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| Rev | Author | Line No. | Line |
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| 3743 | rimsky | 1 | /* |
| 2 | * Copyright (c) 2008 Pavel Rimsky |
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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 sparc64 |
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| 30 | * @{ |
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| 31 | */ |
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| 32 | /** |
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| 33 | * @file |
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| 34 | * @brief Niagara input/output driver based on hypervisor calls. |
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| 35 | */ |
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| 36 | |||
| 37 | #include <arch/drivers/niagara.h> |
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| 38 | #include <console/chardev.h> |
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| 39 | #include <console/console.h> |
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| 3817 | rimsky | 40 | #include <arch/drivers/kbd.h> |
| 3743 | rimsky | 41 | #include <arch/sun4v/hypercall.h> |
| 42 | |||
| 43 | /* functions referenced from definitions of I/O operations structures */ |
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| 44 | static void niagara_putchar(chardev_t *, const char); |
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| 3817 | rimsky | 45 | static void niagara_noop(chardev_t *); |
| 46 | static char niagara_read(chardev_t *); |
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| 3743 | rimsky | 47 | |
| 48 | /** character device operations */ |
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| 49 | static chardev_operations_t niagara_ops = { |
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| 3817 | rimsky | 50 | .write = niagara_putchar, |
| 51 | .suspend = niagara_noop, |
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| 52 | .resume = niagara_noop, |
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| 53 | .read = niagara_read |
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| 3743 | rimsky | 54 | }; |
| 55 | |||
| 56 | /** Niagara character device */ |
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| 57 | chardev_t niagara_io; |
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| 58 | |||
| 3817 | rimsky | 59 | /** defined in drivers/kbd.c */ |
| 60 | extern kbd_type_t kbd_type; |
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| 61 | |||
| 3743 | rimsky | 62 | /** Writes a single character to the standard output. */ |
| 3863 | rimsky | 63 | static inline void do_putchar(const char c) { |
| 64 | /* repeat until the buffer is non-full */ |
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| 65 | while (__hypercall_fast1(CONS_PUTCHAR, c) == EWOULDBLOCK) |
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| 66 | ; |
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| 67 | } |
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| 68 | |||
| 69 | /** Writes a single character to the standard output. */ |
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| 3743 | rimsky | 70 | static void niagara_putchar(struct chardev * cd, const char c) |
| 71 | { |
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| 3863 | rimsky | 72 | do_putchar(c); |
| 3743 | rimsky | 73 | if (c == '\n') |
| 3863 | rimsky | 74 | do_putchar('\r'); |
| 3743 | rimsky | 75 | } |
| 76 | |||
| 77 | /** |
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| 78 | * Grabs the input for kernel. |
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| 79 | */ |
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| 80 | void niagara_grab(void) |
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| 81 | { |
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| 82 | } |
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| 83 | |||
| 84 | /** |
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| 85 | * Releases the input so that userspace can use it. |
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| 86 | */ |
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| 87 | void niagara_release(void) |
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| 88 | { |
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| 89 | } |
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| 90 | |||
| 91 | /** |
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| 3817 | rimsky | 92 | * Default suspend/resume operation for the input device. |
| 93 | */ |
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| 94 | static void niagara_noop(chardev_t *d) |
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| 95 | { |
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| 96 | } |
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| 97 | |||
| 98 | /** |
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| 99 | * Called when actively reading the character. Not implemented yet. |
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| 100 | */ |
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| 101 | static char niagara_read(chardev_t *d) |
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| 102 | { |
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| 103 | return (char) 0; |
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| 104 | } |
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| 105 | |||
| 106 | /** |
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| 107 | * Function regularly called by the keyboard polling thread. Asks the |
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| 108 | * hypervisor whether there is any unread character. If so, it picks it up |
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| 109 | * and sends it to the upper layers of HelenOS. |
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| 110 | */ |
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| 111 | void niagara_poll(void) |
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| 112 | { |
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| 113 | uint64_t c = 50; |
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| 114 | |||
| 115 | if (__hypercall_fast_ret1(0, 0, 0, 0, 0, CONS_GETCHAR, &c) == EOK) { |
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| 116 | chardev_push_character(&niagara_io, c); |
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| 117 | if (c == '\r') |
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| 118 | chardev_push_character(&niagara_io, '\n'); |
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| 119 | } |
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| 120 | |||
| 121 | } |
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| 122 | |||
| 123 | /** |
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| 3743 | rimsky | 124 | * Initializes the input/output subsystem so that the Niagara standard |
| 125 | * input/output is used. |
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| 126 | */ |
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| 127 | void niagara_init(void) |
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| 128 | { |
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| 3817 | rimsky | 129 | kbd_type = KBD_SUN4V; |
| 130 | |||
| 3743 | rimsky | 131 | chardev_initialize("niagara_io", &niagara_io, &niagara_ops); |
| 132 | stdin = &niagara_io; |
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| 133 | stdout = &niagara_io; |
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| 134 | } |
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| 135 | |||
| 136 | /** @} |
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| 137 | */ |