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Commit 77dae54a authored by Andrew Lunn's avatar Andrew Lunn Committed by Jason Cooper
Browse files

ARM: Kirkwood: ehci-orion: Add device tree binding 



Based on previous work by Michael Walle and Jason Cooper.

Made their work actually work, which required added interrupt from DT
and auxdata, along with setting the dma_mask, which DT does not
currently do.

Signed-off-by: default avatarAndrew Lunn <andrew@lunn.ch>
Tested-by: default avatarSebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Acked-by: default avatarAlan Stern <stern@rowland.harvard.edu>
Signed-off-by: default avatarJason Cooper <jason@lakedaemon.net>
parent ec65aed9

Documentation/devicetree/bindings/usb/ehci-orion.txt

0 → 100644
+15 −0
Original line number Diff line number Diff line 
* EHCI controller, Orion Marvell variants



Required properties:

- compatible: must be "marvell,orion-ehci"

- reg: physical base address of the controller and length of memory mapped

  region.

- interrupts: The EHCI interrupt



Example:



	ehci@50000 {

		compatible = "marvell,orion-ehci";

		reg = <0x50000 0x1000>;

		interrupts = <19>;

	};

drivers/usb/host/ehci-orion.c

+35 −3
Original line number Diff line number Diff line
@@ -14,6 +14,9 @@ 
#include <linux/mbus.h>

#include <linux/clk.h>

#include <linux/platform_data/usb-ehci-orion.h>

#include <linux/of.h>

#include <linux/of_device.h>

#include <linux/of_irq.h>



#define rdl(off)	__raw_readl(hcd->regs + (off))

#define wrl(off, val)	__raw_writel((val), hcd->regs + (off))
@@ -181,6 +184,8 @@ ehci_orion_conf_mbus_windows(struct usb_hcd *hcd, 
	}

}



static u64 ehci_orion_dma_mask = DMA_BIT_MASK(32);



static int __devinit ehci_orion_drv_probe(struct platform_device *pdev)

{

	struct orion_ehci_data *pd = pdev->dev.platform_data;
@@ -191,12 +196,16 @@ static int __devinit ehci_orion_drv_probe(struct platform_device *pdev) 
	struct clk *clk;

	void __iomem *regs;

	int irq, err;

	enum orion_ehci_phy_ver phy_version;



	if (usb_disabled())

		return -ENODEV;



	pr_debug("Initializing Orion-SoC USB Host Controller\n");



	if (pdev->dev.of_node)

		irq = irq_of_parse_and_map(pdev->dev.of_node, 0);

	else

		irq = platform_get_irq(pdev, 0);

	if (irq <= 0) {

		dev_err(&pdev->dev,
@@ -215,6 +224,14 @@ static int __devinit ehci_orion_drv_probe(struct platform_device *pdev) 
		goto err1;

	}



	/*

	 * Right now device-tree probed devices don't get dma_mask

	 * set. Since shared usb code relies on it, set it here for

	 * now. Once we have dma capability bindings this can go away.

	 */

	if (!pdev->dev.dma_mask)

		pdev->dev.dma_mask = &ehci_orion_dma_mask;



	if (!request_mem_region(res->start, resource_size(res),

				ehci_orion_hc_driver.description)) {

		dev_dbg(&pdev->dev, "controller already in use\n");
@@ -262,7 +279,12 @@ static int __devinit ehci_orion_drv_probe(struct platform_device *pdev) 
	/*

	 * setup Orion USB controller.

	 */

	switch (pd->phy_version) {

	if (pdev->dev.of_node)

		phy_version = EHCI_PHY_NA;

	else

		phy_version = pd->phy_version;



	switch (phy_version) {

	case EHCI_PHY_NA:	/* dont change USB phy settings */

		break;

	case EHCI_PHY_ORION:
@@ -317,9 +339,19 @@ static int __exit ehci_orion_drv_remove(struct platform_device *pdev) 


MODULE_ALIAS("platform:orion-ehci");



static const struct of_device_id ehci_orion_dt_ids[] __devinitdata = {

	{ .compatible = "marvell,orion-ehci", },

	{},

};

MODULE_DEVICE_TABLE(of, ehci_orion_dt_ids);



static struct platform_driver ehci_orion_driver = {

	.probe		= ehci_orion_drv_probe,

	.remove		= __exit_p(ehci_orion_drv_remove),

	.shutdown	= usb_hcd_platform_shutdown,

	.driver.name	= "orion-ehci",

	.driver = {

		.name	= "orion-ehci",

		.owner  = THIS_MODULE,

		.of_match_table = of_match_ptr(ehci_orion_dt_ids),

	},

};