From 7a9348728ebda63cdbaacffd83099aa71d9d4c54 Mon Sep 17 00:00:00 2001 From: Peter Pearse Date: Tue, 23 Oct 2007 10:22:16 +0100 Subject: Move PL01* serial drivers to drivers/serial and adjust Makefiles. --- drivers/serial/Makefile | 2 +- drivers/serial/serial_pl010.c | 171 ++++++++++++++++++++++++++++++++++++++++++ drivers/serial/serial_pl011.c | 161 +++++++++++++++++++++++++++++++++++++++ drivers/serial/serial_pl011.h | 137 +++++++++++++++++++++++++++++++++ 4 files changed, 470 insertions(+), 1 deletion(-) create mode 100644 drivers/serial/serial_pl010.c create mode 100644 drivers/serial/serial_pl011.c create mode 100644 drivers/serial/serial_pl011.h (limited to 'drivers/serial') diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile index 93c68dd..40f3d67 100644 --- a/drivers/serial/Makefile +++ b/drivers/serial/Makefile @@ -25,7 +25,7 @@ include $(TOPDIR)/config.mk LIB := $(obj)libserial.a -COBJS := mcfuart.o +COBJS := mcfuart.o serial_pl010.o serial_pl011.o SRCS := $(COBJS:.o=.c) OBJS := $(addprefix $(obj),$(COBJS)) diff --git a/drivers/serial/serial_pl010.c b/drivers/serial/serial_pl010.c new file mode 100644 index 0000000..417b6ae --- /dev/null +++ b/drivers/serial/serial_pl010.c @@ -0,0 +1,171 @@ +/* + * (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 PL011 UARTs on the IntegratorCP */ +/* Should be fairly simple to make it work with the PL010 as well */ + +#include + +#ifdef CFG_PL010_SERIAL + +#include "serial_pl011.h" + +#define IO_WRITE(addr, val) (*(volatile unsigned int *)(addr) = (val)) +#define IO_READ(addr) (*(volatile unsigned int *)(addr)) + +/* Integrator AP has two UARTs, we use the first one, at 38400-8-N-1 */ +#define CONSOLE_PORT CONFIG_CONS_INDEX +#define baudRate CONFIG_BAUDRATE +static volatile unsigned char *const port[] = CONFIG_PL01x_PORTS; +#define NUM_PORTS (sizeof(port)/sizeof(port[0])) + + +static void pl010_putc (int portnum, char c); +static int pl010_getc (int portnum); +static int pl010_tstc (int portnum); + + +int serial_init (void) +{ + unsigned int divisor; + + /* + ** First, disable everything. + */ + IO_WRITE (port[CONSOLE_PORT] + UART_PL010_CR, 0x0); + + /* + ** Set baud rate + ** + */ + 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; + } + + IO_WRITE (port[CONSOLE_PORT] + UART_PL010_LCRM, + ((divisor & 0xf00) >> 8)); + IO_WRITE (port[CONSOLE_PORT] + UART_PL010_LCRL, (divisor & 0xff)); + + /* + ** Set the UART to be 8 bits, 1 stop bit, no parity, fifo enabled. + */ + IO_WRITE (port[CONSOLE_PORT] + UART_PL010_LCRH, + (UART_PL010_LCRH_WLEN_8 | UART_PL010_LCRH_FEN)); + + /* + ** Finally, enable the UART + */ + IO_WRITE (port[CONSOLE_PORT] + UART_PL010_CR, (UART_PL010_CR_UARTEN)); + + return (0); +} + +void serial_putc (const char c) +{ + if (c == '\n') + pl010_putc (CONSOLE_PORT, '\r'); + + pl010_putc (CONSOLE_PORT, c); +} + +void serial_puts (const char *s) +{ + while (*s) { + serial_putc (*s++); + } +} + +int serial_getc (void) +{ + return pl010_getc (CONSOLE_PORT); +} + +int serial_tstc (void) +{ + return pl010_tstc (CONSOLE_PORT); +} + +void serial_setbrg (void) +{ +} + +static void pl010_putc (int portnum, char c) +{ + /* Wait until there is space in the FIFO */ + while (IO_READ (port[portnum] + UART_PL01x_FR) & UART_PL01x_FR_TXFF); + + /* Send the character */ + IO_WRITE (port[portnum] + UART_PL01x_DR, c); +} + +static int pl010_getc (int portnum) +{ + unsigned int data; + + /* Wait until there is data in the FIFO */ + while (IO_READ (port[portnum] + UART_PL01x_FR) & UART_PL01x_FR_RXFE); + + data = IO_READ (port[portnum] + UART_PL01x_DR); + + /* Check for an error flag */ + if (data & 0xFFFFFF00) { + /* Clear the error */ + IO_WRITE (port[portnum] + UART_PL01x_ECR, 0xFFFFFFFF); + return -1; + } + + return (int) data; +} + +static int pl010_tstc (int portnum) +{ + return !(IO_READ (port[portnum] + UART_PL01x_FR) & + UART_PL01x_FR_RXFE); +} + +#endif diff --git a/drivers/serial/serial_pl011.c b/drivers/serial/serial_pl011.c new file mode 100644 index 0000000..4d35fe5 --- /dev/null +++ b/drivers/serial/serial_pl011.c @@ -0,0 +1,161 @@ +/* + * (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 PL011 UARTs on the IntegratorCP */ +/* Should be fairly simple to make it work with the PL010 as well */ + +#include + +#ifdef CFG_PL011_SERIAL + +#include "serial_pl011.h" + +#define IO_WRITE(addr, val) (*(volatile unsigned int *)(addr) = (val)) +#define IO_READ(addr) (*(volatile unsigned int *)(addr)) + +/* + * IntegratorCP has two UARTs, use the first one, at 38400-8-N-1 + * Versatile PB has four UARTs. + */ + +#define CONSOLE_PORT CONFIG_CONS_INDEX +#define baudRate CONFIG_BAUDRATE +static volatile unsigned char *const port[] = CONFIG_PL01x_PORTS; +#define NUM_PORTS (sizeof(port)/sizeof(port[0])) + +static void pl011_putc (int portnum, char c); +static int pl011_getc (int portnum); +static int pl011_tstc (int portnum); + + +int serial_init (void) +{ + unsigned int temp; + unsigned int divider; + unsigned int remainder; + unsigned int fraction; + + /* + ** First, disable everything. + */ + IO_WRITE (port[CONSOLE_PORT] + UART_PL011_CR, 0x0); + + /* + ** Set baud rate + ** + ** IBRD = UART_CLK / (16 * BAUD_RATE) + ** FBRD = ROUND((64 * MOD(UART_CLK,(16 * BAUD_RATE))) / (16 * BAUD_RATE)) + */ + temp = 16 * baudRate; + divider = CONFIG_PL011_CLOCK / temp; + remainder = CONFIG_PL011_CLOCK % temp; + temp = (8 * remainder) / baudRate; + fraction = (temp >> 1) + (temp & 1); + + IO_WRITE (port[CONSOLE_PORT] + UART_PL011_IBRD, divider); + IO_WRITE (port[CONSOLE_PORT] + UART_PL011_FBRD, fraction); + + /* + ** Set the UART to be 8 bits, 1 stop bit, no parity, fifo enabled. + */ + IO_WRITE (port[CONSOLE_PORT] + UART_PL011_LCRH, + (UART_PL011_LCRH_WLEN_8 | UART_PL011_LCRH_FEN)); + + /* + ** Finally, enable the UART + */ + IO_WRITE (port[CONSOLE_PORT] + UART_PL011_CR, + (UART_PL011_CR_UARTEN | UART_PL011_CR_TXE | + UART_PL011_CR_RXE)); + + return 0; +} + +void serial_putc (const char c) +{ + if (c == '\n') + pl011_putc (CONSOLE_PORT, '\r'); + + pl011_putc (CONSOLE_PORT, c); +} + +void serial_puts (const char *s) +{ + while (*s) { + serial_putc (*s++); + } +} + +int serial_getc (void) +{ + return pl011_getc (CONSOLE_PORT); +} + +int serial_tstc (void) +{ + return pl011_tstc (CONSOLE_PORT); +} + +void serial_setbrg (void) +{ +} + +static void pl011_putc (int portnum, char c) +{ + /* Wait until there is space in the FIFO */ + while (IO_READ (port[portnum] + UART_PL01x_FR) & UART_PL01x_FR_TXFF); + + /* Send the character */ + IO_WRITE (port[portnum] + UART_PL01x_DR, c); +} + +static int pl011_getc (int portnum) +{ + unsigned int data; + + /* Wait until there is data in the FIFO */ + while (IO_READ (port[portnum] + UART_PL01x_FR) & UART_PL01x_FR_RXFE); + + data = IO_READ (port[portnum] + UART_PL01x_DR); + + /* Check for an error flag */ + if (data & 0xFFFFFF00) { + /* Clear the error */ + IO_WRITE (port[portnum] + UART_PL01x_ECR, 0xFFFFFFFF); + return -1; + } + + return (int) data; +} + +static int pl011_tstc (int portnum) +{ + return !(IO_READ (port[portnum] + UART_PL01x_FR) & + UART_PL01x_FR_RXFE); +} + +#endif diff --git a/drivers/serial/serial_pl011.h b/drivers/serial/serial_pl011.h new file mode 100644 index 0000000..5f20fdd --- /dev/null +++ b/drivers/serial/serial_pl011.h @@ -0,0 +1,137 @@ +/* + * (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 + */ + +/* + * ARM PrimeCell UART's (PL010 & PL011) + * ------------------------------------ + * + * Definitions common to both PL010 & PL011 + * + */ +#define UART_PL01x_DR 0x00 /* Data read or written from the interface. */ +#define UART_PL01x_RSR 0x04 /* Receive status register (Read). */ +#define UART_PL01x_ECR 0x04 /* Error clear register (Write). */ +#define UART_PL01x_FR 0x18 /* Flag register (Read only). */ + +#define UART_PL01x_RSR_OE 0x08 +#define UART_PL01x_RSR_BE 0x04 +#define UART_PL01x_RSR_PE 0x02 +#define UART_PL01x_RSR_FE 0x01 + +#define UART_PL01x_FR_TXFE 0x80 +#define UART_PL01x_FR_RXFF 0x40 +#define UART_PL01x_FR_TXFF 0x20 +#define UART_PL01x_FR_RXFE 0x10 +#define UART_PL01x_FR_BUSY 0x08 +#define UART_PL01x_FR_TMSK (UART_PL01x_FR_TXFF + UART_PL01x_FR_BUSY) + +/* + * PL010 definitions + * + */ +#define UART_PL010_LCRH 0x08 /* Line control register, high byte. */ +#define UART_PL010_LCRM 0x0C /* Line control register, middle byte. */ +#define UART_PL010_LCRL 0x10 /* Line control register, low byte. */ +#define UART_PL010_CR 0x14 /* Control register. */ +#define UART_PL010_IIR 0x1C /* Interrupt indentification register (Read). */ +#define UART_PL010_ICR 0x1C /* Interrupt clear register (Write). */ +#define UART_PL010_ILPR 0x20 /* IrDA low power counter register. */ + +#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 +/* + * PL011 definitions + * + */ +#define UART_PL011_IBRD 0x24 +#define UART_PL011_FBRD 0x28 +#define UART_PL011_LCRH 0x2C +#define UART_PL011_CR 0x30 +#define UART_PL011_IMSC 0x38 +#define UART_PL011_PERIPH_ID0 0xFE0 + +#define UART_PL011_LCRH_SPS (1 << 7) +#define UART_PL011_LCRH_WLEN_8 (3 << 5) +#define UART_PL011_LCRH_WLEN_7 (2 << 5) +#define UART_PL011_LCRH_WLEN_6 (1 << 5) +#define UART_PL011_LCRH_WLEN_5 (0 << 5) +#define UART_PL011_LCRH_FEN (1 << 4) +#define UART_PL011_LCRH_STP2 (1 << 3) +#define UART_PL011_LCRH_EPS (1 << 2) +#define UART_PL011_LCRH_PEN (1 << 1) +#define UART_PL011_LCRH_BRK (1 << 0) + +#define UART_PL011_CR_CTSEN (1 << 15) +#define UART_PL011_CR_RTSEN (1 << 14) +#define UART_PL011_CR_OUT2 (1 << 13) +#define UART_PL011_CR_OUT1 (1 << 12) +#define UART_PL011_CR_RTS (1 << 11) +#define UART_PL011_CR_DTR (1 << 10) +#define UART_PL011_CR_RXE (1 << 9) +#define UART_PL011_CR_TXE (1 << 8) +#define UART_PL011_CR_LPE (1 << 7) +#define UART_PL011_CR_IIRLP (1 << 2) +#define UART_PL011_CR_SIREN (1 << 1) +#define UART_PL011_CR_UARTEN (1 << 0) + +#define UART_PL011_IMSC_OEIM (1 << 10) +#define UART_PL011_IMSC_BEIM (1 << 9) +#define UART_PL011_IMSC_PEIM (1 << 8) +#define UART_PL011_IMSC_FEIM (1 << 7) +#define UART_PL011_IMSC_RTIM (1 << 6) +#define UART_PL011_IMSC_TXIM (1 << 5) +#define UART_PL011_IMSC_RXIM (1 << 4) +#define UART_PL011_IMSC_DSRMIM (1 << 3) +#define UART_PL011_IMSC_DCDMIM (1 << 2) +#define UART_PL011_IMSC_CTSMIM (1 << 1) +#define UART_PL011_IMSC_RIMIM (1 << 0) -- cgit v1.1