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WSL2-Linux-Kernel/drivers/soundwire/qcom.c

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C
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// 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/debugfs.h>
#include <linux/of.h>
#include <linux/of_irq.h>
#include <linux/of_device.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <linux/reset.h>
#include <linux/slab.h>
#include <linux/pm_wakeirq.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_SW_RESET 0x008
#define SWRM_COMP_STATUS 0x014
#define SWRM_FRM_GEN_ENABLED BIT(0)
#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_WR_FIFO_DEPTH GENMASK(14, 10)
#define SWRM_COMP_PARAMS_RD_FIFO_DEPTH GENMASK(19, 15)
#define SWRM_COMP_PARAMS_DOUT_PORTS_MASK GENMASK(4, 0)
#define SWRM_COMP_PARAMS_DIN_PORTS_MASK GENMASK(9, 5)
#define SWRM_COMP_MASTER_ID 0x104
#define SWRM_INTERRUPT_STATUS 0x200
#define SWRM_INTERRUPT_STATUS_RMSK GENMASK(16, 0)
#define SWRM_INTERRUPT_STATUS_SLAVE_PEND_IRQ BIT(0)
#define SWRM_INTERRUPT_STATUS_NEW_SLAVE_ATTACHED BIT(1)
#define SWRM_INTERRUPT_STATUS_CHANGE_ENUM_SLAVE_STATUS BIT(2)
#define SWRM_INTERRUPT_STATUS_MASTER_CLASH_DET BIT(3)
#define SWRM_INTERRUPT_STATUS_RD_FIFO_OVERFLOW BIT(4)
#define SWRM_INTERRUPT_STATUS_RD_FIFO_UNDERFLOW BIT(5)
#define SWRM_INTERRUPT_STATUS_WR_CMD_FIFO_OVERFLOW BIT(6)
#define SWRM_INTERRUPT_STATUS_CMD_ERROR BIT(7)
#define SWRM_INTERRUPT_STATUS_DOUT_PORT_COLLISION BIT(8)
#define SWRM_INTERRUPT_STATUS_READ_EN_RD_VALID_MISMATCH BIT(9)
#define SWRM_INTERRUPT_STATUS_SPECIAL_CMD_ID_FINISHED BIT(10)
#define SWRM_INTERRUPT_STATUS_BUS_RESET_FINISHED_V2 BIT(13)
#define SWRM_INTERRUPT_STATUS_CLK_STOP_FINISHED_V2 BIT(14)
#define SWRM_INTERRUPT_STATUS_EXT_CLK_STOP_WAKEUP BIT(16)
#define SWRM_INTERRUPT_MAX 17
#define SWRM_INTERRUPT_MASK_ADDR 0x204
#define SWRM_INTERRUPT_CLEAR 0x208
#define SWRM_INTERRUPT_CPU_EN 0x210
#define SWRM_CMD_FIFO_WR_CMD 0x300
#define SWRM_CMD_FIFO_RD_CMD 0x304
#define SWRM_CMD_FIFO_CMD 0x308
#define SWRM_CMD_FIFO_FLUSH 0x1
#define SWRM_CMD_FIFO_STATUS 0x30C
#define SWRM_RD_CMD_FIFO_CNT_MASK GENMASK(20, 16)
#define SWRM_WR_CMD_FIFO_CNT_MASK GENMASK(12, 8)
#define SWRM_CMD_FIFO_CFG_ADDR 0x314
#define SWRM_CONTINUE_EXEC_ON_CMD_IGNORE BIT(31)
#define SWRM_RD_WR_CMD_RETRIES 0x7
#define SWRM_CMD_FIFO_RD_FIFO_ADDR 0x318
#define SWRM_RD_FIFO_CMD_ID_MASK GENMASK(11, 8)
#define SWRM_ENUMERATOR_CFG_ADDR 0x500
#define SWRM_ENUMERATOR_SLAVE_DEV_ID_1(m) (0x530 + 0x8 * (m))
#define SWRM_ENUMERATOR_SLAVE_DEV_ID_2(m) (0x534 + 0x8 * (m))
#define SWRM_MCP_FRAME_CTRL_BANK_ADDR(m) (0x101C + 0x40 * (m))
#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_BUS_CTRL 0x1044
#define SWRM_MCP_BUS_CLK_START BIT(1)
#define SWRM_MCP_CFG_ADDR 0x1048
#define SWRM_MCP_CFG_MAX_NUM_OF_CMD_NO_PINGS_BMSK GENMASK(21, 17)
#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_MCP_SLV_STATUS_SZ 2
#define SWRM_DP_PORT_CTRL_BANK(n, m) (0x1124 + 0x100 * (n - 1) + 0x40 * m)
#define SWRM_DP_PORT_CTRL_2_BANK(n, m) (0x1128 + 0x100 * (n - 1) + 0x40 * m)
#define SWRM_DP_BLOCK_CTRL_1(n) (0x112C + 0x100 * (n - 1))
#define SWRM_DP_BLOCK_CTRL2_BANK(n, m) (0x1130 + 0x100 * (n - 1) + 0x40 * m)
#define SWRM_DP_PORT_HCTRL_BANK(n, m) (0x1134 + 0x100 * (n - 1) + 0x40 * m)
#define SWRM_DP_BLOCK_CTRL3_BANK(n, m) (0x1138 + 0x100 * (n - 1) + 0x40 * m)
#define SWRM_DIN_DPn_PCM_PORT_CTRL(n) (0x1054 + 0x100 * (n - 1))
#define SWR_MSTR_MAX_REG_ADDR (0x1740)
#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_SPECIAL_CMD_ID 0xF
#define MAX_FREQ_NUM 1
#define TIMEOUT_MS 100
#define QCOM_SWRM_MAX_RD_LEN 0x1
#define QCOM_SDW_MAX_PORTS 14
#define DEFAULT_CLK_FREQ 9600000
#define SWRM_MAX_DAIS 0xF
#define SWR_INVALID_PARAM 0xFF
#define SWR_HSTOP_MAX_VAL 0xF
#define SWR_HSTART_MIN_VAL 0x0
#define SWR_BROADCAST_CMD_ID 0x0F
#define SWR_MAX_CMD_ID 14
#define MAX_FIFO_RD_RETRY 3
#define SWR_OVERFLOW_RETRY_COUNT 30
#define SWRM_LINK_STATUS_RETRY_CNT 100
enum {
MASTER_ID_WSA = 1,
MASTER_ID_RX,
MASTER_ID_TX
};
struct qcom_swrm_port_config {
u8 si;
u8 off1;
u8 off2;
u8 bp_mode;
u8 hstart;
u8 hstop;
u8 word_length;
u8 blk_group_count;
u8 lane_control;
};
struct qcom_swrm_ctrl {
struct sdw_bus bus;
struct device *dev;
struct regmap *regmap;
void __iomem *mmio;
struct reset_control *audio_cgcr;
#ifdef CONFIG_DEBUG_FS
struct dentry *debugfs;
#endif
struct completion broadcast;
struct completion enumeration;
struct work_struct slave_work;
/* 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 wake_irq;
int num_din_ports;
int num_dout_ports;
int cols_index;
int rows_index;
unsigned long dout_port_mask;
unsigned long din_port_mask;
u32 intr_mask;
u8 rcmd_id;
u8 wcmd_id;
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 + 1];
int (*reg_read)(struct qcom_swrm_ctrl *ctrl, int reg, u32 *val);
int (*reg_write)(struct qcom_swrm_ctrl *ctrl, int reg, int val);
u32 slave_status;
u32 wr_fifo_depth;
u32 rd_fifo_depth;
bool clock_stop_not_supported;
};
struct qcom_swrm_data {
u32 default_cols;
u32 default_rows;
bool sw_clk_gate_required;
};
static const struct qcom_swrm_data swrm_v1_3_data = {
.default_rows = 48,
.default_cols = 16,
};
static const struct qcom_swrm_data swrm_v1_5_data = {
.default_rows = 50,
.default_cols = 16,
};
static const struct qcom_swrm_data swrm_v1_6_data = {
.default_rows = 50,
.default_cols = 16,
.sw_clk_gate_required = true,
};
#define to_qcom_sdw(b) container_of(b, struct qcom_swrm_ctrl, bus)
static int qcom_swrm_ahb_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_cpu_reg_read(struct qcom_swrm_ctrl *ctrl, int reg,
u32 *val)
{
*val = readl(ctrl->mmio + reg);
return SDW_CMD_OK;
}
static int qcom_swrm_cpu_reg_write(struct qcom_swrm_ctrl *ctrl, int reg,
int val)
{
writel(val, ctrl->mmio + reg);
return SDW_CMD_OK;
}
static u32 swrm_get_packed_reg_val(u8 *cmd_id, u8 cmd_data,
u8 dev_addr, u16 reg_addr)
{
u32 val;
u8 id = *cmd_id;
if (id != SWR_BROADCAST_CMD_ID) {
if (id < SWR_MAX_CMD_ID)
id += 1;
else
id = 0;
*cmd_id = id;
}
val = SWRM_REG_VAL_PACK(cmd_data, dev_addr, id, reg_addr);
return val;
}
static int swrm_wait_for_rd_fifo_avail(struct qcom_swrm_ctrl *swrm)
{
u32 fifo_outstanding_data, value;
int fifo_retry_count = SWR_OVERFLOW_RETRY_COUNT;
do {
/* Check for fifo underflow during read */
swrm->reg_read(swrm, SWRM_CMD_FIFO_STATUS, &value);
fifo_outstanding_data = FIELD_GET(SWRM_RD_CMD_FIFO_CNT_MASK, value);
/* Check if read data is available in read fifo */
if (fifo_outstanding_data > 0)
return 0;
usleep_range(500, 510);
} while (fifo_retry_count--);
if (fifo_outstanding_data == 0) {
dev_err_ratelimited(swrm->dev, "%s err read underflow\n", __func__);
return -EIO;
}
return 0;
}
static int swrm_wait_for_wr_fifo_avail(struct qcom_swrm_ctrl *swrm)
{
u32 fifo_outstanding_cmds, value;
int fifo_retry_count = SWR_OVERFLOW_RETRY_COUNT;
do {
/* Check for fifo overflow during write */
swrm->reg_read(swrm, SWRM_CMD_FIFO_STATUS, &value);
fifo_outstanding_cmds = FIELD_GET(SWRM_WR_CMD_FIFO_CNT_MASK, value);
/* Check for space in write fifo before writing */
if (fifo_outstanding_cmds < swrm->wr_fifo_depth)
return 0;
usleep_range(500, 510);
} while (fifo_retry_count--);
if (fifo_outstanding_cmds == swrm->wr_fifo_depth) {
dev_err_ratelimited(swrm->dev, "%s err write overflow\n", __func__);
return -EIO;
}
return 0;
}
static int qcom_swrm_cmd_fifo_wr_cmd(struct qcom_swrm_ctrl *swrm, u8 cmd_data,
u8 dev_addr, u16 reg_addr)
{
u32 val;
int ret = 0;
u8 cmd_id = 0x0;
if (dev_addr == SDW_BROADCAST_DEV_NUM) {
cmd_id = SWR_BROADCAST_CMD_ID;
val = swrm_get_packed_reg_val(&cmd_id, cmd_data,
dev_addr, reg_addr);
} else {
val = swrm_get_packed_reg_val(&swrm->wcmd_id, cmd_data,
dev_addr, reg_addr);
}
if (swrm_wait_for_wr_fifo_avail(swrm))
return SDW_CMD_FAIL_OTHER;
/* Its assumed that write is okay as we do not get any status back */
swrm->reg_write(swrm, SWRM_CMD_FIFO_WR_CMD, val);
/* version 1.3 or less */
if (swrm->version <= 0x01030000)
usleep_range(150, 155);
if (cmd_id == SWR_BROADCAST_CMD_ID) {
/*
* sleep for 10ms for MSM soundwire variant to allow broadcast
* command to complete.
*/
ret = wait_for_completion_timeout(&swrm->broadcast,
msecs_to_jiffies(TIMEOUT_MS));
if (!ret)
ret = SDW_CMD_IGNORED;
else
ret = SDW_CMD_OK;
} else {
ret = SDW_CMD_OK;
}
return ret;
}
static int qcom_swrm_cmd_fifo_rd_cmd(struct qcom_swrm_ctrl *swrm,
u8 dev_addr, u16 reg_addr,
u32 len, u8 *rval)
{
u32 cmd_data, cmd_id, val, retry_attempt = 0;
val = swrm_get_packed_reg_val(&swrm->rcmd_id, len, dev_addr, reg_addr);
/* wait for FIFO RD to complete to avoid overflow */
usleep_range(100, 105);
swrm->reg_write(swrm, SWRM_CMD_FIFO_RD_CMD, val);
/* wait for FIFO RD CMD complete to avoid overflow */
usleep_range(250, 255);
if (swrm_wait_for_rd_fifo_avail(swrm))
return SDW_CMD_FAIL_OTHER;
do {
swrm->reg_read(swrm, SWRM_CMD_FIFO_RD_FIFO_ADDR, &cmd_data);
rval[0] = cmd_data & 0xFF;
cmd_id = FIELD_GET(SWRM_RD_FIFO_CMD_ID_MASK, cmd_data);
if (cmd_id != swrm->rcmd_id) {
if (retry_attempt < (MAX_FIFO_RD_RETRY - 1)) {
/* wait 500 us before retry on fifo read failure */
usleep_range(500, 505);
swrm->reg_write(swrm, SWRM_CMD_FIFO_CMD,
SWRM_CMD_FIFO_FLUSH);
swrm->reg_write(swrm, SWRM_CMD_FIFO_RD_CMD, val);
}
retry_attempt++;
} else {
return SDW_CMD_OK;
}
} while (retry_attempt < MAX_FIFO_RD_RETRY);
dev_err(swrm->dev, "failed to read fifo: reg: 0x%x, rcmd_id: 0x%x,\
dev_num: 0x%x, cmd_data: 0x%x\n",
reg_addr, swrm->rcmd_id, dev_addr, cmd_data);
return SDW_CMD_IGNORED;
}
static int qcom_swrm_get_alert_slave_dev_num(struct qcom_swrm_ctrl *ctrl)
{
u32 val, status;
int dev_num;
ctrl->reg_read(ctrl, SWRM_MCP_SLV_STATUS, &val);
for (dev_num = 1; dev_num <= SDW_MAX_DEVICES; dev_num++) {
status = (val >> (dev_num * SWRM_MCP_SLV_STATUS_SZ));
if ((status & SWRM_MCP_SLV_STATUS_MASK) == SDW_SLAVE_ALERT) {
ctrl->status[dev_num] = status;
return dev_num;
}
}
return -EINVAL;
}
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);
ctrl->slave_status = val;
for (i = 1; i <= SDW_MAX_DEVICES; i++) {
u32 s;
s = (val >> (i * 2));
s &= SWRM_MCP_SLV_STATUS_MASK;
ctrl->status[i] = s;
}
}
static void qcom_swrm_set_slave_dev_num(struct sdw_bus *bus,
struct sdw_slave *slave, int devnum)
{
struct qcom_swrm_ctrl *ctrl = to_qcom_sdw(bus);
u32 status;
ctrl->reg_read(ctrl, SWRM_MCP_SLV_STATUS, &status);
status = (status >> (devnum * SWRM_MCP_SLV_STATUS_SZ));
status &= SWRM_MCP_SLV_STATUS_MASK;
if (status == SDW_SLAVE_ATTACHED) {
if (slave)
slave->dev_num = devnum;
mutex_lock(&bus->bus_lock);
set_bit(devnum, bus->assigned);
mutex_unlock(&bus->bus_lock);
}
}
static int qcom_swrm_enumerate(struct sdw_bus *bus)
{
struct qcom_swrm_ctrl *ctrl = to_qcom_sdw(bus);
struct sdw_slave *slave, *_s;
struct sdw_slave_id id;
u32 val1, val2;
bool found;
u64 addr;
int i;
char *buf1 = (char *)&val1, *buf2 = (char *)&val2;
for (i = 1; i <= SDW_MAX_DEVICES; i++) {
/* do not continue if the status is Not Present */
if (!ctrl->status[i])
continue;
/*SCP_Devid5 - Devid 4*/
ctrl->reg_read(ctrl, SWRM_ENUMERATOR_SLAVE_DEV_ID_1(i), &val1);
/*SCP_Devid3 - DevId 2 Devid 1 Devid 0*/
ctrl->reg_read(ctrl, SWRM_ENUMERATOR_SLAVE_DEV_ID_2(i), &val2);
if (!val1 && !val2)
break;
addr = buf2[1] | (buf2[0] << 8) | (buf1[3] << 16) |
((u64)buf1[2] << 24) | ((u64)buf1[1] << 32) |
((u64)buf1[0] << 40);
sdw_extract_slave_id(bus, addr, &id);
found = false;
/* Now compare with entries */
list_for_each_entry_safe(slave, _s, &bus->slaves, node) {
if (sdw_compare_devid(slave, id) == 0) {
qcom_swrm_set_slave_dev_num(bus, slave, i);
found = true;
break;
}
}
if (!found) {
qcom_swrm_set_slave_dev_num(bus, NULL, i);
sdw_slave_add(bus, &id, NULL);
}
}
complete(&ctrl->enumeration);
return 0;
}
static irqreturn_t qcom_swrm_wake_irq_handler(int irq, void *dev_id)
{
struct qcom_swrm_ctrl *swrm = dev_id;
int ret;
ret = pm_runtime_resume_and_get(swrm->dev);
if (ret < 0 && ret != -EACCES) {
dev_err_ratelimited(swrm->dev,
"pm_runtime_resume_and_get failed in %s, ret %d\n",
__func__, ret);
return ret;
}
if (swrm->wake_irq > 0) {
if (!irqd_irq_disabled(irq_get_irq_data(swrm->wake_irq)))
disable_irq_nosync(swrm->wake_irq);
}
pm_runtime_mark_last_busy(swrm->dev);
pm_runtime_put_autosuspend(swrm->dev);
return IRQ_HANDLED;
}
static irqreturn_t qcom_swrm_irq_handler(int irq, void *dev_id)
{
struct qcom_swrm_ctrl *swrm = dev_id;
u32 value, intr_sts, intr_sts_masked, slave_status;
u32 i;
int devnum;
int ret = IRQ_HANDLED;
clk_prepare_enable(swrm->hclk);
swrm->reg_read(swrm, SWRM_INTERRUPT_STATUS, &intr_sts);
intr_sts_masked = intr_sts & swrm->intr_mask;
do {
for (i = 0; i < SWRM_INTERRUPT_MAX; i++) {
value = intr_sts_masked & BIT(i);
if (!value)
continue;
switch (value) {
case SWRM_INTERRUPT_STATUS_SLAVE_PEND_IRQ:
devnum = qcom_swrm_get_alert_slave_dev_num(swrm);
if (devnum < 0) {
dev_err_ratelimited(swrm->dev,
"no slave alert found.spurious interrupt\n");
} else {
sdw_handle_slave_status(&swrm->bus, swrm->status);
}
break;
case SWRM_INTERRUPT_STATUS_NEW_SLAVE_ATTACHED:
case SWRM_INTERRUPT_STATUS_CHANGE_ENUM_SLAVE_STATUS:
dev_dbg_ratelimited(swrm->dev, "SWR new slave attached\n");
swrm->reg_read(swrm, SWRM_MCP_SLV_STATUS, &slave_status);
if (swrm->slave_status == slave_status) {
dev_dbg(swrm->dev, "Slave status not changed %x\n",
slave_status);
} else {
qcom_swrm_get_device_status(swrm);
qcom_swrm_enumerate(&swrm->bus);
sdw_handle_slave_status(&swrm->bus, swrm->status);
}
break;
case SWRM_INTERRUPT_STATUS_MASTER_CLASH_DET:
dev_err_ratelimited(swrm->dev,
"%s: SWR bus clsh detected\n",
__func__);
swrm->intr_mask &= ~SWRM_INTERRUPT_STATUS_MASTER_CLASH_DET;
swrm->reg_write(swrm, SWRM_INTERRUPT_CPU_EN, swrm->intr_mask);
break;
case SWRM_INTERRUPT_STATUS_RD_FIFO_OVERFLOW:
swrm->reg_read(swrm, SWRM_CMD_FIFO_STATUS, &value);
dev_err_ratelimited(swrm->dev,
"%s: SWR read FIFO overflow fifo status 0x%x\n",
__func__, value);
break;
case SWRM_INTERRUPT_STATUS_RD_FIFO_UNDERFLOW:
swrm->reg_read(swrm, SWRM_CMD_FIFO_STATUS, &value);
dev_err_ratelimited(swrm->dev,
"%s: SWR read FIFO underflow fifo status 0x%x\n",
__func__, value);
break;
case SWRM_INTERRUPT_STATUS_WR_CMD_FIFO_OVERFLOW:
swrm->reg_read(swrm, SWRM_CMD_FIFO_STATUS, &value);
dev_err(swrm->dev,
"%s: SWR write FIFO overflow fifo status %x\n",
__func__, value);
swrm->reg_write(swrm, SWRM_CMD_FIFO_CMD, 0x1);
break;
case SWRM_INTERRUPT_STATUS_CMD_ERROR:
swrm->reg_read(swrm, SWRM_CMD_FIFO_STATUS, &value);
dev_err_ratelimited(swrm->dev,
"%s: SWR CMD error, fifo status 0x%x, flushing fifo\n",
__func__, value);
swrm->reg_write(swrm, SWRM_CMD_FIFO_CMD, 0x1);
break;
case SWRM_INTERRUPT_STATUS_DOUT_PORT_COLLISION:
dev_err_ratelimited(swrm->dev,
"%s: SWR Port collision detected\n",
__func__);
swrm->intr_mask &= ~SWRM_INTERRUPT_STATUS_DOUT_PORT_COLLISION;
swrm->reg_write(swrm,
SWRM_INTERRUPT_CPU_EN, swrm->intr_mask);
break;
case SWRM_INTERRUPT_STATUS_READ_EN_RD_VALID_MISMATCH:
dev_err_ratelimited(swrm->dev,
"%s: SWR read enable valid mismatch\n",
__func__);
swrm->intr_mask &=
~SWRM_INTERRUPT_STATUS_READ_EN_RD_VALID_MISMATCH;
swrm->reg_write(swrm,
SWRM_INTERRUPT_CPU_EN, swrm->intr_mask);
break;
case SWRM_INTERRUPT_STATUS_SPECIAL_CMD_ID_FINISHED:
complete(&swrm->broadcast);
break;
case SWRM_INTERRUPT_STATUS_BUS_RESET_FINISHED_V2:
break;
case SWRM_INTERRUPT_STATUS_CLK_STOP_FINISHED_V2:
break;
case SWRM_INTERRUPT_STATUS_EXT_CLK_STOP_WAKEUP:
break;
default:
dev_err_ratelimited(swrm->dev,
"%s: SWR unknown interrupt value: %d\n",
__func__, value);
ret = IRQ_NONE;
break;
}
}
swrm->reg_write(swrm, SWRM_INTERRUPT_CLEAR, intr_sts);
swrm->reg_read(swrm, SWRM_INTERRUPT_STATUS, &intr_sts);
intr_sts_masked = intr_sts & swrm->intr_mask;
} while (intr_sts_masked);
clk_disable_unprepare(swrm->hclk);
return ret;
}
static int qcom_swrm_init(struct qcom_swrm_ctrl *ctrl)
{
u32 val;
/* Clear Rows and Cols */
val = FIELD_PREP(SWRM_MCP_FRAME_CTRL_BANK_ROW_CTRL_BMSK, ctrl->rows_index);
val |= FIELD_PREP(SWRM_MCP_FRAME_CTRL_BANK_COL_CTRL_BMSK, ctrl->cols_index);
reset_control_reset(ctrl->audio_cgcr);
ctrl->reg_write(ctrl, SWRM_MCP_FRAME_CTRL_BANK_ADDR(0), val);
/* Enable Auto enumeration */
ctrl->reg_write(ctrl, SWRM_ENUMERATOR_CFG_ADDR, 1);
ctrl->intr_mask = SWRM_INTERRUPT_STATUS_RMSK;
/* 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);
u32p_replace_bits(&val, SWRM_DEF_CMD_NO_PINGS, SWRM_MCP_CFG_MAX_NUM_OF_CMD_NO_PINGS_BMSK);
ctrl->reg_write(ctrl, SWRM_MCP_CFG_ADDR, val);
ctrl->reg_write(ctrl, SWRM_MCP_BUS_CTRL, SWRM_MCP_BUS_CLK_START);
/* Configure number of retries of a read/write cmd */
if (ctrl->version > 0x01050001) {
/* Only for versions >= 1.5.1 */
ctrl->reg_write(ctrl, SWRM_CMD_FIFO_CFG_ADDR,
SWRM_RD_WR_CMD_RETRIES |
SWRM_CONTINUE_EXEC_ON_CMD_IGNORE);
} else {
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);
/* enable CPU IRQs */
if (ctrl->mmio) {
ctrl->reg_write(ctrl, SWRM_INTERRUPT_CPU_EN,
SWRM_INTERRUPT_STATUS_RMSK);
}
ctrl->slave_status = 0;
ctrl->reg_read(ctrl, SWRM_COMP_PARAMS, &val);
ctrl->rd_fifo_depth = FIELD_GET(SWRM_COMP_PARAMS_RD_FIFO_DEPTH, val);
ctrl->wr_fifo_depth = FIELD_GET(SWRM_COMP_PARAMS_WR_FIFO_DEPTH, val);
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);
u32p_replace_bits(&val, ctrl->cols_index, SWRM_MCP_FRAME_CTRL_BANK_COL_CTRL_BMSK);
u32p_replace_bits(&val, ctrl->rows_index, SWRM_MCP_FRAME_CTRL_BANK_ROW_CTRL_BMSK);
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)
{
struct qcom_swrm_ctrl *ctrl = to_qcom_sdw(bus);
return ctrl->reg_write(ctrl, SWRM_DP_BLOCK_CTRL_1(p_params->num),
p_params->bps - 1);
}
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);
struct qcom_swrm_port_config *pcfg;
u32 value;
int reg = SWRM_DP_PORT_CTRL_BANK((params->port_num), bank);
int ret;
pcfg = &ctrl->pconfig[params->port_num];
value = pcfg->off1 << SWRM_DP_PORT_CTRL_OFFSET1_SHFT;
value |= pcfg->off2 << SWRM_DP_PORT_CTRL_OFFSET2_SHFT;
value |= pcfg->si;
ret = ctrl->reg_write(ctrl, reg, value);
if (ret)
goto err;
if (pcfg->lane_control != SWR_INVALID_PARAM) {
reg = SWRM_DP_PORT_CTRL_2_BANK(params->port_num, bank);
value = pcfg->lane_control;
ret = ctrl->reg_write(ctrl, reg, value);
if (ret)
goto err;
}
if (pcfg->blk_group_count != SWR_INVALID_PARAM) {
reg = SWRM_DP_BLOCK_CTRL2_BANK(params->port_num, bank);
value = pcfg->blk_group_count;
ret = ctrl->reg_write(ctrl, reg, value);
if (ret)
goto err;
}
if (pcfg->hstart != SWR_INVALID_PARAM
&& pcfg->hstop != SWR_INVALID_PARAM) {
reg = SWRM_DP_PORT_HCTRL_BANK(params->port_num, bank);
value = (pcfg->hstop << 4) | pcfg->hstart;
ret = ctrl->reg_write(ctrl, reg, value);
} else {
reg = SWRM_DP_PORT_HCTRL_BANK(params->port_num, bank);
value = (SWR_HSTOP_MAX_VAL << 4) | SWR_HSTART_MIN_VAL;
ret = ctrl->reg_write(ctrl, reg, value);
}
if (ret)
goto err;
if (pcfg->bp_mode != SWR_INVALID_PARAM) {
reg = SWRM_DP_BLOCK_CTRL3_BANK(params->port_num, bank);
ret = ctrl->reg_write(ctrl, reg, pcfg->bp_mode);
}
err:
return ret;
}
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 const 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 const 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;
struct sdw_slave *slave;
unsigned int m_port;
int i = 1;
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];
p_rt->transport_params.port_num = p_rt->num;
if (pcfg->word_length != SWR_INVALID_PARAM) {
sdw_fill_port_params(&p_rt->port_params,
p_rt->num, pcfg->word_length + 1,
SDW_PORT_FLOW_MODE_ISOCH,
SDW_PORT_DATA_MODE_NORMAL);
}
}
list_for_each_entry(s_rt, &m_rt->slave_rt_list, m_rt_node) {
slave = s_rt->slave;
list_for_each_entry(p_rt, &s_rt->port_list, port_node) {
m_port = slave->m_port_map[p_rt->num];
/* port config starts at offset 0 so -1 from actual port number */
if (m_port)
pcfg = &ctrl->pconfig[m_port];
else
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;
p_rt->transport_params.blk_pkg_mode = pcfg->bp_mode;
p_rt->transport_params.blk_grp_ctrl = pcfg->blk_group_count;
p_rt->transport_params.hstart = pcfg->hstart;
p_rt->transport_params.hstop = pcfg->hstop;
p_rt->transport_params.lane_ctrl = pcfg->lane_control;
if (pcfg->word_length != SWR_INVALID_PARAM) {
sdw_fill_port_params(&p_rt->port_params,
p_rt->num,
pcfg->word_length + 1,
SDW_PORT_FLOW_MODE_ISOCH,
SDW_PORT_DATA_MODE_NORMAL);
}
i++;
}
}
}
return 0;
}
static u32 qcom_swrm_freq_tbl[MAX_FREQ_NUM] = {
DEFAULT_CLK_FREQ,
};
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, 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;
struct sdw_slave *slave;
unsigned long *port_mask;
int i, maxport, pn, nports = 0, ret = 0;
unsigned int m_port;
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) {
slave = s_rt->slave;
list_for_each_entry(p_rt, &s_rt->port_list, port_node) {
m_port = slave->m_port_map[p_rt->num];
/* Port numbers start from 1 - 14*/
if (m_port)
pn = m_port;
else
pn = find_first_zero_bit(port_mask, maxport);
if (pn > maxport) {
dev_err(ctrl->dev, "All ports busy\n");
ret = -EBUSY;
goto err;
}
set_bit(pn, port_mask);
pconfig[nports].num = pn;
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, 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 void *qcom_swrm_get_sdw_stream(struct snd_soc_dai *dai, int direction)
{
struct qcom_swrm_ctrl *ctrl = dev_get_drvdata(dai->dev);
return ctrl->sruntime[dai->id];
}
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;
struct snd_soc_dai *codec_dai;
int ret, i;
ret = pm_runtime_resume_and_get(ctrl->dev);
if (ret < 0 && ret != -EACCES) {
dev_err_ratelimited(ctrl->dev,
"pm_runtime_resume_and_get failed in %s, ret %d\n",
__func__, ret);
return ret;
}
sruntime = sdw_alloc_stream(dai->name);
if (!sruntime)
return -ENOMEM;
ctrl->sruntime[dai->id] = sruntime;
for_each_rtd_codec_dais(rtd, i, codec_dai) {
ret = snd_soc_dai_set_stream(codec_dai, sruntime,
substream->stream);
if (ret < 0 && ret != -ENOTSUPP) {
dev_err(dai->dev, "Failed to set sdw stream on %s\n",
codec_dai->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;
pm_runtime_mark_last_busy(ctrl->dev);
pm_runtime_put_autosuspend(ctrl->dev);
}
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_stream = qcom_swrm_set_sdw_stream,
.get_stream = qcom_swrm_get_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];
u8 bp_mode[QCOM_SDW_MAX_PORTS] = { 0, };
u8 hstart[QCOM_SDW_MAX_PORTS];
u8 hstop[QCOM_SDW_MAX_PORTS];
u8 word_length[QCOM_SDW_MAX_PORTS];
u8 blk_group_count[QCOM_SDW_MAX_PORTS];
u8 lane_control[QCOM_SDW_MAX_PORTS];
int i, ret, nports, val;
ctrl->reg_read(ctrl, SWRM_COMP_PARAMS, &val);
ctrl->num_dout_ports = FIELD_GET(SWRM_COMP_PARAMS_DOUT_PORTS_MASK, val);
ctrl->num_din_ports = FIELD_GET(SWRM_COMP_PARAMS_DIN_PORTS_MASK, val);
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;
/* Valid port numbers are from 1-14, so mask out port 0 explicitly */
set_bit(0, &ctrl->dout_port_mask);
set_bit(0, &ctrl->din_port_mask);
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;
ret = of_property_read_u8_array(np, "qcom,ports-block-pack-mode",
bp_mode, nports);
if (ret) {
if (ctrl->version <= 0x01030000)
memset(bp_mode, SWR_INVALID_PARAM, QCOM_SDW_MAX_PORTS);
else
return ret;
}
memset(hstart, SWR_INVALID_PARAM, QCOM_SDW_MAX_PORTS);
of_property_read_u8_array(np, "qcom,ports-hstart", hstart, nports);
memset(hstop, SWR_INVALID_PARAM, QCOM_SDW_MAX_PORTS);
of_property_read_u8_array(np, "qcom,ports-hstop", hstop, nports);
memset(word_length, SWR_INVALID_PARAM, QCOM_SDW_MAX_PORTS);
of_property_read_u8_array(np, "qcom,ports-word-length", word_length, nports);
memset(blk_group_count, SWR_INVALID_PARAM, QCOM_SDW_MAX_PORTS);
of_property_read_u8_array(np, "qcom,ports-block-group-count", blk_group_count, nports);
memset(lane_control, SWR_INVALID_PARAM, QCOM_SDW_MAX_PORTS);
of_property_read_u8_array(np, "qcom,ports-lane-control", lane_control, nports);
for (i = 0; i < nports; i++) {
/* Valid port number range is from 1-14 */
ctrl->pconfig[i + 1].si = si[i];
ctrl->pconfig[i + 1].off1 = off1[i];
ctrl->pconfig[i + 1].off2 = off2[i];
ctrl->pconfig[i + 1].bp_mode = bp_mode[i];
ctrl->pconfig[i + 1].hstart = hstart[i];
ctrl->pconfig[i + 1].hstop = hstop[i];
ctrl->pconfig[i + 1].word_length = word_length[i];
ctrl->pconfig[i + 1].blk_group_count = blk_group_count[i];
ctrl->pconfig[i + 1].lane_control = lane_control[i];
}
return 0;
}
#ifdef CONFIG_DEBUG_FS
static int swrm_reg_show(struct seq_file *s_file, void *data)
{
struct qcom_swrm_ctrl *swrm = s_file->private;
int reg, reg_val, ret;
ret = pm_runtime_resume_and_get(swrm->dev);
if (ret < 0 && ret != -EACCES) {
dev_err_ratelimited(swrm->dev,
"pm_runtime_resume_and_get failed in %s, ret %d\n",
__func__, ret);
return ret;
}
for (reg = 0; reg <= SWR_MSTR_MAX_REG_ADDR; reg += 4) {
swrm->reg_read(swrm, reg, &reg_val);
seq_printf(s_file, "0x%.3x: 0x%.2x\n", reg, reg_val);
}
pm_runtime_mark_last_busy(swrm->dev);
pm_runtime_put_autosuspend(swrm->dev);
return 0;
}
DEFINE_SHOW_ATTRIBUTE(swrm_reg);
#endif
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;
const struct qcom_swrm_data *data;
int ret;
u32 val;
ctrl = devm_kzalloc(dev, sizeof(*ctrl), GFP_KERNEL);
if (!ctrl)
return -ENOMEM;
data = of_device_get_match_data(dev);
ctrl->rows_index = sdw_find_row_index(data->default_rows);
ctrl->cols_index = sdw_find_col_index(data->default_cols);
#if IS_REACHABLE(CONFIG_SLIMBUS)
if (dev->parent->bus == &slimbus_bus) {
#else
if (false) {
#endif
ctrl->reg_read = qcom_swrm_ahb_reg_read;
ctrl->reg_write = qcom_swrm_ahb_reg_write;
ctrl->regmap = dev_get_regmap(dev->parent, NULL);
if (!ctrl->regmap)
return -EINVAL;
} else {
ctrl->reg_read = qcom_swrm_cpu_reg_read;
ctrl->reg_write = qcom_swrm_cpu_reg_write;
ctrl->mmio = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(ctrl->mmio))
return PTR_ERR(ctrl->mmio);
}
if (data->sw_clk_gate_required) {
ctrl->audio_cgcr = devm_reset_control_get_exclusive(dev, "swr_audio_cgcr");
if (IS_ERR_OR_NULL(ctrl->audio_cgcr)) {
dev_err(dev, "Failed to get cgcr reset ctrl required for SW gating\n");
ret = PTR_ERR(ctrl->audio_cgcr);
goto err_init;
}
}
ctrl->irq = of_irq_get(dev->of_node, 0);
if (ctrl->irq < 0) {
ret = ctrl->irq;
goto err_init;
}
ctrl->hclk = devm_clk_get(dev, "iface");
if (IS_ERR(ctrl->hclk)) {
ret = PTR_ERR(ctrl->hclk);
goto err_init;
}
clk_prepare_enable(ctrl->hclk);
ctrl->dev = dev;
dev_set_drvdata(&pdev->dev, ctrl);
mutex_init(&ctrl->port_lock);
init_completion(&ctrl->broadcast);
init_completion(&ctrl->enumeration);
ctrl->bus.ops = &qcom_swrm_ops;
ctrl->bus.port_ops = &qcom_swrm_port_ops;
ctrl->bus.compute_params = &qcom_swrm_compute_params;
ctrl->bus.clk_stop_timeout = 300;
ret = qcom_swrm_get_port_config(ctrl);
if (ret)
goto err_clk;
params = &ctrl->bus.params;
params->max_dr_freq = DEFAULT_CLK_FREQ;
params->curr_dr_freq = DEFAULT_CLK_FREQ;
params->col = data->default_cols;
params->row = data->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 = data->default_cols;
prop->default_row = data->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 |
IRQF_ONESHOT,
"soundwire", ctrl);
if (ret) {
dev_err(dev, "Failed to request soundwire irq\n");
goto err_clk;
}
ctrl->wake_irq = of_irq_get(dev->of_node, 1);
if (ctrl->wake_irq > 0) {
ret = devm_request_threaded_irq(dev, ctrl->wake_irq, NULL,
qcom_swrm_wake_irq_handler,
IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
"swr_wake_irq", ctrl);
if (ret) {
dev_err(dev, "Failed to request soundwire wake irq\n");
goto err_init;
}
}
ret = sdw_bus_master_add(&ctrl->bus, dev, dev->fwnode);
if (ret) {
dev_err(dev, "Failed to register Soundwire controller (%d)\n",
ret);
goto err_clk;
}
qcom_swrm_init(ctrl);
wait_for_completion_timeout(&ctrl->enumeration,
msecs_to_jiffies(TIMEOUT_MS));
ret = qcom_swrm_register_dais(ctrl);
if (ret)
goto err_master_add;
dev_info(dev, "Qualcomm Soundwire controller v%x.%x.%x Registered\n",
(ctrl->version >> 24) & 0xff, (ctrl->version >> 16) & 0xff,
ctrl->version & 0xffff);
pm_runtime_set_autosuspend_delay(dev, 3000);
pm_runtime_use_autosuspend(dev);
pm_runtime_mark_last_busy(dev);
pm_runtime_set_active(dev);
pm_runtime_enable(dev);
/* Clk stop is not supported on WSA Soundwire masters */
if (ctrl->version <= 0x01030000) {
ctrl->clock_stop_not_supported = true;
} else {
ctrl->reg_read(ctrl, SWRM_COMP_MASTER_ID, &val);
if (val == MASTER_ID_WSA)
ctrl->clock_stop_not_supported = true;
}
#ifdef CONFIG_DEBUG_FS
ctrl->debugfs = debugfs_create_dir("qualcomm-sdw", ctrl->bus.debugfs);
debugfs_create_file("qualcomm-registers", 0400, ctrl->debugfs, ctrl,
&swrm_reg_fops);
#endif
return 0;
err_master_add:
sdw_bus_master_delete(&ctrl->bus);
err_clk:
clk_disable_unprepare(ctrl->hclk);
err_init:
return ret;
}
static int qcom_swrm_remove(struct platform_device *pdev)
{
struct qcom_swrm_ctrl *ctrl = dev_get_drvdata(&pdev->dev);
sdw_bus_master_delete(&ctrl->bus);
clk_disable_unprepare(ctrl->hclk);
return 0;
}
static bool swrm_wait_for_frame_gen_enabled(struct qcom_swrm_ctrl *swrm)
{
int retry = SWRM_LINK_STATUS_RETRY_CNT;
int comp_sts;
do {
swrm->reg_read(swrm, SWRM_COMP_STATUS, &comp_sts);
if (comp_sts & SWRM_FRM_GEN_ENABLED)
return true;
usleep_range(500, 510);
} while (retry--);
dev_err(swrm->dev, "%s: link status not %s\n", __func__,
comp_sts & SWRM_FRM_GEN_ENABLED ? "connected" : "disconnected");
return false;
}
static int __maybe_unused swrm_runtime_resume(struct device *dev)
{
struct qcom_swrm_ctrl *ctrl = dev_get_drvdata(dev);
int ret;
if (ctrl->wake_irq > 0) {
if (!irqd_irq_disabled(irq_get_irq_data(ctrl->wake_irq)))
disable_irq_nosync(ctrl->wake_irq);
}
clk_prepare_enable(ctrl->hclk);
if (ctrl->clock_stop_not_supported) {
reinit_completion(&ctrl->enumeration);
ctrl->reg_write(ctrl, SWRM_COMP_SW_RESET, 0x01);
usleep_range(100, 105);
qcom_swrm_init(ctrl);
usleep_range(100, 105);
if (!swrm_wait_for_frame_gen_enabled(ctrl))
dev_err(ctrl->dev, "link failed to connect\n");
/* wait for hw enumeration to complete */
wait_for_completion_timeout(&ctrl->enumeration,
msecs_to_jiffies(TIMEOUT_MS));
qcom_swrm_get_device_status(ctrl);
sdw_handle_slave_status(&ctrl->bus, ctrl->status);
} else {
reset_control_reset(ctrl->audio_cgcr);
ctrl->reg_write(ctrl, SWRM_MCP_BUS_CTRL, SWRM_MCP_BUS_CLK_START);
ctrl->reg_write(ctrl, SWRM_INTERRUPT_CLEAR,
SWRM_INTERRUPT_STATUS_MASTER_CLASH_DET);
ctrl->intr_mask |= SWRM_INTERRUPT_STATUS_MASTER_CLASH_DET;
ctrl->reg_write(ctrl, SWRM_INTERRUPT_MASK_ADDR, ctrl->intr_mask);
ctrl->reg_write(ctrl, SWRM_INTERRUPT_CPU_EN, ctrl->intr_mask);
usleep_range(100, 105);
if (!swrm_wait_for_frame_gen_enabled(ctrl))
dev_err(ctrl->dev, "link failed to connect\n");
ret = sdw_bus_exit_clk_stop(&ctrl->bus);
if (ret < 0)
dev_err(ctrl->dev, "bus failed to exit clock stop %d\n", ret);
}
return 0;
}
static int __maybe_unused swrm_runtime_suspend(struct device *dev)
{
struct qcom_swrm_ctrl *ctrl = dev_get_drvdata(dev);
int ret;
if (!ctrl->clock_stop_not_supported) {
/* Mask bus clash interrupt */
ctrl->intr_mask &= ~SWRM_INTERRUPT_STATUS_MASTER_CLASH_DET;
ctrl->reg_write(ctrl, SWRM_INTERRUPT_MASK_ADDR, ctrl->intr_mask);
ctrl->reg_write(ctrl, SWRM_INTERRUPT_CPU_EN, ctrl->intr_mask);
/* Prepare slaves for clock stop */
ret = sdw_bus_prep_clk_stop(&ctrl->bus);
if (ret < 0 && ret != -ENODATA) {
dev_err(dev, "prepare clock stop failed %d", ret);
return ret;
}
ret = sdw_bus_clk_stop(&ctrl->bus);
if (ret < 0 && ret != -ENODATA) {
dev_err(dev, "bus clock stop failed %d", ret);
return ret;
}
}
clk_disable_unprepare(ctrl->hclk);
usleep_range(300, 305);
if (ctrl->wake_irq > 0) {
if (irqd_irq_disabled(irq_get_irq_data(ctrl->wake_irq)))
enable_irq(ctrl->wake_irq);
}
return 0;
}
static const struct dev_pm_ops swrm_dev_pm_ops = {
SET_RUNTIME_PM_OPS(swrm_runtime_suspend, swrm_runtime_resume, NULL)
};
static const struct of_device_id qcom_swrm_of_match[] = {
{ .compatible = "qcom,soundwire-v1.3.0", .data = &swrm_v1_3_data },
{ .compatible = "qcom,soundwire-v1.5.1", .data = &swrm_v1_5_data },
{ .compatible = "qcom,soundwire-v1.6.0", .data = &swrm_v1_6_data },
{/* 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,
.pm = &swrm_dev_pm_ops,
}
};
module_platform_driver(qcom_swrm_driver);
MODULE_DESCRIPTION("Qualcomm soundwire driver");
MODULE_LICENSE("GPL v2");
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