This patch adds the UART driver for the upcoming VCTH board support.
Signed-off-by: Stefan Roese <[EMAIL PROTECTED]>
---
drivers/serial/Makefile | 1 +
drivers/serial/vcth.c | 121 +++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 122 insertions(+), 0 deletions(-)
create mode 100755 drivers/serial/vcth.c
diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile
index eafe543..17235ff 100644
--- a/drivers/serial/Makefile
+++ b/drivers/serial/Makefile
@@ -38,6 +38,7 @@ COBJS-$(CONFIG_PL011_SERIAL) += serial_pl01x.o
COBJS-$(CONFIG_XILINX_UARTLITE) += serial_xuartlite.o
COBJS-$(CONFIG_SCIF_CONSOLE) += serial_sh.o
COBJS-$(CONFIG_USB_TTY) += usbtty.o
+COBJS-$(CONFIG_VCTH_SERIAL) += vcth.o
COBJS := $(sort $(COBJS-y))
SRCS := $(COBJS:.o=.c)
diff --git a/drivers/serial/vcth.c b/drivers/serial/vcth.c
new file mode 100755
index 0000000..2c847d0
--- /dev/null
+++ b/drivers/serial/vcth.c
@@ -0,0 +1,121 @@
+/*
+ * (C) Copyright 2008 Stefan Roese <[EMAIL PROTECTED]>, DENX Software
Engineering
+ *
+ * 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 <config.h>
+#include <common.h>
+#include <asm/io.h>
+
+#define UART_1_BASE 0xBF89C000
+
+#define UART_RBR_OFF 0x00 /* receiver buffer reg
*/
+#define UART_THR_OFF 0x00 /* transmit holding reg
*/
+#define UART_DLL_OFF 0x00 /* divisor latch low reg
*/
+#define UART_IER_OFF 0x04 /* interrupt enable reg
*/
+#define UART_DLH_OFF 0x04 /* receiver buffer reg
*/
+#define UART_FCR_OFF 0x08 /* fifo control register
*/
+#define UART_LCR_OFF 0x0c /* line control register
*/
+#define UART_MCR_OFF 0x10 /* modem control register
*/
+#define UART_LSR_OFF 0x14 /* line status register
*/
+#define UART_MSR_OFF 0x18 /* modem status register
*/
+#define UART_SCR_OFF 0x1c /* scratch pad register
*/
+
+#define UART_RCV_DATA_RDY 0x01 /* Data Received */
+#define UART_XMT_HOLD_EMPTY 0x20
+#define UART_TRANSMIT_EMPTY 0x40
+
+/* 7 bit on line control reg. enalbing rw to dll and dlh */
+#define UART_LCR_DLAB 0x0080
+
+#define UART___9600_BDR 0x84
+#define UART__19200_BDR 0x42
+#define UART_115200_BDR 0x08
+
+#define UART_DIS_ALL_INTER 0x00 /* disable all interrupts */
+
+#define UART_5DATA_BITS 0x0000 /* 5 [bits] 1.5 bits 2
*/
+#define UART_6DATA_BITS 0x0001 /* 6 [bits] 1 bits 2
*/
+#define UART_7DATA_BITS 0x0002 /* 7 [bits] 1 bits 2
*/
+#define UART_8DATA_BITS 0x0003 /* 8 [bits] 1 bits 2
*/
+
+static void vcth_uart_set_baud_rate(u32 address, u32 dh, u32 dl)
+{
+ u32 val = __raw_readl(UART_1_BASE + UART_LCR_OFF);
+
+ /* set 7 bit on 1 */
+ val |= UART_LCR_DLAB;
+ __raw_writel(val, UART_1_BASE + UART_LCR_OFF);
+
+ __raw_writel(dl, UART_1_BASE + UART_DLL_OFF);
+ __raw_writel(dh, UART_1_BASE + UART_DLH_OFF);
+
+ /* set 7 bit on 0 */
+ val &= ~UART_LCR_DLAB;
+ __raw_writel(val, UART_1_BASE + UART_LCR_OFF);
+
+ return;
+}
+
+int serial_init(void)
+{
+ __raw_writel(UART_DIS_ALL_INTER, UART_1_BASE + UART_IER_OFF);
+ vcth_uart_set_baud_rate(UART_1_BASE, 0, UART_115200_BDR);
+ __raw_writel(UART_8DATA_BITS, UART_1_BASE + UART_LCR_OFF);
+
+ return 0;
+}
+
+void serial_setbrg(void)
+{
+ /*
+ * Baudrate change not supported currently, fixed to 115200 baud
+ */
+}
+
+void serial_putc(const char c)
+{
+ if (c == '\n')
+ serial_putc('\r');
+
+ while (!(UART_XMT_HOLD_EMPTY & __raw_readl(UART_1_BASE + UART_LSR_OFF)))
+ ;
+
+ __raw_writel(c, UART_1_BASE + UART_THR_OFF);
+}
+
+void serial_puts(const char *s)
+{
+ while (*s)
+ serial_putc(*s++);
+}
+
+int serial_getc(void)
+{
+ while (!(UART_RCV_DATA_RDY & __raw_readl(UART_1_BASE + UART_LSR_OFF)))
+ ;
+
+ return __raw_readl(UART_1_BASE + UART_RBR_OFF) & 0xff;
+}
+
+int serial_tstc(void)
+{
+ if (!(UART_RCV_DATA_RDY & __raw_readl(UART_1_BASE + UART_LSR_OFF)))
+ return 0;
+
+ return 1;
+}
--
1.6.0.4
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