/*FUNCTION*-------------------------------------------------------------
*
* Function Name : _usb_otg_khci_isr
* Returned Value : None
* Comments :
* Service all the interrupts in the kirin usb hardware
*END*-----------------------------------------------------------------*/
static void _usb_otg_khci_isr
(
void* otg_khci_call_ptr
)
{
usb_otg_state_struct_t * usb_otg_struct_ptr = ((usb_otg_khci_call_struct_t *)otg_khci_call_ptr)->otg_handle_ptr;
if (usb_otg_struct_ptr != NULL)
{
uint8_t otg_int_stat = (uint8_t)usb_hal_khci_get_otg_interrupt_status(g_usb_instance.instance);
uint8_t otg_stat = usb_hal_khci_get_otg_status(g_usb_instance.instance);
usb_otg_status_t *otg_status = &usb_otg_struct_ptr->otg_status;
/* Handle otg interrupt*/
if (otg_int_stat != 0)
{
/* Clear the OTG relevant interrupts */
usb_hal_khci_clr_otg_interrupt(g_usb_instance.instance,otg_int_stat);
if (otg_int_stat & USB_OTGISTAT_ONEMSEC_MASK)
{
otg_status->tmr_1ms = TRUE;
if ( otg_status->ms_since_line_changed < 0xffff )
{
otg_status->ms_since_line_changed++;
}
if ( otg_status->host_req_poll_timer < 0xffff )
{
otg_status->host_req_poll_timer++;
}
/* Decrement timeouts */
if (otg_status->b_timeout_en && otg_status->b_timeout)
{
otg_status->b_timeout--;
if (!otg_status->b_timeout)
{
otg_status->b_timeout_en = FALSE;
}
}
}
if ((otg_int_stat & USB_OTGISTAT_LINE_STATE_CHG_MASK) || (!(otg_stat & USB_OTGSTAT_LINESTATESTABLE_MASK)))
{
otg_status->ms_since_line_changed = 0;
}
}
/* Check active stack*/
if (otg_status->active_stack == USB_ACTIVE_STACK_HOST)
{
/* Host stack is current active stack */
/* Call function to handle host interrupt*/
_usb_host_khci_isr(NULL);
}
else if (otg_status->active_stack == USB_ACTIVE_STACK_DEVICE)
{
/* Device stack is current active stack */
/* Call function to handle device interrupt*/
if (usb_otg_struct_ptr->dev_inst_ptr != NULL)
{
_usb_dev_khci_isr(usb_otg_struct_ptr->dev_inst_ptr);
}
}
else
{
/* Clear all pending USB interrupt*/
usb_hal_khci_clr_all_interrupts(g_usb_instance.instance);
}
OS_Event_set(usb_otg_struct_ptr->otg_isr_event, USB_OTG_KHCI_ISR_EVENT);
}
}
/*FUNCTION*----------------------------------------------------------------
*
* Function Name : App_OtgCallback
* Returned Value : none
* Comments :
*
*
*END*--------------------------------------------------------------------*/
void App_OtgCallback(usb_otg_handle handle, uint32_t event)
{
(void)handle; /* not used */
if (event & OTG_B_IDLE)
{
g_dev_type = dev_b; /* Device type: B */
g_sess_vld = FALSE; /* session not valid */
g_otg_state = OTG_B_IDLE;
}
if (event & OTG_B_IDLE_SRP_READY)
{
g_otg_state = OTG_B_IDLE_SRP_READY;
}
if (event & OTG_B_PERIPHERAL)
{
g_otg_state = OTG_B_PERIPHERAL;
if (g_sess_vld == FALSE)
{
g_sess_vld = TRUE; /* session valid */
}
}
if (event & OTG_B_HOST)
{
g_otg_state = OTG_B_HOST;
}
if (event & OTG_B_A_HNP_REQ)
{
(void)_usb_otg_bus_release(g_otg_handle);
}
if (event & OTG_A_WAIT_BCON_TMOUT)
{
_usb_otg_set_a_bus_req(g_otg_handle , FALSE);
}
if (event & OTG_A_BIDL_ADIS_TMOUT)
{
_usb_otg_set_a_bus_req(g_otg_handle, TRUE);
}
if (event & OTG_A_B_HNP_REQ)
{
_usb_otg_set_a_bus_req( handle , FALSE);
}
if (event & OTG_A_IDLE)
{
g_dev_type = dev_a; /* Device type: A */
g_sess_vld = FALSE;
g_otg_state = OTG_A_IDLE;
}
if (event & OTG_A_WAIT_VRISE)
{
g_otg_state = OTG_A_WAIT_VRISE;
_usb_otg_set_a_bus_req( handle , TRUE);
}
if (event & OTG_A_WAIT_BCON)
{
g_sess_vld = TRUE;
g_otg_state = OTG_A_WAIT_BCON;
}
if (event & OTG_A_HOST)
{
g_otg_state = OTG_A_HOST;
}
if (event & OTG_A_SUSPEND)
{
g_otg_state = OTG_A_SUSPEND;
}
if (event & OTG_A_PERIPHERAL)
{
g_otg_state = OTG_A_PERIPHERAL;
}
if (event & OTG_A_WAIT_VFALL)
{
if (g_vbus_err == TRUE)
{
g_vbus_err = FALSE;
}
g_otg_state = OTG_A_WAIT_VFALL;
}
if (event & OTG_A_VBUS_ERR)
{
g_vbus_err = TRUE;
g_otg_state = OTG_A_VBUS_ERR;
}
OS_Event_set(g_otg_app_event_handle, event);
}
/*FUNCTION*----------------------------------------------------------------
*
* Function Name : usb_host_hid_keyboard_event
* Returned Value : None
* Comments :
* Called when HID device has been attached, detached, etc.
*END*--------------------------------------------------------------------*/
void usb_host_hid_keyboard_event(
/* [IN] pointer to device instance */
usb_device_instance_handle dev_handle,
/* [IN] pointer to interface descriptor */
usb_interface_descriptor_handle intf_handle,
/* [IN] code number for event causing callback */
uint32_t event_code)
{
usb_device_interface_struct_t* pHostIntf = (usb_device_interface_struct_t*)intf_handle;
interface_descriptor_t* intf_ptr = pHostIntf->lpinterfaceDesc;
usb_status status = USB_OK;
//fflush(stdout);
switch (event_code) {
case USB_ATTACH_EVENT:
g_interface_info[g_interface_number] = pHostIntf;
g_interface_number++;
printf("HID State = %d", g_kbd_hid_device.dev_state);
printf("HID Class = %d", intf_ptr->bInterfaceClass);
printf("HID SubClass = %d", intf_ptr->bInterfaceSubClass);
printf("HID Protocol = %d\n", intf_ptr->bInterfaceProtocol);
break;
/* Drop through config event for the same processing */
case USB_CONFIG_EVENT:
//fflush(stdout);
printf("HID State = USB_CONFIG_EVENT");
if(g_kbd_hid_device.dev_state == USB_DEVICE_IDLE)
{
g_kbd_hid_device.dev_handle = dev_handle;
g_kbd_hid_device.intf_handle = hid_get_interface();;
g_kbd_hid_device.dev_state = USB_DEVICE_CONFIGURED;
}
else
{
printf("HID device already attached\n");
//fflush(stdout);
}
break;
case USB_INTF_OPENED_EVENT:
printf("HID State = USB_INTF_OPENED_EVENT");
g_kbd_hid_device.dev_state = USB_DEVICE_INTERFACED;
OS_Event_set(usb_keyboard_event, USB_Keyboard_Event_CTRL);
break;
case USB_DETACH_EVENT:
/* Use only the interface with desired protocol */
g_interface_number = 0;
if (g_kbd_hid_device.dev_state < USB_DEVICE_INTERFACED)
{
g_kbd_hid_device.dev_handle = NULL;
g_kbd_hid_device.intf_handle = NULL;
g_kbd_hid_device.dev_state = USB_DEVICE_IDLE;
return;
}
printf("\n----- Detach Event -----\n");
printf("State = %d", g_kbd_hid_device.dev_state);
printf(" Class = %d", intf_ptr->bInterfaceClass);
printf(" SubClass = %d", intf_ptr->bInterfaceSubClass);
printf(" Protocol = %d\n", intf_ptr->bInterfaceProtocol);
//fflush(stdout);
status = usb_host_close_dev_interface(host_handle, g_kbd_hid_device.dev_handle, g_kbd_hid_device.intf_handle, g_kbd_hid_device.class_handle);
if (status != USB_OK)
{
printf("error in _usb_hostdev_close_interface %x\n", status);
}
g_kbd_hid_device.dev_handle = NULL;
g_kbd_hid_device.intf_handle = NULL;
g_kbd_hid_device.dev_state = USB_DEVICE_IDLE;
OS_Event_set(usb_keyboard_event, USB_Keyboard_Event_CTRL);
break;
}
}
void APP_init(void)
{
usb_status status = USB_OK;
uint32_t opt = 0;
status = usb_host_init(CONTROLLER_ID, usb_host_board_init, &g_host_handle);
if (status != USB_OK)
{
USB_PRINTF("\r\nUSB Host Initialization failed! STATUS: 0x%x", status);
return;
}
/*
** since we are going to act as the host driver, register the driver
** information for wanted class/subclass/protocols
*/
status = usb_host_register_driver_info(g_host_handle, (void *) DriverInfoTable);
if (status != USB_OK)
{
USB_PRINTF("\r\nUSB Initialization driver info failed! STATUS: 0x%x", status);
return;
}
status = usb_host_register_unsupported_device_notify(g_host_handle, usb_host_hid_unsupported_device_event);
if (status != USB_OK)
{
USB_PRINTF("\r\nUSB Initialization driver info failed! STATUS: 0x%x", status);
return;
}
mouse_usb_event = OS_Event_create(0);/* manually clear */
if (mouse_usb_event == NULL)
{
USB_PRINTF("mouse_usb_event create failed\r\n");
return;
}
mouse_hid_com = (hid_command_t*) OS_Mem_alloc_zero(sizeof(hid_command_t));
if (mouse_hid_com == NULL)
{
USB_PRINTF("mouse_hid_com create failed\r\n");
return;
}
kbd_usb_event = OS_Event_create(0);/* manually clear */
if (kbd_usb_event == NULL)
{
USB_PRINTF("kbd_usb_event create failed\r\n");
return;
}
OS_Event_set(kbd_usb_event, USB_EVEN_INIT);
kbd_hid_com = (hid_command_t*) OS_Mem_alloc_zero(sizeof(hid_command_t));
if (kbd_hid_com == NULL)
{
USB_PRINTF("kbd_hid_com create failed\r\n");
return;
}
if ((uint32_t) OS_TASK_ERROR == OS_Task_create(USB_KEYBOARD_TASK_ADDRESS, (void*) g_host_handle, (uint32_t) USB_KEYBOARD_TASK_PRIORITY, USB_KEYBOARD_TASK_STACKSIZE, USB_KEYBOARD_TASK_NAME, &opt))
{
USB_PRINTF("keyboard task create failed\r\n");
return;
}
if ((uint32_t) OS_TASK_ERROR == OS_Task_create(USB_MOUSE_TASK_ADDRESS, (void*) g_host_handle, (uint32_t) USB_MOUSE_TASK_PRIORITY, USB_MOUSE_TASK_STACKSIZE, USB_MOUSE_TASK_NAME, &opt))
{
USB_PRINTF("mouse task create failed\r\n");
return;
}
time_init();
USB_PRINTF("\fUSB HID Mouse+Keyboard\r\nWaiting for USB Mouse or Keyboard to be attached...\r\n");
}
/*
usb_host_video_stream_event
*/
void usb_host_video_stream_event
(
/* [IN] pointer to device instance */
usb_device_instance_handle dev_handle,
/* [IN] pointer to interface descriptor */
usb_interface_descriptor_handle intf_handle,
/* [IN] code number for event causing callback */
uint32_t event_code
)
{
usb_device_interface_struct_t* pHostIntf = (usb_device_interface_struct_t*)intf_handle;
interface_descriptor_t* intf_ptr = pHostIntf->lpinterfaceDesc;
switch (event_code)
{
case USB_ATTACH_EVENT:
g_video_camera.interface_ptr[g_video_camera.interface_number] = pHostIntf;
g_video_camera.interface_type[g_video_camera.interface_number] = USB_SUBCLASS_VIDEO_STREAMING;
g_video_camera.interface_number++;
USB_PRINTF("----- Attach Event -----\r\n");
USB_PRINTF("State = %d", g_video_camera.stream_state);
USB_PRINTF(" Interface Number = %d", intf_ptr->bInterfaceNumber);
USB_PRINTF(" Alternate Setting = %d", intf_ptr->bAlternateSetting);
USB_PRINTF(" Class = %d", intf_ptr->bInterfaceClass);
USB_PRINTF(" SubClass = %d", intf_ptr->bInterfaceSubClass);
USB_PRINTF(" Protocol = %d\r\n", intf_ptr->bInterfaceProtocol);
break;
case USB_CONFIG_EVENT:
if(g_video_camera.stream_state == USB_DEVICE_IDLE)
{
if ((NULL != g_video_camera.dev_handle) && (g_video_camera.dev_handle != dev_handle))
{
USB_PRINTF("Video device already attached - Control DEV_STATE = %d\r\n", g_video_camera.control_state);
USB_PRINTF("Video device already attached - Stream DEV_STATE = %d\r\n", g_video_camera.stream_state);
return;
}
g_video_camera.dev_handle = dev_handle;
for(int i = 0;i < g_video_camera.interface_number;i++)
{
if(g_video_camera.interface_type[i] == USB_SUBCLASS_VIDEO_STREAMING)
{
g_video_camera.stream_intf_handle = g_video_camera.interface_ptr[i];
break;
}
}
g_video_camera.stream_state = USB_DEVICE_ATTACHED;
}
else
{
USB_PRINTF("Video device already attached - Stream DEV_STATE = %d\r\n", g_video_camera.stream_state);
}
break;
case USB_INTF_OPENED_EVENT:
USB_PRINTF("----- Interfaced Event -----\r\n");
g_video_camera.stream_state = USB_DEVICE_INTERFACE_OPENED;
break;
case USB_DETACH_EVENT:
/* Use only the interface with desired protocol */
USB_PRINTF("\r\n----- Detach Event -----\r\n");
USB_PRINTF("State = %d", g_video_camera.stream_state);
USB_PRINTF(" Interface Number = %d", intf_ptr->bInterfaceNumber);
USB_PRINTF(" Alternate Setting = %d", intf_ptr->bAlternateSetting);
USB_PRINTF(" Class = %d", intf_ptr->bInterfaceClass);
USB_PRINTF(" SubClass = %d", intf_ptr->bInterfaceSubClass);
USB_PRINTF(" Protocol = %d\r\n", intf_ptr->bInterfaceProtocol);
g_video_camera.interface_number --;
g_video_camera.stream_state = USB_DEVICE_DETACHED;
break;
default:
USB_PRINTF("Video Device state = %d??\r\n", g_video_camera.stream_state);
g_video_camera.stream_state = USB_DEVICE_IDLE;
break;
}
/* notify application that status has changed */
OS_Event_set(g_video_camera.video_camera_stream_event, USB_EVENT_CTRL);
}
/*FUNCTION*-------------------------------------------------------------------
*
* Function Name : _usb_otg_sm_b
* Returned Value :
* Comments : This function handles the substates of the B-state machine
*
*
*END*----------------------------------------------------------------------*/
void _usb_otg_sm_b
(
usb_otg_handle otg_handle
)
{
usb_otg_state_struct_t * usb_otg_struct_ptr = (usb_otg_state_struct_t *)otg_handle;
usb_otg_status_t *otg_status = &usb_otg_struct_ptr->otg_status;
if (!otg_status->id)
{
_usb_otg_id_chg_a(otg_handle);
return;
}
switch (usb_otg_struct_ptr->sub_state)
{
case USB_OTG_SM_B_IDLE_SESS_DETECT:
usb_otg_struct_ptr->hnp_enabled = FALSE;
if (otg_status->sess_valid)
{
_usb_otg_sm_b_substate_change(otg_handle, USB_OTG_SM_B_PERI_BUS_SUSP_DETECT, OTG_B_PERIPHERAL);
}
else
{
/* Disable pull-up. The B-Device is now in the B-Idle state */
_usb_otg_callback_set_dp_pull_up(otg_handle, FALSE);
if (otg_status->sess_end)
{
usb_otg_struct_ptr->sub_state = USB_OTG_SM_B_IDLE_SESS_END_DETECT;
otg_status->b_timeout = TB_SESSEND_SRP; /* Program the SRP detect timeout as SESSEND SRP */
}
}
break;
case USB_OTG_SM_B_IDLE_SESS_END_DETECT:
if (otg_status->sess_valid)
{
_usb_otg_sm_b_substate_change(otg_handle, USB_OTG_SM_B_PERI_BUS_SUSP_DETECT, OTG_B_PERIPHERAL);
}
else
{
/* Read the Live SE0 bit */
if ((otg_status->live_se0) && (otg_status->line_stable))
{
otg_status->b_timeout_en = TRUE;
usb_otg_struct_ptr->sub_state = USB_OTG_SM_B_IDLE_SE0_STABLE_WAIT;
}
}
break;
case USB_OTG_SM_B_IDLE_SE0_STABLE_WAIT:
if (otg_status->sess_valid)
{
_usb_otg_sm_b_substate_change(otg_handle, USB_OTG_SM_B_PERI_BUS_SUSP_DETECT, OTG_B_PERIPHERAL);
}
else
{
/* Line state change. restart SE0 detection */
if (!otg_status->line_stable)
{
otg_status->b_timeout_en = TRUE;
otg_status->b_timeout = TB_SE0_SRP; /* reinitialize the the SE0 detect timer */
/* Keep the current state */
}
else
{
if (otg_status->b_timeout == 0)
{
/* The timeout expired during stable SE0 */
_usb_otg_sm_b_substate_change(otg_handle, USB_OTG_SM_B_IDLE_SRP_START_ARMED, OTG_B_IDLE_SRP_READY);
}
}
}
break;
case USB_OTG_SM_B_IDLE_SRP_START_ARMED:
if (otg_status->sess_valid)
{
_usb_otg_sm_b_substate_change(otg_handle, USB_OTG_SM_B_PERI_BUS_SUSP_DETECT, OTG_B_PERIPHERAL);
}
else
{
/* Line state change. restart SE0 detection */
if (!otg_status->line_stable)
{
otg_status->b_timeout = TB_SE0_SRP; /* reinitialize the the SE0 detect timer */
usb_otg_struct_ptr->sub_state = USB_OTG_SM_B_IDLE_SESS_END_DETECT;
}
else
{
if (usb_otg_struct_ptr->srp_request || usb_otg_struct_ptr->power_up)
{
usb_otg_struct_ptr->power_up = FALSE;
usb_otg_struct_ptr->srp_request = FALSE;
/* Start SRP */
/* Start the D+ pulsing timeout */
otg_status->b_timeout = TB_DATA_PLS; /* reinitialize the the SE0 detect timer */
otg_status->b_timeout_en = TRUE;
/* Enable D+ pullup */
_usb_otg_callback_set_dp_pull_up(otg_handle, TRUE);
usb_otg_struct_ptr->sub_state = USB_OTG_SM_B_SRP_PULSE;
}
}
}
break;
case USB_OTG_SM_B_SRP_PULSE:
if (otg_status->b_timeout == 0)
{
/* The timeout expired. Remove the D+ pullup */
_usb_otg_callback_set_dp_pull_up(otg_handle, FALSE);
/* Wait for VBUS */
otg_status->b_timeout = (TB_SRP_FAIL - TB_DATA_PLS);
otg_status->b_timeout_en = TRUE;
usb_otg_struct_ptr->sub_state = USB_OTG_SM_B_SRP_VBUS_WAIT;
/* Signal the event to the application */
OS_Event_set((usb_otg_struct_ptr->otg_app_event), OTG_B_SRP_INIT);
}
break;
case USB_OTG_SM_B_SRP_VBUS_WAIT:
if (otg_status->sess_valid)
{
_usb_otg_sm_b_substate_change(otg_handle, USB_OTG_SM_B_PERI_BUS_SUSP_DETECT, OTG_B_PERIPHERAL);
}
else
{
if (otg_status->b_timeout == 0)
{
/* The timeout expired during VBUS wait */
/* Inform the application about the failed SRP and return to idle state */
/* and wait for SE0 condition on the bus to be able to restart the SRP */
usb_otg_struct_ptr->sub_state = USB_OTG_SM_B_IDLE_SE0_STABLE_WAIT;
otg_status->b_timeout_en = TRUE;
otg_status->b_timeout = TB_SE0_SRP; /* reinitialize the the SE0 detect timer */
/* Signal the event to the application */
OS_Event_set((usb_otg_struct_ptr->otg_app_event), OTG_B_SRP_FAIL);
}
}
break;
case USB_OTG_SM_B_PERI_BUS_SUSP_DETECT:
if (!otg_status->sess_valid)
{
_usb_otg_sm_b_substate_change(otg_handle, USB_OTG_SM_B_IDLE_SESS_DETECT, OTG_B_IDLE);
}
else
{
/* Enable the D+ pull-up. the B device is in the peripheral state */
_usb_otg_callback_set_dp_pull_up(otg_handle, TRUE);
usb_otg_struct_ptr->power_up = FALSE;
/* Start monitoring the data lines.
* If the bus has inactivity for more than TB_AIDL_BDIS, then the A is considered disconnected and B can start HNP
*/
usb_otg_struct_ptr->sub_state = USB_OTG_SM_B_PERI_BUS_SUSP_WAIT;
otg_status->b_timeout_en = TRUE;
otg_status->b_timeout = TB_AIDL_BDIS; /* reinitialize the IDLE detect timer */
}
break;
case USB_OTG_SM_B_PERI_BUS_SUSP_WAIT:
if (!otg_status->sess_valid)
{
_usb_otg_sm_b_substate_change(otg_handle, USB_OTG_SM_B_IDLE_SESS_DETECT, OTG_B_IDLE);
}
else
{
if (!otg_status->line_stable)
{
/* Restart detection */
otg_status->b_timeout_en = TRUE;
otg_status->b_timeout = TB_AIDL_BDIS; /* reinitialize the IDLE detect timer */
}
else
{
if ((usb_otg_struct_ptr->hnp_enabled) && (otg_status->b_timeout == 0))
{
usb_otg_struct_ptr->sub_state = USB_OTG_SM_B_PERI_HNP_ARMED;
/* Signal the event to the application */
OS_Event_set((usb_otg_struct_ptr->otg_app_event), OTG_B_PERIPHERAL_HNP_READY);
}
}
}
break;
case USB_OTG_SM_B_PERI_HNP_ARMED:
if (!otg_status->sess_valid)
{
_usb_otg_sm_b_substate_change(otg_handle, USB_OTG_SM_B_IDLE_SESS_DETECT, OTG_B_IDLE);
}
else
{
if ((!otg_status->line_stable) || (!usb_otg_struct_ptr->hnp_enabled))
{
_usb_otg_sm_b_substate_change(otg_handle, USB_OTG_SM_B_PERI_BUS_SUSP_DETECT, OTG_B_PERIPHERAL_HNP_FAIL);
}
else
{
if ((usb_otg_struct_ptr->bus_request) && (usb_otg_struct_ptr->hnp_enabled))
{
usb_otg_struct_ptr->bus_request = FALSE;
/* Clear the Status at the USB device level */
_usb_device_set_status(usb_otg_struct_ptr->dev_inst_ptr, USB_STATUS_OTG, USB_STATUS_IDLE);
/* Start HNP. Turn off Pull-Up on D+ for the Host to detect SE0 */
_usb_otg_callback_set_dp_pull_up(otg_handle, FALSE);
/* Wait for data line to discharge (25us) */
otg_status->b_timeout = 1;
otg_status->b_timeout_en = TRUE;
usb_otg_struct_ptr->sub_state = USB_OTG_SM_B_PERI_HNP_START;
/* Signal the event to the application */
OS_Event_set ((usb_otg_struct_ptr->otg_app_event), OTG_B_PERIPHERAL_HNP_START);
}
}
}
break;
case USB_OTG_SM_B_PERI_HNP_START:
if (!otg_status->sess_valid)
{
_usb_otg_sm_b_substate_change(otg_handle, USB_OTG_SM_B_IDLE_SESS_DETECT, OTG_B_IDLE);
}
else
{
if (otg_status->b_timeout == 0)
{
/* Line should have discharged by now */
/* Start the host disconnect detect */
otg_status->b_timeout = TB_ASE0_BRST;
otg_status->b_timeout_en = TRUE;
usb_otg_struct_ptr->sub_state = USB_OTG_SM_B_PERI_HNP_ACONN;
}
}
break;
case USB_OTG_SM_B_PERI_HNP_ACONN:
if (!otg_status->sess_valid)
{
_usb_otg_sm_b_substate_change(otg_handle, USB_OTG_SM_B_IDLE_SESS_DETECT, OTG_B_IDLE);
}
else
{
if (otg_status->b_timeout == 0)
{
/* A connect timeout detected. Go back to peripheral state */
_usb_otg_sm_b_substate_change(otg_handle, USB_OTG_SM_B_PERI_BUS_SUSP_DETECT, OTG_B_PERIPHERAL_HNP_FAIL);
}
else
{
/* Check the Data line state */
if ((!otg_status->live_se0) && (otg_status->live_jstate) && (otg_status->line_stable))
{
/* J-STATE. Host has been released */
/* Enter the B-Host state */
usb_otg_struct_ptr->hnp_enabled = FALSE;
otg_status->a_conn = TRUE;
_usb_otg_sm_b_substate_change(otg_handle, USB_OTG_SM_B_HOST, OTG_B_HOST);
}
else
{
if ((!otg_status->live_se0) && (!otg_status->live_jstate) && (otg_status->line_stable))
{
/* Host has retained the bus */
_usb_otg_sm_b_substate_change(otg_handle, USB_OTG_SM_B_PERI_BUS_SUSP_DETECT, OTG_B_PERIPHERAL_HNP_FAIL);
}
}
}
}
break;
case USB_OTG_SM_B_HOST:
if (!otg_status->sess_valid)
{
otg_status->a_conn = FALSE;
_usb_otg_sm_b_substate_change(otg_handle, USB_OTG_SM_B_IDLE_SESS_DETECT, OTG_B_IDLE);
}
else
{
if ((otg_status->a_conn == FALSE) || usb_otg_struct_ptr->bus_release)
{
usb_otg_struct_ptr->bus_release = FALSE;
otg_status->a_conn = FALSE;
/* A-device disconnected or B has finished using the bus */
_usb_otg_sm_b_substate_change(otg_handle, USB_OTG_SM_B_PERI_BUS_SUSP_DETECT, OTG_B_PERIPHERAL);
}
else
{
if ( usb_otg_struct_ptr->dev_inst_ptr != NULL )
{
if (otg_status->hnp_req)
{
OS_Event_set((usb_otg_struct_ptr->otg_app_event), OTG_B_A_HNP_REQ);
}
if (otg_status->hnp_support && (otg_status->host_req_poll_timer >= T_HOST_REQ_POLL))
{
otg_status->host_req_poll_timer = 0;
_usb_otg_hnp_poll_req(usb_otg_struct_ptr);
}
}
}
}
break;
default: break;
}
}
