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soundwire: qcom: add support for SoundWire controller 

Qualcomm SoundWire Master controller is present in most Qualcomm SoCs
either integrated as part of WCD audio codecs via slimbus or
as part of SOC I/O.

This patchset adds support to a very basic controller which has been
tested with WCD934x SoundWire controller connected to WSA881x smart
speaker amplifiers.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20200113132153.27239-3-srinivas.kandagatla@linaro.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Srinivas Kandagatla 2020-01-13 13:21:53 +00:00 committed by Vinod Koul
parent bbd8e6672f
commit 02efb49aa8
3 changed files with 874 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
drivers/soundwire/Kconfig
View File

@ -31,4 +31,13 @@ config SOUNDWIRE_INTEL
enable this config option to get the SoundWire support for that
device.
config SOUNDWIRE_QCOM
tristate "Qualcomm SoundWire Master driver"
depends on SLIMBUS
depends on SND_SOC
help
SoundWire Qualcomm Master driver.
If you have an Qualcomm platform which has a SoundWire Master then
enable this config option to get the SoundWire support for that
device
endif

4
drivers/soundwire/Makefile
View File

@ -21,3 +21,7 @@ obj-$(CONFIG_SOUNDWIRE_INTEL) += soundwire-intel.o
soundwire-intel-init-objs := intel_init.o
obj-$(CONFIG_SOUNDWIRE_INTEL) += soundwire-intel-init.o
#Qualcomm driver
soundwire-qcom-objs := qcom.o
obj-$(CONFIG_SOUNDWIRE_QCOM) += soundwire-qcom.o

861
drivers/soundwire/qcom.c Normal file
View File

@ -0,0 +1,861 @@
// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2019, Linaro Limited
#include <linux/clk.h>
#include <linux/completion.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_irq.h>
#include <linux/of_device.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <linux/slimbus.h>
#include <linux/soundwire/sdw.h>
#include <linux/soundwire/sdw_registers.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include "bus.h"
#define SWRM_COMP_HW_VERSION 0x00
#define SWRM_COMP_CFG_ADDR 0x04
#define SWRM_COMP_CFG_IRQ_LEVEL_OR_PULSE_MSK BIT(1)
#define SWRM_COMP_CFG_ENABLE_MSK BIT(0)
#define SWRM_COMP_PARAMS 0x100
#define SWRM_COMP_PARAMS_DOUT_PORTS_MASK GENMASK(4, 0)
#define SWRM_COMP_PARAMS_DIN_PORTS_MASK GENMASK(9, 5)
#define SWRM_INTERRUPT_STATUS 0x200
#define SWRM_INTERRUPT_STATUS_RMSK GENMASK(16, 0)
#define SWRM_INTERRUPT_STATUS_NEW_SLAVE_ATTACHED BIT(1)
#define SWRM_INTERRUPT_STATUS_CHANGE_ENUM_SLAVE_STATUS BIT(2)
#define SWRM_INTERRUPT_STATUS_CMD_ERROR BIT(7)
#define SWRM_INTERRUPT_STATUS_SPECIAL_CMD_ID_FINISHED BIT(10)
#define SWRM_INTERRUPT_MASK_ADDR 0x204
#define SWRM_INTERRUPT_CLEAR 0x208
#define SWRM_CMD_FIFO_WR_CMD 0x300
#define SWRM_CMD_FIFO_RD_CMD 0x304
#define SWRM_CMD_FIFO_CMD 0x308
#define SWRM_CMD_FIFO_STATUS 0x30C
#define SWRM_CMD_FIFO_CFG_ADDR 0x314
#define SWRM_RD_WR_CMD_RETRIES 0x7
#define SWRM_CMD_FIFO_RD_FIFO_ADDR 0x318
#define SWRM_ENUMERATOR_CFG_ADDR 0x500
#define SWRM_MCP_FRAME_CTRL_BANK_ADDR(m) (0x101C + 0x40 * (m))
#define SWRM_MCP_FRAME_CTRL_BANK_ROW_CTRL_SHFT 3
#define SWRM_MCP_FRAME_CTRL_BANK_COL_CTRL_BMSK GENMASK(2, 0)
#define SWRM_MCP_FRAME_CTRL_BANK_ROW_CTRL_BMSK GENMASK(7, 3)
#define SWRM_MCP_FRAME_CTRL_BANK_COL_CTRL_SHFT 0
#define SWRM_MCP_CFG_ADDR 0x1048
#define SWRM_MCP_CFG_MAX_NUM_OF_CMD_NO_PINGS_BMSK GENMASK(21, 17)
#define SWRM_MCP_CFG_MAX_NUM_OF_CMD_NO_PINGS_SHFT 0x11
#define SWRM_DEF_CMD_NO_PINGS 0x1f
#define SWRM_MCP_STATUS 0x104C
#define SWRM_MCP_STATUS_BANK_NUM_MASK BIT(0)
#define SWRM_MCP_SLV_STATUS 0x1090
#define SWRM_MCP_SLV_STATUS_MASK GENMASK(1, 0)
#define SWRM_DP_PORT_CTRL_BANK(n, m) (0x1124 + 0x100 * (n - 1) + 0x40 * m)
#define SWRM_DP_PORT_CTRL_EN_CHAN_SHFT 0x18
#define SWRM_DP_PORT_CTRL_OFFSET2_SHFT 0x10
#define SWRM_DP_PORT_CTRL_OFFSET1_SHFT 0x08
#define SWRM_AHB_BRIDGE_WR_DATA_0 0xc85
#define SWRM_AHB_BRIDGE_WR_ADDR_0 0xc89
#define SWRM_AHB_BRIDGE_RD_ADDR_0 0xc8d
#define SWRM_AHB_BRIDGE_RD_DATA_0 0xc91
#define SWRM_REG_VAL_PACK(data, dev, id, reg) \
((reg) | ((id) << 16) | ((dev) << 20) | ((data) << 24))
#define SWRM_MAX_ROW_VAL 0 /* Rows = 48 */
#define SWRM_DEFAULT_ROWS 48
#define SWRM_MIN_COL_VAL 0 /* Cols = 2 */
#define SWRM_DEFAULT_COL 16
#define SWRM_MAX_COL_VAL 7
#define SWRM_SPECIAL_CMD_ID 0xF
#define MAX_FREQ_NUM 1
#define TIMEOUT_MS (2 * HZ)
#define QCOM_SWRM_MAX_RD_LEN 0xf
#define QCOM_SDW_MAX_PORTS 14
#define DEFAULT_CLK_FREQ 9600000
#define SWRM_MAX_DAIS 0xF
struct qcom_swrm_port_config {
u8 si;
u8 off1;
u8 off2;
};
struct qcom_swrm_ctrl {
struct sdw_bus bus;
struct device *dev;
struct regmap *regmap;
struct completion *comp;
struct work_struct slave_work;
/* read/write lock */
spinlock_t comp_lock;
/* Port alloc/free lock */
struct mutex port_lock;
struct clk *hclk;
u8 wr_cmd_id;
u8 rd_cmd_id;
int irq;
unsigned int version;
int num_din_ports;
int num_dout_ports;
unsigned long dout_port_mask;
unsigned long din_port_mask;
struct qcom_swrm_port_config pconfig[QCOM_SDW_MAX_PORTS];
struct sdw_stream_runtime *sruntime[SWRM_MAX_DAIS];
enum sdw_slave_status status[SDW_MAX_DEVICES];
int (*reg_read)(struct qcom_swrm_ctrl *ctrl, int reg, u32 *val);
int (*reg_write)(struct qcom_swrm_ctrl *ctrl, int reg, int val);
};
#define to_qcom_sdw(b) container_of(b, struct qcom_swrm_ctrl, bus)
static int qcom_swrm_abh_reg_read(struct qcom_swrm_ctrl *ctrl, int reg,
u32 *val)
{
struct regmap *wcd_regmap = ctrl->regmap;
int ret;
/* pg register + offset */
ret = regmap_bulk_write(wcd_regmap, SWRM_AHB_BRIDGE_RD_ADDR_0,
(u8 *)&reg, 4);
if (ret < 0)
return SDW_CMD_FAIL;
ret = regmap_bulk_read(wcd_regmap, SWRM_AHB_BRIDGE_RD_DATA_0,
val, 4);
if (ret < 0)
return SDW_CMD_FAIL;
return SDW_CMD_OK;
}
static int qcom_swrm_ahb_reg_write(struct qcom_swrm_ctrl *ctrl,
int reg, int val)
{
struct regmap *wcd_regmap = ctrl->regmap;
int ret;
/* pg register + offset */
ret = regmap_bulk_write(wcd_regmap, SWRM_AHB_BRIDGE_WR_DATA_0,
(u8 *)&val, 4);
if (ret)
return SDW_CMD_FAIL;
/* write address register */
ret = regmap_bulk_write(wcd_regmap, SWRM_AHB_BRIDGE_WR_ADDR_0,
(u8 *)&reg, 4);
if (ret)
return SDW_CMD_FAIL;
return SDW_CMD_OK;
}
static int qcom_swrm_cmd_fifo_wr_cmd(struct qcom_swrm_ctrl *ctrl, u8 cmd_data,
u8 dev_addr, u16 reg_addr)
{
DECLARE_COMPLETION_ONSTACK(comp);
unsigned long flags;
u32 val;
int ret;
spin_lock_irqsave(&ctrl->comp_lock, flags);
ctrl->comp = &comp;
spin_unlock_irqrestore(&ctrl->comp_lock, flags);
val = SWRM_REG_VAL_PACK(cmd_data, dev_addr,
SWRM_SPECIAL_CMD_ID, reg_addr);
ret = ctrl->reg_write(ctrl, SWRM_CMD_FIFO_WR_CMD, val);
if (ret)
goto err;
ret = wait_for_completion_timeout(ctrl->comp,
msecs_to_jiffies(TIMEOUT_MS));
if (!ret)
ret = SDW_CMD_IGNORED;
else
ret = SDW_CMD_OK;
err:
spin_lock_irqsave(&ctrl->comp_lock, flags);
ctrl->comp = NULL;
spin_unlock_irqrestore(&ctrl->comp_lock, flags);
return ret;
}
static int qcom_swrm_cmd_fifo_rd_cmd(struct qcom_swrm_ctrl *ctrl,
u8 dev_addr, u16 reg_addr,
u32 len, u8 *rval)
{
int i, ret;
u32 val;
DECLARE_COMPLETION_ONSTACK(comp);
unsigned long flags;
spin_lock_irqsave(&ctrl->comp_lock, flags);
ctrl->comp = &comp;
spin_unlock_irqrestore(&ctrl->comp_lock, flags);
val = SWRM_REG_VAL_PACK(len, dev_addr, SWRM_SPECIAL_CMD_ID, reg_addr);
ret = ctrl->reg_write(ctrl, SWRM_CMD_FIFO_RD_CMD, val);
if (ret)
goto err;
ret = wait_for_completion_timeout(ctrl->comp,
msecs_to_jiffies(TIMEOUT_MS));
if (!ret) {
ret = SDW_CMD_IGNORED;
goto err;
} else {
ret = SDW_CMD_OK;
}
for (i = 0; i < len; i++) {
ctrl->reg_read(ctrl, SWRM_CMD_FIFO_RD_FIFO_ADDR, &val);
rval[i] = val & 0xFF;
}
err:
spin_lock_irqsave(&ctrl->comp_lock, flags);
ctrl->comp = NULL;
spin_unlock_irqrestore(&ctrl->comp_lock, flags);
return ret;
}
static void qcom_swrm_get_device_status(struct qcom_swrm_ctrl *ctrl)
{
u32 val;
int i;
ctrl->reg_read(ctrl, SWRM_MCP_SLV_STATUS, &val);
for (i = 0; i < SDW_MAX_DEVICES; i++) {
u32 s;
s = (val >> (i * 2));
s &= SWRM_MCP_SLV_STATUS_MASK;
ctrl->status[i] = s;
}
}
static irqreturn_t qcom_swrm_irq_handler(int irq, void *dev_id)
{
struct qcom_swrm_ctrl *ctrl = dev_id;
u32 sts, value;
unsigned long flags;
ctrl->reg_read(ctrl, SWRM_INTERRUPT_STATUS, &sts);
if (sts & SWRM_INTERRUPT_STATUS_CMD_ERROR) {
ctrl->reg_read(ctrl, SWRM_CMD_FIFO_STATUS, &value);
dev_err_ratelimited(ctrl->dev,
"CMD error, fifo status 0x%x\n",
value);
ctrl->reg_write(ctrl, SWRM_CMD_FIFO_CMD, 0x1);
}
if ((sts & SWRM_INTERRUPT_STATUS_NEW_SLAVE_ATTACHED) ||
sts & SWRM_INTERRUPT_STATUS_CHANGE_ENUM_SLAVE_STATUS)
schedule_work(&ctrl->slave_work);
/**
* clear the interrupt before complete() is called, as complete can
* schedule new read/writes which require interrupts, clearing the
* interrupt would avoid missing interrupts in such cases.
*/
ctrl->reg_write(ctrl, SWRM_INTERRUPT_CLEAR, sts);
if (sts & SWRM_INTERRUPT_STATUS_SPECIAL_CMD_ID_FINISHED) {
spin_lock_irqsave(&ctrl->comp_lock, flags);
if (ctrl->comp)
complete(ctrl->comp);
spin_unlock_irqrestore(&ctrl->comp_lock, flags);
}
return IRQ_HANDLED;
}
static int qcom_swrm_init(struct qcom_swrm_ctrl *ctrl)
{
u32 val;
/* Clear Rows and Cols */
val = (SWRM_MAX_ROW_VAL << SWRM_MCP_FRAME_CTRL_BANK_ROW_CTRL_SHFT |
SWRM_MIN_COL_VAL << SWRM_MCP_FRAME_CTRL_BANK_COL_CTRL_SHFT);
ctrl->reg_write(ctrl, SWRM_MCP_FRAME_CTRL_BANK_ADDR(0), val);
/* Disable Auto enumeration */
ctrl->reg_write(ctrl, SWRM_ENUMERATOR_CFG_ADDR, 0);
/* Mask soundwire interrupts */
ctrl->reg_write(ctrl, SWRM_INTERRUPT_MASK_ADDR,
SWRM_INTERRUPT_STATUS_RMSK);
/* Configure No pings */
ctrl->reg_read(ctrl, SWRM_MCP_CFG_ADDR, &val);
val &= ~SWRM_MCP_CFG_MAX_NUM_OF_CMD_NO_PINGS_BMSK;
val |= (SWRM_DEF_CMD_NO_PINGS <<
SWRM_MCP_CFG_MAX_NUM_OF_CMD_NO_PINGS_SHFT);
ctrl->reg_write(ctrl, SWRM_MCP_CFG_ADDR, val);
/* Configure number of retries of a read/write cmd */
ctrl->reg_write(ctrl, SWRM_CMD_FIFO_CFG_ADDR, SWRM_RD_WR_CMD_RETRIES);
/* Set IRQ to PULSE */
ctrl->reg_write(ctrl, SWRM_COMP_CFG_ADDR,
SWRM_COMP_CFG_IRQ_LEVEL_OR_PULSE_MSK |
SWRM_COMP_CFG_ENABLE_MSK);
return 0;
}
static enum sdw_command_response qcom_swrm_xfer_msg(struct sdw_bus *bus,
struct sdw_msg *msg)
{
struct qcom_swrm_ctrl *ctrl = to_qcom_sdw(bus);
int ret, i, len;
if (msg->flags == SDW_MSG_FLAG_READ) {
for (i = 0; i < msg->len;) {
if ((msg->len - i) < QCOM_SWRM_MAX_RD_LEN)
len = msg->len - i;
else
len = QCOM_SWRM_MAX_RD_LEN;
ret = qcom_swrm_cmd_fifo_rd_cmd(ctrl, msg->dev_num,
msg->addr + i, len,
&msg->buf[i]);
if (ret)
return ret;
i = i + len;
}
} else if (msg->flags == SDW_MSG_FLAG_WRITE) {
for (i = 0; i < msg->len; i++) {
ret = qcom_swrm_cmd_fifo_wr_cmd(ctrl, msg->buf[i],
msg->dev_num,
msg->addr + i);
if (ret)
return SDW_CMD_IGNORED;
}
}
return SDW_CMD_OK;
}
static int qcom_swrm_pre_bank_switch(struct sdw_bus *bus)
{
u32 reg = SWRM_MCP_FRAME_CTRL_BANK_ADDR(bus->params.next_bank);
struct qcom_swrm_ctrl *ctrl = to_qcom_sdw(bus);
u32 val;
ctrl->reg_read(ctrl, reg, &val);
val &= ~SWRM_MCP_FRAME_CTRL_BANK_COL_CTRL_BMSK;
val &= ~SWRM_MCP_FRAME_CTRL_BANK_ROW_CTRL_BMSK;
val |= (SWRM_MAX_ROW_VAL << SWRM_MCP_FRAME_CTRL_BANK_ROW_CTRL_SHFT |
SWRM_MAX_COL_VAL << SWRM_MCP_FRAME_CTRL_BANK_COL_CTRL_SHFT);
return ctrl->reg_write(ctrl, reg, val);
}
static int qcom_swrm_port_params(struct sdw_bus *bus,
struct sdw_port_params *p_params,
unsigned int bank)
{
/* TBD */
return 0;
}
static int qcom_swrm_transport_params(struct sdw_bus *bus,
struct sdw_transport_params *params,
enum sdw_reg_bank bank)
{
struct qcom_swrm_ctrl *ctrl = to_qcom_sdw(bus);
u32 value;
value = params->offset1 << SWRM_DP_PORT_CTRL_OFFSET1_SHFT;
value |= params->offset2 << SWRM_DP_PORT_CTRL_OFFSET2_SHFT;
value |= params->sample_interval - 1;
return ctrl->reg_write(ctrl,
SWRM_DP_PORT_CTRL_BANK((params->port_num), bank),
value);
}
static int qcom_swrm_port_enable(struct sdw_bus *bus,
struct sdw_enable_ch *enable_ch,
unsigned int bank)
{
u32 reg = SWRM_DP_PORT_CTRL_BANK(enable_ch->port_num, bank);
struct qcom_swrm_ctrl *ctrl = to_qcom_sdw(bus);
u32 val;
ctrl->reg_read(ctrl, reg, &val);
if (enable_ch->enable)
val |= (enable_ch->ch_mask << SWRM_DP_PORT_CTRL_EN_CHAN_SHFT);
else
val &= ~(0xff << SWRM_DP_PORT_CTRL_EN_CHAN_SHFT);
return ctrl->reg_write(ctrl, reg, val);
}
static struct sdw_master_port_ops qcom_swrm_port_ops = {
.dpn_set_port_params = qcom_swrm_port_params,
.dpn_set_port_transport_params = qcom_swrm_transport_params,
.dpn_port_enable_ch = qcom_swrm_port_enable,
};
static struct sdw_master_ops qcom_swrm_ops = {
.xfer_msg = qcom_swrm_xfer_msg,
.pre_bank_switch = qcom_swrm_pre_bank_switch,
};
static int qcom_swrm_compute_params(struct sdw_bus *bus)
{
struct qcom_swrm_ctrl *ctrl = to_qcom_sdw(bus);
struct sdw_master_runtime *m_rt;
struct sdw_slave_runtime *s_rt;
struct sdw_port_runtime *p_rt;
struct qcom_swrm_port_config *pcfg;
int i = 0;
list_for_each_entry(m_rt, &bus->m_rt_list, bus_node) {
list_for_each_entry(p_rt, &m_rt->port_list, port_node) {
pcfg = &ctrl->pconfig[p_rt->num - 1];
p_rt->transport_params.port_num = p_rt->num;
p_rt->transport_params.sample_interval = pcfg->si + 1;
p_rt->transport_params.offset1 = pcfg->off1;
p_rt->transport_params.offset2 = pcfg->off2;
}
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) {
pcfg = &ctrl->pconfig[i];
p_rt->transport_params.port_num = p_rt->num;
p_rt->transport_params.sample_interval =
pcfg->si + 1;
p_rt->transport_params.offset1 = pcfg->off1;
p_rt->transport_params.offset2 = pcfg->off2;
i++;
}
}
}
return 0;
}
static u32 qcom_swrm_freq_tbl[MAX_FREQ_NUM] = {
DEFAULT_CLK_FREQ,
};
static void qcom_swrm_slave_wq(struct work_struct *work)
{
struct qcom_swrm_ctrl *ctrl =
container_of(work, struct qcom_swrm_ctrl, slave_work);
qcom_swrm_get_device_status(ctrl);
sdw_handle_slave_status(&ctrl->bus, ctrl->status);
}
static void qcom_swrm_stream_free_ports(struct qcom_swrm_ctrl *ctrl,
struct sdw_stream_runtime *stream)
{
struct sdw_master_runtime *m_rt;
struct sdw_port_runtime *p_rt;
unsigned long *port_mask;
mutex_lock(&ctrl->port_lock);
list_for_each_entry(m_rt, &stream->master_list, stream_node) {
if (m_rt->direction == SDW_DATA_DIR_RX)
port_mask = &ctrl->dout_port_mask;
else
port_mask = &ctrl->din_port_mask;
list_for_each_entry(p_rt, &m_rt->port_list, port_node)
clear_bit(p_rt->num - 1, port_mask);
}
mutex_unlock(&ctrl->port_lock);
}
static int qcom_swrm_stream_alloc_ports(struct qcom_swrm_ctrl *ctrl,
struct sdw_stream_runtime *stream,
struct snd_pcm_hw_params *params,
int direction)
{
struct sdw_port_config pconfig[QCOM_SDW_MAX_PORTS];
struct sdw_stream_config sconfig;
struct sdw_master_runtime *m_rt;
struct sdw_slave_runtime *s_rt;
struct sdw_port_runtime *p_rt;
unsigned long *port_mask;
int i, maxport, pn, nports = 0, ret = 0;
mutex_lock(&ctrl->port_lock);
list_for_each_entry(m_rt, &stream->master_list, stream_node) {
if (m_rt->direction == SDW_DATA_DIR_RX) {
maxport = ctrl->num_dout_ports;
port_mask = &ctrl->dout_port_mask;
} else {
maxport = ctrl->num_din_ports;
port_mask = &ctrl->din_port_mask;
}
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) {
/* Port numbers start from 1 - 14*/
pn = find_first_zero_bit(port_mask, maxport);
if (pn > (maxport - 1)) {
dev_err(ctrl->dev, "All ports busy\n");
ret = -EBUSY;
goto err;
}
set_bit(pn, port_mask);
pconfig[nports].num = pn + 1;
pconfig[nports].ch_mask = p_rt->ch_mask;
nports++;
}
}
}
if (direction == SNDRV_PCM_STREAM_CAPTURE)
sconfig.direction = SDW_DATA_DIR_TX;
else
sconfig.direction = SDW_DATA_DIR_RX;
/* hw parameters wil be ignored as we only support PDM */
sconfig.ch_count = 1;
sconfig.frame_rate = params_rate(params);
sconfig.type = stream->type;
sconfig.bps = 1;
sdw_stream_add_master(&ctrl->bus, &sconfig, pconfig,
nports, stream);
err:
if (ret) {
for (i = 0; i < nports; i++)
clear_bit(pconfig[i].num - 1, port_mask);
}
mutex_unlock(&ctrl->port_lock);
return ret;
}
static int qcom_swrm_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct qcom_swrm_ctrl *ctrl = dev_get_drvdata(dai->dev);
struct sdw_stream_runtime *sruntime = ctrl->sruntime[dai->id];
int ret;
ret = qcom_swrm_stream_alloc_ports(ctrl, sruntime, params,
substream->stream);
if (ret)
qcom_swrm_stream_free_ports(ctrl, sruntime);
return ret;
}
static int qcom_swrm_hw_free(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct qcom_swrm_ctrl *ctrl = dev_get_drvdata(dai->dev);
struct sdw_stream_runtime *sruntime = ctrl->sruntime[dai->id];
qcom_swrm_stream_free_ports(ctrl, sruntime);
sdw_stream_remove_master(&ctrl->bus, sruntime);
return 0;
}
static int qcom_swrm_set_sdw_stream(struct snd_soc_dai *dai,
void *stream, int direction)
{
struct qcom_swrm_ctrl *ctrl = dev_get_drvdata(dai->dev);
ctrl->sruntime[dai->id] = stream;
return 0;
}
static int qcom_swrm_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct qcom_swrm_ctrl *ctrl = dev_get_drvdata(dai->dev);
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct sdw_stream_runtime *sruntime;
int ret, i;
sruntime = sdw_alloc_stream(dai->name);
if (!sruntime)
return -ENOMEM;
ctrl->sruntime[dai->id] = sruntime;
for (i = 0; i < rtd->num_codecs; i++) {
ret = snd_soc_dai_set_sdw_stream(rtd->codec_dais[i], sruntime,
substream->stream);
if (ret < 0 && ret != -ENOTSUPP) {
dev_err(dai->dev, "Failed to set sdw stream on %s",
rtd->codec_dais[i]->name);
sdw_release_stream(sruntime);
return ret;
}
}
return 0;
}
static void qcom_swrm_shutdown(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct qcom_swrm_ctrl *ctrl = dev_get_drvdata(dai->dev);
sdw_release_stream(ctrl->sruntime[dai->id]);
ctrl->sruntime[dai->id] = NULL;
}
static const struct snd_soc_dai_ops qcom_swrm_pdm_dai_ops = {
.hw_params = qcom_swrm_hw_params,
.hw_free = qcom_swrm_hw_free,
.startup = qcom_swrm_startup,
.shutdown = qcom_swrm_shutdown,
.set_sdw_stream = qcom_swrm_set_sdw_stream,
};
static const struct snd_soc_component_driver qcom_swrm_dai_component = {
.name = "soundwire",
};
static int qcom_swrm_register_dais(struct qcom_swrm_ctrl *ctrl)
{
int num_dais = ctrl->num_dout_ports + ctrl->num_din_ports;
struct snd_soc_dai_driver *dais;
struct snd_soc_pcm_stream *stream;
struct device *dev = ctrl->dev;
int i;
/* PDM dais are only tested for now */
dais = devm_kcalloc(dev, num_dais, sizeof(*dais), GFP_KERNEL);
if (!dais)
return -ENOMEM;
for (i = 0; i < num_dais; i++) {
dais[i].name = devm_kasprintf(dev, GFP_KERNEL, "SDW Pin%d", i);
if (!dais[i].name)
return -ENOMEM;
if (i < ctrl->num_dout_ports)
stream = &dais[i].playback;
else
stream = &dais[i].capture;
stream->channels_min = 1;
stream->channels_max = 1;
stream->rates = SNDRV_PCM_RATE_48000;
stream->formats = SNDRV_PCM_FMTBIT_S16_LE;
dais[i].ops = &qcom_swrm_pdm_dai_ops;
dais[i].id = i;
}
return devm_snd_soc_register_component(ctrl->dev,
&qcom_swrm_dai_component,
dais, num_dais);
}
static int qcom_swrm_get_port_config(struct qcom_swrm_ctrl *ctrl)
{
struct device_node *np = ctrl->dev->of_node;
u8 off1[QCOM_SDW_MAX_PORTS];
u8 off2[QCOM_SDW_MAX_PORTS];
u8 si[QCOM_SDW_MAX_PORTS];
int i, ret, nports, val;
ctrl->reg_read(ctrl, SWRM_COMP_PARAMS, &val);
ctrl->num_dout_ports = val & SWRM_COMP_PARAMS_DOUT_PORTS_MASK;
ctrl->num_din_ports = (val & SWRM_COMP_PARAMS_DIN_PORTS_MASK) >> 5;
ret = of_property_read_u32(np, "qcom,din-ports", &val);
if (ret)
return ret;
if (val > ctrl->num_din_ports)
return -EINVAL;
ctrl->num_din_ports = val;
ret = of_property_read_u32(np, "qcom,dout-ports", &val);
if (ret)
return ret;
if (val > ctrl->num_dout_ports)
return -EINVAL;
ctrl->num_dout_ports = val;
nports = ctrl->num_dout_ports + ctrl->num_din_ports;
ret = of_property_read_u8_array(np, "qcom,ports-offset1",
off1, nports);
if (ret)
return ret;
ret = of_property_read_u8_array(np, "qcom,ports-offset2",
off2, nports);
if (ret)
return ret;
ret = of_property_read_u8_array(np, "qcom,ports-sinterval-low",
si, nports);
if (ret)
return ret;
for (i = 0; i < nports; i++) {
ctrl->pconfig[i].si = si[i];
ctrl->pconfig[i].off1 = off1[i];
ctrl->pconfig[i].off2 = off2[i];
}
return 0;
}
static int qcom_swrm_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct sdw_master_prop *prop;
struct sdw_bus_params *params;
struct qcom_swrm_ctrl *ctrl;
int ret;
u32 val;
ctrl = devm_kzalloc(dev, sizeof(*ctrl), GFP_KERNEL);
if (!ctrl)
return -ENOMEM;
if (dev->parent->bus == &slimbus_bus) {
ctrl->reg_read = qcom_swrm_abh_reg_read;
ctrl->reg_write = qcom_swrm_ahb_reg_write;
ctrl->regmap = dev_get_regmap(dev->parent, NULL);
if (!ctrl->regmap)
return -EINVAL;
} else {
/* Only WCD based SoundWire controller is supported */
return -ENOTSUPP;
}
ctrl->irq = of_irq_get(dev->of_node, 0);
if (ctrl->irq < 0)
return ctrl->irq;
ctrl->hclk = devm_clk_get(dev, "iface");
if (IS_ERR(ctrl->hclk))
return PTR_ERR(ctrl->hclk);
clk_prepare_enable(ctrl->hclk);
ctrl->dev = dev;
dev_set_drvdata(&pdev->dev, ctrl);
spin_lock_init(&ctrl->comp_lock);
mutex_init(&ctrl->port_lock);
INIT_WORK(&ctrl->slave_work, qcom_swrm_slave_wq);
ctrl->bus.dev = dev;
ctrl->bus.ops = &qcom_swrm_ops;
ctrl->bus.port_ops = &qcom_swrm_port_ops;
ctrl->bus.compute_params = &qcom_swrm_compute_params;
ret = qcom_swrm_get_port_config(ctrl);
if (ret)
return ret;
params = &ctrl->bus.params;
params->max_dr_freq = DEFAULT_CLK_FREQ;
params->curr_dr_freq = DEFAULT_CLK_FREQ;
params->col = SWRM_DEFAULT_COL;
params->row = SWRM_DEFAULT_ROWS;
ctrl->reg_read(ctrl, SWRM_MCP_STATUS, &val);
params->curr_bank = val & SWRM_MCP_STATUS_BANK_NUM_MASK;
params->next_bank = !params->curr_bank;
prop = &ctrl->bus.prop;
prop->max_clk_freq = DEFAULT_CLK_FREQ;
prop->num_clk_gears = 0;
prop->num_clk_freq = MAX_FREQ_NUM;
prop->clk_freq = &qcom_swrm_freq_tbl[0];
prop->default_col = SWRM_DEFAULT_COL;
prop->default_row = SWRM_DEFAULT_ROWS;
ctrl->reg_read(ctrl, SWRM_COMP_HW_VERSION, &ctrl->version);
ret = devm_request_threaded_irq(dev, ctrl->irq, NULL,
qcom_swrm_irq_handler,
IRQF_TRIGGER_RISING,
"soundwire", ctrl);
if (ret) {
dev_err(dev, "Failed to request soundwire irq\n");
goto err;
}
ret = sdw_add_bus_master(&ctrl->bus);
if (ret) {
dev_err(dev, "Failed to register Soundwire controller (%d)\n",
ret);
goto err;
}
qcom_swrm_init(ctrl);
ret = qcom_swrm_register_dais(ctrl);
if (ret)
goto err;
dev_info(dev, "Qualcomm Soundwire controller v%x.%x.%x Registered\n",
(ctrl->version >> 24) & 0xff, (ctrl->version >> 16) & 0xff,
ctrl->version & 0xffff);
return 0;
err:
clk_disable_unprepare(ctrl->hclk);
return ret;
}
static int qcom_swrm_remove(struct platform_device *pdev)
{
struct qcom_swrm_ctrl *ctrl = dev_get_drvdata(&pdev->dev);
sdw_delete_bus_master(&ctrl->bus);
clk_disable_unprepare(ctrl->hclk);
return 0;
}
static const struct of_device_id qcom_swrm_of_match[] = {
{ .compatible = "qcom,soundwire-v1.3.0", },
{/* sentinel */},
};
MODULE_DEVICE_TABLE(of, qcom_swrm_of_match);
static struct platform_driver qcom_swrm_driver = {
.probe = &qcom_swrm_probe,
.remove = &qcom_swrm_remove,
.driver = {
.name = "qcom-soundwire",
.of_match_table = qcom_swrm_of_match,
}
};
module_platform_driver(qcom_swrm_driver);
MODULE_DESCRIPTION("Qualcomm soundwire driver");
MODULE_LICENSE("GPL v2");