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236 lines
5.2 KiB
236 lines
5.2 KiB
// SPDX-License-Identifier: GPL-1.0+ |
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/* |
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* OHCI HCD (Host Controller Driver) for USB. |
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* |
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* (C) Copyright 1999 Roman Weissgaerber <[email protected]> |
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* (C) Copyright 2000-2002 David Brownell <[email protected]> |
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* (C) Copyright 2002 Hewlett-Packard Company |
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* (C) Copyright 2006 Sylvain Munaut <[email protected]> |
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* |
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* Bus glue for OHCI HC on the of_platform bus |
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* |
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* Modified for of_platform bus from ohci-sa1111.c |
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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/signal.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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#include <asm/prom.h> |
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static int |
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ohci_ppc_of_start(struct usb_hcd *hcd) |
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{ |
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struct ohci_hcd *ohci = hcd_to_ohci(hcd); |
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int ret; |
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if ((ret = ohci_init(ohci)) < 0) |
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return ret; |
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if ((ret = ohci_run(ohci)) < 0) { |
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dev_err(hcd->self.controller, "can't start %s\n", |
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hcd->self.bus_name); |
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ohci_stop(hcd); |
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return ret; |
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} |
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return 0; |
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} |
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static const struct hc_driver ohci_ppc_of_hc_driver = { |
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.description = hcd_name, |
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.product_desc = "OF OHCI", |
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.hcd_priv_size = sizeof(struct ohci_hcd), |
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/* |
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* generic hardware linkage |
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*/ |
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.irq = ohci_irq, |
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.flags = HCD_USB11 | HCD_DMA | HCD_MEMORY, |
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/* |
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* basic lifecycle operations |
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*/ |
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.start = ohci_ppc_of_start, |
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.stop = ohci_stop, |
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.shutdown = ohci_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 = ohci_urb_enqueue, |
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.urb_dequeue = ohci_urb_dequeue, |
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.endpoint_disable = ohci_endpoint_disable, |
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/* |
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* scheduling support |
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*/ |
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.get_frame_number = ohci_get_frame, |
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/* |
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* root hub support |
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*/ |
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.hub_status_data = ohci_hub_status_data, |
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.hub_control = ohci_hub_control, |
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#ifdef CONFIG_PM |
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.bus_suspend = ohci_bus_suspend, |
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.bus_resume = ohci_bus_resume, |
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#endif |
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.start_port_reset = ohci_start_port_reset, |
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}; |
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static int ohci_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 ohci_hcd *ohci; |
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struct resource res; |
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int irq; |
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int rv; |
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int is_bigendian; |
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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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is_bigendian = |
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of_device_is_compatible(dn, "ohci-bigendian") || |
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of_device_is_compatible(dn, "ohci-be"); |
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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(&ohci_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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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_rmr; |
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} |
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irq = irq_of_parse_and_map(dn, 0); |
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if (irq == NO_IRQ) { |
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dev_err(&op->dev, "%s: irq_of_parse_and_map failed\n", |
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__FILE__); |
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rv = -EBUSY; |
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goto err_rmr; |
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} |
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ohci = hcd_to_ohci(hcd); |
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if (is_bigendian) { |
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ohci->flags |= OHCI_QUIRK_BE_MMIO | OHCI_QUIRK_BE_DESC; |
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if (of_device_is_compatible(dn, "fsl,mpc5200-ohci")) |
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ohci->flags |= OHCI_QUIRK_FRAME_NO; |
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if (of_device_is_compatible(dn, "mpc5200-ohci")) |
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ohci->flags |= OHCI_QUIRK_FRAME_NO; |
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} |
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ohci_hcd_init(ohci); |
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rv = usb_add_hcd(hcd, irq, 0); |
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if (rv == 0) { |
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device_wakeup_enable(hcd->self.controller); |
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return 0; |
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} |
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/* by now, 440epx is known to show usb_23 erratum */ |
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np = of_find_compatible_node(NULL, NULL, "ibm,usb-ehci-440epx"); |
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/* Work around - At this point ohci_run has executed, the |
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* controller is running, everything, the root ports, etc., is |
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* set up. If the ehci driver is loaded, put the ohci core in |
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* the suspended state. The ehci driver will bring it out of |
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* suspended state when / if a non-high speed USB device is |
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* attached to the USB Host port. If the ehci driver is not |
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* loaded, do nothing. request_mem_region is used to test if |
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* the ehci driver is loaded. |
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*/ |
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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, 0x4, hcd_name)) { |
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writel_be((readl_be(&ohci->regs->control) | |
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OHCI_USB_SUSPEND), &ohci->regs->control); |
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(void) readl_be(&ohci->regs->control); |
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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: cannot get ehci offset from fdt\n", __FILE__); |
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} |
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irq_dispose_mapping(irq); |
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err_rmr: |
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usb_put_hcd(hcd); |
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return rv; |
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} |
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static int ohci_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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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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usb_put_hcd(hcd); |
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return 0; |
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} |
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static const struct of_device_id ohci_hcd_ppc_of_match[] = { |
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#ifdef CONFIG_USB_OHCI_HCD_PPC_OF_BE |
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{ |
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.name = "usb", |
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.compatible = "ohci-bigendian", |
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}, |
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{ |
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.name = "usb", |
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.compatible = "ohci-be", |
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}, |
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#endif |
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#ifdef CONFIG_USB_OHCI_HCD_PPC_OF_LE |
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{ |
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.name = "usb", |
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.compatible = "ohci-littledian", |
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}, |
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{ |
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.name = "usb", |
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.compatible = "ohci-le", |
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}, |
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#endif |
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{}, |
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}; |
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MODULE_DEVICE_TABLE(of, ohci_hcd_ppc_of_match); |
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#if !defined(CONFIG_USB_OHCI_HCD_PPC_OF_BE) && \ |
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!defined(CONFIG_USB_OHCI_HCD_PPC_OF_LE) |
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#error "No endianness selected for ppc-of-ohci" |
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#endif |
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static struct platform_driver ohci_hcd_ppc_of_driver = { |
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.probe = ohci_hcd_ppc_of_probe, |
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.remove = ohci_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-ohci", |
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.of_match_table = ohci_hcd_ppc_of_match, |
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}, |
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}; |
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