FreeCalypso > hg > freecalypso-tools
comparison old/linux-2.6.37.6-ftdi_sio.c.patch @ 259:40f44aa49dd0
linux-2.6.37.6-ftdi_sio.c.patch moved from doc to old
| author | Mychaela Falconia <falcon@freecalypso.org> |
|---|---|
| date | Thu, 28 Sep 2017 07:55:58 +0000 |
| parents | doc/linux-2.6.37.6-ftdi_sio.c.patch@e7502631a0f9 |
| children |
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| 258:00805e7c4c45 | 259:40f44aa49dd0 |
|---|---|
| 1 --- ftdi_sio.c.orig 2011-03-27 11:01:41.000000000 -0800 | |
| 2 +++ ftdi_sio.c 2015-10-30 13:18:40.879000032 -0800 | |
| 3 @@ -949,7 +949,7 @@ | |
| 4 static const unsigned char divfrac[8] = { 0, 3, 2, 4, 1, 5, 6, 7 }; | |
| 5 __u32 divisor; | |
| 6 /* divisor shifted 3 bits to the left */ | |
| 7 - int divisor3 = base / 2 / baud; | |
| 8 + int divisor3 = (base / 2 + baud / 2) / baud; | |
| 9 divisor = divisor3 >> 3; | |
| 10 divisor |= (__u32)divfrac[divisor3 & 0x7] << 14; | |
| 11 /* Deal with special cases for highest baud rates. */ | |
| 12 @@ -1087,6 +1087,17 @@ | |
| 13 baud = tty_get_baud_rate(tty); | |
| 14 dbg("%s - tty_get_baud_rate reports speed %d", __func__, baud); | |
| 15 | |
| 16 + /* | |
| 17 + * FreeCalypso hack: translate non-std high | |
| 18 + * baud rates for GSM like CP2102 does. | |
| 19 + */ | |
| 20 + if (baud == 230400) | |
| 21 + baud = 203125; | |
| 22 + else if (baud == 460800) | |
| 23 + baud = 406250; | |
| 24 + else if (baud == 921600) | |
| 25 + baud = 812500; | |
| 26 + | |
| 27 /* 2. Observe async-compatible custom_divisor hack, update baudrate | |
| 28 if needed */ | |
| 29 |