0,0 → 1,177 |
/* |
* 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; |
} |
|
void kbd_port_yield(void) |
{ |
} |
|
void kbd_port_reclaim(void) |
{ |
} |
|
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; |
} |
|
/** |
* @} |
*/ |