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fix(usb/host): Fix reaction on High-Speed NYET packet

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In Scatter-Gather DMA mode, the USB-DWC will automatically enable
PING protocol if an OUT packet is NACKed by the High-Speed device.
The PING bit must be manually reset.
This commit is contained in:
Tomas Rezucha
2024-12-17 14:31:25 +01:00
parent b70331a9b7
commit 8e35c7854d
4 changed files with 71 additions and 92 deletions
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57
components/hal/esp32s3/include/hal/usb_dwc_ll.h
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@@ -791,50 +791,33 @@ static inline void usb_dwc_ll_hctsiz_set_qtd_list_len(volatile usb_dwc_host_chan
chan->hctsiz_reg.val = hctsiz.val;
}
static inline void usb_dwc_ll_hctsiz_init(volatile usb_dwc_host_chan_regs_t *chan)
/**
* @brief Perform PING protocol
*
* @note This function is here only for compatibility reasons. PING is not relevant on FS only targets
* @param[in] chan Channel registers
* @param[in] enable true: Enable PING, false: Disable PING
*/
static inline void usb_dwc_ll_hctsiz_set_dopng(volatile usb_dwc_host_chan_regs_t *chan, bool enable)
{
usb_dwc_hctsiz_reg_t hctsiz;
hctsiz.val = chan->hctsiz_reg.val;
hctsiz.dopng = 0; //Don't do ping
/*
Set SCHED_INFO which occupies xfersize[7:0]
It is always set to 0xFF for full speed and not used in Bulk/Ctrl channels
*/
hctsiz.xfersize |= 0xFF;
chan->hctsiz_reg.val = hctsiz.val;
}
/**
* @brief Set scheduling info for Periodic channel
*
* @note ESP32-S3 is Full-Speed only, so SCHED_INFO is always set to 0xFF
* @attention This function must be called for each periodic channel!
* @see USB-OTG databook: Table 5-47
*
* @param[in] chan Channel registers
* @param[in] tokens_per_frame Ignored
* @param[in] offset Ignored
*/
static inline void usb_dwc_ll_hctsiz_set_sched_info(volatile usb_dwc_host_chan_regs_t *chan, int tokens_per_frame, int offset)
{
// @see USB-OTG databook: Table 5-47
// This function is relevant only for HS
usb_dwc_hctsiz_reg_t hctsiz;
hctsiz.val = chan->hctsiz_reg.val;
uint8_t sched_info_val;
switch (tokens_per_frame) {
case 1:
offset %= 8; // If the required offset > 8, we must wrap around to SCHED_INFO size = 8
sched_info_val = 0b00000001;
break;
case 2:
offset %= 4;
sched_info_val = 0b00010001;
break;
case 4:
offset %= 2;
sched_info_val = 0b01010101;
break;
case 8:
offset = 0;
sched_info_val = 0b11111111;
break;
default:
abort();
break;
}
sched_info_val <<= offset;
hctsiz.xfersize &= ~(0xFF);
hctsiz.xfersize |= sched_info_val;
hctsiz.xfersize |= 0xFF;
chan->hctsiz_reg.val = hctsiz.val;
}