| // 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 <sound/soc.h> |
| #include "bus.h" |
| |
| /* |
| * Array of supported rows and columns as per MIPI SoundWire Specification 1.1 |
| * |
| * The rows are arranged as per the array index value programmed |
| * in register. The index 15 has dummy value 0 in order to fill hole. |
| */ |
| int sdw_rows[SDW_FRAME_ROWS] = {48, 50, 60, 64, 75, 80, 125, 147, |
| 96, 100, 120, 128, 150, 160, 250, 0, |
| 192, 200, 240, 256, 72, 144, 90, 180}; |
| EXPORT_SYMBOL(sdw_rows); |
| |
| int sdw_cols[SDW_FRAME_COLS] = {2, 4, 6, 8, 10, 12, 14, 16}; |
| EXPORT_SYMBOL(sdw_cols); |
| |
| int sdw_find_col_index(int col) |
| { |
| int i; |
| |
| for (i = 0; i < SDW_FRAME_COLS; i++) { |
| if (sdw_cols[i] == col) |
| return i; |
| } |
| |
| pr_warn("Requested column not found, selecting lowest column no: 2\n"); |
| return 0; |
| } |
| EXPORT_SYMBOL(sdw_find_col_index); |
| |
| int sdw_find_row_index(int row) |
| { |
| int i; |
| |
| for (i = 0; i < SDW_FRAME_ROWS; i++) { |
| if (sdw_rows[i] == row) |
| return i; |
| } |
| |
| pr_warn("Requested row not found, selecting lowest row no: 48\n"); |
| return 0; |
| } |
| EXPORT_SYMBOL(sdw_find_row_index); |
| |
| 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\n"); |
| 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\n"); |
| return ret; |
| } |
| |
| /* |
| * Data ports are FULL, SIMPLE and REDUCED. This function handles |
| * FULL and REDUCED only 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 = FIELD_GET(SDW_DPN_SAMPLECTRL_HIGH, t_params->sample_interval - 1); |
| |
| ret = sdw_write(slave, addr3, wbuf); |
| if (ret < 0) { |
| dev_err(bus->dev, "DPN_SampleCtrl2 register write failed\n"); |
| return ret; |
| } |
| |
| /* Program DPN_HCtrl register */ |
| wbuf = FIELD_PREP(SDW_DPN_HCTRL_HSTART, t_params->hstart); |
| wbuf |= FIELD_PREP(SDW_DPN_HCTRL_HSTOP, t_params->hstop); |
| |
| ret = sdw_write(slave, addr4, wbuf); |
| if (ret < 0) |
| dev_err(bus->dev, "DPN_HCtrl register write failed\n"); |
| |
| 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; |
| |
| if (s_rt->slave->is_mockup_device) |
| return 0; |
| |
| 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 = FIELD_PREP(SDW_DPN_PORTCTRL_DATAMODE, p_params->data_mode); |
| wbuf |= FIELD_PREP(SDW_DPN_PORTCTRL_FLOWMODE, p_params->flow_mode); |
| |
| ret = sdw_update(s_rt->slave, addr1, 0xF, wbuf); |
| if (ret < 0) { |
| dev_err(&s_rt->slave->dev, |
| "DPN_PortCtrl register write failed for port %d\n", |
| t_params->port_num); |
| return ret; |
| } |
| |
| if (!dpn_prop->read_only_wordlength) { |
| /* Program DPN_BlockCtrl1 register */ |
| ret = sdw_write(s_rt->slave, addr2, (p_params->bps - 1)); |
| if (ret < 0) { |
| dev_err(&s_rt->slave->dev, |
| "DPN_BlockCtrl1 register write failed for port %d\n", |
| t_params->port_num); |
| return ret; |
| } |
| } |
| |
| /* Program DPN_SampleCtrl1 register */ |
| wbuf = (t_params->sample_interval - 1) & SDW_DPN_SAMPLECTRL_LOW; |
| ret = sdw_write(s_rt->slave, addr3, wbuf); |
| if (ret < 0) { |
| dev_err(&s_rt->slave->dev, |
| "DPN_SampleCtrl1 register write failed for port %d\n", |
| t_params->port_num); |
| return ret; |
| } |
| |
| /* Program DPN_OffsetCtrl1 registers */ |
| ret = sdw_write(s_rt->slave, addr4, t_params->offset1); |
| if (ret < 0) { |
| dev_err(&s_rt->slave->dev, |
| "DPN_OffsetCtrl1 register write failed for port %d\n", |
| t_params->port_num); |
| return ret; |
| } |
| |
| /* Program DPN_BlockCtrl2 register*/ |
| if (t_params->blk_grp_ctrl_valid) { |
| ret = sdw_write(s_rt->slave, addr5, t_params->blk_grp_ctrl); |
| if (ret < 0) { |
| dev_err(&s_rt->slave->dev, |
| "DPN_BlockCtrl2 reg write failed for port %d\n", |
| t_params->port_num); |
| return ret; |
| } |
| } |
| |
| /* program DPN_LaneCtrl register */ |
| if (slave_prop->lane_control_support) { |
| ret = sdw_write(s_rt->slave, addr6, t_params->lane_ctrl); |
| if (ret < 0) { |
| dev_err(&s_rt->slave->dev, |
| "DPN_LaneCtrl register write failed for port %d\n", |
| t_params->port_num); |
| return ret; |
| } |
| } |
| |
| if (dpn_prop->type != SDW_DPN_SIMPLE) { |
| ret = _sdw_program_slave_port_params(bus, s_rt->slave, |
| t_params, dpn_prop->type); |
| if (ret < 0) |
| dev_err(&s_rt->slave->dev, |
| "Transport reg write failed for port: %d\n", |
| t_params->port_num); |
| } |
| |
| return ret; |
| } |
| |
| static int sdw_program_master_port_params(struct sdw_bus *bus, |
| struct sdw_port_runtime *p_rt) |
| { |
| int ret; |
| |
| /* |
| * we need to set transport and port parameters for the port. |
| * Transport parameters refers to the sample interval, offsets and |
| * hstart/stop etc of the data. Port parameters refers to word |
| * length, flow mode etc of the port |
| */ |
| ret = bus->port_ops->dpn_set_port_transport_params(bus, |
| &p_rt->transport_params, |
| bus->params.next_bank); |
| if (ret < 0) |
| return ret; |
| |
| return bus->port_ops->dpn_set_port_params(bus, |
| &p_rt->port_params, |
| bus->params.next_bank); |
| } |
| |
| /** |
| * sdw_program_port_params() - Programs transport parameters of Master(s) |
| * and Slave(s) |
| * |
| * @m_rt: Master stream runtime |
| */ |
| static int sdw_program_port_params(struct sdw_master_runtime *m_rt) |
| { |
| struct sdw_slave_runtime *s_rt; |
| struct sdw_bus *bus = m_rt->bus; |
| struct sdw_port_runtime *p_rt; |
| int ret = 0; |
| |
| /* Program transport & port parameters for Slave(s) */ |
| list_for_each_entry(s_rt, &m_rt->slave_rt_list, m_rt_node) { |
| list_for_each_entry(p_rt, &s_rt->port_list, port_node) { |
| ret = sdw_program_slave_port_params(bus, s_rt, p_rt); |
| if (ret < 0) |
| return ret; |
| } |
| } |
| |
| /* Program transport & port parameters for Master(s) */ |
| list_for_each_entry(p_rt, &m_rt->port_list, port_node) { |
| ret = sdw_program_master_port_params(bus, p_rt); |
| if (ret < 0) |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * sdw_enable_disable_slave_ports: Enable/disable slave data port |
| * |
| * @bus: bus instance |
| * @s_rt: slave runtime |
| * @p_rt: port runtime |
| * @en: enable or disable operation |
| * |
| * This function only sets the enable/disable bits in the relevant bank, the |
| * actual enable/disable is done with a bank switch |
| */ |
| static int sdw_enable_disable_slave_ports(struct sdw_bus *bus, |
| struct sdw_slave_runtime *s_rt, |
| struct sdw_port_runtime *p_rt, |
| bool en) |
| { |
| struct sdw_transport_params *t_params = &p_rt->transport_params; |
| u32 addr; |
| int ret; |
| |
| if (bus->params.next_bank) |
| addr = SDW_DPN_CHANNELEN_B1(p_rt->num); |
| else |
| addr = SDW_DPN_CHANNELEN_B0(p_rt->num); |
| |
| /* |
| * Since bus doesn't support sharing a port across two streams, |
| * it is safe to reset this register |
| */ |
| if (en) |
| ret = sdw_write(s_rt->slave, addr, p_rt->ch_mask); |
| else |
| ret = sdw_write(s_rt->slave, addr, 0x0); |
| |
| if (ret < 0) |
| dev_err(&s_rt->slave->dev, |
| "Slave chn_en reg write failed:%d port:%d\n", |
| ret, t_params->port_num); |
| |
| return ret; |
| } |
| |
| static int sdw_enable_disable_master_ports(struct sdw_master_runtime *m_rt, |
| struct sdw_port_runtime *p_rt, |
| bool en) |
| { |
| struct sdw_transport_params *t_params = &p_rt->transport_params; |
| struct sdw_bus *bus = m_rt->bus; |
| struct sdw_enable_ch enable_ch; |
| int ret; |
| |
| enable_ch.port_num = p_rt->num; |
| enable_ch.ch_mask = p_rt->ch_mask; |
| enable_ch.enable = en; |
| |
| /* Perform Master port channel(s) enable/disable */ |
| if (bus->port_ops->dpn_port_enable_ch) { |
| ret = bus->port_ops->dpn_port_enable_ch(bus, |
| &enable_ch, |
| bus->params.next_bank); |
| if (ret < 0) { |
| dev_err(bus->dev, |
| "Master chn_en write failed:%d port:%d\n", |
| ret, t_params->port_num); |
| return ret; |
| } |
| } else { |
| dev_err(bus->dev, |
| "dpn_port_enable_ch not supported, %s failed\n", |
| en ? "enable" : "disable"); |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * sdw_enable_disable_ports() - Enable/disable port(s) for Master and |
| * Slave(s) |
| * |
| * @m_rt: Master stream runtime |
| * @en: mode (enable/disable) |
| */ |
| static int sdw_enable_disable_ports(struct sdw_master_runtime *m_rt, bool en) |
| { |
| struct sdw_port_runtime *s_port, *m_port; |
| struct sdw_slave_runtime *s_rt; |
| int ret = 0; |
| |
| /* Enable/Disable Slave port(s) */ |
| list_for_each_entry(s_rt, &m_rt->slave_rt_list, m_rt_node) { |
| list_for_each_entry(s_port, &s_rt->port_list, port_node) { |
| ret = sdw_enable_disable_slave_ports(m_rt->bus, s_rt, |
| s_port, en); |
| if (ret < 0) |
| return ret; |
| } |
| } |
| |
| /* Enable/Disable Master port(s) */ |
| list_for_each_entry(m_port, &m_rt->port_list, port_node) { |
| ret = sdw_enable_disable_master_ports(m_rt, m_port, en); |
| if (ret < 0) |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| static int sdw_do_port_prep(struct sdw_slave_runtime *s_rt, |
| struct sdw_prepare_ch prep_ch, |
| enum sdw_port_prep_ops cmd) |
| { |
| const struct sdw_slave_ops *ops = s_rt->slave->ops; |
| int ret; |
| |
| if (ops->port_prep) { |
| ret = ops->port_prep(s_rt->slave, &prep_ch, cmd); |
| if (ret < 0) { |
| dev_err(&s_rt->slave->dev, |
| "Slave Port Prep cmd %d failed: %d\n", |
| cmd, ret); |
| return ret; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int sdw_prep_deprep_slave_ports(struct sdw_bus *bus, |
| struct sdw_slave_runtime *s_rt, |
| struct sdw_port_runtime *p_rt, |
| bool prep) |
| { |
| struct completion *port_ready; |
| struct sdw_dpn_prop *dpn_prop; |
| struct sdw_prepare_ch prep_ch; |
| bool intr = false; |
| int ret = 0, val; |
| u32 addr; |
| |
| prep_ch.num = p_rt->num; |
| prep_ch.ch_mask = p_rt->ch_mask; |
| |
| dpn_prop = sdw_get_slave_dpn_prop(s_rt->slave, |
| s_rt->direction, |
| prep_ch.num); |
| if (!dpn_prop) { |
| dev_err(bus->dev, |
| "Slave Port:%d properties not found\n", prep_ch.num); |
| return -EINVAL; |
| } |
| |
| prep_ch.prepare = prep; |
| |
| prep_ch.bank = bus->params.next_bank; |
| |
| if (dpn_prop->imp_def_interrupts || !dpn_prop->simple_ch_prep_sm || |
| bus->params.s_data_mode != SDW_PORT_DATA_MODE_NORMAL) |
| intr = true; |
| |
| /* |
| * Enable interrupt before Port prepare. |
| * For Port de-prepare, it is assumed that port |
| * was prepared earlier |
| */ |
| if (prep && intr) { |
| ret = sdw_configure_dpn_intr(s_rt->slave, p_rt->num, prep, |
| dpn_prop->imp_def_interrupts); |
| if (ret < 0) |
| return ret; |
| } |
| |
| /* Inform slave about the impending port prepare */ |
| sdw_do_port_prep(s_rt, prep_ch, SDW_OPS_PORT_PRE_PREP); |
| |
| /* Prepare Slave port implementing CP_SM */ |
| if (!dpn_prop->simple_ch_prep_sm) { |
| addr = SDW_DPN_PREPARECTRL(p_rt->num); |
| |
| if (prep) |
| ret = sdw_write(s_rt->slave, addr, p_rt->ch_mask); |
| else |
| ret = sdw_write(s_rt->slave, addr, 0x0); |
| |
| if (ret < 0) { |
| dev_err(&s_rt->slave->dev, |
| "Slave prep_ctrl reg write failed\n"); |
| return ret; |
| } |
| |
| /* Wait for completion on port ready */ |
| port_ready = &s_rt->slave->port_ready[prep_ch.num]; |
| wait_for_completion_timeout(port_ready, |
| msecs_to_jiffies(dpn_prop->ch_prep_timeout)); |
| |
| val = sdw_read(s_rt->slave, SDW_DPN_PREPARESTATUS(p_rt->num)); |
| if ((val < 0) || (val & p_rt->ch_mask)) { |
| ret = (val < 0) ? val : -ETIMEDOUT; |
| dev_err(&s_rt->slave->dev, |
| "Chn prep failed for port %d: %d\n", prep_ch.num, ret); |
| return ret; |
| } |
| } |
| |
| /* Inform slaves about ports prepared */ |
| sdw_do_port_prep(s_rt, prep_ch, SDW_OPS_PORT_POST_PREP); |
| |
| /* Disable interrupt after Port de-prepare */ |
| if (!prep && intr) |
| ret = sdw_configure_dpn_intr(s_rt->slave, p_rt->num, prep, |
| dpn_prop->imp_def_interrupts); |
| |
| return ret; |
| } |
| |
| static int sdw_prep_deprep_master_ports(struct sdw_master_runtime *m_rt, |
| struct sdw_port_runtime *p_rt, |
| bool prep) |
| { |
| struct sdw_transport_params *t_params = &p_rt->transport_params; |
| struct sdw_bus *bus = m_rt->bus; |
| const struct sdw_master_port_ops *ops = bus->port_ops; |
| struct sdw_prepare_ch prep_ch; |
| int ret = 0; |
| |
| prep_ch.num = p_rt->num; |
| prep_ch.ch_mask = p_rt->ch_mask; |
| prep_ch.prepare = prep; /* Prepare/De-prepare */ |
| prep_ch.bank = bus->params.next_bank; |
| |
| /* Pre-prepare/Pre-deprepare port(s) */ |
| if (ops->dpn_port_prep) { |
| ret = ops->dpn_port_prep(bus, &prep_ch); |
| if (ret < 0) { |
| dev_err(bus->dev, "Port prepare failed for port:%d\n", |
| t_params->port_num); |
| return ret; |
| } |
| } |
| |
| return ret; |
| } |
| |
| /** |
| * sdw_prep_deprep_ports() - Prepare/De-prepare port(s) for Master(s) and |
| * Slave(s) |
| * |
| * @m_rt: Master runtime handle |
| * @prep: Prepare or De-prepare |
| */ |
| static int sdw_prep_deprep_ports(struct sdw_master_runtime *m_rt, bool prep) |
| { |
| struct sdw_slave_runtime *s_rt; |
| struct sdw_port_runtime *p_rt; |
| int ret = 0; |
| |
| /* Prepare/De-prepare Slave port(s) */ |
| list_for_each_entry(s_rt, &m_rt->slave_rt_list, m_rt_node) { |
| list_for_each_entry(p_rt, &s_rt->port_list, port_node) { |
| ret = sdw_prep_deprep_slave_ports(m_rt->bus, s_rt, |
| p_rt, prep); |
| if (ret < 0) |
| return ret; |
| } |
| } |
| |
| /* Prepare/De-prepare Master port(s) */ |
| list_for_each_entry(p_rt, &m_rt->port_list, port_node) { |
| ret = sdw_prep_deprep_master_ports(m_rt, p_rt, prep); |
| if (ret < 0) |
| return ret; |
| } |
| |
| return ret; |
| } |
| |
| /** |
| * sdw_notify_config() - Notify bus configuration |
| * |
| * @m_rt: Master runtime handle |
| * |
| * This function notifies the Master(s) and Slave(s) of the |
| * new bus configuration. |
| */ |
| static int sdw_notify_config(struct sdw_master_runtime *m_rt) |
| { |
| struct sdw_slave_runtime *s_rt; |
| struct sdw_bus *bus = m_rt->bus; |
| struct sdw_slave *slave; |
| int ret = 0; |
| |
| if (bus->ops->set_bus_conf) { |
| ret = bus->ops->set_bus_conf(bus, &bus->params); |
| if (ret < 0) |
| return ret; |
| } |
| |
| list_for_each_entry(s_rt, &m_rt->slave_rt_list, m_rt_node) { |
| slave = s_rt->slave; |
| |
| if (slave->ops->bus_config) { |
| ret = slave->ops->bus_config(slave, &bus->params); |
| if (ret < 0) { |
| dev_err(bus->dev, "Notify Slave: %d failed\n", |
| slave->dev_num); |
| return ret; |
| } |
| } |
| } |
| |
| return ret; |
| } |
| |
| /** |
| * sdw_program_params() - Program transport and port parameters for Master(s) |
| * and Slave(s) |
| * |
| * @bus: SDW bus instance |
| * @prepare: true if sdw_program_params() is called by _prepare. |
| */ |
| static int sdw_program_params(struct sdw_bus *bus, bool prepare) |
| { |
| struct sdw_master_runtime *m_rt; |
| int ret = 0; |
| |
| list_for_each_entry(m_rt, &bus->m_rt_list, bus_node) { |
| |
| /* |
| * this loop walks through all master runtimes for a |
| * bus, but the ports can only be configured while |
| * explicitly preparing a stream or handling an |
| * already-prepared stream otherwise. |
| */ |
| if (!prepare && |
| m_rt->stream->state == SDW_STREAM_CONFIGURED) |
| continue; |
| |
| ret = sdw_program_port_params(m_rt); |
| if (ret < 0) { |
| dev_err(bus->dev, |
| "Program transport params failed: %d\n", ret); |
| return ret; |
| } |
| |
| ret = sdw_notify_config(m_rt); |
| if (ret < 0) { |
| dev_err(bus->dev, |
| "Notify bus config failed: %d\n", ret); |
| return ret; |
| } |
| |
| /* Enable port(s) on alternate bank for all active streams */ |
| if (m_rt->stream->state != SDW_STREAM_ENABLED) |
| continue; |
| |
| ret = sdw_enable_disable_ports(m_rt, true); |
| if (ret < 0) { |
| dev_err(bus->dev, "Enable channel failed: %d\n", ret); |
| return ret; |
| } |
| } |
| |
| return ret; |
| } |
| |
| static int sdw_bank_switch(struct sdw_bus *bus, int m_rt_count) |
| { |
| int col_index, row_index; |
| bool multi_link; |
| struct sdw_msg *wr_msg; |
| u8 *wbuf; |
| int ret; |
| u16 addr; |
| |
| wr_msg = kzalloc(sizeof(*wr_msg), GFP_KERNEL); |
| if (!wr_msg) |
| return -ENOMEM; |
| |
| bus->defer_msg.msg = wr_msg; |
| |
| wbuf = kzalloc(sizeof(*wbuf), GFP_KERNEL); |
| if (!wbuf) { |
| ret = -ENOMEM; |
| goto error_1; |
| } |
| |
| /* Get row and column index to program register */ |
| col_index = sdw_find_col_index(bus->params.col); |
| row_index = sdw_find_row_index(bus->params.row); |
| wbuf[0] = col_index | (row_index << 3); |
| |
| if (bus->params.next_bank) |
| addr = SDW_SCP_FRAMECTRL_B1; |
| else |
| addr = SDW_SCP_FRAMECTRL_B0; |
| |
| sdw_fill_msg(wr_msg, NULL, addr, 1, SDW_BROADCAST_DEV_NUM, |
| SDW_MSG_FLAG_WRITE, wbuf); |
| wr_msg->ssp_sync = true; |
| |
| /* |
| * Set the multi_link flag only when both the hardware supports |
| * and hardware-based sync is required |
| */ |
| multi_link = bus->multi_link && (m_rt_count >= bus->hw_sync_min_links); |
| |
| if (multi_link) |
| ret = sdw_transfer_defer(bus, wr_msg, &bus->defer_msg); |
| else |
| ret = sdw_transfer(bus, wr_msg); |
| |
| if (ret < 0 && ret != -ENODATA) { |
| dev_err(bus->dev, "Slave frame_ctrl reg write failed\n"); |
| goto error; |
| } |
| |
| if (!multi_link) { |
| kfree(wr_msg); |
| kfree(wbuf); |
| bus->defer_msg.msg = NULL; |
| bus->params.curr_bank = !bus->params.curr_bank; |
| bus->params.next_bank = !bus->params.next_bank; |
| } |
| |
| return 0; |
| |
| error: |
| kfree(wbuf); |
| error_1: |
| kfree(wr_msg); |
| bus->defer_msg.msg = NULL; |
| return ret; |
| } |
| |
| /** |
| * sdw_ml_sync_bank_switch: Multilink register bank switch |
| * |
| * @bus: SDW bus instance |
| * |
| * Caller function should free the buffers on error |
| */ |
| static int sdw_ml_sync_bank_switch(struct sdw_bus *bus) |
| { |
| unsigned long time_left; |
| |
| if (!bus->multi_link) |
| return 0; |
| |
| /* Wait for completion of transfer */ |
| time_left = wait_for_completion_timeout(&bus->defer_msg.complete, |
| bus->bank_switch_timeout); |
| |
| if (!time_left) { |
| dev_err(bus->dev, "Controller Timed out on bank switch\n"); |
| return -ETIMEDOUT; |
| } |
| |
| bus->params.curr_bank = !bus->params.curr_bank; |
| bus->params.next_bank = !bus->params.next_bank; |
| |
| if (bus->defer_msg.msg) { |
| kfree(bus->defer_msg.msg->buf); |
| kfree(bus->defer_msg.msg); |
| } |
| |
| return 0; |
| } |
| |
| static int do_bank_switch(struct sdw_stream_runtime *stream) |
| { |
| struct sdw_master_runtime *m_rt; |
| const struct sdw_master_ops *ops; |
| struct sdw_bus *bus; |
| bool multi_link = false; |
| int m_rt_count; |
| int ret = 0; |
| |
| m_rt_count = stream->m_rt_count; |
| |
| list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
| bus = m_rt->bus; |
| ops = bus->ops; |
| |
| if (bus->multi_link && m_rt_count >= bus->hw_sync_min_links) { |
| multi_link = true; |
| mutex_lock(&bus->msg_lock); |
| } |
| |
| /* Pre-bank switch */ |
| if (ops->pre_bank_switch) { |
| ret = ops->pre_bank_switch(bus); |
| if (ret < 0) { |
| dev_err(bus->dev, |
| "Pre bank switch op failed: %d\n", ret); |
| goto msg_unlock; |
| } |
| } |
| |
| /* |
| * Perform Bank switch operation. |
| * For multi link cases, the actual bank switch is |
| * synchronized across all Masters and happens later as a |
| * part of post_bank_switch ops. |
| */ |
| ret = sdw_bank_switch(bus, m_rt_count); |
| if (ret < 0) { |
| dev_err(bus->dev, "Bank switch failed: %d\n", ret); |
| goto error; |
| } |
| } |
| |
| /* |
| * For multi link cases, it is expected that the bank switch is |
| * triggered by the post_bank_switch for the first Master in the list |
| * and for the other Masters the post_bank_switch() should return doing |
| * nothing. |
| */ |
| list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
| bus = m_rt->bus; |
| ops = bus->ops; |
| |
| /* Post-bank switch */ |
| if (ops->post_bank_switch) { |
| ret = ops->post_bank_switch(bus); |
| if (ret < 0) { |
| dev_err(bus->dev, |
| "Post bank switch op failed: %d\n", |
| ret); |
| goto error; |
| } |
| } else if (multi_link) { |
| dev_err(bus->dev, |
| "Post bank switch ops not implemented\n"); |
| ret = -EINVAL; |
| goto error; |
| } |
| |
| /* Set the bank switch timeout to default, if not set */ |
| if (!bus->bank_switch_timeout) |
| bus->bank_switch_timeout = DEFAULT_BANK_SWITCH_TIMEOUT; |
| |
| /* Check if bank switch was successful */ |
| ret = sdw_ml_sync_bank_switch(bus); |
| if (ret < 0) { |
| dev_err(bus->dev, |
| "multi link bank switch failed: %d\n", ret); |
| goto error; |
| } |
| |
| if (multi_link) |
| mutex_unlock(&bus->msg_lock); |
| } |
| |
| return ret; |
| |
| error: |
| list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
| bus = m_rt->bus; |
| if (bus->defer_msg.msg) { |
| kfree(bus->defer_msg.msg->buf); |
| kfree(bus->defer_msg.msg); |
| } |
| } |
| |
| msg_unlock: |
| |
| if (multi_link) { |
| list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
| bus = m_rt->bus; |
| if (mutex_is_locked(&bus->msg_lock)) |
| mutex_unlock(&bus->msg_lock); |
| } |
| } |
| |
| return ret; |
| } |
| |
| static struct sdw_port_runtime *sdw_port_alloc(struct list_head *port_list) |
| { |
| struct sdw_port_runtime *p_rt; |
| |
| p_rt = kzalloc(sizeof(*p_rt), GFP_KERNEL); |
| if (!p_rt) |
| return NULL; |
| |
| list_add_tail(&p_rt->port_node, port_list); |
| |
| return p_rt; |
| } |
| |
| static int sdw_port_config(struct sdw_port_runtime *p_rt, |
| struct sdw_port_config *port_config, |
| int port_index) |
| { |
| p_rt->ch_mask = port_config[port_index].ch_mask; |
| p_rt->num = port_config[port_index].num; |
| |
| /* |
| * TODO: Check port capabilities for requested configuration |
| */ |
| |
| return 0; |
| } |
| |
| static void sdw_port_free(struct sdw_port_runtime *p_rt) |
| { |
| list_del(&p_rt->port_node); |
| kfree(p_rt); |
| } |
| |
| static bool sdw_slave_port_allocated(struct sdw_slave_runtime *s_rt) |
| { |
| return !list_empty(&s_rt->port_list); |
| } |
| |
| static void sdw_slave_port_free(struct sdw_slave *slave, |
| struct sdw_stream_runtime *stream) |
| { |
| struct sdw_port_runtime *p_rt, *_p_rt; |
| struct sdw_master_runtime *m_rt; |
| struct sdw_slave_runtime *s_rt; |
| |
| list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
| list_for_each_entry(s_rt, &m_rt->slave_rt_list, m_rt_node) { |
| if (s_rt->slave != slave) |
| continue; |
| |
| list_for_each_entry_safe(p_rt, _p_rt, |
| &s_rt->port_list, port_node) { |
| sdw_port_free(p_rt); |
| } |
| } |
| } |
| } |
| |
| static int sdw_slave_port_alloc(struct sdw_slave *slave, |
| struct sdw_slave_runtime *s_rt, |
| unsigned int num_config) |
| { |
| struct sdw_port_runtime *p_rt; |
| int i; |
| |
| /* Iterate for number of ports to perform initialization */ |
| for (i = 0; i < num_config; i++) { |
| p_rt = sdw_port_alloc(&s_rt->port_list); |
| if (!p_rt) |
| return -ENOMEM; |
| } |
| |
| return 0; |
| } |
| |
| static int sdw_slave_port_is_valid_range(struct device *dev, int num) |
| { |
| if (!SDW_VALID_PORT_RANGE(num)) { |
| dev_err(dev, "SoundWire: Invalid port number :%d\n", num); |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| static int sdw_slave_port_config(struct sdw_slave *slave, |
| struct sdw_slave_runtime *s_rt, |
| struct sdw_port_config *port_config) |
| { |
| struct sdw_port_runtime *p_rt; |
| int ret; |
| int i; |
| |
| i = 0; |
| list_for_each_entry(p_rt, &s_rt->port_list, port_node) { |
| /* |
| * TODO: Check valid port range as defined by DisCo/ |
| * slave |
| */ |
| ret = sdw_slave_port_is_valid_range(&slave->dev, port_config[i].num); |
| if (ret < 0) |
| return ret; |
| |
| ret = sdw_port_config(p_rt, port_config, i); |
| if (ret < 0) |
| return ret; |
| i++; |
| } |
| |
| return 0; |
| } |
| |
| static bool sdw_master_port_allocated(struct sdw_master_runtime *m_rt) |
| { |
| return !list_empty(&m_rt->port_list); |
| } |
| |
| static void sdw_master_port_free(struct sdw_master_runtime *m_rt) |
| { |
| struct sdw_port_runtime *p_rt, *_p_rt; |
| |
| list_for_each_entry_safe(p_rt, _p_rt, &m_rt->port_list, port_node) { |
| sdw_port_free(p_rt); |
| } |
| } |
| |
| static int sdw_master_port_alloc(struct sdw_master_runtime *m_rt, |
| unsigned int num_ports) |
| { |
| struct sdw_port_runtime *p_rt; |
| int i; |
| |
| /* Iterate for number of ports to perform initialization */ |
| for (i = 0; i < num_ports; i++) { |
| p_rt = sdw_port_alloc(&m_rt->port_list); |
| if (!p_rt) |
| return -ENOMEM; |
| } |
| |
| return 0; |
| } |
| |
| static int sdw_master_port_config(struct sdw_master_runtime *m_rt, |
| struct sdw_port_config *port_config) |
| { |
| struct sdw_port_runtime *p_rt; |
| int ret; |
| int i; |
| |
| i = 0; |
| list_for_each_entry(p_rt, &m_rt->port_list, port_node) { |
| ret = sdw_port_config(p_rt, port_config, i); |
| if (ret < 0) |
| return ret; |
| i++; |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * sdw_slave_rt_alloc() - Allocate a Slave runtime handle. |
| * |
| * @slave: Slave handle |
| * @m_rt: Master runtime handle |
| * |
| * This function is to be called with bus_lock held. |
| */ |
| static struct sdw_slave_runtime |
| *sdw_slave_rt_alloc(struct sdw_slave *slave, |
| struct sdw_master_runtime *m_rt) |
| { |
| struct sdw_slave_runtime *s_rt; |
| |
| s_rt = kzalloc(sizeof(*s_rt), GFP_KERNEL); |
| if (!s_rt) |
| return NULL; |
| |
| INIT_LIST_HEAD(&s_rt->port_list); |
| s_rt->slave = slave; |
| |
| list_add_tail(&s_rt->m_rt_node, &m_rt->slave_rt_list); |
| |
| return s_rt; |
| } |
| |
| /** |
| * sdw_slave_rt_config() - Configure a Slave runtime handle. |
| * |
| * @s_rt: Slave runtime handle |
| * @stream_config: Stream configuration |
| * |
| * This function is to be called with bus_lock held. |
| */ |
| static int sdw_slave_rt_config(struct sdw_slave_runtime *s_rt, |
| struct sdw_stream_config *stream_config) |
| { |
| s_rt->ch_count = stream_config->ch_count; |
| s_rt->direction = stream_config->direction; |
| |
| return 0; |
| } |
| |
| static struct sdw_slave_runtime *sdw_slave_rt_find(struct sdw_slave *slave, |
| struct sdw_stream_runtime *stream) |
| { |
| struct sdw_slave_runtime *s_rt, *_s_rt; |
| struct sdw_master_runtime *m_rt; |
| |
| list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
| /* Retrieve Slave runtime handle */ |
| list_for_each_entry_safe(s_rt, _s_rt, |
| &m_rt->slave_rt_list, m_rt_node) { |
| if (s_rt->slave == slave) |
| return s_rt; |
| } |
| } |
| return NULL; |
| } |
| |
| /** |
| * sdw_slave_rt_free() - Free Slave(s) runtime handle |
| * |
| * @slave: Slave handle. |
| * @stream: Stream runtime handle. |
| * |
| * This function is to be called with bus_lock held. |
| */ |
| static void sdw_slave_rt_free(struct sdw_slave *slave, |
| struct sdw_stream_runtime *stream) |
| { |
| struct sdw_slave_runtime *s_rt; |
| |
| s_rt = sdw_slave_rt_find(slave, stream); |
| if (s_rt) { |
| list_del(&s_rt->m_rt_node); |
| kfree(s_rt); |
| } |
| } |
| |
| static struct sdw_master_runtime |
| *sdw_master_rt_find(struct sdw_bus *bus, |
| struct sdw_stream_runtime *stream) |
| { |
| struct sdw_master_runtime *m_rt; |
| |
| /* Retrieve Bus handle if already available */ |
| list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
| if (m_rt->bus == bus) |
| return m_rt; |
| } |
| |
| return NULL; |
| } |
| |
| /** |
| * sdw_master_rt_alloc() - Allocates a Master runtime handle |
| * |
| * @bus: SDW bus instance |
| * @stream: Stream runtime handle. |
| * |
| * This function is to be called with bus_lock held. |
| */ |
| static struct sdw_master_runtime |
| *sdw_master_rt_alloc(struct sdw_bus *bus, |
| struct sdw_stream_runtime *stream) |
| { |
| struct sdw_master_runtime *m_rt; |
| |
| m_rt = kzalloc(sizeof(*m_rt), GFP_KERNEL); |
| if (!m_rt) |
| return NULL; |
| |
| /* Initialization of Master runtime handle */ |
| INIT_LIST_HEAD(&m_rt->port_list); |
| INIT_LIST_HEAD(&m_rt->slave_rt_list); |
| list_add_tail(&m_rt->stream_node, &stream->master_list); |
| |
| list_add_tail(&m_rt->bus_node, &bus->m_rt_list); |
| |
| m_rt->bus = bus; |
| m_rt->stream = stream; |
| |
| return m_rt; |
| } |
| |
| /** |
| * sdw_master_rt_config() - Configure Master runtime handle |
| * |
| * @m_rt: Master runtime handle |
| * @stream_config: Stream configuration |
| * |
| * This function is to be called with bus_lock held. |
| */ |
| |
| static int sdw_master_rt_config(struct sdw_master_runtime *m_rt, |
| struct sdw_stream_config *stream_config) |
| { |
| m_rt->ch_count = stream_config->ch_count; |
| m_rt->direction = stream_config->direction; |
| |
| return 0; |
| } |
| |
| /** |
| * sdw_master_rt_free() - Free Master runtime handle |
| * |
| * @m_rt: Master runtime node |
| * @stream: Stream runtime handle. |
| * |
| * This function is to be called with bus_lock held |
| * It frees the Master runtime handle and associated Slave(s) runtime |
| * handle. If this is called first then sdw_slave_rt_free() will have |
| * no effect as Slave(s) runtime handle would already be freed up. |
| */ |
| static void sdw_master_rt_free(struct sdw_master_runtime *m_rt, |
| struct sdw_stream_runtime *stream) |
| { |
| struct sdw_slave_runtime *s_rt, *_s_rt; |
| |
| list_for_each_entry_safe(s_rt, _s_rt, &m_rt->slave_rt_list, m_rt_node) { |
| sdw_slave_port_free(s_rt->slave, stream); |
| sdw_slave_rt_free(s_rt->slave, stream); |
| } |
| |
| list_del(&m_rt->stream_node); |
| list_del(&m_rt->bus_node); |
| kfree(m_rt); |
| } |
| |
| /** |
| * sdw_config_stream() - Configure the allocated stream |
| * |
| * @dev: SDW device |
| * @stream: SoundWire stream |
| * @stream_config: Stream configuration for audio stream |
| * @is_slave: is API called from Slave or Master |
| * |
| * This function is to be called with bus_lock held. |
| */ |
| static int sdw_config_stream(struct device *dev, |
| struct sdw_stream_runtime *stream, |
| struct sdw_stream_config *stream_config, |
| bool is_slave) |
| { |
| /* |
| * Update the stream rate, channel and bps based on data |
| * source. For more than one data source (multilink), |
| * match the rate, bps, stream type and increment number of channels. |
| * |
| * If rate/bps is zero, it means the values are not set, so skip |
| * comparison and allow the value to be set and stored in stream |
| */ |
| if (stream->params.rate && |
| stream->params.rate != stream_config->frame_rate) { |
| dev_err(dev, "rate not matching, stream:%s\n", stream->name); |
| return -EINVAL; |
| } |
| |
| if (stream->params.bps && |
| stream->params.bps != stream_config->bps) { |
| dev_err(dev, "bps not matching, stream:%s\n", stream->name); |
| return -EINVAL; |
| } |
| |
| stream->type = stream_config->type; |
| stream->params.rate = stream_config->frame_rate; |
| stream->params.bps = stream_config->bps; |
| |
| /* TODO: Update this check during Device-device support */ |
| if (is_slave) |
| stream->params.ch_count += stream_config->ch_count; |
| |
| return 0; |
| } |
| |
| /** |
| * sdw_get_slave_dpn_prop() - Get Slave port capabilities |
| * |
| * @slave: Slave handle |
| * @direction: Data direction. |
| * @port_num: Port number |
| */ |
| struct sdw_dpn_prop *sdw_get_slave_dpn_prop(struct sdw_slave *slave, |
| enum sdw_data_direction direction, |
| unsigned int port_num) |
| { |
| struct sdw_dpn_prop *dpn_prop; |
| u8 num_ports; |
| int i; |
| |
| if (direction == SDW_DATA_DIR_TX) { |
| num_ports = hweight32(slave->prop.source_ports); |
| dpn_prop = slave->prop.src_dpn_prop; |
| } else { |
| num_ports = hweight32(slave->prop.sink_ports); |
| dpn_prop = slave->prop.sink_dpn_prop; |
| } |
| |
| for (i = 0; i < num_ports; i++) { |
| if (dpn_prop[i].num == port_num) |
| return &dpn_prop[i]; |
| } |
| |
| return NULL; |
| } |
| |
| /** |
| * sdw_acquire_bus_lock: Acquire bus lock for all Master runtime(s) |
| * |
| * @stream: SoundWire stream |
| * |
| * Acquire bus_lock for each of the master runtime(m_rt) part of this |
| * stream to reconfigure the bus. |
| * NOTE: This function is called from SoundWire stream ops and is |
| * expected that a global lock is held before acquiring bus_lock. |
| */ |
| static void sdw_acquire_bus_lock(struct sdw_stream_runtime *stream) |
| { |
| struct sdw_master_runtime *m_rt; |
| struct sdw_bus *bus; |
| |
| /* Iterate for all Master(s) in Master list */ |
| list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
| bus = m_rt->bus; |
| |
| mutex_lock(&bus->bus_lock); |
| } |
| } |
| |
| /** |
| * sdw_release_bus_lock: Release bus lock for all Master runtime(s) |
| * |
| * @stream: SoundWire stream |
| * |
| * Release the previously held bus_lock after reconfiguring the bus. |
| * NOTE: This function is called from SoundWire stream ops and is |
| * expected that a global lock is held before releasing bus_lock. |
| */ |
| static void sdw_release_bus_lock(struct sdw_stream_runtime *stream) |
| { |
| struct sdw_master_runtime *m_rt; |
| struct sdw_bus *bus; |
| |
| /* Iterate for all Master(s) in Master list */ |
| list_for_each_entry_reverse(m_rt, &stream->master_list, stream_node) { |
| bus = m_rt->bus; |
| mutex_unlock(&bus->bus_lock); |
| } |
| } |
| |
| static int _sdw_prepare_stream(struct sdw_stream_runtime *stream, |
| bool update_params) |
| { |
| struct sdw_master_runtime *m_rt; |
| struct sdw_bus *bus = NULL; |
| struct sdw_master_prop *prop; |
| struct sdw_bus_params params; |
| int ret; |
| |
| /* Prepare Master(s) and Slave(s) port(s) associated with stream */ |
| list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
| bus = m_rt->bus; |
| prop = &bus->prop; |
| memcpy(¶ms, &bus->params, sizeof(params)); |
| |
| /* TODO: Support Asynchronous mode */ |
| if ((prop->max_clk_freq % stream->params.rate) != 0) { |
| dev_err(bus->dev, "Async mode not supported\n"); |
| return -EINVAL; |
| } |
| |
| if (!update_params) |
| goto program_params; |
| |
| /* Increment cumulative bus bandwidth */ |
| /* TODO: Update this during Device-Device support */ |
| bus->params.bandwidth += m_rt->stream->params.rate * |
| m_rt->ch_count * m_rt->stream->params.bps; |
| |
| /* Compute params */ |
| if (bus->compute_params) { |
| ret = bus->compute_params(bus); |
| if (ret < 0) { |
| dev_err(bus->dev, "Compute params failed: %d\n", |
| ret); |
| return ret; |
| } |
| } |
| |
| program_params: |
| /* Program params */ |
| ret = sdw_program_params(bus, true); |
| if (ret < 0) { |
| dev_err(bus->dev, "Program params failed: %d\n", ret); |
| goto restore_params; |
| } |
| } |
| |
| if (!bus) { |
| pr_err("Configuration error in %s\n", __func__); |
| return -EINVAL; |
| } |
| |
| ret = do_bank_switch(stream); |
| if (ret < 0) { |
| dev_err(bus->dev, "Bank switch failed: %d\n", ret); |
| goto restore_params; |
| } |
| |
| list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
| bus = m_rt->bus; |
| |
| /* Prepare port(s) on the new clock configuration */ |
| ret = sdw_prep_deprep_ports(m_rt, true); |
| if (ret < 0) { |
| dev_err(bus->dev, "Prepare port(s) failed ret = %d\n", |
| ret); |
| return ret; |
| } |
| } |
| |
| stream->state = SDW_STREAM_PREPARED; |
| |
| return ret; |
| |
| restore_params: |
| memcpy(&bus->params, ¶ms, sizeof(params)); |
| return ret; |
| } |
| |
| /** |
| * sdw_prepare_stream() - Prepare SoundWire stream |
| * |
| * @stream: Soundwire stream |
| * |
| * Documentation/driver-api/soundwire/stream.rst explains this API in detail |
| */ |
| int sdw_prepare_stream(struct sdw_stream_runtime *stream) |
| { |
| bool update_params = true; |
| int ret; |
| |
| if (!stream) { |
| pr_err("SoundWire: Handle not found for stream\n"); |
| return -EINVAL; |
| } |
| |
| sdw_acquire_bus_lock(stream); |
| |
| if (stream->state == SDW_STREAM_PREPARED) { |
| ret = 0; |
| goto state_err; |
| } |
| |
| if (stream->state != SDW_STREAM_CONFIGURED && |
| stream->state != SDW_STREAM_DEPREPARED && |
| stream->state != SDW_STREAM_DISABLED) { |
| pr_err("%s: %s: inconsistent state state %d\n", |
| __func__, stream->name, stream->state); |
| ret = -EINVAL; |
| goto state_err; |
| } |
| |
| /* |
| * when the stream is DISABLED, this means sdw_prepare_stream() |
| * is called as a result of an underflow or a resume operation. |
| * In this case, the bus parameters shall not be recomputed, but |
| * still need to be re-applied |
| */ |
| if (stream->state == SDW_STREAM_DISABLED) |
| update_params = false; |
| |
| ret = _sdw_prepare_stream(stream, update_params); |
| |
| state_err: |
| sdw_release_bus_lock(stream); |
| return ret; |
| } |
| EXPORT_SYMBOL(sdw_prepare_stream); |
| |
| static int _sdw_enable_stream(struct sdw_stream_runtime *stream) |
| { |
| struct sdw_master_runtime *m_rt; |
| struct sdw_bus *bus = NULL; |
| int ret; |
| |
| /* Enable Master(s) and Slave(s) port(s) associated with stream */ |
| list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
| bus = m_rt->bus; |
| |
| /* Program params */ |
| ret = sdw_program_params(bus, false); |
| if (ret < 0) { |
| dev_err(bus->dev, "Program params failed: %d\n", ret); |
| return ret; |
| } |
| |
| /* Enable port(s) */ |
| ret = sdw_enable_disable_ports(m_rt, true); |
| if (ret < 0) { |
| dev_err(bus->dev, |
| "Enable port(s) failed ret: %d\n", ret); |
| return ret; |
| } |
| } |
| |
| if (!bus) { |
| pr_err("Configuration error in %s\n", __func__); |
| return -EINVAL; |
| } |
| |
| ret = do_bank_switch(stream); |
| if (ret < 0) { |
| dev_err(bus->dev, "Bank switch failed: %d\n", ret); |
| return ret; |
| } |
| |
| stream->state = SDW_STREAM_ENABLED; |
| return 0; |
| } |
| |
| /** |
| * sdw_enable_stream() - Enable SoundWire stream |
| * |
| * @stream: Soundwire stream |
| * |
| * Documentation/driver-api/soundwire/stream.rst explains this API in detail |
| */ |
| int sdw_enable_stream(struct sdw_stream_runtime *stream) |
| { |
| int ret; |
| |
| if (!stream) { |
| pr_err("SoundWire: Handle not found for stream\n"); |
| return -EINVAL; |
| } |
| |
| sdw_acquire_bus_lock(stream); |
| |
| if (stream->state == SDW_STREAM_ENABLED) { |
| ret = 0; |
| goto state_err; |
| } |
| |
| if (stream->state != SDW_STREAM_PREPARED && |
| stream->state != SDW_STREAM_DISABLED) { |
| pr_err("%s: %s: inconsistent state state %d\n", |
| __func__, stream->name, stream->state); |
| ret = -EINVAL; |
| goto state_err; |
| } |
| |
| ret = _sdw_enable_stream(stream); |
| |
| state_err: |
| sdw_release_bus_lock(stream); |
| return ret; |
| } |
| EXPORT_SYMBOL(sdw_enable_stream); |
| |
| static int _sdw_disable_stream(struct sdw_stream_runtime *stream) |
| { |
| struct sdw_master_runtime *m_rt; |
| int ret; |
| |
| list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
| struct sdw_bus *bus = m_rt->bus; |
| |
| /* Disable port(s) */ |
| ret = sdw_enable_disable_ports(m_rt, false); |
| if (ret < 0) { |
| dev_err(bus->dev, "Disable port(s) failed: %d\n", ret); |
| return ret; |
| } |
| } |
| stream->state = SDW_STREAM_DISABLED; |
| |
| list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
| struct sdw_bus *bus = m_rt->bus; |
| |
| /* Program params */ |
| ret = sdw_program_params(bus, false); |
| if (ret < 0) { |
| dev_err(bus->dev, "Program params failed: %d\n", ret); |
| return ret; |
| } |
| } |
| |
| ret = do_bank_switch(stream); |
| if (ret < 0) { |
| pr_err("Bank switch failed: %d\n", ret); |
| return ret; |
| } |
| |
| /* make sure alternate bank (previous current) is also disabled */ |
| list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
| struct sdw_bus *bus = m_rt->bus; |
| |
| /* Disable port(s) */ |
| ret = sdw_enable_disable_ports(m_rt, false); |
| if (ret < 0) { |
| dev_err(bus->dev, "Disable port(s) failed: %d\n", ret); |
| return ret; |
| } |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * sdw_disable_stream() - Disable SoundWire stream |
| * |
| * @stream: Soundwire stream |
| * |
| * Documentation/driver-api/soundwire/stream.rst explains this API in detail |
| */ |
| int sdw_disable_stream(struct sdw_stream_runtime *stream) |
| { |
| int ret; |
| |
| if (!stream) { |
| pr_err("SoundWire: Handle not found for stream\n"); |
| return -EINVAL; |
| } |
| |
| sdw_acquire_bus_lock(stream); |
| |
| if (stream->state == SDW_STREAM_DISABLED) { |
| ret = 0; |
| goto state_err; |
| } |
| |
| if (stream->state != SDW_STREAM_ENABLED) { |
| pr_err("%s: %s: inconsistent state state %d\n", |
| __func__, stream->name, stream->state); |
| ret = -EINVAL; |
| goto state_err; |
| } |
| |
| ret = _sdw_disable_stream(stream); |
| |
| state_err: |
| sdw_release_bus_lock(stream); |
| return ret; |
| } |
| EXPORT_SYMBOL(sdw_disable_stream); |
| |
| static int _sdw_deprepare_stream(struct sdw_stream_runtime *stream) |
| { |
| struct sdw_master_runtime *m_rt; |
| struct sdw_bus *bus; |
| int ret = 0; |
| |
| list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
| bus = m_rt->bus; |
| /* De-prepare port(s) */ |
| ret = sdw_prep_deprep_ports(m_rt, false); |
| if (ret < 0) { |
| dev_err(bus->dev, |
| "De-prepare port(s) failed: %d\n", ret); |
| return ret; |
| } |
| |
| /* TODO: Update this during Device-Device support */ |
| bus->params.bandwidth -= m_rt->stream->params.rate * |
| m_rt->ch_count * m_rt->stream->params.bps; |
| |
| /* Compute params */ |
| if (bus->compute_params) { |
| ret = bus->compute_params(bus); |
| if (ret < 0) { |
| dev_err(bus->dev, "Compute params failed: %d\n", |
| ret); |
| return ret; |
| } |
| } |
| |
| /* Program params */ |
| ret = sdw_program_params(bus, false); |
| if (ret < 0) { |
| dev_err(bus->dev, "Program params failed: %d\n", ret); |
| return ret; |
| } |
| } |
| |
| stream->state = SDW_STREAM_DEPREPARED; |
| return do_bank_switch(stream); |
| } |
| |
| /** |
| * sdw_deprepare_stream() - Deprepare SoundWire stream |
| * |
| * @stream: Soundwire stream |
| * |
| * Documentation/driver-api/soundwire/stream.rst explains this API in detail |
| */ |
| int sdw_deprepare_stream(struct sdw_stream_runtime *stream) |
| { |
| int ret; |
| |
| if (!stream) { |
| pr_err("SoundWire: Handle not found for stream\n"); |
| return -EINVAL; |
| } |
| |
| sdw_acquire_bus_lock(stream); |
| |
| if (stream->state == SDW_STREAM_DEPREPARED) { |
| ret = 0; |
| goto state_err; |
| } |
| |
| if (stream->state != SDW_STREAM_PREPARED && |
| stream->state != SDW_STREAM_DISABLED) { |
| pr_err("%s: %s: inconsistent state state %d\n", |
| __func__, stream->name, stream->state); |
| ret = -EINVAL; |
| goto state_err; |
| } |
| |
| ret = _sdw_deprepare_stream(stream); |
| |
| state_err: |
| sdw_release_bus_lock(stream); |
| return ret; |
| } |
| EXPORT_SYMBOL(sdw_deprepare_stream); |
| |
| static int set_stream(struct snd_pcm_substream *substream, |
| struct sdw_stream_runtime *sdw_stream) |
| { |
| struct snd_soc_pcm_runtime *rtd = substream->private_data; |
| struct snd_soc_dai *dai; |
| int ret = 0; |
| int i; |
| |
| /* Set stream pointer on all DAIs */ |
| for_each_rtd_dais(rtd, i, dai) { |
| ret = snd_soc_dai_set_stream(dai, sdw_stream, substream->stream); |
| if (ret < 0) { |
| dev_err(rtd->dev, "failed to set stream pointer on dai %s\n", dai->name); |
| break; |
| } |
| } |
| |
| return ret; |
| } |
| |
| /** |
| * sdw_alloc_stream() - Allocate and return stream runtime |
| * |
| * @stream_name: SoundWire stream name |
| * |
| * Allocates a SoundWire stream runtime instance. |
| * sdw_alloc_stream should be called only once per stream. Typically |
| * invoked from ALSA/ASoC machine/platform driver. |
| */ |
| struct sdw_stream_runtime *sdw_alloc_stream(const char *stream_name) |
| { |
| struct sdw_stream_runtime *stream; |
| |
| stream = kzalloc(sizeof(*stream), GFP_KERNEL); |
| if (!stream) |
| return NULL; |
| |
| stream->name = stream_name; |
| INIT_LIST_HEAD(&stream->master_list); |
| stream->state = SDW_STREAM_ALLOCATED; |
| stream->m_rt_count = 0; |
| |
| return stream; |
| } |
| EXPORT_SYMBOL(sdw_alloc_stream); |
| |
| /** |
| * sdw_startup_stream() - Startup SoundWire stream |
| * |
| * @sdw_substream: Soundwire stream |
| * |
| * Documentation/driver-api/soundwire/stream.rst explains this API in detail |
| */ |
| int sdw_startup_stream(void *sdw_substream) |
| { |
| struct snd_pcm_substream *substream = sdw_substream; |
| struct snd_soc_pcm_runtime *rtd = substream->private_data; |
| struct sdw_stream_runtime *sdw_stream; |
| char *name; |
| int ret; |
| |
| if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
| name = kasprintf(GFP_KERNEL, "%s-Playback", substream->name); |
| else |
| name = kasprintf(GFP_KERNEL, "%s-Capture", substream->name); |
| |
| if (!name) |
| return -ENOMEM; |
| |
| sdw_stream = sdw_alloc_stream(name); |
| if (!sdw_stream) { |
| dev_err(rtd->dev, "alloc stream failed for substream DAI %s\n", substream->name); |
| ret = -ENOMEM; |
| goto error; |
| } |
| |
| ret = set_stream(substream, sdw_stream); |
| if (ret < 0) |
| goto release_stream; |
| return 0; |
| |
| release_stream: |
| sdw_release_stream(sdw_stream); |
| set_stream(substream, NULL); |
| error: |
| kfree(name); |
| return ret; |
| } |
| EXPORT_SYMBOL(sdw_startup_stream); |
| |
| /** |
| * sdw_shutdown_stream() - Shutdown SoundWire stream |
| * |
| * @sdw_substream: Soundwire stream |
| * |
| * Documentation/driver-api/soundwire/stream.rst explains this API in detail |
| */ |
| void sdw_shutdown_stream(void *sdw_substream) |
| { |
| struct snd_pcm_substream *substream = sdw_substream; |
| struct snd_soc_pcm_runtime *rtd = substream->private_data; |
| struct sdw_stream_runtime *sdw_stream; |
| struct snd_soc_dai *dai; |
| |
| /* Find stream from first CPU DAI */ |
| dai = asoc_rtd_to_cpu(rtd, 0); |
| |
| sdw_stream = snd_soc_dai_get_stream(dai, substream->stream); |
| |
| if (IS_ERR(sdw_stream)) { |
| dev_err(rtd->dev, "no stream found for DAI %s\n", dai->name); |
| return; |
| } |
| |
| /* release memory */ |
| kfree(sdw_stream->name); |
| sdw_release_stream(sdw_stream); |
| |
| /* clear DAI data */ |
| set_stream(substream, NULL); |
| } |
| EXPORT_SYMBOL(sdw_shutdown_stream); |
| |
| /** |
| * sdw_release_stream() - Free the assigned stream runtime |
| * |
| * @stream: SoundWire stream runtime |
| * |
| * sdw_release_stream should be called only once per stream |
| */ |
| void sdw_release_stream(struct sdw_stream_runtime *stream) |
| { |
| kfree(stream); |
| } |
| EXPORT_SYMBOL(sdw_release_stream); |
| |
| /** |
| * sdw_stream_add_master() - Allocate and add master runtime to a stream |
| * |
| * @bus: SDW Bus instance |
| * @stream_config: Stream configuration for audio stream |
| * @port_config: Port configuration for audio stream |
| * @num_ports: Number of ports |
| * @stream: SoundWire stream |
| */ |
| int sdw_stream_add_master(struct sdw_bus *bus, |
| struct sdw_stream_config *stream_config, |
| struct sdw_port_config *port_config, |
| unsigned int num_ports, |
| struct sdw_stream_runtime *stream) |
| { |
| struct sdw_master_runtime *m_rt; |
| bool alloc_master_rt = true; |
| int ret; |
| |
| mutex_lock(&bus->bus_lock); |
| |
| /* |
| * For multi link streams, add the second master only if |
| * the bus supports it. |
| * Check if bus->multi_link is set |
| */ |
| if (!bus->multi_link && stream->m_rt_count > 0) { |
| dev_err(bus->dev, |
| "Multilink not supported, link %d\n", bus->link_id); |
| ret = -EINVAL; |
| goto unlock; |
| } |
| |
| /* |
| * check if Master is already allocated (e.g. as a result of Slave adding |
| * it first), if so skip allocation and go to configuration |
| */ |
| m_rt = sdw_master_rt_find(bus, stream); |
| if (m_rt) { |
| alloc_master_rt = false; |
| goto skip_alloc_master_rt; |
| } |
| |
| m_rt = sdw_master_rt_alloc(bus, stream); |
| if (!m_rt) { |
| dev_err(bus->dev, "Master runtime alloc failed for stream:%s\n", stream->name); |
| ret = -ENOMEM; |
| goto unlock; |
| } |
| skip_alloc_master_rt: |
| |
| if (sdw_master_port_allocated(m_rt)) |
| goto skip_alloc_master_port; |
| |
| ret = sdw_master_port_alloc(m_rt, num_ports); |
| if (ret) |
| goto alloc_error; |
| |
| stream->m_rt_count++; |
| |
| skip_alloc_master_port: |
| |
| ret = sdw_master_rt_config(m_rt, stream_config); |
| if (ret < 0) |
| goto unlock; |
| |
| ret = sdw_config_stream(bus->dev, stream, stream_config, false); |
| if (ret) |
| goto unlock; |
| |
| ret = sdw_master_port_config(m_rt, port_config); |
| |
| goto unlock; |
| |
| alloc_error: |
| /* |
| * we only cleanup what was allocated in this routine |
| */ |
| if (alloc_master_rt) |
| sdw_master_rt_free(m_rt, stream); |
| unlock: |
| mutex_unlock(&bus->bus_lock); |
| return ret; |
| } |
| EXPORT_SYMBOL(sdw_stream_add_master); |
| |
| /** |
| * sdw_stream_remove_master() - Remove master from sdw_stream |
| * |
| * @bus: SDW Bus instance |
| * @stream: SoundWire stream |
| * |
| * This removes and frees port_rt and master_rt from a stream |
| */ |
| int sdw_stream_remove_master(struct sdw_bus *bus, |
| struct sdw_stream_runtime *stream) |
| { |
| struct sdw_master_runtime *m_rt, *_m_rt; |
| |
| mutex_lock(&bus->bus_lock); |
| |
| list_for_each_entry_safe(m_rt, _m_rt, |
| &stream->master_list, stream_node) { |
| if (m_rt->bus != bus) |
| continue; |
| |
| sdw_master_port_free(m_rt); |
| sdw_master_rt_free(m_rt, stream); |
| stream->m_rt_count--; |
| } |
| |
| if (list_empty(&stream->master_list)) |
| stream->state = SDW_STREAM_RELEASED; |
| |
| mutex_unlock(&bus->bus_lock); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(sdw_stream_remove_master); |
| |
| /** |
| * sdw_stream_add_slave() - Allocate and add master/slave runtime to a stream |
| * |
| * @slave: SDW Slave instance |
| * @stream_config: Stream configuration for audio stream |
| * @stream: SoundWire stream |
| * @port_config: Port configuration for audio stream |
| * @num_ports: Number of ports |
| * |
| * It is expected that Slave is added before adding Master |
| * to the Stream. |
| * |
| */ |
| int sdw_stream_add_slave(struct sdw_slave *slave, |
| struct sdw_stream_config *stream_config, |
| struct sdw_port_config *port_config, |
| unsigned int num_ports, |
| struct sdw_stream_runtime *stream) |
| { |
| struct sdw_slave_runtime *s_rt; |
| struct sdw_master_runtime *m_rt; |
| bool alloc_master_rt = true; |
| bool alloc_slave_rt = true; |
| |
| int ret; |
| |
| mutex_lock(&slave->bus->bus_lock); |
| |
| /* |
| * check if Master is already allocated, if so skip allocation |
| * and go to configuration |
| */ |
| m_rt = sdw_master_rt_find(slave->bus, stream); |
| if (m_rt) { |
| alloc_master_rt = false; |
| goto skip_alloc_master_rt; |
| } |
| |
| /* |
| * If this API is invoked by Slave first then m_rt is not valid. |
| * So, allocate m_rt and add Slave to it. |
| */ |
| m_rt = sdw_master_rt_alloc(slave->bus, stream); |
| if (!m_rt) { |
| dev_err(&slave->dev, "Master runtime alloc failed for stream:%s\n", stream->name); |
| ret = -ENOMEM; |
| goto unlock; |
| } |
| |
| skip_alloc_master_rt: |
| s_rt = sdw_slave_rt_find(slave, stream); |
| if (s_rt) |
| goto skip_alloc_slave_rt; |
| |
| s_rt = sdw_slave_rt_alloc(slave, m_rt); |
| if (!s_rt) { |
| dev_err(&slave->dev, "Slave runtime alloc failed for stream:%s\n", stream->name); |
| alloc_slave_rt = false; |
| ret = -ENOMEM; |
| goto alloc_error; |
| } |
| |
| skip_alloc_slave_rt: |
| if (sdw_slave_port_allocated(s_rt)) |
| goto skip_port_alloc; |
| |
| ret = sdw_slave_port_alloc(slave, s_rt, num_ports); |
| if (ret) |
| goto alloc_error; |
| |
| skip_port_alloc: |
| ret = sdw_master_rt_config(m_rt, stream_config); |
| if (ret) |
| goto unlock; |
| |
| ret = sdw_slave_rt_config(s_rt, stream_config); |
| if (ret) |
| goto unlock; |
| |
| ret = sdw_config_stream(&slave->dev, stream, stream_config, true); |
| if (ret) |
| goto unlock; |
| |
| ret = sdw_slave_port_config(slave, s_rt, port_config); |
| if (ret) |
| goto unlock; |
| |
| /* |
| * Change stream state to CONFIGURED on first Slave add. |
| * Bus is not aware of number of Slave(s) in a stream at this |
| * point so cannot depend on all Slave(s) to be added in order to |
| * change stream state to CONFIGURED. |
| */ |
| stream->state = SDW_STREAM_CONFIGURED; |
| goto unlock; |
| |
| alloc_error: |
| /* |
| * we only cleanup what was allocated in this routine. The 'else if' |
| * is intentional, the 'master_rt_free' will call sdw_slave_rt_free() |
| * internally. |
| */ |
| if (alloc_master_rt) |
| sdw_master_rt_free(m_rt, stream); |
| else if (alloc_slave_rt) |
| sdw_slave_rt_free(slave, stream); |
| unlock: |
| mutex_unlock(&slave->bus->bus_lock); |
| return ret; |
| } |
| EXPORT_SYMBOL(sdw_stream_add_slave); |
| |
| /** |
| * sdw_stream_remove_slave() - Remove slave from sdw_stream |
| * |
| * @slave: SDW Slave instance |
| * @stream: SoundWire stream |
| * |
| * This removes and frees port_rt and slave_rt from a stream |
| */ |
| int sdw_stream_remove_slave(struct sdw_slave *slave, |
| struct sdw_stream_runtime *stream) |
| { |
| mutex_lock(&slave->bus->bus_lock); |
| |
| sdw_slave_port_free(slave, stream); |
| sdw_slave_rt_free(slave, stream); |
| |
| mutex_unlock(&slave->bus->bus_lock); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(sdw_stream_remove_slave); |