1/*
2 * Copyright (c) 2013, The Linux Foundation. All rights reserved.
3 * Not a Contribution.
4 * Copyright 2012 The Android Open Source Project
5 *
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
8 * You may obtain a copy of the License at
9 *
10 *      http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 */
18
19/******************************************************************************
20 *
21 *  Filename:      userial_vendor.c
22 *
23 *  Description:   Contains vendor-specific userial functions
24 *
25 ******************************************************************************/
26
27#define LOG_TAG "bt_vendor"
28
29#include <utils/Log.h>
30#include <termios.h>
31#include <fcntl.h>
32#include <errno.h>
33#include <stdio.h>
34#include <string.h>
35#include "bt_vendor_qcom.h"
36#include "hci_uart.h"
37
38
39/******************************************************************************
40**  Constants & Macros
41******************************************************************************/
42
43#ifndef VNDUSERIAL_DBG
44#define VNDUSERIAL_DBG TRUE
45#endif
46
47#if (VNDUSERIAL_DBG == TRUE)
48#define VNDUSERIALDBG(param, ...) {ALOGI(param, ## __VA_ARGS__);}
49#else
50#define VNDUSERIALDBG(param, ...) {}
51#endif
52
53/******************************************************************************
54**  Global variables
55******************************************************************************/
56vnd_userial_cb_t vnd_userial;
57
58/*****************************************************************************
59**   Functions
60*****************************************************************************/
61
62/*******************************************************************************
63**
64** Function        userial_to_tcio_baud
65**
66** Description     helper function converts USERIAL baud rates into TCIO
67**                  conforming baud rates
68**
69** Returns         TRUE/FALSE
70**
71*******************************************************************************/
72uint8_t userial_to_tcio_baud(uint8_t cfg_baud, uint32_t *baud)
73{
74    if (cfg_baud == USERIAL_BAUD_115200)
75        *baud = B115200;
76    else if (cfg_baud == USERIAL_BAUD_4M)
77        *baud = B4000000;
78    else if (cfg_baud == USERIAL_BAUD_3M)
79        *baud = B3000000;
80    else if (cfg_baud == USERIAL_BAUD_2M)
81        *baud = B2000000;
82    else if (cfg_baud == USERIAL_BAUD_1M)
83        *baud = B1000000;
84    else if (cfg_baud == USERIAL_BAUD_921600)
85        *baud = B921600;
86    else if (cfg_baud == USERIAL_BAUD_460800)
87        *baud = B460800;
88    else if (cfg_baud == USERIAL_BAUD_230400)
89        *baud = B230400;
90    else if (cfg_baud == USERIAL_BAUD_57600)
91        *baud = B57600;
92    else if (cfg_baud == USERIAL_BAUD_19200)
93        *baud = B19200;
94    else if (cfg_baud == USERIAL_BAUD_9600)
95        *baud = B9600;
96    else if (cfg_baud == USERIAL_BAUD_1200)
97        *baud = B1200;
98    else if (cfg_baud == USERIAL_BAUD_600)
99        *baud = B600;
100    else
101    {
102        ALOGE( "userial vendor open: unsupported baud idx %i", cfg_baud);
103        *baud = B115200;
104        return FALSE;
105    }
106
107    return TRUE;
108}
109
110/*******************************************************************************
111**
112** Function        userial_to_baud_tcio
113**
114** Description     helper function converts TCIO baud rate into integer
115**
116** Returns         uint32_t
117**
118*******************************************************************************/
119int userial_tcio_baud_to_int(uint32_t baud)
120{
121    int baud_rate =0;
122
123    switch (baud)
124    {
125        case B600:
126            baud_rate = 600;
127            break;
128        case B1200:
129            baud_rate = 1200;
130            break;
131        case B9600:
132            baud_rate = 9600;
133            break;
134        case B19200:
135            baud_rate = 19200;
136            break;
137        case B57600:
138            baud_rate = 57600;
139            break;
140        case B115200:
141            baud_rate = 115200;
142            break;
143        case B230400:
144            baud_rate = 230400;
145            break;
146        case B460800:
147            baud_rate = 460800;
148            break;
149        case B921600:
150            baud_rate = 921600;
151            break;
152        case B1000000:
153            baud_rate = 1000000;
154            break;
155        case B2000000:
156            baud_rate = 2000000;
157            break;
158        case B3000000:
159            baud_rate = 3000000;
160            break;
161        case B4000000:
162            baud_rate = 4000000;
163            break;
164        default:
165            ALOGE( "%s: unsupported baud %d", __FUNCTION__, baud);
166            break;
167    }
168
169    ALOGI( "%s: Current Baudrate = %d bps", __FUNCTION__, baud_rate);
170    return baud_rate;
171}
172
173
174#if (BT_WAKE_VIA_USERIAL_IOCTL==TRUE)
175/*******************************************************************************
176**
177** Function        userial_ioctl_init_bt_wake
178**
179** Description     helper function to set the open state of the bt_wake if ioctl
180**                  is used. it should not hurt in the rfkill case but it might
181**                  be better to compile it out.
182**
183** Returns         none
184**
185*******************************************************************************/
186void userial_ioctl_init_bt_wake(int fd)
187{
188    uint32_t bt_wake_state;
189
190    /* assert BT_WAKE through ioctl */
191    ioctl(fd, USERIAL_IOCTL_BT_WAKE_ASSERT, NULL);
192    ioctl(fd, USERIAL_IOCTL_BT_WAKE_GET_ST, &bt_wake_state);
193    VNDUSERIALDBG("userial_ioctl_init_bt_wake read back BT_WAKE state=%i", \
194               bt_wake_state);
195}
196#endif // (BT_WAKE_VIA_USERIAL_IOCTL==TRUE)
197
198
199/*****************************************************************************
200**   Userial Vendor API Functions
201*****************************************************************************/
202
203/*******************************************************************************
204**
205** Function        userial_vendor_init
206**
207** Description     Initialize userial vendor-specific control block
208**
209** Returns         None
210**
211*******************************************************************************/
212void userial_vendor_init(void)
213{
214    vnd_userial.fd = -1;
215    snprintf(vnd_userial.port_name, VND_PORT_NAME_MAXLEN, "%s", BT_HS_UART_DEVICE);
216}
217
218/*******************************************************************************
219**
220** Function        userial_vendor_open
221**
222** Description     Open the serial port with the given configuration
223**
224** Returns         device fd
225**
226*******************************************************************************/
227int userial_vendor_open(tUSERIAL_CFG *p_cfg)
228{
229    uint32_t baud;
230    uint8_t data_bits;
231    uint16_t parity;
232    uint8_t stop_bits;
233
234    vnd_userial.fd = -1;
235
236    if (!userial_to_tcio_baud(p_cfg->baud, &baud))
237    {
238        return -1;
239    }
240
241    if(p_cfg->fmt & USERIAL_DATABITS_8)
242        data_bits = CS8;
243    else if(p_cfg->fmt & USERIAL_DATABITS_7)
244        data_bits = CS7;
245    else if(p_cfg->fmt & USERIAL_DATABITS_6)
246        data_bits = CS6;
247    else if(p_cfg->fmt & USERIAL_DATABITS_5)
248        data_bits = CS5;
249    else
250    {
251        ALOGE("userial vendor open: unsupported data bits");
252        return -1;
253    }
254
255    if(p_cfg->fmt & USERIAL_PARITY_NONE)
256        parity = 0;
257    else if(p_cfg->fmt & USERIAL_PARITY_EVEN)
258        parity = PARENB;
259    else if(p_cfg->fmt & USERIAL_PARITY_ODD)
260        parity = (PARENB | PARODD);
261    else
262    {
263        ALOGE("userial vendor open: unsupported parity bit mode");
264        return -1;
265    }
266
267    if(p_cfg->fmt & USERIAL_STOPBITS_1)
268        stop_bits = 0;
269    else if(p_cfg->fmt & USERIAL_STOPBITS_2)
270        stop_bits = CSTOPB;
271    else
272    {
273        ALOGE("userial vendor open: unsupported stop bits");
274        return -1;
275    }
276
277    ALOGI("userial vendor open: opening %s", vnd_userial.port_name);
278
279    if ((vnd_userial.fd = open(vnd_userial.port_name, O_RDWR|O_NOCTTY)) == -1)
280    {
281        ALOGE("userial vendor open: unable to open %s", vnd_userial.port_name);
282        return -1;
283    }
284
285    tcflush(vnd_userial.fd, TCIOFLUSH);
286
287    tcgetattr(vnd_userial.fd, &vnd_userial.termios);
288    cfmakeraw(&vnd_userial.termios);
289
290    /* Set UART Control Modes */
291    vnd_userial.termios.c_cflag |= CLOCAL;
292    vnd_userial.termios.c_cflag |= (CRTSCTS | stop_bits);
293
294    tcsetattr(vnd_userial.fd, TCSANOW, &vnd_userial.termios);
295
296    /* set input/output baudrate */
297    cfsetospeed(&vnd_userial.termios, baud);
298    cfsetispeed(&vnd_userial.termios, baud);
299    tcsetattr(vnd_userial.fd, TCSANOW, &vnd_userial.termios);
300
301    tcflush(vnd_userial.fd, TCIOFLUSH);
302
303#if (BT_WAKE_VIA_USERIAL_IOCTL==TRUE)
304    userial_ioctl_init_bt_wake(vnd_userial.fd);
305#endif
306
307    ALOGI("device fd = %d open", vnd_userial.fd);
308
309    return vnd_userial.fd;
310}
311
312/*******************************************************************************
313**
314** Function        userial_vendor_close
315**
316** Description     Conduct vendor-specific close work
317**
318** Returns         None
319**
320*******************************************************************************/
321void userial_vendor_close(void)
322{
323    int result;
324
325    if (vnd_userial.fd == -1)
326        return;
327
328#if (BT_WAKE_VIA_USERIAL_IOCTL==TRUE)
329    /* de-assert bt_wake BEFORE closing port */
330    ioctl(vnd_userial.fd, USERIAL_IOCTL_BT_WAKE_DEASSERT, NULL);
331#endif
332
333    ALOGI("device fd = %d close", vnd_userial.fd);
334
335    if ((result = close(vnd_userial.fd)) < 0)
336        ALOGE( "close(fd:%d) FAILED result:%d", vnd_userial.fd, result);
337
338    vnd_userial.fd = -1;
339}
340
341/*******************************************************************************
342**
343** Function        userial_vendor_set_baud
344**
345** Description     Set new baud rate
346**
347** Returns         None
348**
349*******************************************************************************/
350void userial_vendor_set_baud(uint8_t userial_baud)
351{
352    uint32_t tcio_baud;
353
354    VNDUSERIALDBG("## userial_vendor_set_baud: %d", userial_baud);
355
356    userial_to_tcio_baud(userial_baud, &tcio_baud);
357
358    cfsetospeed(&vnd_userial.termios, tcio_baud);
359    cfsetispeed(&vnd_userial.termios, tcio_baud);
360    tcsetattr(vnd_userial.fd, TCSADRAIN, &vnd_userial.termios); /* don't change speed until last write done */
361}
362
363/*******************************************************************************
364**
365** Function        userial_vendor_get_baud
366**
367** Description     Get current baud rate
368**
369** Returns         int
370**
371*******************************************************************************/
372int userial_vendor_get_baud(void)
373{
374    if (vnd_userial.fd == -1)
375    {
376        ALOGE( "%s: uart port(%s) has not been opened", __FUNCTION__, BT_HS_UART_DEVICE );
377        return -1;
378    }
379
380    return userial_tcio_baud_to_int(cfgetispeed(&vnd_userial.termios));
381}
382
383/*******************************************************************************
384**
385** Function        userial_vendor_ioctl
386**
387** Description     ioctl inteface
388**
389** Returns         None
390**
391*******************************************************************************/
392int userial_vendor_ioctl(userial_vendor_ioctl_op_t op, int *p_data)
393{
394    int err;
395
396    switch(op)
397    {
398#if (BT_WAKE_VIA_USERIAL_IOCTL==TRUE)
399        case USERIAL_OP_ASSERT_BT_WAKE:
400            VNDUSERIALDBG("## userial_vendor_ioctl: Asserting BT_Wake ##");
401            err = ioctl(vnd_userial.fd, USERIAL_IOCTL_BT_WAKE_ASSERT, NULL);
402            break;
403
404        case USERIAL_OP_DEASSERT_BT_WAKE:
405            VNDUSERIALDBG("## userial_vendor_ioctl: De-asserting BT_Wake ##");
406            err = ioctl(vnd_userial.fd, USERIAL_IOCTL_BT_WAKE_DEASSERT, NULL);
407            break;
408
409        case USERIAL_OP_GET_BT_WAKE_STATE:
410            err = ioctl(vnd_userial.fd, USERIAL_IOCTL_BT_WAKE_GET_ST, p_data);
411            break;
412#endif  //  (BT_WAKE_VIA_USERIAL_IOCTL==TRUE)
413        case USERIAL_OP_FLOW_ON:
414            ALOGI("## userial_vendor_ioctl: UART Flow On ");
415            *p_data |=TIOCM_RTS;
416            err = ioctl(vnd_userial.fd, TIOCMSET, p_data);
417            break;
418
419        case USERIAL_OP_FLOW_OFF:
420            ALOGI("## userial_vendor_ioctl: UART Flow Off ");
421            ioctl(vnd_userial.fd, TIOCMGET, p_data);
422            *p_data &= ~TIOCM_RTS;
423            err = ioctl(vnd_userial.fd, TIOCMSET, p_data);
424            break;
425
426        default:
427            break;
428    }
429
430    return err;
431}
432
433/*******************************************************************************
434**
435** Function        userial_set_port
436**
437** Description     Configure UART port name
438**
439** Returns         0 : Success
440**                 Otherwise : Fail
441**
442*******************************************************************************/
443int userial_set_port(char *p_conf_name, char *p_conf_value, int param)
444{
445    strlcpy(vnd_userial.port_name, p_conf_value, VND_PORT_NAME_MAXLEN);
446
447    return 0;
448}
449
450/*******************************************************************************
451**
452** Function        read_hci_event
453**
454** Description     Read HCI event during vendor initialization
455**
456** Returns         int: size to read
457**
458*******************************************************************************/
459int read_hci_event(int fd, unsigned char* buf, int size)
460{
461    int remain, r;
462    int count = 0;
463
464    if (size <= 0) {
465        ALOGE("Invalid size arguement!");
466        return -1;
467    }
468
469    ALOGI("%s: Wait for Command Compete Event from SOC", __FUNCTION__);
470
471    /* The first byte identifies the packet type. For HCI event packets, it
472     * should be 0x04, so we read until we get to the 0x04. */
473    while (1) {
474            r = read(fd, buf, 1);
475            if (r <= 0)
476                    return -1;
477            if (buf[0] == 0x04)
478                    break;
479    }
480    count++;
481
482    /* The next two bytes are the event code and parameter total length. */
483    while (count < 3) {
484            r = read(fd, buf + count, 3 - count);
485            if (r <= 0)
486                    return -1;
487            count += r;
488    }
489
490    /* Now we read the parameters. */
491    if (buf[2] < (size - 3))
492            remain = buf[2];
493    else
494            remain = size - 3;
495
496    while ((count - 3) < remain) {
497            r = read(fd, buf + count, remain - (count - 3));
498            if (r <= 0)
499                    return -1;
500            count += r;
501    }
502    return count;
503}
504
505int userial_clock_operation(int fd, int cmd)
506{
507    int ret = 0;
508
509    switch (cmd)
510    {
511        case USERIAL_OP_CLK_ON:
512        case USERIAL_OP_CLK_OFF:
513             ioctl(fd, cmd);
514             break;
515        case USERIAL_OP_CLK_STATE:
516             ret = ioctl(fd, cmd);
517             break;
518    }
519
520    return ret;
521}
522