On Thursday 20 December 2012 20:52:51 Larry Finger wrote:
> This new driver works with the RTL8723AE wireless/BT combo device. The
> corresponding firmware has been submitted to linux-firmware.
>
> Signed-off-by: Champion Chen <champion_chen@xxxxxxxxxxxxxx>
> Signed-off-by: Larry Finger <Larry.Finger@xxxxxxxxxxxx>
> ---
> drivers/bluetooth/Kconfig | 10 +
> drivers/bluetooth/Makefile | 1 +
> drivers/bluetooth/rtk_btusb.c | 1649 +++++++++++++++++++++++++++++++++++++++++
> 3 files changed, 1660 insertions(+)
> create mode 100644 drivers/bluetooth/rtk_btusb.c
>
> diff --git a/drivers/bluetooth/Kconfig b/drivers/bluetooth/Kconfig
> index e9f203e..efd3766 100644
> --- a/drivers/bluetooth/Kconfig
> +++ b/drivers/bluetooth/Kconfig
> @@ -241,4 +241,14 @@ config BT_WILINK
>
> Say Y here to compile support for Texas Instrument's WiLink7 driver
> into the kernel or say M to compile it as module.
> +
> +config BT_RTKUSB
> + tristate "Realtek BT driver for RTL8723AE"
> + select FW_LOADER
> + help
> + This enables the Bluetooth driver for the Realtek RTL8723AE Wifi/BT
> + combo device.
> +
> + Say Y here to compile support for these devices into the kernel
> + or say M to build it as a module.
> endmenu
> diff --git a/drivers/bluetooth/Makefile b/drivers/bluetooth/Makefile
> index 4afae20..167ccc0 100644
> --- a/drivers/bluetooth/Makefile
> +++ b/drivers/bluetooth/Makefile
> @@ -19,6 +19,7 @@ obj-$(CONFIG_BT_ATH3K) += ath3k.o
> obj-$(CONFIG_BT_MRVL) += btmrvl.o
> obj-$(CONFIG_BT_MRVL_SDIO) += btmrvl_sdio.o
> obj-$(CONFIG_BT_WILINK) += btwilink.o
> +obj-$(CONFIG_BT_RTKUSB) += rtk_btusb.o
>
> btmrvl-y := btmrvl_main.o
> btmrvl-$(CONFIG_DEBUG_FS) += btmrvl_debugfs.o
> diff --git a/drivers/bluetooth/rtk_btusb.c b/drivers/bluetooth/rtk_btusb.c
> new file mode 100644
> index 0000000..31c128a
> --- /dev/null
> +++ b/drivers/bluetooth/rtk_btusb.c
> @@ -0,0 +1,1650 @@
> +/*
> + *
> + * Realtek Bluetooth USB driver
> + *
> + * Copyright (C) 2012-2015 Edward Bian <edward_bian@xxxxxxxxxxxxxx>
> + *
> + *
> + * 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/usb.h>
> +#include <linux/completion.h>
> +#include <net/bluetooth/bluetooth.h>
> +#include <net/bluetooth/hci_core.h>
> +
> +#define VERSION "0.8"
> +
> +static struct usb_driv> diff --git a/drivers/bluetooth/Kconfig b/drivers/bluetooth/Kconfig
> index e9f203e..efd3766 100644
> +static struct usb_driver btusb_driver;
> +#if 1
> +#define RTKBT_DBG(fmt, arg...) pr_info("rtk_btusb: " fmt "\n" , ## arg)
No new debug macros please.
> +
> +static int btusb_open(struct hci_dev *hdev)
> +{
> + struct btusb_data *data = GET_DRV_DATA(hdev);
> + int err;
> +
> + err = usb_autopm_get_interface(data->intf);
> + if (err < 0)
> + return err;
> +
> + data->intf->needs_remote_wakeup = 1;
> + RTKBT_DBG("%s start pm_usage_cnt(0x%x)", __func__,
> + atomic_read(&(data->intf->pm_usage_cnt)));
> +
> + /*******************************/
> + if (0 == atomic_read(&hdev->promisc)) {
> + RTKBT_DBG("btusb_open hdev->promisc == 0");
> + err = -1;
This makes no sense
> + }
> + err = download_patch(data->intf);
> + if (err < 0)
> + goto failed;
On every open?
> + /*******************************/
> +
> + if (test_and_set_bit(HCI_RUNNING, &hdev->flags))
> + goto done;
> +
> + if (test_and_set_bit(BTUSB_INTR_RUNNING, &data->flags))
> + goto done;
> +
> + err = btusb_submit_intr_urb(hdev, GFP_KERNEL);
> + if (err < 0)
> + goto failed;
> +
> + err = btusb_submit_bulk_urb(hdev, GFP_KERNEL);
> + if (err < 0) {
> + mdelay(URB_CANCELING_DELAY_MS); /* Added by Realtek */
> + usb_kill_anchored_urbs(&data->intr_anchor);
> + goto failed;
> + }
> +
> + set_bit(BTUSB_BULK_RUNNING, &data->flags);
> + btusb_submit_bulk_urb(hdev, GFP_KERNEL);
> +
> +done:
> + usb_autopm_put_interface(data->intf);
> + RTKBT_DBG("%s end pm_usage_cnt(0x%x)", __func__,
> + atomic_read(&(data->intf->pm_usage_cnt)));
> +
> + return 0;
> +
> +failed:
> + clear_bit(BTUSB_INTR_RUNNING, &data->flags);
> + clear_bit(HCI_RUNNING, &hdev->flags);
> + usb_autopm_put_interface(data->intf);
> + RTKBT_DBG("%s failed pm_usage_cnt(0x%x)", __func__,
> + atomic_read(&(data->intf->pm_usage_cnt)));
> + return err;
> +}
> +
> +static void btusb_stop_traffic(struct btusb_data *data)
> +{
> + mdelay(URB_CANCELING_DELAY_MS); /* Added by Realtek */
> + usb_kill_anchored_urbs(&data->intr_anchor);
> + usb_kill_anchored_urbs(&data->bulk_anchor);
> + usb_kill_anchored_urbs(&data->isoc_anchor);
> +}
> +
> +static int btusb_close(struct hci_dev *hdev)
> +{
> + struct btusb_data *data = GET_DRV_DATA(hdev);
> + int i, err;
> +
> + if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
> + return 0;
> +
> + RTKBT_DBG("btusb_close");
> + /*******************************/
> + for (i = 0; i < NUM_REASSEMBLY; i++) {
> + if (hdev->reassembly[i]) {
> + kfree_skb(hdev->reassembly[i]);
> + hdev->reassembly[i] = NULL;
> + RTKBT_DBG("%s free ressembly i =%d", __func__, i);
> + }
> + }
> + /*******************************/
> + cancel_work_sync(&data->work);
> + cancel_work_sync(&data->waker);
> +
> + clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
> + clear_bit(BTUSB_BULK_RUNNING, &data->flags);
> + clear_bit(BTUSB_INTR_RUNNING, &data->flags);
> +
> + btusb_stop_traffic(data);
> + err = usb_autopm_get_interface(data->intf);
> + if (err < 0)
> + goto failed;
> +
> + data->intf->needs_remote_wakeup = 0;
> + usb_autopm_put_interface(data->intf);
> +
> +failed:
> + mdelay(URB_CANCELING_DELAY_MS); /* Added by Realtek */
This makes no sense. Those URBs never went over the wire.
> + usb_scuttle_anchored_urbs(&data->deferred);
> + return 0;
> +}
> +
> +static int btusb_flush(struct hci_dev *hdev)
> +{
> + struct btusb_data *data = GET_DRV_DATA(hdev);
> +
> + RTKBT_DBG("%s add delay ", __func__);
> + mdelay(URB_CANCELING_DELAY_MS); /* Added by Realtek */
> + usb_kill_anchored_urbs(&data->tx_anchor);
> +
> + return 0;
> +}
> +
> +
> +static void btusb_work(struct work_struct *work)
> +{
> + struct btusb_data *data = container_of(work, struct btusb_data, work);
> + struct hci_dev *hdev = data->hdev;
> + int err;
> +
> + if (hdev->conn_hash.sco_num > 0) {
> + if (!test_bit(BTUSB_DID_ISO_RESUME, &data->flags)) {
> + err = usb_autopm_get_interface(data->isoc ? data->isoc :
> + data->intf);
> + if (err < 0) {
> + clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
> + /* Delay added by Realtek */
> + mdelay(URB_CANCELING_DELAY_MS);
> + usb_kill_anchored_urbs(&data->isoc_anchor);
> + return;
> + }
> +
> + set_bit(BTUSB_DID_ISO_RESUME, &data->flags);
> + }
> + if (data->isoc_altsetting != 2) {
> + clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
> + mdelay(URB_CANCELING_DELAY_MS); /* Added by Realtek */
> + usb_kill_anchored_urbs(&data->isoc_anchor);
> +
> + if (__set_isoc_interface(hdev, 2) < 0)
> + return;
> + }
> +
> + if (!test_and_set_bit(BTUSB_ISOC_RUNNING, &data->flags)) {
> + if (btusb_submit_isoc_urb(hdev, GFP_KERNEL) < 0)
> + clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
> + else
> + btusb_submit_isoc_urb(hdev, GFP_KERNEL);
> + }
> + } else {
> + clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
> + mdelay(URB_CANCELING_DELAY_MS); /* Added by Realtek */
> + usb_kill_anchored_urbs(&data->isoc_anchor);
> +
> + __set_isoc_interface(hdev, 0);
> + if (test_and_clear_bit(BTUSB_DID_ISO_RESUME, &data->flags))
> + usb_autopm_put_interface(data->isoc ? data->isoc :
> + data->intf);
> + }
> +}
> +static int btusb_probe(struct usb_interface *intf,
> + const struct usb_device_id *id)
> +{
> + struct usb_endpoint_descriptor *ep_desc;
> + struct btusb_data *data;
> + struct hci_dev *hdev;
> + int i, err, flag1, flag2;
> + struct usb_device *udev;
> + udev = interface_to_usbdev(intf);
> +
> + /* interface numbers are hardcoded in the spec */
> + if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
> + return -ENODEV;
> +
> + /*******************************/
> + flag1 = device_can_wakeup(&udev->dev);
> + flag2 = device_may_wakeup(&udev->dev);
> + RTKBT_DBG("btusb_probe 1 ========== can_wakeup =%x flag2 =%x",
> + flag1, flag2);
> + device_wakeup_disable(&udev->dev);
Why?
> + flag1 = device_can_wakeup(&udev->dev);
> + flag2 = device_may_wakeup(&udev->dev);
> + RTKBT_DBG("wakeup_disable ========== can_wakeup =%x flag2 =%x",
> + flag1, flag2);
> + err = patch_add(intf);
> + if (err < 0)
> + return -1;
> + /*******************************/
> +
> + data = kzalloc(sizeof(*data), GFP_KERNEL);
> + if (!data)
> + return -ENOMEM;
> +
> +
> + for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
> + ep_desc = &intf->cur_altsetting->endpoint[i].desc;
> +
> + if (!data->intr_ep && usb_endpoint_is_int_in(ep_desc)) {
> + data->intr_ep = ep_desc;
> + continue;
> + }
> +
> + if (!data->bulk_tx_ep && usb_endpoint_is_bulk_out(ep_desc)) {
> + data->bulk_tx_ep = ep_desc;
> + continue;
> + }
> +
> + if (!data->bulk_rx_ep && usb_endpoint_is_bulk_in(ep_desc)) {
> + data->bulk_rx_ep = ep_desc;
> + continue;
> + }
> + }
> +
> + if (!data->intr_ep || !data->bulk_tx_ep || !data->bulk_rx_ep) {
> + kfree(data);
> + return -ENODEV;
> + }
> +
> + data->cmdreq_type = USB_TYPE_CLASS;
> +
> + data->udev = interface_to_usbdev(intf);
> + data->intf = intf;
> +
> + spin_lock_init(&data->lock);
> +
> + INIT_WORK(&data->work, btusb_work);
> + INIT_WORK(&data->waker, btusb_waker);
> + spin_lock_init(&data->txlock);
> +
> + init_usb_anchor(&data->tx_anchor);
> + init_usb_anchor(&data->intr_anchor);
> + init_usb_anchor(&data->bulk_anchor);
> + init_usb_anchor(&data->isoc_anchor);
> + init_usb_anchor(&data->deferred);
> +
> + hdev = hci_alloc_dev();
> + if (!hdev) {
> + kfree(data);
> + return -ENOMEM;
> + }
> +
> + HDEV_BUS = HCI_USB;
> +
> + data->hdev = hdev;
> +
> + SET_HCIDEV_DEV(hdev, &intf->dev);
> +
> + hdev->open = btusb_open;
> + hdev->close = btusb_close;
> + hdev->flush = btusb_flush;
> + hdev->send = btusb_send_frame;
> + hdev->notify = btusb_notify;
> +
> +
> + hci_set_drvdata(hdev, data);
> +
> + /* Interface numbers are hardcoded in the specification */
> + data->isoc = usb_ifnum_to_if(data->udev, 1);
> +
> + if (data->isoc) {
> + err = usb_driver_claim_interface(&btusb_driver,
> + data->isoc, data);
> + if (err < 0) {
> + hci_free_dev(hdev);
> + kfree(data);
> + return err;
> + }
> + }
> +
> + err = hci_register_dev(hdev);
> + if (err < 0) {
> + hci_free_dev(hdev);
> + kfree(data);
> + return err;
> + }
> +
> + usb_set_intfdata(intf, data);
> +
> + return 0;
> +}
> +
> +static void btusb_disconnect(struct usb_interface *intf)
> +{
> + struct btusb_data *data = usb_get_intfdata(intf);
> + struct hci_dev *hdev;
> + struct usb_device *udev;
> + udev = interface_to_usbdev(intf);
> +
> + if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
> + return;
> +
> + if (!data)
> + return;
> +
> + RTKBT_DBG("btusb_disconnect");
> + /*******************************/
> + patch_remove(intf);
This is a race. The device is not dead at this time.
> + /*******************************/
> +
> + hdev = data->hdev;
> +
> + usb_set_intfdata(data->intf, NULL);
> +
> + if (data->isoc)
> + usb_set_intfdata(data->isoc, NULL);
> +
> + hci_unregister_dev(hdev);
> +
> + if (intf == data->isoc)
> + usb_driver_release_interface(&btusb_driver, data->intf);
> + else if (data->isoc)
> + usb_driver_release_interface(&btusb_driver, data->isoc);
> +
> + hci_free_dev(hdev);
> + kfree(data);
> +}
> +
> +#ifdef CONFIG_PM
> +static int btusb_suspend(struct usb_interface *intf, pm_message_t message)
> +{
> + struct btusb_data *data = usb_get_intfdata(intf);
> +
> + if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
> + return 0;
> +
> + /*******************************/
> + RTKBT_DBG("btusb_suspend message.event = 0x%x, data->suspend_count =%d",
> + message.event, data->suspend_count);
> + if (!test_bit(HCI_RUNNING, &data->hdev->flags)) {
> + RTKBT_DBG("btusb_suspend-----bt is off");
> + set_btoff(data->intf);
Why repeat this if the device is already suspended?
> + }
> + /*******************************/
> +
> + if (data->suspend_count++)
> + return 0;
> +
> + spin_lock_irq(&data->txlock);
> + if (!((message.event & PM_EVENT_AUTO) && data->tx_in_flight)) {
> + set_bit(BTUSB_SUSPENDING, &data->flags);
> + spin_unlock_irq(&data->txlock);
> + } else {
> + spin_unlock_irq(&data->txlock);
> + data->suspend_count--;
> + return -EBUSY;
> + }
> +
> + cancel_work_sync(&data->work);
> +
> + btusb_stop_traffic(data);
> + mdelay(URB_CANCELING_DELAY_MS); /* Added by Realtek */
> + usb_kill_anchored_urbs(&data->tx_anchor);
> +
> + return 0;
> +}
> +
> +static void play_deferred(struct btusb_data *data)
> +{
> + struct urb *urb;
> + int err;
> +
> + while ((urb = usb_get_from_anchor(&data->deferred))) {
> +
> + /************************************/
> + usb_anchor_urb(urb, &data->tx_anchor);
> + err = usb_submit_urb(urb, GFP_ATOMIC);
> + if (err < 0) {
> + BT_ERR("play_deferred urb %p submission failed", urb);
> + kfree(urb->setup_packet);
> + usb_unanchor_urb(urb);
> + } else {
> + usb_mark_last_busy(data->udev);
> + }
> + usb_free_urb(urb);
> + /************************************/
> + data->tx_in_flight++;
> + }
> + mdelay(URB_CANCELING_DELAY_MS); /* Added by Realtek */
These URBs never went over the wire. Why a delay?
> + usb_scuttle_anchored_urbs(&data->deferred);
> +}
> +
> +static int btusb_resume(struct usb_interface *intf)
> +{
> + struct btusb_data *data = usb_get_intfdata(intf);
> + struct hci_dev *hdev = data->hdev;
> + int err = 0;
> +
> + if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
> + return 0;
> +
> +
> + /*******************************/
> + RTKBT_DBG("btusb_resume data->suspend_count =%d", data->suspend_count);
> +
> + if (!test_bit(HCI_RUNNING, &hdev->flags)) {
> + RTKBT_DBG("btusb_resume-----bt is off, download patch");
> + download_patch(intf);
> + } else {
> + RTKBT_DBG("btusb_resume,----bt is on");
> + }
> + /*******************************/
> + if (--data->suspend_count)
> + return 0;
> +
> + if (test_bit(BTUSB_INTR_RUNNING, &data->flags)) {
> + err = btusb_submit_intr_urb(hdev, GFP_NOIO);
> + if (err < 0) {
> + clear_bit(BTUSB_INTR_RUNNING, &data->flags);
> + goto failed;
> + }
> + }
> +
> + if (test_bit(BTUSB_BULK_RUNNING, &data->flags)) {
> + err = btusb_submit_bulk_urb(hdev, GFP_NOIO);
> + if (err < 0) {
> + clear_bit(BTUSB_BULK_RUNNING, &data->flags);
> + goto failed;
> + }
> +
> + btusb_submit_bulk_urb(hdev, GFP_NOIO);
> + }
> +
> + if (test_bit(BTUSB_ISOC_RUNNING, &data->flags)) {
> + if (btusb_submit_isoc_urb(hdev, GFP_NOIO) < 0)
> + clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
> + else
> + btusb_submit_isoc_urb(hdev, GFP_NOIO);
> + }
> +
> + spin_lock_irq(&data->txlock);
> + play_deferred(data);
> + clear_bit(BTUSB_SUSPENDING, &data->flags);
> + spin_unlock_irq(&data->txlock);
> + schedule_work(&data->work);
> +
> + return 0;
> +
> +failed:
> + mdelay(URB_CANCELING_DELAY_MS); /* Added by Realtek */
Again, why?
> + usb_scuttle_anchored_urbs(&data->deferred);
> +/* done: */
> + spin_lock_irq(&data->txlock);
> + clear_bit(BTUSB_SUSPENDING, &data->flags);
> + spin_unlock_irq(&data->txlock);
> +
> + return err;
> +}
> +#endif
> +
> +static struct usb_driver btusb_driver = {
> + .name = "rtk_btusb",
> + .probe = btusb_probe,
> + .disconnect = btusb_disconnect,
> +#ifdef CONFIG_PM
> + .suspend = btusb_suspend,
> + .resume = btusb_resume,
> +#endif
> + .id_table = btusb_table,
> + .supports_autosuspend = 1,
> +};
> +
> +static int __init btusb_init(void)
> +{
> + RTKBT_DBG("Realtek Bluetooth USB driver ver %s", VERSION);
> +
> + return usb_register(&btusb_driver);
> +}
> +
> +static void __exit btusb_exit(void)
> +{
> + usb_deregister(&btusb_driver);
> +}
> +
> +module_init(btusb_init);
> +module_exit(btusb_exit);
> +
> +MODULE_AUTHOR("Edward Bian <edward_bian@xxxxxxxxxxxxxx>");
> +MODULE_DESCRIPTION("Realtek Bluetooth USB driver ver " VERSION);
> +MODULE_VERSION(VERSION);
> +MODULE_LICENSE("GPL");
> +MODULE_FIRMWARE("rtl_bt/rtl8723a.bin");
> +
> +/*******************************
> +** Reasil patch code
> +********************************/
> +
> +
> +#include <linux/firmware.h>
> +#include <linux/suspend.h>
> +#include <net/bluetooth/hci.h>
> +
> +
> +#define CMD_CMP_EVT 0x0e
> +#define PKT_LEN 300
> +#define MSG_TO 1000
> +#define PATCH_SEG_MAX 252
> +#define DATA_END 0x80
> +#define DOWNLOAD_OPCODE 0xfc20
> +#define BTOFF_OPCODE 0xfc28
> +#define TRUE 1
> +#define FALSE 0
> +#define CMD_HDR_LEN sizeof(struct hci_command_hdr)
> +#define EVT_HDR_LEN sizeof(struct hci_event_hdr)
> +#define CMD_CMP_LEN sizeof(struct hci_ev_cmd_complete)
> +
> +
> +enum rtk_endpoit {
> + CTRL_EP = 0,
> + INTR_EP = 1,
> + BULK_EP = 2,
> + ISOC_EP = 3
> +};
> +
> +struct patch_info {
> + uint16_t prod_id;
> + uint16_t lmp_sub;
> + char *patch_name;
> + char *config_name;
> + uint8_t *fw_cache;
> + int fw_len;
> +};
> +
> +struct xchange_data {
> + struct dev_data *dev_entry;
> + int pipe_in, pipe_out;
> + uint8_t send_pkt[PKT_LEN];
> + uint8_t rcv_pkt[PKT_LEN];
Violations of the DMA coherency rules, fails on non-x86
> + struct hci_command_hdr *cmd_hdr;
> + struct hci_event_hdr *evt_hdr;
> + struct hci_ev_cmd_complete *cmd_cmp;
> + uint8_t *req_para, *rsp_para;
> + uint8_t *fw_data;
> + int pkt_len, fw_len;
> +};
> +
> +struct dev_data {
> + struct list_head list_node;
> + struct usb_interface *intf;
> + struct usb_device *udev;
> + struct notifier_block pm_notifier;
> + struct patch_info *patch_entry;
> + struct xchange_data xdata;
> + struct completion firmware_loading_complete;
> + const struct firmware *fw;
> +};
> +
> +struct download_cp {
> + uint8_t index;
> + uint8_t data[PATCH_SEG_MAX];
DMA coherency
> +} __packed;
> +
> +struct download_rp {
> + uint8_t status;
> + uint8_t index;
> +} __packed;
> +
> +
> +static struct dev_data *dev_data_find(struct usb_interface *intf);
> +static struct patch_info *get_patch_entry(struct usb_device *udev);
> +static int rtkbt_pm_notify(struct notifier_block *notifier, ulong pm_event,
> + void *unused);
> +static int load_firmware(struct dev_data *dev_entry, uint8_t **buff);
> +static void init_xdata(struct xchange_data *xdata, struct dev_data *dev_entry);
> +static int check_fw_version(struct xchange_data *xdata);
> +static int get_firmware(struct xchange_data *xdata);
> +static int download_data(struct xchange_data *xdata);
> +static int send_hci_cmd(struct xchange_data *xdata);
> +static int rcv_hci_evt(struct xchange_data *xdata);
> +
> +
> +static struct patch_info patch_table[] = {
> + {0, 0x1200, "rtl_bt/rtl8723a.bin", "rtk8723_bt_config", NULL, 0}
> +};
> +
> +static LIST_HEAD(dev_data_list);
> +
> +
> +static int patch_add(struct usb_interface *intf)
> +{
> + struct dev_data *dev_entry;
> + struct usb_device *udev;
> +
> + RTKBT_DBG("patch_add");
> + dev_entry = dev_data_find(intf);
> + if (NULL != dev_entry)
> + return -1;
> +
> + udev = interface_to_usbdev(intf);
> +#if BTUSB_RPM
> + RTKBT_DBG("auto suspend is enabled");
> + usb_enable_autosuspend(udev);
> + pm_runtime_set_autosuspend_delay(&(udev->dev), 2000);
There is no good reason to overwrite the system values.
> +#endif
> +
> + dev_entry = kzalloc(sizeof(struct dev_data), GFP_KERNEL);
> + dev_entry->intf = intf;
> + dev_entry->udev = udev;
> + dev_entry->pm_notifier.notifier_call = rtkbt_pm_notify;
> + dev_entry->patch_entry = get_patch_entry(udev);
> + list_add(&dev_entry->list_node, &dev_data_list);
> + register_pm_notifier(&dev_entry->pm_notifier);
> +
> + return 0;
> +}
> +
> +static void patch_remove(struct usb_interface *intf)
> +{
> + struct dev_data *dev_entry;
> + struct usb_device *udev;
> +
> + udev = interface_to_usbdev(intf);
> +#if BTUSB_RPM
> + usb_disable_autosuspend(udev);
> +#endif
> +
> + dev_entry = dev_data_find(intf);
> + if (NULL == dev_entry)
> + return;
> +
> + RTKBT_DBG("patch_remove");
> + list_del(&dev_entry->list_node);
> + unregister_pm_notifier(&dev_entry->pm_notifier);
> + kfree(dev_entry);
> +}
> +
> +static int download_patch(struct usb_interface *intf)
> +{
> + struct dev_data *dev_entry;
> + uint8_t *fw_buf;
> + int ret_val;
> +
> + RTKBT_DBG("download_patch start");
> + dev_entry = dev_data_find(intf);
> + if (NULL == dev_entry) {
> + ret_val = -1;
> + RTKBT_DBG("NULL == dev_entry");
> + goto patch_end;
> + }
> +
> + init_xdata(&dev_entry->xdata, dev_entry);
> + ret_val = check_fw_version(&dev_entry->xdata);
> + if (ret_val != 0)
> + goto patch_end;
> +
> + ret_val = get_firmware(&dev_entry->xdata);
> + if (ret_val < 0) {
> + RTKBT_DBG("get_firmware failed!");
> + goto patch_end;
> + }
> + fw_buf = dev_entry->xdata.fw_data;
> +
> + ret_val = download_data(&dev_entry->xdata);
> + if (ret_val < 0) {
> + RTKBT_DBG("download_data failed!");
> + goto patch_fail;
> + }
> +
> + ret_val = check_fw_version(&dev_entry->xdata);
> + if (ret_val <= 0) {
> + ret_val = -1;
> + goto patch_fail;
> + }
> +
> + ret_val = 0;
> +patch_fail:
> + kfree(fw_buf);
> +patch_end:
> + RTKBT_DBG("Rtk patch end %d", ret_val);
> + return ret_val;
> +}
> +
> +static int set_btoff(struct usb_interface *intf)
> +{
> + struct dev_data *dev_entry;
> + int ret_val;
> +
> + RTKBT_DBG("set_btoff");
> + dev_entry = dev_data_find(intf);
> + if (NULL == dev_entry)
> + return -1;
> +
> + init_xdata(&dev_entry->xdata, dev_entry);
> + dev_entry->xdata.cmd_hdr->opcode = cpu_to_le16(BTOFF_OPCODE);
> + dev_entry->xdata.cmd_hdr->plen = 1;
> + dev_entry->xdata.pkt_len = CMD_HDR_LEN + 1;
> + dev_entry->xdata.send_pkt[CMD_HDR_LEN] = 1;
> +
> + ret_val = send_hci_cmd(&dev_entry->xdata);
> + if (ret_val < 0)
> + return ret_val;
> +
> + ret_val = rcv_hci_evt(&dev_entry->xdata);
> + if (ret_val < 0)
> + return ret_val;
> +
> + RTKBT_DBG("set_btoff done");
> + return 0;
> +}
> +
> +static struct dev_data *dev_data_find(struct usb_interface *intf)
> +{
> + struct dev_data *dev_entry;
> +
> + list_for_each_entry(dev_entry, &dev_data_list, list_node) {
> + if (dev_entry->intf == intf)
> + return dev_entry;
> + }
> +
> + return NULL;
> +}
> +
> +static struct patch_info *get_patch_entry(struct usb_device *udev)
> +{
> + struct patch_info *patch_entry;
> + uint16_t pid;
> +
> + patch_entry = patch_table;
> + pid = le16_to_cpu(udev->descriptor.idProduct);
> + while (pid != patch_entry->prod_id) {
> + if (0 == patch_entry->prod_id)
> + break;
> + patch_entry++;
> + }
> +
> + return patch_entry;
> +}
> +
> +static int rtkbt_pm_notify(struct notifier_block *notifier, ulong pm_event,
> + void *unused)
> +{
> + struct dev_data *dev_entry;
> + struct patch_info *patch_entry;
> + struct usb_device *udev;
> +
> + dev_entry = container_of(notifier, struct dev_data, pm_notifier);
> + patch_entry = dev_entry->patch_entry;
> + udev = dev_entry->udev;
> + RTKBT_DBG("rtkbt_pm_notify pm_event =%ld", pm_event);
> + switch (pm_event) {
> + case PM_SUSPEND_PREPARE:
> + case PM_HIBERNATION_PREPARE:
> + patch_entry->fw_len = load_firmware(dev_entry,
> + &patch_entry->fw_cache);
> + if (patch_entry->fw_len <= 0) {
> + RTKBT_DBG("rtkbt_pm_notify return NOTIFY_BAD");
> + return NOTIFY_BAD;
> + }
> +
> + if (!device_may_wakeup(&udev->dev)) {
> + dev_entry->intf->needs_binding = 1;
> + RTKBT_DBG("remote wakeup not support, set intf->needs_binding = 1");
> + }
> + break;
> +
> + case PM_POST_SUSPEND:
> + case PM_POST_HIBERNATION:
> + case PM_POST_RESTORE:
> + if (patch_entry->fw_len > 0) {
> + kfree(patch_entry->fw_cache);
> + patch_entry->fw_cache = NULL;
> + patch_entry->fw_len = 0;
> + }
> +#if BTUSB_RPM
> + usb_disable_autosuspend(udev);
> + usb_enable_autosuspend(udev);
> + pm_runtime_set_autosuspend_delay(&(udev->dev), 2000);
> +#endif
> + break;
> +
> + default:
> + break;
> + }
> +
> + return NOTIFY_DONE;
> +}
> +
> +static void bt_fw_cb(const struct firmware *firmware, void *context)
> +{
> + struct dev_data *dev_entry = context;
> +
> + dev_entry->fw = firmware;
> + if (!firmware)
> + pr_err("In callback routine, firmware file not available\n");
> + complete(&dev_entry->firmware_loading_complete);
> +}
> +
> +static int load_firmware(struct dev_data *dev_entry, uint8_t **buff)
> +{
> +#if LOAD_CONFIG
> + const struct firmware *fw;
> +#endif
> + struct usb_device *udev;
> + struct patch_info *patch_entry;
> + char *fw_name;
> + int fw_len = 0, ret_val;
> +
> + udev = dev_entry->udev;
> + init_completion(&dev_entry->firmware_loading_complete);
> + patch_entry = dev_entry->patch_entry;
> + fw_name = patch_entry->patch_name;
> + RTKBT_DBG("Reading firmware file %s", fw_name);
> + ret_val = request_firmware_nowait(THIS_MODULE, 1, fw_name, &udev->dev,
> + GFP_KERNEL, dev_entry, bt_fw_cb);
> + if (ret_val < 0)
> + goto fw_fail;
> +
> + wait_for_completion(&dev_entry->firmware_loading_complete);
> + if (!dev_entry->fw)
> + goto fw_fail;
> + *buff = kzalloc(dev_entry->fw->size, GFP_KERNEL);
> + if (NULL == *buff)
> + goto alloc_fail;
> + memcpy(*buff, dev_entry->fw->data, dev_entry->fw->size);
> + fw_len = dev_entry->fw->size;
> +
> +#if LOAD_CONFIG
> + release_firmware(dev_entry->fw);
> + fw_name = patch_entry->config_name;
> + ret_val = request_firmware(&fw, fw_name, &udev->dev);
> + if (ret_val < 0) {
> + fw_len = 0;
> + kfree(*buff);
> + *buff = NULL;
> + goto fw_fail;
> + }
> +
> + *buff = krealloc(*buff, fw_len + fw->size, GFP_KERNEL);
> + if (NULL == *buff) {
> + fw_len = 0;
> + release_firmware(fw);
> + goto fw_fail;
> + }
> + memcpy(*buff + fw_len, fw->data, fw->size);
> + fw_len += fw->size;
> +#endif
> +
> +alloc_fail:
> + release_firmware(dev_entry->fw);
> +fw_fail:
> + return fw_len;
> +}
> +
> +static void init_xdata(struct xchange_data *xdata, struct dev_data *dev_entry)
> +{
> + memset(xdata, 0, sizeof(struct xchange_data));
> + xdata->dev_entry = dev_entry;
> + xdata->pipe_in = usb_rcvintpipe(dev_entry->udev, INTR_EP);
> + xdata->pipe_out = usb_sndctrlpipe(dev_entry->udev, CTRL_EP);
> + xdata->cmd_hdr = (struct hci_command_hdr *)(xdata->send_pkt);
> + xdata->evt_hdr = (struct hci_event_hdr *)(xdata->rcv_pkt);
> + xdata->cmd_cmp = (struct hci_ev_cmd_complete *)(xdata->rcv_pkt +
> + EVT_HDR_LEN);
> + xdata->req_para = xdata->send_pkt + CMD_HDR_LEN;
> + xdata->rsp_para = xdata->rcv_pkt + EVT_HDR_LEN + CMD_CMP_LEN;
> +}
> +
> +static int check_fw_version(struct xchange_data *xdata)
> +{
> + struct hci_rp_read_local_version *read_ver_rsp;
> + struct patch_info *patch_entry;
> + int ret_val;
> +
> + xdata->cmd_hdr->opcode = cpu_to_le16(HCI_OP_READ_LOCAL_VERSION);
> + xdata->cmd_hdr->plen = 0;
> + xdata->pkt_len = CMD_HDR_LEN;
> +
> + ret_val = send_hci_cmd(xdata);
> + if (ret_val < 0)
> + goto version_end;
> +
> + ret_val = rcv_hci_evt(xdata);
> + if (ret_val < 0)
> + goto version_end;
> +
> + patch_entry = xdata->dev_entry->patch_entry;
> + read_ver_rsp = (struct hci_rp_read_local_version *)(xdata->rsp_para);
> + RTKBT_DBG("check_fw_version : read_ver_rsp->lmp_subver = 0x%x",
> + le16_to_cpu(read_ver_rsp->lmp_subver));
> + if (patch_entry->lmp_sub != le16_to_cpu(read_ver_rsp->lmp_subver))
> + return 1;
> +
> + ret_val = 0;
> +version_end:
> + return ret_val;
> +}
> +
> +static int get_firmware(struct xchange_data *xdata)
> +{
> + struct dev_data *dev_entry;
> + struct patch_info *patch_entry;
> +
> + dev_entry = xdata->dev_entry;
> + patch_entry = dev_entry->patch_entry;
> + if (patch_entry->fw_len > 0) {
> + xdata->fw_data = kzalloc(patch_entry->fw_len, GFP_KERNEL);
> + if (NULL == xdata->fw_data)
> + return -ENOMEM;
> + memcpy(xdata->fw_data, patch_entry->fw_cache,
> + patch_entry->fw_len);
> + xdata->fw_len = patch_entry->fw_len;
> + } else {
> + xdata->fw_len = load_firmware(dev_entry, &xdata->fw_data);
> + if (xdata->fw_len <= 0)
> + return -1;
> + }
> +
> + return 0;
> +}
> +
> +static int download_data(struct xchange_data *xdata)
> +{
> + struct download_cp *cmd_para;
> + struct download_rp *evt_para;
> + uint8_t *pcur;
> + int pkt_len, frag_num, frag_len;
> + int i, ret_val;
> +
> + cmd_para = (struct download_cp *)xdata->req_para;
> + evt_para = (struct download_rp *)xdata->rsp_para;
> + pcur = xdata->fw_data;
> + pkt_len = CMD_HDR_LEN + sizeof(struct download_cp);
> + frag_num = xdata->fw_len / PATCH_SEG_MAX + 1;
> + frag_len = PATCH_SEG_MAX;
> +
> + for (i = 0; i < frag_num; i++) {
> + cmd_para->index = i;
> + if (i == (frag_num - 1)) {
> + cmd_para->index |= DATA_END;
> + frag_len = xdata->fw_len % PATCH_SEG_MAX;
> + pkt_len -= (PATCH_SEG_MAX - frag_len);
> + }
> + xdata->cmd_hdr->opcode = cpu_to_le16(DOWNLOAD_OPCODE);
> + xdata->cmd_hdr->plen = sizeof(uint8_t) + frag_len;
> + xdata->pkt_len = pkt_len;
> + memcpy(cmd_para->data, pcur, frag_len);
> +
> + ret_val = send_hci_cmd(xdata);
> + if (ret_val < 0)
> + return ret_val;
> +
> + ret_val = rcv_hci_evt(xdata);
> + if (ret_val < 0)
> + return ret_val;
> + if (0 != evt_para->status)
> + return -1;
> +
> + pcur += PATCH_SEG_MAX;
> + }
> +
> + return xdata->fw_len;
> +}
> +
> +static int send_hci_cmd(struct xchange_data *xdata)
> +{
> + int ret_val;
> +
> + ret_val = usb_control_msg(
> + xdata->dev_entry->udev, xdata->pipe_out,
> + 0, USB_TYPE_CLASS, 0, 0,
> + (void *)(xdata->send_pkt),
> + xdata->pkt_len, MSG_TO);
> +
> + return ret_val;
> +}
> +
> +static int rcv_hci_evt(struct xchange_data *xdata)
> +{
> + int ret_len, ret_val;
> + int i; /* Added by Realtek */
> +
> + while (1) {
> +
> + /* **************************** Modifed by Realtek (begin) */
> + for (i = 0; i < 5; i++) {
> + /* Try to send USB interrupt message 5 times. */
> + ret_val = usb_interrupt_msg(
> + xdata->dev_entry->udev, xdata->pipe_in,
> + (void *)(xdata->rcv_pkt), PKT_LEN,
> + &ret_len, MSG_TO);
> + if (ret_val >= 0)
> + break;
> + }
> + /* **************************** Modifed by Realtek (end) */
> +
> + if (ret_val < 0)
> + return ret_val;
> +
> + if (CMD_CMP_EVT == xdata->evt_hdr->evt) {
> + if (xdata->cmd_hdr->opcode == xdata->cmd_cmp->opcode)
> + return ret_len;
> + }
> + }
> +}
>
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