diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/input/touchscreen/elo.c |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'drivers/input/touchscreen/elo.c')
-rw-r--r-- | drivers/input/touchscreen/elo.c | 315 |
1 files changed, 315 insertions, 0 deletions
diff --git a/drivers/input/touchscreen/elo.c b/drivers/input/touchscreen/elo.c new file mode 100644 index 000000000000..546ce599334e --- /dev/null +++ b/drivers/input/touchscreen/elo.c @@ -0,0 +1,315 @@ +/* + * Elo serial touchscreen driver + * + * Copyright (c) 2004 Vojtech Pavlik + */ + +/* + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published by + * the Free Software Foundation. + */ + +/* + * This driver can handle serial Elo touchscreens using either the Elo standard + * 'E271-2210' 10-byte protocol, Elo legacy 'E281A-4002' 6-byte protocol, Elo + * legacy 'E271-140' 4-byte protocol and Elo legacy 'E261-280' 3-byte protocol. + */ + +#include <linux/errno.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/input.h> +#include <linux/serio.h> +#include <linux/init.h> + +#define DRIVER_DESC "Elo serial touchscreen driver" + +MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_LICENSE("GPL"); + +/* + * Definitions & global arrays. + */ + +#define ELO_MAX_LENGTH 10 + +static char *elo_name = "Elo Serial TouchScreen"; + +/* + * Per-touchscreen data. + */ + +struct elo { + struct input_dev dev; + struct serio *serio; + int id; + int idx; + unsigned char csum; + unsigned char data[ELO_MAX_LENGTH]; + char phys[32]; +}; + +static void elo_process_data_10(struct elo* elo, unsigned char data, struct pt_regs *regs) +{ + struct input_dev *dev = &elo->dev; + + elo->csum += elo->data[elo->idx] = data; + + switch (elo->idx++) { + + case 0: + if (data != 'U') { + elo->idx = 0; + elo->csum = 0; + } + break; + + case 1: + if (data != 'T') { + elo->idx = 0; + elo->csum = 0; + } + break; + + case 9: + if (elo->csum) { + input_regs(dev, regs); + input_report_abs(dev, ABS_X, (elo->data[4] << 8) | elo->data[3]); + input_report_abs(dev, ABS_Y, (elo->data[6] << 8) | elo->data[5]); + input_report_abs(dev, ABS_PRESSURE, (elo->data[8] << 8) | elo->data[7]); + input_report_key(dev, BTN_TOUCH, elo->data[2] & 3); + input_sync(dev); + } + elo->idx = 0; + elo->csum = 0; + break; + } +} + +static void elo_process_data_6(struct elo* elo, unsigned char data, struct pt_regs *regs) +{ + struct input_dev *dev = &elo->dev; + + elo->data[elo->idx] = data; + + switch (elo->idx++) { + + case 0: if ((data & 0xc0) != 0xc0) elo->idx = 0; break; + case 1: if ((data & 0xc0) != 0x80) elo->idx = 0; break; + case 2: if ((data & 0xc0) != 0x40) elo->idx = 0; break; + + case 3: + if (data & 0xc0) { + elo->idx = 0; + break; + } + + input_regs(dev, regs); + input_report_abs(dev, ABS_X, ((elo->data[0] & 0x3f) << 6) | (elo->data[1] & 0x3f)); + input_report_abs(dev, ABS_Y, ((elo->data[2] & 0x3f) << 6) | (elo->data[3] & 0x3f)); + + if (elo->id == 2) { + input_report_key(dev, BTN_TOUCH, 1); + input_sync(dev); + elo->idx = 0; + } + + break; + + case 4: + if (data) { + input_sync(dev); + elo->idx = 0; + } + break; + + case 5: + if ((data & 0xf0) == 0) { + input_report_abs(dev, ABS_PRESSURE, elo->data[5]); + input_report_key(dev, BTN_TOUCH, elo->data[5]); + } + input_sync(dev); + elo->idx = 0; + break; + } +} + +static void elo_process_data_3(struct elo* elo, unsigned char data, struct pt_regs *regs) +{ + struct input_dev *dev = &elo->dev; + + elo->data[elo->idx] = data; + + switch (elo->idx++) { + + case 0: + if ((data & 0x7f) != 0x01) + elo->idx = 0; + break; + case 2: + input_regs(dev, regs); + input_report_key(dev, BTN_TOUCH, !(elo->data[1] & 0x80)); + input_report_abs(dev, ABS_X, elo->data[1]); + input_report_abs(dev, ABS_Y, elo->data[2]); + input_sync(dev); + elo->idx = 0; + break; + } +} + +static irqreturn_t elo_interrupt(struct serio *serio, + unsigned char data, unsigned int flags, struct pt_regs *regs) +{ + struct elo* elo = serio_get_drvdata(serio); + + switch(elo->id) { + case 0: + elo_process_data_10(elo, data, regs); + break; + + case 1: + case 2: + elo_process_data_6(elo, data, regs); + break; + + case 3: + elo_process_data_3(elo, data, regs); + break; + } + + return IRQ_HANDLED; +} + +/* + * elo_disconnect() is the opposite of elo_connect() + */ + +static void elo_disconnect(struct serio *serio) +{ + struct elo* elo = serio_get_drvdata(serio); + + input_unregister_device(&elo->dev); + serio_close(serio); + serio_set_drvdata(serio, NULL); + kfree(elo); +} + +/* + * elo_connect() is the routine that is called when someone adds a + * new serio device that supports Gunze protocol and registers it as + * an input device. + */ + +static int elo_connect(struct serio *serio, struct serio_driver *drv) +{ + struct elo *elo; + int err; + + if (!(elo = kmalloc(sizeof(struct elo), GFP_KERNEL))) + return -ENOMEM; + + memset(elo, 0, sizeof(struct elo)); + + init_input_dev(&elo->dev); + elo->dev.evbit[0] = BIT(EV_KEY) | BIT(EV_ABS); + elo->dev.keybit[LONG(BTN_TOUCH)] = BIT(BTN_TOUCH); + + elo->id = serio->id.id; + + switch (elo->id) { + + case 0: /* 10-byte protocol */ + input_set_abs_params(&elo->dev, ABS_X, 96, 4000, 0, 0); + input_set_abs_params(&elo->dev, ABS_Y, 96, 4000, 0, 0); + input_set_abs_params(&elo->dev, ABS_PRESSURE, 0, 255, 0, 0); + break; + + case 1: /* 6-byte protocol */ + input_set_abs_params(&elo->dev, ABS_PRESSURE, 0, 15, 0, 0); + + case 2: /* 4-byte protocol */ + input_set_abs_params(&elo->dev, ABS_X, 96, 4000, 0, 0); + input_set_abs_params(&elo->dev, ABS_Y, 96, 4000, 0, 0); + break; + + case 3: /* 3-byte protocol */ + input_set_abs_params(&elo->dev, ABS_X, 0, 255, 0, 0); + input_set_abs_params(&elo->dev, ABS_Y, 0, 255, 0, 0); + break; + } + + elo->serio = serio; + + sprintf(elo->phys, "%s/input0", serio->phys); + + elo->dev.private = elo; + elo->dev.name = elo_name; + elo->dev.phys = elo->phys; + elo->dev.id.bustype = BUS_RS232; + elo->dev.id.vendor = SERIO_ELO; + elo->dev.id.product = elo->id; + elo->dev.id.version = 0x0100; + + serio_set_drvdata(serio, elo); + + err = serio_open(serio, drv); + if (err) { + serio_set_drvdata(serio, NULL); + kfree(elo); + return err; + } + + input_register_device(&elo->dev); + + printk(KERN_INFO "input: %s on %s\n", elo_name, serio->phys); + + return 0; +} + +/* + * The serio driver structure. + */ + +static struct serio_device_id elo_serio_ids[] = { + { + .type = SERIO_RS232, + .proto = SERIO_ELO, + .id = SERIO_ANY, + .extra = SERIO_ANY, + }, + { 0 } +}; + +MODULE_DEVICE_TABLE(serio, elo_serio_ids); + +static struct serio_driver elo_drv = { + .driver = { + .name = "elo", + }, + .description = DRIVER_DESC, + .id_table = elo_serio_ids, + .interrupt = elo_interrupt, + .connect = elo_connect, + .disconnect = elo_disconnect, +}; + +/* + * The functions for inserting/removing us as a module. + */ + +static int __init elo_init(void) +{ + serio_register_driver(&elo_drv); + return 0; +} + +static void __exit elo_exit(void) +{ + serio_unregister_driver(&elo_drv); +} + +module_init(elo_init); +module_exit(elo_exit); |