0,0 → 1,89 |
/* |
* 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 NS16550 port driver. |
*/ |
|
#include <ipc/ipc.h> |
#include <async.h> |
#include <sysinfo.h> |
#include <kbd.h> |
#include <kbd_port.h> |
#include <ddi.h> |
|
/* NS16550 registers */ |
#define RBR_REG 0 /** Receiver Buffer Register. */ |
#define IER_REG 1 /** Interrupt Enable Register. */ |
#define IIR_REG 2 /** Interrupt Ident Register (read). */ |
#define FCR_REG 2 /** FIFO control register (write). */ |
#define LCR_REG 3 /** Line Control register. */ |
#define MCR_REG 4 /** Modem Control Register. */ |
#define LSR_REG 5 /** Line Status Register. */ |
|
irq_cmd_t ns16550_cmds[1] = { |
{ CMD_PORT_READ_1, 0, 0, 2 }, |
}; |
|
irq_code_t ns16550_kbd = { |
1, |
ns16550_cmds |
}; |
|
static void ns16550_irq_handler(ipc_callid_t iid, ipc_call_t *call); |
|
uint16_t ns16550_port; |
|
int kbd_port_init(void) |
{ |
async_set_interrupt_received(ns16550_irq_handler); |
|
ns16550_port = sysinfo_value("kbd.port"); |
ns16550_kbd.cmds[0].addr = (void *) (ns16550_port + RBR_REG); |
ipc_register_irq(sysinfo_value("kbd.inr"), sysinfo_value("kbd.devno"), |
0, &ns16550_kbd); |
iospace_enable(task_get_id(), ns16550_port, 8); |
|
return 0; |
} |
|
#define LSR_DATA_READY 0x01 |
|
static void ns16550_irq_handler(ipc_callid_t iid, ipc_call_t *call) |
{ |
int scan_code = IPC_GET_ARG2(*call); |
kbd_push_scancode(scan_code); |
} |
|
/** |
* @} |
*/ |