/* * Driver for Aeroflex Gaisler GRLIB GRUSBHC EHCI host controller * * GRUSBHC is typically found on LEON/GRLIB SoCs * * (c) Jan Andersson * * Based on ehci-ppc-of.c which is: * (c) Valentine Barshak * and in turn based on "ehci-ppc-soc.c" by Stefan Roese * and "ohci-ppc-of.c" by Sylvain Munaut * * 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. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software Foundation, * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include #include #include #include #include #define GRUSBHC_HCIVERSION 0x0100 /* Known value of cap. reg. HCIVERSION */ static const struct hc_driver ehci_grlib_hc_driver = { .description = hcd_name, .product_desc = "GRLIB GRUSBHC EHCI", .hcd_priv_size = sizeof(struct ehci_hcd), /* * generic hardware linkage */ .irq = ehci_irq, .flags = HCD_MEMORY | HCD_USB2 | HCD_BH, /* * basic lifecycle operations */ .reset = ehci_setup, .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, /* * scheduling support */ .get_frame_number = ehci_get_frame, /* * root hub support */ .hub_status_data = ehci_hub_status_data, .hub_control = ehci_hub_control, #ifdef CONFIG_PM .bus_suspend = ehci_bus_suspend, .bus_resume = ehci_bus_resume, #endif .relinquish_port = ehci_relinquish_port, .port_handed_over = ehci_port_handed_over, .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, }; static int ehci_hcd_grlib_probe(struct platform_device *op) { struct device_node *dn = op->dev.of_node; struct usb_hcd *hcd; struct ehci_hcd *ehci = NULL; struct resource res; u32 hc_capbase; int irq; int rv; if (usb_disabled()) return -ENODEV; dev_dbg(&op->dev, "initializing GRUSBHC EHCI 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(&ehci_grlib_hc_driver, &op->dev, "GRUSBHC EHCI USB"); if (!hcd) return -ENOMEM; hcd->rsrc_start = res.start; hcd->rsrc_len = resource_size(&res); irq = irq_of_parse_and_map(dn, 0); if (irq == NO_IRQ) { dev_err(&op->dev, "%s: irq_of_parse_and_map failed\n", __FILE__); rv = -EBUSY; goto err_irq; } hcd->regs = devm_ioremap_resource(&op->dev, &res); if (IS_ERR(hcd->regs)) { rv = PTR_ERR(hcd->regs); goto err_ioremap; } ehci = hcd_to_ehci(hcd); ehci->caps = hcd->regs; /* determine endianness of this implementation */ hc_capbase = ehci_readl(ehci, &ehci->caps->hc_capbase); if (HC_VERSION(ehci, hc_capbase) != GRUSBHC_HCIVERSION) { ehci->big_endian_mmio = 1; ehci->big_endian_desc = 1; ehci->big_endian_capbase = 1; } rv = usb_add_hcd(hcd, irq, 0); if (rv) goto err_ioremap; device_wakeup_enable(hcd->self.controller); return 0; err_ioremap: irq_dispose_mapping(irq); err_irq: usb_put_hcd(hcd); return rv; } static int ehci_hcd_grlib_remove(struct platform_device *op) { struct usb_hcd *hcd = platform_get_drvdata(op); dev_dbg(&op->dev, "stopping GRLIB GRUSBHC EHCI USB Controller\n"); usb_remove_hcd(hcd); irq_dispose_mapping(hcd->irq); usb_put_hcd(hcd); return 0; } static const struct of_device_id ehci_hcd_grlib_of_match[] = { { .name = "GAISLER_EHCI", }, { .name = "01_026", }, {}, }; MODULE_DEVICE_TABLE(of, ehci_hcd_grlib_of_match); static struct platform_driver ehci_grlib_driver = { .probe = ehci_hcd_grlib_probe, .remove = ehci_hcd_grlib_remove, .shutdown = usb_hcd_platform_shutdown, .driver = { .name = "grlib-ehci", .of_match_table = ehci_hcd_grlib_of_match, }, }; option value='1'>ignoremode:
authorLinus Torvalds <torvalds@linux-foundation.org>2017-01-18 11:13:41 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2017-01-18 11:13:41 -0800
commitca92e6c7e6329029d7188487a5c32e86ef471977 (patch)
tree704fb5c2ca533cdb569826522eed0dbbcf31f316 /include/net/busy_poll.h
parent0b75f821ec8be459dd4dec77be39595d989d77ac (diff)
parent4205e4786d0b9fc3b4fec7b1910cf645a0468307 (diff)
Merge branch 'smp-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull SMP hotplug update from Thomas Gleixner: "This contains a trivial typo fix and an extension to the core code for dynamically allocating states in the prepare stage. The extension is necessary right now because we need a proper way to unbreak LTTNG, which iscurrently non functional due to the removal of the notifiers. Surely it's out of tree, but it's widely used by distros. The simple solution would have been to reserve a state for LTTNG, but I'm not fond about unused crap in the kernel and the dynamic range, which we admittedly should have done right away, allows us to remove quite some of the hardcoded states, i.e. those which have no ordering requirements. So doing the right thing now is better than having an smaller intermediate solution which needs to be reworked anyway" * 'smp-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: cpu/hotplug: Provide dynamic range for prepare stage perf/x86/amd/ibs: Fix typo after cleanup state names in cpu/hotplug
Diffstat (limited to 'include/net/busy_poll.h')