forked from Minki/linux
Bluetooth: hci_uart: Add Marvell support
This patch introduces support for Marvell Bluetooth controller over UART (8897 for now). In order to send the final firmware at full speed, a helper firmware is firstly sent. Firmware download is driven by the controller which sends request firmware packets (including expected size). This driver is a global rework of the one proposed by Amitkumar Karwar <akarwar@marvell.com>. 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
9e69130c4e
commit
162f812f23
@ -180,6 +180,17 @@ config BT_HCIUART_AG6XX
|
||||
|
||||
Say Y here to compile support for Intel AG6XX protocol.
|
||||
|
||||
config BT_HCIUART_MRVL
|
||||
bool "Marvell protocol support"
|
||||
depends on BT_HCIUART
|
||||
select BT_HCIUART_H4
|
||||
help
|
||||
Marvell is serial protocol for communication between Bluetooth
|
||||
device and host. This protocol is required for most Marvell Bluetooth
|
||||
devices with UART interface.
|
||||
|
||||
Say Y here to compile support for HCI MRVL protocol.
|
||||
|
||||
config BT_HCIBCM203X
|
||||
tristate "HCI BCM203x USB driver"
|
||||
depends on USB
|
||||
|
||||
@ -38,6 +38,7 @@ 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-$(CONFIG_BT_HCIUART_MRVL) += hci_mrvl.o
|
||||
hci_uart-objs := $(hci_uart-y)
|
||||
|
||||
ccflags-y += -D__CHECK_ENDIAN__
|
||||
|
||||
@ -810,6 +810,9 @@ static int __init hci_uart_init(void)
|
||||
#ifdef CONFIG_BT_HCIUART_AG6XX
|
||||
ag6xx_init();
|
||||
#endif
|
||||
#ifdef CONFIG_BT_HCIUART_MRVL
|
||||
mrvl_init();
|
||||
#endif
|
||||
|
||||
return 0;
|
||||
}
|
||||
@ -845,6 +848,9 @@ static void __exit hci_uart_exit(void)
|
||||
#ifdef CONFIG_BT_HCIUART_AG6XX
|
||||
ag6xx_deinit();
|
||||
#endif
|
||||
#ifdef CONFIG_BT_HCIUART_MRVL
|
||||
mrvl_deinit();
|
||||
#endif
|
||||
|
||||
/* Release tty registration of line discipline */
|
||||
err = tty_unregister_ldisc(N_HCI);
|
||||
|
||||
387
drivers/bluetooth/hci_mrvl.c
Normal file
387
drivers/bluetooth/hci_mrvl.c
Normal file
@ -0,0 +1,387 @@
|
||||
/*
|
||||
*
|
||||
* Bluetooth HCI UART driver for marvell devices
|
||||
*
|
||||
* Copyright (C) 2016 Marvell International Ltd.
|
||||
* 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"
|
||||
|
||||
#define HCI_FW_REQ_PKT 0xA5
|
||||
#define HCI_CHIP_VER_PKT 0xAA
|
||||
|
||||
#define MRVL_ACK 0x5A
|
||||
#define MRVL_NAK 0xBF
|
||||
#define MRVL_RAW_DATA 0x1F
|
||||
|
||||
enum {
|
||||
STATE_CHIP_VER_PENDING,
|
||||
STATE_FW_REQ_PENDING,
|
||||
};
|
||||
|
||||
struct mrvl_data {
|
||||
struct sk_buff *rx_skb;
|
||||
struct sk_buff_head txq;
|
||||
struct sk_buff_head rawq;
|
||||
unsigned long flags;
|
||||
unsigned int tx_len;
|
||||
u8 id, rev;
|
||||
};
|
||||
|
||||
struct hci_mrvl_pkt {
|
||||
__le16 lhs;
|
||||
__le16 rhs;
|
||||
} __packed;
|
||||
#define HCI_MRVL_PKT_SIZE 4
|
||||
|
||||
static int mrvl_open(struct hci_uart *hu)
|
||||
{
|
||||
struct mrvl_data *mrvl;
|
||||
|
||||
BT_DBG("hu %p", hu);
|
||||
|
||||
mrvl = kzalloc(sizeof(*mrvl), GFP_KERNEL);
|
||||
if (!mrvl)
|
||||
return -ENOMEM;
|
||||
|
||||
skb_queue_head_init(&mrvl->txq);
|
||||
skb_queue_head_init(&mrvl->rawq);
|
||||
|
||||
set_bit(STATE_CHIP_VER_PENDING, &mrvl->flags);
|
||||
|
||||
hu->priv = mrvl;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int mrvl_close(struct hci_uart *hu)
|
||||
{
|
||||
struct mrvl_data *mrvl = hu->priv;
|
||||
|
||||
BT_DBG("hu %p", hu);
|
||||
|
||||
skb_queue_purge(&mrvl->txq);
|
||||
skb_queue_purge(&mrvl->rawq);
|
||||
kfree_skb(mrvl->rx_skb);
|
||||
kfree(mrvl);
|
||||
|
||||
hu->priv = NULL;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int mrvl_flush(struct hci_uart *hu)
|
||||
{
|
||||
struct mrvl_data *mrvl = hu->priv;
|
||||
|
||||
BT_DBG("hu %p", hu);
|
||||
|
||||
skb_queue_purge(&mrvl->txq);
|
||||
skb_queue_purge(&mrvl->rawq);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct sk_buff *mrvl_dequeue(struct hci_uart *hu)
|
||||
{
|
||||
struct mrvl_data *mrvl = hu->priv;
|
||||
struct sk_buff *skb;
|
||||
|
||||
skb = skb_dequeue(&mrvl->txq);
|
||||
if (!skb) {
|
||||
/* Any raw data ? */
|
||||
skb = skb_dequeue(&mrvl->rawq);
|
||||
} else {
|
||||
/* Prepend skb with frame type */
|
||||
memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1);
|
||||
}
|
||||
|
||||
return skb;
|
||||
}
|
||||
|
||||
static int mrvl_enqueue(struct hci_uart *hu, struct sk_buff *skb)
|
||||
{
|
||||
struct mrvl_data *mrvl = hu->priv;
|
||||
|
||||
skb_queue_tail(&mrvl->txq, skb);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void mrvl_send_ack(struct hci_uart *hu, unsigned char type)
|
||||
{
|
||||
struct mrvl_data *mrvl = hu->priv;
|
||||
struct sk_buff *skb;
|
||||
|
||||
/* No H4 payload, only 1 byte header */
|
||||
skb = bt_skb_alloc(0, GFP_ATOMIC);
|
||||
if (!skb) {
|
||||
bt_dev_err(hu->hdev, "Unable to alloc ack/nak packet");
|
||||
return;
|
||||
}
|
||||
hci_skb_pkt_type(skb) = type;
|
||||
|
||||
skb_queue_tail(&mrvl->txq, skb);
|
||||
hci_uart_tx_wakeup(hu);
|
||||
}
|
||||
|
||||
static int mrvl_recv_fw_req(struct hci_dev *hdev, struct sk_buff *skb)
|
||||
{
|
||||
struct hci_mrvl_pkt *pkt = (void *)skb->data;
|
||||
struct hci_uart *hu = hci_get_drvdata(hdev);
|
||||
struct mrvl_data *mrvl = hu->priv;
|
||||
int ret = 0;
|
||||
|
||||
if ((pkt->lhs ^ pkt->rhs) != 0xffff) {
|
||||
bt_dev_err(hdev, "Corrupted mrvl header");
|
||||
mrvl_send_ack(hu, MRVL_NAK);
|
||||
ret = -EINVAL;
|
||||
goto done;
|
||||
}
|
||||
mrvl_send_ack(hu, MRVL_ACK);
|
||||
|
||||
if (!test_bit(STATE_FW_REQ_PENDING, &mrvl->flags)) {
|
||||
bt_dev_err(hdev, "Received unexpected firmware request");
|
||||
ret = -EINVAL;
|
||||
goto done;
|
||||
}
|
||||
|
||||
mrvl->tx_len = le16_to_cpu(pkt->lhs);
|
||||
|
||||
clear_bit(STATE_FW_REQ_PENDING, &mrvl->flags);
|
||||
smp_mb__after_atomic();
|
||||
wake_up_bit(&mrvl->flags, STATE_FW_REQ_PENDING);
|
||||
|
||||
done:
|
||||
kfree_skb(skb);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int mrvl_recv_chip_ver(struct hci_dev *hdev, struct sk_buff *skb)
|
||||
{
|
||||
struct hci_mrvl_pkt *pkt = (void *)skb->data;
|
||||
struct hci_uart *hu = hci_get_drvdata(hdev);
|
||||
struct mrvl_data *mrvl = hu->priv;
|
||||
u16 version = le16_to_cpu(pkt->lhs);
|
||||
int ret = 0;
|
||||
|
||||
if ((pkt->lhs ^ pkt->rhs) != 0xffff) {
|
||||
bt_dev_err(hdev, "Corrupted mrvl header");
|
||||
mrvl_send_ack(hu, MRVL_NAK);
|
||||
ret = -EINVAL;
|
||||
goto done;
|
||||
}
|
||||
mrvl_send_ack(hu, MRVL_ACK);
|
||||
|
||||
if (!test_bit(STATE_CHIP_VER_PENDING, &mrvl->flags)) {
|
||||
bt_dev_err(hdev, "Received unexpected chip version");
|
||||
goto done;
|
||||
}
|
||||
|
||||
mrvl->id = version;
|
||||
mrvl->rev = version >> 8;
|
||||
|
||||
bt_dev_info(hdev, "Controller id = %x, rev = %x", mrvl->id, mrvl->rev);
|
||||
|
||||
clear_bit(STATE_CHIP_VER_PENDING, &mrvl->flags);
|
||||
smp_mb__after_atomic();
|
||||
wake_up_bit(&mrvl->flags, STATE_CHIP_VER_PENDING);
|
||||
|
||||
done:
|
||||
kfree_skb(skb);
|
||||
return ret;
|
||||
}
|
||||
|
||||
#define HCI_RECV_CHIP_VER \
|
||||
.type = HCI_CHIP_VER_PKT, \
|
||||
.hlen = HCI_MRVL_PKT_SIZE, \
|
||||
.loff = 0, \
|
||||
.lsize = 0, \
|
||||
.maxlen = HCI_MRVL_PKT_SIZE
|
||||
|
||||
#define HCI_RECV_FW_REQ \
|
||||
.type = HCI_FW_REQ_PKT, \
|
||||
.hlen = HCI_MRVL_PKT_SIZE, \
|
||||
.loff = 0, \
|
||||
.lsize = 0, \
|
||||
.maxlen = HCI_MRVL_PKT_SIZE
|
||||
|
||||
static const struct h4_recv_pkt mrvl_recv_pkts[] = {
|
||||
{ H4_RECV_ACL, .recv = hci_recv_frame },
|
||||
{ H4_RECV_SCO, .recv = hci_recv_frame },
|
||||
{ H4_RECV_EVENT, .recv = hci_recv_frame },
|
||||
{ HCI_RECV_FW_REQ, .recv = mrvl_recv_fw_req },
|
||||
{ HCI_RECV_CHIP_VER, .recv = mrvl_recv_chip_ver },
|
||||
};
|
||||
|
||||
static int mrvl_recv(struct hci_uart *hu, const void *data, int count)
|
||||
{
|
||||
struct mrvl_data *mrvl = hu->priv;
|
||||
|
||||
if (!test_bit(HCI_UART_REGISTERED, &hu->flags))
|
||||
return -EUNATCH;
|
||||
|
||||
mrvl->rx_skb = h4_recv_buf(hu->hdev, mrvl->rx_skb, data, count,
|
||||
mrvl_recv_pkts,
|
||||
ARRAY_SIZE(mrvl_recv_pkts));
|
||||
if (IS_ERR(mrvl->rx_skb)) {
|
||||
int err = PTR_ERR(mrvl->rx_skb);
|
||||
bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err);
|
||||
mrvl->rx_skb = NULL;
|
||||
return err;
|
||||
}
|
||||
|
||||
return count;
|
||||
}
|
||||
|
||||
static int mrvl_load_firmware(struct hci_dev *hdev, const char *name)
|
||||
{
|
||||
struct hci_uart *hu = hci_get_drvdata(hdev);
|
||||
struct mrvl_data *mrvl = hu->priv;
|
||||
const struct firmware *fw = NULL;
|
||||
const u8 *fw_ptr, *fw_max;
|
||||
int err;
|
||||
|
||||
err = request_firmware(&fw, name, &hdev->dev);
|
||||
if (err < 0) {
|
||||
bt_dev_err(hdev, "Failed to load firmware file %s", name);
|
||||
return err;
|
||||
}
|
||||
|
||||
fw_ptr = fw->data;
|
||||
fw_max = fw->data + fw->size;
|
||||
|
||||
bt_dev_info(hdev, "Loading %s", name);
|
||||
|
||||
set_bit(STATE_FW_REQ_PENDING, &mrvl->flags);
|
||||
|
||||
while (fw_ptr <= fw_max) {
|
||||
struct sk_buff *skb;
|
||||
|
||||
/* Controller drives the firmware load by sending firmware
|
||||
* request packets containing the expected fragment size.
|
||||
*/
|
||||
err = wait_on_bit_timeout(&mrvl->flags, STATE_FW_REQ_PENDING,
|
||||
TASK_INTERRUPTIBLE,
|
||||
msecs_to_jiffies(2000));
|
||||
if (err == 1) {
|
||||
bt_dev_err(hdev, "Firmware load interrupted");
|
||||
err = -EINTR;
|
||||
break;
|
||||
} else if (err) {
|
||||
bt_dev_err(hdev, "Firmware request timeout");
|
||||
err = -ETIMEDOUT;
|
||||
break;
|
||||
}
|
||||
|
||||
bt_dev_dbg(hdev, "Firmware request, expecting %d bytes",
|
||||
mrvl->tx_len);
|
||||
|
||||
if (fw_ptr == fw_max) {
|
||||
/* Controller requests a null size once firmware is
|
||||
* fully loaded. If controller expects more data, there
|
||||
* is an issue.
|
||||
*/
|
||||
if (!mrvl->tx_len) {
|
||||
bt_dev_info(hdev, "Firmware loading complete");
|
||||
} else {
|
||||
bt_dev_err(hdev, "Firmware loading failure");
|
||||
err = -EINVAL;
|
||||
}
|
||||
break;
|
||||
}
|
||||
|
||||
if (fw_ptr + mrvl->tx_len > fw_max) {
|
||||
mrvl->tx_len = fw_max - fw_ptr;
|
||||
bt_dev_dbg(hdev, "Adjusting tx_len to %d",
|
||||
mrvl->tx_len);
|
||||
}
|
||||
|
||||
skb = bt_skb_alloc(mrvl->tx_len, GFP_KERNEL);
|
||||
if (!skb) {
|
||||
bt_dev_err(hdev, "Failed to alloc mem for FW packet");
|
||||
err = -ENOMEM;
|
||||
break;
|
||||
}
|
||||
bt_cb(skb)->pkt_type = MRVL_RAW_DATA;
|
||||
|
||||
memcpy(skb_put(skb, mrvl->tx_len), fw_ptr, mrvl->tx_len);
|
||||
fw_ptr += mrvl->tx_len;
|
||||
|
||||
set_bit(STATE_FW_REQ_PENDING, &mrvl->flags);
|
||||
|
||||
skb_queue_tail(&mrvl->rawq, skb);
|
||||
hci_uart_tx_wakeup(hu);
|
||||
}
|
||||
|
||||
release_firmware(fw);
|
||||
return err;
|
||||
}
|
||||
|
||||
static int mrvl_setup(struct hci_uart *hu)
|
||||
{
|
||||
int err;
|
||||
|
||||
hci_uart_set_flow_control(hu, true);
|
||||
|
||||
err = mrvl_load_firmware(hu->hdev, "mrvl/helper_uart_3000000.bin");
|
||||
if (err) {
|
||||
bt_dev_err(hu->hdev, "Unable to download firmware helper");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
hci_uart_set_baudrate(hu, 3000000);
|
||||
hci_uart_set_flow_control(hu, false);
|
||||
|
||||
err = mrvl_load_firmware(hu->hdev, "mrvl/uart8897_bt.bin");
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct hci_uart_proto mrvl_proto = {
|
||||
.id = HCI_UART_MRVL,
|
||||
.name = "Marvell",
|
||||
.init_speed = 115200,
|
||||
.open = mrvl_open,
|
||||
.close = mrvl_close,
|
||||
.flush = mrvl_flush,
|
||||
.setup = mrvl_setup,
|
||||
.recv = mrvl_recv,
|
||||
.enqueue = mrvl_enqueue,
|
||||
.dequeue = mrvl_dequeue,
|
||||
};
|
||||
|
||||
int __init mrvl_init(void)
|
||||
{
|
||||
return hci_uart_register_proto(&mrvl_proto);
|
||||
}
|
||||
|
||||
int __exit mrvl_deinit(void)
|
||||
{
|
||||
return hci_uart_unregister_proto(&mrvl_proto);
|
||||
}
|
||||
@ -35,7 +35,7 @@
|
||||
#define HCIUARTGETFLAGS _IOR('U', 204, int)
|
||||
|
||||
/* UART protocols */
|
||||
#define HCI_UART_MAX_PROTO 11
|
||||
#define HCI_UART_MAX_PROTO 12
|
||||
|
||||
#define HCI_UART_H4 0
|
||||
#define HCI_UART_BCSP 1
|
||||
@ -48,6 +48,7 @@
|
||||
#define HCI_UART_QCA 8
|
||||
#define HCI_UART_AG6XX 9
|
||||
#define HCI_UART_NOKIA 10
|
||||
#define HCI_UART_MRVL 11
|
||||
|
||||
#define HCI_UART_RAW_DEVICE 0
|
||||
#define HCI_UART_RESET_ON_INIT 1
|
||||
@ -190,3 +191,8 @@ int qca_deinit(void);
|
||||
int ag6xx_init(void);
|
||||
int ag6xx_deinit(void);
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_BT_HCIUART_MRVL
|
||||
int mrvl_init(void);
|
||||
int mrvl_deinit(void);
|
||||
#endif
|
||||
|
||||
Loading…
Reference in New Issue
Block a user