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-rw-r--r--drivers/soundwire/qcom.c1616
1 files changed, 1616 insertions, 0 deletions
diff --git a/drivers/soundwire/qcom.c b/drivers/soundwire/qcom.c
new file mode 100644
index 000000000..a51c8a670
--- /dev/null
+++ b/drivers/soundwire/qcom.c
@@ -0,0 +1,1616 @@
+// 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;
+ /* Port numbers are 1 - 14 */
+ struct qcom_swrm_port_config pconfig[QCOM_SDW_MAX_PORTS + 1];
+ 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;
+
+ if (cmd_id == SWR_BROADCAST_CMD_ID)
+ reinit_completion(&swrm->broadcast);
+
+ /* 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);
+
+ /*
+ * Check for outstanding cmd wrt. write fifo depth to avoid
+ * overflow as read will also increase write fifo cnt.
+ */
+ swrm_wait_for_wr_fifo_avail(swrm);
+
+ /* 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 & SWRM_MCP_SLV_STATUS_MASK;
+ 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) {
+ ret = -ENOMEM;
+ goto err_alloc;
+ }
+
+ 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);
+ goto err_set_stream;
+ }
+ }
+
+ return 0;
+
+err_set_stream:
+ sdw_release_stream(sruntime);
+err_alloc:
+ pm_runtime_mark_last_busy(ctrl->dev);
+ pm_runtime_put_autosuspend(ctrl->dev);
+
+ return ret;
+}
+
+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;
+ if (nports > QCOM_SDW_MAX_PORTS)
+ return -EINVAL;
+
+ /* 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");