On Mon, Nov 14, 2016 at 12:50:14AM +0300, Antony Pavlov wrote: > Signed-off-by: Antony Pavlov <[email protected]> > --- > > TODO: > > * add speed setup support. > > drivers/serial/Kconfig | 3 ++ > drivers/serial/Makefile | 1 + > drivers/serial/serial_sifive.c | 109 > +++++++++++++++++++++++++++++++++++++++++ > 3 files changed, 113 insertions(+) > > diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig > index b112d7e..70509b9 100644 > --- a/drivers/serial/Kconfig > +++ b/drivers/serial/Kconfig > @@ -117,6 +117,9 @@ config DRIVER_SERIAL_S3C_AUTOSYNC > Say Y here if you want to use the auto flow feature of this > UART. RTS and CTS will be handled by the hardware when enabled. > > +config DRIVER_SERIAL_SIFIVE > + bool "SiFive serial driver" > + > config DRIVER_SERIAL_PXA > bool "PXA serial driver" > depends on ARCH_PXA > diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile > index 189e777..368e992 100644 > --- a/drivers/serial/Makefile > +++ b/drivers/serial/Makefile > @@ -20,3 +20,4 @@ obj-$(CONFIG_DRIVER_SERIAL_AUART) += > serial_auart.o > obj-$(CONFIG_DRIVER_SERIAL_CADENCE) += serial_cadence.o > obj-$(CONFIG_DRIVER_SERIAL_EFI_STDIO) += efi-stdio.o > obj-$(CONFIG_DRIVER_SERIAL_DIGIC) += serial_digic.o > +obj-$(CONFIG_DRIVER_SERIAL_SIFIVE) += serial_sifive.o > diff --git a/drivers/serial/serial_sifive.c b/drivers/serial/serial_sifive.c > new file mode 100644 > index 0000000..06e3521 > --- /dev/null > +++ b/drivers/serial/serial_sifive.c > @@ -0,0 +1,109 @@ > +/* > + * Copyright (C) 2016 Antony Pavlov <[email protected]> > + * > + * This file is part of barebox. > + * 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 version 2 > + * as published by the Free Software Foundation. > + * > + * 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. > + * > + */ > + > +#include <common.h> > +#include <init.h> > +#include <malloc.h> > +#include <io.h> > + > +#define UART_RX_OFFSET 0 > +#define UART_TX_OFFSET 0 > +#define UART_TX_COUNT_OFFSET 0x4 > +#define UART_RX_COUNT_OFFSET 0x8 > +#define UART_DIVIDER_OFFSET 0xC > + > +static inline uint32_t sifive_serial_readl(struct console_device *cdev, > + uint32_t offset) > +{ > + void __iomem *base = cdev->dev->priv; > + > + return readl(base + offset); > +} > + > +static inline void sifive_serial_writel(struct console_device *cdev, > + uint32_t value, uint32_t offset) > +{ > + void __iomem *base = cdev->dev->priv; > + > + writel(value, base + offset); > +} > + > +static int sifive_serial_setbaudrate(struct console_device *cdev, int > baudrate) > +{ > + /* FIXME: no baudrate setup at the momement :( */ > + > + return 0; > +} > + > +static void sifive_serial_putc(struct console_device *cdev, char c) > +{ > + sifive_serial_writel(cdev, c, UART_TX_OFFSET); > +}
This doesn't test if there is space in the FIFO. This is necessary, no? Sascha -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ barebox mailing list [email protected] http://lists.infradead.org/mailman/listinfo/barebox
