Commit 1c8ba6d0 authored by Marcel Holtmann's avatar Marcel Holtmann
Browse files

Bluetooth: btbcm: Add support for Broadcom controller setup 



To unify the controller setup of Broadcom devices between USB and UART
transport, add the patchram download support into the Broadcom module.

Signed-off-by: default avatarMarcel Holtmann <marcel@holtmann.org>
Signed-off-by: default avatarJohan Hedberg <johan.hedberg@intel.com>
parent 3e0ac12a

drivers/bluetooth/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -4,6 +4,7 @@ menu "Bluetooth device drivers" 


config BT_BCM

	tristate

	select FW_LOADER



config BT_HCIBTUSB

	tristate "HCI USB driver"

drivers/bluetooth/btbcm.c

+258 −0
Original line number Diff line number Diff line
@@ -22,6 +22,8 @@ 
 */



#include <linux/module.h>

#include <linux/firmware.h>

#include <asm/unaligned.h>



#include <net/bluetooth/bluetooth.h>

#include <net/bluetooth/hci_core.h>
@@ -93,6 +95,262 @@ int btbcm_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr) 
}

EXPORT_SYMBOL_GPL(btbcm_set_bdaddr);



static int btbcm_reset(struct hci_dev *hdev)

{

	struct sk_buff *skb;



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

	if (IS_ERR(skb)) {

		int err = PTR_ERR(skb);

		BT_ERR("%s: BCM: Reset failed (%d)", hdev->name, err);

		return err;

	}

	kfree_skb(skb);



	return 0;

}



static struct sk_buff *btbcm_read_local_version(struct hci_dev *hdev)

{

	struct sk_buff *skb;



	skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL,

			     HCI_INIT_TIMEOUT);

	if (IS_ERR(skb)) {

		BT_ERR("%s: BCM: Reading local version info failed (%ld)",

		       hdev->name, PTR_ERR(skb));

		return skb;

	}



	if (skb->len != sizeof(struct hci_rp_read_local_version)) {

		BT_ERR("%s: BCM: Local version length mismatch", hdev->name);

		kfree_skb(skb);

		return ERR_PTR(-EIO);

	}



	return skb;

}



static struct sk_buff *btbcm_read_verbose_config(struct hci_dev *hdev)

{

	struct sk_buff *skb;



	skb = __hci_cmd_sync(hdev, 0xfc79, 0, NULL, HCI_INIT_TIMEOUT);

	if (IS_ERR(skb)) {

		BT_ERR("%s: BCM: Read verbose config info failed (%ld)",

		       hdev->name, PTR_ERR(skb));

		return skb;

	}



	if (skb->len != 7) {

		BT_ERR("%s: BCM: Verbose config length mismatch", hdev->name);

		kfree_skb(skb);

		return ERR_PTR(-EIO);

	}



	return skb;

}



static struct sk_buff *btbcm_read_usb_product(struct hci_dev *hdev)

{

	struct sk_buff *skb;



	skb = __hci_cmd_sync(hdev, 0xfc5a, 0, NULL, HCI_INIT_TIMEOUT);

	if (IS_ERR(skb)) {

		BT_ERR("%s: BCM: Read USB product info failed (%ld)",

		       hdev->name, PTR_ERR(skb));

		return skb;

	}



	if (skb->len != 5) {

		BT_ERR("%s: BCM: USB product length mismatch", hdev->name);

		kfree_skb(skb);

		return ERR_PTR(-EIO);

	}



	return skb;

}



static const struct {

	u16 subver;

	const char *name;

} bcm_subver_table[] = {

	{ 0x210b, "BCM43142A0"	},	/* 001.001.011 */

	{ 0x2112, "BCM4314A0"	},	/* 001.001.018 */

	{ 0x2118, "BCM20702A0"	},	/* 001.001.024 */

	{ 0x2126, "BCM4335A0"	},	/* 001.001.038 */

	{ 0x220e, "BCM20702A1"	},	/* 001.002.014 */

	{ 0x230f, "BCM4354A2"	},	/* 001.003.015 */

	{ 0x4106, "BCM4335B0"	},	/* 002.001.006 */

	{ 0x410e, "BCM20702B0"	},	/* 002.001.014 */

	{ 0x6109, "BCM4335C0"	},	/* 003.001.009 */

	{ 0x610c, "BCM4354"	},	/* 003.001.012 */

	{ }

};



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;

	const char *hw_name = NULL;

	struct sk_buff *skb;

	struct hci_rp_read_local_version *ver;

	int i, err;



	/* Reset */

	err = btbcm_reset(hdev);

	if (err)

		return err;



	/* Read Local Version Info */

	skb = btbcm_read_local_version(hdev);

	if (IS_ERR(skb))

		return PTR_ERR(skb);



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

	rev = le16_to_cpu(ver->hci_rev);

	subver = le16_to_cpu(ver->lmp_subver);

	kfree_skb(skb);



	/* Read Verbose Config Version Info */

	skb = btbcm_read_verbose_config(hdev);

	if (IS_ERR(skb))

		return PTR_ERR(skb);



	BT_INFO("%s: BCM: chip id %u", hdev->name, skb->data[1]);

	kfree_skb(skb);



	/* Read USB Product Info */

	skb = btbcm_read_usb_product(hdev);

	if (IS_ERR(skb))

		return PTR_ERR(skb);



	vid = get_unaligned_le16(skb->data + 1);

	pid = get_unaligned_le16(skb->data + 3);

	kfree_skb(skb);



	for (i = 0; bcm_subver_table[i].name; i++) {

		if (subver == bcm_subver_table[i].subver) {

			hw_name = bcm_subver_table[i].name;

			break;

		}

	}



	BT_INFO("%s: %s (%3.3u.%3.3u.%3.3u) build %4.4u", hdev->name,

		hw_name ? : "BCM", (subver & 0x7000) >> 13,

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



	snprintf(fw_name, sizeof(fw_name), "brcm/%s-%4.4x-%4.4x.hcd",

		 hw_name ? : "BCM", vid, pid);



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

	if (err < 0) {

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

		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;



	/* Read Local Version Info */

	skb = btbcm_read_local_version(hdev);

	if (IS_ERR(skb)) {

		err = PTR_ERR(skb);

		goto done;

	}



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

	rev = le16_to_cpu(ver->hci_rev);

	subver = le16_to_cpu(ver->lmp_subver);

	kfree_skb(skb);



	BT_INFO("%s: %s (%3.3u.%3.3u.%3.3u) build %4.4u", hdev->name,

		hw_name ? : "BCM", (subver & 0x7000) >> 13,

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



	btbcm_check_bdaddr(hdev);



done:

	release_firmware(fw);



	return err;

}

EXPORT_SYMBOL_GPL(btbcm_setup_patchram);



int btbcm_setup_apple(struct hci_dev *hdev)

{

	struct sk_buff *skb;



	/* Read Verbose Config Version Info */

	skb = btbcm_read_verbose_config(hdev);

	if (IS_ERR(skb))

		return PTR_ERR(skb);



	BT_INFO("%s: BCM: chip id %u build %4.4u", hdev->name, skb->data[1],

		get_unaligned_le16(skb->data + 5));

	kfree_skb(skb);



	return 0;

}

EXPORT_SYMBOL_GPL(btbcm_setup_apple);



MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");

MODULE_DESCRIPTION("Bluetooth support for Broadcom devices ver " VERSION);

MODULE_VERSION(VERSION);

drivers/bluetooth/btbcm.h

+13 −0
Original line number Diff line number Diff line
@@ -26,6 +26,9 @@ 
int btbcm_check_bdaddr(struct hci_dev *hdev);

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



int btbcm_setup_patchram(struct hci_dev *hdev);

int btbcm_setup_apple(struct hci_dev *hdev);



#else



static inline int btbcm_check_bdaddr(struct hci_dev *hdev)
@@ -38,4 +41,14 @@ static inline int btbcm_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr) 
	return -EOPNOTSUPP;

}



static inline int btbcm_setup_patchram(struct hci_dev *hdev)

{

	return 0;

}



static inline int btbcm_setup_apple(struct hci_dev *hdev)

{

	return 0;

}



#endif