USB: UHCI: Add support for GRLIB GRUSBHC controller (3db7739c) · Commits · 戴 / test

drivers/usb/host/Kconfig

+4 −2

Original line number	Diff line number	Diff line
		@@ -396,7 +396,7 @@ config USB_OHCI_LITTLE_ENDIAN

		config USB_UHCI_HCD
		tristate "UHCI HCD (most Intel and VIA) support"
		depends on USB && PCI
		depends on USB && (PCI \|\| SPARC_LEON)
		---help---
		The Universal Host Controller Interface is a standard by Intel for
		accessing the USB hardware in the PC (which is also called the USB
		@@ -405,7 +405,8 @@ config USB_UHCI_HCD
		with Intel PCI chipsets (like intel 430TX, 440FX, 440LX, 440BX,
		i810, i820) conform to this standard. Also all VIA PCI chipsets
		(like VIA VP2, VP3, MVP3, Apollo Pro, Apollo Pro II or Apollo Pro
		133). If unsure, say Y.
		133) and LEON/GRLIB SoCs with the GRUSBHC controller.
		If unsure, say Y.

		To compile this driver as a module, choose M here: the
		module will be called uhci-hcd.
		@@ -413,6 +414,7 @@ config USB_UHCI_HCD
		config USB_UHCI_SUPPORT_NON_PCI_HC
		bool
		depends on USB_UHCI_HCD
		default y if SPARC_LEON

		config USB_FHCI_HCD
		tristate "Freescale QE USB Host Controller support"

drivers/usb/host/uhci-grlib.c

0 → 100644

+194 −0

Original line number	Diff line number	Diff line
		/*
		* UHCI HCD (Host Controller Driver) for GRLIB GRUSBHC
		*
		* Copyright (c) 2011 Jan Andersson <jan@gaisler.com>
		*
		* This file is based on UHCI PCI HCD:
		* (C) Copyright 1999 Linus Torvalds
		* (C) Copyright 1999-2002 Johannes Erdfelt, johannes@erdfelt.com
		* (C) Copyright 1999 Randy Dunlap
		* (C) Copyright 1999 Georg Acher, acher@in.tum.de
		* (C) Copyright 1999 Deti Fliegl, deti@fliegl.de
		* (C) Copyright 1999 Thomas Sailer, sailer@ife.ee.ethz.ch
		* (C) Copyright 1999 Roman Weissgaerber, weissg@vienna.at
		* (C) Copyright 2000 Yggdrasil Computing, Inc. (port of new PCI interface
		* support from usb-ohci.c by Adam Richter, adam@yggdrasil.com).
		* (C) Copyright 1999 Gregory P. Smith (from usb-ohci.c)
		* (C) Copyright 2004-2007 Alan Stern, stern@rowland.harvard.edu
		*/

		#include <linux/of_irq.h>
		#include <linux/of_address.h>
		#include <linux/of_platform.h>

		static int uhci_grlib_init(struct usb_hcd *hcd)
		{
		struct uhci_hcd *uhci = hcd_to_uhci(hcd);

		uhci->rh_numports = uhci_count_ports(hcd);

		/* Set up pointers to to generic functions */
		uhci->reset_hc = uhci_generic_reset_hc;
		uhci->check_and_reset_hc = uhci_generic_check_and_reset_hc;
		/* No special actions need to be taken for the functions below */
		uhci->configure_hc = NULL;
		uhci->resume_detect_interrupts_are_broken = NULL;
		uhci->global_suspend_mode_is_broken = NULL;

		/* Reset if the controller isn't already safely quiescent. */
		check_and_reset_hc(uhci);
		return 0;
		}

		static const struct hc_driver uhci_grlib_hc_driver = {
		.description = hcd_name,
		.product_desc = "GRLIB GRUSBHC UHCI Host Controller",
		.hcd_priv_size = sizeof(struct uhci_hcd),

		/* Generic hardware linkage */
		.irq = uhci_irq,
		.flags = HCD_MEMORY \| HCD_USB11,

		/* Basic lifecycle operations */
		.reset = uhci_grlib_init,
		.start = uhci_start,
		#ifdef CONFIG_PM
		.pci_suspend = NULL,
		.pci_resume = NULL,
		.bus_suspend = uhci_rh_suspend,
		.bus_resume = uhci_rh_resume,
		#endif
		.stop = uhci_stop,

		.urb_enqueue = uhci_urb_enqueue,
		.urb_dequeue = uhci_urb_dequeue,

		.endpoint_disable = uhci_hcd_endpoint_disable,
		.get_frame_number = uhci_hcd_get_frame_number,

		.hub_status_data = uhci_hub_status_data,
		.hub_control = uhci_hub_control,
		};


		static int __devinit uhci_hcd_grlib_probe(struct platform_device *op)
		{
		struct device_node *dn = op->dev.of_node;
		struct usb_hcd *hcd;
		struct uhci_hcd *uhci = NULL;
		struct resource res;
		int irq;
		int rv;

		if (usb_disabled())
		return -ENODEV;

		dev_dbg(&op->dev, "initializing GRUSBHC UHCI USB Controller\n");

		rv = of_address_to_resource(dn, 0, &res);
		if (rv)
		return rv;

		/* usb_create_hcd requires dma_mask != NULL */
		op->dev.dma_mask = &op->dev.coherent_dma_mask;
		hcd = usb_create_hcd(&uhci_grlib_hc_driver, &op->dev,
		"GRUSBHC UHCI USB");
		if (!hcd)
		return -ENOMEM;

		hcd->rsrc_start = res.start;
		hcd->rsrc_len = res.end - res.start + 1;

		if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
		printk(KERN_ERR "%s: request_mem_region failed\n", __FILE__);
		rv = -EBUSY;
		goto err_rmr;
		}

		irq = irq_of_parse_and_map(dn, 0);
		if (irq == NO_IRQ) {
		printk(KERN_ERR "%s: irq_of_parse_and_map failed\n", __FILE__);
		rv = -EBUSY;
		goto err_irq;
		}

		hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
		if (!hcd->regs) {
		printk(KERN_ERR "%s: ioremap failed\n", __FILE__);
		rv = -ENOMEM;
		goto err_ioremap;
		}

		uhci = hcd_to_uhci(hcd);

		uhci->regs = hcd->regs;

		rv = usb_add_hcd(hcd, irq, 0);
		if (rv)
		goto err_uhci;

		return 0;

		err_uhci:
		iounmap(hcd->regs);
		err_ioremap:
		irq_dispose_mapping(irq);
		err_irq:
		release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
		err_rmr:
		usb_put_hcd(hcd);

		return rv;
		}

		static int uhci_hcd_grlib_remove(struct platform_device *op)
		{
		struct usb_hcd *hcd = dev_get_drvdata(&op->dev);

		dev_set_drvdata(&op->dev, NULL);

		dev_dbg(&op->dev, "stopping GRLIB GRUSBHC UHCI USB Controller\n");

		usb_remove_hcd(hcd);

		iounmap(hcd->regs);
		irq_dispose_mapping(hcd->irq);
		release_mem_region(hcd->rsrc_start, hcd->rsrc_len);

		usb_put_hcd(hcd);

		return 0;
		}

		/* Make sure the controller is quiescent and that we're not using it
		* any more. This is mainly for the benefit of programs which, like kexec,
		* expect the hardware to be idle: not doing DMA or generating IRQs.
		*
		* This routine may be called in a damaged or failing kernel. Hence we
		* do not acquire the spinlock before shutting down the controller.
		*/
		static void uhci_hcd_grlib_shutdown(struct platform_device *op)
		{
		struct usb_hcd *hcd = dev_get_drvdata(&op->dev);

		uhci_hc_died(hcd_to_uhci(hcd));
		}

		static const struct of_device_id uhci_hcd_grlib_of_match[] = {
		{ .name = "GAISLER_UHCI", },
		{ .name = "01_027", },
		{},
		};
		MODULE_DEVICE_TABLE(of, uhci_hcd_grlib_of_match);


		static struct platform_driver uhci_grlib_driver = {
		.probe = uhci_hcd_grlib_probe,
		.remove = uhci_hcd_grlib_remove,
		.shutdown = uhci_hcd_grlib_shutdown,
		.driver = {
		.name = "grlib-uhci",
		.owner = THIS_MODULE,
		.of_match_table = uhci_hcd_grlib_of_match,
		},
		};

drivers/usb/host/uhci-hcd.c

+36 −5

Original line number	Diff line number	Diff line
		@@ -831,7 +831,19 @@ static int uhci_count_ports(struct usb_hcd *hcd)

		static const char hcd_name[] = "uhci_hcd";

		#ifdef CONFIG_PCI
		#include "uhci-pci.c"
		#define PCI_DRIVER uhci_pci_driver
		#endif

		#ifdef CONFIG_SPARC_LEON
		#include "uhci-grlib.c"
		#define PLATFORM_DRIVER uhci_grlib_driver
		#endif

		#if !defined(PCI_DRIVER) && !defined(PLATFORM_DRIVER)
		#error "missing bus glue for uhci-hcd"
		#endif

		static int __init uhci_hcd_init(void)
		{
		@@ -858,13 +870,27 @@ static int __init uhci_hcd_init(void)
		if (!uhci_up_cachep)
		goto up_failed;

		retval = pci_register_driver(&uhci_pci_driver);
		if (retval)
		goto init_failed;
		#ifdef PLATFORM_DRIVER
		retval = platform_driver_register(&PLATFORM_DRIVER);
		if (retval < 0)
		goto clean0;
		#endif

		#ifdef PCI_DRIVER
		retval = pci_register_driver(&PCI_DRIVER);
		if (retval < 0)
		goto clean1;
		#endif

		return 0;

		init_failed:
		#ifdef PCI_DRIVER
		clean1:
		#endif
		#ifdef PLATFORM_DRIVER
		platform_driver_unregister(&PLATFORM_DRIVER);
		clean0:
		#endif
		kmem_cache_destroy(uhci_up_cachep);

		up_failed:
		@@ -881,7 +907,12 @@ errbuf_failed:

		static void __exit uhci_hcd_cleanup(void)
		{
		pci_unregister_driver(&uhci_pci_driver);
		#ifdef PLATFORM_DRIVER
		platform_driver_unregister(&PLATFORM_DRIVER);
		#endif
		#ifdef PCI_DRIVER
		pci_unregister_driver(&PCI_DRIVER);
		#endif
		kmem_cache_destroy(uhci_up_cachep);
		debugfs_remove(uhci_debugfs_root);
		kfree(errbuf);

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