Message-ID: <bf372f2d-4ac1-47f4-1ce5-ffebb71108f6@ti.com>
Date:   Tue, 19 May 2020 20:25:52 +0530
From:   Kishon Vijay Abraham I <kishon@...com>
To:     Dilip Kota <eswara.kota@...ux.intel.com>,
        <linux-kernel@...r.kernel.org>, <vkoul@...nel.org>,
        <devicetree@...r.kernel.org>
CC:     <robh@...nel.org>, <andriy.shevchenko@...el.com>,
        <cheol.yong.kim@...el.com>, <chuanhua.lei@...ux.intel.com>,
        <qi-ming.wu@...el.com>, <yixin.zhu@...el.com>
Subject: Re: [PATCH v9 3/3] phy: intel: Add driver support for ComboPhy

Hi Dilip,

On 5/19/2020 11:49 AM, Dilip Kota wrote:
> ComboPhy subsystem provides PHYs for various
> controllers like PCIe, SATA and EMAC.
> 
> Signed-off-by: Dilip Kota <eswara.kota@...ux.intel.com>
> ---
> Changes on v9:
>   Add Acked-By: Vinod Koul <vkoul@...nel.org>

I added Acked-By myself and merged this patch.

Thanks
Kishon
> 
> Fix compiler warning
> drivers/phy/intel/phy-intel-combo.c:229:6: warning: cb_mode may be used
> uninitialized in this function [-Wmaybe-uninitialized]
>    ret = regmap_write(cbphy->hsiocfg, REG_COMBO_MODE(cbphy->bid), cb_mode);
>    ~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> drivers/phy/intel/phy-intel-combo.c:204:24: note: cb_mode was declared here
>    enum intel_combo_mode cb_mode;
>    
> Changes on v8:
>   As per PHY Maintainer's request add description for doing register access
>   through regmap in comments.
> 
> Changes on v7:
>   Use device_node_to_regmap instead of fwnode_to_regmap
>   
> Changes on v6:
>   No changes
> 
> Changes on v5:
>  Add changes as per inputs from Andy and Rob:
>     DT node uses phy-mode values as defined in "include/dt-bindings/phy/phy.h",
>      add changes to handle it.
>     ComboPhy no longer has children nodes, and children node properties(reset)
>      moved to parent node, so do the code changes accordingly.
>     Add _xlate() function to pass the appropriate phy handle.
>     Fix couple of nitpicks.
> 
> Changes on v4:
>  Address review comments
>    Remove dependency on OF config
>    Update copyright to 2019-2020
>    Define register macro PAD_DIS_CFG instead of const variable inside function.
>    Improve the error prints, and error returns.
>    Call put_device(dev), for get_dev_from_fwnode()
>    Move platform_set_drvdata() at the end of the probe().
>    Correct alignment in phy_ops intel_cbphy_ops.
>    Correct commented lines with proper vocabulary and punctuation.
>    Add/remove commas for the required constant arrays and enums.
>    Remove in driver:
>      linux/kernel.h, not required
>      macros: PCIE_PHY_MPLLA_CTRL, PCIE_PHY_MPLLB_CTRL
>      temp variable u32 prop;
>    Change function names:
>      intel_cbphy_iphy_dt_parse() -> intel_cbphy_iphy_fwnode_parse()
>      intel_cbphy_dt_sanity_check() -> intel_cbphy_sanity_check()
>      intel_cbphy_dt_parse() -> intel_cbphy_fwnode_parse()
> 
> Changes on v3:
>  Remove intel_iphy_names
>  Remove struct phy in struct intel_cbphy_iphy
>  Imporve if conditions logic
>  Use fwnode_to_regmap()
>  Call devm_of_platform_populate() to populate child nodes
>  Fix reset sequence during phy_init
>  Add SoC specific compatible "intel,combophy-lgm"
>  Add description for enums
>  Remove default case in switch {} intel_cbphy_set_mode() as it
>   never happens.
>  Use mutex_lock to synchronise combophy initialization across
>   two phys.
>  Change init_cnt to u32 datatype as it is within mutex lock.
>  Correct error handling of
>   fwnode_property_read_u32_array(fwnode, "intel,phy-mode", ...)
> 
>  drivers/phy/intel/Kconfig           |  14 +
>  drivers/phy/intel/Makefile          |   1 +
>  drivers/phy/intel/phy-intel-combo.c | 632 ++++++++++++++++++++++++++++++++++++
>  3 files changed, 647 insertions(+)
>  create mode 100644 drivers/phy/intel/phy-intel-combo.c
> 
> diff --git a/drivers/phy/intel/Kconfig b/drivers/phy/intel/Kconfig
> index 4ea6a8897cd7..3b40eb7b4fb4 100644
> --- a/drivers/phy/intel/Kconfig
> +++ b/drivers/phy/intel/Kconfig
> @@ -2,6 +2,20 @@
>  #
>  # Phy drivers for Intel Lightning Mountain(LGM) platform
>  #
> +config PHY_INTEL_COMBO
> +	bool "Intel ComboPHY driver"
> +	depends on X86 || COMPILE_TEST
> +	depends on OF && HAS_IOMEM
> +	select MFD_SYSCON
> +	select GENERIC_PHY
> +	select REGMAP
> +	help
> +	  Enable this to support Intel ComboPhy.
> +
> +	  This driver configures ComboPhy subsystem on Intel gateway
> +	  chipsets which provides PHYs for various controllers, EMAC,
> +	  SATA and PCIe.
> +
>  config PHY_INTEL_EMMC
>  	tristate "Intel EMMC PHY driver"
>  	select GENERIC_PHY
> diff --git a/drivers/phy/intel/Makefile b/drivers/phy/intel/Makefile
> index 6b876a75599d..233d530dadde 100644
> --- a/drivers/phy/intel/Makefile
> +++ b/drivers/phy/intel/Makefile
> @@ -1,2 +1,3 @@
>  # SPDX-License-Identifier: GPL-2.0
> +obj-$(CONFIG_PHY_INTEL_COMBO)		+= phy-intel-combo.o
>  obj-$(CONFIG_PHY_INTEL_EMMC)            += phy-intel-emmc.o
> diff --git a/drivers/phy/intel/phy-intel-combo.c b/drivers/phy/intel/phy-intel-combo.c
> new file mode 100644
> index 000000000000..c2a35be4cdfb
> --- /dev/null
> +++ b/drivers/phy/intel/phy-intel-combo.c
> @@ -0,0 +1,632 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Intel Combo-PHY driver
> + *
> + * Copyright (C) 2019-2020 Intel Corporation.
> + */
> +
> +#include <linux/bitfield.h>
> +#include <linux/clk.h>
> +#include <linux/iopoll.h>
> +#include <linux/mfd/syscon.h>
> +#include <linux/module.h>
> +#include <linux/mutex.h>
> +#include <linux/of.h>
> +#include <linux/phy/phy.h>
> +#include <linux/platform_device.h>
> +#include <linux/regmap.h>
> +#include <linux/reset.h>
> +
> +#include <dt-bindings/phy/phy.h>
> +
> +#define PCIE_PHY_GEN_CTRL	0x00
> +#define PCIE_PHY_CLK_PAD	BIT(17)
> +
> +#define PAD_DIS_CFG		0x174
> +
> +#define PCS_XF_ATE_OVRD_IN_2	0x3008
> +#define ADAPT_REQ_MSK		GENMASK(5, 4)
> +
> +#define PCS_XF_RX_ADAPT_ACK	0x3010
> +#define RX_ADAPT_ACK_BIT	BIT(0)
> +
> +#define CR_ADDR(addr, lane)	(((addr) + (lane) * 0x100) << 2)
> +#define REG_COMBO_MODE(x)	((x) * 0x200)
> +#define REG_CLK_DISABLE(x)	((x) * 0x200 + 0x124)
> +
> +#define COMBO_PHY_ID(x)		((x)->parent->id)
> +#define PHY_ID(x)		((x)->id)
> +
> +#define CLK_100MHZ		100000000
> +#define CLK_156_25MHZ		156250000
> +
> +static const unsigned long intel_iphy_clk_rates[] = {
> +	CLK_100MHZ, CLK_156_25MHZ, CLK_100MHZ,
> +};
> +
> +enum {
> +	PHY_0,
> +	PHY_1,
> +	PHY_MAX_NUM
> +};
> +
> +/*
> + * Clock Register bit fields to enable clocks
> + * for ComboPhy according to the mode.
> + */
> +enum intel_phy_mode {
> +	PHY_PCIE_MODE = 0,
> +	PHY_XPCS_MODE,
> +	PHY_SATA_MODE,
> +};
> +
> +/* ComboPhy mode Register values */
> +enum intel_combo_mode {
> +	PCIE0_PCIE1_MODE = 0,
> +	PCIE_DL_MODE,
> +	RXAUI_MODE,
> +	XPCS0_XPCS1_MODE,
> +	SATA0_SATA1_MODE,
> +};
> +
> +enum aggregated_mode {
> +	PHY_SL_MODE,
> +	PHY_DL_MODE,
> +};
> +
> +struct intel_combo_phy;
> +
> +struct intel_cbphy_iphy {
> +	struct phy		*phy;
> +	struct intel_combo_phy	*parent;
> +	struct reset_control	*app_rst;
> +	u32			id;
> +};
> +
> +struct intel_combo_phy {
> +	struct device		*dev;
> +	struct clk		*core_clk;
> +	unsigned long		clk_rate;
> +	void __iomem		*app_base;
> +	void __iomem		*cr_base;
> +	struct regmap		*syscfg;
> +	struct regmap		*hsiocfg;
> +	u32			id;
> +	u32			bid;
> +	struct reset_control	*phy_rst;
> +	struct reset_control	*core_rst;
> +	struct intel_cbphy_iphy	iphy[PHY_MAX_NUM];
> +	enum intel_phy_mode	phy_mode;
> +	enum aggregated_mode	aggr_mode;
> +	u32			init_cnt;
> +	struct mutex		lock;
> +};
> +
> +static int intel_cbphy_iphy_enable(struct intel_cbphy_iphy *iphy, bool set)
> +{
> +	struct intel_combo_phy *cbphy = iphy->parent;
> +	u32 mask = BIT(cbphy->phy_mode * 2 + iphy->id);
> +	u32 val;
> +
> +	/* Register: 0 is enable, 1 is disable */
> +	val = set ? 0 : mask;
> +
> +	return regmap_update_bits(cbphy->hsiocfg, REG_CLK_DISABLE(cbphy->bid),
> +				  mask, val);
> +}
> +
> +static int intel_cbphy_pcie_refclk_cfg(struct intel_cbphy_iphy *iphy, bool set)
> +{
> +	struct intel_combo_phy *cbphy = iphy->parent;
> +	u32 mask = BIT(cbphy->id * 2 + iphy->id);
> +	u32 val;
> +
> +	/* Register: 0 is enable, 1 is disable */
> +	val = set ? 0 : mask;
> +
> +	return regmap_update_bits(cbphy->syscfg, PAD_DIS_CFG, mask, val);
> +}
> +
> +static inline void combo_phy_w32_off_mask(void __iomem *base, unsigned int reg,
> +					  u32 mask, u32 val)
> +{
> +	u32 reg_val;
> +
> +	reg_val = readl(base + reg);
> +	reg_val &= ~mask;
> +	reg_val |= FIELD_PREP(mask, val);
> +	writel(reg_val, base + reg);
> +}
> +
> +static int intel_cbphy_iphy_cfg(struct intel_cbphy_iphy *iphy,
> +				int (*phy_cfg)(struct intel_cbphy_iphy *))
> +{
> +	struct intel_combo_phy *cbphy = iphy->parent;
> +	int ret;
> +
> +	ret = phy_cfg(iphy);
> +	if (ret)
> +		return ret;
> +
> +	if (cbphy->aggr_mode != PHY_DL_MODE)
> +		return 0;
> +
> +	return phy_cfg(&cbphy->iphy[PHY_1]);
> +}
> +
> +static int intel_cbphy_pcie_en_pad_refclk(struct intel_cbphy_iphy *iphy)
> +{
> +	struct intel_combo_phy *cbphy = iphy->parent;
> +	int ret;
> +
> +	ret = intel_cbphy_pcie_refclk_cfg(iphy, true);
> +	if (ret) {
> +		dev_err(cbphy->dev, "Failed to enable PCIe pad refclk\n");
> +		return ret;
> +	}
> +
> +	if (cbphy->init_cnt)
> +		return 0;
> +
> +	combo_phy_w32_off_mask(cbphy->app_base, PCIE_PHY_GEN_CTRL,
> +			       PCIE_PHY_CLK_PAD, 0);
> +
> +	/* Delay for stable clock PLL */
> +	usleep_range(50, 100);
> +
> +	return 0;
> +}
> +
> +static int intel_cbphy_pcie_dis_pad_refclk(struct intel_cbphy_iphy *iphy)
> +{
> +	struct intel_combo_phy *cbphy = iphy->parent;
> +	int ret;
> +
> +	ret = intel_cbphy_pcie_refclk_cfg(iphy, false);
> +	if (ret) {
> +		dev_err(cbphy->dev, "Failed to disable PCIe pad refclk\n");
> +		return ret;
> +	}
> +
> +	if (cbphy->init_cnt)
> +		return 0;
> +
> +	combo_phy_w32_off_mask(cbphy->app_base, PCIE_PHY_GEN_CTRL,
> +			       PCIE_PHY_CLK_PAD, 1);
> +
> +	return 0;
> +}
> +
> +static int intel_cbphy_set_mode(struct intel_combo_phy *cbphy)
> +{
> +	enum intel_combo_mode cb_mode = PHY_PCIE_MODE;
> +	enum aggregated_mode aggr = cbphy->aggr_mode;
> +	struct device *dev = cbphy->dev;
> +	enum intel_phy_mode mode;
> +	int ret;
> +
> +	mode = cbphy->phy_mode;
> +
> +	switch (mode) {
> +	case PHY_PCIE_MODE:
> +		cb_mode = (aggr == PHY_DL_MODE) ? PCIE_DL_MODE : PCIE0_PCIE1_MODE;
> +		break;
> +
> +	case PHY_XPCS_MODE:
> +		cb_mode = (aggr == PHY_DL_MODE) ? RXAUI_MODE : XPCS0_XPCS1_MODE;
> +		break;
> +
> +	case PHY_SATA_MODE:
> +		if (aggr == PHY_DL_MODE) {
> +			dev_err(dev, "Mode:%u not support dual lane!\n", mode);
> +			return -EINVAL;
> +		}
> +
> +		cb_mode = SATA0_SATA1_MODE;
> +		break;
> +	}
> +
> +	ret = regmap_write(cbphy->hsiocfg, REG_COMBO_MODE(cbphy->bid), cb_mode);
> +	if (ret)
> +		dev_err(dev, "Failed to set ComboPhy mode: %d\n", ret);
> +
> +	return ret;
> +}
> +
> +static void intel_cbphy_rst_assert(struct intel_combo_phy *cbphy)
> +{
> +	reset_control_assert(cbphy->core_rst);
> +	reset_control_assert(cbphy->phy_rst);
> +}
> +
> +static void intel_cbphy_rst_deassert(struct intel_combo_phy *cbphy)
> +{
> +	reset_control_deassert(cbphy->core_rst);
> +	reset_control_deassert(cbphy->phy_rst);
> +	/* Delay to ensure reset process is done */
> +	usleep_range(10, 20);
> +}
> +
> +static int intel_cbphy_iphy_power_on(struct intel_cbphy_iphy *iphy)
> +{
> +	struct intel_combo_phy *cbphy = iphy->parent;
> +	int ret;
> +
> +	if (!cbphy->init_cnt) {
> +		ret = clk_prepare_enable(cbphy->core_clk);
> +		if (ret) {
> +			dev_err(cbphy->dev, "Clock enable failed!\n");
> +			return ret;
> +		}
> +
> +		ret = clk_set_rate(cbphy->core_clk, cbphy->clk_rate);
> +		if (ret) {
> +			dev_err(cbphy->dev, "Clock freq set to %lu failed!\n",
> +				cbphy->clk_rate);
> +			goto clk_err;
> +		}
> +
> +		intel_cbphy_rst_assert(cbphy);
> +		intel_cbphy_rst_deassert(cbphy);
> +		ret = intel_cbphy_set_mode(cbphy);
> +		if (ret)
> +			goto clk_err;
> +	}
> +
> +	ret = intel_cbphy_iphy_enable(iphy, true);
> +	if (ret) {
> +		dev_err(cbphy->dev, "Failed enabling PHY core\n");
> +		goto clk_err;
> +	}
> +
> +	ret = reset_control_deassert(iphy->app_rst);
> +	if (ret) {
> +		dev_err(cbphy->dev, "PHY(%u:%u) reset deassert failed!\n",
> +			COMBO_PHY_ID(iphy), PHY_ID(iphy));
> +		goto clk_err;
> +	}
> +
> +	/* Delay to ensure reset process is done */
> +	udelay(1);
> +
> +	return 0;
> +
> +clk_err:
> +	clk_disable_unprepare(cbphy->core_clk);
> +
> +	return ret;
> +}
> +
> +static int intel_cbphy_iphy_power_off(struct intel_cbphy_iphy *iphy)
> +{
> +	struct intel_combo_phy *cbphy = iphy->parent;
> +	int ret;
> +
> +	ret = reset_control_assert(iphy->app_rst);
> +	if (ret) {
> +		dev_err(cbphy->dev, "PHY(%u:%u) reset assert failed!\n",
> +			COMBO_PHY_ID(iphy), PHY_ID(iphy));
> +		return ret;
> +	}
> +
> +	ret = intel_cbphy_iphy_enable(iphy, false);
> +	if (ret) {
> +		dev_err(cbphy->dev, "Failed disabling PHY core\n");
> +		return ret;
> +	}
> +
> +	if (cbphy->init_cnt)
> +		return 0;
> +
> +	clk_disable_unprepare(cbphy->core_clk);
> +	intel_cbphy_rst_assert(cbphy);
> +
> +	return 0;
> +}
> +
> +static int intel_cbphy_init(struct phy *phy)
> +{
> +	struct intel_cbphy_iphy *iphy = phy_get_drvdata(phy);
> +	struct intel_combo_phy *cbphy = iphy->parent;
> +	int ret;
> +
> +	mutex_lock(&cbphy->lock);
> +	ret = intel_cbphy_iphy_cfg(iphy, intel_cbphy_iphy_power_on);
> +	if (ret)
> +		goto err;
> +
> +	if (cbphy->phy_mode == PHY_PCIE_MODE) {
> +		ret = intel_cbphy_iphy_cfg(iphy, intel_cbphy_pcie_en_pad_refclk);
> +		if (ret)
> +			goto err;
> +	}
> +
> +	cbphy->init_cnt++;
> +
> +err:
> +	mutex_unlock(&cbphy->lock);
> +
> +	return ret;
> +}
> +
> +static int intel_cbphy_exit(struct phy *phy)
> +{
> +	struct intel_cbphy_iphy *iphy = phy_get_drvdata(phy);
> +	struct intel_combo_phy *cbphy = iphy->parent;
> +	int ret;
> +
> +	mutex_lock(&cbphy->lock);
> +	cbphy->init_cnt--;
> +	if (cbphy->phy_mode == PHY_PCIE_MODE) {
> +		ret = intel_cbphy_iphy_cfg(iphy, intel_cbphy_pcie_dis_pad_refclk);
> +		if (ret)
> +			goto err;
> +	}
> +
> +	ret = intel_cbphy_iphy_cfg(iphy, intel_cbphy_iphy_power_off);
> +
> +err:
> +	mutex_unlock(&cbphy->lock);
> +
> +	return ret;
> +}
> +
> +static int intel_cbphy_calibrate(struct phy *phy)
> +{
> +	struct intel_cbphy_iphy *iphy = phy_get_drvdata(phy);
> +	struct intel_combo_phy *cbphy = iphy->parent;
> +	void __iomem *cr_base = cbphy->cr_base;
> +	int val, ret, id;
> +
> +	if (cbphy->phy_mode != PHY_XPCS_MODE)
> +		return 0;
> +
> +	id = PHY_ID(iphy);
> +
> +	/* trigger auto RX adaptation */
> +	combo_phy_w32_off_mask(cr_base, CR_ADDR(PCS_XF_ATE_OVRD_IN_2, id),
> +			       ADAPT_REQ_MSK, 3);
> +	/* Wait RX adaptation to finish */
> +	ret = readl_poll_timeout(cr_base + CR_ADDR(PCS_XF_RX_ADAPT_ACK, id),
> +				 val, val & RX_ADAPT_ACK_BIT, 10, 5000);
> +	if (ret)
> +		dev_err(cbphy->dev, "RX Adaptation failed!\n");
> +	else
> +		dev_dbg(cbphy->dev, "RX Adaptation success!\n");
> +
> +	/* Stop RX adaptation */
> +	combo_phy_w32_off_mask(cr_base, CR_ADDR(PCS_XF_ATE_OVRD_IN_2, id),
> +			       ADAPT_REQ_MSK, 0);
> +
> +	return ret;
> +}
> +
> +static int intel_cbphy_fwnode_parse(struct intel_combo_phy *cbphy)
> +{
> +	struct device *dev = cbphy->dev;
> +	struct platform_device *pdev = to_platform_device(dev);
> +	struct fwnode_handle *fwnode = dev_fwnode(dev);
> +	struct fwnode_reference_args ref;
> +	int ret;
> +	u32 val;
> +
> +	cbphy->core_clk = devm_clk_get(dev, NULL);
> +	if (IS_ERR(cbphy->core_clk)) {
> +		ret = PTR_ERR(cbphy->core_clk);
> +		if (ret != -EPROBE_DEFER)
> +			dev_err(dev, "Get clk failed:%d!\n", ret);
> +		return ret;
> +	}
> +
> +	cbphy->core_rst = devm_reset_control_get_optional(dev, "core");
> +	if (IS_ERR(cbphy->core_rst)) {
> +		ret = PTR_ERR(cbphy->core_rst);
> +		if (ret != -EPROBE_DEFER)
> +			dev_err(dev, "Get core reset control err: %d!\n", ret);
> +		return ret;
> +	}
> +
> +	cbphy->phy_rst = devm_reset_control_get_optional(dev, "phy");
> +	if (IS_ERR(cbphy->phy_rst)) {
> +		ret = PTR_ERR(cbphy->phy_rst);
> +		if (ret != -EPROBE_DEFER)
> +			dev_err(dev, "Get PHY reset control err: %d!\n", ret);
> +		return ret;
> +	}
> +
> +	cbphy->iphy[0].app_rst = devm_reset_control_get_optional(dev, "iphy0");
> +	if (IS_ERR(cbphy->iphy[0].app_rst)) {
> +		ret = PTR_ERR(cbphy->iphy[0].app_rst);
> +		if (ret != -EPROBE_DEFER)
> +			dev_err(dev, "Get phy0 reset control err: %d!\n", ret);
> +		return ret;
> +	}
> +
> +	cbphy->iphy[1].app_rst = devm_reset_control_get_optional(dev, "iphy1");
> +	if (IS_ERR(cbphy->iphy[1].app_rst)) {
> +		ret = PTR_ERR(cbphy->iphy[1].app_rst);
> +		if (ret != -EPROBE_DEFER)
> +			dev_err(dev, "Get phy1 reset control err: %d!\n", ret);
> +		return ret;
> +	}
> +
> +	cbphy->app_base = devm_platform_ioremap_resource_byname(pdev, "app");
> +	if (IS_ERR(cbphy->app_base))
> +		return PTR_ERR(cbphy->app_base);
> +
> +	cbphy->cr_base = devm_platform_ioremap_resource_byname(pdev, "core");
> +	if (IS_ERR(cbphy->cr_base))
> +		return PTR_ERR(cbphy->cr_base);
> +
> +	/*
> +	 * syscfg and hsiocfg variables stores the handle of the registers set
> +	 * in which ComboPhy subsytem specific registers are subset. Using
> +	 * Register map framework to access the registers set.
> +	 */
> +	ret = fwnode_property_get_reference_args(fwnode, "intel,syscfg", NULL,
> +						 1, 0, &ref);
> +	if (ret < 0)
> +		return ret;
> +
> +	cbphy->id = ref.args[0];
> +	cbphy->syscfg = device_node_to_regmap(to_of_node(ref.fwnode));
> +	fwnode_handle_put(ref.fwnode);
> +
> +	ret = fwnode_property_get_reference_args(fwnode, "intel,hsio", NULL, 1,
> +						 0, &ref);
> +	if (ret < 0)
> +		return ret;
> +
> +	cbphy->bid = ref.args[0];
> +	cbphy->hsiocfg = device_node_to_regmap(to_of_node(ref.fwnode));
> +	fwnode_handle_put(ref.fwnode);
> +
> +	ret = fwnode_property_read_u32_array(fwnode, "intel,phy-mode", &val, 1);
> +	if (ret)
> +		return ret;
> +
> +	switch (val) {
> +	case PHY_TYPE_PCIE:
> +		cbphy->phy_mode = PHY_PCIE_MODE;
> +		break;
> +
> +	case PHY_TYPE_SATA:
> +		cbphy->phy_mode = PHY_SATA_MODE;
> +		break;
> +
> +	case PHY_TYPE_XPCS:
> +		cbphy->phy_mode = PHY_XPCS_MODE;
> +		break;
> +
> +	default:
> +		dev_err(dev, "Invalid PHY mode: %u\n", val);
> +		return -EINVAL;
> +	}
> +
> +	cbphy->clk_rate = intel_iphy_clk_rates[cbphy->phy_mode];
> +
> +	if (fwnode_property_present(fwnode, "intel,aggregation"))
> +		cbphy->aggr_mode = PHY_DL_MODE;
> +	else
> +		cbphy->aggr_mode = PHY_SL_MODE;
> +
> +	return 0;
> +}
> +
> +static const struct phy_ops intel_cbphy_ops = {
> +	.init		= intel_cbphy_init,
> +	.exit		= intel_cbphy_exit,
> +	.calibrate	= intel_cbphy_calibrate,
> +	.owner		= THIS_MODULE,
> +};
> +
> +static struct phy *intel_cbphy_xlate(struct device *dev,
> +				     struct of_phandle_args *args)
> +{
> +	struct intel_combo_phy *cbphy = dev_get_drvdata(dev);
> +	u32 iphy_id;
> +
> +	if (args->args_count < 1) {
> +		dev_err(dev, "Invalid number of arguments\n");
> +		return ERR_PTR(-EINVAL);
> +	}
> +
> +	iphy_id = args->args[0];
> +	if (iphy_id >= PHY_MAX_NUM) {
> +		dev_err(dev, "Invalid phy instance %d\n", iphy_id);
> +		return ERR_PTR(-EINVAL);
> +	}
> +
> +	if (cbphy->aggr_mode == PHY_DL_MODE && iphy_id == PHY_1) {
> +		dev_err(dev, "Invalid. ComboPhy is in Dual lane mode %d\n", iphy_id);
> +		return ERR_PTR(-EINVAL);
> +	}
> +
> +	return cbphy->iphy[iphy_id].phy;
> +}
> +
> +static int intel_cbphy_create(struct intel_combo_phy *cbphy)
> +{
> +	struct phy_provider *phy_provider;
> +	struct device *dev = cbphy->dev;
> +	struct intel_cbphy_iphy *iphy;
> +	int i;
> +
> +	for (i = 0; i < PHY_MAX_NUM; i++) {
> +		iphy = &cbphy->iphy[i];
> +		iphy->parent = cbphy;
> +		iphy->id = i;
> +
> +		/* In dual lane mode skip phy creation for the second phy */
> +		if (cbphy->aggr_mode == PHY_DL_MODE && iphy->id == PHY_1)
> +			continue;
> +
> +		iphy->phy = devm_phy_create(dev, NULL, &intel_cbphy_ops);
> +		if (IS_ERR(iphy->phy)) {
> +			dev_err(dev, "PHY[%u:%u]: create PHY instance failed!\n",
> +				COMBO_PHY_ID(iphy), PHY_ID(iphy));
> +
> +			return PTR_ERR(iphy->phy);
> +		}
> +
> +		phy_set_drvdata(iphy->phy, iphy);
> +	}
> +
> +	dev_set_drvdata(dev, cbphy);
> +	phy_provider = devm_of_phy_provider_register(dev, intel_cbphy_xlate);
> +	if (IS_ERR(phy_provider))
> +		dev_err(dev, "Register PHY provider failed!\n");
> +
> +	return PTR_ERR_OR_ZERO(phy_provider);
> +}
> +
> +static int intel_cbphy_probe(struct platform_device *pdev)
> +{
> +	struct device *dev = &pdev->dev;
> +	struct intel_combo_phy *cbphy;
> +	int ret;
> +
> +	cbphy = devm_kzalloc(dev, sizeof(*cbphy), GFP_KERNEL);
> +	if (!cbphy)
> +		return -ENOMEM;
> +
> +	cbphy->dev = dev;
> +	cbphy->init_cnt = 0;
> +	mutex_init(&cbphy->lock);
> +	ret = intel_cbphy_fwnode_parse(cbphy);
> +	if (ret)
> +		return ret;
> +
> +	platform_set_drvdata(pdev, cbphy);
> +
> +	return intel_cbphy_create(cbphy);
> +}
> +
> +static int intel_cbphy_remove(struct platform_device *pdev)
> +{
> +	struct intel_combo_phy *cbphy = platform_get_drvdata(pdev);
> +
> +	intel_cbphy_rst_assert(cbphy);
> +	clk_disable_unprepare(cbphy->core_clk);
> +	return 0;
> +}
> +
> +static const struct of_device_id of_intel_cbphy_match[] = {
> +	{ .compatible = "intel,combo-phy" },
> +	{ .compatible = "intel,combophy-lgm" },
> +	{}
> +};
> +
> +static struct platform_driver intel_cbphy_driver = {
> +	.probe = intel_cbphy_probe,
> +	.remove = intel_cbphy_remove,
> +	.driver = {
> +		.name = "intel-combo-phy",
> +		.of_match_table = of_intel_cbphy_match,
> +	}
> +};
> +
> +module_platform_driver(intel_cbphy_driver);
> +
> +MODULE_DESCRIPTION("Intel Combo-phy driver");
> +MODULE_LICENSE("GPL v2");
> 

Powered by blists - more mailing lists