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author | Yasunari Takiguchi <Yasunari.Takiguchi@sony.com> | 2018-01-18 03:48:58 -0500 |
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committer | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2018-03-07 04:40:13 -0500 |
commit | 4e67e6cb06cd9a43cfdd080308aeefec0dc14f2f (patch) | |
tree | 4664808713de9c1007c957e510a29ad5b7e6379e /drivers/media/dvb-frontends | |
parent | 1a3ef038d09e66489f95c5cd67d815670f9cabdc (diff) | |
download | linux-stable-4e67e6cb06cd9a43cfdd080308aeefec0dc14f2f.tar.gz linux-stable-4e67e6cb06cd9a43cfdd080308aeefec0dc14f2f.tar.bz2 linux-stable-4e67e6cb06cd9a43cfdd080308aeefec0dc14f2f.zip |
media: cxd2880: Add spi device IO routines
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@sony.com>
Signed-off-by: Masayuki Yamamoto <Masayuki.Yamamoto@sony.com>
Signed-off-by: Hideki Nozawa <Hideki.Nozawa@sony.com>
Signed-off-by: Kota Yonezawa <Kota.Yonezawa@sony.com>
Signed-off-by: Toshihiko Matsumoto <Toshihiko.Matsumoto@sony.com>
Signed-off-by: Satoshi Watanabe <Satoshi.C.Watanabe@sony.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Diffstat (limited to 'drivers/media/dvb-frontends')
5 files changed, 325 insertions, 0 deletions
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..d2e37c95d748 --- /dev/null +++ b/drivers/media/dvb-frontends/cxd2880/cxd2880_devio_spi.c @@ -0,0 +1,129 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * cxd2880_devio_spi.c + * Sony CXD2880 DVB-T2/T tuner + demodulator driver + * I/O interface via SPI + * + * Copyright (C) 2016, 2017, 2018 Sony Semiconductor Solutions Corporation + */ + +#include "cxd2880_devio_spi.h" + +#define BURST_WRITE_MAX 128 + +static int cxd2880_io_spi_read_reg(struct cxd2880_io *io, + enum cxd2880_io_tgt tgt, + u8 sub_address, u8 *data, + u32 size) +{ + int ret; + struct cxd2880_spi *spi = NULL; + u8 send_data[6]; + u8 *read_data_top = data; + + if (!io || !io->if_object || !data) + return -EINVAL; + + if (sub_address + size > 0x100) + return -EINVAL; + + 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] = size; + + ret = + spi->write_read(spi, send_data, sizeof(send_data), + read_data_top, send_data[2]); + if (ret) + return ret; + + sub_address += send_data[2]; + read_data_top += send_data[2]; + size -= send_data[2]; + } + + return ret; +} + +static int cxd2880_io_spi_write_reg(struct cxd2880_io *io, + enum cxd2880_io_tgt tgt, + u8 sub_address, + const u8 *data, u32 size) +{ + int ret; + 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 -EINVAL; + + if (size > BURST_WRITE_MAX) + return -EINVAL; + + if (sub_address + size > 0x100) + return -EINVAL; + + 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] = size; + + 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) + return ret; + + sub_address += send_data[2]; + write_data_top += send_data[2]; + size -= send_data[2]; + } + + return ret; +} + +int cxd2880_io_spi_create(struct cxd2880_io *io, + struct cxd2880_spi *spi, u8 slave_select) +{ + if (!io || !spi) + return -EINVAL; + + 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 0; +} 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..27f7cb12fad4 --- /dev/null +++ b/drivers/media/dvb-frontends/cxd2880/cxd2880_devio_spi.h @@ -0,0 +1,23 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * cxd2880_devio_spi.h + * Sony CXD2880 DVB-T2/T tuner + demodulator driver + * I/O interface via SPI + * + * Copyright (C) 2016, 2017, 2018 Sony Semiconductor Solutions Corporation + */ + +#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" + +int 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..2be207461847 --- /dev/null +++ b/drivers/media/dvb-frontends/cxd2880/cxd2880_spi.h @@ -0,0 +1,34 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * cxd2880_spi.h + * Sony CXD2880 DVB-T2/T tuner + demodulator driver + * SPI access definitions + * + * Copyright (C) 2016, 2017, 2018 Sony Semiconductor Solutions Corporation + */ + +#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 { + int (*read)(struct cxd2880_spi *spi, u8 *data, + u32 size); + int (*write)(struct cxd2880_spi *spi, const u8 *data, + u32 size); + int (*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..b8cbaa8d7aff --- /dev/null +++ b/drivers/media/dvb-frontends/cxd2880/cxd2880_spi_device.c @@ -0,0 +1,113 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * cxd2880_spi_device.c + * Sony CXD2880 DVB-T2/T tuner + demodulator driver + * SPI access functions + * + * Copyright (C) 2016, 2017, 2018 Sony Semiconductor Solutions Corporation + */ + +#include <linux/spi/spi.h> + +#include "cxd2880_spi_device.h" + +static int 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 -EINVAL; + + 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 -EIO; + + return 0; +} + +static int 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 || !rx_data || !rx_size) + return -EINVAL; + + spi_device = spi->user; + + result = spi_write_then_read(spi_device->spi, tx_data, + tx_size, rx_data, rx_size); + if (result < 0) + return -EIO; + + return 0; +} + +int +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 -EINVAL; + } + + 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 -EINVAL; + } + + return 0; +} + +int cxd2880_spi_device_create_spi(struct cxd2880_spi *spi, + struct cxd2880_spi_device *spi_device) +{ + if (!spi || !spi_device) + return -EINVAL; + + 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 0; +} 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..05e3a03de3a3 --- /dev/null +++ b/drivers/media/dvb-frontends/cxd2880/cxd2880_spi_device.h @@ -0,0 +1,26 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * cxd2880_spi_device.h + * Sony CXD2880 DVB-T2/T tuner + demodulator driver + * SPI access interface + * + * Copyright (C) 2016, 2017, 2018 Sony Semiconductor Solutions Corporation + */ + +#ifndef CXD2880_SPI_DEVICE_H +#define CXD2880_SPI_DEVICE_H + +#include "cxd2880_spi.h" + +struct cxd2880_spi_device { + struct spi_device *spi; +}; + +int cxd2880_spi_device_initialize(struct cxd2880_spi_device *spi_device, + enum cxd2880_spi_mode mode, + u32 speedHz); + +int cxd2880_spi_device_create_spi(struct cxd2880_spi *spi, + struct cxd2880_spi_device *spi_device); + +#endif /* CXD2880_SPI_DEVICE_H */ |