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Subject[PATCH 18/24] thunderbolt: Store Thunderbolt generation in the switch structure
Date
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@linux.intel.com>
Reviewed-by: Yehezkel Bernat <yehezkel.bernat@intel.com>
Reviewed-by: Michael Jamet <michael.jamet@intel.com>
---
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
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