From: Jean-Christophe PLAGNIOL-VILLARD Date: Sun, 31 May 2009 10:44:27 +0000 (+0200) Subject: lh7a40x: move serial driver to drivers/serial X-Git-Tag: v2009.08-rc1~153^2~82 X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=3ea201b016ab259a5ac8824af767569522768c47;p=oweals%2Fu-boot.git lh7a40x: move serial driver to drivers/serial Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD --- diff --git a/cpu/lh7a40x/Makefile b/cpu/lh7a40x/Makefile index b9ae76effa..1b3f58abb9 100644 --- a/cpu/lh7a40x/Makefile +++ b/cpu/lh7a40x/Makefile @@ -26,7 +26,7 @@ include $(TOPDIR)/config.mk LIB = $(obj)lib$(CPU).a START = start.o -COBJS = cpu.o speed.o serial.o timer.o +COBJS = cpu.o speed.o timer.o SRCS := $(START:.o=.S) $(SOBJS:.o=.S) $(COBJS:.o=.c) OBJS := $(addprefix $(obj),$(SOBJS) $(COBJS)) diff --git a/cpu/lh7a40x/serial.c b/cpu/lh7a40x/serial.c deleted file mode 100644 index 4767489aef..0000000000 --- a/cpu/lh7a40x/serial.c +++ /dev/null @@ -1,184 +0,0 @@ -/* - * (C) Copyright 2002 - * Gary Jennejohn, DENX Software Engineering, - * - * 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 - -DECLARE_GLOBAL_DATA_PTR; - -#if defined(CONFIG_CONSOLE_UART1) -# define UART_CONSOLE 1 -#elif defined(CONFIG_CONSOLE_UART2) -# define UART_CONSOLE 2 -#elif defined(CONFIG_CONSOLE_UART3) -# define UART_CONSOLE 3 -#else -# error "No console configured ... " -#endif - -void serial_setbrg (void) -{ - lh7a40x_uart_t* uart = LH7A40X_UART_PTR(UART_CONSOLE); - int i; - unsigned int reg = 0; - - /* - * userguide 15.1.2.4 - * - * BAUDDIV is (UART_REF_FREQ/(16 X BAUD))-1 - * - * UART_REF_FREQ = external system clock input / 2 (Hz) - * BAUD is desired baudrate (bits/s) - * - * NOTE: we add (divisor/2) to numerator to round for - * more precision - */ - reg = (((get_PLLCLK()/2) + ((16*gd->baudrate)/2)) / (16 * gd->baudrate)) - 1; - uart->brcon = reg; - - for (i = 0; i < 100; i++); -} - -/* - * Initialise the serial port with the given baudrate. The settings - * are always 8 data bits, no parity, 1 stop bit, no start bits. - * - */ -int serial_init (void) -{ - lh7a40x_uart_t* uart = LH7A40X_UART_PTR(UART_CONSOLE); - - /* UART must be enabled before writing to any config registers */ - uart->con |= (UART_EN); - -#ifdef CONFIG_CONSOLE_UART1 - /* infrared disabled */ - uart->con |= UART_SIRD; -#endif - /* loopback disabled */ - uart->con &= ~(UART_LBE); - - /* modem lines and tx/rx polarities */ - uart->con &= ~(UART_MXP | UART_TXP | UART_RXP); - - /* FIFO enable, N81 */ - uart->fcon = (UART_WLEN_8 | UART_FEN | UART_STP2_1); - - /* set baudrate */ - serial_setbrg (); - - /* enable rx interrupt */ - uart->inten |= UART_RI; - - return (0); -} - -/* - * Read a single byte from the serial port. Returns 1 on success, 0 - * otherwise. When the function is succesfull, the character read is - * written into its argument c. - */ -int serial_getc (void) -{ - lh7a40x_uart_t* uart = LH7A40X_UART_PTR(UART_CONSOLE); - - /* wait for character to arrive */ - while (uart->status & UART_RXFE); - - return(uart->data & 0xff); -} - -#ifdef CONFIG_HWFLOW -static int hwflow = 0; /* turned off by default */ -int hwflow_onoff(int on) -{ - switch(on) { - case 0: - default: - break; /* return current */ - case 1: - hwflow = 1; /* turn on */ - break; - case -1: - hwflow = 0; /* turn off */ - break; - } - return hwflow; -} -#endif - -#ifdef CONFIG_MODEM_SUPPORT -static int be_quiet = 0; -void disable_putc(void) -{ - be_quiet = 1; -} - -void enable_putc(void) -{ - be_quiet = 0; -} -#endif - - -/* - * Output a single byte to the serial port. - */ -void serial_putc (const char c) -{ - lh7a40x_uart_t* uart = LH7A40X_UART_PTR(UART_CONSOLE); - -#ifdef CONFIG_MODEM_SUPPORT - if (be_quiet) - return; -#endif - - /* wait for room in the tx FIFO */ - while (!(uart->status & UART_TXFE)); - -#ifdef CONFIG_HWFLOW - /* Wait for CTS up */ - while(hwflow && !(uart->status & UART_CTS)); -#endif - - uart->data = c; - - /* If \n, also do \r */ - if (c == '\n') - serial_putc ('\r'); -} - -/* - * Test whether a character is in the RX buffer - */ -int serial_tstc (void) -{ - lh7a40x_uart_t* uart = LH7A40X_UART_PTR(UART_CONSOLE); - - return(!(uart->status & UART_RXFE)); -} - -void -serial_puts (const char *s) -{ - while (*s) { - serial_putc (*s++); - } -} diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile index 4a35703d22..ab5d5654d6 100644 --- a/drivers/serial/Makefile +++ b/drivers/serial/Makefile @@ -39,6 +39,7 @@ COBJS-$(CONFIG_IMX_SERIAL) += serial_imx.o COBJS-$(CONFIG_IXP_SERIAL) += serial_ixp.o COBJS-$(CONFIG_KS8695_SERIAL) += serial_ks8695.o COBJS-$(CONFIG_LPC2292_SERIAL) += serial_lpc2292.o +COBJS-$(CONFIG_LH7A40X_SERIAL) += serial_lh7a40x.o COBJS-$(CONFIG_MAX3100_SERIAL) += serial_max3100.o COBJS-$(CONFIG_MX31_UART) += serial_mx31.o COBJS-$(CONFIG_NETARM_SERIAL) += serial_netarm.o diff --git a/drivers/serial/serial_lh7a40x.c b/drivers/serial/serial_lh7a40x.c new file mode 100644 index 0000000000..4767489aef --- /dev/null +++ b/drivers/serial/serial_lh7a40x.c @@ -0,0 +1,184 @@ +/* + * (C) Copyright 2002 + * Gary Jennejohn, DENX Software Engineering, + * + * 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 + +DECLARE_GLOBAL_DATA_PTR; + +#if defined(CONFIG_CONSOLE_UART1) +# define UART_CONSOLE 1 +#elif defined(CONFIG_CONSOLE_UART2) +# define UART_CONSOLE 2 +#elif defined(CONFIG_CONSOLE_UART3) +# define UART_CONSOLE 3 +#else +# error "No console configured ... " +#endif + +void serial_setbrg (void) +{ + lh7a40x_uart_t* uart = LH7A40X_UART_PTR(UART_CONSOLE); + int i; + unsigned int reg = 0; + + /* + * userguide 15.1.2.4 + * + * BAUDDIV is (UART_REF_FREQ/(16 X BAUD))-1 + * + * UART_REF_FREQ = external system clock input / 2 (Hz) + * BAUD is desired baudrate (bits/s) + * + * NOTE: we add (divisor/2) to numerator to round for + * more precision + */ + reg = (((get_PLLCLK()/2) + ((16*gd->baudrate)/2)) / (16 * gd->baudrate)) - 1; + uart->brcon = reg; + + for (i = 0; i < 100; i++); +} + +/* + * Initialise the serial port with the given baudrate. The settings + * are always 8 data bits, no parity, 1 stop bit, no start bits. + * + */ +int serial_init (void) +{ + lh7a40x_uart_t* uart = LH7A40X_UART_PTR(UART_CONSOLE); + + /* UART must be enabled before writing to any config registers */ + uart->con |= (UART_EN); + +#ifdef CONFIG_CONSOLE_UART1 + /* infrared disabled */ + uart->con |= UART_SIRD; +#endif + /* loopback disabled */ + uart->con &= ~(UART_LBE); + + /* modem lines and tx/rx polarities */ + uart->con &= ~(UART_MXP | UART_TXP | UART_RXP); + + /* FIFO enable, N81 */ + uart->fcon = (UART_WLEN_8 | UART_FEN | UART_STP2_1); + + /* set baudrate */ + serial_setbrg (); + + /* enable rx interrupt */ + uart->inten |= UART_RI; + + return (0); +} + +/* + * Read a single byte from the serial port. Returns 1 on success, 0 + * otherwise. When the function is succesfull, the character read is + * written into its argument c. + */ +int serial_getc (void) +{ + lh7a40x_uart_t* uart = LH7A40X_UART_PTR(UART_CONSOLE); + + /* wait for character to arrive */ + while (uart->status & UART_RXFE); + + return(uart->data & 0xff); +} + +#ifdef CONFIG_HWFLOW +static int hwflow = 0; /* turned off by default */ +int hwflow_onoff(int on) +{ + switch(on) { + case 0: + default: + break; /* return current */ + case 1: + hwflow = 1; /* turn on */ + break; + case -1: + hwflow = 0; /* turn off */ + break; + } + return hwflow; +} +#endif + +#ifdef CONFIG_MODEM_SUPPORT +static int be_quiet = 0; +void disable_putc(void) +{ + be_quiet = 1; +} + +void enable_putc(void) +{ + be_quiet = 0; +} +#endif + + +/* + * Output a single byte to the serial port. + */ +void serial_putc (const char c) +{ + lh7a40x_uart_t* uart = LH7A40X_UART_PTR(UART_CONSOLE); + +#ifdef CONFIG_MODEM_SUPPORT + if (be_quiet) + return; +#endif + + /* wait for room in the tx FIFO */ + while (!(uart->status & UART_TXFE)); + +#ifdef CONFIG_HWFLOW + /* Wait for CTS up */ + while(hwflow && !(uart->status & UART_CTS)); +#endif + + uart->data = c; + + /* If \n, also do \r */ + if (c == '\n') + serial_putc ('\r'); +} + +/* + * Test whether a character is in the RX buffer + */ +int serial_tstc (void) +{ + lh7a40x_uart_t* uart = LH7A40X_UART_PTR(UART_CONSOLE); + + return(!(uart->status & UART_RXFE)); +} + +void +serial_puts (const char *s) +{ + while (*s) { + serial_putc (*s++); + } +} diff --git a/include/configs/lpd7a400.h b/include/configs/lpd7a400.h index b1bd74fc6f..bf4a57d249 100644 --- a/include/configs/lpd7a400.h +++ b/include/configs/lpd7a400.h @@ -43,6 +43,7 @@ /* * select serial console configuration */ +#define CONFIG_LH7A40X_SERIAL #define CONFIG_CONSOLE_UART2 /* UART2 LH7A40x for console */ /* allow to overwrite serial and ethaddr */ diff --git a/include/configs/lpd7a404.h b/include/configs/lpd7a404.h index b197674d47..102c0af3b9 100644 --- a/include/configs/lpd7a404.h +++ b/include/configs/lpd7a404.h @@ -43,6 +43,7 @@ /* * select serial console configuration */ +#define CONFIG_LH7A40X_SERIAL #define CONFIG_CONSOLE_UART2 /* UART2 LH7A40x for console */ /* allow to overwrite serial and ethaddr */