130 lines
2.5 KiB
C
130 lines
2.5 KiB
C
|
// SPDX-License-Identifier: GPL-2.0
|
||
|
|
/*
|
||
|
|
* cxd2880_devio_spi.c
|
||
|
|
* Sony CXD2880 DVB-T2/T tuner + demodulator driver
|
||
|
|
* I/O interface via SPI
|
||
|
|
*
|
||
|
|
* Copyright (C) 2016, 2017, 2018 Sony Semiconductor Solutions Corporation
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "cxd2880_devio_spi.h"
|
||
|
|
|
||
|
|
#define BURST_WRITE_MAX 128
|
||
|
|
|
||
|
|
static int cxd2880_io_spi_read_reg(struct cxd2880_io *io,
|
||
|
|
enum cxd2880_io_tgt tgt,
|
||
|
|
u8 sub_address, u8 *data,
|
||
|
|
u32 size)
|
||
|
|
{
|
||
|
|
int ret = 0;
|
||
|
|
struct cxd2880_spi *spi = NULL;
|
||
|
|
u8 send_data[6];
|
||
|
|
u8 *read_data_top = data;
|
||
|
|
|
||
|
|
if (!io || !io->if_object || !data)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
if (sub_address + size > 0x100)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
spi = io->if_object;
|
||
|
|
|
||
|
|
if (tgt == CXD2880_IO_TGT_SYS)
|
||
|
|
send_data[0] = 0x0b;
|
||
|
|
else
|
||
|
|
send_data[0] = 0x0a;
|
||
|
|
|
||
|
|
send_data[3] = 0;
|
||
|
|
send_data[4] = 0;
|
||
|
|
send_data[5] = 0;
|
||
|
|
|
||
|
|
while (size > 0) {
|
||
|
|
send_data[1] = sub_address;
|
||
|
|
if (size > 255)
|
||
|
|
send_data[2] = 255;
|
||
|
|
else
|
||
|
|
send_data[2] = size;
|
||
|
|
|
||
|
|
ret =
|
||
|
|
spi->write_read(spi, send_data, sizeof(send_data),
|
||
|
|
read_data_top, send_data[2]);
|
||
|
|
if (ret)
|
||
|
|
return ret;
|
||
|
|
|
||
|
|
sub_address += send_data[2];
|
||
|
|
read_data_top += send_data[2];
|
||
|
|
size -= send_data[2];
|
||
|
|
}
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int cxd2880_io_spi_write_reg(struct cxd2880_io *io,
|
||
|
|
enum cxd2880_io_tgt tgt,
|
||
|
|
u8 sub_address,
|
||
|
|
const u8 *data, u32 size)
|
||
|
|
{
|
||
|
|
int ret = 0;
|
||
|
|
struct cxd2880_spi *spi = NULL;
|
||
|
|
u8 send_data[BURST_WRITE_MAX + 4];
|
||
|
|
const u8 *write_data_top = data;
|
||
|
|
|
||
|
|
if (!io || !io->if_object || !data)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
if (size > BURST_WRITE_MAX)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
if (sub_address + size > 0x100)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
spi = io->if_object;
|
||
|
|
|
||
|
|
if (tgt == CXD2880_IO_TGT_SYS)
|
||
|
|
send_data[0] = 0x0f;
|
||
|
|
else
|
||
|
|
send_data[0] = 0x0e;
|
||
|
|
|
||
|
|
while (size > 0) {
|
||
|
|
send_data[1] = sub_address;
|
||
|
|
if (size > 255)
|
||
|
|
send_data[2] = 255;
|
||
|
|
else
|
||
|
|
send_data[2] = size;
|
||
|
|
|
||
|
|
memcpy(&send_data[3], write_data_top, send_data[2]);
|
||
|
|
|
||
|
|
if (tgt == CXD2880_IO_TGT_SYS) {
|
||
|
|
send_data[3 + send_data[2]] = 0x00;
|
||
|
|
ret = spi->write(spi, send_data, send_data[2] + 4);
|
||
|
|
} else {
|
||
|
|
ret = spi->write(spi, send_data, send_data[2] + 3);
|
||
|
|
}
|
||
|
|
if (ret)
|
||
|
|
return ret;
|
||
|
|
|
||
|
|
sub_address += send_data[2];
|
||
|
|
write_data_top += send_data[2];
|
||
|
|
size -= send_data[2];
|
||
|
|
}
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
int cxd2880_io_spi_create(struct cxd2880_io *io,
|
||
|
|
struct cxd2880_spi *spi, u8 slave_select)
|
||
|
|
{
|
||
|
|
if (!io || !spi)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
io->read_regs = cxd2880_io_spi_read_reg;
|
||
|
|
io->write_regs = cxd2880_io_spi_write_reg;
|
||
|
|
io->write_reg = cxd2880_io_common_write_one_reg;
|
||
|
|
io->if_object = spi;
|
||
|
|
io->i2c_address_sys = 0;
|
||
|
|
io->i2c_address_demod = 0;
|
||
|
|
io->slave_select = slave_select;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|