Created
September 21, 2012 15:58
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usb_split_delay.patch
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diff --git a/drivers/usb/host/dwc_otg/dwc_otg_cil.c b/drivers/usb/host/dwc_otg/dwc_otg_cil.c | |
index 9b67537..f064a69 100644 | |
--- a/drivers/usb/host/dwc_otg/dwc_otg_cil.c | |
+++ b/drivers/usb/host/dwc_otg/dwc_otg_cil.c | |
@@ -61,6 +61,9 @@ | |
#include "dwc_otg_regs.h" | |
#include "dwc_otg_cil.h" | |
+extern int split_delay_static; | |
+extern int split_delay_dynamic; | |
+ | |
static int dwc_otg_setup_params(dwc_otg_core_if_t * core_if); | |
/** | |
@@ -2881,6 +2884,32 @@ void dwc_otg_hc_start_transfer(dwc_otg_core_if_t * core_if, dwc_hc_t * hc) | |
/* Load OUT packet into the appropriate Tx FIFO. */ | |
dwc_otg_hc_write_packet(core_if, hc); | |
} | |
+ if (hc->do_split) | |
+ { | |
+ if(split_delay_static>0) | |
+ DWC_UDELAY(split_delay_static); | |
+ | |
+ if(split_delay_dynamic>0) | |
+ { | |
+ hcint_data_t hcint; | |
+ int i = 0; | |
+ int mask; | |
+ | |
+ if (hc->complete_split) | |
+ mask = 0x63; | |
+ else | |
+ mask = 0x73; | |
+ | |
+ hcint.d32 = DWC_READ_REG32(&hc_regs->hcint); | |
+ | |
+ while (i < split_delay_dynamic && !(hcint.d32 & mask)) | |
+ { | |
+ i++; | |
+ DWC_UDELAY(1); | |
+ hcint.d32 = DWC_READ_REG32(&hc_regs->hcint); | |
+ } | |
+ } | |
+ } | |
#ifdef DEBUG | |
if (hc->ep_type != DWC_OTG_EP_TYPE_INTR) { | |
DWC_DEBUGPL(DBG_HCDV, "transfer %d from core_if %p\n", | |
diff --git a/drivers/usb/host/dwc_otg/dwc_otg_driver.c b/drivers/usb/host/dwc_otg/dwc_otg_driver.c | |
index d5d8c4b..5e71c97 100644 | |
--- a/drivers/usb/host/dwc_otg/dwc_otg_driver.c | |
+++ b/drivers/usb/host/dwc_otg/dwc_otg_driver.c | |
@@ -61,6 +61,8 @@ | |
#define DWC_DRIVER_DESC "HS OTG USB Controller driver" | |
bool microframe_schedule=true; | |
+int split_delay_static = 0; | |
+int split_delay_dynamic = 0; | |
static const char dwc_driver_name[] = "dwc_otg"; | |
@@ -1369,6 +1371,11 @@ module_param_named(otg_ver, dwc_otg_module_params.otg_ver, int, 0444); | |
MODULE_PARM_DESC(otg_ver, "OTG revision supported 0=OTG 1.3 1=OTG 2.0"); | |
module_param(microframe_schedule, bool, 0444); | |
MODULE_PARM_DESC(microframe_schedule, "Enable the microframe scheduler"); | |
+module_param(split_delay_static, int, 0644); | |
+MODULE_PARM_DESC(split_delay_static, "Enable static delay on split (0 - disabled, N - usec)"); | |
+module_param(split_delay_dynamic, int, 0644); | |
+MODULE_PARM_DESC(split_delay_dynamic, "Enable dynamic delay on split (0 - disabled, N - usec)"); | |
+ | |
module_param(fiq_fix_enable, bool, 0444); | |
MODULE_PARM_DESC(fiq_fix_enable, "Enable the fiq fix"); |
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