at91rm9200: move serial driver to drivers/serial

add CONFIG_AT91RM9200_USART to activate the driver

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

1 files changed, 113 insertions, 0 deletions

diff --git a/drivers/serial/at91rm9200_usart.c b/drivers/serial/at91rm9200_usart.c
new file mode 100644
index 0000000..d563445
--- /dev/null
+++ b/drivers/serial/at91rm9200_usart.c
@@ -0,0 +1,113 @@
+/*
+ * (C) Copyright 2002
+ * Lineo, Inc <www.lineo.com>
+ * Bernhard Kuhn <bkuhn@lineo.com>
+ *
+ * (C) Copyright 2002
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Marius Groeger <mgroeger@sysgo.de>
+ *
+ * (C) Copyright 2002
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Alex Zuepke <azu@sysgo.de>
+ *
+ * Copyright (C) 1999 2000 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl)
+ *
+ * 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/io.h>
+#include <asm/arch/hardware.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#if !defined(CONFIG_DBGU) && !defined(CONFIG_USART0) && !defined(CONFIG_USART1)
+#error must define one of CONFIG_DBGU or CONFIG_USART0 or CONFIG_USART1
+#endif
+
+/* ggi thunder */
+#ifdef CONFIG_DBGU
+AT91PS_USART us = (AT91PS_USART) AT91C_BASE_DBGU;
+#endif
+#ifdef CONFIG_USART0
+AT91PS_USART us = (AT91PS_USART) AT91C_BASE_US0;
+#endif
+#ifdef CONFIG_USART1
+AT91PS_USART us = (AT91PS_USART) AT91C_BASE_US1;
+#endif
+
+void serial_setbrg (void)
+{
+	int baudrate;
+
+	if ((baudrate = gd->baudrate) <= 0)
+		baudrate = CONFIG_BAUDRATE;
+	/* MASTER_CLOCK/(16 * baudrate) */
+	us->US_BRGR = (AT91C_MASTER_CLOCK >> 4) / (unsigned)baudrate;
+}
+
+int serial_init (void)
+{
+	/* make any port initializations specific to this port */
+#ifdef CONFIG_DBGU
+	*AT91C_PIOA_PDR = AT91C_PA31_DTXD | AT91C_PA30_DRXD;	/* PA 31 & 30 */
+	*AT91C_PMC_PCER = 1 << AT91C_ID_SYS;	/* enable clock */
+#endif
+#ifdef CONFIG_USART0
+	*AT91C_PIOA_PDR = AT91C_PA17_TXD0 | AT91C_PA18_RXD0;
+	*AT91C_PMC_PCER |= 1 << AT91C_ID_USART0;	/* enable clock */
+#endif
+#ifdef CONFIG_USART1
+	*AT91C_PIOB_PDR = AT91C_PB21_TXD1 | AT91C_PB20_RXD1;
+	*AT91C_PMC_PCER |= 1 << AT91C_ID_USART1;	/* enable clock */
+#endif
+	serial_setbrg ();
+
+	us->US_CR = AT91C_US_RSTRX | AT91C_US_RSTTX;
+	us->US_CR = AT91C_US_RXEN | AT91C_US_TXEN;
+	us->US_MR =
+		(AT91C_US_CLKS_CLOCK | AT91C_US_CHRL_8_BITS |
+		 AT91C_US_PAR_NONE | AT91C_US_NBSTOP_1_BIT);
+	us->US_IMR = ~0ul;
+	return (0);
+}
+
+void serial_putc (const char c)
+{
+	if (c == '\n')
+		serial_putc ('\r');
+	while ((us->US_CSR & AT91C_US_TXRDY) == 0);
+	us->US_THR = c;
+}
+
+void serial_puts (const char *s)
+{
+	while (*s) {
+		serial_putc (*s++);
+	}
+}
+
+int serial_getc (void)
+{
+	while ((us->US_CSR & AT91C_US_RXRDY) == 0);
+	return us->US_RHR;
+}
+
+int serial_tstc (void)
+{
+	return ((us->US_CSR & AT91C_US_RXRDY) == AT91C_US_RXRDY);
+}