forked from Minki/linux
10d0c9705e
usual for this cycle with lots of clean-up. - Cross arch clean-up and consolidation of early DT scanning code. - Clean-up and removal of arch prom.h headers. Makes arch specific prom.h optional on all but Sparc. - Addition of interrupts-extended property for devices connected to multiple interrupt controllers. - Refactoring of DT interrupt parsing code in preparation for deferred probe of interrupts. - ARM cpu and cpu topology bindings documentation. - Various DT vendor binding documentation updates. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAABAgAGBQJSgPQ4AAoJEMhvYp4jgsXif28H/1WkrXq5+lCFQZF8nbYdE2h0 R8PsfiJJmAl6/wFgQTsRel+ScMk2hiP08uTyqf2RLnB1v87gCF7MKVaLOdONfUDi huXbcQGWCmZv0tbBIklxJe3+X3FIJch4gnyUvPudD1m8a0R0LxWXH/NhdTSFyB20 PNjhN/IzoN40X1PSAhfB5ndWnoxXBoehV/IVHVDU42vkPVbVTyGAw5qJzHW8CLyN 2oGTOalOO4ffQ7dIkBEQfj0mrgGcODToPdDvUQyyGZjYK2FY2sGrjyquir6SDcNa Q4gwatHTu0ygXpyphjtQf5tc3ZCejJ/F0s3olOAS1ahKGfe01fehtwPRROQnCK8= =GCbY -----END PGP SIGNATURE----- Merge tag 'devicetree-for-3.13' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux Pull devicetree updates from Rob Herring: "DeviceTree updates for 3.13. This is a bit larger pull request than usual for this cycle with lots of clean-up. - Cross arch clean-up and consolidation of early DT scanning code. - Clean-up and removal of arch prom.h headers. Makes arch specific prom.h optional on all but Sparc. - Addition of interrupts-extended property for devices connected to multiple interrupt controllers. - Refactoring of DT interrupt parsing code in preparation for deferred probe of interrupts. - ARM cpu and cpu topology bindings documentation. - Various DT vendor binding documentation updates" * tag 'devicetree-for-3.13' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (82 commits) powerpc: add missing explicit OF includes for ppc dt/irq: add empty of_irq_count for !OF_IRQ dt: disable self-tests for !OF_IRQ of: irq: Fix interrupt-map entry matching MIPS: Netlogic: replace early_init_devtree() call of: Add Panasonic Corporation vendor prefix of: Add Chunghwa Picture Tubes Ltd. vendor prefix of: Add AU Optronics Corporation vendor prefix of/irq: Fix potential buffer overflow of/irq: Fix bug in interrupt parsing refactor. of: set dma_mask to point to coherent_dma_mask of: add vendor prefix for PHYTEC Messtechnik GmbH DT: sort vendor-prefixes.txt of: Add vendor prefix for Cadence of: Add empty for_each_available_child_of_node() macro definition arm/versatile: Fix versatile irq specifications. of/irq: create interrupts-extended property microblaze/pci: Drop PowerPC-ism from irq parsing of/irq: Create of_irq_parse_and_map_pci() to consolidate arch code. of/irq: Use irq_of_parse_and_map() ...
239 lines
5.1 KiB
C
239 lines
5.1 KiB
C
/*
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* EHCI HCD (Host Controller Driver) for USB.
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*
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* Bus Glue for PPC On-Chip EHCI driver on the of_platform bus
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* Tested on AMCC PPC 440EPx
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*
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* Valentine Barshak <vbarshak@ru.mvista.com>
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*
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* Based on "ehci-ppc-soc.c" by Stefan Roese <sr@denx.de>
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* and "ohci-ppc-of.c" by Sylvain Munaut <tnt@246tNt.com>
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*
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* This file is licenced under the GPL.
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*/
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#include <linux/err.h>
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#include <linux/signal.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#include <linux/of_irq.h>
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#include <linux/of_platform.h>
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static const struct hc_driver ehci_ppc_of_hc_driver = {
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.description = hcd_name,
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.product_desc = "OF EHCI",
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.hcd_priv_size = sizeof(struct ehci_hcd),
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/*
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* generic hardware linkage
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*/
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.irq = ehci_irq,
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.flags = HCD_MEMORY | HCD_USB2 | HCD_BH,
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/*
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* basic lifecycle operations
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*/
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.reset = ehci_setup,
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.start = ehci_run,
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.stop = ehci_stop,
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.shutdown = ehci_shutdown,
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/*
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* managing i/o requests and associated device resources
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*/
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.urb_enqueue = ehci_urb_enqueue,
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.urb_dequeue = ehci_urb_dequeue,
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.endpoint_disable = ehci_endpoint_disable,
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.endpoint_reset = ehci_endpoint_reset,
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/*
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* scheduling support
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*/
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.get_frame_number = ehci_get_frame,
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/*
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* root hub support
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*/
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.hub_status_data = ehci_hub_status_data,
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.hub_control = ehci_hub_control,
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#ifdef CONFIG_PM
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.bus_suspend = ehci_bus_suspend,
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.bus_resume = ehci_bus_resume,
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#endif
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.relinquish_port = ehci_relinquish_port,
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.port_handed_over = ehci_port_handed_over,
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.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
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};
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/*
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* 440EPx Errata USBH_3
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* Fix: Enable Break Memory Transfer (BMT) in INSNREG3
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*/
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#define PPC440EPX_EHCI0_INSREG_BMT (0x1 << 0)
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static int
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ppc44x_enable_bmt(struct device_node *dn)
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{
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__iomem u32 *insreg_virt;
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insreg_virt = of_iomap(dn, 1);
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if (!insreg_virt)
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return -EINVAL;
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out_be32(insreg_virt + 3, PPC440EPX_EHCI0_INSREG_BMT);
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iounmap(insreg_virt);
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return 0;
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}
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static int ehci_hcd_ppc_of_probe(struct platform_device *op)
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{
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struct device_node *dn = op->dev.of_node;
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struct usb_hcd *hcd;
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struct ehci_hcd *ehci = NULL;
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struct resource res;
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int irq;
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int rv;
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struct device_node *np;
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if (usb_disabled())
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return -ENODEV;
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dev_dbg(&op->dev, "initializing PPC-OF USB Controller\n");
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rv = of_address_to_resource(dn, 0, &res);
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if (rv)
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return rv;
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hcd = usb_create_hcd(&ehci_ppc_of_hc_driver, &op->dev, "PPC-OF USB");
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if (!hcd)
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return -ENOMEM;
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hcd->rsrc_start = res.start;
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hcd->rsrc_len = resource_size(&res);
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irq = irq_of_parse_and_map(dn, 0);
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if (irq == NO_IRQ) {
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printk(KERN_ERR "%s: irq_of_parse_and_map failed\n", __FILE__);
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rv = -EBUSY;
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goto err_irq;
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}
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hcd->regs = devm_ioremap_resource(&op->dev, &res);
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if (IS_ERR(hcd->regs)) {
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rv = PTR_ERR(hcd->regs);
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goto err_ioremap;
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}
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ehci = hcd_to_ehci(hcd);
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np = of_find_compatible_node(NULL, NULL, "ibm,usb-ohci-440epx");
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if (np != NULL) {
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/* claim we really affected by usb23 erratum */
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if (!of_address_to_resource(np, 0, &res))
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ehci->ohci_hcctrl_reg =
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devm_ioremap(&op->dev,
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res.start + OHCI_HCCTRL_OFFSET,
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OHCI_HCCTRL_LEN);
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else
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pr_debug("%s: no ohci offset in fdt\n", __FILE__);
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if (!ehci->ohci_hcctrl_reg) {
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pr_debug("%s: ioremap for ohci hcctrl failed\n", __FILE__);
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} else {
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ehci->has_amcc_usb23 = 1;
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}
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}
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if (of_get_property(dn, "big-endian", NULL)) {
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ehci->big_endian_mmio = 1;
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ehci->big_endian_desc = 1;
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}
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if (of_get_property(dn, "big-endian-regs", NULL))
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ehci->big_endian_mmio = 1;
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if (of_get_property(dn, "big-endian-desc", NULL))
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ehci->big_endian_desc = 1;
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ehci->caps = hcd->regs;
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if (of_device_is_compatible(dn, "ibm,usb-ehci-440epx")) {
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rv = ppc44x_enable_bmt(dn);
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ehci_dbg(ehci, "Break Memory Transfer (BMT) is %senabled!\n",
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rv ? "NOT ": "");
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}
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rv = usb_add_hcd(hcd, irq, 0);
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if (rv)
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goto err_ioremap;
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return 0;
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err_ioremap:
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irq_dispose_mapping(irq);
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err_irq:
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usb_put_hcd(hcd);
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return rv;
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}
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static int ehci_hcd_ppc_of_remove(struct platform_device *op)
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{
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struct usb_hcd *hcd = platform_get_drvdata(op);
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struct ehci_hcd *ehci = hcd_to_ehci(hcd);
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struct device_node *np;
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struct resource res;
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dev_dbg(&op->dev, "stopping PPC-OF USB Controller\n");
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usb_remove_hcd(hcd);
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irq_dispose_mapping(hcd->irq);
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/* use request_mem_region to test if the ohci driver is loaded. if so
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* ensure the ohci core is operational.
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*/
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if (ehci->has_amcc_usb23) {
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np = of_find_compatible_node(NULL, NULL, "ibm,usb-ohci-440epx");
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if (np != NULL) {
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if (!of_address_to_resource(np, 0, &res))
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if (!request_mem_region(res.start,
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0x4, hcd_name))
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set_ohci_hcfs(ehci, 1);
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else
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release_mem_region(res.start, 0x4);
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else
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pr_debug("%s: no ohci offset in fdt\n", __FILE__);
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of_node_put(np);
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}
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}
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usb_put_hcd(hcd);
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return 0;
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}
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static const struct of_device_id ehci_hcd_ppc_of_match[] = {
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{
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.compatible = "usb-ehci",
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},
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{},
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};
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MODULE_DEVICE_TABLE(of, ehci_hcd_ppc_of_match);
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static struct platform_driver ehci_hcd_ppc_of_driver = {
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.probe = ehci_hcd_ppc_of_probe,
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.remove = ehci_hcd_ppc_of_remove,
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.shutdown = usb_hcd_platform_shutdown,
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.driver = {
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.name = "ppc-of-ehci",
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.owner = THIS_MODULE,
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.of_match_table = ehci_hcd_ppc_of_match,
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},
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};
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