The Android Open Source Project | 8b23a6c | 2009-03-03 19:30:32 -0800 | [diff] [blame] | 1 | /* Copyright (C) 2007-2008 The Android Open Source Project |
| 2 | ** |
| 3 | ** This software is licensed under the terms of the GNU General Public |
| 4 | ** License version 2, as published by the Free Software Foundation, and |
| 5 | ** may be copied, distributed, and modified under those terms. |
| 6 | ** |
| 7 | ** This program is distributed in the hope that it will be useful, |
| 8 | ** but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 9 | ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 10 | ** GNU General Public License for more details. |
| 11 | */ |
| 12 | /* implement the modem character device for Android within the QEMU event loop. |
| 13 | * it communicates through a serial port with "rild" (Radio Interface Layer Daemon) |
| 14 | * on the emulated device. |
| 15 | */ |
| 16 | #include "modem_driver.h" |
| 17 | #include "qemu-char.h" |
| 18 | |
| 19 | #define xxDEBUG |
| 20 | |
| 21 | #ifdef DEBUG |
| 22 | # include <stdio.h> |
| 23 | # define D(...) ( fprintf( stderr, __VA_ARGS__ ) ) |
| 24 | #else |
| 25 | # define D(...) ((void)0) |
| 26 | #endif |
| 27 | |
| 28 | AModem android_modem; |
| 29 | CharDriverState* android_modem_cs; |
| 30 | |
| 31 | typedef struct { |
| 32 | CharDriverState* cs; |
| 33 | AModem modem; |
| 34 | char in_buff[ 1024 ]; |
| 35 | int in_pos; |
| 36 | int in_sms; |
| 37 | } ModemDriver; |
| 38 | |
| 39 | /* send unsollicited messages to the device */ |
| 40 | static void |
| 41 | modem_driver_unsol( void* _md, const char* message) |
| 42 | { |
| 43 | ModemDriver* md = _md; |
| 44 | int len = strlen(message); |
| 45 | |
| 46 | qemu_chr_write(md->cs, (const uint8_t*)message, len); |
| 47 | } |
| 48 | |
| 49 | static int |
| 50 | modem_driver_can_read( void* _md ) |
| 51 | { |
| 52 | ModemDriver* md = _md; |
| 53 | int ret = sizeof(md->in_buff) - md->in_pos; |
| 54 | |
| 55 | return ret; |
| 56 | } |
| 57 | |
| 58 | /* despite its name, this function is called when the device writes to the modem */ |
| 59 | static void |
| 60 | modem_driver_read( void* _md, const uint8_t* src, int len ) |
| 61 | { |
| 62 | ModemDriver* md = _md; |
| 63 | const uint8_t* end = src + len; |
| 64 | int nn; |
| 65 | |
| 66 | D( "%s: reading %d from %p bytes:", __FUNCTION__, len, src ); |
| 67 | for (nn = 0; nn < len; nn++) { |
| 68 | int c = src[nn]; |
| 69 | if (c >= 32 && c < 127) |
| 70 | D( "%c", c ); |
| 71 | else if (c == '\n') |
| 72 | D( "<LF>" ); |
| 73 | else if (c == '\r') |
| 74 | D( "<CR>" ); |
| 75 | else |
| 76 | D( "\\x%02x", c ); |
| 77 | } |
| 78 | D( "\n" ); |
| 79 | |
| 80 | for ( ; src < end; src++ ) { |
| 81 | char c = src[0]; |
| 82 | |
| 83 | if (md->in_sms) { |
| 84 | if (c != 26) |
| 85 | goto AppendChar; |
| 86 | |
| 87 | md->in_buff[ md->in_pos ] = c; |
| 88 | md->in_pos++; |
| 89 | md->in_sms = 0; |
| 90 | c = '\n'; |
| 91 | } |
| 92 | |
| 93 | if (c == '\n' || c == '\r') { |
| 94 | const char* answer; |
| 95 | |
| 96 | if (md->in_pos == 0) /* skip empty lines */ |
| 97 | continue; |
| 98 | |
| 99 | md->in_buff[ md->in_pos ] = 0; |
| 100 | md->in_pos = 0; |
| 101 | |
| 102 | D( "%s: << %s\n", __FUNCTION__, md->in_buff ); |
| 103 | answer = amodem_send(android_modem, md->in_buff); |
| 104 | if (answer != NULL) { |
| 105 | D( "%s: >> %s\n", __FUNCTION__, answer ); |
| 106 | len = strlen(answer); |
| 107 | if (len == 2 && answer[0] == '>' && answer[1] == ' ') |
| 108 | md->in_sms = 1; |
| 109 | |
| 110 | qemu_chr_write(md->cs, (const uint8_t*)answer, len); |
| 111 | qemu_chr_write(md->cs, (const uint8_t*)"\r", 1); |
| 112 | } else |
| 113 | D( "%s: -- NO ANSWER\n", __FUNCTION__ ); |
| 114 | |
| 115 | continue; |
| 116 | } |
| 117 | AppendChar: |
| 118 | md->in_buff[ md->in_pos++ ] = c; |
| 119 | if (md->in_pos == sizeof(md->in_buff)) { |
| 120 | /* input is too long !! */ |
| 121 | md->in_pos = 0; |
| 122 | } |
| 123 | } |
| 124 | D( "%s: done\n", __FUNCTION__ ); |
| 125 | } |
| 126 | |
| 127 | |
| 128 | static void |
| 129 | modem_driver_init( int base_port, ModemDriver* dm, CharDriverState* cs ) |
| 130 | { |
| 131 | dm->cs = cs; |
| 132 | dm->in_pos = 0; |
| 133 | dm->in_sms = 0; |
| 134 | dm->modem = amodem_create( base_port, modem_driver_unsol, dm ); |
| 135 | |
| 136 | qemu_chr_add_handlers( cs, modem_driver_can_read, modem_driver_read, NULL, dm ); |
| 137 | } |
| 138 | |
| 139 | |
| 140 | void android_modem_init( int base_port ) |
| 141 | { |
| 142 | static ModemDriver modem_driver[1]; |
| 143 | |
| 144 | if (android_modem_cs != NULL) { |
| 145 | modem_driver_init( base_port, modem_driver, android_modem_cs ); |
| 146 | android_modem = modem_driver->modem; |
| 147 | } |
| 148 | } |