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/************************************************************************** * I.MX6 MAC Address hacking * 说明: * 本文记录I.MX6驱动是如何获取MAC地址的。 * * 2016-6-24 深圳 南山平山村 曾剑锋 **************************************************************************/ /* * initialize __mach_desc_MX6Q_SABRESD data structure. */ MACHINE_START(MX6Q_SABRESD, "Freescale i.MX 6Quad/DualLite/Solo Sabre-SD Board") /* Maintainer: Freescale Semiconductor, Inc. */ .boot_params = MX6_PHYS_OFFSET + 0x100, .fixup = fixup_mxc_board, .map_io = mx6_map_io, .init_irq = mx6_init_irq, .init_machine = mx6_sabresd_board_init, --------------+ .timer = &mx6_sabresd_timer, | .reserve = mx6q_sabresd_reserve, | MACHINE_END | | | static void __init mx6_sabresd_board_init(void) <-------------+ { ...... imx6_init_fec(fec_data); --------------------+ ...... | } | | void __init imx6_init_fec(struct fec_platform_data fec_data) <----+ { fec_get_mac_addr(fec_data.mac); ----------+ if (!is_valid_ether_addr(fec_data.mac)) | random_ether_addr(fec_data.mac); | | if (cpu_is_mx6sl()) | imx6sl_add_fec(&fec_data); | else | imx6q_add_fec(&fec_data); | } | | static int fec_get_mac_addr(unsigned char *mac) <----------+ { unsigned int value; value = readl(MX6_IO_ADDRESS(OCOTP_BASE_ADDR) + HW_OCOTP_MACn(0)); mac[5] = value & 0xff; mac[4] = (value >> 8) & 0xff; mac[3] = (value >> 16) & 0xff; mac[2] = (value >> 24) & 0xff; value = readl(MX6_IO_ADDRESS(OCOTP_BASE_ADDR) + HW_OCOTP_MACn(1)); mac[1] = value & 0xff; mac[0] = (value >> 8) & 0xff; return 0; }
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原文地址:http://www.cnblogs.com/zengjfgit/p/5615273.html