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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 *
3 * Broadcom Blutonium firmware driver
4 *
5 * Copyright (C) 2003 Maxim Krasnyansky <maxk@qualcomm.com>
6 * Copyright (C) 2003 Marcel Holtmann <marcel@holtmann.org>
7 *
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 *
23 */
24
Linus Torvalds1da177e2005-04-16 15:20:36 -070025#include <linux/module.h>
26
David Herrmannfc501ad2011-10-26 11:13:13 +020027#include <linux/atomic.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070028#include <linux/kernel.h>
29#include <linux/init.h>
30#include <linux/slab.h>
31#include <linux/types.h>
32#include <linux/errno.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070033
34#include <linux/device.h>
35#include <linux/firmware.h>
36
37#include <linux/usb.h>
38
39#include <net/bluetooth/bluetooth.h>
40
Marcel Holtmann943d56b2008-08-07 22:26:55 +020041#define VERSION "1.2"
Linus Torvalds1da177e2005-04-16 15:20:36 -070042
Márton Németh89781112010-01-10 13:39:15 +010043static const struct usb_device_id bcm203x_table[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070044 /* Broadcom Blutonium (BCM2033) */
45 { USB_DEVICE(0x0a5c, 0x2033) },
46
47 { } /* Terminating entry */
48};
49
50MODULE_DEVICE_TABLE(usb, bcm203x_table);
51
52#define BCM203X_ERROR 0
53#define BCM203X_RESET 1
54#define BCM203X_LOAD_MINIDRV 2
55#define BCM203X_SELECT_MEMORY 3
56#define BCM203X_CHECK_MEMORY 4
57#define BCM203X_LOAD_FIRMWARE 5
58#define BCM203X_CHECK_FIRMWARE 6
59
60#define BCM203X_IN_EP 0x81
61#define BCM203X_OUT_EP 0x02
62
63struct bcm203x_data {
64 struct usb_device *udev;
65
66 unsigned long state;
67
Marcel Holtmann3f530692006-10-15 17:31:19 +020068 struct work_struct work;
David Herrmannfc501ad2011-10-26 11:13:13 +020069 atomic_t shutdown;
Linus Torvalds1da177e2005-04-16 15:20:36 -070070
71 struct urb *urb;
72 unsigned char *buffer;
73
74 unsigned char *fw_data;
75 unsigned int fw_size;
76 unsigned int fw_sent;
77};
78
David Howells7d12e782006-10-05 14:55:46 +010079static void bcm203x_complete(struct urb *urb)
Linus Torvalds1da177e2005-04-16 15:20:36 -070080{
81 struct bcm203x_data *data = urb->context;
82 struct usb_device *udev = urb->dev;
83 int len;
84
85 BT_DBG("udev %p urb %p", udev, urb);
86
87 if (urb->status) {
88 BT_ERR("URB failed with status %d", urb->status);
89 data->state = BCM203X_ERROR;
90 return;
91 }
92
93 switch (data->state) {
94 case BCM203X_LOAD_MINIDRV:
95 memcpy(data->buffer, "#", 1);
96
97 usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, BCM203X_OUT_EP),
98 data->buffer, 1, bcm203x_complete, data);
99
100 data->state = BCM203X_SELECT_MEMORY;
101
David Herrmannfc501ad2011-10-26 11:13:13 +0200102 /* use workqueue to have a small delay */
Marcel Holtmann3f530692006-10-15 17:31:19 +0200103 schedule_work(&data->work);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104 break;
105
106 case BCM203X_SELECT_MEMORY:
107 usb_fill_int_urb(urb, udev, usb_rcvintpipe(udev, BCM203X_IN_EP),
108 data->buffer, 32, bcm203x_complete, data, 1);
109
110 data->state = BCM203X_CHECK_MEMORY;
111
112 if (usb_submit_urb(data->urb, GFP_ATOMIC) < 0)
113 BT_ERR("Can't submit URB");
114 break;
115
116 case BCM203X_CHECK_MEMORY:
117 if (data->buffer[0] != '#') {
118 BT_ERR("Memory select failed");
119 data->state = BCM203X_ERROR;
120 break;
121 }
122
123 data->state = BCM203X_LOAD_FIRMWARE;
124
125 case BCM203X_LOAD_FIRMWARE:
126 if (data->fw_sent == data->fw_size) {
127 usb_fill_int_urb(urb, udev, usb_rcvintpipe(udev, BCM203X_IN_EP),
128 data->buffer, 32, bcm203x_complete, data, 1);
129
130 data->state = BCM203X_CHECK_FIRMWARE;
131 } else {
132 len = min_t(uint, data->fw_size - data->fw_sent, 4096);
133
134 usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, BCM203X_OUT_EP),
135 data->fw_data + data->fw_sent, len, bcm203x_complete, data);
136
137 data->fw_sent += len;
138 }
139
140 if (usb_submit_urb(data->urb, GFP_ATOMIC) < 0)
141 BT_ERR("Can't submit URB");
142 break;
143
144 case BCM203X_CHECK_FIRMWARE:
145 if (data->buffer[0] != '.') {
146 BT_ERR("Firmware loading failed");
147 data->state = BCM203X_ERROR;
148 break;
149 }
150
151 data->state = BCM203X_RESET;
152 break;
153 }
154}
155
David Howellsc4028952006-11-22 14:57:56 +0000156static void bcm203x_work(struct work_struct *work)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157{
David Howellsc4028952006-11-22 14:57:56 +0000158 struct bcm203x_data *data =
159 container_of(work, struct bcm203x_data, work);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160
David Herrmannfc501ad2011-10-26 11:13:13 +0200161 if (atomic_read(&data->shutdown))
162 return;
163
David Herrmannb91a4e32011-10-25 21:13:36 +0200164 if (usb_submit_urb(data->urb, GFP_KERNEL) < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165 BT_ERR("Can't submit URB");
166}
167
168static int bcm203x_probe(struct usb_interface *intf, const struct usb_device_id *id)
169{
170 const struct firmware *firmware;
171 struct usb_device *udev = interface_to_usbdev(intf);
172 struct bcm203x_data *data;
173 int size;
174
175 BT_DBG("intf %p id %p", intf, id);
176
Marcel Holtmann943d56b2008-08-07 22:26:55 +0200177 if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178 return -ENODEV;
179
Sachin Kamat9357cc62012-07-27 12:38:31 +0530180 data = devm_kzalloc(&intf->dev, sizeof(*data), GFP_KERNEL);
Syam Sidhardhan17722e22015-12-22 19:30:18 +0530181 if (!data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184 data->udev = udev;
185 data->state = BCM203X_LOAD_MINIDRV;
186
187 data->urb = usb_alloc_urb(0, GFP_KERNEL);
188 if (!data->urb) {
189 BT_ERR("Can't allocate URB");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190 return -ENOMEM;
191 }
192
193 if (request_firmware(&firmware, "BCM2033-MD.hex", &udev->dev) < 0) {
194 BT_ERR("Mini driver request failed");
195 usb_free_urb(data->urb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196 return -EIO;
197 }
198
Marcel Holtmanna418b892008-11-30 12:17:28 +0100199 BT_DBG("minidrv data %p size %zu", firmware->data, firmware->size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200
201 size = max_t(uint, firmware->size, 4096);
202
203 data->buffer = kmalloc(size, GFP_KERNEL);
204 if (!data->buffer) {
205 BT_ERR("Can't allocate memory for mini driver");
206 release_firmware(firmware);
207 usb_free_urb(data->urb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208 return -ENOMEM;
209 }
210
211 memcpy(data->buffer, firmware->data, firmware->size);
212
213 usb_fill_bulk_urb(data->urb, udev, usb_sndbulkpipe(udev, BCM203X_OUT_EP),
214 data->buffer, firmware->size, bcm203x_complete, data);
215
216 release_firmware(firmware);
217
218 if (request_firmware(&firmware, "BCM2033-FW.bin", &udev->dev) < 0) {
219 BT_ERR("Firmware request failed");
220 usb_free_urb(data->urb);
221 kfree(data->buffer);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222 return -EIO;
223 }
224
Marcel Holtmanna418b892008-11-30 12:17:28 +0100225 BT_DBG("firmware data %p size %zu", firmware->data, firmware->size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226
Julia Lawall5ee283c2010-05-15 23:19:15 +0200227 data->fw_data = kmemdup(firmware->data, firmware->size, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228 if (!data->fw_data) {
229 BT_ERR("Can't allocate memory for firmware image");
Magnus Damm73ca66b2006-07-10 04:44:09 -0700230 release_firmware(firmware);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231 usb_free_urb(data->urb);
232 kfree(data->buffer);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233 return -ENOMEM;
234 }
235
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236 data->fw_size = firmware->size;
237 data->fw_sent = 0;
238
239 release_firmware(firmware);
240
David Howellsc4028952006-11-22 14:57:56 +0000241 INIT_WORK(&data->work, bcm203x_work);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242
243 usb_set_intfdata(intf, data);
244
David Herrmannfc501ad2011-10-26 11:13:13 +0200245 /* use workqueue to have a small delay */
Marcel Holtmann3f530692006-10-15 17:31:19 +0200246 schedule_work(&data->work);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247
248 return 0;
249}
250
251static void bcm203x_disconnect(struct usb_interface *intf)
252{
253 struct bcm203x_data *data = usb_get_intfdata(intf);
254
255 BT_DBG("intf %p", intf);
256
David Herrmannfc501ad2011-10-26 11:13:13 +0200257 atomic_inc(&data->shutdown);
258 cancel_work_sync(&data->work);
259
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260 usb_kill_urb(data->urb);
261
262 usb_set_intfdata(intf, NULL);
263
264 usb_free_urb(data->urb);
265 kfree(data->fw_data);
266 kfree(data->buffer);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267}
268
269static struct usb_driver bcm203x_driver = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270 .name = "bcm203x",
271 .probe = bcm203x_probe,
272 .disconnect = bcm203x_disconnect,
273 .id_table = bcm203x_table,
Sarah Sharpe1f12eb2012-04-23 10:08:51 -0700274 .disable_hub_initiated_lpm = 1,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275};
276
Greg Kroah-Hartman93f15082011-11-18 09:47:34 -0800277module_usb_driver(bcm203x_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
280MODULE_DESCRIPTION("Broadcom Blutonium firmware driver ver " VERSION);
281MODULE_VERSION(VERSION);
282MODULE_LICENSE("GPL");
Marcel Holtmann23121192007-02-17 23:59:02 +0100283MODULE_FIRMWARE("BCM2033-MD.hex");
284MODULE_FIRMWARE("BCM2033-FW.bin");