1*a2927e09SBin Meng /* 2*a2927e09SBin Meng * Copyright (C) 2014, Bin Meng <bmeng.cn@gmail.com> 3*a2927e09SBin Meng * 4*a2927e09SBin Meng * SPDX-License-Identifier: GPL-2.0+ 5*a2927e09SBin Meng */ 6*a2927e09SBin Meng 7*a2927e09SBin Meng #include <common.h> 8*a2927e09SBin Meng #include <asm/io.h> 9*a2927e09SBin Meng #include <asm/pnp_def.h> 10*a2927e09SBin Meng 11*a2927e09SBin Meng static void pnp_enter_conf_state(u16 dev) 12*a2927e09SBin Meng { 13*a2927e09SBin Meng u16 port = dev >> 8; 14*a2927e09SBin Meng 15*a2927e09SBin Meng outb(0x55, port); 16*a2927e09SBin Meng } 17*a2927e09SBin Meng 18*a2927e09SBin Meng static void pnp_exit_conf_state(u16 dev) 19*a2927e09SBin Meng { 20*a2927e09SBin Meng u16 port = dev >> 8; 21*a2927e09SBin Meng 22*a2927e09SBin Meng outb(0xaa, port); 23*a2927e09SBin Meng } 24*a2927e09SBin Meng 25*a2927e09SBin Meng void lpc47m_enable_serial(u16 dev, u16 iobase) 26*a2927e09SBin Meng { 27*a2927e09SBin Meng pnp_enter_conf_state(dev); 28*a2927e09SBin Meng pnp_set_logical_device(dev); 29*a2927e09SBin Meng pnp_set_enable(dev, 0); 30*a2927e09SBin Meng pnp_set_iobase(dev, PNP_IDX_IO0, iobase); 31*a2927e09SBin Meng pnp_set_enable(dev, 1); 32*a2927e09SBin Meng pnp_exit_conf_state(dev); 33*a2927e09SBin Meng } 34