mirror of
https://gitee.com/open-loongarch/linux-5.10.git
synced 2026-10-28 22:17:12 +08:00
maoxiaochuan
3904801f2b
1.Fix spidev delay-usec cannot work 2.Fix spi transfer failed when use gpio cs 3.Support EC200N-CN 4G model 4.Fix alert/critical temperature to 75/105 for 2k300 5.Enable ch341,pl2303 for 2k300_defconfig
309 lines
7.4 KiB
C
309 lines
7.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/cpufreq.h>
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#include <linux/delay.h>
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#include <linux/interrupt.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/io.h>
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#include <linux/of_device.h>
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#include <linux/thermal.h>
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#include "thermal_hwmon.h"
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#define LS2K_SOC_DEFAULT_SENSOR 0
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#define LS2K_SOC_MAX_SENSOR_NUM 3
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#define LS2K_TSENSOR_CTRL_HI (0x0)
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#define LS2K_TSENSOR_CTRL_LO (0x8)
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#define LS2K_TSENSOR_STATUS (0x10)
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#define LS2K_TSENSOR_OUT (0x14)
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#define LS2K_TSENSOR_CFG (0x18)
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#define LS2K_MIN_TEMP -40
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#define LS2K_MAX_TEMP 125
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#define THSENS_OUT_OFFSET 100
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DEFINE_SPINLOCK(ls2k_tsensor_lock);
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enum cpu_id {
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ID_2K300 = 1,
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ID_OTHER,
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};
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struct ls2k_thermal_data {
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struct thermal_zone_device *tzd;
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int irq;
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int id;
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enum cpu_id cpu_type;
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void __iomem *regs;
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struct platform_device *pdev;
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irq_handler_t irq_handler;
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u16 ctrl_low_val;
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u16 ctrl_hi_val;
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};
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/**
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* @low : temperature in degree
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* @high: temperature in degree
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*/
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static int ls2k_tsensor_set(struct ls2k_thermal_data *data,
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int low, int high, bool enable)
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{
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u64 reg_ctrl = 0;
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/*
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* thsens_int_ctrl register have 4 sets of setup bits each using 2 Bytes
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*/
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int reg_off = data->id * 2;
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u8 lo_en = 8;
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u8 hi_en = 8;
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if (low > high)
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return -EINVAL;
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low = low < LS2K_MIN_TEMP ? LS2K_MIN_TEMP : low;
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high = high > LS2K_MAX_TEMP ? LS2K_MAX_TEMP : high;
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low += THSENS_OUT_OFFSET;
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high += THSENS_OUT_OFFSET;
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reg_ctrl |= low;
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reg_ctrl |= enable ? (1<<lo_en) : 0;
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writew(reg_ctrl, data->regs + LS2K_TSENSOR_CTRL_LO + reg_off);
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reg_ctrl = 0;
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reg_ctrl |= high;
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reg_ctrl |= enable ? (1<<hi_en) : 0;
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writew(reg_ctrl, data->regs + LS2K_TSENSOR_CTRL_HI + reg_off);
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return 0;
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}
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static int warning_2k300_old_fuse_tip;
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static int ls2k_thermal_get_temp(void *__data, int *temp)
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{
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struct ls2k_thermal_data *data = __data;
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u32 reg_val;
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int temp_val;
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int old_fuse_2k300;
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reg_val = readl(data->regs + LS2K_TSENSOR_OUT);
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if (data->cpu_type == ID_2K300) {
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int version;
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int val_fix;
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writel(0xff03, data->regs + LS2K_TSENSOR_CFG); // 0x18
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reg_val = readl(data->regs + LS2K_TSENSOR_OUT);
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reg_val &= 0x7ff;
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version = readl(data->regs + 0x2AF0); // 0x16003ff0
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version >>= 4;
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version &= 1;
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if(version)
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val_fix = readl(data->regs + 0x2AF4) & 0xffff; // 0x16003ff4
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else
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val_fix = (readl(data->regs + 0x2AF0) >> 20) & 0xffff; // 0x16003ff0
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if (val_fix & 0x8000)
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val_fix = -(val_fix & 0x7fff);
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else
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val_fix = val_fix & 0x7fff;
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reg_val += val_fix;
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temp_val = reg_val * 570 - 394700;
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/*
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* fix old 2k300 use old fuse that will let kernel crash critical temperature
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*/
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old_fuse_2k300 = 0;
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reg_val = temp_val;
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if (temp_val < -55000) {
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pr_info("look temp_val is %d\n", temp_val);
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old_fuse_2k300 = 1;
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temp_val = -55000;
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}
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else if (temp_val > 125000) {
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pr_info("look temp_val is %d\n", temp_val);
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old_fuse_2k300 = 1;
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temp_val = 125000;
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}
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if (old_fuse_2k300)
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{
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if (!warning_2k300_old_fuse_tip) {
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pr_err("%s this 2k300 use old fuse so thermal not right!(%d)\n", __func__, reg_val);
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warning_2k300_old_fuse_tip = 1;
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}
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reg_val = readl(data->regs + LS2K_TSENSOR_OUT);
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temp_val = ((reg_val & 0x7ff) * 569) - 394700;
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}
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*temp = temp_val;
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}
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else
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*temp = ((reg_val & 0xff) - 100) * 1000;
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return 0;
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}
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static irqreturn_t ls2k_thermal_irq_handler(int irq, void *dev_id)
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{
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struct ls2k_thermal_data *data = dev_id;
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/* clear interrupt */
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writeb(0x3, data->regs + LS2K_TSENSOR_STATUS);
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thermal_zone_device_update(data->tzd,
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THERMAL_EVENT_UNSPECIFIED);
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return IRQ_HANDLED;
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}
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static int ls2k_thermal_set_trips(void *data, int low, int high)
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{
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return ls2k_tsensor_set(data, low/1000, high/1000, true);
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}
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static const struct thermal_zone_of_device_ops ls2k_of_thermal_ops = {
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.get_temp = ls2k_thermal_get_temp,
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.set_trips = ls2k_thermal_set_trips,
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};
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static int ls2k_thermal_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct resource *res;
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struct ls2k_thermal_data *data;
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int ret;
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data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
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if (!data)
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return -ENOMEM;
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data->pdev = pdev;
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platform_set_drvdata(pdev, data);
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data->irq_handler = ls2k_thermal_irq_handler;
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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data->regs = devm_ioremap(dev, res->start, resource_size(res));
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if (IS_ERR(data->regs)) {
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dev_err(dev, "failed to get io address\n");
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return PTR_ERR(data->regs);
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}
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/* get irq */
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data->irq = platform_get_irq(pdev, 0);
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if (data->irq < 0)
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return data->irq;
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/* get cpu type */
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data->cpu_type = (enum cpu_id)of_device_get_match_data(dev);
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/* get id */
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if (of_property_read_u32(dev->of_node, "id", &data->id)) {
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dev_err(dev, "not found id property!\n");
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data->id = LS2K_SOC_DEFAULT_SENSOR;
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}
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if (data->id > LS2K_SOC_MAX_SENSOR_NUM) {
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dev_err(dev, "sensor id error,must be in <0 ~ %d>\n",
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LS2K_SOC_MAX_SENSOR_NUM);
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return -EINVAL;
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}
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writeb(0xff, data->regs + LS2K_TSENSOR_STATUS);
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ls2k_tsensor_set(data, 0, 0, false);
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data->tzd = devm_thermal_zone_of_sensor_register(&pdev->dev,
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data->id, data,
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&ls2k_of_thermal_ops);
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if (IS_ERR(data->tzd)) {
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ret = PTR_ERR(data->tzd);
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data->tzd = NULL;
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dev_err(&pdev->dev, "failed to register %d\n", ret);
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return ret;
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}
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ret = devm_request_threaded_irq(dev, data->irq, NULL, ls2k_thermal_irq_handler,
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IRQF_ONESHOT | IRQF_SHARED, "ls2k_thermal", data);
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if (ret < 0) {
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dev_err(dev, "failed to request alarm irq: %d\n", ret);
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return ret;
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}
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/*
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* Thermal_zone doesn't enable hwmon as default,
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* enable it here
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*/
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data->tzd->tzp->no_hwmon = false;
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ret = thermal_add_hwmon_sysfs(data->tzd);
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if (ret) {
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dev_err(dev, "failed to add hwmon sysfs interface %d\n", ret);
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return ret;
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}
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return 0;
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}
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int ls2k_thermal_remove(struct platform_device *pdev)
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{
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struct ls2k_thermal_data *data = platform_get_drvdata(pdev);
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int reg_off = data->id * 2;
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/* disable interrupt */
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writew(0, data->regs + LS2K_TSENSOR_CTRL_LO + reg_off);
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writew(0, data->regs + LS2K_TSENSOR_CTRL_HI + reg_off);
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return 0;
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}
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static const struct of_device_id of_ls2k_thermal_match[] = {
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{ .compatible = "loongson,ls2k-tsensor", .data = (void *)ID_OTHER},
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{ .compatible = "loongson,ls2k300-tsensor", .data = (void *)ID_2K300},
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{ /* end */ }
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};
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MODULE_DEVICE_TABLE(of, of_ls2k_thermal_match);
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#ifdef CONFIG_PM_SLEEP
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static int ls2k_thermal_suspend(struct device *dev)
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{
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struct ls2k_thermal_data *data = dev_get_drvdata(dev);
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int reg_off = data->id * 2;
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data->ctrl_low_val = readw(data->regs + LS2K_TSENSOR_CTRL_LO + reg_off);
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data->ctrl_hi_val = readw(data->regs + LS2K_TSENSOR_CTRL_HI + reg_off);
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writew(0, data->regs + LS2K_TSENSOR_CTRL_LO + reg_off);
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writew(0, data->regs + LS2K_TSENSOR_CTRL_HI + reg_off);
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return 0;
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}
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static int ls2k_thermal_resume(struct device *dev)
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{
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struct ls2k_thermal_data *data = dev_get_drvdata(dev);
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int reg_off = data->id * 2;
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writew(data->ctrl_low_val, data->regs + LS2K_TSENSOR_CTRL_LO + reg_off);
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writew(data->ctrl_hi_val, data->regs + LS2K_TSENSOR_CTRL_HI + reg_off);
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return 0;
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}
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#endif
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static SIMPLE_DEV_PM_OPS(ls2k_thermal_pm_ops,
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ls2k_thermal_suspend, ls2k_thermal_resume);
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static struct platform_driver ls2k_thermal_driver = {
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.driver = {
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.name = "ls2k_thermal",
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.pm = &ls2k_thermal_pm_ops,
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.of_match_table = of_ls2k_thermal_match,
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},
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.probe = ls2k_thermal_probe,
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.remove = ls2k_thermal_remove,
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};
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module_platform_driver(ls2k_thermal_driver);
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MODULE_DESCRIPTION("lonngson-2k thermal driver");
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MODULE_LICENSE("GPL v2");
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