From: Yasunari Takiguchi <yasunari.takigu...@sony.com> This is the driver for Sony CXD2880 DVB-T2/T tuner + demodulator. It contains the SPI adapter part of the driver.
Signed-off-by: Yasunari Takiguchi <yasunari.takigu...@sony.com> Signed-off-by: Masayuki Yamamoto <masayuki.yamam...@sony.com> Signed-off-by: Hideki Nozawa <hideki.noz...@sony.com> Signed-off-by: Kota Yonezawa <kota.yonez...@sony.com> Signed-off-by: Toshihiko Matsumoto <toshihiko.matsum...@sony.com> Signed-off-by: Satoshi Watanabe <satoshi.c.watan...@sony.com> --- drivers/media/spi/Kconfig | 14 + drivers/media/spi/Makefile | 5 + drivers/media/spi/cxd2880-spi.c | 727 +++++++++++++++++++++++++++++++++++++++ 3 files changed, 746 insertions(+) create mode 100644 drivers/media/spi/cxd2880-spi.c diff --git a/drivers/media/spi/Kconfig b/drivers/media/spi/Kconfig index a21f5a3..b07ac86 100644 --- a/drivers/media/spi/Kconfig +++ b/drivers/media/spi/Kconfig @@ -12,3 +12,17 @@ config VIDEO_GS1662 endmenu endif + +if SPI +menu "Media SPI Adapters" + +config CXD2880_SPI_DRV + tristate "Sony CXD2880 SPI support" + depends on DVB_CORE && SPI + default m if !MEDIA_SUBDRV_AUTOSELECT + help + Choose if you would like to have SPI interface support for Sony CXD2880. + +endmenu + +endif diff --git a/drivers/media/spi/Makefile b/drivers/media/spi/Makefile index ea64013..40e0f88 100644 --- a/drivers/media/spi/Makefile +++ b/drivers/media/spi/Makefile @@ -1 +1,6 @@ obj-$(CONFIG_VIDEO_GS1662) += gs1662.o +obj-$(CONFIG_CXD2880_SPI_DRV) += cxd2880-spi.o + +ccflags-y += -Idrivers/media/dvb-core +ccflags-y += -Idrivers/media/dvb-frontends +ccflags-y += -Idrivers/media/dvb-frontends/cxd2880 \ No newline at end of file diff --git a/drivers/media/spi/cxd2880-spi.c b/drivers/media/spi/cxd2880-spi.c new file mode 100644 index 0000000..7ba0ed8 --- /dev/null +++ b/drivers/media/spi/cxd2880-spi.c @@ -0,0 +1,727 @@ +/* + * cxd2880-spi.c + * Sony CXD2880 DVB-T2/T tuner + demodulator driver + * SPI adapter + * + * 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 "dvb_demux.h" +#include "dmxdev.h" +#include "dvb_frontend.h" +#include "cxd2880.h" + +#define CXD2880_MAX_FILTER_SIZE 32 +#define BURST_WRITE_MAX 128 +#define MAX_TRANS_PACKET 300 + +struct cxd2880_ts_buf_info { + u8 read_ready; + u8 almost_full; + u8 almost_empty; + u8 overflow; + u8 underflow; + u16 packet_num; +}; + +struct cxd2880_pid_config { + u8 is_enable; + u16 pid; +}; + +struct cxd2880_pid_filter_config { + u8 is_negative; + struct cxd2880_pid_config pid_config[CXD2880_MAX_FILTER_SIZE]; +}; + +struct cxd2880_dvb_spi { + struct dvb_frontend dvb_fe; + struct dvb_adapter adapter; + struct dvb_demux demux; + struct dmxdev dmxdev; + struct dmx_frontend dmx_fe; + struct task_struct *cxd2880_ts_read_thread; + struct spi_device *spi; + struct mutex spi_mutex; /* For SPI access exclusive control */ + int feed_count; + int all_pid_feed_count; + u8 *ts_buf; + struct cxd2880_pid_filter_config filter_config; +}; + +DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr); + +static int cxd2880_write_spi(struct spi_device *spi, u8 *data, u32 size) +{ + struct spi_message msg; + struct spi_transfer tx; + int ret = 0; + + if ((!spi) || (!data)) { + pr_err("%s: invalid arg\n", __func__); + return -EINVAL; + } + + memset(&tx, 0, sizeof(tx)); + tx.tx_buf = data; + tx.len = size; + + spi_message_init(&msg); + spi_message_add_tail(&tx, &msg); + ret = spi_sync(spi, &msg); + + return ret; +} + +static int cxd2880_write_reg(struct spi_device *spi, + u8 subAddress, const u8 *data, u32 size) +{ + u8 send_data[BURST_WRITE_MAX + 4]; + const u8 *write_data_top = NULL; + int ret = 0; + + if ((!spi) || (!data)) { + pr_err("%s: invalid arg\n", __func__); + return -EINVAL; + } + if (size > BURST_WRITE_MAX) { + pr_err("%s: data size > WRITE_MAX\n", __func__); + return -EINVAL; + } + + if (subAddress + size > 0x100) { + pr_err("%s: out of range\n", __func__); + return -EINVAL; + } + + send_data[0] = 0x0E; + write_data_top = data; + + while (size > 0) { + send_data[1] = subAddress; + if (size > 255) + send_data[2] = 255; + else + send_data[2] = (u8)size; + + memcpy(&send_data[3], write_data_top, send_data[2]); + + ret = cxd2880_write_spi(spi, send_data, send_data[2] + 3); + if (ret) { + dev_err(&spi->dev, "%s: write spi failed %d\n", + __func__, ret); + break; + } + subAddress += send_data[2]; + write_data_top += send_data[2]; + size -= send_data[2]; + } + + return ret; +} + +static int cxd2880_spi_read_ts(struct spi_device *spi, + u8 *read_data, + u32 packet_num) +{ + int ret = 0; + u8 data[3]; + struct spi_message message; + struct spi_transfer transfer[2]; + + if ((!spi) || (!read_data) || (!packet_num)) { + pr_err("%s: invalid arg\n", __func__); + return -EINVAL; + } + if (packet_num > 0xFFFF) { + dev_err(&spi->dev, "%s: packet num > 0xFFFF\n", __func__); + return -EINVAL; + } + + data[0] = 0x10; + data[1] = (u8)((packet_num >> 8) & 0xFF); + data[2] = (u8)(packet_num & 0xFF); + + spi_message_init(&message); + memset(transfer, 0, sizeof(transfer)); + + transfer[0].len = 3; + transfer[0].tx_buf = data; + spi_message_add_tail(&transfer[0], &message); + transfer[1].len = packet_num * 188; + transfer[1].rx_buf = read_data; + spi_message_add_tail(&transfer[1], &message); + + ret = spi_sync(spi, &message); + if (ret) + dev_err(&spi->dev, "%s: spi_write_then_read failed\n", + __func__); + + return ret; +} + +static int cxd2880_spi_read_ts_buffer_info(struct spi_device *spi, + struct cxd2880_ts_buf_info *info) +{ + u8 send_data = 0x20; + u8 recv_data[2]; + int ret = 0; + + if ((!spi) || (!info)) { + pr_err("%s: invalid arg\n", __func__); + return -EINVAL; + } + + ret = spi_write_then_read(spi, &send_data, 1, + recv_data, sizeof(recv_data)); + if (ret) + dev_err(&spi->dev, + "%s: spi_write_then_read failed\n", __func__); + + info->read_ready = (u8)((recv_data[0] & 0x80) ? 1 : 0); + info->almost_full = (u8)((recv_data[0] & 0x40) ? 1 : 0); + info->almost_empty = (u8)((recv_data[0] & 0x20) ? 1 : 0); + info->overflow = (u8)((recv_data[0] & 0x10) ? 1 : 0); + info->underflow = (u8)((recv_data[0] & 0x08) ? 1 : 0); + info->packet_num = (u16)(((recv_data[0] & 0x07) << 8) | recv_data[1]); + + return ret; +} + +static int cxd2880_spi_clear_ts_buffer(struct spi_device *spi) +{ + u8 data = 0x03; + int ret = 0; + + ret = cxd2880_write_spi(spi, &data, 1); + + if (ret) + pr_err("%s: write spi failed\n", __func__); + + return ret; +} + +static int cxd2880_set_pid_filter(struct spi_device *spi, + struct cxd2880_pid_filter_config *cfg) +{ + u8 data[65]; + + if (!spi) { + pr_err("%s: ivnalid arg\n", __func__); + return -EINVAL; + } + + data[0] = 0x00; + if (cxd2880_write_reg(spi, 0x00, &data[0], 1) != 0) + return -EIO; + if (!cfg) { + data[0] = 0x02; + if (cxd2880_write_reg(spi, 0x50, &data[0], 1) != 0) + return -EIO; + } else { + data[0] = (u8)(cfg->is_negative ? 0x01 : 0x00); + { + int i = 0; + u16 pid = 0; + + for (i = 0; i < CXD2880_MAX_FILTER_SIZE; i++) { + pid = cfg->pid_config[i].pid; + if (cfg->pid_config[i].is_enable) { + data[1 + (i * 2)] = + (u8)((u8)(pid >> 8) | 0x20); + data[2 + (i * 2)] = + (u8)(pid & 0xFF); + } else { + data[1 + (i * 2)] = 0x00; + data[2 + (i * 2)] = 0x00; + } + } + } + if (cxd2880_write_reg(spi, 0x50, data, 65) != 0) + return -EIO; + } + + return 0; +} + +static int cxd2880_update_pid_filter(struct cxd2880_dvb_spi *dvb_spi, + struct cxd2880_pid_filter_config *cfg, + bool is_all_pid_filter) +{ + int ret = 0; + + if ((!dvb_spi) || (!cfg)) { + pr_err("%s: invalid arg.\n", __func__); + return -EINVAL; + } + + mutex_lock(&dvb_spi->spi_mutex); + if (is_all_pid_filter) { + struct cxd2880_pid_filter_config tmpcfg; + + memset(&tmpcfg, 0, sizeof(tmpcfg)); + tmpcfg.is_negative = 1; + tmpcfg.pid_config[0].is_enable = 1; + tmpcfg.pid_config[0].pid = 0x1FFF; + + ret = cxd2880_set_pid_filter(dvb_spi->spi, &tmpcfg); + } else { + ret = cxd2880_set_pid_filter(dvb_spi->spi, cfg); + } + mutex_unlock(&dvb_spi->spi_mutex); + + if (ret) { + dev_err(&dvb_spi->spi->dev, + "%s: set_pid_filter failed\n", __func__); + } + + return ret; +} + +static int cxd2880_ts_read(void *arg) +{ + struct cxd2880_dvb_spi *dvb_spi = NULL; + struct cxd2880_ts_buf_info info; + struct timespec ts; + long elapsed = 0; + long starttime = 0; + u32 i; + int ret; + + dvb_spi = (struct cxd2880_dvb_spi *)arg; + if (!dvb_spi) { + pr_err("%s: invalid arg\n", __func__); + return -EINVAL; + } + + ret = cxd2880_spi_clear_ts_buffer(dvb_spi->spi); + if (ret) { + dev_err(&dvb_spi->spi->dev, + "%s: set_clear_ts_buffer failed\n", __func__); + return ret; + } + + getnstimeofday(&ts); + starttime = (ts.tv_sec * 1000) + (ts.tv_nsec / 1000000); + while (!kthread_should_stop()) { + getnstimeofday(&ts); + elapsed = + ((ts.tv_sec * 1000) + (ts.tv_nsec / 1000000)) + - starttime; + ret = cxd2880_spi_read_ts_buffer_info(dvb_spi->spi, + &info); + if (ret) { + pr_err("%s: spi_read_ts_buffer_info error\n", + __func__); + return ret; + } + + if (info.packet_num > MAX_TRANS_PACKET) { + for (i = 0; i < info.packet_num / MAX_TRANS_PACKET; + i++) { + cxd2880_spi_read_ts(dvb_spi->spi, + dvb_spi->ts_buf, + MAX_TRANS_PACKET); + dvb_dmx_swfilter(&dvb_spi->demux, + dvb_spi->ts_buf, + MAX_TRANS_PACKET * 188); + } + starttime = (ts.tv_sec * 1000) + (ts.tv_nsec / 1000000); + } else if ((info.packet_num > 0) && (elapsed >= 500)) { + cxd2880_spi_read_ts(dvb_spi->spi, + dvb_spi->ts_buf, + info.packet_num); + dvb_dmx_swfilter(&dvb_spi->demux, + dvb_spi->ts_buf, + info.packet_num * 188); + starttime = (ts.tv_sec * 1000) + (ts.tv_nsec / 1000000); + } else { + usleep_range(10000, 11000); + } + } + + return 0; +} + +static int cxd2880_start_feed(struct dvb_demux_feed *feed) +{ + int ret = 0; + int i = 0; + struct dvb_demux *demux = NULL; + struct cxd2880_dvb_spi *dvb_spi = NULL; + + if (!feed) { + pr_err("%s: invalid arg\n", __func__); + return -EINVAL; + } + + demux = feed->demux; + if (!demux) { + pr_err("%s: feed->demux is NULL\n", __func__); + return -EINVAL; + } + dvb_spi = (struct cxd2880_dvb_spi *)demux->priv; + + if (dvb_spi->feed_count == CXD2880_MAX_FILTER_SIZE) { + dev_err(&dvb_spi->spi->dev, + "%s: Exceeded maximum PID count (32).", __func__); + dev_err(&dvb_spi->spi->dev, + "Selected PID cannot be enabled.\n"); + return -EBUSY; + } + + if (feed->pid == 0x2000) { + if (dvb_spi->all_pid_feed_count == 0) { + ret = cxd2880_update_pid_filter(dvb_spi, + &dvb_spi->filter_config, + true); + if (ret) { + dev_err(&dvb_spi->spi->dev, + "%s: update pid filter failed\n", + __func__); + return ret; + } + } + dvb_spi->all_pid_feed_count++; + + dev_dbg(&dvb_spi->spi->dev, + "%s: all PID feed (count = %d)\n", + __func__, dvb_spi->all_pid_feed_count); + } else { + struct cxd2880_pid_filter_config cfgtmp; + + cfgtmp = dvb_spi->filter_config; + + for (i = 0; i < CXD2880_MAX_FILTER_SIZE; i++) { + if (cfgtmp.pid_config[i].is_enable == 0) { + cfgtmp.pid_config[i].is_enable = 1; + cfgtmp.pid_config[i].pid = feed->pid; + dev_dbg(&dvb_spi->spi->dev, + "%s: store PID %d to #%d\n", + __func__, feed->pid, i); + break; + } + } + if (i == CXD2880_MAX_FILTER_SIZE) { + dev_err(&dvb_spi->spi->dev, + "%s: PID filter is full. Assumed bug.\n", + __func__); + return -EBUSY; + } + if (!dvb_spi->all_pid_feed_count) + ret = cxd2880_update_pid_filter(dvb_spi, + &cfgtmp, + false); + if (ret) + return ret; + + dvb_spi->filter_config = cfgtmp; + } + + if (dvb_spi->feed_count == 0) { + dvb_spi->ts_buf = + kmalloc(sizeof(u8) * MAX_TRANS_PACKET * 188, + GFP_KERNEL | GFP_DMA); + if (!dvb_spi->ts_buf) { + dev_err(&dvb_spi->spi->dev, + "%s: ts buffer allocate failed\n", __func__); + memset(&dvb_spi->filter_config, 0, + sizeof(dvb_spi->filter_config)); + dvb_spi->all_pid_feed_count = 0; + return -ENOMEM; + } + dvb_spi->cxd2880_ts_read_thread = kthread_run(cxd2880_ts_read, + dvb_spi, + "cxd2880_ts_read"); + if (IS_ERR(dvb_spi->cxd2880_ts_read_thread)) { + dev_err(&dvb_spi->spi->dev, + "%s: kthread_run failed/\n", + __func__); + kfree(dvb_spi->ts_buf); + dvb_spi->ts_buf = NULL; + memset(&dvb_spi->filter_config, 0, + sizeof(dvb_spi->filter_config)); + dvb_spi->all_pid_feed_count = 0; + return PTR_ERR(dvb_spi->cxd2880_ts_read_thread); + } + } + + dvb_spi->feed_count++; + + dev_dbg(&dvb_spi->spi->dev, "%s: start feed (count %d)\n", + __func__, dvb_spi->feed_count); + return 0; +} + +static int cxd2880_stop_feed(struct dvb_demux_feed *feed) +{ + int i = 0; + int ret = 0; + struct dvb_demux *demux = NULL; + struct cxd2880_dvb_spi *dvb_spi = NULL; + + if (!feed) { + pr_err("%s: invalid arg\n", __func__); + return -EINVAL; + } + + demux = feed->demux; + if (!demux) { + pr_err("%s: feed->demux is NULL\n", __func__); + return -EINVAL; + } + dvb_spi = (struct cxd2880_dvb_spi *)demux->priv; + + if (!dvb_spi->feed_count) { + dev_warn(&dvb_spi->spi->dev, + "%s: no feed is started\n", __func__); + return -EINVAL; + } + + if (feed->pid == 0x2000) { + /* + * Special PID case. + * Number of 0x2000 feed request was stored + * in dvb_spi->all_pid_feed_count. + */ + if (dvb_spi->all_pid_feed_count <= 0) { + dev_warn(&dvb_spi->spi->dev, + "%s: PID %d not found.\n", + __func__, feed->pid); + return -EINVAL; + } + dvb_spi->all_pid_feed_count--; + } else { + struct cxd2880_pid_filter_config cfgtmp; + + cfgtmp = dvb_spi->filter_config; + + for (i = 0; i < CXD2880_MAX_FILTER_SIZE; i++) { + if (feed->pid == cfgtmp.pid_config[i].pid) { + cfgtmp.pid_config[i].is_enable = 0; + cfgtmp.pid_config[i].pid = 0; + dev_dbg(&dvb_spi->spi->dev, + "%s: removed PID %d from #%d\n", + __func__, feed->pid, i); + break; + } + } + dvb_spi->filter_config = cfgtmp; + + if (i == CXD2880_MAX_FILTER_SIZE) { + dev_warn(&dvb_spi->spi->dev, "%s: PID %d not found\n", + __func__, feed->pid); + return -EINVAL; + } + } + + ret = cxd2880_update_pid_filter(dvb_spi, + &dvb_spi->filter_config, + dvb_spi->all_pid_feed_count > 0); + dvb_spi->feed_count--; + + if (dvb_spi->feed_count == 0) { + int ret_stop = 0; + + ret_stop = kthread_stop(dvb_spi->cxd2880_ts_read_thread); + if (ret_stop) { + dev_err(&dvb_spi->spi->dev, + "%s: cxd2880_ts_read thread didn't terminate normally\n", + __func__); + ret = ret_stop; + } + kfree(dvb_spi->ts_buf); + dvb_spi->ts_buf = NULL; + } + + dev_dbg(&dvb_spi->spi->dev, "%s: stop feed ok.(count %d)\n", + __func__, dvb_spi->feed_count); + + return ret; +} + +static const struct of_device_id cxd2880_spi_of_match[] = { + { .compatible = "sony,cxd2880" }, + { /* sentinel */ } +}; + +MODULE_DEVICE_TABLE(of, cxd2880_spi_of_match); + +static int +cxd2880_spi_probe(struct spi_device *spi) +{ + int ret = 0; + struct cxd2880_dvb_spi *dvb_spi = NULL; + struct cxd2880_config config; + + if (!spi) { + pr_err("%s: invalid arg.\n", __func__); + return -EINVAL; + } + + dvb_spi = kzalloc(sizeof(struct cxd2880_dvb_spi), GFP_KERNEL); + if (!dvb_spi) + return -ENOMEM; + + dvb_spi->spi = spi; + mutex_init(&dvb_spi->spi_mutex); + dev_set_drvdata(&spi->dev, dvb_spi); + config.spi = spi; + config.spi_mutex = &dvb_spi->spi_mutex; + + ret = dvb_register_adapter(&dvb_spi->adapter, + "CXD2880", + THIS_MODULE, + &spi->dev, + adapter_nr); + if (ret < 0) { + dev_err(&spi->dev, "%s: dvb_register_adapter() failed\n", + __func__); + goto fail_adapter; + } + + if (!dvb_attach(cxd2880_attach, &dvb_spi->dvb_fe, &config)) { + dev_err(&spi->dev, "%s: cxd2880_attach failed\n", __func__); + goto fail_attach; + } + + ret = dvb_register_frontend(&dvb_spi->adapter, + &dvb_spi->dvb_fe); + if (ret < 0) { + dev_err(&spi->dev, "%s: dvb_register_frontend() failed\n", + __func__); + goto fail_frontend; + } + + dvb_spi->demux.dmx.capabilities = DMX_TS_FILTERING; + dvb_spi->demux.priv = dvb_spi; + dvb_spi->demux.filternum = CXD2880_MAX_FILTER_SIZE; + dvb_spi->demux.feednum = CXD2880_MAX_FILTER_SIZE; + dvb_spi->demux.start_feed = cxd2880_start_feed; + dvb_spi->demux.stop_feed = cxd2880_stop_feed; + + ret = dvb_dmx_init(&dvb_spi->demux); + if (ret < 0) { + dev_err(&spi->dev, "%s: dvb_dmx_init() failed\n", __func__); + goto fail_dmx; + } + + dvb_spi->dmxdev.filternum = CXD2880_MAX_FILTER_SIZE; + dvb_spi->dmxdev.demux = &dvb_spi->demux.dmx; + dvb_spi->dmxdev.capabilities = 0; + ret = dvb_dmxdev_init(&dvb_spi->dmxdev, + &dvb_spi->adapter); + if (ret < 0) { + dev_err(&spi->dev, "%s: dvb_dmxdev_init() failed\n", __func__); + goto fail_dmxdev; + } + + dvb_spi->dmx_fe.source = DMX_FRONTEND_0; + ret = dvb_spi->demux.dmx.add_frontend(&dvb_spi->demux.dmx, + &dvb_spi->dmx_fe); + if (ret < 0) { + dev_err(&spi->dev, "%s: add_frontend() failed\n", __func__); + goto fail_dmx_fe; + } + + ret = dvb_spi->demux.dmx.connect_frontend(&dvb_spi->demux.dmx, + &dvb_spi->dmx_fe); + if (ret < 0) { + dev_err(&spi->dev, "%s: dvb_register_frontend() failed\n", + __func__); + goto fail_fe_conn; + } + + dev_info(&spi->dev, "Sony CXD2880 has successfully attached.\n"); + + return 0; + +fail_fe_conn: + dvb_spi->demux.dmx.remove_frontend(&dvb_spi->demux.dmx, + &dvb_spi->dmx_fe); +fail_dmx_fe: + dvb_dmxdev_release(&dvb_spi->dmxdev); +fail_dmxdev: + dvb_dmx_release(&dvb_spi->demux); +fail_dmx: + dvb_unregister_frontend(&dvb_spi->dvb_fe); +fail_frontend: + dvb_frontend_detach(&dvb_spi->dvb_fe); +fail_attach: + dvb_unregister_adapter(&dvb_spi->adapter); +fail_adapter: + kfree(dvb_spi); + return ret; +} + +static int +cxd2880_spi_remove(struct spi_device *spi) +{ + struct cxd2880_dvb_spi *dvb_spi; + + if (!spi) { + pr_err("%s: invalid arg\n", __func__); + return -EINVAL; + } + + dvb_spi = (struct cxd2880_dvb_spi *)dev_get_drvdata(&spi->dev); + + if (!dvb_spi) { + pr_err("%s: failed\n", __func__); + return -EINVAL; + } + dvb_spi->demux.dmx.remove_frontend(&dvb_spi->demux.dmx, + &dvb_spi->dmx_fe); + dvb_dmxdev_release(&dvb_spi->dmxdev); + dvb_dmx_release(&dvb_spi->demux); + dvb_unregister_frontend(&dvb_spi->dvb_fe); + dvb_frontend_detach(&dvb_spi->dvb_fe); + dvb_unregister_adapter(&dvb_spi->adapter); + + kfree(dvb_spi); + dev_info(&spi->dev, "%s: cxd2880_spi remove ok.\n", __func__); + + return 0; +} + +static const struct spi_device_id cxd2880_spi_id[] = { + { "cxd2880", 0 }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(spi, cxd2880_spi_id); + +static struct spi_driver cxd2880_spi_driver = { + .driver = { + .name = "cxd2880", + .of_match_table = cxd2880_spi_of_match, + }, + .id_table = cxd2880_spi_id, + .probe = cxd2880_spi_probe, + .remove = cxd2880_spi_remove, +}; +module_spi_driver(cxd2880_spi_driver); + +MODULE_DESCRIPTION( +"Sony CXD2880 DVB-T2/T tuner + demodulator drvier SPI adapter"); +MODULE_AUTHOR("Sony Semiconductor Solutions Corporation"); +MODULE_LICENSE("GPL v2"); -- 1.7.9.5
