diff options
Diffstat (limited to 'drivers/input/touchscreen')
| -rw-r--r-- | drivers/input/touchscreen/Kconfig | 13 | ||||
| -rw-r--r-- | drivers/input/touchscreen/Makefile | 1 | ||||
| -rw-r--r-- | drivers/input/touchscreen/ad7877.c | 2 | ||||
| -rw-r--r-- | drivers/input/touchscreen/ad7879-spi.c | 1 | ||||
| -rw-r--r-- | drivers/input/touchscreen/cyttsp4_core.c | 2 | ||||
| -rw-r--r-- | drivers/input/touchscreen/cyttsp4_spi.c | 5 | ||||
| -rw-r--r-- | drivers/input/touchscreen/cyttsp_core.c | 2 | ||||
| -rw-r--r-- | drivers/input/touchscreen/egalax_ts.c | 2 | ||||
| -rw-r--r-- | drivers/input/touchscreen/htcpen.c | 2 | ||||
| -rw-r--r-- | drivers/input/touchscreen/st1232.c | 1 | ||||
| -rw-r--r-- | drivers/input/touchscreen/ti_am335x_tsc.c | 23 | ||||
| -rw-r--r-- | drivers/input/touchscreen/tsc2005.c | 2 | ||||
| -rw-r--r-- | drivers/input/touchscreen/usbtouchscreen.c | 4 | ||||
| -rw-r--r-- | drivers/input/touchscreen/zforce_ts.c | 836 |
14 files changed, 873 insertions, 23 deletions
diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig index e09ec67957a3..00d1e547b211 100644 --- a/drivers/input/touchscreen/Kconfig +++ b/drivers/input/touchscreen/Kconfig @@ -919,4 +919,17 @@ config TOUCHSCREEN_TPS6507X To compile this driver as a module, choose M here: the module will be called tps6507x_ts. +config TOUCHSCREEN_ZFORCE + tristate "Neonode zForce infrared touchscreens" + depends on I2C + depends on GPIOLIB + help + Say Y here if you have a touchscreen using the zforce + infraread technology from Neonode. + + If unsure, say N. + + To compile this driver as a module, choose M here: the + module will be called zforce_ts. + endif diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile index f5216c1bf53e..7587883b8d38 100644 --- a/drivers/input/touchscreen/Makefile +++ b/drivers/input/touchscreen/Makefile @@ -75,3 +75,4 @@ obj-$(CONFIG_TOUCHSCREEN_WM97XX_MAINSTONE) += mainstone-wm97xx.o obj-$(CONFIG_TOUCHSCREEN_WM97XX_ZYLONITE) += zylonite-wm97xx.o obj-$(CONFIG_TOUCHSCREEN_W90X900) += w90p910_ts.o obj-$(CONFIG_TOUCHSCREEN_TPS6507X) += tps6507x-ts.o +obj-$(CONFIG_TOUCHSCREEN_ZFORCE) += zforce_ts.o diff --git a/drivers/input/touchscreen/ad7877.c b/drivers/input/touchscreen/ad7877.c index f3a174a83c82..69834dd3c313 100644 --- a/drivers/input/touchscreen/ad7877.c +++ b/drivers/input/touchscreen/ad7877.c @@ -806,7 +806,6 @@ err_free_irq: err_free_mem: input_free_device(input_dev); kfree(ts); - spi_set_drvdata(spi, NULL); return err; } @@ -823,7 +822,6 @@ static int ad7877_remove(struct spi_device *spi) kfree(ts); dev_dbg(&spi->dev, "unregistered touchscreen\n"); - spi_set_drvdata(spi, NULL); return 0; } diff --git a/drivers/input/touchscreen/ad7879-spi.c b/drivers/input/touchscreen/ad7879-spi.c index 606da5bd6115..1a7b1143536e 100644 --- a/drivers/input/touchscreen/ad7879-spi.c +++ b/drivers/input/touchscreen/ad7879-spi.c @@ -142,7 +142,6 @@ static int ad7879_spi_remove(struct spi_device *spi) struct ad7879 *ts = spi_get_drvdata(spi); ad7879_remove(ts); - spi_set_drvdata(spi, NULL); return 0; } diff --git a/drivers/input/touchscreen/cyttsp4_core.c b/drivers/input/touchscreen/cyttsp4_core.c index d038575f49db..42d830efa316 100644 --- a/drivers/input/touchscreen/cyttsp4_core.c +++ b/drivers/input/touchscreen/cyttsp4_core.c @@ -2113,7 +2113,6 @@ error_startup: error_request_irq: if (cd->cpdata->init) cd->cpdata->init(cd->cpdata, 0, dev); - dev_set_drvdata(dev, NULL); error_free_xfer: kfree(cd->xfer_buf); error_free_cd: @@ -2151,7 +2150,6 @@ int cyttsp4_remove(struct cyttsp4 *cd) free_irq(cd->irq, cd); if (cd->cpdata->init) cd->cpdata->init(cd->cpdata, 0, dev); - dev_set_drvdata(dev, NULL); cyttsp4_free_si_ptrs(cd); kfree(cd); return 0; diff --git a/drivers/input/touchscreen/cyttsp4_spi.c b/drivers/input/touchscreen/cyttsp4_spi.c index a71e1141d638..b19434cebbf6 100644 --- a/drivers/input/touchscreen/cyttsp4_spi.c +++ b/drivers/input/touchscreen/cyttsp4_spi.c @@ -171,10 +171,7 @@ static int cyttsp4_spi_probe(struct spi_device *spi) ts = cyttsp4_probe(&cyttsp_spi_bus_ops, &spi->dev, spi->irq, CY_SPI_DATA_BUF_SIZE); - if (IS_ERR(ts)) - return PTR_ERR(ts); - - return 0; + return PTR_ERR_OR_ZERO(ts); } static int cyttsp4_spi_remove(struct spi_device *spi) diff --git a/drivers/input/touchscreen/cyttsp_core.c b/drivers/input/touchscreen/cyttsp_core.c index d53e0b72a407..4204841cdc49 100644 --- a/drivers/input/touchscreen/cyttsp_core.c +++ b/drivers/input/touchscreen/cyttsp_core.c @@ -242,7 +242,7 @@ static int cyttsp_soft_reset(struct cyttsp *ts) int retval; /* wait for interrupt to set ready completion */ - INIT_COMPLETION(ts->bl_ready); + reinit_completion(&ts->bl_ready); ts->state = CY_BL_STATE; enable_irq(ts->irq); diff --git a/drivers/input/touchscreen/egalax_ts.c b/drivers/input/touchscreen/egalax_ts.c index ef5fcb0945e9..054d22583248 100644 --- a/drivers/input/touchscreen/egalax_ts.c +++ b/drivers/input/touchscreen/egalax_ts.c @@ -273,7 +273,7 @@ static struct i2c_driver egalax_ts_driver = { .name = "egalax_ts", .owner = THIS_MODULE, .pm = &egalax_ts_pm_ops, - .of_match_table = of_match_ptr(egalax_ts_dt_ids), + .of_match_table = egalax_ts_dt_ids, }, .id_table = egalax_ts_id, .probe = egalax_ts_probe, diff --git a/drivers/input/touchscreen/htcpen.c b/drivers/input/touchscreen/htcpen.c index 66500852341b..92e2243fb77d 100644 --- a/drivers/input/touchscreen/htcpen.c +++ b/drivers/input/touchscreen/htcpen.c @@ -186,8 +186,6 @@ static int htcpen_isa_remove(struct device *dev, unsigned int id) release_region(HTCPEN_PORT_INIT, 1); release_region(HTCPEN_PORT_IRQ_CLEAR, 1); - dev_set_drvdata(dev, NULL); - return 0; } diff --git a/drivers/input/touchscreen/st1232.c b/drivers/input/touchscreen/st1232.c index 1740a2496371..2f03b2f289dd 100644 --- a/drivers/input/touchscreen/st1232.c +++ b/drivers/input/touchscreen/st1232.c @@ -24,6 +24,7 @@ #include <linux/input.h> #include <linux/interrupt.h> #include <linux/module.h> +#include <linux/of.h> #include <linux/of_gpio.h> #include <linux/pm_qos.h> #include <linux/slab.h> diff --git a/drivers/input/touchscreen/ti_am335x_tsc.c b/drivers/input/touchscreen/ti_am335x_tsc.c index e1c5300cacfc..68beadaabceb 100644 --- a/drivers/input/touchscreen/ti_am335x_tsc.c +++ b/drivers/input/touchscreen/ti_am335x_tsc.c @@ -52,6 +52,7 @@ struct titsc { u32 config_inp[4]; u32 bit_xp, bit_xn, bit_yp, bit_yn; u32 inp_xp, inp_xn, inp_yp, inp_yn; + u32 step_mask; }; static unsigned int titsc_readl(struct titsc *ts, unsigned int reg) @@ -196,7 +197,8 @@ static void titsc_step_config(struct titsc *ts_dev) /* The steps1 … end and bit 0 for TS_Charge */ stepenable = (1 << (end_step + 2)) - 1; - am335x_tsc_se_set(ts_dev->mfd_tscadc, stepenable); + ts_dev->step_mask = stepenable; + am335x_tsc_se_set(ts_dev->mfd_tscadc, ts_dev->step_mask); } static void titsc_read_coordinates(struct titsc *ts_dev, @@ -260,6 +262,10 @@ static irqreturn_t titsc_irq(int irq, void *dev) unsigned int fsm; status = titsc_readl(ts_dev, REG_IRQSTATUS); + /* + * ADC and touchscreen share the IRQ line. + * FIFO1 interrupts are used by ADC. Handle FIFO0 IRQs here only + */ if (status & IRQENB_FIFO0THRES) { titsc_read_coordinates(ts_dev, &x, &y, &z1, &z2); @@ -316,7 +322,7 @@ static irqreturn_t titsc_irq(int irq, void *dev) if (irqclr) { titsc_writel(ts_dev, REG_IRQSTATUS, irqclr); - am335x_tsc_se_update(ts_dev->mfd_tscadc); + am335x_tsc_se_set(ts_dev->mfd_tscadc, ts_dev->step_mask); return IRQ_HANDLED; } return IRQ_NONE; @@ -348,9 +354,16 @@ static int titsc_parse_dt(struct platform_device *pdev, if (err < 0) return err; - err = of_property_read_u32(node, "ti,coordiante-readouts", + /* + * Try with the new binding first. If it fails, try again with + * bogus, miss-spelled version. + */ + err = of_property_read_u32(node, "ti,coordinate-readouts", &ts_dev->coordinate_readouts); if (err < 0) + err = of_property_read_u32(node, "ti,coordiante-readouts", + &ts_dev->coordinate_readouts); + if (err < 0) return err; return of_property_read_u32_array(node, "ti,wire-config", @@ -389,7 +402,7 @@ static int titsc_probe(struct platform_device *pdev) } err = request_irq(ts_dev->irq, titsc_irq, - 0, pdev->dev.driver->name, ts_dev); + IRQF_SHARED, pdev->dev.driver->name, ts_dev); if (err) { dev_err(&pdev->dev, "failed to allocate irq.\n"); goto err_free_mem; @@ -505,7 +518,7 @@ static struct platform_driver ti_tsc_driver = { .name = "TI-am335x-tsc", .owner = THIS_MODULE, .pm = TITSC_PM_OPS, - .of_match_table = of_match_ptr(ti_tsc_dt_ids), + .of_match_table = ti_tsc_dt_ids, }, }; module_platform_driver(ti_tsc_driver); diff --git a/drivers/input/touchscreen/tsc2005.c b/drivers/input/touchscreen/tsc2005.c index 7213e8b07e79..811353353917 100644 --- a/drivers/input/touchscreen/tsc2005.c +++ b/drivers/input/touchscreen/tsc2005.c @@ -678,7 +678,6 @@ static int tsc2005_probe(struct spi_device *spi) err_remove_sysfs: sysfs_remove_group(&spi->dev.kobj, &tsc2005_attr_group); err_clear_drvdata: - spi_set_drvdata(spi, NULL); free_irq(spi->irq, ts); err_free_mem: input_free_device(input_dev); @@ -696,7 +695,6 @@ static int tsc2005_remove(struct spi_device *spi) input_unregister_device(ts->idev); kfree(ts); - spi_set_drvdata(spi, NULL); return 0; } diff --git a/drivers/input/touchscreen/usbtouchscreen.c b/drivers/input/touchscreen/usbtouchscreen.c index 721fdb3597ca..ae4b6b903629 100644 --- a/drivers/input/touchscreen/usbtouchscreen.c +++ b/drivers/input/touchscreen/usbtouchscreen.c @@ -146,12 +146,10 @@ enum { #define USB_DEVICE_HID_CLASS(vend, prod) \ .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS \ - | USB_DEVICE_ID_MATCH_INT_PROTOCOL \ | USB_DEVICE_ID_MATCH_DEVICE, \ .idVendor = (vend), \ .idProduct = (prod), \ - .bInterfaceClass = USB_INTERFACE_CLASS_HID, \ - .bInterfaceProtocol = USB_INTERFACE_PROTOCOL_MOUSE + .bInterfaceClass = USB_INTERFACE_CLASS_HID static const struct usb_device_id usbtouch_devices[] = { #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX diff --git a/drivers/input/touchscreen/zforce_ts.c b/drivers/input/touchscreen/zforce_ts.c new file mode 100644 index 000000000000..75762d6ff3ba --- /dev/null +++ b/drivers/input/touchscreen/zforce_ts.c @@ -0,0 +1,836 @@ +/* + * Copyright (C) 2012-2013 MundoReader S.L. + * Author: Heiko Stuebner <heiko@sntech.de> + * + * based in parts on Nook zforce driver + * + * Copyright (C) 2010 Barnes & Noble, Inc. + * Author: Pieter Truter<ptruter@intrinsyc.com> + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * 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. + */ + +#include <linux/module.h> +#include <linux/hrtimer.h> +#include <linux/slab.h> +#include <linux/input.h> +#include <linux/interrupt.h> +#include <linux/i2c.h> +#include <linux/delay.h> +#include <linux/gpio.h> +#include <linux/device.h> +#include <linux/sysfs.h> +#include <linux/input/mt.h> +#include <linux/platform_data/zforce_ts.h> + +#define WAIT_TIMEOUT msecs_to_jiffies(1000) + +#define FRAME_START 0xee + +/* Offsets of the different parts of the payload the controller sends */ +#define PAYLOAD_HEADER 0 +#define PAYLOAD_LENGTH 1 +#define PAYLOAD_BODY 2 + +/* Response offsets */ +#define RESPONSE_ID 0 +#define RESPONSE_DATA 1 + +/* Commands */ +#define COMMAND_DEACTIVATE 0x00 +#define COMMAND_INITIALIZE 0x01 +#define COMMAND_RESOLUTION 0x02 +#define COMMAND_SETCONFIG 0x03 +#define COMMAND_DATAREQUEST 0x04 +#define COMMAND_SCANFREQ 0x08 +#define COMMAND_STATUS 0X1e + +/* + * Responses the controller sends as a result of + * command requests + */ +#define RESPONSE_DEACTIVATE 0x00 +#define RESPONSE_INITIALIZE 0x01 +#define RESPONSE_RESOLUTION 0x02 +#define RESPONSE_SETCONFIG 0x03 +#define RESPONSE_SCANFREQ 0x08 +#define RESPONSE_STATUS 0X1e + +/* + * Notifications are send by the touch controller without + * being requested by the driver and include for example + * touch indications + */ +#define NOTIFICATION_TOUCH 0x04 +#define NOTIFICATION_BOOTCOMPLETE 0x07 +#define NOTIFICATION_OVERRUN 0x25 +#define NOTIFICATION_PROXIMITY 0x26 +#define NOTIFICATION_INVALID_COMMAND 0xfe + +#define ZFORCE_REPORT_POINTS 2 +#define ZFORCE_MAX_AREA 0xff + +#define STATE_DOWN 0 +#define STATE_MOVE 1 +#define STATE_UP 2 + +#define SETCONFIG_DUALTOUCH (1 << 0) + +struct zforce_point { + int coord_x; + int coord_y; + int state; + int id; + int area_major; + int area_minor; + int orientation; + int pressure; + int prblty; +}; + +/* + * @client the i2c_client + * @input the input device + * @suspending in the process of going to suspend (don't emit wakeup + * events for commands executed to suspend the device) + * @suspended device suspended + * @access_mutex serialize i2c-access, to keep multipart reads together + * @command_done completion to wait for the command result + * @command_mutex serialize commands send to the ic + * @command_waiting the id of the command that that is currently waiting + * for a result + * @command_result returned result of the command + */ +struct zforce_ts { + struct i2c_client *client; + struct input_dev *input; + const struct zforce_ts_platdata *pdata; + char phys[32]; + + bool suspending; + bool suspended; + bool boot_complete; + + /* Firmware version information */ + u16 version_major; + u16 version_minor; + u16 version_build; + u16 version_rev; + + struct mutex access_mutex; + + struct completion command_done; + struct mutex command_mutex; + int command_waiting; + int command_result; +}; + +static int zforce_command(struct zforce_ts *ts, u8 cmd) +{ + struct i2c_client *client = ts->client; + char buf[3]; + int ret; + + dev_dbg(&client->dev, "%s: 0x%x\n", __func__, cmd); + + buf[0] = FRAME_START; + buf[1] = 1; /* data size, command only */ + buf[2] = cmd; + + mutex_lock(&ts->access_mutex); + ret = i2c_master_send(client, &buf[0], ARRAY_SIZE(buf)); + mutex_unlock(&ts->access_mutex); + if (ret < 0) { + dev_err(&client->dev, "i2c send data request error: %d\n", ret); + return ret; + } + + return 0; +} + +static int zforce_send_wait(struct zforce_ts *ts, const char *buf, int len) +{ + struct i2c_client *client = ts->client; + int ret; + + ret = mutex_trylock(&ts->command_mutex); + if (!ret) { + dev_err(&client->dev, "already waiting for a command\n"); + return -EBUSY; + } + + dev_dbg(&client->dev, "sending %d bytes for command 0x%x\n", + buf[1], buf[2]); + + ts->command_waiting = buf[2]; + + mutex_lock(&ts->access_mutex); + ret = i2c_master_send(client, buf, len); + mutex_unlock(&ts->access_mutex); + if (ret < 0) { + dev_err(&client->dev, "i2c send data request error: %d\n", ret); + goto unlock; + } + + dev_dbg(&client->dev, "waiting for result for command 0x%x\n", buf[2]); + + if (wait_for_completion_timeout(&ts->command_done, WAIT_TIMEOUT) == 0) { + ret = -ETIME; + goto unlock; + } + + ret = ts->command_result; + +unlock: + mutex_unlock(&ts->command_mutex); + return ret; +} + +static int zforce_command_wait(struct zforce_ts *ts, u8 cmd) +{ + struct i2c_client *client = ts->client; + char buf[3]; + int ret; + + dev_dbg(&client->dev, "%s: 0x%x\n", __func__, cmd); + + buf[0] = FRAME_START; + buf[1] = 1; /* data size, command only */ + buf[2] = cmd; + + ret = zforce_send_wait(ts, &buf[0], ARRAY_SIZE(buf)); + if (ret < 0) { + dev_err(&client->dev, "i2c send data request error: %d\n", ret); + return ret; + } + + return 0; +} + +static int zforce_resolution(struct zforce_ts *ts, u16 x, u16 y) +{ + struct i2c_client *client = ts->client; + char buf[7] = { FRAME_START, 5, COMMAND_RESOLUTION, + (x & 0xff), ((x >> 8) & 0xff), + (y & 0xff), ((y >> 8) & 0xff) }; + + dev_dbg(&client->dev, "set resolution to (%d,%d)\n", x, y); + + return zforce_send_wait(ts, &buf[0], ARRAY_SIZE(buf)); +} + +static int zforce_scan_frequency(struct zforce_ts *ts, u16 idle, u16 finger, + u16 stylus) +{ + struct i2c_client *client = ts->client; + char buf[9] = { FRAME_START, 7, COMMAND_SCANFREQ, + (idle & 0xff), ((idle >> 8) & 0xff), + (finger & 0xff), ((finger >> 8) & 0xff), + (stylus & 0xff), ((stylus >> 8) & 0xff) }; + + dev_dbg(&client->dev, "set scan frequency to (idle: %d, finger: %d, stylus: %d)\n", + idle, finger, stylus); + + return zforce_send_wait(ts, &buf[0], ARRAY_SIZE(buf)); +} + +static int zforce_setconfig(struct zforce_ts *ts, char b1) +{ + struct i2c_client *client = ts->client; + char buf[7] = { FRAME_START, 5, COMMAND_SETCONFIG, + b1, 0, 0, 0 }; + + dev_dbg(&client->dev, "set config to (%d)\n", b1); + + return zforce_send_wait(ts, &buf[0], ARRAY_SIZE(buf)); +} + +static int zforce_start(struct zforce_ts *ts) +{ + struct i2c_client *client = ts->client; + const struct zforce_ts_platdata *pdata = dev_get_platdata(&client->dev); + int ret; + + dev_dbg(&client->dev, "starting device\n"); + + ret = zforce_command_wait(ts, COMMAND_INITIALIZE); + if (ret) { + dev_err(&client->dev, "Unable to initialize, %d\n", ret); + return ret; + } + + ret = zforce_resolution(ts, pdata->x_max, pdata->y_max); + if (ret) { + dev_err(&client->dev, "Unable to set resolution, %d\n", ret); + goto error; + } + + ret = zforce_scan_frequency(ts, 10, 50, 50); + if (ret) { + dev_err(&client->dev, "Unable to set scan frequency, %d\n", + ret); + goto error; + } + + if (zforce_setconfig(ts, SETCONFIG_DUALTOUCH)) { + dev_err(&client->dev, "Unable to set config\n"); + goto error; + } + + /* start sending touch events */ + ret = zforce_command(ts, COMMAND_DATAREQUEST); + if (ret) { + dev_err(&client->dev, "Unable to request data\n"); + goto error; + } + + /* + * Per NN, initial cal. take max. of 200msec. + * Allow time to complete this calibration + */ + msleep(200); + + return 0; + +error: + zforce_command_wait(ts, COMMAND_DEACTIVATE); + return ret; +} + +static int zforce_stop(struct zforce_ts *ts) +{ + struct i2c_client *client = ts->client; + int ret; + + dev_dbg(&client->dev, "stopping device\n"); + + /* Deactivates touch sensing and puts the device into sleep. */ + ret = zforce_command_wait(ts, COMMAND_DEACTIVATE); + if (ret != 0) { + dev_err(&client->dev, "could not deactivate device, %d\n", + ret); + return ret; + } + + return 0; +} + +static int zforce_touch_event(struct zforce_ts *ts, u8 *payload) +{ + struct i2c_client *client = ts->client; + const struct zforce_ts_platdata *pdata = dev_get_platdata(&client->dev); + struct zforce_point point; + int count, i, num = 0; + + count = payload[0]; + if (count > ZFORCE_REPORT_POINTS) { + dev_warn(&client->dev, "to many coordinates %d, expected max %d\n", + count, ZFORCE_REPORT_POINTS); + count = ZFORCE_REPORT_POINTS; + } + + for (i = 0; i < count; i++) { + point.coord_x = + payload[9 * i + 2] << 8 | payload[9 * i + 1]; + point.coord_y = + payload[9 * i + 4] << 8 | payload[9 * i + 3]; + + if (point.coord_x > pdata->x_max || + point.coord_y > pdata->y_max) { + dev_warn(&client->dev, "coordinates (%d,%d) invalid\n", + point.coord_x, point.coord_y); + point.coord_x = point.coord_y = 0; + } + + point.state = payload[9 * i + 5] & 0x03; + point.id = (payload[9 * i + 5] & 0xfc) >> 2; + + /* determine touch major, minor and orientation */ + point.area_major = max(payload[9 * i + 6], + payload[9 * i + 7]); + point.area_minor = min(payload[9 * i + 6], + payload[9 * i + 7]); + point.orientation = payload[9 * i + 6] > payload[9 * i + 7]; + + point.pressure = payload[9 * i + 8]; + point.prblty = payload[9 * i + 9]; + + dev_dbg(&client->dev, + "point %d/%d: state %d, id %d, pressure %d, prblty %d, x %d, y %d, amajor %d, aminor %d, ori %d\n", + i, count, point.state, point.id, + point.pressure, point.prblty, + point.coord_x, point.coord_y, + point.area_major, point.area_minor, + point.orientation); + + /* the zforce id starts with "1", so needs to be decreased */ + input_mt_slot(ts->input, point.id - 1); + + input_mt_report_slot_state(ts->input, MT_TOOL_FINGER, + point.state != STATE_UP); + + if (point.state != STATE_UP) { + input_report_abs(ts->input, ABS_MT_POSITION_X, + point.coord_x); + input_report_abs(ts->input, ABS_MT_POSITION_Y, + point.coord_y); + input_report_abs(ts->input, ABS_MT_TOUCH_MAJOR, + point.area_major); + input_report_abs(ts->input, ABS_MT_TOUCH_MINOR, + point.area_minor); + input_report_abs(ts->input, ABS_MT_ORIENTATION, + point.orientation); + num++; + } + } + + input_mt_sync_frame(ts->input); + + input_mt_report_finger_count(ts->input, num); + + input_sync(ts->input); + + return 0; +} + +static int zforce_read_packet(struct zforce_ts *ts, u8 *buf) +{ + struct i2c_client *client = ts->client; + int ret; + + mutex_lock(&ts->access_mutex); + + /* read 2 byte message header */ + ret = i2c_master_recv(client, buf, 2); + if (ret < 0) { + dev_err(&client->dev, "error reading header: %d\n", ret); + goto unlock; + } + + if (buf[PAYLOAD_HEADER] != FRAME_START) { + dev_err(&client->dev, "invalid frame start: %d\n", buf[0]); + ret = -EIO; + goto unlock; + } + + if (buf[PAYLOAD_LENGTH] <= 0 || buf[PAYLOAD_LENGTH] > 255) { + dev_err(&client->dev, "invalid payload length: %d\n", + buf[PAYLOAD_LENGTH]); + ret = -EIO; + goto unlock; + } + + /* read the message */ + ret = i2c_master_recv(client, &buf[PAYLOAD_BODY], buf[PAYLOAD_LENGTH]); + if (ret < 0) { + dev_err(&client->dev, "error reading payload: %d\n", ret); + goto unlock; + } + + dev_dbg(&client->dev, "read %d bytes for response command 0x%x\n", + buf[PAYLOAD_LENGTH], buf[PAYLOAD_BODY]); + +unlock: + mutex_unlock(&ts->access_mutex); + return ret; +} + +static void zforce_complete(struct zforce_ts *ts, int cmd, int result) +{ + struct i2c_client *client = ts->client; + + if (ts->command_waiting == cmd) { + dev_dbg(&client->dev, "completing command 0x%x\n", cmd); + ts->command_result = result; + complete(&ts->command_done); + } else { + dev_dbg(&client->dev, "command %d not for us\n", cmd); + } +} + +static irqreturn_t zforce_interrupt(int irq, void *dev_id) +{ + struct zforce_ts *ts = dev_id; + struct i2c_client *client = ts->client; + const struct zforce_ts_platdata *pdata = dev_get_platdata(&client->dev); + int ret; + u8 payload_buffer[512]; + u8 *payload; + + /* + * When suspended, emit a wakeup signal if necessary and return. + * Due to the level-interrupt we will get re-triggered later. + */ + if (ts->suspended) { + if (device_may_wakeup(&client->dev)) + pm_wakeup_event(&client->dev, 500); + msleep(20); + return IRQ_HANDLED; + } + + dev_dbg(&client->dev, "handling interrupt\n"); + + /* Don't emit wakeup events from commands run by zforce_suspend */ + if (!ts->suspending && device_may_wakeup(&client->dev)) + pm_stay_awake(&client->dev); + + while (!gpio_get_value(pdata->gpio_int)) { + ret = zforce_read_packet(ts, payload_buffer); + if (ret < 0) { + dev_err(&client->dev, "could not read packet, ret: %d\n", + ret); + break; + } + + payload = &payload_buffer[PAYLOAD_BODY]; + + switch (payload[RESPONSE_ID]) { + case NOTIFICATION_TOUCH: + /* + * Always report touch-events received while + * suspending, when being a wakeup source + */ + if (ts->suspending && device_may_wakeup(&client->dev)) + pm_wakeup_event(&client->dev, 500); + zforce_touch_event(ts, &payload[RESPONSE_DATA]); + break; + + case NOTIFICATION_BOOTCOMPLETE: + ts->boot_complete = payload[RESPONSE_DATA]; + zforce_complete(ts, payload[RESPONSE_ID], 0); + break; + + case RESPONSE_INITIALIZE: + case RESPONSE_DEACTIVATE: + case RESPONSE_SETCONFIG: + case RESPONSE_RESOLUTION: + case RESPONSE_SCANFREQ: + zforce_complete(ts, payload[RESPONSE_ID], + payload[RESPONSE_DATA]); + break; + + case RESPONSE_STATUS: + /* + * Version Payload Results + * [2:major] [2:minor] [2:build] [2:rev] + */ + ts->version_major = (payload[RESPONSE_DATA + 1] << 8) | + payload[RESPONSE_DATA]; + ts->version_minor = (payload[RESPONSE_DATA + 3] << 8) | + payload[RESPONSE_DATA + 2]; + ts->version_build = (payload[RESPONSE_DATA + 5] << 8) | + payload[RESPONSE_DATA + 4]; + ts->version_rev = (payload[RESPONSE_DATA + 7] << 8) | + payload[RESPONSE_DATA + 6]; + dev_dbg(&ts->client->dev, "Firmware Version %04x:%04x %04x:%04x\n", + ts->version_major, ts->version_minor, + ts->version_build, ts->version_rev); + + zforce_complete(ts, payload[RESPONSE_ID], 0); + break; + + case NOTIFICATION_INVALID_COMMAND: + dev_err(&ts->client->dev, "invalid command: 0x%x\n", + payload[RESPONSE_DATA]); + break; + + default: + dev_err(&ts->client->dev, "unrecognized response id: 0x%x\n", + payload[RESPONSE_ID]); + break; + } + } + + if (!ts->suspending && device_may_wakeup(&client->dev)) + pm_relax(&client->dev); + + dev_dbg(&client->dev, "finished interrupt\n"); + + return IRQ_HANDLED; +} + +static int zforce_input_open(struct input_dev *dev) +{ + struct zforce_ts *ts = input_get_drvdata(dev); + int ret; + + ret = zforce_start(ts); + if (ret) + return ret; + + return 0; +} + +static void zforce_input_close(struct input_dev *dev) +{ + struct zforce_ts *ts = input_get_drvdata(dev); + struct i2c_client *client = ts->client; + int ret; + + ret = zforce_stop(ts); + if (ret) + dev_warn(&client->dev, "stopping zforce failed\n"); + + return; +} + +#ifdef CONFIG_PM_SLEEP +static int zforce_suspend(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct zforce_ts *ts = i2c_get_clientdata(client); + struct input_dev *input = ts->input; + int ret = 0; + + mutex_lock(&input->mutex); + ts->suspending = true; + + /* + * When configured as a wakeup source device should always wake + * the system, therefore start device if necessary. + */ + if (device_may_wakeup(&client->dev)) { + dev_dbg(&client->dev, "suspend while being a wakeup source\n"); + + /* Need to start device, if not open, to be a wakeup source. */ + if (!input->users) { + ret = zforce_start(ts); + if (ret) + goto unlock; + } + + enable_irq_wake(client->irq); + } else if (input->users) { + dev_dbg(&client->dev, "suspend without being a wakeup source\n"); + + ret = zforce_stop(ts); + if (ret) + goto unlock; + + disable_irq(client->irq); + } + + ts->suspended = true; + +unlock: + ts->suspending = false; + mutex_unlock(&input->mutex); + + return ret; +} + +static int zforce_resume(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct zforce_ts *ts = i2c_get_clientdata(client); + struct input_dev *input = ts->input; + int ret = 0; + + mutex_lock(&input->mutex); + + ts->suspended = false; + + if (device_may_wakeup(&client->dev)) { + dev_dbg(&client->dev, "resume from being a wakeup source\n"); + + disable_irq_wake(client->irq); + + /* need to stop device if it was not open on suspend */ + if (!input->users) { + ret = zforce_stop(ts); + if (ret) + goto unlock; + } + } else if (input->users) { + dev_dbg(&client->dev, "resume without being a wakeup source\n"); + + enable_irq(client->irq); + + ret = zforce_start(ts); + if (ret < 0) + goto unlock; + } + +unlock: + mutex_unlock(&input->mutex); + + return ret; +} +#endif + +static SIMPLE_DEV_PM_OPS(zforce_pm_ops, zforce_suspend, zforce_resume); + +static void zforce_reset(void *data) +{ + struct zforce_ts *ts = data; + + gpio_set_value(ts->pdata->gpio_rst, 0); +} + +static int zforce_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + const struct zforce_ts_platdata *pdata = dev_get_platdata(&client->dev); + struct zforce_ts *ts; + struct input_dev *input_dev; + int ret; + + if (!pdata) + return -EINVAL; + + ts = devm_kzalloc(&client->dev, sizeof(struct zforce_ts), GFP_KERNEL); + if (!ts) + return -ENOMEM; + + ret = devm_gpio_request_one(&client->dev, pdata->gpio_int, GPIOF_IN, + "zforce_ts_int"); + if (ret) { + dev_err(&client->dev, "request of gpio %d failed, %d\n", + pdata->gpio_int, ret); + return ret; + } + + ret = devm_gpio_request_one(&client->dev, pdata->gpio_rst, + GPIOF_OUT_INIT_LOW, "zforce_ts_rst"); + if (ret) { + dev_err(&client->dev, "request of gpio %d failed, %d\n", + pdata->gpio_rst, ret); + return ret; + } + + ret = devm_add_action(&client->dev, zforce_reset, ts); + if (ret) { + dev_err(&client->dev, "failed to register reset action, %d\n", + ret); + return ret; + } + + snprintf(ts->phys, sizeof(ts->phys), + "%s/input0", dev_name(&client->dev)); + + input_dev = devm_input_allocate_device(&client->dev); + if (!input_dev) { + dev_err(&client->dev, "could not allocate input device\n"); + return -ENOMEM; + } + + mutex_init(&ts->access_mutex); + mutex_init(&ts->command_mutex); + + ts->pdata = pdata; + ts->client = client; + ts->input = input_dev; + + input_dev->name = "Neonode zForce touchscreen"; + input_dev->phys = ts->phys; + input_dev->id.bustype = BUS_I2C; + + input_dev->open = zforce_input_open; + input_dev->close = zforce_input_close; + + __set_bit(EV_KEY, input_dev->evbit); + __set_bit(EV_SYN, input_dev->evbit); + __set_bit(EV_ABS, input_dev->evbit); + + /* For multi touch */ + input_set_abs_params(input_dev, ABS_MT_POSITION_X, 0, + pdata->x_max, 0, 0); + input_set_abs_params(input_dev, ABS_MT_POSITION_Y, 0, + pdata->y_max, 0, 0); + + input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR, 0, + ZFORCE_MAX_AREA, 0, 0); + input_set_abs_params(input_dev, ABS_MT_TOUCH_MINOR, 0, + ZFORCE_MAX_AREA, 0, 0); + input_set_abs_params(input_dev, ABS_MT_ORIENTATION, 0, 1, 0, 0); + input_mt_init_slots(input_dev, ZFORCE_REPORT_POINTS, INPUT_MT_DIRECT); + + input_set_drvdata(ts->input, ts); + + init_completion(&ts->command_done); + + /* + * The zforce pulls the interrupt low when it has data ready. + * After it is triggered the isr thread runs until all the available + * packets have been read and the interrupt is high again. + * Therefore we can trigger the interrupt anytime it is low and do + * not need to limit it to the interrupt edge. + */ + ret = devm_request_threaded_irq(&client->dev, client->irq, NULL, + zforce_interrupt, + IRQF_TRIGGER_LOW | IRQF_ONESHOT, + input_dev->name, ts); + if (ret) { + dev_err(&client->dev, "irq %d request failed\n", client->irq); + return ret; + } + + i2c_set_clientdata(client, ts); + + /* let the controller boot */ + gpio_set_value(pdata->gpio_rst, 1); + + ts->command_waiting = NOTIFICATION_BOOTCOMPLETE; + if (wait_for_completion_timeout(&ts->command_done, WAIT_TIMEOUT) == 0) + dev_warn(&client->dev, "bootcomplete timed out\n"); + + /* need to start device to get version information */ + ret = zforce_command_wait(ts, COMMAND_INITIALIZE); + if (ret) { + dev_err(&client->dev, "unable to initialize, %d\n", ret); + return ret; + } + + /* this gets the firmware version among other informations */ + ret = zforce_command_wait(ts, COMMAND_STATUS); + if (ret < 0) { + dev_err(&client->dev, "couldn't get status, %d\n", ret); + zforce_stop(ts); + return ret; + } + + /* stop device and put it into sleep until it is opened */ + ret = zforce_stop(ts); + if (ret < 0) + return ret; + + device_set_wakeup_capable(&client->dev, true); + + ret = input_register_device(input_dev); + if (ret) { + dev_err(&client->dev, "could not register input device, %d\n", + ret); + return ret; + } + + return 0; +} + +static struct i2c_device_id zforce_idtable[] = { + { "zforce-ts", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, zforce_idtable); + +static struct i2c_driver zforce_driver = { + .driver = { + .owner = THIS_MODULE, + .name = "zforce-ts", + .pm = &zforce_pm_ops, + }, + .probe = zforce_probe, + .id_table = zforce_idtable, +}; + +module_i2c_driver(zforce_driver); + +MODULE_AUTHOR("Heiko Stuebner <heiko@sntech.de>"); +MODULE_DESCRIPTION("zForce TouchScreen Driver"); +MODULE_LICENSE("GPL"); |