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move errata to end of c file

This commit is contained in:
hathach 2023-01-31 17:37:14 +07:00
parent 19b6cbc616
commit 6759721e9a
1 changed files with 65 additions and 39 deletions
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104
src/portable/raspberrypi/rp2040/rp2040_usb.c
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@ -32,6 +32,10 @@
#include <stdlib.h>
#include "rp2040_usb.h"
//--------------------------------------------------------------------+
// MACRO CONSTANT TYPEDEF PROTOTYPE
//--------------------------------------------------------------------+
// Direction strings for debug
const char *ep_dir_string[] = {
"out",
@ -40,6 +44,14 @@ const char *ep_dir_string[] = {
static void _hw_endpoint_xfer_sync(struct hw_endpoint *ep);
#if TUD_OPT_RP2040_USB_DEVICE_UFRAME_FIX
static bool e15_is_bulkin_ep(struct hw_endpoint *ep);
static bool e15_is_critical_frame_period(struct hw_endpoint *ep);
#else
#define e15_is_bulkin_ep(x) (false)
#define e15_is_critical_frame_period(x) (false)
#endif
// if usb hardware is in host mode
TU_ATTR_ALWAYS_INLINE static inline bool is_host_mode(void)
{
@ -47,47 +59,9 @@ TU_ATTR_ALWAYS_INLINE static inline bool is_host_mode(void)
}
//--------------------------------------------------------------------+
//
// Implementation
//--------------------------------------------------------------------+
#if TUD_OPT_RP2040_USB_DEVICE_UFRAME_FIX
// Errata 15 Walkaround for Device Bulk-In endpoint to avoid schedule an transfer
// within last 20% of an USB frame.
volatile uint32_t e15_last_sof = 0;
// check if Errata 15 walkround is needed for this endpoint
static bool __tusb_irq_path_func(e15_is_bulkin_ep) (struct hw_endpoint *ep)
{
return (!is_host_mode() && tu_edpt_dir(ep->ep_addr) == TUSB_DIR_IN &&
ep->transfer_type == TUSB_XFER_BULK);
}
// check if we need to apply Errata 15 workaround: ie.g
// Enpoint is BULK IN and is currently in critical frame period i.e 20% of last usb frame
static bool __tusb_irq_path_func(e15_is_critical_frame_period) (struct hw_endpoint *ep)
{
TU_VERIFY(e15_is_bulkin_ep(ep));
/* Avoid the last 200us (uframe 6.5-7) of a frame, up to the EOF2 point.
* The device state machine cannot recover from receiving an incorrect PID
* when it is expecting an ACK.
*/
uint32_t delta = time_us_32() - e15_last_sof;
if (delta < 800 || delta > 998) {
return false;
}
TU_LOG(3, "Avoiding sof %u now %lu last %lu\n", (usb_hw->sof_rd + 1) & USB_SOF_RD_BITS, time_us_32(), e15_last_sof);
return true;
}
#else
#define e15_is_bulkin_ep(x) false
#define e15_is_critical_frame_period(x) false
#endif
void rp2040_usb_init(void)
{
// Reset usb controller
@ -396,4 +370,56 @@ bool __tusb_irq_path_func(hw_endpoint_xfer_continue)(struct hw_endpoint *ep)
return false;
}
//--------------------------------------------------------------------+
// Errata 15
//--------------------------------------------------------------------+
#if TUD_OPT_RP2040_USB_DEVICE_UFRAME_FIX
/* Don't mark IN buffers as available during the last 200us of a full-speed
frame. This avoids a situation seen with the USB2.0 hub on a Raspberry
Pi 4 where a late IN token before the next full-speed SOF can cause port
babble and a corrupt ACK packet. The nature of the data corruption has a
chance to cause device lockup.
Use the next SOF to mark delayed buffers as available. This reduces
available Bulk IN bandwidth by approximately 20%, and requires that the
SOF interrupt is enabled while these transfers are ongoing.
Inherit the top-level enable from the corresponding Pico-SDK flag.
Applications that will not use the device in a situation where it could
be plugged into a Pi 4 or Pi 400 (for example, when directly connected
to a commodity hub or other host) can turn off the flag in the SDK.
*/
volatile uint32_t e15_last_sof = 0;
// check if Errata 15 is needed for this endpoint i.e device bulk-in
static bool __tusb_irq_path_func(e15_is_bulkin_ep) (struct hw_endpoint *ep)
{
return (!is_host_mode() && tu_edpt_dir(ep->ep_addr) == TUSB_DIR_IN &&
ep->transfer_type == TUSB_XFER_BULK);
}
// check if we need to apply Errata 15 walk-around : i.e
// Endpoint is BULK IN and is currently in critical frame period i.e 20% of last usb frame
static bool __tusb_irq_path_func(e15_is_critical_frame_period) (struct hw_endpoint *ep)
{
TU_VERIFY(e15_is_bulkin_ep(ep));
/* Avoid the last 200us (uframe 6.5-7) of a frame, up to the EOF2 point.
* The device state machine cannot recover from receiving an incorrect PID
* when it is expecting an ACK.
*/
uint32_t delta = time_us_32() - e15_last_sof;
if (delta < 800 || delta > 998) {
return false;
}
TU_LOG(3, "Avoiding sof %u now %lu last %lu\n", (usb_hw->sof_rd + 1) & USB_SOF_RD_BITS, time_us_32(), e15_last_sof);
return true;
}
#endif
#endif