3 * Wolfgang Denk, DENX Software Engineering, <wd@denx.de>
6 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
7 * Marius Groeger <mgroeger@sysgo.de>
10 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
11 * Alex Zuepke <azu@sysgo.de>
13 * Copyright (C) 1999 2000 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl)
15 * This program is free software; you can redistribute it and/or modify
16 * it under the terms of the GNU General Public License as published by
17 * the Free Software Foundation; either version 2 of the License, or
18 * (at your option) any later version.
20 * This program is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 * GNU General Public License for more details.
25 * You should have received a copy of the GNU General Public License
26 * along with this program; if not, write to the Free Software
27 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
33 #include <asm/arch/pxa-regs.h>
35 void serial_setbrg (void)
37 DECLARE_GLOBAL_DATA_PTR;
39 unsigned int quot = 0;
41 if (gd->baudrate == 1200)
43 else if (gd->baudrate == 9600)
45 else if (gd->baudrate == 19200)
47 else if (gd->baudrate == 38400)
49 else if (gd->baudrate == 57600)
51 else if (gd->baudrate == 115200)
59 FFIER = 0; /* Disable for now */
60 FFFCR = 0; /* No fifos enabled */
63 FFLCR = LCR_WLS0 | LCR_WLS1 | LCR_DLAB;
66 FFLCR = LCR_WLS0 | LCR_WLS1;
68 FFIER = IER_UUE; /* Enable FFUART */
70 #elif defined(CONFIG_BTUART)
80 BTLCR = LCR_WLS0 | LCR_WLS1;
82 BTIER = IER_UUE; /* Enable BFUART */
84 #elif defined(CONFIG_STUART)
94 STLCR = LCR_WLS0 | LCR_WLS1;
96 STIER = IER_UUE; /* Enable STUART */
99 #error "Bad: you didn't configure serial ..."
105 * Initialise the serial port with the given baudrate. The settings
106 * are always 8 data bits, no parity, 1 stop bit, no start bits.
109 int serial_init (void)
118 * Output a single byte to the serial port.
120 void serial_putc (const char c)
123 /* wait for room in the tx FIFO on FFUART */
124 while ((FFLSR & LSR_TEMT) == 0)
125 WATCHDOG_RESET (); /* Reset HW Watchdog, if needed */
127 #elif defined(CONFIG_BTUART)
128 while ((BTLSR & LSR_TEMT ) == 0 )
129 WATCHDOG_RESET (); /* Reset HW Watchdog, if needed */
131 #elif defined(CONFIG_STUART)
132 while ((STLSR & LSR_TEMT ) == 0 )
133 WATCHDOG_RESET (); /* Reset HW Watchdog, if needed */
137 /* If \n, also do \r */
143 * Read a single byte from the serial port. Returns 1 on success, 0
144 * otherwise. When the function is succesfull, the character read is
145 * written into its argument c.
147 int serial_tstc (void)
150 return FFLSR & LSR_DR;
151 #elif defined(CONFIG_BTUART)
152 return BTLSR & LSR_DR;
153 #elif defined(CONFIG_STUART)
154 return STLSR & LSR_DR;
159 * Read a single byte from the serial port. Returns 1 on success, 0
160 * otherwise. When the function is succesfull, the character read is
161 * written into its argument c.
163 int serial_getc (void)
166 while (!(FFLSR & LSR_DR))
167 WATCHDOG_RESET (); /* Reset HW Watchdog, if needed */
168 return (char) FFRBR & 0xff;
169 #elif defined(CONFIG_BTUART)
170 while (!(BTLSR & LSR_DR))
171 WATCHDOG_RESET (); /* Reset HW Watchdog, if needed */
172 return (char) BTRBR & 0xff;
173 #elif defined(CONFIG_STUART)
174 while (!(STLSR & LSR_DR))
175 WATCHDOG_RESET (); /* Reset HW Watchdog, if needed */
176 return (char) STRBR & 0xff;
181 serial_puts (const char *s)