1 /*- 2 * Copyright (c) 2007-2008, Juniper Networks, Inc. 3 * All rights reserved. 4 * 5 * This program is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU General Public License as 7 * published by the Free Software Foundation version 2 of 8 * the License. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 18 * MA 02111-1307 USA 19 */ 20 21 #include <common.h> 22 #include <errno.h> 23 #include <pci.h> 24 #include <usb.h> 25 26 #include "ehci.h" 27 28 #ifdef CONFIG_PCI_EHCI_DEVICE 29 static struct pci_device_id ehci_pci_ids[] = { 30 /* Please add supported PCI EHCI controller ids here */ 31 {0x1033, 0x00E0}, /* NEC */ 32 {0x10B9, 0x5239}, /* ULI1575 PCI EHCI module ids */ 33 {0x12D8, 0x400F}, /* Pericom */ 34 {0, 0} 35 }; 36 #else 37 static pci_dev_t ehci_find_class(int index) 38 { 39 int bus; 40 int devnum; 41 pci_dev_t bdf; 42 uint32_t class; 43 44 for (bus = 0; bus <= pci_last_busno(); bus++) { 45 for (devnum = 0; devnum < PCI_MAX_PCI_DEVICES-1; devnum++) { 46 pci_read_config_dword(PCI_BDF(bus, devnum, 0), 47 PCI_CLASS_REVISION, &class); 48 if (class >> 16 == 0xffff) 49 continue; 50 51 for (bdf = PCI_BDF(bus, devnum, 0); 52 bdf <= PCI_BDF(bus, devnum, 53 PCI_MAX_PCI_FUNCTIONS - 1); 54 bdf += PCI_BDF(0, 0, 1)) { 55 pci_read_config_dword(bdf, PCI_CLASS_REVISION, 56 &class); 57 class >>= 8; 58 /* 59 * Here be dragons! In case we have multiple 60 * PCI EHCI controllers, this function will 61 * be called multiple times as well. This 62 * function will scan the PCI busses, always 63 * starting from bus 0, device 0, function 0, 64 * until it finds an USB controller. The USB 65 * stack gives us an 'index' of a controller 66 * that is currently being registered, which 67 * is a number, starting from 0 and growing 68 * in ascending order as controllers are added. 69 * To avoid probing the same controller in tne 70 * subsequent runs of this function, we will 71 * skip 'index - 1' detected controllers and 72 * report the index'th controller. 73 */ 74 if (class != PCI_CLASS_SERIAL_USB_EHCI) 75 continue; 76 if (index) { 77 index--; 78 continue; 79 } 80 /* Return index'th controller. */ 81 return bdf; 82 } 83 } 84 } 85 86 return -ENODEV; 87 } 88 #endif 89 90 /* 91 * Create the appropriate control structures to manage 92 * a new EHCI host controller. 93 */ 94 int ehci_hcd_init(int index, enum usb_init_type init, 95 struct ehci_hccr **ret_hccr, struct ehci_hcor **ret_hcor) 96 { 97 pci_dev_t pdev; 98 uint32_t cmd; 99 struct ehci_hccr *hccr; 100 struct ehci_hcor *hcor; 101 102 #ifdef CONFIG_PCI_EHCI_DEVICE 103 pdev = pci_find_devices(ehci_pci_ids, CONFIG_PCI_EHCI_DEVICE); 104 #else 105 pdev = ehci_find_class(index); 106 #endif 107 if (pdev < 0) { 108 printf("EHCI host controller not found\n"); 109 return -1; 110 } 111 112 hccr = (struct ehci_hccr *)pci_map_bar(pdev, 113 PCI_BASE_ADDRESS_0, PCI_REGION_MEM); 114 hcor = (struct ehci_hcor *)((uint32_t) hccr + 115 HC_LENGTH(ehci_readl(&hccr->cr_capbase))); 116 117 debug("EHCI-PCI init hccr 0x%x and hcor 0x%x hc_length %d\n", 118 (uint32_t)hccr, (uint32_t)hcor, 119 (uint32_t)HC_LENGTH(ehci_readl(&hccr->cr_capbase))); 120 121 *ret_hccr = hccr; 122 *ret_hcor = hcor; 123 124 /* enable busmaster */ 125 pci_read_config_dword(pdev, PCI_COMMAND, &cmd); 126 cmd |= PCI_COMMAND_MASTER; 127 pci_write_config_dword(pdev, PCI_COMMAND, cmd); 128 return 0; 129 } 130 131 /* 132 * Destroy the appropriate control structures corresponding 133 * the the EHCI host controller. 134 */ 135 int ehci_hcd_stop(int index) 136 { 137 return 0; 138 } 139