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/*
* fusb302 usb phy driver for type-c and PD
*
* Copyright (C) 2015, 2016 Fairchild Semiconductor Corporation
*
* 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 3 of the License, or
* 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. Seee 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, see <http://www.gnu.org/licenses/>.
*
*/
#include "AlternateModes.h"
FSC_BOOL startDRPSource = FALSE;
extern FSC_BOOL g_Idle;
void SetStateAlternateUnattached(void)
{
#ifdef FSC_HAVE_DRP
if (PortType == USBTypeC_DRP) // If we are a DRP
{
SetStateAlternateUnattachedSink();
}
#endif // FSC_HAVE_DRP
#ifdef FSC_HAVE_ACCMODE
if ((PortType == USBTypeC_Sink) && (blnAccSupport)) // If we are a sink supporting accessories
{
#ifdef FSC_HAVE_DRP
SetStateAlternateDRP();
#endif // FSC_HAVE_DRP
}
#endif // FSC_HAVE_ACCMODE
#ifdef FSC_HAVE_SRC
if (PortType == USBTypeC_Source) // If we are strictly a Source
{
SetStateAlternateUnattachedSource();
}
#endif // FSC_HAVE_SRC
#ifdef FSC_HAVE_SNK
if (PortType == USBTypeC_Sink) // If we are strictly a Sink
{
SetStateAlternateUnattachedSink();
}
#endif // FSC_HAVE_SNK
}
void StateMachineAlternateUnattached(void)
{
#ifdef FSC_HAVE_DRP
if (PortType == USBTypeC_DRP) // If we are a DRP
{
StateMachineAlternateUnattachedSink();
}
#endif // FSC_HAVE_DRP
#ifdef FSC_HAVE_ACCMODE
if ((PortType == USBTypeC_Sink) && (blnAccSupport)) // If we are a sink supporting accessories
{
#ifdef FSC_HAVE_DRP
StateMachineAlternateDRP();
#endif // FSC_HAVE_DRP
}
#endif // FSC_HAVE_ACCMODE
#ifdef FSC_HAVE_SRC
if (PortType == USBTypeC_Source) // If we are strictly a Source
{
StateMachineAlternateUnattachedSource();
}
#endif // FSC_HAVE_SRC
#ifdef FSC_HAVE_SNK
if (PortType == USBTypeC_Sink) // If we are strictly a Sink
{
StateMachineAlternateUnattachedSink();
}
#endif // FSC_HAVE_SNK
}
#ifdef FSC_HAVE_DRP
void SetStateAlternateDRP(void)
{
#ifdef FSC_INTERRUPT_TRIGGERED
g_Idle = FALSE; // Run continuously (unmask all)
Registers.Mask.byte = 0x00;
DeviceWrite(regMask, 1, &Registers.Mask.byte);
Registers.MaskAdv.byte[0] = 0x00;
DeviceWrite(regMaska, 1, &Registers.MaskAdv.byte[0]);
Registers.MaskAdv.M_GCRCSENT = 0;
DeviceWrite(regMaskb, 1, &Registers.MaskAdv.byte[1]);
platform_enable_timer(TRUE);
#endif
platform_set_vbus_lvl_enable(VBUS_LVL_ALL, FALSE, FALSE); // Disable VBUS output
ConnState = Unattached; // Set the state machine variable to unattached
if((blnCCPinIsCC1 && startDRPSource) || (blnCCPinIsCC2 && (startDRPSource == FALSE)))
{
sourceOrSink = SOURCE; // This doesn't make sense for this state, so this will pertain to CC1
Registers.Switches.byte[0] = 0x46; // Enable Pullup1, Pulldown2, and Meas1
DeviceWrite(regSwitches0, 1, &Registers.Switches.byte[0]); // Commit the switch state
}
else
{
sourceOrSink = SINK; // This doesn't make sense for this state, so this will pertain to CC1
Registers.Switches.byte[0] = 0x89; // Enable Pullup2, Pulldown1, and Meas1
DeviceWrite(regSwitches0, 1, &Registers.Switches.byte[0]); // Commit the switch state
}
startDRPSource = FALSE;
Registers.Power.PWR = 0x7; // Enable everything except internal oscillator
DeviceWrite(regPower, 1, &Registers.Power.byte); // Commit the power state
updateSourceCurrent(); // Updates source current
USBPDDisable(TRUE); // Disable the USB PD state machine (no need to write Device again since we are doing it here)
SinkCurrent = utccNone;
resetDebounceVariables();
blnCCPinIsCC1 = FALSE; // Clear the CC1 pin flag
blnCCPinIsCC2 = FALSE; // Clear the CC2 pin flag
StateTimer = tAlternateDRPSwap;
PDDebounce = T_TIMER_DISABLE; // enable the 1st level debounce timer, not used in this state
CCDebounce = T_TIMER_DISABLE; // enable the 2nd level debounce timer, not used in this state
ToggleTimer = tDeviceToggle; // enable the toggle timer
OverPDDebounce = tPDDebounce; // enable PD filter timer
#ifdef FSC_DEBUG
WriteStateLog(&TypeCStateLog, ConnState, Timer_tms, Timer_S);
#endif // FSC_DEBUG
}
#endif // FSC_HAVE_DRP
#ifdef FSC_HAVE_DRP
void StateMachineAlternateDRP(void)
{
debounceCC();
if(StateTimer == 0)
{
AlternateDRPSwap();
StateTimer = tAlternateDRPSwap;
}
if((CC1TermPrevious >= CCTypeRdUSB) && (CC1TermPrevious <= CCTypeRd3p0) && (sourceOrSink == SOURCE))
{
blnCCPinIsCC1 = TRUE;
blnCCPinIsCC2 = FALSE;
#ifdef FSC_HAVE_ACCMODE
if ((PortType == USBTypeC_Sink) && (blnAccSupport)) // If we are configured as a sink and support accessories...
checkForAccessory(); // Go to the AttachWaitAcc state
else // Otherwise we must be configured as a source or DRP
#endif // FSC_HAVE_ACCMODE
SetStateAttachWaitSource();
}
// NOTE: Remember sourceOrSink refers to CC1 in this funky state - CC2 is opposite
else if((CC2TermPrevious >= CCTypeRdUSB) && (CC2TermPrevious <= CCTypeRd3p0) && (sourceOrSink == SINK))
{
blnCCPinIsCC1 = FALSE;
blnCCPinIsCC2 = TRUE;
#ifdef FSC_HAVE_ACCMODE
if ((PortType == USBTypeC_Sink) && (blnAccSupport)) // If we are configured as a sink and support accessories...
checkForAccessory(); // Go to the AttachWaitAcc state
else // Otherwise we must be configured as a source or DRP
#endif // FSC_HAVE_ACCMODE
SetStateAttachWaitSource();
}
else if((CC1TermPrevious >= CCTypeRdUSB) && (CC1TermPrevious <= CCTypeRd3p0) && (sourceOrSink == SINK))
{
blnCCPinIsCC1 = TRUE;
blnCCPinIsCC2 = FALSE;
SetStateAttachWaitSink();
}
// NOTE: Remember sourceOrSink refers to CC1 in this funky state - CC2 is opposite
else if((CC2TermPrevious >= CCTypeRdUSB) && (CC2TermPrevious <= CCTypeRd3p0) && (sourceOrSink == SOURCE))
{
blnCCPinIsCC1 = FALSE;
blnCCPinIsCC2 = TRUE;
SetStateAttachWaitSink();
}
}
#endif // FSC_HAVE_DRP
#ifdef FSC_HAVE_DRP
void AlternateDRPSwap(void)
{
if(sourceOrSink == SOURCE)
{
Registers.Switches.byte[0] = 0x89; // Enable Pullup2, Pulldown1, and Meas2
DeviceWrite(regSwitches0, 1, &Registers.Switches.byte[0]); // Commit the switch state
sourceOrSink = SINK;
}
else
{
Registers.Switches.byte[0] = 0x46; // Enable Pullup1, Pulldown2, and Meas1
DeviceWrite(regSwitches0, 1, &Registers.Switches.byte[0]); // Commit the switch state
sourceOrSink = SOURCE;
}
}
#endif // FSC_HAVE_DRP
#ifdef FSC_HAVE_DRP
void AlternateDRPSourceSinkSwap(void)
{
if(ConnState == Unattached)
{
if(Registers.Switches.MEAS_CC2 == 1) // CC2 is opposite in this state
{
if(sourceOrSink == SOURCE)
{
sourceOrSink = SINK;
}
else
{
sourceOrSink = SOURCE;
}
}
}
}
#endif // FSC_HAVE_DRP
#ifdef FSC_HAVE_SRC
void SetStateAlternateUnattachedSource(void)
{
#ifdef FSC_INTERRUPT_TRIGGERED
g_Idle = TRUE; // Idle until COMP or BC_LVL
Registers.Mask.byte = 0xFF;
Registers.Mask.M_COMP_CHNG = 0;
Registers.Mask.M_BC_LVL = 0;
DeviceWrite(regMask, 1, &Registers.Mask.byte);
Registers.MaskAdv.byte[0] = 0xFF;
DeviceWrite(regMaska, 1, &Registers.MaskAdv.byte[0]);
Registers.MaskAdv.M_GCRCSENT = 1;
DeviceWrite(regMaskb, 1, &Registers.MaskAdv.byte[1]);
platform_enable_timer(FALSE);
#endif
platform_set_vbus_lvl_enable(VBUS_LVL_ALL, FALSE, FALSE); // Disable VBUS output
ConnState = UnattachedSource; // Set the state machine variable to unattached
sourceOrSink = SOURCE;
Registers.Switches.byte[0] = 0xC4; // Enable both pull-ups and measure on CC1
Registers.Power.PWR = 0x7; // Enable everything except internal oscillator
DeviceWrite(regPower, 1, &Registers.Power.byte); // Commit the power state
DeviceWrite(regSwitches0, 1, &Registers.Switches.byte[0]); // Commit the switch state
USBPDDisable(TRUE); // Disable the USB PD state machine (no need to write Device again since we are doing it here)
SinkCurrent = utccNone;
resetDebounceVariables();
blnCCPinIsCC1 = FALSE; // Clear the CC1 pin flag
blnCCPinIsCC2 = FALSE; // Clear the CC2 pin flag
#ifdef FSC_HAVE_DRP
if (PortType == USBTypeC_DRP) // If we are a DRP
{
StateTimer = tAlternateDRPSwap; // Enable state timer for DRP toggle
}
else
#endif // FSC_HAVE_DRP
#ifdef FSC_HAVE_ACCMODE
if ((PortType == USBTypeC_Sink) && (blnAccSupport)) // ... or a sink supporting accessories
{
StateTimer = tAlternateDRPSwap; // Enable state timer for DRP toggle
}
else
#endif // FSC_HAVE_ACCMODE
{
StateTimer = T_TIMER_DISABLE; // Disable the state timer, not used in this state
}
PDDebounce = tPDDebounce; // enable the 1st level debounce timer, not used in this state
CCDebounce = tCCDebounce; // enable the 2nd level debounce timer, not used in this state
ToggleTimer = T_TIMER_DISABLE; // disable the toggle timer
DRPToggleTimer = T_TIMER_DISABLE; // Timer to switch from unattachedSrc to unattachedSnk in DRP
OverPDDebounce = T_TIMER_DISABLE; // enable PD filter timer
#ifdef FSC_DEBUG
WriteStateLog(&TypeCStateLog, ConnState, Timer_tms, Timer_S);
#endif // FSC_DEBUG
}
#endif // FSC_HAVE_SRC
#ifdef FSC_HAVE_SRC
void StateMachineAlternateUnattachedSource(void) // CC1 and CC2 are shorted, so we just look for CC1 < 2.6V for Ra/Rd and > 0.2V for no Ra
{
CCTermType previous;
if(Registers.Control.HOST_CUR != 0b11) // Set host current to 330uA if it is not by default
{
Registers.Control.HOST_CUR = 0b11;
DeviceWrite(regControl0, 1, &Registers.Control.byte[0]);
}
previous = AlternateDecodeCCTerminationSource(); // Get CC Termination Value
updateSourceCurrent(); // Returns host current to current current setting
#ifdef FSC_HAVE_ACCMODE
if(blnAccSupport)
{
if (previous == CCTypeRa)
{
blnCCPinIsCC1 = FALSE; // Setting both to false will have the next state figure it out
blnCCPinIsCC2 = FALSE;
SetStateAttachWaitSource();
return;
}
}
#endif // FSC_HAVE_ACCMODE
if ((previous == CCTypeRd3p0) || (previous == CCTypeRd1p5)) // If a CC pin is Rd
{
blnCCPinIsCC1 = FALSE; // Setting both to false will have the next state figure it out
blnCCPinIsCC2 = FALSE;
SetStateAttachWaitSource(); // Go to the Attached.Src state
}
else if(previous == CCTypeRdUSB) // Either Ra-Open or Rd-Ra
{
peekCC1Source(); // Connect if Rd on CC1
if((CC1TermPrevious == CCTypeRdUSB) || (CC1TermPrevious == CCTypeRd1p5) || (CC1TermPrevious == CCTypeRd3p0))
{
blnCCPinIsCC1 = FALSE;
blnCCPinIsCC2 = FALSE;
SetStateAttachWaitSource();
}
else
{
peekCC2Source(); // Else connect if Rd on CC2
if((CC2TermPrevious == CCTypeRdUSB) || (CC2TermPrevious == CCTypeRd1p5) || (CC2TermPrevious == CCTypeRd3p0))
{
blnCCPinIsCC1 = FALSE;
blnCCPinIsCC2 = FALSE;
SetStateAttachWaitSource();
}
}
}
else if (StateTimer == 0)
{
#ifdef FSC_HAVE_SNK
SetStateAlternateUnattachedSink();
#else
SetStateAlternateUnattachedSource();
#endif // FSC_HAVE_SNK
}
}
#endif // FSC_HAVE_SRC
#ifdef FSC_HAVE_SNK
void StateMachineAlternateUnattachedSink(void)
{
debounceCC();
if ((CC1TermPrevious >= CCTypeRdUSB) && (CC1TermPrevious < CCTypeUndefined) && ((CC2TermPrevious == CCTypeRa) || CC2TermPrevious == CCTypeOpen)) // If the CC1 pin is Rd for atleast tPDDebounce...
{
blnCCPinIsCC1 = TRUE; // The CC pin is CC1
blnCCPinIsCC2 = FALSE;
SetStateAttachWaitSink(); // Go to the Attached.Snk state
}
else if ((CC2TermPrevious >= CCTypeRdUSB) && (CC2TermPrevious < CCTypeUndefined) && ((CC1TermPrevious == CCTypeRa) || CC1TermPrevious == CCTypeOpen)) // If the CC2 pin is Rd for atleast tPDDebounce...
{
blnCCPinIsCC1 = FALSE; // The CC pin is CC2
blnCCPinIsCC2 = TRUE;
SetStateAttachWaitSink(); // Go to the Attached.Snk state
}
else if (StateTimer == 0)
{
#ifdef FSC_HAVE_SRC
SetStateAlternateUnattachedSource();
#else
SetStateAlternateUnattachedSink();
#endif // FSC_HAVE_SRC
}
}
#endif // FSC_HAVE_SNK
#ifdef FSC_HAVE_SNK
void SetStateAlternateUnattachedSink(void)
{
#ifdef FSC_INTERRUPT_TRIGGERED
g_Idle = FALSE; // run continuously
Registers.Mask.byte = 0x00;
DeviceWrite(regMask, 1, &Registers.Mask.byte);
Registers.MaskAdv.byte[0] = 0x00;
DeviceWrite(regMaska, 1, &Registers.MaskAdv.byte[0]);
Registers.MaskAdv.M_GCRCSENT = 0;
DeviceWrite(regMaskb, 1, &Registers.MaskAdv.byte[1]);
platform_enable_timer(TRUE);
#endif
platform_set_vbus_lvl_enable(VBUS_LVL_ALL, FALSE, FALSE); // Disable VBUS output
ConnState = Unattached; // Set the state machine variable to unattached
sourceOrSink = SINK;
Registers.Switches.byte[0] = 0x07; // Enable both pull-downs and measure on CC1
Registers.Power.PWR = 0x7; // Enable everything except internal oscillator
DeviceWrite(regPower, 1, &Registers.Power.byte); // Commit the power state
DeviceWrite(regSwitches0, 1, &Registers.Switches.byte[0]); // Commit the switch state
USBPDDisable(TRUE); // Disable the USB PD state machine (no need to write Device again since we are doing it here)
SinkCurrent = utccNone;
resetDebounceVariables();
blnCCPinIsCC1 = FALSE; // Clear the CC1 pin flag
blnCCPinIsCC2 = FALSE; // Clear the CC2 pin flag
#ifdef FSC_HAVE_DRP
if (PortType == USBTypeC_DRP) // If we are a DRP
{
StateTimer = tAlternateDRPSwap; // Enable state timer for DRP toggle
}
else
#endif // FSC_HAVE_DRP
#ifdef FSC_HAVE_ACCMODE
if ((PortType == USBTypeC_Sink) && (blnAccSupport)) // ... or a sink supporting accessories
{
StateTimer = tAlternateDRPSwap; // Enable state timer for DRP toggle
}
else
#endif // FSC_HAVE_ACCMODE
{
StateTimer = T_TIMER_DISABLE; // Disable the state timer, not used in this state
}
PDDebounce = tPDDebounce; // enable the 1st level debounce timer, not used in this state
CCDebounce = tCCDebounce; // enable the 2nd level debounce timer, not used in this state
ToggleTimer = tDeviceToggle; // disable the toggle timer
DRPToggleTimer = tDeviceToggle; // Timer to switch from unattachedSrc to unattachedSnk in DRP
OverPDDebounce = T_TIMER_DISABLE; // enable PD filter timer
#ifdef FSC_DEBUG
WriteStateLog(&TypeCStateLog, ConnState, Timer_tms, Timer_S);
#endif // FSC_DEBUG
}
#endif // FSC_HAVE_SNK
#ifdef FSC_HAVE_ACCMODE
void SetStateAlternateAudioAccessory(void)
{
#ifdef FSC_INTERRUPT_TRIGGERED
g_Idle = FALSE; // Run continuously (unmask all)
Registers.Mask.byte = 0x00;
DeviceWrite(regMask, 1, &Registers.Mask.byte);
Registers.MaskAdv.byte[0] = 0x00;
DeviceWrite(regMaska, 1, &Registers.MaskAdv.byte[0]);
Registers.MaskAdv.M_GCRCSENT = 0;
DeviceWrite(regMaskb, 1, &Registers.MaskAdv.byte[1]);
platform_enable_timer(TRUE);
#endif
platform_set_vbus_lvl_enable(VBUS_LVL_ALL, FALSE, FALSE); // Disable VBUS output
ConnState = AudioAccessory; // Set the state machine variable to Audio.Accessory
sourceOrSink = SOURCE;
Registers.Power.PWR = 0x7; // Enable everything except internal oscillator
DeviceWrite(regPower, 1, &Registers.Power.byte); // Commit the power state
Registers.Control.HOST_CUR = 0b11; // Set host current to 330uA
DeviceWrite(regControl0, 1, &Registers.Control.byte[0]); // Commit host current
Registers.Switches.byte[0] = 0xC4; // Enable both pull-ups and measure on CC1
DeviceWrite(regSwitches0, 1, &Registers.Switches.byte[0]); // Commit the switch state
SinkCurrent = utccNone; // Not used in accessories
OverPDDebounce = T_TIMER_DISABLE; // Disable PD filter timer
StateTimer = T_TIMER_DISABLE; // Disable the state timer, not used in this state
PDDebounce = tCCDebounce; // Once in this state, we are waiting for the lines to be stable for tCCDebounce before changing states
CCDebounce = T_TIMER_DISABLE; // Disable the 2nd level debouncing initially to force completion of a 1st level debouncing
ToggleTimer = T_TIMER_DISABLE; // Once we are in the audio.accessory state, we are going to stop toggling and only monitor CC1
#ifdef FSC_DEBUG
WriteStateLog(&TypeCStateLog, ConnState, Timer_tms, Timer_S);
#endif // FSC_DEBUG
}
#endif // FSC_HAVE_ACCMODE
#ifdef FSC_HAVE_SRC
CCTermType AlternateDecodeCCTerminationSource(void)
{
CCTermType Termination = CCTypeUndefined; // By default set it to undefined
Registers.Measure.MDAC = MDAC_2P058V; // Set up DAC threshold to 2.05V
DeviceWrite(regMeasure, 1, &Registers.Measure.byte); // Commit the DAC threshold
platform_delay_10us(25); // Delay to allow measurement to settle
DeviceRead(regStatus0, 1, &Registers.Status.byte[4]);
if (Registers.Status.COMP == 1)
{
Termination = CCTypeOpen;
return Termination;
}
else if(Registers.Status.BC_LVL == 0)
{
Termination = CCTypeRa;
}
else if(Registers.Status.BC_LVL == 3)
{
Termination = CCTypeRd3p0;
}
else if(Registers.Status.BC_LVL == 2)
{
Termination = CCTypeRd1p5;
}
else
{
Termination = CCTypeRdUSB;
}
return Termination; // Return the termination type
}
#endif // FSC_HAVE_SRC
|
