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