FreeCalypso > hg > freecalypso-tools
annotate doc/linux-2.6.37.6-ftdi_sio.c.patch @ 155:f5a797c291be
fc-tmsh l1tm response handling: returned values can be signed or unsigned
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Fri, 17 Mar 2017 05:47:00 +0000 |
parents | e7502631a0f9 |
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rev | line source |
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1 --- ftdi_sio.c.orig 2011-03-27 11:01:41.000000000 -0800 |
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Mychaela Falconia <falcon@freecalypso.org>
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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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Mychaela Falconia <falcon@freecalypso.org>
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6 /* divisor shifted 3 bits to the left */ |
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Mychaela Falconia <falcon@freecalypso.org>
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7 - int divisor3 = base / 2 / baud; |
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Mychaela Falconia <falcon@freecalypso.org>
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8 + int divisor3 = (base / 2 + baud / 2) / baud; |
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Mychaela Falconia <falcon@freecalypso.org>
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9 divisor = divisor3 >> 3; |
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Mychaela Falconia <falcon@freecalypso.org>
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10 divisor |= (__u32)divfrac[divisor3 & 0x7] << 14; |
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Mychaela Falconia <falcon@freecalypso.org>
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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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Mychaela Falconia <falcon@freecalypso.org>
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13 baud = tty_get_baud_rate(tty); |
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Mychaela Falconia <falcon@freecalypso.org>
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14 dbg("%s - tty_get_baud_rate reports speed %d", __func__, baud); |
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15 |
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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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29 |