drivers/serial/serial_xuartlite.c

   1 /*
   2  * (C) Copyright 2008 Michal Simek <monstr@monstr.eu>
   3  * Clean driver and add xilinx constant from header file
   4  *
   5  * (C) Copyright 2004 Atmark Techno, Inc.
   6  * Yasushi SHOJI <yashi@atmark-techno.com>
   7  *
   8  * See file CREDITS for list of people who contributed to this
   9  * project.
  10  *
  11  * This program is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU General Public License as
  13  * published by the Free Software Foundation; either version 2 of
  14  * the License, or (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  24  * MA 02111-1307 USA
  25  */
  26
  27 #include <config.h>
  28 #include <asm/io.h>
  29
  30 #define RX_FIFO_OFFSET          0 /* receive FIFO, read only */
  31 #define TX_FIFO_OFFSET          4 /* transmit FIFO, write only */
  32 #define STATUS_REG_OFFSET       8 /* status register, read only */
  33
  34 #define SR_TX_FIFO_FULL         0x08 /* transmit FIFO full */
  35 #define SR_RX_FIFO_VALID_DATA   0x01 /* data in receive FIFO */
  36 #define SR_RX_FIFO_FULL         0x02 /* receive FIFO full */
  37
  38 #define UARTLITE_STATUS         (CONFIG_SERIAL_BASE + STATUS_REG_OFFSET)
  39 #define UARTLITE_TX_FIFO        (CONFIG_SERIAL_BASE + TX_FIFO_OFFSET)
  40 #define UARTLITE_RX_FIFO        (CONFIG_SERIAL_BASE + RX_FIFO_OFFSET)
  41
  42 int serial_init(void)
  43 {
  44         /* FIXME: Nothing for now. We should initialize fifo, etc */
  45         return 0;
  46 }
  47
  48 void serial_setbrg(void)
  49 {
  50         /* FIXME: what's this for? */
  51 }
  52
  53 void serial_putc(const char c)
  54 {
  55         if (c == '\n')
  56                 serial_putc('\r');
  57 <<<<<<< .merge_file_kaofiJ
  58         while (in_be32((void *)UARTLITE_STATUS) & SR_TX_FIFO_FULL);
  59         out_be32((void *)UARTLITE_TX_FIFO, (unsigned char) (c & 0xff));
  60 =======
  61         while (in_be32((u32 *) UARTLITE_STATUS) & SR_TX_FIFO_FULL);
  62         out_be32((u32 *) UARTLITE_TX_FIFO, (unsigned char) (c & 0xff));
  63 >>>>>>> .merge_file_zSz9BG
  64 }
  65
  66 void serial_puts(const char * s)
  67 {
  68         while (*s) {
  69                 serial_putc(*s++);
  70         }
  71 }
  72
  73 int serial_getc(void)
  74 {
  75 <<<<<<< .merge_file_kaofiJ
  76         while (!(in_be32((void *)UARTLITE_STATUS) & SR_RX_FIFO_VALID_DATA));
  77         return in_be32((void *)UARTLITE_RX_FIFO) & 0xff;
  78 =======
  79         while (!(in_be32((u32 *) UARTLITE_STATUS) & SR_RX_FIFO_VALID_DATA));
  80         return in_be32((u32 *) UARTLITE_RX_FIFO) & 0xff;
  81 >>>>>>> .merge_file_zSz9BG
  82 }
  83
  84 int serial_tstc(void)
  85 {
  86 <<<<<<< .merge_file_kaofiJ
  87         return (in_be32((void *)UARTLITE_STATUS) & SR_RX_FIFO_VALID_DATA);
  88 =======
  89         return (in_be32((u32 *) UARTLITE_STATUS) & SR_RX_FIFO_VALID_DATA);
  90 >>>>>>> .merge_file_zSz9BG
  91 }