| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Ansuel Smith | 2081 | 99.66% | 3 | 50.00% |
| Wei Yongjun | 3 | 0.14% | 1 | 16.67% |
| Vinod Koul | 3 | 0.14% | 1 | 16.67% |
| Colin Ian King | 1 | 0.05% | 1 | 16.67% |
| Total | 2088 | 6 |
// SPDX-License-Identifier: GPL-2.0-only #include <linux/clk.h> #include <linux/err.h> #include <linux/io.h> #include <linux/module.h> #include <linux/of_device.h> #include <linux/phy/phy.h> #include <linux/platform_device.h> #include <linux/delay.h> #include <linux/regmap.h> #include <linux/mfd/syscon.h> #include <linux/bitfield.h> /* USB QSCRATCH Hardware registers */ #define QSCRATCH_GENERAL_CFG (0x08) #define HSUSB_PHY_CTRL_REG (0x10) /* PHY_CTRL_REG */ #define HSUSB_CTRL_DMSEHV_CLAMP BIT(24) #define HSUSB_CTRL_USB2_SUSPEND BIT(23) #define HSUSB_CTRL_UTMI_CLK_EN BIT(21) #define HSUSB_CTRL_UTMI_OTG_VBUS_VALID BIT(20) #define HSUSB_CTRL_USE_CLKCORE BIT(18) #define HSUSB_CTRL_DPSEHV_CLAMP BIT(17) #define HSUSB_CTRL_COMMONONN BIT(11) #define HSUSB_CTRL_ID_HV_CLAMP BIT(9) #define HSUSB_CTRL_OTGSESSVLD_CLAMP BIT(8) #define HSUSB_CTRL_CLAMP_EN BIT(7) #define HSUSB_CTRL_RETENABLEN BIT(1) #define HSUSB_CTRL_POR BIT(0) /* QSCRATCH_GENERAL_CFG */ #define HSUSB_GCFG_XHCI_REV BIT(2) /* USB QSCRATCH Hardware registers */ #define SSUSB_PHY_CTRL_REG (0x00) #define SSUSB_PHY_PARAM_CTRL_1 (0x04) #define SSUSB_PHY_PARAM_CTRL_2 (0x08) #define CR_PROTOCOL_DATA_IN_REG (0x0c) #define CR_PROTOCOL_DATA_OUT_REG (0x10) #define CR_PROTOCOL_CAP_ADDR_REG (0x14) #define CR_PROTOCOL_CAP_DATA_REG (0x18) #define CR_PROTOCOL_READ_REG (0x1c) #define CR_PROTOCOL_WRITE_REG (0x20) /* PHY_CTRL_REG */ #define SSUSB_CTRL_REF_USE_PAD BIT(28) #define SSUSB_CTRL_TEST_POWERDOWN BIT(27) #define SSUSB_CTRL_LANE0_PWR_PRESENT BIT(24) #define SSUSB_CTRL_SS_PHY_EN BIT(8) #define SSUSB_CTRL_SS_PHY_RESET BIT(7) /* SSPHY control registers - Does this need 0x30? */ #define SSPHY_CTRL_RX_OVRD_IN_HI(lane) (0x1006 + 0x100 * (lane)) #define SSPHY_CTRL_TX_OVRD_DRV_LO(lane) (0x1002 + 0x100 * (lane)) /* SSPHY SoC version specific values */ #define SSPHY_RX_EQ_VALUE 4 /* Override value for rx_eq */ /* Override value for transmit preemphasis */ #define SSPHY_TX_DEEMPH_3_5DB 23 /* Override value for mpll */ #define SSPHY_MPLL_VALUE 0 /* QSCRATCH PHY_PARAM_CTRL1 fields */ #define PHY_PARAM_CTRL1_TX_FULL_SWING_MASK GENMASK(26, 19) #define PHY_PARAM_CTRL1_TX_DEEMPH_6DB_MASK GENMASK(19, 13) #define PHY_PARAM_CTRL1_TX_DEEMPH_3_5DB_MASK GENMASK(13, 7) #define PHY_PARAM_CTRL1_LOS_BIAS_MASK GENMASK(7, 2) #define PHY_PARAM_CTRL1_MASK \ (PHY_PARAM_CTRL1_TX_FULL_SWING_MASK | \ PHY_PARAM_CTRL1_TX_DEEMPH_6DB_MASK | \ PHY_PARAM_CTRL1_TX_DEEMPH_3_5DB_MASK | \ PHY_PARAM_CTRL1_LOS_BIAS_MASK) #define PHY_PARAM_CTRL1_TX_FULL_SWING(x) \ FIELD_PREP(PHY_PARAM_CTRL1_TX_FULL_SWING_MASK, (x)) #define PHY_PARAM_CTRL1_TX_DEEMPH_6DB(x) \ FIELD_PREP(PHY_PARAM_CTRL1_TX_DEEMPH_6DB_MASK, (x)) #define PHY_PARAM_CTRL1_TX_DEEMPH_3_5DB(x) \ FIELD_PREP(PHY_PARAM_CTRL1_TX_DEEMPH_3_5DB_MASK, x) #define PHY_PARAM_CTRL1_LOS_BIAS(x) \ FIELD_PREP(PHY_PARAM_CTRL1_LOS_BIAS_MASK, (x)) /* RX OVRD IN HI bits */ #define RX_OVRD_IN_HI_RX_RESET_OVRD BIT(13) #define RX_OVRD_IN_HI_RX_RX_RESET BIT(12) #define RX_OVRD_IN_HI_RX_EQ_OVRD BIT(11) #define RX_OVRD_IN_HI_RX_EQ_MASK GENMASK(10, 7) #define RX_OVRD_IN_HI_RX_EQ(x) FIELD_PREP(RX_OVRD_IN_HI_RX_EQ_MASK, (x)) #define RX_OVRD_IN_HI_RX_EQ_EN_OVRD BIT(7) #define RX_OVRD_IN_HI_RX_EQ_EN BIT(6) #define RX_OVRD_IN_HI_RX_LOS_FILTER_OVRD BIT(5) #define RX_OVRD_IN_HI_RX_LOS_FILTER_MASK GENMASK(4, 2) #define RX_OVRD_IN_HI_RX_RATE_OVRD BIT(2) #define RX_OVRD_IN_HI_RX_RATE_MASK GENMASK(2, 0) /* TX OVRD DRV LO register bits */ #define TX_OVRD_DRV_LO_AMPLITUDE_MASK GENMASK(6, 0) #define TX_OVRD_DRV_LO_PREEMPH_MASK GENMASK(13, 6) #define TX_OVRD_DRV_LO_PREEMPH(x) ((x) << 7) #define TX_OVRD_DRV_LO_EN BIT(14) /* MPLL bits */ #define SSPHY_MPLL_MASK GENMASK(8, 5) #define SSPHY_MPLL(x) ((x) << 5) /* SS CAP register bits */ #define SS_CR_CAP_ADDR_REG BIT(0) #define SS_CR_CAP_DATA_REG BIT(0) #define SS_CR_READ_REG BIT(0) #define SS_CR_WRITE_REG BIT(0) #define LATCH_SLEEP 40 #define LATCH_TIMEOUT 100 struct usb_phy { void __iomem *base; struct device *dev; struct clk *xo_clk; struct clk *ref_clk; u32 rx_eq; u32 tx_deamp_3_5db; u32 mpll; }; struct phy_drvdata { struct phy_ops ops; u32 clk_rate; }; /** * usb_phy_write_readback() - Write register and read back masked value to * confirm it is written * * @phy_dwc3: QCOM DWC3 phy context * @offset: register offset. * @mask: register bitmask specifying what should be updated * @val: value to write. */ static inline void usb_phy_write_readback(struct usb_phy *phy_dwc3, u32 offset, const u32 mask, u32 val) { u32 write_val, tmp = readl(phy_dwc3->base + offset); tmp &= ~mask; /* retain other bits */ write_val = tmp | val; writel(write_val, phy_dwc3->base + offset); /* Read back to see if val was written */ tmp = readl(phy_dwc3->base + offset); tmp &= mask; /* clear other bits */ if (tmp != val) dev_err(phy_dwc3->dev, "write: %x to QSCRATCH: %x FAILED\n", val, offset); } static int wait_for_latch(void __iomem *addr) { u32 val; return readl_poll_timeout(addr, val, !val, LATCH_SLEEP, LATCH_TIMEOUT); } /** * usb_ss_write_phycreg() - Write SSPHY register * * @phy_dwc3: QCOM DWC3 phy context * @addr: SSPHY address to write. * @val: value to write. */ static int usb_ss_write_phycreg(struct usb_phy *phy_dwc3, u32 addr, u32 val) { int ret; writel(addr, phy_dwc3->base + CR_PROTOCOL_DATA_IN_REG); writel(SS_CR_CAP_ADDR_REG, phy_dwc3->base + CR_PROTOCOL_CAP_ADDR_REG); ret = wait_for_latch(phy_dwc3->base + CR_PROTOCOL_CAP_ADDR_REG); if (ret) goto err_wait; writel(val, phy_dwc3->base + CR_PROTOCOL_DATA_IN_REG); writel(SS_CR_CAP_DATA_REG, phy_dwc3->base + CR_PROTOCOL_CAP_DATA_REG); ret = wait_for_latch(phy_dwc3->base + CR_PROTOCOL_CAP_DATA_REG); if (ret) goto err_wait; writel(SS_CR_WRITE_REG, phy_dwc3->base + CR_PROTOCOL_WRITE_REG); ret = wait_for_latch(phy_dwc3->base + CR_PROTOCOL_WRITE_REG); err_wait: if (ret) dev_err(phy_dwc3->dev, "timeout waiting for latch\n"); return ret; } /** * usb_ss_read_phycreg() - Read SSPHY register. * * @phy_dwc3: QCOM DWC3 phy context * @addr: SSPHY address to read. * @val: pointer in which read is store. */ static int usb_ss_read_phycreg(struct usb_phy *phy_dwc3, u32 addr, u32 *val) { int ret; writel(addr, phy_dwc3->base + CR_PROTOCOL_DATA_IN_REG); writel(SS_CR_CAP_ADDR_REG, phy_dwc3->base + CR_PROTOCOL_CAP_ADDR_REG); ret = wait_for_latch(phy_dwc3->base + CR_PROTOCOL_CAP_ADDR_REG); if (ret) goto err_wait; /* * Due to hardware bug, first read of SSPHY register might be * incorrect. Hence as workaround, SW should perform SSPHY register * read twice, but use only second read and ignore first read. */ writel(SS_CR_READ_REG, phy_dwc3->base + CR_PROTOCOL_READ_REG); ret = wait_for_latch(phy_dwc3->base + CR_PROTOCOL_READ_REG); if (ret) goto err_wait; /* throwaway read */ readl(phy_dwc3->base + CR_PROTOCOL_DATA_OUT_REG); writel(SS_CR_READ_REG, phy_dwc3->base + CR_PROTOCOL_READ_REG); ret = wait_for_latch(phy_dwc3->base + CR_PROTOCOL_READ_REG); if (ret) goto err_wait; *val = readl(phy_dwc3->base + CR_PROTOCOL_DATA_OUT_REG); err_wait: return ret; } static int qcom_ipq806x_usb_hs_phy_init(struct phy *phy) { struct usb_phy *phy_dwc3 = phy_get_drvdata(phy); int ret; u32 val; ret = clk_prepare_enable(phy_dwc3->xo_clk); if (ret) return ret; ret = clk_prepare_enable(phy_dwc3->ref_clk); if (ret) { clk_disable_unprepare(phy_dwc3->xo_clk); return ret; } /* * HSPHY Initialization: Enable UTMI clock, select 19.2MHz fsel * enable clamping, and disable RETENTION (power-on default is ENABLED) */ val = HSUSB_CTRL_DPSEHV_CLAMP | HSUSB_CTRL_DMSEHV_CLAMP | HSUSB_CTRL_RETENABLEN | HSUSB_CTRL_COMMONONN | HSUSB_CTRL_OTGSESSVLD_CLAMP | HSUSB_CTRL_ID_HV_CLAMP | HSUSB_CTRL_UTMI_OTG_VBUS_VALID | HSUSB_CTRL_UTMI_CLK_EN | HSUSB_CTRL_CLAMP_EN | 0x70; /* use core clock if external reference is not present */ if (!phy_dwc3->xo_clk) val |= HSUSB_CTRL_USE_CLKCORE; writel(val, phy_dwc3->base + HSUSB_PHY_CTRL_REG); usleep_range(2000, 2200); /* Disable (bypass) VBUS and ID filters */ writel(HSUSB_GCFG_XHCI_REV, phy_dwc3->base + QSCRATCH_GENERAL_CFG); return 0; } static int qcom_ipq806x_usb_hs_phy_exit(struct phy *phy) { struct usb_phy *phy_dwc3 = phy_get_drvdata(phy); clk_disable_unprepare(phy_dwc3->ref_clk); clk_disable_unprepare(phy_dwc3->xo_clk); return 0; } static int qcom_ipq806x_usb_ss_phy_init(struct phy *phy) { struct usb_phy *phy_dwc3 = phy_get_drvdata(phy); int ret; u32 data; ret = clk_prepare_enable(phy_dwc3->xo_clk); if (ret) return ret; ret = clk_prepare_enable(phy_dwc3->ref_clk); if (ret) { clk_disable_unprepare(phy_dwc3->xo_clk); return ret; } /* reset phy */ data = readl(phy_dwc3->base + SSUSB_PHY_CTRL_REG); writel(data | SSUSB_CTRL_SS_PHY_RESET, phy_dwc3->base + SSUSB_PHY_CTRL_REG); usleep_range(2000, 2200); writel(data, phy_dwc3->base + SSUSB_PHY_CTRL_REG); /* clear REF_PAD if we don't have XO clk */ if (!phy_dwc3->xo_clk) data &= ~SSUSB_CTRL_REF_USE_PAD; else data |= SSUSB_CTRL_REF_USE_PAD; writel(data, phy_dwc3->base + SSUSB_PHY_CTRL_REG); /* wait for ref clk to become stable, this can take up to 30ms */ msleep(30); data |= SSUSB_CTRL_SS_PHY_EN | SSUSB_CTRL_LANE0_PWR_PRESENT; writel(data, phy_dwc3->base + SSUSB_PHY_CTRL_REG); /* * WORKAROUND: There is SSPHY suspend bug due to which USB enumerates * in HS mode instead of SS mode. Workaround it by asserting * LANE0.TX_ALT_BLOCK.EN_ALT_BUS to enable TX to use alt bus mode */ ret = usb_ss_read_phycreg(phy_dwc3, 0x102D, &data); if (ret) goto err_phy_trans; data |= (1 << 7); ret = usb_ss_write_phycreg(phy_dwc3, 0x102D, data); if (ret) goto err_phy_trans; ret = usb_ss_read_phycreg(phy_dwc3, 0x1010, &data); if (ret) goto err_phy_trans; data &= ~0xff0; data |= 0x20; ret = usb_ss_write_phycreg(phy_dwc3, 0x1010, data); if (ret) goto err_phy_trans; /* * Fix RX Equalization setting as follows * LANE0.RX_OVRD_IN_HI. RX_EQ_EN set to 0 * LANE0.RX_OVRD_IN_HI.RX_EQ_EN_OVRD set to 1 * LANE0.RX_OVRD_IN_HI.RX_EQ set based on SoC version * LANE0.RX_OVRD_IN_HI.RX_EQ_OVRD set to 1 */ ret = usb_ss_read_phycreg(phy_dwc3, SSPHY_CTRL_RX_OVRD_IN_HI(0), &data); if (ret) goto err_phy_trans; data &= ~RX_OVRD_IN_HI_RX_EQ_EN; data |= RX_OVRD_IN_HI_RX_EQ_EN_OVRD; data &= ~RX_OVRD_IN_HI_RX_EQ_MASK; data |= RX_OVRD_IN_HI_RX_EQ(phy_dwc3->rx_eq); data |= RX_OVRD_IN_HI_RX_EQ_OVRD; ret = usb_ss_write_phycreg(phy_dwc3, SSPHY_CTRL_RX_OVRD_IN_HI(0), data); if (ret) goto err_phy_trans; /* * Set EQ and TX launch amplitudes as follows * LANE0.TX_OVRD_DRV_LO.PREEMPH set based on SoC version * LANE0.TX_OVRD_DRV_LO.AMPLITUDE set to 110 * LANE0.TX_OVRD_DRV_LO.EN set to 1. */ ret = usb_ss_read_phycreg(phy_dwc3, SSPHY_CTRL_TX_OVRD_DRV_LO(0), &data); if (ret) goto err_phy_trans; data &= ~TX_OVRD_DRV_LO_PREEMPH_MASK; data |= TX_OVRD_DRV_LO_PREEMPH(phy_dwc3->tx_deamp_3_5db); data &= ~TX_OVRD_DRV_LO_AMPLITUDE_MASK; data |= 0x6E; data |= TX_OVRD_DRV_LO_EN; ret = usb_ss_write_phycreg(phy_dwc3, SSPHY_CTRL_TX_OVRD_DRV_LO(0), data); if (ret) goto err_phy_trans; data = 0; data &= ~SSPHY_MPLL_MASK; data |= SSPHY_MPLL(phy_dwc3->mpll); usb_ss_write_phycreg(phy_dwc3, 0x30, data); /* * Set the QSCRATCH PHY_PARAM_CTRL1 parameters as follows * TX_FULL_SWING [26:20] amplitude to 110 * TX_DEEMPH_6DB [19:14] to 32 * TX_DEEMPH_3_5DB [13:8] set based on SoC version * LOS_BIAS [7:3] to 9 */ data = readl(phy_dwc3->base + SSUSB_PHY_PARAM_CTRL_1); data &= ~PHY_PARAM_CTRL1_MASK; data |= PHY_PARAM_CTRL1_TX_FULL_SWING(0x6e) | PHY_PARAM_CTRL1_TX_DEEMPH_6DB(0x20) | PHY_PARAM_CTRL1_TX_DEEMPH_3_5DB(phy_dwc3->tx_deamp_3_5db) | PHY_PARAM_CTRL1_LOS_BIAS(0x9); usb_phy_write_readback(phy_dwc3, SSUSB_PHY_PARAM_CTRL_1, PHY_PARAM_CTRL1_MASK, data); err_phy_trans: return ret; } static int qcom_ipq806x_usb_ss_phy_exit(struct phy *phy) { struct usb_phy *phy_dwc3 = phy_get_drvdata(phy); /* Sequence to put SSPHY in low power state: * 1. Clear REF_PHY_EN in PHY_CTRL_REG * 2. Clear REF_USE_PAD in PHY_CTRL_REG * 3. Set TEST_POWERED_DOWN in PHY_CTRL_REG to enable PHY retention */ usb_phy_write_readback(phy_dwc3, SSUSB_PHY_CTRL_REG, SSUSB_CTRL_SS_PHY_EN, 0x0); usb_phy_write_readback(phy_dwc3, SSUSB_PHY_CTRL_REG, SSUSB_CTRL_REF_USE_PAD, 0x0); usb_phy_write_readback(phy_dwc3, SSUSB_PHY_CTRL_REG, SSUSB_CTRL_TEST_POWERDOWN, 0x0); clk_disable_unprepare(phy_dwc3->ref_clk); clk_disable_unprepare(phy_dwc3->xo_clk); return 0; } static const struct phy_drvdata qcom_ipq806x_usb_hs_drvdata = { .ops = { .init = qcom_ipq806x_usb_hs_phy_init, .exit = qcom_ipq806x_usb_hs_phy_exit, .owner = THIS_MODULE, }, .clk_rate = 60000000, }; static const struct phy_drvdata qcom_ipq806x_usb_ss_drvdata = { .ops = { .init = qcom_ipq806x_usb_ss_phy_init, .exit = qcom_ipq806x_usb_ss_phy_exit, .owner = THIS_MODULE, }, .clk_rate = 125000000, }; static const struct of_device_id qcom_ipq806x_usb_phy_table[] = { { .compatible = "qcom,ipq806x-usb-phy-hs", .data = &qcom_ipq806x_usb_hs_drvdata }, { .compatible = "qcom,ipq806x-usb-phy-ss", .data = &qcom_ipq806x_usb_ss_drvdata }, { /* Sentinel */ } }; MODULE_DEVICE_TABLE(of, qcom_ipq806x_usb_phy_table); static int qcom_ipq806x_usb_phy_probe(struct platform_device *pdev) { struct resource *res; resource_size_t size; struct phy *generic_phy; struct usb_phy *phy_dwc3; const struct phy_drvdata *data; struct phy_provider *phy_provider; phy_dwc3 = devm_kzalloc(&pdev->dev, sizeof(*phy_dwc3), GFP_KERNEL); if (!phy_dwc3) return -ENOMEM; data = of_device_get_match_data(&pdev->dev); phy_dwc3->dev = &pdev->dev; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) return -EINVAL; size = resource_size(res); phy_dwc3->base = devm_ioremap(phy_dwc3->dev, res->start, size); if (!phy_dwc3->base) { dev_err(phy_dwc3->dev, "failed to map reg\n"); return -ENOMEM; } phy_dwc3->ref_clk = devm_clk_get(phy_dwc3->dev, "ref"); if (IS_ERR(phy_dwc3->ref_clk)) { dev_dbg(phy_dwc3->dev, "cannot get reference clock\n"); return PTR_ERR(phy_dwc3->ref_clk); } clk_set_rate(phy_dwc3->ref_clk, data->clk_rate); phy_dwc3->xo_clk = devm_clk_get(phy_dwc3->dev, "xo"); if (IS_ERR(phy_dwc3->xo_clk)) { dev_dbg(phy_dwc3->dev, "cannot get TCXO clock\n"); phy_dwc3->xo_clk = NULL; } /* Parse device node to probe HSIO settings */ if (device_property_read_u32(&pdev->dev, "qcom,rx-eq", &phy_dwc3->rx_eq)) phy_dwc3->rx_eq = SSPHY_RX_EQ_VALUE; if (device_property_read_u32(&pdev->dev, "qcom,tx-deamp_3_5db", &phy_dwc3->tx_deamp_3_5db)) phy_dwc3->tx_deamp_3_5db = SSPHY_TX_DEEMPH_3_5DB; if (device_property_read_u32(&pdev->dev, "qcom,mpll", &phy_dwc3->mpll)) phy_dwc3->mpll = SSPHY_MPLL_VALUE; generic_phy = devm_phy_create(phy_dwc3->dev, pdev->dev.of_node, &data->ops); if (IS_ERR(generic_phy)) return PTR_ERR(generic_phy); phy_set_drvdata(generic_phy, phy_dwc3); platform_set_drvdata(pdev, phy_dwc3); phy_provider = devm_of_phy_provider_register(phy_dwc3->dev, of_phy_simple_xlate); if (IS_ERR(phy_provider)) return PTR_ERR(phy_provider); return 0; } static struct platform_driver qcom_ipq806x_usb_phy_driver = { .probe = qcom_ipq806x_usb_phy_probe, .driver = { .name = "qcom-ipq806x-usb-phy", .of_match_table = qcom_ipq806x_usb_phy_table, }, }; module_platform_driver(qcom_ipq806x_usb_phy_driver); MODULE_ALIAS("platform:phy-qcom-ipq806x-usb"); MODULE_LICENSE("GPL v2"); MODULE_AUTHOR("Andy Gross <agross@codeaurora.org>"); MODULE_AUTHOR("Ivan T. Ivanov <iivanov@mm-sol.com>"); MODULE_DESCRIPTION("DesignWare USB3 QCOM PHY driver");
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