Rev 3924 | Rev 4070 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 3924 | svoboda | 1 | /* |
| 2 | * Copyright (c) 2008 Pavel Rimsky |
||
| 3 | * All rights reserved. |
||
| 4 | * |
||
| 5 | * Redistribution and use in source and binary forms, with or without |
||
| 6 | * modification, are permitted provided that the following conditions |
||
| 7 | * are met: |
||
| 8 | * |
||
| 9 | * - Redistributions of source code must retain the above copyright |
||
| 10 | * notice, this list of conditions and the following disclaimer. |
||
| 11 | * - Redistributions in binary form must reproduce the above copyright |
||
| 12 | * notice, this list of conditions and the following disclaimer in the |
||
| 13 | * documentation and/or other materials provided with the distribution. |
||
| 14 | * - The name of the author may not be used to endorse or promote products |
||
| 15 | * derived from this software without specific prior written permission. |
||
| 16 | * |
||
| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
||
| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
||
| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
||
| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
||
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
||
| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
||
| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
||
| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
||
| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
||
| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
||
| 27 | */ |
||
| 28 | |||
| 29 | /** @addtogroup kbd_port |
||
| 30 | * @ingroup kbd |
||
| 31 | * @{ |
||
| 32 | */ |
||
| 33 | /** @file |
||
| 34 | * @brief SGCN (Serengeti Console) keyboard port driver. |
||
| 35 | */ |
||
| 36 | |||
| 37 | #include <as.h> |
||
| 38 | #include <ddi.h> |
||
| 39 | #include <ipc/ipc.h> |
||
| 40 | #include <async.h> |
||
| 41 | #include <kbd.h> |
||
| 42 | #include <kbd_port.h> |
||
| 43 | #include <sysinfo.h> |
||
| 44 | #include <stdio.h> |
||
| 45 | |||
| 46 | /** |
||
| 47 | * SGCN buffer header. It is placed at the very beginning of the SGCN |
||
| 48 | * buffer. |
||
| 49 | */ |
||
| 50 | typedef struct { |
||
| 51 | /** hard-wired to "CON" */ |
||
| 52 | char magic[4]; |
||
| 53 | |||
| 54 | /** we don't need this */ |
||
| 55 | char unused[8]; |
||
| 56 | |||
| 57 | /** offset within the SGCN buffer of the input buffer start */ |
||
| 58 | uint32_t in_begin; |
||
| 59 | |||
| 60 | /** offset within the SGCN buffer of the input buffer end */ |
||
| 61 | uint32_t in_end; |
||
| 62 | |||
| 63 | /** offset within the SGCN buffer of the input buffer read pointer */ |
||
| 64 | uint32_t in_rdptr; |
||
| 65 | |||
| 66 | /** offset within the SGCN buffer of the input buffer write pointer */ |
||
| 67 | uint32_t in_wrptr; |
||
| 68 | } __attribute__ ((packed)) sgcn_buffer_header_t; |
||
| 69 | |||
| 70 | /* |
||
| 71 | * Returns a pointer to the object of a given type which is placed at the given |
||
| 72 | * offset from the console buffer beginning. |
||
| 73 | */ |
||
| 74 | #define SGCN_BUFFER(type, offset) \ |
||
| 75 | ((type *) (sram_virt_addr + sram_buffer_offset + (offset))) |
||
| 76 | |||
| 77 | /** Returns a pointer to the console buffer header. */ |
||
| 78 | #define SGCN_BUFFER_HEADER (SGCN_BUFFER(sgcn_buffer_header_t, 0)) |
||
| 79 | |||
| 80 | /** |
||
| 81 | * Virtual address mapped to SRAM. |
||
| 82 | */ |
||
| 83 | static uintptr_t sram_virt_addr; |
||
| 84 | |||
| 85 | /** |
||
| 86 | * SGCN buffer offset within SGCN. |
||
| 87 | */ |
||
| 88 | static uintptr_t sram_buffer_offset; |
||
| 89 | |||
| 90 | static void sgcn_irq_handler(ipc_callid_t iid, ipc_call_t *call); |
||
| 91 | |||
| 92 | |||
| 93 | /** |
||
| 94 | * Initializes the SGCN driver. |
||
| 95 | * Maps the physical memory (SRAM) and registers the interrupt. |
||
| 96 | */ |
||
| 97 | int kbd_port_init(void) |
||
| 98 | { |
||
| 99 | async_set_interrupt_received(sgcn_irq_handler); |
||
| 100 | sram_virt_addr = (uintptr_t) as_get_mappable_page(sysinfo_value("sram.area.size")); |
||
| 101 | if (physmem_map((void *) sysinfo_value("sram.address.physical"), |
||
| 102 | (void *) sram_virt_addr, sysinfo_value("sram.area.size") / PAGE_SIZE, |
||
| 103 | AS_AREA_READ | AS_AREA_WRITE) != 0) { |
||
| 104 | printf("SGCN: uspace driver could not map physical memory."); |
||
| 105 | return -1; |
||
| 106 | } |
||
| 107 | |||
| 108 | sram_buffer_offset = sysinfo_value("sram.buffer.offset"); |
||
| 109 | ipc_register_irq(sysinfo_value("kbd.inr"), sysinfo_value("kbd.devno"), |
||
| 110 | 0, (void *) 0); |
||
| 111 | return 0; |
||
| 112 | } |
||
| 113 | |||
| 114 | /** |
||
| 115 | * Handler of the "key pressed" event. Reads codes of all the pressed keys from |
||
| 116 | * the buffer. |
||
| 117 | */ |
||
| 118 | static void sgcn_irq_handler(ipc_callid_t iid, ipc_call_t *call) |
||
| 119 | { |
||
| 120 | char c; |
||
| 121 | |||
| 122 | uint32_t begin = SGCN_BUFFER_HEADER->in_begin; |
||
| 123 | uint32_t end = SGCN_BUFFER_HEADER->in_end; |
||
| 124 | uint32_t size = end - begin; |
||
| 125 | |||
| 126 | volatile char *buf_ptr = (volatile char *) |
||
| 127 | SGCN_BUFFER(char, SGCN_BUFFER_HEADER->in_rdptr); |
||
| 128 | volatile uint32_t *in_wrptr_ptr = &(SGCN_BUFFER_HEADER->in_wrptr); |
||
| 129 | volatile uint32_t *in_rdptr_ptr = &(SGCN_BUFFER_HEADER->in_rdptr); |
||
| 130 | |||
| 131 | while (*in_rdptr_ptr != *in_wrptr_ptr) { |
||
| 132 | c = *buf_ptr; |
||
| 133 | *in_rdptr_ptr = (((*in_rdptr_ptr) - begin + 1) % size) + begin; |
||
| 134 | buf_ptr = (volatile char *) |
||
| 135 | SGCN_BUFFER(char, SGCN_BUFFER_HEADER->in_rdptr); |
||
| 136 | kbd_push_scancode(c); |
||
| 137 | } |
||
| 138 | } |
||
| 139 | |||
| 140 | /** @} |
||
| 141 | */ |