diff options
Diffstat (limited to 'kernel/drivers/platform/mips')
| -rw-r--r-- | kernel/drivers/platform/mips/Kconfig | 30 | ||||
| -rw-r--r-- | kernel/drivers/platform/mips/Makefile | 2 | ||||
| -rw-r--r-- | kernel/drivers/platform/mips/acpi_init.c | 150 | ||||
| -rw-r--r-- | kernel/drivers/platform/mips/cpu_hwmon.c | 207 |
4 files changed, 389 insertions, 0 deletions
diff --git a/kernel/drivers/platform/mips/Kconfig b/kernel/drivers/platform/mips/Kconfig new file mode 100644 index 000000000..125e56901 --- /dev/null +++ b/kernel/drivers/platform/mips/Kconfig @@ -0,0 +1,30 @@ +# +# MIPS Platform Specific Drivers +# + +menuconfig MIPS_PLATFORM_DEVICES + bool "MIPS Platform Specific Device Drivers" + default y + 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 MIPS_ACPI + bool + default y if LOONGSON_MACH3X + +config CPU_HWMON + tristate "Loongson CPU HWMon Driver" + depends on LOONGSON_MACH3X + select HWMON + default y + help + Loongson-3A/3B CPU Hwmon (temperature sensor) driver. + +endif # MIPS_PLATFORM_DEVICES diff --git a/kernel/drivers/platform/mips/Makefile b/kernel/drivers/platform/mips/Makefile new file mode 100644 index 000000000..43412849b --- /dev/null +++ b/kernel/drivers/platform/mips/Makefile @@ -0,0 +1,2 @@ +obj-$(CONFIG_MIPS_ACPI) += acpi_init.o +obj-$(CONFIG_CPU_HWMON) += cpu_hwmon.o diff --git a/kernel/drivers/platform/mips/acpi_init.c b/kernel/drivers/platform/mips/acpi_init.c new file mode 100644 index 000000000..dbdad79ea --- /dev/null +++ b/kernel/drivers/platform/mips/acpi_init.c @@ -0,0 +1,150 @@ +#include <linux/io.h> +#include <linux/init.h> +#include <linux/ioport.h> +#include <linux/export.h> + +#define SBX00_ACPI_IO_BASE 0x800 +#define SBX00_ACPI_IO_SIZE 0x100 + +#define ACPI_PM_EVT_BLK (SBX00_ACPI_IO_BASE + 0x00) /* 4 bytes */ +#define ACPI_PM_CNT_BLK (SBX00_ACPI_IO_BASE + 0x04) /* 2 bytes */ +#define ACPI_PMA_CNT_BLK (SBX00_ACPI_IO_BASE + 0x0F) /* 1 byte */ +#define ACPI_PM_TMR_BLK (SBX00_ACPI_IO_BASE + 0x18) /* 4 bytes */ +#define ACPI_GPE0_BLK (SBX00_ACPI_IO_BASE + 0x10) /* 8 bytes */ +#define ACPI_END (SBX00_ACPI_IO_BASE + 0x80) + +#define PM_INDEX 0xCD6 +#define PM_DATA 0xCD7 +#define PM2_INDEX 0xCD0 +#define PM2_DATA 0xCD1 + +/* + * SCI interrupt need acpi space, allocate here + */ + +static int __init register_acpi_resource(void) +{ + request_region(SBX00_ACPI_IO_BASE, SBX00_ACPI_IO_SIZE, "acpi"); + return 0; +} + +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); +} + +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); +} + +int __init sbx00_acpi_init(void) +{ + register_acpi_resource(); + acpi_registers_setup(); + acpi_hw_clear_status(); + + return 0; +} diff --git a/kernel/drivers/platform/mips/cpu_hwmon.c b/kernel/drivers/platform/mips/cpu_hwmon.c new file mode 100644 index 000000000..0f6c63e17 --- /dev/null +++ b/kernel/drivers/platform/mips/cpu_hwmon.c @@ -0,0 +1,207 @@ +#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> + +/* + * 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; + + reg = LOONGSON_CHIPTEMP(cpu); + if (loongson_sysconf.cputype == Loongson_3A) + reg = (reg >> 8) & 0xff; + else if (loongson_sysconf.cputype == Loongson_3B) + reg = ((reg >> 8) & 0xff) - 100; + + return (int)reg * 1000; +} + +static struct device *cpu_hwmon_dev; + +static ssize_t get_hwmon_name(struct device *dev, + struct device_attribute *attr, char *buf); +static SENSOR_DEVICE_ATTR(name, S_IRUGO, get_hwmon_name, NULL, 0); + +static struct attribute *cpu_hwmon_attributes[] = { + &sensor_dev_attr_name.dev_attr.attr, + NULL +}; + +/* Hwmon device attribute group */ +static struct attribute_group cpu_hwmon_attribute_group = { + .attrs = cpu_hwmon_attributes, +}; + +/* Hwmon device get name */ +static ssize_t get_hwmon_name(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return sprintf(buf, "cpu-hwmon\n"); +} + +static ssize_t get_cpu0_temp(struct device *dev, + struct device_attribute *attr, char *buf); +static ssize_t get_cpu1_temp(struct device *dev, + struct device_attribute *attr, char *buf); +static ssize_t cpu0_temp_label(struct device *dev, + struct device_attribute *attr, char *buf); +static ssize_t cpu1_temp_label(struct device *dev, + struct device_attribute *attr, char *buf); + +static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, get_cpu0_temp, NULL, 1); +static SENSOR_DEVICE_ATTR(temp1_label, S_IRUGO, cpu0_temp_label, NULL, 1); +static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, get_cpu1_temp, NULL, 2); +static SENSOR_DEVICE_ATTR(temp2_label, S_IRUGO, cpu1_temp_label, NULL, 2); + +static const struct attribute *hwmon_cputemp1[] = { + &sensor_dev_attr_temp1_input.dev_attr.attr, + &sensor_dev_attr_temp1_label.dev_attr.attr, + NULL +}; + +static const struct attribute *hwmon_cputemp2[] = { + &sensor_dev_attr_temp2_input.dev_attr.attr, + &sensor_dev_attr_temp2_label.dev_attr.attr, + NULL +}; + +static ssize_t cpu0_temp_label(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return sprintf(buf, "CPU 0 Temprature\n"); +} + +static ssize_t cpu1_temp_label(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return sprintf(buf, "CPU 1 Temprature\n"); +} + +static ssize_t get_cpu0_temp(struct device *dev, + struct device_attribute *attr, char *buf) +{ + int value = loongson3_cpu_temp(0); + return sprintf(buf, "%d\n", value); +} + +static ssize_t get_cpu1_temp(struct device *dev, + struct device_attribute *attr, char *buf) +{ + int value = loongson3_cpu_temp(1); + return sprintf(buf, "%d\n", value); +} + +static int create_sysfs_cputemp_files(struct kobject *kobj) +{ + int ret; + + ret = sysfs_create_files(kobj, hwmon_cputemp1); + if (ret) + goto sysfs_create_temp1_fail; + + if (loongson_sysconf.nr_cpus <= loongson_sysconf.cores_per_package) + return 0; + + ret = sysfs_create_files(kobj, hwmon_cputemp2); + if (ret) + goto sysfs_create_temp2_fail; + + return 0; + +sysfs_create_temp2_fail: + sysfs_remove_files(kobj, hwmon_cputemp1); + +sysfs_create_temp1_fail: + return -1; +} + +static void remove_sysfs_cputemp_files(struct kobject *kobj) +{ + sysfs_remove_files(&cpu_hwmon_dev->kobj, hwmon_cputemp1); + + if (loongson_sysconf.nr_cpus > loongson_sysconf.cores_per_package) + sysfs_remove_files(&cpu_hwmon_dev->kobj, hwmon_cputemp2); +} + +#define CPU_THERMAL_THRESHOLD 90000 +static struct delayed_work thermal_work; + +static void do_thermal_timer(struct work_struct *work) +{ + int value = loongson3_cpu_temp(0); + if (value <= CPU_THERMAL_THRESHOLD) + schedule_delayed_work(&thermal_work, msecs_to_jiffies(5000)); + else + orderly_poweroff(true); +} + +static int __init loongson_hwmon_init(void) +{ + int ret; + + pr_info("Loongson Hwmon Enter...\n"); + + cpu_hwmon_dev = hwmon_device_register(NULL); + if (IS_ERR(cpu_hwmon_dev)) { + ret = -ENOMEM; + pr_err("hwmon_device_register fail!\n"); + goto fail_hwmon_device_register; + } + + ret = sysfs_create_group(&cpu_hwmon_dev->kobj, + &cpu_hwmon_attribute_group); + if (ret) { + pr_err("fail to create loongson hwmon!\n"); + goto fail_sysfs_create_group_hwmon; + } + + ret = create_sysfs_cputemp_files(&cpu_hwmon_dev->kobj); + if (ret) { + pr_err("fail to create cpu temprature interface!\n"); + goto fail_create_sysfs_cputemp_files; + } + + INIT_DEFERRABLE_WORK(&thermal_work, do_thermal_timer); + schedule_delayed_work(&thermal_work, msecs_to_jiffies(20000)); + + return ret; + +fail_create_sysfs_cputemp_files: + sysfs_remove_group(&cpu_hwmon_dev->kobj, + &cpu_hwmon_attribute_group); + +fail_sysfs_create_group_hwmon: + hwmon_device_unregister(cpu_hwmon_dev); + +fail_hwmon_device_register: + return ret; +} + +static void __exit loongson_hwmon_exit(void) +{ + cancel_delayed_work_sync(&thermal_work); + remove_sysfs_cputemp_files(&cpu_hwmon_dev->kobj); + sysfs_remove_group(&cpu_hwmon_dev->kobj, + &cpu_hwmon_attribute_group); + 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"); |