emu_utilities.c

51 56546fdfffffffffffffffffffff34

/*==================================================================================================
                                                                               
    Module Name:  emu_utilities.c

    General Description: This file provides utility function needed by the EMU common algorithm.

====================================================================================================
                               Motorola Confidential Proprietary
                        Template ID and version: IL93-TMP-01-0106  Version 1.20
                        (c) Copyright Motorola 2006, All Rights Reserved
  

Revision History:
                            Modification     Tracking
Author (core ID)                Date          Number     Description of Changes
-------------------------   ------------    ----------   -------------------------------------------
Jason Knopsnyder - w19069    05-Sep-2006    LIBjj66952   Use BOOST instead of BPLUS to power VUSB

Jason Knopsnyder - w19069    05-Apr-2006    LIBii35566   -Fix PPD audio xcvr state
                                                         -Set 1.5K pullup when FSENB is set
                                                         -Fix compiler warnings

Jason Knopsnyder - w19069    15-Feb-2006    LIBhh92145   Initial creation

Portability: This module should is and shall be kept portable across all Motorola compilers and
             platforms.


====================================================================================================
                                        INCLUDE FILES
==================================================================================================*/
                 
#include "../../ghdr/emu_glue_api.h"
#include "../hdr/emu_algorithm.h"

/*==================================================================================================
                          LOCAL TYPEDEFS (STRUCTURES, UNIONS, ENUMS)
==================================================================================================*/

/*==================================================================================================
                                 LOCAL FUNCTION PROTOTYPES
==================================================================================================*/

/*==================================================================================================
                                     LOCAL CONSTANTS
==================================================================================================*/

/* Voltage supplied to the USB transceiver in mV */
#define EMU_VUSB_OUT_3_3V               3300 
#define EMU_VUSB_OUT_2_775V             2775

/*==================================================================================================
                                        LOCAL MACROS
==================================================================================================*/

/*==================================================================================================
                                      LOCAL VARIABLES
==================================================================================================*/

/*==================================================================================================
                                     GLOBAL VARIABLES
==================================================================================================*/

/*==================================================================================================
                                     LOCAL FUNCTIONS
==================================================================================================*/

/*==================================================================================================
                                       GLOBAL FUNCTIONS
==================================================================================================*/

/*==================================================================================================
FUNCTION:
   emu_set_transceiver_state
   
DESCRIPTION: Title
   This function is used to configure the transceiver, which includes
   setting the state of USB suspend bit, enabling/disabling the transceiver,
   setting the VUSB input source, setting the VUSB output voltage and setting
   the state of the VUSB regulator

ARGUMENTS PASSED:
   state - The desired transceiver state
    
RETURN VALUE:
   None

PRE-CONDITIONS:
   None

POST-CONDITIONS:
   None

IMPORTANT NOTES:
   NOTE: BPLUS is not guaranteed to be available on all platforms so VINBUS must be used instead.
   
==================================================================================================*/
void
emu_set_transceiver_state(EMU_XCVR_STATE_T state)
{
    static const struct
    {
        unsigned long usb_suspend       : 1;
        unsigned long xcvr_enable       : 1;
        unsigned long vusb_enable       : 1;
        unsigned long vusb_input_source : 2;
        unsigned long vusb_voltage      : 12;
    } transceiver_config_table[EMU_XCVR_STATE__NUM] =
    {
        /*Transeiver State               USBS XEN VUEN VUSB INPUT SOURCE   VUSB VOLTAGE     */
        /*EMU_XCVR_STATE_OFF         */ {1,   0,  1,   EMU_VUSB_IN_VINBUS, EMU_VUSB_OUT_3_3V},
        /*EMU_XCVR_STATE_PPD_IDENTIFY*/ {1,   0,  1,   EMU_VUSB_IN_VINBUS, EMU_VUSB_OUT_3_3V},
        /*EMU_XCVR_STATE_SPD_IDENTIFY*/ {1,   0,  1,   EMU_VUSB_IN_VBUS,   EMU_VUSB_OUT_3_3V},
        /*EMU_XCVR_STATE_PPD         */ {1,   0,  1,   EMU_VUSB_IN_VINBUS, EMU_VUSB_OUT_3_3V},
        /*EMU_XCVR_STATE_PPD_AUDIO   */ {1,   1,  1,   EMU_VUSB_IN_VINBUS, EMU_VUSB_OUT_3_3V},
        /*EMU_XCVR_STATE_SPD         */ {1,   0,  1,   EMU_VUSB_IN_VBUS,   EMU_VUSB_OUT_3_3V},
        /*EMU_XCVR_STATE_SPD_AUDIO   */ {1,   0,  1,   EMU_VUSB_IN_VBUS,   EMU_VUSB_OUT_3_3V},
        /*EMU_XCVR_STATE_USB_HOST    */ {0,   1,  1,   EMU_VUSB_IN_VINBUS, EMU_VUSB_OUT_3_3V},
        /*EMU_XCVR_STATE_FACTORY_MODE*/ {0,   1,  1,   EMU_VUSB_IN_VINBUS, EMU_VUSB_OUT_3_3V},
    };

    if (state >= EMU_XCVR_STATE__NUM)
    {
        state = EMU_XCVR_STATE_OFF;
    }
    
    /* Set the USB suspend bit */
    EMU_GLUE_set_usb_suspend(transceiver_config_table[state].usb_suspend);
    EMU_GLUE_set_transceiver_params(transceiver_config_table[state].xcvr_enable,
                                    transceiver_config_table[state].vusb_enable,
                                    (EMU_VUSB_IN_T)transceiver_config_table[state].vusb_input_source,
                                    (unsigned short)transceiver_config_table[state].vusb_voltage);
}

/*==================================================================================================
FUNCTION:
   emu_configure_accessory
   
DESCRIPTION: 
   Configures the EMU related registers in the power IC for currently
   connected accessory.
   
ARGUMENTS PASSED:
   accessory - the currently connected accessory.
    
RETURN VALUE:
   None

PRE-CONDITIONS:
   None

POST-CONDITIONS:
   None

IMPORTANT NOTES:
   None
==================================================================================================*/
void
emu_configure_accessory(EMU_ACCY_T accessory)
{
    static const struct
    {
        unsigned short dplus_150k_pull_up : 1;
        unsigned short vbus_5k_pull_down  : 1;
        unsigned short fsenb              : 1;
        unsigned short transceiver_state  : 4;
        unsigned short conn_mode          : 3;
    } accessory_config_table[EMU_ACCY_TYPE__NUM_DEVICES] =
    {
        /*Accessory                        DPPU VBPD  FS  TRANSCEIVER STATE            CONN MODE               */
        /*EMU_ACCY_TYPE_NONE              */ {1,   1,  0, EMU_XCVR_STATE_OFF,          EMU_CONN_MODE_USB       },
        /*EMU_ACCY_TYPE_INVALID           */ {0,   1,  0, EMU_XCVR_STATE_OFF,          EMU_CONN_MODE_USB       },
        /*EMU_ACCY_TYPE_NOT_SUPPORTED     */ {0,   1,  0, EMU_XCVR_STATE_OFF,          EMU_CONN_MODE_USB       },
        /*EMU_ACCY_TYPE_CHARGER_MID       */ {0,   1,  0, EMU_XCVR_STATE_OFF,          EMU_CONN_MODE_USB       },
        /*EMU_ACCY_TYPE_CHARGER_MID_MPX   */ {0,   1,  0, EMU_XCVR_STATE_OFF,          EMU_CONN_MODE_USB       },
        /*EMU_ACCY_TYPE_CHARGER_FAST      */ {0,   1,  0, EMU_XCVR_STATE_OFF,          EMU_CONN_MODE_USB       },
        /*EMU_ACCY_TYPE_CHARGER_FAST_MPX  */ {0,   1,  0, EMU_XCVR_STATE_OFF,          EMU_CONN_MODE_USB       },
        /*EMU_ACCY_TYPE_CARKIT_MID        */ {0,   1,  0, EMU_XCVR_STATE_SPD_AUDIO,    EMU_CONN_MODE_MONO_AUDIO},
        /*EMU_ACCY_TYPE_CARKIT_FAST       */ {0,   1,  0, EMU_XCVR_STATE_SPD_AUDIO,    EMU_CONN_MODE_MONO_AUDIO},
        /*EMU_ACCY_TYPE_CABLE_USB         */ {0,   0,  0, EMU_XCVR_STATE_USB_HOST,     EMU_CONN_MODE_USB       },
        /*EMU_ACCY_TYPE_CABLE_REGRESSION  */ {0,   0,  0, EMU_XCVR_STATE_USB_HOST,     EMU_CONN_MODE_USB       },
        /*EMU_ACCY_TYPE_CABLE_FACTORY     */ {0,   0,  0, EMU_XCVR_STATE_FACTORY_MODE, EMU_CONN_MODE_USB       },
        /*EMU_ACCY_TYPE_CABLE_USB_OTG     */ {0,   0,  0, EMU_XCVR_STATE_USB_HOST,     EMU_CONN_MODE_USB       },
        /*EMU_ACCY_TYPE_HEADSET_EMU_MONO  */ {0,   1,  1, EMU_XCVR_STATE_PPD_AUDIO,    EMU_CONN_MODE_USB       },
        /*EMU_ACCY_TYPE_HEADSET_EMU_STEREO*/ {0,   1,  1, EMU_XCVR_STATE_PPD_AUDIO,    EMU_CONN_MODE_USB       }
    };

    if (accessory >= EMU_ACCY_TYPE__NUM_DEVICES)
    {
        accessory = EMU_ACCY_TYPE_INVALID;
    }
    
    /* Set the D+ 150K pull up */
    EMU_GLUE_set_dplus_150k_pull_up((unsigned long)accessory_config_table[accessory].dplus_150k_pull_up);

    /* Set the VBUS 5K pull down */
    EMU_GLUE_set_vbus_5k_pull_down((unsigned long)accessory_config_table[accessory].vbus_5k_pull_down);

    /* Set the USB full speed bit so that the 1.5K pullup pulls up on the D- line */
    EMU_GLUE_set_low_speed_mode((unsigned long)accessory_config_table[accessory].fsenb);

    /* Enable the 1.5K pullup on the D- line if FSENB has been set to 1 */
    EMU_GLUE_set_dplus_1_5k_pull_up((unsigned long)accessory_config_table[accessory].fsenb);