| Message ID | 1386246579-25141-5-git-send-email-k.debski@samsung.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Thu, 5 Dec 2013, Kamil Debski wrote: > Change the phy provider used from the old usb phy specific to a new one > using the generic phy framework. > > Signed-off-by: Kamil Debski <k.debski@samsung.com> > Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> > --- a/drivers/usb/host/ehci-exynos.c > +++ b/drivers/usb/host/ehci-exynos.c > @@ -42,10 +42,10 @@ > static const char hcd_name[] = "ehci-exynos"; > static struct hc_driver __read_mostly exynos_ehci_hc_driver; > > +#define PHY_NUMBER 3 > struct exynos_ehci_hcd { > struct clk *clk; > - struct usb_phy *phy; > - struct usb_otg *otg; Are you sure you want to remove that line? > + struct phy *phy[PHY_NUMBER]; > }; > > #define to_exynos_ehci(hcd) (struct exynos_ehci_hcd *)(hcd_to_ehci(hcd)->priv) > @@ -102,13 +132,24 @@ static int exynos_ehci_probe(struct platform_device *pdev) > "samsung,exynos5440-ehci")) > goto skip_phy; > > - phy = devm_usb_get_phy(&pdev->dev, USB_PHY_TYPE_USB2); > - if (IS_ERR(phy)) { > - usb_put_hcd(hcd); > - dev_warn(&pdev->dev, "no platform data or transceiver defined\n"); > - return -EPROBE_DEFER; > - } else { > - exynos_ehci->phy = phy; > + for_each_available_child_of_node(pdev->dev.of_node, child) { > + err = of_property_read_u32(child, "reg", &phy_number); > + if (err) { > + dev_err(&pdev->dev, "Failed to parse device tree\n"); > + return err; > + } > + if (phy_number >= PHY_NUMBER) { > + dev_err(&pdev->dev, "Failed to parse device tree - number out of range\n"); > + return -EINVAL; Do you need to call of_node_put(child) before each of these return statements? > + } > + phy = devm_of_phy_get(&pdev->dev, child, 0); > + of_node_put(child); > + if (IS_ERR(phy)) { > + dev_err(&pdev->dev, "Failed to get phy number %d", > + phy_number); > + return PTR_ERR(phy); > + } > + exynos_ehci->phy[phy_number] = phy; > exynos_ehci->otg = phy->otg; Did you intend to remove this line? Above, you removed the exynos_ehci->otg field. I can't see how this patch would ever compile without an error. > } > > @@ -149,11 +190,11 @@ skip_phy: > goto fail_io; > } > > - if (exynos_ehci->otg) > - exynos_ehci->otg->set_host(exynos_ehci->otg, &hcd->self); > - > - if (exynos_ehci->phy) > - usb_phy_init(exynos_ehci->phy); > + err = exynos_phys_on(exynos_ehci->phy); > + if (err) { > + dev_err(&pdev->dev, "Failed to enabled phys\n"); > + goto fail_phys_on; Why add a new statement label? Just goto fail_io. > + } > > ehci = hcd_to_ehci(hcd); > ehci->caps = hcd->regs; > @@ -172,8 +213,8 @@ skip_phy: > return 0; > > fail_add_hcd: > - if (exynos_ehci->phy) > - usb_phy_shutdown(exynos_ehci->phy); > + exynos_phys_off(exynos_ehci->phy); > +fail_phys_on: > fail_io: > clk_disable_unprepare(exynos_ehci->clk); > fail_clk: Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Hi Alan, Thank you for the review. Please find my replies inline. > From: Alan Stern [mailto:stern@rowland.harvard.edu] > Sent: Thursday, December 05, 2013 7:53 PM > > On Thu, 5 Dec 2013, Kamil Debski wrote: > > > Change the phy provider used from the old usb phy specific to a new > > one using the generic phy framework. > > > > Signed-off-by: Kamil Debski <k.debski@samsung.com> > > Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> > > > --- a/drivers/usb/host/ehci-exynos.c > > +++ b/drivers/usb/host/ehci-exynos.c > > > @@ -42,10 +42,10 @@ > > static const char hcd_name[] = "ehci-exynos"; static struct > > hc_driver __read_mostly exynos_ehci_hc_driver; > > > > +#define PHY_NUMBER 3 > > struct exynos_ehci_hcd { > > struct clk *clk; > > - struct usb_phy *phy; > > - struct usb_otg *otg; > > Are you sure you want to remove that line? Yes, I am. The new generic phy interface does not have the otg field in it. > > + struct phy *phy[PHY_NUMBER]; > > }; > > > > #define to_exynos_ehci(hcd) (struct exynos_ehci_hcd > > *)(hcd_to_ehci(hcd)->priv) > > > @@ -102,13 +132,24 @@ static int exynos_ehci_probe(struct > platform_device *pdev) > > "samsung,exynos5440-ehci")) > > goto skip_phy; > > > > - phy = devm_usb_get_phy(&pdev->dev, USB_PHY_TYPE_USB2); > > - if (IS_ERR(phy)) { > > - usb_put_hcd(hcd); > > - dev_warn(&pdev->dev, "no platform data or transceiver > defined\n"); > > - return -EPROBE_DEFER; > > - } else { > > - exynos_ehci->phy = phy; > > + for_each_available_child_of_node(pdev->dev.of_node, child) { > > + err = of_property_read_u32(child, "reg", &phy_number); > > + if (err) { > > + dev_err(&pdev->dev, "Failed to parse device tree\n"); > > + return err; > > + } > > + if (phy_number >= PHY_NUMBER) { > > + dev_err(&pdev->dev, "Failed to parse device tree - > number out of range\n"); > > + return -EINVAL; > > Do you need to call of_node_put(child) before each of these return > statements? You are right, thank you for spotting this. > > > + } > > + phy = devm_of_phy_get(&pdev->dev, child, 0); > > + of_node_put(child); > > + if (IS_ERR(phy)) { > > + dev_err(&pdev->dev, "Failed to get phy number %d", > > + phy_number); > > + return PTR_ERR(phy); > > + } > > + exynos_ehci->phy[phy_number] = phy; > > exynos_ehci->otg = phy->otg; > > Did you intend to remove this line? Above, you removed the > exynos_ehci->otg field. I can't see how this patch would ever compile > without an error. Yes, I had this in a separate fix patch which I forgot to squash. Sorry for this. > > } > > > > @@ -149,11 +190,11 @@ skip_phy: > > goto fail_io; > > } > > > > - if (exynos_ehci->otg) > > - exynos_ehci->otg->set_host(exynos_ehci->otg, &hcd->self); > > - > > - if (exynos_ehci->phy) > > - usb_phy_init(exynos_ehci->phy); > > + err = exynos_phys_on(exynos_ehci->phy); > > + if (err) { > > + dev_err(&pdev->dev, "Failed to enabled phys\n"); > > + goto fail_phys_on; > > Why add a new statement label? Just goto fail_io. To me it seemed better to add a new label. I will drop it and use goto fail_io, as you suggested. > > > + } > > > > ehci = hcd_to_ehci(hcd); > > ehci->caps = hcd->regs; > > @@ -172,8 +213,8 @@ skip_phy: > > return 0; > > > > fail_add_hcd: > > - if (exynos_ehci->phy) > > - usb_phy_shutdown(exynos_ehci->phy); > > + exynos_phys_off(exynos_ehci->phy); > > +fail_phys_on: > > fail_io: > > clk_disable_unprepare(exynos_ehci->clk); > > fail_clk: > > Alan Stern Best wishes,
diff --git a/Documentation/devicetree/bindings/usb/usb-ehci.txt b/Documentation/devicetree/bindings/usb/usb-ehci.txt index fa18612..413f7cd 100644 --- a/Documentation/devicetree/bindings/usb/usb-ehci.txt +++ b/Documentation/devicetree/bindings/usb/usb-ehci.txt @@ -14,6 +14,10 @@ If controller implementation operates with big endian descriptors, If both big endian registers and descriptors are used by the controller implementation, "big-endian" property can be specified instead of having both "big-endian-regs" and "big-endian-desc". + - port: if in the SoC there are EHCI phys, they should be listed here. +One phy per port. Each port should have its reg entry with a consecutive +number. Also it should contain phys and phy-names entries specifying the +phy used by the port. Example (Sequoia 440EPx): ehci@e0000300 { @@ -23,3 +27,34 @@ Example (Sequoia 440EPx): reg = <0 e0000300 90 0 e0000390 70>; big-endian; }; + +Example (Exynos 4212): + ehci@12580000 { + compatible = "samsung,exynos4210-ehci"; + reg = <0x12580000 0x20000>; + interrupts = <0 70 0>; + clocks = <&clock 304>, <&clock 305>; + clock-names = "usbhost", "otg"; + status = "disabled"; + #address-cells = <1>; + #size-cells = <0>; + port@0 { + reg = <0>; + phys = <&usb2phy 1>; + phy-names = "host"; + status = "disabled"; + }; + port@1 { + reg = <1>; + phys = <&usb2phy 2>; + phy-names = "hsic0"; + status = "disabled"; + }; + port@2 { + reg = <2>; + phys = <&usb2phy 3>; + phy-names = "hsic1"; + status = "disabled"; + }; + }; + diff --git a/drivers/usb/host/ehci-exynos.c b/drivers/usb/host/ehci-exynos.c index e97c198..bb81809 100644 --- a/drivers/usb/host/ehci-exynos.c +++ b/drivers/usb/host/ehci-exynos.c @@ -19,12 +19,12 @@ #include <linux/module.h> #include <linux/of.h> #include <linux/of_gpio.h> +#include <linux/phy/phy.h> #include <linux/platform_device.h> #include <linux/usb/phy.h> #include <linux/usb/samsung_usb_phy.h> #include <linux/usb.h> #include <linux/usb/hcd.h> -#include <linux/usb/otg.h> #include "ehci.h" @@ -42,10 +42,10 @@ static const char hcd_name[] = "ehci-exynos"; static struct hc_driver __read_mostly exynos_ehci_hc_driver; +#define PHY_NUMBER 3 struct exynos_ehci_hcd { struct clk *clk; - struct usb_phy *phy; - struct usb_otg *otg; + struct phy *phy[PHY_NUMBER]; }; #define to_exynos_ehci(hcd) (struct exynos_ehci_hcd *)(hcd_to_ehci(hcd)->priv) @@ -69,13 +69,43 @@ static void exynos_setup_vbus_gpio(struct platform_device *pdev) dev_err(dev, "can't request ehci vbus gpio %d", gpio); } +static int exynos_phys_on(struct phy *p[]) +{ + int i; + int ret = 0; + + for (i = 0; ret == 0 && i < PHY_NUMBER; i++) + if (p[i]) + ret = phy_power_on(p[i]); + if (ret) + for (i--; i > 0; i--) + if (p[i]) + phy_power_off(p[i]); + + return ret; +} + +static int exynos_phys_off(struct phy *p[]) +{ + int i; + int ret = 0; + + for (i = 0; ret == 0 && i < PHY_NUMBER; i++) + if (p[i]) + ret = phy_power_off(p[i]); + + return ret; +} + static int exynos_ehci_probe(struct platform_device *pdev) { struct exynos_ehci_hcd *exynos_ehci; struct usb_hcd *hcd; struct ehci_hcd *ehci; struct resource *res; - struct usb_phy *phy; + struct phy *phy; + struct device_node *child; + int phy_number; int irq; int err; @@ -102,13 +132,24 @@ static int exynos_ehci_probe(struct platform_device *pdev) "samsung,exynos5440-ehci")) goto skip_phy; - phy = devm_usb_get_phy(&pdev->dev, USB_PHY_TYPE_USB2); - if (IS_ERR(phy)) { - usb_put_hcd(hcd); - dev_warn(&pdev->dev, "no platform data or transceiver defined\n"); - return -EPROBE_DEFER; - } else { - exynos_ehci->phy = phy; + for_each_available_child_of_node(pdev->dev.of_node, child) { + err = of_property_read_u32(child, "reg", &phy_number); + if (err) { + dev_err(&pdev->dev, "Failed to parse device tree\n"); + return err; + } + if (phy_number >= PHY_NUMBER) { + dev_err(&pdev->dev, "Failed to parse device tree - number out of range\n"); + return -EINVAL; + } + phy = devm_of_phy_get(&pdev->dev, child, 0); + of_node_put(child); + if (IS_ERR(phy)) { + dev_err(&pdev->dev, "Failed to get phy number %d", + phy_number); + return PTR_ERR(phy); + } + exynos_ehci->phy[phy_number] = phy; exynos_ehci->otg = phy->otg; } @@ -149,11 +190,11 @@ skip_phy: goto fail_io; } - if (exynos_ehci->otg) - exynos_ehci->otg->set_host(exynos_ehci->otg, &hcd->self); - - if (exynos_ehci->phy) - usb_phy_init(exynos_ehci->phy); + err = exynos_phys_on(exynos_ehci->phy); + if (err) { + dev_err(&pdev->dev, "Failed to enabled phys\n"); + goto fail_phys_on; + } ehci = hcd_to_ehci(hcd); ehci->caps = hcd->regs; @@ -172,8 +213,8 @@ skip_phy: return 0; fail_add_hcd: - if (exynos_ehci->phy) - usb_phy_shutdown(exynos_ehci->phy); + exynos_phys_off(exynos_ehci->phy); +fail_phys_on: fail_io: clk_disable_unprepare(exynos_ehci->clk); fail_clk: @@ -188,11 +229,7 @@ static int exynos_ehci_remove(struct platform_device *pdev) usb_remove_hcd(hcd); - if (exynos_ehci->otg) - exynos_ehci->otg->set_host(exynos_ehci->otg, &hcd->self); - - if (exynos_ehci->phy) - usb_phy_shutdown(exynos_ehci->phy); + exynos_phys_off(exynos_ehci->phy); clk_disable_unprepare(exynos_ehci->clk); @@ -212,11 +249,7 @@ static int exynos_ehci_suspend(struct device *dev) rc = ehci_suspend(hcd, do_wakeup); - if (exynos_ehci->otg) - exynos_ehci->otg->set_host(exynos_ehci->otg, &hcd->self); - - if (exynos_ehci->phy) - usb_phy_shutdown(exynos_ehci->phy); + exynos_phys_off(exynos_ehci->phy); clk_disable_unprepare(exynos_ehci->clk); @@ -230,11 +263,7 @@ static int exynos_ehci_resume(struct device *dev) clk_prepare_enable(exynos_ehci->clk); - if (exynos_ehci->otg) - exynos_ehci->otg->set_host(exynos_ehci->otg, &hcd->self); - - if (exynos_ehci->phy) - usb_phy_init(exynos_ehci->phy); + exynos_phys_on(exynos_ehci->phy); /* DMA burst Enable */ writel(EHCI_INSNREG00_ENABLE_DMA_BURST, EHCI_INSNREG00(hcd->regs));