A10 serial driver (still needs some work). From Alan Carvalho de Assis

1 files changed, 289 insertions, 0 deletions

diff --git a/nuttx/arch/arm/src/a1x/a1x_lowputc.c b/nuttx/arch/arm/src/a1x/a1x_lowputc.c
new file mode 100644
index 000000000..1c10464ba
--- /dev/null
+++ b/nuttx/arch/arm/src/a1x/a1x_lowputc.c
@@ -0,0 +1,289 @@
+/**************************************************************************
+ * arch/arm/src/a1x/a1x_lowputc.c
+ *
+ *   Copyright (C) 2013 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ **************************************************************************/
+
+/**************************************************************************
+ * Included Files
+ **************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdint.h>
+
+#include <arch/irq.h>
+#include <arch/board/board.h>
+
+#include "up_internal.h"
+#include "up_arch.h"
+
+#include "a1x_config.h"
+#include "chip/a1x_uart.h"
+#include "a1x_pio.h"
+
+/**************************************************************************
+ * Private Definitions
+ **************************************************************************/
+
+/* Select UART parameters for the selected console */
+
+#if defined(CONFIG_UART0_SERIAL_CONSOLE)
+#  define CONSOLE_BASE     A1X_UART0_VADDR
+#  define CONSOLE_BAUD     CONFIG_UART0_BAUD
+#  define CONSOLE_BITS     CONFIG_UART0_BITS
+#  define CONSOLE_PARITY   CONFIG_UART0_PARITY
+#  define CONSOLE_2STOP    CONFIG_UART0_2STOP
+#elif defined(CONFIG_UART1_SERIAL_CONSOLE)
+#  define CONSOLE_BASE     A1X_UART1_VADDR
+#  define CONSOLE_BAUD     CONFIG_UART1_BAUD
+#  define CONSOLE_BITS     CONFIG_UART1_BITS
+#  define CONSOLE_PARITY   CONFIG_UART1_PARITY
+#  define CONSOLE_2STOP    CONFIG_UART1_2STOP
+#elif defined(CONFIG_UART2_SERIAL_CONSOLE)
+#  define CONSOLE_BASE     A1X_UART2_VADDR
+#  define CONSOLE_BAUD     CONFIG_UART2_BAUD
+#  define CONSOLE_BITS     CONFIG_UART2_BITS
+#  define CONSOLE_PARITY   CONFIG_UART2_PARITY
+#  define CONSOLE_2STOP    CONFIG_UART2_2STOP
+#elif defined(CONFIG_UART3_SERIAL_CONSOLE)
+#  define CONSOLE_BASE     A1X_UART3_VADDR
+#  define CONSOLE_BAUD     CONFIG_UART3_BAUD
+#  define CONSOLE_BITS     CONFIG_UART3_BITS
+#  define CONSOLE_PARITY   CONFIG_UART3_PARITY
+#  define CONSOLE_2STOP    CONFIG_UART3_2STOP
+#elif defined(CONFIG_UART4_SERIAL_CONSOLE)
+#  define CONSOLE_BASE     A1X_UART4_VADDR
+#  define CONSOLE_BAUD     CONFIG_UART4_BAUD
+#  define CONSOLE_BITS     CONFIG_UART4_BITS
+#  define CONSOLE_PARITY   CONFIG_UART4_PARITY
+#  define CONSOLE_2STOP    CONFIG_UART4_2STOP
+#elif defined(CONFIG_UART5_SERIAL_CONSOLE)
+#  define CONSOLE_BASE     A1X_UART5_VADDR
+#  define CONSOLE_BAUD     CONFIG_UART5_BAUD
+#  define CONSOLE_BITS     CONFIG_UART5_BITS
+#  define CONSOLE_PARITY   CONFIG_UART5_PARITY
+#  define CONSOLE_2STOP    CONFIG_UART5_2STOP
+#elif defined(CONFIG_UART6_SERIAL_CONSOLE)
+#  define CONSOLE_BASE     A1X_UART6_VADDR
+#  define CONSOLE_BAUD     CONFIG_UART6_BAUD
+#  define CONSOLE_BITS     CONFIG_UART6_BITS
+#  define CONSOLE_PARITY   CONFIG_UART6_PARITY
+#  define CONSOLE_2STOP    CONFIG_UART6_2STOP
+#elif defined(CONFIG_UART7_SERIAL_CONSOLE)
+#  define CONSOLE_BASE     A1X_UART7_VADDR
+#  define CONSOLE_BAUD     CONFIG_UART7_BAUD
+#  define CONSOLE_BITS     CONFIG_UART7_BITS
+#  define CONSOLE_PARITY   CONFIG_UART7_PARITY
+#  define CONSOLE_2STOP    CONFIG_UART7_2STOP
+#elif defined(HAVE_SERIAL_CONSOLE)
+#  error "No CONFIG_UARTn_SERIAL_CONSOLE Setting"
+#endif
+
+/* Get word length setting for the console */
+
+#if CONSOLE_BITS == 5
+#  define CONSOLE_LCR_DLS UART_LCR_DLS_5BITS
+#elif CONSOLE_BITS == 6
+#  define CONSOLE_LCR_DLS UART_LCR_DLS_6BITS
+#elif CONSOLE_BITS == 7
+#  define CONSOLE_LCR_DLS UART_LCR_DLS_7BITS
+#elif CONSOLE_BITS == 8
+#  define CONSOLE_LCR_DLS UART_LCR_DLS_8BITS
+#elif defined(HAVE_SERIAL_CONSOLE)
+#  error "Invalid CONFIG_UARTn_BITS setting for console "
+#endif
+
+/* Get parity setting for the console */
+
+#if CONSOLE_PARITY == 0
+#  define CONSOLE_LCR_PAR 0
+#elif CONSOLE_PARITY == 1
+#  define CONSOLE_LCR_PAR UART_LCR_PEN
+#elif CONSOLE_PARITY == 2
+#  define CONSOLE_LCR_PAR (UART_LCR_PEN | UART_LCR_EPS)
+#elif CONSOLE_PARITY == 3
+#elif defined(HAVE_SERIAL_CONSOLE)
+#    error "Invalid CONFIG_UARTn_PARITY setting for CONSOLE"
+#endif
+
+/* Get stop-bit setting for the console and UART0-3 */
+
+#if CONSOLE_2STOP != 0
+#  define CONSOLE_LCR_STOP UART_LCR_STOP
+#else
+#  define CONSOLE_LCR_STOP 0
+#endif
+
+/* LCR and FCR values for the console */
+
+#define CONSOLE_LCR_VALUE (CONSOLE_LCR_DLS | CONSOLE_LCR_PAR | CONSOLE_LCR_STOP)
+#define CONSOLE_FCR_VALUE (UART_FCR_RT_HALF | UART_FCR_XFIFOR |\
+                           UART_FCR_RFIFOR | UART_FCR_FIFOE)
+
+/* SCLK is the UART input clock */
+
+#define A1X_SCLK 0
+#warning What is the correct value of SCLK
+
+/* The output baud rate is equal to the serial clock (SCLK) frequency divided
+ * by sixteen times the value of the baud rate divisor, as follows:
+ *
+ * baud rate = Fsclk / (16 * divisor).
+ */
+
+#define CONSOLE_DL (A1X_SCLK / (CONSOLE_BAUD << 4))
+
+/**************************************************************************
+ * Private Types
+ **************************************************************************/
+
+/**************************************************************************
+ * Private Function Prototypes
+ **************************************************************************/
+
+/**************************************************************************
+ * Global Variables
+ **************************************************************************/
+
+/**************************************************************************
+ * Private Variables
+ **************************************************************************/
+
+/**************************************************************************
+ * Private Functions
+ **************************************************************************/
+
+/**************************************************************************
+ * Public Functions
+ **************************************************************************/
+
+/**************************************************************************
+ * Name: up_lowputc
+ *
+ * Description:
+ *   Output one byte on the serial console
+ *
+ **************************************************************************/
+
+void up_lowputc(char ch)
+{
+#if defined HAVE_UART_DEVICE && defined HAVE_SERIAL_CONSOLE
+  /* Wait for the transmitter to be available */
+
+  while ((getreg32(CONSOLE_BASE+A1X_UART_LSR_OFFSET) & UART_LSR_THRE) == 0);
+
+  /* Send the character */
+
+  putreg32((uint32_t)ch, CONSOLE_BASE+A1X_UART_THR_OFFSET);
+#endif
+}
+
+/**************************************************************************
+ * Name: a1x_lowsetup
+ *
+ * Description:
+ *   This performs basic initialization of the UART used for the serial
+ *   console.  Its purpose is to get the console output available as soon
+ *   as possible.
+ *
+ **************************************************************************/
+
+void a1x_lowsetup(void)
+{
+#ifdef HAVE_UART_DEVICE
+  /* Enable power and clocking to the UART peripheral */
+#warning Missing logic
+
+  /* Configure UART pins for the selected CONSOLE.  If there are multiple
+   * pin options for a given UART, the the applicable option must be
+   * disambiguated in the board.h header file.
+   */
+
+#if defined(CONFIG_UART0_SERIAL_CONSOLE)
+  a1x_pio_config(PIO_UART0_TX);
+  a1x_pio_config(PIO_UART0_RX);
+#elif defined(CONFIG_UART1_SERIAL_CONSOLE)
+  a1x_pio_config(PIO_UART1_TX);
+  a1x_pio_config(PIO_UART1_RX);
+#elif defined(CONFIG_UART2_SERIAL_CONSOLE)
+  a1x_pio_config(PIO_UART2_TX);
+  a1x_pio_config(PIO_UART2_RX);
+#elif defined(CONFIG_UART3_SERIAL_CONSOLE)
+  a1x_pio_config(PIO_UART3_TX);
+  a1x_pio_config(PIO_UART3_RX);
+#elif defined(CONFIG_UART4_SERIAL_CONSOLE)
+  a1x_pio_config(PIO_UART4_TX);
+  a1x_pio_config(PIO_UART4_RX);
+#elif defined(CONFIG_UART5_SERIAL_CONSOLE)
+  a1x_pio_config(PIO_UART5_TX);
+  a1x_pio_config(PIO_UART5_RX);
+#elif defined(CONFIG_UART6_SERIAL_CONSOLE)
+  a1x_pio_config(PIO_UART6_TX);
+  a1x_pio_config(PIO_UART6_RX);
+#elif defined(CONFIG_UART7_SERIAL_CONSOLE)
+  a1x_pio_config(PIO_UART7_TX);
+  a1x_pio_config(PIO_UART7_RX);
+#endif
+
+  /* Configure the console (only) */
+
+#if defined(HAVE_SERIAL_CONSOLE) && !defined(CONFIG_SUPPRESS_UART_CONFIG)
+
+  /* Clear fifos */
+
+  putreg32(UART_FCR_RFIFOR|UART_FCR_XFIFOR, CONSOLE_BASE+A1X_UART_FCR_OFFSET);
+
+  /* Set trigger */
+
+  putreg32(UART_FCR_FIFOE|UART_FCR_RT_HALF, CONSOLE_BASE+A1X_UART_FCR_OFFSET);
+
+  /* Set up the LCR and set DLAB=1 */
+
+  putreg32(CONSOLE_LCR_VALUE|UART_LCR_DLAB, CONSOLE_BASE+A1X_UART_LCR_OFFSET);
+
+  /* Set the BAUD divisor */
+
+  putreg32(CONSOLE_DL >> 8, CONSOLE_BASE+A1X_UART_DLH_OFFSET);
+  putreg32(CONSOLE_DL & 0xff, CONSOLE_BASE+A1X_UART_DLL_OFFSET);
+
+  /* Clear DLAB */
+
+  putreg32(CONSOLE_LCR_VALUE, CONSOLE_BASE+A1X_UART_LCR_OFFSET);
+
+  /* Configure the FIFOs */
+
+  putreg32(UART_FCR_RT_HALF|UART_FCR_XFIFOR|UART_FCR_RFIFOR|UART_FCR_FIFOE,
+           CONSOLE_BASE+A1X_UART_FCR_OFFSET);
+#endif
+#endif /* HAVE_UART_DEVICE */
+}