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| Rev | Author | Line No. | Line |
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| 3969 | jermar | 1 | /* |
| 2 | * Copyright (c) 2009 Jakub Jermar |
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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 fhc |
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| 30 | * @{ |
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| 31 | */ |
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| 32 | |||
| 33 | /** |
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| 34 | * @file fhc.c |
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| 35 | * @brief FHC bus driver. |
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| 36 | */ |
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| 37 | |||
| 38 | #include <ipc/ipc.h> |
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| 39 | #include <ipc/services.h> |
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| 40 | #include <ipc/bus.h> |
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| 41 | #include <ipc/ns.h> |
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| 42 | #include <sysinfo.h> |
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| 43 | #include <as.h> |
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| 44 | #include <ddi.h> |
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| 45 | #include <align.h> |
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| 46 | #include <bool.h> |
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| 47 | #include <errno.h> |
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| 48 | #include <async.h> |
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| 49 | #include <align.h> |
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| 50 | #include <async.h> |
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| 51 | #include <stdio.h> |
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| 52 | #include <ipc/devmap.h> |
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| 53 | |||
| 54 | #define NAME "fhc" |
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| 55 | |||
| 56 | #define FHC_UART_INR 0x39 |
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| 57 | |||
| 58 | #define FHC_UART_IMAP 0x0 |
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| 59 | #define FHC_UART_ICLR 0x4 |
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| 60 | |||
| 61 | static void *fhc_uart_phys; |
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| 62 | static volatile uint32_t *fhc_uart_virt; |
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| 63 | static size_t fhc_uart_size; |
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| 64 | |||
| 65 | /** Handle one connection to ramdisk. |
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| 66 | * |
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| 67 | * @param iid Hash of the request that opened the connection. |
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| 68 | * @param icall Call data of the request that opened the connection. |
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| 69 | */ |
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| 70 | static void fhc_connection(ipc_callid_t iid, ipc_call_t *icall) |
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| 71 | { |
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| 72 | ipc_callid_t callid; |
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| 73 | ipc_call_t call; |
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| 74 | |||
| 75 | /* |
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| 76 | * Answer the first IPC_M_CONNECT_ME_TO call. |
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| 77 | */ |
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| 78 | ipc_answer_0(iid, EOK); |
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| 79 | |||
| 80 | while (1) { |
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| 81 | int inr; |
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| 82 | |||
| 83 | callid = async_get_call(&call); |
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| 84 | switch (IPC_GET_METHOD(call)) { |
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| 85 | case BUS_CLEAR_INTERRUPT: |
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| 86 | inr = IPC_GET_ARG1(call); |
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| 87 | switch (inr) { |
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| 88 | case FHC_UART_INR: |
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| 89 | fhc_uart_virt[FHC_UART_ICLR] = 0; |
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| 90 | ipc_answer_0(callid, EOK); |
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| 91 | break; |
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| 92 | default: |
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| 93 | ipc_answer_0(callid, ENOTSUP); |
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| 94 | break; |
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| 95 | } |
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| 96 | break; |
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| 97 | default: |
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| 98 | ipc_answer_0(callid, EINVAL); |
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| 99 | break; |
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| 100 | } |
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| 101 | } |
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| 102 | } |
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| 103 | |||
| 104 | /** Initialize the FHC driver. |
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| 105 | * |
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| 106 | * So far, the driver heavily depends on information provided by the kernel via |
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| 107 | * sysinfo. In the future, there should be a standalone FHC driver. |
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| 108 | */ |
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| 109 | static bool fhc_init(void) |
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| 110 | { |
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| 111 | ipcarg_t phonead; |
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| 112 | |||
| 113 | fhc_uart_size = sysinfo_value("fhc.uart.size"); |
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| 114 | fhc_uart_phys = (void *) sysinfo_value("fhc.uart.physical"); |
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| 115 | |||
| 116 | if (!fhc_uart_size) { |
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| 117 | printf(NAME ": no FHC UART registers found\n"); |
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| 118 | return false; |
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| 119 | } |
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| 120 | |||
| 121 | fhc_uart_virt = as_get_mappable_page(fhc_uart_size); |
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| 122 | |||
| 123 | int flags = AS_AREA_READ | AS_AREA_WRITE; |
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| 124 | int retval = physmem_map(fhc_uart_phys, (void *) fhc_uart_virt, |
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| 125 | ALIGN_UP(fhc_uart_size, PAGE_SIZE) >> PAGE_WIDTH, flags); |
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| 126 | |||
| 127 | if (retval < 0) { |
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| 128 | printf(NAME ": Error mapping FHC UART registers\n"); |
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| 129 | return false; |
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| 130 | } |
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| 131 | |||
| 132 | printf(NAME ": FHC UART registers at %p, %d bytes\n", fhc_uart_phys, |
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| 133 | fhc_uart_size); |
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| 134 | |||
| 135 | async_set_client_connection(fhc_connection); |
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| 136 | ipc_connect_to_me(PHONE_NS, SERVICE_FHC, 0, 0, &phonead); |
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| 137 | |||
| 138 | return true; |
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| 139 | } |
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| 140 | |||
| 141 | int main(int argc, char **argv) |
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| 142 | { |
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| 143 | printf(NAME ": HelenOS FHC bus driver\n"); |
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| 144 | |||
| 145 | if (!fhc_init()) |
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| 146 | return -1; |
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| 147 | |||
| 148 | printf(NAME ": Accepting connections\n"); |
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| 149 | async_manager(); |
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| 150 | |||
| 151 | /* Never reached */ |
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| 152 | return 0; |
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| 153 | } |
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| 154 | |||
| 155 | /** |
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| 156 | * @} |
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| 157 | */ |