| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| /* Pre-RAM driver for the SMSC LPC47M15X Super I/O chip */ |
| |
| #include <arch/io.h> |
| #include <device/pnp_ops.h> |
| #include <device/pnp.h> |
| #include <stdint.h> |
| |
| #include "lpc47m15x.h" |
| |
| static void pnp_enter_conf_state(pnp_devfn_t dev) |
| { |
| u16 port = dev >> 8; |
| outb(0x55, port); |
| } |
| |
| static void pnp_exit_conf_state(pnp_devfn_t dev) |
| { |
| u16 port = dev >> 8; |
| outb(0xaa, port); |
| } |
| |
| void lpc47m15x_enable_serial(pnp_devfn_t dev, u16 iobase) |
| { |
| pnp_enter_conf_state(dev); |
| pnp_set_logical_device(dev); |
| pnp_set_enable(dev, 0); |
| pnp_set_iobase(dev, PNP_IDX_IO0, iobase); |
| pnp_set_enable(dev, 1); |
| pnp_exit_conf_state(dev); |
| } |