[l1] Add Flash Memory Controller Register defns for L1.

Also, some of the most basic essential helper functions.

include/libopencm3/stm32/l1/flash.h

@@ -0,0 +1,125 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2010 Thomas Otto <tommi@viadmin.org>
+ * Copyright (C) 2010 Mark Butler <mbutler@physics.otago.ac.nz>
+ * Copyright (C) 2012 Karl Palsson <karlp@tweak.net.au>
+ *
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This library 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/*
+ * All extracted from PM0062 rev2, L15xx and L16xx Flash/EEPROM programming manual
+ */
+
+#ifndef LIBOPENCM3_FLASH_H
+#define LIBOPENCM3_FLASH_H
+
+#include <libopencm3/stm32/memorymap.h>
+#include <libopencm3/cm3/common.h>
+
+/* --- FLASH registers ----------------------------------------------------- */
+
+#define FLASH_ACR			MMIO32(FLASH_MEM_INTERFACE_BASE + 0x00)
+#define FLASH_PECR			MMIO32(FLASH_MEM_INTERFACE_BASE + 0x04)
+#define FLASH_PDKEYR		MMIO32(FLASH_MEM_INTERFACE_BASE + 0x08)
+#define FLASH_PEKEYR		MMIO32(FLASH_MEM_INTERFACE_BASE + 0x0C)
+#define FLASH_PRGKEYR		MMIO32(FLASH_MEM_INTERFACE_BASE + 0x10)
+#define FLASH_OPTKEYR		MMIO32(FLASH_MEM_INTERFACE_BASE + 0x14)
+#define FLASH_SR			MMIO32(FLASH_MEM_INTERFACE_BASE + 0x18)
+#define FLASH_OBR			MMIO32(FLASH_MEM_INTERFACE_BASE + 0x1c)
+#define FLASH_WRPR1			MMIO32(FLASH_MEM_INTERFACE_BASE + 0x20)
+#define FLASH_WRPR2			MMIO32(FLASH_MEM_INTERFACE_BASE + 0x80)
+#define FLASH_WRPR3			MMIO32(FLASH_MEM_INTERFACE_BASE + 0x84)
+
+/* --- FLASH_ACR values ---------------------------------------------------- */
+
+#define FLASH_RUNPD			(1 << 4)
+#define FLASH_SLEEPPD		(1 << 3)
+#define FLASH_ACC64			(1 << 2)
+#define FLASH_PRFTEN		(1 << 1)
+#define FLASH_LATENCY_0WS		0x00
+#define FLASH_LATENCY_1WS		0x01
+
+/* --- FLASH_PECR values. Program/erase control register */
+#define FLASH_OBL_LAUNCH    (1 << 18)
+#define FLASH_ERRIE         (1 << 17)
+#define FLASH_EOPIE         (1 << 16)
+#define FLASH_PARALLBANK    (1 << 15)
+#define FLASH_FPRG          (1 << 10)
+#define FLASH_ERASE         (1 << 9)
+#define FLASH_FTDW          (1 << 8)
+#define FLASH_FTDW          (1 << 8)
+#define FLASH_DATA          (1 << 4)
+#define FLASH_PROG          (1 << 3)
+#define FLASH_OPTLOCK       (1 << 2)
+#define FLASH_PRGLOCK       (1 << 1)
+#define FLASH_PELOCK        (1 << 0)
+
+/* Power down key register (FLASH_PDKEYR) */
+#define FLASH_PDKEY1        ((u32)0x04152637)
+#define FLASH_PDKEY2        ((u32)0xFAFBFCFD)
+
+/* Program/erase key register (FLASH_PEKEYR) */
+#define FLASH_PEKEY1        ((u32)0x89ABCDEF)
+#define FLASH_PEKEY2        ((u32)0x02030405)
+
+/* Program memory key register (FLASH_PRGKEYR) */
+#define FLASH_PRGKEY1       ((u32)0x8C9DAEBF)
+#define FLASH_PRGKEY2       ((u32)0x13141516)
+
+/* Option byte key register (FLASH_OPTKEYR) */
+#define FLASH_OPTKEY1       ((u32)0xFBEAD9C8)
+#define FLASH_OPTKEY2       ((u32)0x24252627)
+
+
+/* --- FLASH_SR values ----------------------------------------------------- */
+#define FLASH_OPTVERRUSR    (1 << 12)
+#define FLASH_OPTVERR       (1 << 11)
+#define FLASH_SIZEERR       (1 << 10)
+#define FLASH_PGAERR        (1 << 9)
+#define FLASH_WRPERR        (1 << 8)
+#define FLASH_READY         (1 << 3)
+#define FLASH_ENDHV         (1 << 2)
+#define FLASH_EOP			(1 << 1)
+#define FLASH_BSY			(1 << 0)
+
+/* --- FLASH_OBR values ----------------------------------------------------- */
+#define FLASH_BFB2          (1 << 23)
+#define FLASH_NRST_STDBY	(1 << 22)
+#define FLASH_NRST_STOP     (1 << 21)
+#define FLASH_IWDG_SW       (1 << 20)
+#define FLASH_BOR_OFF       (0x0 << 16)
+#define FLASH_BOR_LEVEL_1   (0x8 << 16)
+#define FLASH_BOR_LEVEL_2   (0x9 << 16)
+#define FLASH_BOR_LEVEL_3   (0xa << 16)
+#define FLASH_BOR_LEVEL_4   (0xb << 16)
+#define FLASH_BOR_LEVEL_5   (0xc << 16)
+#define FLASH_RDPRT_LEVEL_0 (0xaa)
+#define FLASH_RDPRT_LEVEL_1 (0x00)
+#define FLASH_RDPRT_LEVEL_2 (0xcc)
+
+/* --- Function prototypes ------------------------------------------------- */
+
+BEGIN_DECLS
+
+void flash_64bit_enable(void);
+void flash_64bit_disable(void);
+void flash_prefetch_enable(void);
+void flash_prefetch_disable(void);
+void flash_set_ws(u32 ws);
+
+END_DECLS
+
+#endif

lib/stm32/l1/Makefile

@@ -29,7 +29,7 @@ CFLAGS		= -Os -g -Wall -Wextra -I../../../include -fno-common \
 # ARFLAGS	= rcsv
 ARFLAGS		= rcs
 OBJS		= rcc.o gpio.o desig.o crc.o usart.o exti2.o \
-		  gpio_common_all.o gpio_common_f24.o
+		flash.o gpio_common_all.o gpio_common_f24.o
 
 VPATH += ../../usb:../:../../cm3:../common
 

lib/stm32/l1/flash.c

@@ -0,0 +1,52 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2010 Thomas Otto <tommi@viadmin.org>
+ * Copyright (C) 2010 Mark Butler <mbutler@physics.otago.ac.nz>
+ * Copyright (C) 2012 Karl Palsson <karlp@tweak.net.au>
+ *
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This library 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <libopencm3/stm32/l1/flash.h>
+
+void flash_64bit_enable(void)
+{
+	FLASH_ACR |= FLASH_ACC64;
+}
+
+void flash_64bit_disable(void)
+{
+	FLASH_ACR &= ~FLASH_ACC64;
+}
+
+void flash_prefetch_enable(void)
+{
+	FLASH_ACR |= FLASH_PRFTEN;
+}
+
+void flash_prefetch_disable(void)
+{
+	FLASH_ACR &= ~FLASH_PRFTEN;
+}
+
+void flash_set_ws(u32 ws)
+{
+	u32 reg32;
+
+	reg32 = FLASH_ACR;
+	reg32 &= ~(1 << 0);
+	reg32 |= ws;
+	FLASH_ACR = reg32;
+}