| 0,0 → 1,169 |
|---|
| /* |
| * Copyright (c) 2001-2004 Jakub Jermar |
| * Copyright (c) 2006 Josef Cejka |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * - The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /** @addtogroup kbd_port |
| * @ingroup kbd |
| * @{ |
| */ |
| /** @file |
| * @brief i8042 port driver. |
| */ |
| |
| #include <ddi.h> |
| #include <libarch/ddi.h> |
| #include <ipc/ipc.h> |
| #include <async.h> |
| #include <unistd.h> |
| #include <sysinfo.h> |
| #include <kbd_port.h> |
| #include <kbd.h> |
| #include <ddi.h> |
| #include "i8042.h" |
| |
| /* Interesting bits for status register */ |
| #define i8042_OUTPUT_FULL 0x1 |
| #define i8042_INPUT_FULL 0x2 |
| #define i8042_MOUSE_DATA 0x20 |
| |
| /* Command constants */ |
| #define i8042_CMD_KBD 0x60 |
| #define i8042_CMD_MOUSE 0xd4 |
| |
| /* Keyboard cmd byte */ |
| #define i8042_KBD_IE 0x1 |
| #define i8042_MOUSE_IE 0x2 |
| #define i8042_KBD_DISABLE 0x10 |
| #define i8042_MOUSE_DISABLE 0x20 |
| #define i8042_KBD_TRANSLATE 0x40 |
| |
| /* Mouse constants */ |
| #define MOUSE_OUT_INIT 0xf4 |
| #define MOUSE_ACK 0xfa |
| |
| static irq_cmd_t i8042_cmds[] = { |
| { |
| .cmd = CMD_PIO_READ_8, |
| .addr = NULL, /* will be patched in run-time */ |
| .dstarg = 1 |
| }, |
| { |
| .cmd = CMD_BTEST, |
| .value = i8042_OUTPUT_FULL, |
| .srcarg = 1, |
| .dstarg = 3 |
| }, |
| { |
| .cmd = CMD_PREDICATE, |
| .value = 2, |
| .srcarg = 3 |
| }, |
| { |
| .cmd = CMD_PIO_READ_8, |
| .addr = NULL, /* will be patched in run-time */ |
| .dstarg = 2 |
| }, |
| { |
| .cmd = CMD_ACCEPT |
| } |
| }; |
| |
| static irq_code_t i8042_kbd = { |
| sizeof(i8042_cmds) / sizeof(irq_cmd_t), |
| i8042_cmds |
| }; |
| |
| static uintptr_t i8042_physical; |
| static uintptr_t i8042_kernel; |
| static i8042_t * i8042; |
| |
| static void wait_ready(void) { |
| while (pio_read_8(&i8042->status) & i8042_INPUT_FULL) |
| ; |
| } |
| |
| static void i8042_irq_handler(ipc_callid_t iid, ipc_call_t *call); |
| |
| int kbd_port_init(void) |
| { |
| int mouseenabled = 0; |
| void *vaddr; |
| |
| i8042_physical = sysinfo_value("kbd.address.physical"); |
| i8042_kernel = sysinfo_value("kbd.address.kernel"); |
| if (pio_enable((void *) i8042_physical, sizeof(i8042_t), &vaddr) != 0) |
| return -1; |
| i8042 = vaddr; |
| |
| async_set_interrupt_received(i8042_irq_handler); |
| |
| /* Disable kbd, enable mouse */ |
| pio_write_8(&i8042->status, i8042_CMD_KBD); |
| wait_ready(); |
| pio_write_8(&i8042->status, i8042_CMD_KBD); |
| wait_ready(); |
| pio_write_8(&i8042->data, i8042_KBD_DISABLE); |
| wait_ready(); |
| |
| /* Flush all current IO */ |
| while (pio_read_8(&i8042->status) & i8042_OUTPUT_FULL) |
| (void) pio_read_8(&i8042->data); |
| |
| /* Enable kbd */ |
| i8042_kbd.cmds[0].addr = &((i8042_t *) i8042_kernel)->status; |
| i8042_kbd.cmds[3].addr = &((i8042_t *) i8042_kernel)->data; |
| ipc_register_irq(sysinfo_value("kbd.inr"), device_assign_devno(), 0, &i8042_kbd); |
| |
| int newcontrol = i8042_KBD_IE | i8042_KBD_TRANSLATE; |
| if (mouseenabled) |
| newcontrol |= i8042_MOUSE_IE; |
| |
| pio_write_8(&i8042->status, i8042_CMD_KBD); |
| wait_ready(); |
| pio_write_8(&i8042->data, newcontrol); |
| wait_ready(); |
| |
| return 0; |
| } |
| |
| static void i8042_irq_handler(ipc_callid_t iid, ipc_call_t *call) |
| { |
| int status = IPC_GET_ARG1(*call); |
| |
| if ((status & i8042_MOUSE_DATA)) |
| return; |
| |
| int scan_code = IPC_GET_ARG2(*call); |
| |
| kbd_push_scancode(scan_code); |
| return; |
| } |
| |
| /** |
| * @} |
| */ |