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Commit 50862ee5 authored by Marcel Holtmann's avatar Marcel Holtmann
Browse files

Bluetooth: btbcm: Export patchram download as separate function 



This isolates the Broadcom patchram download procedure as separate
function so that it can be easily used from USB and UART based drivers.

Signed-off-by: default avatarMarcel Holtmann <marcel@holtmann.org>
Signed-off-by: default avatarJohan Hedberg <johan.hedberg@intel.com>
parent 16e5c47a

drivers/bluetooth/btbcm.c

+79 −69
Original line number Diff line number Diff line
@@ -95,6 +95,78 @@ int btbcm_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr) 
}

EXPORT_SYMBOL_GPL(btbcm_set_bdaddr);



int btbcm_patchram(struct hci_dev *hdev, const char *firmware)

{

	const struct hci_command_hdr *cmd;

	const struct firmware *fw;

	const u8 *fw_ptr;

	size_t fw_size;

	struct sk_buff *skb;

	u16 opcode;

	int err;



	err = request_firmware(&fw, firmware, &hdev->dev);

	if (err < 0) {

		BT_INFO("%s: BCM: Patch %s not found", hdev->name, firmware);

		return err;

	}



	/* Start Download */

	skb = __hci_cmd_sync(hdev, 0xfc2e, 0, NULL, HCI_INIT_TIMEOUT);

	if (IS_ERR(skb)) {

		err = PTR_ERR(skb);

		BT_ERR("%s: BCM: Download Minidrv command failed (%d)",

		       hdev->name, err);

		goto done;

	}

	kfree_skb(skb);



	/* 50 msec delay after Download Minidrv completes */

	msleep(50);



	fw_ptr = fw->data;

	fw_size = fw->size;



	while (fw_size >= sizeof(*cmd)) {

		const u8 *cmd_param;



		cmd = (struct hci_command_hdr *)fw_ptr;

		fw_ptr += sizeof(*cmd);

		fw_size -= sizeof(*cmd);



		if (fw_size < cmd->plen) {

			BT_ERR("%s: BCM: Patch %s is corrupted", hdev->name,

			       firmware);

			err = -EINVAL;

			goto done;

		}



		cmd_param = fw_ptr;

		fw_ptr += cmd->plen;

		fw_size -= cmd->plen;



		opcode = le16_to_cpu(cmd->opcode);



		skb = __hci_cmd_sync(hdev, opcode, cmd->plen, cmd_param,

				     HCI_INIT_TIMEOUT);

		if (IS_ERR(skb)) {

			err = PTR_ERR(skb);

			BT_ERR("%s: BCM: Patch command %04x failed (%d)",

			       hdev->name, opcode, err);

			goto done;

		}

		kfree_skb(skb);

	}



	/* 250 msec delay after Launch Ram completes */

	msleep(250);



done:

	release_firmware(fw);

	return err;

}

EXPORT_SYMBOL(btbcm_patchram);



static int btbcm_reset(struct hci_dev *hdev)

{

	struct sk_buff *skb;
@@ -198,12 +270,8 @@ static const struct { 


int btbcm_setup_patchram(struct hci_dev *hdev)

{

	const struct hci_command_hdr *cmd;

	const struct firmware *fw;

	const u8 *fw_ptr;

	size_t fw_size;

	char fw_name[64];

	u16 opcode, subver, rev, pid, vid;

	u16 subver, rev, pid, vid;

	const char *hw_name = NULL;

	struct sk_buff *skb;

	struct hci_rp_read_local_version *ver;
@@ -273,74 +341,19 @@ int btbcm_setup_patchram(struct hci_dev *hdev) 
		hw_name ? : "BCM", (subver & 0x7000) >> 13,

		(subver & 0x1f00) >> 8, (subver & 0x00ff), rev & 0x0fff);



	err = request_firmware(&fw, fw_name, &hdev->dev);

	if (err < 0) {

		BT_INFO("%s: BCM: patch %s not found", hdev->name, fw_name);

	err = btbcm_patchram(hdev, fw_name);

	if (err == -ENOENT)

		return 0;

	}



	/* Start Download */

	skb = __hci_cmd_sync(hdev, 0xfc2e, 0, NULL, HCI_INIT_TIMEOUT);

	if (IS_ERR(skb)) {

		err = PTR_ERR(skb);

		BT_ERR("%s: BCM: Download Minidrv command failed (%d)",

		       hdev->name, err);

		goto reset;

	}

	kfree_skb(skb);



	/* 50 msec delay after Download Minidrv completes */

	msleep(50);



	fw_ptr = fw->data;

	fw_size = fw->size;



	while (fw_size >= sizeof(*cmd)) {

		const u8 *cmd_param;



		cmd = (struct hci_command_hdr *)fw_ptr;

		fw_ptr += sizeof(*cmd);

		fw_size -= sizeof(*cmd);



		if (fw_size < cmd->plen) {

			BT_ERR("%s: BCM: patch %s is corrupted", hdev->name,

			       fw_name);

			err = -EINVAL;

			goto reset;

		}



		cmd_param = fw_ptr;

		fw_ptr += cmd->plen;

		fw_size -= cmd->plen;



		opcode = le16_to_cpu(cmd->opcode);



		skb = __hci_cmd_sync(hdev, opcode, cmd->plen, cmd_param,

				     HCI_INIT_TIMEOUT);

		if (IS_ERR(skb)) {

			err = PTR_ERR(skb);

			BT_ERR("%s: BCM: patch command %04x failed (%d)",

			       hdev->name, opcode, err);

			goto reset;

		}

		kfree_skb(skb);

	}



	/* 250 msec delay after Launch Ram completes */

	msleep(250);



reset:

	/* Reset */

	err = btbcm_reset(hdev);

	if (err)

		goto done;

		return err;



	/* Read Local Version Info */

	skb = btbcm_read_local_version(hdev);

	if (IS_ERR(skb)) {

		err = PTR_ERR(skb);

		goto done;

	}

	if (IS_ERR(skb))

		return PTR_ERR(skb);



	ver = (struct hci_rp_read_local_version *)skb->data;

	rev = le16_to_cpu(ver->hci_rev);
@@ -355,10 +368,7 @@ reset: 


	set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);



done:

	release_firmware(fw);



	return err;

	return 0;

}

EXPORT_SYMBOL_GPL(btbcm_setup_patchram);

drivers/bluetooth/btbcm.h

+6 −0
Original line number Diff line number Diff line
@@ -25,6 +25,7 @@ 


int btbcm_check_bdaddr(struct hci_dev *hdev);

int btbcm_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr);

int btbcm_patchram(struct hci_dev *hdev, const char *firmware);



int btbcm_setup_patchram(struct hci_dev *hdev);

int btbcm_setup_apple(struct hci_dev *hdev);
@@ -41,6 +42,11 @@ static inline int btbcm_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr) 
	return -EOPNOTSUPP;

}



static inline int btbcm_patchram(struct hci_dev *hdev, const char *firmware)

{

	return -EOPNOTSUPP;

}



static inline int btbcm_setup_patchram(struct hci_dev *hdev)

{

	return 0;