![Mauro Carvalho Chehab](/assets/img/avatar_default.png)
From now on, I'll start using my @kernel.org as my development e-mail. As such, let's remove the entries that point to the old mchehab@s-opensource.com at MAINTAINERS file. For the files written with a copyright with mchehab@s-opensource, let's keep Samsung on their names, using mchehab+samsung@kernel.org, in order to keep pointing to my employer, with sponsors the work. For the files written before I join Samsung (on July, 4 2013), let's just use mchehab@kernel.org. For bug reports, we can simply point to just kernel.org, as this will reach my mchehab+samsung inbox anyway. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com> Signed-off-by: Brian Warner <brian.warner@samsung.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
964 lines
24 KiB
C
964 lines
24 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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//
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// handle em28xx IR remotes via linux kernel input layer.
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//
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// Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it>
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// Markus Rechberger <mrechberger@gmail.com>
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// Mauro Carvalho Chehab <mchehab@kernel.org>
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// Sascha Sommer <saschasommer@freenet.de>
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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#include "em28xx.h"
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/interrupt.h>
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#include <linux/usb.h>
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#include <linux/slab.h>
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#include <linux/bitrev.h>
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#define EM28XX_SNAPSHOT_KEY KEY_CAMERA
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#define EM28XX_BUTTONS_DEBOUNCED_QUERY_INTERVAL 500 /* [ms] */
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#define EM28XX_BUTTONS_VOLATILE_QUERY_INTERVAL 100 /* [ms] */
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static unsigned int ir_debug;
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module_param(ir_debug, int, 0644);
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MODULE_PARM_DESC(ir_debug, "enable debug messages [IR]");
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#define MODULE_NAME "em28xx"
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#define dprintk(fmt, arg...) do { \
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if (ir_debug) \
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dev_printk(KERN_DEBUG, &ir->dev->intf->dev, \
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"input: %s: " fmt, __func__, ## arg); \
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} while (0)
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/*
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* Polling structure used by em28xx IR's
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*/
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struct em28xx_ir_poll_result {
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unsigned int toggle_bit:1;
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unsigned int read_count:7;
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enum rc_proto protocol;
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u32 scancode;
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};
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struct em28xx_IR {
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struct em28xx *dev;
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struct rc_dev *rc;
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char name[32];
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char phys[32];
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/* poll decoder */
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int polling;
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struct delayed_work work;
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unsigned int full_code:1;
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unsigned int last_readcount;
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u64 rc_proto;
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struct i2c_client *i2c_client;
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int (*get_key_i2c)(struct i2c_client *ir, enum rc_proto *protocol,
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u32 *scancode);
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int (*get_key)(struct em28xx_IR *ir, struct em28xx_ir_poll_result *r);
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};
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/*
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* I2C IR based get keycodes - should be used with ir-kbd-i2c
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*/
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static int em28xx_get_key_terratec(struct i2c_client *i2c_dev,
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enum rc_proto *protocol, u32 *scancode)
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{
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int rc;
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unsigned char b;
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/* poll IR chip */
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rc = i2c_master_recv(i2c_dev, &b, 1);
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if (rc != 1) {
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if (rc < 0)
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return rc;
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return -EIO;
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}
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/*
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* it seems that 0xFE indicates that a button is still hold
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* down, while 0xff indicates that no button is hold down.
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*/
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if (b == 0xff)
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return 0;
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if (b == 0xfe)
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/* keep old data */
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return 1;
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*protocol = RC_PROTO_UNKNOWN;
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*scancode = b;
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return 1;
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}
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static int em28xx_get_key_em_haup(struct i2c_client *i2c_dev,
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enum rc_proto *protocol, u32 *scancode)
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{
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unsigned char buf[2];
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int size;
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/* poll IR chip */
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size = i2c_master_recv(i2c_dev, buf, sizeof(buf));
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if (size != 2)
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return -EIO;
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/* Does eliminate repeated parity code */
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if (buf[1] == 0xff)
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return 0;
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/*
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* Rearranges bits to the right order.
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* The bit order were determined experimentally by using
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* The original Hauppauge Grey IR and another RC5 that uses addr=0x08
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* The RC5 code has 14 bits, but we've experimentally determined
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* the meaning for only 11 bits.
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* So, the code translation is not complete. Yet, it is enough to
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* work with the provided RC5 IR.
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*/
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*protocol = RC_PROTO_RC5;
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*scancode = (bitrev8(buf[1]) & 0x1f) << 8 | bitrev8(buf[0]) >> 2;
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return 1;
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}
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static int em28xx_get_key_pinnacle_usb_grey(struct i2c_client *i2c_dev,
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enum rc_proto *protocol,
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u32 *scancode)
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{
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unsigned char buf[3];
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/* poll IR chip */
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if (i2c_master_recv(i2c_dev, buf, 3) != 3)
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return -EIO;
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if (buf[0] != 0x00)
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return 0;
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*protocol = RC_PROTO_UNKNOWN;
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*scancode = buf[2] & 0x3f;
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return 1;
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}
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static int em28xx_get_key_winfast_usbii_deluxe(struct i2c_client *i2c_dev,
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enum rc_proto *protocol,
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u32 *scancode)
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{
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unsigned char subaddr, keydetect, key;
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struct i2c_msg msg[] = {
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{
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.addr = i2c_dev->addr,
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.flags = 0,
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.buf = &subaddr, .len = 1
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}, {
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.addr = i2c_dev->addr,
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.flags = I2C_M_RD,
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.buf = &keydetect,
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.len = 1
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}
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};
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subaddr = 0x10;
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if (i2c_transfer(i2c_dev->adapter, msg, 2) != 2)
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return -EIO;
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if (keydetect == 0x00)
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return 0;
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subaddr = 0x00;
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msg[1].buf = &key;
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if (i2c_transfer(i2c_dev->adapter, msg, 2) != 2)
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return -EIO;
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if (key == 0x00)
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return 0;
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*protocol = RC_PROTO_UNKNOWN;
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*scancode = key;
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return 1;
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}
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/*
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* Poll based get keycode functions
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*/
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/* This is for the em2860/em2880 */
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static int default_polling_getkey(struct em28xx_IR *ir,
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struct em28xx_ir_poll_result *poll_result)
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{
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struct em28xx *dev = ir->dev;
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int rc;
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u8 msg[3] = { 0, 0, 0 };
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/*
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* Read key toggle, brand, and key code
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* on registers 0x45, 0x46 and 0x47
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*/
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rc = dev->em28xx_read_reg_req_len(dev, 0, EM28XX_R45_IR,
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msg, sizeof(msg));
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if (rc < 0)
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return rc;
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/* Infrared toggle (Reg 0x45[7]) */
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poll_result->toggle_bit = (msg[0] >> 7);
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/* Infrared read count (Reg 0x45[6:0] */
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poll_result->read_count = (msg[0] & 0x7f);
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/* Remote Control Address/Data (Regs 0x46/0x47) */
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switch (ir->rc_proto) {
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case RC_PROTO_BIT_RC5:
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poll_result->protocol = RC_PROTO_RC5;
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poll_result->scancode = RC_SCANCODE_RC5(msg[1], msg[2]);
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break;
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case RC_PROTO_BIT_NEC:
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poll_result->protocol = RC_PROTO_NEC;
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poll_result->scancode = RC_SCANCODE_NEC(msg[1], msg[2]);
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break;
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default:
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poll_result->protocol = RC_PROTO_UNKNOWN;
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poll_result->scancode = msg[1] << 8 | msg[2];
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break;
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}
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return 0;
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}
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static int em2874_polling_getkey(struct em28xx_IR *ir,
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struct em28xx_ir_poll_result *poll_result)
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{
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struct em28xx *dev = ir->dev;
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int rc;
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u8 msg[5] = { 0, 0, 0, 0, 0 };
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/*
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* Read key toggle, brand, and key code
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* on registers 0x51-55
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*/
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rc = dev->em28xx_read_reg_req_len(dev, 0, EM2874_R51_IR,
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msg, sizeof(msg));
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if (rc < 0)
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return rc;
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/* Infrared toggle (Reg 0x51[7]) */
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poll_result->toggle_bit = (msg[0] >> 7);
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/* Infrared read count (Reg 0x51[6:0] */
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poll_result->read_count = (msg[0] & 0x7f);
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/*
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* Remote Control Address (Reg 0x52)
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* Remote Control Data (Reg 0x53-0x55)
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*/
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switch (ir->rc_proto) {
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case RC_PROTO_BIT_RC5:
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poll_result->protocol = RC_PROTO_RC5;
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poll_result->scancode = RC_SCANCODE_RC5(msg[1], msg[2]);
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break;
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case RC_PROTO_BIT_NEC:
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poll_result->scancode = msg[1] << 8 | msg[2];
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if ((msg[3] ^ msg[4]) != 0xff) { /* 32 bits NEC */
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poll_result->protocol = RC_PROTO_NEC32;
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poll_result->scancode = RC_SCANCODE_NEC32((msg[1] << 24) |
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(msg[2] << 16) |
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(msg[3] << 8) |
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(msg[4]));
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} else if ((msg[1] ^ msg[2]) != 0xff) { /* 24 bits NEC */
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poll_result->protocol = RC_PROTO_NECX;
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poll_result->scancode = RC_SCANCODE_NECX(msg[1] << 8 |
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msg[2], msg[3]);
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} else { /* Normal NEC */
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poll_result->protocol = RC_PROTO_NEC;
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poll_result->scancode = RC_SCANCODE_NEC(msg[1], msg[3]);
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}
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break;
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case RC_PROTO_BIT_RC6_0:
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poll_result->protocol = RC_PROTO_RC6_0;
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poll_result->scancode = RC_SCANCODE_RC6_0(msg[1], msg[2]);
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break;
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default:
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poll_result->protocol = RC_PROTO_UNKNOWN;
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poll_result->scancode = (msg[1] << 24) | (msg[2] << 16) |
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(msg[3] << 8) | msg[4];
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break;
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}
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return 0;
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}
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/*
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* Polling code for em28xx
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*/
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static int em28xx_i2c_ir_handle_key(struct em28xx_IR *ir)
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{
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static u32 scancode;
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enum rc_proto protocol;
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int rc;
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rc = ir->get_key_i2c(ir->i2c_client, &protocol, &scancode);
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if (rc < 0) {
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dprintk("ir->get_key_i2c() failed: %d\n", rc);
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return rc;
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}
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if (rc) {
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dprintk("%s: proto = 0x%04x, scancode = 0x%04x\n",
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__func__, protocol, scancode);
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rc_keydown(ir->rc, protocol, scancode, 0);
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}
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return 0;
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}
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static void em28xx_ir_handle_key(struct em28xx_IR *ir)
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{
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int result;
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struct em28xx_ir_poll_result poll_result;
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/* read the registers containing the IR status */
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result = ir->get_key(ir, &poll_result);
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if (unlikely(result < 0)) {
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dprintk("ir->get_key() failed: %d\n", result);
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return;
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}
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if (unlikely(poll_result.read_count != ir->last_readcount)) {
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dprintk("%s: toggle: %d, count: %d, key 0x%04x\n", __func__,
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poll_result.toggle_bit, poll_result.read_count,
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poll_result.scancode);
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if (ir->full_code)
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rc_keydown(ir->rc,
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poll_result.protocol,
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poll_result.scancode,
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poll_result.toggle_bit);
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else
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rc_keydown(ir->rc,
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RC_PROTO_UNKNOWN,
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poll_result.scancode & 0xff,
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poll_result.toggle_bit);
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if (ir->dev->chip_id == CHIP_ID_EM2874 ||
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ir->dev->chip_id == CHIP_ID_EM2884)
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/*
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* The em2874 clears the readcount field every time the
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* register is read. The em2860/2880 datasheet says
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* that it is supposed to clear the readcount, but it
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* doesn't. So with the em2874, we are looking for a
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* non-zero read count as opposed to a readcount
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* that is incrementing
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*/
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ir->last_readcount = 0;
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else
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ir->last_readcount = poll_result.read_count;
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}
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}
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static void em28xx_ir_work(struct work_struct *work)
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{
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struct em28xx_IR *ir = container_of(work, struct em28xx_IR, work.work);
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if (ir->i2c_client) /* external i2c device */
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em28xx_i2c_ir_handle_key(ir);
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else /* internal device */
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em28xx_ir_handle_key(ir);
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schedule_delayed_work(&ir->work, msecs_to_jiffies(ir->polling));
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}
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static int em28xx_ir_start(struct rc_dev *rc)
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{
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struct em28xx_IR *ir = rc->priv;
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INIT_DELAYED_WORK(&ir->work, em28xx_ir_work);
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schedule_delayed_work(&ir->work, 0);
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return 0;
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}
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static void em28xx_ir_stop(struct rc_dev *rc)
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{
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struct em28xx_IR *ir = rc->priv;
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cancel_delayed_work_sync(&ir->work);
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}
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static int em2860_ir_change_protocol(struct rc_dev *rc_dev, u64 *rc_proto)
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{
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struct em28xx_IR *ir = rc_dev->priv;
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struct em28xx *dev = ir->dev;
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/* Adjust xclk based on IR table for RC5/NEC tables */
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if (*rc_proto & RC_PROTO_BIT_RC5) {
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dev->board.xclk |= EM28XX_XCLK_IR_RC5_MODE;
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ir->full_code = 1;
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*rc_proto = RC_PROTO_BIT_RC5;
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} else if (*rc_proto & RC_PROTO_BIT_NEC) {
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dev->board.xclk &= ~EM28XX_XCLK_IR_RC5_MODE;
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ir->full_code = 1;
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*rc_proto = RC_PROTO_BIT_NEC;
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} else if (*rc_proto & RC_PROTO_BIT_UNKNOWN) {
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*rc_proto = RC_PROTO_BIT_UNKNOWN;
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} else {
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*rc_proto = ir->rc_proto;
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return -EINVAL;
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}
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em28xx_write_reg_bits(dev, EM28XX_R0F_XCLK, dev->board.xclk,
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EM28XX_XCLK_IR_RC5_MODE);
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ir->rc_proto = *rc_proto;
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return 0;
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}
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static int em2874_ir_change_protocol(struct rc_dev *rc_dev, u64 *rc_proto)
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{
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struct em28xx_IR *ir = rc_dev->priv;
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struct em28xx *dev = ir->dev;
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u8 ir_config = EM2874_IR_RC5;
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/* Adjust xclk and set type based on IR table for RC5/NEC/RC6 tables */
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if (*rc_proto & RC_PROTO_BIT_RC5) {
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dev->board.xclk |= EM28XX_XCLK_IR_RC5_MODE;
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ir->full_code = 1;
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*rc_proto = RC_PROTO_BIT_RC5;
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} else if (*rc_proto & RC_PROTO_BIT_NEC) {
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dev->board.xclk &= ~EM28XX_XCLK_IR_RC5_MODE;
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ir_config = EM2874_IR_NEC | EM2874_IR_NEC_NO_PARITY;
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ir->full_code = 1;
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*rc_proto = RC_PROTO_BIT_NEC;
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} else if (*rc_proto & RC_PROTO_BIT_RC6_0) {
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dev->board.xclk |= EM28XX_XCLK_IR_RC5_MODE;
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ir_config = EM2874_IR_RC6_MODE_0;
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ir->full_code = 1;
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*rc_proto = RC_PROTO_BIT_RC6_0;
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} else if (*rc_proto & RC_PROTO_BIT_UNKNOWN) {
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*rc_proto = RC_PROTO_BIT_UNKNOWN;
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} else {
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*rc_proto = ir->rc_proto;
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return -EINVAL;
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}
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em28xx_write_regs(dev, EM2874_R50_IR_CONFIG, &ir_config, 1);
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em28xx_write_reg_bits(dev, EM28XX_R0F_XCLK, dev->board.xclk,
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EM28XX_XCLK_IR_RC5_MODE);
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ir->rc_proto = *rc_proto;
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return 0;
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}
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static int em28xx_ir_change_protocol(struct rc_dev *rc_dev, u64 *rc_proto)
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{
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struct em28xx_IR *ir = rc_dev->priv;
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struct em28xx *dev = ir->dev;
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/* Setup the proper handler based on the chip */
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switch (dev->chip_id) {
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case CHIP_ID_EM2860:
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case CHIP_ID_EM2883:
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return em2860_ir_change_protocol(rc_dev, rc_proto);
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case CHIP_ID_EM2884:
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case CHIP_ID_EM2874:
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case CHIP_ID_EM28174:
|
|
case CHIP_ID_EM28178:
|
|
return em2874_ir_change_protocol(rc_dev, rc_proto);
|
|
default:
|
|
dev_err(&ir->dev->intf->dev,
|
|
"Unrecognized em28xx chip id 0x%02x: IR not supported\n",
|
|
dev->chip_id);
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
static int em28xx_probe_i2c_ir(struct em28xx *dev)
|
|
{
|
|
int i = 0;
|
|
/*
|
|
* Leadtek winfast tv USBII deluxe can find a non working IR-device
|
|
* at address 0x18, so if that address is needed for another board in
|
|
* the future, please put it after 0x1f.
|
|
*/
|
|
const unsigned short addr_list[] = {
|
|
0x1f, 0x30, 0x47, I2C_CLIENT_END
|
|
};
|
|
|
|
while (addr_list[i] != I2C_CLIENT_END) {
|
|
if (i2c_probe_func_quick_read(&dev->i2c_adap[dev->def_i2c_bus],
|
|
addr_list[i]) == 1)
|
|
return addr_list[i];
|
|
i++;
|
|
}
|
|
|
|
return -ENODEV;
|
|
}
|
|
|
|
/*
|
|
* Handle buttons
|
|
*/
|
|
|
|
static void em28xx_query_buttons(struct work_struct *work)
|
|
{
|
|
struct em28xx *dev =
|
|
container_of(work, struct em28xx, buttons_query_work.work);
|
|
u8 i, j;
|
|
int regval;
|
|
bool is_pressed, was_pressed;
|
|
const struct em28xx_led *led;
|
|
|
|
/* Poll and evaluate all addresses */
|
|
for (i = 0; i < dev->num_button_polling_addresses; i++) {
|
|
/* Read value from register */
|
|
regval = em28xx_read_reg(dev, dev->button_polling_addresses[i]);
|
|
if (regval < 0)
|
|
continue;
|
|
/* Check states of the buttons and act */
|
|
j = 0;
|
|
while (dev->board.buttons[j].role >= 0 &&
|
|
dev->board.buttons[j].role < EM28XX_NUM_BUTTON_ROLES) {
|
|
const struct em28xx_button *button;
|
|
|
|
button = &dev->board.buttons[j];
|
|
|
|
/* Check if button uses the current address */
|
|
if (button->reg_r != dev->button_polling_addresses[i]) {
|
|
j++;
|
|
continue;
|
|
}
|
|
/* Determine if button is and was pressed last time */
|
|
is_pressed = regval & button->mask;
|
|
was_pressed = dev->button_polling_last_values[i]
|
|
& button->mask;
|
|
if (button->inverted) {
|
|
is_pressed = !is_pressed;
|
|
was_pressed = !was_pressed;
|
|
}
|
|
/* Clear button state (if needed) */
|
|
if (is_pressed && button->reg_clearing)
|
|
em28xx_write_reg(dev, button->reg_clearing,
|
|
(~regval & button->mask)
|
|
| (regval & ~button->mask));
|
|
/* Handle button state */
|
|
if (!is_pressed || was_pressed) {
|
|
j++;
|
|
continue;
|
|
}
|
|
switch (button->role) {
|
|
case EM28XX_BUTTON_SNAPSHOT:
|
|
/* Emulate the keypress */
|
|
input_report_key(dev->sbutton_input_dev,
|
|
EM28XX_SNAPSHOT_KEY, 1);
|
|
/* Unpress the key */
|
|
input_report_key(dev->sbutton_input_dev,
|
|
EM28XX_SNAPSHOT_KEY, 0);
|
|
break;
|
|
case EM28XX_BUTTON_ILLUMINATION:
|
|
led = em28xx_find_led(dev,
|
|
EM28XX_LED_ILLUMINATION);
|
|
/* Switch illumination LED on/off */
|
|
if (led)
|
|
em28xx_toggle_reg_bits(dev,
|
|
led->gpio_reg,
|
|
led->gpio_mask);
|
|
break;
|
|
default:
|
|
WARN_ONCE(1, "BUG: unhandled button role.");
|
|
}
|
|
/* Next button */
|
|
j++;
|
|
}
|
|
/* Save current value for comparison during the next polling */
|
|
dev->button_polling_last_values[i] = regval;
|
|
}
|
|
/* Schedule next poll */
|
|
schedule_delayed_work(&dev->buttons_query_work,
|
|
msecs_to_jiffies(dev->button_polling_interval));
|
|
}
|
|
|
|
static int em28xx_register_snapshot_button(struct em28xx *dev)
|
|
{
|
|
struct usb_device *udev = interface_to_usbdev(dev->intf);
|
|
struct input_dev *input_dev;
|
|
int err;
|
|
|
|
dev_info(&dev->intf->dev, "Registering snapshot button...\n");
|
|
input_dev = input_allocate_device();
|
|
if (!input_dev)
|
|
return -ENOMEM;
|
|
|
|
usb_make_path(udev, dev->snapshot_button_path,
|
|
sizeof(dev->snapshot_button_path));
|
|
strlcat(dev->snapshot_button_path, "/sbutton",
|
|
sizeof(dev->snapshot_button_path));
|
|
|
|
input_dev->name = "em28xx snapshot button";
|
|
input_dev->phys = dev->snapshot_button_path;
|
|
input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
|
|
set_bit(EM28XX_SNAPSHOT_KEY, input_dev->keybit);
|
|
input_dev->keycodesize = 0;
|
|
input_dev->keycodemax = 0;
|
|
input_dev->id.bustype = BUS_USB;
|
|
input_dev->id.vendor = le16_to_cpu(udev->descriptor.idVendor);
|
|
input_dev->id.product = le16_to_cpu(udev->descriptor.idProduct);
|
|
input_dev->id.version = 1;
|
|
input_dev->dev.parent = &dev->intf->dev;
|
|
|
|
err = input_register_device(input_dev);
|
|
if (err) {
|
|
dev_err(&dev->intf->dev, "input_register_device failed\n");
|
|
input_free_device(input_dev);
|
|
return err;
|
|
}
|
|
|
|
dev->sbutton_input_dev = input_dev;
|
|
return 0;
|
|
}
|
|
|
|
static void em28xx_init_buttons(struct em28xx *dev)
|
|
{
|
|
u8 i = 0, j = 0;
|
|
bool addr_new = false;
|
|
|
|
dev->button_polling_interval = EM28XX_BUTTONS_DEBOUNCED_QUERY_INTERVAL;
|
|
while (dev->board.buttons[i].role >= 0 &&
|
|
dev->board.buttons[i].role < EM28XX_NUM_BUTTON_ROLES) {
|
|
const struct em28xx_button *button = &dev->board.buttons[i];
|
|
|
|
/* Check if polling address is already on the list */
|
|
addr_new = true;
|
|
for (j = 0; j < dev->num_button_polling_addresses; j++) {
|
|
if (button->reg_r == dev->button_polling_addresses[j]) {
|
|
addr_new = false;
|
|
break;
|
|
}
|
|
}
|
|
/* Check if max. number of polling addresses is exceeded */
|
|
if (addr_new && dev->num_button_polling_addresses
|
|
>= EM28XX_NUM_BUTTON_ADDRESSES_MAX) {
|
|
WARN_ONCE(1, "BUG: maximum number of button polling addresses exceeded.");
|
|
goto next_button;
|
|
}
|
|
/* Button role specific checks and actions */
|
|
if (button->role == EM28XX_BUTTON_SNAPSHOT) {
|
|
/* Register input device */
|
|
if (em28xx_register_snapshot_button(dev) < 0)
|
|
goto next_button;
|
|
} else if (button->role == EM28XX_BUTTON_ILLUMINATION) {
|
|
/* Check sanity */
|
|
if (!em28xx_find_led(dev, EM28XX_LED_ILLUMINATION)) {
|
|
dev_err(&dev->intf->dev,
|
|
"BUG: illumination button defined, but no illumination LED.\n");
|
|
goto next_button;
|
|
}
|
|
}
|
|
/* Add read address to list of polling addresses */
|
|
if (addr_new) {
|
|
unsigned int index = dev->num_button_polling_addresses;
|
|
|
|
dev->button_polling_addresses[index] = button->reg_r;
|
|
dev->num_button_polling_addresses++;
|
|
}
|
|
/* Reduce polling interval if necessary */
|
|
if (!button->reg_clearing)
|
|
dev->button_polling_interval =
|
|
EM28XX_BUTTONS_VOLATILE_QUERY_INTERVAL;
|
|
next_button:
|
|
/* Next button */
|
|
i++;
|
|
}
|
|
|
|
/* Start polling */
|
|
if (dev->num_button_polling_addresses) {
|
|
memset(dev->button_polling_last_values, 0,
|
|
EM28XX_NUM_BUTTON_ADDRESSES_MAX);
|
|
schedule_delayed_work(&dev->buttons_query_work,
|
|
msecs_to_jiffies(dev->button_polling_interval));
|
|
}
|
|
}
|
|
|
|
static void em28xx_shutdown_buttons(struct em28xx *dev)
|
|
{
|
|
/* Cancel polling */
|
|
cancel_delayed_work_sync(&dev->buttons_query_work);
|
|
/* Clear polling addresses list */
|
|
dev->num_button_polling_addresses = 0;
|
|
/* Deregister input devices */
|
|
if (dev->sbutton_input_dev) {
|
|
dev_info(&dev->intf->dev, "Deregistering snapshot button\n");
|
|
input_unregister_device(dev->sbutton_input_dev);
|
|
dev->sbutton_input_dev = NULL;
|
|
}
|
|
}
|
|
|
|
static int em28xx_ir_init(struct em28xx *dev)
|
|
{
|
|
struct usb_device *udev = interface_to_usbdev(dev->intf);
|
|
struct em28xx_IR *ir;
|
|
struct rc_dev *rc;
|
|
int err = -ENOMEM;
|
|
u64 rc_proto;
|
|
u16 i2c_rc_dev_addr = 0;
|
|
|
|
if (dev->is_audio_only) {
|
|
/* Shouldn't initialize IR for this interface */
|
|
return 0;
|
|
}
|
|
|
|
kref_get(&dev->ref);
|
|
INIT_DELAYED_WORK(&dev->buttons_query_work, em28xx_query_buttons);
|
|
|
|
if (dev->board.buttons)
|
|
em28xx_init_buttons(dev);
|
|
|
|
if (dev->board.has_ir_i2c) {
|
|
i2c_rc_dev_addr = em28xx_probe_i2c_ir(dev);
|
|
if (!i2c_rc_dev_addr) {
|
|
dev->board.has_ir_i2c = 0;
|
|
dev_warn(&dev->intf->dev,
|
|
"No i2c IR remote control device found.\n");
|
|
return -ENODEV;
|
|
}
|
|
}
|
|
|
|
if (!dev->board.ir_codes && !dev->board.has_ir_i2c) {
|
|
/* No remote control support */
|
|
dev_warn(&dev->intf->dev,
|
|
"Remote control support is not available for this card.\n");
|
|
return 0;
|
|
}
|
|
|
|
dev_info(&dev->intf->dev, "Registering input extension\n");
|
|
|
|
ir = kzalloc(sizeof(*ir), GFP_KERNEL);
|
|
if (!ir)
|
|
return -ENOMEM;
|
|
rc = rc_allocate_device(RC_DRIVER_SCANCODE);
|
|
if (!rc)
|
|
goto error;
|
|
|
|
/* record handles to ourself */
|
|
ir->dev = dev;
|
|
dev->ir = ir;
|
|
ir->rc = rc;
|
|
|
|
rc->priv = ir;
|
|
rc->open = em28xx_ir_start;
|
|
rc->close = em28xx_ir_stop;
|
|
|
|
if (dev->board.has_ir_i2c) { /* external i2c device */
|
|
switch (dev->model) {
|
|
case EM2800_BOARD_TERRATEC_CINERGY_200:
|
|
case EM2820_BOARD_TERRATEC_CINERGY_250:
|
|
rc->map_name = RC_MAP_EM_TERRATEC;
|
|
ir->get_key_i2c = em28xx_get_key_terratec;
|
|
break;
|
|
case EM2820_BOARD_PINNACLE_USB_2:
|
|
rc->map_name = RC_MAP_PINNACLE_GREY;
|
|
ir->get_key_i2c = em28xx_get_key_pinnacle_usb_grey;
|
|
break;
|
|
case EM2820_BOARD_HAUPPAUGE_WINTV_USB_2:
|
|
rc->map_name = RC_MAP_HAUPPAUGE;
|
|
ir->get_key_i2c = em28xx_get_key_em_haup;
|
|
rc->allowed_protocols = RC_PROTO_BIT_RC5;
|
|
break;
|
|
case EM2820_BOARD_LEADTEK_WINFAST_USBII_DELUXE:
|
|
rc->map_name = RC_MAP_WINFAST_USBII_DELUXE;
|
|
ir->get_key_i2c = em28xx_get_key_winfast_usbii_deluxe;
|
|
break;
|
|
default:
|
|
err = -ENODEV;
|
|
goto error;
|
|
}
|
|
|
|
ir->i2c_client = kzalloc(sizeof(*ir->i2c_client), GFP_KERNEL);
|
|
if (!ir->i2c_client)
|
|
goto error;
|
|
ir->i2c_client->adapter = &ir->dev->i2c_adap[dev->def_i2c_bus];
|
|
ir->i2c_client->addr = i2c_rc_dev_addr;
|
|
ir->i2c_client->flags = 0;
|
|
/* NOTE: all other fields of i2c_client are unused */
|
|
} else { /* internal device */
|
|
switch (dev->chip_id) {
|
|
case CHIP_ID_EM2860:
|
|
case CHIP_ID_EM2883:
|
|
rc->allowed_protocols = RC_PROTO_BIT_RC5 |
|
|
RC_PROTO_BIT_NEC;
|
|
ir->get_key = default_polling_getkey;
|
|
break;
|
|
case CHIP_ID_EM2884:
|
|
case CHIP_ID_EM2874:
|
|
case CHIP_ID_EM28174:
|
|
case CHIP_ID_EM28178:
|
|
ir->get_key = em2874_polling_getkey;
|
|
rc->allowed_protocols = RC_PROTO_BIT_RC5 |
|
|
RC_PROTO_BIT_NEC | RC_PROTO_BIT_NECX |
|
|
RC_PROTO_BIT_NEC32 | RC_PROTO_BIT_RC6_0;
|
|
break;
|
|
default:
|
|
err = -ENODEV;
|
|
goto error;
|
|
}
|
|
|
|
rc->change_protocol = em28xx_ir_change_protocol;
|
|
rc->map_name = dev->board.ir_codes;
|
|
|
|
/* By default, keep protocol field untouched */
|
|
rc_proto = RC_PROTO_BIT_UNKNOWN;
|
|
err = em28xx_ir_change_protocol(rc, &rc_proto);
|
|
if (err)
|
|
goto error;
|
|
}
|
|
|
|
/* This is how often we ask the chip for IR information */
|
|
ir->polling = 100; /* ms */
|
|
|
|
/* init input device */
|
|
snprintf(ir->name, sizeof(ir->name), "%s IR",
|
|
dev_name(&dev->intf->dev));
|
|
|
|
usb_make_path(udev, ir->phys, sizeof(ir->phys));
|
|
strlcat(ir->phys, "/input0", sizeof(ir->phys));
|
|
|
|
rc->device_name = ir->name;
|
|
rc->input_phys = ir->phys;
|
|
rc->input_id.bustype = BUS_USB;
|
|
rc->input_id.version = 1;
|
|
rc->input_id.vendor = le16_to_cpu(udev->descriptor.idVendor);
|
|
rc->input_id.product = le16_to_cpu(udev->descriptor.idProduct);
|
|
rc->dev.parent = &dev->intf->dev;
|
|
rc->driver_name = MODULE_NAME;
|
|
|
|
/* all done */
|
|
err = rc_register_device(rc);
|
|
if (err)
|
|
goto error;
|
|
|
|
dev_info(&dev->intf->dev, "Input extension successfully initialized\n");
|
|
|
|
return 0;
|
|
|
|
error:
|
|
kfree(ir->i2c_client);
|
|
dev->ir = NULL;
|
|
rc_free_device(rc);
|
|
kfree(ir);
|
|
return err;
|
|
}
|
|
|
|
static int em28xx_ir_fini(struct em28xx *dev)
|
|
{
|
|
struct em28xx_IR *ir = dev->ir;
|
|
|
|
if (dev->is_audio_only) {
|
|
/* Shouldn't initialize IR for this interface */
|
|
return 0;
|
|
}
|
|
|
|
dev_info(&dev->intf->dev, "Closing input extension\n");
|
|
|
|
em28xx_shutdown_buttons(dev);
|
|
|
|
/* skip detach on non attached boards */
|
|
if (!ir)
|
|
goto ref_put;
|
|
|
|
rc_unregister_device(ir->rc);
|
|
|
|
kfree(ir->i2c_client);
|
|
|
|
/* done */
|
|
kfree(ir);
|
|
dev->ir = NULL;
|
|
|
|
ref_put:
|
|
kref_put(&dev->ref, em28xx_free_device);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int em28xx_ir_suspend(struct em28xx *dev)
|
|
{
|
|
struct em28xx_IR *ir = dev->ir;
|
|
|
|
if (dev->is_audio_only)
|
|
return 0;
|
|
|
|
dev_info(&dev->intf->dev, "Suspending input extension\n");
|
|
if (ir)
|
|
cancel_delayed_work_sync(&ir->work);
|
|
cancel_delayed_work_sync(&dev->buttons_query_work);
|
|
/*
|
|
* is canceling delayed work sufficient or does the rc event
|
|
* kthread needs stopping? kthread is stopped in
|
|
* ir_raw_event_unregister()
|
|
*/
|
|
return 0;
|
|
}
|
|
|
|
static int em28xx_ir_resume(struct em28xx *dev)
|
|
{
|
|
struct em28xx_IR *ir = dev->ir;
|
|
|
|
if (dev->is_audio_only)
|
|
return 0;
|
|
|
|
dev_info(&dev->intf->dev, "Resuming input extension\n");
|
|
/*
|
|
* if suspend calls ir_raw_event_unregister(), the should call
|
|
* ir_raw_event_register()
|
|
*/
|
|
if (ir)
|
|
schedule_delayed_work(&ir->work, msecs_to_jiffies(ir->polling));
|
|
if (dev->num_button_polling_addresses)
|
|
schedule_delayed_work(&dev->buttons_query_work,
|
|
msecs_to_jiffies(dev->button_polling_interval));
|
|
return 0;
|
|
}
|
|
|
|
static struct em28xx_ops rc_ops = {
|
|
.id = EM28XX_RC,
|
|
.name = "Em28xx Input Extension",
|
|
.init = em28xx_ir_init,
|
|
.fini = em28xx_ir_fini,
|
|
.suspend = em28xx_ir_suspend,
|
|
.resume = em28xx_ir_resume,
|
|
};
|
|
|
|
static int __init em28xx_rc_register(void)
|
|
{
|
|
return em28xx_register_extension(&rc_ops);
|
|
}
|
|
|
|
static void __exit em28xx_rc_unregister(void)
|
|
{
|
|
em28xx_unregister_extension(&rc_ops);
|
|
}
|
|
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_AUTHOR("Mauro Carvalho Chehab");
|
|
MODULE_DESCRIPTION(DRIVER_DESC " - input interface");
|
|
MODULE_VERSION(EM28XX_VERSION);
|
|
|
|
module_init(em28xx_rc_register);
|
|
module_exit(em28xx_rc_unregister);
|