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943 lines
23 KiB
943 lines
23 KiB
// 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 <[email protected]> |
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// Markus Rechberger <[email protected]> |
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// Mauro Carvalho Chehab <[email protected]> |
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// Sascha Sommer <[email protected]> |
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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/usb/input.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 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 = ir_nec_bytes_to_scancode(msg[1], msg[2], msg[3], msg[4], |
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&poll_result->protocol); |
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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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|
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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: |
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case CHIP_ID_EM28178: |
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return em2874_ir_change_protocol(rc_dev, rc_proto); |
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default: |
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dev_err(&ir->dev->intf->dev, |
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"Unrecognized em28xx chip id 0x%02x: IR not supported\n", |
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dev->chip_id); |
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return -EINVAL; |
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} |
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} |
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|
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static int em28xx_probe_i2c_ir(struct em28xx *dev) |
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{ |
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int i = 0; |
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/* |
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* Leadtek winfast tv USBII deluxe can find a non working IR-device |
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* at address 0x18, so if that address is needed for another board in |
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* the future, please put it after 0x1f. |
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*/ |
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static const unsigned short addr_list[] = { |
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0x1f, 0x30, 0x47, I2C_CLIENT_END |
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}; |
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|
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while (addr_list[i] != I2C_CLIENT_END) { |
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if (i2c_probe_func_quick_read(&dev->i2c_adap[dev->def_i2c_bus], |
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addr_list[i]) == 1) |
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return addr_list[i]; |
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i++; |
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} |
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|
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return -ENODEV; |
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} |
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|
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/* |
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* Handle buttons |
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*/ |
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|
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static void em28xx_query_buttons(struct work_struct *work) |
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{ |
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struct em28xx *dev = |
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container_of(work, struct em28xx, buttons_query_work.work); |
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u8 i, j; |
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int regval; |
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bool is_pressed, was_pressed; |
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const struct em28xx_led *led; |
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|
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/* Poll and evaluate all addresses */ |
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for (i = 0; i < dev->num_button_polling_addresses; i++) { |
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/* Read value from register */ |
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regval = em28xx_read_reg(dev, dev->button_polling_addresses[i]); |
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if (regval < 0) |
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continue; |
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/* Check states of the buttons and act */ |
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j = 0; |
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while (dev->board.buttons[j].role >= 0 && |
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dev->board.buttons[j].role < EM28XX_NUM_BUTTON_ROLES) { |
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const struct em28xx_button *button; |
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|
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button = &dev->board.buttons[j]; |
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|
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/* Check if button uses the current address */ |
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if (button->reg_r != dev->button_polling_addresses[i]) { |
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j++; |
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continue; |
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} |
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/* Determine if button is and was pressed last time */ |
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is_pressed = regval & button->mask; |
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was_pressed = dev->button_polling_last_values[i] |
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& button->mask; |
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if (button->inverted) { |
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is_pressed = !is_pressed; |
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was_pressed = !was_pressed; |
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} |
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/* Clear button state (if needed) */ |
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if (is_pressed && button->reg_clearing) |
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em28xx_write_reg(dev, button->reg_clearing, |
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(~regval & button->mask) |
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| (regval & ~button->mask)); |
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/* Handle button state */ |
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if (!is_pressed || was_pressed) { |
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j++; |
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continue; |
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} |
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switch (button->role) { |
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case EM28XX_BUTTON_SNAPSHOT: |
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/* Emulate the keypress */ |
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input_report_key(dev->sbutton_input_dev, |
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EM28XX_SNAPSHOT_KEY, 1); |
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/* Unpress the key */ |
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input_report_key(dev->sbutton_input_dev, |
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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; |
|
usb_to_input_id(udev, &input_dev->id); |
|
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"); |
|
err = -ENODEV; |
|
goto ref_put; |
|
} |
|
} |
|
|
|
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) |
|
goto ref_put; |
|
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 */ |
|
|
|
usb_make_path(udev, ir->phys, sizeof(ir->phys)); |
|
strlcat(ir->phys, "/input0", sizeof(ir->phys)); |
|
|
|
rc->device_name = em28xx_boards[dev->model].name; |
|
rc->input_phys = ir->phys; |
|
usb_to_input_id(udev, &rc->input_id); |
|
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); |
|
ref_put: |
|
em28xx_shutdown_buttons(dev); |
|
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);
|
|
|