This is my first input driver, and my first attempt to istart the process of upstreaming something, (other than a small patch). I apologize in advance :)
The Uniwest EVI front panel has 9 usable buttons which correspond to keyboard keys, as well as horizontal and verical slidersr, (the sliders are like touch based scroll bars) and 9 indicator LEDs This initial version of the driver just supports the buttons. Signed-off-by: Joshua Clayton <[email protected]> --- drivers/input/misc/Kconfig | 10 ++ drivers/input/misc/Makefile | 1 + drivers/input/misc/evifpanel.c | 265 +++++++++++++++++++++++++++++++++++++++++ 3 files changed, 276 insertions(+) create mode 100644 drivers/input/misc/evifpanel.c diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig index 23297ab..87ce0e6 100644 --- a/drivers/input/misc/Kconfig +++ b/drivers/input/misc/Kconfig @@ -222,6 +222,16 @@ config INPUT_APANEL To compile this driver as a module, choose M here: the module will be called apanel. +config INPUT_EVIFPANEL + tristate "Uniwest EVI Front panel" + select SERIO + help + Say Y if you have a Uniwest EVI and want to enable the + sliders and buttons on the front. + + To compile this driver as a module, choose M here: the + module will be called evifpanel. + config INPUT_GP2A tristate "Sharp GP2AP002A00F I2C Proximity/Opto sensor driver" depends on I2C diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile index 19c7603..5764467 100644 --- a/drivers/input/misc/Makefile +++ b/drivers/input/misc/Makefile @@ -28,6 +28,7 @@ obj-$(CONFIG_INPUT_DA9055_ONKEY) += da9055_onkey.o obj-$(CONFIG_INPUT_DM355EVM) += dm355evm_keys.o obj-$(CONFIG_INPUT_DRV260X_HAPTICS) += drv260x.o obj-$(CONFIG_INPUT_DRV2667_HAPTICS) += drv2667.o +obj-$(CONFIG_INPUT_EVIFPANEL) += evifpanel.o obj-$(CONFIG_INPUT_GP2A) += gp2ap002a00f.o obj-$(CONFIG_INPUT_GPIO_BEEPER) += gpio-beeper.o obj-$(CONFIG_INPUT_GPIO_TILT_POLLED) += gpio_tilt_polled.o diff --git a/drivers/input/misc/evifpanel.c b/drivers/input/misc/evifpanel.c new file mode 100644 index 0000000..aa28e6c --- /dev/null +++ b/drivers/input/misc/evifpanel.c @@ -0,0 +1,265 @@ +/* + * Uniwest EVI Front Panel driver + * + * Copyright 2015 United Western Technologies + * + * Joshua Clayton <[email protected]> + * + * This file is subject to the terms and conditions of the GNU General + * Public License. See the file "COPYING" in the main directory of this + * archive for more details. + */ +#include <linux/input.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/serio.h> +#include <linux/slab.h> + +#define DRIVER_DESC "Uniwest EVI Frontpanel input driver" +MODULE_AUTHOR("Joshua Clayton <[email protected]>"); +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_LICENSE("GPL"); + +struct evifpanel { + struct input_dev *dev; + struct serio *serio; + unsigned int bytes; + char name[64]; + char phys[32]; + unsigned char buf[8]; +}; + +struct key_map { + u16 type; + u16 code; + s32 value; + unsigned int byte; + unsigned int offset; +}; + +static struct key_map btns[] = { + { EV_KEY, KEY_F1, 1, 6, 0 }, + { EV_KEY, KEY_D, 1, 6, 1 }, + { EV_KEY, KEY_N, 1, 7, 0 }, + { EV_KEY, KEY_BACKSPACE, 1, 7, 1 }, + { EV_KEY, KEY_ENTER, 1, 7, 2 }, + { EV_KEY, KEY_ESC, 1, 7, 3 }, + { EV_KEY, KEY_F4, 1, 7, 4 }, + { EV_KEY, KEY_F3, 1, 7, 5 }, + { EV_KEY, KEY_F2, 1, 7, 6 }, + { }, +}; + +static void fp_check_key(struct evifpanel *fp, struct key_map *key) +{ + s32 value = fp->buf[key->byte] & BIT(key->offset); + + input_report_key(fp->dev, key->code, value); +} + +/* + * Check buttons against array of key_map + */ +static void fp_check_btns(struct evifpanel *fp, struct key_map *key) +{ + while (key->type) { + switch (key->type) { + case EV_KEY: + fp_check_key(fp, key); + break; + default: + break; /* ignore unknown types */ + } + key++; + } + + input_sync(fp->dev); +} + +/* + * Set the firmware version coming from the fp in an ascii file + */ +static void fp_set_fw_ver(struct evifpanel *fp) +{ + scnprintf(fp->serio->firmware_id, sizeof(fp->serio->firmware_id), + "evifpanel v%3.3u.%3.3u.%3.3u.%3.3u", fp->buf[4], + fp->buf[5], fp->buf[6], fp->buf[7]); + + dev_info(&fp->serio->dev, "firmware found: %s\n", + fp->serio->firmware_id); +} + +/* + * Request firmware version info from the device + */ +static void fp_request_fw_ver(struct evifpanel *fp) +{ + serio_write(fp->serio, '\xC0'); + serio_write(fp->serio, '\x00'); + serio_write(fp->serio, '\x00'); + serio_write(fp->serio, '\x09'); + serio_write(fp->serio, '\x00'); + serio_write(fp->serio, '\x01'); + serio_write(fp->serio, '\x00'); + serio_write(fp->serio, '\x00'); +} + +/* + * Send zero or more input events based on the state of the fp + * Call this when you have a full packet. + */ +static int fp_parse_buf(struct evifpanel *fp) +{ + switch (fp->buf[1]) { + case '\x03': + fp_check_btns(fp, btns); + break; + case '\x09': + if (fp->buf[4] || fp->buf[5]) + fp_set_fw_ver(fp); + break; + default: + dev_err(&fp->dev->dev, "Bad cmd id %X in sequence %llX\n", + fp->buf[1], *(u64 *)(fp->buf)); + + return -EIO; + } + + return 0; +} + +static void fp_add_byte(struct evifpanel *fp, unsigned char c) +{ + if (c != '\xC0' && !fp->bytes) { + dev_err(&fp->dev->dev, "drop %X. looking for check byte\n", c); + return; + } + + if (c == '\xC0' && fp->bytes) { + /* msg check byte should not be found in the middle of a set */ + dev_warn(&fp->dev->dev, "discarding %d bytes from %llX\n", + fp->bytes, *(u64 *)(fp->buf)); + fp->bytes = 0; + } + + fp->buf[fp->bytes] = c; + ++fp->bytes; +} + + +static irqreturn_t fp_interrupt(struct serio *serio, unsigned char data, + unsigned int flags) +{ + struct evifpanel *fp = serio_get_drvdata(serio); + + fp_add_byte(fp, data); + if (fp->bytes == 8) { + fp_parse_buf(fp); + fp->bytes = 0; + } + + return IRQ_HANDLED; +} + +static void fp_set_device_attrs(struct evifpanel *fp) +{ + snprintf(fp->name, sizeof(fp->name), + "EVI Frontpanel keypad and sliders"); + snprintf(fp->phys, sizeof(fp->phys), + "%s/input0", fp->serio->phys); + + fp->dev->name = fp->name; + fp->dev->phys = fp->phys; + fp->dev->id.bustype = BUS_RS232; + fp->dev->dev.parent = &fp->serio->dev; + + fp->dev->evbit[0] = BIT_MASK(EV_KEY); + __set_bit(KEY_D, fp->dev->keybit); + __set_bit(KEY_N, fp->dev->keybit); + __set_bit(KEY_BACKSPACE, fp->dev->keybit); + __set_bit(KEY_ENTER, fp->dev->keybit); + __set_bit(KEY_F1, fp->dev->keybit); + __set_bit(KEY_F2, fp->dev->keybit); + __set_bit(KEY_F3, fp->dev->keybit); + __set_bit(KEY_F4, fp->dev->keybit); + __set_bit(KEY_ESC, fp->dev->keybit); +} + +static int fp_connect(struct serio *serio, struct serio_driver *drv) +{ + struct evifpanel *fp; + struct input_dev *input_dev; + int error = -ENOMEM; + + fp = kzalloc(sizeof(struct evifpanel), GFP_KERNEL); + + input_dev = input_allocate_device(); + if (!input_dev || !fp) { + pr_err("evifpanel: failed to get memory\n"); + goto fail1; + } + + fp->dev = input_dev; + fp->serio = serio; + fp_set_device_attrs(fp); + serio_set_drvdata(serio, fp); + + error = serio_open(serio, drv); + if (error) { + pr_err("evifpanel: failed to open serio\n"); + goto fail2; + } + fp_request_fw_ver(fp); + + error = input_register_device(input_dev); + if (error) { + pr_err("evifpanel: failed to register input device\n"); + goto fail3; + } + + return 0; + +fail3: + serio_close(serio); +fail2: + serio_set_drvdata(serio, NULL); +fail1: + input_free_device(input_dev); + kfree(fp); + pr_err("fp_connect: FAILED\n"); + + return error; +} + +static void fp_disconnect(struct serio *serio) +{ + struct evifpanel *fp = serio_get_drvdata(serio); + + input_unregister_device(fp->dev); + serio_close(serio); + serio_set_drvdata(serio, NULL); + kfree(fp); +}; + +static struct serio_device_id fp_ids[] = { + { + .type = SERIO_RS232, + .proto = SERIO_ANY, + .id = SERIO_ANY, + .extra = SERIO_ANY, + }, + { 0 } +}; + +static struct serio_driver fp_drv = { + .driver = { + .name = "evifpanel", + }, + .description = DRIVER_DESC, + .id_table = fp_ids, + .connect = fp_connect, + .interrupt = fp_interrupt, + .disconnect = fp_disconnect, +}; + +module_serio_driver(fp_drv); -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
