andy/tinyUSB
1
0
Fork 0
Code Issues Pull Requests Actions 1 Packages Projects Releases Wiki Activity

- only abort ep0 if it is active

Browse Source 
- rename reset_ep0_pid() to reset_ep0()
- minor update log message
This commit is contained in:
hathach
2024-03-13 11:41:58 +07:00
parent 2f0ad918cc
commit 6dc714b6de
2 changed files with 35 additions and 68 deletions
Download Patch File Download Diff File Expand all files Collapse all files

68
src/portable/raspberrypi/rp2040/dcd_rp2040.c
View File

@@ -60,7 +60,7 @@ TU_ATTR_ALWAYS_INLINE static inline struct hw_endpoint* hw_endpoint_get_by_num(u
return &hw_endpoints[num][dir];
}
static struct hw_endpoint* hw_endpoint_get_by_addr(uint8_t ep_addr) {
TU_ATTR_ALWAYS_INLINE static inline struct hw_endpoint* hw_endpoint_get_by_addr(uint8_t ep_addr) {
uint8_t num = tu_edpt_number(ep_addr);
tusb_dir_t dir = tu_edpt_dir(ep_addr);
return hw_endpoint_get_by_num(num, dir);
@@ -192,47 +192,31 @@ static void __tusb_irq_path_func(hw_handle_buff_status)(void) {
}
}
TU_ATTR_ALWAYS_INLINE static inline void reset_ep0_pid(void)
{
// Abort any transactions from a prior control transfer, because
// receiving SETUP doesn't reset buffer control state. This works around
// a possible USB hardware erratum.
TU_ATTR_ALWAYS_INLINE static inline void reset_ep0(void) {
// If we have finished this transfer on EP0 set pid back to 1 for next
// setup transfer. Also clear a stall in case
for (uint8_t dir = 0; dir < 2; dir++) {
struct hw_endpoint* ep = hw_endpoint_get_by_num(0, dir);
if (ep->active) {
// Abort any pending transfer from a prior control transfer per USB specs
// Due to Errata RP2040-E2: ABORT flag is only applicable for B2 and later (unusable for B0, B1).
// Which means we are not guaranteed to safely abort pending transfer on B0 and B1.
uint32_t const abort_mask = (dir ? USB_EP_ABORT_EP0_IN_BITS : USB_EP_ABORT_EP0_OUT_BITS);
if (rp2040_chip_version() >= 2) {
usb_hw_set->abort = abort_mask;
while ((usb_hw->abort_done & abort_mask) != abort_mask) {}
}
// With this workaround a race window still exists, but smaller.
// ABORT flag is unusable prior to hardware B2 (RP2040-E2), so a larger
// race window exists for B1 and earlier.
if (rp2040_chip_version() >= 2) {
usb_hw_set->abort = 0x3;
while ((usb_hw->abort_done & 0x3) != 0x3)
;
}
// If we have finished this transfer on EP0 set pid back to 1 for next
// setup transfer. Also clear a stall in case
uint8_t addrs[] = {0x0, 0x80};
for (uint i = 0 ; i < TU_ARRAY_SIZE(addrs); i++)
{
struct hw_endpoint *ep = hw_endpoint_get_by_addr(addrs[i]);
ep->next_pid = 1u;
// Reset the buffer control now to minimize race conditions
_hw_endpoint_buffer_control_set_value32(ep, USB_BUF_CTRL_DATA1_PID | USB_BUF_CTRL_SEL);
// Explicit delay, because the one in
// _hw_endpoint_buffer_control_set_value32 is only to set AVAILABLE
__asm volatile (
"b 1f\n"
"1: b 1f\n"
"1: b 1f\n"
"1: b 1f\n"
"1: b 1f\n"
"1: b 1f\n"
"1:\n"
: : : "memory");
// Make sure local ep state matches peripheral
hw_endpoint_reset_transfer(ep);
}
if (rp2040_chip_version() >= 2) {
usb_hw_clear->abort = 0x3;
usb_hw_clear->abort_done = 0x3;
_hw_endpoint_buffer_control_set_value32(ep, USB_BUF_CTRL_DATA1_PID | USB_BUF_CTRL_SEL);
hw_endpoint_reset_transfer(ep);
if (rp2040_chip_version() >= 2) {
usb_hw_clear->abort_done = abort_mask;
usb_hw_clear->abort = abort_mask;
}
}
ep->next_pid = 1u;
}
}
static void __tusb_irq_path_func(reset_non_control_endpoints)(void) {
@@ -300,7 +284,7 @@ static void __tusb_irq_path_func(dcd_rp2040_irq)(void) {
uint8_t const* setup = remove_volatile_cast(uint8_t const*, &usb_dpram->setup_packet);
// reset pid to both 1 (data and ack)
reset_ep0_pid();
reset_ep0();
// Pass setup packet to tiny usb
dcd_event_setup_received(0, setup, true);
@@ -388,6 +372,8 @@ static void __tusb_irq_path_func(dcd_rp2040_irq)(void) {
void dcd_init(uint8_t rhport) {
assert(rhport == 0);
TU_LOG(2, "Chip Version B%u\r\n", rp2040_chip_version());
// Reset hardware to default state
rp2040_usb_init();