/* SPDX-License-Identifier: GPL-2.0-or-later */ #include #include #include #include #include "nct5104d.h" #include "chip.h" static void set_irq_trigger_type(struct device *dev, bool trig_level) { u8 reg10, reg11, reg26; //Before accessing CR10 OR CR11 Bit 4 in CR26 must be set to 1 reg26 = pnp_read_config(dev, GLOBAL_OPTION_CR26); reg26 |= CR26_LOCK_REG; pnp_write_config(dev, GLOBAL_OPTION_CR26, reg26); switch (dev->path.pnp.device) { //SP1 (UARTA) IRQ type selection (1:level,0:edge) is controlled by CR 10, bit 5 case NCT5104D_SP1: reg10 = pnp_read_config(dev, IRQ_TYPE_SEL_CR10); if (trig_level) reg10 |= (1 << 5); else reg10 &= ~(1 << 5); pnp_write_config(dev, IRQ_TYPE_SEL_CR10, reg10); break; //SP2 (UARTB) IRQ type selection (1:level,0:edge) is controlled by CR 10, bit 4 case NCT5104D_SP2: reg10 = pnp_read_config(dev, IRQ_TYPE_SEL_CR10); if (trig_level) reg10 |= (1 << 4); else reg10 &= ~(1 << 4); pnp_write_config(dev, IRQ_TYPE_SEL_CR10, reg10); break; //SP3 (UARTC) IRQ type selection (1:level,0:edge) is controlled by CR 11, bit 5 case NCT5104D_SP3: reg11 = pnp_read_config(dev,IRQ_TYPE_SEL_CR11); if (trig_level) reg11 |= (1 << 5); else reg11 &= ~(1 << 5); pnp_write_config(dev, IRQ_TYPE_SEL_CR11, reg11); break; //SP4 (UARTD) IRQ type selection (1:level,0:edge) is controlled by CR 11, bit 4 case NCT5104D_SP4: reg11 = pnp_read_config(dev,IRQ_TYPE_SEL_CR11); if (trig_level) reg11 |= (1 << 4); else reg11 &= ~(1 << 4); pnp_write_config(dev, IRQ_TYPE_SEL_CR11, reg11); break; default: break; } //Clear access control register reg26 = pnp_read_config(dev, GLOBAL_OPTION_CR26); reg26 &= ~CR26_LOCK_REG; pnp_write_config(dev, GLOBAL_OPTION_CR26, reg26); } static void route_pins_to_uart(struct device *dev, bool to_uart) { u8 reg; reg = pnp_read_config(dev, 0x1c); switch (dev->path.pnp.device) { case NCT5104D_SP3: case NCT5104D_GPIO0: /* Route pins 33 - 40. */ if (to_uart) reg |= (1 << 3); else reg &= ~(1 << 3); break; case NCT5104D_SP4: case NCT5104D_GPIO1: /* Route pins 41 - 48. */ if (to_uart) reg |= (1 << 2); else reg &= ~(1 << 2); break; default: break; } pnp_write_config(dev, 0x1c, reg); } static void reset_gpio_default_in(struct device *dev) { pnp_set_logical_device(dev); /* * Soft reset GPIOs to default state: IN. * The main GPIO LDN holds registers that configure the pins as output * or input. These registers are located at offset 0xE0 plus the GPIO * bank number multiplied by 4: 0xE0 for GPIO0, 0xE4 for GPIO1 and * 0xF8 for GPIO6. */ pnp_write_config(dev, NCT5104D_GPIO0_IO + (dev->path.pnp.device >> 8) * 4, 0xFF); } static void reset_gpio_default_od(struct device *dev) { struct device *gpio0, *gpio1, *gpio6; pnp_set_logical_device(dev); gpio0 = dev_find_slot_pnp(dev->path.pnp.port, NCT5104D_GPIO0); gpio1 = dev_find_slot_pnp(dev->path.pnp.port, NCT5104D_GPIO1); gpio6 = dev_find_slot_pnp(dev->path.pnp.port, NCT5104D_GPIO6); /* * Soft reset GPIOs to default state: Open-drain. * The NCT5104D_GPIO_PP_OD LDN holds registers (1 for each GPIO bank) * that configure each GPIO pin to be open dain or push pull. System * reset is known to not reset the values in this register. The * registers are located at offsets begginign from 0xE0 plus GPIO bank * number, i.e. 0xE0 for GPIO0, 0xE1 for GPIO1 and 0xE6 for GPIO6. */ if (gpio0 && gpio0->enabled) pnp_write_config(dev, (gpio0->path.pnp.device >> 8) + NCT5104D_GPIO0_PP_OD, 0xFF); if (gpio1 && gpio1->enabled) pnp_write_config(dev, (gpio1->path.pnp.device >> 8) + NCT5104D_GPIO0_PP_OD, 0xFF); if (gpio6 && gpio6->enabled) pnp_write_config(dev, (gpio6->path.pnp.device >> 8) + NCT5104D_GPIO0_PP_OD, 0xFF); } static void disable_gpio_io_port(struct device *dev) { struct device *gpio0, *gpio1, *gpio6; /* * Since UARTC and UARTD share pins with GPIO0 and GPIO1 and the * GPIO/UART can be selected via Kconfig, check whether at least one of * GPIOs is enabled and if yes keep the GPIO IO VLDN enabled. If no * GPIOs are enabled, disable the VLDN in order to protect from invalid * devicetree + Kconfig settings. */ gpio0 = dev_find_slot_pnp(dev->path.pnp.port, NCT5104D_GPIO0); gpio1 = dev_find_slot_pnp(dev->path.pnp.port, NCT5104D_GPIO1); gpio6 = dev_find_slot_pnp(dev->path.pnp.port, NCT5104D_GPIO6); if (!((gpio0 && gpio0->enabled) || (gpio1 && gpio1->enabled) || (gpio6 && gpio6->enabled))) { dev->enabled = 0; printk(BIOS_WARNING, "GPIO IO port configured," " but no GPIO enabled. Disabling..."); } } static void nct5104d_init(struct device *dev) { struct superio_nuvoton_nct5104d_config *conf = dev->chip_info; if (!dev->enabled) return; pnp_enter_conf_mode(dev); switch (dev->path.pnp.device) { case NCT5104D_SP1: case NCT5104D_SP2: set_irq_trigger_type(dev, conf->irq_trigger_type != 0); break; case NCT5104D_SP3: case NCT5104D_SP4: route_pins_to_uart(dev, true); set_irq_trigger_type(dev, conf->irq_trigger_type != 0); break; case NCT5104D_GPIO0: case NCT5104D_GPIO1: route_pins_to_uart(dev, false); __fallthrough; case NCT5104D_GPIO6: if (conf->reset_gpios) reset_gpio_default_in(dev); break; case NCT5104D_GPIO_PP_OD: if (conf->reset_gpios) reset_gpio_default_od(dev); break; case NCT5104D_GPIO_IO: disable_gpio_io_port(dev); break; default: break; } pnp_exit_conf_mode(dev); } static struct device_operations ops = { .read_resources = pnp_read_resources, .set_resources = pnp_set_resources, .enable_resources = pnp_enable_resources, .enable = pnp_alt_enable, .init = nct5104d_init, .ops_pnp_mode = &pnp_conf_mode_8787_aa, }; static struct pnp_info pnp_dev_info[] = { { NULL, NCT5104D_FDC, PNP_IO0 | PNP_IRQ0, 0x07f8, }, { NULL, NCT5104D_SP1, PNP_IO0 | PNP_IRQ0, 0x07f8, }, { NULL, NCT5104D_SP2, PNP_IO0 | PNP_IRQ0, 0x07f8, }, { NULL, NCT5104D_SP3, PNP_IO0 | PNP_IRQ0, 0x07f8, }, { NULL, NCT5104D_SP4, PNP_IO0 | PNP_IRQ0, 0x07f8, }, { NULL, NCT5104D_GPIO_WDT}, { NULL, NCT5104D_GPIO0}, { NULL, NCT5104D_GPIO1}, { NULL, NCT5104D_GPIO6}, { NULL, NCT5104D_GPIO_PP_OD}, { NULL, NCT5104D_GPIO_IO, PNP_IO0, 0x07f8, }, { NULL, NCT5104D_PORT80}, }; static void enable_dev(struct device *dev) { pnp_enable_devices(dev, &ops, ARRAY_SIZE(pnp_dev_info), pnp_dev_info); } struct chip_operations superio_nuvoton_nct5104d_ops = { .name = "Nuvoton NCT5104D Super I/O", .enable_dev = enable_dev, };