#include <linux/input.h> #include <linux/module.h> #include <linux/init.h> #include <linux/interrupt.h> #include <asm/io.h> #include <asm/delay.h> #include <asm/adc.h> #include <asm/hp6xx/hp6xx.h> #define MODNAME "hp680_ts_input" #define HP680_TS_ABS_X_MIN 40 #define HP680_TS_ABS_X_MAX 950 #define HP680_TS_ABS_Y_MIN 80 #define HP680_TS_ABS_Y_MAX 910 #define SCPCR 0xa4000116 #define PHDR 0xa400012e #define SCPDR 0xa4000136 static void do_softint(void *data); static struct input_dev hp680_ts_dev; static DECLARE_WORK(work, do_softint, 0); static char *hp680_ts_name = "HP Jornada touchscreen"; static char *hp680_ts_phys = "input0"; static void do_softint(void *data) { int absx = 0, absy = 0; u8 scpdr; int touched = 0; 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); absy = 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); absx = 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_key(&hp680_ts_dev, BTN_TOUCH, 1); input_report_abs(&hp680_ts_dev, ABS_X, absx); input_report_abs(&hp680_ts_dev, ABS_Y, absy); } else { input_report_key(&hp680_ts_dev, BTN_TOUCH, 0); } input_sync(&hp680_ts_dev); enable_irq(HP680_TS_IRQ); } static irqreturn_t hp680_ts_interrupt(int irq, void *dev, struct pt_regs *regs) { disable_irq_nosync(irq); schedule_delayed_work(&work, HZ / 20); return IRQ_HANDLED; } static int __init hp680_ts_init(void) { u8 scpdr; u16 scpcr; scpdr = ctrl_inb(SCPDR); scpdr |= SCPDR_TS_SCAN_X | SCPDR_TS_SCAN_Y; scpdr &= ~SCPDR_TS_SCAN_ENABLE; ctrl_outb(scpdr, SCPDR); scpcr = ctrl_inw(SCPCR); scpcr &= ~SCPCR_TS_MASK; scpcr |= SCPCR_TS_ENABLE; ctrl_outw(scpcr, SCPCR); memset(&hp680_ts_dev, 0, sizeof(hp680_ts_dev)); init_input_dev(&hp680_ts_dev); hp680_ts_dev.evbit[0] = BIT(EV_ABS) | BIT(EV_KEY); hp680_ts_dev.absbit[0] = BIT(ABS_X) | BIT(ABS_Y); hp680_ts_dev.keybit[LONG(BTN_TOUCH)] = BIT(BTN_TOUCH); hp680_ts_dev.absmin[ABS_X] = HP680_TS_ABS_X_MIN; hp680_ts_dev.absmin[ABS_Y] = HP680_TS_ABS_Y_MIN; hp680_ts_dev.absmax[ABS_X] = HP680_TS_ABS_X_MAX; hp680_ts_dev.absmax[ABS_Y] = HP680_TS_ABS_Y_MAX; hp680_ts_dev.name = hp680_ts_name; hp680_ts_dev.phys = hp680_ts_phys; input_register_device(&hp680_ts_dev); if (request_irq (HP680_TS_IRQ, hp680_ts_interrupt, SA_INTERRUPT, MODNAME, 0) < 0) { printk(KERN_ERR "hp680_touchscreen.c : Can't allocate irq %d\n", HP680_TS_IRQ); input_unregister_device(&hp680_ts_dev); return -EBUSY; } return 0; } static void __exit hp680_ts_exit(void) { free_irq(HP680_TS_IRQ, 0); cancel_delayed_work(&work); flush_scheduled_work(); input_unregister_device(&hp680_ts_dev); } module_init(hp680_ts_init); module_exit(hp680_ts_exit); MODULE_AUTHOR("Andriy Skulysh, askulysh@image.kiev.ua"); MODULE_DESCRIPTION("HP Jornada 680 touchscreen driver"); MODULE_LICENSE("GPL");