* [PATCH v3 2/4] phy: qcom-qusb2: New driver for QUSB2 PHY on Qcom chips
2016-12-20 17:03 [PATCH v3 0/4] phy: USB and PCIe phy drivers for Qcom chipsets Vivek Gautam
2016-12-20 17:03 ` [PATCH v3 1/4] dt-bindings: phy: Add support for QUSB2 phy Vivek Gautam
@ 2016-12-20 17:03 ` Vivek Gautam
2016-12-28 23:01 ` Stephen Boyd
2016-12-20 17:03 ` [PATCH v3 3/4] dt-bindings: phy: Add support for QMP phy Vivek Gautam
2016-12-20 17:03 ` [PATCH v3 4/4] phy: qcom-qmp: new qmp phy driver for qcom-chipsets Vivek Gautam
3 siblings, 1 reply; 22+ messages in thread
From: Vivek Gautam @ 2016-12-20 17:03 UTC (permalink / raw)
To: robh+dt, kishon, sboyd, linux-kernel, devicetree
Cc: mark.rutland, srinivas.kandagatla, linux-arm-msm, Vivek Gautam
PHY transceiver driver for QUSB2 phy controller that provides
HighSpeed functionality for DWC3 controller present on
Qualcomm chipsets.
Signed-off-by: Vivek Gautam <vivek.gautam@codeaurora.org>
---
Changes since v2:
- Removed selecting 'RESET_CONTROLLER' config.
- Added error handling for clk_prepare_enable paths.
- Removed explicitly setting ref_clk rate to 19.2 MHz. Don't need to
do that since 'xo' is modeled as parent to this clock.
- Removed 'ref_clk_src' handling. Driver doesn't need to request and
handle this clock.
- Moved nvmem_cell_get() to probe function.
- Simplified phy pll status handling.
- Using of_device_get_match_data() to get match data.
- Uniformly using lowercase for hex numbers.
- Fixed sparse warnings.
- Using shorter variable names in structure and in functions.
- Handling various comment style shortcomings.
Changes since v1:
- removed reference to clk_enabled/pwr_enabled.
- moved clock and regulator enable code to phy_power_on/off() callbacks.
- fixed return on EPROBE_DEFER in qusb2_phy_probe().
- fixed phy create and phy register ordering.
- removed references to non-lkml links from commit message.
- took care of other minor nits.
- Fixed coccinelle warnings -
'PTR_ERR applied after initialization to constant'
- Addressed review comment, regarding qfprom access for tune2 param value.
This driver is now based on qfprom patch[1] that allows byte access now.
drivers/phy/Kconfig | 10 +
drivers/phy/Makefile | 1 +
drivers/phy/phy-qcom-qusb2.c | 540 +++++++++++++++++++++++++++++++++++++++++++
3 files changed, 551 insertions(+)
create mode 100644 drivers/phy/phy-qcom-qusb2.c
diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
index e8eb7f225a88..0ed53d018b23 100644
--- a/drivers/phy/Kconfig
+++ b/drivers/phy/Kconfig
@@ -430,6 +430,16 @@ config PHY_STIH407_USB
Enable this support to enable the picoPHY device used by USB2
and USB3 controllers on STMicroelectronics STiH407 SoC families.
+config PHY_QCOM_QUSB2
+ tristate "Qualcomm QUSB2 PHY Driver"
+ depends on OF && (ARCH_QCOM || COMPILE_TEST)
+ select GENERIC_PHY
+ help
+ Enable this to support the HighSpeed QUSB2 PHY transceiver for USB
+ controllers on Qualcomm chips. This driver supports the high-speed
+ PHY which is usually paired with either the ChipIdea or Synopsys DWC3
+ USB IPs on MSM SOCs.
+
config PHY_QCOM_UFS
tristate "Qualcomm UFS PHY driver"
depends on OF && ARCH_QCOM
diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile
index 65eb2f436a41..dad1682b80e3 100644
--- a/drivers/phy/Makefile
+++ b/drivers/phy/Makefile
@@ -49,6 +49,7 @@ obj-$(CONFIG_PHY_ST_SPEAR1310_MIPHY) += phy-spear1310-miphy.o
obj-$(CONFIG_PHY_ST_SPEAR1340_MIPHY) += phy-spear1340-miphy.o
obj-$(CONFIG_PHY_XGENE) += phy-xgene.o
obj-$(CONFIG_PHY_STIH407_USB) += phy-stih407-usb.o
+obj-$(CONFIG_PHY_QCOM_QUSB2) += phy-qcom-qusb2.o
obj-$(CONFIG_PHY_QCOM_UFS) += phy-qcom-ufs.o
obj-$(CONFIG_PHY_QCOM_UFS) += phy-qcom-ufs-qmp-20nm.o
obj-$(CONFIG_PHY_QCOM_UFS) += phy-qcom-ufs-qmp-14nm.o
diff --git a/drivers/phy/phy-qcom-qusb2.c b/drivers/phy/phy-qcom-qusb2.c
new file mode 100644
index 000000000000..ae7feae835fd
--- /dev/null
+++ b/drivers/phy/phy-qcom-qusb2.c
@@ -0,0 +1,540 @@
+/*
+ * Copyright (c) 2016, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/nvmem-consumer.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/phy/phy.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/reset.h>
+#include <linux/slab.h>
+
+#define QUSB2PHY_PLL_TEST 0x04
+#define CLK_REF_SEL BIT(7)
+
+#define QUSB2PHY_PLL_TUNE 0x08
+#define QUSB2PHY_PLL_USER_CTL1 0x0c
+#define QUSB2PHY_PLL_USER_CTL2 0x10
+#define QUSB2PHY_PLL_AUTOPGM_CTL1 0x1c
+#define QUSB2PHY_PLL_PWR_CTRL 0x18
+
+#define QUSB2PHY_PLL_STATUS 0x38
+#define PLL_LOCKED BIT(5)
+
+#define QUSB2PHY_PORT_TUNE1 0x80
+#define QUSB2PHY_PORT_TUNE2 0x84
+#define QUSB2PHY_PORT_TUNE3 0x88
+#define QUSB2PHY_PORT_TUNE4 0x8c
+#define QUSB2PHY_PORT_TUNE5 0x90
+#define QUSB2PHY_PORT_TEST2 0x9c
+
+#define QUSB2PHY_PORT_POWERDOWN 0xb4
+#define CLAMP_N_EN BIT(5)
+#define FREEZIO_N BIT(1)
+#define POWER_DOWN BIT(0)
+
+#define QUSB2PHY_REFCLK_ENABLE BIT(0)
+
+#define PHY_CLK_SCHEME_SEL BIT(0)
+
+struct qusb2_phy_init_tbl {
+ unsigned int offset;
+ unsigned int val;
+};
+#define QUSB2_PHY_INIT_CFG(o, v) \
+ { \
+ .offset = o, \
+ .val = v, \
+ }
+
+static const struct qusb2_phy_init_tbl msm8996_init_tbl[] = {
+ QUSB2_PHY_INIT_CFG(QUSB2PHY_PORT_TUNE1, 0xf8),
+ QUSB2_PHY_INIT_CFG(QUSB2PHY_PORT_TUNE2, 0xb3),
+ QUSB2_PHY_INIT_CFG(QUSB2PHY_PORT_TUNE3, 0x83),
+ QUSB2_PHY_INIT_CFG(QUSB2PHY_PORT_TUNE4, 0xc0),
+ QUSB2_PHY_INIT_CFG(QUSB2PHY_PLL_TUNE, 0x30),
+ QUSB2_PHY_INIT_CFG(QUSB2PHY_PLL_USER_CTL1, 0x79),
+ QUSB2_PHY_INIT_CFG(QUSB2PHY_PLL_USER_CTL2, 0x21),
+ QUSB2_PHY_INIT_CFG(QUSB2PHY_PORT_TEST2, 0x14),
+ QUSB2_PHY_INIT_CFG(QUSB2PHY_PLL_AUTOPGM_CTL1, 0x9f),
+ QUSB2_PHY_INIT_CFG(QUSB2PHY_PLL_PWR_CTRL, 0x00),
+};
+
+struct qusb2_phy_cfg {
+ const struct qusb2_phy_init_tbl *tbl;
+ /* number of entries in the table */
+ unsigned int tbl_num;
+ /* offset to PHY_CLK_SCHEME register in TCSR map */
+ unsigned int clk_scheme_offset;
+};
+
+static const struct qusb2_phy_cfg msm8996_phy_cfg = {
+ .tbl = msm8996_init_tbl,
+ .tbl_num = ARRAY_SIZE(msm8996_init_tbl),
+};
+
+/**
+ * struct qusb2_phy - structure holding qusb2 phy attributes
+ *
+ * @phy: generic phy
+ * @base: iomapped memory space for qubs2 phy
+ *
+ * @cfg_ahb_clk: AHB2PHY interface clock
+ * @ref_clk: phy reference clock
+ * @iface_clk: phy interface clock
+ *
+ * @phy_reset: phy reset control
+ *
+ * @vdda_phy: vdd supply to the phy core block
+ * @vdda_pll: 1.8V vdd supply to ref_clk block
+ * @vdda_phy_dpdm: 3.1V vdd supply to Dp/Dm port signals
+ * @tcsr: TCSR syscon register map
+ * @cell: nvmem cell containing phy tuning value
+ *
+ * @cfg: phy config data
+ * @has_se_clk_scheme: indicate if PHY has single-ended ref clock scheme
+ */
+struct qusb2_phy {
+ struct phy *phy;
+ void __iomem *base;
+
+ struct clk *cfg_ahb_clk;
+ struct clk *ref_clk;
+ struct clk *iface_clk;
+
+ struct reset_control *phy_reset;
+
+ struct regulator *vdd_phy;
+ struct regulator *vdda_pll;
+ struct regulator *vdda_phy_dpdm;
+
+ struct regmap *tcsr;
+ struct nvmem_cell *cell;
+
+ const struct qusb2_phy_cfg *cfg;
+ bool has_se_clk_scheme;
+};
+
+static inline void qusb2_setbits(void __iomem *reg, u32 val)
+{
+ u32 reg_val;
+
+ reg_val = readl_relaxed(reg);
+ reg_val |= val;
+ writel_relaxed(reg_val, reg);
+
+ /* Ensure above write is completed */
+ mb();
+}
+
+static inline void qusb2_clrbits(void __iomem *reg, u32 val)
+{
+ u32 reg_val;
+
+ reg_val = readl_relaxed(reg);
+ reg_val &= ~val;
+ writel_relaxed(reg_val, reg);
+
+ /* Ensure above write is completed */
+ mb();
+}
+
+static inline void qcom_qusb2_phy_configure(void __iomem *base,
+ const struct qusb2_phy_init_tbl tbl[],
+ int num)
+{
+ int i;
+
+ for (i = 0; i < num; i++)
+ writel_relaxed(tbl[i].val, base + tbl[i].offset);
+
+ /* flush buffered writes */
+ mb();
+}
+
+static int qusb2_phy_toggle_power(struct qusb2_phy *qphy, bool on)
+{
+ struct device *dev = &qphy->phy->dev;
+ int ret;
+
+ if (!on) {
+ ret = 0;
+ goto disable_vdda_phy_dpdm;
+ }
+
+ ret = regulator_enable(qphy->vdd_phy);
+ if (ret) {
+ dev_err(dev, "failed to enable vdd-phy, %d\n", ret);
+ goto err_vdd_phy;
+ }
+
+ ret = regulator_enable(qphy->vdda_pll);
+ if (ret) {
+ dev_err(dev, "failed to enable vdda-pll, %d\n", ret);
+ goto disable_vdd_phy;
+ }
+
+ ret = regulator_enable(qphy->vdda_phy_dpdm);
+ if (ret) {
+ dev_err(dev, "failed to enable vdda-phy-dpdm, %d\n", ret);
+ goto disable_vdda_pll;
+ }
+
+ dev_vdbg(dev, "%s(): regulators are turned on\n", __func__);
+
+ return ret;
+
+disable_vdda_phy_dpdm:
+ regulator_disable(qphy->vdda_phy_dpdm);
+disable_vdda_pll:
+ regulator_disable(qphy->vdda_pll);
+disable_vdd_phy:
+ regulator_disable(qphy->vdd_phy);
+err_vdd_phy:
+ dev_vdbg(dev, "%s(): regulators are turned off\n", __func__);
+ return ret;
+}
+
+/*
+ * Fetches HS Tx tuning value from nvmem and sets the
+ * QUSB2PHY_PORT_TUNE2 register.
+ * For error case, skip setting the value and use the default value.
+ */
+static void qusb2_phy_set_tune2_param(struct qusb2_phy *qphy)
+{
+ struct device *dev = &qphy->phy->dev;
+ u8 *val;
+
+ /*
+ * Read efuse register having TUNE2 parameter's high nibble.
+ * If efuse register shows value as 0x0, or if we fail to find
+ * a valid efuse register settings, then use default value
+ * as 0xB for high nibble that we have already set while
+ * configuring phy.
+ */
+ val = nvmem_cell_read(qphy->cell, NULL);
+ if (IS_ERR(val) || !val[0]) {
+ dev_dbg(dev, "failed to read a valid hs-tx trim value, %ld\n",
+ PTR_ERR(val));
+ return;
+ }
+
+ /* Fused TUNE2 value is the higher nibble only */
+ qusb2_setbits(qphy->base + QUSB2PHY_PORT_TUNE2, val[0] << 0x4);
+}
+
+static int qusb2_phy_poweron(struct phy *phy)
+{
+ struct qusb2_phy *qphy = phy_get_drvdata(phy);
+ int ret;
+
+ dev_vdbg(&phy->dev, "%s(): Powering-on QUSB2 phy\n", __func__);
+
+ /* turn on regulator supplies */
+ ret = qusb2_phy_toggle_power(qphy, true);
+ if (ret)
+ return ret;
+
+ ret = clk_prepare_enable(qphy->iface_clk);
+ if (ret)
+ dev_err(&phy->dev, "failed to enable iface_clk, %d\n", ret);
+
+ return ret;
+}
+
+static int qusb2_phy_poweroff(struct phy *phy)
+{
+ struct qusb2_phy *qphy = phy_get_drvdata(phy);
+
+ clk_disable_unprepare(qphy->iface_clk);
+
+ qusb2_phy_toggle_power(qphy, false);
+
+ return 0;
+}
+
+static int qusb2_phy_init(struct phy *phy)
+{
+ struct qusb2_phy *qphy = phy_get_drvdata(phy);
+ unsigned int val;
+ unsigned int clk_scheme;
+ int ret;
+
+ dev_vdbg(&phy->dev, "%s(): Initializing QUSB2 phy\n", __func__);
+
+ /* enable ahb interface clock to program phy */
+ ret = clk_prepare_enable(qphy->cfg_ahb_clk);
+ if (ret) {
+ dev_err(&phy->dev, "failed to enable cfg ahb clock, %d\n", ret);
+ return ret;
+ }
+
+ /* Perform phy reset */
+ ret = reset_control_assert(qphy->phy_reset);
+ if (ret) {
+ dev_err(&phy->dev, "failed to assert phy_reset, %d\n", ret);
+ goto err;
+ }
+
+ /* 100 us delay to keep PHY in reset mode */
+ usleep_range(100, 150);
+
+ ret = reset_control_deassert(qphy->phy_reset);
+ if (ret) {
+ dev_err(&phy->dev, "failed to de-assert phy_reset, %d\n", ret);
+ goto err;
+ }
+
+ /* Disable the PHY */
+ qusb2_setbits(qphy->base + QUSB2PHY_PORT_POWERDOWN,
+ CLAMP_N_EN | FREEZIO_N | POWER_DOWN);
+
+ /* save reset value to override reference clock scheme later */
+ val = readl_relaxed(qphy->base + QUSB2PHY_PLL_TEST);
+
+ qcom_qusb2_phy_configure(qphy->base, qphy->cfg->tbl,
+ qphy->cfg->tbl_num);
+
+ /* Set efuse value for tuning the PHY */
+ qusb2_phy_set_tune2_param(qphy);
+
+ /* Enable the PHY */
+ qusb2_clrbits(qphy->base + QUSB2PHY_PORT_POWERDOWN, POWER_DOWN);
+
+ /* Required to get phy pll lock successfully */
+ usleep_range(150, 160);
+
+ /* Default is single-ended clock on msm8996 */
+ qphy->has_se_clk_scheme = true;
+ /*
+ * read TCSR_PHY_CLK_SCHEME register to check if single-ended
+ * clock scheme is selected. If yes, then disable differential
+ * ref_clk and use single-ended clock, otherwise use differential
+ * ref_clk only.
+ */
+ if (qphy->tcsr) {
+ ret = regmap_read(qphy->tcsr, qphy->cfg->clk_scheme_offset,
+ &clk_scheme);
+ if (ret) {
+ dev_err(&phy->dev, "failed to read clk scheme reg\n");
+ goto err1;
+ }
+
+ /* is it a differential clock scheme ? */
+ if (!(clk_scheme & PHY_CLK_SCHEME_SEL)) {
+ dev_vdbg(&phy->dev, "%s(): select differential clk\n",
+ __func__);
+ qphy->has_se_clk_scheme = false;
+ } else {
+ dev_vdbg(&phy->dev, "%s(): select single-ended clk\n",
+ __func__);
+ }
+ }
+
+ if (!qphy->has_se_clk_scheme) {
+ val &= ~CLK_REF_SEL;
+ ret = clk_prepare_enable(qphy->ref_clk);
+ if (ret) {
+ dev_err(&phy->dev, "failed to enable ref clk, %d\n",
+ ret);
+ goto err1;
+ }
+ } else {
+ val |= CLK_REF_SEL;
+ }
+
+ writel_relaxed(val, qphy->base + QUSB2PHY_PLL_TEST);
+
+ /* Make sure that above write is completed to get PLL source clock */
+ wmb();
+
+ /* Required to get phy pll lock successfully */
+ usleep_range(100, 110);
+
+ val = readb_relaxed(qphy->base + QUSB2PHY_PLL_STATUS);
+ if (!(val & PLL_LOCKED)) {
+ dev_err(&phy->dev,
+ "QUSB2PHY pll lock failed: status reg = %x\n", val);
+ ret = -EBUSY;
+ goto err2;
+ }
+
+ return 0;
+
+err2:
+ if (!qphy->has_se_clk_scheme)
+ clk_disable_unprepare(qphy->ref_clk);
+err1:
+ reset_control_assert(qphy->phy_reset);
+err:
+ clk_disable_unprepare(qphy->cfg_ahb_clk);
+ return ret;
+}
+
+static int qusb2_phy_exit(struct phy *phy)
+{
+ struct qusb2_phy *qphy = phy_get_drvdata(phy);
+
+ /* Disable the PHY */
+ qusb2_setbits(qphy->base + QUSB2PHY_PORT_POWERDOWN,
+ CLAMP_N_EN | FREEZIO_N | POWER_DOWN);
+
+ if (!qphy->has_se_clk_scheme)
+ clk_disable_unprepare(qphy->ref_clk);
+
+ reset_control_assert(qphy->phy_reset);
+
+ clk_disable_unprepare(qphy->cfg_ahb_clk);
+
+ return 0;
+}
+
+static const struct phy_ops qusb2_phy_gen_ops = {
+ .init = qusb2_phy_init,
+ .exit = qusb2_phy_exit,
+ .power_on = qusb2_phy_poweron,
+ .power_off = qusb2_phy_poweroff,
+ .owner = THIS_MODULE,
+};
+
+static const struct of_device_id qusb2_phy_of_match_table[] = {
+ {
+ .compatible = "qcom,msm8996-qusb2-phy",
+ .data = &msm8996_phy_cfg,
+ },
+ { },
+};
+MODULE_DEVICE_TABLE(of, qusb2_phy_of_match_table);
+
+static int qusb2_phy_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct qusb2_phy *qphy;
+ struct phy_provider *phy_provider;
+ struct phy *generic_phy;
+ struct resource *res;
+ int ret;
+
+ qphy = devm_kzalloc(dev, sizeof(*qphy), GFP_KERNEL);
+ if (!qphy)
+ return -ENOMEM;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ qphy->base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(qphy->base))
+ return PTR_ERR(qphy->base);
+
+ qphy->cfg_ahb_clk = devm_clk_get(dev, "cfg_ahb");
+ if (IS_ERR(qphy->cfg_ahb_clk)) {
+ ret = PTR_ERR(qphy->cfg_ahb_clk);
+ if (ret != -EPROBE_DEFER)
+ dev_err(dev, "failed to get cfg ahb clk, %d\n", ret);
+ return ret;
+ }
+
+ qphy->ref_clk = devm_clk_get(dev, "ref");
+ if (IS_ERR(qphy->ref_clk)) {
+ ret = PTR_ERR(qphy->ref_clk);
+ if (ret != -EPROBE_DEFER)
+ dev_err(dev, "failed to get ref clk, %d\n", ret);
+ return ret;
+ }
+
+ qphy->iface_clk = devm_clk_get(dev, "iface");
+ if (IS_ERR(qphy->iface_clk)) {
+ ret = PTR_ERR(qphy->iface_clk);
+ if (ret == -EPROBE_DEFER)
+ return ret;
+ qphy->iface_clk = NULL;
+ dev_dbg(dev, "failed to get iface clk, %d\n", ret);
+ }
+
+ qphy->phy_reset = devm_reset_control_get(&pdev->dev, "phy");
+ if (IS_ERR(qphy->phy_reset)) {
+ dev_err(dev, "failed to get phy core reset\n");
+ return PTR_ERR(qphy->phy_reset);
+ }
+
+ qphy->vdd_phy = devm_regulator_get(dev, "vdd-phy");
+ if (IS_ERR(qphy->vdd_phy))
+ return PTR_ERR(qphy->vdd_phy);
+
+ qphy->vdda_pll = devm_regulator_get(dev, "vdda-pll");
+ if (IS_ERR(qphy->vdda_pll))
+ return PTR_ERR(qphy->vdda_pll);
+
+ qphy->vdda_phy_dpdm = devm_regulator_get(dev, "vdda-phy-dpdm");
+ if (IS_ERR(qphy->vdda_phy_dpdm))
+ return PTR_ERR(qphy->vdda_phy_dpdm);
+
+ /* Get the specific init parameters of QMP phy */
+ qphy->cfg = of_device_get_match_data(dev);
+
+ qphy->tcsr = syscon_regmap_lookup_by_phandle(dev->of_node,
+ "qcom,tcsr-syscon");
+ if (IS_ERR(qphy->tcsr)) {
+ dev_dbg(dev, "failed to lookup TCSR regmap\n");
+ qphy->tcsr = NULL;
+ }
+
+ qphy->cell = devm_nvmem_cell_get(dev, "tune2_hstx_trim");
+ if (IS_ERR(qphy->cell)) {
+ if (PTR_ERR(qphy->cell) == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+ qphy->cell = NULL;
+ dev_dbg(dev, "failed to lookup tune2 hstx trim value\n");
+ }
+
+ generic_phy = devm_phy_create(dev, NULL, &qusb2_phy_gen_ops);
+ if (IS_ERR(generic_phy)) {
+ ret = PTR_ERR(generic_phy);
+ dev_err(dev, "failed to create phy, %d\n", ret);
+ return ret;
+ }
+ qphy->phy = generic_phy;
+
+ dev_set_drvdata(dev, qphy);
+ phy_set_drvdata(generic_phy, qphy);
+
+ phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
+ if (IS_ERR(phy_provider)) {
+ ret = PTR_ERR(phy_provider);
+ dev_err(dev, "failed to register phy, %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static struct platform_driver qusb2_phy_driver = {
+ .probe = qusb2_phy_probe,
+ .driver = {
+ .name = "qcom-qusb2-phy",
+ .of_match_table = of_match_ptr(qusb2_phy_of_match_table),
+ },
+};
+
+module_platform_driver(qusb2_phy_driver);
+
+MODULE_AUTHOR("Vivek Gautam <vivek.gautam@codeaurora.org>");
+MODULE_DESCRIPTION("Qualcomm QUSB2 PHY driver");
+MODULE_LICENSE("GPL v2");
--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project
^ permalink raw reply related [flat|nested] 22+ messages in thread* [PATCH v3 4/4] phy: qcom-qmp: new qmp phy driver for qcom-chipsets
2016-12-20 17:03 [PATCH v3 0/4] phy: USB and PCIe phy drivers for Qcom chipsets Vivek Gautam
` (2 preceding siblings ...)
2016-12-20 17:03 ` [PATCH v3 3/4] dt-bindings: phy: Add support for QMP phy Vivek Gautam
@ 2016-12-20 17:03 ` Vivek Gautam
2016-12-28 23:16 ` Stephen Boyd
2017-01-06 7:18 ` Bjorn Andersson
3 siblings, 2 replies; 22+ messages in thread
From: Vivek Gautam @ 2016-12-20 17:03 UTC (permalink / raw)
To: robh+dt, kishon, sboyd, linux-kernel, devicetree
Cc: mark.rutland, srinivas.kandagatla, linux-arm-msm, Vivek Gautam
Qualcomm SOCs have QMP phy controller that provides support
to a number of controller, viz. PCIe, UFS, and USB.
Add a new driver, based on generic phy framework, for this
phy controller.
Signed-off-by: Vivek Gautam <vivek.gautam@codeaurora.org>
Tested-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
---
Changes since v2:
- Removed selecting 'RESET_CONTROLLER' config.
- Added error handling for clk_prepare_enable paths.
- Removed 'ref_clk_src' handling. Driver doesn't need to request and
handle this clock.
- Using readl_poll_timeout() to simplify pcs ready status polling.
Also fixed the polling condition for pcs block ready status:
'Common block ready status bit is set on phy init completion, while
PCS block ready status bit (PHYSTATUS) is reset on phy init
completion.'
- Moved out the per-lane phy creation from probe() to separate
function.
- Registering pipe clock source as a fixed rate clock that comes
out of the PLL block of QMP phy. These source clocks serve as
parent to 'pipe_clks' that are requested by pcie or usb3 phys.
- Using of_device_get_match_data() to get match data.
- Fixed sparse warnings for 'static' and 'const'.
- Using shorter variable names in structure and in functions.
- Handling various comment style shortcomings.
Changes since v1:
- Fixed missing mutex_unlock() calls in error cases, reported by
Julia Lawall.
- Selecting CONFIG_RESET_CONTROLLER when this driver is enabled.
- Added a boolean property to check if the phy has individual lane
reset available.
- Took care or EPROBE_DEFER, dev_vdbg() and other minor nits.
- Removed references to non-lkml links from commit message.
- Moved to use separate iomem resources for each lanes.
Tx, Rx and PCS offsets per lane can now come from dt bindings.
drivers/phy/Kconfig | 8 +
drivers/phy/Makefile | 1 +
drivers/phy/phy-qcom-qmp.c | 1191 ++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 1200 insertions(+)
create mode 100644 drivers/phy/phy-qcom-qmp.c
diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
index 0ed53d018b23..54296397452c 100644
--- a/drivers/phy/Kconfig
+++ b/drivers/phy/Kconfig
@@ -430,6 +430,14 @@ config PHY_STIH407_USB
Enable this support to enable the picoPHY device used by USB2
and USB3 controllers on STMicroelectronics STiH407 SoC families.
+config PHY_QCOM_QMP
+ tristate "Qualcomm QMP PHY Driver"
+ depends on OF && (ARCH_QCOM || COMPILE_TEST)
+ select GENERIC_PHY
+ help
+ Enable this to support the QMP PHY transceiver that is used
+ with controllers such as PCIe, UFS, and USB on Qualcomm chips.
+
config PHY_QCOM_QUSB2
tristate "Qualcomm QUSB2 PHY Driver"
depends on OF && (ARCH_QCOM || COMPILE_TEST)
diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile
index dad1682b80e3..dbe7731bbca9 100644
--- a/drivers/phy/Makefile
+++ b/drivers/phy/Makefile
@@ -50,6 +50,7 @@ obj-$(CONFIG_PHY_ST_SPEAR1340_MIPHY) += phy-spear1340-miphy.o
obj-$(CONFIG_PHY_XGENE) += phy-xgene.o
obj-$(CONFIG_PHY_STIH407_USB) += phy-stih407-usb.o
obj-$(CONFIG_PHY_QCOM_QUSB2) += phy-qcom-qusb2.o
+obj-$(CONFIG_PHY_QCOM_QMP) += phy-qcom-qmp.o
obj-$(CONFIG_PHY_QCOM_UFS) += phy-qcom-ufs.o
obj-$(CONFIG_PHY_QCOM_UFS) += phy-qcom-ufs-qmp-20nm.o
obj-$(CONFIG_PHY_QCOM_UFS) += phy-qcom-ufs-qmp-14nm.o
diff --git a/drivers/phy/phy-qcom-qmp.c b/drivers/phy/phy-qcom-qmp.c
new file mode 100644
index 000000000000..09ab93575057
--- /dev/null
+++ b/drivers/phy/phy-qcom-qmp.c
@@ -0,0 +1,1191 @@
+/*
+ * Copyright (c) 2016, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/iopoll.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/phy/phy.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/consumer.h>
+#include <linux/reset.h>
+#include <linux/slab.h>
+
+#include <dt-bindings/phy/phy.h>
+
+/* QMP PHY QSERDES COM registers */
+#define QSERDES_COM_BG_TIMER 0x00c
+#define QSERDES_COM_SSC_EN_CENTER 0x010
+#define QSERDES_COM_SSC_ADJ_PER1 0x014
+#define QSERDES_COM_SSC_ADJ_PER2 0x018
+#define QSERDES_COM_SSC_PER1 0x01c
+#define QSERDES_COM_SSC_PER2 0x020
+#define QSERDES_COM_SSC_STEP_SIZE1 0x024
+#define QSERDES_COM_SSC_STEP_SIZE2 0x028
+#define QSERDES_COM_BIAS_EN_CLKBUFLR_EN 0x034
+#define QSERDES_COM_CLK_ENABLE1 0x038
+#define QSERDES_COM_SYS_CLK_CTRL 0x03c
+#define QSERDES_COM_SYSCLK_BUF_ENABLE 0x040
+#define QSERDES_COM_PLL_IVCO 0x048
+#define QSERDES_COM_LOCK_CMP1_MODE0 0x04c
+#define QSERDES_COM_LOCK_CMP2_MODE0 0x050
+#define QSERDES_COM_LOCK_CMP3_MODE0 0x054
+#define QSERDES_COM_LOCK_CMP1_MODE1 0x058
+#define QSERDES_COM_LOCK_CMP2_MODE1 0x05c
+#define QSERDES_COM_LOCK_CMP3_MODE1 0x060
+#define QSERDES_COM_BG_TRIM 0x070
+#define QSERDES_COM_CLK_EP_DIV 0x074
+#define QSERDES_COM_CP_CTRL_MODE0 0x078
+#define QSERDES_COM_CP_CTRL_MODE1 0x07c
+#define QSERDES_COM_PLL_RCTRL_MODE0 0x084
+#define QSERDES_COM_PLL_RCTRL_MODE1 0x088
+#define QSERDES_COM_PLL_CCTRL_MODE0 0x090
+#define QSERDES_COM_PLL_CCTRL_MODE1 0x094
+#define QSERDES_COM_SYSCLK_EN_SEL 0x0ac
+#define QSERDES_COM_RESETSM_CNTRL 0x0b4
+#define QSERDES_COM_RESTRIM_CTRL 0x0bc
+#define QSERDES_COM_RESCODE_DIV_NUM 0x0c4
+#define QSERDES_COM_LOCK_CMP_EN 0x0c8
+#define QSERDES_COM_LOCK_CMP_CFG 0x0cc
+#define QSERDES_COM_DEC_START_MODE0 0x0d0
+#define QSERDES_COM_DEC_START_MODE1 0x0d4
+#define QSERDES_COM_DIV_FRAC_START1_MODE0 0x0dc
+#define QSERDES_COM_DIV_FRAC_START2_MODE0 0x0e0
+#define QSERDES_COM_DIV_FRAC_START3_MODE0 0x0e4
+#define QSERDES_COM_DIV_FRAC_START1_MODE1 0x0e8
+#define QSERDES_COM_DIV_FRAC_START2_MODE1 0x0ec
+#define QSERDES_COM_DIV_FRAC_START3_MODE1 0x0f0
+#define QSERDES_COM_INTEGLOOP_GAIN0_MODE0 0x108
+#define QSERDES_COM_INTEGLOOP_GAIN1_MODE0 0x10c
+#define QSERDES_COM_INTEGLOOP_GAIN0_MODE1 0x110
+#define QSERDES_COM_INTEGLOOP_GAIN1_MODE1 0x114
+#define QSERDES_COM_VCO_TUNE_CTRL 0x124
+#define QSERDES_COM_VCO_TUNE_MAP 0x128
+#define QSERDES_COM_VCO_TUNE1_MODE0 0x12c
+#define QSERDES_COM_VCO_TUNE2_MODE0 0x130
+#define QSERDES_COM_VCO_TUNE1_MODE1 0x134
+#define QSERDES_COM_VCO_TUNE2_MODE1 0x138
+#define QSERDES_COM_VCO_TUNE_TIMER1 0x144
+#define QSERDES_COM_VCO_TUNE_TIMER2 0x148
+#define QSERDES_COM_BG_CTRL 0x170
+#define QSERDES_COM_CLK_SELECT 0x174
+#define QSERDES_COM_HSCLK_SEL 0x178
+#define QSERDES_COM_CORECLK_DIV 0x184
+#define QSERDES_COM_CORE_CLK_EN 0x18c
+#define QSERDES_COM_C_READY_STATUS 0x190
+#define QSERDES_COM_CMN_CONFIG 0x194
+#define QSERDES_COM_SVS_MODE_CLK_SEL 0x19c
+#define QSERDES_COM_DEBUG_BUS0 0x1a0
+#define QSERDES_COM_DEBUG_BUS1 0x1a4
+#define QSERDES_COM_DEBUG_BUS2 0x1a8
+#define QSERDES_COM_DEBUG_BUS3 0x1ac
+#define QSERDES_COM_DEBUG_BUS_SEL 0x1b0
+#define QSERDES_COM_CORECLK_DIV_MODE1 0x1bc
+
+/* QMP PHY TX registers */
+#define QSERDES_TX_RES_CODE_LANE_OFFSET 0x054
+#define QSERDES_TX_DEBUG_BUS_SEL 0x064
+#define QSERDES_TX_HIGHZ_TRANSCEIVEREN_BIAS_DRVR_EN 0x068
+#define QSERDES_TX_LANE_MODE 0x094
+#define QSERDES_TX_RCV_DETECT_LVL_2 0x0ac
+
+/* QMP PHY RX registers */
+#define QSERDES_RX_UCDR_SO_GAIN_HALF 0x010
+#define QSERDES_RX_UCDR_SO_GAIN 0x01c
+#define QSERDES_RX_UCDR_FASTLOCK_FO_GAIN 0x040
+#define QSERDES_RX_UCDR_SO_SATURATION_AND_ENABLE 0x048
+#define QSERDES_RX_RX_TERM_BW 0x090
+#define QSERDES_RX_RX_EQ_GAIN1_LSB 0x0c4
+#define QSERDES_RX_RX_EQ_GAIN1_MSB 0x0c8
+#define QSERDES_RX_RX_EQ_GAIN2_LSB 0x0cc
+#define QSERDES_RX_RX_EQ_GAIN2_MSB 0x0d0
+#define QSERDES_RX_RX_EQU_ADAPTOR_CNTRL2 0x0d8
+#define QSERDES_RX_RX_EQU_ADAPTOR_CNTRL3 0x0dc
+#define QSERDES_RX_RX_EQU_ADAPTOR_CNTRL4 0x0e0
+#define QSERDES_RX_RX_EQ_OFFSET_ADAPTOR_CNTRL1 0x108
+#define QSERDES_RX_RX_OFFSET_ADAPTOR_CNTRL2 0x10c
+#define QSERDES_RX_SIGDET_ENABLES 0x110
+#define QSERDES_RX_SIGDET_CNTRL 0x114
+#define QSERDES_RX_SIGDET_LVL 0x118
+#define QSERDES_RX_SIGDET_DEGLITCH_CNTRL 0x11c
+#define QSERDES_RX_RX_BAND 0x120
+#define QSERDES_RX_RX_INTERFACE_MODE 0x12c
+
+/* QMP PHY PCS registers */
+#define QPHY_SW_RESET 0x00
+#define QPHY_POWER_DOWN_CONTROL 0x04
+#define QPHY_START_CTRL 0x08
+#define QPHY_TXDEEMPH_M6DB_V0 0x24
+#define QPHY_TXDEEMPH_M3P5DB_V0 0x28
+#define QPHY_ENDPOINT_REFCLK_DRIVE 0x54
+#define QPHY_RX_IDLE_DTCT_CNTRL 0x58
+#define QPHY_POWER_STATE_CONFIG1 0x60
+#define QPHY_POWER_STATE_CONFIG2 0x64
+#define QPHY_POWER_STATE_CONFIG4 0x6c
+#define QPHY_LOCK_DETECT_CONFIG1 0x80
+#define QPHY_LOCK_DETECT_CONFIG2 0x84
+#define QPHY_LOCK_DETECT_CONFIG3 0x88
+#define QPHY_PWRUP_RESET_DLY_TIME_AUXCLK 0xa0
+#define QPHY_LP_WAKEUP_DLY_TIME_AUXCLK 0xa4
+
+/* QPHY_SW_RESET bit */
+#define SW_RESET BIT(0)
+/* QPHY_POWER_DOWN_CONTROL */
+#define SW_PWRDN BIT(0)
+#define REFCLK_DRV_DSBL BIT(1)
+/* QPHY_START_CONTROL bits */
+#define SERDES_START BIT(0)
+#define PCS_START BIT(1)
+#define PLL_READY_GATE_EN BIT(3)
+/* QPHY_PCS_STATUS bit */
+#define PHYSTATUS BIT(6)
+/* QPHY_COM_PCS_READY_STATUS bit */
+#define PCS_READY BIT(0)
+
+#define PHY_INIT_COMPLETE_TIMEOUT 1000
+#define POWER_DOWN_DELAY_US_MIN 10
+#define POWER_DOWN_DELAY_US_MAX 11
+
+#define MAX_PROP_NAME 32
+
+struct qmp_phy_init_tbl {
+ unsigned int offset;
+ unsigned int val;
+ /*
+ * register part of layout ?
+ * if yes, then offset gives index in the reg-layout
+ */
+ int in_layout;
+};
+#define QMP_PHY_INIT_CFG(o, v) \
+ { \
+ .offset = o, \
+ .val = v, \
+ }
+#define QMP_PHY_INIT_CFG_L(o, v) \
+ { \
+ .offset = o, \
+ .val = v, \
+ .in_layout = 1, \
+ }
+
+/* set of registers with offsets different per-PHY */
+enum qphy_reg_layout {
+ /* Common block control registers */
+ QPHY_COM_SW_RESET,
+ QPHY_COM_POWER_DOWN_CONTROL,
+ QPHY_COM_START_CONTROL,
+ QPHY_COM_PCS_READY_STATUS,
+ /* PCS registers */
+ QPHY_PLL_LOCK_CHK_DLY_TIME,
+ QPHY_FLL_CNTRL1,
+ QPHY_FLL_CNTRL2,
+ QPHY_FLL_CNT_VAL_L,
+ QPHY_FLL_CNT_VAL_H_TOL,
+ QPHY_FLL_MAN_CODE,
+ QPHY_PCS_READY_STATUS,
+};
+
+static const unsigned int pciephy_regs_layout[] = {
+ [QPHY_COM_SW_RESET] = 0x400,
+ [QPHY_COM_POWER_DOWN_CONTROL] = 0x404,
+ [QPHY_COM_START_CONTROL] = 0x408,
+ [QPHY_COM_PCS_READY_STATUS] = 0x448,
+ [QPHY_PLL_LOCK_CHK_DLY_TIME] = 0xa8,
+ [QPHY_FLL_CNTRL1] = 0xc4,
+ [QPHY_FLL_CNTRL2] = 0xc8,
+ [QPHY_FLL_CNT_VAL_L] = 0xcc,
+ [QPHY_FLL_CNT_VAL_H_TOL] = 0xd0,
+ [QPHY_FLL_MAN_CODE] = 0xd4,
+ [QPHY_PCS_READY_STATUS] = 0x174,
+};
+
+static const unsigned int usb3phy_regs_layout[] = {
+ [QPHY_FLL_CNTRL1] = 0xc0,
+ [QPHY_FLL_CNTRL2] = 0xc4,
+ [QPHY_FLL_CNT_VAL_L] = 0xc8,
+ [QPHY_FLL_CNT_VAL_H_TOL] = 0xcc,
+ [QPHY_FLL_MAN_CODE] = 0xd0,
+ [QPHY_PCS_READY_STATUS] = 0x17c,
+};
+
+static const struct qmp_phy_init_tbl pciephy_serdes_tbl[] = {
+ QMP_PHY_INIT_CFG(QSERDES_COM_BIAS_EN_CLKBUFLR_EN, 0x1c),
+ QMP_PHY_INIT_CFG(QSERDES_COM_CLK_ENABLE1, 0x10),
+ QMP_PHY_INIT_CFG(QSERDES_COM_CLK_SELECT, 0x33),
+ QMP_PHY_INIT_CFG(QSERDES_COM_CMN_CONFIG, 0x06),
+ QMP_PHY_INIT_CFG(QSERDES_COM_LOCK_CMP_EN, 0x42),
+ QMP_PHY_INIT_CFG(QSERDES_COM_VCO_TUNE_MAP, 0x00),
+ QMP_PHY_INIT_CFG(QSERDES_COM_VCO_TUNE_TIMER1, 0xff),
+ QMP_PHY_INIT_CFG(QSERDES_COM_VCO_TUNE_TIMER2, 0x1f),
+ QMP_PHY_INIT_CFG(QSERDES_COM_HSCLK_SEL, 0x01),
+ QMP_PHY_INIT_CFG(QSERDES_COM_SVS_MODE_CLK_SEL, 0x01),
+ QMP_PHY_INIT_CFG(QSERDES_COM_CORE_CLK_EN, 0x00),
+ QMP_PHY_INIT_CFG(QSERDES_COM_CORECLK_DIV, 0x0a),
+ QMP_PHY_INIT_CFG(QSERDES_COM_BG_TIMER, 0x09),
+ QMP_PHY_INIT_CFG(QSERDES_COM_DEC_START_MODE0, 0x82),
+ QMP_PHY_INIT_CFG(QSERDES_COM_DIV_FRAC_START3_MODE0, 0x03),
+ QMP_PHY_INIT_CFG(QSERDES_COM_DIV_FRAC_START2_MODE0, 0x55),
+ QMP_PHY_INIT_CFG(QSERDES_COM_DIV_FRAC_START1_MODE0, 0x55),
+ QMP_PHY_INIT_CFG(QSERDES_COM_LOCK_CMP3_MODE0, 0x00),
+ QMP_PHY_INIT_CFG(QSERDES_COM_LOCK_CMP2_MODE0, 0x1a),
+ QMP_PHY_INIT_CFG(QSERDES_COM_LOCK_CMP1_MODE0, 0x0a),
+ QMP_PHY_INIT_CFG(QSERDES_COM_CLK_SELECT, 0x33),
+ QMP_PHY_INIT_CFG(QSERDES_COM_SYS_CLK_CTRL, 0x02),
+ QMP_PHY_INIT_CFG(QSERDES_COM_SYSCLK_BUF_ENABLE, 0x1f),
+ QMP_PHY_INIT_CFG(QSERDES_COM_SYSCLK_EN_SEL, 0x04),
+ QMP_PHY_INIT_CFG(QSERDES_COM_CP_CTRL_MODE0, 0x0b),
+ QMP_PHY_INIT_CFG(QSERDES_COM_PLL_RCTRL_MODE0, 0x16),
+ QMP_PHY_INIT_CFG(QSERDES_COM_PLL_CCTRL_MODE0, 0x28),
+ QMP_PHY_INIT_CFG(QSERDES_COM_INTEGLOOP_GAIN1_MODE0, 0x00),
+ QMP_PHY_INIT_CFG(QSERDES_COM_INTEGLOOP_GAIN0_MODE0, 0x80),
+ QMP_PHY_INIT_CFG(QSERDES_COM_SSC_EN_CENTER, 0x01),
+ QMP_PHY_INIT_CFG(QSERDES_COM_SSC_PER1, 0x31),
+ QMP_PHY_INIT_CFG(QSERDES_COM_SSC_PER2, 0x01),
+ QMP_PHY_INIT_CFG(QSERDES_COM_SSC_ADJ_PER1, 0x02),
+ QMP_PHY_INIT_CFG(QSERDES_COM_SSC_ADJ_PER2, 0x00),
+ QMP_PHY_INIT_CFG(QSERDES_COM_SSC_STEP_SIZE1, 0x2f),
+ QMP_PHY_INIT_CFG(QSERDES_COM_SSC_STEP_SIZE2, 0x19),
+ QMP_PHY_INIT_CFG(QSERDES_COM_RESCODE_DIV_NUM, 0x15),
+ QMP_PHY_INIT_CFG(QSERDES_COM_BG_TRIM, 0x0f),
+ QMP_PHY_INIT_CFG(QSERDES_COM_PLL_IVCO, 0x0f),
+ QMP_PHY_INIT_CFG(QSERDES_COM_CLK_EP_DIV, 0x19),
+ QMP_PHY_INIT_CFG(QSERDES_COM_CLK_ENABLE1, 0x10),
+ QMP_PHY_INIT_CFG(QSERDES_COM_HSCLK_SEL, 0x00),
+ QMP_PHY_INIT_CFG(QSERDES_COM_RESCODE_DIV_NUM, 0x40),
+};
+
+static const struct qmp_phy_init_tbl pciephy_tx_tbl[] = {
+ QMP_PHY_INIT_CFG(QSERDES_TX_HIGHZ_TRANSCEIVEREN_BIAS_DRVR_EN, 0x45),
+ QMP_PHY_INIT_CFG(QSERDES_TX_LANE_MODE, 0x06),
+};
+
+static const struct qmp_phy_init_tbl pciephy_rx_tbl[] = {
+ QMP_PHY_INIT_CFG(QSERDES_RX_SIGDET_ENABLES, 0x1c),
+ QMP_PHY_INIT_CFG(QSERDES_RX_RX_EQU_ADAPTOR_CNTRL2, 0x01),
+ QMP_PHY_INIT_CFG(QSERDES_RX_RX_EQU_ADAPTOR_CNTRL3, 0x00),
+ QMP_PHY_INIT_CFG(QSERDES_RX_RX_EQU_ADAPTOR_CNTRL4, 0xdb),
+ QMP_PHY_INIT_CFG(QSERDES_RX_RX_BAND, 0x18),
+ QMP_PHY_INIT_CFG(QSERDES_RX_UCDR_SO_GAIN, 0x04),
+ QMP_PHY_INIT_CFG(QSERDES_RX_UCDR_SO_GAIN_HALF, 0x04),
+ QMP_PHY_INIT_CFG(QSERDES_RX_UCDR_SO_SATURATION_AND_ENABLE, 0x4b),
+ QMP_PHY_INIT_CFG(QSERDES_RX_SIGDET_DEGLITCH_CNTRL, 0x14),
+ QMP_PHY_INIT_CFG(QSERDES_RX_SIGDET_LVL, 0x19),
+};
+
+static const struct qmp_phy_init_tbl pciephy_pcs_tbl[] = {
+ QMP_PHY_INIT_CFG(QPHY_RX_IDLE_DTCT_CNTRL, 0x4c),
+ QMP_PHY_INIT_CFG(QPHY_PWRUP_RESET_DLY_TIME_AUXCLK, 0x00),
+ QMP_PHY_INIT_CFG(QPHY_LP_WAKEUP_DLY_TIME_AUXCLK, 0x01),
+
+ QMP_PHY_INIT_CFG_L(QPHY_PLL_LOCK_CHK_DLY_TIME, 0x05),
+
+ QMP_PHY_INIT_CFG(QPHY_ENDPOINT_REFCLK_DRIVE, 0x05),
+ QMP_PHY_INIT_CFG(QPHY_POWER_DOWN_CONTROL, 0x02),
+ QMP_PHY_INIT_CFG(QPHY_POWER_STATE_CONFIG4, 0x00),
+ QMP_PHY_INIT_CFG(QPHY_POWER_STATE_CONFIG1, 0xa3),
+ QMP_PHY_INIT_CFG(QPHY_TXDEEMPH_M3P5DB_V0, 0x0e),
+};
+
+static const struct qmp_phy_init_tbl usb3phy_serdes_tbl[] = {
+ QMP_PHY_INIT_CFG(QSERDES_COM_SYSCLK_EN_SEL, 0x14),
+ QMP_PHY_INIT_CFG(QSERDES_COM_BIAS_EN_CLKBUFLR_EN, 0x08),
+ QMP_PHY_INIT_CFG(QSERDES_COM_CLK_SELECT, 0x30),
+ QMP_PHY_INIT_CFG(QSERDES_COM_CMN_CONFIG, 0x06),
+ QMP_PHY_INIT_CFG(QSERDES_COM_SVS_MODE_CLK_SEL, 0x01),
+ QMP_PHY_INIT_CFG(QSERDES_COM_HSCLK_SEL, 0x00),
+ QMP_PHY_INIT_CFG(QSERDES_COM_BG_TRIM, 0x0f),
+ QMP_PHY_INIT_CFG(QSERDES_COM_PLL_IVCO, 0x0f),
+ QMP_PHY_INIT_CFG(QSERDES_COM_SYS_CLK_CTRL, 0x04),
+ /* PLL and Loop filter settings */
+ QMP_PHY_INIT_CFG(QSERDES_COM_DEC_START_MODE0, 0x82),
+ QMP_PHY_INIT_CFG(QSERDES_COM_DIV_FRAC_START1_MODE0, 0x55),
+ QMP_PHY_INIT_CFG(QSERDES_COM_DIV_FRAC_START2_MODE0, 0x55),
+ QMP_PHY_INIT_CFG(QSERDES_COM_DIV_FRAC_START3_MODE0, 0x03),
+ QMP_PHY_INIT_CFG(QSERDES_COM_CP_CTRL_MODE0, 0x0b),
+ QMP_PHY_INIT_CFG(QSERDES_COM_PLL_RCTRL_MODE0, 0x16),
+ QMP_PHY_INIT_CFG(QSERDES_COM_PLL_CCTRL_MODE0, 0x28),
+ QMP_PHY_INIT_CFG(QSERDES_COM_INTEGLOOP_GAIN0_MODE0, 0x80),
+ QMP_PHY_INIT_CFG(QSERDES_COM_VCO_TUNE_CTRL, 0x00),
+ QMP_PHY_INIT_CFG(QSERDES_COM_LOCK_CMP1_MODE0, 0x15),
+ QMP_PHY_INIT_CFG(QSERDES_COM_LOCK_CMP2_MODE0, 0x34),
+ QMP_PHY_INIT_CFG(QSERDES_COM_LOCK_CMP3_MODE0, 0x00),
+ QMP_PHY_INIT_CFG(QSERDES_COM_CORE_CLK_EN, 0x00),
+ QMP_PHY_INIT_CFG(QSERDES_COM_LOCK_CMP_CFG, 0x00),
+ QMP_PHY_INIT_CFG(QSERDES_COM_VCO_TUNE_MAP, 0x00),
+ QMP_PHY_INIT_CFG(QSERDES_COM_BG_TIMER, 0x0a),
+ /* SSC settings */
+ QMP_PHY_INIT_CFG(QSERDES_COM_SSC_EN_CENTER, 0x01),
+ QMP_PHY_INIT_CFG(QSERDES_COM_SSC_PER1, 0x31),
+ QMP_PHY_INIT_CFG(QSERDES_COM_SSC_PER2, 0x01),
+ QMP_PHY_INIT_CFG(QSERDES_COM_SSC_ADJ_PER1, 0x00),
+ QMP_PHY_INIT_CFG(QSERDES_COM_SSC_ADJ_PER2, 0x00),
+ QMP_PHY_INIT_CFG(QSERDES_COM_SSC_STEP_SIZE1, 0xde),
+ QMP_PHY_INIT_CFG(QSERDES_COM_SSC_STEP_SIZE2, 0x07),
+};
+
+static const struct qmp_phy_init_tbl usb3phy_tx_tbl[] = {
+ QMP_PHY_INIT_CFG(QSERDES_TX_HIGHZ_TRANSCEIVEREN_BIAS_DRVR_EN, 0x45),
+ QMP_PHY_INIT_CFG(QSERDES_TX_RCV_DETECT_LVL_2, 0x12),
+ QMP_PHY_INIT_CFG(QSERDES_TX_LANE_MODE, 0x06),
+};
+
+static const struct qmp_phy_init_tbl usb3phy_rx_tbl[] = {
+ QMP_PHY_INIT_CFG(QSERDES_RX_UCDR_FASTLOCK_FO_GAIN, 0x0b),
+ QMP_PHY_INIT_CFG(QSERDES_RX_UCDR_SO_GAIN, 0x04),
+ QMP_PHY_INIT_CFG(QSERDES_RX_RX_EQU_ADAPTOR_CNTRL2, 0x02),
+ QMP_PHY_INIT_CFG(QSERDES_RX_RX_EQU_ADAPTOR_CNTRL3, 0x4c),
+ QMP_PHY_INIT_CFG(QSERDES_RX_RX_EQU_ADAPTOR_CNTRL4, 0xbb),
+ QMP_PHY_INIT_CFG(QSERDES_RX_RX_EQ_OFFSET_ADAPTOR_CNTRL1, 0x77),
+ QMP_PHY_INIT_CFG(QSERDES_RX_RX_OFFSET_ADAPTOR_CNTRL2, 0x80),
+ QMP_PHY_INIT_CFG(QSERDES_RX_SIGDET_CNTRL, 0x03),
+ QMP_PHY_INIT_CFG(QSERDES_RX_SIGDET_LVL, 0x18),
+ QMP_PHY_INIT_CFG(QSERDES_RX_SIGDET_DEGLITCH_CNTRL, 0x16),
+};
+
+static const struct qmp_phy_init_tbl usb3phy_pcs_tbl[] = {
+ /* FLL settings */
+ QMP_PHY_INIT_CFG_L(QPHY_FLL_CNTRL2, 0x03),
+ QMP_PHY_INIT_CFG_L(QPHY_FLL_CNTRL1, 0x02),
+ QMP_PHY_INIT_CFG_L(QPHY_FLL_CNT_VAL_L, 0x09),
+ QMP_PHY_INIT_CFG_L(QPHY_FLL_CNT_VAL_H_TOL, 0x42),
+ QMP_PHY_INIT_CFG_L(QPHY_FLL_MAN_CODE, 0x85),
+
+ /* Lock Det settings */
+ QMP_PHY_INIT_CFG(QPHY_LOCK_DETECT_CONFIG1, 0xd1),
+ QMP_PHY_INIT_CFG(QPHY_LOCK_DETECT_CONFIG2, 0x1f),
+ QMP_PHY_INIT_CFG(QPHY_LOCK_DETECT_CONFIG3, 0x47),
+ QMP_PHY_INIT_CFG(QPHY_POWER_STATE_CONFIG2, 0x08),
+};
+
+/* struct qmp_phy_cfg - per-PHY initialization config */
+struct qmp_phy_cfg {
+ /* phy-type - PCIE/UFS/USB */
+ unsigned int type;
+ /* number of lanes provided by phy */
+ int nlanes;
+
+ /* Init sequence for PHY blocks - serdes, tx, rx, pcs */
+ const struct qmp_phy_init_tbl *serdes_tbl;
+ int serdes_tbl_num;
+ const struct qmp_phy_init_tbl *tx_tbl;
+ int tx_tbl_num;
+ const struct qmp_phy_init_tbl *rx_tbl;
+ int rx_tbl_num;
+ const struct qmp_phy_init_tbl *pcs_tbl;
+ int pcs_tbl_num;
+
+ /* array of registers with different offsets */
+ const unsigned int *regs;
+
+ unsigned int start_ctrl;
+ unsigned int pwr_dn_ctrl;
+ unsigned int mask_pcs_ready;
+ unsigned int mask_com_pcs_ready;
+
+ /* true, if PHY has a separate PHY_COM control block */
+ bool has_phy_com_ctrl;
+ /* true, if PHY has a reset for individual lanes */
+ bool has_lane_rst;
+};
+
+/**
+ * struct qmp_phy_desc - per-lane phy-descriptor
+ *
+ * @phy: generic phy
+ * @tx: iomapped memory space for lane's tx
+ * @rx: iomapped memory space for lane's rx
+ * @pcs: iomapped memory space for lane's pcs
+ * @pipe_clk: pipe lock
+ * @index: lane index
+ * @qphy: QMP phy to which this lane belongs
+ * @lane_rst: lane's reset controller
+ */
+struct qmp_phy_desc {
+ struct phy *phy;
+ void __iomem *tx;
+ void __iomem *rx;
+ void __iomem *pcs;
+ struct clk *pipe_clk;
+ unsigned int index;
+ struct qcom_qmp_phy *qphy;
+ struct reset_control *lane_rst;
+};
+
+/**
+ * struct qcom_qmp_phy - structure holding QMP phy attributes
+ *
+ * @dev: device
+ * @serdes: iomapped memory space for phy's serdes
+ *
+ * @aux_clk: phy core clock
+ * @cfg_ahb_clk: AHB2PHY interface clock
+ * @ref_clk: reference clock
+ *
+ * @vdda_phy: vdd supply to the phy core block
+ * @vdda_pll: 1.8V vdd supply to ref_clk block
+ * @vddp_ref_clk: vdd supply to specific ref_clk block (Optional)
+ *
+ * @phy_rst: phy reset control
+ * @phycom_rst: phy common reset control
+ * @phycfg_rst: phy ahb cfg reset control (Optional)
+ *
+ * @cfg: phy specific configuration
+ * @phys: array of per-lane phy descriptors
+ * @phy_mutex: mutex lock for PHY common block initialization
+ * @init_count: phy common block initialization count
+ */
+struct qcom_qmp_phy {
+ struct device *dev;
+ void __iomem *serdes;
+
+ struct clk *aux_clk;
+ struct clk *cfg_ahb_clk;
+ struct clk *ref_clk;
+
+ struct regulator *vdda_phy;
+ struct regulator *vdda_pll;
+ struct regulator *vddp_ref_clk;
+
+ struct reset_control *phy_rst;
+ struct reset_control *phycom_rst;
+ struct reset_control *phycfg_rst;
+
+ const struct qmp_phy_cfg *cfg;
+ struct qmp_phy_desc **phys;
+
+ struct mutex phy_mutex;
+ int init_count;
+};
+
+static inline void qphy_setbits(void __iomem *reg, u32 val)
+{
+ u32 reg_val;
+
+ reg_val = readl_relaxed(reg);
+ reg_val |= val;
+ writel_relaxed(reg_val, reg);
+
+ /* Make sure that above writes are completed */
+ mb();
+}
+
+static inline void qphy_clrbits(void __iomem *reg, u32 val)
+{
+ u32 reg_val;
+
+ reg_val = readl_relaxed(reg);
+ reg_val &= ~val;
+ writel_relaxed(reg_val, reg);
+
+ /* Make sure that above writes are completed */
+ mb();
+}
+
+static const struct qmp_phy_cfg msm8996_pciephy_cfg = {
+ .type = PHY_TYPE_PCIE,
+ .nlanes = 3,
+
+ .serdes_tbl = pciephy_serdes_tbl,
+ .serdes_tbl_num = ARRAY_SIZE(pciephy_serdes_tbl),
+ .tx_tbl = pciephy_tx_tbl,
+ .tx_tbl_num = ARRAY_SIZE(pciephy_tx_tbl),
+ .rx_tbl = pciephy_rx_tbl,
+ .rx_tbl_num = ARRAY_SIZE(pciephy_rx_tbl),
+ .pcs_tbl = pciephy_pcs_tbl,
+ .pcs_tbl_num = ARRAY_SIZE(pciephy_pcs_tbl),
+ .regs = pciephy_regs_layout,
+ .start_ctrl = PCS_START | PLL_READY_GATE_EN,
+ .pwr_dn_ctrl = SW_PWRDN | REFCLK_DRV_DSBL,
+ .mask_com_pcs_ready = PCS_READY,
+
+ .has_phy_com_ctrl = true,
+ .has_lane_rst = true,
+};
+
+static const struct qmp_phy_cfg msm8996_usb3phy_cfg = {
+ .type = PHY_TYPE_USB3,
+ .nlanes = 1,
+
+ .serdes_tbl = usb3phy_serdes_tbl,
+ .serdes_tbl_num = ARRAY_SIZE(usb3phy_serdes_tbl),
+ .tx_tbl = usb3phy_tx_tbl,
+ .tx_tbl_num = ARRAY_SIZE(usb3phy_tx_tbl),
+ .rx_tbl = usb3phy_rx_tbl,
+ .rx_tbl_num = ARRAY_SIZE(usb3phy_rx_tbl),
+ .pcs_tbl = usb3phy_pcs_tbl,
+ .pcs_tbl_num = ARRAY_SIZE(usb3phy_pcs_tbl),
+ .regs = usb3phy_regs_layout,
+ .start_ctrl = SERDES_START | PCS_START,
+ .pwr_dn_ctrl = SW_PWRDN,
+ .mask_pcs_ready = PHYSTATUS,
+};
+
+static void qcom_qmp_phy_configure(void __iomem *base,
+ const unsigned int *regs,
+ const struct qmp_phy_init_tbl tbl[],
+ int num)
+{
+ int i;
+ const struct qmp_phy_init_tbl *t = tbl;
+
+ for (i = 0; i < num; i++, t++) {
+ if (t->in_layout)
+ writel_relaxed(t->val, base + regs[t->offset]);
+ else
+ writel_relaxed(t->val, base + t->offset);
+ }
+
+ /* flush buffered writes */
+ mb();
+}
+
+static int qcom_qmp_phy_poweron(struct phy *phy)
+{
+ struct qmp_phy_desc *phydesc = phy_get_drvdata(phy);
+ struct qcom_qmp_phy *qphy = phydesc->qphy;
+ int ret;
+
+ dev_vdbg(&phy->dev, "Powering on QMP phy\n");
+
+ ret = regulator_enable(qphy->vdda_phy);
+ if (ret) {
+ dev_err(qphy->dev, "%s: vdda-phy enable failed, err=%d\n",
+ __func__, ret);
+ return ret;
+ }
+
+ ret = regulator_enable(qphy->vdda_pll);
+ if (ret) {
+ dev_err(qphy->dev, "%s: vdda-pll enable failed, err=%d\n",
+ __func__, ret);
+ goto err;
+ }
+
+ ret = regulator_enable(qphy->vddp_ref_clk);
+ if (ret) {
+ dev_err(qphy->dev,
+ "%s: vdda-ref-clk enable failed, err=%d\n",
+ __func__, ret);
+ goto err1;
+ }
+
+ ret = clk_prepare_enable(qphy->ref_clk);
+ if (ret) {
+ dev_err(qphy->dev, "%s: ref_clk enable failed, err=%d\n",
+ __func__, ret);
+ goto err2;
+ }
+
+ ret = clk_prepare_enable(phydesc->pipe_clk);
+ if (ret) {
+ dev_err(qphy->dev, "%s: pipe_clk enable failed, err=%d\n",
+ __func__, ret);
+ goto err3;
+ }
+
+ return 0;
+
+err3:
+ clk_disable_unprepare(qphy->ref_clk);
+err2:
+ regulator_disable(qphy->vddp_ref_clk);
+err1:
+ regulator_disable(qphy->vdda_pll);
+err:
+ regulator_disable(qphy->vdda_phy);
+ return ret;
+}
+
+static int qcom_qmp_phy_poweroff(struct phy *phy)
+{
+ struct qmp_phy_desc *phydesc = phy_get_drvdata(phy);
+ struct qcom_qmp_phy *qphy = phydesc->qphy;
+
+ clk_disable_unprepare(phydesc->pipe_clk);
+ clk_disable_unprepare(qphy->ref_clk);
+
+ regulator_disable(qphy->vddp_ref_clk);
+ regulator_disable(qphy->vdda_pll);
+ regulator_disable(qphy->vdda_phy);
+
+ return 0;
+}
+
+static int qcom_qmp_phy_com_init(struct qcom_qmp_phy *qphy)
+{
+ const struct qmp_phy_cfg *cfg = qphy->cfg;
+ void __iomem *serdes = qphy->serdes;
+ int ret;
+
+ mutex_lock(&qphy->phy_mutex);
+ if (qphy->init_count++) {
+ mutex_unlock(&qphy->phy_mutex);
+ return 0;
+ }
+
+ ret = reset_control_deassert(qphy->phy_rst);
+ if (ret) {
+ dev_err(qphy->dev, "phy reset deassert failed\n");
+ goto err;
+ }
+
+ ret = reset_control_deassert(qphy->phycom_rst);
+ if (ret) {
+ dev_err(qphy->dev, "common reset deassert failed\n");
+ goto err1;
+ }
+
+ if (qphy->phycfg_rst) {
+ ret = reset_control_deassert(qphy->phycfg_rst);
+ if (ret) {
+ dev_err(qphy->dev, "ahb cfg reset deassert failed\n");
+ goto err2;
+ }
+ }
+
+ if (cfg->has_phy_com_ctrl)
+ qphy_setbits(serdes + cfg->regs[QPHY_COM_POWER_DOWN_CONTROL],
+ SW_PWRDN);
+
+ /* Serdes configuration */
+ qcom_qmp_phy_configure(serdes, cfg->regs, cfg->serdes_tbl,
+ cfg->serdes_tbl_num);
+
+ if (cfg->has_phy_com_ctrl) {
+ void __iomem *status;
+ unsigned int mask, val;
+
+ qphy_clrbits(serdes + cfg->regs[QPHY_COM_SW_RESET],
+ SW_RESET);
+ qphy_setbits(serdes + cfg->regs[QPHY_COM_START_CONTROL],
+ SERDES_START | PCS_START);
+
+ status = serdes + cfg->regs[QPHY_COM_PCS_READY_STATUS];
+ mask = cfg->mask_com_pcs_ready;
+
+ ret = readl_poll_timeout(status, val, (val & mask), 10,
+ PHY_INIT_COMPLETE_TIMEOUT);
+ if (ret) {
+ dev_err(qphy->dev,
+ "phy common block init timed-out\n");
+ goto err3;
+ }
+ }
+
+ mutex_unlock(&qphy->phy_mutex);
+
+ return 0;
+
+err3:
+ if (qphy->phycfg_rst)
+ reset_control_assert(qphy->phycfg_rst);
+err2:
+ reset_control_assert(qphy->phycom_rst);
+err1:
+ reset_control_assert(qphy->phy_rst);
+err:
+ mutex_unlock(&qphy->phy_mutex);
+ return ret;
+}
+
+static int qcom_qmp_phy_com_exit(struct qcom_qmp_phy *qphy)
+{
+ const struct qmp_phy_cfg *cfg = qphy->cfg;
+ void __iomem *serdes = qphy->serdes;
+
+ mutex_lock(&qphy->phy_mutex);
+ if (--qphy->init_count) {
+ mutex_unlock(&qphy->phy_mutex);
+ return 0;
+ }
+
+ if (cfg->has_phy_com_ctrl) {
+ qphy_setbits(serdes + cfg->regs[QPHY_COM_START_CONTROL],
+ SERDES_START | PCS_START);
+ qphy_clrbits(serdes + cfg->regs[QPHY_COM_SW_RESET],
+ SW_RESET);
+ qphy_setbits(serdes + cfg->regs[QPHY_COM_POWER_DOWN_CONTROL],
+ SW_PWRDN);
+ }
+
+ if (qphy->phycfg_rst)
+ reset_control_assert(qphy->phycfg_rst);
+
+ reset_control_assert(qphy->phycom_rst);
+ reset_control_assert(qphy->phy_rst);
+
+ mutex_unlock(&qphy->phy_mutex);
+
+ return 0;
+}
+
+/* PHY Initialization */
+static int qcom_qmp_phy_init(struct phy *phy)
+{
+ struct qmp_phy_desc *phydesc = phy_get_drvdata(phy);
+ struct qcom_qmp_phy *qphy = phydesc->qphy;
+ const struct qmp_phy_cfg *cfg = qphy->cfg;
+ void __iomem *tx = phydesc->tx;
+ void __iomem *rx = phydesc->rx;
+ void __iomem *pcs = phydesc->pcs;
+ void __iomem *status;
+ unsigned int mask, val;
+ int ret;
+
+ dev_vdbg(qphy->dev, "Initializing QMP phy\n");
+
+ /* enable interface clocks to program phy */
+ ret = clk_prepare_enable(qphy->aux_clk);
+ if (ret) {
+ dev_err(qphy->dev, "failed to enable aux clk, err=%d\n", ret);
+ return ret;
+ }
+
+ ret = clk_prepare_enable(qphy->cfg_ahb_clk);
+ if (ret) {
+ dev_err(qphy->dev, "failed to enable cfg ahb clk, err=%d\n",
+ ret);
+ goto err;
+ }
+
+ ret = qcom_qmp_phy_com_init(qphy);
+ if (ret)
+ goto err_com_init;
+
+ if (cfg->has_lane_rst) {
+ ret = reset_control_deassert(phydesc->lane_rst);
+ if (ret) {
+ dev_err(qphy->dev, "lane%d reset deassert failed\n",
+ phydesc->index);
+ goto err_lane_rst;
+ }
+ }
+
+ /* Tx, Rx, and PCS configurations */
+ qcom_qmp_phy_configure(tx, cfg->regs, cfg->tx_tbl, cfg->tx_tbl_num);
+ qcom_qmp_phy_configure(rx, cfg->regs, cfg->rx_tbl, cfg->rx_tbl_num);
+ qcom_qmp_phy_configure(pcs, cfg->regs, cfg->pcs_tbl, cfg->pcs_tbl_num);
+
+ /*
+ * Pull out PHY from POWER DOWN state.
+ * This is active low enable signal to power-down PHY.
+ */
+ qphy_setbits(pcs + QPHY_POWER_DOWN_CONTROL, cfg->pwr_dn_ctrl);
+
+ /* phy power down delay; given in PCIE phy programming guide only */
+ if (qphy->cfg->type == PHY_TYPE_PCIE)
+ usleep_range(POWER_DOWN_DELAY_US_MIN, POWER_DOWN_DELAY_US_MAX);
+
+ /* start SerDes and Phy-Coding-Sublayer */
+ qphy_setbits(pcs + QPHY_START_CTRL, cfg->start_ctrl);
+
+ /* Pull PHY out of reset state */
+ qphy_clrbits(pcs + QPHY_SW_RESET, SW_RESET);
+
+ status = pcs + cfg->regs[QPHY_PCS_READY_STATUS];
+ mask = cfg->mask_pcs_ready;
+
+ ret = !mask ? 0 : readl_poll_timeout(status, val, !(val & mask), 1,
+ PHY_INIT_COMPLETE_TIMEOUT);
+ if (ret) {
+ dev_err(qphy->dev, "phy initialization timed-out\n");
+ goto err_pcs_ready;
+ }
+
+ return ret;
+
+err_pcs_ready:
+ if (cfg->has_lane_rst)
+ reset_control_assert(phydesc->lane_rst);
+err_lane_rst:
+ qcom_qmp_phy_com_exit(qphy);
+err_com_init:
+ clk_disable_unprepare(qphy->cfg_ahb_clk);
+err:
+ clk_disable_unprepare(qphy->aux_clk);
+ return ret;
+}
+
+static int qcom_qmp_phy_exit(struct phy *phy)
+{
+ struct qmp_phy_desc *phydesc = phy_get_drvdata(phy);
+ struct qcom_qmp_phy *qphy = phydesc->qphy;
+ const struct qmp_phy_cfg *cfg = qphy->cfg;
+
+ /* PHY reset */
+ qphy_setbits(phydesc->pcs + QPHY_SW_RESET, SW_RESET);
+
+ /* stop SerDes and Phy-Coding-Sublayer */
+ qphy_clrbits(phydesc->pcs + QPHY_START_CTRL, cfg->start_ctrl);
+
+ /* Put PHY into POWER DOWN state: active low */
+ qphy_clrbits(phydesc->pcs + QPHY_POWER_DOWN_CONTROL,
+ cfg->pwr_dn_ctrl);
+
+ if (cfg->has_lane_rst)
+ reset_control_assert(phydesc->lane_rst);
+
+ qcom_qmp_phy_com_exit(qphy);
+
+ clk_disable_unprepare(qphy->aux_clk);
+ clk_disable_unprepare(qphy->cfg_ahb_clk);
+
+ return 0;
+}
+
+
+static int qcom_qmp_phy_regulator_init(struct device *dev)
+{
+ struct qcom_qmp_phy *qphy = dev_get_drvdata(dev);
+ int ret;
+
+ qphy->vdda_phy = devm_regulator_get(dev, "vdda-phy");
+ if (IS_ERR(qphy->vdda_phy)) {
+ ret = PTR_ERR(qphy->vdda_phy);
+ if (ret != -EPROBE_DEFER)
+ dev_err(dev, "failed to get vdda-phy, %d\n", ret);
+ return ret;
+ }
+
+ qphy->vdda_pll = devm_regulator_get(dev, "vdda-pll");
+ if (IS_ERR(qphy->vdda_pll)) {
+ ret = PTR_ERR(qphy->vdda_pll);
+ if (ret != -EPROBE_DEFER)
+ dev_err(dev, "failed to get vdda-pll, %d\n", ret);
+ return ret;
+ }
+
+ /* optional regulator */
+ qphy->vddp_ref_clk = devm_regulator_get(dev, "vddp-ref-clk");
+ if (IS_ERR(qphy->vddp_ref_clk)) {
+ if (PTR_ERR(qphy->vddp_ref_clk) == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+ dev_dbg(dev, "failed to get vddp-ref-clk, %d\n", ret);
+ }
+
+ return 0;
+}
+
+static int qcom_qmp_phy_clk_init(struct device *dev)
+{
+ struct qcom_qmp_phy *qphy = dev_get_drvdata(dev);
+ int ret;
+
+ qphy->aux_clk = devm_clk_get(dev, "aux");
+ if (IS_ERR(qphy->aux_clk)) {
+ ret = PTR_ERR(qphy->aux_clk);
+ if (ret != -EPROBE_DEFER)
+ dev_err(dev, "failed to get aux_clk, %d\n", ret);
+ return ret;
+ }
+
+ qphy->cfg_ahb_clk = devm_clk_get(dev, "cfg_ahb");
+ if (IS_ERR(qphy->cfg_ahb_clk)) {
+ ret = PTR_ERR(qphy->cfg_ahb_clk);
+ if (ret != -EPROBE_DEFER)
+ dev_err(dev, "failed to get cfg_ahb_clk, %d\n", ret);
+ return ret;
+ }
+
+ qphy->ref_clk = devm_clk_get(dev, "ref");
+ if (IS_ERR(qphy->ref_clk)) {
+ ret = PTR_ERR(qphy->ref_clk);
+ if (ret != -EPROBE_DEFER)
+ dev_err(dev, "failed to get ref_clk, %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static struct phy *qcom_qmp_phy_xlate(struct device *dev,
+ struct of_phandle_args *args)
+{
+ struct qcom_qmp_phy *qphy = dev_get_drvdata(dev);
+ int i;
+
+ if (WARN_ON(args->args[0] >= qphy->cfg->nlanes))
+ return ERR_PTR(-ENODEV);
+
+ for (i = 0; i < qphy->cfg->nlanes; i++)
+ /* phys[i]->index */
+ if (i == args->args[0])
+ return qphy->phys[i]->phy;
+
+ return ERR_PTR(-ENODEV);
+}
+
+static const struct phy_ops qcom_qmp_phy_gen_ops = {
+ .init = qcom_qmp_phy_init,
+ .exit = qcom_qmp_phy_exit,
+ .power_on = qcom_qmp_phy_poweron,
+ .power_off = qcom_qmp_phy_poweroff,
+ .owner = THIS_MODULE,
+};
+
+static
+struct qmp_phy_desc *qcom_qmp_phy_create(struct platform_device *pdev, int id)
+{
+ struct device *dev = &pdev->dev;
+ struct qcom_qmp_phy *qphy = dev_get_drvdata(dev);
+ struct phy *generic_phy;
+ struct qmp_phy_desc *phy_desc;
+ struct resource *res;
+ void __iomem *base;
+ char prop_name[MAX_PROP_NAME];
+ unsigned int lane_offsets[3];
+ int ret;
+
+ /* mem resources from index 1 to N for N number of lanes */
+ res = platform_get_resource(pdev, IORESOURCE_MEM, id + 1);
+ base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(base))
+ return ERR_CAST(base);
+
+ phy_desc = devm_kzalloc(dev, sizeof(*phy_desc), GFP_KERNEL);
+ if (!phy_desc)
+ return ERR_PTR(-ENOMEM);
+
+ /*
+ * read offsets to Tx, Rx, and PCS blocks into a u32 array:
+ * +------------------------------------+
+ * | tx offset | rx offset | pcs offset |
+ * +------------------------------------+
+ */
+ ret = of_property_read_u32_array(dev->of_node, "lane-offsets",
+ lane_offsets, 3);
+ if (ret) {
+ dev_err(dev, "failed to get tx/rx/pcs offsets for lane%d\n",
+ id);
+ return ERR_PTR(ret);
+ }
+
+ phy_desc->tx = base + lane_offsets[0];
+ phy_desc->rx = base + lane_offsets[1];
+ phy_desc->pcs = base + lane_offsets[2];
+
+ /*
+ * Get PHY's Pipe clock, if any; USB3 and PCIe are PIPE3
+ * based phys, so they essentially have pipe clock. So,
+ * we return error in case phy is USB3 or PIPE type.
+ * Otherwise, we initialize pipe clock to NULL for
+ * all phys that don't need this.
+ */
+ memset(&prop_name, 0, sizeof(prop_name));
+ snprintf(prop_name, MAX_PROP_NAME, "pipe%d", id);
+ phy_desc->pipe_clk = devm_clk_get(dev, prop_name);
+ if (IS_ERR(phy_desc->pipe_clk)) {
+ if (qphy->cfg->type == PHY_TYPE_PCIE ||
+ qphy->cfg->type == PHY_TYPE_USB3) {
+ ret = PTR_ERR(phy_desc->pipe_clk);
+ if (ret != -EPROBE_DEFER)
+ dev_err(dev,
+ "failed to get lane%d pipe_clk, %d\n",
+ id, ret);
+ return ERR_PTR(ret);
+ }
+ phy_desc->pipe_clk = NULL;
+ }
+
+ /* Get lane reset, if any */
+ if (qphy->cfg->has_lane_rst) {
+ memset(&prop_name, 0, sizeof(prop_name));
+ snprintf(prop_name, MAX_PROP_NAME, "lane%d", id);
+ phy_desc->lane_rst = devm_reset_control_get(dev,
+ prop_name);
+ if (IS_ERR(phy_desc->lane_rst)) {
+ dev_err(dev, "failed to get lane%d reset\n", id);
+ return ERR_CAST(phy_desc->lane_rst);
+ }
+ }
+
+ generic_phy = devm_phy_create(dev, NULL, &qcom_qmp_phy_gen_ops);
+ if (IS_ERR(generic_phy)) {
+ ret = PTR_ERR(generic_phy);
+ dev_err(dev, "failed to create qphy %d\n", ret);
+ return ERR_PTR(ret);
+ }
+
+ phy_desc->phy = generic_phy;
+ phy_desc->index = id;
+ phy_desc->qphy = qphy;
+ phy_set_drvdata(generic_phy, phy_desc);
+
+ return phy_desc;
+}
+
+static const struct of_device_id qcom_qmp_phy_of_match_table[] = {
+ {
+ .compatible = "qcom,msm8996-qmp-pcie-phy",
+ .data = &msm8996_pciephy_cfg,
+ }, {
+ .compatible = "qcom,msm8996-qmp-usb3-phy",
+ .data = &msm8996_usb3phy_cfg,
+ },
+ { },
+};
+MODULE_DEVICE_TABLE(of, qcom_qmp_phy_of_match_table);
+
+/*
+ * The <s>_pipe_clksrc generated by PHY goes to the GCC that gate
+ * controls it. The <s>_pipe_clk coming out of the GCC is requested
+ * by the PHY driver for its operations.
+ * We register the <s>_pipe_clksrc here. The gcc driver takes care
+ * of assigning this <s>_pipe_clksrc as parent to <s>_pipe_clk.
+ * Below picture shows this relationship.
+ *
+ * +--------------+
+ * | PHY block |<<---------------------------------------+
+ * | | |
+ * | +-------+ | +-----+ |
+ * I/P---^-->| PLL |--^--->pipe_clksrc--->| GCC |--->pipe_clk---+
+ * clk | +-------+ | +-----+
+ * +--------------+
+ *
+ */
+static int phy_pipe_clk_register(struct qcom_qmp_phy *qphy, int id)
+{
+ char clk_name[MAX_PROP_NAME];
+ struct clk *clk;
+
+ memset(&clk_name, 0, sizeof(clk_name));
+ switch (qphy->cfg->type) {
+ case PHY_TYPE_USB3:
+ snprintf(clk_name, MAX_PROP_NAME, "usb3_phy_pipe_clk_src");
+ break;
+ case PHY_TYPE_PCIE:
+ snprintf(clk_name, MAX_PROP_NAME, "pcie_%d_pipe_clk_src", id);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ /* controllers using QMP phys use 125MHz pipe clock interface */
+ clk = clk_register_fixed_rate(qphy->dev, clk_name, NULL, 0, 125000000);
+
+ return PTR_ERR_OR_ZERO(clk);
+}
+
+static int qcom_qmp_phy_probe(struct platform_device *pdev)
+{
+ struct qcom_qmp_phy *qphy;
+ struct device *dev = &pdev->dev;
+ struct phy_provider *phy_provider;
+ struct resource *res;
+ void __iomem *base;
+ int ret;
+ int id;
+
+ qphy = devm_kzalloc(dev, sizeof(*qphy), GFP_KERNEL);
+ if (!qphy)
+ return -ENOMEM;
+
+ qphy->dev = dev;
+ dev_set_drvdata(dev, qphy);
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(base))
+ return PTR_ERR(base);
+
+ /* per PHY serdes; usually located at base address */
+ qphy->serdes = base;
+
+ mutex_init(&qphy->phy_mutex);
+
+ /* Get the specific init parameters of QMP phy */
+ qphy->cfg = of_device_get_match_data(dev);
+
+ ret = qcom_qmp_phy_clk_init(dev);
+ if (ret)
+ return ret;
+
+ ret = qcom_qmp_phy_regulator_init(dev);
+ if (ret)
+ return ret;
+
+ qphy->phy_rst = devm_reset_control_get(dev, "phy");
+ if (IS_ERR(qphy->phy_rst)) {
+ dev_err(dev, "failed to get phy core reset\n");
+ return PTR_ERR(qphy->phy_rst);
+ }
+
+ qphy->phycom_rst = devm_reset_control_get(dev, "common");
+ if (IS_ERR(qphy->phycom_rst)) {
+ dev_err(dev, "failed to get phy common reset\n");
+ return PTR_ERR(qphy->phycom_rst);
+ }
+
+ qphy->phycfg_rst = devm_reset_control_get(dev, "cfg");
+ if (IS_ERR(qphy->phycfg_rst)) {
+ dev_dbg(dev, "failed to get phy ahb cfg reset\n");
+ qphy->phycfg_rst = NULL;
+ }
+
+
+ qphy->phys = devm_kcalloc(dev, qphy->cfg->nlanes,
+ sizeof(*qphy->phys), GFP_KERNEL);
+ if (!qphy->phys)
+ return -ENOMEM;
+
+ for (id = 0; id < qphy->cfg->nlanes; id++) {
+ /* Create per-lane phy */
+ qphy->phys[id] = qcom_qmp_phy_create(pdev, id);
+ if (IS_ERR(qphy->phys[id])) {
+ dev_err(dev, "failed to create lane%d phy, %d\n",
+ id, ret);
+ return PTR_ERR(qphy->phys[id]);
+ }
+
+ /*
+ * Register the pipe clock provided by phy.
+ * See function description to see details of this pipe clock.
+ */
+ ret = phy_pipe_clk_register(qphy, id);
+ if (ret) {
+ dev_err(qphy->dev,
+ "failed to register pipe clock source\n");
+ return ret;
+ }
+ }
+
+ phy_provider = devm_of_phy_provider_register(dev, qcom_qmp_phy_xlate);
+ if (IS_ERR(phy_provider)) {
+ ret = PTR_ERR(phy_provider);
+ dev_err(dev, "failed to register qphy, %d\n", ret);
+ }
+
+ return ret;
+}
+
+static struct platform_driver qcom_qmp_phy_driver = {
+ .probe = qcom_qmp_phy_probe,
+ .driver = {
+ .name = "qcom-qmp-phy",
+ .of_match_table = of_match_ptr(qcom_qmp_phy_of_match_table),
+ },
+};
+
+module_platform_driver(qcom_qmp_phy_driver);
+
+MODULE_AUTHOR("Vivek Gautam <vivek.gautam@codeaurora.org>");
+MODULE_DESCRIPTION("Qualcomm QMP PHY driver");
+MODULE_LICENSE("GPL v2");
--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project
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