media: cxd2880-spi: Add support for CXD2880 SPI interface
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@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>
This commit is contained in:
Yasunari Takiguchi
Mauro Carvalho Chehab
parent
feac8c8bb9
commit
bd24fcddf6
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@ -0,0 +1,670 @@
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// SPDX-License-Identifier: GPL-2.0
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/*
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* cxd2880-spi.c
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* Sony CXD2880 DVB-T2/T tuner + demodulator driver
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* SPI adapter
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*
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* Copyright (C) 2016, 2017, 2018 Sony Semiconductor Solutions Corporation
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__
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#include <linux/spi/spi.h>
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#include <linux/ktime.h>
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#include "dvb_demux.h"
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#include "dmxdev.h"
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#include "dvb_frontend.h"
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#include "cxd2880.h"
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#define CXD2880_MAX_FILTER_SIZE 32
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#define BURST_WRITE_MAX 128
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#define MAX_TRANS_PKT 300
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struct cxd2880_ts_buf_info {
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u8 read_ready:1;
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u8 almost_full:1;
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u8 almost_empty:1;
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u8 overflow:1;
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u8 underflow:1;
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u16 pkt_num;
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};
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struct cxd2880_pid_config {
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u8 is_enable;
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u16 pid;
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};
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struct cxd2880_pid_filter_config {
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u8 is_negative;
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struct cxd2880_pid_config pid_config[CXD2880_MAX_FILTER_SIZE];
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};
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struct cxd2880_dvb_spi {
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struct dvb_frontend dvb_fe;
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struct dvb_adapter adapter;
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struct dvb_demux demux;
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struct dmxdev dmxdev;
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struct dmx_frontend dmx_fe;
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struct task_struct *cxd2880_ts_read_thread;
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struct spi_device *spi;
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struct mutex spi_mutex; /* For SPI access exclusive control */
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int feed_count;
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int all_pid_feed_count;
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u8 *ts_buf;
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struct cxd2880_pid_filter_config filter_config;
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};
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DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
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static int cxd2880_write_spi(struct spi_device *spi, u8 *data, u32 size)
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{
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struct spi_message msg;
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struct spi_transfer tx;
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if (!spi || !data) {
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pr_err("invalid arg\n");
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return -EINVAL;
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}
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memset(&tx, 0, sizeof(tx));
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tx.tx_buf = data;
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tx.len = size;
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spi_message_init(&msg);
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spi_message_add_tail(&tx, &msg);
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return spi_sync(spi, &msg);
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}
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static int cxd2880_write_reg(struct spi_device *spi,
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u8 sub_address, const u8 *data, u32 size)
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{
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u8 send_data[BURST_WRITE_MAX + 4];
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const u8 *write_data_top = NULL;
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int ret = 0;
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if (!spi || !data) {
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pr_err("invalid arg\n");
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return -EINVAL;
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}
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if (size > BURST_WRITE_MAX) {
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pr_err("data size > WRITE_MAX\n");
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return -EINVAL;
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}
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if (sub_address + size > 0x100) {
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pr_err("out of range\n");
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return -EINVAL;
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}
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send_data[0] = 0x0e;
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write_data_top = data;
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while (size > 0) {
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send_data[1] = sub_address;
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if (size > 255)
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send_data[2] = 255;
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else
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send_data[2] = (u8)size;
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memcpy(&send_data[3], write_data_top, send_data[2]);
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ret = cxd2880_write_spi(spi, send_data, send_data[2] + 3);
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if (ret) {
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pr_err("write spi failed %d\n", ret);
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break;
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}
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sub_address += send_data[2];
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write_data_top += send_data[2];
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size -= send_data[2];
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}
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return ret;
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}
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static int cxd2880_spi_read_ts(struct spi_device *spi,
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u8 *read_data,
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u32 packet_num)
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{
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int ret;
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u8 data[3];
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struct spi_message message;
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struct spi_transfer transfer[2];
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if (!spi || !read_data || !packet_num) {
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pr_err("invalid arg\n");
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return -EINVAL;
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}
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if (packet_num > 0xffff) {
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pr_err("packet num > 0xffff\n");
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return -EINVAL;
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}
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data[0] = 0x10;
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data[1] = packet_num >> 8;
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data[2] = packet_num;
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spi_message_init(&message);
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memset(transfer, 0, sizeof(transfer));
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transfer[0].len = 3;
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transfer[0].tx_buf = data;
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spi_message_add_tail(&transfer[0], &message);
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transfer[1].len = packet_num * 188;
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transfer[1].rx_buf = read_data;
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spi_message_add_tail(&transfer[1], &message);
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ret = spi_sync(spi, &message);
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if (ret)
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pr_err("spi_write_then_read failed\n");
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return ret;
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}
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static int cxd2880_spi_read_ts_buffer_info(struct spi_device *spi,
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struct cxd2880_ts_buf_info *info)
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{
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u8 send_data = 0x20;
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u8 recv_data[2];
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int ret;
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if (!spi || !info) {
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pr_err("invalid arg\n");
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return -EINVAL;
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}
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ret = spi_write_then_read(spi, &send_data, 1,
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recv_data, sizeof(recv_data));
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if (ret)
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pr_err("spi_write_then_read failed\n");
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info->read_ready = (recv_data[0] & 0x80) ? 1 : 0;
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info->almost_full = (recv_data[0] & 0x40) ? 1 : 0;
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info->almost_empty = (recv_data[0] & 0x20) ? 1 : 0;
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info->overflow = (recv_data[0] & 0x10) ? 1 : 0;
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info->underflow = (recv_data[0] & 0x08) ? 1 : 0;
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info->pkt_num = ((recv_data[0] & 0x07) << 8) | recv_data[1];
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return ret;
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}
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static int cxd2880_spi_clear_ts_buffer(struct spi_device *spi)
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{
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u8 data = 0x03;
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int ret;
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ret = cxd2880_write_spi(spi, &data, 1);
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if (ret)
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pr_err("write spi failed\n");
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return ret;
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}
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static int cxd2880_set_pid_filter(struct spi_device *spi,
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struct cxd2880_pid_filter_config *cfg)
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{
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u8 data[65];
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int i;
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u16 pid = 0;
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int ret;
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if (!spi) {
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pr_err("invalid arg\n");
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return -EINVAL;
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}
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data[0] = 0x00;
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ret = cxd2880_write_reg(spi, 0x00, &data[0], 1);
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if (ret)
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return ret;
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if (!cfg) {
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data[0] = 0x02;
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ret = cxd2880_write_reg(spi, 0x50, &data[0], 1);
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} else {
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data[0] = cfg->is_negative ? 0x01 : 0x00;
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for (i = 0; i < CXD2880_MAX_FILTER_SIZE; i++) {
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pid = cfg->pid_config[i].pid;
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if (cfg->pid_config[i].is_enable) {
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data[1 + (i * 2)] = (pid >> 8) | 0x20;
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data[2 + (i * 2)] = pid & 0xff;
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} else {
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data[1 + (i * 2)] = 0x00;
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data[2 + (i * 2)] = 0x00;
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}
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}
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ret = cxd2880_write_reg(spi, 0x50, data, 65);
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}
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return ret;
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}
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static int cxd2880_update_pid_filter(struct cxd2880_dvb_spi *dvb_spi,
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struct cxd2880_pid_filter_config *cfg,
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bool is_all_pid_filter)
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{
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int ret;
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if (!dvb_spi || !cfg) {
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pr_err("invalid arg.\n");
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return -EINVAL;
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}
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mutex_lock(&dvb_spi->spi_mutex);
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if (is_all_pid_filter) {
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struct cxd2880_pid_filter_config tmpcfg;
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memset(&tmpcfg, 0, sizeof(tmpcfg));
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tmpcfg.is_negative = 1;
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tmpcfg.pid_config[0].is_enable = 1;
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tmpcfg.pid_config[0].pid = 0x1fff;
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ret = cxd2880_set_pid_filter(dvb_spi->spi, &tmpcfg);
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} else {
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ret = cxd2880_set_pid_filter(dvb_spi->spi, cfg);
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}
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mutex_unlock(&dvb_spi->spi_mutex);
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if (ret)
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pr_err("set_pid_filter failed\n");
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return ret;
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}
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static int cxd2880_ts_read(void *arg)
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{
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struct cxd2880_dvb_spi *dvb_spi = NULL;
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struct cxd2880_ts_buf_info info;
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ktime_t start;
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u32 i;
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int ret;
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dvb_spi = arg;
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if (!dvb_spi) {
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pr_err("invalid arg\n");
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return -EINVAL;
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}
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ret = cxd2880_spi_clear_ts_buffer(dvb_spi->spi);
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if (ret) {
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pr_err("set_clear_ts_buffer failed\n");
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return ret;
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}
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start = ktime_get();
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while (!kthread_should_stop()) {
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ret = cxd2880_spi_read_ts_buffer_info(dvb_spi->spi,
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&info);
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if (ret) {
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pr_err("spi_read_ts_buffer_info error\n");
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return ret;
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}
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if (info.pkt_num > MAX_TRANS_PKT) {
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for (i = 0; i < info.pkt_num / MAX_TRANS_PKT; i++) {
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cxd2880_spi_read_ts(dvb_spi->spi,
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dvb_spi->ts_buf,
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MAX_TRANS_PKT);
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dvb_dmx_swfilter(&dvb_spi->demux,
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dvb_spi->ts_buf,
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MAX_TRANS_PKT * 188);
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}
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start = ktime_get();
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} else if ((info.pkt_num > 0) &&
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(ktime_to_ms(ktime_sub(ktime_get(), start)) >= 500)) {
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cxd2880_spi_read_ts(dvb_spi->spi,
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dvb_spi->ts_buf,
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info.pkt_num);
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dvb_dmx_swfilter(&dvb_spi->demux,
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dvb_spi->ts_buf,
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info.pkt_num * 188);
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start = ktime_get();
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} else {
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usleep_range(10000, 11000);
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}
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}
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return 0;
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}
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static int cxd2880_start_feed(struct dvb_demux_feed *feed)
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{
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int ret = 0;
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int i = 0;
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struct dvb_demux *demux = NULL;
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struct cxd2880_dvb_spi *dvb_spi = NULL;
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if (!feed) {
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pr_err("invalid arg\n");
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return -EINVAL;
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}
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demux = feed->demux;
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if (!demux) {
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pr_err("feed->demux is NULL\n");
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return -EINVAL;
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}
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dvb_spi = demux->priv;
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if (dvb_spi->feed_count == CXD2880_MAX_FILTER_SIZE) {
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pr_err("Exceeded maximum PID count (32).");
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pr_err("Selected PID cannot be enabled.\n");
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return -EINVAL;
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}
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if (feed->pid == 0x2000) {
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if (dvb_spi->all_pid_feed_count == 0) {
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ret = cxd2880_update_pid_filter(dvb_spi,
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&dvb_spi->filter_config,
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true);
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if (ret) {
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pr_err("update pid filter failed\n");
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return ret;
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}
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}
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dvb_spi->all_pid_feed_count++;
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pr_debug("all PID feed (count = %d)\n",
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dvb_spi->all_pid_feed_count);
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} else {
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struct cxd2880_pid_filter_config cfgtmp;
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cfgtmp = dvb_spi->filter_config;
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for (i = 0; i < CXD2880_MAX_FILTER_SIZE; i++) {
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if (cfgtmp.pid_config[i].is_enable == 0) {
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cfgtmp.pid_config[i].is_enable = 1;
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cfgtmp.pid_config[i].pid = feed->pid;
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pr_debug("store PID %d to #%d\n",
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feed->pid, i);
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break;
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}
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}
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if (i == CXD2880_MAX_FILTER_SIZE) {
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pr_err("PID filter is full. Assumed bug.\n");
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return -EINVAL;
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}
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if (!dvb_spi->all_pid_feed_count)
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ret = cxd2880_update_pid_filter(dvb_spi,
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&cfgtmp,
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false);
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if (ret)
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return ret;
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dvb_spi->filter_config = cfgtmp;
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}
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if (dvb_spi->feed_count == 0) {
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dvb_spi->ts_buf =
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kmalloc(MAX_TRANS_PKT * 188,
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GFP_KERNEL | GFP_DMA);
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if (!dvb_spi->ts_buf) {
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pr_err("ts buffer allocate failed\n");
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memset(&dvb_spi->filter_config, 0,
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sizeof(dvb_spi->filter_config));
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dvb_spi->all_pid_feed_count = 0;
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return -ENOMEM;
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}
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dvb_spi->cxd2880_ts_read_thread = kthread_run(cxd2880_ts_read,
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dvb_spi,
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"cxd2880_ts_read");
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if (IS_ERR(dvb_spi->cxd2880_ts_read_thread)) {
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pr_err("kthread_run failed/\n");
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kfree(dvb_spi->ts_buf);
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dvb_spi->ts_buf = NULL;
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memset(&dvb_spi->filter_config, 0,
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sizeof(dvb_spi->filter_config));
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dvb_spi->all_pid_feed_count = 0;
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return PTR_ERR(dvb_spi->cxd2880_ts_read_thread);
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}
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}
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dvb_spi->feed_count++;
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pr_debug("start feed (count %d)\n", dvb_spi->feed_count);
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return 0;
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}
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static int cxd2880_stop_feed(struct dvb_demux_feed *feed)
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{
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int i = 0;
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int ret;
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struct dvb_demux *demux = NULL;
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struct cxd2880_dvb_spi *dvb_spi = NULL;
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if (!feed) {
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pr_err("invalid arg\n");
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return -EINVAL;
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}
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demux = feed->demux;
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if (!demux) {
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pr_err("feed->demux is NULL\n");
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return -EINVAL;
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}
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dvb_spi = demux->priv;
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if (!dvb_spi->feed_count) {
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pr_err("no feed is started\n");
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return -EINVAL;
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}
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if (feed->pid == 0x2000) {
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/*
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* Special PID case.
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* Number of 0x2000 feed request was stored
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* in dvb_spi->all_pid_feed_count.
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*/
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if (dvb_spi->all_pid_feed_count <= 0) {
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pr_err("PID %d not found.\n", feed->pid);
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return -EINVAL;
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}
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dvb_spi->all_pid_feed_count--;
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} else {
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struct cxd2880_pid_filter_config cfgtmp;
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cfgtmp = dvb_spi->filter_config;
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for (i = 0; i < CXD2880_MAX_FILTER_SIZE; i++) {
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if (feed->pid == cfgtmp.pid_config[i].pid &&
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cfgtmp.pid_config[i].is_enable != 0) {
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cfgtmp.pid_config[i].is_enable = 0;
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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");
|
||||
Loading…
Reference in New Issue