xref: /openbmc/linux/drivers/bluetooth/ath3k.c (revision 4800cd83)
1 /*
2  * Copyright (c) 2008-2009 Atheros Communications Inc.
3  *
4  *  This program is free software; you can redistribute it and/or modify
5  *  it under the terms of the GNU General Public License as published by
6  *  the Free Software Foundation; either version 2 of the License, or
7  *  (at your option) any later version.
8  *
9  *  This program is distributed in the hope that it will be useful,
10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12  *  GNU General Public License for more details.
13  *
14  *  You should have received a copy of the GNU General Public License
15  *  along with this program; if not, write to the Free Software
16  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
17  *
18  */
19 
20 
21 #include <linux/module.h>
22 #include <linux/kernel.h>
23 #include <linux/init.h>
24 #include <linux/slab.h>
25 #include <linux/types.h>
26 #include <linux/errno.h>
27 #include <linux/device.h>
28 #include <linux/firmware.h>
29 #include <linux/usb.h>
30 #include <net/bluetooth/bluetooth.h>
31 
32 #define VERSION "1.0"
33 
34 
35 static struct usb_device_id ath3k_table[] = {
36 	/* Atheros AR3011 */
37 	{ USB_DEVICE(0x0CF3, 0x3000) },
38 
39 	/* Atheros AR3011 with sflash firmware*/
40 	{ USB_DEVICE(0x0CF3, 0x3002) },
41 
42 	/* Atheros AR9285 Malbec with sflash firmware */
43 	{ USB_DEVICE(0x03F0, 0x311D) },
44 
45 	/* Atheros AR5BBU12 with sflash firmware */
46 	{ USB_DEVICE(0x0489, 0xE02C) },
47 	{ }	/* Terminating entry */
48 };
49 
50 MODULE_DEVICE_TABLE(usb, ath3k_table);
51 
52 #define USB_REQ_DFU_DNLOAD	1
53 #define BULK_SIZE		4096
54 
55 static int ath3k_load_firmware(struct usb_device *udev,
56 				const struct firmware *firmware)
57 {
58 	u8 *send_buf;
59 	int err, pipe, len, size, sent = 0;
60 	int count = firmware->size;
61 
62 	BT_DBG("udev %p", udev);
63 
64 	pipe = usb_sndctrlpipe(udev, 0);
65 
66 	send_buf = kmalloc(BULK_SIZE, GFP_ATOMIC);
67 	if (!send_buf) {
68 		BT_ERR("Can't allocate memory chunk for firmware");
69 		return -ENOMEM;
70 	}
71 
72 	memcpy(send_buf, firmware->data, 20);
73 	if ((err = usb_control_msg(udev, pipe,
74 				USB_REQ_DFU_DNLOAD,
75 				USB_TYPE_VENDOR, 0, 0,
76 				send_buf, 20, USB_CTRL_SET_TIMEOUT)) < 0) {
77 		BT_ERR("Can't change to loading configuration err");
78 		goto error;
79 	}
80 	sent += 20;
81 	count -= 20;
82 
83 	while (count) {
84 		size = min_t(uint, count, BULK_SIZE);
85 		pipe = usb_sndbulkpipe(udev, 0x02);
86 		memcpy(send_buf, firmware->data + sent, size);
87 
88 		err = usb_bulk_msg(udev, pipe, send_buf, size,
89 					&len, 3000);
90 
91 		if (err || (len != size)) {
92 			BT_ERR("Error in firmware loading err = %d,"
93 				"len = %d, size = %d", err, len, size);
94 			goto error;
95 		}
96 
97 		sent  += size;
98 		count -= size;
99 	}
100 
101 	kfree(send_buf);
102 	return 0;
103 
104 error:
105 	kfree(send_buf);
106 	return err;
107 }
108 
109 static int ath3k_probe(struct usb_interface *intf,
110 			const struct usb_device_id *id)
111 {
112 	const struct firmware *firmware;
113 	struct usb_device *udev = interface_to_usbdev(intf);
114 
115 	BT_DBG("intf %p id %p", intf, id);
116 
117 	if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
118 		return -ENODEV;
119 
120 	if (request_firmware(&firmware, "ath3k-1.fw", &udev->dev) < 0) {
121 		return -EIO;
122 	}
123 
124 	if (ath3k_load_firmware(udev, firmware)) {
125 		release_firmware(firmware);
126 		return -EIO;
127 	}
128 	release_firmware(firmware);
129 
130 	return 0;
131 }
132 
133 static void ath3k_disconnect(struct usb_interface *intf)
134 {
135 	BT_DBG("ath3k_disconnect intf %p", intf);
136 }
137 
138 static struct usb_driver ath3k_driver = {
139 	.name		= "ath3k",
140 	.probe		= ath3k_probe,
141 	.disconnect	= ath3k_disconnect,
142 	.id_table	= ath3k_table,
143 };
144 
145 static int __init ath3k_init(void)
146 {
147 	BT_INFO("Atheros AR30xx firmware driver ver %s", VERSION);
148 	return usb_register(&ath3k_driver);
149 }
150 
151 static void __exit ath3k_exit(void)
152 {
153 	usb_deregister(&ath3k_driver);
154 }
155 
156 module_init(ath3k_init);
157 module_exit(ath3k_exit);
158 
159 MODULE_AUTHOR("Atheros Communications");
160 MODULE_DESCRIPTION("Atheros AR30xx firmware driver");
161 MODULE_VERSION(VERSION);
162 MODULE_LICENSE("GPL");
163 MODULE_FIRMWARE("ath3k-1.fw");
164