Bluetooth: Add DFU driver for Atheros Bluetooth chipset AR3011

Signed-off-by: Vikram Kandukuri <vikram.kandukuri@atheros.com>
Signed-off-by: Alicke Xu <sxu@atheros.com>
Reviewed-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

3 files changed, 200 insertions, 1 deletions

diff --git a/drivers/bluetooth/Kconfig b/drivers/bluetooth/Kconfig
index 652367aa6546..058fbccf2f52 100644
--- a/drivers/bluetooth/Kconfig
+++ b/drivers/bluetooth/Kconfig
@@ -195,5 +195,16 @@ config BT_MRVL_SDIO
           Say Y here to compile support for Marvell BT-over-SDIO driver
           into the kernel or say M to compile it as module.
 
-endmenu
+config BT_ATH3K
+        tristate "Atheros firmware download driver"
+        depends on BT_HCIBTUSB
+        select FW_LOADER
+        help
+          Bluetooth firmware download driver.
+          This driver loads the firmware into the Atheros Bluetooth
+          chipset.
 
+          Say Y here to compile support for "Atheros firmware download driver"
+          into the kernel or say M to compile it as module (ath3k).
+
+endmenu
diff --git a/drivers/bluetooth/Makefile b/drivers/bluetooth/Makefile
index b3f57d2d4eb0..7e5aed598121 100644
--- a/drivers/bluetooth/Makefile
+++ b/drivers/bluetooth/Makefile
@@ -15,6 +15,7 @@ obj-$(CONFIG_BT_HCIBTUART)	+= btuart_cs.o
 obj-$(CONFIG_BT_HCIBTUSB)       += btusb.o
 obj-$(CONFIG_BT_HCIBTSDIO)      += btsdio.o
 
+obj-$(CONFIG_BT_ATH3K)          += ath3k.o
 obj-$(CONFIG_BT_MRVL)           += btmrvl.o
 obj-$(CONFIG_BT_MRVL_SDIO)      += btmrvl_sdio.o
 
diff --git a/drivers/bluetooth/ath3k.c b/drivers/bluetooth/ath3k.c
new file mode 100644
index 000000000000..add9485ca5b6
--- /dev/null
+++ b/drivers/bluetooth/ath3k.c
@@ -0,0 +1,187 @@
+/*
+ * Copyright (c) 2008-2009 Atheros Communications Inc.
+ *
+ *  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/types.h>
+#include <linux/errno.h>
+#include <linux/device.h>
+#include <linux/firmware.h>
+#include <linux/usb.h>
+#include <net/bluetooth/bluetooth.h>
+
+#define VERSION "1.0"
+
+
+static struct usb_device_id ath3k_table[] = {
+        /* Atheros AR3011 */
+        { USB_DEVICE(0x0CF3, 0x3000) },
+        { }     /* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE(usb, ath3k_table);
+
+#define USB_REQ_DFU_DNLOAD      1
+#define BULK_SIZE               4096
+
+struct ath3k_data {
+        struct usb_device *udev;
+        u8 *fw_data;
+        u32 fw_size;
+        u32 fw_sent;
+};
+
+static int ath3k_load_firmware(struct ath3k_data *data,
+                                unsigned char *firmware,
+                                int count)
+{
+        u8 *send_buf;
+        int err, pipe, len, size, sent = 0;
+
+        BT_DBG("ath3k %p udev %p", data, data->udev);
+
+        pipe = usb_sndctrlpipe(data->udev, 0);
+
+        if ((usb_control_msg(data->udev, pipe,
+                                USB_REQ_DFU_DNLOAD,
+                                USB_TYPE_VENDOR, 0, 0,
+                                firmware, 20, USB_CTRL_SET_TIMEOUT)) < 0) {
+                BT_ERR("Can't change to loading configuration err");
+                return -EBUSY;
+        }
+        sent += 20;
+        count -= 20;
+
+        send_buf = kmalloc(BULK_SIZE, GFP_ATOMIC);
+        if (!send_buf) {
+                BT_ERR("Can't allocate memory chunk for firmware");
+                return -ENOMEM;
+        }
+
+        while (count) {
+                size = min_t(uint, count, BULK_SIZE);
+                pipe = usb_sndbulkpipe(data->udev, 0x02);
+                memcpy(send_buf, firmware + sent, size);
+
+                err = usb_bulk_msg(data->udev, pipe, send_buf, size,
+                                        &len, 3000);
+
+                if (err || (len != size)) {
+                        BT_ERR("Error in firmware loading err = %d,"
+                                "len = %d, size = %d", err, len, size);
+                        goto error;
+                }
+
+                sent  += size;
+                count -= size;
+        }
+
+        kfree(send_buf);
+        return 0;
+
+error:
+        kfree(send_buf);
+        return err;
+}
+
+static int ath3k_probe(struct usb_interface *intf,
+                        const struct usb_device_id *id)
+{
+        const struct firmware *firmware;
+        struct usb_device *udev = interface_to_usbdev(intf);
+        struct ath3k_data *data;
+        int size;
+
+        BT_DBG("intf %p id %p", intf, id);
+
+        if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
+                return -ENODEV;
+
+        data = kzalloc(sizeof(*data), GFP_KERNEL);
+        if (!data)
+                return -ENOMEM;
+
+        data->udev = udev;
+
+        if (request_firmware(&firmware, "ath3k-1.fw", &udev->dev) < 0) {
+                kfree(data);
+                return -EIO;
+        }
+
+        size = max_t(uint, firmware->size, 4096);
+        data->fw_data = kmalloc(size, GFP_KERNEL);
+        if (!data->fw_data) {
+                release_firmware(firmware);
+                kfree(data);
+                return -ENOMEM;
+        }
+
+        memcpy(data->fw_data, firmware->data, firmware->size);
+        data->fw_size = firmware->size;
+        data->fw_sent = 0;
+        release_firmware(firmware);
+
+        usb_set_intfdata(intf, data);
+        if (ath3k_load_firmware(data, data->fw_data, data->fw_size)) {
+                usb_set_intfdata(intf, NULL);
+                return -EIO;
+        }
+
+        return 0;
+}
+
+static void ath3k_disconnect(struct usb_interface *intf)
+{
+        struct ath3k_data *data = usb_get_intfdata(intf);
+
+        BT_DBG("ath3k_disconnect intf %p", intf);
+
+        kfree(data->fw_data);
+        kfree(data);
+}
+
+static struct usb_driver ath3k_driver = {
+        .name           = "ath3k",
+        .probe          = ath3k_probe,
+        .disconnect     = ath3k_disconnect,
+        .id_table       = ath3k_table,
+};
+
+static int __init ath3k_init(void)
+{
+        BT_INFO("Atheros AR30xx firmware driver ver %s", VERSION);
+        return usb_register(&ath3k_driver);
+}
+
+static void __exit ath3k_exit(void)
+{
+        usb_deregister(&ath3k_driver);
+}
+
+module_init(ath3k_init);
+module_exit(ath3k_exit);
+
+MODULE_AUTHOR("Atheros Communications");
+MODULE_DESCRIPTION("Atheros AR30xx firmware driver");
+MODULE_VERSION(VERSION);
+MODULE_LICENSE("GPL");
+MODULE_FIRMWARE("ath3k-1.fw");