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path: root/drivers/input/touchscreen/corgi_ts.c
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Diffstat (limited to 'drivers/input/touchscreen/corgi_ts.c')
-rw-r--r--drivers/input/touchscreen/corgi_ts.c380
1 files changed, 0 insertions, 380 deletions
diff --git a/drivers/input/touchscreen/corgi_ts.c b/drivers/input/touchscreen/corgi_ts.c
deleted file mode 100644
index 3f8b61cfbc3..00000000000
--- a/drivers/input/touchscreen/corgi_ts.c
+++ /dev/null
@@ -1,380 +0,0 @@
-/*
- * Touchscreen driver for Sharp Corgi models (SL-C7xx)
- *
- * Copyright (c) 2004-2005 Richard Purdie
- *
- * 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.
- *
- */
-
-
-#include <linux/delay.h>
-#include <linux/device.h>
-#include <linux/init.h>
-#include <linux/input.h>
-#include <linux/interrupt.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <asm/irq.h>
-
-#include <asm/arch/corgi.h>
-#include <asm/arch/hardware.h>
-#include <asm/arch/pxa-regs.h>
-
-
-#define PWR_MODE_ACTIVE 0
-#define PWR_MODE_SUSPEND 1
-
-#define X_AXIS_MAX 3830
-#define X_AXIS_MIN 150
-#define Y_AXIS_MAX 3830
-#define Y_AXIS_MIN 190
-#define PRESSURE_MIN 0
-#define PRESSURE_MAX 15000
-
-struct ts_event {
- short pressure;
- short x;
- short y;
-};
-
-struct corgi_ts {
- char phys[32];
- struct input_dev input;
- struct timer_list timer;
- struct ts_event tc;
- int pendown;
- int power_mode;
-};
-
-#define STATUS_HSYNC (GPLR(CORGI_GPIO_HSYNC) & GPIO_bit(CORGI_GPIO_HSYNC))
-
-#define SyncHS() while((STATUS_HSYNC) == 0); while((STATUS_HSYNC) != 0);
-#define CCNT(a) asm volatile ("mrc p14, 0, %0, C1, C0, 0" : "=r"(a))
-#define CCNT_ON() {int pmnc = 1; asm volatile ("mcr p14, 0, %0, C0, C0, 0" : : "r"(pmnc));}
-#define CCNT_OFF() {int pmnc = 0; asm volatile ("mcr p14, 0, %0, C0, C0, 0" : : "r"(pmnc));}
-
-#define WAIT_HS_400_VGA 7013U // 17.615us
-#define WAIT_HS_400_QVGA 16622U // 41.750us
-
-
-/* ADS7846 Touch Screen Controller bit definitions */
-#define ADSCTRL_PD0 (1u << 0) /* PD0 */
-#define ADSCTRL_PD1 (1u << 1) /* PD1 */
-#define ADSCTRL_DFR (1u << 2) /* SER/DFR */
-#define ADSCTRL_MOD (1u << 3) /* Mode */
-#define ADSCTRL_ADR_SH 4 /* Address setting */
-#define ADSCTRL_STS (1u << 7) /* Start Bit */
-
-/* External Functions */
-extern int w100fb_get_xres(void);
-extern int w100fb_get_blanking(void);
-extern int w100fb_get_fastsysclk(void);
-extern unsigned int get_clk_frequency_khz(int info);
-
-static unsigned long calc_waittime(void)
-{
- int w100fb_xres = w100fb_get_xres();
- unsigned int waittime = 0;
-
- if (w100fb_xres == 480 || w100fb_xres == 640) {
- waittime = WAIT_HS_400_VGA * get_clk_frequency_khz(0) / 398131U;
-
- if (w100fb_get_fastsysclk() == 100)
- waittime = waittime * 75 / 100;
-
- if (w100fb_xres == 640)
- waittime *= 3;
-
- return waittime;
- }
-
- return WAIT_HS_400_QVGA * get_clk_frequency_khz(0) / 398131U;
-}
-
-static int sync_receive_data_send_cmd(int doRecive, int doSend, unsigned int address, unsigned long wait_time)
-{
- int pos = 0;
- unsigned long timer1 = 0, timer2;
- int dosleep;
-
- dosleep = !w100fb_get_blanking();
-
- if (dosleep && doSend) {
- CCNT_ON();
- /* polling HSync */
- SyncHS();
- /* get CCNT */
- CCNT(timer1);
- }
-
- if (doRecive)
- pos = corgi_ssp_ads7846_get();
-
- if (doSend) {
- int cmd = ADSCTRL_PD0 | ADSCTRL_PD1 | (address << ADSCTRL_ADR_SH) | ADSCTRL_STS;
- /* dummy command */
- corgi_ssp_ads7846_put(cmd);
- corgi_ssp_ads7846_get();
-
- if (dosleep) {
- /* Wait after HSync */
- CCNT(timer2);
- if (timer2-timer1 > wait_time) {
- /* timeout */
- SyncHS();
- /* get OSCR */
- CCNT(timer1);
- /* Wait after HSync */
- CCNT(timer2);
- }
- while (timer2 - timer1 < wait_time)
- CCNT(timer2);
- }
- corgi_ssp_ads7846_put(cmd);
- if (dosleep)
- CCNT_OFF();
- }
- return pos;
-}
-
-static int read_xydata(struct corgi_ts *corgi_ts)
-{
- unsigned int x, y, z1, z2;
- unsigned long flags, wait_time;
-
- /* critical section */
- local_irq_save(flags);
- corgi_ssp_ads7846_lock();
- wait_time=calc_waittime();
-
- /* Y-axis */
- sync_receive_data_send_cmd(0, 1, 1u, wait_time);
-
- /* Y-axis */
- sync_receive_data_send_cmd(1, 1, 1u, wait_time);
-
- /* X-axis */
- y = sync_receive_data_send_cmd(1, 1, 5u, wait_time);
-
- /* Z1 */
- x = sync_receive_data_send_cmd(1, 1, 3u, wait_time);
-
- /* Z2 */
- z1 = sync_receive_data_send_cmd(1, 1, 4u, wait_time);
- z2 = sync_receive_data_send_cmd(1, 0, 4u, wait_time);
-
- /* Power-Down Enable */
- corgi_ssp_ads7846_put((1u << ADSCTRL_ADR_SH) | ADSCTRL_STS);
- corgi_ssp_ads7846_get();
-
- corgi_ssp_ads7846_unlock();
- local_irq_restore(flags);
-
- if (x== 0 || y == 0 || z1 == 0 || (x * (z2 - z1) / z1) >= 15000) {
- corgi_ts->tc.pressure = 0;
- return 0;
- }
-
- corgi_ts->tc.x = x;
- corgi_ts->tc.y = y;
- corgi_ts->tc.pressure = (x * (z2 - z1)) / z1;
- return 1;
-}
-
-static void new_data(struct corgi_ts *corgi_ts, struct pt_regs *regs)
-{
- if (corgi_ts->power_mode != PWR_MODE_ACTIVE)
- return;
-
- if (!corgi_ts->tc.pressure && corgi_ts->pendown == 0)
- return;
-
- if (regs)
- input_regs(&corgi_ts->input, regs);
-
- input_report_abs(&corgi_ts->input, ABS_X, corgi_ts->tc.x);
- input_report_abs(&corgi_ts->input, ABS_Y, corgi_ts->tc.y);
- input_report_abs(&corgi_ts->input, ABS_PRESSURE, corgi_ts->tc.pressure);
- input_report_key(&corgi_ts->input, BTN_TOUCH, (corgi_ts->pendown != 0));
- input_sync(&corgi_ts->input);
-}
-
-static void ts_interrupt_main(struct corgi_ts *corgi_ts, int isTimer, struct pt_regs *regs)
-{
- if ((GPLR(CORGI_GPIO_TP_INT) & GPIO_bit(CORGI_GPIO_TP_INT)) == 0) {
- /* Disable Interrupt */
- set_irq_type(CORGI_IRQ_GPIO_TP_INT, IRQT_NOEDGE);
- if (read_xydata(corgi_ts)) {
- corgi_ts->pendown = 1;
- new_data(corgi_ts, regs);
- }
- mod_timer(&corgi_ts->timer, jiffies + HZ / 100);
- } else {
- if (corgi_ts->pendown == 1 || corgi_ts->pendown == 2) {
- mod_timer(&corgi_ts->timer, jiffies + HZ / 100);
- corgi_ts->pendown++;
- return;
- }
-
- if (corgi_ts->pendown) {
- corgi_ts->tc.pressure = 0;
- new_data(corgi_ts, regs);
- }
-
- /* Enable Falling Edge */
- set_irq_type(CORGI_IRQ_GPIO_TP_INT, IRQT_FALLING);
- corgi_ts->pendown = 0;
- }
-}
-
-static void corgi_ts_timer(unsigned long data)
-{
- struct corgi_ts *corgits_data = (struct corgi_ts *) data;
- ts_interrupt_main(corgits_data, 1, NULL);
-}
-
-static irqreturn_t ts_interrupt(int irq, void *dev_id, struct pt_regs *regs)
-{
- struct corgi_ts *corgits_data = dev_id;
- ts_interrupt_main(corgits_data, 0, regs);
- return IRQ_HANDLED;
-}
-
-#ifdef CONFIG_PM
-static int corgits_suspend(struct device *dev, uint32_t state, uint32_t level)
-{
- if (level == SUSPEND_POWER_DOWN) {
- struct corgi_ts *corgi_ts = dev_get_drvdata(dev);
-
- if (corgi_ts->pendown) {
- del_timer_sync(&corgi_ts->timer);
- corgi_ts->tc.pressure = 0;
- new_data(corgi_ts, NULL);
- corgi_ts->pendown = 0;
- }
- corgi_ts->power_mode = PWR_MODE_SUSPEND;
-
- corgi_ssp_ads7846_putget((1u << ADSCTRL_ADR_SH) | ADSCTRL_STS);
- }
- return 0;
-}
-
-static int corgits_resume(struct device *dev, uint32_t level)
-{
- if (level == RESUME_POWER_ON) {
- struct corgi_ts *corgi_ts = dev_get_drvdata(dev);
-
- corgi_ssp_ads7846_putget((4u << ADSCTRL_ADR_SH) | ADSCTRL_STS);
- /* Enable Falling Edge */
- set_irq_type(CORGI_IRQ_GPIO_TP_INT, IRQT_FALLING);
- corgi_ts->power_mode = PWR_MODE_ACTIVE;
- }
- return 0;
-}
-#else
-#define corgits_suspend NULL
-#define corgits_resume NULL
-#endif
-
-static int __init corgits_probe(struct device *dev)
-{
- struct corgi_ts *corgi_ts;
-
- if (!(corgi_ts = kmalloc(sizeof(struct corgi_ts), GFP_KERNEL)))
- return -ENOMEM;
-
- dev_set_drvdata(dev, corgi_ts);
-
- memset(corgi_ts, 0, sizeof(struct corgi_ts));
-
- init_input_dev(&corgi_ts->input);
- corgi_ts->input.evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
- corgi_ts->input.keybit[LONG(BTN_TOUCH)] = BIT(BTN_TOUCH);
- input_set_abs_params(&corgi_ts->input, ABS_X, X_AXIS_MIN, X_AXIS_MAX, 0, 0);
- input_set_abs_params(&corgi_ts->input, ABS_Y, Y_AXIS_MIN, Y_AXIS_MAX, 0, 0);
- input_set_abs_params(&corgi_ts->input, ABS_PRESSURE, PRESSURE_MIN, PRESSURE_MAX, 0, 0);
-
- strcpy(corgi_ts->phys, "corgits/input0");
-
- corgi_ts->input.private = corgi_ts;
- corgi_ts->input.name = "Corgi Touchscreen";
- corgi_ts->input.dev = dev;
- corgi_ts->input.phys = corgi_ts->phys;
- corgi_ts->input.id.bustype = BUS_HOST;
- corgi_ts->input.id.vendor = 0x0001;
- corgi_ts->input.id.product = 0x0002;
- corgi_ts->input.id.version = 0x0100;
-
- pxa_gpio_mode(CORGI_GPIO_TP_INT | GPIO_IN);
- pxa_gpio_mode(CORGI_GPIO_HSYNC | GPIO_IN);
-
- /* Initiaize ADS7846 Difference Reference mode */
- corgi_ssp_ads7846_putget((1u << ADSCTRL_ADR_SH) | ADSCTRL_STS);
- mdelay(5);
- corgi_ssp_ads7846_putget((3u << ADSCTRL_ADR_SH) | ADSCTRL_STS);
- mdelay(5);
- corgi_ssp_ads7846_putget((4u << ADSCTRL_ADR_SH) | ADSCTRL_STS);
- mdelay(5);
- corgi_ssp_ads7846_putget((5u << ADSCTRL_ADR_SH) | ADSCTRL_STS);
- mdelay(5);
-
- init_timer(&corgi_ts->timer);
- corgi_ts->timer.data = (unsigned long) corgi_ts;
- corgi_ts->timer.function = corgi_ts_timer;
-
- input_register_device(&corgi_ts->input);
- corgi_ts->power_mode = PWR_MODE_ACTIVE;
-
- if (request_irq(CORGI_IRQ_GPIO_TP_INT, ts_interrupt, SA_INTERRUPT, "ts", corgi_ts)) {
- input_unregister_device(&corgi_ts->input);
- kfree(corgi_ts);
- return -EBUSY;
- }
-
- /* Enable Falling Edge */
- set_irq_type(CORGI_IRQ_GPIO_TP_INT, IRQT_FALLING);
-
- printk(KERN_INFO "input: Corgi Touchscreen Registered\n");
-
- return 0;
-}
-
-static int corgits_remove(struct device *dev)
-{
- struct corgi_ts *corgi_ts = dev_get_drvdata(dev);
-
- free_irq(CORGI_IRQ_GPIO_TP_INT, NULL);
- del_timer_sync(&corgi_ts->timer);
- input_unregister_device(&corgi_ts->input);
- kfree(corgi_ts);
- return 0;
-}
-
-static struct device_driver corgits_driver = {
- .name = "corgi-ts",
- .bus = &platform_bus_type,
- .probe = corgits_probe,
- .remove = corgits_remove,
- .suspend = corgits_suspend,
- .resume = corgits_resume,
-};
-
-static int __devinit corgits_init(void)
-{
- return driver_register(&corgits_driver);
-}
-
-static void __exit corgits_exit(void)
-{
- driver_unregister(&corgits_driver);
-}
-
-module_init(corgits_init);
-module_exit(corgits_exit);
-
-MODULE_AUTHOR("Richard Purdie <rpurdie@rpsys.net>");
-MODULE_DESCRIPTION("Corgi TouchScreen Driver");
-MODULE_LICENSE("GPL");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-13 11:32:13 +0000