diff options
Diffstat (limited to 'src/ec')
| -rw-r--r-- | src/ec/Kconfig | 1 | ||||
| -rw-r--r-- | src/ec/Makefile.inc | 1 | ||||
| -rw-r--r-- | src/ec/acpi/Kconfig | 4 | ||||
| -rw-r--r-- | src/ec/acpi/Makefile.inc | 2 | ||||
| -rw-r--r-- | src/ec/acpi/ec.c | 118 | ||||
| -rw-r--r-- | src/ec/acpi/ec.h | 49 |
6 files changed, 175 insertions, 0 deletions
diff --git a/src/ec/Kconfig b/src/ec/Kconfig new file mode 100644 index 0000000000..9408f6bd9e --- /dev/null +++ b/src/ec/Kconfig @@ -0,0 +1 @@ +source src/ec/acpi/Kconfig diff --git a/src/ec/Makefile.inc b/src/ec/Makefile.inc new file mode 100644 index 0000000000..20d71ab786 --- /dev/null +++ b/src/ec/Makefile.inc @@ -0,0 +1 @@ +subdirs-y += acpi diff --git a/src/ec/acpi/Kconfig b/src/ec/acpi/Kconfig new file mode 100644 index 0000000000..642f1786c1 --- /dev/null +++ b/src/ec/acpi/Kconfig @@ -0,0 +1,4 @@ +config EC_ACPI + bool + help + ACPI Embedded Controller interface. Mostly found in laptops. diff --git a/src/ec/acpi/Makefile.inc b/src/ec/acpi/Makefile.inc new file mode 100644 index 0000000000..34c5136052 --- /dev/null +++ b/src/ec/acpi/Makefile.inc @@ -0,0 +1,2 @@ +ramstage-y += ec.c +smm-$(CONFIG_HAVE_SMI_HANDLER) += ec.c diff --git a/src/ec/acpi/ec.c b/src/ec/acpi/ec.c new file mode 100644 index 0000000000..7a01b7e455 --- /dev/null +++ b/src/ec/acpi/ec.c @@ -0,0 +1,118 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2008-2009 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 <console/console.h> +#include <device/device.h> +#include <arch/io.h> +#include <delay.h> +#include "ec.h" + +int send_ec_command(u8 command) +{ + int timeout; + + timeout = 0x7ff; + while ((inb(EC_SC) & EC_IBF) && --timeout) { + udelay(10); + if ((timeout & 0xff) == 0) + printk(BIOS_SPEW, "."); + } + if (!timeout) { + printk(BIOS_DEBUG, "Timeout while sending command 0x%02x to EC!\n", + command); + // return -1; + } + + outb(command, EC_SC); + return 0; +} + +int send_ec_data(u8 data) +{ + int timeout; + + timeout = 0x7ff; + while ((inb(EC_SC) & EC_IBF) && --timeout) { // wait for IBF = 0 + udelay(10); + if ((timeout & 0xff) == 0) + printk(BIOS_SPEW, "."); + } + if (!timeout) { + printk(BIOS_DEBUG, "Timeout while sending data 0x%02x to EC!\n", + data); + // return -1; + } + + outb(data, EC_DATA); + + return 0; +} + +int send_ec_data_nowait(u8 data) +{ + outb(data, EC_DATA); + + return 0; +} + +u8 recv_ec_data(void) +{ + int timeout; + u8 data; + + timeout = 0x7fff; + while (--timeout) { // Wait for OBF = 1 + if (inb(EC_SC) & EC_OBF) { + break; + } + udelay(10); + if ((timeout & 0xff) == 0) + printk(BIOS_SPEW, "."); + } + if (!timeout) { + printk(BIOS_DEBUG, "\nTimeout while receiving data from EC!\n"); + // return -1; + } + + data = inb(EC_DATA); + printk(BIOS_DEBUG, "recv_ec_data: 0x%02x\n", data); + + return data; +} + +u8 ec_read(u8 addr) +{ + send_ec_command(0x80); + send_ec_data(addr); + + return recv_ec_data(); +} + +int ec_write(u8 addr, u8 data) +{ + send_ec_command(0x81); + send_ec_data(addr); + return send_ec_data(data); +} + +struct chip_operations ec_acpi_ops = { + CHIP_NAME("ACPI Embedded Controller") +}; diff --git a/src/ec/acpi/ec.h b/src/ec/acpi/ec.h new file mode 100644 index 0000000000..77ee6379ea --- /dev/null +++ b/src/ec/acpi/ec.h @@ -0,0 +1,49 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2008-2009 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 + */ + +#ifndef _EC_ACPI_H +#define _EC_ACPI_H + +#define EC_DATA 0x62 +#define EC_SC 0x66 + +/* EC_SC input */ +#define EC_SMI_EVT (1 << 6) // 1: SMI event pending +#define EC_SCI_EVT (1 << 5) // 1: SCI event pending +#define EC_BURST (1 << 4) // controller is in burst mode +#define EC_CMD (1 << 3) // 1: byte in data register is command + // 0: byte in data register is data +#define EC_IBF (1 << 1) // 1: input buffer full (data ready for ec) +#define EC_OBF (1 << 0) // 1: output buffer full (data ready for host) +/* EC_SC output */ +#define RD_EC 0x80 // Read Embedded Controller +#define WR_EC 0x81 // Write Embedded Controller +#define BE_EC 0x82 // Burst Enable Embedded Controller +#define BD_EC 0x83 // Burst Disable Embedded Controller +#define QR_EC 0x84 // Query Embedded Controller + +int send_ec_command(u8 command); +int send_ec_data(u8 data); +int send_ec_data_nowait(u8 data); +u8 recv_ec_data(void); +u8 ec_read(u8 addr); +int ec_write(u8 addr, u8 data); + +#endif + |