} + +static int sgpio_pinmux_set_mux(struct pinctrl_dev *pctldev, + unsigned int selector, unsigned int group) +{ + return 0; +} + +static int sgpio_gpio_set_direction(struct pinctrl_dev *pctldev, + struct pinctrl_gpio_range *range, + unsigned int pin, bool input) +{ + struct sgpio_bank *bank = pinctrl_dev_get_drvdata(pctldev); + + return (input == bank->is_input) ? 0 : -EINVAL; +} + +static int sgpio_gpio_request_enable(struct pinctrl_dev *pctldev, + struct pinctrl_gpio_range *range, + unsigned int offset) +{ + struct sgpio_bank *bank = pinctrl_dev_get_drvdata(pctldev); + struct sgpio_priv *priv = bank->priv; + struct sgpio_port_addr addr; + + sgpio_pin_to_addr(priv, offset, &addr); + + if ((priv->ports & BIT(addr.port)) == 0) { + dev_warn(priv->dev, "Request port %d.%d: Port is not enabled\n", + addr.port, addr.bit); + return -EINVAL; + } + + return 0; +} + +static const struct pinmux_ops sgpio_pmx_ops = { + .get_functions_count = sgpio_get_functions_count, + .get_function_name = sgpio_get_function_name, + .get_function_groups = sgpio_get_function_groups, + .set_mux = sgpio_pinmux_set_mux, + .gpio_set_direction = sgpio_gpio_set_direction, + .gpio_request_enable = sgpio_gpio_request_enable, +}; + +static int sgpio_pctl_get_groups_count(struct pinctrl_dev *pctldev) +{ + struct sgpio_bank *bank = pinctrl_dev_get_drvdata(pctldev); + + return bank->pctl_desc.npins; +} + +static const char *sgpio_pctl_get_group_name(struct pinctrl_dev *pctldev, + unsigned int group) +{ + struct sgpio_bank *bank = pinctrl_dev_get_drvdata(pctldev); + + return bank->pctl_desc.pins[group].name; +} + +static int sgpio_pctl_get_group_pins(struct pinctrl_dev *pctldev, + unsigned int group, + const unsigned int **pins, + unsigned int *num_pins) +{ + struct sgpio_bank *bank = pinctrl_dev_get_drvdata(pctldev); + + *pins = &bank->pctl_desc.pins[group].number; + *num_pins = 1; + + return 0; +} + +static const struct pinctrl_ops sgpio_pctl_ops = { + .get_groups_count = sgpio_pctl_get_groups_count, + .get_group_name = sgpio_pctl_get_group_name, + .get_group_pins = sgpio_pctl_get_group_pins, + .dt_node_to_map = pinconf_generic_dt_node_to_map_pin, + .dt_free_map = pinconf_generic_dt_free_map, +}; + +static int microchip_sgpio_direction_input(struct gpio_chip *gc, unsigned int gpio) +{ + struct sgpio_bank *bank = gpiochip_get_data(gc); + + /* Fixed-position function */ + return bank->is_input ? 0 : -EINVAL; +} + +static int microchip_sgpio_direction_output(struct gpio_chip *gc, + unsigned int gpio, int value) +{ + struct sgpio_bank *bank = gpiochip_get_data(gc); + struct sgpio_priv *priv = bank->priv; + struct sgpio_port_addr addr; + + /* Fixed-position function */ + if (bank->is_input) + return -EINVAL; + + sgpio_pin_to_addr(priv, gpio, &addr); + + return sgpio_output_set(priv, &addr, value); +} + +static int microchip_sgpio_get_direction(struct gpio_chip *gc, unsigned int gpio) +{ + struct sgpio_bank *bank = gpiochip_get_data(gc); + + return bank->is_input ? GPIO_LINE_DIRECTION_IN : GPIO_LINE_DIRECTION_OUT; +} + +static void microchip_sgpio_set_value(struct gpio_chip *gc, + unsigned int gpio, int value) +{ + microchip_sgpio_direction_output(gc, gpio, value); +} + +static int microchip_sgpio_get_value(struct gpio_chip *gc, unsigned int gpio) +{ + struct sgpio_bank *bank = gpiochip_get_data(gc); + struct sgpio_priv *priv = bank->priv; + struct sgpio_port_addr addr; + + sgpio_pin_to_addr(priv, gpio, &addr); + + return bank->is_input ? sgpio_input_get(priv, &addr) : sgpio_output_get(priv, &addr); +} + +static int microchip_sgpio_of_xlate(struct gpio_chip *gc, + const struct of_phandle_args *gpiospec, + u32 *flags) +{ + struct sgpio_bank *bank = gpiochip_get_data(gc); + struct sgpio_priv *priv = bank->priv; + int pin; + + /* + * Note that the SGIO pin is defined by *2* numbers, a port + * number between 0 and 31, and a bit index, 0 to 3. + */ + if (gpiospec->args[0] > SGPIO_BITS_PER_WORD || + gpiospec->args[1] > priv->bitcount) + return -EINVAL; + + pin = sgpio_addr_to_pin(priv, gpiospec->args[0], gpiospec->args[1]); + + if (pin > gc->ngpio) + return -EINVAL; + + if (flags) + *flags = gpiospec->args[2]; + + return pin; +} + +static int microchip_sgpio_get_ports(struct sgpio_priv *priv) +{ + const char *range_property_name = "microchip,sgpio-port-ranges"; + struct device *dev = priv->dev; + u32 range_params[64]; + int i, nranges, ret; + + /* Calculate port mask */ + nranges = device_property_count_u32(dev, range_property_name); + if (nranges < 2 || nranges % 2 || nranges > ARRAY_SIZE(range_params)) { + dev_err(dev, "%s port range: '%s' property\n", + nranges == -EINVAL ? "Missing" : "Invalid", + range_property_name); + return -EINVAL; + } + + ret = device_property_read_u32_array(dev, range_property_name, + range_params, nranges); + if (ret) { + dev_err(dev, "failed to parse '%s' property: %d\n", + range_property_name, ret); + return ret; + } + for (i = 0; i < nranges; i += 2) { + int start, end; + + start = range_params[i]; + end = range_params[i + 1]; + if (start > end || end >= SGPIO_BITS_PER_WORD) { + dev_err(dev, "Ill-formed port-range [%d:%d]\n", + start, end); + } + priv->ports |= GENMASK(end, start); + } + + return 0; +} + +static void microchip_sgpio_irq_settype(struct irq_data *data, + int type, + int polarity) +{ + struct gpio_chip *chip = irq_data_get_irq_chip_data(data); + struct sgpio_bank *bank = gpiochip_get_data(chip); + unsigned int gpio = irqd_to_hwirq(data); + struct sgpio_port_addr addr; + unsigned long flags; + u32 ena; + + sgpio_pin_to_addr(bank->priv, gpio, &addr); + + spin_lock_irqsave(&bank->priv->lock, flags); + + /* Disable interrupt while changing type */ + ena = sgpio_readl(bank->priv, REG_INT_ENABLE, addr.bit); + sgpio_writel(bank->priv, ena & ~BIT(addr.port), REG_INT_ENABLE, addr.bit); + + /* Type value spread over 2 registers sets: low, high bit */ + sgpio_clrsetbits(bank->priv, REG_INT_TRIGGER, addr.bit, + BIT(addr.port), (!!(type & 0x1)) << addr.port); + sgpio_clrsetbits(bank->priv, REG_INT_TRIGGER, SGPIO_MAX_BITS + addr.bit, + BIT(addr.port), (!!(type & 0x2)) << addr.port); + + if (type == SGPIO_INT_TRG_LEVEL) + sgpio_clrsetbits(bank->priv, REG_INT_POLARITY, addr.bit, + BIT(addr.port), polarity << addr.port); + + /* Possibly re-enable interrupts */ + sgpio_writel(bank->priv, ena, REG_INT_ENABLE, addr.bit); + + spin_unlock_irqrestore(&bank->priv->lock, flags); +} + +static void microchip_sgpio_irq_setreg(struct irq_data *data, + int reg, + bool clear) +{ + struct gpio_chip *chip = irq_data_get_irq_chip_data(data); + struct sgpio_bank *bank = gpiochip_get_data(chip); + unsigned int gpio = irqd_to_hwirq(data); + struct sgpio_port_addr addr; + + sgpio_pin_to_addr(bank->priv, gpio, &addr); + + if (clear) + sgpio_clrsetbits(bank->priv, reg, addr.bit, BIT(addr.port), 0); + else + sgpio_clrsetbits(bank->priv, reg, addr.bit, 0, BIT(addr.port)); +} + +static void microchip_sgpio_irq_mask(struct irq_data *data) +{ + struct gpio_chip *chip = irq_data_get_irq_chip_data(data); + + microchip_sgpio_irq_setreg(data, REG_INT_ENABLE, true); + gpiochip_disable_irq(chip, data->hwirq); +} + +static void microchip_sgpio_irq_unmask(struct irq_data *data) +{ + struct gpio_chip *chip = irq_data_get_irq_chip_data(data); + + gpiochip_enable_irq(chip, data->hwirq); + microchip_sgpio_irq_setreg(data, REG_INT_ENABLE, false); +} + +static void microchip_sgpio_irq_ack(struct irq_data *data) +{ + struct gpio_chip *chip = irq_data_get_irq_chip_data(data); + struct sgpio_bank *bank = gpiochip_get_data(chip); + unsigned int gpio = irqd_to_hwirq(data); + struct sgpio_port_addr addr; + + sgpio_pin_to_addr(bank->priv, gpio, &addr); + + sgpio_writel(bank->priv, BIT(addr.port), REG_INT_ACK, addr.bit); +} + +static int microchip_sgpio_irq_set_type(struct irq_data *data, unsigned int type) +{ + type &= IRQ_TYPE_SENSE_MASK; + + switch (type) { + case IRQ_TYPE_EDGE_BOTH: + irq_set_handler_locked(data, handle_edge_irq); + microchip_sgpio_irq_settype(data, SGPIO_INT_TRG_EDGE, 0); + break; + case IRQ_TYPE_EDGE_RISING: + irq_set_handler_locked(data, handle_edge_irq); + microchip_sgpio_irq_settype(data, SGPIO_INT_TRG_EDGE_RISE, 0); + break; + case IRQ_TYPE_EDGE_FALLING: + irq_set_handler_locked(data, handle_edge_irq); + microchip_sgpio_irq_settype(data, SGPIO_INT_TRG_EDGE_FALL, 0); + break; + case IRQ_TYPE_LEVEL_HIGH: + irq_set_handler_locked(data, handle_level_irq); + microchip_sgpio_irq_settype(data, SGPIO_INT_TRG_LEVEL, SGPIO_TRG_LEVEL_HIGH); + break; + case IRQ_TYPE_LEVEL_LOW: + irq_set_handler_locked(data, handle_level_irq); + microchip_sgpio_irq_settype(data, SGPIO_INT_TRG_LEVEL, SGPIO_TRG_LEVEL_LOW); + break; + default: + return -EINVAL; + } + + return 0; +} + +static const struct irq_chip microchip_sgpio_irqchip = { + .name = "gpio", + .irq_mask = microchip_sgpio_irq_mask, + .irq_ack = microchip_sgpio_irq_ack, + .irq_unmask = microchip_sgpio_irq_unmask, + .irq_set_type = microchip_sgpio_irq_set_type, + .flags = IRQCHIP_IMMUTABLE, + GPIOCHIP_IRQ_RESOURCE_HELPERS, +}; + +static void sgpio_irq_handler(struct irq_desc *desc) +{ + struct irq_chip *parent_chip = irq_desc_get_chip(desc); + struct gpio_chip *chip = irq_desc_get_handler_data(desc); + struct sgpio_bank *bank = gpiochip_get_data(chip); + struct sgpio_priv *priv = bank->priv; + int bit, port, gpio; + long val; + + for (bit = 0; bit < priv->bitcount; bit++) { + val = sgpio_readl(priv, REG_INT_IDENT, bit); + if (!val) + continue; + + chained_irq_enter(parent_chip, desc); + + for_each_set_bit(port, &val, SGPIO_BITS_PER_WORD) { + gpio = sgpio_addr_to_pin(priv, port, bit); + generic_handle_domain_irq(chip->irq.domain, gpio); + } + + chained_irq_exit(parent_chip, desc); + } +} + +static int microchip_sgpio_register_bank(struct device *dev, + struct sgpio_priv *priv, + struct fwnode_handle *fwnode, + int bankno) +{ + struct pinctrl_pin_desc *pins; + struct pinctrl_desc *pctl_desc; + struct pinctrl_dev *pctldev; + struct sgpio_bank *bank; + struct gpio_chip *gc; + u32 ngpios; + int i, ret; + + /* Get overall bank struct */ + bank = (bankno == 0) ? &priv->in : &priv->out; + bank->priv = priv; + + if (fwnode_property_read_u32(fwnode, "ngpios", &ngpios)) { + dev_info(dev, "failed to get number of gpios for bank%d\n", + bankno); + ngpios = 64; + } + + priv->bitcount = ngpios / SGPIO_BITS_PER_WORD; + if (priv->bitcount > SGPIO_MAX_BITS) { + dev_err(dev, "Bit width exceeds maximum (%d)\n", + SGPIO_MAX_BITS); + return -EINVAL; + } + + pctl_desc = &bank->pctl_desc; + pctl_desc->name = devm_kasprintf(dev, GFP_KERNEL, "%s-%sput", + dev_name(dev), + bank->is_input ? "in" : "out"); + if (!pctl_desc->name) + return -ENOMEM; + + pctl_desc->pctlops = &sgpio_pctl_ops; + pctl_desc->pmxops = &sgpio_pmx_ops; + pctl_desc->confops = &sgpio_confops; + pctl_desc->owner = THIS_MODULE; + + pins = devm_kzalloc(dev, sizeof(*pins)*ngpios, GFP_KERNEL); + if (!pins) + return -ENOMEM; + + pctl_desc->npins = ngpios; + pctl_desc->pins = pins; + + for (i = 0; i < ngpios; i++) { + struct sgpio_port_addr addr; + + sgpio_pin_to_addr(priv, i, &addr); + + pins[i].number = i; + pins[i].name = devm_kasprintf(dev, GFP_KERNEL, + "SGPIO_%c_p%db%d", + bank->is_input ? 'I' : 'O', + addr.port, addr.bit); + if (!pins[i].name) + return -ENOMEM; + } + + pctldev = devm_pinctrl_register(dev, pctl_desc, bank); + if (IS_ERR(pctldev)) + return dev_err_probe(dev, PTR_ERR(pctldev), "Failed to register pinctrl\n"); + + gc = &bank->gpio; + gc->label = pctl_desc->name; + gc->parent = dev; + gc->fwnode = fwnode; + gc->owner = THIS_MODULE; + gc->get_direction = microchip_sgpio_get_direction; + gc->direction_input = microchip_sgpio_direction_input; + gc->direction_output = microchip_sgpio_direction_output; + gc->get = microchip_sgpio_get_value; + gc->set = microchip_sgpio_set_value; + gc->request = gpiochip_generic_request; + gc->free = gpiochip_generic_free; + gc->of_xlate = microchip_sgpio_of_xlate; + gc->of_gpio_n_cells = 3; + gc->base = -1; + gc->ngpio = ngpios; + gc->can_sleep = !bank->is_input; + + if (bank->is_input && priv->properties->flags & SGPIO_FLAGS_HAS_IRQ) { + int irq; + + irq = fwnode_irq_get(fwnode, 0); + if (irq > 0) { + struct gpio_irq_chip *girq = &gc->irq; + + gpio_irq_chip_set_chip(girq, µchip_sgpio_irqchip); + girq->parent_handler = sgpio_irq_handler; + girq->num_parents = 1; + girq->parents = devm_kcalloc(dev, 1, + sizeof(*girq->parents), + GFP_KERNEL); + if (!girq->parents) + return -ENOMEM; + girq->parents[0] = irq; + girq->default_type = IRQ_TYPE_NONE; + girq->handler = handle_bad_irq; + + /* Disable all individual pins */ + for (i = 0; i < SGPIO_MAX_BITS; i++) + sgpio_writel(priv, 0, REG_INT_ENABLE, i); + /* Master enable */ + sgpio_clrsetbits(priv, REG_SIO_CONFIG, 0, 0, SGPIO_MASTER_INTR_ENA); + } + } + + ret = devm_gpiochip_add_data(dev, gc, bank); + if (ret) + dev_err(dev, "Failed to register: ret %d\n", ret); + + return ret; +} + +static int microchip_sgpio_probe(struct platform_device *pdev) +{ + int div_clock = 0, ret, port, i, nbanks; + struct device *dev = &pdev->dev; + struct fwnode_handle *fwnode; + struct reset_control *reset; + struct sgpio_priv *priv; + struct clk *clk; + u32 val; + struct regmap_config regmap_config = { + .reg_bits = 32, + .val_bits = 32, + .reg_stride = 4, + }; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->dev = dev; + spin_lock_init(&priv->lock); + mutex_init(&priv->poll_lock); + + reset = devm_reset_control_get_optional_shared(&pdev->dev, "switch"); + if (IS_ERR(reset)) + return dev_err_probe(dev, PTR_ERR(reset), "Failed to get reset\n"); + reset_control_reset(reset); + + clk = devm_clk_get(dev, NULL); + if (IS_ERR(clk)) + return dev_err_probe(dev, PTR_ERR(clk), "Failed to get clock\n"); + + div_clock = clk_get_rate(clk); + if (device_property_read_u32(dev, "bus-frequency", &priv->clock)) + priv->clock = 12500000; + if (priv->clock == 0 || priv->clock > (div_clock / 2)) { + dev_err(dev, "Invalid frequency %d\n", priv->clock); + return -EINVAL; + } + + priv->regs = ocelot_regmap_from_resource(pdev, 0, ®map_config); + if (IS_ERR(priv->regs)) + return PTR_ERR(priv->regs); + + priv->properties = device_get_match_data(dev); + priv->in.is_input = true; + + /* Get rest of device properties */ + ret = microchip_sgpio_get_ports(priv); + if (ret) + return ret; + + nbanks = device_get_child_node_count(dev); + if (nbanks != 2) { + dev_err(dev, "Must have 2 banks (have %d)\n", nbanks); + return -EINVAL; + } + + i = 0; + device_for_each_child_node(dev, fwnode) { + ret = microchip_sgpio_register_bank(dev, priv, fwnode, i++); + if (ret) { + fwnode_handle_put(fwnode); + return ret; + } + } + + if (priv->in.gpio.ngpio != priv->out.gpio.ngpio) { + dev_err(dev, "Banks must have same GPIO count\n"); + return -ERANGE; + } + + sgpio_configure_bitstream(priv); + + val = max(2U, div_clock / priv->clock); + sgpio_configure_clock(priv, val); + + for (port = 0; port < SGPIO_BITS_PER_WORD; port++) + sgpio_writel(priv, 0, REG_PORT_CONFIG, port); + sgpio_writel(priv, priv->ports, REG_PORT_ENABLE, 0); + + return 0; +} + +static const struct of_device_id microchip_sgpio_gpio_of_match[] = { + { + .compatible = "microchip,sparx5-sgpio", + .data = &properties_sparx5, + }, { + .compatible = "mscc,luton-sgpio", + .data = &properties_luton, + }, { + .compatible = "mscc,ocelot-sgpio", + .data = &properties_ocelot, + }, { + /* sentinel */ + } +}; +MODULE_DEVICE_TABLE(of, microchip_sgpio_gpio_of_match); + +static struct platform_driver microchip_sgpio_pinctrl_driver = { + .driver = { + .name = "pinctrl-microchip-sgpio", + .of_match_table = microchip_sgpio_gpio_of_match, + .suppress_bind_attrs = true, + }, + .probe = microchip_sgpio_probe, +}; +module_platform_driver(microchip_sgpio_pinctrl_driver); + +MODULE_DESCRIPTION("Microchip SGPIO Pinctrl Driver"); +MODULE_LICENSE("GPL"); -- cgit v1.2.3