diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.19/950-0418-Input-ili210x-fetch-touchscreen-geometry-from-DT.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.19/950-0418-Input-ili210x-fetch-touchscreen-geometry-from-DT.patch | 490 |
1 files changed, 490 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.19/950-0418-Input-ili210x-fetch-touchscreen-geometry-from-DT.patch b/target/linux/brcm2708/patches-4.19/950-0418-Input-ili210x-fetch-touchscreen-geometry-from-DT.patch new file mode 100644 index 0000000000..412400e14e --- /dev/null +++ b/target/linux/brcm2708/patches-4.19/950-0418-Input-ili210x-fetch-touchscreen-geometry-from-DT.patch @@ -0,0 +1,490 @@ +From 7b8839dc268225574109471283cd7c38618b68f2 Mon Sep 17 00:00:00 2001 +From: Samuel Hsu <hsu@distec.de> +Date: Mon, 8 Apr 2019 16:42:17 +0200 +Subject: [PATCH 418/773] Input: ili210x - fetch touchscreen geometry from DT + +commit f67cc3e927d8414ad3872e046764534ea1f5db0d upstream + +Fetching the geometry from the ILI251x registers seems unreliable and +sometimes returns all zeroes. Add support for fetching the geometry and +axis inversion from DT instead. + +Signed-off-by: Marek Vasut <marex@denx.de> +Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> +--- + drivers/input/touchscreen/ili210x.c | 321 +++++++++++++++++----------- + 1 file changed, 194 insertions(+), 127 deletions(-) + +--- a/drivers/input/touchscreen/ili210x.c ++++ b/drivers/input/touchscreen/ili210x.c +@@ -4,11 +4,15 @@ + #include <linux/slab.h> + #include <linux/input.h> + #include <linux/input/mt.h> ++#include <linux/input/touchscreen.h> + #include <linux/delay.h> + #include <linux/workqueue.h> +-#include <linux/input/ili210x.h> ++#include <linux/gpio/consumer.h> ++#include <linux/of_device.h> ++#include <asm/unaligned.h> + +-#define MAX_TOUCHES 2 ++#define ILI210X_TOUCHES 2 ++#define ILI251X_TOUCHES 10 + #define DEFAULT_POLL_PERIOD 20 + + /* Touchscreen commands */ +@@ -17,41 +21,32 @@ + #define REG_FIRMWARE_VERSION 0x40 + #define REG_CALIBRATE 0xcc + +-struct finger { +- u8 x_low; +- u8 x_high; +- u8 y_low; +- u8 y_high; +-} __packed; +- +-struct touchdata { +- u8 status; +- struct finger finger[MAX_TOUCHES]; +-} __packed; +- +-struct panel_info { +- struct finger finger_max; +- u8 xchannel_num; +- u8 ychannel_num; +-} __packed; +- + struct firmware_version { + u8 id; + u8 major; + u8 minor; + } __packed; + ++enum ili2xxx_model { ++ MODEL_ILI210X, ++ MODEL_ILI251X, ++}; ++ + struct ili210x { + struct i2c_client *client; + struct input_dev *input; +- bool (*get_pendown_state)(void); + unsigned int poll_period; + struct delayed_work dwork; ++ struct gpio_desc *reset_gpio; ++ struct touchscreen_properties prop; ++ enum ili2xxx_model model; ++ unsigned int max_touches; + }; + + static int ili210x_read_reg(struct i2c_client *client, u8 reg, void *buf, + size_t len) + { ++ struct ili210x *priv = i2c_get_clientdata(client); + struct i2c_msg msg[2] = { + { + .addr = client->addr, +@@ -67,7 +62,38 @@ static int ili210x_read_reg(struct i2c_c + } + }; + +- if (i2c_transfer(client->adapter, msg, 2) != 2) { ++ if (priv->model == MODEL_ILI251X) { ++ if (i2c_transfer(client->adapter, msg, 1) != 1) { ++ dev_err(&client->dev, "i2c transfer failed\n"); ++ return -EIO; ++ } ++ ++ usleep_range(5000, 5500); ++ ++ if (i2c_transfer(client->adapter, msg + 1, 1) != 1) { ++ dev_err(&client->dev, "i2c transfer failed\n"); ++ return -EIO; ++ } ++ } else { ++ if (i2c_transfer(client->adapter, msg, 2) != 2) { ++ dev_err(&client->dev, "i2c transfer failed\n"); ++ return -EIO; ++ } ++ } ++ ++ return 0; ++} ++ ++static int ili210x_read(struct i2c_client *client, void *buf, size_t len) ++{ ++ struct i2c_msg msg = { ++ .addr = client->addr, ++ .flags = I2C_M_RD, ++ .len = len, ++ .buf = buf, ++ }; ++ ++ if (i2c_transfer(client->adapter, &msg, 1) != 1) { + dev_err(&client->dev, "i2c transfer failed\n"); + return -EIO; + } +@@ -75,42 +101,72 @@ static int ili210x_read_reg(struct i2c_c + return 0; + } + +-static void ili210x_report_events(struct input_dev *input, +- const struct touchdata *touchdata) ++static bool ili210x_touchdata_to_coords(struct ili210x *priv, u8 *touchdata, ++ unsigned int finger, ++ unsigned int *x, unsigned int *y) + { +- int i; +- bool touch; +- unsigned int x, y; +- const struct finger *finger; ++ if (finger >= ILI210X_TOUCHES) ++ return false; + +- for (i = 0; i < MAX_TOUCHES; i++) { +- input_mt_slot(input, i); ++ if (touchdata[0] & BIT(finger)) ++ return false; + +- finger = &touchdata->finger[i]; ++ *x = get_unaligned_be16(touchdata + 1 + (finger * 4) + 0); ++ *y = get_unaligned_be16(touchdata + 1 + (finger * 4) + 2); + +- touch = touchdata->status & (1 << i); +- input_mt_report_slot_state(input, MT_TOOL_FINGER, touch); +- if (touch) { +- x = finger->x_low | (finger->x_high << 8); +- y = finger->y_low | (finger->y_high << 8); ++ return true; ++} ++ ++static bool ili251x_touchdata_to_coords(struct ili210x *priv, u8 *touchdata, ++ unsigned int finger, ++ unsigned int *x, unsigned int *y) ++{ ++ if (finger >= ILI251X_TOUCHES) ++ return false; ++ ++ *x = get_unaligned_be16(touchdata + 1 + (finger * 5) + 0); ++ if (!(*x & BIT(15))) /* Touch indication */ ++ return false; ++ ++ *x &= 0x3fff; ++ *y = get_unaligned_be16(touchdata + 1 + (finger * 5) + 2); ++ ++ return true; ++} ++ ++static bool ili210x_report_events(struct ili210x *priv, u8 *touchdata) ++{ ++ struct input_dev *input = priv->input; ++ int i; ++ bool contact = false, touch = false; ++ unsigned int x = 0, y = 0; + +- input_report_abs(input, ABS_MT_POSITION_X, x); +- input_report_abs(input, ABS_MT_POSITION_Y, y); ++ for (i = 0; i < priv->max_touches; i++) { ++ if (priv->model == MODEL_ILI210X) { ++ touch = ili210x_touchdata_to_coords(priv, touchdata, ++ i, &x, &y); ++ } else if (priv->model == MODEL_ILI251X) { ++ touch = ili251x_touchdata_to_coords(priv, touchdata, ++ i, &x, &y); ++ if (touch) ++ contact = true; + } ++ ++ input_mt_slot(input, i); ++ input_mt_report_slot_state(input, MT_TOOL_FINGER, touch); ++ if (!touch) ++ continue; ++ touchscreen_report_pos(input, &priv->prop, x, y, ++ true); + } + + input_mt_report_pointer_emulation(input, false); + input_sync(input); +-} + +-static bool get_pendown_state(const struct ili210x *priv) +-{ +- bool state = false; +- +- if (priv->get_pendown_state) +- state = priv->get_pendown_state(); ++ if (priv->model == MODEL_ILI210X) ++ contact = touchdata[0] & 0xf3; + +- return state; ++ return contact; + } + + static void ili210x_work(struct work_struct *work) +@@ -118,20 +174,29 @@ static void ili210x_work(struct work_str + struct ili210x *priv = container_of(work, struct ili210x, + dwork.work); + struct i2c_client *client = priv->client; +- struct touchdata touchdata; +- int error; ++ u8 touchdata[64] = { 0 }; ++ bool touch; ++ int error = -EINVAL; ++ ++ if (priv->model == MODEL_ILI210X) { ++ error = ili210x_read_reg(client, REG_TOUCHDATA, ++ touchdata, sizeof(touchdata)); ++ } else if (priv->model == MODEL_ILI251X) { ++ error = ili210x_read_reg(client, REG_TOUCHDATA, ++ touchdata, 31); ++ if (!error && touchdata[0] == 2) ++ error = ili210x_read(client, &touchdata[31], 20); ++ } + +- error = ili210x_read_reg(client, REG_TOUCHDATA, +- &touchdata, sizeof(touchdata)); + if (error) { + dev_err(&client->dev, + "Unable to get touchdata, err = %d\n", error); + return; + } + +- ili210x_report_events(priv->input, &touchdata); ++ touch = ili210x_report_events(priv, touchdata); + +- if ((touchdata.status & 0xf3) || get_pendown_state(priv)) ++ if (touch) + schedule_delayed_work(&priv->dwork, + msecs_to_jiffies(priv->poll_period)); + } +@@ -180,30 +245,76 @@ static const struct attribute_group ili2 + .attrs = ili210x_attributes, + }; + ++static void ili210x_power_down(void *data) ++{ ++ struct gpio_desc *reset_gpio = data; ++ ++ gpiod_set_value_cansleep(reset_gpio, 1); ++} ++ ++static void ili210x_cancel_work(void *data) ++{ ++ struct ili210x *priv = data; ++ ++ cancel_delayed_work_sync(&priv->dwork); ++} ++ + static int ili210x_i2c_probe(struct i2c_client *client, + const struct i2c_device_id *id) + { + struct device *dev = &client->dev; +- const struct ili210x_platform_data *pdata = dev_get_platdata(dev); + struct ili210x *priv; ++ struct gpio_desc *reset_gpio; + struct input_dev *input; +- struct panel_info panel; + struct firmware_version firmware; +- int xmax, ymax; ++ enum ili2xxx_model model; + int error; + +- dev_dbg(dev, "Probing for ILI210X I2C Touschreen driver"); ++ model = (enum ili2xxx_model)id->driver_data; + +- if (!pdata) { +- dev_err(dev, "No platform data!\n"); +- return -EINVAL; +- } ++ dev_dbg(dev, "Probing for ILI210X I2C Touschreen driver"); + + if (client->irq <= 0) { + dev_err(dev, "No IRQ!\n"); + return -EINVAL; + } + ++ reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH); ++ if (IS_ERR(reset_gpio)) ++ return PTR_ERR(reset_gpio); ++ ++ if (reset_gpio) { ++ error = devm_add_action_or_reset(dev, ili210x_power_down, ++ reset_gpio); ++ if (error) ++ return error; ++ ++ usleep_range(50, 100); ++ gpiod_set_value_cansleep(reset_gpio, 0); ++ msleep(100); ++ } ++ ++ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); ++ if (!priv) ++ return -ENOMEM; ++ ++ input = devm_input_allocate_device(dev); ++ if (!input) ++ return -ENOMEM; ++ ++ priv->client = client; ++ priv->input = input; ++ priv->poll_period = DEFAULT_POLL_PERIOD; ++ INIT_DELAYED_WORK(&priv->dwork, ili210x_work); ++ priv->reset_gpio = reset_gpio; ++ priv->model = model; ++ if (model == MODEL_ILI210X) ++ priv->max_touches = ILI210X_TOUCHES; ++ if (model == MODEL_ILI251X) ++ priv->max_touches = ILI251X_TOUCHES; ++ ++ i2c_set_clientdata(client, priv); ++ + /* Get firmware version */ + error = ili210x_read_reg(client, REG_FIRMWARE_VERSION, + &firmware, sizeof(firmware)); +@@ -213,70 +324,40 @@ static int ili210x_i2c_probe(struct i2c_ + return error; + } + +- /* get panel info */ +- error = ili210x_read_reg(client, REG_PANEL_INFO, &panel, sizeof(panel)); +- if (error) { +- dev_err(dev, "Failed to get panel information, err: %d\n", +- error); +- return error; +- } +- +- xmax = panel.finger_max.x_low | (panel.finger_max.x_high << 8); +- ymax = panel.finger_max.y_low | (panel.finger_max.y_high << 8); +- +- priv = kzalloc(sizeof(*priv), GFP_KERNEL); +- input = input_allocate_device(); +- if (!priv || !input) { +- error = -ENOMEM; +- goto err_free_mem; +- } +- +- priv->client = client; +- priv->input = input; +- priv->get_pendown_state = pdata->get_pendown_state; +- priv->poll_period = pdata->poll_period ? : DEFAULT_POLL_PERIOD; +- INIT_DELAYED_WORK(&priv->dwork, ili210x_work); +- + /* Setup input device */ + input->name = "ILI210x Touchscreen"; + input->id.bustype = BUS_I2C; + input->dev.parent = dev; + +- __set_bit(EV_SYN, input->evbit); +- __set_bit(EV_KEY, input->evbit); +- __set_bit(EV_ABS, input->evbit); +- __set_bit(BTN_TOUCH, input->keybit); +- +- /* Single touch */ +- input_set_abs_params(input, ABS_X, 0, xmax, 0, 0); +- input_set_abs_params(input, ABS_Y, 0, ymax, 0, 0); +- + /* Multi touch */ +- input_mt_init_slots(input, MAX_TOUCHES, 0); +- input_set_abs_params(input, ABS_MT_POSITION_X, 0, xmax, 0, 0); +- input_set_abs_params(input, ABS_MT_POSITION_Y, 0, ymax, 0, 0); ++ input_set_abs_params(input, ABS_MT_POSITION_X, 0, 0xffff, 0, 0); ++ input_set_abs_params(input, ABS_MT_POSITION_Y, 0, 0xffff, 0, 0); ++ touchscreen_parse_properties(input, true, &priv->prop); ++ input_mt_init_slots(input, priv->max_touches, INPUT_MT_DIRECT); + +- i2c_set_clientdata(client, priv); ++ error = devm_add_action(dev, ili210x_cancel_work, priv); ++ if (error) ++ return error; + +- error = request_irq(client->irq, ili210x_irq, pdata->irq_flags, +- client->name, priv); ++ error = devm_request_irq(dev, client->irq, ili210x_irq, 0, ++ client->name, priv); + if (error) { + dev_err(dev, "Unable to request touchscreen IRQ, err: %d\n", + error); +- goto err_free_mem; ++ return error; + } + +- error = sysfs_create_group(&dev->kobj, &ili210x_attr_group); ++ error = devm_device_add_group(dev, &ili210x_attr_group); + if (error) { + dev_err(dev, "Unable to create sysfs attributes, err: %d\n", + error); +- goto err_free_irq; ++ return error; + } + + error = input_register_device(priv->input); + if (error) { + dev_err(dev, "Cannot register input device, err: %d\n", error); +- goto err_remove_sysfs; ++ return error; + } + + device_init_wakeup(dev, 1); +@@ -286,28 +367,6 @@ static int ili210x_i2c_probe(struct i2c_ + client->irq, firmware.id, firmware.major, firmware.minor); + + return 0; +- +-err_remove_sysfs: +- sysfs_remove_group(&dev->kobj, &ili210x_attr_group); +-err_free_irq: +- free_irq(client->irq, priv); +-err_free_mem: +- input_free_device(input); +- kfree(priv); +- return error; +-} +- +-static int ili210x_i2c_remove(struct i2c_client *client) +-{ +- struct ili210x *priv = i2c_get_clientdata(client); +- +- sysfs_remove_group(&client->dev.kobj, &ili210x_attr_group); +- free_irq(priv->client->irq, priv); +- cancel_delayed_work_sync(&priv->dwork); +- input_unregister_device(priv->input); +- kfree(priv); +- +- return 0; + } + + static int __maybe_unused ili210x_i2c_suspend(struct device *dev) +@@ -334,19 +393,27 @@ static SIMPLE_DEV_PM_OPS(ili210x_i2c_pm, + ili210x_i2c_suspend, ili210x_i2c_resume); + + static const struct i2c_device_id ili210x_i2c_id[] = { +- { "ili210x", 0 }, ++ { "ili210x", MODEL_ILI210X }, ++ { "ili251x", MODEL_ILI251X }, + { } + }; + MODULE_DEVICE_TABLE(i2c, ili210x_i2c_id); + ++static const struct of_device_id ili210x_dt_ids[] = { ++ { .compatible = "ilitek,ili210x", .data = (void *)MODEL_ILI210X }, ++ { .compatible = "ilitek,ili251x", .data = (void *)MODEL_ILI251X }, ++ { }, ++}; ++MODULE_DEVICE_TABLE(of, ili210x_dt_ids); ++ + static struct i2c_driver ili210x_ts_driver = { + .driver = { + .name = "ili210x_i2c", + .pm = &ili210x_i2c_pm, ++ .of_match_table = ili210x_dt_ids, + }, + .id_table = ili210x_i2c_id, + .probe = ili210x_i2c_probe, +- .remove = ili210x_i2c_remove, + }; + + module_i2c_driver(ili210x_ts_driver); |