libmaple/spi: Fixups, move nonportable bits into libmaple/stm32f1.

Standard family support refactoring: add STM32F1 series spi.h, spi.c,
and move anything that won't port to STM32F2 there.

As part of a general effort to be cleaner, remove the dependency on
libmaple/util.h from libmaple/spi.h by not using BIT(). Also forward
declare struct gpio_dev for spi_gpio_cfg() to remove that include.

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

1 files changed, 97 insertions, 0 deletions

diff --git a/libmaple/stm32f1/spi.c b/libmaple/stm32f1/spi.c
new file mode 100644
index 0000000..b860918
--- /dev/null
+++ b/libmaple/stm32f1/spi.c
@@ -0,0 +1,97 @@
+/******************************************************************************
+ * The MIT License
+ *
+ * Copyright (c) 2011, 2012 LeafLabs, LLC.
+ * Copyright (c) 2010 Perry Hung.
+ *
+ * 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 libmaple/stm32f1/spi.c
+ * @author Marti Bolivar <mbolivar@leaflabs.com>
+ * @brief STM32F1 SPI/I2S support.
+ */
+
+#include <libmaple/spi.h>
+#include <libmaple/gpio.h>
+
+/*
+ * Devices
+ */
+
+static spi_dev spi1 = {
+    .regs     = SPI1_BASE,
+    .clk_id   = RCC_SPI1,
+    .irq_num  = NVIC_SPI1,
+};
+/** SPI device 1 */
+spi_dev *SPI1 = &spi1;
+
+static spi_dev spi2 = {
+    .regs     = SPI2_BASE,
+    .clk_id   = RCC_SPI2,
+    .irq_num  = NVIC_SPI2,
+};
+/** SPI device 2 */
+spi_dev *SPI2 = &spi2;
+
+#if defined(STM32_HIGH_DENSITY) || defined(STM32_XL_DENSITY)
+static spi_dev spi3 = {
+    .regs     = SPI3_BASE,
+    .clk_id   = RCC_SPI3,
+    .irq_num  = NVIC_SPI3,
+};
+/** SPI device 3 */
+spi_dev *SPI3 = &spi3;
+#endif
+
+/*
+ * Routines
+ */
+
+void spi_gpio_cfg(uint8 as_master,
+                  gpio_dev *nss_dev,
+                  uint8 nss_bit,
+                  gpio_dev *comm_dev,
+                  uint8 sck_bit,
+                  uint8 miso_bit,
+                  uint8 mosi_bit) {
+    if (as_master) {
+        gpio_set_mode(nss_dev, nss_bit, GPIO_AF_OUTPUT_PP);
+        gpio_set_mode(comm_dev, sck_bit, GPIO_AF_OUTPUT_PP);
+        gpio_set_mode(comm_dev, miso_bit, GPIO_INPUT_FLOATING);
+        gpio_set_mode(comm_dev, mosi_bit, GPIO_AF_OUTPUT_PP);
+    } else {
+        gpio_set_mode(nss_dev, nss_bit, GPIO_INPUT_FLOATING);
+        gpio_set_mode(comm_dev, sck_bit, GPIO_INPUT_FLOATING);
+        gpio_set_mode(comm_dev, miso_bit, GPIO_AF_OUTPUT_PP);
+        gpio_set_mode(comm_dev, mosi_bit, GPIO_INPUT_FLOATING);
+    }
+}
+
+void spi_foreach(void (*fn)(spi_dev*)) {
+    fn(SPI1);
+    fn(SPI2);
+#if defined(STM32_HIGH_DENSITY) || defined(STM32_XL_DENSITY)
+    fn(SPI3);
+#endif
+}