This patch add a quirk to be compatible for AMD NL SoC
Some specific behaviors on NL:
- configure USB3 PIPE registers
- enable GCTL disscramble
- enable U2EXIT_LFPS
- enable hibernation at the global level
- set LPM errata dissabled
Signed-off-by: Huang Rui <ray.hu...@amd.com>
---
drivers/usb/dwc3/core.c | 33 ++++++++++++++++++++++++++++++++-
drivers/usb/dwc3/core.h | 5 +++++
drivers/usb/dwc3/dwc3-pci.c | 14 ++++++++++++++
drivers/usb/dwc3/gadget.c | 8 ++++++++
drivers/usb/dwc3/platform_data.h | 1 +
5 files changed, 60 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index b0f4d52..6138c5d 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -115,6 +115,25 @@ static int dwc3_core_soft_reset(struct dwc3 *dwc)
}
/**
+ * dwc3_core_nl_set_pipe3 - Configure USB3 PHY Interface for NL
+ * @dwc: Pointer to our controller context structure
+ */
+static void dwc3_core_nl_set_pipe3(struct dwc3 *dwc)
+{
+ u32 reg = 0;
+
+ reg |= DWC3_GUSB3PIPECTL_U2SSINP3OK | DWC3_GUSB3PIPECTL_UX_EXITINPX
+ | DWC3_GUSB3PIPECTL_UX_EXITINPX | DWC3_GUSB3PIPECTL_U1U2EXITFAIL
+ | DWC3_GUSB3PIPECTL_DEPOCHANGE | DWC3_GUSB3PIPECTL_RX_DETOPOLL;
+
+ reg |= DWC3_GUSB3PIPECTL_DEP1P2P3(1) | DWC3_GUSB3PIPECTL_TX_DEEPH(1);
+
+ dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);
+
+ mdelay(100);
+}
+
+/**
* dwc3_free_one_event_buffer - Frees one event buffer
* @dwc: Pointer to our controller context structure
* @evt: Pointer to event buffer to be freed
@@ -412,9 +431,19 @@ static int dwc3_core_init(struct dwc3 *dwc)
if (ret)
goto err0;
+ if (dwc->quirks & DWC3_AMD_NL_PLAT)
+ dwc3_core_nl_set_pipe3(dwc);
+
reg = dwc3_readl(dwc->regs, DWC3_GCTL);
+
reg &= ~DWC3_GCTL_SCALEDOWN_MASK;
- reg &= ~DWC3_GCTL_DISSCRAMBLE;
+
+ if (dwc->quirks & DWC3_AMD_NL_PLAT) {
+ reg |= DWC3_GCTL_DISSCRAMBLE;
+ reg |= DWC3_GCTL_U2EXIT_LFPS;
+ reg |= DWC3_GCTL_GBLHIBERNATIONEN;
+ } else
+ reg &= ~DWC3_GCTL_DISSCRAMBLE;
switch (DWC3_GHWPARAMS1_EN_PWROPT(dwc->hwparams.hwparams1)) {
case DWC3_GHWPARAMS1_EN_PWROPT_CLK:
@@ -695,6 +724,8 @@ static int dwc3_probe(struct platform_device *pdev)
dwc->needs_fifo_resize = pdata->tx_fifo_resize;
dwc->dr_mode = pdata->dr_mode;
+
+ dwc->quirks = pdata->quirks;
}
/* default to superspeed if no maximum_speed passed */
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index ccde369..a1c7dc5 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -642,6 +642,7 @@ struct dwc3_scratchpad_array {
* @u1u2: only used on revisions <1.83a for workaround
* @maximum_speed: maximum speed requested (mainly for testing purposes)
* @revision: revision register contents
+ * @quirks: represents different SOCs hardware work-arounds and quirks
* @dr_mode: requested mode of operation
* @usb2_phy: pointer to USB2 PHY
* @usb3_phy: pointer to USB3 PHY
@@ -745,6 +746,10 @@ struct dwc3 {
#define DWC3_REVISION_270A 0x5533270a
#define DWC3_REVISION_280A 0x5533280a
+ u32 quirks;
+
+#define DWC3_AMD_NL_PLAT (1 << 0)
+
enum dwc3_ep0_next ep0_next_event;
enum dwc3_ep0_state ep0state;
enum dwc3_link_state link_state;
diff --git a/drivers/usb/dwc3/dwc3-pci.c b/drivers/usb/dwc3/dwc3-pci.c
index cebbd01..7f471ff 100644
--- a/drivers/usb/dwc3/dwc3-pci.c
+++ b/drivers/usb/dwc3/dwc3-pci.c
@@ -25,6 +25,9 @@
#include <linux/usb/otg.h>
#include <linux/usb/usb_phy_generic.h>
+#include "platform_data.h"
+#include "core.h"
+
/* FIXME define these in <linux/pci_ids.h> */
#define PCI_VENDOR_ID_SYNOPSYS 0x16c3
#define PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3 0xabcd
@@ -102,6 +105,9 @@ static int dwc3_pci_probe(struct pci_dev *pci,
struct dwc3_pci *glue;
int ret;
struct device *dev = &pci->dev;
+ struct dwc3_platform_data dwc3_pdata;
+
+ memset(&dwc3_pdata, 0x00, sizeof(dwc3_pdata));
glue = devm_kzalloc(dev, sizeof(*glue), GFP_KERNEL);
if (!glue)
@@ -148,6 +154,14 @@ static int dwc3_pci_probe(struct pci_dev *pci,
pci_set_drvdata(pci, glue);
+ if (pci->vendor == PCI_VENDOR_ID_AMD &&
+ pci->device == PCI_DEVICE_ID_AMD_NL)
+ dwc3_pdata.quirks |= DWC3_AMD_NL_PLAT;
+
+ ret = platform_device_add_data(dwc3, &dwc3_pdata, sizeof(dwc3_pdata));
+ if (ret)
+ goto err3;
+
dma_set_coherent_mask(&dwc3->dev, dev->coherent_dma_mask);
dwc3->dev.dma_mask = dev->dma_mask;
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 0fcc0a3..8277065 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -2635,6 +2635,7 @@ static irqreturn_t dwc3_interrupt(int irq, void *_dwc)
*/
int dwc3_gadget_init(struct dwc3 *dwc)
{
+ u32 reg;
int ret;
dwc->ctrl_req = dma_alloc_coherent(dwc->dev, sizeof(*dwc->ctrl_req),
@@ -2689,6 +2690,13 @@ int dwc3_gadget_init(struct dwc3 *dwc)
if (ret)
goto err4;
+ if (dwc->quirks & DWC3_AMD_NL_PLAT) {
+ reg = dwc3_readl(dwc->regs, DWC3_DCTL);
+ reg |= DWC3_DCTL_LPM_ERRATA(0xf);
+ dwc3_writel(dwc->regs, DWC3_DCTL, reg);
+ } else
+ reg = 0;
+
ret = usb_add_gadget_udc(dwc->dev, &dwc->gadget);
if (ret) {
dev_err(dwc->dev, "failed to register udc\n");
diff --git a/drivers/usb/dwc3/platform_data.h b/drivers/usb/dwc3/platform_data.h
index 7db34f0..b0ef7fa 100644
--- a/drivers/usb/dwc3/platform_data.h
+++ b/drivers/usb/dwc3/platform_data.h
@@ -24,4 +24,5 @@ struct dwc3_platform_data {
enum usb_device_speed maximum_speed;
enum usb_dr_mode dr_mode;
bool tx_fifo_resize;
+ u32 quirks;
};
--
1.8.1.2
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