Hi Nick, In DMA mode handling NAKs internally by hardware performing starting from core v2.71a. Before v2.71a handling NAKs should be performed by driver. Your core is 2.65a. Thanks, Minas On 3/11/2017 7:14 PM, Nick Hudson wrote: > Hi, > > I'm using a mostly unmodified older version of the dwc2 driver in NetBSD > taken from > > git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git > > > Import latest dwc2 sources > > commit 192cb07f7928e8cb09a9851e6c0f7478baa3bc6d > Author: John Youn <John.Youn@xxxxxxxxxxxx <mailto:John.Youn@xxxxxxxxxxxx>> > Date: Mon Jan 11 16:32:28 2016 -0800 > > > and it would appear that the hardware isn't handling the device NAKs in > DMA mode. I understand from the code that in DMA mode the NAKs should be > handled in hardware and not generate interrupts. Is this the case? > > > Any pointers? > > > Thanks, > Nick > > > dwctwo0: dwc2_hc_init() > dwctwo0: DMA enabled > dwctwo0: desc DMA disabled > dwctwo0: set HCINTMSK to 00000006 > dwctwo0: set HAINTMSK to 00000080 > dwctwo0: set GINTMSK to f3000806 > dwctwo0: set HCCHAR(7) to 00881200 > dwctwo0: dwc2_hc_init: Channel 7 > dwctwo0: Dev Addr: 2 > dwctwo0: Ep Num: 2 > dwctwo0: Is In: 0 > dwctwo0: Is Low Speed: 0 > dwctwo0: Ep Type: 2 > dwctwo0: Max Pkt: 512 > dwctwo0: Queue non-periodic transactions > dwctwo0: NP Tx Req Queue Space Avail (before queue): 8 > dwctwo0: NP Tx FIFO Space Avail (before queue): 912 > dwctwo0: dwc2_hc_start_transfer() > dwctwo0: ping, DMA > dwctwo0: no split > dwctwo0: Wrote 80401000 to HCTSIZ(7) > dwctwo0: dwc2_hc_start_transfer: Channel 7 > dwctwo0: Xfer Size: 4096 > dwctwo0: Num Pkts: 8 > dwctwo0: Start PID: 0 > dwctwo0: Multi Cnt: 1 > dwctwo0: Wrote 80981200 to HCCHAR(7) > dwctwo0: --Host Channel Interrupt--, Channel 7 > dwctwo0: hcint 0x00000012, hcintmsk 0x00000002, hcint&hcintmsk 0x00000002 > dwctwo0: --Host Channel 7 Interrupt: Channel Halted-- > dwctwo0: --Host Channel 7 Interrupt: DMA Channel Halted-- > dwctwo0: --Host Channel 7 Interrupt: NAK Received-- > dwctwo0: DWC_otg: dwc2_update_urb_state_abn: OUT, channel 7 > dwctwo0: chan->start_pkt_count 8 > dwctwo0: hctsiz.pktcnt 8 > dwctwo0: chan->max_packet 512 > dwctwo0: bytes_transferred 0 > dwctwo0: urb->actual_length 0 > dwctwo0: urb->transfer_buffer_length 4096 > dwctwo0: dwc2_halt_channel() > dwctwo0: DMA enabled > dwctwo0: dwc2_release_channel: channel 7, halt_status 4 > dwctwo0: dwc2_deactivate_qh(0xffffffff8d046808,0xffffffff8cf6bce0,0) > dwctwo0: dwc2_hcd_qh_deactivate() > dwctwo0: dwc2_hcd_qh_unlink() > dwctwo0: dwc2_hcd_qh_add() > dwctwo0: dwc2_assign_and_init_hc(0xffffffff8d046808,0xffffffff8cf6bce0) > dwctwo0: dwc2_hc_init() > dwctwo0: DMA enabled > dwctwo0: desc DMA disabled > dwctwo0: set HCINTMSK to 00000006 > dwctwo0: set HAINTMSK to 00000001 > dwctwo0: set GINTMSK to f3000806 > dwctwo0: set HCCHAR(0) to 00881200 > dwctwo0: dwc2_hc_init: Channel 0 > dwctwo0: Dev Addr: 2 > dwctwo0: Ep Num: 2 > dwctwo0: Is In: 0 > dwctwo0: Is Low Speed: 0 > dwctwo0: Ep Type: 2 > dwctwo0: Max Pkt: 512 > dwctwo0: Queue non-periodic transactions > dwctwo0: NP Tx Req Queue Space Avail (before queue): 8 > dwctwo0: NP Tx FIFO Space Avail (before queue): 912 > dwctwo0: dwc2_hc_start_transfer() > dwctwo0: ping, DMA > dwctwo0: no split > dwctwo0: Wrote 80401000 to HCTSIZ(0) > dwctwo0: dwc2_hc_start_transfer: Channel 0 > dwctwo0: Xfer Size: 4096 > dwctwo0: Num Pkts: 8 > dwctwo0: Start PID: 0 > dwctwo0: Multi Cnt: 1 > dwctwo0: Wrote 80981200 to HCCHAR(0) > dwctwo0: --Host Channel Interrupt--, Channel 0 > dwctwo0: hcint 0x00000012, hcintmsk 0x00000002, hcint&hcintmsk 0x00000002 > dwctwo0: --Host Channel 0 Interrupt: Channel Halted-- > dwctwo0: --Host Channel 0 Interrupt: DMA Channel Halted-- > dwctwo0: --Host Channel 0 Interrupt: NAK Received-- > dwctwo0: DWC_otg: dwc2_update_urb_state_abn: OUT, channel 0 > dwctwo0: chan->start_pkt_count 8 > dwctwo0: hctsiz.pktcnt 8 > dwctwo0: chan->max_packet 512 > dwctwo0: bytes_transferred 0 > dwctwo0: urb->actual_length 0 > dwctwo0: urb->transfer_buffer_length 4096 > dwctwo0: dwc2_halt_channel() > dwctwo0: DMA enabled > dwctwo0: dwc2_release_channel: channel 0, halt_status 4 > dwctwo0: dwc2_deactivate_qh(0xffffffff8d046808,0xffffffff8cf6bce0,0) > dwctwo0: dwc2_hcd_qh_deactivate() > dwctwo0: dwc2_hcd_qh_unlink() > dwctwo0: dwc2_hcd_qh_add() > dwctwo0: dwc2_assign_and_init_hc(0xffffffff8d046808,0xffffffff8cf6bce0) > dwctwo0: dwc2_hc_init() > > > > > -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
