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USB: UHCI: Add support for GRLIB GRUSBHC controller
This patch adds support for the UHCI part of the GRLIB GRUSBHC controller found on some LEON/GRLIB SoCs. The UHCI HCD previously only supported controllers connected over PCI. This patch adds support for the first non-PCI UHCI HC. I have tried to replicate the solution used in ehci-hcd.c. Tested on GR-LEON4-ITX board (LEON4/GRLIB with GRUSBHC) and x86 with Intel UHCI HC. Signed-off-by: Jan Andersson <jan@gaisler.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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Jan Andersson
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Greg Kroah-Hartman
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May 7, 2011
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,194 @@ | ||
| /* | ||
| * 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); | ||
|
|
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| uhci->rh_numports = uhci_count_ports(hcd); | ||
|
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| /* 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; | ||
|
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| /* Reset if the controller isn't already safely quiescent. */ | ||
| check_and_reset_hc(uhci); | ||
| return 0; | ||
| } | ||
|
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| 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, | ||
|
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| /* 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, | ||
|
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| .urb_enqueue = uhci_urb_enqueue, | ||
| .urb_dequeue = uhci_urb_dequeue, | ||
|
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| .endpoint_disable = uhci_hcd_endpoint_disable, | ||
| .get_frame_number = uhci_hcd_get_frame_number, | ||
|
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| .hub_status_data = uhci_hub_status_data, | ||
| .hub_control = uhci_hub_control, | ||
| }; | ||
|
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|
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| 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; | ||
|
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||
| if (usb_disabled()) | ||
| return -ENODEV; | ||
|
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| dev_dbg(&op->dev, "initializing GRUSBHC UHCI USB Controller\n"); | ||
|
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| rv = of_address_to_resource(dn, 0, &res); | ||
| if (rv) | ||
| return rv; | ||
|
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| /* 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; | ||
|
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| hcd->rsrc_start = res.start; | ||
| hcd->rsrc_len = res.end - res.start + 1; | ||
|
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| 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; | ||
| } | ||
|
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| 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; | ||
| } | ||
|
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| 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; | ||
| } | ||
|
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| uhci = hcd_to_uhci(hcd); | ||
|
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| uhci->regs = hcd->regs; | ||
|
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| rv = usb_add_hcd(hcd, irq, 0); | ||
| if (rv) | ||
| goto err_uhci; | ||
|
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| return 0; | ||
|
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| 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); | ||
|
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| return rv; | ||
| } | ||
|
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| static int uhci_hcd_grlib_remove(struct platform_device *op) | ||
| { | ||
| struct usb_hcd *hcd = dev_get_drvdata(&op->dev); | ||
|
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| dev_set_drvdata(&op->dev, NULL); | ||
|
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| dev_dbg(&op->dev, "stopping GRLIB GRUSBHC UHCI USB Controller\n"); | ||
|
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| usb_remove_hcd(hcd); | ||
|
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| iounmap(hcd->regs); | ||
| irq_dispose_mapping(hcd->irq); | ||
| release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | ||
|
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| usb_put_hcd(hcd); | ||
|
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| return 0; | ||
| } | ||
|
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| /* 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); | ||
|
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| uhci_hc_died(hcd_to_uhci(hcd)); | ||
| } | ||
|
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| 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); | ||
|
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|
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| 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, | ||
| }, | ||
| }; |
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