1 /* 2 * Copyright (c) 2011 The Chromium OS Authors. 3 * 4 * SPDX-License-Identifier: GPL-2.0+ 5 */ 6 7 #include <common.h> 8 #include <usb.h> 9 10 #include "usb_ether.h" 11 12 typedef void (*usb_eth_before_probe)(void); 13 typedef int (*usb_eth_probe)(struct usb_device *dev, unsigned int ifnum, 14 struct ueth_data *ss); 15 typedef int (*usb_eth_get_info)(struct usb_device *dev, struct ueth_data *ss, 16 struct eth_device *dev_desc); 17 18 struct usb_eth_prob_dev { 19 usb_eth_before_probe before_probe; /* optional */ 20 usb_eth_probe probe; 21 usb_eth_get_info get_info; 22 }; 23 24 /* driver functions go here, each bracketed by #ifdef CONFIG_USB_ETHER_xxx */ 25 static const struct usb_eth_prob_dev prob_dev[] = { 26 #ifdef CONFIG_USB_ETHER_ASIX 27 { 28 .before_probe = asix_eth_before_probe, 29 .probe = asix_eth_probe, 30 .get_info = asix_eth_get_info, 31 }, 32 #endif 33 #ifdef CONFIG_USB_ETHER_MCS7830 34 { 35 .before_probe = mcs7830_eth_before_probe, 36 .probe = mcs7830_eth_probe, 37 .get_info = mcs7830_eth_get_info, 38 }, 39 #endif 40 #ifdef CONFIG_USB_ETHER_SMSC95XX 41 { 42 .before_probe = smsc95xx_eth_before_probe, 43 .probe = smsc95xx_eth_probe, 44 .get_info = smsc95xx_eth_get_info, 45 }, 46 #endif 47 { }, /* END */ 48 }; 49 50 static int usb_max_eth_dev; /* number of highest available usb eth device */ 51 static struct ueth_data usb_eth[USB_MAX_ETH_DEV]; 52 53 /******************************************************************************* 54 * tell if current ethernet device is a usb dongle 55 */ 56 int is_eth_dev_on_usb_host(void) 57 { 58 int i; 59 struct eth_device *dev = eth_get_dev(); 60 61 if (dev) { 62 for (i = 0; i < usb_max_eth_dev; i++) 63 if (&usb_eth[i].eth_dev == dev) 64 return 1; 65 } 66 return 0; 67 } 68 69 /* 70 * Given a USB device, ask each driver if it can support it, and attach it 71 * to the first driver that says 'yes' 72 */ 73 static void probe_valid_drivers(struct usb_device *dev) 74 { 75 struct eth_device *eth; 76 int j; 77 78 for (j = 0; prob_dev[j].probe && prob_dev[j].get_info; j++) { 79 if (!prob_dev[j].probe(dev, 0, &usb_eth[usb_max_eth_dev])) 80 continue; 81 /* 82 * ok, it is a supported eth device. Get info and fill it in 83 */ 84 eth = &usb_eth[usb_max_eth_dev].eth_dev; 85 if (prob_dev[j].get_info(dev, 86 &usb_eth[usb_max_eth_dev], 87 eth)) { 88 /* found proper driver */ 89 /* register with networking stack */ 90 usb_max_eth_dev++; 91 92 /* 93 * usb_max_eth_dev must be incremented prior to this 94 * call since eth_current_changed (internally called) 95 * relies on it 96 */ 97 eth_register(eth); 98 if (eth_write_hwaddr(eth, "usbeth", 99 usb_max_eth_dev - 1)) 100 puts("Warning: failed to set MAC address\n"); 101 break; 102 } 103 } 104 } 105 106 /******************************************************************************* 107 * scan the usb and reports device info 108 * to the user if mode = 1 109 * returns current device or -1 if no 110 */ 111 int usb_host_eth_scan(int mode) 112 { 113 int i, old_async; 114 struct usb_device *dev; 115 116 117 if (mode == 1) 118 printf(" scanning usb for ethernet devices... "); 119 120 old_async = usb_disable_asynch(1); /* asynch transfer not allowed */ 121 122 /* unregister a previously detected device */ 123 for (i = 0; i < usb_max_eth_dev; i++) 124 eth_unregister(&usb_eth[i].eth_dev); 125 126 memset(usb_eth, 0, sizeof(usb_eth)); 127 128 for (i = 0; prob_dev[i].probe; i++) { 129 if (prob_dev[i].before_probe) 130 prob_dev[i].before_probe(); 131 } 132 133 usb_max_eth_dev = 0; 134 for (i = 0; i < USB_MAX_DEVICE; i++) { 135 dev = usb_get_dev_index(i); /* get device */ 136 debug("i=%d\n", i); 137 if (dev == NULL) 138 break; /* no more devices available */ 139 140 /* find valid usb_ether driver for this device, if any */ 141 probe_valid_drivers(dev); 142 143 /* check limit */ 144 if (usb_max_eth_dev == USB_MAX_ETH_DEV) { 145 printf("max USB Ethernet Device reached: %d stopping\n", 146 usb_max_eth_dev); 147 break; 148 } 149 } /* for */ 150 151 usb_disable_asynch(old_async); /* restore asynch value */ 152 printf("%d Ethernet Device(s) found\n", usb_max_eth_dev); 153 if (usb_max_eth_dev > 0) 154 return 0; 155 return -1; 156 } 157