/*
* Copyright (C) 2004-2007 ARM Limited.
* Copyright (C) 2008 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
+ * Copyright (C) 2015 - 2016 Xilinx, Inc, Michal Simek
*
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License version 2
- * as published by the Free Software Foundation.
- *
- * 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
+ * SPDX-License-Identifier: GPL-2.0
*
* As a special exception, if other files instantiate templates or use macros
* or inline functions from this file, or you compile this file and link it
*/
#include <common.h>
+#include <dm.h>
#include <serial.h>
#if defined(CONFIG_CPU_V6) || defined(CONFIG_CPU_V7)
#define status_dcc(x) \
__asm__ volatile ("mrc p14, 0, %0, c14, c0, 0\n" : "=r" (x))
+#elif defined(CONFIG_CPU_ARMV8)
+/*
+ * ARMV8
+ */
+#define DCC_RBIT (1 << 30)
+#define DCC_WBIT (1 << 29)
+
+#define write_dcc(x) \
+ __asm__ volatile ("msr dbgdtrtx_el0, %0\n" : : "r" (x))
+
+#define read_dcc(x) \
+ __asm__ volatile ("mrs %0, dbgdtrrx_el0\n" : "=r" (x))
+
+#define status_dcc(x) \
+ __asm__ volatile ("mrs %0, mdccsr_el0\n" : "=r" (x))
+
#else
#define DCC_RBIT (1 << 0)
#define DCC_WBIT (1 << 1)
#define TIMEOUT_COUNT 0x4000000
-static int arm_dcc_init(void)
-{
- return 0;
-}
-
-static int arm_dcc_getc(void)
+static int arm_dcc_getc(struct udevice *dev)
{
int ch;
register unsigned int reg;
return ch;
}
-static void arm_dcc_putc(char ch)
+static int arm_dcc_putc(struct udevice *dev, char ch)
{
register unsigned int reg;
unsigned int timeout_count = TIMEOUT_COUNT;
break;
}
if (timeout_count == 0)
- return;
+ return -EAGAIN;
else
write_dcc(ch);
+
+ return 0;
}
-static int arm_dcc_tstc(void)
+static int arm_dcc_pending(struct udevice *dev, bool input)
{
register unsigned int reg;
- can_read_dcc(reg);
+ if (input) {
+ can_read_dcc(reg);
+ } else {
+ can_write_dcc(reg);
+ }
return reg;
}
-static void arm_dcc_setbrg(void)
-{
-}
+static const struct dm_serial_ops arm_dcc_ops = {
+ .putc = arm_dcc_putc,
+ .pending = arm_dcc_pending,
+ .getc = arm_dcc_getc,
+};
+
+static const struct udevice_id arm_dcc_ids[] = {
+ { .compatible = "arm,dcc", },
+ { }
+};
-static struct serial_device arm_dcc_drv = {
+U_BOOT_DRIVER(serial_dcc) = {
.name = "arm_dcc",
- .start = arm_dcc_init,
- .stop = NULL,
- .setbrg = arm_dcc_setbrg,
- .putc = arm_dcc_putc,
- .puts = default_serial_puts,
- .getc = arm_dcc_getc,
- .tstc = arm_dcc_tstc,
+ .id = UCLASS_SERIAL,
+ .of_match = arm_dcc_ids,
+ .ops = &arm_dcc_ops,
+ .flags = DM_FLAG_PRE_RELOC,
};
-void arm_dcc_initialize(void)
+#ifdef CONFIG_DEBUG_UART_ARM_DCC
+
+#include <debug_uart.h>
+
+static inline void _debug_uart_init(void)
{
- serial_register(&arm_dcc_drv);
}
-__weak struct serial_device *default_serial_console(void)
+static inline void _debug_uart_putc(int ch)
{
- return &arm_dcc_drv;
+ arm_dcc_putc(NULL, ch);
}
+
+DEBUG_UART_FUNCS
+#endif