diff mbox series

[v11,06/13] usb: dwc3: core: Refactor PHY logic to support Multiport Controller

Message ID 20230828133033.11988-7-quic_kriskura@quicinc.com
State Superseded
Headers show
Series [v11,01/13] dt-bindings: usb: qcom,dwc3: Add bindings for SC8280 Multiport | expand

Commit Message

Krishna Kurapati Aug. 28, 2023, 1:30 p.m. UTC
From: Harsh Agarwal <quic_harshq@quicinc.com>

Currently the DWC3 driver supports only single port controller
which requires at most one HS and one SS PHY.

But the DWC3 USB controller can be connected to multiple ports and
each port can have their own PHYs. Each port of the multiport
controller can either be HS+SS capable or HS only capable
Proper quantification of them is required to modify GUSB2PHYCFG
and GUSB3PIPECTL registers appropriately.

Add support for detecting, obtaining and configuring phy's supported
by a multiport controller and. Limit the max number of ports
supported to 4 as only SC8280 which is a quad port controller supports
Multiport currently.

Co-developed-by: Harsh Agarwal <quic_harshq@quicinc.com>
Signed-off-by: Harsh Agarwal <quic_harshq@quicinc.com>
Co-developed-by:Krishna Kurapati <quic_kriskura@quicinc.com>
Signed-off-by: Krishna Kurapati <quic_kriskura@quicinc.com>
---
 drivers/usb/dwc3/core.c | 252 +++++++++++++++++++++++++++-------------
 drivers/usb/dwc3/core.h |  11 +-
 drivers/usb/dwc3/drd.c  |  15 ++-
 3 files changed, 190 insertions(+), 88 deletions(-)

Comments

Krishna Kurapati Sept. 1, 2023, 9:54 p.m. UTC | #1
On 9/1/2023 6:43 AM, Wesley Cheng wrote:
> Hi Krishna,
> 
>>           if (dwc->usb2_phy)
>>               otg_set_vbus(dwc->usb2_phy->otg, false);
>> -        phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_DEVICE);
>> -        phy_set_mode(dwc->usb3_generic_phy, PHY_MODE_USB_DEVICE);
>> +        phy_set_mode(dwc->usb2_generic_phy[0], PHY_MODE_USB_DEVICE);
>> +        phy_set_mode(dwc->usb3_generic_phy[0], PHY_MODE_USB_DEVICE);
> 
> Throughout this patch, you are looping across all PHYs irrespective of 
> if we are in device mode or not.  This is the only exception where you 
> are setting only PHY index 0 (for both SS and HS PHYs).  Do you think we 
> should also only modify PHY index#0 for other PHY related sequences?
> 
Hi Wesley,

  Multiport controllers are host only capable currently. So if the 
GHWPARAMS indicate we are DRD/peripheral capable, we set 
num_usb2/3_ports to "1" unconditionally. So there would not be any 
looping necessary here.

>>           if (ret)
>> @@ -1804,9 +1887,12 @@ static int dwc3_read_port_info(struct dwc3 *dwc)
>>       dev_dbg(dwc->dev, "hs-ports: %u ss-ports: %u\n",
>>               dwc->num_usb2_ports, dwc->num_usb3_ports);
>> -
>>       iounmap(base);
>> +    if ((dwc->num_usb2_ports > DWC3_MAX_PORTS) ||
>> +        (dwc->num_usb3_ports > DWC3_MAX_PORTS))
>> +        return -ENOMEM;
>> +
> 
> Shouldn't this be more applicable to be included in patch#4 in this series?
> 
The read_port_info function was only initially intended to read only 
port count and later the macro was added. So the check was put here.

Regards,
Krishna,
kernel test robot Sept. 19, 2023, 5:26 p.m. UTC | #2
Hi Krishna,

kernel test robot noticed the following build warnings:

[auto build test WARNING on usb/usb-testing]
[also build test WARNING on usb/usb-next usb/usb-linus robh/for-next pza/reset/next linus/master v6.6-rc2 next-20230919]
[cannot apply to pza/imx-drm/next]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Krishna-Kurapati/dt-bindings-usb-qcom-dwc3-Add-bindings-for-SC8280-Multiport/20230828-214326
base:   https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing
patch link:    https://lore.kernel.org/r/20230828133033.11988-7-quic_kriskura%40quicinc.com
patch subject: [PATCH v11 06/13] usb: dwc3: core: Refactor PHY logic to support Multiport Controller
config: x86_64-randconfig-011-20230902 (https://download.01.org/0day-ci/archive/20230920/202309200156.CxQ3yaLY-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20230920/202309200156.CxQ3yaLY-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202309200156.CxQ3yaLY-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/usb/dwc3/core.c: In function 'dwc3_core_get_phy':
>> drivers/usb/dwc3/core.c:1375:53: warning: '%d' directive writing between 1 and 3 bytes into a region of size 2 [-Wformat-overflow=]
    1375 |                         sprintf(phy_name, "usb2-port%d", i);
         |                                                     ^~
   drivers/usb/dwc3/core.c:1375:43: note: directive argument in the range [0, 254]
    1375 |                         sprintf(phy_name, "usb2-port%d", i);
         |                                           ^~~~~~~~~~~~~
   drivers/usb/dwc3/core.c:1375:25: note: 'sprintf' output between 11 and 13 bytes into a destination of size 11
    1375 |                         sprintf(phy_name, "usb2-port%d", i);
         |                         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/usb/dwc3/core.c:1390:53: warning: '%d' directive writing between 1 and 3 bytes into a region of size 2 [-Wformat-overflow=]
    1390 |                         sprintf(phy_name, "usb3-port%d", i);
         |                                                     ^~
   drivers/usb/dwc3/core.c:1390:43: note: directive argument in the range [0, 254]
    1390 |                         sprintf(phy_name, "usb3-port%d", i);
         |                                           ^~~~~~~~~~~~~
   drivers/usb/dwc3/core.c:1390:25: note: 'sprintf' output between 11 and 13 bytes into a destination of size 11
    1390 |                         sprintf(phy_name, "usb3-port%d", i);
         |                         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


vim +1375 drivers/usb/dwc3/core.c

  1338	
  1339	static int dwc3_core_get_phy(struct dwc3 *dwc)
  1340	{
  1341		struct device		*dev = dwc->dev;
  1342		struct device_node	*node = dev->of_node;
  1343		char phy_name[11];
  1344		int ret;
  1345		int i;
  1346	
  1347		if (node) {
  1348			dwc->usb2_phy = devm_usb_get_phy_by_phandle(dev, "usb-phy", 0);
  1349			dwc->usb3_phy = devm_usb_get_phy_by_phandle(dev, "usb-phy", 1);
  1350		} else {
  1351			dwc->usb2_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
  1352			dwc->usb3_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB3);
  1353		}
  1354	
  1355		if (IS_ERR(dwc->usb2_phy)) {
  1356			ret = PTR_ERR(dwc->usb2_phy);
  1357			if (ret == -ENXIO || ret == -ENODEV)
  1358				dwc->usb2_phy = NULL;
  1359			else
  1360				return dev_err_probe(dev, ret, "no usb2 phy configured\n");
  1361		}
  1362	
  1363		if (IS_ERR(dwc->usb3_phy)) {
  1364			ret = PTR_ERR(dwc->usb3_phy);
  1365			if (ret == -ENXIO || ret == -ENODEV)
  1366				dwc->usb3_phy = NULL;
  1367			else
  1368				return dev_err_probe(dev, ret, "no usb3 phy configured\n");
  1369		}
  1370	
  1371		for (i = 0; i < dwc->num_usb2_ports; i++) {
  1372			if (dwc->num_usb2_ports == 1)
  1373				sprintf(phy_name, "usb2-phy");
  1374			else
> 1375				sprintf(phy_name, "usb2-port%d", i);
  1376	
  1377			dwc->usb2_generic_phy[i] = devm_phy_get(dev, phy_name);
  1378			if (IS_ERR(dwc->usb2_generic_phy[i])) {
  1379				ret = PTR_ERR(dwc->usb2_generic_phy[i]);
  1380				if (ret == -ENOSYS || ret == -ENODEV)
  1381					dwc->usb2_generic_phy[i] = NULL;
  1382				else
  1383					return dev_err_probe(dev, ret,
  1384						"failed to lookup phy %s\n", phy_name);
  1385			}
  1386	
  1387			if (dwc->num_usb2_ports == 1)
  1388				sprintf(phy_name, "usb3-phy");
  1389			else
  1390				sprintf(phy_name, "usb3-port%d", i);
  1391	
  1392			dwc->usb3_generic_phy[i] = devm_phy_get(dev, phy_name);
  1393			if (IS_ERR(dwc->usb3_generic_phy[i])) {
  1394				ret = PTR_ERR(dwc->usb3_generic_phy[i]);
  1395				if (ret == -ENOSYS || ret == -ENODEV)
  1396					dwc->usb3_generic_phy[i] = NULL;
  1397				else
  1398					return dev_err_probe(dev, ret,
  1399						"failed to lookup phy %s\n", phy_name);
  1400			}
  1401		}
  1402	
  1403		return 0;
  1404	}
  1405
Thinh Nguyen Oct. 2, 2023, 5:19 p.m. UTC | #3
On Mon, Aug 28, 2023, Krishna Kurapati wrote:
> From: Harsh Agarwal <quic_harshq@quicinc.com>
> 
> Currently the DWC3 driver supports only single port controller
> which requires at most one HS and one SS PHY.
> 
> But the DWC3 USB controller can be connected to multiple ports and
> each port can have their own PHYs. Each port of the multiport
> controller can either be HS+SS capable or HS only capable
> Proper quantification of them is required to modify GUSB2PHYCFG
> and GUSB3PIPECTL registers appropriately.
> 
> Add support for detecting, obtaining and configuring phy's supported
> by a multiport controller and. Limit the max number of ports
> supported to 4 as only SC8280 which is a quad port controller supports
> Multiport currently.
> 
> Co-developed-by: Harsh Agarwal <quic_harshq@quicinc.com>
> Signed-off-by: Harsh Agarwal <quic_harshq@quicinc.com>
> Co-developed-by:Krishna Kurapati <quic_kriskura@quicinc.com>
> Signed-off-by: Krishna Kurapati <quic_kriskura@quicinc.com>
> ---
>  drivers/usb/dwc3/core.c | 252 +++++++++++++++++++++++++++-------------
>  drivers/usb/dwc3/core.h |  11 +-
>  drivers/usb/dwc3/drd.c  |  15 ++-
>  3 files changed, 190 insertions(+), 88 deletions(-)
> 
> diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
> index 6eacf0ff90b5..31400c309bff 100644
> --- a/drivers/usb/dwc3/core.c
> +++ b/drivers/usb/dwc3/core.c
> @@ -124,6 +124,7 @@ static void __dwc3_set_mode(struct work_struct *work)
>  	int ret;
>  	u32 reg;
>  	u32 desired_dr_role;
> +	int i;
>  
>  	mutex_lock(&dwc->mutex);
>  	spin_lock_irqsave(&dwc->lock, flags);
> @@ -201,8 +202,10 @@ static void __dwc3_set_mode(struct work_struct *work)
>  		} else {
>  			if (dwc->usb2_phy)
>  				otg_set_vbus(dwc->usb2_phy->otg, true);
> -			phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_HOST);
> -			phy_set_mode(dwc->usb3_generic_phy, PHY_MODE_USB_HOST);
> +			for (i = 0; i < dwc->num_usb2_ports; i++) {
> +				phy_set_mode(dwc->usb2_generic_phy[i], PHY_MODE_USB_HOST);
> +				phy_set_mode(dwc->usb3_generic_phy[i], PHY_MODE_USB_HOST);
> +			}
>  			if (dwc->dis_split_quirk) {
>  				reg = dwc3_readl(dwc->regs, DWC3_GUCTL3);
>  				reg |= DWC3_GUCTL3_SPLITDISABLE;
> @@ -217,8 +220,8 @@ static void __dwc3_set_mode(struct work_struct *work)
>  
>  		if (dwc->usb2_phy)
>  			otg_set_vbus(dwc->usb2_phy->otg, false);
> -		phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_DEVICE);
> -		phy_set_mode(dwc->usb3_generic_phy, PHY_MODE_USB_DEVICE);
> +		phy_set_mode(dwc->usb2_generic_phy[0], PHY_MODE_USB_DEVICE);
> +		phy_set_mode(dwc->usb3_generic_phy[0], PHY_MODE_USB_DEVICE);
>  
>  		ret = dwc3_gadget_init(dwc);
>  		if (ret)
> @@ -589,22 +592,14 @@ static int dwc3_core_ulpi_init(struct dwc3 *dwc)
>  	return ret;
>  }
>  
> -/**
> - * dwc3_phy_setup - Configure USB PHY Interface of DWC3 Core
> - * @dwc: Pointer to our controller context structure
> - *
> - * Returns 0 on success. The USB PHY interfaces are configured but not
> - * initialized. The PHY interfaces and the PHYs get initialized together with
> - * the core in dwc3_core_init.
> - */
> -static int dwc3_phy_setup(struct dwc3 *dwc)
> +static int dwc3_ss_phy_setup(struct dwc3 *dwc, int index)
>  {
>  	unsigned int hw_mode;
>  	u32 reg;
>  
>  	hw_mode = DWC3_GHWPARAMS0_MODE(dwc->hwparams.hwparams0);
>  
> -	reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0));
> +	reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(index));
>  
>  	/*
>  	 * Make sure UX_EXIT_PX is cleared as that causes issues with some
> @@ -659,9 +654,19 @@ static int dwc3_phy_setup(struct dwc3 *dwc)
>  	if (dwc->dis_del_phy_power_chg_quirk)
>  		reg &= ~DWC3_GUSB3PIPECTL_DEPOCHANGE;
>  
> -	dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);
> +	dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(index), reg);
>  
> -	reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
> +	return 0;
> +}
> +
> +static int dwc3_hs_phy_setup(struct dwc3 *dwc, int index)
> +{
> +	unsigned int hw_mode;
> +	u32 reg;
> +
> +	hw_mode = DWC3_GHWPARAMS0_MODE(dwc->hwparams.hwparams0);
> +
> +	reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(index));
>  
>  	/* Select the HS PHY interface */
>  	switch (DWC3_GHWPARAMS3_HSPHY_IFC(dwc->hwparams.hwparams3)) {
> @@ -673,7 +678,7 @@ static int dwc3_phy_setup(struct dwc3 *dwc)
>  		} else if (dwc->hsphy_interface &&
>  				!strncmp(dwc->hsphy_interface, "ulpi", 4)) {
>  			reg |= DWC3_GUSB2PHYCFG_ULPI_UTMI;
> -			dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
> +			dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(index), reg);
>  		} else {
>  			/* Relying on default value. */
>  			if (!(reg & DWC3_GUSB2PHYCFG_ULPI_UTMI))
> @@ -740,7 +745,35 @@ static int dwc3_phy_setup(struct dwc3 *dwc)
>  	if (dwc->ulpi_ext_vbus_drv)
>  		reg |= DWC3_GUSB2PHYCFG_ULPIEXTVBUSDRV;
>  
> -	dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
> +	dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(index), reg);
> +
> +	return 0;
> +}
> +
> +/**
> + * dwc3_phy_setup - Configure USB PHY Interface of DWC3 Core
> + * @dwc: Pointer to our controller context structure
> + *
> + * Returns 0 on success. The USB PHY interfaces are configured but not
> + * initialized. The PHY interfaces and the PHYs get initialized together with
> + * the core in dwc3_core_init.
> + */
> +static int dwc3_phy_setup(struct dwc3 *dwc)
> +{
> +	int i;
> +	int ret;
> +
> +	for (i = 0; i < dwc->num_usb3_ports; i++) {
> +		ret = dwc3_ss_phy_setup(dwc, i);
> +		if (ret)
> +			return ret;
> +	}
> +
> +	for (i = 0; i < dwc->num_usb2_ports; i++) {
> +		ret = dwc3_hs_phy_setup(dwc, i);
> +		if (ret)
> +			return ret;
> +	}
>  
>  	return 0;
>  }
> @@ -748,23 +781,32 @@ static int dwc3_phy_setup(struct dwc3 *dwc)
>  static int dwc3_phy_init(struct dwc3 *dwc)
>  {
>  	int ret;
> +	int i;
> +	int j;
>  
>  	usb_phy_init(dwc->usb2_phy);
>  	usb_phy_init(dwc->usb3_phy);
>  
> -	ret = phy_init(dwc->usb2_generic_phy);
> -	if (ret < 0)
> -		goto err_shutdown_usb3_phy;
> +	for (i = 0; i < dwc->num_usb2_ports; i++) {
> +		ret = phy_init(dwc->usb2_generic_phy[i]);
> +		if (ret < 0)
> +			goto err_exit_phy;
>  
> -	ret = phy_init(dwc->usb3_generic_phy);
> -	if (ret < 0)
> -		goto err_exit_usb2_phy;
> +		ret = phy_init(dwc->usb3_generic_phy[i]);
> +		if (ret < 0) {
> +			phy_exit(dwc->usb2_generic_phy[i]);
> +			goto err_exit_phy;
> +		}
> +	}
>  
>  	return 0;
>  
> -err_exit_usb2_phy:
> -	phy_exit(dwc->usb2_generic_phy);
> -err_shutdown_usb3_phy:
> +err_exit_phy:
> +	for (j = i - 1; j >= 0; j--) {
> +		phy_exit(dwc->usb2_generic_phy[j]);
> +		phy_exit(dwc->usb3_generic_phy[j]);
> +	}
> +
>  	usb_phy_shutdown(dwc->usb3_phy);
>  	usb_phy_shutdown(dwc->usb2_phy);
>  
> @@ -773,8 +815,12 @@ static int dwc3_phy_init(struct dwc3 *dwc)
>  
>  static void dwc3_phy_exit(struct dwc3 *dwc)
>  {
> -	phy_exit(dwc->usb3_generic_phy);
> -	phy_exit(dwc->usb2_generic_phy);
> +	int i;
> +
> +	for (i = 0; i < dwc->num_usb2_ports; i++) {
> +		phy_exit(dwc->usb3_generic_phy[i]);
> +		phy_exit(dwc->usb2_generic_phy[i]);
> +	}
>  
>  	usb_phy_shutdown(dwc->usb3_phy);
>  	usb_phy_shutdown(dwc->usb2_phy);
> @@ -783,23 +829,32 @@ static void dwc3_phy_exit(struct dwc3 *dwc)
>  static int dwc3_phy_power_on(struct dwc3 *dwc)
>  {
>  	int ret;
> +	int i;
> +	int j;
>  
>  	usb_phy_set_suspend(dwc->usb2_phy, 0);
>  	usb_phy_set_suspend(dwc->usb3_phy, 0);
>  
> -	ret = phy_power_on(dwc->usb2_generic_phy);
> -	if (ret < 0)
> -		goto err_suspend_usb3_phy;
> +	for (i = 0; i < dwc->num_usb2_ports; i++) {
> +		ret = phy_power_on(dwc->usb2_generic_phy[i]);
> +		if (ret < 0)
> +			goto err_power_off_phy;
>  
> -	ret = phy_power_on(dwc->usb3_generic_phy);
> -	if (ret < 0)
> -		goto err_power_off_usb2_phy;
> +		ret = phy_power_on(dwc->usb3_generic_phy[i]);
> +		if (ret < 0) {
> +			phy_power_off(dwc->usb2_generic_phy[i]);
> +			goto err_power_off_phy;
> +		}
> +	}
>  
>  	return 0;
>  
> -err_power_off_usb2_phy:
> -	phy_power_off(dwc->usb2_generic_phy);
> -err_suspend_usb3_phy:
> +err_power_off_phy:
> +	for (j = i - 1; j >= 0; j--) {
> +		phy_power_off(dwc->usb2_generic_phy[j]);
> +		phy_power_off(dwc->usb3_generic_phy[j]);
> +	}
> +
>  	usb_phy_set_suspend(dwc->usb3_phy, 1);
>  	usb_phy_set_suspend(dwc->usb2_phy, 1);
>  
> @@ -808,8 +863,12 @@ static int dwc3_phy_power_on(struct dwc3 *dwc)
>  
>  static void dwc3_phy_power_off(struct dwc3 *dwc)
>  {
> -	phy_power_off(dwc->usb3_generic_phy);
> -	phy_power_off(dwc->usb2_generic_phy);
> +	int i;
> +
> +	for (i = 0; i < dwc->num_usb2_ports; i++) {
> +		phy_power_off(dwc->usb3_generic_phy[i]);
> +		phy_power_off(dwc->usb2_generic_phy[i]);
> +	}
>  
>  	usb_phy_set_suspend(dwc->usb3_phy, 1);
>  	usb_phy_set_suspend(dwc->usb2_phy, 1);
> @@ -1082,6 +1141,7 @@ static int dwc3_core_init(struct dwc3 *dwc)
>  	unsigned int		hw_mode;
>  	u32			reg;
>  	int			ret;
> +	int			i;
>  
>  	hw_mode = DWC3_GHWPARAMS0_MODE(dwc->hwparams.hwparams0);
>  
> @@ -1125,15 +1185,19 @@ static int dwc3_core_init(struct dwc3 *dwc)
>  	if (hw_mode == DWC3_GHWPARAMS0_MODE_DRD &&
>  	    !DWC3_VER_IS_WITHIN(DWC3, ANY, 194A)) {
>  		if (!dwc->dis_u3_susphy_quirk) {
> -			reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0));
> -			reg |= DWC3_GUSB3PIPECTL_SUSPHY;
> -			dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);
> +			for (i = 0; i < dwc->num_usb3_ports; i++) {
> +				reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(i));
> +				reg |= DWC3_GUSB3PIPECTL_SUSPHY;
> +				dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(i), reg);
> +			}
>  		}
>  
>  		if (!dwc->dis_u2_susphy_quirk) {
> -			reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
> -			reg |= DWC3_GUSB2PHYCFG_SUSPHY;
> -			dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
> +			for (i = 0; i < dwc->num_usb2_ports; i++) {
> +				reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(i));
> +				reg |= DWC3_GUSB2PHYCFG_SUSPHY;
> +				dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(i), reg);
> +			}
>  		}
>  	}
>  
> @@ -1276,7 +1340,9 @@ static int dwc3_core_get_phy(struct dwc3 *dwc)
>  {
>  	struct device		*dev = dwc->dev;
>  	struct device_node	*node = dev->of_node;
> +	char phy_name[11];
>  	int ret;
> +	int i;
>  
>  	if (node) {
>  		dwc->usb2_phy = devm_usb_get_phy_by_phandle(dev, "usb-phy", 0);
> @@ -1302,22 +1368,36 @@ static int dwc3_core_get_phy(struct dwc3 *dwc)
>  			return dev_err_probe(dev, ret, "no usb3 phy configured\n");
>  	}
>  
> -	dwc->usb2_generic_phy = devm_phy_get(dev, "usb2-phy");
> -	if (IS_ERR(dwc->usb2_generic_phy)) {
> -		ret = PTR_ERR(dwc->usb2_generic_phy);
> -		if (ret == -ENOSYS || ret == -ENODEV)
> -			dwc->usb2_generic_phy = NULL;
> +	for (i = 0; i < dwc->num_usb2_ports; i++) {
> +		if (dwc->num_usb2_ports == 1)
> +			sprintf(phy_name, "usb2-phy");
>  		else
> -			return dev_err_probe(dev, ret, "no usb2 phy configured\n");
> -	}
> +			sprintf(phy_name, "usb2-port%d", i);
>  
> -	dwc->usb3_generic_phy = devm_phy_get(dev, "usb3-phy");
> -	if (IS_ERR(dwc->usb3_generic_phy)) {
> -		ret = PTR_ERR(dwc->usb3_generic_phy);
> -		if (ret == -ENOSYS || ret == -ENODEV)
> -			dwc->usb3_generic_phy = NULL;
> +		dwc->usb2_generic_phy[i] = devm_phy_get(dev, phy_name);
> +		if (IS_ERR(dwc->usb2_generic_phy[i])) {
> +			ret = PTR_ERR(dwc->usb2_generic_phy[i]);
> +			if (ret == -ENOSYS || ret == -ENODEV)
> +				dwc->usb2_generic_phy[i] = NULL;
> +			else
> +				return dev_err_probe(dev, ret,
> +					"failed to lookup phy %s\n", phy_name);
> +		}
> +
> +		if (dwc->num_usb2_ports == 1)
> +			sprintf(phy_name, "usb3-phy");
>  		else
> -			return dev_err_probe(dev, ret, "no usb3 phy configured\n");
> +			sprintf(phy_name, "usb3-port%d", i);
> +
> +		dwc->usb3_generic_phy[i] = devm_phy_get(dev, phy_name);
> +		if (IS_ERR(dwc->usb3_generic_phy[i])) {
> +			ret = PTR_ERR(dwc->usb3_generic_phy[i]);
> +			if (ret == -ENOSYS || ret == -ENODEV)
> +				dwc->usb3_generic_phy[i] = NULL;
> +			else
> +				return dev_err_probe(dev, ret,
> +					"failed to lookup phy %s\n", phy_name);
> +		}
>  	}
>  
>  	return 0;
> @@ -1327,6 +1407,7 @@ static int dwc3_core_init_mode(struct dwc3 *dwc)
>  {
>  	struct device *dev = dwc->dev;
>  	int ret;
> +	int i;
>  
>  	switch (dwc->dr_mode) {
>  	case USB_DR_MODE_PERIPHERAL:
> @@ -1334,8 +1415,8 @@ static int dwc3_core_init_mode(struct dwc3 *dwc)
>  
>  		if (dwc->usb2_phy)
>  			otg_set_vbus(dwc->usb2_phy->otg, false);
> -		phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_DEVICE);
> -		phy_set_mode(dwc->usb3_generic_phy, PHY_MODE_USB_DEVICE);
> +		phy_set_mode(dwc->usb2_generic_phy[0], PHY_MODE_USB_DEVICE);
> +		phy_set_mode(dwc->usb3_generic_phy[0], PHY_MODE_USB_DEVICE);
>  
>  		ret = dwc3_gadget_init(dwc);
>  		if (ret)
> @@ -1346,8 +1427,10 @@ static int dwc3_core_init_mode(struct dwc3 *dwc)
>  
>  		if (dwc->usb2_phy)
>  			otg_set_vbus(dwc->usb2_phy->otg, true);
> -		phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_HOST);
> -		phy_set_mode(dwc->usb3_generic_phy, PHY_MODE_USB_HOST);
> +		for (i = 0; i < dwc->num_usb2_ports; i++) {
> +			phy_set_mode(dwc->usb2_generic_phy[i], PHY_MODE_USB_HOST);
> +			phy_set_mode(dwc->usb3_generic_phy[i], PHY_MODE_USB_HOST);
> +		}
>  
>  		ret = dwc3_host_init(dwc);
>  		if (ret)
> @@ -1804,9 +1887,12 @@ static int dwc3_read_port_info(struct dwc3 *dwc)
>  
>  	dev_dbg(dwc->dev, "hs-ports: %u ss-ports: %u\n",
>  			dwc->num_usb2_ports, dwc->num_usb3_ports);
> -
>  	iounmap(base);
>  
> +	if ((dwc->num_usb2_ports > DWC3_MAX_PORTS) ||
> +		(dwc->num_usb3_ports > DWC3_MAX_PORTS))
> +		return -ENOMEM;
> +
>  	return 0;
>  }
>  
> @@ -2042,6 +2128,7 @@ static int dwc3_suspend_common(struct dwc3 *dwc, pm_message_t msg)
>  {
>  	unsigned long	flags;
>  	u32 reg;
> +	int i;
>  
>  	switch (dwc->current_dr_role) {
>  	case DWC3_GCTL_PRTCAP_DEVICE:
> @@ -2060,17 +2147,21 @@ static int dwc3_suspend_common(struct dwc3 *dwc, pm_message_t msg)
>  		/* Let controller to suspend HSPHY before PHY driver suspends */
>  		if (dwc->dis_u2_susphy_quirk ||
>  		    dwc->dis_enblslpm_quirk) {
> -			reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
> -			reg |=  DWC3_GUSB2PHYCFG_ENBLSLPM |
> -				DWC3_GUSB2PHYCFG_SUSPHY;
> -			dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
> +			for (i = 0; i < dwc->num_usb2_ports; i++) {
> +				reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(i));
> +				reg |=  DWC3_GUSB2PHYCFG_ENBLSLPM |
> +					DWC3_GUSB2PHYCFG_SUSPHY;
> +				dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(i), reg);
> +			}
>  
>  			/* Give some time for USB2 PHY to suspend */
>  			usleep_range(5000, 6000);
>  		}
>  
> -		phy_pm_runtime_put_sync(dwc->usb2_generic_phy);
> -		phy_pm_runtime_put_sync(dwc->usb3_generic_phy);
> +		for (i = 0; i < dwc->num_usb2_ports; i++) {
> +			phy_pm_runtime_put_sync(dwc->usb2_generic_phy[i]);
> +			phy_pm_runtime_put_sync(dwc->usb3_generic_phy[i]);
> +		}
>  		break;
>  	case DWC3_GCTL_PRTCAP_OTG:
>  		/* do nothing during runtime_suspend */
> @@ -2100,6 +2191,7 @@ static int dwc3_resume_common(struct dwc3 *dwc, pm_message_t msg)
>  	unsigned long	flags;
>  	int		ret;
>  	u32		reg;
> +	int		i;
>  
>  	switch (dwc->current_dr_role) {
>  	case DWC3_GCTL_PRTCAP_DEVICE:
> @@ -2119,17 +2211,21 @@ static int dwc3_resume_common(struct dwc3 *dwc, pm_message_t msg)
>  			break;
>  		}
>  		/* Restore GUSB2PHYCFG bits that were modified in suspend */
> -		reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
> -		if (dwc->dis_u2_susphy_quirk)
> -			reg &= ~DWC3_GUSB2PHYCFG_SUSPHY;
> +		 for (i = 0; i < dwc->num_usb2_ports; i++) {
> +			reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(i));
> +			if (dwc->dis_u2_susphy_quirk)
> +				reg &= ~DWC3_GUSB2PHYCFG_SUSPHY;
>  
> -		if (dwc->dis_enblslpm_quirk)
> -			reg &= ~DWC3_GUSB2PHYCFG_ENBLSLPM;
> +			if (dwc->dis_enblslpm_quirk)
> +				reg &= ~DWC3_GUSB2PHYCFG_ENBLSLPM;
>  
> -		dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
> +			dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(i), reg);
> +		}
>  
> -		phy_pm_runtime_get_sync(dwc->usb2_generic_phy);
> -		phy_pm_runtime_get_sync(dwc->usb3_generic_phy);
> +		for (i = 0; i < dwc->num_usb2_ports; i++) {
> +			phy_pm_runtime_get_sync(dwc->usb2_generic_phy[i]);
> +			phy_pm_runtime_get_sync(dwc->usb3_generic_phy[i]);
> +		}
>  		break;
>  	case DWC3_GCTL_PRTCAP_OTG:
>  		/* nothing to do on runtime_resume */
> diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
> index 5b0f2aa115d2..5521dc9ca034 100644
> --- a/drivers/usb/dwc3/core.h
> +++ b/drivers/usb/dwc3/core.h
> @@ -33,6 +33,9 @@
>  
>  #include <linux/power_supply.h>
>  
> +/* Number of ports supported by a multiport controller */
> +#define DWC3_MAX_PORTS 4
> +
>  #define DWC3_MSG_MAX	500
>  
>  /* Global constants */
> @@ -1024,8 +1027,8 @@ struct dwc3_scratchpad_array {
>   * @usb_psy: pointer to power supply interface.
>   * @usb2_phy: pointer to USB2 PHY
>   * @usb3_phy: pointer to USB3 PHY
> - * @usb2_generic_phy: pointer to USB2 PHY
> - * @usb3_generic_phy: pointer to USB3 PHY
> + * @usb2_generic_phy: pointer to array of USB2 PHY
> + * @usb3_generic_phy: pointer to array of USB3 PHY
>   * @num_usb2_ports: number of USB2 ports
>   * @num_usb3_ports: number of USB3 ports
>   * @phys_ready: flag to indicate that PHYs are ready
> @@ -1164,8 +1167,8 @@ struct dwc3 {
>  	struct usb_phy		*usb2_phy;
>  	struct usb_phy		*usb3_phy;
>  
> -	struct phy		*usb2_generic_phy;
> -	struct phy		*usb3_generic_phy;
> +	struct phy		*usb2_generic_phy[DWC3_MAX_PORTS];
> +	struct phy		*usb3_generic_phy[DWC3_MAX_PORTS];
>  
>  	u8			num_usb2_ports;
>  	u8			num_usb3_ports;
> diff --git a/drivers/usb/dwc3/drd.c b/drivers/usb/dwc3/drd.c
> index 039bf241769a..9aec41f1ad43 100644
> --- a/drivers/usb/dwc3/drd.c
> +++ b/drivers/usb/dwc3/drd.c
> @@ -331,6 +331,7 @@ void dwc3_otg_update(struct dwc3 *dwc, bool ignore_idstatus)
>  	u32 reg;
>  	int id;
>  	unsigned long flags;
> +	int i;
>  
>  	if (dwc->dr_mode != USB_DR_MODE_OTG)
>  		return;
> @@ -386,9 +387,12 @@ void dwc3_otg_update(struct dwc3 *dwc, bool ignore_idstatus)
>  		} else {
>  			if (dwc->usb2_phy)
>  				otg_set_vbus(dwc->usb2_phy->otg, true);
> -			if (dwc->usb2_generic_phy)
> -				phy_set_mode(dwc->usb2_generic_phy,
> -					     PHY_MODE_USB_HOST);
> +			for (i = 0; i < dwc->num_usb2_ports; i++) {
> +				if (dwc->usb2_generic_phy[i]) {
> +					phy_set_mode(dwc->usb2_generic_phy[i],
> +						     PHY_MODE_USB_HOST);
> +				}
> +			}
>  		}
>  		break;
>  	case DWC3_OTG_ROLE_DEVICE:
> @@ -400,9 +404,8 @@ void dwc3_otg_update(struct dwc3 *dwc, bool ignore_idstatus)
>  
>  		if (dwc->usb2_phy)
>  			otg_set_vbus(dwc->usb2_phy->otg, false);
> -		if (dwc->usb2_generic_phy)
> -			phy_set_mode(dwc->usb2_generic_phy,
> -				     PHY_MODE_USB_DEVICE);
> +		if (dwc->usb2_generic_phy[0])
> +			phy_set_mode(dwc->usb2_generic_phy[0], PHY_MODE_USB_DEVICE);
>  		ret = dwc3_gadget_init(dwc);
>  		if (ret)
>  			dev_err(dwc->dev, "failed to initialize peripheral\n");
> -- 
> 2.40.0
> 

Acked-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>

Thanks,
Thinh
diff mbox series

Patch

diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index 6eacf0ff90b5..31400c309bff 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -124,6 +124,7 @@  static void __dwc3_set_mode(struct work_struct *work)
 	int ret;
 	u32 reg;
 	u32 desired_dr_role;
+	int i;
 
 	mutex_lock(&dwc->mutex);
 	spin_lock_irqsave(&dwc->lock, flags);
@@ -201,8 +202,10 @@  static void __dwc3_set_mode(struct work_struct *work)
 		} else {
 			if (dwc->usb2_phy)
 				otg_set_vbus(dwc->usb2_phy->otg, true);
-			phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_HOST);
-			phy_set_mode(dwc->usb3_generic_phy, PHY_MODE_USB_HOST);
+			for (i = 0; i < dwc->num_usb2_ports; i++) {
+				phy_set_mode(dwc->usb2_generic_phy[i], PHY_MODE_USB_HOST);
+				phy_set_mode(dwc->usb3_generic_phy[i], PHY_MODE_USB_HOST);
+			}
 			if (dwc->dis_split_quirk) {
 				reg = dwc3_readl(dwc->regs, DWC3_GUCTL3);
 				reg |= DWC3_GUCTL3_SPLITDISABLE;
@@ -217,8 +220,8 @@  static void __dwc3_set_mode(struct work_struct *work)
 
 		if (dwc->usb2_phy)
 			otg_set_vbus(dwc->usb2_phy->otg, false);
-		phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_DEVICE);
-		phy_set_mode(dwc->usb3_generic_phy, PHY_MODE_USB_DEVICE);
+		phy_set_mode(dwc->usb2_generic_phy[0], PHY_MODE_USB_DEVICE);
+		phy_set_mode(dwc->usb3_generic_phy[0], PHY_MODE_USB_DEVICE);
 
 		ret = dwc3_gadget_init(dwc);
 		if (ret)
@@ -589,22 +592,14 @@  static int dwc3_core_ulpi_init(struct dwc3 *dwc)
 	return ret;
 }
 
-/**
- * dwc3_phy_setup - Configure USB PHY Interface of DWC3 Core
- * @dwc: Pointer to our controller context structure
- *
- * Returns 0 on success. The USB PHY interfaces are configured but not
- * initialized. The PHY interfaces and the PHYs get initialized together with
- * the core in dwc3_core_init.
- */
-static int dwc3_phy_setup(struct dwc3 *dwc)
+static int dwc3_ss_phy_setup(struct dwc3 *dwc, int index)
 {
 	unsigned int hw_mode;
 	u32 reg;
 
 	hw_mode = DWC3_GHWPARAMS0_MODE(dwc->hwparams.hwparams0);
 
-	reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0));
+	reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(index));
 
 	/*
 	 * Make sure UX_EXIT_PX is cleared as that causes issues with some
@@ -659,9 +654,19 @@  static int dwc3_phy_setup(struct dwc3 *dwc)
 	if (dwc->dis_del_phy_power_chg_quirk)
 		reg &= ~DWC3_GUSB3PIPECTL_DEPOCHANGE;
 
-	dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);
+	dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(index), reg);
 
-	reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
+	return 0;
+}
+
+static int dwc3_hs_phy_setup(struct dwc3 *dwc, int index)
+{
+	unsigned int hw_mode;
+	u32 reg;
+
+	hw_mode = DWC3_GHWPARAMS0_MODE(dwc->hwparams.hwparams0);
+
+	reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(index));
 
 	/* Select the HS PHY interface */
 	switch (DWC3_GHWPARAMS3_HSPHY_IFC(dwc->hwparams.hwparams3)) {
@@ -673,7 +678,7 @@  static int dwc3_phy_setup(struct dwc3 *dwc)
 		} else if (dwc->hsphy_interface &&
 				!strncmp(dwc->hsphy_interface, "ulpi", 4)) {
 			reg |= DWC3_GUSB2PHYCFG_ULPI_UTMI;
-			dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
+			dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(index), reg);
 		} else {
 			/* Relying on default value. */
 			if (!(reg & DWC3_GUSB2PHYCFG_ULPI_UTMI))
@@ -740,7 +745,35 @@  static int dwc3_phy_setup(struct dwc3 *dwc)
 	if (dwc->ulpi_ext_vbus_drv)
 		reg |= DWC3_GUSB2PHYCFG_ULPIEXTVBUSDRV;
 
-	dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
+	dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(index), reg);
+
+	return 0;
+}
+
+/**
+ * dwc3_phy_setup - Configure USB PHY Interface of DWC3 Core
+ * @dwc: Pointer to our controller context structure
+ *
+ * Returns 0 on success. The USB PHY interfaces are configured but not
+ * initialized. The PHY interfaces and the PHYs get initialized together with
+ * the core in dwc3_core_init.
+ */
+static int dwc3_phy_setup(struct dwc3 *dwc)
+{
+	int i;
+	int ret;
+
+	for (i = 0; i < dwc->num_usb3_ports; i++) {
+		ret = dwc3_ss_phy_setup(dwc, i);
+		if (ret)
+			return ret;
+	}
+
+	for (i = 0; i < dwc->num_usb2_ports; i++) {
+		ret = dwc3_hs_phy_setup(dwc, i);
+		if (ret)
+			return ret;
+	}
 
 	return 0;
 }
@@ -748,23 +781,32 @@  static int dwc3_phy_setup(struct dwc3 *dwc)
 static int dwc3_phy_init(struct dwc3 *dwc)
 {
 	int ret;
+	int i;
+	int j;
 
 	usb_phy_init(dwc->usb2_phy);
 	usb_phy_init(dwc->usb3_phy);
 
-	ret = phy_init(dwc->usb2_generic_phy);
-	if (ret < 0)
-		goto err_shutdown_usb3_phy;
+	for (i = 0; i < dwc->num_usb2_ports; i++) {
+		ret = phy_init(dwc->usb2_generic_phy[i]);
+		if (ret < 0)
+			goto err_exit_phy;
 
-	ret = phy_init(dwc->usb3_generic_phy);
-	if (ret < 0)
-		goto err_exit_usb2_phy;
+		ret = phy_init(dwc->usb3_generic_phy[i]);
+		if (ret < 0) {
+			phy_exit(dwc->usb2_generic_phy[i]);
+			goto err_exit_phy;
+		}
+	}
 
 	return 0;
 
-err_exit_usb2_phy:
-	phy_exit(dwc->usb2_generic_phy);
-err_shutdown_usb3_phy:
+err_exit_phy:
+	for (j = i - 1; j >= 0; j--) {
+		phy_exit(dwc->usb2_generic_phy[j]);
+		phy_exit(dwc->usb3_generic_phy[j]);
+	}
+
 	usb_phy_shutdown(dwc->usb3_phy);
 	usb_phy_shutdown(dwc->usb2_phy);
 
@@ -773,8 +815,12 @@  static int dwc3_phy_init(struct dwc3 *dwc)
 
 static void dwc3_phy_exit(struct dwc3 *dwc)
 {
-	phy_exit(dwc->usb3_generic_phy);
-	phy_exit(dwc->usb2_generic_phy);
+	int i;
+
+	for (i = 0; i < dwc->num_usb2_ports; i++) {
+		phy_exit(dwc->usb3_generic_phy[i]);
+		phy_exit(dwc->usb2_generic_phy[i]);
+	}
 
 	usb_phy_shutdown(dwc->usb3_phy);
 	usb_phy_shutdown(dwc->usb2_phy);
@@ -783,23 +829,32 @@  static void dwc3_phy_exit(struct dwc3 *dwc)
 static int dwc3_phy_power_on(struct dwc3 *dwc)
 {
 	int ret;
+	int i;
+	int j;
 
 	usb_phy_set_suspend(dwc->usb2_phy, 0);
 	usb_phy_set_suspend(dwc->usb3_phy, 0);
 
-	ret = phy_power_on(dwc->usb2_generic_phy);
-	if (ret < 0)
-		goto err_suspend_usb3_phy;
+	for (i = 0; i < dwc->num_usb2_ports; i++) {
+		ret = phy_power_on(dwc->usb2_generic_phy[i]);
+		if (ret < 0)
+			goto err_power_off_phy;
 
-	ret = phy_power_on(dwc->usb3_generic_phy);
-	if (ret < 0)
-		goto err_power_off_usb2_phy;
+		ret = phy_power_on(dwc->usb3_generic_phy[i]);
+		if (ret < 0) {
+			phy_power_off(dwc->usb2_generic_phy[i]);
+			goto err_power_off_phy;
+		}
+	}
 
 	return 0;
 
-err_power_off_usb2_phy:
-	phy_power_off(dwc->usb2_generic_phy);
-err_suspend_usb3_phy:
+err_power_off_phy:
+	for (j = i - 1; j >= 0; j--) {
+		phy_power_off(dwc->usb2_generic_phy[j]);
+		phy_power_off(dwc->usb3_generic_phy[j]);
+	}
+
 	usb_phy_set_suspend(dwc->usb3_phy, 1);
 	usb_phy_set_suspend(dwc->usb2_phy, 1);
 
@@ -808,8 +863,12 @@  static int dwc3_phy_power_on(struct dwc3 *dwc)
 
 static void dwc3_phy_power_off(struct dwc3 *dwc)
 {
-	phy_power_off(dwc->usb3_generic_phy);
-	phy_power_off(dwc->usb2_generic_phy);
+	int i;
+
+	for (i = 0; i < dwc->num_usb2_ports; i++) {
+		phy_power_off(dwc->usb3_generic_phy[i]);
+		phy_power_off(dwc->usb2_generic_phy[i]);
+	}
 
 	usb_phy_set_suspend(dwc->usb3_phy, 1);
 	usb_phy_set_suspend(dwc->usb2_phy, 1);
@@ -1082,6 +1141,7 @@  static int dwc3_core_init(struct dwc3 *dwc)
 	unsigned int		hw_mode;
 	u32			reg;
 	int			ret;
+	int			i;
 
 	hw_mode = DWC3_GHWPARAMS0_MODE(dwc->hwparams.hwparams0);
 
@@ -1125,15 +1185,19 @@  static int dwc3_core_init(struct dwc3 *dwc)
 	if (hw_mode == DWC3_GHWPARAMS0_MODE_DRD &&
 	    !DWC3_VER_IS_WITHIN(DWC3, ANY, 194A)) {
 		if (!dwc->dis_u3_susphy_quirk) {
-			reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0));
-			reg |= DWC3_GUSB3PIPECTL_SUSPHY;
-			dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);
+			for (i = 0; i < dwc->num_usb3_ports; i++) {
+				reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(i));
+				reg |= DWC3_GUSB3PIPECTL_SUSPHY;
+				dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(i), reg);
+			}
 		}
 
 		if (!dwc->dis_u2_susphy_quirk) {
-			reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
-			reg |= DWC3_GUSB2PHYCFG_SUSPHY;
-			dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
+			for (i = 0; i < dwc->num_usb2_ports; i++) {
+				reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(i));
+				reg |= DWC3_GUSB2PHYCFG_SUSPHY;
+				dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(i), reg);
+			}
 		}
 	}
 
@@ -1276,7 +1340,9 @@  static int dwc3_core_get_phy(struct dwc3 *dwc)
 {
 	struct device		*dev = dwc->dev;
 	struct device_node	*node = dev->of_node;
+	char phy_name[11];
 	int ret;
+	int i;
 
 	if (node) {
 		dwc->usb2_phy = devm_usb_get_phy_by_phandle(dev, "usb-phy", 0);
@@ -1302,22 +1368,36 @@  static int dwc3_core_get_phy(struct dwc3 *dwc)
 			return dev_err_probe(dev, ret, "no usb3 phy configured\n");
 	}
 
-	dwc->usb2_generic_phy = devm_phy_get(dev, "usb2-phy");
-	if (IS_ERR(dwc->usb2_generic_phy)) {
-		ret = PTR_ERR(dwc->usb2_generic_phy);
-		if (ret == -ENOSYS || ret == -ENODEV)
-			dwc->usb2_generic_phy = NULL;
+	for (i = 0; i < dwc->num_usb2_ports; i++) {
+		if (dwc->num_usb2_ports == 1)
+			sprintf(phy_name, "usb2-phy");
 		else
-			return dev_err_probe(dev, ret, "no usb2 phy configured\n");
-	}
+			sprintf(phy_name, "usb2-port%d", i);
 
-	dwc->usb3_generic_phy = devm_phy_get(dev, "usb3-phy");
-	if (IS_ERR(dwc->usb3_generic_phy)) {
-		ret = PTR_ERR(dwc->usb3_generic_phy);
-		if (ret == -ENOSYS || ret == -ENODEV)
-			dwc->usb3_generic_phy = NULL;
+		dwc->usb2_generic_phy[i] = devm_phy_get(dev, phy_name);
+		if (IS_ERR(dwc->usb2_generic_phy[i])) {
+			ret = PTR_ERR(dwc->usb2_generic_phy[i]);
+			if (ret == -ENOSYS || ret == -ENODEV)
+				dwc->usb2_generic_phy[i] = NULL;
+			else
+				return dev_err_probe(dev, ret,
+					"failed to lookup phy %s\n", phy_name);
+		}
+
+		if (dwc->num_usb2_ports == 1)
+			sprintf(phy_name, "usb3-phy");
 		else
-			return dev_err_probe(dev, ret, "no usb3 phy configured\n");
+			sprintf(phy_name, "usb3-port%d", i);
+
+		dwc->usb3_generic_phy[i] = devm_phy_get(dev, phy_name);
+		if (IS_ERR(dwc->usb3_generic_phy[i])) {
+			ret = PTR_ERR(dwc->usb3_generic_phy[i]);
+			if (ret == -ENOSYS || ret == -ENODEV)
+				dwc->usb3_generic_phy[i] = NULL;
+			else
+				return dev_err_probe(dev, ret,
+					"failed to lookup phy %s\n", phy_name);
+		}
 	}
 
 	return 0;
@@ -1327,6 +1407,7 @@  static int dwc3_core_init_mode(struct dwc3 *dwc)
 {
 	struct device *dev = dwc->dev;
 	int ret;
+	int i;
 
 	switch (dwc->dr_mode) {
 	case USB_DR_MODE_PERIPHERAL:
@@ -1334,8 +1415,8 @@  static int dwc3_core_init_mode(struct dwc3 *dwc)
 
 		if (dwc->usb2_phy)
 			otg_set_vbus(dwc->usb2_phy->otg, false);
-		phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_DEVICE);
-		phy_set_mode(dwc->usb3_generic_phy, PHY_MODE_USB_DEVICE);
+		phy_set_mode(dwc->usb2_generic_phy[0], PHY_MODE_USB_DEVICE);
+		phy_set_mode(dwc->usb3_generic_phy[0], PHY_MODE_USB_DEVICE);
 
 		ret = dwc3_gadget_init(dwc);
 		if (ret)
@@ -1346,8 +1427,10 @@  static int dwc3_core_init_mode(struct dwc3 *dwc)
 
 		if (dwc->usb2_phy)
 			otg_set_vbus(dwc->usb2_phy->otg, true);
-		phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_HOST);
-		phy_set_mode(dwc->usb3_generic_phy, PHY_MODE_USB_HOST);
+		for (i = 0; i < dwc->num_usb2_ports; i++) {
+			phy_set_mode(dwc->usb2_generic_phy[i], PHY_MODE_USB_HOST);
+			phy_set_mode(dwc->usb3_generic_phy[i], PHY_MODE_USB_HOST);
+		}
 
 		ret = dwc3_host_init(dwc);
 		if (ret)
@@ -1804,9 +1887,12 @@  static int dwc3_read_port_info(struct dwc3 *dwc)
 
 	dev_dbg(dwc->dev, "hs-ports: %u ss-ports: %u\n",
 			dwc->num_usb2_ports, dwc->num_usb3_ports);
-
 	iounmap(base);
 
+	if ((dwc->num_usb2_ports > DWC3_MAX_PORTS) ||
+		(dwc->num_usb3_ports > DWC3_MAX_PORTS))
+		return -ENOMEM;
+
 	return 0;
 }
 
@@ -2042,6 +2128,7 @@  static int dwc3_suspend_common(struct dwc3 *dwc, pm_message_t msg)
 {
 	unsigned long	flags;
 	u32 reg;
+	int i;
 
 	switch (dwc->current_dr_role) {
 	case DWC3_GCTL_PRTCAP_DEVICE:
@@ -2060,17 +2147,21 @@  static int dwc3_suspend_common(struct dwc3 *dwc, pm_message_t msg)
 		/* Let controller to suspend HSPHY before PHY driver suspends */
 		if (dwc->dis_u2_susphy_quirk ||
 		    dwc->dis_enblslpm_quirk) {
-			reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
-			reg |=  DWC3_GUSB2PHYCFG_ENBLSLPM |
-				DWC3_GUSB2PHYCFG_SUSPHY;
-			dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
+			for (i = 0; i < dwc->num_usb2_ports; i++) {
+				reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(i));
+				reg |=  DWC3_GUSB2PHYCFG_ENBLSLPM |
+					DWC3_GUSB2PHYCFG_SUSPHY;
+				dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(i), reg);
+			}
 
 			/* Give some time for USB2 PHY to suspend */
 			usleep_range(5000, 6000);
 		}
 
-		phy_pm_runtime_put_sync(dwc->usb2_generic_phy);
-		phy_pm_runtime_put_sync(dwc->usb3_generic_phy);
+		for (i = 0; i < dwc->num_usb2_ports; i++) {
+			phy_pm_runtime_put_sync(dwc->usb2_generic_phy[i]);
+			phy_pm_runtime_put_sync(dwc->usb3_generic_phy[i]);
+		}
 		break;
 	case DWC3_GCTL_PRTCAP_OTG:
 		/* do nothing during runtime_suspend */
@@ -2100,6 +2191,7 @@  static int dwc3_resume_common(struct dwc3 *dwc, pm_message_t msg)
 	unsigned long	flags;
 	int		ret;
 	u32		reg;
+	int		i;
 
 	switch (dwc->current_dr_role) {
 	case DWC3_GCTL_PRTCAP_DEVICE:
@@ -2119,17 +2211,21 @@  static int dwc3_resume_common(struct dwc3 *dwc, pm_message_t msg)
 			break;
 		}
 		/* Restore GUSB2PHYCFG bits that were modified in suspend */
-		reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
-		if (dwc->dis_u2_susphy_quirk)
-			reg &= ~DWC3_GUSB2PHYCFG_SUSPHY;
+		 for (i = 0; i < dwc->num_usb2_ports; i++) {
+			reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(i));
+			if (dwc->dis_u2_susphy_quirk)
+				reg &= ~DWC3_GUSB2PHYCFG_SUSPHY;
 
-		if (dwc->dis_enblslpm_quirk)
-			reg &= ~DWC3_GUSB2PHYCFG_ENBLSLPM;
+			if (dwc->dis_enblslpm_quirk)
+				reg &= ~DWC3_GUSB2PHYCFG_ENBLSLPM;
 
-		dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
+			dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(i), reg);
+		}
 
-		phy_pm_runtime_get_sync(dwc->usb2_generic_phy);
-		phy_pm_runtime_get_sync(dwc->usb3_generic_phy);
+		for (i = 0; i < dwc->num_usb2_ports; i++) {
+			phy_pm_runtime_get_sync(dwc->usb2_generic_phy[i]);
+			phy_pm_runtime_get_sync(dwc->usb3_generic_phy[i]);
+		}
 		break;
 	case DWC3_GCTL_PRTCAP_OTG:
 		/* nothing to do on runtime_resume */
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index 5b0f2aa115d2..5521dc9ca034 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -33,6 +33,9 @@ 
 
 #include <linux/power_supply.h>
 
+/* Number of ports supported by a multiport controller */
+#define DWC3_MAX_PORTS 4
+
 #define DWC3_MSG_MAX	500
 
 /* Global constants */
@@ -1024,8 +1027,8 @@  struct dwc3_scratchpad_array {
  * @usb_psy: pointer to power supply interface.
  * @usb2_phy: pointer to USB2 PHY
  * @usb3_phy: pointer to USB3 PHY
- * @usb2_generic_phy: pointer to USB2 PHY
- * @usb3_generic_phy: pointer to USB3 PHY
+ * @usb2_generic_phy: pointer to array of USB2 PHY
+ * @usb3_generic_phy: pointer to array of USB3 PHY
  * @num_usb2_ports: number of USB2 ports
  * @num_usb3_ports: number of USB3 ports
  * @phys_ready: flag to indicate that PHYs are ready
@@ -1164,8 +1167,8 @@  struct dwc3 {
 	struct usb_phy		*usb2_phy;
 	struct usb_phy		*usb3_phy;
 
-	struct phy		*usb2_generic_phy;
-	struct phy		*usb3_generic_phy;
+	struct phy		*usb2_generic_phy[DWC3_MAX_PORTS];
+	struct phy		*usb3_generic_phy[DWC3_MAX_PORTS];
 
 	u8			num_usb2_ports;
 	u8			num_usb3_ports;
diff --git a/drivers/usb/dwc3/drd.c b/drivers/usb/dwc3/drd.c
index 039bf241769a..9aec41f1ad43 100644
--- a/drivers/usb/dwc3/drd.c
+++ b/drivers/usb/dwc3/drd.c
@@ -331,6 +331,7 @@  void dwc3_otg_update(struct dwc3 *dwc, bool ignore_idstatus)
 	u32 reg;
 	int id;
 	unsigned long flags;
+	int i;
 
 	if (dwc->dr_mode != USB_DR_MODE_OTG)
 		return;
@@ -386,9 +387,12 @@  void dwc3_otg_update(struct dwc3 *dwc, bool ignore_idstatus)
 		} else {
 			if (dwc->usb2_phy)
 				otg_set_vbus(dwc->usb2_phy->otg, true);
-			if (dwc->usb2_generic_phy)
-				phy_set_mode(dwc->usb2_generic_phy,
-					     PHY_MODE_USB_HOST);
+			for (i = 0; i < dwc->num_usb2_ports; i++) {
+				if (dwc->usb2_generic_phy[i]) {
+					phy_set_mode(dwc->usb2_generic_phy[i],
+						     PHY_MODE_USB_HOST);
+				}
+			}
 		}
 		break;
 	case DWC3_OTG_ROLE_DEVICE:
@@ -400,9 +404,8 @@  void dwc3_otg_update(struct dwc3 *dwc, bool ignore_idstatus)
 
 		if (dwc->usb2_phy)
 			otg_set_vbus(dwc->usb2_phy->otg, false);
-		if (dwc->usb2_generic_phy)
-			phy_set_mode(dwc->usb2_generic_phy,
-				     PHY_MODE_USB_DEVICE);
+		if (dwc->usb2_generic_phy[0])
+			phy_set_mode(dwc->usb2_generic_phy[0], PHY_MODE_USB_DEVICE);
 		ret = dwc3_gadget_init(dwc);
 		if (ret)
 			dev_err(dwc->dev, "failed to initialize peripheral\n");