diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.14/950-0135-fiq_fsm-rewind-DMA-pointer-for-OUT-transactions-that.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.14/950-0135-fiq_fsm-rewind-DMA-pointer-for-OUT-transactions-that.patch | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.14/950-0135-fiq_fsm-rewind-DMA-pointer-for-OUT-transactions-that.patch b/target/linux/brcm2708/patches-4.14/950-0135-fiq_fsm-rewind-DMA-pointer-for-OUT-transactions-that.patch new file mode 100644 index 0000000000..65a33f98a6 --- /dev/null +++ b/target/linux/brcm2708/patches-4.14/950-0135-fiq_fsm-rewind-DMA-pointer-for-OUT-transactions-that.patch @@ -0,0 +1,44 @@ +From 3d0898f22d62dd7a05c39de9ea7e200689dc6c20 Mon Sep 17 00:00:00 2001 +From: P33M <P33M@users.noreply.github.com> +Date: Fri, 24 Nov 2017 13:49:26 +0000 +Subject: [PATCH 135/454] fiq_fsm: rewind DMA pointer for OUT transactions that + fail (#2288) + +See: https://github.com/raspberrypi/linux/issues/2140 +--- + drivers/usb/host/dwc_otg/dwc_otg_fiq_fsm.c | 12 ++++++++++++ + 1 file changed, 12 insertions(+) + +--- a/drivers/usb/host/dwc_otg/dwc_otg_fiq_fsm.c ++++ b/drivers/usb/host/dwc_otg/dwc_otg_fiq_fsm.c +@@ -267,6 +267,15 @@ static void notrace fiq_fsm_reload_hctsi + } + + /** ++ * fiq_fsm_reload_hcdma() - for OUT transactions, rewind DMA pointer ++ */ ++static void notrace fiq_fsm_reload_hcdma(struct fiq_state *st, int n) ++{ ++ hcdma_data_t hcdma = st->channel[n].hcdma_copy; ++ FIQ_WRITE(st->dwc_regs_base + HC_START + (HC_OFFSET * n) + HC_DMA, hcdma.d32); ++} ++ ++/** + * fiq_iso_out_advance() - update DMA address and split position bits + * for isochronous OUT transactions. + * +@@ -827,11 +836,14 @@ static int notrace noinline fiq_fsm_do_h + fiq_fsm_setup_csplit(state, n); + } else if (hcint.b.nak) { + // No buffer space in TT. Retry on a uframe boundary. ++ fiq_fsm_reload_hcdma(state, n); + st->fsm = FIQ_NP_SSPLIT_RETRY; + handled = 1; + } else if (hcint.b.xacterr) { + // The only other one we care about is xacterr. This implies HS bus error - retry. + st->nr_errors++; ++ if(st->hcchar_copy.b.epdir == 0) ++ fiq_fsm_reload_hcdma(state, n); + st->fsm = FIQ_NP_SSPLIT_RETRY; + if (st->nr_errors >= 3) { + st->fsm = FIQ_NP_SPLIT_HS_ABORTED; |