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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 | */ |
9 | ||
1da177e4 LT |
10 | #include <linux/module.h> |
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; | |
a3b4cbfc | 109 | fallthrough; |
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 = |
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; |
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) { |
212 | BT_ERR("Can't allocate memory for firmware image"); | |
73ca66b9 | 213 | release_firmware(firmware); |
1da177e4 LT |
214 | usb_free_urb(data->urb); |
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 | }; |
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"); |
267 | MODULE_FIRMWARE("BCM2033-FW.bin"); |