serial: Add Tegra2 serial port support

Signed-off-by: Tom Warren <twarren@nvidia.com>

diff --git a/common/serial.c b/common/serial.c
index 051ae4e1d22d2880446dd9e87e69df501b6a8fa1..8ebf9a5d2ed08c3d0a4ace6334ab590cd3c49807 100644 (file)
--- a/common/serial.c
+++ b/common/serial.c
@@ -41,7 +41,8 @@ struct serial_device *__default_serial_console (void)
 #elif defined(CONFIG_4xx) \
    || defined(CONFIG_MB86R0x) || defined(CONFIG_MPC5xxx) \
    || defined(CONFIG_MPC83xx) || defined(CONFIG_MPC85xx) \
-   || defined(CONFIG_MPC86xx) || defined(CONFIG_SYS_SC520)
+   || defined(CONFIG_MPC86xx) || defined(CONFIG_SYS_SC520) \
+   || defined(CONFIG_TEGRA2)
 #if defined(CONFIG_CONS_INDEX) && defined(CONFIG_SYS_NS16550_SERIAL)
 #if (CONFIG_CONS_INDEX==1)
        return &eserial1_device;

diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile
index 7d221fc40d970b9b3fd2d34cf06b6c89973b8af0..5a6011e90560408f3da980d47a2832e5f40c7da7 100644 (file)
--- a/drivers/serial/Makefile
+++ b/drivers/serial/Makefile
@@ -55,6 +55,7 @@ COBJS-$(CONFIG_S3C24X0_SERIAL) += serial_s3c24x0.o
 COBJS-$(CONFIG_S3C44B0_SERIAL) += serial_s3c44b0.o
 COBJS-$(CONFIG_XILINX_UARTLITE) += serial_xuartlite.o
 COBJS-$(CONFIG_SCIF_CONSOLE) += serial_sh.o
+COBJS-$(CONFIG_TEGRA2) += serial_tegra2.o
 COBJS-$(CONFIG_USB_TTY) += usbtty.o
 
 COBJS  := $(sort $(COBJS-y))

diff --git a/drivers/serial/serial_tegra2.c b/drivers/serial/serial_tegra2.c
new file mode 100644 (file)
index 0000000..8ff34ea
--- /dev/null
+++ b/drivers/serial/serial_tegra2.c
@@ -0,0 +1,77 @@
+/*
+ *  (C) Copyright 2010,2011
+ *  NVIDIA Corporation <www.nvidia.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 <ns16550.h>
+#include <asm/io.h>
+#include <asm/arch/tegra2.h>
+#include "serial_tegra2.h"
+
+static void setup_uart(struct uart_ctlr *u)
+{
+       u32 reg;
+
+       /* Prepare the divisor value */
+       reg = NVRM_PLLP_FIXED_FREQ_KHZ * 1000 / NV_DEFAULT_DEBUG_BAUD / 16;
+
+       /* Set up UART parameters */
+       writel(UART_LCR_DLAB, &u->uart_lcr);
+       writel(reg, &u->uart_thr_dlab_0);
+       writel(0, &u->uart_ier_dlab_0);
+       writel(0, &u->uart_lcr);                        /* clear DLAB */
+       writel((UART_FCR_TRIGGER_3 | UART_FCR_FIFO_EN | \
+               UART_FCR_CLEAR_XMIT | UART_FCR_CLEAR_RCVR), &u->uart_iir_fcr);
+       writel(0, &u->uart_ier_dlab_0);
+       writel(UART_LCR_WLS_8, &u->uart_lcr);   /* 8N1 */
+       writel(UART_MCR_RTS, &u->uart_mcr);
+       writel(0, &u->uart_msr);
+       writel(0, &u->uart_spr);
+       writel(0, &u->uart_irda_csr);
+       writel(0, &u->uart_asr);
+       writel((UART_FCR_TRIGGER_3 | UART_FCR_FIFO_EN), &u->uart_iir_fcr);
+
+       /* Flush any old characters out of the RX FIFO */
+       reg = readl(&u->uart_lsr);
+
+       while (reg & UART_LSR_DR) {
+               reg = readl(&u->uart_thr_dlab_0);
+               reg = readl(&u->uart_lsr);
+       }
+}
+
+/*
+ * Routine: uart_init
+ * Description: init the UART clocks, muxes, and baudrate/parity/etc.
+ */
+void uart_init(void)
+{
+       struct uart_ctlr *uart = (struct uart_ctlr *)NV_PA_APB_UARTD_BASE;
+#if defined(CONFIG_TEGRA2_ENABLE_UARTD)
+       setup_uart(uart);
+#endif /* CONFIG_TEGRA2_ENABLE_UARTD */
+#if defined(CONFIG_TEGRA2_ENABLE_UARTA)
+       uart = (struct uart_ctlr *)NV_PA_APB_UARTA_BASE;
+
+       setup_uart(uart);
+#endif /* CONFIG_TEGRA2_ENABLE_UARTA */
+}

diff --git a/drivers/serial/serial_tegra2.h b/drivers/serial/serial_tegra2.h
new file mode 100644 (file)
index 0000000..5704800
--- /dev/null
+++ b/drivers/serial/serial_tegra2.h
@@ -0,0 +1,29 @@
+/*
+ *  (C) Copyright 2010,2011
+ *  NVIDIA Corporation <www.nvidia.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
+ */
+
+#ifndef _SERIAL_TEGRA_H_
+#define _SERIAL_TEGRA_H_
+
+#include <asm/arch/uart.h>
+
+#endif /* _SERIAL_TEGRA_H_ */

diff --git a/include/serial.h b/include/serial.h
index 15ab73c13d99b97345486b5892c7fc41858b8b84..f21d96171f1455a434680db74fb5c08c499441c4 100644 (file)
--- a/include/serial.h
+++ b/include/serial.h
@@ -27,7 +27,8 @@ extern struct serial_device * default_serial_console (void);
     defined(CONFIG_405EP) || defined(CONFIG_405EZ) || defined(CONFIG_405EX) || \
     defined(CONFIG_MB86R0x) || defined(CONFIG_MPC5xxx) || \
     defined(CONFIG_MPC83xx) || defined(CONFIG_MPC85xx) || \
-    defined(CONFIG_MPC86xx) || defined(CONFIG_SYS_SC520)
+    defined(CONFIG_MPC86xx) || defined(CONFIG_SYS_SC520) || \
+    defined(CONFIG_TEGRA2)
 extern struct serial_device serial0_device;
 extern struct serial_device serial1_device;
 #if defined(CONFIG_SYS_NS16550_SERIAL)