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-rw-r--r--drivers/platform/mips/Kconfig40
-rw-r--r--drivers/platform/mips/Makefile4
-rw-r--r--drivers/platform/mips/cpu_hwmon.c170
-rw-r--r--drivers/platform/mips/ls2k-reset.c53
-rw-r--r--drivers/platform/mips/rs780e-acpi.c169
5 files changed, 436 insertions, 0 deletions
diff --git a/drivers/platform/mips/Kconfig b/drivers/platform/mips/Kconfig
new file mode 100644
index 0000000000..fb4ac4b08e
--- /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 0000000000..4c71444e45
--- /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 0000000000..d8c5f9195f
--- /dev/null
+++ b/drivers/platform/mips/cpu_hwmon.c
@@ -0,0 +1,170 @@
+// SPDX-License-Identifier: GPL-2.0-only
+#include <linux/err.h>
+#include <linux/module.h>
+#include <linux/reboot.h>
+#include <linux/jiffies.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
+
+#include <loongson.h>
+#include <boot_param.h>
+#include <loongson_hwmon.h>
+#include <loongson_regs.h>
+
+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;
+
+ 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 <xiangy@lemote.com>");
+MODULE_AUTHOR("Huacai Chen <chenhc@lemote.com>");
+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 0000000000..8f42d5d164
--- /dev/null
+++ b/drivers/platform/mips/ls2k-reset.c
@@ -0,0 +1,53 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2021, Qing Zhang <zhangqing@loongson.cn>
+ * Loongson-2K1000 reset support
+ */
+
+#include <linux/of_address.h>
+#include <linux/pm.h>
+#include <asm/reboot.h>
+
+#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 0000000000..bb0e8ae0ee
--- /dev/null
+++ b/drivers/platform/mips/rs780e-acpi.c
@@ -0,0 +1,169 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/io.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/export.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+
+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);
+}
+
+void pm_iowrite(u8 reg, u8 value)
+{
+ pmio_write_index(PM_INDEX, reg, value);
+}
+EXPORT_SYMBOL(pm_iowrite);
+
+u8 pm_ioread(u8 reg)
+{
+ return pmio_read_index(PM_INDEX, reg);
+}
+EXPORT_SYMBOL(pm_ioread);
+
+void pm2_iowrite(u8 reg, u8 value)
+{
+ pmio_write_index(PM2_INDEX, reg, value);
+}
+EXPORT_SYMBOL(pm2_iowrite);
+
+u8 pm2_ioread(u8 reg)
+{
+ return pmio_read_index(PM2_INDEX, reg);
+}
+EXPORT_SYMBOL(pm2_ioread);
+
+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);
generated by cgit v1.2.3 (git 2.39.1) at 2024-09-12 21:15:34 +0000