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SubjectRE: [PATCH v5 02/12] [media] cxd2880-spi: Add support for CXD2880 SPI interface
Date
Dear Mauro

I am very glad to hear your message.

Being busy, thank you for taking care of fixing patches as well also.
And we will improve about your below comments continuously.

Regards & Thanks
Takiguchi

> -----Original Message-----
> From: Mauro Carvalho Chehab [mailto:mchehab@s-opensource.com]
> Sent: Wednesday, March 7, 2018 7:15 PM
> To: Takiguchi, Yasunari (SSS)
> Cc: linux-kernel@vger.kernel.org; devicetree@vger.kernel.org;
> linux-media@vger.kernel.org; tbird20d@gmail.com;
> frowand.list@gmail.com; Yamamoto, Masayuki (SSS); Nozawa, Hideki (STWN);
> Yonezawa, Kota (SSS); Matsumoto, Toshihiko (SSS); Watanabe, Satoshi (SSS)
> Subject: Re: [PATCH v5 02/12] [media] cxd2880-spi: Add support for CXD2880
> SPI interface
>
> Em Thu, 18 Jan 2018 17:46:10 +0900
> <Yasunari.Takiguchi@sony.com> escreveu:
>
> > From: Yasunari Takiguchi <Yasunari.Takiguchi@sony.com>
> >
> > This is the SPI adapter part of the driver for the Sony CXD2880
> > DVB-T2/T tuner + demodulator.
>
> Thanks for the patches!
>
> The patch series look ok. Just a few nitpicks that could be solved later.
>
> I had to apply a few patches to make it build and remove some warnings
> with W=1. Patches sent.
>
> With that, I'm applying this series.
>
> Regards,
> Mauro
>
> >
> > 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>
> > ---
> >
> > [Change list]
> > Changes in V5
> > Using SPDX-License-Identifier
> > drivers/media/spi/cxd2880-spi.c
> > -modified typo about "ivnalid" -> "invalid"
> > -modified typo about "drvier" -> "driver"
> > -removed unnecessary if()
> > -modified return error code
> > -reduction of valiable names
> > -removed unnecessary parentheses
> > -changed members of struct cxd2880_ts_buf_info
> >
> > 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 | 670
> > ++++++++++++++++++++++++++++++++++++++++
> > 1 file changed, 670 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..857e4c0d7a92
> > --- /dev/null
> > +++ b/drivers/media/spi/cxd2880-spi.c
> > @@ -0,0 +1,670 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +/*
> > + * cxd2880-spi.c
> > + * Sony CXD2880 DVB-T2/T tuner + demodulator driver
> > + * SPI adapter
> > + *
> > + * Copyright (C) 2016, 2017, 2018 Sony Semiconductor Solutions
> > +Corporation */
> > +
> > +#define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__
> > +
> > +#include <linux/spi/spi.h>
> > +#include <linux/ktime.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_PKT 300
> > +
> > +struct cxd2880_ts_buf_info {
> > + u8 read_ready:1;
> > + u8 almost_full:1;
> > + u8 almost_empty:1;
> > + u8 overflow:1;
> > + u8 underflow:1;
> > + u16 pkt_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;
> > +
> > + if (!spi || !data) {
> > + pr_err("invalid arg\n");
> > + return -EINVAL;
> > + }
> > +
> > + memset(&tx, 0, sizeof(tx));
>
> Nitpick:
>
> instead, you could just declare tx as:
>
> struct spi_transfer tx = {};
>
> and get rid of memset (same applies to similar code blocks).
>
>
> > + tx.tx_buf = data;
> > + tx.len = size;
> > +
> > + spi_message_init(&msg);
> > + spi_message_add_tail(&tx, &msg);
> > +
> > + return spi_sync(spi, &msg);
> > +}
> > +
> > +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;
> > + }
>
> It is better to use dev_err(spi->dev, ...) instead of pr_err().
>
>
> > +
> > + 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;
> > + data[2] = packet_num;
> > +
> > + 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->pkt_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("invalid 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);
> > + } 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);
> > + }
> > +
> > + return ret;
> > +}
> > +
> > +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;
> > + ktime_t start;
> > + 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 = ktime_get();
> > + while (!kthread_should_stop()) {
> > + 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.pkt_num > MAX_TRANS_PKT) {
> > + for (i = 0; i < info.pkt_num / MAX_TRANS_PKT; i++)
> {
> > + cxd2880_spi_read_ts(dvb_spi->spi,
> > + dvb_spi->ts_buf,
> > + MAX_TRANS_PKT);
> > + dvb_dmx_swfilter(&dvb_spi->demux,
> > + dvb_spi->ts_buf,
> > + MAX_TRANS_PKT * 188);
> > + }
> > + start = ktime_get();
> > + } else if ((info.pkt_num > 0) &&
> > + (ktime_to_ms(ktime_sub(ktime_get(), start))
> >= 500)) {
> > + cxd2880_spi_read_ts(dvb_spi->spi,
> > + dvb_spi->ts_buf,
> > + info.pkt_num);
> > + dvb_dmx_swfilter(&dvb_spi->demux,
> > + dvb_spi->ts_buf,
> > + info.pkt_num * 188);
> > + start = ktime_get();
> > + } 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 -EINVAL;
> > + }
> > +
> > + 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");
>
> "Assumed bug"? What do you mean?
>
> If the hardware filters are full, it is likely an userspace problem, not
> a Kernel bug.
>
> > + return -EINVAL;
> > + }
> > + 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_PKT * 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 + demod driver SPI
> > +adapter"); MODULE_AUTHOR("Sony Semiconductor Solutions
> Corporation");
> > +MODULE_LICENSE("GPL v2");
>
>
>
> Thanks,
> Mauro

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