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| 3924 | svoboda | 1 | /* |
| 2 | * Copyright (c) 2006 Josef Cejka |
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| 3 | * All rights reserved. |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * |
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| 9 | * - Redistributions of source code must retain the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer. |
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| 11 | * - Redistributions in binary form must reproduce the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer in the |
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| 13 | * documentation and/or other materials provided with the distribution. |
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| 14 | * - The name of the author may not be used to endorse or promote products |
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| 15 | * derived from this software without specific prior written permission. |
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| 16 | * |
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 27 | */ |
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| 28 | |||
| 29 | /** @addtogroup kbd_port |
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| 30 | * @ingroup kbd |
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| 31 | * @{ |
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| 32 | */ |
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| 33 | /** @file |
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| 34 | * @brief NS16550 port driver. |
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| 35 | */ |
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| 36 | |||
| 37 | #include <ipc/ipc.h> |
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| 38 | #include <async.h> |
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| 39 | #include <sysinfo.h> |
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| 40 | #include <kbd.h> |
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| 41 | #include <kbd_port.h> |
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| 42 | #include <ddi.h> |
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| 43 | |||
| 44 | /* NS16550 registers */ |
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| 45 | #define RBR_REG 0 /** Receiver Buffer Register. */ |
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| 46 | #define IER_REG 1 /** Interrupt Enable Register. */ |
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| 47 | #define IIR_REG 2 /** Interrupt Ident Register (read). */ |
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| 48 | #define FCR_REG 2 /** FIFO control register (write). */ |
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| 49 | #define LCR_REG 3 /** Line Control register. */ |
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| 50 | #define MCR_REG 4 /** Modem Control Register. */ |
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| 51 | #define LSR_REG 5 /** Line Status Register. */ |
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| 52 | |||
| 53 | irq_cmd_t ns16550_cmds[1] = { |
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| 54 | { CMD_PORT_READ_1, 0, 0, 2 }, |
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| 55 | }; |
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| 56 | |||
| 57 | irq_code_t ns16550_kbd = { |
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| 58 | 1, |
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| 59 | ns16550_cmds |
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| 60 | }; |
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| 61 | |||
| 62 | static void ns16550_irq_handler(ipc_callid_t iid, ipc_call_t *call); |
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| 63 | |||
| 64 | uint16_t ns16550_port; |
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| 65 | |||
| 66 | int kbd_port_init(void) |
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| 67 | { |
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| 68 | async_set_interrupt_received(ns16550_irq_handler); |
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| 69 | |||
| 70 | ns16550_port = sysinfo_value("kbd.port"); |
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| 71 | ns16550_kbd.cmds[0].addr = (void *) (ns16550_port + RBR_REG); |
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| 72 | ipc_register_irq(sysinfo_value("kbd.inr"), sysinfo_value("kbd.devno"), |
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| 73 | 0, &ns16550_kbd); |
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| 74 | iospace_enable(task_get_id(), ns16550_port, 8); |
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| 75 | |||
| 76 | return 0; |
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| 77 | } |
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| 78 | |||
| 79 | #define LSR_DATA_READY 0x01 |
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| 80 | |||
| 81 | static void ns16550_irq_handler(ipc_callid_t iid, ipc_call_t *call) |
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| 82 | { |
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| 83 | int scan_code = IPC_GET_ARG2(*call); |
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| 84 | kbd_push_scancode(scan_code); |
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| 85 | } |
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| 86 | |||
| 87 | /** |
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| 88 | * @} |
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| 89 | */ |