diff options
Diffstat (limited to 'src/superio')
| -rw-r--r-- | src/superio/nuvoton/Kconfig | 7 | ||||
| -rw-r--r-- | src/superio/nuvoton/Makefile.inc | 3 | ||||
| -rw-r--r-- | src/superio/nuvoton/common/early_serial.c | 75 | ||||
| -rw-r--r-- | src/superio/nuvoton/common/nuvoton.h (renamed from src/superio/nuvoton/nct5104d/early_init.c) | 34 | ||||
| -rw-r--r-- | src/superio/nuvoton/nct5104d/Makefile.inc | 1 | ||||
| -rw-r--r-- | src/superio/nuvoton/nct5104d/nct5104d.h | 2 |
6 files changed, 94 insertions, 28 deletions
diff --git a/src/superio/nuvoton/Kconfig b/src/superio/nuvoton/Kconfig index 142738d046..350c8dd387 100644 --- a/src/superio/nuvoton/Kconfig +++ b/src/superio/nuvoton/Kconfig @@ -17,7 +17,14 @@ ## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA ## +# Generic Nuvoton romstage driver - Just enough UART initialisation code for +# romstage. +config SUPERIO_NUVOTON_COMMON_ROMSTAGE + bool + config SUPERIO_NUVOTON_WPCM450 bool + config SUPERIO_NUVOTON_NCT5104D bool + select SUPERIO_NUVOTON_COMMON_ROMSTAGE diff --git a/src/superio/nuvoton/Makefile.inc b/src/superio/nuvoton/Makefile.inc index 18025c9c2d..1ce6963b79 100644 --- a/src/superio/nuvoton/Makefile.inc +++ b/src/superio/nuvoton/Makefile.inc @@ -17,5 +17,8 @@ ## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA ## +## include generic nuvoton pre-ram stage driver +romstage-$(CONFIG_SUPERIO_NUVOTON_COMMON_ROMSTAGE) += common/early_serial.c + subdirs-$(CONFIG_SUPERIO_NUVOTON_WPCM450) += wpcm450 subdirs-$(CONFIG_SUPERIO_NUVOTON_NCT5104D) += nct5104d diff --git a/src/superio/nuvoton/common/early_serial.c b/src/superio/nuvoton/common/early_serial.c new file mode 100644 index 0000000000..1cbcee8361 --- /dev/null +++ b/src/superio/nuvoton/common/early_serial.c @@ -0,0 +1,75 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2011 Advanced Micro Devices, Inc. + * Copyright (C) 2014 Edward O'Callaghan <eocallaghan@alterapraxis.com> + * Copyright (C) 2014 Felix Held <felix-coreboot@felixheld.de> + * + * 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; either version 2 of the License, or + * (at your option) any later version. + * + * 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 + */ + +/* + * A generic romstage (pre-ram) driver for Nuvoton variant Super I/O chips. + * + * The following is derived directly from the vendor Nuvoton's data-sheets: + * + * To toggle between `configuration mode` and `normal operation mode` as to + * manipulate the various LDN's in Nuvoton Super I/O's we are required to + * pass magic numbers `passwords keys`. + * + * NUVOTON_ENTRY_KEY := enable configuration : 0x87 + * NUVOTON_EXIT_KEY := disable configuration : 0xAA + * + * To modify a LDN's configuration register, we use the index port to select + * the index of the LDN and then write to the data port to alter the + * parameters. A default index, data port pair is 0x4E, 0x4F respectively, a + * user modified pair is 0x2E, 0x2F respectively. + * + */ + +#include <arch/io.h> +#include <device/pnp.h> +#include <stdint.h> +#include "nuvoton.h" + +#define NUVOTON_ENTRY_KEY 0x87 +#define NUVOTON_EXIT_KEY 0xAA + +/* Enable configuration: pass entry key '0x87' into index port dev + * two times. */ +static void pnp_enter_conf_state(device_t dev) +{ + u16 port = dev >> 8; + outb(NUVOTON_ENTRY_KEY, port); + outb(NUVOTON_ENTRY_KEY, port); +} + +/* Disable configuration: pass exit key '0xAA' into index port dev. */ +static void pnp_exit_conf_state(device_t dev) +{ + u16 port = dev >> 8; + outb(NUVOTON_EXIT_KEY, port); +} + +/* Bring up early serial debugging output before the RAM is initialized. */ +void nuvoton_enable_serial(device_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); +} diff --git a/src/superio/nuvoton/nct5104d/early_init.c b/src/superio/nuvoton/common/nuvoton.h index f3d8990fed..e9e8d4b2c9 100644 --- a/src/superio/nuvoton/nct5104d/early_init.c +++ b/src/superio/nuvoton/common/nuvoton.h @@ -1,7 +1,8 @@ /* * This file is part of the coreboot project. * - * Copyright (C) 2011 Advanced Micro Devices, Inc. + * Copyright (C) 2014 Edward O'Callaghan <eocallaghan@alterapraxis.com> + * Copyright (C) 2014 Felix Held <felix-coreboot@felixheld.de> * * 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 @@ -15,32 +16,15 @@ * * 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 + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ -#include <arch/io.h> -#include <device/pnp.h> -#include "nct5104d.h" +#ifndef SUPERIO_NUVOTON_COMMON_ROMSTAGE_H +#define SUPERIO_NUVOTON_COMMON_ROMSTAGE_H -static void pnp_enter_extended_mode(device_t dev) -{ - u16 port = dev >> 8; - outb(0x87,port); - outb(0x87,port); -} +#include <arch/io.h> +#include <stdint.h> -static void pnp_exit_extended_mode(device_t dev) -{ - u16 port = dev >> 8; - outb(0xaa,port); -} +void nuvoton_enable_serial(device_t dev, u16 iobase); -void nct5104d_enable_serial(device_t dev, u16 iobase) -{ - pnp_enter_extended_mode(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_extended_mode(dev); -} +#endif /* SUPERIO_NUVOTON_COMMON_ROMSTAGE_H */ diff --git a/src/superio/nuvoton/nct5104d/Makefile.inc b/src/superio/nuvoton/nct5104d/Makefile.inc index 7c97d059d5..fcb5ec22c3 100644 --- a/src/superio/nuvoton/nct5104d/Makefile.inc +++ b/src/superio/nuvoton/nct5104d/Makefile.inc @@ -18,5 +18,4 @@ ## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA ## -romstage-$(CONFIG_SUPERIO_NUVOTON_NCT5104D) += early_init.c ramstage-$(CONFIG_SUPERIO_NUVOTON_NCT5104D) += superio.c diff --git a/src/superio/nuvoton/nct5104d/nct5104d.h b/src/superio/nuvoton/nct5104d/nct5104d.h index 98baf810e5..5c30e02027 100644 --- a/src/superio/nuvoton/nct5104d/nct5104d.h +++ b/src/superio/nuvoton/nct5104d/nct5104d.h @@ -37,6 +37,4 @@ #define NCT5104D_GPIO1 ((1 << 8) | NCT5104D_GPIO_V) #define NCT5104D_GPIO6 ((6 << 8) | NCT5104D_GPIO_V) -void nct5104d_enable_serial(device_t dev, u16 iobase); - #endif /* SUPERIO_NUVOTON_NCT5104D_NCT5104D_H */ |