Zoom2 serial is in general supplied by one of the 4 UARTS on the debug board. The default serial is from the USB connector on left side of the debug board. The USB connector will produce 2 of the 4 UARTS. On your host pick the first enumeration.
The serial port set up is the same with Zoom1. Baud rate 115200, 8 bit data, no parity, 1 stop bit, no flow.
The kernel bootargs are console=ttyS3,115200n8
Signed-off-by: Tom Rix Tom.Rix@windriver.com --- board/omap3/zoom2/Makefile | 3 +- board/omap3/zoom2/zoom2.c | 30 +++++++++ board/omap3/zoom2/zoom2_serial.c | 130 ++++++++++++++++++++++++++++++++++++++ board/omap3/zoom2/zoom2_serial.h | 75 ++++++++++++++++++++++ common/serial.c | 2 + drivers/serial/ns16550.c | 4 +- include/configs/omap3_zoom2.h | 28 ++++---- include/serial.h | 7 ++ 8 files changed, 262 insertions(+), 17 deletions(-) create mode 100644 board/omap3/zoom2/zoom2_serial.c create mode 100644 board/omap3/zoom2/zoom2_serial.h
diff --git a/board/omap3/zoom2/Makefile b/board/omap3/zoom2/Makefile index b8fa5a7..d27990c 100644 --- a/board/omap3/zoom2/Makefile +++ b/board/omap3/zoom2/Makefile @@ -26,7 +26,8 @@ include $(TOPDIR)/config.mk LIB = $(obj)lib$(BOARD).a
COBJS := zoom2.o \ - debug_board.o + debug_board.o \ + zoom2_serial.o
SRCS := $(COBJS:.o=.c) OBJS := $(addprefix $(obj),$(COBJS)) diff --git a/board/omap3/zoom2/zoom2.c b/board/omap3/zoom2/zoom2.c index 0700c56..a2a5b5a 100644 --- a/board/omap3/zoom2/zoom2.c +++ b/board/omap3/zoom2/zoom2.c @@ -30,10 +30,24 @@ */ #include <common.h> #include <asm/io.h> +#include <asm/arch/mem.h> #include <asm/arch/mux.h> #include <asm/arch/sys_proto.h> #include <asm/mach-types.h> #include "zoom2.h" +#include "zoom2_serial.h" + +extern void enable_gpmc_config(u32 *gpmc_config, gpmc_csx_t *gpmc_cs_base, + u32 base, u32 size); + +static u32 gpmc_serial_TL16CP754C[GPMC_MAX_REG] = { + 0x00011000, + 0x001F1F01, + 0x00080803, + 0x1D091D09, + 0x041D1F1F, + 0x1D0904C4, 0 +};
/* * Routine: board_init @@ -42,13 +56,29 @@ int board_init (void) { DECLARE_GLOBAL_DATA_PTR; + gpmc_csx_t *serial_cs_base; + u32 *gpmc_config;
gpmc_init (); /* in SRAM or SDRAM, finish GPMC */ + + /* Configure console support on zoom2 */ + gpmc_config = gpmc_serial_TL16CP754C; + serial_cs_base = (gpmc_csx_t *) (GPMC_CONFIG_CS0_BASE + + (3 * GPMC_CONFIG_WIDTH)); + enable_gpmc_config(gpmc_config, + serial_cs_base, + SERIAL_TL16CP754C_BASE, + GPMC_SIZE_16M); + /* board id for Linux */ gd->bd->bi_arch_number = MACH_TYPE_OMAP_ZOOM2; /* boot param addr */ gd->bd->bi_boot_params = (OMAP34XX_SDRC_CS0 + 0x100);
+#if defined(CONFIG_STATUS_LED) && defined(STATUS_LED_BOOT) + status_led_set (STATUS_LED_BOOT, STATUS_LED_ON); +#endif + return 0; }
diff --git a/board/omap3/zoom2/zoom2_serial.c b/board/omap3/zoom2/zoom2_serial.c new file mode 100644 index 0000000..5e24fe0 --- /dev/null +++ b/board/omap3/zoom2/zoom2_serial.c @@ -0,0 +1,130 @@ +/* + * Copyright (c) 2009 Wind River Systems, Inc. + * Tom Rix Tom.Rix@windriver.com + * + * 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 + * + * This file was adapted from cpu/mpc5xxx/serial.c + * + */ + +#include <common.h> +#include <serial.h> +#include <ns16550.h> +#include <asm/arch/cpu.h> +#include "zoom2_serial.h" + +int quad_init_dev (unsigned long base) +{ + /* + * The Quad UART is on the debug board. + * Check if the debug board is attached before using the UART + */ + if (zoom2_debug_board_connected ()) { + NS16550_t com_port = (NS16550_t) base; + int baud_divisor = CONFIG_SYS_NS16550_CLK / 16 / + CONFIG_BAUDRATE; + + /* + * Zoom2 has a board specific initialization of its UART. + * This generic initialization has been copied from + * drivers/serial/ns16550.c. The macros have been expanded. + * + * Do the following instead of + * + * NS16550_init (port, clock_divisor); + */ + com_port->ier = 0x00; + + /* + * On Zoom2 board Set pre-scalar to 1 + * CLKSEL is GND => MCR[7] is 1 => preslr is 4 + * So change the prescl to 1 + */ + com_port->lcr = 0xBF; + com_port->fcr |= 0x10; + com_port->mcr &= 0x7F; + + /* This is generic ns16550.c setup */ + com_port->lcr = UART_LCR_BKSE | UART_LCR_8N1; + com_port->dll = 0; + com_port->dlm = 0; + com_port->lcr = UART_LCR_8N1; + com_port->mcr = UART_MCR_DTR | UART_MCR_RTS; + com_port->fcr = UART_FCR_FIFO_EN | UART_FCR_RXSR | + UART_FCR_TXSR; + com_port->lcr = UART_LCR_BKSE | UART_LCR_8N1; + com_port->dll = baud_divisor & 0xff; + com_port->dlm = (baud_divisor >> 8) & 0xff; + com_port->lcr = UART_LCR_8N1; + } + /* + * We have to lie here, otherwise the board init code will hang + * on the check + */ + return 0; +} + +void quad_putc_dev (unsigned long base, const char c) +{ + if (zoom2_debug_board_connected ()) { + + if (c == '\n') + quad_putc_dev (base, '\r'); + + NS16550_putc ((NS16550_t) base, c); + } +} + +void quad_puts_dev (unsigned long base, const char *s) +{ + if (zoom2_debug_board_connected ()) { + while ((s != NULL) && (*s != '\0')) + quad_putc_dev (base, *s++); + } +} + +int quad_getc_dev (unsigned long base) +{ + if (zoom2_debug_board_connected ()) + return NS16550_getc ((NS16550_t) base); + else + return 0; +} + +int quad_tstc_dev (unsigned long base) +{ + if (zoom2_debug_board_connected ()) + return NS16550_tstc ((NS16550_t) base); + else + return 0; +} + +void quad_setbrg_dev (unsigned long base) +{ + if (zoom2_debug_board_connected ()) { + + int clock_divisor = CONFIG_SYS_NS16550_CLK / 16 / + CONFIG_BAUDRATE; + + NS16550_reinit ((NS16550_t) base, clock_divisor); + } +} + +QUAD_INIT (0) +QUAD_INIT (1) +QUAD_INIT (2) +QUAD_INIT (3) diff --git a/board/omap3/zoom2/zoom2_serial.h b/board/omap3/zoom2/zoom2_serial.h new file mode 100644 index 0000000..ccd42c9 --- /dev/null +++ b/board/omap3/zoom2/zoom2_serial.h @@ -0,0 +1,75 @@ +/* + * Copyright (c) 2009 Wind River Systems, Inc. + * Tom Rix Tom.Rix@windriver.com + * + * 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 + * + */ + +#ifndef ZOOM2_SERIAL_H +#define ZOOM2_SERIAL_H + +extern int zoom2_debug_board_connected (void); + +#define SERIAL_TL16CP754C_BASE 0x10000000 /* Zoom2 Serial chip address */ + +#define QUAD_BASE_0 SERIAL_TL16CP754C_BASE +#define QUAD_BASE_1 (SERIAL_TL16CP754C_BASE + 0x100) +#define QUAD_BASE_2 (SERIAL_TL16CP754C_BASE + 0x200) +#define QUAD_BASE_3 (SERIAL_TL16CP754C_BASE + 0x300) + +#define S(a) #a +#define N(a) S(quad##a) +#define U(a) S(UART##a) + +#define QUAD_INIT(n) \ +int quad_init_##n(void) \ +{ \ + return quad_init_dev(QUAD_BASE_##n); \ +} \ +void quad_setbrg_##n(void) \ +{ \ + quad_setbrg_dev(QUAD_BASE_##n); \ +} \ +void quad_putc_##n(const char c) \ +{ \ + quad_putc_dev(QUAD_BASE_##n, c); \ +} \ +void quad_puts_##n(const char *s) \ +{ \ + quad_puts_dev(QUAD_BASE_##n, s); \ +} \ +int quad_getc_##n(void) \ +{ \ + return quad_getc_dev(QUAD_BASE_##n); \ +} \ +int quad_tstc_##n(void) \ +{ \ + return quad_tstc_dev(QUAD_BASE_##n); \ +} \ +struct serial_device zoom2_serial_device##n = \ +{ \ + N(n), \ + U(n), \ + quad_init_##n, \ + quad_setbrg_##n, \ + quad_getc_##n, \ + quad_tstc_##n, \ + quad_putc_##n, \ + quad_puts_##n, \ +}; + +#endif /* ZOOM2_SERIAL_H */ diff --git a/common/serial.c b/common/serial.c index 09385d0..3e9135b 100644 --- a/common/serial.c +++ b/common/serial.c @@ -68,6 +68,8 @@ struct serial_device *__default_serial_console (void) #else #error "CONFIG_SERIAL? missing." #endif +#elif defined(CONFIG_OMAP3_ZOOM2) + return DEFAULT_ZOOM2_SERIAL_DEVICE; #else #error No default console #endif diff --git a/drivers/serial/ns16550.c b/drivers/serial/ns16550.c index 657c9da..2fcc8c3 100644 --- a/drivers/serial/ns16550.c +++ b/drivers/serial/ns16550.c @@ -17,7 +17,7 @@ void NS16550_init (NS16550_t com_port, int baud_divisor) { com_port->ier = 0x00; -#ifdef CONFIG_OMAP +#if defined(CONFIG_OMAP) && !defined(CONFIG_OMAP3_ZOOM2) com_port->mdr1 = 0x7; /* mode select reset TL16C750*/ #endif com_port->lcr = UART_LCR_BKSE | UART_LCRVAL; @@ -30,7 +30,7 @@ void NS16550_init (NS16550_t com_port, int baud_divisor) com_port->dll = baud_divisor & 0xff; com_port->dlm = (baud_divisor >> 8) & 0xff; com_port->lcr = UART_LCRVAL; -#if defined(CONFIG_OMAP) +#if defined(CONFIG_OMAP) && !defined(CONFIG_OMAP3_ZOOM2) #if defined(CONFIG_APTIX) com_port->mdr1 = 3; /* /13 mode so Aptix 6MHz can hit 115200 */ #else diff --git a/include/configs/omap3_zoom2.h b/include/configs/omap3_zoom2.h index 2d8ca92..7c1bf65 100644 --- a/include/configs/omap3_zoom2.h +++ b/include/configs/omap3_zoom2.h @@ -69,26 +69,26 @@
/* * NS16550 Configuration + * Zoom2 uses the TL16CP754C on the debug board */ -#define V_NS16550_CLK 48000000 /* 48MHz (APLL96/2) */ - -#define CONFIG_SYS_NS16550 -#define CONFIG_SYS_NS16550_SERIAL -#define CONFIG_SYS_NS16550_REG_SIZE (-4) -#define CONFIG_SYS_NS16550_CLK V_NS16550_CLK - +#define CONFIG_SERIAL_MULTI 1 /* - * select serial console configuration + * 0 - 1 : first USB with respect to the left edge of the debug board + * 2 - 3 : second USB with respect to the left edge of the debug board */ -#define CONFIG_CONS_INDEX 3 -#define CONFIG_SYS_NS16550_COM3 OMAP34XX_UART3 -#define CONFIG_SERIAL3 3 /* UART3 */ +#define DEFAULT_ZOOM2_SERIAL_DEVICE (&zoom2_serial_device0) + +#define V_NS16550_CLK (1843200) /* 1.8432 Mhz */ + +#define CONFIG_SYS_NS16550 +#define CONFIG_SYS_NS16550_REG_SIZE (-2) +#define CONFIG_SYS_NS16550_CLK V_NS16550_CLK +#define CONFIG_BAUDRATE 115200 +#define CONFIG_SYS_BAUDRATE_TABLE {115200}
/* allow to overwrite serial and ethaddr */ #define CONFIG_ENV_OVERWRITE -#define CONFIG_BAUDRATE 115200 -#define CONFIG_SYS_BAUDRATE_TABLE {4800, 9600, 19200, 38400, 57600,\ - 115200} + #define CONFIG_MMC 1 #define CONFIG_OMAP3_MMC 1 #define CONFIG_DOS_PARTITION 1 diff --git a/include/serial.h b/include/serial.h index e3d8b36..aca5221 100644 --- a/include/serial.h +++ b/include/serial.h @@ -42,6 +42,13 @@ extern struct serial_device s3c24xx_serial1_device; extern struct serial_device s3c24xx_serial2_device; #endif
+#if defined(CONFIG_OMAP3_ZOOM2) +extern struct serial_device zoom2_serial_device0; +extern struct serial_device zoom2_serial_device1; +extern struct serial_device zoom2_serial_device2; +extern struct serial_device zoom2_serial_device3; +#endif + extern struct serial_device serial_ffuart_device; extern struct serial_device serial_btuart_device; extern struct serial_device serial_stuart_device;