Make BKP support STM32F1-only.

- libmaple/bkp.h: Mark availability restriction.

- Move libmaple/bkp.c to libmaple/stm32f1; adjust rules.mk files
  accordingly.

Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>

1 files changed, 0 insertions, 129 deletions

diff --git a/libmaple/bkp.c b/libmaple/bkp.c
deleted file mode 100644
index 62783e7..0000000
--- a/libmaple/bkp.c
+++ /dev/null
@@ -1,129 +0,0 @@
-/******************************************************************************
- * The MIT License
- *
- * Copyright (c) 2010 LeafLabs, LLC.
- *
- * Permission is hereby granted, free of charge, to any person
- * obtaining a copy of this software and associated documentation
- * files (the "Software"), to deal in the Software without
- * restriction, including without limitation the rights to use, copy,
- * modify, merge, publish, distribute, sublicense, and/or sell copies
- * of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be
- * included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
- * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
- * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *****************************************************************************/
-
-/**
- * @file bkp.c
- * @brief Backup register support.
- */
-
-#include <libmaple/bkp.h>
-#include <libmaple/pwr.h>
-#include <libmaple/rcc.h>
-#include <libmaple/bitband.h>
-
-static inline __io uint32* data_register(uint8 reg);
-
-bkp_dev bkp = {
-    .regs = BKP_BASE,
-};
-/** Backup device. */
-const bkp_dev *BKP = &bkp;
-
-/**
- * @brief Initialize backup interface.
- *
- * Enables the power and backup interface clocks, and resets the
- * backup device.
- */
-void bkp_init(void) {
-    /* Don't call pwr_init(), or you'll reset the device.  We just
-     * need the clock. */
-    rcc_clk_enable(RCC_PWR);
-    rcc_clk_enable(RCC_BKP);
-    rcc_reset_dev(RCC_BKP);
-}
-
-/**
- * Enable write access to the backup registers.  Backup interface must
- * be initialized for subsequent register writes to work.
- * @see bkp_init()
- */
-void bkp_enable_writes(void) {
-    *bb_perip(&PWR_BASE->CR, PWR_CR_DBP) = 1;
-}
-
-/**
- * Disable write access to the backup registers.
- */
-void bkp_disable_writes(void) {
-    *bb_perip(&PWR_BASE->CR, PWR_CR_DBP) = 0;
-}
-
-/**
- * Read a value from given backup data register.
- * @param reg Data register to read, from 1 to BKP_NR_DATA_REGS (10 on
- *            medium-density devices, 42 on high-density devices).
- */
-uint16 bkp_read(uint8 reg) {
-    __io uint32* dr = data_register(reg);
-    if (!dr) {
-        ASSERT(0);                  /* nonexistent register */
-        return 0;
-    }
-    return (uint16)*dr;
-}
-
-/**
- * @brief Write a value to given data register.
- *
- * Write access to backup registers must be enabled.
- *
- * @param reg Data register to write, from 1 to BKP_NR_DATA_REGS (10
- *            on medium-density devices, 42 on high-density devices).
- * @param val Value to write into the register.
- * @see bkp_enable_writes()
- */
-void bkp_write(uint8 reg, uint16 val) {
-    __io uint32* dr = data_register(reg);
-    if (!dr) {
-        ASSERT(0);                  /* nonexistent register */
-        return;
-    }
-    *dr = (uint32)val;
-}
-
-/*
- * Data register memory layout is not contiguous. It's split up from
- * 1--NR_LOW_DRS, beginning at BKP_BASE->DR1, through to
- * (NR_LOW_DRS+1)--BKP_NR_DATA_REGS, beginning at BKP_BASE->DR11.
- */
-#define NR_LOW_DRS 10
-
-static inline __io uint32* data_register(uint8 reg) {
-    if (reg < 1 || reg > BKP_NR_DATA_REGS) {
-        return 0;
-    }
-
-#if BKP_NR_DATA_REGS == NR_LOW_DRS
-    return (uint32*)BKP_BASE + reg;
-#else
-    if (reg <= NR_LOW_DRS) {
-        return (uint32*)BKP_BASE + reg;
-    } else {
-        return (uint32*)&(BKP_BASE->DR11) + (reg - NR_LOW_DRS - 1);
-    }
-#endif
-}