From: Yasunari Takiguchi <Yasunari.Takiguchi@xxxxxxxx> Add functions for initializing, reading and writing to the SPI device for the Sony CXD2880 DVB-T2/T tuner + demodulator. Signed-off-by: Yasunari Takiguchi <Yasunari.Takiguchi@xxxxxxxx> Signed-off-by: Masayuki Yamamoto <Masayuki.Yamamoto@xxxxxxxx> Signed-off-by: Hideki Nozawa <Hideki.Nozawa@xxxxxxxx> Signed-off-by: Kota Yonezawa <Kota.Yonezawa@xxxxxxxx> Signed-off-by: Toshihiko Matsumoto <Toshihiko.Matsumoto@xxxxxxxx> Signed-off-by: Satoshi Watanabe <Satoshi.C.Watanabe@xxxxxxxx> --- .../dvb-frontends/cxd2880/cxd2880_devio_spi.c | 147 +++++++++++++++++++++ .../dvb-frontends/cxd2880/cxd2880_devio_spi.h | 40 ++++++ drivers/media/dvb-frontends/cxd2880/cxd2880_spi.h | 51 +++++++ .../dvb-frontends/cxd2880/cxd2880_spi_device.c | 130 ++++++++++++++++++ .../dvb-frontends/cxd2880/cxd2880_spi_device.h | 45 +++++++ 5 files changed, 413 insertions(+) create mode 100644 drivers/media/dvb-frontends/cxd2880/cxd2880_devio_spi.c create mode 100644 drivers/media/dvb-frontends/cxd2880/cxd2880_devio_spi.h create mode 100644 drivers/media/dvb-frontends/cxd2880/cxd2880_spi.h create mode 100644 drivers/media/dvb-frontends/cxd2880/cxd2880_spi_device.c create mode 100644 drivers/media/dvb-frontends/cxd2880/cxd2880_spi_device.h diff --git a/drivers/media/dvb-frontends/cxd2880/cxd2880_devio_spi.c b/drivers/media/dvb-frontends/cxd2880/cxd2880_devio_spi.c new file mode 100644 index 000000000000..516efade6bf5 --- /dev/null +++ b/drivers/media/dvb-frontends/cxd2880/cxd2880_devio_spi.c @@ -0,0 +1,147 @@ +/* + * cxd2880_devio_spi.c + * Sony CXD2880 DVB-T2/T tuner + demodulator driver + * I/O interface via SPI + * + * 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_devio_spi.h" +#include "cxd2880_stdlib.h" + +#define BURST_WRITE_MAX 128 + +static enum cxd2880_ret cxd2880_io_spi_read_reg(struct cxd2880_io *io, + enum cxd2880_io_tgt tgt, + u8 sub_address, u8 *data, + u32 size) +{ + enum cxd2880_ret ret = CXD2880_RESULT_OK; + struct cxd2880_spi *spi = NULL; + u8 send_data[6]; + u8 *read_data_top = data; + + if ((!io) || (!io->if_object) || (!data)) + return CXD2880_RESULT_ERROR_ARG; + + if (sub_address + size > 0x100) + return CXD2880_RESULT_ERROR_RANGE; + + spi = (struct cxd2880_spi *)(io->if_object); + + if (tgt == CXD2880_IO_TGT_SYS) + send_data[0] = 0x0B; + else + send_data[0] = 0x0A; + + send_data[3] = 0; + send_data[4] = 0; + send_data[5] = 0; + + while (size > 0) { + send_data[1] = sub_address; + if (size > 255) + send_data[2] = 255; + else + send_data[2] = (u8)size; + + ret = + spi->write_read(spi, send_data, sizeof(send_data), + read_data_top, send_data[2]); + if (ret != CXD2880_RESULT_OK) + return ret; + + sub_address += send_data[2]; + read_data_top += send_data[2]; + size -= send_data[2]; + } + + return ret; +} + +static enum cxd2880_ret cxd2880_io_spi_write_reg(struct cxd2880_io *io, + enum cxd2880_io_tgt tgt, + u8 sub_address, + const u8 *data, u32 size) +{ + enum cxd2880_ret ret = CXD2880_RESULT_OK; + struct cxd2880_spi *spi = NULL; + u8 send_data[BURST_WRITE_MAX + 4]; + const u8 *write_data_top = data; + + if ((!io) || (!io->if_object) || (!data)) + return CXD2880_RESULT_ERROR_ARG; + + if (size > BURST_WRITE_MAX) + return CXD2880_RESULT_ERROR_OVERFLOW; + + if (sub_address + size > 0x100) + return CXD2880_RESULT_ERROR_RANGE; + + spi = (struct cxd2880_spi *)(io->if_object); + + if (tgt == CXD2880_IO_TGT_SYS) + send_data[0] = 0x0F; + else + send_data[0] = 0x0E; + + while (size > 0) { + send_data[1] = sub_address; + if (size > 255) + send_data[2] = 255; + else + send_data[2] = (u8)size; + + cxd2880_memcpy(&send_data[3], write_data_top, send_data[2]); + + if (tgt == CXD2880_IO_TGT_SYS) { + send_data[3 + send_data[2]] = 0x00; + ret = spi->write(spi, send_data, send_data[2] + 4); + } else { + ret = spi->write(spi, send_data, send_data[2] + 3); + } + if (ret != CXD2880_RESULT_OK) + return ret; + + sub_address += send_data[2]; + write_data_top += send_data[2]; + size -= send_data[2]; + } + + return ret; +} + +enum cxd2880_ret cxd2880_io_spi_create(struct cxd2880_io *io, + struct cxd2880_spi *spi, u8 slave_select) +{ + if ((!io) || (!spi)) + return CXD2880_RESULT_ERROR_ARG; + + io->read_regs = cxd2880_io_spi_read_reg; + io->write_regs = cxd2880_io_spi_write_reg; + io->write_reg = cxd2880_io_common_write_one_reg; + io->if_object = spi; + io->i2c_address_sys = 0; + io->i2c_address_demod = 0; + io->slave_select = slave_select; + + return CXD2880_RESULT_OK; +} diff --git a/drivers/media/dvb-frontends/cxd2880/cxd2880_devio_spi.h b/drivers/media/dvb-frontends/cxd2880/cxd2880_devio_spi.h new file mode 100644 index 000000000000..15934bf11935 --- /dev/null +++ b/drivers/media/dvb-frontends/cxd2880/cxd2880_devio_spi.h @@ -0,0 +1,40 @@ +/* + * cxd2880_devio_spi.h + * Sony CXD2880 DVB-T2/T tuner + demodulator driver + * I/O interface via SPI + * + * 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_DEVIO_SPI_H +#define CXD2880_DEVIO_SPI_H + +#include "cxd2880_common.h" +#include "cxd2880_io.h" +#include "cxd2880_spi.h" + +#include "cxd2880_tnrdmd.h" + +enum cxd2880_ret cxd2880_io_spi_create(struct cxd2880_io *io, + struct cxd2880_spi *spi, + u8 slave_select); + +#endif diff --git a/drivers/media/dvb-frontends/cxd2880/cxd2880_spi.h b/drivers/media/dvb-frontends/cxd2880/cxd2880_spi.h new file mode 100644 index 000000000000..81e5be747962 --- /dev/null +++ b/drivers/media/dvb-frontends/cxd2880/cxd2880_spi.h @@ -0,0 +1,51 @@ +/* + * cxd2880_spi.h + * Sony CXD2880 DVB-T2/T tuner + demodulator driver + * SPI access 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_SPI_H +#define CXD2880_SPI_H + +#include "cxd2880_common.h" + +enum cxd2880_spi_mode { + CXD2880_SPI_MODE_0, + CXD2880_SPI_MODE_1, + CXD2880_SPI_MODE_2, + CXD2880_SPI_MODE_3 +}; + +struct cxd2880_spi { + enum cxd2880_ret (*read)(struct cxd2880_spi *spi, u8 *data, + u32 size); + enum cxd2880_ret (*write)(struct cxd2880_spi *spi, const u8 *data, + u32 size); + enum cxd2880_ret (*write_read)(struct cxd2880_spi *spi, + const u8 *tx_data, u32 tx_size, + u8 *rx_data, u32 rx_size); + u32 flags; + void *user; +}; + +#endif diff --git a/drivers/media/dvb-frontends/cxd2880/cxd2880_spi_device.c b/drivers/media/dvb-frontends/cxd2880/cxd2880_spi_device.c new file mode 100644 index 000000000000..af9ed40c900b --- /dev/null +++ b/drivers/media/dvb-frontends/cxd2880/cxd2880_spi_device.c @@ -0,0 +1,130 @@ +/* + * cxd2880_spi_device.c + * Sony CXD2880 DVB-T2/T tuner + demodulator driver + * SPI access 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 <linux/spi/spi.h> + +#include "cxd2880_spi_device.h" + +static enum cxd2880_ret cxd2880_spi_device_write(struct cxd2880_spi *spi, + const u8 *data, u32 size) +{ + struct cxd2880_spi_device *spi_device = NULL; + struct spi_message msg; + struct spi_transfer tx; + int result = 0; + + if ((!spi) || (!spi->user) || (!data) || (size == 0)) + return CXD2880_RESULT_ERROR_ARG; + + spi_device = (struct cxd2880_spi_device *)(spi->user); + + memset(&tx, 0, sizeof(tx)); + tx.tx_buf = data; + tx.len = size; + + spi_message_init(&msg); + spi_message_add_tail(&tx, &msg); + result = spi_sync(spi_device->spi, &msg); + + if (result < 0) + return CXD2880_RESULT_ERROR_IO; + + return CXD2880_RESULT_OK; +} + +static enum cxd2880_ret cxd2880_spi_device_write_read(struct cxd2880_spi *spi, + const u8 *tx_data, + u32 tx_size, + u8 *rx_data, + u32 rx_size) +{ + struct cxd2880_spi_device *spi_device = NULL; + int result = 0; + + if ((!spi) || (!spi->user) || (!tx_data) || + (tx_size == 0) || (!rx_data) || (rx_size == 0)) + return CXD2880_RESULT_ERROR_ARG; + + spi_device = (struct cxd2880_spi_device *)(spi->user); + + result = spi_write_then_read(spi_device->spi, tx_data, + tx_size, rx_data, rx_size); + if (result < 0) + return CXD2880_RESULT_ERROR_IO; + + return CXD2880_RESULT_OK; +} + +enum cxd2880_ret +cxd2880_spi_device_initialize(struct cxd2880_spi_device *spi_device, + enum cxd2880_spi_mode mode, + u32 speed_hz) +{ + int result = 0; + struct spi_device *spi = spi_device->spi; + + switch (mode) { + case CXD2880_SPI_MODE_0: + spi->mode = SPI_MODE_0; + break; + case CXD2880_SPI_MODE_1: + spi->mode = SPI_MODE_1; + break; + case CXD2880_SPI_MODE_2: + spi->mode = SPI_MODE_2; + break; + case CXD2880_SPI_MODE_3: + spi->mode = SPI_MODE_3; + break; + default: + return CXD2880_RESULT_ERROR_ARG; + } + + spi->max_speed_hz = speed_hz; + spi->bits_per_word = 8; + result = spi_setup(spi); + if (result != 0) { + pr_err("spi_setup failed %d\n", result); + return CXD2880_RESULT_ERROR_ARG; + } + + return CXD2880_RESULT_OK; +} + +enum cxd2880_ret cxd2880_spi_device_create_spi(struct cxd2880_spi *spi, + struct cxd2880_spi_device *spi_device) +{ + if ((!spi) || (!spi_device)) + return CXD2880_RESULT_ERROR_ARG; + + spi->read = NULL; + spi->write = cxd2880_spi_device_write; + spi->write_read = cxd2880_spi_device_write_read; + spi->flags = 0; + spi->user = spi_device; + + return CXD2880_RESULT_OK; +} diff --git a/drivers/media/dvb-frontends/cxd2880/cxd2880_spi_device.h b/drivers/media/dvb-frontends/cxd2880/cxd2880_spi_device.h new file mode 100644 index 000000000000..343d9161d537 --- /dev/null +++ b/drivers/media/dvb-frontends/cxd2880/cxd2880_spi_device.h @@ -0,0 +1,45 @@ +/* + * cxd2880_spi_device.h + * Sony CXD2880 DVB-T2/T tuner + demodulator driver + * SPI access interface + * + * 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_SPI_DEVICE_H +#define CXD2880_SPI_DEVICE_H + +#include "cxd2880_spi.h" + +struct cxd2880_spi_device { + struct spi_device *spi; +}; + +enum cxd2880_ret +cxd2880_spi_device_initialize(struct cxd2880_spi_device *spi_device, + enum cxd2880_spi_mode mode, + u32 speedHz); + +enum cxd2880_ret +cxd2880_spi_device_create_spi(struct cxd2880_spi *spi, + struct cxd2880_spi_device *spi_device); + +#endif /* CXD2880_SPI_DEVICE_H */ -- 2.11.0 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
