[PATCH 18/24] thunderbolt: Store Thunderbolt generation in the switch structure

[Mika Westerberg]

In some cases it is useful to know what is the Thunderbolt generation
the switch supports. This introduces a new field to struct switch that
stores the generation of the switch based on the device ID.

Signed-off-by: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>
Reviewed-by: Yehezkel Bernat <yehezkel.bernat@xxxxxxxxx>
Reviewed-by: Michael Jamet <michael.jamet@xxxxxxxxx>
---
 drivers/thunderbolt/switch.c | 24 ++++++++++++++++++++++++
 drivers/thunderbolt/tb.h     |  2 ++
 2 files changed, 26 insertions(+)

diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c
index 396e00ab7723..9c91d397d3b3 100644
--- a/drivers/thunderbolt/switch.c
+++ b/drivers/thunderbolt/switch.c
@@ -382,6 +382,28 @@ struct device_type tb_switch_type = {
 	.release = tb_switch_release,
 };
 
+static void tb_switch_set_generation(struct tb_switch *sw)
+{
+	switch (sw->config.device_id) {
+	case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_LP_BRIDGE:
+	case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_2C_BRIDGE:
+	case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_4C_BRIDGE:
+	case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_C_2C_BRIDGE:
+	case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_C_4C_BRIDGE:
+		sw->generation = 3;
+		break;
+
+	case PCI_DEVICE_ID_INTEL_FALCON_RIDGE_2C_BRIDGE:
+	case PCI_DEVICE_ID_INTEL_FALCON_RIDGE_4C_BRIDGE:
+		sw->generation = 2;
+		break;
+
+	default:
+		sw->generation = 1;
+		break;
+	}
+}
+
 /**
  * tb_switch_alloc() - allocate a switch
  * @tb: Pointer to the owning domain
@@ -442,6 +464,8 @@ struct tb_switch *tb_switch_alloc(struct tb *tb, struct device *parent,
 	}
 	sw->cap_plug_events = cap;
 
+	tb_switch_set_generation(sw);
+
 	device_initialize(&sw->dev);
 	sw->dev.parent = parent;
 	sw->dev.bus = &tb_bus_type;
diff --git a/drivers/thunderbolt/tb.h b/drivers/thunderbolt/tb.h
index 0be989069941..b3cda7605619 100644
--- a/drivers/thunderbolt/tb.h
+++ b/drivers/thunderbolt/tb.h
@@ -25,6 +25,7 @@
  * @device: Device ID of the switch
  * @vendor_name: Name of the vendor (or %NULL if not known)
  * @device_name: Name of the device (or %NULL if not known)
+ * @generation: Switch Thunderbolt generation
  * @cap_plug_events: Offset to the plug events capability (%0 if not found)
  * @is_unplugged: The switch is going away
  * @drom: DROM of the switch (%NULL if not found)
@@ -40,6 +41,7 @@ struct tb_switch {
 	u16 device;
 	const char *vendor_name;
 	const char *device_name;
+	unsigned int generation;
 	int cap_plug_events;
 	bool is_unplugged;
 	u8 *drom;
-- 
2.11.0