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linux/drivers/media/video/cx88/cx88-input.c
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2 
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00

397 lines
11 KiB
C
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/*
* $Id: cx88-input.c,v 1.9 2005/03/04 09:12:23 kraxel Exp $
*
* Device driver for GPIO attached remote control interfaces
* on Conexant 2388x based TV/DVB cards.
*
* Copyright (c) 2003 Pavel Machek
* Copyright (c) 2004 Gerd Knorr
* Copyright (c) 2004 Chris Pascoe
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/input.h>
#include <linux/pci.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <media/ir-common.h>
#include "cx88.h"
/* ---------------------------------------------------------------------- */
/* DigitalNow DNTV Live DVB-T Remote */
static IR_KEYTAB_TYPE ir_codes_dntv_live_dvb_t[IR_KEYTAB_SIZE] = {
[ 0x00 ] = KEY_ESC, // 'go up a level?'
[ 0x01 ] = KEY_KP1, // '1'
[ 0x02 ] = KEY_KP2, // '2'
[ 0x03 ] = KEY_KP3, // '3'
[ 0x04 ] = KEY_KP4, // '4'
[ 0x05 ] = KEY_KP5, // '5'
[ 0x06 ] = KEY_KP6, // '6'
[ 0x07 ] = KEY_KP7, // '7'
[ 0x08 ] = KEY_KP8, // '8'
[ 0x09 ] = KEY_KP9, // '9'
[ 0x0a ] = KEY_KP0, // '0'
[ 0x0b ] = KEY_TUNER, // 'tv/fm'
[ 0x0c ] = KEY_SEARCH, // 'scan'
[ 0x0d ] = KEY_STOP, // 'stop'
[ 0x0e ] = KEY_PAUSE, // 'pause'
[ 0x0f ] = KEY_LIST, // 'source'
[ 0x10 ] = KEY_MUTE, // 'mute'
[ 0x11 ] = KEY_REWIND, // 'backward <<'
[ 0x12 ] = KEY_POWER, // 'power'
[ 0x13 ] = KEY_S, // 'snap'
[ 0x14 ] = KEY_AUDIO, // 'stereo'
[ 0x15 ] = KEY_CLEAR, // 'reset'
[ 0x16 ] = KEY_PLAY, // 'play'
[ 0x17 ] = KEY_ENTER, // 'enter'
[ 0x18 ] = KEY_ZOOM, // 'full screen'
[ 0x19 ] = KEY_FASTFORWARD, // 'forward >>'
[ 0x1a ] = KEY_CHANNELUP, // 'channel +'
[ 0x1b ] = KEY_VOLUMEUP, // 'volume +'
[ 0x1c ] = KEY_INFO, // 'preview'
[ 0x1d ] = KEY_RECORD, // 'record'
[ 0x1e ] = KEY_CHANNELDOWN, // 'channel -'
[ 0x1f ] = KEY_VOLUMEDOWN, // 'volume -'
};
/* ---------------------------------------------------------------------- */
/* IO-DATA BCTV7E Remote */
static IR_KEYTAB_TYPE ir_codes_iodata_bctv7e[IR_KEYTAB_SIZE] = {
[ 0x40 ] = KEY_TV, // TV
[ 0x20 ] = KEY_RADIO, // FM
[ 0x60 ] = KEY_EPG, // EPG
[ 0x00 ] = KEY_POWER, // power
[ 0x50 ] = KEY_KP1, // 1
[ 0x30 ] = KEY_KP2, // 2
[ 0x70 ] = KEY_KP3, // 3
[ 0x10 ] = KEY_L, // Live
[ 0x48 ] = KEY_KP4, // 4
[ 0x28 ] = KEY_KP5, // 5
[ 0x68 ] = KEY_KP6, // 6
[ 0x08 ] = KEY_T, // Time Shift
[ 0x58 ] = KEY_KP7, // 7
[ 0x38 ] = KEY_KP8, // 8
[ 0x78 ] = KEY_KP9, // 9
[ 0x18 ] = KEY_PLAYPAUSE, // Play
[ 0x44 ] = KEY_KP0, // 10
[ 0x24 ] = KEY_ENTER, // 11
[ 0x64 ] = KEY_ESC, // 12
[ 0x04 ] = KEY_M, // Multi
[ 0x54 ] = KEY_VIDEO, // VIDEO
[ 0x34 ] = KEY_CHANNELUP, // channel +
[ 0x74 ] = KEY_VOLUMEUP, // volume +
[ 0x14 ] = KEY_MUTE, // Mute
[ 0x4c ] = KEY_S, // SVIDEO
[ 0x2c ] = KEY_CHANNELDOWN, // channel -
[ 0x6c ] = KEY_VOLUMEDOWN, // volume -
[ 0x0c ] = KEY_ZOOM, // Zoom
[ 0x5c ] = KEY_PAUSE, // pause
[ 0x3c ] = KEY_C, // || (red)
[ 0x7c ] = KEY_RECORD, // recording
[ 0x1c ] = KEY_STOP, // stop
[ 0x41 ] = KEY_REWIND, // backward <<
[ 0x21 ] = KEY_PLAY, // play
[ 0x61 ] = KEY_FASTFORWARD, // forward >>
[ 0x01 ] = KEY_NEXT, // skip >|
};
/* ---------------------------------------------------------------------- */
struct cx88_IR {
struct cx88_core *core;
struct input_dev input;
struct ir_input_state ir;
char name[32];
char phys[32];
/* sample from gpio pin 16 */
int sampling;
u32 samples[16];
int scount;
unsigned long release;
/* poll external decoder */
int polling;
struct work_struct work;
struct timer_list timer;
u32 gpio_addr;
u32 last_gpio;
u32 mask_keycode;
u32 mask_keydown;
u32 mask_keyup;
};
static int ir_debug = 0;
module_param(ir_debug, int, 0644); /* debug level [IR] */
MODULE_PARM_DESC(ir_debug, "enable debug messages [IR]");
#define ir_dprintk(fmt, arg...) if (ir_debug) \
printk(KERN_DEBUG "%s IR: " fmt , ir->core->name, ## arg)
/* ---------------------------------------------------------------------- */
static void cx88_ir_handle_key(struct cx88_IR *ir)
{
struct cx88_core *core = ir->core;
u32 gpio, data;
/* read gpio value */
gpio = cx_read(ir->gpio_addr);
if (ir->polling) {
if (ir->last_gpio == gpio)
return;
ir->last_gpio = gpio;
}
/* extract data */
data = ir_extract_bits(gpio, ir->mask_keycode);
ir_dprintk("irq gpio=0x%x code=%d | %s%s%s\n",
gpio, data,
ir->polling ? "poll" : "irq",
(gpio & ir->mask_keydown) ? " down" : "",
(gpio & ir->mask_keyup) ? " up" : "");
if (ir->mask_keydown) {
/* bit set on keydown */
if (gpio & ir->mask_keydown) {
ir_input_keydown(&ir->input,&ir->ir,data,data);
} else {
ir_input_nokey(&ir->input,&ir->ir);
}
} else if (ir->mask_keyup) {
/* bit cleared on keydown */
if (0 == (gpio & ir->mask_keyup)) {
ir_input_keydown(&ir->input,&ir->ir,data,data);
} else {
ir_input_nokey(&ir->input,&ir->ir);
}
} else {
/* can't distinguish keydown/up :-/ */
ir_input_keydown(&ir->input,&ir->ir,data,data);
ir_input_nokey(&ir->input,&ir->ir);
}
}
static void ir_timer(unsigned long data)
{
struct cx88_IR *ir = (struct cx88_IR*)data;
schedule_work(&ir->work);
}
static void cx88_ir_work(void *data)
{
struct cx88_IR *ir = data;
unsigned long timeout;
cx88_ir_handle_key(ir);
timeout = jiffies + (ir->polling * HZ / 1000);
mod_timer(&ir->timer, timeout);
}
/* ---------------------------------------------------------------------- */
int cx88_ir_init(struct cx88_core *core, struct pci_dev *pci)
{
struct cx88_IR *ir;
IR_KEYTAB_TYPE *ir_codes = NULL;
int ir_type = IR_TYPE_OTHER;
ir = kmalloc(sizeof(*ir),GFP_KERNEL);
if (NULL == ir)
return -ENOMEM;
memset(ir,0,sizeof(*ir));
/* detect & configure */
switch (core->board) {
case CX88_BOARD_DNTV_LIVE_DVB_T:
ir_codes = ir_codes_dntv_live_dvb_t;
ir->gpio_addr = MO_GP1_IO;
ir->mask_keycode = 0x1f;
ir->mask_keyup = 0x60;
ir->polling = 50; // ms
break;
case CX88_BOARD_HAUPPAUGE:
case CX88_BOARD_HAUPPAUGE_DVB_T1:
ir_codes = ir_codes_hauppauge_new;
ir_type = IR_TYPE_RC5;
ir->sampling = 1;
break;
case CX88_BOARD_WINFAST2000XP_EXPERT:
ir_codes = ir_codes_winfast;
ir->gpio_addr = MO_GP0_IO;
ir->mask_keycode = 0x8f8;
ir->mask_keyup = 0x100;
ir->polling = 1; // ms
break;
case CX88_BOARD_IODATA_GVBCTV7E:
ir_codes = ir_codes_iodata_bctv7e;
ir->gpio_addr = MO_GP0_IO;
ir->mask_keycode = 0xfd;
ir->mask_keydown = 0x02;
ir->polling = 5; // ms
break;
}
if (NULL == ir_codes) {
kfree(ir);
return -ENODEV;
}
/* init input device */
snprintf(ir->name, sizeof(ir->name), "cx88 IR (%s)",
cx88_boards[core->board].name);
snprintf(ir->phys, sizeof(ir->phys), "pci-%s/ir0",
pci_name(pci));
ir_input_init(&ir->input, &ir->ir, ir_type, ir_codes);
ir->input.name = ir->name;
ir->input.phys = ir->phys;
ir->input.id.bustype = BUS_PCI;
ir->input.id.version = 1;
if (pci->subsystem_vendor) {
ir->input.id.vendor = pci->subsystem_vendor;
ir->input.id.product = pci->subsystem_device;
} else {
ir->input.id.vendor = pci->vendor;
ir->input.id.product = pci->device;
}
/* record handles to ourself */
ir->core = core;
core->ir = ir;
if (ir->polling) {
INIT_WORK(&ir->work, cx88_ir_work, ir);
init_timer(&ir->timer);
ir->timer.function = ir_timer;
ir->timer.data = (unsigned long)ir;
schedule_work(&ir->work);
}
if (ir->sampling) {
core->pci_irqmask |= (1<<18); // IR_SMP_INT
cx_write(MO_DDS_IO, 0xa80a80); // 4 kHz sample rate
cx_write(MO_DDSCFG_IO, 0x5); // enable
}
/* all done */
input_register_device(&ir->input);
printk("%s: registered IR remote control\n", core->name);
return 0;
}
int cx88_ir_fini(struct cx88_core *core)
{
struct cx88_IR *ir = core->ir;
/* skip detach on non attached boards */
if (NULL == ir)
return 0;
if (ir->polling) {
del_timer(&ir->timer);
flush_scheduled_work();
}
input_unregister_device(&ir->input);
kfree(ir);
/* done */
core->ir = NULL;
return 0;
}
/* ---------------------------------------------------------------------- */
void cx88_ir_irq(struct cx88_core *core)
{
struct cx88_IR *ir = core->ir;
u32 samples,rc5;
int i;
if (NULL == ir)
return;
if (!ir->sampling)
return;
samples = cx_read(MO_SAMPLE_IO);
if (0 != samples && 0xffffffff != samples) {
/* record sample data */
if (ir->scount < ARRAY_SIZE(ir->samples))
ir->samples[ir->scount++] = samples;
return;
}
if (!ir->scount) {
/* nothing to sample */
if (ir->ir.keypressed && time_after(jiffies,ir->release))
ir_input_nokey(&ir->input,&ir->ir);
return;
}
/* have a complete sample */
if (ir->scount < ARRAY_SIZE(ir->samples))
ir->samples[ir->scount++] = samples;
for (i = 0; i < ir->scount; i++)
ir->samples[i] = ~ir->samples[i];
if (ir_debug)
ir_dump_samples(ir->samples,ir->scount);
/* decode it */
switch (core->board) {
case CX88_BOARD_HAUPPAUGE:
case CX88_BOARD_HAUPPAUGE_DVB_T1:
rc5 = ir_decode_biphase(ir->samples,ir->scount,5,7);
ir_dprintk("biphase decoded: %x\n",rc5);
if ((rc5 & 0xfffff000) != 0x3000)
break;
ir_input_keydown(&ir->input, &ir->ir, rc5 & 0x3f, rc5);
ir->release = jiffies + msecs_to_jiffies(120);
break;
}
ir->scount = 0;
return;
}
/* ---------------------------------------------------------------------- */
MODULE_AUTHOR("Gerd Knorr, Pavel Machek, Chris Pascoe");
MODULE_DESCRIPTION("input driver for cx88 GPIO-based IR remote controls");
MODULE_LICENSE("GPL");
/*
* Local variables:
* c-basic-offset: 8
* End:
*/
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