TM4C129X: Framework for new Tiva clocking logic (details not yet implemented)

1 files changed, 102 insertions, 0 deletions

diff --git a/nuttx/arch/arm/src/tiva/tiva_enableclks.h b/nuttx/arch/arm/src/tiva/tiva_enableclks.h
new file mode 100644
index 000000000..ddcf9db10
--- /dev/null
+++ b/nuttx/arch/arm/src/tiva/tiva_enableclks.h
@@ -0,0 +1,102 @@
+/************************************************************************************
+ * arch/arm/src/tiva/tiva_enableclks.h
+ *
+ *   Copyright (C) 2014 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.
+ *
+ ************************************************************************************/
+
+#ifndef __ARCH_ARM_SRC_TIVA_TIVA_ENABLECLKS_H
+#define __ARCH_ARM_SRC_TIVA_TIVA_ENABLECLKS_H
+
+/************************************************************************************
+ * Included Files
+ ************************************************************************************/
+
+#include <nuttx/config.h>
+
+#include "up_arch.h"
+#include "chip.h"
+#include "chip/tiva_syscontrol.h"
+
+/************************************************************************************
+ * Pre-processor Definitions
+ ************************************************************************************/
+/* Clocks are enabled or disabled by setting or clearing a bit (b) in a system
+ * control register (a))
+ */
+
+#define tiva_enableclk(a,b)       modifyreg32((a),0,(b))
+#define tiva_disableclk(a,b)      modifyreg32((a),(b),0)
+
+/* GPIO clocking */
+
+#ifdef TIVA_SYSCON_RCGCGPIO
+#  define tiva_gpio_enableclk(p)  tiva_enableclk(TIVA_SYSCON_RCGCGPIO,SYSCON_RCGCGPIO(p))
+#  define tiva_gpio_disableclk(p) tiva_disableclk(TIVA_SYSCON_RCGCGPIO,SYSCON_RCGCGPIO(p))
+#else
+#  define tiva_gpio_enableclk(p)  tiva_enableclk(TIVA_SYSCON_RCGC2,SYSCON_RCGC2_GPIO(p))
+#  define tiva_gpio_disableclk(p) tiva_disableclk(TIVA_SYSCON_RCGC2,SYSCON_RCGC2_GPIO(p))
+#endif
+
+/* UART clocking */
+
+#ifdef TIVA_SYSCON_RCGCUART
+#  define tiva_uart_enableclk(p)  tiva_enableclk(TIVA_SYSCON_RCGCUART,SYSCON_RCGCUART(p))
+#  define tiva_uart_disableclk(p) tiva_disableclk(TIVA_SYSCON_RCGCUART,SYSCON_RCGCUART(p))
+
+#  define tiva_uart0_enableclk()  tiva_uart_enableclk(0)
+#  define tiva_uart1_enableclk()  tiva_uart_enableclk(1)
+#  define tiva_uart2_enableclk()  tiva_uart_enableclk(2)
+#  define tiva_uart3_enableclk()  tiva_uart_enableclk(3)
+#  define tiva_uart4_enableclk()  tiva_uart_enableclk(4)
+#  define tiva_uart5_enableclk()  tiva_uart_enableclk(5)
+#  define tiva_uart6_enableclk()  tiva_uart_enableclk(6)
+#  define tiva_uart7_enableclk()  tiva_uart_enableclk(7)
+
+#  define tiva_uart0_disableclk() tiva_uart_disableclk(0)
+#  define tiva_uart1_disableclk() tiva_uart_disableclk(1)
+#  define tiva_uart2_disableclk() tiva_uart_disableclk(2)
+#  define tiva_uart3_disableclk() tiva_uart_disableclk(3)
+#  define tiva_uart4_disableclk() tiva_uart_disableclk(4)
+#  define tiva_uart5_disableclk() tiva_uart_disableclk(5)
+#  define tiva_uart6_disableclk() tiva_uart_disableclk(6)
+#  define tiva_uart7_disableclk() tiva_uart_disableclk(7)
+#else
+#  define tiva_uart0_enableclk()  tiva_enableclk(TIVA_SYSCON_RCGC1,SYSCON_RCGC1_UART0)
+#  define tiva_uart1_enableclk()  tiva_enableclk(TIVA_SYSCON_RCGC1,SYSCON_RCGC1_UART1)
+#  define tiva_uart2_enableclk()  tiva_enableclk(TIVA_SYSCON_RCGC1,SYSCON_RCGC1_UART2)
+
+#  define tiva_uart0_disableclk() tiva_disableclk(TIVA_SYSCON_RCGC1,SYSCON_RCGC1_UART0)
+#  define tiva_uart1_disableclk() tiva_disableclk(TIVA_SYSCON_RCGC1,SYSCON_RCGC1_UART1)
+#  define tiva_uart2_disableclk() tiva_disableclk(TIVA_SYSCON_RCGC1,SYSCON_RCGC1_UART2)
+#endif
+
+#endif /* __ARCH_ARM_SRC_TIVA_TIVA_ENABLECLKS_H */