diff options
Diffstat (limited to 'src/superio')
| -rw-r--r-- | src/superio/intel/Kconfig | 3 | ||||
| -rw-r--r-- | src/superio/intel/Makefile.inc | 1 | ||||
| -rw-r--r-- | src/superio/intel/i8900/Makefile.inc | 22 | ||||
| -rw-r--r-- | src/superio/intel/i8900/early_serial.c | 69 | ||||
| -rw-r--r-- | src/superio/intel/i8900/i8900.h | 60 | ||||
| -rw-r--r-- | src/superio/intel/i8900/superio.c | 90 |
6 files changed, 245 insertions, 0 deletions
diff --git a/src/superio/intel/Kconfig b/src/superio/intel/Kconfig index e797bd7dfa..b41d24e712 100644 --- a/src/superio/intel/Kconfig +++ b/src/superio/intel/Kconfig @@ -15,3 +15,6 @@ config SUPERIO_INTEL_I3100 bool + +config SUPERIO_INTEL_I8900 + bool diff --git a/src/superio/intel/Makefile.inc b/src/superio/intel/Makefile.inc index fe1d6d19cd..f46408a759 100644 --- a/src/superio/intel/Makefile.inc +++ b/src/superio/intel/Makefile.inc @@ -14,3 +14,4 @@ ## subdirs-y += i3100 +subdirs-y += i8900 diff --git a/src/superio/intel/i8900/Makefile.inc b/src/superio/intel/i8900/Makefile.inc new file mode 100644 index 0000000000..abdc473efb --- /dev/null +++ b/src/superio/intel/i8900/Makefile.inc @@ -0,0 +1,22 @@ +## +## This file is part of the coreboot project. +## +## Copyright (C) 2008 Arastra, Inc. +## +## 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. +## + +romstage-$(CONFIG_SUPERIO_INTEL_I8900) += early_serial.c +ramstage-$(CONFIG_SUPERIO_INTEL_I8900) += superio.c diff --git a/src/superio/intel/i8900/early_serial.c b/src/superio/intel/i8900/early_serial.c new file mode 100644 index 0000000000..fb211e96e6 --- /dev/null +++ b/src/superio/intel/i8900/early_serial.c @@ -0,0 +1,69 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2008 Arastra, Inc. + * + * 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. + */ + +#include <arch/io.h> +#include <device/pnp.h> +#include "i8900.h" + +static void pnp_enter_ext_func_mode(pnp_devfn_t dev) +{ + u16 port = dev >> 8; + + outb(0x80, port); + outb(0x86, port); +} + +static void pnp_exit_ext_func_mode(pnp_devfn_t dev) +{ + u16 port = dev >> 8; + + outb(0x68, port); + outb(0x08, port); +} + +/* Enable device interrupts, set UART_CLK predivide. */ +void i8900_configure_uart_clk(pnp_devfn_t dev, u8 predivide) +{ + pnp_enter_ext_func_mode(dev); + pnp_write_config(dev, I8900_SIW_CONFIGURATION, + (predivide << 2) | I8900_ENABLE_SIRQ); + pnp_exit_ext_func_mode(dev); +} + +void i8900_enable_serial(pnp_devfn_t dev, u16 iobase) +{ + pnp_enter_ext_func_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_ext_func_mode(dev); +} + +void i8900_enable_wdt(pnp_devfn_t dev, u16 iobase) +{ + /* Enable WDT */ + pnp_enter_ext_func_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_ext_func_mode(dev); +} diff --git a/src/superio/intel/i8900/i8900.h b/src/superio/intel/i8900/i8900.h new file mode 100644 index 0000000000..e53a0a86e1 --- /dev/null +++ b/src/superio/intel/i8900/i8900.h @@ -0,0 +1,60 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2008 Arastra, Inc. + * + * 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_INTEL_I8900_I8900_H +#define SUPERIO_INTEL_I8900_I8900_H + +/* + * The SIW ("Serial I/O and Watchdog Timer") integrated into the i8900 is + * very similar to a Super I/O, both in functionality and config mechanism. + * + * The SIW contains: + * - UART(s) + * - Serial interrupt controller + * - Watchdog timer (WDT) + * - LPC interface + */ + +/* Logical device numbers (LDNs). */ +#define I8900_SP1 0x04 /* Com1 */ +#define I8900_SP2 0x05 /* Com2 */ +#define I8900_WDT 0x06 /* Watchdog timer */ + +/* Registers and bit definitions: */ + +#define I8900_SIW_CONFIGURATION 0x29 + +/* + * SIW_CONFIGURATION[3:2] = UART_CLK predivide + * 00: divide by 1 + * 01: divide by 8 + * 10: divide by 26 + * 11: reserved + */ +#define I8900_UART_CLK_PREDIVIDE_1 0x00 +#define I8900_UART_CLK_PREDIVIDE_8 0x01 +#define I8900_UART_CLK_PREDIVIDE_26 0x02 +#define I8900_ENABLE_SIRQ 0x01 + +void i8900_configure_uart_clk(device_t dev, u8 predivide); +void i8900_enable_serial(device_t dev, u16 iobase); +void i8900_enable_wdt(device_t dev, u16 iobase); + +#endif diff --git a/src/superio/intel/i8900/superio.c b/src/superio/intel/i8900/superio.c new file mode 100644 index 0000000000..f92f457253 --- /dev/null +++ b/src/superio/intel/i8900/superio.c @@ -0,0 +1,90 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2008 Arastra, Inc. + * + * 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. + */ + +#include <stdlib.h> +#include <device/device.h> +#include <device/pnp.h> +#include <drivers/uart/uart8250reg.h> +#include "i8900.h" +#include <arch/io.h> + +static void pnp_enter_ext_func_mode(struct device *dev) +{ + outb(0x80, dev->path.pnp.port); + outb(0x86, dev->path.pnp.port); +} + +static void pnp_exit_ext_func_mode(struct device *dev) +{ + outb(0x68, dev->path.pnp.port); + outb(0x08, dev->path.pnp.port); +} + +static void i8900_init(struct device *dev) +{ + if (!dev->enabled) + return; +} + +static void i8900_pnp_set_resources(struct device *dev) +{ + pnp_enter_ext_func_mode(dev); + pnp_set_resources(dev); + pnp_exit_ext_func_mode(dev); +} + +static void i8900_pnp_enable_resources(struct device *dev) +{ + pnp_enter_ext_func_mode(dev); + pnp_enable_resources(dev); + pnp_exit_ext_func_mode(dev); +} + +static void i8900_pnp_enable(struct device *dev) +{ + pnp_enter_ext_func_mode(dev); + pnp_set_logical_device(dev); + pnp_set_enable(dev, !!dev->enabled); + pnp_exit_ext_func_mode(dev); +} + +static struct device_operations ops = { + .read_resources = pnp_read_resources, + .set_resources = i8900_pnp_set_resources, + .enable_resources = i8900_pnp_enable_resources, + .enable = i8900_pnp_enable, + .init = i8900_init, +}; + +static struct pnp_info pnp_dev_info[] = { + { &ops, I8900_SP1, PNP_IO0 | PNP_IRQ0, {0x07f8, 0}, }, + { &ops, I8900_SP2, PNP_IO0 | PNP_IRQ0, {0x07f8, 0}, }, + { &ops, I8900_WDT, PNP_IO0 | PNP_IRQ0, {0x07f8, 0}, }, +}; + +static void enable_dev(struct device *dev) +{ + pnp_enable_devices(dev, &ops, ARRAY_SIZE(pnp_dev_info), pnp_dev_info); +} + +struct chip_operations superio_intel_i8900_ops = { + CHIP_NAME("Intel 8900 Super I/O") + .enable_dev = enable_dev, +}; |