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-rw-r--r--sound/usb/caiaq/caiaq-input.c246
1 files changed, 246 insertions, 0 deletions
diff --git a/sound/usb/caiaq/caiaq-input.c b/sound/usb/caiaq/caiaq-input.c
new file mode 100644
index 000000000000..3acd12db6952
--- /dev/null
+++ b/sound/usb/caiaq/caiaq-input.c
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1/*
2 * Copyright (c) 2006,2007 Daniel Mack, Tim Ruetz
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17*/
18
19#include <linux/init.h>
20#include <linux/module.h>
21#include <linux/moduleparam.h>
22#include <linux/input.h>
23#include <linux/usb.h>
24#include <linux/spinlock.h>
25#include <sound/driver.h>
26#include <sound/core.h>
27#include <sound/rawmidi.h>
28#include <sound/pcm.h>
29#include "caiaq-device.h"
30#include "caiaq-input.h"
31
32#ifdef CONFIG_SND_USB_CAIAQ_INPUT
33
34static unsigned char keycode_ak1[] = { KEY_C, KEY_B, KEY_A };
35static unsigned char keycode_rk2[] = { KEY_1, KEY_2, KEY_3, KEY_4,
36 KEY_5, KEY_6, KEY_7 };
37
38#define DEG90 (range/2)
39#define DEG180 (range)
40#define DEG270 (DEG90 + DEG180)
41#define DEG360 (DEG180 * 2)
42#define HIGH_PEAK (268)
43#define LOW_PEAK (-7)
44
45/* some of these devices have endless rotation potentiometers
46 * built in which use two tapers, 90 degrees phase shifted.
47 * this algorithm decodes them to one single value, ranging
48 * from 0 to 999 */
49static unsigned int decode_erp(unsigned char a, unsigned char b)
50{
51 int weight_a, weight_b;
52 int pos_a, pos_b;
53 int ret;
54 int range = HIGH_PEAK - LOW_PEAK;
55 int mid_value = (HIGH_PEAK + LOW_PEAK) / 2;
56
57 weight_b = abs(mid_value-a) - (range/2 - 100)/2;
58
59 if (weight_b < 0)
60 weight_b = 0;
61
62 if (weight_b > 100)
63 weight_b = 100;
64
65 weight_a = 100 - weight_b;
66
67 if (a < mid_value) {
68 /* 0..90 and 270..360 degrees */
69 pos_b = b - LOW_PEAK + DEG270;
70 if (pos_b >= DEG360)
71 pos_b -= DEG360;
72 } else
73 /* 90..270 degrees */
74 pos_b = HIGH_PEAK - b + DEG90;
75
76
77 if (b > mid_value)
78 /* 0..180 degrees */
79 pos_a = a - LOW_PEAK;
80 else
81 /* 180..360 degrees */
82 pos_a = HIGH_PEAK - a + DEG180;
83
84 /* interpolate both slider values, depending on weight factors */
85 /* 0..99 x DEG360 */
86 ret = pos_a * weight_a + pos_b * weight_b;
87
88 /* normalize to 0..999 */
89 ret *= 10;
90 ret /= DEG360;
91
92 if (ret < 0)
93 ret += 1000;
94
95 if (ret >= 1000)
96 ret -= 1000;
97
98 return ret;
99}
100
101#undef DEG90
102#undef DEG180
103#undef DEG270
104#undef DEG360
105#undef HIGH_PEAK
106#undef LOW_PEAK
107
108
109static void snd_caiaq_input_read_analog(struct snd_usb_caiaqdev *dev,
110 const char *buf, unsigned int len)
111{
112 switch(dev->input_dev->id.product) {
113 case USB_PID_RIGKONTROL2:
114 input_report_abs(dev->input_dev, ABS_X, (buf[4] << 8) |buf[5]);
115 input_report_abs(dev->input_dev, ABS_Y, (buf[0] << 8) |buf[1]);
116 input_report_abs(dev->input_dev, ABS_Z, (buf[2] << 8) |buf[3]);
117 input_sync(dev->input_dev);
118 break;
119 }
120}
121
122static void snd_caiaq_input_read_erp(struct snd_usb_caiaqdev *dev,
123 const char *buf, unsigned int len)
124{
125 int i;
126
127 switch(dev->input_dev->id.product) {
128 case USB_PID_AK1:
129 i = decode_erp(buf[0], buf[1]);
130 input_report_abs(dev->input_dev, ABS_X, i);
131 input_sync(dev->input_dev);
132 break;
133 }
134}
135
136static void snd_caiaq_input_read_io(struct snd_usb_caiaqdev *dev,
137 char *buf, unsigned int len)
138{
139 int i;
140 unsigned char *keycode = dev->input_dev->keycode;
141
142 if (!keycode)
143 return;
144
145 if (dev->input_dev->id.product == USB_PID_RIGKONTROL2)
146 for (i=0; i<len; i++)
147 buf[i] = ~buf[i];
148
149 for (i=0; (i<dev->input_dev->keycodemax) && (i < len); i++)
150 input_report_key(dev->input_dev, keycode[i],
151 buf[i/8] & (1 << (i%8)));
152
153 input_sync(dev->input_dev);
154}
155
156void snd_usb_caiaq_input_dispatch(struct snd_usb_caiaqdev *dev,
157 char *buf,
158 unsigned int len)
159{
160 if (!dev->input_dev || (len < 1))
161 return;
162
163 switch (buf[0]) {
164 case EP1_CMD_READ_ANALOG:
165 snd_caiaq_input_read_analog(dev, buf+1, len-1);
166 break;
167 case EP1_CMD_READ_ERP:
168 snd_caiaq_input_read_erp(dev, buf+1, len-1);
169 break;
170 case EP1_CMD_READ_IO:
171 snd_caiaq_input_read_io(dev, buf+1, len-1);
172 break;
173 }
174}
175
176int snd_usb_caiaq_input_init(struct snd_usb_caiaqdev *dev)
177{
178 struct usb_device *usb_dev = dev->chip.dev;
179 struct input_dev *input;
180 int i, ret;
181
182 input = input_allocate_device();
183 if (!input)
184 return -ENOMEM;
185
186 input->name = dev->product_name;
187 input->id.bustype = BUS_USB;
188 input->id.vendor = usb_dev->descriptor.idVendor;
189 input->id.product = usb_dev->descriptor.idProduct;
190 input->id.version = usb_dev->descriptor.bcdDevice;
191
192 switch (dev->chip.usb_id) {
193 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_RIGKONTROL2):
194 input->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
195 input->absbit[0] = BIT(ABS_X) | BIT(ABS_Y) | BIT(ABS_Z);
196 input->keycode = keycode_rk2;
197 input->keycodesize = sizeof(char);
198 input->keycodemax = ARRAY_SIZE(keycode_rk2);
199 for (i=0; i<ARRAY_SIZE(keycode_rk2); i++)
200 set_bit(keycode_rk2[i], input->keybit);
201
202 input_set_abs_params(input, ABS_X, 0, 4096, 0, 10);
203 input_set_abs_params(input, ABS_Y, 0, 4096, 0, 10);
204 input_set_abs_params(input, ABS_Z, 0, 4096, 0, 10);
205 snd_usb_caiaq_set_auto_msg(dev, 1, 10, 0);
206 break;
207 case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AK1):
208 input->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
209 input->absbit[0] = BIT(ABS_X);
210 input->keycode = keycode_ak1;
211 input->keycodesize = sizeof(char);
212 input->keycodemax = ARRAY_SIZE(keycode_ak1);
213 for (i=0; i<ARRAY_SIZE(keycode_ak1); i++)
214 set_bit(keycode_ak1[i], input->keybit);
215
216 input_set_abs_params(input, ABS_X, 0, 999, 0, 10);
217 snd_usb_caiaq_set_auto_msg(dev, 1, 0, 5);
218 break;
219 default:
220 /* no input methods supported on this device */
221 input_free_device(input);
222 return 0;
223 }
224
225 ret = input_register_device(input);
226 if (ret < 0) {
227 input_free_device(input);
228 return ret;
229 }
230
231 dev->input_dev = input;
232 return 0;
233}
234
235void snd_usb_caiaq_input_free(struct snd_usb_caiaqdev *dev)
236{
237 if (!dev || !dev->input_dev)
238 return;
239
240 input_unregister_device(dev->input_dev);
241 input_free_device(dev->input_dev);
242 dev->input_dev = NULL;
243}
244
245#endif /* CONFIG_SND_USB_CAIAQ_INPUT */
246
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