Merge tag 'pwm/for-4.1-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry...
[sfrench/cifs-2.6.git] / drivers / bluetooth / btbcm.c
1 /*
2  *
3  *  Bluetooth support for Broadcom devices
4  *
5  *  Copyright (C) 2015  Intel Corporation
6  *
7  *
8  *  This program is free software; you can redistribute it and/or modify
9  *  it under the terms of the GNU General Public License as published by
10  *  the Free Software Foundation; either version 2 of the License, or
11  *  (at your option) any later version.
12  *
13  *  This program is distributed in the hope that it will be useful,
14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16  *  GNU General Public License for more details.
17  *
18  *  You should have received a copy of the GNU General Public License
19  *  along with this program; if not, write to the Free Software
20  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
21  *
22  */
23
24 #include <linux/module.h>
25 #include <linux/firmware.h>
26 #include <asm/unaligned.h>
27
28 #include <net/bluetooth/bluetooth.h>
29 #include <net/bluetooth/hci_core.h>
30
31 #include "btbcm.h"
32
33 #define VERSION "0.1"
34
35 #define BDADDR_BCM20702A0 (&(bdaddr_t) {{0x00, 0xa0, 0x02, 0x70, 0x20, 0x00}})
36
37 int btbcm_check_bdaddr(struct hci_dev *hdev)
38 {
39         struct hci_rp_read_bd_addr *bda;
40         struct sk_buff *skb;
41
42         skb = __hci_cmd_sync(hdev, HCI_OP_READ_BD_ADDR, 0, NULL,
43                              HCI_INIT_TIMEOUT);
44         if (IS_ERR(skb)) {
45                 int err = PTR_ERR(skb);
46                 BT_ERR("%s: BCM: Reading device address failed (%d)",
47                        hdev->name, err);
48                 return err;
49         }
50
51         if (skb->len != sizeof(*bda)) {
52                 BT_ERR("%s: BCM: Device address length mismatch", hdev->name);
53                 kfree_skb(skb);
54                 return -EIO;
55         }
56
57         bda = (struct hci_rp_read_bd_addr *)skb->data;
58         if (bda->status) {
59                 BT_ERR("%s: BCM: Device address result failed (%02x)",
60                        hdev->name, bda->status);
61                 kfree_skb(skb);
62                 return -bt_to_errno(bda->status);
63         }
64
65         /* The address 00:20:70:02:A0:00 indicates a BCM20702A0 controller
66          * with no configured address.
67          */
68         if (!bacmp(&bda->bdaddr, BDADDR_BCM20702A0)) {
69                 BT_INFO("%s: BCM: Using default device address (%pMR)",
70                         hdev->name, &bda->bdaddr);
71                 set_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks);
72         }
73
74         kfree_skb(skb);
75
76         return 0;
77 }
78 EXPORT_SYMBOL_GPL(btbcm_check_bdaddr);
79
80 int btbcm_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr)
81 {
82         struct sk_buff *skb;
83         int err;
84
85         skb = __hci_cmd_sync(hdev, 0xfc01, 6, bdaddr, HCI_INIT_TIMEOUT);
86         if (IS_ERR(skb)) {
87                 err = PTR_ERR(skb);
88                 BT_ERR("%s: BCM: Change address command failed (%d)",
89                        hdev->name, err);
90                 return err;
91         }
92         kfree_skb(skb);
93
94         return 0;
95 }
96 EXPORT_SYMBOL_GPL(btbcm_set_bdaddr);
97
98 int btbcm_patchram(struct hci_dev *hdev, const char *firmware)
99 {
100         const struct hci_command_hdr *cmd;
101         const struct firmware *fw;
102         const u8 *fw_ptr;
103         size_t fw_size;
104         struct sk_buff *skb;
105         u16 opcode;
106         int err;
107
108         err = request_firmware(&fw, firmware, &hdev->dev);
109         if (err < 0) {
110                 BT_INFO("%s: BCM: Patch %s not found", hdev->name, firmware);
111                 return err;
112         }
113
114         /* Start Download */
115         skb = __hci_cmd_sync(hdev, 0xfc2e, 0, NULL, HCI_INIT_TIMEOUT);
116         if (IS_ERR(skb)) {
117                 err = PTR_ERR(skb);
118                 BT_ERR("%s: BCM: Download Minidrv command failed (%d)",
119                        hdev->name, err);
120                 goto done;
121         }
122         kfree_skb(skb);
123
124         /* 50 msec delay after Download Minidrv completes */
125         msleep(50);
126
127         fw_ptr = fw->data;
128         fw_size = fw->size;
129
130         while (fw_size >= sizeof(*cmd)) {
131                 const u8 *cmd_param;
132
133                 cmd = (struct hci_command_hdr *)fw_ptr;
134                 fw_ptr += sizeof(*cmd);
135                 fw_size -= sizeof(*cmd);
136
137                 if (fw_size < cmd->plen) {
138                         BT_ERR("%s: BCM: Patch %s is corrupted", hdev->name,
139                                firmware);
140                         err = -EINVAL;
141                         goto done;
142                 }
143
144                 cmd_param = fw_ptr;
145                 fw_ptr += cmd->plen;
146                 fw_size -= cmd->plen;
147
148                 opcode = le16_to_cpu(cmd->opcode);
149
150                 skb = __hci_cmd_sync(hdev, opcode, cmd->plen, cmd_param,
151                                      HCI_INIT_TIMEOUT);
152                 if (IS_ERR(skb)) {
153                         err = PTR_ERR(skb);
154                         BT_ERR("%s: BCM: Patch command %04x failed (%d)",
155                                hdev->name, opcode, err);
156                         goto done;
157                 }
158                 kfree_skb(skb);
159         }
160
161         /* 250 msec delay after Launch Ram completes */
162         msleep(250);
163
164 done:
165         release_firmware(fw);
166         return err;
167 }
168 EXPORT_SYMBOL(btbcm_patchram);
169
170 static int btbcm_reset(struct hci_dev *hdev)
171 {
172         struct sk_buff *skb;
173
174         skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
175         if (IS_ERR(skb)) {
176                 int err = PTR_ERR(skb);
177                 BT_ERR("%s: BCM: Reset failed (%d)", hdev->name, err);
178                 return err;
179         }
180         kfree_skb(skb);
181
182         return 0;
183 }
184
185 static struct sk_buff *btbcm_read_local_version(struct hci_dev *hdev)
186 {
187         struct sk_buff *skb;
188
189         skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL,
190                              HCI_INIT_TIMEOUT);
191         if (IS_ERR(skb)) {
192                 BT_ERR("%s: BCM: Reading local version info failed (%ld)",
193                        hdev->name, PTR_ERR(skb));
194                 return skb;
195         }
196
197         if (skb->len != sizeof(struct hci_rp_read_local_version)) {
198                 BT_ERR("%s: BCM: Local version length mismatch", hdev->name);
199                 kfree_skb(skb);
200                 return ERR_PTR(-EIO);
201         }
202
203         return skb;
204 }
205
206 static struct sk_buff *btbcm_read_verbose_config(struct hci_dev *hdev)
207 {
208         struct sk_buff *skb;
209
210         skb = __hci_cmd_sync(hdev, 0xfc79, 0, NULL, HCI_INIT_TIMEOUT);
211         if (IS_ERR(skb)) {
212                 BT_ERR("%s: BCM: Read verbose config info failed (%ld)",
213                        hdev->name, PTR_ERR(skb));
214                 return skb;
215         }
216
217         if (skb->len != 7) {
218                 BT_ERR("%s: BCM: Verbose config length mismatch", hdev->name);
219                 kfree_skb(skb);
220                 return ERR_PTR(-EIO);
221         }
222
223         return skb;
224 }
225
226 static struct sk_buff *btbcm_read_usb_product(struct hci_dev *hdev)
227 {
228         struct sk_buff *skb;
229
230         skb = __hci_cmd_sync(hdev, 0xfc5a, 0, NULL, HCI_INIT_TIMEOUT);
231         if (IS_ERR(skb)) {
232                 BT_ERR("%s: BCM: Read USB product info failed (%ld)",
233                        hdev->name, PTR_ERR(skb));
234                 return skb;
235         }
236
237         if (skb->len != 5) {
238                 BT_ERR("%s: BCM: USB product length mismatch", hdev->name);
239                 kfree_skb(skb);
240                 return ERR_PTR(-EIO);
241         }
242
243         return skb;
244 }
245
246 static const struct {
247         u16 subver;
248         const char *name;
249 } bcm_uart_subver_table[] = {
250         { 0x410e, "BCM43341B0"  },      /* 002.001.014 */
251         { }
252 };
253
254 static const struct {
255         u16 subver;
256         const char *name;
257 } bcm_usb_subver_table[] = {
258         { 0x210b, "BCM43142A0"  },      /* 001.001.011 */
259         { 0x2112, "BCM4314A0"   },      /* 001.001.018 */
260         { 0x2118, "BCM20702A0"  },      /* 001.001.024 */
261         { 0x2126, "BCM4335A0"   },      /* 001.001.038 */
262         { 0x220e, "BCM20702A1"  },      /* 001.002.014 */
263         { 0x230f, "BCM4354A2"   },      /* 001.003.015 */
264         { 0x4106, "BCM4335B0"   },      /* 002.001.006 */
265         { 0x410e, "BCM20702B0"  },      /* 002.001.014 */
266         { 0x6109, "BCM4335C0"   },      /* 003.001.009 */
267         { 0x610c, "BCM4354"     },      /* 003.001.012 */
268         { }
269 };
270
271 int btbcm_setup_patchram(struct hci_dev *hdev)
272 {
273         char fw_name[64];
274         u16 subver, rev, pid, vid;
275         const char *hw_name = NULL;
276         struct sk_buff *skb;
277         struct hci_rp_read_local_version *ver;
278         int i, err;
279
280         /* Reset */
281         err = btbcm_reset(hdev);
282         if (err)
283                 return err;
284
285         /* Read Local Version Info */
286         skb = btbcm_read_local_version(hdev);
287         if (IS_ERR(skb))
288                 return PTR_ERR(skb);
289
290         ver = (struct hci_rp_read_local_version *)skb->data;
291         rev = le16_to_cpu(ver->hci_rev);
292         subver = le16_to_cpu(ver->lmp_subver);
293         kfree_skb(skb);
294
295         /* Read Verbose Config Version Info */
296         skb = btbcm_read_verbose_config(hdev);
297         if (IS_ERR(skb))
298                 return PTR_ERR(skb);
299
300         BT_INFO("%s: BCM: chip id %u", hdev->name, skb->data[1]);
301         kfree_skb(skb);
302
303         switch ((rev & 0xf000) >> 12) {
304         case 0:
305                 for (i = 0; bcm_uart_subver_table[i].name; i++) {
306                         if (subver == bcm_uart_subver_table[i].subver) {
307                                 hw_name = bcm_uart_subver_table[i].name;
308                                 break;
309                         }
310                 }
311
312                 snprintf(fw_name, sizeof(fw_name), "brcm/%s.hcd",
313                          hw_name ? : "BCM");
314                 break;
315         case 1:
316         case 2:
317                 /* Read USB Product Info */
318                 skb = btbcm_read_usb_product(hdev);
319                 if (IS_ERR(skb))
320                         return PTR_ERR(skb);
321
322                 vid = get_unaligned_le16(skb->data + 1);
323                 pid = get_unaligned_le16(skb->data + 3);
324                 kfree_skb(skb);
325
326                 for (i = 0; bcm_usb_subver_table[i].name; i++) {
327                         if (subver == bcm_usb_subver_table[i].subver) {
328                                 hw_name = bcm_usb_subver_table[i].name;
329                                 break;
330                         }
331                 }
332
333                 snprintf(fw_name, sizeof(fw_name), "brcm/%s-%4.4x-%4.4x.hcd",
334                          hw_name ? : "BCM", vid, pid);
335                 break;
336         default:
337                 return 0;
338         }
339
340         BT_INFO("%s: %s (%3.3u.%3.3u.%3.3u) build %4.4u", hdev->name,
341                 hw_name ? : "BCM", (subver & 0x7000) >> 13,
342                 (subver & 0x1f00) >> 8, (subver & 0x00ff), rev & 0x0fff);
343
344         err = btbcm_patchram(hdev, fw_name);
345         if (err == -ENOENT)
346                 return 0;
347
348         /* Reset */
349         err = btbcm_reset(hdev);
350         if (err)
351                 return err;
352
353         /* Read Local Version Info */
354         skb = btbcm_read_local_version(hdev);
355         if (IS_ERR(skb))
356                 return PTR_ERR(skb);
357
358         ver = (struct hci_rp_read_local_version *)skb->data;
359         rev = le16_to_cpu(ver->hci_rev);
360         subver = le16_to_cpu(ver->lmp_subver);
361         kfree_skb(skb);
362
363         BT_INFO("%s: %s (%3.3u.%3.3u.%3.3u) build %4.4u", hdev->name,
364                 hw_name ? : "BCM", (subver & 0x7000) >> 13,
365                 (subver & 0x1f00) >> 8, (subver & 0x00ff), rev & 0x0fff);
366
367         btbcm_check_bdaddr(hdev);
368
369         set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
370
371         return 0;
372 }
373 EXPORT_SYMBOL_GPL(btbcm_setup_patchram);
374
375 int btbcm_setup_apple(struct hci_dev *hdev)
376 {
377         struct sk_buff *skb;
378
379         /* Read Verbose Config Version Info */
380         skb = btbcm_read_verbose_config(hdev);
381         if (IS_ERR(skb))
382                 return PTR_ERR(skb);
383
384         BT_INFO("%s: BCM: chip id %u build %4.4u", hdev->name, skb->data[1],
385                 get_unaligned_le16(skb->data + 5));
386         kfree_skb(skb);
387
388         set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
389
390         return 0;
391 }
392 EXPORT_SYMBOL_GPL(btbcm_setup_apple);
393
394 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
395 MODULE_DESCRIPTION("Bluetooth support for Broadcom devices ver " VERSION);
396 MODULE_VERSION(VERSION);
397 MODULE_LICENSE("GPL");