diff options
| -rw-r--r-- | drivers/bluetooth/Kconfig | 12 | ||||
| -rw-r--r-- | drivers/bluetooth/Makefile | 1 | ||||
| -rwxr-xr-x | drivers/bluetooth/hci_ath.c | 235 | ||||
| -rw-r--r-- | drivers/bluetooth/hci_ldisc.c | 6 | ||||
| -rw-r--r-- | drivers/bluetooth/hci_uart.h | 8 |
5 files changed, 261 insertions, 1 deletions
diff --git a/drivers/bluetooth/Kconfig b/drivers/bluetooth/Kconfig index 058fbcc..02deef4 100644 --- a/drivers/bluetooth/Kconfig +++ b/drivers/bluetooth/Kconfig @@ -58,6 +58,18 @@ config BT_HCIUART_BCSP Say Y here to compile support for HCI BCSP protocol. +config BT_HCIUART_ATH3K + bool "Atheros AR300x serial support" + depends on BT_HCIUART + help + HCIATH3K (HCI Atheros AR300x) is a serial protocol for + communication between host and Atheros AR300x Bluetooth devices. + This protocol enables AR300x chips to be enabled with + power management support. + Enable this if you have Atheros AR300x serial Bluetooth device. + + Say Y here to compile support for HCI UART ATH3K protocol. + config BT_HCIUART_LL bool "HCILL protocol support" depends on BT_HCIUART diff --git a/drivers/bluetooth/Makefile b/drivers/bluetooth/Makefile index 7e5aed5..71bdf13 100644 --- a/drivers/bluetooth/Makefile +++ b/drivers/bluetooth/Makefile @@ -26,4 +26,5 @@ hci_uart-y := hci_ldisc.o hci_uart-$(CONFIG_BT_HCIUART_H4) += hci_h4.o hci_uart-$(CONFIG_BT_HCIUART_BCSP) += hci_bcsp.o hci_uart-$(CONFIG_BT_HCIUART_LL) += hci_ll.o +hci_uart-$(CONFIG_BT_HCIUART_ATH3K) += hci_ath.o hci_uart-objs := $(hci_uart-y) diff --git a/drivers/bluetooth/hci_ath.c b/drivers/bluetooth/hci_ath.c new file mode 100755 index 0000000..5ab258b --- /dev/null +++ b/drivers/bluetooth/hci_ath.c @@ -0,0 +1,235 @@ +/* + * Atheros Communication Bluetooth HCIATH3K UART protocol + * + * HCIATH3K (HCI Atheros AR300x Protocol) is a Atheros Communication's + * power management protocol extension to H4 to support AR300x Bluetooth Chip. + * + * Copyright (c) 2009-2010 Atheros Communications Inc. + * + * Acknowledgements: + * This file is based on hci_h4.c, which was written + * by Maxim Krasnyansky and Marcel Holtmann. + * + * 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/module.h> +#include <linux/kernel.h> + +#include <linux/init.h> +#include <linux/slab.h> +#include <linux/tty.h> +#include <linux/errno.h> +#include <linux/ioctl.h> +#include <linux/skbuff.h> + +#include <net/bluetooth/bluetooth.h> +#include <net/bluetooth/hci_core.h> + +#include "hci_uart.h" + +struct ath_struct { + struct hci_uart *hu; + unsigned int cur_sleep; + + struct sk_buff_head txq; + struct work_struct ctxtsw; +}; + +static int ath_wakeup_ar3k(struct tty_struct *tty) +{ + struct termios settings; + int status = tty->driver->ops->tiocmget(tty, NULL); + + if (status & TIOCM_CTS) + return status; + + /* Disable Automatic RTSCTS */ + n_tty_ioctl_helper(tty, NULL, TCGETS, (unsigned long)&settings); + settings.c_cflag &= ~CRTSCTS; + n_tty_ioctl_helper(tty, NULL, TCSETS, (unsigned long)&settings); + + /* Clear RTS first */ + status = tty->driver->ops->tiocmget(tty, NULL); + tty->driver->ops->tiocmset(tty, NULL, 0x00, TIOCM_RTS); + mdelay(20); + + /* Set RTS, wake up board */ + status = tty->driver->ops->tiocmget(tty, NULL); + tty->driver->ops->tiocmset(tty, NULL, TIOCM_RTS, 0x00); + mdelay(20); + + status = tty->driver->ops->tiocmget(tty, NULL); + + n_tty_ioctl_helper(tty, NULL, TCGETS, (unsigned long)&settings); + settings.c_cflag |= CRTSCTS; + n_tty_ioctl_helper(tty, NULL, TCSETS, (unsigned long)&settings); + + return status; +} + +static void ath_hci_uart_work(struct work_struct *work) +{ + int status; + struct ath_struct *ath; + struct hci_uart *hu; + struct tty_struct *tty; + + ath = container_of(work, struct ath_struct, ctxtsw); + + hu = ath->hu; + tty = hu->tty; + + /* verify and wake up controller */ + if (ath->cur_sleep) { + status = ath_wakeup_ar3k(tty); + if (!(status & TIOCM_CTS)) + return; + } + + /* Ready to send Data */ + clear_bit(HCI_UART_SENDING, &hu->tx_state); + hci_uart_tx_wakeup(hu); +} + +/* Initialize protocol */ +static int ath_open(struct hci_uart *hu) +{ + struct ath_struct *ath; + + BT_DBG("hu %p", hu); + + ath = kzalloc(sizeof(*ath), GFP_ATOMIC); + if (!ath) + return -ENOMEM; + + skb_queue_head_init(&ath->txq); + + hu->priv = ath; + ath->hu = hu; + + INIT_WORK(&ath->ctxtsw, ath_hci_uart_work); + + return 0; +} + +/* Flush protocol data */ +static int ath_flush(struct hci_uart *hu) +{ + struct ath_struct *ath = hu->priv; + + BT_DBG("hu %p", hu); + + skb_queue_purge(&ath->txq); + + return 0; +} + +/* Close protocol */ +static int ath_close(struct hci_uart *hu) +{ + struct ath_struct *ath = hu->priv; + + BT_DBG("hu %p", hu); + + skb_queue_purge(&ath->txq); + + cancel_work_sync(&ath->ctxtsw); + + hu->priv = NULL; + kfree(ath); + + return 0; +} + +#define HCI_OP_ATH_SLEEP 0xFC04 + +/* Enqueue frame for transmittion */ +static int ath_enqueue(struct hci_uart *hu, struct sk_buff *skb) +{ + struct ath_struct *ath = hu->priv; + + if (bt_cb(skb)->pkt_type == HCI_SCODATA_PKT) { + kfree(skb); + return 0; + } + + /* + * Update power management enable flag with parameters of + * HCI sleep enable vendor specific HCI command. + */ + if (bt_cb(skb)->pkt_type == HCI_COMMAND_PKT) { + struct hci_command_hdr *hdr = (void *)skb->data; + + if (__le16_to_cpu(hdr->opcode) == HCI_OP_ATH_SLEEP) + ath->cur_sleep = skb->data[HCI_COMMAND_HDR_SIZE]; + } + + BT_DBG("hu %p skb %p", hu, skb); + + /* Prepend skb with frame type */ + memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1); + + skb_queue_tail(&ath->txq, skb); + set_bit(HCI_UART_SENDING, &hu->tx_state); + + schedule_work(&ath->ctxtsw); + + return 0; +} + +static struct sk_buff *ath_dequeue(struct hci_uart *hu) +{ + struct ath_struct *ath = hu->priv; + + return skb_dequeue(&ath->txq); +} + +/* Recv data */ +static int ath_recv(struct hci_uart *hu, void *data, int count) +{ + if (hci_recv_stream_fragment(hu->hdev, data, count) < 0) + BT_ERR("Frame Reassembly Failed"); + + return count; +} + +static struct hci_uart_proto athp = { + .id = HCI_UART_ATH3K, + .open = ath_open, + .close = ath_close, + .recv = ath_recv, + .enqueue = ath_enqueue, + .dequeue = ath_dequeue, + .flush = ath_flush, +}; + +int ath_init(void) +{ + int err = hci_uart_register_proto(&athp); + + if (!err) + BT_INFO("HCIATH3K protocol initialized"); + else + BT_ERR("HCIATH3K protocol registration failed"); + + return err; +} + +int ath_deinit(void) +{ + return hci_uart_unregister_proto(&athp); +} diff --git a/drivers/bluetooth/hci_ldisc.c b/drivers/bluetooth/hci_ldisc.c index a57dbfc..998833d 100644 --- a/drivers/bluetooth/hci_ldisc.c +++ b/drivers/bluetooth/hci_ldisc.c @@ -552,6 +552,9 @@ static int __init hci_uart_init(void) #ifdef CONFIG_BT_HCIUART_LL ll_init(); #endif +#ifdef CONFIG_BT_HCIUART_ATH3K + ath_init(); +#endif return 0; } @@ -569,6 +572,9 @@ static void __exit hci_uart_exit(void) #ifdef CONFIG_BT_HCIUART_LL ll_deinit(); #endif +#ifdef CONFIG_BT_HCIUART_ATH3K + ath_deinit(); +#endif /* Release tty registration of line discipline */ if ((err = tty_unregister_ldisc(N_HCI))) diff --git a/drivers/bluetooth/hci_uart.h b/drivers/bluetooth/hci_uart.h index 9694d9d..99fb352 100644 --- a/drivers/bluetooth/hci_uart.h +++ b/drivers/bluetooth/hci_uart.h @@ -35,13 +35,14 @@ #define HCIUARTGETFLAGS _IOR('U', 204, int) /* UART protocols */ -#define HCI_UART_MAX_PROTO 5 +#define HCI_UART_MAX_PROTO 6 #define HCI_UART_H4 0 #define HCI_UART_BCSP 1 #define HCI_UART_3WIRE 2 #define HCI_UART_H4DS 3 #define HCI_UART_LL 4 +#define HCI_UART_ATH3K 5 #define HCI_UART_RAW_DEVICE 0 @@ -96,3 +97,8 @@ int bcsp_deinit(void); int ll_init(void); int ll_deinit(void); #endif + +#ifdef CONFIG_BT_HCIUART_ATH3K +int ath_init(void); +int ath_deinit(void); +#endif |