diff options
Diffstat (limited to 'drivers/input/touchscreen/edt-ft5x06.c')
-rw-r--r-- | drivers/input/touchscreen/edt-ft5x06.c | 246 |
1 files changed, 94 insertions, 152 deletions
diff --git a/drivers/input/touchscreen/edt-ft5x06.c b/drivers/input/touchscreen/edt-ft5x06.c index 48de1e8b3c93..0b0f8c17f3f7 100644 --- a/drivers/input/touchscreen/edt-ft5x06.c +++ b/drivers/input/touchscreen/edt-ft5x06.c @@ -27,6 +27,7 @@ #include <linux/module.h> #include <linux/ratelimit.h> +#include <linux/irq.h> #include <linux/interrupt.h> #include <linux/input.h> #include <linux/i2c.h> @@ -34,13 +35,10 @@ #include <linux/delay.h> #include <linux/debugfs.h> #include <linux/slab.h> -#include <linux/gpio.h> -#include <linux/of_gpio.h> +#include <linux/gpio/consumer.h> #include <linux/input/mt.h> #include <linux/input/touchscreen.h> -#include <linux/input/edt-ft5x06.h> - -#define MAX_SUPPORT_POINTS 5 +#include <linux/of_device.h> #define WORK_REGISTER_THRESHOLD 0x00 #define WORK_REGISTER_REPORT_RATE 0x08 @@ -91,9 +89,8 @@ struct edt_ft5x06_ts_data { u16 num_x; u16 num_y; - int reset_pin; - int irq_pin; - int wake_pin; + struct gpio_desc *reset_gpio; + struct gpio_desc *wake_gpio; #if defined(CONFIG_DEBUG_FS) struct dentry *debug_dir; @@ -107,6 +104,7 @@ struct edt_ft5x06_ts_data { int gain; int offset; int report_rate; + int max_support_points; char name[EDT_NAME_LEN]; @@ -114,6 +112,10 @@ struct edt_ft5x06_ts_data { enum edt_ver version; }; +struct edt_i2c_chip_data { + int max_support_points; +}; + static int edt_ft5x06_ts_readwrite(struct i2c_client *client, u16 wr_len, u8 *wr_buf, u16 rd_len, u8 *rd_buf) @@ -170,9 +172,9 @@ static irqreturn_t edt_ft5x06_ts_isr(int irq, void *dev_id) struct edt_ft5x06_ts_data *tsdata = dev_id; struct device *dev = &tsdata->client->dev; u8 cmd; - u8 rdbuf[29]; + u8 rdbuf[63]; int i, type, x, y, id; - int offset, tplen, datalen; + int offset, tplen, datalen, crclen; int error; switch (tsdata->version) { @@ -180,14 +182,14 @@ static irqreturn_t edt_ft5x06_ts_isr(int irq, void *dev_id) cmd = 0xf9; /* tell the controller to send touch data */ offset = 5; /* where the actual touch data starts */ tplen = 4; /* data comes in so called frames */ - datalen = 26; /* how much bytes to listen for */ + crclen = 1; /* length of the crc data */ break; case M09: - cmd = 0x02; - offset = 1; + cmd = 0x0; + offset = 3; tplen = 6; - datalen = 29; + crclen = 0; break; default: @@ -195,6 +197,7 @@ static irqreturn_t edt_ft5x06_ts_isr(int irq, void *dev_id) } memset(rdbuf, 0, sizeof(rdbuf)); + datalen = tplen * tsdata->max_support_points + offset + crclen; error = edt_ft5x06_ts_readwrite(tsdata->client, sizeof(cmd), &cmd, @@ -219,7 +222,7 @@ static irqreturn_t edt_ft5x06_ts_isr(int irq, void *dev_id) goto out; } - for (i = 0; i < MAX_SUPPORT_POINTS; i++) { + for (i = 0; i < tsdata->max_support_points; i++) { u8 *buf = &rdbuf[i * tplen + offset]; bool down; @@ -752,45 +755,6 @@ edt_ft5x06_ts_teardown_debugfs(struct edt_ft5x06_ts_data *tsdata) #endif /* CONFIG_DEBUGFS */ -static int edt_ft5x06_ts_reset(struct i2c_client *client, - struct edt_ft5x06_ts_data *tsdata) -{ - int error; - - if (gpio_is_valid(tsdata->wake_pin)) { - error = devm_gpio_request_one(&client->dev, - tsdata->wake_pin, GPIOF_OUT_INIT_LOW, - "edt-ft5x06 wake"); - if (error) { - dev_err(&client->dev, - "Failed to request GPIO %d as wake pin, error %d\n", - tsdata->wake_pin, error); - return error; - } - - msleep(5); - gpio_set_value(tsdata->wake_pin, 1); - } - if (gpio_is_valid(tsdata->reset_pin)) { - /* this pulls reset down, enabling the low active reset */ - error = devm_gpio_request_one(&client->dev, - tsdata->reset_pin, GPIOF_OUT_INIT_LOW, - "edt-ft5x06 reset"); - if (error) { - dev_err(&client->dev, - "Failed to request GPIO %d as reset pin, error %d\n", - tsdata->reset_pin, error); - return error; - } - - msleep(5); - gpio_set_value(tsdata->reset_pin, 1); - msleep(300); - } - - return 0; -} - static int edt_ft5x06_ts_identify(struct i2c_client *client, struct edt_ft5x06_ts_data *tsdata, char *fw_version) @@ -850,44 +814,24 @@ static int edt_ft5x06_ts_identify(struct i2c_client *client, return 0; } -#define EDT_ATTR_CHECKSET(name, reg) \ -do { \ - if (pdata->name >= edt_ft5x06_attr_##name.limit_low && \ - pdata->name <= edt_ft5x06_attr_##name.limit_high) \ - edt_ft5x06_register_write(tsdata, reg, pdata->name); \ -} while (0) - -#define EDT_GET_PROP(name, reg) { \ - u32 val; \ - if (of_property_read_u32(np, #name, &val) == 0) \ - edt_ft5x06_register_write(tsdata, reg, val); \ -} - -static void edt_ft5x06_ts_get_dt_defaults(struct device_node *np, - struct edt_ft5x06_ts_data *tsdata) +static void edt_ft5x06_ts_get_defaults(struct device *dev, + struct edt_ft5x06_ts_data *tsdata) { struct edt_reg_addr *reg_addr = &tsdata->reg_addr; + u32 val; + int error; - EDT_GET_PROP(threshold, reg_addr->reg_threshold); - EDT_GET_PROP(gain, reg_addr->reg_gain); - EDT_GET_PROP(offset, reg_addr->reg_offset); -} + error = device_property_read_u32(dev, "threshold", &val); + if (!error) + reg_addr->reg_threshold = val; -static void -edt_ft5x06_ts_get_defaults(struct edt_ft5x06_ts_data *tsdata, - const struct edt_ft5x06_platform_data *pdata) -{ - struct edt_reg_addr *reg_addr = &tsdata->reg_addr; - - if (!pdata->use_parameters) - return; + error = device_property_read_u32(dev, "gain", &val); + if (!error) + reg_addr->reg_gain = val; - /* pick up defaults from the platform data */ - EDT_ATTR_CHECKSET(threshold, reg_addr->reg_threshold); - EDT_ATTR_CHECKSET(gain, reg_addr->reg_gain); - EDT_ATTR_CHECKSET(offset, reg_addr->reg_offset); - if (reg_addr->reg_report_rate != NO_REGISTER) - EDT_ATTR_CHECKSET(report_rate, reg_addr->reg_report_rate); + error = device_property_read_u32(dev, "offset", &val); + if (!error) + reg_addr->reg_offset = val; } static void @@ -931,37 +875,13 @@ edt_ft5x06_ts_set_regs(struct edt_ft5x06_ts_data *tsdata) } } -#ifdef CONFIG_OF -static int edt_ft5x06_i2c_ts_probe_dt(struct device *dev, - struct edt_ft5x06_ts_data *tsdata) -{ - struct device_node *np = dev->of_node; - - /* - * irq_pin is not needed for DT setup. - * irq is associated via 'interrupts' property in DT - */ - tsdata->irq_pin = -EINVAL; - tsdata->reset_pin = of_get_named_gpio(np, "reset-gpios", 0); - tsdata->wake_pin = of_get_named_gpio(np, "wake-gpios", 0); - - return 0; -} -#else -static inline int edt_ft5x06_i2c_ts_probe_dt(struct device *dev, - struct edt_ft5x06_ts_data *tsdata) -{ - return -ENODEV; -} -#endif - static int edt_ft5x06_ts_probe(struct i2c_client *client, const struct i2c_device_id *id) { - const struct edt_ft5x06_platform_data *pdata = - dev_get_platdata(&client->dev); + const struct edt_i2c_chip_data *chip_data; struct edt_ft5x06_ts_data *tsdata; struct input_dev *input; + unsigned long irq_flags; int error; char fw_version[EDT_NAME_LEN]; @@ -973,32 +893,43 @@ static int edt_ft5x06_ts_probe(struct i2c_client *client, return -ENOMEM; } - if (!pdata) { - error = edt_ft5x06_i2c_ts_probe_dt(&client->dev, tsdata); - if (error) { - dev_err(&client->dev, - "DT probe failed and no platform data present\n"); - return error; - } - } else { - tsdata->reset_pin = pdata->reset_pin; - tsdata->irq_pin = pdata->irq_pin; - tsdata->wake_pin = -EINVAL; + chip_data = of_device_get_match_data(&client->dev); + if (!chip_data) + chip_data = (const struct edt_i2c_chip_data *)id->driver_data; + if (!chip_data || !chip_data->max_support_points) { + dev_err(&client->dev, "invalid or missing chip data\n"); + return -EINVAL; } - error = edt_ft5x06_ts_reset(client, tsdata); - if (error) + tsdata->max_support_points = chip_data->max_support_points; + + tsdata->reset_gpio = devm_gpiod_get_optional(&client->dev, + "reset", GPIOD_OUT_HIGH); + if (IS_ERR(tsdata->reset_gpio)) { + error = PTR_ERR(tsdata->reset_gpio); + dev_err(&client->dev, + "Failed to request GPIO reset pin, error %d\n", error); + return error; + } + + tsdata->wake_gpio = devm_gpiod_get_optional(&client->dev, + "wake", GPIOD_OUT_LOW); + if (IS_ERR(tsdata->wake_gpio)) { + error = PTR_ERR(tsdata->wake_gpio); + dev_err(&client->dev, + "Failed to request GPIO wake pin, error %d\n", error); return error; + } - if (gpio_is_valid(tsdata->irq_pin)) { - error = devm_gpio_request_one(&client->dev, tsdata->irq_pin, - GPIOF_IN, "edt-ft5x06 irq"); - if (error) { - dev_err(&client->dev, - "Failed to request GPIO %d, error %d\n", - tsdata->irq_pin, error); - return error; - } + if (tsdata->wake_gpio) { + usleep_range(5000, 6000); + gpiod_set_value_cansleep(tsdata->wake_gpio, 1); + } + + if (tsdata->reset_gpio) { + usleep_range(5000, 6000); + gpiod_set_value_cansleep(tsdata->reset_gpio, 0); + msleep(300); } input = devm_input_allocate_device(&client->dev); @@ -1019,12 +950,7 @@ static int edt_ft5x06_ts_probe(struct i2c_client *client, } edt_ft5x06_ts_set_regs(tsdata); - - if (!pdata) - edt_ft5x06_ts_get_dt_defaults(client->dev.of_node, tsdata); - else - edt_ft5x06_ts_get_defaults(tsdata, pdata); - + edt_ft5x06_ts_get_defaults(&client->dev, tsdata); edt_ft5x06_ts_get_parameters(tsdata); dev_dbg(&client->dev, @@ -1040,10 +966,10 @@ static int edt_ft5x06_ts_probe(struct i2c_client *client, input_set_abs_params(input, ABS_MT_POSITION_Y, 0, tsdata->num_y * 64 - 1, 0, 0); - if (!pdata) - touchscreen_parse_properties(input, true); + touchscreen_parse_properties(input, true); - error = input_mt_init_slots(input, MAX_SUPPORT_POINTS, INPUT_MT_DIRECT); + error = input_mt_init_slots(input, tsdata->max_support_points, + INPUT_MT_DIRECT); if (error) { dev_err(&client->dev, "Unable to init MT slots.\n"); return error; @@ -1052,9 +978,13 @@ static int edt_ft5x06_ts_probe(struct i2c_client *client, input_set_drvdata(input, tsdata); i2c_set_clientdata(client, tsdata); - error = devm_request_threaded_irq(&client->dev, client->irq, NULL, - edt_ft5x06_ts_isr, - IRQF_TRIGGER_FALLING | IRQF_ONESHOT, + irq_flags = irq_get_trigger_type(client->irq); + if (irq_flags == IRQF_TRIGGER_NONE) + irq_flags = IRQF_TRIGGER_FALLING; + irq_flags |= IRQF_ONESHOT; + + error = devm_request_threaded_irq(&client->dev, client->irq, + NULL, edt_ft5x06_ts_isr, irq_flags, client->name, tsdata); if (error) { dev_err(&client->dev, "Unable to request touchscreen IRQ.\n"); @@ -1074,7 +1004,9 @@ static int edt_ft5x06_ts_probe(struct i2c_client *client, dev_dbg(&client->dev, "EDT FT5x06 initialized: IRQ %d, WAKE pin %d, Reset pin %d.\n", - client->irq, tsdata->wake_pin, tsdata->reset_pin); + client->irq, + tsdata->wake_gpio ? desc_to_gpio(tsdata->wake_gpio) : -1, + tsdata->reset_gpio ? desc_to_gpio(tsdata->reset_gpio) : -1); return 0; @@ -1116,17 +1048,27 @@ static int __maybe_unused edt_ft5x06_ts_resume(struct device *dev) static SIMPLE_DEV_PM_OPS(edt_ft5x06_ts_pm_ops, edt_ft5x06_ts_suspend, edt_ft5x06_ts_resume); +static const struct edt_i2c_chip_data edt_ft5x06_data = { + .max_support_points = 5, +}; + +static const struct edt_i2c_chip_data edt_ft5506_data = { + .max_support_points = 10, +}; + static const struct i2c_device_id edt_ft5x06_ts_id[] = { - { "edt-ft5x06", 0, }, + { .name = "edt-ft5x06", .driver_data = (long)&edt_ft5x06_data }, + { .name = "edt-ft5506", .driver_data = (long)&edt_ft5506_data }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(i2c, edt_ft5x06_ts_id); #ifdef CONFIG_OF static const struct of_device_id edt_ft5x06_of_match[] = { - { .compatible = "edt,edt-ft5206", }, - { .compatible = "edt,edt-ft5306", }, - { .compatible = "edt,edt-ft5406", }, + { .compatible = "edt,edt-ft5206", .data = &edt_ft5x06_data }, + { .compatible = "edt,edt-ft5306", .data = &edt_ft5x06_data }, + { .compatible = "edt,edt-ft5406", .data = &edt_ft5x06_data }, + { .compatible = "edt,edt-ft5506", .data = &edt_ft5506_data }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, edt_ft5x06_of_match); |