diff options
| -rw-r--r-- | drivers/usb/phy/phy-msm-qusb.c | 238 |
1 files changed, 236 insertions, 2 deletions
diff --git a/drivers/usb/phy/phy-msm-qusb.c b/drivers/usb/phy/phy-msm-qusb.c index f97d550e0381..ae72ec6b3d19 100644 --- a/drivers/usb/phy/phy-msm-qusb.c +++ b/drivers/usb/phy/phy-msm-qusb.c @@ -170,6 +170,10 @@ struct qusb_phy { struct regulator_desc dpdm_rdesc; struct regulator_dev *dpdm_rdev; + bool dpdm_pulsing_enabled; + struct power_supply *dpdm_psy; + struct power_supply_desc dpdm_psy_desc; + /* emulation targets specific */ void __iomem *emu_phy_base; bool emulation; @@ -181,6 +185,11 @@ struct qusb_phy { int emu_dcm_reset_seq_len; bool put_into_high_z_state; struct mutex phy_lock; + spinlock_t pulse_lock; +}; + +static enum power_supply_property dpdm_props[] = { + POWER_SUPPLY_PROP_DP_DM, }; static void qusb_phy_enable_clocks(struct qusb_phy *qphy, bool on) @@ -345,10 +354,13 @@ err_vdd: return ret; } +#define PHY_PULSE_TIME_USEC 250 static int qusb_phy_update_dpdm(struct usb_phy *phy, int value) { struct qusb_phy *qphy = container_of(phy, struct qusb_phy, phy); int ret = 0; + unsigned long flags; + u32 reg; dev_dbg(phy->dev, "%s value:%d rm_pulldown:%d\n", __func__, value, qphy->rm_pulldown); @@ -407,6 +419,21 @@ static int qusb_phy_update_dpdm(struct usb_phy *phy, int value) qusb_phy_enable_clocks(qphy, false); } } + + /* Clear QC1 and QC2 registers when rm_pulldown = 1 */ + if (qphy->dpdm_pulsing_enabled && qphy->rm_pulldown) { + dev_dbg(phy->dev, "clearing qc1 and qc2 registers.\n"); + ret = clk_prepare_enable(qphy->cfg_ahb_clk); + if (ret) + goto clk_error; + + /* Clear qc1 and qc2 registers */ + writel_relaxed(0x00, qphy->base + QUSB2PHY_PORT_QC1); + writel_relaxed(0x00, qphy->base + QUSB2PHY_PORT_QC2); + /* to make sure above write goes through */ + mb(); + clk_disable_unprepare(qphy->cfg_ahb_clk); + } mutex_unlock(&qphy->phy_lock); break; @@ -415,6 +442,22 @@ static int qusb_phy_update_dpdm(struct usb_phy *phy, int value) dev_dbg(phy->dev, "POWER_SUPPLY_DP_DM_DPR_DMR\n"); mutex_lock(&qphy->phy_lock); if (qphy->rm_pulldown) { + dev_dbg(phy->dev, "clearing qc1 and qc2 registers.\n"); + if (qphy->dpdm_pulsing_enabled) { + ret = clk_prepare_enable(qphy->cfg_ahb_clk); + if (ret) + goto clk_error; + + /* Clear qc1 and qc2 registers */ + writel_relaxed(0x00, + qphy->base + QUSB2PHY_PORT_QC1); + writel_relaxed(0x00, + qphy->base + QUSB2PHY_PORT_QC2); + /* to make sure above write goes through */ + mb(); + clk_disable_unprepare(qphy->cfg_ahb_clk); + } + if (!qphy->cable_connected) { if (qphy->tcsr_clamp_dig_n) writel_relaxed(0x0, @@ -431,15 +474,172 @@ static int qusb_phy_update_dpdm(struct usb_phy *phy, int value) mutex_unlock(&qphy->phy_lock); break; + case POWER_SUPPLY_DP_DM_DP0P6_DMF: + if (!qphy->dpdm_pulsing_enabled) + break; + + dev_dbg(phy->dev, "POWER_SUPPLY_DP_DM_DP0P6_DMF\n"); + ret = clk_prepare_enable(qphy->cfg_ahb_clk); + if (ret) + goto clk_error; + + /* Set DP to 0.6v and DM to High Z state */ + writel_relaxed(VDP_SRC_EN, qphy->base + QUSB2PHY_PORT_QC1); + /* complete above write */ + mb(); + clk_disable_unprepare(qphy->cfg_ahb_clk); + break; + + case POWER_SUPPLY_DP_DM_DP0P6_DM3P3: + if (!qphy->dpdm_pulsing_enabled) + break; + + dev_dbg(phy->dev, "POWER_SUPPLY_DP_DM_DP0PHVDCP_36_DM3P3\n"); + ret = clk_prepare_enable(qphy->cfg_ahb_clk); + if (ret) + goto clk_error; + + /* Set DP to 0.6v */ + writel_relaxed(VDP_SRC_EN, qphy->base + QUSB2PHY_PORT_QC1); + /* Set DM to 3.075v */ + writel_relaxed(RPUM_LOW_EN | RDM_UP_EN, + qphy->base + QUSB2PHY_PORT_QC2); + /* complete above write */ + mb(); + clk_disable_unprepare(qphy->cfg_ahb_clk); + break; + + case POWER_SUPPLY_DP_DM_DP_PULSE: + if (!qphy->dpdm_pulsing_enabled) + break; + + dev_dbg(phy->dev, "POWER_SUPPLY_DP_DM_DP_PULSE\n"); + ret = clk_prepare_enable(qphy->cfg_ahb_clk); + if (ret) + goto clk_error; + + spin_lock_irqsave(&qphy->pulse_lock, flags); + /*Set DP to 3.075v, sleep for .25 ms */ + reg = readl_relaxed(qphy->base + QUSB2PHY_PORT_QC2); + reg |= (RDP_UP_EN | RPUP_LOW_EN); + writel_relaxed(reg, qphy->base + QUSB2PHY_PORT_QC2); + + /* complete above write */ + mb(); + + /* + * It is recommended to wait here to get voltage change on + * DP/DM line. + */ + udelay(PHY_PULSE_TIME_USEC); + + /* Set DP to 0.6v, sleep 2-3ms */ + reg = readl_relaxed(qphy->base + QUSB2PHY_PORT_QC1); + reg |= VDP_SRC_EN; + writel_relaxed(reg, qphy->base + QUSB2PHY_PORT_QC1); + + reg = readl_relaxed(qphy->base + QUSB2PHY_PORT_QC2); + reg &= ~(RDP_UP_EN | RPUP_LOW_EN); + writel_relaxed(reg, qphy->base + QUSB2PHY_PORT_QC2); + /* complete above write */ + mb(); + spin_unlock_irqrestore(&qphy->pulse_lock, flags); + /* + * It is recommended to wait here to get voltage change on + * DP/DM line. + */ + usleep_range(2000, 3000); + clk_disable_unprepare(qphy->cfg_ahb_clk); + break; + + case POWER_SUPPLY_DP_DM_DM_PULSE: + if (!qphy->dpdm_pulsing_enabled) + break; + + dev_dbg(phy->dev, "POWER_SUPPLY_DP_DM_DM_PULSE\n"); + ret = clk_prepare_enable(qphy->cfg_ahb_clk); + if (ret) + goto clk_error; + + spin_lock_irqsave(&qphy->pulse_lock, flags); + /* Set DM to 0.6v, sleep .25 ms */ + reg = readl_relaxed(qphy->base + QUSB2PHY_PORT_QC1); + reg |= VDM_SRC_EN; + writel_relaxed(reg, qphy->base + QUSB2PHY_PORT_QC1); + + reg = readl_relaxed(qphy->base + QUSB2PHY_PORT_QC2); + reg &= ~(RDM_UP_EN | RPUM_LOW_EN); + writel_relaxed(reg, qphy->base + QUSB2PHY_PORT_QC2); + + /* complete above write */ + mb(); + + /* + * It is recommended to wait here to get voltage change on + * DP/DM line. + */ + udelay(PHY_PULSE_TIME_USEC); + + /* DM to 3.075v, sleep 2-3ms */ + reg = readl_relaxed(qphy->base + QUSB2PHY_PORT_QC2); + reg |= (RPUM_LOW_EN | RDM_UP_EN); + writel_relaxed(reg, qphy->base + QUSB2PHY_PORT_QC2); + + reg = readl_relaxed(qphy->base + QUSB2PHY_PORT_QC1); + reg &= ~VDM_SRC_EN; + writel_relaxed(reg, qphy->base + QUSB2PHY_PORT_QC1); + + /* complete above write */ + mb(); + spin_unlock_irqrestore(&qphy->pulse_lock, flags); + + /* + * It is recommended to wait here to get voltage change on + * DP/DM line. + */ + usleep_range(2000, 3000); + clk_disable_unprepare(qphy->cfg_ahb_clk); + break; default: ret = -EINVAL; dev_err(phy->dev, "Invalid power supply property(%d)\n", value); break; } +clk_error: return ret; } +static int qusb_phy_get_property_usb(struct power_supply *psy, + enum power_supply_property psp, + union power_supply_propval *val) +{ + return -EINVAL; +} + +static int qusb_phy_set_property_usb(struct power_supply *psy, + enum power_supply_property prop, + const union power_supply_propval *val) +{ + struct qusb_phy *qphy = power_supply_get_drvdata(psy); + int ret = 0; + + switch (prop) { + case POWER_SUPPLY_PROP_DP_DM: + ret = qusb_phy_update_dpdm(&qphy->phy, val->intval); + if (ret) { + dev_dbg(qphy->phy.dev, "error in dpdm update: %d\n", + ret); + return ret; + } + break; + default: + return -EINVAL; + } + + return 0; +} + static void qusb_phy_get_tune2_param(struct qusb_phy *qphy) { u8 num_of_bits; @@ -993,6 +1193,7 @@ static int qusb_phy_probe(struct platform_device *pdev) int ret = 0, size = 0; const char *phy_type; bool hold_phy_reset; + struct power_supply_config dpdm_cfg = {}; qphy = devm_kzalloc(dev, sizeof(*qphy), GFP_KERNEL); if (!qphy) @@ -1232,6 +1433,7 @@ static int qusb_phy_probe(struct platform_device *pdev) } mutex_init(&qphy->phy_lock); + spin_lock_init(&qphy->pulse_lock); platform_set_drvdata(pdev, qphy); qphy->phy.label = "msm-qusb-phy"; @@ -1254,25 +1456,57 @@ static int qusb_phy_probe(struct platform_device *pdev) dev_err(dev, "%s:phy_reset assert failed\n", __func__); } + qphy->dpdm_pulsing_enabled = of_property_read_bool(dev->of_node, + "qcom,enable-dpdm-pulsing"); + + if (qphy->dpdm_pulsing_enabled) { + qphy->dpdm_psy_desc.name = "dpdm"; + qphy->dpdm_psy_desc.type = POWER_SUPPLY_TYPE_USB; + qphy->dpdm_psy_desc.properties = dpdm_props; + qphy->dpdm_psy_desc.num_properties = ARRAY_SIZE(dpdm_props); + qphy->dpdm_psy_desc.set_property = qusb_phy_set_property_usb; + qphy->dpdm_psy_desc.get_property = qusb_phy_get_property_usb; + + dpdm_cfg.drv_data = qphy; + dpdm_cfg.of_node = dev->of_node; + qphy->dpdm_psy = power_supply_register(&pdev->dev, + &qphy->dpdm_psy_desc, &dpdm_cfg); + if (IS_ERR(qphy->dpdm_psy)) { + dev_err(&pdev->dev, "%s:dpdm power_supply_register failed\n", + __func__); + return PTR_ERR(qphy->dpdm_psy); + } + } + ret = usb_add_phy_dev(&qphy->phy); if (ret) - return ret; + goto unregister_psy; ret = qusb_phy_regulator_init(qphy); if (ret) - usb_remove_phy(&qphy->phy); + goto remove_phy; /* de-assert clamp dig n to reduce leakage on 1p8 upon boot up */ if (qphy->tcsr_clamp_dig_n) writel_relaxed(0x0, qphy->tcsr_clamp_dig_n); return ret; + +remove_phy: + usb_remove_phy(&qphy->phy); +unregister_psy: + if (qphy->dpdm_psy) + power_supply_unregister(qphy->dpdm_psy); + + return ret; } static int qusb_phy_remove(struct platform_device *pdev) { struct qusb_phy *qphy = platform_get_drvdata(pdev); + if (qphy->dpdm_psy) + power_supply_unregister(qphy->dpdm_psy); usb_remove_phy(&qphy->phy); if (qphy->clocks_enabled) { |