FreeCalypso > hg > freecalypso-sw

annotate doc/linux-2.6.37.6-ftdi_sio.c.patch @ 992:a7b0b426f9ca

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target-utils: boot ROM UART autodetection revamped The new implementation should work with both the familiar Calypso C035 boot ROM version found in our regular targets as well as the older Calypso F741979B version found on the vintage D-Sample board.
author Mychaela Falconia <falcon@ivan.Harhan.ORG>
date Wed, 30 Dec 2015 21:28:41 +0000
parents f4da3071dd61
children
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f4da3071dd61 doc/High-speed-serial write-up and Linux kernel patch added
Mychaela Falconia <falcon@ivan.Harhan.ORG>
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1 --- ftdi_sio.c.orig 2011-03-27 11:01:41.000000000 -0800
f4da3071dd61 doc/High-speed-serial write-up and Linux kernel patch added
Mychaela Falconia <falcon@ivan.Harhan.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 @@
f4da3071dd61 doc/High-speed-serial write-up and Linux kernel patch added
Mychaela Falconia <falcon@ivan.Harhan.ORG>
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4 static const unsigned char divfrac[8] = { 0, 3, 2, 4, 1, 5, 6, 7 };
f4da3071dd61 doc/High-speed-serial write-up and Linux kernel patch added
Mychaela Falconia <falcon@ivan.Harhan.ORG>
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5 __u32 divisor;
f4da3071dd61 doc/High-speed-serial write-up and Linux kernel patch added
Mychaela Falconia <falcon@ivan.Harhan.ORG>
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6 /* divisor shifted 3 bits to the left */
f4da3071dd61 doc/High-speed-serial write-up and Linux kernel patch added
Mychaela Falconia <falcon@ivan.Harhan.ORG>
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7 - int divisor3 = base / 2 / baud;
f4da3071dd61 doc/High-speed-serial write-up and Linux kernel patch added
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8 + int divisor3 = (base / 2 + baud / 2) / baud;
f4da3071dd61 doc/High-speed-serial write-up and Linux kernel patch added
Mychaela Falconia <falcon@ivan.Harhan.ORG>
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9 divisor = divisor3 >> 3;
f4da3071dd61 doc/High-speed-serial write-up and Linux kernel patch added
Mychaela Falconia <falcon@ivan.Harhan.ORG>
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10 divisor |= (__u32)divfrac[divisor3 & 0x7] << 14;
f4da3071dd61 doc/High-speed-serial write-up and Linux kernel patch added
Mychaela Falconia <falcon@ivan.Harhan.ORG>
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11 /* Deal with special cases for highest baud rates. */
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12 @@ -1087,6 +1087,17 @@
f4da3071dd61 doc/High-speed-serial write-up and Linux kernel patch added
Mychaela Falconia <falcon@ivan.Harhan.ORG>
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13 baud = tty_get_baud_rate(tty);
f4da3071dd61 doc/High-speed-serial write-up and Linux kernel patch added
Mychaela Falconia <falcon@ivan.Harhan.ORG>
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14 dbg("%s - tty_get_baud_rate reports speed %d", __func__, baud);
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Mychaela Falconia <falcon@ivan.Harhan.ORG>
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15
f4da3071dd61 doc/High-speed-serial write-up and Linux kernel patch added
Mychaela Falconia <falcon@ivan.Harhan.ORG>
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16 + /*
f4da3071dd61 doc/High-speed-serial write-up and Linux kernel patch added
Mychaela Falconia <falcon@ivan.Harhan.ORG>
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17 + * FreeCalypso hack: translate non-std high
f4da3071dd61 doc/High-speed-serial write-up and Linux kernel patch added
Mychaela Falconia <falcon@ivan.Harhan.ORG>
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18 + * baud rates for GSM like CP2102 does.
f4da3071dd61 doc/High-speed-serial write-up and Linux kernel patch added
Mychaela Falconia <falcon@ivan.Harhan.ORG>
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19 + */
f4da3071dd61 doc/High-speed-serial write-up and Linux kernel patch added
Mychaela Falconia <falcon@ivan.Harhan.ORG>
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20 + if (baud == 230400)
f4da3071dd61 doc/High-speed-serial write-up and Linux kernel patch added
Mychaela Falconia <falcon@ivan.Harhan.ORG>
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21 + baud = 203125;
f4da3071dd61 doc/High-speed-serial write-up and Linux kernel patch added
Mychaela Falconia <falcon@ivan.Harhan.ORG>
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22 + else if (baud == 460800)
f4da3071dd61 doc/High-speed-serial write-up and Linux kernel patch added
Mychaela Falconia <falcon@ivan.Harhan.ORG>
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23 + baud = 406250;
f4da3071dd61 doc/High-speed-serial write-up and Linux kernel patch added
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24 + else if (baud == 921600)
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Mychaela Falconia <falcon@ivan.Harhan.ORG>
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25 + baud = 812500;
f4da3071dd61 doc/High-speed-serial write-up and Linux kernel patch added
Mychaela Falconia <falcon@ivan.Harhan.ORG>
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26 +
f4da3071dd61 doc/High-speed-serial write-up and Linux kernel patch added
Mychaela Falconia <falcon@ivan.Harhan.ORG>
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27 /* 2. Observe async-compatible custom_divisor hack, update baudrate
f4da3071dd61 doc/High-speed-serial write-up and Linux kernel patch added
Mychaela Falconia <falcon@ivan.Harhan.ORG>
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28 if needed */
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29