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Commit 3eb0c5f4 authored by Ben Dooks's avatar Ben Dooks Committed by Linus Torvalds
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[PATCH] USB: add S3C24XX USB Host driver support 



USB (OHCI) Host driver for S3C2410/S3C2440 based systems

Signed-off-by: default avatarBen Dooks <ben-linux@fluff.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent f2908097

drivers/usb/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -20,6 +20,7 @@ config USB_ARCH_HAS_OHCI 
	default y if SA1111

	default y if ARCH_OMAP

	default y if ARCH_LH7A404

	default y if ARCH_S3C2410

	default y if PXA27x

	# PPC:

	default y if STB03xxx

drivers/usb/host/ohci-hcd.c

+5 −0
Original line number Diff line number Diff line
@@ -887,6 +887,10 @@ MODULE_LICENSE ("GPL"); 
#include "ohci-sa1111.c"

#endif



#ifdef CONFIG_ARCH_S3C2410

#include "ohci-s3c2410.c"

#endif



#ifdef CONFIG_ARCH_OMAP

#include "ohci-omap.c"

#endif
@@ -909,6 +913,7 @@ MODULE_LICENSE ("GPL"); 


#if !(defined(CONFIG_PCI) \

      || defined(CONFIG_SA1111) \

      || defined(CONFIG_ARCH_S3C2410) \

      || defined(CONFIG_ARCH_OMAP) \

      || defined (CONFIG_ARCH_LH7A404) \

      || defined (CONFIG_PXA27x) \

drivers/usb/host/ohci-s3c2410.c

0 → 100644
+496 −0
Original line number Diff line number Diff line 
/*

 * OHCI HCD (Host Controller Driver) for USB.

 *

 * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>

 * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>

 * (C) Copyright 2002 Hewlett-Packard Company

 *

 * USB Bus Glue for Samsung S3C2410

 *

 * Written by Christopher Hoover <ch@hpl.hp.com>

 * Based on fragments of previous driver by Rusell King et al.

 *

 * Modified for S3C2410 from ohci-sa1111.c, ohci-omap.c and ohci-lh7a40.c

 *	by Ben Dooks, <ben@simtec.co.uk>

 *	Copyright (C) 2004 Simtec Electronics

 *

 * Thanks to basprog@mail.ru for updates to newer kernels

 *

 * This file is licenced under the GPL.

*/



#include <asm/hardware.h>

#include <asm/mach-types.h>

#include <asm/hardware/clock.h>

#include <asm/arch/usb-control.h>



#define valid_port(idx) ((idx) == 1 || (idx) == 2)



/* clock device associated with the hcd */



static struct clk *clk;



/* forward definitions */



static void s3c2410_hcd_oc(struct s3c2410_hcd_info *info, int port_oc);



/* conversion functions */



struct s3c2410_hcd_info *to_s3c2410_info(struct usb_hcd *hcd)

{

	return hcd->self.controller->platform_data;

}



static void s3c2410_start_hc(struct platform_device *dev, struct usb_hcd *hcd)

{

	struct s3c2410_hcd_info *info = dev->dev.platform_data;



	dev_dbg(&dev->dev, "s3c2410_start_hc:\n");

	clk_enable(clk);



	if (info != NULL) {

		info->hcd	= hcd;

		info->report_oc = s3c2410_hcd_oc;



		if (info->enable_oc != NULL) {

			(info->enable_oc)(info, 1);

		}

	}

}



static void s3c2410_stop_hc(struct platform_device *dev)

{

	struct s3c2410_hcd_info *info = dev->dev.platform_data;



	dev_dbg(&dev->dev, "s3c2410_stop_hc:\n");



	if (info != NULL) {

		info->report_oc = NULL;

		info->hcd	= NULL;



		if (info->enable_oc != NULL) {

			(info->enable_oc)(info, 0);

		}

	}



	clk_disable(clk);

}



/* ohci_s3c2410_hub_status_data

 *

 * update the status data from the hub with anything that

 * has been detected by our system

*/



static int

ohci_s3c2410_hub_status_data (struct usb_hcd *hcd, char *buf)

{

	struct s3c2410_hcd_info *info = to_s3c2410_info(hcd);

	struct s3c2410_hcd_port *port;

	int orig;

	int portno;



	orig  = ohci_hub_status_data (hcd, buf);



	if (info == NULL)

		return orig;



	port = &info->port[0];



	/* mark any changed port as changed */



	for (portno = 0; portno < 2; port++, portno++) {

		if (port->oc_changed == 1 &&

		    port->flags & S3C_HCDFLG_USED) {

			dev_dbg(hcd->self.controller,

				"oc change on port %d\n", portno);



			if (orig < 1)

				orig = 1;



			buf[0] |= 1<<(portno+1);

		}

	}



	return orig;

}



/* s3c2410_usb_set_power

 *

 * configure the power on a port, by calling the platform device

 * routine registered with the platform device

*/



static void s3c2410_usb_set_power(struct s3c2410_hcd_info *info,

				  int port, int to)

{

	if (info == NULL)

		return;



	if (info->power_control != NULL) {

		info->port[port-1].power = to;

		(info->power_control)(port, to);

	}

}



/* ohci_s3c2410_hub_control

 *

 * look at control requests to the hub, and see if we need

 * to take any action or over-ride the results from the

 * request.

*/



static int ohci_s3c2410_hub_control (

	struct usb_hcd	*hcd,

	u16		typeReq,

	u16		wValue,

	u16		wIndex,

	char		*buf,

	u16		wLength)

{

	struct s3c2410_hcd_info *info = to_s3c2410_info(hcd);

	struct usb_hub_descriptor *desc;

	int ret = -EINVAL;

	u32 *data = (u32 *)buf;



	dev_dbg(hcd->self.controller,

		"s3c2410_hub_control(%p,0x%04x,0x%04x,0x%04x,%p,%04x)\n",

		hcd, typeReq, wValue, wIndex, buf, wLength);



	/* if we are only an humble host without any special capabilites

	 * process the request straight away and exit */



	if (info == NULL) {

		ret = ohci_hub_control(hcd, typeReq, wValue,

				       wIndex, buf, wLength);

		goto out;

	}



	/* check the request to see if it needs handling */



	switch (typeReq) {

	case SetPortFeature:

		if (wValue == USB_PORT_FEAT_POWER) {

			dev_dbg(hcd->self.controller, "SetPortFeat: POWER\n");

			s3c2410_usb_set_power(info, wIndex, 1);

			goto out;

		}

		break;



	case ClearPortFeature:

		switch (wValue) {

		case USB_PORT_FEAT_C_OVER_CURRENT:

			dev_dbg(hcd->self.controller,

				"ClearPortFeature: C_OVER_CURRENT\n");



			if (valid_port(wIndex)) {

				info->port[wIndex-1].oc_changed = 0;

				info->port[wIndex-1].oc_status = 0;

			}



			goto out;



		case USB_PORT_FEAT_OVER_CURRENT:

			dev_dbg(hcd->self.controller,

				"ClearPortFeature: OVER_CURRENT\n");



			if (valid_port(wIndex)) {

				info->port[wIndex-1].oc_status = 0;

			}



			goto out;



		case USB_PORT_FEAT_POWER:

			dev_dbg(hcd->self.controller,

				"ClearPortFeature: POWER\n");



			if (valid_port(wIndex)) {

				s3c2410_usb_set_power(info, wIndex, 0);

				return 0;

			}

		}

		break;

	}



	ret = ohci_hub_control(hcd, typeReq, wValue, wIndex, buf, wLength);

	if (ret)

		goto out;



	switch (typeReq) {

	case GetHubDescriptor:



		/* update the hub's descriptor */



		desc = (struct usb_hub_descriptor *)buf;



		if (info->power_control == NULL)

			return ret;



		dev_dbg(hcd->self.controller, "wHubCharacteristics 0x%04x\n",

			desc->wHubCharacteristics);



		/* remove the old configurations for power-switching, and

		 * over-current protection, and insert our new configuration

		 */



		desc->wHubCharacteristics &= ~cpu_to_le16(HUB_CHAR_LPSM);

		desc->wHubCharacteristics |= cpu_to_le16(0x0001);



		if (info->enable_oc) {

			desc->wHubCharacteristics &= ~cpu_to_le16(HUB_CHAR_OCPM);

			desc->wHubCharacteristics |=  cpu_to_le16(0x0008|0x0001);

		}



		dev_dbg(hcd->self.controller, "wHubCharacteristics after 0x%04x\n",

			desc->wHubCharacteristics);



		return ret;



	case GetPortStatus:

		/* check port status */



		dev_dbg(hcd->self.controller, "GetPortStatus(%d)\n", wIndex);



		if (valid_port(wIndex)) {

			if (info->port[wIndex-1].oc_changed) {

				*data |= cpu_to_le32(RH_PS_OCIC);

			}



			if (info->port[wIndex-1].oc_status) {

				*data |= cpu_to_le32(RH_PS_POCI);

			}

		}

	}



 out:

	return ret;

}



/* s3c2410_hcd_oc

 *

 * handle an over-current report

*/



static void s3c2410_hcd_oc(struct s3c2410_hcd_info *info, int port_oc)

{

	struct s3c2410_hcd_port *port;

	struct usb_hcd *hcd;

	unsigned long flags;

	int portno;



	if (info == NULL)

		return;



	port = &info->port[0];

	hcd = info->hcd;



	local_irq_save(flags);



	for (portno = 0; portno < 2; port++, portno++) {

		if (port_oc & (1<<portno) &&

		    port->flags & S3C_HCDFLG_USED) {

			port->oc_status = 1;

			port->oc_changed = 1;



			/* ok, once over-current is detected,

			   the port needs to be powered down */

			s3c2410_usb_set_power(info, portno+1, 0);

		}

	}



	local_irq_restore(flags);

}



/* may be called without controller electrically present */

/* may be called with controller, bus, and devices active */



/*

 * usb_hcd_s3c2410_remove - shutdown processing for HCD

 * @dev: USB Host Controller being removed

 * Context: !in_interrupt()

 *

 * Reverses the effect of usb_hcd_3c2410_probe(), first invoking

 * the HCD's stop() method.  It is always called from a thread

 * context, normally "rmmod", "apmd", or something similar.

 *

*/



void usb_hcd_s3c2410_remove (struct usb_hcd *hcd, struct platform_device *dev)

{

	usb_remove_hcd(hcd);

	s3c2410_stop_hc(dev);

	iounmap(hcd->regs);

	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);

	usb_put_hcd(hcd);

}



/**

 * usb_hcd_s3c2410_probe - initialize S3C2410-based HCDs

 * Context: !in_interrupt()

 *

 * Allocates basic resources for this USB host controller, and

 * then invokes the start() method for the HCD associated with it

 * through the hotplug entry's driver_data.

 *

 */

int usb_hcd_s3c2410_probe (const struct hc_driver *driver,

			   struct platform_device *dev)

{

	struct usb_hcd *hcd = NULL;

	int retval;



	s3c2410_usb_set_power(dev->dev.platform_data, 0, 1);

	s3c2410_usb_set_power(dev->dev.platform_data, 1, 1);



	hcd = usb_create_hcd(driver, &dev->dev, "s3c24xx");

	if (hcd == NULL)

		return -ENOMEM;



	hcd->rsrc_start = dev->resource[0].start;

	hcd->rsrc_len   = dev->resource[0].end - dev->resource[0].start + 1;



	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {

		dev_err(&dev->dev, "request_mem_region failed");

		retval = -EBUSY;

		goto err0;

	}



	clk = clk_get(NULL, "usb-host");

	if (IS_ERR(clk)) {

		dev_err(&dev->dev, "cannot get usb-host clock\n");

		retval = -ENOENT;

		goto err1;

	}



	clk_use(clk);

	s3c2410_start_hc(dev, hcd);



	hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);

	if (!hcd->regs) {

		dev_err(&dev->dev, "ioremap failed\n");

		retval = -ENOMEM;

		goto err2;

	}



	ohci_hcd_init(hcd_to_ohci(hcd));



	retval = usb_add_hcd(hcd, dev->resource[1].start, SA_INTERRUPT);

	if (retval != 0)

		goto err2;



	return 0;



 err2:

	s3c2410_stop_hc(dev);

	iounmap(hcd->regs);

	clk_unuse(clk);

	clk_put(clk);



 err1:

	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);



 err0:

	usb_put_hcd(hcd);

	return retval;

}



/*-------------------------------------------------------------------------*/



static int

ohci_s3c2410_start (struct usb_hcd *hcd)

{

	struct ohci_hcd	*ohci = hcd_to_ohci (hcd);

	int ret;



	if ((ret = ohci_init(ohci)) < 0)

		return ret;



	if ((ret = ohci_run (ohci)) < 0) {

		err ("can't start %s", hcd->self.bus_name);

		ohci_stop (hcd);

		return ret;

	}



	return 0;

}





static const struct hc_driver ohci_s3c2410_hc_driver = {

	.description =		hcd_name,

	.product_desc =		"S3C24XX OHCI",

	.hcd_priv_size =	sizeof(struct ohci_hcd),



	/*

	 * generic hardware linkage

	 */

	.irq =			ohci_irq,

	.flags =		HCD_USB11 | HCD_MEMORY,



	/*

	 * basic lifecycle operations

	 */

	.start =		ohci_s3c2410_start,

	.stop =			ohci_stop,



	/*

	 * managing i/o requests and associated device resources

	 */

	.urb_enqueue =		ohci_urb_enqueue,

	.urb_dequeue =		ohci_urb_dequeue,

	.endpoint_disable =	ohci_endpoint_disable,



	/*

	 * scheduling support

	 */

	.get_frame_number =	ohci_get_frame,



	/*

	 * root hub support

	 */

	.hub_status_data =	ohci_s3c2410_hub_status_data,

	.hub_control =		ohci_s3c2410_hub_control,



#if defined(CONFIG_USB_SUSPEND) && 0

	.hub_suspend =		ohci_hub_suspend,

	.hub_resume =		ohci_hub_resume,

#endif

};



/* device driver */



static int ohci_hcd_s3c2410_drv_probe(struct device *dev)

{

	struct platform_device *pdev = to_platform_device(dev);

	return usb_hcd_s3c2410_probe(&ohci_s3c2410_hc_driver, pdev);

}



static int ohci_hcd_s3c2410_drv_remove(struct device *dev)

{

	struct platform_device *pdev = to_platform_device(dev);

	struct usb_hcd *hcd = dev_get_drvdata(dev);



	usb_hcd_s3c2410_remove(hcd, pdev);

	return 0;

}



static struct device_driver ohci_hcd_s3c2410_driver = {

	.name		= "s3c2410-ohci",

	.bus		= &platform_bus_type,

	.probe		= ohci_hcd_s3c2410_drv_probe,

	.remove		= ohci_hcd_s3c2410_drv_remove,

	/*.suspend	= ohci_hcd_s3c2410_drv_suspend, */

	/*.resume	= ohci_hcd_s3c2410_drv_resume, */

};



static int __init ohci_hcd_s3c2410_init (void)

{

	return driver_register(&ohci_hcd_s3c2410_driver);

}



static void __exit ohci_hcd_s3c2410_cleanup (void)

{

	driver_unregister(&ohci_hcd_s3c2410_driver);

}



module_init (ohci_hcd_s3c2410_init);

module_exit (ohci_hcd_s3c2410_cleanup);