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Commit 3a082ec9 authored by Neil Zhang's avatar Neil Zhang Committed by Felipe Balbi
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USB: EHCI: Add Marvell Host Controller driver 



This patch adds support for EHCI compliant HSUSB Host controller found
on Marvell Socs.

It fits both OTG and SPH controller on marvell Socs, including
PXA9xx/MMP2/MMP3/MGx.

Signed-off-by: default avatarNeil Zhang <zhangwm@marvell.com>
Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
parent 277164f0

drivers/usb/host/Kconfig

+9 −0
Original line number Diff line number Diff line
@@ -194,6 +194,15 @@ config USB_EHCI_S5P 
       help

	 Enable support for the S5P SOC's on-chip EHCI controller.



config USB_EHCI_MV

	bool "EHCI support for Marvell on-chip controller"

	depends on USB_EHCI_HCD

	select USB_EHCI_ROOT_HUB_TT

	---help---

	  Enables support for Marvell (including PXA and MMP series) on-chip

	  USB SPH and OTG controller. SPH is a single port host, and it can

	  only be EHCI host. OTG is controller that can switch to host mode.



config USB_W90X900_EHCI

	bool "W90X900(W90P910) EHCI support"

	depends on USB_EHCI_HCD && ARCH_W90X900

drivers/usb/host/ehci-hcd.c

+5 −0
Original line number Diff line number Diff line
@@ -1329,6 +1329,11 @@ MODULE_LICENSE ("GPL"); 
#define PLATFORM_DRIVER		ehci_xls_driver

#endif



#ifdef CONFIG_USB_EHCI_MV

#include "ehci-mv.c"

#define        PLATFORM_DRIVER         ehci_mv_driver

#endif



#if !defined(PCI_DRIVER) && !defined(PLATFORM_DRIVER) && \

    !defined(PS3_SYSTEM_BUS_DRIVER) && !defined(OF_PLATFORM_DRIVER) && \

    !defined(XILINX_OF_PLATFORM_DRIVER)

drivers/usb/host/ehci-mv.c

0 → 100644
+391 −0
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2011 Marvell International Ltd. All rights reserved.

 * Author: Chao Xie <chao.xie@marvell.com>

 *        Neil Zhang <zhangwm@marvell.com>

 *

 * This program is free software; you can redistribute  it and/or modify it

 * under  the terms of  the GNU General  Public License as published by the

 * Free Software Foundation;  either version 2 of the  License, or (at your

 * option) any later version.

 */



#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/platform_device.h>

#include <linux/clk.h>

#include <linux/usb/otg.h>

#include <linux/platform_data/mv_usb.h>



#define CAPLENGTH_MASK         (0xff)



struct ehci_hcd_mv {

	struct usb_hcd *hcd;



	/* Which mode does this ehci running OTG/Host ? */

	int mode;



	void __iomem *phy_regs;

	void __iomem *cap_regs;

	void __iomem *op_regs;



	struct otg_transceiver *otg;



	struct mv_usb_platform_data *pdata;



	/* clock source and total clock number */

	unsigned int clknum;

	struct clk *clk[0];

};



static void ehci_clock_enable(struct ehci_hcd_mv *ehci_mv)

{

	unsigned int i;



	for (i = 0; i < ehci_mv->clknum; i++)

		clk_enable(ehci_mv->clk[i]);

}



static void ehci_clock_disable(struct ehci_hcd_mv *ehci_mv)

{

	unsigned int i;



	for (i = 0; i < ehci_mv->clknum; i++)

		clk_disable(ehci_mv->clk[i]);

}



static int mv_ehci_enable(struct ehci_hcd_mv *ehci_mv)

{

	int retval;



	ehci_clock_enable(ehci_mv);

	if (ehci_mv->pdata->phy_init) {

		retval = ehci_mv->pdata->phy_init(ehci_mv->phy_regs);

		if (retval)

			return retval;

	}



	return 0;

}



static void mv_ehci_disable(struct ehci_hcd_mv *ehci_mv)

{

	if (ehci_mv->pdata->phy_deinit)

		ehci_mv->pdata->phy_deinit(ehci_mv->phy_regs);

	ehci_clock_disable(ehci_mv);

}



static int mv_ehci_reset(struct usb_hcd *hcd)

{

	struct ehci_hcd *ehci = hcd_to_ehci(hcd);

	struct device *dev = hcd->self.controller;

	struct ehci_hcd_mv *ehci_mv = dev_get_drvdata(dev);

	int retval;



	if (ehci_mv == NULL) {

		dev_err(dev, "Can not find private ehci data\n");

		return -ENODEV;

	}



	/*

	 * data structure init

	 */

	retval = ehci_init(hcd);

	if (retval) {

		dev_err(dev, "ehci_init failed %d\n", retval);

		return retval;

	}



	hcd->has_tt = 1;

	ehci->sbrn = 0x20;



	retval = ehci_reset(ehci);

	if (retval) {

		dev_err(dev, "ehci_reset failed %d\n", retval);

		return retval;

	}



	return 0;

}



static const struct hc_driver mv_ehci_hc_driver = {

	.description = hcd_name,

	.product_desc = "Marvell EHCI",

	.hcd_priv_size = sizeof(struct ehci_hcd),



	/*

	 * generic hardware linkage

	 */

	.irq = ehci_irq,

	.flags = HCD_MEMORY | HCD_USB2,



	/*

	 * basic lifecycle operations

	 */

	.reset = mv_ehci_reset,

	.start = ehci_run,

	.stop = ehci_stop,

	.shutdown = ehci_shutdown,



	/*

	 * managing i/o requests and associated device resources

	 */

	.urb_enqueue = ehci_urb_enqueue,

	.urb_dequeue = ehci_urb_dequeue,

	.endpoint_disable = ehci_endpoint_disable,

	.endpoint_reset = ehci_endpoint_reset,

	.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,



	/*

	 * scheduling support

	 */

	.get_frame_number = ehci_get_frame,



	/*

	 * root hub support

	 */

	.hub_status_data = ehci_hub_status_data,

	.hub_control = ehci_hub_control,

	.bus_suspend = ehci_bus_suspend,

	.bus_resume = ehci_bus_resume,

};



static int mv_ehci_probe(struct platform_device *pdev)

{

	struct mv_usb_platform_data *pdata = pdev->dev.platform_data;

	struct usb_hcd *hcd;

	struct ehci_hcd *ehci;

	struct ehci_hcd_mv *ehci_mv;

	struct resource *r;

	int clk_i, retval = -ENODEV;

	u32 offset;

	size_t size;



	if (!pdata) {

		dev_err(&pdev->dev, "missing platform_data\n");

		return -ENODEV;

	}



	if (usb_disabled())

		return -ENODEV;



	hcd = usb_create_hcd(&mv_ehci_hc_driver, &pdev->dev, "mv ehci");

	if (!hcd)

		return -ENOMEM;



	size = sizeof(*ehci_mv) + sizeof(struct clk *) * pdata->clknum;

	ehci_mv = kzalloc(size, GFP_KERNEL);

	if (ehci_mv == NULL) {

		dev_err(&pdev->dev, "cannot allocate ehci_hcd_mv\n");

		retval = -ENOMEM;

		goto err_put_hcd;

	}



	platform_set_drvdata(pdev, ehci_mv);

	ehci_mv->pdata = pdata;

	ehci_mv->hcd = hcd;



	ehci_mv->clknum = pdata->clknum;

	for (clk_i = 0; clk_i < ehci_mv->clknum; clk_i++) {

		ehci_mv->clk[clk_i] =

		    clk_get(&pdev->dev, pdata->clkname[clk_i]);

		if (IS_ERR(ehci_mv->clk[clk_i])) {

			dev_err(&pdev->dev, "error get clck \"%s\"\n",

				pdata->clkname[clk_i]);

			retval = PTR_ERR(ehci_mv->clk[clk_i]);

			goto err_put_clk;

		}

	}



	r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "phyregs");

	if (r == NULL) {

		dev_err(&pdev->dev, "no phy I/O memory resource defined\n");

		retval = -ENODEV;

		goto err_put_clk;

	}



	ehci_mv->phy_regs = ioremap(r->start, resource_size(r));

	if (ehci_mv->phy_regs == 0) {

		dev_err(&pdev->dev, "failed to map phy I/O memory\n");

		retval = -EFAULT;

		goto err_put_clk;

	}



	r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "capregs");

	if (!r) {

		dev_err(&pdev->dev, "no I/O memory resource defined\n");

		retval = -ENODEV;

		goto err_iounmap_phyreg;

	}



	ehci_mv->cap_regs = ioremap(r->start, resource_size(r));

	if (ehci_mv->cap_regs == NULL) {

		dev_err(&pdev->dev, "failed to map I/O memory\n");

		retval = -EFAULT;

		goto err_iounmap_phyreg;

	}



	retval = mv_ehci_enable(ehci_mv);

	if (retval) {

		dev_err(&pdev->dev, "init phy error %d\n", retval);

		goto err_iounmap_capreg;

	}



	offset = readl(ehci_mv->cap_regs) & CAPLENGTH_MASK;

	ehci_mv->op_regs =

		(void __iomem *) ((unsigned long) ehci_mv->cap_regs + offset);



	hcd->rsrc_start = r->start;

	hcd->rsrc_len = r->end - r->start + 1;

	hcd->regs = ehci_mv->op_regs;



	hcd->irq = platform_get_irq(pdev, 0);

	if (!hcd->irq) {

		dev_err(&pdev->dev, "Cannot get irq.");

		retval = -ENODEV;

		goto err_disable_clk;

	}



	ehci = hcd_to_ehci(hcd);

	ehci->caps = (struct ehci_caps *) ehci_mv->cap_regs;

	ehci->regs = (struct ehci_regs *) ehci_mv->op_regs;

	ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);



	ehci_mv->mode = pdata->mode;

	if (ehci_mv->mode == MV_USB_MODE_OTG) {

#ifdef CONFIG_USB_OTG_UTILS

		ehci_mv->otg = otg_get_transceiver();

		if (!ehci_mv->otg) {

			dev_err(&pdev->dev,

				"unable to find transceiver\n");

			retval = -ENODEV;

			goto err_disable_clk;

		}



		retval = otg_set_host(ehci_mv->otg, &hcd->self);

		if (retval < 0) {

			dev_err(&pdev->dev,

				"unable to register with transceiver\n");

			retval = -ENODEV;

			goto err_put_transceiver;

		}

		/* otg will enable clock before use as host */

		mv_ehci_disable(ehci_mv);

#else

		dev_info(&pdev->dev, "MV_USB_MODE_OTG "

			 "must have CONFIG_USB_OTG_UTILS enabled\n");

		goto err_disable_clk;

#endif

	} else {

		if (pdata->set_vbus)

			pdata->set_vbus(1);



		retval = usb_add_hcd(hcd, hcd->irq, IRQF_SHARED);

		if (retval) {

			dev_err(&pdev->dev,

				"failed to add hcd with err %d\n", retval);

			goto err_set_vbus;

		}

	}



	if (pdata->private_init)

		pdata->private_init(ehci_mv->op_regs, ehci_mv->phy_regs);



	dev_info(&pdev->dev,

		 "successful find EHCI device with regs 0x%p irq %d"

		 " working in %s mode\n", hcd->regs, hcd->irq,

		 ehci_mv->mode == MV_USB_MODE_OTG ? "OTG" : "Host");



	return 0;



err_set_vbus:

	if (pdata->set_vbus)

		pdata->set_vbus(0);

#ifdef CONFIG_USB_OTG_UTILS

err_put_transceiver:

	if (ehci_mv->otg)

		otg_put_transceiver(ehci_mv->otg);

#endif

err_disable_clk:

	mv_ehci_disable(ehci_mv);

err_iounmap_capreg:

	iounmap(ehci_mv->cap_regs);

err_iounmap_phyreg:

	iounmap(ehci_mv->phy_regs);

err_put_clk:

	for (clk_i--; clk_i >= 0; clk_i--)

		clk_put(ehci_mv->clk[clk_i]);

	platform_set_drvdata(pdev, NULL);

	kfree(ehci_mv);

err_put_hcd:

	usb_put_hcd(hcd);



	return retval;

}



static int mv_ehci_remove(struct platform_device *pdev)

{

	struct ehci_hcd_mv *ehci_mv = platform_get_drvdata(pdev);

	struct usb_hcd *hcd = ehci_mv->hcd;

	int clk_i;



	if (hcd->rh_registered)

		usb_remove_hcd(hcd);



	if (ehci_mv->otg) {

		otg_set_host(ehci_mv->otg, NULL);

		otg_put_transceiver(ehci_mv->otg);

	}



	if (ehci_mv->mode == MV_USB_MODE_HOST) {

		if (ehci_mv->pdata->set_vbus)

			ehci_mv->pdata->set_vbus(0);



		mv_ehci_disable(ehci_mv);

	}



	iounmap(ehci_mv->cap_regs);

	iounmap(ehci_mv->phy_regs);



	for (clk_i = 0; clk_i < ehci_mv->clknum; clk_i++)

		clk_put(ehci_mv->clk[clk_i]);



	platform_set_drvdata(pdev, NULL);



	kfree(ehci_mv);

	usb_put_hcd(hcd);



	return 0;

}



MODULE_ALIAS("mv-ehci");



static const struct platform_device_id ehci_id_table[] = {

	{"pxa-u2oehci", PXA_U2OEHCI},

	{"pxa-sph", PXA_SPH},

	{"mmp3-hsic", MMP3_HSIC},

	{"mmp3-fsic", MMP3_FSIC},

	{},

};



static void mv_ehci_shutdown(struct platform_device *pdev)

{

	struct ehci_hcd_mv *ehci_mv = platform_get_drvdata(pdev);

	struct usb_hcd *hcd = ehci_mv->hcd;



	if (!hcd->rh_registered)

		return;



	if (hcd->driver->shutdown)

		hcd->driver->shutdown(hcd);

}



static struct platform_driver ehci_mv_driver = {

	.probe = mv_ehci_probe,

	.remove = mv_ehci_remove,

	.shutdown = mv_ehci_shutdown,

	.driver = {

		   .name = "mv-ehci",

		   .bus = &platform_bus_type,

		   },

	.id_table = ehci_id_table,

};

include/linux/platform_data/mv_usb.h

+1 −0
Original line number Diff line number Diff line
@@ -50,6 +50,7 @@ struct mv_usb_platform_data { 
	int	(*phy_init)(void __iomem *regbase);

	void	(*phy_deinit)(void __iomem *regbase);

	int	(*set_vbus)(unsigned int vbus);

	int     (*private_init)(void __iomem *opregs, void __iomem *phyregs);

};



#ifndef CONFIG_HAVE_CLK