diff options
Diffstat (limited to 'arch/mips/gt64120/ev64120/serialGT.c')
| -rw-r--r-- | arch/mips/gt64120/ev64120/serialGT.c | 212 |
1 files changed, 0 insertions, 212 deletions
diff --git a/arch/mips/gt64120/ev64120/serialGT.c b/arch/mips/gt64120/ev64120/serialGT.c deleted file mode 100644 index 8f0d835..0000000 --- a/arch/mips/gt64120/ev64120/serialGT.c +++ /dev/null @@ -1,212 +0,0 @@ -/* - * serialGT.c - * - * BRIEF MODULE DESCRIPTION - * Low Level Serial Port control for use - * with the Galileo EVB64120A MIPS eval board and - * its on board two channel 16552 Uart. - * - * Copyright (C) 2000 RidgeRun, Inc. - * Author: RidgeRun, Inc. - * glonnon@ridgerun.com, skranz@ridgerun.com, stevej@ridgerun.com - * - * 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 SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED - * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN - * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT - * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF - * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON - * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF - * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - * 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., - * 675 Mass Ave, Cambridge, MA 02139, USA. - * - */ - -// Note: -// Serial CHANNELS - 0 is the bottom connector of evb64120A. -// (The one that maps to the "B" channel of the -// board's uart) -// 1 is the top connector of evb64120A. -// (The one that maps to the "A" channel of the -// board's uart) -int DEBUG_CHANNEL = 0; // See Note Above -int CONSOLE_CHANNEL = 1; // See Note Above - -#define DUART 0xBD000000 /* Base address of Uart. */ -#define CHANNELOFFSET 0x20 /* DUART+CHANNELOFFSET gets you to the ChanA - register set of the 16552 Uart device. - DUART+0 gets you to the ChanB register set. - */ -#define DUART_DELTA 0x4 -#define FIFO_ENABLE 0x07 -#define INT_ENABLE 0x04 /* default interrupt mask */ - -#define RBR 0x00 -#define THR 0x00 -#define DLL 0x00 -#define IER 0x01 -#define DLM 0x01 -#define IIR 0x02 -#define FCR 0x02 -#define LCR 0x03 -#define MCR 0x04 -#define LSR 0x05 -#define MSR 0x06 -#define SCR 0x07 - -#define LCR_DLAB 0x80 -#define XTAL 1843200 -#define LSR_THRE 0x20 -#define LSR_BI 0x10 -#define LSR_DR 0x01 -#define MCR_LOOP 0x10 -#define ACCESS_DELAY 0x10000 - -/****************************** - Routine: - Description: - ******************************/ -int inreg(int channel, int reg) -{ - int val; - val = - *((volatile unsigned char *) DUART + - (channel * CHANNELOFFSET) + (reg * DUART_DELTA)); - return val; -} - -/****************************** - Routine: - Description: - ******************************/ -void outreg(int channel, int reg, unsigned char val) -{ - *((volatile unsigned char *) DUART + (channel * CHANNELOFFSET) - + (reg * DUART_DELTA)) = val; -} - -/****************************** - Routine: - Description: - Initialize the device driver. - ******************************/ -void serial_init(int channel) -{ - /* - * Configure active port, (CHANNELOFFSET already set.) - * - * Set 8 bits, 1 stop bit, no parity. - * - * LCR<7> 0 divisor latch access bit - * LCR<6> 0 break control (1=send break) - * LCR<5> 0 stick parity (0=space, 1=mark) - * LCR<4> 0 parity even (0=odd, 1=even) - * LCR<3> 0 parity enable (1=enabled) - * LCR<2> 0 # stop bits (0=1, 1=1.5) - * LCR<1:0> 11 bits per character(00=5, 01=6, 10=7, 11=8) - */ - outreg(channel, LCR, 0x3); - - outreg(channel, FCR, FIFO_ENABLE); /* Enable the FIFO */ - - outreg(channel, IER, INT_ENABLE); /* Enable appropriate interrupts */ -} - -/****************************** - Routine: - Description: - Set the baud rate. - ******************************/ -void serial_set(int channel, unsigned long baud) -{ - unsigned char sav_lcr; - - /* - * Enable access to the divisor latches by setting DLAB in LCR. - * - */ - sav_lcr = inreg(channel, LCR); - -#if 0 - /* - * Set baud rate - */ - outreg(channel, LCR, LCR_DLAB | sav_lcr); - // outreg(DLL,(XTAL/(16*2*(baud))-2)); - outreg(channel, DLL, XTAL / (16 * baud)); - // outreg(DLM,(XTAL/(16*2*(baud))-2)>>8); - outreg(channel, DLM, (XTAL / (16 * baud)) >> 8); -#else - /* - * Note: Set baud rate, hardcoded here for rate of 115200 - * since became unsure of above "baud rate" algorithm (??). - */ - outreg(channel, LCR, 0x83); - outreg(channel, DLM, 0x00); // See note above - outreg(channel, DLL, 0x02); // See note above. - outreg(channel, LCR, 0x03); -#endif - - /* - * Restore line control register - */ - outreg(channel, LCR, sav_lcr); -} - - -/****************************** - Routine: - Description: - Transmit a character. - ******************************/ -void serial_putc(int channel, int c) -{ - while ((inreg(channel, LSR) & LSR_THRE) == 0); - outreg(channel, THR, c); -} - -/****************************** - Routine: - Description: - Read a received character if one is - available. Return -1 otherwise. - ******************************/ -int serial_getc(int channel) -{ - if (inreg(channel, LSR) & LSR_DR) { - return inreg(channel, RBR); - } - return -1; -} - -/****************************** - Routine: - Description: - Used by embedded gdb client. (example; gdb-stub.c) - ******************************/ -char getDebugChar() -{ - int val; - while ((val = serial_getc(DEBUG_CHANNEL)) == -1); // loop until we get a character in. - return (char) val; -} - -/****************************** - Routine: - Description: - Used by embedded gdb target. (example; gdb-stub.c) - ******************************/ -void putDebugChar(char c) -{ - serial_putc(DEBUG_CHANNEL, (int) c); -} |
