Date: Tue, 18 Oct 2016 23:27:50 +0000 (UTC) From: Oleksandr Tymoshenko <gonzo@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r307585 - stable/11/sys/dev/usb/net Message-ID: <201610182327.u9INRovA037341@repo.freebsd.org>
next in thread | raw e-mail | index | archive | help
Author: gonzo Date: Tue Oct 18 23:27:50 2016 New Revision: 307585 URL: https://svnweb.freebsd.org/changeset/base/307585 Log: MFC r307154: [fdt] Add one more heuristic to determine MAC address of the SMSC device - If check for net,ethernet/usb,device compatible node fails, try to find .../usb/hub/ethernet, where ... is bus path that can depend on actual HW. net,ethernet/usb,device compatibity strings are FreeBSD custom invention that is used only in RPi DTBs and since there is no other way to tie USB device to FDT node we just do our best effort here to work with upstream device tree - Use -1 value to indicate invalid phandle_t, 0 is valid phandle value and shouldn't be used as error signal Modified: stable/11/sys/dev/usb/net/if_smsc.c Directory Properties: stable/11/ (props changed) Modified: stable/11/sys/dev/usb/net/if_smsc.c ============================================================================== --- stable/11/sys/dev/usb/net/if_smsc.c Tue Oct 18 23:20:49 2016 (r307584) +++ stable/11/sys/dev/usb/net/if_smsc.c Tue Oct 18 23:27:50 2016 (r307585) @@ -1556,6 +1556,9 @@ smsc_ioctl(struct ifnet *ifp, u_long cmd } #ifdef FDT +/* + * This is FreeBSD-specific compatibility strings for RPi/RPi2 + */ static phandle_t smsc_fdt_find_eth_node(phandle_t start) { @@ -1567,11 +1570,68 @@ smsc_fdt_find_eth_node(phandle_t start) fdt_is_compatible(node, "usb,device")) return (node); child = smsc_fdt_find_eth_node(node); - if (child != 0) + if (child != -1) return (child); } - return (0); + return (-1); +} + +/* + * Check if node's path is <*>/usb/hub/ethernet + */ +static int +smsc_fdt_is_usb_eth(phandle_t node) +{ + char name[16]; + int len; + + memset(name, 0, sizeof(name)); + len = OF_getprop(node, "name", name, sizeof(name)); + if (len <= 0) + return (0); + + if (strcmp(name, "ethernet")) + return (0); + + node = OF_parent(node); + if (node == -1) + return (0); + len = OF_getprop(node, "name", name, sizeof(name)); + if (len <= 0) + return (0); + + if (strcmp(name, "hub")) + return (0); + + node = OF_parent(node); + if (node == -1) + return (0); + len = OF_getprop(node, "name", name, sizeof(name)); + if (len <= 0) + return (0); + + if (strcmp(name, "usb")) + return (0); + + return (1); +} + +static phandle_t +smsc_fdt_find_eth_node_by_path(phandle_t start) +{ + phandle_t child, node; + + /* Traverse through entire tree to find usb ethernet nodes. */ + for (node = OF_child(start); node != 0; node = OF_peer(node)) { + if (smsc_fdt_is_usb_eth(node)) + return (node); + child = smsc_fdt_find_eth_node_by_path(node); + if (child != -1) + return (child); + } + + return (-1); } /** @@ -1587,8 +1647,14 @@ smsc_fdt_find_mac(unsigned char *mac) root = OF_finddevice("/"); node = smsc_fdt_find_eth_node(root); - if (node != 0) { + /* + * If it's not FreeBSD FDT blob for RPi, try more + * generic .../usb/hub/ethernet + */ + if (node == -1) + node = smsc_fdt_find_eth_node_by_path(root); + if (node != -1) { /* Check if there is property */ if ((len = OF_getproplen(node, "local-mac-address")) > 0) { if (len != ETHER_ADDR_LEN)
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201610182327.u9INRovA037341>