mirror of
https://github.com/AetherDroid/android_kernel_samsung_on5xelte.git
synced 2025-09-08 17:18:05 -04:00
Fixed MTP to work with TWRP
This commit is contained in:
awab228
commit
f6dfaef42e
50820 changed files with 20846062 additions and 0 deletions
363
drivers/bluetooth/btwilink.c
Normal file
363
drivers/bluetooth/btwilink.c
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@ -0,0 +1,363 @@
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/*
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* Texas Instrument's Bluetooth Driver For Shared Transport.
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*
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* Bluetooth Driver acts as interface between HCI core and
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* TI Shared Transport Layer.
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*
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* Copyright (C) 2009-2010 Texas Instruments
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* Author: Raja Mani <raja_mani@ti.com>
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* Pavan Savoy <pavan_savoy@ti.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#define DEBUG
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#include <linux/platform_device.h>
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#include <net/bluetooth/bluetooth.h>
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#include <net/bluetooth/hci_core.h>
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#include <net/bluetooth/hci.h>
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#include <linux/ti_wilink_st.h>
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#include <linux/module.h>
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/* Bluetooth Driver Version */
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#define VERSION "1.0"
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#define MAX_BT_CHNL_IDS 3
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/* Number of seconds to wait for registration completion
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* when ST returns PENDING status.
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*/
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#define BT_REGISTER_TIMEOUT 6000 /* 6 sec */
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/**
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* struct ti_st - driver operation structure
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* @hdev: hci device pointer which binds to bt driver
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* @reg_status: ST registration callback status
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* @st_write: write function provided by the ST driver
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* to be used by the driver during send_frame.
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* @wait_reg_completion - completion sync between ti_st_open
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* and st_reg_completion_cb.
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*/
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struct ti_st {
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struct hci_dev *hdev;
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char reg_status;
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long (*st_write) (struct sk_buff *);
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struct completion wait_reg_completion;
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};
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/* Increments HCI counters based on pocket ID (cmd,acl,sco) */
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static inline void ti_st_tx_complete(struct ti_st *hst, int pkt_type)
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{
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struct hci_dev *hdev = hst->hdev;
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/* Update HCI stat counters */
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switch (pkt_type) {
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case HCI_COMMAND_PKT:
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hdev->stat.cmd_tx++;
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break;
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case HCI_ACLDATA_PKT:
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hdev->stat.acl_tx++;
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break;
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case HCI_SCODATA_PKT:
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hdev->stat.sco_tx++;
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break;
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}
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}
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/* ------- Interfaces to Shared Transport ------ */
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/* Called by ST layer to indicate protocol registration completion
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* status.ti_st_open() function will wait for signal from this
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* API when st_register() function returns ST_PENDING.
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*/
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static void st_reg_completion_cb(void *priv_data, char data)
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{
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struct ti_st *lhst = priv_data;
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/* Save registration status for use in ti_st_open() */
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lhst->reg_status = data;
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/* complete the wait in ti_st_open() */
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complete(&lhst->wait_reg_completion);
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}
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/* Called by Shared Transport layer when receive data is
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* available */
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static long st_receive(void *priv_data, struct sk_buff *skb)
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{
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struct ti_st *lhst = priv_data;
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int err;
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if (!skb)
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return -EFAULT;
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if (!lhst) {
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kfree_skb(skb);
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return -EFAULT;
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}
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/* Forward skb to HCI core layer */
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err = hci_recv_frame(lhst->hdev, skb);
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if (err < 0) {
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BT_ERR("Unable to push skb to HCI core(%d)", err);
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return err;
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}
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lhst->hdev->stat.byte_rx += skb->len;
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return 0;
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}
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/* ------- Interfaces to HCI layer ------ */
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/* protocol structure registered with shared transport */
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static struct st_proto_s ti_st_proto[MAX_BT_CHNL_IDS] = {
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{
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.chnl_id = HCI_EVENT_PKT, /* HCI Events */
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.hdr_len = sizeof(struct hci_event_hdr),
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.offset_len_in_hdr = offsetof(struct hci_event_hdr, plen),
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.len_size = 1, /* sizeof(plen) in struct hci_event_hdr */
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.reserve = 8,
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},
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{
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.chnl_id = HCI_ACLDATA_PKT, /* ACL */
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.hdr_len = sizeof(struct hci_acl_hdr),
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.offset_len_in_hdr = offsetof(struct hci_acl_hdr, dlen),
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.len_size = 2, /* sizeof(dlen) in struct hci_acl_hdr */
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.reserve = 8,
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},
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{
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.chnl_id = HCI_SCODATA_PKT, /* SCO */
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.hdr_len = sizeof(struct hci_sco_hdr),
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.offset_len_in_hdr = offsetof(struct hci_sco_hdr, dlen),
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.len_size = 1, /* sizeof(dlen) in struct hci_sco_hdr */
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.reserve = 8,
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},
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};
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/* Called from HCI core to initialize the device */
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static int ti_st_open(struct hci_dev *hdev)
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{
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unsigned long timeleft;
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struct ti_st *hst;
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int err, i;
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BT_DBG("%s %p", hdev->name, hdev);
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if (test_and_set_bit(HCI_RUNNING, &hdev->flags))
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return -EBUSY;
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/* provide contexts for callbacks from ST */
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hst = hci_get_drvdata(hdev);
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for (i = 0; i < MAX_BT_CHNL_IDS; i++) {
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ti_st_proto[i].priv_data = hst;
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ti_st_proto[i].max_frame_size = HCI_MAX_FRAME_SIZE;
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ti_st_proto[i].recv = st_receive;
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ti_st_proto[i].reg_complete_cb = st_reg_completion_cb;
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/* Prepare wait-for-completion handler */
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init_completion(&hst->wait_reg_completion);
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/* Reset ST registration callback status flag,
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* this value will be updated in
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* st_reg_completion_cb()
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* function whenever it called from ST driver.
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*/
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hst->reg_status = -EINPROGRESS;
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err = st_register(&ti_st_proto[i]);
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if (!err)
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goto done;
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if (err != -EINPROGRESS) {
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clear_bit(HCI_RUNNING, &hdev->flags);
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BT_ERR("st_register failed %d", err);
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return err;
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}
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/* ST is busy with either protocol
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* registration or firmware download.
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*/
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BT_DBG("waiting for registration "
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"completion signal from ST");
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timeleft = wait_for_completion_timeout
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(&hst->wait_reg_completion,
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msecs_to_jiffies(BT_REGISTER_TIMEOUT));
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if (!timeleft) {
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clear_bit(HCI_RUNNING, &hdev->flags);
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BT_ERR("Timeout(%d sec),didn't get reg "
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"completion signal from ST",
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BT_REGISTER_TIMEOUT / 1000);
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return -ETIMEDOUT;
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}
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/* Is ST registration callback
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* called with ERROR status? */
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if (hst->reg_status != 0) {
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clear_bit(HCI_RUNNING, &hdev->flags);
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BT_ERR("ST registration completed with invalid "
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"status %d", hst->reg_status);
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return -EAGAIN;
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}
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done:
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hst->st_write = ti_st_proto[i].write;
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if (!hst->st_write) {
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BT_ERR("undefined ST write function");
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clear_bit(HCI_RUNNING, &hdev->flags);
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for (i = 0; i < MAX_BT_CHNL_IDS; i++) {
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/* Undo registration with ST */
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err = st_unregister(&ti_st_proto[i]);
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if (err)
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BT_ERR("st_unregister() failed with "
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"error %d", err);
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hst->st_write = NULL;
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}
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return -EIO;
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}
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}
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return 0;
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}
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/* Close device */
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static int ti_st_close(struct hci_dev *hdev)
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{
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int err, i;
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struct ti_st *hst = hci_get_drvdata(hdev);
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if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
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return 0;
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for (i = MAX_BT_CHNL_IDS-1; i >= 0; i--) {
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err = st_unregister(&ti_st_proto[i]);
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if (err)
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BT_ERR("st_unregister(%d) failed with error %d",
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ti_st_proto[i].chnl_id, err);
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}
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hst->st_write = NULL;
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return err;
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}
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static int ti_st_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
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{
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struct ti_st *hst;
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long len;
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if (!test_bit(HCI_RUNNING, &hdev->flags))
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return -EBUSY;
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hst = hci_get_drvdata(hdev);
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/* Prepend skb with frame type */
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memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1);
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BT_DBG("%s: type %d len %d", hdev->name, bt_cb(skb)->pkt_type,
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skb->len);
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/* Insert skb to shared transport layer's transmit queue.
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* Freeing skb memory is taken care in shared transport layer,
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* so don't free skb memory here.
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*/
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len = hst->st_write(skb);
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if (len < 0) {
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kfree_skb(skb);
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BT_ERR("ST write failed (%ld)", len);
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/* Try Again, would only fail if UART has gone bad */
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return -EAGAIN;
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}
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/* ST accepted our skb. So, Go ahead and do rest */
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hdev->stat.byte_tx += len;
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ti_st_tx_complete(hst, bt_cb(skb)->pkt_type);
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return 0;
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}
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static int bt_ti_probe(struct platform_device *pdev)
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{
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static struct ti_st *hst;
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struct hci_dev *hdev;
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int err;
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hst = devm_kzalloc(&pdev->dev, sizeof(struct ti_st), GFP_KERNEL);
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if (!hst)
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return -ENOMEM;
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/* Expose "hciX" device to user space */
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hdev = hci_alloc_dev();
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if (!hdev)
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return -ENOMEM;
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BT_DBG("hdev %p", hdev);
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hst->hdev = hdev;
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hdev->bus = HCI_UART;
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hci_set_drvdata(hdev, hst);
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hdev->open = ti_st_open;
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hdev->close = ti_st_close;
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hdev->flush = NULL;
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hdev->send = ti_st_send_frame;
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err = hci_register_dev(hdev);
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if (err < 0) {
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BT_ERR("Can't register HCI device error %d", err);
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hci_free_dev(hdev);
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return err;
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}
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BT_DBG("HCI device registered (hdev %p)", hdev);
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dev_set_drvdata(&pdev->dev, hst);
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return err;
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}
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static int bt_ti_remove(struct platform_device *pdev)
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{
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struct hci_dev *hdev;
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struct ti_st *hst = dev_get_drvdata(&pdev->dev);
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if (!hst)
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return -EFAULT;
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BT_DBG("%s", hst->hdev->name);
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hdev = hst->hdev;
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ti_st_close(hdev);
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hci_unregister_dev(hdev);
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hci_free_dev(hdev);
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dev_set_drvdata(&pdev->dev, NULL);
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return 0;
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}
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static struct platform_driver btwilink_driver = {
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.probe = bt_ti_probe,
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.remove = bt_ti_remove,
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.driver = {
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.name = "btwilink",
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.owner = THIS_MODULE,
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},
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};
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module_platform_driver(btwilink_driver);
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/* ------ Module Info ------ */
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MODULE_AUTHOR("Raja Mani <raja_mani@ti.com>");
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MODULE_DESCRIPTION("Bluetooth Driver for TI Shared Transport" VERSION);
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MODULE_VERSION(VERSION);
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MODULE_LICENSE("GPL");
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