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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * NXP Bluetooth driver
4 * Copyright 2023 NXP
5 */
6
7#include <linux/module.h>
8#include <linux/kernel.h>
9
10#include <linux/serdev.h>
11#include <linux/of.h>
12#include <linux/skbuff.h>
13#include <asm/unaligned.h>
14#include <linux/firmware.h>
15#include <linux/string.h>
16#include <linux/crc8.h>
17#include <linux/crc32.h>
18#include <linux/string_helpers.h>
19
20#include <net/bluetooth/bluetooth.h>
21#include <net/bluetooth/hci_core.h>
22
23#include "h4_recv.h"
24
25#define MANUFACTURER_NXP 37
26
27#define BTNXPUART_TX_STATE_ACTIVE 1
28#define BTNXPUART_FW_DOWNLOADING 2
29#define BTNXPUART_CHECK_BOOT_SIGNATURE 3
30#define BTNXPUART_SERDEV_OPEN 4
31#define BTNXPUART_IR_IN_PROGRESS 5
32
33/* NXP HW err codes */
34#define BTNXPUART_IR_HW_ERR 0xb0
35
36#define FIRMWARE_W8987 "nxp/uartuart8987_bt.bin"
37#define FIRMWARE_W8997 "nxp/uartuart8997_bt_v4.bin"
38#define FIRMWARE_W9098 "nxp/uartuart9098_bt_v1.bin"
39#define FIRMWARE_IW416 "nxp/uartiw416_bt_v0.bin"
40#define FIRMWARE_IW612 "nxp/uartspi_n61x_v1.bin.se"
41#define FIRMWARE_IW624 "nxp/uartiw624_bt.bin"
42#define FIRMWARE_SECURE_IW624 "nxp/uartiw624_bt.bin.se"
43#define FIRMWARE_AW693 "nxp/uartaw693_bt.bin"
44#define FIRMWARE_SECURE_AW693 "nxp/uartaw693_bt.bin.se"
45#define FIRMWARE_HELPER "nxp/helper_uart_3000000.bin"
46
47#define CHIP_ID_W9098 0x5c03
48#define CHIP_ID_IW416 0x7201
49#define CHIP_ID_IW612 0x7601
50#define CHIP_ID_IW624a 0x8000
51#define CHIP_ID_IW624c 0x8001
52#define CHIP_ID_AW693 0x8200
53
54#define FW_SECURE_MASK 0xc0
55#define FW_OPEN 0x00
56#define FW_AUTH_ILLEGAL 0x40
57#define FW_AUTH_PLAIN 0x80
58#define FW_AUTH_ENC 0xc0
59
60#define HCI_NXP_PRI_BAUDRATE 115200
61#define HCI_NXP_SEC_BAUDRATE 3000000
62
63#define MAX_FW_FILE_NAME_LEN 50
64
65/* Default ps timeout period in milliseconds */
66#define PS_DEFAULT_TIMEOUT_PERIOD_MS 2000
67
68/* wakeup methods */
69#define WAKEUP_METHOD_DTR 0
70#define WAKEUP_METHOD_BREAK 1
71#define WAKEUP_METHOD_EXT_BREAK 2
72#define WAKEUP_METHOD_RTS 3
73#define WAKEUP_METHOD_INVALID 0xff
74
75/* power save mode status */
76#define PS_MODE_DISABLE 0
77#define PS_MODE_ENABLE 1
78
79/* Power Save Commands to ps_work_func */
80#define PS_CMD_EXIT_PS 1
81#define PS_CMD_ENTER_PS 2
82
83/* power save state */
84#define PS_STATE_AWAKE 0
85#define PS_STATE_SLEEP 1
86
87/* Bluetooth vendor command : Sleep mode */
88#define HCI_NXP_AUTO_SLEEP_MODE 0xfc23
89/* Bluetooth vendor command : Wakeup method */
90#define HCI_NXP_WAKEUP_METHOD 0xfc53
91/* Bluetooth vendor command : Set operational baudrate */
92#define HCI_NXP_SET_OPER_SPEED 0xfc09
93/* Bluetooth vendor command: Independent Reset */
94#define HCI_NXP_IND_RESET 0xfcfc
95
96/* Bluetooth Power State : Vendor cmd params */
97#define BT_PS_ENABLE 0x02
98#define BT_PS_DISABLE 0x03
99
100/* Bluetooth Host Wakeup Methods */
101#define BT_HOST_WAKEUP_METHOD_NONE 0x00
102#define BT_HOST_WAKEUP_METHOD_DTR 0x01
103#define BT_HOST_WAKEUP_METHOD_BREAK 0x02
104#define BT_HOST_WAKEUP_METHOD_GPIO 0x03
105
106/* Bluetooth Chip Wakeup Methods */
107#define BT_CTRL_WAKEUP_METHOD_DSR 0x00
108#define BT_CTRL_WAKEUP_METHOD_BREAK 0x01
109#define BT_CTRL_WAKEUP_METHOD_GPIO 0x02
110#define BT_CTRL_WAKEUP_METHOD_EXT_BREAK 0x04
111#define BT_CTRL_WAKEUP_METHOD_RTS 0x05
112
113struct ps_data {
114 u8 target_ps_mode; /* ps mode to be set */
115 u8 cur_psmode; /* current ps_mode */
116 u8 ps_state; /* controller's power save state */
117 u8 ps_cmd;
118 u8 h2c_wakeupmode;
119 u8 cur_h2c_wakeupmode;
120 u8 c2h_wakeupmode;
121 u8 c2h_wakeup_gpio;
122 u8 h2c_wakeup_gpio;
123 bool driver_sent_cmd;
124 u16 h2c_ps_interval;
125 u16 c2h_ps_interval;
126 struct hci_dev *hdev;
127 struct work_struct work;
128 struct timer_list ps_timer;
129};
130
131struct wakeup_cmd_payload {
132 u8 c2h_wakeupmode;
133 u8 c2h_wakeup_gpio;
134 u8 h2c_wakeupmode;
135 u8 h2c_wakeup_gpio;
136} __packed;
137
138struct psmode_cmd_payload {
139 u8 ps_cmd;
140 __le16 c2h_ps_interval;
141} __packed;
142
143struct btnxpuart_data {
144 const char *helper_fw_name;
145 const char *fw_name;
146};
147
148struct btnxpuart_dev {
149 struct hci_dev *hdev;
150 struct serdev_device *serdev;
151
152 struct work_struct tx_work;
153 unsigned long tx_state;
154 struct sk_buff_head txq;
155 struct sk_buff *rx_skb;
156
157 const struct firmware *fw;
158 u8 fw_name[MAX_FW_FILE_NAME_LEN];
159 u32 fw_dnld_v1_offset;
160 u32 fw_v1_sent_bytes;
161 u32 fw_v3_offset_correction;
162 u32 fw_v1_expected_len;
163 u32 boot_reg_offset;
164 wait_queue_head_t fw_dnld_done_wait_q;
165 wait_queue_head_t check_boot_sign_wait_q;
166
167 u32 new_baudrate;
168 u32 current_baudrate;
169 u32 fw_init_baudrate;
170 bool timeout_changed;
171 bool baudrate_changed;
172 bool helper_downloaded;
173
174 struct ps_data psdata;
175 struct btnxpuart_data *nxp_data;
176};
177
178#define NXP_V1_FW_REQ_PKT 0xa5
179#define NXP_V1_CHIP_VER_PKT 0xaa
180#define NXP_V3_FW_REQ_PKT 0xa7
181#define NXP_V3_CHIP_VER_PKT 0xab
182
183#define NXP_ACK_V1 0x5a
184#define NXP_NAK_V1 0xbf
185#define NXP_ACK_V3 0x7a
186#define NXP_NAK_V3 0x7b
187#define NXP_CRC_ERROR_V3 0x7c
188
189#define HDR_LEN 16
190
191#define NXP_RECV_CHIP_VER_V1 \
192 .type = NXP_V1_CHIP_VER_PKT, \
193 .hlen = 4, \
194 .loff = 0, \
195 .lsize = 0, \
196 .maxlen = 4
197
198#define NXP_RECV_FW_REQ_V1 \
199 .type = NXP_V1_FW_REQ_PKT, \
200 .hlen = 4, \
201 .loff = 0, \
202 .lsize = 0, \
203 .maxlen = 4
204
205#define NXP_RECV_CHIP_VER_V3 \
206 .type = NXP_V3_CHIP_VER_PKT, \
207 .hlen = 4, \
208 .loff = 0, \
209 .lsize = 0, \
210 .maxlen = 4
211
212#define NXP_RECV_FW_REQ_V3 \
213 .type = NXP_V3_FW_REQ_PKT, \
214 .hlen = 9, \
215 .loff = 0, \
216 .lsize = 0, \
217 .maxlen = 9
218
219struct v1_data_req {
220 __le16 len;
221 __le16 len_comp;
222} __packed;
223
224struct v1_start_ind {
225 __le16 chip_id;
226 __le16 chip_id_comp;
227} __packed;
228
229struct v3_data_req {
230 __le16 len;
231 __le32 offset;
232 __le16 error;
233 u8 crc;
234} __packed;
235
236struct v3_start_ind {
237 __le16 chip_id;
238 u8 loader_ver;
239 u8 crc;
240} __packed;
241
242/* UART register addresses of BT chip */
243#define CLKDIVADDR 0x7f00008f
244#define UARTDIVADDR 0x7f000090
245#define UARTMCRADDR 0x7f000091
246#define UARTREINITADDR 0x7f000092
247#define UARTICRADDR 0x7f000093
248#define UARTFCRADDR 0x7f000094
249
250#define MCR 0x00000022
251#define INIT 0x00000001
252#define ICR 0x000000c7
253#define FCR 0x000000c7
254
255#define POLYNOMIAL8 0x07
256
257struct uart_reg {
258 __le32 address;
259 __le32 value;
260} __packed;
261
262struct uart_config {
263 struct uart_reg clkdiv;
264 struct uart_reg uartdiv;
265 struct uart_reg mcr;
266 struct uart_reg re_init;
267 struct uart_reg icr;
268 struct uart_reg fcr;
269 __be32 crc;
270} __packed;
271
272struct nxp_bootloader_cmd {
273 __le32 header;
274 __le32 arg;
275 __le32 payload_len;
276 __be32 crc;
277} __packed;
278
279static u8 crc8_table[CRC8_TABLE_SIZE];
280
281/* Default configurations */
282#define DEFAULT_H2C_WAKEUP_MODE WAKEUP_METHOD_BREAK
283#define DEFAULT_PS_MODE PS_MODE_DISABLE
284#define FW_INIT_BAUDRATE HCI_NXP_PRI_BAUDRATE
285
286static struct sk_buff *nxp_drv_send_cmd(struct hci_dev *hdev, u16 opcode,
287 u32 plen,
288 void *param)
289{
290 struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
291 struct ps_data *psdata = &nxpdev->psdata;
292 struct sk_buff *skb;
293
294 /* set flag to prevent nxp_enqueue from parsing values from this command and
295 * calling hci_cmd_sync_queue() again.
296 */
297 psdata->driver_sent_cmd = true;
298 skb = __hci_cmd_sync(hdev, opcode, plen, param, HCI_CMD_TIMEOUT);
299 psdata->driver_sent_cmd = false;
300
301 return skb;
302}
303
304static void btnxpuart_tx_wakeup(struct btnxpuart_dev *nxpdev)
305{
306 if (schedule_work(&nxpdev->tx_work))
307 set_bit(BTNXPUART_TX_STATE_ACTIVE, &nxpdev->tx_state);
308}
309
310/* NXP Power Save Feature */
311static void ps_start_timer(struct btnxpuart_dev *nxpdev)
312{
313 struct ps_data *psdata = &nxpdev->psdata;
314
315 if (!psdata)
316 return;
317
318 if (psdata->cur_psmode == PS_MODE_ENABLE)
319 mod_timer(&psdata->ps_timer, jiffies + msecs_to_jiffies(psdata->h2c_ps_interval));
320}
321
322static void ps_cancel_timer(struct btnxpuart_dev *nxpdev)
323{
324 struct ps_data *psdata = &nxpdev->psdata;
325
326 flush_work(&psdata->work);
327 del_timer_sync(&psdata->ps_timer);
328}
329
330static void ps_control(struct hci_dev *hdev, u8 ps_state)
331{
332 struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
333 struct ps_data *psdata = &nxpdev->psdata;
334 int status;
335
336 if (psdata->ps_state == ps_state ||
337 !test_bit(BTNXPUART_SERDEV_OPEN, &nxpdev->tx_state))
338 return;
339
340 switch (psdata->cur_h2c_wakeupmode) {
341 case WAKEUP_METHOD_DTR:
342 if (ps_state == PS_STATE_AWAKE)
343 status = serdev_device_set_tiocm(nxpdev->serdev, TIOCM_DTR, 0);
344 else
345 status = serdev_device_set_tiocm(nxpdev->serdev, 0, TIOCM_DTR);
346 break;
347 case WAKEUP_METHOD_BREAK:
348 default:
349 if (ps_state == PS_STATE_AWAKE)
350 status = serdev_device_break_ctl(nxpdev->serdev, 0);
351 else
352 status = serdev_device_break_ctl(nxpdev->serdev, -1);
353 bt_dev_dbg(hdev, "Set UART break: %s, status=%d",
354 str_on_off(ps_state == PS_STATE_SLEEP), status);
355 break;
356 }
357 if (!status)
358 psdata->ps_state = ps_state;
359 if (ps_state == PS_STATE_AWAKE)
360 btnxpuart_tx_wakeup(nxpdev);
361}
362
363static void ps_work_func(struct work_struct *work)
364{
365 struct ps_data *data = container_of(work, struct ps_data, work);
366
367 if (data->ps_cmd == PS_CMD_ENTER_PS && data->cur_psmode == PS_MODE_ENABLE)
368 ps_control(data->hdev, PS_STATE_SLEEP);
369 else if (data->ps_cmd == PS_CMD_EXIT_PS)
370 ps_control(data->hdev, PS_STATE_AWAKE);
371}
372
373static void ps_timeout_func(struct timer_list *t)
374{
375 struct ps_data *data = from_timer(data, t, ps_timer);
376 struct hci_dev *hdev = data->hdev;
377 struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
378
379 if (test_bit(BTNXPUART_TX_STATE_ACTIVE, &nxpdev->tx_state)) {
380 ps_start_timer(nxpdev);
381 } else {
382 data->ps_cmd = PS_CMD_ENTER_PS;
383 schedule_work(&data->work);
384 }
385}
386
387static void ps_setup(struct hci_dev *hdev)
388{
389 struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
390 struct ps_data *psdata = &nxpdev->psdata;
391
392 psdata->hdev = hdev;
393 INIT_WORK(&psdata->work, ps_work_func);
394 timer_setup(&psdata->ps_timer, ps_timeout_func, 0);
395}
396
397static void ps_wakeup(struct btnxpuart_dev *nxpdev)
398{
399 struct ps_data *psdata = &nxpdev->psdata;
400
401 if (psdata->ps_state != PS_STATE_AWAKE) {
402 psdata->ps_cmd = PS_CMD_EXIT_PS;
403 schedule_work(&psdata->work);
404 }
405}
406
407static int send_ps_cmd(struct hci_dev *hdev, void *data)
408{
409 struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
410 struct ps_data *psdata = &nxpdev->psdata;
411 struct psmode_cmd_payload pcmd;
412 struct sk_buff *skb;
413 u8 *status;
414
415 if (psdata->target_ps_mode == PS_MODE_ENABLE)
416 pcmd.ps_cmd = BT_PS_ENABLE;
417 else
418 pcmd.ps_cmd = BT_PS_DISABLE;
419 pcmd.c2h_ps_interval = __cpu_to_le16(psdata->c2h_ps_interval);
420
421 skb = nxp_drv_send_cmd(hdev, HCI_NXP_AUTO_SLEEP_MODE, sizeof(pcmd), &pcmd);
422 if (IS_ERR(skb)) {
423 bt_dev_err(hdev, "Setting Power Save mode failed (%ld)", PTR_ERR(skb));
424 return PTR_ERR(skb);
425 }
426
427 status = skb_pull_data(skb, 1);
428 if (status) {
429 if (!*status)
430 psdata->cur_psmode = psdata->target_ps_mode;
431 else
432 psdata->target_ps_mode = psdata->cur_psmode;
433 if (psdata->cur_psmode == PS_MODE_ENABLE)
434 ps_start_timer(nxpdev);
435 else
436 ps_wakeup(nxpdev);
437 bt_dev_dbg(hdev, "Power Save mode response: status=%d, ps_mode=%d",
438 *status, psdata->cur_psmode);
439 }
440 kfree_skb(skb);
441
442 return 0;
443}
444
445static int send_wakeup_method_cmd(struct hci_dev *hdev, void *data)
446{
447 struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
448 struct ps_data *psdata = &nxpdev->psdata;
449 struct wakeup_cmd_payload pcmd;
450 struct sk_buff *skb;
451 u8 *status;
452
453 pcmd.c2h_wakeupmode = psdata->c2h_wakeupmode;
454 pcmd.c2h_wakeup_gpio = psdata->c2h_wakeup_gpio;
455 switch (psdata->h2c_wakeupmode) {
456 case WAKEUP_METHOD_DTR:
457 pcmd.h2c_wakeupmode = BT_CTRL_WAKEUP_METHOD_DSR;
458 break;
459 case WAKEUP_METHOD_BREAK:
460 default:
461 pcmd.h2c_wakeupmode = BT_CTRL_WAKEUP_METHOD_BREAK;
462 break;
463 }
464 pcmd.h2c_wakeup_gpio = 0xff;
465
466 skb = nxp_drv_send_cmd(hdev, HCI_NXP_WAKEUP_METHOD, sizeof(pcmd), &pcmd);
467 if (IS_ERR(skb)) {
468 bt_dev_err(hdev, "Setting wake-up method failed (%ld)", PTR_ERR(skb));
469 return PTR_ERR(skb);
470 }
471
472 status = skb_pull_data(skb, 1);
473 if (status) {
474 if (*status == 0)
475 psdata->cur_h2c_wakeupmode = psdata->h2c_wakeupmode;
476 else
477 psdata->h2c_wakeupmode = psdata->cur_h2c_wakeupmode;
478 bt_dev_dbg(hdev, "Set Wakeup Method response: status=%d, h2c_wakeupmode=%d",
479 *status, psdata->cur_h2c_wakeupmode);
480 }
481 kfree_skb(skb);
482
483 return 0;
484}
485
486static void ps_init(struct hci_dev *hdev)
487{
488 struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
489 struct ps_data *psdata = &nxpdev->psdata;
490
491 serdev_device_set_tiocm(nxpdev->serdev, 0, TIOCM_RTS);
492 usleep_range(5000, 10000);
493 serdev_device_set_tiocm(nxpdev->serdev, TIOCM_RTS, 0);
494 usleep_range(5000, 10000);
495
496 psdata->ps_state = PS_STATE_AWAKE;
497 psdata->c2h_wakeupmode = BT_HOST_WAKEUP_METHOD_NONE;
498 psdata->c2h_wakeup_gpio = 0xff;
499
500 psdata->cur_h2c_wakeupmode = WAKEUP_METHOD_INVALID;
501 psdata->h2c_ps_interval = PS_DEFAULT_TIMEOUT_PERIOD_MS;
502 switch (DEFAULT_H2C_WAKEUP_MODE) {
503 case WAKEUP_METHOD_DTR:
504 psdata->h2c_wakeupmode = WAKEUP_METHOD_DTR;
505 serdev_device_set_tiocm(nxpdev->serdev, 0, TIOCM_DTR);
506 serdev_device_set_tiocm(nxpdev->serdev, TIOCM_DTR, 0);
507 break;
508 case WAKEUP_METHOD_BREAK:
509 default:
510 psdata->h2c_wakeupmode = WAKEUP_METHOD_BREAK;
511 serdev_device_break_ctl(nxpdev->serdev, -1);
512 usleep_range(5000, 10000);
513 serdev_device_break_ctl(nxpdev->serdev, 0);
514 usleep_range(5000, 10000);
515 break;
516 }
517
518 psdata->cur_psmode = PS_MODE_DISABLE;
519 psdata->target_ps_mode = DEFAULT_PS_MODE;
520
521 if (psdata->cur_h2c_wakeupmode != psdata->h2c_wakeupmode)
522 hci_cmd_sync_queue(hdev, send_wakeup_method_cmd, NULL, NULL);
523 if (psdata->cur_psmode != psdata->target_ps_mode)
524 hci_cmd_sync_queue(hdev, send_ps_cmd, NULL, NULL);
525}
526
527/* NXP Firmware Download Feature */
528static int nxp_download_firmware(struct hci_dev *hdev)
529{
530 struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
531 int err = 0;
532
533 nxpdev->fw_dnld_v1_offset = 0;
534 nxpdev->fw_v1_sent_bytes = 0;
535 nxpdev->fw_v1_expected_len = HDR_LEN;
536 nxpdev->boot_reg_offset = 0;
537 nxpdev->fw_v3_offset_correction = 0;
538 nxpdev->baudrate_changed = false;
539 nxpdev->timeout_changed = false;
540 nxpdev->helper_downloaded = false;
541
542 serdev_device_set_baudrate(nxpdev->serdev, HCI_NXP_PRI_BAUDRATE);
543 serdev_device_set_flow_control(nxpdev->serdev, false);
544 nxpdev->current_baudrate = HCI_NXP_PRI_BAUDRATE;
545
546 /* Wait till FW is downloaded */
547 err = wait_event_interruptible_timeout(nxpdev->fw_dnld_done_wait_q,
548 !test_bit(BTNXPUART_FW_DOWNLOADING,
549 &nxpdev->tx_state),
550 msecs_to_jiffies(60000));
551 if (err == 0) {
552 bt_dev_err(hdev, "FW Download Timeout.");
553 return -ETIMEDOUT;
554 }
555
556 serdev_device_set_flow_control(nxpdev->serdev, true);
557 release_firmware(nxpdev->fw);
558 memset(nxpdev->fw_name, 0, sizeof(nxpdev->fw_name));
559
560 /* Allow the downloaded FW to initialize */
561 msleep(1200);
562
563 return 0;
564}
565
566static void nxp_send_ack(u8 ack, struct hci_dev *hdev)
567{
568 struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
569 u8 ack_nak[2];
570 int len = 1;
571
572 ack_nak[0] = ack;
573 if (ack == NXP_ACK_V3) {
574 ack_nak[1] = crc8(crc8_table, ack_nak, 1, 0xff);
575 len = 2;
576 }
577 serdev_device_write_buf(nxpdev->serdev, ack_nak, len);
578}
579
580static bool nxp_fw_change_baudrate(struct hci_dev *hdev, u16 req_len)
581{
582 struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
583 struct nxp_bootloader_cmd nxp_cmd5;
584 struct uart_config uart_config;
585 u32 clkdivaddr = CLKDIVADDR - nxpdev->boot_reg_offset;
586 u32 uartdivaddr = UARTDIVADDR - nxpdev->boot_reg_offset;
587 u32 uartmcraddr = UARTMCRADDR - nxpdev->boot_reg_offset;
588 u32 uartreinitaddr = UARTREINITADDR - nxpdev->boot_reg_offset;
589 u32 uarticraddr = UARTICRADDR - nxpdev->boot_reg_offset;
590 u32 uartfcraddr = UARTFCRADDR - nxpdev->boot_reg_offset;
591
592 if (req_len == sizeof(nxp_cmd5)) {
593 nxp_cmd5.header = __cpu_to_le32(5);
594 nxp_cmd5.arg = 0;
595 nxp_cmd5.payload_len = __cpu_to_le32(sizeof(uart_config));
596 /* FW expects swapped CRC bytes */
597 nxp_cmd5.crc = __cpu_to_be32(crc32_be(0UL, (char *)&nxp_cmd5,
598 sizeof(nxp_cmd5) - 4));
599
600 serdev_device_write_buf(nxpdev->serdev, (u8 *)&nxp_cmd5, sizeof(nxp_cmd5));
601 nxpdev->fw_v3_offset_correction += req_len;
602 } else if (req_len == sizeof(uart_config)) {
603 uart_config.clkdiv.address = __cpu_to_le32(clkdivaddr);
604 uart_config.clkdiv.value = __cpu_to_le32(0x00c00000);
605 uart_config.uartdiv.address = __cpu_to_le32(uartdivaddr);
606 uart_config.uartdiv.value = __cpu_to_le32(1);
607 uart_config.mcr.address = __cpu_to_le32(uartmcraddr);
608 uart_config.mcr.value = __cpu_to_le32(MCR);
609 uart_config.re_init.address = __cpu_to_le32(uartreinitaddr);
610 uart_config.re_init.value = __cpu_to_le32(INIT);
611 uart_config.icr.address = __cpu_to_le32(uarticraddr);
612 uart_config.icr.value = __cpu_to_le32(ICR);
613 uart_config.fcr.address = __cpu_to_le32(uartfcraddr);
614 uart_config.fcr.value = __cpu_to_le32(FCR);
615 /* FW expects swapped CRC bytes */
616 uart_config.crc = __cpu_to_be32(crc32_be(0UL, (char *)&uart_config,
617 sizeof(uart_config) - 4));
618
619 serdev_device_write_buf(nxpdev->serdev, (u8 *)&uart_config, sizeof(uart_config));
620 serdev_device_wait_until_sent(nxpdev->serdev, 0);
621 nxpdev->fw_v3_offset_correction += req_len;
622 return true;
623 }
624 return false;
625}
626
627static bool nxp_fw_change_timeout(struct hci_dev *hdev, u16 req_len)
628{
629 struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
630 struct nxp_bootloader_cmd nxp_cmd7;
631
632 if (req_len != sizeof(nxp_cmd7))
633 return false;
634
635 nxp_cmd7.header = __cpu_to_le32(7);
636 nxp_cmd7.arg = __cpu_to_le32(0x70);
637 nxp_cmd7.payload_len = 0;
638 /* FW expects swapped CRC bytes */
639 nxp_cmd7.crc = __cpu_to_be32(crc32_be(0UL, (char *)&nxp_cmd7,
640 sizeof(nxp_cmd7) - 4));
641 serdev_device_write_buf(nxpdev->serdev, (u8 *)&nxp_cmd7, sizeof(nxp_cmd7));
642 serdev_device_wait_until_sent(nxpdev->serdev, 0);
643 nxpdev->fw_v3_offset_correction += req_len;
644 return true;
645}
646
647static u32 nxp_get_data_len(const u8 *buf)
648{
649 struct nxp_bootloader_cmd *hdr = (struct nxp_bootloader_cmd *)buf;
650
651 return __le32_to_cpu(hdr->payload_len);
652}
653
654static bool is_fw_downloading(struct btnxpuart_dev *nxpdev)
655{
656 return test_bit(BTNXPUART_FW_DOWNLOADING, &nxpdev->tx_state);
657}
658
659static bool process_boot_signature(struct btnxpuart_dev *nxpdev)
660{
661 if (test_bit(BTNXPUART_CHECK_BOOT_SIGNATURE, &nxpdev->tx_state)) {
662 clear_bit(BTNXPUART_CHECK_BOOT_SIGNATURE, &nxpdev->tx_state);
663 wake_up_interruptible(&nxpdev->check_boot_sign_wait_q);
664 return false;
665 }
666 return is_fw_downloading(nxpdev);
667}
668
669static int nxp_request_firmware(struct hci_dev *hdev, const char *fw_name)
670{
671 struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
672 int err = 0;
673
674 if (!fw_name)
675 return -ENOENT;
676
677 if (!strlen(nxpdev->fw_name)) {
678 snprintf(nxpdev->fw_name, MAX_FW_FILE_NAME_LEN, "%s", fw_name);
679
680 bt_dev_dbg(hdev, "Request Firmware: %s", nxpdev->fw_name);
681 err = request_firmware(&nxpdev->fw, nxpdev->fw_name, &hdev->dev);
682 if (err < 0) {
683 bt_dev_err(hdev, "Firmware file %s not found", nxpdev->fw_name);
684 clear_bit(BTNXPUART_FW_DOWNLOADING, &nxpdev->tx_state);
685 }
686 }
687 return err;
688}
689
690/* for legacy chipsets with V1 bootloader */
691static int nxp_recv_chip_ver_v1(struct hci_dev *hdev, struct sk_buff *skb)
692{
693 struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
694 struct v1_start_ind *req;
695 __u16 chip_id;
696
697 req = skb_pull_data(skb, sizeof(*req));
698 if (!req)
699 goto free_skb;
700
701 chip_id = le16_to_cpu(req->chip_id ^ req->chip_id_comp);
702 if (chip_id == 0xffff && nxpdev->fw_dnld_v1_offset) {
703 nxpdev->fw_dnld_v1_offset = 0;
704 nxpdev->fw_v1_sent_bytes = 0;
705 nxpdev->fw_v1_expected_len = HDR_LEN;
706 release_firmware(nxpdev->fw);
707 memset(nxpdev->fw_name, 0, sizeof(nxpdev->fw_name));
708 nxp_send_ack(NXP_ACK_V1, hdev);
709 }
710
711free_skb:
712 kfree_skb(skb);
713 return 0;
714}
715
716static int nxp_recv_fw_req_v1(struct hci_dev *hdev, struct sk_buff *skb)
717{
718 struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
719 struct btnxpuart_data *nxp_data = nxpdev->nxp_data;
720 struct v1_data_req *req;
721 __u16 len;
722
723 if (!process_boot_signature(nxpdev))
724 goto free_skb;
725
726 req = skb_pull_data(skb, sizeof(*req));
727 if (!req)
728 goto free_skb;
729
730 len = __le16_to_cpu(req->len ^ req->len_comp);
731 if (len != 0xffff) {
732 bt_dev_dbg(hdev, "ERR: Send NAK");
733 nxp_send_ack(NXP_NAK_V1, hdev);
734 goto free_skb;
735 }
736 nxp_send_ack(NXP_ACK_V1, hdev);
737
738 len = __le16_to_cpu(req->len);
739
740 if (!nxp_data->helper_fw_name) {
741 if (!nxpdev->timeout_changed) {
742 nxpdev->timeout_changed = nxp_fw_change_timeout(hdev,
743 len);
744 goto free_skb;
745 }
746 if (!nxpdev->baudrate_changed) {
747 nxpdev->baudrate_changed = nxp_fw_change_baudrate(hdev,
748 len);
749 if (nxpdev->baudrate_changed) {
750 serdev_device_set_baudrate(nxpdev->serdev,
751 HCI_NXP_SEC_BAUDRATE);
752 serdev_device_set_flow_control(nxpdev->serdev, true);
753 nxpdev->current_baudrate = HCI_NXP_SEC_BAUDRATE;
754 }
755 goto free_skb;
756 }
757 }
758
759 if (!nxp_data->helper_fw_name || nxpdev->helper_downloaded) {
760 if (nxp_request_firmware(hdev, nxp_data->fw_name))
761 goto free_skb;
762 } else if (nxp_data->helper_fw_name && !nxpdev->helper_downloaded) {
763 if (nxp_request_firmware(hdev, nxp_data->helper_fw_name))
764 goto free_skb;
765 }
766
767 if (!len) {
768 bt_dev_dbg(hdev, "FW Downloaded Successfully: %zu bytes",
769 nxpdev->fw->size);
770 if (nxp_data->helper_fw_name && !nxpdev->helper_downloaded) {
771 nxpdev->helper_downloaded = true;
772 serdev_device_wait_until_sent(nxpdev->serdev, 0);
773 serdev_device_set_baudrate(nxpdev->serdev,
774 HCI_NXP_SEC_BAUDRATE);
775 serdev_device_set_flow_control(nxpdev->serdev, true);
776 } else {
777 clear_bit(BTNXPUART_FW_DOWNLOADING, &nxpdev->tx_state);
778 wake_up_interruptible(&nxpdev->fw_dnld_done_wait_q);
779 }
780 goto free_skb;
781 }
782 if (len & 0x01) {
783 /* The CRC did not match at the other end.
784 * Simply send the same bytes again.
785 */
786 len = nxpdev->fw_v1_sent_bytes;
787 bt_dev_dbg(hdev, "CRC error. Resend %d bytes of FW.", len);
788 } else {
789 nxpdev->fw_dnld_v1_offset += nxpdev->fw_v1_sent_bytes;
790
791 /* The FW bin file is made up of many blocks of
792 * 16 byte header and payload data chunks. If the
793 * FW has requested a header, read the payload length
794 * info from the header, before sending the header.
795 * In the next iteration, the FW should request the
796 * payload data chunk, which should be equal to the
797 * payload length read from header. If there is a
798 * mismatch, clearly the driver and FW are out of sync,
799 * and we need to re-send the previous header again.
800 */
801 if (len == nxpdev->fw_v1_expected_len) {
802 if (len == HDR_LEN)
803 nxpdev->fw_v1_expected_len = nxp_get_data_len(nxpdev->fw->data +
804 nxpdev->fw_dnld_v1_offset);
805 else
806 nxpdev->fw_v1_expected_len = HDR_LEN;
807 } else if (len == HDR_LEN) {
808 /* FW download out of sync. Send previous chunk again */
809 nxpdev->fw_dnld_v1_offset -= nxpdev->fw_v1_sent_bytes;
810 nxpdev->fw_v1_expected_len = HDR_LEN;
811 }
812 }
813
814 if (nxpdev->fw_dnld_v1_offset + len <= nxpdev->fw->size)
815 serdev_device_write_buf(nxpdev->serdev, nxpdev->fw->data +
816 nxpdev->fw_dnld_v1_offset, len);
817 nxpdev->fw_v1_sent_bytes = len;
818
819free_skb:
820 kfree_skb(skb);
821 return 0;
822}
823
824static char *nxp_get_fw_name_from_chipid(struct hci_dev *hdev, u16 chipid,
825 u8 loader_ver)
826{
827 struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
828 char *fw_name = NULL;
829
830 switch (chipid) {
831 case CHIP_ID_W9098:
832 fw_name = FIRMWARE_W9098;
833 break;
834 case CHIP_ID_IW416:
835 fw_name = FIRMWARE_IW416;
836 break;
837 case CHIP_ID_IW612:
838 fw_name = FIRMWARE_IW612;
839 break;
840 case CHIP_ID_IW624a:
841 case CHIP_ID_IW624c:
842 nxpdev->boot_reg_offset = 1;
843 if ((loader_ver & FW_SECURE_MASK) == FW_OPEN)
844 fw_name = FIRMWARE_IW624;
845 else if ((loader_ver & FW_SECURE_MASK) != FW_AUTH_ILLEGAL)
846 fw_name = FIRMWARE_SECURE_IW624;
847 else
848 bt_dev_err(hdev, "Illegal loader version %02x", loader_ver);
849 break;
850 case CHIP_ID_AW693:
851 if ((loader_ver & FW_SECURE_MASK) == FW_OPEN)
852 fw_name = FIRMWARE_AW693;
853 else if ((loader_ver & FW_SECURE_MASK) != FW_AUTH_ILLEGAL)
854 fw_name = FIRMWARE_SECURE_AW693;
855 else
856 bt_dev_err(hdev, "Illegal loader version %02x", loader_ver);
857 break;
858 default:
859 bt_dev_err(hdev, "Unknown chip signature %04x", chipid);
860 break;
861 }
862 return fw_name;
863}
864
865static int nxp_recv_chip_ver_v3(struct hci_dev *hdev, struct sk_buff *skb)
866{
867 struct v3_start_ind *req = skb_pull_data(skb, sizeof(*req));
868 struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
869 u16 chip_id;
870 u8 loader_ver;
871
872 if (!process_boot_signature(nxpdev))
873 goto free_skb;
874
875 chip_id = le16_to_cpu(req->chip_id);
876 loader_ver = req->loader_ver;
877 if (!nxp_request_firmware(hdev, nxp_get_fw_name_from_chipid(hdev,
878 chip_id, loader_ver)))
879 nxp_send_ack(NXP_ACK_V3, hdev);
880
881free_skb:
882 kfree_skb(skb);
883 return 0;
884}
885
886static int nxp_recv_fw_req_v3(struct hci_dev *hdev, struct sk_buff *skb)
887{
888 struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
889 struct v3_data_req *req;
890 __u16 len;
891 __u32 offset;
892
893 if (!process_boot_signature(nxpdev))
894 goto free_skb;
895
896 req = skb_pull_data(skb, sizeof(*req));
897 if (!req || !nxpdev->fw)
898 goto free_skb;
899
900 nxp_send_ack(NXP_ACK_V3, hdev);
901
902 len = __le16_to_cpu(req->len);
903
904 if (!nxpdev->timeout_changed) {
905 nxpdev->timeout_changed = nxp_fw_change_timeout(hdev, len);
906 goto free_skb;
907 }
908
909 if (!nxpdev->baudrate_changed) {
910 nxpdev->baudrate_changed = nxp_fw_change_baudrate(hdev, len);
911 if (nxpdev->baudrate_changed) {
912 serdev_device_set_baudrate(nxpdev->serdev,
913 HCI_NXP_SEC_BAUDRATE);
914 serdev_device_set_flow_control(nxpdev->serdev, true);
915 nxpdev->current_baudrate = HCI_NXP_SEC_BAUDRATE;
916 }
917 goto free_skb;
918 }
919
920 if (req->len == 0) {
921 bt_dev_dbg(hdev, "FW Downloaded Successfully: %zu bytes",
922 nxpdev->fw->size);
923 clear_bit(BTNXPUART_FW_DOWNLOADING, &nxpdev->tx_state);
924 wake_up_interruptible(&nxpdev->fw_dnld_done_wait_q);
925 goto free_skb;
926 }
927 if (req->error)
928 bt_dev_dbg(hdev, "FW Download received err 0x%02x from chip",
929 req->error);
930
931 offset = __le32_to_cpu(req->offset);
932 if (offset < nxpdev->fw_v3_offset_correction) {
933 /* This scenario should ideally never occur. But if it ever does,
934 * FW is out of sync and needs a power cycle.
935 */
936 bt_dev_err(hdev, "Something went wrong during FW download");
937 bt_dev_err(hdev, "Please power cycle and try again");
938 goto free_skb;
939 }
940
941 serdev_device_write_buf(nxpdev->serdev, nxpdev->fw->data + offset -
942 nxpdev->fw_v3_offset_correction, len);
943
944free_skb:
945 kfree_skb(skb);
946 return 0;
947}
948
949static int nxp_set_baudrate_cmd(struct hci_dev *hdev, void *data)
950{
951 struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
952 __le32 new_baudrate = __cpu_to_le32(nxpdev->new_baudrate);
953 struct ps_data *psdata = &nxpdev->psdata;
954 struct sk_buff *skb;
955 u8 *status;
956
957 if (!psdata)
958 return 0;
959
960 skb = nxp_drv_send_cmd(hdev, HCI_NXP_SET_OPER_SPEED, 4, (u8 *)&new_baudrate);
961 if (IS_ERR(skb)) {
962 bt_dev_err(hdev, "Setting baudrate failed (%ld)", PTR_ERR(skb));
963 return PTR_ERR(skb);
964 }
965
966 status = (u8 *)skb_pull_data(skb, 1);
967 if (status) {
968 if (*status == 0) {
969 serdev_device_set_baudrate(nxpdev->serdev, nxpdev->new_baudrate);
970 nxpdev->current_baudrate = nxpdev->new_baudrate;
971 }
972 bt_dev_dbg(hdev, "Set baudrate response: status=%d, baudrate=%d",
973 *status, nxpdev->new_baudrate);
974 }
975 kfree_skb(skb);
976
977 return 0;
978}
979
980static int nxp_check_boot_sign(struct btnxpuart_dev *nxpdev)
981{
982 serdev_device_set_baudrate(nxpdev->serdev, HCI_NXP_PRI_BAUDRATE);
983 if (test_bit(BTNXPUART_IR_IN_PROGRESS, &nxpdev->tx_state))
984 serdev_device_set_flow_control(nxpdev->serdev, false);
985 else
986 serdev_device_set_flow_control(nxpdev->serdev, true);
987 set_bit(BTNXPUART_CHECK_BOOT_SIGNATURE, &nxpdev->tx_state);
988
989 return wait_event_interruptible_timeout(nxpdev->check_boot_sign_wait_q,
990 !test_bit(BTNXPUART_CHECK_BOOT_SIGNATURE,
991 &nxpdev->tx_state),
992 msecs_to_jiffies(1000));
993}
994
995static int nxp_set_ind_reset(struct hci_dev *hdev, void *data)
996{
997 static const u8 ir_hw_err[] = { HCI_EV_HARDWARE_ERROR,
998 0x01, BTNXPUART_IR_HW_ERR };
999 struct sk_buff *skb;
1000
1001 skb = bt_skb_alloc(3, GFP_ATOMIC);
1002 if (!skb)
1003 return -ENOMEM;
1004
1005 hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
1006 skb_put_data(skb, ir_hw_err, 3);
1007
1008 /* Inject Hardware Error to upper stack */
1009 return hci_recv_frame(hdev, skb);
1010}
1011
1012/* NXP protocol */
1013static int nxp_setup(struct hci_dev *hdev)
1014{
1015 struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
1016 int err = 0;
1017
1018 if (nxp_check_boot_sign(nxpdev)) {
1019 bt_dev_dbg(hdev, "Need FW Download.");
1020 err = nxp_download_firmware(hdev);
1021 if (err < 0)
1022 return err;
1023 } else {
1024 bt_dev_dbg(hdev, "FW already running.");
1025 clear_bit(BTNXPUART_FW_DOWNLOADING, &nxpdev->tx_state);
1026 }
1027
1028 serdev_device_set_baudrate(nxpdev->serdev, nxpdev->fw_init_baudrate);
1029 nxpdev->current_baudrate = nxpdev->fw_init_baudrate;
1030
1031 if (nxpdev->current_baudrate != HCI_NXP_SEC_BAUDRATE) {
1032 nxpdev->new_baudrate = HCI_NXP_SEC_BAUDRATE;
1033 hci_cmd_sync_queue(hdev, nxp_set_baudrate_cmd, NULL, NULL);
1034 }
1035
1036 ps_init(hdev);
1037
1038 if (test_and_clear_bit(BTNXPUART_IR_IN_PROGRESS, &nxpdev->tx_state))
1039 hci_dev_clear_flag(hdev, HCI_SETUP);
1040
1041 return 0;
1042}
1043
1044static void nxp_hw_err(struct hci_dev *hdev, u8 code)
1045{
1046 struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
1047
1048 switch (code) {
1049 case BTNXPUART_IR_HW_ERR:
1050 set_bit(BTNXPUART_IR_IN_PROGRESS, &nxpdev->tx_state);
1051 hci_dev_set_flag(hdev, HCI_SETUP);
1052 break;
1053 default:
1054 break;
1055 }
1056}
1057
1058static int nxp_shutdown(struct hci_dev *hdev)
1059{
1060 struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
1061 struct sk_buff *skb;
1062 u8 *status;
1063 u8 pcmd = 0;
1064
1065 if (test_bit(BTNXPUART_IR_IN_PROGRESS, &nxpdev->tx_state)) {
1066 skb = nxp_drv_send_cmd(hdev, HCI_NXP_IND_RESET, 1, &pcmd);
1067 if (IS_ERR(skb))
1068 return PTR_ERR(skb);
1069
1070 status = skb_pull_data(skb, 1);
1071 if (status) {
1072 serdev_device_set_flow_control(nxpdev->serdev, false);
1073 set_bit(BTNXPUART_FW_DOWNLOADING, &nxpdev->tx_state);
1074 }
1075 kfree_skb(skb);
1076 }
1077
1078 return 0;
1079}
1080
1081static int btnxpuart_queue_skb(struct hci_dev *hdev, struct sk_buff *skb)
1082{
1083 struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
1084
1085 /* Prepend skb with frame type */
1086 memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1);
1087 skb_queue_tail(&nxpdev->txq, skb);
1088 btnxpuart_tx_wakeup(nxpdev);
1089 return 0;
1090}
1091
1092static int nxp_enqueue(struct hci_dev *hdev, struct sk_buff *skb)
1093{
1094 struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
1095 struct ps_data *psdata = &nxpdev->psdata;
1096 struct hci_command_hdr *hdr;
1097 struct psmode_cmd_payload ps_parm;
1098 struct wakeup_cmd_payload wakeup_parm;
1099 __le32 baudrate_parm;
1100
1101 /* if vendor commands are received from user space (e.g. hcitool), update
1102 * driver flags accordingly and ask driver to re-send the command to FW.
1103 * In case the payload for any command does not match expected payload
1104 * length, let the firmware and user space program handle it, or throw
1105 * an error.
1106 */
1107 if (bt_cb(skb)->pkt_type == HCI_COMMAND_PKT && !psdata->driver_sent_cmd) {
1108 hdr = (struct hci_command_hdr *)skb->data;
1109 if (hdr->plen != (skb->len - HCI_COMMAND_HDR_SIZE))
1110 return btnxpuart_queue_skb(hdev, skb);
1111
1112 switch (__le16_to_cpu(hdr->opcode)) {
1113 case HCI_NXP_AUTO_SLEEP_MODE:
1114 if (hdr->plen == sizeof(ps_parm)) {
1115 memcpy(&ps_parm, skb->data + HCI_COMMAND_HDR_SIZE, hdr->plen);
1116 if (ps_parm.ps_cmd == BT_PS_ENABLE)
1117 psdata->target_ps_mode = PS_MODE_ENABLE;
1118 else if (ps_parm.ps_cmd == BT_PS_DISABLE)
1119 psdata->target_ps_mode = PS_MODE_DISABLE;
1120 psdata->c2h_ps_interval = __le16_to_cpu(ps_parm.c2h_ps_interval);
1121 hci_cmd_sync_queue(hdev, send_ps_cmd, NULL, NULL);
1122 goto free_skb;
1123 }
1124 break;
1125 case HCI_NXP_WAKEUP_METHOD:
1126 if (hdr->plen == sizeof(wakeup_parm)) {
1127 memcpy(&wakeup_parm, skb->data + HCI_COMMAND_HDR_SIZE, hdr->plen);
1128 psdata->c2h_wakeupmode = wakeup_parm.c2h_wakeupmode;
1129 psdata->c2h_wakeup_gpio = wakeup_parm.c2h_wakeup_gpio;
1130 psdata->h2c_wakeup_gpio = wakeup_parm.h2c_wakeup_gpio;
1131 switch (wakeup_parm.h2c_wakeupmode) {
1132 case BT_CTRL_WAKEUP_METHOD_DSR:
1133 psdata->h2c_wakeupmode = WAKEUP_METHOD_DTR;
1134 break;
1135 case BT_CTRL_WAKEUP_METHOD_BREAK:
1136 default:
1137 psdata->h2c_wakeupmode = WAKEUP_METHOD_BREAK;
1138 break;
1139 }
1140 hci_cmd_sync_queue(hdev, send_wakeup_method_cmd, NULL, NULL);
1141 goto free_skb;
1142 }
1143 break;
1144 case HCI_NXP_SET_OPER_SPEED:
1145 if (hdr->plen == sizeof(baudrate_parm)) {
1146 memcpy(&baudrate_parm, skb->data + HCI_COMMAND_HDR_SIZE, hdr->plen);
1147 nxpdev->new_baudrate = __le32_to_cpu(baudrate_parm);
1148 hci_cmd_sync_queue(hdev, nxp_set_baudrate_cmd, NULL, NULL);
1149 goto free_skb;
1150 }
1151 break;
1152 case HCI_NXP_IND_RESET:
1153 if (hdr->plen == 1) {
1154 hci_cmd_sync_queue(hdev, nxp_set_ind_reset, NULL, NULL);
1155 goto free_skb;
1156 }
1157 break;
1158 default:
1159 break;
1160 }
1161 }
1162
1163 return btnxpuart_queue_skb(hdev, skb);
1164
1165free_skb:
1166 kfree_skb(skb);
1167 return 0;
1168}
1169
1170static struct sk_buff *nxp_dequeue(void *data)
1171{
1172 struct btnxpuart_dev *nxpdev = (struct btnxpuart_dev *)data;
1173
1174 ps_wakeup(nxpdev);
1175 ps_start_timer(nxpdev);
1176 return skb_dequeue(&nxpdev->txq);
1177}
1178
1179/* btnxpuart based on serdev */
1180static void btnxpuart_tx_work(struct work_struct *work)
1181{
1182 struct btnxpuart_dev *nxpdev = container_of(work, struct btnxpuart_dev,
1183 tx_work);
1184 struct serdev_device *serdev = nxpdev->serdev;
1185 struct hci_dev *hdev = nxpdev->hdev;
1186 struct sk_buff *skb;
1187 int len;
1188
1189 while ((skb = nxp_dequeue(nxpdev))) {
1190 len = serdev_device_write_buf(serdev, skb->data, skb->len);
1191 hdev->stat.byte_tx += len;
1192
1193 skb_pull(skb, len);
1194 if (skb->len > 0) {
1195 skb_queue_head(&nxpdev->txq, skb);
1196 break;
1197 }
1198
1199 switch (hci_skb_pkt_type(skb)) {
1200 case HCI_COMMAND_PKT:
1201 hdev->stat.cmd_tx++;
1202 break;
1203 case HCI_ACLDATA_PKT:
1204 hdev->stat.acl_tx++;
1205 break;
1206 case HCI_SCODATA_PKT:
1207 hdev->stat.sco_tx++;
1208 break;
1209 }
1210
1211 kfree_skb(skb);
1212 }
1213 clear_bit(BTNXPUART_TX_STATE_ACTIVE, &nxpdev->tx_state);
1214}
1215
1216static int btnxpuart_open(struct hci_dev *hdev)
1217{
1218 struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
1219 int err = 0;
1220
1221 err = serdev_device_open(nxpdev->serdev);
1222 if (err) {
1223 bt_dev_err(hdev, "Unable to open UART device %s",
1224 dev_name(&nxpdev->serdev->dev));
1225 } else {
1226 set_bit(BTNXPUART_SERDEV_OPEN, &nxpdev->tx_state);
1227 }
1228 return err;
1229}
1230
1231static int btnxpuart_close(struct hci_dev *hdev)
1232{
1233 struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
1234
1235 ps_wakeup(nxpdev);
1236 serdev_device_close(nxpdev->serdev);
1237 clear_bit(BTNXPUART_SERDEV_OPEN, &nxpdev->tx_state);
1238 return 0;
1239}
1240
1241static int btnxpuart_flush(struct hci_dev *hdev)
1242{
1243 struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
1244
1245 /* Flush any pending characters */
1246 serdev_device_write_flush(nxpdev->serdev);
1247 skb_queue_purge(&nxpdev->txq);
1248
1249 cancel_work_sync(&nxpdev->tx_work);
1250
1251 kfree_skb(nxpdev->rx_skb);
1252 nxpdev->rx_skb = NULL;
1253
1254 return 0;
1255}
1256
1257static const struct h4_recv_pkt nxp_recv_pkts[] = {
1258 { H4_RECV_ACL, .recv = hci_recv_frame },
1259 { H4_RECV_SCO, .recv = hci_recv_frame },
1260 { H4_RECV_EVENT, .recv = hci_recv_frame },
1261 { NXP_RECV_CHIP_VER_V1, .recv = nxp_recv_chip_ver_v1 },
1262 { NXP_RECV_FW_REQ_V1, .recv = nxp_recv_fw_req_v1 },
1263 { NXP_RECV_CHIP_VER_V3, .recv = nxp_recv_chip_ver_v3 },
1264 { NXP_RECV_FW_REQ_V3, .recv = nxp_recv_fw_req_v3 },
1265};
1266
1267static ssize_t btnxpuart_receive_buf(struct serdev_device *serdev,
1268 const u8 *data, size_t count)
1269{
1270 struct btnxpuart_dev *nxpdev = serdev_device_get_drvdata(serdev);
1271
1272 ps_start_timer(nxpdev);
1273
1274 nxpdev->rx_skb = h4_recv_buf(nxpdev->hdev, nxpdev->rx_skb, data, count,
1275 nxp_recv_pkts, ARRAY_SIZE(nxp_recv_pkts));
1276 if (IS_ERR(nxpdev->rx_skb)) {
1277 int err = PTR_ERR(nxpdev->rx_skb);
1278 /* Safe to ignore out-of-sync bootloader signatures */
1279 if (!is_fw_downloading(nxpdev))
1280 bt_dev_err(nxpdev->hdev, "Frame reassembly failed (%d)", err);
1281 return count;
1282 }
1283 if (!is_fw_downloading(nxpdev))
1284 nxpdev->hdev->stat.byte_rx += count;
1285 return count;
1286}
1287
1288static void btnxpuart_write_wakeup(struct serdev_device *serdev)
1289{
1290 serdev_device_write_wakeup(serdev);
1291}
1292
1293static const struct serdev_device_ops btnxpuart_client_ops = {
1294 .receive_buf = btnxpuart_receive_buf,
1295 .write_wakeup = btnxpuart_write_wakeup,
1296};
1297
1298static int nxp_serdev_probe(struct serdev_device *serdev)
1299{
1300 struct hci_dev *hdev;
1301 struct btnxpuart_dev *nxpdev;
1302
1303 nxpdev = devm_kzalloc(&serdev->dev, sizeof(*nxpdev), GFP_KERNEL);
1304 if (!nxpdev)
1305 return -ENOMEM;
1306
1307 nxpdev->nxp_data = (struct btnxpuart_data *)device_get_match_data(&serdev->dev);
1308
1309 nxpdev->serdev = serdev;
1310 serdev_device_set_drvdata(serdev, nxpdev);
1311
1312 serdev_device_set_client_ops(serdev, &btnxpuart_client_ops);
1313
1314 INIT_WORK(&nxpdev->tx_work, btnxpuart_tx_work);
1315 skb_queue_head_init(&nxpdev->txq);
1316
1317 init_waitqueue_head(&nxpdev->fw_dnld_done_wait_q);
1318 init_waitqueue_head(&nxpdev->check_boot_sign_wait_q);
1319
1320 device_property_read_u32(&nxpdev->serdev->dev, "fw-init-baudrate",
1321 &nxpdev->fw_init_baudrate);
1322 if (!nxpdev->fw_init_baudrate)
1323 nxpdev->fw_init_baudrate = FW_INIT_BAUDRATE;
1324
1325 set_bit(BTNXPUART_FW_DOWNLOADING, &nxpdev->tx_state);
1326
1327 crc8_populate_msb(crc8_table, POLYNOMIAL8);
1328
1329 /* Initialize and register HCI device */
1330 hdev = hci_alloc_dev();
1331 if (!hdev) {
1332 dev_err(&serdev->dev, "Can't allocate HCI device\n");
1333 return -ENOMEM;
1334 }
1335
1336 nxpdev->hdev = hdev;
1337
1338 hdev->bus = HCI_UART;
1339 hci_set_drvdata(hdev, nxpdev);
1340
1341 hdev->manufacturer = MANUFACTURER_NXP;
1342 hdev->open = btnxpuart_open;
1343 hdev->close = btnxpuart_close;
1344 hdev->flush = btnxpuart_flush;
1345 hdev->setup = nxp_setup;
1346 hdev->send = nxp_enqueue;
1347 hdev->hw_error = nxp_hw_err;
1348 hdev->shutdown = nxp_shutdown;
1349 SET_HCIDEV_DEV(hdev, &serdev->dev);
1350
1351 if (hci_register_dev(hdev) < 0) {
1352 dev_err(&serdev->dev, "Can't register HCI device\n");
1353 hci_free_dev(hdev);
1354 return -ENODEV;
1355 }
1356
1357 ps_setup(hdev);
1358
1359 return 0;
1360}
1361
1362static void nxp_serdev_remove(struct serdev_device *serdev)
1363{
1364 struct btnxpuart_dev *nxpdev = serdev_device_get_drvdata(serdev);
1365 struct hci_dev *hdev = nxpdev->hdev;
1366
1367 /* Restore FW baudrate to fw_init_baudrate if changed.
1368 * This will ensure FW baudrate is in sync with
1369 * driver baudrate in case this driver is re-inserted.
1370 */
1371 if (nxpdev->current_baudrate != nxpdev->fw_init_baudrate) {
1372 nxpdev->new_baudrate = nxpdev->fw_init_baudrate;
1373 nxp_set_baudrate_cmd(hdev, NULL);
1374 }
1375
1376 ps_cancel_timer(nxpdev);
1377 hci_unregister_dev(hdev);
1378 hci_free_dev(hdev);
1379}
1380
1381static struct btnxpuart_data w8987_data __maybe_unused = {
1382 .helper_fw_name = NULL,
1383 .fw_name = FIRMWARE_W8987,
1384};
1385
1386static struct btnxpuart_data w8997_data __maybe_unused = {
1387 .helper_fw_name = FIRMWARE_HELPER,
1388 .fw_name = FIRMWARE_W8997,
1389};
1390
1391static const struct of_device_id nxpuart_of_match_table[] __maybe_unused = {
1392 { .compatible = "nxp,88w8987-bt", .data = &w8987_data },
1393 { .compatible = "nxp,88w8997-bt", .data = &w8997_data },
1394 { }
1395};
1396MODULE_DEVICE_TABLE(of, nxpuart_of_match_table);
1397
1398static struct serdev_device_driver nxp_serdev_driver = {
1399 .probe = nxp_serdev_probe,
1400 .remove = nxp_serdev_remove,
1401 .driver = {
1402 .name = "btnxpuart",
1403 .of_match_table = of_match_ptr(nxpuart_of_match_table),
1404 },
1405};
1406
1407module_serdev_device_driver(nxp_serdev_driver);
1408
1409MODULE_AUTHOR("Neeraj Sanjay Kale <neeraj.sanjaykale@nxp.com>");
1410MODULE_DESCRIPTION("NXP Bluetooth Serial driver");
1411MODULE_LICENSE("GPL");