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hid host skip get report descriptor if too large instead of assert

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This commit is contained in:
hathach
2021-08-20 18:26:56 +07:00
parent 1cef2b6a42
commit 62f2efbe8c
4 changed files with 43 additions and 25 deletions
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62
src/class/hid/hid_host.c
View File

@@ -247,6 +247,8 @@ static bool config_set_protocol (uint8_t dev_addr, tusb_control_requ
static bool config_get_report_desc (uint8_t dev_addr, tusb_control_request_t const * request, xfer_result_t result);
static bool config_get_report_desc_complete (uint8_t dev_addr, tusb_control_request_t const * request, xfer_result_t result);
static void config_driver_mount_complete(uint8_t dev_addr, uint8_t instance, uint8_t const* desc_report, uint16_t desc_len);
uint16_t hidh_open(uint8_t rhport, uint8_t dev_addr, tusb_desc_interface_t const *desc_itf, uint16_t max_len)
{
(void) max_len;
@@ -367,26 +369,34 @@ static bool config_get_report_desc(uint8_t dev_addr, tusb_control_request_t cons
uint8_t const instance = get_instance_id_by_itfnum(dev_addr, itf_num);
hidh_interface_t* hid_itf = get_instance(dev_addr, instance);
// Get Report Descriptor
// Get Report Descriptor if possible
// using usbh enumeration buffer since report descriptor can be very long
TU_ASSERT( hid_itf->report_desc_len <= CFG_TUH_ENUMERATION_BUFSIZE );
TU_LOG2("HID Get Report Descriptor\r\n");
tusb_control_request_t const new_request =
if( hid_itf->report_desc_len > CFG_TUH_ENUMERATION_BUFSIZE )
{
.bmRequestType_bit =
{
.recipient = TUSB_REQ_RCPT_INTERFACE,
.type = TUSB_REQ_TYPE_STANDARD,
.direction = TUSB_DIR_IN
},
.bRequest = TUSB_REQ_GET_DESCRIPTOR,
.wValue = tu_u16(hid_itf->report_desc_type, 0),
.wIndex = itf_num,
.wLength = hid_itf->report_desc_len
};
TU_LOG2("HID Skip Report Descriptor since it is too large %u bytes\r\n", hid_itf->report_desc_len);
// Driver is mounted without report descriptor
config_driver_mount_complete(dev_addr, instance, NULL, 0);
}else
{
TU_LOG2("HID Get Report Descriptor\r\n");
tusb_control_request_t const new_request =
{
.bmRequestType_bit =
{
.recipient = TUSB_REQ_RCPT_INTERFACE,
.type = TUSB_REQ_TYPE_STANDARD,
.direction = TUSB_DIR_IN
},
.bRequest = TUSB_REQ_GET_DESCRIPTOR,
.wValue = tu_u16(hid_itf->report_desc_type, 0),
.wIndex = itf_num,
.wLength = hid_itf->report_desc_len
};
TU_ASSERT(tuh_control_xfer(dev_addr, &new_request, usbh_get_enum_buf(), config_get_report_desc_complete));
}
TU_ASSERT(tuh_control_xfer(dev_addr, &new_request, usbh_get_enum_buf(), config_get_report_desc_complete));
return true;
}
@@ -394,13 +404,21 @@ static bool config_get_report_desc_complete(uint8_t dev_addr, tusb_control_reque
{
TU_ASSERT(XFER_RESULT_SUCCESS == result);
uint8_t const itf_num = (uint8_t) request->wIndex;
uint8_t const instance = get_instance_id_by_itfnum(dev_addr, itf_num);
hidh_interface_t* hid_itf = get_instance(dev_addr, instance);
uint8_t const itf_num = (uint8_t) request->wIndex;
uint8_t const instance = get_instance_id_by_itfnum(dev_addr, itf_num);
uint8_t const* desc_report = usbh_get_enum_buf();
uint16_t const desc_len = request->wLength;
config_driver_mount_complete(dev_addr, instance, desc_report, desc_len);
return true;
}
static void config_driver_mount_complete(uint8_t dev_addr, uint8_t instance, uint8_t const* desc_report, uint16_t desc_len)
{
hidh_interface_t* hid_itf = get_instance(dev_addr, instance);
// enumeration is complete
tuh_hid_mount_cb(dev_addr, instance, desc_report, desc_len);
@@ -408,9 +426,7 @@ static bool config_get_report_desc_complete(uint8_t dev_addr, tusb_control_reque
hidh_get_report(dev_addr, hid_itf);
// notify usbh that driver enumeration is complete
usbh_driver_set_config_complete(dev_addr, itf_num);
return true;
usbh_driver_set_config_complete(dev_addr, hid_itf->itf_num);
}
//--------------------------------------------------------------------+

2
src/class/hid/hid_host.h
View File

@@ -97,6 +97,8 @@ uint8_t tuh_hid_parse_report_descriptor(tuh_hid_report_info_t* reports_info_arr,
// Invoked when device with hid interface is mounted
// Report descriptor is also available for use. tuh_hid_parse_report_descriptor()
// can be used to parse common/simple enough descriptor.
// Note: if report descriptor length > CFG_TUH_ENUMERATION_BUFSIZE, it will be skipped
// therefore report_desc = NULL, desc_len = 0
void tuh_hid_mount_cb(uint8_t dev_addr, uint8_t instance, uint8_t const* report_desc, uint16_t desc_len);
// Invoked when device with hid interface is un-mounted