mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-22 15:02:32 +00:00
02629d8f87
Targets were build tested and patches are refreshed. Signed-off-by: Luka Perkov <luka@openwrt.org> SVN-Revision: 42463
415 lines
12 KiB
Diff
415 lines
12 KiB
Diff
From 738b350437abfca820dae226549ecf4fb100fa30 Mon Sep 17 00:00:00 2001
|
|
From: Hans de Goede <hdegoede@redhat.com>
|
|
Date: Sun, 5 Jan 2014 00:04:02 +0100
|
|
Subject: [PATCH] ehci-platform: Add support for clks and phy passed through
|
|
devicetree
|
|
|
|
Currently ehci-platform is only used in combination with devicetree when used
|
|
with some Via socs. By extending it to (optionally) get clks and a phy from
|
|
devicetree, and enabling / disabling those on power_on / off, it can be used
|
|
more generically. Specifically after this commit it can be used for the
|
|
ehci controller on Allwinner sunxi SoCs.
|
|
|
|
Since ehci-platform is intended to handle any generic enough non pci ehci
|
|
device, add a "usb-ehci" compatibility string.
|
|
|
|
There already is a usb-ehci device-tree bindings document, update this
|
|
with clks and phy bindings info.
|
|
|
|
Although actually quite generic so far the via,vt8500 compatibilty string
|
|
had its own bindings document. Somehow we even ended up with 2 of them. Since
|
|
these provide no extra information over the generic usb-ehci documentation,
|
|
this patch removes them.
|
|
|
|
The ehci-ppc-of.c driver also claims the usb-ehci compatibility string,
|
|
even though it mostly is ibm,usb-ehci-440epx specific. ehci-platform.c is
|
|
not needed on ppc platforms, so add a !PPC_OF dependency to it to avoid
|
|
2 drivers claiming the same compatibility string getting build on ppc.
|
|
|
|
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
|
|
Acked-by: Alan Stern <stern@rowland.harvard.edu>
|
|
---
|
|
Documentation/devicetree/bindings/usb/usb-ehci.txt | 25 +++-
|
|
.../devicetree/bindings/usb/via,vt8500-ehci.txt | 15 ---
|
|
.../devicetree/bindings/usb/vt8500-ehci.txt | 12 --
|
|
drivers/usb/host/Kconfig | 1 +
|
|
drivers/usb/host/ehci-platform.c | 147 +++++++++++++++++----
|
|
5 files changed, 142 insertions(+), 58 deletions(-)
|
|
delete mode 100644 Documentation/devicetree/bindings/usb/via,vt8500-ehci.txt
|
|
delete mode 100644 Documentation/devicetree/bindings/usb/vt8500-ehci.txt
|
|
|
|
--- a/Documentation/devicetree/bindings/usb/usb-ehci.txt
|
|
+++ b/Documentation/devicetree/bindings/usb/usb-ehci.txt
|
|
@@ -1,19 +1,20 @@
|
|
USB EHCI controllers
|
|
|
|
Required properties:
|
|
- - compatible : should be "usb-ehci".
|
|
+ - compatible : should be "generic-ehci".
|
|
- reg : should contain at least address and length of the standard EHCI
|
|
register set for the device. Optional platform-dependent registers
|
|
(debug-port or other) can be also specified here, but only after
|
|
definition of standard EHCI registers.
|
|
- interrupts : one EHCI interrupt should be described here.
|
|
-If device registers are implemented in big endian mode, the device
|
|
-node should have "big-endian-regs" property.
|
|
-If controller implementation operates with big endian descriptors,
|
|
-"big-endian-desc" property should be specified.
|
|
-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".
|
|
+
|
|
+Optional properties:
|
|
+ - big-endian-regs : boolean, set this for hcds with big-endian registers
|
|
+ - big-endian-desc : boolean, set this for hcds with big-endian descriptors
|
|
+ - big-endian : boolean, for hcds with big-endian-regs + big-endian-desc
|
|
+ - clocks : a list of phandle + clock specifier pairs
|
|
+ - phys : phandle + phy specifier pair
|
|
+ - phy-names : "usb"
|
|
|
|
Example (Sequoia 440EPx):
|
|
ehci@e0000300 {
|
|
@@ -23,3 +24,13 @@ Example (Sequoia 440EPx):
|
|
reg = <0 e0000300 90 0 e0000390 70>;
|
|
big-endian;
|
|
};
|
|
+
|
|
+Example (Allwinner sun4i A10 SoC):
|
|
+ ehci0: usb@01c14000 {
|
|
+ compatible = "allwinner,sun4i-a10-ehci", "generic-ehci";
|
|
+ reg = <0x01c14000 0x100>;
|
|
+ interrupts = <39>;
|
|
+ clocks = <&ahb_gates 1>;
|
|
+ phys = <&usbphy 1>;
|
|
+ phy-names = "usb";
|
|
+ };
|
|
--- a/Documentation/devicetree/bindings/usb/via,vt8500-ehci.txt
|
|
+++ /dev/null
|
|
@@ -1,15 +0,0 @@
|
|
-VIA/Wondermedia VT8500 EHCI Controller
|
|
------------------------------------------------------
|
|
-
|
|
-Required properties:
|
|
-- compatible : "via,vt8500-ehci"
|
|
-- reg : Should contain 1 register ranges(address and length)
|
|
-- interrupts : ehci controller interrupt
|
|
-
|
|
-Example:
|
|
-
|
|
- ehci@d8007900 {
|
|
- compatible = "via,vt8500-ehci";
|
|
- reg = <0xd8007900 0x200>;
|
|
- interrupts = <43>;
|
|
- };
|
|
--- a/Documentation/devicetree/bindings/usb/vt8500-ehci.txt
|
|
+++ /dev/null
|
|
@@ -1,12 +0,0 @@
|
|
-VIA VT8500 and Wondermedia WM8xxx SoC USB controllers.
|
|
-
|
|
-Required properties:
|
|
- - compatible: Should be "via,vt8500-ehci" or "wm,prizm-ehci".
|
|
- - reg: Address range of the ehci registers. size should be 0x200
|
|
- - interrupts: Should contain the ehci interrupt.
|
|
-
|
|
-usb: ehci@D8007100 {
|
|
- compatible = "wm,prizm-ehci", "usb-ehci";
|
|
- reg = <0xD8007100 0x200>;
|
|
- interrupts = <1>;
|
|
-};
|
|
--- a/drivers/usb/host/ehci-platform.c
|
|
+++ b/drivers/usb/host/ehci-platform.c
|
|
@@ -3,6 +3,7 @@
|
|
*
|
|
* Copyright 2007 Steven Brown <sbrown@cortland.com>
|
|
* Copyright 2010-2012 Hauke Mehrtens <hauke@hauke-m.de>
|
|
+ * Copyright 2014 Hans de Goede <hdegoede@redhat.com>
|
|
*
|
|
* Derived from the ohci-ssb driver
|
|
* Copyright 2007 Michael Buesch <m@bues.ch>
|
|
@@ -18,6 +19,7 @@
|
|
*
|
|
* Licensed under the GNU/GPL. See COPYING for details.
|
|
*/
|
|
+#include <linux/clk.h>
|
|
#include <linux/dma-mapping.h>
|
|
#include <linux/err.h>
|
|
#include <linux/kernel.h>
|
|
@@ -25,6 +27,7 @@
|
|
#include <linux/io.h>
|
|
#include <linux/module.h>
|
|
#include <linux/of.h>
|
|
+#include <linux/phy/phy.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/usb.h>
|
|
#include <linux/usb/hcd.h>
|
|
@@ -33,6 +36,13 @@
|
|
#include "ehci.h"
|
|
|
|
#define DRIVER_DESC "EHCI generic platform driver"
|
|
+#define EHCI_MAX_CLKS 3
|
|
+#define hcd_to_ehci_priv(h) ((struct ehci_platform_priv *)hcd_to_ehci(h)->priv)
|
|
+
|
|
+struct ehci_platform_priv {
|
|
+ struct clk *clks[EHCI_MAX_CLKS];
|
|
+ struct phy *phy;
|
|
+};
|
|
|
|
static const char hcd_name[] = "ehci-platform";
|
|
|
|
@@ -45,8 +55,10 @@ static int ehci_platform_reset(struct us
|
|
|
|
hcd->has_tt = pdata->has_tt;
|
|
ehci->has_synopsys_hc_bug = pdata->has_synopsys_hc_bug;
|
|
- ehci->big_endian_desc = pdata->big_endian_desc;
|
|
- ehci->big_endian_mmio = pdata->big_endian_mmio;
|
|
+ if (pdata->big_endian_desc)
|
|
+ ehci->big_endian_desc = 1;
|
|
+ if (pdata->big_endian_mmio)
|
|
+ ehci->big_endian_mmio = 1;
|
|
ehci->ignore_oc = pdata->ignore_oc;
|
|
|
|
if (pdata->pre_setup) {
|
|
@@ -65,38 +77,91 @@ static int ehci_platform_reset(struct us
|
|
return 0;
|
|
}
|
|
|
|
+static int ehci_platform_power_on(struct platform_device *dev)
|
|
+{
|
|
+ struct usb_hcd *hcd = platform_get_drvdata(dev);
|
|
+ struct ehci_platform_priv *priv = hcd_to_ehci_priv(hcd);
|
|
+ int clk, ret;
|
|
+
|
|
+ for (clk = 0; clk < EHCI_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 ehci_platform_power_off(struct platform_device *dev)
|
|
+{
|
|
+ struct usb_hcd *hcd = platform_get_drvdata(dev);
|
|
+ struct ehci_platform_priv *priv = hcd_to_ehci_priv(hcd);
|
|
+ int clk;
|
|
+
|
|
+ if (priv->phy) {
|
|
+ phy_power_off(priv->phy);
|
|
+ phy_exit(priv->phy);
|
|
+ }
|
|
+
|
|
+ for (clk = EHCI_MAX_CLKS - 1; clk >= 0; clk--)
|
|
+ if (priv->clks[clk])
|
|
+ clk_disable_unprepare(priv->clks[clk]);
|
|
+}
|
|
+
|
|
static struct hc_driver __read_mostly ehci_platform_hc_driver;
|
|
|
|
static const struct ehci_driver_overrides platform_overrides __initconst = {
|
|
- .reset = ehci_platform_reset,
|
|
+ .reset = ehci_platform_reset,
|
|
+ .extra_priv_size = sizeof(struct ehci_platform_priv),
|
|
};
|
|
|
|
-static struct usb_ehci_pdata ehci_platform_defaults;
|
|
+static struct usb_ehci_pdata ehci_platform_defaults = {
|
|
+ .power_on = ehci_platform_power_on,
|
|
+ .power_suspend = ehci_platform_power_off,
|
|
+ .power_off = ehci_platform_power_off,
|
|
+};
|
|
|
|
static int ehci_platform_probe(struct platform_device *dev)
|
|
{
|
|
struct usb_hcd *hcd;
|
|
struct resource *res_mem;
|
|
- struct usb_ehci_pdata *pdata;
|
|
- int irq;
|
|
- int err;
|
|
+ struct usb_ehci_pdata *pdata = dev_get_platdata(&dev->dev);
|
|
+ struct ehci_platform_priv *priv;
|
|
+ struct ehci_hcd *ehci;
|
|
+ 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, none of these are set.
|
|
+ * Use reasonable defaults so platforms don't have to provide these
|
|
+ * with DT probing on ARM.
|
|
*/
|
|
- if (!dev_get_platdata(&dev->dev))
|
|
- dev->dev.platform_data = &ehci_platform_defaults;
|
|
+ if (!pdata)
|
|
+ pdata = &ehci_platform_defaults;
|
|
|
|
err = dma_coerce_mask_and_coherent(&dev->dev, DMA_BIT_MASK(32));
|
|
if (err)
|
|
return err;
|
|
|
|
- pdata = dev_get_platdata(&dev->dev);
|
|
-
|
|
irq = platform_get_irq(dev, 0);
|
|
if (irq < 0) {
|
|
dev_err(&dev->dev, "no irq provided");
|
|
@@ -108,17 +173,66 @@ static int ehci_platform_probe(struct pl
|
|
return -ENXIO;
|
|
}
|
|
|
|
+ hcd = usb_create_hcd(&ehci_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_ehci_priv(hcd);
|
|
+ ehci = hcd_to_ehci(hcd);
|
|
+
|
|
+ if (pdata == &ehci_platform_defaults && dev->dev.of_node) {
|
|
+ if (of_property_read_bool(dev->dev.of_node, "big-endian-regs"))
|
|
+ ehci->big_endian_mmio = 1;
|
|
+
|
|
+ if (of_property_read_bool(dev->dev.of_node, "big-endian-desc"))
|
|
+ ehci->big_endian_desc = 1;
|
|
+
|
|
+ if (of_property_read_bool(dev->dev.of_node, "big-endian"))
|
|
+ ehci->big_endian_mmio = ehci->big_endian_desc = 1;
|
|
+
|
|
+#ifndef CONFIG_USB_EHCI_BIG_ENDIAN_MMIO
|
|
+ if (ehci->big_endian_mmio) {
|
|
+ dev_err(&dev->dev,
|
|
+ "Error big-endian-regs not compiled in\n");
|
|
+ err = -EINVAL;
|
|
+ goto err_put_hcd;
|
|
+ }
|
|
+#endif
|
|
+#ifndef CONFIG_USB_EHCI_BIG_ENDIAN_DESC
|
|
+ if (ehci->big_endian_desc) {
|
|
+ dev_err(&dev->dev,
|
|
+ "Error big-endian-desc not compiled in\n");
|
|
+ err = -EINVAL;
|
|
+ goto err_put_hcd;
|
|
+ }
|
|
+#endif
|
|
+ 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 < EHCI_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(&ehci_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;
|
|
@@ -127,22 +241,28 @@ static int ehci_platform_probe(struct pl
|
|
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);
|
|
platform_set_drvdata(dev, hcd);
|
|
|
|
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 == &ehci_platform_defaults)
|
|
+ dev->dev.platform_data = NULL;
|
|
+
|
|
+ usb_put_hcd(hcd);
|
|
|
|
return err;
|
|
}
|
|
@@ -151,13 +271,19 @@ static int ehci_platform_remove(struct p
|
|
{
|
|
struct usb_hcd *hcd = platform_get_drvdata(dev);
|
|
struct usb_ehci_pdata *pdata = dev_get_platdata(&dev->dev);
|
|
+ struct ehci_platform_priv *priv = hcd_to_ehci_priv(hcd);
|
|
+ int clk;
|
|
|
|
usb_remove_hcd(hcd);
|
|
- usb_put_hcd(hcd);
|
|
|
|
if (pdata->power_off)
|
|
pdata->power_off(dev);
|
|
|
|
+ for (clk = 0; clk < EHCI_MAX_CLKS && priv->clks[clk]; clk++)
|
|
+ clk_put(priv->clks[clk]);
|
|
+
|
|
+ usb_put_hcd(hcd);
|
|
+
|
|
if (pdata == &ehci_platform_defaults)
|
|
dev->dev.platform_data = NULL;
|
|
|
|
@@ -208,8 +334,10 @@ static int ehci_platform_resume(struct d
|
|
static const struct of_device_id vt8500_ehci_ids[] = {
|
|
{ .compatible = "via,vt8500-ehci", },
|
|
{ .compatible = "wm,prizm-ehci", },
|
|
+ { .compatible = "generic-ehci", },
|
|
{}
|
|
};
|
|
+MODULE_DEVICE_TABLE(of, vt8500_ehci_ids);
|
|
|
|
static const struct platform_device_id ehci_platform_table[] = {
|
|
{ "ehci-platform", 0 },
|