FreeCalypso > hg > freecalypso-tools

annotate old/linux-2.6.37.6-ftdi_sio.c.patch @ 926:6a0aa8d36d06

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rvinterf backslash escape: introduce libprint The new helper function library named libprint is meant to replace the badly misnamed libg23, and will soon contain functions for printing all of the same kinds of GPF TST packets that are now handled in libg23. However, we are also moving safe_print_trace() from libasync to this new library, and changing it to emit our new backslash escape format.
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 23 May 2023 03:47:46 +0000
parents 40f44aa49dd0
children
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1 --- ftdi_sio.c.orig 2011-03-27 11:01:41.000000000 -0800
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2 +++ ftdi_sio.c 2015-10-30 13:18:40.879000032 -0800
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3 @@ -949,7 +949,7 @@
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4 static const unsigned char divfrac[8] = { 0, 3, 2, 4, 1, 5, 6, 7 };
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5 __u32 divisor;
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6 /* divisor shifted 3 bits to the left */
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7 - int divisor3 = base / 2 / baud;
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8 + int divisor3 = (base / 2 + baud / 2) / baud;
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9 divisor = divisor3 >> 3;
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10 divisor |= (__u32)divfrac[divisor3 & 0x7] << 14;
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11 /* Deal with special cases for highest baud rates. */
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12 @@ -1087,6 +1087,17 @@
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13 baud = tty_get_baud_rate(tty);
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14 dbg("%s - tty_get_baud_rate reports speed %d", __func__, baud);
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16 + /*
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17 + * FreeCalypso hack: translate non-std high
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18 + * baud rates for GSM like CP2102 does.
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19 + */
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20 + if (baud == 230400)
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21 + baud = 203125;
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22 + else if (baud == 460800)
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23 + baud = 406250;
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24 + else if (baud == 921600)
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25 + baud = 812500;
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26 +
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27 /* 2. Observe async-compatible custom_divisor hack, update baudrate
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28 if needed */
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