Bluetooth: hci_uart: Add Intel/AG6xx support
This driver implements support for iBT2.1 Bluetooth controller embedded in the AG620 communication combo. The controller needs to be configured with bddata and can be patched with a binary patch file (pbn). These operations are performed in manufacturing mode. Signed-off-by: Loic Poulain <loic.poulain@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Loic Poulain
Marcel Holtmann
parent
4c23d87457
commit
395174bb07
|
|
@ -169,6 +169,17 @@ config BT_HCIUART_QCA
|
|||
|
||||
Say Y here to compile support for QCA protocol.
|
||||
|
||||
config BT_HCIUART_AG6XX
|
||||
bool "Intel AG6XX protocol support"
|
||||
depends on BT_HCIUART
|
||||
select BT_HCIUART_H4
|
||||
select BT_INTEL
|
||||
help
|
||||
The Intel/AG6XX protocol support enables Bluetooth HCI over serial
|
||||
port interface for Intel ibt 2.1 Bluetooth controllers.
|
||||
|
||||
Say Y here to compile support for Intel AG6XX protocol.
|
||||
|
||||
config BT_HCIBCM203X
|
||||
tristate "HCI BCM203x USB driver"
|
||||
depends on USB
|
||||
|
|
|
|||
|
|
@ -36,6 +36,7 @@ hci_uart-$(CONFIG_BT_HCIUART_3WIRE) += hci_h5.o
|
|||
hci_uart-$(CONFIG_BT_HCIUART_INTEL) += hci_intel.o
|
||||
hci_uart-$(CONFIG_BT_HCIUART_BCM) += hci_bcm.o
|
||||
hci_uart-$(CONFIG_BT_HCIUART_QCA) += hci_qca.o
|
||||
hci_uart-$(CONFIG_BT_HCIUART_AG6XX) += hci_ag6xx.o
|
||||
hci_uart-objs := $(hci_uart-y)
|
||||
|
||||
ccflags-y += -D__CHECK_ENDIAN__
|
||||
|
|
|
|||
326
drivers/bluetooth/hci_ag6xx.c
Normal file
326
drivers/bluetooth/hci_ag6xx.c
Normal file
|
|
@ -0,0 +1,326 @@
|
|||
/*
|
||||
*
|
||||
* Bluetooth HCI UART driver for Intel/AG6xx devices
|
||||
*
|
||||
* Copyright (C) 2016 Intel Corporation
|
||||
*
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
*
|
||||
*/
|
||||
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/errno.h>
|
||||
#include <linux/skbuff.h>
|
||||
#include <linux/firmware.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/tty.h>
|
||||
|
||||
#include <net/bluetooth/bluetooth.h>
|
||||
#include <net/bluetooth/hci_core.h>
|
||||
|
||||
#include "hci_uart.h"
|
||||
#include "btintel.h"
|
||||
|
||||
struct ag6xx_data {
|
||||
struct sk_buff *rx_skb;
|
||||
struct sk_buff_head txq;
|
||||
};
|
||||
|
||||
struct pbn_entry {
|
||||
__le32 addr;
|
||||
__le32 plen;
|
||||
__u8 data[0];
|
||||
} __packed;
|
||||
|
||||
static int ag6xx_open(struct hci_uart *hu)
|
||||
{
|
||||
struct ag6xx_data *ag6xx;
|
||||
|
||||
BT_DBG("hu %p", hu);
|
||||
|
||||
ag6xx = kzalloc(sizeof(*ag6xx), GFP_KERNEL);
|
||||
if (!ag6xx)
|
||||
return -ENOMEM;
|
||||
|
||||
skb_queue_head_init(&ag6xx->txq);
|
||||
|
||||
hu->priv = ag6xx;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int ag6xx_close(struct hci_uart *hu)
|
||||
{
|
||||
struct ag6xx_data *ag6xx = hu->priv;
|
||||
|
||||
BT_DBG("hu %p", hu);
|
||||
|
||||
skb_queue_purge(&ag6xx->txq);
|
||||
kfree_skb(ag6xx->rx_skb);
|
||||
kfree(ag6xx);
|
||||
|
||||
hu->priv = NULL;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int ag6xx_flush(struct hci_uart *hu)
|
||||
{
|
||||
struct ag6xx_data *ag6xx = hu->priv;
|
||||
|
||||
BT_DBG("hu %p", hu);
|
||||
|
||||
skb_queue_purge(&ag6xx->txq);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct sk_buff *ag6xx_dequeue(struct hci_uart *hu)
|
||||
{
|
||||
struct ag6xx_data *ag6xx = hu->priv;
|
||||
struct sk_buff *skb;
|
||||
|
||||
skb = skb_dequeue(&ag6xx->txq);
|
||||
if (!skb)
|
||||
return skb;
|
||||
|
||||
/* Prepend skb with frame type */
|
||||
memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1);
|
||||
return skb;
|
||||
}
|
||||
|
||||
static int ag6xx_enqueue(struct hci_uart *hu, struct sk_buff *skb)
|
||||
{
|
||||
struct ag6xx_data *ag6xx = hu->priv;
|
||||
|
||||
skb_queue_tail(&ag6xx->txq, skb);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct h4_recv_pkt ag6xx_recv_pkts[] = {
|
||||
{ H4_RECV_ACL, .recv = hci_recv_frame },
|
||||
{ H4_RECV_SCO, .recv = hci_recv_frame },
|
||||
{ H4_RECV_EVENT, .recv = hci_recv_frame },
|
||||
};
|
||||
|
||||
static int ag6xx_recv(struct hci_uart *hu, const void *data, int count)
|
||||
{
|
||||
struct ag6xx_data *ag6xx = hu->priv;
|
||||
|
||||
if (!test_bit(HCI_UART_REGISTERED, &hu->flags))
|
||||
return -EUNATCH;
|
||||
|
||||
ag6xx->rx_skb = h4_recv_buf(hu->hdev, ag6xx->rx_skb, data, count,
|
||||
ag6xx_recv_pkts,
|
||||
ARRAY_SIZE(ag6xx_recv_pkts));
|
||||
if (IS_ERR(ag6xx->rx_skb)) {
|
||||
int err = PTR_ERR(ag6xx->rx_skb);
|
||||
bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err);
|
||||
ag6xx->rx_skb = NULL;
|
||||
return err;
|
||||
}
|
||||
|
||||
return count;
|
||||
}
|
||||
|
||||
static int intel_mem_write(struct hci_dev *hdev, u32 addr, u32 plen,
|
||||
const void *data)
|
||||
{
|
||||
/* Can write a maximum of 247 bytes per HCI command.
|
||||
* HCI cmd Header (3), Intel mem write header (6), data (247).
|
||||
*/
|
||||
while (plen > 0) {
|
||||
struct sk_buff *skb;
|
||||
u8 cmd_param[253], fragment_len = (plen > 247) ? 247 : plen;
|
||||
__le32 leaddr = cpu_to_le32(addr);
|
||||
|
||||
memcpy(cmd_param, &leaddr, 4);
|
||||
cmd_param[4] = 0;
|
||||
cmd_param[5] = fragment_len;
|
||||
memcpy(cmd_param + 6, data, fragment_len);
|
||||
|
||||
skb = __hci_cmd_sync(hdev, 0xfc8e, fragment_len + 6, cmd_param,
|
||||
HCI_INIT_TIMEOUT);
|
||||
if (IS_ERR(skb))
|
||||
return PTR_ERR(skb);
|
||||
kfree_skb(skb);
|
||||
|
||||
plen -= fragment_len;
|
||||
data += fragment_len;
|
||||
addr += fragment_len;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int ag6xx_setup(struct hci_uart *hu)
|
||||
{
|
||||
struct hci_dev *hdev = hu->hdev;
|
||||
struct sk_buff *skb;
|
||||
struct intel_version ver;
|
||||
const struct firmware *fw;
|
||||
const u8 *fw_ptr;
|
||||
char fwname[64];
|
||||
bool patched = false;
|
||||
int err;
|
||||
|
||||
err = btintel_enter_mfg(hdev);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
err = btintel_read_version(hdev, &ver);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
btintel_version_info(hdev, &ver);
|
||||
|
||||
/* The hardware platform number has a fixed value of 0x37 and
|
||||
* for now only accept this single value.
|
||||
*/
|
||||
if (ver.hw_platform != 0x37) {
|
||||
bt_dev_err(hdev, "Unsupported Intel hardware platform: 0x%X",
|
||||
ver.hw_platform);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
/* Only the hardware variant iBT 2.1 (AG6XX) is supported by this
|
||||
* firmware setup method.
|
||||
*/
|
||||
if (ver.hw_variant != 0x0a) {
|
||||
bt_dev_err(hdev, "Unsupported Intel hardware variant: 0x%x",
|
||||
ver.hw_variant);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
snprintf(fwname, sizeof(fwname), "intel/ibt-hw-%x.%x.bddata",
|
||||
ver.hw_platform, ver.hw_variant);
|
||||
|
||||
err = request_firmware(&fw, fwname, &hdev->dev);
|
||||
if (err < 0) {
|
||||
bt_dev_err(hdev, "Failed to open Intel bddata file: %s (%d)",
|
||||
fwname, err);
|
||||
goto patch;
|
||||
}
|
||||
fw_ptr = fw->data;
|
||||
|
||||
bt_dev_info(hdev, "Applying bddata (%s)", fwname);
|
||||
|
||||
skb = __hci_cmd_sync_ev(hdev, 0xfc2f, fw->size, fw->data,
|
||||
HCI_EV_CMD_STATUS, HCI_CMD_TIMEOUT);
|
||||
if (IS_ERR(skb)) {
|
||||
bt_dev_err(hdev, "Applying bddata failed (%ld)", PTR_ERR(skb));
|
||||
release_firmware(fw);
|
||||
return PTR_ERR(skb);
|
||||
}
|
||||
kfree_skb(skb);
|
||||
|
||||
release_firmware(fw);
|
||||
|
||||
patch:
|
||||
/* If there is no applied patch, fw_patch_num is always 0x00. In other
|
||||
* cases, current firmware is already patched. No need to patch it.
|
||||
*/
|
||||
if (ver.fw_patch_num) {
|
||||
bt_dev_info(hdev, "Device is already patched. patch num: %02x",
|
||||
ver.fw_patch_num);
|
||||
patched = true;
|
||||
goto complete;
|
||||
}
|
||||
|
||||
snprintf(fwname, sizeof(fwname),
|
||||
"intel/ibt-hw-%x.%x.%x-fw-%x.%x.%x.%x.%x.pbn",
|
||||
ver.hw_platform, ver.hw_variant, ver.hw_revision,
|
||||
ver.fw_variant, ver.fw_revision, ver.fw_build_num,
|
||||
ver.fw_build_ww, ver.fw_build_yy);
|
||||
|
||||
err = request_firmware(&fw, fwname, &hdev->dev);
|
||||
if (err < 0) {
|
||||
bt_dev_err(hdev, "Failed to open Intel patch file: %s(%d)",
|
||||
fwname, err);
|
||||
goto complete;
|
||||
}
|
||||
fw_ptr = fw->data;
|
||||
|
||||
bt_dev_info(hdev, "Patching firmware file (%s)", fwname);
|
||||
|
||||
/* PBN patch file contains a list of binary patches to be applied on top
|
||||
* of the embedded firmware. Each patch entry header contains the target
|
||||
* address and patch size.
|
||||
*
|
||||
* Patch entry:
|
||||
* | addr(le) | patch_len(le) | patch_data |
|
||||
* | 4 Bytes | 4 Bytes | n Bytes |
|
||||
*
|
||||
* PBN file is terminated by a patch entry whose address is 0xffffffff.
|
||||
*/
|
||||
while (fw->size > fw_ptr - fw->data) {
|
||||
struct pbn_entry *pbn = (void *)fw_ptr;
|
||||
u32 addr, plen;
|
||||
|
||||
if (pbn->addr == 0xffffffff) {
|
||||
bt_dev_info(hdev, "Patching complete");
|
||||
patched = true;
|
||||
break;
|
||||
}
|
||||
|
||||
addr = le32_to_cpu(pbn->addr);
|
||||
plen = le32_to_cpu(pbn->plen);
|
||||
|
||||
if (fw->data + fw->size <= pbn->data + plen) {
|
||||
bt_dev_info(hdev, "Invalid patch len (%d)", plen);
|
||||
break;
|
||||
}
|
||||
|
||||
bt_dev_info(hdev, "Patching %td/%zu", (fw_ptr - fw->data),
|
||||
fw->size);
|
||||
|
||||
err = intel_mem_write(hdev, addr, plen, pbn->data);
|
||||
if (err) {
|
||||
bt_dev_err(hdev, "Patching failed");
|
||||
break;
|
||||
}
|
||||
|
||||
fw_ptr = pbn->data + plen;
|
||||
}
|
||||
|
||||
release_firmware(fw);
|
||||
|
||||
complete:
|
||||
/* Exit manufacturing mode and reset */
|
||||
err = btintel_exit_mfg(hdev, true, patched);
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
static const struct hci_uart_proto ag6xx_proto = {
|
||||
.id = HCI_UART_AG6XX,
|
||||
.name = "AG6XX",
|
||||
.manufacturer = 2,
|
||||
.open = ag6xx_open,
|
||||
.close = ag6xx_close,
|
||||
.flush = ag6xx_flush,
|
||||
.setup = ag6xx_setup,
|
||||
.recv = ag6xx_recv,
|
||||
.enqueue = ag6xx_enqueue,
|
||||
.dequeue = ag6xx_dequeue,
|
||||
};
|
||||
|
||||
int __init ag6xx_init(void)
|
||||
{
|
||||
return hci_uart_register_proto(&ag6xx_proto);
|
||||
}
|
||||
|
||||
int __exit ag6xx_deinit(void)
|
||||
{
|
||||
return hci_uart_unregister_proto(&ag6xx_proto);
|
||||
}
|
||||
|
|
@ -804,6 +804,9 @@ static int __init hci_uart_init(void)
|
|||
#ifdef CONFIG_BT_HCIUART_QCA
|
||||
qca_init();
|
||||
#endif
|
||||
#ifdef CONFIG_BT_HCIUART_AG6XX
|
||||
ag6xx_init();
|
||||
#endif
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -836,6 +839,9 @@ static void __exit hci_uart_exit(void)
|
|||
#ifdef CONFIG_BT_HCIUART_QCA
|
||||
qca_deinit();
|
||||
#endif
|
||||
#ifdef CONFIG_BT_HCIUART_AG6XX
|
||||
ag6xx_deinit();
|
||||
#endif
|
||||
|
||||
/* Release tty registration of line discipline */
|
||||
err = tty_unregister_ldisc(N_HCI);
|
||||
|
|
|
|||
|
|
@ -35,7 +35,7 @@
|
|||
#define HCIUARTGETFLAGS _IOR('U', 204, int)
|
||||
|
||||
/* UART protocols */
|
||||
#define HCI_UART_MAX_PROTO 9
|
||||
#define HCI_UART_MAX_PROTO 10
|
||||
|
||||
#define HCI_UART_H4 0
|
||||
#define HCI_UART_BCSP 1
|
||||
|
|
@ -46,6 +46,7 @@
|
|||
#define HCI_UART_INTEL 6
|
||||
#define HCI_UART_BCM 7
|
||||
#define HCI_UART_QCA 8
|
||||
#define HCI_UART_AG6XX 9
|
||||
|
||||
#define HCI_UART_RAW_DEVICE 0
|
||||
#define HCI_UART_RESET_ON_INIT 1
|
||||
|
|
@ -182,3 +183,8 @@ int bcm_deinit(void);
|
|||
int qca_init(void);
|
||||
int qca_deinit(void);
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_BT_HCIUART_AG6XX
|
||||
int ag6xx_init(void);
|
||||
int ag6xx_deinit(void);
|
||||
#endif
|
||||
|
|
|
|||
Loading…
Reference in a new issue