diff options
Diffstat (limited to 'src/superio/smsc/lpc47m15x/lpc47m15x_early_serial.c')
| -rw-r--r-- | src/superio/smsc/lpc47m15x/lpc47m15x_early_serial.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/src/superio/smsc/lpc47m15x/lpc47m15x_early_serial.c b/src/superio/smsc/lpc47m15x/lpc47m15x_early_serial.c new file mode 100644 index 0000000000..842be5ea04 --- /dev/null +++ b/src/superio/smsc/lpc47m15x/lpc47m15x_early_serial.c @@ -0,0 +1,42 @@ +/* + * lpc47m15x_early_serial.c: Pre-RAM driver for SMSC LPC47M15X Super I/O chip + * + * Copyright (C) 2009 coresystems GmbH + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <arch/romcc_io.h> +#include "lpc47m15x.h" + +static inline void pnp_enter_conf_state(device_t dev) +{ + unsigned port = dev>>8; + outb(0x55, port); +} + +static void pnp_exit_conf_state(device_t dev) { + unsigned port = dev>>8; + outb(0xaa, port); +} + +static void lpc47b272_enable_serial(device_t dev, unsigned 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); +} |