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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 | /* suncore.c * * Common SUN serial routines. Based entirely * upon drivers/sbus/char/sunserial.c which is: * * Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be) * * Adaptation to new UART layer is: * * Copyright (C) 2002 David S. Miller (davem@redhat.com) */ #include <linux/config.h> #include <linux/module.h> #include <linux/kernel.h> #include <linux/console.h> #include <linux/tty.h> #include <linux/errno.h> #include <linux/string.h> #include <linux/init.h> #include <asm/oplib.h> #include "suncore.h" int sunserial_current_minor = 64; EXPORT_SYMBOL(sunserial_current_minor); void sunserial_console_termios(struct console *con) { char mode[16], buf[16], *s; char *mode_prop = "ttyX-mode"; char *cd_prop = "ttyX-ignore-cd"; char *dtr_prop = "ttyX-rts-dtr-off"; int baud, bits, stop, cflag; char parity; int carrier = 0; int rtsdtr = 1; int topnd, nd; if (!serial_console) return; if (serial_console == 1) { mode_prop[3] = 'a'; cd_prop[3] = 'a'; dtr_prop[3] = 'a'; } else { mode_prop[3] = 'b'; cd_prop[3] = 'b'; dtr_prop[3] = 'b'; } topnd = prom_getchild(prom_root_node); nd = prom_searchsiblings(topnd, "options"); if (!nd) { strcpy(mode, "9600,8,n,1,-"); goto no_options; } if (!prom_node_has_property(nd, mode_prop)) { strcpy(mode, "9600,8,n,1,-"); goto no_options; } memset(mode, 0, sizeof(mode)); prom_getstring(nd, mode_prop, mode, sizeof(mode)); if (prom_node_has_property(nd, cd_prop)) { memset(buf, 0, sizeof(buf)); prom_getstring(nd, cd_prop, buf, sizeof(buf)); if (!strcmp(buf, "false")) carrier = 1; /* XXX: this is unused below. */ } if (prom_node_has_property(nd, dtr_prop)) { memset(buf, 0, sizeof(buf)); prom_getstring(nd, dtr_prop, buf, sizeof(buf)); if (!strcmp(buf, "false")) rtsdtr = 0; /* XXX: this is unused below. */ } no_options: cflag = CREAD | HUPCL | CLOCAL; s = mode; baud = simple_strtoul(s, NULL, 0); s = strchr(s, ','); bits = simple_strtoul(++s, NULL, 0); s = strchr(s, ','); parity = *(++s); s = strchr(s, ','); stop = simple_strtoul(++s, NULL, 0); s = strchr(s, ','); /* XXX handshake is not handled here. */ switch (baud) { case 150: cflag |= B150; break; case 300: cflag |= B300; break; case 600: cflag |= B600; break; case 1200: cflag |= B1200; break; case 2400: cflag |= B2400; break; case 4800: cflag |= B4800; break; case 9600: cflag |= B9600; break; case 19200: cflag |= B19200; break; case 38400: cflag |= B38400; break; default: baud = 9600; cflag |= B9600; break; } switch (bits) { case 5: cflag |= CS5; break; case 6: cflag |= CS6; break; case 7: cflag |= CS7; break; case 8: cflag |= CS8; break; default: cflag |= CS8; break; } switch (parity) { case 'o': cflag |= (PARENB | PARODD); break; case 'e': cflag |= PARENB; break; case 'n': default: break; } switch (stop) { case 2: cflag |= CSTOPB; break; case 1: default: break; } con->cflag = cflag; } EXPORT_SYMBOL(sunserial_console_termios); /* Sun serial MOUSE auto baud rate detection. */ static struct mouse_baud_cflag { int baud; unsigned int cflag; } mouse_baud_table[] = { { 1200, B1200 }, { 2400, B2400 }, { 4800, B4800 }, { 9600, B9600 }, { -1, ~0 }, { -1, ~0 }, }; unsigned int suncore_mouse_baud_cflag_next(unsigned int cflag, int *new_baud) { int i; for (i = 0; mouse_baud_table[i].baud != -1; i++) if (mouse_baud_table[i].cflag == (cflag & CBAUD)) break; i += 1; if (mouse_baud_table[i].baud == -1) i = 0; *new_baud = mouse_baud_table[i].baud; return mouse_baud_table[i].cflag; } EXPORT_SYMBOL(suncore_mouse_baud_cflag_next); /* Basically, when the baud rate is wrong the mouse spits out * breaks to us. */ int suncore_mouse_baud_detection(unsigned char ch, int is_break) { static int mouse_got_break = 0; static int ctr = 0; if (is_break) { /* Let a few normal bytes go by before we jump the gun * and say we need to try another baud rate. */ if (mouse_got_break && ctr < 8) return 1; /* Ok, we need to try another baud. */ ctr = 0; mouse_got_break = 1; return 2; } if (mouse_got_break) { ctr++; if (ch == 0x87) { /* Correct baud rate determined. */ mouse_got_break = 0; } return 1; } return 0; } EXPORT_SYMBOL(suncore_mouse_baud_detection); static int __init suncore_init(void) { return 0; } static void __exit suncore_exit(void) { } module_init(suncore_init); module_exit(suncore_exit); MODULE_AUTHOR("Eddie C. Dost, David S. Miller"); MODULE_DESCRIPTION("Sun serial common layer"); MODULE_LICENSE("GPL"); |