usb: gadget: Standard ECM function driver for QCOM chipsets
New function driver to support Standard ECM with adaptions to
QCOM chipsets (Data path is over SPS BAM-to-BAM).
Standard ECM function was added to android gadget.
CRs-Fixed: 358338
Change-Id: Ic1ed2f7ee7ac50601ba5dc43d06c28bffe2c5c23
Signed-off-by: Ofir Cohen <ofirc@codeaurora.org>
diff --git a/drivers/usb/gadget/android.c b/drivers/usb/gadget/android.c
index 5430e11..54c486e 100644
--- a/drivers/usb/gadget/android.c
+++ b/drivers/usb/gadget/android.c
@@ -71,6 +71,8 @@
#include "u_ether.c"
#include "u_bam_data.c"
#include "f_mbim.c"
+#include "f_qc_ecm.c"
+#include "u_qc_ether.c"
#ifdef CONFIG_TARGET_CORE
#include "f_tcm.c"
#endif
@@ -552,6 +554,95 @@
.attributes = rmnet_function_attributes,
};
+struct ecm_function_config {
+ u8 ethaddr[ETH_ALEN];
+};
+
+static int ecm_function_init(struct android_usb_function *f,
+ struct usb_composite_dev *cdev)
+{
+ f->config = kzalloc(sizeof(struct ecm_function_config), GFP_KERNEL);
+ if (!f->config)
+ return -ENOMEM;
+ return 0;
+}
+
+static void ecm_function_cleanup(struct android_usb_function *f)
+{
+ kfree(f->config);
+ f->config = NULL;
+}
+
+static int ecm_qc_function_bind_config(struct android_usb_function *f,
+ struct usb_configuration *c)
+{
+ int ret;
+ struct ecm_function_config *ecm = f->config;
+
+ if (!ecm) {
+ pr_err("%s: ecm_pdata\n", __func__);
+ return -EINVAL;
+ }
+
+ pr_info("%s MAC: %02X:%02X:%02X:%02X:%02X:%02X\n", __func__,
+ ecm->ethaddr[0], ecm->ethaddr[1], ecm->ethaddr[2],
+ ecm->ethaddr[3], ecm->ethaddr[4], ecm->ethaddr[5]);
+
+ ret = gether_qc_setup_name(c->cdev->gadget, ecm->ethaddr, "ecm");
+ if (ret) {
+ pr_err("%s: gether_setup failed\n", __func__);
+ return ret;
+ }
+
+ return ecm_qc_bind_config(c, ecm->ethaddr);
+}
+
+static void ecm_qc_function_unbind_config(struct android_usb_function *f,
+ struct usb_configuration *c)
+{
+ gether_qc_cleanup();
+}
+
+static ssize_t ecm_ethaddr_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct android_usb_function *f = dev_get_drvdata(dev);
+ struct ecm_function_config *ecm = f->config;
+ return snprintf(buf, PAGE_SIZE, "%02x:%02x:%02x:%02x:%02x:%02x\n",
+ ecm->ethaddr[0], ecm->ethaddr[1], ecm->ethaddr[2],
+ ecm->ethaddr[3], ecm->ethaddr[4], ecm->ethaddr[5]);
+}
+
+static ssize_t ecm_ethaddr_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t size)
+{
+ struct android_usb_function *f = dev_get_drvdata(dev);
+ struct ecm_function_config *ecm = f->config;
+
+ if (sscanf(buf, "%02x:%02x:%02x:%02x:%02x:%02x\n",
+ (int *)&ecm->ethaddr[0], (int *)&ecm->ethaddr[1],
+ (int *)&ecm->ethaddr[2], (int *)&ecm->ethaddr[3],
+ (int *)&ecm->ethaddr[4], (int *)&ecm->ethaddr[5]) == 6)
+ return size;
+ return -EINVAL;
+}
+
+static DEVICE_ATTR(ecm_ethaddr, S_IRUGO | S_IWUSR, ecm_ethaddr_show,
+ ecm_ethaddr_store);
+
+static struct device_attribute *ecm_function_attributes[] = {
+ &dev_attr_ecm_ethaddr,
+ NULL
+};
+
+static struct android_usb_function ecm_qc_function = {
+ .name = "ecm_qc",
+ .init = ecm_function_init,
+ .cleanup = ecm_function_cleanup,
+ .bind_config = ecm_qc_function_bind_config,
+ .unbind_config = ecm_qc_function_unbind_config,
+ .attributes = ecm_function_attributes,
+};
/* MBIM - used with BAM */
#define MAX_MBIM_INSTANCES 1
@@ -1252,6 +1343,7 @@
static struct android_usb_function *supported_functions[] = {
&mbim_function,
+ &ecm_qc_function,
&rmnet_smd_function,
&rmnet_sdio_function,
&rmnet_smd_sdio_function,