Adds helper functions to enable snooping and outstanding burst beat
settings.
Signed-off-by: Rajat Srivastava <rajat.srivast...@nxp.com>
Signed-off-by: Rajesh Bhagat <rajesh.bha...@nxp.com>
---
Changes in v3:
- Changed operator for code cleanup
Changes in v2:
- Removes SoC specific flags and added helper functions
drivers/usb/dwc3/core.c | 45 +++++++++++++++++++++++++++++++++++++++++++++
drivers/usb/dwc3/core.h | 7 +++++++
2 files changed, 52 insertions(+)
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index 85cc96a..4ac599a 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -599,6 +599,51 @@ static void dwc3_core_exit_mode(struct dwc3 *dwc)
#define DWC3_ALIGN_MASK (16 - 1)
+void dwc3_core_incr_burst_enable(int index, int btype_incr_val,
+ int breq_limit)
+{
+ struct dwc3 *dwc;
+ u32 reg;
+
+ list_for_each_entry(dwc, &dwc3_list, list) {
+ if (dwc->index != index)
+ continue;
+
+ /*
+ * Change burst beat and outstanding pipelined
+ * transfers requests
+ */
+ reg = dwc3_readl(dwc->regs, DWC3_GSBUSCFG0);
+ reg = (reg & ~DWC3_INCR_BTYPE_MASK) | btype_incr_val;
+ dwc3_writel(dwc->regs, DWC3_GSBUSCFG0, reg);
+
+ reg = dwc3_readl(dwc->regs, DWC3_GSBUSCFG1);
+ reg = (reg & ~DWC3_BREQ_LIMIT_MASK) | (breq_limit << 8);
+ dwc3_writel(dwc->regs, DWC3_GSBUSCFG1, reg);
+ break;
+ }
+}
+
+void dwc3_core_set_snooping(int index, bool snoop)
+{
+ struct dwc3 *dwc;
+ u32 reg;
+
+ list_for_each_entry(dwc, &dwc3_list, list) {
+ if (dwc->index != index)
+ continue;
+
+ /* Enable/Disable snooping */
+ reg = dwc3_readl(dwc->regs, DWC3_GSBUSCFG0);
+ if (snoop)
+ reg |= DWC3_SNOOP_ENABLE;
+ else
+ reg &= ~DWC3_SNOOP_ENABLE;
+ dwc3_writel(dwc->regs, DWC3_GSBUSCFG0, reg);
+ break;
+ }
+}
+
/**
* dwc3_uboot_init - dwc3 core uboot initialization code
* @dwc3_dev: struct dwc3_device containing initialization data
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index 72d2fcd..455e7fa 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -593,6 +593,13 @@ struct dwc3_hwparams {
/* HWPARAMS7 */
#define DWC3_RAM1_DEPTH(n) ((n) & 0xffff)
+/* GSBUSCFG0 */
+#define DWC3_SNOOP_ENABLE (0x22220000)
+#define DWC3_INCR_BTYPE_MASK (0xff)
+
+/* GSBUSCFG1 */
+#define DWC3_BREQ_LIMIT_MASK (0xf00)
+
struct dwc3_request {
struct usb_request request;
struct list_head list;
--
2.6.2.198.g614a2ac
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