Sarah Sharp | 66d4ead | 2009-04-27 19:52:28 -0700 | [diff] [blame] | 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 | */ |
Sarah Sharp | 7f84eef | 2009-04-27 19:53:56 -0700 | [diff] [blame] | 99 | .irq = xhci_irq, |
Sarah Sharp | 66d4ead | 2009-04-27 19:52:28 -0700 | [diff] [blame] | 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 | /* |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 112 | * managing i/o requests and associated device resources |
| 113 | */ |
Sarah Sharp | d0e96f5 | 2009-04-27 19:58:01 -0700 | [diff] [blame] | 114 | .urb_enqueue = xhci_urb_enqueue, |
| 115 | .urb_dequeue = xhci_urb_dequeue, |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 116 | .alloc_dev = xhci_alloc_dev, |
| 117 | .free_dev = xhci_free_dev, |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 118 | .add_endpoint = xhci_add_endpoint, |
| 119 | .drop_endpoint = xhci_drop_endpoint, |
Sarah Sharp | a1587d9 | 2009-07-27 12:03:15 -0700 | [diff] [blame] | 120 | .endpoint_reset = xhci_endpoint_reset, |
Sarah Sharp | f94e0186 | 2009-04-27 19:58:38 -0700 | [diff] [blame] | 121 | .check_bandwidth = xhci_check_bandwidth, |
| 122 | .reset_bandwidth = xhci_reset_bandwidth, |
Sarah Sharp | 3ffbba9 | 2009-04-27 19:57:38 -0700 | [diff] [blame] | 123 | .address_device = xhci_address_device, |
| 124 | |
| 125 | /* |
Sarah Sharp | 66d4ead | 2009-04-27 19:52:28 -0700 | [diff] [blame] | 126 | * scheduling support |
| 127 | */ |
| 128 | .get_frame_number = xhci_get_frame, |
| 129 | |
Sarah Sharp | 0f2a793 | 2009-04-27 19:57:12 -0700 | [diff] [blame] | 130 | /* Root hub support */ |
| 131 | .hub_control = xhci_hub_control, |
| 132 | .hub_status_data = xhci_hub_status_data, |
Sarah Sharp | 66d4ead | 2009-04-27 19:52:28 -0700 | [diff] [blame] | 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 | } |