[linux-block.git] / drivers / soundwire / mipi_disco.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-master-%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_mode = SDW_CLK_STOP_MODE0;

	if (fwnode_property_read_bool(link,
				      "mipi-sdw-clock-stop-mode1-supported"))
		prop->clk_stop_mode |= SDW_CLK_STOP_MODE1;

	fwnode_property_read_u32(link,
				 "mipi-sdw-max-clock-frequency",
				 &prop->max_freq);

	nval = fwnode_property_read_u32_array(link,
			"mipi-sdw-clock-frequencies-supported", NULL, 0);
	if (nval > 0) {
		prop->num_freq = nval;
		prop->freq = devm_kcalloc(bus->dev, prop->num_freq,
					  sizeof(*prop->freq), GFP_KERNEL);
		if (!prop->freq)
			return -ENOMEM;

		fwnode_property_read_u32_array(link,
				"mipi-sdw-clock-frequencies-supported",
				prop->freq, prop->num_freq);
	}

	/*
	 * Check the frequencies supported. If FW doesn't provide max
	 * freq, then populate here by checking values.
	 */
	if (!prop->max_freq && prop->freq) {
		prop->max_freq = prop->freq[0];
		for (i = 1; i < prop->num_freq; i++) {
			if (prop->freq[i] > prop->max_freq)
				prop->max_freq = prop->freq[i];
		}
	}

	nval = fwnode_property_read_u32_array(link,
			"mipi-sdw-supported-clock-gears", NULL, 0);
	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)
			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);

	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_read_u32_array(port,
			"mipi-sdw-port-wordlength-configs", NULL, 0);
	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->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->device_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_read_u32_array(node,
				"mipi-sdw-port-wordlength-configs", NULL, 0);
		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)
				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].device_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_read_u32_array(node,
				"mipi-sdw-channel-number-list", NULL, 0);
		if (nval > 0) {
			dpn[i].num_ch = nval;
			dpn[i].ch = devm_kcalloc(&slave->dev, dpn[i].num_ch,
						 sizeof(*dpn[i].ch),
						 GFP_KERNEL);
			if (!dpn[i].ch)
				return -ENOMEM;

			fwnode_property_read_u32_array(node,
					"mipi-sdw-channel-number-list",
					dpn[i].ch, dpn[i].num_ch);
		}

		nval = fwnode_property_read_u32_array(node,
				"mipi-sdw-channel-combination-list", NULL, 0);
		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)
				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 */

		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 num_of_ports, nval, i, dp0 = 0;

	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)
			return -ENOMEM;

		sdw_slave_read_dp0(slave, port, prop->dp0_prop);
		dp0 = 1;
	}

	/*
	 * 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");

	/* some ports are bidirectional so check total ports by ORing */
	nval = prop->source_ports | prop->sink_ports;
	num_of_ports = hweight32(nval) + dp0; /* add DP0 */

	/* Allocate port_ready based on num_of_ports */
	slave->port_ready = devm_kcalloc(&slave->dev, num_of_ports,
					 sizeof(*slave->port_ready),
					 GFP_KERNEL);
	if (!slave->port_ready)
		return -ENOMEM;

	/* Initialize completion */
	for (i = 0; i < num_of_ports; i++)
		init_completion(&slave->port_ready[i]);

	return 0;
}
EXPORT_SYMBOL(sdw_slave_read_prop);
Commit	Line	Data
56d4fe31 VK	1	// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
	2	// Copyright(c) 2015-17 Intel Corporation.
	3
	4	/*
	5	* MIPI Discovery And Configuration (DisCo) Specification for SoundWire
	6	* specifies properties to be implemented for SoundWire Masters and Slaves.
	7	* The DisCo spec doesn't mandate these properties. However, SDW bus cannot
	8	* work without knowing these values.
	9	*
	10	* The helper functions read the Master and Slave properties. Implementers
	11	* of Master or Slave drivers can use any of the below three mechanisms:
	12	* a) Use these APIs here as .read_prop() callback for Master and Slave
	13	* b) Implement own methods and set those as .read_prop(), but invoke
	14	* APIs in this file for generic read and override the values with
	15	* platform specific data
	16	* c) Implement ones own methods which do not use anything provided
	17	* here
	18	*/
	19
	20	#include <linux/device.h>
	21	#include <linux/property.h>
	22	#include <linux/mod_devicetable.h>
	23	#include <linux/soundwire/sdw.h>
	24	#include "bus.h"
	25
	26	/**
	27	* sdw_master_read_prop() - Read Master properties
	28	* @bus: SDW bus instance
	29	*/
	30	int sdw_master_read_prop(struct sdw_bus *bus)
	31	{
	32	struct sdw_master_prop *prop = &bus->prop;
	33	struct fwnode_handle *link;
	34	char name[32];
	35	int nval, i;
	36
	37	device_property_read_u32(bus->dev,
31dba312 PLB	38	"mipi-sdw-sw-interface-revision",
31dba312 PLB	39	&prop->revision);
56d4fe31 VK	40
	41	/* Find master handle */
	42	snprintf(name, sizeof(name),
31dba312	43	"mipi-sdw-master-%d-subproperties", bus->link_id);
56d4fe31 VK	44
	45	link = device_get_named_child_node(bus->dev, name);
	46	if (!link) {
	47	dev_err(bus->dev, "Master node %s not found\n", name);
	48	return -EIO;
	49	}
	50
	51	if (fwnode_property_read_bool(link,
00910f3c	52	"mipi-sdw-clock-stop-mode0-supported"))
56d4fe31 VK	53	prop->clk_stop_mode = SDW_CLK_STOP_MODE0;
	54
	55	if (fwnode_property_read_bool(link,
00910f3c	56	"mipi-sdw-clock-stop-mode1-supported"))
56d4fe31 VK	57	prop->clk_stop_mode \|= SDW_CLK_STOP_MODE1;
	58
	59	fwnode_property_read_u32(link,
31dba312 PLB	60	"mipi-sdw-max-clock-frequency",
31dba312 PLB	61	&prop->max_freq);
56d4fe31 VK	62
	63	nval = fwnode_property_read_u32_array(link,
	64	"mipi-sdw-clock-frequencies-supported", NULL, 0);
	65	if (nval > 0) {
56d4fe31 VK	66	prop->num_freq = nval;
56d4fe31 VK	67	prop->freq = devm_kcalloc(bus->dev, prop->num_freq,
31dba312	68	sizeof(*prop->freq), GFP_KERNEL);
56d4fe31 VK	69	if (!prop->freq)
	70	return -ENOMEM;
	71
	72	fwnode_property_read_u32_array(link,
	73	"mipi-sdw-clock-frequencies-supported",
	74	prop->freq, prop->num_freq);
	75	}
	76
	77	/*
	78	* Check the frequencies supported. If FW doesn't provide max
	79	* freq, then populate here by checking values.
	80	*/
	81	if (!prop->max_freq && prop->freq) {
	82	prop->max_freq = prop->freq[0];
	83	for (i = 1; i < prop->num_freq; i++) {
	84	if (prop->freq[i] > prop->max_freq)
	85	prop->max_freq = prop->freq[i];
	86	}
	87	}
	88
	89	nval = fwnode_property_read_u32_array(link,
	90	"mipi-sdw-supported-clock-gears", NULL, 0);
	91	if (nval > 0) {
56d4fe31 VK	92	prop->num_clk_gears = nval;
56d4fe31 VK	93	prop->clk_gears = devm_kcalloc(bus->dev, prop->num_clk_gears,
31dba312 PLB	94	sizeof(*prop->clk_gears),
31dba312 PLB	95	GFP_KERNEL);
56d4fe31 VK	96	if (!prop->clk_gears)
	97	return -ENOMEM;
	98
	99	fwnode_property_read_u32_array(link,
31dba312 PLB	100	"mipi-sdw-supported-clock-gears",
	101	prop->clk_gears,
	102	prop->num_clk_gears);
56d4fe31 VK	103	}
	104
	105	fwnode_property_read_u32(link, "mipi-sdw-default-frame-rate",
31dba312	106	&prop->default_frame_rate);
56d4fe31 VK	107
56d4fe31 VK	108	fwnode_property_read_u32(link, "mipi-sdw-default-frame-row-size",
31dba312	109	&prop->default_row);
56d4fe31 VK	110
56d4fe31 VK	111	fwnode_property_read_u32(link, "mipi-sdw-default-frame-col-size",
31dba312	112	&prop->default_col);
56d4fe31 VK	113
	114	prop->dynamic_frame = fwnode_property_read_bool(link,
	115	"mipi-sdw-dynamic-frame-shape");
	116
	117	fwnode_property_read_u32(link, "mipi-sdw-command-error-threshold",
31dba312	118	&prop->err_threshold);
56d4fe31 VK	119
	120	return 0;
	121	}
	122	EXPORT_SYMBOL(sdw_master_read_prop);
	123
	124	static int sdw_slave_read_dp0(struct sdw_slave *slave,
31dba312 PLB	125	struct fwnode_handle *port,
31dba312 PLB	126	struct sdw_dp0_prop *dp0)
56d4fe31 VK	127	{
	128	int nval;
	129
	130	fwnode_property_read_u32(port, "mipi-sdw-port-max-wordlength",
31dba312	131	&dp0->max_word);
56d4fe31 VK	132
56d4fe31 VK	133	fwnode_property_read_u32(port, "mipi-sdw-port-min-wordlength",
31dba312	134	&dp0->min_word);
56d4fe31 VK	135
	136	nval = fwnode_property_read_u32_array(port,
	137	"mipi-sdw-port-wordlength-configs", NULL, 0);
	138	if (nval > 0) {
	139
	140	dp0->num_words = nval;
	141	dp0->words = devm_kcalloc(&slave->dev,
31dba312 PLB	142	dp0->num_words, sizeof(*dp0->words),
31dba312 PLB	143	GFP_KERNEL);
56d4fe31 VK	144	if (!dp0->words)
	145	return -ENOMEM;
	146
	147	fwnode_property_read_u32_array(port,
	148	"mipi-sdw-port-wordlength-configs",
	149	dp0->words, dp0->num_words);
	150	}
	151
31dba312 PLB	152	dp0->flow_controlled = fwnode_property_read_bool(port,
31dba312 PLB	153	"mipi-sdw-bra-flow-controlled");
56d4fe31	154
31dba312 PLB	155	dp0->simple_ch_prep_sm = fwnode_property_read_bool(port,
31dba312 PLB	156	"mipi-sdw-simplified-channel-prepare-sm");
56d4fe31	157
31dba312 PLB	158	dp0->device_interrupts = fwnode_property_read_bool(port,
31dba312 PLB	159	"mipi-sdw-imp-def-dp0-interrupts-supported");
56d4fe31 VK	160
	161	return 0;
	162	}
	163
	164	static int sdw_slave_read_dpn(struct sdw_slave *slave,
31dba312 PLB	165	struct sdw_dpn_prop *dpn, int count, int ports,
31dba312 PLB	166	char *type)
56d4fe31 VK	167	{
	168	struct fwnode_handle *node;
	169	u32 bit, i = 0;
	170	int nval;
	171	unsigned long addr;
	172	char name[40];
	173
	174	addr = ports;
	175	/* valid ports are 1 to 14 so apply mask */
	176	addr &= GENMASK(14, 1);
	177
	178	for_each_set_bit(bit, &addr, 32) {
	179	snprintf(name, sizeof(name),
31dba312	180	"mipi-sdw-dp-%d-%s-subproperties", bit, type);
56d4fe31 VK	181
	182	dpn[i].num = bit;
	183
	184	node = device_get_named_child_node(&slave->dev, name);
	185	if (!node) {
	186	dev_err(&slave->dev, "%s dpN not found\n", name);
	187	return -EIO;
	188	}
	189
	190	fwnode_property_read_u32(node, "mipi-sdw-port-max-wordlength",
31dba312	191	&dpn[i].max_word);
56d4fe31	192	fwnode_property_read_u32(node, "mipi-sdw-port-min-wordlength",
31dba312	193	&dpn[i].min_word);
56d4fe31 VK	194
	195	nval = fwnode_property_read_u32_array(node,
	196	"mipi-sdw-port-wordlength-configs", NULL, 0);
	197	if (nval > 0) {
56d4fe31 VK	198	dpn[i].num_words = nval;
56d4fe31 VK	199	dpn[i].words = devm_kcalloc(&slave->dev,
31dba312 PLB	200	dpn[i].num_words,
	201	sizeof(*dpn[i].words),
	202	GFP_KERNEL);
56d4fe31 VK	203	if (!dpn[i].words)
	204	return -ENOMEM;
	205
	206	fwnode_property_read_u32_array(node,
	207	"mipi-sdw-port-wordlength-configs",
	208	dpn[i].words, dpn[i].num_words);
	209	}
	210
	211	fwnode_property_read_u32(node, "mipi-sdw-data-port-type",
31dba312	212	&dpn[i].type);
56d4fe31 VK	213
56d4fe31 VK	214	fwnode_property_read_u32(node,
31dba312 PLB	215	"mipi-sdw-max-grouping-supported",
31dba312 PLB	216	&dpn[i].max_grouping);
56d4fe31 VK	217
	218	dpn[i].simple_ch_prep_sm = fwnode_property_read_bool(node,
	219	"mipi-sdw-simplified-channelprepare-sm");
	220
	221	fwnode_property_read_u32(node,
31dba312 PLB	222	"mipi-sdw-port-channelprepare-timeout",
31dba312 PLB	223	&dpn[i].ch_prep_timeout);
56d4fe31 VK	224
	225	fwnode_property_read_u32(node,
	226	"mipi-sdw-imp-def-dpn-interrupts-supported",
	227	&dpn[i].device_interrupts);
	228
	229	fwnode_property_read_u32(node, "mipi-sdw-min-channel-number",
31dba312	230	&dpn[i].min_ch);
56d4fe31 VK	231
56d4fe31 VK	232	fwnode_property_read_u32(node, "mipi-sdw-max-channel-number",
31dba312	233	&dpn[i].max_ch);
56d4fe31 VK	234
	235	nval = fwnode_property_read_u32_array(node,
	236	"mipi-sdw-channel-number-list", NULL, 0);
	237	if (nval > 0) {
56d4fe31 VK	238	dpn[i].num_ch = nval;
56d4fe31 VK	239	dpn[i].ch = devm_kcalloc(&slave->dev, dpn[i].num_ch,
31dba312 PLB	240	sizeof(*dpn[i].ch),
31dba312 PLB	241	GFP_KERNEL);
56d4fe31 VK	242	if (!dpn[i].ch)
	243	return -ENOMEM;
	244
	245	fwnode_property_read_u32_array(node,
	246	"mipi-sdw-channel-number-list",
	247	dpn[i].ch, dpn[i].num_ch);
	248	}
	249
	250	nval = fwnode_property_read_u32_array(node,
	251	"mipi-sdw-channel-combination-list", NULL, 0);
	252	if (nval > 0) {
56d4fe31 VK	253	dpn[i].num_ch_combinations = nval;
	254	dpn[i].ch_combinations = devm_kcalloc(&slave->dev,
	255	dpn[i].num_ch_combinations,
	256	sizeof(*dpn[i].ch_combinations),
	257	GFP_KERNEL);
	258	if (!dpn[i].ch_combinations)
	259	return -ENOMEM;
	260
	261	fwnode_property_read_u32_array(node,
	262	"mipi-sdw-channel-combination-list",
	263	dpn[i].ch_combinations,
	264	dpn[i].num_ch_combinations);
	265	}
	266
	267	fwnode_property_read_u32(node,
	268	"mipi-sdw-modes-supported", &dpn[i].modes);
	269
	270	fwnode_property_read_u32(node, "mipi-sdw-max-async-buffer",
31dba312	271	&dpn[i].max_async_buffer);
56d4fe31 VK	272
	273	dpn[i].block_pack_mode = fwnode_property_read_bool(node,
	274	"mipi-sdw-block-packing-mode");
	275
	276	fwnode_property_read_u32(node, "mipi-sdw-port-encoding-type",
31dba312	277	&dpn[i].port_encoding);
56d4fe31 VK	278
	279	/* TODO: Read audio mode */
	280
	281	i++;
	282	}
	283
	284	return 0;
	285	}
	286
	287	/**
	288	* sdw_slave_read_prop() - Read Slave properties
	289	* @slave: SDW Slave
	290	*/
	291	int sdw_slave_read_prop(struct sdw_slave *slave)
	292	{
	293	struct sdw_slave_prop *prop = &slave->prop;
	294	struct device *dev = &slave->dev;
	295	struct fwnode_handle *port;
	296	int num_of_ports, nval, i, dp0 = 0;
	297
	298	device_property_read_u32(dev, "mipi-sdw-sw-interface-revision",
31dba312	299	&prop->mipi_revision);
56d4fe31 VK	300
	301	prop->wake_capable = device_property_read_bool(dev,
	302	"mipi-sdw-wake-up-unavailable");
	303	prop->wake_capable = !prop->wake_capable;
	304
	305	prop->test_mode_capable = device_property_read_bool(dev,
	306	"mipi-sdw-test-mode-supported");
	307
	308	prop->clk_stop_mode1 = false;
	309	if (device_property_read_bool(dev,
	310	"mipi-sdw-clock-stop-mode1-supported"))
	311	prop->clk_stop_mode1 = true;
	312
	313	prop->simple_clk_stop_capable = device_property_read_bool(dev,
	314	"mipi-sdw-simplified-clockstopprepare-sm-supported");
	315
	316	device_property_read_u32(dev, "mipi-sdw-clockstopprepare-timeout",
31dba312	317	&prop->clk_stop_timeout);
56d4fe31 VK	318
56d4fe31 VK	319	device_property_read_u32(dev, "mipi-sdw-slave-channelprepare-timeout",
31dba312	320	&prop->ch_prep_timeout);
56d4fe31 VK	321
	322	device_property_read_u32(dev,
	323	"mipi-sdw-clockstopprepare-hard-reset-behavior",
	324	&prop->reset_behave);
	325
	326	prop->high_PHY_capable = device_property_read_bool(dev,
	327	"mipi-sdw-highPHY-capable");
	328
	329	prop->paging_support = device_property_read_bool(dev,
	330	"mipi-sdw-paging-support");
	331
	332	prop->bank_delay_support = device_property_read_bool(dev,
	333	"mipi-sdw-bank-delay-support");
	334
	335	device_property_read_u32(dev,
	336	"mipi-sdw-port15-read-behavior", &prop->p15_behave);
	337
	338	device_property_read_u32(dev, "mipi-sdw-master-count",
31dba312	339	&prop->master_count);
56d4fe31 VK	340
56d4fe31 VK	341	device_property_read_u32(dev, "mipi-sdw-source-port-list",
31dba312	342	&prop->source_ports);
56d4fe31 VK	343
56d4fe31 VK	344	device_property_read_u32(dev, "mipi-sdw-sink-port-list",
31dba312	345	&prop->sink_ports);
56d4fe31 VK	346
	347	/* Read dp0 properties */
	348	port = device_get_named_child_node(dev, "mipi-sdw-dp-0-subproperties");
	349	if (!port) {
	350	dev_dbg(dev, "DP0 node not found!!\n");
	351	} else {
56d4fe31	352	prop->dp0_prop = devm_kzalloc(&slave->dev,
31dba312 PLB	353	sizeof(*prop->dp0_prop),
31dba312 PLB	354	GFP_KERNEL);
56d4fe31 VK	355	if (!prop->dp0_prop)
	356	return -ENOMEM;
	357
	358	sdw_slave_read_dp0(slave, port, prop->dp0_prop);
	359	dp0 = 1;
	360	}
	361
	362	/*
	363	* Based on each DPn port, get source and sink dpn properties.
	364	* Also, some ports can operate as both source or sink.
	365	*/
	366
	367	/* Allocate memory for set bits in port lists */
	368	nval = hweight32(prop->source_ports);
	369	prop->src_dpn_prop = devm_kcalloc(&slave->dev, nval,
31dba312 PLB	370	sizeof(*prop->src_dpn_prop),
31dba312 PLB	371	GFP_KERNEL);
56d4fe31 VK	372	if (!prop->src_dpn_prop)
	373	return -ENOMEM;
	374
	375	/* Read dpn properties for source port(s) */
	376	sdw_slave_read_dpn(slave, prop->src_dpn_prop, nval,
31dba312	377	prop->source_ports, "source");
56d4fe31 VK	378
	379	nval = hweight32(prop->sink_ports);
	380	prop->sink_dpn_prop = devm_kcalloc(&slave->dev, nval,
31dba312 PLB	381	sizeof(*prop->sink_dpn_prop),
31dba312 PLB	382	GFP_KERNEL);
56d4fe31 VK	383	if (!prop->sink_dpn_prop)
	384	return -ENOMEM;
	385
	386	/* Read dpn properties for sink port(s) */
	387	sdw_slave_read_dpn(slave, prop->sink_dpn_prop, nval,
31dba312	388	prop->sink_ports, "sink");
56d4fe31 VK	389
	390	/* some ports are bidirectional so check total ports by ORing */
	391	nval = prop->source_ports \| prop->sink_ports;
	392	num_of_ports = hweight32(nval) + dp0; /* add DP0 */
	393
	394	/* Allocate port_ready based on num_of_ports */
	395	slave->port_ready = devm_kcalloc(&slave->dev, num_of_ports,
31dba312 PLB	396	sizeof(*slave->port_ready),
31dba312 PLB	397	GFP_KERNEL);
56d4fe31 VK	398	if (!slave->port_ready)
	399	return -ENOMEM;
	400
	401	/* Initialize completion */
	402	for (i = 0; i < num_of_ports; i++)
	403	init_completion(&slave->port_ready[i]);
	404
	405	return 0;
	406	}
	407	EXPORT_SYMBOL(sdw_slave_read_prop);