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|
// 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/regulator/consumer.h>
#include <linux/ktime.h>
#include <media/dvb_demux.h>
#include <media/dmxdev.h>
#include <media/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;
struct regulator *vcc_supply;
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;
}
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 || size > U8_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;
send_data[1] = sub_address;
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);
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);
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
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