1 // SPDX-License-Identifier: GPL-2.0
4 * Sony CXD2880 DVB-T2/T tuner + demodulator driver
5 * I/O interface via SPI
7 * Copyright (C) 2016, 2017, 2018 Sony Semiconductor Solutions Corporation
10 #include "cxd2880_devio_spi.h"
12 #define BURST_WRITE_MAX 128
14 static int cxd2880_io_spi_read_reg(struct cxd2880_io *io,
15 enum cxd2880_io_tgt tgt,
16 u8 sub_address, u8 *data,
20 struct cxd2880_spi *spi = NULL;
22 u8 *read_data_top = data;
24 if (!io || !io->if_object || !data)
27 if (sub_address + size > 0x100)
32 if (tgt == CXD2880_IO_TGT_SYS)
42 send_data[1] = sub_address;
49 spi->write_read(spi, send_data, sizeof(send_data),
50 read_data_top, send_data[2]);
54 sub_address += send_data[2];
55 read_data_top += send_data[2];
62 static int cxd2880_io_spi_write_reg(struct cxd2880_io *io,
63 enum cxd2880_io_tgt tgt,
65 const u8 *data, u32 size)
68 struct cxd2880_spi *spi = NULL;
69 u8 send_data[BURST_WRITE_MAX + 4];
70 const u8 *write_data_top = data;
72 if (!io || !io->if_object || !data)
75 if (size > BURST_WRITE_MAX)
78 if (sub_address + size > 0x100)
83 if (tgt == CXD2880_IO_TGT_SYS)
89 send_data[1] = sub_address;
95 memcpy(&send_data[3], write_data_top, send_data[2]);
97 if (tgt == CXD2880_IO_TGT_SYS) {
98 send_data[3 + send_data[2]] = 0x00;
99 ret = spi->write(spi, send_data, send_data[2] + 4);
101 ret = spi->write(spi, send_data, send_data[2] + 3);
106 sub_address += send_data[2];
107 write_data_top += send_data[2];
108 size -= send_data[2];
114 int cxd2880_io_spi_create(struct cxd2880_io *io,
115 struct cxd2880_spi *spi, u8 slave_select)
120 io->read_regs = cxd2880_io_spi_read_reg;
121 io->write_regs = cxd2880_io_spi_write_reg;
122 io->write_reg = cxd2880_io_common_write_one_reg;
124 io->i2c_address_sys = 0;
125 io->i2c_address_demod = 0;
126 io->slave_select = slave_select;