[dev] Add UART class driver API.

dev/class/uart_api.c

@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2013 Corey Tabaka
+ *
+ * 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.
+ */
+
+#include <err.h>
+#include <dev/class/uart.h>
+
+ssize_t class_uart_read(struct device *dev, void *buf, size_t len)
+{
+	struct uart_ops *ops = device_get_driver_ops(dev, struct uart_ops, std);
+
+	if (!ops)
+		return ERR_NOT_CONFIGURED;
+	
+	if (ops->read)
+		return ops->read(dev, buf, len);
+	else
+		return ERR_NOT_SUPPORTED;
+}
+
+ssize_t class_uart_write(struct device *dev, const void *buf, size_t len)
+{
+	struct uart_ops *ops = device_get_driver_ops(dev, struct uart_ops, std);
+
+	if (!ops)
+		return ERR_NOT_CONFIGURED;
+	
+	if (ops->write)
+		return ops->write(dev, buf, len);
+	else
+		return ERR_NOT_SUPPORTED;
+}
+

dev/rules.mk

@@ -8,5 +8,6 @@ MODULE_SRCS += \
 	$(LOCAL_DIR)/class/block_api.c \
 	$(LOCAL_DIR)/class/i2c_api.c \
 	$(LOCAL_DIR)/class/spi_api.c \
+	$(LOCAL_DIR)/class/uart_api.c \
 
 include make/module.mk

include/dev/class/uart.h

@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 2013 Corey Tabaka
+ *
+ * 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.
+ */
+#ifndef __DEV_CLASS_UART_H
+#define __DEV_CLASS_UART_H
+
+#include <dev/driver.h>
+
+/* uart interface */
+struct uart_ops {
+	struct driver_ops std;
+
+	ssize_t (*read)(struct device *dev, void *buf, size_t len);
+	ssize_t (*write)(struct device *dev, const void *buf, size_t len);
+};
+
+
+ssize_t class_uart_read(struct device *dev, void *buf, size_t len);
+ssize_t class_uart_write(struct device *dev, const void *buf, size_t len);
+
+#endif
+