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 /* Device for a quirk */ 28 #define PCI_VENDOR_ID_FRESCO_LOGIC 0x1b73 29 #define PCI_DEVICE_ID_FRESCO_LOGIC_PDK 0x1000 30 31 static const char hcd_name[] = "xhci_hcd"; 32 33 /* called after powerup, by probe or system-pm "wakeup" */ 34 static int xhci_pci_reinit(struct xhci_hcd *xhci, struct pci_dev *pdev) 35 { 36 /* 37 * TODO: Implement finding debug ports later. 38 * TODO: see if there are any quirks that need to be added to handle 39 * new extended capabilities. 40 */ 41 42 /* PCI Memory-Write-Invalidate cycle support is optional (uncommon) */ 43 if (!pci_set_mwi(pdev)) 44 xhci_dbg(xhci, "MWI active\n"); 45 46 xhci_dbg(xhci, "Finished xhci_pci_reinit\n"); 47 return 0; 48 } 49 50 /* called during probe() after chip reset completes */ 51 static int xhci_pci_setup(struct usb_hcd *hcd) 52 { 53 struct xhci_hcd *xhci = hcd_to_xhci(hcd); 54 struct pci_dev *pdev = to_pci_dev(hcd->self.controller); 55 int retval; 56 57 hcd->self.sg_tablesize = TRBS_PER_SEGMENT - 1; 58 59 xhci->cap_regs = hcd->regs; 60 xhci->op_regs = hcd->regs + 61 HC_LENGTH(xhci_readl(xhci, &xhci->cap_regs->hc_capbase)); 62 xhci->run_regs = hcd->regs + 63 (xhci_readl(xhci, &xhci->cap_regs->run_regs_off) & RTSOFF_MASK); 64 /* Cache read-only capability registers */ 65 xhci->hcs_params1 = xhci_readl(xhci, &xhci->cap_regs->hcs_params1); 66 xhci->hcs_params2 = xhci_readl(xhci, &xhci->cap_regs->hcs_params2); 67 xhci->hcs_params3 = xhci_readl(xhci, &xhci->cap_regs->hcs_params3); 68 xhci->hcc_params = xhci_readl(xhci, &xhci->cap_regs->hc_capbase); 69 xhci->hci_version = HC_VERSION(xhci->hcc_params); 70 xhci->hcc_params = xhci_readl(xhci, &xhci->cap_regs->hcc_params); 71 xhci_print_registers(xhci); 72 73 /* Look for vendor-specific quirks */ 74 if (pdev->vendor == PCI_VENDOR_ID_FRESCO_LOGIC && 75 pdev->device == PCI_DEVICE_ID_FRESCO_LOGIC_PDK && 76 pdev->revision == 0x0) { 77 xhci->quirks |= XHCI_RESET_EP_QUIRK; 78 xhci_dbg(xhci, "QUIRK: Fresco Logic xHC needs configure" 79 " endpoint cmd after reset endpoint\n"); 80 } 81 82 /* Make sure the HC is halted. */ 83 retval = xhci_halt(xhci); 84 if (retval) 85 return retval; 86 87 xhci_dbg(xhci, "Resetting HCD\n"); 88 /* Reset the internal HC memory state and registers. */ 89 retval = xhci_reset(xhci); 90 if (retval) 91 return retval; 92 xhci_dbg(xhci, "Reset complete\n"); 93 94 xhci_dbg(xhci, "Calling HCD init\n"); 95 /* Initialize HCD and host controller data structures. */ 96 retval = xhci_init(hcd); 97 if (retval) 98 return retval; 99 xhci_dbg(xhci, "Called HCD init\n"); 100 101 pci_read_config_byte(pdev, XHCI_SBRN_OFFSET, &xhci->sbrn); 102 xhci_dbg(xhci, "Got SBRN %u\n", (unsigned int) xhci->sbrn); 103 104 /* Find any debug ports */ 105 return xhci_pci_reinit(xhci, pdev); 106 } 107 108 static const struct hc_driver xhci_pci_hc_driver = { 109 .description = hcd_name, 110 .product_desc = "xHCI Host Controller", 111 .hcd_priv_size = sizeof(struct xhci_hcd), 112 113 /* 114 * generic hardware linkage 115 */ 116 .irq = xhci_irq, 117 .flags = HCD_MEMORY | HCD_USB3, 118 119 /* 120 * basic lifecycle operations 121 */ 122 .reset = xhci_pci_setup, 123 .start = xhci_run, 124 /* suspend and resume implemented later */ 125 .stop = xhci_stop, 126 .shutdown = xhci_shutdown, 127 128 /* 129 * managing i/o requests and associated device resources 130 */ 131 .urb_enqueue = xhci_urb_enqueue, 132 .urb_dequeue = xhci_urb_dequeue, 133 .alloc_dev = xhci_alloc_dev, 134 .free_dev = xhci_free_dev, 135 .add_endpoint = xhci_add_endpoint, 136 .drop_endpoint = xhci_drop_endpoint, 137 .endpoint_reset = xhci_endpoint_reset, 138 .check_bandwidth = xhci_check_bandwidth, 139 .reset_bandwidth = xhci_reset_bandwidth, 140 .address_device = xhci_address_device, 141 .update_hub_device = xhci_update_hub_device, 142 143 /* 144 * scheduling support 145 */ 146 .get_frame_number = xhci_get_frame, 147 148 /* Root hub support */ 149 .hub_control = xhci_hub_control, 150 .hub_status_data = xhci_hub_status_data, 151 }; 152 153 /*-------------------------------------------------------------------------*/ 154 155 /* PCI driver selection metadata; PCI hotplugging uses this */ 156 static const struct pci_device_id pci_ids[] = { { 157 /* handle any USB 3.0 xHCI controller */ 158 PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_XHCI, ~0), 159 .driver_data = (unsigned long) &xhci_pci_hc_driver, 160 }, 161 { /* end: all zeroes */ } 162 }; 163 MODULE_DEVICE_TABLE(pci, pci_ids); 164 165 /* pci driver glue; this is a "new style" PCI driver module */ 166 static struct pci_driver xhci_pci_driver = { 167 .name = (char *) hcd_name, 168 .id_table = pci_ids, 169 170 .probe = usb_hcd_pci_probe, 171 .remove = usb_hcd_pci_remove, 172 /* suspend and resume implemented later */ 173 174 .shutdown = usb_hcd_pci_shutdown, 175 }; 176 177 int xhci_register_pci() 178 { 179 return pci_register_driver(&xhci_pci_driver); 180 } 181 182 void xhci_unregister_pci() 183 { 184 pci_unregister_driver(&xhci_pci_driver); 185 } 186