Commit | Line | Data |
---|---|---|
d0088ce1 PS |
1 | /* |
2 | * Shared Transport Line discipline driver Core | |
3 | * Init Manager module responsible for GPIO control | |
4 | * and firmware download | |
a0cc2f3b PS |
5 | * Copyright (C) 2009-2010 Texas Instruments |
6 | * Author: Pavan Savoy <pavan_savoy@ti.com> | |
d0088ce1 PS |
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 version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | * | |
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. | |
16 | * | |
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 | |
20 | * | |
21 | */ | |
22 | ||
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> | |
c1afac15 PS |
30 | #include <linux/debugfs.h> |
31 | #include <linux/seq_file.h> | |
d0088ce1 | 32 | #include <linux/sched.h> |
773d6790 | 33 | #include <linux/sysfs.h> |
ec60d0ad | 34 | #include <linux/tty.h> |
d0088ce1 | 35 | |
5c88b021 | 36 | #include <linux/skbuff.h> |
e5558679 | 37 | #include <linux/ti_wilink_st.h> |
eb12a679 | 38 | #include <linux/module.h> |
d0088ce1 | 39 | |
dbd3a870 | 40 | #define MAX_ST_DEVICES 3 /* Imagine 1 on each UART for now */ |
73f12e8d | 41 | static struct platform_device *st_kim_devices[MAX_ST_DEVICES]; |
d0088ce1 PS |
42 | |
43 | /**********************************************************************/ | |
44 | /* internal functions */ | |
45 | ||
dbd3a870 PS |
46 | /** |
47 | * st_get_plat_device - | |
48 | * function which returns the reference to the platform device | |
49 | * requested by id. As of now only 1 such device exists (id=0) | |
50 | * the context requesting for reference can get the id to be | |
51 | * requested by a. The protocol driver which is registering or | |
52 | * b. the tty device which is opened. | |
53 | */ | |
54 | static struct platform_device *st_get_plat_device(int id) | |
55 | { | |
56 | return st_kim_devices[id]; | |
57 | } | |
58 | ||
36b5aee4 PS |
59 | /** |
60 | * validate_firmware_response - | |
61 | * function to return whether the firmware response was proper | |
62 | * in case of error don't complete so that waiting for proper | |
63 | * response times out | |
d0088ce1 | 64 | */ |
27712b39 | 65 | static void validate_firmware_response(struct kim_data_s *kim_gdata) |
d0088ce1 | 66 | { |
38d9df49 | 67 | struct sk_buff *skb = kim_gdata->rx_skb; |
8565adbc PS |
68 | if (!skb) |
69 | return; | |
70 | ||
71 | /* these magic numbers are the position in the response buffer which | |
72 | * allows us to distinguish whether the response is for the read | |
73 | * version info. command | |
74 | */ | |
75 | if (skb->data[2] == 0x01 && skb->data[3] == 0x01 && | |
76 | skb->data[4] == 0x10 && skb->data[5] == 0x00) { | |
77 | /* fw version response */ | |
78 | memcpy(kim_gdata->resp_buffer, | |
79 | kim_gdata->rx_skb->data, | |
80 | kim_gdata->rx_skb->len); | |
8565adbc PS |
81 | kim_gdata->rx_state = ST_W4_PACKET_TYPE; |
82 | kim_gdata->rx_skb = NULL; | |
83 | kim_gdata->rx_count = 0; | |
84 | } else if (unlikely(skb->data[5] != 0)) { | |
d0088ce1 PS |
85 | pr_err("no proper response during fw download"); |
86 | pr_err("data6 %x", skb->data[5]); | |
76ff0e64 | 87 | kfree_skb(skb); |
d0088ce1 PS |
88 | return; /* keep waiting for the proper response */ |
89 | } | |
90 | /* becos of all the script being downloaded */ | |
91 | complete_all(&kim_gdata->kim_rcvd); | |
92 | kfree_skb(skb); | |
93 | } | |
94 | ||
95 | /* check for data len received inside kim_int_recv | |
96 | * most often hit the last case to update state to waiting for data | |
97 | */ | |
38d9df49 | 98 | static inline int kim_check_data_len(struct kim_data_s *kim_gdata, int len) |
d0088ce1 PS |
99 | { |
100 | register int room = skb_tailroom(kim_gdata->rx_skb); | |
101 | ||
e6d9e64e | 102 | pr_debug("len %d room %d", len, room); |
d0088ce1 PS |
103 | |
104 | if (!len) { | |
38d9df49 | 105 | validate_firmware_response(kim_gdata); |
d0088ce1 PS |
106 | } else if (len > room) { |
107 | /* Received packet's payload length is larger. | |
108 | * We can't accommodate it in created skb. | |
109 | */ | |
110 | pr_err("Data length is too large len %d room %d", len, | |
111 | room); | |
112 | kfree_skb(kim_gdata->rx_skb); | |
113 | } else { | |
114 | /* Packet header has non-zero payload length and | |
115 | * we have enough space in created skb. Lets read | |
116 | * payload data */ | |
5c88b021 | 117 | kim_gdata->rx_state = ST_W4_DATA; |
d0088ce1 PS |
118 | kim_gdata->rx_count = len; |
119 | return len; | |
120 | } | |
121 | ||
122 | /* Change ST LL state to continue to process next | |
123 | * packet */ | |
124 | kim_gdata->rx_state = ST_W4_PACKET_TYPE; | |
125 | kim_gdata->rx_skb = NULL; | |
126 | kim_gdata->rx_count = 0; | |
127 | ||
128 | return 0; | |
129 | } | |
130 | ||
36b5aee4 PS |
131 | /** |
132 | * kim_int_recv - receive function called during firmware download | |
133 | * firmware download responses on different UART drivers | |
134 | * have been observed to come in bursts of different | |
135 | * tty_receive and hence the logic | |
d0088ce1 | 136 | */ |
27712b39 | 137 | static void kim_int_recv(struct kim_data_s *kim_gdata, |
38d9df49 | 138 | const unsigned char *data, long count) |
d0088ce1 | 139 | { |
73f12e8d | 140 | const unsigned char *ptr; |
73f12e8d | 141 | int len = 0, type = 0; |
5c88b021 | 142 | unsigned char *plen; |
d0088ce1 | 143 | |
e6d9e64e | 144 | pr_debug("%s", __func__); |
d0088ce1 | 145 | /* Decode received bytes here */ |
73f12e8d | 146 | ptr = data; |
d0088ce1 PS |
147 | if (unlikely(ptr == NULL)) { |
148 | pr_err(" received null from TTY "); | |
149 | return; | |
150 | } | |
73f12e8d | 151 | |
d0088ce1 PS |
152 | while (count) { |
153 | if (kim_gdata->rx_count) { | |
154 | len = min_t(unsigned int, kim_gdata->rx_count, count); | |
155 | memcpy(skb_put(kim_gdata->rx_skb, len), ptr, len); | |
156 | kim_gdata->rx_count -= len; | |
157 | count -= len; | |
158 | ptr += len; | |
159 | ||
160 | if (kim_gdata->rx_count) | |
161 | continue; | |
162 | ||
163 | /* Check ST RX state machine , where are we? */ | |
164 | switch (kim_gdata->rx_state) { | |
165 | /* Waiting for complete packet ? */ | |
5c88b021 | 166 | case ST_W4_DATA: |
e6d9e64e | 167 | pr_debug("Complete pkt received"); |
38d9df49 | 168 | validate_firmware_response(kim_gdata); |
d0088ce1 PS |
169 | kim_gdata->rx_state = ST_W4_PACKET_TYPE; |
170 | kim_gdata->rx_skb = NULL; | |
171 | continue; | |
172 | /* Waiting for Bluetooth event header ? */ | |
5c88b021 PS |
173 | case ST_W4_HEADER: |
174 | plen = | |
175 | (unsigned char *)&kim_gdata->rx_skb->data[1]; | |
176 | pr_debug("event hdr: plen 0x%02x\n", *plen); | |
177 | kim_check_data_len(kim_gdata, *plen); | |
d0088ce1 PS |
178 | continue; |
179 | } /* end of switch */ | |
180 | } /* end of if rx_state */ | |
181 | switch (*ptr) { | |
182 | /* Bluetooth event packet? */ | |
5c88b021 PS |
183 | case 0x04: |
184 | kim_gdata->rx_state = ST_W4_HEADER; | |
185 | kim_gdata->rx_count = 2; | |
186 | type = *ptr; | |
d0088ce1 PS |
187 | break; |
188 | default: | |
189 | pr_info("unknown packet"); | |
190 | ptr++; | |
191 | count--; | |
192 | continue; | |
36b5aee4 | 193 | } |
d0088ce1 PS |
194 | ptr++; |
195 | count--; | |
196 | kim_gdata->rx_skb = | |
5c88b021 | 197 | alloc_skb(1024+8, GFP_ATOMIC); |
d0088ce1 PS |
198 | if (!kim_gdata->rx_skb) { |
199 | pr_err("can't allocate mem for new packet"); | |
200 | kim_gdata->rx_state = ST_W4_PACKET_TYPE; | |
201 | kim_gdata->rx_count = 0; | |
202 | return; | |
36b5aee4 | 203 | } |
5c88b021 PS |
204 | skb_reserve(kim_gdata->rx_skb, 8); |
205 | kim_gdata->rx_skb->cb[0] = 4; | |
206 | kim_gdata->rx_skb->cb[1] = 0; | |
207 | ||
36b5aee4 | 208 | } |
d0088ce1 PS |
209 | return; |
210 | } | |
211 | ||
38d9df49 | 212 | static long read_local_version(struct kim_data_s *kim_gdata, char *bts_scr_name) |
d0088ce1 PS |
213 | { |
214 | unsigned short version = 0, chip = 0, min_ver = 0, maj_ver = 0; | |
73f12e8d | 215 | const char read_ver_cmd[] = { 0x01, 0x01, 0x10, 0x00 }; |
3f46d81a | 216 | long timeout; |
d0088ce1 | 217 | |
e6d9e64e | 218 | pr_debug("%s", __func__); |
d0088ce1 | 219 | |
16735d02 | 220 | reinit_completion(&kim_gdata->kim_rcvd); |
d0088ce1 PS |
221 | if (4 != st_int_write(kim_gdata->core_data, read_ver_cmd, 4)) { |
222 | pr_err("kim: couldn't write 4 bytes"); | |
70442664 | 223 | return -EIO; |
d0088ce1 PS |
224 | } |
225 | ||
3f46d81a NMG |
226 | timeout = wait_for_completion_interruptible_timeout( |
227 | &kim_gdata->kim_rcvd, msecs_to_jiffies(CMD_RESP_TIME)); | |
228 | if (timeout <= 0) { | |
229 | pr_err(" waiting for ver info- timed out or received signal"); | |
230 | return timeout ? -ERESTARTSYS : -ETIMEDOUT; | |
d0088ce1 | 231 | } |
16735d02 | 232 | reinit_completion(&kim_gdata->kim_rcvd); |
8565adbc PS |
233 | /* the positions 12 & 13 in the response buffer provide with the |
234 | * chip, major & minor numbers | |
235 | */ | |
d0088ce1 PS |
236 | |
237 | version = | |
8565adbc PS |
238 | MAKEWORD(kim_gdata->resp_buffer[12], |
239 | kim_gdata->resp_buffer[13]); | |
d0088ce1 PS |
240 | chip = (version & 0x7C00) >> 10; |
241 | min_ver = (version & 0x007F); | |
242 | maj_ver = (version & 0x0380) >> 7; | |
243 | ||
244 | if (version & 0x8000) | |
245 | maj_ver |= 0x0008; | |
246 | ||
4dcc2ab3 EBS |
247 | sprintf(bts_scr_name, "ti-connectivity/TIInit_%d.%d.%d.bts", |
248 | chip, maj_ver, min_ver); | |
e2a53282 NJ |
249 | |
250 | /* to be accessed later via sysfs entry */ | |
251 | kim_gdata->version.full = version; | |
252 | kim_gdata->version.chip = chip; | |
253 | kim_gdata->version.maj_ver = maj_ver; | |
254 | kim_gdata->version.min_ver = min_ver; | |
255 | ||
d0088ce1 | 256 | pr_info("%s", bts_scr_name); |
320920cb | 257 | return 0; |
d0088ce1 PS |
258 | } |
259 | ||
27712b39 | 260 | static void skip_change_remote_baud(unsigned char **ptr, long *len) |
ef04d121 PS |
261 | { |
262 | unsigned char *nxt_action, *cur_action; | |
263 | cur_action = *ptr; | |
264 | ||
265 | nxt_action = cur_action + sizeof(struct bts_action) + | |
266 | ((struct bts_action *) cur_action)->size; | |
267 | ||
268 | if (((struct bts_action *) nxt_action)->type != ACTION_WAIT_EVENT) { | |
269 | pr_err("invalid action after change remote baud command"); | |
270 | } else { | |
271 | *ptr = *ptr + sizeof(struct bts_action) + | |
9d031d94 | 272 | ((struct bts_action *)cur_action)->size; |
ef04d121 | 273 | *len = *len - (sizeof(struct bts_action) + |
9d031d94 | 274 | ((struct bts_action *)cur_action)->size); |
ef04d121 PS |
275 | /* warn user on not commenting these in firmware */ |
276 | pr_warn("skipping the wait event of change remote baud"); | |
277 | } | |
278 | } | |
279 | ||
36b5aee4 PS |
280 | /** |
281 | * download_firmware - | |
282 | * internal function which parses through the .bts firmware | |
283 | * script file intreprets SEND, DELAY actions only as of now | |
d0088ce1 | 284 | */ |
38d9df49 | 285 | static long download_firmware(struct kim_data_s *kim_gdata) |
d0088ce1 | 286 | { |
320920cb | 287 | long err = 0; |
d0088ce1 | 288 | long len = 0; |
73f12e8d PS |
289 | unsigned char *ptr = NULL; |
290 | unsigned char *action_ptr = NULL; | |
4dcc2ab3 | 291 | unsigned char bts_scr_name[40] = { 0 }; /* 40 char long bts scr name? */ |
ef04d121 PS |
292 | int wr_room_space; |
293 | int cmd_size; | |
294 | unsigned long timeout; | |
d0088ce1 | 295 | |
38d9df49 | 296 | err = read_local_version(kim_gdata, bts_scr_name); |
320920cb | 297 | if (err != 0) { |
d0088ce1 PS |
298 | pr_err("kim: failed to read local ver"); |
299 | return err; | |
300 | } | |
301 | err = | |
302 | request_firmware(&kim_gdata->fw_entry, bts_scr_name, | |
303 | &kim_gdata->kim_pdev->dev); | |
304 | if (unlikely((err != 0) || (kim_gdata->fw_entry->data == NULL) || | |
305 | (kim_gdata->fw_entry->size == 0))) { | |
306 | pr_err(" request_firmware failed(errno %ld) for %s", err, | |
307 | bts_scr_name); | |
70442664 | 308 | return -EINVAL; |
d0088ce1 PS |
309 | } |
310 | ptr = (void *)kim_gdata->fw_entry->data; | |
311 | len = kim_gdata->fw_entry->size; | |
312 | /* bts_header to remove out magic number and | |
313 | * version | |
314 | */ | |
315 | ptr += sizeof(struct bts_header); | |
316 | len -= sizeof(struct bts_header); | |
317 | ||
318 | while (len > 0 && ptr) { | |
e6d9e64e | 319 | pr_debug(" action size %d, type %d ", |
d0088ce1 PS |
320 | ((struct bts_action *)ptr)->size, |
321 | ((struct bts_action *)ptr)->type); | |
322 | ||
323 | switch (((struct bts_action *)ptr)->type) { | |
324 | case ACTION_SEND_COMMAND: /* action send */ | |
2f81a02c | 325 | pr_debug("S"); |
d0088ce1 PS |
326 | action_ptr = &(((struct bts_action *)ptr)->data[0]); |
327 | if (unlikely | |
328 | (((struct hci_command *)action_ptr)->opcode == | |
329 | 0xFF36)) { | |
330 | /* ignore remote change | |
331 | * baud rate HCI VS command */ | |
ef04d121 | 332 | pr_warn("change remote baud" |
e6d9e64e | 333 | " rate command in firmware"); |
ef04d121 | 334 | skip_change_remote_baud(&ptr, &len); |
d0088ce1 PS |
335 | break; |
336 | } | |
ef04d121 PS |
337 | /* |
338 | * Make sure we have enough free space in uart | |
339 | * tx buffer to write current firmware command | |
340 | */ | |
341 | cmd_size = ((struct bts_action *)ptr)->size; | |
342 | timeout = jiffies + msecs_to_jiffies(CMD_WR_TIME); | |
343 | do { | |
344 | wr_room_space = | |
345 | st_get_uart_wr_room(kim_gdata->core_data); | |
346 | if (wr_room_space < 0) { | |
347 | pr_err("Unable to get free " | |
348 | "space info from uart tx buffer"); | |
349 | release_firmware(kim_gdata->fw_entry); | |
350 | return wr_room_space; | |
351 | } | |
352 | mdelay(1); /* wait 1ms before checking room */ | |
353 | } while ((wr_room_space < cmd_size) && | |
354 | time_before(jiffies, timeout)); | |
355 | ||
356 | /* Timeout happened ? */ | |
357 | if (time_after_eq(jiffies, timeout)) { | |
358 | pr_err("Timeout while waiting for free " | |
359 | "free space in uart tx buffer"); | |
360 | release_firmware(kim_gdata->fw_entry); | |
361 | return -ETIMEDOUT; | |
362 | } | |
2f81a02c PS |
363 | /* reinit completion before sending for the |
364 | * relevant wait | |
365 | */ | |
16735d02 | 366 | reinit_completion(&kim_gdata->kim_rcvd); |
d0088ce1 | 367 | |
ef04d121 PS |
368 | /* |
369 | * Free space found in uart buffer, call st_int_write | |
370 | * to send current firmware command to the uart tx | |
371 | * buffer. | |
372 | */ | |
d0088ce1 PS |
373 | err = st_int_write(kim_gdata->core_data, |
374 | ((struct bts_action_send *)action_ptr)->data, | |
375 | ((struct bts_action *)ptr)->size); | |
376 | if (unlikely(err < 0)) { | |
377 | release_firmware(kim_gdata->fw_entry); | |
70442664 | 378 | return err; |
d0088ce1 | 379 | } |
ef04d121 PS |
380 | /* |
381 | * Check number of bytes written to the uart tx buffer | |
382 | * and requested command write size | |
383 | */ | |
384 | if (err != cmd_size) { | |
385 | pr_err("Number of bytes written to uart " | |
386 | "tx buffer are not matching with " | |
387 | "requested cmd write size"); | |
388 | release_firmware(kim_gdata->fw_entry); | |
389 | return -EIO; | |
390 | } | |
391 | break; | |
392 | case ACTION_WAIT_EVENT: /* wait */ | |
2f81a02c | 393 | pr_debug("W"); |
3f46d81a | 394 | err = wait_for_completion_interruptible_timeout( |
53702358 | 395 | &kim_gdata->kim_rcvd, |
3f46d81a NMG |
396 | msecs_to_jiffies(CMD_RESP_TIME)); |
397 | if (err <= 0) { | |
398 | pr_err("response timeout/signaled during fw download "); | |
d0088ce1 PS |
399 | /* timed out */ |
400 | release_firmware(kim_gdata->fw_entry); | |
3f46d81a | 401 | return err ? -ERESTARTSYS : -ETIMEDOUT; |
d0088ce1 | 402 | } |
16735d02 | 403 | reinit_completion(&kim_gdata->kim_rcvd); |
d0088ce1 PS |
404 | break; |
405 | case ACTION_DELAY: /* sleep */ | |
406 | pr_info("sleep command in scr"); | |
407 | action_ptr = &(((struct bts_action *)ptr)->data[0]); | |
408 | mdelay(((struct bts_action_delay *)action_ptr)->msec); | |
409 | break; | |
410 | } | |
411 | len = | |
412 | len - (sizeof(struct bts_action) + | |
413 | ((struct bts_action *)ptr)->size); | |
414 | ptr = | |
415 | ptr + sizeof(struct bts_action) + | |
416 | ((struct bts_action *)ptr)->size; | |
417 | } | |
418 | /* fw download complete */ | |
419 | release_firmware(kim_gdata->fw_entry); | |
320920cb | 420 | return 0; |
d0088ce1 PS |
421 | } |
422 | ||
423 | /**********************************************************************/ | |
424 | /* functions called from ST core */ | |
d0088ce1 PS |
425 | /* called from ST Core, when REG_IN_PROGRESS (registration in progress) |
426 | * can be because of | |
427 | * 1. response to read local version | |
428 | * 2. during send/recv's of firmware download | |
429 | */ | |
430 | void st_kim_recv(void *disc_data, const unsigned char *data, long count) | |
431 | { | |
38d9df49 PS |
432 | struct st_data_s *st_gdata = (struct st_data_s *)disc_data; |
433 | struct kim_data_s *kim_gdata = st_gdata->kim_data; | |
434 | ||
8565adbc PS |
435 | /* proceed to gather all data and distinguish read fw version response |
436 | * from other fw responses when data gathering is complete | |
437 | */ | |
438 | kim_int_recv(kim_gdata, data, count); | |
d0088ce1 PS |
439 | return; |
440 | } | |
441 | ||
442 | /* to signal completion of line discipline installation | |
443 | * called from ST Core, upon tty_open | |
444 | */ | |
38d9df49 | 445 | void st_kim_complete(void *kim_data) |
d0088ce1 | 446 | { |
38d9df49 | 447 | struct kim_data_s *kim_gdata = (struct kim_data_s *)kim_data; |
d0088ce1 PS |
448 | complete(&kim_gdata->ldisc_installed); |
449 | } | |
450 | ||
36b5aee4 PS |
451 | /** |
452 | * st_kim_start - called from ST Core upon 1st registration | |
453 | * This involves toggling the chip enable gpio, reading | |
454 | * the firmware version from chip, forming the fw file name | |
455 | * based on the chip version, requesting the fw, parsing it | |
456 | * and perform download(send/recv). | |
457 | */ | |
38d9df49 | 458 | long st_kim_start(void *kim_data) |
d0088ce1 | 459 | { |
320920cb | 460 | long err = 0; |
d0088ce1 | 461 | long retry = POR_RETRY_COUNT; |
0d7c5f25 | 462 | struct ti_st_plat_data *pdata; |
38d9df49 PS |
463 | struct kim_data_s *kim_gdata = (struct kim_data_s *)kim_data; |
464 | ||
d0088ce1 | 465 | pr_info(" %s", __func__); |
c0bd1b9e | 466 | pdata = kim_gdata->kim_pdev->dev.platform_data; |
d0088ce1 PS |
467 | |
468 | do { | |
0d7c5f25 PS |
469 | /* platform specific enabling code here */ |
470 | if (pdata->chip_enable) | |
471 | pdata->chip_enable(kim_gdata); | |
472 | ||
a7e2ca17 | 473 | /* Configure BT nShutdown to HIGH state */ |
513da46d | 474 | gpio_set_value_cansleep(kim_gdata->nshutdown, GPIO_LOW); |
a7e2ca17 | 475 | mdelay(5); /* FIXME: a proper toggle */ |
513da46d | 476 | gpio_set_value_cansleep(kim_gdata->nshutdown, GPIO_HIGH); |
a7e2ca17 | 477 | mdelay(100); |
d0088ce1 | 478 | /* re-initialize the completion */ |
16735d02 | 479 | reinit_completion(&kim_gdata->ldisc_installed); |
ec60d0ad PS |
480 | /* send notification to UIM */ |
481 | kim_gdata->ldisc_install = 1; | |
482 | pr_info("ldisc_install = 1"); | |
483 | sysfs_notify(&kim_gdata->kim_pdev->dev.kobj, | |
484 | NULL, "install"); | |
d0088ce1 | 485 | /* wait for ldisc to be installed */ |
53702358 PS |
486 | err = wait_for_completion_interruptible_timeout( |
487 | &kim_gdata->ldisc_installed, msecs_to_jiffies(LDISC_TIME)); | |
18ccecf9 PS |
488 | if (!err) { |
489 | /* ldisc installation timeout, | |
490 | * flush uart, power cycle BT_EN */ | |
491 | pr_err("ldisc installation timeout"); | |
492 | err = st_kim_stop(kim_gdata); | |
d0088ce1 PS |
493 | continue; |
494 | } else { | |
495 | /* ldisc installed now */ | |
18ccecf9 | 496 | pr_info("line discipline installed"); |
38d9df49 | 497 | err = download_firmware(kim_gdata); |
320920cb | 498 | if (err != 0) { |
18ccecf9 PS |
499 | /* ldisc installed but fw download failed, |
500 | * flush uart & power cycle BT_EN */ | |
d0088ce1 | 501 | pr_err("download firmware failed"); |
18ccecf9 | 502 | err = st_kim_stop(kim_gdata); |
d0088ce1 PS |
503 | continue; |
504 | } else { /* on success don't retry */ | |
505 | break; | |
506 | } | |
507 | } | |
508 | } while (retry--); | |
509 | return err; | |
510 | } | |
511 | ||
36b5aee4 | 512 | /** |
18ccecf9 PS |
513 | * st_kim_stop - stop communication with chip. |
514 | * This can be called from ST Core/KIM, on the- | |
515 | * (a) last un-register when chip need not be powered there-after, | |
516 | * (b) upon failure to either install ldisc or download firmware. | |
517 | * The function is responsible to (a) notify UIM about un-installation, | |
518 | * (b) flush UART if the ldisc was installed. | |
a7e2ca17 LC |
519 | * (c) reset BT_EN - pull down nshutdown at the end. |
520 | * (d) invoke platform's chip disabling routine. | |
36b5aee4 | 521 | */ |
38d9df49 | 522 | long st_kim_stop(void *kim_data) |
d0088ce1 | 523 | { |
320920cb | 524 | long err = 0; |
38d9df49 | 525 | struct kim_data_s *kim_gdata = (struct kim_data_s *)kim_data; |
c0bd1b9e RH |
526 | struct ti_st_plat_data *pdata = |
527 | kim_gdata->kim_pdev->dev.platform_data; | |
18ccecf9 | 528 | struct tty_struct *tty = kim_gdata->core_data->tty; |
d0088ce1 | 529 | |
16735d02 | 530 | reinit_completion(&kim_gdata->ldisc_installed); |
ec60d0ad | 531 | |
18ccecf9 PS |
532 | if (tty) { /* can be called before ldisc is installed */ |
533 | /* Flush any pending characters in the driver and discipline. */ | |
534 | tty_ldisc_flush(tty); | |
535 | tty_driver_flush_buffer(tty); | |
18ccecf9 | 536 | } |
ec60d0ad PS |
537 | |
538 | /* send uninstall notification to UIM */ | |
539 | pr_info("ldisc_install = 0"); | |
540 | kim_gdata->ldisc_install = 0; | |
541 | sysfs_notify(&kim_gdata->kim_pdev->dev.kobj, NULL, "install"); | |
d0088ce1 PS |
542 | |
543 | /* wait for ldisc to be un-installed */ | |
53702358 PS |
544 | err = wait_for_completion_interruptible_timeout( |
545 | &kim_gdata->ldisc_installed, msecs_to_jiffies(LDISC_TIME)); | |
d0088ce1 PS |
546 | if (!err) { /* timeout */ |
547 | pr_err(" timed out waiting for ldisc to be un-installed"); | |
b64365a5 | 548 | err = -ETIMEDOUT; |
d0088ce1 PS |
549 | } |
550 | ||
a7e2ca17 | 551 | /* By default configure BT nShutdown to LOW state */ |
513da46d | 552 | gpio_set_value_cansleep(kim_gdata->nshutdown, GPIO_LOW); |
a7e2ca17 | 553 | mdelay(1); |
513da46d | 554 | gpio_set_value_cansleep(kim_gdata->nshutdown, GPIO_HIGH); |
a7e2ca17 | 555 | mdelay(1); |
513da46d | 556 | gpio_set_value_cansleep(kim_gdata->nshutdown, GPIO_LOW); |
a7e2ca17 | 557 | |
0d7c5f25 PS |
558 | /* platform specific disable */ |
559 | if (pdata->chip_disable) | |
560 | pdata->chip_disable(kim_gdata); | |
d0088ce1 PS |
561 | return err; |
562 | } | |
563 | ||
564 | /**********************************************************************/ | |
565 | /* functions called from subsystems */ | |
c1afac15 | 566 | /* called when debugfs entry is read from */ |
e2a53282 | 567 | |
c1afac15 | 568 | static int show_version(struct seq_file *s, void *unused) |
e2a53282 | 569 | { |
c1afac15 PS |
570 | struct kim_data_s *kim_gdata = (struct kim_data_s *)s->private; |
571 | seq_printf(s, "%04X %d.%d.%d\n", kim_gdata->version.full, | |
e2a53282 NJ |
572 | kim_gdata->version.chip, kim_gdata->version.maj_ver, |
573 | kim_gdata->version.min_ver); | |
c1afac15 | 574 | return 0; |
d0088ce1 PS |
575 | } |
576 | ||
c1afac15 | 577 | static int show_list(struct seq_file *s, void *unused) |
d0088ce1 | 578 | { |
c1afac15 PS |
579 | struct kim_data_s *kim_gdata = (struct kim_data_s *)s->private; |
580 | kim_st_list_protocols(kim_gdata->core_data, s); | |
581 | return 0; | |
d0088ce1 PS |
582 | } |
583 | ||
ec60d0ad PS |
584 | static ssize_t show_install(struct device *dev, |
585 | struct device_attribute *attr, char *buf) | |
d0088ce1 | 586 | { |
ec60d0ad PS |
587 | struct kim_data_s *kim_data = dev_get_drvdata(dev); |
588 | return sprintf(buf, "%d\n", kim_data->ldisc_install); | |
589 | } | |
d0088ce1 | 590 | |
933aae54 PS |
591 | #ifdef DEBUG |
592 | static ssize_t store_dev_name(struct device *dev, | |
593 | struct device_attribute *attr, const char *buf, size_t count) | |
594 | { | |
595 | struct kim_data_s *kim_data = dev_get_drvdata(dev); | |
596 | pr_debug("storing dev name >%s<", buf); | |
597 | strncpy(kim_data->dev_name, buf, count); | |
598 | pr_debug("stored dev name >%s<", kim_data->dev_name); | |
599 | return count; | |
600 | } | |
601 | ||
602 | static ssize_t store_baud_rate(struct device *dev, | |
603 | struct device_attribute *attr, const char *buf, size_t count) | |
604 | { | |
605 | struct kim_data_s *kim_data = dev_get_drvdata(dev); | |
606 | pr_debug("storing baud rate >%s<", buf); | |
607 | sscanf(buf, "%ld", &kim_data->baud_rate); | |
608 | pr_debug("stored baud rate >%ld<", kim_data->baud_rate); | |
609 | return count; | |
610 | } | |
611 | #endif /* if DEBUG */ | |
612 | ||
ec60d0ad PS |
613 | static ssize_t show_dev_name(struct device *dev, |
614 | struct device_attribute *attr, char *buf) | |
615 | { | |
616 | struct kim_data_s *kim_data = dev_get_drvdata(dev); | |
617 | return sprintf(buf, "%s\n", kim_data->dev_name); | |
618 | } | |
619 | ||
620 | static ssize_t show_baud_rate(struct device *dev, | |
621 | struct device_attribute *attr, char *buf) | |
622 | { | |
623 | struct kim_data_s *kim_data = dev_get_drvdata(dev); | |
63e144c9 | 624 | return sprintf(buf, "%d\n", kim_data->baud_rate); |
ec60d0ad PS |
625 | } |
626 | ||
627 | static ssize_t show_flow_cntrl(struct device *dev, | |
628 | struct device_attribute *attr, char *buf) | |
629 | { | |
630 | struct kim_data_s *kim_data = dev_get_drvdata(dev); | |
631 | return sprintf(buf, "%d\n", kim_data->flow_cntrl); | |
d0088ce1 PS |
632 | } |
633 | ||
ec60d0ad PS |
634 | /* structures specific for sysfs entries */ |
635 | static struct kobj_attribute ldisc_install = | |
636 | __ATTR(install, 0444, (void *)show_install, NULL); | |
637 | ||
638 | static struct kobj_attribute uart_dev_name = | |
933aae54 PS |
639 | #ifdef DEBUG /* TODO: move this to debug-fs if possible */ |
640 | __ATTR(dev_name, 0644, (void *)show_dev_name, (void *)store_dev_name); | |
641 | #else | |
ec60d0ad | 642 | __ATTR(dev_name, 0444, (void *)show_dev_name, NULL); |
933aae54 | 643 | #endif |
ec60d0ad PS |
644 | |
645 | static struct kobj_attribute uart_baud_rate = | |
933aae54 PS |
646 | #ifdef DEBUG /* TODO: move to debugfs */ |
647 | __ATTR(baud_rate, 0644, (void *)show_baud_rate, (void *)store_baud_rate); | |
648 | #else | |
ec60d0ad | 649 | __ATTR(baud_rate, 0444, (void *)show_baud_rate, NULL); |
933aae54 | 650 | #endif |
ec60d0ad PS |
651 | |
652 | static struct kobj_attribute uart_flow_cntrl = | |
653 | __ATTR(flow_cntrl, 0444, (void *)show_flow_cntrl, NULL); | |
654 | ||
655 | static struct attribute *uim_attrs[] = { | |
656 | &ldisc_install.attr, | |
657 | &uart_dev_name.attr, | |
658 | &uart_baud_rate.attr, | |
659 | &uart_flow_cntrl.attr, | |
660 | NULL, | |
661 | }; | |
662 | ||
663 | static struct attribute_group uim_attr_grp = { | |
664 | .attrs = uim_attrs, | |
665 | }; | |
666 | ||
36b5aee4 PS |
667 | /** |
668 | * st_kim_ref - reference the core's data | |
669 | * This references the per-ST platform device in the arch/xx/ | |
670 | * board-xx.c file. | |
671 | * This would enable multiple such platform devices to exist | |
672 | * on a given platform | |
673 | */ | |
dbd3a870 | 674 | void st_kim_ref(struct st_data_s **core_data, int id) |
d0088ce1 | 675 | { |
38d9df49 PS |
676 | struct platform_device *pdev; |
677 | struct kim_data_s *kim_gdata; | |
678 | /* get kim_gdata reference from platform device */ | |
dbd3a870 | 679 | pdev = st_get_plat_device(id); |
868eba8e GJ |
680 | if (!pdev) |
681 | goto err; | |
9093ca88 | 682 | kim_gdata = platform_get_drvdata(pdev); |
868eba8e GJ |
683 | if (!kim_gdata) |
684 | goto err; | |
685 | ||
d0088ce1 | 686 | *core_data = kim_gdata->core_data; |
868eba8e GJ |
687 | return; |
688 | err: | |
689 | *core_data = NULL; | |
d0088ce1 PS |
690 | } |
691 | ||
c1afac15 PS |
692 | static int kim_version_open(struct inode *i, struct file *f) |
693 | { | |
694 | return single_open(f, show_version, i->i_private); | |
695 | } | |
696 | ||
697 | static int kim_list_open(struct inode *i, struct file *f) | |
698 | { | |
699 | return single_open(f, show_list, i->i_private); | |
700 | } | |
701 | ||
702 | static const struct file_operations version_debugfs_fops = { | |
703 | /* version info */ | |
704 | .open = kim_version_open, | |
705 | .read = seq_read, | |
706 | .llseek = seq_lseek, | |
707 | .release = single_release, | |
708 | }; | |
709 | static const struct file_operations list_debugfs_fops = { | |
710 | /* protocols info */ | |
711 | .open = kim_list_open, | |
712 | .read = seq_read, | |
713 | .llseek = seq_lseek, | |
714 | .release = single_release, | |
715 | }; | |
716 | ||
d0088ce1 PS |
717 | /**********************************************************************/ |
718 | /* functions called from platform device driver subsystem | |
719 | * need to have a relevant platform device entry in the platform's | |
720 | * board-*.c file | |
721 | */ | |
722 | ||
27712b39 | 723 | static struct dentry *kim_debugfs_dir; |
d0088ce1 PS |
724 | static int kim_probe(struct platform_device *pdev) |
725 | { | |
38d9df49 | 726 | struct kim_data_s *kim_gdata; |
c0bd1b9e | 727 | struct ti_st_plat_data *pdata = pdev->dev.platform_data; |
b2997387 | 728 | int err; |
38d9df49 | 729 | |
dfb7ef7d PS |
730 | if ((pdev->id != -1) && (pdev->id < MAX_ST_DEVICES)) { |
731 | /* multiple devices could exist */ | |
732 | st_kim_devices[pdev->id] = pdev; | |
733 | } else { | |
25985edc | 734 | /* platform's sure about existence of 1 device */ |
dfb7ef7d PS |
735 | st_kim_devices[0] = pdev; |
736 | } | |
737 | ||
38d9df49 PS |
738 | kim_gdata = kzalloc(sizeof(struct kim_data_s), GFP_ATOMIC); |
739 | if (!kim_gdata) { | |
740 | pr_err("no mem to allocate"); | |
741 | return -ENOMEM; | |
742 | } | |
9093ca88 | 743 | platform_set_drvdata(pdev, kim_gdata); |
d0088ce1 | 744 | |
b2997387 MK |
745 | err = st_core_init(&kim_gdata->core_data); |
746 | if (err != 0) { | |
d0088ce1 | 747 | pr_err(" ST core init failed"); |
b2997387 MK |
748 | err = -EIO; |
749 | goto err_core_init; | |
d0088ce1 | 750 | } |
38d9df49 PS |
751 | /* refer to itself */ |
752 | kim_gdata->core_data->kim_data = kim_gdata; | |
d0088ce1 | 753 | |
a7e2ca17 LC |
754 | /* Claim the chip enable nShutdown gpio from the system */ |
755 | kim_gdata->nshutdown = pdata->nshutdown_gpio; | |
756 | err = gpio_request(kim_gdata->nshutdown, "kim"); | |
757 | if (unlikely(err)) { | |
63e144c9 | 758 | pr_err(" gpio %d request failed ", kim_gdata->nshutdown); |
a7e2ca17 LC |
759 | return err; |
760 | } | |
761 | ||
762 | /* Configure nShutdown GPIO as output=0 */ | |
763 | err = gpio_direction_output(kim_gdata->nshutdown, 0); | |
764 | if (unlikely(err)) { | |
63e144c9 | 765 | pr_err(" unable to configure gpio %d", kim_gdata->nshutdown); |
a7e2ca17 LC |
766 | return err; |
767 | } | |
d0088ce1 PS |
768 | /* get reference of pdev for request_firmware |
769 | */ | |
770 | kim_gdata->kim_pdev = pdev; | |
771 | init_completion(&kim_gdata->kim_rcvd); | |
772 | init_completion(&kim_gdata->ldisc_installed); | |
b38fc2d9 | 773 | |
b2997387 MK |
774 | err = sysfs_create_group(&pdev->dev.kobj, &uim_attr_grp); |
775 | if (err) { | |
ec60d0ad | 776 | pr_err("failed to create sysfs entries"); |
b2997387 | 777 | goto err_sysfs_group; |
d0088ce1 | 778 | } |
e2a53282 | 779 | |
ec60d0ad PS |
780 | /* copying platform data */ |
781 | strncpy(kim_gdata->dev_name, pdata->dev_name, UART_DEV_NAME_LEN); | |
782 | kim_gdata->flow_cntrl = pdata->flow_cntrl; | |
783 | kim_gdata->baud_rate = pdata->baud_rate; | |
784 | pr_info("sysfs entries created\n"); | |
785 | ||
c1afac15 | 786 | kim_debugfs_dir = debugfs_create_dir("ti-st", NULL); |
3768528a | 787 | if (!kim_debugfs_dir) { |
c1afac15 | 788 | pr_err(" debugfs entries creation failed "); |
c6ec0fb4 | 789 | return 0; |
e2a53282 | 790 | } |
c1afac15 PS |
791 | |
792 | debugfs_create_file("version", S_IRUGO, kim_debugfs_dir, | |
793 | kim_gdata, &version_debugfs_fops); | |
794 | debugfs_create_file("protocols", S_IRUGO, kim_debugfs_dir, | |
795 | kim_gdata, &list_debugfs_fops); | |
320920cb | 796 | return 0; |
b2997387 | 797 | |
b2997387 MK |
798 | err_sysfs_group: |
799 | st_core_exit(kim_gdata->core_data); | |
800 | ||
801 | err_core_init: | |
802 | kfree(kim_gdata); | |
803 | ||
804 | return err; | |
d0088ce1 PS |
805 | } |
806 | ||
807 | static int kim_remove(struct platform_device *pdev) | |
808 | { | |
a7e2ca17 | 809 | /* free the GPIOs requested */ |
c0bd1b9e | 810 | struct ti_st_plat_data *pdata = pdev->dev.platform_data; |
38d9df49 PS |
811 | struct kim_data_s *kim_gdata; |
812 | ||
9093ca88 | 813 | kim_gdata = platform_get_drvdata(pdev); |
d0088ce1 | 814 | |
a7e2ca17 LC |
815 | /* Free the Bluetooth/FM/GPIO |
816 | * nShutdown gpio from the system | |
817 | */ | |
818 | gpio_free(pdata->nshutdown_gpio); | |
819 | pr_info("nshutdown GPIO Freed"); | |
820 | ||
781a7395 | 821 | debugfs_remove_recursive(kim_debugfs_dir); |
ec60d0ad | 822 | sysfs_remove_group(&pdev->dev.kobj, &uim_attr_grp); |
781a7395 PS |
823 | pr_info("sysfs entries removed"); |
824 | ||
d0088ce1 PS |
825 | kim_gdata->kim_pdev = NULL; |
826 | st_core_exit(kim_gdata->core_data); | |
38d9df49 PS |
827 | |
828 | kfree(kim_gdata); | |
829 | kim_gdata = NULL; | |
320920cb | 830 | return 0; |
d0088ce1 PS |
831 | } |
832 | ||
27712b39 | 833 | static int kim_suspend(struct platform_device *pdev, pm_message_t state) |
ec60d0ad | 834 | { |
c0bd1b9e | 835 | struct ti_st_plat_data *pdata = pdev->dev.platform_data; |
ec60d0ad PS |
836 | |
837 | if (pdata->suspend) | |
838 | return pdata->suspend(pdev, state); | |
839 | ||
4b4aa3ab | 840 | return 0; |
ec60d0ad PS |
841 | } |
842 | ||
27712b39 | 843 | static int kim_resume(struct platform_device *pdev) |
ec60d0ad | 844 | { |
c0bd1b9e | 845 | struct ti_st_plat_data *pdata = pdev->dev.platform_data; |
ec60d0ad PS |
846 | |
847 | if (pdata->resume) | |
848 | return pdata->resume(pdev); | |
849 | ||
4b4aa3ab | 850 | return 0; |
ec60d0ad PS |
851 | } |
852 | ||
d0088ce1 PS |
853 | /**********************************************************************/ |
854 | /* entry point for ST KIM module, called in from ST Core */ | |
ec60d0ad PS |
855 | static struct platform_driver kim_platform_driver = { |
856 | .probe = kim_probe, | |
857 | .remove = kim_remove, | |
858 | .suspend = kim_suspend, | |
859 | .resume = kim_resume, | |
860 | .driver = { | |
861 | .name = "kim", | |
ec60d0ad PS |
862 | }, |
863 | }; | |
d0088ce1 | 864 | |
b00e126f | 865 | module_platform_driver(kim_platform_driver); |
d0088ce1 | 866 | |
d0088ce1 PS |
867 | MODULE_AUTHOR("Pavan Savoy <pavan_savoy@ti.com>"); |
868 | MODULE_DESCRIPTION("Shared Transport Driver for TI BT/FM/GPS combo chips "); | |
869 | MODULE_LICENSE("GPL"); |