[PATCH v2] usb: typec: intel_pmc_mux: Update IOM port status offset for AlderLake

[PATCH v2] usb: typec: intel_pmc_mux: Update IOM port status offset for AlderLake

[Azhar Shaikh]

Intel AlderLake(ADL) IOM has a different IOM port status offset than
Intel TigerLake.
Add a new ACPI ID for ADL and use the IOM port status offset as per
the platform.

Signed-off-by: Azhar Shaikh <azhar.shaikh@intel.com>
---
Changes in v2:
- Passed acpi_device_id->id to acpi_dev_present() and
  acpi_dev_get_first_match_dev()

 drivers/usb/typec/mux/intel_pmc_mux.c | 28 ++++++++++++++++++++++-----
 1 file changed, 23 insertions(+), 5 deletions(-)

diff --git a/drivers/usb/typec/mux/intel_pmc_mux.c b/drivers/usb/typec/mux/intel_pmc_mux.c
index 46a25b8db72e..dc8689db0100 100644
--- a/drivers/usb/typec/mux/intel_pmc_mux.c
+++ b/drivers/usb/typec/mux/intel_pmc_mux.c
@@ -83,8 +83,6 @@ enum {
 /*
  * Input Output Manager (IOM) PORT STATUS
  */
-#define IOM_PORT_STATUS_OFFSET				0x560
-
 #define IOM_PORT_STATUS_ACTIVITY_TYPE_MASK		GENMASK(9, 6)
 #define IOM_PORT_STATUS_ACTIVITY_TYPE_SHIFT		6
 #define IOM_PORT_STATUS_ACTIVITY_TYPE_USB		0x03
@@ -144,6 +142,7 @@ struct pmc_usb {
 	struct pmc_usb_port *port;
 	struct acpi_device *iom_adev;
 	void __iomem *iom_base;
+	u32 iom_port_status_offset;
 };
 
 static void update_port_status(struct pmc_usb_port *port)
@@ -153,7 +152,8 @@ static void update_port_status(struct pmc_usb_port *port)
 	/* SoC expects the USB Type-C port numbers to start with 0 */
 	port_num = port->usb3_port - 1;
 
-	port->iom_status = readl(port->pmc->iom_base + IOM_PORT_STATUS_OFFSET +
+	port->iom_status = readl(port->pmc->iom_base +
+				 port->pmc->iom_port_status_offset +
 				 port_num * sizeof(u32));
 }
 
@@ -559,14 +559,32 @@ static int is_memory(struct acpi_resource *res, void *data)
 	return !acpi_dev_resource_memory(res, &r);
 }
 
+/* IOM ACPI IDs and IOM_PORT_STATUS_OFFSET */
+static const struct acpi_device_id iom_acpi_ids[] = {
+	/* TigerLake */
+	{ "INTC1072", 0x560, },
+
+	/* AlderLake */
+	{ "INTC1079", 0x160, },
+	{}
+};
+
 static int pmc_usb_probe_iom(struct pmc_usb *pmc)
 {
 	struct list_head resource_list;
 	struct resource_entry *rentry;
-	struct acpi_device *adev;
+	static const struct acpi_device_id *dev_id;
+	struct acpi_device *adev = NULL;
 	int ret;
 
-	adev = acpi_dev_get_first_match_dev("INTC1072", NULL, -1);
+	for (dev_id = &iom_acpi_ids[0]; dev_id->id[0]; dev_id++) {
+		if (acpi_dev_present(dev_id->id, NULL, -1)) {
+			pmc->iom_port_status_offset = (u32)dev_id->driver_data;
+			adev = acpi_dev_get_first_match_dev(dev_id->id, NULL, -1);
+			break;
+		}
+	}
+
 	if (!adev)
 		return -ENODEV;
 
-- 
2.17.1

Re: [PATCH v2] usb: typec: intel_pmc_mux: Update IOM port status offset for AlderLake

[Heikki Krogerus]

On Mon, May 31, 2021 at 08:58:43PM -0700, Azhar Shaikh wrote:
> Intel AlderLake(ADL) IOM has a different IOM port status offset than
> Intel TigerLake.
> Add a new ACPI ID for ADL and use the IOM port status offset as per
> the platform.
> 
> Signed-off-by: Azhar Shaikh <azhar.shaikh@intel.com>

Acked-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>

> ---
> Changes in v2:
> - Passed acpi_device_id->id to acpi_dev_present() and
>   acpi_dev_get_first_match_dev()
> 
>  drivers/usb/typec/mux/intel_pmc_mux.c | 28 ++++++++++++++++++++++-----
>  1 file changed, 23 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/usb/typec/mux/intel_pmc_mux.c b/drivers/usb/typec/mux/intel_pmc_mux.c
> index 46a25b8db72e..dc8689db0100 100644
> --- a/drivers/usb/typec/mux/intel_pmc_mux.c
> +++ b/drivers/usb/typec/mux/intel_pmc_mux.c
> @@ -83,8 +83,6 @@ enum {
>  /*
>   * Input Output Manager (IOM) PORT STATUS
>   */
> -#define IOM_PORT_STATUS_OFFSET				0x560
> -
>  #define IOM_PORT_STATUS_ACTIVITY_TYPE_MASK		GENMASK(9, 6)
>  #define IOM_PORT_STATUS_ACTIVITY_TYPE_SHIFT		6
>  #define IOM_PORT_STATUS_ACTIVITY_TYPE_USB		0x03
> @@ -144,6 +142,7 @@ struct pmc_usb {
>  	struct pmc_usb_port *port;
>  	struct acpi_device *iom_adev;
>  	void __iomem *iom_base;
> +	u32 iom_port_status_offset;
>  };
>  
>  static void update_port_status(struct pmc_usb_port *port)
> @@ -153,7 +152,8 @@ static void update_port_status(struct pmc_usb_port *port)
>  	/* SoC expects the USB Type-C port numbers to start with 0 */
>  	port_num = port->usb3_port - 1;
>  
> -	port->iom_status = readl(port->pmc->iom_base + IOM_PORT_STATUS_OFFSET +
> +	port->iom_status = readl(port->pmc->iom_base +
> +				 port->pmc->iom_port_status_offset +
>  				 port_num * sizeof(u32));
>  }
>  
> @@ -559,14 +559,32 @@ static int is_memory(struct acpi_resource *res, void *data)
>  	return !acpi_dev_resource_memory(res, &r);
>  }
>  
> +/* IOM ACPI IDs and IOM_PORT_STATUS_OFFSET */
> +static const struct acpi_device_id iom_acpi_ids[] = {
> +	/* TigerLake */
> +	{ "INTC1072", 0x560, },
> +
> +	/* AlderLake */
> +	{ "INTC1079", 0x160, },
> +	{}
> +};
> +
>  static int pmc_usb_probe_iom(struct pmc_usb *pmc)
>  {
>  	struct list_head resource_list;
>  	struct resource_entry *rentry;
> -	struct acpi_device *adev;
> +	static const struct acpi_device_id *dev_id;
> +	struct acpi_device *adev = NULL;
>  	int ret;
>  
> -	adev = acpi_dev_get_first_match_dev("INTC1072", NULL, -1);
> +	for (dev_id = &iom_acpi_ids[0]; dev_id->id[0]; dev_id++) {
> +		if (acpi_dev_present(dev_id->id, NULL, -1)) {
> +			pmc->iom_port_status_offset = (u32)dev_id->driver_data;
> +			adev = acpi_dev_get_first_match_dev(dev_id->id, NULL, -1);
> +			break;
> +		}
> +	}
> +
>  	if (!adev)
>  		return -ENODEV;
>  
> -- 
> 2.17.1

-- 
heikki