Bluetooth: btqca: Add AR3002 rampatch support

This patch adds rampatch download compatibility for ROME >= 3.2.
Starting with ROME 3.2, the 'download mode' field of the rampatch
header indicates if the controller acknowledges (or not) the received
rampatch segments. If not, we need to send all the segments without
expecting any event from the controller (except for the last segment).
Goal is (I assume) to speed-up rampatch download.

This fixes BT on Dragonboard-600c P2 which includes the following BT
controller:

hci0: ROME Patch Version Request
hci0: Product:0x00000008
hci0: Patch  :0x00000111
hci0: ROM    :0x00000302
hci0: SOC    :0x00000023

Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

1 files changed, 49 insertions, 55 deletions

diff --git a/drivers/bluetooth/btqca.c b/drivers/bluetooth/btqca.c
index 2793d4180d2f..8219816c54a0 100644
--- a/drivers/bluetooth/btqca.c
+++ b/drivers/bluetooth/btqca.c
@@ -127,28 +127,41 @@ static void rome_tlv_check_data(struct rome_config *config,
 	BT_DBG("TLV Type\t\t : 0x%x", type_len & 0x000000ff);
 	BT_DBG("Length\t\t : %d bytes", length);
 
+	config->dnld_mode = ROME_SKIP_EVT_NONE;
+
 	switch (config->type) {
 	case TLV_TYPE_PATCH:
 		tlv_patch = (struct tlv_type_patch *)tlv->data;
-		BT_DBG("Total Length\t\t : %d bytes",
+
+		/* For Rome version 1.1 to 3.1, all segment commands
+		 * are acked by a vendor specific event (VSE).
+		 * For Rome >= 3.2, the download mode field indicates
+		 * if VSE is skipped by the controller.
+		 * In case VSE is skipped, only the last segment is acked.
+		 */
+		config->dnld_mode = tlv_patch->download_mode;
+
+		BT_DBG("Total Length           : %d bytes",
 		       le32_to_cpu(tlv_patch->total_size));
-		BT_DBG("Patch Data Length\t : %d bytes",
+		BT_DBG("Patch Data Length      : %d bytes",
 		       le32_to_cpu(tlv_patch->data_length));
 		BT_DBG("Signing Format Version : 0x%x",
 		       tlv_patch->format_version);
-		BT_DBG("Signature Algorithm\t : 0x%x",
+		BT_DBG("Signature Algorithm    : 0x%x",
 		       tlv_patch->signature);
-		BT_DBG("Reserved\t\t : 0x%x",
-		       le16_to_cpu(tlv_patch->reserved1));
-		BT_DBG("Product ID\t\t : 0x%04x",
+		BT_DBG("Download mode          : 0x%x",
+		       tlv_patch->download_mode);
+		BT_DBG("Reserved               : 0x%x",
+		       tlv_patch->reserved1);
+		BT_DBG("Product ID             : 0x%04x",
 		       le16_to_cpu(tlv_patch->product_id));
-		BT_DBG("Rom Build Version\t : 0x%04x",
+		BT_DBG("Rom Build Version      : 0x%04x",
 		       le16_to_cpu(tlv_patch->rom_build));
-		BT_DBG("Patch Version\t\t : 0x%04x",
+		BT_DBG("Patch Version          : 0x%04x",
 		       le16_to_cpu(tlv_patch->patch_version));
-		BT_DBG("Reserved\t\t : 0x%x",
+		BT_DBG("Reserved               : 0x%x",
 		       le16_to_cpu(tlv_patch->reserved2));
-		BT_DBG("Patch Entry Address\t : 0x%x",
+		BT_DBG("Patch Entry Address    : 0x%x",
 		       le32_to_cpu(tlv_patch->entry));
 		break;
 
@@ -194,8 +207,8 @@ static void rome_tlv_check_data(struct rome_config *config,
 	}
 }
 
-static int rome_tlv_send_segment(struct hci_dev *hdev, int idx, int seg_size,
-				 const u8 *data)
+static int rome_tlv_send_segment(struct hci_dev *hdev, int seg_size,
+				 const u8 *data, enum rome_tlv_dnld_mode mode)
 {
 	struct sk_buff *skb;
 	struct edl_event_hdr *edl;
@@ -203,12 +216,14 @@ static int rome_tlv_send_segment(struct hci_dev *hdev, int idx, int seg_size,
 	u8 cmd[MAX_SIZE_PER_TLV_SEGMENT + 2];
 	int err = 0;
 
-	BT_DBG("%s: Download segment #%d size %d", hdev->name, idx, seg_size);
-
 	cmd[0] = EDL_PATCH_TLV_REQ_CMD;
 	cmd[1] = seg_size;
 	memcpy(cmd + 2, data, seg_size);
 
+	if (mode == ROME_SKIP_EVT_VSE_CC || mode == ROME_SKIP_EVT_VSE)
+		return __hci_cmd_send(hdev, EDL_PATCH_CMD_OPCODE, seg_size + 2,
+				      cmd);
+
 	skb = __hci_cmd_sync_ev(hdev, EDL_PATCH_CMD_OPCODE, seg_size + 2, cmd,
 				HCI_VENDOR_PKT, HCI_INIT_TIMEOUT);
 	if (IS_ERR(skb)) {
@@ -245,47 +260,12 @@ out:
 	return err;
 }
 
-static int rome_tlv_download_request(struct hci_dev *hdev,
-				     const struct firmware *fw)
-{
-	const u8 *buffer, *data;
-	int total_segment, remain_size;
-	int ret, i;
-
-	if (!fw || !fw->data)
-		return -EINVAL;
-
-	total_segment = fw->size / MAX_SIZE_PER_TLV_SEGMENT;
-	remain_size = fw->size % MAX_SIZE_PER_TLV_SEGMENT;
-
-	BT_DBG("%s: Total segment num %d remain size %d total size %zu",
-	       hdev->name, total_segment, remain_size, fw->size);
-
-	data = fw->data;
-	for (i = 0; i < total_segment; i++) {
-		buffer = data + i * MAX_SIZE_PER_TLV_SEGMENT;
-		ret = rome_tlv_send_segment(hdev, i, MAX_SIZE_PER_TLV_SEGMENT,
-					    buffer);
-		if (ret < 0)
-			return -EIO;
-	}
-
-	if (remain_size) {
-		buffer = data + total_segment * MAX_SIZE_PER_TLV_SEGMENT;
-		ret = rome_tlv_send_segment(hdev, total_segment, remain_size,
-					    buffer);
-		if (ret < 0)
-			return -EIO;
-	}
-
-	return 0;
-}
-
 static int rome_download_firmware(struct hci_dev *hdev,
 				  struct rome_config *config)
 {
 	const struct firmware *fw;
-	int ret;
+	const u8 *segment;
+	int ret, remain, i = 0;
 
 	bt_dev_info(hdev, "ROME Downloading %s", config->fwname);
 
@@ -298,10 +278,24 @@ static int rome_download_firmware(struct hci_dev *hdev,
 
 	rome_tlv_check_data(config, fw);
 
-	ret = rome_tlv_download_request(hdev, fw);
-	if (ret) {
-		BT_ERR("%s: Failed to download file: %s (%d)", hdev->name,
-		       config->fwname, ret);
+	segment = fw->data;
+	remain = fw->size;
+	while (remain > 0) {
+		int segsize = min(MAX_SIZE_PER_TLV_SEGMENT, remain);
+
+		bt_dev_dbg(hdev, "Send segment %d, size %d", i++, segsize);
+
+		remain -= segsize;
+		/* The last segment is always acked regardless download mode */
+		if (!remain || segsize < MAX_SIZE_PER_TLV_SEGMENT)
+			config->dnld_mode = ROME_SKIP_EVT_NONE;
+
+		ret = rome_tlv_send_segment(hdev, segsize, segment,
+					    config->dnld_mode);
+		if (ret)
+			break;
+
+		segment += segsize;
 	}
 
 	release_firmware(fw);