[linux-2.6-block.git] / drivers / bluetooth / bcm203x.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *
 *  Broadcom Blutonium firmware driver
 *
 *  Copyright (C) 2003  Maxim Krasnyansky <maxk@qualcomm.com>
 *  Copyright (C) 2003  Marcel Holtmann <marcel@holtmann.org>
 */

#include <linux/module.h>

#include <linux/atomic.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 "1.2"

static const struct usb_device_id bcm203x_table[] = {
	/* Broadcom Blutonium (BCM2033) */
	{ USB_DEVICE(0x0a5c, 0x2033) },

	{ }	/* Terminating entry */
};

MODULE_DEVICE_TABLE(usb, bcm203x_table);

#define BCM203X_ERROR		0
#define BCM203X_RESET		1
#define BCM203X_LOAD_MINIDRV	2
#define BCM203X_SELECT_MEMORY	3
#define BCM203X_CHECK_MEMORY	4
#define BCM203X_LOAD_FIRMWARE	5
#define BCM203X_CHECK_FIRMWARE	6

#define BCM203X_IN_EP		0x81
#define BCM203X_OUT_EP		0x02

struct bcm203x_data {
	struct usb_device	*udev;

	unsigned long		state;

	struct work_struct	work;
	atomic_t		shutdown;

	struct urb		*urb;
	unsigned char		*buffer;

	unsigned char		*fw_data;
	unsigned int		fw_size;
	unsigned int		fw_sent;
};

static void bcm203x_complete(struct urb *urb)
{
	struct bcm203x_data *data = urb->context;
	struct usb_device *udev = urb->dev;
	int len;

	BT_DBG("udev %p urb %p", udev, urb);

	if (urb->status) {
		BT_ERR("URB failed with status %d", urb->status);
		data->state = BCM203X_ERROR;
		return;
	}

	switch (data->state) {
	case BCM203X_LOAD_MINIDRV:
		memcpy(data->buffer, "#", 1);

		usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, BCM203X_OUT_EP),
				data->buffer, 1, bcm203x_complete, data);

		data->state = BCM203X_SELECT_MEMORY;

		/* use workqueue to have a small delay */
		schedule_work(&data->work);
		break;

	case BCM203X_SELECT_MEMORY:
		usb_fill_int_urb(urb, udev, usb_rcvintpipe(udev, BCM203X_IN_EP),
				data->buffer, 32, bcm203x_complete, data, 1);

		data->state = BCM203X_CHECK_MEMORY;

		if (usb_submit_urb(data->urb, GFP_ATOMIC) < 0)
			BT_ERR("Can't submit URB");
		break;

	case BCM203X_CHECK_MEMORY:
		if (data->buffer[0] != '#') {
			BT_ERR("Memory select failed");
			data->state = BCM203X_ERROR;
			break;
		}

		data->state = BCM203X_LOAD_FIRMWARE;
		/* fall through */
	case BCM203X_LOAD_FIRMWARE:
		if (data->fw_sent == data->fw_size) {
			usb_fill_int_urb(urb, udev, usb_rcvintpipe(udev, BCM203X_IN_EP),
				data->buffer, 32, bcm203x_complete, data, 1);

			data->state = BCM203X_CHECK_FIRMWARE;
		} else {
			len = min_t(uint, data->fw_size - data->fw_sent, 4096);

			usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, BCM203X_OUT_EP),
				data->fw_data + data->fw_sent, len, bcm203x_complete, data);

			data->fw_sent += len;
		}

		if (usb_submit_urb(data->urb, GFP_ATOMIC) < 0)
			BT_ERR("Can't submit URB");
		break;

	case BCM203X_CHECK_FIRMWARE:
		if (data->buffer[0] != '.') {
			BT_ERR("Firmware loading failed");
			data->state = BCM203X_ERROR;
			break;
		}

		data->state = BCM203X_RESET;
		break;
	}
}

static void bcm203x_work(struct work_struct *work)
{
	struct bcm203x_data *data =
		container_of(work, struct bcm203x_data, work);

	if (atomic_read(&data->shutdown))
		return;

	if (usb_submit_urb(data->urb, GFP_KERNEL) < 0)
		BT_ERR("Can't submit URB");
}

static int bcm203x_probe(struct usb_interface *intf, const struct usb_device_id *id)
{
	const struct firmware *firmware;
	struct usb_device *udev = interface_to_usbdev(intf);
	struct bcm203x_data *data;
	int size;

	BT_DBG("intf %p id %p", intf, id);

	if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
		return -ENODEV;

	data = devm_kzalloc(&intf->dev, sizeof(*data), GFP_KERNEL);
	if (!data)
		return -ENOMEM;

	data->udev  = udev;
	data->state = BCM203X_LOAD_MINIDRV;

	data->urb = usb_alloc_urb(0, GFP_KERNEL);
	if (!data->urb)
		return -ENOMEM;

	if (request_firmware(&firmware, "BCM2033-MD.hex", &udev->dev) < 0) {
		BT_ERR("Mini driver request failed");
		usb_free_urb(data->urb);
		return -EIO;
	}

	BT_DBG("minidrv data %p size %zu", firmware->data, firmware->size);

	size = max_t(uint, firmware->size, 4096);

	data->buffer = kmalloc(size, GFP_KERNEL);
	if (!data->buffer) {
		BT_ERR("Can't allocate memory for mini driver");
		release_firmware(firmware);
		usb_free_urb(data->urb);
		return -ENOMEM;
	}

	memcpy(data->buffer, firmware->data, firmware->size);

	usb_fill_bulk_urb(data->urb, udev, usb_sndbulkpipe(udev, BCM203X_OUT_EP),
			data->buffer, firmware->size, bcm203x_complete, data);

	release_firmware(firmware);

	if (request_firmware(&firmware, "BCM2033-FW.bin", &udev->dev) < 0) {
		BT_ERR("Firmware request failed");
		usb_free_urb(data->urb);
		kfree(data->buffer);
		return -EIO;
	}

	BT_DBG("firmware data %p size %zu", firmware->data, firmware->size);

	data->fw_data = kmemdup(firmware->data, firmware->size, GFP_KERNEL);
	if (!data->fw_data) {
		BT_ERR("Can't allocate memory for firmware image");
		release_firmware(firmware);
		usb_free_urb(data->urb);
		kfree(data->buffer);
		return -ENOMEM;
	}

	data->fw_size = firmware->size;
	data->fw_sent = 0;

	release_firmware(firmware);

	INIT_WORK(&data->work, bcm203x_work);

	usb_set_intfdata(intf, data);

	/* use workqueue to have a small delay */
	schedule_work(&data->work);

	return 0;
}

static void bcm203x_disconnect(struct usb_interface *intf)
{
	struct bcm203x_data *data = usb_get_intfdata(intf);

	BT_DBG("intf %p", intf);

	atomic_inc(&data->shutdown);
	cancel_work_sync(&data->work);

	usb_kill_urb(data->urb);

	usb_set_intfdata(intf, NULL);

	usb_free_urb(data->urb);
	kfree(data->fw_data);
	kfree(data->buffer);
}

static struct usb_driver bcm203x_driver = {
	.name		= "bcm203x",
	.probe		= bcm203x_probe,
	.disconnect	= bcm203x_disconnect,
	.id_table	= bcm203x_table,
	.disable_hub_initiated_lpm = 1,
};

module_usb_driver(bcm203x_driver);

MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
MODULE_DESCRIPTION("Broadcom Blutonium firmware driver ver " VERSION);
MODULE_VERSION(VERSION);
MODULE_LICENSE("GPL");
MODULE_FIRMWARE("BCM2033-MD.hex");
MODULE_FIRMWARE("BCM2033-FW.bin");
Commit	Line	Data
1a59d1b8	1	// SPDX-License-Identifier: GPL-2.0-or-later
1da177e4 LT	2	/*
	3	*
	4	* Broadcom Blutonium firmware driver
	5	*
	6	* Copyright (C) 2003 Maxim Krasnyansky <maxk@qualcomm.com>
	7	* Copyright (C) 2003 Marcel Holtmann <marcel@holtmann.org>
1da177e4 LT	8	*/
1da177e4 LT	9
1da177e4 LT	10	#include <linux/module.h>
1da177e4 LT	11
fc501ad7	12	#include <linux/atomic.h>
1da177e4 LT	13	#include <linux/kernel.h>
	14	#include <linux/init.h>
	15	#include <linux/slab.h>
	16	#include <linux/types.h>
	17	#include <linux/errno.h>
1da177e4 LT	18
	19	#include <linux/device.h>
	20	#include <linux/firmware.h>
	21
	22	#include <linux/usb.h>
	23
	24	#include <net/bluetooth/bluetooth.h>
	25
943d56b0	26	#define VERSION "1.2"
1da177e4	27
8978111e	28	static const struct usb_device_id bcm203x_table[] = {
1da177e4 LT	29	/* Broadcom Blutonium (BCM2033) */
	30	{ USB_DEVICE(0x0a5c, 0x2033) },
	31
	32	{ } /* Terminating entry */
	33	};
	34
	35	MODULE_DEVICE_TABLE(usb, bcm203x_table);
	36
	37	#define BCM203X_ERROR 0
	38	#define BCM203X_RESET 1
	39	#define BCM203X_LOAD_MINIDRV 2
	40	#define BCM203X_SELECT_MEMORY 3
	41	#define BCM203X_CHECK_MEMORY 4
	42	#define BCM203X_LOAD_FIRMWARE 5
	43	#define BCM203X_CHECK_FIRMWARE 6
	44
	45	#define BCM203X_IN_EP 0x81
	46	#define BCM203X_OUT_EP 0x02
	47
	48	struct bcm203x_data {
	49	struct usb_device *udev;
	50
	51	unsigned long state;
	52
3f530692	53	struct work_struct work;
fc501ad7	54	atomic_t shutdown;
1da177e4 LT	55
	56	struct urb *urb;
	57	unsigned char *buffer;
	58
	59	unsigned char *fw_data;
	60	unsigned int fw_size;
	61	unsigned int fw_sent;
	62	};
	63
7d12e780	64	static void bcm203x_complete(struct urb *urb)
1da177e4 LT	65	{
	66	struct bcm203x_data *data = urb->context;
	67	struct usb_device *udev = urb->dev;
	68	int len;
	69
	70	BT_DBG("udev %p urb %p", udev, urb);
	71
	72	if (urb->status) {
	73	BT_ERR("URB failed with status %d", urb->status);
	74	data->state = BCM203X_ERROR;
	75	return;
	76	}
	77
	78	switch (data->state) {
	79	case BCM203X_LOAD_MINIDRV:
	80	memcpy(data->buffer, "#", 1);
	81
	82	usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, BCM203X_OUT_EP),
	83	data->buffer, 1, bcm203x_complete, data);
	84
	85	data->state = BCM203X_SELECT_MEMORY;
	86
fc501ad7	87	/* use workqueue to have a small delay */
3f530692	88	schedule_work(&data->work);
1da177e4 LT	89	break;
	90
	91	case BCM203X_SELECT_MEMORY:
	92	usb_fill_int_urb(urb, udev, usb_rcvintpipe(udev, BCM203X_IN_EP),
	93	data->buffer, 32, bcm203x_complete, data, 1);
	94
	95	data->state = BCM203X_CHECK_MEMORY;
	96
	97	if (usb_submit_urb(data->urb, GFP_ATOMIC) < 0)
	98	BT_ERR("Can't submit URB");
	99	break;
	100
	101	case BCM203X_CHECK_MEMORY:
	102	if (data->buffer[0] != '#') {
	103	BT_ERR("Memory select failed");
	104	data->state = BCM203X_ERROR;
	105	break;
	106	}
	107
	108	data->state = BCM203X_LOAD_FIRMWARE;
fac72b24	109	/* fall through */
1da177e4 LT	110	case BCM203X_LOAD_FIRMWARE:
	111	if (data->fw_sent == data->fw_size) {
	112	usb_fill_int_urb(urb, udev, usb_rcvintpipe(udev, BCM203X_IN_EP),
	113	data->buffer, 32, bcm203x_complete, data, 1);
	114
	115	data->state = BCM203X_CHECK_FIRMWARE;
	116	} else {
	117	len = min_t(uint, data->fw_size - data->fw_sent, 4096);
	118
	119	usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, BCM203X_OUT_EP),
	120	data->fw_data + data->fw_sent, len, bcm203x_complete, data);
	121
	122	data->fw_sent += len;
	123	}
	124
	125	if (usb_submit_urb(data->urb, GFP_ATOMIC) < 0)
	126	BT_ERR("Can't submit URB");
	127	break;
	128
	129	case BCM203X_CHECK_FIRMWARE:
	130	if (data->buffer[0] != '.') {
	131	BT_ERR("Firmware loading failed");
	132	data->state = BCM203X_ERROR;
	133	break;
	134	}
	135
	136	data->state = BCM203X_RESET;
	137	break;
	138	}
	139	}
	140
c4028958	141	static void bcm203x_work(struct work_struct *work)
1da177e4	142	{
c4028958 DH	143	struct bcm203x_data *data =
c4028958 DH	144	container_of(work, struct bcm203x_data, work);
1da177e4	145
fc501ad7 DH	146	if (atomic_read(&data->shutdown))
	147	return;
	148
b91a4e3e	149	if (usb_submit_urb(data->urb, GFP_KERNEL) < 0)
1da177e4 LT	150	BT_ERR("Can't submit URB");
	151	}
	152
	153	static int bcm203x_probe(struct usb_interface intf, const struct usb_device_id id)
	154	{
	155	const struct firmware *firmware;
	156	struct usb_device *udev = interface_to_usbdev(intf);
	157	struct bcm203x_data *data;
	158	int size;
	159
	160	BT_DBG("intf %p id %p", intf, id);
	161
943d56b0	162	if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
1da177e4 LT	163	return -ENODEV;
1da177e4 LT	164
9357cc60	165	data = devm_kzalloc(&intf->dev, sizeof(*data), GFP_KERNEL);
17722e24	166	if (!data)
1da177e4	167	return -ENOMEM;
1da177e4	168
1da177e4 LT	169	data->udev = udev;
	170	data->state = BCM203X_LOAD_MINIDRV;
	171
	172	data->urb = usb_alloc_urb(0, GFP_KERNEL);
a2f195a7	173	if (!data->urb)
1da177e4	174	return -ENOMEM;
1da177e4 LT	175
	176	if (request_firmware(&firmware, "BCM2033-MD.hex", &udev->dev) < 0) {
	177	BT_ERR("Mini driver request failed");
	178	usb_free_urb(data->urb);
1da177e4 LT	179	return -EIO;
	180	}
	181
a418b893	182	BT_DBG("minidrv data %p size %zu", firmware->data, firmware->size);
1da177e4 LT	183
	184	size = max_t(uint, firmware->size, 4096);
	185
	186	data->buffer = kmalloc(size, GFP_KERNEL);
	187	if (!data->buffer) {
	188	BT_ERR("Can't allocate memory for mini driver");
	189	release_firmware(firmware);
	190	usb_free_urb(data->urb);
1da177e4 LT	191	return -ENOMEM;
	192	}
	193
	194	memcpy(data->buffer, firmware->data, firmware->size);
	195
	196	usb_fill_bulk_urb(data->urb, udev, usb_sndbulkpipe(udev, BCM203X_OUT_EP),
	197	data->buffer, firmware->size, bcm203x_complete, data);
	198
	199	release_firmware(firmware);
	200
	201	if (request_firmware(&firmware, "BCM2033-FW.bin", &udev->dev) < 0) {
	202	BT_ERR("Firmware request failed");
	203	usb_free_urb(data->urb);
	204	kfree(data->buffer);
1da177e4 LT	205	return -EIO;
	206	}
	207
a418b893	208	BT_DBG("firmware data %p size %zu", firmware->data, firmware->size);
1da177e4	209
5ee283c0	210	data->fw_data = kmemdup(firmware->data, firmware->size, GFP_KERNEL);
1da177e4 LT	211	if (!data->fw_data) {
1da177e4 LT	212	BT_ERR("Can't allocate memory for firmware image");
73ca66b9	213	release_firmware(firmware);
1da177e4 LT	214	usb_free_urb(data->urb);
1da177e4 LT	215	kfree(data->buffer);
1da177e4 LT	216	return -ENOMEM;
	217	}
	218
1da177e4 LT	219	data->fw_size = firmware->size;
	220	data->fw_sent = 0;
	221
	222	release_firmware(firmware);
	223
c4028958	224	INIT_WORK(&data->work, bcm203x_work);
1da177e4 LT	225
	226	usb_set_intfdata(intf, data);
	227
fc501ad7	228	/* use workqueue to have a small delay */
3f530692	229	schedule_work(&data->work);
1da177e4 LT	230
	231	return 0;
	232	}
	233
	234	static void bcm203x_disconnect(struct usb_interface *intf)
	235	{
	236	struct bcm203x_data *data = usb_get_intfdata(intf);
	237
	238	BT_DBG("intf %p", intf);
	239
fc501ad7 DH	240	atomic_inc(&data->shutdown);
	241	cancel_work_sync(&data->work);
	242
1da177e4 LT	243	usb_kill_urb(data->urb);
	244
	245	usb_set_intfdata(intf, NULL);
	246
	247	usb_free_urb(data->urb);
	248	kfree(data->fw_data);
	249	kfree(data->buffer);
1da177e4 LT	250	}
	251
	252	static struct usb_driver bcm203x_driver = {
1da177e4 LT	253	.name = "bcm203x",
	254	.probe = bcm203x_probe,
	255	.disconnect = bcm203x_disconnect,
	256	.id_table = bcm203x_table,
e1f12eb6	257	.disable_hub_initiated_lpm = 1,
1da177e4 LT	258	};
1da177e4 LT	259
93f1508c	260	module_usb_driver(bcm203x_driver);
1da177e4	261
1da177e4 LT	262	MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
	263	MODULE_DESCRIPTION("Broadcom Blutonium firmware driver ver " VERSION);
	264	MODULE_VERSION(VERSION);
	265	MODULE_LICENSE("GPL");
2312119a MH	266	MODULE_FIRMWARE("BCM2033-MD.hex");
2312119a MH	267	MODULE_FIRMWARE("BCM2033-FW.bin");