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authorLinus Torvalds <torvalds@linux-foundation.org>2023-02-21 02:28:57 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2023-02-21 02:28:57 +0300
commitff0c7e18629b8bd64681313a88ce55e182c9fee6 (patch)
tree70efa650f6458514e1d7e5e3f72cc8f87fc5cf2c /drivers/input/touchscreen/ucb1400_ts.c
parent5b0ed5964928b0aaf0d644c17c886c7f5ea4bb3f (diff)
parenta1f925bc4fa899b3c0f2dcbc432d572c36e74e71 (diff)
downloadlinux-ff0c7e18629b8bd64681313a88ce55e182c9fee6.tar.xz
Merge tag 'arm-boardfile-remove-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
Pull ARM SoC boardfile updates from Arnd Bergmann "Unused boardfile removal for 6.3 This is a follow-up to the deprecation of most of the old-style board files that was merged in linux-6.0, removing them for good. This branch is almost exclusively dead code removal based on those annotations. Some device driver removals went through separate subsystem trees, but the majority is in the same branch, in order to better handle dependencies between the patches and avoid breaking bisection. Unfortunately that leads to merge conflicts against other changes in the subsystem trees, but they should all be trivial to resolve by removing the files. See commit 7d0d3fa7339e ("Merge tag 'arm-boardfiles-6.0' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc") for the description of which machines were marked unused and are now removed. The only removals that got postponed are Terastation WXL (mv78xx0) and Jornada720 (StrongARM1100), which turned out to still have potential users" * tag 'arm-boardfile-remove-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (91 commits) mmc: omap: drop TPS65010 dependency ARM: pxa: restore mfp-pxa320.h usb: ohci-omap: avoid unused-variable warning ARM: debug: remove references in DEBUG_UART_8250_SHIFT to removed configs ARM: s3c: remove obsolete s3c-cpu-freq header MAINTAINERS: adjust SAMSUNG SOC CLOCK DRIVERS after s3c24xx support removal MAINTAINERS: update file entries after arm multi-platform rework and mach-pxa removal ARM: remove CONFIG_UNUSED_BOARD_FILES mfd: remove htc-pasic3 driver w1: remove ds1wm driver usb: remove ohci-tmio driver fbdev: remove w100fb driver fbdev: remove tmiofb driver mmc: remove tmio_mmc driver mfd: remove ucb1400 support mfd: remove toshiba tmio drivers rtc: remove v3020 driver power: remove pda_power supply driver ASoC: pxa: remove unused board support pcmcia: remove unused pxa/sa1100 drivers ...
Diffstat (limited to 'drivers/input/touchscreen/ucb1400_ts.c')
-rw-r--r--drivers/input/touchscreen/ucb1400_ts.c458
1 files changed, 0 insertions, 458 deletions
diff --git a/drivers/input/touchscreen/ucb1400_ts.c b/drivers/input/touchscreen/ucb1400_ts.c
deleted file mode 100644
index dfd3b35590c3..000000000000
--- a/drivers/input/touchscreen/ucb1400_ts.c
+++ /dev/null
@@ -1,458 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Philips UCB1400 touchscreen driver
- *
- * Author: Nicolas Pitre
- * Created: September 25, 2006
- * Copyright: MontaVista Software, Inc.
- *
- * Spliting done by: Marek Vasut <marek.vasut@gmail.com>
- * If something doesn't work and it worked before spliting, e-mail me,
- * dont bother Nicolas please ;-)
- *
- * This code is heavily based on ucb1x00-*.c copyrighted by Russell King
- * covering the UCB1100, UCB1200 and UCB1300.. Support for the UCB1400 has
- * been made separate from ucb1x00-core/ucb1x00-ts on Russell's request.
- */
-
-#include <linux/module.h>
-#include <linux/delay.h>
-#include <linux/sched.h>
-#include <linux/wait.h>
-#include <linux/input.h>
-#include <linux/device.h>
-#include <linux/interrupt.h>
-#include <linux/ucb1400.h>
-
-#define UCB1400_TS_POLL_PERIOD 10 /* ms */
-
-static bool adcsync;
-static int ts_delay = 55; /* us */
-static int ts_delay_pressure; /* us */
-
-/* Switch to interrupt mode. */
-static void ucb1400_ts_mode_int(struct ucb1400_ts *ucb)
-{
- ucb1400_reg_write(ucb->ac97, UCB_TS_CR,
- UCB_TS_CR_TSMX_POW | UCB_TS_CR_TSPX_POW |
- UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_GND |
- UCB_TS_CR_MODE_INT);
-}
-
-/*
- * Switch to pressure mode, and read pressure. We don't need to wait
- * here, since both plates are being driven.
- */
-static unsigned int ucb1400_ts_read_pressure(struct ucb1400_ts *ucb)
-{
- ucb1400_reg_write(ucb->ac97, UCB_TS_CR,
- UCB_TS_CR_TSMX_POW | UCB_TS_CR_TSPX_POW |
- UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_GND |
- UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA);
-
- udelay(ts_delay_pressure);
-
- return ucb1400_adc_read(ucb->ac97, UCB_ADC_INP_TSPY, adcsync);
-}
-
-/*
- * Switch to X position mode and measure Y plate. We switch the plate
- * configuration in pressure mode, then switch to position mode. This
- * gives a faster response time. Even so, we need to wait about 55us
- * for things to stabilise.
- */
-static unsigned int ucb1400_ts_read_xpos(struct ucb1400_ts *ucb)
-{
- ucb1400_reg_write(ucb->ac97, UCB_TS_CR,
- UCB_TS_CR_TSMX_GND | UCB_TS_CR_TSPX_POW |
- UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA);
- ucb1400_reg_write(ucb->ac97, UCB_TS_CR,
- UCB_TS_CR_TSMX_GND | UCB_TS_CR_TSPX_POW |
- UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA);
- ucb1400_reg_write(ucb->ac97, UCB_TS_CR,
- UCB_TS_CR_TSMX_GND | UCB_TS_CR_TSPX_POW |
- UCB_TS_CR_MODE_POS | UCB_TS_CR_BIAS_ENA);
-
- udelay(ts_delay);
-
- return ucb1400_adc_read(ucb->ac97, UCB_ADC_INP_TSPY, adcsync);
-}
-
-/*
- * Switch to Y position mode and measure X plate. We switch the plate
- * configuration in pressure mode, then switch to position mode. This
- * gives a faster response time. Even so, we need to wait about 55us
- * for things to stabilise.
- */
-static int ucb1400_ts_read_ypos(struct ucb1400_ts *ucb)
-{
- ucb1400_reg_write(ucb->ac97, UCB_TS_CR,
- UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_POW |
- UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA);
- ucb1400_reg_write(ucb->ac97, UCB_TS_CR,
- UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_POW |
- UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA);
- ucb1400_reg_write(ucb->ac97, UCB_TS_CR,
- UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_POW |
- UCB_TS_CR_MODE_POS | UCB_TS_CR_BIAS_ENA);
-
- udelay(ts_delay);
-
- return ucb1400_adc_read(ucb->ac97, UCB_ADC_INP_TSPX, adcsync);
-}
-
-/*
- * Switch to X plate resistance mode. Set MX to ground, PX to
- * supply. Measure current.
- */
-static unsigned int ucb1400_ts_read_xres(struct ucb1400_ts *ucb)
-{
- ucb1400_reg_write(ucb->ac97, UCB_TS_CR,
- UCB_TS_CR_TSMX_GND | UCB_TS_CR_TSPX_POW |
- UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA);
- return ucb1400_adc_read(ucb->ac97, 0, adcsync);
-}
-
-/*
- * Switch to Y plate resistance mode. Set MY to ground, PY to
- * supply. Measure current.
- */
-static unsigned int ucb1400_ts_read_yres(struct ucb1400_ts *ucb)
-{
- ucb1400_reg_write(ucb->ac97, UCB_TS_CR,
- UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_POW |
- UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA);
- return ucb1400_adc_read(ucb->ac97, 0, adcsync);
-}
-
-static int ucb1400_ts_pen_up(struct ucb1400_ts *ucb)
-{
- unsigned short val = ucb1400_reg_read(ucb->ac97, UCB_TS_CR);
-
- return val & (UCB_TS_CR_TSPX_LOW | UCB_TS_CR_TSMX_LOW);
-}
-
-static void ucb1400_ts_irq_enable(struct ucb1400_ts *ucb)
-{
- ucb1400_reg_write(ucb->ac97, UCB_IE_CLEAR, UCB_IE_TSPX);
- ucb1400_reg_write(ucb->ac97, UCB_IE_CLEAR, 0);
- ucb1400_reg_write(ucb->ac97, UCB_IE_FAL, UCB_IE_TSPX);
-}
-
-static void ucb1400_ts_irq_disable(struct ucb1400_ts *ucb)
-{
- ucb1400_reg_write(ucb->ac97, UCB_IE_FAL, 0);
-}
-
-static void ucb1400_ts_report_event(struct input_dev *idev, u16 pressure, u16 x, u16 y)
-{
- input_report_abs(idev, ABS_X, x);
- input_report_abs(idev, ABS_Y, y);
- input_report_abs(idev, ABS_PRESSURE, pressure);
- input_report_key(idev, BTN_TOUCH, 1);
- input_sync(idev);
-}
-
-static void ucb1400_ts_event_release(struct input_dev *idev)
-{
- input_report_abs(idev, ABS_PRESSURE, 0);
- input_report_key(idev, BTN_TOUCH, 0);
- input_sync(idev);
-}
-
-static void ucb1400_clear_pending_irq(struct ucb1400_ts *ucb)
-{
- unsigned int isr;
-
- isr = ucb1400_reg_read(ucb->ac97, UCB_IE_STATUS);
- ucb1400_reg_write(ucb->ac97, UCB_IE_CLEAR, isr);
- ucb1400_reg_write(ucb->ac97, UCB_IE_CLEAR, 0);
-
- if (isr & UCB_IE_TSPX)
- ucb1400_ts_irq_disable(ucb);
- else
- dev_dbg(&ucb->ts_idev->dev,
- "ucb1400: unexpected IE_STATUS = %#x\n", isr);
-}
-
-/*
- * A restriction with interrupts exists when using the ucb1400, as
- * the codec read/write routines may sleep while waiting for codec
- * access completion and uses semaphores for access control to the
- * AC97 bus. Therefore the driver is forced to use threaded interrupt
- * handler.
- */
-static irqreturn_t ucb1400_irq(int irqnr, void *devid)
-{
- struct ucb1400_ts *ucb = devid;
- unsigned int x, y, p;
-
- if (unlikely(irqnr != ucb->irq))
- return IRQ_NONE;
-
- ucb1400_clear_pending_irq(ucb);
-
- /* Start with a small delay before checking pendown state */
- msleep(UCB1400_TS_POLL_PERIOD);
-
- while (!ucb->stopped && !ucb1400_ts_pen_up(ucb)) {
- ucb1400_adc_enable(ucb->ac97);
- x = ucb1400_ts_read_xpos(ucb);
- y = ucb1400_ts_read_ypos(ucb);
- p = ucb1400_ts_read_pressure(ucb);
- ucb1400_adc_disable(ucb->ac97);
-
- ucb1400_ts_report_event(ucb->ts_idev, p, x, y);
-
- wait_event_timeout(ucb->ts_wait, ucb->stopped,
- msecs_to_jiffies(UCB1400_TS_POLL_PERIOD));
- }
-
- ucb1400_ts_event_release(ucb->ts_idev);
-
- if (!ucb->stopped) {
- /* Switch back to interrupt mode. */
- ucb1400_ts_mode_int(ucb);
- ucb1400_ts_irq_enable(ucb);
- }
-
- return IRQ_HANDLED;
-}
-
-static void ucb1400_ts_stop(struct ucb1400_ts *ucb)
-{
- /* Signal IRQ thread to stop polling and disable the handler. */
- ucb->stopped = true;
- mb();
- wake_up(&ucb->ts_wait);
- disable_irq(ucb->irq);
-
- ucb1400_ts_irq_disable(ucb);
- ucb1400_reg_write(ucb->ac97, UCB_TS_CR, 0);
-}
-
-/* Must be called with ts->lock held */
-static void ucb1400_ts_start(struct ucb1400_ts *ucb)
-{
- /* Tell IRQ thread that it may poll the device. */
- ucb->stopped = false;
- mb();
-
- ucb1400_ts_mode_int(ucb);
- ucb1400_ts_irq_enable(ucb);
-
- enable_irq(ucb->irq);
-}
-
-static int ucb1400_ts_open(struct input_dev *idev)
-{
- struct ucb1400_ts *ucb = input_get_drvdata(idev);
-
- ucb1400_ts_start(ucb);
-
- return 0;
-}
-
-static void ucb1400_ts_close(struct input_dev *idev)
-{
- struct ucb1400_ts *ucb = input_get_drvdata(idev);
-
- ucb1400_ts_stop(ucb);
-}
-
-#ifndef NO_IRQ
-#define NO_IRQ 0
-#endif
-
-/*
- * Try to probe our interrupt, rather than relying on lots of
- * hard-coded machine dependencies.
- */
-static int ucb1400_ts_detect_irq(struct ucb1400_ts *ucb,
- struct platform_device *pdev)
-{
- unsigned long mask, timeout;
-
- mask = probe_irq_on();
-
- /* Enable the ADC interrupt. */
- ucb1400_reg_write(ucb->ac97, UCB_IE_RIS, UCB_IE_ADC);
- ucb1400_reg_write(ucb->ac97, UCB_IE_FAL, UCB_IE_ADC);
- ucb1400_reg_write(ucb->ac97, UCB_IE_CLEAR, 0xffff);
- ucb1400_reg_write(ucb->ac97, UCB_IE_CLEAR, 0);
-
- /* Cause an ADC interrupt. */
- ucb1400_reg_write(ucb->ac97, UCB_ADC_CR, UCB_ADC_ENA);
- ucb1400_reg_write(ucb->ac97, UCB_ADC_CR, UCB_ADC_ENA | UCB_ADC_START);
-
- /* Wait for the conversion to complete. */
- timeout = jiffies + HZ/2;
- while (!(ucb1400_reg_read(ucb->ac97, UCB_ADC_DATA) &
- UCB_ADC_DAT_VALID)) {
- cpu_relax();
- if (time_after(jiffies, timeout)) {
- dev_err(&pdev->dev, "timed out in IRQ probe\n");
- probe_irq_off(mask);
- return -ENODEV;
- }
- }
- ucb1400_reg_write(ucb->ac97, UCB_ADC_CR, 0);
-
- /* Disable and clear interrupt. */
- ucb1400_reg_write(ucb->ac97, UCB_IE_RIS, 0);
- ucb1400_reg_write(ucb->ac97, UCB_IE_FAL, 0);
- ucb1400_reg_write(ucb->ac97, UCB_IE_CLEAR, 0xffff);
- ucb1400_reg_write(ucb->ac97, UCB_IE_CLEAR, 0);
-
- /* Read triggered interrupt. */
- ucb->irq = probe_irq_off(mask);
- if (ucb->irq < 0 || ucb->irq == NO_IRQ)
- return -ENODEV;
-
- return 0;
-}
-
-static int ucb1400_ts_probe(struct platform_device *pdev)
-{
- struct ucb1400_ts *ucb = dev_get_platdata(&pdev->dev);
- int error, x_res, y_res;
- u16 fcsr;
-
- ucb->ts_idev = input_allocate_device();
- if (!ucb->ts_idev) {
- error = -ENOMEM;
- goto err;
- }
-
- /* Only in case the IRQ line wasn't supplied, try detecting it */
- if (ucb->irq < 0) {
- error = ucb1400_ts_detect_irq(ucb, pdev);
- if (error) {
- dev_err(&pdev->dev, "IRQ probe failed\n");
- goto err_free_devs;
- }
- }
- dev_dbg(&pdev->dev, "found IRQ %d\n", ucb->irq);
-
- init_waitqueue_head(&ucb->ts_wait);
-
- input_set_drvdata(ucb->ts_idev, ucb);
-
- ucb->ts_idev->dev.parent = &pdev->dev;
- ucb->ts_idev->name = "UCB1400 touchscreen interface";
- ucb->ts_idev->id.vendor = ucb1400_reg_read(ucb->ac97,
- AC97_VENDOR_ID1);
- ucb->ts_idev->id.product = ucb->id;
- ucb->ts_idev->open = ucb1400_ts_open;
- ucb->ts_idev->close = ucb1400_ts_close;
- ucb->ts_idev->evbit[0] = BIT_MASK(EV_ABS) | BIT_MASK(EV_KEY);
- ucb->ts_idev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
-
- /*
- * Enable ADC filter to prevent horrible jitter on Colibri.
- * This also further reduces jitter on boards where ADCSYNC
- * pin is connected.
- */
- fcsr = ucb1400_reg_read(ucb->ac97, UCB_FCSR);
- ucb1400_reg_write(ucb->ac97, UCB_FCSR, fcsr | UCB_FCSR_AVE);
-
- ucb1400_adc_enable(ucb->ac97);
- x_res = ucb1400_ts_read_xres(ucb);
- y_res = ucb1400_ts_read_yres(ucb);
- ucb1400_adc_disable(ucb->ac97);
- dev_dbg(&pdev->dev, "x/y = %d/%d\n", x_res, y_res);
-
- input_set_abs_params(ucb->ts_idev, ABS_X, 0, x_res, 0, 0);
- input_set_abs_params(ucb->ts_idev, ABS_Y, 0, y_res, 0, 0);
- input_set_abs_params(ucb->ts_idev, ABS_PRESSURE, 0, 0, 0, 0);
-
- ucb1400_ts_stop(ucb);
-
- error = request_threaded_irq(ucb->irq, NULL, ucb1400_irq,
- IRQF_TRIGGER_RISING | IRQF_ONESHOT,
- "UCB1400", ucb);
- if (error) {
- dev_err(&pdev->dev,
- "unable to grab irq%d: %d\n", ucb->irq, error);
- goto err_free_devs;
- }
-
- error = input_register_device(ucb->ts_idev);
- if (error)
- goto err_free_irq;
-
- return 0;
-
-err_free_irq:
- free_irq(ucb->irq, ucb);
-err_free_devs:
- input_free_device(ucb->ts_idev);
-err:
- return error;
-}
-
-static int ucb1400_ts_remove(struct platform_device *pdev)
-{
- struct ucb1400_ts *ucb = dev_get_platdata(&pdev->dev);
-
- free_irq(ucb->irq, ucb);
- input_unregister_device(ucb->ts_idev);
-
- return 0;
-}
-
-static int __maybe_unused ucb1400_ts_suspend(struct device *dev)
-{
- struct ucb1400_ts *ucb = dev_get_platdata(dev);
- struct input_dev *idev = ucb->ts_idev;
-
- mutex_lock(&idev->mutex);
-
- if (input_device_enabled(idev))
- ucb1400_ts_stop(ucb);
-
- mutex_unlock(&idev->mutex);
- return 0;
-}
-
-static int __maybe_unused ucb1400_ts_resume(struct device *dev)
-{
- struct ucb1400_ts *ucb = dev_get_platdata(dev);
- struct input_dev *idev = ucb->ts_idev;
-
- mutex_lock(&idev->mutex);
-
- if (input_device_enabled(idev))
- ucb1400_ts_start(ucb);
-
- mutex_unlock(&idev->mutex);
- return 0;
-}
-
-static SIMPLE_DEV_PM_OPS(ucb1400_ts_pm_ops,
- ucb1400_ts_suspend, ucb1400_ts_resume);
-
-static struct platform_driver ucb1400_ts_driver = {
- .probe = ucb1400_ts_probe,
- .remove = ucb1400_ts_remove,
- .driver = {
- .name = "ucb1400_ts",
- .pm = &ucb1400_ts_pm_ops,
- },
-};
-module_platform_driver(ucb1400_ts_driver);
-
-module_param(adcsync, bool, 0444);
-MODULE_PARM_DESC(adcsync, "Synchronize touch readings with ADCSYNC pin.");
-
-module_param(ts_delay, int, 0444);
-MODULE_PARM_DESC(ts_delay, "Delay between panel setup and"
- " position read. Default = 55us.");
-
-module_param(ts_delay_pressure, int, 0444);
-MODULE_PARM_DESC(ts_delay_pressure,
- "delay between panel setup and pressure read."
- " Default = 0us.");
-
-MODULE_DESCRIPTION("Philips UCB1400 touchscreen driver");
-MODULE_LICENSE("GPL");