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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 | /* * 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/device.h> #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); /* * Probe to determine the endianness of the controller. * We know that bit 7 of the PORTSC1 register is always set * and bit 15 is always clear. If uhci_readw() yields a value * with bit 7 (0x80) turned on then the current little-endian * setting is correct. Otherwise we assume the value was * byte-swapped; hence the register interface and presumably * also the descriptors are big-endian. */ if (!(uhci_readw(uhci, USBPORTSC1) & 0x80)) { uhci->big_endian_mmio = 1; uhci->big_endian_desc = 1; } 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 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 = resource_size(&res); 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_usb; } hcd->regs = devm_ioremap_resource(&op->dev, &res); if (IS_ERR(hcd->regs)) { rv = PTR_ERR(hcd->regs); goto err_irq; } uhci = hcd_to_uhci(hcd); uhci->regs = hcd->regs; rv = usb_add_hcd(hcd, irq, 0); if (rv) goto err_irq; device_wakeup_enable(hcd->self.controller); return 0; err_irq: irq_dispose_mapping(irq); err_usb: usb_put_hcd(hcd); return rv; } static int uhci_hcd_grlib_remove(struct platform_device *op) { struct usb_hcd *hcd = platform_get_drvdata(op); dev_dbg(&op->dev, "stopping GRLIB GRUSBHC UHCI USB Controller\n"); usb_remove_hcd(hcd); irq_dispose_mapping(hcd->irq); 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 = platform_get_drvdata(op); 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", .of_match_table = uhci_hcd_grlib_of_match, }, }; |