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hack: force/overwrite endpoint mps to 64 for device that incorrectly report 512 bytes for bulk in fullspeed mode.

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hathach
2025-03-06 11:03:47 +07:00
parent 39e6375b74
commit ee234a84ca
5 changed files with 18 additions and 9 deletions
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15
src/tusb.c
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@@ -205,7 +205,7 @@ bool tu_edpt_release(tu_edpt_state_t* ep_state, osal_mutex_t mutex) {
return ret;
}
bool tu_edpt_validate(tusb_desc_endpoint_t const* desc_ep, tusb_speed_t speed) {
bool tu_edpt_validate(tusb_desc_endpoint_t const* desc_ep, tusb_speed_t speed, bool is_host) {
uint16_t const max_packet_size = tu_edpt_packet_size(desc_ep);
TU_LOG2(" Open EP %02X with Size = %u\r\n", desc_ep->bEndpointAddress, max_packet_size);
@@ -221,8 +221,17 @@ bool tu_edpt_validate(tusb_desc_endpoint_t const* desc_ep, tusb_speed_t speed) {
// Bulk highspeed must be EXACTLY 512
TU_ASSERT(max_packet_size == 512);
} else {
// TODO Bulk fullspeed can only be 8, 16, 32, 64
TU_ASSERT(max_packet_size <= 64);
// Bulk fullspeed can only be 8, 16, 32, 64
if (is_host && max_packet_size == 512) {
// HACK: while in host mode, some device incorrectly always report 512 regardless of link speed
// overwrite descriptor to force 64
TU_LOG1(" WARN: EP max packet size is 512 in fullspeed, force to 64\r\n");
tusb_desc_endpoint_t* hacked_ep = (tusb_desc_endpoint_t*) (uintptr_t) desc_ep;
hacked_ep->wMaxPacketSize = tu_htole16(64);
} else {
TU_ASSERT(max_packet_size == 8 || max_packet_size == 16 ||
max_packet_size == 32 || max_packet_size == 64);
}
}
break;