From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail-ww0-f41.google.com ([74.125.82.41]) by canuck.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1QSwXR-0003qq-Gm for barebox@lists.infradead.org; Sat, 04 Jun 2011 19:29:38 +0000 Received: by wwi18 with SMTP id 18so455601wwi.0 for ; Sat, 04 Jun 2011 12:29:33 -0700 (PDT) From: franck.jullien@gmail.com Date: Sat, 4 Jun 2011 21:29:29 +0200 Message-Id: <1307215769-6381-1-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] [Nios2]: Add Altera JTAG UART driver To: barebox@lists.infradead.org From: Franck Jullien Add ALtera JTAG UART driver. Signed-off-by: Franck Jullien --- drivers/serial/Kconfig | 10 +++ drivers/serial/Makefile | 1 + drivers/serial/serial_altera_jtag.c | 106 +++++++++++++++++++++++++++++++++++ 3 files changed, 117 insertions(+), 0 deletions(-) create mode 100644 drivers/serial/serial_altera_jtag.c diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig index 9e05f4b..c8f9ecd 100644 --- a/drivers/serial/Kconfig +++ b/drivers/serial/Kconfig @@ -48,6 +48,16 @@ config DRIVER_SERIAL_ALTERA default y bool "Altera serial driver" +config DRIVER_SERIAL_ALTERA_JTAG + depends on NIOS2 + default n + bool "Altera JTAG serial driver" + +config ALTERA_JTAG_UART_BYPASS + depends on DRIVER_SERIAL_ALTERA_JTAG + default y + bool "Don't block on serial putc if JTAG is not connected" + config DRIVER_SERIAL_NS16550 default n bool "NS16550 serial driver" diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile index df9e705..8b56d15 100644 --- a/drivers/serial/Makefile +++ b/drivers/serial/Makefile @@ -17,3 +17,4 @@ 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 +obj-$(CONFIG_DRIVER_SERIAL_ALTERA_JTAG) += serial_altera_jtag.o diff --git a/drivers/serial/serial_altera_jtag.c b/drivers/serial/serial_altera_jtag.c new file mode 100644 index 0000000..70bc5a9 --- /dev/null +++ b/drivers/serial/serial_altera_jtag.c @@ -0,0 +1,106 @@ +/* + * (C) Copyright 2004, Psyent Corporation + * Scott McNutt + * + * (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_jtag_setbaudrate(struct console_device *cdev, int baudrate) +{ + return 0; +} + +static void altera_serial_jtag_putc(struct console_device *cdev, char c) +{ + struct nios_jtag *jtag = (struct nios_jtag *)cdev->dev->map_base; + uint32_t st; + + while (1) { + st = readl(&jtag->control); + if (NIOS_JTAG_WSPACE(st)) + break; +#ifdef CONFIG_ALTERA_JTAG_UART_BYPASS + if (!(st & NIOS_JTAG_AC)) /* no connection */ + return; +#endif + } + + writel(c, &jtag->data); +} + +static int altera_serial_jtag_tstc(struct console_device *cdev) +{ + struct nios_jtag *jtag = (struct nios_jtag *)cdev->dev->map_base; + + return readl(&jtag->control) & NIOS_JTAG_RRDY; +} + +static int altera_serial_jtag_getc(struct console_device *cdev) +{ + struct nios_jtag *jtag = (struct nios_jtag *)cdev->dev->map_base; + uint32_t val; + + while (1) { + val = readl(&jtag->data); + if (val & NIOS_JTAG_RVALID) + break; + } + + return val & 0xFF; +} + +static int altera_serial_jtag_probe(struct device_d *dev) { + + struct console_device *cdev; + + cdev = malloc(sizeof(struct console_device)); + dev->type_data = cdev; + cdev->dev = dev; + cdev->f_caps = CONSOLE_STDIN | CONSOLE_STDOUT | CONSOLE_STDERR; + cdev->tstc = altera_serial_jtag_tstc; + cdev->putc = altera_serial_jtag_putc; + cdev->getc = altera_serial_jtag_getc; + cdev->setbrg = altera_serial_jtag_setbaudrate; + + console_register(cdev); + + return 0; +} + +static struct driver_d altera_serial_jtag_driver = { + .name = "altera_serial_jtag", + .probe = altera_serial_jtag_probe, +}; + +static int altera_serial_jtag_init(void) +{ + return register_driver(&altera_serial_jtag_driver); +} + +console_initcall(altera_serial_jtag_init); + -- 1.7.0.4 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox