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Date: Mon, 28 Mar 2016 06:55:03 +0000
From: Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>
To: Peter Griffin <peter.griffin@...aro.org>,
Felipe Balbi <balbi@...nel.org>
CC: Gregory CLEMENT <gregory.clement@...e-electrons.com>,
"linux-arm-kernel@...ts.infradead.org"
<linux-arm-kernel@...ts.infradead.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"mathias.nyman@...el.com" <mathias.nyman@...el.com>,
"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
"lee.jones@...aro.org" <lee.jones@...aro.org>,
"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
"maxime.coquelin@...com" <maxime.coquelin@...com>,
"patrice.chotard@...com" <patrice.chotard@...com>,
"stable@...r.kernel.org" <stable@...r.kernel.org>,
"felipe.balbi@...ux.intel.com" <felipe.balbi@...ux.intel.com>
Subject: RE: [PATCH] usb: host: xhci-plat: Make enum xhci_plat_type start at a
non zero value
Hi,
> Sent: Saturday, March 26, 2016 6:11 PM
< snip >
> > ps: there might be bugs there, but it's a holiday and I really shouldn't
> > be spending time on this right now ;-)
>
> I'm also off on holiday now until Sunday 10th April... yay :-)
> >
> > Anyway, have fun testing. Let me know if it doesn't work.
>
> I only have access to STi platforms which were broken by this change.
> Not any of the platforms which rely on the functionality which
> was introduced (although I can't see any reason why your patch wouldn't work).
>
> Maybe Yoshihiro (on CC) could test this on the Renesas platforms and confirm?
Thank you for sending the email to me on CC.
I tested Felipe's patch on Renesas platfroms (R-Car Gen2 and Gen3) and I fixed the patch like the following.
However, my fixes patch might need to clean the code up more.
Changes from Felipe's patch:
- Change function names of xhci_rcar_init_quirk() to xhci_rcar_setup_quirk()
- Add setup_quirk() member and use it for rcar's function.
- Some minor fixes.
---
diff --git a/drivers/usb/host/xhci-mvebu.c b/drivers/usb/host/xhci-mvebu.c
index 1eefc98..1ea6c18 100644
--- a/drivers/usb/host/xhci-mvebu.c
+++ b/drivers/usb/host/xhci-mvebu.c
@@ -41,8 +41,9 @@ static void xhci_mvebu_mbus_config(void __iomem *base,
}
}
-int xhci_mvebu_mbus_init_quirk(struct platform_device *pdev)
+int xhci_mvebu_mbus_init_quirk(struct usb_hcd *hcd)
{
+ struct platform_device *pdev = to_platform_device(hcd->self.controller);
struct resource *res;
void __iomem *base;
const struct mbus_dram_target_info *dram;
diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
index d39d6bf..d28513a 100644
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -47,43 +47,57 @@ static void xhci_plat_quirks(struct device *dev, struct xhci_hcd *xhci)
xhci->quirks |= XHCI_PLAT;
}
+static void xhci_priv_plat_start(struct usb_hcd *hcd)
+{
+ struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd);
+
+ if (priv->plat_start)
+ priv->plat_start(hcd);
+}
+
+static int xhci_priv_setup_quirk(struct usb_hcd *hcd)
+{
+ struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd);
+
+ if (!priv->setup_quirk)
+ return 0;
+
+ return priv->setup_quirk(hcd);
+}
+
/* called during probe() after chip reset completes */
static int xhci_plat_setup(struct usb_hcd *hcd)
{
int ret;
- if (xhci_plat_type_is(hcd, XHCI_PLAT_TYPE_RENESAS_RCAR_GEN2) ||
- xhci_plat_type_is(hcd, XHCI_PLAT_TYPE_RENESAS_RCAR_GEN3)) {
- ret = xhci_rcar_init_quirk(hcd);
- if (ret)
- return ret;
- }
+ ret = xhci_priv_setup_quirk(hcd);
+ if (ret)
+ return ret;
return xhci_gen_setup(hcd, xhci_plat_quirks);
}
static int xhci_plat_start(struct usb_hcd *hcd)
{
- if (xhci_plat_type_is(hcd, XHCI_PLAT_TYPE_RENESAS_RCAR_GEN2) ||
- xhci_plat_type_is(hcd, XHCI_PLAT_TYPE_RENESAS_RCAR_GEN3))
- xhci_rcar_start(hcd);
-
+ xhci_priv_plat_start(hcd);
return xhci_run(hcd);
}
#ifdef CONFIG_OF
static const struct xhci_plat_priv xhci_plat_marvell_armada = {
- .type = XHCI_PLAT_TYPE_MARVELL_ARMADA,
+ .init_quirk = xhci_mvebu_mbus_init_quirk,
};
static const struct xhci_plat_priv xhci_plat_renesas_rcar_gen2 = {
- .type = XHCI_PLAT_TYPE_RENESAS_RCAR_GEN2,
.firmware_name = XHCI_RCAR_FIRMWARE_NAME_V1,
+ .setup_quirk = xhci_rcar_setup_quirk,
+ .plat_start = xhci_rcar_start,
};
static const struct xhci_plat_priv xhci_plat_renesas_rcar_gen3 = {
- .type = XHCI_PLAT_TYPE_RENESAS_RCAR_GEN3,
.firmware_name = XHCI_RCAR_FIRMWARE_NAME_V2,
+ .setup_quirk = xhci_rcar_setup_quirk,
+ .plat_start = xhci_rcar_start,
};
static const struct of_device_id usb_xhci_of_match[] = {
@@ -119,6 +133,7 @@ static int xhci_plat_probe(struct platform_device *pdev)
{
struct device_node *node = pdev->dev.of_node;
struct usb_xhci_pdata *pdata = dev_get_platdata(&pdev->dev);
+ struct xhci_plat_priv *priv;
const struct of_device_id *match;
const struct hc_driver *driver;
struct xhci_hcd *xhci;
@@ -178,18 +193,18 @@ static int xhci_plat_probe(struct platform_device *pdev)
}
xhci = hcd_to_xhci(hcd);
+ priv = hcd_to_xhci_priv(hcd);
match = of_match_node(usb_xhci_of_match, node);
if (match) {
const struct xhci_plat_priv *priv_match = match->data;
- struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd);
/* Just copy data for now */
if (priv_match)
*priv = *priv_match;
}
- if (xhci_plat_type_is(hcd, XHCI_PLAT_TYPE_MARVELL_ARMADA)) {
- ret = xhci_mvebu_mbus_init_quirk(pdev);
+ if (priv->init_quirk) {
+ ret = priv->init_quirk(pdev);
if (ret)
goto disable_clk;
}
diff --git a/drivers/usb/host/xhci-plat.h b/drivers/usb/host/xhci-plat.h
index 5a2e2e3..1d86d6d 100644
--- a/drivers/usb/host/xhci-plat.h
+++ b/drivers/usb/host/xhci-plat.h
@@ -13,27 +13,13 @@
#include "xhci.h" /* for hcd_to_xhci() */
-enum xhci_plat_type {
- XHCI_PLAT_TYPE_MARVELL_ARMADA,
- XHCI_PLAT_TYPE_RENESAS_RCAR_GEN2,
- XHCI_PLAT_TYPE_RENESAS_RCAR_GEN3,
-};
-
struct xhci_plat_priv {
- enum xhci_plat_type type;
const char *firmware_name;
+ void (*plat_start)(struct usb_hcd *);
+ int (*init_quirk)(struct platform_device *pdev);
+ int (*setup_quirk)(struct usb_hcd *);
};
#define hcd_to_xhci_priv(h) ((struct xhci_plat_priv *)hcd_to_xhci(h)->priv)
-static inline bool xhci_plat_type_is(struct usb_hcd *hcd,
- enum xhci_plat_type type)
-{
- struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd);
-
- if (priv && priv->type == type)
- return true;
- else
- return false;
-}
#endif /* _XHCI_PLAT_H */
diff --git a/drivers/usb/host/xhci-rcar.c b/drivers/usb/host/xhci-rcar.c
index 623100e..7b2800c 100644
--- a/drivers/usb/host/xhci-rcar.c
+++ b/drivers/usb/host/xhci-rcar.c
@@ -81,11 +81,13 @@ void xhci_rcar_start(struct usb_hcd *hcd)
u32 temp;
if (hcd->regs != NULL) {
+ struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd);
+
/* Interrupt Enable */
temp = readl(hcd->regs + RCAR_USB3_INT_ENA);
temp |= RCAR_USB3_INT_ENA_VAL;
writel(temp, hcd->regs + RCAR_USB3_INT_ENA);
- if (xhci_plat_type_is(hcd, XHCI_PLAT_TYPE_RENESAS_RCAR_GEN2))
+ if (!strcmp(priv->firmware_name, XHCI_RCAR_FIRMWARE_NAME_V1))
xhci_rcar_start_gen2(hcd);
}
}
@@ -154,7 +156,7 @@ static int xhci_rcar_download_firmware(struct usb_hcd *hcd)
}
/* This function needs to initialize a "phy" of usb before */
-int xhci_rcar_init_quirk(struct usb_hcd *hcd)
+int xhci_rcar_setup_quirk(struct usb_hcd *hcd)
{
/* If hcd->regs is NULL, we don't just call the following function */
if (!hcd->regs)
diff --git a/drivers/usb/host/xhci-rcar.h b/drivers/usb/host/xhci-rcar.h
index 2941a25..05cd539 100644
--- a/drivers/usb/host/xhci-rcar.h
+++ b/drivers/usb/host/xhci-rcar.h
@@ -16,13 +16,13 @@
#if IS_ENABLED(CONFIG_USB_XHCI_RCAR)
void xhci_rcar_start(struct usb_hcd *hcd);
-int xhci_rcar_init_quirk(struct usb_hcd *hcd);
+int xhci_rcar_setup_quirk(struct usb_hcd *hcd);
#else
static inline void xhci_rcar_start(struct usb_hcd *hcd)
{
}
-static inline int xhci_rcar_init_quirk(struct usb_hcd *hcd)
+static inline int xhci_rcar_setup_quirk(struct usb_hcd *hcd)
{
return 0;
}
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