| 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); |
| } |
| |
| /** |
| * @} |
| */ |