From 226fd290dc2d052e5cd437cc8464e1424e7ebf2c Mon Sep 17 00:00:00 2001 From: Brian Swetland <swetland@google.com> Date: Sun, 13 Aug 2006 21:50:14 +0700 Subject: [PATCH 123/134] [ARM] goldfish: events: Add event driver for goldfish this device is a direct pipe from "hardware" to the input event subsystem, allowing us to avoid having to route "keypad" style events through an AT keyboard driver (gross!) Signed-off-by: Mike A. Chan <mikechan@google.com> --- drivers/input/keyboard/Kconfig | 5 + drivers/input/keyboard/Makefile | 1 + drivers/input/keyboard/goldfish_events.c | 190 ++++++++++++++++++++++++++++++ 3 files changed, 196 insertions(+), 0 deletions(-) create mode 100644 drivers/input/keyboard/goldfish_events.c --- a/drivers/input/keyboard/Kconfig +++ b/drivers/input/keyboard/Kconfig @@ -304,6 +304,11 @@ config KEYBOARD_GPIO To compile this driver as a module, choose M here: the module will be called gpio-keys. +config KEYBOARD_GOLDFISH_EVENTS + tristate "Generic Input Event device for Goldfish" + help + no help + config KEYBOARD_MAPLE tristate "Maple bus keyboard" depends on SH_DREAMCAST && MAPLE --- a/drivers/input/keyboard/Makefile +++ b/drivers/input/keyboard/Makefile @@ -23,6 +23,7 @@ obj-$(CONFIG_KEYBOARD_PXA27x) += pxa27x obj-$(CONFIG_KEYBOARD_PXA930_ROTARY) += pxa930_rotary.o obj-$(CONFIG_KEYBOARD_AAED2000) += aaed2000_kbd.o obj-$(CONFIG_KEYBOARD_GPIO) += gpio_keys.o +obj-$(CONFIG_KEYBOARD_GOLDFISH_EVENTS) += goldfish_events.o obj-$(CONFIG_KEYBOARD_HP6XX) += jornada680_kbd.o obj-$(CONFIG_KEYBOARD_HP7XX) += jornada720_kbd.o obj-$(CONFIG_KEYBOARD_MAPLE) += maple_keyb.o --- /dev/null +++ b/drivers/input/keyboard/goldfish_events.c @@ -0,0 +1,190 @@ +/* drivers/input/keyboard/goldfish-events.c +** +** Copyright (C) 2007 Google, Inc. +** +** This software is licensed under the terms of the GNU General Public +** License version 2, as published by the Free Software Foundation, and +** may be copied, distributed, and modified under those terms. +** +** This program is distributed in the hope that it will be useful, +** but WITHOUT ANY WARRANTY; 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/init.h> +#include <linux/interrupt.h> +#include <linux/types.h> +#include <linux/input.h> +#include <linux/kernel.h> +#include <linux/platform_device.h> + +#include <mach/hardware.h> +#include <asm/irq.h> +#include <asm/io.h> + +enum { + REG_READ = 0x00, + REG_SET_PAGE = 0x00, + REG_LEN = 0x04, + REG_DATA = 0x08, + + PAGE_NAME = 0x00000, + PAGE_EVBITS = 0x10000, + PAGE_ABSDATA = 0x20000 | EV_ABS, +}; + +struct event_dev { + struct input_dev *input; + int irq; + unsigned addr; + char name[0]; +}; + +static irqreturn_t events_interrupt(int irq, void *dev_id) +{ + struct event_dev *edev = dev_id; + unsigned type, code, value; + + type = __raw_readl(edev->addr + REG_READ); + code = __raw_readl(edev->addr + REG_READ); + value = __raw_readl(edev->addr + REG_READ); + + input_event(edev->input, type, code, value); + return IRQ_HANDLED; +} + +static void events_import_bits(struct event_dev *edev, unsigned long bits[], unsigned type, size_t count) +{ + int i, j; + size_t size; + uint8_t val; + unsigned addr = edev->addr; + __raw_writel(PAGE_EVBITS | type, addr + REG_SET_PAGE); + size = __raw_readl(addr + REG_LEN) * 8; + if (size < count) + count = size; + addr = addr + REG_DATA; + for (i = 0; i < count; i += 8) { + val = __raw_readb(addr++); + for (j = 0; j < 8; j++) + if(val & 1 << j) + set_bit(i + j, bits); + } +} + +static int events_probe(struct platform_device *pdev) +{ + struct input_dev *input_dev; + struct event_dev *edev = NULL; + struct resource *res; + unsigned keymapnamelen; + int i; + int count; + int irq; + unsigned addr; + int ret; + + printk("*** events probe ***\n"); + + input_dev = input_allocate_device(); + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if(!input_dev || !res) goto fail; + + addr = (unsigned) ioremap(res->start, 4096); + irq = platform_get_irq(pdev, 0); + + printk("events_probe() addr=0x%08x irq=%d\n", addr, irq); + + if(!addr) goto fail; + if(irq < 0) goto fail; + + __raw_writel(PAGE_NAME, addr + REG_SET_PAGE); + keymapnamelen = __raw_readl(addr + REG_LEN); + + edev = kzalloc(sizeof(struct event_dev) + keymapnamelen + 1, GFP_KERNEL); + if (!edev) goto fail; + + edev->input = input_dev; + edev->addr = addr; + edev->irq = irq; + + for (i = 0; i < keymapnamelen; i++) { + edev->name[i] = __raw_readb(edev->addr + REG_DATA + i); + } + printk("events_probe() keymap=%s\n", edev->name); + + events_import_bits(edev, input_dev->evbit, EV_SYN, EV_MAX); + events_import_bits(edev, input_dev->keybit, EV_KEY, KEY_MAX); + events_import_bits(edev, input_dev->relbit, EV_REL, REL_MAX); + events_import_bits(edev, input_dev->absbit, EV_ABS, ABS_MAX); + events_import_bits(edev, input_dev->mscbit, EV_MSC, MSC_MAX); + events_import_bits(edev, input_dev->ledbit, EV_LED, LED_MAX); + events_import_bits(edev, input_dev->sndbit, EV_SND, SND_MAX); + events_import_bits(edev, input_dev->ffbit, EV_FF, FF_MAX); + events_import_bits(edev, input_dev->swbit, EV_SW, SW_MAX); + + __raw_writel(PAGE_ABSDATA, addr + REG_SET_PAGE); + count = __raw_readl(addr + REG_LEN) / (4 * 4); + if (count > ABS_MAX) + count = ABS_MAX; + for(i = 0; i < count; i++) { + int val[4]; + int j; + if (!test_bit(i, input_dev->absbit)) + continue; + for(j = 0; j < ARRAY_SIZE(val); j++) + val[j] = __raw_readl(edev->addr + REG_DATA + (i * ARRAY_SIZE(val) + j) * 4); + input_set_abs_params(input_dev, i, val[0], val[1], val[2], val[3]); + } + + platform_set_drvdata(pdev, edev); + + input_dev->name = edev->name; + input_set_drvdata(input_dev, edev); + + ret = input_register_device(input_dev); + if (ret) + goto fail; + + if(request_irq(edev->irq, events_interrupt, 0, + "goldfish-events-keypad", edev) < 0) { + input_unregister_device(input_dev); + kfree(edev); + return -EINVAL; + } + + return 0; + +fail: + kfree(edev); + input_free_device(input_dev); + + return -EINVAL; +} + +static struct platform_driver events_driver = { + .probe = events_probe, + .driver = { + .name = "goldfish_events", + }, +}; + +static int __devinit events_init(void) +{ + return platform_driver_register(&events_driver); +} + + +static void __exit events_exit(void) +{ +} + +module_init(events_init); +module_exit(events_exit); + +MODULE_AUTHOR("Brian Swetland"); +MODULE_DESCRIPTION("Goldfish Event Device"); +MODULE_LICENSE("GPL");