| * Copyright (C) 2016 Stefan Roese <sr@denx.de> |
| * SPDX-License-Identifier: GPL-2.0+ |
| #define WINBOND_ENTRY_KEY 0x87 |
| #define WINBOND_EXIT_KEY 0xaa |
| /* Enable configuration: pass entry key '0x87' into index port dev twice */ |
| static void pnp_enter_conf_state(u16 dev) |
| outb(WINBOND_ENTRY_KEY, port); |
| outb(WINBOND_ENTRY_KEY, port); |
| /* Disable configuration: pass exit key '0xAA' into index port dev */ |
| static void pnp_exit_conf_state(u16 dev) |
| outb(WINBOND_EXIT_KEY, port); |
| /* Bring up early serial debugging output before the RAM is initialized */ |
| void winbond_enable_serial(uint dev, uint iobase, uint irq) |
| pnp_enter_conf_state(dev); |
| pnp_set_logical_device(dev); |
| pnp_set_iobase(dev, PNP_IDX_IO0, iobase); |
| pnp_set_irq(dev, PNP_IDX_IRQ0, irq); |
| pnp_exit_conf_state(dev); |