[rtems commit] libchip: Add I2C SEMTECH SC620 octal LED driver
Sebastian Huber
sebh at rtems.org
Wed Jan 9 15:41:06 UTC 2013
Module: rtems
Branch: master
Commit: fb070e054d514e96bd2e9213ffc7cb2a4466bb3e
Changeset: http://git.rtems.org/rtems/commit/?id=fb070e054d514e96bd2e9213ffc7cb2a4466bb3e
Author: Sebastian Huber <sebastian.huber at embedded-brains.de>
Date: Wed Jan 9 14:31:20 2013 +0100
libchip: Add I2C SEMTECH SC620 octal LED driver
---
c/src/libchip/Makefile.am | 2 +
c/src/libchip/i2c/i2c-sc620.c | 95 +++++++++++++++++++++++++++++++++++++++++
c/src/libchip/i2c/i2c-sc620.h | 40 +++++++++++++++++
c/src/libchip/preinstall.am | 4 ++
4 files changed, 141 insertions(+), 0 deletions(-)
diff --git a/c/src/libchip/Makefile.am b/c/src/libchip/Makefile.am
index 46c06b4..5e4ffab 100644
--- a/c/src/libchip/Makefile.am
+++ b/c/src/libchip/Makefile.am
@@ -67,6 +67,7 @@ EXTRA_DIST += rtc/README.ds1643 rtc/README.icm7170 rtc/README.m48t08 \
# i2c
include_libchip_HEADERS += i2c/i2c-ds1621.h \
i2c/i2c-2b-eeprom.h \
+ i2c/i2c-sc620.h \
i2c/spi-memdrv.h \
i2c/spi-flash-m25p40.h \
i2c/spi-fram-fm25l256.h \
@@ -82,6 +83,7 @@ libi2cio_a_SOURCES = i2c/i2c-ds1621.h \
i2c/spi-fram-fm25l256.h \
i2c/i2c-ds1621.c \
i2c/i2c-2b-eeprom.c \
+ i2c/i2c-sc620.c \
i2c/spi-memdrv.c \
i2c/spi-flash-m25p40.c \
i2c/spi-fram-fm25l256.c \
diff --git a/c/src/libchip/i2c/i2c-sc620.c b/c/src/libchip/i2c/i2c-sc620.c
new file mode 100644
index 0000000..105d35d
--- /dev/null
+++ b/c/src/libchip/i2c/i2c-sc620.c
@@ -0,0 +1,95 @@
+/**
+ * @file
+ *
+ * @brief I2C Driver for SEMTECH SC620 Octal LED Driver
+ */
+
+/*
+ * Copyright (c) 2013 embedded brains GmbH. All rights reserved.
+ *
+ * embedded brains GmbH
+ * Obere Lagerstr. 30
+ * 82178 Puchheim
+ * Germany
+ * <rtems at embedded-brains.de>
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rtems.com/license/LICENSE.
+ */
+
+#ifdef HAVE_CONFIG_H
+ #include "config.h"
+#endif
+
+#include <libchip/i2c-sc620.h>
+
+#include <rtems/libio.h>
+
+#define SC620_REG_COUNT 10
+
+static rtems_status_code i2c_sc620_write(
+ rtems_device_major_number major,
+ rtems_device_minor_number minor,
+ void *arg
+)
+{
+ rtems_status_code sc = RTEMS_IO_ERROR;
+ rtems_libio_rw_args_t *rw = arg;
+ unsigned char *buf = (unsigned char *) &rw->buffer[0];
+
+ if (rw->count == 2 && buf[0] < SC620_REG_COUNT) {
+ int rv;
+
+ rv = rtems_libi2c_start_write_bytes(
+ minor, buf, 2
+ );
+ if (rv == 2) {
+ sc = rtems_libi2c_send_stop(minor);
+ }
+ }
+
+ rw->bytes_moved = sc == RTEMS_SUCCESSFUL ? 2 : 0;
+
+ return sc;
+}
+
+static rtems_status_code i2c_sc620_read(
+ rtems_device_major_number major,
+ rtems_device_minor_number minor,
+ void *arg
+)
+{
+ rtems_status_code sc = RTEMS_IO_ERROR;
+ rtems_libio_rw_args_t *rw = arg;
+ unsigned char *buf = (unsigned char *) &rw->buffer[0];
+
+ if (rw->count == 1 && buf[0] < SC620_REG_COUNT) {
+ int rv;
+
+ rv = rtems_libi2c_start_write_bytes(minor, buf, 1);
+ if (rv == 1) {
+ sc = rtems_libi2c_send_addr(minor, 0);
+ if (sc == RTEMS_SUCCESSFUL) {
+ rv = rtems_libi2c_read_bytes(minor, buf, 1);
+ if (rv == 1) {
+ sc = rtems_libi2c_send_stop(minor);
+ }
+ }
+ }
+ }
+
+ rw->bytes_moved = sc == RTEMS_SUCCESSFUL ? 1 : 0;
+
+ return sc;
+}
+
+static rtems_driver_address_table i2c_sc620_ops = {
+ .read_entry = i2c_sc620_read,
+ .write_entry = i2c_sc620_write
+};
+
+rtems_libi2c_drv_t i2c_sc620_driver = {
+ .ops = &i2c_sc620_ops,
+ .size = sizeof(i2c_sc620_driver)
+};
diff --git a/c/src/libchip/i2c/i2c-sc620.h b/c/src/libchip/i2c/i2c-sc620.h
new file mode 100644
index 0000000..119cd3d
--- /dev/null
+++ b/c/src/libchip/i2c/i2c-sc620.h
@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 2013 embedded brains GmbH. All rights reserved.
+ *
+ * embedded brains GmbH
+ * Dornierstr. 4
+ * 82178 Puchheim
+ * Germany
+ * <rtems at embedded-brains.de>
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rtems.com/license/LICENSE.
+ */
+
+#ifndef I2C_SC620_H
+#define I2C_SC620_H
+
+#include <rtems/libi2c.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+/**
+ * @brief I2C driver for SEMTECH SC620 octal LED driver.
+ *
+ * A write() must use two character buffer. The buffer[0] value specifies the
+ * register and the buffer[1] value specifies the register data.
+ *
+ * A read() must use a one character buffer. The buffer[0] value specifies the
+ * register on function entry. The buffer[0] value contains the register value
+ * after a successful operation.
+ */
+extern rtems_libi2c_drv_t i2c_sc620_driver;
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* I2C_SC620_H */
diff --git a/c/src/libchip/preinstall.am b/c/src/libchip/preinstall.am
index 51c9a4d..7e80d6d 100644
--- a/c/src/libchip/preinstall.am
+++ b/c/src/libchip/preinstall.am
@@ -126,6 +126,10 @@ $(PROJECT_INCLUDE)/libchip/i2c-2b-eeprom.h: i2c/i2c-2b-eeprom.h $(PROJECT_INCLUD
$(INSTALL_DATA) $< $(PROJECT_INCLUDE)/libchip/i2c-2b-eeprom.h
PREINSTALL_FILES += $(PROJECT_INCLUDE)/libchip/i2c-2b-eeprom.h
+$(PROJECT_INCLUDE)/libchip/i2c-sc620.h: i2c/i2c-sc620.h $(PROJECT_INCLUDE)/libchip/$(dirstamp)
+ $(INSTALL_DATA) $< $(PROJECT_INCLUDE)/libchip/i2c-sc620.h
+PREINSTALL_FILES += $(PROJECT_INCLUDE)/libchip/i2c-sc620.h
+
$(PROJECT_INCLUDE)/libchip/spi-memdrv.h: i2c/spi-memdrv.h $(PROJECT_INCLUDE)/libchip/$(dirstamp)
$(INSTALL_DATA) $< $(PROJECT_INCLUDE)/libchip/spi-memdrv.h
PREINSTALL_FILES += $(PROJECT_INCLUDE)/libchip/spi-memdrv.h
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