diff options
Diffstat (limited to 'drivers/hid/hid-icade.c')
| -rw-r--r-- | drivers/hid/hid-icade.c | 259 |
1 files changed, 259 insertions, 0 deletions
diff --git a/drivers/hid/hid-icade.c b/drivers/hid/hid-icade.c new file mode 100644 index 00000000000..1d6565e37ba --- /dev/null +++ b/drivers/hid/hid-icade.c @@ -0,0 +1,259 @@ +/* + * ION iCade input driver + * + * Copyright (c) 2012 Bastien Nocera <hadess@hadess.net> + * Copyright (c) 2012 Benjamin Tissoires <benjamin.tissoires@gmail.com> + */ + +/* + * 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. + */ + +#include <linux/device.h> +#include <linux/hid.h> +#include <linux/module.h> + +#include "hid-ids.h" + +/* + * ↑ A C Y L + * ← → + * ↓ B X Z R + * + * + * UP ON,OFF = w,e + * RT ON,OFF = d,c + * DN ON,OFF = x,z + * LT ON,OFF = a,q + * A ON,OFF = y,t + * B ON,OFF = h,r + * C ON,OFF = u,f + * X ON,OFF = j,n + * Y ON,OFF = i,m + * Z ON,OFF = k,p + * L ON,OFF = o,g + * R ON,OFF = l,v + */ + +/* The translation code uses HID usage instead of input layer + * keys. This code generates a lookup table that makes + * translation quick. + * + * #include <linux/input.h> + * #include <stdio.h> + * #include <assert.h> + * + * #define unk KEY_UNKNOWN + * + * < copy of hid_keyboard[] from hid-input.c > + * + * struct icade_key_translation { + * int from; + * const char *to; + * int press; + * }; + * + * static const struct icade_key_translation icade_keys[] = { + * { KEY_W, "KEY_UP", 1 }, + * { KEY_E, "KEY_UP", 0 }, + * { KEY_D, "KEY_RIGHT", 1 }, + * { KEY_C, "KEY_RIGHT", 0 }, + * { KEY_X, "KEY_DOWN", 1 }, + * { KEY_Z, "KEY_DOWN", 0 }, + * { KEY_A, "KEY_LEFT", 1 }, + * { KEY_Q, "KEY_LEFT", 0 }, + * { KEY_Y, "BTN_A", 1 }, + * { KEY_T, "BTN_A", 0 }, + * { KEY_H, "BTN_B", 1 }, + * { KEY_R, "BTN_B", 0 }, + * { KEY_U, "BTN_C", 1 }, + * { KEY_F, "BTN_C", 0 }, + * { KEY_J, "BTN_X", 1 }, + * { KEY_N, "BTN_X", 0 }, + * { KEY_I, "BTN_Y", 1 }, + * { KEY_M, "BTN_Y", 0 }, + * { KEY_K, "BTN_Z", 1 }, + * { KEY_P, "BTN_Z", 0 }, + * { KEY_O, "BTN_THUMBL", 1 }, + * { KEY_G, "BTN_THUMBL", 0 }, + * { KEY_L, "BTN_THUMBR", 1 }, + * { KEY_V, "BTN_THUMBR", 0 }, + * + * { } + * }; + * + * static int + * usage_for_key (int key) + * { + * int i; + * for (i = 0; i < 256; i++) { + * if (hid_keyboard[i] == key) + * return i; + * } + * assert(0); + * } + * + * int main (int argc, char **argv) + * { + * const struct icade_key_translation *trans; + * int max_usage = 0; + * + * for (trans = icade_keys; trans->from; trans++) { + * int usage = usage_for_key (trans->from); + * max_usage = usage > max_usage ? usage : max_usage; + * } + * + * printf ("#define ICADE_MAX_USAGE %d\n\n", max_usage); + * printf ("struct icade_key {\n"); + * printf ("\tu16 to;\n"); + * printf ("\tu8 press:1;\n"); + * printf ("};\n\n"); + * printf ("static const struct icade_key " + * "icade_usage_table[%d] = {\n", max_usage + 1); + * for (trans = icade_keys; trans->from; trans++) { + * printf ("\t[%d] = { %s, %d },\n", + * usage_for_key (trans->from), trans->to, trans->press); + * } + * printf ("};\n"); + * + * return 0; + * } + */ + +#define ICADE_MAX_USAGE 29 + +struct icade_key { + u16 to; + u8 press:1; +}; + +static const struct icade_key icade_usage_table[30] = { + [26] = { KEY_UP, 1 }, + [8] = { KEY_UP, 0 }, + [7] = { KEY_RIGHT, 1 }, + [6] = { KEY_RIGHT, 0 }, + [27] = { KEY_DOWN, 1 }, + [29] = { KEY_DOWN, 0 }, + [4] = { KEY_LEFT, 1 }, + [20] = { KEY_LEFT, 0 }, + [28] = { BTN_A, 1 }, + [23] = { BTN_A, 0 }, + [11] = { BTN_B, 1 }, + [21] = { BTN_B, 0 }, + [24] = { BTN_C, 1 }, + [9] = { BTN_C, 0 }, + [13] = { BTN_X, 1 }, + [17] = { BTN_X, 0 }, + [12] = { BTN_Y, 1 }, + [16] = { BTN_Y, 0 }, + [14] = { BTN_Z, 1 }, + [19] = { BTN_Z, 0 }, + [18] = { BTN_THUMBL, 1 }, + [10] = { BTN_THUMBL, 0 }, + [15] = { BTN_THUMBR, 1 }, + [25] = { BTN_THUMBR, 0 }, +}; + +static const struct icade_key *icade_find_translation(u16 from) +{ + if (from < 0 || from > ICADE_MAX_USAGE) + return NULL; + return &icade_usage_table[from]; +} + +static int icade_event(struct hid_device *hdev, struct hid_field *field, + struct hid_usage *usage, __s32 value) +{ + const struct icade_key *trans; + + if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput || + !usage->type) + return 0; + + /* We ignore the fake key up, and act only on key down */ + if (!value) + return 1; + + trans = icade_find_translation(usage->hid & HID_USAGE); + + if (!trans) + return 1; + + input_event(field->hidinput->input, usage->type, + trans->to, trans->press); + + return 1; +} + +static int icade_input_mapping(struct hid_device *hdev, struct hid_input *hi, + struct hid_field *field, struct hid_usage *usage, + unsigned long **bit, int *max) +{ + const struct icade_key *trans; + + if ((usage->hid & HID_USAGE_PAGE) == HID_UP_KEYBOARD) { + trans = icade_find_translation(usage->hid & HID_USAGE); + + if (!trans) + return -1; + + hid_map_usage(hi, usage, bit, max, EV_KEY, trans->to); + set_bit(trans->to, hi->input->keybit); + + return 1; + } + + /* ignore others */ + return -1; + +} + +static int icade_input_mapped(struct hid_device *hdev, struct hid_input *hi, + struct hid_field *field, struct hid_usage *usage, + unsigned long **bit, int *max) +{ + if (usage->type == EV_KEY) + set_bit(usage->type, hi->input->evbit); + + return -1; +} + +static const struct hid_device_id icade_devices[] = { + { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ION, USB_DEVICE_ID_ICADE) }, + + { } +}; +MODULE_DEVICE_TABLE(hid, icade_devices); + +static struct hid_driver icade_driver = { + .name = "icade", + .id_table = icade_devices, + .event = icade_event, + .input_mapped = icade_input_mapped, + .input_mapping = icade_input_mapping, +}; + +static int __init icade_init(void) +{ + int ret; + + ret = hid_register_driver(&icade_driver); + if (ret) + pr_err("can't register icade driver\n"); + + return ret; +} + +static void __exit icade_exit(void) +{ + hid_unregister_driver(&icade_driver); +} + +module_init(icade_init); +module_exit(icade_exit); +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Bastien Nocera <hadess@hadess.net>"); +MODULE_DESCRIPTION("ION iCade input driver"); |