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| Rev | Author | Line No. | Line |
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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 | |||
| 3954 | jermar | 53 | #define LSR_DATA_READY 0x01 |
| 54 | |||
| 55 | static irq_cmd_t ns16550_cmds[] = { |
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| 56 | { |
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| 57 | .cmd = CMD_PIO_READ_8, |
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| 58 | .addr = (void *) 0, /* will be patched in run-time */ |
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| 59 | .dstarg = 1 |
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| 60 | }, |
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| 61 | { |
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| 62 | .cmd = CMD_BTEST, |
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| 63 | .value = LSR_DATA_READY, |
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| 64 | .srcarg = 1, |
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| 65 | .dstarg = 3 |
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| 66 | }, |
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| 67 | { |
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| 68 | .cmd = CMD_PREDICATE, |
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| 69 | .value = 2, |
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| 70 | .srcarg = 3 |
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| 71 | }, |
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| 72 | { |
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| 73 | .cmd = CMD_PIO_READ_8, |
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| 74 | .addr = (void *) 0, /* will be patched in run-time */ |
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| 75 | .dstarg = 2 |
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| 76 | }, |
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| 77 | { |
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| 78 | .cmd = CMD_ACCEPT |
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| 79 | } |
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| 3924 | svoboda | 80 | }; |
| 81 | |||
| 82 | irq_code_t ns16550_kbd = { |
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| 3954 | jermar | 83 | sizeof(ns16550_cmds) / sizeof(irq_cmd_t), |
| 3924 | svoboda | 84 | ns16550_cmds |
| 85 | }; |
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| 86 | |||
| 87 | static void ns16550_irq_handler(ipc_callid_t iid, ipc_call_t *call); |
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| 88 | |||
| 4026 | jermar | 89 | static uintptr_t ns16550_physical; |
| 90 | static uintptr_t ns16550_kernel; |
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| 3924 | svoboda | 91 | |
| 92 | int kbd_port_init(void) |
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| 93 | { |
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| 4026 | jermar | 94 | void *vaddr; |
| 95 | |||
| 3924 | svoboda | 96 | async_set_interrupt_received(ns16550_irq_handler); |
| 97 | |||
| 4026 | jermar | 98 | ns16550_physical = sysinfo_value("kbd.address.physical"); |
| 99 | ns16550_kernel = sysinfo_value("kbd.address.kernel"); |
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| 100 | ns16550_kbd.cmds[0].addr = (void *) (ns16550_kernel + LSR_REG); |
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| 101 | ns16550_kbd.cmds[3].addr = (void *) (ns16550_kernel + RBR_REG); |
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| 4148 | decky | 102 | ipc_register_irq(sysinfo_value("kbd.inr"), device_assign_devno(), |
| 3924 | svoboda | 103 | 0, &ns16550_kbd); |
| 4026 | jermar | 104 | return pio_enable((void *) ns16550_physical, 8, &vaddr); |
| 3924 | svoboda | 105 | } |
| 106 | |||
| 107 | static void ns16550_irq_handler(ipc_callid_t iid, ipc_call_t *call) |
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| 108 | { |
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| 109 | int scan_code = IPC_GET_ARG2(*call); |
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| 110 | kbd_push_scancode(scan_code); |
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| 111 | } |
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| 112 | |||
| 113 | /** |
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| 114 | * @} |
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| 115 | */ |