mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-25 16:31:13 +00:00
323 lines
8.4 KiB
Diff
323 lines
8.4 KiB
Diff
From 6b63b9b2093258541dd79a3ed311cd1d0412b846 Mon Sep 17 00:00:00 2001
|
|
From: Hans de Goede <hdegoede@redhat.com>
|
|
Date: Sun, 5 Jan 2014 14:42:39 +0100
|
|
Subject: [PATCH] ohci-platform: Add support for devicetree instantiation
|
|
|
|
Add support for ohci-platform instantiation from devicetree, including
|
|
optionally getting clks and a phy from devicetree, and enabling / disabling
|
|
those on power_on / off.
|
|
|
|
This should allow using ohci-platform from devicetree in various cases.
|
|
Specifically after this commit it can be used for the ohci controller found
|
|
on Allwinner sunxi SoCs.
|
|
|
|
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
|
|
Acked-by: Alan Stern <stern@rowland.harvard.edu>
|
|
---
|
|
Documentation/devicetree/bindings/usb/usb-ohci.txt | 22 +++
|
|
drivers/usb/host/ohci-platform.c | 162 ++++++++++++++++++---
|
|
2 files changed, 162 insertions(+), 22 deletions(-)
|
|
create mode 100644 Documentation/devicetree/bindings/usb/usb-ohci.txt
|
|
|
|
diff --git a/Documentation/devicetree/bindings/usb/usb-ohci.txt b/Documentation/devicetree/bindings/usb/usb-ohci.txt
|
|
new file mode 100644
|
|
index 0000000..6ba38d9
|
|
--- /dev/null
|
|
+++ b/Documentation/devicetree/bindings/usb/usb-ohci.txt
|
|
@@ -0,0 +1,22 @@
|
|
+USB OHCI controllers
|
|
+
|
|
+Required properties:
|
|
+- compatible : "usb-ohci"
|
|
+- reg : ohci controller register range (address and length)
|
|
+- interrupts : ohci controller interrupt
|
|
+
|
|
+Optional properties:
|
|
+- clocks : a list of phandle + clock specifier pairs
|
|
+- phys : phandle + phy specifier pair
|
|
+- phy-names : "usb"
|
|
+
|
|
+Example:
|
|
+
|
|
+ ohci0: usb@01c14400 {
|
|
+ compatible = "allwinner,sun4i-a10-ohci", "usb-ohci";
|
|
+ reg = <0x01c14400 0x100>;
|
|
+ interrupts = <64>;
|
|
+ clocks = <&usb_clk 6>, <&ahb_gates 2>;
|
|
+ phys = <&usbphy 1>;
|
|
+ phy-names = "usb";
|
|
+ };
|
|
diff --git a/drivers/usb/host/ohci-platform.c b/drivers/usb/host/ohci-platform.c
|
|
index 68f674c..49304dd 100644
|
|
--- a/drivers/usb/host/ohci-platform.c
|
|
+++ b/drivers/usb/host/ohci-platform.c
|
|
@@ -3,6 +3,7 @@
|
|
*
|
|
* Copyright 2007 Michael Buesch <m@bues.ch>
|
|
* Copyright 2011-2012 Hauke Mehrtens <hauke@hauke-m.de>
|
|
+ * Copyright 2014 Hans de Goede <hdegoede@redhat.com>
|
|
*
|
|
* Derived from the OCHI-SSB driver
|
|
* Derived from the OHCI-PCI driver
|
|
@@ -14,11 +15,14 @@
|
|
* Licensed under the GNU/GPL. See COPYING for details.
|
|
*/
|
|
|
|
+#include <linux/clk.h>
|
|
+#include <linux/dma-mapping.h>
|
|
#include <linux/hrtimer.h>
|
|
#include <linux/io.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/err.h>
|
|
+#include <linux/phy/phy.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/usb/ohci_pdriver.h>
|
|
#include <linux/usb.h>
|
|
@@ -27,6 +31,13 @@
|
|
#include "ohci.h"
|
|
|
|
#define DRIVER_DESC "OHCI generic platform driver"
|
|
+#define OHCI_MAX_CLKS 3
|
|
+#define hcd_to_ohci_priv(h) ((struct ohci_platform_priv *)hcd_to_ohci(h)->priv)
|
|
+
|
|
+struct ohci_platform_priv {
|
|
+ struct clk *clks[OHCI_MAX_CLKS];
|
|
+ struct phy *phy;
|
|
+};
|
|
|
|
static const char hcd_name[] = "ohci-platform";
|
|
|
|
@@ -48,11 +59,67 @@ static int ohci_platform_reset(struct usb_hcd *hcd)
|
|
return ohci_setup(hcd);
|
|
}
|
|
|
|
+static int ohci_platform_power_on(struct platform_device *dev)
|
|
+{
|
|
+ struct usb_hcd *hcd = platform_get_drvdata(dev);
|
|
+ struct ohci_platform_priv *priv = hcd_to_ohci_priv(hcd);
|
|
+ int clk, ret;
|
|
+
|
|
+ for (clk = 0; clk < OHCI_MAX_CLKS && priv->clks[clk]; clk++) {
|
|
+ ret = clk_prepare_enable(priv->clks[clk]);
|
|
+ if (ret)
|
|
+ goto err_disable_clks;
|
|
+ }
|
|
+
|
|
+ if (priv->phy) {
|
|
+ ret = phy_init(priv->phy);
|
|
+ if (ret)
|
|
+ goto err_disable_clks;
|
|
+
|
|
+ ret = phy_power_on(priv->phy);
|
|
+ if (ret)
|
|
+ goto err_exit_phy;
|
|
+ }
|
|
+
|
|
+ return 0;
|
|
+
|
|
+err_exit_phy:
|
|
+ phy_exit(priv->phy);
|
|
+err_disable_clks:
|
|
+ while (--clk >= 0)
|
|
+ clk_disable_unprepare(priv->clks[clk]);
|
|
+
|
|
+ return ret;
|
|
+}
|
|
+
|
|
+static void ohci_platform_power_off(struct platform_device *dev)
|
|
+{
|
|
+ struct usb_hcd *hcd = platform_get_drvdata(dev);
|
|
+ struct ohci_platform_priv *priv = hcd_to_ohci_priv(hcd);
|
|
+ int clk;
|
|
+
|
|
+ if (priv->phy) {
|
|
+ phy_power_off(priv->phy);
|
|
+ phy_exit(priv->phy);
|
|
+ }
|
|
+
|
|
+ for (clk = OHCI_MAX_CLKS - 1; clk >= 0; clk--)
|
|
+ if (priv->clks[clk])
|
|
+ clk_disable_unprepare(priv->clks[clk]);
|
|
+}
|
|
+
|
|
static struct hc_driver __read_mostly ohci_platform_hc_driver;
|
|
|
|
static const struct ohci_driver_overrides platform_overrides __initconst = {
|
|
- .product_desc = "Generic Platform OHCI controller",
|
|
- .reset = ohci_platform_reset,
|
|
+ .product_desc = "Generic Platform OHCI controller",
|
|
+ .reset = ohci_platform_reset,
|
|
+ .extra_priv_size = sizeof(struct ohci_platform_priv),
|
|
+};
|
|
+
|
|
+static struct usb_ohci_pdata ohci_platform_defaults = {
|
|
+ .power_on = ohci_platform_power_on,
|
|
+ .power_suspend = ohci_platform_power_off,
|
|
+ .power_off = ohci_platform_power_off,
|
|
};
|
|
|
|
static int ohci_platform_probe(struct platform_device *dev)
|
|
@@ -60,17 +127,23 @@ static int ohci_platform_probe(struct platform_device *dev)
|
|
struct usb_hcd *hcd;
|
|
struct resource *res_mem;
|
|
struct usb_ohci_pdata *pdata = dev_get_platdata(&dev->dev);
|
|
- int irq;
|
|
- int err = -ENOMEM;
|
|
-
|
|
- if (!pdata) {
|
|
- WARN_ON(1);
|
|
- return -ENODEV;
|
|
- }
|
|
+ struct ohci_platform_priv *priv;
|
|
+ int err, irq, clk = 0;
|
|
|
|
if (usb_disabled())
|
|
return -ENODEV;
|
|
|
|
+ /*
|
|
+ * Use reasonable defaults so platforms don't have to provide these
|
|
+ * with DT probing on ARM.
|
|
+ */
|
|
+ if (!pdata)
|
|
+ pdata = &ohci_platform_defaults;
|
|
+
|
|
+ err = dma_coerce_mask_and_coherent(&dev->dev, DMA_BIT_MASK(32));
|
|
+ if (err)
|
|
+ return err;
|
|
+
|
|
irq = platform_get_irq(dev, 0);
|
|
if (irq < 0) {
|
|
dev_err(&dev->dev, "no irq provided");
|
|
@@ -83,17 +156,40 @@ static int ohci_platform_probe(struct platform_device *dev)
|
|
return -ENXIO;
|
|
}
|
|
|
|
+ hcd = usb_create_hcd(&ohci_platform_hc_driver, &dev->dev,
|
|
+ dev_name(&dev->dev));
|
|
+ if (!hcd)
|
|
+ return -ENOMEM;
|
|
+
|
|
+ platform_set_drvdata(dev, hcd);
|
|
+ dev->dev.platform_data = pdata;
|
|
+ priv = hcd_to_ohci_priv(hcd);
|
|
+
|
|
+ if (pdata == &ohci_platform_defaults && dev->dev.of_node) {
|
|
+ priv->phy = devm_phy_get(&dev->dev, "usb");
|
|
+ if (IS_ERR(priv->phy)) {
|
|
+ err = PTR_ERR(priv->phy);
|
|
+ if (err == -EPROBE_DEFER)
|
|
+ goto err_put_hcd;
|
|
+ priv->phy = NULL;
|
|
+ }
|
|
+
|
|
+ for (clk = 0; clk < OHCI_MAX_CLKS; clk++) {
|
|
+ priv->clks[clk] = of_clk_get(dev->dev.of_node, clk);
|
|
+ if (IS_ERR(priv->clks[clk])) {
|
|
+ err = PTR_ERR(priv->clks[clk]);
|
|
+ if (err == -EPROBE_DEFER)
|
|
+ goto err_put_clks;
|
|
+ priv->clks[clk] = NULL;
|
|
+ break;
|
|
+ }
|
|
+ }
|
|
+ }
|
|
+
|
|
if (pdata->power_on) {
|
|
err = pdata->power_on(dev);
|
|
if (err < 0)
|
|
- return err;
|
|
- }
|
|
-
|
|
- hcd = usb_create_hcd(&ohci_platform_hc_driver, &dev->dev,
|
|
- dev_name(&dev->dev));
|
|
- if (!hcd) {
|
|
- err = -ENOMEM;
|
|
- goto err_power;
|
|
+ goto err_put_clks;
|
|
}
|
|
|
|
hcd->rsrc_start = res_mem->start;
|
|
@@ -102,11 +198,11 @@ static int ohci_platform_probe(struct platform_device *dev)
|
|
hcd->regs = devm_ioremap_resource(&dev->dev, res_mem);
|
|
if (IS_ERR(hcd->regs)) {
|
|
err = PTR_ERR(hcd->regs);
|
|
- goto err_put_hcd;
|
|
+ goto err_power;
|
|
}
|
|
err = usb_add_hcd(hcd, irq, IRQF_SHARED);
|
|
if (err)
|
|
- goto err_put_hcd;
|
|
+ goto err_power;
|
|
|
|
device_wakeup_enable(hcd->self.controller);
|
|
|
|
@@ -114,11 +210,17 @@ static int ohci_platform_probe(struct platform_device *dev)
|
|
|
|
return err;
|
|
|
|
-err_put_hcd:
|
|
- usb_put_hcd(hcd);
|
|
err_power:
|
|
if (pdata->power_off)
|
|
pdata->power_off(dev);
|
|
+err_put_clks:
|
|
+ while (--clk >= 0)
|
|
+ clk_put(priv->clks[clk]);
|
|
+err_put_hcd:
|
|
+ if (pdata == &ohci_platform_defaults)
|
|
+ dev->dev.platform_data = NULL;
|
|
+
|
|
+ usb_put_hcd(hcd);
|
|
|
|
return err;
|
|
}
|
|
@@ -127,13 +229,22 @@ static int ohci_platform_remove(struct platform_device *dev)
|
|
{
|
|
struct usb_hcd *hcd = platform_get_drvdata(dev);
|
|
struct usb_ohci_pdata *pdata = dev_get_platdata(&dev->dev);
|
|
+ struct ohci_platform_priv *priv = hcd_to_ohci_priv(hcd);
|
|
+ int clk;
|
|
|
|
usb_remove_hcd(hcd);
|
|
- usb_put_hcd(hcd);
|
|
|
|
if (pdata->power_off)
|
|
pdata->power_off(dev);
|
|
|
|
+ for (clk = 0; clk < OHCI_MAX_CLKS && priv->clks[clk]; clk++)
|
|
+ clk_put(priv->clks[clk]);
|
|
+
|
|
+ usb_put_hcd(hcd);
|
|
+
|
|
+ if (pdata == &ohci_platform_defaults)
|
|
+ dev->dev.platform_data = NULL;
|
|
+
|
|
return 0;
|
|
}
|
|
|
|
@@ -180,6 +291,12 @@ static int ohci_platform_resume(struct device *dev)
|
|
#define ohci_platform_resume NULL
|
|
#endif /* CONFIG_PM */
|
|
|
|
+static const struct of_device_id ohci_platform_ids[] = {
|
|
+ { .compatible = "usb-ohci", },
|
|
+ { }
|
|
+};
|
|
+MODULE_DEVICE_TABLE(of, ohci_platform_ids);
|
|
+
|
|
static const struct platform_device_id ohci_platform_table[] = {
|
|
{ "ohci-platform", 0 },
|
|
{ }
|
|
@@ -200,6 +317,7 @@ static int ohci_platform_resume(struct device *dev)
|
|
.owner = THIS_MODULE,
|
|
.name = "ohci-platform",
|
|
.pm = &ohci_platform_pm_ops,
|
|
+ .of_match_table = ohci_platform_ids,
|
|
}
|
|
};
|
|
|
|
--
|
|
1.8.5.5
|
|
|