diff options
Diffstat (limited to 'drivers/soundwire/qcom.c')
| -rw-r--r-- | drivers/soundwire/qcom.c | 208 |
1 files changed, 205 insertions, 3 deletions
diff --git a/drivers/soundwire/qcom.c b/drivers/soundwire/qcom.c index 54813417ef8e..da1ad7ebb1aa 100644 --- a/drivers/soundwire/qcom.c +++ b/drivers/soundwire/qcom.c @@ -11,8 +11,10 @@ #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/slab.h> +#include <linux/pm_wakeirq.h> #include <linux/slimbus.h> #include <linux/soundwire/sdw.h> #include <linux/soundwire/sdw_registers.h> @@ -20,6 +22,9 @@ #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) @@ -29,6 +34,7 @@ #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) @@ -111,6 +117,13 @@ #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; @@ -142,6 +155,7 @@ struct qcom_swrm_ctrl { u8 rd_cmd_id; int irq; unsigned int version; + int wake_irq; int num_din_ports; int num_dout_ports; int cols_index; @@ -159,6 +173,7 @@ struct qcom_swrm_ctrl { u32 slave_status; u32 wr_fifo_depth; u32 rd_fifo_depth; + bool clock_stop_not_supported; }; struct qcom_swrm_data { @@ -166,12 +181,12 @@ struct qcom_swrm_data { u32 default_rows; }; -static struct qcom_swrm_data swrm_v1_3_data = { +static const struct qcom_swrm_data swrm_v1_3_data = { .default_rows = 48, .default_cols = 16, }; -static struct qcom_swrm_data swrm_v1_5_data = { +static const struct qcom_swrm_data swrm_v1_5_data = { .default_rows = 50, .default_cols = 16, }; @@ -490,6 +505,30 @@ static int qcom_swrm_enumerate(struct sdw_bus *bus) 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_get_sync(swrm->dev); + if (ret < 0 && ret != -EACCES) { + dev_err_ratelimited(swrm->dev, + "pm_runtime_get_sync failed in %s, ret %d\n", + __func__, ret); + pm_runtime_put_noidle(swrm->dev); + } + + 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; @@ -497,6 +536,7 @@ static irqreturn_t qcom_swrm_irq_handler(int irq, void *dev_id) 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; @@ -604,6 +644,7 @@ static irqreturn_t qcom_swrm_irq_handler(int irq, void *dev_id) intr_sts_masked = intr_sts & swrm->intr_mask; } while (intr_sts_masked); + clk_disable_unprepare(swrm->hclk); return ret; } @@ -1017,6 +1058,15 @@ static int qcom_swrm_startup(struct snd_pcm_substream *substream, struct snd_soc_dai *codec_dai; int ret, i; + ret = pm_runtime_get_sync(ctrl->dev); + if (ret < 0 && ret != -EACCES) { + dev_err_ratelimited(ctrl->dev, + "pm_runtime_get_sync failed in %s, ret %d\n", + __func__, ret); + pm_runtime_put_noidle(ctrl->dev); + return ret; + } + sruntime = sdw_alloc_stream(dai->name); if (!sruntime) return -ENOMEM; @@ -1044,6 +1094,9 @@ static void qcom_swrm_shutdown(struct snd_pcm_substream *substream, 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 = { @@ -1197,12 +1250,23 @@ static int qcom_swrm_get_port_config(struct qcom_swrm_ctrl *ctrl) static int swrm_reg_show(struct seq_file *s_file, void *data) { struct qcom_swrm_ctrl *swrm = s_file->private; - int reg, reg_val; + int reg, reg_val, ret; + + ret = pm_runtime_get_sync(swrm->dev); + if (ret < 0 && ret != -EACCES) { + dev_err_ratelimited(swrm->dev, + "pm_runtime_get_sync failed in %s, ret %d\n", + __func__, ret); + pm_runtime_put_noidle(swrm->dev); + } for (reg = 0; reg <= SWR_MSTR_MAX_REG_ADDR; reg += 4) { swrm->reg_read(swrm, 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; } @@ -1267,6 +1331,7 @@ static int qcom_swrm_probe(struct platform_device *pdev) 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) @@ -1301,6 +1366,18 @@ static int qcom_swrm_probe(struct platform_device *pdev) 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", @@ -1319,6 +1396,21 @@ static int qcom_swrm_probe(struct platform_device *pdev) (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, @@ -1345,6 +1437,115 @@ static int qcom_swrm_remove(struct platform_device *pdev) 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 { + 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 }, @@ -1359,6 +1560,7 @@ static struct platform_driver qcom_swrm_driver = { .driver = { .name = "qcom-soundwire", .of_match_table = qcom_swrm_of_match, + .pm = &swrm_dev_pm_ops, } }; module_platform_driver(qcom_swrm_driver); |