From 931ac1c3c86868d7be83df300b922783a72266cc Mon Sep 17 00:00:00 2001 From: Cody Xie Date: Wed, 24 Apr 2013 19:43:58 +0800 Subject: [PATCH] support rtl88723as --- drivers/bluetooth/Kconfig | 10 + drivers/bluetooth/Makefile | 1 + drivers/bluetooth/hci_ldisc.c | 13 +- drivers/bluetooth/hci_rtk_h5.c | 846 +++++++++++++++++++++++++++++++++ drivers/bluetooth/hci_uart.h | 7 + 5 files changed, 875 insertions(+), 2 deletions(-) create mode 100644 drivers/bluetooth/hci_rtk_h5.c diff --git a/drivers/bluetooth/Kconfig b/drivers/bluetooth/Kconfig index cceaab11a091..f35537692a6e 100755 --- a/drivers/bluetooth/Kconfig +++ b/drivers/bluetooth/Kconfig @@ -70,6 +70,16 @@ config BT_HCIUART_ATH3K Say Y here to compile support for HCI UART ATH3K protocol. +config BT_HCIUART_RTKH5 + bool "Realtek H5 protocol support" + depends on BT_HCIUART + help + Realtek H5 is serial protocol for communication + between Realtek Bluetooth device and host. This protocol is required for + Realtek uart h5 bluetooth controller + + Say Y here to compile support for Realtek HCI H5 protocol. + config BT_HCIUART_LL bool "HCILL protocol support" depends on BT_HCIUART diff --git a/drivers/bluetooth/Makefile b/drivers/bluetooth/Makefile index 900db5f396e7..fd5c3d2959ea 100755 --- a/drivers/bluetooth/Makefile +++ b/drivers/bluetooth/Makefile @@ -29,4 +29,5 @@ 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-$(CONFIG_BT_HCIUART_RTKH5) += hci_rtk_h5.o hci_uart-objs := $(hci_uart-y) diff --git a/drivers/bluetooth/hci_ldisc.c b/drivers/bluetooth/hci_ldisc.c index b79b04398a3b..215fd3f8d349 100755 --- a/drivers/bluetooth/hci_ldisc.c +++ b/drivers/bluetooth/hci_ldisc.c @@ -599,9 +599,14 @@ static int __init hci_uart_init(void) ll_init(); #endif #ifdef CONFIG_BT_HCIUART_ATH3K - ath_init(); + ath_init(); #endif - +//Realtek_add_start +//add realtek h5 support +#ifdef CONFIG_BT_HCIUART_RTKH5 + h5_init(); +#endif +//Realtek_add_end return 0; } @@ -622,6 +627,10 @@ static void __exit hci_uart_exit(void) ath_deinit(); #endif +#ifdef CONFIG_BT_HCIUART_RTKH5 + h5_deinit(); +#endif + /* Release tty registration of line discipline */ if ((err = tty_unregister_ldisc(N_HCI))) BT_ERR("Can't unregister HCI line discipline (%d)", err); diff --git a/drivers/bluetooth/hci_rtk_h5.c b/drivers/bluetooth/hci_rtk_h5.c new file mode 100644 index 000000000000..201b1aa805e9 --- /dev/null +++ b/drivers/bluetooth/hci_rtk_h5.c @@ -0,0 +1,846 @@ +/* + * + * Bluetooth HCI UART driver + * + * Copyright (C) 2011-2014 wifi_fae + * + * + * 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 + +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +#include "hci_uart.h" + +#define VERSION "1.0" + +static int txcrc = 1; +//static int hciextn = 1; + +#define H5_TXWINSIZE 4 +#define H5_ACK_PKT 0x00 +#define H5_LE_PKT 0x0F +#define H5_VDRSPEC_PKT 0x0E + +struct h5_struct { + struct sk_buff_head unack; /* Unack'ed packets queue */ + struct sk_buff_head rel; /* Reliable packets queue */ + struct sk_buff_head unrel; /* Unreliable packets queue */ + + unsigned long rx_count; + struct sk_buff *rx_skb; + u8 rxseq_txack; /* rxseq == txack. */ + u8 rxack; /* Last packet sent by us that the peer ack'ed */ + struct timer_list th5; + + enum { + H5_W4_PKT_DELIMITER, + H5_W4_PKT_START, + H5_W4_HDR, + H5_W4_DATA, + H5_W4_CRC + } rx_state; + + enum { + H5_ESCSTATE_NOESC, + H5_ESCSTATE_ESC + } rx_esc_state; + + u8 use_crc; + u16 message_crc; + u8 txack_req; /* Do we need to send ack's to the peer? */ + + /* Reliable packet sequence number - used to assign seq to each rel pkt. */ + u8 msgq_txseq; +}; + +/* ---- H5 CRC calculation ---- */ + +/* Table for calculating CRC for polynomial 0x1021, LSB processed first, +initial value 0xffff, bits shifted in reverse order. */ + +static const u16 crc_table[] = { + 0x0000, 0x1081, 0x2102, 0x3183, + 0x4204, 0x5285, 0x6306, 0x7387, + 0x8408, 0x9489, 0xa50a, 0xb58b, + 0xc60c, 0xd68d, 0xe70e, 0xf78f +}; + +/* Initialise the crc calculator */ +#define H5_CRC_INIT(x) x = 0xffff + +/* + Update crc with next data byte + + Implementation note + The data byte is treated as two nibbles. The crc is generated + in reverse, i.e., bits are fed into the register from the top. +*/ +static void h5_crc_update(u16 *crc, u8 d) +{ + u16 reg = *crc; + + reg = (reg >> 4) ^ crc_table[(reg ^ d) & 0x000f]; + reg = (reg >> 4) ^ crc_table[(reg ^ (d >> 4)) & 0x000f]; + + *crc = reg; +} + +/* ---- H5 core ---- */ + +static void h5_slip_msgdelim(struct sk_buff *skb) +{ + const char pkt_delim = 0xc0; + + memcpy(skb_put(skb, 1), &pkt_delim, 1); +} + +static void h5_slip_one_byte(struct sk_buff *skb, u8 c) +{ + const char esc_c0[2] = { 0xdb, 0xdc }; + const char esc_db[2] = { 0xdb, 0xdd }; + const char esc_11[2] = { 0xdb, 0xde }; + const char esc_13[2] = { 0xdb, 0xdf }; + + switch (c) { + case 0xc0: + memcpy(skb_put(skb, 2), &esc_c0, 2); + break; + case 0xdb: + memcpy(skb_put(skb, 2), &esc_db, 2); + break; + case 0x11: + memcpy(skb_put(skb, 2), &esc_11, 2); + break; + case 0x13: + memcpy(skb_put(skb, 2), &esc_13, 2); + break; + default: + memcpy(skb_put(skb, 1), &c, 1); + } +} + +static int h5_enqueue(struct hci_uart *hu, struct sk_buff *skb) +{ + struct h5_struct *h5 = hu->priv; + + if (skb->len > 0xFFF) { //Pkt length must be less than 4095 bytes + BT_ERR("Packet too long"); + kfree_skb(skb); + return 0; + } + + switch (bt_cb(skb)->pkt_type) { + case HCI_ACLDATA_PKT: + case HCI_COMMAND_PKT: + skb_queue_tail(&h5->rel, skb); + break; + + case HCI_SCODATA_PKT: + skb_queue_tail(&h5->unrel, skb); + break; + case H5_LE_PKT: + case H5_ACK_PKT: + case H5_VDRSPEC_PKT: + skb_queue_tail(&h5->unrel, skb); /* 3-wire LinkEstablishment*/ + break; + + default: + BT_ERR("Unknown packet type"); + kfree_skb(skb); + break; + } + + return 0; +} + +static struct sk_buff *h5_prepare_pkt(struct h5_struct *h5, u8 *data, + int len, int pkt_type) +{ + struct sk_buff *nskb; + u8 hdr[4], chan; + u16 H5_CRC_INIT(h5_txmsg_crc); + int rel, i; + + switch (pkt_type) { + case HCI_ACLDATA_PKT: + chan = 2; /* 3-wire ACL channel */ + rel = 1; /* reliable channel */ + break; + case HCI_COMMAND_PKT: + chan = 1; /* 3-wire cmd channel */ + rel = 1; /* reliable channel */ + break; + case HCI_EVENT_PKT: + chan = 4; /* 3-wire cmd channel */ + rel = 1; /* reliable channel */ + break; + case HCI_SCODATA_PKT: + chan = 3; /* 3-wire SCO channel */ + rel = 0; /* unreliable channel */ + break; + case H5_LE_PKT: + chan = 15; /* 3-wire LinkEstablishment channel */ + rel = 0; /* unreliable channel */ + break; + case H5_ACK_PKT: + chan = 0; /* 3-wire ACK channel */ + rel = 0; /* unreliable channel */ + break; + case H5_VDRSPEC_PKT: + chan = 14; /* 3-wire Vendor Specific channel */ + rel = 0; /* unreliable channel */ + break; + default: + BT_ERR("Unknown packet type"); + return NULL; + } + + + /* Max len of packet: (original len +4(h5 hdr) +2(crc))*2 + (because bytes 0xc0 and 0xdb are escaped, worst case is + when the packet is all made of 0xc0 and 0xdb :) ) + + 2 (0xc0 delimiters at start and end). */ + + nskb = alloc_skb((len + 6) * 2 + 2, GFP_ATOMIC); + if (!nskb) + return NULL; + + bt_cb(nskb)->pkt_type = pkt_type; + + h5_slip_msgdelim(nskb); + + hdr[0] = h5->rxseq_txack << 3; + h5->txack_req = 0; + BT_DBG("We request packet no %u to card", h5->rxseq_txack); + + if (rel) { + hdr[0] |= 0x80 + h5->msgq_txseq; + BT_DBG("Sending packet with seqno %u", h5->msgq_txseq); + h5->msgq_txseq = (h5->msgq_txseq + 1) & 0x07; + } + + if (h5->use_crc) + hdr[0] |= 0x40; + + hdr[1] = ((len << 4) & 0xff) | chan; + hdr[2] = len >> 4; + hdr[3] = ~(hdr[0] + hdr[1] + hdr[2]); + + /* Put H5 header */ + for (i = 0; i < 4; i++) { + h5_slip_one_byte(nskb, hdr[i]); + + if (h5->use_crc) + h5_crc_update(&h5_txmsg_crc, hdr[i]); + } + + /* Put payload */ + for (i = 0; i < len; i++) { + h5_slip_one_byte(nskb, data[i]); + + if (h5->use_crc) + h5_crc_update(&h5_txmsg_crc, data[i]); + } + + /* Put CRC */ + if (h5->use_crc) { + h5_txmsg_crc = bitrev16(h5_txmsg_crc); + h5_slip_one_byte(nskb, (u8) ((h5_txmsg_crc >> 8) & 0x00ff)); + h5_slip_one_byte(nskb, (u8) (h5_txmsg_crc & 0x00ff)); + } + + h5_slip_msgdelim(nskb); + return nskb; +} + +/* This is a rewrite of pkt_avail in AH5 */ +static struct sk_buff *h5_dequeue(struct hci_uart *hu) +{ + struct h5_struct *h5 = hu->priv; + unsigned long flags; + struct sk_buff *skb; + + /* First of all, check for unreliable messages in the queue, + since they have priority */ + + if ((skb = skb_dequeue(&h5->unrel)) != NULL) { + struct sk_buff *nskb = h5_prepare_pkt(h5, skb->data, skb->len, bt_cb(skb)->pkt_type); + if (nskb) { + kfree_skb(skb); + return nskb; + } else { + skb_queue_head(&h5->unrel, skb); + BT_ERR("Could not dequeue pkt because alloc_skb failed"); + } + } + + /* Now, try to send a reliable pkt. We can only send a + reliable packet if the number of packets sent but not yet ack'ed + is < than the winsize */ + + spin_lock_irqsave_nested(&h5->unack.lock, flags, SINGLE_DEPTH_NESTING); + + if (h5->unack.qlen < H5_TXWINSIZE && (skb = skb_dequeue(&h5->rel)) != NULL) { + struct sk_buff *nskb = h5_prepare_pkt(h5, skb->data, skb->len, bt_cb(skb)->pkt_type); + if (nskb) { + __skb_queue_tail(&h5->unack, skb); + mod_timer(&h5->th5, jiffies + HZ / 4); + spin_unlock_irqrestore(&h5->unack.lock, flags); + return nskb; + } else { + skb_queue_head(&h5->rel, skb); + BT_ERR("Could not dequeue pkt because alloc_skb failed"); + } + } + + spin_unlock_irqrestore(&h5->unack.lock, flags); + + /* We could not send a reliable packet, either because there are + none or because there are too many unack'ed pkts. Did we receive + any packets we have not acknowledged yet ? */ + + if (h5->txack_req) { + /* if so, craft an empty ACK pkt and send it on H5 unreliable + channel 0 */ + struct sk_buff *nskb = h5_prepare_pkt(h5, NULL, 0, H5_ACK_PKT); + return nskb; + } + + /* We have nothing to send */ + return NULL; +} + +static int h5_flush(struct hci_uart *hu) +{ + BT_DBG("hu %p", hu); + return 0; +} + +/* Remove ack'ed packets */ +static void h5_pkt_cull(struct h5_struct *h5) +{ + struct sk_buff *skb, *tmp; + unsigned long flags; + int i, pkts_to_be_removed; + u8 seqno; + + spin_lock_irqsave(&h5->unack.lock, flags); + + pkts_to_be_removed = skb_queue_len(&h5->unack); + seqno = h5->msgq_txseq; + + while (pkts_to_be_removed) { + if (h5->rxack == seqno) + break; + pkts_to_be_removed--; + seqno = (seqno - 1) & 0x07; + } + + if (h5->rxack != seqno) + BT_ERR("Peer acked invalid packet"); + + BT_DBG("Removing %u pkts out of %u, up to seqno %u", + pkts_to_be_removed, skb_queue_len(&h5->unack), + (seqno - 1) & 0x07); + + i = 0; + skb_queue_walk_safe(&h5->unack, skb, tmp) { + if (i >= pkts_to_be_removed) + break; + i++; + + __skb_unlink(skb, &h5->unack); + kfree_skb(skb); + } + + if (skb_queue_empty(&h5->unack)) + del_timer(&h5->th5); + + spin_unlock_irqrestore(&h5->unack.lock, flags); + + if (i != pkts_to_be_removed) + BT_ERR("Removed only %u out of %u pkts", i, pkts_to_be_removed); +} + +/* Handle H5 link-establishment packets. When we + detect a "sync" packet, symptom that the BT module has reset, + we do nothing :) (yet) */ +static void h5_handle_le_pkt(struct hci_uart *hu) +{ + struct h5_struct *h5 = hu->priv; + u8 conf_pkt[2] = { 0x03, 0xfc}; + u8 conf_rsp_pkt[3] = { 0x04, 0x7b, 0x00}; + u8 sync_pkt[2] = { 0x01, 0x7e}; + u8 sync_rsp_pkt[2] = { 0x02, 0x7d}; + + u8 wakeup_pkt[2] = { 0x05, 0xfa}; + u8 woken_pkt[2] = { 0x06, 0xf9}; + u8 sleep_pkt[2] = { 0x07, 0x78}; + + /* spot "conf" pkts and reply with a "conf rsp" pkt */ + if (h5->rx_skb->data[1] >> 4 == 2 && h5->rx_skb->data[2] == 0 && + !memcmp(&h5->rx_skb->data[4], conf_pkt, 2)) { + struct sk_buff *nskb = alloc_skb(3, GFP_ATOMIC); + + BT_DBG("Found a LE conf pkt"); + if (!nskb) + return; + + conf_rsp_pkt[2] |= txcrc << 0x4; //crc check enable, version no = 0. needed to be as avariable. + memcpy(skb_put(nskb, 3), conf_rsp_pkt, 3); + bt_cb(nskb)->pkt_type = H5_LE_PKT; + + skb_queue_head(&h5->unrel, nskb); + hci_uart_tx_wakeup(hu); + } + /* spot "conf resp" pkts*/ + else if (h5->rx_skb->data[1] >> 4 == 2 && h5->rx_skb->data[2] == 0 && + !memcmp(&h5->rx_skb->data[4], conf_rsp_pkt, 2)) { + BT_DBG("Found a LE conf resp pkt, device go into active state"); + txcrc = (h5->rx_skb->data[6] >> 0x4) & 0x1; + } + + /* Spot "sync" pkts. If we find one...disaster! */ + else if (h5->rx_skb->data[1] >> 4 == 2 && h5->rx_skb->data[2] == 0 && + !memcmp(&h5->rx_skb->data[4], sync_pkt, 2)) { + BT_ERR("Found a LE sync pkt, card has reset"); + //DO Something here + } + /* Spot "sync resp" pkts. If we find one...disaster! */ + else if (h5->rx_skb->data[1] >> 4 == 2 && h5->rx_skb->data[2] == 0 && + !memcmp(&h5->rx_skb->data[4], sync_rsp_pkt, 2)) { + BT_ERR("Found a LE sync resp pkt, device go into initialized state"); + // DO Something here + } + /* Spot "wakeup" pkts. reply woken message when in active mode */ + else if (h5->rx_skb->data[1] >> 4 == 2 && h5->rx_skb->data[2] == 0 && + !memcmp(&h5->rx_skb->data[4], wakeup_pkt, 2)) { + struct sk_buff *nskb = alloc_skb(2, GFP_ATOMIC); + + BT_ERR("Found a LE Wakeup pkt, and reply woken message"); + // DO Something here + + memcpy(skb_put(nskb, 2), woken_pkt, 2); + bt_cb(nskb)->pkt_type = H5_LE_PKT; + + skb_queue_head(&h5->unrel, nskb); + hci_uart_tx_wakeup(hu); + } + /* Spot "woken" pkts. receive woken message from device */ + else if (h5->rx_skb->data[1] >> 4 == 2 && h5->rx_skb->data[2] == 0 && + !memcmp(&h5->rx_skb->data[4], woken_pkt, 2)) { + BT_ERR("Found a LE woken pkt from device"); + // DO Something here + } + /* Spot "Sleep" pkts*/ + else if (h5->rx_skb->data[1] >> 4 == 2 && h5->rx_skb->data[2] == 0 && + !memcmp(&h5->rx_skb->data[4], sleep_pkt, 2)) { + BT_ERR("Found a LE Sleep pkt"); + // DO Something here + } + +} + +static inline void h5_unslip_one_byte(struct h5_struct *h5, unsigned char byte) +{ + const u8 c0 = 0xc0, db = 0xdb; + const u8 oof1 = 0x11, oof2 = 0x13; + + switch (h5->rx_esc_state) { + case H5_ESCSTATE_NOESC: + switch (byte) { + case 0xdb: + h5->rx_esc_state = H5_ESCSTATE_ESC; + break; + default: + memcpy(skb_put(h5->rx_skb, 1), &byte, 1); + if ((h5->rx_skb-> data[0] & 0x40) != 0 && + h5->rx_state != H5_W4_CRC) + h5_crc_update(&h5->message_crc, byte); + h5->rx_count--; + } + break; + + case H5_ESCSTATE_ESC: + switch (byte) { + case 0xdc: + memcpy(skb_put(h5->rx_skb, 1), &c0, 1); + if ((h5->rx_skb-> data[0] & 0x40) != 0 && + h5->rx_state != H5_W4_CRC) + h5_crc_update(&h5-> message_crc, 0xc0); + h5->rx_esc_state = H5_ESCSTATE_NOESC; + h5->rx_count--; + break; + + case 0xdd: + memcpy(skb_put(h5->rx_skb, 1), &db, 1); + if ((h5->rx_skb-> data[0] & 0x40) != 0 && + h5->rx_state != H5_W4_CRC) + h5_crc_update(&h5-> message_crc, 0xdb); + h5->rx_esc_state = H5_ESCSTATE_NOESC; + h5->rx_count--; + break; + + case 0xde: + memcpy(skb_put(h5->rx_skb, 1), &oof1, 1); + if ((h5->rx_skb-> data[0] & 0x40) != 0 && h5->rx_state != H5_W4_CRC) + h5_crc_update(&h5-> message_crc, oof1); + h5->rx_esc_state = H5_ESCSTATE_NOESC; + h5->rx_count--; + break; + + case 0xdf: + memcpy(skb_put(h5->rx_skb, 1), &oof2, 1); + if ((h5->rx_skb-> data[0] & 0x40) != 0 && h5->rx_state != H5_W4_CRC) + h5_crc_update(&h5-> message_crc, oof2); + h5->rx_esc_state = H5_ESCSTATE_NOESC; + h5->rx_count--; + break; + + default: + BT_ERR ("Invalid byte %02x after esc byte", byte); + kfree_skb(h5->rx_skb); + h5->rx_skb = NULL; + h5->rx_state = H5_W4_PKT_DELIMITER; + h5->rx_count = 0; + } + } +} + +static void h5_complete_rx_pkt(struct hci_uart *hu) +{ + struct h5_struct *h5 = hu->priv; + int pass_up; + + if (h5->rx_skb->data[0] & 0x80) { /* reliable pkt */ + BT_DBG("Received seqno %u from card", h5->rxseq_txack); + h5->rxseq_txack++; + h5->rxseq_txack %= 0x8; + h5->txack_req = 1; + + /* If needed, transmit an ack pkt */ + hci_uart_tx_wakeup(hu); + } + + h5->rxack = (h5->rx_skb->data[0] >> 3) & 0x07; + BT_DBG("Request for pkt %u from card", h5->rxack); + + h5_pkt_cull(h5); + + if ((h5->rx_skb->data[1] & 0x0f) == 2 && + h5->rx_skb->data[0] & 0x80) { + bt_cb(h5->rx_skb)->pkt_type = HCI_ACLDATA_PKT; + pass_up = 1; + } else if ((h5->rx_skb->data[1] & 0x0f) == 4 && + h5->rx_skb->data[0] & 0x80) { + bt_cb(h5->rx_skb)->pkt_type = HCI_EVENT_PKT; + pass_up = 1; + } else if ((h5->rx_skb->data[1] & 0x0f) == 3) { + bt_cb(h5->rx_skb)->pkt_type = HCI_SCODATA_PKT; + pass_up = 1; + } else if ((h5->rx_skb->data[1] & 0x0f) == 15 && + !(h5->rx_skb->data[0] & 0x80)) { + //h5_handle_le_pkt(hu);//Link Establishment Pkt + pass_up = 0; + } else if ((h5->rx_skb->data[1] & 0x0f) == 1 && + h5->rx_skb->data[0] & 0x80) { + bt_cb(h5->rx_skb)->pkt_type = HCI_COMMAND_PKT; + pass_up = 1; + } else if ((h5->rx_skb->data[1] & 0x0f) == 14) { + bt_cb(h5->rx_skb)->pkt_type = H5_VDRSPEC_PKT; + pass_up = 1; + } else + pass_up = 0; + + if (!pass_up) { + struct hci_event_hdr hdr; + u8 desc = (h5->rx_skb->data[1] & 0x0f); + + if (desc != H5_ACK_PKT && desc != H5_LE_PKT) { +#if 0 + if (hciextn) { + desc |= 0xc0; + skb_pull(h5->rx_skb, 4); + memcpy(skb_push(h5->rx_skb, 1), &desc, 1); + + hdr.evt = 0xff; + hdr.plen = h5->rx_skb->len; + memcpy(skb_push(h5->rx_skb, HCI_EVENT_HDR_SIZE), &hdr, HCI_EVENT_HDR_SIZE); + bt_cb(h5->rx_skb)->pkt_type = HCI_EVENT_PKT; + + hci_recv_frame(h5->rx_skb); + } else { +#endif + BT_ERR ("Packet for unknown channel (%u %s)", + h5->rx_skb->data[1] & 0x0f, + h5->rx_skb->data[0] & 0x80 ? + "reliable" : "unreliable"); + kfree_skb(h5->rx_skb); +// } + } else + kfree_skb(h5->rx_skb); + } else { + /* Pull out H5 hdr */ + skb_pull(h5->rx_skb, 4); + + hci_recv_frame(h5->rx_skb); + } + + h5->rx_state = H5_W4_PKT_DELIMITER; + h5->rx_skb = NULL; +} + +static u16 bscp_get_crc(struct h5_struct *h5) +{ + return get_unaligned_be16(&h5->rx_skb->data[h5->rx_skb->len - 2]); +} + +/* Recv data */ +static int h5_recv(struct hci_uart *hu, void *data, int count) +{ + struct h5_struct *h5 = hu->priv; + register unsigned char *ptr; + + BT_DBG("hu %p count %d rx_state %d rx_count %ld", + hu, count, h5->rx_state, h5->rx_count); + + ptr = data; + while (count) { + if (h5->rx_count) { + if (*ptr == 0xc0) { + BT_ERR("Short H5 packet"); + kfree_skb(h5->rx_skb); + h5->rx_state = H5_W4_PKT_START; + h5->rx_count = 0; + } else + h5_unslip_one_byte(h5, *ptr); + + ptr++; count--; + continue; + } + + switch (h5->rx_state) { + case H5_W4_HDR: + if ((0xff & (u8) ~ (h5->rx_skb->data[0] + h5->rx_skb->data[1] + + h5->rx_skb->data[2])) != h5->rx_skb->data[3]) { + BT_ERR("Error in H5 hdr checksum"); + kfree_skb(h5->rx_skb); + h5->rx_state = H5_W4_PKT_DELIMITER; + h5->rx_count = 0; + continue; + } + if (h5->rx_skb->data[0] & 0x80 /* reliable pkt */ + && (h5->rx_skb->data[0] & 0x07) != h5->rxseq_txack) { + BT_ERR ("Out-of-order packet arrived, got %u expected %u", + h5->rx_skb->data[0] & 0x07, h5->rxseq_txack); + + h5->txack_req = 1; + hci_uart_tx_wakeup(hu); + kfree_skb(h5->rx_skb); + h5->rx_state = H5_W4_PKT_DELIMITER; + h5->rx_count = 0; + continue; + } + h5->rx_state = H5_W4_DATA; + h5->rx_count = (h5->rx_skb->data[1] >> 4) + + (h5->rx_skb->data[2] << 4); /* May be 0 */ + continue; + + case H5_W4_DATA: + if (h5->rx_skb->data[0] & 0x40) { /* pkt with crc */ + h5->rx_state = H5_W4_CRC; + h5->rx_count = 2; + } else + h5_complete_rx_pkt(hu); + continue; + + case H5_W4_CRC: + if (bitrev16(h5->message_crc) != bscp_get_crc(h5)) { + BT_ERR ("Checksum failed: computed %04x received %04x", + bitrev16(h5->message_crc), + bscp_get_crc(h5)); + + kfree_skb(h5->rx_skb); + h5->rx_state = H5_W4_PKT_DELIMITER; + h5->rx_count = 0; + continue; + } + skb_trim(h5->rx_skb, h5->rx_skb->len - 2); + h5_complete_rx_pkt(hu); + continue; + + case H5_W4_PKT_DELIMITER: + switch (*ptr) { + case 0xc0: + h5->rx_state = H5_W4_PKT_START; + break; + default: + /*BT_ERR("Ignoring byte %02x", *ptr);*/ + break; + } + ptr++; count--; + break; + + case H5_W4_PKT_START: + switch (*ptr) { + case 0xc0: + ptr++; count--; + break; + + default: + h5->rx_state = H5_W4_HDR; + h5->rx_count = 4; + h5->rx_esc_state = H5_ESCSTATE_NOESC; + H5_CRC_INIT(h5->message_crc); + + /* Do not increment ptr or decrement count + * Allocate packet. Max len of a H5 pkt= + * 0xFFF (payload) +4 (header) +2 (crc) */ + + h5->rx_skb = bt_skb_alloc(0x1005, GFP_ATOMIC); + if (!h5->rx_skb) { + BT_ERR("Can't allocate mem for new packet"); + h5->rx_state = H5_W4_PKT_DELIMITER; + h5->rx_count = 0; + return 0; + } + h5->rx_skb->dev = (void *) hu->hdev; + break; + } + break; + } + } + return count; +} + + /* Arrange to retransmit all messages in the relq. */ +static void h5_timed_event(unsigned long arg) +{ + struct hci_uart *hu = (struct hci_uart *) arg; + struct h5_struct *h5 = hu->priv; + struct sk_buff *skb; + unsigned long flags; + + BT_DBG("hu %p retransmitting %u pkts", hu, h5->unack.qlen); + + spin_lock_irqsave_nested(&h5->unack.lock, flags, SINGLE_DEPTH_NESTING); + + while ((skb = __skb_dequeue_tail(&h5->unack)) != NULL) { + h5->msgq_txseq = (h5->msgq_txseq - 1) & 0x07; + skb_queue_head(&h5->rel, skb); + } + + spin_unlock_irqrestore(&h5->unack.lock, flags); + + hci_uart_tx_wakeup(hu); +} + +static int h5_open(struct hci_uart *hu) +{ + struct h5_struct *h5; + + BT_DBG("hu %p", hu); + + h5 = kzalloc(sizeof(*h5), GFP_ATOMIC); + if (!h5) + return -ENOMEM; + + hu->priv = h5; + skb_queue_head_init(&h5->unack); + skb_queue_head_init(&h5->rel); + skb_queue_head_init(&h5->unrel); + + init_timer(&h5->th5); + h5->th5.function = h5_timed_event; + h5->th5.data = (u_long) hu; + + h5->rx_state = H5_W4_PKT_DELIMITER; + + if (txcrc) + h5->use_crc = 1; + + return 0; +} + +static int h5_close(struct hci_uart *hu) +{ + struct h5_struct *h5 = hu->priv; + hu->priv = NULL; + + BT_DBG("hu %p", hu); + + skb_queue_purge(&h5->unack); + skb_queue_purge(&h5->rel); + skb_queue_purge(&h5->unrel); + del_timer(&h5->th5); + + kfree(h5); + return 0; +} + +static struct hci_uart_proto h5 = { + .id = HCI_UART_3WIRE, + .open = h5_open, + .close = h5_close, + .enqueue = h5_enqueue, + .dequeue = h5_dequeue, + .recv = h5_recv, + .flush = h5_flush +}; + +int h5_init(void) +{ + int err = hci_uart_register_proto(&h5); + + if (!err) + BT_INFO("HCI Realtek H5 protocol initialized"); + else + BT_ERR("HCI Realtek H5 protocol registration failed"); + + return err; +} + +int h5_deinit(void) +{ + return hci_uart_unregister_proto(&h5); +} + +#if 0 +module_param(hciextn, bool, 0644); +MODULE_PARM_DESC(hciextn, "Convert HCI Extensions into H5 packets-3wire test"); +#endif diff --git a/drivers/bluetooth/hci_uart.h b/drivers/bluetooth/hci_uart.h index 99fb35239d1f..3bf515ffc05e 100644 --- a/drivers/bluetooth/hci_uart.h +++ b/drivers/bluetooth/hci_uart.h @@ -102,3 +102,10 @@ int ll_deinit(void); int ath_init(void); int ath_deinit(void); #endif + +//Realtek_add_start +#ifdef CONFIG_BT_HCIUART_RTKH5 +int h5_init(void); +int h5_deinit(void); +#endif +//Realtek_add_end -- 2.34.1