layerscape: add patches-5.4

Add patches for linux-5.4. The patches are from NXP LSDK-20.04 release
which was tagged LSDK-20.04-V5.4.
https://source.codeaurora.org/external/qoriq/qoriq-components/linux/

For boards LS1021A-IOT, and Traverse-LS1043 which are not involved in
LSDK, port the dts patches from 4.14.

The patches are sorted into the following categories:
  301-arch-xxxx
  302-dts-xxxx
  303-core-xxxx
  701-net-xxxx
  801-audio-xxxx
  802-can-xxxx
  803-clock-xxxx
  804-crypto-xxxx
  805-display-xxxx
  806-dma-xxxx
  807-gpio-xxxx
  808-i2c-xxxx
  809-jailhouse-xxxx
  810-keys-xxxx
  811-kvm-xxxx
  812-pcie-xxxx
  813-pm-xxxx
  814-qe-xxxx
  815-sata-xxxx
  816-sdhc-xxxx
  817-spi-xxxx
  818-thermal-xxxx
  819-uart-xxxx
  820-usb-xxxx
  821-vfio-xxxx

Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>

1 files changed, 129 insertions, 0 deletions

diff --git a/target/linux/layerscape/patches-5.4/820-usb-0009-usb-dwc3-Add-workaround-for-host-mode-VBUS-glitch-wh.patch b/target/linux/layerscape/patches-5.4/820-usb-0009-usb-dwc3-Add-workaround-for-host-mode-VBUS-glitch-wh.patch
new file mode 100644
index 0000000000..18fe69d53f
--- /dev/null
+++ b/target/linux/layerscape/patches-5.4/820-usb-0009-usb-dwc3-Add-workaround-for-host-mode-VBUS-glitch-wh.patch
@@ -0,0 +1,129 @@
+From 61d471c8da972c7ebbaf63779bf8100ee1ec54eb Mon Sep 17 00:00:00 2001
+From: Ran Wang <ran.wang_1@nxp.com>
+Date: Wed, 16 Jan 2019 13:23:17 +0800
+Subject: [PATCH] usb: dwc3: Add workaround for host mode VBUS glitch when boot
+
+When DWC3 is set to host mode by programming register DWC3_GCTL, VBUS
+(or its control signal) will be turned on immediately on related Root Hub
+ports. Then, the VBUS is turned off for a little while(15us) when do xhci
+reset (conducted by xhci driver) and back to normal finally, we can
+observe a negative glitch of related signal happen.
+
+This VBUS glitch might cause some USB devices enumeration fail if kernel
+boot with them connected. Such as LS1012AFWRY/LS1043ARDB/LX2160AQDS
+/LS1088ARDB with Kingston 16GB USB2.0/Kingston USB3.0/JetFlash Transcend
+4GB USB2.0 drives. The fail cases include enumerated as full-speed device
+or report wrong device descriptor, etc.
+
+One SW workaround which can fix this is by programing all xhci PORTSC[PP]
+to 0 to turn off VBUS immediately after setting host mode in DWC3 driver
+(per signal measurement result, it will be too late to do it in
+xhci-plat.c or xhci.c). Then, after xhci reset complete in xhci driver,
+PORTSC[PP]s' value will back to 1 automatically and VBUS on at that time,
+no glitch happen and normal enumeration process has no impact.
+
+Signed-off-by: Ran Wang <ran.wang_1@nxp.com>
+Reviewed-by: Peter Chen <peter.chen@nxp.com>
+---
+ drivers/usb/dwc3/core.c |  3 +++
+ drivers/usb/dwc3/core.h |  3 +++
+ drivers/usb/dwc3/host.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
+ 3 files changed, 54 insertions(+)
+
+--- a/drivers/usb/dwc3/core.c
++++ b/drivers/usb/dwc3/core.c
+@@ -1350,6 +1350,9 @@ static void dwc3_get_properties(struct d
+ 	dwc->dis_metastability_quirk = device_property_read_bool(dev,
+ 				"snps,dis_metastability_quirk");
+ 
++	dwc->host_vbus_glitches = device_property_read_bool(dev,
++				"snps,host-vbus-glitches");
++
+ 	dwc->lpm_nyet_threshold = lpm_nyet_threshold;
+ 	dwc->tx_de_emphasis = tx_de_emphasis;
+ 
+--- a/drivers/usb/dwc3/core.h
++++ b/drivers/usb/dwc3/core.h
+@@ -1034,6 +1034,8 @@ struct dwc3_scratchpad_array {
+  * 	2	- No de-emphasis
+  * 	3	- Reserved
+  * @dis_metastability_quirk: set to disable metastability quirk.
++ * @host_vbus_glitches: set to avoid vbus glitch during
++ *                      xhci reset.
+  * @imod_interval: set the interrupt moderation interval in 250ns
+  *                 increments or 0 to disable.
+  */
+@@ -1225,6 +1227,7 @@ struct dwc3 {
+ 	unsigned		tx_de_emphasis:2;
+ 
+ 	unsigned		dis_metastability_quirk:1;
++	unsigned		host_vbus_glitches:1;
+ 
+ 	u16			imod_interval;
+ };
+--- a/drivers/usb/dwc3/host.c
++++ b/drivers/usb/dwc3/host.c
+@@ -9,8 +9,49 @@
+ 
+ #include <linux/platform_device.h>
+ 
++#include "../host/xhci.h"
++
+ #include "core.h"
+ 
++
++#define XHCI_HCSPARAMS1		0x4
++#define XHCI_PORTSC_BASE	0x400
++
++/*
++ * dwc3_power_off_all_roothub_ports - Power off all Root hub ports
++ * @dwc3: Pointer to our controller context structure
++ */
++static void dwc3_power_off_all_roothub_ports(struct dwc3 *dwc)
++{
++	int i, port_num;
++	u32 reg, op_regs_base, offset;
++	void __iomem *xhci_regs;
++
++	/* xhci regs is not mapped yet, do it temperary here */
++	if (dwc->xhci_resources[0].start) {
++		xhci_regs = ioremap(dwc->xhci_resources[0].start,
++				DWC3_XHCI_REGS_END);
++		if (IS_ERR(xhci_regs)) {
++			dev_err(dwc->dev, "Failed to ioremap xhci_regs\n");
++			return;
++		}
++
++		op_regs_base = HC_LENGTH(readl(xhci_regs));
++		reg = readl(xhci_regs + XHCI_HCSPARAMS1);
++		port_num = HCS_MAX_PORTS(reg);
++
++		for (i = 1; i <= port_num; i++) {
++			offset = op_regs_base + XHCI_PORTSC_BASE + 0x10*(i-1);
++			reg = readl(xhci_regs + offset);
++			reg &= ~PORT_POWER;
++			writel(reg, xhci_regs + offset);
++		}
++
++		iounmap(xhci_regs);
++	} else
++		dev_err(dwc->dev, "xhci base reg invalid\n");
++}
++
+ static int dwc3_host_get_irq(struct dwc3 *dwc)
+ {
+ 	struct platform_device	*dwc3_pdev = to_platform_device(dwc->dev);
+@@ -50,6 +91,13 @@ int dwc3_host_init(struct dwc3 *dwc)
+ 	struct platform_device	*dwc3_pdev = to_platform_device(dwc->dev);
+ 	int			prop_idx = 0;
+ 
++	/*
++	 * We have to power off all Root hub ports immediately after DWC3 set
++	 * to host mode to avoid VBUS glitch happen when xhci get reset later.
++	 */
++	if (dwc->host_vbus_glitches)
++		dwc3_power_off_all_roothub_ports(dwc);
++
+ 	irq = dwc3_host_get_irq(dwc);
+ 	if (irq < 0)
+ 		return irq;