From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail-wy0-f177.google.com ([74.125.82.177]) by canuck.infradead.org with esmtps (Exim 4.72 #1 (Red Hat Linux)) id 1Q6UVh-0006eE-QI for barebox@lists.infradead.org; Sun, 03 Apr 2011 21:07:02 +0000 Received: by wyb28 with SMTP id 28so5118575wyb.36 for ; Sun, 03 Apr 2011 14:06:59 -0700 (PDT) From: franck.jullien@gmail.com Date: Sun, 3 Apr 2011 23:07:17 +0200 Message-Id: <1301864837-10139-1-git-send-email-franck.jullien@gmail.com> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: barebox-bounces@lists.infradead.org Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH] [v2] Nios2: Add Altera UART driver To: barebox@lists.infradead.org From: Franck JULLIEN This patch adds Altera UART driver. Kconfig and Makefile are updated to include this new driver. Signed-off-by: Franck JULLIEN --- drivers/serial/Kconfig | 5 ++ drivers/serial/Makefile | 3 +- drivers/serial/serial_altera.c | 95 ++++++++++++++++++++++++++++++++++++++++ 3 files changed, 102 insertions(+), 1 deletions(-) create mode 100644 drivers/serial/serial_altera.c diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig index ffd877a..9e05f4b 100644 --- a/drivers/serial/Kconfig +++ b/drivers/serial/Kconfig @@ -43,6 +43,11 @@ config DRIVER_SERIAL_BLACKFIN default y bool "Blackfin serial driver" +config DRIVER_SERIAL_ALTERA + depends on NIOS2 + default y + bool "Altera serial driver" + config DRIVER_SERIAL_NS16550 default n bool "NS16550 serial driver" diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile index 9f0e12b..df9e705 100644 --- a/drivers/serial/Makefile +++ b/drivers/serial/Makefile @@ -5,7 +5,7 @@ # serial_pl010.o # serial_xuartlite.o obj-$(CONFIG_DRIVER_SERIAL_ARM_DCC) += arm_dcc.o -obj-$(CONFIG_SERIAL_AMBA_PL011) += amba-pl011.o +obj-$(CONFIG_SERIAL_AMBA_PL011) += amba-pl011.o obj-$(CONFIG_DRIVER_SERIAL_IMX) += serial_imx.o obj-$(CONFIG_DRIVER_SERIAL_STM378X) += stm-serial.o obj-$(CONFIG_DRIVER_SERIAL_ATMEL) += atmel.o @@ -16,3 +16,4 @@ obj-$(CONFIG_DRIVER_SERIAL_BLACKFIN) += serial_blackfin.o obj-$(CONFIG_DRIVER_SERIAL_NS16550) += serial_ns16550.o obj-$(CONFIG_DRIVER_SERIAL_PL010) += serial_pl010.o obj-$(CONFIG_DRIVER_SERIAL_S3C24X0) += serial_s3c24x0.o +obj-$(CONFIG_DRIVER_SERIAL_ALTERA) += serial_altera.o diff --git a/drivers/serial/serial_altera.c b/drivers/serial/serial_altera.c new file mode 100644 index 0000000..54c7178 --- /dev/null +++ b/drivers/serial/serial_altera.c @@ -0,0 +1,95 @@ +/* + * (C) Copyright 2011, Franck JULLIEN, + * + * 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 +#include +#include +#include +#include +#include + +static int altera_serial_setbaudrate(struct console_device *cdev, int baudrate) +{ + struct nios_uart *uart = (struct nios_uart *)cdev->dev->map_base; + uint16_t div; + + div = (CPU_FREQ / baudrate) - 1; + writew(div, &uart->divisor); + + return 0; +} + +static void altera_serial_putc(struct console_device *cdev, char c) +{ + struct nios_uart *uart = (struct nios_uart *)cdev->dev->map_base; + + while ((readw(&uart->status) & NIOS_UART_TRDY) == 0); + + writew(c, &uart->txdata); +} + +static int altera_serial_tstc(struct console_device *cdev) +{ + struct nios_uart *uart = (struct nios_uart *)cdev->dev->map_base; + + return readw(&uart->status) & NIOS_UART_RRDY; +} + +static int altera_serial_getc(struct console_device *cdev) +{ + struct nios_uart *uart = (struct nios_uart *)cdev->dev->map_base; + + while (altera_serial_tstc(cdev) == 0); + + return readw(&uart->rxdata) & 0x000000FF; +} + +static int altera_serial_probe(struct device_d *dev) +{ + struct console_device *cdev; + + cdev = xmalloc(sizeof(struct console_device)); + dev->type_data = cdev; + cdev->dev = dev; + cdev->f_caps = CONSOLE_STDIN | CONSOLE_STDOUT | CONSOLE_STDERR; + cdev->tstc = altera_serial_tstc; + cdev->putc = altera_serial_putc; + cdev->getc = altera_serial_getc; + cdev->setbrg = altera_serial_setbaudrate; + + console_register(cdev); + + return 0; +} + +static struct driver_d altera_serial_driver = { + .name = "altera_serial", + .probe = altera_serial_probe, +}; + +static int altera_serial_init(void) +{ + return register_driver(&altera_serial_driver); +} + +console_initcall(altera_serial_init); + -- 1.7.0.4 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox