diff options
Diffstat (limited to 'drivers/input/touchscreen/jornada6xx_ts.c')
| -rw-r--r-- | drivers/input/touchscreen/jornada6xx_ts.c | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/drivers/input/touchscreen/jornada6xx_ts.c b/drivers/input/touchscreen/jornada6xx_ts.c new file mode 100644 index 00000000000000..0fce0a593a521b --- /dev/null +++ b/drivers/input/touchscreen/jornada6xx_ts.c @@ -0,0 +1,156 @@ +/* + * Platform driver for the HP Jornada 620/660/680/690 Touchscreen. + * + * Copyright 2008 Kristoffer Ericson <kristoffer.ericson@gmail.com> + * Copyright ...-2007 Andriy Skulysh <askulysh@image.kiev.ua> + */ +#include <linux/input.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/platform_device.h> +#include <linux/workqueue.h> + +#include <asm/io.h> +#include <asm/delay.h> +#include <asm/adc.h> +#include <asm/hp6xx.h> + +#define MODNAME "hp680_ts_input" + +#define PHDR 0xa400012e /* PORT H DATA REGISTER */ +#define SCPDR 0xa4000136 /* PORT SC DATA REGISTER */ + +struct input_dev *dev; +static void do_softint(struct delayed_work *work); +static DECLARE_DELAYED_WORK(work, do_softint); + +static void do_softint(struct delayed_work *work) +{ + u8 scpdr; + int touched = 0; + int x, y; + + if (ctrl_inb(PHDR) & PHDR_TS_PEN_DOWN) { + scpdr = ctrl_inb(SCPDR); + scpdr |= SCPDR_TS_SCAN_ENABLE; + scpdr &= ~SCPDR_TS_SCAN_Y; + ctrl_outb(scpdr, SCPDR); + udelay(30); + + y = adc_single(ADC_CHANNEL_TS_Y); + + scpdr = ctrl_inb(SCPDR); + scpdr |= SCPDR_TS_SCAN_Y; + scpdr &= ~SCPDR_TS_SCAN_X; + ctrl_outb(scpdr, SCPDR); + udelay(30); + + x = adc_single(ADC_CHANNEL_TS_X); + + scpdr = ctrl_inb(SCPDR); + scpdr |= SCPDR_TS_SCAN_X; + scpdr &= ~SCPDR_TS_SCAN_ENABLE; + ctrl_outb(scpdr, SCPDR); + udelay(100); + touched = ctrl_inb(PHDR) & PHDR_TS_PEN_DOWN; + } + + if (touched) { + input_report_abs(dev, ABS_X, x); + input_report_abs(dev, ABS_Y, y); + input_report_abs(dev, ABS_PRESSURE, 1); + input_report_key(dev, BTN_TOUCH, 1); + input_sync(dev); + } else { + input_report_abs(dev, ABS_PRESSURE, 0); + input_report_key(dev, BTN_TOUCH, 0); + input_sync(dev); + } + enable_irq(HP680_TS_IRQ); +} + +static irqreturn_t hp680_ts_interrupt(int irq, void *pdev) +{ + disable_irq_nosync(irq); + schedule_delayed_work(&work, HZ / 20); + return IRQ_HANDLED; +} + +static int __devinit jornada680_ts_probe(struct platform_device *pdev) +{ + int error; + + dev = input_allocate_device(); + + if (!dev) { + printk(KERN_INFO "ts: failed to allocate device\n"); + error = -ENODEV; + return error; + } + + dev->name = "HP Jornada 6xx Touchscreen"; + dev->phys = "jornadats/input0"; + dev->id.bustype = BUS_HOST; + dev->dev.parent = &pdev->dev; + dev->evbit[0] = BIT_MASK(EV_ABS) | BIT_MASK(EV_KEY); + dev->absbit[0] = BIT_MASK(ABS_X) | BIT_MASK(ABS_Y) | BIT_MASK(ABS_PRESSURE); + dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH); + + input_set_abs_params(dev, ABS_X, 40, 950, 0, 0); + input_set_abs_params(dev, ABS_Y, 80, 910, 0, 0); + + error = input_register_device(dev); + if (error) + goto fail2; + + error = request_irq(HP680_TS_IRQ, hp680_ts_interrupt, + IRQF_DISABLED, "HP6xx Touchscreen Driver", NULL); + + if (error) { + printk(KERN_INFO "ts: Unable to aquire irq %d\n", HP680_TS_IRQ); + error = -ENODEV; + goto fail3; + } + + return 0; + +fail3: + input_unregister_device(dev); +fail2: + input_free_device(dev); + return error; +} + +static int __devexit jornada680_ts_remove(struct platform_device *pdev) +{ + cancel_delayed_work(&work); + flush_scheduled_work(); + free_irq(HP680_TS_IRQ, pdev); + input_unregister_device(dev); + return 0; +} + +static struct platform_driver jornada680_ts_driver = { + .probe = jornada680_ts_probe, + .remove = __devexit(jornada680_ts_remove), + .driver = { + .name = "jornada_ts", + }, +}; + +static int __init hp680_ts_init(void) +{ + return platform_driver_register(&jornada680_ts_driver); +} + +static void __exit hp680_ts_exit(void) +{ + platform_driver_unregister(&jornada680_ts_driver); +} +module_init(hp680_ts_init); +module_exit(hp680_ts_exit); + +MODULE_AUTHOR("Andriy Skulysh <askulysh@image.kiev.ua>, Kristoffer Ericson <Kristoffer.Ericson@gmail.com>"); +MODULE_DESCRIPTION("HP Jornada 6xx touchscreen driver"); +MODULE_LICENSE("GPL"); |