498 lines
12 KiB
C
498 lines
12 KiB
C
/*
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*
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* keyboard input driver for i2c IR remote controls
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*
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* Copyright (c) 2000-2003 Gerd Knorr <kraxel@bytesex.org>
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* modified for PixelView (BT878P+W/FM) by
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* Michal Kochanowicz <mkochano@pld.org.pl>
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* Christoph Bartelmus <lirc@bartelmus.de>
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* modified for KNC ONE TV Station/Anubis Typhoon TView Tuner by
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* Ulrich Mueller <ulrich.mueller42@web.de>
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* modified for em2820 based USB TV tuners by
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* Markus Rechberger <mrechberger@gmail.com>
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* modified for DViCO Fusion HDTV 5 RT GOLD by
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* Chaogui Zhang <czhang1974@gmail.com>
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* modified for MSI TV@nywhere Plus by
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* Henry Wong <henry@stuffedcow.net>
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* Mark Schultz <n9xmj@yahoo.com>
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* Brian Rogers <brian_rogers@comcast.net>
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* modified for AVerMedia Cardbus by
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* Oldrich Jedlicka <oldium.pro@seznam.cz>
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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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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/timer.h>
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#include <linux/delay.h>
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#include <linux/errno.h>
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#include <linux/slab.h>
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#include <linux/i2c.h>
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#include <linux/workqueue.h>
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#include <media/rc-core.h>
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#include <media/ir-kbd-i2c.h>
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/* ----------------------------------------------------------------------- */
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/* insmod parameters */
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static int debug;
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module_param(debug, int, 0644); /* debug level (0,1,2) */
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#define MODULE_NAME "ir-kbd-i2c"
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#define dprintk(level, fmt, arg...) if (debug >= level) \
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printk(KERN_DEBUG MODULE_NAME ": " fmt , ## arg)
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/* ----------------------------------------------------------------------- */
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static int get_key_haup_common(struct IR_i2c *ir, enum rc_type *protocol,
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u32 *scancode, u8 *ptoggle, int size, int offset)
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{
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unsigned char buf[6];
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int start, range, toggle, dev, code, ircode;
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/* poll IR chip */
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if (size != i2c_master_recv(ir->c, buf, size))
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return -EIO;
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/* split rc5 data block ... */
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start = (buf[offset] >> 7) & 1;
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range = (buf[offset] >> 6) & 1;
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toggle = (buf[offset] >> 5) & 1;
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dev = buf[offset] & 0x1f;
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code = (buf[offset+1] >> 2) & 0x3f;
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/* rc5 has two start bits
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* the first bit must be one
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* the second bit defines the command range (1 = 0-63, 0 = 64 - 127)
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*/
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if (!start)
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/* no key pressed */
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return 0;
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/* filter out invalid key presses */
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ircode = (start << 12) | (toggle << 11) | (dev << 6) | code;
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if ((ircode & 0x1fff) == 0x1fff)
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return 0;
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if (!range)
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code += 64;
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dprintk(1,"ir hauppauge (rc5): s%d r%d t%d dev=%d code=%d\n",
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start, range, toggle, dev, code);
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*protocol = RC_TYPE_RC5;
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*scancode = RC_SCANCODE_RC5(dev, code);
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*ptoggle = toggle;
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return 1;
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}
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static int get_key_haup(struct IR_i2c *ir, enum rc_type *protocol,
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u32 *scancode, u8 *toggle)
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{
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return get_key_haup_common (ir, protocol, scancode, toggle, 3, 0);
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}
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static int get_key_haup_xvr(struct IR_i2c *ir, enum rc_type *protocol,
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u32 *scancode, u8 *toggle)
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{
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int ret;
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unsigned char buf[1] = { 0 };
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/*
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* This is the same apparent "are you ready?" poll command observed
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* watching Windows driver traffic and implemented in lirc_zilog. With
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* this added, we get far saner remote behavior with z8 chips on usb
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* connected devices, even with the default polling interval of 100ms.
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*/
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ret = i2c_master_send(ir->c, buf, 1);
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if (ret != 1)
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return (ret < 0) ? ret : -EINVAL;
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return get_key_haup_common(ir, protocol, scancode, toggle, 6, 3);
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}
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static int get_key_pixelview(struct IR_i2c *ir, enum rc_type *protocol,
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u32 *scancode, u8 *toggle)
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{
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unsigned char b;
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/* poll IR chip */
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if (1 != i2c_master_recv(ir->c, &b, 1)) {
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dprintk(1,"read error\n");
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return -EIO;
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}
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*protocol = RC_TYPE_OTHER;
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*scancode = b;
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*toggle = 0;
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return 1;
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}
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static int get_key_fusionhdtv(struct IR_i2c *ir, enum rc_type *protocol,
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u32 *scancode, u8 *toggle)
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{
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unsigned char buf[4];
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/* poll IR chip */
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if (4 != i2c_master_recv(ir->c, buf, 4)) {
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dprintk(1,"read error\n");
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return -EIO;
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}
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if(buf[0] !=0 || buf[1] !=0 || buf[2] !=0 || buf[3] != 0)
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dprintk(2, "%s: 0x%2x 0x%2x 0x%2x 0x%2x\n", __func__,
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buf[0], buf[1], buf[2], buf[3]);
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/* no key pressed or signal from other ir remote */
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if(buf[0] != 0x1 || buf[1] != 0xfe)
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return 0;
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*protocol = RC_TYPE_UNKNOWN;
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*scancode = buf[2];
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*toggle = 0;
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return 1;
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}
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static int get_key_knc1(struct IR_i2c *ir, enum rc_type *protocol,
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u32 *scancode, u8 *toggle)
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{
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unsigned char b;
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/* poll IR chip */
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if (1 != i2c_master_recv(ir->c, &b, 1)) {
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dprintk(1,"read error\n");
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return -EIO;
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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
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down. 0xfe sequences are sometimes interrupted by 0xFF */
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dprintk(2,"key %02x\n", b);
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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_TYPE_UNKNOWN;
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*scancode = b;
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*toggle = 0;
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return 1;
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}
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static int get_key_avermedia_cardbus(struct IR_i2c *ir, enum rc_type *protocol,
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u32 *scancode, u8 *toggle)
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{
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unsigned char subaddr, key, keygroup;
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struct i2c_msg msg[] = { { .addr = ir->c->addr, .flags = 0,
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.buf = &subaddr, .len = 1},
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{ .addr = ir->c->addr, .flags = I2C_M_RD,
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.buf = &key, .len = 1} };
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subaddr = 0x0d;
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if (2 != i2c_transfer(ir->c->adapter, msg, 2)) {
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dprintk(1, "read error\n");
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return -EIO;
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}
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if (key == 0xff)
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return 0;
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subaddr = 0x0b;
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msg[1].buf = &keygroup;
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if (2 != i2c_transfer(ir->c->adapter, msg, 2)) {
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dprintk(1, "read error\n");
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return -EIO;
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}
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if (keygroup == 0xff)
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return 0;
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dprintk(1, "read key 0x%02x/0x%02x\n", key, keygroup);
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if (keygroup < 2 || keygroup > 4) {
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/* Only a warning */
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dprintk(1, "warning: invalid key group 0x%02x for key 0x%02x\n",
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keygroup, key);
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}
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key |= (keygroup & 1) << 6;
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*protocol = RC_TYPE_UNKNOWN;
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*scancode = key;
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if (ir->c->addr == 0x41) /* AVerMedia EM78P153 */
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*scancode |= keygroup << 8;
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*toggle = 0;
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return 1;
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}
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/* ----------------------------------------------------------------------- */
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static int ir_key_poll(struct IR_i2c *ir)
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{
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enum rc_type protocol;
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u32 scancode;
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u8 toggle;
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int rc;
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dprintk(3, "%s\n", __func__);
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rc = ir->get_key(ir, &protocol, &scancode, &toggle);
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if (rc < 0) {
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dprintk(2,"error\n");
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return rc;
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}
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if (rc) {
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dprintk(1, "%s: proto = 0x%04x, scancode = 0x%08x\n",
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__func__, protocol, scancode);
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rc_keydown(ir->rc, protocol, scancode, toggle);
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}
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return 0;
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}
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static void ir_work(struct work_struct *work)
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{
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int rc;
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struct IR_i2c *ir = container_of(work, struct IR_i2c, work.work);
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rc = ir_key_poll(ir);
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if (rc == -ENODEV) {
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rc_unregister_device(ir->rc);
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ir->rc = NULL;
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return;
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}
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schedule_delayed_work(&ir->work, msecs_to_jiffies(ir->polling_interval));
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}
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/* ----------------------------------------------------------------------- */
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static int ir_probe(struct i2c_client *client, const struct i2c_device_id *id)
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{
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char *ir_codes = NULL;
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const char *name = NULL;
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u64 rc_type = RC_BIT_UNKNOWN;
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struct IR_i2c *ir;
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struct rc_dev *rc = NULL;
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struct i2c_adapter *adap = client->adapter;
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unsigned short addr = client->addr;
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int err;
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ir = devm_kzalloc(&client->dev, sizeof(*ir), GFP_KERNEL);
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if (!ir)
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return -ENOMEM;
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ir->c = client;
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ir->polling_interval = DEFAULT_POLLING_INTERVAL;
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i2c_set_clientdata(client, ir);
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switch(addr) {
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case 0x64:
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name = "Pixelview";
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ir->get_key = get_key_pixelview;
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rc_type = RC_BIT_OTHER;
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ir_codes = RC_MAP_EMPTY;
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break;
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case 0x18:
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case 0x1f:
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case 0x1a:
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name = "Hauppauge";
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ir->get_key = get_key_haup;
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rc_type = RC_BIT_RC5;
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ir_codes = RC_MAP_HAUPPAUGE;
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break;
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case 0x30:
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name = "KNC One";
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ir->get_key = get_key_knc1;
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rc_type = RC_BIT_OTHER;
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ir_codes = RC_MAP_EMPTY;
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break;
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case 0x6b:
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name = "FusionHDTV";
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ir->get_key = get_key_fusionhdtv;
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rc_type = RC_BIT_UNKNOWN;
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ir_codes = RC_MAP_FUSIONHDTV_MCE;
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break;
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case 0x40:
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name = "AVerMedia Cardbus remote";
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ir->get_key = get_key_avermedia_cardbus;
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rc_type = RC_BIT_OTHER;
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ir_codes = RC_MAP_AVERMEDIA_CARDBUS;
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break;
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case 0x41:
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name = "AVerMedia EM78P153";
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ir->get_key = get_key_avermedia_cardbus;
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rc_type = RC_BIT_OTHER;
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/* RM-KV remote, seems to be same as RM-K6 */
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ir_codes = RC_MAP_AVERMEDIA_M733A_RM_K6;
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break;
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case 0x71:
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name = "Hauppauge/Zilog Z8";
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ir->get_key = get_key_haup_xvr;
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rc_type = RC_BIT_RC5;
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ir_codes = RC_MAP_HAUPPAUGE;
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break;
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}
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/* Let the caller override settings */
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if (client->dev.platform_data) {
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const struct IR_i2c_init_data *init_data =
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client->dev.platform_data;
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ir_codes = init_data->ir_codes;
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rc = init_data->rc_dev;
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name = init_data->name;
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if (init_data->type)
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rc_type = init_data->type;
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if (init_data->polling_interval)
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ir->polling_interval = init_data->polling_interval;
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switch (init_data->internal_get_key_func) {
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case IR_KBD_GET_KEY_CUSTOM:
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/* The bridge driver provided us its own function */
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ir->get_key = init_data->get_key;
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break;
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case IR_KBD_GET_KEY_PIXELVIEW:
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ir->get_key = get_key_pixelview;
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break;
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case IR_KBD_GET_KEY_HAUP:
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ir->get_key = get_key_haup;
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break;
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case IR_KBD_GET_KEY_KNC1:
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ir->get_key = get_key_knc1;
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break;
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case IR_KBD_GET_KEY_FUSIONHDTV:
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ir->get_key = get_key_fusionhdtv;
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break;
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case IR_KBD_GET_KEY_HAUP_XVR:
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ir->get_key = get_key_haup_xvr;
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break;
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case IR_KBD_GET_KEY_AVERMEDIA_CARDBUS:
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ir->get_key = get_key_avermedia_cardbus;
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break;
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}
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}
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if (!rc) {
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/*
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* If platform_data doesn't specify rc_dev, initialize it
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* internally
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*/
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rc = rc_allocate_device();
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if (!rc)
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return -ENOMEM;
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}
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ir->rc = rc;
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/* Make sure we are all setup before going on */
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if (!name || !ir->get_key || !rc_type || !ir_codes) {
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dprintk(1, ": Unsupported device at address 0x%02x\n",
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addr);
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err = -ENODEV;
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goto err_out_free;
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}
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/* Sets name */
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snprintf(ir->name, sizeof(ir->name), "i2c IR (%s)", name);
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ir->ir_codes = ir_codes;
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snprintf(ir->phys, sizeof(ir->phys), "%s/%s/ir0",
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dev_name(&adap->dev),
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dev_name(&client->dev));
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/*
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* Initialize input_dev fields
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* It doesn't make sense to allow overriding them via platform_data
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*/
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rc->input_id.bustype = BUS_I2C;
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rc->input_phys = ir->phys;
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rc->input_name = ir->name;
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/*
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* Initialize the other fields of rc_dev
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*/
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rc->map_name = ir->ir_codes;
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rc->allowed_protocols = rc_type;
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rc->enabled_protocols = rc_type;
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if (!rc->driver_name)
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rc->driver_name = MODULE_NAME;
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err = rc_register_device(rc);
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if (err)
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goto err_out_free;
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printk(MODULE_NAME ": %s detected at %s [%s]\n",
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ir->name, ir->phys, adap->name);
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/* start polling via eventd */
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INIT_DELAYED_WORK(&ir->work, ir_work);
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schedule_delayed_work(&ir->work, 0);
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return 0;
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err_out_free:
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/* Only frees rc if it were allocated internally */
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rc_free_device(rc);
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return err;
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}
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static int ir_remove(struct i2c_client *client)
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{
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struct IR_i2c *ir = i2c_get_clientdata(client);
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/* kill outstanding polls */
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cancel_delayed_work_sync(&ir->work);
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/* unregister device */
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rc_unregister_device(ir->rc);
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/* free memory */
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return 0;
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}
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static const struct i2c_device_id ir_kbd_id[] = {
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/* Generic entry for any IR receiver */
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{ "ir_video", 0 },
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/* IR device specific entries should be added here */
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{ "ir_rx_z8f0811_haup", 0 },
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{ "ir_rx_z8f0811_hdpvr", 0 },
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{ }
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};
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static struct i2c_driver ir_kbd_driver = {
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.driver = {
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.name = "ir-kbd-i2c",
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},
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.probe = ir_probe,
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.remove = ir_remove,
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.id_table = ir_kbd_id,
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};
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module_i2c_driver(ir_kbd_driver);
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/* ----------------------------------------------------------------------- */
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MODULE_AUTHOR("Gerd Knorr, Michal Kochanowicz, Christoph Bartelmus, Ulrich Mueller");
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MODULE_DESCRIPTION("input driver for i2c IR remote controls");
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MODULE_LICENSE("GPL");
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