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path: root/drivers/input/touchscreen/tnetv107x-ts.c
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Diffstat (limited to 'drivers/input/touchscreen/tnetv107x-ts.c')
-rw-r--r--drivers/input/touchscreen/tnetv107x-ts.c384
1 files changed, 0 insertions, 384 deletions
diff --git a/drivers/input/touchscreen/tnetv107x-ts.c b/drivers/input/touchscreen/tnetv107x-ts.c
deleted file mode 100644
index c47827a26e3c..000000000000
--- a/drivers/input/touchscreen/tnetv107x-ts.c
+++ /dev/null
@@ -1,384 +0,0 @@
-/*
- * Texas Instruments TNETV107X Touchscreen Driver
- *
- * Copyright (C) 2010 Texas Instruments
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation version 2.
- *
- * This program is distributed "as is" WITHOUT ANY WARRANTY of any
- * kind, whether express or implied; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/err.h>
-#include <linux/errno.h>
-#include <linux/input.h>
-#include <linux/platform_device.h>
-#include <linux/interrupt.h>
-#include <linux/slab.h>
-#include <linux/delay.h>
-#include <linux/ctype.h>
-#include <linux/io.h>
-#include <linux/clk.h>
-
-#include <mach/tnetv107x.h>
-
-#define TSC_PENUP_POLL (HZ / 5)
-#define IDLE_TIMEOUT 100 /* msec */
-
-/*
- * The first and last samples of a touch interval are usually garbage and need
- * to be filtered out with these devices. The following definitions control
- * the number of samples skipped.
- */
-#define TSC_HEAD_SKIP 1
-#define TSC_TAIL_SKIP 1
-#define TSC_SKIP (TSC_HEAD_SKIP + TSC_TAIL_SKIP + 1)
-#define TSC_SAMPLES (TSC_SKIP + 1)
-
-/* Register Offsets */
-struct tsc_regs {
- u32 rev;
- u32 tscm;
- u32 bwcm;
- u32 swc;
- u32 adcchnl;
- u32 adcdata;
- u32 chval[4];
-};
-
-/* TSC Mode Configuration Register (tscm) bits */
-#define WMODE BIT(0)
-#define TSKIND BIT(1)
-#define ZMEASURE_EN BIT(2)
-#define IDLE BIT(3)
-#define TSC_EN BIT(4)
-#define STOP BIT(5)
-#define ONE_SHOT BIT(6)
-#define SINGLE BIT(7)
-#define AVG BIT(8)
-#define AVGNUM(x) (((x) & 0x03) << 9)
-#define PVSTC(x) (((x) & 0x07) << 11)
-#define PON BIT(14)
-#define PONBG BIT(15)
-#define AFERST BIT(16)
-
-/* ADC DATA Capture Register bits */
-#define DATA_VALID BIT(16)
-
-/* Register Access Macros */
-#define tsc_read(ts, reg) __raw_readl(&(ts)->regs->reg)
-#define tsc_write(ts, reg, val) __raw_writel(val, &(ts)->regs->reg);
-#define tsc_set_bits(ts, reg, val) \
- tsc_write(ts, reg, tsc_read(ts, reg) | (val))
-#define tsc_clr_bits(ts, reg, val) \
- tsc_write(ts, reg, tsc_read(ts, reg) & ~(val))
-
-struct sample {
- int x, y, p;
-};
-
-struct tsc_data {
- struct input_dev *input_dev;
- struct resource *res;
- struct tsc_regs __iomem *regs;
- struct timer_list timer;
- spinlock_t lock;
- struct clk *clk;
- struct device *dev;
- int sample_count;
- struct sample samples[TSC_SAMPLES];
- int tsc_irq;
-};
-
-static int tsc_read_sample(struct tsc_data *ts, struct sample* sample)
-{
- int x, y, z1, z2, t, p = 0;
- u32 val;
-
- val = tsc_read(ts, chval[0]);
- if (val & DATA_VALID)
- x = val & 0xffff;
- else
- return -EINVAL;
-
- y = tsc_read(ts, chval[1]) & 0xffff;
- z1 = tsc_read(ts, chval[2]) & 0xffff;
- z2 = tsc_read(ts, chval[3]) & 0xffff;
-
- if (z1) {
- t = ((600 * x) * (z2 - z1));
- p = t / (u32) (z1 << 12);
- if (p < 0)
- p = 0;
- }
-
- sample->x = x;
- sample->y = y;
- sample->p = p;
-
- return 0;
-}
-
-static void tsc_poll(unsigned long data)
-{
- struct tsc_data *ts = (struct tsc_data *)data;
- unsigned long flags;
- int i, val, x, y, p;
-
- spin_lock_irqsave(&ts->lock, flags);
-
- if (ts->sample_count >= TSC_SKIP) {
- input_report_abs(ts->input_dev, ABS_PRESSURE, 0);
- input_report_key(ts->input_dev, BTN_TOUCH, 0);
- input_sync(ts->input_dev);
- } else if (ts->sample_count > 0) {
- /*
- * A touch event lasted less than our skip count. Salvage and
- * report anyway.
- */
- for (i = 0, val = 0; i < ts->sample_count; i++)
- val += ts->samples[i].x;
- x = val / ts->sample_count;
-
- for (i = 0, val = 0; i < ts->sample_count; i++)
- val += ts->samples[i].y;
- y = val / ts->sample_count;
-
- for (i = 0, val = 0; i < ts->sample_count; i++)
- val += ts->samples[i].p;
- p = val / ts->sample_count;
-
- input_report_abs(ts->input_dev, ABS_X, x);
- input_report_abs(ts->input_dev, ABS_Y, y);
- input_report_abs(ts->input_dev, ABS_PRESSURE, p);
- input_report_key(ts->input_dev, BTN_TOUCH, 1);
- input_sync(ts->input_dev);
- }
-
- ts->sample_count = 0;
-
- spin_unlock_irqrestore(&ts->lock, flags);
-}
-
-static irqreturn_t tsc_irq(int irq, void *dev_id)
-{
- struct tsc_data *ts = (struct tsc_data *)dev_id;
- struct sample *sample;
- int index;
-
- spin_lock(&ts->lock);
-
- index = ts->sample_count % TSC_SAMPLES;
- sample = &ts->samples[index];
- if (tsc_read_sample(ts, sample) < 0)
- goto out;
-
- if (++ts->sample_count >= TSC_SKIP) {
- index = (ts->sample_count - TSC_TAIL_SKIP - 1) % TSC_SAMPLES;
- sample = &ts->samples[index];
-
- input_report_abs(ts->input_dev, ABS_X, sample->x);
- input_report_abs(ts->input_dev, ABS_Y, sample->y);
- input_report_abs(ts->input_dev, ABS_PRESSURE, sample->p);
- if (ts->sample_count == TSC_SKIP)
- input_report_key(ts->input_dev, BTN_TOUCH, 1);
- input_sync(ts->input_dev);
- }
- mod_timer(&ts->timer, jiffies + TSC_PENUP_POLL);
-out:
- spin_unlock(&ts->lock);
- return IRQ_HANDLED;
-}
-
-static int tsc_start(struct input_dev *dev)
-{
- struct tsc_data *ts = input_get_drvdata(dev);
- unsigned long timeout = jiffies + msecs_to_jiffies(IDLE_TIMEOUT);
- u32 val;
-
- clk_enable(ts->clk);
-
- /* Go to idle mode, before any initialization */
- while (time_after(timeout, jiffies)) {
- if (tsc_read(ts, tscm) & IDLE)
- break;
- }
-
- if (time_before(timeout, jiffies)) {
- dev_warn(ts->dev, "timeout waiting for idle\n");
- clk_disable(ts->clk);
- return -EIO;
- }
-
- /* Configure TSC Control register*/
- val = (PONBG | PON | PVSTC(4) | ONE_SHOT | ZMEASURE_EN);
- tsc_write(ts, tscm, val);
-
- /* Bring TSC out of reset: Clear AFE reset bit */
- val &= ~(AFERST);
- tsc_write(ts, tscm, val);
-
- /* Configure all pins for hardware control*/
- tsc_write(ts, bwcm, 0);
-
- /* Finally enable the TSC */
- tsc_set_bits(ts, tscm, TSC_EN);
-
- return 0;
-}
-
-static void tsc_stop(struct input_dev *dev)
-{
- struct tsc_data *ts = input_get_drvdata(dev);
-
- tsc_clr_bits(ts, tscm, TSC_EN);
- synchronize_irq(ts->tsc_irq);
- del_timer_sync(&ts->timer);
- clk_disable(ts->clk);
-}
-
-static int tsc_probe(struct platform_device *pdev)
-{
- struct device *dev = &pdev->dev;
- struct tsc_data *ts;
- int error = 0;
- u32 rev = 0;
-
- ts = kzalloc(sizeof(struct tsc_data), GFP_KERNEL);
- if (!ts) {
- dev_err(dev, "cannot allocate device info\n");
- return -ENOMEM;
- }
-
- ts->dev = dev;
- spin_lock_init(&ts->lock);
- setup_timer(&ts->timer, tsc_poll, (unsigned long)ts);
- platform_set_drvdata(pdev, ts);
-
- ts->tsc_irq = platform_get_irq(pdev, 0);
- if (ts->tsc_irq < 0) {
- dev_err(dev, "cannot determine device interrupt\n");
- error = -ENODEV;
- goto error_res;
- }
-
- ts->res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!ts->res) {
- dev_err(dev, "cannot determine register area\n");
- error = -ENODEV;
- goto error_res;
- }
-
- if (!request_mem_region(ts->res->start, resource_size(ts->res),
- pdev->name)) {
- dev_err(dev, "cannot claim register memory\n");
- ts->res = NULL;
- error = -EINVAL;
- goto error_res;
- }
-
- ts->regs = ioremap(ts->res->start, resource_size(ts->res));
- if (!ts->regs) {
- dev_err(dev, "cannot map register memory\n");
- error = -ENOMEM;
- goto error_map;
- }
-
- ts->clk = clk_get(dev, NULL);
- if (IS_ERR(ts->clk)) {
- dev_err(dev, "cannot claim device clock\n");
- error = PTR_ERR(ts->clk);
- goto error_clk;
- }
-
- error = request_threaded_irq(ts->tsc_irq, NULL, tsc_irq, IRQF_ONESHOT,
- dev_name(dev), ts);
- if (error < 0) {
- dev_err(ts->dev, "Could not allocate ts irq\n");
- goto error_irq;
- }
-
- ts->input_dev = input_allocate_device();
- if (!ts->input_dev) {
- dev_err(dev, "cannot allocate input device\n");
- error = -ENOMEM;
- goto error_input;
- }
- input_set_drvdata(ts->input_dev, ts);
-
- ts->input_dev->name = pdev->name;
- ts->input_dev->id.bustype = BUS_HOST;
- ts->input_dev->dev.parent = &pdev->dev;
- ts->input_dev->open = tsc_start;
- ts->input_dev->close = tsc_stop;
-
- clk_enable(ts->clk);
- rev = tsc_read(ts, rev);
- ts->input_dev->id.product = ((rev >> 8) & 0x07);
- ts->input_dev->id.version = ((rev >> 16) & 0xfff);
- clk_disable(ts->clk);
-
- __set_bit(EV_KEY, ts->input_dev->evbit);
- __set_bit(EV_ABS, ts->input_dev->evbit);
- __set_bit(BTN_TOUCH, ts->input_dev->keybit);
-
- input_set_abs_params(ts->input_dev, ABS_X, 0, 0xffff, 5, 0);
- input_set_abs_params(ts->input_dev, ABS_Y, 0, 0xffff, 5, 0);
- input_set_abs_params(ts->input_dev, ABS_PRESSURE, 0, 4095, 128, 0);
-
- error = input_register_device(ts->input_dev);
- if (error < 0) {
- dev_err(dev, "failed input device registration\n");
- goto error_reg;
- }
-
- return 0;
-
-error_reg:
- input_free_device(ts->input_dev);
-error_input:
- free_irq(ts->tsc_irq, ts);
-error_irq:
- clk_put(ts->clk);
-error_clk:
- iounmap(ts->regs);
-error_map:
- release_mem_region(ts->res->start, resource_size(ts->res));
-error_res:
- kfree(ts);
-
- return error;
-}
-
-static int tsc_remove(struct platform_device *pdev)
-{
- struct tsc_data *ts = platform_get_drvdata(pdev);
-
- input_unregister_device(ts->input_dev);
- free_irq(ts->tsc_irq, ts);
- clk_put(ts->clk);
- iounmap(ts->regs);
- release_mem_region(ts->res->start, resource_size(ts->res));
- kfree(ts);
-
- return 0;
-}
-
-static struct platform_driver tsc_driver = {
- .probe = tsc_probe,
- .remove = tsc_remove,
- .driver.name = "tnetv107x-ts",
- .driver.owner = THIS_MODULE,
-};
-module_platform_driver(tsc_driver);
-
-MODULE_AUTHOR("Cyril Chemparathy");
-MODULE_DESCRIPTION("TNETV107X Touchscreen Driver");
-MODULE_ALIAS("platform:tnetv107x-ts");
-MODULE_LICENSE("GPL");
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.