From 4352b8aee98005853aa63f57d6377282de17a33f Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sun, 23 Aug 2026 13:28:57 -0700 Subject: Merge tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux Pull I3C updates from Alexandre Belloni: "A new driver this cycle, for the AMD AXI I3C controller. There are also new features such as IBI wakeup support, SETAASA device discovery and ACPI support for the the DAA methods, meaning we can now communicate with the SPD devices on DDR5 modules. New driver: - AMD AXI I3C master controller Subsystem: - I3C Common Command Code (CCC) handling improvements, especially around GET CCCs - SETAASA device discovery support - ACPI support for all existing DAA methods like SETDASA, SETNEWDA as well as I2C devices on I3C bus - IBI-based wakeup support Drivers: - dw: SETAASA support - mipi-i3c-hci: advertise IBI wakeup capability, AMD_PT I3C controller support, PIO queue management support for HCI v1.2 - renesas: improve suspend to RAM support, add runtime PM support" * tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux: (70 commits) i3c: dw: reduce do_daa time if there's no client i3c: mipi-i3c-hci: Add support for AMD_PT I3C controller i3c: mipi-i3c-hci: Add PIO queue management support for HCI v1.2 i3c: mipi-i3c-hci: Fix missing STAT_IBI_STATUS_THLD in PIO mode i3c: dw: rename "pclk" to "apb" to match dt-binding i3c: dw: make struct dw_i3c_cmd smaller i3c: dw: use COMMAND_PORT_TRANSFER_ARG instead of hardcoding i3c: renesas: Don't register devices when ENTDAA times out i3c: master: dw-i3c-master: fix OD timing for first broadcast i3c: mipi-i3c-hci: Advertise IBI wakeup capability i3c: mipi-i3c-hci: Factor out i3c_hci_sysdev() i3c: mipi-i3c-hci-pci: Propagate I3C wakeup requirements to PCI i3c: master: Reject IBI requests from non-IBI-capable devices i3c: master: Add helper to query bus wakeup requirements i3c: master: Report wakeup events for IBIs i3c: master: Support IBI-based wakeup capability i3c: master: Fix potential UAF in i3c_device_match() i3c: master: Fix potential UAF in i3c_device_uevent() i3c: Make dev->desc locking assumptions explicit i3c: master: Fix use-after-free of master->this ... --- drivers/platform/mips/Kconfig | 40 +++++++++ drivers/platform/mips/Makefile | 4 + drivers/platform/mips/cpu_hwmon.c | 173 ++++++++++++++++++++++++++++++++++++ drivers/platform/mips/ls2k-reset.c | 53 +++++++++++ drivers/platform/mips/rs780e-acpi.c | 165 ++++++++++++++++++++++++++++++++++ 5 files changed, 435 insertions(+) create mode 100644 drivers/platform/mips/Kconfig create mode 100644 drivers/platform/mips/Makefile create mode 100644 drivers/platform/mips/cpu_hwmon.c create mode 100644 drivers/platform/mips/ls2k-reset.c create mode 100644 drivers/platform/mips/rs780e-acpi.c (limited to 'drivers/platform/mips') diff --git a/drivers/platform/mips/Kconfig b/drivers/platform/mips/Kconfig new file mode 100644 index 000000000..fb4ac4b08 --- /dev/null +++ b/drivers/platform/mips/Kconfig @@ -0,0 +1,40 @@ +# SPDX-License-Identifier: GPL-2.0-only +# +# MIPS Platform Specific Drivers +# + +menuconfig MIPS_PLATFORM_DEVICES + bool "MIPS Platform Specific Device Drivers" + default y + depends on MIPS + help + Say Y here to get to see options for device drivers of various + MIPS platforms, including vendor-specific netbook/laptop/desktop + extension and hardware monitor drivers. This option itself does + not add any kernel code. + + If you say N, all options in this submenu will be skipped and disabled. + +if MIPS_PLATFORM_DEVICES + +config CPU_HWMON + bool "Loongson-3 CPU HWMon Driver" + depends on MACH_LOONGSON64 + select HWMON + default y + help + Loongson-3A/3B CPU Hwmon (temperature sensor) driver. + +config RS780E_ACPI + bool "Loongson RS780E ACPI Controller" + depends on MACH_LOONGSON64 || COMPILE_TEST + help + Loongson RS780E PCH ACPI Controller driver. + +config LS2K_RESET + bool "Loongson-2K1000 Reset Controller" + depends on MACH_LOONGSON64 || COMPILE_TEST + help + Loongson-2K1000 Reset Controller driver. + +endif # MIPS_PLATFORM_DEVICES diff --git a/drivers/platform/mips/Makefile b/drivers/platform/mips/Makefile new file mode 100644 index 000000000..4c71444e4 --- /dev/null +++ b/drivers/platform/mips/Makefile @@ -0,0 +1,4 @@ +# SPDX-License-Identifier: GPL-2.0-only +obj-$(CONFIG_CPU_HWMON) += cpu_hwmon.o +obj-$(CONFIG_RS780E_ACPI) += rs780e-acpi.o +obj-$(CONFIG_LS2K_RESET) += ls2k-reset.o diff --git a/drivers/platform/mips/cpu_hwmon.c b/drivers/platform/mips/cpu_hwmon.c new file mode 100644 index 000000000..2ac2f3109 --- /dev/null +++ b/drivers/platform/mips/cpu_hwmon.c @@ -0,0 +1,173 @@ +// SPDX-License-Identifier: GPL-2.0-only +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include + +static int csr_temp_enable; + +/* + * Loongson-3 series cpu has two sensors inside, + * each of them from 0 to 255, + * if more than 127, that is dangerous. + * here only provide sensor1 data, because it always hot than sensor0 + */ +int loongson3_cpu_temp(int cpu) +{ + u32 reg, prid_rev; + + if (csr_temp_enable) { + reg = (csr_readl(LOONGSON_CSR_CPUTEMP) & 0xff); + goto out; + } + + reg = LOONGSON_CHIPTEMP(cpu); + prid_rev = read_c0_prid() & PRID_REV_MASK; + + switch (prid_rev) { + case PRID_REV_LOONGSON3A_R1: + reg = (reg >> 8) & 0xff; + break; + case PRID_REV_LOONGSON3B_R1: + case PRID_REV_LOONGSON3B_R2: + case PRID_REV_LOONGSON3A_R2_0: + case PRID_REV_LOONGSON3A_R2_1: + reg = ((reg >> 8) & 0xff) - 100; + break; + case PRID_REV_LOONGSON3A_R3_0: + case PRID_REV_LOONGSON3A_R3_1: + default: + reg = (reg & 0xffff) * 731 / 0x4000 - 273; + break; + } + +out: + return (int)reg * 1000; +} + +static int nr_packages; +static struct device *cpu_hwmon_dev; + +static ssize_t cpu_temp_label(struct device *dev, + struct device_attribute *attr, char *buf) +{ + int id = (to_sensor_dev_attr(attr))->index - 1; + + return sprintf(buf, "CPU %d Temperature\n", id); +} + +static ssize_t get_cpu_temp(struct device *dev, + struct device_attribute *attr, char *buf) +{ + int id = (to_sensor_dev_attr(attr))->index - 1; + int value = loongson3_cpu_temp(id); + + return sprintf(buf, "%d\n", value); +} + +static SENSOR_DEVICE_ATTR(temp1_input, 0444, get_cpu_temp, NULL, 1); +static SENSOR_DEVICE_ATTR(temp1_label, 0444, cpu_temp_label, NULL, 1); +static SENSOR_DEVICE_ATTR(temp2_input, 0444, get_cpu_temp, NULL, 2); +static SENSOR_DEVICE_ATTR(temp2_label, 0444, cpu_temp_label, NULL, 2); +static SENSOR_DEVICE_ATTR(temp3_input, 0444, get_cpu_temp, NULL, 3); +static SENSOR_DEVICE_ATTR(temp3_label, 0444, cpu_temp_label, NULL, 3); +static SENSOR_DEVICE_ATTR(temp4_input, 0444, get_cpu_temp, NULL, 4); +static SENSOR_DEVICE_ATTR(temp4_label, 0444, cpu_temp_label, NULL, 4); + +static struct attribute *cpu_hwmon_attributes[] = { + &sensor_dev_attr_temp1_input.dev_attr.attr, + &sensor_dev_attr_temp1_label.dev_attr.attr, + &sensor_dev_attr_temp2_input.dev_attr.attr, + &sensor_dev_attr_temp2_label.dev_attr.attr, + &sensor_dev_attr_temp3_input.dev_attr.attr, + &sensor_dev_attr_temp3_label.dev_attr.attr, + &sensor_dev_attr_temp4_input.dev_attr.attr, + &sensor_dev_attr_temp4_label.dev_attr.attr, + NULL +}; + +static umode_t cpu_hwmon_is_visible(struct kobject *kobj, + struct attribute *attr, int i) +{ + int id = i / 2; + + if (id < nr_packages) + return attr->mode; + return 0; +} + +static struct attribute_group cpu_hwmon_group = { + .attrs = cpu_hwmon_attributes, + .is_visible = cpu_hwmon_is_visible, +}; + +static const struct attribute_group *cpu_hwmon_groups[] = { + &cpu_hwmon_group, + NULL +}; + +#define CPU_THERMAL_THRESHOLD 90000 +static struct delayed_work thermal_work; + +static void do_thermal_timer(struct work_struct *work) +{ + int i, value; + + for (i = 0; i < nr_packages; i++) { + value = loongson3_cpu_temp(i); + if (value > CPU_THERMAL_THRESHOLD) { + pr_emerg("Power off due to high temp: %d\n", value); + orderly_poweroff(true); + } + } + + schedule_delayed_work(&thermal_work, msecs_to_jiffies(5000)); +} + +static int __init loongson_hwmon_init(void) +{ + pr_info("Loongson Hwmon Enter...\n"); + + if (cpu_has_csr()) + csr_temp_enable = csr_readl(LOONGSON_CSR_FEATURES) & + LOONGSON_CSRF_TEMP; + + if (!csr_temp_enable && !loongson_chiptemp[0]) + return -ENODEV; + + nr_packages = loongson_sysconf.nr_cpus / + loongson_sysconf.cores_per_package; + + cpu_hwmon_dev = hwmon_device_register_with_groups(NULL, "cpu_hwmon", + NULL, cpu_hwmon_groups); + if (IS_ERR(cpu_hwmon_dev)) { + pr_err("hwmon_device_register fail!\n"); + return PTR_ERR(cpu_hwmon_dev); + } + + INIT_DEFERRABLE_WORK(&thermal_work, do_thermal_timer); + schedule_delayed_work(&thermal_work, msecs_to_jiffies(20000)); + + return 0; +} + +static void __exit loongson_hwmon_exit(void) +{ + cancel_delayed_work_sync(&thermal_work); + hwmon_device_unregister(cpu_hwmon_dev); +} + +module_init(loongson_hwmon_init); +module_exit(loongson_hwmon_exit); + +MODULE_AUTHOR("Yu Xiang "); +MODULE_AUTHOR("Huacai Chen "); +MODULE_DESCRIPTION("Loongson CPU Hwmon driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/platform/mips/ls2k-reset.c b/drivers/platform/mips/ls2k-reset.c new file mode 100644 index 000000000..8f42d5d16 --- /dev/null +++ b/drivers/platform/mips/ls2k-reset.c @@ -0,0 +1,53 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2021, Qing Zhang + * Loongson-2K1000 reset support + */ + +#include +#include +#include + +#define PM1_STS 0x0c /* Power Management 1 Status Register */ +#define PM1_CNT 0x14 /* Power Management 1 Control Register */ +#define RST_CNT 0x30 /* Reset Control Register */ + +static void __iomem *base; + +static void ls2k_restart(char *command) +{ + writel(0x1, base + RST_CNT); +} + +static void ls2k_poweroff(void) +{ + /* Clear */ + writel((readl(base + PM1_STS) & 0xffffffff), base + PM1_STS); + /* Sleep Enable | Soft Off*/ + writel(GENMASK(12, 10) | BIT(13), base + PM1_CNT); +} + +static int ls2k_reset_init(void) +{ + struct device_node *np; + + np = of_find_compatible_node(NULL, NULL, "loongson,ls2k-pm"); + if (!np) { + pr_info("Failed to get PM node\n"); + return -ENODEV; + } + + base = of_iomap(np, 0); + of_node_put(np); + if (!base) { + pr_info("Failed to map PM register base address\n"); + return -ENOMEM; + } + + _machine_restart = ls2k_restart; + pm_power_off = ls2k_poweroff; + + return 0; +} + +arch_initcall(ls2k_reset_init); diff --git a/drivers/platform/mips/rs780e-acpi.c b/drivers/platform/mips/rs780e-acpi.c new file mode 100644 index 000000000..5b8f9cc32 --- /dev/null +++ b/drivers/platform/mips/rs780e-acpi.c @@ -0,0 +1,165 @@ +// SPDX-License-Identifier: GPL-2.0 +#include +#include +#include +#include +#include +#include + +static unsigned long acpi_iobase; + +#define ACPI_PM_EVT_BLK (acpi_iobase + 0x00) /* 4 bytes */ +#define ACPI_PM_CNT_BLK (acpi_iobase + 0x04) /* 2 bytes */ +#define ACPI_PMA_CNT_BLK (acpi_iobase + 0x0F) /* 1 byte */ +#define ACPI_PM_TMR_BLK (acpi_iobase + 0x18) /* 4 bytes */ +#define ACPI_GPE0_BLK (acpi_iobase + 0x10) /* 8 bytes */ +#define ACPI_END (acpi_iobase + 0x80) + +#define PM_INDEX 0xCD6 +#define PM_DATA 0xCD7 +#define PM2_INDEX 0xCD0 +#define PM2_DATA 0xCD1 + +static void pmio_write_index(u16 index, u8 reg, u8 value) +{ + outb(reg, index); + outb(value, index + 1); +} + +static u8 pmio_read_index(u16 index, u8 reg) +{ + outb(reg, index); + return inb(index + 1); +} + +static void pm_iowrite(u8 reg, u8 value) +{ + pmio_write_index(PM_INDEX, reg, value); +} + +static u8 pm_ioread(u8 reg) +{ + return pmio_read_index(PM_INDEX, reg); +} + +static void pm2_iowrite(u8 reg, u8 value) +{ + pmio_write_index(PM2_INDEX, reg, value); +} + +static u8 pm2_ioread(u8 reg) +{ + return pmio_read_index(PM2_INDEX, reg); +} + +static void acpi_hw_clear_status(void) +{ + u16 value; + + /* PMStatus: Clear WakeStatus/PwrBtnStatus */ + value = inw(ACPI_PM_EVT_BLK); + value |= (1 << 8 | 1 << 15); + outw(value, ACPI_PM_EVT_BLK); + + /* GPEStatus: Clear all generated events */ + outl(inl(ACPI_GPE0_BLK), ACPI_GPE0_BLK); +} + +static void acpi_registers_setup(void) +{ + u32 value; + + /* PM Status Base */ + pm_iowrite(0x20, ACPI_PM_EVT_BLK & 0xff); + pm_iowrite(0x21, ACPI_PM_EVT_BLK >> 8); + + /* PM Control Base */ + pm_iowrite(0x22, ACPI_PM_CNT_BLK & 0xff); + pm_iowrite(0x23, ACPI_PM_CNT_BLK >> 8); + + /* GPM Base */ + pm_iowrite(0x28, ACPI_GPE0_BLK & 0xff); + pm_iowrite(0x29, ACPI_GPE0_BLK >> 8); + + /* ACPI End */ + pm_iowrite(0x2e, ACPI_END & 0xff); + pm_iowrite(0x2f, ACPI_END >> 8); + + /* IO Decode: When AcpiDecodeEnable set, South-Bridge uses the contents + * of the PM registers at index 0x20~0x2B to decode ACPI I/O address. */ + pm_iowrite(0x0e, 1 << 3); + + /* SCI_EN set */ + outw(1, ACPI_PM_CNT_BLK); + + /* Enable to generate SCI */ + pm_iowrite(0x10, pm_ioread(0x10) | 1); + + /* GPM3/GPM9 enable */ + value = inl(ACPI_GPE0_BLK + 4); + outl(value | (1 << 14) | (1 << 22), ACPI_GPE0_BLK + 4); + + /* Set GPM9 as input */ + pm_iowrite(0x8d, pm_ioread(0x8d) & (~(1 << 1))); + + /* Set GPM9 as non-output */ + pm_iowrite(0x94, pm_ioread(0x94) | (1 << 3)); + + /* GPM3 config ACPI trigger SCIOUT */ + pm_iowrite(0x33, pm_ioread(0x33) & (~(3 << 4))); + + /* GPM9 config ACPI trigger SCIOUT */ + pm_iowrite(0x3d, pm_ioread(0x3d) & (~(3 << 2))); + + /* GPM3 config falling edge trigger */ + pm_iowrite(0x37, pm_ioread(0x37) & (~(1 << 6))); + + /* No wait for STPGNT# in ACPI Sx state */ + pm_iowrite(0x7c, pm_ioread(0x7c) | (1 << 6)); + + /* Set GPM3 pull-down enable */ + value = pm2_ioread(0xf6); + value |= ((1 << 7) | (1 << 3)); + pm2_iowrite(0xf6, value); + + /* Set GPM9 pull-down enable */ + value = pm2_ioread(0xf8); + value |= ((1 << 5) | (1 << 1)); + pm2_iowrite(0xf8, value); +} + +static int rs780e_acpi_probe(struct platform_device *pdev) +{ + struct resource *res; + + res = platform_get_resource(pdev, IORESOURCE_IO, 0); + if (!res) + return -ENODEV; + + /* SCI interrupt need acpi space, allocate here */ + if (!request_region(res->start, resource_size(res), "acpi")) { + pr_err("RS780E-ACPI: Failed to request IO Region\n"); + return -EBUSY; + } + + acpi_iobase = res->start; + + acpi_registers_setup(); + acpi_hw_clear_status(); + + return 0; +} + +static const struct of_device_id rs780e_acpi_match[] = { + { .compatible = "loongson,rs780e-acpi" }, + {}, +}; + +static struct platform_driver rs780e_acpi_driver = { + .probe = rs780e_acpi_probe, + .driver = { + .name = "RS780E-ACPI", + .of_match_table = rs780e_acpi_match, + }, +}; +builtin_platform_driver(rs780e_acpi_driver); -- cgit v1.3.1