1 /* 2 * xHCI host controller driver PCI Bus Glue. 3 * 4 * Copyright (C) 2008 Intel Corp. 5 * 6 * Author: Sarah Sharp 7 * Some code borrowed from the Linux EHCI driver. 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License version 2 as 11 * published by the Free Software Foundation. 12 * 13 * This program is distributed in the hope that it will be useful, but 14 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 15 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 16 * for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software Foundation, 20 * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 21 */ 22 23 #include <linux/pci.h> 24 25 #include "xhci.h" 26 27 static const char hcd_name[] = "xhci_hcd"; 28 29 /* called after powerup, by probe or system-pm "wakeup" */ 30 static int xhci_pci_reinit(struct xhci_hcd *xhci, struct pci_dev *pdev) 31 { 32 /* 33 * TODO: Implement finding debug ports later. 34 * TODO: see if there are any quirks that need to be added to handle 35 * new extended capabilities. 36 */ 37 38 /* PCI Memory-Write-Invalidate cycle support is optional (uncommon) */ 39 if (!pci_set_mwi(pdev)) 40 xhci_dbg(xhci, "MWI active\n"); 41 42 xhci_dbg(xhci, "Finished xhci_pci_reinit\n"); 43 return 0; 44 } 45 46 /* called during probe() after chip reset completes */ 47 static int xhci_pci_setup(struct usb_hcd *hcd) 48 { 49 struct xhci_hcd *xhci = hcd_to_xhci(hcd); 50 struct pci_dev *pdev = to_pci_dev(hcd->self.controller); 51 int retval; 52 53 xhci->cap_regs = hcd->regs; 54 xhci->op_regs = hcd->regs + 55 HC_LENGTH(xhci_readl(xhci, &xhci->cap_regs->hc_capbase)); 56 xhci->run_regs = hcd->regs + 57 (xhci_readl(xhci, &xhci->cap_regs->run_regs_off) & RTSOFF_MASK); 58 /* Cache read-only capability registers */ 59 xhci->hcs_params1 = xhci_readl(xhci, &xhci->cap_regs->hcs_params1); 60 xhci->hcs_params2 = xhci_readl(xhci, &xhci->cap_regs->hcs_params2); 61 xhci->hcs_params3 = xhci_readl(xhci, &xhci->cap_regs->hcs_params3); 62 xhci->hcc_params = xhci_readl(xhci, &xhci->cap_regs->hcc_params); 63 xhci_print_registers(xhci); 64 65 /* Make sure the HC is halted. */ 66 retval = xhci_halt(xhci); 67 if (retval) 68 return retval; 69 70 xhci_dbg(xhci, "Resetting HCD\n"); 71 /* Reset the internal HC memory state and registers. */ 72 retval = xhci_reset(xhci); 73 if (retval) 74 return retval; 75 xhci_dbg(xhci, "Reset complete\n"); 76 77 xhci_dbg(xhci, "Calling HCD init\n"); 78 /* Initialize HCD and host controller data structures. */ 79 retval = xhci_init(hcd); 80 if (retval) 81 return retval; 82 xhci_dbg(xhci, "Called HCD init\n"); 83 84 pci_read_config_byte(pdev, XHCI_SBRN_OFFSET, &xhci->sbrn); 85 xhci_dbg(xhci, "Got SBRN %u\n", (unsigned int) xhci->sbrn); 86 87 /* Find any debug ports */ 88 return xhci_pci_reinit(xhci, pdev); 89 } 90 91 static const struct hc_driver xhci_pci_hc_driver = { 92 .description = hcd_name, 93 .product_desc = "xHCI Host Controller", 94 .hcd_priv_size = sizeof(struct xhci_hcd), 95 96 /* 97 * generic hardware linkage 98 */ 99 .irq = xhci_irq, 100 .flags = HCD_MEMORY | HCD_USB3, 101 102 /* 103 * basic lifecycle operations 104 */ 105 .reset = xhci_pci_setup, 106 .start = xhci_run, 107 /* suspend and resume implemented later */ 108 .stop = xhci_stop, 109 .shutdown = xhci_shutdown, 110 111 /* 112 * managing i/o requests and associated device resources 113 */ 114 .urb_enqueue = xhci_urb_enqueue, 115 .urb_dequeue = xhci_urb_dequeue, 116 .alloc_dev = xhci_alloc_dev, 117 .free_dev = xhci_free_dev, 118 .add_endpoint = xhci_add_endpoint, 119 .drop_endpoint = xhci_drop_endpoint, 120 .endpoint_reset = xhci_endpoint_reset, 121 .check_bandwidth = xhci_check_bandwidth, 122 .reset_bandwidth = xhci_reset_bandwidth, 123 .address_device = xhci_address_device, 124 125 /* 126 * scheduling support 127 */ 128 .get_frame_number = xhci_get_frame, 129 130 /* Root hub support */ 131 .hub_control = xhci_hub_control, 132 .hub_status_data = xhci_hub_status_data, 133 }; 134 135 /*-------------------------------------------------------------------------*/ 136 137 /* PCI driver selection metadata; PCI hotplugging uses this */ 138 static const struct pci_device_id pci_ids[] = { { 139 /* handle any USB 3.0 xHCI controller */ 140 PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_XHCI, ~0), 141 .driver_data = (unsigned long) &xhci_pci_hc_driver, 142 }, 143 { /* end: all zeroes */ } 144 }; 145 MODULE_DEVICE_TABLE(pci, pci_ids); 146 147 /* pci driver glue; this is a "new style" PCI driver module */ 148 static struct pci_driver xhci_pci_driver = { 149 .name = (char *) hcd_name, 150 .id_table = pci_ids, 151 152 .probe = usb_hcd_pci_probe, 153 .remove = usb_hcd_pci_remove, 154 /* suspend and resume implemented later */ 155 156 .shutdown = usb_hcd_pci_shutdown, 157 }; 158 159 int xhci_register_pci() 160 { 161 return pci_register_driver(&xhci_pci_driver); 162 } 163 164 void xhci_unregister_pci() 165 { 166 pci_unregister_driver(&xhci_pci_driver); 167 } 168