[U-Boot] [PATCH 04/10] ZOOM2 Add serial support.
Tom Rix
Tom.Rix at windriver.com
Tue Apr 14 16:40:57 CEST 2009
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 at 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 at 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 at 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;
--
1.6.0.5
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