91 lines
3.5 KiB
Diff
Executable file
91 lines
3.5 KiB
Diff
Executable file
From 099581aeb11b7eafbca02c9e69f6e6c8de0c57ec Mon Sep 17 00:00:00 2001
|
|
From: P33M <P33M@github.com>
|
|
Date: Fri, 20 Jun 2014 17:23:20 +0100
|
|
Subject: [PATCH 046/114] fiq_fsm: Implement hack for Split Interrupt
|
|
transactions
|
|
|
|
Hubs aren't too picky about which endpoint we send Control type split
|
|
transactions to. By treating Interrupt transfers as Control, it is
|
|
possible to use the non-periodic queue in the OTG core as well as the
|
|
non-periodic FIFOs in the hub itself. This massively reduces the
|
|
microframe exclusivity/contention that periodic split transactions
|
|
otherwise have to enforce.
|
|
|
|
It goes without saying that this is a fairly egregious USB specification
|
|
violation, but it works.
|
|
|
|
Original idea by Hans Petter Selasky @ FreeBSD.org.
|
|
---
|
|
drivers/usb/host/dwc_otg/dwc_otg_hcd.c | 32 ++++++++++++++++++++++++++------
|
|
1 file changed, 26 insertions(+), 6 deletions(-)
|
|
|
|
diff --git a/drivers/usb/host/dwc_otg/dwc_otg_hcd.c b/drivers/usb/host/dwc_otg/dwc_otg_hcd.c
|
|
index 130096b..68d4f3b 100644
|
|
--- a/drivers/usb/host/dwc_otg/dwc_otg_hcd.c
|
|
+++ b/drivers/usb/host/dwc_otg/dwc_otg_hcd.c
|
|
@@ -1055,10 +1055,11 @@ int dwc_otg_hcd_init(dwc_otg_hcd_t * hcd, dwc_otg_core_if_t * core_if)
|
|
for (i=0; i < hcd->core_if->core_params->host_channels; i++) {
|
|
dwc_otg_cleanup_fiq_channel(hcd, i);
|
|
}
|
|
- DWC_PRINTF("FIQ FSM acceleration enabled for :\n%s%s%s",
|
|
+ DWC_PRINTF("FIQ FSM acceleration enabled for :\n%s%s%s%s",
|
|
(fiq_fsm_mask & 0x1) ? "Non-periodic Split Transactions\n" : "",
|
|
(fiq_fsm_mask & 0x2) ? "Periodic Split Transactions\n" : "",
|
|
- (fiq_fsm_mask & 0x4) ? "High-Speed Isochronous Endpoints\n" : "");
|
|
+ (fiq_fsm_mask & 0x4) ? "High-Speed Isochronous Endpoints\n" : "",
|
|
+ (fiq_fsm_mask & 0x8) ? "Interrupt/Control Split Transaction hack enabled\n" : "");
|
|
}
|
|
}
|
|
|
|
@@ -1789,6 +1790,20 @@ int fiq_fsm_queue_split_transaction(dwc_otg_hcd_t *hcd, dwc_otg_qh_t *qh)
|
|
st->hcintmsk_copy.b.chhltd = 1;
|
|
st->hcintmsk_copy.b.ahberr = 1;
|
|
|
|
+ /* Hack courtesy of FreeBSD: apparently forcing Interrupt Split transactions
|
|
+ * as Control puts the transfer into the non-periodic request queue and the
|
|
+ * non-periodic handler in the hub. Makes things lots easier.
|
|
+ */
|
|
+ if ((fiq_fsm_mask & 0x8) && hc->ep_type == UE_INTERRUPT) {
|
|
+ st->hcchar_copy.b.multicnt = 0;
|
|
+ st->hcchar_copy.b.oddfrm = 0;
|
|
+ st->hcchar_copy.b.eptype = UE_CONTROL;
|
|
+ if (hc->align_buff) {
|
|
+ st->hcdma_copy.d32 = hc->align_buff;
|
|
+ } else {
|
|
+ st->hcdma_copy.d32 = ((unsigned long) hc->xfer_buff & 0xFFFFFFFF);
|
|
+ }
|
|
+ }
|
|
DWC_WRITE_REG32(&hc_regs->hcdma, st->hcdma_copy.d32);
|
|
DWC_WRITE_REG32(&hc_regs->hctsiz, st->hctsiz_copy.d32);
|
|
DWC_WRITE_REG32(&hc_regs->hcsplt, st->hcsplt_copy.d32);
|
|
@@ -1842,6 +1857,9 @@ int fiq_fsm_queue_split_transaction(dwc_otg_hcd_t *hcd, dwc_otg_qh_t *qh)
|
|
}
|
|
}
|
|
}
|
|
+ if ((fiq_fsm_mask & 0x8) && hc->ep_type == UE_INTERRUPT)
|
|
+ start_immediate = 1;
|
|
+
|
|
fiq_print(FIQDBG_INT, hcd->fiq_state, "FSMQ %01d %01d", hc->hc_num, start_immediate);
|
|
fiq_print(FIQDBG_INT, hcd->fiq_state, "%08d", hfnum.b.frrem);
|
|
//fiq_print(FIQDBG_INT, hcd->fiq_state, "H:%02dP:%02d", hub_addr, port_addr);
|
|
@@ -1873,11 +1891,13 @@ int fiq_fsm_queue_split_transaction(dwc_otg_hcd_t *hcd, dwc_otg_qh_t *qh)
|
|
}
|
|
break;
|
|
case UE_INTERRUPT:
|
|
- if (start_immediate) {
|
|
+ if (fiq_fsm_mask & 0x8) {
|
|
+ st->fsm = FIQ_NP_SSPLIT_STARTED;
|
|
+ } else if (start_immediate) {
|
|
st->fsm = FIQ_PER_SSPLIT_STARTED;
|
|
- } else {
|
|
- st->fsm = FIQ_PER_SSPLIT_QUEUED;
|
|
- }
|
|
+ } else {
|
|
+ st->fsm = FIQ_PER_SSPLIT_QUEUED;
|
|
+ }
|
|
default:
|
|
break;
|
|
}
|
|
--
|
|
1.8.3.2
|
|
|