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| /******************** (C) COPYRIGHT 2008 STMicroelectronics ******************** |
| * File Name : usb_pwr.c |
| * Author : MCD Application Team |
| * Version : V2.0.0 |
| * Date : 09/29/2008 |
| * Description : Connection/disconnection & power management |
| ******************************************************************************** |
| * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS |
| * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME. |
| * AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT, |
| * INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE |
| * CONTENT OF SUCH SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING |
| * INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS. |
| *******************************************************************************/ |
| |
| /* Includes ------------------------------------------------------------------*/ |
| #include "91x_lib.h" |
| #include "usb_lib.h" |
| #include "usb_conf.h" |
| #include "usb_pwr.h" |
| #include "usb.h" |
| |
| /* Private typedef -----------------------------------------------------------*/ |
| /* Private define ------------------------------------------------------------*/ |
| /* Private macro -------------------------------------------------------------*/ |
| /* Private variables ---------------------------------------------------------*/ |
| vu32 bDeviceState = UNCONNECTED; /* USB device status */ |
| volatile bool fSuspendEnabled = TRUE; /* true when suspend is possible */ |
| |
| struct |
| { |
| volatile RESUME_STATE eState; |
| volatile u8 bESOFcnt; |
| } |
| ResumeS; |
| |
| /* Extern variables ----------------------------------------------------------*/ |
| /* Private function prototypes -----------------------------------------------*/ |
| /* Extern function prototypes ------------------------------------------------*/ |
| /* Private functions ---------------------------------------------------------*/ |
| |
| /******************************************************************************* |
| * Function Name : PowerOn |
| * Description : USB IP power ON Routine. |
| * Input : None. |
| * Output : None. |
| * Return : USB_SUCCESS. |
| *******************************************************************************/ |
| RESULT PowerOn(void) |
| { |
| u16 wRegVal; |
| |
| /*** cable plugged-in ? ***/ |
| USB_CableConfig(ENABLE); |
| |
| /*** CNTR_PWDN = 0 ***/ |
| wRegVal = CNTR_FRES; |
| _SetCNTR(wRegVal); |
| |
| /*** CNTR_FRES = 0 ***/ |
| wInterrupt_Mask = 0; |
| _SetCNTR(wInterrupt_Mask); |
| /*** Clear pending interrupts ***/ |
| _SetISTR(0); |
| /*** Set interrupt mask ***/ |
| wInterrupt_Mask = CNTR_RESETM | CNTR_SUSPM | CNTR_WKUPM; |
| _SetCNTR(wInterrupt_Mask); |
| |
| return USB_SUCCESS; |
| } |
| |
| /******************************************************************************* |
| * Function Name : PowerOff |
| * Description : handles switch-off conditions |
| * Input : None. |
| * Output : None. |
| * Return : USB_SUCCESS. |
| *******************************************************************************/ |
| RESULT PowerOff() |
| { |
| /* disable all ints and force USB reset */ |
| _SetCNTR(CNTR_FRES); |
| /* clear interrupt status register */ |
| _SetISTR(0); |
| /* Disable the Pull-Up*/ |
| USB_CableConfig(DISABLE); |
| /* switch-off device */ |
| _SetCNTR(CNTR_FRES + CNTR_PDWN); |
| /* sw variables reset */ |
| /* ... */ |
| |
| return USB_SUCCESS; |
| } |
| |
| /******************************************************************************* |
| * Function Name : Suspend |
| * Description : sets suspend mode operating conditions |
| * Input : None. |
| * Output : None. |
| * Return : USB_SUCCESS. |
| *******************************************************************************/ |
| void Suspend(void) |
| { |
| u16 wCNTR; |
| /* suspend preparation */ |
| /* ... */ |
| |
| /* macrocell enters suspend mode */ |
| wCNTR = _GetCNTR(); |
| wCNTR |= CNTR_FSUSP; |
| _SetCNTR(wCNTR); |
| |
| /* ------------------ ONLY WITH BUS-POWERED DEVICES ---------------------- */ |
| /* power reduction */ |
| /* ... on connected devices */ |
| |
| |
| /* force low-power mode in the macrocell */ |
| wCNTR = _GetCNTR(); |
| wCNTR |= CNTR_LPMODE; |
| _SetCNTR(wCNTR); |
| |
| /* switch-off the clocks */ |
| /* ... */ |
| USB_EnterLowPowerMode(); |
| } |
| |
| /******************************************************************************* |
| * Function Name : Resume_Init |
| * Description : Handles wake-up restoring normal operations |
| * Input : None. |
| * Output : None. |
| * Return : USB_SUCCESS. |
| *******************************************************************************/ |
| void Resume_Init(void) |
| { |
| u16 wCNTR; |
| /* ------------------ ONLY WITH BUS-POWERED DEVICES ---------------------- */ |
| /* restart the clocks */ |
| /* ... */ |
| |
| /* CNTR_LPMODE = 0 */ |
| wCNTR = _GetCNTR(); |
| wCNTR &= (~CNTR_LPMODE); |
| _SetCNTR(wCNTR); |
| |
| /* restore full power */ |
| /* ... on connected devices */ |
| USB_LeaveLowPowerMode(); |
| |
| /* reset FSUSP bit */ |
| _SetCNTR(IMR_MSK); |
| |
| /* reverse suspend preparation */ |
| /* ... */ |
| } |
| |
| /******************************************************************************* |
| * Function Name : Resume |
| * Description : This is the state machine handling resume operations and |
| * timing sequence. The control is based on the Resume structure |
| * variables and on the ESOF interrupt calling this subroutine |
| * without changing machine state. |
| * Input : a state machine value (RESUME_STATE) |
| * RESUME_ESOF doesn't change ResumeS.eState allowing |
| * decrementing of the ESOF counter in different states. |
| * Output : None. |
| * Return : None. |
| *******************************************************************************/ |
| void Resume(RESUME_STATE eResumeSetVal) |
| { |
| u16 wCNTR; |
| |
| if (eResumeSetVal != RESUME_ESOF) |
| ResumeS.eState = eResumeSetVal; |
| |
| switch (ResumeS.eState) |
| { |
| case RESUME_EXTERNAL: |
| Resume_Init(); |
| ResumeS.eState = RESUME_OFF; |
| break; |
| case RESUME_INTERNAL: |
| Resume_Init(); |
| ResumeS.eState = RESUME_START; |
| break; |
| case RESUME_LATER: |
| ResumeS.bESOFcnt = 2; |
| ResumeS.eState = RESUME_WAIT; |
| break; |
| case RESUME_WAIT: |
| ResumeS.bESOFcnt--; |
| if (ResumeS.bESOFcnt == 0) |
| ResumeS.eState = RESUME_START; |
| break; |
| case RESUME_START: |
| wCNTR = _GetCNTR(); |
| wCNTR |= CNTR_RESUME; |
| _SetCNTR(wCNTR); |
| ResumeS.eState = RESUME_ON; |
| ResumeS.bESOFcnt = 10; |
| break; |
| case RESUME_ON: |
| ResumeS.bESOFcnt--; |
| if (ResumeS.bESOFcnt == 0) |
| { |
| wCNTR = _GetCNTR(); |
| wCNTR &= (~CNTR_RESUME); |
| _SetCNTR(wCNTR); |
| ResumeS.eState = RESUME_OFF; |
| } |
| break; |
| case RESUME_OFF: |
| case RESUME_ESOF: |
| default: |
| ResumeS.eState = RESUME_OFF; |
| break; |
| } |
| } |
| |
| /******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE****/ |