From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- drivers/soundwire/mipi_disco.c | 387 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 387 insertions(+) create mode 100644 drivers/soundwire/mipi_disco.c (limited to 'drivers/soundwire/mipi_disco.c') diff --git a/drivers/soundwire/mipi_disco.c b/drivers/soundwire/mipi_disco.c new file mode 100644 index 0000000000..55a9c51c84 --- /dev/null +++ b/drivers/soundwire/mipi_disco.c @@ -0,0 +1,387 @@ +// 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 +#include +#include +#include +#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) + 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) + 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_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) + 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) + 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) + 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 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) + return -ENOMEM; + + sdw_slave_read_dp0(slave, port, prop->dp0_prop); + } + + /* + * 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); -- cgit v1.2.3