cregit-Linux how code gets into the kernel

Release 4.7 drivers/media/pci/ttpci/av7110_ir.c

/*
 * Driver for the remote control of SAA7146 based AV7110 cards
 *
 * Copyright (C) 1999-2003 Holger Waechtler <holger@convergence.de>
 * Copyright (C) 2003-2007 Oliver Endriss <o.endriss@gmx.de>
 *
 * 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.
 * Or, point your browser to http://www.gnu.org/copyleft/gpl.html
 *
 */


#include <linux/types.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/proc_fs.h>
#include <linux/kernel.h>
#include <linux/bitops.h>

#include "av7110.h"
#include "av7110_hw.h"



#define AV_CNT		4


#define IR_RC5		0

#define IR_RCMM		1

#define IR_RC5_EXT	2 
/* internal only */


#define IR_ALL		0xffffffff


#define UP_TIMEOUT	(HZ*7/25)


/* Note: enable ir debugging by or'ing debug with 16 */


static int ir_protocol[AV_CNT] = { IR_RCMM, IR_RCMM, IR_RCMM, IR_RCMM};
module_param_array(ir_protocol, int, NULL, 0644);
MODULE_PARM_DESC(ir_protocol, "Infrared protocol: 0 RC5, 1 RCMM (default)");


static int ir_inversion[AV_CNT];
module_param_array(ir_inversion, int, NULL, 0644);
MODULE_PARM_DESC(ir_inversion, "Inversion of infrared signal: 0 not inverted (default), 1 inverted");


static uint ir_device_mask[AV_CNT] = { IR_ALL, IR_ALL, IR_ALL, IR_ALL };
module_param_array(ir_device_mask, uint, NULL, 0644);
MODULE_PARM_DESC(ir_device_mask, "Bitmask of infrared devices: bit 0..31 = device 0..31 (default: all)");



static int av_cnt;

static struct av7110 *av_list[AV_CNT];


static u16 default_key_map [256] = {
	KEY_0, KEY_1, KEY_2, KEY_3, KEY_4, KEY_5, KEY_6, KEY_7,
	KEY_8, KEY_9, KEY_BACK, 0, KEY_POWER, KEY_MUTE, 0, KEY_INFO,
	KEY_VOLUMEUP, KEY_VOLUMEDOWN, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
	KEY_CHANNELUP, KEY_CHANNELDOWN, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, KEY_TEXT, 0, 0, KEY_TV, 0, 0, 0, 0, 0, KEY_SETUP, 0, 0,
	0, 0, 0, KEY_SUBTITLE, 0, 0, KEY_LANGUAGE, 0,
	KEY_RADIO, 0, 0, 0, 0, KEY_EXIT, 0, 0,
	KEY_UP, KEY_DOWN, KEY_LEFT, KEY_RIGHT, KEY_OK, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, KEY_RED, KEY_GREEN, KEY_YELLOW,
	KEY_BLUE, 0, 0, 0, 0, 0, 0, 0, KEY_MENU, KEY_LIST, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, KEY_UP, KEY_UP, KEY_DOWN, KEY_DOWN,
	0, 0, 0, 0, KEY_EPG, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, KEY_VCR
};


/* key-up timer */

static void av7110_emit_keyup(unsigned long parm) { struct infrared *ir = (struct infrared *) parm; if (!ir || !test_bit(ir->last_key, ir->input_dev->key)) return; input_report_key(ir->input_dev, ir->last_key, 0); input_sync(ir->input_dev); }

Contributors

PersonTokensPropCommitsCommitProp
alan coxalan cox2845.16%120.00%
oliver endrissoliver endriss2641.94%120.00%
dmitry torokhovdmitry torokhov711.29%240.00%
michael hunoldmichael hunold11.61%120.00%
Total62100.00%5100.00%

/* tasklet */
static void av7110_emit_key(unsigned long parm) { struct infrared *ir = (struct infrared *) parm; u32 ircom = ir->ir_command; u8 data; u8 addr; u16 toggle; u16 keycode; /* extract device address and data */ switch (ir->protocol) { case IR_RC5: /* RC5: 5 bits device address, 6 bits data */ data = ircom & 0x3f; addr = (ircom >> 6) & 0x1f; toggle = ircom & 0x0800; break; case IR_RCMM: /* RCMM: ? bits device address, ? bits data */ data = ircom & 0xff; addr = (ircom >> 8) & 0x1f; toggle = ircom & 0x8000; break; case IR_RC5_EXT: /* extended RC5: 5 bits device address, 7 bits data */ data = ircom & 0x3f; addr = (ircom >> 6) & 0x1f; /* invert 7th data bit for backward compatibility with RC5 keymaps */ if (!(ircom & 0x1000)) data |= 0x40; toggle = ircom & 0x0800; break; default: printk("%s invalid protocol %x\n", __func__, ir->protocol); return; } input_event(ir->input_dev, EV_MSC, MSC_RAW, (addr << 16) | data); input_event(ir->input_dev, EV_MSC, MSC_SCAN, data); keycode = ir->key_map[data]; dprintk(16, "%s: code %08x -> addr %i data 0x%02x -> keycode %i\n", __func__, ircom, addr, data, keycode); /* check device address */ if (!(ir->device_mask & (1 << addr))) return; if (!keycode) { printk ("%s: code %08x -> addr %i data 0x%02x -> unknown key!\n", __func__, ircom, addr, data); return; } if (timer_pending(&ir->keyup_timer)) { del_timer(&ir->keyup_timer); if (ir->last_key != keycode || toggle != ir->last_toggle) { ir->delay_timer_finished = 0; input_event(ir->input_dev, EV_KEY, ir->last_key, 0); input_event(ir->input_dev, EV_KEY, keycode, 1); input_sync(ir->input_dev); } else if (ir->delay_timer_finished) { input_event(ir->input_dev, EV_KEY, keycode, 2); input_sync(ir->input_dev); } } else { ir->delay_timer_finished = 0; input_event(ir->input_dev, EV_KEY, keycode, 1); input_sync(ir->input_dev); } ir->last_key = keycode; ir->last_toggle = toggle; ir->keyup_timer.expires = jiffies + UP_TIMEOUT; add_timer(&ir->keyup_timer); }

Contributors

PersonTokensPropCommitsCommitProp
oliver endrissoliver endriss20548.93%330.00%
alan coxalan cox9622.91%110.00%
michael hunoldmichael hunold8119.33%330.00%
dmitry torokhovdmitry torokhov194.53%110.00%
noone important at sneakemail.comnoone important at sneakemail.com153.58%110.00%
harvey harrisonharvey harrison30.72%110.00%
Total419100.00%10100.00%

/* register with input layer */
static void input_register_keys(struct infrared *ir) { int i; set_bit(EV_KEY, ir->input_dev->evbit); set_bit(EV_REP, ir->input_dev->evbit); set_bit(EV_MSC, ir->input_dev->evbit); set_bit(MSC_RAW, ir->input_dev->mscbit); set_bit(MSC_SCAN, ir->input_dev->mscbit); memset(ir->input_dev->keybit, 0, sizeof(ir->input_dev->keybit)); for (i = 0; i < ARRAY_SIZE(ir->key_map); i++) { if (ir->key_map[i] > KEY_MAX) ir->key_map[i] = 0; else if (ir->key_map[i] > KEY_RESERVED) set_bit(ir->key_map[i], ir->input_dev->keybit); } ir->input_dev->keycode = ir->key_map; ir->input_dev->keycodesize = sizeof(ir->key_map[0]); ir->input_dev->keycodemax = ARRAY_SIZE(ir->key_map); }

Contributors

PersonTokensPropCommitsCommitProp
oliver endrissoliver endriss11458.16%240.00%
alan coxalan cox7739.29%120.00%
dmitry torokhovdmitry torokhov42.04%120.00%
michael hunoldmichael hunold10.51%120.00%
Total196100.00%5100.00%

/* called by the input driver after rep[REP_DELAY] ms */
static void input_repeat_key(unsigned long parm) { struct infrared *ir = (struct infrared *) parm; ir->delay_timer_finished = 1; }

Contributors

PersonTokensPropCommitsCommitProp
oliver endrissoliver endriss1553.57%133.33%
michael hunoldmichael hunold932.14%133.33%
noone important at sneakemail.comnoone important at sneakemail.com414.29%133.33%
Total28100.00%3100.00%

/* check for configuration changes */
int av7110_check_ir_config(struct av7110 *av7110, int force) { int i; int modified = force; int ret = -ENODEV; for (i = 0; i < av_cnt; i++) if (av7110 == av_list[i]) break; if (i < av_cnt && av7110) { if ((av7110->ir.protocol & 1) != ir_protocol[i] || av7110->ir.inversion != ir_inversion[i]) modified = true; if (modified) { /* protocol */ if (ir_protocol[i]) { ir_protocol[i] = 1; av7110->ir.protocol = IR_RCMM; av7110->ir.ir_config = 0x0001; } else if (FW_VERSION(av7110->arm_app) >= 0x2620) { av7110->ir.protocol = IR_RC5_EXT; av7110->ir.ir_config = 0x0002; } else { av7110->ir.protocol = IR_RC5; av7110->ir.ir_config = 0x0000; } /* inversion */ if (ir_inversion[i]) { ir_inversion[i] = 1; av7110->ir.ir_config |= 0x8000; } av7110->ir.inversion = ir_inversion[i]; /* update ARM */ ret = av7110_fw_cmd(av7110, COMTYPE_PIDFILTER, SetIR, 1, av7110->ir.ir_config); } else ret = 0; /* address */ if (av7110->ir.device_mask != ir_device_mask[i]) av7110->ir.device_mask = ir_device_mask[i]; } return ret; }

Contributors

PersonTokensPropCommitsCommitProp
oliver endrissoliver endriss22483.27%150.00%
adrian bunkadrian bunk4516.73%150.00%
Total269100.00%2100.00%

/* /proc/av7110_ir interface */
static ssize_t av7110_ir_proc_write(struct file *file, const char __user *buffer, size_t count, loff_t *pos) { char *page; u32 ir_config; int size = sizeof ir_config + sizeof av_list[0]->ir.key_map; int i; if (count < size) return -EINVAL; page = vmalloc(size); if (!page) return -ENOMEM; if (copy_from_user(page, buffer, size)) { vfree(page); return -EFAULT; } memcpy(&ir_config, page, sizeof ir_config); for (i = 0; i < av_cnt; i++) { /* keymap */ memcpy(av_list[i]->ir.key_map, page + sizeof ir_config, sizeof(av_list[i]->ir.key_map)); /* protocol, inversion, address */ ir_protocol[i] = ir_config & 0x0001; ir_inversion[i] = ir_config & 0x8000 ? 1 : 0; if (ir_config & 0x4000) ir_device_mask[i] = 1 << ((ir_config >> 16) & 0x1f); else ir_device_mask[i] = IR_ALL; /* update configuration */ av7110_check_ir_config(av_list[i], false); input_register_keys(&av_list[i]->ir); } vfree(page); return count; }

Contributors

PersonTokensPropCommitsCommitProp
oliver endrissoliver endriss12853.78%225.00%
michael hunoldmichael hunold5221.85%225.00%
alan coxalan cox5121.43%112.50%
alexey dobriyanalexey dobriyan52.10%112.50%
al viroal viro10.42%112.50%
andrew mortonandrew morton10.42%112.50%
Total238100.00%8100.00%

static const struct file_operations av7110_ir_proc_fops = { .owner = THIS_MODULE, .write = av7110_ir_proc_write, .llseek = noop_llseek, }; /* interrupt handler */
static void ir_handler(struct av7110 *av7110, u32 ircom) { dprintk(4, "ir command = %08x\n", ircom); av7110->ir.ir_command = ircom; tasklet_schedule(&av7110->ir.ir_tasklet); }

Contributors

PersonTokensPropCommitsCommitProp
oliver endrissoliver endriss41100.00%2100.00%
Total41100.00%2100.00%


int av7110_ir_init(struct av7110 *av7110) { struct input_dev *input_dev; static struct proc_dir_entry *e; int err; if (av_cnt >= ARRAY_SIZE(av_list)) return -ENOSPC; av_list[av_cnt++] = av7110; av7110_check_ir_config(av7110, true); init_timer(&av7110->ir.keyup_timer); av7110->ir.keyup_timer.function = av7110_emit_keyup; av7110->ir.keyup_timer.data = (unsigned long) &av7110->ir; input_dev = input_allocate_device(); if (!input_dev) return -ENOMEM; av7110->ir.input_dev = input_dev; snprintf(av7110->ir.input_phys, sizeof(av7110->ir.input_phys), "pci-%s/ir0", pci_name(av7110->dev->pci)); input_dev->name = "DVB on-card IR receiver"; input_dev->phys = av7110->ir.input_phys; input_dev->id.bustype = BUS_PCI; input_dev->id.version = 2; if (av7110->dev->pci->subsystem_vendor) { input_dev->id.vendor = av7110->dev->pci->subsystem_vendor; input_dev->id.product = av7110->dev->pci->subsystem_device; } else { input_dev->id.vendor = av7110->dev->pci->vendor; input_dev->id.product = av7110->dev->pci->device; } input_dev->dev.parent = &av7110->dev->pci->dev; /* initial keymap */ memcpy(av7110->ir.key_map, default_key_map, sizeof av7110->ir.key_map); input_register_keys(&av7110->ir); err = input_register_device(input_dev); if (err) { input_free_device(input_dev); return err; } input_dev->timer.function = input_repeat_key; input_dev->timer.data = (unsigned long) &av7110->ir; if (av_cnt == 1) { e = proc_create("av7110_ir", S_IWUSR, NULL, &av7110_ir_proc_fops); if (e) proc_set_size(e, 4 + 256 * sizeof(u16)); } tasklet_init(&av7110->ir.ir_tasklet, av7110_emit_key, (unsigned long) &av7110->ir); av7110->ir.ir_handler = ir_handler; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
oliver endrissoliver endriss14335.66%321.43%
matthias schwarzottmatthias schwarzott12631.42%17.14%
alan coxalan cox5914.71%17.14%
dmitry torokhovdmitry torokhov399.73%321.43%
johannes stezenbachjohannes stezenbach133.24%214.29%
michael hunoldmichael hunold102.49%17.14%
david howellsdavid howells41.00%17.14%
alexey dobriyanalexey dobriyan41.00%17.14%
ahmed s. darwishahmed s. darwish30.75%17.14%
Total401100.00%14100.00%


void av7110_ir_exit(struct av7110 *av7110) { int i; if (av_cnt == 0) return; del_timer_sync(&av7110->ir.keyup_timer); av7110->ir.ir_handler = NULL; tasklet_kill(&av7110->ir.ir_tasklet); for (i = 0; i < av_cnt; i++) if (av_list[i] == av7110) { av_list[i] = av_list[av_cnt-1]; av_list[av_cnt-1] = NULL; break; } if (av_cnt == 1) remove_proc_entry("av7110_ir", NULL); input_unregister_device(av7110->ir.input_dev); av_cnt--; }

Contributors

PersonTokensPropCommitsCommitProp
oliver endrissoliver endriss9478.99%250.00%
alan coxalan cox1815.13%125.00%
johannes stezenbachjohannes stezenbach75.88%125.00%
Total119100.00%4100.00%

//MODULE_AUTHOR("Holger Waechtler <holger@convergence.de>, Oliver Endriss <o.endriss@gmx.de>"); //MODULE_LICENSE("GPL");

Overall Contributors

PersonTokensPropCommitsCommitProp
oliver endrissoliver endriss112345.19%416.00%
alan coxalan cox86334.73%14.00%
michael hunoldmichael hunold1636.56%416.00%
matthias schwarzottmatthias schwarzott1285.15%14.00%
dmitry torokhovdmitry torokhov692.78%312.00%
adrian bunkadrian bunk451.81%14.00%
alexey dobriyanalexey dobriyan271.09%14.00%
johannes stezenbachjohannes stezenbach230.93%28.00%
noone important at sneakemail.comnoone important at sneakemail.com210.85%14.00%
ahmed s. darwishahmed s. darwish60.24%14.00%
arnd bergmannarnd bergmann50.20%14.00%
david howellsdavid howells40.16%14.00%
harvey harrisonharvey harrison30.12%14.00%
andrew mortonandrew morton30.12%14.00%
al viroal viro10.04%14.00%
jiri slabyjiri slaby10.04%14.00%
Total2485100.00%25100.00%
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