// SPDX-License-Identifier: GPL-2.0-only /* * Miscellaneous SoC-specific hooks. * * Copyright (C) 2011 Texas Instruments Incorporated * Author: Mark Salter <msalter@redhat.com> */ #include <linux/module.h> #include <linux/ctype.h> #include <linux/etherdevice.h> #include <asm/setup.h> #include <asm/soc.h> struct soc_ops soc_ops; int soc_get_exception(void) { if (!soc_ops.get_exception) return -1; return soc_ops.get_exception(); } void soc_assert_event(unsigned int evt) { if (soc_ops.assert_event) soc_ops.assert_event(evt); } static u8 cmdline_mac[6]; static int __init get_mac_addr_from_cmdline(char *str) { int count, i, val; for (count = 0; count < 6 && *str; count++, str += 3) { if (!isxdigit(str[0]) || !isxdigit(str[1])) return 0; if (str[2] != ((count < 5) ? ':' : '\0')) return 0; for (i = 0, val = 0; i < 2; i++) { val = val << 4; val |= isdigit(str[i]) ? str[i] - '0' : toupper(str[i]) - 'A' + 10; } cmdline_mac[count] = val; } return 1; } __setup("emac_addr=", get_mac_addr_from_cmdline); /* * Setup the MAC address for SoC ethernet devices. * * Before calling this function, the ethernet driver will have * initialized the addr with local-mac-address from the device * tree (if found). Allow command line to override, but not * the fused address. */ int soc_mac_addr(unsigned int index, u8 *addr) { int i, have_dt_mac = 0, have_cmdline_mac = 0, have_fuse_mac = 0; for (i = 0; i < 6; i++) { if (cmdline_mac[i]) have_cmdline_mac = 1; if (c6x_fuse_mac[i]) have_fuse_mac = 1; if (addr[i]) have_dt_mac = 1; } /* cmdline overrides all */ if (have_cmdline_mac) memcpy(addr, cmdline_mac, 6); else if (!have_dt_mac) { if (have_fuse_mac) memcpy(addr, c6x_fuse_mac, 6); else eth_random_addr(addr); } /* adjust for specific EMAC device */ addr[5] += index * c6x_num_cores; return 1; } EXPORT_SYMBOL_GPL(soc_mac_addr);