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_ASIX88179 34 { 35 .before_probe = ax88179_eth_before_probe, 36 .probe = ax88179_eth_probe, 37 .get_info = ax88179_eth_get_info, 38 }, 39 #endif 40 #ifdef CONFIG_USB_ETHER_MCS7830 41 { 42 .before_probe = mcs7830_eth_before_probe, 43 .probe = mcs7830_eth_probe, 44 .get_info = mcs7830_eth_get_info, 45 }, 46 #endif 47 #ifdef CONFIG_USB_ETHER_SMSC95XX 48 { 49 .before_probe = smsc95xx_eth_before_probe, 50 .probe = smsc95xx_eth_probe, 51 .get_info = smsc95xx_eth_get_info, 52 }, 53 #endif 54 { }, /* END */ 55 }; 56 57 static int usb_max_eth_dev; /* number of highest available usb eth device */ 58 static struct ueth_data usb_eth[USB_MAX_ETH_DEV]; 59 60 /******************************************************************************* 61 * tell if current ethernet device is a usb dongle 62 */ 63 int is_eth_dev_on_usb_host(void) 64 { 65 int i; 66 struct eth_device *dev = eth_get_dev(); 67 68 if (dev) { 69 for (i = 0; i < usb_max_eth_dev; i++) 70 if (&usb_eth[i].eth_dev == dev) 71 return 1; 72 } 73 return 0; 74 } 75 76 /* 77 * Given a USB device, ask each driver if it can support it, and attach it 78 * to the first driver that says 'yes' 79 */ 80 static void probe_valid_drivers(struct usb_device *dev) 81 { 82 struct eth_device *eth; 83 int j; 84 85 for (j = 0; prob_dev[j].probe && prob_dev[j].get_info; j++) { 86 if (!prob_dev[j].probe(dev, 0, &usb_eth[usb_max_eth_dev])) 87 continue; 88 /* 89 * ok, it is a supported eth device. Get info and fill it in 90 */ 91 eth = &usb_eth[usb_max_eth_dev].eth_dev; 92 if (prob_dev[j].get_info(dev, 93 &usb_eth[usb_max_eth_dev], 94 eth)) { 95 /* found proper driver */ 96 /* register with networking stack */ 97 usb_max_eth_dev++; 98 99 /* 100 * usb_max_eth_dev must be incremented prior to this 101 * call since eth_current_changed (internally called) 102 * relies on it 103 */ 104 eth_register(eth); 105 if (eth_write_hwaddr(eth, "usbeth", 106 usb_max_eth_dev - 1)) 107 puts("Warning: failed to set MAC address\n"); 108 break; 109 } 110 } 111 } 112 113 /******************************************************************************* 114 * scan the usb and reports device info 115 * to the user if mode = 1 116 * returns current device or -1 if no 117 */ 118 int usb_host_eth_scan(int mode) 119 { 120 int i, old_async; 121 struct usb_device *dev; 122 123 124 if (mode == 1) 125 printf(" scanning usb for ethernet devices... "); 126 127 old_async = usb_disable_asynch(1); /* asynch transfer not allowed */ 128 129 /* unregister a previously detected device */ 130 for (i = 0; i < usb_max_eth_dev; i++) 131 eth_unregister(&usb_eth[i].eth_dev); 132 133 memset(usb_eth, 0, sizeof(usb_eth)); 134 135 for (i = 0; prob_dev[i].probe; i++) { 136 if (prob_dev[i].before_probe) 137 prob_dev[i].before_probe(); 138 } 139 140 usb_max_eth_dev = 0; 141 for (i = 0; i < USB_MAX_DEVICE; i++) { 142 dev = usb_get_dev_index(i); /* get device */ 143 debug("i=%d\n", i); 144 if (dev == NULL) 145 break; /* no more devices available */ 146 147 /* find valid usb_ether driver for this device, if any */ 148 probe_valid_drivers(dev); 149 150 /* check limit */ 151 if (usb_max_eth_dev == USB_MAX_ETH_DEV) { 152 printf("max USB Ethernet Device reached: %d stopping\n", 153 usb_max_eth_dev); 154 break; 155 } 156 } /* for */ 157 158 usb_disable_asynch(old_async); /* restore asynch value */ 159 printf("%d Ethernet Device(s) found\n", usb_max_eth_dev); 160 if (usb_max_eth_dev > 0) 161 return 0; 162 return -1; 163 } 164