| Message ID | 1600668815-12135-4-git-send-email-chunfeng.yun@mediatek.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v4,01/11] usb: early: convert to readl_poll_timeout_atomic() | expand |
Hi Chungeng, Thank you for the patch! > From: Chunfeng Yun, Sent: Monday, September 21, 2020 3:13 PM > > Use readl_poll_timeout_atomic() to simplify code > > Cc: Mathias Nyman <mathias.nyman@linux.intel.com> > Cc: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> > Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com> > --- > v4: changes > 1. remove unnecessary parentheses suggested by Yoshihiro > 2. fix the wrong return value suggested by Yoshihiro & Daniel > > v2~v3: no changes > --- > drivers/usb/host/xhci-rcar.c | 43 ++++++++++++------------------------------- > 1 file changed, 12 insertions(+), 31 deletions(-) > > diff --git a/drivers/usb/host/xhci-rcar.c b/drivers/usb/host/xhci-rcar.c > index c1025d3..1bc4fe7 100644 > --- a/drivers/usb/host/xhci-rcar.c > +++ b/drivers/usb/host/xhci-rcar.c > @@ -6,6 +6,7 @@ > */ > > #include <linux/firmware.h> > +#include <linux/iopoll.h> > #include <linux/module.h> > #include <linux/platform_device.h> > #include <linux/of.h> > @@ -127,8 +128,7 @@ static int xhci_rcar_download_firmware(struct usb_hcd *hcd) > void __iomem *regs = hcd->regs; > struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd); > const struct firmware *fw; > - int retval, index, j, time; > - int timeout = 10000; > + int retval, index, j; > u32 data, val, temp; > u32 quirks = 0; > const struct soc_device_attribute *attr; > @@ -166,32 +166,19 @@ static int xhci_rcar_download_firmware(struct usb_hcd *hcd) > temp |= RCAR_USB3_DL_CTRL_FW_SET_DATA0; > writel(temp, regs + RCAR_USB3_DL_CTRL); > > - for (time = 0; time < timeout; time++) { > - val = readl(regs + RCAR_USB3_DL_CTRL); > - if ((val & RCAR_USB3_DL_CTRL_FW_SET_DATA0) == 0) > - break; > - udelay(1); > - } > - if (time == timeout) { > - retval = -ETIMEDOUT; > + retval = readl_poll_timeout_atomic(regs + RCAR_USB3_DL_CTRL, > + val, !(val & RCAR_USB3_DL_CTRL_FW_SET_DATA0), > + 1, 10000); > + if (retval < 0) > break; > - } > } > > temp = readl(regs + RCAR_USB3_DL_CTRL); > temp &= ~RCAR_USB3_DL_CTRL_ENABLE; > writel(temp, regs + RCAR_USB3_DL_CTRL); > > - for (time = 0; time < timeout; time++) { > - val = readl(regs + RCAR_USB3_DL_CTRL); > - if (val & RCAR_USB3_DL_CTRL_FW_SUCCESS) { > - retval = 0; > - break; > - } > - udelay(1); > - } > - if (time == timeout) > - retval = -ETIMEDOUT; > + retval = readl_poll_timeout_atomic((regs + RCAR_USB3_DL_CTRL), We can also remove these unnecessary parentheses like below. + retval = readl_poll_timeout_atomic(regs + RCAR_USB3_DL_CTRL, After fixed this: Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Best regards, Yoshihiro Shimoda
On Wed, 2020-09-23 at 08:47 +0000, Yoshihiro Shimoda wrote: > Hi Chungeng, > > Thank you for the patch! > > > From: Chunfeng Yun, Sent: Monday, September 21, 2020 3:13 PM > > > > Use readl_poll_timeout_atomic() to simplify code > > > > Cc: Mathias Nyman <mathias.nyman@linux.intel.com> > > Cc: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> > > Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com> > > --- > > v4: changes > > 1. remove unnecessary parentheses suggested by Yoshihiro > > 2. fix the wrong return value suggested by Yoshihiro & Daniel > > > > v2~v3: no changes > > --- > > drivers/usb/host/xhci-rcar.c | 43 ++++++++++++------------------------------- > > 1 file changed, 12 insertions(+), 31 deletions(-) > > > > diff --git a/drivers/usb/host/xhci-rcar.c b/drivers/usb/host/xhci-rcar.c > > index c1025d3..1bc4fe7 100644 > > --- a/drivers/usb/host/xhci-rcar.c > > +++ b/drivers/usb/host/xhci-rcar.c > > @@ -6,6 +6,7 @@ > > */ > > > > #include <linux/firmware.h> > > +#include <linux/iopoll.h> > > #include <linux/module.h> > > #include <linux/platform_device.h> > > #include <linux/of.h> > > @@ -127,8 +128,7 @@ static int xhci_rcar_download_firmware(struct usb_hcd *hcd) > > void __iomem *regs = hcd->regs; > > struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd); > > const struct firmware *fw; > > - int retval, index, j, time; > > - int timeout = 10000; > > + int retval, index, j; > > u32 data, val, temp; > > u32 quirks = 0; > > const struct soc_device_attribute *attr; > > @@ -166,32 +166,19 @@ static int xhci_rcar_download_firmware(struct usb_hcd *hcd) > > temp |= RCAR_USB3_DL_CTRL_FW_SET_DATA0; > > writel(temp, regs + RCAR_USB3_DL_CTRL); > > > > - for (time = 0; time < timeout; time++) { > > - val = readl(regs + RCAR_USB3_DL_CTRL); > > - if ((val & RCAR_USB3_DL_CTRL_FW_SET_DATA0) == 0) > > - break; > > - udelay(1); > > - } > > - if (time == timeout) { > > - retval = -ETIMEDOUT; > > + retval = readl_poll_timeout_atomic(regs + RCAR_USB3_DL_CTRL, > > + val, !(val & RCAR_USB3_DL_CTRL_FW_SET_DATA0), > > + 1, 10000); > > + if (retval < 0) > > break; > > - } > > } > > > > temp = readl(regs + RCAR_USB3_DL_CTRL); > > temp &= ~RCAR_USB3_DL_CTRL_ENABLE; > > writel(temp, regs + RCAR_USB3_DL_CTRL); > > > > - for (time = 0; time < timeout; time++) { > > - val = readl(regs + RCAR_USB3_DL_CTRL); > > - if (val & RCAR_USB3_DL_CTRL_FW_SUCCESS) { > > - retval = 0; > > - break; > > - } > > - udelay(1); > > - } > > - if (time == timeout) > > - retval = -ETIMEDOUT; > > + retval = readl_poll_timeout_atomic((regs + RCAR_USB3_DL_CTRL), > > We can also remove these unnecessary parentheses like below. Ok, will remove it, thanks a lot > > + retval = readl_poll_timeout_atomic(regs + RCAR_USB3_DL_CTRL, > > After fixed this: > > Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> > > Best regards, > Yoshihiro Shimoda >
diff --git a/drivers/usb/host/xhci-rcar.c b/drivers/usb/host/xhci-rcar.c index c1025d3..1bc4fe7 100644 --- a/drivers/usb/host/xhci-rcar.c +++ b/drivers/usb/host/xhci-rcar.c @@ -6,6 +6,7 @@ */ #include <linux/firmware.h> +#include <linux/iopoll.h> #include <linux/module.h> #include <linux/platform_device.h> #include <linux/of.h> @@ -127,8 +128,7 @@ static int xhci_rcar_download_firmware(struct usb_hcd *hcd) void __iomem *regs = hcd->regs; struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd); const struct firmware *fw; - int retval, index, j, time; - int timeout = 10000; + int retval, index, j; u32 data, val, temp; u32 quirks = 0; const struct soc_device_attribute *attr; @@ -166,32 +166,19 @@ static int xhci_rcar_download_firmware(struct usb_hcd *hcd) temp |= RCAR_USB3_DL_CTRL_FW_SET_DATA0; writel(temp, regs + RCAR_USB3_DL_CTRL); - for (time = 0; time < timeout; time++) { - val = readl(regs + RCAR_USB3_DL_CTRL); - if ((val & RCAR_USB3_DL_CTRL_FW_SET_DATA0) == 0) - break; - udelay(1); - } - if (time == timeout) { - retval = -ETIMEDOUT; + retval = readl_poll_timeout_atomic(regs + RCAR_USB3_DL_CTRL, + val, !(val & RCAR_USB3_DL_CTRL_FW_SET_DATA0), + 1, 10000); + if (retval < 0) break; - } } temp = readl(regs + RCAR_USB3_DL_CTRL); temp &= ~RCAR_USB3_DL_CTRL_ENABLE; writel(temp, regs + RCAR_USB3_DL_CTRL); - for (time = 0; time < timeout; time++) { - val = readl(regs + RCAR_USB3_DL_CTRL); - if (val & RCAR_USB3_DL_CTRL_FW_SUCCESS) { - retval = 0; - break; - } - udelay(1); - } - if (time == timeout) - retval = -ETIMEDOUT; + retval = readl_poll_timeout_atomic((regs + RCAR_USB3_DL_CTRL), + val, val & RCAR_USB3_DL_CTRL_FW_SUCCESS, 1, 10000); release_firmware(fw); @@ -200,18 +187,12 @@ static int xhci_rcar_download_firmware(struct usb_hcd *hcd) static bool xhci_rcar_wait_for_pll_active(struct usb_hcd *hcd) { - int timeout = 1000; + int retval; u32 val, mask = RCAR_USB3_AXH_STA_PLL_ACTIVE_MASK; - while (timeout > 0) { - val = readl(hcd->regs + RCAR_USB3_AXH_STA); - if ((val & mask) == mask) - return true; - udelay(1); - timeout--; - } - - return false; + retval = readl_poll_timeout_atomic(hcd->regs + RCAR_USB3_AXH_STA, + val, (val & mask) == mask, 1, 1000); + return !retval; } /* This function needs to initialize a "phy" of usb before */
Use readl_poll_timeout_atomic() to simplify code Cc: Mathias Nyman <mathias.nyman@linux.intel.com> Cc: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com> --- v4: changes 1. remove unnecessary parentheses suggested by Yoshihiro 2. fix the wrong return value suggested by Yoshihiro & Daniel v2~v3: no changes --- drivers/usb/host/xhci-rcar.c | 43 ++++++++++++------------------------------- 1 file changed, 12 insertions(+), 31 deletions(-)