[PATCH v3 3/3] phy: freescale: imx8qm-hsio: Add i.MX8QM HSIO PHY driver support
Richard Zhu
hongxing.zhu at nxp.com
Tue Apr 23 23:21:23 PDT 2024
Add i.MX8QM HSIO PHY driver support.
Signed-off-by: Richard Zhu <hongxing.zhu at nxp.com>
---
drivers/phy/freescale/Kconfig | 8 +
drivers/phy/freescale/Makefile | 1 +
drivers/phy/freescale/phy-fsl-imx8qm-hsio.c | 607 ++++++++++++++++++++
3 files changed, 616 insertions(+)
create mode 100644 drivers/phy/freescale/phy-fsl-imx8qm-hsio.c
diff --git a/drivers/phy/freescale/Kconfig b/drivers/phy/freescale/Kconfig
index 853958fb2c06..c9ee48aeea9e 100644
--- a/drivers/phy/freescale/Kconfig
+++ b/drivers/phy/freescale/Kconfig
@@ -35,6 +35,14 @@ config PHY_FSL_IMX8M_PCIE
Enable this to add support for the PCIE PHY as found on
i.MX8M family of SOCs.
+config PHY_FSL_IMX8QM_HSIO
+ tristate "Freescale i.MX8QM HSIO PHY"
+ depends on OF && HAS_IOMEM
+ select GENERIC_PHY
+ help
+ Enable this to add support for the HSIO PHY as found on
+ i.MX8QM family of SOCs.
+
endif
config PHY_FSL_LYNX_28G
diff --git a/drivers/phy/freescale/Makefile b/drivers/phy/freescale/Makefile
index cedb328bc4d2..b56b4d5c18ea 100644
--- a/drivers/phy/freescale/Makefile
+++ b/drivers/phy/freescale/Makefile
@@ -3,4 +3,5 @@ obj-$(CONFIG_PHY_FSL_IMX8MQ_USB) += phy-fsl-imx8mq-usb.o
obj-$(CONFIG_PHY_MIXEL_LVDS_PHY) += phy-fsl-imx8qm-lvds-phy.o
obj-$(CONFIG_PHY_MIXEL_MIPI_DPHY) += phy-fsl-imx8-mipi-dphy.o
obj-$(CONFIG_PHY_FSL_IMX8M_PCIE) += phy-fsl-imx8m-pcie.o
+obj-$(CONFIG_PHY_FSL_IMX8QM_HSIO) += phy-fsl-imx8qm-hsio.o
obj-$(CONFIG_PHY_FSL_LYNX_28G) += phy-fsl-lynx-28g.o
diff --git a/drivers/phy/freescale/phy-fsl-imx8qm-hsio.c b/drivers/phy/freescale/phy-fsl-imx8qm-hsio.c
new file mode 100644
index 000000000000..b3e17163e859
--- /dev/null
+++ b/drivers/phy/freescale/phy-fsl-imx8qm-hsio.c
@@ -0,0 +1,607 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2024 NXP
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/iopoll.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+#include <linux/pci_regs.h>
+#include <linux/phy/phy.h>
+#include <linux/phy/pcie.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+#include <dt-bindings/phy/phy.h>
+#include <dt-bindings/phy/phy-imx8-pcie.h>
+
+#define MAX_NUM_PHY_MIXS 4
+#define PHY_MIX_MAX_NUM_LANES 2
+#define LANE_NUM_CLKS 5
+
+/* Parameters for the waiting for PCIe PHY PLL to lock */
+#define PHY_INIT_WAIT_USLEEP_MAX 10
+#define PHY_INIT_WAIT_TIMEOUT (1000 * PHY_INIT_WAIT_USLEEP_MAX)
+
+/* i.MX8Q HSIO registers */
+#define HSIO_CTRL0 0x0
+#define HSIO_APB_RSTN_0 BIT(0)
+#define HSIO_APB_RSTN_1 BIT(1)
+#define HSIO_PIPE_RSTN_0_MASK GENMASK(25, 24)
+#define HSIO_PIPE_RSTN_1_MASK GENMASK(27, 26)
+#define HSIO_MODE_MASK GENMASK(20, 17)
+#define HSIO_MODE_PCIE 0x0
+#define HSIO_MODE_SATA 0x4
+#define HSIO_DEVICE_TYPE_MASK GENMASK(27, 24)
+#define HSIO_EPCS_TXDEEMP BIT(5)
+#define HSIO_EPCS_TXDEEMP_SEL BIT(6)
+#define HSIO_EPCS_PHYRESET_N BIT(7)
+#define HSIO_RESET_N BIT(12)
+
+#define HSIO_IOB_RXENA BIT(0)
+#define HSIO_IOB_TXENA BIT(1)
+#define HSIO_IOB_A_0_TXOE BIT(2)
+#define HSIO_IOB_A_0_M1M0_2 BIT(4)
+#define HSIO_IOB_A_0_M1M0_MASK GENMASK(4, 3)
+#define HSIO_PHYX1_EPCS_SEL BIT(12)
+#define HSIO_PCIE_AB_SELECT BIT(13)
+
+#define HSIO_PHY_STS0 0x4
+#define HSIO_LANE0_TX_PLL_LOCK BIT(4)
+#define HSIO_LANE1_TX_PLL_LOCK BIT(12)
+
+#define HSIO_CTRL2 0x8
+#define HSIO_LTSSM_ENABLE BIT(4)
+#define HSIO_BUTTON_RST_N BIT(21)
+#define HSIO_PERST_N BIT(22)
+#define HSIO_POWER_UP_RST_N BIT(23)
+
+#define HSIO_PCIE_STS0 0xc
+#define HSIO_PM_REQ_CORE_RST BIT(19)
+
+#define HSIO_REG48_PMA_STATUS 0x30
+#define HSIO_REG48_PMA_RDY BIT(7)
+
+/*
+ * There are three lanes PHY in i.MX8QM HSIO, and can be made up the
+ * following PHY modes in different use cases.
+ * +------------------------------------+
+ * | index | LAN0 | LAN1 | LAN2 |
+ * |------------------------------------|
+ * | 0 | PCIEA | | |
+ * |------------------------------------|
+ * | 1 | | PCIEB | |
+ * |------------------------------------|
+ * | 2 | PCIEA | PCIEA | |
+ * |------------------------------------|
+ * | 3 | | | PCIEB/SATA |
+ * +------------------------------------+
+ */
+enum phy_mode_index {
+ IMX8Q_HSIO_LANE0_PCIE_PHY,
+ IMX8Q_HSIO_LANE1_PCIE_PHY,
+ IMX8Q_HSIO_LANE0_1_PCIE_PHY,
+ IMX8Q_HSIO_LANE2_PHY
+};
+
+struct imx_hsio_drvdata {
+ int phy_mix_num;
+};
+
+struct imx_hsio_phy_lane {
+ const char * const *clk_names;
+ struct clk_bulk_data clks[LANE_NUM_CLKS];
+};
+
+struct imx_hsio_phy_mix {
+ u32 ctrl_index;
+ u32 ctrl_off;
+ u32 phy_off;
+ u32 phy_type;
+ struct imx_hsio_phy_lane lane[PHY_MIX_MAX_NUM_LANES];
+ struct imx_hsio_priv *priv;
+ struct phy *phy;
+ enum phy_mode pmix_mode;
+ enum phy_mode_index idx;
+};
+
+struct imx_hsio_priv {
+ void __iomem *base;
+ struct device *dev;
+ u32 refclk_pad;
+ u32 hsio_cfg;
+ struct regmap *phy;
+ struct regmap *ctrl;
+ struct regmap *misc;
+ const struct imx_hsio_drvdata *drvdata;
+ struct imx_hsio_phy_mix pmix[MAX_NUM_PHY_MIXS];
+};
+
+static const char * const lan0_pcie_clks[] = {"apb_pclk0", "pclk0", "ctl0_crr",
+ "phy0_crr", "misc_crr"};
+static const char * const lan1_pciea_clks[] = {"apb_pclk1", "pclk1", "ctl0_crr",
+ "phy0_crr", "misc_crr"};
+static const char * const lan1_pcieb_clks[] = {"apb_pclk1", "pclk1", "ctl1_crr",
+ "phy0_crr", "misc_crr"};
+static const char * const lan2_pcieb_clks[] = {"apb_pclk2", "pclk2", "ctl1_crr",
+ "phy1_crr", "misc_crr"};
+static const char * const lan2_sata_clks[] = {"pclk2", "epcs_tx", "epcs_rx",
+ "phy1_crr", "misc_crr"};
+
+static const struct regmap_config regmap_config = {
+ .reg_bits = 32,
+ .val_bits = 32,
+ .reg_stride = 4,
+};
+
+static int imx_hsio_get_idx(int phy_type, int ctrl_index, int lane_mask)
+{
+ int index;
+
+ switch (phy_type) {
+ case PHY_TYPE_PCIE:
+ if (ctrl_index) { /* PCIEB */
+ if (lane_mask == IMX8Q_HSIO_LANE0) /* i.MX8QXP */
+ index = IMX8Q_HSIO_LANE0_PCIE_PHY;
+ else if (lane_mask == IMX8Q_HSIO_LANE1) /* i.MX8QM */
+ index = IMX8Q_HSIO_LANE1_PCIE_PHY;
+ else if (lane_mask == IMX8Q_HSIO_LANE2) /* i.MX8QM */
+ index = IMX8Q_HSIO_LANE2_PHY;
+ else
+ return -EINVAL;
+ } else { /* PCIEA */
+ if (lane_mask == (IMX8Q_HSIO_LANE0 | IMX8Q_HSIO_LANE1))
+ index = IMX8Q_HSIO_LANE0_1_PCIE_PHY;
+ else if (lane_mask == IMX8Q_HSIO_LANE0)
+ index = IMX8Q_HSIO_LANE0_PCIE_PHY;
+ else
+ return -EINVAL;
+ }
+ break;
+ case PHY_TYPE_SATA:
+ index = IMX8Q_HSIO_LANE2_PHY;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return index;
+}
+
+static int imx_hsio_init(struct phy *phy)
+{
+ int ret, i;
+ struct imx_hsio_phy_mix *pmix = phy_get_drvdata(phy);
+ struct imx_hsio_priv *priv = pmix->priv;
+ struct device *dev = priv->dev;
+
+ /* Assign clocks refer to different modes */
+ switch (pmix->phy_type) {
+ case PHY_TYPE_PCIE:
+ if (pmix->ctrl_index == 0) { /* PCIEA */
+ pmix->pmix_mode = PHY_MODE_PCIE;
+ pmix->ctrl_off = 0;
+ pmix->phy_off = 0;
+
+ for (i = 0; i < LANE_NUM_CLKS; i++) {
+ if (pmix->idx == IMX8Q_HSIO_LANE0_PCIE_PHY) {
+ pmix->lane[0].clks[i].id = lan0_pcie_clks[i];
+ } else { /* 2 lanes are bound to PCIEA */
+ pmix->lane[0].clks[i].id = lan0_pcie_clks[i];
+ pmix->lane[1].clks[i].id = lan1_pciea_clks[i];
+ }
+ }
+ } else { /* PCIEB */
+ pmix->pmix_mode = PHY_MODE_PCIE;
+ if (pmix->idx == IMX8Q_HSIO_LANE0_PCIE_PHY) {
+ /* i.MX8QXP */
+ pmix->ctrl_off = 0;
+ pmix->phy_off = 0;
+ } else {
+ /*
+ * On i.MX8QM, only second or third lane can be
+ * bound to PCIEB.
+ */
+ pmix->ctrl_off = SZ_64K;
+ if (pmix->idx == IMX8Q_HSIO_LANE1_PCIE_PHY)
+ pmix->phy_off = 0;
+ else /* the third lane is bound to PCIEB */
+ pmix->phy_off = SZ_64K;
+ }
+
+ for (i = 0; i < LANE_NUM_CLKS; i++) {
+ if (pmix->idx == IMX8Q_HSIO_LANE1_PCIE_PHY)
+ pmix->lane[0].clks[i].id = lan1_pcieb_clks[i];
+ else if (pmix->idx == IMX8Q_HSIO_LANE2_PHY)
+ pmix->lane[0].clks[i].id = lan2_pcieb_clks[i];
+ else /* i.MX8QXP only has PCIEB, idx is 0 */
+ pmix->lane[0].clks[i].id = lan0_pcie_clks[i];
+ }
+ }
+ break;
+ case PHY_TYPE_SATA:
+ /* On i.MX8QM, only the third lane can be bound to SATA */
+ pmix->ctrl_off = SZ_128K;
+ pmix->pmix_mode = PHY_MODE_SATA;
+ pmix->phy_off = SZ_64K;
+
+ for (i = 0; i < LANE_NUM_CLKS; i++)
+ pmix->lane[0].clks[i].id = lan2_sata_clks[i];
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ /* Fetch clocks and enable them */
+ ret = devm_clk_bulk_get(dev, LANE_NUM_CLKS, pmix->lane[0].clks);
+ if (ret)
+ return ret;
+ if (pmix->idx == IMX8Q_HSIO_LANE0_1_PCIE_PHY) {
+ ret = devm_clk_bulk_get(dev, LANE_NUM_CLKS, pmix->lane[1].clks);
+ if (ret)
+ return ret;
+ }
+ ret = clk_bulk_prepare_enable(LANE_NUM_CLKS, pmix->lane[0].clks);
+ if (ret)
+ return ret;
+ if (pmix->idx == IMX8Q_HSIO_LANE0_1_PCIE_PHY) {
+ /* Enable the second lane's clocks */
+ ret = clk_bulk_prepare_enable(LANE_NUM_CLKS,
+ pmix->lane[1].clks);
+ if (ret) {
+ clk_bulk_disable_unprepare(LANE_NUM_CLKS,
+ pmix->lane[0].clks);
+ return ret;
+ }
+ }
+
+ /* allow the clocks to stabilize */
+ usleep_range(200, 500);
+ return 0;
+}
+
+static int imx_hsio_exit(struct phy *phy)
+{
+ struct imx_hsio_phy_mix *pmix = phy_get_drvdata(phy);
+
+ clk_bulk_disable_unprepare(LANE_NUM_CLKS, pmix->lane[0].clks);
+ if (pmix->idx == IMX8Q_HSIO_LANE0_1_PCIE_PHY)
+ /* Disable the clocks used by sencond lane of the PHY */
+ clk_bulk_disable_unprepare(LANE_NUM_CLKS, pmix->lane[1].clks);
+
+ return 0;
+}
+
+static void imx_hsio_pcie_phy_resets(struct phy *phy)
+{
+ struct imx_hsio_phy_mix *pmix = phy_get_drvdata(phy);
+ struct imx_hsio_priv *priv = pmix->priv;
+
+ regmap_clear_bits(priv->ctrl, pmix->ctrl_off + HSIO_CTRL2,
+ HSIO_BUTTON_RST_N);
+ regmap_clear_bits(priv->ctrl, pmix->ctrl_off + HSIO_CTRL2,
+ HSIO_PERST_N);
+ regmap_clear_bits(priv->ctrl, pmix->ctrl_off + HSIO_CTRL2,
+ HSIO_POWER_UP_RST_N);
+ regmap_set_bits(priv->ctrl, pmix->ctrl_off + HSIO_CTRL2,
+ HSIO_BUTTON_RST_N);
+ regmap_set_bits(priv->ctrl, pmix->ctrl_off + HSIO_CTRL2,
+ HSIO_PERST_N);
+ regmap_set_bits(priv->ctrl, pmix->ctrl_off + HSIO_CTRL2,
+ HSIO_POWER_UP_RST_N);
+
+ if (pmix->idx == IMX8Q_HSIO_LANE0_1_PCIE_PHY) {
+ regmap_set_bits(priv->phy, pmix->phy_off + HSIO_CTRL0,
+ HSIO_APB_RSTN_0);
+ regmap_set_bits(priv->phy, pmix->phy_off + HSIO_CTRL0,
+ HSIO_PIPE_RSTN_0_MASK);
+ regmap_set_bits(priv->phy, pmix->phy_off + HSIO_CTRL0,
+ HSIO_APB_RSTN_1);
+ regmap_set_bits(priv->phy, pmix->phy_off + HSIO_CTRL0,
+ HSIO_PIPE_RSTN_1_MASK);
+ } else if (pmix->idx == IMX8Q_HSIO_LANE1_PCIE_PHY) {
+ /* The second pmix */
+ regmap_set_bits(priv->phy, pmix->phy_off + HSIO_CTRL0,
+ HSIO_APB_RSTN_1);
+ regmap_set_bits(priv->phy, pmix->phy_off + HSIO_CTRL0,
+ HSIO_PIPE_RSTN_1_MASK);
+ } else {
+ regmap_set_bits(priv->phy, pmix->phy_off + HSIO_CTRL0,
+ HSIO_APB_RSTN_0);
+ regmap_set_bits(priv->phy, pmix->phy_off + HSIO_CTRL0,
+ HSIO_PIPE_RSTN_0_MASK);
+ }
+}
+
+static void imx_hsio_sata_phy_resets(struct phy *phy)
+{
+ struct imx_hsio_phy_mix *pmix = phy_get_drvdata(phy);
+ struct imx_hsio_priv *priv = pmix->priv;
+
+ /* clear PHY RST, then set it */
+ regmap_clear_bits(priv->ctrl, pmix->ctrl_off + HSIO_CTRL0,
+ HSIO_EPCS_PHYRESET_N);
+ regmap_set_bits(priv->ctrl, pmix->ctrl_off + HSIO_CTRL0,
+ HSIO_EPCS_PHYRESET_N);
+
+ /* CTRL RST: SET -> delay 1 us -> CLEAR -> SET */
+ regmap_set_bits(priv->ctrl, pmix->ctrl_off + HSIO_CTRL0, HSIO_RESET_N);
+ udelay(1);
+ regmap_clear_bits(priv->ctrl, pmix->ctrl_off + HSIO_CTRL0,
+ HSIO_RESET_N);
+ regmap_set_bits(priv->ctrl, pmix->ctrl_off + HSIO_CTRL0, HSIO_RESET_N);
+}
+
+static void imx_hsio_configure_clk_pad(struct phy *phy)
+{
+ bool pll = false;
+ u32 pad_mode;
+ struct imx_hsio_phy_mix *pmix = phy_get_drvdata(phy);
+ struct imx_hsio_priv *priv = pmix->priv;
+
+ pad_mode = priv->refclk_pad;
+ if (pad_mode == IMX8_PCIE_REFCLK_PAD_OUTPUT) {
+ pll = true;
+ regmap_update_bits(priv->misc, HSIO_CTRL0,
+ HSIO_IOB_A_0_TXOE | HSIO_IOB_A_0_M1M0_MASK,
+ HSIO_IOB_A_0_TXOE | HSIO_IOB_A_0_M1M0_2);
+ }
+
+ regmap_update_bits(priv->misc, HSIO_CTRL0, HSIO_IOB_RXENA,
+ pll ? 0 : HSIO_IOB_RXENA);
+ regmap_update_bits(priv->misc, HSIO_CTRL0, HSIO_IOB_TXENA,
+ pll ? HSIO_IOB_TXENA : 0);
+}
+
+static int imx_hsio_power_on(struct phy *phy)
+{
+ int ret;
+ u32 val, addr, cond;
+ struct imx_hsio_phy_mix *pmix = phy_get_drvdata(phy);
+ struct imx_hsio_priv *priv = pmix->priv;
+
+ if (pmix->pmix_mode == PHY_MODE_PCIE)
+ imx_hsio_pcie_phy_resets(phy);
+ else /* SATA */
+ regmap_set_bits(priv->phy, pmix->phy_off + HSIO_CTRL0,
+ HSIO_APB_RSTN_0);
+
+ if (priv->hsio_cfg & IMX8Q_HSIO_CFG_PCIEAX2PCIEB)
+ regmap_set_bits(priv->misc, HSIO_CTRL0, HSIO_PCIE_AB_SELECT);
+ if (priv->hsio_cfg & IMX8Q_HSIO_CFG_PCIEAX2SATA)
+ regmap_set_bits(priv->misc, HSIO_CTRL0, HSIO_PHYX1_EPCS_SEL);
+
+ imx_hsio_configure_clk_pad(phy);
+
+ if (pmix->pmix_mode == PHY_MODE_SATA) {
+ regmap_set_bits(priv->ctrl, pmix->ctrl_off + HSIO_CTRL0,
+ HSIO_EPCS_TXDEEMP);
+ regmap_set_bits(priv->ctrl, pmix->ctrl_off + HSIO_CTRL0,
+ HSIO_EPCS_TXDEEMP_SEL);
+
+ imx_hsio_sata_phy_resets(phy);
+ } else {
+ /* Toggle apb_pclk to make sure PM_REQ_CORE_RST is cleared. */
+ clk_disable_unprepare(pmix->lane[0].clks[0].clk);
+ mdelay(1);
+ ret = clk_prepare_enable(pmix->lane[0].clks[0].clk);
+ if (ret) {
+ dev_err(priv->dev, "unable to enable phy apb_pclk\n");
+ return ret;
+ }
+
+ addr = pmix->ctrl_off + HSIO_PCIE_STS0;
+ cond = HSIO_PM_REQ_CORE_RST;
+ ret = regmap_read_poll_timeout(priv->ctrl, addr, val,
+ (val & cond) == 0,
+ PHY_INIT_WAIT_USLEEP_MAX,
+ PHY_INIT_WAIT_TIMEOUT);
+ if (ret) {
+ dev_err(priv->dev, "HSIO_PM_REQ_CORE_RST is set\n");
+ return ret;
+ }
+ }
+
+ /* Polling to check the PHY is ready or not. */
+ if (pmix->idx == IMX8Q_HSIO_LANE1_PCIE_PHY)
+ cond = HSIO_LANE1_TX_PLL_LOCK;
+ else
+ cond = HSIO_LANE0_TX_PLL_LOCK;
+
+ ret = regmap_read_poll_timeout(priv->phy, pmix->phy_off + HSIO_PHY_STS0,
+ val, ((val & cond) == cond),
+ PHY_INIT_WAIT_USLEEP_MAX,
+ PHY_INIT_WAIT_TIMEOUT);
+ if (ret) {
+ dev_err(priv->dev, "IMX8Q PHY%d PLL lock timeout\n", pmix->idx);
+ return ret;
+ }
+ dev_info(priv->dev, "IMX8Q PHY%d PLL is locked\n", pmix->idx);
+
+ if (pmix->pmix_mode == PHY_MODE_SATA) {
+ cond = HSIO_REG48_PMA_RDY;
+ ret = read_poll_timeout(readb, val, ((val & cond) == cond),
+ PHY_INIT_WAIT_USLEEP_MAX,
+ PHY_INIT_WAIT_TIMEOUT, false,
+ priv->base + HSIO_REG48_PMA_STATUS);
+ if (ret)
+ dev_err(priv->dev, "PHY calibration is timeout\n");
+ else
+ dev_info(priv->dev, "PHY calibration is done\n");
+ }
+
+ return ret;
+}
+
+static int imx_hsio_set_mode(struct phy *phy, enum phy_mode mode,
+ int submode)
+{
+ u32 val;
+ struct imx_hsio_phy_mix *pmix = phy_get_drvdata(phy);
+ struct imx_hsio_priv *priv = pmix->priv;
+
+ if (pmix->pmix_mode != mode)
+ return -EINVAL;
+
+ val = (mode == PHY_MODE_PCIE) ? HSIO_MODE_PCIE : HSIO_MODE_SATA;
+ val = FIELD_PREP(HSIO_MODE_MASK, val);
+ regmap_update_bits(priv->phy, pmix->phy_off + HSIO_CTRL0,
+ HSIO_MODE_MASK, val);
+
+ switch (submode) {
+ case PHY_MODE_PCIE_RC:
+ val = FIELD_PREP(HSIO_DEVICE_TYPE_MASK, PCI_EXP_TYPE_ROOT_PORT);
+ break;
+ case PHY_MODE_PCIE_EP:
+ val = FIELD_PREP(HSIO_DEVICE_TYPE_MASK, PCI_EXP_TYPE_ENDPOINT);
+ break;
+ default: /* Support only PCIe EP and RC now. */
+ return 0;
+ }
+ if (submode)
+ regmap_update_bits(priv->ctrl, pmix->ctrl_off + HSIO_CTRL0,
+ HSIO_DEVICE_TYPE_MASK, val);
+
+ return 0;
+}
+
+static int imx_hsio_set_speed(struct phy *phy, int speed)
+{
+ struct imx_hsio_phy_mix *pmix = phy_get_drvdata(phy);
+ struct imx_hsio_priv *priv = pmix->priv;
+
+ regmap_update_bits(priv->ctrl, pmix->ctrl_off + HSIO_CTRL2,
+ HSIO_LTSSM_ENABLE,
+ speed ? HSIO_LTSSM_ENABLE : 0);
+ return 0;
+}
+
+static const struct phy_ops imx_hsio_ops = {
+ .init = imx_hsio_init,
+ .exit = imx_hsio_exit,
+ .power_on = imx_hsio_power_on,
+ .set_mode = imx_hsio_set_mode,
+ .set_speed = imx_hsio_set_speed,
+ .owner = THIS_MODULE,
+};
+
+static const struct imx_hsio_drvdata imx8qxp_hsio_drvdata = {
+ .phy_mix_num = 0x1,
+};
+
+static const struct imx_hsio_drvdata imx_hsio_drvdata = {
+ .phy_mix_num = 0x4,
+};
+
+static const struct of_device_id imx_hsio_of_match[] = {
+ {.compatible = "fsl,imx8qm-hsio", .data = &imx_hsio_drvdata},
+ {.compatible = "fsl,imx8qxp-hsio", .data = &imx8qxp_hsio_drvdata},
+ { },
+};
+MODULE_DEVICE_TABLE(of, imx_hsio_of_match);
+
+static struct phy *imx_hsio_xlate(struct device *dev,
+ const struct of_phandle_args *args)
+{
+ struct imx_hsio_priv *priv = dev_get_drvdata(dev);
+ int phy_type = args->args[0];
+ int ctrl_index = args->args[1];
+ int idx, lane_mask = args->args[2];
+
+ idx = imx_hsio_get_idx(phy_type, ctrl_index, lane_mask);
+ if (idx < 0 || idx >= priv->drvdata->phy_mix_num)
+ return ERR_PTR(-EINVAL);
+ priv->pmix[idx].phy_type = phy_type;
+ priv->pmix[idx].ctrl_index = ctrl_index;
+ priv->pmix[idx].idx = idx;
+
+ return priv->pmix[idx].phy;
+}
+
+static int imx_hsio_probe(struct platform_device *pdev)
+{
+ int i;
+ void __iomem *off;
+ struct device *dev = &pdev->dev;
+ struct device_node *np = dev->of_node;
+ const struct of_device_id *of_id;
+ struct imx_hsio_priv *priv;
+ struct phy_provider *provider;
+
+ of_id = of_match_device(imx_hsio_of_match, dev);
+ if (!of_id)
+ return -EINVAL;
+
+ priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+ priv->dev = &pdev->dev;
+ priv->drvdata = of_device_get_match_data(dev);
+
+ /* Get HSIO configuration mode */
+ of_property_read_u32(np, "fsl,hsio-cfg", &priv->hsio_cfg);
+ /* Get PHY refclk pad mode */
+ if (of_property_read_u32(np, "fsl,refclk-pad-mode", &priv->refclk_pad))
+ priv->refclk_pad = IMX8_PCIE_REFCLK_PAD_OUTPUT;
+
+ priv->base = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(priv->base))
+ return PTR_ERR(priv->base);
+
+ off = devm_platform_ioremap_resource_byname(pdev, "phy");
+ priv->phy = devm_regmap_init_mmio(dev, off, ®map_config);
+ if (IS_ERR(priv->phy))
+ return dev_err_probe(dev, PTR_ERR(priv->phy),
+ "unable to find phy csr registers\n");
+
+ off = devm_platform_ioremap_resource_byname(pdev, "ctrl");
+ priv->ctrl = devm_regmap_init_mmio(dev, off, ®map_config);
+ if (IS_ERR(priv->ctrl))
+ return dev_err_probe(dev, PTR_ERR(priv->ctrl),
+ "unable to find ctrl csr registers\n");
+
+ off = devm_platform_ioremap_resource_byname(pdev, "misc");
+ priv->misc = devm_regmap_init_mmio(dev, off, ®map_config);
+ if (IS_ERR(priv->misc))
+ return dev_err_probe(dev, PTR_ERR(priv->misc),
+ "unable to find misc csr registers\n");
+
+ for (i = 0; i < priv->drvdata->phy_mix_num; i++) {
+ struct imx_hsio_phy_mix *pmix = &priv->pmix[i];
+ struct phy *phy;
+
+ memset(pmix, 0, sizeof(*pmix));
+
+ phy = devm_phy_create(&pdev->dev, NULL, &imx_hsio_ops);
+ if (IS_ERR(phy))
+ return PTR_ERR(phy);
+
+ pmix->priv = priv;
+ pmix->phy = phy;
+ pmix->idx = i;
+ phy_set_drvdata(phy, pmix);
+ }
+
+ dev_set_drvdata(dev, priv);
+ dev_set_drvdata(&pdev->dev, priv);
+
+ provider = devm_of_phy_provider_register(&pdev->dev, imx_hsio_xlate);
+
+ return PTR_ERR_OR_ZERO(provider);
+}
+
+static struct platform_driver imx_hsio_driver = {
+ .probe = imx_hsio_probe,
+ .driver = {
+ .name = "imx8qm-hsio-phy",
+ .of_match_table = imx_hsio_of_match,
+ }
+};
+module_platform_driver(imx_hsio_driver);
+
+MODULE_DESCRIPTION("FSL IMX8QM HSIO SERDES PHY driver");
+MODULE_LICENSE("GPL");
--
2.37.1
More information about the linux-arm-kernel
mailing list