usb: gadget: f_qc_rndis: Add RNDIS support using IPA over BAM2BAM

On some targets RNDIS function uses BAM to BAM transport, and is
handled by the f_qc_rndis driver. This change adds RNDIS support
using IPA over BAM2BAM. Also removes all different supported control
and data transports and assume BAM2BAM_IPA as default mode. RNDIS UL
changes using software path also removed as IPA supports both UL
and DL on latest products.

DPL support will be added in subsequent patches.

Change-Id: I8f7bf069523a8f3ea37e0a32a2e32830944a5c97
Signed-off-by: Chandana Kishori Chiluveru <cchiluve@codeaurora.org>

1 files changed, 27 insertions, 1 deletions

diff --git a/drivers/usb/gadget/function/rndis.c b/drivers/usb/gadget/function/rndis.c
index b0e7b65b84bd..98ac1ff58323 100644
--- a/drivers/usb/gadget/function/rndis.c
+++ b/drivers/usb/gadget/function/rndis.c
@@ -596,6 +596,7 @@ static int rndis_init_response(struct rndis_params *params,
 	resp->AFListOffset = cpu_to_le32(0);
 	resp->AFListSize = cpu_to_le32(0);
 
+	params->ul_max_xfer_size = le32_to_cpu(resp->MaxTransferSize);
 	params->resp_avail(params->v);
 	return 0;
 }
@@ -799,7 +800,7 @@ EXPORT_SYMBOL_GPL(rndis_set_host_mac);
  */
 int rndis_msg_parser(struct rndis_params *params, u8 *buf)
 {
-	u32 MsgType, MsgLength;
+	u32 MsgType, MsgLength, major, minor, max_transfer_size;
 	__le32 *tmp;
 
 	if (!buf)
@@ -822,6 +823,19 @@ int rndis_msg_parser(struct rndis_params *params, u8 *buf)
 	case RNDIS_MSG_INIT:
 		pr_debug("%s: RNDIS_MSG_INIT\n",
 			__func__);
+		major = get_unaligned_le32(tmp++);
+		minor = get_unaligned_le32(tmp++);
+		max_transfer_size = get_unaligned_le32(tmp++);
+
+		params->host_rndis_major_ver = major;
+		params->host_rndis_minor_ver = minor;
+		params->dl_max_xfer_size = max_transfer_size;
+
+		pr_debug("%s(): RNDIS Host Major:%d Minor:%d version\n",
+				__func__, major, minor);
+		pr_debug("%s(): UL Max Transfer size:%x\n", __func__,
+				max_transfer_size);
+
 		params->state = RNDIS_INITIALIZED;
 		return rndis_init_response(params, (rndis_init_msg_type *)buf);
 
@@ -1013,6 +1027,18 @@ int rndis_set_param_medium(struct rndis_params *params, u32 medium, u32 speed)
 }
 EXPORT_SYMBOL_GPL(rndis_set_param_medium);
 
+u32 rndis_get_dl_max_xfer_size(struct rndis_params *params)
+{
+	pr_debug("%s:\n", __func__);
+	return params->dl_max_xfer_size;
+}
+
+u32 rndis_get_ul_max_xfer_size(struct rndis_params *params)
+{
+	pr_debug("%s:\n", __func__);
+	return params->ul_max_xfer_size;
+}
+
 void rndis_set_max_pkt_xfer(struct rndis_params *params, u8 max_pkt_per_xfer)
 {
 	pr_debug("%s:\n", __func__);