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serial: Add Tegra2 serial port support

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Signed-off-by: Tom Warren <twarren@nvidia.com>
This commit is contained in:
Tom Warren 2011-01-27 10:58:06 +00:00 committed by Albert Aribaud
parent 3f82b1d3ab
commit 2ee3678159
5 changed files with 111 additions and 2 deletions
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3
common/serial.c
View file

@ -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;

1
drivers/serial/Makefile
View file

@ -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))

77
drivers/serial/serial_tegra2.c Normal file
View file

@ -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 */
}

29
drivers/serial/serial_tegra2.h Normal file
View file

@ -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_ */

3
include/serial.h
View file

@ -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)