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> |
83ef41f0 | 39 | |
d0088ce1 | 40 | |
dbd3a870 | 41 | #define MAX_ST_DEVICES 3 /* Imagine 1 on each UART for now */ |
73f12e8d | 42 | static struct platform_device *st_kim_devices[MAX_ST_DEVICES]; |
d0088ce1 PS |
43 | |
44 | /**********************************************************************/ | |
45 | /* internal functions */ | |
46 | ||
dbd3a870 PS |
47 | /** |
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. | |
54 | */ | |
55 | static struct platform_device *st_get_plat_device(int id) | |
56 | { | |
57 | return st_kim_devices[id]; | |
58 | } | |
59 | ||
36b5aee4 PS |
60 | /** |
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 | |
64 | * response times out | |
d0088ce1 | 65 | */ |
27712b39 | 66 | static void validate_firmware_response(struct kim_data_s *kim_gdata) |
d0088ce1 | 67 | { |
38d9df49 | 68 | struct sk_buff *skb = kim_gdata->rx_skb; |
8565adbc PS |
69 | if (!skb) |
70 | return; | |
71 | ||
72 | /* these magic numbers are the position in the response buffer which | |
73 | * allows us to distinguish whether the response is for the read | |
74 | * version info. command | |
75 | */ | |
76 | if (skb->data[2] == 0x01 && skb->data[3] == 0x01 && | |
77 | skb->data[4] == 0x10 && skb->data[5] == 0x00) { | |
78 | /* fw version response */ | |
79 | memcpy(kim_gdata->resp_buffer, | |
80 | kim_gdata->rx_skb->data, | |
81 | kim_gdata->rx_skb->len); | |
82 | complete_all(&kim_gdata->kim_rcvd); | |
83 | kim_gdata->rx_state = ST_W4_PACKET_TYPE; | |
84 | kim_gdata->rx_skb = NULL; | |
85 | kim_gdata->rx_count = 0; | |
86 | } else if (unlikely(skb->data[5] != 0)) { | |
d0088ce1 PS |
87 | pr_err("no proper response during fw download"); |
88 | pr_err("data6 %x", skb->data[5]); | |
76ff0e64 | 89 | kfree_skb(skb); |
d0088ce1 PS |
90 | return; /* keep waiting for the proper response */ |
91 | } | |
92 | /* becos of all the script being downloaded */ | |
93 | complete_all(&kim_gdata->kim_rcvd); | |
94 | kfree_skb(skb); | |
95 | } | |
96 | ||
97 | /* check for data len received inside kim_int_recv | |
98 | * most often hit the last case to update state to waiting for data | |
99 | */ | |
38d9df49 | 100 | static inline int kim_check_data_len(struct kim_data_s *kim_gdata, int len) |
d0088ce1 PS |
101 | { |
102 | register int room = skb_tailroom(kim_gdata->rx_skb); | |
103 | ||
e6d9e64e | 104 | pr_debug("len %d room %d", len, room); |
d0088ce1 PS |
105 | |
106 | if (!len) { | |
38d9df49 | 107 | validate_firmware_response(kim_gdata); |
d0088ce1 PS |
108 | } else if (len > room) { |
109 | /* Received packet's payload length is larger. | |
110 | * We can't accommodate it in created skb. | |
111 | */ | |
112 | pr_err("Data length is too large len %d room %d", len, | |
113 | room); | |
114 | kfree_skb(kim_gdata->rx_skb); | |
115 | } else { | |
116 | /* Packet header has non-zero payload length and | |
117 | * we have enough space in created skb. Lets read | |
118 | * payload data */ | |
5c88b021 | 119 | kim_gdata->rx_state = ST_W4_DATA; |
d0088ce1 PS |
120 | kim_gdata->rx_count = len; |
121 | return len; | |
122 | } | |
123 | ||
124 | /* Change ST LL state to continue to process next | |
125 | * packet */ | |
126 | kim_gdata->rx_state = ST_W4_PACKET_TYPE; | |
127 | kim_gdata->rx_skb = NULL; | |
128 | kim_gdata->rx_count = 0; | |
129 | ||
130 | return 0; | |
131 | } | |
132 | ||
36b5aee4 PS |
133 | /** |
134 | * kim_int_recv - receive function called during firmware download | |
135 | * firmware download responses on different UART drivers | |
136 | * have been observed to come in bursts of different | |
137 | * tty_receive and hence the logic | |
d0088ce1 | 138 | */ |
27712b39 | 139 | static void kim_int_recv(struct kim_data_s *kim_gdata, |
38d9df49 | 140 | const unsigned char *data, long count) |
d0088ce1 | 141 | { |
73f12e8d | 142 | const unsigned char *ptr; |
73f12e8d | 143 | int len = 0, type = 0; |
5c88b021 | 144 | unsigned char *plen; |
d0088ce1 | 145 | |
e6d9e64e | 146 | pr_debug("%s", __func__); |
d0088ce1 | 147 | /* Decode received bytes here */ |
73f12e8d | 148 | ptr = data; |
d0088ce1 PS |
149 | if (unlikely(ptr == NULL)) { |
150 | pr_err(" received null from TTY "); | |
151 | return; | |
152 | } | |
73f12e8d | 153 | |
d0088ce1 PS |
154 | while (count) { |
155 | if (kim_gdata->rx_count) { | |
156 | len = min_t(unsigned int, kim_gdata->rx_count, count); | |
157 | memcpy(skb_put(kim_gdata->rx_skb, len), ptr, len); | |
158 | kim_gdata->rx_count -= len; | |
159 | count -= len; | |
160 | ptr += len; | |
161 | ||
162 | if (kim_gdata->rx_count) | |
163 | continue; | |
164 | ||
165 | /* Check ST RX state machine , where are we? */ | |
166 | switch (kim_gdata->rx_state) { | |
167 | /* Waiting for complete packet ? */ | |
5c88b021 | 168 | case ST_W4_DATA: |
e6d9e64e | 169 | pr_debug("Complete pkt received"); |
38d9df49 | 170 | validate_firmware_response(kim_gdata); |
d0088ce1 PS |
171 | kim_gdata->rx_state = ST_W4_PACKET_TYPE; |
172 | kim_gdata->rx_skb = NULL; | |
173 | continue; | |
174 | /* Waiting for Bluetooth event header ? */ | |
5c88b021 PS |
175 | case ST_W4_HEADER: |
176 | plen = | |
177 | (unsigned char *)&kim_gdata->rx_skb->data[1]; | |
178 | pr_debug("event hdr: plen 0x%02x\n", *plen); | |
179 | kim_check_data_len(kim_gdata, *plen); | |
d0088ce1 PS |
180 | continue; |
181 | } /* end of switch */ | |
182 | } /* end of if rx_state */ | |
183 | switch (*ptr) { | |
184 | /* Bluetooth event packet? */ | |
5c88b021 PS |
185 | case 0x04: |
186 | kim_gdata->rx_state = ST_W4_HEADER; | |
187 | kim_gdata->rx_count = 2; | |
188 | type = *ptr; | |
d0088ce1 PS |
189 | break; |
190 | default: | |
191 | pr_info("unknown packet"); | |
192 | ptr++; | |
193 | count--; | |
194 | continue; | |
36b5aee4 | 195 | } |
d0088ce1 PS |
196 | ptr++; |
197 | count--; | |
198 | kim_gdata->rx_skb = | |
5c88b021 | 199 | alloc_skb(1024+8, GFP_ATOMIC); |
d0088ce1 PS |
200 | if (!kim_gdata->rx_skb) { |
201 | pr_err("can't allocate mem for new packet"); | |
202 | kim_gdata->rx_state = ST_W4_PACKET_TYPE; | |
203 | kim_gdata->rx_count = 0; | |
204 | return; | |
36b5aee4 | 205 | } |
5c88b021 PS |
206 | skb_reserve(kim_gdata->rx_skb, 8); |
207 | kim_gdata->rx_skb->cb[0] = 4; | |
208 | kim_gdata->rx_skb->cb[1] = 0; | |
209 | ||
36b5aee4 | 210 | } |
d0088ce1 PS |
211 | return; |
212 | } | |
213 | ||
38d9df49 | 214 | static long read_local_version(struct kim_data_s *kim_gdata, char *bts_scr_name) |
d0088ce1 PS |
215 | { |
216 | unsigned short version = 0, chip = 0, min_ver = 0, maj_ver = 0; | |
73f12e8d | 217 | const char read_ver_cmd[] = { 0x01, 0x01, 0x10, 0x00 }; |
d0088ce1 | 218 | |
e6d9e64e | 219 | pr_debug("%s", __func__); |
d0088ce1 | 220 | |
16735d02 | 221 | reinit_completion(&kim_gdata->kim_rcvd); |
d0088ce1 PS |
222 | if (4 != st_int_write(kim_gdata->core_data, read_ver_cmd, 4)) { |
223 | pr_err("kim: couldn't write 4 bytes"); | |
70442664 | 224 | return -EIO; |
d0088ce1 PS |
225 | } |
226 | ||
53702358 PS |
227 | if (!wait_for_completion_interruptible_timeout( |
228 | &kim_gdata->kim_rcvd, msecs_to_jiffies(CMD_RESP_TIME))) { | |
d0088ce1 | 229 | pr_err(" waiting for ver info- timed out "); |
70442664 | 230 | return -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 | ||
247 | sprintf(bts_scr_name, "TIInit_%d.%d.%d.bts", chip, maj_ver, min_ver); | |
e2a53282 NJ |
248 | |
249 | /* to be accessed later via sysfs entry */ | |
250 | kim_gdata->version.full = version; | |
251 | kim_gdata->version.chip = chip; | |
252 | kim_gdata->version.maj_ver = maj_ver; | |
253 | kim_gdata->version.min_ver = min_ver; | |
254 | ||
d0088ce1 | 255 | pr_info("%s", bts_scr_name); |
320920cb | 256 | return 0; |
d0088ce1 PS |
257 | } |
258 | ||
27712b39 | 259 | static void skip_change_remote_baud(unsigned char **ptr, long *len) |
ef04d121 PS |
260 | { |
261 | unsigned char *nxt_action, *cur_action; | |
262 | cur_action = *ptr; | |
263 | ||
264 | nxt_action = cur_action + sizeof(struct bts_action) + | |
265 | ((struct bts_action *) cur_action)->size; | |
266 | ||
267 | if (((struct bts_action *) nxt_action)->type != ACTION_WAIT_EVENT) { | |
268 | pr_err("invalid action after change remote baud command"); | |
269 | } else { | |
270 | *ptr = *ptr + sizeof(struct bts_action) + | |
9d031d94 | 271 | ((struct bts_action *)cur_action)->size; |
ef04d121 | 272 | *len = *len - (sizeof(struct bts_action) + |
9d031d94 | 273 | ((struct bts_action *)cur_action)->size); |
ef04d121 PS |
274 | /* warn user on not commenting these in firmware */ |
275 | pr_warn("skipping the wait event of change remote baud"); | |
276 | } | |
277 | } | |
278 | ||
36b5aee4 PS |
279 | /** |
280 | * download_firmware - | |
281 | * internal function which parses through the .bts firmware | |
282 | * script file intreprets SEND, DELAY actions only as of now | |
d0088ce1 | 283 | */ |
38d9df49 | 284 | static long download_firmware(struct kim_data_s *kim_gdata) |
d0088ce1 | 285 | { |
320920cb | 286 | long err = 0; |
d0088ce1 | 287 | long len = 0; |
73f12e8d PS |
288 | unsigned char *ptr = NULL; |
289 | unsigned char *action_ptr = NULL; | |
d0088ce1 | 290 | unsigned char bts_scr_name[30] = { 0 }; /* 30 char long bts scr name? */ |
ef04d121 PS |
291 | int wr_room_space; |
292 | int cmd_size; | |
293 | unsigned long timeout; | |
d0088ce1 | 294 | |
38d9df49 | 295 | err = read_local_version(kim_gdata, bts_scr_name); |
320920cb | 296 | if (err != 0) { |
d0088ce1 PS |
297 | pr_err("kim: failed to read local ver"); |
298 | return err; | |
299 | } | |
300 | err = | |
301 | request_firmware(&kim_gdata->fw_entry, bts_scr_name, | |
302 | &kim_gdata->kim_pdev->dev); | |
303 | if (unlikely((err != 0) || (kim_gdata->fw_entry->data == NULL) || | |
304 | (kim_gdata->fw_entry->size == 0))) { | |
305 | pr_err(" request_firmware failed(errno %ld) for %s", err, | |
306 | bts_scr_name); | |
70442664 | 307 | return -EINVAL; |
d0088ce1 PS |
308 | } |
309 | ptr = (void *)kim_gdata->fw_entry->data; | |
310 | len = kim_gdata->fw_entry->size; | |
311 | /* bts_header to remove out magic number and | |
312 | * version | |
313 | */ | |
314 | ptr += sizeof(struct bts_header); | |
315 | len -= sizeof(struct bts_header); | |
316 | ||
317 | while (len > 0 && ptr) { | |
e6d9e64e | 318 | pr_debug(" action size %d, type %d ", |
d0088ce1 PS |
319 | ((struct bts_action *)ptr)->size, |
320 | ((struct bts_action *)ptr)->type); | |
321 | ||
322 | switch (((struct bts_action *)ptr)->type) { | |
323 | case ACTION_SEND_COMMAND: /* action send */ | |
2f81a02c | 324 | pr_debug("S"); |
d0088ce1 PS |
325 | action_ptr = &(((struct bts_action *)ptr)->data[0]); |
326 | if (unlikely | |
327 | (((struct hci_command *)action_ptr)->opcode == | |
328 | 0xFF36)) { | |
329 | /* ignore remote change | |
330 | * baud rate HCI VS command */ | |
ef04d121 | 331 | pr_warn("change remote baud" |
e6d9e64e | 332 | " rate command in firmware"); |
ef04d121 | 333 | skip_change_remote_baud(&ptr, &len); |
d0088ce1 PS |
334 | break; |
335 | } | |
ef04d121 PS |
336 | /* |
337 | * Make sure we have enough free space in uart | |
338 | * tx buffer to write current firmware command | |
339 | */ | |
340 | cmd_size = ((struct bts_action *)ptr)->size; | |
341 | timeout = jiffies + msecs_to_jiffies(CMD_WR_TIME); | |
342 | do { | |
343 | wr_room_space = | |
344 | st_get_uart_wr_room(kim_gdata->core_data); | |
345 | if (wr_room_space < 0) { | |
346 | pr_err("Unable to get free " | |
347 | "space info from uart tx buffer"); | |
348 | release_firmware(kim_gdata->fw_entry); | |
349 | return wr_room_space; | |
350 | } | |
351 | mdelay(1); /* wait 1ms before checking room */ | |
352 | } while ((wr_room_space < cmd_size) && | |
353 | time_before(jiffies, timeout)); | |
354 | ||
355 | /* Timeout happened ? */ | |
356 | if (time_after_eq(jiffies, timeout)) { | |
357 | pr_err("Timeout while waiting for free " | |
358 | "free space in uart tx buffer"); | |
359 | release_firmware(kim_gdata->fw_entry); | |
360 | return -ETIMEDOUT; | |
361 | } | |
2f81a02c PS |
362 | /* reinit completion before sending for the |
363 | * relevant wait | |
364 | */ | |
16735d02 | 365 | reinit_completion(&kim_gdata->kim_rcvd); |
d0088ce1 | 366 | |
ef04d121 PS |
367 | /* |
368 | * Free space found in uart buffer, call st_int_write | |
369 | * to send current firmware command to the uart tx | |
370 | * buffer. | |
371 | */ | |
d0088ce1 PS |
372 | err = st_int_write(kim_gdata->core_data, |
373 | ((struct bts_action_send *)action_ptr)->data, | |
374 | ((struct bts_action *)ptr)->size); | |
375 | if (unlikely(err < 0)) { | |
376 | release_firmware(kim_gdata->fw_entry); | |
70442664 | 377 | return err; |
d0088ce1 | 378 | } |
ef04d121 PS |
379 | /* |
380 | * Check number of bytes written to the uart tx buffer | |
381 | * and requested command write size | |
382 | */ | |
383 | if (err != cmd_size) { | |
384 | pr_err("Number of bytes written to uart " | |
385 | "tx buffer are not matching with " | |
386 | "requested cmd write size"); | |
387 | release_firmware(kim_gdata->fw_entry); | |
388 | return -EIO; | |
389 | } | |
390 | break; | |
391 | case ACTION_WAIT_EVENT: /* wait */ | |
2f81a02c | 392 | pr_debug("W"); |
53702358 PS |
393 | if (!wait_for_completion_interruptible_timeout( |
394 | &kim_gdata->kim_rcvd, | |
395 | msecs_to_jiffies(CMD_RESP_TIME))) { | |
ef04d121 | 396 | pr_err("response timeout during fw download "); |
d0088ce1 PS |
397 | /* timed out */ |
398 | release_firmware(kim_gdata->fw_entry); | |
70442664 | 399 | return -ETIMEDOUT; |
d0088ce1 | 400 | } |
16735d02 | 401 | reinit_completion(&kim_gdata->kim_rcvd); |
d0088ce1 PS |
402 | break; |
403 | case ACTION_DELAY: /* sleep */ | |
404 | pr_info("sleep command in scr"); | |
405 | action_ptr = &(((struct bts_action *)ptr)->data[0]); | |
406 | mdelay(((struct bts_action_delay *)action_ptr)->msec); | |
407 | break; | |
408 | } | |
409 | len = | |
410 | len - (sizeof(struct bts_action) + | |
411 | ((struct bts_action *)ptr)->size); | |
412 | ptr = | |
413 | ptr + sizeof(struct bts_action) + | |
414 | ((struct bts_action *)ptr)->size; | |
415 | } | |
416 | /* fw download complete */ | |
417 | release_firmware(kim_gdata->fw_entry); | |
320920cb | 418 | return 0; |
d0088ce1 PS |
419 | } |
420 | ||
421 | /**********************************************************************/ | |
422 | /* functions called from ST core */ | |
d0088ce1 PS |
423 | /* called from ST Core, when REG_IN_PROGRESS (registration in progress) |
424 | * can be because of | |
425 | * 1. response to read local version | |
426 | * 2. during send/recv's of firmware download | |
427 | */ | |
428 | void st_kim_recv(void *disc_data, const unsigned char *data, long count) | |
429 | { | |
38d9df49 PS |
430 | struct st_data_s *st_gdata = (struct st_data_s *)disc_data; |
431 | struct kim_data_s *kim_gdata = st_gdata->kim_data; | |
432 | ||
8565adbc PS |
433 | /* proceed to gather all data and distinguish read fw version response |
434 | * from other fw responses when data gathering is complete | |
435 | */ | |
436 | kim_int_recv(kim_gdata, data, count); | |
d0088ce1 PS |
437 | return; |
438 | } | |
439 | ||
440 | /* to signal completion of line discipline installation | |
441 | * called from ST Core, upon tty_open | |
442 | */ | |
38d9df49 | 443 | void st_kim_complete(void *kim_data) |
d0088ce1 | 444 | { |
38d9df49 | 445 | struct kim_data_s *kim_gdata = (struct kim_data_s *)kim_data; |
d0088ce1 PS |
446 | complete(&kim_gdata->ldisc_installed); |
447 | } | |
448 | ||
36b5aee4 PS |
449 | /** |
450 | * st_kim_start - called from ST Core upon 1st registration | |
451 | * This involves toggling the chip enable gpio, reading | |
452 | * the firmware version from chip, forming the fw file name | |
453 | * based on the chip version, requesting the fw, parsing it | |
454 | * and perform download(send/recv). | |
455 | */ | |
38d9df49 | 456 | long st_kim_start(void *kim_data) |
d0088ce1 | 457 | { |
320920cb | 458 | long err = 0; |
d0088ce1 | 459 | long retry = POR_RETRY_COUNT; |
0d7c5f25 | 460 | struct ti_st_plat_data *pdata; |
38d9df49 PS |
461 | struct kim_data_s *kim_gdata = (struct kim_data_s *)kim_data; |
462 | ||
d0088ce1 | 463 | pr_info(" %s", __func__); |
0d7c5f25 | 464 | pdata = kim_gdata->kim_pdev->dev.platform_data; |
d0088ce1 PS |
465 | |
466 | do { | |
0d7c5f25 PS |
467 | /* platform specific enabling code here */ |
468 | if (pdata->chip_enable) | |
469 | pdata->chip_enable(kim_gdata); | |
470 | ||
a7e2ca17 LC |
471 | /* Configure BT nShutdown to HIGH state */ |
472 | gpio_set_value(kim_gdata->nshutdown, GPIO_LOW); | |
473 | mdelay(5); /* FIXME: a proper toggle */ | |
474 | gpio_set_value(kim_gdata->nshutdown, GPIO_HIGH); | |
475 | mdelay(100); | |
d0088ce1 | 476 | /* re-initialize the completion */ |
16735d02 | 477 | reinit_completion(&kim_gdata->ldisc_installed); |
ec60d0ad PS |
478 | /* send notification to UIM */ |
479 | kim_gdata->ldisc_install = 1; | |
480 | pr_info("ldisc_install = 1"); | |
481 | sysfs_notify(&kim_gdata->kim_pdev->dev.kobj, | |
482 | NULL, "install"); | |
d0088ce1 | 483 | /* wait for ldisc to be installed */ |
53702358 PS |
484 | err = wait_for_completion_interruptible_timeout( |
485 | &kim_gdata->ldisc_installed, msecs_to_jiffies(LDISC_TIME)); | |
18ccecf9 PS |
486 | if (!err) { |
487 | /* ldisc installation timeout, | |
488 | * flush uart, power cycle BT_EN */ | |
489 | pr_err("ldisc installation timeout"); | |
490 | err = st_kim_stop(kim_gdata); | |
d0088ce1 PS |
491 | continue; |
492 | } else { | |
493 | /* ldisc installed now */ | |
18ccecf9 | 494 | pr_info("line discipline installed"); |
38d9df49 | 495 | err = download_firmware(kim_gdata); |
320920cb | 496 | if (err != 0) { |
18ccecf9 PS |
497 | /* ldisc installed but fw download failed, |
498 | * flush uart & power cycle BT_EN */ | |
d0088ce1 | 499 | pr_err("download firmware failed"); |
18ccecf9 | 500 | err = st_kim_stop(kim_gdata); |
d0088ce1 PS |
501 | continue; |
502 | } else { /* on success don't retry */ | |
503 | break; | |
504 | } | |
505 | } | |
506 | } while (retry--); | |
507 | return err; | |
508 | } | |
509 | ||
36b5aee4 | 510 | /** |
18ccecf9 PS |
511 | * st_kim_stop - stop communication with chip. |
512 | * This can be called from ST Core/KIM, on the- | |
513 | * (a) last un-register when chip need not be powered there-after, | |
514 | * (b) upon failure to either install ldisc or download firmware. | |
515 | * The function is responsible to (a) notify UIM about un-installation, | |
516 | * (b) flush UART if the ldisc was installed. | |
a7e2ca17 LC |
517 | * (c) reset BT_EN - pull down nshutdown at the end. |
518 | * (d) invoke platform's chip disabling routine. | |
36b5aee4 | 519 | */ |
38d9df49 | 520 | long st_kim_stop(void *kim_data) |
d0088ce1 | 521 | { |
320920cb | 522 | long err = 0; |
38d9df49 | 523 | struct kim_data_s *kim_gdata = (struct kim_data_s *)kim_data; |
0d7c5f25 PS |
524 | struct ti_st_plat_data *pdata = |
525 | kim_gdata->kim_pdev->dev.platform_data; | |
18ccecf9 | 526 | struct tty_struct *tty = kim_gdata->core_data->tty; |
d0088ce1 | 527 | |
16735d02 | 528 | reinit_completion(&kim_gdata->ldisc_installed); |
ec60d0ad | 529 | |
18ccecf9 PS |
530 | if (tty) { /* can be called before ldisc is installed */ |
531 | /* Flush any pending characters in the driver and discipline. */ | |
532 | tty_ldisc_flush(tty); | |
533 | tty_driver_flush_buffer(tty); | |
18ccecf9 | 534 | } |
ec60d0ad PS |
535 | |
536 | /* send uninstall notification to UIM */ | |
537 | pr_info("ldisc_install = 0"); | |
538 | kim_gdata->ldisc_install = 0; | |
539 | sysfs_notify(&kim_gdata->kim_pdev->dev.kobj, NULL, "install"); | |
d0088ce1 PS |
540 | |
541 | /* wait for ldisc to be un-installed */ | |
53702358 PS |
542 | err = wait_for_completion_interruptible_timeout( |
543 | &kim_gdata->ldisc_installed, msecs_to_jiffies(LDISC_TIME)); | |
d0088ce1 PS |
544 | if (!err) { /* timeout */ |
545 | pr_err(" timed out waiting for ldisc to be un-installed"); | |
b64365a5 | 546 | err = -ETIMEDOUT; |
d0088ce1 PS |
547 | } |
548 | ||
a7e2ca17 LC |
549 | /* By default configure BT nShutdown to LOW state */ |
550 | gpio_set_value(kim_gdata->nshutdown, GPIO_LOW); | |
551 | mdelay(1); | |
552 | gpio_set_value(kim_gdata->nshutdown, GPIO_HIGH); | |
553 | mdelay(1); | |
554 | gpio_set_value(kim_gdata->nshutdown, GPIO_LOW); | |
555 | ||
0d7c5f25 PS |
556 | /* platform specific disable */ |
557 | if (pdata->chip_disable) | |
558 | pdata->chip_disable(kim_gdata); | |
d0088ce1 PS |
559 | return err; |
560 | } | |
561 | ||
562 | /**********************************************************************/ | |
563 | /* functions called from subsystems */ | |
c1afac15 | 564 | /* called when debugfs entry is read from */ |
e2a53282 | 565 | |
c1afac15 | 566 | static int show_version(struct seq_file *s, void *unused) |
e2a53282 | 567 | { |
c1afac15 PS |
568 | struct kim_data_s *kim_gdata = (struct kim_data_s *)s->private; |
569 | seq_printf(s, "%04X %d.%d.%d\n", kim_gdata->version.full, | |
e2a53282 NJ |
570 | kim_gdata->version.chip, kim_gdata->version.maj_ver, |
571 | kim_gdata->version.min_ver); | |
c1afac15 | 572 | return 0; |
d0088ce1 PS |
573 | } |
574 | ||
c1afac15 | 575 | static int show_list(struct seq_file *s, void *unused) |
d0088ce1 | 576 | { |
c1afac15 PS |
577 | struct kim_data_s *kim_gdata = (struct kim_data_s *)s->private; |
578 | kim_st_list_protocols(kim_gdata->core_data, s); | |
579 | return 0; | |
d0088ce1 PS |
580 | } |
581 | ||
ec60d0ad PS |
582 | static ssize_t show_install(struct device *dev, |
583 | struct device_attribute *attr, char *buf) | |
d0088ce1 | 584 | { |
ec60d0ad PS |
585 | struct kim_data_s *kim_data = dev_get_drvdata(dev); |
586 | return sprintf(buf, "%d\n", kim_data->ldisc_install); | |
587 | } | |
d0088ce1 | 588 | |
933aae54 PS |
589 | #ifdef DEBUG |
590 | static ssize_t store_dev_name(struct device *dev, | |
591 | struct device_attribute *attr, const char *buf, size_t count) | |
592 | { | |
593 | struct kim_data_s *kim_data = dev_get_drvdata(dev); | |
594 | pr_debug("storing dev name >%s<", buf); | |
595 | strncpy(kim_data->dev_name, buf, count); | |
596 | pr_debug("stored dev name >%s<", kim_data->dev_name); | |
597 | return count; | |
598 | } | |
599 | ||
600 | static ssize_t store_baud_rate(struct device *dev, | |
601 | struct device_attribute *attr, const char *buf, size_t count) | |
602 | { | |
603 | struct kim_data_s *kim_data = dev_get_drvdata(dev); | |
604 | pr_debug("storing baud rate >%s<", buf); | |
605 | sscanf(buf, "%ld", &kim_data->baud_rate); | |
606 | pr_debug("stored baud rate >%ld<", kim_data->baud_rate); | |
607 | return count; | |
608 | } | |
609 | #endif /* if DEBUG */ | |
610 | ||
ec60d0ad PS |
611 | static ssize_t show_dev_name(struct device *dev, |
612 | struct device_attribute *attr, char *buf) | |
613 | { | |
614 | struct kim_data_s *kim_data = dev_get_drvdata(dev); | |
615 | return sprintf(buf, "%s\n", kim_data->dev_name); | |
616 | } | |
617 | ||
618 | static ssize_t show_baud_rate(struct device *dev, | |
619 | struct device_attribute *attr, char *buf) | |
620 | { | |
621 | struct kim_data_s *kim_data = dev_get_drvdata(dev); | |
622 | return sprintf(buf, "%ld\n", kim_data->baud_rate); | |
623 | } | |
624 | ||
625 | static ssize_t show_flow_cntrl(struct device *dev, | |
626 | struct device_attribute *attr, char *buf) | |
627 | { | |
628 | struct kim_data_s *kim_data = dev_get_drvdata(dev); | |
629 | return sprintf(buf, "%d\n", kim_data->flow_cntrl); | |
d0088ce1 PS |
630 | } |
631 | ||
ec60d0ad PS |
632 | /* structures specific for sysfs entries */ |
633 | static struct kobj_attribute ldisc_install = | |
634 | __ATTR(install, 0444, (void *)show_install, NULL); | |
635 | ||
636 | static struct kobj_attribute uart_dev_name = | |
933aae54 PS |
637 | #ifdef DEBUG /* TODO: move this to debug-fs if possible */ |
638 | __ATTR(dev_name, 0644, (void *)show_dev_name, (void *)store_dev_name); | |
639 | #else | |
ec60d0ad | 640 | __ATTR(dev_name, 0444, (void *)show_dev_name, NULL); |
933aae54 | 641 | #endif |
ec60d0ad PS |
642 | |
643 | static struct kobj_attribute uart_baud_rate = | |
933aae54 PS |
644 | #ifdef DEBUG /* TODO: move to debugfs */ |
645 | __ATTR(baud_rate, 0644, (void *)show_baud_rate, (void *)store_baud_rate); | |
646 | #else | |
ec60d0ad | 647 | __ATTR(baud_rate, 0444, (void *)show_baud_rate, NULL); |
933aae54 | 648 | #endif |
ec60d0ad PS |
649 | |
650 | static struct kobj_attribute uart_flow_cntrl = | |
651 | __ATTR(flow_cntrl, 0444, (void *)show_flow_cntrl, NULL); | |
652 | ||
653 | static struct attribute *uim_attrs[] = { | |
654 | &ldisc_install.attr, | |
655 | &uart_dev_name.attr, | |
656 | &uart_baud_rate.attr, | |
657 | &uart_flow_cntrl.attr, | |
658 | NULL, | |
659 | }; | |
660 | ||
661 | static struct attribute_group uim_attr_grp = { | |
662 | .attrs = uim_attrs, | |
663 | }; | |
664 | ||
36b5aee4 PS |
665 | /** |
666 | * st_kim_ref - reference the core's data | |
667 | * This references the per-ST platform device in the arch/xx/ | |
668 | * board-xx.c file. | |
669 | * This would enable multiple such platform devices to exist | |
670 | * on a given platform | |
671 | */ | |
dbd3a870 | 672 | void st_kim_ref(struct st_data_s **core_data, int id) |
d0088ce1 | 673 | { |
38d9df49 PS |
674 | struct platform_device *pdev; |
675 | struct kim_data_s *kim_gdata; | |
676 | /* get kim_gdata reference from platform device */ | |
dbd3a870 | 677 | pdev = st_get_plat_device(id); |
7316a9f2 SR |
678 | if (!pdev) { |
679 | *core_data = NULL; | |
680 | return; | |
681 | } | |
9093ca88 | 682 | kim_gdata = platform_get_drvdata(pdev); |
d0088ce1 PS |
683 | *core_data = kim_gdata->core_data; |
684 | } | |
685 | ||
c1afac15 PS |
686 | static int kim_version_open(struct inode *i, struct file *f) |
687 | { | |
688 | return single_open(f, show_version, i->i_private); | |
689 | } | |
690 | ||
691 | static int kim_list_open(struct inode *i, struct file *f) | |
692 | { | |
693 | return single_open(f, show_list, i->i_private); | |
694 | } | |
695 | ||
696 | static const struct file_operations version_debugfs_fops = { | |
697 | /* version info */ | |
698 | .open = kim_version_open, | |
699 | .read = seq_read, | |
700 | .llseek = seq_lseek, | |
701 | .release = single_release, | |
702 | }; | |
703 | static const struct file_operations list_debugfs_fops = { | |
704 | /* protocols info */ | |
705 | .open = kim_list_open, | |
706 | .read = seq_read, | |
707 | .llseek = seq_lseek, | |
708 | .release = single_release, | |
709 | }; | |
710 | ||
d0088ce1 PS |
711 | /**********************************************************************/ |
712 | /* functions called from platform device driver subsystem | |
713 | * need to have a relevant platform device entry in the platform's | |
714 | * board-*.c file | |
715 | */ | |
716 | ||
27712b39 | 717 | static struct dentry *kim_debugfs_dir; |
d0088ce1 PS |
718 | static int kim_probe(struct platform_device *pdev) |
719 | { | |
38d9df49 | 720 | struct kim_data_s *kim_gdata; |
ec60d0ad | 721 | struct ti_st_plat_data *pdata = pdev->dev.platform_data; |
b2997387 | 722 | int err; |
38d9df49 | 723 | |
dfb7ef7d PS |
724 | if ((pdev->id != -1) && (pdev->id < MAX_ST_DEVICES)) { |
725 | /* multiple devices could exist */ | |
726 | st_kim_devices[pdev->id] = pdev; | |
727 | } else { | |
25985edc | 728 | /* platform's sure about existence of 1 device */ |
dfb7ef7d PS |
729 | st_kim_devices[0] = pdev; |
730 | } | |
731 | ||
38d9df49 PS |
732 | kim_gdata = kzalloc(sizeof(struct kim_data_s), GFP_ATOMIC); |
733 | if (!kim_gdata) { | |
734 | pr_err("no mem to allocate"); | |
735 | return -ENOMEM; | |
736 | } | |
9093ca88 | 737 | platform_set_drvdata(pdev, kim_gdata); |
d0088ce1 | 738 | |
b2997387 MK |
739 | err = st_core_init(&kim_gdata->core_data); |
740 | if (err != 0) { | |
d0088ce1 | 741 | pr_err(" ST core init failed"); |
b2997387 MK |
742 | err = -EIO; |
743 | goto err_core_init; | |
d0088ce1 | 744 | } |
38d9df49 PS |
745 | /* refer to itself */ |
746 | kim_gdata->core_data->kim_data = kim_gdata; | |
d0088ce1 | 747 | |
a7e2ca17 LC |
748 | /* Claim the chip enable nShutdown gpio from the system */ |
749 | kim_gdata->nshutdown = pdata->nshutdown_gpio; | |
750 | err = gpio_request(kim_gdata->nshutdown, "kim"); | |
751 | if (unlikely(err)) { | |
752 | pr_err(" gpio %ld request failed ", kim_gdata->nshutdown); | |
753 | return err; | |
754 | } | |
755 | ||
756 | /* Configure nShutdown GPIO as output=0 */ | |
757 | err = gpio_direction_output(kim_gdata->nshutdown, 0); | |
758 | if (unlikely(err)) { | |
759 | pr_err(" unable to configure gpio %ld", kim_gdata->nshutdown); | |
760 | return err; | |
761 | } | |
d0088ce1 PS |
762 | /* get reference of pdev for request_firmware |
763 | */ | |
764 | kim_gdata->kim_pdev = pdev; | |
765 | init_completion(&kim_gdata->kim_rcvd); | |
766 | init_completion(&kim_gdata->ldisc_installed); | |
b38fc2d9 | 767 | |
b2997387 MK |
768 | err = sysfs_create_group(&pdev->dev.kobj, &uim_attr_grp); |
769 | if (err) { | |
ec60d0ad | 770 | pr_err("failed to create sysfs entries"); |
b2997387 | 771 | goto err_sysfs_group; |
d0088ce1 | 772 | } |
e2a53282 | 773 | |
ec60d0ad PS |
774 | /* copying platform data */ |
775 | strncpy(kim_gdata->dev_name, pdata->dev_name, UART_DEV_NAME_LEN); | |
776 | kim_gdata->flow_cntrl = pdata->flow_cntrl; | |
777 | kim_gdata->baud_rate = pdata->baud_rate; | |
778 | pr_info("sysfs entries created\n"); | |
779 | ||
c1afac15 PS |
780 | kim_debugfs_dir = debugfs_create_dir("ti-st", NULL); |
781 | if (IS_ERR(kim_debugfs_dir)) { | |
782 | pr_err(" debugfs entries creation failed "); | |
b2997387 MK |
783 | err = -EIO; |
784 | goto err_debugfs_dir; | |
e2a53282 | 785 | } |
c1afac15 PS |
786 | |
787 | debugfs_create_file("version", S_IRUGO, kim_debugfs_dir, | |
788 | kim_gdata, &version_debugfs_fops); | |
789 | debugfs_create_file("protocols", S_IRUGO, kim_debugfs_dir, | |
790 | kim_gdata, &list_debugfs_fops); | |
791 | pr_info(" debugfs entries created "); | |
320920cb | 792 | return 0; |
b2997387 MK |
793 | |
794 | err_debugfs_dir: | |
795 | sysfs_remove_group(&pdev->dev.kobj, &uim_attr_grp); | |
796 | ||
797 | err_sysfs_group: | |
798 | st_core_exit(kim_gdata->core_data); | |
799 | ||
800 | err_core_init: | |
801 | kfree(kim_gdata); | |
802 | ||
803 | return err; | |
d0088ce1 PS |
804 | } |
805 | ||
806 | static int kim_remove(struct platform_device *pdev) | |
807 | { | |
a7e2ca17 LC |
808 | /* free the GPIOs requested */ |
809 | struct ti_st_plat_data *pdata = pdev->dev.platform_data; | |
38d9df49 PS |
810 | struct kim_data_s *kim_gdata; |
811 | ||
9093ca88 | 812 | kim_gdata = platform_get_drvdata(pdev); |
d0088ce1 | 813 | |
a7e2ca17 LC |
814 | /* Free the Bluetooth/FM/GPIO |
815 | * nShutdown gpio from the system | |
816 | */ | |
817 | gpio_free(pdata->nshutdown_gpio); | |
818 | pr_info("nshutdown GPIO Freed"); | |
819 | ||
781a7395 | 820 | debugfs_remove_recursive(kim_debugfs_dir); |
ec60d0ad | 821 | sysfs_remove_group(&pdev->dev.kobj, &uim_attr_grp); |
781a7395 PS |
822 | pr_info("sysfs entries removed"); |
823 | ||
d0088ce1 PS |
824 | kim_gdata->kim_pdev = NULL; |
825 | st_core_exit(kim_gdata->core_data); | |
38d9df49 PS |
826 | |
827 | kfree(kim_gdata); | |
828 | kim_gdata = NULL; | |
320920cb | 829 | return 0; |
d0088ce1 PS |
830 | } |
831 | ||
27712b39 | 832 | static int kim_suspend(struct platform_device *pdev, pm_message_t state) |
ec60d0ad PS |
833 | { |
834 | struct ti_st_plat_data *pdata = pdev->dev.platform_data; | |
835 | ||
836 | if (pdata->suspend) | |
837 | return pdata->suspend(pdev, state); | |
838 | ||
839 | return -EOPNOTSUPP; | |
840 | } | |
841 | ||
27712b39 | 842 | static int kim_resume(struct platform_device *pdev) |
ec60d0ad PS |
843 | { |
844 | struct ti_st_plat_data *pdata = pdev->dev.platform_data; | |
845 | ||
846 | if (pdata->resume) | |
847 | return pdata->resume(pdev); | |
848 | ||
849 | return -EOPNOTSUPP; | |
850 | } | |
851 | ||
d0088ce1 PS |
852 | /**********************************************************************/ |
853 | /* entry point for ST KIM module, called in from ST Core */ | |
ec60d0ad PS |
854 | static struct platform_driver kim_platform_driver = { |
855 | .probe = kim_probe, | |
856 | .remove = kim_remove, | |
857 | .suspend = kim_suspend, | |
858 | .resume = kim_resume, | |
859 | .driver = { | |
860 | .name = "kim", | |
861 | .owner = THIS_MODULE, | |
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"); |