target/linux/goldfish/patches-2.6.30/0123--ARM-goldfish-events-Add-event-driver-for-goldfis.patch

   1 From 226fd290dc2d052e5cd437cc8464e1424e7ebf2c Mon Sep 17 00:00:00 2001
   2 From: Brian Swetland <swetland@google.com>
   3 Date: Sun, 13 Aug 2006 21:50:14 +0700
   4 Subject: [PATCH 123/134] [ARM] goldfish: events: Add event driver for goldfish
   5
   6 this device is a direct pipe from "hardware" to the input
   7 event subsystem, allowing us to avoid having to route
   8 "keypad" style events through an AT keyboard driver (gross!)
   9
  10 Signed-off-by: Mike A. Chan <mikechan@google.com>
  11 ---
  12  drivers/input/keyboard/Kconfig           |    5 +
  13  drivers/input/keyboard/Makefile          |    1 +
  14  drivers/input/keyboard/goldfish_events.c |  190 ++++++++++++++++++++++++++++++
  15  3 files changed, 196 insertions(+), 0 deletions(-)
  16  create mode 100644 drivers/input/keyboard/goldfish_events.c
  17
  18 --- a/drivers/input/keyboard/Kconfig
  19 +++ b/drivers/input/keyboard/Kconfig
  20 @@ -304,6 +304,11 @@ config KEYBOARD_GPIO
  21           To compile this driver as a module, choose M here: the
  22           module will be called gpio-keys.
  23
  24 +config KEYBOARD_GOLDFISH_EVENTS
  25 +       tristate "Generic Input Event device for Goldfish"
  26 +       help
  27 +         no help
  28 +
  29  config KEYBOARD_MAPLE
  30         tristate "Maple bus keyboard"
  31         depends on SH_DREAMCAST && MAPLE
  32 --- a/drivers/input/keyboard/Makefile
  33 +++ b/drivers/input/keyboard/Makefile
  34 @@ -23,6 +23,7 @@ obj-$(CONFIG_KEYBOARD_PXA27x)         += pxa27x
  35  obj-$(CONFIG_KEYBOARD_PXA930_ROTARY)   += pxa930_rotary.o
  36  obj-$(CONFIG_KEYBOARD_AAED2000)                += aaed2000_kbd.o
  37  obj-$(CONFIG_KEYBOARD_GPIO)            += gpio_keys.o
  38 +obj-$(CONFIG_KEYBOARD_GOLDFISH_EVENTS) += goldfish_events.o
  39  obj-$(CONFIG_KEYBOARD_HP6XX)           += jornada680_kbd.o
  40  obj-$(CONFIG_KEYBOARD_HP7XX)           += jornada720_kbd.o
  41  obj-$(CONFIG_KEYBOARD_MAPLE)           += maple_keyb.o
  42 --- /dev/null
  43 +++ b/drivers/input/keyboard/goldfish_events.c
  44 @@ -0,0 +1,190 @@
  45 +/* drivers/input/keyboard/goldfish-events.c
  46 +**
  47 +** Copyright (C) 2007 Google, Inc.
  48 +**
  49 +** This software is licensed under the terms of the GNU General Public
  50 +** License version 2, as published by the Free Software Foundation, and
  51 +** may be copied, distributed, and modified under those terms.
  52 +**
  53 +** This program is distributed in the hope that it will be useful,
  54 +** but WITHOUT ANY WARRANTY; without even the implied warranty of
  55 +** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  56 +** GNU General Public License for more details.
  57 +**
  58 +*/
  59 +
  60 +#include <linux/module.h>
  61 +#include <linux/init.h>
  62 +#include <linux/interrupt.h>
  63 +#include <linux/types.h>
  64 +#include <linux/input.h>
  65 +#include <linux/kernel.h>
  66 +#include <linux/platform_device.h>
  67 +
  68 +#include <mach/hardware.h>
  69 +#include <asm/irq.h>
  70 +#include <asm/io.h>
  71 +
  72 +enum {
  73 +       REG_READ        = 0x00,
  74 +       REG_SET_PAGE    = 0x00,
  75 +       REG_LEN         = 0x04,
  76 +       REG_DATA        = 0x08,
  77 +
  78 +       PAGE_NAME       = 0x00000,
  79 +       PAGE_EVBITS     = 0x10000,
  80 +       PAGE_ABSDATA    = 0x20000 | EV_ABS,
  81 +};
  82 +
  83 +struct event_dev {
  84 +    struct input_dev *input;
  85 +    int irq;
  86 +    unsigned addr;
  87 +    char name[0];
  88 +};
  89 +
  90 +static irqreturn_t events_interrupt(int irq, void *dev_id)
  91 +{
  92 +    struct event_dev *edev = dev_id;
  93 +    unsigned type, code, value;
  94 +
  95 +    type = __raw_readl(edev->addr + REG_READ);
  96 +    code = __raw_readl(edev->addr + REG_READ);
  97 +    value = __raw_readl(edev->addr + REG_READ);
  98 +
  99 +    input_event(edev->input, type, code, value);
 100 +    return IRQ_HANDLED;
 101 +}
 102 +
 103 +static void events_import_bits(struct event_dev *edev, unsigned long bits[], unsigned type, size_t count)
 104 +{
 105 +       int i, j;
 106 +       size_t size;
 107 +       uint8_t val;
 108 +       unsigned addr = edev->addr;
 109 +       __raw_writel(PAGE_EVBITS | type, addr + REG_SET_PAGE);
 110 +       size = __raw_readl(addr + REG_LEN) * 8;
 111 +       if (size < count)
 112 +               count = size;
 113 +       addr = addr + REG_DATA;
 114 +       for (i = 0; i < count; i += 8) {
 115 +               val = __raw_readb(addr++);
 116 +               for (j = 0; j < 8; j++)
 117 +                       if(val & 1 << j)
 118 +                               set_bit(i + j, bits);
 119 +       }
 120 +}
 121 +
 122 +static int events_probe(struct platform_device *pdev)
 123 +{
 124 +    struct input_dev *input_dev;
 125 +    struct event_dev *edev = NULL;
 126 +    struct resource *res;
 127 +    unsigned keymapnamelen;
 128 +    int i;
 129 +    int count;
 130 +    int irq;
 131 +    unsigned addr;
 132 +    int ret;
 133 +
 134 +    printk("*** events probe ***\n");
 135 +
 136 +    input_dev = input_allocate_device();
 137 +    res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 138 +    if(!input_dev || !res) goto fail;
 139 +
 140 +    addr = (unsigned) ioremap(res->start, 4096);
 141 +    irq = platform_get_irq(pdev, 0);
 142 +
 143 +    printk("events_probe() addr=0x%08x irq=%d\n", addr, irq);
 144 +
 145 +    if(!addr) goto fail;
 146 +    if(irq < 0) goto fail;
 147 +
 148 +    __raw_writel(PAGE_NAME, addr + REG_SET_PAGE);
 149 +    keymapnamelen = __raw_readl(addr + REG_LEN);
 150 +
 151 +    edev = kzalloc(sizeof(struct event_dev) + keymapnamelen + 1, GFP_KERNEL);
 152 +    if (!edev) goto fail;
 153 +
 154 +    edev->input = input_dev;
 155 +    edev->addr = addr;
 156 +    edev->irq = irq;
 157 +
 158 +    for (i = 0; i < keymapnamelen; i++) {
 159 +        edev->name[i] = __raw_readb(edev->addr + REG_DATA + i);
 160 +    }
 161 +    printk("events_probe() keymap=%s\n", edev->name);
 162 +
 163 +    events_import_bits(edev, input_dev->evbit, EV_SYN, EV_MAX);
 164 +    events_import_bits(edev, input_dev->keybit, EV_KEY, KEY_MAX);
 165 +    events_import_bits(edev, input_dev->relbit, EV_REL, REL_MAX);
 166 +    events_import_bits(edev, input_dev->absbit, EV_ABS, ABS_MAX);
 167 +    events_import_bits(edev, input_dev->mscbit, EV_MSC, MSC_MAX);
 168 +    events_import_bits(edev, input_dev->ledbit, EV_LED, LED_MAX);
 169 +    events_import_bits(edev, input_dev->sndbit, EV_SND, SND_MAX);
 170 +    events_import_bits(edev, input_dev->ffbit, EV_FF, FF_MAX);
 171 +    events_import_bits(edev, input_dev->swbit, EV_SW, SW_MAX);
 172 +
 173 +    __raw_writel(PAGE_ABSDATA, addr + REG_SET_PAGE);
 174 +    count = __raw_readl(addr + REG_LEN) / (4 * 4);
 175 +    if (count > ABS_MAX)
 176 +        count = ABS_MAX;
 177 +    for(i = 0; i < count; i++) {
 178 +        int val[4];
 179 +        int j;
 180 +        if (!test_bit(i, input_dev->absbit))
 181 +            continue;
 182 +        for(j = 0; j < ARRAY_SIZE(val); j++)
 183 +            val[j] = __raw_readl(edev->addr + REG_DATA + (i * ARRAY_SIZE(val) + j) * 4);
 184 +        input_set_abs_params(input_dev, i, val[0], val[1], val[2], val[3]);
 185 +    }
 186 +
 187 +    platform_set_drvdata(pdev, edev);
 188 +
 189 +    input_dev->name = edev->name;
 190 +    input_set_drvdata(input_dev, edev);
 191 +
 192 +    ret = input_register_device(input_dev);
 193 +    if (ret)
 194 +        goto fail;
 195 +
 196 +    if(request_irq(edev->irq, events_interrupt, 0,
 197 +                   "goldfish-events-keypad", edev) < 0) {
 198 +        input_unregister_device(input_dev);
 199 +        kfree(edev);
 200 +        return -EINVAL;
 201 +    }
 202 +
 203 +    return 0;
 204 +
 205 +fail:
 206 +    kfree(edev);
 207 +    input_free_device(input_dev);
 208 +
 209 +    return -EINVAL;
 210 +}
 211 +
 212 +static struct platform_driver events_driver = {
 213 +    .probe = events_probe,
 214 +    .driver = {
 215 +        .name = "goldfish_events",
 216 +    },
 217 +};
 218 +
 219 +static int __devinit events_init(void)
 220 +{
 221 +    return platform_driver_register(&events_driver);
 222 +}
 223 +
 224 +
 225 +static void __exit events_exit(void)
 226 +{
 227 +}
 228 +
 229 +module_init(events_init);
 230 +module_exit(events_exit);
 231 +
 232 +MODULE_AUTHOR("Brian Swetland");
 233 +MODULE_DESCRIPTION("Goldfish Event Device");
 234 +MODULE_LICENSE("GPL");