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| Rev | Author | Line No. | Line |
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| 1 | ingob | 1 | /******************** (C) COPYRIGHT 2006 STMicroelectronics ******************** |
| 2 | * File Name : usb_pwr.c |
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| 3 | * Author : MCD Application Team |
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| 4 | * Date First Issued : 10/01/2006 : V1.0 |
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| 5 | * Description : Connection/disconnection & power management |
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| 6 | ******************************************************************************** |
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| 7 | * History: |
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| 8 | * 10/01/2006 : V1.0 |
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| 9 | ******************************************************************************** |
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| 10 | * THE PRESENT SOFTWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS |
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| 11 | * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME. |
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| 12 | * AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT, |
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| 13 | * INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE |
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| 14 | * CONTENT OF SUCH SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING |
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| 15 | * INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS. |
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| 16 | *******************************************************************************/ |
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| 17 | /* Includes ------------------------------------------------------------------*/ |
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| 41 | ingob | 18 | #include "usb_lib.h" |
| 19 | #include "hw_config.h" |
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| 20 | #include "usb_pwr.h" |
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| 1 | ingob | 21 | /* Private typedef -----------------------------------------------------------*/ |
| 22 | /* Private define ------------------------------------------------------------*/ |
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| 23 | /* Private macro -------------------------------------------------------------*/ |
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| 24 | /* Private variables ---------------------------------------------------------*/ |
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| 25 | volatile bool fCellSuspended; |
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| 26 | volatile u8 bDeviceState=UNCONNECTED; /* USB device status */ |
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| 27 | volatile bool fSuspendEnabled=TRUE; /* true when suspend is possible */ |
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| 28 | |||
| 29 | struct { |
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| 30 | volatile RESUME_STATE eState; |
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| 31 | volatile u8 bESOFcnt; |
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| 32 | } ResumeS; |
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| 33 | /* Extern variables ----------------------------------------------------------*/ |
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| 34 | /* Private function prototypes -----------------------------------------------*/ |
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| 35 | /* Extern function prototypes ------------------------------------------------*/ |
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| 36 | /* Private functions ---------------------------------------------------------*/ |
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| 37 | /******************************************************************************* |
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| 38 | * Function Name : PowerOn |
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| 39 | * Description : |
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| 40 | * Input : None. |
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| 41 | * Output : None. |
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| 42 | * Return : USB_SUCCESS. |
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| 43 | *******************************************************************************/ |
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| 44 | RESULT PowerOn(void) |
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| 45 | { |
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| 46 | u16 wRegVal; |
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| 47 | |||
| 48 | /*** cable plugged-in ? ***/ |
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| 49 | /*while(!CablePluggedIn());*/ |
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| 50 | USB_Cable_Config(ENABLE); |
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| 51 | |||
| 52 | /*** CNTR_PWDN = 0 ***/ |
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| 53 | wRegVal = CNTR_FRES; |
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| 54 | _SetCNTR(wRegVal); |
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| 55 | |||
| 56 | /*** CNTR_FRES = 0 ***/ |
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| 57 | wInterrupt_Mask = 0; |
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| 58 | _SetCNTR(wInterrupt_Mask); |
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| 59 | /*** Clear pending interrupts ***/ |
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| 60 | _SetISTR(0); |
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| 61 | /*** Set interrupt mask ***/ |
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| 62 | wInterrupt_Mask = CNTR_RESETM | CNTR_SUSPM | CNTR_WKUPM; |
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| 63 | _SetCNTR(wInterrupt_Mask); |
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| 64 | |||
| 65 | return USB_SUCCESS; |
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| 66 | } |
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| 67 | /******************************************************************************* |
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| 68 | * Function Name : PowerOff |
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| 69 | * Description : handles switch-off conditions |
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| 70 | * Input : None. |
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| 71 | * Output : None. |
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| 72 | * Return : USB_SUCCESS. |
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| 73 | *******************************************************************************/ |
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| 74 | RESULT PowerOff() |
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| 75 | { |
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| 76 | /* disable all ints and force USB reset */ |
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| 77 | _SetCNTR(CNTR_FRES); |
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| 78 | /* clear interrupt status register */ |
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| 79 | _SetISTR(0); |
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| 80 | /* Disable the Pull-Up*/ |
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| 81 | USB_Cable_Config(DISABLE); |
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| 82 | /* switch-off device */ |
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| 83 | _SetCNTR(CNTR_FRES+CNTR_PDWN); |
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| 84 | /* sw variables reset */ |
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| 85 | /* ... */ |
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| 86 | |||
| 87 | return USB_SUCCESS; |
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| 88 | } |
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| 89 | /******************************************************************************* |
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| 90 | * Function Name : Suspend |
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| 91 | * Description : sets suspend mode operating conditions |
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| 92 | * Input : None. |
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| 93 | * Output : None. |
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| 94 | * Return : USB_SUCCESS. |
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| 95 | *******************************************************************************/ |
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| 96 | void Suspend(void) |
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| 97 | { |
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| 98 | u16 wCNTR; |
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| 99 | fCellSuspended= TRUE; |
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| 100 | /* suspend preparation */ |
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| 101 | /* ... */ |
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| 102 | |||
| 103 | /* macrocell enters suspend mode */ |
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| 104 | wCNTR = _GetCNTR(); |
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| 105 | wCNTR |= CNTR_FSUSP; |
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| 106 | _SetCNTR(wCNTR); |
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| 107 | |||
| 108 | /* ------------------ ONLY WITH BUS-POWERED DEVICES ---------------------- */ |
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| 109 | /* power reduction */ |
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| 110 | /* ... on connected devices */ |
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| 111 | |||
| 112 | /* force low-power mode in the macrocell */ |
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| 113 | wCNTR = _GetCNTR(); |
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| 114 | wCNTR |= CNTR_LPMODE; |
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| 115 | _SetCNTR(wCNTR); |
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| 116 | |||
| 117 | /* switch-off the clocks */ |
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| 118 | /* ... */ |
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| 119 | |||
| 120 | |||
| 121 | } |
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| 122 | /******************************************************************************* |
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| 123 | * Function Name : Resume_Init |
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| 124 | * Description : Handles wake-up restoring normal operations |
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| 125 | * Input : None. |
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| 126 | * Output : None. |
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| 127 | * Return : USB_SUCCESS. |
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| 128 | *******************************************************************************/ |
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| 129 | void Resume_Init(void) |
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| 130 | { |
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| 131 | u16 wCNTR; |
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| 132 | |||
| 133 | fCellSuspended= FALSE; |
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| 134 | |||
| 135 | /* ------------------ ONLY WITH BUS-POWERED DEVICES ---------------------- */ |
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| 136 | /* restart the clocks */ |
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| 137 | /* ... */ |
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| 138 | |||
| 139 | /* CNTR_LPMODE = 0 */ |
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| 140 | wCNTR = _GetCNTR(); |
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| 141 | wCNTR &= (~CNTR_LPMODE); |
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| 142 | _SetCNTR(wCNTR); |
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| 143 | |||
| 144 | /* restore full power */ |
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| 145 | /* ... on connected devices */ |
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| 146 | |||
| 147 | /* reset FSUSP bit */ |
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| 148 | _SetCNTR(IMR_MSK); |
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| 149 | |||
| 150 | /* reverse suspend preparation */ |
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| 151 | /* ... */ |
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| 152 | |||
| 153 | } |
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| 154 | /******************************************************************************* |
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| 155 | * Function Name : Resume |
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| 156 | * Description : This is the state machine handling resume operations and |
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| 157 | * timing sequence. The control is based on the Resume structure |
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| 158 | * variables and on the ESOF interrupt calling this subroutine |
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| 159 | * without changing machine state. |
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| 160 | * Input : a state machine value (RESUME_STATE) |
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| 161 | * RESUME_ESOF doesn't change ResumeS.eState allowing |
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| 162 | * decrementing of the ESOF counter in different states. |
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| 163 | * Output : None. |
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| 164 | * Return : None. |
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| 165 | *******************************************************************************/ |
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| 166 | void Resume(RESUME_STATE eResumeSetVal) |
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| 167 | { |
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| 168 | u16 wCNTR; |
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| 169 | u16 wRegVal; |
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| 170 | |||
| 171 | if(eResumeSetVal != RESUME_ESOF) |
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| 172 | ResumeS.eState = eResumeSetVal; |
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| 173 | |||
| 174 | switch(ResumeS.eState) |
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| 175 | { |
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| 176 | case RESUME_EXTERNAL: |
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| 177 | Resume_Init(); |
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| 178 | wRegVal = GetFNR(); |
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| 179 | if(wRegVal & FNR_RXDP) //10 & 11 false conditions |
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| 180 | { |
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| 181 | Suspend(); |
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| 182 | } |
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| 183 | ResumeS.eState = RESUME_OFF; |
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| 184 | break; |
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| 185 | case RESUME_INTERNAL: |
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| 186 | Resume_Init(); |
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| 187 | ResumeS.eState = RESUME_START; |
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| 188 | break; |
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| 189 | case RESUME_LATER: |
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| 190 | ResumeS.bESOFcnt = 2; |
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| 191 | ResumeS.eState = RESUME_WAIT; |
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| 192 | break; |
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| 193 | case RESUME_WAIT: |
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| 194 | ResumeS.bESOFcnt--; |
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| 195 | if(ResumeS.bESOFcnt == 0) |
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| 196 | ResumeS.eState = RESUME_START; |
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| 197 | break; |
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| 198 | case RESUME_START: |
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| 199 | wCNTR = _GetCNTR(); |
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| 200 | wCNTR |= CNTR_RESUME; |
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| 201 | _SetCNTR(wCNTR); |
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| 202 | ResumeS.eState = RESUME_ON; |
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| 203 | ResumeS.bESOFcnt = 10; |
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| 204 | break; |
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| 205 | case RESUME_ON: |
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| 206 | ResumeS.bESOFcnt--; |
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| 207 | if(ResumeS.bESOFcnt == 0) |
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| 208 | { |
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| 209 | wCNTR = _GetCNTR(); |
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| 210 | wCNTR &= (~CNTR_RESUME); |
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| 211 | _SetCNTR(wCNTR); |
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| 212 | ResumeS.eState = RESUME_OFF; |
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| 213 | } |
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| 214 | break; |
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| 215 | case RESUME_OFF: |
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| 216 | case RESUME_ESOF: |
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| 217 | default: |
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| 218 | ResumeS.eState = RESUME_OFF; |
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| 219 | break; |
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| 220 | } |
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| 221 | } |
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| 222 | /******************* (C) COPYRIGHT 2006 STMicroelectronics *****END OF FILE****/ |