On 11/07/2012 02:35 PM, Vivek Gautam wrote:
@@ -180,10 +273,12 @@ enum samsung_cpu_type {
/*
* struct samsung_usbphy - transceiver driver state
* @phy: transceiver structure
+ * @phy3: transceiver structure for USB 3.0
* @plat: platform data
* @dev: The parent device supplied to the probe function
* @clk: usb phy clock
* @regs: usb phy register memory base
+ * @regs_phy3: usb 3.0 phy register memory base
* @ref_clk_freq: reference clock frequency selection
* @cpu_type: machine identifier
* @phy_type: It keeps track of the PHY type.
@@ -191,10 +286,12 @@ enum samsung_cpu_type {
*/
struct samsung_usbphy {
struct usb_phy phy;
+ struct usb_phy phy3;
struct samsung_usbphy_data *plat;
struct device *dev;
struct clk *clk;
void __iomem *regs;
+ void __iomem *regs_phy3;
Wouldn't it be better to create a new data structure for USB 3.0
and embedding it here, rather than adding multiple fields with "3"
suffix ? E.g.
struct {
void __iomem *phy_regs;
struct usb_phy phy;
} usb3;
?
Yes, thanks for suggesting. This way things will look clearer.
Will update this.
And why do you need to duplicate those fields in first place ?
I guess phy and phy3 are dependant and you can't register 2 PHYs
separately ?
Controllers like DWC3 needs two different PHYs. One of USB2 type and
one of USB3 type. So we needed to register two separate PHYs.
OK, I was just wondering if there is any dependency between those two phys
so you need to aggregate them in one struct samsung_usbphy, rather than
creating two separate struct samsung_usbphy objects for them.
+/*
+ * The function passed to the usb driver for phy initialization
+ */
static int samsung_usbphy_init(struct usb_phy *phy)
{
struct samsung_usbphy *sphy;
@@ -570,6 +872,8 @@ static int __devinit samsung_usbphy_probe(struct platform_device *pdev)
struct device *dev =&pdev->dev;
struct resource *phy_mem;
void __iomem *phy_base;
+ struct resource *phy3_mem;
+ void __iomem *phy3_base = NULL;
struct clk *clk;
int ret = 0;
@@ -618,7 +922,38 @@ static int __devinit samsung_usbphy_probe(struct platform_device *pdev)
sphy->clk = clk;
+ if (sphy->cpu_type == TYPE_EXYNOS5250) {
+ phy3_mem = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ if (!phy3_mem) {
+ dev_err(dev, "%s: missing mem resource\n", __func__);
+ return -ENODEV;
+ }
+
+ phy3_base = devm_request_and_ioremap(dev, phy3_mem);
+ if (!phy3_base) {
+ dev_err(dev, "%s: register mapping failed\n", __func__);
+ return -ENXIO;
+ }
+ }
+
+ sphy->regs_phy3 = phy3_base;
+ sphy->phy3.dev = sphy->dev;
+ sphy->phy3.label = "samsung-usbphy3";
+ sphy->phy3.init = samsung_usbphy3_init;
+ sphy->phy3.shutdown = samsung_usbphy3_shutdown;
+
ret = usb_add_phy(&sphy->phy, USB_PHY_TYPE_USB2);
+ if (ret)
+ return ret;
+
+ if (sphy->cpu_type != TYPE_EXYNOS5250) {
+ dev_warn(dev, "Not a valid cpu_type for USB 3.0\n");
+ } else {
+ ret = usb_add_phy(&sphy->phy3, USB_PHY_TYPE_USB3);
+ if (ret)
+ return ret;
2 redundant lines here.
Will two returns under if return not error codes ? The last return
actually returns success.
If still it needs modification, will do that.
It's up to you how you structure it. The last return returns whatever
value ret has. I can't see what is an advantage of doing something like:
if (ret)
return ret;
return ret;
--
Thanks,
Sylwester
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