2 handle em28xx IR remotes via linux kernel input layer.
4 Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it>
5 Markus Rechberger <mrechberger@gmail.com>
6 Mauro Carvalho Chehab <mchehab@infradead.org>
7 Sascha Sommer <saschasommer@freenet.de>
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 #include <linux/module.h>
25 #include <linux/init.h>
26 #include <linux/delay.h>
27 #include <linux/interrupt.h>
28 #include <linux/input.h>
29 #include <linux/usb.h>
33 #define EM28XX_SNAPSHOT_KEY KEY_CAMERA
34 #define EM28XX_SBUTTON_QUERY_INTERVAL 500
35 #define EM28XX_R0C_USBSUSP_SNAPSHOT 0x20
37 static unsigned int ir_debug;
38 module_param(ir_debug, int, 0644);
39 MODULE_PARM_DESC(ir_debug, "enable debug messages [IR]");
41 #define dprintk(fmt, arg...) \
43 printk(KERN_DEBUG "%s/ir: " fmt, ir->c.name , ## arg); \
46 /* ----------------------------------------------------------------------- */
48 int em28xx_get_key_terratec(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
53 if (1 != i2c_master_recv(&ir->c, &b, 1)) {
54 dprintk("read error\n");
58 /* it seems that 0xFE indicates that a button is still hold
59 down, while 0xff indicates that no button is hold
60 down. 0xfe sequences are sometimes interrupted by 0xFF */
62 dprintk("key %02x\n", b);
77 int em28xx_get_key_em_haup(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
83 if (2 != i2c_master_recv(&ir->c, buf, 2))
86 /* Does eliminate repeated parity code */
92 /* Rearranges bits to the right order */
93 code = ((buf[0]&0x01)<<5) | /* 0010 0000 */
94 ((buf[0]&0x02)<<3) | /* 0001 0000 */
95 ((buf[0]&0x04)<<1) | /* 0000 1000 */
96 ((buf[0]&0x08)>>1) | /* 0000 0100 */
97 ((buf[0]&0x10)>>3) | /* 0000 0010 */
98 ((buf[0]&0x20)>>5); /* 0000 0001 */
100 dprintk("ir hauppauge (em2840): code=0x%02x (rcv=0x%02x)\n",
109 int em28xx_get_key_pinnacle_usb_grey(struct IR_i2c *ir, u32 *ir_key,
112 unsigned char buf[3];
116 if (3 != i2c_master_recv(&ir->c, buf, 3)) {
117 dprintk("read error\n");
121 dprintk("key %02x\n", buf[2]&0x3f);
125 *ir_key = buf[2]&0x3f;
126 *ir_raw = buf[2]&0x3f;
131 static void em28xx_query_sbutton(struct work_struct *work)
133 /* Poll the register and see if the button is depressed */
135 container_of(work, struct em28xx, sbutton_query_work.work);
138 ret = em28xx_read_reg(dev, EM28XX_R0C_USBSUSP);
140 if (ret & EM28XX_R0C_USBSUSP_SNAPSHOT) {
142 /* Button is depressed, clear the register */
143 cleared = ((u8) ret) & ~EM28XX_R0C_USBSUSP_SNAPSHOT;
144 em28xx_write_regs(dev, EM28XX_R0C_USBSUSP, &cleared, 1);
146 /* Not emulate the keypress */
147 input_report_key(dev->sbutton_input_dev, EM28XX_SNAPSHOT_KEY,
149 /* Now unpress the key */
150 input_report_key(dev->sbutton_input_dev, EM28XX_SNAPSHOT_KEY,
154 /* Schedule next poll */
155 schedule_delayed_work(&dev->sbutton_query_work,
156 msecs_to_jiffies(EM28XX_SBUTTON_QUERY_INTERVAL));
159 void em28xx_register_snapshot_button(struct em28xx *dev)
161 struct input_dev *input_dev;
164 em28xx_info("Registering snapshot button...\n");
165 input_dev = input_allocate_device();
167 em28xx_errdev("input_allocate_device failed\n");
171 usb_make_path(dev->udev, dev->snapshot_button_path,
172 sizeof(dev->snapshot_button_path));
173 strlcat(dev->snapshot_button_path, "/sbutton",
174 sizeof(dev->snapshot_button_path));
175 INIT_DELAYED_WORK(&dev->sbutton_query_work, em28xx_query_sbutton);
177 input_dev->name = "em28xx snapshot button";
178 input_dev->phys = dev->snapshot_button_path;
179 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
180 set_bit(EM28XX_SNAPSHOT_KEY, input_dev->keybit);
181 input_dev->keycodesize = 0;
182 input_dev->keycodemax = 0;
183 input_dev->id.bustype = BUS_USB;
184 input_dev->id.vendor = le16_to_cpu(dev->udev->descriptor.idVendor);
185 input_dev->id.product = le16_to_cpu(dev->udev->descriptor.idProduct);
186 input_dev->id.version = 1;
187 input_dev->dev.parent = &dev->udev->dev;
189 err = input_register_device(input_dev);
191 em28xx_errdev("input_register_device failed\n");
192 input_free_device(input_dev);
196 dev->sbutton_input_dev = input_dev;
197 schedule_delayed_work(&dev->sbutton_query_work,
198 msecs_to_jiffies(EM28XX_SBUTTON_QUERY_INTERVAL));
203 void em28xx_deregister_snapshot_button(struct em28xx *dev)
205 if (dev->sbutton_input_dev != NULL) {
206 em28xx_info("Deregistering snapshot button\n");
207 cancel_rearming_delayed_work(&dev->sbutton_query_work);
208 input_unregister_device(dev->sbutton_input_dev);
209 dev->sbutton_input_dev = NULL;
214 /* ----------------------------------------------------------------------