1 /* 2 * Copyright (c) 2011 The Chromium OS Authors. 3 * See file CREDITS for list of people who contributed to this 4 * project. 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License as 8 * published by the Free Software Foundation; either version 2 of 9 * the License, or (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 19 * MA 02111-1307 USA 20 */ 21 22 #include <common.h> 23 #include <usb.h> 24 25 #include "usb_ether.h" 26 27 typedef void (*usb_eth_before_probe)(void); 28 typedef int (*usb_eth_probe)(struct usb_device *dev, unsigned int ifnum, 29 struct ueth_data *ss); 30 typedef int (*usb_eth_get_info)(struct usb_device *dev, struct ueth_data *ss, 31 struct eth_device *dev_desc); 32 33 struct usb_eth_prob_dev { 34 usb_eth_before_probe before_probe; /* optional */ 35 usb_eth_probe probe; 36 usb_eth_get_info get_info; 37 }; 38 39 /* driver functions go here, each bracketed by #ifdef CONFIG_USB_ETHER_xxx */ 40 static const struct usb_eth_prob_dev prob_dev[] = { 41 #ifdef CONFIG_USB_ETHER_ASIX 42 { 43 .before_probe = asix_eth_before_probe, 44 .probe = asix_eth_probe, 45 .get_info = asix_eth_get_info, 46 }, 47 #endif 48 #ifdef CONFIG_USB_ETHER_SMSC95XX 49 { 50 .before_probe = smsc95xx_eth_before_probe, 51 .probe = smsc95xx_eth_probe, 52 .get_info = smsc95xx_eth_get_info, 53 }, 54 #endif 55 { }, /* END */ 56 }; 57 58 static int usb_max_eth_dev; /* number of highest available usb eth device */ 59 static struct ueth_data usb_eth[USB_MAX_ETH_DEV]; 60 61 /******************************************************************************* 62 * tell if current ethernet device is a usb dongle 63 */ 64 int is_eth_dev_on_usb_host(void) 65 { 66 int i; 67 struct eth_device *dev = eth_get_dev(); 68 69 if (dev) { 70 for (i = 0; i < usb_max_eth_dev; i++) 71 if (&usb_eth[i].eth_dev == dev) 72 return 1; 73 } 74 return 0; 75 } 76 77 /* 78 * Given a USB device, ask each driver if it can support it, and attach it 79 * to the first driver that says 'yes' 80 */ 81 static void probe_valid_drivers(struct usb_device *dev) 82 { 83 struct eth_device *eth; 84 int j; 85 86 for (j = 0; prob_dev[j].probe && prob_dev[j].get_info; j++) { 87 if (!prob_dev[j].probe(dev, 0, &usb_eth[usb_max_eth_dev])) 88 continue; 89 /* 90 * ok, it is a supported eth device. Get info and fill it in 91 */ 92 eth = &usb_eth[usb_max_eth_dev].eth_dev; 93 if (prob_dev[j].get_info(dev, 94 &usb_eth[usb_max_eth_dev], 95 eth)) { 96 /* found proper driver */ 97 /* register with networking stack */ 98 usb_max_eth_dev++; 99 100 /* 101 * usb_max_eth_dev must be incremented prior to this 102 * call since eth_current_changed (internally called) 103 * relies on it 104 */ 105 eth_register(eth); 106 if (eth_write_hwaddr(eth, "usbeth", 107 usb_max_eth_dev - 1)) 108 puts("Warning: failed to set MAC address\n"); 109 break; 110 } 111 } 112 } 113 114 /******************************************************************************* 115 * scan the usb and reports device info 116 * to the user if mode = 1 117 * returns current device or -1 if no 118 */ 119 int usb_host_eth_scan(int mode) 120 { 121 int i, old_async; 122 struct usb_device *dev; 123 124 125 if (mode == 1) 126 printf(" scanning usb for ethernet devices... "); 127 128 old_async = usb_disable_asynch(1); /* asynch transfer not allowed */ 129 130 /* unregister a previously detected device */ 131 for (i = 0; i < usb_max_eth_dev; i++) 132 eth_unregister(&usb_eth[i].eth_dev); 133 134 memset(usb_eth, 0, sizeof(usb_eth)); 135 136 for (i = 0; prob_dev[i].probe; i++) { 137 if (prob_dev[i].before_probe) 138 prob_dev[i].before_probe(); 139 } 140 141 usb_max_eth_dev = 0; 142 for (i = 0; i < USB_MAX_DEVICE; i++) { 143 dev = usb_get_dev_index(i); /* get device */ 144 debug("i=%d\n", i); 145 if (dev == NULL) 146 break; /* no more devices available */ 147 148 /* find valid usb_ether driver for this device, if any */ 149 probe_valid_drivers(dev); 150 151 /* check limit */ 152 if (usb_max_eth_dev == USB_MAX_ETH_DEV) { 153 printf("max USB Ethernet Device reached: %d stopping\n", 154 usb_max_eth_dev); 155 break; 156 } 157 } /* for */ 158 159 usb_disable_asynch(old_async); /* restore asynch value */ 160 printf("%d Ethernet Device(s) found\n", usb_max_eth_dev); 161 if (usb_max_eth_dev > 0) 162 return 0; 163 return -1; 164 } 165