Diff: drv/usb/UsbHostMgr.cpp

Revision:

4:fd826cad83c0

Child:

5:dd63a1e02b1b

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/drv/usb/UsbHostMgr.cpp	Fri Jul 09 14:46:47 2010 +0000
@@ -0,0 +1,358 @@
+
+/*
+Copyright (c) 2010 Donatien Garnier (donatiengar [at] gmail [dot] com)
+ 
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+ 
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+ 
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+*/
+
+#include "UsbHostMgr.h"
+
+#include "usb_mem.h"
+
+#include "string.h" //For memcpy, memmove, memset
+
+#include "netCfg.h"
+#if NET_USB
+
+//#define __DEBUG
+#include "dbg/dbg.h"
+
+// bits of the USB/OTG clock control register
+#define HOST_CLK_EN     (1<<0)
+#define DEV_CLK_EN      (1<<1)
+#define PORTSEL_CLK_EN  (1<<3)
+#define AHB_CLK_EN      (1<<4)
+
+// bits of the USB/OTG clock status register
+#define HOST_CLK_ON     (1<<0)
+#define DEV_CLK_ON      (1<<1)
+#define PORTSEL_CLK_ON  (1<<3)
+#define AHB_CLK_ON      (1<<4)
+
+// we need host clock, OTG/portsel clock and AHB clock
+#define CLOCK_MASK (HOST_CLK_EN | PORTSEL_CLK_EN | AHB_CLK_EN)
+
+static UsbHostMgr* pMgr = NULL;
+
+extern "C" void sUsbIrqhandler(void) __irq
+{
+  DBG("\n+Int\n");
+  if(pMgr)
+    pMgr->UsbIrqhandler();
+  DBG("\n-Int\n");
+  return;
+}
+
+UsbHostMgr::UsbHostMgr() : m_lpDevices()
+{
+  if(!pMgr)
+    pMgr = this;
+  usb_mem_init();
+  memset(m_lpDevices, NULL, sizeof(UsbDevice*) * USB_HOSTMGR_MAX_DEVS);
+  m_pHcca = (HCCA*) usb_get_hcca();
+  memset((void*)m_pHcca, 0, 0x100);
+  DBG("Host manager at %p\n", this);
+}
+
+UsbHostMgr::~UsbHostMgr()
+{
+  if(pMgr == this)
+    pMgr = NULL;
+}
+
+UsbErr UsbHostMgr::init() //Initialize host
+{
+  NVIC_DisableIRQ(USB_IRQn);                           /* Disable the USB interrupt source           */
+  
+  LPC_SC->PCONP       &= ~(1UL<<31); //Cut power
+  wait(1);
+  
+  
+  // turn on power for USB
+  LPC_SC->PCONP       |= (1UL<<31);
+  // Enable USB host clock, port selection and AHB clock
+  LPC_USB->USBClkCtrl |= CLOCK_MASK;
+  // Wait for clocks to become available
+  while ((LPC_USB->USBClkSt & CLOCK_MASK) != CLOCK_MASK)
+      ;
+  
+  // it seems the bits[0:1] mean the following
+  // 0: U1=device, U2=host
+  // 1: U1=host, U2=host
+  // 2: reserved
+  // 3: U1=host, U2=device
+  // NB: this register is only available if OTG clock (aka "port select") is enabled!!
+  // since we don't care about port 2, set just bit 0 to 1 (U1=host)
+  LPC_USB->OTGStCtrl |= 1;
+  
+  // now that we've configured the ports, we can turn off the portsel clock
+  LPC_USB->USBClkCtrl &= ~PORTSEL_CLK_EN;
+  
+  // power pins are not connected on mbed, so we can skip them
+  /* P1[18] = USB_UP_LED, 01 */
+  /* P1[19] = /USB_PPWR,     10 */
+  /* P1[22] = USB_PWRD, 10 */
+  /* P1[27] = /USB_OVRCR, 10 */
+  /*LPC_PINCON->PINSEL3 &= ~((3<<4) | (3<<6) | (3<<12) | (3<<22));  
+  LPC_PINCON->PINSEL3 |=  ((1<<4)|(2<<6) | (2<<12) | (2<<22));   // 0x00802080
+  */
+
+  // configure USB D+/D- pins
+  /* P0[29] = USB_D+, 01 */
+  /* P0[30] = USB_D-, 01 */
+  LPC_PINCON->PINSEL1 &= ~((3<<26) | (3<<28));  
+  LPC_PINCON->PINSEL1 |=  ((1<<26)|(1<<28));     // 0x14000000
+      
+  DBG("Initializing Host Stack\n");
+  
+  wait_ms(100);                                   /* Wait 50 ms before apply reset              */
+  LPC_USB->HcControl       = 0;                       /* HARDWARE RESET                             */
+  LPC_USB->HcControlHeadED = 0;                       /* Initialize Control list head to Zero       */
+  LPC_USB->HcBulkHeadED    = 0;                       /* Initialize Bulk list head to Zero          */
+  
+                                                      /* SOFTWARE RESET                             */
+  LPC_USB->HcCommandStatus = OR_CMD_STATUS_HCR;
+  LPC_USB->HcFmInterval    = DEFAULT_FMINTERVAL;      /* Write Fm Interval and Largest Data Packet Counter */
+
+                                                      /* Put HC in operational state                */
+  LPC_USB->HcControl  = (LPC_USB->HcControl & (~OR_CONTROL_HCFS)) | OR_CONTROL_HC_OPER;
+  LPC_USB->HcRhStatus = OR_RH_STATUS_LPSC;            /* Set Global Power                           */
+  
+  LPC_USB->HcHCCA = (uint32_t)(m_pHcca);
+  LPC_USB->HcInterruptStatus |= LPC_USB->HcInterruptStatus;                   /* Clear Interrrupt Status                    */
+
+
+  LPC_USB->HcInterruptEnable  = OR_INTR_ENABLE_MIE |
+                       OR_INTR_ENABLE_WDH |
+                       OR_INTR_ENABLE_RHSC;
+
+  NVIC_SetPriority(USB_IRQn, 0);       /* highest priority */
+  /* Enable the USB Interrupt */
+  NVIC_SetVector(USB_IRQn, (uint32_t)(sUsbIrqhandler));
+  LPC_USB->HcRhPortStatus1 = OR_RH_PORT_CSC;
+  LPC_USB->HcRhPortStatus1 = OR_RH_PORT_PRSC;
+  
+  /* Check for any connected devices */
+  if (LPC_USB->HcRhPortStatus1 & OR_RH_PORT_CCS)  //Root device connected
+  {
+    //Device connected
+    wait(1);
+    DBG("Device connected (%08x)\n", LPC_USB->HcRhPortStatus1);
+    onUsbDeviceConnected(0, 1); //Hub 0 (root hub), Port 1 (count starts at 1)
+  }
+  
+  DBG("Enabling IRQ\n");
+  NVIC_EnableIRQ(USB_IRQn);
+  DBG("End of host stack initialization\n");
+  return USBERR_OK;
+}
+
+void UsbHostMgr::poll() //Enumerate connected devices, etc
+{
+  for(int i = 0; i < devicesCount(); i++)
+  {
+    if( (m_lpDevices[i]->m_connected)
+    &&  !(m_lpDevices[i]->m_enumerated) )
+    {
+      m_lpDevices[i]->enumerate();
+      return;
+    }
+  }
+}
+
+int UsbHostMgr::devicesCount()
+{
+  int i;
+  for(i = 0; i < USB_HOSTMGR_MAX_DEVS; i++)
+  {
+    if (m_lpDevices[i] == NULL)
+      break;
+  }
+  return i;
+}
+
+UsbDevice* UsbHostMgr::getDevice(int item)
+{
+  UsbDevice* pDev = m_lpDevices[item];
+  if(!pDev)
+    return NULL;
+    
+  pDev->m_refs++;
+  return pDev;
+}
+
+void UsbHostMgr::releaseDevice(UsbDevice* pDev)
+{
+  pDev->m_refs--;
+  if(pDev->m_refs > 0)
+    return;
+  //If refs count = 0, delete
+  //Find & remove from list
+  int i;
+  for(i = 0; i < USB_HOSTMGR_MAX_DEVS; i++)
+  {
+    if (m_lpDevices[i] == pDev)
+      break;
+  }
+  if(i!=USB_HOSTMGR_MAX_DEVS)
+    memmove(&m_lpDevices[i], &m_lpDevices[i+1], sizeof(UsbDevice*) * (USB_HOSTMGR_MAX_DEVS - (i + 1))); //Safer than memcpy because of overlapping mem
+  m_lpDevices[USB_HOSTMGR_MAX_DEVS - 1] = NULL;
+  delete pDev;
+}
+
+void UsbHostMgr::UsbIrqhandler()
+{
+  uint32_t   int_status;
+  uint32_t   ie_status;
+  
+  int_status    = LPC_USB->HcInterruptStatus;                          /* Read Interrupt Status                */
+  ie_status     = LPC_USB->HcInterruptEnable;                          /* Read Interrupt enable status         */
+
+  if (!(int_status & ie_status))
+  {
+    return;
+  }
+  else
+  {
+    int_status = int_status & ie_status;
+    if (int_status & OR_INTR_STATUS_RHSC) /* Root hub status change interrupt     */
+    {
+      DBG("LPC_USB->HcRhPortStatus1 = %08x\n", LPC_USB->HcRhPortStatus1);
+      if (LPC_USB->HcRhPortStatus1 & OR_RH_PORT_CSC)
+      {
+        if (LPC_USB->HcRhStatus & OR_RH_STATUS_DRWE)
+        {
+            /*
+             * When DRWE is on, Connect Status Change
+             * means a remote wakeup event.
+            */
+            //HOST_RhscIntr = 1;// JUST SOMETHING FOR A BREAKPOINT
+        }
+        else
+        {
+          /*
+           * When DRWE is off, Connect Status Change
+           * is NOT a remote wakeup event
+          */
+          if (LPC_USB->HcRhPortStatus1 & OR_RH_PORT_CCS)  //Root device connected
+          {
+            //Device connected
+            DBG("Device connected (%08x)\n", LPC_USB->HcRhPortStatus1);
+            onUsbDeviceConnected(0, 1); //Hub 0 (root hub), Port 1 (count starts at 1)
+          }
+          else //Root device disconnected
+          {
+            //Device disconnected
+            DBG("Device disconnected\n");
+            onUsbDeviceDisconnected(0, 1);
+          }
+          //TODO: HUBS
+        }
+        LPC_USB->HcRhPortStatus1 = OR_RH_PORT_CSC;
+      }
+      if (LPC_USB->HcRhPortStatus1 & OR_RH_PORT_PRSC)
+      {
+        LPC_USB->HcRhPortStatus1 = OR_RH_PORT_PRSC;
+      }
+    }  
+    if (int_status & OR_INTR_STATUS_WDH) /* Writeback Done Head interrupt        */
+    {                  
+      //UsbEndpoint::sOnCompletion((LPC_USB->HccaDoneHead) & 0xFE);
+      if(m_pHcca->DoneHead)
+      {
+        UsbEndpoint::sOnCompletion(m_pHcca->DoneHead);
+        m_pHcca->DoneHead = 0;
+        LPC_USB->HcInterruptStatus = OR_INTR_STATUS_WDH;
+        if(m_pHcca->DoneHead)
+          DBG("??????????????????????????????\n\n\n");
+      }
+      else
+      {
+        //Probably an error
+        int_status = LPC_USB->HcInterruptStatus;
+        DBG("HcInterruptStatus = %08x\n", int_status);
+        if (int_status & OR_INTR_STATUS_UE) //Unrecoverable error, disconnect devices and resume
+        {
+          onUsbDeviceDisconnected(0, 1);
+          LPC_USB->HcInterruptStatus = OR_INTR_STATUS_UE;
+          LPC_USB->HcCommandStatus = 0x01; //Host Controller Reset
+        }
+      }
+    }
+    LPC_USB->HcInterruptStatus = int_status; /* Clear interrupt status register      */
+  }
+  return;
+}
+
+void UsbHostMgr::onUsbDeviceConnected(int hub, int port)
+{
+  int item = devicesCount();
+  if( item == USB_HOSTMGR_MAX_DEVS )
+    return; //List full...
+  //Find a free address (not optimized, but not really important)
+  int i;
+  int addr = 1;
+  for(i = 0; i < item; i++)
+  {
+    addr = MAX( addr, m_lpDevices[i]->m_addr + 1 );
+  }
+  m_lpDevices[item] = new UsbDevice( this, hub, port, addr );
+  m_lpDevices[item]->m_connected = true;
+}
+
+void UsbHostMgr::onUsbDeviceDisconnected(int hub, int port)
+{
+  for(int i = 0; i < devicesCount(); i++)
+  {
+     if( (m_lpDevices[i]->m_hub == hub)
+     &&  (m_lpDevices[i]->m_port == port) )
+     {
+       m_lpDevices[i]->m_connected = false;
+       if(!m_lpDevices[i]->m_enumerated)
+       {
+         delete m_lpDevices[i];
+         m_lpDevices[i] = NULL;
+       }
+       return;
+     }
+  }
+}
+
+void UsbHostMgr::resetPort(int hub, int port)
+{
+  DBG("Resetting hub %d, port %d\n", hub, port);
+  if(hub == 0) //Root hub
+  {
+    wait_ms(100); /* USB 2.0 spec says at least 50ms delay before port reset */
+    LPC_USB->HcRhPortStatus1 = OR_RH_PORT_PRS; // Initiate port reset
+    DBG("Before loop\n");
+    while (LPC_USB->HcRhPortStatus1 & OR_RH_PORT_PRS)
+      ;
+    LPC_USB->HcRhPortStatus1 = OR_RH_PORT_PRSC; // ...and clear port reset signal
+    DBG("After loop\n");
+    wait_ms(200); /* Wait for 100 MS after port reset  */
+  }
+  else
+  {
+    //TODO: Hubs
+  }
+  DBG("Port reset OK\n");
+}
+
+#endif