New patch to review for coreboot: 79d7cb7 it8728f: ITE IT8728F superio early serial support.
Damien Zammit (damien@zamaudio.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/3794
-gerrit
commit 79d7cb7031a60fe946b57004140f5fe938582503 Author: Damien Zammit damien@zamaudio.com Date: Sat Jul 20 17:44:15 2013 +1000
it8728f: ITE IT8728F superio early serial support.
This is the first of a series of patches to provide support for a new mainboard, Gigabyte GA-B75M-D3V.
This patch provides early serial for the superio and works on this mainboard.
Change-Id: I5636199b49314166ed3b81e60b41131964dd44ff Signed-off-by: Damien Zammit damien@zamaudio.com --- src/superio/ite/Kconfig | 2 + src/superio/ite/Makefile.inc | 1 + src/superio/ite/it8728f/early_serial.c | 96 ++++++++++++++++++++++++++++++++++ src/superio/ite/it8728f/it8728f.h | 40 ++++++++++++++ 4 files changed, 139 insertions(+)
diff --git a/src/superio/ite/Kconfig b/src/superio/ite/Kconfig index e1970e8..b9411f5 100644 --- a/src/superio/ite/Kconfig +++ b/src/superio/ite/Kconfig @@ -40,3 +40,5 @@ config SUPERIO_ITE_IT8721F bool config SUPERIO_ITE_IT8772F bool +config SUPERIO_ITE_IT8728F + bool diff --git a/src/superio/ite/Makefile.inc b/src/superio/ite/Makefile.inc index ce595b8..bed9e7d 100644 --- a/src/superio/ite/Makefile.inc +++ b/src/superio/ite/Makefile.inc @@ -26,3 +26,4 @@ subdirs-y += it8716f subdirs-y += it8718f subdirs-y += it8721f subdirs-y += it8772f +subdirs-y += it8728f diff --git a/src/superio/ite/it8728f/early_serial.c b/src/superio/ite/it8728f/early_serial.c new file mode 100644 index 0000000..2dfb6e0 --- /dev/null +++ b/src/superio/ite/it8728f/early_serial.c @@ -0,0 +1,96 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2006 Uwe Hermann uwe@hermann-uwe.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 + */ + +#include <arch/io.h> +#include "it8728f.h" + +/* The base address is 0x2e or 0x4e, depending on config bytes. */ +#define SIO_BASE 0x2e +#define SIO_INDEX SIO_BASE +#define SIO_DATA (SIO_BASE + 1) + +/* Global configuration registers. */ +#define IT8728F_CONFIG_REG_CC 0x02 /* Configure Control (write-only). */ +#define IT8728F_CONFIG_REG_LDN 0x07 /* Logical Device Number. */ +#define IT8728F_CONFIG_REG_CHIPVERS 0x22 /* Chip version */ +#define IT8728F_CONFIG_REG_CLOCKSEL 0x23 /* Clock Selection. */ +#define IT8728F_CONFIG_REG_SWSUSP 0x24 /* Software Suspend, Flash I/F. 'Special register' */ + +static void it8728f_sio_write(u8 ldn, u8 index, u8 value) +{ + outb(IT8728F_CONFIG_REG_LDN, SIO_BASE); + outb(ldn, SIO_DATA); + outb(index, SIO_BASE); + outb(value, SIO_DATA); +} + +static void it8728f_enter_conf(device_t dev) +{ + u16 port = dev >> 8; + + outb(0x87, port); + outb(0x01, port); + outb(0x55, port); + outb((port == 0x4e) ? 0xaa : 0x55, port); +} + +static void it8728f_exit_conf(void) +{ + it8728f_sio_write(0x00, IT8728F_CONFIG_REG_CC, 0x02); +} + +/* Select 24MHz CLKIN (48MHz default). */ +void it8728f_24mhz_clkin(device_t dev) +{ + it8728f_enter_conf(dev); + it8728f_sio_write(0x00, IT8728F_CONFIG_REG_CLOCKSEL, 0x1); + it8728f_exit_conf(); +} + +/* + * GIGABYTE uses a special Super I/O register to protect its Dual BIOS + * mechanism. It lives in the GPIO LDN. However, register 0xEF is not + * mentioned in the IT8728F datasheet so just hardcode it to 0x7E for now. + * + * Bit 0 is dualbios SPI chipselect, the rest set to 0x7E makes it boot + * without falling into power cycle loop. + */ +void it8728f_disable_reboot(device_t dev) +{ + it8728f_enter_conf(dev); + it8728f_sio_write(IT8728F_GPIO, 0xEF, 0x7E); + it8728f_exit_conf(); +} + +/* Enable the serial port(s). */ +void it8728f_enable_serial(device_t dev, u16 iobase) +{ + /* (1) Enter the configuration state (MB PnP mode). */ + it8728f_enter_conf(dev); + + /* (2) Modify the data of configuration registers. */ + pnp_set_logical_device(dev); + pnp_set_enable(dev, 0); + pnp_set_iobase(dev, PNP_IDX_IO0, iobase); + pnp_set_enable(dev, 1); + + /* (3) Exit the configuration state (MB PnP mode). */ + it8728f_exit_conf(); +} diff --git a/src/superio/ite/it8728f/it8728f.h b/src/superio/ite/it8728f/it8728f.h new file mode 100644 index 0000000..2fe901f --- /dev/null +++ b/src/superio/ite/it8728f/it8728f.h @@ -0,0 +1,40 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2006 Uwe Hermann uwe@hermann-uwe.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 + */ + +#ifndef SUPERIO_ITE_IT8728F_IT8728F_H +#define SUPERIO_ITE_IT8728F_IT8728F_H + +#define IT8728F_FDC 0x00 /* Floppy */ +#define IT8728F_SP1 0x01 /* Com1 */ +#define IT8728F_SP2 0x02 /* Com2 */ +#define IT8728F_PP 0x03 /* Parallel port */ +#define IT8728F_EC 0x04 /* Environment controller */ +#define IT8728F_KBCK 0x05 /* PS/2 keyboard */ +#define IT8728F_KBCM 0x06 /* PS/2 mouse */ +#define IT8728F_GPIO 0x07 /* GPIO */ +#define IT8728F_IR 0x0a /* Consumer IR */ + +#if defined(__PRE_RAM__) +void it8728f_24mhz_clkin(device_t dev); +void it8728f_disable_reboot(device_t dev); +void it8728f_enable_serial(device_t dev, u16 iobase); +#endif + +#endif
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Damien Zammit