From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from relay1-v.mail.gandi.net ([217.70.178.75]) by bombadil.infradead.org with esmtp (Exim 4.69 #1 (Red Hat Linux)) id 1NUmWS-0005n2-0M for barebox@lists.infradead.org; Tue, 12 Jan 2010 19:35:29 +0000 Received: from d4rwin.no-ip.org (139.Red-83-38-127.dynamicIP.rima-tde.net [83.38.127.139]) by relay1-v.mail.gandi.net (Postfix) with ESMTP id 3F705362AF for ; Tue, 12 Jan 2010 20:35:18 +0100 (CET) Date: Tue, 12 Jan 2010 20:30:51 +0100 From: Matthias Kaehlcke Message-ID: <20100112193051.GP14051@darwin> MIME-Version: 1.0 Content-Disposition: inline List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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 4/5] Add PrimeCell PL010 serial driver To: barebox@lists.infradead.org Added driver for ARM PrimeCell PL010 UART Signed-off-by: Matthias Kaehlcke --- drivers/serial/Kconfig | 7 ++ drivers/serial/Makefile | 2 +- drivers/serial/serial_pl010.c | 172 +++++++++++++++++++++++++++++++++++++++++ drivers/serial/serial_pl010.h | 100 ++++++++++++++++++++++++ 4 files changed, 280 insertions(+), 1 deletions(-) create mode 100644 drivers/serial/serial_pl010.c create mode 100644 drivers/serial/serial_pl010.h diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig index b0ff5fa..8a5056b 100644 --- a/drivers/serial/Kconfig +++ b/drivers/serial/Kconfig @@ -47,6 +47,13 @@ config DRIVER_SERIAL_NS16550_OMAP_EXTENSIONS help Say Y here if you are using OMAP extensions to NS16550 +config DRIVER_SERIAL_PL010 + depends on ARCH_EP93XX + default y + bool "ARM AMBA PL010 support" + help + Enable this to get support for AMBA PL010 based serial devices + config DRIVER_SERIAL_S3C24X0 bool "Samsung S3C24X0 serial driver" depends on ARCH_S3C24xx diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile index 8ab680d..9f203bb 100644 --- a/drivers/serial/Makefile +++ b/drivers/serial/Makefile @@ -3,7 +3,6 @@ # s3c4510b_uart.o # serial_max3100.o # serial_pl010.o -# serial_pl011.o # serial_xuartlite.o obj-$(CONFIG_DRIVER_SERIAL_ARM_DCC) += arm_dcc.o obj-$(CONFIG_DRIVER_SERIAL_IMX) += serial_imx.o @@ -13,4 +12,5 @@ obj-$(CONFIG_DRIVER_SERIAL_LINUX_COMSOLE) += linux_console.o obj-$(CONFIG_DRIVER_SERIAL_MPC5XXX) += serial_mpc5xxx.o 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 diff --git a/drivers/serial/serial_pl010.c b/drivers/serial/serial_pl010.c new file mode 100644 index 0000000..1a6366f --- /dev/null +++ b/drivers/serial/serial_pl010.c @@ -0,0 +1,172 @@ +/* + * Copyright (C) 2010 Matthias Kaehlcke + * + * (C) Copyright 2000 + * Rob Taylor, Flying Pig Systems. robt@flyingpig.com. + * + * (C) Copyright 2004 + * ARM Ltd. + * Philippe Robin, + * + * 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 + */ + +/* Simple U-Boot driver for the PrimeCell PL010/PL011 UARTs */ + +#include +#include +#include +#include +#include "serial_pl010.h" + +static int pl010_setbaudrate(struct console_device *cdev, int baudrate) +{ + struct pl010_struct *pl010 = (struct pl010_struct *)cdev->dev->map_base; + unsigned int divisor; + + switch (baudrate) { + case 9600: + divisor = UART_PL010_BAUD_9600; + break; + + case 19200: + divisor = UART_PL010_BAUD_9600; + break; + + case 38400: + divisor = UART_PL010_BAUD_38400; + break; + + case 57600: + divisor = UART_PL010_BAUD_57600; + break; + + case 115200: + divisor = UART_PL010_BAUD_115200; + break; + + default: + divisor = UART_PL010_BAUD_38400; + } + + writel((divisor & 0xf00) >> 8, &pl010->linctrlmid); + writel(divisor & 0xff, &pl010->linctrllow); + + /* high register must always be written */ + writel(readl(&pl010->linctrlhigh), &pl010->linctrlhigh); + + return 0; +} + +static int pl010_init_port(struct console_device *cdev) +{ + struct pl010_struct *pl010 = (struct pl010_struct *)cdev->dev->map_base; + + /* + * First, disable everything. + */ + writel(0x00, &pl010->ctrl); + + /* + * Set the UART to be 8 bits, 1 stop bit, no parity, fifo enabled. + */ + writel(UART_PL010_LCRH_WLEN_8 | UART_PL010_LCRH_FEN, + &pl010->linctrlhigh); + + /* + * Finally, enable the UART + */ + writel(UART_PL010_CR_UARTEN, &pl010->ctrl); + + return 0; +} + +static void pl010_putc(struct console_device *cdev, char c) +{ + struct pl010_struct *pl010 = (struct pl010_struct *)cdev->dev->map_base; + + /* Wait until there is space in the FIFO */ + while (readl(&pl010->flag) & UART_PL010_FR_TXFF) + ; /* noop */ + + /* Send the character */ + writel(c, &pl010->data); +} + +static int pl010_getc(struct console_device *cdev) +{ + struct pl010_struct *pl010 = (struct pl010_struct *)cdev->dev->map_base; + unsigned int data; + + /* Wait until there is data in the FIFO */ + while (readl(&pl010->flag) & UART_PL010_FR_RXFE) + ; /* noop */ + + data = readl(&pl010->data); + + /* Check for an error flag */ + if (data & 0xFFFFFF00) { + /* Clear the error */ + writel(0xFFFFFFFF, &pl010->errclr); + return -1; + } + + return (int)data; +} + +static int pl010_tstc(struct console_device *cdev) +{ + struct pl010_struct *pl010 = (struct pl010_struct *)cdev->dev->map_base; + + return !(readl(&pl010->flag) & UART_PL010_FR_RXFE); +} + +static int pl010_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 = pl010_tstc; + cdev->putc = pl010_putc; + cdev->getc = pl010_getc; + cdev->setbrg = pl010_setbaudrate; + + pl010_init_port(cdev); + + console_register(cdev); + + return 0; +} + +static struct driver_d pl010_driver = { + .name = "pl010_serial", + .probe = pl010_probe, +}; + +static int pl010_init(void) +{ + register_driver(&pl010_driver); + + return 0; +} + +console_initcall(pl010_init); diff --git a/drivers/serial/serial_pl010.h b/drivers/serial/serial_pl010.h new file mode 100644 index 0000000..6124e0e --- /dev/null +++ b/drivers/serial/serial_pl010.h @@ -0,0 +1,100 @@ +/* + * Copyright (C) 2010 Matthias Kaehlcke + * + * (C) Copyright 2003, 2004 + * ARM Ltd. + * Philippe Robin, + * + * 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 + */ + +struct hldc_struct { + uint32_t ctrl; + uint32_t addmtchval; + uint32_t addmask; + uint32_t rxinfobuf; + uint32_t sts; +}; + +struct pl010_struct { + uint32_t data; + union { + uint32_t rxsts; + uint32_t errclr; + }; + uint32_t linctrlhigh; + uint32_t linctrlmid; + uint32_t linctrllow; + uint32_t ctrl; + uint32_t flag; + union { + uint32_t intid; + uint32_t intclr; + }; + uint32_t not_used0[2]; + uint32_t dmactrl; + uint32_t not_used1[53]; + uint32_t modemctrl; + uint32_t modemsts; + uint32_t not_used2[65]; + struct hldc_struct hldc; +}; + +#define UART_PL010_RSR_OE (1 << 3) +#define UART_PL010_RSR_BE (1 << 2) +#define UART_PL010_RSR_PE (1 << 1) +#define UART_PL010_RSR_FE (1 << 0) + +#define UART_PL010_FR_TXFE (1 << 7) +#define UART_PL010_FR_RXFF (1 << 6) +#define UART_PL010_FR_TXFF (1 << 5) +#define UART_PL010_FR_RXFE (1 << 4) +#define UART_PL010_FR_BUSY (1 << 3) +#define UART_PL010_FR_TMSK (UART_PL010_FR_TXFF + UART_PL010_FR_BUSY) + +#define UART_PL010_CR_LPE (1 << 7) +#define UART_PL010_CR_RTIE (1 << 6) +#define UART_PL010_CR_TIE (1 << 5) +#define UART_PL010_CR_RIE (1 << 4) +#define UART_PL010_CR_MSIE (1 << 3) +#define UART_PL010_CR_IIRLP (1 << 2) +#define UART_PL010_CR_SIREN (1 << 1) +#define UART_PL010_CR_UARTEN (1 << 0) + +#define UART_PL010_LCRH_WLEN_8 (3 << 5) +#define UART_PL010_LCRH_WLEN_7 (2 << 5) +#define UART_PL010_LCRH_WLEN_6 (1 << 5) +#define UART_PL010_LCRH_WLEN_5 (0 << 5) +#define UART_PL010_LCRH_FEN (1 << 4) +#define UART_PL010_LCRH_STP2 (1 << 3) +#define UART_PL010_LCRH_EPS (1 << 2) +#define UART_PL010_LCRH_PEN (1 << 1) +#define UART_PL010_LCRH_BRK (1 << 0) + +#define UART_PL010_BAUD_460800 1 +#define UART_PL010_BAUD_230400 3 +#define UART_PL010_BAUD_115200 7 +#define UART_PL010_BAUD_57600 15 +#define UART_PL010_BAUD_38400 23 +#define UART_PL010_BAUD_19200 47 +#define UART_PL010_BAUD_14400 63 +#define UART_PL010_BAUD_9600 95 +#define UART_PL010_BAUD_4800 191 +#define UART_PL010_BAUD_2400 383 +#define UART_PL010_BAUD_1200 767 -- 1.6.3.1 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox