Bluetooth: btintel: Create common function for firmware download

The firmware download flow for RAM SKU is same for both USB and UART
and this patch creates a common function for both driver.

Signed-off-by: Tedd Ho-Jeong An <tedd.an@linux.intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

4 files changed, 99 insertions, 154 deletions

diff --git a/drivers/bluetooth/btintel.c b/drivers/bluetooth/btintel.c
index da47f6dccd38..5270d5513201 100644
--- a/drivers/bluetooth/btintel.c
+++ b/drivers/bluetooth/btintel.c
@@ -24,6 +24,7 @@
 #include <linux/module.h>
 #include <linux/firmware.h>
 #include <linux/regmap.h>
+#include <asm/unaligned.h>
 
 #include <net/bluetooth/bluetooth.h>
 #include <net/bluetooth/hci_core.h>
@@ -640,6 +641,89 @@ int btintel_read_boot_params(struct hci_dev *hdev,
 }
 EXPORT_SYMBOL_GPL(btintel_read_boot_params);
 
+int btintel_download_firmware(struct hci_dev *hdev, const struct firmware *fw,
+			      u32 *boot_param)
+{
+	int err;
+	const u8 *fw_ptr;
+	u32 frag_len;
+
+	/* Start the firmware download transaction with the Init fragment
+	 * represented by the 128 bytes of CSS header.
+	 */
+	err = btintel_secure_send(hdev, 0x00, 128, fw->data);
+	if (err < 0) {
+		bt_dev_err(hdev, "Failed to send firmware header (%d)", err);
+		goto done;
+	}
+
+	/* Send the 256 bytes of public key information from the firmware
+	 * as the PKey fragment.
+	 */
+	err = btintel_secure_send(hdev, 0x03, 256, fw->data + 128);
+	if (err < 0) {
+		bt_dev_err(hdev, "Failed to send firmware pkey (%d)", err);
+		goto done;
+	}
+
+	/* Send the 256 bytes of signature information from the firmware
+	 * as the Sign fragment.
+	 */
+	err = btintel_secure_send(hdev, 0x02, 256, fw->data + 388);
+	if (err < 0) {
+		bt_dev_err(hdev, "Failed to send firmware signature (%d)", err);
+		goto done;
+	}
+
+	fw_ptr = fw->data + 644;
+	frag_len = 0;
+
+	while (fw_ptr - fw->data < fw->size) {
+		struct hci_command_hdr *cmd = (void *)(fw_ptr + frag_len);
+
+		/* Each SKU has a different reset parameter to use in the
+		 * HCI_Intel_Reset command and it is embedded in the firmware
+		 * data. So, instead of using static value per SKU, check
+		 * the firmware data and save it for later use.
+		 */
+		if (le16_to_cpu(cmd->opcode) == 0xfc0e) {
+			/* The boot parameter is the first 32-bit value
+			 * and rest of 3 octets are reserved.
+			 */
+			*boot_param = get_unaligned_le32(fw_ptr + sizeof(*cmd));
+
+			bt_dev_dbg(hdev, "boot_param=0x%x", *boot_param);
+		}
+
+		frag_len += sizeof(*cmd) + cmd->plen;
+
+		/* The parameter length of the secure send command requires
+		 * a 4 byte alignment. It happens so that the firmware file
+		 * contains proper Intel_NOP commands to align the fragments
+		 * as needed.
+		 *
+		 * Send set of commands with 4 byte alignment from the
+		 * firmware data buffer as a single Data fragement.
+		 */
+		if (!(frag_len % 4)) {
+			err = btintel_secure_send(hdev, 0x01, frag_len, fw_ptr);
+			if (err < 0) {
+				bt_dev_err(hdev,
+					   "Failed to send firmware data (%d)",
+					   err);
+				goto done;
+			}
+
+			fw_ptr += frag_len;
+			frag_len = 0;
+		}
+	}
+
+done:
+	return err;
+}
+EXPORT_SYMBOL_GPL(btintel_download_firmware);
+
 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
 MODULE_DESCRIPTION("Bluetooth support for Intel devices ver " VERSION);
 MODULE_VERSION(VERSION);
diff --git a/drivers/bluetooth/btintel.h b/drivers/bluetooth/btintel.h
index 0391e7aba03b..41c642cc523f 100644
--- a/drivers/bluetooth/btintel.h
+++ b/drivers/bluetooth/btintel.h
@@ -100,7 +100,8 @@ struct regmap *btintel_regmap_init(struct hci_dev *hdev, u16 opcode_read,
 int btintel_send_intel_reset(struct hci_dev *hdev, u32 boot_param);
 int btintel_read_boot_params(struct hci_dev *hdev,
 			     struct intel_boot_params *params);
-
+int btintel_download_firmware(struct hci_dev *dev, const struct firmware *fw,
+			      u32 *boot_param);
 #else
 
 static inline int btintel_check_bdaddr(struct hci_dev *hdev)
@@ -188,4 +189,11 @@ static inline int btintel_read_boot_params(struct hci_dev *hdev,
 {
 	return -EOPNOTSUPP;
 }
+
+static inline int btintel_download_firmware(struct hci_dev *dev,
+					    const struct firmware *fw,
+					    u32 *boot_param)
+{
+	return -EOPNOTSUPP;
+}
 #endif
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 6ea21d503eaf..2a55380ad730 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -2013,8 +2013,6 @@ static int btusb_setup_intel_new(struct hci_dev *hdev)
 	struct intel_version ver;
 	struct intel_boot_params params;
 	const struct firmware *fw;
-	const u8 *fw_ptr;
-	u32 frag_len;
 	u32 boot_param;
 	char fwname[64];
 	ktime_t calltime, delta, rettime;
@@ -2201,78 +2199,10 @@ static int btusb_setup_intel_new(struct hci_dev *hdev)
 
 	set_bit(BTUSB_DOWNLOADING, &data->flags);
 
-	/* Start the firmware download transaction with the Init fragment
-	 * represented by the 128 bytes of CSS header.
-	 */
-	err = btintel_secure_send(hdev, 0x00, 128, fw->data);
-	if (err < 0) {
-		BT_ERR("%s: Failed to send firmware header (%d)",
-		       hdev->name, err);
-		goto done;
-	}
-
-	/* Send the 256 bytes of public key information from the firmware
-	 * as the PKey fragment.
-	 */
-	err = btintel_secure_send(hdev, 0x03, 256, fw->data + 128);
-	if (err < 0) {
-		BT_ERR("%s: Failed to send firmware public key (%d)",
-		       hdev->name, err);
-		goto done;
-	}
-
-	/* Send the 256 bytes of signature information from the firmware
-	 * as the Sign fragment.
-	 */
-	err = btintel_secure_send(hdev, 0x02, 256, fw->data + 388);
-	if (err < 0) {
-		BT_ERR("%s: Failed to send firmware signature (%d)",
-		       hdev->name, err);
+	/* Start firmware downloading and get boot parameter */
+	err = btintel_download_firmware(hdev, fw, &boot_param);
+	if (err < 0)
 		goto done;
-	}
-
-	fw_ptr = fw->data + 644;
-	frag_len = 0;
-
-	while (fw_ptr - fw->data < fw->size) {
-		struct hci_command_hdr *cmd = (void *)(fw_ptr + frag_len);
-
-		/* Each SKU has a different reset parameter to use in the
-		 * HCI_Intel_Reset command and it is embedded in the firmware
-		 * data. So, instead of using static value per SKU, check
-		 * the firmware data and save it for later use.
-		 */
-		if (cmd->opcode == 0xfc0e) {
-			/* The boot parameter is the first 32-bit value
-			 * and rest of 3 octets are reserved.
-			 */
-			boot_param = get_unaligned_le32(fw_ptr + sizeof(*cmd));
-
-			bt_dev_dbg(hdev, "boot_param=0x%x", boot_param);
-		}
-
-		frag_len += sizeof(*cmd) + cmd->plen;
-
-		/* The parameter length of the secure send command requires
-		 * a 4 byte alignment. It happens so that the firmware file
-		 * contains proper Intel_NOP commands to align the fragments
-		 * as needed.
-		 *
-		 * Send set of commands with 4 byte alignment from the
-		 * firmware data buffer as a single Data fragement.
-		 */
-		if (!(frag_len % 4)) {
-			err = btintel_secure_send(hdev, 0x01, frag_len, fw_ptr);
-			if (err < 0) {
-				BT_ERR("%s: Failed to send firmware data (%d)",
-				       hdev->name, err);
-				goto done;
-			}
-
-			fw_ptr += frag_len;
-			frag_len = 0;
-		}
-	}
 
 	set_bit(BTUSB_FIRMWARE_LOADED, &data->flags);
 
diff --git a/drivers/bluetooth/hci_intel.c b/drivers/bluetooth/hci_intel.c
index cf7438512d21..7c166e3b308b 100644
--- a/drivers/bluetooth/hci_intel.c
+++ b/drivers/bluetooth/hci_intel.c
@@ -33,7 +33,6 @@
 #include <linux/acpi.h>
 #include <linux/interrupt.h>
 #include <linux/pm_runtime.h>
-#include <asm/unaligned.h>
 
 #include <net/bluetooth/bluetooth.h>
 #include <net/bluetooth/hci_core.h>
@@ -548,9 +547,7 @@ static int intel_setup(struct hci_uart *hu)
 	struct intel_boot_params params;
 	struct list_head *p;
 	const struct firmware *fw;
-	const u8 *fw_ptr;
 	char fwname[64];
-	u32 frag_len;
 	u32 boot_param;
 	ktime_t calltime, delta, rettime;
 	unsigned long long duration;
@@ -761,84 +758,10 @@ static int intel_setup(struct hci_uart *hu)
 
 	set_bit(STATE_DOWNLOADING, &intel->flags);
 
-	/* Start the firmware download transaction with the Init fragment
-	 * represented by the 128 bytes of CSS header.
-	 */
-	err = btintel_secure_send(hdev, 0x00, 128, fw->data);
-	if (err < 0) {
-		bt_dev_err(hdev, "Failed to send firmware header (%d)", err);
-		goto done;
-	}
-
-	/* Send the 256 bytes of public key information from the firmware
-	 * as the PKey fragment.
-	 */
-	err = btintel_secure_send(hdev, 0x03, 256, fw->data + 128);
-	if (err < 0) {
-		bt_dev_err(hdev, "Failed to send firmware public key (%d)",
-			   err);
-		goto done;
-	}
-
-	/* Send the 256 bytes of signature information from the firmware
-	 * as the Sign fragment.
-	 */
-	err = btintel_secure_send(hdev, 0x02, 256, fw->data + 388);
-	if (err < 0) {
-		bt_dev_err(hdev, "Failed to send firmware signature (%d)",
-			   err);
+	/* Start firmware downloading and get boot parameter */
+	err = btintel_download_firmware(hdev, fw, &boot_param);
+	if (err < 0)
 		goto done;
-	}
-
-	fw_ptr = fw->data + 644;
-	frag_len = 0;
-
-	while (fw_ptr - fw->data < fw->size) {
-		struct hci_command_hdr *cmd = (void *)(fw_ptr + frag_len);
-
-		/* Each SKU has a different reset parameter to use in the
-		 * HCI_Intel_Reset command and it is embedded in the firmware
-		 * data. So, instead of using static value per SKU, check
-		 * the firmware data and save it for later use.
-		 */
-		if (cmd->opcode == 0xfc0e) {
-			/* The boot parameter is the first 32-bit value
-			 * and rest of 3 octets are reserved.
-			 */
-			boot_param = get_unaligned_le32(fw_ptr + sizeof(*cmd));
-
-			bt_dev_dbg(hdev, "boot_param=0x%x", boot_param);
-		}
-
-		frag_len += sizeof(*cmd) + cmd->plen;
-
-		bt_dev_dbg(hdev, "Patching %td/%zu", (fw_ptr - fw->data),
-			   fw->size);
-
-		/* The parameter length of the secure send command requires
-		 * a 4 byte alignment. It happens so that the firmware file
-		 * contains proper Intel_NOP commands to align the fragments
-		 * as needed.
-		 *
-		 * Send set of commands with 4 byte alignment from the
-		 * firmware data buffer as a single Data fragement.
-		 */
-		if (frag_len % 4)
-			continue;
-
-		/* Send each command from the firmware data buffer as
-		 * a single Data fragment.
-		 */
-		err = btintel_secure_send(hdev, 0x01, frag_len, fw_ptr);
-		if (err < 0) {
-			bt_dev_err(hdev, "Failed to send firmware data (%d)",
-				   err);
-			goto done;
-		}
-
-		fw_ptr += frag_len;
-		frag_len = 0;
-	}
 
 	set_bit(STATE_FIRMWARE_LOADED, &intel->flags);