mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-15 13:22:55 +00:00
[Bluetooth] Add generic driver for Bluetooth SDIO devices
This patch adds a generic driver for Bluetooth SDIO devices. It supports Type-A and Type-B devices. Signed-off-by: David Vrabel <david.vrabel@csr.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Marcel Holtmann
David S. Miller
parent
ac019360fe
commit
ddbaf13e36
@ -22,6 +22,17 @@ config BT_HCIUSB_SCO
|
||||
|
||||
Say Y here to compile support for SCO over HCI USB.
|
||||
|
||||
config BT_HCIBTSDIO
|
||||
tristate "HCI SDIO driver"
|
||||
depends on MMC
|
||||
help
|
||||
Bluetooth HCI SDIO driver.
|
||||
This driver is required if you want to use Bluetooth device with
|
||||
SDIO interface.
|
||||
|
||||
Say Y here to compile support for Bluetooth SDIO devices into the
|
||||
kernel or say M to compile it as module (btsdio).
|
||||
|
||||
config BT_HCIUART
|
||||
tristate "HCI UART driver"
|
||||
help
|
||||
|
||||
@ -13,6 +13,8 @@ obj-$(CONFIG_BT_HCIBT3C) += bt3c_cs.o
|
||||
obj-$(CONFIG_BT_HCIBLUECARD) += bluecard_cs.o
|
||||
obj-$(CONFIG_BT_HCIBTUART) += btuart_cs.o
|
||||
|
||||
obj-$(CONFIG_BT_HCIBTSDIO) += btsdio.o
|
||||
|
||||
hci_uart-y := hci_ldisc.o
|
||||
hci_uart-$(CONFIG_BT_HCIUART_H4) += hci_h4.o
|
||||
hci_uart-$(CONFIG_BT_HCIUART_BCSP) += hci_bcsp.o
|
||||
|
||||
406
drivers/bluetooth/btsdio.c
Normal file
406
drivers/bluetooth/btsdio.c
Normal file
@ -0,0 +1,406 @@
|
||||
/*
|
||||
*
|
||||
* Generic Bluetooth SDIO driver
|
||||
*
|
||||
* Copyright (C) 2007 Cambridge Silicon Radio Ltd.
|
||||
* Copyright (C) 2007 Marcel Holtmann <marcel@holtmann.org>
|
||||
*
|
||||
*
|
||||
* 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/module.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/types.h>
|
||||
#include <linux/sched.h>
|
||||
#include <linux/errno.h>
|
||||
#include <linux/skbuff.h>
|
||||
|
||||
#include <linux/mmc/sdio_ids.h>
|
||||
#include <linux/mmc/sdio_func.h>
|
||||
|
||||
#include <net/bluetooth/bluetooth.h>
|
||||
#include <net/bluetooth/hci_core.h>
|
||||
|
||||
#ifndef CONFIG_BT_HCIBTSDIO_DEBUG
|
||||
#undef BT_DBG
|
||||
#define BT_DBG(D...)
|
||||
#endif
|
||||
|
||||
#define VERSION "0.1"
|
||||
|
||||
static const struct sdio_device_id btsdio_table[] = {
|
||||
/* Generic Bluetooth Type-A SDIO device */
|
||||
{ SDIO_DEVICE_CLASS(SDIO_CLASS_BT_A) },
|
||||
|
||||
/* Generic Bluetooth Type-B SDIO device */
|
||||
{ SDIO_DEVICE_CLASS(SDIO_CLASS_BT_B) },
|
||||
|
||||
{ } /* Terminating entry */
|
||||
};
|
||||
|
||||
MODULE_DEVICE_TABLE(sdio, btsdio_table);
|
||||
|
||||
struct btsdio_data {
|
||||
struct hci_dev *hdev;
|
||||
struct sdio_func *func;
|
||||
|
||||
struct work_struct work;
|
||||
|
||||
struct sk_buff_head txq;
|
||||
};
|
||||
|
||||
#define REG_RDAT 0x00 /* Receiver Data */
|
||||
#define REG_TDAT 0x00 /* Transmitter Data */
|
||||
#define REG_PC_RRT 0x10 /* Read Packet Control */
|
||||
#define REG_PC_WRT 0x11 /* Write Packet Control */
|
||||
#define REG_RTC_STAT 0x12 /* Retry Control Status */
|
||||
#define REG_RTC_SET 0x12 /* Retry Control Set */
|
||||
#define REG_INTRD 0x13 /* Interrupt Indication */
|
||||
#define REG_CL_INTRD 0x13 /* Interrupt Clear */
|
||||
#define REG_EN_INTRD 0x14 /* Interrupt Enable */
|
||||
#define REG_MD_STAT 0x20 /* Bluetooth Mode Status */
|
||||
|
||||
static int btsdio_tx_packet(struct btsdio_data *data, struct sk_buff *skb)
|
||||
{
|
||||
int err;
|
||||
|
||||
BT_DBG("%s", data->hdev->name);
|
||||
|
||||
/* Prepend Type-A header */
|
||||
skb_push(skb, 4);
|
||||
skb->data[0] = (skb->len & 0x0000ff);
|
||||
skb->data[1] = (skb->len & 0x00ff00) >> 8;
|
||||
skb->data[2] = (skb->len & 0xff0000) >> 16;
|
||||
skb->data[3] = bt_cb(skb)->pkt_type;
|
||||
|
||||
err = sdio_writesb(data->func, REG_TDAT, skb->data, skb->len);
|
||||
if (err < 0) {
|
||||
sdio_writeb(data->func, 0x01, REG_PC_WRT, NULL);
|
||||
return err;
|
||||
}
|
||||
|
||||
data->hdev->stat.byte_tx += skb->len;
|
||||
|
||||
kfree_skb(skb);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void btsdio_work(struct work_struct *work)
|
||||
{
|
||||
struct btsdio_data *data = container_of(work, struct btsdio_data, work);
|
||||
struct sk_buff *skb;
|
||||
int err;
|
||||
|
||||
BT_DBG("%s", data->hdev->name);
|
||||
|
||||
sdio_claim_host(data->func);
|
||||
|
||||
while ((skb = skb_dequeue(&data->txq))) {
|
||||
err = btsdio_tx_packet(data, skb);
|
||||
if (err < 0) {
|
||||
data->hdev->stat.err_tx++;
|
||||
skb_queue_head(&data->txq, skb);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
sdio_release_host(data->func);
|
||||
}
|
||||
|
||||
static int btsdio_rx_packet(struct btsdio_data *data)
|
||||
{
|
||||
u8 hdr[4] __attribute__ ((aligned(4)));
|
||||
struct sk_buff *skb;
|
||||
int err, len;
|
||||
|
||||
BT_DBG("%s", data->hdev->name);
|
||||
|
||||
err = sdio_readsb(data->func, hdr, REG_RDAT, 4);
|
||||
if (err < 0)
|
||||
return err;
|
||||
|
||||
len = hdr[0] | (hdr[1] << 8) | (hdr[2] << 16);
|
||||
if (len < 4 || len > 65543)
|
||||
return -EILSEQ;
|
||||
|
||||
skb = bt_skb_alloc(len - 4, GFP_KERNEL);
|
||||
if (!skb) {
|
||||
/* Out of memory. Prepare a read retry and just
|
||||
* return with the expectation that the next time
|
||||
* we're called we'll have more memory. */
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
skb_put(skb, len - 4);
|
||||
|
||||
err = sdio_readsb(data->func, skb->data, REG_RDAT, len - 4);
|
||||
if (err < 0) {
|
||||
kfree(skb);
|
||||
return err;
|
||||
}
|
||||
|
||||
data->hdev->stat.byte_rx += len;
|
||||
|
||||
skb->dev = (void *) data->hdev;
|
||||
bt_cb(skb)->pkt_type = hdr[3];
|
||||
|
||||
err = hci_recv_frame(skb);
|
||||
if (err < 0) {
|
||||
kfree(skb);
|
||||
return err;
|
||||
}
|
||||
|
||||
sdio_writeb(data->func, 0x00, REG_PC_RRT, NULL);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void btsdio_interrupt(struct sdio_func *func)
|
||||
{
|
||||
struct btsdio_data *data = sdio_get_drvdata(func);
|
||||
int intrd;
|
||||
|
||||
BT_DBG("%s", data->hdev->name);
|
||||
|
||||
intrd = sdio_readb(func, REG_INTRD, NULL);
|
||||
if (intrd & 0x01) {
|
||||
sdio_writeb(func, 0x01, REG_CL_INTRD, NULL);
|
||||
|
||||
if (btsdio_rx_packet(data) < 0) {
|
||||
data->hdev->stat.err_rx++;
|
||||
sdio_writeb(data->func, 0x01, REG_PC_RRT, NULL);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static int btsdio_open(struct hci_dev *hdev)
|
||||
{
|
||||
struct btsdio_data *data = hdev->driver_data;
|
||||
int err;
|
||||
|
||||
BT_DBG("%s", hdev->name);
|
||||
|
||||
if (test_and_set_bit(HCI_RUNNING, &hdev->flags))
|
||||
return 0;
|
||||
|
||||
sdio_claim_host(data->func);
|
||||
|
||||
err = sdio_enable_func(data->func);
|
||||
if (err < 0) {
|
||||
clear_bit(HCI_RUNNING, &hdev->flags);
|
||||
goto release;
|
||||
}
|
||||
|
||||
err = sdio_claim_irq(data->func, btsdio_interrupt);
|
||||
if (err < 0) {
|
||||
sdio_disable_func(data->func);
|
||||
clear_bit(HCI_RUNNING, &hdev->flags);
|
||||
goto release;
|
||||
}
|
||||
|
||||
if (data->func->class == SDIO_CLASS_BT_B)
|
||||
sdio_writeb(data->func, 0x00, REG_MD_STAT, NULL);
|
||||
|
||||
sdio_writeb(data->func, 0x01, REG_EN_INTRD, NULL);
|
||||
|
||||
release:
|
||||
sdio_release_host(data->func);
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
static int btsdio_close(struct hci_dev *hdev)
|
||||
{
|
||||
struct btsdio_data *data = hdev->driver_data;
|
||||
|
||||
BT_DBG("%s", hdev->name);
|
||||
|
||||
if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
|
||||
return 0;
|
||||
|
||||
sdio_claim_host(data->func);
|
||||
|
||||
sdio_writeb(data->func, 0x00, REG_EN_INTRD, NULL);
|
||||
|
||||
sdio_release_irq(data->func);
|
||||
sdio_disable_func(data->func);
|
||||
|
||||
sdio_release_host(data->func);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int btsdio_flush(struct hci_dev *hdev)
|
||||
{
|
||||
struct btsdio_data *data = hdev->driver_data;
|
||||
|
||||
BT_DBG("%s", hdev->name);
|
||||
|
||||
skb_queue_purge(&data->txq);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int btsdio_send_frame(struct sk_buff *skb)
|
||||
{
|
||||
struct hci_dev *hdev = (struct hci_dev *) skb->dev;
|
||||
struct btsdio_data *data = hdev->driver_data;
|
||||
|
||||
BT_DBG("%s", hdev->name);
|
||||
|
||||
if (!test_bit(HCI_RUNNING, &hdev->flags))
|
||||
return -EBUSY;
|
||||
|
||||
switch (bt_cb(skb)->pkt_type) {
|
||||
case HCI_COMMAND_PKT:
|
||||
hdev->stat.cmd_tx++;
|
||||
break;
|
||||
|
||||
case HCI_ACLDATA_PKT:
|
||||
hdev->stat.acl_tx++;
|
||||
break;
|
||||
|
||||
case HCI_SCODATA_PKT:
|
||||
hdev->stat.sco_tx++;
|
||||
break;
|
||||
|
||||
default:
|
||||
return -EILSEQ;
|
||||
}
|
||||
|
||||
skb_queue_tail(&data->txq, skb);
|
||||
|
||||
schedule_work(&data->work);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void btsdio_destruct(struct hci_dev *hdev)
|
||||
{
|
||||
struct btsdio_data *data = hdev->driver_data;
|
||||
|
||||
BT_DBG("%s", hdev->name);
|
||||
|
||||
kfree(data);
|
||||
}
|
||||
|
||||
static int btsdio_probe(struct sdio_func *func,
|
||||
const struct sdio_device_id *id)
|
||||
{
|
||||
struct btsdio_data *data;
|
||||
struct hci_dev *hdev;
|
||||
struct sdio_func_tuple *tuple = func->tuples;
|
||||
int err;
|
||||
|
||||
BT_DBG("func %p id %p class 0x%04x", func, id, func->class);
|
||||
|
||||
while (tuple) {
|
||||
BT_DBG("code 0x%x size %d", tuple->code, tuple->size);
|
||||
tuple = tuple->next;
|
||||
}
|
||||
|
||||
data = kzalloc(sizeof(*data), GFP_KERNEL);
|
||||
if (!data)
|
||||
return -ENOMEM;
|
||||
|
||||
data->func = func;
|
||||
|
||||
INIT_WORK(&data->work, btsdio_work);
|
||||
|
||||
skb_queue_head_init(&data->txq);
|
||||
|
||||
hdev = hci_alloc_dev();
|
||||
if (!hdev) {
|
||||
kfree(data);
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
hdev->type = HCI_SDIO;
|
||||
hdev->driver_data = data;
|
||||
|
||||
data->hdev = hdev;
|
||||
|
||||
SET_HCIDEV_DEV(hdev, &func->dev);
|
||||
|
||||
hdev->open = btsdio_open;
|
||||
hdev->close = btsdio_close;
|
||||
hdev->flush = btsdio_flush;
|
||||
hdev->send = btsdio_send_frame;
|
||||
hdev->destruct = btsdio_destruct;
|
||||
|
||||
hdev->owner = THIS_MODULE;
|
||||
|
||||
err = hci_register_dev(hdev);
|
||||
if (err < 0) {
|
||||
hci_free_dev(hdev);
|
||||
kfree(data);
|
||||
return err;
|
||||
}
|
||||
|
||||
sdio_set_drvdata(func, data);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void btsdio_remove(struct sdio_func *func)
|
||||
{
|
||||
struct btsdio_data *data = sdio_get_drvdata(func);
|
||||
struct hci_dev *hdev;
|
||||
|
||||
BT_DBG("func %p", func);
|
||||
|
||||
if (!data)
|
||||
return;
|
||||
|
||||
hdev = data->hdev;
|
||||
|
||||
sdio_set_drvdata(func, NULL);
|
||||
|
||||
hci_unregister_dev(hdev);
|
||||
|
||||
hci_free_dev(hdev);
|
||||
}
|
||||
|
||||
static struct sdio_driver btsdio_driver = {
|
||||
.name = "btsdio",
|
||||
.probe = btsdio_probe,
|
||||
.remove = btsdio_remove,
|
||||
.id_table = btsdio_table,
|
||||
};
|
||||
|
||||
static int __init btsdio_init(void)
|
||||
{
|
||||
BT_INFO("Generic Bluetooth SDIO driver ver %s", VERSION);
|
||||
|
||||
return sdio_register_driver(&btsdio_driver);
|
||||
}
|
||||
|
||||
static void __exit btsdio_exit(void)
|
||||
{
|
||||
sdio_unregister_driver(&btsdio_driver);
|
||||
}
|
||||
|
||||
module_init(btsdio_init);
|
||||
module_exit(btsdio_exit);
|
||||
|
||||
MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
|
||||
MODULE_DESCRIPTION("Generic Bluetooth SDIO driver ver " VERSION);
|
||||
MODULE_VERSION(VERSION);
|
||||
MODULE_LICENSE("GPL");
|
||||
Loading…
Reference in New Issue
Block a user