406 lines
11 KiB
C
406 lines
11 KiB
C
// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
|
|
// Copyright(c) 2015-17 Intel Corporation.
|
|
|
|
/*
|
|
* MIPI Discovery And Configuration (DisCo) Specification for SoundWire
|
|
* specifies properties to be implemented for SoundWire Masters and Slaves.
|
|
* The DisCo spec doesn't mandate these properties. However, SDW bus cannot
|
|
* work without knowing these values.
|
|
*
|
|
* The helper functions read the Master and Slave properties. Implementers
|
|
* of Master or Slave drivers can use any of the below three mechanisms:
|
|
* a) Use these APIs here as .read_prop() callback for Master and Slave
|
|
* b) Implement own methods and set those as .read_prop(), but invoke
|
|
* APIs in this file for generic read and override the values with
|
|
* platform specific data
|
|
* c) Implement ones own methods which do not use anything provided
|
|
* here
|
|
*/
|
|
|
|
#include <linux/device.h>
|
|
#include <linux/property.h>
|
|
#include <linux/mod_devicetable.h>
|
|
#include <linux/soundwire/sdw.h>
|
|
#include "bus.h"
|
|
|
|
/**
|
|
* sdw_master_read_prop() - Read Master properties
|
|
* @bus: SDW bus instance
|
|
*/
|
|
int sdw_master_read_prop(struct sdw_bus *bus)
|
|
{
|
|
struct sdw_master_prop *prop = &bus->prop;
|
|
struct fwnode_handle *link;
|
|
char name[32];
|
|
int nval, i;
|
|
|
|
device_property_read_u32(bus->dev,
|
|
"mipi-sdw-sw-interface-revision",
|
|
&prop->revision);
|
|
|
|
/* Find master handle */
|
|
snprintf(name, sizeof(name),
|
|
"mipi-sdw-link-%d-subproperties", bus->link_id);
|
|
|
|
link = device_get_named_child_node(bus->dev, name);
|
|
if (!link) {
|
|
dev_err(bus->dev, "Master node %s not found\n", name);
|
|
return -EIO;
|
|
}
|
|
|
|
if (fwnode_property_read_bool(link,
|
|
"mipi-sdw-clock-stop-mode0-supported"))
|
|
prop->clk_stop_modes |= BIT(SDW_CLK_STOP_MODE0);
|
|
|
|
if (fwnode_property_read_bool(link,
|
|
"mipi-sdw-clock-stop-mode1-supported"))
|
|
prop->clk_stop_modes |= BIT(SDW_CLK_STOP_MODE1);
|
|
|
|
fwnode_property_read_u32(link,
|
|
"mipi-sdw-max-clock-frequency",
|
|
&prop->max_clk_freq);
|
|
|
|
nval = fwnode_property_count_u32(link, "mipi-sdw-clock-frequencies-supported");
|
|
if (nval > 0) {
|
|
prop->num_clk_freq = nval;
|
|
prop->clk_freq = devm_kcalloc(bus->dev, prop->num_clk_freq,
|
|
sizeof(*prop->clk_freq),
|
|
GFP_KERNEL);
|
|
if (!prop->clk_freq) {
|
|
fwnode_handle_put(link);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
fwnode_property_read_u32_array(link,
|
|
"mipi-sdw-clock-frequencies-supported",
|
|
prop->clk_freq, prop->num_clk_freq);
|
|
}
|
|
|
|
/*
|
|
* Check the frequencies supported. If FW doesn't provide max
|
|
* freq, then populate here by checking values.
|
|
*/
|
|
if (!prop->max_clk_freq && prop->clk_freq) {
|
|
prop->max_clk_freq = prop->clk_freq[0];
|
|
for (i = 1; i < prop->num_clk_freq; i++) {
|
|
if (prop->clk_freq[i] > prop->max_clk_freq)
|
|
prop->max_clk_freq = prop->clk_freq[i];
|
|
}
|
|
}
|
|
|
|
nval = fwnode_property_count_u32(link, "mipi-sdw-supported-clock-gears");
|
|
if (nval > 0) {
|
|
prop->num_clk_gears = nval;
|
|
prop->clk_gears = devm_kcalloc(bus->dev, prop->num_clk_gears,
|
|
sizeof(*prop->clk_gears),
|
|
GFP_KERNEL);
|
|
if (!prop->clk_gears) {
|
|
fwnode_handle_put(link);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
fwnode_property_read_u32_array(link,
|
|
"mipi-sdw-supported-clock-gears",
|
|
prop->clk_gears,
|
|
prop->num_clk_gears);
|
|
}
|
|
|
|
fwnode_property_read_u32(link, "mipi-sdw-default-frame-rate",
|
|
&prop->default_frame_rate);
|
|
|
|
fwnode_property_read_u32(link, "mipi-sdw-default-frame-row-size",
|
|
&prop->default_row);
|
|
|
|
fwnode_property_read_u32(link, "mipi-sdw-default-frame-col-size",
|
|
&prop->default_col);
|
|
|
|
prop->dynamic_frame = fwnode_property_read_bool(link,
|
|
"mipi-sdw-dynamic-frame-shape");
|
|
|
|
fwnode_property_read_u32(link, "mipi-sdw-command-error-threshold",
|
|
&prop->err_threshold);
|
|
|
|
fwnode_handle_put(link);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(sdw_master_read_prop);
|
|
|
|
static int sdw_slave_read_dp0(struct sdw_slave *slave,
|
|
struct fwnode_handle *port,
|
|
struct sdw_dp0_prop *dp0)
|
|
{
|
|
int nval;
|
|
|
|
fwnode_property_read_u32(port, "mipi-sdw-port-max-wordlength",
|
|
&dp0->max_word);
|
|
|
|
fwnode_property_read_u32(port, "mipi-sdw-port-min-wordlength",
|
|
&dp0->min_word);
|
|
|
|
nval = fwnode_property_count_u32(port, "mipi-sdw-port-wordlength-configs");
|
|
if (nval > 0) {
|
|
|
|
dp0->num_words = nval;
|
|
dp0->words = devm_kcalloc(&slave->dev,
|
|
dp0->num_words, sizeof(*dp0->words),
|
|
GFP_KERNEL);
|
|
if (!dp0->words)
|
|
return -ENOMEM;
|
|
|
|
fwnode_property_read_u32_array(port,
|
|
"mipi-sdw-port-wordlength-configs",
|
|
dp0->words, dp0->num_words);
|
|
}
|
|
|
|
dp0->BRA_flow_controlled = fwnode_property_read_bool(port,
|
|
"mipi-sdw-bra-flow-controlled");
|
|
|
|
dp0->simple_ch_prep_sm = fwnode_property_read_bool(port,
|
|
"mipi-sdw-simplified-channel-prepare-sm");
|
|
|
|
dp0->imp_def_interrupts = fwnode_property_read_bool(port,
|
|
"mipi-sdw-imp-def-dp0-interrupts-supported");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sdw_slave_read_dpn(struct sdw_slave *slave,
|
|
struct sdw_dpn_prop *dpn, int count, int ports,
|
|
char *type)
|
|
{
|
|
struct fwnode_handle *node;
|
|
u32 bit, i = 0;
|
|
int nval;
|
|
unsigned long addr;
|
|
char name[40];
|
|
|
|
addr = ports;
|
|
/* valid ports are 1 to 14 so apply mask */
|
|
addr &= GENMASK(14, 1);
|
|
|
|
for_each_set_bit(bit, &addr, 32) {
|
|
snprintf(name, sizeof(name),
|
|
"mipi-sdw-dp-%d-%s-subproperties", bit, type);
|
|
|
|
dpn[i].num = bit;
|
|
|
|
node = device_get_named_child_node(&slave->dev, name);
|
|
if (!node) {
|
|
dev_err(&slave->dev, "%s dpN not found\n", name);
|
|
return -EIO;
|
|
}
|
|
|
|
fwnode_property_read_u32(node, "mipi-sdw-port-max-wordlength",
|
|
&dpn[i].max_word);
|
|
fwnode_property_read_u32(node, "mipi-sdw-port-min-wordlength",
|
|
&dpn[i].min_word);
|
|
|
|
nval = fwnode_property_count_u32(node, "mipi-sdw-port-wordlength-configs");
|
|
if (nval > 0) {
|
|
dpn[i].num_words = nval;
|
|
dpn[i].words = devm_kcalloc(&slave->dev,
|
|
dpn[i].num_words,
|
|
sizeof(*dpn[i].words),
|
|
GFP_KERNEL);
|
|
if (!dpn[i].words) {
|
|
fwnode_handle_put(node);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
fwnode_property_read_u32_array(node,
|
|
"mipi-sdw-port-wordlength-configs",
|
|
dpn[i].words, dpn[i].num_words);
|
|
}
|
|
|
|
fwnode_property_read_u32(node, "mipi-sdw-data-port-type",
|
|
&dpn[i].type);
|
|
|
|
fwnode_property_read_u32(node,
|
|
"mipi-sdw-max-grouping-supported",
|
|
&dpn[i].max_grouping);
|
|
|
|
dpn[i].simple_ch_prep_sm = fwnode_property_read_bool(node,
|
|
"mipi-sdw-simplified-channelprepare-sm");
|
|
|
|
fwnode_property_read_u32(node,
|
|
"mipi-sdw-port-channelprepare-timeout",
|
|
&dpn[i].ch_prep_timeout);
|
|
|
|
fwnode_property_read_u32(node,
|
|
"mipi-sdw-imp-def-dpn-interrupts-supported",
|
|
&dpn[i].imp_def_interrupts);
|
|
|
|
fwnode_property_read_u32(node, "mipi-sdw-min-channel-number",
|
|
&dpn[i].min_ch);
|
|
|
|
fwnode_property_read_u32(node, "mipi-sdw-max-channel-number",
|
|
&dpn[i].max_ch);
|
|
|
|
nval = fwnode_property_count_u32(node, "mipi-sdw-channel-number-list");
|
|
if (nval > 0) {
|
|
dpn[i].num_channels = nval;
|
|
dpn[i].channels = devm_kcalloc(&slave->dev,
|
|
dpn[i].num_channels,
|
|
sizeof(*dpn[i].channels),
|
|
GFP_KERNEL);
|
|
if (!dpn[i].channels) {
|
|
fwnode_handle_put(node);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
fwnode_property_read_u32_array(node,
|
|
"mipi-sdw-channel-number-list",
|
|
dpn[i].channels, dpn[i].num_channels);
|
|
}
|
|
|
|
nval = fwnode_property_count_u32(node, "mipi-sdw-channel-combination-list");
|
|
if (nval > 0) {
|
|
dpn[i].num_ch_combinations = nval;
|
|
dpn[i].ch_combinations = devm_kcalloc(&slave->dev,
|
|
dpn[i].num_ch_combinations,
|
|
sizeof(*dpn[i].ch_combinations),
|
|
GFP_KERNEL);
|
|
if (!dpn[i].ch_combinations) {
|
|
fwnode_handle_put(node);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
fwnode_property_read_u32_array(node,
|
|
"mipi-sdw-channel-combination-list",
|
|
dpn[i].ch_combinations,
|
|
dpn[i].num_ch_combinations);
|
|
}
|
|
|
|
fwnode_property_read_u32(node,
|
|
"mipi-sdw-modes-supported", &dpn[i].modes);
|
|
|
|
fwnode_property_read_u32(node, "mipi-sdw-max-async-buffer",
|
|
&dpn[i].max_async_buffer);
|
|
|
|
dpn[i].block_pack_mode = fwnode_property_read_bool(node,
|
|
"mipi-sdw-block-packing-mode");
|
|
|
|
fwnode_property_read_u32(node, "mipi-sdw-port-encoding-type",
|
|
&dpn[i].port_encoding);
|
|
|
|
/* TODO: Read audio mode */
|
|
|
|
fwnode_handle_put(node);
|
|
|
|
i++;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* sdw_slave_read_prop() - Read Slave properties
|
|
* @slave: SDW Slave
|
|
*/
|
|
int sdw_slave_read_prop(struct sdw_slave *slave)
|
|
{
|
|
struct sdw_slave_prop *prop = &slave->prop;
|
|
struct device *dev = &slave->dev;
|
|
struct fwnode_handle *port;
|
|
int nval;
|
|
|
|
device_property_read_u32(dev, "mipi-sdw-sw-interface-revision",
|
|
&prop->mipi_revision);
|
|
|
|
prop->wake_capable = device_property_read_bool(dev,
|
|
"mipi-sdw-wake-up-unavailable");
|
|
prop->wake_capable = !prop->wake_capable;
|
|
|
|
prop->test_mode_capable = device_property_read_bool(dev,
|
|
"mipi-sdw-test-mode-supported");
|
|
|
|
prop->clk_stop_mode1 = false;
|
|
if (device_property_read_bool(dev,
|
|
"mipi-sdw-clock-stop-mode1-supported"))
|
|
prop->clk_stop_mode1 = true;
|
|
|
|
prop->simple_clk_stop_capable = device_property_read_bool(dev,
|
|
"mipi-sdw-simplified-clockstopprepare-sm-supported");
|
|
|
|
device_property_read_u32(dev, "mipi-sdw-clockstopprepare-timeout",
|
|
&prop->clk_stop_timeout);
|
|
|
|
device_property_read_u32(dev, "mipi-sdw-slave-channelprepare-timeout",
|
|
&prop->ch_prep_timeout);
|
|
|
|
device_property_read_u32(dev,
|
|
"mipi-sdw-clockstopprepare-hard-reset-behavior",
|
|
&prop->reset_behave);
|
|
|
|
prop->high_PHY_capable = device_property_read_bool(dev,
|
|
"mipi-sdw-highPHY-capable");
|
|
|
|
prop->paging_support = device_property_read_bool(dev,
|
|
"mipi-sdw-paging-support");
|
|
|
|
prop->bank_delay_support = device_property_read_bool(dev,
|
|
"mipi-sdw-bank-delay-support");
|
|
|
|
device_property_read_u32(dev,
|
|
"mipi-sdw-port15-read-behavior", &prop->p15_behave);
|
|
|
|
device_property_read_u32(dev, "mipi-sdw-master-count",
|
|
&prop->master_count);
|
|
|
|
device_property_read_u32(dev, "mipi-sdw-source-port-list",
|
|
&prop->source_ports);
|
|
|
|
device_property_read_u32(dev, "mipi-sdw-sink-port-list",
|
|
&prop->sink_ports);
|
|
|
|
/* Read dp0 properties */
|
|
port = device_get_named_child_node(dev, "mipi-sdw-dp-0-subproperties");
|
|
if (!port) {
|
|
dev_dbg(dev, "DP0 node not found!!\n");
|
|
} else {
|
|
prop->dp0_prop = devm_kzalloc(&slave->dev,
|
|
sizeof(*prop->dp0_prop),
|
|
GFP_KERNEL);
|
|
if (!prop->dp0_prop) {
|
|
fwnode_handle_put(port);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
sdw_slave_read_dp0(slave, port, prop->dp0_prop);
|
|
|
|
fwnode_handle_put(port);
|
|
}
|
|
|
|
/*
|
|
* Based on each DPn port, get source and sink dpn properties.
|
|
* Also, some ports can operate as both source or sink.
|
|
*/
|
|
|
|
/* Allocate memory for set bits in port lists */
|
|
nval = hweight32(prop->source_ports);
|
|
prop->src_dpn_prop = devm_kcalloc(&slave->dev, nval,
|
|
sizeof(*prop->src_dpn_prop),
|
|
GFP_KERNEL);
|
|
if (!prop->src_dpn_prop)
|
|
return -ENOMEM;
|
|
|
|
/* Read dpn properties for source port(s) */
|
|
sdw_slave_read_dpn(slave, prop->src_dpn_prop, nval,
|
|
prop->source_ports, "source");
|
|
|
|
nval = hweight32(prop->sink_ports);
|
|
prop->sink_dpn_prop = devm_kcalloc(&slave->dev, nval,
|
|
sizeof(*prop->sink_dpn_prop),
|
|
GFP_KERNEL);
|
|
if (!prop->sink_dpn_prop)
|
|
return -ENOMEM;
|
|
|
|
/* Read dpn properties for sink port(s) */
|
|
sdw_slave_read_dpn(slave, prop->sink_dpn_prop, nval,
|
|
prop->sink_ports, "sink");
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(sdw_slave_read_prop);
|