2 * Shared Transport Line discipline driver Core
3 * Init Manager module responsible for GPIO control
4 * and firmware download
5 * Copyright (C) 2009-2010 Texas Instruments
6 * Author: Pavan Savoy <pavan_savoy@ti.com>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 #define pr_fmt(fmt) "(stk) :" fmt
24 #include <linux/platform_device.h>
25 #include <linux/jiffies.h>
26 #include <linux/firmware.h>
27 #include <linux/delay.h>
28 #include <linux/wait.h>
29 #include <linux/gpio.h>
30 #include <linux/debugfs.h>
31 #include <linux/seq_file.h>
32 #include <linux/sched.h>
33 #include <linux/sysfs.h>
34 #include <linux/tty.h>
36 #include <linux/skbuff.h>
37 #include <linux/ti_wilink_st.h>
38 #include <linux/module.h>
41 #define MAX_ST_DEVICES 3 /* Imagine 1 on each UART for now */
42 static struct platform_device
*st_kim_devices
[MAX_ST_DEVICES
];
44 /**********************************************************************/
45 /* internal functions */
48 * st_get_plat_device -
49 * function which returns the reference to the platform device
50 * requested by id. As of now only 1 such device exists (id=0)
51 * the context requesting for reference can get the id to be
52 * requested by a. The protocol driver which is registering or
53 * b. the tty device which is opened.
55 static struct platform_device
*st_get_plat_device(int id
)
57 return st_kim_devices
[id
];
61 * validate_firmware_response -
62 * function to return whether the firmware response was proper
63 * in case of error don't complete so that waiting for proper
66 void validate_firmware_response(struct kim_data_s
*kim_gdata
)
68 struct sk_buff
*skb
= kim_gdata
->rx_skb
;
69 if (unlikely(skb
->data
[5] != 0)) {
70 pr_err("no proper response during fw download");
71 pr_err("data6 %x", skb
->data
[5]);
73 return; /* keep waiting for the proper response */
75 /* becos of all the script being downloaded */
76 complete_all(&kim_gdata
->kim_rcvd
);
80 /* check for data len received inside kim_int_recv
81 * most often hit the last case to update state to waiting for data
83 static inline int kim_check_data_len(struct kim_data_s
*kim_gdata
, int len
)
85 register int room
= skb_tailroom(kim_gdata
->rx_skb
);
87 pr_debug("len %d room %d", len
, room
);
90 validate_firmware_response(kim_gdata
);
91 } else if (len
> room
) {
92 /* Received packet's payload length is larger.
93 * We can't accommodate it in created skb.
95 pr_err("Data length is too large len %d room %d", len
,
97 kfree_skb(kim_gdata
->rx_skb
);
99 /* Packet header has non-zero payload length and
100 * we have enough space in created skb. Lets read
102 kim_gdata
->rx_state
= ST_W4_DATA
;
103 kim_gdata
->rx_count
= len
;
107 /* Change ST LL state to continue to process next
109 kim_gdata
->rx_state
= ST_W4_PACKET_TYPE
;
110 kim_gdata
->rx_skb
= NULL
;
111 kim_gdata
->rx_count
= 0;
117 * kim_int_recv - receive function called during firmware download
118 * firmware download responses on different UART drivers
119 * have been observed to come in bursts of different
120 * tty_receive and hence the logic
122 void kim_int_recv(struct kim_data_s
*kim_gdata
,
123 const unsigned char *data
, long count
)
125 const unsigned char *ptr
;
126 int len
= 0, type
= 0;
129 pr_debug("%s", __func__
);
130 /* Decode received bytes here */
132 if (unlikely(ptr
== NULL
)) {
133 pr_err(" received null from TTY ");
138 if (kim_gdata
->rx_count
) {
139 len
= min_t(unsigned int, kim_gdata
->rx_count
, count
);
140 memcpy(skb_put(kim_gdata
->rx_skb
, len
), ptr
, len
);
141 kim_gdata
->rx_count
-= len
;
145 if (kim_gdata
->rx_count
)
148 /* Check ST RX state machine , where are we? */
149 switch (kim_gdata
->rx_state
) {
150 /* Waiting for complete packet ? */
152 pr_debug("Complete pkt received");
153 validate_firmware_response(kim_gdata
);
154 kim_gdata
->rx_state
= ST_W4_PACKET_TYPE
;
155 kim_gdata
->rx_skb
= NULL
;
157 /* Waiting for Bluetooth event header ? */
160 (unsigned char *)&kim_gdata
->rx_skb
->data
[1];
161 pr_debug("event hdr: plen 0x%02x\n", *plen
);
162 kim_check_data_len(kim_gdata
, *plen
);
164 } /* end of switch */
165 } /* end of if rx_state */
167 /* Bluetooth event packet? */
169 kim_gdata
->rx_state
= ST_W4_HEADER
;
170 kim_gdata
->rx_count
= 2;
174 pr_info("unknown packet");
182 alloc_skb(1024+8, GFP_ATOMIC
);
183 if (!kim_gdata
->rx_skb
) {
184 pr_err("can't allocate mem for new packet");
185 kim_gdata
->rx_state
= ST_W4_PACKET_TYPE
;
186 kim_gdata
->rx_count
= 0;
189 skb_reserve(kim_gdata
->rx_skb
, 8);
190 kim_gdata
->rx_skb
->cb
[0] = 4;
191 kim_gdata
->rx_skb
->cb
[1] = 0;
197 static long read_local_version(struct kim_data_s
*kim_gdata
, char *bts_scr_name
)
199 unsigned short version
= 0, chip
= 0, min_ver
= 0, maj_ver
= 0;
200 const char read_ver_cmd
[] = { 0x01, 0x01, 0x10, 0x00 };
202 pr_debug("%s", __func__
);
204 INIT_COMPLETION(kim_gdata
->kim_rcvd
);
205 if (4 != st_int_write(kim_gdata
->core_data
, read_ver_cmd
, 4)) {
206 pr_err("kim: couldn't write 4 bytes");
210 if (!wait_for_completion_timeout
211 (&kim_gdata
->kim_rcvd
, msecs_to_jiffies(CMD_RESP_TIME
))) {
212 pr_err(" waiting for ver info- timed out ");
215 INIT_COMPLETION(kim_gdata
->kim_rcvd
);
218 MAKEWORD(kim_gdata
->resp_buffer
[13],
219 kim_gdata
->resp_buffer
[14]);
220 chip
= (version
& 0x7C00) >> 10;
221 min_ver
= (version
& 0x007F);
222 maj_ver
= (version
& 0x0380) >> 7;
224 if (version
& 0x8000)
227 sprintf(bts_scr_name
, "TIInit_%d.%d.%d.bts", chip
, maj_ver
, min_ver
);
229 /* to be accessed later via sysfs entry */
230 kim_gdata
->version
.full
= version
;
231 kim_gdata
->version
.chip
= chip
;
232 kim_gdata
->version
.maj_ver
= maj_ver
;
233 kim_gdata
->version
.min_ver
= min_ver
;
235 pr_info("%s", bts_scr_name
);
239 void skip_change_remote_baud(unsigned char **ptr
, long *len
)
241 unsigned char *nxt_action
, *cur_action
;
244 nxt_action
= cur_action
+ sizeof(struct bts_action
) +
245 ((struct bts_action
*) cur_action
)->size
;
247 if (((struct bts_action
*) nxt_action
)->type
!= ACTION_WAIT_EVENT
) {
248 pr_err("invalid action after change remote baud command");
250 *ptr
= *ptr
+ sizeof(struct bts_action
) +
251 ((struct bts_action
*)cur_action
)->size
;
252 *len
= *len
- (sizeof(struct bts_action
) +
253 ((struct bts_action
*)cur_action
)->size
);
254 /* warn user on not commenting these in firmware */
255 pr_warn("skipping the wait event of change remote baud");
260 * download_firmware -
261 * internal function which parses through the .bts firmware
262 * script file intreprets SEND, DELAY actions only as of now
264 static long download_firmware(struct kim_data_s
*kim_gdata
)
268 unsigned char *ptr
= NULL
;
269 unsigned char *action_ptr
= NULL
;
270 unsigned char bts_scr_name
[30] = { 0 }; /* 30 char long bts scr name? */
273 unsigned long timeout
;
275 err
= read_local_version(kim_gdata
, bts_scr_name
);
277 pr_err("kim: failed to read local ver");
281 request_firmware(&kim_gdata
->fw_entry
, bts_scr_name
,
282 &kim_gdata
->kim_pdev
->dev
);
283 if (unlikely((err
!= 0) || (kim_gdata
->fw_entry
->data
== NULL
) ||
284 (kim_gdata
->fw_entry
->size
== 0))) {
285 pr_err(" request_firmware failed(errno %ld) for %s", err
,
289 ptr
= (void *)kim_gdata
->fw_entry
->data
;
290 len
= kim_gdata
->fw_entry
->size
;
291 /* bts_header to remove out magic number and
294 ptr
+= sizeof(struct bts_header
);
295 len
-= sizeof(struct bts_header
);
297 while (len
> 0 && ptr
) {
298 pr_debug(" action size %d, type %d ",
299 ((struct bts_action
*)ptr
)->size
,
300 ((struct bts_action
*)ptr
)->type
);
302 switch (((struct bts_action
*)ptr
)->type
) {
303 case ACTION_SEND_COMMAND
: /* action send */
305 action_ptr
= &(((struct bts_action
*)ptr
)->data
[0]);
307 (((struct hci_command
*)action_ptr
)->opcode
==
309 /* ignore remote change
310 * baud rate HCI VS command */
311 pr_warn("change remote baud"
312 " rate command in firmware");
313 skip_change_remote_baud(&ptr
, &len
);
317 * Make sure we have enough free space in uart
318 * tx buffer to write current firmware command
320 cmd_size
= ((struct bts_action
*)ptr
)->size
;
321 timeout
= jiffies
+ msecs_to_jiffies(CMD_WR_TIME
);
324 st_get_uart_wr_room(kim_gdata
->core_data
);
325 if (wr_room_space
< 0) {
326 pr_err("Unable to get free "
327 "space info from uart tx buffer");
328 release_firmware(kim_gdata
->fw_entry
);
329 return wr_room_space
;
331 mdelay(1); /* wait 1ms before checking room */
332 } while ((wr_room_space
< cmd_size
) &&
333 time_before(jiffies
, timeout
));
335 /* Timeout happened ? */
336 if (time_after_eq(jiffies
, timeout
)) {
337 pr_err("Timeout while waiting for free "
338 "free space in uart tx buffer");
339 release_firmware(kim_gdata
->fw_entry
);
342 /* reinit completion before sending for the
345 INIT_COMPLETION(kim_gdata
->kim_rcvd
);
348 * Free space found in uart buffer, call st_int_write
349 * to send current firmware command to the uart tx
352 err
= st_int_write(kim_gdata
->core_data
,
353 ((struct bts_action_send
*)action_ptr
)->data
,
354 ((struct bts_action
*)ptr
)->size
);
355 if (unlikely(err
< 0)) {
356 release_firmware(kim_gdata
->fw_entry
);
360 * Check number of bytes written to the uart tx buffer
361 * and requested command write size
363 if (err
!= cmd_size
) {
364 pr_err("Number of bytes written to uart "
365 "tx buffer are not matching with "
366 "requested cmd write size");
367 release_firmware(kim_gdata
->fw_entry
);
371 case ACTION_WAIT_EVENT
: /* wait */
373 if (!wait_for_completion_timeout
374 (&kim_gdata
->kim_rcvd
,
375 msecs_to_jiffies(CMD_RESP_TIME
))) {
376 pr_err("response timeout during fw download ");
378 release_firmware(kim_gdata
->fw_entry
);
381 INIT_COMPLETION(kim_gdata
->kim_rcvd
);
383 case ACTION_DELAY
: /* sleep */
384 pr_info("sleep command in scr");
385 action_ptr
= &(((struct bts_action
*)ptr
)->data
[0]);
386 mdelay(((struct bts_action_delay
*)action_ptr
)->msec
);
390 len
- (sizeof(struct bts_action
) +
391 ((struct bts_action
*)ptr
)->size
);
393 ptr
+ sizeof(struct bts_action
) +
394 ((struct bts_action
*)ptr
)->size
;
396 /* fw download complete */
397 release_firmware(kim_gdata
->fw_entry
);
401 /**********************************************************************/
402 /* functions called from ST core */
403 /* called from ST Core, when REG_IN_PROGRESS (registration in progress)
405 * 1. response to read local version
406 * 2. during send/recv's of firmware download
408 void st_kim_recv(void *disc_data
, const unsigned char *data
, long count
)
410 struct st_data_s
*st_gdata
= (struct st_data_s
*)disc_data
;
411 struct kim_data_s
*kim_gdata
= st_gdata
->kim_data
;
413 /* copy to local buffer */
414 if (unlikely(data
[4] == 0x01 && data
[5] == 0x10 && data
[0] == 0x04)) {
415 /* must be the read_ver_cmd */
416 memcpy(kim_gdata
->resp_buffer
, data
, count
);
417 complete_all(&kim_gdata
->kim_rcvd
);
420 kim_int_recv(kim_gdata
, data
, count
);
421 /* either completes or times out */
426 /* to signal completion of line discipline installation
427 * called from ST Core, upon tty_open
429 void st_kim_complete(void *kim_data
)
431 struct kim_data_s
*kim_gdata
= (struct kim_data_s
*)kim_data
;
432 complete(&kim_gdata
->ldisc_installed
);
436 * st_kim_start - called from ST Core upon 1st registration
437 * This involves toggling the chip enable gpio, reading
438 * the firmware version from chip, forming the fw file name
439 * based on the chip version, requesting the fw, parsing it
440 * and perform download(send/recv).
442 long st_kim_start(void *kim_data
)
445 long retry
= POR_RETRY_COUNT
;
446 struct ti_st_plat_data
*pdata
;
447 struct kim_data_s
*kim_gdata
= (struct kim_data_s
*)kim_data
;
449 pr_info(" %s", __func__
);
450 pdata
= kim_gdata
->kim_pdev
->dev
.platform_data
;
453 /* platform specific enabling code here */
454 if (pdata
->chip_enable
)
455 pdata
->chip_enable(kim_gdata
);
457 /* Configure BT nShutdown to HIGH state */
458 gpio_set_value(kim_gdata
->nshutdown
, GPIO_LOW
);
459 mdelay(5); /* FIXME: a proper toggle */
460 gpio_set_value(kim_gdata
->nshutdown
, GPIO_HIGH
);
462 /* re-initialize the completion */
463 INIT_COMPLETION(kim_gdata
->ldisc_installed
);
464 /* send notification to UIM */
465 kim_gdata
->ldisc_install
= 1;
466 pr_info("ldisc_install = 1");
467 sysfs_notify(&kim_gdata
->kim_pdev
->dev
.kobj
,
469 /* wait for ldisc to be installed */
470 err
= wait_for_completion_timeout(&kim_gdata
->ldisc_installed
,
471 msecs_to_jiffies(LDISC_TIME
));
473 /* ldisc installation timeout,
474 * flush uart, power cycle BT_EN */
475 pr_err("ldisc installation timeout");
476 err
= st_kim_stop(kim_gdata
);
479 /* ldisc installed now */
480 pr_info("line discipline installed");
481 err
= download_firmware(kim_gdata
);
483 /* ldisc installed but fw download failed,
484 * flush uart & power cycle BT_EN */
485 pr_err("download firmware failed");
486 err
= st_kim_stop(kim_gdata
);
488 } else { /* on success don't retry */
497 * st_kim_stop - stop communication with chip.
498 * This can be called from ST Core/KIM, on the-
499 * (a) last un-register when chip need not be powered there-after,
500 * (b) upon failure to either install ldisc or download firmware.
501 * The function is responsible to (a) notify UIM about un-installation,
502 * (b) flush UART if the ldisc was installed.
503 * (c) reset BT_EN - pull down nshutdown at the end.
504 * (d) invoke platform's chip disabling routine.
506 long st_kim_stop(void *kim_data
)
509 struct kim_data_s
*kim_gdata
= (struct kim_data_s
*)kim_data
;
510 struct ti_st_plat_data
*pdata
=
511 kim_gdata
->kim_pdev
->dev
.platform_data
;
512 struct tty_struct
*tty
= kim_gdata
->core_data
->tty
;
514 INIT_COMPLETION(kim_gdata
->ldisc_installed
);
516 if (tty
) { /* can be called before ldisc is installed */
517 /* Flush any pending characters in the driver and discipline. */
518 tty_ldisc_flush(tty
);
519 tty_driver_flush_buffer(tty
);
520 tty
->ops
->flush_buffer(tty
);
523 /* send uninstall notification to UIM */
524 pr_info("ldisc_install = 0");
525 kim_gdata
->ldisc_install
= 0;
526 sysfs_notify(&kim_gdata
->kim_pdev
->dev
.kobj
, NULL
, "install");
528 /* wait for ldisc to be un-installed */
529 err
= wait_for_completion_timeout(&kim_gdata
->ldisc_installed
,
530 msecs_to_jiffies(LDISC_TIME
));
531 if (!err
) { /* timeout */
532 pr_err(" timed out waiting for ldisc to be un-installed");
536 /* By default configure BT nShutdown to LOW state */
537 gpio_set_value(kim_gdata
->nshutdown
, GPIO_LOW
);
539 gpio_set_value(kim_gdata
->nshutdown
, GPIO_HIGH
);
541 gpio_set_value(kim_gdata
->nshutdown
, GPIO_LOW
);
543 /* platform specific disable */
544 if (pdata
->chip_disable
)
545 pdata
->chip_disable(kim_gdata
);
549 /**********************************************************************/
550 /* functions called from subsystems */
551 /* called when debugfs entry is read from */
553 static int show_version(struct seq_file
*s
, void *unused
)
555 struct kim_data_s
*kim_gdata
= (struct kim_data_s
*)s
->private;
556 seq_printf(s
, "%04X %d.%d.%d\n", kim_gdata
->version
.full
,
557 kim_gdata
->version
.chip
, kim_gdata
->version
.maj_ver
,
558 kim_gdata
->version
.min_ver
);
562 static int show_list(struct seq_file
*s
, void *unused
)
564 struct kim_data_s
*kim_gdata
= (struct kim_data_s
*)s
->private;
565 kim_st_list_protocols(kim_gdata
->core_data
, s
);
569 static ssize_t
show_install(struct device
*dev
,
570 struct device_attribute
*attr
, char *buf
)
572 struct kim_data_s
*kim_data
= dev_get_drvdata(dev
);
573 return sprintf(buf
, "%d\n", kim_data
->ldisc_install
);
577 static ssize_t
store_dev_name(struct device
*dev
,
578 struct device_attribute
*attr
, const char *buf
, size_t count
)
580 struct kim_data_s
*kim_data
= dev_get_drvdata(dev
);
581 pr_debug("storing dev name >%s<", buf
);
582 strncpy(kim_data
->dev_name
, buf
, count
);
583 pr_debug("stored dev name >%s<", kim_data
->dev_name
);
587 static ssize_t
store_baud_rate(struct device
*dev
,
588 struct device_attribute
*attr
, const char *buf
, size_t count
)
590 struct kim_data_s
*kim_data
= dev_get_drvdata(dev
);
591 pr_debug("storing baud rate >%s<", buf
);
592 sscanf(buf
, "%ld", &kim_data
->baud_rate
);
593 pr_debug("stored baud rate >%ld<", kim_data
->baud_rate
);
596 #endif /* if DEBUG */
598 static ssize_t
show_dev_name(struct device
*dev
,
599 struct device_attribute
*attr
, char *buf
)
601 struct kim_data_s
*kim_data
= dev_get_drvdata(dev
);
602 return sprintf(buf
, "%s\n", kim_data
->dev_name
);
605 static ssize_t
show_baud_rate(struct device
*dev
,
606 struct device_attribute
*attr
, char *buf
)
608 struct kim_data_s
*kim_data
= dev_get_drvdata(dev
);
609 return sprintf(buf
, "%ld\n", kim_data
->baud_rate
);
612 static ssize_t
show_flow_cntrl(struct device
*dev
,
613 struct device_attribute
*attr
, char *buf
)
615 struct kim_data_s
*kim_data
= dev_get_drvdata(dev
);
616 return sprintf(buf
, "%d\n", kim_data
->flow_cntrl
);
619 /* structures specific for sysfs entries */
620 static struct kobj_attribute ldisc_install
=
621 __ATTR(install
, 0444, (void *)show_install
, NULL
);
623 static struct kobj_attribute uart_dev_name
=
624 #ifdef DEBUG /* TODO: move this to debug-fs if possible */
625 __ATTR(dev_name
, 0644, (void *)show_dev_name
, (void *)store_dev_name
);
627 __ATTR(dev_name
, 0444, (void *)show_dev_name
, NULL
);
630 static struct kobj_attribute uart_baud_rate
=
631 #ifdef DEBUG /* TODO: move to debugfs */
632 __ATTR(baud_rate
, 0644, (void *)show_baud_rate
, (void *)store_baud_rate
);
634 __ATTR(baud_rate
, 0444, (void *)show_baud_rate
, NULL
);
637 static struct kobj_attribute uart_flow_cntrl
=
638 __ATTR(flow_cntrl
, 0444, (void *)show_flow_cntrl
, NULL
);
640 static struct attribute
*uim_attrs
[] = {
643 &uart_baud_rate
.attr
,
644 &uart_flow_cntrl
.attr
,
648 static struct attribute_group uim_attr_grp
= {
653 * st_kim_ref - reference the core's data
654 * This references the per-ST platform device in the arch/xx/
656 * This would enable multiple such platform devices to exist
657 * on a given platform
659 void st_kim_ref(struct st_data_s
**core_data
, int id
)
661 struct platform_device
*pdev
;
662 struct kim_data_s
*kim_gdata
;
663 /* get kim_gdata reference from platform device */
664 pdev
= st_get_plat_device(id
);
669 kim_gdata
= dev_get_drvdata(&pdev
->dev
);
670 *core_data
= kim_gdata
->core_data
;
673 static int kim_version_open(struct inode
*i
, struct file
*f
)
675 return single_open(f
, show_version
, i
->i_private
);
678 static int kim_list_open(struct inode
*i
, struct file
*f
)
680 return single_open(f
, show_list
, i
->i_private
);
683 static const struct file_operations version_debugfs_fops
= {
685 .open
= kim_version_open
,
688 .release
= single_release
,
690 static const struct file_operations list_debugfs_fops
= {
692 .open
= kim_list_open
,
695 .release
= single_release
,
698 /**********************************************************************/
699 /* functions called from platform device driver subsystem
700 * need to have a relevant platform device entry in the platform's
704 struct dentry
*kim_debugfs_dir
;
705 static int kim_probe(struct platform_device
*pdev
)
708 struct kim_data_s
*kim_gdata
;
709 struct ti_st_plat_data
*pdata
= pdev
->dev
.platform_data
;
711 if ((pdev
->id
!= -1) && (pdev
->id
< MAX_ST_DEVICES
)) {
712 /* multiple devices could exist */
713 st_kim_devices
[pdev
->id
] = pdev
;
715 /* platform's sure about existence of 1 device */
716 st_kim_devices
[0] = pdev
;
719 kim_gdata
= kzalloc(sizeof(struct kim_data_s
), GFP_ATOMIC
);
721 pr_err("no mem to allocate");
724 dev_set_drvdata(&pdev
->dev
, kim_gdata
);
726 status
= st_core_init(&kim_gdata
->core_data
);
728 pr_err(" ST core init failed");
731 /* refer to itself */
732 kim_gdata
->core_data
->kim_data
= kim_gdata
;
734 /* Claim the chip enable nShutdown gpio from the system */
735 kim_gdata
->nshutdown
= pdata
->nshutdown_gpio
;
736 status
= gpio_request(kim_gdata
->nshutdown
, "kim");
737 if (unlikely(status
)) {
738 pr_err(" gpio %ld request failed ", kim_gdata
->nshutdown
);
742 /* Configure nShutdown GPIO as output=0 */
743 status
= gpio_direction_output(kim_gdata
->nshutdown
, 0);
744 if (unlikely(status
)) {
745 pr_err(" unable to configure gpio %ld", kim_gdata
->nshutdown
);
748 /* get reference of pdev for request_firmware
750 kim_gdata
->kim_pdev
= pdev
;
751 init_completion(&kim_gdata
->kim_rcvd
);
752 init_completion(&kim_gdata
->ldisc_installed
);
754 status
= sysfs_create_group(&pdev
->dev
.kobj
, &uim_attr_grp
);
756 pr_err("failed to create sysfs entries");
760 /* copying platform data */
761 strncpy(kim_gdata
->dev_name
, pdata
->dev_name
, UART_DEV_NAME_LEN
);
762 kim_gdata
->flow_cntrl
= pdata
->flow_cntrl
;
763 kim_gdata
->baud_rate
= pdata
->baud_rate
;
764 pr_info("sysfs entries created\n");
766 kim_debugfs_dir
= debugfs_create_dir("ti-st", NULL
);
767 if (IS_ERR(kim_debugfs_dir
)) {
768 pr_err(" debugfs entries creation failed ");
769 kim_debugfs_dir
= NULL
;
773 debugfs_create_file("version", S_IRUGO
, kim_debugfs_dir
,
774 kim_gdata
, &version_debugfs_fops
);
775 debugfs_create_file("protocols", S_IRUGO
, kim_debugfs_dir
,
776 kim_gdata
, &list_debugfs_fops
);
777 pr_info(" debugfs entries created ");
781 static int kim_remove(struct platform_device
*pdev
)
783 /* free the GPIOs requested */
784 struct ti_st_plat_data
*pdata
= pdev
->dev
.platform_data
;
785 struct kim_data_s
*kim_gdata
;
787 kim_gdata
= dev_get_drvdata(&pdev
->dev
);
789 /* Free the Bluetooth/FM/GPIO
790 * nShutdown gpio from the system
792 gpio_free(pdata
->nshutdown_gpio
);
793 pr_info("nshutdown GPIO Freed");
795 debugfs_remove_recursive(kim_debugfs_dir
);
796 sysfs_remove_group(&pdev
->dev
.kobj
, &uim_attr_grp
);
797 pr_info("sysfs entries removed");
799 kim_gdata
->kim_pdev
= NULL
;
800 st_core_exit(kim_gdata
->core_data
);
807 int kim_suspend(struct platform_device
*pdev
, pm_message_t state
)
809 struct ti_st_plat_data
*pdata
= pdev
->dev
.platform_data
;
812 return pdata
->suspend(pdev
, state
);
817 int kim_resume(struct platform_device
*pdev
)
819 struct ti_st_plat_data
*pdata
= pdev
->dev
.platform_data
;
822 return pdata
->resume(pdev
);
827 /**********************************************************************/
828 /* entry point for ST KIM module, called in from ST Core */
829 static struct platform_driver kim_platform_driver
= {
831 .remove
= kim_remove
,
832 .suspend
= kim_suspend
,
833 .resume
= kim_resume
,
836 .owner
= THIS_MODULE
,
840 static int __init
st_kim_init(void)
842 return platform_driver_register(&kim_platform_driver
);
845 static void __exit
st_kim_deinit(void)
847 platform_driver_unregister(&kim_platform_driver
);
851 module_init(st_kim_init
);
852 module_exit(st_kim_deinit
);
853 MODULE_AUTHOR("Pavan Savoy <pavan_savoy@ti.com>");
854 MODULE_DESCRIPTION("Shared Transport Driver for TI BT/FM/GPS combo chips ");
855 MODULE_LICENSE("GPL");