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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");
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