mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-17 07:28:51 +09:00
393 lines
7.8 KiB
C
393 lines
7.8 KiB
C
/*
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* (C) Copyright 2002
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* Wolfgang Denk, DENX Software Engineering, <wd@denx.de>
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*
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* (C) Copyright 2002
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* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
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* Marius Groeger <mgroeger@sysgo.de>
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*
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* (C) Copyright 2002
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* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
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* Alex Zuepke <azu@sysgo.de>
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*
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* Copyright (C) 1999 2000 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <common.h>
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#include <watchdog.h>
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#include <serial.h>
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#include <asm/arch/pxa-regs.h>
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#include <asm/io.h>
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DECLARE_GLOBAL_DATA_PTR;
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#define FFUART_INDEX 0
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#define BTUART_INDEX 1
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#define STUART_INDEX 2
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#ifndef CONFIG_SERIAL_MULTI
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#if defined (CONFIG_FFUART)
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#define UART_INDEX FFUART_INDEX
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#elif defined (CONFIG_BTUART)
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#define UART_INDEX BTUART_INDEX
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#elif defined (CONFIG_STUART)
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#define UART_INDEX STUART_INDEX
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#else
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#error "Bad: you didn't configure serial ..."
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#endif
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#endif
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void pxa_setbrg_dev (unsigned int uart_index)
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{
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unsigned int quot = 0;
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if (gd->baudrate == 1200)
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quot = 768;
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else if (gd->baudrate == 9600)
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quot = 96;
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else if (gd->baudrate == 19200)
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quot = 48;
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else if (gd->baudrate == 38400)
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quot = 24;
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else if (gd->baudrate == 57600)
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quot = 16;
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else if (gd->baudrate == 115200)
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quot = 8;
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else
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hang ();
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switch (uart_index) {
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case FFUART_INDEX:
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#ifdef CONFIG_CPU_MONAHANS
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writel(readl(CKENA) | CKENA_22_FFUART, CKENA);
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#else
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writel(readl(CKEN) | CKEN6_FFUART, CKEN);
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#endif /* CONFIG_CPU_MONAHANS */
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writel(0, FFIER); /* Disable for now */
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writel(0, FFFCR); /* No fifos enabled */
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/* set baud rate */
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writel(LCR_WLS0 | LCR_WLS1 | LCR_DLAB, FFLCR);
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writel(quot & 0xff, FFDLL);
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writel(quot >> 8, FFDLH);
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writel(LCR_WLS0 | LCR_WLS1, FFLCR);
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writel(IER_UUE, FFIER); /* Enable FFUART */
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break;
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case BTUART_INDEX:
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#ifdef CONFIG_CPU_MONAHANS
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writel(readl(CKENA) | CKENA_21_BTUART, CKENA);
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#else
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writel(readl(CKEN) | CKEN7_BTUART, CKEN);
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#endif /* CONFIG_CPU_MONAHANS */
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writel(0, BTIER);
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writel(0, BTFCR);
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/* set baud rate */
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writel(LCR_DLAB, BTLCR);
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writel(quot & 0xff, BTDLL);
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writel(quot >> 8, BTDLH);
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writel(LCR_WLS0 | LCR_WLS1, BTLCR);
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writel(IER_UUE, BTIER); /* Enable BFUART */
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break;
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case STUART_INDEX:
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#ifdef CONFIG_CPU_MONAHANS
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writel(readl(CKENA) | CKENA_23_STUART, CKENA);
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#else
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writel(readl(CKEN) | CKEN5_STUART, CKEN);
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#endif /* CONFIG_CPU_MONAHANS */
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writel(0, STIER);
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writel(0, STFCR);
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/* set baud rate */
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writel(LCR_DLAB, STLCR);
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writel(quot & 0xff, STDLL);
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writel(quot >> 8, STDLH);
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writel(LCR_WLS0 | LCR_WLS1, STLCR);
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writel(IER_UUE, STIER); /* Enable STUART */
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break;
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default:
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hang();
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}
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}
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/*
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* Initialise the serial port with the given baudrate. The settings
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* are always 8 data bits, no parity, 1 stop bit, no start bits.
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*
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*/
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int pxa_init_dev (unsigned int uart_index)
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{
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pxa_setbrg_dev (uart_index);
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return (0);
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}
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/*
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* Output a single byte to the serial port.
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*/
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void pxa_putc_dev (unsigned int uart_index,const char c)
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{
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switch (uart_index) {
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case FFUART_INDEX:
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/* wait for room in the tx FIFO on FFUART */
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while ((readl(FFLSR) & LSR_TEMT) == 0)
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WATCHDOG_RESET (); /* Reset HW Watchdog, if needed */
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writel(c, FFTHR);
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break;
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case BTUART_INDEX:
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while ((readl(BTLSR) & LSR_TEMT) == 0)
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WATCHDOG_RESET (); /* Reset HW Watchdog, if needed */
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writel(c, BTTHR);
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break;
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case STUART_INDEX:
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while ((readl(STLSR) & LSR_TEMT) == 0)
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WATCHDOG_RESET (); /* Reset HW Watchdog, if needed */
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writel(c, STTHR);
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break;
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}
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/* If \n, also do \r */
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if (c == '\n')
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pxa_putc_dev (uart_index,'\r');
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}
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/*
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* Read a single byte from the serial port. Returns 1 on success, 0
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* otherwise. When the function is succesfull, the character read is
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* written into its argument c.
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*/
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int pxa_tstc_dev (unsigned int uart_index)
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{
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switch (uart_index) {
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case FFUART_INDEX:
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return readl(FFLSR) & LSR_DR;
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case BTUART_INDEX:
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return readl(BTLSR) & LSR_DR;
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case STUART_INDEX:
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return readl(STLSR) & LSR_DR;
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}
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return -1;
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}
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/*
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* Read a single byte from the serial port. Returns 1 on success, 0
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* otherwise. When the function is succesfull, the character read is
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* written into its argument c.
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*/
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int pxa_getc_dev (unsigned int uart_index)
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{
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switch (uart_index) {
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case FFUART_INDEX:
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while (!(readl(FFLSR) & LSR_DR))
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/* Reset HW Watchdog, if needed */
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WATCHDOG_RESET();
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return (char) readl(FFRBR) & 0xff;
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case BTUART_INDEX:
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while (!(readl(BTLSR) & LSR_DR))
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/* Reset HW Watchdog, if needed */
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WATCHDOG_RESET();
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return (char) readl(BTRBR) & 0xff;
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case STUART_INDEX:
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while (!(readl(STLSR) & LSR_DR))
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/* Reset HW Watchdog, if needed */
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WATCHDOG_RESET();
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return (char) readl(STRBR) & 0xff;
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}
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return -1;
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}
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void
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pxa_puts_dev (unsigned int uart_index,const char *s)
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{
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while (*s) {
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pxa_putc_dev (uart_index,*s++);
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}
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}
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#if defined (CONFIG_FFUART)
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static int ffuart_init(void)
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{
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return pxa_init_dev(FFUART_INDEX);
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}
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static void ffuart_setbrg(void)
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{
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return pxa_setbrg_dev(FFUART_INDEX);
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}
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static void ffuart_putc(const char c)
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{
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return pxa_putc_dev(FFUART_INDEX,c);
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}
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static void ffuart_puts(const char *s)
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{
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return pxa_puts_dev(FFUART_INDEX,s);
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}
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static int ffuart_getc(void)
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{
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return pxa_getc_dev(FFUART_INDEX);
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}
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static int ffuart_tstc(void)
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{
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return pxa_tstc_dev(FFUART_INDEX);
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}
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struct serial_device serial_ffuart_device =
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{
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"serial_ffuart",
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"PXA",
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ffuart_init,
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NULL,
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ffuart_setbrg,
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ffuart_getc,
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ffuart_tstc,
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ffuart_putc,
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ffuart_puts,
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};
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#endif
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#if defined (CONFIG_BTUART)
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static int btuart_init(void)
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{
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return pxa_init_dev(BTUART_INDEX);
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}
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static void btuart_setbrg(void)
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{
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return pxa_setbrg_dev(BTUART_INDEX);
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}
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static void btuart_putc(const char c)
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{
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return pxa_putc_dev(BTUART_INDEX,c);
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}
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static void btuart_puts(const char *s)
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{
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return pxa_puts_dev(BTUART_INDEX,s);
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}
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static int btuart_getc(void)
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{
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return pxa_getc_dev(BTUART_INDEX);
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}
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static int btuart_tstc(void)
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{
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return pxa_tstc_dev(BTUART_INDEX);
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}
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struct serial_device serial_btuart_device =
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{
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"serial_btuart",
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"PXA",
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btuart_init,
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NULL,
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btuart_setbrg,
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btuart_getc,
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btuart_tstc,
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btuart_putc,
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btuart_puts,
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};
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#endif
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#if defined (CONFIG_STUART)
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static int stuart_init(void)
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{
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return pxa_init_dev(STUART_INDEX);
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}
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static void stuart_setbrg(void)
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{
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return pxa_setbrg_dev(STUART_INDEX);
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}
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static void stuart_putc(const char c)
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{
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return pxa_putc_dev(STUART_INDEX,c);
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}
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static void stuart_puts(const char *s)
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{
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return pxa_puts_dev(STUART_INDEX,s);
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}
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static int stuart_getc(void)
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{
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return pxa_getc_dev(STUART_INDEX);
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}
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static int stuart_tstc(void)
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{
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return pxa_tstc_dev(STUART_INDEX);
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}
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struct serial_device serial_stuart_device =
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{
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"serial_stuart",
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"PXA",
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stuart_init,
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NULL,
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stuart_setbrg,
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stuart_getc,
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stuart_tstc,
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stuart_putc,
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stuart_puts,
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};
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#endif
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#ifndef CONFIG_SERIAL_MULTI
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inline int serial_init(void) {
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return (pxa_init_dev(UART_INDEX));
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}
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void serial_setbrg(void) {
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pxa_setbrg_dev(UART_INDEX);
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}
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int serial_getc(void) {
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return(pxa_getc_dev(UART_INDEX));
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}
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int serial_tstc(void) {
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return(pxa_tstc_dev(UART_INDEX));
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}
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void serial_putc(const char c) {
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pxa_putc_dev(UART_INDEX,c);
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}
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void serial_puts(const char *s) {
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pxa_puts_dev(UART_INDEX,s);
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}
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#endif /* CONFIG_SERIAL_MULTI */
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