/* * (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 <serial.h> #include <asm/arch/pxa-regs.h> DECLARE_GLOBAL_DATA_PTR; #define FFUART_INDEX 0 #define BTUART_INDEX 1 #define STUART_INDEX 2 #ifndef CONFIG_SERIAL_MULTI #if defined (CONFIG_FFUART) #define UART_INDEX FFUART_INDEX #elif defined (CONFIG_BTUART) #define UART_INDEX BTUART_INDEX #elif defined (CONFIG_STUART) #define UART_INDEX STUART_INDEX #else #error "Bad: you didn't configure serial ..." #endif #endif void pxa_setbrg_dev (unsigned int uart_index) { 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 (); switch (uart_index) { case FFUART_INDEX: #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 */ break; case BTUART_INDEX: #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 */ break; case STUART_INDEX: #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 */ break; default: hang(); } } /* * Initialise the serial port with the given baudrate. The settings * are always 8 data bits, no parity, 1 stop bit, no start bits. * */ int pxa_init_dev (unsigned int uart_index) { pxa_setbrg_dev (uart_index); return (0); } /* * Output a single byte to the serial port. */ void pxa_putc_dev (unsigned int uart_index,const char c) { switch (uart_index) { case FFUART_INDEX: /* wait for room in the tx FIFO on FFUART */ while ((FFLSR & LSR_TEMT) == 0) WATCHDOG_RESET (); /* Reset HW Watchdog, if needed */ FFTHR = c; break; case BTUART_INDEX: while ((BTLSR & LSR_TEMT ) == 0 ) WATCHDOG_RESET (); /* Reset HW Watchdog, if needed */ BTTHR = c; break; case STUART_INDEX: while ((STLSR & LSR_TEMT ) == 0 ) WATCHDOG_RESET (); /* Reset HW Watchdog, if needed */ STTHR = c; break; } /* If \n, also do \r */ if (c == '\n') pxa_putc_dev (uart_index,'\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 pxa_tstc_dev (unsigned int uart_index) { switch (uart_index) { case FFUART_INDEX: return FFLSR & LSR_DR; case BTUART_INDEX: return BTLSR & LSR_DR; case STUART_INDEX: return STLSR & LSR_DR; } return -1; } /* * 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 pxa_getc_dev (unsigned int uart_index) { switch (uart_index) { case FFUART_INDEX: while (!(FFLSR & LSR_DR)) WATCHDOG_RESET (); /* Reset HW Watchdog, if needed */ return (char) FFRBR & 0xff; case BTUART_INDEX: while (!(BTLSR & LSR_DR)) WATCHDOG_RESET (); /* Reset HW Watchdog, if needed */ return (char) BTRBR & 0xff; case STUART_INDEX: while (!(STLSR & LSR_DR)) WATCHDOG_RESET (); /* Reset HW Watchdog, if needed */ return (char) STRBR & 0xff; } return -1; } void pxa_puts_dev (unsigned int uart_index,const char *s) { while (*s) { pxa_putc_dev (uart_index,*s++); } } #if defined (CONFIG_FFUART) static int ffuart_init(void) { return pxa_init_dev(FFUART_INDEX); } static void ffuart_setbrg(void) { return pxa_setbrg_dev(FFUART_INDEX); } static void ffuart_putc(const char c) { return pxa_putc_dev(FFUART_INDEX,c); } static void ffuart_puts(const char *s) { return pxa_puts_dev(FFUART_INDEX,s); } static int ffuart_getc(void) { return pxa_getc_dev(FFUART_INDEX); } static int ffuart_tstc(void) { return pxa_tstc_dev(FFUART_INDEX); } struct serial_device serial_ffuart_device = { "serial_ffuart", "PXA", ffuart_init, ffuart_setbrg, ffuart_getc, ffuart_tstc, ffuart_putc, ffuart_puts, }; #endif #if defined (CONFIG_BTUART) static int btuart_init(void) { return pxa_init_dev(BTUART_INDEX); } static void btuart_setbrg(void) { return pxa_setbrg_dev(BTUART_INDEX); } static void btuart_putc(const char c) { return pxa_putc_dev(BTUART_INDEX,c); } static void btuart_puts(const char *s) { return pxa_puts_dev(BTUART_INDEX,s); } static int btuart_getc(void) { return pxa_getc_dev(BTUART_INDEX); } static int btuart_tstc(void) { return pxa_tstc_dev(BTUART_INDEX); } struct serial_device serial_btuart_device = { "serial_btuart", "PXA", btuart_init, btuart_setbrg, btuart_getc, btuart_tstc, btuart_putc, btuart_puts, }; #endif #if defined (CONFIG_STUART) static int stuart_init(void) { return pxa_init_dev(STUART_INDEX); } static void stuart_setbrg(void) { return pxa_setbrg_dev(STUART_INDEX); } static void stuart_putc(const char c) { return pxa_putc_dev(STUART_INDEX,c); } static void stuart_puts(const char *s) { return pxa_puts_dev(STUART_INDEX,s); } static int stuart_getc(void) { return pxa_getc_dev(STUART_INDEX); } static int stuart_tstc(void) { return pxa_tstc_dev(STUART_INDEX); } struct serial_device serial_stuart_device = { "serial_stuart", "PXA", stuart_init, stuart_setbrg, stuart_getc, stuart_tstc, stuart_putc, stuart_puts, }; #endif #ifndef CONFIG_SERIAL_MULTI inline int serial_init(void) { return (pxa_init_dev(UART_INDEX)); } void serial_setbrg(void) { pxa_setbrg_dev(UART_INDEX); } int serial_getc(void) { return(pxa_getc_dev(UART_INDEX)); } int serial_tstc(void) { return(pxa_tstc_dev(UART_INDEX)); } void serial_putc(const char c) { pxa_putc_dev(UART_INDEX,c); } void serial_puts(const char *s) { pxa_puts_dev(UART_INDEX,s); } #endif /* CONFIG_SERIAL_MULTI */