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[PATCH] Add support for keyboard on SEGA Dreamcast
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From: Adrian M. <lkm...@gm...> - 2007-09-04 23:34:38
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This patch will add support for the Dreamcast keyboard when used alongside the maple bus patch (http://lkml.org/lkml/2007/9/4/165) and the pvr2 patch. Signed off by: Adrian McMenamin <ad...@mc...> diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig index c97d5eb..1689f73 100644 --- a/drivers/input/keyboard/Kconfig +++ b/drivers/input/keyboard/Kconfig @@ -253,4 +253,14 @@ config KEYBOARD_GPIO To compile this driver as a module, choose M here: the module will be called gpio-keys. + +config KEYBOARD_MAPLE + tristate "Maple bus keyboard" + depends on SH_DREAMCAST && MAPLE + help + Say Y here if you have a DreamCast console running Linux and have + a keyboard attached to its Maple bus. + + To compile this driver as a module, choose M here: the + module will be called maple_keyb. endif diff --git a/drivers/input/keyboard/Makefile b/drivers/input/keyboard/Makefile index 28d211b..3f775ed 100644 --- a/drivers/input/keyboard/Makefile +++ b/drivers/input/keyboard/Makefile @@ -21,4 +21,5 @@ obj-$(CONFIG_KEYBOARD_OMAP) += omap-keypad.o obj-$(CONFIG_KEYBOARD_PXA27x) += pxa27x_keyboard.o obj-$(CONFIG_KEYBOARD_AAED2000) += aaed2000_kbd.o obj-$(CONFIG_KEYBOARD_GPIO) += gpio_keys.o +obj-$(CONFIG_KEYBOARD_MAPLE) += maple_keyb.o diff --git a/drivers/input/keyboard/maple_keyb.c b/drivers/input/keyboard/maple_keyb.c new file mode 100644 index 0000000..12e4692 --- /dev/null +++ b/drivers/input/keyboard/maple_keyb.c @@ -0,0 +1,222 @@ +/* + * SEGA Dreamcast keyboard driver + * Based on drivers/usb/usbkbd.c + * Copyright YAEGASHI Takeshi, 2001 + * Porting to 2.6 Copyright Adrian McMenamin, 2007 + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see the file COPYING, or write + * to the Free Software Foundation, Inc., + * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA +*/ + +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/input.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/timer.h> +#include <linux/maple.h> + +MODULE_AUTHOR("YAEGASHI Takeshi, Adrian McMenamin"); +MODULE_DESCRIPTION("SEGA Dreamcast keyboard driver"); +MODULE_LICENSE("GPL"); + +static unsigned char dc_kbd_keycode[256] = { + 0, 0, 0, 0, 30, 48, 46, 32, + 18, 33, 34, 35, 23, 36, 37, 38, + 50, 49, 24, 25, 16, 19, 31, 20, + 22, 47, 17, 45, 21, 44, 2, 3, + 4, 5, 6, 7, 8, 9, 10, 11, 28, + 1, 14, 15, 57, 12, 13, 26, + 27, 43, 43, 39, 40, 41, 51, + 52, 53, 58, 59, 60, 61, 62, 63, 64, + 65, 66, 67, 68, 87, 88, 99, + 70, 119, 110, 102, 104, 111, + 107, 109, 106, 105, 108, 103, + 69, 98, 55, 74, 78, 96, 79, 80, + 81, 75, 76, 77, 71, 72, 73, 82, 83, + 86, 127, 116, 117, 183, 184, 185, + 186, 187, 188, 189, 190, + 191, 192, 193, 194, 134, 138, 130, 132, + 128, 129, 131, 137, 133, 135, 136, 113, + 115, 114, 0, 0, 0, 121, 0, 89, 93, 124, + 92, 94, 95, 0, 0, 0, + 122, 123, 90, 91, 85, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 29, 42, 56, 125, 97, 54, 100, 126, + 164, 166, 165, 163, 161, 115, 114, 113, + 150, 158, 159, 128, 136, 177, 178, 176, 142, + 152, 173, 140 +}; + +struct dc_kbd { + struct input_dev *dev; + unsigned char new[8]; + unsigned char old[8]; +}; + +static void dc_scan_kbd(struct dc_kbd *kbd) +{ + int i; + struct input_dev *dev = kbd->dev; + for (i = 0; i < 8; i++) + input_report_key(dev, + dc_kbd_keycode[i + 224], + (kbd->new[0] >> i) & 1); + + for (i = 2; i < 8; i++) { + if (kbd->old[i] > 3 + && memchr(kbd->new + 2, kbd->old[i], 6) == NULL) { + if (dc_kbd_keycode[kbd->old[i]]) + input_report_key(dev, + dc_kbd_keycode[kbd->old[i]], 0); + else + printk + ("Unknown key (scancode %#x) released.", + kbd->old[i]); + } + + if (kbd->new[i] > 3 + && memchr(kbd->old + 2, kbd->new[i], 6) != NULL) { + if (dc_kbd_keycode[kbd->new[i]]) + input_report_key(dev, + dc_kbd_keycode[kbd->new[i]], 1); + else + printk + ("Unknown key (scancode %#x) pressed.", + kbd->new[i]); + } + } + input_sync(dev); + memcpy(kbd->old, kbd->new, 8); +} + +static void dc_kbd_callback(struct mapleq *mq) +{ + struct maple_device *mapledev = mq->dev; + struct dc_kbd *kbd = mapledev->private_data; + unsigned long *buf = mq->recvbuf; + if (buf[1] == mapledev->function) { + memcpy(kbd->new, buf + 2, 8); + dc_scan_kbd(kbd); + } +} + +static int dc_kbd_connect(struct maple_device *dev) +{ + int i, retval; + unsigned long data = be32_to_cpu(dev->devinfo.function_data[0]); + struct dc_kbd *kbd; + if (dev->function != MAPLE_FUNC_KEYBOARD) + return -EINVAL; + + kbd = kzalloc(sizeof(struct dc_kbd), GFP_KERNEL); + if (unlikely(!kbd)) + return -ENOMEM; + + dev->private_data = kbd; + kbd->dev = input_allocate_device(); + if (unlikely(!kbd->dev)) + goto cleanup; + + kbd->dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REP); + + for (i = 0; i < 255; i++) + set_bit(dc_kbd_keycode[i], kbd->dev->keybit); + + clear_bit(0, kbd->dev->keybit); + + kbd->dev->private = kbd; + + kbd->dev->name = dev->product_name; + kbd->dev->id.bustype = BUS_MAPLE; + + retval = input_register_device(kbd->dev); + if (unlikely(retval)) + goto cleanup; + + maple_getcond_callback(dev, dc_kbd_callback, (25 * HZ) / 1000, + MAPLE_FUNC_KEYBOARD); + + printk(KERN_INFO "input: keyboard(0x%lx): %s\n", data, + kbd->dev->name); + + return 0; + + cleanup: + kfree(kbd); + return -EINVAL; +} + +static void dc_kbd_disconnect(struct maple_device *dev) +{ + struct dc_kbd *kbd = dev->private_data; + + input_unregister_device(kbd->dev); + kfree(kbd); +} + +/* allow the keyboard to be used */ +static int probe_maple_kbd(struct device *dev) +{ + struct maple_device *mdev; + struct maple_driver *mdrv; + int proberes; + + mdev = to_maple_dev(dev); + mdrv = to_maple_driver(dev->driver); + + proberes = dc_kbd_connect(mdev); + if (unlikely(proberes)) + return proberes; + mdev->driver = mdrv; + mdev->registered = 1; + return 0; +} + + +static struct maple_driver dc_kbd_driver = { + .function = MAPLE_FUNC_KEYBOARD, + .connect = dc_kbd_connect, + .disconnect = dc_kbd_disconnect, + .drv = { + .name = "Dreamcast_keyboard", + .probe = probe_maple_kbd, + }, +}; + +static int __init dc_kbd_init(void) +{ + int retval; + retval = maple_driver_register(&dc_kbd_driver.drv); + if (retval) + return retval; + return 0; +} + +static void __exit dc_kbd_exit(void) +{ + driver_unregister(&dc_kbd_driver.drv); +} + +module_init(dc_kbd_init); +module_exit(dc_kbd_exit); diff --git a/include/linux/input.h b/include/linux/input.h index e02c6a6..2e65c88 100644 --- a/include/linux/input.h +++ b/include/linux/input.h @@ -688,6 +688,7 @@ struct input_absinfo { #define BUS_HOST 0x19 #define BUS_GSC 0x1A #define BUS_ATARI 0x1B +#define BUS_MAPLE 0x1C /* * Values describing the status of a force-feedback effect |
