From d231cea1dca0c1b04d11cbf996077cf59612e3c4 Mon Sep 17 00:00:00 2001 From: Lars-Peter Clausen <lars@metafoo.de> Date: Sun, 5 Sep 2010 20:45:08 +0200 Subject: [PATCH 14/23] input: Add touchscreen driver for the JZ4740 SoC This patch adds a touchscreen driver for the Ingenic JZ4740 SoC. The touchscreen controller is part of the ADC unit and thus this driver is a mfd cell from the jz4740-adc driver. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> --- drivers/input/touchscreen/Kconfig | 12 ++ drivers/input/touchscreen/Makefile | 1 + drivers/input/touchscreen/jz4740-ts.c | 330 +++++++++++++++++++++++++++++++++ 3 files changed, 343 insertions(+), 0 deletions(-) create mode 100644 drivers/input/touchscreen/jz4740-ts.c --- a/drivers/input/touchscreen/Kconfig +++ b/drivers/input/touchscreen/Kconfig @@ -681,4 +681,16 @@ config TOUCHSCREEN_STMPE To compile this driver as a module, choose M here: the module will be called stmpe-ts. +config TOUCHSCREEN_JZ4740 + tristate "JZ4740 touchscreen support" + depends on MFD_JZ4740_ADC + help + Say Y here if you want support for the touchscreen controller found on + Ingenic JZ4740 SoCs. + + If unsure, say N. + + To compile this driver as a module, choose M here: the + module will be called jz4740-ts. + endif --- a/drivers/input/touchscreen/Makefile +++ b/drivers/input/touchscreen/Makefile @@ -26,6 +26,7 @@ obj-$(CONFIG_TOUCHSCREEN_FUJITSU) += fuj obj-$(CONFIG_TOUCHSCREEN_INEXIO) += inexio.o obj-$(CONFIG_TOUCHSCREEN_INTEL_MID) += intel-mid-touch.o obj-$(CONFIG_TOUCHSCREEN_LPC32XX) += lpc32xx_ts.o +obj-$(CONFIG_TOUCHSCREEN_JZ4740) += jz4740-ts.o obj-$(CONFIG_TOUCHSCREEN_MC13783) += mc13783_ts.o obj-$(CONFIG_TOUCHSCREEN_MCS5000) += mcs5000_ts.o obj-$(CONFIG_TOUCHSCREEN_MIGOR) += migor_ts.o --- /dev/null +++ b/drivers/input/touchscreen/jz4740-ts.c @@ -0,0 +1,330 @@ +/* + * Touchscreen driver for Ingenic JZ SoCs. + * + * Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de> + * + * 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/interrupt.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/slab.h> + +#include <linux/delay.h> +#include <linux/mfd/core.h> +#include <linux/input.h> +#include <linux/bitops.h> +#include <linux/jz4740-adc.h> + +struct jz4740_ts { + struct platform_device *pdev; + + struct resource *mem; + void __iomem *base; + + int irq_penup; + int irq_pendown; + int irq_data_ready; + + struct mfd_cell *cell; + struct input_dev *input; + + bool is_open; +}; + +static irqreturn_t jz4740_ts_data_ready_irq_handler(int irq, void *devid) +{ + struct jz4740_ts *jz4740_ts = devid; + uint32_t data; + unsigned long x, y, z1, z2, pressure; + + data = readl(jz4740_ts->base + 0x08); + x = data & 0xfff; + y = (data >> 16) & 0xfff; + + data = readl(jz4740_ts->base + 0x08); + z1 = data & 0xfff; + z2 = (data >> 16) & 0xfff; + if (z1 == 0) { + pressure = 4095UL; + } else if (z1 > z2) { + pressure = 0; + } else { + if (data & 0x8000) + pressure = (((480UL * x * z2) / z1) - 480UL * x) / 4096UL; + else + pressure = (((272UL * y * z2) / z1) - 272UL * y) / 4096UL; + if (pressure >= 4096UL) + pressure = 4095UL; + pressure = 4095UL - pressure; + } + + input_report_abs(jz4740_ts->input, ABS_X, y); + input_report_abs(jz4740_ts->input, ABS_Y, 4095 - x); + input_report_abs(jz4740_ts->input, ABS_PRESSURE, pressure); + input_report_key(jz4740_ts->input, BTN_TOUCH, 1); + input_sync(jz4740_ts->input); + + return IRQ_HANDLED; +} + +static irqreturn_t jz4740_ts_pen_irq_handler(int irq, void *devid) +{ + struct jz4740_ts *jz4740_ts = devid; + int is_pressed; + + if (irq == jz4740_ts->irq_penup) { + enable_irq(jz4740_ts->irq_pendown); + is_pressed = 0; + } else { + enable_irq(jz4740_ts->irq_penup); + is_pressed = 1; + } + disable_irq_nosync(irq); + + printk("pen irq: %d\n", irq); + input_report_key(jz4740_ts->input, BTN_TOUCH, is_pressed); + if (is_pressed == 0) + input_report_abs(jz4740_ts->input, ABS_PRESSURE, 0); + input_sync(jz4740_ts->input); + + return IRQ_HANDLED; +} + +static int jz4740_ts_open(struct input_dev *input) +{ + struct jz4740_ts *jz4740_ts = input_get_drvdata(input); + + jz4740_ts->is_open = true; + jz4740_ts->cell->enable(jz4740_ts->pdev); + + return 0; +} + +static void jz4740_ts_close(struct input_dev *input) +{ + struct jz4740_ts *jz4740_ts = input_get_drvdata(input); + + jz4740_ts->cell->disable(jz4740_ts->pdev); + jz4740_ts->is_open = false; +} + +static int __devinit jz4740_ts_probe(struct platform_device *pdev) +{ + int ret = 0; + struct jz4740_ts *jz4740_ts; + struct input_dev *input; + + jz4740_ts = kzalloc(sizeof(*jz4740_ts), GFP_KERNEL); + if (!jz4740_ts) { + dev_err(&pdev->dev, "Failed to allocate driver structure\n"); + return -ENOMEM; + } + + jz4740_ts->pdev = pdev; + jz4740_ts->cell = pdev->dev.platform_data; + + jz4740_ts->irq_data_ready = platform_get_irq(pdev, 0); + if (jz4740_ts->irq_data_ready < 0) { + ret = jz4740_ts->irq_data_ready; + dev_err(&pdev->dev, "Failed to get platform irq: %d\n", ret); + goto err_free; + } + + jz4740_ts->irq_penup = platform_get_irq(pdev, 1); + if (jz4740_ts->irq_penup < 0) { + ret = jz4740_ts->irq_penup; + dev_err(&pdev->dev, "Failed to get platform irq: %d\n", ret); + goto err_free; + } + + jz4740_ts->irq_pendown = platform_get_irq(pdev, 2); + if (jz4740_ts->irq_pendown < 0) { + ret = jz4740_ts->irq_pendown; + dev_err(&pdev->dev, "Failed to get platform irq: %d\n", ret); + goto err_free; + } + + jz4740_ts->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!jz4740_ts->mem) { + ret = -ENOENT; + dev_err(&pdev->dev, "Failed to get platform mmio resource\n"); + goto err_free; + } + + jz4740_ts->mem = request_mem_region(jz4740_ts->mem->start, + resource_size(jz4740_ts->mem), pdev->name); + if (!jz4740_ts->mem) { + ret = -EBUSY; + dev_err(&pdev->dev, "Failed to request mmio memory region\n"); + goto err_free; + } + + jz4740_ts->base = ioremap_nocache(jz4740_ts->mem->start, + resource_size(jz4740_ts->mem)); + if (!jz4740_ts->base) { + ret = -EBUSY; + dev_err(&pdev->dev, "Failed to ioremap mmio memory\n"); + goto err_release_mem_region; + } + + input = input_allocate_device(); + if (!input) { + dev_err(&pdev->dev, "Failed to allocate input device\n"); + ret = -ENOMEM; + goto err_iounmap; + } + + input->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); + __set_bit(BTN_TOUCH, input->keybit); + + input_set_abs_params(input, ABS_X, 150, 3920, 0, 0); + input_set_abs_params(input, ABS_Y, 270, 3700, 0, 0); + input_set_abs_params(input, ABS_PRESSURE, 0, 4096, 0, 0); + + input->name = pdev->name; + input->phys = "jz4740"; + input->id.bustype = BUS_HOST; + input->dev.parent = &pdev->dev; + + input->open = jz4740_ts_open; + input->close = jz4740_ts_close; + + input_set_drvdata(input, jz4740_ts); + + ret = input_register_device(input); + if (ret) { + dev_err(&pdev->dev, "Failed to register input device: %d\n", ret); + input_free_device(input); + goto err_iounmap; + } + jz4740_ts->input = input; + + ret = request_irq(jz4740_ts->irq_data_ready, jz4740_ts_data_ready_irq_handler, 0, pdev->name, + jz4740_ts); + if (ret) { + dev_err(&pdev->dev, "Failed to request irq %d\n", ret); + goto err_input_unregister_device; + } + ret = request_irq(jz4740_ts->irq_penup, jz4740_ts_pen_irq_handler, 0, pdev->name, + jz4740_ts); + if (ret) { + dev_err(&pdev->dev, "Failed to request irq %d\n", ret); + goto err_free_irq_data_ready; + } + disable_irq(jz4740_ts->irq_penup); + ret = request_irq(jz4740_ts->irq_pendown, jz4740_ts_pen_irq_handler, 0, pdev->name, + jz4740_ts); + if (ret) { + dev_err(&pdev->dev, "Failed to request irq %d\n", ret); + goto err_free_irq_penup; + } + platform_set_drvdata(pdev, jz4740_ts); + + jz4740_adc_set_config(pdev->dev.parent, + JZ_ADC_CONFIG_EX_IN | JZ_ADC_CONFIG_XYZ_OFFSET(2) | JZ_ADC_CONFIG_DNUM(7), + JZ_ADC_CONFIG_EX_IN | JZ_ADC_CONFIG_XYZ_MASK | JZ_ADC_CONFIG_DNUM_MASK); + + + writel(0x15e, jz4740_ts->base); + writel(0x32, jz4740_ts->base + 0x04); + + return 0; + +err_free_irq_penup: + free_irq(jz4740_ts->irq_penup, jz4740_ts); +err_free_irq_data_ready: + free_irq(jz4740_ts->irq_data_ready, jz4740_ts); +err_input_unregister_device: + input_unregister_device(jz4740_ts->input); +err_iounmap: + platform_set_drvdata(pdev, NULL); + iounmap(jz4740_ts->base); +err_release_mem_region: + release_mem_region(jz4740_ts->mem->start, resource_size(jz4740_ts->mem)); +err_free: + kfree(jz4740_ts); + return ret; +} + +static int __devexit jz4740_ts_remove(struct platform_device *pdev) +{ + struct jz4740_ts *jz4740_ts = platform_get_drvdata(pdev); + + + free_irq(jz4740_ts->irq_pendown, jz4740_ts); + free_irq(jz4740_ts->irq_penup, jz4740_ts); + free_irq(jz4740_ts->irq_data_ready, jz4740_ts); + + input_unregister_device(jz4740_ts->input); + + iounmap(jz4740_ts->base); + release_mem_region(jz4740_ts->mem->start, resource_size(jz4740_ts->mem)); + + kfree(jz4740_ts); + + return 0; +} + +#ifdef CONFIG_PM +static int jz4740_ts_suspend(struct device *dev) +{ + struct jz4740_ts *jz4740_ts = dev_get_drvdata(dev); + + if (jz4740_ts->is_open); + jz4740_ts->cell->disable(jz4740_ts->pdev); + + return 0; +} + +static int jz4740_ts_resume(struct device *dev) +{ + struct jz4740_ts *jz4740_ts = dev_get_drvdata(dev); + + if (jz4740_ts->is_open); + jz4740_ts->cell->enable(jz4740_ts->pdev); + + return 0; +} + +static const struct dev_pm_ops jz4740_ts_pm_ops = { + .suspend = jz4740_ts_suspend, + .resume = jz4740_ts_resume, +}; + +#define JZ4740_TS_PM_OPS (&jz4740_ts_pm_ops) +#else +#define JZ4740_TS_PM_OPS NULL +#endif + +static struct platform_driver jz4740_ts_driver = { + .probe = jz4740_ts_probe, + .remove = __devexit_p(jz4740_ts_remove), + .driver = { + .name = "jz4740-ts", + .owner = THIS_MODULE, + .pm = JZ4740_TS_PM_OPS, + }, +}; + +static int __init jz4740_ts_init(void) +{ + return platform_driver_register(&jz4740_ts_driver); +} +module_init(jz4740_ts_init); + +static void __exit jz4740_ts_exit(void) +{ + platform_driver_unregister(&jz4740_ts_driver); +} +module_exit(jz4740_ts_exit); + +MODULE_ALIAS("platform:jz4740-ts"); +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>"); +MODULE_DESCRIPTION("JZ4740 SoC battery driver");