// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
// Copyright(c) 2015-18 Intel Corporation.
/*
* stream.c - SoundWire Bus stream operations.
*/
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/slab.h>
#include <linux/soundwire/sdw_registers.h>
#include <linux/soundwire/sdw.h>
#include "bus.h"
static int _sdw_program_slave_port_params(struct sdw_bus *bus,
struct sdw_slave *slave,
struct sdw_transport_params *t_params,
enum sdw_dpn_type type)
{
u32 addr1, addr2, addr3, addr4;
int ret;
u16 wbuf;
if (bus->params.next_bank) {
addr1 = SDW_DPN_OFFSETCTRL2_B1(t_params->port_num);
addr2 = SDW_DPN_BLOCKCTRL3_B1(t_params->port_num);
addr3 = SDW_DPN_SAMPLECTRL2_B1(t_params->port_num);
addr4 = SDW_DPN_HCTRL_B1(t_params->port_num);
} else {
addr1 = SDW_DPN_OFFSETCTRL2_B0(t_params->port_num);
addr2 = SDW_DPN_BLOCKCTRL3_B0(t_params->port_num);
addr3 = SDW_DPN_SAMPLECTRL2_B0(t_params->port_num);
addr4 = SDW_DPN_HCTRL_B0(t_params->port_num);
}
/* Program DPN_OffsetCtrl2 registers */
ret = sdw_write(slave, addr1, t_params->offset2);
if (ret < 0) {
dev_err(bus->dev, "DPN_OffsetCtrl2 register write failed");
return ret;
}
/* Program DPN_BlockCtrl3 register */
ret = sdw_write(slave, addr2, t_params->blk_pkg_mode);
if (ret < 0) {
dev_err(bus->dev, "DPN_BlockCtrl3 register write failed");
return ret;
}
/*
* Data ports are FULL, SIMPLE and REDUCED. This function handles
* FULL and REDUCED only and and beyond this point only FULL is
* handled, so bail out if we are not FULL data port type
*/
if (type != SDW_DPN_FULL)
return ret;
/* Program DPN_SampleCtrl2 register */
wbuf = (t_params->sample_interval - 1);
wbuf &= SDW_DPN_SAMPLECTRL_HIGH;
wbuf >>= SDW_REG_SHIFT(SDW_DPN_SAMPLECTRL_HIGH);
ret = sdw_write(slave, addr3, wbuf);
if (ret < 0) {
dev_err(bus->dev, "DPN_SampleCtrl2 register write failed");
return ret;
}
/* Program DPN_HCtrl register */
wbuf = t_params->hstart;
wbuf <<= SDW_REG_SHIFT(SDW_DPN_HCTRL_HSTART);
wbuf |= t_params->hstop;
ret = sdw_write(slave, addr4, wbuf);
if (ret < 0)
dev_err(bus->dev, "DPN_HCtrl register write failed");
return ret;
}
static int sdw_program_slave_port_params(struct sdw_bus *bus,
struct sdw_slave_runtime *s_rt,
struct sdw_port_runtime *p_rt)
{
struct sdw_transport_params *t_params = &p_rt->transport_params;
struct sdw_port_params *p_params = &p_rt->port_params;
struct sdw_slave_prop *slave_prop = &s_rt->slave->prop;
u32 addr1, addr2, addr3, addr4, addr5, addr6;
struct sdw_dpn_prop *dpn_prop;
int ret;
u8 wbuf;
dpn_prop = sdw_get_slave_dpn_prop(s_rt->slave,
s_rt->direction,
t_params->port_num);
if (!dpn_prop)
return -EINVAL;
addr1 = SDW_DPN_PORTCTRL(t_params->port_num);
addr2 = SDW_DPN_BLOCKCTRL1(t_params->port_num);
if (bus->params.next_bank) {
addr3 = SDW_DPN_SAMPLECTRL1_B1(t_params->port_num);
addr4 = SDW_DPN_OFFSETCTRL1_B1(t_params->port_num);
addr5 = SDW_DPN_BLOCKCTRL2_B1(t_params->port_num);
addr6 = SDW_DPN_LANECTRL_B1(t_params->port_num);
} else {
addr3 = SDW_DPN_SAMPLECTRL1_B0(t_params->port_num);
addr4 = SDW_DPN_OFFSETCTRL1_B0(t_params->port_num);
addr5 = SDW_DPN_BLOCKCTRL2_B0(t_params->port_num);
addr6 = SDW_DPN_LANECTRL_B0(t_params->port_num);
}
/* Program DPN_PortCtrl register */
wbuf = p_params->data_mode << SDW_REG_SHIFT(SDW_DPN_PORTCTRL_DATAMODE);
wbuf |= p_params->flow_mode;
ret = sdw_update(s_rt->slave,