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Diffstat (limited to 'src/pc80/keyboard.c')
-rw-r--r-- | src/pc80/keyboard.c | 306 |
1 files changed, 0 insertions, 306 deletions
diff --git a/src/pc80/keyboard.c b/src/pc80/keyboard.c deleted file mode 100644 index e0a6643334..0000000000 --- a/src/pc80/keyboard.c +++ /dev/null @@ -1,306 +0,0 @@ -/* - * This file is part of the coreboot project. - * - * Copyright (C) 2009 coresystems GmbH - * Copyright (C) 2008 Advanced Micro Devices, Inc. - * Copyright (C) 2003 Ollie Lo <ollielo@hotmail.com> - * - * 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 <pc80/keyboard.h> -#include <device/device.h> -#include <arch/io.h> -#include <delay.h> - -#define KBD_DATA 0x60 -#define KBD_COMMAND 0x64 -#define KBD_STATUS 0x64 -#define KBD_IBF (1 << 1) // 1: input buffer full (data ready for ec) -#define KBD_OBF (1 << 0) // 1: output buffer full (data ready for host) - -// Keyboard Controller Commands -#define KBC_CMD_READ_COMMAND 0x20 // Read command byte -#define KBC_CMD_WRITE_COMMAND 0x60 // Write command byte -#define KBC_CMD_SELF_TEST 0xAA // Controller self-test -#define KBC_CMD_KBD_TEST 0xAB // Keyboard Interface test - -/* The Keyboard controller command byte - * BIT | Description - * ----+------------------------------------------------------- - * 7 | reserved, must be zero - * 6 | XT Translation, (1 = on, 0 = off) - * 5 | Disable Mouse Port (1 = disable, 0 = enable) - * 4 | Disable Keyboard Port (1 = disable, 0 = enable) - * 3 | reserved, must be zero - * 2 | System Flag (1 = self-test passed. DO NOT SET TO ZERO) - * 1 | Mouse Port Interrupts (1 = enable, 0 = disable) - * 0 | Keyboard Port Interrupts (1 = enable, 0 = disable) - */ - -// Keyboard Controller Replies -#define KBC_REPLY_SELFTEST_OK 0x55 // controller self-test succeeded - -// -// Keyboard Replies -// -#define KBD_REPLY_POR 0xAA // Power on reset -#define KBD_REPLY_ACK 0xFA // Command ACK -#define KBD_REPLY_RESEND 0xFE // Command NACK, send command again - -/* Wait 400ms for keyboard controller answers */ -#define KBC_TIMEOUT_IN_MS 400 - -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; -} - - -static 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; -} - -static int kbc_self_test(void) -{ - u8 self_test; - - /* Clean up any junk that might have been in the KBC. - * Both input and output buffers must be empty. - */ - if (!kbc_cleanup_buffers()) - return 0; - - /* reset/self test 8042 - send cmd 0xAA */ - outb(KBC_CMD_SELF_TEST, KBD_COMMAND); - - if (!kbc_output_buffer_full()) { - /* There probably is no keyboard controller. */ - printk(BIOS_ERR, "Could not reset keyboard controller.\n"); - return 0; - } - - /* read self-test result, 0x55 is returned in the output buffer */ - self_test = inb(KBD_DATA); - - if (self_test != 0x55) { - printk(BIOS_ERR, "Keyboard Controller self-test failed: 0x%x\n", - self_test); - return 0; - } - - /* ensure the buffers are empty */ - kbc_cleanup_buffers(); - - /* keyboard interface test */ - outb(KBC_CMD_KBD_TEST, KBD_COMMAND); - - if (!kbc_output_buffer_full()) { - printk(BIOS_ERR, "Keyboard Interface test timed out.\n"); - return 0; - } - - /* read test result, 0x00 should be returned in case of no failures */ - self_test = inb(KBD_DATA); - - if (self_test != 0x00) { - printk(BIOS_ERR, "Keyboard Interface test failed: 0x%x\n", - self_test); - return 0; - } - - return 1; -} - -static u8 send_keyboard(u8 command) -{ - u8 regval = 0; - u8 resend = 10; - - do { - if (!kbc_input_buffer_empty()) return 0; - outb(command, KBD_DATA); - /* the reset command takes much longer then normal commands and - * even worse, some keyboards do send the ACK _after_ doing the - * reset */ - if (command == 0xFF) { - u8 retries; - for (retries = 9; retries && !kbc_output_buffer_full(); retries--) - ; - } - if (!kbc_output_buffer_full()) { - printk(BIOS_ERR, "Could not send keyboard command %02x\n", - command); - return 0; - } - regval = inb(KBD_DATA); - --resend; - } while (regval == KBD_REPLY_RESEND && resend > 0); - - return regval; -} - -void pc_keyboard_init(struct pc_keyboard *keyboard) -{ - u8 retries; - u8 regval; - if (!CONFIG_DRIVERS_PS2_KEYBOARD) - return; - printk(BIOS_DEBUG, "Keyboard init...\n"); - - /* Run a keyboard controller self-test */ - if (!kbc_self_test()) - return; - - /* Enable keyboard interface - No IRQ */ - if (!kbc_input_buffer_empty()) return; - outb(0x60, KBD_COMMAND); - if (!kbc_input_buffer_empty()) return; - outb(0x20, KBD_DATA); /* send cmd: enable keyboard */ - if (!kbc_input_buffer_empty()) { - printk(BIOS_INFO, "Timeout while enabling keyboard\n"); - return; - } - - /* clean up any junk that might have been in the keyboard */ - if (!kbc_cleanup_buffers()) return; - - /* reset keyboard and self test (keyboard side) */ - regval = send_keyboard(0xFF); - if (regval == KBD_REPLY_RESEND) { - /* keeps sending RESENDs, probably no keyboard. */ - printk(BIOS_INFO, "No PS/2 keyboard detected.\n"); - return; - } - - if (regval != KBD_REPLY_ACK) { - printk(BIOS_ERR, "Keyboard reset failed ACK: 0x%x\n", regval); - return; - } - - /* the reset command takes some time, so wait a little longer */ - for (retries = 9; retries && !kbc_output_buffer_full(); retries--) - ; - - if (!kbc_output_buffer_full()) { - printk(BIOS_ERR, "Timeout waiting for keyboard after reset.\n"); - return; - } - - regval = inb(KBD_DATA); - if (regval != 0xAA) { - printk(BIOS_ERR, "Keyboard reset selftest failed: 0x%x\n", regval); - return; - } - - /* - * The following set scancode stuff is what normal BIOS do. It could be - * argued that coreboot shouldn't set the scan code..... - */ - - /* disable the keyboard */ - regval = send_keyboard(0xF5); - if (regval != KBD_REPLY_ACK) { - printk(BIOS_ERR, "Keyboard disable failed ACK: 0x%x\n", regval); - return; - } - - /* Set scancode command */ - regval = send_keyboard(0xF0); - if (regval != KBD_REPLY_ACK) { - printk(BIOS_ERR, "Keyboard set scancode cmd failed ACK: 0x%x\n", regval); - return; - } - /* Set scancode mode 2 */ - regval = send_keyboard(0x02); - if (regval != KBD_REPLY_ACK) { - printk(BIOS_ERR, "Keyboard set scancode mode failed ACK: 0x%x\n", regval); - return; - } - - /* All is well - enable keyboard interface */ - if (!kbc_input_buffer_empty()) return; - outb(0x60, KBD_COMMAND); - if (!kbc_input_buffer_empty()) return; - outb(0x65, KBD_DATA); /* send cmd: enable keyboard and IRQ 1 */ - if (!kbc_input_buffer_empty()) { - printk(BIOS_ERR, "Timeout during keyboard enable\n"); - return; - } - - /* enable the keyboard */ - regval = send_keyboard(0xF4); - if (regval != KBD_REPLY_ACK) { - printk(BIOS_ERR, "Keyboard enable failed ACK: 0x%x\n", regval); - return; - } -} - -/* - * Support PS/2 mode - oddball SIOs(KBC) need this setup - * Not well documented. Google - 0xcb keyboard controller - * This is called before pc_keyboard_init(). - */ -void set_kbc_ps2_mode(void) -{ - /* Run a keyboard controller self-test */ - if (!kbc_self_test()) - return; - - /* Support PS/2 mode */ - if (!kbc_input_buffer_empty()) return; - outb(0xcb, KBD_COMMAND); - - if (!kbc_input_buffer_empty()) return; - outb(0x01, KBD_DATA); - - kbc_cleanup_buffers(); -} |