Re: Re: [RFC PATCH v4 3/4] phy: rockchip: add naneng combo phy for RK3568

[赵仪峰 <yifeng.zhao@rock-chips.com>]

Hi Johan，

>Hi Yifeng,
>
>Some comments...Have a look if it is useful.
>
>The key question is: does this RFC serie work?
>Is someone able to give a test report?
>
>Could you produce a version 5 serie?
>- Include lee.jones@linaro.org for MFD syscon.
>  Add "Acked by" to patch:
>  dt-bindings: mfd: syscon: add naneng combo phy register compatible
>
>- Change description for rockchip,enable-ssc for PCIE, SATA and USB in
>patch:
>  dt-bindings: phy: rockchip: Add Naneng combo PHY bindings
>
>  Add change log for rob+dt for a new review that explains why his
>  "Reviewed by" tag was not added.
>
>- If you like include some change suggestions from version 4.
>
>On 12/8/21 7:54 PM, Johan Jonker wrote:
>> From: Yifeng Zhao <yifeng.zhao@rock-chips.com>
>> 
>> This patch implements a combo phy driver for Rockchip SoCs
>> with NaNeng IP block. This phy can be used as pcie-phy, usb3-phy,
>> sata-phy or sgmii-phy.
>
>From Rockchip RK3568 Datasheet V1.0-20201210.pdf page 16-17:
>
>Multi-PHY0 support one of the following interfaces
>USB3.0 OTG
>SATA0
>
>Multi-PHY1 support one of the following interfaces
>USB3.0 Host
>SATA1
>QSGMII/SGMII
>
>Multi-PHY2 support one of the following interfaces
>PCIe2.1
>SATA2
>QSGMII/SGMII
>
>===
>
>This driver or documentation never mentions the phy combinations that
>are possible and with which DT properties. Any suggestions?
>
>===
>Missing gmac SGMII support?
>
>ethernet: stmicro: stmmac: Add SGMII/QSGMII support for RK3568
>https://github.com/rockchip-linux/kernel/commit/1fc7cbfe9e227c700c692f1de3137914b3ea6ca6
>
>net: stmmac: dwmac-rk: Set XPCS port1 speed for GMAC1 SGMII mode
>https://github.com/rockchip-linux/kernel/commit/0b1548f20254539c4fcc24f79a50581dfe164cc3
>
>===
>It looks like SGMII connects both to phy1 and phy2 ??
>How to do that in DT ?? Any example/suggestions ??
>
>	gmac0: ethernet@fe2a0000 {
>???? PHY_TYPE_SGMII
>	}
>
>	gmac1: ethernet@fe010000 {
>???? PHY_TYPE_SGMII
>	}
I don't know about that. 
It will be processed when the person in charge of the module upstrem the code.
>
>	sata0: sata@fc000000 {
>		phys = <&combphy0 PHY_TYPE_SATA>;
>		phy-names = "sata-phy";
>	}
>	sata1: sata@fc400000 {
>		phys = <&combphy1 PHY_TYPE_SATA>;
>		phy-names = "sata-phy";
>	}
>	sata2: sata@fc800000 {
>		phys = <&combphy2 PHY_TYPE_SATA>;
>		phy-names = "sata-phy";
>	}
>	usbdrd3_0: usb@fcc00000 {
>		phys = <&u2phy0_otg>, <&combphy0 PHY_TYPE_USB3>;
>		phy-names = "usb2-phy", "usb3-phy";
>	}
>	usbdrd3_1: usb@fd000000 {
>		phys = <&u2phy0_host>, <&combphy1 PHY_TYPE_USB3>;
>		phy-names = "usb2-phy", "usb3-phy";
>	}
>	pcie2x1: pcie@fe260000 {
>		phys = <&combphy2 PHY_TYPE_PCIE>;
>		phy-names = "pcie-phy";
>	}
>
>> 
>> Signed-off-by: Yifeng Zhao <yifeng.zhao@rock-chips.com>
>> Signed-off-by: Johan Jonker <jbx6244@gmail.com>
>> ---
>> 
>> TEST COMPILED ONLY!
>> Driver not verified with hardware!
>> ---
>> 
>> Changed V4:
>>   restyle
>>   add devm_reset_control_array_get()
>>   remove clk structure
>>   change refclk DT parse
>>   change dev_err message
>>   add dot to phrase
>>   add ext_refclk variable
>>   add enable_ssc variable
>>   rename rockchip_combphy_param_write
>>   remove param_read
>>   replace rockchip-naneng-combphy driver name
>> ---
>>  drivers/phy/rockchip/Kconfig                  |   8 +
>>  drivers/phy/rockchip/Makefile                 |   1 +
>>  .../rockchip/phy-rockchip-naneng-combphy.c    | 608 ++++++++++++++++++
>>  3 files changed, 617 insertions(+)
>>  create mode 100644 drivers/phy/rockchip/phy-rockchip-naneng-combphy.c
>> 
>> diff --git a/drivers/phy/rockchip/Kconfig b/drivers/phy/rockchip/Kconfig
>> index e812adad7..9022e395c 100644
>> --- a/drivers/phy/rockchip/Kconfig
>> +++ b/drivers/phy/rockchip/Kconfig
>> @@ -66,6 +66,14 @@ config PHY_ROCKCHIP_INNO_DSIDPHY
>>  	  Enable this to support the Rockchip MIPI/LVDS/TTL PHY with
>>  	  Innosilicon IP block.
>>  
>> +config PHY_ROCKCHIP_NANENG_COMBO_PHY
>> +	tristate "Rockchip NANENG COMBO PHY Driver"
>> +	depends on ARCH_ROCKCHIP && OF
>> +	select GENERIC_PHY
>> +	help
>> +	  Enable this to support the Rockchip PCIe/USB3.0/SATA/QSGMII
>> +	  combo PHY with NaNeng IP block.
>> +
>>  config PHY_ROCKCHIP_PCIE
>>  	tristate "Rockchip PCIe PHY Driver"
>>  	depends on (ARCH_ROCKCHIP && OF) || COMPILE_TEST
>> diff --git a/drivers/phy/rockchip/Makefile b/drivers/phy/rockchip/Makefile
>> index f0eec212b..a5041efb5 100644
>> --- a/drivers/phy/rockchip/Makefile
>> +++ b/drivers/phy/rockchip/Makefile
>> @@ -6,6 +6,7 @@ obj-$(CONFIG_PHY_ROCKCHIP_INNO_CSIDPHY)	+= phy-rockchip-inno-csidphy.o
>>  obj-$(CONFIG_PHY_ROCKCHIP_INNO_DSIDPHY)	+= phy-rockchip-inno-dsidphy.o
>>  obj-$(CONFIG_PHY_ROCKCHIP_INNO_HDMI)	+= phy-rockchip-inno-hdmi.o
>>  obj-$(CONFIG_PHY_ROCKCHIP_INNO_USB2)	+= phy-rockchip-inno-usb2.o
>> +obj-$(CONFIG_PHY_ROCKCHIP_NANENG_COMBO_PHY)	+= phy-rockchip-naneng-combphy.o
>>  obj-$(CONFIG_PHY_ROCKCHIP_PCIE)		+= phy-rockchip-pcie.o
>>  obj-$(CONFIG_PHY_ROCKCHIP_TYPEC)	+= phy-rockchip-typec.o
>>  obj-$(CONFIG_PHY_ROCKCHIP_USB)		+= phy-rockchip-usb.o
>> diff --git a/drivers/phy/rockchip/phy-rockchip-naneng-combphy.c b/drivers/phy/rockchip/phy-rockchip-naneng-combphy.c
>> new file mode 100644
>> index 000000000..56aaeed62
>> --- /dev/null
>> +++ b/drivers/phy/rockchip/phy-rockchip-naneng-combphy.c
>> @@ -0,0 +1,608 @@
>> +// SPDX-License-Identifier: GPL-2.0
>> +/*
>> + * Rockchip PIPE USB3.0 PCIE SATA combphy driver
>> + *
>> + * Copyright (C) 2021 Rockchip Electronics Co., Ltd.
>> + */
>> +
>> +#include <linux/clk.h>
>> +#include <linux/delay.h>
>> +#include <linux/io.h>
>> +#include <linux/iopoll.h>
>> +#include <linux/kernel.h>
>> +#include <linux/mfd/syscon.h>
>> +#include <linux/module.h>
>> +#include <linux/of_device.h>
>> +#include <linux/phy/phy.h>
>> +#include <linux/regmap.h>
>> +#include <linux/reset.h>
>> +#include <dt-bindings/phy/phy.h>
>> +
>> +#define BIT_WRITEABLE_SHIFT		16
>> +#define REF_CLOCK_24MHz			24000000
>> +#define REF_CLOCK_25MHz			25000000
>> +#define REF_CLOCK_100MHz		100000000
>> +/* RK3568 T22 COMBO PHY REG */
>> +#define RK3568_T22_PHYREG5		0x14
>> +#define T22_PHYREG5_PLL_DIV_MASK	GENMASK(7, 6)
>> +#define T22_PHYREG5_PLL_DIV_SHIFT	6
>> +#define T22_PHYREG5_PLL_DIV_2		1
>> +
>> +#define RK3568_T22_PHYREG6		0x18
>> +#define T22_PHYREG6_TX_RTERM_MASK	GENMASK(7, 4)
>> +#define T22_PHYREG6_TX_RTERM_SHIFT	4
>> +#define T22_PHYREG6_TX_RTERM_50OHM	0x8
>> +#define T22_PHYREG6_RX_RTERM_MASK	GENMASK(3, 0)
>> +#define T22_PHYREG6_RX_RTERM_SHIFT	0
>> +#define T22_PHYREG6_RX_RTERM_44OHM	0xF
>> +
>> +#define RK3568_T22_PHYREG7		0x1C
>> +#define T22_PHYREG7_SSC_EN		BIT(4)
>> +
>> +#define RK3568_T22_PHYREG10		0x28
>> +#define T22_PHYREG10_SU_TRIM_0_7	0xF0
>> +
>> +#define RK3568_T22_PHYREG11		0x2C
>> +#define T22_PHYREG11_PLL_LPF_ADJ	0x4
>> +
>> +#define RK3568_T22_PHYREG12		0x30
>> +#define T22_PHYREG12_RESISTER_MASK	GENMASK(5, 4)
>> +#define T22_PHYREG12_RESISTER_SHIFT	0x4
>> +#define T22_PHYREG12_RESISTER_HIGH_Z	0x3
>> +#define T22_PHYREG12_CKRCV_AMP0		BIT(7)
>> +
>> +#define RK3568_T22_PHYREG13		0x34
>> +#define T22_PHYREG13_CKRCV_AMP1		BIT(0)
>> +
>> +#define RK3568_T22_PHYREG14		0x38
>> +#define T22_PHYREG14_CTLE_EN		BIT(0)
>> +#define T22_PHYREG14_SSC_CNT_MASK	GENMASK(7, 6)
>> +#define T22_PHYREG14_SSC_CNT_SHIFT	6
>> +#define T22_PHYREG14_SSC_CNT_VALUE	0x1
>> +
>> +#define RK3568_T22_PHYREG15		0x3C
>> +#define T22_PHYREG15_SSC_CNT_VALUE	0x5f
>> +
>> +#define RK3568_T22_PHYREG17		0x44
>> +#define T22_PHYREG17_PLL_LOOP		0x32
>> +

>
>> +#define RK3568_T22_PHYREG31		0x7C
>> +#define T22_PHYREG31_SSC_MASK		GENMASK(7, 4)
>> +#define T22_PHYREG31_SSC_DIR_SHIFT	4
>> +#define T22_PHYREG31_SSC_UPWARD		0
>> +#define T22_PHYREG31_SSC_DOWNWARD	1
>> +#define T22_PHYREG31_SSC_OFFSET_SHIFT	6
>> +#define T22_PHYREG31_SSC_OFFSET_500PPM	1

>

>Where in the TRM can I find this reg description?

>Can't find matching bits???

>

>Rockchip RK3568 TRM Part2 V1.0-20210111.pdf

>page 1965 ???

>

>Multi-PHY_Register032

>Address: Operational Base + offset (0x007C)

>

>RES[7:0]

>[0]: bypass the mode of pd_ck100m controlling CKDRV

>1'b0: CKDRV is on only in PCIE mode

>1'b1: CKDRV is controlled by ckref_src[1:0];

>[1]: select signal of pll_lock to TX/RX

>1'b0: pll_lock is controlled by rate[1:0]

>1'b1: pll_lock is not controlled by rate[1:0]

>[2]: bypass the mode of rate[1:0] controlling pll_lock_pcs

>1'b0: pll_lock_pcs is controlled by rate[1:0]

>1'b1: pll_lock_pcs is not controlled by rate[1:0]

>[7:3]: Reserved

The IP document has been updated with new information as follows:
[3]: 50ohm termination disable signal in CKREP/N TX mode, 0: not disable, 1:
disable mode
[5:4]: select signal of SSC derection: 00: upward spread spectrum; 01: downward
spread spectrum, 10: no spread spectrum, 11: illegal
[7:6]: SSC offset compensation. 00: 0ppm; 01: +500ppm; 10/11: -500ppm

>> +
>> +#define RK3568_T22_PHYREG32		0x80
>> +#define T22_PHYREG32_PLL_KVCO_MASK	GENMASK(4, 2)
>> +#define T22_PHYREG32_PLL_KVCO_SHIFT	2
>> +#define T22_PHYREG32_PLL_KVCO_VALUE	2
>> +
>> +struct rockchip_combphy_priv;
>> +
>> +struct combphy_reg {
>> +	u16 offset;
>> +	u16 bitend;
>> +	u16 bitstart;
>> +	u16 disable;
>> +	u16 enable;
>> +};
>> +
>> +struct rockchip_combphy_grfcfg {
>> +	struct combphy_reg pcie_mode_set;
>> +	struct combphy_reg usb_mode_set;
>> +	struct combphy_reg sgmii_mode_set;
>> +	struct combphy_reg qsgmii_mode_set;
>> +	struct combphy_reg pipe_rxterm_set;
>> +	struct combphy_reg pipe_txelec_set;
>> +	struct combphy_reg pipe_txcomp_set;
>> +	struct combphy_reg pipe_clk_25m;
>> +	struct combphy_reg pipe_clk_100m;
>> +	struct combphy_reg pipe_phymode_sel;
>> +	struct combphy_reg pipe_rate_sel;
>> +	struct combphy_reg pipe_rxterm_sel;
>> +	struct combphy_reg pipe_txelec_sel;
>> +	struct combphy_reg pipe_txcomp_sel;
>> +	struct combphy_reg pipe_clk_ext;
>> +	struct combphy_reg pipe_sel_usb;
>> +	struct combphy_reg pipe_sel_qsgmii;
>> +	struct combphy_reg pipe_phy_status;
>> +	struct combphy_reg con0_for_pcie;
>> +	struct combphy_reg con1_for_pcie;
>> +	struct combphy_reg con2_for_pcie;
>> +	struct combphy_reg con3_for_pcie;
>> +	struct combphy_reg con0_for_sata;
>> +	struct combphy_reg con1_for_sata;
>> +	struct combphy_reg con2_for_sata;
>> +	struct combphy_reg con3_for_sata;
>> +	struct combphy_reg pipe_con0_for_sata;
>> +	struct combphy_reg pipe_sgmii_mac_sel;
>> +	struct combphy_reg pipe_xpcs_phy_ready;
>> +	struct combphy_reg u3otg0_port_en;
>> +	struct combphy_reg u3otg1_port_en;
>> +};
>> +
>> +struct rockchip_combphy_cfg {
>> +	const struct rockchip_combphy_grfcfg *grfcfg;
>> +	int (*combphy_cfg)(struct rockchip_combphy_priv *priv);
>> +};
>> +
>> +struct rockchip_combphy_priv {
>> +	u8 mode;
>> +	void __iomem *mmio;
>> +	int num_clks;
>> +	struct clk_bulk_data *clks;
>> +	struct device *dev;
>> +	struct regmap *pipe_grf;
>> +	struct regmap *phy_grf;
>> +	struct phy *phy;
>> +	struct reset_control *phy_rst;
>> +	const struct rockchip_combphy_cfg *cfg;
>> +	bool enable_ssc;
>> +	bool ext_refclk;
>> +	struct clk *refclk;
>> +};
>> +
>> +static int rockchip_combphy_param_write(struct regmap *base,
>> +					const struct combphy_reg *reg, bool en)
>> +{
>> +	u32 val, mask, tmp;
>> +
>> +	tmp = en ? reg->enable : reg->disable;
>> +	mask = GENMASK(reg->bitend, reg->bitstart);
>> +	val = (tmp << reg->bitstart) | (mask << BIT_WRITEABLE_SHIFT);
>> +
>> +	return regmap_write(base, reg->offset, val);
>> +}
>> +
>> +static u32 rockchip_combphy_is_ready(struct rockchip_combphy_priv *priv)
>> +{
>> +	const struct rockchip_combphy_grfcfg *cfg = priv->cfg->grfcfg;
>> +	u32 mask, val;
>> +
>> +	mask = GENMASK(cfg->pipe_phy_status.bitend,
>> +		       cfg->pipe_phy_status.bitstart);
>> +
>> +	regmap_read(priv->phy_grf, cfg->pipe_phy_status.offset, &val);
>> +	val = (val & mask) >> cfg->pipe_phy_status.bitstart;
>> +
>> +	return val;
>> +}
>> +
>> +static int rockchip_combphy_set_mode(struct rockchip_combphy_priv *priv)
>> +{
>> +	int ret = 0;
>> +
>> +	switch (priv->mode) {
>> +	case PHY_TYPE_PCIE:
>> +	case PHY_TYPE_USB3:
>> +	case PHY_TYPE_SATA:
>> +	case PHY_TYPE_SGMII:
>> +	case PHY_TYPE_QSGMII:
>> +		if (priv->cfg->combphy_cfg)
>> +			ret = priv->cfg->combphy_cfg(priv);
>> +		break;
>> +	default:
>> +		dev_err(priv->dev, "incompatible PHY type\n");
>> +		return -EINVAL;
>> +	}
>> +
>> +	if (ret)
>> +		dev_err(priv->dev, "failed to init phy for phy mode %x\n", priv->mode);
>> +
>> +	return ret;
>> +}
>> +
>> +static int rockchip_combphy_init(struct phy *phy)
>> +{
>> +	struct rockchip_combphy_priv *priv = phy_get_drvdata(phy);
>> +	const struct rockchip_combphy_grfcfg *cfg = priv->cfg->grfcfg;
>> +	u32 val;
>> +	int ret;
>> +
>> +	ret = clk_bulk_prepare_enable(priv->num_clks, priv->clks);
>> +	if (ret) {
>> +		dev_err(priv->dev, "failed to enable clks\n");
>> +		return ret;
>> +	}
>> +
>> +	ret = rockchip_combphy_set_mode(priv);
>> +	if (ret)
>> +		goto err_clk;
>> +
>> +	ret = reset_control_deassert(priv->phy_rst);
>> +	if (ret)
>> +		goto err_clk;
>> +
>> +	if (priv->mode == PHY_TYPE_USB3) {
>> +		ret = readx_poll_timeout_atomic(rockchip_combphy_is_ready,
>> +						priv, val,
>> +						val == cfg->pipe_phy_status.enable,
>> +						10, 1000);
>> +		if (ret)
>> +			dev_warn(priv->dev, "wait phy status ready timeout\n");
>> +	}
>> +
>> +	return 0;
>> +
>> +err_clk:
>> +	clk_bulk_disable_unprepare(priv->num_clks, priv->clks);
>> +
>> +	return ret;
>> +}
>> +
>> +static int rockchip_combphy_exit(struct phy *phy)
>> +{
>> +	struct rockchip_combphy_priv *priv = phy_get_drvdata(phy);
>> +
>> +	clk_bulk_disable_unprepare(priv->num_clks, priv->clks);
>> +	reset_control_assert(priv->phy_rst);
>> +
>> +	return 0;
>> +}
>> +
>> +static const struct phy_ops rochchip_combphy_ops = {
>> +	.init = rockchip_combphy_init,
>> +	.exit = rockchip_combphy_exit,
>> +	.owner = THIS_MODULE,
>> +};
>> +
>> +static struct phy *rockchip_combphy_xlate(struct device *dev, struct of_phandle_args *args)
>> +{
>> +	struct rockchip_combphy_priv *priv = dev_get_drvdata(dev);
>> +
>> +	if (args->args_count != 1) {
>> +		dev_err(dev, "invalid number of arguments\n");
>> +		return ERR_PTR(-EINVAL);
>> +	}
>> +
>> +	if (priv->mode != PHY_NONE && priv->mode != args->args[0])
>> +		dev_warn(dev, "phy type select %d overwriting type %d\n",
>> +			 args->args[0], priv->mode);
>> +
>> +	priv->mode = args->args[0];
>> +
>> +	return priv->phy;
>> +}
>> +
>> +static int rockchip_combphy_parse_dt(struct device *dev, struct rockchip_combphy_priv *priv)
>> +{
>> +	const struct rockchip_combphy_cfg *phy_cfg = priv->cfg;
>> +	int mac_id;
>> +	int i;
>> +
>> +	priv->num_clks = devm_clk_bulk_get_all(dev, &priv->clks);
>> +	if (priv->num_clks < 1)
>> +		return -EINVAL;
>> +
>> +	priv->refclk = NULL;
>> +	for (i = 0; i < priv->num_clks; i++) {
>> +		if (!strncmp(priv->clks[i].id, "ref", 3)) {
>> +			priv->refclk = priv->clks[i].clk;
>> +			break;
>> +		}
>> +	}
>> +
>> +	if (!priv->refclk) {
>> +		dev_err(dev, "no refclk found\n");
>> +		return -EINVAL;
>> +	}
>> +
>> +	priv->pipe_grf = syscon_regmap_lookup_by_phandle(dev->of_node, "rockchip,pipe-grf");
>> +	if (IS_ERR(priv->pipe_grf)) {
>> +		dev_err(dev, "failed to find peri_ctrl pipe-grf regmap\n");
>> +		return PTR_ERR(priv->pipe_grf);
>> +	}
>> +
>> +	priv->phy_grf = syscon_regmap_lookup_by_phandle(dev->of_node, "rockchip,pipe-phy-grf");
>> +	if (IS_ERR(priv->phy_grf)) {
>> +		dev_err(dev, "failed to find peri_ctrl pipe-phy-grf regmap\n");
>> +		return PTR_ERR(priv->phy_grf);
>> +	}
>> +

>
>> +	if (device_property_present(dev, "rockchip,dis-u3otg0-port"))
>> +		rockchip_combphy_param_write(priv->pipe_grf, &phy_cfg->grfcfg->u3otg0_port_en,
>> +					     false);
>> +
>> +	if (device_property_present(dev, "rockchip,dis-u3otg1-port"))
>> +		rockchip_combphy_param_write(priv->pipe_grf, &phy_cfg->grfcfg->u3otg1_port_en,
>> +					     false);
>> +
>> +	priv->enable_ssc = device_property_present(dev, "rockchip,enable-ssc");
>> +
>> +	priv->ext_refclk = device_property_present(dev, "rockchip,ext-refclk");
>> +
>> +	if (!device_property_read_u32(dev, "rockchip,sgmii-mac-sel", &mac_id) &&
>> +	    (mac_id > 0))
>> +		rockchip_combphy_param_write(priv->pipe_grf, &phy_cfg->grfcfg->pipe_sgmii_mac_sel,
>> +					     true);
>> +	else
>> +		rockchip_combphy_param_write(priv->pipe_grf, &phy_cfg->grfcfg->pipe_sgmii_mac_sel,
>> +					     false);
>
>When a module is reloaded or when bits are previously set by u-boot it
>doesn't garantee that they are in default state, does it?
>Maybe always set them regardless if the property is present to default
>or a value.
>
>val = condition ? true : false;
>
>rockchip_combphy_param_write(priv->pipe_grf,
>&phy_cfg->grfcfg->pipe_sgmii_mac_sel,
>val);
>
>>> +>> +	priv->phy_rst = devm_reset_control_array_get(dev, false, false);
>
>Does this work?

Yes, this code can work, but it also reset apb_reset together, which will affect the configuration of some registers.
I reomve apb_reset that does not need to be used in DTS to fix it.

>> +	if (IS_ERR(priv->phy_rst))>> +		return dev_err_probe(dev, PTR_ERR(priv->phy_rst), "failed to get phy reset\n");>> +>> +	return 0;>> +}>> +>> +static int rockchip_combphy_probe(struct platform_device *pdev)>> +{>> +	struct phy_provider *phy_provider;>> +	struct device *dev = &pdev->dev;>> +	struct rockchip_combphy_priv *priv;>> +	const struct rockchip_combphy_cfg *phy_cfg;>> +	struct resource *res;>> +	int ret;>> +>> +	phy_cfg = of_device_get_match_data(dev);>> +	if (!phy_cfg) {
>> +		dev_err(dev, "no OF match data provided\n");
>> +		return -EINVAL;
>> +	}
>> +
>> +	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
>> +	if (!priv)
>> +		return -ENOMEM;
>> +
>> +	priv->mmio = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
>> +	if (IS_ERR(priv->mmio)) {
>> +		ret = PTR_ERR(priv->mmio);
>> +		return ret;
>> +	}
>> +
>> +	priv->dev = dev;
>> +	priv->mode = PHY_NONE;
>> +	priv->cfg = phy_cfg;
>> +
>> +	ret = rockchip_combphy_parse_dt(dev, priv);
>> +	if (ret)
>> +		return ret;
>> +
>> +	ret = reset_control_assert(priv->phy_rst);
>> +	if (ret) {
>> +		dev_err(dev, "failed to reset phy\n");
>> +		return ret;
>> +	}
>> +
>> +	priv->phy = devm_phy_create(dev, NULL, &rochchip_combphy_ops);
>> +	if (IS_ERR(priv->phy)) {
>> +		dev_err(dev, "failed to create combphy\n");
>> +		return PTR_ERR(priv->phy);
>> +	}
>> +
>> +	dev_set_drvdata(dev, priv);
>> +	phy_set_drvdata(priv->phy, priv);
>> +
>> +	phy_provider = devm_of_phy_provider_register(dev, rockchip_combphy_xlate);
>> +
>> +	return PTR_ERR_OR_ZERO(phy_provider);
>> +}
>> +
>> +static int rk3568_combphy_cfg(struct rockchip_combphy_priv *priv)
>> +{
>> +	const struct rockchip_combphy_grfcfg *cfg = priv->cfg->grfcfg;
>> +	unsigned long rate;
>> +	u32 val;
>> +
>> +	switch (priv->mode) {
>> +	case PHY_TYPE_PCIE:
>> +		/* Set SSC downward spread spectrum. */
>> +		val = readl(priv->mmio + RK3568_T22_PHYREG31);
>> +		val &= ~T22_PHYREG31_SSC_MASK;
>> +		val |= T22_PHYREG31_SSC_DOWNWARD << T22_PHYREG31_SSC_DIR_SHIFT;
>> +		writel(val, priv->mmio + RK3568_T22_PHYREG31);
>> +
>> +		rockchip_combphy_param_write(priv->phy_grf, &cfg->con0_for_pcie, true);
>> +		rockchip_combphy_param_write(priv->phy_grf, &cfg->con1_for_pcie, true);
>> +		rockchip_combphy_param_write(priv->phy_grf, &cfg->con2_for_pcie, true);
>> +		rockchip_combphy_param_write(priv->phy_grf, &cfg->con3_for_pcie, true);
>> +		break;
>> +	case PHY_TYPE_USB3:
>> +		/* Set SSC downward spread spectrum. */
>> +		val = readl(priv->mmio + RK3568_T22_PHYREG31);
>> +		val &= ~T22_PHYREG31_SSC_MASK;
>> +		val |= T22_PHYREG31_SSC_DOWNWARD << T22_PHYREG31_SSC_DIR_SHIFT;
>> +		writel(val, priv->mmio + RK3568_T22_PHYREG31);
>> +
>> +		/* Enable adaptive CTLE for USB3.0 Rx. */
>> +		val = readl(priv->mmio + RK3568_T22_PHYREG14);
>> +		val |= T22_PHYREG14_CTLE_EN;
>> +		writel(val, priv->mmio + RK3568_T22_PHYREG14);
>> +
>> +		/* Set PLL KVCO fine tuning signals. */
>> +		val = readl(priv->mmio + RK3568_T22_PHYREG32);
>> +		val &= ~T22_PHYREG32_PLL_KVCO_MASK;
>> +		val |= T22_PHYREG32_PLL_KVCO_VALUE << T22_PHYREG32_PLL_KVCO_SHIFT;
>> +		writel(val, priv->mmio + RK3568_T22_PHYREG32);
>> +
>> +		/* Enable controlling random jitter. */
>> +		writel(T22_PHYREG11_PLL_LPF_ADJ, priv->mmio + RK3568_T22_PHYREG11);
>> +
>> +		/* Set PLL input clock divider 1/2. */
>> +		val = readl(priv->mmio + RK3568_T22_PHYREG5);
>> +		val &= ~T22_PHYREG5_PLL_DIV_MASK;
>> +		val |= T22_PHYREG5_PLL_DIV_2 << T22_PHYREG5_PLL_DIV_SHIFT;
>> +		writel(val, priv->mmio + RK3568_T22_PHYREG5);
>> +
>> +		writel(T22_PHYREG17_PLL_LOOP, priv->mmio + RK3568_T22_PHYREG17);
>> +		writel(T22_PHYREG10_SU_TRIM_0_7, priv->mmio + RK3568_T22_PHYREG10);
>> +
>> +		rockchip_combphy_param_write(priv->phy_grf, &cfg->pipe_sel_usb, true);
>> +		rockchip_combphy_param_write(priv->phy_grf, &cfg->pipe_txcomp_sel, false);
>> +		rockchip_combphy_param_write(priv->phy_grf, &cfg->pipe_txelec_sel, false);
>> +		rockchip_combphy_param_write(priv->phy_grf, &cfg->usb_mode_set, true);
>> +		break;
>> +	case PHY_TYPE_SATA:
>> +		/* Enable adaptive CTLE for SATA Rx. */
>> +		val = readl(priv->mmio + RK3568_T22_PHYREG14);
>> +		val |= T22_PHYREG14_CTLE_EN;
>> +		writel(val, priv->mmio + RK3568_T22_PHYREG14);
>> +		/*
>> +		 * Set tx_rterm=50ohm and rx_rterm=44ohm for SATA.
>> +		 * 0: 60ohm, 8: 50ohm 15: 44ohm (by step abort 1ohm)
>> +		 */
>> +		val = T22_PHYREG6_TX_RTERM_50OHM << T22_PHYREG6_TX_RTERM_SHIFT;
>> +		val |= T22_PHYREG6_RX_RTERM_44OHM << T22_PHYREG6_RX_RTERM_SHIFT;
>> +		writel(val, priv->mmio + RK3568_T22_PHYREG6);
>> +
>> +		rockchip_combphy_param_write(priv->phy_grf, &cfg->con0_for_sata, true);
>> +		rockchip_combphy_param_write(priv->phy_grf, &cfg->con1_for_sata, true);
>> +		rockchip_combphy_param_write(priv->phy_grf, &cfg->con2_for_sata, true);
>> +		rockchip_combphy_param_write(priv->phy_grf, &cfg->con3_for_sata, true);
>> +		rockchip_combphy_param_write(priv->pipe_grf, &cfg->pipe_con0_for_sata, true);
>> +		break;
>> +	case PHY_TYPE_SGMII:
>> +		rockchip_combphy_param_write(priv->pipe_grf, &cfg->pipe_xpcs_phy_ready, true);
>> +		rockchip_combphy_param_write(priv->phy_grf, &cfg->pipe_phymode_sel, true);
>> +		rockchip_combphy_param_write(priv->phy_grf, &cfg->pipe_sel_qsgmii, true);
>> +		rockchip_combphy_param_write(priv->phy_grf, &cfg->sgmii_mode_set, true);
>> +		break;
>> +	case PHY_TYPE_QSGMII:
>> +		rockchip_combphy_param_write(priv->pipe_grf, &cfg->pipe_xpcs_phy_ready, true);
>> +		rockchip_combphy_param_write(priv->phy_grf, &cfg->pipe_phymode_sel, true);
>> +		rockchip_combphy_param_write(priv->phy_grf, &cfg->pipe_rate_sel, true);
>> +		rockchip_combphy_param_write(priv->phy_grf, &cfg->pipe_sel_qsgmii, true);
>> +		rockchip_combphy_param_write(priv->phy_grf, &cfg->qsgmii_mode_set, true);
>> +		break;
>> +	default:
>> +		dev_err(priv->dev, "incompatible PHY type\n");
>> +		return -EINVAL;
>> +	}
>> +
>> +	rate = clk_get_rate(priv->refclk);
>> +
>> +	switch (rate) {
>> +	case REF_CLOCK_24MHz:
>> +		if (priv->mode == PHY_TYPE_USB3 || priv->mode == PHY_TYPE_SATA) {
>> +			/* Set ssc_cnt[9:0]=0101111101 & 31.5KHz. */
>> +			val = readl(priv->mmio + RK3568_T22_PHYREG14);
>> +			val &= ~T22_PHYREG14_SSC_CNT_MASK;
>> +			val |= T22_PHYREG14_SSC_CNT_VALUE << T22_PHYREG14_SSC_CNT_SHIFT;
>> +			writel(val, priv->mmio + RK3568_T22_PHYREG14);
>> +			writel(T22_PHYREG15_SSC_CNT_VALUE, priv->mmio + RK3568_T22_PHYREG15);
>> +		}
>> +		break;
>> +	case REF_CLOCK_25MHz:
>> +		rockchip_combphy_param_write(priv->phy_grf, &cfg->pipe_clk_25m, true);
>> +		break;
>> +	case REF_CLOCK_100MHz:
>> +		rockchip_combphy_param_write(priv->phy_grf, &cfg->pipe_clk_100m, true);
>> +		if (priv->mode == PHY_TYPE_PCIE) {
>> +			/* PLL KVCO  fine tuning. */
>> +			val = readl(priv->mmio + RK3568_T22_PHYREG32);
>> +			val &= ~T22_PHYREG32_PLL_KVCO_MASK;
>> +			val |= T22_PHYREG32_PLL_KVCO_VALUE << T22_PHYREG32_PLL_KVCO_SHIFT;
>> +			writel(val, priv->mmio + RK3568_T22_PHYREG32);
>> +
>> +			/* Enable controlling random jitter. */
>> +			writel(T22_PHYREG11_PLL_LPF_ADJ, priv->mmio + RK3568_T22_PHYREG11);
>> +
>> +			val = readl(priv->mmio + RK3568_T22_PHYREG5);
>> +			val &= ~T22_PHYREG5_PLL_DIV_MASK;
>> +			val |= T22_PHYREG5_PLL_DIV_2 << T22_PHYREG5_PLL_DIV_SHIFT;
>> +			writel(val, priv->mmio + RK3568_T22_PHYREG5);
>> +
>> +			writel(T22_PHYREG17_PLL_LOOP, priv->mmio + RK3568_T22_PHYREG17);
>> +			writel(T22_PHYREG10_SU_TRIM_0_7, priv->mmio + RK3568_T22_PHYREG10);
>> +		} else if (priv->mode == PHY_TYPE_SATA) {
>> +			/* downward spread spectrum +500ppm */
>> +			val = readl(priv->mmio + RK3568_T22_PHYREG31);
>> +			val &= ~T22_PHYREG31_SSC_MASK;
>> +			val |= T22_PHYREG31_SSC_DOWNWARD << T22_PHYREG31_SSC_DIR_SHIFT;
>> +			val |= T22_PHYREG31_SSC_OFFSET_500PPM << T22_PHYREG31_SSC_OFFSET_SHIFT;
>> +			writel(val, priv->mmio + RK3568_T22_PHYREG31);
>> +		}
>> +		break;
>> +	default:
>> +		dev_err(priv->dev, "unsupported rate: %lu\n", rate);
>> +		return -EINVAL;
>> +	}
>> +
>> +	if (priv->ext_refclk) {
>> +		rockchip_combphy_param_write(priv->phy_grf, &cfg->pipe_clk_ext, true);
>> +		if (priv->mode == PHY_TYPE_PCIE && rate == REF_CLOCK_100MHz) {
>> +			val = readl(priv->mmio + RK3568_T22_PHYREG12);
>> +			val &= ~T22_PHYREG12_RESISTER_MASK;
>> +			val |= T22_PHYREG12_RESISTER_HIGH_Z << T22_PHYREG12_RESISTER_SHIFT;
>> +			val |= T22_PHYREG12_CKRCV_AMP0;
>> +			writel(val, priv->mmio + RK3568_T22_PHYREG12);
>> +
>> +			val = readl(priv->mmio + RK3568_T22_PHYREG13);
>> +			val |= T22_PHYREG13_CKRCV_AMP1;
>> +			writel(val, priv->mmio + RK3568_T22_PHYREG13);
>> +		}
>> +	}
>> +
>> +	if (priv->enable_ssc) {
>> +		val = readl(priv->mmio + RK3568_T22_PHYREG7);
>> +		val |= T22_PHYREG7_SSC_EN;
>> +		writel(val, priv->mmio + RK3568_T22_PHYREG7);
>> +	}
>> +
>> +	return 0;
>> +}
>> +
>> +static const struct rockchip_combphy_grfcfg rk3568_combphy_grfcfgs = {
>> +	/* pipe-phy-grf */
>> +	.pcie_mode_set		= { 0x0000, 5, 0, 0x00, 0x11 },
>> +	.usb_mode_set		= { 0x0000, 5, 0, 0x00, 0x04 },
>> +	.sgmii_mode_set		= { 0x0000, 5, 0, 0x00, 0x01 },
>> +	.qsgmii_mode_set	= { 0x0000, 5, 0, 0x00, 0x21 },
>> +	.pipe_rxterm_set	= { 0x0000, 12, 12, 0x00, 0x01 },
>> +	.pipe_txelec_set	= { 0x0004, 1, 1, 0x00, 0x01 },
>> +	.pipe_txcomp_set	= { 0x0004, 4, 4, 0x00, 0x01 },
>> +	.pipe_clk_25m		= { 0x0004, 14, 13, 0x00, 0x01 },
>> +	.pipe_clk_100m		= { 0x0004, 14, 13, 0x00, 0x02 },
>> +	.pipe_phymode_sel	= { 0x0008, 1, 1, 0x00, 0x01 },
>> +	.pipe_rate_sel		= { 0x0008, 2, 2, 0x00, 0x01 },
>> +	.pipe_rxterm_sel	= { 0x0008, 8, 8, 0x00, 0x01 },
>> +	.pipe_txelec_sel	= { 0x0008, 12, 12, 0x00, 0x01 },
>> +	.pipe_txcomp_sel	= { 0x0008, 15, 15, 0x00, 0x01 },
>> +	.pipe_clk_ext		= { 0x000c, 9, 8, 0x02, 0x01 },
>> +	.pipe_sel_usb		= { 0x000c, 14, 13, 0x00, 0x01 },
>> +	.pipe_sel_qsgmii	= { 0x000c, 15, 13, 0x00, 0x07 },
>> +	.pipe_phy_status	= { 0x0034, 6, 6, 0x01, 0x00 },
>> +	.con0_for_pcie		= { 0x0000, 15, 0, 0x00, 0x1000 },
>> +	.con1_for_pcie		= { 0x0004, 15, 0, 0x00, 0x0000 },
>> +	.con2_for_pcie		= { 0x0008, 15, 0, 0x00, 0x0101 },
>> +	.con3_for_pcie		= { 0x000c, 15, 0, 0x00, 0x0200 },
>> +	.con0_for_sata		= { 0x0000, 15, 0, 0x00, 0x0119 },
>> +	.con1_for_sata		= { 0x0004, 15, 0, 0x00, 0x0040 },
>> +	.con2_for_sata		= { 0x0008, 15, 0, 0x00, 0x80c3 },
>> +	.con3_for_sata		= { 0x000c, 15, 0, 0x00, 0x4407 },
>> +	/* pipe-grf */
>> +	.pipe_con0_for_sata	= { 0x0000, 15, 0, 0x00, 0x2220 },
>> +	.pipe_sgmii_mac_sel	= { 0x0040, 1, 1, 0x00, 0x01 },
>> +	.pipe_xpcs_phy_ready	= { 0x0040, 2, 2, 0x00, 0x01 },
>> +	.u3otg0_port_en		= { 0x0104, 15, 0, 0x0181, 0x1100 },
>> +	.u3otg1_port_en		= { 0x0144, 15, 0, 0x0181, 0x1100 },
>> +};
>> +
>> +static const struct rockchip_combphy_cfg rk3568_combphy_cfgs = {
>> +	.grfcfg		= &rk3568_combphy_grfcfgs,
>> +	.combphy_cfg	= rk3568_combphy_cfg,
>> +};
>> +
>> +static const struct of_device_id rockchip_combphy_of_match[] = {
>> +	{
>> +		.compatible = "rockchip,rk3568-naneng-combphy",
>> +		.data = &rk3568_combphy_cfgs,
>> +	},
>> +	{ },
>> +};
>> +MODULE_DEVICE_TABLE(of, rockchip_combphy_of_match);
>> +
>> +static struct platform_driver rockchip_combphy_driver = {
>> +	.probe	= rockchip_combphy_probe,
>> +	.driver = {
>> +		.name = "rockchip-naneng-combphy",
>> +		.of_match_table = rockchip_combphy_of_match,
>> +	},
>> +};
>> +module_platform_driver(rockchip_combphy_driver);
>> +
>> +MODULE_DESCRIPTION("Rockchip NANENG COMBPHY driver");
>> +MODULE_LICENSE("GPL v2");
>> 

-- 
linux-phy mailing list
linux-phy@lists.infradead.org
https://lists.infradead.org/mailman/listinfo/linux-phy