| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2012 The Chromium OS Authors. All rights reserved. |
| * |
| * 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. |
| */ |
| |
| #ifndef __PRE_RAM__ |
| |
| #include <console/console.h> |
| #include <device/device.h> |
| #include <device/pnp.h> |
| #include <arch/io.h> |
| #include <delay.h> |
| #include <pc80/keyboard.h> |
| #include "ec.h" |
| #include "chip.h" |
| |
| /* kbc helper functions from drivers/pc80/keyboard.c. TODO: share functions. */ |
| static int kbc_input_buffer_empty(void) |
| { |
| u32 timeout; |
| for (timeout = KBC_TIMEOUT_IN_MS; timeout && (inb(KBD_STATUS) & KBD_IBF); |
| timeout--) { |
| mdelay(1); |
| } |
| |
| if (!timeout) { |
| printk(BIOS_WARNING, |
| "Unexpected Keyboard controller input buffer full\n"); |
| } |
| return !!timeout; |
| } |
| |
| |
| static int kbc_output_buffer_full(void) |
| { |
| u32 timeout; |
| for (timeout = KBC_TIMEOUT_IN_MS; timeout && ((inb(KBD_STATUS) |
| & KBD_OBF) == 0); timeout--) { |
| mdelay(1); |
| } |
| |
| if (!timeout) { |
| printk(BIOS_INFO, "Keyboard controller output buffer result timeout\n"); |
| } |
| return !!timeout; |
| } |
| |
| int kbc_cleanup_buffers(void) |
| { |
| u32 timeout; |
| for (timeout = KBC_TIMEOUT_IN_MS; timeout && (inb(KBD_STATUS) |
| & (KBD_OBF | KBD_IBF)); timeout--) { |
| mdelay(1); |
| inb(KBD_DATA); |
| } |
| |
| if (!timeout) { |
| printk(BIOS_ERR, "Couldn't cleanup the keyboard controller buffers\n"); |
| printk(BIOS_ERR, "Status (0x%x): 0x%x, Buffer (0x%x): 0x%x\n", |
| KBD_STATUS, inb(KBD_STATUS), KBD_DATA, inb(KBD_DATA)); |
| } |
| |
| return !!timeout; |
| } |
| |
| |
| /* The ENE 60/64 EC registers are the same command/status IB/OB KBC pair. |
| * Check status from 64 port before each command. |
| * |
| * Ex. Get panel ID command C43/D77 |
| * Check IBF empty. Then Write 0x43(CMD) to 0x64 Port |
| * Check IBF empty. Then Write 0x77(DATA) to 0x60 Port |
| * Check OBF set. Then Get Data(0x03:panel ID) from 0x60 |
| * Different commands return may or may not respond and may have multiple |
| * bytes. Keep it simple for nor |
| */ |
| |
| u8 ec_kbc_read_ob(void) |
| { |
| if (!kbc_output_buffer_full()) return 0; |
| return inb(KBD_DATA); |
| } |
| |
| void ec_kbc_write_cmd(u8 cmd) |
| { |
| if (!kbc_input_buffer_empty()) return; |
| outb(cmd, KBD_COMMAND); |
| } |
| |
| void ec_kbc_write_ib(u8 data) |
| { |
| if (!kbc_input_buffer_empty()) return; |
| outb(data, KBD_DATA); |
| } |
| |
| |
| /* |
| * These functions are for accessing the ENE932 device space, but are not |
| * currently used. |
| */ |
| /* |
| static u8 ec_io_read(u16 addr) |
| { |
| outb(addr >> 8, EC_IO_HIGH); |
| outb(addr & 0xff, EC_IO_LOW); |
| return inb(EC_IO_DATA); |
| } |
| */ |
| /*static void ec_write(u16 addr, u8 data) |
| { |
| outb(addr >> 8, EC_IO_HIGH); |
| outb(addr & 0xff, EC_IO_LOW; |
| outb(data, EC_IO_DATA); |
| } |
| */ |
| |
| #ifndef __SMM__ |
| static void ene932_init(struct device *dev) |
| { |
| if (!dev->enabled) |
| return; |
| |
| printk(BIOS_DEBUG, "Compal ENE932: Initializing keyboard.\n"); |
| pc_keyboard_init(NO_AUX_DEVICE); |
| |
| } |
| |
| static struct device_operations ops = { |
| .init = ene932_init, |
| .read_resources = DEVICE_NOOP, |
| .enable_resources = DEVICE_NOOP, |
| }; |
| |
| static struct pnp_info pnp_dev_info[] = { |
| { NULL, 0, 0, 0, } |
| }; |
| |
| static void enable_dev(struct device *dev) |
| { |
| pnp_enable_devices(dev, &ops, ARRAY_SIZE(pnp_dev_info), pnp_dev_info); |
| } |
| |
| struct chip_operations ec_compal_ene932_ops = { |
| CHIP_NAME("COMPAL ENE932 EC") |
| .enable_dev = enable_dev |
| }; |
| #endif /* ! __SMM__ */ |
| #endif /* ! __PRE_RAM__ */ |