summaryrefslogtreecommitdiff
path: root/cpu/leon3/serial.c
diff options
context:
space:
mode:
Diffstat (limited to 'cpu/leon3/serial.c')
-rw-r--r--cpu/leon3/serial.c139
1 files changed, 0 insertions, 139 deletions
diff --git a/cpu/leon3/serial.c b/cpu/leon3/serial.c
deleted file mode 100644
index 4b2fcb8667..0000000000
--- a/cpu/leon3/serial.c
+++ /dev/null
@@ -1,139 +0,0 @@
-/* GRLIB APBUART Serial controller driver
- *
- * (C) Copyright 2007
- * Daniel Hellstrom, Gaisler Research, daniel@gaisler.com.
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * 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 <asm/processor.h>
-#include <asm/leon.h>
-#include <ambapp.h>
-
-DECLARE_GLOBAL_DATA_PTR;
-
-/* Force cache miss each time a serial controller reg is read */
-#define CACHE_BYPASS 1
-
-#ifdef CACHE_BYPASS
-#define READ_BYTE(var) SPARC_NOCACHE_READ_BYTE((unsigned int)&(var))
-#define READ_HWORD(var) SPARC_NOCACHE_READ_HWORD((unsigned int)&(var))
-#define READ_WORD(var) SPARC_NOCACHE_READ((unsigned int)&(var))
-#define READ_DWORD(var) SPARC_NOCACHE_READ_DWORD((unsigned int)&(var))
-#endif
-
-ambapp_dev_apbuart *leon3_apbuart = NULL;
-
-int serial_init(void)
-{
- ambapp_apbdev apbdev;
- unsigned int tmp;
-
- /* find UART */
- if (ambapp_apb_first(VENDOR_GAISLER, GAISLER_APBUART, &apbdev) == 1) {
-
- leon3_apbuart = (ambapp_dev_apbuart *) apbdev.address;
-
- /* found apbuart, let's init...
- *
- * Set scaler / baud rate
- *
- * Receiver & transmitter enable
- */
- leon3_apbuart->scaler = CONFIG_SYS_GRLIB_APBUART_SCALER;
-
- /* Let bit 11 be unchanged (debug bit for GRMON) */
- tmp = READ_WORD(leon3_apbuart->ctrl);
-
- leon3_apbuart->ctrl = ((tmp & LEON_REG_UART_CTRL_DBG) |
- LEON_REG_UART_CTRL_RE |
- LEON_REG_UART_CTRL_TE);
-
- return 0;
- }
- return -1; /* didn't find hardware */
-}
-
-void serial_putc(const char c)
-{
- if (c == '\n')
- serial_putc_raw('\r');
-
- serial_putc_raw(c);
-}
-
-void serial_putc_raw(const char c)
-{
- if (!leon3_apbuart)
- return;
-
- /* Wait for last character to go. */
- while (!(READ_WORD(leon3_apbuart->status) & LEON_REG_UART_STATUS_THE)) ;
-
- /* Send data */
- leon3_apbuart->data = c;
-
-#ifdef LEON_DEBUG
- /* Wait for data to be sent */
- while (!(READ_WORD(leon3_apbuart->status) & LEON_REG_UART_STATUS_TSE)) ;
-#endif
-}
-
-void serial_puts(const char *s)
-{
- while (*s) {
- serial_putc(*s++);
- }
-}
-
-int serial_getc(void)
-{
- if (!leon3_apbuart)
- return 0;
-
- /* Wait for a character to arrive. */
- while (!(READ_WORD(leon3_apbuart->status) & LEON_REG_UART_STATUS_DR)) ;
-
- /* read data */
- return READ_WORD(leon3_apbuart->data);
-}
-
-int serial_tstc(void)
-{
- if (leon3_apbuart)
- return (READ_WORD(leon3_apbuart->status) &
- LEON_REG_UART_STATUS_DR);
- return 0;
-}
-
-/* set baud rate for uart */
-void serial_setbrg(void)
-{
- /* update baud rate settings, read it from gd->baudrate */
- unsigned int scaler;
- if (leon3_apbuart && (gd->baudrate > 0)) {
- scaler =
- (((CONFIG_SYS_CLK_FREQ * 10) / (gd->baudrate * 8)) -
- 5) / 10;
- leon3_apbuart->scaler = scaler;
- }
- return;
-}