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275 | killagreg | 1 | /******************** (C) COPYRIGHT 2008 STMicroelectronics ******************** |
1 | ingob | 2 | * File Name : usb_pwr.c |
3 | * Author : MCD Application Team |
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275 | killagreg | 4 | * Version : V2.0.0 |
5 | * Date : 09/29/2008 |
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1 | ingob | 6 | * Description : Connection/disconnection & power management |
7 | ******************************************************************************** |
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275 | killagreg | 8 | * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS |
1 | ingob | 9 | * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME. |
10 | * AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT, |
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11 | * INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE |
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12 | * CONTENT OF SUCH SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING |
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13 | * INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS. |
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14 | *******************************************************************************/ |
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275 | killagreg | 15 | |
1 | ingob | 16 | /* Includes ------------------------------------------------------------------*/ |
275 | killagreg | 17 | #include "91x_lib.h" |
41 | ingob | 18 | #include "usb_lib.h" |
275 | killagreg | 19 | #include "usb_conf.h" |
41 | ingob | 20 | #include "usb_pwr.h" |
111 | killagreg | 21 | #include "usb.h" |
275 | killagreg | 22 | |
1 | ingob | 23 | /* Private typedef -----------------------------------------------------------*/ |
24 | /* Private define ------------------------------------------------------------*/ |
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25 | /* Private macro -------------------------------------------------------------*/ |
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26 | /* Private variables ---------------------------------------------------------*/ |
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275 | killagreg | 27 | vu32 bDeviceState = UNCONNECTED; /* USB device status */ |
28 | volatile bool fSuspendEnabled = TRUE; /* true when suspend is possible */ |
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1 | ingob | 29 | |
275 | killagreg | 30 | struct |
31 | { |
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32 | volatile RESUME_STATE eState; |
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33 | volatile u8 bESOFcnt; |
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34 | } |
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35 | ResumeS; |
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36 | |||
1 | ingob | 37 | /* Extern variables ----------------------------------------------------------*/ |
38 | /* Private function prototypes -----------------------------------------------*/ |
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39 | /* Extern function prototypes ------------------------------------------------*/ |
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40 | /* Private functions ---------------------------------------------------------*/ |
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275 | killagreg | 41 | |
1 | ingob | 42 | /******************************************************************************* |
43 | * Function Name : PowerOn |
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275 | killagreg | 44 | * Description : USB IP power ON Routine. |
1 | ingob | 45 | * Input : None. |
46 | * Output : None. |
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47 | * Return : USB_SUCCESS. |
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48 | *******************************************************************************/ |
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49 | RESULT PowerOn(void) |
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50 | { |
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275 | killagreg | 51 | u16 wRegVal; |
1 | ingob | 52 | |
275 | killagreg | 53 | /*** cable plugged-in ? ***/ |
54 | USB_CableConfig(ENABLE); |
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1 | ingob | 55 | |
275 | killagreg | 56 | /*** CNTR_PWDN = 0 ***/ |
57 | wRegVal = CNTR_FRES; |
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58 | _SetCNTR(wRegVal); |
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1 | ingob | 59 | |
275 | killagreg | 60 | /*** CNTR_FRES = 0 ***/ |
61 | wInterrupt_Mask = 0; |
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62 | _SetCNTR(wInterrupt_Mask); |
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63 | /*** Clear pending interrupts ***/ |
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64 | _SetISTR(0); |
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65 | /*** Set interrupt mask ***/ |
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66 | wInterrupt_Mask = CNTR_RESETM | CNTR_SUSPM | CNTR_WKUPM; |
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67 | _SetCNTR(wInterrupt_Mask); |
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68 | |||
69 | return USB_SUCCESS; |
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1 | ingob | 70 | } |
275 | killagreg | 71 | |
1 | ingob | 72 | /******************************************************************************* |
73 | * Function Name : PowerOff |
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74 | * Description : handles switch-off conditions |
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75 | * Input : None. |
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76 | * Output : None. |
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77 | * Return : USB_SUCCESS. |
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78 | *******************************************************************************/ |
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79 | RESULT PowerOff() |
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80 | { |
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275 | killagreg | 81 | /* disable all ints and force USB reset */ |
82 | _SetCNTR(CNTR_FRES); |
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83 | /* clear interrupt status register */ |
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84 | _SetISTR(0); |
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85 | /* Disable the Pull-Up*/ |
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86 | USB_CableConfig(DISABLE); |
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87 | /* switch-off device */ |
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88 | _SetCNTR(CNTR_FRES + CNTR_PDWN); |
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89 | /* sw variables reset */ |
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90 | /* ... */ |
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1 | ingob | 91 | |
275 | killagreg | 92 | return USB_SUCCESS; |
1 | ingob | 93 | } |
275 | killagreg | 94 | |
1 | ingob | 95 | /******************************************************************************* |
96 | * Function Name : Suspend |
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97 | * Description : sets suspend mode operating conditions |
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98 | * Input : None. |
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99 | * Output : None. |
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100 | * Return : USB_SUCCESS. |
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101 | *******************************************************************************/ |
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102 | void Suspend(void) |
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103 | { |
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275 | killagreg | 104 | u16 wCNTR; |
105 | /* suspend preparation */ |
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106 | /* ... */ |
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1 | ingob | 107 | |
275 | killagreg | 108 | /* macrocell enters suspend mode */ |
109 | wCNTR = _GetCNTR(); |
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110 | wCNTR |= CNTR_FSUSP; |
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111 | _SetCNTR(wCNTR); |
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1 | ingob | 112 | |
275 | killagreg | 113 | /* ------------------ ONLY WITH BUS-POWERED DEVICES ---------------------- */ |
114 | /* power reduction */ |
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115 | /* ... on connected devices */ |
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1 | ingob | 116 | |
117 | |||
275 | killagreg | 118 | /* force low-power mode in the macrocell */ |
119 | wCNTR = _GetCNTR(); |
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120 | wCNTR |= CNTR_LPMODE; |
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121 | _SetCNTR(wCNTR); |
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1 | ingob | 122 | |
275 | killagreg | 123 | /* switch-off the clocks */ |
124 | /* ... */ |
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125 | USB_EnterLowPowerMode(); |
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126 | } |
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1 | ingob | 127 | |
128 | /******************************************************************************* |
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129 | * Function Name : Resume_Init |
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130 | * Description : Handles wake-up restoring normal operations |
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131 | * Input : None. |
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132 | * Output : None. |
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133 | * Return : USB_SUCCESS. |
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134 | *******************************************************************************/ |
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135 | void Resume_Init(void) |
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136 | { |
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137 | u16 wCNTR; |
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275 | killagreg | 138 | /* ------------------ ONLY WITH BUS-POWERED DEVICES ---------------------- */ |
139 | /* restart the clocks */ |
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140 | /* ... */ |
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1 | ingob | 141 | |
275 | killagreg | 142 | /* CNTR_LPMODE = 0 */ |
143 | wCNTR = _GetCNTR(); |
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144 | wCNTR &= (~CNTR_LPMODE); |
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145 | _SetCNTR(wCNTR); |
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1 | ingob | 146 | |
275 | killagreg | 147 | /* restore full power */ |
148 | /* ... on connected devices */ |
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149 | USB_LeaveLowPowerMode(); |
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1 | ingob | 150 | |
275 | killagreg | 151 | /* reset FSUSP bit */ |
152 | _SetCNTR(IMR_MSK); |
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1 | ingob | 153 | |
275 | killagreg | 154 | /* reverse suspend preparation */ |
155 | /* ... */ |
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156 | } |
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1 | ingob | 157 | |
158 | /******************************************************************************* |
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159 | * Function Name : Resume |
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160 | * Description : This is the state machine handling resume operations and |
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161 | * timing sequence. The control is based on the Resume structure |
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162 | * variables and on the ESOF interrupt calling this subroutine |
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163 | * without changing machine state. |
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164 | * Input : a state machine value (RESUME_STATE) |
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165 | * RESUME_ESOF doesn't change ResumeS.eState allowing |
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166 | * decrementing of the ESOF counter in different states. |
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167 | * Output : None. |
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168 | * Return : None. |
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169 | *******************************************************************************/ |
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170 | void Resume(RESUME_STATE eResumeSetVal) |
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171 | { |
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275 | killagreg | 172 | u16 wCNTR; |
1 | ingob | 173 | |
275 | killagreg | 174 | if (eResumeSetVal != RESUME_ESOF) |
175 | ResumeS.eState = eResumeSetVal; |
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1 | ingob | 176 | |
275 | killagreg | 177 | switch (ResumeS.eState) |
178 | { |
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179 | case RESUME_EXTERNAL: |
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180 | Resume_Init(); |
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181 | ResumeS.eState = RESUME_OFF; |
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182 | break; |
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183 | case RESUME_INTERNAL: |
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184 | Resume_Init(); |
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185 | ResumeS.eState = RESUME_START; |
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186 | break; |
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187 | case RESUME_LATER: |
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188 | ResumeS.bESOFcnt = 2; |
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189 | ResumeS.eState = RESUME_WAIT; |
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190 | break; |
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191 | case RESUME_WAIT: |
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192 | ResumeS.bESOFcnt--; |
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193 | if (ResumeS.bESOFcnt == 0) |
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194 | ResumeS.eState = RESUME_START; |
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195 | break; |
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196 | case RESUME_START: |
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197 | wCNTR = _GetCNTR(); |
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198 | wCNTR |= CNTR_RESUME; |
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199 | _SetCNTR(wCNTR); |
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200 | ResumeS.eState = RESUME_ON; |
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201 | ResumeS.bESOFcnt = 10; |
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202 | break; |
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203 | case RESUME_ON: |
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204 | ResumeS.bESOFcnt--; |
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205 | if (ResumeS.bESOFcnt == 0) |
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206 | { |
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207 | wCNTR = _GetCNTR(); |
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208 | wCNTR &= (~CNTR_RESUME); |
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209 | _SetCNTR(wCNTR); |
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210 | ResumeS.eState = RESUME_OFF; |
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211 | } |
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212 | break; |
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213 | case RESUME_OFF: |
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214 | case RESUME_ESOF: |
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215 | default: |
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216 | ResumeS.eState = RESUME_OFF; |
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217 | break; |
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218 | } |
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1 | ingob | 219 | } |
275 | killagreg | 220 | |
221 | /******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE****/ |