| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Hans de Goede | 1508 | 86.47% | 4 | 40.00% |
| Chen-Yu Tsai | 195 | 11.18% | 2 | 20.00% |
| Jens Thiele | 35 | 2.01% | 1 | 10.00% |
| Sascha Hauer | 4 | 0.23% | 1 | 10.00% |
| Eduardo Valentin | 1 | 0.06% | 1 | 10.00% |
| Julia Lawall | 1 | 0.06% | 1 | 10.00% |
| Total | 1744 | 10 |
/* * Allwinner sunxi resistive touchscreen controller driver * * Copyright (C) 2013 - 2014 Hans de Goede <hdegoede@redhat.com> * * The hwmon parts are based on work by Corentin LABBE which is: * Copyright (C) 2013 Corentin LABBE <clabbe.montjoie@gmail.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ /* * The sun4i-ts controller is capable of detecting a second touch, but when a * second touch is present then the accuracy becomes so bad the reported touch * location is not useable. * * The original android driver contains some complicated heuristics using the * aprox. distance between the 2 touches to see if the user is making a pinch * open / close movement, and then reports emulated multi-touch events around * the last touch coordinate (as the dual-touch coordinates are worthless). * * These kinds of heuristics are just asking for trouble (and don't belong * in the kernel). So this driver offers straight forward, reliable single * touch functionality only. * * s.a. A20 User Manual "1.15 TP" (Documentation/arm/sunxi/README) * (looks like the description in the A20 User Manual v1.3 is better * than the one in the A10 User Manual v.1.5) */ #include <linux/err.h> #include <linux/hwmon.h> #include <linux/thermal.h> #include <linux/init.h> #include <linux/input.h> #include <linux/interrupt.h> #include <linux/io.h> #include <linux/module.h> #include <linux/of_platform.h> #include <linux/platform_device.h> #include <linux/slab.h> #define TP_CTRL0 0x00 #define TP_CTRL1 0x04 #define TP_CTRL2 0x08 #define TP_CTRL3 0x0c #define TP_INT_FIFOC 0x10 #define TP_INT_FIFOS 0x14 #define TP_TPR 0x18 #define TP_CDAT 0x1c #define TEMP_DATA 0x20 #define TP_DATA 0x24 /* TP_CTRL0 bits */ #define ADC_FIRST_DLY(x) ((x) << 24) /* 8 bits */ #define ADC_FIRST_DLY_MODE(x) ((x) << 23) #define ADC_CLK_SEL(x) ((x) << 22) #define ADC_CLK_DIV(x) ((x) << 20) /* 3 bits */ #define FS_DIV(x) ((x) << 16) /* 4 bits */ #define T_ACQ(x) ((x) << 0) /* 16 bits */ /* TP_CTRL1 bits */ #define STYLUS_UP_DEBOUN(x) ((x) << 12) /* 8 bits */ #define STYLUS_UP_DEBOUN_EN(x) ((x) << 9) #define TOUCH_PAN_CALI_EN(x) ((x) << 6) #define TP_DUAL_EN(x) ((x) << 5) #define TP_MODE_EN(x) ((x) << 4) #define TP_ADC_SELECT(x) ((x) << 3) #define ADC_CHAN_SELECT(x) ((x) << 0) /* 3 bits */ /* on sun6i, bits 3~6 are left shifted by 1 to 4~7 */ #define SUN6I_TP_MODE_EN(x) ((x) << 5) /* TP_CTRL2 bits */ #define TP_SENSITIVE_ADJUST(x) ((x) << 28) /* 4 bits */ #define TP_MODE_SELECT(x) ((x) << 26) /* 2 bits */ #define PRE_MEA_EN(x) ((x) << 24) #define PRE_MEA_THRE_CNT(x) ((x) << 0) /* 24 bits */ /* TP_CTRL3 bits */ #define FILTER_EN(x) ((x) << 2) #define FILTER_TYPE(x) ((x) << 0) /* 2 bits */ /* TP_INT_FIFOC irq and fifo mask / control bits */ #define TEMP_IRQ_EN(x) ((x) << 18) #define OVERRUN_IRQ_EN(x) ((x) << 17) #define DATA_IRQ_EN(x) ((x) << 16) #define TP_DATA_XY_CHANGE(x) ((x) << 13) #define FIFO_TRIG(x) ((x) << 8) /* 5 bits */ #define DATA_DRQ_EN(x) ((x) << 7) #define FIFO_FLUSH(x) ((x) << 4) #define TP_UP_IRQ_EN(x) ((x) << 1) #define TP_DOWN_IRQ_EN(x) ((x) << 0) /* TP_INT_FIFOS irq and fifo status bits */ #define TEMP_DATA_PENDING BIT(18) #define FIFO_OVERRUN_PENDING BIT(17) #define FIFO_DATA_PENDING BIT(16) #define TP_IDLE_FLG BIT(2) #define TP_UP_PENDING BIT(1) #define TP_DOWN_PENDING BIT(0) /* TP_TPR bits */ #define TEMP_ENABLE(x) ((x) << 16) #define TEMP_PERIOD(x) ((x) << 0) /* t = x * 256 * 16 / clkin */ struct sun4i_ts_data { struct device *dev; struct input_dev *input; void __iomem *base; unsigned int irq; bool ignore_fifo_data; int temp_data; int temp_offset; int temp_step; }; static void sun4i_ts_irq_handle_input(struct sun4i_ts_data *ts, u32 reg_val) { u32 x, y; if (reg_val & FIFO_DATA_PENDING) { x = readl(ts->base + TP_DATA); y = readl(ts->base + TP_DATA); /* The 1st location reported after an up event is unreliable */ if (!ts->ignore_fifo_data) { input_report_abs(ts->input, ABS_X, x); input_report_abs(ts->input, ABS_Y, y); /* * The hardware has a separate down status bit, but * that gets set before we get the first location, * resulting in reporting a click on the old location. */ input_report_key(ts->input, BTN_TOUCH, 1); input_sync(ts->input); } else { ts->ignore_fifo_data = false; } } if (reg_val & TP_UP_PENDING) { ts->ignore_fifo_data = true; input_report_key(ts->input, BTN_TOUCH, 0); input_sync(ts->input); } } static irqreturn_t sun4i_ts_irq(int irq, void *dev_id) { struct sun4i_ts_data *ts = dev_id; u32 reg_val; reg_val = readl(ts->base + TP_INT_FIFOS); if (reg_val & TEMP_DATA_PENDING) ts->temp_data = readl(ts->base + TEMP_DATA); if (ts->input) sun4i_ts_irq_handle_input(ts, reg_val); writel(reg_val, ts->base + TP_INT_FIFOS); return IRQ_HANDLED; } static int sun4i_ts_open(struct input_dev *dev) { struct sun4i_ts_data *ts = input_get_drvdata(dev); /* Flush, set trig level to 1, enable temp, data and up irqs */ writel(TEMP_IRQ_EN(1) | DATA_IRQ_EN(1) | FIFO_TRIG(1) | FIFO_FLUSH(1) | TP_UP_IRQ_EN(1), ts->base + TP_INT_FIFOC); return 0; } static void sun4i_ts_close(struct input_dev *dev) { struct sun4i_ts_data *ts = input_get_drvdata(dev); /* Deactivate all input IRQs */ writel(TEMP_IRQ_EN(1), ts->base + TP_INT_FIFOC); } static int sun4i_get_temp(const struct sun4i_ts_data *ts, int *temp) { /* No temp_data until the first irq */ if (ts->temp_data == -1) return -EAGAIN; *temp = ts->temp_data * ts->temp_step - ts->temp_offset; return 0; } static int sun4i_get_tz_temp(void *data, int *temp) { return sun4i_get_temp(data, temp); } static const struct thermal_zone_of_device_ops sun4i_ts_tz_ops = { .get_temp = sun4i_get_tz_temp, }; static ssize_t show_temp(struct device *dev, struct device_attribute *devattr, char *buf) { struct sun4i_ts_data *ts = dev_get_drvdata(dev); int temp; int error; error = sun4i_get_temp(ts, &temp); if (error) return error; return sprintf(buf, "%d\n", temp); } static ssize_t show_temp_label(struct device *dev, struct device_attribute *devattr, char *buf) { return sprintf(buf, "SoC temperature\n"); } static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL); static DEVICE_ATTR(temp1_label, S_IRUGO, show_temp_label, NULL); static struct attribute *sun4i_ts_attrs[] = { &dev_attr_temp1_input.attr, &dev_attr_temp1_label.attr, NULL }; ATTRIBUTE_GROUPS(sun4i_ts); static int sun4i_ts_probe(struct platform_device *pdev) { struct sun4i_ts_data *ts; struct device *dev = &pdev->dev; struct device_node *np = dev->of_node; struct device *hwmon; int error; u32 reg; bool ts_attached; u32 tp_sensitive_adjust = 15; u32 filter_type = 1; ts = devm_kzalloc(dev, sizeof(struct sun4i_ts_data), GFP_KERNEL); if (!ts) return -ENOMEM; ts->dev = dev; ts->ignore_fifo_data = true; ts->temp_data = -1; if (of_device_is_compatible(np, "allwinner,sun6i-a31-ts")) { /* Allwinner SDK has temperature (C) = (value / 6) - 271 */ ts->temp_offset = 271000; ts->temp_step = 167; } else if (of_device_is_compatible(np, "allwinner,sun4i-a10-ts")) { /* * The A10 temperature sensor has quite a wide spread, these * parameters are based on the averaging of the calibration * results of 4 completely different boards, with a spread of * temp_step from 0.096 - 0.170 and temp_offset from 176 - 331. */ ts->temp_offset = 257000; ts->temp_step = 133; } else { /* * The user manuals do not contain the formula for calculating * the temperature. The formula used here is from the AXP209, * which is designed by X-Powers, an affiliate of Allwinner: * * temperature (C) = (value * 0.1) - 144.7 * * Allwinner does not have any documentation whatsoever for * this hardware. Moreover, it is claimed that the sensor * is inaccurate and cannot work properly. */ ts->temp_offset = 144700; ts->temp_step = 100; } ts_attached = of_property_read_bool(np, "allwinner,ts-attached"); if (ts_attached) { ts->input = devm_input_allocate_device(dev); if (!ts->input) return -ENOMEM; ts->input->name = pdev->name; ts->input->phys = "sun4i_ts/input0"; ts->input->open = sun4i_ts_open; ts->input->close = sun4i_ts_close; ts->input->id.bustype = BUS_HOST; ts->input->id.vendor = 0x0001; ts->input->id.product = 0x0001; ts->input->id.version = 0x0100; ts->input->evbit[0] = BIT(EV_SYN) | BIT(EV_KEY) | BIT(EV_ABS); __set_bit(BTN_TOUCH, ts->input->keybit); input_set_abs_params(ts->input, ABS_X, 0, 4095, 0, 0); input_set_abs_params(ts->input, ABS_Y, 0, 4095, 0, 0); input_set_drvdata(ts->input, ts); } ts->base = devm_ioremap_resource(dev, platform_get_resource(pdev, IORESOURCE_MEM, 0)); if (IS_ERR(ts->base)) return PTR_ERR(ts->base); ts->irq = platform_get_irq(pdev, 0); error = devm_request_irq(dev, ts->irq, sun4i_ts_irq, 0, "sun4i-ts", ts); if (error) return error; /* * Select HOSC clk, clkin = clk / 6, adc samplefreq = clkin / 8192, * t_acq = clkin / (16 * 64) */ writel(ADC_CLK_SEL(0) | ADC_CLK_DIV(2) | FS_DIV(7) | T_ACQ(63), ts->base + TP_CTRL0); /* * tp_sensitive_adjust is an optional property * tp_mode = 0 : only x and y coordinates, as we don't use dual touch */ of_property_read_u32(np, "allwinner,tp-sensitive-adjust", &tp_sensitive_adjust); writel(TP_SENSITIVE_ADJUST(tp_sensitive_adjust) | TP_MODE_SELECT(0), ts->base + TP_CTRL2); /* * Enable median and averaging filter, optional property for * filter type. */ of_property_read_u32(np, "allwinner,filter-type", &filter_type); writel(FILTER_EN(1) | FILTER_TYPE(filter_type), ts->base + TP_CTRL3); /* Enable temperature measurement, period 1953 (2 seconds) */ writel(TEMP_ENABLE(1) | TEMP_PERIOD(1953), ts->base + TP_TPR); /* * Set stylus up debounce to aprox 10 ms, enable debounce, and * finally enable tp mode. */ reg = STYLUS_UP_DEBOUN(5) | STYLUS_UP_DEBOUN_EN(1); if (of_device_is_compatible(np, "allwinner,sun6i-a31-ts")) reg |= SUN6I_TP_MODE_EN(1); else reg |= TP_MODE_EN(1); writel(reg, ts->base + TP_CTRL1); /* * The thermal core does not register hwmon devices for DT-based * thermal zone sensors, such as this one. */ hwmon = devm_hwmon_device_register_with_groups(ts->dev, "sun4i_ts", ts, sun4i_ts_groups); if (IS_ERR(hwmon)) return PTR_ERR(hwmon); devm_thermal_zone_of_sensor_register(ts->dev, 0, ts, &sun4i_ts_tz_ops); writel(TEMP_IRQ_EN(1), ts->base + TP_INT_FIFOC); if (ts_attached) { error = input_register_device(ts->input); if (error) { writel(0, ts->base + TP_INT_FIFOC); return error; } } platform_set_drvdata(pdev, ts); return 0; } static int sun4i_ts_remove(struct platform_device *pdev) { struct sun4i_ts_data *ts = platform_get_drvdata(pdev); /* Explicit unregister to avoid open/close changing the imask later */ if (ts->input) input_unregister_device(ts->input); /* Deactivate all IRQs */ writel(0, ts->base + TP_INT_FIFOC); return 0; } static const struct of_device_id sun4i_ts_of_match[] = { { .compatible = "allwinner,sun4i-a10-ts", }, { .compatible = "allwinner,sun5i-a13-ts", }, { .compatible = "allwinner,sun6i-a31-ts", }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, sun4i_ts_of_match); static struct platform_driver sun4i_ts_driver = { .driver = { .name = "sun4i-ts", .of_match_table = of_match_ptr(sun4i_ts_of_match), }, .probe = sun4i_ts_probe, .remove = sun4i_ts_remove, }; module_platform_driver(sun4i_ts_driver); MODULE_DESCRIPTION("Allwinner sun4i resistive touchscreen controller driver"); MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>"); MODULE_LICENSE("GPL");
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