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Message-ID: <20170414021701.17133-1-Yasunari.Takiguchi@sony.com>
Date: Fri, 14 Apr 2017 11:17:01 +0900
From: <Yasunari.Takiguchi@...y.com>
To: <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
<linux-media@...r.kernel.org>
CC: <tbird20d@...il.com>, <frowand.list@...il.com>,
Yasunari Takiguchi <Yasunari.Takiguchi@...y.com>,
Masayuki Yamamoto <Masayuki.Yamamoto@...y.com>,
Hideki Nozawa <Hideki.Nozawa@...y.com>,
"Kota Yonezawa" <Kota.Yonezawa@...y.com>,
Toshihiko Matsumoto <Toshihiko.Matsumoto@...y.com>,
Satoshi Watanabe <Satoshi.C.Watanabe@...y.com>
Subject: [PATCH v2 03/15] [media] cxd2880: Add common files for the driver
From: Yasunari Takiguchi <Yasunari.Takiguchi@...y.com>
These are common files for the driver for the
Sony CXD2880 DVB-T2/T tuner + demodulator.
These contains helper functions for the driver.
Signed-off-by: Yasunari Takiguchi <Yasunari.Takiguchi@...y.com>
Signed-off-by: Masayuki Yamamoto <Masayuki.Yamamoto@...y.com>
Signed-off-by: Hideki Nozawa <Hideki.Nozawa@...y.com>
Signed-off-by: Kota Yonezawa <Kota.Yonezawa@...y.com>
Signed-off-by: Toshihiko Matsumoto <Toshihiko.Matsumoto@...y.com>
Signed-off-by: Satoshi Watanabe <Satoshi.C.Watanabe@...y.com>
---
drivers/media/dvb-frontends/cxd2880/cxd2880.h | 46 ++++++++++++
.../media/dvb-frontends/cxd2880/cxd2880_common.c | 84 +++++++++++++++++++++
.../media/dvb-frontends/cxd2880/cxd2880_common.h | 86 ++++++++++++++++++++++
drivers/media/dvb-frontends/cxd2880/cxd2880_io.c | 68 +++++++++++++++++
drivers/media/dvb-frontends/cxd2880/cxd2880_io.h | 62 ++++++++++++++++
.../media/dvb-frontends/cxd2880/cxd2880_stdlib.h | 35 +++++++++
.../dvb-frontends/cxd2880/cxd2880_stopwatch_port.c | 71 ++++++++++++++++++
7 files changed, 452 insertions(+)
create mode 100644 drivers/media/dvb-frontends/cxd2880/cxd2880.h
create mode 100644 drivers/media/dvb-frontends/cxd2880/cxd2880_common.c
create mode 100644 drivers/media/dvb-frontends/cxd2880/cxd2880_common.h
create mode 100644 drivers/media/dvb-frontends/cxd2880/cxd2880_io.c
create mode 100644 drivers/media/dvb-frontends/cxd2880/cxd2880_io.h
create mode 100644 drivers/media/dvb-frontends/cxd2880/cxd2880_stdlib.h
create mode 100644 drivers/media/dvb-frontends/cxd2880/cxd2880_stopwatch_port.c
diff --git a/drivers/media/dvb-frontends/cxd2880/cxd2880.h b/drivers/media/dvb-frontends/cxd2880/cxd2880.h
new file mode 100644
index 000000000000..281f9a784eb5
--- /dev/null
+++ b/drivers/media/dvb-frontends/cxd2880/cxd2880.h
@@ -0,0 +1,46 @@
+/*
+ * cxd2880.h
+ * Sony CXD2880 DVB-T2/T tuner + demodulator driver public definitions
+ *
+ * Copyright (C) 2016, 2017 Sony Semiconductor Solutions Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; version 2 of the License.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
+ * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef CXD2880_H
+#define CXD2880_H
+
+struct cxd2880_config {
+ struct spi_device *spi;
+ struct mutex *spi_mutex; /* For SPI access exclusive control */
+};
+
+#if IS_REACHABLE(CONFIG_DVB_CXD2880)
+extern struct dvb_frontend *cxd2880_attach(struct dvb_frontend *fe,
+ struct cxd2880_config *cfg);
+#else
+static inline struct dvb_frontend *cxd2880_attach(struct dvb_frontend *fe,
+ struct cxd2880_config *cfg)
+{
+ pr_warn("%s: driver disabled by Kconfig\n", __func__);
+ return NULL;
+}
+#endif /* CONFIG_DVB_CXD2880 */
+
+#endif /* CXD2880_H */
diff --git a/drivers/media/dvb-frontends/cxd2880/cxd2880_common.c b/drivers/media/dvb-frontends/cxd2880/cxd2880_common.c
new file mode 100644
index 000000000000..850f3a76b2c7
--- /dev/null
+++ b/drivers/media/dvb-frontends/cxd2880/cxd2880_common.c
@@ -0,0 +1,84 @@
+/*
+ * cxd2880_common.c
+ * Sony CXD2880 DVB-T2/T tuner + demodulator driver
+ * common functions
+ *
+ * Copyright (C) 2016, 2017 Sony Semiconductor Solutions Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; version 2 of the License.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
+ * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "cxd2880_common.h"
+
+#define MASKUPPER(n) (((n) == 0) ? 0 : (0xFFFFFFFFU << (32 - (n))))
+#define MASKLOWER(n) (((n) == 0) ? 0 : (0xFFFFFFFFU >> (32 - (n))))
+
+int cxd2880_convert2s_complement(u32 value, u32 bitlen)
+{
+ if ((bitlen == 0) || (bitlen >= 32))
+ return (int)value;
+
+ if (value & (u32)(1 << (bitlen - 1)))
+ return (int)(MASKUPPER(32 - bitlen) | value);
+ else
+ return (int)(MASKLOWER(bitlen) & value);
+}
+
+u32 cxd2880_bit_split_from_byte_array(u8 *array, u32 start_bit, u32 bit_num)
+{
+ u32 value = 0;
+ u8 *array_read;
+ u8 bit_read;
+ u32 len_remain;
+
+ if (!array)
+ return 0;
+ if ((bit_num == 0) || (bit_num > 32))
+ return 0;
+
+ array_read = array + (start_bit / 8);
+ bit_read = (u8)(start_bit % 8);
+ len_remain = bit_num;
+
+ if (bit_read != 0) {
+ if (((int)len_remain) <= 8 - bit_read) {
+ value = (*array_read) >> ((8 - bit_read) - len_remain);
+ len_remain = 0;
+ } else {
+ value = *array_read++;
+ len_remain -= 8 - bit_read;
+ }
+ }
+
+ while (len_remain > 0) {
+ if (len_remain < 8) {
+ value <<= len_remain;
+ value |= (*array_read++ >> (8 - len_remain));
+ len_remain = 0;
+ } else {
+ value <<= 8;
+ value |= (u32)(*array_read++);
+ len_remain -= 8;
+ }
+ }
+
+ value &= MASKLOWER(bit_num);
+
+ return value;
+}
diff --git a/drivers/media/dvb-frontends/cxd2880/cxd2880_common.h b/drivers/media/dvb-frontends/cxd2880/cxd2880_common.h
new file mode 100644
index 000000000000..b1ecb44bca10
--- /dev/null
+++ b/drivers/media/dvb-frontends/cxd2880/cxd2880_common.h
@@ -0,0 +1,86 @@
+/*
+ * cxd2880_common.h
+ * Sony CXD2880 DVB-T2/T tuner + demodulator driver common definitions
+ *
+ * Copyright (C) 2016, 2017 Sony Semiconductor Solutions Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; version 2 of the License.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
+ * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef CXD2880_COMMON_H
+#define CXD2880_COMMON_H
+
+#include <linux/types.h>
+
+#ifndef NULL
+#ifdef __cplusplus
+#define NULL 0
+#else
+#define NULL ((void *)0)
+#endif
+#endif
+
+#include <linux/delay.h>
+#define CXD2880_SLEEP(n) msleep(n)
+#ifndef CXD2880_SLEEP_IN_MON
+#define CXD2880_SLEEP_IN_MON(n, obj) CXD2880_SLEEP(n)
+#endif
+
+#define CXD2880_ARG_UNUSED(arg) ((void)(arg))
+
+enum cxd2880_ret {
+ CXD2880_RESULT_OK,
+ CXD2880_RESULT_ERROR_ARG,
+ CXD2880_RESULT_ERROR_IO,
+ CXD2880_RESULT_ERROR_SW_STATE,
+ CXD2880_RESULT_ERROR_HW_STATE,
+ CXD2880_RESULT_ERROR_TIMEOUT,
+ CXD2880_RESULT_ERROR_UNLOCK,
+ CXD2880_RESULT_ERROR_RANGE,
+ CXD2880_RESULT_ERROR_NOSUPPORT,
+ CXD2880_RESULT_ERROR_CANCEL,
+ CXD2880_RESULT_ERROR_OTHER,
+ CXD2880_RESULT_ERROR_OVERFLOW,
+ CXD2880_RESULT_OK_CONFIRM
+};
+
+int cxd2880_convert2s_complement(u32 value, u32 bitlen);
+
+u32 cxd2880_bit_split_from_byte_array(u8 *array, u32 start_bit, u32 bit_num);
+
+struct cxd2880_atomic {
+ int counter;
+};
+
+#define cxd2880_atomic_set(a, i) ((a)->counter = i)
+#define cxd2880_atomic_read(a) ((a)->counter)
+
+struct cxd2880_stopwatch {
+ u32 start_time;
+};
+
+enum cxd2880_ret cxd2880_stopwatch_start(struct cxd2880_stopwatch *stopwatch);
+
+enum cxd2880_ret cxd2880_stopwatch_sleep(struct cxd2880_stopwatch *stopwatch,
+ u32 ms);
+
+enum cxd2880_ret cxd2880_stopwatch_elapsed(struct cxd2880_stopwatch *stopwatch,
+ u32 *elapsed);
+
+#endif
diff --git a/drivers/media/dvb-frontends/cxd2880/cxd2880_io.c b/drivers/media/dvb-frontends/cxd2880/cxd2880_io.c
new file mode 100644
index 000000000000..f0f82055a953
--- /dev/null
+++ b/drivers/media/dvb-frontends/cxd2880/cxd2880_io.c
@@ -0,0 +1,68 @@
+/*
+ * cxd2880_io.c
+ * Sony CXD2880 DVB-T2/T tuner + demodulator driver
+ * register I/O interface functions
+ *
+ * Copyright (C) 2016, 2017 Sony Semiconductor Solutions Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; version 2 of the License.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
+ * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "cxd2880_io.h"
+
+enum cxd2880_ret cxd2880_io_common_write_one_reg(struct cxd2880_io *io,
+ enum cxd2880_io_tgt tgt,
+ u8 sub_address, u8 data)
+{
+ enum cxd2880_ret ret = CXD2880_RESULT_OK;
+
+ if (!io)
+ return CXD2880_RESULT_ERROR_ARG;
+
+ ret = io->write_regs(io, tgt, sub_address, &data, 1);
+
+ return ret;
+}
+
+enum cxd2880_ret cxd2880_io_set_reg_bits(struct cxd2880_io *io,
+ enum cxd2880_io_tgt tgt,
+ u8 sub_address, u8 data, u8 mask)
+{
+ enum cxd2880_ret ret = CXD2880_RESULT_OK;
+
+ if (!io)
+ return CXD2880_RESULT_ERROR_ARG;
+
+ if (mask == 0x00)
+ return CXD2880_RESULT_OK;
+
+ if (mask != 0xFF) {
+ u8 rdata = 0x00;
+
+ ret = io->read_regs(io, tgt, sub_address, &rdata, 1);
+ if (ret != CXD2880_RESULT_OK)
+ return ret;
+
+ data = (u8)((data & mask) | (rdata & (mask ^ 0xFF)));
+ }
+
+ ret = io->write_reg(io, tgt, sub_address, data);
+
+ return ret;
+}
diff --git a/drivers/media/dvb-frontends/cxd2880/cxd2880_io.h b/drivers/media/dvb-frontends/cxd2880/cxd2880_io.h
new file mode 100644
index 000000000000..4d6db13cf910
--- /dev/null
+++ b/drivers/media/dvb-frontends/cxd2880/cxd2880_io.h
@@ -0,0 +1,62 @@
+/*
+ * cxd2880_io.h
+ * Sony CXD2880 DVB-T2/T tuner + demodulator driver
+ * register I/O interface definitions
+ *
+ * Copyright (C) 2016, 2017 Sony Semiconductor Solutions Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; version 2 of the License.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
+ * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef CXD2880_IO_H
+#define CXD2880_IO_H
+
+#include "cxd2880_common.h"
+
+enum cxd2880_io_tgt {
+ CXD2880_IO_TGT_SYS,
+ CXD2880_IO_TGT_DMD
+};
+
+struct cxd2880_io {
+ enum cxd2880_ret (*read_regs)(struct cxd2880_io *io,
+ enum cxd2880_io_tgt tgt, u8 sub_address,
+ u8 *data, u32 size);
+ enum cxd2880_ret (*write_regs)(struct cxd2880_io *io,
+ enum cxd2880_io_tgt tgt, u8 sub_address,
+ const u8 *data, u32 size);
+ enum cxd2880_ret (*write_reg)(struct cxd2880_io *io,
+ enum cxd2880_io_tgt tgt, u8 sub_address,
+ u8 data);
+ void *if_object;
+ u8 i2c_address_sys;
+ u8 i2c_address_demod;
+ u8 slave_select;
+ void *user;
+};
+
+enum cxd2880_ret cxd2880_io_common_write_one_reg(struct cxd2880_io *io,
+ enum cxd2880_io_tgt tgt,
+ u8 sub_address, u8 data);
+
+enum cxd2880_ret cxd2880_io_set_reg_bits(struct cxd2880_io *io,
+ enum cxd2880_io_tgt tgt,
+ u8 sub_address, u8 data, u8 mask);
+
+#endif
diff --git a/drivers/media/dvb-frontends/cxd2880/cxd2880_stdlib.h b/drivers/media/dvb-frontends/cxd2880/cxd2880_stdlib.h
new file mode 100644
index 000000000000..b9ca1b9df110
--- /dev/null
+++ b/drivers/media/dvb-frontends/cxd2880/cxd2880_stdlib.h
@@ -0,0 +1,35 @@
+/*
+ * cxd2880_stdlib.h
+ * Sony CXD2880 DVB-T2/T tuner + demodulator driver
+ * standard lib function aliases
+ *
+ * Copyright (C) 2016, 2017 Sony Semiconductor Solutions Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; version 2 of the License.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
+ * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef CXD2880_STDLIB_H
+#define CXD2880_STDLIB_H
+
+#include <linux/string.h>
+
+#define cxd2880_memcpy memcpy
+#define cxd2880_memset memset
+
+#endif
diff --git a/drivers/media/dvb-frontends/cxd2880/cxd2880_stopwatch_port.c b/drivers/media/dvb-frontends/cxd2880/cxd2880_stopwatch_port.c
new file mode 100644
index 000000000000..14ad6aa6c4c0
--- /dev/null
+++ b/drivers/media/dvb-frontends/cxd2880/cxd2880_stopwatch_port.c
@@ -0,0 +1,71 @@
+/*
+ * cxd2880_stopwatch_port.c
+ * Sony CXD2880 DVB-T2/T tuner + demodulator driver
+ * time measurement functions
+ *
+ * Copyright (C) 2016, 2017 Sony Semiconductor Solutions Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; version 2 of the License.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
+ * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "cxd2880_common.h"
+
+#include <linux/ktime.h>
+#include <linux/time.h>
+#include <linux/timekeeping.h>
+
+static u32 get_time_count(void)
+{
+ struct timespec tp;
+
+ getnstimeofday(&tp);
+
+ return (u32)((tp.tv_sec * 1000) + (tp.tv_nsec / 1000000));
+}
+
+enum cxd2880_ret cxd2880_stopwatch_start(struct cxd2880_stopwatch *stopwatch)
+{
+ if (!stopwatch)
+ return CXD2880_RESULT_ERROR_ARG;
+
+ stopwatch->start_time = get_time_count();
+
+ return CXD2880_RESULT_OK;
+}
+
+enum cxd2880_ret cxd2880_stopwatch_sleep(struct cxd2880_stopwatch *stopwatch,
+ u32 ms)
+{
+ if (!stopwatch)
+ return CXD2880_RESULT_ERROR_ARG;
+ CXD2880_ARG_UNUSED(*stopwatch);
+ CXD2880_SLEEP(ms);
+
+ return CXD2880_RESULT_OK;
+}
+
+enum cxd2880_ret cxd2880_stopwatch_elapsed(struct cxd2880_stopwatch *stopwatch,
+ u32 *elapsed)
+{
+ if (!stopwatch || !elapsed)
+ return CXD2880_RESULT_ERROR_ARG;
+ *elapsed = get_time_count() - stopwatch->start_time;
+
+ return CXD2880_RESULT_OK;
+}
--
2.11.0
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