/* * (C) Copyright 2002 * Wolfgang Denk, DENX Software Engineering, <wd@denx.de> * * (C) Copyright 2002 * Sysgo Real-Time Solutions, GmbH <www.elinos.com> * Marius Groeger <mgroeger@sysgo.de> * * (C) Copyright 2002 * Sysgo Real-Time Solutions, GmbH <www.elinos.com> * Alex Zuepke <azu@sysgo.de> * * Copyright (C) 1999 2000 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl) * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * */ #include <common.h> #include <watchdog.h> #include <asm/arch/pxa-regs.h> DECLARE_GLOBAL_DATA_PTR; void serial_setbrg (void) { unsigned int quot = 0; if (gd->baudrate == 1200) quot = 768; else if (gd->baudrate == 9600) quot = 96; else if (gd->baudrate == 19200) quot = 48; else if (gd->baudrate == 38400) quot = 24; else if (gd->baudrate == 57600) quot = 16; else if (gd->baudrate == 115200) quot = 8; else hang (); #ifdef CONFIG_FFUART #ifdef CONFIG_CPU_MONAHANS CKENA |= CKENA_22_FFUART; #else CKEN |= CKEN6_FFUART; #endif /* CONFIG_CPU_MONAHANS */ FFIER = 0; /* Disable for now */ FFFCR = 0; /* No fifos enabled */ /* set baud rate */ FFLCR = LCR_WLS0 | LCR_WLS1 | LCR_DLAB; FFDLL = quot & 0xff; FFDLH = quot >> 8; FFLCR = LCR_WLS0 | LCR_WLS1; FFIER = IER_UUE; /* Enable FFUART */ #elif defined(CONFIG_BTUART) #ifdef CONFIG_CPU_MONAHANS CKENA |= CKENA_21_BTUART; #else CKEN |= CKEN7_BTUART; #endif /* CONFIG_CPU_MONAHANS */ BTIER = 0; BTFCR = 0; /* set baud rate */ BTLCR = LCR_DLAB; BTDLL = quot & 0xff; BTDLH = quot >> 8; BTLCR = LCR_WLS0 | LCR_WLS1; BTIER = IER_UUE; /* Enable BFUART */ #elif defined(CONFIG_STUART) #ifdef CONFIG_CPU_MONAHANS CKENA |= CKENA_23_STUART; #else CKEN |= CKEN5_STUART; #endif /* CONFIG_CPU_MONAHANS */ STIER = 0; STFCR = 0; /* set baud rate */ STLCR = LCR_DLAB; STDLL = quot & 0xff; STDLH = quot >> 8; STLCR = LCR_WLS0 | LCR_WLS1; STIER = IER_UUE; /* Enable STUART */ #else #error "Bad: you didn't configure serial ..." #endif } /* * Initialise the serial port with the given baudrate. The settings * are always 8 data bits, no parity, 1 stop bit, no start bits. * */ int serial_init (void) { serial_setbrg (); return (0); } /* * Output a single byte to the serial port. */ void serial_putc (const char c) { #ifdef CONFIG_FFUART /* wait for room in the tx FIFO on FFUART */ while ((FFLSR & LSR_TEMT) == 0) WATCHDOG_RESET (); /* Reset HW Watchdog, if needed */ FFTHR = c; #elif defined(CONFIG_BTUART) while ((BTLSR & LSR_TEMT ) == 0 ) WATCHDOG_RESET (); /* Reset HW Watchdog, if needed */ BTTHR = c; #elif defined(CONFIG_STUART) while ((STLSR & LSR_TEMT ) == 0 ) WATCHDOG_RESET (); /* Reset HW Watchdog, if needed */ STTHR = c; #endif /* If \n, also do \r */ if (c == '\n') serial_putc ('\r'); } /* * Read a single byte from the serial port. Returns 1 on success, 0 * otherwise. When the function is succesfull, the character read is * written into its argument c. */ int serial_tstc (void) { #ifdef CONFIG_FFUART return FFLSR & LSR_DR; #elif defined(CONFIG_BTUART) return BTLSR & LSR_DR; #elif defined(CONFIG_STUART) return STLSR & LSR_DR; #endif } /* * Read a single byte from the serial port. Returns 1 on success, 0 * otherwise. When the function is succesfull, the character read is * written into its argument c. */ int serial_getc (void) { #ifdef CONFIG_FFUART while (!(FFLSR & LSR_DR)) WATCHDOG_RESET (); /* Reset HW Watchdog, if needed */ return (char) FFRBR & 0xff; #elif defined(CONFIG_BTUART) while (!(BTLSR & LSR_DR)) WATCHDOG_RESET (); /* Reset HW Watchdog, if needed */ return (char) BTRBR & 0xff; #elif defined(CONFIG_STUART) while (!(STLSR & LSR_DR)) WATCHDOG_RESET (); /* Reset HW Watchdog, if needed */ return (char) STRBR & 0xff; #endif } void serial_puts (const char *s) { while (*s) { serial_putc (*s++); } }