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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2002 by Alan Korr & Nick Robinson
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
/* Lingo 0x01: Microphone Lingo
*/
#include "iap-core.h"
#include "iap-lingo.h"
/*
* This macro is meant to be used inside an IAP mode message handler.
* It is passed the expected minimum length of the message buffer.
* If the buffer does not have the required lenght an ACK
* packet with a Bad Parameter error is generated.
*/
#define CHECKLEN(x) do { \
if (len < (x)) { \
cmd_ack(cmd, IAP_ACK_BAD_PARAM); \
return; \
}} while(0)
/* Check for authenticated state, and return an ACK Not
* Authenticated on failure.
*/
#define CHECKAUTH do { \
if (!DEVICE_AUTHENTICATED) { \
cmd_ack(cmd, IAP_ACK_NO_AUTHEN); \
return; \
}} while(0)
static void cmd_ack(const unsigned char cmd, const unsigned char status)
{
IAP_TX_INIT(0x03, 0x00);
IAP_TX_PUT(status);
IAP_TX_PUT(cmd);
iap_send_tx();
}
/* returns record status */
bool iap_record(bool onoff)
{
if (!DEVICE_LINGO_SUPPORTED(0x01))
return false;
/* iPodModeChange */
IAP_TX_INIT(0x01, 0x06);
IAP_TX_PUT(onoff ? 0x00 : 0x01);
iap_send_tx();
return onoff;
}
void iap_handlepkt_mode1(const unsigned int len, const unsigned char *buf)
{
unsigned int cmd = buf[1];
/* Lingo 0x04 commands are at least 4 bytes in length */
CHECKLEN(4);
/* Lingo 0x01 must have been negotiated */
if (!DEVICE_LINGO_SUPPORTED(0x01)) {
cmd_ack(cmd, IAP_ACK_BAD_PARAM);
return;
}
/* Authentication required for all commands */
CHECKAUTH;
switch (cmd)
{
/* BeginRecord (0x00) Deprecated
*
* Sent from the iPod to the device
*/
/* EndRecord (0x01) Deprecated
*
* Sent from the iPod to the device
*/
/* BeginPlayback (0x02) Deprecated
*
* Sent from the iPod to the device
*/
/* EndPlayback (0x03) Deprecated
*
* Sent from the iPod to the device
*/
/* ACK (0x04)
*
* The device sends an ACK response when a command
* that does not return any data has completed.
*
* Packet format (offset in buf[]: Description)
* 0x00: Lingo ID: Microphone Lingo, always 0x01
* 0x01: Command, always 0x04
* 0x02: The command result status
* 0x03: The ID of the command for which the
* response is being sent
*
* Returns: (none)
*/
case 0x04:
#ifdef LOGF_ENABLE
if (buf[2] != 0x00)
logf("iap: Mode1 Command ACK error: "
"0x%02x 0x%02x", buf[2], buf[3]);
#endif
break;
/* GetDevAck (0x05)
*
* Sent from the iPod to the device
*/
/* iPodModeChange (0x06)
*
* Sent from the iPod to the device
*/
/* GetDevCaps (0x07)
*
* Sent from the iPod to the device
*/
/* RetDevCaps (0x08)
*
* The microphone device returns the payload
* indicating which capabilities it supports.
*
* Packet format (offset in buf[]: Description)
* 0x00: Lingo ID: Microphone Lingo, always 0x01
* 0x01: Command, always 0x08
* 0x02: Device capabilities (bits 31:24)
* 0x03: Device capabilities (bits 23:16)
* 0x04: Device capabilities (bits 15:8)
* 0x05: Device capabilities (bits 7:0)
*
* Returns:
* SetDevCtrl, sets stereo line input when supported
*/
case 0x08:
CHECKLEN(6);
if ((buf[5] & 3) == 3) {
/* SetDevCtrl, set stereo line-in */
IAP_TX_INIT(0x01, 0x0B);
IAP_TX_PUT(0x01);
IAP_TX_PUT(0x01);
iap_send_tx();
}
/* TODO?: configure recording level/limiter controls
when supported by the device */
break;
/* GetDevCtrl (0x09)
*
* Sent from the iPod to the device
*/
/* RetDevCaps (0x0A)
*
* The device returns the current control state
* for the specified control type.
*
* Packet format (offset in buf[]: Description)
* 0x00: Lingo ID: Microphone Lingo, always 0x01
* 0x01: Command, always 0x0A
* 0x02: The control type
* 0x03: The control data
*/
case 0x0A:
switch (buf[2])
{
case 0x01: /* stereo/mono line-in control */
case 0x02: /* recording level control */
case 0x03: /* recording level limiter control */
break;
}
break;
/* SetDevCtrl (0x0B)
*
* Sent from the iPod to the device
*/
/* The default response is IAP_ACK_BAD_PARAM */
default:
{
#ifdef LOGF_ENABLE
logf("iap: Unsupported Mode1 Command");
#endif
cmd_ack(cmd, IAP_ACK_BAD_PARAM);
break;
}
}
}
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