FreeCalypso > hg > freecalypso-tools

annotate target-utils/libcommon/uartsel.c @ 1012:11391cb6bdc0

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patch from fixeria: doc change from SE K2x0 to K2xx Since their discovery in late 2022, Sony Ericsson K200 and K220 phones were collectively referred to as SE K2x0 in FreeCalypso documentation. However, now that SE K205 has been discovered as yet another member of the same family (same PCBA in different case), it makes more sense to refer to the whole family as SE K2xx.
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 23 Sep 2024 12:23:20 +0000
parents 2942c5ef76ed
children
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1 /*
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2 * uart_select_init() figures out which UART was used to load us
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3 * through the boot ROM, and sets things up for us to use the same
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4 * UART for our communication.
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5 */
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6
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7 #include "types.h"
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8 #include "romvars.h"
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9 #include "ns16550.h"
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10 #include "halt.h"
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11
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12 extern struct ns16550_regs *uart_base;
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13
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14 static u16 rom_version;
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15 static struct boot_rom_vars *rom_vars;
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16 static char *uart_name;
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18 uart_select_init()
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19 {
35
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20 rom_version = *(const u16 *)0x1FFE;
0
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22 switch (rom_version) {
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23 case 0x0200:
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24 rom_vars = (struct boot_rom_vars *) 0x800504;
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25 break;
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26 case 0x0300:
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27 rom_vars = (struct boot_rom_vars *) 0x800518;
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28 break;
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29 default:
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30 _exit(HALTCODE_BOOTROMVER);
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31 }
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32
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33 switch (rom_vars->uart_id) {
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34 case 0:
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35 uart_base = (struct ns16550_regs *) 0xFFFF5800;
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36 uart_name = "MODEM";
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37 break;
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38 case 1:
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39 uart_base = (struct ns16550_regs *) 0xFFFF5000;
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40 uart_name = "IrDA";
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41 break;
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42 default:
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43 _exit(HALTCODE_INVALIDUART);
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44 }
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45 }
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46
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47 print_boot_rom_info()
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48 {
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49 printf("Loaded via boot ROM v%04X, UART %d (%s) at baud rate #%d\n",
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50 rom_version, rom_vars->uart_id, uart_name,
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51 rom_vars->baud_rate_code);
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52 printf("CLKTCXO input autodetected to be %d MHz\n",
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53 rom_vars->clktcxo_13mhz ? 13 : 26);
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54 }