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Merge pull request #2024 from jfedor2/sie_ctrl_fix

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[rp2040] Make writes to SIE_CTRL aware of concurrent access
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Ha Thach 2023-04-21 12:17:57 +07:00 committed by GitHub
commit 0871238cac
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1 changed files with 10 additions and 0 deletions
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10
src/portable/raspberrypi/rp2040/hcd_rp2040.c
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@ -562,6 +562,11 @@ bool hcd_edpt_xfer(uint8_t rhport, uint8_t dev_addr, uint8_t ep_addr, uint8_t *
uint32_t flags = USB_SIE_CTRL_START_TRANS_BITS | SIE_CTRL_BASE |
(ep_dir ? USB_SIE_CTRL_RECEIVE_DATA_BITS : USB_SIE_CTRL_SEND_DATA_BITS) |
(need_pre(dev_addr) ? USB_SIE_CTRL_PREAMBLE_EN_BITS : 0);
// START_TRANS bit on SIE_CTRL seems to exhibit the same behavior as the AVAILABLE bit
// described in RP2040 Datasheet, release 2.1, section "4.1.2.5.1. Concurrent access".
// We write everything except the START_TRANS bit first, then wait some cycles.
usb_hw->sie_ctrl = flags & ~USB_SIE_CTRL_START_TRANS_BITS;
busy_wait_at_least_cycles(12);
usb_hw->sie_ctrl = flags;
}else
{
@ -602,6 +607,11 @@ bool hcd_setup_send(uint8_t rhport, uint8_t dev_addr, uint8_t const setup_packet
uint32_t const flags = SIE_CTRL_BASE | USB_SIE_CTRL_SEND_SETUP_BITS | USB_SIE_CTRL_START_TRANS_BITS |
(need_pre(dev_addr) ? USB_SIE_CTRL_PREAMBLE_EN_BITS : 0);
// START_TRANS bit on SIE_CTRL seems to exhibit the same behavior as the AVAILABLE bit
// described in RP2040 Datasheet, release 2.1, section "4.1.2.5.1. Concurrent access".
// We write everything except the START_TRANS bit first, then wait some cycles.
usb_hw->sie_ctrl = flags & ~USB_SIE_CTRL_START_TRANS_BITS;
busy_wait_at_least_cycles(12);
usb_hw->sie_ctrl = flags;
return true;