drivers: dwc3: host: Change burst beat and outstanding pipelined transfers requests.

This is required for better performance, and performs below tuning:
1. Enable burst length set, and define it as 4/8/16.
2. Set burst request limit to 16 requests.

Signed-off-by: Nikhil Badola <nikhil.badola@freescale.com>
Signed-off-by: Rajesh Bhagat <rajesh.bhagat@freescale.com>
Signed-off-by: yinbo.zhu <yinbo.zhu@nxp.com>

2 files changed, 42 insertions, 0 deletions

diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index fea4469..0672672 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -83,6 +83,13 @@ static int dwc3_get_dr_mode(struct dwc3 *dwc)
 		mode = USB_DR_MODE_HOST;
 		break;
 	default:
+
+	/* Change burst beat and outstanding pipelined transfers requests */
+	dwc3_writel(dwc->regs, DWC3_GSBUSCFG0,
+		(dwc3_readl(dwc->regs, DWC3_GSBUSCFG0) & ~0xff) | 0xf);
+	dwc3_writel(dwc->regs, DWC3_GSBUSCFG1,
+		dwc3_readl(dwc->regs, DWC3_GSBUSCFG1) | 0xf00);
+
 		if (IS_ENABLED(CONFIG_USB_DWC3_HOST))
 			mode = USB_DR_MODE_HOST;
 		else if (IS_ENABLED(CONFIG_USB_DWC3_GADGET))
@@ -724,6 +731,8 @@ static int dwc3_core_init(struct dwc3 *dwc)
 	/* Adjust Frame Length */
 	dwc3_frame_length_adjustment(dwc);
 
+	dwc3_set_soc_bus_cfg(dwc);
+
 	usb_phy_set_suspend(dwc->usb2_phy, 0);
 	usb_phy_set_suspend(dwc->usb3_phy, 0);
 	ret = phy_power_on(dwc->usb2_generic_phy);
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index 884c437..910f068 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -154,6 +154,32 @@
 
 /* Bit fields */
 
+/* Global SoC Bus Configuration Register 0 */
+#define AXI3_CACHE_TYPE_AW		0x8 /* write allocate */
+#define AXI3_CACHE_TYPE_AR		0x4 /* read allocate */
+#define AXI3_CACHE_TYPE_SNP		0x2 /* cacheable */
+#define AXI3_CACHE_TYPE_BUF		0x1 /* bufferable */
+#define DWC3_GSBUSCFG0_DATARD_SHIFT	28
+#define DWC3_GSBUSCFG0_DESCRD_SHIFT	24
+#define DWC3_GSBUSCFG0_DATAWR_SHIFT	20
+#define DWC3_GSBUSCFG0_DESCWR_SHIFT	16
+#define DWC3_GSBUSCFG0_SNP_MASK		0xffff0000
+#define DWC3_GSBUSCFG0_DATABIGEND	(1 << 11)
+#define DWC3_GSBUSCFG0_DESCBIGEND	(1 << 10)
+#define DWC3_GSBUSCFG0_INCR256BRSTENA	(1 << 7) /* INCR256 burst */
+#define DWC3_GSBUSCFG0_INCR128BRSTENA	(1 << 6) /* INCR128 burst */
+#define DWC3_GSBUSCFG0_INCR64BRSTENA	(1 << 5) /* INCR64 burst */
+#define DWC3_GSBUSCFG0_INCR32BRSTENA	(1 << 4) /* INCR32 burst */
+#define DWC3_GSBUSCFG0_INCR16BRSTENA	(1 << 3) /* INCR16 burst */
+#define DWC3_GSBUSCFG0_INCR8BRSTENA	(1 << 2) /* INCR8 burst */
+#define DWC3_GSBUSCFG0_INCR4BRSTENA	(1 << 1) /* INCR4 burst */
+#define DWC3_GSBUSCFG0_INCRBRSTENA	(1 << 0) /* undefined length enable */
+#define DWC3_GSBUSCFG0_INCRBRST_MASK	0xff
+
+/* Global SoC Bus Configuration Register 1 */
+#define DWC3_GSBUSCFG1_1KPAGEENA	(1 << 12) /* 1K page boundary enable */
+#define DWC3_GSBUSCFG1_PTRANSLIMIT_MASK	0xf00
+
 /* Global Debug Queue/FIFO Space Available Register */
 #define DWC3_GDBGFIFOSPACE_NUM(n)	((n) & 0x1f)
 #define DWC3_GDBGFIFOSPACE_TYPE(n)	(((n) << 5) & 0x1e0)
@@ -753,6 +779,7 @@ struct dwc3_scratchpad_array {
  * @regs: base address for our registers
  * @regs_size: address space size
  * @fladj: frame length adjustment
+ * @incrx_type: INCR burst type adjustment
  * @irq_gadget: peripheral controller's IRQ number
  * @nr_scratch: number of scratch buffers
  * @u1u2: only used on revisions <1.83a for workaround
@@ -872,6 +899,12 @@ struct dwc3 {
 	enum usb_phy_interface	hsphy_mode;
 
 	u32			fladj;
+	/*
+	 * For INCR burst type.
+	 * First field: for undefined length INCR burst type enable.
+	 * Second field: for INCRx burst type enable
+	 */
+	u32			incrx_type[2];
 	u32			irq_gadget;
 	u32			nr_scratch;
 	u32			u1u2;