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refactor extract parse_configuration_descriptor()

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This commit is contained in:
hathach 2020-09-05 15:16:45 +07:00
parent d87f2a9691
commit bc09b6065f
1 changed files with 61 additions and 52 deletions
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113
src/host/usbh.c
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@ -366,6 +366,64 @@ static void usbh_device_unplugged(uint8_t rhport, uint8_t hub_addr, uint8_t hub_
//--------------------------------------------------------------------+
// ENUMERATION TASK
//--------------------------------------------------------------------+
static bool parse_configuration_descriptor(uint8_t dev_addr, tusb_desc_configuration_t const* desc_cfg)
{
usbh_device_t* dev = &_usbh_devices[dev_addr];
uint8_t const* p_desc = (uint8_t const*) desc_cfg;
p_desc = tu_desc_next(p_desc);
TU_LOG2_MEM(desc_cfg, desc_cfg->wTotalLength, 0);
// parse each interfaces
while( p_desc < _usbh_ctrl_buf + desc_cfg->wTotalLength )
{
// skip until we see interface descriptor
if ( TUSB_DESC_INTERFACE != tu_desc_type(p_desc) )
{
p_desc = tu_desc_next(p_desc); // skip the descriptor, increase by the descriptor's length
}else
{
tusb_desc_interface_t const* desc_itf = (tusb_desc_interface_t const*) p_desc;
// Check if class is supported
uint8_t drv_id;
for (drv_id = 0; drv_id < USBH_CLASS_DRIVER_COUNT; drv_id++)
{
if ( usbh_class_drivers[drv_id].class_code == desc_itf->bInterfaceClass ) break;
}
if( drv_id >= USBH_CLASS_DRIVER_COUNT )
{
// skip unsupported class
p_desc = tu_desc_next(p_desc);
}
else
{
// Interface number must not be used already TODO alternate interface
TU_ASSERT( dev->itf2drv[desc_itf->bInterfaceNumber] == 0xff );
dev->itf2drv[desc_itf->bInterfaceNumber] = drv_id;
if (desc_itf->bInterfaceClass == TUSB_CLASS_HUB && dev->hub_addr != 0)
{
// TODO Attach hub to Hub is not currently supported
// skip this interface
p_desc = tu_desc_next(p_desc);
}
else
{
uint16_t itf_len = 0;
TU_LOG2("%s open\r\n", usbh_class_drivers[drv_id].name);
TU_ASSERT( usbh_class_drivers[drv_id].open(dev->rhport, dev_addr, desc_itf, &itf_len) );
TU_ASSERT( itf_len >= sizeof(tusb_desc_interface_t) );
p_desc += itf_len;
}
}
}
}
return true;
}
bool enum_task(hcd_event_t* event)
{
@ -585,59 +643,10 @@ bool enum_task(hcd_event_t* event)
//------------- TODO Get String Descriptors -------------//
//------------- parse configuration & install drivers -------------//
uint8_t const* p_desc = _usbh_ctrl_buf + sizeof(tusb_desc_configuration_t);
// TU_LOG2_MEM(_usbh_ctrl_buf, ((tusb_desc_configuration_t*)_usbh_ctrl_buf)->wTotalLength, 0);
// parse each interfaces
while( p_desc < _usbh_ctrl_buf + ((tusb_desc_configuration_t*)_usbh_ctrl_buf)->wTotalLength )
{
// skip until we see interface descriptor
if ( TUSB_DESC_INTERFACE != tu_desc_type(p_desc) )
{
p_desc = tu_desc_next(p_desc); // skip the descriptor, increase by the descriptor's length
}else
{
tusb_desc_interface_t const* desc_itf = (tusb_desc_interface_t const*) p_desc;
// Check if class is supported
uint8_t drv_id;
for (drv_id = 0; drv_id < USBH_CLASS_DRIVER_COUNT; drv_id++)
{
if ( usbh_class_drivers[drv_id].class_code == desc_itf->bInterfaceClass ) break;
}
if( drv_id >= USBH_CLASS_DRIVER_COUNT )
{
// skip unsupported class
p_desc = tu_desc_next(p_desc);
}
else
{
// Interface number must not be used already TODO alternate interface
TU_ASSERT( new_dev->itf2drv[desc_itf->bInterfaceNumber] == 0xff );
new_dev->itf2drv[desc_itf->bInterfaceNumber] = drv_id;
if (desc_itf->bInterfaceClass == TUSB_CLASS_HUB && new_dev->hub_addr != 0)
{
// TODO Attach hub to Hub is not currently supported
// skip this interface
p_desc = tu_desc_next(p_desc);
}
else
{
uint16_t itf_len = 0;
TU_LOG2("%s open\r\n", usbh_class_drivers[drv_id].name);
TU_ASSERT( usbh_class_drivers[drv_id].open(new_dev->rhport, new_addr, desc_itf, &itf_len) );
TU_ASSERT( itf_len >= sizeof(tusb_desc_interface_t) );
p_desc += itf_len;
}
}
}
}
// Parse configuration & set up drivers
parse_configuration_descriptor(new_addr, (tusb_desc_configuration_t*) _usbh_ctrl_buf);
// Invoke callback if available
if (tuh_mount_cb) tuh_mount_cb(new_addr);
return true;