[PATCH v4 02/12] [media] cxd2880-spi: Add support for CXD2880 SPI interface
From: Yasunari.Takiguchi
Date: Fri Oct 13 2017 - 01:56:17 EST
From: Yasunari Takiguchi <Yasunari.Takiguchi@xxxxxxxx>
This is the SPI adapter part of the driver 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>
---
[Change list]
Changes in V4
drivers/media/spi/cxd2880-spi.c
-removed Camel case
-removed unnecessary initialization at variable declaration
-removed unnecessary brace {}
Changes in V3
drivers/media/spi/cxd2880-spi.c
-adjusted of indent spaces
-removed unnecessary cast
-changed debugging code
-changed timeout method
-modified coding style of if()
-changed hexadecimal code to lower case.
Changes in V2
drivers/media/spi/cxd2880-spi.c
-Modified PID filter setting.
drivers/media/spi/cxd2880-spi.c | 695 ++++++++++++++++++++++++++++++++++++++++
1 file changed, 695 insertions(+)
create mode 100644 drivers/media/spi/cxd2880-spi.c
diff --git a/drivers/media/spi/cxd2880-spi.c b/drivers/media/spi/cxd2880-spi.c
new file mode 100644
index 000000000000..387cb32f90b8
--- /dev/null
+++ b/drivers/media/spi/cxd2880-spi.c
@@ -0,0 +1,695 @@
+/*
+ * 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/>.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__
+
+#include <linux/spi/spi.h>
+#include <linux/jiffies.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;
+
+ if ((!spi) || (!data)) {
+ pr_err("invalid arg\n");
+ 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 sub_address, 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("invalid arg\n");
+ return -EINVAL;
+ }
+ if (size > BURST_WRITE_MAX) {
+ pr_err("data size > WRITE_MAX\n");
+ return -EINVAL;
+ }
+
+ if (sub_address + size > 0x100) {
+ pr_err("out of range\n");
+ return -EINVAL;
+ }
+
+ send_data[0] = 0x0e;
+ write_data_top = data;
+
+ while (size > 0) {
+ send_data[1] = sub_address;
+ 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) {
+ pr_err("write spi failed %d\n", ret);
+ break;
+ }
+ sub_address += 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;
+ u8 data[3];
+ struct spi_message message;
+ struct spi_transfer transfer[2];
+
+ if ((!spi) || (!read_data) || (!packet_num)) {
+ pr_err("invalid arg\n");
+ return -EINVAL;
+ }
+ if (packet_num > 0xffff) {
+ pr_err("packet num > 0xffff\n");
+ return -EINVAL;
+ }
+
+ data[0] = 0x10;
+ data[1] = (packet_num >> 8) & 0xff;
+ data[2] = 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)
+ pr_err("spi_write_then_read failed\n");
+
+ 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;
+
+ if ((!spi) || (!info)) {
+ pr_err("invalid arg\n");
+ return -EINVAL;
+ }
+
+ ret = spi_write_then_read(spi, &send_data, 1,
+ recv_data, sizeof(recv_data));
+ if (ret)
+ pr_err("spi_write_then_read failed\n");
+
+ info->read_ready = (recv_data[0] & 0x80) ? 1 : 0;
+ info->almost_full = (recv_data[0] & 0x40) ? 1 : 0;
+ info->almost_empty = (recv_data[0] & 0x20) ? 1 : 0;
+ info->overflow = (recv_data[0] & 0x10) ? 1 : 0;
+ info->underflow = (recv_data[0] & 0x08) ? 1 : 0;
+ info->packet_num = ((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;
+
+ ret = cxd2880_write_spi(spi, &data, 1);
+
+ if (ret)
+ pr_err("write spi failed\n");
+
+ return ret;
+}
+
+static int cxd2880_set_pid_filter(struct spi_device *spi,
+ struct cxd2880_pid_filter_config *cfg)
+{
+ u8 data[65];
+ int i;
+ u16 pid = 0;
+ int ret;
+
+ if (!spi) {
+ pr_err("ivnalid arg\n");
+ return -EINVAL;
+ }
+
+ data[0] = 0x00;
+ ret = cxd2880_write_reg(spi, 0x00, &data[0], 1);
+ if (ret)
+ return ret;
+ if (!cfg) {
+ data[0] = 0x02;
+ ret = cxd2880_write_reg(spi, 0x50, &data[0], 1);
+ if (ret)
+ return ret;
+ } else {
+ data[0] = cfg->is_negative ? 0x01 : 0x00;
+
+ 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)] = (pid >> 8) | 0x20;
+ data[2 + (i * 2)] = pid & 0xff;
+ } else {
+ data[1 + (i * 2)] = 0x00;
+ data[2 + (i * 2)] = 0x00;
+ }
+ }
+ ret = cxd2880_write_reg(spi, 0x50, data, 65);
+ if (ret)
+ return ret;
+ }
+
+ 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;
+
+ if ((!dvb_spi) || (!cfg)) {
+ pr_err("invalid arg.\n");
+ 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)
+ pr_err("set_pid_filter failed\n");
+
+ return ret;
+}
+
+static int cxd2880_ts_read(void *arg)
+{
+ struct cxd2880_dvb_spi *dvb_spi = NULL;
+ struct cxd2880_ts_buf_info info;
+ unsigned int elapsed = 0;
+ unsigned long start_time = 0;
+ u32 i;
+ int ret;
+
+ dvb_spi = arg;
+ if (!dvb_spi) {
+ pr_err("invalid arg\n");
+ return -EINVAL;
+ }
+
+ ret = cxd2880_spi_clear_ts_buffer(dvb_spi->spi);
+ if (ret) {
+ pr_err("set_clear_ts_buffer failed\n");
+ return ret;
+ }
+ start_time = jiffies;
+ while (!kthread_should_stop()) {
+ elapsed = jiffies_to_msecs(jiffies - start_time);
+ ret = cxd2880_spi_read_ts_buffer_info(dvb_spi->spi,
+ &info);
+ if (ret) {
+ pr_err("spi_read_ts_buffer_info error\n");
+ 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);
+ }
+ start_time = jiffies;
+ } 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);
+ start_time = jiffies;
+ } 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("invalid arg\n");
+ return -EINVAL;
+ }
+
+ demux = feed->demux;
+ if (!demux) {
+ pr_err("feed->demux is NULL\n");
+ return -EINVAL;
+ }
+ dvb_spi = demux->priv;
+
+ if (dvb_spi->feed_count == CXD2880_MAX_FILTER_SIZE) {
+ pr_err("Exceeded maximum PID count (32).");
+ pr_err("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) {
+ pr_err("update pid filter failed\n");
+ return ret;
+ }
+ }
+ dvb_spi->all_pid_feed_count++;
+
+ pr_debug("all PID feed (count = %d)\n",
+ 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;
+ pr_debug("store PID %d to #%d\n",
+ feed->pid, i);
+ break;
+ }
+ }
+ if (i == CXD2880_MAX_FILTER_SIZE) {
+ pr_err("PID filter is full. Assumed bug.\n");
+ 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(MAX_TRANS_PACKET * 188,
+ GFP_KERNEL | GFP_DMA);
+ if (!dvb_spi->ts_buf) {
+ pr_err("ts buffer allocate failed\n");
+ 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)) {
+ pr_err("kthread_run failed/\n");
+ 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++;
+
+ pr_debug("start feed (count %d)\n", dvb_spi->feed_count);
+ return 0;
+}
+
+static int cxd2880_stop_feed(struct dvb_demux_feed *feed)
+{
+ int i = 0;
+ int ret;
+ struct dvb_demux *demux = NULL;
+ struct cxd2880_dvb_spi *dvb_spi = NULL;
+
+ if (!feed) {
+ pr_err("invalid arg\n");
+ return -EINVAL;
+ }
+
+ demux = feed->demux;
+ if (!demux) {
+ pr_err("feed->demux is NULL\n");
+ return -EINVAL;
+ }
+ dvb_spi = demux->priv;
+
+ if (!dvb_spi->feed_count) {
+ pr_err("no feed is started\n");
+ 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) {
+ pr_err("PID %d not found.\n", 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].is_enable = 0;
+ cfgtmp.pid_config[i].pid = 0;
+ pr_debug("removed PID %d from #%d\n",
+ feed->pid, i);
+ break;
+ }
+ }
+ dvb_spi->filter_config = cfgtmp;
+
+ if (i == CXD2880_MAX_FILTER_SIZE) {
+ pr_err("PID %d not found\n", 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) {
+ pr_err("'kthread_stop failed. (%d)\n", ret_stop);
+ ret = ret_stop;
+ }
+ kfree(dvb_spi->ts_buf);
+ dvb_spi->ts_buf = NULL;
+ }
+
+ pr_debug("stop feed ok.(count %d)\n", 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;
+ struct cxd2880_dvb_spi *dvb_spi = NULL;
+ struct cxd2880_config config;
+
+ if (!spi) {
+ pr_err("invalid arg.\n");
+ 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) {
+ pr_err("dvb_register_adapter() failed\n");
+ goto fail_adapter;
+ }
+
+ if (!dvb_attach(cxd2880_attach, &dvb_spi->dvb_fe, &config)) {
+ pr_err("cxd2880_attach failed\n");
+ goto fail_attach;
+ }
+
+ ret = dvb_register_frontend(&dvb_spi->adapter,
+ &dvb_spi->dvb_fe);
+ if (ret < 0) {
+ pr_err("dvb_register_frontend() failed\n");
+ 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) {
+ pr_err("dvb_dmx_init() failed\n");
+ 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) {
+ pr_err("dvb_dmxdev_init() failed\n");
+ 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) {
+ pr_err("add_frontend() failed\n");
+ goto fail_dmx_fe;
+ }
+
+ ret = dvb_spi->demux.dmx.connect_frontend(&dvb_spi->demux.dmx,
+ &dvb_spi->dmx_fe);
+ if (ret < 0) {
+ pr_err("dvb_register_frontend() failed\n");
+ goto fail_fe_conn;
+ }
+
+ pr_info("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("invalid arg\n");
+ return -EINVAL;
+ }
+
+ dvb_spi = dev_get_drvdata(&spi->dev);
+
+ if (!dvb_spi) {
+ pr_err("failed\n");
+ 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);
+ pr_info("cxd2880_spi remove ok.\n");
+
+ 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");
--
2.13.0