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![Gustavo A. R. Silva](/assets/img/avatar_default.png)
Replace the existing /* fall through */ comments and its variants with the new pseudo-keyword macro fallthrough[1]. Also, remove unnecessary fall-through markings when it is the case. [1] https://www.kernel.org/doc/html/latest/process/deprecated.html?highlight=fallthrough#implicit-switch-case-fall-through Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
267 lines
6 KiB
C
267 lines
6 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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*
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* Broadcom Blutonium firmware driver
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*
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* Copyright (C) 2003 Maxim Krasnyansky <maxk@qualcomm.com>
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* Copyright (C) 2003 Marcel Holtmann <marcel@holtmann.org>
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*/
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#include <linux/module.h>
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#include <linux/atomic.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/types.h>
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#include <linux/errno.h>
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#include <linux/device.h>
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#include <linux/firmware.h>
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#include <linux/usb.h>
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#include <net/bluetooth/bluetooth.h>
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#define VERSION "1.2"
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static const struct usb_device_id bcm203x_table[] = {
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/* Broadcom Blutonium (BCM2033) */
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{ USB_DEVICE(0x0a5c, 0x2033) },
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{ } /* Terminating entry */
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};
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MODULE_DEVICE_TABLE(usb, bcm203x_table);
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#define BCM203X_ERROR 0
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#define BCM203X_RESET 1
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#define BCM203X_LOAD_MINIDRV 2
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#define BCM203X_SELECT_MEMORY 3
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#define BCM203X_CHECK_MEMORY 4
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#define BCM203X_LOAD_FIRMWARE 5
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#define BCM203X_CHECK_FIRMWARE 6
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#define BCM203X_IN_EP 0x81
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#define BCM203X_OUT_EP 0x02
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struct bcm203x_data {
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struct usb_device *udev;
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unsigned long state;
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struct work_struct work;
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atomic_t shutdown;
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struct urb *urb;
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unsigned char *buffer;
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unsigned char *fw_data;
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unsigned int fw_size;
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unsigned int fw_sent;
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};
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static void bcm203x_complete(struct urb *urb)
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{
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struct bcm203x_data *data = urb->context;
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struct usb_device *udev = urb->dev;
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int len;
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BT_DBG("udev %p urb %p", udev, urb);
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if (urb->status) {
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BT_ERR("URB failed with status %d", urb->status);
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data->state = BCM203X_ERROR;
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return;
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}
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switch (data->state) {
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case BCM203X_LOAD_MINIDRV:
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memcpy(data->buffer, "#", 1);
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usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, BCM203X_OUT_EP),
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data->buffer, 1, bcm203x_complete, data);
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data->state = BCM203X_SELECT_MEMORY;
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/* use workqueue to have a small delay */
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schedule_work(&data->work);
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break;
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case BCM203X_SELECT_MEMORY:
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usb_fill_int_urb(urb, udev, usb_rcvintpipe(udev, BCM203X_IN_EP),
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data->buffer, 32, bcm203x_complete, data, 1);
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data->state = BCM203X_CHECK_MEMORY;
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if (usb_submit_urb(data->urb, GFP_ATOMIC) < 0)
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BT_ERR("Can't submit URB");
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break;
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case BCM203X_CHECK_MEMORY:
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if (data->buffer[0] != '#') {
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BT_ERR("Memory select failed");
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data->state = BCM203X_ERROR;
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break;
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}
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data->state = BCM203X_LOAD_FIRMWARE;
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fallthrough;
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case BCM203X_LOAD_FIRMWARE:
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if (data->fw_sent == data->fw_size) {
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usb_fill_int_urb(urb, udev, usb_rcvintpipe(udev, BCM203X_IN_EP),
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data->buffer, 32, bcm203x_complete, data, 1);
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data->state = BCM203X_CHECK_FIRMWARE;
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} else {
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len = min_t(uint, data->fw_size - data->fw_sent, 4096);
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usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, BCM203X_OUT_EP),
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data->fw_data + data->fw_sent, len, bcm203x_complete, data);
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data->fw_sent += len;
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}
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if (usb_submit_urb(data->urb, GFP_ATOMIC) < 0)
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BT_ERR("Can't submit URB");
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break;
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case BCM203X_CHECK_FIRMWARE:
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if (data->buffer[0] != '.') {
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BT_ERR("Firmware loading failed");
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data->state = BCM203X_ERROR;
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break;
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}
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data->state = BCM203X_RESET;
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break;
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}
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}
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static void bcm203x_work(struct work_struct *work)
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{
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struct bcm203x_data *data =
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container_of(work, struct bcm203x_data, work);
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if (atomic_read(&data->shutdown))
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return;
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if (usb_submit_urb(data->urb, GFP_KERNEL) < 0)
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BT_ERR("Can't submit URB");
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}
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static int bcm203x_probe(struct usb_interface *intf, const struct usb_device_id *id)
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{
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const struct firmware *firmware;
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struct usb_device *udev = interface_to_usbdev(intf);
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struct bcm203x_data *data;
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int size;
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BT_DBG("intf %p id %p", intf, id);
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if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
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return -ENODEV;
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data = devm_kzalloc(&intf->dev, sizeof(*data), GFP_KERNEL);
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if (!data)
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return -ENOMEM;
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data->udev = udev;
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data->state = BCM203X_LOAD_MINIDRV;
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data->urb = usb_alloc_urb(0, GFP_KERNEL);
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if (!data->urb)
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return -ENOMEM;
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if (request_firmware(&firmware, "BCM2033-MD.hex", &udev->dev) < 0) {
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BT_ERR("Mini driver request failed");
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usb_free_urb(data->urb);
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return -EIO;
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}
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BT_DBG("minidrv data %p size %zu", firmware->data, firmware->size);
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size = max_t(uint, firmware->size, 4096);
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data->buffer = kmalloc(size, GFP_KERNEL);
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if (!data->buffer) {
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BT_ERR("Can't allocate memory for mini driver");
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release_firmware(firmware);
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usb_free_urb(data->urb);
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return -ENOMEM;
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}
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memcpy(data->buffer, firmware->data, firmware->size);
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usb_fill_bulk_urb(data->urb, udev, usb_sndbulkpipe(udev, BCM203X_OUT_EP),
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data->buffer, firmware->size, bcm203x_complete, data);
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release_firmware(firmware);
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if (request_firmware(&firmware, "BCM2033-FW.bin", &udev->dev) < 0) {
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BT_ERR("Firmware request failed");
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usb_free_urb(data->urb);
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kfree(data->buffer);
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return -EIO;
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}
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BT_DBG("firmware data %p size %zu", firmware->data, firmware->size);
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data->fw_data = kmemdup(firmware->data, firmware->size, GFP_KERNEL);
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if (!data->fw_data) {
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BT_ERR("Can't allocate memory for firmware image");
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release_firmware(firmware);
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usb_free_urb(data->urb);
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kfree(data->buffer);
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return -ENOMEM;
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}
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data->fw_size = firmware->size;
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data->fw_sent = 0;
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release_firmware(firmware);
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INIT_WORK(&data->work, bcm203x_work);
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usb_set_intfdata(intf, data);
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/* use workqueue to have a small delay */
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schedule_work(&data->work);
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return 0;
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}
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static void bcm203x_disconnect(struct usb_interface *intf)
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{
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struct bcm203x_data *data = usb_get_intfdata(intf);
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BT_DBG("intf %p", intf);
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atomic_inc(&data->shutdown);
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cancel_work_sync(&data->work);
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usb_kill_urb(data->urb);
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usb_set_intfdata(intf, NULL);
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usb_free_urb(data->urb);
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kfree(data->fw_data);
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kfree(data->buffer);
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}
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static struct usb_driver bcm203x_driver = {
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.name = "bcm203x",
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.probe = bcm203x_probe,
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.disconnect = bcm203x_disconnect,
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.id_table = bcm203x_table,
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.disable_hub_initiated_lpm = 1,
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};
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module_usb_driver(bcm203x_driver);
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MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
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MODULE_DESCRIPTION("Broadcom Blutonium firmware driver ver " VERSION);
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MODULE_VERSION(VERSION);
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MODULE_LICENSE("GPL");
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MODULE_FIRMWARE("BCM2033-MD.hex");
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MODULE_FIRMWARE("BCM2033-FW.bin");
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