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annotate libpwon/etmoff.c @ 954:21604c3413c1

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rvinterf: disallow -Petmoff mode
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 07 Jun 2023 20:15:43 +0000
parents ab54957dbe35
children
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953
ab54957dbe35 libpwon: implement -Petmoff mode
Mychaela Falconia <falcon@freecalypso.org>
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1 /*
ab54957dbe35 libpwon: implement -Petmoff mode
Mychaela Falconia <falcon@freecalypso.org>
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2 * This libpwon module implements -Petmoff mode: set the baud rate to 115200
ab54957dbe35 libpwon: implement -Petmoff mode
Mychaela Falconia <falcon@freecalypso.org>
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3 * and send out ETM command doing Iota poweroff, triggering a VRPC reboot cycle
ab54957dbe35 libpwon: implement -Petmoff mode
Mychaela Falconia <falcon@freecalypso.org>
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4 * on the USB-charging phone. The "wakeup shot" logic is a copy of what we do
ab54957dbe35 libpwon: implement -Petmoff mode
Mychaela Falconia <falcon@freecalypso.org>
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5 * in rvinterf.
ab54957dbe35 libpwon: implement -Petmoff mode
Mychaela Falconia <falcon@freecalypso.org>
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6 */
ab54957dbe35 libpwon: implement -Petmoff mode
Mychaela Falconia <falcon@freecalypso.org>
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7
ab54957dbe35 libpwon: implement -Petmoff mode
Mychaela Falconia <falcon@freecalypso.org>
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8 #include <sys/types.h>
ab54957dbe35 libpwon: implement -Petmoff mode
Mychaela Falconia <falcon@freecalypso.org>
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9 #include <unistd.h>
ab54957dbe35 libpwon: implement -Petmoff mode
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10
ab54957dbe35 libpwon: implement -Petmoff mode
Mychaela Falconia <falcon@freecalypso.org>
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11 extern int target_fd;
ab54957dbe35 libpwon: implement -Petmoff mode
Mychaela Falconia <falcon@freecalypso.org>
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12
ab54957dbe35 libpwon: implement -Petmoff mode
Mychaela Falconia <falcon@freecalypso.org>
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13 static u_char wakeup_shot[64];
ab54957dbe35 libpwon: implement -Petmoff mode
Mychaela Falconia <falcon@freecalypso.org>
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14 static u_char etm_devoff_pkt[9] =
ab54957dbe35 libpwon: implement -Petmoff mode
Mychaela Falconia <falcon@freecalypso.org>
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15 {0x02, 0x14, 0x01, 0x67, 0x1E, 0x01, 0x00, 0x79, 0x02};
ab54957dbe35 libpwon: implement -Petmoff mode
Mychaela Falconia <falcon@freecalypso.org>
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16
ab54957dbe35 libpwon: implement -Petmoff mode
Mychaela Falconia <falcon@freecalypso.org>
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17 void
ab54957dbe35 libpwon: implement -Petmoff mode
Mychaela Falconia <falcon@freecalypso.org>
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18 bootctrl_do_etmoff()
ab54957dbe35 libpwon: implement -Petmoff mode
Mychaela Falconia <falcon@freecalypso.org>
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19 {
ab54957dbe35 libpwon: implement -Petmoff mode
Mychaela Falconia <falcon@freecalypso.org>
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20 set_fixed_baudrate("115200");
ab54957dbe35 libpwon: implement -Petmoff mode
Mychaela Falconia <falcon@freecalypso.org>
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21 set_serial_nonblock(0);
ab54957dbe35 libpwon: implement -Petmoff mode
Mychaela Falconia <falcon@freecalypso.org>
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22 write(target_fd, wakeup_shot, sizeof wakeup_shot);
ab54957dbe35 libpwon: implement -Petmoff mode
Mychaela Falconia <falcon@freecalypso.org>
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23 usleep(100000);
ab54957dbe35 libpwon: implement -Petmoff mode
Mychaela Falconia <falcon@freecalypso.org>
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24 write(target_fd, etm_devoff_pkt, sizeof etm_devoff_pkt);
ab54957dbe35 libpwon: implement -Petmoff mode
Mychaela Falconia <falcon@freecalypso.org>
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25 }