From: Prashant Malani <pmalani@chromium.org>
To: linux-kernel@vger.kernel.org
Cc: heikki.krogerus@intel.com, enric.balletbo@collabora.com,
bleung@chromium.org, Prashant Malani <pmalani@chromium.org>,
Guenter Roeck <groeck@chromium.org>
Subject: [PATCH v3 3/4] platform/chrome: typec: Get PD_CONTROL cmd version
Date: Wed, 19 Feb 2020 16:36:30 -0800 [thread overview]
Message-ID: <20200220003631.206078-1-pmalani@chromium.org> (raw)
Query the EC to determine the version number of the PD_CONTROL
command which is supported by the EC. Also store this value in the Type
C data struct since it will be used to determine how to parse the
response to queries for port information from the EC.
Signed-off-by: Prashant Malani <pmalani@chromium.org>
---
Changes in v3:
- Moved if statement check in the end of probe() from this patch to a
previous patch.
Changes in v2:
- No changes.
drivers/platform/chrome/cros_ec_typec.c | 32 +++++++++++++++++++++++++
1 file changed, 32 insertions(+)
diff --git a/drivers/platform/chrome/cros_ec_typec.c b/drivers/platform/chrome/cros_ec_typec.c
index 6cac41f246b99f..5e025c3442bed1 100644
--- a/drivers/platform/chrome/cros_ec_typec.c
+++ b/drivers/platform/chrome/cros_ec_typec.c
@@ -21,6 +21,7 @@ struct cros_typec_data {
struct device *dev;
struct cros_ec_device *ec;
int num_ports;
+ unsigned int cmd_ver;
/* Array of ports, indexed by port number. */
struct typec_port *ports[EC_USB_PD_MAX_PORTS];
};
@@ -154,6 +155,31 @@ static int cros_typec_ec_command(struct cros_typec_data *typec,
return ret;
}
+static int cros_typec_get_cmd_version(struct cros_typec_data *typec)
+{
+ struct ec_params_get_cmd_versions_v1 req_v1;
+ struct ec_response_get_cmd_versions resp;
+ int ret;
+
+ /* We're interested in the PD control command version. */
+ req_v1.cmd = EC_CMD_USB_PD_CONTROL;
+ ret = cros_typec_ec_command(typec, 1, EC_CMD_GET_CMD_VERSIONS,
+ &req_v1, sizeof(req_v1), &resp,
+ sizeof(resp));
+ if (ret < 0)
+ return ret;
+
+ if (resp.version_mask & EC_VER_MASK(1))
+ typec->cmd_ver = 1;
+ else
+ typec->cmd_ver = 0;
+
+ dev_dbg(typec->dev, "PD Control has version mask 0x%hhx\n",
+ typec->cmd_ver);
+
+ return 0;
+}
+
#ifdef CONFIG_ACPI
static const struct acpi_device_id cros_typec_acpi_id[] = {
{ "GOOG0014", 0 },
@@ -185,6 +211,12 @@ static int cros_typec_probe(struct platform_device *pdev)
typec->ec = dev_get_drvdata(pdev->dev.parent);
platform_set_drvdata(pdev, typec);
+ ret = cros_typec_get_cmd_version(typec);
+ if (ret < 0) {
+ dev_err(dev, "failed to get PD command version info\n");
+ return ret;
+ }
+
ret = cros_typec_ec_command(typec, 0, EC_CMD_USB_PD_PORTS, NULL, 0,
&resp, sizeof(resp));
if (ret < 0)
--
2.25.0.265.gbab2e86ba0-goog
next reply other threads:[~2020-02-20 0:36 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-20 0:36 Prashant Malani [this message]
2020-02-20 0:36 ` [PATCH v3 4/4] platform/chrome: typec: Update port info from EC Prashant Malani
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